WO2018164373A1 - Dispositif de raccordement de tuyaux - Google Patents

Dispositif de raccordement de tuyaux Download PDF

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Publication number
WO2018164373A1
WO2018164373A1 PCT/KR2018/001303 KR2018001303W WO2018164373A1 WO 2018164373 A1 WO2018164373 A1 WO 2018164373A1 KR 2018001303 W KR2018001303 W KR 2018001303W WO 2018164373 A1 WO2018164373 A1 WO 2018164373A1
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WO
WIPO (PCT)
Prior art keywords
pipe
ring
swaging
outer body
fastening
Prior art date
Application number
PCT/KR2018/001303
Other languages
English (en)
Korean (ko)
Inventor
홍현국
조웅희
제갈민수
Original Assignee
주식회사 메가조인트
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020170028909A external-priority patent/KR101792571B1/ko
Priority claimed from KR1020170106550A external-priority patent/KR101937862B1/ko
Priority claimed from KR1020170106549A external-priority patent/KR101937860B1/ko
Application filed by 주식회사 메가조인트 filed Critical 주식회사 메가조인트
Priority to SG11201908184W priority Critical patent/SG11201908184WA/en
Publication of WO2018164373A1 publication Critical patent/WO2018164373A1/fr
Priority to PH12019550158A priority patent/PH12019550158A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars

Definitions

  • the present application relates to a pipe connection device.
  • Pipes are widely used as part of piping or structures for leak-free transfer of fluids and the like due to their ease of production and structural advantages.
  • the joining method of the pipe may be a mechanical joint method or a welding / fusion method.
  • mechanical joints can be divided into decomposable (separable) coupling and permanent coupling. Threaded joints and bolted joints provide flanges with the former, while press joints and swaging provide permanent bonds.
  • welding / welding is regarded as a technique for extending the continuity of pipes, and thus is recognized as an excellent bonding method that is permanent and its performance is verified.
  • butt welding is the most commonly used welding method, and the change or branch of the pipe line is solved by using fittings (welding fittings) such as butt welding elbows, tees, and duplexes, or by bending the pipes themselves.
  • welding fittings welding fittings
  • FIGS. 1A and 1B are cross-sectional views schematically showing before and after swaging of a conventional pipe connecting device.
  • a conventional apparatus for connecting pipes using the swaging principle includes a body 330 that cylindrically surrounds an area from ends of the pipes 210 and 220, and the body 330. And swage rings 310, 320 that linearly move along the longitudinal direction toward the center to reduce the outer diameter of the body.
  • the swaging rings 310 and 320 move, the outer diameter of the body 330 is reduced, and the gap between the inner surface of the body 330 and the outer surfaces of the pipes 210 and 220 is removed, thereby preventing the fluid from leaking and 220 is strongly fixed to the body 330.
  • the conventional apparatus for connecting pipes 210 and 220 by using the swaging principle is commercialized in a direction in which the detailed shapes of the body and the ring are slightly different while satisfying two basic purposes of preventing fluid leakage and fixing the pipe. It is becoming.
  • the present application provides a pipe connecting device that can increase the mechanical coupling force, lower the manufacturing cost, and reduce the weight and size compared to the conventional pipe (pipe) connecting device while maintaining the advantages of the swaging method pipe (pipe) connecting device It aims to do it.
  • the pipe connecting device As a technical means for achieving the above technical problem, the pipe connecting device according to the first aspect of the present invention, the outer body is inserted into the end of the first pipe is inserted from the rear end of the second pipe from the front; And a swage ring surrounding and surrounding the outer circumference of the outer body, wherein the contact and pressurization of the swage ring is in contact with only the introduction of the swage ring in the outer body.
  • the initial inner diameter before swaging of the swaging ring may be smaller than the initial outer diameter before swaging of the outer body.
  • the outer body is inserted into the end of the first pipe from the rear end and the end of the second pipe from the front; And a swaging ring surrounding and contacting and pressing the outer circumference of the outer body, wherein an initial inner diameter before swaging of the swage ring is smaller than an initial outer diameter before swaging of the outer body, and contacting and pressing the swaging ring Silver is made in the middle portion of the outer body except for the rear inlet in contact only when the introduction of the swage ring and the front end is not in contact with the swage ring, the fastening groove on the outer peripheral surface of the front end of the outer body Is formed, and the swage ring protrudes obliquely toward the front inward and includes a front part provided with a fastening protrusion for fastening to the fastening groove, and the fastening protrusion is formed on the outer circumferential surface of the outer
  • the outer body is inserted into the end of the first pipe from the rear end is inserted into the end of the second pipe from the front; And a swaging ring surrounding and outer contacting and pressing the outer circumference of the rear part of the outer body, wherein the initial inner diameter before swaging of the outer ring is smaller than the initial outer diameter before swaging of the outer body, and The contacting and pressing are made with respect to the intermediate part except for the rear inlet part which is contacted only upon introduction of the swage ring and the front end which is not in contact with the swage ring of the rear part, and the outer peripheral surface of the front end of the rear part.
  • the swaging ring includes a front portion provided with a fastening protrusion to be projected obliquely toward the front inward to the fastening groove, the fastening projection is the outer body by the axial compression force thereto May be deformed into a restrained state which is fastened to the fastening groove in an initial state protruding so as not to interfere with the outer peripheral surface of .
  • the outer body is provided without a structure (for example, a projecting structure for mounting the fastening tool) or the outer protrusion, the outer body protrudes from the outer peripheral surface, the outer body is in the form of a pipe It is possible to produce a raw material of as little as possible to produce a form, the manufacturing cost can be greatly reduced.
  • the intermediate portion of the outer body has a structure that all swashes, even if the body length is shorter than the conventional, it is possible to ensure the mechanical strength equal to or higher than the conventional, it is possible to reduce the weight of fastening tools, pipe fittings, etc. Easy construction is possible even in a narrower space.
  • the outer body is formed by swaging.
  • the middle part of the outer body has a reduced outer diameter and the front end of the outer body can have a relatively larger outer diameter than the middle part, thereby limiting the forward movement of the enclosing swage ring, which presses the outer periphery of the middle part of the outer body.
  • a pipe connection device which is automatically formed by swaging can be implemented without the need for the configuration of.
  • the fastening protrusion of the swage ring and the fastening groove of the outer body is fastened so that the swage ring and the outer body can be mechanically coupled, using a conventional friction coupling Compared with the method of preventing departure from the outer body of the wedge ring, it is possible to secure a high release stopping force, thereby ensuring a greater mechanical coupling force against vibration and shock.
  • the outer body is provided with a structure (for example, a projecting structure for mounting a fastening tool) or an outer protrusion that protrudes from the outer circumferential surface, so that the outer body can be manufactured with only as little processing of the pipe-type raw material as possible. It can be in the form, it can be significantly reduced manufacturing costs.
  • the intermediate portion of the outer body has a structure that all swashes, even if the body length is shorter than the conventional, it is possible to ensure the mechanical strength equal to or higher than the conventional, it is possible to reduce the weight of fastening tools, pipe fittings, etc. Easy construction is possible even in a narrower space.
  • the outer diameter of the outer body is reduced by the swaging and the front end of the outer body can be relatively larger than the middle portion, so that the outer portion of the middle of the outer body
  • a pipe connecting device can be implemented in which a restricting jaw that restricts the forward movement of the swaging ring enclosing the outer circumference is automatically formed by swaging without any additional configuration.
  • the fastening protrusion of the swage ring and the fastening groove of the outer body is fastened so that the swage ring and the outer body can be mechanically coupled, using a conventional friction coupling Compared with the method of preventing departure from the outer body of the wedge ring, it is possible to secure a high release stopping force, thereby ensuring a greater mechanical coupling force against vibration and shock.
  • the outer body is provided with a structure (for example, a projecting structure for mounting a fastening tool) or an outer protrusion that protrudes from the outer circumferential surface, so that the outer body can be manufactured with only as little processing of the pipe-type raw material as possible. It can be in the form, it can be significantly reduced manufacturing costs.
  • both the front part and the rear part of the outer part of the outer body have a structure that is swedled, even if the body length is shorter than the conventional one, it is possible to secure mechanical strength equal to or higher than that of the conventional one, and the weight of the fastening tool, pipe fitting, etc. It is possible to reduce, and easy construction is possible even in a narrower space than before.
  • the outer diameter of the front part and the rear part of the outer body is reduced by swaging and the front end of the outer body or the front end of the front part and the rear part is intermediate
  • the outer diameter may be relatively larger than that of the outer body, thereby pressing the outer circumference of the middle part of the outer part and pressing the outer circumference of the middle part of the rear part of the outer body and the restricting jaw, which limits the movement of the surrounding swage ring to the rear.
  • a pipe connecting device can be implemented in which the limiting jaw for which the forward movement of the surrounding swaging ring is restricted is automatically formed by swaging without any additional configuration.
  • FIGS. 1A and 1B are cross-sectional views schematically showing before and after swaging of a conventional pipe connecting device.
  • FIG. 2 is a schematic cross-sectional view of a pipe connection device according to a first embodiment of the present application.
  • FIG 3 is a schematic cross-sectional view for explaining that the swaging ring of the pipe connection device according to the first embodiment of the present invention is introduced into the rear inlet for swaging.
  • FIG. 4 is a schematic cross-sectional view showing a state in which both front and rear ends of the outer body are in contact with the fastening tool during the forward movement of the swaging ring in the pipe connecting device according to the first embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional view and a portion for explaining a swaging completion state (before the fastening tool is removed) in which both front and rear ends of the swaging ring are in contact with the fastening tool in the pipe connecting device according to the first embodiment of the present application; It is an enlarged view.
  • FIG. 6 is a schematic cross-sectional view of one embodiment of a pipe connection device according to a first embodiment of the present application including an insert ring.
  • FIG. 7 is a schematic cross-sectional view for explaining that the swaging ring of one embodiment of the pipe connection device according to the first embodiment of the present application including the insert ring is introduced into the rear inlet for swaging.
  • FIG. 8 is a schematic cross-sectional view of another embodiment of a pipe connection device according to the first embodiment of the present application including an insert ring.
  • FIG. 9 is a schematic cross-sectional view for explaining that the swaging ring of another embodiment of the pipe connection device according to the first embodiment of the present application including the insert ring is introduced into the rear inlet for swaging.
  • FIG. 10 is a schematic cross-sectional view of a pipe connection device according to a second embodiment of the present application.
  • FIG. 11 is a schematic cross-sectional view for explaining that the swaging ring of the pipe connecting device according to the second embodiment of the present invention is introduced into the rear inlet for swaging.
  • FIG. 12 is an enlarged view of A of FIG. 10.
  • FIG. 13 is a schematic conceptual cross-sectional view for explaining that the fastening protrusion of the pipe connecting device according to the second embodiment of the present disclosure is in contact with the first ring contact circumferential surface.
  • FIG. 14 is a schematic conceptual cross-sectional view for explaining that the fastening protrusion of the pipe connecting device according to the second embodiment of the present disclosure, in which the fastening groove is previously formed, is in contact with the first ring contact circumferential surface.
  • 15 is a schematic cross-sectional view of a pipe connection device according to a third embodiment of the present application.
  • FIG. 16 is a schematic cross sectional view showing that the swaging ring of the pipe connection device according to the third embodiment of the present invention is introduced into the rear inlet for swaging.
  • FIG. 17 is an enlarged view of A of FIG. 15.
  • FIG. 18 is a schematic cross-sectional view of another embodiment of a pipe connection device according to a third embodiment of the present application.
  • 19 is an enlarged view of B of FIG. 18.
  • 20 is a schematic cross sectional view showing that the swaging ring of another embodiment of the pipe connection device according to the third embodiment of the present invention is introduced into the rear inlet for swaging.
  • the longitudinal direction (length direction) of a pipe is defined and demonstrated in front-back direction.
  • the 3 o'clock direction (right direction) may be forward and the 9 o'clock direction (left direction) may be rearward based on FIG. 2.
  • the longitudinal direction of the pipe does not depend only on the front-rear direction in the actual arrangement of the pipe.
  • the pipes may be arranged in various directions (eg, up and down directions, oblique directions, etc.) as well as the front and rear directions, depending on the pipe arrangement needs.
  • first pipe connecting device (hereinafter, referred to as 'the first pipe connecting device') according to the first embodiment of the present application will be described.
  • reference numerals used in the following description of the first pipe connection device may be understood as reference numerals corresponding to the reference numerals shown in FIGS. 1 to 9.
  • FIG. 2 is a schematic cross sectional view of the present first pipe connecting device
  • FIG. 3 is a schematic cross sectional view for explaining that the swaging ring of the first pipe connecting device is introduced into the rear inlet for swaging.
  • the description herein in consideration of at least some of the plastic deformation caused by swaging in the figures herein, which may be simplified or omitted.
  • the first pipe connecting device relates to a device for interconnecting opposite ends of two pipes 210, 220.
  • the first pipe connecting device includes an outer body 11.
  • the outer body 11 is configured such that an end portion of the first pipe 210 is inserted from the rear (9 o'clock based on FIG. 2) and an end portion of the second pipe 220 is inserted from the front (3 o'clock based on FIG. 2). to be.
  • the outer body 11 may be disposed in such a manner that a portion of the rear inlet portion 11b and the middle portion 11a surrounds an end portion (front end portion) of the first pipe 210.
  • the outer body 11 may be disposed in a form in which a portion of the front end 11c and the middle portion 11a surround an end (rear end) of the second pipe 220.
  • the outer body 11 may be divided into a front end 11c, a middle portion 11a, and a rear inlet portion 11b along the longitudinal direction (3 o'clock to 9 o'clock based on FIG. 2).
  • the rear introduction portion 11b may mean a portion into which the swage ring 15 to be described later is introduced.
  • the intermediate portion 11a may be an intermediate portion except for the rear inlet portion 11b and the front end portion 11c.
  • the front end 11c may basically include a portion where the swaging ring 15 does not reach and is not contacted.
  • the front end (11c) is in contact with the swage ring 15 is a predetermined swaging is made, but not swaging by the portion of the swage ring 15 having a constant smallest inner diameter, toward the front It may also include a portion in which swaging is gradually relaxed by a tapered portion so that the inner diameter is gradually increased. That is, the front end 11c is a front portion in which no maximum swaging is made by the portion having the minimum inner diameter of the swaging ring 15 (the front portion and the swaging ring in which a small swaging is relaxed than the maximum swaging are formed). Uncontacted to unreached front part).
  • the middle portion 11a of the outer body 11 has a strength that exceeds the strength of the first pipe 210 and the strength of the second pipe 220 so that its minimum thickness is the thickness of the first pipe 210 and the first. It may be thicker than the thickness of the two pipes 220.
  • the minimum thickness of the middle portion 11a may be a minimum thickness measured based on a portion where the inner protrusion 116 and the stopper 117, which will be described later, of the middle portion 11a are not formed.
  • the outer body 11 is configured to be in close contact (contact) with the outer circumferential surfaces of the first pipe 210 and the second pipe 220 which are pressed by the swage ring 15 to be described later, and positioned therein.
  • the first pipe 210 and the second pipe are mechanically prevented while preventing the leakage of materials inside the 210 and the second pipe 220 and the disengagement of the first pipe 210 and the second pipe 220.
  • 220 may be connected.
  • the outer body 11 needs to have a mechanical strength equal to or higher than that of the first pipe 210 and the second pipe 220.
  • the minimum thickness of the outer body 11 may be set thicker than the thickness of the first pipe 210 and the thickness of the second pipe 220.
  • the minimum thickness of the middle portion 11a of the outer body 11 is half of the difference between the maximum outer diameter and the minimum outer diameter in consideration of the tolerance of the first pipe 210 or the second pipe 220 and the first pipe 210. It can be set thicker than the larger of the minimum thickness of.
  • the minimum thickness of the middle portion 11a of the outer body 11 is set to be thicker than half of the difference between the maximum outer diameter and the minimum outer diameter of the pipe in consideration of the pipe tolerance, is the pipe (first pipe 210 or the second Regardless of the outer diameter of the pipe 220, the conditions under which airtightness can be ensured by the pressure of the swage ring 15, and the swage ring 15 is a pipe (the first pipe 210 and the second pipe 220).
  • This setting takes into account the conditions that can be arranged (set) to surround the outer circumferential surface of)).
  • Equation 1 may be referred to as a condition for securing airtightness regardless of the outer diameter of the pipe (the first pipe 210 or the second pipe 220).
  • the inner diameter B of the swaging ring 15 must be larger than the maximum outer diameter A max of the pipe considering the pipe tolerance so that the swaging ring 15 surrounds the outer circumferential surface of the pipe.
  • the swage ring 15 can be arranged.
  • Equation 3 Equation 3
  • a max is the maximum outer diameter of the pipe in consideration of the tolerance of the pipe (first pipe 210 or the second pipe 220)
  • a min is the pipe (first pipe 210 or the second pipe)
  • the minimum outer diameter of the pipe taking into account the tolerance of 220, D is the thickness of the outer body 11.
  • the thickness of the outer body 11, in particular, the minimum thickness of the middle portion 11a of the outer body 11 is less than half of the difference between the maximum outer diameter and the minimum outer diameter in consideration of the pipe tolerances. It is preferable to set it thick.
  • the fact that the minimum thickness of the middle portion 11a of the outer body 11 is set thicker than the minimum thickness of the pipe means that the outer force is applied to the axial force acting on the pipe (the first pipe 210 or the second pipe 220). It is a setting in consideration of the conditions for the body 11 to have the same strength as the pipe (the first pipe 210 or the second pipe 220).
  • the first pipe 210 (or the second pipe 220) has a standard outer diameter of 60 mm, a thickness of 2 mm, and has an outer diameter tolerance of +/- 1 mm and a thickness tolerance of +/- 0.5 mm
  • the minimum outer diameter of the first pipe 210 (or the second pipe 220) is 59 mm
  • the maximum outer diameter is 61 mm
  • the minimum value of the thickness is 1.5 mm.
  • the minimum thickness of the outer body 11 is 1mm and the first pipe 210 which is half of the difference between the maximum value and the minimum value of the outer diameter of the first pipe 210 (or the second pipe 220).
  • 1.5 mm or more which is the larger of the minimum thickness 1.5 mm of the second pipe 220.
  • the middle portion 11a of the outer body 11 has an outer side on its outer circumferential surface to enable smooth movement to reduce frictional resistance in the longitudinal direction (the longitudinal direction of the pipe) of the swage ring 15. It is preferable to be provided with the smooth round surface (circumferential surface) without the formation of protrusions and protrusions.
  • the thickness of at least a portion of the middle portion 11a may be set to be constant along the longitudinal direction (length direction).
  • the rear inlet portion 11b of the outer body 11 has an outer diameter less than or equal to the outer diameter of the intermediate portion 11a so that initial entry into the outer body 11 of the swage ring 15 may be easier. It may be provided to.
  • the front end 11c of the outer body 11 refers to a portion where the swaging ring 15 does not reach and is not in contact, and may be provided to have an outer diameter greater than or equal to the outer diameter of the intermediate portion 11a.
  • the first pipe connecting device includes a swage ring 15.
  • the initial inner diameter before swaging of the swage ring 15 may be smaller than the initial outer diameter before swaging of the outer body 11 (in particular, the middle portion 11a).
  • the swage ring 15 may be introduced from the rear inlet portion 11b to move forward and swaging the outer body 11.
  • the swage ring 15 contacts and presses the outer circumference of the outer body 11.
  • the contact and pressurization of the swage ring 15 to the outer body 11 is brought into contact with the rear inlet 11b and the swage ring 15 which are only in contact with the introduction of the swage ring 15 in the outer body 11. It can be made with respect to the intermediate portion 11a except for the front end 11c, which is not. However, when the shear taper portion 152 to be described later is formed in the swage ring 15, the front taper portion 152 of the swage ring 15 may also contact the front end 11c.
  • the portion of the front end 11c which is thus in contact with the shear tapered portion 152 is gradually along the increasingly expanding inner diameter of the shear tapered portion as compared to the swaging by the portion having the constant minimum inner diameter of the swage ring 15.
  • This can be said to be a part that swaging is relaxed.
  • the middle portion 11a may mean a portion where swaging is performed by a constant minimum inner diameter of the swaging ring 15, and the front end 11c is a front (front) portion of the middle portion 11a.
  • the swage ring 15 may include a portion that is not reached.
  • the swage ring 15 may include a portion where the shear taper portion swizzles. To this end, the swage ring 15 may have a shorter length than the outer body 11 to surround the outer circumference of the middle portion 11a of the outer body 11. In other words, the length of the swage ring 15 may be set to a length capable of contacting only the outer circumference of the middle portion 11a of the outer body 11 to press the middle portion 11a.
  • the outer body 11 may be in a state in which at least a part thereof is plastically deformed by swaging.
  • the middle portion 11a of the outer body 11 may be deformed in a direction in which the outer diameter is reduced by swaging.
  • the rear inlet portion 11b of the outer body 11 is deformed in a direction in which the outer diameter is reduced by swaging of the swage ring 15, and at least a portion of the outer body 11 is elastically passed after the swage ring 15 passes.
  • the outer peripheral surface side thereof may be pulled forward at least in part according to the movement of the swage ring 15 to be deformed in a direction in which the outer diameter becomes larger than the middle portion 11a. This will be described in more detail below.
  • Figure 4 is a schematic cross-sectional view showing a state in which both the front and rear ends of the outer body in contact with the fastening tool during the front movement of the swaging ring in the pipe connection device according to an embodiment of the present application
  • Figure 5 is an embodiment of the present application It is a schematic sectional drawing and a partial enlarged view for demonstrating the state which completed swaging (the state before a fastening tool was removed) by contacting a fastening tool by the front and back both ends of a swaging ring in the pipe connection apparatus according to this.
  • the outer circumferential surface of the 210 and the outer circumferential surface of the second pipe 220 may be pressurized.
  • the intermediate portion 11a is more than the front end portion 11c due to the swaging of the swaging ring 15 which deforms the intermediate portion 11a in the direction of decreasing outer diameter.
  • the outer diameter becomes small.
  • the outer end portion 11c has a larger outer diameter than the middle portion 11a. 3 to 5, as described above, since the swage ring 15 has a shorter length than the outer body 11, the middle of the outer body 11 may not reach the front end 11c.
  • the part 11a can be pressurized. Accordingly, the front end 11c of the outer body 11 may be in a state in which the outer diameter is relatively larger than the middle portion 11a of the outer body 11 having the reduced outer diameter.
  • the front end 11c can prevent the departure of the swaging ring 15 by an outer diameter relatively larger than the middle portion 11a. Can be.
  • the front end 11c naturally having a relatively large outer diameter compared to the middle portion 11a by the swaging method of pressing only the middle portion 11a of the outer body 11 of the present application is after swaging is completed.
  • the swaging ring 15 may serve as a limiting jaw (limiter) that restricts further advancement in the direction in which the swaging ring 15 has advanced.
  • the rear inlet portion 11b has an outer diameter size that is less than the outer diameter size of the intermediate portion 11a and the inner diameter size of the swage ring 15 on the basis of the deformation before swaging.
  • the rear end 113 and the rear end 113 and the inclined connecting portion 114 for connecting the intermediate portion 11a inclined may be included.
  • the outer body 11 having such a rear inlet 11b has the smallest outer diameter of the rear end 113 of the rear inlet 11b, and is inclined by an inclined connection 114 extending forward from the rear end 113. Accordingly, the outer diameter may be continuously increased, and the outer diameter may be constantly maintained from the middle portion 11a. According to this, the outer diameter of the rear inlet 11b may be smaller than the outer diameter of the front end 11c.
  • the swage ring 15 is opened through the rear end 113 of the rear inlet 11b. After introduction, the swage ring 15 may not be easily separated from the rear inlet portion 11b by frictional resistance due to pressurization. Specifically, referring to FIG. 3, introduction of the swage ring 15 through the rear end 113 of the rear inlet 11b is such that the front end of the swage ring 15 is overlaid on at least a portion of the rear inlet 11b. Can be done.
  • the outer diameter of the rear end portion 113 of the rear introduction portion 11b is set to be equal to or larger than the inner diameter size of the swage ring 15, the rear end portion of the rear introduction portion 11b of the swage ring 15 ( When introduced through 113, the swage ring 15 may be fit-fitted through the rear end 113 of the rear inlet 11b by a force of a predetermined level or more, and then swaging by moving forward. It may not be easily separated or separated rearward through the rear posterior introduction portion 11b.
  • the rear inlet portion 11b is deformed by the swage ring 15 and at least partially deformed after the swage ring 15 passes, or the outer circumferential side thereof is the swage ring 15.
  • the outer diameter may be relatively larger than the middle portion 11a due to the movement of at least a portion of the front portion. That is, the rear inlet 11b acts as a limiting jaw (limiter) on the rear side to prevent the swaging ring 15 from being separated or detached rearward through one or more of such deformation recovery and outer diameter change due to the pulling force. Can be performed. Specifically, referring to FIG.
  • the swaging ring 15 which has an outer diameter smaller than the outer diameter of the rear inlet part 11b is moved forward by pressing the outer peripheral surface (surface) of the rear inlet part 11b to a predetermined pressure
  • a pulling force for pulling the outer circumferential surface side forward may be applied, and a predetermined deformation may be made in which the rear inlet portion 11b is lifted (rolled up) in the direction in which the outer diameter is expanded by the pulling force.
  • the rear inlet 11b can have a larger outer diameter than the middle 11a.
  • the rear inlet portion 11b can prevent the rear departure of the swage ring 15 by an outer diameter relatively larger than the middle portion 11a.
  • the rear introduction portion 11b has an annular groove 111 formed on its inner circumferential surface (see FIG. 3), and an outer circumferential surface portion corresponding to the groove 111 has an intermediate portion 11a.
  • a bead 112 may be formed to protrude outwardly to have a larger outer diameter.
  • both end surfaces of the outer body 11 in the longitudinal direction reach the state in which the fastening tool 2 abuts. And then a force for additionally moving the swaging ring 15 forward is applied by the movement of the fastening tool 2, the groove 111 formed to be recessed on the inner circumferential surface of the rear inlet portion 11b of the outer body 11. ) May be subjected to a compressive force in the axial direction (length direction). 4 and 5, the bead 112 is deformed to increase the outer diameter while being deformed to shorten the length of the rear inlet 11b when an axial direction (length direction) compressive force is applied to the rear inlet 11b.
  • the thickness of the portion where the groove 111 of the rear introduction portion 11b is formed is thinner than other portions due to the formation of the groove 111, and the groove 111 is recessed outward from the inner circumferential surface of the rear introduction portion 11b.
  • the groove 111 may be formed in an annular shape at a point spaced some distance from the rear end surface (rear end surface) of the rear inlet portion 11b.
  • the groove 111 may be formed over a portion of the rear end portion 113 of the rear introduction portion 11b and a portion of the inclined connection portion 114, but is not limited thereto.
  • the groove 111 may be deformed to protrude outward while the groove 111 is folded or distorted when the axial (longitudinal or longitudinal) compressive force is applied by the fastening tool. It may be desirable to be formed on the inner circumferential side of the rear inlet 11b and at the same time have a thickness thinner than other portions of the rear inlet 11b.
  • the inner circumferential surface of the intermediate portion 11a has an inner protrusion 116 contacting the first pipe 210 and the second pipe 220 during swaging of the swage ring 15. ) May be formed.
  • the intermediate part 11a may be plastically deformed in a direction in which the inner diameter and the outer diameter are reduced. Accordingly, the portion of the inner protrusion 116 formed on the inner circumferential surface of the intermediate portion 11a corresponding to the outer circumferential surface of the first pipe 210 contacts the outer circumferential surface of the first pipe 210 and the outer circumferential surface of the first pipe 20.
  • each of the first pipe 210 and the second pipe 220 may be deformed by the pressure of the inner protrusion 116. Accordingly, a portion of the inner protrusion 116 may be coupled to the second pipe 210 in the form of digging the outer circumferential surface of the first pipe 210. In addition, another portion of the inner protrusion 116 may be coupled to the second pipe 220 in the form of digging the outer circumferential surface of the second pipe 220.
  • the inner protrusion 116 may be formed with respect to the longitudinal direction so that the same or similar physical deformation or fastening may be made to each of the first pipe 210 and the second pipe 220. It is preferably formed in a symmetrical shape with respect to the center point between the first pipe 210 and the second pipe 220.
  • the inner protrusion 116 seals between the middle portion 11a and the first pipe 210 or between the middle portion 11a and the second pipe 220 and the first pipe 210 or the second pipe ( It may include a sealing protrusion that resists the axial force acting on the 220.
  • a plurality of inner protrusions 116 are provided so that some of the plurality of inner protrusions 116 pressurize the first pipe 210 and some of the second pipes 220 during swaging of the swaging ring 15. By pressing, it is possible to seal between the outer body 11 and the first pipe 210 and between the outer body 11 and the second pipe 220.
  • the sealing protrusion may be provided in an annular structure that extends continuously along the circumferential direction.
  • a plurality of sealing protrusions may be provided at intervals along the longitudinal direction.
  • the sealing protrusion may have gratings adjacent to the defect forming a closed area of the local area and resisting torsion together if a defect is present on the outer circumferential surface of the first pipe 210 or the second pipe 220. It may be a grid-like protrusion that is repeatedly arranged along the circumferential direction on the inner peripheral surface of the intermediate portion (11a).
  • the sealing protrusion may be provided to protrude in the form of a lattice.
  • the lattice shape may be provided as an axial symmetric structure, but is not limited thereto.
  • the grating protrusions which are sealing gratings, are closed (closed) of the local area by gratings adjacent to the defects when there are defects on the surfaces of the first pipe 210 and the second pipe 220.
  • the inner space may protrude in a lattice shape along the circumferential direction thereof.
  • each lattice acts as a sort of partition wall that partitions an area inside the lattice with an area outside the lattice, thereby providing a higher anti-leakage capability.
  • the sealing when the sealing is made in the form of a lattice, leakage from the defective portion can be limited to only a predetermined lattice area and further leakage to the outside of the lattice area can be blocked.
  • the lattice shape may serve to resist the torsion applied to the pipe as well as to resist the axial force applied to the pipe.
  • the inner protrusion 116 may include a torsion resistant protrusion that resists the torsion acting on the first pipe 210 or the second pipe 220.
  • the torsion resistant protrusion may have a knurled shape (spline).
  • the torsion resistant protrusion has a tooth form formed long in the longitudinal direction (continuously extending in the longitudinal direction) repeatedly arranged along the circumferential direction on the inner circumference of the outer body 11 (internal gear shape It may be provided as).
  • the inner protrusion 116 may be provided to have a tooth when looking at the inner circumference of the longitudinal cross-section of the outer body 11.
  • the torsion resistant protrusion may be provided to extend from the middle portion 11a of the outer body 11 to the rear inlet portion 11b or the front end portion 11c.
  • the torsion resistant protrusions By arranging the torsion resistant protrusions, a structure in which the torsion resistant protrusions more effectively resist the bending (bending) deformation moment applied to the pipe can be provided. Further, the torsion resistant protrusion may be applied in combination with the above-mentioned sealing protrusion.
  • the inner protrusion 116 may be formed in an annular shape having an oblique inclination (an acute angle of inclination of less than 90 degrees with respect to the axial direction of the pipe), or formed as a lattice protrusion as described above. It can serve as a torsion resistant protrusion. As such, the inner protrusion 116 may be provided in various forms in consideration of sealing, axial force resistance, torsion resistance, and the like.
  • the inner protrusion 116 may be configured to be integrally formed on the inner surface of the outer body 11.
  • the inner protrusion 116 may be implemented by inserting a ring-shaped part separately from the outer body 11.
  • both the inner surface of the outer body 11 and the outer surface of the pipe first pipe 210 or second pipe 220. Since the airtightness must be satisfied, it is preferable that the projections are formed on both the radially outer end and the inner end in the form of separately processed rings.
  • the strength and hardness of the ring-shaped part are higher than the strength and hardness of the outer body 11 and the first and second pipes 210 and 220. It can be set higher than the strength and hardness of. According to such a strength and hardness setting, the inner protrusion 116 can be made to penetrate deeper into the inner surface of the outer body and the outer surface of the pipe, thereby improving the airtightness and mechanical strength of the first pipe connecting device. It becomes possible.
  • the length of the outer body 11 may be set to a length that satisfies the minimum number of inner protrusions 116 that can withstand the axial external force on the pipe that is expected or actually acted upon in the pipe connection design. Since this is related to the structural strength of the inner protrusion 116 and the strength of the first pipe 210 and the second pipe 220, the material and shape of the inner protrusion 116, the first pipe 210 and the second pipe It is preferable to set differently according to each case and conditions based on the material, thickness, etc. of 220.
  • the length range in the axial direction in which the inner protrusion 116 is formed is the strength of the first pipe 210 and the second pipe 220. It may be additionally provided to reinforce, and in this case, the outer body 11 can secure a sufficient strength of the predetermined or more without excessively increasing its length.
  • the outer body 11 may be provided in the form of omitting the above-described inner protrusion 116 for UHP (Ultra High Purity) piping, which is required to use the insert ring 13, and very thin piping.
  • the insert ring 13 may be provided to form a sealing portion at a contact point between the outer circumferential surface of the insert ring 13 and the inner circumferential surface of the first pipe 210 (or the second pipe 220).
  • an inner circumferential surface of the inner circumferential surface of the middle portion 11a corresponding to the center of the outer body 11 restricts forward movement of the first pipe 210 and prevents rearward movement of the second pipe 220.
  • Restricting stopper 117 can be formed. Referring to FIG. 2, the stopper 117 may be formed on the inner circumference of the middle portion 11a of the outer body 11. The stopper 117 may limit the movement of the first pipe 210 and the rear of the second pipe 220. In other words, each of the first pipe 210 and the second pipe 220 may be inserted into the outer body 11 to a position in contact with the stopper 117.
  • the stopper 117 By arranging the stopper 117 at the center of the intermediate portion 11a, the symmetrical arrangement of the first pipe and the second pipe with respect to the outer body 11 may be facilitated.
  • the inner protrusion 116 described above may be symmetrically formed with respect to the stopper 117.
  • the stopper 117 may be provided in the same to or similar to the inner protrusion 116.
  • the stopper 117 may be configured to be integrally formed on the inner surface of the outer body 11.
  • the stopper 117 may be implemented in a form in which a ring-shaped part (eg, a C-type ring) processed separately from the outer body 11 is inserted into the outer body 11.
  • the stopper 117 is optionally provided in some cases Can be.
  • the inner circumferential surface of the swage ring 15 is formed such that the middle portion thereof has a constant inner diameter, and the front end taper portion 152 is formed at the front end portion thereof, and the rear end portion thereof at the rear end portion thereof. Tapered portion 151 may be formed.
  • the introduction of the swage ring 15 into the rear inlet 11b by the shear taper 152 can be made smoothly and easily.
  • some of the outer circumferential surface of the front end portion 11c by the front end taper 152 may be provided in a form in which the outer diameter is gradually secured in contact with the front end taper 152.
  • the frictional resistance due to the contact can be organically combined in the role of the limiting jaw of the front end 11c. That is, the front end portion 11c may serve as a limiting jaw that restricts the forward departure of the swage ring 15 by the outer diameter relatively larger than the middle portion 11a and the frictional resistance with the shear tapered portion 152. As described above, when the shear taper portion 152 is formed in the swage ring 15, a portion (shear taper portion) of the swage ring 15 also contacts the front end 11c of the outer body 11 as described above. Can be.
  • the swage ring 15 is pressed against the middle portion 11a of the outer body 11 to the inner circumferential surface having the largest inner diameter, and swaging, whereas a portion of the front end 11c of the outer body 11 is swung.
  • the swaging may be gradually relaxed by pressing the shear taper 152 whose inner diameter gradually expands toward the front.
  • the swage ring 15 may be provided in a single accessory form other than the portion where the front tapered portion 152 and the rear tapered portion 151 are formed.
  • the minimum thickness of the swage ring 15 is the maximum thickness before the plastic deformation of the first pipe 210 or the second pipe 220 and the maximum thickness before the plastic deformation of the middle portion 11a of the outer body 11. May be greater than the sum. This prevents the outer diameter of the swaging ring 15 from increasing in size more than the amount of decreasing inner diameter of the outer body 11 during the swaging process.
  • the compression force acts in the inward direction of the pipe 220 and is intended to be swaging.
  • the maximum thickness of the swage ring 15 is not particularly limited, but when the insert ring 13 is used, such as UHP piping, plastic deformation of the insert ring 13 should be avoided.
  • the maximum thickness is the thickness of the outer body 11 (such as the minimum thickness), the thickness of the first pipe 210 (or the thickness of the second pipe 220) and the thickness of the insert ring 13 (such as the insert The maximum thickness of the ring).
  • the outer body 11 and the swage ring 15 may be made of the same material as the first pipe 210 and the second pipe 220.
  • the insert ring 13 to be described later is also preferably made of the same material as the first pipe 210 and the second pipe 220. This is influenced by the surrounding environment of the first pipe 210 and the second pipe 220 such as temperature change, between the first pipe 210 and the outer body 11 and between the second pipe 220 and the outer body 11. This is to minimize the change in the physical bonding force between).
  • each of the outer circumferential surface of the outer body 11 and the inner circumferential surface of the swage ring 15 may be lubricated and coated with a lubricant or a material having good lubricity. This lowers the need to use unnecessarily strong fastening tools.
  • a material that is coated on the outer circumferential surface of the outer body 11 and the inner circumferential surface of the swage ring 15 for lubricating coating is applied to the first pipe 210 and the second pipe 220 to have a corrosion resistant surface treatment or less.
  • the outer body 11 and the swage ring 15 are corrosion resistant prior to lubrication coating to ensure corrosion resistance equal to or greater than that of the material of the pipes (first pipe 210 and second pipe 220). It is preferable to perform surface treatment first.
  • FIG. 6 is a schematic cross-sectional view of one embodiment of the present first pipe connection device including an insert ring
  • FIG. 7 is a swaging ring of one embodiment of the present first pipe connection device including an insert ring for rears swaging. It is a schematic sectional drawing for demonstrating introduction to an introduction part.
  • 8 is a schematic cross-sectional view of another embodiment of the present first pipe connection device including an insert ring
  • FIG. 9 is a swaging ring of another embodiment of the present first pipe connection device including an insert ring. Is a schematic cross-sectional view for explaining the introduction to the rear inlet.
  • the first pipe connection device may comprise an insert ring 13.
  • Insert ring 13 may complement the function of the outer body 11 can exhibit a variety of effects, it may be provided in various forms according to the desired effect. It demonstrates concretely below.
  • the insert ring 13 is provided longer than the outer body 11 (in particular, the middle portion 11a of the outer body 11), so that the first pipe 210 and the second pipe ( The inside of the 220 may be disposed at a position including the length section of the outer body 11 (the length section of the middle portion 11a of the outer body 11).
  • the insert ring 13 may support the inner circumferential surfaces of the first pipe 210 and the second pipe 220 when swaging the swage ring 15. Accordingly, the insert ring 13 can prevent the first pipe 210 and the second pipe 220 from being bent and deformed by the bending component external force.
  • the first pipe connecting device can be configured with a minimum length necessary to resist axial and torsional component external forces in order to pursue a simple and light configuration, by having an insert ring 13 supporting the pipe inside the pipe.
  • an insert ring 13 supporting the pipe inside the pipe.
  • the thickness of the first pipe 210 and the second pipe 220 is thin, it is to reinforce the mechanical strength of the connecting portion of the first pipe 210 and the second pipe 220 through the insert ring 13. More preferred.
  • the pipe (the first pipe 210 or the second pipe 220) may be connected to be disposed in such a manner that an end thereof is interposed between the outer body 11 and the insert ring. .
  • the outer circumferential surface of the insert ring 13 has an outer protrusion 131 contacting the first pipe 210 and the second pipe 220 when swaging the swage ring 15.
  • the outer protrusion 131 may be formed at a position corresponding to the inner protrusion 116 of the outer body 11 and the longitudinal direction (the longitudinal direction) of the pipe.
  • any one of the plurality of inner protrusions 116 is deformed by the swaging of the swage ring 15 to form a pipe (first pipe 210 or second pipe 220).
  • any one of the plurality of outer protrusions 131 may be configured to support the pipe against the pressure at a position corresponding to the one of the inner protrusions 116 of the inner circumferential surface of the pipe.
  • These outer protrusions 131 are continuously formed along the periphery (for example, annularly formed) to support the pipe, so that the pipe (first pipe 210 or second pipe 220) between the insert ring 13 Can be sealed. This sealing prevents foreign matter (contaminants), such as pipework residues, that may remain at the ends (cut surfaces) of the pipe (first pipe 210 or second pipe 220) from entering the space inside the pipe. It can be effectively applied to piping structures (semiconductor piping, etc.) where a fairly high level of internal cleanliness is required.
  • an engagement groove recessed inward with respect to the radial direction of the pipe may be formed in the middle of the outer protrusion 131 of the insert ring 13 along the circumferential direction.
  • the engagement groove may be engaged with at least a portion of the inner protruding portion of the pipe deformed inward by the pressing of the inner protrusion 116 of the outer body 11 during swaging.
  • the protrusions on both sides of the outer protrusion 131 may fix the pipe while digging both inner circumferential surfaces of the inner protrusion of the pipe.
  • the protrusions of the outer protrusions 131 and the engaging grooves are organically coupled with respect to the inner protrusions 116 of the outer body 11, so that the permanent fixing of the pipes by swaging becomes more cohesive, and the pipes and the outers are fixed.
  • the airtightness between the body 11 and the airtightness between the pipe and the insert ring 13 can be realized more completely.
  • the outer protrusion 131 of the insert ring 13 may be provided in a similar form to the inner protrusion 116 of the outer body 11 described above.
  • the outer protrusion 131 seals between the insert ring 13 and the first pipe 210 or between the insert ring 13 and the second pipe 220 and the first pipe 210 or the second pipe ( It may include a sealing protrusion that resists the axial force acting on the 220.
  • the outer protrusion 131 may include a torsion resistant protrusion that resists the torsion acting on the first pipe 210 or the second pipe 220.
  • the torsion resistant protrusion may be provided to partially protrude from the outer circumferential surface of the insert ring 13 to the front and rear of the outer body 11.
  • the first pipe 210 and the second pipe 220 may be bent and deformed by the bending component external force.
  • the bending resistance capability of the insert ring 13 against can be further improved.
  • the sealing protrusion may have the gratings adjacent to the defect forming a closed area of the local area and resisting the torsion together when a defect exists on the inner circumferential surface of the first pipe 210 or the second pipe 220. It may be a grid-like protrusion that is repeatedly arranged along the circumferential direction on the outer circumferential surface of the insert ring (13). Since the configuration of the outer protrusion 131 may be understood by applying the same description to the above-described description of the inner protrusion 116 of the outer body 11, the detailed description thereof will be omitted.
  • the inner circumferential surface of the insert ring 13 may be coated with a protective material to be protected from the material flowing in the first pipe 210 and the second pipe 220 as necessary.
  • a protective material for example, fluids, gases, etc. flowing inside the pipes (the first pipe 210 and the second pipe 220) can easily corrode the pipe, or the material (material) forming the pipe is eluted into the pipe.
  • Pipes may be installed under chemical conditions.
  • the insides of the first pipe 210 and the second pipe 220 may be coated with a protective material.
  • the insert ring 13 coated with the protective material is disposed inside the first pipe 210 and the second pipe 220, so that sealing between the cut surface of the pipe and the insert ring 13 can be solved. .
  • This first pipe connection device can be applied with various applications in applications requiring high cleanliness as well as airtightness, such as high clean gas piping (UHP piping) in industries such as semiconductor, bio, and pharmaceutical where clean rooms are used. have.
  • UHP piping high clean gas piping
  • the inner circumferential surface of the insert ring 13 can secure a level of smoothness equal to or higher than that of the pipes (the first pipe 210 and the second pipe 210) by electropolishing, etc., and is chemically stable and not contaminated. It may have a state.
  • the insert ring 13 may complement (reinforce) the outer body 11 through an effect such as structural strength reinforcement and chemical resistance reinforcement special environment.
  • the thickness of the insert ring 13 is preferably thin so as not to cause flow resistance of materials (fluid, gas, etc.) in the first pipe 210 and the second pipe 220, but the minimum mechanical strength according to the use. It is desirable to ensure the minimum thickness necessary to secure and maintain airtightness.
  • the thickness of the insert ring 13 is the first pipe 210 and the second pipe 220. It may be thicker than each thickness.
  • the insert ring 13 is preferably thicker than the first pipe 210 and the second pipe 220.
  • the first pipe connecting device may include a fastening tool 2.
  • the fastening tool 2 may be a temporary, temporary configuration in which the swage ring 15 is removed after fastening so as to surround the intermediate portion 11a.
  • the fastening tool 2 is in contact with the rear support unit 21 in contact with the rear end surface of the swage ring 15, and the front support unit in contact with the front end surface of the front end 11c of the outer body 11. (22).
  • the fastening tool 2 has the rear support unit 21 and the front support unit 22 mutually moved so that the swaging ring 15 is moved from the rear of the outer body 11 to the position surrounding the intermediate portion 11a.
  • It may include a driving unit for providing an axial compression force by the driving force and the driving force to move the drive force to move toward, for example, the rear support unit 21 relatively to the front support unit 22 side.
  • the drive unit can be moved relative to each other by pulling the rear support unit 21 relative to the front support unit 22. Since various driving devices such as a driving unit (actuator) using hydraulic pressure may be applied to the driving unit, a more detailed description thereof will be omitted.
  • the rear support unit 21 has a first ring contact circumferential surface 211 in contact with the rear end surface of the swage ring 15, and a first ring contact circumferential surface 211.
  • a first body contact recessed surface 212 may be formed to be recessed backward by the first step a and contact the rear end surface of the rear inlet portion 11b of the outer body 11.
  • the first step a may be set to correspond to the length of the rear inlet portion 11b that is shorter than before the formation of the bead 112 while the bead 112 is formed. Referring to the enlarged partial view of the left side of FIG.
  • the first step a is set so as to correspond to the length of the rear inlet part 11b, unlike the drawing, the rear end taper part 151 at the rear end of the swaging ring 15. If is not formed may be interpreted to mean that the size of the first step (a) is set equal to the length of the rear inlet (11b). However, when the rear end taper portion 151 is formed at the rear end of the swaging ring 15 as shown in the drawing, the first step a is set so as to correspond to the length of the rear inlet portion 11b. It may be interpreted that the size of adding the longitudinal length of the rear end taper portion 151 to the size of) is set equal to the length of the rear inlet portion 11b.
  • the front support unit 22 includes a second ring contact circumferential surface 221 and a second ring contact circumferential surface 221 in contact with the front end surface of the swage ring 15.
  • the second body contact recessed surface 222 may be formed to be recessed forward by the second step c and contact the front end surface of the front end 11c of the outer body 11.
  • the second step c may be set to correspond to the length of the front end 11c.
  • the second step c is set to correspond to the length of the front end 11c, unlike the drawing.
  • the shear taper 152 is disposed at the front end of the swaging ring 15.
  • the size of the second step (c) is set equal to the length of the front end (11c).
  • the shear taper 152 is formed at the front end of the swaging ring 15 as shown in the drawing, it is understood that the second step c is set to correspond to the length of the front end 11c. It may be interpreted that the size of adding the longitudinal length of the front end taper 152 to the size of) is set equal to the length of the front end 11c.
  • the rear inlet portion 11b and the front end 11c of the outer body 11 are not covered by the swage ring 15, and the outer body
  • the position of the swage ring 15 can be set so that the contact and pressure by the swage ring 15 are made only to the middle portion 11a of (11).
  • each of the longitudinal end surfaces of the outer body 11 may have a first body contact recessed surface 212 of the rear support unit 21 and a second body contact recessed surface of the anterior support unit 22.
  • the swage ring 15 In the state in contact with 222 (hereinafter referred to as 'first state'), the swage ring 15 has only the rear end face abutting the first ring contact circumferential surface 211 of the rear support unit 21 and , The front end face is still in contact with the second ring contact circumferential face (221) of the anterior support unit (22).
  • the outer body 11 in the first state, the outer body 11 is in a state in which both end faces are in contact with the fastening tool 2, but the swaging ring 15 has a front end face still spaced apart from the fastening tool 2 (b). It is in a state.
  • the groove 111 is formed so that the groove of the rear inlet portion 11b of the outer body 11 which is the thinnest portion thereof ( 111)
  • the forming of the bead 112 protruding outward may be induced.
  • the outer body 11 is provided to have an initial length that is longer by a predetermined size (b) than the length finally formed by compression by the fastening tool 2, and the swage ring 15 has an outer body.
  • the first step (a) and the second step (c) which is both sides step of the fastening tool 2 at the initial length of (11) and the length L R subtracted by the predetermined size (b)
  • the compressive force by the movement (movement from the state of FIG. 4 to the state of FIG. 5) by the preset size b may be applied to the outer body 11.
  • the first step (a) and the second step (c) of the fastening tool 2 serves to secure the rear section (rear inlet) and the front section (front end) where the swage ring 15 is not covered. can do.
  • the first step a may be performed alone or in combination with the rear end taper 151 of the swage ring 15 to secure a space in which the beads 112 are formed.
  • the first body contact recessed surface 212 of the rear support unit 21 may include the rear inlet portion 11b of the outer body 11. It may be formed with a width (diameter or radius) larger than the outer diameter of. Specifically, the first body contact recessed surface 212 may be provided to have a width such that the beads 112 protruding outward by compression do not interfere.
  • the outer body 11 is provided in the middle portion (11a) unlike the conventional structure and protruding to the outer surface, so that it can be produced with as little processing as possible from raw materials in the form of pipes Therefore, manufacturing cost can be greatly reduced.
  • the middle portion 11a of the outer body 11 is swissed as a whole, the same mechanical strength as in the prior art can be ensured even with a shorter body length than the conventional one.
  • the weight of the pipe joint and the fastening tool 2 by the first pipe connecting device can be reduced, and easy construction is possible even in a narrow space.
  • a friction configuration at a constant contact surface is provided between the swage ring and the outer body to prevent the swage ring from escaping from the outer body.
  • the front end 11a and the rear inlet 11b of the outer body 11 are naturally arranged with the swage ring 15 by swaging the swage ring 15.
  • the number of parts can be minimized and defects can be reduced, and unlike the conventional method, one tool operation (for example, conventionally, swaging the front and rear ends of the outer body) is performed. Although a tool motion was required, the first pipe connection device requires a single tool motion for the forward movement of the swaging ring 15) to connect the two pipes 210 and 220. Thus, the construction time can also have an advantage that can be significantly shortened by more than half.
  • the first pipe connection method shares the same or corresponding technical features and configurations as the above-described first pipe connection device. Therefore, descriptions overlapping with those described in the first pipe connection device will be briefly or omitted, and the same reference numerals will be used for the same or similar components.
  • This first pipe connection method relates to a method of interconnecting opposite ends of two pipes (210, 220).
  • the first pipe connection method includes preparing a tube for an outer body forming the outer body 11.
  • the tube for the outer body may have the above-described intermediate portion 11a, front end 11c and rear introduction portion 11b.
  • the outer body tube may have a groove 111, an inner protrusion 116, and a stopper 117.
  • the first pipe connection method includes inserting an end portion of the first pipe 210 into the outer body 11 from the rear and inserting an end portion of the second pipe 220 from the front of the outer body 11. Step 1).
  • the first pipe connection method includes the step (second step) of arranging the swage ring 15 to be located behind the outer body tube with respect to the outer circumferential surface of the first pipe 210.
  • the second step may be performed after the first step or, if necessary, may be performed before the first step.
  • the first pipe connection method also includes a step (third step) of placing the fastening tool 2.
  • the fastening tool 2 includes a rear support unit 21 in contact with the rear end face of the swage ring 15, and a front support unit 22 in contact with the front end face of the front end 11c of the outer body 11. It may include.
  • the fastening tool 2 may include a driving unit which provides the axial compression force by the driving force and the driving force to move the rear support unit 21 relatively to the front support unit 22 side.
  • the first pipe connection method also includes a step (fourth step) in which the swaging ring 15 performs swaging and surrounds (engages) the intermediate portion 11a of the outer body 11. .
  • the first pipe connecting method may include removing the fastening tool 2 after the fastening of the swage ring 15 to surround the intermediate portion 11a (a fifth step).
  • a pipe connecting device (hereinafter, referred to as 'the second pipe connecting device') according to the second embodiment of the present application will be described.
  • reference numerals used in the following description of the second pipe connecting apparatus may be understood as reference numerals corresponding to the reference numerals shown in FIGS. 10 to 14.
  • FIG. 10 is a schematic cross sectional view of the present second pipe connecting device
  • FIG. 11 is a schematic cross sectional view showing that the swaging ring of the present second pipe connecting device is introduced into the rear inlet for swaging
  • FIG. 10 is an enlarged view of A
  • FIG. 13 is a schematic conceptual cross-sectional view for explaining that the fastening protrusion of the second pipe connecting device is in contact with the first ring contact circumferential surface
  • FIG. It is a schematic conceptual sectional drawing for demonstrating that the fastening protrusion of a 2-pipe connection apparatus contacts a 1st ring contact peripheral surface.
  • FIG. 10 illustrates a state in which the fastening tool is not removed.
  • the present second pipe connecting device relates to a device for interconnecting opposite ends of two pipes 210, 220.
  • the second pipe connecting device includes an outer body 11.
  • the outer body 11 is configured such that an end portion of the first pipe 210 is inserted from the rear (9 o'clock based on FIG. 10) and an end portion of the second pipe 220 is inserted from the front (3 o'clock based on FIG. 10). to be.
  • the outer body 11 may be disposed in such a manner that a portion (a rear portion) of the rear inlet portion 11b and the middle portion 11a surrounds an end portion (front portion) of the first pipe 210. have.
  • the outer body 11 may be disposed in such a manner that a part (front part) of the front end 11c and the middle part 11a surrounds the end (rear end) of the second pipe 220.
  • the outer body 11 may be divided into a front end portion 11c, a middle portion 11a, and a rear inlet portion 11b along a longitudinal direction (3 o'clock to 9 o'clock based on FIG. 10).
  • the rear introduction portion 11b may mean a portion into which the swage ring 15 to be described later is introduced.
  • the middle portion 11a may mean a portion that is swissed by the swaging ring 15 to have a constant outer diameter, and may be an intermediate portion except for the rear inlet portion 11b and the front end portion 11c.
  • the front end 11c may basically include a portion where the swaging ring 15 does not reach and is not contacted.
  • the front end (11c) is in contact with the swage ring 15 is a predetermined swaging is made, but not swaging by the portion of the swage ring 15 having a constant smallest inner diameter, toward the front It may also include a portion in which swaging is gradually relaxed by a tapered portion so that the inner diameter is gradually increased.
  • the front end 11c is a front portion in which no maximum swaging is made by the portion having the minimum inner diameter of the swaging ring 15 (the front portion and the swaging ring in which a small swaging is relaxed than the maximum swaging are formed). Uncontacted to unreached front part).
  • the outer body 11 is configured to be in close contact (contact) with the outer circumferential surfaces of the first pipe 210 and the second pipe 220 which are pressed by the swage ring 15 to be described later, and positioned therein.
  • the first pipe 210 and the second pipe are mechanically prevented while preventing the leakage of materials inside the 210 and the second pipe 220 and the disengagement of the first pipe 210 and the second pipe 220. 220 may be connected.
  • the outer body 11 needs to have a mechanical strength equal to or higher than that of the first pipe 210 and the second pipe 220.
  • the second pipe connecting device includes a swage ring 15.
  • the initial inner diameter before swaging of the swage ring 15 may be smaller than the initial outer diameter before swaging of the outer body 11 (in particular, the middle portion 11a).
  • the swage ring 15 may be introduced from the rear inlet portion 11b and moved forward, and swaging the outer body 11.
  • the swage ring 15 contacts and presses the outer circumference of the outer body 11.
  • the contact and pressurization of the swage ring 15 to the outer body 11 is brought into contact with the rear inlet 11b and the swage ring 15 which are only in contact with the introduction of the swage ring 15 in the outer body 11. It can be made with respect to the intermediate portion 11a except for the front end 11c, which is not.
  • the front taper portion 152 of the swage ring 15 may also contact the front end 11c.
  • the portion of the front end 11c which is thus in contact with the shear tapered portion 152 is gradually along the increasingly expanding inner diameter of the shear tapered portion as compared to the swaging by the portion having the constant minimum inner diameter of the swage ring 15.
  • This can be said to be a part that swaging is relaxed.
  • the middle portion 11a may mean a portion where swaging is performed by a constant minimum inner diameter of the swaging ring 15, and the front end 11c is a front (front) portion of the middle portion 11a.
  • the swage ring 15 may include a portion that is not reached.
  • the swage ring 15 may include a portion where the shear taper portion swizzles. Accordingly, the swage ring 15 may have a length shorter than that of the outer body 11 to surround the outer circumference of the middle portion 11a of the outer body 11.
  • the outer body 11 may be in a state in which at least a part thereof is plastically deformed by swaging.
  • the middle portion 11a of the outer body 11 may be deformed in a direction in which the outer diameter is reduced by swaging.
  • the rear inlet portion 11b of the outer body 11 is deformed in a direction in which the outer diameter is reduced by swaging of the swage ring 15, and at least a portion of the outer body 11 is elastically passed after the swage ring 15 passes. It may be deformed or the outer peripheral surface side thereof may be pulled forward at least in part according to the movement of the swage ring 15 to be deformed in a direction in which the outer diameter becomes larger than the middle portion 11a.
  • At least a portion of the inner circumferential surface of the intermediate portion 11a is formed by swaging the swaging ring 15 which deforms the intermediate portion 11a in a direction of decreasing outer diameter.
  • the outer circumferential surface of the first pipe 210 and the outer circumferential surface of the second pipe 220 may be pressurized.
  • the movement of the swage ring 15 may be made by the fastening tool 2.
  • the fastening tool 2 may include a rear support unit 21 and a front end 11c of the outer body 11, which are in contact with the rear end surface of the swage ring 15.
  • the front support unit 21 is moved to the front support unit 21 so that the front support unit 22 and the swage ring 15 in contact with the front end face of the outer body 11 move to the position surrounding the middle portion 11a.
  • a fastening groove 111 is formed on an outer circumferential surface of the front end 11c of the outer body 11.
  • the swage ring 15 includes a front part 151 provided with a fastening protrusion 1513 that is obliquely protruded toward the front inward and fastened to the fastening groove 111. That is, according to the second pipe connection device, a restrained state in which the fastening protrusion 1513 is fastened to the fastening groove 111 may be implemented. This restrained state may refer to a state in which the rear movement of the swage ring 15 is prevented by the fastening protrusion 1513 and the fastening groove 111 fastened.
  • the swage ring 15 and the outer body 11 may be coupled such that the rearward movement of the swage ring 15 is limited. Therefore, it can be said that the front part 151 of the swage ring 15 is formed with a structure (fastening protrusion 1513) for coupling with the outer body 11.
  • the fastening protrusion 1513 protrudes obliquely toward the front inwardly, and the fastening protrusion 1513 protrudes toward the front of the swage ring 15 but obliquely toward the inside. It may mean extending.
  • the fastening protrusion 1513 may have an annular shape that is continuously formed along the circumferential direction, and the fastening groove 111 continuously extends along the circumferential direction corresponding to the annular fastening protrusion 1513. It may be a shape to be formed.
  • the fastening protrusion 1513 is deformed into a restrained state that is fastened to the fastening groove 111 in an initial state protruding so as not to interfere with the outer circumferential surface of the outer body 11 by the axial compressive force thereto.
  • the fastening protrusion 1513 has an initial state uninterrupted with respect to the outer circumferential surface of the outer body 11 before the axial compressive force is applied thereto and moves forward on the outer body of the swage ring 15. It may be moved forward and may be deformed to be fastened to the fastening groove 111 formed on the outer circumferential surface of the outer body 11 when the axial compressive force is applied.
  • the fastening protrusion 1513 when the fastening protrusion 1513 has an annular shape, the outer body 11 so that the minimum inner diameter of the initial state of the fastening protrusion 1513 does not interfere with the outer circumferential surface of the outer body 11 of the fastening protrusion 1513. It may be larger than the outer diameter of.
  • the axial compressive force can be applied by the fastening tool 2 described above.
  • the axial compressive force may mean a compressive force applied to the front and rear (vertical direction). Since the fastening protrusion 1513 protrudes forward, the axial compressive force may be a pressure applied to the rear so that the fastening protrusion 1513 is deformed while being compressed.
  • the lower surface of the front surface 151 of the front surface 151 is recessed surface 1512 recessed with a step toward the rear (9 o'clock based on FIGS. 13 and 14). This can be formed.
  • the fastening protrusion 1513 may be provided to protrude forward than the front end surface 1511 of the front portion 151 from the recessed surface 1512 in the initial state.
  • the front support unit 22 includes a front surface 151 of the front surface 151 and the fastening protrusion 1513 of the front portion 151 of the swaging ring 15 in a restrained state.
  • the first ring contact circumferential surface 221 may be formed to be in contact with the portion corresponding to the front end surface 1511.
  • the first ring contact circumferential surface 221 may limit the forward movement of the swage ring 15. In other words, the swage ring 15 may be moved until the shear surface 1511 is in full contact with the first ring contact circumferential surface 221.
  • the fastening protrusion 1513 is a position corresponding to the front end surface 1511 of the front portion 151 by the axial compression force on the portion projecting forward than the front end surface 1511 of the front portion 151 in the initial state. When pressed back until it can be provided in a shape that is induced to protrude and deform inward than the outer peripheral surface of the outer body (11).
  • the fastening protrusion 1513 of the initial state may protrude obliquely toward the front inward.
  • the fastening protrusion 1513 protrudes toward the front (3 o'clock reference in FIGS. 13 and 14) but obliquely toward the inner side (the 6 o'clock side in reference to FIGS. 13 and 14).
  • the fastening protrusion 1513 protrudes obliquely toward the front outer side (the direction side between the 12 o'clock and 3 o'clock directions in reference to FIGS. 13 and 14)
  • the fastening protrusion 1513 faces outward at the time of the back pressing.
  • the fastening protrusion 1513 of an initial state protrudes obliquely toward the front inner side (for example, it is protruded obliquely toward the front inner side at the time of the surface pressurization by the front support unit to the back inward rather than the outer peripheral surface of the outer body 11). It is preferred to be provided in)).
  • the swage ring 15 when the swaging ring 15 moves forward, the portion protruding forward of the front end surface 1511 of the fastening protrusion 1513 is located ahead of the front end surface 1511. And a first ring contact circumferential surface 221 of 22. 12, the swage ring 15 may be moved until the shear surface 1511 is in contact with the first ring contact circumferential surface 221, which is preceded by the shear surface 1511 in this movement process.
  • the fastening protrusion 1513 in contact with the first ring contact circumferential surface 221 may be pressed back to a position corresponding to the front end surface 1511 of the front portion 151, whereby the fastening protrusion 1513 is at least A part may be bent in a downward direction, a rear downward direction, or plastically deformed to deform (pressurize) the outer circumferential surface of the outer body 11.
  • the fastening protrusion 1513 may be deformed to protrude inwardly from the outer circumferential surface of the outer body 11. Accordingly, referring to FIG.
  • the fastening protrusion 1513 may be deformed to be fastened to the fastening groove 111 in a non-protruded form than the front end surface 1511 of the front part 151 in the restrained state. For reference, whether or not the non-protruded forward than the shear surface is projected slightly ahead of the shear surface in consideration of the error, deformation of the front support unit, etc., if it is within the error range considered in the design, it can be determined that the non-projected forward than the shear surface. will be.
  • the fastening groove 111 is a groove formed by pressing the outer circumferential surface of the front end of the outer body 11 while the fastening protrusion 1513 is deformed from an initial state to a restrained state. Can be.
  • the fastening protrusion 1513 may be deformed in the form of being pressed back and plastically deformed to press (press) the outer circumferential surface of the outer body 11.
  • the fastening groove 111 may be formed on the outer circumferential surface of the outer body 11. Accordingly, the fastening protrusion 1513 may be naturally engaged with and fastened to the fastening groove 111 formed by its pressing.
  • the fastening groove 111 may be a groove previously formed on the outer circumferential surface of the front end of the outer body 11 before swaging the swage ring 15. In this case, less external force may be required to fasten the fastening protrusion 1513 and the fastening groove 111.
  • the preformed groove may be previously formed on the outer circumferential surface of the outer body 11 before the fastening groove 111 and the fastening protrusion 1513 are fastened in consideration of the position, depth, and width of the fastening groove 111 in the restrained state. Can be.
  • the pre-formed groove may be previously formed only to guide the deformation of the fastening protrusion 1513 to be guided to the inside thereof, and may be expanded to have a greater depth, width, and the like in the restrained state.
  • the pre-formed groove is formed only to guide, it can be understood as a wide concept encompassing even the groove is formed to be wider or deeper as the fastening protrusion 1513 is inserted.
  • the outer circumferential surface of the outer body 11 is positioned between the front end surface 1511 and the recessed surface 1512 of the front portion 151 of the swage ring 15 in a restrained state. Can be formed on. Accordingly, when the front support unit 22 presses the fastening protrusion 1513 backward while contacting the front end surface 1511 of the swage ring 15, the fastening protrusion 1513 formed obliquely forward to the inside is inside. As it is naturally deformed, a part of the fastening groove 111 may be inserted to engage with the fastening groove 111.
  • the front support unit 22 has a first body contact recessed surface recessed forward than the first ring contact circumferential surface 221 so as to contact the front end surface of the front end 11c of the outer body 11 in a restrained state ( 222 may be formed.
  • the first body contact recessed surface 222 may include a front surface 151 of the front portion 151 of the swage ring 15 having a first ring contact circumferential surface 221 of the anterior support unit 22. When contacted with 1511, it may be recessed to contact the front end face of the front end 11c of the outer body 11. For example, referring to FIG.
  • the distance in the front-rear direction between the first ring contact circumferential surface 221 and the first body contact recessed surface 222 may correspond to the outer body ( It may be set to correspond to the length between the front end surface of the front end 11c of 11) and the front end of the fastening groove 111.
  • the front end 11c has a relatively outer diameter than the middle portion 11a.
  • the middle portion 11a of the outer body 11 does not reach the front end 11c.
  • Can be pressurized. Accordingly, the front end 11c of the outer body 11 may be in a state in which the outer diameter is relatively larger than the middle portion 11a of the outer body 11 having the reduced outer diameter.
  • the front end portion 11c may prevent the departure of the swaging ring 15 by an outer diameter relatively larger than the middle portion 11a.
  • the front end 11c naturally having a relatively large outer diameter compared to the middle portion 11a by the swaging method of pressing only the middle portion 11a of the outer body 11 of the present application is after swaging is completed.
  • the swaging ring 15 may serve as a limiting jaw (limiter) that restricts further advancement in the direction in which the swaging ring 15 has advanced.
  • the intermediate portion 11a is swung in the front end portion of the inner circumferential surface of the swage ring 15 by swaging the swage ring 15 to deform the intermediate portion 11a in a direction of decreasing outer diameter.
  • the shear tapered portion 152 may be formed to be in contact with a portion of the outer circumferential surface of the front end portion 11c having a larger outer diameter than the portion 11a.
  • the inner diameter of the shear tapered portion 152 may increase toward the front.
  • the introduction of the swage ring 15 into the rear inlet 11b by the shear taper 152 can be made smoothly and easily.
  • some of the outer circumferential surface of the front end portion 11c of the outer body 11 by the shear tapered portion 152 may be provided in a form in which the outer diameter gradually (expanded) in contact with the shear tapered portion 152. Therefore, in the role of the limiting jaw of the front end 11c, the frictional resistance due to the contact can be organically combined. That is, the front end portion 11c may serve as a limiting jaw that restricts the forward departure of the swage ring 15 by the outer diameter relatively larger than the middle portion 11a and the frictional resistance with the shear tapered portion 152.
  • a portion (shear taper portion) of the swage ring 15 also contacts the front end 11c of the outer body 11 as described above.
  • the swaging may be gradually relaxed by pressing the shear taper 152 whose inner diameter gradually expands toward the front.
  • the shear tapered portion 152 may be formed to connect between the front portion 151 and the middle portion formed to have a constant inner diameter in the swage ring 15.
  • the fastening protrusion 1513 is fastened with the fastening groove 111 formed on the outer circumferential surface of the front end 11c whose outer diameter is relatively larger than the middle portion 11a by swaging of the swaging ring 15 in the restrained state. It may be provided to be.
  • the swage ring 15 may include a middle portion formed to have a constant inner diameter, thereby acting and pressing a constant external force against the middle portion 11a of the outer body 11.
  • the inner diameter of the front part of the swage ring 15 (the front part of the shear taper 152) is before the movement of the swage ring 15 to the front (fastening by the fastening tool 2 starts).
  • the shear tapered portion 152 connected to the front portion of the swaging ring 15 is formed to be inclined to have an inner diameter that gradually decreases from the inner diameter corresponding to the outer diameter of the outer body 11 to the rear to enable the interference fit. Can be.
  • the inner diameter of the rear end of the front end taper 152 (the end portion connected to the middle portion of the swage ring) is set to be smaller than the outer diameter of the outer body 11, whereby the front end of the outer body 11 ( A part of 11c) may serve as a limiting jaw that causes frictional resistance and shear resistance with respect to the shear tapered portion 152.
  • the inner diameter of the rear end of the front taper portion 152 within the range set smaller than the outer diameter of the outer body 11, considering the mechanical coupling requirements of the pipe connecting device and the manufacturing tolerances of the pipe (pipe) is appropriate. It is preferable to determine by numerical value.
  • a rear end taper may be formed at the rear end of the inner circumferential surface of the swage ring 15.
  • the rear end taper may have a shape in which the inner diameter increases toward the rear side.
  • the rear inlet portion 11b of the outer body 11 is deformed in a direction in which the outer diameter is reduced by swaging of the swage ring 15, and at least a part thereof after the swage ring 15 passes. It may be elastically deformed or its outer circumferential surface side may be pulled forward at least in part according to the movement of the swaging ring 15 to be deformed in a direction in which the outer diameter becomes larger than the middle portion 11a.
  • the rear end taper portion is in contact with a part of the rear inlet portion 11b whose outer diameter is relatively larger than the middle portion 11a of the outer body 11, so that the rear inlet portion 11b moves backward of the swage ring 15.
  • the rear inlet portion 11b of the outer body 11 may serve as a limiting jaw that limits the rearward movement of the swage ring 15 as the outer diameter becomes larger than the middle portion 11a.
  • resistance by friction with the rear end taper portion may be organically combined to act more strongly as a limiting jaw.
  • the inner circumferential surface of the front end portion 11c of the outer body 11 protrudes inward to maintain a relatively larger outer diameter than the middle portion 11a.
  • the front end support member 1191 may be provided. According to this front end support member 1191, the influence of deformation in which the outer diameter of the outer body 11 is reduced by swaging by the swage ring 15 is applied to the front end 11c of the outer body 11. Can be further minimized. 12 to 14, at least a portion of the front end support member 1191 may be provided between the front end taper 152 and the front end surface of the outer body 11.
  • the outer body 11 and the swage ring 15 may be made of the same material as the first pipe 210 and the second pipe 220. This is influenced by the surrounding environment of the first pipe 210 and the second pipe 220 such as temperature change, between the first pipe 210 and the outer body 11 and between the second pipe 220 and the outer body 11. This is to minimize the change in the physical bonding force between).
  • a metal having the same material as that of the first pipe 210 and the second pipe 220 is used in the outer body 11 and the swage ring 15, potential corrosion due to a potential difference between metals in contact with each other may be minimized. There is also an advantage.
  • each of the outer circumferential surface of the outer body 11 and the inner circumferential surface of the swage ring 15 may be lubricated and coated with a lubricant or a material having good lubricity. This lowers the need to use unnecessarily strong fastening tools.
  • a material that is coated on the outer circumferential surface of the outer body 11 and the inner circumferential surface of the swage ring 15 for lubricating coating is applied to the first pipe 210 and the second pipe 220 to have a corrosion resistant surface treatment or less.
  • the outer body 11 and the swage ring 15 are corrosion resistant prior to lubrication coating to ensure corrosion resistance equal to or greater than that of the material of the pipes (first pipe 210 and second pipe 220). It is preferable to perform surface treatment first.
  • the inner circumferential surface of the outer body 11 has an inner protrusion 116 contacting the first pipe 210 and the second pipe 220 during swaging of the swage ring 15. ) May be formed.
  • the outer body 11 may be plastically deformed in a direction in which the inner diameter and the outer diameter are reduced. Accordingly, a portion of the inner protrusion 116 formed on the inner circumferential surface of the outer body 11, corresponding to the outer circumferential surface of the first pipe 210, contacts the outer circumferential surface of the first pipe 210 and the outer circumferential surface of the first pipe 20.
  • each of the first pipe 210 and the second pipe 220 may be deformed by the pressure of the inner protrusion 116. Accordingly, a portion of the inner protrusion 116 may be coupled to the first pipe 210 in the form of digging the outer circumferential surface of the first pipe 210. In addition, another portion of the inner protrusion 116 may be coupled to the second pipe 220 in the form of digging the outer circumferential surface of the second pipe 220.
  • the minimum inner diameter of the inner protrusion 116 is the maximum outer diameter in consideration of the manufacturing tolerances of the first pipe 210 and the second pipe 220, taking into account the tolerances of the first pipe 210 and the second pipe 220. It is desirable to have a larger value.
  • the inner protrusion 116 may be formed with respect to the length direction so that the same or similar physical deformation or fastening may be made to each of the first pipe 210 and the second pipe 220. It is preferably formed in a symmetrical shape with respect to the center point between the first pipe 210 and the second pipe 220.
  • the inner protrusion 116 seals between the middle portion 11a and the first pipe 210 or between the middle portion 11a and the second pipe 220 and the first pipe 210 or the second pipe 220. It may include a sealing projection that resists the axial force acting on).
  • a plurality of inner protrusions 116 are provided so that some of the plurality of inner protrusions 116 pressurize the first pipe 210 and some of the second pipes 220 during swaging of the swaging ring 15. By pressing, it is possible to seal between the outer body 11 and the first pipe 210 and between the outer body 11 and the second pipe 220.
  • the sealing protrusion may be provided in an annular structure that extends continuously along the circumferential direction.
  • a plurality of sealing protrusions may be provided at intervals along the longitudinal direction.
  • the sealing protrusion may have gratings adjacent to the defect forming a closed area of the local area and resisting torsion together if a defect is present on the outer circumferential surface of the first pipe 210 or the second pipe 220. It may be a grid-like protrusion that is repeatedly arranged along the circumferential direction on the inner peripheral surface of the intermediate portion (11a).
  • the sealing protrusion may be provided to protrude in the form of a lattice.
  • the lattice shape may be provided as an axial symmetric structure, but is not limited thereto.
  • the grating protrusions which are sealing gratings, are closed (closed) of the local area by gratings adjacent to the defects when there are defects on the surfaces of the first pipe 210 and the second pipe 220.
  • the inner space may protrude in a lattice shape along the circumferential direction thereof.
  • each lattice acts as a sort of partition wall that partitions an area inside the lattice with an area outside the lattice, thereby providing a higher anti-leakage capability.
  • the sealing when the sealing is made in the form of a lattice, leakage from the defective portion can be limited to only a predetermined lattice area and further leakage to the outside of the lattice area can be blocked.
  • the lattice shape may serve to resist the torsion applied to the pipe as well as to resist the axial force applied to the pipe.
  • the inner protrusion 116 may include a torsion resistant protrusion that resists the torsion acting on the first pipe 210 or the second pipe 220.
  • the torsion resistant protrusion may have a knurled shape (spline).
  • the torsion resistant protrusion has a tooth form formed long in the longitudinal direction (continuously extending in the longitudinal direction) repeatedly arranged along the circumferential direction on the inner circumference of the outer body 11 (internal gear shape It may be provided as).
  • the inner protrusion 116 may be provided to have a tooth when looking at the inner circumference of the longitudinal cross-section of the outer body 11.
  • the torsion resistant protrusion may be provided to extend from the middle portion 11a of the outer body 11 to the rear inlet portion 11b or the front end portion 11c.
  • the torsion resistant protrusions By arranging the torsion resistant protrusions, a structure in which the torsion resistant protrusions more effectively resist the bending (bending) deformation moment applied to the pipe can be provided. Further, the torsion resistant protrusion may be applied in combination with the above-mentioned sealing protrusion.
  • the inner protrusion 116 may be formed in an annular shape having an oblique inclination (an acute angle of inclination of less than 90 degrees with respect to the axial direction of the pipe), or formed as a lattice protrusion as described above. It can serve as a torsion resistant protrusion. As such, the inner protrusion 116 may be provided in various forms in consideration of sealing, axial force resistance, torsion resistance, and the like.
  • the inner protrusion 116 may be configured to be integrally formed on the inner surface of the outer body 11.
  • the inner protrusion 116 may be implemented by inserting a ring-shaped part separately from the outer body 11.
  • both the inner surface of the outer body 11 and the outer surface of the pipe first pipe 210 or second pipe 220. Since the airtightness must be satisfied, it is preferable that the projections are formed on both the radially outer end and the inner end in the form of separately processed rings.
  • the strength and hardness of the ring-shaped part are higher than the strength and hardness of the outer body 11 and the first and second pipes 210 and 220. It can be set higher than the strength and hardness of. According to such strength and hardness setting, the inner protrusion 116 can be formed to penetrate deeper into the inner surface of the outer body and the outer surface of the pipe, so that the airtightness and mechanical strength of the second pipe connecting device can be further increased. Will be.
  • the length of the outer body 11 may be set to a length that satisfies the minimum number of inner protrusions 116 that can withstand the axial external force on the pipe that is expected or actually acted upon in the pipe connection design. Since this is related to the structural strength of the inner protrusion 116 and the strength of the first pipe 210 and the second pipe 220, the material and shape of the inner protrusion 116, the first pipe 210 and the second pipe It is preferable to set differently according to each case and conditions based on the material, thickness, etc. of 220.
  • an inner circumferential surface of the inner circumferential surface of the middle portion 11a corresponding to the center of the outer body 11 restricts forward movement of the first pipe 210 and prevents rearward movement of the second pipe 220.
  • a limiting stopper (not shown) may be formed.
  • the stopper may be formed on the inner circumference of the middle portion 11a of the outer body 11.
  • the stopper may limit movement forward of the first pipe 210 and movement backward of the second pipe 220.
  • each of the first pipe 210 and the second pipe 220 may be inserted into the outer body 11 to a position in contact with the stopper.
  • the inner protrusion 116 described above may be formed symmetrically with respect to this stopper.
  • the stopper may be provided similarly to the same as the inner protrusion 116.
  • the stopper may be configured to be integrally formed on the inner surface of the outer body 11.
  • the stopper may be implemented in a form in which a ring-shaped accessory (for example, a C-shaped ring) processed separately from the outer body 11 is inserted into the outer body 11.
  • the stopper may be optionally provided in some cases.
  • the second pipe connecting device may include the above-described fastening tool 2.
  • the fastening tool 2 may be a temporary, temporary configuration in which the swage ring 15 is removed after fastening so as to surround the intermediate portion 11a.
  • the fastening tool 2 may comprise a rear support unit 21, an anterior support unit 22 and a drive unit.
  • the drive unit can be moved relative to each other by pulling the rear support unit 21 relative to the front support unit 22. Since various driving devices such as a driving unit (actuator) using hydraulic pressure may be applied to the driving unit, a more detailed description thereof will be omitted.
  • the rear support unit 21 has a second contact circumferential surface 211 in contact with the rear end surface of the swage ring 15, and a rearward contact with the second contact circumferential surface 211.
  • a second body contact recessed surface 212 may be formed to be recessed and to contact the rear end surface of the rear inlet portion 11b of the outer body 11.
  • the depression amount (step amount) of the second body contact depression surface 212 may be set in the same manner, that is, to correspond to the length of the rear inlet portion 11b.
  • the depression amount (step amount) of the second body contact depression surface 212 is set to be shorter than the length of the rear inlet portion (11b), so that as much as the difference between the length of the depression (step amount) and the rear introduction portion (11b).
  • a bead may be formed to limit the rearward movement of the swage ring 15 by this protruding deformation.
  • a groove for inducing beads to be recessed outward may be formed in the inner circumferential surface of the rear inlet 11b. That is, according to the bead guide groove formed on the inner circumferential surface of the rear inlet portion 11b, when the rear inlet portion 11b is compressed, deformation in a direction in which a part thereof protrudes outward can be induced more naturally.
  • the outer body 11 is provided in the intermediate portion 11a without a structure and an outer protrusion protruding to the outer surface unlike the prior art, it can be produced with as little processing and material amount as possible from raw materials in the form of pipes. Therefore, manufacturing cost can be greatly reduced.
  • the mechanical coupling of the swage ring 15 and the outer body 11 may be made by plastic deformation of the fastening protrusion 1513, the friction coupling structure or member between the conventional swage ring and the outer body 11 may be used.
  • the elastic deformation configuration of the sewage ring can be ensured a high departure stopping force compared to the way to prevent the departure from the outer body. Accordingly, in the pipe connecting device, greater mechanical coupling performance against vibration and shock can be ensured.
  • the function of the protrusion of the middle portion 11a of the conventional outer body is unnecessary.
  • the length of the outer body 11 can be reduced compared to the conventional outer body, it is possible to greatly reduce the weight and construction in a narrower space.
  • a pipe connection method (hereinafter, referred to as 'the second pipe connection method') according to the second embodiment of the present application will be described.
  • the second pipe connecting method shares the same or corresponding technical features and configurations as the above-described second pipe connecting device. Therefore, descriptions overlapping with those described in the second pipe connection device will be briefly or omitted, and the same reference numerals will be used for similar or identical configurations.
  • This second pipe connection method relates to a method of interconnecting opposite ends of two pipes (210, 220).
  • the second pipe connection method includes preparing a tube for an outer body forming the outer body 11.
  • the tube for the outer body may have the above-described intermediate portion 11a, front end 11c and rear introduction portion 11b.
  • the tube for the outer body may have an inner protrusion 116 and a stopper.
  • the second pipe connection method includes inserting an end of the first pipe 210 into the outer body 11 from the rear and inserting an end of the second pipe 220 from the front of the outer body 11. Step 1).
  • the second pipe connection method includes the step (second step) of arranging the swage ring 15 to be located behind the outer body tube with respect to the outer circumferential surface of the first pipe 210.
  • the second step may be performed after the first step or, if necessary, may be performed before the first step.
  • the second pipe connection method also includes a step (third step) of placing the fastening tool 2.
  • the fastening tool 2 includes a rear support unit 21 in contact with the rear end face of the swage ring 15, and a front support unit 22 in contact with the front end face of the front end 11c of the outer body 11. It may include.
  • the fastening tool 2 may include a driving unit which provides the axial compression force by the driving force and the driving force to move the rear support unit 21 relatively to the front support unit 22 side.
  • the second pipe connection method also includes a step (fourth step) in which the swaging ring 15 performs swaging and surrounds (engages) the middle portion 11a of the outer body 11. .
  • the fourth step the locking groove 111 of the outer body 11 and the locking protrusion 1513 of the swage ring 15 are brought into a restrained state.
  • the fastening groove 111 may be a groove previously formed before the fourth step, or may be a groove formed by the deformation of the fastening protrusion 1513 in the fourth step.
  • the second pipe connection method may include removing the fastening tool 2 (fifth step) after fastening the swage ring 15 to surround the intermediate portion 11a.
  • a pipe connecting device (hereinafter referred to as 'the third pipe connecting device') according to the third embodiment of the present application will be described.
  • reference numerals used in the following description of the third pipe connecting apparatus may be understood as reference numerals corresponding to the reference numerals shown in FIGS. 15 to 20.
  • FIG. 15 is a schematic cross sectional view of the present third pipe connecting device
  • FIG. 16 is a schematic cross sectional view showing that the swaging ring of the present third pipe connecting device is introduced into the rear inlet for swaging
  • FIG. It is an enlarged view of 15A.
  • it is preferred to understand the description herein in consideration of at least some of the plastic deformation caused by swaging in the figures herein, which may be simplified or omitted.
  • the third pipe connecting device relates to a device for interconnecting opposite ends of two pipes 210, 220.
  • the third pipe connecting device includes an outer body 11.
  • the outer body 11 is configured such that an end portion of the first pipe 210 is inserted from the rear (9 o'clock based on FIG. 15) and an end portion of the second pipe 220 is inserted from the front (3 o'clock based on FIG. 15). to be.
  • the outer body 11 may be disposed in a form in which the rear part 11b surrounds an end (front end) of the first pipe 210.
  • the outer body 11 may be disposed in a form in which the front part 11c surrounds an end (rear end) of the second pipe 220.
  • the outer body 11 may be divided into a front part 11c and a rear part 11b along a longitudinal direction (3 o'clock to 9 o'clock based on FIG. 15).
  • front part 11c and the rear part 11b of the outer body 11 may be symmetrical about the space between them.
  • between the front part 11c and the rear part 11b may mean, for example, a center portion of the outer body 11 or between the first pipe 210 and the second pipe 220. Can be. Since the front part 11c and the rear part 11b are symmetrical with each other, in the description of the third pipe connecting device, even if there is no further detailed description of the front part 11c, the configuration, operation, Effects and the like can be understood to be the same as or similar to the rear part 11b.
  • the rear part 11b of the outer body 11 may be divided into a front end 11b-3, a middle part 11b-1, and a rear inlet part 11b-2.
  • the rear introduction portion (11b-2) may mean a portion where the swage ring 15 to be described later is introduced.
  • the middle portion 11b-1 may mean a portion that is swissed by the swaging ring 15 to have a constant outer diameter, and the middle portion 11b-1 is the rear inlet portion 11b-2 and the front end portion. It may be an intermediate portion except for (11b-3).
  • the front end 11b-3 may basically include a portion where the swaging ring 15 does not reach and is not contacted.
  • the front end (11b-3) is in contact with the swage ring (15) to make a predetermined swaging, not swaging by the portion of the swage ring (15) having the smallest constant inner diameter, the front
  • the swaging may be gradually relaxed by tapered portions so that the inner diameter gradually increases. That is, the front end 11b-3 is the front portion where the maximum swaging is not made by the portion having the minimum inner diameter of the swaging ring 15 (the front portion and the swaging in which the small swaging is relaxed rather than the maximum swaging). The front part of which the ring is uncontacted to unreached).
  • the front part 11c of the outer body 11 is symmetrical with the rear part 11b described above, and the rear end 11c-3, the middle part 11c-1 and the front inlet part ( 11c-2).
  • the rear end 11c-3, the middle portion 11c-1 and the front introduction portion 11c-2 each have a front end 11b-3, an intermediate portion 11b-1 and a rear introduction portion (11) of the rear part 11b. 11b-2)
  • a configuration symmetrical with each other it may have the same to similar configuration and effect, detailed description thereof will be omitted.
  • the outer body 11 is pressurized by a swage ring 15 and another swage ring 16 to be described later, and the first pipe 210 and the second pipe 220 positioned therein.
  • the first pipe 210 and the second pipe 220 may be connected to each other mechanically.
  • the outer body 11 needs to have a mechanical strength equal to or higher than that of the first pipe 210 and the second pipe 220.
  • the third pipe connecting device includes a swage ring 15.
  • the initial inner diameter before swaging of the swaging ring 15 may be smaller than the initial outer diameter before swaging of the outer body 11 (in particular, the middle portion 11b-1 of the rear part 11b).
  • the swage ring 15 may be introduced from the rear inlet portion 11b-2 and moved forward, and swaging the rear part 11b of the outer body 11.
  • the swage ring 15 contacts and presses the outer circumference of the rear part 11b of the outer body 11.
  • the contact and pressurization of the swage ring 15 to the rear part 11b is such that the rear inlet part 11b-2 and the swage ring 15 which contact only upon introduction of the swage ring 15 out of the rear part 11b. This can be done with respect to the intermediate portion 11b-1 except for the front end 11b-3 which is not in contact.
  • the shear taper portion 152 to be described later is formed in the swage ring 15, the front taper portion 152 of the swage ring 15 may also contact the front end 11b-3.
  • the portion of the front end 11b-3 of the rear part 11b which is thus in contact with the shear tapered portion is gradually expanded in the shear tapered portion in contrast to the swaging by the portion having the constant minimum inner diameter of the swage ring 15. It can be said that the swaging is gradually relaxed along the inner diameter. That is, the middle portion 11b-1 of the rear part 11b may mean a portion where swaging is performed by a constant minimum inner diameter of the swage ring 15, and the front end 11b-of the rear part 11b is formed.
  • the swage ring 15 basically includes a portion where the swage ring 15 is not reached as a front (front) portion of the intermediate portion 11b-1, and the shear taper portion when the swage ring 15 has a shear taper portion. It can even include swabbing. Accordingly, referring to FIG. 15, the swage ring 15 is shorter than the rear part 11b of the outer body 11 to surround the outer circumference of the middle portion 11b-1 of the rear part 11b. It can be cheap.
  • the rear part 11b of the outer body 11 may be in a plastically deformed state by swaging.
  • the middle portion 11b-1 of the rear part 11b may be deformed in a direction in which the outer diameter is reduced by swaging.
  • the rear inlet portion 11b-2 of the rear part 11b is deformed in a direction in which the outer diameter is reduced by swaging of the swage ring 15, and at least partially burned after the swage ring 15 passes.
  • the outer peripheral surface side may be deformed to be sexually deformed, or the outer circumferential surface side thereof may be pulled forward at least in part according to the movement of the swage ring 15 to be deformed in a direction in which the outer diameter becomes larger than the middle portion 11b-1.
  • the third pipe connecting device surrounds and contacts and presses the outer circumference of the front part 11c of the outer body 11, and the swage ring 15 around the rear part 11b and the front part 11c.
  • other swaging rings 16 provided symmetrically.
  • the rear part 11b and the front part 11c is to refer to the center part of the outer body 11 or between the first pipe 210 and the second pipe 220 by way of example. Can be.
  • the swage ring 15 corresponding to the reference numeral 15 corresponds to the first swage ring and the reference numeral 16.
  • Another swaging ring 16 may also be referred to as a second swaging ring.
  • the other swage ring 16 (the second swage ring 16) provided in the front part 11c is configured to be symmetrical with the swage ring 15 (the first swage ring 15)
  • the other swaging ring 16 provided in the front part 11c may be used.
  • the configuration, operation, effects and the like can be understood to be the same or similar to the swage ring 15 provided in the rear part (11b).
  • the rear portion 161, the rear end surface 1611, the fastening protrusion 1613, the rear end taper portion 162, etc. of the other swage ring 16 may be the front portion 151 of the swage ring 15,
  • the front face 1511, the fastening protrusion 1513, the shear tapered portion 152 and the like can be understood to be similar.
  • the contact and pressurization of the other swage ring 16 to the front part 11c may be symmetric to the contact and pressurization of the swage ring 15 to the rear part 11b of the front part 11c.
  • the rear end taper portion 162 is formed on the other swage ring 15 to be described later, are also the same as the case where the swage ring 15 has the front taper portion 152 formed thereon.
  • the deformation by the swaging of the front part 11c of the outer body 11 may also be understood to be the same as or similar to the deformation by the swaging of the front part 11b of the outer body 11 (for example.
  • the middle portion 11c-1 of the front part 11c may be deformed in a direction in which the outer diameter is reduced by swaging, and the front introduction portion 11c-2 of the front part 11c may have another swage ring 16.
  • at least a portion thereof may be plastically deformed in the same or similar manner as the deformation of the front part 11b.
  • the middle part 11b-2 by swaging the swage ring 15 which deforms the middle part 11b-2 of the rear part 11b in the direction which reduces outer diameter. At least a portion of the inner circumferential surface of) may press the outer circumferential surface of the first pipe 210.
  • the other swaging ring 16 which deforms the middle portion 11c-2 of the front part 11c in the direction of decreasing outer diameter, at least a part of the inner circumferential surface of the middle portion 11c-2
  • the outer circumferential surface of the second pipe 220 may be pressurized.
  • a fastening groove 111 is formed on the outer circumferential surface of the front end 11b-3 of the rear part 11b.
  • the swage ring 15 includes a front part 151 provided with a fastening protrusion 1513 that is obliquely protruded toward the front inward and fastened to the fastening groove 111. That is, according to the third pipe connection device, a restrained state in which the fastening protrusion 1513 is fastened to the fastening groove 111 may be implemented.
  • the fastening protrusion 1513 protruding obliquely toward the front inner side may mean that the fastening protrusion 1513 protrudes toward the front of the swage ring 15 but is obliquely extending toward the inner side.
  • the restrained state may refer to a state in which the rear movement of the swage ring 15 is prevented by the fastening protrusion 1513 and the fastening groove 111 fastened.
  • the swage ring 15 and the outer body 11 may be coupled such that the rearward movement of the swage ring 15 is limited. Therefore, it can be said that the front part 151 of the swage ring 15 is formed with a structure (fastening protrusion 1513) for coupling with the outer body 11.
  • the fastening protrusion 1513 may have an annular shape that is continuously formed along the circumferential direction, and the fastening groove 111 continuously extends along the circumferential direction corresponding to the annular fastening protrusion 1513. It may be a shape to be formed.
  • a fastening groove 111 is formed on the outer circumferential surface of the rear end 11c-3 of the front part 11c corresponding to the fastening protrusion 1613 of the other swaging ring 16.
  • the engagement of the fastening protrusion 1613 of the other swage ring 16 provided with respect to the front part 11c and the fastening groove 111 of the front part 11c is a swage ring provided with respect to the rear part 11b ( Since the coupling protrusion 1513 and the coupling groove 111 of the rear part 11b of the coupling part 15 have similar configurations, functions, and effects, detailed description thereof will be omitted.
  • the fastening protrusion 1513 is deformed into a restrained state that is fastened to the fastening groove 111 in an initial state protruding so as not to interfere with the outer circumferential surface of the outer body 11 by the axial compressive force thereto.
  • the fastening protrusion 1513 has an initial state uninterfered with respect to the outer circumferential surface of the outer body 11 before the axial compression force is applied thereto and moves forward according to the movement of the swaging ring 15 forward.
  • the axial compressive force When the axial compressive force is applied, it may be modified to be fastened to the fastening groove 111 formed on the outer circumferential surface of the outer body 11.
  • the fastening protrusion 1513 when the fastening protrusion 1513 has an annular shape, the outer body 11 so that the minimum inner diameter of the initial state of the fastening protrusion 1513 does not interfere with the outer circumferential surface of the outer body 11 of the fastening protrusion 1513. It may be larger than the outer diameter of.
  • the axial compressive force may mean a compressive force applied to the front and rear (vertical direction). Since the fastening protrusion 1513 protrudes forward, the axial compressive force may be a pressure applied to the rear so that the fastening protrusion 1513 is deformed while being compressed.
  • a recessed surface 1512 recessed with a step in the rear may be formed under the front end surface 1511 of the front portion 151.
  • the fastening protrusion 1513 may be provided to protrude forward than the front end surface 1511 of the front portion 151 from the recessed surface 1512 in the initial state.
  • the fastening protrusion 1513 is a position corresponding to the front end surface 1511 of the front portion 151 by the axial compression force on the portion projecting forward than the front end surface 1511 of the front portion 151 in the initial state. When pressed back until it can be provided in a shape that is induced to protrude and deform inward than the outer peripheral surface of the outer body (11).
  • the fastening protrusion 1513 of the initial state may protrude obliquely toward the front inward. This may mean that the fastening protrusion 1513 protrudes toward the front but is formed obliquely toward the inside. If the fastening protrusion 1513 protrudes obliquely toward the front outside, the fastening protrusion 1513 may be guided to be deformed toward the outside at the time of the back pressing and may not be fastened to the fastening groove 111.
  • the fastening protrusion 1513 of the initial state is provided in a shape (for example, a shape protruding obliquely toward the front inward) to be induced to protrude and deform inwardly from the outer circumferential surface of the outer body 11 at the time of the back pressing. desirable.
  • the swage ring 15 may be an object (eg, another swage ring or anterior side of which the front face 1513 is located in front of the swage ring 15). It may be a support unit, which may be moved forward until it comes into contact with it.
  • the portion protruding forward than the front end surface 1511 of the fastening protrusion 1513 may contact the object before the front end surface 1511, and the shaft is formed on the protruding portion of the fastening protrusion 1513.
  • Directional compressive force may be applied to press the back to the position corresponding to the front end surface 1511 of the front portion 151, so that the fastening protrusion 1513 at least partially bent or fired in the lower direction, rear lower direction, etc. It may be deformed to be deformed to pierce (pressurize) the outer circumferential surface of the outer body 11.
  • the fastening protrusion 1513 may be deformed to protrude inwardly from the outer circumferential surface of the outer body 11 by the back pressing by the object. Accordingly, referring to FIG. 17, the fastening protrusion 1513 may be deformed so as to be fastened to the fastening groove 111 in a form that is not protruded forward than the front end surface 1511 of the front part 151 in a restrained state. For reference, whether or not the non-extruded forward than the shear surface may be determined to be non-extruded forward than the shear surface, even if slightly protruded forward than the shear surface in consideration of the error, deformation of the object.
  • the front face 1511 of the swage ring 15 is in contact with the rear end face 1611 of the other swage ring 16 in a restrained state, and the fastening protrusion of the swage ring 15 ( 1513 may be in contact with engagement protrusion 1613 of another swaging ring 16 in a restrained state.
  • the swage ring 15 may be moved to a position where its front face 1511 may be in full contact with the rear face 1611 of the other swage ring 16.
  • the swage ring 15 is moved until its front face 1511 is in contact with the anterior support unit so that the rear end face of the other swage ring 16 is present. It may be moved to a position where it may be in full contact with 1611. At this time, after the swaging ring 15 is moved to the position, the other swaging ring 16 is next until the rear end 1611 contacts the front end 1511 of the swaging ring 15. Can be moved. As another example, if the object is another swage ring 16, the swage ring 15 may be moved until its front face 1511 contacts the rear face 1611 of the other swage ring 16. Can be.
  • the other swage ring 16 may be installed to swage the front part 11c of the outer body 11 prior to the swage ring 15, and at the same time as the swage ring 15, the outer body ( It may be installed while being symmetrically moved toward the center portion of 11).
  • the fastening protrusion 1513 of the swage ring 15 and the other swage ring 16 are eventually fastened.
  • the protrusion 1613 exerts an external force (reaction force) toward each other to induce deformation into the restrained state of at least one of both fastening protrusions 1513 and 1613. Accordingly, in the restrained state, the front face 1511 of the swage ring 15 is in contact with the rear face 1611 of the other swage ring 16 and the fastening protrusion 1513 of the swage ring 15 is different.
  • a shape in contact with the fastening protrusion 1613 of the swage ring 16 may be implemented.
  • the fastening groove 111 of the rear part 11b is disposed between the front end surface 1511 of the swage ring 15 and the recessed surface 1512 of the swage ring 15 in a restrained state. Can be formed in position. Further, the fastening groove 111 of the front part 11c is to be formed at a position between the rear end face 1611 of the other swage ring 16 and the recessed face 1612 of the other swage ring 16 in the restrained state. Can be.
  • the fastening protrusion 1513 of the swage ring 15 of the rear part 11b and the fastening protrusion 1613 of the swage ring 16 of the front part 11c are provided in the fastening groove 111. Can be combined.
  • the fastening groove 111 of the rear part 11b may be connected to the fastening groove 111 of the front part 11c. Therefore, the specifications (specification) such as the shape, width, depth, etc. of the fastening groove 111 are different from the specifications (specification) of the fastening protrusion of the swage ring 15 (specification).
  • the fastening protrusion 1513 of the swage ring 15 and the fastening protrusion 1613 of the other swage ring 16 are set to be adjacent to each other in the front-rear direction and fit into the fastening groove 111. Can be.
  • the forward movement of the swage ring 15 and the rearward movement of the other swage ring 16 may be made by a fastening tool.
  • the fastening tool may move the swage ring 15 and the other swage ring 16 such that the swage ring 15 and the other swage ring 16 move symmetrically toward each other at the same time.
  • the fastening tool may move the swage ring 15 and the other swage ring 16 such that the forward movement of the swage ring 15 and the rear movement of the other swage ring 16 occur simultaneously.
  • the engagement protrusion 1513 of the swage ring 15 may be pushed back until the engagement protrusion 1613 of the other swage ring 16 may be pushed forward.
  • the front face 1511 of the swage ring 15 is in contact with the rear face 1611 of the other swage ring 16 and the fastening protrusion 1513 of the swage ring 15 is different.
  • a shape in contact with the fastening protrusion 1613 of the wedge ring 16 may be implemented.
  • the fastening tool may include a rear support unit in contact with the rear end surface of the swage ring 15, a front support unit in contact with the front end surface of the other swage ring 16, and the swage ring 15 may have a rear part
  • the driving force for moving the rear support unit relatively to the front support unit side to move to the position surrounding the intermediate portion 11b-1 of 11b), the axial compression force according to this driving force, and the other swaging ring 16 are the front parts. It may include a driving unit for moving the front support unit relatively to the rear support unit side to move to a position surrounding the intermediate portion 11c-1 of (11c) and a driving unit for providing an axial compression force according to this driving force.
  • the fastening tool can first move either the swaging ring 15 or the other swaging ring 16 to the planned position on the outer body 11. Next, the fastening tool can follow a sequential process of moving the swage ring 15 and the other (other one) of the swage ring 16 to the planned position on the outer body 11.
  • the fastening process of the swage ring 15 and the other swage ring 16 using the fastening tool is not limited to the above-described exemplary process, and various fastening tools and processes may be applied as necessary.
  • FIG. 18 is a schematic cross-sectional view of another embodiment of the present third pipe connection device
  • FIG. 19 is an enlarged view of C of FIG. 18,
  • FIG. 20 is a swaging ring of another embodiment of the present third pipe connection device. Is a schematic cross-sectional view illustrating the introduction into the rear inlet.
  • the third pipe connection device may comprise an auxiliary swage ring 17 interposed between the swage ring 15 and the other swage ring 16.
  • the outer body 11 is disposed in such a manner that a part of the intermediate part 11a and a rear part 11b surround an end (front end) of the first pipe 210. Can be.
  • the outer body 11 may be disposed in a form in which a part of the intermediate part 11a and the front part 11c surround an end (rear end) of the second pipe 220.
  • the outer body 11 may include the front part 11c and the middle part along the longitudinal direction (three o'clock based on FIG. 18). It may be divided into 11a and the rear part 11b.
  • the swage ring 15 may contact and press around the outer periphery of the rear part 11b, and the auxiliary swage ring 17 may surround and contact the outer periphery of the intermediate part 11a. Can be pressurized.
  • the other swage ring 16 can contact and press the outer circumference of the front part 11c.
  • the auxiliary swage ring 17 has a rear contact circumferential surface 171 and a restrained state in contact with the front end surface 1511 of the front portion 151 of the swage ring 15 in a restrained state.
  • the inclined protrusion 1513 may be formed with an inclined depression having an inner circumferential surface 172 to guide the deformation so as to be fastened to the fastening groove (111).
  • the initial state of the fastening protrusion 1513 may protrude from the front end surface 1511 of the swage ring 151.
  • the initial state of the fastening protrusion 1513 is disposed such that the front contact surface 1511 of the front portion 151 of the swage ring 15 is brought into contact with the rear contact circumferential surface 171 of the auxiliary swage ring 17.
  • the protrusion may protrude forward than the inner circumferential surface 172 of the inclined recess so as to be partially overlapped (overlapped) with the inner circumferential surface 172.
  • the inner peripheral surface 172 of the inclined depression in the fastening protrusion 1513 is brought into contact with the front end surface 1511 and the rear contact circumferential surface 171 by the forward movement of the swaging ring 15. Physical pressurization may occur and deformation may occur.
  • the inner circumferential surface 172 of the inclined indentation physically presses the fastening protrusion 1513 and gradually induces the fastening protrusion 1513 to be deformed toward the inner fastening groove 111 so that the inner diameter thereof is increased toward the front. It may be formed in the form of a small slope.
  • the fastening groove 111 of the rear part 11b may be formed at a position corresponding to the inclined recess so that the fastening with the fastening protrusion 1513 is induced by the pressure of the inner circumferential surface 172.
  • the fastening groove 111 may be formed in the outer body 11 to be positioned inside the inclined recess. That is, the fastening groove 111 may be formed to be located inside the inner circumferential surface 172 of the inclined depression corresponding to the position where the inclined depression is formed in the longitudinal direction (front and rear direction or the longitudinal direction of the pipe).
  • the auxiliary swaging ring 17 has a front contact circumferential surface 173 and a restrained state in contact with the rear end face 1611 of the rear portion 161 of the other swaging ring 16 in a restrained state.
  • An inclined recess having an inner circumferential surface 174 for guiding the fastening protrusion 1613 to be deformed to be fastened to the fastening groove 111 of the front part 11c may be formed.
  • the fastening groove 111 of the front part 11c may be formed at a position corresponding to the inclined recess so that the fastening with the fastening protrusion 1613 is induced by the pressure of the inner circumferential surface 174.
  • the front contact circumferential surface 173 of the auxiliary swage ring 17 and the front end where the inclined depressions are formed are symmetrical with the rear contact circumferential surface 171 of the auxiliary swage ring 17 and the rear end where the inclined depressions are formed. Therefore, detailed descriptions of the front contact circumferential surface 173 and the inclined depressions will be omitted.
  • each of the fastening protrusion 1513 of the swage ring 15 and the fastening protrusion 1613 of the other swage ring 16 is connected to the second swaging ring 17.
  • the inner circumferential surfaces 172 and 174 of the inclined depressions respectively formed on both sides in the longitudinal direction may be pressed to be guided to the respective fastening grooves 111, so that a strong mechanical coupling may be achieved.
  • the swage ring 15 and the other swage ring 16 are simultaneously symmetrically supplemented with the auxiliary swage ring 17.
  • the swaging ring fastening process may be performed in a manner that moves toward ().
  • the fastening tool can move the swage ring 15 and the other swage ring 16 such that forward movement of the swage ring 15 and rearward movement of the other swage ring 16 occur simultaneously. .
  • the fastening tool includes a rear support unit in contact with the rear end face of the swage ring 15, an anterior support unit in contact with the front end face of the other swage ring 16, and a rear support unit and an anterior support unit facing each other. It may include a driving force providing unit for providing an axial compression force according to the driving force and the driving force to move.
  • the auxiliary swaging ring 17 may be a configuration utilized as one configuration of the fastening tool in the fastening process through the swaging of the third pipe connecting device.
  • the fastening tool is a rear support unit contacting the rear end surface of the swage ring 15, the swage ring.
  • the front support unit and the swage ring 15 in contact with the front end face of the 15 surround the middle part 11b-1 of the rear part 11b from the rear of the rear part 11b of the outer body 11.
  • the auxiliary swaging ring 17 may be utilized as a front support unit of the fastening tool.
  • the rear support unit is used as the front support unit that contacts the front end surface of the other swage ring 16.
  • the auxiliary support ring 17, which is the anterior support unit, may be utilized as a rear support unit that contacts the rear end face of the other swage ring 16.
  • the fastening tool utilizing the auxiliary swage ring 17 first of the swage ring 15 and the other swage ring 16, the swage ring 15 is moved to the rear part of the outer body 11 ( 11b), the rear support unit is provided on the rear end surface of the installed swage ring 15 when the next swaging ring 16 is to be installed on the front part 11c of the outer body 11 next.
  • the front support unit to the front surface of the other swage ring 16 to be installed, and then, using the drive unit, the other swage ring 16 is connected to the front part 11c of the outer body 11.
  • the front support unit can be moved relatively to the rear support unit side so as to be moved from the rear of the to the position surrounding the middle portion 11c-1 of the front part 11c.
  • the fastening tool utilizing the auxiliary swage ring 17, the swage ring 16 and the other swage ring 16, among the swage ring 15 and the other swage ring 16, are first part of the front part of the outer body 11. If the installation is completed in (11c) will be able to apply the fastening tool symmetrically as described above.
  • an inner protrusion 116 may be formed on an inner circumferential surface of the outer body 11. A portion of the inner protrusion 116 may contact the first pipe 210 when swaging the swage ring 15. In addition, another portion of the inner protrusion 116 may contact the second pipe 220 during swaging of the other swaging ring 16. In the swaging process, the outer body 11 may be plastically deformed in a direction in which the inner diameter and the outer diameter are reduced.
  • a portion of the inner protrusion 116 may be coupled to the first pipe 210 in the form of digging the outer circumferential surface of the first pipe 210.
  • another portion of the inner protrusion 116 may be coupled to the second pipe 220 in the form of digging the outer circumferential surface of the second pipe 220.
  • the minimum inner diameter of the inner protrusion 116 is the maximum outer diameter in consideration of the manufacturing tolerances of the first pipe 210 and the second pipe 220, taking into account the tolerances of the first pipe 210 and the second pipe 220. It is desirable to have a larger value.
  • the inner protrusion 116 may be formed with respect to the length direction so that the same or similar physical deformation or fastening may be made to each of the first pipe 210 and the second pipe 220. It is preferably formed in a symmetrical shape with respect to the center point between the first pipe 210 and the second pipe 220.
  • the inner protrusion 116 is between the middle portion 11b-1 of the rear part 11b and the first pipe 210 or the middle portion 11c-1 and the second pipe 220 of the front part 11c. It may include a sealing protrusion that seals the gap and resists the axial force acting on the first pipe 210 or the second pipe 220.
  • a plurality of inner protrusions 116 are provided so that some of the plurality of inner protrusions 116 pressurize the first pipe 210 when swaging the swage ring 15, and swaging the other swage ring 16.
  • the remaining portion of the plurality of inner protrusions 116 pressurizes the second pipe 220, thereby between the outer body 11 and the first pipe 210 and between the outer body 11 and the second pipe 220. It can be sealed.
  • the sealing protrusion may be provided in an annular structure that extends continuously along the circumferential direction.
  • a plurality of sealing protrusions may be provided at intervals along the longitudinal direction.
  • the sealing protrusion may have gratings adjacent to the defect forming a closed area of the local area and resisting torsion together if there is a defect on the outer circumferential surface of the first pipe 210 or the second pipe 220. It may be a grid-like protrusion that is repeatedly arranged in the circumferential direction on the inner circumferential surface of the middle portion 11b-1 of the front part 11b and the middle portion 11c-1 of the rear part 11c.
  • the sealing protrusion may be provided to protrude in the form of a lattice.
  • the lattice shape may be provided as an axial symmetric structure, but is not limited thereto.
  • the grating protrusions which are sealing gratings, are closed (closed) of the local area by gratings adjacent to the defects when there are defects on the surfaces of the first pipe 210 and the second pipe 220.
  • the inner space may protrude in a lattice shape along the circumferential direction thereof.
  • each lattice acts as a sort of partition wall that partitions an area inside the lattice with an area outside the lattice, thereby providing a higher anti-leakage capability.
  • the sealing when the sealing is made in the form of a lattice, leakage from the defective portion can be limited to only a predetermined lattice area and further leakage to the outside of the lattice area can be blocked.
  • the lattice shape may serve to resist the torsion applied to the pipe as well as to resist the axial force applied to the pipe.
  • the inner protrusion 116 may include a torsion resistant protrusion that resists the torsion acting on the first pipe 210 or the second pipe 220.
  • the torsion resistant protrusion may have a knurled shape (spline).
  • the torsion resistant protrusion has a tooth form formed long in the longitudinal direction (continuously extending in the longitudinal direction) repeatedly arranged along the circumferential direction on the inner circumference of the outer body 11 (internal gear shape It may be provided as).
  • the inner protrusion 116 may be provided to have a tooth when looking at the inner circumference of the longitudinal cross-section of the outer body 11.
  • This torsion resistant protrusion is provided with a rear inlet portion 11b-2, 11c-2 or front from the middle portions 11b-1, 11c-1 of the rear part 11b and the front part 11c of the outer body 11, respectively.
  • the torsion resistant protrusions may be provided in the form extending to the end (11b-3, 11c-3).
  • the torsion resistant protrusions may be applied in combination with the above-mentioned sealing protrusion.
  • the inner protrusion 116 may be formed in an annular shape having an oblique inclination (an acute angle of inclination of less than 90 degrees with respect to the axial direction of the pipe), or formed as a lattice protrusion as described above. It can serve as a torsion resistant protrusion.
  • the inner protrusion 116 may be provided in various forms in consideration of sealing, axial force resistance, torsion resistance, and the like.
  • the inner protrusion 116 may be configured to be integrally formed on the inner surface of the outer body 11.
  • the inner protrusion 116 may be implemented by inserting a ring-shaped part separately from the outer body 11.
  • both the inner surface of the outer body 11 and the outer surface of the pipe first pipe 210 or second pipe 220. Since the airtightness must be satisfied, it is preferable that the projections are formed on both the radially outer end and the inner end in the form of separately processed rings.
  • the strength and hardness of the ring-shaped part are higher than the strength and hardness of the outer body 11 and the first and second pipes 210 and 220. It can be set higher than the strength and hardness of. According to such a strength and hardness setting, the inner protrusion 116 can be formed to penetrate deeper into the inner surface of the outer body and the outer surface of the pipe, it is possible to further improve the airtightness and mechanical strength of the third pipe connecting device. Will be.
  • the length of the outer body 11 may be set to a length that satisfies the minimum number of inner protrusions 116 that can withstand the axial external force on the pipe that is expected or actually acted upon in the pipe connection design. Since this is related to the structural strength of the inner protrusion 116 and the strength of the first pipe 210 and the second pipe 220, the material and shape of the inner protrusion 116, the first pipe 210 and the second pipe It is preferable to set differently according to each case and conditions based on the material, thickness, etc. of 220.
  • a stopper (not shown in the drawing) which restricts forward movement of the first pipe 210 and restricts backward movement of the second pipe 220 on the inner circumferential surface corresponding to the center of the outer body 11. ) May be formed.
  • the stopper may move the front part 11c of the rear part 11b. It may be formed on the inner circumference of one of the facing portion and the portion facing the rear part 11b of the front part 11c. 18, when the outer body 11 is divided into the front part 11c, the middle part 11a, and the rear part 11b along the longitudinal direction, the stopper is formed on the inner circumference of the middle part 11a. Can be formed.
  • the stopper may limit movement forward of the first pipe 210 and movement backward of the second pipe 220.
  • each of the first pipe 210 and the second pipe 220 may be inserted into the outer body 11 to a position in contact with the stopper. Since the stopper is disposed at the center of the outer body 11, the symmetrical arrangement of the first pipe 210 and the second pipe 220 with respect to the outer body 11 may be facilitated.
  • the inner protrusion 116 described above may be formed symmetrically with respect to this stopper.
  • the stopper may be provided similarly to the same as the inner protrusion 116.
  • the stopper may be configured to be integrally formed on the inner surface of the outer body 11.
  • the stopper may be implemented in a form in which a ring-shaped accessory (for example, a C-shaped ring) processed separately from the outer body 11 is inserted into the outer body 11.
  • the stopper may be optionally provided in some cases.
  • the fastening groove 111 may be a groove formed by pressing the outer circumferential surface of the front end of the outer body 11 while the fastening protrusion 1513 is deformed from the initial state to the restrained state.
  • the fastening protrusion 1513 may be deformed in the form of being pressed back and plastically deformed to press (press) the outer circumferential surface of the outer body 11.
  • the fastening groove 111 may be formed on the outer circumferential surface of the outer body 11. Accordingly, the fastening protrusion 1513 may be naturally engaged with and fastened to the fastening groove 111 formed by its pressing.
  • the fastening groove 111 may be a groove previously formed on the outer circumferential surface of the front end of the outer body 11 before the swaging of the swaging ring 15. In this case, less external force may be required to fasten the fastening protrusion 1513 and the fastening groove 111.
  • the preformed groove is formed in advance on the outer circumferential surface of the outer body 11 prior to the fastening of the fastening groove 111 and the fastening protrusion 1513 in consideration of the position, depth, and width of the fastening groove 111 in the restrained state. Can be.
  • the pre-formed groove may be formed only to guide the deformation of the fastening protrusion 1513 to be guided to the inside thereof, and may be expanded to have a greater depth, width, and the like in a restrained state.
  • the pre-formed groove is formed only to guide, it can be understood as a wide concept encompassing even the groove is formed to be wider or deeper as the fastening protrusion 1513 is inserted.
  • the fastening groove 111 may be formed on the outer circumferential surface of the outer body 11 to be located between the front end surface 1511 and the recessed surface 1512 of the front portion 151 of the swage ring 15 in a restrained state. have. Accordingly, when the object contacts the front end surface 1511 of the swage ring 15 and presses the fastening protrusion 1513 backward, the fastening protrusion (! 513) which is formed obliquely forward and inwardly is naturally deformed inward. A portion of the fastening groove 111 may be inserted into engagement with the fastening groove 111.
  • fastening groove 111 of the rear part 11b and the fastening groove 111 of the front part 11c may be the same or similar except that they are symmetrical with each other, the fastening groove of the rear part 11b described above.
  • the description of the 111 may also be applied to the fastening groove 111 of the front part 11c.
  • an intermediate portion of the rear part 11b is formed on the inner circumferential surface of the front end 11b-3 of the rear part 11b of the outer body 11.
  • a front end support member 1191 protruding inward may be provided to maintain an outer diameter relatively larger than that of (11b-1). According to this front end support member 1191, the deformation that the outer diameter of the outer body 11 is reduced by swaging by the swage ring 15 is related to the front end 11b-3 of the outer body 11. The impact can be further minimized.
  • the inner circumferential surface of the rear end portion 11c-3 of the front part 11c is inward to maintain a relatively larger outer diameter than the middle portion 11c-1 of the front part 11c.
  • a protruding rear end support member 1192 may be provided. According to such a rear end supporting member 1192, the deformation in which the outer diameter of the outer body 11 is reduced by swaging by the swage ring 15 is related to the rear end 11c-3 of the outer body 11. The impact can be further minimized.
  • at least a portion of the front end support member 1191 and at least a portion of the rear end support member 1192 may be provided between the front tapered portion 152 and the rear tapered portion 162 to be described later. Can be.
  • the swage of the swaging ring 15 that deforms the middle portion 11b-1 of the rear part 11b in a direction in which the outer diameter is reduced.
  • the middle part 11b-1 of the rear part 11b by swaging the other swaging ring 16 which deforms the middle part 11c-1 of the wedging and the front part 11c in the direction of decreasing outer diameter.
  • At least a portion of the inner circumferential surface of the first pipe 210 may press the outer circumferential surface, and at least a portion of the inner circumferential surface of the middle portion 11c-1 of the front part 11c may press the outer circumferential surface of the second pipe 220.
  • a swage ring that deforms the middle portion 11b-1 of the rear part 11b and the middle portion 11c-1 of the front part 11c in a direction of decreasing outer diameter.
  • the intermediate portion 11b-1 of the rear part 11b can be smaller in outer diameter than the front end 11b-3 of the rear part 11b.
  • the outer portion 11c-1 of the front part 11c may have a smaller outer diameter than the rear end 11c-3 of the front part 11c.
  • the swiveling of the swaging ring 15 which deforms the middle portion 11b-1 of the rear part 11b in the direction of decreasing outer diameter causes the front end 11b-3 to become the middle portion 11b-1.
  • the outer diameter can be larger relatively.
  • the swage ring 15 is provided with a shorter length than the rear part 11b, the swage ring 15 is intermediate without reaching the front end 11b-3 on the rear part 11b.
  • the part 11b-1 can be pressurized. Accordingly, the front end 11b-3 of the rear part 11b of the outer body 11 is relatively smaller than the middle portion 11b-1 of the rear part 11b of the outer body 11 with the reduced outer diameter.
  • the outer diameter can be large.
  • the rear end 11c-3 has the intermediate portion 11c-1 by swaging the other swaging ring 16 which deforms the middle portion 11c-1 of the front part 11c in the direction of decreasing outer diameter.
  • the outer diameter can be larger than). Since the other swage ring 16 is provided with a shorter length than the front part 11c, the other swage ring 16 does not reach the rear end 11c-3 on the front part 11c, but the intermediate part 11c. -1) can be pressurized. Accordingly, the rear end portion 11c-3 of the front part 11c may be in a state where the outer diameter is relatively larger than the middle portion 11c-1 of the front part 11c having the reduced outer diameter.
  • the front end 11b-3 is swage ring 15 by an outer diameter relatively larger than the middle part 11b-1.
  • the front end 11b-3 naturally having a relatively larger outer diameter than the middle portion 11b-1 by the swaging method of pressing only the middle portion 11b-1 of the third pipe connection device is
  • the swaging ring 15 may serve as a limiting jaw (limiter) that restricts further progression in the direction in which the swaging ring 15 has advanced.
  • the front end portion of the inner circumferential surface of the swage ring 15 is provided with a swaging of the swage ring 15 that deforms the intermediate portion 11b-1 in a direction of decreasing outer diameter.
  • the shear tapered portion 152 may be formed to be in contact with a portion of the outer circumferential surface of the front end portion 11b-3 having a larger outer diameter than the intermediate portion 11b-1.
  • the inner diameter of the shear tapered portion 152 may increase toward the front.
  • the introduction of the swaging ring 15 into the rear inlet portion 11b-2 by the front end taper 152 can be made smoothly and easily.
  • the outer diameter of the outer peripheral surface of the front end portion 11b-3 of the rear part 11b of the outer body 11 is gradually enlarged in contact with the front end taper 152 by the front end taper 152 (
  • the frictional resistance due to the contact may be organically combined in the limiting jaw of the front end 11b-3. That is, the front end portion 11b-3 serves as a limiting jaw that restricts the forward departure of the swage ring 15 by the outer diameter relatively larger than the middle portion 11b-1 and the frictional resistance with the shear tapered portion 152. can do.
  • the swage ring 15 may also be formed on the front end 11b-3 of the rear part 11b of the outer body 11 as described above. Some (shear taper) may be in contact. That is, the swage ring 15 presses against the inner circumferential surface having the largest inner diameter against the middle portion 11b-1 of the rear part 11b of the outer body 11, while swaging the outer body 11 of the outer body 11. A part of the front end 11b-3 of the rear part 11b can be said to be swissed by the shear taper 152 whose inner diameter gradually expands, and gradually relaxes toward the front.
  • the shear tapered portion 152 may be formed to connect between the front portion 151 and the intermediate portion formed to have a constant inner diameter in the swage ring 15.
  • the fastening protrusion 1513 is a fastening groove 111 formed on the outer circumferential surface of the front end 11b-3 whose outer diameter is relatively larger than the middle portion 11a by swaging of the swaging ring 15 in the restrained state. It may be provided to be fastened with.
  • the swage ring 15 since the swage ring 15 includes an intermediate portion formed to have a constant inner diameter, the swage ring 15 may apply an external force to the intermediate portion 11b-1 of the rear part 11b in a forward and backward direction.
  • the inner diameter of the front part of the swage ring 15 (the front part of the shear taper 152) is before the movement of the swage ring 15 to the front (before the tightening by the fastening tool is started). Forced against the outer body 11 (particularly the rear inlet 11b-2) so that the swaging ring 15 is introduced (assembled) with respect to the outer body 11 so that it is not easily separated from the outer body 11. This can have a possible inner diameter.
  • the shear tapered portion 152 connected to the front portion of the swaging ring 15 is formed to be inclined to have an inner diameter that gradually decreases from the inner diameter corresponding to the outer diameter of the outer body 11 to the rear to enable the interference fit. Can be.
  • the inner diameter of the rear end of the front end taper 152 (the part connected to the middle part of the swage ring as the end part) is set smaller than the outer diameter of the rear part 11b of the outer body 11, whereby the outer body 11 A portion of the front end 11b-3 of the rear part 11b of the c) may serve as a limiting jaw that is frictional and shear resistant to the shear tapered portion 152.
  • the inner diameter of the rear end of the front taper portion 152 within the range set smaller than the outer diameter of the outer body 11, considering the mechanical coupling requirements of the pipe connecting device and the manufacturing tolerances of the pipe (pipe) is appropriate. It is preferable to determine by numerical value.
  • a rear end taper may be formed at a rear end portion of the inner circumferential surface of the swage ring 15 provided for the rear part 11b.
  • the rear end taper may have a shape in which the inner diameter thereof is increased toward the rear side.
  • the rear inlet portion 11b-2 of the rear part 11b of the outer body 11 is deformed in a direction in which the outer diameter is reduced by swaging of the swage ring 15 and then the swage ring 15 After passing through, at least a portion of the outer surface is elastically deformed or the outer circumferential side thereof is pulled forward at least partially according to the movement of the swage ring 15 so that the outer diameter is relatively smaller than the middle portion 11b-1 of the rear part 11b. It can be deformed in the direction of increasing.
  • the rear end taper portion is in contact with a portion of the rear inlet portion 11b-2 having a larger outer diameter than the middle portion 11b-1 of the rear part 11b of the outer body 11, and thus the rear inlet portion 11b-2.
  • the resistance force by friction with the rear end taper portion may be organically combined to act as a limiting jaw.
  • the rear end part 11c-3 prevents the rear part departure of the other swage ring 16 by the outer diameter relatively larger than the intermediate part 11c-1. can do.
  • the rear end 11c-3 which naturally has a relatively large outer diameter compared to the middle portion 11c-1, restricts further advancement in the direction in which the other swaging ring 16 proceeds after the swaging is completed. Can act as a limiting jaw (limiter).
  • the rear end taper portion 162 may be formed to be in contact with a portion of the outer circumferential surface of the rear end portion 11c-3 having a larger outer diameter than the middle portion 11c-1 by the wedging.
  • the inner diameter of the rear end taper 162 may increase toward the rear.
  • the outer diameter of the outer peripheral surface of the rear end portion 11c-3 of the front part 11c of the outer body 11 is gradually extended by the rear end taper portion 162 in contact with the rear end taper portion 162 (
  • the frictional resistance due to the contact may be organically combined in the limiting jaw of the rear end portion 11c-3. That is, the rear end portion 11c-3 serves as a limiting jaw that restricts the forward departure of the other swage ring 16 by friction resistance with the outer diameter and the rear end taper portion 162 which are relatively larger than the middle portion 11c-1. can do.
  • the swage ring 16 is also applied to the rear end 11c-3 of the front part 11c of the outer body 11 as described above.
  • a portion (back taper) may be in contact. That is, the other swage ring 16 presses the inner circumferential surface having the largest inner diameter against the middle portion 11c-1 of the front part 11c of the outer body 11 while swaging the outer body 11.
  • a part of the rear end portion 11c-3 of the front part 11c of the swiss may be pressed by the rear end taper portion 162 whose inner diameter gradually expands to gradually relax toward the rear side.
  • the rear end taper portion 162 may be formed to connect between the front portion and the intermediate portion formed to have a constant inner diameter in another swaging ring 16.
  • the fastening protrusion 1613 is a fastening groove formed on the outer circumferential surface of the rear end portion 11c-3 having a larger outer diameter than the middle portion 11c-1 by swaging the other swaging ring 16 in the restrained state. It may be provided to be coupled with the (111).
  • the other swage ring 16 provided for the front part 11c and the front part 11c of the outer body 11 is provided with respect to the rear part 11b and the rear part 11b.
  • the third pipe connecting device may include the above-mentioned fastening tool.
  • the fastening tool may be a temporary, temporary configuration in which the swaging ring 15 is removed after fastening to surround the rear part 11b.
  • the auxiliary swaging ring 17, which may be utilized as a configuration of the fastening tool, may not be removed.
  • the outer body 11 swage ring 15 and the other swage ring 16 are preferably made of the same material as the first pipe 210 and the second pipe 220. This is influenced by the surrounding environment of the first pipe 210 and the second pipe 220 such as temperature change, between the first pipe 210 and the outer body 11 and between the second pipe 220 and the outer body 11. This is to minimize the change in the physical bonding force between).
  • the swage ring 15, and the other swage ring 16 the potential difference between the metals that are in contact with each other. There is also an advantage to minimize potential corrosion.
  • the outer circumferential surface of the outer body 11, the inner circumferential surface of the swage ring 15 and the inner circumferential surface of the other swage ring 16 are preferably lubricated and coated with a lubricant or a good lubricity material. This lowers the need to use unnecessarily strong fastening tools.
  • a material coated on the outer circumferential surface of the outer body 11, the swage ring 15, and the inner circumferential surface of the other swage ring 16 for lubrication coating may be provided on the first pipe 210 and the second pipe 220.
  • the outer body 11, the swage ring 15, and the other swage ring 16 have pipes (first pipe 210 and second pipe 220). It is preferable to perform corrosion resistant surface treatment first before lubrication coating to ensure corrosion resistance equal to or higher than that of the material.
  • the fastening tool may comprise a rear support unit, an anterior support unit and a drive unit.
  • the drive unit can be moved relative to each other by pulling the rear support unit relative to the front support unit. Since various driving devices such as a driving unit (actuator) using hydraulic pressure may be applied to the driving unit, a more detailed description thereof will be omitted.
  • the rear support unit is recessed to be stepped backward from the second contact circumferential surface and the second contact circumferential surface in contact with the rear end surface of the swaging ring 15, and the rear part 11b of the outer body 11 is formed.
  • a second body contact recessed surface in contact with the rear end surface of the rear introduction portion 11b-2 may be formed.
  • the depression amount (step amount) of the second body contact depression surface may be set in the same manner, that is, to correspond to the length of the rear introduction portion 11b-2 of the rear part 11b.
  • the depression amount (step amount) of the second body contact depression surface is set to be shorter than the length of the rear introduction portion 11b-2 of the rear part 11b, whereby the depression amount (step amount) and the rear introduction portion 11b are provided.
  • the rear inlet portion 11b-2 is compressed by a length difference of -2
  • a deformation may occur in which a part thereof protrudes outward, and the protrusion that restricts the rearward movement of the swage ring 15 by this protrusion deformation ( bead) can be formed.
  • a groove for inducing beads to be recessed outward may be formed in the inner circumferential surface of the rear inlet 11b.
  • the bead guide groove formed on the inner circumferential surface of the rear inlet portion 11b-2 when the rear inlet portion 11b-2 is compressed, a deformation in a direction in which a part thereof protrudes outward can be induced more naturally.
  • Such beads and bead guide grooves can be applied to the front part 11c as well as the rear part 11b. That is, the bead and the bead guide groove can be applied to both the swage ring 15 corresponding to the rear part 11b and the swage ring 16 corresponding to the front part 11c.
  • the outer body 11 since the outer body 11 is provided with a structure that protrudes to the outer surface and no outer protrusions, the outer body 11 can be manufactured with as little processing and material amount as possible from the pipe-type raw material, thereby greatly reducing the manufacturing cost. have.
  • the mechanical coupling of the swage ring 15 and the outer body 11 may be made by plastic deformation of the fastening protrusion 1513, the friction coupling structure or member between the conventional swage ring and the outer body 11 may be used.
  • the elastic deformation configuration of the sewage ring can be ensured a high departure stopping force compared to the way to prevent the departure from the outer body. Accordingly, in the pipe connecting device, greater mechanical coupling performance against vibration and shock can be ensured.
  • the function of the protrusion of the conventional outer body becomes unnecessary, and thus the conventional outer Since the length of the outer body 11 can be reduced compared to the body, weight can be greatly reduced and construction in a narrower space is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Joints With Sleeves (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

L'invention concerne un dispositif de raccordement de tuyau permettant de raccorder les parties d'extrémité opposées de deux tuyaux l'une à l'autre. Le dispositif de raccordement de tuyau comprend : un corps extérieur dans lequel la partie d'extrémité d'un premier tuyau est insérée depuis l'arrière de ce dernier et la partie d'extrémité d'un second tuyau est insérée depuis l'avant de ce dernier ; et une bague de sertissage permettant d'entourer la périphérie externe du corps externe, de venir en contact avec ce dernier et de le comprimer, la bague de sertissage venant en contact et comprimant une partie médiane du corps externe, à l'exclusion d'une partie d'introduction arrière de ce dernier, qui vient en contact avec la bague de sertissage uniquement lorsque la bague de sertissage est introduite, et d'une partie d'extrémité avant de ce dernier, avec laquel la bague de sertissage ne vient pas en contact, et un diamètre interne initial de la bague de sertissage avant le sertissage étant inférieur à un diamètre externe initial du corps externe avant le sertissage.
PCT/KR2018/001303 2017-03-07 2018-01-31 Dispositif de raccordement de tuyaux WO2018164373A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SG11201908184W SG11201908184WA (en) 2017-03-07 2018-01-31 Pipe connection device
PH12019550158A PH12019550158A1 (en) 2017-03-07 2019-09-05 Pipe connection device

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR1020170028909A KR101792571B1 (ko) 2017-03-07 2017-03-07 파이프 연결 장치
KR10-2017-0028909 2017-03-07
KR10-2017-0106550 2017-08-23
KR1020170106550A KR101937862B1 (ko) 2017-08-23 2017-08-23 파이프 연결 장치
KR10-2017-0106549 2017-08-23
KR1020170106549A KR101937860B1 (ko) 2017-08-23 2017-08-23 파이프 연결 장치

Publications (1)

Publication Number Publication Date
WO2018164373A1 true WO2018164373A1 (fr) 2018-09-13

Family

ID=63448046

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/001303 WO2018164373A1 (fr) 2017-03-07 2018-01-31 Dispositif de raccordement de tuyaux

Country Status (3)

Country Link
PH (1) PH12019550158A1 (fr)
SG (3) SG10201913496TA (fr)
WO (1) WO2018164373A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482174A (en) * 1980-09-15 1984-11-13 Lokring Apparatus and method for making a tube connection
US4541659A (en) * 1981-10-01 1985-09-17 Daiwa Steel Tube Industries Co., Ltd. Permanently sealed threadless joint
US4848802A (en) * 1988-02-08 1989-07-18 Fluoroware, Inc. Tubing connector assembly
US5088771A (en) * 1990-02-06 1992-02-18 Sierracin Corporation Tube union
JPH07113486A (ja) * 1993-08-24 1995-05-02 Orii Corp 管継手及び管継手接合用拡大工具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482174A (en) * 1980-09-15 1984-11-13 Lokring Apparatus and method for making a tube connection
US4541659A (en) * 1981-10-01 1985-09-17 Daiwa Steel Tube Industries Co., Ltd. Permanently sealed threadless joint
US4848802A (en) * 1988-02-08 1989-07-18 Fluoroware, Inc. Tubing connector assembly
US5088771A (en) * 1990-02-06 1992-02-18 Sierracin Corporation Tube union
JPH07113486A (ja) * 1993-08-24 1995-05-02 Orii Corp 管継手及び管継手接合用拡大工具

Also Published As

Publication number Publication date
SG11201908184WA (en) 2019-10-30
PH12019550158A1 (en) 2020-10-26
SG10201913494QA (en) 2020-03-30
SG10201913496TA (en) 2020-02-27

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