KR102137995B1 - Pipe connection apparatus - Google Patents

Abstract

A pipe connection device is disclosed, wherein the pipe connection device comprises: an outer body having a pipe mounting part having a pipe insertion space opened rearward to allow insertion of a pipe end; And a swage ring surrounding, contacting, and pressing at least a portion of the pipe mounting part, wherein the pipe mounting part includes a first swaging part having a first inner protruding part, a second inner protruding part and forming the first swaging part. And a second swaging portion positioned at a distance from the front, a connecting portion connecting the first swaging portion and the second swaging portion, and an extension portion extending forward from the second swaging portion, the swage ring Silver, a first ring portion having a first ring inner diameter with a front end larger than the outer diameter of the pipe end, a second ring portion having a second ring inner diameter with a front end larger than the first ring inner diameter, The first swaging thickness, which is the thickness from the outer circumferential surface of the first swaging portion to the protruding end of the first inner protrusion, is the second thickness from the outer circumferential surface of the second swaging portion to the protruding end of the second inner protrusion. Smaller than the swaging thickness.

Description

Pipe connection device {PIPE CONNECTION APPARATUS}

The present application relates to a pipe connecting device.

Pipes are widely used as part of structures or piping for leak-free transport of fluids due to ease of production and structural advantages. There are a mechanical joint method or a welding/fusion method for the pipe joining method.

Among them, the mechanical joint method can be divided into a decomposable (separable) bond method and a permanent bond method. Screw joints and bolted joints using flanges provide degradable bonding of the former, and press bonding or swaging provide permanent bonding of the latter.

1A and 1B are cross-sectional views schematically showing before and after swaging of a conventional pipe connecting device.

Referring to Figures 1a and 1b, the conventional device for connecting the pipe using the swaging principle of the body 330 and the body 330 surrounding a certain area cylindrically from the ends of the pipe (1510, 220) It includes a swage ring (310, 320) to guide the outer diameter of the body to decrease while moving linearly along the longitudinal direction toward the center.

As the outer diameter of the body 330 decreases due to the movement of the swage rings 310 and 320, a gap between the inner surface of the body 330 and the outer surface of the pipes 1510 and 220 is removed to prevent the fluid from leaking and the pipe at the same time. 1520 is strongly fixed to the body 330.

The combination of the swaging method is widely used because it can secure high reliability and bonding strength compared to other mechanical joint methods, and is easy to construct and easy to control quality compared to the welding/fusion method.

The background technology of the present application is disclosed in Korean Registered Patent Publication No. 1365539.

Provided is a pipe connecting device capable of increasing mechanical coupling strength, lowering manufacturing cost, and reducing weight and size, while maintaining the advantages of a swaging pipe (tube) connecting device. The purpose.

As a technical means for achieving the above technical problem, a pipe connecting device according to an embodiment of the present application includes: an outer body having a pipe mounting part formed with a pipe insertion space opened rearward to allow insertion of a pipe end; And a swage ring surrounding, contacting, and pressing at least a portion of the pipe mounting part, wherein the pipe mounting part includes a first swaging part having a first inner protruding part, a second inner protruding part and forming the first swaging part. And a second swaging portion positioned at a distance from the front, a connecting portion connecting the first swaging portion and the second swaging portion, and an extension portion extending forward from the second swaging portion, the swage ring Silver, a first ring portion having a first ring inner diameter with a front end larger than the outer diameter of the pipe end, a second ring portion having a second ring inner diameter with a front end larger than the first ring inner diameter, The first swaging thickness, which is the thickness from the outer circumferential surface of the first swaging portion to the protruding end of the first inner protrusion, is the second thickness from the outer circumferential surface of the second swaging portion to the protruding end of the second inner protrusion. It may be less than the swaging thickness.

The above-described problem solving means are merely exemplary and should not be construed as limiting the present application. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-described problem solving means of the present application, a state in which the inner circumferential surface of the second ring portion is inserted into the pipe in an assembled state in contact with the outer circumferential surface of the first swaging portion and the inner circumferential surface of the second ring portion is in contact with the outer circumferential surface of the second swaging portion When the swage ring is moved as much as possible, swaging for the outer body can be achieved, so the distance that the swage ring needs to move for swaging can be reduced compared to the prior art, and accordingly, a pipe connecting device having a shorter length than the conventional It can be implemented, the weight and size of the fastening tool for swaging is reduced, and swaging can be easily performed.

In addition, unlike in the prior art, in the assembly process for contacting the inner circumferential surface of the second ring portion of the swage ring with the outer circumferential surface of the first swaging portion, the slope is in contact with the outer surface of the connecting portion of the outer body in the form of a surface contact with the inner surface of the swage ring. Since it can be formed, swaging that further moves the swage ring forward so that the inner circumferential surface of the second ring portion of the swage ring contacts the outer circumferential surface of the second swaging portion can be made with less force than in the prior art, and energy consumed by the tool Can be reduced, and the structural rigidity of the tool to prevent deformation of the tool can be reduced, and the weight of the tool can also be reduced.

In addition, unlike the prior art, the outer body is provided without a structure that protrudes from the outer circumferential surface (for example, referring to FIGS. 1A and 1B, a structure in which the outer circumferential surface corresponding to the inner protrusion where swaging is performed is convexly projected) The outer surface of the body and the inner surface of the swage ring can be in close contact, so that the force applied to the inside/outside of the pipe after completion of the fastening to the pipe can be uniformly distributed to the inner surface of the swage ring through the outer surface of the outer body, Accordingly, the mechanical stiffness is improved, and a pipe connection device capable of having high resistance to external forces such as vibration and shock in pipe connection can be implemented.

In addition, unlike the conventional structure, the outer body is provided without a protruding structure from the outer circumferential surface (for example, a protruding structure for mounting a fastening tool) or an outer protrusion, so that the outer body can be manufactured with as little processing of raw material in the form of a pipe It can be a form, the manufacturing cost can be greatly reduced.

In addition, according to the above-described problem solving means of the present application, the outer portion of the outer body is reduced by swaging, and the outer end of the outer body can be relatively larger in diameter than the middle portion, thereby pressing the outer circumference of the outer portion of the outer body. In addition, a pipe connecting device in which the limiting jaw, which restricts the movement of the surrounding swage ring to the front, is automatically formed by swaging without additional configuration, may be implemented.

In addition, according to the above-described problem solving means of the present application, if there is only a forward movement to the middle of the outer body of the swage ring, the ends of each of the two pipes are swaged and interconnected while securing a predetermined mechanical strength, thereby reducing construction time. Pipe connection device having the advantage of being can be implemented.

1A and 1B are cross-sectional views schematically showing before and after swaging of a conventional pipe connecting device.
Figure 2 is a schematic cross-sectional view showing that the pipe is inserted into the pipe connection device according to an embodiment of the present application in an assembled state.
3 is a schematic cross-sectional view of a pipe connecting device according to an embodiment of the present application in a swaging state.
4 is a schematic cross-sectional view of a swage ring and an outer body of a pipe connecting device according to an embodiment of the present application before assembly.
Figure 5 is a schematic cross-sectional view showing a pipe connection device according to an embodiment of the present application in an assembled state without a pipe inserted.
FIG. 6 is a schematic cross-sectional view of an outer body having a swedge ring and an outer protrusion formed in a sloped shape with a lower front surface of a pipe connecting device according to an embodiment of the present application before assembly.
7 is a schematic cross-sectional view of a pipe connecting device according to an exemplary embodiment of the present application in which the lower surface of the front end includes an outer body formed with a swage ring and an outer protrusion formed in a sloped shape.
8 is a schematic cross-sectional view of a pipe connection device according to an embodiment of the present application shown with a fastening tool to illustrate other pipe mounting parts and fastening tools.
9 is a schematic cross-sectional view of a pipe connecting device according to an embodiment of the elbow type herein.
10 is a schematic cross-sectional view of a pipe connection device according to an embodiment of the present application of a union tee type.
11 is a schematic cross-sectional view of a pipe connection device according to an embodiment of the present application shown with a fastening tool to illustrate a fastening tool.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present application pertains may easily practice. However, the present application may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout this specification, when a part is "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element in between. do.

Throughout this specification, when one member is positioned on another member “on”, “on top”, “top”, “bottom”, “bottom”, “bottom”, it means that one member is on another member This includes cases where there is another member between the two members as well as when in contact.

Throughout the present specification, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless specifically stated to the contrary.

In addition, in this application, the longitudinal direction (longitudinal direction) of a pipe is defined and demonstrated in the front-rear direction. For example, based on FIG. 2, the 3 o'clock direction (right direction) may be forward, and the 9 o'clock direction (left direction) may be backward. However, the longitudinal direction of the pipe is not only dependent on the front-rear direction in the actual arrangement of the pipe. In other words, the pipes can be arranged in various directions (for example, up and down directions, oblique directions, etc.) as well as in the front-rear direction, as well as the pipe arrangement.

Hereinafter, a pipe connection device (hereinafter referred to as a'this pipe connection device') according to an embodiment of the present application will be described.

Figure 2 is a schematic cross-sectional view showing that the pipe is inserted into the pipe connection device according to an embodiment of the present application in an assembled state, and FIG. 3 is a schematic view of a pipe connection device according to an embodiment of the present application in a swaged state 4 is a schematic cross-sectional view of a swage ring and an outer body of a pipe connecting device according to an embodiment of the present application before assembly, and FIG. 5 is an embodiment of the present application in a state where the pipe is not inserted and is assembled. It is a schematic cross-sectional view showing a pipe connecting device. In addition, it is preferred to understand the description herein in view that at least some of the plastic deformation by swaging in the drawings herein may be simplified or omitted from the illustration.

Referring to FIG. 2, the pipe connecting device includes an outer body 11. The outer body 11 has a pipe mounting part 111 in which a pipe insertion space is opened rearward (in the direction of 9 o'clock in FIG. 2) so that the end of the pipe 210 can be inserted. Referring to FIG. 2, the outer body 11 has a first swaging portion 111a, a second swaging portion 111b, a connecting portion 111c, and an extending portion 111d at the end (front end) of the pipe 210. It can be arranged in a surrounding form. For reference, the pipe mounting part 111 of the outer body 11 has a first swaging portion 111a and a second with a first inner projection 112 formed along a longitudinal direction (3-9-9 in FIG. 2). The inner protrusion 113 is formed and the second swaging part 111b positioned at a distance forward from the first swaging part 111a, and a connecting part connecting the first swaging part 111a and the second swaging part 111b It includes (111c) and the extension portion 111d extending forward from the second swaging portion (111b). For example, referring to FIG. 4, the connecting portion 111c may include a section maintaining a constant thickness. For example, referring to FIG. 4, the section maintaining a constant thickness of the connecting portion 111d may be a section in which the inner diameter and the outer diameter are also kept constant before the assembly of the swage ring 15. 2 and 3, the section maintaining a constant thickness of the connecting portion 111d is deformed into a curved slope shape corresponding to the shape of the inner circumferential surface of the swage ring 15 by swaging the swage ring 15 Can be.

In addition, the first swaging thickness, which is the thickness from the outer circumferential surface of the first swaging portion 111a to the protruding end of the first inner protruding portion 112, is the second inner protruding portion 113 from the outer circumferential surface of the second swaging portion 111b. It is smaller than the second swaging thickness, which is the thickness to the protruding end.

The outer body 11 is pressurized by a swage ring 15, which will be described later, and at least a part (the first swaging portion 111a and the second swaging portion 111b) is a pipe located inside the outer body 11 ( As a configuration that is in close contact (contact) to the outer circumferential surface of 210, it prevents leakage of material inside the pipe 210 and fastening separation (departure) of the pipe 210, and can mechanically connect the pipe 210 with other pipes. To this end, the outer body 11 needs to have a mechanical strength equal to or higher than that of the pipe 210.

In addition, the pipe connecting device includes a swage ring 15. Referring to FIGS. 2 and 3 together, the swage ring 15 is introduced from the first swaging unit 111a and moved forward, and may be configured to swab at least a portion of the outer body 11. . 2 and 3, the swage ring 15 is located in front of the first ring portion 15a, the first ring portion 15a having a first ring inner diameter with a front end larger than the outer diameter of the pipe end. And a second ring portion 15b having a second ring inner diameter larger than the first ring inner diameter. Accordingly, the inner surface of the swage ring 15 may be configured in such a manner that the outer diameter decreases toward the rear, and accordingly, the outer surface of the outer body is swung by swaging as the swage ring 15 moves forward. The outer body 11 may be swaged such that its outer diameter decreases toward the rear.

Also, referring to FIGS. 2 and 3, the swage ring 15 surrounds at least a portion of the pipe mounting part 111 and contacts and presses. It will be described in detail below.

Referring to FIG. 4 and FIG. 5, the swage ring 15 is introduced from the first swaging portion 111a and moves forward (assembly process between the swede ring 15 and the outer body 11) It can be assembled between parts. Referring to FIG. 5, the assembling completion state between parts may mean a state in which the inner circumferential surface of the second ring portion 15b contacts the outer circumferential surface of the first swaging portion 111a. Also, referring to FIG. 4, in the pre-assembly state before the swage ring 15 is assembled to the outer body 11, the maximum outer diameter of the first swaging portion 111a and the connecting portion 111c is the second ring inner diameter. Can be larger. Accordingly, in the assembly process between the swage ring 15 and the outer body 11, the second ring portion 15b may plastically deform at least a portion of the first swaging portion 111b and the connecting portion 111b, In the assembled state between parts, the contact and pressurization of the swage ring 15 to the outer body 11 may be made with respect to the first swaging part 111a and the connecting part 111b, and accordingly, the first swaging part At least a portion of the 111a and the connecting portion 111b may be deformed in a direction in which the outer diameter is reduced. In addition, at least a part of the swage ring 15 (the second ring part 15b and the second taper part 15d) to be described later in the assembly process between parts and at least a part of the outer body 11 (connecting part 111c) And a contact stress between the outer surfaces of the first swaging portion 111a), whereby the swage ring 15 and the outer body 11 may be strongly coupled in a state in which assembly between parts is completed.

However, referring to FIG. 5, in a state where assembly between parts is completed, the second protruding inner diameter of the protruding end of the second inner protruding part 113 (the second inner protruding part 113) is so that the pipe end can be inserted into the pipe insertion space. The maximum inner diameter by the inner surface) and the inner diameter of the second ring inner diameter reduced by twice the thickness of the first swaging (the inner peripheral surface of the second ring portion 15b is in contact with the outer peripheral surface of the first swaging portion 111a), The inner diameter of the first inner protrusion 112 by the inner surface may be greater than or equal to the outer diameter of the pipe end (the maximum allowable outer diameter of the pipe end). Accordingly, referring to FIG. 2, when the assembly between parts is completed, the pipe end can be inserted into the swage ring 15 and the outer body 11.

In addition, referring to FIG. 4, the second taper starting inner diameter of the front end of the second taper portion 15d may be greater than or equal to the maximum outer diameter of the pipe mounting part 11. Accordingly, it is possible to easily pull in the swage ring 15 into the outer body 11 (that is, start assembly between parts).

In addition, referring to FIG. 3, the swaging ring 15 may be further moved forward (swaging process) from the inter-assembly completion state to form a swaging completion state. The swaging completion state means that the inner circumferential surface of the first ring portion 15a contacts the outer circumferential surface of the first swaging portion 111a and the inner circumferential surface of the second ring portion 15b contacts the outer circumferential surface of the second swaging portion 111b. It can mean a state. In the swaging process, the second ring portion 15b may plastically deform at least a portion of the second swaging portion 111b and the extension portion 111d, and in the swaging completion state, the outer body of the swage ring 15 ( 11) may be contacted and pressed against at least a portion of the first swaging portion 111a, the connecting portion 111b, the second swaging portion 111b, and the extending portion 111d. Accordingly, the second swaging unit 111b may be deformed in a direction in which the outer diameter is reduced, for example, the inner diameter of the front end of the swage ring 15 and the swaging ring 15 in the swaging completion state. 2 The outer diameter is reduced by a difference in the inner diameter of the portion in contact with the inner surface of the swaging portion 111b and may be in contact with the pipe 210. Further, in the assembly process, the first swaging portion 111b having a reduced outer diameter may be deformed in a direction in which the outer diameter is reduced, for example, a first ring portion 15a (a rear end of the first ring portion 15a) and a first The outer diameter is reduced by the difference in the inner diameter of the two ring portions 15b (the rear end of the second ring portion 15b) and can be in contact with the pipe 210. According to this, at least a portion of the first swaging portion 111a and the connecting portion 111c is primarily reduced in outer diameter (constant amount) by at least a portion of the second ring portion 15b and the second tapered portion 15d to be described later in the assembly process. It can be said that the outer diameter is finally reduced by at least a portion of the first ring portion 15a and the first taper portion 15c to be described later in the swaging process.

For reference, in the swaging completion state, when the inner circumferential surface of the first ring portion 15a contacts the outer circumferential surface of the first swaging portion 111a, the inner circumferential surface of the second ring portion 15b is the outer circumferential surface of the second swaging portion 111b The distance between the first swaging portion 111a and the second swaging portion 111b is such that the second ring portion (when the inner circumferential surface of the first ring portion 15a contacts the outer peripheral surface of the first swaging portion 111a The inner circumferential surface of 15b) may be set at an interval in contact with the outer circumferential surface of the second swaging portion 111b.

In addition, in the swaging process, at least a portion of the swage ring 15 (the second ring portion 15b and the inner surface of the second taper portion 15d to be described later) and at least a portion of the outer body 11 (second swaging portion) A contact stress is generated between the outer surfaces of the (111b) and the extension 111d, and the inner surface and the outer part of the other part of the swage ring 15 (the first ring portion 15a and the first taper portion 15c to be described later) A contact stress occurs between the other part of the body 11 (at least a part of the first swaging part 111a and the outer surface of the connecting part 111c), and thus the swage ring 15 and the outer body ( 11) can be strongly combined.

In addition, referring to FIG. 3, in the swaging completion state, the first inner portion 112 and the second inner portion 113 can contact and press the outer circumferential surface of the pipe end, so that the first ring portion 15a is first The inner diameter of which the inner diameter of the ring is reduced by twice the thickness of the first swaging and the inner diameter of which the inner diameter of the second ring of the second ring portion 15b is reduced by twice the thickness of the second swaging may be smaller than the outer diameter of the pipe end. Accordingly, the second swaging portion 111b may be deformed in a direction in which the outer diameter is reduced by swaging by the second ring portion 15b to contact and press the pipe end in the swaging completion state, and the first swaging portion (111a) is deformed in the direction in which the outer diameter is reduced by swaging by the first ring portion (15a) can contact and press the pipe end in the swaging complete state.

In addition, referring to FIGS. 2 and 3, the swage ring 15 includes a first taper portion 15c and a front connecting the first ring portion 15a and the second ring portion 15b so that the inner diameter expands toward the front. It may include a second tapered portion (15d) extending forward from the front end of the second ring portion (15b) so that the inner diameter is expanded toward the. Accordingly, in the assembly process, the connecting portion 111c may be plastically deformed into a gentle slope by being plastically deformed in correspondence with the inner shape of the second tapered portion 15d and the second ring portion 15b of the swage ring 15. have. By plastic deformation in the assembly process, the connecting portion 111c may induce the swaging of the second swaging portion 111b of the second ring portion 15b to proceed smoothly in the swaging process. In addition, in the swaging process, the extended portion 111d may be plastically deformed in correspondence to the inner surface shape of at least a portion of the second tapered portion 15d and the second ring portion 15b, and the connecting portion 111c is the first tapered It may be plastically deformed corresponding to the inner surface shape of the portion 15c and the first ring portion 15a, the first ring portion 15a, the first taper portion 15c, the second ring portion 15b, and the second taper portion ( 15d) may have an optimized spline so that the outer surface of the outer body 11 and the inner surface of the swage ring 15 are in close contact, or, each inner surface has a change in slope of the inner surface of the swage ring 15 of 2 Can be formed to secure more than one dog.

Also, referring to FIG. 4, in the pre-assembly state before the swage ring 15 is assembled to the outer body 11, the first swaging portion 111a and the connecting portion 111c are continuously constant along the front-rear direction. A constant outer diameter section 111e having an outer diameter may be formed. The constant outer diameter of the constant outer diameter section 111e may be the maximum outer diameter of the first swaging part 111a and the connecting part 111c. In addition, referring to FIGS. 3 and 4 together, the extension portion 111d of the pipe mounting part 111 has a constant outer diameter of a constant outer diameter section 111e in which pressure by the second tapered portion 15d is completed in the swaging state. The groove portion 114 recessed to have a smaller outer diameter than the constant outer diameter may be formed corresponding to the pressing region of the second tapered portion 15d so as to be reduced than when the same outer diameter as. Referring to FIG. 3, when the swaging is completed, the pipe connection structure and the pipe 210 can be fastened by pressing only the pipe 210 of the first swaging unit 111a and the second swaging unit 111b. . Accordingly, in the swaging process, a large external force acting on the extended portion 111d of the swage ring 15 may be unnecessary, and the groove portion 114 is formed to be recessed to have an outer diameter smaller than a certain outer diameter section 111e. , It is possible to prevent excessive external force action of the swage ring 15 to the extension portion 111d. That is, the groove portion 114 acts as an external force to the unnecessary outer body 11 by the swage ring (at least part of the second ring portion 15b and the second tapered portion 15d) at the time when the swaging is completed, and It can serve to prevent unnecessary plastic deformation of the outer body 11. In addition, in order to further increase the effect by the groove portion 114, the groove portion 114, if necessary, at least a part of the groove portion 114 in the swaging completion state of the pressing region of the second ring portion 15b It may be formed to correspond to at least a part.

The recessed shape of the groove portion 114 may be formed such that the groove portion 114 contacts at least a portion of the second tapered portion 15d in the swaging completion state. In other words, the groove portion 15 may be formed to be in close contact with at least a portion of the inner surface of the swedge ring 15, at least a portion of which is in contact with at least a portion of the swath after completion of the swaging.

In addition, according to the above, the outer diameter of the first swaging portion 111a and the second swaging portion 111b of the outer body 11 is made of an appropriate mechanical coupling (fastening) to the pipe after completion of the swaging. It is preferable that it is determined by the thickness of the 1 swaging portion (111a) and the second swaging portion (111b). In addition, the thickness of the swage ring 15 may be determined by the thickness of the swage ring 15 capable of sufficiently maintaining the contact stress between the outer body 11 and the pipe 210.

In addition, referring to FIGS. 2 and 3, the inner surface of the front end of the outer body 11 protrudes inward of the outer body 11 to limit the stopper protrusions that restrict movement of the pipe 210 to the front. Granted) may be formed along the circumferential direction of the outer body 11.

FIG. 6 is a schematic cross-sectional view of an outer body formed with a swage ring and an outer protrusion formed at a lower end of a front end of a pipe connecting device according to an embodiment of the present application before assembly, and FIG. 7 is a lower front end of a front end. It is a schematic cross-sectional view of a pipe connecting device according to an embodiment of the present application including a formed swage ring and an outer body on which an outer protrusion is formed and in a swaging state.

6 and 7, the swage ring 15 may be formed in a slope shape in which the outer diameter decreases as the lower end 151 of the front end surface connected to the inner circumferential surface moves forward. In addition, the extension portion 111d of the pipe mounting part 111 may be formed with an outer protrusion 115 having a rear end surface in contact with the lower surface 151 of the front end surface of the swage ring 15 in the swaging completion state. have. In addition, the rear end surface of the outer protrusion 115 may be formed to reduce the outer diameter of the lower end surface 151 of the swage ring 15 or to limit the increase in the outer diameter of the lower end surface of the swage ring 15. . For example, a groove engaging with at least a portion of the lower surface 151 of the front surface of the swage ring 15 may be formed in the outer protrusion 115, and the groove and the lower surface of the front surface 151 of the swage ring 15 may be formed. The outer protrusion 115 may contact at least a portion of the lower surface 151 of the front end of the swage ring 15 through at least a portion of the engagement. For example, at least a portion of the swage ring 15 is deformed in the elastic region when deformation occurs due to swaging, and at least a portion of the deformed in the elastic region after the completion of swaging is elastically deformed and recovered in the direction in which the outer diameter increases. Can. For example, according to the conventional swaging, in the process of causing the plastic deformation of the outer body and the pipe, the swage ring receives a force that increases in the outer diameter direction, thereby reducing the contact stress between the swage ring and the outer body. By doing so, a factor that decreases the hermetic performance by reducing the contact stress between the inner protrusion protruding inward from the inner surface of the outer body and the outer surface of the pipe could occur. On the other hand, the pipe connecting device combines the lower surface 151 and the outer protrusion 115 of the front surface of the swage ring 15 in the form of a slope, so that the outer protrusion 115 has a lower surface ( 151) to increase the contact stress between the outer surface of the swede ring 15 and the outer body 11 by causing the swage ring 15 to act on the external force in the direction in which the outer diameter decreases or the outer diameter increases. Through this, it is possible to improve the airtight performance by increasing the contact stress of the inner surface of each of the first inner protrusion 112 and the second inner protrusion 113 of the outer body 11 and the outer surface of the pipe 210. have. To this end, the thickness (minimum thickness) of the outer protrusion 115 may be set to a thickness capable of transmitting a sufficient force to the lower portion of the front end contacting the outer protrusion 115 of the swage ring 15.

8 is a schematic cross-sectional view of a pipe connection device according to an embodiment of the present application shown with a fastening tool to illustrate other pipe mounting parts and fastening tools, and FIG. 9 is an elbow type pipe according to an embodiment of the present application Fig. 10 is a schematic cross-sectional view of a connection device, and Fig. 10 is a schematic cross-sectional view of a pipe connection device according to an embodiment of the present application of a union tee type, and Fig. 11 is an embodiment of the present application shown with a fastening tool to illustrate a fastening tool It is a schematic sectional view of a pipe connecting device according to an example.

Also, referring to FIGS. 8 to 10, the outer body 11 may include other pipe mounting parts into which ends of the other pipes 220 and 230 are inserted from different directions. The other pipe mounting part may include a pipe insertion space opened in a direction in which other pipes 220 and 230 are inserted. For example, referring to FIG. 8, when the other pipe 220 is inserted from the front, the pipe insertion space of the other pipe mounting part may be opened forward. In addition, referring to FIG. 9, the pipe connecting device is formed of an elbow type to connect the pipe 210 to another pipe 220 disposed at a 90° angle with the pipe 210, or refer to FIG. 10. If it is, it is formed of a union tee type so that the pipe 210 can be connected to the two pipes 220 and 230. Even in this case, the pipe insertion space of the other pipe mounting part may be opened in the direction in which the other pipes 220 and 230 are inserted. Other pipe mounting parts are the same as or corresponding to the above-described pipe mounting parts 111, so detailed descriptions thereof will be omitted. As described above, in the present pipe connection device, the outer body 11 may be implemented (formed, manufactured) in various forms as necessary in connection with the pipe 210. For example, when the outer body 110 is implemented in the form of the elbow (do-elbow) type described above, the pipe connecting device can fasten the pipe 210 and the other pipe 220 at an angle of 90°, When the outer body 11 is implemented in the form of a union tee (do-union tee) type, the pipe connecting device may connect the branch pipe 230 to the pipe 210 and the other pipe 220 connected in series. will be. In addition, the pipe connecting device may include other swage rings provided for other pipe mounting parts. The other swage ring is the same or the same configuration as the above-described swage ring 15, so a detailed description thereof will be omitted.

Also, referring to FIGS. 8 and 11, in the present pipe connecting device, the movement of the swage ring 15 may be performed by the fastening tool 2. For example, referring to FIGS. 8 and 11, the fastening tool 2 may include a rear support unit 21 that contacts the rear end surface of the swage ring 15. In addition, referring to FIG. 11, the fastening tool 2 is provided with a rear support unit 21 such that the swage ring 15 is moved from the rear of the outer body 11 to a position surrounding at least a portion of the outer body 11. It may include a driving unit 23 for providing an axial compression force by the driving force and the driving force to move relative to the front. In addition, referring to FIG. 11, a drive unit placing portion 117 in which the driving unit 23 is disposed may be formed on an outer circumferential surface in front of the extending portion 111d of the outer body 11. For example, the drive unit arrangement 117 is formed to mesh with the lower portion of the drive unit 23, it may be formed to limit the movement of the drive unit 23 to the rear. That is, a driving unit arrangement 117 serving as a predetermined support is formed on the outer surface of the outer body (pipe mounting part 111) 11, so that the fastening tool 2 is provided with the rear and outer sides of the swage ring 15. Supporting the drive unit arrangement portion 117 on the outer surface of the body 11, the swage ring 15 can be fastened to the outer body 11. Also, referring to FIG. 8, the fastening tool 2 may include a front support unit 22 that contacts the front end surface of another swage ring. Since the front support unit 22 is configured to correspond to the rear support unit 21, detailed description is omitted. In addition, the present pipe connection may include the fastening tool 2 described above.

According to the above, the present pipe connecting device can exert the following effects in relation to the processing form.

According to the conventional swaging pipe connection device, the remaining part of the outer surface of the outer body had to be cut to form a slope-like protrusion on the outer surface of the outer body, but according to the pipe connecting device, firing in the assembly process Since the shape of the slope that induces (helps) swaging by deformation can be formed, outer surface processing of the outer body 11 is reduced to a minimum, and raw material consumption and processing cost in manufacturing can be greatly reduced.

In addition, according to the present pipe connecting device, since the outer surface of the outer body 11 can be configured in a simple form, it is possible to manufacture the outer surface portion of the outer body 11 in a form such as rolled or forged, out of the conventional cutting method. Since it can be reduced, the productivity of the product and the effect of reducing the processing cost can be exerted, and mechanical performance, such as the strength of the product, can also be exhibited by applying a processing method such as rolling or forging.

In addition, even with regard to the swaging aspect, the pipe connecting device disclosed in the inventor's existing application (No. 10-2017-0028909) of the present application, the first and second swage regions of the outer body sequentially outside the pipe With the structure in which the contact is made, the movement distance of the swage ring required for swaging is required as much as the distance from the first swage area to the second swage area. On the other hand, according to the pipe connecting device, at the time when the assembly of the swede ring 15 and the outer body 11 is completed, at least a portion of the swede ring 15 is positioned just before the entry of the second swaging portion 111b. Since it can be located in the (backward portion of the second swaging portion 111b), the length of the moving distance of the swedging ring 15 required for swaging corresponds to the second swaging portion 111b (second swaging portion) (111b) area), and accordingly, the length of the pipe connecting device before swaging can also be reduced, which can be advantageous in reducing the weight and size of the tool for swaging. In one example, according to the present pipe connection device, the operator purchases the pipe connection device in an assembled state, inserts the pipe 210 into the outer body 11, and is located immediately before entry of the second swaging unit 111b. Since the swage ring 15 can be swung by moving, it will be possible to easily swage while reducing the weight and size of the fastening tool for swaging.

In addition, according to the pipe connecting device, since the slope of the outer surface of the outer body 11 is formed in the assembly process and may be formed in a surface contact form in close contact with the inner surface of the swede ring 15, the outer body in the swaging process Compared to the conventional swaging pipe connection device that contacts the outer surface in a linear form, it can perform swaging with less force, reducing the energy consumed by the tool, and is necessary to prevent deformation of the tool during the swaging process. Since the structural rigidity of the tool can be reduced, the weight of the tool can also be reduced.

In addition, in the conventional swaging pipe connection device, an empty space was formed between the outer body outer surface portion and the inner surface of the swage ring by a projection having a slope shape on the outer surface in the swaging completion state. On the other hand, according to the pipe connecting device, the outer surface (outer surface portion) of the outer body 11 can be brought into close contact with the inner surface (inner surface portion) of the swage ring 15 in the swaging completion state, and the tightening is completed (pipe Since the force applied from the inside/outside of the pipe 210 after the connection (fastening) is completed can be uniformly (evenly) distributed through the outer surface of the outer body 11 to the inner surface of the swage ring 15, this pipe The mechanical stiffness of the connecting device can be improved, so that it can have high resistance to external forces such as vibration and shock in the pipe connection.

The above description of the present application is for illustrative purposes, and those skilled in the art to which the present application pertains will understand that it is possible to easily modify to other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the claims, which will be described later, rather than the detailed description, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted to be included in the scope of the present application.

11: outer body
111: pipe mounting parts
111a: first swaging unit
111b: second swaging unit
111c: connection
111d: extension
112: first inner protrusion
113: second inner projection
114: groove
115: outer protrusion
117: drive unit arrangement
15: Swage ring
15a: first ring portion
15b: second ring portion
15c: 1st taper part
15d: second tapered portion
151: lower front surface of the swage ring
210: pipe
220: another pipe
230: another pipe
2: fastening tool
21: rear support unit
22: front support unit
23: drive unit

Claims (9)

In the pipe connection device,
An outer body having a pipe mounting part having a pipe insertion space opened rearward to allow insertion of a pipe end; And
A swage ring surrounding, contacting and pressing at least a portion of the pipe mounting part,
The pipe mounting part includes: a first swaging part having a first inner protrusion, a second swaging part having a second inner protrusion and spaced forward from the first swaging part, the first swaging part and the first 2 includes a connecting portion connecting the swaging portion, and an extending portion extending forwardly from the second swaging portion,
The swage ring has a first ring portion having a first ring inner diameter with a front end larger than the outer diameter of the pipe end, and a second ring having a second ring inner diameter with a front end larger than the first ring inner diameter. It includes a ring portion, the lower end of the front end surface connected to the inner circumferential surface is formed in a slope shape in which the outer diameter decreases toward the front,
The first swaging thickness, which is the thickness from the outer circumferential surface of the first swaging portion to the protruding end of the first inner protrusion, is the second swath from the outer circumferential surface of the second swaging portion to the protruding end of the second inner protrusion. Less than the thickness of the wedge,
In the extension portion of the pipe mounting part, an outer protrusion having a rear end surface in contact with a lower end of the front end surface of the swage ring in a swaging completion state is formed,
The rear end face of the outer protrusion is formed to reduce the outer diameter of the lower front surface of the swage ring or limit the increase in outer diameter of the lower front surface of the swage ring. According to claim 1,
The first inner protruding portion and the second inner protruding portion in a swaging completion state in which the inner peripheral surface of the first ring portion contacts the outer peripheral surface of the first swaging portion and the inner peripheral surface of the second ring portion contacts the outer peripheral surface of the second swaging portion Reduce the inner diameter of the first ring by twice the thickness of the first swaging and the inner diameter of the second ring by twice the thickness of the second swaging so that the outer circumferential surface of the pipe end can be contacted and pressed. One inner diameter is smaller than the outer diameter of the pipe end, the pipe connecting device. According to claim 2,
A second protruding inner diameter of the protruding end of the second inner protruding portion so that the pipe end can be inserted into the pipe inserting space in a state in which the inner circumferential surface of the second ring portion is assembled between the parts in contact with the outer circumferential surface of the first swaging portion; An inner diameter in which the inner diameter of the second ring is reduced by twice the thickness of the first swaging, that is, the outer diameter of the pipe end or more. According to claim 3,
The swage ring includes a first taper portion connecting the first ring portion and the second ring portion so that the inner diameter expands toward the front, and a second extending forward from the front end of the second ring portion such that the inner diameter expands toward the front. A pipe connecting device comprising a tapered portion. According to claim 4,
The second taper starting inner diameter of the front end of the second taper portion is a pipe connecting device that is greater than or equal to the maximum outer diameter of the pipe mounting part. The method of claim 5,
In the pre-assembly state before the swage ring is assembled to the outer body, the maximum outer diameter of the first swaging part and the connection part is greater than the second ring inner diameter. The method of claim 6,
In the pre-assembly state, a constant outer diameter section having a constant outer diameter is continuously formed along the front-back direction in the first swaging part and the connection part,
The constant outer diameter of the first swaging portion and the maximum outer diameter of the connecting portion, the pipe connection device. The method of claim 7,
In the extension portion of the pipe mounting part, the groove portion recessed to have an outer diameter smaller than the constant outer diameter so that the pressure by the second tapered portion in the swaging completion state is reduced than when the outer diameter is the same as the constant outer diameter. A pipe connecting device, which is formed corresponding to the pressing region of the 2 tapered portion. delete

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