TW202244419A - Pipe fitting fixing device for pipe joint - Google Patents

Abstract

The present invention provides a pipe fitting fixing device for pipe joint, which despite its simple structure, it can increase the force of preventing the pipe fitting from detaching without inserting an in-core. It is equipped with a tilting mechanism so that when the stop ring connection part and the opposite part are in contact with each other, the stop ring is tilted in the direction of the pipe axis relative to a reference plane orthogonal to the center axis of the ring body so that the circumferential end of the ring body is close to the body of the joint and the circumferential central part of the ring body is separated from the body of the joint. The first surface of the opposing part is parallel to the datum surface opposite to the stop ring connection part. The second surfaces of the plural stop ring connection part and the opposing part are each located in the same inclined plane opposite to the reference plane in the direction of the pipe axis. The distance between the first surface and the inclined surface increases from the end of the circumferential direction to the center of the circumferential direction.

Description

Fitting fixtures for pipe joints

The present invention relates to a pipe fitting fixing device for a pipe joint, in particular to a pipe fitting fixing device comprising: a stop ring, which reduces the diameter of a C-shaped ring body by a fastening device, and is fastened on the outer peripheral surface of a joint pipe ; a pressure ring, which presses the gasket on the socket portion of the joint body; and a connection device, the stop ring and the pressure ring are connected to the pipe fitting fixing device of the pipe joint of the joint body.

Conventionally, as a pipe fixing device for a pipe joint as described above, for example, a pipe fixing device for a pipe joint described in Japanese Patent Document 1 is known. In the conventional pipe fixing device, as shown in FIG. 28, when a tensile force is generated along the pipe axis direction X in the joint pipe 100, the plane of the stop ring connecting portion 32' of the stop ring 3' and the plane of the connection device 5' The flat surfaces of the flange portions 54' abut against each other to resist pulling forces. In conventional pipe fixing devices, in some cases an in-corn may be inserted into the joint pipe to increase the force for preventing the pipe from coming off. However, in order to improve workability and the like, it is desired to further increase the force for preventing the pipe from coming off without inserting the core.

[Patent Document]

Patent Document 1: Japanese Patent Laid-Open No. 2015-190608

In view of such conventional circumstances, an object of the present invention is to provide a pipe fitting fixing device for a pipe joint that can further increase the force to prevent the pipe from coming off without inserting an in-core despite its simple structure.

In order to achieve the above object, the pipe fitting fixing device of the pipe joint according to the present invention is characterized by comprising: a stop ring, the diameter of the C-shaped annular body is reduced by a fastening device, and fastened to the outer peripheral surface of the joint pipe upper; a pressure ring, which presses the gasket on the socket part of the joint body; and a connecting device, the stop ring and the pressure ring are connected to the joint body, wherein the stop ring has: a pair of protrusions, set At the two circumferential ends of the ring body, there are through holes through the fastening device; the teeth are arranged inside the ring body, and the diameter of the fastening device is reduced to bite into the joint pipe; and A plurality of stop ring connecting parts are arranged at appropriate intervals along the circumferential direction of the ring body and have a stop ring through part passing through the connecting device. The pressing ring has a plurality of pressing ring connecting parts, and the plurality of pressing rings are connected The part has a pressure ring through hole, and the pressure ring through hole faces the connecting parts of the plurality of stop rings in the direction of the tube axis, and passes through the connecting device. The through hole and the pressure ring through hole; and the second through member, which is provided with: a connecting part that passes through the stop ring through part and is connected to the first through member; and an opposing part that faces along the tube axis direction The stop ring connection part is equipped with a tilting mechanism when the ring body is reduced in diameter by the fastening device. When the stop ring connection part and the opposing part are in contact with each other, the stop ring The moving ring is inclined along the direction of the tube axis with respect to the reference plane orthogonal to the central axis of the ring body, so that the circumferential end of the ring body is close to the joint body, and the circumferential central part of the ring body is separated from the The joint body is separated, the first surface of the opposing portion opposite to the stop ring connection portion is parallel to the reference plane, and the second surfaces of the plurality of stop ring connection portions opposite to the opposite portion are respectively located opposite to The reference plane is the same inclined surface inclined in the direction of the pipe axis, and the distance between the first surface and the inclined surface increases from the end portion in the circumferential direction to the central portion in the circumferential direction.

According to the above structure, the connection device has: a first through member, a through hole through the joint body and a pressure ring through hole; The first penetrating member; and the opposing portion face the stop ring connecting portion along the pipe axis direction. The first surface of the opposite part and the stop ring connection part is parallel to the reference plane perpendicular to the central axis of the ring body, and the second surfaces of the plurality of stop ring connection parts and the opposite part are respectively located relative to the reference plane. For the same inclined surface whose surface is inclined in the direction of the pipe axis, the distance between the first surface and the inclined surface increases from the end portions in the circumferential direction toward the central portion in the circumferential direction. Here, in the state where the diameter of the ring body is reduced by the fastening device, since the teeth of the snap ring are better located on the side of the circumferential end where the fastening device is located than on the side of the circumferential center of the ring body Since the tube is snapped into place, a larger force for preventing the pipe from coming off will be generated at the ends in the circumferential direction than at the central portion in the circumferential direction. Therefore, when a pipe pulling force is applied to the joint pipe, the joint pipe extends more on the circumferential end side than the circumferential center portion, and the stop ring connection portion and the opposing portion contact each other. When further pipe tension is applied, due to the distance (gap) between the first surface and the inclined surface, the tilting mechanism tilts the stop ring in the direction of the tube axis relative to the reference plane, thereby bringing the circumferential end of the ring closer to the joint body, and the circumferential central portion of the ring is separated from the joint body. As a result, the rings bite into the circumferential end side and the circumferential center side of the joint pipe respectively, and deform (bend) the joint pipe. This deformation of the spliced pipe becomes a large resistance to the pulling force of the pipe. Furthermore, the inclination of the snap ring also increases the degree of engagement of the teeth in the vicinity of the central portion in the circumferential direction. Therefore, the deformation of the ring body and the bite of the teeth will become a large resistance to the pulling force of the pipe, and can significantly increase the force to prevent the pipe from coming off.

In addition, as a first embodiment, the plurality of stop ring connecting parts have: a pair of first stop ring connecting parts adjacent to the pair of protrusions; and a pair of second stop ring connecting parts adjacent to each other. Adjacent to the pair of first snap ring connecting portions, the pair of first snap ring connecting portions and the pair of second snap ring connecting portions are relative to a center line connecting the central axis and the circumferential central portion Arranged in a line-symmetric manner, the first stop ring penetration part of the first stop ring connection part can be a long hole, and the long hole is that the connection part can slide along the circumferential direction of the ring body and has a width wider than the opposite part Narrow, the second stop ring penetration part of the second stop ring connection part is a long hole, the long hole means that the connection part can slide along the direction of the center line and the width is narrower than the opposite part.

The first stop ring penetration part of the first stop ring connection part is a long hole, the long hole system connection part can slide along the circumferential direction of the ring body and the width is narrower than the opposite part, and the second stop ring connection part The through part of the second stop ring is a long hole, the connecting part can slide along the direction of the center line, and the width of the long hole is narrower than that of the opposite part. As a result, when reducing the diameter of the stop ring, the connection portion passing through the through portion of the stop ring does not hinder the diameter reduction, and the diameter can be smoothly reduced along the elongated hole. In addition, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In addition, as a second embodiment, the plurality of stop ring connecting parts have: a pair of first stop ring connecting parts adjacent to the pair of protrusions; and a second stop ring connecting part located on the circumference direction central portion, the pair of first snap ring connecting portions are arranged in a line-symmetric manner with respect to the center line connecting the central axis and the circumferential central portion, and the first snap ring of the first snap ring connecting portion penetrates through The part is a long hole, and the long hole is that the connection part can slide along the circumferential direction of the ring body and the width is narrower than the opposite part, and the second stop ring through part of the second stop ring connection part can be a long hole , the long hole means that the connecting part can slide along the direction of the center line and has a narrower width than the opposite part.

The first stop ring penetration part of the first stop ring connection part is a long hole, the long hole system connection part can slide along the circumferential direction of the ring body and the width is narrower than the opposite part, the second stop ring connection part of the second stop ring The through parts of the two stop rings are elongated holes, and the elongated holes are connecting parts that can slide along the direction of the centerline and are narrower in width than the opposite parts. As a result, when reducing the diameter of the stop ring, the connection portion passing through the through portion of the stop ring does not hinder the diameter reduction, and the diameter can be smoothly reduced along the elongated hole. In addition, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In addition, as a third embodiment, the plurality of stop ring connecting parts are composed of a pair of stop ring connecting parts located in the center between the circumferential central part and the circumferential end of the ring body, the A pair of stop ring connecting parts are arranged symmetrically with respect to the center line connecting the central axis and the central part in the circumferential direction, and the stop ring through part of the stop ring connecting part can be a long hole or one side with an opening The recess, the long hole or the recess is that the connecting part is slidable and narrower in width than the opposite part.

The first stop ring penetration part of the first stop ring connection part is a long hole or a concave part with an opening on one side, and the long hole or the concave part is slidable for the connecting part and narrower in width than the opposite part. As a result, when reducing the diameter of the stop ring, the connection portion passing through the through portion of the stop ring does not hinder the diameter reduction, and the diameter can be smoothly reduced along the elongated hole. In addition, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In addition, as a fourth embodiment, the plurality of snap ring connecting portions include: a pair of first snap ring connecting portions adjacent to the pair of protrusions; a pair of first snap ring connecting portions adjacent to the central portion in the circumferential direction; a pair of second stop ring connection parts; and a pair of third stop ring connection parts located between the first stop ring connection part and the second stop ring connection part, the pair of first stop ring connection parts part, the pair of second stop ring connecting parts and the pair of third stop ring connecting parts are arranged in a line-symmetrical manner with respect to the center line connecting the central axis and the central part in the circumferential direction, and each of the stop rings is connected The stop ring through part of the part can be a long hole, and the long hole means that the connecting part can slide along the circumferential direction of the ring body and the width is narrower than that of the opposite part.

The stop ring penetrating part of each stop ring connecting part is a long hole, and the long hole means that the connecting part can slide along the circumferential direction of the ring body and has a narrower width than the opposite part. As a result, when reducing the diameter of the stop ring, the connection portion passing through the through portion of the stop ring does not hinder the diameter reduction, and the diameter can be smoothly reduced along the elongated hole. In addition, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

Moreover, as a fifth embodiment, in addition to the above-mentioned first embodiment, the plurality of stop ring connecting parts are further equipped with a pair of third stop ring connecting parts, which are located between the first stop ring connecting part and the second stop ring connecting part. Between the stop ring connecting parts, the pair of third stop ring connecting parts is arranged in a line-symmetrical manner with respect to the center line connecting the central axis and the central part in the circumferential direction, and the third stop ring connecting parts of the third stop ring connecting parts The through parts of the three stop rings can be long holes, and the long holes mean that the connecting part can slide along the circumferential direction of the ring body and the width is narrower than that of the opposite part.

The first and third stop ring through parts of the first and third stop ring connection parts are long holes, and the long holes are that the connection part can slide along the circumferential direction of the ring body and the width is narrower than the facing part. In addition, the second stop ring The second stop ring penetration part of the two stop ring connecting parts is a long hole, the long hole is the connecting part can slide along the direction of the center line and the width is narrower than the facing part. As a result, when reducing the diameter of the stop ring, the connection portion passing through the through portion of the stop ring does not hinder the diameter reduction, and the diameter can be smoothly reduced along the elongated hole. In addition, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In any one of the above embodiments, the junction pipe is a high-performance polyethylene pipe (HPPE/PE100) with a nominal diameter greater than or equal to 100. In addition, in other embodiments, the joint pipe can be a high performance polyethylene pipe (HPPE/PE100) with a nominal diameter greater than or equal to 75.

In any one of the above embodiments, the first through member may be a T-bolt, and the second through member may be a flanged cap nut (cap nut). If so, the connecting device may further be provided with a contact member, and the first penetrating member passes through and contacts the connecting portion and the pressure ring connecting portion. Due to the contact member, the contact area of the connecting portion of the flanged cap nut with respect to the pressure ring connecting portion becomes wider (larger), and the contact member does not rotate together with the flanged cap nut. Therefore, even if the cap nut with flange comes into contact with the stop ring joint portion when tightening the stopper wheel, the T-bolt and cap nut with flange that are tightened by the contact member can slide smoothly without hindering the movement of the stopper wheel. Reduced diameter. In addition, this makes it easy to adjust the gap (pitch) between the snap ring connection portion and the flange portion without manufacturing the cap nut with flange depending on the thickness (width in the tube axis direction X) of the snap ring connection portion .

In any one of the above embodiments, the inclined surface may be inclined within 5° and greater than 0° relative to the reference plane in the direction of the tube axis. With this angle, the amount of expansion and contraction inside the joint can be ensured, and at the same time, the force to prevent the pipe from coming off can be secured. Since the joint pipe does not come off the packing and cause water leakage, the workability is excellent.

Effect of the present invention:

According to the feature of the pipe fixing device of the pipe joint of the present invention, although its structure is simple, the force for preventing the pipe from coming off can be further increased without inserting the inner core.

Other objects, configurations and effects of the present invention will become apparent from the following parts of the embodiments of the present invention.

In order to have a more complete and clear disclosure of the technical content used in the present invention, the purpose of the invention and the effects achieved, it will be described in detail below, and please also refer to the disclosed drawings and drawing numbers:

A first embodiment of the present invention will now be described in detail with reference to FIGS. 1 to 7 .

[Overview of Device 1]

As shown in FIGS. 1 to 3 , the pipe fixing device 1A according to the first embodiment of the present invention is provided with: a stop ring 3A, the diameter of the approximately C-shaped annular ring body 30A is reduced by a fastening device 9 , and Fastened on the outer peripheral surface of the joint pipe 100; the pressure ring 4A presses the gasket 6 on the socket part 21 of the joint body 2; the connecting device 5 connects the stop ring 3A and the pressure ring 4A to the joint body 2 ; And the tilting mechanism 7 described later.

[Joint pipe 100]

In this embodiment, the joint pipe 100 is used as a high-performance polyethylene pipe (Higher Performance Polyethylene, also known as "HPPE", "third-generation high-density polyethylene pipe"), such as a polyethylene pipe for water supply. The diameter is 150. In the case of a polyethylene pipe including this high-performance polyethylene pipe (PE100), it is difficult to prevent the pipe from coming off unless the diameter of the pipe is slightly reduced from the outer diameter of the pipe via the stop ring 3A. According to the pipe fixing device 1 of the present invention, in such a stretchable and flexible (soft) plastic pipe, the retaining force of the pipe (strength against detachment) is improved without using an inner core and also Improves machinability without hampering diameter reduction.

Furthermore, the so-called PE100 is ISO 9080: Lower 97.5% confidence limit for long-term hydrostatic strength obtained by the method specified in "Plastic pipes and piping systems - Measurement of long-term hydrostatic strength using extrapolation of fitting shape thermoplastic materials" Values are 10.00 to 11.29 MPa and are classified as MRS Minimum Required Strength = 10.0 MPa. In addition, the so-called long-term hydrostatic pressure strength (minimum required strength) refers to the stress value in the circumferential direction that enables the pipeline to withstand a service life of 50 years at 20°, and is calculated (predicted) based on the data of the internal pressure creep test.

For high performance polyethylene pipe (SDR11 PE100), the force to prevent disengagement of the fitting is ensured, relative to the strength of the pipe body, further beyond the specified test load specified for each nominal diameter. Therefore, according to the British water pipe industry standard, the strength of the so-called high-performance polyethylene pipe fittings is as follows: if the nominal diameter is 75, the force to prevent the pipe fitting from detaching is greater than or equal to 40 kN; if the nominal diameter is 100, the force to prevent the pipe fitting from detaching For 77 kN or more, if the nominal diameter is 150, the force to prevent the pipe from coming off is 160 kN or more, the above 3 types are equivalent to type 1, and the joint strength is classified as equal to or higher than the pipe strength. In this embodiment, the forces securing against disengagement of the tubes are even greater than these forces. In addition, high-performance polyethylene pipes are generally not used as exposed pipes, but as buried pipes. Therefore, the pipe fittings will not be bent or deformed by the general use pressure (0.75MPa) or the water pressure leak test (0.5MPa) after construction.

[joint body 2]

As shown in FIGS. 1 to 3 , the joint body 2 has a tapered socket portion 21 and a cavity 22 for positioning the end of the joint pipe 100 , and is provided with a substantially rectangular flange 23 on the outer periphery. At the four corners of the flange 23 are formed through holes 24 through which a first penetration member 51 to be described later passes.

[Stop Ring 3A]

The stop ring 3A, as shown in FIG. 1 to FIG. 3 and FIG. 4A, has a ring body 30A; a pair of protrusions 31, 31 are arranged on two circumferential ends 30x, 30x of the ring body 30A; and plural The snap ring connecting portions 32 are arranged at appropriate intervals along the circumferential direction of the ring body 30A. The protruding piece 31 has a through hole 31 a for passing through the bolt 9 a of the fastening device 9 . The cap nut 9b is screwed to the bolt 9a.

In this embodiment, the snap ring connecting portion 32 is composed of a first snap ring connecting portion 32a adjacent to the protrusion 31 and a second snap ring connecting portion 32a farther away from the protrusion 31 than the first snap ring connecting portion 32a. Two stop ring connecting portions 32b are formed, and a pair is provided in a line-symmetrical manner with respect to the center axis C connecting the stop ring 3A and the center line L of the circumferential center portion 30y.

The first and second snap ring connecting portions 32a, 32b are provided with elongated holes 33a, 33b serving as snap ring penetration portions 33 penetrating through a second penetration member 52 to be described later. As shown in FIG. 1 , the longitudinal direction D1 of the elongated hole 33 a of the first snap ring connecting portion 32 a (the center line d1 of the elongated hole 33 a ) faces the protrusion 31 and intersects the center line L. As shown in FIG. On the other hand, the longitudinal direction D2 of the elongated hole 33b of the second snap ring connecting portion 32b (the center line d2 of the elongated hole 33b ) is parallel to the center line L. As shown in FIG.

The ring body 30A is linearly symmetrical with respect to the central line L, and is provided with a first rib 37 and a second rib 38 protruding outward on the outer surface. The first rib 37 is provided between the first snap ring connecting portion 32a and the second snap ring connecting portion 32b, and gradually becomes thinner from the first snap ring connecting portion 32a toward the second snap ring connecting portion 32b ( becomes lower). The second rib 38 is provided between the pair of second snap ring connection parts 32b, 32b, and is formed to have the same wall thickness (height). The first rib 37 and the second rib 38 enable the diameter of the ring body 30A to be reduced substantially uniformly in the circumferential direction by the fastening device 9 . In addition, on the inner peripheral surface of the ring body 30A, a plurality of tooth parts 39 are formed along the circumferential direction, and the plurality of tooth parts 39 engage the joint pipe 100 by reducing the diameter of the fastening device 9 of the ring body 30A.

[Pressure ring 4A]

As shown in FIGS. 1 to 3 , the pressure ring 4A has: a bearing ring-shaped main body portion 40 ; The first and second pressing ring connecting parts 42a, 42b of the moving ring connecting part 32b. A circular pressure ring through hole 43 through which the first through member 51 passes is provided at the center of the first and second pressure ring connecting portions 42a, 42b. In addition, the first and second pressure ring connecting portions 42a, 42b have the same shape and are arranged at equal intervals of approximately 90° so as to be rotationally symmetrical with respect to the center of the pressure ring 4A. As a result, for example, when the pipe fixing device 1 is disassembled and reassembled, no matter which clamp ring connection part 42 is located relative to the snap ring connection part 32, the connection device 5 can be used for connection and fixing, so workability is good. In addition, the longitudinal direction D1 of the elongated hole 33a is a straight line that connects the position of the pressure ring through hole 43 of the first pressure ring connecting portion 42a with respect to the ring body 30A before and after fastening the stop ring 3A. In addition, the longitudinal direction D2 of the elongated hole 33b is a straight line, which connects the position of the pressure ring through hole 43 of the second pressure ring connecting portion 42b with respect to the ring body 30A before and after fastening the stop ring 3A.

[connection device 5]

As shown in Fig. 1 to Fig. 3 and Fig. 4B, the connecting device 5 has: a first through member 51, which roughly passes through the through hole 24 of the joint body 2 and the through hole 43 of the pressure ring; and a second through member 52, which is provided with: The connecting portion 53 passes through the snap ring through portion 33 (long holes 33a, 33b) and is connected to the first through member 51; and the opposing portion 54 faces the snap ring connecting portion 32 (first, second Two stop ring connecting parts 32a, 32b).

In this embodiment, the first through member 51 is a T-shaped bolt, and the second through member 52 is attached with a flanged cap nut. In this flanged cap nut 52 , the connection portion 53 is a cylindrical portion in which a thread groove 53 a is formed. The facing portion 54 is an annular flange protruding outward from the cylindrical portion 53 . In addition, the connection device 5 further includes a washer 55 as a contact member through which the T-shaped bolt 51 penetrates and contacts the cylindrical portion 53 and the pressure ring connection portion 42 .

In the pipe fixing device 1A, before tightening the ring body 30A (reducing the diameter of the stop ring 3A), the connecting device 5 is used to fix the pressure ring 4A on the joint body 2 (as shown in FIG. 5C ). At this time, the center of the T-bolt 51 and the center of the pressure ring through hole 43 may be misaligned. By placing the washer 55 between the cylindrical portion 53 and the pressure ring connection portion 42, the contact area ratio of the flanged cap nut 52 relative to the pressure ring connection portion 42 makes the end portion 53b of the cylinder portion 53 directly contact The contact area of the pressure ring connecting portion 42 is wide (large). Furthermore, since the flanged cap nut 52 is screwed into the T-bolt 51 , the surface of the press ring connection portion 42 is not damaged by the rotation of the cylindrical portion 53 . Also, the washer 55 is only compressed and does not rotate with the flanged cap nut 52 . Therefore, even if the flanged cap nut 52 comes into contact with the snap ring penetration portion 33 when the snap ring 3A is tightened, the flanged cap nut 52 screwed into the T-bolt 51 can slide smoothly via the washer 55 , and will not interfere with the reduction of the stop ring 3A. In addition, it is not necessary to manufacture the flanged cap nut 52 (cylindrical portion 53 ) according to the thickness (width in the pipe axis direction) of the snap ring connection portion 32 and the gap between the snap ring connection portion 32 and the flange portion 54 can be adjusted. gap (interval B).

[Tilt Mechanism 7]

In this embodiment, the tilting mechanism 7 is when the first and second pressure ring connecting parts 32a, 32b and the flange part 54 contact each other in the state where the diameter of the ring body 30A is reduced by the fastening device 9, the stop ring 3A is inclined along the pipe axis direction X with respect to a reference plane orthogonal to the central axis C of the ring body 30A, so that the circumferential end 30x of the ring body 30A is close to the joint body 2, and the circumferential center portion 30y is separated from the joint body. 2 separation. In other words, in the present invention, the stop ring 3A includes the center axis C of the ring body 30A and is inclined toward a horizontal plane N perpendicular to the center line L connecting the center O of the ring body 30A and the center line L of the circumferential central portion 30y. As mentioned above, due to the use of high-performance polyethylene pipe fittings as buried pipes, no bending or deformation will occur in normal use pressure or water pressure leakage tests. That is, under normal use conditions, when a relatively large pulling force is generated in the pipe, the tilting mechanism 7 will take effect.

As shown in FIGS. 2 and 5B, each first surface 56 of the flange portion 54 facing the snap ring connecting portion 32a, 32b is parallel to the reference plane P (the opposite surface Q indicated by a dotted line in FIG. 5B ). ). On the other hand, the second surfaces 34a, 34b of the first and second snap ring connecting portions 32a, 32b facing the flange portion 54 are located on the same inclined plane inclined at an inclination angle θ with respect to the reference plane P along the pipe axis direction X. PI. The tilt mechanism 7 includes the second surfaces 34a, 34b (inclined surface P1) of the snap ring connecting portion 32 (first, second snap ring connecting portions 32a, 32b) and the first surface of the flange portion (opposing portion) 54. The distance B between the surface 56 and the inclined surface PI becomes larger from the circumferential end portion 30x toward the circumferential central portion 30y. In addition, in FIG. 5B , each first surface 56 is located in the same facing surface Q. As shown in FIG. However, in the state where the snap ring 3A is fastened, a gap is formed between the first surface 56 and the inclined surface PI so that the interval B increases from the circumferential end portion 30x toward the circumferential central portion 30y.

By the way, it is also conceivable that the stop ring 3A is inclined in the pipe axis direction X with respect to the reference plane P so that the circumferential center portion 30y of the ring body 30A is close to the joint body 2 and the circumferential end portion 30x is separated from the joint body. 2 separation, however, in the high-performance polyethylene pipe (SDR11 PE100), when the ring body 30A is reduced in diameter, since the tooth portion 39 of the stop ring 3A is closer to the circumferential end portion 30x side than the circumferential central portion 30y, it is separated from the Since the junction pipe 100 is engaged, the pipe separation prevention performance is greater at the end portion 30x in the circumferential direction than at the central portion 30y in the circumferential direction. When the pipe tension F acts on the pipe, the center portion 30y of the joint body 2 side of the ring body 30A in the circumferential direction bites into the joint pipe 100 due to the inclination of the stop ring 3A, so the tooth portion 39 is at the center portion of the circumferential direction. 30y reduced bite (tooth lift). Then, when the pipe tension F further acts, the joint pipe 100 will be displaced relative to the stop ring 3A on the side of the central portion 30y in the circumferential direction. Therefore, compared with the present embodiment, the effect of increasing the force for preventing the separation of the pipe is reduced due to the inclination of the stop ring 3A. As described above, in the tilting mechanism 7 of the present invention, the circumferential end portion 30x of the ring body 30A is brought close to the joint body 2 , and the circumferential center portion 30y is separated from the joint body 2 .

Here, the inclination angle θ of the inclined plane PI may be inclined at an angle greater than 0° and less than or equal to 5° relative to the reference plane P. Preferably, it is greater than or equal to 1° and less than or equal to 5°. As the inclination angle increases, since the space allowed for inclination also increases, it is necessary to reduce the expansion and contraction amount of the joint pipe 100 . If the junction pipe 100 (nominal diameter 150) in this embodiment is used, it is preferably equal to or greater than 2° and equal to or less than 3°. If the inclination angle exceeds 5°, it becomes difficult to ensure the amount of expansion and contraction of the joint pipe 100 in the joint, and the joint pipe 100 falls off from the packing 6, resulting in water leakage. In addition, in order to secure this inclination angle, it is necessary to extend the cylindrical portion 53 of the flanged cap nut 52 , which increases the manufacturing cost.

According to the tensile test of the inventor's high-performance polyethylene pipe (PE100) with a nominal diameter of 150, when the inclination angle is 0°, the maximum load is 171.9kN. When the inclination angle is 2°, the maximum load is 177.2kN, and when the inclination angle is 3°, the maximum load is 184.4kN. On the other hand, in the known product in which the pressure ring 4A is temporarily fixed and then the stopper ring 3A is fastened, the maximum load is 171.8 kN.

Here, as mentioned above, those classified as Class 1 in the British Plumbing Industry Standards are those with a nominal diameter of 150 and a pipe fitting detachment force of 160 kN or more. Based on this criterion, the conventional product in the above experiment is 171.8-160=11.8kN. On the other hand, in the present invention, 184.4-160=24.4kN, which ensures the force for preventing the pipe from coming off, and the remaining amount is twice that of the conventional product. As described above, compared with the conventional products, especially when the inclination angle is 2° to 3°, it is possible to ensure a telescoping stroke and improve the force of preventing the pipe from coming off.

[Description of pipe tension]

Next, the action of the stop ring 3A and the joint pipe 100 in the pipe fixing device 1A will be described with reference to FIGS. 5 to 7 . FIG. 1 to FIG. 3 show a pipe fixing device 1A, which has an open nut (Open Nut) 9c installed on a pair of protrusions 31,31. Since this state is before tightening the stop ring 3A (before reducing the diameter) and before tightening the connecting device 5 (before the screw groove 53a is tightened), the joint body 2 and the pressure ring 4A are not in contact with each other, and the gasket 6 is not in contact with each other. out of shape.

Next, as shown in FIG. 5, the opening nut 9c is removed, the flanged cap nut 52 is tightened (finally tightened) to the T-bolt 51, and the stop ring 3A and the compression ring 4A are attached to the joint body 2 (The tightening in the thread groove 53a is completed). The end portion 53b of the cylindrical portion 53 is in contact with the washer 55 , and the pressing ring 4A presses the packing 6 against the socket portion 21 , compresses and deforms the socket portion 21 , and also abuts against the joint body 2 . On the other hand, the stop ring 3A has not been tightened yet. At this time, the central axis of each connection device 5 located at one end of the elongated holes 33a, 33b of the stop ring 3A and the center of each pressure ring through hole 43 of the first and second pressure ring connecting parts 42a, 42b coincide with each other . In addition, the center of the snap ring 3A and the center of the pressure ring 4A also coincide. Here, the maximum width (length) W1 of the snap ring connecting portion 32 in the tube axial direction is shorter than the length W2 of the cylindrical portion of the cylindrical portion 55 (the distance from the flange portion 54 to the cylindrical portion end 53 b ). As a result, a gap S is formed between the flange portion 54 and the first and second pressure ring connecting portions 42a and 42b with respect to the first and second snap ring connecting portions 32a and 32b. Therefore, there is no need to manually fasten (temporarily fasten) the connecting device 5 to temporarily fix the pipe before fastening the fastening device 9 of the stop ring 3A as conventionally, and the pressure ring 4A can be securely fastened ( final fastening), and it simplifies the work and has good operability (processability).

Next, as shown in FIG. 2, after the ring 4A is connected to the joint body 2 by the connection device 5, the fastening device 9 of the stop ring 3A is fastened to reduce the diameter of the ring body 30A. Since the outer diameter of the cylindrical portion 53 is smaller than the diameter (width) of the elongated holes 33a, 33b in the short side direction, the flanged cap nuts 52 face each other along the long side directions D1, D2 inside the elongated holes 33a, 33b. Move (slide) at 30A. Therefore, the diameter reduction of the ring body 30A is guided along the orientation direction of the elongated holes 33a, 33b (longitudinal directions D1, D2), and the first and second snap ring connecting portions 32a, 32b follow the diameter reduction of the ring body 30A. move. Then, the central axis of each connecting device 5 moving from one end of the elongated holes 33a, 33b to the other coincides with the center of each pressure ring through hole 43 of the first and second pressure ring connecting parts 42a, 42b. In addition, the centers of the stop ring 3A and the center of the pressure ring 4A, which are reduced in diameter by fastening, also coincide with each other. Therefore, the connecting device 5 does not interfere with diameter reduction, and the ring body 30A is not locally loaded to cause cracks or the like.

Furthermore, due to the above-mentioned gap S, when the diameter of the ring body 30A is reduced, the stop ring connecting portion 32 and the pressure ring connecting portion 42 do not contact each other, and frictional resistance due to the contact does not occur. Therefore, the diameter can be reduced smoothly with low torque and the workability is excellent. Furthermore, since the snap ring 3A is not fixed to the joint body 2 and the first snap ring connecting portion 32 a and the second snap ring connecting portion 32 b are separated from the flange portion 54 , the joint tube 100 can be expanded and contracted.

Then, when the pipe tension F is generated in the joint pipe 100 in the pipe axial direction X after the fixed stop ring 3A is attached, the joint pipe 100 is extended and the stop ring 3A is separated from the pressure ring 4A (the washer 55) . Since the outer diameter of the flange portion 54 is larger than that of the elongated holes 33a, 33b, the flange portion 54 contacts the first stop ring connecting portion 32a and the second stop ring connecting portion 32b, thereby preventing the junction tube 100 from coming off. In the present embodiment, first, the upper end 56a (the circumferential end portion 30x side) of the first surface 56 of the flange portion 54 is brought into contact with the first stop ring connection portion 32a.

Here, in this embodiment, the space (interval B) formed between the flanged cap nut 52 and the first surface 56 of the flange portion 54 is the second surface of the second snap ring connecting portion 32b. 34b is larger than the second surface 34a of the first snap ring connecting portion 32a, and the lower portion (circumferential direction center portion 30y) is larger than the upper portion (circumferential direction end portion 30x side). As described above, between the first surface 56 of the flange portion 54 and the inclined surface PI including the second surfaces 34a, 34b, the interval B increases from the circumferential end 30x to the circumferential center 30y. Therefore, when the pipe tension F is further applied, as shown in FIG. 7, the stop ring 3A starts to incline from the upper end 56a to make the The circumferential end portions 30x are close to the joint body 2 , and the circumferential center portion 30y is away from the joint body 2 . Then, the ring body 30A comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . The resulting deformed part M counteracts the pulling force F of the pipe fitting, and can greatly increase the force for preventing the pipe fitting from coming off.

In addition, the tooth portion 39 of the snap ring 3A is deeply engaged with the joint pipe 100 on the side of the circumferential end portion 30x where the fastening device 9 is located, compared with the vicinity of the circumferential central portion 30y, while the tooth portion 39 of the circumferential central portion 30y Nearby occlusion becomes shallower. When the pipe pulling force F is generated in the stop ring 3A, since the tooth portion 39 bites shallowly near the circumferential center portion 30y, the coupling pipe 100 slides at this portion, and the force for preventing the pipe from coming off is lowered. Therefore, by inclining the stop ring 3A from the upper end 56a side, it is possible to relatively easily incline the stop ring 3A to generate the deformed portion M in the joint pipe 100, thereby further improving the force for preventing the pipe from coming off. In addition, due to the inclination of the stopper ring 3A, the tooth portion 39 of the circumferential center portion 30y further bites into the joining pipe 100, thereby further increasing the force for preventing the pipe from coming off.

In addition, it is also conceivable to use the second surface 34a, 34b of the snap ring connecting portion 32 as a flat surface and the first surface 56 of the flange portion 54 as an inclined surface, and in the same manner as above, let the snap ring 3A is inclined to deform the conjugating tube 100 . However, in this case, it is difficult to tighten the T-bolt 51 and the flanged cap nut 52 so that the first surface 56 of each flange portion 54 is located in the same inclined plane PI. Therefore, in the tilting mechanism 7 of the present invention, the first surface 56 of the flange portion 54 is a flat surface, and the second surface 34 of the stop ring connecting portion 32 is an inclined surface.

<Second embodiment>

Next, a second embodiment of the present invention will be described with reference to FIGS. 8 to 12 . In addition, the same components as those of the above-described embodiment are denoted by the same reference numerals. In the above embodiment, the four stop ring connecting parts 32 (first and second stop ring connecting parts 32a, 32a) are connected to the joint body 2 by the connecting device 5 . However, in the second embodiment, the snap ring 3B has the snap ring connecting portion 32, a pair of first snap ring connecting portions 32a, 32a, and one second snap ring connecting portion 32b1. In this embodiment, the joint pipe 100 has a nominal diameter of 100 . Reference numeral 37B refers to a first rib.

As shown in Fig. 8 to Fig. 10, the second snap ring connecting portion 32b1 is formed with a concave portion 33b1. In the second embodiment, the concave portion 33b1 is located at the central portion 30y in the circumferential direction of the ring body 30B, and one side is an opening as the second Two snap ring through portions 33b. The concave portion 33b1 is narrower than the flange portion 54 and is along the center line L. As shown in FIG. The second surfaces 34a, 34b of the flange portions 54 facing the first snap ring connecting portion 32a and the second snap ring connecting portion 32b1 are located on the same plane inclined at an inclination angle θ relative to the reference plane P along the pipe axis direction X. Face PI. In addition, the inclination angle θ of the inclined plane PI may be inclined at an angle greater than 0° and less than or equal to 5° with respect to the reference plane P. Preferably, it is greater than or equal to 1° and less than or equal to 5°. Also in this embodiment, the space (interval B) formed between the flanged cap nut 52 and the first surface 56 of the flange portion 54 is larger than that of the second surface 34b of the second stop ring connecting portion 32b1. The second surface 34a of the first snap ring connecting portion 32a, and the lower portion (circumferential direction center portion 30y) is larger than the upper portion (circumferential direction end portion 30x side).

As shown in Figure 11, also in this embodiment, use the connecting device 5 to fasten the pressure ring 4B to the joint body 2, and then fasten the fastening device 9 of the stop ring 3B, so that the diameter of the ring body 30B can be reduced . In this embodiment, the flanged cap nut 52 will slide along the longitudinal direction D1 in the long hole 33a. On the other hand, in the circumferential center portion 30y, since the diameter decreases toward the center of the ring body 30B, and the amount of diameter decrease is small, the flanged cap nut 52 slides slightly along the center line L in the concave portion 33b1. Therefore, the connecting device 5 does not hinder the diameter reduction and does not come off from the concave portion 33b1. In addition, instead of the concave portion 33b1 having an opening on the outside, a long hole along the center line L may be used.

In addition, when the pipe tension F is further applied, as shown in FIG. 12 , the stop ring 3B is inclined from the upper end 56a due to the interval B (space) and the inclined plane PI (second surface 34a, 34b ) shown in FIG. 9 . Then, the ring body 30B comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the resulting deformed portion M counteracts the pipe pulling force F, and the tooth portion 39 at the circumferential center portion 30y further bites into the joining pipe 100, the force for preventing the pipe from coming off can be greatly increased.

<Third embodiment>

In addition, in the third embodiment shown in FIGS. 13 to 17 , the snap ring 3C has only two snap ring connecting portions 32 , that is, a pair of first snap ring connecting portions 32 a 2 , 32 a 2 . In this embodiment, the nominal diameter of the connecting pipe 100 is 50 or 75 .

As shown in FIGS. 13 to 15 , a pair of first snap ring connecting portions 32 a 2 , 32 a 2 are located in the middle portion between the circumferential central portion 30 y and the circumferential end 30 x of the ring body 30C, and are aligned with the central line L with respect to the central line L. Symmetrically configured. The first snap ring connecting portion 32a2 is formed with a concave portion 33a2, and in the third embodiment, the concave portion 33a2 serves as the first snap ring through portion 33a with an opening on the outside. The concave portion 33 a 2 is narrower than the flange portion 54 . In this embodiment, the second surface 34 of the first stop ring connecting portion 32 a 2 facing the flange portion 54 is located on the same inclined plane PI inclined at an inclination angle θ with respect to the reference plane P along the pipe axis direction X. The inclination angle θ of the inclined plane PI may be inclined at an angle greater than 0° and less than or equal to 10° with respect to the reference plane P. Preferably, it is greater than or equal to 1° and less than or equal to 6°. In this embodiment, the space (interval B) formed between the first surface 56 of the flange portion 54 of the flanged cap nut 52 and the second surface 34 of the first stop ring connecting portion 32a2 is the lower portion. (circumferential direction central part 30y) is larger than in an upper part (circumferential direction end part 30x side).

As shown in Figure 16, also in this embodiment, the diameter of the ring body 30C can be reduced by using the connecting device 5 to fasten the pressure ring 4C to the joint body 2, and then fasten the fastening device 9 of the stop ring 3C. . In this embodiment, the flanged cap nut 52 slides along the center line L in the recess 33 a 2 . Therefore, the coupling device 5 does not hinder the diameter reduction and does not come off from the recessed portion 33a2. In addition, instead of the concave portion 33a2 having an opening on the outside, a long hole along the center line L may be used. In addition, in this embodiment, the opening width of the recessed portion 33a2 is the same as the width of the inner portion of the recessed portion 33a2, but the opening width may be formed narrower than the inner width. The shape of the recessed portion 33a2 is not limited to that of the present embodiment as long as the flanged cap nut 52 can slide in the recessed portion 33a2.

In addition, when the pipe tension F is further applied, as shown in FIG. 17 , the stop ring 3C is inclined from the upper end 56a due to the interval B (space) and the inclined surface PI (second surface 34a) shown in FIG. 14 . Then, the ring body 30C comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the resulting deformed portion M counteracts the pipe pulling force F, and the tooth portion 39 at the circumferential center portion 30y further bites into the joining pipe 100, the force for preventing the pipe from coming off can be greatly increased.

<Fourth embodiment>

In addition, in the fourth embodiment shown in FIGS. 18 to 22 , the stop ring connection portion 32 of the stop ring 3D includes six connection parts, which are respectively: a pair of first stop ring connection parts 32a, 32a , a pair of second stop ring connecting parts 32b2, 32b2 and a pair of third stop ring connecting parts 32c, 32c, each connecting part is arranged in a pair so as to be symmetrical with respect to the central line L. In addition, in this embodiment, the nominal diameter of the joint pipe 100 is 250 . Reference numerals 37D and 38D refer to a first rib and a second rib, respectively.

As shown in FIGS. 18 to 20 , the second snap ring connecting portion 32 b 2 is located near the central portion 30 y in the circumferential direction of the ring body 30D. In addition, the third snap ring connecting portion 32c is provided at the center between the first snap ring connecting portion 32a and the second snap ring connecting portion 32b2 (along the ring body 30D from the circumferential center portion 30y of the ring body 30D). The circumferential direction of the position differs by 90°). The second snap ring connecting portion 32 b 2 and the third snap ring connecting portion 32 c are provided with elongated holes 33 b 2 , 33 c narrower than the flange portion 54 . The first snap ring connection portion 32a has the same configuration as that of the first embodiment described above.

Here, the longitudinal direction D1 (center line d1) of the elongated hole 33a of the first snap ring connecting portion 32a and the longitudinal direction D3 (center line d3) of the elongated hole 33c of the third snap ring connecting portion 32c are directed toward The protrusion 31 is oriented and intersects the centerline L. As shown in FIG. In addition, the intersection angle α1 between the center line d1 and the center line L is larger than the intersection angle between the center line d3 and the center line L. As shown in FIG. On the other hand, the longitudinal direction D2 (center line d2) of the elongated hole 33b2 of the second snap ring connecting portion 32b2 is oriented toward the third snap ring connecting portion 32c, and is oriented in the same direction as the previous center lines d1, d3. in the opposite direction. In addition, since the central line d2 is slightly parallel to the central line L, the intersecting angle of the central line L is much smaller than the intersecting angle between the central line d3 and the central line L.

The second surfaces 34a, 34b, 34c of the flange portions 54 facing the first, second, and third stop ring connecting portions 32a, 32b2, 32c are positioned at an angle θ in the direction X of the pipe axis relative to the reference plane P. In the same inclined plane PI that is inclined. In addition, the inclination angle θ of the inclined plane PI may be inclined at an angle greater than 0° and less than or equal to 5° with respect to the reference plane P. Preferably, it is greater than or equal to 1° and less than or equal to 4°. Also in this embodiment, the space (interval B) formed between each snap ring connecting portion (inclined surface PI) and the first surface 56 of the flange portion 54 is equal to that of the first snap ring connecting portion 32a. The second surface 34a, the second surface 34c of the third snap ring connecting portion 32c, and the second surface 34b of the second snap ring connecting portion 32b2 are sequentially increased, and the lower portion (circumferential direction central portion 30y) is larger than the upper portion (circumferential direction central portion 30y). end 30x side) large.

As shown in Fig. 21, also in this embodiment, use the connection device 5 to fasten the pressure ring 4D to the joint body 2, and then fasten the fastening device 9 of the stop ring 3D, so that the diameter of the ring body 30D can be reduced . In this embodiment, when the stop ring 3D is not fastened, the central axis of each connecting device 5 located at one end of the elongated holes 33a, 33b2, 33c of the stop ring 3D and the first, second, second The centers of each pressure ring through hole 43 of the three pressure ring connecting parts 42a, 42b, 42c coincide with each other. In addition, the center of the stop ring 3D and the center of the pressure ring 4D also coincide. Then, when the stop ring 3D is fastened by the fastening device 9 , the flanged cap nuts 52 slide in the long holes 33 a , 33 b 2 , 33 c along the respective longitudinal directions D1 to 3 . Therefore, the diameter reduction of the ring body 30D is guided along the orientation direction of the elongated holes 33a, 33b2, 33c (longitudinal directions D1, D2, D3), and each stop ring connecting portion 32a, 32b2, 33c follows the shrinkage of the ring body 30D. move along the path. Then, the central axis of each connecting device 5 that moves from one end of the elongated hole 33a, 33b2, 33c to the other end is connected to each pressure ring through hole of the first, second, and third pressure ring connecting parts 42a, 42b, 42c. The centers of 43 coincide with each other. The center of the stop ring 3D and the center of the pressure ring 4D, which are reduced in diameter by fastening, also coincide with each other. Therefore, the connection device 5 does not interfere with diameter reduction, and the ring body 30D is not locally loaded to cause cracks or the like.

In addition, when the pipe tension F is further applied, as shown in FIG. 22, the stop ring 3D is inclined from the upper end 56a due to the interval B (space) and the inclined plane PI (second surfaces 34a, 34b, 34c). Then, the ring body 30D comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the resulting deformed portion M counteracts the pipe pulling force F, and the tooth portion 39 at the circumferential center portion 30y further bites into the joining pipe 100, the force for preventing the pipe from coming off can be greatly increased.

<Fifth Embodiment>

In addition, in the fifth embodiment shown in FIGS. 23 to 27 , the stop ring connecting portion 32 of the stop ring 3E includes five connecting parts, which are respectively: a pair of first stop ring connecting parts 32a, 32a , the second snap ring connecting portion 32b3 and a pair of third snap ring connecting portions 32c1, 32c1 located at the central portion 30y in the circumferential direction of the ring body 30E, and each connecting portion is arranged in a pair so as to correspond to the center line L Line symmetry. In addition, in this embodiment, the nominal diameter of the joining pipe 100 is 250 or 300. Element number 37E refers to the first rib.

As shown in FIGS. 23 to 25, the third snap ring connecting portion 32c1 is provided in the middle (center) between the first snap ring connecting portion 32a and the second snap ring connecting portion 32b3. The second snap ring connecting portion 32 b 3 and the third snap ring connecting portion 32 c 1 are provided with elongated holes 33 b 3 , 33 c 1 narrower than the flange portion 54 . In addition, the first snap ring connection portion 32a has the same configuration as that of the second embodiment described above.

Here, the longitudinal direction D1 (center line d1) of the long hole 33a of the first stop ring connecting portion 32a and the long side direction D3 (center line d3) of the long hole 33c1 of the third stop ring connecting portion 32c1 are oriented toward The protrusion 31 is oriented and intersects the centerline L. As shown in FIG. In addition, the intersection angle α1 between the center line d1 and the center line L is larger than the intersection angle between the center line d3 and the center line L. As shown in FIG. On the other hand, the longitudinal direction D2 (center line d2 ) of the long hole 33b3 of the second stop ring connecting portion 32b3 coincides with the center line L. As shown in FIG.

The second surface 34a, 34b, 34c facing the flange portion 54 of the snap ring connection portion 32a, 32b3, 32c1 is located in the same inclined plane PI inclined at an inclination angle θ with respect to the reference plane P along the pipe axis direction X. In addition, the inclination angle θ of the inclined plane PI may be inclined at an angle greater than 0° and less than or equal to 5° with respect to the reference plane P. Preferably, it is greater than or equal to 1° and less than or equal to 4°. Also in this embodiment, the space (interval B) formed between each snap ring connecting portion (inclined surface PI) and the first surface 56 of the flange portion 54 is equal to that of the first snap ring connecting portion 32a. The second surface 34a, the second surface 34c of the third snap ring connecting portion 32c1, and the second surface 34b of the second snap ring connecting portion 32b3 are sequentially increased, and the lower portion (circumferential direction central portion 30y) is larger than the upper portion (circumferential direction central portion 30y). end 30x side) large.

As shown in Fig. 26, also in this embodiment, the diameter of the ring body 30E can be reduced by using the connection device 5 to fasten the pressure ring 4E to the joint body 2, and then fasten the fastening device 9 of the stop ring 3E. . In this embodiment, when the stop ring 3E has not been fastened, the central axis of each connecting device 5 located at one end of the elongated holes 33a, 33b3, 33c1 of the stop ring 3E and the first, second, second The centers of each pressure ring through hole 43 of the three pressure ring connecting parts 42a, 42b, 42c coincide with each other. In addition, the center of the stop ring 3E and the center of the pressure ring 4E also coincide. Then, when the stop ring 3E is fastened by the fastening device 9 , the flanged cap nuts 52 slide in the elongated holes 33 a , 33 b 3 , 33 c 1 along the respective longitudinal directions D1 to 3 . Therefore, the diameter reduction of the ring body 30E is guided along the orientation direction of the elongated holes 33a, 33b3, 33c1 (longitudinal directions D1, D2, D3), and each stop ring connecting portion 32a, 32b3, 32c1 follows the shrinkage of the ring body 30E. move along the path. Then, the central axis of each connecting device 5 that moves from one end of the elongated hole 33a, 33b3, 33c1 to the other end is connected to each pressure ring through hole of the first, second, and third pressure ring connecting parts 42a, 42b, 42c. The centers of 43 coincide with each other. In addition, the centers of the stop ring 3E and the center of the pressure ring 4E, which are reduced in diameter by fastening, also coincide with each other. Therefore, the connecting device 5 does not interfere with diameter reduction, and the ring body 30E is not locally loaded to cause cracks or the like.

In addition, when the pipe tension F is further applied, as shown in FIG. 27, the stop ring 3E is inclined from the upper end 56a due to the interval B (space) and the inclined surface PI (second surfaces 34a, 34b, 34c). Then, the ring body 30E comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the resulting deformed portion M counteracts the pipe pulling force F, and the tooth portion 39 at the circumferential center portion 30y further bites into the joining pipe 100, the force for preventing the pipe from coming off can be greatly increased.

＜Other Examples＞

Finally, the possibility of another embodiment of the invention will be explained.

In each of the above embodiments, the high-performance polyethylene pipe (SDR11 PE100) has been explained as an example of the joint pipe 100 . High-performance polyethylene pipes include SDR13.6, SDR17, and SDR21 in addition to SDR11, depending on the relationship between the outer diameter and wall thickness of the pipe fittings, and can be applied to these high-performance polyethylene pipes. In addition, it can also be applied to cross-linked polyethylene pipes, polypropylene pipes, etc. used for hot water pipes.

In the third embodiment, a third snap ring connecting portion 32c is provided between the first snap ring connecting portion 32a and the second snap ring connecting portion 32b, and these are arranged in pairs so as to align with the center line L Line symmetry. However, the present invention is not limited thereto, and a plurality of pairs of third snap ring connection portions 32c may be provided. For example, first through-members (T-shaped bolts) 51 and second through-members (cap nuts with flanges) 52, for example, eight or ten, may be used to be symmetrical with the centerline L and correspond to Diameter joint pipe.

In the second embodiment, a pair of first stop ring connecting parts 32a, 32a and a second stop ring connecting part 32b1 are provided. However, the present invention is not limited thereto, and a plurality of pairs of third snap ring connection portions 32c may be provided. For example, five or seven first penetrating members (T-bolts) 51 and second penetrating members (cap nuts with flanges) 52 may be used, for example, to be line-symmetrical to the center line L and corresponding to Large diameter joint pipe.

Although the inner core is omitted in each of the embodiments described above, the present invention can be applied even when the inner core is used. Although the inner core prevents the shrinkage of the joint pipe 100, according to the experiment of the inventor, when the tension of the pipe becomes larger, it can be confirmed that the stop ring 3 will be tilted by the tilting mechanism 7, and maintain the joint pipe 100 and the joint body 2 in a coaxial manner . That is, the present invention can be used (shared) regardless of whether an inner core is used, and the versatility is extremely high.

The above-mentioned are only some embodiments of the present invention, and are not intended to limit the present invention. Those made with slight changes and modifications according to the creative spirit and characteristics of the present invention should also be included in the scope of this patent.

To sum up, the embodiment of the present invention can indeed achieve the expected use effect, and the specific technical means disclosed by it have not only never been seen in similar products, nor have they been disclosed before the application. They are fully in line with the requirements of the patent law In terms of regulations and requirements, it is really convenient to file an application for a patent for invention according to the law, and ask for the review and approval of the patent.

1A～E: Fixing device for pipe fittings

2: Connector body

3, 3A, 3B, 3C, 3D, 3E: stop ring

4A, 4B, 4C, 4D, 4E: pressure ring

5: Connection device

6: Liner

7: Tilt mechanism

9: fastening device

9a: Bolt

9b: cap nut

9c: opening nut

21: Socket

22: cavity

23: Flange

24: Through hole

30A, 30B, 30C, 30D, 30E: ring body

30x: Circumferential end

30y: Central part in the circumferential direction

31: Protruding pieces

31a: through hole

32: Stop ring connection part

32a: First stop ring connecting part

32a2: Connecting part of the first snap ring

32b, 32b1, 32b2, 32b3: second stop ring connection part

32c, 32c1: third stop ring connection part

33: Stop ring through part

33a: First stop ring through part (long hole)

33a2: concave part

33b: Second stop ring through part (long hole)

33b1: concave part

33b2, 33b3: long holes

33c: Third stop ring through part (long hole)

33c1: long hole

34, 34a, 34b, 34c: second surface

37: First rib

38: Second rib

39: Tooth

40: Main body

42: Pressure ring connection part

42a: the first pressure ring connecting part

42b: the second pressure ring connection part

42c: The third pressure ring connecting part

43: Pressure ring through hole

51: The first through member (T-bolt)

52: The second through member (with flange and cap nut)

53: Connecting part (cylindrical part)

53a: thread groove

53b: end

54: Opposite part (flange part)

55: Contact member (washer)

56: First Surface

56a: upper end

100: Junction pipe

X: Tube axis direction

B: Interval

C: central axis

D1, D2, D3: Long side direction

d1, d2, d3: center line

L: Centerline

P: reference plane

PI: inclined plane

Q: opposite side

W1: Maximum width (length) in the direction of the tube axis

W2: The length of the cylindrical part

θ: tilt angle

37B, 37D, 37E: first rib

N: horizontal plane

38D: Second rib

3': stop ring

32': snap ring connection

5': connection device

54': Flange

Fig. 1 is a front view of a pipe fixing device for a pipe joint according to a first embodiment of the present invention.

FIG. 2 is a side view of FIG. 1 .

Fig. 3 is a sectional view along line A-A of Fig. 1 .

Fig. 4A is a perspective view of the stop ring of the first embodiment.

FIG. 4B is a perspective view of a flanged cap nut according to the first embodiment.

FIG. 5A is a view corresponding to FIG. 1 , showing the state after tightening the connection means and before tightening the fastening means of the stop ring.

Figure 5B is a side view of Figure 5A.

Fig. 5C is a cross-sectional view along line B-B of Fig. 5A.

FIG. 6A is a view corresponding to FIG. 1 , showing the state after tightening the connection means and after tightening the fastening means of the stop ring.

Fig. 6B is a cross-sectional view along line C-C of Fig. 6A.

Fig. 7 is a view corresponding to Fig. 2, showing a state in which a pipe tension is applied to the joint pipe and the stop ring is inclined.

Fig. 8 is a front view of a pipe fixing device according to a second embodiment of the present invention.

FIG. 9 is a side view of FIG. 8 .

Fig. 10 is a perspective view of the stop ring of the second embodiment.

FIG. 11 is a diagram corresponding to FIG. 6A in the second embodiment.

FIG. 12 is a diagram corresponding to FIG. 7 in the second embodiment.

Fig. 13 is a front view of a pipe fixing device according to a third embodiment of the present invention.

FIG. 14 is a side view of FIG. 13 .

Fig. 15 is a perspective view of a stop ring according to a third embodiment.

FIG. 16 is a diagram corresponding to FIG. 6A in the third embodiment.

FIG. 17 is a diagram corresponding to FIG. 7 in the third embodiment.

Fig. 18 is a front view of a pipe fixing device according to a fourth embodiment of the present invention.

FIG. 19 is a side view of FIG. 18 .

Fig. 20 is a perspective view of a stop ring according to a fourth embodiment.

FIG. 21 is a diagram corresponding to FIG. 6A in the fourth embodiment.

FIG. 22 is a diagram corresponding to FIG. 7 in the fourth embodiment.

Fig. 23 is a front view of a pipe fixing device according to a fifth embodiment of the present invention.

FIG. 24 is a side view of FIG. 23 .

Fig. 25 is a perspective view of a stop ring according to a fifth embodiment.

FIG. 26 is a diagram corresponding to FIG. 6A in the fifth embodiment.

FIG. 27 is a diagram corresponding to FIG. 7 in the fifth embodiment.

Fig. 28 is a side view showing a conventional pipe fixing device.

3A: stop ring

56a: upper end

54: Opposite part (flange part)

5: Connection device

52: The second through member (with flange and cap nut)

56: First Surface

34a: second surface

7: Tilt mechanism

30A: ring body

PI: inclined plane

Q: opposite side

B: Interval

56: First Surface

34b: second surface

31: Protruding pieces

30x: Circumferential end

9a: Bolt

32a: First stop ring connecting part

32: Stop ring connection part

53: Connecting part (cylindrical part)

23: Flange

51: The first through member (T-bolt)

2: Connector body

42a: the first pressure ring connecting part

55: Contact member (washer)

40: Main body

4A: Press ring

42b: the second pressure ring connection part

55: Contact member (washer)

Claims (11)

A pipe fitting fixing device for a pipe joint, comprising: a stop ring, which reduces the diameter of a C-shaped ring body by a fastening device, and is fastened on the outer peripheral surface of a joint pipe; a pressure ring, which presses a gasket against On the socket part of the joint body; and the connection device, the stop ring and the pressure ring are connected and fixed to the joint body, wherein the stop ring has: a pair of protruding parts, arranged in the two circumferential directions of the ring body the end portion, and has a through hole through the fastening device; the tooth portion is arranged on the inner side of the ring body, and uses the fastening device to reduce the diameter to bite into the joint pipe; and a plurality of stop ring connecting parts, along the The ring body is arranged at appropriate intervals in the circumferential direction and has a stop ring penetration part that passes through the connecting device. The pressure ring has a plurality of pressure ring connection parts, and the multiple pressure ring connection parts have pressure ring through holes. The ring through hole faces the connecting parts of the plurality of stop rings in the direction of the tube axis, and passes through the connecting device. The connecting device has: a first through member, a through hole passing through the joint body and the pressure ring through hole; and the second penetration member, which has: a connecting portion that passes through the snap ring penetration portion and is connected to the first penetration member; and an opposing portion that faces the snap ring connection portion along the tube axis direction, The tightening device is provided with a tilting mechanism in which the diameter of the ring body is reduced, and the tilting mechanism is that when the stop ring connecting portion and the opposing portion contact each other, the stop ring is relative to the ring body. The reference plane perpendicular to the central axis is inclined along the pipe axis direction, so that the circumferential end of the ring body is close to the joint body, and the circumferential central part of the ring body is separated from the joint body. The first surface opposite to the stop ring connection part is parallel to the reference plane, and the second surfaces of the plurality of stop ring connection parts opposite to the opposite part are respectively located in the pipe axis direction relative to the reference plane For the same inclined surface, the distance between the first surface and the inclined surface increases from the end portion in the circumferential direction to the central portion in the circumferential direction. The pipe fitting fixing device of the pipe joint according to claim 1, wherein the plurality of stop ring connecting parts have: a pair of first stop ring connecting parts adjacent to the pair of protrusions; and a second stop ring the ring connecting portion is located at the central portion in the circumferential direction, The pair of first stop ring connecting parts are arranged in a line-symmetrical manner with respect to a center line connecting the central axis and the circumferential central part, The first stop ring penetration part of the first stop ring connection part is a long hole, and the long hole is that the connection part can slide along the circumferential direction of the ring body and the width is narrower than the opposite part, The second stop ring penetration part of the second stop ring connection part is a long hole, the long hole is that the connection part can slide along the direction of the center line and the width is narrower than the opposite part. The pipe fitting fixing device of the pipe joint according to claim 1, wherein the plurality of stop ring connecting parts have: a pair of first stop ring connecting parts adjacent to the pair of protrusions; and a second stop ring the ring connecting portion is located at the central portion in the circumferential direction, The pair of first stop ring connecting parts are arranged in a line-symmetrical manner with respect to a center line connecting the central axis and the circumferential central part, The first stop ring penetration part of the first stop ring connection part is a long hole, and the long hole is that the connection part can slide along the circumferential direction of the ring body and has a width narrower than the opposite part, The second stop ring penetration part of the second stop ring connection part is a long hole, and the long hole means that the connection part can slide along the direction of the centerline and has a narrower width than the opposite part. The pipe fitting fixing device of the pipe joint according to claim 1, wherein the plurality of stop ring connecting parts are stopped by a pair of stop rings located at the center part between the circumferential center part and the circumferential end part of the ring body composed of ring junctions, The pair of stop ring connecting parts are arranged in a line-symmetrical manner with respect to a center line connecting the central axis and the circumferential central part, The stop ring penetration part of the stop ring connection part is a long hole or a recess with an opening on one side, and the long hole or recess is that the connection part is slidable and narrower in width than the opposite part. The pipe fixing device for pipe joints according to claim 1, wherein the plurality of stop ring connecting parts are provided with: a pair of first stop ring connecting parts adjacent to the pair of protruding parts; a pair of second snap ring connecting portions adjacent to the central portion; a pair of third snap ring connecting portions located between the first snap ring connecting portion and the second snap ring connecting portion, The pair of first stop ring connection parts, the pair of second stop ring connection parts and the pair of third stop ring connection parts are line-symmetric with respect to the center line connecting the central axis and the circumferential central part mode configuration, The stop ring penetration part of each stop ring connection part is a long hole, and the long hole means that the connection part can slide along the circumferential direction of the ring body and has a narrower width than the opposite part. The pipe fitting fixing device of the pipe joint according to claim 3, wherein the plurality of stop ring connecting parts are further equipped with a pair of third stop ring connecting parts, which are located at the first stop ring connecting part and the second stop ring connecting part. Between the joints of the moving ring, The pair of third snap ring connecting portions are arranged in a line-symmetrical manner with respect to a center line connecting the central axis and the central portion in the circumferential direction, The third stop ring penetration part of the third stop ring connection part is a long hole, and the long hole means that the connection part can slide along the circumferential direction of the ring body and has a narrower width than the opposite part. The pipe fitting fixing device for pipe joints as claimed in any one of claims 2, 3, 5 or 6, wherein the joint pipe is a high-performance polyethylene pipe with a nominal diameter greater than or equal to 100. The pipe fixing device for pipe joints according to claim 4, wherein the joint pipe is a high-performance polyethylene pipe with a nominal diameter greater than or equal to 75. The pipe fitting fixing device for pipe joints according to any one of Claims 1 to 6, wherein the first through member is a T-shaped bolt, and the second through member is a flanged cap nut (cap nut). The pipe fitting fixing device of the pipe joint according to Claim 9, wherein the connecting device is further provided with a contact member, and the first penetrating member passes through and contacts the connecting portion and the pressure ring connecting portion. The pipe fixing device for pipe joints according to any one of Claims 1 to 6, wherein the inclined surface is a surface inclined within 5° and greater than 0° relative to the reference plane in the direction of the pipe axis.

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