JP2004316710A - Device for preventing rotation of pipe fitting part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and easily perform the work for fastening and fixing a first and a second fittings attached to both of connected pipes from both sides in the radial direction with a small deal of labor. <P>SOLUTION: Each of the first and the second fittings A and B possible to be fitted to both the pipes 1 and 2 from both sides in the radial direction are formed of arc-like large-diameter fitting bodies 11 and 15 to be fitted to a receiver pipe part 1, arc-like small-diameter fitting bodies 12 and 16 to be fitted to an insert pipe part 2 and connectors 13, 14, 17 and 18 integrally and continuously provided along ends of both the fitting bodies 11, 15 and 12, 16. One connector 13 of the first fitting A can be engaged with a back surface 17a side of one connector 17 of the second fitting B, and a latch body 19 is formed to relatively move both the fittings A and B to come close to each other toward a diameter reducing side around the engagement position thereof. Furthermore, single fastener C is provided to fasten the other connector 14 of the first fitting A and the other connector 18 of the second fitting B opposite to the described connector 14 for fixation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotation preventing device for preventing relative rotation between a receiving tube portion and an inserting tube portion inserted and connected to the receiving tube portion from the tube axis direction.
[0002]
[Prior art]
Generally, piping work is performed using a cheese-type joint or a bend-type joint at a bent path portion, a branch path portion, or a merging path portion of a pipe route. Are often assembled asymmetrically in the left-right direction with respect to a vertical line passing through.In this case, a rotational force is generated in the joint portion. When relative rotation occurs between the pipe portion and the relative rotation, the connection position of the other receiving pipe portion or the insertion pipe portion of the joint is largely shifted, and as a result, the other receiving pipe portion Alternatively, since a lot of labor and labor are required to correct the connection position of the insertion tube portion, the piping work efficiency is reduced.
[0003]
Therefore, as a method of preventing relative rotation between the connected receiving tube portion and the inserting tube portion, conventionally, as shown in FIGS. 6 and 7, the receiving tube portion 1 and the inserting tube portion 2 are There has been proposed a rotation preventing device including first and second mounting tools A and B which can be mounted from both sides in the radial direction.
[0004]
Each of the first and second mounting tools A and B of the rotation preventing device includes an arc-shaped large-diameter mounting body 50 that can be mounted to the receiving pipe section 1 from outside in the radial direction, and an insertion pipe section 2. On the other hand, an arc-shaped small-diameter mounting body 51 that can be mounted from the outside in the radial direction, and a connecting body 52 that is integrally connected over the ends of the mounting bodies 50 and 51 that face each other in the pipe axis X direction. The bolt insertion holes 50b, 51b are formed in both the circumferential end portions 50a of the large-diameter mounting body 50 and the circumferential end portions 51a of the small-diameter mounting body 51, respectively. -Four parts of the second mounting tools A and B were configured to be tightened and fixed with bolts 54 and nuts 55.
[0005]
[Problems to be solved by the invention]
In the conventional anti-rotation device, the first and second attachments A and B are applied to the connected receiving tube portion 1 and insertion tube portion 2 from both sides in the radial direction, and are opposed to each other in the radial direction. After inserting the bolts 54 into the insertion holes 50b at both ends 50a in the circumferential direction of both the large-diameter mounting bodies 50 and the insertion holes 51b at both ends 51a in the circumferential direction of both the small-diameter mounting bodies 51 opposed in the radial direction. Then, the nut 55 screwed to each bolt 54 is tightened to clamp and fix the receiving tube portion 1 with both large-diameter mounting members 50 and simultaneously clamp and fix the insertion tube portion 2 with both small-diameter mounting members 51. Thereby, the relative rotation between the receiving tube portion 1 and the insertion tube portion 2 caused by the assembling with an uneven weight balance in the left-right direction can be strongly prevented, but the first and second mountings are performed. In order to fasten and fix the four parts of tools A and B with bolts 54 and nuts 55, It takes a lot of time to work.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has a main problem in that first and second attachments applied to both connected pipe portions from both sides in a radial direction. It is an object of the present invention to provide a rotation preventing device capable of efficiently and easily performing a fastening operation with a small amount of labor.
[0007]
[Means for Solving the Problems]
The feature of the anti-rotation device according to claim 1 of the present invention is that the first anti-rotation device can be attached to the receiving tube portion and the insertion tube portion inserted and connected to the receiving tube portion from the tube axis direction from both sides in the radial direction. Each of the second attachments is an arc-shaped large-diameter attachment body that can be attached to the receiving tube portion from the radial outside, and an arc-shaped small-diameter attachment that can be attached to the insertion tube portion from the outside in the radial direction. And a connecting member integrally provided over the ends of the two mounting members opposed to each other in the axial direction of the tube axis. A hook that is engageable on the back side of one of the connecting members of the second mounting device facing the second mounting device and moves the two mounting devices relatively close to each other on the reduced diameter side with the engagement point as a fulcrum; A single fastener for tightening and fixing the other connecting member of the first mounting device and the other connecting member of the second mounting device opposed thereto. To the point it is there.
[0008]
According to the characteristic configuration, for example, the first mounting tool or the second mounting tool is applied to the connected receiving pipe section and the insertion pipe section from the upper side in the radial direction, and one of the first mounting tools is applied. On the back side of the hooking body formed on the connecting body or one of the connecting bodies of the second mounting tool, on the back side of the one connecting body of the second mounting tool or on the one connecting body of the first mounting tool. The body is engaged, and the two attachments are relatively moved toward the reduced diameter side using the engagement point as a fulcrum, that is, the second attachment is performed on the hook of the first attachment or on one of the connecting members of the second attachment. The second mounting tool or the first mounting tool is lifted and swung with the engagement point as a fulcrum in a state where a part of the load of the tool or the first mounting tool is supported, and the receiving pipe section and the insertion pipe section are rotated. The second mounting tool or the first mounting tool is applied from the lower side in the radial direction, and in this state, the other connecting body of the first mounting tool and the second mounting tool opposed thereto When the other connecting body is tightened with a single fastener, the two large-diameter mounted bodies and the two small-diameter mounted bodies are relatively reduced in diameter with the engagement point as a reaction point, and the two large-diameter mounted bodies receive the joint. At the same time as the mouth tube is clamped and fixed, the inlet tube is clamped and fixed with both small-diameter mounting bodies, and the inlet tube and the inlet tube due to uneven weight balance in the left and right direction are attached. Relative rotation can be strongly prevented.
[0009]
Therefore, when attaching both attachments from both sides in the radial direction to the connected two pipe sections, a part of the load of the second attachment or the first attachment is transferred to the hook of the first attachment or the first attachment. By being able to be supported by the other connecting member of the two mounting tools and by performing a tightening and fixing operation with a single fastener, the first and second mounting tools can be easily and efficiently tightened and fixed with little labor. It can be carried out.
[0010]
A feature of the rotation preventing device according to claim 2 of the present invention is that the fastener is a bolt and a nut, and the other connecting member of the first mounting device and the other connecting member of the second mounting device have bolt insertion holes. The distance from the fastening center line connecting the center of the hook to the center of the bolt insertion hole to the small-diameter mounting body is smaller than the distance from the fastening center line to the large-diameter mounting body. It is in the set point.
[0011]
According to the above-mentioned characteristic configuration, when the first and second mounting tools are tightened and fixed with a pair of bolts and nuts, the hooks are set based on the ratio of the outer diameter of the receiving pipe section to the outer diameter of the insertion pipe section. By setting the distance from the fastening center line connecting the center of the stop body and the center of the bolt insertion hole to the small-diameter mounting body smaller than the distance from the fastening center line to the large-diameter mounting body, the receiving pipe section The force of preventing the displacement of the large-diameter mounted body that clamps and fixes the opening and that of the small-diameter mounted body that clamps and fixes the insertion tube section are equalized, and the effect of preventing the rotation of both connected pipe sections can be enhanced. .
[0012]
The feature of the anti-rotation device according to claim 3 of the present invention is that each of the central portion in the circumferential direction of the large-diameter mounting body and the central portion in the circumferential direction of the small-diameter mounting body is configured to be thinner than both circumferential end portions continuous therewith. It is in the point.
[0013]
According to the above-described characteristic configuration, even when the outer diameter of the receiving tube portion and the outer diameter of the insertion tube portion vary, the circumference of the large-diameter mounting body is increased with the fastening operation with a single fastener. The central portion in the direction and the central portion in the circumferential direction of the small-diameter mounting body are easily bent and deformed along the outer peripheral surface of the receiving tube portion and the outer peripheral surface of the insertion tube portion, and the local portions in the circumferential direction of both the tube portions are formed. It is possible to suppress the concentration of stress caused by a proper tightening.
[0014]
The feature of the anti-rotation device according to claim 4 of the present invention is that each of the central part in the circumferential direction of the large-diameter mounting body and the central part in the circumferential direction of the small-diameter mounting body is configured to be wider than both circumferential end parts continuous therewith. It is in the point.
[0015]
According to the above-mentioned characteristic configuration, with the tightening and fixing operation by a single fastener, each of the circumferential central portion of the large-diameter mounting body and the circumferential central portion of the small-diameter mounting body is the outer peripheral surface of the receiving tube portion and When flexing and deforming along the outer peripheral surface of the insertion tube portion, the tightening force at that time can be dispersed in the tube axis direction in the portion configured to be wide, so that both the tube portions are locally localized in the circumferential direction. It is possible to suppress the concentration of stress caused by a proper tightening.
[0016]
The feature of the rotation preventing device according to claim 5 of the present invention resides in that the pipe contact surface of the large-diameter mounting body and the pipe contact surface of the small-diameter mounting body are along the pipe axis direction or along the fastening center line. The point is that a plurality of ridges intersecting with each other are formed.
[0017]
According to the above-mentioned characteristic configuration, with the tightening and fixing operation by a single fastener, each of the circumferential central portion of the large-diameter mounting body and the circumferential central portion of the small-diameter mounting body is the outer peripheral surface of the receiving tube portion and When pressed against the outer peripheral surface of the insertion tube portion, along the pipe axis direction formed on each of the pipe contact surface of the large-diameter mount and the pipe contact surface of the small-diameter mount, or with respect to the fastening center line. A plurality of intersecting ridges bite into the outer peripheral surface of the receiving tube portion and the outer peripheral surface of the insertion tube portion, and the effect of preventing rotation of both connected tube portions can be enhanced.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
FIG. 1 shows a pipe joint part used for a piping system of a fluid pipe such as a water pipe or a gas pipe, and another fitting pipe or another fitting pipe is formed in a receiving pipe part 1 formed on an end side of the fitting pipe or the fluid pipe. The insertion tube portion 2 formed on the end side of the fluid pipe is inserted and connected from the tube axis X direction, and between the reception tube portion 1 and the insertion tube portion 2, both pipe portions 1 and 2 are connected. When the relative disengagement movement is performed along the tube axis X direction, the disengagement prevention means 3 which abuts against each other from the tube axis X direction to prevent further disengagement movement, the receiving tube portion 1 and the insertion tube portion 2, Preventing means 4 for maintaining the shaft in a coaxial core state, and an annular synthetic rubber elastic seal capable of sealing between the outer peripheral surface 2a of the insertion tube portion 2 and the inner peripheral surface 1a of the receiving tube portion 1. Material 5 is provided.
[0019]
In addition, between the distal end of the insertion tube portion 2 and the inner annular step surface 1e of the inner peripheral surface 1a of the reception tube portion 1 facing the tube axis X in the direction of the tube axis X, the reception tube due to the water pressure in the tube is provided. A metal liner 8 for restricting the contraction operation of the insertion tube portion 2 and the insertion tube portion 2 is interposed, and a plurality of portions on the outer peripheral surface 2a of the insertion tube portion 2 and at equal intervals in the circumferential direction. (In this embodiment), a joining operation projection 9 for connecting and operating the insertion tube portion 2 to the reception tube portion 1 is integrally formed to protrude radially outward.
[0020]
As shown in FIG. 1, the detachment preventing means 3 is formed by inserting an annular first mounting groove 1b formed in the inner peripheral surface 1a of the receiving tube portion 1 into a substantially C-shape when viewed from the tube axis X direction. A metal-made locking member 6 formed in a U-shape and capable of being elastically deformed to the diameter-expanding side, and the locking member 6 is coaxially centered with the receiving tube portion 1 in a state where the diameter-expanding deformation is allowed. Along with the elastic holding ring 7 to be held, the two pipes 1 and 2 are relatively displaced from the tip of the outer peripheral surface 2a of the insertion pipe 2 by a certain amount or more due to an earthquake or uneven settlement. At this time, an annular stopper protrusion 2b is formed integrally with the locking member 6 to abut on the tube axis X in the direction of the tube axis to prevent the relative detachment movement of the two tube portions 1 and 2 further.
[0021]
As shown in FIGS. 1 to 3, the bending prevention means 4 is provided on the outer peripheral surface 2 a of the insertion tube portion 2, and on each of a portion continuous with the joining operation projection 9 and a circumferentially intermediate portion thereof. Each of the steadying portions is formed by integrally forming a thick-walled steadying portion 10 projecting in a band shape with an outer diameter slightly smaller than the inner diameter of the distal end side inner peripheral surface 1c of the receiving tube portion 1. A tapered surface 10a for joining guide is formed at the distal end portion of the receiving tube portion 10 while the end portion of the elastic sealing material 5 attached to the second mounting groove 1f of the inner peripheral surface 1a of the receiving tube portion 1 is compressed and deformed. Have been.
[0022]
As shown in FIGS. 1 to 5, the rotation preventing device mounted on the pipe joint configured as described above has a radial direction with respect to the connected receiving pipe 1 and insertion pipe 2. It consists of a pair of upper and lower mounting members A and B made of cast iron that can be mounted from both sides. One of the first mounting members A is an arc-shaped mounting member that can be mounted on the outer peripheral surface 1d of the receiving tube portion 1 from the radial outside. A large-diameter mounting body 11, an arc-shaped small-diameter mounting body 12 that can be mounted on the outer peripheral surface 2a of the insertion tube portion 2 from the radial outside, and both mounting bodies 11, which face each other in the tube axis X direction. 12 and a pair of left and right connecting members 13 and 14 integrally connected to each other over the end of the second mounting member B. The other second mounting member B is also similar to the first mounting member A described above. An arc-shaped large-diameter mounting body 15 that can be mounted to the outer peripheral surface 1d of the receiving tube portion 1 from the radial outside, and a diameter that is larger than the outer peripheral surface 2a of the insertion tube portion 2. A pair of left and right connecting members 17, which are integrally connected over the ends of the mounting members 15, 16, which are arc-shaped small-diameter mounting members 16, which can be mounted from the outside and the mounting members 15, 16 opposed to each other in the tube axis X direction. 18.
[0023]
The one connecting member 13 of the first mounting member A can be engaged with the back surface 17a of the one connecting member 17 through the space between the two mounting members 15 and 16 of the second mounting member B opposed thereto, and A prismatic latching body 19 for moving the two mounting tools A and B relatively closer to the reduced diameter side is formed integrally with the engaging point as a fulcrum, and the back face of one connecting member 17 of the second mounting tool B is formed. A recess 20 is formed in 17a for engaging and holding the hook 19 of the first attachment A in a state where the movement of the hook 19 in the tube axis X direction is restricted, and the other of the first attachment A is formed. A single fastener C is provided to fasten and secure the connecting body 14 and the other connecting body 18 of the second mounting tool B opposed thereto.
[0024]
The fastener C is inserted through an insertion hole 14a formed through the other connecting member 14 of the first mounting device A and an insertion hole 18a formed through the other connecting member 18 of the second mounting device B. And a nut 22 screwed into the T-shaped bolt 21.
[0025]
Based on the ratio of the outer diameter of the receiving tube portion 1 to the outer diameter of the insertion tube portion 2, the diameter is reduced from a fastening center line Y connecting the center of the hook 19 and the centers of the bolt insertion holes 14a and 18a. By setting the distance L1 to the mounting bodies 12 and 16 smaller than the distance L2 from the fastening center line Y to the large-diameter mounting bodies 11 and 15, both large-diameter mounting bodies for clamping and fixing the receiving tube 1 are provided. The configuration is such that the displacement prevention force of the small-diameter mounting members 12 and 16 for holding and fixing the insertion tube portion 2 is equalized.
[0026]
The circumferential central portions 11a and 15a of the large-diameter mounts 11 and 15 are thinner and wider than the circumferential end portions 11b and 15b that are continuous with the large-diameter mounts 11, 15a. Similarly, the portions 12a and 16a are thinner and wider than the circumferential end portions 12b and 16b that are continuous with the portions 12a and 16a. Further, the pipe contact surfaces of the circumferential central portions 11a and 15a of the large-diameter mounting bodies 11 and 15 and A plurality of ridges 23 are integrally formed on each of the pipe contact surfaces of the central portions 12a and 16a in the circumferential direction of the small-diameter mounts 12 and 16 so as to integrally protrude along the pipe axis X direction.
[0027]
When the rotation of the connected receiving tube portion 1 and the insertion tube portion 2 is to be stopped, the first mounting device A or the radially upper side with respect to the receiving tube portion 1 and the insertion tube portion 2. The second mounting tool B is applied to a hook 19 formed on one connecting member 13 of the first mounting tool A or a concave portion 20 formed on a back surface 17a of one connecting body 17 of the second mounting tool B. The concave portion 20 formed on the back surface 17a of the one connecting member 17 of the second mounting device B or the engaging member 19 formed on the one connecting member 13 of the first mounting device A enters and engages. The two mounting tools A and B are relatively moved closer to the reduced diameter side with the fulcrum as a fulcrum, that is, the second mounting tool B or the first mounting tool is mounted on the hook 19 of the first mounting tool A or the recess 20 of the second mounting tool B. Lifting and swinging the second mounting tool B or the first mounting tool A with the engagement point as a fulcrum while supporting a part of the load of the tool A, The second attachment B or the first attachment A is applied to the mouth tube portion 1 and the insertion tube portion 2 from the lower side in the radial direction, and in this state, the other connecting member 14 of the first attachment A is When the other connecting member 18 of the second mounting member B opposed thereto is tightened with a pair of T-bolts 21 and nuts 22, the two large-diameter mounting members 11, 15 and both The small-diameter mounting bodies 12 and 16 are relatively reduced in diameter, and the outer peripheral surface 1d of the receiving tube portion 1 is clamped and fixed by the two large-diameter mounting bodies 11 and 15, and at the same time, the insertion pipe is fixed by the small-diameter mounting bodies 12 and 16. The outer peripheral surface 2a of the portion 2 is clamped and fixed, so that the relative rotation between the receiving tube portion 1 and the insertion tube portion 2 caused by the assembly with uneven weight balance in the left-right direction can be strongly prevented. .
[0028]
Therefore, when attaching both attachments A, B to both connected pipe parts 1, 2 from both sides in the radial direction, a part of the load of the second attachment B or the first attachment A is reduced to the second. It can be supported by the hook 19 of the mounting device A or the concave portion 20 of the second mounting device B, and can be tightened and fixed by a set of T-bolts 21 and nuts 22 constituting a single fastener C. By doing so, the work of tightening and fixing the first and second mounting tools A and B can be performed efficiently and easily with little labor.
[0029]
[Other embodiments]
(1) In the above-described embodiment, one single fastener C for tightening and fixing the other connecting member 14 of the first mounting device A and the other connecting member 18 of the second mounting device B opposed thereto is one. Although the T-bolt 21 and the nut 22 of the set have been described as an example, the present invention may be implemented using a cam or the like instead.
[0030]
(2) In the above embodiment, the embodiment in which the anti-rotation device is mounted on the pipe joint portion provided with the detachment prevention means 3 and the bending prevention means 4 has been described, but the pipe joint to which the rotation prevention device of the present invention is mounted. As a part, it can be applied to any pipe joint part provided with the receiving pipe part 1 and the insertion pipe part 2.
[0031]
(3) In the above-described embodiment, the pipe contact surfaces of the circumferential central portions 11a and 15a of the large-diameter mounts 11 and 15 and the pipe contact surfaces of the circumferential central portions 12a and 16a of the small-diameter mounts 12 and 16 are arranged. Each of the plurality of ridges 23 is integrally formed so as to protrude along the pipe axis X direction. However, the ridges 23 may be integrally formed so as to intersect with the fastening center line Y. .
[0032]
(4) In the above-described embodiment, the pipe contact surfaces of the circumferential central portions 11a and 15a of the large-diameter mounts 11 and 15 and the pipe contact surfaces of the circumferential central portions 12a and 16a of the small-diameter mounts 12 and 16 are arranged. A plurality of ridges 23 are formed integrally with each other along the pipe axis X direction. Instead of providing such ridges 23, a high friction member having a high friction coefficient such as urethane rubber is brought into contact with the pipe. It may be carried out by sticking to a surface.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view of a pipe joint and a rotation preventing device according to a first embodiment of the present invention. FIG. 2 is a perspective view of the pipe joint and a rotation preventing device. FIG. FIG. 4 is an exploded perspective view of a rotation prevention device. FIG. 4 is a front view of a rotation prevention device. FIG. 5 is a plan view of a pipe joint and a rotation prevention device. FIG. 6 is a front view of a conventional rotation prevention device attached to a pipe joint. FIG. 7 is a bottom view of a conventional anti-rotation device mounted on a pipe joint.
A first mounting body B second mounting body C Fastener L1 Distance L2 Distance X Pipe axis Y Fastening center line 1 Inlet pipe section 2 Insertion pipe section 11 Large diameter mounting body 11a Circumferential center portion 11b Circumferential both ends 12 Small-diameter mounting body 12a Circumferential center portion 12b Circumferential both ends 13 Connecting body 14 Connecting body 14a Bolt insertion hole 15 Large-diameter mounting body 15a Circumferential center part 15b Circular both ends 16 Small-diameter mounting body 16a Circumferential center part 16b Both ends 17 in the circumferential direction Connecting member 17a Back surface 18 Connecting member 18a Bolt insertion hole 19 Hook 21 Bolt (T-bolt)
22 nut 23 ridge

Claims (5)

Each of the first and second fittings that can be attached from both sides in the radial direction to the receiving tube portion and the inserting tube portion inserted and connected to the receiving tube portion from the tube axis direction, An arc-shaped large-diameter mounting body that can be mounted from the outside in the radial direction, an arc-shaped small-diameter mounting body that can be mounted to the insertion tube part from the outside in the radial direction, and both mounting bodies that face each other in the tube axis direction. And a connecting member integrally connected to the end portion, and one of the connecting members of the first mounting device has a back side of one of the connecting members of the second mounting device opposed thereto. And a hook that moves the two mounting tools relatively close to each other on the reduced diameter side with the engagement point as a fulcrum, and further faces the other connecting member of the first mounting tool. An apparatus for preventing rotation of a pipe joint portion provided with a single fastener for tightening and fixing the second attachment to the other connecting member. The fastener is a bolt and a nut, and the other connecting member of the first mounting device and the other connecting member of the second mounting device have a through hole for a bolt formed therethrough. The rotation of the pipe joint according to claim 1, wherein a distance from the fastening center line connecting the center of the insertion hole to the small-diameter mounting body is set smaller than a distance from the fastening center line to the large-diameter mounting body. apparatus. The pipe joint part according to claim 1 or 2, wherein each of a central portion in the circumferential direction of the large-diameter mounting member and a central portion in the circumferential direction of the small-diameter mounting member is formed to be thinner than both end portions in the circumferential direction continuous with the central portion. Anti-rotation device. The rotation preventing device for a pipe joint according to claim 3, wherein each of a central portion in the circumferential direction of the large-diameter mounting member and a central portion in the circumferential direction of the small-diameter mounting member are configured to be wider than both circumferential end portions continuous therewith. A plurality of ridges are formed on each of the pipe contact surface of the large-diameter mounting body and the pipe contact surface of the small-diameter mounting body along the pipe axis direction or intersecting with the fastening center line. The rotation preventing device for a pipe joint according to any one of claims 1 to 4.

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