JP2009150449A - Pipe fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe fitting restricted in deterioration of durability even in the structure connecting pipes while absorbing inclination of a counter side pipe fitting. <P>SOLUTION: Even in the case wherein a counter side pipe fitting 20 is inserted, being inclined against the shaft center of a pipe fitting body 11, the pipe fitting body 11 is coupled, being inclined so as to follow the inclination of the counter side pipe fitting 20, by swinging the pipe fitting body 11 or moving it in the radial direction. With this structure, since it is unnecessary to increase a load for correcting inclination of the counter side pipe fitting 20, durability to abrasion and deformation of a guide pin 22 of the counter side pipe fitting 20 is improved. Since swing of the pipe fitting body 11 itself and movement thereof in the radial direction are absorbed by deflection of a flexible pipe 11b, fluid flow structure inside the pipe fitting body 11 is not influenced by operation of the pipe fitting body 11, and durability to leakage of a flow due to deterioration of sealability and early breakdown is improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pipe joint that is used, for example, for pipe connection of various facilities and the like and enables pipe connection while absorbing the inclination of the counterpart pipe joint.

  Conventionally, as this type of pipe joint, a pipe joint main body having a mating pipe joint detachably connected to one axial end side is provided, and the other axial end side of the pipe joint main body is swingably supported by a housing. Thus, even when the mating pipe joint is inclined at the time of connection, it is known that the connection can be made while absorbing the inclination by swinging the pipe joint body (see, for example, Patent Document 1). .) In this pipe joint, the other end of the pipe joint body and the spherical part provided on the housing are slidably brought into contact with each other, and each spherical part is slid within the communication range of the flow port provided on each spherical part. Thus, the fluid is allowed to flow through the flow port while allowing the pipe joint body to swing.

As other pipe joints, as shown in FIGS. 8 to 10, a movable block 2 that supports the pipe joint main body 1 so as to be movable in the radial direction and an insertion port member 3 attached to the movable block 2 are provided. The one end side of the insertion port 3a of the insertion port member 3 is formed so as to expand outwardly in a tapered shape, and the mating pipe joint 5 incorporated in the guide pin 4 is used as the insertion port 3a of the insertion port member 3. There is also one in which the pipe joint body 1 and the mating pipe joint 5 in the insertion port 3a are connected by insertion. In this pipe joint, the guide pin 4 is swingably supported by the spherical bush 6, and even when the mating pipe joint 5 is inclined with respect to the axial direction of the pipe joint body 1 as shown in FIG. 9, the mating pipe joint 5 is guided by the inner surface of the tapered insertion port 3a, and the movable block 2 moves in the radial direction of the pipe fitting body 1 so that the mating pipe joint 5 is inclined. It correct | amends and it connects so that the axial center of the other party pipe joint 5 and the axial center of the pipe joint main body 1 may correspond, as shown in FIG.
Japanese Utility Model Publication No. 7-38882

  However, in the former pipe joint structure, each spherical surface portion that absorbs the inclination of the pipe joint body is in contact with the fluid, and each spherical surface portion slides while receiving the coupling thrust, so that the sealing performance of the sliding portion is improved. There is a problem that it tends to be lowered and inferior in durability against fluid leakage and early breakage.

  In the latter pipe joint structure, the load for correcting the inclination of the mating pipe joint 5 increases as the inclination angle to be absorbed increases, so that an excessive coupling force may be required. 3 and the guide pin 4 have a problem of poor durability against wear and deformation.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a pipe joint that does not reduce durability even in a structure in which connection is made while absorbing the inclination of the counterpart pipe joint. There is to do.

  In order to achieve the above object, the present invention provides a pipe joint that can be connected to a mating pipe joint while absorbing the inclination of the mating pipe joint. A pipe joint body to which a flexible pipe is connected to the other end in the axial direction, a housing fixed to an arbitrary object to be mounted and housing the pipe joint body inside, and the pipe joint body swinging with respect to the housing A first support portion that freely supports and a second support portion that supports the first support portion movably in the radial direction of the pipe joint body with respect to the housing.

  As a result, even when the mating pipe joint is inserted in an inclined state with respect to the axis of the pipe joint main body, the pipe joint body is tilted by the rocking and radial movement of the pipe fitting main body. It becomes possible to combine the members while being inclined so as to follow the above. At that time, the swing and radial movement of the pipe joint body itself are absorbed by the bending of the flexible pipe.

  According to the present invention, even when the mating pipe joint is inserted in an inclined state with respect to the axis of the pipe joint body, the pipe joint body is coupled while being tilted so as to follow the tilt of the mating pipe joint. Therefore, it is possible to improve durability against wear and deformation of the mating pipe joint without increasing the load for correcting the inclination of the mating pipe joint. In this case, the oscillation and radial movement of the pipe joint body itself are absorbed by the bending of the flexible pipe, so that the fluid flow structure in the pipe joint body is not affected by the operation of the pipe joint body, and the seal It is possible to improve the durability against fluid leakage and early breakage due to a decrease in performance.

  1 to 7 show an embodiment of the present invention. FIG. 1 is a side sectional view of a pipe joint. FIG. 2 is a partial sectional side view of a mating pipe joint. FIG. 4 and 7 are partially sectional side views showing the coupling operation of the pipe joint.

  The pipe joint 10 of this embodiment includes a pipe joint main body 11 to which a mating pipe joint 20 is detachably connected, a housing 12 that houses the pipe joint main body 11 therein, and the pipe joint main body 11 with respect to the housing 12. A first support portion 13 that is supported so as to be swingable, a second support portion 14 that supports the first support portion 13 movably in the radial direction of the pipe joint body 11 with respect to the housing 12, and a pipe joint body. 11 is guided to return to a predetermined direction in the swing direction, the guide member 15 that guides the first support portion 13 to return to a predetermined position in the moving direction, and an insertion port into which the mating pipe joint 20 is inserted. Member 16.

  The pipe joint body 11 has a male coupling part 11a coupled to the mating pipe joint 20 on one end side in the axial direction, and a flexible pipe communicating with an external pipe or device (not shown) on the other end side in the axial direction. 11b is connected. The pipe joint body 11 is provided with a valve body 11c that opens and closes an internal flow path, and the valve body 11c is pressed against the valve seat 11e by a spring 11d. The distal end portion of the valve body 11c protrudes outside the coupling portion 11a. By pressing the distal end portion of the valve body 11c, the valve body 11c moves backward from the valve seat 11e so that the flow path is opened. Yes. Further, the spring 11d is locked to the retaining ring 11g via a locking member 11f in the pipe joint body 11, and a fluid flow hole 11h is provided in the locking member 11f.

  The housing 12 is formed of a cylindrical member that is open at both ends in the axial direction, and one end in the axial direction is fixed to an external attachment object 30. A second support portion 14 is provided in the housing 12 so as to be movable in the axial direction, and a stopper 12 a for restricting the movement of the second support portion 14 is provided on the inner peripheral surface of the housing 12.

  The first support portion 13 is formed of a cylindrical member into which the pipe joint main body 11 is inserted, and a convex spherical surface member 13a provided at a predetermined axial position of the pipe joint main body 11 is a concave spherical receiving member. 13b is slidably supported. That is, the pipe joint body 11 is supported by the first support portion 13 so as to be swingable around the spherical member 13a. A flange 13 c is provided on one axial end side of the first support portion 13, and the flange 13 c is slidably locked to one axial end surface of the second support portion 14. Further, a rubber cover 13d is provided between the base end side of the coupling portion 11a of the pipe joint main body 11 and the flange 13c, and the gap between the pipe joint main body 11 and the first support portion 13 is covered by the cover 13d. It has been broken.

  The second support portion 14 is formed of an annular member provided on the inner peripheral surface of the housing 12 so as to be slidable in the axial direction, and the first support portion 13 can be moved in the radial direction in the central opening portion 14a. It is inserted. The second support portion 14 is urged toward one end in the axial direction of the housing 12 by a coiled spring 14b as urging means, and movement is restricted at a predetermined position in the axial direction by a stopper 12a of the housing 12. It has become. Further, a contact portion 14c is provided on the inner peripheral edge of the second support portion 14 so that the guide member 15 contacts the one end side in the axial direction of the housing 12, and the contact portion 14c faces the center of the opening portion 14a. It is formed in a tapered shape.

  The guide member 15 is composed of an annular member provided on the outer peripheral surface of the first support portion 13 so as to be slidable in the axial direction, and its outer peripheral edge is in contact with the contact portion 14 c of the second support portion 14. It is formed in a taper shape. The guide member 15 is urged toward one end in the axial direction of the housing 12 by a coiled spring 15a as urging means, and the spring 15a is a flange-like locking member 15b fixed to the outer peripheral surface of the pipe joint body 11. It is locked to.

  The insertion port member 16 has an insertion port 16 a into which the mating pipe joint 20 is inserted, and is provided on one end side in the axial direction of the housing 12. One end side of the insertion port 16a is formed to expand outwardly in a tapered shape, and the other end side of the insertion port 16a is formed to have the same inner diameter and extend in the axial direction. In this case, the inner diameter dimension D1 on the other end side of the insertion port 16a is such that the pipe joint body 11 and the mating pipe joint 20 can be coupled within the swing and movement range of the pipe joint body 11.

  The mating pipe joint 20 includes a pipe joint body 21 to which the pipe joint 10 is detachably connected, and a guide pin 22 in which the pipe joint body 21 is built.

  The pipe joint body 21 has a female coupling part 21a connected to the pipe joint 10 on one end side in the axial direction, and a pipe connection part 21b connected to a pipe (not shown) is provided on the other end side in the axial direction. ing. The pipe joint body 21 is provided with a valve body 21c that opens and closes an internal flow path, and the valve body 21c is pressed against the valve seat 21e by a spring 21d. The distal end portion of the valve body 21c protrudes to the outside of the coupling portion 21a. By pressing the distal end portion of the valve body 21c, the valve body 21c moves backward from the valve seat 21e and the flow path is opened. Yes. The spring 21d is locked to a retaining ring 21g via a locking member 21f in the pipe joint body 21, and a fluid flow hole 21h is provided in the locking member 21f. The coupling portion 21a has an inner diameter substantially equal to that of the coupling portion 11a of the pipe joint 10, and a seal member 21h made of an annular rubber is provided on the inner peripheral surface thereof.

  The guide pin 22 is formed of a cylindrical member having a semi-spindle shape at the tip, and a pipe connection portion 21b of the pipe joint main body 21 protrudes from the base end side thereof. A flange-shaped attachment portion 22 a is provided on the proximal end side of the guide pin 22, and the attachment portion 22 a is fixed to another external attachment object 40. Further, the outer diameter D2 of the guide pin 22 is smaller than the inner diameter D1 of the insertion port member 16, and the fitting body 11 and the mating fitting 20 can be coupled within the swing and movement range of the fitting body 11. It is a big size.

  In the pipe joint 10 and the counterpart pipe joint 20, when the pipe joint bodies 11 and 21 are coupled as shown in FIG. 3A, the valve bodies 11c and 21c are connected as shown in FIG. 3B. The tip portions are brought into contact with each other and retracted from the valve seats 11e and 21e, respectively, so that the flow paths in the pipe joint main bodies 11 and 21 communicate with each other.

  In the pipe joint 10 and the counterpart pipe joint 20 configured as described above, the pipe joint bodies 11 and 21 are coupled to each other by inserting the guide pin 22 of the counterpart pipe joint 20 into the insertion port 16a of the pipe joint 10. And it connects so that the flow path in each pipe joint main body 11 and 21 may communicate. At that time, as shown in FIG. 4, when the mating pipe joint 20 is inserted in an inclined state with respect to the axis of the pipe joint 10, the pipe joint main bodies 11, 21 are kept in a state where the mating pipe joint 20 is tilted. As shown in FIG. 5, the coupling portion 11 a of the pipe joint 10 abuts on the edge of the coupling portion 21 a of the mating pipe joint 20. At this time, the joint body 11 swings with respect to the first support portion 13 by the contact of the coupling portions 11a and 21a, and moves together with the first support portion 13 in the radial direction. The operation is allowed by the bending of the flexible tube 11b. In the course of such an operation, the pipe joint body 11 is inclined so as to follow the inclination of the mating pipe joint 20, and as a result, the orientation of the axis of the pipe joint body 11 of the pipe joint 10 is as shown in FIG. Matching with the direction of the axis of the pipe joint main body 21 of the mating pipe joint 20, each pipe joint main body 11, 21 is coupled with its axis inclined. Thereafter, by further pressing the mating pipe joint 20 toward the pipe joint 10, the second support portion 14 moves to the other end side in the axial direction of the housing 12 against the spring 14b as shown in FIG. The coupled state of the pipe joint bodies 11 and 21 is maintained by the biasing force of the spring 14b.

  Further, in a state where the coupling of the pipe joint 10 and the counterpart pipe joint 20 is released, the guide member 15 that abuts against the tapered abutting portion 14a of the second support portion 14 by the urging force of the spring 14b guides the first. The one support portion 13 returns to the radial center of the housing 12 and returns to the same direction as the axis of the housing 12, so that the pipe joint body 11 is held in a state of being aligned with the housing 12.

  Thus, according to the pipe joint 10 of the present embodiment, the pipe joint main body 11 connected to the flexible pipe 11b is supported by the first support portion 13 so as to be swingable around a predetermined position in the axial direction, Since the second support portion 14 is supported so as to be movable in the radial direction, even when the mating pipe joint 20 is inserted in an inclined state with respect to the axis of the pipe joint body 11, the pipe joint body 11. By oscillating and moving in the radial direction, the pipe joint body 11 can be coupled while being inclined so as to follow the inclination of the mating pipe joint 20. Thereby, since the load which corrects the inclination of the other party pipe joint 20 is not increased, durability with respect to wear and a deformation | transformation of the guide pin 22 of the other party pipe joint 20 can be improved. In addition, the swinging and radial movement of the pipe joint main body 11 itself is absorbed by the bending of the flexible pipe 11b, so that the fluid flow structure in the pipe joint main body 11 may be affected by the operation of the pipe joint main body 11. In addition, durability against fluid leakage and early breakage due to a decrease in sealing performance can be improved.

  Further, since the pipe joint body 11 is urged so as to return to a predetermined direction in the swinging direction and the first support portion 13 is urged so as to return to a predetermined position in the moving direction, the spring 15a is provided. In a state where the coupling between the joint 10 and the mating pipe joint 20 is released, the pipe joint body 11 can be held in a state of being aligned with the housing 12, and the mating of the mating pipe joint 20 is always smooth. It can be carried out.

  Further, by abutting against the tapered abutting portion 14a of the second support portion 14 by the spring 15a, the pipe joint main body 11 is guided so as to return to a predetermined direction in the swinging direction, and the first support portion 13 is guided. Since the guide member 15 which guides so that it may return to the predetermined position of a moving direction is provided, the alignment function of the pipe joint main body 11 can be improved more by the guide member 15. FIG.

  Further, the second support portion 14 is provided so as to be movable in the axial direction of the pipe joint body 11 with respect to the housing 12, and the second support portion 14 is urged toward one end in the axial direction of the pipe joint body 11 by a spring 14b. Thus, the coupling state of the pipe joint bodies 11 and 21 can be reliably held by the biasing force of the spring 14b, and the connection reliability can be improved. In this case, since the pipe joint body 11 can be moved in the axial direction by the second support portion 14 even when the pipe joint bodies 11 and 21 are coupled, the pipe joint body 11 follows the inclination of the mating pipe joint 20. There is also an advantage that it can be made easy.

  Further, the insertion port member 16 into which the mating pipe joint 20 is inserted is provided, and one end side of the insertion port 16a of the insertion port member 16 is formed so as to expand outwardly in a tapered shape. Since the other end side is formed to have an inner diameter that allows the fitting body 11 and the mating pipe joint 20 to be coupled within the range of rocking and radial movement of the fitting body 11, the mating pipe joint 20 is formed by the insertion port 16a. The guide can be guided to a position where it can be coupled to the pipe joint body 11. As a result, even when the displacement with the mating pipe joint 20 is large, the connection can be easily made, and the pipe joint body 11 and the mating pipe joint 20 are connected with an inclination, so that the inner diameter dimension of the insertion port 16a is obtained. The difference between D1 and the outer diameter D2 of the guide pin 22 can be increased, and the guide pin 22 can be inserted more smoothly. In this case, as in the movable block shown in the conventional example, if the housing 12 is supported so as to be movable in the radial direction with respect to the attachment object 30, the positional deviation from the mating pipe joint 20 can be prevented. Can be absorbed by movement.

Side surface sectional drawing of the pipe joint which shows one Embodiment of this invention Partial cross-sectional side view of mating pipe fitting Side sectional view of the main part of the pipe joint Partial cross-sectional side view showing coupling operation of pipe joint Partial cross-sectional side view showing coupling operation of pipe joint Partial cross-sectional side view showing coupling operation of pipe joint Partial cross-sectional side view showing coupling operation of pipe joint Partial sectional side view showing the coupling operation of a conventional pipe joint Partial sectional side view showing the coupling operation of a conventional pipe joint Partial sectional side view showing the coupling operation of a conventional pipe joint

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Pipe joint, 11 ... Pipe joint main body, 12 ... Housing, 13 ... 1st support part, 14 ... 2nd support part, 14a ... Contact part, 14b ... Spring, 15 ... Guide member, 15a ... Spring, 16 ... Insert port member, 16a ... Insert port, 20 ... Mating pipe joint, 30 ... Installation object.

Claims (5)

In a pipe joint that can be connected to the mating pipe joint while absorbing the inclination of the mating pipe joint,
A pipe fitting body in which a mating pipe joint is detachably connected to one axial end, and a flexible pipe is connected to the other axial end;
A housing that is fixed to an arbitrary object to be mounted and accommodates a pipe fitting body inside;
A first support part for swingably supporting the pipe joint body with respect to the housing;
A pipe joint comprising: a second support part that supports the first support part so as to be movable in a radial direction of the pipe joint body with respect to the housing. An urging means for urging the pipe joint body to return to a predetermined direction in the swing direction and urging the first support portion to return to a predetermined position in the moving direction is provided. Item 1. A pipe joint according to Item 1. By urging by the urging means and abutting a tapered abutting portion provided in the second support portion, the pipe joint body is guided to return to a predetermined direction in the swinging direction, and the first The pipe joint according to claim 2, further comprising a guide member for guiding the support portion so as to return to a predetermined position in the moving direction. Providing the second support portion movably in the axial direction of the pipe joint body with respect to the housing;
The pipe joint according to claim 1, 2, or 3, further comprising an urging means for urging the second support portion toward one axial end side of the pipe joint main body. It has an insertion port into which the mating pipe joint is inserted, and is formed so that one end side of the insertion port expands in a tapered shape toward the outside, and the other end side of the insertion port is swung on the pipe fitting body. The pipe joint according to claim 1, 2, 3, or 4, wherein the pipe joint body and the mating pipe joint are formed to have an inner diameter that can be coupled within a radial movement range.

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