JP5713259B2 - Water stop structure of pipe joint - Google Patents

Description

  The present invention relates to a water-stopping structure of a pipe joint that connects steel pipes that are used mainly for pipe roof construction pipes, piles, water pipes, and the like.

  Conventionally, in this type of pipe joint, an inner joint member supported at the end of the other steel pipe is inserted into an outer joint member supported at one end of the steel pipes connected to each other, and both joint members are connected. There is known a structure in which the ends of steel pipes are connected by fixing members such as fixing pins (for example, Patent Document 1).

  In such a pipe joint, for example, as shown in FIG. 12, an inner joint member 102 inserted into the outer joint member 100 with a ring-shaped water stop material 101 fixed to the inner surface of the outer joint member 100. The water-stopping member 101 is brought into contact with the water-stopping material 101 to stop water between the inner and outer joint members. In addition, the code | symbol 103 in a figure is a groove | channel for water stop material fixing (patent document 2).

JP 2005-48583 A Japanese Utility Model Publication No.59-152289

  However, in the conventional technique as described above, it is necessary to form the groove 103 for fixing the water stop material 101 on the inner peripheral surface of the outer joint member in order to resist water pressure and pressing by the inner joint member. However, there is a problem that the cost increases.

  Moreover, since the conventional pipe joint described above has a structure in which the water stop material 101 is attached between the outer joint member 100 and the inner joint member 102, the water stop material 101 bites when the joint members 100 and 102 are fitted together. In some cases, the water-stopping material 101 is displaced at the time of fitting both joint members, and there is a possibility that the water-stopping function is not sufficiently exhibited. Furthermore, when a high water pressure is applied to the water stop material 101 from the outside of the steel pipe, the water stop material may be peeled off from the outer joint member or may be deformed unexpectedly, thereby hindering the water stop effect. There was a problem that there was.

  In view of such a conventional problem, the present invention has been made for the purpose of providing a water stop structure for a pipe joint that suppresses unintended deformation of a water stop material and provides a stable water stop effect.

In order to solve the conventional problems as described above and achieve the intended object, the feature of the invention according to claim 1 is that an outer joint member supported by one end of the tubular body is provided with an end of the other tubular body. The inner joint member supported by the portion is inserted, and the tip of the inner joint member is brought into contact with the water-stopping material fixed to the inner peripheral surface of the outer joint member to stop water between the inner and outer joint members. In the water-stopping structure for a pipe joint, the water-stop auxiliary member has an annular water-stopping material receiving portion that is supported on the inner peripheral portion of the outer joint member and raised to the inner surface side. The water stop material is disposed on the front side of the inner joint member of the water stop material receiving portion in the insertion direction, and the water stop material is stopped at the tip of the inner joint member when the two joint members are fitted together. This is because it is pressed against the water receiving member side.

  According to a second aspect of the present invention, in addition to the configuration according to the first aspect, the water stop assisting member is arranged to be bent toward the inner joint member side from the inner edge portion of the water stop material receiving portion. There exists a shape-shaped deformation | transformation suppression part, and this deformation | transformation suppression part has been made to arrange | position inside the said water stop material.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the water stop auxiliary member is arranged to be bent from the outer edge portion of the water stop material receiving portion toward the connection direction counterpart tube. It has a cylindrical outer tube portion, and the water blocking material is fixed to the inner peripheral surface of the outer tube portion.

  According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, the water blocking material receiving portion is formed such that a circular cross section continuously forms a ring in the circumferential direction.

In the water stop structure for a pipe joint according to the present invention, as described above, the inner joint member supported by the other pipe end is inserted into the outer joint member supported by the one pipe end, In the water-stopping structure for a pipe joint, the tip of the inner joint member is brought into contact with a water-stopping material fixed to the inner peripheral surface of the outer joint member to stop water between the inner and outer joint members. The outer joint member includes a water stop auxiliary member having an annular water stop material receiving portion that is supported by the inner peripheral portion of the outer joint member and is raised to the inner surface side, and the water stop material is received by the water stop material receiver. By placing the inner joint member on the front side in the insertion direction of the part, and when the two joint members are fitted, the water stop material is pressed against the water stop receiving member side at the tip of the inner joint member. Suppresses the movement of the water stop material due to the pressure of the water pressure and the inner joint member, and the inner joint member and the water stop material Stable preferred water stop effect by maintaining contact state is obtained. Moreover, the groove | channel for fixing a water stop material becomes unnecessary, and the processing cost becomes unnecessary.

  Further, in the present invention, the water stop assisting member has a cylindrical deformation suppressing portion that is arranged to be bent toward the inner joint member side from the inner edge portion of the water blocking material receiving portion, and the deformation suppressing portion is By arrange | positioning inside the said water stop material, the movement and deformation | transformation which the water stop material do not intend can be suppressed suitably.

It is a side view which shows the 1st Example of the pipe joint using the water stop structure of the pipe joint which concerns on this invention. It is a longitudinal cross-sectional view same as the above. It is a cross-sectional view same as the above. It is a partial expanded sectional view which shows the water stop structure part of the outer joint member in FIG. It is a partial expanded sectional view which shows the state which made the inner joint member fit in the outer joint member same as the above. It is a partial expanded sectional view which shows the water stop structure part of the outer joint member of the 2nd Example of the pipe joint which concerns on this invention. It is a partial expanded sectional view which shows the state which made the inner joint member fit in the outer joint member same as the above. It is a partial expanded sectional view which shows the water stop structure part of the outer joint member of the 3rd Example of the pipe joint which concerns on this invention. It is a partial expanded sectional view which shows the state which made the inner joint member fit in the outer joint member same as the above. It is a partial expanded sectional view which shows the water stop structure part of the outer joint member of 4th Example of the pipe joint which concerns on this invention. It is a partial expanded sectional view which shows the state which made the inner joint member fit in the outer joint member same as the above. It is a partial expanded sectional view which shows an example of the water stop structure part of the conventional pipe joint.

  Next, an embodiment of a water stop structure for a pipe joint according to the present invention will be described based on an embodiment shown in the drawings. In addition, the code | symbol 1 in a figure is a steel pipe.

  Each steel pipe 1, 1 is formed in a cylindrical shape, and the ends of the continuous steel pipes 1, 1 facing each other are connected by a pipe joint 2.

  As shown in FIGS. 2 and 3, the pipe joint 2 includes an outer joint member 3 supported at the end of one steel pipe 1 and an inner joint member 4 supported at the end of the other steel pipe. Both the steel pipes 1 and 1 are connected by inserting the inner joint member 4 into the outer joint member 3 and fixing the outer and inner joint members 3 and 4 with the fixing members 5, 5. Yes.

  Through-holes 6 and 7 are formed in the outer and inner both-side joint members 3 and 4 at intervals in the circumferential direction. Both joint members 3 and 4 are fixed by being fixed to the outer peripheral surface of the joint member and the inner peripheral surface of the inner joint member, respectively. The through holes 6 and 7 are water-stopped by, for example, biting a water-stopping material such as packing (not shown) into the fixing portion of the fixing member 5.

  The outer joint member 3 is formed in a cylindrical shape with a steel material, and is fixed to the end portion of the steel pipe by welding in an arrangement in which one end face is abutted against the end face of the steel pipe 1. The inner diameter of the outer joint member 3 is smaller than the inner diameter of the steel pipe 1.

  Further, a ring-shaped water blocking material 8 is fixed on the inner surface of the joint portion of the outer joint member 3 with the steel pipe 1 by adhering the outer peripheral surface 8a to the inner peripheral surface of the outer joint member 3 with an adhesive or the like. Has been.

  The water stop material 8 is formed of an elastic material such as a rubber material, and is formed in a shape having a tapered portion 8b on the inner joint member side as shown in FIG. 4, for example, and this tapered portion 8b is a tip portion of the inner joint member 4. So that the outer and inner side joint members 3 and 4 are water-stopped.

  In addition, the outer joint member 3 has a water stop reinforcing member 9 fixed therein to prevent unintentional deformation and dropping of the water stop member 8 due to water pressure and pressing of the inner joint member 4.

  The water stop reinforcing member 9 is integrally formed with a steel material, has a cylindrical deformation suppressing portion 9a and a flat plate ring shape, is supported by the inner peripheral surface of the outer joint member 3, and starts up on the inner surface side thereof. It is configured with the receiving portion 9b, and the deformation suppressing portion 9a is bent from the inner edge of the water-stopping material receiving portion 9b toward the connecting direction counterpart tube, that is, the L-shaped cross section is continuous in the circumferential direction. ing.

  In this water stop reinforcing member 9, the deformation suppressing portion 9a is arranged inside the water stop material 8, and the water stop material receiving portion 9b is the back side in the inner joint member insertion direction of the water stop material 8, that is, the outer joint member and the steel pipe. And is fixed in the outer joint member 3 by welding the outer peripheral edge of the water blocking material receiving portion 9b to the inner peripheral surface of the outer joint member 3.

  The inner joint member 4 is formed in a stepped cylindrical shape having a reduced diameter portion 4a inserted into the outer joint member 3, and an end portion is fixed to the end portion of the steel pipe 1 by welding.

  In addition, a tapered surface 4 b that is inclined from the outer periphery toward the inner peripheral tip side is formed at the distal end portion of the inner joint member 4, and the inner joint member 4 (reduced diameter portion 4 a) is fitted into the outer joint member 3. When combined, the water stop material 8 is pressed by the tapered surface 4b at the tip of the inner joint member and pressed against the water stop receiving member 9b side.

  In the water stop structure of the pipe joint 2 configured as described above, when the reduced diameter portion 4a of the inner joint member 4 is inserted into the outer joint member 3, as shown in FIG. 3 and the water stop reinforcing member 8 are fitted into a groove 10, and the tip of the inner joint member 4 is in elastic contact with the taper 8 b of the water stop material 8.

  At this time, the water stop material receiving portion 9b of the water stop reinforcement member 9 can counter the pressure in the inner joint member insertion direction by the water pressure and the inner joint member 4 by supporting the back side edge portion of the water stop material 8 in the insertion direction, The water blocking material 8 can be prevented from peeling off from the inner surface of the outer joint member 3.

  Moreover, since the water stop material 8 is surrounded by the water stop auxiliary member 9, it is possible to suppress the water stop material 8 from being deformed in an unintended direction by the water pressure and the inner joint member 4. The contact with the inner joint member 4 can be maintained in a stable state, and the water stop effect can be prevented from being hindered.

  In addition, in the above-mentioned Example, the deformation | transformation suppression which made the water stop auxiliary member the cylindrical shape of the arrangement which bent the water stop material receiving part 9b and the inner edge of the water stop material receiving part 9b toward the connection direction other pipe | tube side. Although the example which formed the L-shaped cross section in the shape which followed the circumferential direction with the part 9a was demonstrated, as shown in FIG. 6, FIG. 7, a water stop auxiliary member does not have the deformation | transformation suppression part 9a, It may be configured only by the material receiving portion 9b.

  Moreover, in addition to the structure of the water-stopping material receiving part 9b and the deformation suppressing part 9a described above, the water-stopping auxiliary member is connected to the connecting direction mating pipe from the outer edge part of the water-stopping material receiving part 9b as shown in FIGS. The outer tube portion 9c having a cylindrical shape bent to the side may be provided, and the U-shaped cross section may be continuous in the circumferential direction.

  In this case, the outer peripheral surface of the outer tube portion 9c is fixed to the inner surface of the outer joint member 3 by welding or the like, and the water blocking material 8 is fixed to the inner surface of the outer tube portion 9c.

  Further, as shown in FIGS. 10 and 11, the water-stop auxiliary member 11 may be formed such that the water-stopping material receiving portion has a circular cross section continuously formed in the circumferential direction.

  In addition, although the above-mentioned Example demonstrated the case where a steel pipe and a pipe joint were cylindrical shape, you may form in rectangular tube shape and other polygonal cylinder shape.

  Moreover, although the above-mentioned Example demonstrated the example which used the steel pipe as a tubular body, concrete pipe | tubes, such as a fume pipe | tube, etc. may be sufficient.

DESCRIPTION OF SYMBOLS 1 Steel pipe 2 Pipe joint 3 Outer joint member 4 Inner joint member 4a Tapered surface 5 Fixed member 6, 7 Through-hole 8 Water stop material 9 Water stop auxiliary member 10 Groove part

Claims (4)

The inner joint member supported by the other pipe end is inserted into the outer joint member supported by one pipe end, and the tip of the inner joint member is fixed to the inner peripheral surface of the outer joint member. In the water-stopping structure of the pipe joint, wherein the water-stopping material is brought into contact with each other so as to stop water between the inner and outer joint members.
The outer joint member includes a water-stop auxiliary member having an annular water-stop material receiving portion that is supported on the inner peripheral portion of the outer joint member and is raised on the inner surface side, and the water-stop material is the water-stop material. It is arranged on the front side in the insertion direction of the inner joint member of the receiving part, and when the two joint members are fitted, the water stop material is pressed against the water stop receiving member side at the tip of the inner joint member. The water-stop structure of the pipe joint as a feature   The water stop auxiliary member has a cylindrical deformation suppressing portion that is bent from the inner edge of the water stopping material receiving portion toward the connecting direction counterpart tube, and the deformation suppressing portion is formed of the water stopping material. The water stop structure for a pipe joint according to claim 1, wherein the water stop structure is arranged inside.   The water stop auxiliary member has a tubular outer tube portion arranged to be bent from the outer edge portion of the water stop material receiving portion toward the connection direction counterpart tube side, and the outer peripheral tube portion has the outer tube portion on the inner peripheral surface of the outer tube portion. The water stop structure for a pipe joint according to claim 1 or 2, wherein a water stop material is fixed.   The water stop structure for a pipe joint according to claim 1, wherein the water stop material receiving portion is formed such that a circular cross section continuously forms a ring shape in the circumferential direction.

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