JP2009144818A - Branch joint seal member - Google Patents

Abstract

When a branch pipe is connected to a main pipe such as a gas pipe by a branch joint, even if the branch joint buckles and deforms due to ground fluctuation due to an earthquake, the fastening pressure of the branch joint does not increase. Further, leakage of gas or the like can be surely prevented.
A branch joint sealing member interposed between a branch joint (T) for connecting a branch pipe 9 to a main pipe 12 and the main pipe 12 includes a substrate 1 and at least one of the substrates 1. The substrate 1 and the partition wall 2 are both made of a soft material such as rubber, and the partition wall 2 intersects vertically and horizontally.
[Selection] Figure 4

Description

  This invention relates to a sealing member for a branch joint, and in particular, when a branch pipe is connected to a main pipe such as a gas pipe by a branch joint, even if the branch joint buckles and deforms due to ground fluctuation due to an earthquake, etc. The present invention relates to a sealing member for a branch joint that can reliably prevent leakage of gas or the like without increasing the fastening pressure of the joint for use.

  JP, 7-217785, A discloses a sealing member for a branch joint for connecting a branch pipe to a main pipe such as a gas pipe buried in the ground. Hereinafter, this seal member is referred to as a conventional seal member and will be described with reference to the drawings.

  FIG. 6 is a cross-sectional view showing one sheet of a conventional seal member, and FIG. 7 is a front view showing a branch portion in which a branch joint is mounted on a main pipe using the conventional seal member.

  As shown in FIG. 6, one sheet 3 of the conventional sealing member B has a three-layer structure in which a surface rubber layer 5 softer than the intermediate rubber layer 4 is bonded to both surfaces of the intermediate rubber layer 4 and the intermediate rubber layer 4. Thus, the other sheet 6 of the conventional sealing member B is made of a single-layer rubber plate.

  As shown in FIG. 7, the branch joint (T) is composed of one sleeve piece 7 and the other sleeve piece 8 each having a semi-cylindrical shape. Is formed, and a branch portion 10 having an opening 10A is formed. A groove 7A into which the O-ring 11 is inserted is formed on the inner surface around the opening 10A of the branch portion 10 in one sleeve piece 7, and the gas from the joint portion is inserted by inserting the O-ring 11 into the groove 7A. Etc. are prevented. One sleeve piece 7 and the other sleeve piece 8 are attached to a main pipe 12 such as a gas pipe by a fastening bolt 13.

  In order to connect the branch pipe 9 to the main pipe 12 with the branch joint (T) using the conventional seal member B, first, one sheet 3 is connected to the main pipe 12 and the branch port opened in the main pipe 12. 12A is attached to the upper half of the main pipe 12 so as not to be blocked. Next, one sleeve piece 7 is placed on one sheet 3. At this time, the O-ring 11 is inserted into the groove 7 </ b> A of one sleeve piece 7. Next, the other sheet 6 is attached to the lower half of the main pipe 12. Next, the other sleeve piece 8 is put on the other sheet 6, and both sleeve pieces 7 and 8 are fastened to each other by bolts 13. Then, the branch pipe 9 is screwed into the opening 10 </ b> A of the branch portion 10.

  As described above, by attaching the branch joint (T) to the main pipe 12 via the conventional seal member B, the branch joint is buckled due to ground subsidence or the like, and the seal by the O-ring 11 is incomplete. Even so, the soft surface rubber layer 5 of one of the sheets 3 is elastically deformed and enters the intervening interval of the O-ring 11, so that leakage of gas or the like can be prevented.

JP-A-7-217785

  However, since the conventional seal member B has a flat plate shape and a limited plate thickness, as shown in FIG. 8A, when the branch joint (T) is not buckled and deformed. Since the conventional seal member B and the branch joint (T) are in surface contact with each other, the seal effect of the conventional seal member B is exhibited. However, as shown in FIG. 8B, the branch joint (T) Since the conventional seal member B and the branch joint (T) are in point contact with each other, the sealing effect of the conventional seal member B is drastically reduced. If the fastening pressure of the branch joint (T) is increased, the sealing effect is increased correspondingly, but if the fastening pressure is increased, the main pipe 12 is adversely affected.

  Therefore, in the present invention, when a branch pipe is connected to a main pipe such as a gas pipe by a branch joint, the fastening pressure of the branch joint increases even if the branch joint buckles and deforms due to ground fluctuation due to an earthquake, etc. An object of the present invention is to provide a branch joint sealing member that can reliably prevent leakage of gas or the like without any trouble.

  The present invention has been made to achieve the above object, and is characterized by the following.

  The invention according to claim 1 is a sealing member for a branch joint interposed between a branch joint for connecting a branch pipe to a main pipe and the main pipe, and includes a substrate and at least one of the substrates. The substrate and the partition wall are both made of a soft material, and the partition wall intersects vertically and horizontally.

  The invention according to claim 2 comprises a partition wall intersecting vertically and horizontally in a branch joint seal member interposed between a branch joint for connecting a branch pipe to the main pipe and the main pipe, The partition wall is made of a soft material.

  The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, the soft material is made of rubber.

  According to this invention, since the closed space is formed between the branch joint and the main pipe by the partition walls made of a flexible material such as rubber, which intersects each other in the vertical and horizontal directions, ground deformation due to an earthquake is caused. Even if the branch joint is buckled and deformed due to the above, etc., gas or the like stays in this closed space and does not flow out to the outside. Accordingly, leakage of gas or the like from the branch joint (T) can be reliably prevented. In addition, since this closed space is easily formed by applying a small force to the seal member, it is not necessary to increase the fastening force of the branch joint. Therefore, the main pipe is not adversely affected by the increase of the fastening force.

  Next, an embodiment of the sealing member for a branch joint according to the present invention will be described with reference to the drawings.

  1 is a partial perspective view showing a seal member of the present invention, FIG. 2 is a partial perspective view showing another seal member of the present invention, and FIG. 3 is a perspective view showing a main tube around which the seal member of the present invention is wound. FIG. 4 and FIG. 4 are exploded perspective views of a branch portion in which a branch joint is mounted on a main pipe around which a seal member of the present invention is wound. FIG. 5 is a view showing a sealing state of the sealing member of the present invention, and (a) is a partial cross-section showing a contact state between the sealing member A of the present invention and the branch joint (T) which is not buckled and deformed. It is a figure and (b) is a fragmentary sectional view which shows the contact state of the sealing member A of this invention, and the joint (T) for buckling deformation.

  As shown in FIGS. 1 to 4, the sealing member A of the present invention includes a substrate 1 and partition walls 2 that protrude integrally with the substrate 1 on both front and back surfaces of the substrate 1. Each of the substrate 1 and the partition wall 2 is made of a soft material such as rubber, and the partition wall 2 intersects vertically and horizontally in a lattice shape. The partition wall 2 may be crossed so as to have a polygonal shape such as a rhombus or a pentagon, in addition to crossing in a lattice shape.

  According to the seal member A of the present invention, when the branch joint (T) is not buckled, the partition wall 2 of the seal member A is connected to the branch joint (T) as shown in FIG. And the main pipe 12 are in close contact with each other and sealed. On the other hand, when buckling deformation occurs in the branch joint (T), as shown in FIG. 5 (b), the ratio of the partition wall 2 that contacts the branch joint (T) decreases, and accordingly, Although it seems that the sealing performance is lowered, the gas or the like in the main pipe 12 flows into the closed space (S) formed by the branch joint (T) and the partition wall 2 and flows out to the outside. Absent. Accordingly, leakage of gas or the like from the branch joint (T) can be reliably prevented.

  Moreover, since the closed space (S) is easily formed by applying a small force to the seal member A, it is not necessary to increase the fastening force of the branch joint. Therefore, the main pipe 12 is not adversely affected by an increase in fastening force.

  In order to connect the branch pipe 9 to the main pipe 12 by the joint for branch (T) using the sealing member A of the present invention configured as described above, the following is performed.

  The branch joint (T) is the same as that shown in FIG. That is, the branch joint (T) is composed of one sleeve piece 7 and the other sleeve piece 8 each having a semicylindrical shape, and a branch pipe 9 is connected to an upper center portion of the one sleeve piece 7. A branch portion 10 having an opening 10A is formed. A groove 7A into which the O-ring 11 is inserted is formed on the inner surface around the opening 10A of the branch portion 10 in one sleeve piece 7, and the gas from the joint portion is inserted by inserting the O-ring 11 into the groove 7A. Etc. are prevented. One sleeve piece 7 and the other sleeve piece 8 are attached to a main pipe 12 such as a gas pipe by a fastening bolt 13.

  First, as shown in FIG. 3, the seal member A of the present invention is wound around the main pipe 12. In this case, the branch port 12A formed in the main pipe 12 is wound so as not to be blocked. Next, as shown in FIG. 4, one sleeve piece 7 and the other sheet 6 are put on the seal member A. Next, the sleeve pieces 7 and 8 are fastened to each other by bolts (not shown). Then, the branch pipe 9 is screwed into the opening 10 </ b> A of the branch portion 10.

  As described above, when the branch joint (T) is attached to the main pipe 12 through the seal member A of the present invention, the branch joint is buckled due to ground subsidence or the like, and the seal by the O-ring 11 is incomplete. Even in this case, the gas or the like in the main pipe 12 flows into the closed space (S) formed by the branch joint (T) and the partition wall 2 and does not flow out to the outside. Accordingly, leakage of gas or the like from the branch joint (T) can be reliably prevented.

  Moreover, since the closed space (S) is easily formed by applying a small force to the seal member A, it is not necessary to increase the fastening force of the branch joint. Therefore, the main pipe 12 is not adversely affected by an increase in fastening force.

  In the above example, the sealing member A is configured by the substrate 1 and the partition wall 2 protruding integrally with the substrate 1 on both the front and back surfaces of the substrate 1. 1 may be formed integrally with the partition wall 2 or, as shown in FIG. 2, the substrate 1 may be eliminated and only the partition wall 2 may be crossed vertically and horizontally.

It is a fragmentary perspective view which shows the sealing member of this invention. It is a fragmentary perspective view which shows the other sealing member of this invention. It is a perspective view which shows the main tube around which the sealing member of this invention was wound. It is a disassembled perspective view of the branch part which attached the joint for branch to the main pipe around which the sealing member of this invention was wound. It is a diagram showing a seal state of the seal member of the present invention, (a) is a partial cross-sectional view showing a contact state between the seal member A of the present invention and the branch joint (T) not buckling deformed, (B) is a fragmentary sectional view which shows the contact state of the sealing member A of this invention, and the joint (T) for buckling deformation. It is sectional drawing which shows one sheet | seat of the conventional sealing member. It is a front view which shows the branch part which attached the joint for branch to the main pipe using the conventional seal member. It is a figure which shows the sealing state of the conventional sealing member, (a) is a fragmentary sectional view which shows the contact state of the joint for branch (T) which has not been buckled and deformed with the conventional sealing member B, (b) FIG. 5 is a partial cross-sectional view showing a contact state between a conventional seal member B and a branch joint (T) that is buckled and deformed.

Explanation of symbols

1: Substrate 2: Partition wall 3: One sheet 4: Intermediate rubber layer 5: Surface rubber layer 6: The other sheet 7: One sleeve piece 7A: Groove 8: The other sleeve piece 9: Branch pipe 10: Branch portion 10A: Opening 11: O-ring 12: Main pipe 12A: Branch port 13: Bolt

Claims (3)

In the sealing member of the branch joint, interposed between the branch joint for connecting the branch pipe to the main pipe and the main pipe,
A substrate and a partition wall projecting from at least one surface of the substrate; both the substrate and the partition wall are made of a soft material, and the partition wall intersects vertically and horizontally. A seal member for a branch joint. In the sealing member of the branch joint, interposed between the branch joint for connecting the branch pipe to the main pipe and the main pipe,
A seal member for a branch joint, comprising partition walls intersecting vertically and horizontally, wherein the partition walls are made of a soft material.   3. The branch joint seal member according to claim 1, wherein the soft material is made of rubber.

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