JPH09126380A - Branched saddle joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shut off a fluid in a pipe securely and simplify the repair work by constituting a branched saddle joint by a curved saddle section and a branch joint section, providing a groove which surrounds a branch hole on a rear surface of the saddle section, and mounting a seal packing on the groove. SOLUTION: A branched saddle joint 1 consists of a curved saddle section 11 and a branch joint section 12, and the saddle section 11 is formed at equal curvature to outer periphery of a pipe P1. A groove 13 which surrounds a branch hole communicating with the branch joint section 12 is provided on a rear surface of the saddle section 11, and a seal packing 2 is mounted on the groove 13. The pipe repair work is done by repairing a broken section of the pipe P1 temporarily, nipping the pipe P1 by the saddle section 11 of the branch saddle joint 1 which is branched on the downstream side and an auxiliary member 11a, and press-fitting the seal packing 2 on an outer peripheral face of the pipe. Each branched saddle joint 1 is connected by using bypass pipes, an air bag 4 is inserted into the pipe P1 from an air bag insertion port 31 to blow pressure fluid into it, and the inside of the broken section of the pipe is blocked. Fluid in the pipe flows by the bypass pipes to repair the broken section of the pipe P1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch saddle joint which can be suitably used for repairing a damaged portion when a part of a pipeline such as gas is damaged.

[0002]

2. Description of the Related Art Conventionally, in a gas pipe line made of polyethylene or the like, when one portion of the pipe is damaged and a fluid leakage accident occurs in the pipe, the damaged portion is repaired without interrupting the flow of the fluid in the pipe. Is being done. This repairing method will be briefly described below with reference to FIGS. 4 to 7.

First, as shown in FIG. 4, a tape or the like is wound around the damaged portion A of the pipe P1 to temporarily interrupt the ejection of the fluid in the pipe such as gas. Therefore, as shown in FIG.
Gas pipe a on the upstream side and the downstream side of the pipe P1 close to
Are connected to each other, and a cutter is inserted into each of the uninterrupted gas joints a to form a through hole in the pipe wall, and then each of the uninterrupted gas joints a and a is connected by a bypass pipe P2.

Next, as shown in FIG. 6, the upstream and downstream sides of the pipe P1 are squeezed to block the flow of fluid in the pipe, and the damaged portion A is cut off for a predetermined length and then cut off. The short pipe P3 is interposed in the portion. Therefore, as shown in FIG. 7, the short pipe P3 and the cut end of the pipe P1 are connected through an exchange joint d, the squeeze c is released to remove the bypass pipe P2, and then the opening of the continuous gas joint a is established. The end was closed with a cap e.

[0005]

However, in the case of this conventional method, when the diameter size of the pipe made of polyethylene or the like becomes large, it takes time and effort to squeeze the vicinity of the damaged portion, and the flow of the fluid in the pipe is completely eliminated. I couldn't shut it off. That is, since the pipe wall inevitably becomes thicker as the diameter size of the pipe increases, it may not be possible to completely block the flow of the fluid in the pipe simply by sandwiching the pipe from above and below and crushing it into a flat shape. In addition, there is a risk that the pipe may be broken due to cracks in the squeezed portion during long-term use. The present invention solves such a problem, and provides a branch saddle joint that can reliably shut off the flow of a fluid in a pipe to easily perform repair work.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a branch saddle joint used when repairing a damaged portion of a piping line, which comprises a curved saddle portion and a branch joint portion protruding from the upper surface of the saddle portion. In addition, a groove is provided on the curved back surface of the saddle portion, and a seal packing is attached to the groove.

When the saddle portion of the branch saddle joint is pressed against the outer peripheral surface of the piping line during repair work, the seal packing attached to the curved surface of the saddle portion is in close contact with the outer peripheral surface of the pipe to ensure sealing performance. It In addition, by connecting an auxiliary member for a constant gas joint to the branch joint portion and inserting the air bag into the pipe through the auxiliary member and then inflating the same, the inside of the pipe near the damaged portion can be easily made by the air bag. Since it can be closed, repair work can be performed easily.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a sectional view showing an embodiment of the branch saddle joint of the present invention, FIG. 2 is a front view showing a connecting process of piping, and FIG. 3 shows a step of inflating an air bag inserted into the piping to close the inside of the piping. In the drawings, reference numeral 1 is a branch saddle joint and 2 is a seal packing.

The branch saddle joint 1 of the present invention comprises a curved saddle portion 11 made of a synthetic resin such as vinyl chloride resin, polyethylene or polybutene, and a branch joint portion made of cast iron, gun metal or the like protruding from the upper surface of the saddle portion 11. 12 and the saddle portion 11 is curved and formed with a curvature substantially equal to the outer circumference of the pipe P1. A groove 13 is provided on a curved back surface of the saddle portion 11 so as to surround a branch hole communicating with the branch joint portion 12, and the seal packing 2 is attached to the groove 13. Further, the male screw 12 is provided at one end of the branch joint portion 12.
0 is provided. The branch saddle joint 1 can be manufactured, for example, by setting the branch joint portion 12 in a mold and injection molding a molten resin.

When repairing a pipe using the branch saddle joint 1, a tape or the like is wound around the damaged portion of the pipe P1 in advance to perform a temporary repair as described in the conventional method (see FIG. 4). reference). Therefore, as shown in FIG. 2, the branch saddle joint 1 of the present invention is connected to the upstream side and the downstream side of the pipe P1 approaching the damaged portion. At this time, the pipe P1 is held between the saddle portion 11 of the branch saddle joint 1 and the auxiliary member 11a, and the seal packing 2 attached to the back surface of the saddle portion 11 can be pressure-tightly connected to the outer peripheral surface of the pipe for airtight connection. .

Next, the auxiliary member 3 of the uninterrupted gas joint is connected to the branch joint portion 12 of each branch saddle joint 1, and a cutter (not shown) inserted in the auxiliary member 3 penetrates the pipe wall of the pipe P1. After forming the holes, the respective branch saddle joints 1 and 1 are connected by a bypass pipe P2. And
The air bag 4 is inserted into the pipe P1 from the air bag insertion port 31, and the pressure fluid is blown from the conduit 41 to inflate the air bag 4 to close the inside of the pipe near the damaged portion.

The air bag 4 is located inside the pipe near the damaged portion.
When blocked by, the in-pipe fluid such as gas in the pipe P1 flows through the bypass pipe P2. Therefore, as shown in FIG. 2, the damaged portion of the pipe P1 is cut over a predetermined length, and the short pipe P3 is interposed in the cut portion to exchange the short pipe P3 with the cut end of the pipe P1. After connecting using the joint 5, the airbag 4 is removed.

After repairing the damaged portion of the pipe P1 in this manner, the valves of the respective auxiliary members 3 are closed to remove the bypass pipes P2, and the plugs inserted through the auxiliary members 3 are used to connect the pipe wall of the pipe P1. The drilled through hole is closed. After that, the auxiliary member 3 is removed, and the plug is covered with a repair member to complete the repair work.

[0014]

As described in detail above, in the branch saddle joint of the present invention, since the groove is provided on the curved back surface of the saddle part and the seal packing is attached to the groove, the broken portion generated in the piping line can be easily It can be repaired. In other words, the saddle portion of the branch saddle joint can be connected airtightly by simply pressing the saddle portion against the outer peripheral surface of the pipe for connection, and there is no possibility that the fluid in the pipe will leak from the repaired portion.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a branch pipe joint of the present invention.

FIG. 2 is a front view showing a process of connecting pipes.

FIG. 3 is a half cross-sectional front view showing a step of inflating an air bag inserted into a pipe to close the inside of the pipe.

FIG. 4 is a front view of a conventional example showing a state where a damaged portion of a pipe is temporarily repaired.

FIG. 5 is a front view of a conventional example showing a state in which uninterrupted gas couplings connected to an upstream side and a downstream side of a pipe are connected by a bypass pipe.

FIG. 6 is a front view of a conventional example showing a process of connecting a short pipe interposed at a damaged portion and an end of a pipe through an exchange joint.

FIG. 7 is a front view of a conventional example showing a state in which the open end of the uninterrupted gas coupling is closed with a cap.

[Explanation of symbols]

 1 Branch saddle joint 2 Seal packing 3 Persistent gas joint auxiliary member 4 Air bag 5 Exchange joint P1 pipe P2 Bypass pipe P3 Short pipe

Claims (1)

[Claims] 1. A curved saddle part (11) and a branch joint part (12) protruding from the upper surface of the saddle part (11), and a curved rear surface of the saddle part (11) surrounding a branch hole. A branch saddle joint characterized in that a groove (13) is provided and a seal packing (2) is attached to the groove (13).