JP2007192321A - Blocking joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely perform the blocking of a gas pipe by merely fitting a joint and also perform the unblocking for re-use without cutting plastic pipes in the blocking joint fitted for branching and projecting a branch pipe to a private land, blocking the pipe at the end part projecting to the private land until it is used, and opening it for re-use when the gas pipe is laid in a public road. <P>SOLUTION: This blocking joint B comprises both insertion parts 1 to which the plastic pipes are inserted for connection and a cylindrical body part 2 at the center. The both insertion parts 1 are eccentric, a flow passage 15 extending from one insertion part 1 to the other insertion part 1 forms a step 15a at the center, and a tilted partition wall 16 cutting off the flow passage is formed integrally with the step 15a. When the joint is opened, a hole saw 13 is screwed in until it breaks out a partition wall 7 and then make a hole in the partition wall 16. After the hole is made, the hole saw 13 is raised to remain it in the mounting hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shutoff joint that is used in plumbing work for water and sewerage and gas pipes using plastic pipes, and that shuts off the pipes until use and is opened during use.

  Taking gas pipes as an example, plastic pipes, especially polyethylene pipes, have been widely used as gas pipes in recent years, but pipes have been mainly buried in public roads. And when receiving gas supply for the construction of a new house, a pull-in work is performed by branching a branch pipe from the nearest gas pipe into the private area. It is necessary to excavate public roads, and in order to excavate public roads, procedures such as occupancy permission for the government are necessary, and above all, excavation up to public roads increases the amount of excavation, including its restoration work This was a factor that increased construction costs. Therefore, in recent years, when laying gas pipes on public roads, divide the branch pipe from the gas pipe in advance, draw the end part into the private area, attach a simple valve to the end part, and bury it in a blind state In addition, when receiving gas supply for new construction, etc., connecting the gas pipe laid on the private side and the end of the branch pipe with a joint and then opening the valve eliminates the need for excavating public roads Many methods are used. Although the valve used in this method is a simple valve, it is relatively expensive.If the valve is loosened for some reason after laying the branch pipe, gas leakage will occur or the period until use will become longer. The seal part such as rubber packing and o-ring may deteriorate and cause gas leakage.

In Patent Document 1 below, for example, when it is necessary to remove the gas pipe in the private area and stop the gas supply when the building is demolished, the ground pipe between the public road and the private area is excavated to expose the buried pipe. Then, after crushing and sealing the pipe at the parting point, the pipe on the private side is cut. After that, when resuming the gas supply, the existing pipe that has been crushed and sealed is sandwiched and fastened with a divided joint, and then the new pipe in the private area is connected to the joint, and then a cutting device is inserted into the joint. A method of cutting a sealed portion of an existing pipe is disclosed.
JP 2000-88141 A

  According to the construction method disclosed in Patent Document 1, the gas pipe can be shut off until use without using a valve, but the pipe is crushed and sealed before the gas supply is shut off and restarted. , A step of combining and fastening the joint, a step of connecting the new pipe to the joint, a step of cutting and opening the sealing portion with a cutting device, and a portion that is crushed and sealed In addition to lack of certainty in shutting off the gas, there is a concern that the opening is also crushed and the opening area is reduced because the cut portion is cut.

  It is an object of the present invention to provide a breaker joint that can be easily and surely cut off a pipe simply by attaching the joint, and can be opened without cutting the plastic pipe.

  The invention according to claim 1 is used in pipe work for water and sewage and gas pipes using plastic pipes, and is preferably a plastic pipe joint having a plurality of insertion parts to which plastic pipes are inserted and connected. , Having a partition wall that cuts off the flow path from one insertion part to the other insertion part, and a mounting hole in which the drilling tool can be advanced and retracted, and by pressing the drilling tool mounted in the mounting hole, It is characterized in that the whole or most of the partition wall can be perforated.

  In the joint according to the present invention, when three or more insertion portions are provided, all the flow paths may be blocked by one partition wall, or two or more partition walls may be provided to block the flow paths individually. May be.

  Any drilling tool may be used as long as it allows the partition wall to be perforated by pressing, and any type of drilling tool may be used. However, a hole saw and a cutting device disclosed in Patent Document 1 are exemplified. be able to. This drilling tool may be mounted in the mounting hole and embedded at the time of pipe embedding, or the mounting hole may be provided with a shutter as disclosed in Patent Document 1, for example, so that the mounting hole can be opened and closed. , Provide a partition wall that closes the mounting hole, open the mounting hole with the shutter at the time of opening, and then insert the drilling tool into the mounting hole and push it in, or push through the partition wall that plugs in the mounting hole and inserts You may make it. If the shutter is provided after opening, the drilling tool can be pulled out and removed, but if the shutter is not provided, the drilling tool is preferably kept in the mounting hole and buried.

  The invention according to claim 2 is characterized in that the flow path from one insertion port to the other insertion port of the invention according to claim 1 has a step, and the partition is formed in the step. .

  According to the breaker joint of the invention according to claim 1, it is possible to easily and reliably block the plastic pipe without requiring any processing to the plastic pipe simply by inserting and connecting the one insertion portion to the plastic pipe. It can be opened by pushing a drilling tool to make a hole in the partition wall, and the partition wall is opened regardless of the plastic tube, and the plastic tube is not deformed.

  According to the breaking joint of the invention according to claim 2, the opening area of the opening opened in the partition wall can be increased by enlarging the cross-sectional area of the step.

Hereinafter, the interruption | blocking coupling of embodiment of this invention is demonstrated with reference to drawings.
1 to 4 show the breaker joint of the first embodiment. The breaker joint A has a plug portion 1 into which polyethylene pipes 9 are inserted and heat-sealed on both sides, and a barrel portion in the center. 2 is a molded product made of polyethylene formed orthogonally, the body portion 2 is cylindrical, has a mounting hole 3 into which a hole saw described later is screwed, and an annular groove 4 is formed at the upper part on the outer periphery. Screws are engraved on. A cap 5 is screwed in from above. In the figure, 6 is an o-ring mounted in the annular groove 4 for sealing.

  The body 2 is also integrally formed with a partition wall 7 that closes the mounting hole 3 at the bottom of the mounting hole 3, and an air vent 8 is formed in the partition wall 7.

  A partition wall 11 is integrally formed at the center of both insertion portions 1 to block the flow path 10 from one insertion portion 1 to the other insertion portion 1. This partition wall 11 forms a channel 12 with a segment-like rising portion 11a rising from a peripheral surface facing the air vent 8, a horizontal wall portion 11b extending from the end of the rising portion 11a in the axial direction, and an end of the horizontal wall portion. The curved wall 11c is formed by connecting the inner peripheral surfaces of the joint A, and most of the lateral wall portion 11b and the curved wall 11c are located within the extension range of the mounting hole 3 as shown by the one-dot chain line in FIG. However, it can be cut by a hole saw 13 which is a drilling tool described later.

  In the future, when pipe work is performed to supply gas to a private area, the joint A is attached to the branch pipe branched from the gas pipe, and then the cap 5 and the hole saw 13 of the joint A are removed, and the air is vented from the air vent 8. Then, after the gas starts to come out, the hole saw is screwed into the mounting hole 3 and inserted, and after the cap is attached, it is buried. After the pipe construction on the public road, when it is necessary to supply gas into the private area, after connecting with a new pipe piped in the private area, the cap 5 is removed, the hole saw 13 is screwed in, and the partition wall 7 is cut. Break through. Subsequently, by further screwing the hole saw 13, both sides of the curved wall 11c and finally the base of the lateral wall portion 11b are cut to make a hole. After drilling, the hole saw 13 is pulled up and retained in the mounting hole. Then, the cap 5 is screwed in and attached. FIG. 4 shows a cross section of the flow path 12 after opening, and a part of both sides of the rising portion 11a and the curved wall 11c protrudes and remains in the flow path.

  Although the interruption | blocking coupling A of the said embodiment is heat-seal | fused with the polyethylene pipe | tube 9, you may make it electrofuse. The hole saw 13 is not mounted and buried in the joint A after pipe construction on a public road, but a new pipe piped in a private area is connected to the joint A and then inserted into the mounting hole 3 of the joint A to drill. You may make it do.

  FIG. 5 shows the breaking joint B of the second embodiment. The same reference numerals are given to the same structural parts as the joint A shown in FIG.

  The insertion part 1 on both sides of the joint B is eccentric, and the flow path 15 from one insertion part 1 to the other insertion part 1 forms a step 15a at the center, and the flow path is blocked by the step 15a. An inclined partition wall 16 is integrally formed.

  The same operation as that of the joint A is performed in the joint B. That is, when performing pipe construction on a public road, after fitting the joint B to the branch pipe branched from the gas pipe, removing the cap 5 and the hole saw 13 of the joint B, and then venting the air, the cap 5 and the hole saw 13 are then removed. Install and bury. In the future, when gas is supplied into the private area by supplying gas, the cap is removed after the new pipe connected in the private area is connected to the joint B, and the hole saw 13 is used for drilling. FIG. 6 shows a cross section at the step 15a of the flow path 14 after perforation.

  FIG. 7 shows an application example of the breaker joints A and B according to the present invention. When the gas pipe 22 is laid on the public road 21, the branch pipe 24 branches off on the private land 23 side and projects into the private land. Install the cut-off joints A and B at the end to be used.

  As another application example, it is used for a connecting portion between gas pipes. For example, independent gas pipes are provided on each floor of a high-rise building, and the above-described breaker joints A and B are attached to portions connecting the gas pipes on each floor. By opening the cut-off joints A and B on each floor in order, gas is sequentially conducted to each floor.

  The above is an example applied to gas piping, but the same applies to water and sewage pipes.

  The interrupting joint of the present invention is, for example, blindly interrupting the end of the branch pipe branched from the water and sewage system or gas pipe buried in the public road until use, or connecting the pipes to each other. Can be used to block until use.

Sectional drawing of the branch joint of 1st Embodiment. The expanded sectional view in the CC line of FIG. Sectional drawing after opening. The expanded sectional view in the CC line after opening. Sectional drawing of the branch joint of 2nd Embodiment. The expanded sectional view in the DD line of FIG. 5 after opening. Schematic which shows the example of application of the branch joint concerning this invention.

Explanation of symbols

1 .. Insert 2.. Body 3.. Mounting hole 4. Ring groove 5. Cap 6.. O-rings 7, 11, 16. · · Channel 13 · · Hole saw 15a · · Step 21 · · Public road 22 · · Gas pipe 23 · · Private land A, B · · Breaking joint

Claims (2)

  In plastic pipe joints with multiple plugs that are used to connect water pipes and gas pipes with plastic pipes, plastic pipes are inserted and connected, from one plug-in part to another. A partition wall that blocks the flow path to reach and a mounting hole through which the drilling tool can be advanced and retracted. By pushing the drilling tool mounted in the mounting hole, all or most of the partition wall can be drilled. A cut-off joint characterized by that.   2. The breaker joint according to claim 1, wherein the flow path from one insertion port to another insertion port has a step, and the partition is formed in the step.

Images