JPS61136070A - Shutoff valve for gas conduit - Google Patents

Abstract

PURPOSE:To fit a gas conduit with valves etc. easily and quickly while gas supply is continued, by utilizing the sleeve body as the shell of a shutoff valve, and by installing a core in the pipe with a cylinder 16 interposed. CONSTITUTION:Sleeve body 1 is installed at that part of a gas conduit a where a shutoff valve is to be furnished, and a hole b is bored over an opening 4 of the sleeve 1 using a boring machine. Then a cylinder 16 is installed at the opening 4 with a screw 5 and an external screw 17. A fastening shaft 9 equippd at its bottom with a core 7 is previously incorporated in this cylinder through utilization of a female screw 15 of a pressure device 13. If thereafter this fasten ing shaft 9 is rotated, the pressure device 13 sinks in the cylinder to press the oversurface of the core 7, which extrudes in the circumferential direction to come in close contact with the periphery of the hole b and the inner surface of gas conduit a.

Description

DETAILED DESCRIPTION OF THE INVENTION Φ Industrial Application Field The present invention relates to a shutoff valve that can be installed while supplying gas to an existing gas conduit.

・Prior art and its drawbacks In order to install a cutoff valve on a part of a gas pipe later, as shown in Fig. 5, part O1 of the gas pipe is cut and removed, and valve 03 and joint 05 are inserted here. It is connected to the attached piping unit) 04. In addition, when installing the shutoff valve during construction, a gas bag (gas bag) must be inserted into the gas pipe to prevent gas from leaking out from the cut point. However, if such construction methods were adopted, gas would be inconvenient for consumers as they would not be able to use the gas.

Therefore, a construction method has been proposed in which a separate pipe 07 is installed to bypass the cut point to ensure the gas supply while the shutoff valve is installed. It is necessary to excavate a large construction hole for the purpose of use, and it takes a lot of work to install the bypass pipe 07 and gas stopper 06, etc., and the amount of backfilling soil also increases, so the construction cost is very high. There is a problem.

- Purpose of the present invention The purpose of the present invention is to propose a shutoff valve that can be easily and quickly installed on a part of a gas pipe while continuing the supply of gas.

・Structure of the present invention In order to achieve the above-mentioned object, the present invention has a sleeve main body which has a top and bottom split structure, an opening in the center of the sleeve side, and a screw in the opening, and a bottomed hole in the center. It consists of a core made of a sponge or rubber-like elastic body with a female thread and a flange-type press plate with a guide pin protruding laterally on the top, a screw on the shaft body, and a corner section on the top end. A tightening shaft formed by forming a screw hole, an external screw screwed into the screw provided in the opening of the upper sleeve at the lower end, a shaft hole through which the tightening shaft passes through the center of the top plate, and a shaft hole formed on the inner wall surface. The present invention proposes a shutoff valve comprising a cylinder provided with a slide groove into which the guide pin engages.

” - The cutoff valve with the components listed above is first installed using bolts on a part of the gas pipe where the cutoff valve is installed, and then a drilling machine is attached to the opening of the sleeve body and a hole saw is installed. Drill a hole in the gas pipe using the screwdriver, then remove the punch, attach the core to the tip of the tightening shaft using the female screw of the press plate, and insert the core into the top corner of the tightening shaft. Attach the cylinder protruding from the shaft hole to the opening of the upper sleeve. Therefore, when the tightening shaft is rotated using a wrench, a suppression plate screwed onto the tightening shaft pushes the core down into the pipe, and then presses one side of the core.

As a result, the core bulges laterally (circumferentially) and comes into close contact with the previously perforated hole of the gas conduit and the inner surface of the gas conduit. This action stops the gas. When it is desired to restart the gas flow, the tightening shaft is reversed, and the core is pulled out of the tube by the action of the internal thread of the suppression plate. As a result, the gas conduit is opened.

・Embodiment FIG. 1 shows an exploded perspective view of the shutoff valve according to the present invention,
Reference numeral 1 denotes a sleeve main body which is divided into upper and lower halves, 2 is a lower sleeve, and 3 is an upper sleeve, and an opening 4 in which a screw 5 is cut is formed in the center of the upper sleeve 3. 6 is a bolt for tightening the upper and lower sleeves 2.3.

7 is a rubber core, and a bottomed 68 is provided in the center of this core. Note that the material of the core 7 may be other elastic bodies such as sponge in addition to the above-mentioned rubber.

Reference numeral 9 denotes a tightening shaft having a screw 10 cut into the shaft body and a corner 12 formed at the upper end for engaging a spanner or the like.

Reference numeral 13 is a suppression plate which is provided with a female screw 15 in the center into which the screw 10 of the tightening shaft 9 is screwed, has a guide pin 11 protruding from the side, and is integrally attached to one surface of the core 7.

Reference numeral 16 is hollow inside, and an external screw 17 is cut on the outer periphery of the lower end to be screwed into the screw 5 provided in the opening 4, and the corner 12 of the tightening shaft 9 protrudes from the center of the top plate. This cylinder is provided with a shaft hole 18 and a wrench engaging portion 19 formed on the outer peripheral surface of the body.

20 is a cap that is placed over the shaft hole 18 of the cylinder 16, and 21 is an E-ring that fixes the tightening shaft 9.

Next, a method for installing (assembling) the above-mentioned shutoff valve will be explained based on FIG. 2.

First, to install the cutoff valve on the gas conduit a, attach the sleeve body 1 to the location, and then place the sleeve body 1 on the entrance part 4 of the sleeve body 1.
A perforator (not shown) is attached and a hole is made in the gas conduit a using a hole saw. This hole may be formed only on the upper side of the pipe, or it may be made by drilling (cutting) the gas conduit a completely within the sleeve body l. Next, the punch is removed, and the cylinder 16 is attached to the opening 4 using the screw 5 and the external screw 17. Note that a tightening shaft 9 with a core 7 attached to its lower end is pre-assembled into the cylinder 16 using the female screw 15 of the suppression plate 13. Once the cylinder 16 has been installed, turn the corner 12 of the tightening shaft 9 with a spanner. In this way,
Since the rotation of the pressing plate 13 is prevented by the guide pin 11, the pressing plate 1 screwed into the screw lO of the tightening shaft 9
3 descends within the cylinder 16 and forces the core 7 together into the tube. When the core 7 reaches the inside of the pipe, the pressing plate 13 further presses the upper surface of the core 7, causing the core 7 to bulge in the circumferential direction. Due to this swelling action, the core 7 comes into close contact with the periphery of the previously drilled hole and the inner surface of the gas conduit a. As a result, the gas flow is stopped. If it is desired to restart the gas flow, turn the tightening shaft 9 in the opposite direction. In this way, the pressing force @13 increases, the swelling effect of the core 7 is released, and the core 7 is subsequently pulled out of the tube.

FIG. 4 is a perspective view showing the installation completed, and FIG. 3 shows the gas conduit a completely cut inside the sleeve body 1.
An example of electrical insulation is shown, and the diameter of the hole saw of the drilling machine used in this case is larger than the diameter of the gas conduit.

- Effects of the present invention As described above, the present invention first attaches the sleeve body 1 to the gas conduit a, then drills the hole in a leak-free manner, and then uses this sleeve body 1 as the outer shell of the shutoff valve. However, since the core 7 (valve) is installed inside the pipe via the cylinder 16, the following effects can be expected.

a. Since there is no need to cut out a certain section of the gas conduit a, install a bypass pipe, or install a gas stopper as in the conventional method, the work and costs related to these can be saved.

b. In order to install a bypass pipe or a gas stopper, it is necessary to excavate a large working hole, which causes traffic obstruction and requires a lot of cost to backfill. However, according to the present invention, the conventional l/ Since only two holes are required, costs associated with excavating and backfilling these work holes are also saved.

A core 7 is attached to the tip of the C0 tightening shaft 9, and sealing is performed by the swelling action of this core 7, so by selecting the size and material of the core 7, a perfect sealing action can be achieved. If Core 7 has deteriorated over time,
The cylinder 16 can be removed and only the core replaced with a new one.

d. As shown in Fig. 3, the gas conduit a is completely cut off within the sleeve body l, and an insulating material 22 is inserted between the sleeve body l and the pipe, so that the shutoff valve of the present invention can be used as an insulating joint. can also be made to work.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a shutoff valve according to the present invention, Fig. 2 is a cross-sectional view of a state in which a cutoff valve is constructed by providing a perforation hole only above the gas conduit, and Fig. 3 is a complete view of the gas conduit. FIG. 4 is a perspective view of the shutoff valve according to the present invention actually installed in a gas pipe, and FIG. 5 is a conventional cutoff valve. FIG. 2 is a perspective view showing an example of the installation of the shutoff valve. 1... Sleeve body, 2... Lower sleeve, 3... Upper sleeve, 4... Opening, 7... Core, 9 ......Tightening shaft, 13.
...Press plate, 16...Cylinder, 20
······cap. Patent Applicant: Tokyo Gas Co., Ltd. Figure 1--1

Claims (1)

[Scope of Claims] A sleeve main body having an opening in the center of the upper sleeve side having a top and bottom split structure and having a screw installed in the opening, and a sponge or rubber-like elastic material having a bottomed hole in the center. It consists of a core with a pressing plate attached to the top with a flange that has a female screw and a guide pin protruding laterally, and a tightening shaft with a screw on the shaft body and a corner formed on the upper end. , An external screw is provided at the lower end to be screwed into the screw provided in the opening of the upper sleeve, and a shaft hole through which the tightening shaft passes is provided in the center of the top plate, and a slide groove in which the guide pin engages is provided in the inner wall surface. A shutoff valve attached to a cylinder comprising a cylinder and a gas conduit comprising.