JPS6347337Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial application field] This invention relates to a water control valve that is attached to a divided pipe with a valve for non-stop water construction work. This work valve is a split pipe with a work water control valve (hereinafter referred to as a work valve) used in non-water cutoff construction work in which a hole is drilled and a water control valve is installed in the state, so-called split pipe with a water cutoff valve for non-water cutoff work. This article relates to improvements to the structure of the valve cover of the water control valve that is attached to the top. Here, "uninterrupted water supply" is not limited to water only, but is a general term for carrying out construction work in which the flow of gas and liquid fluids is kept flowing without stopping it with a pre-installed stopper (main stopper). means.

[Conventional technology]

The applicant previously filed Utility Application No. 56-174117
No. 62-31752), we proposed a split pipe with a work valve for continuous water cut-off drilling work. That is,
According to this invention, a work valve for construction work is integrally assembled with the split pipe, and a water control valve for shutting off the fluid pipeline is attached to the outside of this work valve.
As seen in Publication No. 336, the flow path of the fluid pipe can be blocked without requiring special equipment such as an insertion machine. In this case, the working valve remains in place even after the flow path is shut off. However, in this prior art, the length (height) of the valve cover of the water control valve is such that a feed rod is built in that is long enough to move the water control valve body from the top of the working valve to the bottom of the fluid pipe. Due to the necessity, the price is quite high. For this reason, when a fluid pipe is buried relatively shallowly below the ground surface, the valve cover of the water control valve installed on the fluid pipe protrudes from the ground surface, causing an obstruction to traffic, etc., and causing permanent damage to the water control valve. The installation has become unusable.

[Problems to be solved by the invention] The present invention has been made in order to eliminate the drawbacks of the prior art, and its technical problem is to reduce the height of the valve cover of the water control valve. .

B. Structure of the invention [Means for solving the problem] For this purpose, the present invention adopts the following structure (technical means). That is, the joint is connected to the perforation point of the fluid pipe, is watertightly attached to the outside of the fluid pipe via a saddle part, and has a valve box part for a working water control valve that stands up perpendicular to the saddle part. The water control valve is composed of a pipe part, a valve cover connected to and attached to the joint pipe part, and a water control valve body housed in the valve cover, and the valve cover of the water control valve is connected to the joint pipe part. The water control valve is composed of an outer cylindrical part that is connected in communication with the outer cylindrical part and has an open upper part, and an inner cylindrical part that is open at the lower part and closed at the upper part with an upper cover and is slidably fitted into the outer cylindrical part. The body is housed in the inner cylindrical part and is movable in the axial direction of the inner cylindrical part by rotation of a feed rod passing through the upper cover of the inner cylindrical part. T-shaped tube.

In the above configuration, the outer cylindrical part of the water control valve may be integrally connected to the joint pipe part, or it may be separated and freely attached to the joint pipe part. .

[Effect]

In use, first, attach the main split pipe from which the inner cylindrical part of the water control valve and the water control valve body have been removed to the water control valve installation position of the fluid pipe, then open the working valve, and attach the main split pipe from which the inner cylinder part of the water control valve and the water control valve body have been removed. A fluid pipe is perforated through a perforator installed in the pipe. The drilling machine is pulled up and removed, and the inner cylinder part containing the water control valve body is installed on the outer cylinder part.Then, the inner cylinder part is pushed into the outer cylinder part against the water pressure from the fluid pipe. The outer cylindrical part and the inner cylindrical part are fixed at this position. In this state, rotate the feed rod to push the water control valve body into the fluid pipe to shut off the flow in the fluid pipe.If necessary, to restart the flow in the fluid pipe, rotate the feed rod in the opposite direction to push the water control valve body into the fluid pipe. pull up.

By adopting this configuration, the feed rod inserted into the valve cover of the water control valve moves the valve body of the water control valve, which is screwed into the feed rod, the distance from above the working valve to the bottom of the fluid pipe. Compared to the conventional valve, which requires a length sufficient for the valve cover, the distance can be shortened, and the length (height) of the valve lid can be reduced.

That is, as shown in FIG. 3, for example, if the height of the valve cover (or the outer cylindrical part 31 and the inner cylindrical part 32) of the water control valve of the present invention is L, then the height of the valve cover of the conventional water control valve is The height is at least L+2, which results in a difference of 2. This is the amount of misalignment between the inner cylinder part and the outer cylinder part due to the protrusion (amount not inserted).

Therefore, the height of the valve cover of the water control valve of the present invention is 2 times lower than that of the conventional type, and the space occupied by the water control valve can be reduced.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the split pipe for non-water supply work of the present invention will be described below based on the drawings.

Figures 1 to 5 show the structure of an embodiment of a divided pipe for non-water supply work, Figure 1 is a longitudinal sectional front view showing its overall configuration, and Figures 2 to 5 show its operating procedure. FIG.

In the figure, P is an existing fluid pipe, and Q is a hole drilled in the fluid pipe P at a position where a water control valve is inserted and installed.

This divided pipe for non-water cutoff construction (hereinafter simply referred to as "divided pipe") includes a joint pipe section 1 and a water control valve 3 disposed above the joint pipe section 1. The split tube T also includes a working valve 2 that is detachably attached to the side of the connecting tube section 1.

The joint pipe section 1 includes a saddle section 11 placed watertightly along the outer periphery of the fluid pipe P, and a hollow cylindrical working valve that stands up perpendicularly to the saddle section 11 and constitutes a valve box of a working valve, which will be described later. It consists of a box part 12. 1' is a lower saddle, and the lower saddle 1' and the saddle part 11 have bolts and nuts 4 interposed between the flanges 1a and 1a' that face each other (or abut each other).
1, the connecting pipe part 1 becomes the fluid pipe P.
is fixed to the outer periphery of the It should be noted that, instead of using the lower saddle 1', it may be fixed using a U-shaped bolt or a chain, and the mode of this fixing is free.

The working valve 2 consists of a working valve box 21 and a working valve body 22. The working valve 2 is removably attached to the connecting pipe part 1 through the flange part 21a of the working valve box 21 with bolts 42 so as to communicate with the working valve box part 12 of the connecting pipe part 1. The working valve element 22 is brought into close contact with the valve seat of the valve body part 12 of the connecting pipe part 1 in the closed state (see, for example, FIGS. 2 and 3).

The water control valve 3 includes a valve cover including an outer cylinder part 31 and an inner cylinder part 32, and a water control valve body 33 housed in the valve cover.
including.

The outer cylinder part 31 has a cylindrical shape, is provided integrally with the upper part of the joint pipe part 1, that is, the upper part of the working valve box part 12, and has a flange 311 extending outward at the upper end. A bolt through hole 31a is bored in the flange 311. 312 is the inner surface of the outer cylindrical portion 31, and 313 is a stepped portion thereof.

The inner cylinder part 32 consists of a side cylinder part 321 with an open lower part and an upper cover 322 that closes the upper part of the side cylinder part 321, and is inserted into the outer cylinder part 31 in a nested manner. More specifically, the side cylinder part 321 of the inner cylinder part 32 has an outer diameter slightly smaller than the inner diameter of the inner surface 312 of the outer cylinder part 31, and has packing 92 inside the inner surface 312 of the outer cylinder part 31. It can be inserted and removed in a watertight manner. Further, when the lower end of the side cylinder part 321 contacts the step part 313 of the outer cylinder part 31, the outer edge (flange) of the upper lid 322 collides with the flange 311 of the outer cylinder part 31. Note that the outer cylinder 3 is attached to the flange of the upper lid 322.
A bolt through hole 32a corresponding to the bolt through hole 31a of the flange 311 of No. 1 is bored.

It is essential that the above-mentioned outer cylinder part 31 and inner cylinder part 32 constitute a so-called telescopic valve lid.
Therefore, the watertightness of the outer cylinder part 31 and the inner cylinder part 32, the formation of the stepped part 313 in the outer cylinder part 31, and the
2 and both flanges 31 abut against the stepped portion 313
Consistency with the contact of 1,312, etc. is not necessarily essential. That is, for example, before the tip of the inner cylindrical portion 32 comes into contact with the stepped portion 313, both flanges 311,
It is free to adopt a configuration in which 312 makes contact.

The water control valve body 33 is inserted into the fluid pipe P during or after construction to block the flow, and consists of a valve body 33A, a rubber plate 33B, and a feed rod 33C. 331 is a disc-shaped flange of the valve body 33A;
332 is a female thread. The feed rod 33C has a male thread 333 on its outer surface that is screwed into the female thread 332, and when the feed rod 33C rotates, the valve body 33
Slide A up and down. 334 is the collar of the feed rod, and 335 is a joint portion at the upper end of the feed rod. As shown in the figure, the feed rod 33C installed inside the inner cylinder part 32 is longer than the depth of the inner cylinder part 32, and therefore the water control valve body 33 is attached so as to protrude from the inner cylinder part 32. Become.

In order to fix the outer cylindrical part 31 and the inner cylindrical part 32 of the water control valve 3, bolts and nuts 5 are inserted into bolt through holes 31a and 32a formed in the flanges thereof and are tightened and fixed.

In addition, in the symbols shown in the figure, 7 is an assembly bolt/nut with a nut 71, 8 is a blind cover, 43 is a bolt for attaching the blind cover 8, 91, 9
2,93 is a watertight packing (O-ring).

Next, the drilling procedure and the water control valve insertion procedure using the split pipe T of the above-mentioned embodiment in a state where water is not cut off will be described.

In the diagram, the process progresses in the order of FIG. 2→FIG. 3→FIG. 4→FIG. 1→FIG. 5.

As shown in FIG. 2, the inner cylindrical portion 32 of the water control valve 3 and the water control valve body 33 are located at the water control valve installation position of the fluid pipe P.
Securely attach the split tube T from which the is removed via the lower saddle 1'. The working valve 2 may be attached to the connecting pipe portion 1 of the split pipe T in advance, or may be attached at the same time or immediately after this step.

A perforator 6 is attached to the upper part of the outer cylinder part 31 of the water control valve 3.

The working valve body 22 of the working valve 2 is opened, and a hole Q is bored in the fluid pipe P using the cutter 61 of the drilling machine 6. Fluid from the fluid pipe P during drilling operation fills the casing 62 of the drilling machine 6 and is discharged to the outside together with chips.

After drilling, the cutter 61 is pulled up above the position of the working valve 2, and then the working valve body 2 of the working valve 2 is removed.
2 (the state shown in FIG. 2), and then the punching machine 6 is removed.

The inner cylindrical part 32 of the water control valve 3 with the valve body 33A pulled up to the top and accommodated therein is inserted into the outer cylindrical part 31. At this time, the length of the valve body 33A is equal to the length of the outer cylinder portion 31.
Since this is larger than the depth of the inner cylindrical part 32, there will be a gap between the flanges of the outer cylindrical part 31 and the inner cylindrical part 32. Attach the bolts and nuts 7 for assembly (see Figure 3).

Next, the working valve body 22 of the working valve 2 is opened, and by first tightening the nut 71 of the assembly bolt/nut 7, the inner cylinder portion 32 housing the water control valve body 33 is lowered. Then, the tip of the water control valve body 33 is positioned immediately above the position of the perforation Q at the position where the flanges collide with each other (fourth
(see figure). In this state, the assembly bolts and nuts 7 are replaced with fixing bolts and nuts 5 as appropriate.

The water control valve 3 is assembled into the split pipe T by the above procedure, but if you want to cut off the flow in the fluid pipe P, the water control valve body 33 can be gradually moved by rotating the feed rod 33C. Go down and rubber plate 33B
passes through the perforation Q and enters the fluid pipe P, and the peripheral surface of the rubber plate 33B is pressed against the pipe wall of the fluid pipe P and the outer periphery of the perforation Q, so that the flow within the fluid pipe P is controlled by the water control valve 3. will be blocked (first
(see figure). After shutting off the flow, open the working valve 2 as required.
is removed, and the blind cover 8 is installed in its place with bolts 43 (see FIG. 5). Furthermore, if necessary, to restart the flow of the fluid pipe P, the feed rod 33C may be rotated in the opposite direction and the water control valve body 33 may be pulled up.

The present invention is not limited to the configuration of the embodiments described above, and various design changes can be made without departing from the basic technical idea of the present invention.

That is, in this embodiment, the outer cylindrical part 31 of the water control valve is molded to be integrally connected to the upper part of the joint pipe part 1, but the outer cylindrical part 31 may be screwed onto the joint pipe part 1 or via a flange. It is included in the technical idea of the present invention to adopt a mode in which the device is detachably installed (that is, the mode of the earlier application No. 174117/1983).

C. Effects of the invention Since the split-shaped pipe for non-water supply works of the present invention has a telescoping valve cover, the space occupied by the water control valve can be reduced, and the fluid pipe can be Even if the underground burial depth is shallow, the valve cover of the water control valve can be prevented from protruding above the ground as much as possible.

[Brief explanation of the drawing]

The drawings show an embodiment of a split pipe having a valve cover structure of a water control valve according to the present invention, and FIG. 1 is a longitudinal sectional front view thereof, and FIGS. 2 to 5 are drawings showing its operating procedure. P...Existing pipe, Q...Perforation, T...Split pipe, 1...
Joint pipe part, 11...Saddle part, 12...Valve box part, 2...
Work valve, 3... Water control valve, 31... Outer cylinder part, 32... Inner cylinder part, 332... Top cover, 33... Water control valve body, 33C... Feed rod.

Claims (1)

[Claims for Utility Model Registration] A device that communicates with the perforation Q of the fluid pipe P, is watertightly attached to the outside of the fluid pipe P via a saddle part 11, and stands perpendicular to the saddle part 11 for use in work. A water control valve consisting of a joint pipe part 1 having a valve box part 12 for the water control valve 2, a valve cover connected to and attached to the joint pipe part 1, and a water control valve body 33 housed in the valve cover. 3, the valve lid of the water control valve 3 is composed of an outer cylindrical part 31 that is connected to the joint pipe part 1 and has an open upper part, and an outer cylindrical part 31 that is open at the lower part and closed at the upper part with an upper cover 322. An inner cylinder part 32 is slidably fitted into an outer cylinder part 31, and the water control valve body 33 is housed in the inner cylinder part 32. 33C, which can be moved forward and backward in the axial direction of the inner cylindrical portion 32. A split-chop pipe for non-water cutoff construction.