JPS634859Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a water control valve that is inserted into an existing fluid pipe without water interruption (that is, with pressure applied), that is, a water control valve that is inserted without water interruption. More specifically, the present invention relates to the structure of a valve body when the existing fluid pipe is used as a valve box of a non-interruptible insertion water control valve.

In addition, "uninterrupted water supply" is not limited to water only, but is a general term for carrying out construction under conditions where gas and liquid flow without stopping the flow with a pre-installed stopper (main stopper). means.

[Prior art]

In Utility Application No. 56-138272, the present applicant previously perforated an existing fluid pipe with no water cutoff, inserted a water control valve body into the perforated part of the existing fluid pipe, and inserted the water control valve body into the existing fluid pipe. We proposed a so-called uninterrupted insertion water control valve device that shuts off water by pressing against the inner wall of a fluid pipe.

Figure 1 shows its structure. Here, P is the existing fluid pipe, Q is the hole drilled at the position where the water control valve of the fluid pipe P is attached, 1 is the split T-shaped pipe, 2 is the fixed flange ring, 3 is the bolt, and V is the Valve lid 4,
This is a water control valve consisting of a valve stem 5 and a valve body 6. Valve body 6
consists of a valve body 6A and a rubber body 6B, and the valve body 6A
is screwed into the threaded portion 51 of the valve stem 5, and is moved up and down along the valve stem 5 by forward and reverse rotation of the valve stem 5. Further, the rubber body 6B is sandwiched between two plate bodies 61 (indicated by dotted lines) that form part of the valve body 6A and are disposed oppositely on the upstream and downstream sides.

According to this, since it is used as the valve box of the water control valve V into which the existing fluid pipe P is inserted and installed, there is no need to prepare a new valve box, which saves materials, and since the perforation cross section is small, the drilling work In addition to having the advantage of improved performance, since the valve stem 5 can be inserted into the recess 62 at the center of the upper part of the rubber body 6B with a required gap, the height of the valve cover 4 can be lowered. This has the advantage that the water control valve V itself can be made smaller, and it has been increasingly used in recent years.

However, on the other hand, since the lower part of the inner wall of the existing fluid pipe P directly becomes the valve seat, the valve body and valve seat do not fit well and there is a problem with water-stopping properties. A rubber body is used, and it is necessary to forcefully press this rubber body against the inner wall of the fluid tube. As a result, the installed water control valve has to be operated by strongly tightening the valve stem which is interlocked with the valve body in order to shut off the water.

Then, as a result of the rubber body being strongly compressed, the rubber body buckles and bulges into the recess 62, causing water leakage to occur in the inner wall portion of the existing pipe P at its horizontal maximum diameter, resulting in the expected It turns out that there are cases where the objective cannot be achieved.

[Purpose of this invention]

The present invention was developed in view of the above-mentioned circumstances, and the concave portion does not buckle even if the rubber body is strongly compressed.
Therefore, the technical challenge is to take measures to prevent water leakage from occurring in the inner wall portion of the existing pipe P with its maximum horizontal diameter.

[Summary of the invention]

The valve body structure of the uninterrupted water insertion water control valve of the present invention adopts the following configuration (technical means) in order to achieve the above technical problem. That is, the water control valve has a valve body that is moved up and down by the rotation of a non-rising valve stem,
A rubber body that is interposed between opposing plates disposed facing each other on the upstream and downstream sides, has a valve stem accommodating hole, and bulges at the side edge part due to compression and comes into pressure contact with the valve seat. It is characterized by a mandrel placed in the middle of the hole.

[Effects of this invention]

By employing the above configuration, the present invention has the following unique effects.

When this water control valve is closed, the rubber body does not bulge into the valve stem accommodation hole, and the compressive force applied to the rubber body acts on the bulge in the lateral direction, against the inner wall surface of the fluid pipe. Has a good water-stopping effect.

The mandrel increases the rigidity of the rubber body, maintains the diameter of the valve stem receiving hole over a long period of time, and allows the valve stem to move in and out smoothly.

[Example of the present invention]

An embodiment of the present invention is shown in FIGS. 2 to 8.

Here, P is an existing fluid pipe, and Q is a hole drilled in the fluid pipe P.

Reference numeral 1 denotes a split T-shaped tube, which consists of a trunk-like tube section 11 and a branch tube section 12. The body-shaped tube part 11 is formed in two parts, and the flanges 11a facing each other are tightened with fasteners 11b such as bolts and nuts, and the inner surface of the body-shaped tube part 11 is pressed and fixed against the outer surface of the fluid pipe P. The branch pipe portion 12 communicates with the perforation Q, and a flange 13 is provided at its upper end. 13a is a bolt hole for mounting a water control valve (valve lid) for non-interruption insertion, 13
b is a bolt hole for mounting a working valve.

2 is a mounting bolt/nut.

V is the uninterrupted insertion water control valve of the present invention, which consists of the main parts of a valve cover 3, a valve stem 4, and a valve body 6.

The valve cover 3 is divided into the lower part and is attached to the flange 13 of the T-shaped pipe 1.
It has a flange 31 that abuts against the mounting bolts and
It is attached onto the split T-tube 1 with a nut 2. 32 is a valve stem insertion hole bored at the top of the valve cover 3, and 33 is a valve stem press plate.

The valve stem 4 rotatably penetrates the valve stem insertion hole 32 of the valve cover 3 and is attached so as to protrude inside the valve cover 3. Reference numeral 41 denotes a collar stretched over the top of the valve stem 4, which is clamped by the valve stem presser plate 33 at the top of the valve cover 3 to prevent the valve stem 4 from being pulled out. However,
The valve stem 3 can rotate freely but does not move up and down. 4
Reference numeral 2 denotes a threaded portion extending over substantially the entire length of the valve stem 4. Reference numeral 43 designates a mounting portion for a rotation handle (not shown) formed at the upper end of the valve stem 4.

5 is an O-ring that maintains watertightness between the valve cover 3 and the valve stem 4.

The valve body 6 consists of a valve body 6A made of metal and a rubber body 6B made of an elastic body.

A female threaded hole 61 is screwed into the top of the valve body 6A, into which the threaded portion 42 of the valve stem 4 is screwed. As the valve stem 4 rotates, the guide protrusion H formed on the valve body 6A is engaged with the guide groove I formed on the inner surface of the valve cover 3 and the inner surface of the branch pipe portion 12, so that the valve body 6A will move up and down.

Reference numeral 62 is a cover formed near the top of the valve body 6A, and the cover 62 has a diameter larger than the diameter of the perforation Q. Reference numeral 63 denotes two opposing plates connected to the cover 62 and disposed oppositely on the upstream and downstream sides. The length is slightly shorter than the length at which it collides with the inner surface of the existing pipe P when seated on the upper surface of the pipe P.

The rubber body 6B is attached to the lower part of the valve body 6A, and has a U-shape that is sandwiched (but slidable) between a ring part 64 and two opposing plates 63 arranged on the lower surface of the cover 62 of the valve body 6A. It consists of a vertical plate body part 65. When the cover 62 is seated on the outer surface of the perforation Q of the existing pipe P, the ring portion 64 of the rubber body closes the cover 62.
2 and the outer surface of the existing pipe P to ensure watertightness between the two.

In addition, the vertical plate portion 65 of the rubber body is in a natural state (that is, in an uncompressed state), and its width is made slightly smaller than the diameter of the perforation Q so that it can be freely inserted into the perforation Q, and its height is the same as that of the existing one. It is made sufficiently longer than the diameter of the pipe P. When the cover 62 of the valve body 6A is seated on the upper surface of the perforation Q, the vertical plate portion 65 is compressed and expands in the width direction, and its side edges are pressed against the inner surface of the existing pipe P to form a watertight seal. .

Reference numeral 66 is a valve stem receiving hole formed in the center of the rubber body 6B in the vertical direction, and when the valve body 6 is pulled up into the valve cover 3, the valve stem 4 is accommodated in the valve stem 4 in its length direction. Pull it all the way.

Reference numeral 7 denotes a metal core fitted into the valve stem receiving hole 66, which is usually made of metal (preferably stainless steel or gunmetal), but one made of hard synthetic resin is also used. The mandrel 7 is installed at a position corresponding to the horizontal maximum diameter of the existing pipe P when the rubber body 6B is compressed and inserted into the existing pipe. The inner hole 71 of the mandrel 7 has a diameter sufficient for the valve rod 4 to pass through.

An example of the dimensional relationship between the widths a, b and height c of the mandrel 7 and the valve body 6A and the rubber body 6B is shown in FIGS. 6 to 8. The height c of the mandrel 7 is 1/3 to 1/3 of the length of the valve stem accommodation hole 66 in anticipation of compression of the rubber body.
It will be reduced to 1/5.

The installation procedure of the water control valve V of the above-mentioned embodiment is performed as follows.

A split T-shaped pipe 1 is installed in a watertight manner at the water control valve installation position of the fluid pipe P.

After installing a work valve (not shown) watertightly on the flange 13 of the split T-shaped pipe 1 and installing a perforator (not shown) on the work valve, the work valve is opened to perform drilling. A hole Q is bored in the fluid pipe P using the cutter of the machine.

After pulling up the cutter of the drilling machine, close the work valve and remove the drilling machine.

After installing a water control valve insertion machine (not shown) on which the water control valve V of this embodiment is mounted on the work valve, the work valve is closed and the water control valve V is pushed down by the insertion machine to control the water control valve. The flange 31 of the valve lid 3 of the water valve V is brought into contact with the flange 13 of the split T-shaped pipe 2, and the bolt insertion holes 13a and 31a of both are aligned and fixed with the mounting bolts 2.

Remove the inserter and work valve.

Next, the operation of the water control valve V according to the embodiment of the present invention will be explained.

When blocking the flow of fluid in the fluid pipe P,
Attachment portion 43 of the valve stem 4 protruding from the top of the valve cover 3
Attach a rotating handle (not shown) to the valve stem 4.
When the valve body 6 is rotated, the valve body 6 is guided by the guide protrusion H and the guide groove I and descends while maintaining its position.

Since the vertical plate portion 65 of the rubber body 6B has a width smaller than the diameter of the perforation Q in its natural state, the vertical plate portion 65 of the rubber body enters into the fluid pipe P (see FIG. 4). The lower end of the vertical plate body portion 65 is the fluid pipe P
After colliding with the lower surface of the inner wall, when the rubber body 6B is further pressed, the vertical plate body portion 65 of the rubber body is separated from the front and back.
Since it is sandwiched between two facing plate bodies 63 (that is, upstream and downstream sides), it bulges in the lateral direction, and the vertical plate body part 6
5 and the inner wall of the fluid pipe P gradually become watertight.

When the lower surface of the cover 62 of the valve body 6 is seated on the outer periphery of the perforation Q via the ring portion 64 of the rubber body 6B, the rubber body 6B is compressed to the maximum and completely blocks the flow within the fluid pipe P. At this time, since the mandrel 7 fitted into the valve stem housing hole 66 is located at a portion corresponding to the horizontal maximum diameter of the existing fluid pipe P, the rubber body does not bulge into the valve stem housing hole 66 at that portion. , the pressure contact with the inner wall surface of the fluid pipe P is achieved well (see FIG. 5).

[Modified example]

This discussion is not limited to the above-mentioned embodiments, and it is possible to change the design within the scope of the basic technical idea of this study.

The split T-shaped pipe 1 and the water control valve V are joined by a flange joint in this embodiment, but the socket joint (between the socket part and the inlet part) as disclosed in Utility Application No. 13338272, filed earlier by the present applicant, is used. (fitting joint).

As shown in FIG. 9, the outer side of the mandrel 7 is turned toward the rubber body to form a bulged portion 7a. According to this aspect, when the rubber body is compressed, the bulging portion 7a bulges out well toward the side surface, thereby promoting watertightness with the inner wall of the fluid pipe.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the structure of a conventional uninterrupted insertion water control valve. Figure 2 and subsequent figures show an embodiment of the valve body structure of the non-stop water insertion water control valve of the present invention. Figure 2 is a longitudinal cross-sectional view of one embodiment, and Figure 3 is the -
Figure 4 is a cross-sectional view of this water control valve during the valve closing operation, Figure 5 is a cross-sectional view when the valve is closed, Figure 6 A and B are the front view of the valve body of the valve body. Figure and side view, No. 7
Figures A and B are front and side views of the rubber body of the valve body, Figures 8 A and B are plan views and side views of the mandrel, and Figures 9 A and B are plan views showing other aspects of the mandrel. and a side view. V... Uninterrupted water insertion water control valve, 4... Valve stem, 6...
Valve body, 6B...Rubber body, 63...Opposing plate, 66...
...Valve stem accommodation hole, 7... Core metal.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A water control valve having a valve body 6 that is moved up and down by the rotation of a non-rising valve stem 4, which is provided between opposing plates 63 disposed facing each other on the upstream and downstream sides. It is interposed and has a valve stem accommodation hole 66,
A non-water-interruption insertion water control valve characterized in that a rubber body 6B that bulges at the side edge due to compression and comes into pressure contact with the valve seat has a mandrel 7 disposed at an intermediate position of the valve stem receiving hole 66. Valve body structure. 2 The height of the mandrel 7 is 1/3 of the length of the valve stem accommodation hole 66
The valve body structure of a water control valve with continuous water insertion according to claim 1, the scope of which is reduced to 1/5. 3. The valve body structure of a non-water-interruption insertion water control valve according to claim 1 or 2, wherein the outer side of the mandrel 7 is bulged 7a toward the outer side of the rubber body.