JPH0134795Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is designed to prevent water from being stopped at any position in an existing water supply main, or when performing construction work to branch off a branch pipe from the water supply main. An auxiliary device that is installed at a branch location and used to carry out construction work without water interruption (conducting construction work with running water in the water supply main without stopping the flow of water with a pre-installed water control valve), so-called Concerning auxiliary equipment for uninterrupted water pipe construction.

The present applicant previously stated in Utility Application No. 19119-1988,
"A bottomed cylindrical shape that is installed perpendicular to a water supply main pipe, has an inner diameter larger than the outer diameter of the water supply pipe, is assembled by sandwiching the water supply main pipe watertightly, and has an open top. a perforated cylinder part, a branch pipe part communicating with the perforated cylinder part and arranged at a required angle with respect to the water supply main pipe, and a branch pipe part arranged in the perforation pipe part and communicating with at least the water supply main pipe. A vertical valve whose surface facing the downstream side has a plane perpendicular to the water supply main pipe, a horizontal valve disposed above the vertical valve in the perforated cylinder part to ensure water tightness with the opening, and a horizontal valve that slides into the water supply main pipe. A sliding sleeve that is freely fitted on the outside and inserted into the perforated tube from the downstream side of the water supply main pipe in a watertight manner to ensure watertightness on the abutting surface of the vertical valve. proposed a device.

To use this prior art device, first, the device from which the vertical valve and the horizontal valve have been removed is assembled and fixed to the main water supply pipe at the location where the branch pipe branches, and the branch pipe is arranged at the branch pipe section. Thereafter, the water supply main pipe is pierced and cut by a drilling machine via a working water control valve disposed at the upper end of the perforated cylinder. Next, after removing the drilling machine and cutting piece, insert the vertical valve near the cut part of the water supply main on the downstream side via the working water control valve, and insert the horizontal valve into the opening of the drilling cylinder. and fit tightly. Thereafter, the sliding sleeve is moved forward, and its tip is brought into contact with the downstream side surface of the vertical valve, thereby establishing watertightness between the vertical valve and the sliding sleeve. After that,
By removing the work water control valve, etc., all water pipe branching work using this device is completed.

According to the device of this prior art, only one side of the water supply main pipe is closed by the contact between the vertical valve and the sliding sleeve, so that the branch pipe section can be freely arranged. Although it has advantages such as being able to be used commonly for switching work, it also has some drawbacks.

In other words, the sliding sleeve is divided into two parts due to assembly, but the water seal member that comes into contact with the sliding sleeve is located at the joint (i.e., the joint) of the two halves of the sliding sleeve. A complete water sealing effect cannot be achieved, and water leaks from the joint. This point also applies to the type of water sealing device that presses a water sealing member against the inner wall of the perforated cylindrical portion (split into two) to stop water.

Therefore, in view of the above-mentioned circumstances, it is an object of the present invention to utilize the advantages of the above-mentioned prior art while eliminating its drawbacks, and to provide a new auxiliary device for uninterrupted water pipe construction that can be used for both water stoppage construction and branching construction. is a technical issue.

Therefore, the basic technical idea of the present invention is to achieve the above-mentioned technical problem by making the flow cutoff valve movable back and forth and directly sealing the end face of the cut portion of the water supply main pipe with water.

Specifically, the auxiliary device for uninterrupted water pipe work of the present invention has the following configuration (technical means). That is,
A bottomed cylindrical tube installed perpendicularly to a water supply main pipe, having an inner diameter larger than the outer diameter of the water supply main pipe, and assembled by watertightly clamping the water supply main pipe, and having an open top. a horizontal valve that watertightly closes an opening of the perforated cylinder; a valve stem that penetrates the horizontal valve in a watertight manner and is only rotatable; and a screw threaded portion of the valve stem. a vertically moving member that moves up and down along the valve stem by rotation of the valve stem, and has a cam portion on a radially outer end surface around the valve stem, and cam engages with the cam portion of the vertically moving member. , which moves forward and backward in the radial direction around the valve stem in conjunction with the vertical movement of the vertically movable member, and has a sealing member on its front surface that contacts and seals the perforated end surface of the water supply main pipe. It consists of a vertical valve.

Here, the horizontal valve, the valve stem, the vertically moving member, and the vertical valve constitute a flow cutoff valve.

The device of the present invention is used as follows. Assemble and fix this device from which the flow cutoff valve has been removed to the main water supply pipe at the location where the water is to be stopped or where the branch pipe is branched (in the case of installing a bypass pipe, there are two locations, upstream and downstream), and the branch pipe is installed at the branch pipe location. Arrange the pipe. Next, the water supply main pipe is perforated and cut by a perforator through a working water control valve disposed at the upper end of the perforated cylinder. Then, after removing the drilling machine and the cut piece, a flow cut-off valve with a vertical valve pulled in through the working water control valve is inserted into the gap of the cut part, and first, the horizontal valve is used to secure the water-tight connection with the drilling cylinder. Plan. After that, the valve insertion device and the working water control valve are removed, the valve stem of the flow cutoff valve is rotated to move the vertical valve forward, and the water seal member on the front side of the vertical valve is drilled on the downstream side of the water supply main. Stops water on the downstream side of the water supply main by coming into contact with the end face.

The device of the present invention has the following unique effects.

According to this device, since the cut portion of the water main pipe is directly sealed against the cut end face of the water main pipe on the downstream side, there is no seam, and the water sealing effect can be enhanced.

Since the vertical valve in this device can move forward and backward, it can be easily inserted even if the gap at the cutting part is narrow, and for this reason, it is possible to use the drilling cylinder and the drilling machine with the smallest possible diameter. It is possible to carry out construction economically.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show an embodiment of the auxiliary device for water stoppage work according to the present invention.

Here, P is a water main, and the water main P
The device S of the present invention is attached to the water stop part. Q
is a cut made by a drilling machine at the water stop point of the water supply main.

Reference numeral 1 denotes a perforated cylindrical portion having an opening 11 at its upper portion, and is divided into an upper perforated cylindrical portion 1a and a lower perforated cylindrical portion 1b with a horizontal plane containing the central axis O of the water supply main pipe P as a boundary. The upper perforated cylindrical part 1a and the lower perforated cylindrical part 1b are assembled together by welding or flange abutment with their end surfaces abutted, and are formed into an integral cylindrical body with an open top and a bottom bottom. Ru. The perforated cylindrical portion 1 has an inner diameter larger than the outer diameter of the main water supply pipe P, and is disposed perpendicular to the main water supply pipe P. In this embodiment, the lower perforated cylindrical portion 1b is formed to have a bottom and to be as short as possible. In other words, it is sufficient that the cutter of the punching machine described later has a minimum depth to cut the water supply main pipe P.

12 is a flange stretched outward from the upper end of the perforated cylinder part 1; 12a is a bolt through hole bored in the flange; 13 is a flange fixed to the upper inner circumferential surface of the perforated cylinder part 1, which will be described later. A contact plate 14 is the corresponding contact plate 13 on which the bottom packing of the horizontal valve of the flow cutoff valve comes into contact.
This is a screw hole formed at a required location in the circumferential direction of the cylindrical wall above the cylindrical wall.

Reference numeral 2 denotes an attached pipe section, which is formed to be connected to the perforated cylinder section 1, and has two semi-tubular members 21, an upper and a lower part.
(Upper semi-tubular member 21a, lower semi-tubular member 21b)
By bringing the end surfaces of these semi-tubular members into watertight contact with each other, the main water supply pipe P is held and the apparatus S is fixed to the main water supply pipe P. 2
Reference numeral 2 designates a joint port at the end in the tube axis direction of the attached pipe section 2, which is pressed by a socket part 22a, caulking 22b applied inside the socket part 22a, a push ring (split into two) 22c, and the push ring 22c. It consists of a rubber ring 22d (split into one piece and joined after installation) to make the attached pipe part 2 watertight. Note that if the attached pipe section 2 is fixed to the water supply main pipe P by welding or the like and can be made watertight by itself, the joint port 22 can be omitted.
Alternatively, the semi-tubular member 21 can be omitted and the area around the main water supply pipe of the perforated cylinder portion 1 can be made watertight using only the joint opening.

V is a flow cutoff valve that is removably fitted into the perforated cylindrical portion 1, and includes a horizontal valve 3, vertical and horizontal movement regulating members 4 and 5 fixed to the lower surface of the horizontal valve 3, and the horizontal valve 3. The main components are a valve stem 6 that passes through the valve stem, a vertically moving member 7 that moves up and down as the valve stem 6 rotates, and a movable vertical valve 8 that moves in conjunction with the vertically moving member 7.

The horizontal valve 3 is fitted into the opening 11 of the perforated cylinder part 1, and the packing 3 is attached to the peripheral edge of the lower surface of the horizontal valve 3.
1 is brought into contact with the abutment plate 13 to seal the opening 11 of the perforated cylinder portion 1 watertightly. The packing 31 can also be mounted around the horizontal valve 3 and pressed directly against the inner wall of the opening 11 of the perforated cylinder part 1.

Reference numeral 32 denotes a protruding member formed at the center of the horizontal valve 3. The valve stem 6 is inserted into the inner hole 33 of the protruding member 32, and a packing (O-ring) 34 arranged facing the internal light 33 is used to open the valve. Aim for watertightness with rod 6. Reference numeral 35 denotes a retaining member which is fixed on the upper part of the protruding member 31 and prevents the valve stem 6 from being pulled out. The retaining member 35
A screw 35a is formed on the outer periphery of the valve 35a, and is connected to a valve insertion device to be described later through an adapter T.

The vertical movement regulating member 4 is arranged along the valve stem 6,
The movement of the vertically movable member 7 is restricted (or guided). 41 is a guide wall arranged parallel to the vertical movement regulating member 4, and 42 is a guide groove bored in the front wall 43. The vertical movement regulating member 4 is fixed to the lower surface of the horizontal valve 3 using appropriate fixing means such as bolts 44, but it can also be integrated into the horizontal valve 3 by welding.

The horizontal movement regulating member 5 is fixedly fixed to the horizontal valve 3 in a watertight manner, and regulates (or guides) the movement of the vertical valve 8.

The valve stem 6 is inserted into the inner hole 33 of the horizontal valve 3 watertightly and rotatably, and has a threaded portion 61 at its lower part. Reference numeral 62 is a collar formed on the upper part of the valve stem, and prevents the valve stem from being pulled out by colliding with the retaining member 35 of the horizontal valve 3. Reference numeral 63 is a mounting portion for a rotating handle (not shown) formed at the upper end of the valve stem, and the rotating handle is fitted into the mounting portion 63 to rotate the valve stem 6.

The vertically movable member 7 includes a main body 7A, a screw top 71, and a reaction plate 72.

The screw top 71 is screwed into the threaded portion 61 of the valve stem 6,
Since its side surface is restrained by the guide wall 41 of the vertical movement regulating member 4, it can only move up and down, and its upper and lower surfaces collide with the arm 73 at the rear of the main body 7A to prevent the main body 7A from moving up and down. introduce. The side surface of the arm portion 73 is also guided by the guide wall 41 to smoothly move the main body 7A up and down. Vertical movement member 7
The vertical movement range of is determined by the length of the threaded portion 61 of the valve stem 6 and the length of the guide groove 42 of the vertical movement regulating member 4.

When the vertically movable member 7 receives a force toward the vertical valve 8 (that is, when the vertical valve 8 is pulled), the reaction plate 72 collides with the guide wall 41 of the vertical movement regulating member 4 and provides a reaction force. Note that when the vertically movable member 7 receives a force toward the valve stem 6 (that is, when pushing out the vertical valve 8), the back surface portion 74 of the main body 7A collides with the front wall 43 of the vertical movement regulating member 4 to generate a reaction force. give.

A T-shaped groove 75 is formed on the front surface (in the direction away from the valve stem) of the main body 7A of the vertically moving member 7, and the inner surface thereof is formed into an inclined surface (cam surface) 75a that approaches the valve stem as it goes downward. be done. 75b is T
This is an engagement protrusion of the letter-shaped groove 75.

The vertical valve 8 consists of a valve body 8A, a water seal member (packing) 8B, and a cam member 8C.

The front surface of the valve body 8A of the vertical valve 8 is formed into a cylindrical curved surface (in other words, a curved surface that matches the curved surface of the cutter of the drilling machine), and the upper wall 81 thereof has a sliding groove that engages with the horizontal movement regulating member 5. 81a is formed.

The packing 8B is installed in a groove 82 formed in the front surface of the valve body 8A, and is pressed against the cut end surface of the water supply main pipe P.

The cam member 8C of the vertical valve 8 has its front portion (in the direction away from the valve stem) fixed to the back surface of the valve body 8A, and is arranged in correspondence with the vertically movable member 7. The rear part of the cam member 8C (in the direction approaching the valve stem) is formed into a T-shaped protrusion 83, and is loosely fitted into the T-shaped groove 75 of the vertically movable member 7. The outer surface 83a of the protrusion 83 is formed into a cam surface that matches the cam surface 74a of the vertically movable member 7. 83b is an engagement protrusion that engages with the engagement protrusion 75b of the groove 75 of the vertically movable member 7.

Thus, the vertically movable member 7 and the vertical valve 8 are cam-engaged through the T-shaped groove 75 and the projection 83. That is, when the vertically movable member 7 descends in the A direction (see FIG. 1), the cam surface 75a of the vertically movable member 7 and the vertical valve 8
The vertical valve 8 is moved forward in the A direction (A) by a wedge action due to the cam connection with the cam surface 83a. Further, when the vertically movable member 7 rises in the C direction (same), the engaging protrusion 75b of the vertically movable member 7 and the engaging protrusion 83b of the vertical valve 8 are cam-connected, and the vertical valve 8 moves in the two directions (same). be forced to retreat.

Reference numeral 9 denotes a locking bolt that is screwed into the screw hole 14 of the perforated cylindrical portion 1. The locking bolt 9 rotates its tip back when the flow cutoff valve V is inserted into the perforated cylinder 1, and then rotates its tip when the flow cutoff valve V is installed in a predetermined position. The flow cutoff valve V is fixed by moving forward and engaging the upper edge of the horizontal valve 3 of the flow cutoff valve V.

Next, the procedure for installing the device of this embodiment to the main water supply pipe P without water interruption will be described.

At the water stop position of the main water supply pipe P, the present apparatus S from which the flow cutoff valve V has been removed is attached watertightly around the main water supply pipe P by abutting and joining the upper and lower halves of the apparatus S to each other.

A flange 12 is attached to the upper part of the perforated cylinder part 1 of this device S.
Water-tightly install the water control valve H for uninterrupted water work and the drilling machine I through the (see Fig. 5).

Open the working water control valve H, insert the cutter J of the drilling machine I into the drilling tube 1, and cut the water supply main pipe P.

The cutter J holding the cut piece of the water supply main is pulled up to a position above the working water control valve H, and the drilling machine I is removed with the water control valve H closed.

A valve insertion device K in which a flow cutoff valve V is detachably attached via an adapter T is watertightly attached onto the working water control valve H, and the vertical valve 8 of the flow cutoff valve V is drawn toward the valve stem 6 side to control the water. Open the valve H so that the vertical valve 8 of the flow cut-off valve V is inserted into the gap of the cutting part Q, and open the flow cut-off valve V until the horizontal valve 3 hits the abutment plate 13 of the perforated tube part. Press down. Next, a locking bolt 9 penetrating through the cylinder wall of the perforated cylinder part 1 is made to protrude from the upper end of the horizontal valve 3 to prevent the flow cutoff valve V from being pushed back by water pressure (see Fig. 6). .

The flow cutoff valve V and the valve insertion device K are disengaged, and the valve insertion device K and the working water control valve H are removed.

A handle (not shown) is fitted into the mounting portion 63 at the upper end of the valve stem 6, and by operating the handle, the valve stem 6 is rotated, and the vertical valve 8 is directed toward the cut end of the water supply main where water is to be shut off. advance.

The packing 8B on the front side of the vertical valve 8 is brought into close contact with the cut end surface of the water supply main pipe to stop the flow of water to the downstream side of the water supply main pipe 4.

Further, when it is necessary to restart the flow, or when the downstream water supply main pipe has been appropriately cut and removed and the water has been completely shut off, the flow cutoff valve V is removed using the following procedure.

That is, by rotating the valve stem 6 in the opposite direction,
The vertical valve 8 is pulled away from the cut end face against the fluid pressure and drawn toward the valve stem 6. After that, a working valve H and an insertion machine K are installed on the upper part of the perforated cylinder part 1, and after the insertion machine K and the flow cutoff valve V are connected, the locking bolt 9 is retracted. Next, after taking out the flow cutoff valve V to the outside of the working valve H, a horizontal valve (not shown) for permanent installation is attached to the insertion machine K, and inserted into the perforated cylinder part 1 in the manner described above, and locked. Fix with bolt 9. Then, the insertion machine K and the working valve H are removed, and a blind cover (not shown) is fixed on the perforated cylinder part 1 via the flange 12, and the horizontal valve is further firmly fixed via the blind cover.

In the above example, we talked about water stoppage construction, but
In the branching work, there is no essential difference from the above-mentioned water stoppage work except that the branch pipe part is placed in the perforated cylinder part.

That is, the branch pipe section 15 communicates with the perforated cylinder part 1, is perpendicular to the perforated cylinder part 1 and the water supply main pipe P, and is arranged to branch in one direction, and has a flange 16 at the end. The branch pipe section 15, like the perforated cylinder section 1, is formed by being divided into upper and lower parts with respect to a plane passing through the central axis O of the water supply main pipe P, and the end surfaces thereof are integrated by welding or flange joining. .

A branch pipe R is disposed in the branch pipe section 15 via a flange 16, and a water control valve (especially a spiral valve is often used) is attached to the flange 16, and a water control valve (particularly a spiral valve is often used) is attached to the flange 16. may be arranged. Moreover, it is of course possible to form it on the socket instead of the flange 16.

In branch construction, water flows into branch pipe R via branch pipe section 15 at the same time as the drilling machine cuts the hole. However, when a water control valve is connected to branch pipe section 15, The water control valve can be opened to allow water to flow into the branch pipe R connected beyond it.

The present invention is not limited to the embodiments described above, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.

The cam engagement between the vertically movable member and the vertical valve is formed by a T-shaped protrusion on the vertically movable member side and a T-shaped groove on the vertical valve side.

The valve stem is placed eccentrically from the center of the horizontal valve to the side opposite to the side where the vertical valve is installed. This embodiment allows the vertical valve to be inserted into narrower cut gaps.

[Brief explanation of drawings]

The drawing shows the auxiliary device S for uninterrupted water pipe work of this invention.
Fig. 1 is a longitudinal sectional front view with the device S installed in the water stop position, Fig. 2 is a side view cut along the line X-X in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line Y-- 4 is a perspective view of a vertically movable member of a flow cutoff valve used in this device, and FIGS. 5 and 6 are process explanatory views. P...Water supply main pipe, Q...Cutting part, S...Auxiliary device for uninterrupted water pipe work, 1...Perforated cylinder part, 11...
...opening, V...flow isolation valve, 3...horizontal valve,
4, 5...Movement regulating member, 6...Valve stem, 7...Vertical movement member, 8...Vertical valve.

Claims (1)

[Scope of Claim for Utility Model Registration] Installed orthogonally to a water supply main, has an inner diameter larger than the outer diameter of the water supply main, and is assembled by clamping the water supply main in a watertight manner, and a perforated cylinder portion with a bottom and an open top; a horizontal valve that watertightly closes the opening of the perforated cylinder portion; a valve stem that penetrates the horizontal valve in a watertight manner and is only rotatable; and the valve. a vertically moving member that is screwed into a threaded portion of a rod and moves up and down along the valve stem as the valve stem rotates, and has a cam portion on an outer end surface in a radial direction with the valve stem as the center; The cam engages with the cam part of the vertically moving member, and moves forward and backward in the radial direction around the valve stem in conjunction with the vertical movement of the vertically moving member. An auxiliary device for uninterrupted water supply pipe work, comprising: a vertical valve having a sealing member that does so;