JPS6056953B2 - Plug device for continuous water stop construction - Google Patents

Description

[Detailed Description of the Invention] This invention provides a water shutoff valve (plug) that can be used without interruption of water supply in a fluid pipeline.
A device that performs water shutoff work, i.e., a plug for uninterrupted water shutoff construction.
Regarding the device, it is an object to provide a stopper device for non-stop water stoppage work that is easy to handle and suitable for use in a stopcock insertion portion having a hole with a diameter smaller than the inner diameter of a fluid pipe.

When performing piping changes in fluid pipelines (for example, pipe renewal, removal work, or work to branch off branch pipes from the main pipe) or work to install valves or meters in the middle of piping,
It is necessary to temporarily interrupt the flow of the fluid line.

At that time, inserting stop valves at upstream and downstream locations as close to the construction location as possible without tightening the main valve has been traditionally performed as an uninterrupted water pipe construction method, and for this reason. Some devices have been developed (for example,
Special Publication No. 40-20474, Special Publication No. 51-336, Special Publication No. 55-44276, or Japanese Patent Application Publication No. 50-261
(Technology described in Publication No. 18). However, these conventional techniques have the following problems.

1. When cutting the water-stopping section of the pipe using a drilling machine that is larger than the pipe diameter, the strength of the pipe decreases, so materials are unnecessarily consumed in order to give the saddle (or split J-shaped pipe) a reinforcing function. .

2 Even when drilling with a drilling machine that has the same diameter as the pipe's inner diameter, a stopcock that matches the pipe's inner diameter is used, so if the pipe diameter is different, the stopcock must be changed accordingly, increasing versatility. Poor. 3 Inserting a stop valve requires complicated operations during the construction work, and in conventional models, the stop valve and the stop valve insertion device are separate, making it difficult to install the stop valve and remove it after installation. etc. The work requires time and effort.

and so on. In view of the above-mentioned circumstances, the present invention provides a novel water shutoff valve device for water shutoff construction, which solves all the problems of the prior art at once.

Therefore, the present invention adopts a configuration that satisfies the following requirements. In other words, 1. The water stop valve must be inserted into a water stop part that has a hole drilled below the inner diameter of the pipe, and 2. The water stop valve main body is smaller than the inner diameter of the pipe, but the water stop valve must be inserted into the water stop part that has a hole drilled below the inner diameter of the pipe, but the water stop valve must be inserted into the water stop part with a hole drilled below the inner diameter of the pipe. The elastic body attached to the stop valve expands beyond the inner diameter of the pipe (without restraint) and seals the inside of the pipe, that is, the stop valve main body has an expansion mechanism for the elastic body; 3. In order to measure insertion and expansion, it must have a mechanism that performs both in conjunction. In addition, it is also required that the device be operated in a watertight manner. In the present invention, 1. Uninterrupted water supply is not limited to only water, but is a general term for construction work being carried out under pressure without stopping the flow of gas and liquid fluids at the main valve. .

Therefore, in order to satisfy the above-mentioned requirements, the plug device for non-stop water stop work of the present invention adopts the following configuration.

That is, there is a stopper device for continuous water stoppage work that has a stopcock inserted into the inside of the pipe through a hole drilled below the inner diameter of the pipe to be water cut off, and one stopcock has a stopcock that is connected to the stopper body. and a sealing rubber plate that is U-shaped and slidably arranged surrounding the center wall of the stopper body, 2. The stopper body is attached to the lower end of the feed rod, and the feed rod is attached to the upper end of the feed rod. It can be inserted freely into the hollow part of the shaft that has the handle by threading. 3. The sealing rubber plate is attached to the lower ends of two expansion rods arranged in parallel with the feed rod in between, and the expansion rods have an expansion handle and are in a threaded relationship with the shaft. The four canishings are removably attached to the expansion rod pressing member, the lower end of which is open, the water stop valve is accommodated in such a way as to be freely removable, the upper end is watertightly covered with a lid, and the shaft is rotatably fixed by the lid. The expansion rod is slidably inserted therethrough. Since the plug device for non-stop water stop work of the present invention has the above-mentioned configuration, it has the following unique functions and effects. A hole smaller than the inner diameter of one fluid pipe can be drilled, so a decrease in the strength of the fluid pipe can be suppressed as much as possible, and economical water stoppage work can be performed without interruption.

Since the two feed rods are housed in the hollow portion of the shaft, the height of the feed mechanism can be made as low as possible, and the overall device can be made smaller.

3. The sealing rubber plate is arranged in a U-shape surrounding the center wall of the stopper body, and by pressing down its upper end with two expansion rods, the expansion action towards the sides is increased and the sealing rubber plate is placed on the inner wall of the fluid pipe. Strong adhesion and excellent water-stopping effect.

The degree of sealing of the stop valve can be adjusted by expanding the 4-comb plate.

5. In this device, the feeding mechanism and the expansion mechanism work in conjunction with each other, so that a series of stopcock insertion operations can be performed efficiently by simply rotating the feeding handle and the expansion handle.

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 7.

This device has the following configuration.

(The explanation will be centered on Fig. 1. Hereinafter, 1 upper refers to the direction farthest from the vibrator P, and 1 lower refers to the direction closer to the vibrator P.) A is a stop valve; It consists of a main body 1 and a sealing rubber plate 2.

The stopper body 1 forms a housing, and a rubber plate 2 is slidably housed in the housing. Reference numeral 11 indicates the central wall of the stopper body, 12 indicates the side wall, 13 indicates the flange, and 14 indicates the upper projecting portion.A comb ring 15 is attached to the periphery of the lower surface of the flange 13.

The sealing rubber plate 2 has a U-shape, and a comb plate mounting fitting 21 is fixed to the upper end thereof.

Reference numeral 3 denotes a casing, which includes an outer cylinder 31, a flange 32, and a lid 33.

The lid 33 consists of an upper lid 331 and a lower lid 332, which sandwich the lower part of the shaft 4 and rotatably support the shaft.
Both the upper cover and the lower cover are fixed to the outer cylinder 31 and do not move. 333 is a rod insertion hole bored in the lid 3.

4 is a shaft, a feed handle H is attached to the upper part, and a collar 41 at the lower part is connected to the upper lid 33 of the casing as described above.
1 and the lower lid 332, it is allowed to rotate freely but its vertical movement is restricted, and it stands on the lid 33.

A screw 42 is formed on the inner periphery of the lower part of the shaft 4, and a screw 42 is provided on the outer periphery of the lower part of the shaft over a required length.
3 is engraved. In addition, the shaft 4 and the lid 33 are
It is made watertight by a ring (not shown). Reference numeral 5 denotes a feed rod, which is inserted into the hollow portion of the shaft 4 so as to be accommodated therein, and its lower end is fixed to the stopper body 1.

A screw 51 is threaded onto the feed rod 5 over a sufficient length, and the screw 51 and the thread 42 of the shaft are in a threaded relationship. 6 is an expansion rod, the upper expansion rod 6
1. It consists of a relay disk 62 and a lower expansion rod 63, which are fixed to each other.

The upper expansion rod 61 is inserted into the rod insertion hole 333 of the casing lid 33 so as to be slidable up and down, and is fitted with an O ring (
(not shown) to make it watertight. The lower expansion rod 63 passes through the upper overhang of the stopper body 1 and is fixed to the fitting 21 of the rubber plate 2. The upper expansion rod 61 is vertically slidable on the casing lid 33 (see FIG. 2), and the lower expansion rod 63 is vertically slidable on the stopper body 1 (see FIG. 3). A spring 7 is fitted around the lower expansion rod 63, and its upper end is fixed to the lower surface of the relay disc 62, and its lower end is fixed to the upper end of the overhanging part 14 of the plug body 1. is biased in a direction that separates them from each other.

Reference numeral 8 denotes an expansion rod pressing member (see Fig. 2), and an expansion nut 8 to which an expansion handle h is attached and can be freely removed.
1 and an expansion ring 82.

The expansion nut 81 has a thread carved on its inner periphery to engage with the screw 43 of the shaft 4, and the expansion ring 82
The upper expansion connector 61 is loosely fitted into the bottom of the overhang 821.
The projection 611 on the upper end of is fitted. The expansion nut 81 and the expansion ring 82 collide with each other so as to freely rotate, and have the function of transmitting only the downward force of the rotational pressure of the expansion nut 81 by the expansion handle h to the expansion rod 6 via the expansion ring 82. do. Reference numeral 9 denotes a plug provided on the outer cylinder 31, which is connected to a similar plug 9'' provided on the split tube S via a hose (not shown) to adjust the water pressure.

The features of this device described above include a mechanism that feeds the water stop valve A to the water stop part (this is referred to as feeding mechanism B), and a mechanism that feeds the water stop valve A to the water stop part (this is referred to as feeding mechanism B), and a rubber plate 2 that feeds the water stop valve A from the main body 1 of the water stop valve A to the rubber plate 2 at the water stop part. It consists of two systems: a mechanism that slides and expands (this will be referred to as expansion mechanism C).

That is, the feeding mechanism B is a system composed of the handle H1 shaft 4, the feeding rod 5, and the stopper body 1, and the expansion mechanism C is a system composed of the handle H1 pressing member 8, the expansion rod 6, and the rubber plate 2. It is. Both mechanisms work together by sharing the shaft 4 and the lid 33 of the casing, and function appropriately. Next, the procedure for using this device will be described.

1. Attach the split pipe S watertightly to the fluid pipe P at the water stop position, attach the work valve V and a perforator (not shown) on top of the split pipe S, and use the perforator to drain the fluid according to the prescribed procedure. Perforate only one side of the tube and remove the perforator.

At this time, since the perforation is made smaller than the inner diameter of the pipe, the strength of the fluid pipe is not significantly reduced, the design strength of the split pipe S can be reduced, and the perforation speed by the perforation machine can be increased. 2. Place the device with the water stop valve A accommodated in the casing 3 on the closed working valve v, and fix it with bolts and nuts via the flange 32 of the casing 3.

...Refer to Fig. 1 3 Connect the plug 9 of the casing 3 and the plug 9'' of the divided tube with a hose, and after allowing the fluid to flow into the casing 3, open the work valve V and rotate the handle H. Then, the feed rod is paid out downward and pushes down the stopcock A. The stopcock A is inserted into the drilled hole Q, and the flange 13 of the stopper body 1 is attached to the periphery of the hole Q via the rubber ring 15. Once it is in close contact and reaches the bottom of the fluid pipe P, the handle H
Then, the expansion ring 82 is fitted into the upper end of the lowered upper expansion rod 61, and then the expansion ring 8
2, and attach the handle h to the expansion nut 81. ...Refer to Fig. 2 4 handle h
When the expansion rod 6 is pushed down against the spring 7 through the expansion rod pressing member 8, the rubber plate 2 slides out from the stopper body 1 and is pressed down. When the rubber plate 2 is pressed down,
The rubber plate bulges out from the side of the stopper body 1 and comes into close contact with the inner circumferential wall of the pipe P, blocking fluid. ...See Figures 3 and 4. To get the fluid flowing again, just do the opposite. That is, the handle h is rotated in the opposite direction to return the rubber plate 2 to its original position. At this time, the biasing force of the spring 7 allows the rubber plate 2 to smoothly return to the predetermined position. Next, after releasing the engagement between the pressing member 8 and the expansion rod 6, the handle H is rotated in the opposite direction and the stopcock A is pulled up until it is accommodated in the casing 3. Thereafter, the work valve V is closed and the device is sprayed away.
After this device is removed, the plug cover is attached to the split tube S using the fixing bolt R according to a predetermined procedure, and the blind cover is further fixed to restore the original tube. The plug device of the present invention is not limited to the configuration of the above-described embodiments, and various design changes can be made without departing from the basic technical idea of the present invention.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIGS. 1 to 3 are longitudinal cross-sectional views of the apparatus of the present invention shown for each operating procedure, FIG. 4 is a partially sectional side view of FIG. 3, and FIG. The figures and FIG. 6 are Y-Y and X-X arrow views of FIG. 1, and FIG. 7 is a perspective view of the stopper body. A... Stop valve, 1... Tap body, 2...
...Sealing rubber plate, 3...Casing, 4
...Wheel shaft, 5...Feed rod, 6.
...Expansion rod, 61...Upper expansion rod,
63... Lower expansion rod, 7... Spring,
8...Expansion rod pressing member, H, h...
・Handle, P...Fluid pipe, S...Divided tube, V...Work valve.

Claims (1)

[Scope of Claims] 1. An uninterrupted water stop that has a water stop valve A that is inserted into the inside of the pipe through a hole Q that is drilled below the inner diameter of the pipe P that is water cut off, and is composed of the following A to D: Construction plug device. (a) The stopcock A consists of a stopper body 1 and a sealing rubber plate 2 that is shaped like a U-shape and is slidably arranged surrounding the center wall 11 of the stopper body 1; rod 5
The feed rod 5 is housed in a hollow part of the shaft 4 having a feed handle H at the upper part thereof so as to be freely inserted into the hollow part of the shaft 4. Two expansion rods 6 arranged in
The expansion rod 6 has an expansion handle h and is removably attached to an expansion rod pressing member 8 which is in a threaded relationship with the shaft 4. A faucet A is housed in a manner that can be freely taken out and taken out, and its upper end is watertightly covered with a lid 33, which rotatably fixes the lower end of the shaft 4 and allows the expansion rod 6 to be slidably inserted therethrough.