JPH0389091A - Repair and replacement of water gate main valve - Google Patents

Abstract

PURPOSE:To improve simplicity, convenience and safety of work by constituting the work with removal processes comprising the processes for closing a valve, removing connection pipes, stopping water, cleaning the inside of pipes, closing the valve after cleaning, stopping water, and separating the valve body, and with replacement valve restoration processes in the reverse order of the removal processes. CONSTITUTION:The work consists of removal processes for removing a valve body 1 which is out of order or the like from a steel pipe 19, and replacement valve attachment restoration processes. The removal processes comprises the processes for closing a valve body 1, removing a connection pipe 3 from a single pipe 2, stopping water in the single pipe 2, closing the valve body 1, cleaning the inner wall of the single pipe 2, closing the valve body 1 after cleaning, stopping water, opening the valve body 1, stopping water, and separating the valve body 1 from the steel pipe 19. As a result, the valve may be repaired or replaces easily without performing underwater work.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a method for repairing and replacing a water gate closing valve, which allows the water gate closing valve to be repaired or replaced by simple means.

0. Conventional technology Conventionally, when repairing or replacing a water gate closing valve with a new one due to malfunction, failure, or other performance deterioration,
Before replacing the valve, the inlet of the water gate must be closed off to stop the flow of water to the valve, but in dams, etc., the only way to close the inlet is to have a worker go underwater and do the blocking work. The reality is that there is no suitable means for repairing the valve, and not only is the underwater work itself extremely difficult, but it becomes even more difficult when problems with water depth, sedimentation, sinking wood, and other obstacles to the work come together. In some cases, replacement was impossible.

Problems to be Solved by the Invention The present invention is capable of repairing or replacing a water gate closing valve by a simple means without having to perform underwater work as in the conventional method when repairing or replacing the water gate closing valve with a new valve. The purpose of this project is to develop a method for repairing and replacing the water gate closing valve.

Means for Solving the Three Problems The present invention has been made in consideration of the above points, and includes a valve closing process of setting the valve body from a fully open position with water flowing to a fully closed position; A removal process to separate the connecting pipe from the directly attached single pipe, a water shutoff process to shut off water near the internal inlet of the single pipe, a valve opening process to fully open the valve body, and a removal process to separate the connecting pipe from the single pipe with the valve body in between. A pipe cleaning process of cleaning the inner wall surface of the pipe to a required position on the opposite side of the pipe, a valve closing process of fully opening the valve body after the pipe cleaning process, a water shutoff process of shutting off water near the internal entrance of the single pipe, and the valve body a removal work step consisting of a valve opening step of fully opening the valve, a water shutoff step of shutting off water at a desired position of the iron pipe, a separation step of separating the valve body including the water stopper means from the iron pipe including the water stopper means; This is an attempt to provide a method of repairing and replacing a water gate closing valve, which consists of a replacement work process and a return work process, in which the replacement valve body is installed in the reverse order of the removal work process.

6. Effects and Examples Below, the construction method of the present invention will be explained in detail together with its effects.

First, the valve body 1 is set from the fully open position where water is flowing to the fully closed position shown in FIG. 1 to shut off water. In this case, there is no problem as long as water leakage from the valve does not interfere with work. Therefore, the connection part 4 between the single pipe 2 and the connecting pipe 3, which is directly attached to the valve body 1, is removed, thereby opening the connecting pipe connection side of the single pipe 2, and allowing the inside of the single pipe 2 to be exposed. Set so that the water-still vacuum cleaner A can be inserted from the open side.

The water-stop vacuum cleaner A includes a vacuum cleaner rod 5 of a required length, a water-stop plug 6 slidably fitted on the outer periphery of its tip, and a water-tight seal between the water-stop valve 6 and the rod 5. a gasket 7 to hold the gasket 7, a gasket retainer 8 bolted to the water stopcock 6 to hold the gasket 7, an outer tube 9 concentrically mounted on the outside of the rod 5 and fixed to the back surface of the water stopcock 6; From a watertight rubber 10 attached to the outer periphery of the tip of the outer tube 9, a press ring 11 that comes into contact with the back surface of the watertight rubber 10, and a compression nut 13 that is screwed onto the press ring 11 and the outer tube 9 via a washer 12. As shown in FIG.
The pipe cleaner 17 is composed of a movable blade 16 that can slide and extend outward.

During the work, first, the pipe cleaner 17 and the water stop valve device 14 are inserted from the open side of the single pipe 2.

In this case, depending on the internal condition of the single tube 2, the tip of the rod 5 is inserted into the vicinity of the internal entrance of the single tube 2 from its open side, and then the rod 5 is rotated.

Then, the movable blade 16 is swung out by centrifugal force and the single tube 2
Scrape off rust and other deposits a.

Next, as shown in FIG. 2, the stop valve device 14 is installed as described above, but since the vicinity of the entrance into the pipe is smooth, the stop valve rubber 10 comes into close contact with the inside of the pipe.

Therefore, when the compression nut 13 is tightened, the watertight rubber 1
0 is laterally pressed by the pressing ring 11 and bulges outward, and the outer circumferential surface of the watertight rubber 10 comes into close contact with the inner surface of the single tube 2 to stop water. After that, the valve body 1 is opened, but before that, a pressure ring 11 is attached to the flange of the connection part 4 as a safety measure so that the water-stop vacuum cleaner A does not fly out due to water pressure.
a safety stopper 18 that prevents the material from escaping from the single pipe 2;
Attach it.

After that, the valve body 1 is fully opened as shown in FIG. 2, and the stop valve of the iron pipe 19 on the opposite side of the single pipe 2 with the valve body 1 in between is installed to the imaginary line position. As shown in FIG. 7, the pipe cleaner 17 is moved forward while rotating the rod 5, and the pipe inner wall surface therebetween is cleaned.

After cleaning is completed, the pipe cleaner 17 is pulled again to the solid line position in FIG. 2 to fully open the valve body 1. Next, the safety stopper 18 is removed, the compression nut 13 is loosened, and the water-stop vacuum cleaner A is taken out from the single pipe 2.

Next, during the water stop cleaning IA, the rod 5 with the pipe cleaner 17
is removed from the stop valve device 14. Separately, as shown in FIG. 8, the outer periphery of the tip of a tension rod 23 is attached via a rod joint 20 to a plug rod 22 that is integrally provided perpendicularly to the center of the back surface of a disc-shaped water stop valve 21. The attached watertight rubber 24 is supported by a pressing ring 25, and the rod 2
A compression pipe 26 is disposed concentrically on the outside of the rod 23 and abuts against the back surface of the pressing ring 25, and a compression nut 27 is screwed onto the distal end of the rod 23 to press the compression pipe 26.
A stop valve device consisting of c? is provided, and as shown in FIG. 2B rods 22 and 23 are inserted into the stop valve device 14 and inserted into the single pipe 2 in the same manner as described above, and the compression nut 13 is tightened.

As a result, the outer circumferential surface of the watertight rubber 10 comes into close contact with the inner surface of the single tube 2 to shut off water. After that, the valve body 1 is opened, but
Prior to this, as a safety measure, a safety stopper 18 is attached to the flange of the connecting portion 4 to prevent the pressing ring 11 from escaping from the single pipe 2, as described above, so that the single pipe insert does not pop out due to water pressure. I'll keep it.

After that, the valve body 1 is fully opened, the rods 22 and 23 are moved forward, and the stop valve device 2 is placed at a desired location in the iron pipe 19 on the opposite side of the single pipe 2 that sandwiches the valve body 1. position. Since the area around the inside of the pipe is smooth, the watertight rubber 24 comes into close contact with the inside of the pipe to shut off water. Therefore,
When the compression nut 27 is tightened, the watertight rubber 2
4 is pressed from the side by the pressing ring 25 through the compression tube 26 and bulges outward. As a result, the outer circumferential surface of the watertight rubber 24 comes into close contact with the inner surface of the iron pipe 19 to shut off water.

Once the position of the compression nut 27 is determined, a pedestal 41 that abuts the compression nut 27 and supports its position is fixed with an anchor bolt 42.

In this case, the pedestal means by the pedestal 41 described above differs depending on the work place and the like. When the stop valve device 2B is completely fixed, the bolt 30 of the connecting portion 29 between the valve body 1 and the iron pipe 19 is removed as shown in FIG. Thereby, the valve body 1, the single pipe 2, the stop valve device 14, etc. are integrally moved to the downstream side, and the safety stopper 31 is attached to the flange of the connecting portion 29 on the side of the iron pipe 19 in that state. Thereafter, the pedestal 41 is removed and the tension rod 23 is separated from the plug rod 22 using the rod joint 20. As a result, as shown in FIG. 5, with the stop valve device 28 inserted and fixed inside the iron pipe 19, the other parts are separated and the removal work is completed. In this case, the water stop valve device 28
A pre-compression nut 32 is screwed onto the stopper rod 22 and tightened to completely shut off water.

Next, the restoration work can be carried out in the reverse order of the above-mentioned removal work, which will be briefly explained below.

A single pipe 2 is connected to a replacement valve body 1 such as a new valve or a repaired valve, a main faucet device 14, a tension rod 23, a compression pipe 26, etc. are set to the single pipe 2, and the iron pipe 1
9 is removed, and the tension rod 23 is connected to it via the rod joint 20. Once the end position of the tension rod 23 is determined, the pedestal 41 is installed, the safety stopper 31 is removed, and the replacement valve body 1 is connected to the iron pipe 19. Then, remove the pedestal 41, loosen the compression nut 27, pull the stop valve device 2 inside the iron pipe 19 toward the single pipe 2, close the valve body 1, and then pull out all the inserts and replace them. After completing the installation of the valve body 1, the connecting pipe 3 is finally installed to complete the construction.

EFFECT OF THE INVENTION As is clear from the above description, the present invention can improve the water gate closing valve (B Since the replacement can be carried out perfectly with a simple method, it is an extremely convenient and useful water gate tightening valve replacement method that contributes to ease of construction, work safety, and labor savings. .

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the main part showing the location where the construction method of the present invention is applied, Fig. 2 is a cross-sectional view showing the status of the water shutoff cleaning process of the construction method of one embodiment of the present invention, and Fig. 3 is a water stop valve. Bung rod 2 of device 28
2 and tension rod 23 are inserted into the stop valve device @14 and inserted into the single pipe 2, and the compression nut 13 is tightened so that the outer peripheral surface of the watertight rubber 10 of the stop valve device 14 is on the inner surface of the single pipe 2. Fig. 4 is a cross-sectional view showing a state in which the valve body 1 and the iron pipe 19 are tightly connected and fixed, and the bolt 30 of the connection part 29 between the valve body 1 and the iron pipe 19 is removed, and the valve body 1, the single pipe 2, the main faucet device 14, etc. are integrated. 5 is a cross-sectional view showing a state in which the safety stopper 31 is attached to the flange on the iron pipe 19 side of the connection part 29 after the water stop valve device 28 is inserted and fixed inside the iron pipe 19. FIG. 6 is a perspective view showing an example of the configuration of the pipe cleaner 17, and FIG. 7 shows rust and other dirt inside the pipe being scraped off by the pipe cleaner 17. A sectional view showing the state, and FIG. 8 is a perspective view showing an example of the configuration of the main faucet device 28. Figure 6 Figure 7

Claims (1)

[Claims] A valve closing process for setting the valve body 1 from a fully open position with water flowing to a fully closed position, a removal process for separating the connecting pipe 3 from the single pipe 2 directly attached to the valve body 1, and an internal inlet for the single pipe 2. A water stop process of shutting off water in the vicinity, a valve opening process of fully opening the valve body 1, and a valve opening process of fully opening the valve body 1;
A pipe cleaning process of cleaning the inner wall surface of the pipe to a required position of the iron pipe 19 on the opposite side, a valve closing process of fully closing the valve body 1 after the pipe cleaning process, and a water shutoff process of shutting off water near the internal entrance of the single pipe 2. , a valve opening step in which the valve body 1 is fully opened, a water shutoff step in which water is shut off at a predetermined position of the iron pipe 19, and a separation step in which the valve body 1 including the water stop means is separated from the iron pipe 19 including the water stop means. 1. A water gate closing valve repair/replacement method comprising: a removal work step, and a replacement valve body installation restoration work step, which is performed in the reverse order of the removal work step.