JPH066995B2 - Sluice gate closing valve repair replacement method - Google Patents

Description

Detailed Description of the Invention a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sluice gate closing valve repair and replacement method in which a sluice gate closing valve can be repaired or replaced by a simple means.

B. Conventional technology Conventionally, when repairing or replacing with a new valve due to malfunction or failure of the water gate closing valve, other performance deterioration, etc.
Prior to the valve replacement, it is necessary to block the water gate inlet to stop the water flow to the mounting valve, but to block the inlet at a dam, etc. The reality is that there is no suitable means, and not only the underwater work itself is extremely difficult, but it also becomes more difficult when there are problems with water depth, work sedimentation factors such as sedimentation, shrubbery, and so on. In some places it was impossible to exchange.

C. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention enables repair or replacement of a water lock main closing valve by a simple means without repairing the water lock main valve or replacing it with a new valve without performing the underwater work as in the conventional case. It is intended to obtain the method for repairing and replacing the original lock of the water gate.

D. Means for Solving the Problems The present invention has been made in view of the above viewpoints, and is a valve closing step of setting a valve body from a fully open position to a fully closed position in a water-passing state, directly to the valve body. Detaching step of separating the connecting tube from the single tube attached to, a water shutting step of stopping water near the inlet of the single tube, a valve opening step of fully opening the valve body, and the single tube sandwiching the valve body. A pipe cleaning step of cleaning the inner wall surface of the iron pipe to the required position on the opposite side, a valve closing step of fully closing the valve body after the pipe cleaning step, and a water stopping step of stopping water near the single pipe internal inlet by water stopping means. A valve opening step of fully opening the valve body, a water stopping step of moving the water stopping means to a required position of the iron pipe to stop the water,
Water gate main valve repair and replacement method consisting of a removal work step comprising a separation step of separating the valve body from an iron pipe including the water stop means, and a replacement valve body installation restoration work step performed in the reverse order of the removal work step Is to provide.

E. Functions and Examples Hereinafter, the construction method according to one embodiment of the present invention will be described in detail together with functions.

First, the valve body 1 is set to the fully closed position shown in FIG. 1 from the fully opened position in the water-permeable state to stop the water. In this case, there is no problem if water leakage from the valve does not hinder the work. Therefore, the connecting portion 4 between the single pipe 2 and the connecting pipe 3 directly attached to the valve body 1 is removed, whereby the connecting pipe connecting side of the single pipe 2 is opened to open the inside of the single pipe 2. Set up so that the still water cleaner A can be inserted from the side.

The waterproof cleaner A includes a cleaner rod 5 of a required length, a water stopper 6 slidably fitted on the outer periphery of the tip end thereof, and a watertight seal between the water stopper 6 and the rod 5. A packing 7, a packing retainer 8 bolted to the water stopcock 6 to hold the packing 7, and an outer tube 9 which is concentrically fitted on the outer side of the rod 5 and fixed to the back surface of the water stopcock 6. From the watertight rubber 10 attached to the outer periphery of the tip of the outer tube 9, the pressing ring 11 that abuts the back surface of the watertight rubber 10, and the compression nut 13 that is screwed to the outer tube 9 via the washer 12 to the pressing ring 11. A water stopper device 14, a fixed blade 15 provided at the tip of the rod 5 in the radial direction in the equiangular direction as shown in FIG. 6, and the fixed blade 15.
It is constituted by an in-tube cleaner 17 which comprises a movable blade 16 which is slidably moved to project outward.

At the time of work, first, the in-pipe cleaner 17 and the water stop device 14 are inserted from the open side of the single pipe 2.

In this case, as shown in FIG. 7, depending on the internal condition of the single tube 2, the tip of the rod 5 is inserted from the open side near the inside inlet of the single tube 2 and then the rod 5 is rotated. Then, the movable blades 16 are shaken out by the centrifugal force and scrape off the rust and other adhered substances a in the single pipe 2. Next, as shown in FIG. 2, the water shutoff device 14 is installed as described above.
Since the vicinity of the inlet in the pipe is smooth, the water stopper rubber 10 is in close contact with the inside of the pipe.

Then, 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 peripheral 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 prior to that, as a safety measure, the pressing ring 11 is attached to the flange of the connecting portion 4 so that the waterproof cleaner A does not pop out due to water pressure.
Stopper 18 to prevent the escape of the single tube 2
Attached.

After that, the valve body 1 is fully opened as shown in FIG. 2, and the valve body 1 is sandwiched between the iron pipe 19 and the imaginary line position which is the mounting position of the steel pipe 19 on the opposite side. As shown in FIG. 7, the pipe cleaner 17 is moved forward while rotating the rod 5 to clean the inner wall surface of the pipe 17 between them. When the cleaning is completed, the in-tube cleaner 17 is pulled again to the position indicated by the solid line in FIG. 2 to fully close the valve body 1.
Next, the safety stopper 18 is removed, the compression nut 13 is loosened, and the still water cleaner A is taken out from the single pipe 2.

Next, in the still water cleaner A, the rod 5 with the in-pipe cleaner 17
Is removed from the water stop device 14. Separately, as shown in FIG. 8, attached to the outer periphery of the tip end portion of a tension rod 23 attached via a rod joint 20 to a stopper rod 22 that is integrally provided orthogonal to the center of the back surface of a disk-shaped water stopcock 21. The watertight rubber 24 is supported by a pressing ring 25, and the rod 23
A compression pipe 26 that is externally concentrically installed and abuts the back surface of the pressing ring 25 is provided, and a compression nut 27 that is screwed onto the end portion of the rod 23 and presses and operates the compression pipe 26. A water faucet device 28 is provided, and as shown in FIG. 3, the rods 22 and 23 of the water faucet device 28 are inserted into the water faucet device 14 and inserted into the single pipe 2 as described above.
Tighten the compression nut 13. Thereby the watertight rubber 1
The outer peripheral surface of 0 adheres to the inner surface of the single pipe 2 to stop water. After that, the valve body 1 is opened, but prior to that, as described above, as a safety measure, the pressing ring 11 is attached to the flange of the connecting portion 4 from the single pipe 2 so that the single pipe insert does not pop out by water pressure. A safety stopper 18 is attached to prevent the escape.

Then, the valve body 1 is fully opened, and the rods 22 and 23 are moved forward to position the water stop device 28 at a required position in the iron pipe 19 opposite to the single pipe 2 that sandwiches the valve body 1. Let Since the vicinity of the inside of the pipe is smooth, the watertight rubber 24 comes into close contact with the inside of the pipe to stop water. Then, when the compression nut 27 is tightened, the watertight rubber 24 is laterally pressed by the pressing ring 25 via the compression tube 26 and bulges outward. As a result, the watertight rubber 24
The outer peripheral surface of the is in close contact with the inner surface of the iron pipe 19 to stop water.

When the position of the compression nut 27 is determined, the pedestal 41 that abuts on the compression nut 27 and supports the position is fixed by the anchor bolt 42 as shown in FIG. In this case, the receiving means by the receiving base 41 varies depending on the work place and the like. When the water stop device 28 is completely fixed,
As shown in FIG. 4, the bolt 30 at the connecting portion 29 between the valve body 1 and the iron pipe 19 is removed. As a result, the valve body 1, the single pipe 2, the water stop 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 iron pipe 19 side as it is. afterwards,
After removing the pedestal 41, the tension rod 2
3 is separated from the stopper rod 22 by the rod joint 20. As a result, as shown in FIG. 5, with the water stop device 28 inserted and fixed inside the iron pipe 19, the other parts are separated and separated to complete the removal work. In this case, a pre-compression nut 32 is screwed and fastened to the stopper rod 22 of the water stopper apparatus 28 to completely stop the water.

Next, the restoration work may be performed in the reverse order of the above-mentioned removal work, but a brief description will be given below.

A single pipe 2 is connected to a replacement valve body 1 such as a new valve or a repaired valve, and a water stop device 14, a tension rod 23, a compression pipe 26, etc. are set in the single pipe 2, while the iron pipe 1
The pre-compression nut 32 of the water stop device 28 in 9 is removed and the tension rod 23 is connected thereto via the rod joint 20. When the end position of the tension rod 23 is thereby determined, the pedestal 41 is installed, the safety stopper 31 is removed, and the exchange valve body 1 is connected to the iron pipe 19. Then, the pedestal 41 is removed, the compression nut 27 is loosened, and the water stopper device 2 in the iron pipe 19 is removed.
8 is drawn to the single pipe 2 side, the valve body 1 is closed, and then all the inserts are pulled out to finish the installation of the replacement valve body 1. Finally, the connection pipe 3 is attached to complete the construction.

F. EFFECTS OF THE INVENTION As is apparent from the above description, the present invention makes it easy to repair or replace a water gate main closing valve without performing any underwater work as in the conventional case when repairing the water gate main closing valve or replacing it with a new valve. This is a convenient and useful method for repairing and replacing the water gate valve, which contributes to ease of construction, work safety, labor saving, etc.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part showing a portion to which the construction method of the present invention is applied, FIG. 2 is a cross-sectional view showing a state of a waterproof cleaning process of the construction method of one embodiment of the present invention, and FIG. Plug rod 2 of device 28
2 and the tension rod 23 are inserted into the water stopper 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 water stopper device 14 adheres to the inner surface of the single pipe 2. 4 is a cross-sectional view showing a state in which the water is stopped by removing the bolt 30 of the connecting portion 29 between the valve body 1 and the iron pipe 19 to integrally integrate the valve body 1, the single pipe 2, the water stop device 14, etc. FIG. 5 is a cross-sectional view showing a state in which the safety stopper 31 is attached to the flange of the connecting portion 29 on the side of the iron pipe 19 of the connecting portion 29 while moving it to the downstream side, and FIG. FIG. 6 is a cross-sectional view showing a state in which the others are separated and separated, FIG. 6 is a perspective view showing an example of the configuration of the in-pipe cleaner 17, and FIG. 7 is a state in which rust and the like in the pipe are scraped off by the in-pipe cleaner 17. FIG. 8 is a sectional view showing the structure of the water stop device 28. Is a perspective view showing an example.

Claims (1)

[Claims] 1. A valve closing step of setting a valve body 1 from a fully open position to a fully closed position in a water-permeable state, a detaching step of separating a connecting pipe 3 from a single pipe 2 directly attached to the valve body 1, A water stopping step of stopping water near the inner inlet of the single pipe 2, a valve opening step of fully opening the valve body 1, and a pipe inner wall surface up to a required position of the iron pipe 19 opposite to the single pipe 2 with the valve body 1 interposed therebetween. A pipe cleaning step of cleaning, a valve closing step of fully closing the valve body 1 after the pipe cleaning step, a water shutting step of shutting water near the inside inlet of the single tube 2 by a water shutting means, and the valve body 1 being fully opened. A removal operation step including a valve opening step, a water stopping step of moving the water stopping means to a desired position of the iron pipe 19 to stop the water, and a separation step of separating the valve body 1 from the iron tube 19 including the water stopping means, And the exchange performed in the reverse order of the removal work process. Sluices Motojime valve repair and replacement method characterized by comprising a valve body mounted recovery work process.