JP2602591B2 - Gate sealing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate sealing device used for an opening / closing portion for opening / closing an opening of a water channel formed in a dam.

[0002]

2. Description of the Related Art As a dam gate, as shown in FIG. 7, an opening 2a of a water channel 2 formed in a dam 1 is opened and closed by a rotational displacement of a gate valve 4 having a skin plate 3. is there. On the periphery of the opening 2a,
An elastic sealing material 5 is provided to be in sliding contact with the skin plate 3 to ensure watertightness when fully closed. The configuration of the sealing device 100 provided with the sealing material 5 will be described with reference to FIG.

In FIG. 8, an elastic sealing material 5 is made of a water-tight rubber having a substantially convex cross section, and both shoulders 5a and 5b are provided with holding metal fittings 6 (6A and 6B) having shoulder fitting portions 6a and 6b and bolts. 7 (7A, 7B) is fixed to the dam 1. The recess 8 formed on the lower surface of the watertight rubber 5 includes:
An elastic tube 11 into which pressure water W is supplied from a water pressure pump 9 (FIG. 7) via a pressure water supply pipe 10 is fitted in a built-in state, and this tube 11 is bolted to the dam 1 by bolts 12 (12A, 12A). 12B) and holding plate 1
3 is protected by a rubber underlay plate 14 fixed.

In such a configuration, when the pressure water W is supplied from the water pressure pump 9 through the pressure water supply pipe 10 into the elastic tube 11, the elastic tube 11 expands. To the solid line. Therefore, the head 5c of the watertight rubber 5 comes into pressure contact with the skin plate 3 of the gate valve 4,
Sealing of this part is achieved.

[0005]

However, according to the above-mentioned conventional structure, in the case of the intermediate opening degree by the gate valve 4 as shown in FIG. 9, the portion of the watertight rubber 5 which is not pressed against the skin plate 3 is also shown in FIG. As shown in the figure, the supply of the pressurized water W causes an expansion deformation and the skin plate 3
Passes, the head 5c of the watertight rubber 5 is pushed upward as shown in FIG. Although both shoulders 5a and 5b of the watertight rubber 5 are pressed by the taper of the shoulder fitting portions 6a and 6b of the holding metal 6, the watertight rubber 5 may come off when the pressure of the pressure water W increases.

When the gate valve 4 is lowered, that is, moved in the closing direction, the pressure water W is removed so that the head 5c of the watertight rubber 5 does not come out. When the gate valve 4 approaches the watertight rubber 5 side and is brought into an excessively pressed state by this, when the gate valve 4 is lowered as it is, the head 5c of the watertight rubber 5 is rubbed by the skin plate 3 and 5c
May be pulled out as shown in FIG.

On the other hand, the design water pressure of the watertight rubber 5 has hitherto been at most 60 m head,
A design water pressure as high as 0 m head is required for the watertight rubber 5, and if the rigidity of the watertight rubber 5 is not ensured to satisfy this requirement, the watertight rubber 5 may be abnormally deformed by the water pressure to cause water leakage, There is a possibility that the metal fitting 6 may be damaged by impact.

The present invention has been made in view of the above circumstances, and it is possible to reliably prevent the watertight rubber from coming off due to the opening and closing operation of the gate valve. An object of the present invention is to provide a gate sealing device capable of exhibiting proper sealing performance without fear of occurrence.

[0009]

According to the present invention, the upper and lower surfaces of both shoulders of an elastic sealing material are formed by inverted tapered surfaces in which the shoulders are widened toward the sides. In addition to burying pipes as reinforcements on both shoulders ,
The pipe diameter should be equal to the shoulder height above.
Is set more than that .

[0010]

According to the above construction, since the upper and lower surfaces of both shoulder portions of the elastic seal material are reversely tapered, it is difficult for the elastic seal material to come off from the holding metal, and the reinforcing material is embedded in both shoulder portions. Therefore, the elastic deformation of the elastic sealing material in the detaching direction is suppressed, and the above-mentioned retaining effect is reliably exhibited.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a gate sealing device according to an embodiment of the present invention. The same parts as those of the conventional example shown in FIGS. I do.

In FIG. 1, the upper and lower surfaces of both shoulders 5a, 5b of a watertight rubber 5 as an elastic sealing material are connected to respective shoulders 5a, 5b.
reverse tapered surface 2 so that b becomes divergent toward the side
1 and 22. Further, the shoulders 5a,
5b, pipes 23 (23A, 23B) made of, for example, stainless steel pipes as a reinforcing material as shown in FIG.
Are buried along the longitudinal direction of the sealing material 5, and the portion surrounding the pipe 23 and the shoulders 5a. 5b
Are provided with carbon fibers 24, 2 as reinforcing materials
5 are buried.

When the watertight rubber 5 in which the pipe 23 is embedded is large, as shown in FIG. 3, the sides 5A and 5B of the watertight rubber 5 along the gate valve opening / closing direction (arrow X) are used. If the pipe 23 is cut as shown in FIG. 4 and an elastic material 26 (26A, 26B) is interposed at the cut portion, the watertight rubber 5 is centered on a line PP along this portion. It can be folded, making transport to the site easier. It should be noted that at least two cut portions are provided on each of the side portions 5A and 5B so as to be folded.

The head 5c of the watertight rubber 5 has an arc-shaped stainless steel plate 27 on its outer surface in order to increase rigidity.
Is provided. The inner surface of the stainless steel plate 27 is provided with a dowel 28 as shown in FIG. 5 in order to strengthen the mechanical connection with the watertight rubber 5.

In such a configuration, the elastic tube 1
When the watertight rubber 5 is expanded and deformed by supplying the pressure water W into the inside 1, the head 5c of the watertight rubber 5 comes into close contact with the skin plate 3 of the valve gate 4, and watertightness can be obtained.

Even when the watertight rubber 5 is expanded and deformed when the gate valve 4 is closed from the intermediate opening, the upper and lower surfaces of both shoulders 5a and 5b of the watertight rubber 5 are inverted tapered surfaces 21 and 2.
2 and the retention is strengthened, and the shoulders 5a, 5
Since the reinforcing pipes 23A and 23B are buried in b, the watertight rubber 5 is prevented from being deformed toward the head 5c side. Therefore, the head 5c of the watertight rubber 5 is suitable for the skin plate 3. , And the sealing property is effectively maintained. Further, the skin plate 3 is excessively pressed against the watertight rubber 5 due to a change in conditions such as temperature and water pressure, and the skin plate 3
Even when the friction between the watertight rubber 5 and the watertight rubber 5 becomes strong, there is no possibility that the watertight rubber 5 is dragged out.

The shoulder portions 5a and 5b of the watertight rubber 5 are also provided.
Even if the water pressure urged to the head 5c of the watertight rubber 5 increases due to the rigidity of the side, the abnormal deformation of the watertight rubber 5 is suppressed, and the risk of water leakage is eliminated. In other words, it is possible to easily cope with a high design head in the waterway 2. Further, since the watertight rubber 5 is less likely to be deformed and hit the presser fitting 6, damage to the watertight rubber 5 is also prevented.

If the diameter of the pipe 23 embedded in the shoulders 5a, 5b of the watertight rubber 5 is set to be equal to or greater than the root height h of the shoulders 5a, 5b, the watertight rubber 5 can be removed. The effect of stopping and strengthening rigidity is remarkably exhibited.

Further, in the above embodiment, the carbon fibers 24 and 25 are provided around the pipe 23 and around the shoulders 5a and 5b of the watertight rubber 5, respectively. . That is, the carbon fiber 2
4, the watertight rubber 5 is reinforced around the pipe, and the shape of the shoulders 5a and 5b can be held by the pipe 23 against the compressive force in the Y direction. The displacement in the X direction is suppressed, and as a result, it is possible to contribute to strengthening of the above-mentioned retaining action.

Further, in the above embodiment, the watertight rubber 5
Since the stainless steel plate 27 having an arc shape is provided on the head 5c, the head 5c is provided with rigidity, and therefore, the deformation of the head 5c when the water pressure is high is reliably prevented. Of course, the stainless steel plate 27 may be embedded in the head 5c of the watertight rubber 5 as shown in FIG. 6, in which case there is no danger that the adhesion of the gate valve 4 to the skin plate 3 will be reduced.

[0021]

As described above, according to the present invention, the upper and lower surfaces of both shoulders of the elastic sealing material are formed by inverted tapered surfaces in which the shoulders widen toward the side. and reinforcement
Bury the pipe and adjust the diameter of the pipe
Since the height of the shoulder is set to be equal to or higher than the height of the shoulder, it is possible to reliably prevent the elastic sealing material from coming off at the time of opening and closing the gate valve, and even when the water pressure is high, It is also possible to eliminate the possibility that the elastic sealing material is abnormally deformed to cause water leakage or to be damaged by hitting the presser fitting.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a gate sealing device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a shoulder portion of watertight rubber.

FIG. 3 is an explanatory view of a method of embedding a pipe so that watertight rubber can be folded.

FIG. 4 is an explanatory view showing a cut portion of the pipe in the case of FIG. 3;

FIG. 5 is a sectional view showing a head of watertight rubber.

FIG. 6 is a cross-sectional view of a state in which a stainless steel plate is embedded in the head of the watertight rubber.

FIG. 7 is a perspective view showing a dam gate to which the gate sealing device is applied.

FIG. 8 is a sectional view showing a conventional gate sealing device.

FIG. 9 is an explanatory diagram of an intermediate opening state of the gate valve.

FIG. 10 is a diagram illustrating a state in which the watertight rubber is expanded and deformed at an intermediate opening of the gate valve.

FIG. 11 is a diagram showing a state in which watertight rubber is extruded.

FIG. 12 is a diagram showing a state in which watertight rubber is pushed out by a skin plate of a gate valve.

[Explanation of symbols]

 2 Channel 2a Opening 3 Skin Plate 4 Gate Valve 5 Elastic Sealing Material 5a, 5b Shoulder 5c Head 6A, 6B Holder 11 Elastic Tube 21, 21 Reverse Tapered Surface 23A, 23B Reinforcement

Claims (1)

(57) [Claims] 1. An elastic sealing material having a substantially convex cross section is disposed at an opening edge of a water passage opened and closed by a gate valve, and both shoulders of the elastic sealing material are fixed by holding metal fittings, respectively. In a gate sealing device configured to supply pressurized water into a built-in elastic tube to expand and deform the sealing material and press the head thereof against the skin plate of the gate valve, both shoulders of the elastic sealing material The upper and lower surfaces of the portion are formed by inverted tapered surfaces in which the shoulder portion is flared toward the side, and a pipe is buried in the above both shoulder portions as a reinforcing material.
At the same time, the diameter of this pipe is
A gate sealing device characterized in that the height is set equal to or higher than the root height .