JP2602590B2 - 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 section 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. 3, 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. 4, an elastic sealing material 5 is made of a watertight 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. 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. 3) via a pressure water supply pipe 10 is fitted in a built-in state, and this tube 11 is connected to the dam 1 by bolts 12 (12A, 12A). 12B) is protected by the rubber underlaying plate 13 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. 5, the portion of the watertight rubber 5 which is not pressed against the skin plate 3 is also shown in FIG. When the skin plate 3 passes by, the head 5c of the watertight rubber 5 is pushed upward as shown in FIG. Both shoulders 5 of watertight rubber 5
Although a and 5b are pressed by the taper of the shoulder fitting portions 6a and 6b of the holding member 6, when the pressure of the pressure water W increases, the watertight rubber 5 may come off.

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 in an excessively pressed state, the gate valve 4 is lowered as it is, and 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 is required for the watertight rubber 5, and if the rigidity of the watertight rubber 5 is not ensured so as to satisfy this demand, the watertight rubber 5 may be abnormally deformed by the water pressure to cause water leakage or a presser fitting. 6 may be damaged by impact.

The present invention has been made in view of the above-mentioned circumstances, and can prevent water-tight rubber from coming out due to opening and closing operations of a gate valve. It is another object of the present invention to provide a gate sealing device capable of exhibiting proper sealing properties.

[0009]

In order to achieve the above-mentioned object, the present invention provides a resilient sealing material having a curved portion facing the shoulder near the base of the head on the outer surface of a portion of the head facing the presser fitting. a reinforcing plate having provided Rutomoni, the elasticity of the reinforcing plate
A dowel is provided on the inner surface on the side of the sealing material .

[0010]

According to the above construction, the rigidity of the elastic sealing material is enhanced by the reinforcing plate, so that the elastic sealing material is prevented from being pulled out and pulled out by the skin plate in the opening and closing direction of the gate valve.
Abnormal deformation of the watertight rubber when high water pressure is applied to the head is prevented.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are cross-sectional views showing a gate sealing device according to the present invention in a state where pressure water is not supplied and supplied, respectively, and the same parts as those in the conventional example shown in FIGS. And their description is omitted.

1 and 2, press fittings 6A, 6 at the head 5c of a watertight rubber 5 as an elastic sealing material.
A metal plate, for example, a stainless steel plate 21 (2) is provided on the outer surface of the portion opposed to B as a reinforcing plate having a curved portion 21a facing the shoulders 5a and 5b near the root of the head 5c.
1A, 21B). A dovetail 21b is attached to the inner surface of the stainless steel plate 21 for mechanically and firmly coupling with the watertight rubber 5. 22
(22A, 22B) are notches formed in the lower inner edge of the holding member 6 corresponding to the curved portions 21a of the stainless steel plate 21. Wire steel wires 23 (23A, 23A) are provided on both shoulders 5a, 5b of
B) is buried.

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 head 5c of the watertight rubber 5 is reinforced by the stainless steel plate 21 and Since the rigidity of the gate valve 4 in the opening and closing direction is increased by the curved portion 21a, the head 5c of the watertight rubber 5 is prevented from being largely deformed by the skin plate 3, and therefore, the watertight rubber 5 may come off. Is effectively prevented. Further, even when the skin plate 3 is excessively pressed against the watertight rubber 5 due to a change in conditions such as air temperature and water pressure, and the friction between the skin plate 3 and the watertight rubber 5 is increased, the watertight rubber 5 is dragged out. It is not.

Further, since the rigidity of the watertight rubber 5 is enhanced by the stainless steel plate 21, even if the water pressure applied to the head 5c of the watertight rubber 5 becomes high, the watertight rubber 5 may be abnormally deformed. 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.

Although the retaining effect of the watertight rubber 5 can be sufficiently exhibited only by the stainless steel plate 21, the wire steel wire 23 is attached to both shoulders 5a and 5b of the watertight rubber 5 as in the above embodiment.
When the is embedded, the retaining of the watertight rubber 5 is further strengthened.

[0017]

As described above, according to the present invention, the outer surface of the portion of the head of the elastic sealing material facing the holding member is
A reinforcing plate having a curved portion facing the shoulder near the root of the head is provided, so that the elastic sealing material can be prevented from coming off at the time of opening and closing the gate valve, and even when the water pressure is high, this elastic sealing material can be prevented. It is also possible to eliminate the risk that the material is abnormally deformed, causing water leakage, or being 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 in a state where pressure water is not supplied.

FIG. 2 is a cross-sectional view showing the sealing device in a state of supplying pressurized water.

FIG. 3 is a perspective view showing a dam gate to which the gate sealing device is applied.

FIG. 4 is a cross-sectional view showing a conventional gate sealing device.

FIG. 5 is an explanatory diagram of an intermediate opening state of the gate valve.

FIG. 6 is a view showing a state in which the watertight rubber is expanded and deformed at an intermediate opening of the gate valve.

FIG. 7 is a diagram showing a state in which watertight rubber is extruded.

FIG. 8 is a view showing a state in which watertight rubber is pushed out by a skin plate of a gate valve.

[Explanation of symbols]

 2 Waterway 2a Opening 3 Skin Plate 4 Gate Valve 5 Elastic Sealing Material 5a, 5b Shoulder 5c Head 6A, 6B Holder 11 Elastic Tube 21A, 21B Reinforcement Plate 21a Curved Part

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 against the skin plate of the gate valve, the head of the elastic sealing material may be used. the outer surface of the portion facing the pressure foot, the reinforcing plate having a Mukauwan curved portion to the shoulder side near the base of the head is provided in Rutomo
A dowel is provided on the inner surface of this reinforcing plate on the side of the elastic seal material.
A gate sealing device.