JPH04285205A - Seal device of gate - Google Patents

Abstract

PURPOSE:To provide a seal device which can attain a suitable watertight structure in a comparatively simple constitution without introducing a large driving mechanism and an expensive attachment into a gate, eliminate the need of a countermeasure for abrasion of an elastic seal material and effectively correspond to a high-pressure gate. CONSTITUTION:An elastic seal material 5 is provided on the peripheral edge of an opening 2 of a waterway 1 closed by a gate in such a manner as to be opened and closed, and a pipe 8 made of a shape memory alloy and a pipe heating heater 9 are buried in the elastic seal material 5. The pipe 8 is deformed by controlling the temperature for heating the pipe 8 so that the surface of the seal material 5 is pressed to the gate 3 side.

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 in a main gate opening/closing section in a dam.

0002

[Prior Art] Conventionally, as this type of sealing device, as shown in FIG.
As shown in FIG. 2, an elastic sealing material 42 made of rubber or the like is attached to the periphery of the opening 41a of the conduit 41, and when the gate 43, which can move forward and backward to open and close the opening 41a, is closed, the sealing material is removed by the gate 43. Some are known in which the gate 42 is pressed against the other, and others in which the gate 43 is slidable while being in contact with the elastic sealing material 42 as shown in FIG.

Separately, as shown in FIG. 6, a cavity 44 is formed in the elastic sealing material 42, and pressurized water 45 is supplied into the cavity 44, thereby reducing the elastic sealing material 42. There are also known devices in which the surface is raised so as to come into pressure contact with the gate 43.

0004

However, in the conventional device shown in FIG. 4, the gate 43 is moved forward and the elastic sealing material 4 is removed.
2, there are drawbacks such as a complicated movement mechanism (not shown) for advancing and retracting the gate. Also,
In the one shown in FIG. 5, since the gate 43 is of a contact sliding type, the elastic sealing material 42 is subject to severe wear, requiring frequent maintenance work such as replacement of the elastic sealing material 42.

Furthermore, the system shown in FIG. 6 requires a special pressure water generation and supply device for supplying pressure water 45 to the cavity 44 of the elastic sealing material 42, which increases equipment costs and reduces the dam water level. becomes higher and the pressure acting on the gate 43 increases, the elastic sealing material 42 closes in the cavity 44.
There was a risk that buckling would occur in these areas, making it impossible to achieve sufficient watertight performance.

The present invention has been made to solve the above-mentioned problems, and has a relatively simple structure and can be manufactured at low cost.It also extends the life of the sealing material, and can be used regardless of the pressure level. It is an object of the present invention to provide a gate sealing device that can maintain proper sealing function.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an elastic sealing material that is attached to the periphery of the opening of a water channel that can be opened and closed by a gate, and that the elastic sealing material is heated by a predetermined heating temperature difference. A pipe made of a shape memory alloy whose surface portion is brought into contact with the gate side in a reversible manner and a heater for heating this pipe are embedded in the elastic sealing material.

[0008]

[Function] According to the present invention having the above structure, when the gate is closed (when water is stopped), the surface of the elastic sealing material is pressed against the gate side when the pipe is deformed, ensuring watertightness, and When the gate is opened, when the pipe is heated to a predetermined temperature by energizing the heater, the pipe returns to its original state, so that the elastic sealing material also returns to its original state and moves away from the gate to allow the discharged water to flow down. In other words, since the sealing performance between the gate and the gate is obtained by deformation from the elastic sealing material side, there is no need for a mechanism for advancing and retracting the gate, and there is no need to take precautions against abrasion of the sealing material, and compared to those that pump high-pressure water. Not only can equipment costs be reduced, but it can also be used with high-pressure gates.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a gate sealing device according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a waterway within a dam 2, and 3 a gate, which is provided with a skin plate 4 for closing an opening 1a of the waterway 1 in an openable and closable manner. Reference numeral 5 denotes a rubber sealing material that corresponds to the skin plate 4 and is attached in a loop around the periphery of the opening 1a so as to surround the opening 1a.

As shown in FIGS. 2 and 3, the sealing material 5 is formed to have a substantially convex cross section, and both ends of the sealing material 5 in the lateral direction are fixed to the dam 2 side using a holding member 6 and bolts 7. There is. Further, a pipe 8 made of a shape memory alloy is embedded in the central portion of the sealing material 5 over its entire length. When the heating temperature has not reached a predetermined temperature, this pipe 8 has a vertically flat cross-sectional shape that raises the center of the sealing material 5, and returns to a circular shape (shape memory) at a predetermined temperature. It is set as follows. Reference numeral 9 denotes a plurality of pipe heating sheathed heaters that are inserted into the pipe 8 and deform the pipe 8. The reason why multiple wires are used is to reduce the risk of wire breakage. 1
0 is a controller such as a voltage regulator for controlling heat generation to the sheathed heater 9.

Next, the operation of the above configuration will be explained. When the gate is closed (when water is cut off), the shape memory alloy pipe 8 remains in a vertically long flat shape as shown in FIG. The surface of the portion 5a is pressed against the skin plate 4 on the gate 3 side. Thereby, the space between the gate 3 and the opening edge of the water channel 1 is kept watertight.

When opening the gate 3, the controller 10 energizes the sheathed heater 9 to generate heat. When the pipe 8 is heated to a predetermined temperature by the heat generated by the sheathed heater 9, the pipe 8 restores its shape-memorized circular state as shown in FIG. For this reason, the sealing material 5
Since the center portion 5a of the skin plate 4 is also elastically restored and its surface is flattened, a gap G is created between the skin plate 4 and the drained water to flow down.

[0014] Here, a watertight structure can be obtained by simply deforming the shape memory alloy pipe 8 embedded in the rubber sealing material 5, so the configuration is simple and does not require a complicated mechanism for advancing and retracting the gate 5. It does not require special equipment for supplying high-pressure water and can be manufactured at low cost. In addition, the sealing material 5
Since no sliding resistance acts on the sealing material 5, frequent maintenance due to wear of the sealing material 5 is not required.

In particular, the pipe 8 embedded in the sealing material 5 imparts deformation rigidity to the sealing material 5, and even when used in a high-pressure gate, the high-pressure water sealing material 5
This prevents buckling and maintains effective watertight performance.

Furthermore, the degree of deformation of the pipe 8, in other words, the amount of pressure contact between the sealing material 5 and the skin plate 4 can be easily controlled by adjusting the heat generation temperature by energizing the sheathed heater 9 to deform the sealing material 5. be able to.

[0017] Furthermore, the pipe 8 made of shape memory alloy allows
Compared to those that use high-pressure water, it is possible to greatly change the shape of the sealing material 5, and therefore, when the gate is opened, the surface of the central portion 5a of the sealing material 5 is flattened to minimize disturbance of the discharged water. There is also the advantage of being able to

[0018] The pipe 8 can also be made to return from its circular state to a laterally elongated flat shape by applying a predetermined heating temperature.

[0019]

As described above, according to the present invention, a shape memory alloy pipe and a heater for heating the pipe are embedded in the elastic sealing material attached to the opening edge of the waterway, and the pipe is deformed by the temperature difference. Since the elastic seal material is brought into pressure contact with the gate, there is no need to introduce a complicated gate advance/retreat mechanism or expensive pressure water supply equipment, making it possible to achieve a watertight structure at a low cost, as well as reducing wear of the elastic seal material. This eliminates the risk of water-tightness, making maintenance management easier, and especially high-pressure gates can fully demonstrate their proper watertight function.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing a gate sealing device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the main parts of the sealing device when the gate is closed.

FIG. 3 is a sectional view showing the main parts of the sealing device when the gate is opened.

FIG. 4 is a schematic configuration diagram showing a conventional gate sealing device.

FIG. 5 is a schematic configuration diagram showing another conventional gate sealing device.

FIG. 6 is a schematic configuration diagram showing yet another conventional gate sealing device.

[Explanation of symbols]

1 Waterway 1a Opening 3 Gate 5 Elastic sealing material 8 Shape memory alloy pipe 9 Heater

Claims (1)

[Claims] Claim 1: A shape memory device in which an elastic sealing material is attached to the periphery of the opening of a waterway that is openable and closable with a gate, and the surface of the elastic sealing material is press-contacted to the gate side so that it can return to its original state by a predetermined heating temperature difference. A gate sealing device characterized in that an alloy pipe and a heater for heating the pipe are embedded in the elastic sealing material.