JPS6231451Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water stop rubber crimping device for a gate.

Figure 1 shows a typical dam. That is, 1 is a dam body, and a high-pressure radial gate 3 is disposed in a spillway 2. This high pressure radial gate 3
is opened and closed by, for example, a hydraulic cylinder type opening/closing device 4, and can come into contact with the water stop rubber 5.
Further, the water stop rubber 5 is connected to a crimping device 7 via a pipe 6. Watertight types of the high pressure radial gate 3 installed halfway up the dam include the following types. In other words, as shown in Figure 2, there are two types of watertight types: sliding type and crimp type.
The sliding type includes a sliding widening type and the sliding smoothing type, and the crimping type includes a door body crimping type and a rubber crimping type. Here, among the sliding types, the wide sliding type and the smooth sliding type have a problem that the rubber resistance is large and the opening/closing device becomes large. Furthermore, among the crimp types, the door body crimp type has a small rubber resistance, but has the problem that it takes time to attach and detach the door body, and is an old type. Therefore, recently, rubber crimping type has been widely adopted. This type of structure is a frame-like watertight structure with four continuous circumferences, with watertight rubber attached to the door stop side. In this case, when fully closed or at a predetermined opening, pressurized water is injected into the water stop rubber to press the water stop rubber to the door body, and during operation, the pressure inside the water stop rubber is reduced by operating the switching valve. It is something to leave.

FIG. 3 shows a conventional rubber crimping mechanism.
In other words, 8 is the No. 2 connecting pipe, 9 is the strainer, and 1
0 is the pressure cylinder, 11 is the limit switch,
12 is an antifreeze, 13 is a pressure switch, 14 is a drain, 15 is a pump, 16 is a tank, and 17 is a switching valve. According to this conventional mechanism, the water stop rubber 5 is pressurized by the pump 15, and the pressure is reduced by operating the switching valve 17. Pressurization or depressurization is detected by limit switch 11 and pressure switch 13. Also, the antifreeze liquid 12 in the water stopper rubber 5 is replaced by a pump 15 and a drain 14.

This conventional configuration causes the following problems.

Γ Structure and operation become complex.

Γ Because there is a leak from the switching valve 17, the pressure inside the water stop rubber 5 cannot be maintained for a long time. Therefore, the frequency of activation of the pump 15 increases.

Γ In the event of a power outage, the dam water pressure is transferred to the pressurized cylinder 10.
The water stop rubber 5 can be pressurized by applying pressure to the water stop rubber 5, but this pressurizing force will vary depending on the dam water level.

Γ Maintenance management becomes complicated.

An object of the present invention is to provide a water-stop rubber crimping device for a gate that solves the above-mentioned problems.

In order to achieve the above object, the water stop rubber crimping device for a gate according to the present invention is provided with a pressurized cylinder that communicates with the water stop rubber through an antifreeze line, and the working chamber of this pressurized cylinder has a switching valve. A power cylinder is provided which communicates with the front surface of the dam via a pressure line and is interlocked with the pressure cylinder, and this power cylinder is configured to be switchable between driving and manual operation.

According to the configuration of the present invention, the water stop rubber is normally pressurized by applying dam water pressure to the working chamber of the pressurizing cylinder through the pressure line, and thereby causing the antifreeze to flow through the antifreeze line into the water stop rubber. In addition, when the water stop rubber is not pressurized sufficiently by the dam water pressure, the shortage can be refilled by operating the power cylinder with the switching valve closed. can be activated by a drive when the power is on, or manually during a power outage.

An embodiment of the present invention will be described below with reference to FIG. 20 is a dam body, and 21 is a water stop rubber.
22 is a pressurized cylinder, which has an operating chamber 23 at the top and an antifreeze chamber (accumulator) at the bottom.
It has 24. The working chamber 23 is connected to a pressurizing line 25
This pressure line 25 communicates with the front of the dam via
A strainer 26 is interposed on the upstream side, and a switching valve 27 is interposed on the downstream side. Also strainer 2
6 and the switching valve 27, the pressure line 25 includes a first pressure gauge 28 that indicates the dam water pressure.
and a second pressure gauge 29 are attached, and the first pressure gauge 2
8 is disposed on the remote control panel, and a second pressure gauge 29 is disposed on the machine side. 30 is the No. 2 connecting pipe,
The pressurizing line 25 is connected to the upstream side of the switching valve 27.
communicate with. The antifreeze chamber 24 and the inside of the water stopper rubber 21 communicate through an antifreeze line 31, and the antifreeze liquid 3
2 distribution is possible. The antifreeze line 3
1 is connected to the antifreeze supply tank 3 via a supply line 33.
4, and this tank 34 has a liquid level gauge 35 and a drain receiver 36. Note that the drain line 53 from the water stop rubber 21 side faces the drain receiver 36. In order to discharge air, vent pipes 37, 38, and 39 are provided to communicate the working chamber 23 and the antifreeze chamber 24 to the inside of the water stopper rubber 21, respectively, and the ends of these vent pipes 37, 38, and 39 are Receiver 40
is facing. A pressure take-off pipe 41 is branched from the middle of the vent pipe 39, and this pressure take-off pipe 41 is connected to a pressure switch 42. A first pressure gauge 43 and a second pressure gauge 44 that indicate the pressure inside the water stop rubber 21 are attached to the pressure extraction pipe 41,
The first pressure gauge 43 is disposed on the remote control panel, and the second pressure gauge 44 is disposed on the machine side. A drain line 46 having a switching valve 45 is connected to the upper part of the working chamber 23.
The terminal end faces the water channel 47. The upper part of the pressurizing cylinder 22 is linked to a power cylinder 48 that has a built-in brake, and this power cylinder 4
8 is configured to be switchable between driving by a motor 49 and manual driving by a handle 50. Reference numeral 51 indicates a limit switch for detecting the operating limit of the pressurizing cylinder 22. A No. 2 communication pipe 52 is connected to the antifreeze line 31.

The action will be explained below. In FIG. 4, the pressure cylinder 22 shown by a solid line shows the pressure "0". When the switching valve 27 is opened in this state, dam water flows into the working chamber 23 via the pressurizing line 25, and the dam water pressure causes the working chamber 23 to flow into the working chamber 23.
is enlarged as shown by the imaginary line. Then, the antifreeze chamber 24 is reduced in size, and the antifreeze liquid 32 in the antifreeze chamber 24 flows into the water stop rubber 21 via the antifreeze line 31. As a result, the water stop rubber 21 is constantly pressurized by the dam water pressure (maximum 5 kgf/cm ² ). The dam water pressure and the pressure inside the water stop rubber are indicated by the pressure gauges 28, 29, 43, and 44, and if the pressure inside the water stop rubber is insufficient (not sufficient) than the target pressure, first the switching valve 2
7 is moved closed, and the power cylinder 48 is operated. As a result, in the pressurizing cylinder 22, the volume of the working chamber 23 is kept constant, and the antifreeze chamber 2
4 will be compressed, and the antifreeze liquid 32 will flow into the water stopper rubber 21 to make up for the lack of pressure. The power cylinder 48 is operated by a motor 49 when energized, and by the handle 5 during a power outage.
A manual format using 0 is taken. When releasing (depressurizing) the pressure inside the water stop rubber 21, the power cylinder 4 is closed while the switching valve 27 is closed.
When the power cylinder 8 was being operated, the power cylinder 48 is first reversely operated and returned to its original state. Next, the switching valve 45 is opened to reduce the working chamber 23 from the state shown by the virtual line to the state shown by the solid line. This reduction can be achieved by, for example, the elastic restoring force of the bellows forming the antifreeze chamber 24, the dam water pressure applied to the water chamber formed outside the bellows, the elastic restoring force of a separately arranged elastic body such as a spring, or a combination thereof. It is carried out by. As a result, the dam water in the working chamber 23 is discharged into the water channel 47 via the drain line 46,
Furthermore, since the antifreeze chamber 24 is expanded, the antifreeze liquid 32 in the water stopper rubber 21 is returned to the antifreeze chamber 24.

Each of the above-mentioned actions can be performed by remote control, machine-side control, or manual operation, and considering the operability of the gate (computer control), it is possible to pressurize and depressurize reliably in a short time. . Pressurization or depressurization is detected by the stroke of the pressurizing cylinder 22 or the power cylinder 48 and by the pressure switch 24. In addition, the antifreeze liquid 3 in the water stop rubber 21 is
2 are interchangeable.

According to the above-mentioned watertight rubber pressing device of the present invention, the watertight rubber is normally pressurized by applying the dam water pressure to the working chamber of the pressurizing cylinder through the pressurizing line, which causes antifreeze to flow into the watertight rubber through the antifreeze line. Also, when the watertight rubber is not pressurized sufficiently by the dam water pressure, the shortage can be replenished by operating the power cylinder with the switching valve closed. In this case, the power cylinder can be operated by driving when electricity is applied, or manually in the event of a power outage. As a result, the following effects can be expected.

Γ Structure and operation can be relatively simple.

Since a Γ power cylinder is used, the pressure on the pressure cylinder side can be maintained constant for a long time. Moreover, the power cylinder has a built-in brake, so it is non-powered.

Since the Γ power cylinder can be operated manually, the crimping function can be maintained even during a power outage.

Γ Since the antifreeze line and the pressure line are separated, leakage from the antifreeze line can be completely eliminated and the pressure inside the water stop rubber can be maintained for a long time.

Γ Maintenance and inspection can be performed relatively easily.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view showing a general example of a dam, Fig. 2 is an explanatory drawing of a watertight type, Fig. 3 is an explanatory drawing showing a conventional example, and Fig. 4 is an explanatory drawing showing an embodiment of the present invention. be. 20...Dam body, 21...Water stop rubber, 22...Pressure cylinder, 23...Working chamber, 24...Antifreeze chamber, 2
5...Pressure line, 27...Switching valve, 31...Antifreeze line, 32...Antifreeze, 33...Replenishment line, 3
4...Antifreeze supply tank, 48...Power cylinder, 49...Motor, 50...Handle.

Claims (1)

[Scope of utility model registration request] A pressurized cylinder that communicates with the water stop rubber via an antifreeze line is provided, and the working chamber of this pressurized cylinder is communicated with the front of the dam via a pressurized line that has a switching valve, and is interlocked with the pressurized cylinder. A water-stop rubber crimping device for a gate, characterized in that a power cylinder is provided and the power cylinder is configured to be freely switchable between driving and manual operation.