JP2002075139A - Operating apparatus using liquid pressure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operating apparatus using liquid pressure a low cost which has a simple structure and high reliability, and is capable of stable operation. SOLUTION: A bypass flow path 63a is formed in a high-pressure flow path 63 of a liquid pressure monitor 60. The bypass flow path 63a provides a contracted part 73 and a check valve 74, in parallel in which liquid can only flow from an accumulator 400 to a piston 62a. The valve 74 is pushed to a sheet 74b by a spring 74a. A liquid pressure gauge 80 is mounted to a case 61 via a base 81. A scale plate 82, in which an indicating plate 84 mounted via a bearing 83 and capable of freely rotating, is mounted to the base 81. A plate 84a is mounted at one end of the indicating plate 84. A connecting part 84b provided on the plate 84a and a plate 65 mounted to a rod 62 of the monitor 60 are interconnected by a interconnecting bar 85. Furthermore, a testing port 75 is formed in the path 63 of the monitor 60, and a sealant 76 sealing an opening of the port 75 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic operating device for opening and closing a circuit breaker.

[0002]

Recently BACKGROUND OF THE INVENTION power demand is in the increasing tendency, capacity and ultra high pressure of the transmission system is proceeding steadily, SF ₆ as breaker employed in the transmission system in accordance with this
Gas circuit breakers based on gas insulation have become the mainstream. By the way, when performing the opening / closing operation of a circuit breaker, an operating device using a fluid as a drive source is widely known. Among these, in the operating device using gas (compressed air) as the driving source, the driving force becomes extremely large with the increase in the capacity of the power transmission system and the ultra-high pressure, so that the equipment such as the air cylinder and the air tank becomes large. Sometimes. Further, since the air supply / exhaust sound at the time of operation is large, there is a drawback that a silencer is required, and the equipment tends to be complicated.

On the other hand, an operating device using a liquid instead of a gas as a drive source (a so-called hydraulic operating device) has the following advantages. First, liquids can be easily increased in pressure and power as compared with gas, so that the size of the apparatus can be easily reduced. Further, since there is no supply / exhaust sound during operation, noise during operation can be significantly reduced. Further, the responsiveness is excellent due to the incompressibility of the liquid. The hydraulic operating device having the above advantages is regarded as a promising drive source for a circuit breaker having a large capacity and an ultra-high pressure, and further improvement in performance is required.

Here, a conventional example of a hydraulic operating device will be specifically described with reference to FIGS. FIG. 12 is a diagram showing a configuration example of a conventional hydraulic operating device,
FIG. 13 is a view as seen from the arrow Y direction in FIG. 12, and FIG. 14 is a view as seen from the arrow X direction in FIG. FIG.
FIG. 3 is a sectional view of a hydraulic pressure monitor.

[0005] As shown in FIG.
Is composed of a fixed electrode 2 and a movable electrode 3.
Are connected to the drive unit 20 of the hydraulic operating device 10. The drive unit 20 of the hydraulic operating device 10 includes the drive cylinder 2
1 and a drive piston 2 slidably inserted therein
2, and the driving piston 22 and the movable electrode 3 on the circuit breaker side
And a drive rod 23 connecting the two. In the space inside the drive cylinder 21, a first liquid chamber 24 and a second liquid chamber 25 are provided on the drive rod 23 side (the movable electrode 3 side) and the opposite side thereof as partition walls for driving the drive piston 22. Are formed respectively. Also, the second liquid chamber 2
5, a hydraulic pressure control unit 3 via a cylinder block 26.
0 is connected.

The hydraulic pressure control section 30 is a means for selectively supplying and discharging the working fluid (pressure fluid) from and to the second liquid chamber 25 to control the liquid pressure in the second liquid chamber 25. FIG.
As shown in the figure, an electromagnetic valve 301 for controlling the supply and discharge of the hydraulic fluid
And a solenoid 30 for driving the solenoid valve 301.
Two are provided. However, a switching valve may be used as the amplification valve. The fluid pressure control unit 30 and the second fluid chamber 25 are connected by a flow path 27.

On the other hand, the first liquid chamber 24 is provided with the first liquid chamber 2.
An accumulator (pressure accumulator) 400 for constantly applying a high-pressure liquid to 4 is connected via a flow path 401. The accumulator 400 is attached to the cylinder block 26. Also, as shown in FIG.
Is installed. The pump unit 500 is provided to generate high-pressure hydraulic fluid by drainage from the hydraulic pressure control unit 30 and supply the generated hydraulic fluid to the accumulator 400, and is connected to the flow channel 401 via a flow channel 501. . The low-pressure tank 502 is configured to collect the drainage discharged from the second liquid chamber 25 by the hydraulic pressure control unit 30 via the flow path 503 and accumulate the low-pressure hydraulic fluid. .

The hydraulic pressure monitor 60 is a pressure monitoring unit that monitors the hydraulic pressure of the high-pressure liquid in the accumulator 400.
As shown in FIG. 15, it is mounted on the cylinder block 26 via a high-pressure channel 63 and a low-pressure channel 68. That is, in the hydraulic pressure monitor 60, the rod 62 having the piston portion 62a is slidably inserted into the cylinder portion 61a provided in the case 61. Further, a high-pressure channel 63 for taking the high-pressure liquid from the accumulator 400 into the case 61 is provided, and the high-pressure liquid from the accumulator 400 always acts on the piston portion 62a.

The rod 62 is urged by a spring 64 in a direction opposite to the direction in which the piston portion 62a receives the action of the high-pressure liquid. It is designed to be displaced according to the force. The rod 62 has a piston portion 6.
A plate 65 is attached to the end 62b opposite to 2a, and the plate 65 is provided with a plurality of adjustment screws 66. Then, in the vicinity of the adjusting screw 66, the adjusting screw 6
The displacement switch 67 for detecting the displacement of the
1 is attached.

Further, the case 61 includes the high-pressure flow path 6.
3 is formed with a low-pressure channel 68 that can communicate with the third channel 3. In addition,
This low pressure passage 68 is connected to a low pressure tank 502. Further, between the high-pressure channel 63 and the low-pressure channel 68,
A safety valve 69 and a stop valve 70 are provided, and an adjustment screw 72 is attached to the case 61. The adjustment screw 72 is provided with a seat 72 a that contacts the safety valve 69. A gap is provided in the axial direction between the safety valve 69 and the piston portion 62a, and a spring 69a is provided in the gap. And
The safety valve 69 is configured to contact and seal the seat portion 72a of the adjusting screw 72 by the action of the high-pressure liquid guided into the piston 62a from the high-pressure channel 63 and the spring 69a.

When the pressure of the high-pressure liquid flowing through the high-pressure channel 63 exceeds a predetermined set value, the safety valve 69
3 and the low-pressure flow path 68 so that the high-pressure liquid flows through the high-pressure flow path 6.
3 for discharging the gas into the low-pressure channel 68.
Further, the stop valve 70 communicates the high-pressure channel 63 and the low-pressure channel 68 to reduce the pressure of the high-pressure liquid.

As shown in FIG. 12, a pressure gauge 700 is attached to the cylinder block 26 via a flow path 701 so that the fluid pressure in the accumulator 400 can be visually checked. As the pressure gauge 700, a Bourdon tube type is mainly used.

As described above, in the conventional hydraulic operating device, the drive unit 20, the hydraulic control unit 30, the accumulator 40
0, pump unit 500, liquid pressure monitor 60, pressure gauge 7
Since the respective components such as 00 are integrally formed via the cylinder block 26, there is no need to connect the respective components by piping, and miniaturization has been promoted.

[0014]

However, the conventional hydraulic operating device as described above has the following problems. That is, the hydraulic operating device 10 includes the driving unit 20,
The hydraulic pressure control unit 30, the accumulator 400, the pump unit 500, the hydraulic pressure monitor 60, the pressure gauge 700, and the like are integrally formed via the cylinder block 26, and have no piping. Therefore, it is not possible to absorb the steep fluctuation of the hydraulic pressure, and the hydraulic pressure monitor 60 is easily affected by the fluctuation of the hydraulic pressure due to the opening / closing operation of the circuit breaker. If the fluid pressure increases in a surge manner during the closing operation, there is a problem that the displacement switch 67 operates in response to the sharp fluid pressure fluctuation.

An expensive gauge using a Bourdon tube or the like has been used as the pressure gauge 700 for visually checking the hydraulic pressure of the hydraulic pressure operating device 10. However, in a normal circuit breaker operation, the hydraulic pressure is normal. The problem is whether or not the pressure is within a certain range, and it is often not necessary to determine the actual hydraulic pressure. Even in such a case, an expensive pressure gauge is attached, so that there is a problem that the cost increases.

The present invention has been proposed to solve the above-mentioned problems of the prior art, and has as its object the purpose of achieving stable operation with a simple structure, high reliability and low cost. It is to provide a hydraulic operating device.

[0017]

According to one aspect of the present invention, there is provided a hydraulic operating device for opening / closing an open / close portion of a circuit breaker, comprising: a drive cylinder; A drive piston slidably inserted in the drive piston, a drive rod connecting the drive piston and the opening / closing part of the circuit breaker, and a drive rod side in the drive cylinder and an opposite side of the drive piston using the drive piston as a partition. A first liquid chamber and a second liquid chamber formed respectively in the first and second liquid chambers, and a hydraulic pressure control for selectively supplying and discharging the pressurized fluid in the second liquid chamber to control the liquid pressure in the liquid chamber. Part, an accumulator for applying a high-pressure liquid to the first liquid chamber, a movable part displaced by the action of the high-pressure liquid taken from the accumulator through a high-pressure flow path, and detecting a displacement of the movable part. Displacement switch And a low-pressure flow path that can communicate with the high-pressure flow path, and communicates the high-pressure liquid with the high-pressure flow path and the low-pressure flow path when the pressure of the high-pressure liquid flowing through the high-pressure flow path exceeds a predetermined set value. In a hydraulic operating device including a safety valve that discharges from the high-pressure flow path to the low-pressure flow path, and a hydraulic pressure monitor that includes a stop valve that reduces the hydraulic pressure of the high-pressure liquid by communicating the high-pressure flow path and the low-pressure flow path, A throttle in the high-pressure flow path of the hydraulic pressure monitor,
A check valve is provided in parallel with the throttle so that it can flow only from the accumulator to the hydraulic pressure monitor.

According to the first aspect of the present invention having the above-described structure, the hydraulic pressure monitor is provided with a throttle in the high-pressure flow path for taking in the high-pressure liquid from the accumulator. Since it can be absorbed, stable monitoring of the fluid pressure becomes possible. In addition, when the fluid pressure of the accumulator becomes abnormally high, the check valve opens, and the high-pressure fluid from the accumulator can be quickly guided to the safety valve, so that the safety of the fluid pressure operation device can be secured. Also,
Even when the stop valve is opened to lower the liquid pressure of the high-pressure liquid, the check valve is opened, so that the liquid pressure of the high-pressure liquid can be rapidly reduced.

According to a second aspect of the present invention, in the hydraulic operating device according to the first aspect, the throttle is a variable flow rate throttle. According to the invention as set forth in claim 2 having the above-described configuration, a hydraulic pressure monitor capable of absorbing a steep fluctuation with respect to a fluctuation of each hydraulic pressure in various devices with the same structure is provided. Since the components can be shared, the cost can be reduced.

According to a third aspect of the present invention, in the hydraulic operating device according to the first or second aspect, the throttle provided in the high-pressure flow path and the check valve are integrally formed. It is a feature. According to the third aspect of the present invention having the above configuration, the size of the device can be reduced by integrating the check valve and the throttle. Also,
Minimizing the processing of complicated flow paths can contribute to cost reduction.

According to a fourth aspect of the present invention, there is provided a hydraulic operating device for opening / closing an open / close portion of a circuit breaker, comprising: a drive cylinder; a drive piston slidably inserted in the drive cylinder; A drive rod for connecting the drive piston to the open / close portion of the circuit breaker; a first liquid chamber and a first liquid chamber formed on the drive rod side and the opposite side in the drive cylinder, respectively, using the drive piston as a partition. 2 liquid chambers,
A hydraulic pressure control unit that selectively performs supply and discharge of the pressure fluid in the second liquid chamber to control the liquid pressure in the liquid chamber, and an accumulator that causes a high-pressure liquid to act on the first liquid chamber. A case having a cylinder portion, a high-pressure flow path for taking the high-pressure liquid from the accumulator into the case, and a piston portion slidably inserted into the cylinder portion of the case and receiving the action of the high-pressure liquid from the accumulator. A hydraulic pressure monitor including a rod, a spring for urging the rod in a direction opposite to a direction in which the piston receives the action of the high-pressure liquid, and a displacement switch for detecting the displacement of the rod. In a hydraulic operating device, a scale plate having a scale indicating a normal range of hydraulic pressure, an indicator plate rotatably mounted on the scale plate via a bearing, and one end of the indicator plate. A hydraulic gauge including a plate attached thereto, a connecting portion provided on the plate, and a connecting member connecting the connecting portion and the rod of the hydraulic pressure monitor. is there.

According to the fourth aspect of the present invention having the above-described structure, by utilizing the displacement of the rod of the hydraulic pressure monitor, the state of the hydraulic pressure can be confirmed with a simple structure using a small number of parts. This eliminates the need for an expensive pressure gauge and contributes to cost reduction.

According to a fifth aspect of the present invention, in the hydraulic operating device according to the fourth aspect, two or more connecting portions are provided at predetermined intervals on a plate attached to the indicator plate of the hydraulic pressure gauge. It is characterized by having. According to the invention as set forth in claim 5 having the above-mentioned configuration, the direction of the hydraulic pressure gauge can be freely changed without changing the structure, regardless of whether the hydraulic operating device is used vertically or horizontally. Thus, the visibility of the hydraulic pressure gauge is improved, and a versatile hydraulic pressure gauge that can be installed anywhere can be provided.

According to a sixth aspect of the present invention, in the hydraulic operating device according to the fourth or fifth aspect, at least two or more indicator portions provided on the scale of the hydraulic pressure gauge and the indicator plate are provided. It is characterized by having.
According to the invention as set forth in claim 6 having the above-described configuration, the hydraulic pressure gauge can be viewed from various angles, so that the visibility of the hydraulic pressure gauge is improved, and the hydraulic pressure gauge can be installed anywhere. It can be a fluid pressure gauge with a characteristic.

According to a seventh aspect of the present invention, in the hydraulic operating device according to any one of the fourth to sixth aspects, in the hydraulic pressure gauge, the connecting member comprises a wire, A spring for pulling or pressing the wire in a direction opposite to the pulling direction of the wire. According to the invention as set forth in claim 7 having the above configuration, the position of the hydraulic pressure gauge with respect to the scale of the indicator plate can be easily finely adjusted by adjusting the length of the wire. , Greatly improves workability.

According to an eighth aspect of the present invention, in the hydraulic operating device according to any one of the fourth to sixth aspects, in the hydraulic pressure gauge, the connecting member comprises a first spring; A second spring for pulling or pressing the indicator plate in a direction opposite to the tension direction of the first spring is provided, and a stopper is provided so that the indicator plate cannot rotate below the origin of the scale provided on the scale plate. It is characterized by having been provided. According to the invention described in claim 8 having the above-described configuration, even if the rod of the hydraulic pressure monitor slightly vibrates due to the pulsation of the hydraulic pressure or the like, the first spring cushions the rod.
Since the vibration of the rod is not transmitted to the indicator plate of the hydraulic pressure gauge, the visibility of the indicator plate is greatly improved.

According to a ninth aspect of the present invention, in the hydraulic operating device according to the fourth or fifth aspect, in the hydraulic pressure gauge, the connecting member is formed of a connecting rod, and an indicator plate of the connecting rod is provided. A rack provided at an end of the indicator plate, a plate provided at an end of the indicating plate is configured as a pinion gear so as to mesh with the rack, a sliding portion is provided on the connecting rod, and the connecting rod is provided on the scale plate. And a guide portion slidably engaged with the sliding portion. According to the ninth aspect of the present invention having the above configuration, the linear displacement of the rod due to the fluctuation of the hydraulic pressure of the hydraulic operating device can be accurately converted to the circular motion of the indicator plate. A highly accurate hydraulic pressure gauge can be provided.

According to a tenth aspect of the present invention, in the hydraulic operating device according to any one of the first to ninth aspects,
A test port formed by being connected to a high-pressure flow path of the hydraulic pressure monitor, and a seal material for sealing the test port are provided. According to the invention according to claim 10 having the above-described configuration, when it is necessary to measure the hydraulic pressure of the hydraulic operating device, a pressure gauge can be easily connected to the test port to easily measure the hydraulic pressure. Measurement of hydraulic pressure becomes possible.

According to an eleventh aspect of the present invention, in the hydraulic operating device according to the tenth aspect, the test port communicates or seals the test port with the high-pressure flow path.
A stop valve for selecting whether or not to supply a high-pressure liquid to a test port is provided. According to the invention according to claim 11 having the above-described configuration, when a pressure gauge for measuring the liquid pressure of the high-pressure liquid of the liquid pressure operation device is connected, the stop valve is operated to reduce the liquid pressure. Since it is possible to attach and detach the pressure gauge while maintaining the high pressure, the workability is greatly improved.

According to a twelfth aspect of the present invention, in the hydraulic operating device according to the tenth aspect, a throttle having a predetermined flow rate is provided in the test port. According to the twelfth aspect of the present invention having the above-described configuration, if the hydraulic pressure is reduced, the test port is provided with a restrictor even if the sealing material that seals the test port is removed. Since this throttle has only a small flow rate,
Only a little liquid seeps out. Therefore, when connecting a pressure gauge for measuring the hydraulic pressure, there is no need to extract the hydraulic fluid from the low-pressure tank, and the high-pressure flow path and the low-pressure flow path are connected to reduce the hydraulic pressure and seal material for sealing the test port. By simply removing the pressure gauge, the pressure gauge can be mounted and removed, and the workability is improved with an inexpensive structure.

According to a thirteenth aspect of the present invention, there is provided a hydraulic pressure monitor according to any one of the first to third aspects.
A liquid pressure gauge according to any one of claims 12 to 12 is attached to form an integral structure. According to the thirteenth aspect of the present invention having the above configuration, the diaphragm provided in the hydraulic pressure monitor can prevent vibration of the hydraulic pressure gauge due to a sharp change in hydraulic pressure. By integrating the pressure gauge, the device can be reduced in size and integrated.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment (hereinafter, referred to as an embodiment) of a hydraulic operating device according to the present invention will be described with reference to FIG.
This will be specifically described with reference to FIGS. FIG.
The same members as those of the conventional type shown in FIG. 15 are denoted by the same reference numerals, and description thereof will be omitted. Further, the configuration of the open / close portion of the circuit breaker is an example, and it is sufficient that the opposing electrodes can be opened and closed relatively, and a configuration in which the two opposing electrodes move together may be used. Furthermore, the overall configuration of the hydraulic operating device is an example, and is not particularly limited to this configuration.

(1) First Embodiment (Structure) FIGS. 1 and 2 show the structure of a first embodiment of a hydraulic operating device according to the present invention. FIG. 1 is a partial sectional view, and FIG. 2 is an arrow view seen from the arrow Y direction in FIG. That is, in the present embodiment, as shown in FIG.
The high pressure passage 63 of the hydraulic pressure monitor 60 has a bypass passage 63a.
Is formed, and a throttle 73 is provided in the bypass channel 63a. The high-pressure channel 63 is provided with the throttle 73.
In parallel with the piston 62a from the accumulator 400 side.
A check valve 74 that can only flow to the side is provided, and a spring 74a
Is configured to be pressed by the sheet portion 74b. The configuration of the other parts of the hydraulic pressure monitor 60 is the same as that shown in FIG.
The description is omitted because it is the same as the conventional type shown in FIG.

In this embodiment, as shown in FIGS. 1 and 2, a hydraulic pressure gauge 80 is attached to the case 61 via a base 81. A scale plate 82 is attached to the base 81, and an indicator plate 84 is rotatably attached to the scale plate 82 via a bearing 83. Further, a plate 84a is attached to one end of the indicator plate 84, and a connecting portion 84b provided on the plate 84a is connected to a plate 65 attached to the rod 62 of the hydraulic pressure monitor 60 by a connecting rod 85. ing. Note that a transparent cover 86 is attached to the scale plate 82 so as to cover the indicating plate 84. Further, a test port 75 is formed in the high-pressure channel 63 of the hydraulic pressure monitor 60 so as to be connected thereto, and the test port 75 is guided to the outside of the case. The test port 75 is provided with a seal member 76 for sealing the opening.

(Operation / Effect) The hydraulic operating device of the present embodiment configured as described above operates as follows. That is, in the hydraulic pressure monitor 60, the piston portion 62a
The hydraulic pressure in the liquid storage chamber of the accumulator 400 can be constantly monitored based on the displacement amount of the spring and the load characteristics of the spring 64. More specifically, when the liquid pressure in the liquid storage chamber decreases and falls below a specified value, the displacement switch 67 is operated, and a signal to the liquid pressure control unit 30 is transmitted by the displacement switch 67,
Operation and stop control of the pump unit 500 can be performed.

That is, when the liquid pressure in the liquid storage chamber of the accumulator 400 drops, the check valve 74 provided in the high-pressure channel 63 closes the high-pressure channel 63 due to the difference in hydraulic pressure and the pressing force of the spring 74a. In order to stop the operation, the hydraulic pressure acting on the piston portion 62a gradually decreases through the throttle 73 of the bypass passage 63a. As a result, even if the fluid pressure drops in a surge manner due to the opening / closing operation of the circuit breaker, etc.
3, the hydraulic pressure of the piston portion 62a is stabilized, and it is possible to prevent the displacement switch 67 from malfunctioning due to this surge-like drop.

On the other hand, if the fluid pressure rises abnormally for some reason, the check valve 74 will be in a communicating state and the high pressure fluid can be led to the safety valve 69 promptly, so that the fluid pressure rise is suppressed. Can be. Also, when the stop valve 70 is opened to connect the high-pressure channel 63 and the low-pressure channel 68 to reduce the pressure of the high-pressure liquid, the check valve 74 is also opened.
The pressure of the high-pressure liquid can be promptly reduced.

In the hydraulic pressure gauge section 80, FIG.
As shown in (1), as the rod 62 of the hydraulic pressure monitor 60 is displaced due to the fluctuation of the hydraulic pressure, the connecting plate 85 rotates the indicating plate 84, and the indicating unit provided on the indicating plate 84 changes the state of the hydraulic pressure. An indication can be given on the scale plate 82 by 84c. The scale plate 82 is provided with a scale 82a indicating a normal range of the hydraulic pressure. Therefore, in the present embodiment, whether or not the hydraulic pressure is in a normal state can be easily visually confirmed.

When it is necessary to accurately measure the liquid pressure of the high-pressure liquid, the sealing material 76 of the test port 75 is removed, and a predetermined pressure gauge is connected to the opening thereof. The pressure can be easily measured.
Furthermore, by combining these, it is possible to provide a hydraulic pressure monitor and a hydraulic pressure gauge that operate stably,
Equipment can be reduced in size and integrated.

(2) Second Embodiment This embodiment is a modification of the first embodiment. That is, in the present embodiment, as shown in FIG.
Is provided, so that the flow rate of the high-pressure liquid on the accumulator 400 side and the piston part 62a side can be adjusted. In the hydraulic operating device of the present embodiment configured as described above, it is possible to cope with various devices having different aspects of the hydraulic pressure with the same structure, so that the components can be shared.

(3) Third Embodiment This embodiment is a modification of the first embodiment. That is, in the present embodiment, as shown in FIG. 4, a check valve 78 that can flow only from the accumulator 400 side to the piston portion 62 a side is provided in the high-pressure channel 63 of the hydraulic pressure monitor 60. Throttle passage 7 in check valve 78
8a is provided, and the seat portion 74 is provided by a spring 74a.
b. In the hydraulic operating device of the present embodiment configured as described above, the size of the device can be reduced. Further, minimizing the processing of the complicated flow path can contribute to cost reduction.

(4) Fourth Embodiment This embodiment is a modification of the hydraulic pressure gauge section shown in the first embodiment. That is, in the present embodiment, as shown in FIG. 5, the plate 84a attached to the indicator plate 84 of the hydraulic pressure gauge section 80 is provided at two intervals of about 90 degrees.
There are provided coupling portions 84b. In the hydraulic operating device of the present embodiment configured as described above, regardless of whether the hydraulic operating device 10 is used vertically or horizontally, the direction of the hydraulic pressure gauge 80 can be freely changed without changing the structure. Can be changed to Thereby, the visibility of the hydraulic pressure gauge 80 is improved, and a versatile hydraulic pressure gauge that can be installed anywhere can be provided.

(5) Fifth Embodiment This embodiment is a modification of the hydraulic pressure gauge section shown in the first embodiment. That is, in the present embodiment, as shown in FIG. 6, the scales 82 are provided not only on the upper surface of the scale plate 82 of the hydraulic pressure gauge portion 80 but also on the side surfaces 82b.
c is provided. Also, the scale 82c of the side surface 82b
In order to cope with the above, the indicator 84d is provided with an indicator 84d. In the hydraulic operating device of the present embodiment configured as described above, the hydraulic pressure gauge can be viewed from various angles, so that the visibility of the hydraulic pressure gauge is improved, and the hydraulic pressure gauge can be installed anywhere. It can be a fluid pressure gauge with a characteristic.

(6) Sixth Embodiment This embodiment is a modification of the hydraulic pressure gauge section shown in the first embodiment. That is, in the present embodiment, as shown in FIG. 7, the indication plate 84 of the hydraulic pressure gauge unit 80 and the rod 62 are connected by the wire 87. Further, a spring 88 is provided so as to always pull the indicating plate 84 in a direction opposite to the pulling direction of the wire 87. One end of the spring 88 is fixed to the plate 84a, and the other end is fixed to the scale plate 82. I have.

In the hydraulic operating device of the present embodiment configured as described above, the position of the hydraulic pressure gauge 80 with respect to the scale 82a of the indicating plate 84 is easily finely adjusted by adjusting the length of the wire 87. It is possible to do
The workability is improved, and the weight can be reduced.

(7) Seventh Embodiment This embodiment is a modification of the hydraulic pressure gauge section shown in the first embodiment. That is, in the present embodiment, as shown in FIG. 8, the indication plate 84 of the hydraulic pressure gauge unit 80 and the rod 62 are connected by the first spring 89. Further, the second spring 9 is pulled so that the indicating plate 84 is always pulled in the direction opposite to the direction in which the first spring 89 is pulled.
0, and one end of the second spring 90 is connected to the plate 84a.
, And the other end is fixed to a scale plate 82. An indicator plate 84 is provided on a scale 82 provided on the scale plate 82.
A stopper 91 is provided to prevent rotation below the origin of a.

In the hydraulic operating device of the present embodiment configured as described above, even if the rod 62 of the hydraulic monitor 80 slightly vibrates due to the pulsation of the hydraulic pressure or the like, the buffering action of the first spring 89 is achieved. Accordingly, the vibration of the rod 62 is not transmitted to the indicator plate 84 of the hydraulic pressure gauge 80, and the visibility of the indicator plate 84 is improved.

(8) Eighth Embodiment This embodiment is a modification of the hydraulic pressure gauge section shown in the first embodiment. That is, in the present embodiment, as shown in FIG. 9, a rack 85 a is formed at an end of the connecting rod 85 connecting the indicating plate 84 of the hydraulic pressure gauge section 80 and the rod 62 on the indicating plate 84 side. Have been. A pinion gear 84 e is formed on the plate 84 a of the indicating plate 84, and is arranged so as to mesh with the rack 85 a of the connecting rod 85. Further, the connecting rod 85 has a sliding portion 85b.
The scale plate 82 is provided with a guide 82d so as to fit and slide with the sliding portion 85b.

In the hydraulic operating device of the present embodiment configured as described above, the linear displacement of the rod 62 due to the fluctuation of the hydraulic pressure can be accurately converted into the circular motion of the indicating plate 84. A highly accurate hydraulic pressure gauge can be provided.

(9) Ninth Embodiment This embodiment is a modification of the test port shown in the third embodiment. That is, in the present embodiment, as shown in FIG. 10, the stop valve 92 is provided at the test port 75 connected to the high-pressure channel 63 of the hydraulic pressure monitor 60. The stop valve 92 can communicate or seal the test port 75 with the high-pressure channel 63, and is configured to select whether or not to supply the high-pressure liquid to the test port 75. ing.

In the hydraulic operating device of the present embodiment configured as described above, when a pressure gauge for measuring the hydraulic pressure of the high-pressure liquid of the hydraulic operating device is connected, even if the hydraulic pressure is maintained at a high pressure, After closing the stop valve 90 and depressurizing the test port 75 side, the sealing material 76 can be removed and a pressure gauge can be connected, and then the stop valve 90 is opened to measure the hydraulic pressure. Can be. On the other hand, when removing the pressure gauge, it is possible to work while maintaining the liquid pressure at a high pressure by performing the procedure in the reverse order of the mounting. As described above, in the present embodiment, since the pressure gauge can be attached and detached while maintaining the liquid pressure at a high pressure, workability is greatly improved.

(10) Tenth Embodiment This embodiment is a modification of the test port shown in the first embodiment. That is, in the present embodiment, as shown in FIG. 11, the test port 75 connected to the high-pressure channel 63 of the hydraulic pressure monitor 60 is provided with the throttle 75a having a small flow rate.

In the hydraulic operating device of the present embodiment configured as described above, the test port 75 is provided with the throttle 75a, and since the throttle 75a has only a small flow rate, the hydraulic pressure is reduced. Then, even if the seal member 76 sealing the test port 75 is removed, very little liquid seeps out. Therefore, when connecting a pressure gauge for measuring the fluid pressure, there is no need to extract the hydraulic fluid from the low-pressure tank 502, and the high-pressure channel 63 and the low-pressure channel 68 are communicated to lower the fluid pressure, and the test port 75 is sealed. By simply removing the sealing material 76 that stops, the mounting and removal of the pressure gauge becomes possible.
Workability is greatly improved.

[0054]

As described above, according to the present invention,
It is possible to provide a highly reliable and inexpensive hydraulic operating device which has a simple structure and can operate stably. That is,
According to the first to third aspects of the present invention, a throttle and a check valve are provided in the high-pressure flow path for taking the high-pressure liquid into the hydraulic pressure monitor, so that a malfunction does not occur even when a steep change in the hydraulic pressure occurs. It is possible to provide a hydraulic operating device including a highly reliable hydraulic pressure monitor.

Further, in the invention according to claims 4 to 9,
By adopting a simple structure using the displacement of the rod of the hydraulic pressure monitor as the hydraulic pressure gauge, it is possible to adopt a structure that does not select the mounting direction, and it is equipped with an inexpensive and highly visible hydraulic pressure gauge. A pressure manipulating mechanism can be provided.

Further, in the inventions according to the tenth to twelfth aspects, the test port connected to the high pressure flow path of the hydraulic pressure monitor is provided, so that a pressure gauge or the like can be easily attached, and the hydraulic pressure gauge and In combination, an inexpensive hydraulic operating mechanism with good workability can be provided. Also, in the invention of claim 13, the invention of claims 1 to 12 is integrally formed, and a small, inexpensive and highly reliable hydraulic operating device can be provided.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing the configuration of a first embodiment of a hydraulic operating device according to the present invention.

FIG. 2 is a view taken in the direction of the arrow Y in FIG. 1;

FIG. 3 is a sectional view showing a configuration of a second embodiment of the hydraulic operating device according to the present invention.

FIG. 4 is a sectional view showing the configuration of a third embodiment of the hydraulic operating device according to the present invention.

FIG. 5 is a sectional view showing a configuration of a fourth embodiment of a hydraulic operating device according to the present invention.

FIG. 6 is a sectional view showing a configuration of a fifth embodiment of a hydraulic operating device according to the present invention.

FIG. 7 is a sectional view showing a configuration of a sixth embodiment of the hydraulic operating device according to the present invention.

FIG. 8 is a sectional view showing a configuration of a seventh embodiment of a hydraulic operating device according to the present invention.

FIG. 9 is a sectional view showing the configuration of an eighth embodiment of the hydraulic operating device according to the present invention.

FIG. 10 is a sectional view showing the configuration of a ninth embodiment of a hydraulic operating device according to the present invention.

FIG. 11 is a sectional view showing a configuration of a hydraulic operating device according to a tenth embodiment of the present invention.

FIG. 12 is a sectional view showing an example of a conventional hydraulic operating device.

13 is a view taken in the direction of the arrow Y in FIG.

14 is a view taken in the direction of the arrow X in FIG. 12;

FIG. 15 is a cross-sectional view showing a configuration of a hydraulic pressure monitor portion of a conventional hydraulic pressure operating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Hydraulic operation device 20 ... Driving part 21 ... Driving cylinder 22 ... Driving piston 23 ... Driving rod 24 ... First liquid chamber 25 ... Second liquid chamber 26 ... Cylinder block 27 ... Flow path 30 ... Hydraulic pressure control part 301 ... solenoid valve 302 ... solenoid 400 ... accumulator 401 ... flow path 500 ... pump unit 501, 503 ... flow path 502 ... low pressure tank 700 ... pressure gauge 701 ... flow path 60 ... liquid pressure monitor 61 ... case 61a ... cylinder part 62 ... Rod 62a ... Piston part 62b ... Rod end 63 ... High pressure passage 64 ... Spring 65 ... Plate 66 ... Adjustment screw 67 ... Displacement switch 68 ... Low pressure passage 69 ... Safety valve 69a ... Spring 70 ... Stop valve 72 ... Adjustment screw 72a ... Adjustment screw seat part 73 ... throttle 74 ... check valve 74a ... spring 74b ... seat part 75 ... test port 75a ... throttle 76 ... Seal material 77 ... Throttle valve 78 ... Check valve 78a ... Throttle passage 80 ... Hydraulic pressure gauge 81 ... Base 82 ... Scale plate 82a, 82c ... Scale 82b ... Scale plate side surface 82d ... Guide 83 ... Bearing 84 ... Indicating plate 84a ... plate 84b ... connecting part 84c, 84d ... indicating part 84e ... pinion gear 85 ... connecting rod 85a ... rack 85b ... sliding part 86 ... cover 87 ... wire 88 ... spring 89 ... first spring 90 ... second spring 91: Stopper 92: Stop valve

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Goichi Iwata 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Fumio Nakajima 2nd Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1 Inside Toshiba Hamakawasaki Plant (72) Inventor Hirokazu Takagi 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Hamakawasaki Plant, Toshiba

Claims (13)

[Claims] 1. A hydraulic operating device for opening and closing an open / close portion of a circuit breaker, comprising: a drive cylinder, a drive piston slidably inserted into the drive cylinder, the drive piston and the circuit breaker. A drive rod for connecting the opening and closing part of the drive cylinder, a first liquid chamber and a second liquid chamber respectively formed on the drive rod side and the opposite side in the drive cylinder using the drive piston as a partition, A fluid pressure control unit that selectively performs supply and discharge of the pressure fluid in the second fluid chamber to control the fluid pressure in the fluid chamber; and an accumulator that causes the high pressure fluid to act on the first fluid chamber. A movable portion that is displaced by the action of the high-pressure liquid taken in from the accumulator through the high-pressure channel, a displacement switch that detects the displacement of the movable portion, a low-pressure channel that can communicate with the high-pressure channel, Flowing through the channel A safety valve that connects the high-pressure flow path and the low-pressure flow path when the pressure of the high-pressure liquid exceeds a predetermined set value and discharges the high-pressure liquid from the high-pressure flow path to the low-pressure flow path; A hydraulic pressure control device comprising a hydraulic pressure monitor comprising a stop valve for lowering the hydraulic pressure of the high-pressure liquid by communicating with a throttle, a throttle, a high-pressure flow path of the hydraulic pressure monitor, and the accumulator in parallel with the throttle. A hydraulic operating device comprising a check valve that can only flow on the hydraulic pressure monitor side. 2. The hydraulic operating device according to claim 1, wherein the restrictor is a variable flow restrictor. 3. The hydraulic operating device according to claim 1, wherein the throttle and the check valve provided in the high-pressure flow path are integrally formed. 4. A hydraulic operating device for opening and closing an open / close portion of a circuit breaker, comprising: a drive cylinder; a drive piston slidably inserted into the drive cylinder; A drive rod for connecting the opening and closing part of the drive cylinder, a first liquid chamber and a second liquid chamber respectively formed on the drive rod side and the opposite side in the drive cylinder using the drive piston as a partition, A fluid pressure control unit that selectively performs supply and discharge of the pressure fluid in the second fluid chamber to control the fluid pressure in the fluid chamber; and an accumulator that causes the high pressure fluid to act on the first fluid chamber. A case having a cylinder portion, a high-pressure flow path for taking the high-pressure liquid from the accumulator into the case, and a piston slidably inserted into the cylinder portion of the case and receiving the action of the high-pressure liquid from the accumulator. A hydraulic pressure monitor including a rod having a ton portion, a spring for urging the rod in a direction opposite to a direction in which the piston receives the action of the high-pressure liquid, and a displacement switch for detecting a displacement of the rod. In the hydraulic operating device provided, a scale plate having a scale indicating a normal hydraulic pressure range, an indicator plate rotatably attached to the scale plate via a bearing, and one end of the indicator plate A hydraulic pressure gauge comprising a plate, a connecting portion provided on the plate, and a connecting member for connecting the connecting portion and the rod of the hydraulic pressure monitor. . 5. The hydraulic operating device according to claim 4, wherein two or more connecting portions are provided at predetermined intervals on a plate attached to the indicating plate of the hydraulic pressure gauge. 6. The hydraulic operating device according to claim 4, wherein at least two or more indicating portions provided on the scale of the hydraulic pressure gauge and the indicating plate are provided. 7. The hydraulic pressure gauge according to claim 4, wherein the connecting member is formed of a wire, and a spring is provided for pulling or pressing the indicating plate in a direction opposite to a direction in which the wire is pulled. The hydraulic operating device according to claim 6. 8. The hydraulic pressure gauge, wherein the connecting member is formed of a first spring, and a second spring is provided for pulling or pressing the indicating plate in a direction opposite to a direction in which the first spring is pulled. 7. The hydraulic operating device according to claim 4, wherein a stopper is provided so that the indication plate cannot be rotated below the origin of a scale provided on the scale plate. 9. The hydraulic pressure gauge, wherein the connecting member comprises a connecting rod, a rack is formed at an end of the connecting rod on the indicator plate side, and a plate provided at an end of the indicator plate is a pinion gear. The sliding bar is provided on the connecting rod, and a guide portion is provided on the scale plate so as to slidably engage with the sliding portion of the connecting rod. The hydraulic operating device according to claim 4 or 5. 10. The test apparatus according to claim 1, further comprising: a test port formed to be connected to a high-pressure flow path of the hydraulic pressure monitor, and a sealing material for sealing the test port. The hydraulic operating device according to any one of the preceding claims. 11. The test port is provided with a stop valve for communicating or sealing the test port with the high-pressure flow path and selecting whether or not to supply a high-pressure liquid to the test port. The hydraulic operating device according to claim 10. 12. The hydraulic operating device according to claim 10, wherein a throttle having a predetermined flow rate is provided in the test port. 13. A hydraulic pressure monitor according to claim 1, wherein the hydraulic pressure gauge according to claim 4 is attached to the hydraulic pressure monitor according to claim 1. Characteristic hydraulic operating device.