JP2002237237A - Composite type hydraulic driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite type hydraulic driving device, easy to assemble, operate and inspect, and capable of making a switching device itself compact, and also to intend to miniaturize and integrate the device while securing its high operational reliability. SOLUTION: A hydraulic operating device 13 is disposed in a mechanism box 12 disposed at the lower end part of a supportive porcelain tube 11. Insulating operational rods 14, 14a, 14b are stored in the supportive porcelain tube 11, and connecting mechanism parts 15, 15a, 15b are provided in a metallic container 3. Respective contacts 6, 8a, 8b of a breaker 5 and disconnectors 7a, 7b are connected to the hydraulic operating device 13 through the connecting mechanism parts 15, 15a, 15b and the insulating operational rods 14, 14a, 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic drive for opening and closing the contacts of a gas insulated switchgear, and more particularly to a combined hydraulic drive for driving a circuit breaker and a disconnector.

[0002]

2. Description of the Related Art In recent years, gas-insulated switchgear, which has become the mainstream of power switchgear, is a device in which a number of switches are arranged in a container filled with an insulating gas, and a switch between the circuit breaker and the main bus. Various types have been proposed, such as a gas-insulated disconnector installed between a circuit breaker and a transmission line.

As a typical conventional example of a gas insulated switchgear, a disconnecting portion of a gas insulated switchgear described in US Pat. No. 5,841,087 is shown in FIG. 14 and FIG.
This will be specifically described with reference to FIG. FIG. 14 is a front sectional view of a conventional gas insulated disconnector, and FIG. 15 is a side sectional view taken along line BB of FIG.

[0004] As shown in FIG. 14, a disconnector 200 is provided with a grounded metal container 2 filled with an insulating gas such as SF6 gas.
01. The first mounting flange 203 and the second mounting flange 20
The first fixed electrode 205 is fixed to the first mounting flange 203 via an insulating spacer. Further, the second fixed electrode 206 is similarly fixed to the second mounting flange 204. That is, these fixed electrodes 205 and 206 are connected to the grounded metal container 201.
It is fixed in a state insulated from.

As shown in FIG. 15, a third mounting flange 208 is formed below the grounded metal container 201, and a fourth mounting flange 209 is formed on the side surface of the grounded metal container 201. I have. A third fixed electrode 210 that is electrically connected to the ground metal container 201 is fixed to the third mounting flange 208.
9 is provided with a metal lid 211. Lid 211
, A hollow insulating cylinder 212 extending toward the inside of the grounded metal container 201 is fixed, and a drive shaft 213 is passed through a hollow portion of the insulating cylinder 212. The drive shaft 213 extends from the outside of the grounded metal container 201 toward the inside of the grounded metal container 201, and penetrates the lid 211 while keeping the insulating gas airtight.

In FIG. 14 and FIG. 15, a cylindrical first
The movable electrode 215, the second movable electrode 216, and the third movable electrode 217 form a pair between the first fixed electrode 205, the second fixed electrode 206, and the third fixed electrode 210, respectively. , A first contact 218, a second contact 219, and a third contact 220. The movable electrodes 215, 216, and 217 are electrically and electrically connected to the current terminal 223 by a sliding contact (not shown) and a sleeve-shaped metal container 222.

The current terminal 223 is connected to another device, for example, a circuit breaker. The conductor of the main bus is ground metal container 2
01, that is, the first fixed electrode 205 and the second fixed electrode 206 can be connected to each other. Therefore, the first contact 218 and the second
Contact 219 serves as a main bus selection disconnector. Further, since the third fixed electrode 210 short-circuited with the ground metal container 201 is at the ground potential, the third contact 220 serves as a grounding device.

By the way, in the metal container 222, the contact 2
Opening / closing mechanism 22 for opening and closing 18, 219, 220
5 are stored. The opening and closing mechanism 225 includes a first cam 226 connected to the first movable electrode 215 and a first lever 22 disposed to sandwich the first cam 226 therebetween.
7, a second lever 228, a third cam 231 connected to the second movable electrode 216, and a third lever 231 and a fourth lever 232 arranged so as to sandwich the second cam 230. A third cam 233 connected to the third movable electrode 217 and a fifth lever 234 and a sixth lever 235 disposed so as to sandwich the third cam 233 are provided.

The opening / closing mechanism of the opening / closing mechanism 225 has three
Two movable electrodes, a first movable electrode 215 and a second movable electrode.
By driving the movable electrode 216 and the third movable electrode 217 to separate the first fixed electrode 205, the second fixed electrode 206, and the third fixed electrode 210 that form a pair, respectively, The first contact 218, the second contact 219, and the third contact 220 are opened and closed.

The first movable electrode 215 has a first cam 2
A first lever 227 and a second lever 228 provided in pairs with respect to the first cam 226 convert the rotational motion of the drive shaft 213 into a reciprocating motion. The drive shaft 21 at different angles from each other.
It is fixed to 3. Further, a pin is provided at the tip of each of the levers 227 and 228 provided on the first cam 226. An arc-shaped groove is formed on both surfaces of the first cam 226, and the levers 227 and 22 are formed in this groove.
8 A pin at the tip is slidably inserted.

The first cam 22 constructed as described above
Reference numeral 6 realizes a cam mechanism that converts the rotational driving force of the drive shaft 213 into a linear reciprocating motion, converts the rotational driving force of the drive shaft 213 into a linear reciprocating motion, and transmits the linear driving force to the first movable electrode 215. First movable electrode 215 to which rotational driving force has been transmitted
Performs a linear reciprocating motion to open and close the first contact point 218.

The first cam 226 is formed with an elongated hole 236 (shown in FIG. 14) having a width enough to allow the drive shaft 213 to pass through. By passing the drive shaft 213 through the elongated hole 236, the first cam 226 serves as a fulcrum for a linear reciprocating motion.

On the other hand, the second movable electrode 216 and the third movable electrode 217 also correspond to the first movable electrode 21 described above.
The cam mechanism similar to that in the case of No. 5 is provided, and the same linear reciprocating motion is performed.

The opening / closing mechanism 225 is moved from an operating mechanism (not shown) disposed on a portion of the drive shaft 213 of the disconnector 200 extending to the outside of the grounded metal container 201.
The driving force is transmitted to the driving shaft 213, and the driving shaft 213 is driven to rotate. A drive device for opening and closing the first contact 218, the second contact 219, and the third contact 220 is constituted by the operating mechanism and the opening / closing mechanism 225.

In the conventional driving device, a driving device including an operating mechanism and an opening / closing mechanism 225 is provided independently, and the first contact 218 is operated by the operation of each driving device.
And the second contact 219 and the third contact 220 are driven to open and close. That is, when the operating mechanism is driven, the drive shaft 213 of the opening / closing mechanism 225 is rotated by receiving the driving force, and accordingly, the first lever 227 to the sixth lever 235 are rotated.

The pins at the distal ends of the rotating first lever 227 and the second lever 228 are connected to the first cam 226.
Move along the cam groove. Similarly, the third rotating
The pin at the tip of the lever 231 and the fourth lever 232 is along the cam groove of the second cam 230, and the pin at the tip of the rotating fifth lever 231 and the sixth lever 232 is the third. Move along the cam groove of the cam 233.

The interaction between the first to sixth levers 227 to 235 and the first to third cams 226 to 233 converts the rotational motion of the drive shaft 213 into a linear reciprocating motion. The converted rotational driving force of the drive shaft 213 is transmitted to the first movable electrode 215, the second movable electrode 216, and the third movable electrode 217.

The transmitted force causes the first movable electrode 215 to move in the axial direction, thereby driving the first contact 218 to open and close. Similarly, the second movable electrode 216
Performs the opening and closing drive of the second contact 219, and the third movable electrode 217 performs the opening and closing drive of the third contact 220.

[0019]

In the conventional driving device, the opening / closing mechanism 225 provided in the disconnecting switch has been described. However, the driving device is indispensable for a circuit breaker outside the drawing. Therefore, it is necessary to separately arrange independent driving devices for each contact point of disconnecting devices and circuit breaker devices, and the driving devices have been increased in size. For this reason, the gas insulated switchgear must also be increased in size. Specifically, in the opening / closing mechanism 225, one cam and two levers are required for one movable electrode, and the number of parts increases.
As the number of parts increases, the structure becomes more complicated and the manufacturing and assembly costs increase, which is economically disadvantageous.

Further, the large number of parts complicates the device configuration and increases the space for accommodating the opening / closing mechanism 225. That is, the size of the metal container 222 for accommodating the opening / closing mechanism 225 and the grounded metal container 201 of the disconnector 200 are increased, and the size of the driving device and the gas insulated switching device is increased.
Increasing the size of the device increases the cost accordingly, and is economically disadvantageous.

Further, in a driving device, it is extremely important to ensure operation reliability, and it is required to assemble a complicated device with high accuracy in order to ensure operation reliability. However, the complexity of the device configuration due to the large number of parts complicates the assembling work in assembling the drive device, and lowers the working efficiency. On the other hand, in operation and maintenance, the disassembly work at the time of maintenance / inspection becomes complicated due to the complicated device configuration, and the operability and maintenance / inspection in actual operation may be reduced.

The present invention has been proposed in view of the above-mentioned conventional circumstances, and aims at miniaturization and simplification while ensuring high operation reliability, and at the same time, downsizing of the switchgear itself. It is an object of the present invention to provide a composite hydraulic drive device that can perform the above-described operations.

It is another object of the present invention to provide a combined hydraulic drive device which is excellent in assembling property, operability and maintenance and inspection.

[0024]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a composite hydraulic drive device according to the present invention comprises a hollow support insulator tube and a plurality of storage insulator tubes. A metal container provided, a fixed electrode fixed in each of the storage insulator tubes, contacts of a circuit breaker and a disconnector having a movable electrode housed in a detachable manner with the fixed electrode, and the metal container, An insulating gas sealed in the supporting insulator and the housing insulator, an insulating operating rod housed in the supporting insulator, a mechanism box provided at the other end of the supporting insulator, and a liquid housed in the mechanism box. A pressure-operated hydraulic operating device, and a connecting mechanism provided in the metal container. The operating force of the hydraulic operating device is transmitted from the insulating operating rod to the movable electrode via the connecting mechanism. , The contacts of the circuit breaker and disconnector can be opened and closed. Characterized in that it was.

According to a second aspect of the present invention, there is provided a combined hydraulic drive device according to the present invention, wherein the hydraulic operating device shuts off in response to supply and discharge of a high-pressure fluid. A plurality of hydraulic cylinders for opening and closing the contacts of the disconnector and disconnector;
A plurality of hydraulic pressure control valves for independently driving and controlling the hydraulic cylinders; an accumulator for storing high-pressure hydraulic fluid to be supplied to the plurality of hydraulic pressure cylinders and the hydraulic pressure control valve; A pump for supplying liquid,
A low-pressure tank for storing a low-pressure liquid discharged from the hydraulic cylinder.

According to the second aspect of the present invention, since the hydraulic drive system is designed to easily increase the output by increasing the pressure, the hydraulic cylinder and the hydraulic control valve, which are the main components of the hydraulic operating device, can be made compact. Can be. In addition, the accumulator, pump, and low-pressure tank required for driving can be shared between the hydraulic operating devices for different devices. Therefore,
The number of parts can be greatly reduced and the structure can be simplified.

According to a third aspect of the present invention, there is provided a hybrid hydraulic drive device according to the present invention, wherein the hydraulic operating device is configured to open and close a contact of the circuit breaker. A hydraulic operating part for a device, a hydraulic operating part for a disconnector for opening and closing the contacts of the disconnector, a manifold for forming the hydraulic cylinder on the hydraulic operating part side for the circuit breaker, and the manifold An accumulator, a pump, a low-pressure tank, and the disconnecting switch hydraulic operating section are detachably mounted.

According to the third aspect of the present invention, a member such as an accumulator, a pump, and a low-pressure tank, which can be shared by the two hydraulic operating units together with the disconnecting hydraulic operating unit, is provided in the manifold on the side of the hydraulic operating unit for the circuit breaker. Is attached, there is no need for a pipe connection for connecting the two hydraulic operating units, and the drive device can be further integrated and integrated. Therefore, a space-saving design can be achieved, and the device can be made compact. In addition, since the member attached to the manifold on the side of the hydraulic pressure operation unit for the circuit breaker is detachable, disassembly work at the time of inspection is easy, and maintenance and inspection performance is improved.

According to a fourth aspect of the present invention, there is provided a hybrid hydraulic drive device according to the present invention, wherein the hydraulic operating device includes a shut-off device for opening and closing a contact of the circuit breaker. A hydraulic operating unit for disconnector, and a hydraulic operating unit for disconnector for opening and closing the contacts of the disconnector, wherein the hydraulic operating unit for disconnector and the hydraulic operating unit for circuit breaker are connected to each other by hydraulic piping. It is characterized by having done.

According to the fourth aspect of the present invention, according to the layout of the plurality of contacts constituting the switchgear, a part or the entirety of the disconnecting switch hydraulic operating section is provided at a remote location remote from the circuit breaker hydraulic operating section. Even in the case where it is provided at the position, it is only necessary to connect the hydraulic pressure operating part for disconnector and the hydraulic pressure operating part for circuit breaker with piping. Therefore, excellent design flexibility can be secured. Also,
Accumulators, pumps, low-pressure tanks, and the like can be used in common, and the advantage of compactness of the device due to integration can be maintained.

According to a fifth aspect of the present invention, there is provided a combined hydraulic drive apparatus according to the present invention, wherein when the high-pressure hydraulic fluid in the accumulator is lost, the hydraulic fluid in the accumulator is lost. A piston holding mechanism for holding the position of the pressure piston is provided.

According to the fifth aspect of the present invention, when the high-pressure hydraulic fluid in the accumulator is lost, the lock mechanism operates to maintain the position of the hydraulic piston, so that the open / close state of the contact can be reliably maintained. Thereby, safety and reliability of the device can be improved.

According to a sixth aspect of the present invention, there is provided a combined hydraulic drive apparatus comprising: a drive rod from a hydraulic piston having a flange integrally fixed thereto; A telescopic rod mechanism for telescopically connecting the support part fixed in the mechanism box and the flange, and an elastic body for elastically holding the position of the hydraulic piston on an operating rod of the telescopic rod mechanism. It is characterized by the following.

According to the sixth aspect of the present invention, the closing and closing positions of the hydraulic piston can be reliably held by the load of the compression spring regardless of the presence or absence of the hydraulic pressure. Further, since the open / closed state of the contact can be visually checked from the outside, the checkability is excellent.

According to a seventh aspect of the present invention, there is provided a combined hydraulic drive apparatus according to the present invention, wherein a drive rod from the hydraulic piston and a support fixed in a mechanism box are provided. A feature is provided in which a mounting hole that can be fitted to the bracket is formed, and a mechanism for holding the position of the hydraulic piston by inserting a lock pin into the two fitting holes that match.

According to the seventh aspect of the present invention, the position of the hydraulic piston can be maintained only by inserting the lock pin into the holes of the hydraulic piston and the hydraulic cylinder, and the position of the hydraulic piston can be maintained manually. can do. Also,
Inspection by visual inspection is easy, and safety and reliability are further improved.

According to another aspect of the present invention, there is provided a combined hydraulic drive device according to the present invention, wherein the hydraulic operating device is configured to open and close a contact of the circuit breaker. Dexterous hydraulic operating unit, comprising a disconnecting hydraulic operating unit for opening and closing the contacts of the disconnector, and sliding through the piston rod from the hydraulic piston of the disconnecting hydraulic operating unit, A cylinder head fixed to one end of a hydraulic cylinder is provided in the mechanism box, and a hydraulic control valve is attached to the cylinder head.

According to the eighth aspect of the present invention, since the components are concentrated on the cylinder head of the disconnector hydraulic operating section, it is only necessary to attach a member for sealing the hydraulic fluid to the other end of the hydraulic cylinder. The structure can be simplified. In addition, since a relatively heavy component such as a hydraulic pressure control valve is provided at a position close to the upper fixed point, vibration due to its own operation, operation vibration of the hydraulic pressure operation unit for a circuit breaker having a relatively large driving force, etc. A structure that is strong against external forces, excellent in vibration resistance and strength can be realized. In particular, since the lower end portion opposite to the cylinder head is light, it is easy to mount the hydraulic cylinder in the horizontal direction, and there is an advantage that there is no restriction on the mounting direction and the degree of freedom in layout is increased.

According to a ninth aspect of the present invention, there is provided a hybrid hydraulic drive device according to the present invention, wherein the hydraulic operating device includes a shut-off device for opening and closing the contacts of the circuit breaker. A hydraulic operating part for a disconnector, a hydraulic operating part for a disconnector for opening and closing the contacts of the disconnector, and an outer cylinder is provided substantially concentrically outside the hydraulic cylinder of the hydraulic operating part for the disconnector. To form a double cylinder, and the annular gap between the double cylinders serves as a control flow path for supplying and discharging high-pressure working fluid from a hydraulic control valve to a cylinder chamber in the hydraulic cylinder. And

In the ninth aspect of the present invention, since the control flow path is provided coaxially with the hydraulic cylinder, it is advantageous in simplifying the structure and saving space as compared with a case where a separate flow path is provided.

In order to solve the above-mentioned problem, a composite hydraulic drive device according to the present invention is characterized in that:
The hydraulic operating device includes a circuit breaker hydraulic operating unit that opens and closes the contacts of the circuit breaker, and a disconnector hydraulic operating unit that opens and closes the contacts of the disconnector. A hydraulic cylinder is mounted on a cylinder head fixed in the mechanism box, and a hydraulic pressure control valve is provided on the opposite side of the cylinder head of the hydraulic cylinder.

In the tenth aspect of the present invention, it is necessary to attach a member for sealing the hydraulic fluid to the lower end of the disconnecting switch hydraulic operating section, which is also used for the valve block of the hydraulic control valve. Thus, the structure can be simplified, for example, by reducing the number of parts. In addition, since the valve block can be arranged on the cylindrical cross section of the hydraulic cylinder, a compact design with less protrusion of the member in the radial direction is possible.

In order to solve the above-mentioned problems, a combined hydraulic drive device according to the present invention is configured as follows.
The hydraulic operating device includes a circuit breaker hydraulic operating unit that opens and closes the contacts of the circuit breaker, and a disconnector hydraulic operating unit that opens and closes the contacts of the disconnector. The hydraulic cylinder of the section is mounted on a cylinder head fixed in the mechanism box, a hydraulic control valve is provided on the opposite side of the cylinder head of the hydraulic cylinder, and the hydraulic operating section for the disconnector An outer cylinder is provided substantially concentrically outside the hydraulic cylinder to form a double cylinder, and an annular gap between the double cylinders constantly supplies high-pressure fluid from the accumulator to a cylinder chamber in the hydraulic cylinder. It is characterized in that it is configured to be a high-pressure flow path.

In the eleventh aspect of the present invention, since the high-pressure flow path is provided coaxially with the hydraulic cylinder, it is advantageous in simplifying the structure and saving space as compared with a case where a separate flow path is provided.

In order to solve the above-mentioned problem, a combined hydraulic drive device according to the present invention has the following features.
The hydraulic operating device includes a circuit breaker hydraulic operating unit that opens and closes the contacts of the circuit breaker, and a disconnector hydraulic operating unit that opens and closes the contacts of the disconnector. The piston rod is slid through the hydraulic piston of the section, and a cylinder head fixed to the hydraulic cylinder is fixed in a mechanism box. A hydraulic control valve is attached to the cylinder head. The operation axis of the valve and the operation axis of the hydraulic piston are configured to be orthogonal to each other.

In the twelfth aspect of the present invention, an external force acts in the direction of the axis of operation of the hydraulic piston, such as the vibration caused by the operation of the hydraulic piston or the operation vibration of the hydraulic operating portion for the circuit breaker having a relatively large driving force. In addition, malfunction of the hydraulic control valve can be avoided, and a highly reliable structure can be realized.

In order to solve the above-mentioned problems, a combined hydraulic drive device according to the present invention has the following features.
The hydraulic operating device includes a hydraulic operating unit for a circuit breaker that drives the contacts of the circuit breaker to open and close, and a hydraulic operating unit for a disconnector that opens and closes the contacts of the disconnector. At least one or more on-off valve is provided in the middle of the high-pressure and low-pressure passages connecting the section and the disconnection hydraulic operating section.

[0048] In order to solve the above-mentioned problems, a composite hydraulic drive device according to the present invention is characterized in that:
The hydraulic operating device includes a hydraulic operating unit for a circuit breaker that drives the contacts of the circuit breaker to open and close, and a hydraulic operating unit for a disconnector that opens and closes the contacts of the disconnector. A high-pressure and low-pressure channel connecting the unit and the disconnector hydraulic operating unit is formed by a flexible pipe, and at least one connector with a check valve is provided in the middle.

In order to solve the above-mentioned problem, a combined hydraulic drive device according to the present invention is characterized in that:
The hydraulic operating device includes a hydraulic operating unit for a circuit breaker that drives the contacts of the circuit breaker to open and close, and a hydraulic operating unit for a disconnector that opens and closes the contacts of the disconnector. An auxiliary hydraulic pressure source having at least one or more electric or manual pumps can be connected to the section or the disconnecting switch hydraulic pressure operating section.

In order to solve the above-mentioned problems, a combined hydraulic drive device according to the present invention is characterized in that:
The hydraulic operating device includes a hydraulic operating unit for a circuit breaker that drives the contacts of the circuit breaker to open and close, and a hydraulic operating unit for a disconnector that opens and closes the contacts of the disconnector. An auxiliary hydraulic pressure source including at least one or more electric or manual pumps in the section or the disconnection hydraulic pressure operating section, an auxiliary accumulator for storing high-pressure hydraulic fluid, and an auxiliary for storing low-pressure fluid discharged from the hydraulic cylinder And a tank.

According to the invention of claims 13, 14, 15 and 16, even if the hydraulic pressure of the combined hydraulic drive unit is reduced, the hydraulic pressure operation unit can be inspected and repaired without stopping the line.
It is possible to provide a hydraulic drive that can easily perform various operations such as replacement work and hydraulic pressure recovery work.

[0052]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hybrid hydraulic drive according to an embodiment of the present invention.

[First Embodiment] A first embodiment of a composite hydraulic drive device according to the present invention will be described with reference to FIGS.

FIG. 1 shows a first embodiment of a combined hydraulic drive according to the present invention. This combined hydraulic drive is applied to an insulator type switch 1 as a gas insulated switch. 13. Insulator-type switch 100,000 V to 500,000 V, preferably 14.
It is designed to open and close electric lines of 50,000 V to 400,000 V.

[0055] insulator type switch 1 has a plurality of sealed insulating gas such as SF ₆ gas and nitrogen gas, for example, three receiving porcelain bushing 2, 2a, provided with 2b, each accommodating porcelain tube 2, 2a, 2b is an insulator such as And is fixed and held in a metal container 3 as a main body case. Each of the storage insulator tubes 2, 2a, 2b is attached to a metal container 3 made of, for example, aluminum or the like at a required angle. Of these, 1
One housing insulator 2 houses the contact 6 of the circuit breaker 5, while the other housing insulators 2a and 2b house the first contact 8a and the second contact 8b of the disconnectors 7a and 7b, respectively.
Contacts 6, 8 housed in each housing insulator 2, 2a, 2b
Reference numerals a, 8b denote fixed electrodes 9, 9a, 9b fixed to the distal end side in the storage insulator tubes 2, 2a, 2b and the fixed electrodes 9, 9b.
a, 9b movable electrodes 10 and 10 which are housed in a detachable manner
a, 10b.

On the other hand, the metal container 3 is a hollow supporting insulator 11.
The insulating gas is hermetically sealed in the metal container 3 and the supporting porcelain tube 11. Support insulator 11
A mechanism box 12 is provided at the lower end of the box. Inside the mechanism box 12, for example, a mineral hydraulic oil (M1L) having a small viscosity change
5606) or the like is provided.

The hydraulic operating device 1 is provided in the supporting insulator 11.
Insulated operating rods 14, 14a, 14 driven and operated by 3
b is stored in the insulated operation rods 14, 14
a, 14b are formed of, for example, a glass fiber reinforced plastic material impregnated with a polyester resin, and open and close the respective contacts 6, 8a, 8b via the connecting mechanism portions 15, 15a, 15b housed in the metal container 3. It is made to operate. The coupling mechanisms 15, 15a, 15b constitute an operating force transmission mechanism including a bell crank mechanism or a link mechanism. In an enlarged view of a portion A in FIG. 1, reference numeral 19 denotes an insulating guide tube for guiding the movable electrode 10 of the circuit breaker 5.

Hydraulic operating device 13 of combined hydraulic driving device
Is configured as shown in FIG. 2 and FIG. FIG. 2 is an enlarged front view showing a part of the mechanism box 12 of the combined hydraulic drive device, and FIG. 3 is a plan view showing the inside of the mechanism box 12 from the support insulator tube 11 side.

As shown in FIGS. 2 and 3, the hydraulic operating device 13 is housed in the mechanism box 12, and has a circuit breaker hydraulic operating section 16 for controlling the opening and closing of the contacts of the circuit breaker 5, and two disconnections. Disconnecting switch hydraulic control units 17 and 18 for controlling the opening and closing of the contacts 8a and 8b of the switches 7a and 7b.
6, 17, and 18 are combined and integrally assembled. The hydraulic operating device 13 is mounted on the lid 12a of the mechanism box 12 and suspended in consideration of the assemblability and the alignment.

The circuit breaker hydraulic operating section 16 is housed in the mechanism box 12 and fixed to the case lid 12 a of the mechanism box 12 via the mounting frame 20. This hydraulic operation unit 1 for circuit breaker
6 is a hydraulic cylinder 22 for driving the contact 6 of the circuit breaker 5
A hydraulic control valve 23 for controlling a working fluid such as hydraulic oil for controlling the operation of the hydraulic cylinder 22;
An accumulator 24 that constantly accumulates a working fluid, which is a high-pressure working fluid, a pump 25 that generates a high-pressure working fluid;
A hydraulic pressure monitor 26 for monitoring the pressure of the high-pressure hydraulic fluid and a low-pressure tank 27 for storing the low-pressure fluid are provided.

The hydraulic cylinder 2 of the circuit breaker hydraulic operating section 16
2 is formed, for example, in a rectangular block-shaped manifold 30, and a hydraulic control valve 23, an accumulator 24, a pump 25, a hydraulic pressure monitor 26, and a low-pressure tank 27 are detachably mounted on the outer surface of the manifold 30. It is attached.

A hydraulic piston 32 is slidably housed in the hydraulic cylinder 22, and a piston rod 33 as an operating rod is fixed to the hydraulic piston 32. A drive rod 34 is operatively connected to the piston rod 33, and the drive rod 34 is connected to the insulating operation rod 14 through a seal portion 35 that seals the insulating gas.

On the other hand, the disconnecting device hydraulic operating sections 17 and 18
The mounting frames 20a, 20a are attached to the case lid 12a of the mechanism box 12.
0b. Hydraulic operation unit 17, 1
Reference numeral 8 denotes two sets of hydraulic cylinders 37 and 38 for opening and closing the contacts 8a and 8b of the two disconnectors 7a and 7b, respectively, and a hydraulic pressure for controlling the working fluid for controlling the operation of the hydraulic cylinders 37 and 38. Control valves 39 and 40 are provided.

The accumulator 24 for constantly storing the high-pressure hydraulic fluid in the hydraulic cylinders 37 and 38, the pump 25 for generating the high-pressure hydraulic fluid, the hydraulic pressure monitor 26 for monitoring the high-pressure hydraulic fluid, and the low-pressure tank 27 for storing the low-pressure hydraulic fluid include: The components provided in the circuit breaker hydraulic pressure operating section 16 are shared.

The hydraulic control valves 39 and 40 are mounted on the manifolds 30a and 30b of the corresponding hydraulic cylinders 37 and 38, respectively, and are connected to the manifold 30 on the hydraulic operating section 16 for the circuit breaker. Hydraulic pistons 32a and 32b are slidably housed in the hydraulic cylinders 37 and 38, respectively.
In b, piston rods 33a and 33b are provided as operating rods. Drive rods 34a, 34b are connected to these piston rods 33a, 33b. The drive rods 34a, 34b are provided with sealing portions 35a,
35b is connected to the insulating operation rods 14a and 14b.

FIG. 4 shows the hydraulic circuit configuration of the circuit breaker hydraulic pressure operating section 16 and the disconnecting switch hydraulic pressure operating sections 17 and 18 which constitute the hydraulic pressure operating device 13. FIG. 4 is a simplified diagram showing, in principle, a hydraulic operating device 13 of the insulator type switch 1 as a combined hydraulic driving device.

First, the hydraulic circuit configuration of the circuit breaker hydraulic operating section 16 will be described. In the hydraulic cylinder 22, a first cylinder chamber 43 is formed on the piston rod 33 side of the hydraulic piston 32 to form a working chamber for opening the contact 6, and a working chamber for closing the contact 6 is provided on the opposite side of the piston rod 33. A second cylinder chamber 44 to be formed is formed. The first cylinder chamber 43 of the hydraulic cylinder 22 communicates with the accumulator 24 via a high-pressure channel 45 formed in the manifold 30, and also communicates with the hydraulic control valve 23 via a high-pressure channel 45. . The second cylinder chamber 44 in the hydraulic cylinder 22 is also connected to the hydraulic pressure control valve 23.

The hydraulic pressure control valve 23 has a switching valve 46 for switching the flow path, while the control port 47 and the liquid supply port 4
8 and a drain port 49 are formed, and the switching valve 46 is slidably operated by the opening electromagnetic coil 50 and the closing electromagnetic coil 51. The switching valve 46 selectively switches the control port 47 to a liquid supply port 48 or a liquid discharge port 49. The control port 47 selectively supplies and discharges high-pressure hydraulic fluid to and from the second cylinder chamber 44 of the hydraulic cylinder 22. Liquid supply port 4
8 is constantly communicated with the accumulator 24 and the first cylinder chamber 43 of the hydraulic cylinder 22 via the high-pressure channel 45.

On the other hand, the drain port 49 is connected to the manifold 30.
It is always connected to a low-pressure tank 55 via a low-pressure channel 54 formed therein. The opening electromagnetic coil 50 and the closing electromagnetic coil 51 supply an electromagnetic force for causing the switching valve 46 to slide, and switch the flow path of the switching valve 46.

The accumulator 24 is provided with an accumulator piston 57 that slides freely inside the accumulator 24. One side of the accumulator piston 57, for example, a backside chamber 58 is filled with high-pressure nitrogen gas and charged on the other side. A liquid storage chamber 59 for storing a high-pressure hydraulic fluid is formed in the storage chamber 59. The accumulator 24 is directly connected to the manifold 30 and is integrally formed. The liquid storage chamber 59 is connected to the first cylinder chamber 4 of the hydraulic cylinder 22 through the high-pressure flow passage 45 in the manifold 30.
3 is always in communication.

Further, the pump 25 is attached to the manifold 30 via a casing 60 for storage.
The pump is driven by a motor (not shown). The discharge port 61 of the pump 25 communicates with the high-pressure channel 45, and the suction port 62 communicates with the low-pressure channel 54.

The low pressure tank 27 is mounted so as to cover a part of the side surface of the manifold 30. This low pressure tank 2
The opening 7 communicates with the low-pressure channel 54 of the manifold 30.

On the other hand, the hydraulic circuit configuration of the disconnecting switch hydraulic operating sections 17 and 18 is such that the hydraulic cylinders 37 and 38 and the hydraulic control valves 39 and 40 are connected to the hydraulic cylinder 2 of the circuit breaker hydraulic operating section 16.
2 and the hydraulic pressure control valve 23. The hydraulic cylinders 37, 38 are provided in manifold blocks 30a, 30b extending from the manifold 30. At this time, the hydraulic piston 3 is provided in each of the hydraulic cylinders 37 and 38.
2a and 32b are slidably housed, and each hydraulic piston 3
The first on the piston rod 33a, 33b side of the 2a, 32b
Cylinder chambers 43a and 43b are formed respectively, and a second cylinder chamber 44 is provided on the opposite side of the piston rods 33a and 33b.
a and 44b are respectively formed.

The first cylinder chambers 43a and 43b of the hydraulic cylinders 37 and 38 are connected to the manifold blocks 30a and 30b, respectively.
b, is communicated with the accumulator 24 via high-pressure channels 45a, 45b formed in
It is also connected to 40. The hydraulic cylinders 37, 3
The second cylinder chambers 44a and 44b in
9 and 40 respectively.

The hydraulic pressure control valves 39 and 40 have control ports 47a and 4 for selectively supplying and discharging high-pressure hydraulic fluid to and from the second cylinder chambers 44a and 44b of the hydraulic cylinders 37 and 38, respectively.
7b and the first cylinder chamber 4 of the accumulator 24 and the hydraulic cylinders 37 and 38 via the high-pressure channels 45a and 45b.
Liquid supply ports 48a and 48b communicating with 3a and 43b,
Drainage ports 49a, 49b connected to the low-pressure tank 27 via low-pressure channels 54a, 54b formed in the manifold blocks 30a, 30b are provided.

The control ports 47a and 47b are connected to the supply ports 48a and 48b or the drain ports 49a and 49b.
Are provided with switching valves 46a and 46b for selectively performing switching control, and the switching valves 46a and 46b are provided with opening electromagnetic coils 50a and 50b and closing electromagnetic coils 51a and 51b.
Is driven by the electromagnetic force from the switch. In FIG. 4, a multiple main bus of the power system including a first main bus 52a and a second main bus 52b is shown, and a line circuit 53a from the first main bus 52a and a line circuit 53 from the second main bus 52b.
b is branched, main line selection disconnectors 7a and 7b are provided in each of the line circuits 53a and 53b, and a circuit breaker 5 is provided in the line bus 53.

The movable electrode 10 of the circuit breaker 5 is fixed to the tip of an electrode rod 55 made of metal such as aluminum or iron. The electrode rod 55 is slidably guided and supported by the electrode terminal 56 on the metal container 3 side. This electrode terminal 56
Are electrode rods 55a, 55 to which the movable electrodes 10a, 10b of the disconnectors 8a, 8b are attached via the metal container 3.
b are electrically connected to electrode terminals 56a and 56b, respectively, which slidably guide b.

Next, the operation of the hydraulic operating device 13 of the combined hydraulic drive will be described.

FIG. 4 shows the energized state of the contacts 6 of the circuit breaker 5 of the insulator type switch 1 and the contacts 8a and 8b of the disconnectors 7a and 7b, that is, the hydraulic operating section 16 for the circuit breaker and the hydraulic operating section 1 for the disconnector.
7 shows a closed state of each of the contacts 6, 8a, and 8b that are opened and closed by the switches 7 and 18.

The storage chamber 59 of the accumulator 24 provided in the hydraulic operating device 13 has an accumulator piston 57
The high-pressure hydraulic fluid from the accumulator 24 is supplied to the high-pressure passage 45 in the first cylinder chamber 43 side of the hydraulic cylinder 22 for circuit breaker.
Is always working through. The area where the high-pressure hydraulic fluid acts on the surface on the first cylinder chamber 43 side is S1 and the force acting on the hydraulic piston 32 is F1. Similarly, the first cylinder chambers 43a, 43 of the disconnector opening / closing hydraulic cylinders 37, 38 are provided.
The high pressure hydraulic fluid also acts on b.

At this time, the hydraulic pressure control valve 23 is
Since the liquid supply port 48 and the control port 47 communicate with each other, the high-pressure hydraulic fluid (fluid such as high-pressure hydraulic oil) also acts on the second cylinder chamber 44 side of the hydraulic cylinder 22. still,
The area where the high-pressure hydraulic fluid acts on the surface of the hydraulic piston 32 on the second cylinder chamber 44 side is S2, and the force acting on the hydraulic piston 32 is F2.

Hydraulic operating device 13 of combined hydraulic driving device
According to FIG. 4, the hydraulic piston 3 of the hydraulic cylinder 22
The area ratio at which high-pressure hydraulic fluid, for example, oil acts on the area S2
<S2. Therefore, the force acting on the hydraulic piston 32 is F1 <F2. That is, the hydraulic piston 32 is pushed up from the second cylinder chamber 44 side and holds the injection position shown in FIG.

Similarly, in the hydraulic pressure control valves 39a and 39b, the liquid supply ports 48a and 48b and the control ports 47a and 47b communicate with each other by the respective switching valves 46a and 46b. The loading position shown in FIG. 4 is held.

As described above, when all the hydraulic cylinders 22, 37, 38 of the hydraulic operating device 13 of the combined hydraulic drive are in the closed state, that is, from the closed state shown in FIG. 5 and disconnecting switches 7a and 7b,
It operates as follows.

When performing a breaking operation for opening the contact 6 of the circuit breaker 5, the hydraulic operating section 16 for the circuit breaker is operated. When the opening electromagnetic coil 50 of the hydraulic pressure control valve 23 is energized, the opening electromagnetic coil 50 is excited and the valve body of the switching valve 46 moves to the left in FIG. The communication between the port 47 and the drainage port 49 is established. For this reason, the second cylinder chamber 44 of the hydraulic cylinder 22
The high-pressure hydraulic fluid inside moves from the control port 47 to the drain port 49 side, the hydraulic pressure in the second cylinder chamber 44 decreases, and the force acting on the hydraulic piston 32 becomes F1> F2. The acting force F1 of the high-pressure hydraulic fluid acting in the first cylinder chamber 43 drives the hydraulic piston 32 to open the contact 6 of the circuit breaker 5 connected to the piston rod 33. During this shutoff operation, the drainage from the second cylinder chamber 44 of the hydraulic cylinder 22 is once collected in the low-pressure tank 27 via the low-pressure channel 54.

On the other hand, when the contact 6 of the circuit breaker 5 is closed, that is, when the closing operation is performed, the closing electromagnetic coil 51 of the hydraulic pressure control valve 23 is energized in the circuit breaker hydraulic operating section 16. . By energizing the closing electromagnetic coil 51, the valve body of the switching valve 46 moves to the right in FIG. 4, and the switching valve 46 performs an inversion switching operation. At this time, the drain port 49 is closed, and the liquid supply port 48 and the control port 47 are closed.
Are open and communicate with each other, the high-pressure hydraulic fluid is supplied to the second cylinder chamber 44 of the hydraulic cylinder 22 and the hydraulic piston 3
2 is F1 <F2. Therefore, the high-pressure hydraulic fluid in the second cylinder chamber 44 drives the hydraulic piston 32 to push it up, closing the contact 6 of the circuit breaker 5 connected to the piston rod 33.

The high-pressure hydraulic fluid of the circuit breaker hydraulic pressure operating section 16 is consumed by the shut-off operation and the closing operation of the circuit breaker 5, and the hydraulic pressure of the liquid storage chamber 59 in the accumulator 24 decreases. The drainage collected in the tank 27 is
By starting the pump 25, the liquid is returned from the discharge port 61 into the liquid storage chamber 59 of the accumulator 24, and the liquid pressure in the liquid storage chamber 59 is increased again.

In addition, for inspection or repair of electric equipment,
When it is necessary to disconnect a part of the electric system from the main bus 52, after disconnecting the contact 6 of the circuit breaker 5, the disconnector 7
The first contact 8a or the second contact 8b can be opened. Contact points 8a, 8b of disconnectors 7a, 7b
Can be performed in exactly the same manner as in the case of the circuit breaker 5 and independently of each other. In other words, when only the disconnecting switch hydraulic pressure operating section 17 is to be shut off in the shut-off state of the circuit breaker hydraulic operating section 16, if a signal is given to the opening electromagnetic coil 50 a of the hydraulic control valve 39, the operation of the switching valve 46 a is performed. Accordingly, the hydraulic pressure in the second cylinder chamber 44a of the hydraulic cylinder 37 decreases. Since the high-pressure hydraulic fluid is acting on the first cylinder chamber 43a, the hydraulic piston 32a is driven, and the first contact 8a is opened. The reverse closing operation is performed in the same manner as the circuit breaker hydraulic pressure operation unit 16.

In addition, opening of the second contact 8b of the disconnector 7b,
The closing operation is performed similarly to the disconnecting switch 7a.

According to the insulator type switch 1 to which the combined hydraulic drive device is applied, the following effects can be obtained.

The system for driving the contacts 8a and 8b of the disconnectors 7a and 7b to open and close can be a hydraulic drive system, like the system for driving the contacts 6 of the circuit breaker 5 to open and close. Therefore, the hydraulic drive unit can be integrated and integrated, the hydraulic pressure operation units 16, 17, and 18 of the hydraulic drive unit can be shared, and miniaturization can be achieved.

The adoption of the hydraulic drive system makes it easy to increase the output, and the hydraulic cylinders 37, 38 and the hydraulic control valves 39, 40 of the disconnector hydraulic operating sections 17, 18 are compactly constructed. Excellent operation reliability can be secured. In particular, even if the disconnectors 7a and 7b require responsibilities such as loop current interruption when opening and closing the electric line, the switching speed of the contacts 8a and 8b of the disconnectors 7a and 7b can be easily increased. It is possible to improve the insulation recovery characteristics between the contacts 8a and 8b.

Further, the connecting mechanism parts 15, 15a, 15b
In the metal container 3 and the insulated operation rods 14, 14
Since a and 14b are stored in the supporting insulator 11 respectively,
Even if it is installed in the metal container 3, the insulator tubes 2, 2a, 2b can be configured compactly. As a result, the three storage insulator tubes 2, 2 a, 2 b can be attached to a single metal container 3. Thereby, integration of the insulator type switch 1 itself can also be achieved. Moreover, the coupling mechanism 1
The metal container 3 for housing 5, 15a, 15b can also be miniaturized, and can be reduced in size and size. Therefore, it is possible to contribute to downsizing of the insulator type switch 1 and to greatly reduce the cost. it can.

In the hydraulic operating device 13, the accumulator 24, the pump 25, and the hydraulic monitor 26 are provided in the hydraulic operating unit 16 for the circuit breaker and the hydraulic operating units 17 and 18 for the disconnecting switch.
In addition, since the low pressure tank 27 can be shared, the integration of the hydraulic drive unit can be further promoted, which is effective in reducing the number of parts and simplifying the structure. Furthermore, since the member attached to the manifold 30 on the circuit breaker hydraulic pressure operating section 16 side is detachable, disassembly work at the time of inspection is easy, and maintenance and inspection performance is improved.

[Second Embodiment] A second embodiment of a combined hydraulic drive device according to the present invention will be described with reference to FIG. Note that the same reference numerals are given to portions having the same functions as those in the above-described embodiment, and description thereof will be omitted.

In the hybrid hydraulic drive device shown in the second embodiment, the hydraulic operating device 13A is a hydraulic operating device 16 for a breaker.
And the hydraulic operating sections 17 and 18 for disconnectors are connected with hydraulic pipings 67 and 6.
8 is connected. That is, the hydraulic cylinders 37 and 38b for driving the disconnectors 7a and 7b and the hydraulic control valves 39 and 40 are arranged separately from the manifold 30 in which the hydraulic cylinder 22 for driving the circuit breaker is formed.

At this time, the first cylinder chambers 43a and 43b of the hydraulic cylinders 37 and 38 are connected to the accumulator 24 via the high-pressure pipe 67 together with the supply ports 48a and 48b of the hydraulic control valves 39 and 40. . At the same time, the drain ports 49a and 49b of the hydraulic pressure control valves 39 and 40 are connected to the low pressure piping 6
8 is connected to the low-pressure tank 27. The hydraulic drive device configured as described above has the same operation and function as those of the first embodiment, and there is no difference. Therefore, the description is omitted.

According to the combined hydraulic drive device shown in the second embodiment, each hydraulic operating portion 16 of the hydraulic operating device 13
Since the hydraulic accumulator 24, the pump 25, the low-pressure tank 27, and the like can be shared similarly to the first embodiment, the space-saving design and miniaturization of the hydraulic drive device can be achieved. It will be easier. In particular, depending on the layout of the plurality of current-carrying contact points in the electric system constituting the gas insulated switchgear, part or all of the disconnecting switch hydraulic operating sections 17 and 18 are separated from the circuit breaker hydraulic operating section 16. When provided at a distant position, the hydraulic pipes 67 and 68 are formed of flexible pipes, for example, flexible hoses, and only the flexible pipes 67 and 68 need to be connected. The layout configuration of the pressure operation device is obtained.

[Third Embodiment] A third embodiment of the combined hydraulic drive device according to the present invention will be described with reference to FIG.

The hybrid hydraulic drive device shown in the third embodiment has a first contact 8a of the disconnector 7a shown in FIG.
Is an improved version of the position holding function. In the first or second embodiment, when the hydraulic pressure of the high-pressure hydraulic fluid is reduced for inspection, or when the hydraulic pressure is lost due to a large amount of fluid leakage, the weight of the hydraulic piston 32a and the contact 8a are reduced. This is because the opening / closing state of the disconnecting switch contact 8a may fluctuate due to the influence of the received gas pressure. Therefore, for safety, the position holding function of the disconnecting switch contact 8a has been improved so that the open / close state of the disconnecting switch contact 8a does not change.

The hybrid hydraulic drive shown in FIG. 6 includes a piston holding mechanism 70 for holding the closed state of the hydraulic piston 32a. Except for the piston holding mechanism 70, the first
Since this is not different from the second embodiment, the same reference numerals are given and the description is omitted.

In FIG. 6, a circumferential groove 72 is formed in a reduced diameter portion 71 on the first cylinder chamber 43a side in a hydraulic piston 32a that slides in a hydraulic cylinder 37. The lock pin 73, which is a holding operation rod, is configured to be engageable. The lock pin 73 is the piston holding mechanism 7
0 is provided on a lock piston 76 slidably supported by a holding cylinder 75. The lock piston 76 is spring-biased by an elastic body provided on its back, for example, a spring 77, while high-pressure hydraulic fluid from the accumulator 24 (see FIG. 4) is guided to the cylinder chamber 78 on the opposite side of the lock piston 76. It has become.

During normal operation, the lock piston 76 is pushed in by the action of the high-pressure hydraulic fluid against the spring force of the spring 77, and the lock pin 73 is held at the retracted position. No contact with 72. However, when the hydraulic pressure of the high-pressure hydraulic fluid is lost, the lock piston 76 projects by the spring force of the spring 77, and the tip of the lock pin 73 engages with the peripheral groove 72 of the hydraulic piston 32a and abuts thereon. With this contact, the hydraulic piston 32
a holds the input position. The contact 8a (see FIG. 4) interlocked with the hydraulic piston 32a is also kept closed.

On the other hand, even in the shut-off position (opening position) of the hydraulic piston 32a, the opening position can be maintained by providing a piston holding mechanism (not shown) for the hydraulic piston 32a in the same manner.

Although the disconnecting switch 7a has been described as an example in FIG. 6, the disconnecting switch 7b and the circuit breaker 5 having the same piston holding mechanism can also apply the piston holding mechanism of the hydraulic pistons 32b and 32.

According to the third embodiment, even when the hydraulic pressure of the combined hydraulic drive device is lost, the contact 8a of the disconnector 7a
The open / closed state of the hydraulic drive can be reliably maintained,
Reliability can be improved.

[Fourth Embodiment] FIG. 7 shows a fourth embodiment of the combined hydraulic drive device according to the present invention.

In the fourth embodiment, the position holding function of the first contact 8a of the disconnector 7a is improved as in the third embodiment.

The combined hydraulic drive device shown in the fourth embodiment is provided with a toggle device 80 which is interlocked with the piston rod 33a of the hydraulic piston 32a and the drive rod 34a. The configuration other than the toggle device 80 is not different from that of the first or second embodiment.
The description is omitted.

The toggle device 80 includes a hydraulic cylinder 37
A support portion 81 fixed on a mounting frame 20a for supporting (see FIG. 4) is provided, and a torque device 80 is provided between the support portion 81 and a flange 82 integrally provided on the drive rod 34a. . The torgue device 80 includes a telescopic rod mechanism 83 that is held so as to be able to expand and contract, and an elastic body, for example, a spring 85 that urges the operating rod 84 of the telescopic rod mechanism 83 in the direction in which it extends.

In FIG. 7, the drive rod 34 of the disconnector 7a is
a, the drive rod 34b of the disconnector 7b and the drive rod 34 of the circuit breaker 5 having the same mechanism are described.
, A similar toggle device can be applied.

According to the fourth embodiment, regardless of the presence or absence of the hydraulic pressure of the high-pressure hydraulic fluid, the closing position or the closing position of the hydraulic piston 32a is determined by the spring force (spring load) of the spring 85.
Can be securely held. Moreover, the contact 8a
The open / closed state of the device can be visually checked from the outside, and excellent checkability can be obtained.

[Fifth Embodiment] FIG. 8 shows a fifth embodiment of the composite hydraulic drive device according to the present invention.

The fifth embodiment is similar to the third and fourth embodiments described above, in that the disconnector 7 of the composite liquid material driving device is provided.
This is an improvement on the position holding function of the first contact point 8a.

The composite hydraulic drive shown in FIG. 8 shows a rod lock mechanism 88 for locking the drive rod 34a or the piston rod 33a when the disconnector 7a is in the closed state or the closed state. Since the configuration other than the drive rod lock mechanism 88 is not different from the first and second embodiments, the same reference numerals are given and the description thereof is omitted.

As shown in FIG. 8, the rod lock mechanism 88 has a bracket 89 from the mounting frame 20a facing the driving rod 34a, and mounting holes 90 and 91 are formed in the bracket 89 and the driving rod 34a, respectively. When the pressure piston 32a (see FIG. 4) is turned on or off, the mounting holes 90 and 91 are aligned and configured to be aligned. Then, when the mounting holes 90 and 91 are overlapped and fitted with each other, the lock pin 92 is inserted to lock the drive rod 34a, and the closing and closing positions of the hydraulic piston 32a are maintained.

In FIG. 8, the drive rod 34 of the disconnector 7a is
a, the drive rod 3 of the disconnector 7b
The rod lock mechanism can be similarly applied to the drive rod 4b and the drive rod 34 of the circuit breaker 5.

According to the fifth embodiment, the rod lock mechanism 88 is applied, that is, the matching mounting hole 9 is used.
The position of the hydraulic piston 32a can be reliably held only by inserting the lock pin 92 into 0, 91, and the position of the hydraulic piston 32a can be easily held manually.
In addition, visual inspection and confirmation are easy, and safety and reliability are further improved.

[Sixth Embodiment] FIGS. 9 and 10 show a sixth embodiment of the composite hydraulic drive device according to the present invention.

In the sixth embodiment, the disconnection switch hydraulic operating section 1
7 (18) shows a specific configuration. FIG.
FIG. 10 is a side sectional view of the disconnecting switch hydraulic operation section 17, and FIG. 10 is a side sectional view thereof. The same applies to the other disconnecting switch hydraulic operation section 18. Portions having the same functions as those of the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.

In the disconnecting switch hydraulic operating section 17 shown in FIG. 9, a hydraulic cylinder 37 for slidably receiving a hydraulic piston 32a and a concentric circular cylinder provided on the outer peripheral side of the hydraulic cylinder 37 are provided coaxially. The one end of the outer cylinder 95 is inserted into and fixed to a block-shaped cylinder head 96. The cylinder head 96 is provided with a hydraulic piston 32a.
2 and the piston rod 33a extending from the frame 20 in the mechanism box 12 as shown in FIG.
fixed to a.

A hydraulic pressure control valve 39 is provided on the cylinder head 96, and a plug 97 for sealing the hydraulic fluid is attached to the other end of the outer cylinder 95. A substantially concentric double cylindrical structure is formed by the hydraulic cylinder 37 and the outer cylinder 95, and the annular space which is a gap between the two is formed by the hydraulic control valve 39 and the second cylinder chamber 44 in the hydraulic cylinder 37.
a is used as a control channel 98 that communicates with a. Similarly, the first cylinder chamber 43 a of the hydraulic cylinder 37 communicates with the hydraulic pressure control valve 39 via a flow path 99 of the cylinder head 96.

The hydraulic pressure control valve 39 is, as shown in FIG.
A valve block 100 is provided.
A control port 47a, a liquid supply port 48a, and a drain port 49a are provided.

Each port 47a provided in the hydraulic pressure control valve 39,
The role of 48a and 49a will be described.

The control port 47a is connected to the control flow path 98a and selectively supplies or discharges the high-pressure hydraulic fluid to or from the second cylinder chamber 44a of the hydraulic cylinder 37. The liquid supply port 48a communicates with the accumulator 24 and the first cylinder chamber 43a of the hydraulic cylinder 37 via the high-pressure channel 45a. The drain port 49a is connected to the low-pressure tank 27 via the low-pressure channel 54a.

Further, the valve block 100 has a control port 47a connected to a liquid supply port 48a or a drain port 49a.
And a switching valve 46a for selectively switching between the two. Port switching by the switching valve 46a is performed by the valve block 10
0 by the electromagnetic force of the opening electromagnetic coil 50a and the closing electromagnetic coil 51a provided on both sides of the push rod 1.
01 is driven.

On the other hand, the hydraulic pressure control valve 39 is provided in the cylinder head 96 such that the operating axis of the switching valve 46a and the operating axis of the hydraulic piston 32a are orthogonal to each other.

As shown in FIG. 6 showing the third embodiment, the hydraulic piston 32
A piston holding mechanism 70 for holding the input state of “a” is provided.

Further, on both sides of the hydraulic piston 32a, the shut-off damper piston 102 and the closing damper piston 10
3 is formed. At the end of the opening operation, the breaking damper piston 102 and the plug 97 are fitted to form an opening damper chamber 104. When the shut-off damper piston 102 is inserted into the opening damper chamber 104, the internal pressure of the opening damper chamber 104 increases, and the hydraulic piston 3
2a is buffered and stopped. Similarly, at the end of the closing operation, the closing damper piston 103 and a part of the cylinder head 96 are fitted to each other, whereby the closing damper chamber 1 is closed.
05 is formed so that the hydraulic piston 32a stops smoothly.

Since the disconnecting switch hydraulic pressure operating section 17 (18) has the same operation and function as those of the above-described embodiment, the description thereof will be omitted.

According to the sixth embodiment, the following effects can be obtained.

In the disconnecting switch hydraulic operating section 17, the hydraulic control valve 39 is provided on the cylinder head 96 at the upper end thereof, and the operating axis of the switching valve 46a and the operating axis of the hydraulic piston 32a are orthogonal to each other. Provided. For this reason,
There is no need to attach any structure other than the plug 97 that seals the working fluid to the lower end of the disconnector hydraulic pressure operation unit 17, and a simple structure can be realized.

Moreover, since a relatively heavy object such as the hydraulic pressure control valve 39 is provided at a position close to the mounting frame 20a, which is the upper fixed point, the vibration and the driving force due to the operation of the hydraulic pressure control valve 39 are relatively small. Even if an external force acts such as a large operation vibration of the circuit breaker hydraulic pressure operating section 16, an excessive vibration force is not generated in the hydraulic cylinder 37 or the like, and a structure excellent in vibration resistance and strength can be presented. In particular, since the lower end of the disconnecting switch hydraulic pressure operating portion 17 is light, it can be easily mounted in the horizontal direction, and there is an advantage that there is no restriction on the mounting direction and the degree of freedom in layout is increased.

Further, since the switching valve 46a of the hydraulic pressure control valve 39 and the operating direction of the hydraulic piston 32a are orthogonal to each other, the vibration caused by the operation of the hydraulic piston 32a and the hydraulic pressure for the circuit breaker having a relatively large driving force are obtained. For example, operation vibration of the operation unit 16
Even if an external force acts in the operating axis direction of the hydraulic piston 32a,
A malfunction of the switching valve 46a can be avoided, and a highly reliable structure can be realized.

On the other hand, when the closing and closing operations of the hydraulic piston 32a of the disconnector hydraulic operating section 17 are performed, the hydraulic control valve 39 is operated.
A flow path for supplying and discharging the high-pressure hydraulic fluid to and from the second cylinder chamber 44a of the hydraulic cylinder 37 via the hydraulic cylinder 37 is required. In the present embodiment, a hydraulic cylinder 37 and an outer cylinder 95 formed coaxially so as to cover the outer peripheral surface thereof are formed by two cylinders.
The gap of the heavy cylindrical structure is used as the control channel 98. Accordingly, the control passage 9 is concentric with the hydraulic cylinder 37.
8 is provided, which is advantageous in simplifying the structure and saving space as compared with a case where a control flow path is separately arranged.

[Seventh Embodiment] FIG. 11 shows a seventh embodiment of the combined hydraulic drive device according to the present invention.

The seventh embodiment, like the sixth embodiment, relates to a specific structure of the disconnecting switch hydraulic operation section 17 (18).

FIGS. 11 (A) and 11 (B) are a front sectional view and a side view, respectively, of the disconnecting switch hydraulic operating section 17, and portions having the same functions as those of the above-described embodiment are denoted by the same reference numerals. And the description is omitted.

In the disconnecting switch hydraulic operating section 17 shown in FIG. 9, a hydraulic cylinder 37 accommodating a hydraulic piston 32a is slidably provided, and the hydraulic cylinder 37 is provided concentrically so as to cover the outer peripheral side of the hydraulic cylinder 37. Both ends of the outer cylinder 95 are inserted and fixed to a block-shaped cylinder head 96. This cylinder head 96, as shown in FIG.
It is fixed to the mounting frame 20a in the mechanism box 12. A hydraulic pressure control valve 39 is provided at the other end of the hydraulic cylinder 37 and the outer cylinder 95, and the valve block 100 is attached as a member for sealing the hydraulic fluid.

A double cylinder structure is formed by the hydraulic cylinder 37 and the outer cylinder 95.
9 is used as a high-pressure channel 110 that communicates with the first cylinder chamber 43 a in the hydraulic cylinder 37. Further, the cylinder head 96 is provided with a piston holding mechanism 70 for holding the closed state of the hydraulic piston 32a, as in the sixth embodiment.

As with the sixth embodiment, the valve block 100 of the hydraulic pressure control valve 39 also has a liquid supply port 48a connected to the high-pressure flow path 110 in the double cylindrical gap, a liquid discharge port 49a, and a liquid supply port 49a. A control port 47a for selectively supplying or discharging the high-pressure hydraulic fluid to or from the second cylinder chamber 44a of the pressure cylinder 37. Also, this valve block 10
0 is a switching valve 46 for selectively switching the control port 47a to the liquid supply port 48a or the liquid discharge port 49a.
a. The switching valve 46a is configured to be driven via the push rod 101 by the electromagnetic force of the opening electromagnetic coil 50a and the closing electromagnetic coil 51a provided on both sides of the valve block 100.

Further, the hydraulic pressure control valve 39 is provided with a switching valve 46a.
And the operating axis of the hydraulic piston 32a are orthogonal to each other. The hydraulic drive device configured as described above has the same operation and function as those of the above-described embodiment, and there is no difference. Therefore, the description is omitted.

According to the seventh embodiment, the following effects can be obtained.

In the disconnecting switch hydraulic operating section 17, a hydraulic control valve 39 is provided at the lower end thereof, and is mounted so that the operating axis of the switching valve 46a and the operating axis of the hydraulic piston 32a are orthogonal to each other. It is necessary to attach a member for sealing the hydraulic fluid to the lower end of the disconnector hydraulic pressure operating unit 17, and by using this as the valve block 100 of the hydraulic pressure control valve 39, the number of parts can be reduced. The structure can be simplified. In addition, since the valve block 100 can be arranged on the cylindrical cross section of the outer cylinder 95, a compact design with less protrusion of the member in the radial direction is possible.

When the high-pressure hydraulic fluid is discharged from the second cylinder chamber 44a of the hydraulic cylinder 37 through the hydraulic pressure control valve 39, the pressure loss is small because the path is short.
The speed of the opening operation is increased.

Further, since the switching valve 46a of the hydraulic pressure control valve 39 and the operating direction of the hydraulic piston 32a are orthogonal to each other, the vibration caused by the operation of the hydraulic piston 32a and the hydraulic pressure for the circuit breaker having a relatively large driving force are obtained. For example, operation vibration of the operation unit 16
Even if an external force acts in the operating axis direction of the hydraulic piston 32a,
The switching valve 46a does not malfunction and a highly reliable structure can be realized.

Furthermore, the first cylinder chamber 4 of the hydraulic cylinder 37 located on the upper end side of the disconnector hydraulic operating section 17
3a and a liquid supply port 4 of a hydraulic pressure control valve 39 provided at a lower end portion.
8a is connected to the hydraulic cylinder 37
And an outer cylinder 95 provided substantially concentrically so as to cover the outer peripheral surface thereof, and a gap of a double cylindrical structure is used for an annular high-pressure flow path. In this case, since the high-pressure channel 110 is provided coaxially with the hydraulic cylinder 37, it is advantageous in simplifying the structure and saving space compared to a case where a separate channel is provided.

[Eighth Embodiment] FIG. 12 and FIG.
14 shows an eighth embodiment of the combined hydraulic drive device according to the present invention.

FIG. 12 is a hydraulic circuit diagram showing an example of the eighth embodiment of the composite hydraulic drive device. The combined hydraulic drive device shown in the eighth embodiment is composed of a circuit breaker hydraulic operation portion 16 of the hydraulic operation device 13 and each of the disconnection device hydraulic operation portions 17, 1.
And at least one connector with an on-off valve or a check valve in the middle of each of the high-pressure and low-pressure passages connecting to the control valve 8. In describing the composite drive device, the same members or portions having the same functions as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The combined hydraulic drive shown in FIG.
Similarly to the hydraulic pressure control device 13A of the second embodiment, the hydraulic pressure operation unit 16 for circuit breakers and the hydraulic pressure operation units 17 and 18 for disconnectors are
The high pressure pipe 67 and the low pressure pipe 68 are connected to each other, and connectors 112a, 112b;
a, 113b. The high-pressure pipe 67 and the low-pressure pipe 68 are formed of a flexible pipe, for example, a flexible hose, and a connector 112a attached to a hose end of the high-pressure pipe 67 and a connector attached to a liquid supply port 48a of the hydraulic pressure control valve 39. 112a can be attached and detached with one touch.

According to the eighth embodiment, the effect is exhibited when the hydraulic pressure of the combined hydraulic drive unit is reduced and operation becomes impossible.

For example, in the case where the fluid tightness of the disconnecting switch hydraulic operating section 17 is poor, an operation of disconnecting the disconnecting switch hydraulic operating section 17 which is a defective portion from the hydraulic circuit becomes possible. That is, both the high pressure pipe 67 and the low pressure pipe 68 can be removed from the hydraulic pressure control valve 39 by the connectors 112a and 113a. At this time, by attaching a check valve to the connectors 112a and 113a, the outflow of the hydraulic fluid to the outside can be avoided, and the liquid tightness of this portion is maintained. Various measures are possible, such as removing only the disconnector hydraulic pressure operating section 17 for inspection and repair, or replacing it with a new one. If necessary, the hydraulic operation unit 16 for a circuit breaker having a good function can be used.
The operation of the disconnecting switch hydraulic operating section 18 can be continued as it is.

On the other hand, FIG. 13 shows that, in FIG. 12, after an abnormality has occurred in the circuit breaker hydraulic operating section 16, the accumulator 24, the pump 25, etc., the connection to the disconnecting switch hydraulic operating sections 17, 18 is cut off. High pressure hose 11 of auxiliary hydraulic pressure source 115
6. The hydraulic circuit diagram in which the low-pressure hose 117 is connected to the connectors 112a and 113a of the disconnector hydraulic operating section 17, respectively.

As shown in FIG. 13, by connecting an auxiliary hydraulic pressure source 115 from the outside, even if an abnormality occurs in the circuit breaker hydraulic pressure operating section 16, the accumulator 24, the pump 25, etc., the combined hydraulic pressure driving device Can be restored.

The auxiliary hydraulic pressure source 115 is provided with at least an electric or manual pump 118. If necessary, an auxiliary accumulator 120 and an auxiliary tank 121 are provided.
May be added. In particular, when the disconnecting switch 7a is opened, a relatively high-speed operation such as loop current interruption may be required. Even in an emergency, in such a case, an auxiliary for storing a certain amount of high-pressure hydraulic fluid is required. Accumulator 1
20 must be provided.

The same effect as described above can be obtained by using an on-off valve instead of the connector. Especially in the case of an on-off valve,
Hydraulic operating section 16 for circuit breaker and hydraulic operating sections 17 and 1 for disconnector
The flow path connecting to the flow path 8 is not limited to a flexible pipe, but is also effective for a flow path formed in a block as shown in FIG.

According to the eighth embodiment, even when the hydraulic pressure of the combined hydraulic drive device is reduced and operation becomes impossible, the inspection and repair and replacement work of the hydraulic operation unit can be performed without stopping the line. In addition, it is possible to provide a composite hydraulic drive device that can easily perform various measures such as a hydraulic pressure recovery operation.

[Other Embodiments] Although the embodiments of the present invention have been described from the first embodiment to the eighth embodiment, the embodiments of the present invention are not limited to the above embodiments. For example, an embodiment applied in combination with the configurations of the third to fifth embodiments is also included.

According to such an embodiment, security multiplexing can be achieved. Further, in each of the above embodiments, the insulator type switch 1 is targeted. However, the same applies to a downsized switchgear in which the contacts of the circuit breaker and the disconnector are housed not in the insulator tube but in a metal container. And the same function and effect can be exerted.

[0160]

According to the composite hydraulic drive device of the present invention, the disconnector is integrally formed with the circuit breaker, and both the contacts of the circuit breaker and the disconnector are accommodated in the insulator tube by the hydraulic drive system. By opening / closing drive, miniaturization and simplification can be achieved while ensuring high operation reliability, as well as excellent in assemblability, operability, and checkability, and can contribute to downsizing of the opening / closing device itself.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a combined hydraulic drive device according to the present invention.

FIG. 2 is an enlarged front view showing the vicinity of a mechanism box in the first embodiment.

FIG. 3 is a simplified plan view of the inside of the mechanism box from the side of the support insulator tube shown in FIG. 2;

FIG. 4 is a simplified hydraulic circuit diagram showing a first embodiment of a composite hydraulic drive device according to the present invention.

FIG. 5 is a hydraulic circuit diagram showing a second embodiment of the combined hydraulic drive device according to the present invention.

FIG. 6 is a partial configuration diagram showing a main part of a third embodiment of a composite hydraulic drive device according to the present invention.

FIG. 7 is a partial configuration diagram showing a main part of a fourth embodiment of a composite hydraulic drive device according to the present invention.

FIG. 8 is a partial configuration diagram illustrating a main part of a fifth embodiment of a composite hydraulic drive device according to the present invention.

FIG. 9 is a front sectional view showing a sixth embodiment of the combined hydraulic drive device according to the present invention.

FIG. 10 is a side sectional view showing a sixth embodiment of the composite hydraulic drive device according to the present invention.

FIGS. 11A and 11B are a front sectional view and a side view showing a seventh embodiment of a combined hydraulic drive device according to the present invention.

FIG. 12 is a hydraulic circuit diagram showing an eighth embodiment of the composite hydraulic drive device according to the present invention.

FIG. 13 is a hydraulic circuit diagram showing an eighth embodiment of the combined hydraulic drive device according to the present invention, in which an auxiliary hydraulic pressure source is provided.

FIG. 14 is a front sectional view showing a disconnector portion of a conventional gas insulated switchgear for electric power.

FIG. 15 is a side sectional view showing a section BB of the conventional power gas insulated switchgear shown in FIG. 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulator type switch 2, 2a, 2b Insulator tube 3 Metal container 5 Circuit breaker 6 Contact 7a, 7b Disconnector 8a First contact 8b Second contact 9,9a, 9b Fixed electrode 10,10a, 10b Movable electrode 11 Support insulator tube Reference Signs List 12 mechanism box 13, 13A hydraulic operating device 14, 14a, 14b insulating operating rod 15, 15a, 15b coupling mechanism 16 hydraulic operating unit for circuit breaker 17, 18 hydraulic operating unit for disconnector 20, 20a, 20b mounting frame 22 Hydraulic cylinder 23 Hydraulic pressure control valve 24 Accumulator 25 Pump 26 Hydraulic pressure monitor 27 Low pressure tank 30, 30a, 30b Manifold 32, 32a, 32b Hydraulic piston 33, 33a, 33b Piston rod 34, 34a, 34b Drive rod 35 Seal part 37,38 Hydraulic cylinder 39,40 Hydraulic control valve 43,43a, 4 b first cylinder chambers 44, 44a, 44b second cylinder chambers 45, 45a, 45b high-pressure channels 46, 46a, 46b switching valves 47, 47a, 47b control ports 48, 48a, 48b liquid supply ports 49, 49a, 49b drainage Liquid ports 50, 50a, 50b Electromagnetic coils for opening 51, 51a, 51b Electromagnetic coils for closing 54, 54a, 54b Low-pressure flow path 57 Accumulator piston 58 Back chamber 59 Liquid storage chamber 60 Casing 61 Discharge port 62 Suction port 67, 68 Liquid Pressure piping (flexible piping) 70 Piston holding mechanism 71 Reduced diameter portion 72 Peripheral groove 73 Lock pin (operating rod) 75 Holding cylinder 76 Lock piston 77 Spring (elastic body) 78 Cylinder chamber 80 Toggle device 81 Support portion 82 Flange 83 Telescopic rod mechanism 84 Operating rod 85 Spring (Elastic body) 88 Rod lock mechanism 89 Bracket 90, 91 Mounting hole 92 Lock pin 95 Outer cylinder 96 Cylinder head 97 Plug 98 Control flow path 99 Flow path 100 Valve block 101 Push rod 102 Cut-off damper piston 103 Input damper piston 104 Open circuit Damper chamber 105 Closing damper chamber 110 High pressure flow path 115 Auxiliary hydraulic pressure source 116 High pressure hose 117 Low pressure hose 118 Pump 120 Auxiliary accumulator 121 Auxiliary tank

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02B 13/04 H (72) Inventor Akio Kobayashi 1-5-9 Shiba, Minato-ku, Tokyo Sumitomo Real Estate Shiba Building Building No. 2 Toshiba Techno Consulting Co., Ltd. (72) Inventor Yoshiyoshi Kobayashi 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Fumio Nakajima Ukishima, Kawasaki-ku, Kawasaki-shi, Kanagawa 2-1 Town, Toshiba Hamakawasaki Factory (72) Inventor Tsutomu Tsutomu 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Toshiba Hamakawasaki Factory (72) Inventor Masaharu Shimizu Kawasaki, Kawasaki-shi, Kanagawa Prefecture (72) Inventor Hiroshi Furuta 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Pref. F-term in Shibahama Kawasaki Plant (reference) 5G017 AA12 AA13 AA14 BB01 BB02 HH02 JJ02 5G028 AA07 AA08 BB01 BB03 BB04 BB05 BB06 EB12

Claims (16)

[Claims] 1. A metal container having a hollow supporting insulator tube and a plurality of housing insulator tubes, a fixed electrode fixed in each of the housing insulator tubes, and a movable electrode housed in such a manner as to be detachable from the fixed electrode. Contact points of a circuit breaker and a disconnector having: an insulating gas sealed in the metal container, the supporting insulator tube and the housing insulator tube; an insulating operating rod housed in the supporting insulator tube; and the other end of the supporting insulator tube. Provided with a mechanism box provided, a hydraulically driven hydraulic operating device housed in the mechanism box, and a coupling mechanism provided in the metal container, and the operating force of the hydraulic operating device is provided. A composite hydraulic drive device wherein the insulated operation rod is transmitted to a movable electrode via a connection mechanism to open and close the respective contacts of the circuit breaker and the disconnector. 2. A hydraulic operating device comprising: a plurality of hydraulic cylinders for opening and closing contacts of a circuit breaker and a disconnecting switch in response to supply and discharge of a high-pressure fluid; and independently controlling each of the hydraulic cylinders. A plurality of hydraulic pressure control valves, an accumulator for storing the high pressure hydraulic fluid to be supplied to the plurality of hydraulic cylinders and the hydraulic pressure control valve, a pump for supplying the high pressure hydraulic fluid into the accumulator, and the hydraulic cylinder And a low-pressure tank for storing a low-pressure liquid discharged from the hydraulic pump. 3. The hydraulic operating device includes a hydraulic operating unit for a circuit breaker for driving the contacts of the circuit breaker to open and close, and a hydraulic operating unit for a disconnecting device for opening and closing the contacts of the disconnector. The hydraulic pressure operation unit for a circuit breaker is provided with a manifold that forms the hydraulic cylinder on the side of the circuit breaker, and an accumulator, a pump, a low-pressure tank, and a hydraulic pressure operation unit for the disconnector are detachably mounted on the manifold. 3. The combined hydraulic drive according to 1 or 2. 4. The hydraulic operating device according to claim 1, further comprising: a hydraulic operating unit for a circuit breaker for opening and closing the contacts of the circuit breaker; and a hydraulic operating unit for a disconnecting switch for opening and closing the contacts of the disconnector. 3. The hybrid hydraulic drive according to claim 1, wherein the disconnector hydraulic operating section and the circuit breaker hydraulic operating section are connected to each other by hydraulic piping. 5. The composite liquid according to claim 2, further comprising a piston holding mechanism for holding a position of a hydraulic piston in the accumulator when the high-pressure hydraulic fluid in the accumulator is lost. Pressure drive. 6. A telescopic rod mechanism for connecting a drive rod from a hydraulic piston with a flange integrally fixed thereto, a support part fixed in the mechanism box and the flange so as to be extendable and contractible, and the telescopic rod mechanism. 3. The composite hydraulic drive device according to claim 2, further comprising an elastic body for elastically holding the position of the hydraulic piston on the operating rod. 7. A drive rod from the hydraulic piston and a mounting hole that can be fitted to a support bracket fixed in a mechanism box, and the lock pin is inserted into both of the fitted mounting holes so that the hydraulic pressure is reduced. 3. The combined hydraulic drive according to claim 2, wherein a mechanism for holding a position of the piston is provided. 8. The hydraulic operating device includes a hydraulic operating unit for a circuit breaker that opens and closes the contacts of the circuit breaker, and a hydraulic operating unit for a disconnecting switch that opens and closes the contacts of the disconnector. A piston rod from a hydraulic piston of a disconnector hydraulic operating section is slid through the cylinder rod, and a cylinder head fixed to one end of the hydraulic cylinder is provided in the mechanism box. 3. The combined hydraulic drive according to claim 2, further comprising a valve. 9. The hydraulic operating device includes a circuit breaker hydraulic operating unit that opens and closes the contacts of the circuit breaker, and a disconnector hydraulic operating unit that opens and closes the contacts of the disconnector. An outer cylinder is provided substantially concentrically outside the hydraulic cylinder of the disconnector hydraulic operating unit to form a double cylinder, and an annular gap between the double cylinders is formed in a cylinder chamber in the hydraulic cylinder. 3. The combined hydraulic drive device according to claim 2, wherein the control passage is configured to be a control flow passage for supplying and discharging a high-pressure working fluid from the pressure control valve. 10. The hydraulic operating device, comprising: a breaker hydraulic operating unit that drives the contacts of the circuit breaker to open and close; and a disconnector hydraulic operating unit that drives the contacts of the disconnector to open and close. A hydraulic cylinder of a disconnector hydraulic operating section is mounted on a cylinder head fixed in the mechanism box, and a hydraulic control valve is provided on the opposite side of the cylinder head of the hydraulic cylinder. The combined hydraulic drive according to claim 2. 11. The hydraulic operating device includes a hydraulic operating unit for a circuit breaker for driving the contacts of the circuit breaker to open and close, and a hydraulic operating unit for a disconnecting switch for opening and closing the contacts of the disconnector. A hydraulic cylinder of a disconnector hydraulic operating section is mounted on a cylinder head fixed in the mechanism box, and a hydraulic control valve is provided on the opposite side of the hydraulic cylinder cylinder head; An outer cylinder is provided substantially concentrically outside the hydraulic cylinder of the dexterous hydraulic operating section to form a double cylinder, and an annular gap between the double cylinders causes a high pressure from the accumulator to the cylinder chamber in the hydraulic cylinder. 3. The combined hydraulic drive device according to claim 2, wherein the combined hydraulic drive device is configured to be a high-pressure flow path that constantly supplies a fluid. 12. The hydraulic operating device according to claim 1, further comprising a circuit breaker hydraulic operating unit that opens and closes the contacts of the circuit breaker, and a disconnector hydraulic operating unit that opens and closes the contacts of the disconnector. The piston rod is slid from the hydraulic piston of the disconnector hydraulic operating section, and the cylinder head fixed to the hydraulic cylinder is fixed in the mechanism box.A hydraulic control valve is attached to the cylinder head. 3. The combined hydraulic drive according to claim 2, wherein the operating axis of the hydraulic control valve and the operating axis of the hydraulic piston are orthogonal to each other. 13. The hydraulic operating device according to claim 1, further comprising: a hydraulic operating unit for a circuit breaker that drives the contacts of the circuit breaker to open and close; and a hydraulic operating unit for a disconnector that drives the contacts of the disconnector to open and close. The composite hydraulic pressure according to claim 2, wherein at least one or more on-off valves are provided in the middle of the high-pressure and low-pressure passages that connect the circuit breaker hydraulic operation unit and the disconnector hydraulic operation unit. Drive. 14. The hydraulic operating device according to claim 1, further comprising: a hydraulic operating unit for a circuit breaker that drives the contacts of the circuit breaker to open and close; and a hydraulic operating unit for a disconnector that drives the contacts of the disconnecting switch to open and close. The high pressure and low pressure flow paths connecting the circuit breaker hydraulic operating section and the disconnecting switch hydraulic operating section are formed by flexible piping, and at least one connector with a check valve is provided on the way. 3. The combined hydraulic drive according to claim 2, wherein: 15. The hydraulic operating device according to claim 1, further comprising a hydraulic operating unit for a circuit breaker for opening and closing the contacts of the circuit breaker, and a hydraulic operating unit for a disconnecting switch for opening and closing the contacts of the disconnector. The composite according to claim 2, wherein an auxiliary hydraulic pressure source having at least one or more electric or manual pumps is connectable to the circuit breaker hydraulic operating section or the disconnector hydraulic operating section. Type hydraulic drive. 16. The hydraulic operating device according to claim 1, further comprising: a circuit breaker hydraulic operating unit that drives the contacts of the circuit breaker to open and close; and a disconnector hydraulic operating unit that drives the contacts of the disconnector to open and close. An auxiliary hydraulic pressure source having at least one or more electric or manual pumps in the circuit breaker hydraulic operating unit or the disconnector hydraulic operating unit, an auxiliary accumulator for storing high-pressure hydraulic fluid, and discharged from the hydraulic cylinder 3. The combined hydraulic drive according to claim 2, further comprising an auxiliary tank for storing a low-pressure liquid.