JP2021072164A - Gas circuit breaker - Google Patents

Abstract

To provide a gas circuit breaker capable of reducing effect of vibration due to a spring operation unit on auxiliary equipment or an instrument while suppressing decrease in transfer efficiency of driving force in the spring operation unit and a mechanism section during an open circuit operation and a closed circuit operation of the gas circuit breaker by suppressing the vibration of the spring operation unit when the spring operation unit is operated.SOLUTION: A gas circuit breaker includes a cutout tank 2, a spring operation unit 3, a mechanism section 4 and a frame 5. The mechanism section 4 is attached to a flange 23 provided to an end of the cutout tank 2. The spring operation unit 3 has an upper part attached to a support member 31 attached to the mechanism section 4 and a lower part supported by a member fixed to the flange 23. The cutout tank 2 is supported on the frame 5 by a leg 24 that is provided on the upper part of the frame such that the lower end of the spring operation unit 3 is located above the upper face of the frame 5, and a leg 25 configured by extending the flange 23 downward. Auxiliary equipment or an instrument 11 is provided below the mechanism section 4.SELECTED DRAWING: Figure 1

Description

The present invention relates to a gas circuit breaker.

In recent years, the application of spring operators using metal springs as a drive source has become widespread in gas circuit breakers used in high-voltage power systems. The spring actuator has an advantage that maintenance work such as simplification of patrol inspection can be saved compared to the conventionally applied hydraulic actuator.
As a gas circuit breaker using a spring operator, there is one described in Patent Document 1. In Patent Document 1, the shutoff spring case and the plate member provided on the closing spring case are fixed to the gantry via a support or the like, so that the shutoff spring and the closing spring case when the closing spring operates at high speed are closed. It is described that the vibration of the spring case in the vertical direction can be suppressed, and the driving efficiency of the mechanism of the actuator and the mechanism portion during the opening and closing operations can be improved.

JP-A-2017-195153

However, in Patent Document 1, in addition to the spring and the spring drive mechanism, the attachment location of the auxiliary device such as the auxiliary switch which is indispensable as the gas circuit breaker and the instrument such as the gas density meter is not examined. Normally, the instrument is installed on the interface side of the operation box for convenience. According to the study by the present inventors, there is a concern that the contacts of, for example, auxiliary devices and instruments may malfunction due to vibration when the spring actuator is operated. Further, in order to prevent malfunction of the contacts of the auxiliary equipment and the instrument due to vibration, it is conceivable to install the auxiliary equipment and the instrument away from the spring operator, but this leads to an unnecessarily large operation box.

An object of the present invention is to suppress the vibration of the spring operator when the spring operator is operated, and to suppress a decrease in the transmission efficiency of the driving force in the spring operator and the mechanism during the opening and closing operations of the gas breaker. However, it is an object of the present invention to provide a gas breaker capable of reducing the influence of vibration by a spring operator on an auxiliary device or an instrument.

In the present invention, the gas circuit breaker is configured as described in the claims in order to solve the above problems. Specifically, in the gas circuit breaker of the present invention, for example, a space is secured so that the instrument can be attached to the flange of the circuit breaker tank, and the instrument is attached to the flange of the circuit breaker tank to vibrate by the spring operator. Is made difficult to convey.

According to the present invention, the vibration of the spring operator when the spring operator is operated is suppressed, and the decrease in the transmission efficiency of the driving force in the spring operator and the mechanism unit during the opening and closing operations of the gas breaker is suppressed. However, it is possible to reduce the influence of vibration by the spring operator on the auxiliary device or the instrument.
Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

It is a perspective view of the appearance of the gas circuit breaker which is one Example of this invention. It is a partially cutaway side view which also showed the electrode of the inside of the circuit breaker tank in the gas circuit breaker which is one Example of this invention. It is a perspective view which cut the cutoff part tank in the gas breaker which is one Example of this invention in the longitudinal direction. It is a perspective view which shows the state which attached the operation box to the gas circuit breaker which is one Example of this invention.

Hereinafter, examples of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the gas circuit breaker 1 includes a circuit breaker tank 2, a spring operator 3, a mechanism 4, and a gantry 5.

The blocking unit tank 2 is composed of, for example, a cylindrical member, and an insulating gas is sealed inside. The cutoff tank 2 is arranged with the length direction of the cylinder as the horizontal direction. As shown in FIG. 2, a fixed electrode 21 and a movable electrode 22 are provided inside the shutoff tank 2. The driving force of the spring actuator 3 is transmitted to the movable electrode 22 via the mechanical portion 4, and the movable electrode 22 operates so as to be in contact with or not in contact with the fixed electrode 21.

A flange 23 is provided at one end of the shutoff tank 2 in the longitudinal direction. The operation box (covering member) 9 shown in FIG. 4 is attached to the outer peripheral portion of the flange 23. The operation box 9 is provided so as to cover the entire mechanism unit 4 and the spring operator 3, so that even the gas circuit breaker 1 installed outdoors can ensure waterproofness. The flange 23 is formed so as to extend in the ground direction (downward direction) as described later.

The mechanism frame 41 constituting the mechanism 4 is attached to the flange 23, and the mechanism 4 is supported by the shutoff tank 2 via the flange 23.

The back plate 32 is attached to the side of the mechanism frame 41 opposite to the blocking tank 2 side. A frame (support member) 31 to which the spring actuator 3 is attached is fixed (fastened) on the surface of the back plate 32 opposite to the mechanism portion frame 41 side. The spring actuator 3 is provided in the cutoff tank 2 via the frame 31 and the mechanism 4, and is located on the side opposite to the cutoff tank 2 side of the mechanism 4.

As shown in FIG. 2, the spring operator 3 includes a shutoff spring 33 and a closing spring 34, and operates the movable electrode 22 (opening and closing) using the shutoff spring 33 and the closing spring 34 as power sources. The shut-off spring 33 and the closing spring 34 are housed in a cylindrical shut-off spring case 36 and a cylindrical closing spring case 37, respectively. Further, the shutoff spring case 36 is arranged on the mechanical portion 4 side of the spring operator 3, and the closing spring case 37 is arranged on the opposite side thereof.

The mechanism unit 4 connects the movable electrode 22 side and the spring operator 3 side, and transmits the power from the spring operator 3 to the movable electrode 22. The mechanism portion 4 is composed of a mechanism portion frame 41, a blocking portion rod 42, a mechanism portion lever 43, and a driving force transmission rod 44. The mechanism unit frame 41 is provided with a mechanism unit lever 43 and the like constituting the mechanism unit 4 housed therein. One end of the blocking rod 42 is connected to the movable electrode 22 as shown in FIG. 2, and the movable electrode 22 is driven by the driving force from the spring operator 3. One end of the driving force transmission rod 44 that transmits the driving force from the spring operator 3 is connected to the mechanism lever 43, and the driving force of the spring operator 3 is transmitted to the blocking rod 42. The other end of the driving force transmission rod 44 is connected to the actuator lever 35 in the spring actuator 3. A shutoff spring 33 is connected to the actuator lever 35 via a cutoff spring rod (not shown). The actuator lever 35 is supported by a shaft supported by a frame 31 in the spring actuator 3, and is rotatably supported in the spring actuator 3. Further, an actuator lever for a closing spring (not shown) is supported on a shaft that supports the actuator lever 35, and a closing spring rod (not shown) is used to feed the actuator lever for the closing spring. The spring 34 is connected.

The spring operator 3 causes the gas circuit breaker 1 to operate as follows. In FIG. 2, the blocking spring 33 and the closing spring 34 are in the compressed state, and the contact points between the fixed electrode 21 and the movable electrode 22 are in the closing state. When an opening command is input to the gas circuit breaker 1 in this state, a known circuit breaker control mechanism in the spring operator 3 (not shown) operates, and the circuit breaker 33 extends downward. Then, the operator lever 35 rotates counterclockwise using the operation of the cutoff spring 33 as a power source, and the movement of the operator lever 35 is movable via the driving force transmission rod 44, the mechanism part lever 43, and the cutoff part rod 42. The electrode 22 is transmitted and pulls the movable electrode 22 away from the fixed electrode 21.
Further, when a closing command is input to the gas circuit breaker 1, a known closing control mechanism in the spring operating device 3 (not shown) operates to extend the closing spring 34 downward. Then, using the operation of the spring when the closing spring 34 is extended as a power source, the operator lever for the closing spring is rotated clockwise to push the movable electrode 22 into the fixed electrode 21 and the shutoff spring 33. Is compressed again.
After that, the closing spring 34 that has been fully extended by such a closing operation is compressed again by a known electric motor and speed reducer in the spring operator 3 (not shown). The closing operation of the closing spring 34 causes a high-speed extension operation, and recompression of the closing spring 34 generally operates between 10 seconds and 15 seconds. On the other hand, the shutoff spring 33 operates at high speed in any of the opening and closing operations of the gas breaker 1.

Next, the support structure of the cutoff tank 2 will be described. In this embodiment, by devising the support structure of the shutoff tank 2, the installation space for auxiliary equipment and instruments, which is less affected by the vibration of the spring actuator 3, is secured.
In this embodiment, the blocking tank 2 is supported and fixed by the gantry 5 via the legs 24 and 25 mounted on the gantry 5. The leg portion 24 supports the blocking portion tank 2 on the gantry 5 on the side opposite to the mechanism portion 4 and the spring operator 3 side of the blocking portion tank 2. The installation portion of the leg portion 24 is fixed to the upper surface of the gantry 5. In this embodiment, the mechanism portion 4 and the spring operator 3 side of the cutoff portion tank 2 are supported on the gantry 5 by using a flange 23 that is in contact with the cutoff portion tank 2. That is, in this embodiment, the flange 23 is extended in the ground direction (downward direction), the installation portion on the gantry 5 is attached to the lower portion of the flange 23 extended in the ground direction, and the mechanism portion 4 and the spring are attached by the flange 23 and the installation portion. The legs 25 on the controller 3 side are configured. A leg portion having the same configuration as the leg portion 24 may be provided separately from the flange 23 to support the mechanism portion 4 and the spring actuator 3 side of the blocking portion tank 2. However, it is desirable to extend the flange 23 in the ground direction to form the leg portion 25 due to the small number of parts and the small number of man-hours.

Also in Patent Document 1, the cutoff tank is fixed to the gantry via the tank legs in the vicinity of both ends in the longitudinal direction of the cutoff tank. However, in Patent Document 1, the tank leg portion prevents the blocking portion tank from tipping over on the gantry, the length of the tank leg portion in the vertical direction (vertical direction) is short, and the lower surface of the blocking portion tank is short. There is almost no distance between the pedestal and the upper surface of the gantry. In this embodiment, the length of the leg portion 25 using the leg portion 24 and the flange 23 in the vertical direction (vertical direction) is lengthened (the leg portion 25 using the leg portion 24 and the flange 23 is extended in the ground direction). The distance between the lower surface of the shutoff tank 2 and the upper surface of the gantry 5 is large.

In this embodiment, the lengths of the legs 25 using the legs 24 and the flanges 23 are set as follows. That is, in Patent Document 1, the lower ends of the blocking spring case and the closing spring case are located on the ground side (lower side) of the top surface (upper surface) of the gantry, whereas in this embodiment, the blocking spring is located. The lengths of the legs 25 using the legs 24 and the flanges 23 are set so that the lower ends of the case 36 and the input spring case 37 are located on the top side (upper side) of the top side surface (upper surface) of the gantry 5. There is. By setting the length of the leg portion 25 using the leg portion 24 and the flange 23 in this way, a large space can be formed between the lower surface of the mechanical portion 4 and the upper surface of the gantry 5.

The gantry 5 is composed of, for example, L-shaped steels 60 to 66 and plate steel materials 67 to 68 having an L-shaped cross section, and the installation portion 69 provided at the lower part of the L-shaped steels 61 and 62 is fixed to the ground. Two L-shaped steels 60 forming the upper surface of the gantry 5 are provided at the lower part of the blocking tank 2 with the longitudinal direction of the blocking tank 2 as the longitudinal direction. Plate steel materials 67 and 68 having an L-shaped cross section are provided at both ends of the L-shaped steel 60 in the longitudinal direction, and the upper surfaces of the plate steel materials 67 and 68 having an L-shaped cross section are the mounting surfaces of the leg portions 24 and the installation portions of the leg portions 25. It becomes.

As described above, in the present embodiment, the length of the leg portion 25 using the leg portion 24 and the flange 23 is lengthened, but this is such that the blocking portion tank 2 is supported by the upper and lower split legs. It can be said that it was done. That is, the blocking tank 2 is supported by a two-stage structure consisting of a leg portion (a leg portion whose lower end is located on an installation surface such as the ground) constituting a normal gantry 5 and a leg portion whose lower end is located on the gantry 5. .. As a result, a large space can be formed between the lower surface of the mechanism portion 4 and the upper surface of the gantry 5.

Next, in the present embodiment, the vibration of the spring actuator 3 when the spring actuator 3 is operated is suppressed, and the driving force of the spring actuator 3 and the mechanism unit 4 during the opening and closing operations of the gas breaker 1 is exerted. A configuration for suppressing a decrease in transmission efficiency will be described.
In Patent Document 1, by fixing the plate member provided on the shutoff spring case and the closing spring case to the gantry via a support or the like, the shutoff spring and the closing spring case and the closing spring when the closing spring operates at high speed are used. The vibration in the vertical direction of the case is suppressed, and the driving efficiency of the mechanism of the actuator and the mechanism unit during the opening and closing operations is improved. In this embodiment, the lower ends of the blocking spring case 36 and the closing spring case 37 are located on the top side (upper side) of the top side surface (upper surface) of the gantry 5. Therefore, the plate member (fixing member) 38 that connects the shutoff spring case 36 and the input spring case 37 cannot be connected to the gantry 5. Therefore, in this embodiment, the plate member 38 that connects the shutoff spring case 36 and the closing spring case 37 is connected to the flange 23. However, the structure is not such that the plate member 38 is extended to the flange 23, but the plate member 38 is connected to the flange 23 via the vibration suppression support 8. The vibration suppression support 8 has a rectangular frame-like shape, and as shown in FIGS. 1 and 2, the width in the vertical direction is large so that the cross-sectional coefficient of the member in the longitudinal direction (horizontal direction in the drawing) is large. A support portion (fixing member) attached to the end portion of the plate member 38 is provided at the end portion on the flange 23 side in the longitudinal direction and the end portion on the plate member 38 side. ) A mounting surface with 7 is provided. As shown in FIGS. 1 to 3, the flange 23, the support portion 7, and the vibration suppression support 8 are provided with a plurality of holes, and the flange 23 and the vibration suppression support 8 are provided through these holes. The vibration suppression support 8 and the support portion 7 are bolted to each other. In this way, the lower part of the spring actuator 3 is fixed to the flange 23 via the plate member 38, the support portion 7, and the vibration suppression support 8. The plate member 38, the support portion 7, and the vibration suppression support 8 also mean that the shutoff spring case 36 and the input spring case 37 are fixed to the gantry 5 via the flange 23.

The plate member 38 connecting the shutoff spring case 36 and the closing spring case 37, the support portion 7, and the vibration suppression support 8 realize the vibration suppression of the spring operator 3. In this embodiment, vibration suppression is realized as follows.

The upper portion of the spring actuator 3 is fixed to the flange 23 via the frame 31, the back plate 32, and the mechanical portion 4. Then, in this embodiment, the lower portion of the spring actuator 3 is fixed to the flange 23 via the plate member 38, the support portion 7, and the vibration suppression support 8. That is, it is fixed to the flange 23 at the upper part and the lower part of the spring actuator 3. Therefore, even if the blocking spring 33 operates at high speed in the blocking spring case 36, the blocking spring case 36 is fixed to the gantry 5 via the flange 23 by the plate member 38, the support portion 7, and the vibration suppression support 8. In addition, the vibration of the blocking spring case 36 in the vertical direction is suppressed. Therefore, it is possible to improve the driving efficiency of the mechanisms of the spring actuator 3 and the mechanism unit 4 at the time of opening the circuit.
Similarly, even if the closing spring 34 operates at high speed in the closing spring case 37 by the closing operation, the closing spring case 37 is fixed to the gantry 5 via the flange 23 by the plate member 38, the support portion 7, and the vibration suppression support 8. Therefore, the vibration of the closing spring case 37 in the vertical direction is suppressed. Therefore, it is possible to improve the driving efficiency of the mechanisms of the spring actuator 3 and the mechanism unit 4 at the time of closing the circuit.

In this way, while suppressing the vibration of the spring operator when the spring operator is operated and suppressing the decrease in the transmission efficiency of the driving force in the spring operator and the mechanism during the opening and closing operations of the gas breaker, In this embodiment, the influence of vibration by the spring operator on the auxiliary device or the instrument is further reduced.
In order to prevent malfunction of the contacts of the auxiliary equipment and the instrument due to vibration, it is conceivable to install the auxiliary equipment and the instrument away from the spring operating device 3, but this leads to making the operation box 9 larger than necessary. By attaching the auxiliary device or instrument to the flange 23, the present inventors prevent the vibration from the spring operator 3 from being directly transmitted, and reduce the influence of the vibration by the spring operator 3 on the auxiliary device or instrument. We found that the structure was valid. However, with the structure as described in Patent Document 1, it is difficult to secure a space for attaching the auxiliary device or the instrument to the flange 23. Therefore, in this embodiment, the leg portion 24 and the leg portion 25 using the flange 23 are extended downward to secure a space 10 for mounting an auxiliary device or an instrument. This space 10 is a place inside the operation box 9 and as far as possible from the spring operator 3 which is a vibration source by extending the leg 25 using the leg 24 and the flange 23 downward. But also. In addition, the space 10 according to the present embodiment can secure an area that facilitates maintenance work of the auxiliary equipment, which leads to improvement in the reliability of the operation of the auxiliary equipment and the instrument. Further, in the present embodiment, the operation box 9 can be small enough to cover the spring operator 3 and the mechanism portion 4, and then auxiliary devices and instruments can be installed in the operation box 9.

In this embodiment, an instrument (gas density meter or the like) 11 is supported by a support (not shown) fixed to the flange 23 separately from the vibration suppression support 8, and vibration by the spring actuator 3 is caused by the plate member 38. , The support unit 7 and the vibration suppression support 8 are prevented from being transmitted to the instrument 11.

Further, in this embodiment, since the lower ends of the blocking spring case 36 and the closing spring case 37 are configured to be located on the top side of the gantry 5 so as not to interfere with the gantry 5. Can be configured. Therefore, unlike the gas circuit breaker described in Patent Document 1, it is not necessary to provide a notch in the operation box. Therefore, in this embodiment, the operation box 9 is superior to Patent Document 1 in terms of workability and waterproofness.

The present invention is not limited to the above-described examples, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

1 ... Gas breaker, 2 ... Breaking part tank, 3 ... Spring operator, 4 ... Mechanical part, 5 ... Stand, 7 ... Support part (fixing member), 8 ...・ ・ Vibration suppression support, 9 ・ ・ ・ Operation box (covering member), 10 ・ ・ ・ Space (auxiliary equipment and instrument mounting space), 11 ・ ・ ・ Instrument, 21 ・ ・ ・ Fixed electrode, 22 ・ ・ ・ Movable electrode , 23 ... Flange, 24, 25 ... Legs, 31 ... Frame (support member), 32 ... Back plate, 33 ... Blocking spring, 34 ... Input spring, 35 ...・ Operator lever, 36 ... shutoff spring case, 37 ... input spring case, 38 ... plate member (fixing member), 41 ... mechanism frame, 42 ... shutoff rod, 43.・ ・ Mechanism part lever, 44 ・ ・ ・ Driving force transmission rod, 60 to 66 ・ ・ ・ L-shaped steel, 67, 68 ・ ・ ・ L-shaped cross-section plate steel material, 69 ・ ・ ・ Installation part.

Claims (7)

A blocking tank with a built-in fixed electrode and movable electrode,
A spring operator provided with a breaking spring and a closing spring and generating power to operate the movable electrode, and a spring operator.
A mechanism unit that connects the movable electrode side and the spring operator side and transmits power from the spring operator to the movable electrode.
A pedestal for supporting the blocking tank is provided.
The mechanical portion is attached to a flange provided at one end in the longitudinal direction of the blocking portion tank.
The upper part of the spring operator is attached to a support member attached to the side opposite to the attachment part of the mechanism part to the shutoff part tank, and the lower part is supported by a member fixed to the flange.
The blocking tank is supported on the gantry so that the lower end of the spring actuator is located above the upper surface of the gantry.
A gas circuit breaker, characterized in that an auxiliary device or instrument is provided below the mechanism. In the gas circuit breaker according to claim 1,
A gas circuit breaker characterized in that the circuit breaker tank is supported by a leg portion provided on an upper portion of the gantry and a leg portion formed by extending the flange downward. A blocking tank with a built-in fixed electrode and movable electrode,
A spring operator provided with a breaking spring and a closing spring and generating power to operate the movable electrode, and a spring operator.
A mechanism unit that connects the movable electrode side and the spring operator side and transmits power from the spring operator to the movable electrode.
A pedestal for supporting the blocking tank is provided.
The mechanical portion is attached to a flange provided at one end in the longitudinal direction of the blocking portion tank.
The upper part of the spring operator is attached to a support member attached to the side opposite to the attachment part of the mechanism part to the shutoff part tank, and the lower part is supported by a member fixed to the flange.
The blocking tank is supported by a leg provided on the upper part of the gantry and a leg formed by extending the flange downward.
A gas circuit breaker, characterized in that an auxiliary device or instrument is provided below the mechanism. In the gas circuit breaker according to claim 3,
The circuit breaker tank is mounted on the gantry by means of legs provided on the upper part of the gantry so that the lower end of the spring actuator is located above the upper surface of the gantry and legs formed by extending the flange downward. A gas circuit breaker characterized by being supported by. In the gas circuit breaker according to any one of claims 1 to 4.
A gas circuit breaker, wherein the auxiliary device or the instrument is attached to a support member attached to the flange, which is separate from the member fixed to the flange. In the gas circuit breaker according to any one of claims 1 to 5,
A gas circuit breaker provided with a covering member that covers all of the mechanism, the spring operator, the auxiliary device, or the instrument. In the gas circuit breaker according to any one of claims 1 to 6.
The members fixed to the flange that support the lower part of the spring operator are provided at the end of the plate member and the plate member that supports the case that houses the circuit breaker spring and the input spring that make up the spring operator. A gas circuit breaker comprising a support portion and a member fixed to the flange and connected to the support portion.

Images