JPH0454809A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To absorb impact effectively and to prevent transmission of impact to the outside by disposing an impact absorbing operating unit, which functions synchronously with a gas insulated circuit breaker to oppose its impact, in the enclosure of the gas insulated circuit breaker. CONSTITUTION:An impact absorbing operating unit 30 is mounted on the operational mechanism box 1 of a gas insulated circuit breaker 20 and operated synchronously with the gas insulated circuit breaker 20. A lever 33 provided with a rack is coupled through a link mechanism to the lower end of a movable section 32 which penetrates through the upper face of a supporting member 31 secured to the bottom face of the operational mechanism box 1. Upon commanding interruption of the circuit breaker 20, an operating rod 3 descends abruptly and compressed by an operating cylinder 2 to produce an upward impact F1 on a base 22. At the same time, pinion 34 of an impact absorbing operating unit 30 rotates to cause rotation of the lever 33 provided with rack thus stretching a spring member 36. Consequently, the movable section 32 descends to exert a downward impact F3 on the base 22. The impacts F1 and F3 are canceled to prevent transmission of impact to the outside.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to gas-insulated switches such as gas circuit breakers, disconnectors, and earthing switches. This relates to a gas insulated switch that aims to reduce the impact force transmitted to the (base).

(Prior art) In recent years, gas insulated switchgear has increased in capacity and is becoming a large-scale facility.
Using b-gas as an insulating medium, when a ground fault is detected in the power transmission system, the system operates quickly to isolate the faulty system and prevent the accident from spreading.

However, because these gas circuit breakers operate at extremely high speeds, they generate extremely large impact forces and noise, which can be a major hindrance to the operation of some substations.

In particular, due to the recent increase in demand for electricity in large cities, large-scale substations have been increasingly opened in the basements of buildings in the city center, which has caused various problems. For example, in buildings in the city center, substations are often located on the second basement floor, and restaurant facilities are located on the first basement floor. This may cause problems if it is communicated, and complaints such as a decrease in sales have been received. Therefore, it is necessary to reduce the operational vibration of the gas circuit breaker itself or to limit the transmission path of the vibration generated during operation.

5 to 7 show the structure of a conventionally used gas circuit breaker and the load applied to the floor surface during its operation.

That is, in FIG. 5, 1 is an operating mechanism box, 2 is an operating cylinder, 3 is an operating rod, 4°9 is an insulating cylinder, 5.6 is a conductor, 7 is a movable side electrode, 8 is a fixed side electrode, and 14 is a The insulating rod 15 is a current-carrying contact. Then, in order to connect and disconnect the movable electrode 7 and the fixed electrode 8, the movable electrode 7 and the operating rod 3 are moved at high speed. Then,
When the movable electrode 7 starts and stops moving, an impact force F1 as shown in FIG. 6(A) is applied. F2 occurs.

At this time, the impact force F1. F
Loads R1 and R2 corresponding to 2 and having the natural frequency of the equipment
is added to the floor surface as a whole, as shown in Figure 6 (D), the floor surface load R (= Rt + R2
) comes into play.

Therefore, in order to prevent this impact force from being transmitted to the outside, conventionally, as shown in FIG. An elastic body 23 such as anti-vibration rubber is disposed between the first base 22 and a second base 24 fixed to the floor 25 to provide gas-insulated opening/closing. It supported the entire device.

(Problems to be Solved by the Invention) However, the conventional gas circuit breaker configured as described above has the following problems to be solved. That is, in order to prevent the transmission of the impact force generated during the operation of the gas circuit breaker as described above, it is necessary to set the overall natural frequency to at least a few fractions of the impact frequency during operation. It was necessary to use an elastic body 23 with a low spring constant as a support member disposed between the bed 22 and the floor 25. As a result, when assembling the gas-insulated switchgear, the elastic body 2
The gas circuit breaker 2 is placed on the first base 22 disposed on the gas circuit breaker 2
Each gas insulated device 21 must be placed and connected starting from the gas insulated device 0, and due to differences in the weight of each device, it is difficult to locate the mutual connection of the devices, and it takes a lot of time and effort to adjust the dimensions. Was. Furthermore, other insulating equipment is connected to the gas circuit breaker, and the displacement of the gas circuit breaker during operation can put undue force on these connections, resulting in gas leakage, breakage, etc. . Furthermore, since the entire gas insulated switchgear is disposed on the first base 22 supported by the elastic body 23, it is thought that it will exhibit a large vibration response in the event of an earthquake, and a countermeasure has been desperately needed.

As described above, in the conventional gas circuit breaker, no means has been established to limit the impact force generated during operation, and it has not been possible to reduce the impact force applied to the floor surface. Further, when a method of supporting the entire gas insulated switchgear including a gas circuit breaker using an elastic body is used, there are problems such as an increase in displacement when an earthquake occurs.

The present invention was made to solve the above-mentioned drawbacks of the prior art, and its purpose is to efficiently absorb the impact force generated during the operation of a gas-insulated switch and reduce the transmission of the impact force to the outside. The object of the present invention is to provide a gas insulated switch with excellent stability and reliability.

[Structure of the Invention] (Means for Solving the Problems) The gas insulated switch of the present invention operates in synchronization with an operation command issued to the gas insulated switch within its operation mechanism box, and the operation The present invention is characterized in that a shock absorbing operating device is provided so that the shock force generated by the gas insulated switch acts in the opposite direction to the shock force generated by the gas insulated switch.

(Function) In the gas insulated switch of the present invention, the shock absorbing operating device is operated in synchronization with the opening/closing operation of the gas insulated switch, and acts in the direction of canceling out the impact force generated by the opening/closing operation of the gas insulated switch. By generating an impact force that
Since the impact force can be absorbed by each gas insulated switch, the impact force applied to the outside can be significantly reduced.

(Example) Hereinafter, an example of the present invention will be specifically described based on FIGS. 1 and 2. Note that the same members as those of the conventional type shown in FIG. 5 are given the same reference numerals, and explanations thereof will be omitted.

In this embodiment, as shown in FIG. It is configured to operate in synchronization with the issued operation command. Further, the impact force generated by the shock absorbing operating device 30 is configured to act in the opposite direction to the impact force generated by the gas circuit breaker.

In the embodiment shown in FIG. 1, the shock absorbing operation bag M30 is constructed as described below. That is, a box-shaped support member 3 fixed to the floor of the operating mechanism box 1
A movable part 32 is disposed to penetrate through the upper surface of 1. A lever with a rack 33 is connected to the lower end of the movable portion 32 via a link mechanism, and the lever with a rack 33 is configured to interlock with a pinion 34 connected to a motor or a manual handle. Further, an upper flange 32a is formed at the upper end of the movable portion 32, and a first spring member 35 is attached between the upper flange 32a and the upper surface of the support member 31. On the other hand, a lower flange 32b is formed at the lower part of the movable part 32, and a second spring member 36 is attached between the lower flange 32b and the support member 31. Further, inside the box-shaped support member 31, a stopper 37 is provided which engages with the lower flange 31b of the movable part 32 to stop the movable part 32 from moving up and down. Then, normally, by operating a motor or a manual handle, the second spring member 36 is compressed via the pinion 34 and the racked lever 33, and the movable part 32 is positioned upward. Note that, since the gas circuit breaker operates very rarely, the operation of accumulating the second spring member 36 may be performed as appropriate by operating the motor or the manual handle.

In the gas circuit breaker of this embodiment having such a configuration, the impact force generated during operation can be reduced by using the persimmon described below. That is, when a shutdown command is issued to the gas circuit breaker 20, the operating rod 3 disposed within the operating mechanism box 1 is rapidly pushed downward. Then, the first base 22 on which the gas circuit breaker 20 is installed is first subjected to an upward impact force F1 as shown in FIG. Impact force F2 acts.

On the other hand, when the shock absorbing operating device 30 is activated in synchronization with the shutdown command issued to the gas circuit breaker 20, the second spring member 3
6 is compressed and the movable part 32 that was located above is pulled down, so that the first base 22 has the position shown in FIG.
An impact force F3 as shown in B) acts. At this time, on the floor where the gas circuit breaker 20 is installed, as shown in FIGS.
As shown in , each impact force F1. Loads R1- and R2 with natural frequencies of equipment corresponding to F3 and F2
is added to the floor surface as a whole, as shown in Figure 3 (E), the floor surface load R= (=R, -
+R2) acts. In this case, as described above, the impact force F1 acting in the opposite direction. Since F3 cancel each other out, the floor load R1= corresponding to the impact force of the first wave is significantly reduced compared to the conventional load R1, as shown in Figure 2 (C), so the overall The floor load R'' (=R, -10R2) is also significantly reduced compared to the conventional floor load R (=R, 10R2).Furthermore, the upward impact force F1 and the downward impact force If the force F3 is matched, the floor load Rt −
= 0 can also be set. Therefore, the overall floor load R'' (=R, -+R2) is determined only by R2, and the influence of R,= can be made very small. For comparison, the conventional loads shown in FIGS. 6(B) to 6(D) are indicated by dotted lines.

In this way, according to this embodiment, by disposing the shock absorbing operating device that operates in synchronization with the shutoff command issued to the gas circuit breaker in the operating mechanism box of the gas circuit breaker, it is possible to The applied upward impact load has been reduced from the conventional Rml to Rml.
-, and the downward impact load is changed from the conventional Rm2 to Rm
It can be reduced to 2-.

Note that the present invention is not limited to the above-mentioned embodiments, but if the movable part is configured to synchronize the stop timing with the gas circuit breaker stop timing, the floor load after the second wave can be reduced. , the impact force can be reduced more effectively.

The shock absorbing operating device may also be one that utilizes hydraulic pressure, as shown in FIG. That is, a shock absorbing operating device 40 consisting of an operating cylinder 41 and a piston 42 that moves up and down inside the operating cylinder 41 is connected to the operating mechanism box 1 of the gas circuit breaker.
The piston 42 moves into the liquid chamber 41 in the operation cylinder 41 in synchronization with the operation command issued to the gas circuit breaker.
a, 41b so as to move up and down. The piston 42 operates so that the impact force generated by its vertical movement acts in the opposite direction to the impact force generated by the gas circuit breaker. Furthermore, the fourth
As shown in the figure, the piston 43 may be housed within the operating cylinder 41. Both the embodiments shown in FIGS. 3 and 4 provide the same effects as the embodiment shown in FIG. 1. Furthermore, the present invention can be similarly applied to gas-insulated switches such as disconnectors and earthing switches.

[Effects of the Invention] As described above, according to the present invention, the operation mechanism box of the gas insulated switch operates in synchronization with the operation command issued to the gas insulated switch, and the operation By installing a shock-absorbing operating device that acts in the opposite direction to the impact force generated by the gas-insulated switch, the impact force generated when the gas-insulated switch is operated can be efficiently absorbed, and the external It is possible to provide a gas insulated switch with excellent stability and reliability that can reduce the transmission of impact force to.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a gas circuit breaker showing an embodiment of the present invention;
Figure 2 shows the effect of the present invention, in which (A) is the impact force generated by the gas circuit breaker, (B) is the impact force generated by the shock absorbing operating device, and (C) and (D) are the impact forces generated by the gas circuit breaker. The load corresponding to the impact force, (E) shows the total load applied to the floor surface, FIGS. 3 and 4 are cross-sectional views showing other embodiments of the present invention, and FIG. 5 is a general gas Figure 6, a cross-sectional view showing the structure of the circuit breaker, shows the impact force and load applied to the floor surface in a conventional gas circuit breaker, where (A) shows the impact force generated by the gas circuit breaker, (B) and ( C) shows the load corresponding to the impact force, (D) shows the total load applied to the floor surface, and FIG. 7 is a schematic diagram showing an example of installing a conventional gas circuit breaker. 1... Operating mechanism box, 2... Operating cylinder, 3...
Operation rod, 4... Insulating tube, 5.6... Conductor, 7.
... Fixed side electrode, 8... Movable side electrode, 9... Insulating tube, 15... Current-carrying contact, 20... Gas circuit breaker, 21
...Gas insulated equipment, 22...First base, 23.
...Elastic body, 24...Second base, 25...Floor surface, 30...Shock absorption operating device, 31...Supporting member, 32...Movable part, 33...Rack lever with 3
4... Pinion, 35... First spring member, 36...
...Second spring member, 37...Stopper, 40...
- Shock absorption operating device, 41... operating cylinder, 42
．． 43... Piston.

Claims (1)

[Claims] The operation mechanism box of the gas insulated switch that constitutes the gas insulated switchgear operates in synchronization with the operation command issued to the gas insulated switch, and the impact force generated by the operation is applied to the gas insulated switch. A gas-insulated switch characterized by being equipped with a shock-absorbing operating device that acts in the opposite direction to the shock force generated by the switch.