JPH06176667A - Tank type gas circuit-breaker - Google Patents

Abstract

PURPOSE:To provide a tank type gas circuit-breaker which facilitates the work of extracting an interrupting portion if an accident occurs and the interrupting portion need be extracted to repair a nonconforming portion for restoration. CONSTITUTION:A flange 2 is provided at the end portion of a tank 1 in which an interrupting portion is enclosed, and a mounting member 8 is fastened to the flange 2 and a moving electrode 6 is mounted to the tank 1 side surface of the mounting member 8 via a support insulating material 7. An operating device box 17 for enclosing an operating device 9 is mounted on the surface of the flange 2 to which the mounting member 8 is fastened, and an opening 18 larger in outside diameter than the mounting member 8 is provided on that surface of the operating device box 17 which is opposite to said mounting surface. Therefore, the moving electrode can be extracted from the tank without dismantling the operating device box from the tank, and the work of extracting the interrupting portion and restoring work can be carried out quickly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank type gas circuit breaker having an improved operating device box and circuit breaker tank.

[0002]

2. Description of the Related Art FIG. 5 shows, for example, Japanese Patent Publication No. 63-49843.
FIG. 6 is a cross-sectional view of a conventional tank-type gas circuit breaker shown in Japanese Patent Publication No. In the figure, 1 is a tank filled with insulating gas, 2
Is a flange provided at its end, and 3 is a fixed electrode, which is fixedly supported by the lid 5 via the fixed-side support insulating material 4. Reference numeral 6 denotes a movable pole, which is fixedly supported by the support member 8 via a movable support insulating material 7. Reference numeral 9 denotes an operating device for driving the movable pole, which includes a link 10, an outer lever 11, a rotating shaft 12, and an inner lever 1.
3, the operating shaft 14, and the insulating operating rod 15 are connected to the movable pole 6. 16 is a sealing tank, which is a support member 8
Is airtightly adhered to the inside and communicates with the inside of the tank 1,
The rotating shaft 12 that penetrates is rotatably supported while maintaining airtightness. An operation device box 17 accommodates and supports the operation device 9 and also accommodates the sealing tank 16, a pressure gauge (not shown), a pressure switch, and the like. 18 is an opening for inspection, 1
9 is a door. Reference numeral 20 denotes a bushing, which has a bushing conductor 21 therein, and a conductor connecting portion 22 which is a fixed pole 3 and a movable pole 6.
Respectively connected to.

Next, maintenance and inspection work will be described. When the fixed pole 3 and the movable pole 6 are disconnected from the current, the arc contactor and the nozzle portion are consumed. Therefore, the circuit breaker that has interrupted the current for a certain number of times releases the inspection cover (not shown) and replaces these parts and the tank. Perform internal cleaning and other work. In addition to such normal inspection work, urgent inspection work is required even when a failure occurs in the blocking portion composed of the fixed pole and the movable pole due to, for example, an excessive surge from the outside. In such cases, depending on the location of the problem,
Usually, it is necessary to pull out the blocking part from the tank and repair the defective part or replace parts. The blocking portion is extracted from the fixed electrode 3 from the fixed electrode side lid 5 side and the movable electrode 6 from the operating device box 17 side by the following procedure.

(1) The link 10 connecting the operating device 9 and the outer lever 11 is disassembled. (2) The control line connected to the operating device box 17 is cut off from the separately arranged control panel. (3) The operating device 9 and the operating device box 17 are separated from the support member 8. (4) The movable electrode 6 and the bushing conductor 21 are connected to the conductor connecting portion 2
Separate at 2. (5) The supporting member 8 is separated from the flange 2, and the movable electrode 6 and the movable side supporting insulating material 7 are extracted from the tank 1. (6) Connect the fixed electrode 3 and the bushing conductor 21 to the conductor connecting portion 2
Separate at 2. (7) The lid 5 is separated from the tank 1, and the fixed electrode 3 and the fixed-side supporting insulating material 4 are pulled out from the tank 1.

[0005]

Since the conventional tank-type gas circuit breaker has the above-described structure, the movable pole 6 is pulled out when a trouble occurs such that the shut-off portion has to be pulled out from the tank. The procedure had the following problems. That is, in order to extract the movable electrode 6 from the tank 1 and perform restoration, many parts disassembling operations are required as in the above steps (1) to (5), and a lot of time is required for dismantling and assembling operations. . Since the control line laid between the control lid and the operating device box 17 of the circuit breaker has to be cut off as in step (2), it is necessary to check whether the control line has been restored to the normal state after restoration. It is necessary to perform a test, and this test requires a lot of time. All of these were obstacles to speeding up the work of restoring the circuit breaker.

The present invention has been made in order to solve the above problems, and when the blocking portion has to be pulled out from the tank due to a malfunction of the blocking portion, the removal work is easy and a quick recovery work is performed. It is an object of the present invention to provide a tank type gas circuit breaker structure that enables it.

[0007]

A tank type gas circuit breaker according to the present invention is provided with a flange having an inner diameter larger than the outer diameters of a movable electrode and a supporting insulating material at the tank end, and the flange is provided from the outside of the tank. The mounting member is fastened, the movable pole is fixed to the inside of the mounting member through the supporting insulating material, and the operating device box is fastened to the flange with a through hole larger than the outer diameter of the mounting member, and the operation is performed. The surface of the device box facing the mounting member has an opening larger than the outer diameter of the mounting member.

The portion where the operating shaft penetrates through the mounting member is structured to be airtight and slidably supported by the mounting member.

Further, in another invention, instead of slidably supporting the operation shaft while keeping airtight, a sealing tank surrounding the connecting member is airtightly attached to the mounting member to seal the tank. It is a thing.

[0010]

In the tank type gas circuit breaker according to the present invention, the movable electrode can be pulled out from the tank without disconnecting the operating device box from the tank when a failure occurs in the blocking portion. Further, since the operating device box is not separated, it is not necessary to cut off the control line connected to the operating device from the control panel.

[0011]

【Example】

Example 1. 1 is a sectional view of a tank type gas circuit breaker showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II thereof. In the figure, 1 is a tank filled with insulating gas, 2 is a flange provided at the end of the tank, and 3 is a fixed pole, which is fixedly supported by a lid 5 via a fixed side supporting insulating material 4. Reference numeral 6 denotes a movable pole, which is fixedly supported by a mounting member 8 via a movable side supporting insulating material 7. Reference numeral 9 is an operating device for driving the movable pole, which is the link 3
0, lever 31, shaft 32, lever 33, link 3
It is connected to the operating shaft 14 via a connecting member composed of 4 and further connected to the movable pole 6 via an insulating operating rod 15. The portion where the operation shaft 14 penetrates the support member 8 is provided with a direct acting shaft seal 35 that slidably supports while maintaining airtightness. Three
Reference numeral 6 is a bearing fixed to the support member 8 and supports the shaft 32. An operation device box 17 accommodates and supports the operation device 9, and also accommodates a connecting member, a pressure gauge (not shown), a pressure switch, and the like. Reference numeral 18 is an opening, and 19 is a door. Two
0 is a bushing, which has a bushing conductor 21 inside,
The conductor connecting portion 22 is connected to the fixed pole 3 and the movable pole 6, respectively.

The inner diameter of the flange 2 provided at the end of the tank 1 is made larger than the outer diameters of the movable pole 6 and the movable pole side supporting insulator 7, and the mounting member 8 and the operating device box 17 are attached from the outside of the flange 2. It is attached. Therefore, the mounting surface of the operating device box 17 has a through hole larger than the outer diameter of the mounting member 8. The opening 18 of the operating device box 17 is provided so as to face the mounting surface of the operating device box 17 on the tank 1 side.
The opening is larger than at least the outer diameter of the mounting member 8.
It should be noted that no components are arranged in the space portion inside the operating device box 17 obtained by extending the outer diameter of the mounting member 8 in the tank axial direction toward the door 19 side.

Next, the operation according to the present invention will be described. In the tank type gas circuit breaker according to this embodiment, the procedure for extracting the movable electrode 6 from the tank 1 is as follows. (1) The lever 31 and the operating device 9 are separated at the link 30 portion. (2) The movable electrode 6 and the bushing conductor 21 are connected to the conductor connecting portion 22.
Separate with. (3) The mounting member 8 is separated from the flange 2, and the supporting member 7 and the movable electrode 6 are pulled out from the opening 18 of the operating device box 17.

As shown in the above procedure, in the tank type gas circuit breaker according to the present embodiment, the work of extracting the movable electrode 6 from the tank 1 can be performed without removing the operating device box 17. Further, since the operation shaft 14 has an airtight structure at the portion penetrating the mounting member 8 and the shaft 32 is supported by the bearing 36, maintenance and inspection of the connecting member can be facilitated and the internal space of the operating device 17 can be utilized more widely.

Example 2. FIG. 3 shows another embodiment of the present invention. Except for the opening 18, the cover 37, and the inspection door 38 of the operating device box 17, the same parts as those in the first embodiment are described, and the description of the same parts is omitted. As shown in the figure, the operating device box 17 in this embodiment is provided with an opening 18 whose upper surface is cut at an angle of about 30 degrees on the connection surface on the surface facing the connection surface with the tank 1, and the cover 37 is provided. It is attached. Similar to the first embodiment, the opening 18 has a size such that the movable pole 6 can be pulled out in the horizontal direction while the movable pole 6 is fixed to the mounting member 8.

According to the present embodiment, when the movable pole 6 is pulled out from the tank 1, the work until the mounting member 8 is separated from the flange 2 is the same as that in the first embodiment, but the cover 37 is removed for the pulling work. You can take advantage of the upper space created by doing things. That is, since an open space is formed in the upper part, a heavy machine such as a crane can be used when the movable pole 6 is extracted, and the work can be further speeded up than in the first embodiment.

In FIG. 3, the opening 1 of the operating device box 17 is shown.
8 shows the case where the upper part of the box is cut diagonally, but the movable pole 6 can be pulled out horizontally together with the mounting member 8, and the ceiling surface and the front surface of the upper part of the lead wire are opened larger than the outer diameter of the mounting member 8. If it has, the shape of the opening may be any shape.

Example 3. FIG. 4 shows another embodiment of the present invention. Since the basic configuration is the same as that of the first embodiment, only different points will be described. In the figure, reference numeral 16 denotes a sealing tank which is airtightly fixed to the mounting member 8. Reference numeral 12 denotes a rotary shaft that penetrates the sealing tank 16 in an airtight manner, and the outer lever 1
1. Supports the inner lever 13 and transmits the driving force of the operating device 9 to the movable pole 6. The relationship between the size of the flange 2, the mounting member 8, the mounting portion of the operating device box 17, and the opening 18 is the same as that of the first embodiment.

According to this embodiment, when the movable pole 6 is pulled out from the tank 1, (1) the outer lever 11 and the link 10 are separated. (2) The movable electrode 6 and the bushing conductor 21 are connected to the conductor connecting portion 22.
Separate with. (3) The mounting member 8 is separated from the flange 2 and is pulled out from the opening 18 of the operating device box 17 together with the sealing tank 16, the movable side supporting insulating material 7, and the movable pole 6. It can be dismantled by the procedure.

[0020]

Since the present invention is constructed as described above, the movable pole can be pulled out from the tank without removing the operating device box attached to the tank. Since the operating device box is not removed, it is not necessary to disassemble the control line connected to the operating device. Therefore, when it is necessary to pull out the blocking portion from the tank in the event of an accident, there is an effect that the dismantling is easy and the pulling out work is facilitated, and the restoration work can be performed quickly.

[Brief description of drawings]

FIG. 1 is a sectional view showing a tank type gas circuit breaker according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view showing a tank type gas circuit breaker according to another embodiment of the present invention.

FIG. 4 is a sectional view showing a tank type gas circuit breaker according to another embodiment of the present invention.

FIG. 5 is a sectional view showing a conventional tank-type gas circuit breaker.

[Explanation of symbols]

 1 Tank 2 Flange 3 Fixed Electrode 4 Fixed Side Support Insulation Material 6 Movable Electrode 7 Movable Side Support Insulation Material 8 Mounting Member 9 Operation Device 14 Operation Shaft 16 Sealing Tank 17 Operation Device Box 18 Opening 30 Link 31 Lever 32 Shaft 33 Lever 34 Link 35 Direct acting shaft seal

Claims (2)

[Claims] 1. A fixed pole and a movable pole which can be brought into contact with and separated from the fixed pole are housed in a tank having a flange at an end thereof, and a mounting member fastened to the flange from the outside of the tank,
The movable pole is fixed via a supporting insulating material, one end of the operation shaft is connected to the movable pole, the other end is penetrated through the mounting member and drawn out, and the other end of the operation shaft is connected via a connecting member. In the tank-type gas circuit breaker, which connects the operating device and includes the operating member box that houses the connecting member and the operating device, the inner diameter of the flange is larger than the outer diameters of the movable electrode and the supporting insulating material, A portion where the other end of the operating shaft penetrates the mounting member is supported by the mounting member in a slidable manner in an airtight manner, and the operating device box has a through hole larger than an outer diameter of the mounting member and the flange. A tank-type gas circuit breaker, characterized in that it has an opening larger than the outer diameter of the mounting member on the surface of the operating device box facing the mounting member. 2. A fixed pole and a movable pole which can be brought into contact with and separated from the fixed pole are housed in a tank having a flange at an end thereof, and a mounting member fastened to the flange from the outside of the tank,
The movable pole is fixed via a supporting insulating material, one end of the operation shaft is connected to the movable pole, the other end is penetrated through the mounting member and drawn out, and the other end of the operation shaft is connected via a connecting member. An inner diameter of the flange in a tank-type gas circuit breaker that connects an operating device and seals the tank with a sealing tank that surrounds the connecting member and that includes an operating device box that houses the sealing tank and the operating device. Is larger than the outer diameters of the movable pole and the supporting insulating material, the operating device box is fastened to the flange with a through hole larger than the outer diameter of the mounting member, and the operating device box is A tank-type gas circuit breaker having an opening larger than an outer diameter of the mounting member on a surface facing the mounting member.