JP2513535Y2 - Control device for disconnector - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an operating device for a disconnecting switch that can manually operate the disconnecting switch.

B. Outline of the Invention The present invention relates to a disconnector operating device in which a disconnector housed inside a tank is operated by moving a movable rod from outside the tank. In addition, a slider that is pulled out of the tank via the disconnecting jig is provided so as to be interlocked with the movable rod, thereby simplifying the structure and reducing the manufacturing cost and downsizing.

C. Conventional Technique First, the connection state of the gas insulated switchgear will be described with reference to FIG. Although the figure shows the connection per single wire, each gas insulated switchgear is provided for three phases. Also,
There are two main buses, main buses 1a and 1b, one of which is a main line and the other is an auxiliary line used as an emergency in case of a power failure or the like.
In the figure, 2 is a circuit breaker, 3 is a current transformer, 4 is a cable head for connecting to a load, 5 is a lightning arrester, 6 is an instrument transformer, 7a to 7c are grounding devices, and 8a to 8d are disconnecting switches. is there.

Next, a gas-insulated switchgear with such wiring will be described with reference to FIG.

As shown in the figure, a cutoff unit 12a, a main busbar unit 12b, and a line-side unit 12c are formed on the base 11. The blocking unit 12a includes a frame 13 on the base 11 and a blocking tank 14 on the frame 13, and the line-side unit 12c includes the base 1
It is composed of a cable support frame 15 and a cable tank 16 on the above 1. The main bus unit 12b is composed of conduits 17a and 17b extending in a direction perpendicular to the plane of the paper, and conduits 18a and 18b connected to the conduits 17a and 17b at a right angle and connected to the shutoff tank 14.

Main buses 1a and 1b for three phases are respectively arranged in the pipelines 17a and 17b in a direction perpendicular to the plane of the drawing, and the main buses 1a and 1b are guided into the cable tank 16 through the blocking tank 14. Disconnector 8a, 8
b is provided in the pipelines 17a and 17b, and the circuit breaker 2, the current transformer 3,
The grounding devices 7a, 7b are provided in the cutoff tank 14, and the cable head 4, the lightning arrester 5, the disconnectors 8c, 8d, and the grounding device 7c for connecting the load bus are provided in the cable tank 16. Reference numeral 20 denotes a main circuit conductor, 23 denotes a main circuit conductor connected to the main buses 1a and 1b, 6 denotes an instrument transformer connected to the lightning arrester 5 via the connection conductor 19, and 22 denotes a switch for manually operating the disconnector 8d. Operating device. The tanks 14 and 16 are filled with an insulating gas.

Next, the configuration of the operating device 22 will be described with reference to FIG.

A movable rod 28 is provided so as to be freely inserted through a movable contact 27 provided on the lightning arrester 5 and a fixed contact 26 provided on the main circuit conductor 20, and the movable rod 28 is operated via an insulating rod 29. The device 22 is interlocked. As shown in the figure, a cylinder unit 30 is attached to the side surface of the tank 16, and a piston unit 32 is provided in the cylinder unit 30 via an O-ring 31 so as to be movable. The left side of the piston portion 32 is connected to the insulating rod 29, while the screw rod 33 is attached to the right side of the piston portion 32 by a rotary bearing 34.
Are rotatably connected via a. Screw rod 33 is the piston part
Since it is formed in 30, it is screwed into the screw portion 35, and a square columnar engaging portion 36 is formed at the right end thereof. Then, a cover 37 that covers the engaging portion 36 is attached to the cable tank 16 together with the piston portion 30 via a bolt 38. In addition, 39 is an O-ring and 40 is a shield.

When the whole of the screw rod 33 is screwed into the female screw portion 35, the fixed side contact 26 and the movable side contact 27 are connected by the movable rod 28, and the disconnector 8d is in the connected state.
When the lid 37 is removed, the handle 41 is fitted into the engagement portion 36 and turned, the piston portion 32 moves to the right end in the cylinder portion 30,
The disconnector 8d is in the disconnection state.

D. Issues to be solved by the invention However, there are the following issues.

(A) Since the threaded rod must be rotatably supported with respect to the piston part, a rotary bearing is required, which complicates the structure inside the piston part and increases the outer diameter of the cylinder part, resulting in a large operating unit. The whole becomes larger.

(B) In addition, since the screw rod is screwed into the cylinder and mounted, the amount of protrusion of the operating device from the cable tank is large.

Then, this invention aims at providing the operating device of the disconnector which solved such a subject.

E. Means for Solving the Problem The configuration of the present invention for achieving such an object is to move a disconnecting switch housed inside a tank filled with insulating gas with a movable rod from outside the tank. In a disconnector operating device that is operated by a slider, a slider is movably provided in a through hole formed in a tank through a sealing material, and a hollow portion is formed from the outer end of the slider toward the inside and A shape in which a female thread is formed on the end side, the inner end of the slider is interlockingly connected to the movable rod through an insulating member, and a lid that closes the through hole is detachably attached to the tank and the slider can be housed inside. And a support frame that is detachable from the tank, a screw rod that penetrates through the center of the support frame, is rotatably supported, and has a threaded portion inside the support frame, and a screw rod that projects from the side opposite to the mounting portion of the support frame. Mounted on the end of Characterized in that a disconnector jig consisting of a handle to be.

F. Action If you want to connect or disconnect the disconnector, attach the disconnecting jig to the tank, rotate the handle, and rotate the screw rod forward or backward with respect to the female thread of the slider to move the slider. By.

In order to maintain the disconnector in the connected state, a lid is attached to the through hole in order to maintain the airtightness in the tank.

G. Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In this embodiment, since a part of a conventional disconnecting switch operating device is improved, the same parts as those in the related art are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.

(A) First Embodiment The configuration of a first embodiment of the disconnector operating device according to the present invention will be described with reference to FIGS. 1 (a) and 1 (b).

As shown in the figure, the through hole 42 formed in the cable tank 16
The case 43 consisting of the cylindrical part and the flange part is the O-ring 44.
Are fitted via And a slider with a substantially bottomed cylindrical shape
45 is inserted through the O-ring 46. A hollow portion 47 is formed from the end surface of the slider 45 facing the outside of the cable tank, and a female screw portion 48 is formed in the opening. Case 43
A concave portion 50 is formed in the vicinity of the inner peripheral surface of the flange side, and the flange portion 49 formed on the opening side of the slider 45 fits into the concave portion 50. On the right side surface of the case 43 in the drawing, O
The lid 51 is put on via the ring 44, and the lid 5 is put on by the bolt 52.
1, the case 43 is connected to the cable tank 16. Then, the opposite opening side of the slider 45 is interlockingly connected to the movable rod 28 via the insulating member 29.

In addition, the disconnecting jig 53 shown in FIG. 1B is prepared, which is not normally mounted. Hollow part with larger inner diameter than outer diameter of flange 49 of slider 45
A substantially bottomed tubular support frame 55 having 54 is provided. Support frame
55 has a flange 56 on the opening side and is detachably attached to the tank 16 by a bolt 52. At the center of the support frame 55 on the side opposite to the opening, a screw rod is inserted through a bearing 58.
57 is rotatably supported, and the threaded part of the threaded rod 57 is hollow 54
It is located inside and slightly protruding from the inside. This screw rod
A handle 59 is attached to an end portion of the 57 that protrudes to the side opposite to the opening portion.

Such a disconnector operating device is shown in FIG. 1 (a) when connected.
When the slider 45 is moved all the way to the left as shown in
49 enters the recess 50, and the through hole 42 can be sealed with the lid 51.

When disconnecting, after removing the lid 51, the support frame 55 is attached to the case 43 via the bolt 52, and the handle 59 is
Rotate in the direction of. Then, the slider 45 screwed with the screw rod 57 moves to the right in the figure, and accordingly, the movable rod 28 separates from the fixed side contact 26, and the disconnection of the disconnector 8d is completed. Also at this time, the cable tank 1 is connected by the O-rings 44 and 46.
6 is airtight. In order to return to the connection state of FIG. 1 (a) again, the handle 50 may be returned in the opposite direction.

(B) Second Embodiment Next, a second embodiment of the operation device of the disconnector will be described with reference to FIGS. 2 (a) and 2 (b).

The second embodiment has a configuration in which the axis of the movable rod 28 and the axis of the slider 45 do not coincide with each other.
The other parts are the same as in the first embodiment except for the configuration of the connecting portion with.

As shown in the figure, a lever 61 is rotatably provided around a support shaft 60, the tip of the lever 61 is connected to a slider 45 via a link 62, and is integrally provided so as to extend the tip of the lever 61. The tip of the insulated rod 63 is interlocked with the movable rod 28 via the pin 64.

The operation device of such a disconnector operates in the same manner as in the first embodiment except that the lever 61 rotates about the rotating shaft 60, and therefore the description of the operation will be omitted.

H, Effect of the Invention As can be seen from the above description, the disconnector operating device according to the present invention has the following effects.

(A) Since the screw rod screwed to the slider is not always attached to the tank, the entire apparatus can be made smaller than the conventional one. In addition, the manufacturing cost is reduced due to the decrease in the number of parts.

(B) The sealing member is in contact with the outer peripheral surface of the slider, and the sealing surface is easier to machine and more reliable than the conventional sealing member in contact with the inner peripheral surface.

[Brief description of drawings]

1 (a) and 1 (b) relate to a first embodiment of an operating device for a disconnecting switch according to the present invention, and FIG. 1 (a) is a configuration diagram at the time of connection,
FIG. 1 (b) is a configuration diagram at the time of disconnection, and FIGS. 2 (a) and 2 (b).
FIG. 2 (a) relates to a second embodiment of the operating device of a disconnector.
Is a configuration diagram at the time of connection, FIG. 2 (b) is a configuration diagram at the time of disconnection, FIG. 3 is a wiring diagram of the gas insulated switchgear, FIG. 4 is a configuration diagram of the gas insulated switchgear, and FIG. Regarding the operation device of the disconnector, FIG. 5 (a) is a block diagram when connected, and FIG. 5 (b) is a block diagram when disconnected. 16 …… Cable tank, 22 …… Operating device, 26 …… Fixed side contact, 27 …… Movable side contact, 28 …… Movable rod,
29,63 …… Insulation member, 42 …… Through hole, 45 …… Slider, 4
6 …… Seal material, 47,54 …… Hollow part, 48 …… Female thread part, 51
...... Lid, 53 ...... Disconnection jig, 55 ...... Support frame, 57 ...... Screw rod, 59 ...... Handle, 60 ...... Support shaft, 61 ...... Lever.

Claims (1)

(57) [Scope of utility model registration request] 1. An operating device for a disconnector, wherein the disconnector is housed in a tank filled with insulating gas and is operated by moving a movable rod from the outside of the tank. A slider is movably provided in the through hole via a seal material to form a hollow portion from the outer end of the slider toward the inside and a female screw on the outer end side, while insulating the inner end of the slider. A lid that is connected to the movable rod through a member and detachably attaches a lid that closes the through hole to the tank, has a shape that can accommodate a slider inside, and a detachable support frame in the tank, and penetrates the center of the support frame. A disconnecting jig consisting of a screw rod that is rotatably supported and has a threaded portion inside the support frame, and a handle that is attached to the end of the screw rod protruding from the side opposite to the mounting portion of the support frame. Features Disconnector operating apparatus.