CN214153745U - Miniaturized double-bus switch equipment - Google Patents

Abstract

The utility model discloses a miniaturized double-bus switch device, which comprises a bus chamber A, a bus chamber B and an isolating switch chamber, and is characterized in that the bus chamber A and the bus chamber B are positioned in the middle position of the top of the switch device and are arranged side by side from front to back; a metal partition plate is arranged between the bus chambers A, B, an isolating switch chamber is arranged below the bus chamber A, B, a direct-acting isolating switch for double buses is arranged in the isolating switch chamber, and the bus chambers A, B are movably connected with the isolating switch. The utility model has the advantages that: a direct-acting isolating switch for double buses replaces the original two groups of isolating disconnecting switches, thereby reducing the cost; the direct-acting isolating switch for the double buses only needs one set of operating mechanism, is simple to operate, and meanwhile, the operating mechanism is provided with the motor, so that when the operating handle is inserted into the operating hole, the electric operation is locked.

Description

Miniaturized double-bus switch equipment

Technical Field

The utility model relates to a miniaturized double bus switchgear belongs to the medium-pressure air insulation and exchanges metal enclosed switchgear field.

Background

At present, medium-voltage air-insulated alternating-current metal enclosed switchgear is mainly used for a single-bus operating system, so that most of the medium-voltage air-insulated alternating-current metal enclosed switchgear is single-bus switchgear. In some special cases, however, single bus switchgear still has its limitations. Such as the following: the inlet cabinet is provided with a non-synchronous breaker of a main switch; in emergency, the load needs to be cut off selectively according to the importance degree of the load; special loads are isolated from the common power grid; power failure is not needed, and more flexible inspection and maintenance are carried out; and 3, the switch cabinet is expanded and assembled without power failure. Therefore, in situations where a single bus switchgear cannot meet the above, a dual bus switchgear is required. Fig. 1 shows a more common dual bus system diagram with a bus coupler switch, in which a plurality of loads (such as loads in a frame) can be coupled to different buses a or B by switching on and off different disconnectors, so that when a certain bus is serviced, the load can still be supplied with power through another bus.

The common medium-voltage air-insulated withdrawable double-bus switchgear (1500 mmx2500mmx3000mm wide x high) on the market has two sets of isolating switches, and each set of isolating switch needs one operating mechanism separately. Because two sets of isolating switches are arranged in the cabinet, the height and the depth of the isolating switch are larger than those of the conventional single-bus switch equipment, and the width of the cabinet needs to be increased in order to more conveniently operate the isolating switch in front of the cabinet, so that an operating mechanism can be conveniently installed.

The size of the existing double-bus switch equipment is large, the two sets of operating mechanisms are complex to operate, meanwhile, interlocking needs to be arranged between the two sets of isolating switch operating mechanisms to prevent simultaneous switching-on, the product cost is increased, the use by a user is inconvenient, and if the two sets of isolating switch operating mechanisms fail to interlock, accidents are caused.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: how to design a miniaturized double-bus switchgear, make it only one set of isolator, can make it simultaneously again to operate simple operation security height.

In order to solve the technical problem, the technical scheme of the utility model is to provide a miniaturized double bus bar switchgear, including generating line room A, generating line room B and isolator room, characterized in that, generating line room A and generating line room B be located switchgear top intermediate position, for front and back side by side arrangement; a metal partition plate is arranged between the bus chambers A, B, an isolating switch chamber is arranged below the bus chamber A, B, a direct-acting isolating switch for double buses is arranged in the isolating switch chamber, the bus chambers A, B are movably connected with the isolating switch, and the isolating switch body comprises a three-phase gear chain assembly, an insulating screw rod, a bus end A, a moving contact, an isolating middle position end and a bus end B.

Preferably, the three-phase gear chain assembly is connected with an insulating screw rod, a moving contact is arranged on the insulating screw rod, and the moving contact is movably connected with an end head at the middle position of the isolation, an end head of the A bus and an end head of the B bus.

Preferably, the side parts of the bus chamber A and the isolating switch chamber are provided with circuit breaker chambers, the circuit breaker chambers are internally provided with circuit breakers and operating mechanisms which are connected with the isolating switches, and the front parts of the circuit breaker chambers are provided with manual operation interfaces and observation windows.

Preferably, the operating mechanism is connected with the insulating screw rod, and the operating mechanism is connected with a manual operation interface arranged at the front part of the breaker chamber.

Preferably, the upper part of the breaker chamber is provided with an instrument chamber, and the instrument chamber is internally provided with a switch which can electrically control the isolating switch.

Preferably, a cable chamber is arranged at the lower part of the isolating switch chamber, and a current transformer and a grounding switch are arranged in the cable chamber.

The utility model has the advantages that: a direct-acting isolating switch for double buses replaces the original two groups of isolating disconnecting switches, thereby reducing the cost; the direct-acting isolating switch for the double buses only needs one set of operating mechanism, is simple to operate, and meanwhile, the operating mechanism is provided with the motor, so that when the operating handle is inserted into the operating hole, the electric operation is locked. The functions of the two sets of isolation switches can be realized only by one set of isolation switch, so that the interlocking (mechanical or electrical) between the two sets of isolation switches is not required to be additionally added, the safety and the reliability are higher, and the cost is saved; because direct action type isolator compares electric field distribution more evenly with knife switch formula isolator, so compact structure, volume are littleer to reduced whole switchgear volume, the manual operation hole sets up in the front of the cabinet, and personnel can be convenient operate in the front of the cabinet, and operating mechanism passes through gear and chain synchronous drive, and the operating force is little, and the axiality is high, and isolator's electrical contact is touched the finger by inside spring (the quantity that the required spring touched the finger depends on isolator's parameter).

Drawings

FIG. 1 is a diagram of a conventional dual bus system with a bus tie switch;

fig. 2 is a schematic structural view of a miniaturized double-bus switchgear of the present invention;

fig. 3 is a schematic view of a connection structure of the isolating switch of the present invention;

fig. 4 is a schematic structural view of the middle operating mechanism of the present invention;

fig. 5 is a position relationship diagram of the manual operation interface and the observation window of the present invention.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in fig. 2 to 5, a miniaturized double-bus switchgear comprises a bus-bar room a1, a bus-bar room B2 and a disconnector room 3, wherein the bus-bar room a1 and the bus-bar room B2 are located at the middle position of the top of the switchgear and are arranged side by side in the front-back direction; a metal partition plate is arranged between the bus chambers A, B, an isolating switch chamber 3 is arranged below the bus chamber A, B, a double-bus direct-acting isolating switch is arranged in the isolating switch chamber 3, the bus chambers A, B are movably connected with the isolating switch, the isolating switch body comprises a three-phase gear chain component 7, an insulating screw 8, an A bus end 9, a movable contact 10, an isolating middle position end 11 and a B bus end 12, the three-phase gear chain component 7 is connected with the insulating screw 8, the movable contact 10 is arranged on the insulating screw 8, and the movable contact 10 is movably connected with the isolating middle position end 11, the A bus end 9 and the B bus end 12; the side parts of the bus chamber A1 and the isolating switch chamber 3 are provided with a circuit breaker chamber 4, a circuit breaker and an operating mechanism 15 connected with the isolating switch are arranged in the circuit breaker chamber 4, and a manual operation interface 13 and an observation window 14 are arranged on a front shell of the circuit breaker chamber 4. The operating mechanism 15 is connected with the insulating screw 8, the operating mechanism 15 is connected with a manual operation interface 13 arranged at the front part of the circuit breaker chamber 4, the upper part of the circuit breaker chamber 4 is provided with an instrument chamber 5, and a switch-on/off switch capable of electrically controlling the isolating switch is arranged in the instrument chamber 5. And a cable chamber 6 is arranged at the lower part of the isolating switch chamber 3, and a current transformer and a grounding switch are arranged in the cable chamber 6.

The specific working process is as follows:

a miniaturized double-bus switch device comprises a bus chamber A1, a bus chamber B2, a disconnecting switch chamber 3, a breaker chamber 4, an instrument chamber 5 and a cable chamber 6, wherein the bus chamber A1 and the bus chamber B2 are located in the middle of the top of the switch device and are arranged in a front-back side-by-side mode; the busbar chambers A, B are separated by metal partitions. The isolating switch chamber 3 is arranged below the bus chamber A, B, a direct-acting isolating switch for double buses is arranged in the isolating switch chamber, and the isolating switch body comprises a three-phase gear chain component 7, an insulating screw 8, a bus end 9A, a moving contact 10, an isolating middle position end 11 and a bus end 12B. When three-phase gear chain component 7 rotated, drive insulating screw 8 rotatory, insulating screw 8 drive moving contact 10 motion, makes moving contact 10 at A generating line end 9 to B generating line end 11 between reciprocal linear motion, and it has three position state:

a) when the moving contact is at the leftmost end, the moving contact is communicated with the A bus;

b) when the movable contact moves to the middle position, A, B bus bars are isolated;

c) when the moving contact moves to the rightmost end, the bus B is communicated.

Thereby completing the make, break and switch between bus A, B on the load side of the switchgear.

The breaker chamber 4 is located in the front of the bus chamber and the isolation switch chamber 3, in which besides the breaker handle is arranged, an operating mechanism 15 (manual, electric) is arranged in the middle of the upper part of the breaker chamber, and a motor 16 is arranged in the mechanism, so that the electric operation can be realized. A manual operation interface 13 is arranged at the front part of the breaker chamber 4, and an observation window 14 is arranged on the door of the breaker chamber, so that the manual operation of the isolating switch can be realized, and the current state can be correctly displayed. When the operating rocking handle is inserted into the manual operation interface 13, the insulating screw rod is driven to rotate through clockwise or anticlockwise circumferential rotation of the rocking handle, so that the disconnecting switch is driven to switch between a bus A closing position state, a bus B closing position state and an isolation position state. And a disconnecting switch on-off state indication provided with a bus A, B on the right side. And an interlocking observation window is arranged below the state indication of the isolating switch. The interlocking is the interlocking of the disconnecting switch and the circuit breaker handcart, and when the circuit breaker handcart is in a working position, the operation of the disconnecting switch is forbidden through mechanical interlocking; only when the circuit breaker handcart is located the test position, just allow isolator's operation, the interlocking between isolator and the circuit breaker also can be realized through the shutting electro-magnet.

Claims (6)

1. A miniaturized double-bus switch device comprises a bus chamber A (1), a bus chamber B (2) and an isolating switch chamber (3), and is characterized in that the bus chamber A (1) and the bus chamber B (2) are positioned in the middle of the top of the switch device and are arranged side by side in the front and back; be equipped with metal partition between bus room A, B, be equipped with isolator room (3) in bus room A, B's below, be equipped with the isolator of a double bus with direct action formula in isolator room (3), bus room A, B all with isolator swing joint, this isolator body contains three-phase gear chain subassembly (7), insulating screw (8), A bus end (9), moving contact (10), keeps apart intermediate position end (11) and B bus end (12).

2. The miniaturized double-bus switch device as claimed in claim 1, wherein the three-phase gear chain assembly (7) is connected with an insulating screw (8), a moving contact (10) is arranged on the insulating screw (8), the moving contact (10) is movably connected with an end (11) at an isolation intermediate position, an end (9) of an a bus and an end (12) of a B bus, when the three-phase gear chain assembly (7) rotates, the insulating screw (8) is driven to rotate, the insulating screw (8) drives the moving contact (10) to move, the moving contact (10) makes a reciprocating linear motion between the end (9) of the a bus and the end (12) of the B bus, and the three-phase gear chain assembly has three position states:

a) when the moving contact (10) is at the leftmost end, the bus A is communicated;

b) when the movable contact (10) moves to the middle position, A, B bus bars are isolated;

c) when the moving contact (10) moves to the rightmost end, the bus B is communicated.

3. A miniaturized double-bus switchgear according to claim 1, characterized in that the front of the bus chamber a (1) and the disconnector chamber (3) is provided with a breaker chamber (4), the breaker chamber (4) is provided with a breaker and an operating mechanism (15) connected with the disconnector, and a front shell of the breaker chamber (4) is provided with a manual operation interface (13) and an observation window (14).

4. A miniaturised double busbar switchgear device according to claim 3, characterized in that said operating means (15) are connected to the insulating screw (8), the operating means (15) being connected to a manual operating interface (13) arranged in the front of the breaker chamber (4).

5. A miniaturized double-bus switch device according to claim 3, characterized in that the upper part of said breaker chamber (4) is provided with an instrument chamber (5), and the instrument chamber (5) is provided with a switch-on/off switch capable of electrically controlling the disconnector.

6. A miniaturized double-bus switchgear according to claim 1, characterized in that a cable chamber (6) is provided in the lower part of said disconnector chamber (3), and a current transformer and a grounding switch are provided in said cable chamber (6).

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