CN204632628U - Interlock device for circuit breaker main shaft and isolation operation shaft in high voltage switchgear - Google Patents

Abstract

For the interlock of breaker main shaft in high-tension switch cabinet and isolated operation axle, solve circuit breaker and isolate the technical problem that easy misoperation causes potential safety hazard, the technical scheme adopted is, interlock is arranged between breaker main shaft and isolated operation axle, structure comprises mechanism's clamping plate, be arranged on the separation retaining sheet above isolated operation axle, breaker switching-on operation button and the combined floodgate catch be arranged on above breaker switching-on operation button, combined floodgate catch rotational positioning is on mechanism's clamping plate, and by the reset tension spring being separately positioned on two ends and the cam that is connected with isolated operation axle, there is rotational freedom, separation retaining sheet has translation freedoms by the horizontal drive mechanism be connected with breaker operator main shaft.This interlocking design substantially increases the fail safe of operation.

Description

Interlock device for circuit breaker main shaft and isolation operation shaft in high voltage switchgear

technical field

The utility model relates to a safety interlock device in a ring network cabinet, which belongs to the field of power distribution equipment, in particular to an interlock device used for a circuit breaker main shaft and an isolation operation shaft in a high-voltage switch cabinet.

Background technique

The ring network cabinet is a very important electrical equipment in the power system. The interlock function of the ring network cabinet is an important measure to ensure the safety of electrical equipment and personal safety. To ensure the safe operation of the ring network cabinet, in addition to operating strictly according to the regulations, it is also necessary to improve the reliability of the mechanical interlock of the ring network cabinet.

In the high-voltage switchgear, the operation sequence of the circuit breaker and the isolation should be: when the switchgear is in the running state, first open the circuit breaker, and then operate the isolation to the open state. On the contrary, the sequence is reversed, first operate the isolation to the closed state, and then close the circuit breaker. The sequence of turning on and off the circuit cannot be changed. Therefore, it is necessary to install an interlock device between the circuit breaker and the isolation, so that the operator can only complete the specified actions in accordance with the normal operation sequence. The reason for this is simple, because the isolation does not have the ability to break the current, if the isolation switch is closed with a load, the isolation switch will be burned.

Contents of the invention

In order to solve the technical problem of potential safety hazard caused by misoperation of circuit breaker and isolation, the utility model designs an interlocking device for the main shaft of the circuit breaker and the isolation operation shaft in the high-voltage switch cabinet. The structure is simple and easy to operate, so that the circuit breaker and The operation sequence of the isolation can only be operated in accordance with the regulations, avoiding human misoperation, and solving the technical problem of potential safety hazards caused by easy misoperation of the circuit breaker and isolation.

The technical scheme adopted by the utility model for realizing the purpose of the invention is that the interlock device used for the main shaft of the circuit breaker and the isolation operation shaft in the high-voltage switchgear is arranged between the main shaft of the circuit breaker and the isolation operation shaft. The key is: the interlock The structure of the device includes a mechanism splint, an isolation block set above the isolation operation shaft, a circuit breaker closing operation button, and a closing block set above the circuit breaker closing operation button. The closing block is rotated and positioned on the mechanism splint , and the degree of freedom of rotation is provided by the return tension springs respectively arranged at both ends and the cam connected with the isolation operation shaft, and the degree of freedom of translation is provided by the isolation block by the horizontal transmission mechanism connected with the main shaft of the circuit breaker operation.

The beneficial effects of the utility model are: 1. With the help of the rotation of the main shaft when the circuit breaker closes and opens, the ejector rod device is driven to move, and the isolation block acts on the isolation operation shaft. When the circuit breaker is closed, the isolation block blocks the isolation The operating hole on the operating shaft, the isolating switch cannot be operated at this time; when the circuit breaker is opened, the isolating block does not interfere with the isolating operating shaft at this time, and the isolating switch can be operated at this time; 2. With the operation of the isolating switch, through the operation Isolation operation shaft, the cam that rotates simultaneously with the isolation operation shaft moves the lower arm of the closing stopper, when the isolating switch is in the opening position, the closing stopper interferes with the closing button, and the circuit breaker cannot be closed at this time; When the isolating switch is in the closing position, the closing flap flashes the closing button at this time, and the circuit breaker can be closed. This interlock design greatly improves the safety of operation.

Description of drawings

Fig. 1 is a schematic diagram of circuit breaker opening and isolation opening of the utility model;

Fig. 2 is a schematic diagram of opening and closing of the circuit breaker in the utility model;

Fig. 3 is a schematic diagram of circuit breaker closing and isolation closing of the utility model;

In the accompanying drawings, 1A is the main shaft of the circuit breaker, 1 is the sector cam, 2 is the ejector rod, 2-1 is the roller, 2-2 is the reset compression spring, 2-3 is the positioning support plate, 3 is the reset extension spring, 4 is the Isolation block, 5 is the closing block, 6 is the circuit breaker closing operation button, 7 is the cam, 8 is the isolation operation shaft, and 9 is the mechanism splint.

Detailed ways

An interlocking device for the main shaft of the circuit breaker and the isolation operation shaft in the high-voltage switchgear, which is arranged between the main shaft 1A of the circuit breaker and the isolation operation shaft 8. The key is: the structure of the interlock device includes a mechanism splint 9, The isolation flap 4 arranged above the isolation operation shaft 8, the circuit breaker closing operation button 6 and the closing flap 5 arranged above the circuit breaker closing operation button 6, the closing flap 5 is rotated and positioned on the mechanism splint 9 , and the return tension spring 3 arranged at both ends and the cam 7 connected to the isolation operation shaft 8 have a degree of freedom of rotation, and the isolation block 4 has a degree of freedom of translation by means of a horizontal transmission mechanism connected to the main shaft 1A of the circuit breaker operation.

The structure of the horizontal transmission mechanism includes: a fan-shaped cam 1 arranged on the main shaft 1A of the circuit breaker, a push rod 2 horizontally sliding and limited on the mechanism splint 9 and a reset compression spring 2-2, and the isolation block 4 is arranged on the top. At the end of the rod 2, the push rod 2 has a degree of freedom of horizontal sliding by means of the cooperation of the top end and the sector cam 1, and the isolation block 4 has a degree of freedom of translation by means of the horizontal sliding of the push rod 2.

The limit structure of the push rod 2 includes a mounting plate fixed on the mechanism splint, a group of positioning pallets 2-3 with sliding holes are arranged horizontally on the mounting plate, and the return compression spring 2-2 is arranged on the adjacent Between the positioning pallets, the end of the ejector rod 2 passes through the sliding hole on the positioning pallet 2-3 and the horizontal sliding limit of the return compression spring 2-2.

The top end of the push rod 2 is provided with a roller 2-1 that cooperates with the sector cam 1 .

The shape of the closing flap 5 is a crank arm type, and the corner is rotated and positioned on the mechanism splint 9 by means of a rotating shaft. The upper crank arm of the closing flap 5 is connected to the reset spring 3 and is arranged on the circuit breaker closing operation button 6 Above, the upper crank arm has a rotational degree of freedom by means of the cooperation of the lower crank arm and the cam 7 .

The lower end of the reset extension spring 3 is connected with the upper crank arm of the closing block 5, and the upper end is fixed on the mechanism splint 9 or the positioning supporting plate 2-3.

When the utility model is actually implemented, the fan-shaped cam 1 that rotates with the main shaft of the circuit breaker rotates with the opening and closing of the circuit breaker, and then drives the ejector rod 2 to slide horizontally, so that the isolation block 4 installed at the end of the ejector rod 2 follows the circuit breaker. The main shaft of the switch moves on and off. When the circuit breaker is opened and the isolation is closed, the isolation barrier 4 does not interfere with the isolation operation shaft 8, and the isolation can be operated at this time; when the circuit breaker is closed and the isolation is closed, the isolation barrier 4 interferes with the isolation operation shaft 8 , the isolation cannot be operated at this time. When the circuit breaker is opened and isolated and closed, the cam 7 that rotates with the isolation operation 8 at this time moves the lower arm of the closing flap 5 so that the upper arm of the closing flap 5 does not interfere with the closing operation of the circuit breaker Button 6, the circuit breaker can be closed at this time; when the circuit breaker is opened and isolated, the cam 7 rotating with the isolation operation shaft 8 cannot move the closing stopper 5, and the closing stopper 5 is in the reset tension spring 3 rotates to a specific position, at this time the closing flap 5 interferes with the closing operation button 6 of the circuit breaker, and the circuit breaker cannot perform the closing operation at this time.

Claims (6)

1. for the interlock of breaker main shaft in high-tension switch cabinet and isolated operation axle, be arranged between breaker main shaft (1A) and isolated operation axle (8), it is characterized in that: the structure of described interlock comprises mechanism's clamping plate (9), be arranged on the separation retaining sheet (4) of isolated operation axle (8) top, breaker switching-on operation button (6) and the combined floodgate catch (5) be arranged on above breaker switching-on operation button (6), combined floodgate catch (5) rotational positioning is on mechanism's clamping plate (9), and by the reset tension spring (3) being separately positioned on two ends and the cam (7) that is connected with isolated operation axle (8), there is rotational freedom, separation retaining sheet (4) has translation freedoms by the horizontal drive mechanism be connected with breaker operator main shaft (1A).

2. the interlock for breaker main shaft in high-tension switch cabinet and isolated operation axle according to claim 1, it is characterized in that: the structure of described horizontal drive mechanism comprises: be arranged on the sector (1) on breaker main shaft (1A), the spacing push rod (2) on mechanism's clamping plate (9) of horizontal slip and reseting pressuring spring (2-2), separation retaining sheet (4) is arranged on the end of push rod (2), push rod (2) has the horizontal slip degree of freedom by top with coordinating of sector (1), separation retaining sheet (4) has translation freedoms by the horizontal slip of push rod (2).

3. the interlock for breaker main shaft in high-tension switch cabinet and isolated operation axle according to claim 2, it is characterized in that: the position limiting structure of described push rod (2) comprises the mounting panel be fixed on mechanism's clamping plate, mounting panel is horizontally provided with one group of location supporting plate (2-3) with slide opening, reseting pressuring spring (2-2) is arranged between adjacent positioned supporting plate, the end of push rod (2) through the slide opening on location supporting plate (2-3) and reseting pressuring spring (2-2) horizontal slip spacing.

4. the interlock for breaker main shaft in high-tension switch cabinet and isolated operation axle according to claim 2, is characterized in that: the top of described push rod (2) is provided with the roller (2-1) coordinated with sector (1).

5. the interlock for breaker main shaft in high-tension switch cabinet and isolated operation axle according to claim 1, it is characterized in that: the shape of described combined floodgate catch (5) is connecting lever type, corner is positioned on mechanism's clamping plate (9) by axis of rotation, the upper connecting lever of combined floodgate catch (5) connects reset tension spring (3) and is arranged on breaker switching-on operation button (6) top, and upper connecting lever has rotational freedom by lower connecting lever with coordinating of cam (7).

6. the interlock for breaker main shaft in high-tension switch cabinet and isolated operation axle according to claim 3 or 5, it is characterized in that: the lower end of described reset tension spring (3) is connected with the upper connecting lever of combined floodgate catch (5), upper end is fixed on mechanism's clamping plate (9) or location supporting plate (2-3).