CN101697402A - Interlocking device of breaker handcart advancing mechanism - Google Patents

Abstract

The invention relates to a component structure of a circuit breaker handcart for high-voltage power transmission and distribution, in particular to an interlocking device for a propulsion mechanism of a circuit breaker handcart. It includes a driving screw. Behind the driving screw, there is a sliding plate that can move left and right along the horizontal guide rail. There is an operation hole on the sliding plate. When the operating hole moves to the rear end of the driving screw, the operation The handle can be inserted into the operation hole to operate the drive screw; there is also a horizontal guide groove on the slide plate, and a rotatable lock lever is arranged on the inside of the slide plate facing the guide groove, and an operation key can be used to operate the lock lever to rotate. The rotation of the lock bar can drive the auxiliary switch; a crank is installed on the lock bar, and one end of the pin shaft installed on the edge of the crank is placed in a vertical groove on the slide block, and the slide block is fixedly installed on the slide plate. The invention has simple structure and convenient operation, can carry out forced interlocking on the operation of the propulsion mechanism of the handcart, and has high safety and reliability.

Description

Circuit breaker handcart propulsion mechanism interlocking device

technical field

The invention relates to a component structure of a circuit breaker handcart used for high-voltage power transmission and distribution, in particular to an interlocking device for a propulsion mechanism of a circuit breaker handcart.

Background technique

During use, the circuit breaker handcart needs to be pushed into or out of the working position on the switch cabinet through the propulsion mechanism. Usually, its movement in and out is realized by turning a driving screw through the operating handle. During the operation of the switchgear, when the circuit breaker is in the closed state, it is not allowed to operate the propulsion mechanism of the handcart to withdraw the handcart, and when the propulsion mechanism of the handcart is in the operable state, the circuit breaker is not allowed to perform closing operation , so an interlock mechanism is needed to control this process. Most of the existing interlocking devices are complex in structure and poor in reliability, so it is difficult to meet higher requirements for use.

Contents of the invention

The technical problem to be solved by the present invention is to provide a circuit breaker handcart propulsion mechanism interlocking device with simple structure, convenient operation and reliable interlocking.

The circuit breaker handcart propulsion mechanism interlocking device of the present invention includes a driving screw rod whose rear end can be matched with the operating handle, and a sliding plate installed on the handcart panel is arranged behind the driving screw rod, and the sliding plate can be moved along the horizontal The guide rail moves left and right, and there is an operating hole on the slide plate at the same level as the driving screw. When the operating hole moves to face the rear end of the driving screw, the operating handle can be inserted into the operating hole to operate the driving screw; There is also a horizontal guide groove on the slide plate, and a rotatable lock lever is arranged on the inner side of the slide plate facing the guide groove. An operation key can pass through the guide groove and cooperate with the outer end of the lock lever to operate the lock lever to rotate. The rotation of the rod can drive an auxiliary switch connected in the control circuit of the circuit breaker operating mechanism; a crank is installed on the lock rod, a pin is installed on the edge of the crank, and one end of the pin is placed on a vertical In the groove, the slide block is fixedly installed on the slide plate, so that the swing of the crank and the pin shaft can drive the slide plate to move through the slide block.

There is also a pin hole on the slide plate that is level with the above-mentioned guide groove and whose diameter is smaller than the width of the guide groove. The pin hole and the guide groove communicate with each other through a horizontal narrow groove with a width smaller than the diameter of the pin hole. A spring pin is provided, and a spring is pressed on the inside of the spring pin to make the spring pin pop out, and a button with a diameter smaller than the spring pin is arranged on the outside of the spring pin. When the above-mentioned operation hole is facing the driving screw, the spring pin can be inserted into the pin hole.

The invention has simple structure and convenient operation, can carry out forced interlocking on the operation of the propulsion mechanism of the handcart, and has high safety and reliability.

Description of drawings

Fig. 1 is a schematic diagram of the outer structure of the present invention when the driving screw is inoperable;

Fig. 2 is a schematic diagram of the outer structure of the present invention in an operable state of the driving screw;

Fig. 3 is a schematic view of the inner structure of the present invention.

Detailed ways

As shown in the figure, the interlocking device includes a driving screw 1 whose rear end can be matched with the operating handle, and a sliding plate 2 installed on the panel of the handcart is arranged behind the driving screw, and the sliding plate can be moved along the horizontal guide rail. Moving left and right, there is an operating hole 3 on the slide plate at the same level as the driving screw. When the operating hole moves to face the rear end of the driving screw, the operating handle can be inserted into the operating hole to operate the driving screw; There is also a horizontal guide groove 4 on the slide plate, and a rotatable lock lever 5 is arranged on the inside of the slide plate facing the guide groove, and an operation key 6 can pass through the guide groove and cooperate with the outer end of the lock lever 5 and operate. The lock bar rotates, and the rotation of the lock bar can drive an auxiliary switch 7 connected in the circuit breaker operating mechanism control circuit. As shown in Figure 3, a crank 8 is installed on the lock bar 5, a pin 9 is installed on the edge of the crank, and one end of the pin is placed in a vertical groove 11 on the slider 10, and the slider 10 is fixedly installed on the On the slide plate 2, the swing of the crank and the pin shaft can drive the slide plate 2 to move through the slide block 10. The slide plate 2 also has a pin hole 12 that is flat with the above-mentioned guide groove 4 and has a diameter smaller than the width of the guide groove. The pin hole and the guide groove communicate with each other through a horizontal narrow groove 13 whose width is smaller than the diameter of the pin hole. The inner side is also provided with a spring pin 14, and the inner side of the spring pin is pressed with a spring 15 that can make the spring pin eject outwards, and a button 16 with a diameter smaller than the spring pin is arranged on the outside of the spring pin. , the spring pin 14 can extend into the pin hole 12 under the action of the spring 15, so that the slide plate cannot move.

The working process of the device of the present invention is: when the circuit breaker is in the opening state, press the button 16 to make the spring pin 14 withdraw from the pin hole 12, insert the operation key 6, and turn it clockwise by 90 degrees, and the operation key drives the lock lever 5 to rotate 90 degrees. At this time, the rotation of the locking bar drives the auxiliary switch 7 to switch, so that the circuit breaker can no longer be closed, and the operating key cannot be pulled out at this time. When the lock rod 5 rotates, the crank 8 and the slider 10 drive the slide plate 2 to move, so that the operation hole 3 faces the drive screw (the position shown in Figure 1). position, pull out the operating handle, press the button 16 again, turn the operating key 6 90 degrees counterclockwise, and then pull out the operating key. At the same time, the auxiliary switch completes the switching of 7, and the movement process of the handcart from the test position to the working position is completed. At this time, the operating handle cannot operate the driving screw. The movement process of the handcart from the working position to the test position is the same as above.

Claims (2)

1. An interlocking device for a handcart propulsion mechanism of a circuit breaker, which includes a driving screw (1) whose rear end can be matched with an operating handle, and is characterized in that: behind the driving screw, there is a The sliding plate (2) on the top of the sliding plate can move left and right along the horizontal guide rail. There is an operation hole (3) on the sliding plate at the same level as the driving screw rod. When the operating hole moves to the rear end of the driving screw rod , the operating handle can be inserted into the operating hole to operate the drive screw; there is also a horizontal guide groove (4) on the slide plate, and a rotatable lock lever (5) is arranged on the inside of the slide plate facing the guide groove. An operating key (6) can pass through the guide groove to cooperate with the outer end of the lock bar (5) and operate the lock bar to rotate. The rotation of the lock bar can drive an auxiliary switch (7) connected in the control circuit of the circuit breaker operating mechanism; A crank (8) is installed on the lock bar (5), and a bearing pin (9) is installed on the edge of the crank, and one end of the bearing pin is placed in a vertical groove (11) positioned on the slide block (10), and the slide block (10) is fixedly installed on the slide plate (2). 2. The interlocking device of the circuit breaker handcart propulsion mechanism according to claim 1, characterized in that: there is also a pin hole ( 12), the pin hole and the guide groove communicate with each other through a horizontal narrow groove (13) whose width is smaller than the diameter of the pin hole, and a spring pin (14) is arranged on the inside of the slide plate, and a spring pin is pressed on the inside of the spring pin to make the spring The spring (15) that the pin ejects outwards is provided with a button (16) whose diameter is smaller than that of the spring pin. When the operation hole (3) is facing the driving screw (1), the spring pin (14) can extend into pin hole 12.

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