CN207966797U - Breaker and disconnecting switch, the interlocking mechanism of earthing switch - Google Patents

Abstract

The utility model provides an interlocking mechanism for a circuit breaker, an isolating switch and a grounding switch. switch connection, the isolating shaft sleeve is provided with a closing interlocking plate that cooperates with it, the grounding shaft is sleeved with a grounding interlocking plate that is interlocking and cooperating with it, and the lower end of the closing interlocking plate is provided with a first detent, The upper end of the ground lock plate is provided with a second detent part, and an interlocking roller is provided between the first detent part and the second detent part, and the interlocking roller has a The first state of limited cooperation with the grounding interlock plate and the second state of limited cooperation with the closing interlock plate when the second detent part is pressed. Through the design of the detent part of the closing interlocking plate and the interlocking roller, the interlocking of the grounding switch and the isolating switch can be realized to avoid misoperation.

Description

Interlock mechanism of circuit breaker, isolating switch and earthing switch

technical field

The utility model relates to the technical field of vacuum circuit breakers, in particular to an interlocking mechanism of a circuit breaker, an isolating switch and a grounding switch.

Background technique

Vacuum circuit breakers are circuit breakers that use vacuum as the insulation and arc-extinguishing medium between contacts. Because of their small size and light weight, they are widely used in distribution networks. Many industrial and mining enterprises, power plants, and substations are Use vacuum circuit breakers for protection and control of electrical equipment.

When the vacuum circuit breaker is closed, the grounding switch cannot be grounded, otherwise accidents will occur. Therefore, how to develop an interlock mechanism between the circuit breaker, the isolating switch, and the grounding switch to ensure that the grounding switch is in the closed state. It is extremely important that it will not be closed by mistake.

Utility model content

In order to overcome the above technical deficiencies, the utility model provides an interlocking mechanism of a circuit breaker, an isolating switch and a grounding switch.

The utility model provides an interlocking mechanism for a circuit breaker, an isolating switch and a grounding switch. switch connection, the isolating shaft sleeve is provided with a closing interlocking plate that cooperates with it, the grounding shaft is sleeved with a grounding interlocking plate that is interlocking and cooperating with it, and the lower end of the closing interlocking plate is provided with a first detent part, The upper end of the ground lock plate is provided with a second detent part, and an interlocking roller is provided between the first detent part and the second detent part, and the interlocking roller has The first state of limited cooperation with the grounding interlock plate and the second state of limited cooperation with the closing interlock plate when the second detent part is pressed.

The upper end of the closing interlocking plate is provided with an interlocking mechanism linked with the operating mechanism of the circuit breaker.

Both sides of the upper end of the closing chain plate are provided with interlocking grooves that form a limit fit with the interlock mechanism, and the two interlock grooves form a limit fit with the interlock mechanism when closing and opening the gate respectively.

The bottom end of the grounding chain plate is provided with a displacement groove, and a limit pin is arranged in the displacement groove. The limit pin can slide along the displacement groove, and the two ends of the displacement groove correspond to the grounding open and the grounding close respectively. two states.

The interlocking mechanism includes an interlocking operating mechanism in which a interlocking lever is cooperating with the interlocking operating mechanism. The interlocking operating mechanism drives the interlocking lever to have a first state of being limited by the closing interlocking plate and a second state of releasing the interlocking interlocking of the closing interlocking plate.

The interlocking operating mechanism includes an operating shaft, an interlocking arm that cooperates with the operating shaft, an opening roller that cooperates with the operating shaft, and an opening cam that cooperates with the opening roller. Rod linkage fit.

The interlocking operating mechanism is also provided with an auxiliary switch, and the auxiliary switch cooperates with the operating shaft through a linkage mechanism.

The chain operation mechanism is also provided with a chain plate, the chain plate is linked with the operation shaft through the buffer arm, and the chain plate has a first position limit fit with the lock plate on the surface of the box body when the chain lever is stretched out. state and the second state in which the locking plate on the surface of the box body is released from the limited fit when the locking lever is retracted.

A guide groove is arranged on the closing interlocking plate, and a guide pin shaft is arranged in the guide groove.

The beneficial effects of the utility model: through the design of the detent part of the closing chain plate and the chain roller, when the gate is closed, the detent part of the closing chain plate forms a limit between the chain roller and the detent part of the grounding chain plate. The grounding interlocking plate can be locked to prevent the grounding switch from being misoperated in the closing state. Only in the opening state can the locking state of the grounding interlocking plate be released and the operation can be carried out safely. At the same time, when the grounding switch is closed, the detent part of the grounding interlocking plate makes the interlocking roller and the closing interlocking plate form a limited fit, so as to prevent the isolating switch from being misoperated after the grounding switch is closed.

Description of drawings

Fig. 1 is a schematic diagram of the state of the grounding joint of the present invention.

Fig. 2 is a schematic diagram of the state of the isolator of the present invention.

Fig. 3 is a schematic diagram of the isolation and grounding states of the present invention.

Fig. 4 is a structural schematic diagram of the closing interlocking plate and the grounding interlocking plate of the present invention.

Fig. 5 is a rear view of the utility model.

FIG. 6 is an enlarged schematic view of point A in FIG. 5 .

Fig. 7 is a partially enlarged schematic diagram of the chain operation mechanism of the present invention.

Fig. 8 is a structural schematic diagram of the closing interlock plate of the present invention.

Fig. 9 is a schematic structural view of the grounding interlocking plate of the present invention.

Fig. 10 is a schematic diagram of the structure of the locking plate and the locking plate of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is further described:

As shown in the figure, the utility model provides an interlock mechanism between a circuit breaker, an isolating switch and a grounding switch, which includes an isolating shaft 4 and a grounding shaft 7, and the isolating shaft 4 is connected to the isolating switch through an isolating operating mechanism. The isolation operating mechanism includes a first isolation arm 21 which is linked and matched with the isolation shaft 4, the first isolation arm 21 is connected with the second isolation arm 23 through the isolation linkage shaft 22, and the second isolation arm 23 is connected with the isolation shaft I1, The isolation shaft I1 cooperates with the isolation blade 9, and the isolation shaft I1 is connected with the extension spring through the third isolation arm 24, and the other end of the extension spring is fixed on the shell.

The grounding shaft 7 is connected to the grounding switch 8 through a grounding operation mechanism, and the grounding operation mechanism includes a grounding arm that cooperates with the grounding shaft, and the grounding arm is connected to the housing through a tension spring.

The isolation shaft 4 is provided with a closing interlocking plate 3 for linkage and cooperation with it, the grounding shaft 7 is provided with a grounding interlocking plate 6 for interlocking and cooperating with it, and the lower end of the closing interlocking plate 3 is provided with a first detent part 18, the first detent part 18 is a structure in which one end is recessed and the other end protrudes.

The upper end of the grounding interlocking plate 6 is provided with a second detent part 20, and the second detent part 20 is also a structure in which one end is recessed and the other end protrudes.

An interlocking roller 5 is provided between the first detent part 18 and the second detent part 20, and one end of the interlocking roller 5 is hinged on the shell.

The interlocking roller 5 has a first state of limited fit with the grounding interlock plate 6 when the first detent part 18 presses, and forms a detent fit with the closing interlock plate 2 when the second detent part 20 presses. the second state of .

When the isolating switch is closed, the closing interlocking plate 3 is driven to rotate by the isolation shaft 4, and at the same time, the protrusion of the first detent part 18 of the closing interlocking plate 3 will press the interlocking roller against the second detent of the grounding interlocking plate. In the depression of the sub-part 20, and because the first detent part 18 presses in the interlocking roller, the ground interlocking plate is then limited by the interlocking roller 5 and cannot rotate. The earthing switch cannot be operated at this time.

When the isolating switch is opened, the closing interlocking plate 3 is driven to rotate by the isolation shaft, and the protrusion of the first detent part 18 of the closing interlocking plate 3 leaves the upper end of the interlocking roller 5. At this time, the interlocking roller 5 is interlocked to the ground. The limit of the plate is released, and the grounding interlock plate can be selected at this time, so the grounding switch can be operated at this time.

When the grounding switch is closed, the grounding shaft 7 drives the grounding chain plate to rotate. At this time, the protrusion of the second detent part of the grounding chain plate presses the chain roller upwards, so that the chain roller is embedded in the first detent of the closing chain plate. In the depression of the sub-part, the locking roller can limit the closing locking plate, so that the disconnecting switch cannot be operated.

The upper end of the closing interlocking plate is provided with an interlocking mechanism linked with the operating mechanism of the circuit breaker. The interlock mechanism can limit the position of the closing interlock plate when the isolating switch is opened and closed, so as to prevent it from being misoperated when opening/closing.

Both sides of the upper end of the closing chain plate 3 are provided with interlocking grooves 16 that form a limit fit with the interlock mechanism, and the two interlock grooves 16 form a limit fit with the interlock mechanism when closing and opening the gate respectively. That is to realize the restriction of two states through the interlock mechanism, that is, when the gate is closed, the interlock mechanism can be used to limit the closing chain plate so that it cannot be opened manually, or when the gate is open, the interlock mechanism can be used to control the closing position. The limit of the chain plate makes it impossible to close the gate manually.

The closing chain plate 3 is provided with a guide groove 17, and a guide pin 10 is arranged in the guide groove 17. The guide groove 17 is an arc-shaped structure, and is distributed with the isolation shaft as the center of the circle, so as to limit the closing chain. The trajectory of the board.

The bottom end of the grounding chain plate is provided with a displacement groove 19, and a limit pin 11 is arranged in the displacement groove 19. The limit pin 11 can slide along the displacement groove, and the two ends of the displacement groove 19 correspond to The two states of grounding open and grounding are distributed in a circular arc with the grounding axis as the center, and are used to limit the moving track of the grounding interlocking plate.

The interlocking mechanism includes an interlocking operating mechanism with a interlocking linkage between the interlocking lever 2 and the interlocking operating mechanism. The interlocking lever is driven by the interlocking operating mechanism to have a first state of limiting the position of the closing interlock plate and a second state of releasing the interposition of the interlocking interlocking plate. . The interlocking lever can be pulled by the interlocking operating mechanism, extended or retracted, so as to limit and release the position of the closing interlocking plate.

The interlocking operating mechanism includes an operating shaft 25, which is directly used to control the control of the operating mechanism in the phase pole, and the interlocking arm 14 is set on the operating shaft 25, and the interlocking arm 14 is connected with The locking lever 2 is connected to drive the locking lever 2 to move, and the opening roller 15 is set on the operating shaft. The upper end of the opening roller 15 is correspondingly provided with the opening cam 12. When the opening cam 12 rotates, it will Touch the opening roller to drive the operating shaft to rotate, so that the chain lever retracts, and the limit to the closing chain plate is released, that is, after the automatic opening, the locking of the chain lever is released, and the isolation switch can be manually opened. Closing operation, to avoid manual operation in the closing state.

At the same time, the interlocking operation mechanism is also provided with an auxiliary switch, and the auxiliary switch cooperates with the operating shaft through a linkage mechanism. The linkage mechanism includes an auxiliary switch arm that cooperates with the auxiliary switch. Cooperating with the crank arm arranged on the operating shaft, the extension and retraction operation of the chain lever can also be realized by using the auxiliary switch.

Described interlock operation mechanism is also provided with interlock plate 13, and described interlock plate is interlocked with operating shaft through the buffer arm and cooperates, and described interlock plate has the lock plate 26 that constitutes limit fit with the box body surface when interlock lever stretches out. The first state and the second state in which the locking plate on the surface of the box body is released for limited cooperation when the locking rod is retracted. The locking plate is driven by the operating shaft, and there is a chute on it, and a positioning pin is arranged in the chute, so as to determine the movement track of the locking plate. , at this time, the end of the chain plate is placed on the upper end of the lock plate, and the lock plate is pressed to prevent it from opening upward from the outside, so as to avoid manual opening of the brake by opening the lock plate in the closing state, and only when the chain lever retracts When the limit state of the closing lock plate is released, the lock plate is driven to move to the inside, not in the direction of movement of the lock plate, so that the lock plate can be opened for manual opening and closing or grounding operation.

The embodiments should not be regarded as limiting the utility model, and any improvement based on the spirit of the utility model should be within the protection scope of the utility model.

Claims (9)

1. An interlocking mechanism for a circuit breaker, an isolating switch and a grounding switch, which includes an isolating shaft and a grounding shaft, the isolating shaft is connected to the isolating switch through an isolating operating mechanism, and the grounding shaft is connected to the grounding switch through a grounding operating mechanism , characterized in that: the isolating shaft sleeve is provided with a closing chain plate for interlocking cooperation with it, the grounding shaft is provided with a grounding interlocking plate for interlocking cooperation with it, and the lower end of the closing interlocking plate is provided with a first detent part, the upper end of the ground lock plate is provided with a second detent part, and an interlock roller is provided between the first detent part and the second detent part, and the interlock roller has a The first state of limited cooperation with the grounding interlock plate when pressing and the second state of limited cooperation with the closing interlock plate when the second detent part is pressed. 2. The interlocking mechanism of the circuit breaker, the isolating switch and the grounding switch according to claim 1, wherein the upper end of the closing interlocking plate is provided with an interlocking mechanism linked with the operating mechanism of the circuit breaker. 3. The interlocking mechanism of circuit breaker, isolating switch, and grounding switch according to claim 1, characterized in that, both sides of the upper end of the closing interlocking plate are provided with interlocking grooves that form a limited fit with the interlocking mechanism, And the two interlocking grooves respectively form limit cooperation with the interlocking mechanism when closing and opening the gate. 4. The interlocking mechanism of circuit breaker, isolating switch and grounding switch according to claim 1, characterized in that, the bottom end of the grounding interlocking plate is provided with a displacement groove, and a limit pin is arranged in the displacement groove, The limiting pin shaft can slide along the displacement groove, and the two ends of the displacement groove correspond to the two states of grounding open and grounding respectively. 5. The interlocking mechanism of circuit breaker, isolating switch and grounding switch according to claim 2, characterized in that, the interlocking mechanism includes a chaining operation mechanism in which a chain lever cooperates with it, and the chain lever is driven by the chain operation mechanism It has a first state of being limited by the closing interlock plate and a second state of releasing the limit of the closing interlock plate. 6. The interlocking mechanism of circuit breaker, isolating switch, and grounding switch according to claim 5, characterized in that, the interlocking operating mechanism includes an operating shaft, an interlocking arm that cooperates with the operating shaft, and an interlocking arm that is linked with the operating shaft The matching opening roller, the opening cam cooperating with the opening roller, and the interlocking crank arm and the chain lever are linked and matched. 7. The interlocking mechanism of circuit breaker, isolating switch, and grounding switch according to claim 6, characterized in that, the interlocking operating mechanism is also provided with an auxiliary switch, and the auxiliary switch cooperates with the operating shaft through a linkage mechanism . 8. The interlocking mechanism of circuit breaker, isolating switch, and grounding switch according to claim 6 or 7, characterized in that, the interlocking operating mechanism is also provided with an interlocking plate, and the interlocking plate is connected to the operating shaft through the buffer arm. Linkage cooperation, the locking plate has a first state of limited fit with the lock plate on the surface of the box body when the chain rod is stretched out and a second state of limited fit with the lock plate on the surface of the box body when the chain rod is retracted. state. 9. The interlocking mechanism of circuit breaker, isolating switch and grounding switch according to claim 1 or 3, characterized in that a guide groove is provided on the closing interlock plate, and a guide pin is provided in the guide groove axis.