CN111952085A - An isolation switch fault switching device - Google Patents

Abstract

The invention discloses an isolation switch fault switching device, which relates to the technical field of electric power maintenance equipment, in particular to an isolation switch fault switching device. The device includes a base, a power unit and a contactor group, the power unit is arranged on the base, the contactor group receives an external control signal, and the contactor group controls the power unit to perform opening and closing actions on the external isolation switch. The device uses an electric motor as the power source, and the power unit is connected to the input end of the manual operating mechanism of the isolation switch, which saves manpower, keeps the staff away from the isolation switch, and ensures the safety of the staff. The device is also provided with a signal transmitting unit and a signal receiving unit. The signal transmitting unit and the signal receiving unit are connected by radio communication. The staff can hold the signal transmitting unit and send radio signals to the signal receiving unit to control the action of the power unit. The large range allows the staff to be guaranteed to stay away from electrical hazards.

Description

An isolation switch fault switching device

technical field

The invention relates to the technical field of electric power maintenance equipment, in particular to an isolation switch fault switching device.

Background technique

The isolation switch is an important switching device in the power system, which mainly plays the role of isolating the power supply. It plays the role of isolating the maintenance part and the charged body in the circuit maintenance. When the isolating switch is in the open position, there are insulation distances and obvious disconnection marks between the contacts that meet the specified requirements; in the closed position, it can carry the current under normal circuit conditions and abnormal conditions (such as short circuit) within the specified time. Under the current, its operation status directly affects the transmission and distribution of electric energy and the safe and reliable operation of the system.

The isolation switch can be divided into basic part, insulator part, transmission part, operating mechanism part and conductive part according to the function. The operating mechanism of 35kV and above isolation switch adopts electric operating mechanism. The electric operating mechanism is driven by an electric motor, transmits the force to the main shaft of the transmission part through the mechanical reduction device, drives the intermediate rotating insulator to rotate through the connecting rod transmission, and drives the moving contact of the conductive part to insert the static contact to complete its opening and closing operation. Like the circuit breaker operating mechanism, it provides operating force to the action of the isolating switch through manual, electric, pneumatic and hydraulic.

Electrical equipment is divided into three states: running, standby (cold standby and hot standby), and maintenance. Switching electrical equipment from one state to another state or changing the operating mode of the system by operating the isolating switch, circuit breaker, and hanging and dismantling the ground wire is called a switch-off operation.

The electric operating mechanism of the isolation switch is usually driven by an electric motor, and the force is transmitted to the main shaft of the mechanism through the mechanical reduction device, and the intermediate rotating insulator is driven to rotate through the connecting rod transmission, so that the moving contact of the conductive tube is inserted into or separated from the static contact to complete its opening and closing. brake operation.

The manual operating mechanism of the isolating switch uses the main knife switch of the isolating switch to operate the connecting rod on the bearing seat at the bottom of the insulator through the main shaft of the manual operating mechanism. When the vertical pull rod of the manual operating mechanism rotates, the main knife switch is driven by the operating insulator and rotates on the horizontal plane, so that the moving contact of the conductive tube is inserted into or withdrawn from the static contact mounted on the column insulator to realize opening and closing.

The secondary circuit of the isolation switch electric operating mechanism is an electrical circuit formed by connecting the secondary equipment according to certain functional requirements, so as to realize the functions of monitoring, measuring, controlling, protecting and adjusting the working conditions of the primary system equipment. The structure is complex, consisting of opening and closing relays, AC and DC contactors, phase loss protection relays, thermal overload relays, travel switches, micro switches, switching handles, buttons and other secondary components.

Because the isolation switch is outdoors for a long time, the operating environment is harsh, and the failure rate of the secondary components is high. During the switching operation process, the electric operation often occurs, which seriously affects the reliability of the power supply.

When there is a defect that the isolation switch cannot be operated electrically, there are generally two ways to deal with it.

One is to find the cause of the defect, and continue to operate after replacing the damaged secondary components. However, due to the complexity of the secondary circuit of the isolation switch operating mechanism, it takes too long to find and deal with the defects of the secondary circuit, which seriously affects the speed of the switching operation.

The second is to take manual operation. The isolation switch equipped with the electric operating mechanism usually uses the operating handle for manual operation. During manual operation, be careful in the process of shaking in the opposite direction. Once you hear a subtle discharge sound The isolation switch is quickly closed. During the closing process, the operator needs to master the closing force. However, if the staff exerts too much force during the use process, the insulator part of the isolation switch will break during the operation, which is a serious threat. Safety of manual operators.

And the operation sequence of the isolation switch and the circuit breaker is also particularly important. The power outage operation must be operated in the order of opening the circuit breaker, the load side isolation switch, and the power side isolation switch, and the power transmission operation sequence is the opposite.

Two important operations must be carried out before pulling the isolating switch: First, check that the circuit breaker is in the disconnected position, in order to prevent the circuit breaker from actually being disconnected when the isolating switch is pulled, resulting in the misoperation of the isolating switch with load. If the circuit breaker is not disconnected open, pull the load-side isolating switch first, the arc short circuit occurs within the protection range of the circuit breaker; if the circuit breaker trips; The busbar short-circuited and tripped the upper-level circuit breaker, expanding the scope of the accident.

Thirdly, the possibility that the circuit breaker will be closed by accident due to some unexpected reasons should also be considered during the operation of pulling the isolating switch. Therefore, the closing power supply of the circuit breaker should also be disconnected. Operators who manually operate the isolation switch need to pass the special training and test before they can operate. In the switching operation, the working status of the operator and the preparation steps before the operation are relatively high. It is necessary to issue and accept the operation task and fill in the operation ticket. , review and check the operation ticket, release and accept the operation execution order, and then perform the switch-off operation.

SUMMARY OF THE INVENTION

The invention provides an isolation switch fault switching device, which is used to solve the problem that the isolation switch needs to be operated manually when the fault occurs.

The present invention adopts following technical scheme:

An isolation switch fault switching device, comprising: a base, a power unit and a contactor group, the power unit is arranged on the base, the contactor group receives an external control signal, and the contactor group controls the power The unit performs opening and closing actions on the external isolation switch;

The base includes: a base body, a telescopic rod slidably connected to the base body, a platform fixedly connected to the telescopic rod, and a set screw threadedly connected to the base body, the set screw is used to fasten the The telescopic rod is locked on the base body; the power unit comprises: a motor fixedly connected with the platform, a clamping rod and a clamping joint, the first end of the clamping rod is fixedly connected with the motor, so the second end of the clamping rod is clamped with the clamping joint;

The contactor group is electrically connected to the motor.

Further, it also includes: a signal transmitting unit and a signal receiving unit, the signal transmitting unit receives an external input signal, the signal transmitting unit outputs a radio signal according to a predetermined condition; the signal receiving unit receives the radio signal from the signal transmitting unit The signal receiving unit controls the action of the contactor group according to predetermined conditions, so as to control the rotation direction of the motor; the signal transmitting unit is connected to the signal receiving unit in communication, and the contactor group is connected to the signal receiving unit. The unit is electrically connected.

Further, the signal receiving unit includes: a first controller, a wireless receiving module and a relay group; the wireless receiving module converts the received radio signal into an electrical signal, and the first controller receives data from the wireless receiving module module, the first controller outputs a control signal to the relay group according to a predetermined condition, and the relay group controls the action of the contactor group; the wireless receiving module and the relay group are respectively connected with the first relay group. A controller is electrically connected, and the relay group is electrically connected with the contactor group.

Further, the signal transmission unit includes: a key, a second controller and a wireless transmission module, the second controller receives the input of the key, and the second controller controls the wireless transmission module to transmit according to a predetermined condition A radio signal, the button and the wireless transmitting module are respectively electrically connected with the second controller.

Further, the signal receiving unit further comprises: an indicator light, the indicator light is used to indicate the rotation direction of the motor, and the indicator light is electrically connected to the first controller.

Further, the motor is an asynchronous motor, and the motor is provided with a worm gear reducer.

Further, the seat body is provided with legs, the legs are hinged with the seat body, and there are at least three legs.

Further, the first end of the clip joint is clipped with the second end of the clip rod, and the second end of the clip joint is used to clip the input end of the manual operating mechanism of the external isolation switch.

Further, the second end of the snap joint is provided with a first cuboid and a second cuboid extending along the axial direction of the snap joint, the first cuboid is arranged above the second cuboid, the first cuboid and The second cuboid is provided with threaded holes penetrating the upper and lower surfaces.

Further, the supporting leg is provided with a counterweight block, and the counterweight block is provided at an end close to the grounding of the supporting leg.

The positive effects of the present invention are as follows:

An isolation switch fault switching device includes: a base, a power unit and a contactor group, the power unit is arranged on the base, the contactor group receives external signal input, and controls the power unit to perform opening and closing actions on the external isolation switch. The device uses a motor as a power source, which is connected to the input end of the manual operating mechanism of the isolation switch, saving manpower, and does not need to operate in the area close to the isolation switch, so that the staff is far away from the isolation switch, and the safety of the staff is guaranteed. The device is also provided with a base, and the base is provided with a telescopic rod that can adjust the height of the motor, thereby adapting to different setting positions of the isolation switch, making it more handy and convenient to adjust during use. The contactor group of the device is used to control the rotation direction of the motor, eliminating the trouble of changing the rotation direction of the motor through wiring every time it is used.

The device is also provided with a signal transmitting unit and a signal receiving unit, the signal transmitting unit and the signal receiving unit are connected by radio communication, the staff can hold the signal transmitting unit to send radio signals to the signal receiving unit, and the staff holding the signal transmitting unit can Moving within a large range allows workers to be protected from electrical hazards. The device can be operated remotely, and can be operated while observing the status of the isolation switch, and can be adjusted according to the status at any time. The signal receiving unit is also equipped with an indicator light, which can clearly observe whether the relay is operating.

As a further improvement, the seat body is provided with legs that can be stored. When it is needed, the legs are released to form a stable grounding structure. The legs are retracted after use to save space and facilitate transportation and storage. The end of the leg that is close to the ground is provided with a counterweight, which can adjust the overall center of gravity and counteract the reverse torque generated by the motor during the rotation process, making the whole more stable.

The clamping joint matched with the clamping rod is provided with a threaded hole, and the threaded hole is provided with a corresponding bolt, which can adapt to the input ends of different isolation switch manual operating mechanisms.

Description of drawings

1 is a functional block diagram of an embodiment of the present invention;

2 is a schematic diagram of the overall structure of an embodiment of the present invention;

3 is a schematic diagram of a motor control circuit according to an embodiment of the present invention;

4 is a schematic diagram of a circuit of a signal receiving unit according to an embodiment of the present invention;

5 is a schematic diagram of a signal transmission unit circuit according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the appearance of a card joint according to an embodiment of the present invention.

In the picture:

body 1;

telescopic rod 2;

platform 3;

motor 4;

Set screw 5;

Clamping rod 6;

card connector 7;

Worm gear reducer 8;

outrigger 9;

Counterweight 10.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

As shown in Figure 1-6, an isolation switch fault switching device includes: a base, a power unit and a contactor group, the power unit is arranged on the base, the contactor group receives an external control signal, and the contactor group controls the power unit pair The external isolation switch implements the opening and closing action;

The base includes: a base body 1, a telescopic rod 2 slidably connected with the base body 1, a platform 3 fixedly connected with the telescopic rod 2, and a set screw 5 threadedly connected with the base body 1. The set screw 5 is used to connect the telescopic rod 2 It is locked on the base body 1; the power unit includes: a motor 4, a clamping rod 6 and a clamping joint 7 fixedly connected with the platform 3, the first end of the clamping rod 6 is fixedly connected with the motor 4, and the second end of the clamping rod 6 is connected to the motor 4. The card connector 7 is snapped.

The contactor group is electrically connected to the motor 4 .

More specifically, the seat body 1 is provided with a rectangular hole chute, the rectangular hole penetrates the seat body 1 up and down, the telescopic rod 2 is a rod with a rectangular cross-section, and the first end of the telescopic rod 2 is inserted into the rectangular hole of the seat body 1 to extend and retract. The second end of the rod 2 is provided with a platform 3, the platform 3 is a flat plate, the lower surface of the platform 3 is fixedly connected with the second end of the telescopic rod 2, the telescopic rod 2 can slide up and down along the rectangular hole of the base body 1, so as to realize the adjustment of the platform 3 height effects.

A threaded hole is provided on the side perpendicular to the rectangular hole chute of the seat body 1. The threaded hole is a through hole and penetrates to the inner side of the rectangular hole. The set screw 5 is threadedly matched with the threaded hole to slide the telescopic rod up and down. 2 After adjusting the height of the platform 3 to an appropriate position, the telescopic rod 2 is fixed on the base body 1 by tightening the set screw 5.

The body of the motor 4 is fixedly connected to the platform 3, the motor 4 is provided with an output shaft, the output shaft is fixedly connected with the first end of the clamping rod 6, and the second end of the clamping rod 6 is clamped with the first end of the clamping joint 7. This embodiment The method is a flat key connection, that is, the second end of the clamping rod 6 is a cylindrical body with a flat key, and the first end of the clamping joint 7 is a matching form, that is, a hole provided with a key slot.

In use, the second end of the clamping rod 6 with the flat key can be inserted into the first end of the clamping joint 7 . The second end of the snap joint 7 is used to connect with the input end of the manual operation mechanism of the isolation switch, so as to realize the output of the torque of the motor 4 to the manual operation mechanism of the isolation switch.

On the control circuit of the motor 4, a contactor group is used to control the start, stop and rotation direction of the motor. More specifically, in this embodiment, the motor 4 adopts an asynchronous motor, the relay group includes two contactors, the first end of the main circuit of the first contactor is electrically connected to the external AC power supply, and the other end is electrically connected to the three windings of the motor 4 . , when the coil of the first contactor is energized, the motor 4 rotates in the first direction; one end of the main circuit of the second contactor is electrically connected to the external AC power supply, and the other end is electrically connected to the three windings of the motor 4. When the first contactor is electrically connected to the three windings of the motor 4 When the coil is energized, the motor 4 rotates in the second direction; when neither the first contactor coil nor the second contactor coil is energized, the motor 4 stops rotating.

The first contactor and the second contactor are different in the connection mode of the motor 4. The difference lies in the reversed phase sequence of the access end of the motor 4, so as to realize the effect of different rotation directions of the motor 4.

As shown in the figure, KM1 is the first contactor, KM2 is the second contactor, K1 is the switch that controls the coil of the first contactor, K2 is the switch that controls the coil of the second contactor, K3 is the switch that controls the coil of the first contactor and The switch of the second contactor coil, when both K3 and K1 are closed, the first contactor coil is energized, and the motor 4 rotates in the first direction; when both K3 and K2 are closed, the second contactor coil is energized, and the motor 4 is energized. Rotate in the second direction; when K3 is disconnected, neither the first contactor coil nor the second contactor coil is energized, and the motor 4 stops rotating.

This method uses the motor 4 as the power source, which is connected to the input end of the manual operating mechanism of the isolation switch, which saves manpower, keeps the staff away from the isolation switch, and ensures the safety of the staff. The device is also provided with a base, and the base is provided with a telescopic rod 2 that can adjust the height of the motor 4, so as to adapt to different installation positions of the isolation switch, making it more convenient to use and easy to adjust. The device is also provided with a contactor group, and the contactor group is used to control the rotation direction of the motor 4, so as to avoid the trouble of changing the rotation direction of the motor through wiring each time it is used.

Further, it also includes: a signal transmitting unit and a signal receiving unit, the signal transmitting unit receives an external input signal, and the signal transmitting unit outputs a radio signal according to a predetermined condition; the signal receiving unit receives a radio signal from the signal transmitting unit, and the signal receiving unit is based on the predetermined condition. The action of the contactor group is controlled to control the rotation direction of the motor 4; the signal transmitting unit is connected in communication with the signal receiving unit, and the contactor group is electrically connected with the signal receiving unit.

Further, the signal receiving unit includes: a first controller, a wireless receiving module and a relay group; the wireless receiving module converts the received radio signal into an electrical signal, the first controller receives the electrical signal from the wireless receiving module, and the first control The controller outputs a control signal to the relay group according to a predetermined condition, and the relay group controls the action of the contactor group; the wireless receiving module and the relay group are respectively electrically connected with the first controller, and the relay group is electrically connected with the contactor group.

Further, the signal transmitting unit includes: a button, a second controller and a wireless transmitting module, the second controller receives the input of the button, the second controller controls the wireless transmitting module to transmit radio signals according to a predetermined condition, and the button and the wireless transmitting module are respectively connected with the wireless transmitting module. The second controller is electrically connected.

Further, the signal receiving unit further includes: an indicator light, which is used to indicate the rotation direction of the motor 4, and the indicator light is electrically connected to the first controller.

More specifically, the device is also provided with a signal transmitting unit and a signal receiving unit for remotely controlling the power control unit. The signal transmitting unit in this embodiment includes a first controller IC1, a key and a wireless transmitting module IC3, The first controller IC1 receives the operation of the key, and controls the wireless transmitting module IC3 to send the radio signal to the signal receiving unit.

In this embodiment, the wireless transmission module IC3 is a 315MHZ wireless transmission module, and the model of the first controller IC1 is AT89C2051, which is a low-voltage 8-bit low-voltage 8-bit flash programmable erasable read-only memory (EEPROM) with 2K bytes. CMOS microprocessor. It operates in the 2.7-6V voltage range, is manufactured using ATMEL's high-density non-volatile memory technology and is compatible with the industry standard MCS-51 instruction set and pinout.

The AT89C2051 provides the following standard functions: 2K bytes of flash memory, 128 bytes of RAM, 15 programmable I/O interfaces (including output ports for directly driving LEDs), two 16-bit timers, a five-vector two-level interrupt structure , a full-duplex serial port, a precision analog comparator, and two optional software power-saving modes of operation. Idle mode stops CPU work but allows RAM, timer/counter, serial work port and interrupt system to continue to work. The P1 port of the first chip IC1 is an 8-bit bidirectional I/O port. The ports P1.2~P1.7 provide internal pull-up resistors. The P1 port output buffer can absorb 20mA current and can directly drive the LED display. When ports P1.2~P1.7 are used as inputs and pulled low externally, they will output current due to internal pull-up resistors.

The P3.1 port of the first controller IC1 is electrically connected to the wireless transmitting module IC3. Ports P1.3, P1.5 and P1.7 of the first controller IC1 are electrically connected to the buttons S1, S2 and S3 respectively. When the button is pressed, the port electrically connected to it is at a low level, and when the button is up , the corresponding port is high.

The signal receiving unit includes a second controller IC2, a relay group and a wireless receiving module IC4, the wireless receiving module IC4 receives the radio signal transmitted by the wireless transmitting module IC3, and the wireless receiving module IC4 converts the received radio signal into a radio signal that can be used by the second controller. The electrical signal received by IC2 and the electrical signal received by the second controller IC2 control the relay group, so as to achieve the technical effect of controlling the rotation direction of the motor 4 .

The wireless receiving module IC4 adopts a 315MHz wireless receiving module, the second controller IC2 adopts an AT89C2051 microcontroller, the 315MHz wireless receiving module is provided with an output signal output terminal, and the 315MHz wireless receiving module signal output terminal is electrically connected to the P3.0 port of the second controller IC2 .

The relay group includes the relay K1, the relay K2 and the relay K3. The relay K1 coil, the relay K2 coil and the relay K3 coil are respectively electrically connected to the P1.7 port, the P1.5 port and the P1.3 port of the second controller IC2. When the IC2 port of the second controller connected to the relay coil outputs a low level, the relay coil is energized, the normally open contact of the relay is closed, and the normally closed contact of the relay is disconnected.

In addition, the signal receiving unit also includes an indicator light, which is connected in series with the relay coil. When the relay coil is energized, the indicator light is on, and when the relay coil is de-energized, the indicator light is off.

The signal transmitting unit and the signal receiving unit of the device express different signal instructions by adjusting the interval time of transmitting signals.

As in this embodiment, after receiving the signal pressed by the button S1, the first controller IC1 of the signal transmitting unit controls the wireless transmitting module IC3 to output the radio signal for 10 milliseconds, and then controls the wireless transmitting module IC3 to stop outputting the radio signal for 10 milliseconds; After receiving the signal pressed by the button S2, the first controller IC1 of the transmitting unit controls the wireless transmitting module IC3 to output the radio signal for 12 milliseconds, and then controls the wireless transmitting module IC3 to stop outputting the radio signal for 8 milliseconds; the first controller of the signal transmitting unit After IC1 receives the signal pressed by the button S3, it controls the wireless transmitting module IC3 to output the radio signal for 14 milliseconds, and then controls the wireless transmitting module IC3 to stop outputting the radio signal for 6 milliseconds.

The second controller IC2 of the signal receiving unit receives the radio signal through the wireless receiving module IC4, and calculates the time interval of receiving the radio signal and the time interval of not receiving the radio signal. As in this embodiment, the signal receiving unit calculates from the timer of the second controller IC2. It is known that the time interval for receiving radio signals is 10 milliseconds, and the radio signal is not received for 10 milliseconds, so that the signal transmitting unit presses the S1 button at this time; the signal receiving unit calculates the time of receiving radio signals from the timer of the second controller IC2 The interval is 12 milliseconds, and no radio signal is received for 8 milliseconds, so it is known that the signal transmitting unit presses the S2 button at this time; To the radio signal for 6 milliseconds, it is known that the S3 button of the signal transmitting unit is pressed at this time.

In operation, the closing process: after the staff presses the S1 button, the closing command is sent by the signal transmitting unit to the signal receiving unit. After the signal receiving unit receives the "closing" command, the control relay K1 is energized and closed, K1 The normally open node of the relay is closed. After 0.5 seconds, the K1 relay returns to its normal state. The closing contactor KM1 in the control circuit is energized and closed. The KM1 contactor maintains itself through its own normally open node, and the three-phase AC power of the motor 4 is connected and starts to close. After closing in place, press the S3 button of the remote control device, the normally closed node of the K3 relay is disconnected, the isolation switch closing process is over, and the K3 relay returns to the normal state after 0.5 seconds.

Opening process: After the operator presses the S2 button, the opening command is sent by the signal transmitting unit to the signal receiving unit. After the signal receiving unit receives the "opening" command, the control relay K2 is energized and closed, and the K2 relay is normally open. Closed, the opening contactor KM2 in the control circuit of the motor 4 is energized and closed, the KM2 contactor is self-retaining through its own normally open node, the three-phase AC power of the motor 4 is connected to start the opening, and the relay K2 returns to normal after 0.5 seconds, and the opening is in place. Then press the S2 button, the normally closed node of the K3 remote control relay is disconnected, the isolation switch opening process ends, and the K3 relay returns to normal after 0.5 seconds.

The device is also provided with a signal transmitting unit and a signal receiving unit. The signal transmitting unit and the signal receiving unit are connected by radio communication. The staff can hold the signal transmitting unit to send instructions to the signal receiving unit, and its moving range is large, which makes the staff Completely guaranteed to stay away from electrical hazards. The device can be operated remotely, and can be operated while observing the status of the isolation switch, and can be adjusted according to the status at any time. The signal receiving unit is also equipped with an indicator light, which can clearly observe whether the relay is operating.

Further, the motor 4 is an asynchronous motor, and the motor 4 is provided with a worm gear reducer 8 .

Further, the base body 1 is provided with support legs 9, the support legs 9 are hinged with the base body 1, and there are at least three support legs 9.

Further, the first end of the clamping joint 7 is clamped with the second end of the clamping rod 6, and the second end of the clamping joint 7 is used for clamping the input end of the manual operating mechanism of the external isolation switch.

Further, the second end of the snap joint 7 is provided with a first cuboid and a second cuboid extending along the axial direction of the snap joint 7, the first cuboid is arranged above the second cuboid, and both the first cuboid and the second cuboid are provided with up and down holes. Threaded holes on the surface.

Further, the outrigger 9 is provided with a counterweight 10 , and the counterweight 10 is provided at one end close to the ground of the outrigger 9 .

More specifically, in order to ensure that the locking effect can be achieved during closing or opening, the output end of the motor 4 is provided with a worm gear reducer 8. After the motor 4 stops rotating, the position of the output end of the motor 4 can be maintained. External force causes changes in closing or opening, thereby ensuring the safety of equipment and staff. In addition, the worm gear reducer 8 has the effect of increasing the action torque and slowing down the action speed, further reducing the design power of the motor 4, and prolonging the reaction time of the staff when problems occur during the action process.

As a further improvement, the base body 1 is provided with support legs 9 that can be stored. When it needs to be used, the support legs 9 are released to form a stable grounding structure. After use, the support legs 9 are retracted to save floor space and facilitate transportation and storage. . The end of the outrigger 9 close to the ground is provided with a counterweight 10, which can adjust the center of gravity of the whole, offset the reverse torque generated by the motor 4 during the rotation process, and make the whole more stable.

The card joint 7 adapted to the clip rod 6 is in a detachable form, and the form of the card joint 7 can adapt to the input end of a variety of different isolation switch manual operating mechanisms. There are threaded holes, and bolts matching the threaded holes are installed on the threaded holes, and the input end of the manual operating mechanism of the isolating switch is clamped by the pressing force of the bolts, so as to realize the rotation of the input end of the manual operating mechanism of the isolating switch driven by the clamping rod 6 technical effect.

The above-mentioned embodiments are only preferred embodiments of the present invention, rather than an exhaustive list of feasible implementations of the present invention. For those skilled in the art, any obvious changes made to it without departing from the principle and spirit of the present invention should be considered to be included in the protection scope of the claims of the present invention.

Claims (10)

1. A fault switching device of an isolating switch is characterized by comprising: the power unit is arranged on the base, the contactor group receives an external control signal, and the contactor group controls the power unit to perform opening and closing actions on an external isolating switch;

the base includes: the device comprises a seat body (1), an expansion link (2) connected with the seat body (1) in a sliding manner, a platform (3) fixedly connected with the expansion link (2), and a set screw (5) in threaded connection with the seat body (1), wherein the set screw (5) is used for locking the expansion link (2) on the seat body (1); the power unit includes: the motor (4), the clamping rod (6) and the clamping joint (7) are fixedly connected with the platform (3), the first end of the clamping rod (6) is fixedly connected with the motor (4), and the second end of the clamping rod (6) is clamped with the clamping joint (7);

the contact set is electrically connected to the electric motor (4).

2. The device for disconnecting switch from fault and switching back according to claim 1, further comprising: the wireless communication device comprises a signal transmitting unit and a signal receiving unit, wherein the signal transmitting unit receives an external input signal and outputs a radio signal according to a preset condition; the signal receiving unit receives a radio signal from the signal transmitting unit, and controls the action of the contact group according to a preset condition to realize the control of the rotating direction of the motor (4); the signal transmitting unit is in communication connection with the signal receiving unit, and the contact group is electrically connected with the signal receiving unit.

3. The device of claim 2, wherein the signal receiving unit comprises: the wireless receiving device comprises a first controller, a wireless receiving module and a relay set; the wireless receiving module converts a received radio signal into an electric signal, the first controller receives the electric signal from the wireless receiving module, the first controller outputs a control signal to the relay group according to a preset condition, and the relay group controls the action of the contact group; the wireless receiving module and the relay set are respectively electrically connected with the first controller, and the relay set is electrically connected with the contact set.

4. The device of claim 3, wherein the signal transmitting unit comprises: the wireless transmission device comprises a key, a second controller and a wireless transmission module, wherein the second controller receives the input of the key, controls the wireless transmission module to transmit a radio signal according to a preset condition, and is respectively and electrically connected with the second controller.

5. The device of claim 4, wherein the signal receiving unit further comprises: an indicator light for indicating a direction of rotation of the motor (4), the indicator light being electrically connected with the first controller.

6. A disconnector malfunction switching device according to claim 5, characterized in that the electric motor (4) is an asynchronous motor, and the electric motor (4) is provided with a worm gear reducer (8).

7. A disconnector malfunction switching device according to claim 6, characterized in that said base body (1) is provided with legs (9), said legs (9) being hinged to said base body (1), said legs (9) being at least three.

8. A disconnector malfunction switching device according to claim 7, characterized in that the first end of the snap joint (7) is clamped with the second end of the clamping rod (6), and the second end of the snap joint (7) is used for clamping the input end of the external disconnector manual operation mechanism.

9. The disconnecting switch fault switching device according to claim 8, wherein a first cuboid and a second cuboid extending along the axial direction of the disconnecting switch (7) are arranged at the second end of the disconnecting switch (7), the first cuboid is arranged above the second cuboid, the first cuboid and the second cuboid are arranged at intervals, and threaded holes penetrating through the upper surface and the lower surface are formed in the first cuboid and the second cuboid.

10. A disconnector malfunction switching device according to claim 9, characterized in that said leg (9) is provided with a weight (10), said weight (10) being provided near the end of said leg (9) which is grounded.

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