Electric trolley for loading disconnecting switch in direct-current switch cabinet

Abstract

The utility model discloses an electric trolley for loading an isolating switch in a direct-current switch cabinet, which is characterized in that a driving device is mounted on a trolley, a first synchronous pulley is mounted at the output end of the driving device, a screw rod is fixedly mounted on the trolley, a second synchronous pulley is mounted on the screw rod, and the first synchronous pulley and the second synchronous pulley are in transmission connection through a synchronous belt; one end of the lead screw extends out of the handcart and is fixedly provided with a hexagon nut; the chassis is arranged on the upper surface of the handcart and is in transmission connection with the screw rod through the fixing nut, and the screw rod drives the chassis to move through the fixing nut; the circuit breaker is installed on the chassis. By applying the electric trolley for loading the isolating switch in the direct-current switch cabinet, the driving device drives the synchronous belt to rotate so as to drive the lead screw to rotate to realize automatic control of the electric trolley, and the lead screw can also be driven to rotate through the hexagonal nut to realize manual control, so that the electric trolley has two control modes; the working intensity is reduced, and the control is simple and more accurate.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breaker trolleys and related fields, and in particular to an electric trolley for mounting disconnecting switches in a DC switch cabinet. Background Technology

[0002] Currently, circuit breaker trolleys can easily isolate and connect circuits. When maintenance or repair of the circuit is required, the trolley can be pulled out of the switchgear to disconnect the circuit and ensure safety. When power needs to be restored, the trolley can be pushed back into the switchgear to reconnect the circuit. However, with existing circuit breaker trolleys, the relative position between the circuit breaker and the trolley can only be adjusted manually, which is cumbersome and increases the workload of the operators. Utility Model Content

[0003] In view of this, in order to solve the above problems, the purpose of this utility model is to provide an electric trolley for loading disconnecting switches in a DC switch cabinet, wherein:

[0004] Handcart, circuit breaker, drive unit, timing belt, lead screw, fixing nut, chassis, hexagonal nut;

[0005] The drive device is mounted on the handcart, the output end of the drive device is equipped with a first synchronous pulley, the lead screw is fixedly mounted on the handcart, and a second synchronous pulley is mounted on the lead screw. The first synchronous pulley and the second synchronous pulley are connected by the synchronous belt drive.

[0006] One end of the lead screw extends out of the handcart and is fixedly installed with the hexagonal nut;

[0007] The chassis is mounted on the upper surface of the handcart, and the chassis is connected to the lead screw via a fixing nut. The lead screw drives the chassis to move via the fixing nut.

[0008] The circuit breaker is mounted on the chassis.

[0009] The electric trolley that loads a disconnecting switch in a DC switch cabinet, as described above, includes a drive device comprising a servo driver and a servo motor; both the servo driver and the servo motor are installed inside the trolley and are electrically connected; the first synchronous pulley is installed on the output shaft of the servo motor.

[0010] The electric trolley for loading disconnecting switches in a DC switchgear described above further includes: a plurality of guide structures; the plurality of guide structures are installed along a first direction on two opposite side walls of the trolley.

[0011] The electric trolley carrying a disconnecting switch in a DC switchgear described above further includes: a control resistor; the control resistor is installed inside the trolley and is electrically connected to the circuit breaker.

[0012] The electric trolley carrying a disconnecting switch in a DC switchgear described above further includes: a trolley detection cam; the trolley detection cam is mounted on the trolley.

[0013] The electric trolley for loading disconnecting switches in the aforementioned DC switch cabinet further includes: a panel fixing plate; the panel fixing plate is fixedly installed on the trolley along a second direction by a number of screws, and one end of the lead screw extends out of the panel fixing plate to install the hexagonal nut.

[0014] The electric trolley for loading disconnecting switches in a DC switchgear described above further includes: an emergency stop lever; the emergency stop lever is installed on the panel fixing plate, and the emergency stop lever passes through the panel fixing plate and is connected to the circuit breaker's tripping push rod.

[0015] The electric trolley for loading disconnecting switches in a DC switchgear described above further includes: an insulating rod; the insulating rod is installed on the trolley and is close to the panel fixing plate.

[0016] The electric trolley carrying a disconnecting switch in the aforementioned DC switchgear further includes: a grounding flexible connection; the grounding flexible connection is also connected between the circuit breaker and the trolley.

[0017] The electric trolley that loads a disconnecting switch in the aforementioned DC switchgear has two primary connectors on the circuit breaker, one of which has a horizontally arranged interface and the other has a vertically arranged interface.

[0018] The positive effects of the above technical solution compared with the existing technology are:

[0019] By applying this utility model, an electric trolley for loading disconnecting switches in a DC switch cabinet is provided. The drive device drives the synchronous belt to rotate, thereby driving the lead screw to rotate and realizing the automatic control of the device. It can also be manually controlled by driving the lead screw to rotate through the hexagonal nut. It has two control modes, which not only reduces the workload, but also makes the control simpler and more precise. Attached Figure Description

[0020] Figure 1 This is a front view of an electric trolley that carries a disconnecting switch in a DC switch cabinet according to the present invention.

[0021] Figure 2This is a right view of an electric trolley that carries a disconnecting switch in a DC switch cabinet according to this utility model.

[0022] Figure 3 This is a left view of an electric trolley that carries a disconnecting switch in a DC switch cabinet according to this utility model.

[0023] Figure 4 for Figure 2 A cross-sectional view along the AA direction.

[0024] Figure 5 This is a top view of an electric trolley that carries a disconnecting switch in a DC switch cabinet according to this utility model.

[0025] 1. Handcart; 2. Circuit breaker; 3. Synchronous belt; 4. First synchronous belt pulley; 5. Chassis; 6. Fixing nut; 7. Hex nut; 8. Servo motor; 9. Servo driver; 10. Guide structure; 11. Control resistor; 12. Handcart detection cam; 13. Panel fixing plate; 14. Emergency stop lever; 15. Insulating rod; 16. Grounding flexible connection; 17. Primary connector; 18. Lead screw; 19. Insulated movable door roller; 20. Core connector; 21. Working position indicator sign. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0027] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0028] like Figures 1 to 5 As shown, an electric trolley carrying a disconnecting switch in a DC switch cabinet according to a preferred embodiment is illustrated, which includes: a trolley 1, a circuit breaker 2, a drive unit, a synchronous belt 3, a lead screw 18, a fixing nut 6, a chassis 5, and a hexagonal nut 7.

[0029] The drive unit is installed on the handcart 1, and the output end of the drive unit is equipped with the first synchronous pulley 4. The lead screw 18 is fixedly installed on the handcart 1, and the second synchronous pulley is installed on the lead screw 18. The first synchronous pulley 4 and the second synchronous pulley are connected by a synchronous belt 3. One end of the lead screw 18 extends out of the handcart 1 and is fixedly installed with a hexagonal nut 7. The chassis 5 is set on the upper surface of the handcart 1, and the chassis 5 is connected to the lead screw 18 by a fixing nut 6. The lead screw 18 drives the chassis 5 to move through the fixing nut 6. The circuit breaker 2 is installed on the chassis 5.

[0030] In practical use, this device has two control methods: manual control and automatic control. In automatic control: the drive unit starts, and drives the synchronous belt 3 to rotate via the first synchronous pulley 4. The synchronous belt 3 drives the lead screw 18 to rotate via the second synchronous pulley. The rotation of the lead screw 18 drives the chassis 5 to move via the fixing nut 6, thereby moving the circuit breaker 2 on the chassis 5 relative to the handcart 1. In manual control: the handle is inserted into the hexagonal nut 7, and the handle is cranked. The hexagonal nut 7 drives the lead screw 18 to rotate. The rotation of the lead screw 18 moves the fixing nut 6 along the axial direction of the lead screw 18, thereby moving the circuit breaker 2.

[0031] Specifically, the circuit breaker 2 can be fixedly installed on the chassis 5 by screws, etc., and the handcart 1 is also equipped with insulated movable door rollers 19 for guiding the switch cabinet door, core connectors 20 for electrical connection, and a working position indicator sign indicating the current position of the handcart 1.

[0032] Based on the above, this utility model also has the following embodiments:

[0033] Furthermore, an electric trolley for mounting a disconnecting switch in a DC switchgear includes a drive unit comprising a servo driver 9 and a servo motor 8. Both the servo driver 9 and the servo motor 8 are installed inside the trolley 1 and are electrically connected. A first synchronous pulley 4 is mounted on the output shaft of the servo motor 8. Specifically, the servo driver 9 outputs a signal to the servo motor 8, driving the output shaft of the motor 8 to rotate, which in turn drives the first synchronous pulley 4 to rotate.

[0034] Furthermore, an electric trolley for loading disconnecting switches in a DC switchgear further includes: a plurality of guide structures 10; the plurality of guide structures 10 are installed on two opposite side walls of the trolley 1 along a first direction. Specifically, the first direction is the length direction of the trolley 1, which is the same as the movement direction of the circuit breaker 2 and also the movement direction of the trolley 1, so that when the trolley 1 moves into the switchgear, the guide structures 10 can be rolled, allowing the trolley 1 to slide inward along the inner wall of the switchgear via the guide structures 10.

[0035] Furthermore, an electric trolley for mounting a disconnecting switch in a DC switchgear also includes: a control resistor 11; the control resistor 11 is installed inside the trolley 1 and is electrically connected to the circuit breaker 2. The control resistor 11 serves to prevent circuit overload.

[0036] Furthermore, an electric trolley for mounting a disconnecting switch in a DC switchgear further includes: a trolley detection cam 12; the trolley detection cam 12 is mounted on the trolley 1. Specifically, the trolley detection cam 12 can be connected to a detection device inside the switchgear to detect the insertion depth of the trolley 1 into the switchgear.

[0037] Furthermore, an electric trolley for mounting a disconnecting switch in a DC switchgear further includes: a panel fixing plate 13; the panel fixing plate 13 is fixedly mounted to the trolley 1 along a second direction by several screws, and one end of a lead screw 18 extends out of the panel fixing plate 13 to install a hexagonal nut 7. Specifically, the second direction is the width direction of the trolley, that is, the direction perpendicular to the first direction, and the distance between the panel fixing plate 13 and the trolley is the range within which the circuit breaker 2 can move, i.e. Figure 4 The range shown in A is as follows.

[0038] Furthermore, an electric trolley for loading disconnecting switches in a DC switchgear further includes: an emergency stop lever 14; the emergency stop lever 14 is mounted on a panel fixing plate 13, and passes through the panel fixing plate 13 to connect with the tripping push rod of the circuit breaker 2. The emergency stop lever 14 is connected to the tripping push rod via a mechanical linkage device. When the emergency stop lever 14 is pulled, it triggers the tripping push rod, thereby causing the circuit breaker 2 to perform an emergency tripping operation.

[0039] Furthermore, an electric trolley for loading disconnecting switches in a DC switchgear further includes an insulating rod 15; the insulating rod 15 is installed on the trolley 1 and is close to the panel fixing plate 13. Specifically, workers can push the trolley 1 into the switchgear using the insulating rod 15.

[0040] Furthermore, an electric trolley carrying a disconnecting switch in a DC switchgear also includes: a grounding flexible connection 16; a grounding flexible connection 16 is also connected between the circuit breaker 2 and the trolley 1. Specifically, the circuit breaker is grounded through the grounding flexible connection 16.

[0041] Furthermore, an electric trolley carrying a disconnecting switch in a DC switchgear includes two primary connectors 17 on the circuit breaker 2. One primary connector 17 has its interface arranged horizontally, while the other primary connector 17 has its interface arranged vertically. Specifically, the primary connectors 17 ensure the electrical connection of the trolley 1.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric trolley for mounting a disconnecting switch in a DC switchgear, characterized in that, include: Handcart, circuit breaker, drive unit, timing belt, lead screw, fixing nut, chassis, hexagonal nut; The drive device is mounted on the handcart, the output end of the drive device is equipped with a first synchronous pulley, the lead screw is fixedly mounted on the handcart, and a second synchronous pulley is mounted on the lead screw. The first synchronous pulley and the second synchronous pulley are connected by the synchronous belt drive. One end of the lead screw extends out of the handcart and is fixedly installed with the hexagonal nut; The chassis is mounted on the upper surface of the handcart, and the chassis is connected to the lead screw via the fixing nut. The lead screw drives the chassis to move via the fixing nut. The circuit breaker is mounted on the chassis.

2. The electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 1, characterized in that, The drive device includes a servo driver and a servo motor; both the servo driver and the servo motor are installed inside the handcart, the servo driver and the servo motor are electrically connected, and the first synchronous pulley is installed on the output shaft of the servo motor.

3. The electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 1, characterized in that, Also includes: A plurality of guide structures; the plurality of the guide structures are mounted along a first direction on two opposite side walls of the handcart.

4. The electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 1, characterized in that, Also includes: A control resistor is installed inside the handcart and is electrically connected to the circuit breaker.

5. An electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 1, characterized in that, Also includes: Handcart detection cam; the handcart detection cam is installed on the handcart.

6. An electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 1, characterized in that, Also includes: A panel fixing plate; the panel fixing plate is fixedly installed on the handcart along a second direction by a number of screws, and one end of the lead screw extends out of the panel fixing plate to install the hexagonal nut.

7. An electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 6, characterized in that, Also includes: Emergency stop lever; The emergency stop lever is installed on the panel fixing plate, and the emergency stop lever passes through the panel fixing plate and is connected to the circuit breaker's tripping push rod.

8. An electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 6, characterized in that, Also includes: Insulating rod; The insulating rod is installed on the handcart, and the insulating rod is close to the panel fixing plate.

9. An electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 1, characterized in that, Also includes: A flexible grounding connection is also provided between the circuit breaker and the handcart.

10. An electric trolley for mounting a disconnecting switch in a DC switchgear according to claim 1, characterized in that, The circuit breaker is provided with two primary connectors, one of which has a horizontally arranged interface and the other has a vertically arranged interface.

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