A device for preventing live grounding switch from being mistakenly closed

Abstract

The present invention proposes a device for preventing the grounding knife switch from being mistakenly closed when energized, comprising a base, a driving assembly, a transmission assembly, and a baffle, wherein the base comprises a bottom plate and side plates arranged on two opposite sides of the bottom plate, the length of one side plate is greater than that of the other side plate, and an operation hole is opened on one side plate and at a position extending out of the other side plate; the driving assembly is arranged on the other side plate, the input end of the driving assembly is connected to the output end of the bus voltage transformer of the switch cabinet to be installed, and the output end of the driving assembly is connected to the driving end of the transmission assembly; one end of the transmission assembly is fixedly arranged on the bottom plate, and the other end of the transmission assembly is connected to the baffle; when the driving assembly is in a non-energized state, the baffle is arranged on a side of the operation hole close to the bottom plate; when the driving assembly is in a energized state, the transmission assembly moves and makes the baffle cover the operation hole, thereby preventing the grounding knife switch from being mistakenly closed when the switch cabinet is energized, resulting in the live grounding of the cable at the lower end of the switch cabinet.

Description

Technical Field

[0001] The invention relates to the field of auxiliary devices for electric power equipment, and more specifically to a device for preventing an earthing switch from being mistakenly closed while energized. Background Art

[0002] At present, the medium-voltage load switch cabinets or medium-voltage circuit breaker switch cabinets used in 10kV distribution networks are equipped with mechanical interlocks to prevent misoperation. The grounding knife can only be closed after the switch is disconnected, and the load switch can only be closed after the grounding knife is disconnected. However, most of the 10kV distribution network lines are currently powered by ring networks. During the ring closing operation, when the switch is in the open position, the switch operation hole and the ground knife operation hole will be opened. At this time, both the switch closing operation and the grounding knife closing operation can be performed. Therefore, during the operation of the ring network line, it is easy to cause the hidden danger of the cable at the lower end of the switch being live and grounded due to the mistaken closing of the grounding knife, especially when the operation holes of some switch cabinets are close to each other, and the grounding knife is closed due to the wrong judgment of the operation hole during the closing operation. Summary of the invention

[0003] The present invention provides a device for preventing the live grounding knife switch from being mistakenly closed in order to overcome the defect of the prior art that the cable at the lower end of the switch cabinet is easily grounded due to erroneous operation.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A device for preventing the grounding switch from being mistakenly closed when powered on comprises a base, a driving assembly, a transmission assembly and a baffle, wherein the base comprises a bottom plate and side plates arranged on two opposite sides of the bottom plate, the length of one side plate is greater than that of the other side plate, and an operation hole is provided on one side plate and at a position extending out from the other side plate; the driving assembly is arranged on the other side plate, the input end of the driving assembly is connected to the output end of the bus voltage transformer of the switch cabinet to be installed, and the output end of the driving assembly is connected to the driving end of the transmission assembly; one end of the transmission assembly is fixedly arranged on the bottom plate, and the other end of the transmission assembly is connected to the baffle; when the driving assembly is in a non-powered state, the baffle is arranged on the side of the operation hole close to the bottom plate; when the driving assembly is in a powered state, the transmission assembly moves and causes the baffle to cover the operation hole.

[0006] In the present technical scheme, a side panel with an operating hole on the base is installed to match the earthing knife switch of the switch cabinet to be installed, and the driving component is connected to the output end of the bus voltage transformer of the switch cabinet to be installed. When the bus of the switch cabinet is energized, the voltage transformer sends an electrical signal to the driving component, the driving component is turned on and starts to drive the transmission component to operate, and the transmission component pushes the baffle, and the baffle moves from the side of the operating hole close to the bottom plate to the covering setting on the operating hole under the pushing action of the transmission component, so as to close the operating hole when the bus of the switch cabinet is energized, thereby avoiding the operator's erroneous operation of inserting the earthing knife hole and causing the earthing knife to be energized.

[0007] Preferably, the drive component includes a first relay and a motor, wherein the first relay is connected to the bus voltage transformer of the switch cabinet to be installed, the normally open node of the first relay is connected in series with the motor, and the output end of the motor is connected to the drive end of the transmission component as the output end of the drive component.

[0008] Preferably, the transmission assembly includes a transmission rod or an electric push rod.

[0009] Preferably, the driving assembly includes an electromagnet, and the transmission assembly includes a spring rod; the electromagnet is arranged on the other side plate at one end away from the bottom plate; one end of the spring rod is provided with a spring and is fixedly arranged on the bottom plate, the other end of the spring rod is connected to the baffle, and a strong magnet is arranged at the other end of the spring rod.

[0010] Preferably, the baffle is an L-shaped baffle, and the baffle is arranged in close contact with one side plate.

[0011] Preferably, door hinges for fixing the base to the outside of the operating hole of the grounding switch of the switch cabinet are arranged on both sides of the base.

[0012] Preferably, a cover plate for opening the base is provided on the other side plate to facilitate inspection and maintenance of the drive assembly.

[0013] Preferably, a limiting structure is provided in the middle of one side plate to limit the baffle plate and restrict the position of the baffle plate moving toward the bottom plate.

[0014] Preferably, the device further comprises a second relay and an alarm module, the second relay is connected to the bus voltage transformer of the switch cabinet to be installed, and the normally open node of the second relay is connected in series with the alarm module.

[0015] Preferably, the alarm module includes an audible and visual alarm or a buzzer.

[0016] Compared with the prior art, the beneficial effect of the technical solution of the present invention is: by combining with the bus voltage transformer of the target switch cabinet, when the voltage transformer senses a voltage signal, it sends an electrical signal to the drive component to make it conductive and work, and the drive component drives the transmission component to move, so that the baffle connected to it moves to completely cover the operating hole, thereby avoiding the accidental closing of the grounding switch when the cable side at the lower end of the switch cabinet is energized, resulting in the live grounding of the cable at the lower end of the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a device for preventing accidental closing of a live grounding switch according to Example 1.

[0018] Figure 2 Schematic diagram of the conducting state of the device for preventing the earthing switch from being mistakenly closed when live in Example 1.

[0019] Figure 3 This is a schematic diagram of the structure of a device for preventing accidental closing of a live grounding switch according to Example 2.

[0020] Figure 4 Schematic diagram of the conducting state of the device for preventing accidental closing of the grounding switch under power on in Example 2. DETAILED DESCRIPTION

[0021] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0022] In order to better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0023] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1

[0026] This embodiment provides a device for preventing the grounding switch from being mistakenly closed while the power is on. Figure 1 The figure is a schematic diagram of the structure of the device for preventing the grounding switch from being mistakenly closed while powered on according to the present embodiment.

[0027] The device for preventing the grounding switch from being mistakenly closed when live proposed in this embodiment includes a base 1, a drive assembly 2, a transmission assembly 3, and a baffle 4, wherein the base 1 includes a bottom plate 11 and side plates arranged on two opposite sides of the bottom plate, the length of one side plate 12 is greater than that of the other side plate 14, and an operating hole 13 is opened on one side plate 12 and at a position extending out from the other side plate 14; the drive assembly 2 is arranged on the other side plate 14.

[0028] In this embodiment, the drive component 2 includes a first relay and a motor, wherein the first relay is connected to the bus voltage transformer of the switch cabinet to be installed, the normally open node of the first relay is connected in series with the motor, and the output end of the motor is connected to the drive end of the transmission component 3 as the output end of the drive component 2; the transmission component 3 adopts an electric push rod, one end of the electric push rod is fixedly set on the base plate 11, and the other end of the electric push rod is connected to the baffle 4.

[0029] In this embodiment, the baffle plate 4 is an L-shaped structure baffle plate, and the baffle plate 4 is arranged in close contact with a side plate 12 .

[0030] In this embodiment, door hinges 15 are provided on both sides of the base 1, and a cover plate for opening the base is provided on the other side plate 14 to facilitate the inspection and maintenance of the drive assembly 2; a limiting structure 16 is provided in the middle of one side plate 12 to limit the baffle 4 and limit the position of the baffle 4 moving toward the bottom plate 11.

[0031] In the specific implementation process, the base 1 is fixedly set on the periphery of the target switch cabinet grounding knife switch operating hole through the door hinges 15 on both sides of the base 1, and the operating hole 13 opened on the side plate 12 in the base 1 is installed and matched with the target switch cabinet grounding knife switch operating hole, the first relay in the drive component 2 is connected to the bus voltage transformer of the target switch cabinet, and the motor is connected to the external power supply, and the installation of the anti-electric grounding knife switch device of this embodiment is completed. When the target switch cabinet cable is not energized, that is, when the drive component 2 is in a non-conductive state, the transmission component 3 is connected to the baffle 4, and the baffle 4 is set on the side of the operating hole 13 close to the bottom plate 11, and the operating hole 13 is in an open state. At this time, the grounding knife switch can be opened and closed according to normal operating specifications. When the target switch cabinet cable is energized, the drive component 2 is turned on and works. Specifically, the bus voltage transformer of the target switch cabinet sends an electrical signal to the first relay, the first relay is turned on, the normally open node of the first relay is closed, the motor is turned on and works, the motor starts and controls the transmission component 3 to operate, and the electric push rod extends under the driving action of the motor. The baffle 4 connected to the electric push rod moves toward the operating hole 13 until it completely covers the operating hole 13. The operating hole 13 is in a closed state. At this time, the grounding switch is inoperable, so that the grounding switch cannot be opened and operated when the switch cabinet is energized, thereby avoiding accidental closing of the grounding switch when the cable side at the lower end of the switch cabinet is energized.

[0032] like Figure 2 As shown, it is a schematic diagram of the conducting state of the device for preventing accidental closing of the grounding switch under power in this embodiment.

[0033] When the operation and maintenance personnel need to inspect and repair the drive assembly or the transmission assembly, they only need to open the lock set on the cover and open the cover. There is no need to remove the anti-misclosing grounding switch device when live, which can effectively improve the work efficiency of the operation and maintenance personnel.

[0034] In this embodiment, by combining with the bus voltage transformer of the target switch cabinet, when the voltage transformer senses a voltage signal, it sends an electrical signal to the drive component 2 to make it conductive and work, and the drive component 2 drives the transmission component 3 to move, so that the baffle 4 connected thereto moves to completely cover the operating hole 13, thereby avoiding the grounding switch being mistakenly closed when the switch cabinet is energized, resulting in the cable on the cable side of the lower end of the switch cabinet being energized and grounded.

[0035] Example 2

[0036] This embodiment provides a device for preventing the grounding switch from being mistakenly closed while the power is on. Figure 3 The figure is a schematic diagram of the structure of the device for preventing the grounding switch from being mistakenly closed while powered on according to the present embodiment.

[0037] The device for preventing the grounding switch from being mistakenly closed when live proposed in this embodiment includes a base 1, a drive assembly 2, a transmission assembly 3, and a baffle 4, wherein the base 1 includes a bottom plate 11 and side plates arranged on two opposite sides of the bottom plate, the length of one side plate 12 is greater than that of the other side plate 14, and an operating hole 13 is opened on one side plate 12 and at a position extending out from the other side plate 14; the drive assembly 2 is arranged on the other side plate 14.

[0038] In this embodiment, the driving component 2 includes an electromagnet, and the transmission component 3 includes a spring rod; the electromagnet is arranged on the other side plate 14 and on the side of the operating hole 13 close to the bottom plate 11; one end of the spring rod is provided with a spring and is fixedly arranged on the bottom plate 11, and the other end of the spring rod is connected to the baffle 4, and a strong magnet 31 is arranged at the other end of the spring rod.

[0039] In this embodiment, the baffle 4 is an L-shaped baffle, which is fitted with a side plate 12 . A limiting structure 16 is provided in the middle of the side plate 12 to limit the baffle 4 and restrict the position of the baffle 4 moving toward the bottom plate 11 .

[0040] In this embodiment, door hinges 15 are provided on both sides of the base 1 , and a cover plate for opening the base is provided on the other side plate 14 , so as to facilitate the inspection and maintenance of the drive assembly 2 .

[0041] In this embodiment, the device further includes a second relay and an alarm module 5, the second relay is connected to the bus voltage transformer of the switch cabinet to be installed, the normally open node of the second relay is connected in series with the alarm module 5, and the alarm module 5 uses a buzzer.

[0042] In the specific implementation process, the base 1 is fixedly set on the periphery of the target switch cabinet grounding knife switch operating hole through the door hinges 15 set on both sides of the base 1, and the operating hole 13 opened on the side plate 12 in the base 1 is installed and matched with the target switch cabinet grounding knife switch operating hole, and the electromagnet in the drive component 2 is connected to the bus voltage transformer of the target switch cabinet, and the installation of the anti-electric grounding knife switch device of this embodiment is completed. When the target switch cabinet cable is not energized, that is, when the drive component 2 is in a non-conductive state, the transmission component 3 is connected to the baffle 4, and the baffle 4 is set on the side of the operating hole 13 close to the bottom plate 11, and the operating hole 13 is in an open state. At this time, the grounding knife switch can be opened and closed according to normal operating specifications. When the target switch cabinet cable is energized, the drive assembly 2 is turned on and works. Specifically, the electromagnet is energized and produces a magnetic attraction effect. The electromagnet attracts the strong magnet 31 arranged at the other end of the spring rod. The spring rod extends under the adsorption action of the electromagnet and moves the baffle 4 toward the operating hole 13 until the baffle 4 completely covers the operating hole 13. The operating hole 13 is in a closed state. At this time, the grounding switch cannot be operated, so that the grounding switch cannot be opened when the switch cabinet is energized, thereby avoiding the accidental closing of the grounding switch when the cable side at the lower end of the switch cabinet is energized.

[0043] like Figure 4 As shown, it is a schematic diagram of the conducting state of the device for preventing accidental closing of the grounding switch under power in this embodiment.

[0044] In addition, when the cable of the target switch cabinet is energized, the bus voltage transformer of the target switch cabinet sends an electrical signal to the second relay, the second relay is turned on and works, the normally open node of the second relay is closed, the alarm module 5 is turned on and works, the buzzer works and emits an alarm buzzer to warn the operator that the cable of the current target switch cabinet is energized.

[0045] The same or similar reference numerals correspond to the same or similar components;

[0046] The terms used in the drawings to describe positional relationships are only used for illustrative purposes and should not be construed as limiting this patent;

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A device for preventing accidental closing of a live grounding switch, characterized in that: The invention comprises a base, a driving assembly, a transmission assembly and a baffle, wherein the base comprises a bottom plate and side plates arranged on two opposite sides of the bottom plate, the length of the side plate is greater than that of the other side plate, and an operation hole is provided on the side plate and at a position extending from the other side plate; the driving assembly is arranged on the other side plate, the input end of the driving assembly is connected to the output end of the bus voltage transformer of the switch cabinet to be installed, and the output end of the driving assembly is connected to the driving end of the transmission assembly; one end of the transmission assembly is fixedly arranged on the bottom plate, and the other end of the transmission assembly is connected to the baffle; when the driving assembly is in a non-energized state, the baffle is arranged on a side of the operation hole close to the bottom plate; when the driving assembly is in a energized state, the transmission assembly operates and causes the baffle to cover the operation hole; The drive assembly includes a first relay and a motor, wherein the first relay is connected to a bus voltage transformer of a switch cabinet to be installed, a normally open node of the first relay is connected in series with the motor, and an output end of the motor is connected to a drive end of the transmission assembly as an output end of the drive assembly; The device fixes the base on the periphery of the grounding switch operating hole of the target switch cabinet through door hinges on both sides of the base, and the operating hole opened on a side plate of the base is installed to match the grounding switch operating hole of the target switch cabinet, connects the first relay in the drive assembly to the bus voltage transformer of the target switch cabinet, and connects the motor to the external power supply; When the driving assembly is in a non-energized state, the transmission assembly is connected to the baffle, and the baffle is arranged on the side of the operating hole close to the bottom plate, and the operating hole is in an open state. At this time, the grounding knife switch can be opened and closed according to normal operating specifications; When the driving component is energized, the first relay is turned on, the normally open node of the first relay is closed, the motor is turned on and works, the motor starts and controls the operation of the transmission component, the electric push rod extends under the drive of the motor, and the baffle connected to the electric push rod moves toward the operating hole until it completely covers the operating hole. The operating hole is in a closed state, and the grounding switch cannot be operated at this time.

2. The device for preventing accidental closing of a live grounding switch according to claim 1 is characterized in that: The transmission assembly includes a transmission rod or an electric push rod.

3. The device for preventing live grounding switch from being mistakenly closed according to claim 1 is characterized in that: The driving assembly includes an electromagnet, and the transmission assembly includes a spring rod; the electromagnet is arranged on one end of the other side plate away from the bottom plate; one end of the spring rod is provided with a spring and is fixedly arranged on the bottom plate, and the other end of the spring rod is connected to the baffle, and a strong magnet is arranged on the other end of the spring rod.

4. The device for preventing live grounding switch from being mistakenly closed according to any one of claims 1 to 3, characterized in that: The baffle is an L-shaped baffle.

5. The device for preventing the grounding switch from being mistakenly closed when live according to claim 4 is characterized in that: Door hinges are arranged on both sides of the base.

6. The device for preventing the grounding switch from being mistakenly closed when live according to claim 5 is characterized in that: The other side plate is provided with a cover plate.

7. The device for preventing the grounding switch from being mistakenly closed when live as claimed in claim 4 is characterized in that: A limiting structure is arranged in the middle of the one side plate.

8. The device for preventing live grounding switch from being mistakenly closed according to claim 4 is characterized in that: The device also includes a second relay and an alarm module, wherein the second relay is connected to a bus voltage transformer of a switch cabinet to be installed, and a normally open node of the second relay is connected in series with the alarm module.

9. The device for preventing accidental closing of grounding switch under power-on condition according to claim 8 is characterized in that: The alarm module includes an audible and visual alarm or a buzzer.

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