A split-type maintenance grounding device for a center-mounted switch cabinet

Abstract

The present invention discloses a split type maintenance grounding device for a center-mounted switch cabinet, including a vehicle body, an operating part and a grounding part. The operating part is arranged on the vehicle body, and the grounding part is arranged on a trolley track arranged on the center-mounted switch cabinet. The operating part is movably connected with the grounding part. The present invention sets the grounding device as a split type, namely a grounding part and an operating installation part. After the grounding part is installed, it is retained on the fixed contact of the conductor to ensure reliable grounding of the maintenance equipment. The vehicle frame and the switch cabinet are fixed with an electromagnet to replace the existing vehicle frame with multiple-shaped hooks. The electromagnet fixed grounding wire clamp can separate the grounding device from the operating frame, so that the bulky grounding trolley becomes a very light grounding connection device. The electrometer arranged at the front end of the insulated support rod of the crank arm can change the original indirect electrical testing into direct electrical testing, which is more in line with the requirements of the regulations.

Description

Technical Field

[0001] The invention relates to a maintenance grounding device for an electrical cabinet, in particular to a maintenance grounding device for a center-mounted switch cabinet. Background Art

[0002] With the continuous updating and application of substation equipment in the power system, indoor 10kV (20kV) center-mounted switchgear has been widely used in substations of power systems. Since the center-mounted switchgear is a complete set of closed type, ordinary wiring cannot be used in the switchgear. Except for the special grounding knife switch on the outgoing line side, the grounding trolley provided by the manufacturer is used when the busbar, the low-voltage side of the main transformer (10kV, 20kV) switchgear and other maintenance need to be grounded. Although the application of the grounding trolley solves the grounding problem of the maintenance equipment, there are also great problems in actual use, such as the weight is too large (about 150-200kg), and the operators (usually two people) cannot lift the grounding trolley to the trolley frame, and can only wait until the maintenance personnel arrive at the site to help. This violates the provisions of the operating specifications that one person operates and one person supervises, and also delays the operation time. At the same time, it will also cause harm to personnel during use. Second, the grounding trolley is not universal. There is a grounding trolley of one model, and the configuration occupies more space. When using it, you need to find the corresponding one. Summary of the invention

[0003] The object of the present invention is to provide a maintenance grounding device for a center-mounted switch cabinet, which can be commonly used in all center-mounted switch cabinets, and the overall volume of the grounding device is small and easy to carry.

[0004] The present invention is implemented by the following technical means: a split-type maintenance grounding device for a center-mounted switch cabinet, comprising a vehicle body, an operating part and a grounding part, wherein the operating part is arranged on the vehicle body, the grounding part is arranged on a handcart track arranged on the center-mounted switch cabinet, and the operating part is movably connected to the grounding part;

[0005] The grounding part includes a plum blossom contact wire clamp, a grounding plate and a grounding connection wire, and the plum blossom contact wire clamp is connected to the grounding plate through the grounding connection wire;

[0006] The operating part includes an operating vehicle, a grounding plate hook, a grounding plate hook wire drawing and an operating handle. The operating vehicle is provided with moving wheels at the four corners of the ground surface. The grounding plate hook is movably connected to the front end of the operating vehicle. The operating handle is provided at the rear end of the operating vehicle. A grounding plate hook wire drawing is provided between the operating handle and the grounding plate hook. A card slot cooperating with the grounding plate hook is provided at the rear end of the grounding plate.

[0007] The vehicle body includes a frame, which is an L-shaped structure. Moving wheels are arranged on the horizontal side of the frame, a support plate is arranged on the vertical side of the frame, an operating part is arranged on the support plate, a track plate is vertically arranged at the rear of the operating vehicle, three crank arms are slidably arranged in the track plate, and the free ends of the crank arms are connected to the rear of the insulating part of the plum blossom contact clamp. The moving wheels are divided into walking wheels arranged on the front side of the frame and universal wheels arranged on the rear side of the operating vehicle, and a locking device is arranged on the universal wheel.

[0008] The plum blossom contact wire clamp comprises a support body, a petal-shaped contact piece, and a tension spring. The support body comprises a petal-shaped contact piece support ring and a petal-shaped contact piece mounting ring arranged relatively in parallel. A contact support connecting rod is arranged between the petal-shaped contact piece support ring and the petal-shaped contact piece mounting ring. The tail of the petal-shaped contact piece is rotatably connected to the petal-shaped contact piece mounting ring. The front part of the petal-shaped contact piece is clamped on the petal-shaped contact piece support ring. The plum blossom contact wire clamp comprises a support body, a petal-shaped contact piece, and a tightening spring. The support body comprises a petal-shaped contact piece support ring and a petal-shaped contact piece mounting ring arranged relatively in parallel. A petal-shaped contact support ring and a petal-shaped contact mounting ring are arranged, a contact support connecting rod is arranged between the petal-shaped contact support ring and the petal-shaped contact mounting ring, the tail of the petal-shaped contact is rotatably connected to the petal-shaped contact mounting ring, the front part of the petal-shaped contact is clamped on the petal-shaped contact support ring, the tightening spring is a tension spring connected end to end, the tension spring is sleeved on the outside of the petal-shaped contact to ensure that the petal-shaped contact is always tightened inward, and a fixing groove for the tightening spring to be clamped into is arranged at the position where the petal-shaped contact contacts with the tightening spring.

[0009] The contact support connecting rods are provided with three, and two petal-shaped contact pieces are evenly arranged in the space defined by every two contact support connecting rods.

[0010] The grounding connection line is fixedly connected to the petal-shaped contact piece installation ring and also includes a suction column. The petal-shaped contact piece installation ring is sleeved on the suction column, and the suction column is in contact with the free end of the crank arm.

[0011] The suction column is made of insulating material, a metal sheet is arranged at a position of the suction column away from the petal-shaped contact piece, and an electromagnet is arranged at a corresponding position of the free end of the crank arm.

[0012] A hook operating arm is arranged on the top of the grounding plate hook, and the hook operating arm connects the top of the grounding plate hook. The grounding plate hook is connected to the hook operating arm by a wire drawing, and a compression spring is arranged on the hook operating arm to maintain its initial position.

[0013] A lifting device is also provided on the vehicle frame, the action end of the lifting device is fixedly connected to the bottom of the support plate, and an auxiliary lifting rod for maintaining the lifting posture of the support plate is also provided on the vehicle frame;

[0014] The auxiliary lifting rod comprises a vertical channel steel fixedly arranged on the frame, an H-shaped support, and a fixed pulley device, wherein the vertical channel steel is fixedly arranged on the frame, the bottom of the H-shaped support extends into the vertical channel steel and can slide freely therein, the fixed pulley device is arranged at the bottom of the H-shaped support, the fixed pulley device comprises a pulley support plate and a pulley, the pulley is arranged on two surfaces of the pulley support plate, the size of the fixed pulley device is equal to the size of the bottom of the H-shaped support, and the vertical side of the H-shaped support is fixedly connected to the support plate through an angle steel;

[0015] The lifting device is a jack, which is arranged at the bottom of the frame, and a center piece is arranged on the supporting plate, and a top rod of the jack is in contact with the center piece.

[0016] It also includes a width adjustment device, which includes a handle and forward and reverse bolts. The forward and reverse bolts pass through the crank arm in sequence. The crank arm is provided with threads that match the forward and reverse bolts. A handle is provided on one side of the forward and reverse bolts. The frame is also provided with bearings for receiving the forward and reverse bolts. When the forward and reverse bolts rotate, the crank arm moves closer or farther away accordingly.

[0017] A forward and backward device is also arranged on the frame, and the forward and backward device comprises a handle and a bolt. The handle is connected to one end of the bolt, and the bolt vertically passes through the vertical channel steel, and a thread matching with the bolt is arranged on the vertical channel steel.

[0018] The present invention sets the grounding device as a split type, namely the grounding part and the operating installation part. After the grounding part is installed, it is left on the fixed contact of the conductor to ensure reliable grounding of the maintenance equipment. The frame and the switch cabinet are fixed with an electromagnet to replace the existing frame. The electromagnet fixed grounding wire clamp can separate the grounding device from the operating frame, so that the bulky grounding trolley becomes a very light grounding connection device. The electrometer set at the front end of the insulated support rod of the crank arm can change the original operation of only indirect electricity testing into direct electricity testing, which is more in line with the requirements of the regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the grounding structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the frame structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the plum blossom contact structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the support structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the petal-shaped contact structure of the present invention.

[0025] Among them, 1- plum blossom contact wire clamp, 2- grounding plate, 3- grounding connection wire, 4- operating vehicle, 5- grounding plate hook, 6- grounding plate hook wire drawing, 7- operating handle, 8- slot, 9- frame, 10- support plate, 11- track plate, 12- crank arm, 13- electromagnet, 14- hook operation crank arm, 15- jack, 16- adjustment handle, 17- forward and backward handle, 18- electric test device, 19- insulating support rod, 20 compression spring, 21- magnet switch, 22- frame fixing electromagnet, 23 battery, 24- grounding contact;

[0026] 1-1-1 petal-shaped contact piece supporting ring, 1-1-2 petal-shaped contact piece mounting ring, 1-2 petal-shaped contact piece, 1-3 tightening spring, 1-4 fixing groove, 1-5 suction column, 15-1 chain, 15-2 rotating gear. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0028] The present invention relates to a split-type maintenance grounding device for a center-mounted switch cabinet, which comprises a vehicle body, an operating part and a grounding part, wherein the operating part is arranged on the vehicle body, the grounding part is arranged on a handcart track arranged on the center-mounted switch cabinet, and the operating part is movably connected to the grounding part;

[0029] The grounding part includes a plum blossom contact wire clamp 1, a grounding plate 2 and a grounding connection line 3. The plum blossom contact wire clamp 1 is connected to the grounding plate 2 through the grounding connection line 3. When in use, the grounding plate 2 presses against a spring-loaded and protruding grounding connection point inherent in the switch cabinet.

[0030] The operating part includes an operating vehicle 4, a grounding plate hook 5, a grounding plate hook wire drawing 6 and an operating handle 7. The operating vehicle 4 is provided with moving wheels at the four corners of the ground. The grounding plate hook 5 is movably connected to the front end of the operating vehicle 4. The operating handle 7 is provided at the rear end of the operating vehicle 4. A grounding plate hook wire drawing 6 is provided between the operating handle 7 and the grounding plate hook 5. A card slot 8 cooperating with the grounding plate hook 5 is provided at the rear end of the grounding plate 2.

[0031] The vehicle body includes a frame 9, which is an L-shaped structure. Moving wheels are arranged on the horizontal side of the frame 9, a support plate 10 is arranged on the vertical side of the frame, an operating part is arranged on the support plate 10, and a track plate 11 is vertically arranged at the rear of the operating vehicle. Three crank arms 12 are slidably arranged in the track plate 11, and the free ends of the crank arms 12 are connected to the bottom of the plum blossom contact clamp 1.

[0032] The plum blossom contact clamp 1 includes a support body, a petal-shaped contact piece 1-2, and a tightening spring 1-3. The support body includes a petal-shaped contact piece support ring 1-1-1 and a petal-shaped contact piece mounting ring 1-1-2 arranged relatively parallel to each other. A contact support connecting rod 1-1-3 is arranged between the petal-shaped contact piece support ring 1-1-1 and the petal-shaped contact piece mounting ring 1-1-2. The tail of the petal-shaped contact piece 1-2 is rotatably connected to the petal-shaped contact piece mounting ring 1-1-2. The front part of the contact piece 1-2 is clamped on the petal-shaped contact piece support ring 1-1-1, and the petal-shaped contact piece 1-2 is fixed in position by a tightening spring 1-3. Furthermore, the tightening spring 1-3 is a tension spring connected end to end. The tension spring is sleeved on the outside of the petal-shaped contact piece 1-2 to ensure that the petal-shaped contact piece 1-2 is always tightened inward. A fixing groove 1-4 for the tightening spring 1-2 to be clamped therein is provided at the position where the petal-shaped contact piece 1-2 contacts the tightening spring 1-3.

[0033] Furthermore, three contact support connecting rods 1-1-3 are provided, and two petal-shaped contact pieces 1-2 are evenly arranged in the space defined by every two contact support connecting rods 1-1-3.

[0034] In the present invention, the grounding connection line 3 is fixedly connected to the petal-shaped contact mounting ring 1-1-2. Furthermore, each petal-shaped contact 1-2 is connected in series through soft copper wire and then connected to the grounding connection line 3. The present invention also includes a suction column 1-5, and the petal-shaped contact mounting ring 1-1-2 is sleeved on the suction column 1-5. The suction column 1-5 is in contact with the free end of the crank arm 12.

[0035] Specifically, the suction column 1-5 is made of insulating material, so that when the petal-shaped contact 1-2 contacts an electrical device by mistake, the voltage will not be transmitted to the vehicle body through the crank arm 12 and cause the operator to be electrically shocked. A metal sheet is arranged at a position of the suction column 1-5 away from the petal-shaped contact 1-2 for connecting with the crank arm 12, and an electromagnet 13 is arranged at the free end of the crank arm 12 for attracting the suction column.

[0036] A hook operating arm 14 is provided at the top of the grounding plate hook 5, and the hook operating arm 14 connects the top of the grounding plate hook 5. The grounding plate hook wire 6 is connected to the hook operating arm 14, and a compression spring is also provided on the hook operating arm 14 to maintain its initial position.

[0037] A lifting device is also provided on the vehicle frame, the action end of which is fixedly connected to the support plate 10, and an auxiliary lifting rod for maintaining the lifting posture of the support plate is also provided on the vehicle frame;

[0038] The auxiliary lifting rod comprises a vertical channel steel fixedly arranged on the frame, an H-shaped support, and a fixed pulley device, wherein the vertical channel steel is fixedly arranged on the frame, the bottom of the H-shaped support extends into the vertical channel steel and can slide freely therein, the fixed pulley device is arranged at the bottom of the H-shaped support, the fixed pulley device comprises a pulley support plate and a pulley, the pulley is arranged on two surfaces of the pulley support plate, the size of the fixed pulley device is equal to the size of the bottom of the H-shaped support, and the vertical side of the H-shaped support is fixedly connected to the support plate through an angle steel;

[0039] Specifically, the lifting device is a jack 15, which is arranged at the bottom of the frame, and a center piece is arranged on the support plate 10. A rotating gear 15-2 is provided on the upper part of the top rod of the jack, and a chain 15-1 is sleeved on the gear. One end of the chain is fixed downward on the center piece, and the other end is fixed downward on the bottom of the frame. When the top rod of the jack moves upward, the chain is driven to move the center piece upward.

[0040] The present invention also includes a width adjustment device, which includes an adjustment handle 16 and forward and reverse bolts. The forward and reverse bolts pass through the crank arm 12 in sequence. A thread matching the forward and reverse bolts is provided on the crank arm 12. A handle is provided on one side of the forward and reverse bolts. The track plate 11 is also provided with bearings for receiving the forward and reverse bolts. When the forward and reverse bolts rotate, the crank arm 12 moves closer or farther away accordingly.

[0041] A forward and backward device is also provided on the frame, and the forward and backward device includes a forward and backward handle 17 and a bolt. The forward and backward handle 17 is connected to one end of the bolt, and the bolt vertically passes through the vertical channel steel, and a thread matching the bolt is provided on the vertical channel steel.

[0042] When inspecting equipment, the equipment needs to be powered off, but there is a possibility that the power may be forgotten to be turned off due to negligence. Therefore, in order to ensure the safety of the operator, the present invention sets an electric detection device 18 at the front end of the crank arm. Compared with the plum blossom contact wire clamp, the electric detection device 18 contacts the grounding conductor in the cabinet first. If the switch cabinet is not powered off, the electric detection device issues a warning to remind the operator to stop working, so as to prevent the live grounding from causing personal safety or equipment damage accidents.

[0043] Furthermore, an insulating support rod 19 is provided on the crank arm for arranging an electrical testing device. Specifically, the insulating support rod 19 is composed of two mutually parallel insulating tubes and a vertical insulating tube connected end to end, one of which is sleeved on the crank arm 12, and the free end of the crank arm passes through the end of the insulating tube, and the electrical testing device 18 is provided on the other insulating tube, and a compression spring 20 is also provided on the insulating tube where the crank arm is located, so that it can be ensured that the electrical testing device 18 contacts the conductor in the cabinet one step before the plum blossom contact clamp 1, and when the crank arm continues to move forward, the insulating tube support rod will not affect the operation of the crank arm because the excess part is absorbed by the compression spring 20.

[0044] In the present invention, an electromagnet is arranged on the free end surface of the crank arm, and the electromagnet cooperates with the suction column.

[0045] The following is a detailed explanation through specific examples:

[0046] When in use, the height and width of the operating frame and the distance between the grounding plate and the crank arm can be adjusted as needed, and the grounding wire operating electromagnetic suction switch can be closed. The iron plate at the rear end of the insulating rod of the contact on the grounding wire can be placed in position and fixed (electromagnet adsorption). After adjusting the width, the grounding plate can be placed in the walking track of the switch cabinet trolley, and connected to the support plate through the locking hook (the support piece is fixedly connected to the center piece). The center piece is moved forward by the crank. During the forward movement, the grounding plate first opens the sealing door of the conductor contact and presses on the inherent grounding pile head (in accordance with the requirement of connecting to the grounding end first), and then continues to move forward until the tester on the insulating support rod contacts the conductor for electrical testing (stop operation when there is electricity). After there is no voltage, continue to move forward to press the plum blossom contact cover on the conductor contact to complete the grounding. Then disconnect the power supply of the electromagnet and pull open the lock of the grounding plate (the grounding wire is left on the conductor) to exit the operating frame.

Claims

1. A split-type maintenance grounding device for a center-mounted switch cabinet, characterized in that: It includes a vehicle body, an operating part and a grounding part, wherein the operating part is arranged on the vehicle body, the grounding part is arranged on a handcart track arranged on a central switch cabinet, and the operating part is movably connected with the grounding part; The grounding part includes a plum blossom contact wire clamp, a grounding plate and a grounding connection wire, and the plum blossom contact wire clamp is connected to the grounding plate through the grounding connection wire; The operating part includes an operating vehicle, a grounding plate hook, a grounding plate hook wire drawing and an operating handle. The operating vehicle is provided with moving wheels at the four corners of the ground surface. The grounding plate hook is movably connected to the front end of the operating vehicle. The operating handle is provided at the rear end of the operating vehicle. A grounding plate hook wire drawing is provided between the operating handle and the grounding plate hook. A card slot cooperating with the grounding plate hook is provided at the rear end of the grounding plate. The vehicle body comprises a frame, which is an L-shaped structure, wherein a moving wheel is arranged on the horizontal side of the frame, a support plate is arranged on the vertical side of the frame, an operating part is arranged on the support plate, a track plate is arranged vertically at the rear of the operating vehicle, three crank arms are slidably arranged in the track plate, and the free ends of the crank arms are connected to the rear of the insulating part of the plum blossom contact wire clamp, the moving wheels are divided into a traveling wheel arranged on the front side of the frame and a universal wheel arranged on the rear side of the operating vehicle, and a locking device is arranged on the universal wheel; The plum blossom contact wire clamp includes a support body, a petal-shaped contact, and a tightening spring. The support body includes a petal-shaped contact support ring and a petal-shaped contact mounting ring arranged relatively parallel to each other. A contact support connecting rod is arranged between the petal-shaped contact support ring and the petal-shaped contact mounting ring. The tail of the petal-shaped contact is rotatably connected to the petal-shaped contact mounting ring. The front part of the petal-shaped contact is clamped on the petal-shaped contact support ring. The tightening spring is a tension spring connected end to end. The tension spring is sleeved on the outside of the petal-shaped contact to ensure that the petal-shaped contact is always tightened inward. A fixing groove for the tightening spring to be clamped into is arranged at the position where the petal-shaped contact contacts the tightening spring.

2. A split-type maintenance grounding device for a center-mounted switch cabinet according to claim 1, characterized in that: The contact support connecting rods are provided with three pieces, and two petal-shaped contact pieces are evenly arranged in the space defined by every two connecting rods.

3. A split-type maintenance grounding device for a center-mounted switch cabinet according to claim 1, characterized in that: The ground connection line is fixedly connected to the petal-shaped contact piece installation ring, and also includes a suction column, the petal-shaped contact piece installation ring is sleeved on the suction column, and the suction column is in contact with the free end of the crank arm; The suction column is made of insulating material, a metal sheet is arranged at a position of the suction column away from the petal-shaped contact piece, and an electromagnet is arranged at a corresponding position of the free end of the crank arm.

4. A split-type maintenance grounding device for a center-mounted switch cabinet according to claim 1, characterized in that: A hook operating arm is arranged on the top of the grounding plate hook, and the hook operating arm connects the top of the grounding plate hook. The grounding plate hook is connected to the hook operating arm by a wire drawing, and a compression spring is arranged on the hook operating arm to maintain its initial position.

5. A split-type maintenance grounding device for a center-mounted switch cabinet according to claim 1, characterized in that: A lifting device is also provided on the vehicle frame, the action end of the lifting device is fixedly connected to the bottom of the support plate, and an auxiliary lifting rod for maintaining the lifting posture of the support plate is also provided on the vehicle frame; The auxiliary lifting rod comprises a vertical channel steel fixedly arranged on the frame, an H-shaped support, and a fixed pulley device, wherein the vertical channel steel is fixedly arranged on the frame, the bottom of the H-shaped support extends into the vertical channel steel and can slide freely therein, the fixed pulley device is arranged at the bottom of the H-shaped support, the fixed pulley device comprises a pulley support plate and a pulley, the pulley is arranged on two surfaces of the pulley support plate, the size of the fixed pulley device is equal to the size of the bottom of the H-shaped support, and the vertical side of the H-shaped support is fixedly connected to the support plate through an angle steel; The lifting device is a jack, which is arranged at the bottom of the frame, and a center piece is arranged on the supporting plate, and a top rod of the jack is in contact with the center piece.

6. A split-type maintenance grounding device for a center-mounted switch cabinet according to claim 1, characterized in that: It also includes a width adjustment device, which includes a handle and forward and reverse bolts. The forward and reverse bolts pass through the crank arm in sequence. The crank arm is provided with threads that match the forward and reverse bolts. A handle is provided on one side of the forward and reverse bolts. The frame is also provided with bearings for receiving the forward and reverse bolts. When the forward and reverse bolts rotate, the crank arm moves closer or farther away accordingly.

7. A split-type maintenance grounding device for a center-mounted switch cabinet according to claim 1, characterized in that: A forward and backward device is also arranged on the frame, and the forward and backward device comprises a handle and a bolt. The handle is connected to one end of the bolt, and the bolt vertically passes through the vertical channel steel, and a thread matching with the bolt is arranged on the vertical channel steel.

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