Portable safety isolation device for LH replacement of switch cabinet

Abstract

The utility model belongs to the technical field of switch cabinet isolation devices, and particularly relates to a portable safety isolation device for LH replacement of a switch cabinet, which comprises a base plate, an insulation assembly is arranged on the base plate and comprises a rotatable insulation support arranged on the base plate and an insulation plate slidably arranged on the insulation support, and the insulation support is provided with an insulation groove. The insulating support comprises an insulating supporting rod arranged on the chassis, the insulating plate is in sliding connection with the insulating supporting rod, a sliding groove is formed in the insulating supporting rod, and a sliding rod in sliding connection with the sliding groove is arranged on the insulating plate; by means of the safety isolation device, LH replacement can be completed under the condition that bus power supply is not stopped, and therefore high efficiency of power supply is ensured. The sliding storage mode effectively reduces the design storage space of the insulation assembly and the chassis, so that the occupied space of the whole safety isolation device is saved, and the safety isolation device is more convenient to carry.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinet isolation devices, and in particular relates to a portable safety isolation device used for replacing LH in a switch cabinet. Background Art

[0002] As power system operations continue to grow, user demand for capacity expansion is driving the increasing frequency of current transformer (LH) replacements in 10kV KYN28 switchgear. Due to dimensional discrepancies between the old and new LHs, traditional replacement methods require opening the switchgear's lower contact box, disassembling and remaking the transformer's downconductor busbars, and shutting down the 10kV busbar. This results in power outages for other users in the busbar system, leading to economic losses and reduced power supply reliability.

[0003] At present, there is still a lack of devices that can effectively solve the problem of busbar shutdown. There is an urgent need for a special equipment that can safely and efficiently replace LH without stopping the busbar. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a portable safety isolation device for replacing LH in a switch cabinet.

[0005] A portable safety isolation device for replacing LH in a switch cabinet comprises a chassis, an insulating assembly is provided on the chassis, the insulating assembly comprises an insulating bracket rotatably provided on the chassis, an insulating plate slidably provided on the insulating bracket, the insulating bracket comprises an insulating support rod provided on the chassis, the insulating plate is slidably connected to the insulating support rod, a slide groove is provided on the insulating support rod, and a slide rod slidably connected to the slide groove is provided on the insulating plate.

[0006] Preferably, a tray is provided on the chassis, a surface of the tray is provided with a receiving groove for receiving the insulating component, the insulating bracket is provided on the tray, and the insulating bracket is rotatably connected to the tray.

[0007] Preferably, a connecting device is provided between the insulating plate and the tray, and the insulating plate and the tray are detachably connected via the connecting device.

[0008] Preferably, the connecting device includes a magnetic sheet arranged on the surface of the tray and a metal sheet arranged on the back side of the insulating plate and connected to the magnetic sheet.

[0009] Preferably, a fixing device is provided between the insulating support rod and the insulating plate.

[0010] Preferably, the fixing device includes a spring latch provided on the insulating plate and a socket provided on the insulating support rod for inserting the spring latch.

[0011] Preferably, the insulating plate is provided with an auxiliary device for moving the insulating plate.

[0012] Preferably, the auxiliary device includes an auxiliary support plate detachably connected to the insulating plate, and a connecting sleeve arranged on the insulating plate, and the connecting sleeve is detachably and rotatably connected to the auxiliary support plate.

[0013] Preferably, rollers are provided on both sides of the chassis.

[0014] Preferably, the chassis is provided with a positioning device for its positioning, and the positioning device includes two sliding plates slidably arranged on the chassis, handles connected to the sliding plates, and positioning holes arranged on the sliding plates. The two sliding plates are staggered with each other, and the positioning holes can overlap.

[0015] The technical solution provided by the utility model has at least the following technical effects:

[0016] The utility model discloses a portable safety isolation device for replacing LH in a switch cabinet. When the LH in the switch cabinet needs to be replaced, the operation and maintenance personnel need to turn the switch of the target switch cabinet to the maintenance state and confirm that the line ground knife switch is in the closed position. Then, put on the insulating protective equipment, open the circuit breaker room door, clean up the debris around the door, and prepare the replacement LH and corresponding tools. Afterwards, slowly push the chassis of the special safety isolation device into the switch cabinet, then rotate the insulation component upward 90 degrees, and with the cooperation of the slide groove and the slide rod, slide the insulation plate on the insulation support rod to move it up to the position corresponding to the lower contact box. Under the action of the insulation plate, the isolation and protection function is realized. Afterwards, the operation and maintenance personnel can safely tighten the contact fixing screws, remove the old LH and install the new LH. With the help of the safety isolation device, the replacement of LH can be completed without stopping the bus power supply, thereby ensuring the high efficiency of power supply.

[0017] Once the LH is replaced, the insulation plate can be lowered, and the entire insulation assembly can then be rotated downward to reset. A sliding mechanism between the insulation plate and the insulation bracket allows the safety isolation device to slide upward when needed and then downward for storage when finished. This sliding storage method effectively reduces the design space required for the insulation assembly and chassis, saving space and making the entire safety isolation device more portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of the safety isolation device of Example 1 of the present utility model;

[0020] Figure 2 This is a schematic diagram of the sliding plate structure of Example 1 of the utility model;

[0021] Figure 3 This is a schematic structural diagram of the safety isolation device of Example 2 of the present utility model.

[0022] Explanation of the main figure marks: 1. Chassis; 2. Insulation assembly; 21. Insulation support rod; 22. Insulation plate; 3. Slide groove; 4. Tray; 5. Storage slot; 6. Metal sheet; 7. Magnetic sheet; 8. Spring latch; 9. Auxiliary support plate; 10. Connecting sleeve; 11. Roller; 12. Sliding plate; 13. Handle; 14. Positioning hole; 15. Slot; 16. Insert rod. DETAILED DESCRIPTION

[0023] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0024] like Figure 1 As shown, this embodiment discloses a portable safety isolation device for replacing a load cell (LH) in a switch cabinet. The device comprises a chassis 1, with two rollers 11 disposed on either side of the chassis 1. The rollers 11 engage tracks within the switch cabinet, enabling the chassis 1 to move within the switch cabinet. An insulating assembly 2 is disposed on the chassis 1. The insulating assembly 2 comprises a rotatable insulating bracket disposed on the chassis 1 and an insulating plate 22 slidably disposed on the insulating bracket. The insulating bracket comprises two insulating rods 21 disposed on the chassis 1, located on either side of the chassis 1. The insulating plates 22 are slidably connected to the two insulating rods 21. A slide 3 is disposed on the insulating rods 21, and a slide 3 is disposed on the insulating plate 22. In this embodiment, the slide is a screw (not shown) that passes through the slides 3 on the insulating plates 22 and the insulating rods 21. A locking nut (not shown) is disposed at the end of the screw. A butterfly nut can be used. Rotating the locking nut locks and unlocks the insulating plates 22 and the insulating rods 21. The insulating material of the insulating bracket and the insulating plate 22 is epoxy resin, which has good insulation and mechanical strength.

[0025] When replacing an LH in a switchgear cabinet, operators must switch the switchgear to the inspection state and confirm that the line ground switch is in the closed position. Next, they must don insulating protective gear, open the circuit breaker compartment door, clear debris from the area around the door, and prepare the replacement LH and necessary tools. They then slowly push the chassis 1 of the dedicated safety isolation device into the switchgear cabinet. They then rotate and unfold the insulation plate 22 upward 90 degrees, aligning it perpendicular to the chassis 1. They then turn the locking nut to unlock the insulation plate 22 from the insulation support rod 21. Guided by the guide slot 3 and the slide rod (screw), the insulation plate 22 slides upward on the insulation support rod 21 to a position corresponding to the lower contact box. The insulation plate 22 provides isolation and protection. Operators can then safely tighten the contact retaining screws, remove the old LH, and install the new one. The safety isolation device allows LH replacement without interrupting busbar power supply, ensuring efficient power supply.

[0026] In order to facilitate the storage of the insulating support rod 21 and the insulating plate 22, a tray 4 is provided on the chassis 1. The surface of the tray 4 is provided with a storage groove 5 for accommodating the insulating component 2, and the insulating bracket is mounted on the tray 4 and is rotatably connected to the tray 4. When the safety isolation device is not in use, the insulating plate 22 and the insulating component 2 are properly stored in the storage groove 5. In order to ensure that the insulating component 2 is stored more securely and prevent it from accidentally falling during carrying, a connecting device is provided between the insulating plate 22 and the tray 4. The connecting device enables the insulating plate 22 and the tray 4 to be detachably connected. In this embodiment, the connecting device includes a magnetic sheet 7 provided on the surface of the tray 4, and a metal sheet 6 provided on the back of the insulating plate 22 and connected to the magnetic sheet 7. The material of the metal sheet 6 can be iron sheet, etc., but is not limited to iron sheet. In this embodiment, two metal sheets 6 and two magnetic sheets 7 are provided, one on each side of the insulating plate 22 and the chassis 1. Under the action of the metal sheet 6 and the magnetic sheet 7, the storage and driving stability of the insulating component 2 is improved.

[0027] When using the insulating plate 22, a fixing device is provided between the insulating plate 22 and the insulating support rod 21 to enhance the stability of the insulating plate 22 and the insulating support rod 21. This fixing device includes a spring latch 8 mounted on the insulating plate 22 and a socket mounted on the insulating support rod 21 for the spring latch 8 to be inserted. There are two spring latches 8, one on each side of the insulating plate 22; there are also two corresponding sockets, one on each insulating support rod 21. When the insulating plate 22 is moved to the corresponding position, the spring latch 8 is inserted into the socket and fixed. To store the insulating plate 22, simply pull the spring latch 8 out of the socket.

[0028] like Figure 1 and Figure 2As shown, the chassis 1 is equipped with a positioning device for positioning. This positioning device consists of two sliding plates 12 slidably mounted on the chassis 1, handles 13 connected to the sliding plates 12, and positioning holes 14 installed in the sliding plates 12. The two sliding plates 12 are staggered, and the positioning holes 14 can overlap. Each sliding plate 12 is equipped with a handle 13, which can be used to move the sliding plate 12 laterally. After the chassis 1 is pushed into the switch cabinet, the handles 13 are operated twice in sequence to slide the two sliding plates 12 outward, so that the ends of the sliding plates 12 are inserted into the positioning slots on both sides of the switch cabinet. At this point, the positioning holes 14 of the two sliding plates 12 overlap, and they can be locked by simply inserting a positioning rod (not shown) into the two positioning holes 14. When the chassis 1 needs to be pulled out, the positioning rods are pulled out, and then the handles 13 are operated to move the two sliding plates 12 inward, so that the ends of the sliding plates 12 are free from the positioning slots.

[0029] Example 2, as Figure 3 As shown, in order to make the up and down movement of the insulating plate 22 more convenient, an auxiliary device for its movement is provided on the insulating plate 22. The auxiliary device includes an auxiliary support plate 9 that is detachably connected to the insulating plate 22 and a connecting sleeve 10 provided on the insulating plate 22, and the connecting sleeve 10 and the auxiliary support plate 9 are detachably connected. In addition, a slot 15 for accommodating the auxiliary support plate 9 is also provided on the insulating plate 22. During the movement of the insulating plate 22, the auxiliary support plate 9 can be first taken out of the slot 15, and then the insertion rod 16 at the end of the auxiliary support plate 9 can be inserted into the connecting sleeve 10. The auxiliary support rod is manually operated to drive the insulating plate 22 to move up and down, which is mainly used to solve the problem of limited hand operation distance during the upward movement of the insulating plate 22. When storing the insulating plate 22, the auxiliary support plate 9 can also be inserted into the slot 15 for storage.

[0030] The embodiments disclosed above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A portable safety isolation device for replacing LH in a switch cabinet, comprising a chassis (1), an insulating component (2) provided on the chassis (1), and characterized in that: The insulating assembly (2) comprises an insulating bracket rotatably arranged on a chassis (1), and an insulating plate (22) slidably arranged on the insulating bracket. The insulating bracket comprises an insulating support rod (21) arranged on the chassis (1). The insulating plate (22) is slidably connected to the insulating support rod (21). A sliding groove (3) is provided on the insulating support rod (21). The insulating plate (22) is slidably connected to the sliding groove (3).

2. The portable safety isolation device for replacing LH in switch cabinet according to claim 1 is characterized in that: A tray (4) is provided on the chassis (1), a receiving groove (5) for receiving the insulating component (2) is provided on the surface of the tray (4), the insulating bracket is provided on the tray (4), and the insulating bracket is rotatably connected to the tray (4).

3. The portable safety isolation device for replacing LH in switch cabinet according to claim 2 is characterized in that: A connecting device is provided between the insulating plate (22) and the tray (4), and the insulating plate (22) and the tray (4) are detachably connected via the connecting device.

4. The portable safety isolation device for replacing LH in switch cabinet according to claim 3 is characterized in that: The connecting device comprises a magnetic sheet (7) arranged on the surface of the tray (4) and a metal sheet (6) arranged on the back of the insulating plate (22) and connected to the magnetic sheet (7).

5. The portable safety isolation device for replacing LH in switch cabinet according to claim 3 is characterized in that: A fixing device is provided between the insulating support rod (21) and the insulating plate (22).

6. The portable safety isolation device for replacing LH in switch cabinet according to claim 5, characterized in that: The fixing device comprises a spring latch (8) arranged on an insulating plate (22) and a socket arranged on an insulating support rod (21) for the spring latch (8) to be inserted.

7. The portable safety isolation device for replacing LH in switch cabinet according to claim 1 is characterized in that: An auxiliary device for moving the insulating plate (22) is provided on the insulating plate (22).

8. The portable safety isolation device for replacing LH in switch cabinet according to claim 7, characterized in that: The auxiliary device comprises an auxiliary support plate (9) detachably connected to the insulating plate (22) and a connecting sleeve (10) arranged on the insulating plate (22); the connecting sleeve (10) and the auxiliary support plate (9) are detachably and rotatably connected.

9. The portable safety isolation device for replacing LH in switch cabinet according to claim 1, characterized in that: Rollers (11) are provided on both sides of the chassis (1).

10. The portable safety isolation device for replacing LH in switch cabinet according to claim 1, characterized in that: The chassis (1) is provided with a positioning device for positioning the chassis (1), the positioning device comprising two sliding plates (12) slidably arranged on the chassis (1), a handle (13) connected to the sliding plates (12), and a positioning hole (14) arranged on the sliding plates (12), the two sliding plates (12) being staggered with each other, and the positioning holes (14) being overlapped.

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