A power distribution switchgear convenient for maintenance

Abstract

This invention relates to the field of switchgear, and more particularly to a power distribution switchgear that is easy to maintain. It includes a cabinet; a truck compartment is located inside the cabinet; a truck-type circuit breaker is installed inside the truck compartment; several docking slots are provided on the rear side of the truck compartment, and the connectors of the truck-type circuit breaker are inserted into the corresponding docking slots. This invention achieves the following: when the truck-type circuit breaker is closed, the sliding plate is compressed by the first spring and pushed upwards to the upper side of the receiving frame. At this time, the sealing block separates from the heat dissipation groove. Therefore, after the cooling fan is started, the airflow can form a circulation channel through the connecting cavity and the heat dissipation groove, realizing the extraction and discharge of hot air from the truck compartment, effectively reducing the ambient temperature during the operation of the truck-type circuit breaker and ensuring the stable operation performance of the equipment; when a fault occurs during the operation of the equipment, the loading frame and the truck-type circuit breaker are moved forward through the screw drive mechanism to achieve rapid tripping, preventing the fault from escalating and cutting off the faulty circuit.

Description

Technical Field

[0001] This invention relates to the field of switchgear, and more particularly to a power distribution switchgear that is easy to maintain. Background Technology

[0002] As an important category of switchgear, rotary switchgear is widely used in many power distribution scenarios due to its advantages such as high space utilization and compact layout. At present, most of the mainstream medium and high voltage switchgear on the market adopts the handcart structure. This type of switchgear realizes the on and off control of the circuit through the handcart circuit breaker inside the handcart room. It has the characteristics of modular structure and strong interchangeability, and has been widely used in power distribution systems.

[0003] When performing regular maintenance and repairs on switchgear, the trolley circuit breaker must be completely removed from the switchgear compartment before the circuit breaker body and related components in the compartment can be fully inspected, repaired, or replaced. However, trolley circuit breakers usually integrate multiple components such as the circuit breaker body, operating mechanism, and contact assembly, and are quite heavy. It is almost impossible to remove them manually. Additional auxiliary equipment such as a handling frame must be used, making the operation process cumbersome, time-consuming, and labor-intensive. Summary of the Invention

[0004] In order to overcome the shortcomings of existing technology, which requires additional auxiliary equipment such as a handling frame to remove the handcart-type circuit breaker when repairing and replacing the handcart-type circuit breaker in a rotary switchgear, resulting in a cumbersome, time-consuming and labor-intensive operation process, this invention provides a power distribution switchgear that is easy to maintain.

[0005] The technical solution is as follows: A power distribution switchgear for easy maintenance includes a cabinet; a handcart compartment is provided inside the cabinet; a handcart-type circuit breaker is installed in the handcart compartment; several docking slots are provided on the rear side of the handcart compartment, and the connectors of the handcart-type circuit breaker are inserted into the corresponding docking slots; it also includes a protective door connected to the cabinet; the protective door rotates downward to open; a receiving frame is detachably connected to the protective door; a sliding plate is slidably connected to the receiving frame; several first springs are fixed between the sliding plate and the receiving frame; a heat dissipation groove is provided in the middle of the sliding plate; a communicating cavity is formed between the sliding plate and the receiving frame, and the communicating cavity is connected to... The heat dissipation slots are connected; several sliding grooves are opened on the lower side of the handcart-type circuit breaker; several first sliders are fixedly connected to the upper side of the sliding plate; the sliding grooves on the lower side of the handcart-type circuit breaker can slide on the corresponding first sliders; several air inlet slots are opened on the rear side of the cabinet; several cooling fans are fixedly connected to the protective door; each cooling fan is connected to the connecting cavity; a sealing block for sealing the heat dissipation slots is fixedly connected to the receiving frame; a screw drive mechanism is installed in the handcart compartment; a loading component for loading the handcart-type circuit breaker is connected to the screw drive mechanism; a protective component for sealing the docking slot is installed in the handcart compartment.

[0006] As an improvement to the above solution, the loading assembly includes a loading frame connected to the truck compartment; the loading frame is mounted on the screw drive mechanism inside the truck compartment; a loading slot is opened on the loading frame; several second sliders are fixedly connected to the loading slot; the slide groove on the lower side of the truck circuit breaker can slide on the corresponding second slider; railings are fixedly connected to the left and right sides of the loading frame; a limit plate is fixedly connected to the front side of the two railings.

[0007] As an improvement to the above solution, the protective assembly includes a protective plate connected to the handcart compartment; two insulating partitions are slidably connected to the rear side of the handcart compartment; two left-right symmetrical third sliders are fixedly attached to each insulating partition; each third slider slides on its corresponding protective plate; and a second spring is fixedly connected between each third slider and its corresponding protective plate; a connecting rod is rotatably connected to the front side of each third slider; two connecting rods on the same side are rotatably connected to a pressure block; and each pressure block is located directly behind the movable guardrail.

[0008] As an improvement to the above solution, it also includes a guide rail installed on the lower side of the truck compartment; two sliding blocks are fixed to the lower side of the loading frame; each sliding block slides within the corresponding guide rail.

[0009] By adopting the above-mentioned structure, this invention directly transfers most of the self-weight load of the loading frame and the handcart circuit breaker to the frame structure of the handcart compartment, thereby effectively dispersing and reducing the compressive force borne by the screw drive mechanism, reducing its load, avoiding problems such as deformation and accelerated wear of the screw due to long-term heavy load, and improving the stability of the loading frame movement process.

[0010] As an improvement to the above solution, a placement groove is provided on the protective door, and the receiving frame is located on the placement groove.

[0011] As an improvement to the above solution, a first handle is fixedly attached to the front side of the protective door.

[0012] With the above-described structure, the present invention allows workers to grasp the first handle and flip the protective door downwards to open it, making it easier for workers to open the protective door.

[0013] As an improvement to the above solution, a second handle is fixed to both the left and right sides of the receiving frame.

[0014] As an improvement to the above solution, both the protective door and the protective panel are made of alloy steel plate.

[0015] By adopting the above structure, the protective door and protective plate of this invention have strong impact resistance and excellent high temperature resistance, meeting the mandatory standard requirements for explosion-proof safety of power equipment.

[0016] As an improvement to the above solution, the insulating partition is a modified epoxy resin fiberglass board.

[0017] As an improvement to the above solution, it also includes a hanger; a hanger is rotatably connected between each protective panel and the protective door.

[0018] Beneficial effects: When the handcart-type circuit breaker is closed, the sliding plate is squeezed by the first spring and pushed upward to the upper side of the receiving frame. At this time, the sealing block separates from the heat dissipation groove. Therefore, after the cooling fan is started, the airflow can form a circulation channel through the connecting cavity and the heat dissipation groove, thereby realizing the extraction and discharge of hot air in the handcart compartment, effectively reducing the ambient temperature during the operation of the handcart-type circuit breaker and ensuring the stable working performance of the equipment. When a fault occurs during operation, the screw drive mechanism moves the loading frame and the handcart circuit breaker forward to achieve rapid tripping, prevent the fault from escalating, and cut off the faulty circuit. During this process, the loading frame moves the guardrail and limit plate forward, and the limit plate pushes the sliding plate forward, causing the sealing block to enter the heat dissipation groove and prevent it from being blocked. This seals the heat dissipation channel, isolates the handcart compartment from the external environment, and prevents the leakage of electric arcs and high-temperature gases caused by the fault. At the same time, the guardrail separates from the pressure block, thereby relieving the pressure of the guardrail on the pressure block. This allows the third slider and the insulating partition to move and reset, and then the insulating partition seals the docking groove, preventing the current in the docking groove from flowing into the handcart compartment and damaging the handcart circuit breaker, or even injuring the personnel who perform subsequent maintenance. This improves the safety protection level in fault conditions. During maintenance, if it is necessary to remove the trolley circuit breaker, simply flip the protective door downwards and open it, then pull the trolley circuit breaker forward so that its bottom structure can be precisely embedded in the receiving frame. The circumferential limiting structure of the receiving frame provides stable support for the trolley circuit breaker, preventing it from shaking or tipping over. Then, the worker can remove the fixing screws between the receiving frame and the protective door, and lift the receiving frame and the trolley circuit breaker together to remove them. No additional auxiliary tools are required. Existing technology requires additional auxiliary equipment such as a handling frame to remove the trolley circuit breaker when repairing and replacing it in a rotary switchgear, which is cumbersome, time-consuming, and labor-intensive. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the power distribution switchgear of the present invention, which is convenient for maintenance. Figure 2 This is a diagram showing the closing state of the handcart-type circuit breaker of the present invention; Figure 3 This is a diagram showing the tripping state of the handcart-type circuit breaker of the present invention; Figure 4 This is a state diagram of the handcart-type circuit breaker embedded in the receiving frame according to the present invention; Figure 5 This is an exploded view of the protective door, receiving frame, and sliding plate assembly of the present invention; Figure 6 This is a three-dimensional structural diagram of the protective door, receiving frame, sealing block, sliding plate first spring, cooling fan and first slider assembly of the present invention; Figure 7 This is a three-dimensional structural diagram of the protective plate, the third slider, the supporting component, and the protective component of the present invention.

[0020] The labels in the diagram are as follows: 1-Cabinet, 1001-Handcart compartment, 1002-Connecting slot, 2-Handcart circuit breaker, 101-Protective door, 10101-First handle, 10102-Placement slot, 102-Receiving frame, 10201-Connecting cavity, 10202-Second handle, 103-Blocking block, 104-Sliding plate, 10401-Heat dissipation slot, 105-First spring, 106-Heat dissipation fan, 107-First slider, 108-Hanging rod, 109-Guide rail, 201-Loading frame, 20101-Loading slot, 20102-Second slider, 202-Sliding block, 203-Guardrail, 204-Limiting plate, 205-Protective plate, 206-Third slider, 207-Insulating partition, 208-Connecting rod, 209-Pressure block, 210-Second spring. Detailed Implementation

[0021] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0022] Example 1: A power distribution switchgear that is easy to maintain, such as Figures 1-7 As shown, it includes a cabinet 1 and a handcart-type circuit breaker 2; a handcart compartment 1001 is provided inside the cabinet 1; the handcart-type circuit breaker 2 is installed in the handcart compartment 1001; several docking slots 1002 are provided on the rear side of the handcart compartment 1001, and the connector of the handcart-type circuit breaker 2 is inserted into the corresponding docking slot 1002. It also includes a protective door 101, a receiving frame 102, a sealing block 103, a sliding plate 104, a first spring 105, a cooling fan 106, a loading assembly, and a protective assembly; the protective door 101 is rotatably connected to the front of the handcart compartment 1001; the protective door 101 rotates downwards to open; the receiving frame 102 is bolted to the protective door 101; the sliding plate 104 is slidably connected to the receiving frame 102, and the sliding plate 104 is the same size as the bottom structure of the handcart circuit breaker 2; four first springs 105 are fixed between the sliding plate 104 and the receiving frame 102; a heat dissipation groove 10401 is opened in the middle of the sliding plate 104; a heat dissipation groove 10401 is formed between the sliding plate 104 and the receiving frame 102. There is a connecting cavity 10201, which is connected to the heat dissipation slot 10401; two sliding grooves are opened on the lower side of the handcart-type circuit breaker 2; two first sliders 107 are fixedly connected to the upper side of the sliding plate 104; the sliding grooves on the lower side of the handcart-type circuit breaker 2 can slide on the corresponding first sliders 107; several air inlet slots are opened on the rear side of the cabinet 1; two cooling fans 106 are fixedly connected to the protective door 101; each cooling fan 106 is connected to the connecting cavity 10201; a sealing block 103 is fixedly connected to the receiving frame 102; a screw drive mechanism is installed in the handcart compartment 1001; a loading component is connected to the screw drive mechanism; a protective component is installed in the handcart compartment 1001.

[0023] The loading assembly includes a loading frame 201, railings 203, and a limiting plate 204; the loading frame 201 is installed on the screw drive mechanism inside the handcart compartment 1001; the loading frame 201 has a loading groove 20101, which is C-shaped; two second sliders 20102 are fixedly connected to the loading groove 20101; the sliding groove on the lower side of the handcart circuit breaker 2 can slide on the corresponding second slider 20102; railings 203 are fixedly connected to the left and right sides of the loading frame 201; the front sides of the two railings 203 are bolted together to the limiting plate 204.

[0024] The protective assembly includes a protective plate 205, a third slider 206, an insulating partition 207, a connecting rod 208, a pressure block 209, and a second spring 210. Protective plates 205 are fixedly connected to the left and right sides of the handcart compartment 1001. Two insulating partitions 207 are slidably connected to the rear side of the handcart compartment 1001. Two symmetrically arranged third sliders 206 are fixedly connected to each insulating partition 207. Each third slider 206 slides on its corresponding protective plate 205. A second spring 210 is fixedly connected between each third slider 206 and its corresponding protective plate 205. A connecting rod 208 is rotatably connected to the front side of each third slider 206. Two connecting rods 208 on the same side are rotatably connected to a pressure block 209. Each pressure block 209 is located directly behind the movable guardrail 203.

[0025] In the initial state, the handcart-type circuit breaker 2 is placed in the loading slot 20101. At this time, the left and right sides of the handcart-type circuit breaker 2 are limited by the railing 203, and the front and rear sides of the handcart-type circuit breaker 2 are limited by the C-shaped loading slot 20101 and the limiting plate 204, thereby preventing the handcart-type circuit breaker 2 from rotating or shifting during use, which would affect the normal operation of the handcart-type circuit breaker 2; when closing, if Figure 3 As shown: The screw drive mechanism is activated, causing the loading frame 201 and the handcart-type circuit breaker 2 to move backward. The rear railing 203 then contacts the pressure block 209, pressing it backward. The connecting rod 208 then rotates adaptively, generating a thrust on the third slider 206. At this time, the second spring 210 is compressed, causing the upper third slider 206 to move upward, driving the corresponding insulating partition 207 upward. The lower third slider 206 moves downward, driving the corresponding insulating partition 207 downward, thus releasing the insulating partition 207 from blocking the docking slot 1002. Then, as the loading frame 201 and the handcart-type circuit breaker 2 continue to move backward, the connector of the handcart-type circuit breaker 2 inserts into the corresponding docking slot 1002, completing the closing operation. During the closing process, as... Figure 2 and Figure 6 As shown: the sliding plate 104 is squeezed by the first spring 105 and pushed upward to the upper side of the receiving frame 102. At this time, the sealing block 103 separates from the heat dissipation groove 10401. Therefore, after the cooling fan 106 is started, the airflow enters from the air inlet groove on the rear side of the cabinet 1 and can form a circulation channel with the heat dissipation groove 10401 through the connecting cavity 10201, so as to realize the extraction and discharge of hot air in the handcart compartment 1001, effectively reducing the ambient temperature during the operation of the handcart circuit breaker 2 and ensuring the stable working performance of the equipment.

[0026] When a fault occurs during equipment operation, the screw drive mechanism is activated, driving the loading frame 201 and the handcart-type circuit breaker 2 forward. This pulls the connector of the handcart-type circuit breaker 2 out of the corresponding docking slot 1002, achieving rapid tripping, preventing the fault from escalating and cutting off the faulty circuit. During this process, the loading frame 201 also drives the guardrail 203 and the limit plate 204 forward, causing the limit plate 204 to contact the sliding plate 104 and press it forward. At this time, the first spring 105 is compressed and contracts, the sliding plate 104 moves forward, and the sealing block 103 enters the heat dissipation groove 10401, sealing it and achieving a complete blockage of the heat dissipation channel, preventing... To prevent external airflow from continuously entering the handcart compartment 1001, and to completely seal the protective door 101, preventing the leakage of electric arcs and high-temperature gases generated during a fault from the front of the cabinet 1; at the same time, the railing 203 will separate from the pressure block 209, thereby relieving the pressure of the railing 203 on the pressure block 209. At this time, the second spring 210 extends and resets, thereby driving the third slider 206 and the insulating partition 207 to move and reset, so that the insulating partition 207 seals the docking slot 1002, preventing the current in the docking slot 1002 from leaking into the handcart compartment 1001, which would damage the handcart circuit breaker 2, or even injure the personnel who perform subsequent maintenance, thus improving the safety protection level under fault conditions.

[0027] When the equipment trips due to a fault, staff quickly arrive at the site to inspect and repair the equipment. During the repair process, if it is necessary to remove the handcart-type circuit breaker 2, such as... Figure 3 and Figure 4As shown: The worker only needs to flip the protective door 101 downwards to open it, then remove the limiting plate 204 from the railing 203, and then pull the handcart-type circuit breaker 2 forward, moving it along the guide direction to the area above the sliding plate 104; during this process, the slide groove on the lower side of the handcart-type circuit breaker 2 will first engage with the corresponding first slider 107; since the distance between the first slider 107 and the second slider 20102 is smaller than the width of the handcart-type circuit breaker 2, when the front side of the slide groove on the lower side of the circuit breaker forms a contact limit with the first slider 107, the rear side of the slide groove has not yet disengaged from the second slider 20102. Through the coordinated limiting of the first slider 107 and the second slider 20102, seamless guidance and attitude constraint are achieved for the movement of the circuit breaker, avoiding tilting or jamming during movement; when the handcart-type circuit breaker 2 is pulled to the sliding plate 104, the worker can proceed to the upper area above the sliding plate 104. When the circuit breaker is directly above the 04, its own weight will exert a downward squeezing force on the sliding plate 104, driving the sliding plate 104 to move down synchronously. At this time, the first spring 105 is compressed and contracts, and the handcart-type circuit breaker 2 is inserted into the receiving frame 102. Then, the bottom structure of the handcart-type circuit breaker 2 can be accurately embedded into the receiving frame 102. Through the circumferential limiting structure of the receiving frame 102, the handcart-type circuit breaker 2 is stably supported, preventing it from shaking or tipping over. Then, the worker can remove the fixing screws between the receiving frame 102 and the protective door 101, and then lift the receiving frame 102 and the handcart-type circuit breaker 2 together to remove them without the need for additional auxiliary tools. In the existing technology, when repairing and replacing the handcart-type circuit breaker 2 of the vertical rotary switch cabinet, additional auxiliary equipment such as a handling frame is required to remove the handcart-type circuit breaker 2, which has the disadvantages of cumbersome operation process and time-consuming and labor-intensive.

[0028] In a further preferred embodiment of the present invention, such as Figures 2-4 As shown, it also includes guide rails 109 and sliding blocks 202; two guide rails 109 are fixedly connected to the lower side of the handcart compartment 1001; two sliding blocks 202 are fixedly connected to the lower side of the loading frame 201; each sliding block 202 slides within the corresponding guide rail 109.

[0029] In this embodiment, when the loading frame 201 and the handcart circuit breaker 2 are moved back and forth by the screw drive mechanism, the sliding block 202 will slide back and forth on the guide rail 109. At this time, the guide support structure composed of the guide rail 109 and the sliding block 202 can directly transfer most of the self-weight load of the loading frame 201 and the handcart circuit breaker 2 to the frame structure of the handcart compartment 1001, thereby effectively dispersing and reducing the compressive force borne by the screw drive mechanism, reducing its load, avoiding problems such as deformation and increased wear of the screw due to long-term heavy load, and improving the stability of the loading frame 201 during movement.

[0030] In a further preferred embodiment of the present invention, such as Figure 5 and Figure 6As shown, the protective door 101 has a placement groove 10102, and the receiving frame 102 is located on the placement groove 10102.

[0031] In this embodiment, when the worker puts the receiving frame 102 and the handcart circuit breaker 2 back onto the protective door 101, the worker only needs to put the receiving frame 102 into the placement slot 10102 to align the receiving frame 102 with the screw holes on the protective door 101, and at the same time align the handcart circuit breaker 2 with the loading frame 201, which facilitates the installation of the receiving frame 102 and the reset of the handcart circuit breaker 2.

[0032] In a further preferred embodiment of the present invention, such as Figure 2 As shown, a first handle 10101 is fixedly connected to the front side of the protective door 101.

[0033] In this embodiment, the worker can grasp the first handle 10101 to flip the protective door 101 downwards and open it, making it easier for the worker to open the protective door 101.

[0034] In a further preferred embodiment of the present invention, such as Figure 3 As shown, the receiving frame 102 has a second handle 10202 fixedly connected to both the left and right sides.

[0035] In this embodiment, when the worker moves the receiving frame 102 and the handcart-type circuit breaker 2 down, he can hold the second handle 10202 to apply force, which makes it easier for the worker to lift the receiving frame 102 and the handcart-type circuit breaker 2 up and down.

[0036] In a further preferred embodiment of the present invention, both the protective door 101 and the protective plate 205 are made of alloy steel plate.

[0037] In this embodiment, the protective door 101 and the protective plate 205 have strong impact resistance and excellent high temperature resistance. They can withstand the instantaneous high temperature (1000-2000℃) generated by the electric arc fault without melting, thus meeting the mandatory standard requirements for explosion-proof safety of power equipment.

[0038] In a further preferred embodiment of the present invention, the insulating partition 207 is a modified epoxy resin glass fiber board.

[0039] In this embodiment, the insulating partition 207 has excellent insulation performance, high temperature resistance and flame retardancy. The continuous operating temperature can reach 130℃, and the flame retardancy rating reaches UL94V-0. It does not burn or produce toxic fumes when exposed to high temperatures from electric arcs. It can withstand the instantaneous high temperature of electric arcs generated during the insertion and removal of the handcart-type circuit breaker 2. It is also resistant to damp heat and acid and alkali. It is not prone to powdering or cracking in the humid and dusty environment inside the switch cabinet, and its service life is consistent with that of the main body of the switch cabinet.

[0040] Example 2: Based on Example 1, such as Figure 3As shown, it also includes a hanger 108; each protective plate 205 and the protective door 101 are rotatably connected by a hanger 108.

[0041] In this embodiment, when the protective door 101 is rotated downwards and opened, the hanger 108 will unfold synchronously with the rotation of the protective door 101. Then, one end of the hanger 108 remains in a rotating connection with the protective plate 205, and the other end forms an oblique support structure as the protective door 101 moves downwards, which plays a stabilizing traction role on the opened protective door 101 and improves the load-bearing capacity of the protective door 101.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power distribution switchgear that is easy to maintain, comprising a cabinet (1); a truck compartment (1001) is provided inside the cabinet (1); a truck-type circuit breaker (2) is installed in the truck compartment (1001); a plurality of docking slots (1002) are provided on the rear side of the truck compartment (1001), and the connector of the truck-type circuit breaker (2) is inserted into the corresponding docking slot (1002); characterized in that, It also includes a protective door (101) and a receiving frame (102) connected to the cabinet (1); the protective door (101) can be opened by rotating downwards; the receiving frame (102) is detachably connected to the protective door (101); a sliding plate (104) is slidably connected to the receiving frame (102); several first springs (105) are fixed between the sliding plate (104) and the receiving frame (102); a heat dissipation groove (10401) is provided in the middle of the sliding plate (104); a connecting cavity (10201) is formed between the sliding plate (104) and the receiving frame (102), and the connecting cavity (10201) is connected to the heat dissipation groove (10401); several sliding grooves are provided on the lower side of the handcart-type circuit breaker (2); the sliding plate (104) has several sliding grooves on the lower side of the handcart-type circuit breaker (2); Several first sliders (107) are fixedly connected to the side; the slide groove on the lower side of the handcart circuit breaker (2) can slide on the corresponding first slider (107); several air inlet slots are opened on the rear side of the cabinet (1); several cooling fans (106) are fixedly connected to the protective door (101); each cooling fan (106) is connected to the connecting cavity (10201); a sealing block (103) for sealing the heat dissipation slot (10401) is fixedly connected to the receiving frame (102); a screw drive mechanism is provided in the handcart compartment (1001); a loading component for loading the handcart circuit breaker (2) is connected to the screw drive mechanism; a protective component for sealing the docking slot (1002) is provided in the handcart compartment (1001).

2. The easily maintainable power distribution switchgear according to claim 1, characterized in that, The loading assembly includes a loading frame (201) connected to the handcart compartment (1001); the loading frame (201) is installed on the screw drive mechanism in the handcart compartment (1001); a loading slot (20101) is opened on the loading frame (201); several second sliders (20102) are fixedly connected to the loading slot (20101); the sliding groove on the lower side of the handcart circuit breaker (2) can slide on the corresponding second slider (20102); railings (203) are fixedly connected to the left and right sides of the loading frame (201); a limit plate (204) is fixedly connected to the front side of the two railings (203).

3. The easily maintainable power distribution switchgear according to claim 1, characterized in that, The protective assembly includes a protective plate (205) connected to the handcart compartment (1001); two insulating partitions (207) are slidably connected to the rear side of the handcart compartment (1001); two left-right symmetrical third sliders (206) are fixedly connected to each insulating partition (207); each third slider (206) slides on the corresponding protective plate (205); and a second spring (210) is fixedly connected between each third slider (206) and the corresponding protective plate (205); a connecting rod (208) is rotatably connected to the front side of each third slider (206); two connecting rods (208) on the same side are rotatably connected to a pressure block (209); each pressure block (209) is located directly behind the movable guardrail (203).

4. A power distribution switchgear that is easy to maintain according to claim 3, characterized in that, It also includes a guide rail (109) installed on the lower side of the handcart compartment (1001); two sliding blocks (202) are fixedly connected to the lower side of the loading frame (201); each sliding block (202) slides in the corresponding guide rail (109).

5. A power distribution switchgear that is easy to maintain according to claim 1, characterized in that, The protective door (101) has a placement groove (10102) and the receiving frame (102) is located on the placement groove (10102).

6. A power distribution switchgear that is easy to maintain according to any one of claims 1-5, characterized in that, The first handle (10101) is fixed to the front side of the protective door (101).

7. A power distribution switchgear that is easy to maintain according to claim 5, characterized in that, The receiving frame (102) has a second handle (10202) fixed to both the left and right sides.

8. A power distribution switchgear that is easy to maintain according to claim 6, characterized in that, Both the protective door (101) and the protective panel (205) are made of alloy steel plate.

9. A power distribution switchgear that is easy to maintain according to claim 3, characterized in that, The insulating partition (207) is a modified epoxy resin glass fiber board.

10. A power distribution switchgear that is easy to maintain according to claim 9, characterized in that, It also includes a boom (108); a boom (108) is rotatably connected between each protective panel (205) and the protective door (101).

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