Environment-friendly normal-pressure air insulation ring network switch cabinet

Abstract

The present application relates to the technical field of switch cabinet, and discloses an environment-friendly normal-pressure air insulation ring network switch cabinet, which comprises a cabinet body, a sliding frame, a one-way locking assembly, an auxiliary supporting assembly and a position detecting piece. The sliding frame is slidingly installed in the cabinet body and bears electrical equipment. The auxiliary supporting assembly is arranged at the bottom of the inner side of the sliding frame, so that the sliding frame can be supported after extending out of the cabinet body. Meanwhile, the one-way locking assembly allows the sliding frame to move in the outward direction and limits the unexpected return movement of the sliding frame after the sliding frame stops moving outward, thereby reducing the risk of sinking, shaking or return movement of the sliding frame when the sliding frame is only supported by the sliding rail and improving the load stability during the outward movement of the sliding frame for maintenance.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically to an environmentally friendly, atmospheric pressure, air-insulated ring network switchgear. Background Technology

[0002] Environmentally friendly atmospheric pressure air-insulated ring main switchgear is a key piece of equipment in power distribution systems. Because it uses air insulation instead of SF6 gas, it has advantages such as being environmentally friendly and having low maintenance costs, and is gradually being widely used. In order to facilitate the inspection and maintenance of internal electrical equipment, this type of switchgear is usually equipped with slide rails and movable frames inside the cabinet. By sliding the frame outward, the staff can have close contact with and operate the electrical components installed on the frame.

[0003] In existing process designs, the movable frame typically relies solely on slide rails for connection with the cabinet. When the frame is pulled out of the cabinet for maintenance, there is often a lack of effective automatic support devices, requiring staff to manually carry and set up support frames or jacks to maintain balance. Furthermore, the switchgear door structure is relatively conventional, often using hinges. After opening, it relies mainly on the friction of the door hinges or simple mechanical limits to maintain the opening angle, without a dedicated, stable locking structure.

[0004] However, once the cabinet door is opened, it is prone to swaying if exposed to wind or accidentally touched. This instability can interfere with the operation of maintenance personnel and may even affect work safety due to collisions with the cabinet, failing to meet the needs of efficient and stable operation and maintenance.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of this invention is to provide an environmentally friendly, atmospheric pressure air-insulated ring network switchgear that can effectively solve the above-mentioned technical problems.

[0007] To achieve the objectives of this invention, the following technical solution is adopted:

[0008] An environmentally friendly, atmospheric pressure, air-insulated ring main switchgear includes: a cabinet;

[0009] A sliding frame is slidably installed in the inner cavity of the cabinet, and electrical equipment is installed on the sliding frame;

[0010] A one-way locking assembly is fixedly installed through one side of the cabinet to allow the sliding frame to move in the outward direction and restrict the sliding frame from moving in the return direction.

[0011] An auxiliary support assembly is installed at the bottom inside the sliding frame to improve the stability of the sliding frame when it slides outward.

[0012] Position detection component, which can be detachably installed on the inner wall of the cabinet cavity;

[0013] The one-way locking assembly includes a fixed shell that is fixedly installed through one side of the cabinet and a rack plate disposed in the inner cavity of the fixed shell. The bottom of the rack plate is engaged with a movable gear, which is used to rotate in the corresponding direction when the sliding frame moves outward and is locked by the one-way locking assembly when the sliding frame has a tendency to move back.

[0014] Furthermore, the one-way locking assembly also includes a movable rod fixedly installed on the outside of the movable gear. The end of the movable rod is rotatably installed on the inner wall of the cavity of the fixed housing, and a ratchet is fixedly sleeved on the outside of the movable rod. A pawl is engaged on the top of the ratchet, and a rotating rod is fixedly installed through one side of the pawl. The end of the rotating rod extends movably through to the outside of the fixed housing and is fixedly installed with a hand crank.

[0015] Furthermore, a spiral spring is sleeved on the outer side of the rotating rod, one end of the spiral spring is fixedly installed on the rotating rod, and the other end of the spiral spring is fixedly installed with a fixing rod, the end of the fixing rod being fixedly installed on the inner wall of the inner cavity of the fixed shell.

[0016] Furthermore, a shaped connecting plate is fixedly installed on the inner side of the rack plate, and a sliding opening is provided on the inner side of the fixed shell. The outer side of the shaped connecting plate passes through the inner cavity of the sliding opening and is fixedly installed on the sliding frame.

[0017] Furthermore, the auxiliary support assembly includes a lifting plate disposed at the bottom of the inner side of the sliding frame and guide columns detachably installed on both sides of the bottom of the lifting plate. The lower ends of the guide columns slide through and extend to the bottom of the sliding frame, and each is fixedly installed with a support wheel. A suction plate is fixedly installed at the bottom of the lifting plate, and an electromagnet is disposed below the suction plate. An installation groove for accommodating the electromagnet is opened at the bottom of the inner side of the sliding frame.

[0018] Each guide post is fitted with a return spring on its outer side.

[0019] Furthermore, a cabinet door is movably installed on the outside of the cabinet, and a fixing component for fixing the cabinet door is installed on one side of the cabinet;

[0020] The fixing assembly includes a housing fixedly installed on one side of the cabinet. A T-shaped screw is threaded through the housing, and the inner end of the T-shaped screw is rotatably connected to the drive plate. Two square slide rods are fixedly installed on the outer side of the drive plate, and the outer ends of the square slide rods slide through and extend to the outer side of the housing. Two insert rods are fixedly installed on the inner side of the drive plate, and the ends of the insert rods slide through and extend to the outer side of the housing. An insert plate is fixedly installed on the outer side of the cabinet door.

[0021] Both sides of the insert plate are provided with insertion holes that match the insert rod.

[0022] Furthermore, dustproof nets are fixedly installed through both sides of the cabinet;

[0023] The bottom of the sliding frame is fixedly installed with a sliding seat, and slide rails are slidably installed on both sides of the bottom of the sliding seat, and the bottom of the slide rails is fixedly installed on the bottom wall of the cabinet cavity.

[0024] Furthermore, the position detection device is a distance sensor used to detect the movement distance of the sliding frame relative to the cabinet. Both the position detection device and the electromagnet are electrically connected to the controller, which controls the electromagnet to be energized or de-energized according to the distance signal output by the position detection device.

[0025] Furthermore, the controller has a first preset distance and a second preset distance, wherein the first preset distance is greater than the second preset distance; the controller is used to control the electromagnet to be energized when the sliding frame moves outward a distance reaching the first preset distance, and to control the electromagnet to be de-energized when the sliding frame moves back a distance reduced to the second preset distance.

[0026] Furthermore, the controller is also configured to keep the electromagnet de-energized when the sliding frame moves outward and the moving distance is less than the first preset distance, and to keep the electromagnet energized after the sliding frame reaches the first preset distance and before it moves back to the second preset distance.

[0027] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a sliding frame for carrying electrical equipment inside the cabinet and an auxiliary support component at the bottom inside the sliding frame, so that the extended part of the sliding frame can be supported after it slides out of the cabinet; at the same time, the one-way locking component allows the sliding frame to move in the outward direction and restricts its unintended return after the sliding frame stops moving outward, thereby reducing the risk of sinking, shaking or returning when the sliding frame is supported only by the slide rail, and improving the load-bearing stability of the sliding frame when it is moved outward for maintenance. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0029] Figure 1 This is a schematic diagram of the overall structure disclosed in a preferred embodiment of this application;

[0030] Figure 2 This is a partial cross-sectional structural diagram of a preferred embodiment of this application;

[0031] Figure 3 This is a partial right-side cross-sectional view of a preferred embodiment of the present application.

[0032] Figure 4 This is a partial structural schematic diagram of the sliding frame disclosed in a preferred embodiment of this application;

[0033] Figure 5 This is a partial structural schematic diagram of the fixing shell disclosed in a preferred embodiment of this application;

[0034] Figure 6 This is a partial bottom view of the sliding frame disclosed in a preferred embodiment of this application;

[0035] Figure 7 This is a partial cross-sectional view of the cabinet structure disclosed in a preferred embodiment of this application.

[0036] Figure 8 for Figure 5 Enlarged structural diagram at point A in the middle;

[0037] The following are the labeling instructions in the diagram: 1. Cabinet body; 11. Dust filter; 2. Cabinet door; 3. Sliding frame; 31. Sliding seat; 32. Slide rail; 4. Electrical equipment; 5. One-way locking assembly; 51. Fixed shell; 52. Rack plate; 521. Irregular connecting plate; 53. Movable gear; 54. Ratchet; 55. Pawl; 56. Rotating rod; 561. Scroll spring; 562. Fixed rod; 57. Hand crank; 6. Auxiliary support assembly; 61. Lifting plate; 62. Guide column; 621. Return spring; 63. Support wheel; 64. Plug plate; 65. Electromagnet; 7. Fixed assembly; 71. Shell; 72. T-screw; 73. Drive plate; 731. Square slide rod; 74. Insert rod; 75. Insert plate; 751. Insertion hole; 8. Position detection component. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0039] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0040] like Figures 1 to 8 As shown, this invention relates to an environmentally friendly atmospheric pressure air-insulated ring main switchgear, comprising: a cabinet 1, a sliding frame 3, a one-way locking assembly 5, an auxiliary support assembly 6, and a position detection component 8; the sliding frame 3 is slidably installed in the inner cavity of the cabinet 1, and electrical equipment 4 is installed on the sliding frame 3; the one-way locking assembly 5 is fixedly installed through one side of the cabinet 1, for allowing the sliding frame to move in the outward direction and restricting the sliding frame to move in the return direction; the auxiliary support assembly 6 is installed at the bottom of the inner side of the sliding frame 3, for improving the stability of the sliding frame 3 when it slides outward; the position detection component 8 is detachably installed on the inner wall of the inner cavity of the cabinet 1; wherein, the one-way locking assembly 5 includes a fixed shell 51 fixedly installed through one side of the cabinet 1 and a rack plate 52 disposed in the inner cavity of the fixed shell 51, the bottom of the rack plate 52 is engaged with a movable gear 53, the movable gear 53 is used to rotate in the corresponding direction when the sliding frame 3 moves outward, and is locked by the one-way locking assembly 5 when the sliding frame 3 has a tendency to move back.

[0041] The position detection element 8 is a distance sensor installed on the inner wall of the cabinet 1. It is used to detect the distance that the sliding frame 3 moves outward relative to the cabinet 1 from its initial storage position and transmits the corresponding distance signal to the controller. Both the position detection element 8 and the electromagnet 65 are electrically connected to the controller. The controller controls the electromagnet 65 to be energized or de-energized according to the distance signal output by the position detection element 8.

[0042] The controller has a first preset distance and a second preset distance, with the first preset distance being greater than the second preset distance. The first preset distance corresponds to the position where the auxiliary support component 6 has moved with the sliding frame 3 to a position where the support wheel 63 can extend downwards, and the second preset distance corresponds to the position where the support wheel 63 needs to retract upwards during the sliding frame 3's return movement. The movement distance of the sliding frame 3 relative to the cabinet 1 starts from the initial storage position of the sliding frame 3. This movement distance gradually increases as the sliding frame 3 moves outwards from the cabinet 1, and gradually decreases as the sliding frame 3 moves inwards from the cabinet 1.

[0043] When the sliding frame 3 is in its initial retracted position, its movement distance is less than the second preset distance, and the controller keeps the electromagnet 65 de-energized. At this time, the lifting plate 61 is in the upper position under the elastic force of the return spring 621, and the guide column 62 and support wheel 63 are retracted into the bottom of the sliding frame 3 along with the lifting plate 61. When the sliding frame 3 moves outward from the cabinet 1 but the movement distance has not yet reached the first preset distance, the controller continues to keep the electromagnet 65 de-energized, so that the support wheel 63 remains in the retracted state, preventing the support wheel 63 from descending prematurely before reaching the support position.

[0044] When the sliding frame 3 moves outward to a first preset distance, the controller energizes the electromagnet 65 based on the distance signal output by the position detection element 8. After being energized, the electromagnet 65 attracts the suction plate 64 located above it. The suction plate 64 drives the lifting plate 61 to move downward. The guide column 62 and the support wheel 63 move downward synchronously with the lifting plate 61, and the return spring 621 is simultaneously compressed until the support wheel 63 contacts the ground. Afterward, the controller keeps the electromagnet 65 energized, keeping the support wheel 63 in a downward-extending support state to support the portion of the sliding frame 3 extending out of the cabinet 1.

[0045] When the maintenance is completed and the sliding frame 3 is pushed back into the cabinet 1, the position detection component 8 detects that the moving distance of the sliding frame 3 gradually decreases. Before the sliding frame 3 moves back from the position corresponding to the first preset distance to the position corresponding to the second preset distance, the controller keeps the electromagnet 65 energized, so that the support wheel 63 continues to be in contact with the ground and rolls with the sliding frame 3. When the moving distance of the sliding frame 3 decreases to the second preset distance, the controller controls the electromagnet 65 to be de-energized, the suction plate 64 loses its electromagnetic attraction, the return spring 621 releases its elastic potential energy and pushes the lifting plate 61 to return to its original position. The lifting plate 61 drives the support wheel 63 to move upward through the guide column 62, so that the support wheel 63 returns to its stored state before the sliding frame 3 continues to move into the cabinet 1.

[0046] A state-maintaining interval is formed between the first preset distance and the second preset distance. When the sliding frame 3 moves outward but has not yet reached the first preset distance, the electromagnet 65 remains de-energized; after the sliding frame 3 reaches the first preset distance until it moves back to the second preset distance, the electromagnet 65 remains energized. By maintaining the existing working state of the electromagnet 65 between the two preset distances, it is possible to avoid repeated switching of the electromagnet 65 when the sliding frame 3 undergoes slight displacement near the preset position, thus ensuring the stability of the descent and retraction of the support wheel 63.

[0047] The one-way locking assembly 5 also includes a movable rod fixedly installed on the outside of the movable gear 53. The movable rod is coaxially fixed with the movable gear. The end of the movable rod is rotatably installed on the inner wall of the cavity of the fixed housing 51. A ratchet 54 is fixedly sleeved on the outside of the movable rod. A pawl 55 is engaged on the top of the ratchet 54. A rotating rod 56 is fixedly installed through one side of the pawl 55. The end of the rotating rod 56 extends movably through to the outside of the fixed housing 51 and is fixedly installed with a hand crank 57.

[0048] A spiral spring 561 is sleeved on the outer side of the rotating rod 56. One end of the spiral spring 561 is fixedly installed on the rotating rod 56, and the other end of the spiral spring 561 is fixedly installed with a fixing rod 562. The end of the fixing rod 562 is fixedly installed on the inner wall of the inner cavity of the fixing shell 51.

[0049] A shaped connecting plate 521 is fixedly installed on the inner side of the rack plate 52, and a sliding opening is provided on the inner side of the fixing shell 51. The outer side of the shaped connecting plate 521 passes through the inner cavity of the sliding opening and is fixedly installed on the sliding frame 3.

[0050] The one-way locking assembly 5 achieves one-way locking of the sliding frame 3 through the meshing of the rack plate 52 and the movable gear 53 within the fixed housing 51, and the engagement of the ratchet 54 and the pawl 55. When the sliding frame 3 moves outward, the rack plate 52 drives the movable gear 53 and the ratchet 54 to rotate in the permissible direction, and the pawl 55 sequentially passes over the ratchet teeth of the ratchet 54; when the sliding frame 3 stops moving outward, the pawl 55 engages with the ratchet 54, thereby limiting the unintended return movement of the sliding frame 3. When it is necessary to move the sliding frame 3 back into the cabinet 1, the operator turns the hand crank 57, which drives the pawl 55 to separate from the ratchet 54 through the rotating rod 56, and then pushes the sliding frame 3 into the cabinet 1; after the sliding frame 3 returns to the initial position, the hand crank 57 is released, and the pawl 55 re-engages with the ratchet 54 under the action of the spiral spring 561, restoring the one-way locking state.

[0051] The auxiliary support assembly 6 includes a lifting plate 61 disposed on the bottom inner side of the sliding frame 3 and guide columns 62 detachably mounted on both sides of the bottom of the lifting plate 61. The lower ends of the guide columns 62 slide through and extend to the bottom of the sliding frame 3, and each is fixedly mounted with a support wheel 63. A suction plate 64 is fixedly mounted on the bottom of the lifting plate 61, and an electromagnet 65 is disposed below the suction plate 64. An installation groove for accommodating the electromagnet 65 is opened on the bottom inner side of the sliding frame 3. A return spring 621 is sleeved on the outer side of each guide column 62.

[0052] The reset spring 621 is made of high-elasticity stainless steel, which has good corrosion resistance and can adapt to the dusty and humid environment that may exist inside the ring network switchgear. It is made by precision winding and heat treatment process, which has excellent fatigue resistance. It can still maintain stable elastic restoring force after multiple expansion and contraction cycles, ensuring that the support wheel 63 can reliably reset upward after the electromagnet 65 is de-energized, avoiding reset failure due to spring fatigue, and ensuring the long-term stable operation of the auxiliary support component 6.

[0053] Dustproof nets 11 are fixedly installed through both sides of the cabinet 1; a sliding seat 31 is fixedly installed at the bottom of the sliding frame 3, and slide rails 32 are slidably installed on both sides of the bottom of the sliding seat 31, and the bottom of the slide rails 32 is fixedly installed on the bottom wall of the inner cavity of the cabinet 1.

[0054] Reference Figures 1 to 3 and Figure 7 Based on the above embodiments, specifically, a cabinet door 2 is movably installed on the outer side of the cabinet body 1, and a fixing component 7 for fixing the cabinet door 2 is installed on one side of the cabinet body 1; the fixing component 7 includes a housing 71 fixedly installed on one side of the cabinet body 1, a T-shaped screw 72 threaded through the housing 71, and the inner end of the T-shaped screw 72 is rotatably connected to the drive plate 73; two square slide rods 731 are fixedly installed on the outer side of the drive plate 73, and the outer ends of the square slide rods 731 slide through and extend to the outer side of the housing 71; two insertion rods 74 are fixedly installed on the inner side of the drive plate 73, and the ends of the insertion rods 74 slide through and extend to the outer side of the housing 71; an insertion plate 75 is fixedly installed on the outer side of the cabinet door 2; insertion holes 751 matching the insertion rods 74 are opened on both sides of the insertion plate 75; when the cabinet door 2 is rotated to the preset opening position, the insertion holes 751 on the insertion plate 75 are opposite to the insertion rods 74.

[0055] In summary, when using the environmentally friendly atmospheric pressure air-insulated ring main switchgear disclosed in this embodiment of the invention, and when maintenance is required, the cabinet door 2 on the outside of the cabinet body 1 is first opened. Then, the T-shaped screw 72 in the fixing assembly 7 is rotated. The T-shaped screw 72 drives the drive plate 73 to move along the inner cavity of the outer shell 71. The square sliding rod 731 fixed on the outside of the drive plate 73 slides synchronously. At the same time, the insertion rod 74 fixed on the inside of the drive plate 73 moves with the drive plate 73. When the end of the insertion rod 74 is inserted into the insertion hole 751 opened on the insertion plate 75 on the outside of the cabinet door 2, the cabinet door 2 is fixed, preventing the cabinet door 2 from swaying due to external forces.

[0056] Subsequently, the operator pulls the sliding frame 3 outward. The sliding frame 3 slides outward along the slide rail 32 via the sliding seat 31, and drives the rack plate 52 to move via the irregular connecting plate 521. The rack plate 52 drives the movable gear 53 and ratchet 54 to rotate in the allowed direction. The pawl 55 passes over the ratchet teeth of the ratchet 54 in sequence, allowing the sliding frame 3 to move outward. When the sliding frame 3 stops moving outward, the pawl 55 engages with the ratchet 54 to limit the sliding frame 3 from unexpectedly moving back. As the sliding frame 3 moves outward, when the distance sensor 8 detects that the moving distance of the sliding frame 3 has reached the first preset distance, the distance sensor 8 transmits the corresponding distance signal to the controller, and the controller controls the electromagnet 65 to be energized. After the electromagnet 65 is energized, it attracts the suction plate 64 to move downward. The suction plate 64 drives the lifting plate 61, guide column 62 and support wheel 63 to move downward synchronously, and compresses the return spring 621 until the support wheel 63 contacts the ground. Subsequently, the controller keeps the electromagnet 65 energized, so that the support wheel 63 remains in a downward-extending support state, providing support for the part of the sliding frame 3 that extends out of the cabinet 1.

[0057] After maintenance, the operator turns the hand crank 57, which, through the rotating rod 56, causes the pawl 55 to separate from the ratchet 54. While maintaining the unlocked state, the operator pushes the sliding frame 3 back into the cabinet 1. In the initial stage of the sliding frame 3's return movement, the support wheel 63 extends downwards and rolls along the ground. When the distance sensor 8 detects that the sliding frame 3's movement distance has decreased to the second preset distance, the controller de-energizes the electromagnet 65, causing the magnetic attraction plate 64 to lose its electromagnetic attraction. The reset spring 621 releases its elastic potential energy and pushes the lifting plate 61 upwards to reset. The lifting plate 61, through the guide column 62, drives the support wheel 63 upwards and retracts to the bottom of the sliding frame 3, allowing the sliding frame 3 to continue moving back into the cabinet 1. After the sliding frame 3 returns to its initial position, the operator releases the hand crank 57. The spiral spring 561 drives the rotating rod 56 and the pawl 55 to reset, causing the pawl 55 to re-engage with the ratchet 54, restoring the one-way locking state.

[0058] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0059] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An environmentally friendly, atmospheric pressure, air-insulated ring main switchgear, characterized in that, include: Cabinet (1); A sliding frame (3) is slidably installed in the inner cavity of the cabinet (1), and electrical equipment (4) is installed on the sliding frame (3). A one-way locking assembly (5) is fixedly installed through one side of the cabinet (1) to allow the sliding frame (3) to move in the outward direction and restrict the sliding frame from moving in the return direction; An auxiliary support assembly (6) is installed at the bottom inside the sliding frame (3) to improve the stability of the sliding frame (3) when it slides outward. The position detection component (8) is detachably installed on the inner wall of the inner cavity of the cabinet (1); The one-way locking assembly (5) includes a fixed shell (51) fixedly installed through one side of the cabinet (1) and a rack plate (52) disposed in the inner cavity of the fixed shell (51). The bottom of the rack plate (52) is engaged with a movable gear (53). The movable gear (53) is used to rotate in the corresponding direction when the sliding frame (3) moves outward, and is locked by the one-way locking assembly (5) when the sliding frame (3) has a tendency to move back.

2. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 1, characterized in that: The one-way locking assembly (5) also includes a movable rod fixedly installed on the outside of the movable gear (53). The end of the movable rod is rotatably installed on the inner wall of the cavity of the fixed housing (51), and a ratchet (54) is fixedly sleeved on the outside of the movable rod. A pawl (55) is engaged at the top of the ratchet (54). A rotating rod (56) is fixedly installed through one side of the pawl (55). The end of the rotating rod (56) extends movably through to the outside of the fixed housing (51) and is fixedly installed with a hand crank (57).

3. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 2, characterized in that: A spiral spring (561) is sleeved on the outside of the rotating rod (56). One end of the spiral spring (561) is fixedly installed on the rotating rod (56), and the other end of the spiral spring (561) is fixedly installed with a fixing rod (562). The end of the fixing rod (562) is fixedly installed on the inner wall of the inner cavity of the fixing shell (51).

4. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 3, characterized in that: The inner side of the rack plate (52) is fixedly installed with a shaped connecting plate (521), and the inner side of the fixed shell (51) is provided with a sliding opening. The outer side of the shaped connecting plate (521) passes through the inner cavity of the sliding opening and is fixedly installed on the sliding frame (3).

5. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 4, characterized in that: The auxiliary support assembly (6) includes a lifting plate (61) disposed at the bottom of the inner side of the sliding frame (3) and guide columns (62) detachably installed on both sides of the bottom of the lifting plate (61). The lower ends of the guide columns (62) slide through and extend to the bottom of the sliding frame (3), and are fixedly installed with support wheels (63). A suction plate (64) is fixedly installed at the bottom of the lifting plate (61), and an electromagnet (65) is disposed below the suction plate (64). An installation groove for accommodating the electromagnet (65) is opened at the bottom of the inner side of the sliding frame (3). Each guide post (62) is fitted with a return spring (621) on its outer side.

6. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 5, characterized in that: A cabinet door (2) is movably installed on the outside of the cabinet (1), and a fixing component (7) for fixing the cabinet door (2) is installed on one side of the cabinet (1). The fixing component (7) includes a housing (71) fixedly installed on one side of the cabinet (1). A T-shaped screw (72) is threaded through the housing (71), and the inner end of the T-shaped screw (72) is rotatably connected to the drive plate (73). Two square slide rods (731) are fixedly installed on the outer side of the drive plate (73). The outer ends of the square slide rods (731) slide through and extend to the outer side of the housing (71). Two insert rods (74) are fixedly installed on the inner side of the drive plate (73). The ends of the insert rods (74) slide through and extend to the outer side of the housing (71). An insert plate (75) is fixedly installed on the outer side of the cabinet door (2). The insert plate (75) has insertion holes (751) on both sides that match the insert rod (74).

7. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 6, characterized in that: Dustproof nets (11) are fixedly installed on both sides of the cabinet (1). The bottom of the sliding frame (3) is fixedly installed with a sliding seat (31), and slide rails (32) are slidably installed on both sides of the bottom of the sliding seat (31), and the bottom of the slide rails (32) is fixedly installed on the bottom wall of the inner cavity of the cabinet (1).

8. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 5, characterized in that: The position detection element (8) is a distance sensor used to detect the moving distance of the sliding frame (3) relative to the cabinet (1). The position detection element (8) and the electromagnet (65) are both electrically connected to the controller. The controller is used to control the electromagnet (65) to be energized or de-energized according to the distance signal output by the position detection element (8).

9. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 8, characterized in that: The controller has a first preset distance and a second preset distance, the first preset distance being greater than the second preset distance; the controller is used to control the electromagnet (65) to be energized when the sliding frame (3) moves outward to the first preset distance, and to control the electromagnet (65) to be de-energized when the sliding frame (3) moves back to the second preset distance.

10. The environmentally friendly atmospheric pressure air-insulated ring main switchgear according to claim 9, characterized in that: The controller is also used to keep the electromagnet (65) de-energized when the sliding frame (3) moves outward and the moving distance is less than the first preset distance, and to keep the electromagnet (65) energized after the sliding frame (3) reaches the first preset distance until it moves back to the second preset distance.

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