A safety type draw-out switchgear

Abstract

The application discloses a safe draw-out switch cabinet and relates to the technical field of switch cabinets. The safe draw-out switch cabinet comprises a cabinet body, a plurality of mounting cavities are arranged on one side of the cabinet body, a plurality of wiring cavities matched with the mounting cavities are arranged on the other side of the cabinet body, a partition is arranged between the mounting cavities and the wiring cavities, a plurality of draw-out openings are arranged on one side of the cabinet body and are in communication with the mounting cavities, and a back door for closing the wiring cavities is arranged on the other side of the cabinet body. The third spring and the T-shaped sliding rod are arranged to provide a pushing force for the plug-in sleeve when the switch is closed, so that the plug-in sleeve and the plug-in head are tightly contacted to avoid a poor contact position. Meanwhile, the insulating gate is arranged to close the partition after the switch is opened, so that the plug-in sleeve is isolated, the problems of accidental touch and arc discharge are avoided, and the safety is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically a safety-type withdrawable switchgear. Background Technology

[0002] A withdrawable low-voltage switchgear is a complete set of equipment that assembles low-voltage electrical components (such as circuit breakers, contactors, relays, etc.) in a withdrawable "drawer unit" and consists of a cabinet frame, busbar system, secondary circuits, etc. For example, the withdrawable low-voltage power switchgear proposed in authorization announcement number CN113224680B can prevent the drawer from shaking. The switchgear includes a cabinet, and a drawer compartment is opened on the front side of the cabinet. A drawer is slidably connected inside the drawer compartment. The left and right surfaces of the drawer are provided with heat dissipation holes that communicate with the inside of the drawer. A sliding groove is opened at the bottom of the drawer and a second limiting groove is opened at the top of the drawer. This device, through the setting of a ball and related components, allows the drawer to be pulled out smoothly.

[0003] However, the aforementioned switchgear still has certain shortcomings in its application. The device can buffer the shaking by setting up a drawer that can move up and down, but because the drawer is equipped with terminals that connect to the busbars inside the cabinet, and the terminals are generally rigid plug-in structures, this drawer and shaking buffering method can cause the connecting terminals to shift. This can lead to fatigue and breakage of the terminals, as well as poor electrical contact of the terminals. At the same time, the existing switchgear lacks protection for the busbar terminals after the drawer is pulled out, and the busbar terminals are directly exposed inside the drawer opening, which poses a risk of accidental contact and arcing. Summary of the Invention

[0004] The purpose of this invention is to provide a safe withdrawable switchgear to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A safety-type withdrawable switch cabinet includes a cabinet body. One side of the cabinet body has several mounting cavities, and the other side has wiring cavities that mate with the mounting cavities. Partitions between the mounting cavities and the wiring cavities have openings. One side of the cabinet body has several pull-out openings communicating with the interior of the mounting cavities. The other side of the cabinet body has a back door for closing the wiring cavities. Sliding rods are fixedly connected to the four corners of the pull-out openings inside the mounting cavities. A pull-out frame is provided between the four sliding rods. An opening is provided at the end of the pull-out frame near the wiring cavities. Sliding seats that slidably connect to the sliding rods are fixedly connected to the upper and lower surfaces of the pull-out frame. A drawer module is provided inside the pull-out frame. Busbar assemblies that mate with the drawer modules are provided inside each wiring cavity. Operating components for separating the drawer modules from the busbar assemblies are provided at the bottom of each mounting cavity. A safety gate for isolating the busbar assemblies is provided inside each wiring cavity.

[0006] As a further aspect of the present invention: the drawer module includes a drawer box, which is slidably connected within a pull-out frame. An upper terminal is provided on the upper end of the drawer box near the wiring cavity, and a lower terminal is provided below the upper terminal. A circuit control assembly electrically connected to the upper and lower terminals is provided inside the drawer box. A plug is fixedly connected to the end of each upper terminal. A locking hole is provided in the middle of the upper surface of the drawer box away from the plug. A guide ramp is provided near the locking hole. An avoidance groove is provided in the middle of the upper surface of the drawer box near the plug. A locking assembly for locking the drawer box by engaging with the locking hole is provided at the upper end of the pull-out frame.

[0007] As a further embodiment of the present invention: the locking assembly includes a top block, which is fixedly connected to the middle of the upper surface of the pull-out frame away from the opening. The top block has an upper slot at its upper end and an inner sliding groove inside the top block. A cross locking rod is slidably connected in the inner sliding groove. A pull ring is fixedly connected to one end of the upper end of the cross locking rod that passes through the upper slot. A second spring is installed between the two side blocks of the cross locking rod and the upper surface of the inner sliding groove.

[0008] As a further embodiment of the present invention: the busbar assembly includes two insulating plates, which are fixedly connected in the wiring cavity. Each insulating plate is slidably connected with a plurality of T-shaped sliding rods that match the positions of the plugs. An insulating sheet is fixedly connected to one end of the T-shaped sliding rod near the plug. A plug sleeve that engages with the plug is fixedly connected to the insulating sheet. A third spring passes through the T-shaped sliding rod at the position between the insulating sheet and the insulating plate. Each plug sleeve is fixedly connected with a wiring terminal.

[0009] As a further embodiment of the present invention: the operating component includes a rack, which is fixedly connected to the middle of the lower end face of the pull-out frame. A rotating shaft is rotatably connected to each of the mounting cavities located below the pull-out frame. A gear is fixedly connected to the rotating shaft, meshing with the rack. A hollow step pull rod is fixedly connected to one end of the rotating shaft extending out of the cabinet. An arc-shaped block is fixedly connected to the cabinet near the hollow step pull rod, with the center of the arc-shaped block concentric with the rotating shaft. Limit blocks are fixedly connected to both ends of the arc-shaped block, and locking grooves are provided near the limit blocks on each arc-shaped block. The stepped surface of the hollow step pull rod is slidably connected to the inner surface of the arc-shaped block, and a positioning lock that engages with the locking groove is provided inside the hollow step pull rod.

[0010] As a further embodiment of the present invention: the positioning lock includes a pressure rod, which is slidably connected inside the hollow step rod. The upper end of the pressure rod protrudes from the hollow step rod, and the lower end of the pressure rod is fixedly connected to an L-shaped locking rod. The upper end of the L-shaped locking rod is slidably connected to the step surface of the hollow step rod, and a first spring is installed between the lower end face of the L-shaped locking rod and the lower end face inside the hollow step rod.

[0011] As a further embodiment of the present invention: the safety gate includes an insulating horizontal plate, which is fixedly connected to the middle of the partition. Insulating gate plates are provided at the positions above and below the partition of the wiring cavity. Vertical sliding grooves are provided at both the upper and lower ends of the partition between the mounting cavity and the wiring cavity. A limiting slide is fixedly connected to the side of the insulating gate plate near the mounting cavity. The limiting slide is slidably connected to the vertical sliding groove. End rollers are rotatably connected to the ends of the limiting slides. Inclined push plates are fixedly connected to the upper and lower ends of the pull-out frame at positions corresponding to the end rollers. Tension springs are installed between the insulating gate plate and both sides of the insulating horizontal plate.

[0012] As a further embodiment of the present invention: both the upper and lower ends of the pull-out opening are provided with avoidance grooves for avoiding the top block and the rack.

[0013] As a further aspect of the present invention: the back door is provided with a door lock latch for locking the back door.

[0014] As a further embodiment of the present invention: the connector is conical, the insertion hole of the connector sleeve is conical, and the connector and the connector sleeve are adapted to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through its designed operating components, controls the separation and closure of the connector and the socket, allowing the connector and socket to be separated before the drawer module is pulled out, thus cutting off the power and effectively improving operational safety. The operating components employ a lever-type operation, making force application more convenient and enabling rapid pushing and pulling of the drawer frame. The connector and socket can be engaged and disengaged without touching the drawer module. Furthermore, a positioning lock is installed inside the hollow stepped pull rod to lock the drawer frame in its pulled-out or pushed-in position, effectively preventing accidental closing or opening of the circuit breaker due to accidental contact, thus significantly enhancing safety.

[0016] 2. The invention provides a thrust to the plug sleeve when the circuit is closed by using a third spring and a T-shaped slide bar, thereby ensuring tight contact between the plug and the plug sleeve and avoiding poor contact. At the same time, the insulating gate can be used to close the partition after the circuit is opened, isolating the plug sleeve and thus avoiding accidental contact and arcing, which greatly improves safety.

[0017] 3. The present invention can position and guide the pull-out frame by setting a sliding seat and a sliding rod, which improves the smoothness of the movement of the pull-out frame and ensures that the connector can be accurately inserted into the T-shaped sliding rod. At the same time, with the positioning lock, it can prevent relative displacement between the connector and the T-shaped sliding rod, thus ensuring the stability of the electrical connection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the back of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the present invention.

[0021] Figure 4 This is a cross-sectional view of the cabinet structure in this invention.

[0022] Figure 5 This is a schematic diagram of the structure of the operating component in this invention.

[0023] Figure 6 This is a cross-sectional view of the hollow stepped tie rod in this invention.

[0024] Figure 7 This is a schematic diagram of the drawer module in this invention.

[0025] Figure 8 This is a schematic diagram of the locking assembly in this invention.

[0026] Figure 9 This is a schematic diagram of the busbar assembly in this invention.

[0027] Figure 10 This is a schematic diagram of the safety gate in this invention.

[0028] Figure 11 This is a schematic diagram of the internal structure of the mounting cavity in this invention.

[0029] The components include: 1. Cabinet; 2. Cable inlet; 3. Operating components; 4. Pull-out frame; 5. Drawer module; 6. Back door; 7. Cable outlet; 8. Busbar assembly; 9. Safety gate; 10. Mounting cavity; 11. Pull-out opening; 12. Sliding rod; 13. Sliding seat; 14. Wiring cavity; 15. Through opening; 16. Partition opening; 31. Rack; 32. Shaft; 33. Gear; 34. Locking groove; 35. Hollow stepped tie rod; 36. Arc-shaped block; 37. Positioning lock; 371. L-shaped locking rod; 372. First spring; 373. Pressure rod; 51. Drawer box; 52. Lower terminal; 53. Connector; 54. Upper terminal; 55. Avoidance groove; 56. Circuit control assembly; 57. Guide ramp; 58. Lock hole; 59. Lock assembly; 591. Top block; 592. Pull ring; 593. Upper slot; 594. Inner slide groove; 595. Cross lock bar; 596. Second spring; 81. Insulating sheet; 82. Terminal block; 83. T-shaped slide bar; 84. Insulating plate; 85. Third spring; 86. Plug-in sleeve; 91. Insulating horizontal plate; 92. Insulating gate plate; 93. Vertical slide groove; 94. Tension spring; 95. Limiting slide; 96. Inclined push plate; 97. End roller. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-11 In this embodiment of the invention, a safety-type withdrawable switch cabinet includes a cabinet body 1. One side of the cabinet body 1 has several mounting cavities 10, and the other side of the cabinet body 1 has a wiring cavity 14 that matches the mounting cavities 10. The partitions between the mounting cavities 10 and the wiring cavity 14 each have a separation opening 16. One side of the cabinet body 1 has several pull-out openings 11 that communicate with the interior of the mounting cavities 10. The other side of the cabinet body 1 has a back door 6 for closing the wiring cavity 14. The back door 6 has a door latch for locking the back door 6. The back door 6 can be opened for easy wiring, and the inlet 2 and outlet 7 facilitate cable insertion.

[0032] Inside the mounting cavity 10, at each of the four corners of the pull-out opening 11, a sliding rod 12 is fixedly connected. A pull-out frame 4 is provided between the four sliding rods 12. The pull-out frame 4 has an opening 15 at one end near the wiring cavity 14. The upper and lower ends of the pull-out frame 4 are fixedly connected to sliding seats 13 that are slidably connected to the sliding rods 12. The pull-out frame 4 has a drawer module 5 inside. The sliding rods 12 and sliding seats 13 can guide the movement of the pull-out frame 4, making the movement of the pull-out frame 4 more stable and smooth.

[0033] The drawer module 5 includes a drawer box 51, which is slidably connected within the pull-out frame 4. An upper terminal 54 is located on the upper end of the drawer box 51 near the wiring cavity 14, and a lower terminal 52 is located below the upper terminal 54. The connection points between the lower terminal 52 and the drawer box 51 are insulated. Inside the drawer box 51 is a circuit control component 56 electrically connected to the upper terminal 54 and the lower terminal 52. A connector 53 is fixedly connected to the end of each upper terminal 54. A latch is located in the middle of the upper surface of the drawer box 51 on the side away from the connector 53. The drawer box 51 has a guide ramp 57 near the locking hole 58. The upper surface of the drawer box 51 near the plug 53 has a clearance groove 55 in the middle. The upper end of the pull-out frame 4 has a locking assembly 59 for locking the drawer box 51 in conjunction with the locking hole 58. The circuit control assembly 56 consists of a circuit breaker, contactor, thermal relay, fuse, and control circuit elements. This part is existing technology and will not be described in detail here. Through the locking hole 58 and the guide ramp 57, the drawer box 51 can be locked in conjunction with the locking assembly 59 during use.

[0034] The locking assembly 59 includes a top block 591, which is fixedly connected to the middle of the upper surface of the pull-out frame 4 away from the opening 15. The top block 591 has an upper slot 593 at its upper end and an inner sliding groove 594 inside. A cross locking rod 595 is slidably connected within the inner sliding groove 594. A pull ring 592 is fixedly connected to one end of the cross locking rod 595 that passes through the upper slot 593. Second springs 596 are installed between the two side blocks of the cross locking rod 595 and the upper surface of the inner sliding groove 594. The pull-out opening... Both the upper and lower ends of the 11 are provided with avoidance grooves to avoid the top block 591 and the rack 31; when locking the drawer box 51, the drawer box 51 is pushed into the pull-out frame 4, and the cross lock bar 595 moves upward under the action of the guide ramp 57. After the drawer box 51 is pushed into place, the cross lock bar 595 will fall into the lock hole 58 under the action of the second spring 596 to lock the drawer box 51. When it is necessary to unlock, the cross lock bar 595 is pulled upward by the pull ring 592, so that the cross lock bar 595 is pulled out from the lock hole 58 to unlock.

[0035] Each wiring cavity 14 is equipped with a busbar assembly 8 that mates with the drawer module 5. Each busbar assembly 8 includes two insulating plates 84, which are fixedly connected within the wiring cavity 14. Several T-shaped sliding rods 83, corresponding to the positions of the connectors 53, are slidably connected to each insulating plate 84. An insulating sheet 81 is fixedly connected to one end of each T-shaped sliding rod 83 near the connector 53. A plug-in sleeve 86, which engages with the connector 53, is fixedly connected to the insulating sheet 81. The T-shaped sliding rod 83 is positioned near the insulating sheet 81. A third spring 85 is inserted between the 1 and the insulating plate 84. Each of the plug sleeves 86 is fixedly connected to a terminal 82. The plug 53 is conical, and the plug hole of the plug sleeve 86 is conical. The plug 53 and the plug sleeve 86 are adapted to each other. The plug sleeve 86 can cooperate with the plug 53 to achieve electrical connection during connection. The third spring 85 can apply elastic force to the plug sleeve 86, so that the plug sleeve 86 can press against the plug 53 to achieve stable connection and avoid poor contact.

[0036] Each mounting cavity 10 has an operating component 3 at its bottom for separating the drawer module 5 from the busbar assembly 8. The operating component 3 includes a rack 31, which is fixedly connected to the middle of the lower end face of the pull-out frame 4. A rotating shaft 32 is rotatably connected to each mounting cavity 10 below the pull-out frame 4. A gear 33 is fixedly connected to the rotating shaft 32, meshing with the rack 31. A hollow step rod 35 is fixedly connected to one end of the rotating shaft 32 extending out of the cabinet 1. An arc-shaped block 36 is fixedly connected to the cabinet 1 near the hollow step rod 35. The center of the arc-shaped block 36 is concentric with the rotating shaft 32. Limit blocks are fixedly connected to both ends of the arc-shaped block 36, and locks are provided near the limit blocks on each arc-shaped block 36. The hollow stepped pull rod 35 is slidably connected to the inner surface of the arc-shaped block 36 via a fixed groove 34. A positioning lock 37, which engages with the locking groove 34, is provided inside the hollow stepped pull rod 35. When the pull-out frame 4 needs to be pulled out or pushed in, the positioning lock 37 is first unlocked. After unlocking, the hollow stepped pull rod 35 can be moved, causing the rotating shaft 32 to rotate. The rotation of the rotating shaft 32 drives the gear 33 to rotate, which in turn drives the rack 31 to move. The movement of the rack 31 moves the pull-out frame 4, thus enabling the pull-out or push-in of the pull-out frame 4. Simultaneously, the locking grooves 34 at both ends of the arc-shaped block 36 can engage with the positioning lock 37 to lock the pull-out frame 4 in its pushed-in and pulled-out states, respectively.

[0037] The positioning lock 37 includes a pressure rod 373, which is slidably connected inside the hollow step rod 35. The upper end of the pressure rod 373 protrudes from the hollow step rod 35, and the lower end of the pressure rod 373 is fixedly connected to an L-shaped locking rod 371. The upper end of the L-shaped locking rod 371 is slidably connected to the step surface of the hollow step rod 35, and a first spring 372 is installed between the lower end face of the L-shaped locking rod 371 and the lower end face inside the hollow step rod 35. When unlocking, the pressure rod 373 is pressed down to move the L-shaped locking rod 371 down. After moving down, the L-shaped locking rod 371 is pulled out from the locking groove 34, thus unlocking can be achieved. At this time, the hollow step rod 35 can be moved. After the L-shaped locking rod 371 reaches the position of the locking groove 34, the pressure rod 373 can be released. Then, under the action of the first spring 372, the L-shaped locking rod 371 is inserted into the corresponding locking groove 34 to lock again.

[0038] Each wiring cavity 14 is equipped with a safety gate 9 for isolating the busbar assembly 8. The safety gate 9 includes an insulating horizontal plate 91, which is fixedly connected to the middle of the partition 16. Insulating gate plates 92 are provided above and below the partition 16 in each wiring cavity 14. Vertical sliding grooves 93 are provided at both the upper and lower ends of the partition between the mounting cavity 10 and the wiring cavity 14. A limiting slide 95 is fixedly connected to the side of the insulating gate plate 92 near the mounting cavity 10. The limiting slide 95 is slidably connected to the vertical sliding groove 93. End rollers 97 are rotatably connected to the ends of the limiting slide 95. The upper and lower ends of the pull-out frame 4 correspond to the end rollers 97. The positions of the two insulating gates 92 and the insulating horizontal plate 91 are all fixedly connected with inclined push plates 96. Tension springs 94 are installed between the two sides of the insulating gate 92 and the insulating horizontal plate 91. When the pull-out frame 4 is pulled out, the limiting slide 95 loses the push of the inclined push plate 96. At this time, the insulating gate 92 will move towards the insulating horizontal plate 91 and close under the action of the tension spring 94, thereby isolating the connection between the wiring cavity 14 and the mounting cavity 10. When the pull-out frame 4 is pushed in, the inclined push plate 96 will first contact the end roller 97 and push the limiting slide 95. The limiting slide 95 drives the insulating gate 92 to move, so that the two insulating gates 92 move away from each other, thereby opening the separation port 16. At this time, the plug 53 can be normally connected to the plug sleeve 86.

[0039] The working principle of this invention is as follows: During use, the required cable is threaded into the inlet 2 and connected to the terminal 82 at the upper end of the wiring cavity 14. Then, the outlet cable is connected to the terminal 82 at the lower end of the wiring cavity 14 and passes through the outlet 7. After the cable connection is complete, press the lever 373 to lower the L-shaped locking lever 371. After lowering, the L-shaped locking lever 371 is pulled out of the locking groove 34, thus unlocking the device. Then, the hollow step lever 35 is moved, causing the rotating shaft 32 and gear 33 to rotate accordingly, thereby driving the rack 31 and the pull-out frame 4 to move out of the cabinet 1, realizing the pull-out of the pull-out frame 4. Then, the required drawer module 5 is loaded into the pull-out frame 4. During loading, the drawer box 51 is inserted into the pull-out frame 4 and pushed deeper into the pull-out frame 4. After the drawer box 51 is pushed into the pull-out frame 4, the cross locking lever 595 moves upward under the action of the guide ramp 57, and then... After the drawer box 51 is pushed into place, the cross locking rod 595 will fall into the locking hole 58 under the action of the second spring 596 to lock the drawer box 51, thereby completing the loading of the drawer module 5. After the drawer module 5 is loaded, press the pressure rod 373 again to move the L-shaped locking rod 371 down. After moving down, the L-shaped locking rod 371 is pulled out from the locking groove 34. Then, turn the hollow step pull rod 35 in the opposite direction to drive the rotating shaft 32 and gear 33 to rotate accordingly, so that the pull-out frame 4 is pushed into the mounting cavity 10. After pushing in, release the pressure rod 373. Then, the L-shaped locking rod 371 is inserted into the corresponding locking groove 34 under the action of the first spring 372 to lock. After the pull-out frame 4 is pushed in, the plug 53 is inserted into the plug sleeve 86 to realize electrical connection. The third spring 85 can apply elastic force to the plug sleeve 86, so that the plug sleeve 86 can press against the plug 53 to achieve stable connection and avoid poor contact.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Although this specification describes embodiments, not every embodiment contains only one technical solution. This method of description is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A safety-type withdrawable switchgear, comprising a cabinet (1), characterized in that: The cabinet (1) has several mounting cavities (10) on one side and wiring cavities (14) that match the mounting cavities (10) on the other side. The partitions between the mounting cavities (10) and the wiring cavities (14) are provided with partition openings (16). The cabinet (1) has several pull-out openings (11) on one side that communicate with the interior of the mounting cavities (10). The cabinet (1) has a back door (6) on the other side for closing the wiring cavities (14). Sliding rods (12) are fixedly connected to the four corners of the pull-out openings (11) inside the mounting cavities (10). The four sliding rods (12) are... A pull-out frame (4) is provided in the middle. A through opening (15) is provided at one end of the pull-out frame (4) near the wiring cavity (14). A sliding seat (13) that is slidably connected to the sliding rod (12) is fixedly connected to the upper and lower ends of the pull-out frame (4). A drawer module (5) is provided inside the pull-out frame (4). A busbar assembly (8) that cooperates with the drawer module (5) is provided inside the wiring cavity (14). An operating component (3) for separating the drawer module (5) from the busbar assembly (8) is provided at the bottom of the mounting cavity (10). A safety gate (9) for isolating the busbar assembly (8) is provided inside the wiring cavity (14). The operating component (3) includes a rack (31), which is fixedly connected to the middle of the lower end face of the pull-out frame (4). The mounting cavity (10) located below the pull-out frame (4) is rotatably connected to a rotating shaft (32). A gear (33) is fixedly connected to the rotating shaft (32), and the gear (33) meshes with the rack (31). A hollow step rod (35) is fixedly connected to one end of the rotating shaft (32) that protrudes from the cabinet (1). The cabinet (1) is close to the hollow step rod (35). An arc-shaped strip (36) is fixedly connected at position 35. The center of the arc-shaped strip (36) is concentric with the rotating shaft (32). Limit blocks are fixedly connected to both ends of the arc-shaped strip (36). Locking grooves (34) are provided on the arc-shaped strip (36) near the limit blocks. The stepped surface of the hollow step rod (35) is slidably connected to the inner surface of the arc-shaped strip (36). A positioning lock (37) that cooperates with the locking groove (34) is provided in the hollow step rod (35). The positioning lock (37) includes a pressure rod (373), which is slidably connected inside the hollow step rod (35). The upper end of the pressure rod (373) protrudes from the hollow step rod (35), and the lower end of the pressure rod (373) is fixedly connected to an L-shaped locking rod (371). The upper end of the L-shaped locking rod (371) is slidably connected to the step surface of the hollow step rod (35), and a first spring (372) is installed between the lower end face of the L-shaped locking rod (371) and the lower end face inside the hollow step rod (35).

2. The safety-type withdrawable switchgear according to claim 1, characterized in that, The drawer module (5) includes a drawer box (51), which is slidably connected to the pull-out frame (4). An upper terminal (54) is provided on the upper end of the drawer box (51) near the wiring cavity (14). A lower terminal (52) is provided below the upper terminal (54). A circuit control component (56) electrically connected to the upper terminal (54) and lower terminal (52) is provided inside the drawer box (51). The ends of the upper terminal (54) are all... A plug connector (53) is fixedly connected. A lock hole (58) is provided in the middle of the side of the upper end face of the drawer box (51) away from the plug connector (53). A guide ramp (57) is provided in the position of the drawer box (51) near the lock hole (58). An avoidance groove (55) is provided in the middle of the side of the upper end face of the drawer box (51) near the plug connector (53). A lock assembly (59) is provided at the upper end of the pull-out frame (4) for locking the drawer box (51) in cooperation with the lock hole (58).

3. A safety-type withdrawable switchgear according to claim 2, characterized in that, The locking assembly (59) includes a top block (591), which is fixedly connected to the middle of the upper surface of the pull-out frame (4) away from the opening (15). The top block (591) has an upper slot (593) at its upper end and an inner sliding groove (594) inside. A cross locking rod (595) is slidably connected in the inner sliding groove (594). A pull ring (592) is fixedly connected to one end of the cross locking rod (595) that passes through the upper slot (593). A second spring (596) is installed between the two side blocks of the cross locking rod (595) and the upper surface of the inner sliding groove (594).

4. A safety-type withdrawable switchgear according to claim 2, characterized in that, The busbar assembly (8) includes two insulating plates (84), which are fixedly connected in the wiring cavity (14). Each insulating plate (84) has several T-shaped slide rods (83) that match the position of the plug (53). An insulating sheet (81) is fixedly connected to one end of the T-shaped slide rod (83) near the plug (53). A plug sleeve (86) that engages with the plug (53) is fixedly connected to the insulating sheet (81). A third spring (85) passes through the T-shaped slide rod (83) between the insulating sheet (81) and the insulating plate (84). Each plug sleeve (86) is fixedly connected to a terminal (82).

5. A safety-type withdrawable switchgear according to claim 1, characterized in that, The safety gate (9) includes an insulating horizontal plate (91), which is fixedly connected to the middle of the partition (16). The wiring cavity (14) is provided with insulating gate plates (92) at the positions above and below the partition (16). Vertical sliding grooves (93) are provided at both the upper and lower ends of the partition between the mounting cavity (10) and the wiring cavity (14). A limiting slide (95) is fixedly connected to the side of the insulating gate plate (92) near the mounting cavity (10). The limiting slide (95) is slidably connected to the vertical sliding groove (93). End rollers (97) are rotatably connected to the ends of the limiting slides (95). Inclined push plates (96) are fixedly connected to the upper and lower ends of the pull-out frame (4) at the positions corresponding to the end rollers (97). Tension springs (94) are installed between the insulating gate plate (92) and the insulating horizontal plate (91) on both sides.

6. A safety-type withdrawable switchgear according to claim 3, characterized in that, The upper and lower ends of the pull-out opening (11) are provided with avoidance grooves for avoiding the top block (591) and the rack (31).

7. A safety-type withdrawable switchgear according to claim 1, characterized in that, The back door (6) is provided with a door latch for locking the back door (6).

8. A safety-type withdrawable switchgear according to claim 4, characterized in that, The connector (53) is tapered, and the insertion hole of the connector sleeve (86) is internally tapered. The connector (53) and the connector sleeve (86) are compatible.

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