A withdrawable switch cabinet

Abstract

The present invention discloses a withdrawable switch cabinet, specifically relates to the technical field of switch cabinets, including a cabinet body, a plurality of drawer chambers spaced apart from each other are arranged in the cabinet body, a static contact mounting substrate is arranged at the rear end of each drawer chamber, a drawer is slidably connected in each drawer chamber, and a moving contact mounting substrate is arranged at the rear end of each drawer. The present invention provides a pull-out assembly, on the one hand, when the drawer is inserted into the drawer chamber, a repulsive force is generated between the second electromagnetic part and the permanent magnetic part, which plays a buffering role in the insertion of the drawer, avoiding the collision between the drawer and the cabinet body, and at the same time avoiding excessive force when the contact is inserted, reducing the wear between the contacts, on the other hand, when the drawer is withdrawn from the drawer chamber, the extrusion block is synchronously withdrawn from the limiting slide groove, so that the second electromagnetic part gradually moves upward in the limiting slide groove under the rebound action of the second elastic member, and repulsive force is generated again corresponding to the position of the permanent magnetic part, which plays a boosting role in the withdrawal of the drawer.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and more particularly to a draw-out switch cabinet. Background Art

[0002] Withdrawable switchgear is a kind of equipment widely used in electrical systems. It can be used for both low-voltage circuits and high-voltage circuits. The design of this switchgear allows its internal components, such as circuit breakers and fuses, to be withdrawn or inserted from the cabinet for easy maintenance and replacement. Withdrawable switchgear plays an important role in low-voltage power supply systems, and is mainly responsible for the control, protection, conversion and distribution of electric energy. Its main components include busbars, components (such as disconnectors, circuit breakers, fuses, contactors and thermal relays), instruments and cabinets. This design makes the switchgear highly flexible and maintainable, especially when internal components need to be frequently replaced or repaired, which can significantly improve work efficiency and safety.

[0003] The Chinese patent application number 202410284977.4 discloses a withdrawable switch cabinet, which includes a plurality of drawers and a frame for storing the drawers; a ball retainer, which is arranged between an outer guide rail fixedly connected to the frame and an inner guide rail fixedly connected to the drawer, one end of the ball retainer is connected to a connecting block, one side of the drawer is slidably connected to a connecting plate, a limiter is arranged between the connecting plate and the connecting block, and the limiter enables the connecting block to move synchronously with the connecting plate; a support member, which is used to support the drawer when the ball retainer is separated from the inner and outer guide rails. This invention can solve the technical problem of the difficulty in adding lubricating oil to the slide rails on the switch cabinet in the prior art.

[0004] However, a large force is used in the process of inserting the switch cabinet into the drawer. On the one hand, the drawer may collide with the cabinet body, causing damage to components. On the other hand, the contacts may collide with each other during insertion, causing accelerated wear or even deformation of the contacts. In addition, long-term plugging and unplugging of the switch cabinet drawer will also cause wear of the electrically connected contacts, resulting in insufficient fastening pressure between the contacts, causing poor contact and deteriorating the conductivity between the contacts, thereby affecting the stability and safety of the entire power system.

[0005] The present invention provides a withdrawable switch cabinet, aiming to solve the problem that the contacts of the electrical connection are worn during the plugging and unplugging process of the switch cabinet drawer, thereby causing insufficient fastening pressure between the contacts and affecting the stability and safety of the entire power system. Summary of the invention

[0006] The object of the present invention is to provide a withdrawable switch cabinet to solve the problem proposed in the above background technology that the switch cabinet drawer causes the electrically connected contacts to wear during the plugging and unplugging process, thereby resulting in insufficient fastening pressure between the contacts, affecting the stability and safety of the entire power system.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a withdrawable switch cabinet, comprising a cabinet body, wherein a plurality of drawer chambers spaced apart from each other are arranged in an upper and lower manner, each of the drawer chambers is slidably connected with a drawer, and a moving contact mounting base plate is arranged at the rear end of each of the drawers, and further comprising: a pull-out assembly, wherein the pull-out assembly is respectively arranged on each of the moving contact mounting base plates, and is used for guiding and buffering the drawer during the process of inserting or withdrawing the drawer chamber; a control assembly, wherein the control assembly is respectively arranged on each of the moving contact mounting base plates, and is used for cooperating with the pull-out assembly to control the clamping or loosening of the contact during the process of inserting or withdrawing the drawer chamber;

[0008] The pull-out assembly includes a secondary moving contact fixedly connected to the inner side of the moving contact mounting substrate, two guide columns are fixedly connected to both sides of the secondary moving contact, a static contact mounting substrate is provided at the rear end of each drawer chamber, a secondary static contact corresponding to and adapted to the position of the secondary moving contact is fixedly connected to the side of the static contact mounting substrate away from the drawer, guide holes are provided on both sides of the secondary moving contact, two support columns are fixedly connected to both sides of the secondary moving contact, and two symmetrically arranged conductive elastic sheets are fixedly connected to the outer walls of the two support columns.

[0009] Preferably, the two conductive elastic sheets correspond to the positions of the corresponding guide holes. When the drawer is inserted into the drawer chamber, it can drive the two guide columns to be inserted into the corresponding guide holes, and drive the two guide columns to squeeze the corresponding two conductive elastic sheets, so that the two guide columns can achieve electrical conduction.

[0010] Preferably, the control component includes a moving contact body, which is fixedly connected to the inner side of the moving contact mounting substrate, and a plurality of conductive grooves are evenly arranged at the plug-in end of the moving contact body, and two symmetrically arranged conductive clips are slidably connected in each of the conductive grooves.

[0011] Preferably, an insulating slider is fixedly connected to the outer side of each of the conductive chucks, and the insulating slider is slidably connected in the conductive slide groove. A first elastic member is connected between the sides of the two insulating sliders that are away from each other and the corresponding conductive slide groove. A first electromagnetic part is fixedly embedded in the sides of the two insulating sliders that are close to each other, and the magnetic poles of the two first electromagnetic parts that are close to each other are arranged in a state of opposite attraction, and each of the first electromagnetic parts is electrically connected to the two guide posts.

[0012] Preferably, the left and right sides of the moving contact mounting substrate are fixedly connected with a first mounting box, each of the first mounting boxes is provided with a limiting groove on one side close to the stationary contact mounting substrate, each of the limiting grooves is slidably connected with a second electromagnetic part, a second elastic part is connected between the bottom of each second electromagnetic part and the corresponding limiting groove, each second electromagnetic part is electrically connected to the two guide columns, and a pushing block is fixedly connected to the top of each second electromagnetic part.

[0013] Preferably, two second installation boxes are fixedly connected to a side of the stationary contact installation substrate away from the moving contact installation substrate, and the two second installation boxes correspond to the positions of the two first installation boxes respectively.

[0014] Preferably, each second mounting box is provided with an opening on one side close to the moving contact mounting substrate, and a permanent magnet part is fixedly connected inside each second mounting box, and the magnetic poles of each second electromagnetic part and the corresponding permanent magnet part close to each other are arranged in a like-pole repelling state.

[0015] Preferably, two extrusion blocks are fixedly connected to one side of the static contact mounting substrate close to the moving contact mounting substrate, and the two extrusion blocks respectively correspond to the positions of the two second mounting boxes and are located above the corresponding second mounting boxes, and the bottom of the extrusion block and the top of the pushing block are both provided with wedge-shaped surfaces that can cooperate with each other.

[0016] Preferably, when the extrusion block is inserted into the corresponding limiting groove, it can squeeze the pushing block to drive the second electromagnetic part to move downward in the limiting groove. When the extrusion block is fully inserted into the limiting groove, the second electromagnetic part is located below the permanent magnet part.

[0017] Preferably, a stationary contact corresponding to and matching the position of the moving contact body is fixedly connected to a side of the stationary contact mounting substrate away from the moving contact mounting substrate.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The present invention provides a pull-out assembly. On the one hand, when the drawer is inserted into the drawer chamber, the moving contact mounting substrate drives the two guide posts to insert into the guide holes and squeeze the corresponding two conductive elastic sheets to achieve electrical conduction, so that a repulsive force is generated between the second electromagnetic part and the permanent magnetic part, which has a buffering effect on the insertion of the drawer, avoids the collision between the drawer and the cabinet, and prevents damage to the electronic components in the drawer. At the same time, it can avoid excessive force during contact insertion and reduce wear between the contacts. On the other hand, when the drawer is pulled out of the drawer chamber, the extrusion block is simultaneously pulled out of the limiting slide groove, so that the second electromagnetic part gradually moves upward in the limiting slide groove under the rebound action of the second elastic member, and generates a repulsive force corresponding to the position of the permanent magnetic part again, which helps the drawer to be pulled out.

[0020] 2. The present invention sets a control component so that when the first electromagnetic part is not energized to generate magnetic force, the two conductive chucks in each group are in a state of being away from each other. During the process of inserting or withdrawing the drawer into or out of the drawer chamber, the conductive chucks and the static contacts will not contact and cause wear. Only when the drawer is inserted into the drawer chamber and the two guide columns are electrically conductive, the corresponding conductive chucks approach each other and contact with the corresponding static contacts to complete electrical conduction, thereby preventing the drawer from causing collision between contacts during insertion, further reducing wear between contacts, and thus improving the stability and safety of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of installing a base plate for mounting a stationary contact of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the drawer assembly and the control assembly of the present invention.

[0024] Figure 4 This is a schematic diagram of the installation of the moving contact mounting substrate structure of the present invention.

[0025] Figure 5 This is a schematic diagram of the installation of the stationary contact mounting substrate structure of the present invention.

[0026] Figure 6 It is a schematic diagram of the plug-in connection between the secondary moving contact and the secondary static contact of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the secondary static contact part of the present invention.

[0028] Figure 8 It is a partial structural schematic diagram of the first installation box of the present invention.

[0029] Fig. 9 It is a schematic diagram of the structure of the moving contact body and the stationary contact part of the present invention.

[0030] Fig.10 It is a cross-sectional view of the internal structure of the moving contact body of the present invention.

[0031] Fig.11 It is a partial structural schematic diagram of the conductive chuck of the present invention.

[0032] Fig.12 This is a cross-sectional view of the internal structure of the insulating slider of the present invention.

[0033] The accompanying drawings are marked as follows: 1. cabinet; 11. drawer chamber; 12. static contact mounting substrate; 2. drawer; 21. moving contact mounting substrate; 3. pull-out assembly; 31. secondary moving contact; 32. guide column; 33. secondary static contact; 34. guide hole; 35. support column; 36. conductive elastic sheet; 37. first installation box; 38. limit slide groove; 39. second electromagnetic part; 310. second elastic member; 311. push block; 312. second installation box; 313. permanent magnet part; 314. extrusion block; 4. control assembly; 41. moving contact body; 42. conductive slide groove; 43. conductive chuck; 44. insulating slider; 45. first elastic member; 46. first electromagnetic part; 47. static contact. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] refer to Figure 1-Figure 3 A withdrawable switch cabinet according to an embodiment of the present invention comprises a cabinet body 1, wherein a plurality of drawer chambers 11 spaced apart from each other in an upper and lower direction are arranged in the cabinet body 1, a static contact mounting substrate 12 is arranged at the rear end of each drawer chamber 11, a drawer 2 is slidably connected in each drawer chamber 11, a handle, an instrument, a control panel and a control knob are installed at the front end of the drawer 2, electronic components are installed inside the drawer 2, a moving contact mounting substrate 21 is arranged at the rear end of each drawer 2, and mounting grooves and mounting holes for mounting various workpieces are opened on the static contact mounting substrate 12 and the moving contact mounting substrate 21.

[0037] refer to Figure 3-Figure 7, and also includes a pull-out assembly 3, which is respectively arranged on each moving contact mounting substrate 21, and is used for guiding and buffering the drawer 2 during the process of inserting or withdrawing the drawer chamber 11, including a secondary moving contact 31 fixedly connected to the inner side of the moving contact mounting substrate 21, and two guide columns 32 are fixedly connected to both sides of the secondary moving contact 31, and a secondary static contact 33 corresponding to and adapted to the position of the secondary moving contact 31 is fixedly connected to the side of the static contact mounting substrate 12 away from the drawer 2, and guide holes 34 are opened on both sides of the secondary moving contact 31, and two support columns 35 are fixedly connected to both sides of the secondary moving contact 31, and two symmetrically arranged conductive elastic sheets 36 are fixedly connected to the outer walls of the two support columns 35.

[0038] refer to Figure 6 and Figure 7 The two conductive elastic sheets 36 correspond to the positions of the corresponding guide holes 34. When the drawer 2 is inserted into the drawer chamber 11, it can drive the two guide columns 32 to insert into the corresponding guide holes 34, and drive the two guide columns 32 to squeeze the corresponding two conductive elastic sheets 36, so that the two guide columns 32 can achieve electrical conduction.

[0039] refer to Figure 4 and Figure 8 The left and right sides of the moving contact mounting substrate 21 are fixedly connected with a first mounting box 37, and each first mounting box 37 is provided with a limiting slide groove 38 on one side close to the stationary contact mounting substrate 12. The interior of each limiting slide groove 38 is slidably connected with a second electromagnetic part 39, and a second elastic member 310 is connected between the bottom of each second electromagnetic part 39 and the corresponding limiting slide groove 38. Each second electromagnetic part 39 is electrically connected to the two guide columns 32, and a push block 311 is fixedly connected to the top of each second electromagnetic part 39.

[0040] refer to Figure 5 Two second mounting boxes 312 are fixedly connected to the side of the static contact mounting substrate 12 away from the moving contact mounting substrate 21, and the two second mounting boxes 312 correspond to the positions of the two first mounting boxes 37 respectively. An opening is provided on the side of each second mounting box 312 close to the moving contact mounting substrate 21, and a permanent magnet part 313 is fixedly connected in each second mounting box 312. The magnetic poles of each second electromagnetic part 39 and the corresponding permanent magnet part 313 close to each other are arranged in a state of same-sex repulsion. Two extrusion blocks 314 are fixedly connected to the side of the static contact mounting substrate 12 close to the moving contact mounting substrate 21, and the two extrusion blocks 314 correspond to the positions of the two second mounting boxes 312 respectively, and are located above the corresponding second mounting boxes 312. The bottom of the extrusion block 314 and the top of the push block 311 are provided with wedge-shaped surfaces that can cooperate with each other.

[0041] When the extrusion block 314 is inserted into the corresponding limiting groove 38 , it can squeeze the push block 311 to drive the second electromagnetic part 39 to move downward in the limiting groove 38 . When the extrusion block 314 is fully inserted into the limiting groove 38 , the second electromagnetic part 39 is located below the permanent magnet part 313 .

[0042] During actual use, when the drawer 2 is inserted into the drawer chamber 11, the drawer 2 will drive the moving contact mounting substrate 21 to move toward the static contact mounting substrate 12. During the movement of the moving contact mounting substrate 21, the two guide columns 32 on both sides of the secondary moving contact 31 will be driven to move, and then inserted into the corresponding guide holes 34 for guidance, and the two guide columns 32 will squeeze the corresponding two conductive elastic sheets 36, so that the two guide columns 32 can achieve electrical conduction.

[0043] After the two guide posts 32 are electrically conductive, the two second electromagnetic parts 39 electrically connected thereto will be energized to generate magnetic force, so that repulsive force is generated between the two second electromagnetic parts 39 and the corresponding permanent magnetic parts 313, thereby buffering the drawer 2 during the insertion process and preventing damage caused by a large force when the contacts are inserted.

[0044] In order to prevent the drawer 2 from being fully inserted into the drawer chamber 11 and generating a repulsive force between the second electromagnetic part 39 and the corresponding permanent magnetic part 313 to push the drawer 2 back, or to prevent the drawer 2 from being fully inserted into the drawer chamber 11, the moving contact mounting substrate 21 will synchronously drive the first mounting boxes 37 on both sides to move during the movement. When the extrusion block 314 is inserted into the corresponding limiting slide groove 38, the extrusion block 314 can squeeze the pushing block 311 through the wedge-shaped surface that cooperates with the pushing block 311 to drive the second electromagnetic part 39 to gradually move downward in the limiting slide groove 38 and compress the second elastic member 310. When the contacts are fully plugged in, the extrusion block 314 is also fully inserted into the limiting slide groove 38. At this time, the second electromagnetic part 39 is located below the permanent magnetic part 313, and the repulsive force between the second electromagnetic part 39 and the permanent magnetic part 313 disappears. The drawer 2 can be fully inserted into the drawer chamber 11 and is no longer pushed back by the repulsive force.

[0045] When the drawer 2 is pulled out from the drawer chamber 11, the extrusion block 314 will be simultaneously pulled out from the limiting slide groove 38, so that the second electromagnetic part 39 gradually moves upward in the limiting slide groove 38 under the rebound action of the second elastic member 310, and generates a repulsive force corresponding to the position of the permanent magnet part 313 again, thereby assisting the pulling out of the drawer 2.

[0046] To sum up, through the setting of the pull-out assembly 3, on the one hand, when the drawer 2 is inserted into the drawer chamber 11, the moving contact mounting substrate 21 will drive the two guide columns 32 to insert into the guide holes 34 and squeeze the corresponding two conductive elastic sheets 36 to achieve electrical conduction, so that a repulsive force is generated between the second electromagnetic part 39 and the permanent magnet part 313, which plays a buffering role in the insertion of the drawer 2, avoids the collision between the drawer 2 and the cabinet 1, and prevents the electronic components in the drawer 2 from being damaged. At the same time, it can avoid excessive force during contact insertion and reduce wear between the contacts. On the other hand, when the drawer 2 is pulled out of the drawer chamber 11, the extrusion block 314 will be simultaneously pulled out of the limiting slide groove 38, so that the second electromagnetic part 39 gradually moves upward in the limiting slide groove 38 under the rebound action of the second elastic member 310, and generates a repulsive force corresponding to the position of the permanent magnet part 313 again, which plays a boosting role in the pulling out of the drawer 2.

[0047] Embodiment 2

[0048] In actual use, a large force will be used when the switch cabinet is inserted into the drawer 2, which will cause the contacts to collide with each other during plugging, resulting in accelerated wear or even deformation of the contacts, thereby causing insufficient fastening pressure between the contacts, resulting in poor contact, and deteriorating the conductivity between the contacts, thereby affecting the stability and safety of the entire power system. Therefore, this embodiment improves the device described in the above embodiment.

[0049] refer to Figure 3 and Figure 4 , and also includes a control component 4, which is respectively arranged on each moving contact mounting substrate 21, and is used to cooperate with the pulling component 3 to control the clamping or loosening of the contact when the drawer 2 is inserted into or pulled out of the drawer chamber 11; specifically, the control component 4 includes a moving contact body 41, and the moving contact body 41 is fixedly connected to the inner side of the moving contact mounting substrate 21, and the plug-in end of the moving contact body 41 is evenly provided with a plurality of conductive slide grooves 42, and each conductive slide groove 42 is slidably connected with two symmetrically arranged conductive clamps 43.

[0050] refer to Figure 9-12 An insulating slider 44 is fixedly connected to the outer side of each conductive clamp 43, and the insulating slider 44 is slidably connected in the conductive slide groove 42. A first elastic member 45 is connected between the side of the two insulating sliders 44 that are away from each other and the corresponding conductive slide groove 42. A first electromagnetic part 46 is fixedly embedded on the side of the two insulating sliders 44 that are close to each other, and the magnetic poles of the two first electromagnetic parts 46 that are close to each other are arranged in a state of opposite attraction. Each first electromagnetic part 46 is electrically connected to the two guide pillars 32, and a static contact 47 corresponding to and adapted to the position of the moving contact body 41 is fixedly connected to the side of the static contact mounting substrate 12 that is away from the moving contact mounting substrate 21.

[0051] In actual use, when the first electromagnetic part 46 is not energized and does not generate magnetic force, the two conductive clamps 43 in each group are in a state of being away from each other, and the conductive clamps 43 and the static contacts 47 will not contact and cause wear during the process of inserting or withdrawing the drawer 2 into the drawer chamber 11. Only after the drawer 2 is inserted into the drawer chamber 11 and the two guide columns 32 are electrically conductive, each first electromagnetic part 46 electrically connected thereto will be energized to generate magnetic force, so that suction is generated between the two first electromagnetic parts 46 in each group, thereby driving the corresponding conductive clamps 43 to approach each other and contact with the corresponding static contacts 47 to complete electrical conduction, thereby preventing the drawer 2 from causing collision between contacts during the insertion process, further reducing the wear between contacts, and thus improving the stability and safety of the power system.

[0052] It should be noted that by adjusting the installation position of the conductive elastic sheet 36 and the length of the guide column 32, the timing of the electrical conduction of the two guide columns 32 can be synchronously controlled. When the secondary moving contact 31 and the moving contact body 41 are inserted into the corresponding secondary static contact 33 and the static contact 47 but not fully inserted, the two guide columns 32 are electrically conducted, thereby playing a buffering role while enabling the corresponding two conductive clips 43 to approach each other and contact with the corresponding static contact 47 to complete electrical conduction.

[0053] To sum up, through the setting of the control component 4, when the first electromagnetic part 46 is not energized and no magnetic force is generated, the two conductive clamps 43 in each group are in a state of being away from each other, and during the process of inserting or withdrawing the drawer 2 into the drawer chamber 11, the conductive clamps 43 and the static contacts 47 will not contact and cause wear. Only when the drawer 2 is inserted into the drawer chamber 11 and the two guide columns 32 are electrically conductive, the corresponding conductive clamps 43 approach each other and contact with the corresponding static contacts 47 to complete electrical conduction, thereby preventing the drawer 2 from causing collision between contacts during the insertion process, further reducing the wear between contacts, and thus improving the stability and safety of the power system.

[0054] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A withdrawable switch cabinet, comprising a cabinet body (1), wherein a plurality of drawer chambers (11) are arranged in an upper and lower interval arrangement in the cabinet body (1), a drawer (2) is slidably connected in each of the drawer chambers (11), and a movable contact mounting base plate (21) is arranged at the rear end of each of the drawers (2), characterized in that: Also includes: A drawer assembly (3), the drawer assembly (3) being arranged on each of the movable contact mounting base plates (21) and used for guiding and buffering the drawer (2) during the process of inserting or withdrawing the drawer chamber (11); A control component (4), the control component (4) being respectively arranged on each of the movable contact mounting substrates (21), and being used to cooperate with the drawer component (3) to control the clamping or loosening of the contacts when the drawer (2) is inserted into or withdrawn from the drawer chamber (11); The drawer assembly (3) comprises a secondary moving contact (31) fixedly connected to the inner side of the moving contact mounting substrate (21), two guide pillars (32) are fixedly connected to both sides of the secondary moving contact (31), a static contact mounting substrate (12) is provided at the rear end of each drawer chamber (11), a secondary static contact (33) corresponding to and adapted to the position of the secondary moving contact (31) is fixedly connected to the side of the static contact mounting substrate (12) away from the drawer (2), guide holes (34) corresponding to the positions of the two guide pillars (32) are provided on both sides of the secondary static contact (33), two support pillars (35) are fixedly connected to both sides of the secondary static contact (33), and two symmetrically arranged conductive elastic sheets (36) are fixedly connected to the outer walls of the two support pillars (35); The left and right sides of the movable contact mounting substrate (21) are fixedly connected with a first mounting box (37), a side of each of the first mounting boxes (37) close to the stationary contact mounting substrate (12) is provided with a limiting slide groove (38), the interior of each limiting slide groove (38) is slidably connected with a second electromagnetic part (39), a second elastic member (310) is connected between the bottom of each second electromagnetic part (39) and the corresponding limiting slide groove (38), each second electromagnetic part (39) is electrically connected to the two guide pillars (32), and a push block (311) is fixedly connected to the top of each second electromagnetic part (39); Two second mounting boxes (312) are fixedly connected to a side of the stationary contact mounting substrate (12) away from the movable contact mounting substrate (21), and the two second mounting boxes (312) correspond to positions of the two first mounting boxes (37) respectively; Each second mounting box (312) is provided with an opening on a side close to the moving contact mounting substrate (21), and a permanent magnet portion (313) is fixedly connected inside each second mounting box (312), and the magnetic poles of each second electromagnetic portion (39) and the corresponding permanent magnet portion (313) close to each other are arranged in a state of like polarity repelling each other; Two extrusion blocks (314) are fixedly connected to one side of the stationary contact mounting substrate (12) close to the moving contact mounting substrate (21); the two extrusion blocks (314) respectively correspond to the positions of the two second mounting boxes (312) and are located above the corresponding second mounting boxes (312); the bottom of the extrusion block (314) and the top of the push block (311) are both provided with wedge-shaped surfaces that can cooperate with each other.

2. The withdrawable switch cabinet according to claim 1, characterized in that: The two conductive elastic sheets (36) correspond to the positions of the corresponding guide holes (34). When the drawer (2) is inserted into the drawer chamber (11), it can drive the two guide columns (32) to be inserted into the corresponding guide holes (34), and drive the two guide columns (32) to squeeze the corresponding two conductive elastic sheets (36), so that the two guide columns (32) can achieve electrical conduction.

3. The withdrawable switch cabinet according to claim 2, characterized in that: The control assembly (4) comprises a moving contact body (41), the moving contact body (41) being fixedly connected to the inner side of the moving contact mounting substrate (21), a plurality of conductive slide grooves (42) being evenly arranged at the plug-in end of the moving contact body (41), and two symmetrically arranged conductive clamps (43) being slidably connected in each of the conductive slide grooves (42).

4. The withdrawable switch cabinet according to claim 3, characterized in that: An insulating slider (44) is fixedly connected to the outer side of each conductive chuck (43), and the insulating slider (44) is slidably connected in the conductive slide groove (42). A first elastic member (45) is connected between the sides of the two insulating sliders (44) that are away from each other and the corresponding conductive slide groove (42). A first electromagnetic part (46) is fixedly embedded on the sides of the two insulating sliders (44) that are close to each other, and the magnetic poles of the two first electromagnetic parts (46) that are close to each other are arranged in a state of oppositely attracted states, and each first electromagnetic part (46) is electrically connected to the two guide pillars (32).

5. The withdrawable switch cabinet according to claim 4, characterized in that: When the extrusion block (314) is inserted into the corresponding limiting slide groove (38), it can squeeze the push block (311) to drive the second electromagnetic part (39) to move downward in the limiting slide groove (38); when the extrusion block (314) is completely inserted into the limiting slide groove (38), the second electromagnetic part (39) is located below the permanent magnet part (313).

6. The withdrawable switch cabinet according to claim 5, characterized in that: A stationary contact (47) corresponding to and matching the position of the moving contact body (41) is fixedly connected to a side of the stationary contact mounting substrate (12) away from the moving contact mounting substrate (21).

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