Draw-out type low-voltage switch cabinet and operation method

Abstract

The invention relates to the technical field of switch cabinets, in particular to a draw-out type low-voltage switch cabinet and an operation method.The draw-out type low-voltage switch cabinet comprises a cabinet body, a plurality of containing cavities are evenly formed in the cabinet body, two connecting sliding rails are symmetrically arranged in the containing cavities, a drawer is connected between the two connecting sliding rails, and a locking mechanism is arranged on the drawer; the locking mechanism comprises a first locking assembly and a second locking assembly. According to the invention, through arrangement of a second locking assembly, a locking bar can be driven to move up and down through movement of a sliding block and a locking rod, when an electric appliance element needs to be replaced, the locking rod is withdrawn, the locking bar is inserted into a limiting notch at the moment, the drawer does not turn over when being pulled out, and after the drawer is completely pulled out, the locking bar moves upwards, so that the electric appliance element is replaced. When the drawer is locked, the drawer is unlocked and turned to be in a vertical state, then the locking strip is moved downwards, the drawer is locked again, at the moment, all the electrical components in the drawer are exposed, and replacement is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of switch cabinets, and in particular to a withdrawable low-voltage switch cabinet and an operating method. Background Art

[0002] The withdrawable low-voltage cabinet is a device responsible for completing the control, protection, conversion and distribution of electric energy in the low-voltage power supply system. It is mainly composed of busbars, components (including disconnectors, circuit breakers, fuses, contactors and thermal relays, etc.), instruments and cabinets. Low-voltage withdrawable switchgear is widely used in power distribution centers PC and motor control centers MCC in power plants, substations, factories, mines and high-rise buildings. It is used as a low-voltage complete distribution device for power distribution, motor centralized control and reactive power compensation in power generation and power supply systems with AC 50-60Hz, rated working voltage of 660V and below, and rated current of 4000A and below.

[0003] When an existing withdrawable low-voltage switch cabinet encounters a fault, it is not convenient to replace the electrical components in the drawer due to the obstruction of the cabinet body. Usually, the drawer needs to be pulled out of the cabinet body for maintenance, which is inconvenient to use. Summary of the invention

[0004] The purpose of the present invention is to provide a withdrawable low-voltage switch cabinet and an operating method to solve the problem in the background art that the switch cabinet needs to remove the drawer when replacing electrical components, which is inconvenient for maintenance. To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A withdrawable low-voltage switch cabinet comprises a cabinet body, wherein a plurality of accommodating cavities are evenly arranged on the cabinet body, two connecting slide rails are symmetrically arranged in the accommodating cavities, a drawer is connected between the two connecting slide rails, a locking mechanism is arranged on the drawer, and the locking mechanism comprises a locking component 1 and a locking component 2, a fixed conductive terminal is also arranged in the accommodating cavity, and a movable conductive terminal corresponding to the position of the fixed conductive terminal is arranged on the drawer.

[0006] Preferably, the connecting slide rail includes a slide rail body, the slide rail body is fixedly connected to the side wall of the accommodating cavity, a pressure block is provided at the end of the slide rail body, a slide groove 1 is provided on the pressure block and the slide rail body, a sliding bar is slidably connected in the slide groove 1, a limiting protrusion is fixedly connected to the slide rail body, a limiting groove is provided on the sliding bar, the limiting protrusion is slidably connected to the limiting groove, and a locking block is rotatably connected to the end of the sliding bar, and the locking block is tightly attached to the side of the pressure block.

[0007] Preferably, two rotating shafts are symmetrically fixedly connected on both sides of the drawer, and the rotating shafts are rotatably connected between the pressure block and the slide rail body. Two limit rods 1 and 2 are also symmetrically fixedly connected on both sides of the drawer. Limit groove 1 and limit groove 2 are provided on the slide rail body, and limit rod 1 abuts against limit groove 1. After the slide rail body rotates 90 degrees, limit rod 2 will abut against limit groove 2.

[0008] Preferably, the locking component 1 includes a rotating handle, which is rotatably connected to the drawer, and a connecting bracket is fixedly connected to the rotating handle. Two sliding grooves 2 are symmetrically provided on the drawer, and two sliders are symmetrically slidably connected in the two sliding grooves 2. A connecting rod is connected between the two sliders and the connecting bracket, and the connecting rod is rotatably connected to the slider and the connecting bracket. A locking rod is fixedly connected to the slider, and two locking holes are symmetrically provided on the side wall of the accommodating cavity, and the locking rod is slidably inserted in the locking hole. Two limit baffles are fixedly connected to the drawer, and the connecting bracket is rotatably connected between the two limit baffles.

[0009] Preferably, the locking assembly second comprises two fixed brackets one, the two fixed brackets one are symmetrically fixedly connected to the drawers, the fixed bracket one is rotatably connected to a cylinder, the cylinder is fixedly connected to a guide rod one and a pulley one, the locking rod is provided with a spiral groove, the guide rod one is slidably connected in the spiral groove on the same side, and the drawer is also symmetrically fixedly connected to two fixed brackets two, the fixed bracket two is rotatably connected to a pulley two, the pulley one and the pulley two on the same side are connected with a belt, the pulley two is fixedly connected to a disk, the disk is provided with an eccentric annular groove, and the drawer is symmetrically slidably connected with two locking strips, the locking strip is fixedly connected to a guide rod two, and the guide rod two is slidably connected in the eccentric annular groove on the same side, and two limiting notches perpendicular to each other are provided on the slide rail body and the pressure block, and the locking strip is opposite to one of the limiting notches.

[0010] Preferably, the fixed conductive terminal includes a connection seat, and a plurality of fixed pole pieces are evenly fixedly connected to the connection seat.

[0011] Preferably, the movable conductive end includes a movable bracket, the movable bracket is slidably connected to the drawer, a movable handle is fixedly connected to the movable bracket, the movable handle is slidably connected to the rotating handle, a spring 1 is connected between the movable handle and the rotating handle, a plurality of through holes corresponding to the positions of fixed pole pieces are opened on the drawer, two elastic pole pieces are fixedly connected to the through holes, a spring 2 is connected between the elastic pole pieces, a plurality of push rods corresponding to the positions of the through holes are fixedly connected to the movable bracket, the push rods abut against the elastic pole pieces, and the elastic pole pieces abut against the corresponding fixed pole pieces.

[0012] An operating method of a withdrawable low-voltage switch cabinet comprises the following steps:

[0013] When the drawer needs to be pulled out, the movable handle and the rotating handle are first squeezed together, and the movable handle drives the push rod fixedly connected thereto to move through the movable bracket. After the push rod moves, it is no longer in contact with the elastic electrode piece. The elastic electrode piece contracts inwardly under the elastic force of the second spring, so that the elastic electrode piece is no longer in contact with the fixed electrode piece, disconnecting the circuit in the drawer, and then the rotating handle is rotated 90 degrees, and the connecting bracket fixedly connected to the rotating handle is also rotated 90 degrees. The connecting bracket pulls the sliders and the locking rods on both sides to contract inwardly through the adjacent connecting rods, so that the locking rods slide out of the locking holes, and the drawer can be pulled out of the accommodating cavity at this time;

[0014] During this process, since the guide rod 1 is slidably connected in the spiral groove, the movement of the locking rod will cause the cylinder to rotate. The rotation of the cylinder drives the disc to rotate 180 degrees through the pulley 1, the belt and the pulley 2. Since the guide rod 2 is slidably connected in the eccentric ring groove, the disc rotates 90 degrees to insert the locking bar into the limit notch, so that the drawer cannot rotate.

[0015] When it is necessary to replace an electrical component in the drawer, first rotate the handle to reset it so that the locking bar moves out of the limiting notch, then rotate the drawer 90 degrees, and then rotate the handle again to insert the locking bar into another limiting notch to lock the drawer. At this time, the drawer opening faces outward, making it convenient to replace electrical components.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, by setting up a locking component 1, the extension and retraction of the locking rod can be controlled by twisting the handle. When the locking rod is inserted into the locking hole, the drawer will be fixed on the cabinet body, ensuring that the drawer will not automatically slide out of the cabinet body when the switch cabinet is in use.

[0018] In the present invention, the locking component 2 is set up, which can drive the locking bar to move up and down through the movement of the slider and the locking rod. When the electrical components need to be replaced, the locking rod is retracted. At this time, the locking bar is inserted into the limiting notch, so that the drawer will not flip over when it is pulled out. When the drawer is fully pulled out, the locking bar is moved up to unlock the drawer and flip the drawer to a vertical state, and then the locking bar is moved down again to lock the drawer again. At this time, all the electrical components in the drawer are exposed, which is convenient for replacement.

[0019] In the present invention, the connecting slide rail is provided, and the locking of the pressing block can be released by rotating the locking block and moving the sliding bar. After the pressing block is removed, the drawer can be removed from the connecting slide rail, making the disassembly and assembly process of the drawer simpler.

[0020] In the present invention, by setting a movable conductive end and a fixed conductive end, after pinching the movable handle and turning the handle, the push rod is moved away from the elastic pole piece, so that the elastic pole piece contracts inwardly under the elastic force of the second spring and separates from the fixed pole piece, ensuring that the drawer is powered off before being pulled out to ensure safety. At the same time, the friction encountered when the drawer is moved out is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the cabinet in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the drawer in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the locking mechanism in the present invention;

[0026] Figure 6 for Figure 4 A local enlarged schematic diagram of the middle A;

[0027] Figure 7 It is a structural schematic diagram of the guide rod 1 in the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the movable conductive terminal in the present invention;

[0029] Fig. 9 for Figure 8 A local enlarged schematic diagram of point B in the middle.

[0030] In the figure: 1, cabinet; 2, accommodating cavity; 3, connecting slide rail; 301, slide rail body; 302, pressure block; 303, slide groove 1; 304, sliding bar; 305, limiting protrusion; 306, limiting groove; 307, locking block; 4, drawer; 401, rotating shaft; 402, limiting rod 1; 403, limiting rod 2; 404, limiting groove 1; 405, limiting groove 2; 406, through hole; 5, locking mechanism; 51, locking component 1; 5101, rotating handle; 5102, connecting bracket; 5103, slide groove 2; 5104, slider; 5105, connecting rod; 5106, locking rod; 5107, limiting baffle; 51 08, spiral groove; 52, locking component two; 5201, fixed bracket one; 5202, cylinder; 5203, guide rod one; 5204, pulley one; 5205, pulley two; 5206, belt; 5207, disk; 5208, eccentric ring groove; 5209, locking strip; 5210, guide rod two; 5211, limiting notch; 5212, fixed bracket two; 6, fixed conductive terminal; 601, connecting seat; 602, fixed pole piece; 7, movable conductive terminal; 701, movable bracket; 702, movable handle; 703, spring one; 704, elastic pole piece; 705, spring two; 706, push rod; 8, locking hole. DETAILED DESCRIPTION

[0031] 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 technical personnel in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 9 , the present invention provides a technical solution:

[0033] A withdrawable low-voltage switch cabinet comprises a cabinet body 1, wherein a plurality of accommodating cavities 2 are evenly arranged on the cabinet body 1, wherein two connecting slide rails 3 are symmetrically arranged in the accommodating cavities 2, wherein a drawer 4 is connected between the two connecting slide rails 3, wherein a locking mechanism 5 is arranged on the drawer 4, wherein the locking mechanism 5 comprises a locking component 1 51 and a locking component 2 52, wherein a fixed conductive terminal 6 is also arranged in the accommodating cavity 2, and wherein a movable conductive terminal 7 corresponding to the position of the fixed conductive terminal 6 is arranged on the drawer 4.

[0034] In this embodiment, the connecting slide rail 3 includes a slide rail body 301, and the slide rail body 301 is fixedly connected to the side wall of the accommodating cavity 2. A pressure block 302 is provided at the end of the slide rail body 301. A slide groove 303 is provided on the pressure block 302 and the slide rail body 301. A sliding bar 304 is slidably connected in the slide groove 303. A limiting protrusion 305 is fixedly connected to the slide rail body 301, and a limiting groove 306 is provided on the sliding bar 304. The limiting protrusion 305 is slidably connected to the limiting groove 306. The end of the sliding bar 304 is rotatably connected with a locking block 307, and the locking block 307 is tightly attached to the side of the pressure block 302.

[0035] In this embodiment, after rotating the locking block 307, the sliding bar 304 can be moved away from above the pressing block 302, and after the sliding bar 304 is moved away, the pressing block 302 can be removed, and after the pressing block 302 is removed, the drawer 4 can be removed from the connecting slide rail 3 as a whole.

[0036] In this embodiment, two rotating shafts 401 are symmetrically fixedly connected on both sides of the drawer 4, and the rotating shafts 401 are rotatably connected between the pressure block 302 and the slide rail body 301. Two limit rods 1 402 and limit rods 2 403 are also symmetrically fixedly connected on both sides of the drawer 4. A limit groove 1 404 and a limit groove 2 405 are provided on the slide rail body 301. The limit rod 1 402 abuts against the limit groove 1 404. After the slide rail body 301 rotates 90 degrees, the limit rod 2 403 will abut against the limit groove 2 405.

[0037] In this embodiment, the limiting rod 402 and the limiting groove 404, the limiting groove 306 and the limiting groove 405 are used to limit the rotation angle of the drawer 4, ensuring that the locking bar 5209 can be aligned with the position of the limiting notch 5211, and ensuring that the rotation angle of the drawer 4 can be carried out normally.

[0038] In this embodiment, the locking component 1 51 includes a rotating handle 5101, which is rotatably connected to the drawer 4, and a connecting bracket 5102 is fixedly connected to the rotating handle 5101. Two sliding grooves 5103 are symmetrically opened on the drawer 4, and two sliders 5104 are symmetrically slidably connected in the two sliding grooves 5103. A connecting rod 5105 is connected between the two sliders 5104 and the connecting bracket 5102, and the connecting rod 5105 is rotatably connected to the sliders 5104 and the connecting bracket 5102. A locking rod 5106 is fixedly connected to the slider 5104, and two locking holes 8 are symmetrically opened on the side wall of the accommodating cavity 2. The locking rod 5106 is slidably inserted in the locking hole 8. Two limit baffles 5107 are fixedly connected to the drawer 4, and the connecting bracket 5102 is rotatably connected between the two limit baffles 5107.

[0039] In this embodiment, the limit baffle 5107 is used to limit the rotation of the connecting bracket 5102, control the rotation range of the rotating handle 5101, and avoid excessive rotation of the rotating handle 5101 causing the device to get stuck.

[0040] In this embodiment, the locking assembly 2 52 includes two fixed brackets 1 5201, and the two fixed brackets 1 5201 are symmetrically fixedly connected to the drawer 4. The fixed bracket 1 5201 is rotatably connected to a cylinder 5202, and the cylinder 5202 is fixedly connected to a guide rod 1 5203 and a pulley 1 5204. The locking rod 5106 is provided with a spiral groove 5108, and the guide rod 1 5203 is slidably connected to the spiral groove 5108 on the same side. The drawer 4 is also symmetrically fixedly connected to two fixed brackets 2 5212, and the fixed bracket 2 5212 is rotatably connected to a pulley 2 5205 , a belt 5206 is connected to the pulley 1 5204 and the pulley 2 5205 on the same side, a disc 5207 is fixedly connected to the pulley 2 5205, an eccentric annular groove 5208 is provided on the disc 5207, two locking strips 5209 are symmetrically slidably connected to the drawer 4, a guide rod 2 5210 is fixedly connected to the locking strip 5209, and the guide rod 2 5210 is slidably connected in the eccentric annular groove 5208 on the same side, two mutually perpendicular limiting notches 5211 are provided on the slide rail body 301 and the pressing block 302, and the locking strip 5209 is opposite to one of the limiting notches 5211.

[0041] In this embodiment, the guide rod 5203 includes a rod body and a rotating ring sleeve, the rod body is fixedly connected to the cylinder 5202, the rotating ring sleeve is rotatably connected to the rod body, and the rotating ring sleeve is also slidably connected in the spiral groove 5108. The rotating ring sleeve can greatly reduce the friction between the guide rod 5203 and the spiral groove 5108, and reduce the resistance received when rotating the handle 5101.

[0042] In this embodiment, the fixed conductive terminal 6 includes a connection base 601 , and a plurality of fixed pole pieces 602 are evenly fixedly connected to the connection base 601 .

[0043] In this embodiment, the movable conductive end 7 includes a movable bracket 701, which is slidably connected to the drawer 4, and a movable handle 702 is fixedly connected to the movable bracket 701. The movable handle 702 is slidably connected to the rotating handle 5101, and a spring 1 703 is connected between the movable handle 702 and the rotating handle 5101. The drawer 4 is provided with a plurality of through holes 406 corresponding to the position of the fixed pole piece 602, and two elastic pole pieces 704 are fixedly connected to the through holes 406, and a spring 2 705 is connected between the elastic pole pieces 704. The movable bracket 701 is fixedly connected with a plurality of push rods 706 corresponding to the position of the through holes 406, and the push rods 706 abut against the elastic pole piece 704, and the elastic pole piece 704 abuts against the corresponding fixed pole piece 602.

[0044] An operating method of a withdrawable low-voltage switch cabinet comprises the following steps:

[0045] When it is necessary to draw out the drawer 4, first pinch the movable handle 702 and the rotating handle 5101 together, and the movable handle 702 drives the push rod 706 fixedly connected thereto to move through the movable bracket 701. After the push rod 706 moves, it is no longer in contact with the elastic electrode piece 704. The elastic electrode piece 704 contracts inwardly under the elastic force of the second spring 705, so that the elastic electrode piece 704 is no longer in contact with the fixed electrode piece 602, disconnecting the circuit in the drawer 4, and then the rotating handle 5101 is rotated 90 degrees, and the connecting bracket 5102 fixedly connected to the rotating handle is also rotated 90 degrees. The connecting bracket 5102 pulls the sliders 5104 and the locking rod 5106 on both sides to contract inwardly through the adjacent connecting rod 5105, so that the locking rod 5106 slides out of the locking hole 8, and the drawer 4 can be drawn out of the accommodating cavity 2 at this time;

[0046] In this process, since the guide rod 1 5203 is slidably connected in the spiral groove 5108, the movement of the locking rod 5106 causes the cylinder 5202 to rotate. The rotation of the cylinder 5202 drives the disc 5207 to rotate 180 degrees through the pulley 1 5204, the belt 5206 and the pulley 2 5205. Since the guide rod 2 5210 is slidably connected in the eccentric annular groove 5208, the disc 5207 rotates 90 degrees to insert the locking strip 5209 into the limiting notch 5211, so that the drawer 4 cannot rotate.

[0047] When it is necessary to replace the electrical components in the drawer 4, first rotate the handle 5101 to reset it so that the locking bar 5209 moves out of the limiting notch 5211, then rotate the drawer 4 90 degrees, and then rotate the handle 5101 again to insert the locking bar 5209 into another limiting notch 5211 to lock the drawer 4. At this time, the drawer 4 is opened outward, which is convenient for replacing electrical components.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A withdrawable low-voltage switch cabinet, comprising a cabinet body (1), characterized in that: The cabinet (1) is evenly provided with a plurality of accommodating cavities (2), two connecting slide rails (3) are symmetrically provided in the accommodating cavities (2), a drawer (4) is connected between the two connecting slide rails (3), a locking mechanism (5) is provided on the drawer (4), the locking mechanism (5) comprises a locking component 1 (51) and a locking component 2 (52), a fixed conductive terminal (6) is also provided in the accommodating cavity (2), and a movable conductive terminal (7) corresponding to the position of the fixed conductive terminal (6) is provided on the drawer (4).

2. A withdrawable low-voltage switch cabinet according to claim 1, characterized in that: The connecting slide rail (3) comprises a slide rail body (301), the slide rail body (301) is fixedly connected to the side wall of the accommodating cavity (2), a pressing block (302) is arranged at the end of the slide rail body (301), a slide groove (303) is provided on the pressing block (302) and the slide rail body (301), a slide bar (304) is slidably connected in the slide groove (303), a limiting protrusion (305) is fixedly connected to the slide rail body (301), a limiting groove (306) is provided on the slide bar (304), the limiting protrusion (305) is slidably connected to the limiting groove (306), and a locking block (307) is rotatably connected to the end of the sliding bar (304), and the locking block (307) is tightly attached to the side of the pressing block (302).

3. A withdrawable low-voltage switch cabinet according to claim 2, characterized in that: Two rotating shafts (401) are symmetrically fixedly connected on both sides of the drawer (4), and the rotating shafts (401) are rotatably connected between the pressure block (302) and the slide rail body (301). Two limiting rods (402) and two limiting rods (403) are also symmetrically fixedly connected on both sides of the drawer (4). A limiting groove (404) and a limiting groove (405) are provided on the slide rail body (301). The limiting rod (402) abuts against the limiting groove (404). After the slide rail body (301) rotates 90 degrees, the limiting rod (403) abuts against the limiting groove (405).

4. A withdrawable low-voltage switch cabinet according to claim 3, characterized in that: The locking assembly (51) comprises a rotating handle (5101), the rotating handle (5101) is rotatably connected to the drawer (4), a connecting bracket (5102) is fixedly connected to the rotating handle (5101), two sliding grooves (5103) are symmetrically opened on the drawer (4), two sliding blocks (5104) are symmetrically slidably connected in the two sliding grooves (5103), and a connecting rod (5105) is connected between the two sliding blocks (5104) and the connecting bracket (5102). ), the connecting rod (5105) is rotatably connected to the slider (5104) and the connecting bracket (5102), the slider (5104) is fixedly connected to a locking rod (5106), two locking holes (8) are symmetrically provided on the side wall of the accommodating cavity (2), the locking rod (5106) is slidably inserted into the locking holes (8), the drawer (4) is fixedly connected to two limit baffles (5107), and the connecting bracket (5102) is rotatably connected between the two limit baffles (5107).

5. A withdrawable low-voltage switch cabinet according to claim 4, characterized in that: The locking assembly 2 (52) comprises two fixed brackets 1 (5201), the two fixed brackets 1 (5201) are symmetrically fixedly connected to the drawer (4), the fixed bracket 1 (5201) is rotatably connected to a cylinder (5202), the cylinder (5202) is fixedly connected to a guide rod 1 (5203) and a pulley 1 (5204), the locking rod (5106) is provided with a spiral groove (5108), the guide rod 1 (5203) is slidably connected to the spiral groove (5108) on the same side, and the drawer (4) is also symmetrically fixedly connected to two fixed brackets 2 (5212), the fixed bracket 2 (5212) is rotatably connected to a pulley 2 (5205), and the cylinder (5202) is fixedly connected to a guide rod 1 (5203) and a pulley 1 (5204) on the same side. The pulley 1 (5204) and the pulley 2 (5205) are connected with a belt (5206), the pulley 2 (5205) is fixedly connected with a disc (5207), the disc (5207) is provided with an eccentric annular groove (5208), the drawer (4) is symmetrically slidably connected with two locking strips (5209), the locking strips (5209) are fixedly connected with a guide rod 2 (5210), the guide rod 2 (5210) is slidably connected in the eccentric annular groove (5208) on the same side, the slide rail body (301) and the pressure block (302) are provided with two mutually perpendicular limiting notches (5211), and the locking strip (5209) is directly opposite to one of the limiting notches (5211).

6. A withdrawable low-voltage switch cabinet according to claim 5, characterized in that: The fixed conductive terminal (6) comprises a connection seat (601), and a plurality of fixed pole pieces (602) are evenly fixedly connected to the connection seat (601).

7. The withdrawable low-voltage switch cabinet according to claim 6, characterized in that: The movable conductive end (7) comprises a movable bracket (701), the movable bracket (701) is slidably connected to the drawer (4), a movable handle (702) is fixedly connected to the movable bracket (701), the movable handle (702) is slidably connected to the rotating handle (5101), a spring (703) is connected between the movable handle (702) and the rotating handle (5101), and the drawer (4) is provided with a plurality of springs (703) connected to the fixed pole pieces (602). The movable bracket (701) is provided with a through hole (406) corresponding to the position of the through hole (406), two elastic pole pieces (704) are fixedly connected to the through hole (406), a spring 2 (705) is connected between the elastic pole pieces (704), a plurality of push rods (706) corresponding to the position of the through hole (406) are fixedly connected to the movable bracket (701), the push rods (706) abut against the elastic pole piece (704), and the elastic pole piece (704) abuts against the corresponding fixed pole piece (602).

8. A method for operating a withdrawable low-voltage switch cabinet, using a withdrawable low-voltage switch cabinet as claimed in any one of claims 1 to 7, characterized in that: The steps include: When the drawer (4) needs to be pulled out, the movable handle (702) and the rotating handle (5101) are first squeezed together, and the movable handle (702) drives the push rod (706) fixedly connected thereto to move through the movable bracket (701). After the push rod (706) moves, it is no longer in contact with the elastic pole piece (704). The elastic pole piece (704) contracts inwardly under the elastic force of the second spring (705), so that the elastic pole piece (704) is no longer in contact with the fixed pole piece (602). The circuit in the drawer (4) is disconnected, and then the rotating handle (5101) is rotated 90 degrees, and the connecting bracket (5102) fixedly connected to the rotating handle is also rotated 90 degrees. The connecting bracket (5102) pulls the sliders (5104) and the locking rod (5106) on both sides inward through the adjacent connecting rods (5105), so that the locking rod (5106) slides out of the locking hole (8), and the drawer (4) can be pulled out of the accommodating cavity (2); During this process, since the guide rod 1 (5203) is slidably connected in the spiral groove (5108), the movement of the locking rod (5106) causes the cylinder (5202) to rotate. The rotation of the cylinder (5202) drives the disc (5207) to rotate 180 degrees through the pulley 1 (5204), the belt (5206) and the pulley 2 (5205). Since the guide rod 2 (5210) is slidably connected in the eccentric annular groove (5208), the rotation of the disc (5207) by 90 degrees causes the locking strip (5209) to be inserted into the limiting notch (5211), so that the drawer (4) cannot rotate. When it is necessary to replace an electrical component in the drawer (4), the handle (5101) is first rotated to reset it so that the locking bar (5209) moves out of the limiting notch (5211), and then the drawer (4) is rotated 90 degrees. Then, the handle (5101) is rotated again so that the locking bar (5209) is inserted into another limiting notch (5211) to lock the drawer (4). At this time, the drawer (4) is opened outward, which facilitates the replacement of electrical components.

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