A high voltage switch cabinet

Abstract

The present invention relates to the technical field of switch cabinets, and specifically discloses a high-voltage switch cabinet, including a cabinet body and multiple drawers. The supporting mechanism includes a supporting plate, a telescopic plate group and a locking assembly. The telescopic plate group includes a left end plate hinged on the supporting plate and a right end plate slidably installed on the left end plate. The drawer is installed on the right end plate. When the drawer is pulled out of the cabinet body, the locking assembly first fixes the supporting plate and the cabinet body, and then the telescopic plate group deflects downward. The installation mechanism includes a connecting hook and a positioning assembly. When the drawer is disassembled, the connecting hook is located at the right end of the right end plate, so that most of the drawer is located on the telescopic plate group when the telescopic plate group deflects downward. When the drawer is installed, the connecting hook is moved to the left end of the right end plate, so that a small part of the drawer is located on the telescopic plate group when the telescopic plate group deflects upward. The beneficial effects of the present invention: avoiding collision when the drawer is installed and making the installation process more labor-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and in particular to a high-voltage switch cabinet. Background Art

[0002] Drawer-type high-voltage switchgear is an electrical device used in power systems. It adopts a modular design concept, so that each functional unit can be installed and maintained independently, greatly improving the flexibility and scalability of the equipment. This design method eliminates the need for large-scale modifications to the entire cabinet when the switchgear needs to add or replace functional units, thereby reducing maintenance costs and downtime. Drawers with the same rating and structure have good interchangeability, which means that when the drawer unit needs to be replaced, a suitable replacement can be easily found, reducing the complexity of equipment maintenance.

[0003] A Chinese patent document with announcement number CN113675775B discloses a drawer-type switch cabinet, which includes a cabinet body and a plurality of drawers arranged in the cabinet body. The drawers include a drawer body, a molded case circuit breaker, a third conductive member, a transformer module and a plug-in assembly. The drawer body has a bottom plate, a second panel and a third panel arranged on the front and rear sides of the bottom plate, and two fourth panels arranged on the left and right sides of the bottom plate. The second panel, the third panel and the two fourth panels enclose an installation cavity. The third panel is formed with an opening for the plug-in assembly to extend out of the third panel. The plug-in assembly extends out of the drawer body and is plugged in with the outgoing busbar in the cabinet body. During the specific installation, the drawer is directly inserted into the cabinet body, so that the plug-in assembly is inserted into the outgoing busbar.

[0004] In the above technology, since the height of the switch cabinet is relatively high, it is more laborious for the workers to install the top drawer, and since the line of sight is blocked by the drawer, the specific position of the plug-in component cannot be observed, which easily causes the plug-in component to collide with the cabinet body, causing damage to the plug-in component. Summary of the invention

[0005] The present invention provides a high-voltage switch cabinet, aiming to solve the technical problem in the related art that it is laborious to install the top drawer and the plug-in components are easily collided with the cabinet body, resulting in damage to the plug-in components.

[0006] A high-voltage switch cabinet, comprising a cabinet body and a plurality of drawers, and further comprising:

[0007] The supporting mechanism includes a supporting plate slidably mounted in the cabinet, a telescopic plate group hinged on the right end of the supporting plate, and a locking assembly 1 arranged on the supporting plate for locking the supporting plate. The telescopic plate group includes a left end plate hinged on the supporting plate and a right end plate slidably mounted on the left end plate. The drawer is mounted on the right end plate. When the drawer is pulled out of the cabinet, the locking assembly 1 first fixes the supporting plate and the cabinet, and then the telescopic plate group deflects downward and extends as the drawer moves downward.

[0008] The mounting mechanism includes a connecting hook that is slidably arranged on the right end plate and is engaged with the drawer, and a positioning assembly for controlling the position of the connecting hook. When the drawer is removed, the connecting hook is located at the right end of the right end plate, so that when the telescopic plate group is deflected downward, most of the drawer is located on the telescopic plate group, which is convenient for the drawer to deflect downward. When the drawer is installed, the connecting hook is moved to the left end of the right end plate, and the fixing assembly fixes the connecting hook, so that when the telescopic plate group is deflected upward, a small part of the drawer is located on the telescopic plate group.

[0009] By providing a supporting mechanism, the drawer can be deflected downward only after it is completely pulled out from the cabinet body, thereby preventing the plug-in assembly at the left end of the drawer from colliding with the cabinet body. By providing an installing mechanism, the drawer can be more easily deflected downward after being completely pulled out from the cabinet body. When installing the drawer, the connecting hook is located at the left end of the right end plate, so that after the telescopic plate group is retracted, a small part of the drawer is located on the telescopic plate group, which facilitates the drawer to be deflected upward.

[0010] Preferably, the mounting mechanism also includes a winch wheel arranged on the left end plate and a force storage assembly connected to the winch wheel, a rope is connected to the winch wheel, and the other end of the rope is fixedly connected to the connecting hook. When the rope on the winch wheel is pulled out, the force storage assembly is charged. When the drawer moves downward, the connecting hook is driven to move downward and pull out the rope on the winch wheel. After the connecting hook is detached from the drawer, the winch wheel reverses and drives the connecting hook to move to the left end on the right end plate.

[0011] By arranging a winch wheel and a power storage mechanism connected with the winch wheel, after the connecting hook is separated from the drawer, the connecting hook is automatically moved to the left end on the right end plate.

[0012] Preferably, an intermediate plate is provided between the left end plate and the right end plate, and the intermediate plate and the left end plate and the right end plate are all slidably installed. The intermediate plate is used to increase the distance that the drawer moves downward, and a compression spring three is installed between the connecting hook and the right end plate to make the connecting hook located on the right end of the right end plate.

[0013] By adding an intermediate plate, the distance the drawer can move downward can be increased.

[0014] Preferably, the fixing assembly includes an elastic telescopic block 1 installed at the lower end of the connecting hook, the lower end of the elastic telescopic block 1 is wedge-shaped, and a locking hole 2 matching the elastic telescopic block 1 is opened on the right end plate.

[0015] Preferably, the mounting mechanism further comprises locking assembly 2 and locking assembly 3, and locking assembly 2 and locking assembly 3 are used to respectively lock the sliding of the middle plate on the left end plate and the sliding of the right end plate on the middle plate when the drawer is removed from the connecting hook.

[0016] By providing the locking assembly 2 and the locking assembly 3, the maximum storage energy of the power storage mechanism can be increased, thereby making it easier to push the drawer upward.

[0017] Preferably, the locking assembly 1 includes a connecting rod inserted into the support plate and a locking block installed at the left end of the connecting rod, a spiral groove is provided on the connecting rod, a boss matching the spiral groove is provided on the support plate, a slide groove 2 for sliding the locking block is provided in the cabinet, a limit plate for limiting the rotating connecting rod is provided in the slide groove 2, a torsion spring for resetting the connecting rod is provided between the connecting rod and the support plate, when the drawer is completely pulled out of the cabinet, the locking block is abutted by the right end surface of the second slide groove, so that the connecting rod moves to the left in the support plate, thereby causing the connecting rod to rotate and causing the locking block to deflect and insert into the right side of the limit plate.

[0018] Preferably, a locking hole is provided on the hinge shaft of the left end plate, and the right end of the connecting rod is inserted into the locking hole. When the connecting rod moves to the left in the support plate, the right end of the connecting rod disengages from the locking hole, and the left end plate will deflect downward.

[0019] Preferably, a limit block is provided at the hinge axis of the support plate, and the limit block is used to make the downward deflection angle of the left end plate less than 70°.

[0020] By setting a limit block, the downward deflection angle of the left end plate is less than 70°. Therefore, when the drawer is installed, when the telescopic plate group is fully retracted, most of the drawer is located at the upper left of the left end plate hinge axis, which saves more effort when pushing the drawer to deflect upward.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0022] By providing a supporting mechanism, when the drawer is disassembled, the drawer can only be deflected downward after it is completely pulled out from the cabinet body, thereby preventing the plug-in assembly at the left end of the drawer from colliding with the cabinet body. During the installation of the drawer, when the drawer is deflected, the path passed by the plug-in assembly at the left end of the drawer is fixed, so there will be no collision between the plug-in assembly and the cabinet body. By providing an installation mechanism, after the drawer is completely pulled out from the cabinet body, most of the drawer is located on the telescopic plate group, thereby making it easier to deflect downward. When installing the drawer, the connecting hook is located on the left end of the right end plate, so that after the telescopic plate group is retracted, most of the drawer is located above the hinge axis of the left end plate, thereby facilitating the upward deflection of the drawer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the drawer of the present invention.

[0025] Figure 3It is a structural schematic diagram of the cabinet of the present invention.

[0026] Figure 4 for Figure 3 Enlarged view of point C in the middle.

[0027] Figure 5 It is a structural schematic diagram of the telescopic plate group of the present invention.

[0028] Figure 6 It is a partial cross-sectional view of the mounting mechanism of the present invention.

[0029] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0030] Figure 8 for Figure 6 Enlarged view of point B in the middle.

[0031] Fig. 9 It is a structural schematic diagram of the connecting rod of the present invention.

[0032] Fig.10 It is a structural schematic diagram of the support plate of the present invention.

[0033] Fig.11 It is a structural schematic diagram of the connecting hook of the present invention.

[0034] Fig.12 It is a schematic structural diagram of the fixing assembly of the present invention.

[0035] Fig.13 This is a state diagram of the present invention when the drawer is installed.

[0036] Reference numerals:

[0037] 1. Cabinet; 11. Drawer slot; 12. Slide slot 1; 13. Slide slot 2; 14. Limit plate; 2. Drawer; 21. Plug assembly; 22. Through hole; 3. Support mechanism; 31. Support plate; 32. Telescopic plate group; 321. Left end plate; 322. Middle plate; 323. Right end plate; 324. Locking hole 1; 325. Slide slot 3; 326. Compression spring 2; 327. Locking hole 2; 33. Connecting hook; 34. Locking assembly 1; 341. Connecting Connecting rod; 342, locking block; 343, spiral groove; 344, compression spring one; 35, limit block; 4, mounting mechanism; 41, winding wheel; 42, fixing assembly; 43, locking assembly two; 431, elastic telescopic block two; 432, elastic telescopic block three; 433, elastic telescopic block four; 44, locking assembly three; 441, elastic telescopic block five; 442, elastic telescopic block six; 443, push plate; 444, elastic telescopic rod; 45, torsion spring one. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] like Figure 1-Figure 5 As shown, a high-voltage switch cabinet of the present invention includes a cabinet body 1, a plurality of drawers 2, a supporting mechanism 3 and a mounting mechanism 4. A plurality of drawer grooves 11 for mounting the drawers 2 are provided on the cabinet body 1. The drawers 2 are slidably mounted in the drawer grooves 11. The supporting mechanism 3 is arranged in the drawer grooves 11 for supporting the drawers 2 pulled out outward and limiting the downward deflection angle of the drawer 2 after being pulled out. The mounting mechanism 4 is arranged in the supporting mechanism 3 for storing energy when the drawer 2 falls downward and releasing energy when the drawer 2 is pushed upward, thereby making the installation of the drawer 2 more labor-saving and safer.

[0040] like Figure 1-Figure 2 As shown, the drawer 2 includes a bottom plate, a second panel, a third panel, two fourth panels and a plug-in component 21. The second panel and the third panel are respectively arranged on the left and right sides of the bottom plate, and the two fourth panels are respectively arranged on the front and back sides of the bottom plate. The second panel, the third panel and the two fourth panels are enclosed to form an installation cavity. The plug-in component 21 is installed on the second panel, and the second panel is formed with an opening for the plug-in component 21 to extend out of it. The plug-in component 21 extends out of the drawer 2 body and is plugged in with the output busbar in the cabinet 1. During the specific installation, the drawer 2 is directly inserted into the cabinet 1, so that the plug-in component 21 is inserted into the output busbar.

[0041] like Figure 2-Figure 10As shown in the figure, the support mechanism 3 includes a support plate 31, a telescopic plate group 32, a connecting hook 33, and a first locking component 34. A first sliding groove 12 is formed between the uppermost drawer slot 11 of the cabinet body 1 and the adjacent drawer slot 11 below it. The opening of the first sliding groove 12 is the same as that of the drawer slot 11. The support plate 31 is slidably installed in the first sliding groove 12. The telescopic plate group 32 includes a left end plate 321, a middle plate 322, and a right end plate 323. Both the left end plate 321 and the middle plate 322 are in the shape of "匚". The left end of the left end plate 321 is hinged to the support plate 31. A limiting block 35 is installed at the hinge shaft of the support plate 31. The limiting block 35 is used to make the downward deflection angle of the left end plate 321 less than 70°. Track grooves are formed on the front and rear end faces inside the left end plate 321 and the middle plate 322. Protrusions 1 are installed on the front and rear end faces of the middle plate 322 and the right end plate 323 for sliding in the track grooves. The middle plate 322 is slidably installed inside the left end plate 321, and the openings of the left end plate 321 and the middle plate 322 face the same direction. The right end plate 323 is slidably installed inside the middle plate 322. When the middle plate 322 retracts into the left end plate 321 and the right end plate 323 retracts into the middle plate 322, the telescopic plate group 32 is rectangular as a whole. The connecting hook 33 is installed on the right end plate 323, and the connecting hook 33 is in the shape of "凵". A through hole 22 is formed on the bottom plate of the drawer 2. When connecting, half of the connecting hook 33 passes through the through hole 22, and the side of the through hole 22 is clamped inside the connecting hook 33. The first locking component 34 is arranged on the support plate 31 for locking the movement of the support plate 31 in the left and right directions.

[0042] As Figure 2-Figure 10 shown, the first locking component 34 includes a connecting rod 341 and a locking block 342. An installation groove penetrating from left to right is formed at a position near the front end face of the support plate 31. The connecting rod 341 is inserted into the installation groove, and the left end of the connecting rod 341 extends out of the installation groove. A first locking hole 324 matching the connecting rod 341 is formed on the hinge shaft of the left end plate 321. When the upper and lower end faces of the left end plate 321 and the support plate 31 are in the same plane, the right end of the connecting rod 341 is inserted into the first locking hole 324, thereby restricting the rotation of the left end plate 321. A spiral groove 343 is formed on the connecting rod 341. A protrusion 2 is installed in the installation groove and inserted into the spiral groove 343. When the connecting rod 341 slides in the installation groove, the connecting rod 341 rotates. A first compression spring 344 is sleeved on the connecting rod 341. The two ends of the first compression spring 344 are respectively connected to the connecting rod 341 and the support plate 31. The first compression spring 344 is used to keep the right end of the connecting rod 341 inserted into the locking hole. The locking block 342 is installed at the left end of the connecting rod 341, and the lower end of the locking block 342 extends beyond the lower end face of the support plate 31. A second sliding groove 13 is formed in the left-right direction at the connection of the lower end face and the front end face inside the drawer slot 11. A limiting plate 14 is installed on the front end face inside the drawer slot 11, and the limiting plate 14 is located in the second sliding groove 13.

[0043] When the drawer 2 is pulled to the right, the drawer 2 drives the support plate 31 to slide to the right in the slide groove 12 through the connecting hook 33. When the locking block 342 abuts against the right end surface of the slide groove 13, the support plate 31 continues to move to the right, and the connecting rod 341 slides out of the installation groove to the left relative to the installation groove. Under the action of the spiral groove 343, the connecting rod 341 rotates, and the limit block 35 deflects toward the front and is stuck between the limit plate 14 and the right end surface of the slide groove 13. At this time, the right end of the connecting rod 341 disengages from the left side of the locking hole 1 324, thereby unlocking the left end plate 321, so that the left end plate 321 can be deflected downward.

[0044] like Figure 5-Figure 13 As shown, the mounting mechanism 4 includes a winding wheel 41, a fixing assembly 42, a second locking assembly 43 and a third locking assembly 44. The winding wheel 41 is rotatably mounted on the hinge shaft of the left end plate 321, and the front and rear ends of the winding wheel 41 are connected to the support plate 31 through a torsion spring 1 45. A plurality of turns of rope are wound around the winding wheel 41, one end of the rope is fixedly connected to the winding wheel 41, and the other end is fixedly connected to the connecting hook 33. A sliding groove 325 is provided on the right end plate 323, and the connecting hook 33 is slidably mounted in the sliding groove 325 along the left and right directions. A compression spring 2 326 is installed between the connecting hook 33 and the sliding groove 325, and the compression spring 2 326 is used to make the connecting hook 33 located at the rightmost end of the sliding groove 325. A locking hole 2 327 is provided on the bottom surface of the sliding groove 325 near the left end. The fixing assembly 42 includes a locking hole 2 327 installed on the bottom surface of the connecting hook 33 and extending downward. When the right end plate 323 slides on the middle plate 322 to the right end of the middle plate 322, the locking assembly 34 is used to lock the sliding of the right end plate 323 on the middle plate 322, and the telescopic plate group 32 is in the expanded state.

[0045] When the left end plate 321 is deflected downward, the drawer 2 uses gravity to drive the right end plate 323 to move to the lower right through the connecting hook 33, thereby driving the middle plate 322 to move and pulling the rope out from the winding wheel 41, thereby driving the winding wheel 41 to rotate and storing force for the torsion spring 1 45. When the telescopic plate group 32 is unfolded, the drawer 2 is taken down from the connecting hook 33, and the torsion spring 1 45 is released to drive the connecting hook 33 to move in the slide groove 325 to the leftmost end of the slide groove 325, and the elastic telescopic block 1 extends out and passes through the locking hole 2 327.

[0046] like Figure 5-Figure 8 As shown, the locking assembly 2 43 includes an elastic telescopic block 2 431, an elastic telescopic block 3 432 and an elastic telescopic block 4 433. The elastic telescopic block 2 431 is installed at the rightmost end of the track groove on the left end plate 321. The elastic telescopic block 2 431 is telescopic in the front-to-back direction. A locking hole 3 is provided on the front end surface of the middle plate 322. The left end surface of the elastic telescopic block 2 431 is an inclined surface, and the right end surface is perpendicular to the front end surface of the middle plate 322. The elastic telescopic block 3 432 that is telescopic in the front-to-back direction is installed in the locking hole 3. When the middle plate 322 slides to the rightmost end on the left end plate 321, the elastic telescopic block 2 431 extends backward in the track groove of the left end plate 321 and is inserted into the locking hole 3. The elastic telescopic block 2 431 The elastic telescopic block three 432 in the locking hole three is pushed backward to complete the locking of the middle plate 322. The elastic telescopic block four 433 that telescopes in the left-right direction is installed on the right side of the elastic telescopic block three 432, and the right end of the elastic telescopic block four 433 is located on the inner side of the middle plate 322. The elastic telescopic block three 432 is provided with a guide surface that abuts against the left end of the elastic telescopic block four 433. When the right end plate 323 is retracted into the middle plate 322, it presses the right end of the elastic telescopic block four 433, so that the elastic telescopic block four 433 is pressed against the guide surface, and then the elastic telescopic block three 432 moves forward, so that the elastic telescopic block two 431 is pushed out from the locking hole three, and then the middle plate 322 is unlocked.

[0047] like Figure 5-Figure 8As shown, the locking assembly three 44 includes an elastic telescopic block five 441, an elastic telescopic block six 442 and a push plate 443. The elastic telescopic block five 441 is installed at the rightmost end of the track groove on the middle plate 322. The elastic telescopic block five 441 is telescopic in the front-to-back direction. A locking hole four is provided on the front end surface of the right end plate 323. The left end surface of the elastic telescopic block five 441 is an inclined surface, and the right end surface is perpendicular to the front end surface of the right end plate 323. The elastic telescopic block six 442 that telescopes in the front-to-back direction is installed in the locking hole four. When the right end plate 323 slides to the rightmost end on the middle plate 322, the elastic telescopic block five 441 extends backward in the track groove of the middle plate 322 and is inserted into the locking hole four. The elastic telescopic block five The cam 326 is provided with a plurality of springs which are respectively provided on the top and bottom of the cam 327 and the top and bottom of the cam 328. The cam 326 is provided with a plurality of springs which are respectively provided on the top and bottom of the cam 328. The cam 326 is provided with a plurality of springs which are respectively provided on the top and bottom of the cam 328.

[0048] When the left end plate 321 is deflected downward, the side of the through hole 22 on the drawer 2 first presses on the hinge shaft of the push plate 443, so that the rear end of the push plate 443 moves to the right and abuts against the inner side of the connecting hook 33. At this time, the front end of the push plate 443 exceeds the front end surface of the connecting hook 33. When the telescopic plate group 32 is fully unfolded and the drawer 2 is removed from the connecting hook 33, the connecting hook 33 moves to the left in the slide groove 325 under the pull of the rope. In this process, the part of the push plate 443 extending from the connecting hook 33 presses against the right end of the elastic telescopic rod 444. , and compress it. When the drawer 2 is removed, the push plate 443 is reset under the action of the compression spring three and the torsion spring two, so that the push plate 443 is retracted into the connecting hook 33. At this time, the elastic telescopic rod 444 is reset. When the drawer 2 is placed on the connecting hook 33 again, the front end of the push plate 443 exceeds the front end surface of the connecting hook 33 again, and pushes the elastic telescopic rod 444 to move forward, thereby driving the elastic telescopic block six 442 to move forward, and then the elastic telescopic block five 441 withdraws from the locking hole four, completing the unlocking of the right end plate 323.

[0049] The specific working principle of the present invention is:

[0050] When the drawer 2 is pulled right, the drawer 2 drives the support plate 31 to slide to the right in the slide groove 12 through the connecting hook 33. When the locking block 342 abuts against the right end surface of the groove of the second slide groove 13, the support plate 31 continues to move to the right. The connecting rod 341 slides out of the installation groove relative to the installation groove to the left under the action of the spiral groove 343. The connecting rod 341 rotates, and the limit block 35 deflects toward the front and is stuck between the limit plate 14 and the right end surface of the groove of the second slide groove 13. At this time, the right end of the connecting rod 341 extends to the left from the locking hole, so that the left end plate 321 can deflect downward The drawer 2 then moves to the left of the drawer 2 and the left end plate 321 is unlocked, and the drawer 2 can then move to the left of the drawer 2. The drawer 2 then moves to the right of the drawer 2 and the left end plate 321 is unlocked.

[0051] When the drawer 2 is placed on the connecting hook 33, the front end of the pushing plate 443 exceeds the front end surface of the connecting hook 33 again and pushes the elastic telescopic rod 444 to move forward, thereby driving the elastic telescopic block six 442 to move forward, and then the elastic telescopic block five 441 withdraws from the locking hole four, completing the unlocking of the right end plate 323. When the right end plate 323 is retracted into the middle plate 322, the elastic telescopic block four 433 presses on the guide surface to make the elastic telescopic block four 433 move forward, thereby pushing the elastic telescopic block two 431 out of the locking hole three, and then unlocking the middle plate 322. When the drawer 2 is pushed to move, the bottom end of the third panel of the drawer 2 pushes the right end plate 323 to move. When the middle plate 322 is retracted into the left end plate 321, since the connecting hook 33 is located at the right The left end of the slide groove 325 on the end plate 323, at this time, the part of the drawer 2 located above the hinge axis of the left end plate 321 is larger than the part located below the hinge axis of the left end plate 321, and because the downward deflection angle of the left end plate 321 is less than 70°, most of the drawer 2 is located at the upper left of the hinge axis of the left end plate 321, which makes it easier to push the drawer 2 to deflect. At the same time, since the support plate 31 is locked by the locking block 342, when the drawer 2 deflects, the path of the plug-in component 21 at the left end of the drawer 2 is fixed, so there will be no collision between the plug-in component 21 and the cabinet body 1. When the drawer 2 rotates to the horizontal, the connecting rod 341 is reset under the action of the compression spring 344 and is inserted into the locking hole 324 again, and finally the drawer 2 is pushed to the left into the drawer groove 11.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high-voltage switch cabinet, comprising a cabinet body and a plurality of drawers, characterized in that: Also includes: The supporting mechanism includes a supporting plate slidably mounted in the cabinet, a telescopic plate group hinged on the right end of the supporting plate, and a locking assembly 1 arranged on the supporting plate for locking the supporting plate. The telescopic plate group includes a left end plate hinged on the supporting plate and a right end plate slidably mounted on the left end plate. The drawer is mounted on the right end plate. When the drawer is pulled out of the cabinet, the locking assembly 1 first fixes the supporting plate and the cabinet, and then the telescopic plate group deflects downward and extends as the drawer moves downward. The mounting mechanism includes a connecting hook that is slidably arranged on the right end plate and is engaged with the drawer, and a positioning assembly for controlling the position of the connecting hook. When the drawer is removed, the connecting hook is located at the right end of the right end plate, so that when the telescopic plate group is deflected downward, most of the drawer is located on the telescopic plate group, which is convenient for the drawer to deflect downward. When the drawer is installed, the connecting hook is moved to the left end of the right end plate, and the fixing assembly fixes the connecting hook, so that when the telescopic plate group is deflected upward, a small part of the drawer is located on the telescopic plate group.

2. A high voltage switch cabinet according to claim 1, characterized in that: The mounting mechanism also includes a winding wheel arranged on the left end plate and a force storage component connected to the winding wheel. A rope is connected to the winding wheel, and the other end of the rope is fixedly connected to the connecting hook. When the rope on the winding wheel is pulled out, the force storage component stores force. When the drawer moves downward, the connecting hook is driven to move downward and pull out the rope on the winding wheel. After the connecting hook is detached from the drawer, the winding wheel reverses and drives the connecting hook to move to the left end on the right end plate.

3. A high voltage switch cabinet according to claim 2, characterized in that: An intermediate plate is also arranged between the left end plate and the right end plate, and the intermediate plate and the left end plate and the right end plate are all slidably installed. The intermediate plate is used to increase the distance the drawer moves downward, and a compression spring three is installed between the connecting hook and the right end plate to make the connecting hook located on the right end of the right end plate.

4. A high voltage switch cabinet according to claim 3, characterized in that: The fixing assembly comprises an elastic telescopic block 1 installed at the lower end of the connecting hook, the lower end of the elastic telescopic block 1 is wedge-shaped, and a locking hole 2 matching with the elastic telescopic block 1 is provided on the right end plate.

5. A high voltage switch cabinet according to claim 4, characterized in that: The mounting mechanism also includes locking assembly 2 and locking assembly 3, which are used to respectively lock the sliding of the middle plate on the left end plate and the sliding of the right end plate on the middle plate when the drawer is removed from the connecting hook.

6. A high voltage switch cabinet according to claim 1, characterized in that: The locking assembly 1 includes a connecting rod inserted in the support plate and a locking block installed at the left end of the connecting rod. A spiral groove is provided on the connecting rod, and a boss matching the spiral groove is provided on the support plate. A second slide groove for sliding the locking block is provided in the cabinet body, and a limit plate for limiting the rotating connecting rod is provided in the second slide groove. A torsion spring for resetting the connecting rod is provided between the connecting rod and the support plate. When the drawer is completely pulled out of the cabinet body, the locking block is abutted by the right end surface of the second slide groove, so that the connecting rod moves to the left in the support plate, thereby causing the connecting rod to rotate and causing the locking block to deflect and insert into the right side of the limit plate.

7. A high voltage switch cabinet according to claim 6, characterized in that: A locking hole 1 is provided on the hinge shaft of the left end plate, and the right end of the connecting rod is inserted into the locking hole 1. When the connecting rod moves leftward in the support plate, the right end of the connecting rod disengages from the locking hole 1, and the left end plate will deflect downward.

8. A high voltage switch cabinet according to claim 1, characterized in that: A limit block is arranged at the hinge axis of the support plate, and the limit block is used to make the downward deflection angle of the left end plate less than 70°.

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