High-low voltage switchgear

Abstract

This invention belongs to the technical field of high and low voltage switchgear assemblies, and particularly relates to a high and low voltage switchgear assembly, comprising a side-block assembly, an electrical structure assembly, a cabinet bottom assembly, and a cabinet top assembly. The side-block assembly serves as the two side walls of the cabinet, the electrical structure assembly serves as the rear wall of the cabinet and for mounting electrical components inside the cabinet, the cabinet bottom assembly serves as the bottom of the cabinet, and the cabinet top assembly serves as the top of the cabinet. The heat dissipation structure distributed in the electrical mounting assembly and the cabinet bottom assembly can dissipate heat from the electrical components mounted in the electrical mounting housing within the cabinet, effectively reducing the temperature rise inside the cabinet and providing timely and continuous heat dissipation for the electrical components, protecting them from damage due to excessive temperature.

Description

Technical Field

[0001] This invention belongs to the technical field of high and low voltage switchgear, and particularly relates to a high and low voltage switchgear assembly. Background Technology

[0002] High and low voltage switchgear refers to a complete power distribution system composed of high-voltage switchgear, low-voltage distribution cabinets / control cabinets, and related auxiliary equipment, realizing full-link power management from "high-voltage power reception → transformer step-down → low-voltage power distribution → load power supply". Specifically: high-voltage switchgear is used for voltage levels from 1kV to 40.5kV, and its core functions are power reception, distribution, and protection of high-voltage equipment (such as transformers and high-voltage motors); low-voltage switchgear is used for voltage levels of 0.4kV and below, and its core functions are low-voltage power distribution, load control (such as motors, lighting, and power equipment), and system protection (overload, short circuit, and leakage).

[0003] Existing high and low voltage switchgear has explosion-proof and heat dissipation structures, but these structures still have the following shortcomings:

[0004] 1. Existing explosion-proof structures will be damaged to some extent after weakening and buffering the explosion when the switchgear explodes. Most of the damaged explosion-proof structures cannot be replaced to ensure that the entire switchgear can continue to be used, which restricts the continued use of the entire switchgear.

[0005] 2. Most existing heat dissipation structures only dissipate heat from the space inside the cabinet that is heated by electrical components, rather than indirectly dissipating heat from the electrical components themselves. While this provides some heat dissipation, it fails to effectively protect the electrical components inside the cabinet.

[0006] 3. Most existing switchgear has a non-modular design for its explosion-proof and heat dissipation structures. Therefore, when the explosion-proof and heat dissipation structures fail, they cannot be replaced in a timely manner, causing the entire switchgear to malfunction and increasing the maintenance cost of the switchgear.

[0007] 4. Most existing switch cabinets are generally transported after being fully assembled at the factory. Fully assembled switch cabinets require more transportation space and are easily deformed and damaged due to compression. If they are disassembled and then transported and reassembled at the user's hands, the electrical components in the disassembled switch cabinets are very easy to be damaged by bumps during transportation.

[0008] This invention designs a high- and low-voltage switchgear to solve the above problems. Summary of the Invention

[0009] Based on this, it is necessary to address the existing problems of current high and low voltage switchgear and provide a high and low voltage switchgear assembly. The modular design of the cabinet top assembly can guide the pressure upward in the event of an explosion inside the cabinet, protecting nearby personnel from injury. The modular design of the side baffle assembly and cabinet bottom assembly in this invention can effectively reduce the maintenance cost of partial damage to the cabinet. The heat dissipation structure set in the electrical installation assembly and cabinet bottom assembly can accurately dissipate heat directly to the electrical components inside the cabinet, effectively controlling the temperature rise inside the cabinet and protecting the electrical components from damage due to excessive temperature.

[0010] The above objectives are achieved through the following technical solutions:

[0011] A high- and low-voltage switchgear assembly for power distribution, control, and protection, comprising:

[0012] Two side-block assemblies are used as two side walls of the cabinet, and a cabinet door that is hinged to one of the side-block assemblies is openable from the front of the cabinet.

[0013] An electrical structural assembly that plugs into the side panel assembly is used as the rear wall of the cabinet and for installing electrical components inside the cabinet. The electrical structural assembly includes an electrical mounting shell with a front opening for installing electrical components. The rear end of the electrical mounting shell is provided with three first connecting rods that plug into the side panel assembly. A back plate is bolted to the first connecting rod to close the rear side of the cabinet and to close the front opening of the electrical mounting shell during transportation. A heat exchange assembly for heat exchange and cooling of the electrical components is provided inside the electrical mounting shell.

[0014] The cabinet bottom assembly, which is inserted and cooperates with the side panel assembly, is used as the bottom of the cabinet. The cabinet bottom assembly has the structural feature of circulating cooling for the heat exchange assembly.

[0015] The cabinet top assembly, which is inserted and matched with the side baffle assembly, is used as the top of the cabinet. The cabinet top assembly has the structural feature of upward explosion-proof pressure relief in case of an explosion inside the cabinet.

[0016] In one embodiment, the cabinet bottom assembly includes a cubic bottom shell, in which a compressor and a heat exchanger are disposed. The compressor and the heat exchanger are connected by a connecting pipe. The compressor and the heat exchanger are respectively provided with a first inlet pipe and a first outlet pipe connected to the heat exchange component in the electrical structure assembly. A replenishment pipe is provided on the connecting pipe, and the end of the replenishment pipe is provided with a replenishment component for automatically replenishing the working fluid in the first inlet pipe and the first outlet pipe.

[0017] In one embodiment, the fluid replenishment assembly includes a fluid replenishment cylinder that communicates with a fluid replenishment tube and is disposed in a receiving groove on the bottom shell. The end of the fluid replenishment cylinder has an air hole. A sliding plug slides in the fluid replenishment cylinder. A guide rod is disposed on the sliding plug. The guide rod slides in a first guide sleeve at the end of the fluid replenishment cylinder. A plurality of locking blocks that cooperate with the guide rod are disposed circumferentially at the end of the first guide sleeve. A first locking nut is threadedly connected to the first guide sleeve to press the locking blocks against the guide rod.

[0018] In one embodiment, the cabinet top assembly includes a cubic top shell, inside which is provided an explosion-proof pressure relief layer of porous ceramic material. A pressure relief groove is provided on the lower side of the explosion-proof pressure relief layer. Several circular holes opposite to the pressure relief groove are provided on the bottom of the top shell. A pressure-sensitive membrane is provided in the circular holes. Pressure relief windows are provided on both sides of the top shell.

[0019] In one embodiment, the cabinet top assembly includes a cubic top shell with an upper opening. A cover plate that opens and closes from the rear of the cabinet is hinged to the upper opening of the top shell. Two third springs are connected between the cover plate and the top shell to close the upper opening of the top shell. A first pressure relief grille is provided on the lower side of the top shell. A baffle that opens and closes the first pressure relief grille from the rear is hinged to the bottom inside the top shell. A second pressure relief grille is provided on the baffle. Two locking assemblies are symmetrically arranged between the top cover and the baffle. Under normal circumstances, the cover plate is locked in the closed state. In the event of an explosion inside the cabinet, the closed cover plate is unlocked by the swinging of the baffle.

[0020] In one embodiment, the locking assembly includes a rod sleeve hinged within the top shell, with a first connecting rod and a second connecting rod slidably disposed at both ends of the rod sleeve. The end of the first connecting rod is hinged to a fixed rod fixed to a baffle plate. A second spring is connected between the fixed rod and the bottom of the top shell to close the first pressure relief grille of the baffle plate. The end of the second connecting rod is hinged to one end of a V-rod hinged within the top shell. The other end of the V-rod is provided with a first locking hook, which engages with a second locking hook on the cover plate.

[0021] In one embodiment, the side panel assembly includes a square frame. The upper and lower ends of the square frame are respectively provided with two first plugs that mate with a third slot on the top shell and two first plugs that mate with a first slot on the bottom shell. A round-headed locking pin that mates with a first locking hole on the first slot or a second locking hole on the second slot is slidably disposed in a circular groove on the first plug. A first spring that resets the corresponding round-headed locking pin is disposed in the circular groove. A side panel serving as a cabinet side wall is disposed on the square frame.

[0022] In one embodiment, the heat exchange assembly includes a plurality of first heat exchange tubes distributed near electrical components. A second heat exchange tube with an annular space is disposed on the outer side of the first heat exchange tubes. The second heat exchange tube is filled with paraffin wax. Both ends of all the first heat exchange tubes are respectively connected to a second liquid inlet pipe and a second liquid outlet pipe. The second liquid inlet pipe and the second liquid outlet pipe are respectively connected to the first liquid outlet pipe and the first liquid inlet pipe through a connecting assembly. Two vertical exhaust pipes are disposed on the upper side wall of both ends of the uppermost first heat exchange tube. The ends of the exhaust pipes are provided with sealing caps.

[0023] In one embodiment, two second plugs are provided at both ends of the first connecting rod, and the second plugs are inserted into the second slots on the corresponding side frame. Two second connecting rods are symmetrically arranged at the front end of the electrical mounting housing.

[0024] In one embodiment, the connecting assembly includes a first pipe head disposed at the end of a first inlet pipe or a first outlet pipe and a second pipe head disposed at the end of a first inlet pipe or a second outlet pipe. The end of the first pipe head is provided with a sealing gasket that seals with the end of the second pipe head. The end of the second pipe head is provided with a limiting ring. A second locking sleeve that is threadedly engaged with the first pipe head is fitted onto the second pipe head. The sealing gasket is engaged between the second locking sleeve and the limiting ring. A second guide sleeve and a third guide sleeve are respectively disposed on the pipe walls of the first pipe head and the second pipe head. A first plug and a second plug are slidably disposed in the second guide sleeve and the third guide sleeve, respectively. The ends of the second guide sleeve and the third guide sleeve are respectively threadedly connected to a first screw that is rotatably connected to the first plug and a second screw that is rotatably connected to the second plug. The ends of the first screw and the second screw are provided with internal hexagonal grooves that engage with hexagonal handles.

[0025] The beneficial effects of this invention are:

[0026] 1. The cabinet top assembly in this invention adopts a modular design and has an explosion-proof function with upward pressure relief. After the top assembly completes the explosion-proof pressure relief for an explosion occurring inside the cabinet, it can be replaced if damaged. This ensures that the cabinet can continue to be used even if the top assembly is damaged, without the need to replace or repair the entire cabinet, thus avoiding injury to personnel and effectively reducing maintenance costs due to damage to the top assembly. The detachable structure of the two side panel assemblies and the modular structure of the bottom assembly in this invention allow for timely replacement of damaged sections, also effectively reducing maintenance costs due to partial damage to the cabinet.

[0027] 2. The heat dissipation structure distributed in the electrical installation assembly and the cabinet bottom assembly in this invention can dissipate heat from the electrical components installed in the electrical installation shell inside the cabinet, effectively reducing the temperature rise inside the cabinet and providing timely and continuous heat dissipation for the electrical components, protecting them from damage due to excessive temperature.

[0028] 3. The side panel assembly, cabinet bottom assembly, cabinet top assembly, and electrical installation assembly in this invention adopt a disassembled or modular design, which makes it easy to occupy less space during transportation and improve transportation efficiency. At the same time, the back plate in the electrical installation assembly can be sealed with bolts to the electrical installation shell during transportation, thereby protecting the electrical components in the electrical installation shell from being damaged by bumps during transportation.

[0029] 5. The heat dissipation structure set in the cabinet bottom assembly and electrical installation assembly of the present invention can be flexibly disassembled and assembled, and no working fluid leakage will occur during the disassembly and assembly process. It can also automatically replenish the working fluid lost in the heat dissipation structure at any time, ensuring that the heat dissipation structure can continuously and effectively dissipate heat from electrical components. Attached Figure Description

[0030] Figure 1 These are two overall schematic diagrams of the present invention;

[0031] Figure 2 This is the first sectional view of the present invention;

[0032] Figure 3 This is a second sectional view of the present invention;

[0033] Figure 4 It is a sectional view of the cabinet bottom assembly and side panel assembly in conjunction with the cabinet top assembly and side panel assembly;

[0034] Figure 5 This is a cross-sectional view of the first heat exchange tube and the second heat exchange tube in operation;

[0035] Figure 6 It is a sectional view of the cabinet bottom components;

[0036] Figure 7 This is a cross-sectional view of the fluid replenishment assembly;

[0037] Figure 8 This is a cross-sectional view of the connecting components;

[0038] Figure 9 This is the first design of the cabinet top component and its sectional view;

[0039] Figure 10 This is a schematic diagram of the second option for the cabinet top component;

[0040] Figure 11 This is a sectional view of the second design for the cabinet top component;

[0041] Figure 12 This is a cross-sectional view of the lock component;

[0042] Figure 13 This is a schematic diagram of the side guard assembly;

[0043] Figure 14This is a cross-sectional view of the first plug;

[0044] Figure 15 It is an electrical structure component and its cross-sectional view;

[0045] Figure 16 This is a cross-sectional view of the back panel enclosure for electrical mounting within an electrical structural component.

[0046] Labels in the diagram:

[0047] 100. Cabinet bottom assembly; 101. Bottom shell; 102. First slot; 103. First lock hole; 104. Receiving groove; 105. Compressor; 106. Heat exchanger; 107. Connecting pipe; 108. Liquid replenishment pipe; 109. Liquid replenishment assembly; 110. Liquid replenishment cylinder; 111. Vent; 112. First guide sleeve; 113. Locking block; 114. First locking screw sleeve; 115. Sliding plug; 116. Guide rod; 117. First liquid outlet pipe; 118. First liquid inlet pipe;

[0048] 200. Side guard assembly; 201. Square frame; 202. Second slot; 203. First plug; 204. Round head locking pin; 205. First spring; 206. Side plate;

[0049] 300. Electrical structural assembly; 301. Electrical mounting housing; 302. First connecting rod; 303. Second connecting rod; 304. Back plate; 305. Electrical component; 306. First heat exchange tube; 307. Exhaust pipe; 308. Sealing cap; 309. Second heat exchange tube; 310. Paraffin-based; 311. Second liquid inlet pipe; 312. Second liquid outlet pipe; 313. Second plug; 314. Heat exchange assembly;

[0050] 400. Connecting assembly; 401. First pipe end; 402. Second guide sleeve; 403. First plug; 404. First screw; 405. Sealing gasket; 406. Second pipe end; 407. Limiting ring platform; 408. Third guide sleeve; 409. Second plug; 410. Second screw; 411. Second locking screw sleeve;

[0051] 500. Cabinet top assembly; 501. Top shell; 502. Third slot; 503. Second lock hole; 504. Pressure relief window; 505. Explosion-proof pressure relief layer; 506. Pressure relief groove; 507. Pressure-sensitive membrane; 508. First pressure relief grille; 509. Cover plate; 510. Baffle; 511. Second pressure relief grille; 512. Lock assembly; 513. Fixing rod; 514. Second spring; 515. First connecting rod; 516. Rod sleeve; 517. Second connecting rod; 518. V-bar; 519. First lock hook; 520. Second lock hook; 521. Third spring;

[0052] 601. Cabinet door. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0054] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] like Figures 1-16 As shown, a high- and low-voltage switchgear assembly for power distribution, control, and protection includes:

[0057] Two side-block assemblies 200 are used as two side walls of the cabinet, and a cabinet door 601 that is hinged to one of the side-block assemblies 200 is openable and closed on the front side of the cabinet.

[0058] An electrical structure assembly 300, which is plugged into the side baffle assembly 200, is used as the rear wall of the cabinet and for installing electrical components 305 inside the cabinet. The electrical structure assembly 300 includes an electrical mounting shell 301 with a front opening for installing electrical components 305. The rear end of the electrical mounting shell 301 is provided with three first connecting rods 302 that are plugged into the side baffle assembly 200. A back plate 304 is bolted to the first connecting rods 302 to close the rear side of the cabinet and to close the front opening of the electrical mounting shell 301 during transportation. A heat exchange assembly 314 is provided inside the electrical mounting shell 301 to exchange heat and cool the electrical components 305.

[0059] The cabinet bottom assembly 100, which is inserted and cooperates with the side baffle assembly 200, is used as the bottom of the cabinet. The cabinet bottom assembly 100 has the structural feature of circulating cooling for the heat exchange assembly 314.

[0060] The cabinet top assembly 500, which is inserted and cooperates with the side baffle assembly 200, is used as the top of the cabinet. The cabinet top assembly 500 has the structural feature of upward explosion-proof pressure relief in case of an explosion inside the cabinet.

[0061] In a further embodiment, such as Figure 6 , Figure 7 As shown, the cabinet bottom assembly 100 includes a cubic bottom shell 101, in which a compressor 105 and a heat exchanger 106 are disposed. The compressor 105 and the heat exchanger 106 are connected by a connecting pipe 107. The compressor 105 and the heat exchanger 106 are respectively provided with a first liquid inlet pipe 118 and a first liquid outlet pipe 117 connected to the heat exchange assembly 314 in the electrical structure assembly 300. A replenishment pipe 108 is provided on the connecting pipe 107, and a replenishment assembly 109 for automatically replenishing the working fluid in the first liquid inlet pipe 118 and the first liquid outlet pipe 117 is provided at the end of the replenishment pipe 108.

[0062] In a further embodiment, such as Figure 6 , Figure 7 As shown, the replenishment assembly 109 includes a replenishment cylinder 110 that communicates with the replenishment tube 108 and is disposed in a receiving groove 104 on the bottom shell 101. The end of the replenishment cylinder 110 is provided with an air hole 111. A sliding plug 115 is slidably disposed in the replenishment cylinder 110. A guide rod 116 is disposed on the sliding plug 115. The guide rod 116 slides in a first guide sleeve 112 at the end of the replenishment cylinder 110. A plurality of locking blocks 113 that cooperate with the guide rod 116 are circumferentially disposed at the end of the first guide sleeve 112. A first locking sleeve 114 that presses the locking blocks 113 against the guide rod 116 is threadedly connected to the first guide sleeve 112.

[0063] In a further embodiment, such as Figure 9As shown, the cabinet top assembly 500 includes a cubic top shell 501. The top shell 501 is provided with a porous ceramic explosion-proof pressure relief layer 505. A pressure relief groove 506 is provided on the lower side of the explosion-proof pressure relief layer 505. Several circular holes opposite to the pressure relief grooves 506 are provided on the bottom of the top shell 501. A pressure-sensitive membrane 507 is provided in the circular holes. Pressure relief windows 504 are provided on both sides of the top shell 501.

[0064] In a further embodiment, such as Figure 10 , Figure 11 As shown, the cabinet top assembly 500 includes a cubic top shell 501 with an upper opening. A cover plate 509, which is hinged to the upper opening of the top shell 501 and can be opened and closed from the rear of the cabinet, is connected to the cover plate 509 and the top shell 501. Two third springs 521 are connected between the cover plate 509 and the top shell 501 to close the upper opening of the top shell 501. A first pressure relief grille 508 is provided on the lower side of the top shell 501. A baffle 510, which opens and closes the first pressure relief grille 508 from the rear, is hinged to the bottom inside the top shell 501. A second pressure relief grille 511 is provided on the baffle 510. Two locking assemblies 512 are symmetrically arranged between the top cover and the baffle 510. Under normal circumstances, the cover plate 509 is locked in the closed state. In the event of an explosion inside the cabinet, the cover plate 509 is unlocked by the swing of the baffle 510.

[0065] In a further embodiment, such as Figure 11 , Figure 12 As shown, the locking assembly 512 includes a rod sleeve 516 hinged within the top shell 501. A first connecting rod 515 and a second connecting rod 517 are slidably disposed at both ends of the rod sleeve 516. The end of the first connecting rod 515 is hinged to a fixed rod 513 fixed on the baffle 510. A second spring 514 is connected between the fixed rod 513 and the bottom of the top shell 501 to close the first pressure relief grille 508 of the baffle 510. The end of the second connecting rod 517 is hinged to one end of a V-rod 518 hinged within the top shell 501. A first locking hook 519 is provided at the other end of the V-rod 518. The first locking hook 519 cooperates with a second locking hook 520 on the cover plate 509.

[0066] In a further embodiment, such as Figure 4 , Figure 6 , Figure 9 , Figure 10 , Figure 13 , Figure 14As shown, the side guard assembly 200 includes a square frame 201. The upper and lower ends of the square frame 201 are respectively provided with two first plugs 203 that cooperate with the third slot 502 on the top shell 501 and two first plugs 203 that cooperate with the first slot 102 on the bottom shell 101. A round-headed locking pin 204 that cooperates with the first locking hole 103 on the first slot 102 or the second locking hole 503 on the second slot 202 is slidably disposed in the round groove on the first plug 203. A first spring 205 that resets the corresponding round-headed locking pin 204 is provided in the round groove. A side plate 206 that serves as the side wall of the cabinet is provided on the square frame 201.

[0067] In a further embodiment, such as Figure 5 , Figure 15 As shown, the heat exchange assembly 314 includes several first heat exchange tubes 306 distributed near the electrical components 305. A second heat exchange tube 309 with an annular space is provided on the outer side of the first heat exchange tubes 306. Paraffin base 310 is provided in the second heat exchange tube 309. The two ends of all the first heat exchange tubes 306 are respectively connected to a second liquid inlet pipe 311 and a second liquid outlet pipe 312. The second liquid inlet pipe 311 and the second liquid outlet pipe 312 are respectively connected to the first liquid outlet pipe 117 and the first liquid inlet pipe 118 through a connecting assembly 400. Two vertical exhaust pipes 307 are provided on the upper side wall of the two ends of the first heat exchange tube 306 located at the uppermost end. The end of the exhaust pipe 307 is provided with a sealing cap 308.

[0068] In a further embodiment, such as Figure 13 , Figure 15 , Figure 16 As shown, the first connecting rod 302 has two second plugs 313 at both ends, and the second plugs 313 are inserted into the second slots 202 on the corresponding side frame 201. The electrical mounting housing 301 has two second connecting rods 303 symmetrically arranged at its front end.

[0069] In a further embodiment, such as Figure 8As shown, the connecting assembly 400 includes a first pipe head 401 disposed at the end of the first inlet pipe 118 or the first outlet pipe 117 and a second pipe head 406 disposed at the end of the first inlet pipe 118 or the second outlet pipe 312. The end of the first pipe head 401 is provided with a sealing gasket 405 that seals with the end of the second pipe head 406. The end of the second pipe head 406 is provided with a limiting ring 407. A second locking sleeve 411, threadedly engaged with the first pipe head 401, is fitted onto the second pipe head 406. The second locking sleeve 411 and the limiting ring 407 cooperate with each other. The sealing gasket 405, the first pipe head 401 and the second pipe head 406 are respectively provided with a second guide sleeve 402 and a third guide sleeve 408, the second guide sleeve 402 and the third guide sleeve 408 are respectively slidably provided with a first plug 403 and a second plug 409, the ends of the second guide sleeve 402 and the third guide sleeve 408 are respectively threaded to a first screw 404 rotatably connected to the first plug 403 and a second screw 410 rotatably connected to the second plug 409, the ends of the first screw 404 and the second screw 410 are provided with internal hexagonal grooves that cooperate with hexagonal handles.

[0070] The cabinet top assembly 500 in this invention adopts a modular design and has an explosion-proof function with upward pressure relief. After the top assembly completes the explosion-proof pressure relief for an explosion occurring inside the cabinet, it can be replaced if damaged. This ensures that the cabinet can continue to be used even if the top assembly 500 is damaged, without the need to replace or repair the entire cabinet, thus avoiding injury to personnel and effectively reducing maintenance costs after damage to the top assembly 500. The detachable structure of the two side baffle assemblies 200 and the modular structure of the cabinet bottom assembly 100 in this invention enable timely replacement of damaged parts, also effectively reducing maintenance costs after partial damage to the cabinet. The heat dissipation structure distributed in the electrical installation assembly and the cabinet bottom assembly 100 in this invention can dissipate heat from the electrical components 305 installed in the electrical installation shell 301 inside the cabinet, effectively reducing the temperature rise inside the cabinet and providing timely and continuous heat dissipation for the electrical components 305, protecting them from damage due to overheating. The side panel assembly 200, cabinet bottom assembly 100, cabinet top assembly 500, and electrical installation assembly in this invention adopt a disassembled or modular design, which makes it easy to occupy less space during transportation and improve transportation efficiency. At the same time, the back plate 304 in the electrical installation assembly can be sealed to the electrical installation shell 301 with bolts during transportation, so as to protect the electrical components 305 in the electrical installation shell 301 from being damaged by bumps during transportation.

[0071] The operation process of this invention is as follows:

[0072] During transportation, the side baffle assembly 200, electrical structure assembly 300, bottom assembly 100, and top assembly 500 of the cabinet are transported separately. In the bottom assembly 100, the first plug 403 in the first pipe head 401 at the end of the first liquid inlet pipe 118 and the first liquid outlet pipe 117 closes the first pipe head 401. In the electrical structure assembly 300, the second plug 409 in the second pipe head 406 at the end of the second liquid inlet pipe 311 and the second liquid outlet pipe 312 closes the second pipe head 406. The first liquid inlet pipe 118, the first liquid outlet pipe 117, the connecting pipe 107, the replenishing pipe 108, and the replenishing cylinder 110 are filled with working fluid. The first locking sleeve 114 in the replenishing assembly 109 is in a locked state. The first locking sleeve 114 presses the locking block 113 on the first guide sleeve 112 onto the guide rod 116 and locks the guide rod 116. The back plate 304 in the electrical structure assembly 300 is connected to two second connecting rods 303 on the front side of the electrical mounting housing 301 by bolts, and closes the front opening of the electrical mounting housing 301 to protect the electrical components 305 in the electrical mounting housing 301. The first heat exchange tube 306, the second liquid inlet pipe 311 and the second liquid outlet pipe 312 in the electrical structure assembly 300 are filled with working fluid. The second plug 409 in the second pipe head 406 of the second liquid inlet pipe 311 and the second liquid outlet pipe 312 closes the second pipe head 406, and the exhaust pipe 307 is closed by the sealing cover 308. In the second scheme cabinet top assembly 500, the baffle 510 in the lock assembly 512 closes the first pressure relief grille 508 at the bottom of the top shell 501, the first hook hooks with the second hook on the cover plate 509, the cover plate 509 closes the top opening of the top shell 501, and the second spring 514 and the third spring 521 are both in a stretched state. The round-headed locking pin 204 in the side block assembly 200 protrudes from the round groove on the first plug 203 under the action of the first spring 205, and the first spring 205 is in a compressed state.

[0073] The cabinet assembly process is as follows:

[0074] First, remove the back plate 304 from the front of the electrical mounting housing 301 in the electrical structure assembly 300. Then, insert the second plugs 313 at both ends of the three first connecting rods 302 on the rear side of the electrical structure assembly 300 into the second slots 202 on the two side baffle assemblies 200. Finally, install the back plate 304 on the rear side of the electrical mounting housing 301 with bolts and connect and fix it to the two side baffle assemblies 200.

[0075] Next, insert the lower end first plug 203 of the two side baffle assemblies 200 into the four first slots 102 on the cabinet bottom assembly 100. The round-headed locking pin 204 on the first plug 203 is inserted into the first locking hole 103 on the wall of the first slot 102 under the action of the first spring 205 to form a lock. Then, connect the second tube head 406 on the second liquid inlet pipe 311 in the electrical structure assembly 300 with the first tube head 401 on the first liquid outlet pipe 117 in the cabinet bottom assembly 100. Connect the first tube head 401 in the second liquid outlet pipe 312 in the electrical structure assembly 300 with the first tube head 401 on the first liquid inlet pipe 118 in the cabinet bottom assembly 100. Rotate the second locking sleeving 411 in the two connecting assemblies 400 to connect the first tube head 401 with the thread, so that the first tube head 401 and the second tube head 406 in the connecting assembly 400 are sealed and connected. Then, use a hexagonal... The wrench rotates the four second screws 410 in the two connecting components 400, which causes the first plug 403 and the second plug 409 to open the first pipe head 401 and the second pipe head 406. Then, the sealing cap 308 on the exhaust pipe 307 is opened, and the air that enters the connecting components 400 is discharged through the exhaust pipe 307. Next, the first locking sleeve 114 is rotated to release the locking of the guide rod 116 in the replenishment component 109. The guide rod 116 is pushed to drive the sliding plug 115 to push the working medium in the replenishment cylinder 110 inward into the connecting pipe 107, the first inlet pipe 118, the first outlet pipe 117, the second inlet pipe 311, the second outlet pipe 312 and the first heat exchange pipe 306 to replenish the working medium in the top first heat exchange pipe 306. When the working medium liquid level in the exhaust pipe 307 reaches the vicinity of the exhaust pipe 307 opening, the exhaust pipe 307 is sealed and closed by the sealing cap 308.

[0076] Then, the top cabinet assembly 500 is inserted into the upper first plug 203 of the two side panel assemblies 200. The round-headed locking pin 204 of the upper first plug 203 of the side panel assemblies 200, under the action of the first spring 205, is inserted into the second locking hole 503 on the wall of the third slot 502 of the top cabinet assembly 500 to form a lock. In the first embodiment, the two pressure relief windows 504 of the top cabinet assembly 500 are located on the left and right sides of the cabinet. In the second embodiment, the hinged side of the cover plate 509 of the top cabinet assembly 500 is located on the rear side of the cabinet. At this point, the cabinet assembly is complete.

[0077] When the electrical components 305 in the electrical structural assembly 300 inside the cabinet generate heat, the paraffin-based 310 in the second heat exchange tube 309 on the first heat exchange tube 306 near the electrical components 305 absorbs heat and melts. When the temperature sensor on the second heat exchange tube 309 causes the compressor 105 in the cabinet bottom assembly 100 to run, it circulates and cools the working fluid in the first heat exchange tube 306. The working fluid in the first heat exchange tube 306 absorbs and carries away the heat absorbed by the paraffin-based 310 in the second heat exchange tube 309, thereby achieving the purpose of cooling the electrical components 305.

[0078] When an explosion occurs inside the cabinet, the pressure-sensitive membrane 507 in the cabinet top assembly 500 of the first scheme ruptures under the explosion pressure inside the cabinet and opens the round hole at the bottom of the top shell 501 to release pressure into the explosion-proof pressure relief layer 505 inside the top shell 501. The explosion-proof pressure relief layer 505 effectively provides explosion-proof pressure relief against the explosion impact, and the pressure relief windows 504 on both sides of the top shell 501 also play a certain pressure relief role. In the cabinet top assembly 500 of the second scheme, the baffle 510 overcomes the second spring 514 and opens the first pressure relief grille 508 under the explosion impact inside the cabinet. The baffle 510 drives the V-rod 518 to swing through the fixed rod 513, the first connecting rod 515, the rod sleeve 516, and the second connecting rod 517. The first locking hook 519 on the V-rod 518 disengages from the second locking hook 520 on the cover plate 509. The cover plate 509 opens under the internal explosion impact and provides explosion-proof pressure relief from the top to the rear. The third spring 521 further stretches and forms a buffer against the explosion.

[0079] When the top cabinet component 500, bottom cabinet component 100, or side panel component 200 is partially damaged, it can be partially disassembled and replaced, reducing the repair cost after the cabinet is damaged.

Claims

1. A high-low voltage switchgear assembly for electric energy distribution, control and protection, characterized in that, include: Two side-block assemblies are used as two side walls of the cabinet, and a cabinet door that opens and closes at the front of the cabinet is hinged to one of the side-block assemblies. An electrical structural assembly that plugs into the side baffle assembly is used as the rear wall of the cabinet and for installing electrical components inside the cabinet. The electrical structural assembly includes an electrical mounting shell with a front opening for installing electrical components. The rear end of the electrical mounting shell is provided with three first connecting rods that plug into the side baffle assembly. A back plate that closes the rear side of the cabinet and is used to close the front opening of the electrical mounting shell during transportation is provided on the first connecting rods by bolts. A heat exchange assembly for heat exchange and cooling of electrical components is provided inside the electrical mounting shell. A cabinet bottom assembly that is plugged into the side panel assembly is used as the bottom of the cabinet body. The cabinet bottom assembly has a structure for circulating cooling of the heat exchange assembly. The cabinet top assembly, which is inserted and matched with the side baffle assembly, is used as the top of the cabinet. The cabinet top assembly has a structure for upward explosion-proof pressure relief in case of an explosion inside the cabinet. The cabinet bottom assembly includes a cubic bottom shell, in which a compressor and a heat exchanger are disposed. The compressor and the heat exchanger are connected by a connecting pipe. The compressor and the heat exchanger are respectively provided with a first liquid inlet pipe and a first liquid outlet pipe connected to the heat exchange component in the electrical structure assembly. A replenishment pipe is provided on the connecting pipe, and a replenishment component for automatically replenishing the working fluid in the first liquid inlet pipe and the first liquid outlet pipe is provided at the end of the replenishment pipe. The fluid replenishment assembly includes a fluid replenishment cylinder that communicates with a fluid replenishment tube and is disposed in a receiving groove on the bottom shell. The end of the fluid replenishment cylinder is provided with an air hole. A sliding plug is slidable in the fluid replenishment cylinder. A guide rod is provided on the sliding plug. The guide rod slides in a first guide sleeve at the end of the fluid replenishment cylinder. A plurality of locking blocks that cooperate with the guide rod are circumferentially provided at the end of the first guide sleeve. A first locking nut is threadedly connected to the first guide sleeve to press the locking blocks against the guide rod. The heat exchange assembly includes several first heat exchange tubes distributed near electrical components. A second heat exchange tube with an annular space is arranged on the outside of the first heat exchange tubes. The second heat exchange tube is filled with paraffin base. Both ends of all the first heat exchange tubes are respectively connected to a second liquid inlet pipe and a second liquid outlet pipe. The second liquid inlet pipe and the second liquid outlet pipe are respectively connected to the first liquid outlet pipe and the first liquid inlet pipe through a connecting assembly. Two vertical exhaust pipes are arranged on the upper side of the two ends of the first heat exchange tube located at the top. The ends of the exhaust pipes are provided with sealing caps.

2. A high-low voltage switchgear assembly according to claim 1, characterized in that The cabinet top assembly includes a cubic top shell, inside which is a porous ceramic explosion-proof pressure relief layer. A pressure relief groove is provided on the lower side of the explosion-proof pressure relief layer. Several circular holes opposite to the pressure relief groove are provided on the bottom of the top shell. A pressure-sensitive membrane is provided in each of the circular holes. Pressure relief windows are provided on both sides of the top shell.

3. A high-low voltage switchgear assembly according to claim 1, wherein, The cabinet top assembly includes a cubic top shell with an opening on the upper side. A cover plate that opens and closes from the rear of the cabinet is hinged to the upper opening of the top shell. Two third springs are connected between the cover plate and the top shell to close the upper opening of the top shell. A first pressure relief grille is provided on the lower side of the top shell. A baffle that opens and closes the first pressure relief grille from the rear is hinged to the bottom inside the top shell. A second pressure relief grille is provided on the baffle. Two locking assemblies are symmetrically arranged between the cover plate and the baffle. Under normal circumstances, the cover plate is locked in the closed state. In the event of an explosion inside the cabinet, the closed cover plate is unlocked by the swinging of the baffle.

4. A high-low voltage switchgear assembly according to claim 3, wherein, The locking assembly includes a rod sleeve hinged to the top shell. A first connecting rod and a second connecting rod are slidably disposed at both ends of the rod sleeve. The end of the first connecting rod is hinged to a fixed rod fixed to the baffle. A second spring is connected between the fixed rod and the bottom of the top shell to close the first pressure relief grille of the baffle. The end of the second connecting rod is hinged to one end of a V-rod hinged to the top shell. The other end of the V-rod is provided with a first locking hook, which cooperates with a second locking hook on the cover plate.

5. A high-low voltage switchgear assembly according to claim 2 or 3, characterized in that The side panel assembly includes a square frame. The upper and lower ends of the square frame are respectively provided with two first plugs that mate with the third slot on the top shell and two first plugs that mate with the first slot on the bottom shell. A round-headed locking pin that mates with the first locking hole on the first slot or the second locking hole on the second slot is slidably disposed in the round groove on the first plug. A first spring that resets the corresponding round-headed locking pin is disposed in the round groove. A side panel that serves as the side wall of the cabinet is disposed on the square frame.

6. A high-low voltage switchgear assembly according to claim 5, wherein, The first connecting rod has two second plugs at both ends, and the second plugs are inserted into the second slots on the corresponding side frame. The electrical mounting housing has two second connecting rods symmetrically arranged at its front end.

7. A high-low voltage switchgear assembly according to claim 1, wherein, The connecting assembly includes a first pipe head disposed at the end of a first inlet pipe or a first outlet pipe and a second pipe head disposed at the end of a second inlet pipe or a second outlet pipe. The end of the first pipe head is provided with a sealing gasket that seals with the end of the second pipe head. The end of the second pipe head is provided with a limiting ring. A second locking sleeve that is threaded with the first pipe head is fitted on the second pipe head. The second locking sleeve and the limiting ring are fitted with a sealing gasket. A second guide sleeve and a third guide sleeve are respectively disposed on the pipe walls of the first pipe head and the second pipe head. A first plug and a second plug are slidably disposed in the second guide sleeve and the third guide sleeve, respectively. The ends of the second guide sleeve and the third guide sleeve are respectively threaded with a first screw that is rotatably connected to the first plug and a second screw that is rotatably connected to the second plug. The ends of the first screw and the second screw are provided with internal hexagonal grooves that mate with hexagonal handles.

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