A high and low voltage complete switch cabinet

Abstract

This invention discloses a high- and low-voltage complete switchgear, belonging to the field of power technology. It solves the problem that existing switchgear cannot protect and limit the connecting wires of high- and low-voltage electrical equipment during high- and low-voltage frequency switching, leading to equipment failure when short circuits or loosening occur. The switchgear includes: a main body, comprising a cabinet shell; high- and low-voltage power distribution components, including a high-voltage transformer, a low-voltage circuit breaker, and high- and low-voltage connecting cables; and a switching protection mechanism for explosion-proof and limiting protection of the high- and low-voltage connecting cables during high- and low-voltage switching. The invention features a switching protection mechanism composed of a switching combination cover, a cable limiting part, and an explosion-proof protection part. The switching combination cover and the explosion-proof protection part work together to limit and protect the high- and low-voltage connecting cables, preventing dangerous jetting or explosions caused by leakage of the high-voltage connecting cables in a high-voltage environment during high- and low-voltage switching.

Description

Technical Field

[0001] This invention specifically belongs to the field of power technology and relates to a high- and low-voltage complete switchgear. Background Technology

[0002] Distribution cabinets (boxes) are the final stage equipment in a power distribution system. Their main function is to distribute the electrical energy of a circuit in the previous stage of power distribution equipment to the nearest load and to provide protection, monitoring and control for the load. Distribution cabinets are widely used in various places, such as schools, government agencies, hospitals, and factories. According to specific uses, they are divided into various types such as power distribution cabinets, lighting distribution cabinets and metering cabinets.

[0003] Chinese patent CN210443889U discloses a high and low voltage sealed distribution cabinet, including a main cabinet. A cooling fan is fixedly installed on the top wall of the inner cavity of the main cabinet. Two vertical rods are fixedly installed between the top and bottom walls of the inner cavity of the main cabinet, and a supporting crossbar is fixedly installed between the two vertical rods. However, existing distribution cabinets cannot protect and limit the connecting wires of high and low voltage electrical equipment when switching between high and low voltage power frequencies. When the wires are short-circuited or loose, high and low voltage electrical equipment failures occur, causing power accidents. In order to solve the above problems, we propose a high and low voltage complete distribution cabinet. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high- and low-voltage complete switchgear, which solves the problem that existing switchgear cannot protect and limit the connecting wires of high- and low-voltage electrical equipment when switching between high and low voltage power frequencies, and causes high- and low-voltage electrical equipment failure when the wires are short-circuited or loose.

[0005] This invention is implemented as follows: a high- and low-voltage switchgear, the high- and low-voltage switchgear comprising:

[0006] The main body of the power distribution cabinet includes a cabinet shell and a cabinet base. The cabinet shell is fixedly installed on the cabinet base, and a working cavity is provided inside the cabinet shell.

[0007] A high- and low-voltage power distribution assembly is provided, which is located in the working chamber. The high- and low-voltage power distribution assembly includes a high-voltage transformer, a low-voltage circuit breaker, and high- and low-voltage connecting cables. The high-voltage transformer and the low-voltage circuit breaker are respectively located in the working chamber and are detachably connected to the cabinet shell. The two ends of the high- and low-voltage connecting cables are electrically connected to the high-voltage transformer and the low-voltage circuit breaker, respectively.

[0008] A switching protection mechanism is provided inside the working chamber and is sleeved on the outside of the high and low voltage connection cable. The switching protection mechanism is used to provide explosion-proof and limit protection for the high and low voltage connection cable when switching between high and low voltage.

[0009] The switching protection mechanism includes:

[0010] A protection mechanism mounting base is fixedly installed inside the cabinet shell;

[0011] At least one set of switching combination covers, wherein the switching combination covers are detachably installed on the protection mechanism mounting base, and the switching combination covers are sleeved on the outside of the high and low voltage connection cables;

[0012] A cable limiting part, which is installed on the switching assembly cover, is used to limit and protect the high and low voltage connecting cables.

[0013] At least one set of explosion-proof protection units is provided, which are installed inside the switching assembly cover to protect the high-voltage and low-voltage connecting cables and to protect the high-voltage transformer and low-voltage circuit breaker in the event of a flash explosion.

[0014] Preferably, the switching combination cover includes:

[0015] An external heat dissipation cover, the interior of which is hollow, and at least one set of switching heat dissipation slots are provided on the side wall of the external heat dissipation cover;

[0016] An inner protective cover is installed inside the outer heat dissipation cover, and the inner protective cover is fixedly connected to the outer heat dissipation cover by at least one set of elastic support rods.

[0017] Preferably, the cable limiting part includes:

[0018] An adjusting gear ring is rotatably mounted in an inner protective cover, and the inner protective cover is provided with a pawl for locking the adjusting gear ring. The pawl is rotatably connected to the inner protective cover through a limiting torsion spring.

[0019] At least one set of adjusting gears, the adjusting gears being rotatably mounted on the side wall of the inner protective cover, and the adjusting gears engaging with the adjusting gear ring for transmission;

[0020] A limiting lever is detachably mounted on the end wall of the adjusting gear, and a limiting anti-slip roller is fixedly mounted on the end of the limiting lever.

[0021] Preferably, the explosion-proof protection unit includes:

[0022] An explosion-proof rack is fixedly connected to an inner protective cover, and a rack positioning rod is fixedly connected to one end of the explosion-proof rack away from the inner protective cover. The rack positioning rod is slidably connected to the switching heat dissipation groove.

[0023] At least one set of driven gears is rotatably mounted on the inner wall of the outer heat sink, and the driven gears mesh with the explosion-proof rack. A limit swing arm is fixedly mounted on the driven gears.

[0024] Preferably, the explosion-proof protection unit further includes:

[0025] A limiting speed reducer, wherein the limiting speed reducer is fixedly connected to the end of the limiting swing arm;

[0026] A limiting spring is embedded in the limiting speed reducer, and one end of the limiting spring away from the limiting speed reducer extends into the switching heat dissipation groove and is fixedly connected to the inner wall of the switching heat dissipation groove.

[0027] Preferably, it also includes a heat dissipation and dust removal mechanism, which is installed at the bottom of the high-voltage transformer and is used to provide heat dissipation and dust removal protection for the high-voltage transformer.

[0028] The heat dissipation and dust removal mechanism includes:

[0029] A heat dissipation and dust removal base is fixedly installed inside the cabinet shell, and at least one set of heat dissipation and dust removal grooves are provided on the heat dissipation and dust removal base.

[0030] Negative pressure exhaust unit, wherein the negative pressure exhaust unit is located at the bottom of the heat dissipation and dust removal base;

[0031] A dust guiding section is provided inside the heat dissipation and dust removal tank. The dust guiding section is used to guide the sucked-in dust and accelerate the dust flow.

[0032] An auxiliary heat collector is installed inside the heat dissipation and dust removal base. The auxiliary heat collector is used to help absorb the heat generated when the high-voltage transformer is working.

[0033] Preferably, the negative pressure exhaust unit includes:

[0034] An exhaust fan motor is fixedly installed at the bottom of the heat dissipation and dust removal base;

[0035] At least one set of negative pressure exhaust fans, which are fixedly mounted on the output shaft of the exhaust motor.

[0036] Preferably, the auxiliary heat collection unit includes:

[0037] An auxiliary heat collection plate is fixedly installed on a heat dissipation and dust removal base;

[0038] At least one set of auxiliary heat collection tanks, wherein the auxiliary heat collection tanks are formed inside the auxiliary heat collection plate;

[0039] At least one set of auxiliary heat-absorbing rods are provided, which are detachably installed in the auxiliary heat collection tank. The auxiliary heat-absorbing rods are used to help absorb the heat generated when the high-voltage transformer is working.

[0040] Preferably, the dust guiding section includes:

[0041] An arc-shaped flow guide seat, which can be detachably installed inside a heat dissipation and dust removal groove;

[0042] A dust diversion ball is fixedly installed inside the arc-shaped flow guide seat.

[0043] Preferably, the dust guide section further includes:

[0044] A heat-expanding seat is fixedly installed inside the arc-shaped flow guide seat. The heat-expanding seat is used to absorb the heat of the dust and expand, thereby changing the cavity volume of the arc-shaped flow guide seat and increasing the dust flow rate inside the arc-shaped flow guide seat.

[0045] At least one set of heat-collecting fins, which are detachably installed within the heat-receiving expansion seat.

[0046] Compared with the prior art, the embodiments of this application have the following main advantages:

[0047] In this embodiment of the invention, a switching protection mechanism is provided, which consists of a switching combination cover, a cable limiting part, and an explosion-proof protection part. The switching combination cover and the explosion-proof protection part work together to limit and protect the high-voltage and low-voltage connecting cables, so as to avoid dangerous jets and explosions caused by leakage of high-voltage and low-voltage connecting cables in the high-voltage environment during high-voltage switching.

[0048] In this embodiment of the invention, a cable limiting part is provided, which can support and limit the high and low voltage connecting cables of different specifications, thereby ensuring the normal operation of the high and low voltage connecting cables and avoiding the phenomenon of loosening or falling off the high and low voltage connecting cables during high and low voltage switching.

[0049] In this embodiment of the invention, an explosion-proof protection unit is provided. The explosion-proof protection unit, through the coordinated operation of an explosion-proof rack, a driven gear, a limit reducer, and a limit spring, achieves shock absorption protection for the inner protective cover and the high- and low-voltage connecting cables, preventing the high- and low-voltage connecting cables from becoming loose during high- and low-voltage switching. It can also protect the high- and low-voltage power distribution components in the event of flash explosions or electric arc flashes, preventing damage to the high- and low-voltage power distribution components.

[0050] In this embodiment of the invention, a heat dissipation and dust removal mechanism is provided. The heat dissipation and dust removal mechanism consists of a negative pressure exhaust section, a dust guiding section, and an auxiliary heat collection section. The negative pressure exhaust section, the dust guiding section, and the auxiliary heat collection section work together to fully absorb the heat generated by the high-voltage transformer during operation, thereby providing heat dissipation protection for the high-voltage transformer. At the same time, it can also fully adsorb the dust adsorbed around the high-voltage transformer, avoiding excessive dust accumulation that could lead to a decrease in insulation performance, short circuit accidents, or partial discharge of the transformer that could generate electric sparks.

[0051] In this embodiment of the invention, a dust guiding section is provided. The dust guiding section not only guides the dust, facilitating its collection and discharge, but also reduces its internal volume when heated, thereby changing the internal pressure, increasing the dust flow rate, and further improving the dust removal efficiency. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of the high and low voltage complete set of power distribution cabinets provided by the present invention.

[0053] Figure 2 This is a front view of the high and low voltage complete switchgear provided by the present invention.

[0054] Figure 3 yes Figure 2 A sectional view along line AA.

[0055] Figure 4 This is a schematic diagram of the structure of the high and low voltage power distribution components provided by the present invention.

[0056] Figure 5 This is a three-dimensional structural diagram of the high and low voltage power distribution components provided by the present invention.

[0057] Figure 6 This is a schematic diagram of the switching protection mechanism provided by the present invention.

[0058] Figure 7 This is an isometric view of the switching protection mechanism provided by the present invention.

[0059] Figure 8 This is a side view of the switching protection mechanism provided by the present invention.

[0060] Figure 9 This is a schematic diagram of the explosion-proof protection unit provided by the present invention.

[0061] Figure 10 This is a three-dimensional structural diagram of the explosion-proof protection part provided by the present invention.

[0062] Figure 11 This is a schematic diagram of the heat dissipation and dust removal mechanism provided by the present invention.

[0063] Figure 12 This is a three-dimensional structural diagram of the heat dissipation and dust removal mechanism provided by the present invention.

[0064] Figure 13 This is a schematic diagram of the dust guide section provided by the present invention.

[0065] Figure 14 This is an isometric view of the dust guide section provided by the present invention.

[0066] Figure 15 This is a bottom view of the dust guide section provided by the present invention.

[0067] In the diagram: 1-Distribution cabinet body, 11-Cabinet shell, 12-Cabinet base, 13-Working chamber, 2-Switching protection mechanism, 21-Protection mechanism mounting base, 22-Switching combination cover, 221-Outer heat dissipation cover, 222-Inner protective cover, 223-Elastic support rod, 224-Switching heat dissipation groove, 23-Explosion-proof protection part, 231-Explosion-proof rack, 232-Driven gear, 233-Limit reduction disc, 234-Limit spring, 235-Rack positioning rod, 236-Limit swing arm, 24-Cable limit part, 241-Adjusting gear ring, 242-Adjusting gear, 243-Limit... Position lever, 244-Limit anti-slip roller, 3-Heat dissipation and dust removal mechanism, 31-Negative pressure exhaust fan, 311-Exhaust fan motor, 312-Negative pressure exhaust fan, 32-Auxiliary heat collection unit, 321-Auxiliary heat collection plate, 322-Auxiliary heat collection trough, 323-Auxiliary heat absorption rod, 33-Heat dissipation and dust removal seat, 331-Heat dissipation and dust removal trough, 34-Dust guide unit, 341-Arc-shaped guide seat, 342-Dust diversion ball, 343-Heat expansion seat, 344-Heat collection fins, 4-High and low voltage power distribution components, 41-High voltage transformer, 42-Low voltage circuit breaker, 43-High and low voltage connection cable. Detailed Implementation

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0069] Existing distribution cabinets cannot protect and limit the connecting wires of high- and low-voltage electrical equipment when switching power frequencies. Short circuits or loosening of these wires can cause malfunctions in high- and low-voltage electrical equipment, leading to power accidents. To address these issues, we propose a complete high- and low-voltage distribution cabinet. In short, the distribution cabinet includes a cabinet body 1, high- and low-voltage distribution components 4, and a switching protection mechanism 2. The cabinet body 1 includes a cabinet shell 11 and a cabinet base 12. The high- and low-voltage distribution components 4 are housed within a working chamber 13 and include a high-voltage transformer 41, a low-voltage circuit breaker 42, and high- and low-voltage connecting cables 43. The switching protection mechanism 2 includes a protection unit... The structure includes a mounting base 21, at least one set of switching combination covers 22, a cable limiting part 24, and an explosion-proof protection part 23. During operation, the high-voltage transformer 41 and the low-voltage circuit breaker 42 are activated to distribute high-voltage electrical energy. After being stepped down by the high-voltage transformer 41, the current is transmitted through the high-low voltage connecting cable 43 and then further distributed by the low-voltage part to various electrical equipment or control boxes in the high-low voltage power distribution component 4. At the same time, the switching combination cover 22, the cable limiting part 24, and the explosion-proof protection part 23 in the switching protection mechanism 2 limit and protect the high-low voltage connecting cable 43 to prevent dangerous jets or explosions caused by leakage of the high-voltage and low-voltage connecting cable 43 in the high-voltage environment during high-low voltage switching. In this embodiment of the invention, a switching protection mechanism 2 is provided. The switching protection mechanism 2 consists of a switching combination cover 22, a cable limiting part 24, and an explosion-proof protection part 23. The switching combination cover 22 and the explosion-proof protection part 23 work together to limit and protect the high-voltage and low-voltage connecting cable 43, so as to avoid dangerous jets or explosions caused by leakage of the high-voltage and low-voltage connecting cable 43 in the high-voltage environment during high-voltage switching.

[0070] This invention provides a high- and low-voltage complete switchgear, such as... Figures 1-3 As shown, the high and low voltage switchgear includes:

[0071] The main body of the power distribution cabinet 1 includes a cabinet shell 11 and a cabinet base 12. The cabinet shell 11 is fixedly installed on the cabinet base 12, and a working cavity 13 is provided inside the cabinet shell 11.

[0072] In this embodiment, the cabinet shell 11 can be a hollow rectangular or round base, and the cabinet shell 11 is made of PVC or stainless steel. The inner and outer walls of the cabinet shell 11 are coated with insulating material, and the bottom of the cabinet shell 11 is fixed to the cabinet base 12 by fastening bolts or welding.

[0073] High and low voltage power distribution assembly 4, wherein the high and low voltage power distribution assembly 4 is disposed within the working chamber 13, such as Figures 4-5As shown, the high and low voltage power distribution assembly 4 includes a high voltage transformer 41, a low voltage circuit breaker 42, and a high and low voltage connecting cable 43. The high voltage transformer 41 and the low voltage circuit breaker 42 are respectively installed in the working chamber 13, and the high voltage transformer 41 and the low voltage circuit breaker 42 are detachably connected to the cabinet shell 11. The two ends of the high and low voltage connecting cable 43 are electrically connected to the high voltage transformer 41 and the low voltage circuit breaker 42 respectively.

[0074] It should be noted that the high and low voltage power distribution assembly 4 also includes a high voltage working group and a low voltage working group. The high voltage working group includes a high voltage circuit breaker, a high voltage transformer 41, a high voltage grounding switch, a voltage transformer, and a current transformer. The high voltage working group is used for the on / off control and protection of high voltage current. The low voltage working group includes a low voltage circuit breaker 42, a low voltage contactor, a fuse, and a low voltage relay. The installation methods and control principles of the high voltage working group and the low voltage working group are existing technologies and are not limited here.

[0075] The switching protection mechanism 2 is set inside the working chamber 13 and is sleeved on the outside of the high and low voltage connection cable 43. The switching protection mechanism 2 is used to provide explosion-proof and limit protection for the high and low voltage connection cable 43 when switching between high and low voltage.

[0076] Among them, such as Figures 6-8 As shown, the switching protection mechanism 2 includes:

[0077] A protection mechanism mounting base 21 is fixedly installed inside the cabinet outer shell 11;

[0078] At least one set of switching combination covers 22, the switching combination covers 22 being detachably mounted on the protection mechanism mounting base 21, and the switching combination covers 22 being sleeved on the outside of the high and low voltage connection cables 43;

[0079] A cable limiting part 24 is disposed on the switching assembly cover 22. The cable limiting part 24 is used to limit and protect the high and low voltage connecting cables 43.

[0080] At least one set of explosion-proof protection units 23 are provided inside the switching combination cover 22 to protect the high and low voltage connecting cables 43 and to protect the high voltage transformer 41 and the low voltage circuit breaker 42 in the event of a flash explosion.

[0081] It should be noted that the protection mechanism mounting base 21 can be a rectangular base or a "T" shaped base structure. The protection mechanism mounting base 21 is installed on the inner wall of the cabinet shell 11 by means of fastening bolts or buckles. The switching combination cover 22 is linearly and evenly arranged on the protection mechanism mounting base 21. The number of switching combination covers 22 can be 1-6 sets. The two ends of the high and low voltage connecting cables 43 are fixedly connected to the high voltage transformer 41 and the low voltage circuit breaker 42 respectively by means of riveting or threaded connection. The high voltage transformer 41 and the low voltage circuit breaker 42 are installed in the cabinet shell 11 by means of fastening bolts or buckles.

[0082] In this embodiment, during operation, the high-voltage transformer 41 and the low-voltage circuit breaker 42 are activated to distribute high-voltage electrical energy. After being stepped down by the high-voltage transformer 41, the current is transmitted through the high-low voltage connecting cable 43 and then further distributed by the low-voltage section to various electrical equipment or control boxes in the high-low voltage power distribution assembly 4. At the same time, the switching combination cover 22, the cable limiting part 24, and the explosion-proof protection part 23 in the switching protection mechanism 2 limit and protect the high-low voltage connecting cable 43 to prevent dangerous jetting or explosion phenomena caused by leakage of the high-voltage and low-voltage connecting cable 43 in the high-voltage environment during high-low voltage switching.

[0083] In this embodiment of the invention, a switching protection mechanism 2 is provided. The switching protection mechanism 2 consists of a switching combination cover 22, a cable limiting part 24, and an explosion-proof protection part 23. The switching combination cover 22 and the explosion-proof protection part 23 work together to limit and protect the high-voltage and low-voltage connecting cable 43, so as to avoid dangerous jets or explosions caused by leakage of the high-voltage and low-voltage connecting cable 43 in the high-voltage environment during high-voltage switching.

[0084] In a further preferred embodiment of the present invention, such as Figures 6-7 As shown, the switching combination cover 22 includes:

[0085] An external heat dissipation cover 221 is hollow inside, and at least one set of switching heat dissipation slots 224 are provided on the side wall of the external heat dissipation cover 221.

[0086] An inner protective cover 222 is installed inside the outer heat dissipation cover 221, and the inner protective cover 222 is fixedly connected to the outer heat dissipation cover 221 by at least one set of elastic support rods 223.

[0087] It should be noted that both the outer heat dissipation cover 221 and the inner protective cover 222 can be hollow circular seats or rings, and both can be made of rubber, polyvinyl chloride (PVC), and cross-linked polyethylene (XLPE). The switching heat dissipation groove 224 can be a circular groove or a square groove, and the switching heat dissipation groove 224 is circumferentially arranged on the outer heat dissipation cover 221. The elastic support rods 223 are made of rubber or polyvinyl chloride (PVC), and the number of elastic support rods 223 can be 3. -6 sets, the two ends of the elastic support rod 223 are fixedly connected to the outer heat dissipation cover 221 and the inner protective cover 222 respectively by fastening bolts or threaded connection. In this embodiment of the invention, the setting of the outer heat dissipation cover 221 and the inner protective cover 222 is conducive to the heat dissipation of the high and low voltage connection cable 43 on the one hand, and can also support and protect the high and low voltage connection cable 43 on the other hand, ensuring the normal operation of the high and low voltage connection cable 43, and also avoiding the phenomenon of the high and low voltage connection cable 43 becoming loose or falling off during high and low voltage switching.

[0088] In this embodiment, the cable limiting part 24 includes:

[0089] Adjusting gear ring 241, the adjusting gear ring 241 is rotatably mounted in inner protective cover 222, and the inner protective cover 222 is provided with a pawl for locking the adjusting gear ring 241. The pawl is rotatably connected to the inner protective cover 222 through a limiting torsion spring.

[0090] It should be noted that the adjusting gear ring 241 is rotatably connected to the end wall of the inner protective cover 222 via a bearing or roller. The pawl and the limiting torsion spring are provided to ensure that the adjusting gear ring 241 is not easy to rotate or loosen. Multiple sets of ratchet teeth can be circumferentially arranged on the side wall of the adjusting gear ring 241, and the ratchet teeth and the pawl mesh and transmit power.

[0091] At least one set of adjusting gears 242 are rotatably mounted on the side wall of the inner protective cover 222, and the adjusting gears 242 mesh with the adjusting gear ring 241 for transmission.

[0092] A limiting lever 243 is detachably installed on the end wall of the adjusting gear 242, and a limiting anti-slip roller 244 is fixedly installed at the end of the limiting lever 243.

[0093] In this embodiment, the number of adjusting gears 242 can be 3-6 sets, and the adjusting gears 242 are rotatably connected to the inner protective cover 222 through bearings. The limiting lever 243 can be an "L" shaped lever or a "V" shaped lever structure, and the limiting anti-slip roller 244 can be a round roller or a round rod with anti-slip grooves on its surface.

[0094] When it is necessary to clamp and limit the high and low voltage connecting cables 43 of different specifications during operation, the adjusting gear ring 241 is manually rotated. The adjusting gear ring 241 drives the adjusting gear 242 to rotate synchronously, thereby causing the adjusting gear 242 to drive the limit lever 243 and the limit anti-slip roller 244 to swing, thus realizing the stable clamping and limiting of the high and low voltage connecting cables 43.

[0095] In this embodiment of the invention, a cable limiting part 24 is provided. The cable limiting part 24 can support and limit the high and low voltage connecting cables 43 of different specifications, thereby ensuring the normal operation of the high and low voltage connecting cables 43 and avoiding the phenomenon of the high and low voltage connecting cables 43 becoming loose or falling off when switching between high and low voltage.

[0096] In a further preferred embodiment of the present invention, such as Figures 9-10 As shown, the explosion-proof protection unit 23 includes:

[0097] An explosion-proof rack 231 is fixedly connected to an inner protective cover 222, and a rack positioning rod 235 is fixedly connected to one end of the explosion-proof rack 231 away from the inner protective cover 222. The rack positioning rod 235 is slidably connected to the switching heat dissipation groove 224.

[0098] At least one set of driven gears 232 are rotatably mounted on the inner wall of the outer heat sink 221, and the driven gears 232 mesh with the explosion-proof rack 231 for transmission. A limit swing arm 236 is fixedly mounted on the driven gears 232.

[0099] It should be noted that the explosion-proof rack 231 is fixedly connected to the outer wall of the inner protective cover 222 by plugging or tenoning, and the ends of the explosion-proof rack 231 and the rack positioning rod 235 are connected by threads or snaps. The setting of the heat dissipation slot 224 realizes the guiding and limiting of the rack positioning rod 235. The driven gear 232 is symmetrically arranged on both sides of the explosion-proof rack 231. The driven gear 232 is rotatably connected to the outer heat dissipation cover 221 through bearings. One end of the limiting swing arm 236 is fixedly connected to the driven gear 232 through snaps or fastening bolts.

[0100] A limiting speed reducer 233 is fixedly connected to the end of the limiting swing arm 236;

[0101] A limiting spring 234 is embedded in the limiting speed reducer 233. One end of the limiting spring 234 away from the limiting speed reducer 233 extends into the switching heat dissipation groove 224 and is fixedly connected to the inner wall of the switching heat dissipation groove 224.

[0102] In this embodiment, the limiting deceleration disk 233 can be a hollow disk or a round seat, while the limiting spring 234 is fixed in the switching heat dissipation slot 224 by riveting or welding.

[0103] When a flash explosion or explosion occurs, the ejected material impacts the inner protective cover 222, causing the inner protective cover 222 to move the explosion-proof rack 231. The explosion-proof rack 231 then drives the driven gear 232 to rotate, which in turn drives the limiting swing arm 236 and the limiting deceleration disc 233 to swing. This causes the limiting deceleration disc 233 to compress the limiting spring 234, thereby achieving deceleration and splash protection of the ejected material.

[0104] In this embodiment of the invention, an explosion-proof protection unit 23 is provided. The explosion-proof protection unit 23, through the coordinated operation of the explosion-proof rack 231, the driven gear 232, the limiting reducer 233, and the limiting spring 234, achieves shock absorption protection for the inner protective cover 222 and the high and low voltage connecting cable 43, preventing the high and low voltage connecting cable 43 from becoming loose during high and low voltage switching. It can also protect the high and low voltage power distribution assembly 4 in the event of flash explosion or electric arc flash, preventing damage to the high and low voltage power distribution assembly 4.

[0105] In a further preferred embodiment of the present invention, such as Figures 11-12 As shown, the embodiment of the present invention also includes a heat dissipation and dust removal mechanism 3, which is disposed at the bottom of the high voltage transformer 41 and is used to perform heat dissipation and dust removal protection on the high voltage transformer 41.

[0106] In this embodiment of the invention, a heat dissipation and dust removal mechanism 3 is provided. The heat dissipation and dust removal mechanism 3 consists of a negative pressure exhaust section 31, a dust guide section 34, and an auxiliary heat collection section 32. The negative pressure exhaust section 31, the dust guide section 34, and the auxiliary heat collection section 32 work together to fully absorb the heat generated by the high-voltage transformer 41 during operation, thereby providing heat dissipation protection for the high-voltage transformer 41. At the same time, it can also fully adsorb the dust adsorbed around the high-voltage transformer 41, avoiding excessive dust accumulation that could lead to a decrease in insulation performance, short circuit accidents, or partial discharge of the transformer that could generate electric sparks.

[0107] The heat dissipation and dust removal mechanism 3 includes:

[0108] A heat dissipation and dust removal base 33 is fixedly installed inside the cabinet shell 11, and at least one set of heat dissipation and dust removal grooves 331 are provided on the heat dissipation and dust removal base 33.

[0109] In this embodiment, the heat dissipation and dust removal base 33 can be a rectangular base or a round base, and an exhaust pipe extending to the outside of the cabinet shell 11 can be provided at the bottom of the heat dissipation and dust removal base 33. The exhaust pipe is used to assist in the discharge of heat and dust, while the heat dissipation and dust removal grooves 331 are circumferentially arranged on the upper part of the heat dissipation and dust removal base 33.

[0110] Negative pressure exhaust unit 31, which is disposed at the bottom of heat dissipation and dust removal base 33;

[0111] Dust guiding section 34 is disposed in heat dissipation and dust removal tank 331. The dust guiding section 34 is used to guide the sucked dust and accelerate the dust flow.

[0112] An auxiliary heat collector 32 is disposed inside the heat dissipation and dust removal base 33. The auxiliary heat collector 32 is used to help absorb the heat generated by the high-voltage transformer 41 during operation.

[0113] In this embodiment, the negative pressure exhaust unit 31 includes:

[0114] The exhaust motor 311 is fixedly installed at the bottom of the heat dissipation and dust removal base 33;

[0115] At least one set of negative pressure exhaust fans 312, wherein the negative pressure exhaust fans 312 are fixedly mounted on the output shaft of the exhaust motor 311.

[0116] In this embodiment, the exhaust motor 311 is fixed to the bottom of the heat dissipation and dust removal base 33 by means of fastening bolts or welding, while the negative pressure exhaust fan 312 can be a fan-shaped, rectangular or spiral structure, and the negative pressure exhaust fan 312 is fixedly connected to the output shaft of the exhaust motor 311 by means of fastening bolts or buckles.

[0117] In a further preferred embodiment of the present invention, such as Figure 11 As shown, the auxiliary heat collection unit 32 includes:

[0118] Auxiliary heat collection plate 321 is fixedly installed on heat dissipation and dust removal base 33;

[0119] At least one set of auxiliary heat collection tanks 322 are formed inside the auxiliary heat collection plate 321;

[0120] At least one set of auxiliary heat-absorbing rods 323 are provided, which are detachably installed in the auxiliary heat collection tank 322. The auxiliary heat-absorbing rods 323 are used to help absorb the heat generated by the high-voltage transformer 41 during operation.

[0121] In this embodiment, the auxiliary heat collection plate 321 can be a spiral or curved rectangular plate structure, and the auxiliary heat collection grooves 322 are arranged in a matrix on the auxiliary heat collection plate 321. The auxiliary heat collection plate 321 is fixedly connected to the heat dissipation and dust removal seat 33 by snap-fit ​​or fastening bolts. The auxiliary heat collection grooves 322 can be circular grooves, square grooves, rhomboid grooves or hexagonal groove structures, and the auxiliary heat absorption rods 323 can be bent spiral rods or "U"-shaped rod structures. The auxiliary heat absorption rods 323 are fixedly installed in the auxiliary heat collection grooves 322 by plugging or snap-fit. The auxiliary heat absorption rods 323 are made of aluminum alloy or Parker glass, which are easy to absorb heat.

[0122] In a further preferred embodiment of the present invention, such as Figures 13-15 As shown, the dust guide section 34 includes:

[0123] Arc-shaped flow guide seat 341, which is detachably installed in the heat dissipation and dust removal groove 331;

[0124] A dust diversion ball 342 is fixedly installed inside the arc-shaped guide seat 341.

[0125] In this embodiment, the arc-shaped flow guide seat 341 is an arc-shaped seat that is narrow at the top and wide at the bottom, and the bottom of the arc-shaped flow guide seat 341 is curved. A through groove is opened on the bottom side wall of the arc-shaped flow guide seat 341. The arc-shaped flow guide seat 341 is installed in the heat dissipation and dust removal groove 331 by means of threads or snaps. The dust guiding ball 342 is installed in the arc-shaped flow guide seat 341 by means of threads or snaps. The surface of the dust guiding ball 342 is polished.

[0126] The heated expansion seat 343 is fixedly installed inside the arc-shaped flow guide seat 341. The heated expansion seat 343 is used to absorb the heat of the dust and expand, thereby changing the cavity volume of the arc-shaped flow guide seat 341 and increasing the flow rate of the dust inside the arc-shaped flow guide seat 341.

[0127] At least one set of heat-collecting fins 344, which are detachably installed in the heat-receiving expansion seat 343.

[0128] In this embodiment, the thermal expansion seat 343 can be a cylindrical or cylindrical structure. The thermal expansion seat 343 is made of polymethyl methacrylate (PMMA) or carbon fiber, while the heat collecting fins 344 are made of aluminum alloy. The heat collecting fins 344 have dovetail grooves inside, which facilitates the thermal expansion of the thermal expansion seat 343 and thus achieves the purpose of increasing the internal pressure of the arc-shaped flow guide seat 341.

[0129] When in operation, the exhaust motor 311 is turned on, which drives the negative pressure exhaust fan 312 to rotate, thereby drawing the dust adsorbed around the high-voltage transformer 41 into the arc-shaped flow guide seat 341. Then, the thermal expansion seat 343 expands due to heat, increasing the internal pressure of the arc-shaped flow guide seat 341 and accelerating the flow of dust. At the same time, the auxiliary heat absorption rod 323 fully absorbs the dust and the heat generated by the high-voltage transformer 41, thus achieving heat dissipation protection for the high-voltage transformer 41.

[0130] In this embodiment of the invention, a dust guiding section 34 is provided. The dust guiding section 34 can not only guide the dust and facilitate the collection and discharge of the dust, but also reduce the internal volume when heated, thereby changing the internal pressure, increasing the dust flow speed, and further improving the dust removal efficiency.

[0131] In summary, the present invention provides a high- and low-voltage complete switchgear. During operation, the high-voltage transformer 41 and the low-voltage circuit breaker 42 are activated to distribute high-voltage electrical energy. After being stepped down by the high-voltage transformer 41, the current is transmitted through the high- and low-voltage connecting cable 43 and then further distributed by the low-voltage section to various electrical equipment or control boxes in the high- and low-voltage power distribution components 4. At the same time, the switching combination cover 22, the cable limiting part 24, and the explosion-proof protection part 23 in the switching protection mechanism 2 limit and protect the high- and low-voltage connecting cable 43 to prevent dangerous jetting or explosion phenomena caused by leakage of the high- and low-voltage connecting cable 43 in the high-voltage environment during high- and low-voltage switching.

[0132] In this embodiment of the invention, a switching protection mechanism 2 is provided. The switching protection mechanism 2 consists of a switching combination cover 22, a cable limiting part 24, and an explosion-proof protection part 23. The switching combination cover 22 and the explosion-proof protection part 23 work together to limit and protect the high-voltage and low-voltage connecting cable 43, so as to avoid dangerous jets or explosions caused by leakage of the high-voltage and low-voltage connecting cable 43 in the high-voltage environment during high-voltage switching.

[0133] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0134] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions are also within the scope of protection of the present invention.

Claims

1. A high- and low-voltage switchgear, the high- and low-voltage switchgear comprising: The main body of the power distribution cabinet (1) includes a cabinet shell (11) and a cabinet base (12). The cabinet shell (11) is fixedly installed on the cabinet base (12), and a working cavity (13) is provided inside the cabinet shell (11). High and low voltage power distribution assembly (4), the high and low voltage power distribution assembly (4) is set in the working chamber (13), the high and low voltage power distribution assembly (4) includes a high voltage transformer (41), a low voltage circuit breaker (42), and a high and low voltage connecting cable (43). The high voltage transformer (41) and the low voltage circuit breaker (42) are respectively set in the working chamber (13), and the high voltage transformer (41) and the low voltage circuit breaker (42) are respectively detachably connected to the cabinet shell (11). The two ends of the high and low voltage connecting cable (43) are respectively electrically connected to the high voltage transformer (41) and the low voltage circuit breaker (42). The switching protection mechanism (2) is characterized in that the switching protection mechanism (2) is set inside the working chamber (13), the switching protection mechanism (2) is sleeved on the outside of the high and low voltage connecting cable (43), and the switching protection mechanism (2) is used to provide explosion-proof and limiting protection for the high and low voltage connecting cable (43) when switching between high and low voltage. The switching protection mechanism (2) includes: The protection mechanism mounting base (21) is fixedly installed inside the cabinet shell (11); At least one set of switching combination covers (22) are provided, the switching combination covers (22) are detachably mounted on the protection mechanism mounting base (21), and the switching combination covers (22) are sleeved on the outside of the high and low voltage connection cables (43); A cable limiting part (24) is provided on the switching assembly cover (22). The cable limiting part (24) is used to limit and protect the high and low voltage connecting cables (43). At least one set of explosion-proof protection unit (23) is provided inside the switching combination cover (22) to protect the high and low voltage connection cable (43) and to protect the high voltage transformer (41) and low voltage circuit breaker (42) in the event of flash explosion; The switching combination cover (22) includes: An external heat dissipation cover (221) is hollow inside, and at least one set of switching heat dissipation slots (224) are provided on the side wall of the external heat dissipation cover (221). An inner protective cover (222) is installed inside the outer heat dissipation cover (221), and the inner protective cover (222) is fixedly connected to the outer heat dissipation cover (221) by at least one set of elastic support rods (223); The explosion-proof protection unit (23) includes: An explosion-proof rack (231) is fixedly connected to an inner protective cover (222), and a rack positioning rod (235) is fixedly connected to one end of the explosion-proof rack (231) away from the inner protective cover (222), and the rack positioning rod (235) is slidably connected to the switching heat dissipation groove (224). At least one set of driven gears (232) are rotatably mounted on the inner wall of the outer heat sink (221), and the driven gears (232) mesh with the explosion-proof rack (231). A limit swing arm (236) is fixedly mounted on the driven gears (232). A limiting speed reducer (233) is fixedly connected to the end of the limiting swing arm (236); A limiting spring (234) is embedded in the limiting speed reducer (233). One end of the limiting spring (234) away from the limiting speed reducer (233) extends into the switching heat dissipation groove (224) and is fixedly connected to the inner wall of the switching heat dissipation groove (224). It also includes a heat dissipation and dust removal mechanism (3), which includes a heat dissipation and dust removal seat (33), a negative pressure exhaust section (31), a dust guide section (34), and an auxiliary heat collection section (32). The dust guide section (34) includes an arc-shaped guide seat (341), a dust diversion ball (342), a heat expansion seat (343), and heat collection fins (344). The cable limiting part (24) includes: Adjusting gear ring (241), the adjusting gear ring (241) is rotatably installed in the inner protective cover (222), and the inner protective cover (222) is provided with a pawl for locking the adjusting gear ring (241), the pawl is rotatably connected to the inner protective cover (222) through a limiting torsion spring; At least one set of adjusting gears (242) are rotatably mounted on the side wall of the inner protective cover (222), and the adjusting gears (242) mesh with the adjusting gear ring (241); A limiting lever (243) is detachably installed on the end wall of the adjusting gear (242), and a limiting anti-slip roller (244) is fixedly installed at the end of the limiting lever (243). It also includes a heat dissipation and dust removal mechanism (3), which is located at the bottom of the high voltage transformer (41) and is used to provide heat dissipation and dust removal protection for the high voltage transformer (41). The heat dissipation and dust removal mechanism (3) includes: Heat dissipation and dust removal seat (33), which is fixedly installed inside the cabinet shell (11), and at least one set of heat dissipation and dust removal grooves (331) are provided on the heat dissipation and dust removal seat (33). Negative pressure exhaust unit (31), the negative pressure exhaust unit (31) is located at the bottom of heat dissipation and dust removal base (33); Dust guiding section (34) is provided in heat dissipation dust removal tank (331). The dust guiding section (34) is used to guide the dust drawn in and accelerate the dust flow. An auxiliary heat collection unit (32) is installed inside the heat dissipation and dust removal base (33). The auxiliary heat collection unit (32) is used to help absorb the heat generated by the high voltage transformer (41) during operation.

2. The high and low voltage switchgear as described in claim 1, characterized in that: The negative pressure exhaust unit (31) includes: An exhaust motor (311) is fixedly installed at the bottom of the heat dissipation and dust removal base (33); At least one set of negative pressure exhaust fans (312) are fixedly mounted on the output shaft of the exhaust motor (311).

3. The high and low voltage switchgear as described in claim 2, characterized in that: The auxiliary heat collection unit (32) includes: An auxiliary heat collection plate (321) is fixedly installed on a heat dissipation and dust removal base (33); At least one set of auxiliary heat collection tanks (322) are provided inside the auxiliary heat collection plate (321); At least one set of auxiliary heat absorbers (323) are provided. The auxiliary heat absorbers (323) are detachably installed in the auxiliary heat collection tank (322). The auxiliary heat absorbers (323) are used to help absorb the heat generated when the high voltage transformer (41) is working.

4. The high and low voltage switchgear as described in claim 3, characterized in that: The dust guide section (34) includes: Arc-shaped flow guide seat (341), which can be detachably installed in the heat dissipation and dust removal groove (331); A dust diversion ball (342) is fixedly installed inside the arc-shaped flow guide seat (341).

5. The high and low voltage switchgear as described in claim 4, characterized in that: The dust guide section (34) further includes: The heat-expanding seat (343) is fixedly installed inside the arc-shaped flow guide seat (341), and the heat-expanding seat (343) is used to absorb the heat of the dust and expand, and change the cavity volume of the arc-shaped flow guide seat (341) to increase the dust flow rate inside the arc-shaped flow guide seat (341). At least one set of heat-collecting fins (344) are detachably installed inside the heat-receiving expansion seat (343).

Images