Short-circuit protection type high-low voltage power distribution cabinet

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a short-circuit protection type high-low voltage power distribution cabinet which comprises a transmission module, a control box, a temperature sensor, a blocking frame part, a bearing part and a cabinet body, a cabinet door part is installed on the front side of the cabinet body, the cabinet body comprises a main box part, an upper storage part is installed on the upper side of the main box part, and the main box part comprises a box body. Slots are formed in the left side and the right side of the box body, heat dissipation grid openings are formed in the opposite sides of one group of slots, and sliding grooves are formed in the upper sides of the slots. Through the arrangement of the cabinet body, the cabinet door part, the transmission module, the connecting rope, the temperature sensor and other structures, the short circuit protection type high-low voltage power distribution cabinet can automatically seal the cabinet body when arc light short circuit occurs, external oxygen is prevented from entering, and flames caused by arc light short circuit are rapidly extinguished along with oxygen exhaustion.

Description

Technical Field

[0001] The present application relates to the technical field of power distribution cabinets, and specifically to a short-circuit protection type high and low voltage power distribution cabinet. Background Art

[0002] As the name implies, high and low voltage distribution cabinets are distribution equipment used for power distribution, control, metering and cable connection in the power supply system. Generally, power supply bureaus and substations use high voltage switch cabinets, which are then stepped down by transformers and led out to low voltage distribution cabinets. The low voltage distribution cabinets are then led to the distribution boards, control boxes and switch boxes of various power users. The equipment in the distribution device is a combination of switches, circuit breakers, fuses, buttons, indicator lights, meters, wires and other protective devices that are assembled into one to meet the design functional requirements.

[0003] Existing high and low voltage distribution cabinets generally use circuit breakers, fuses and other protective devices for short circuit protection, but when an arc short circuit occurs, a high temperature and high pressure arc will be generated. This high temperature is enough to ignite the surrounding flammable materials, such as insulating materials, cable sheaths, etc., thereby causing a fire. Even if the circuit breaker will act quickly to cut off the circuit when it detects current abnormality, in some cases, the response speed of the circuit breaker may not be able to fully keep up with the high temperature and high pressure speed generated by the arc short circuit, or the circuit breaker itself has a fault that makes it impossible to cut off the circuit, all of which may lead to the occurrence of combustion. Therefore, in the electrical system, in addition to relying on circuit breakers for protection, other measures are also needed to deal with combustion caused by arc short circuits. Therefore, based on the above problems, a short circuit protection high and low voltage distribution cabinet is proposed. Summary of the invention

[0004] The purpose of the present application is to provide a short-circuit protection type high and low voltage distribution cabinet to solve the problem that the existing high and low voltage distribution cabinets generally use protection devices for short-circuit protection, but the response speed of the protection device may not be able to fully keep up with the high temperature and high pressure speed generated by the arc short circuit, or the circuit breaker itself has a fault that makes it impossible to cut off the circuit, which may cause combustion and damage to electrical equipment.

[0005] To achieve the above objectives, this application provides the following technical solutions: A short-circuit protection type high and low voltage power distribution cabinet, comprising a transmission module, a control box, a temperature sensor, a frame part, a bearing part and a cabinet body, wherein a cabinet door part is installed on the front side of the cabinet body, the cabinet body comprises a main box part, an upper storage part is installed on the upper side of the main box part, the main box part comprises a box body, slots are provided on the left and right sides of the box body, a group of opposite sides of the slots are provided with heat dissipation grilles, a slide groove is provided on the upper side of the slots, a through rail is connected between the slide groove and the slot, the inner side of the through rail is slidably connected to a card frame located on the inner side of the slide groove and the slot, the inner side of the through rail is slidably connected to a sealing plate matched with the card frame, and a group of countersunk holes on the opposite sides of the sealing plate are fixed The cabinet is fixedly connected with an external magnetic block, the cabinet door part includes a seat shell fixed on the lower side of the cabinet, the inner side of the seat shell is slidably connected with a guide plug-in base plate, the front upper part of the guide plug-in base plate is fixedly connected with a door panel that fits with the front end surface of the cabinet, the rear end surface of the door panel is fixedly connected with a front sealing plate on the inner side of the cabinet, both sides of the rear end surface of the door panel are fixedly connected with plug-ins inserted into the inner side of the slot, and a card slot is provided on one side of the plug-in plate close to the heat dissipation grille, transmission modules are installed on the left and right inner walls of the box, a connecting rope is installed between a group of the transmission modules, a control box is installed on the left inner wall of the box, and temperature sensors are installed on the upper and lower sides of the left and right inner walls of the box.

[0006] Preferably, the transmission module includes a rail shell fixedly connected to the inner wall of the box body, the inner side of the rail shell is slidably connected with an inner magnetic block laterally aligned with the outer magnetic block, a through opening is opened in the front side plate surface of the rail shell, the front side of the rail shell is fixedly connected with a seat strip located at the lower side of the through opening, the upper end surface of the seat strip is fixedly connected with a group of two separately arranged guide rings, the front end of the seat strip is fixedly connected with a protrusion, a transmission rod is installed on the inner side of a group of the guide rings, the transmission rod includes a rod body slidably connected to the ring hole of the guide ring, the rear end of the rod body is fixedly connected with a The blocking block has a connecting block fixedly connected to the front end of the rod body, a rope ring is fixedly connected to the side plane end of the connecting block, a tension spring is fixedly connected between the front end surface of the connecting block and the rear end surface of the protrusion, a blocking and cutting portion is fixedly connected to the side of the seat bar away from the inner wall of the box body, and the blocking and cutting portion includes a blocking block, a square opening is opened on the inner side of the blocking block, a fixing frame is fixedly connected to the front side of the blocking block, an electric push rod is fixedly connected to the inner side of the hole of the fixing frame, and the driving rod of the electric push rod is fixedly connected to a cutting knife on the inner side of the square opening, and a connecting rope on the rear side of the blocking block is installed between a group of rope rings.

[0007] Preferably, the card frames are inserted into the inner side of the card slots, the card frames are composed of a seat plate with a groove and card strips on both sides, the sealing plate is composed of a counterweight convex strip and a plate body, the counterweight convex strip of the sealing plate is arranged in the seat plate slot of the card frame, and the plate body of the sealing plate is arranged between a group of card strips of the card frame.

[0008] Preferably, the width dimension of the heat dissipation grille is smaller than the width dimension of the through rail, the width dimension of the card frame and the sealing plate after assembly is larger than the width dimension of the heat dissipation grille, a spacing is provided between the protrusion and the connecting block, the temperature sensor is electrically connected to the control box, and the control box is electrically connected to the electric push rod.

[0009] Preferably, a filter is fixedly connected to the inner side of the circular opening of the plug plate, and the filter is arranged on the left and right sides of a group of heat dissipation grille openings. The filter and the heat dissipation grille openings are arranged to be laterally aligned, and scrapers are fixedly connected to the left and right sides of the cabinet, and the facing surfaces of a group of scrapers are in contact with the outer end surface of the plug plate.

[0010] Preferably, the upper storage part includes a storage shell fixedly connected to the box body, a dry powder storage chamber is provided on the inner side of the storage shell, a paper replacement port is provided on the left side of the dry powder storage chamber, a rail port is provided on the lower front part of the dry powder storage chamber, an opening is provided on the lower middle part of the dry powder storage chamber, a normally closed feeding head is fixedly connected to the left hole of the storage shell, and the retaining frame part includes a group of two folding rods fixedly connected to the inner magnetic block, the upper ends of the folding rods are rotatably connected to rotating parts, and the upper side of one group of the rotating parts is fixedly connected to a normally closed feeding head in an open position. A baffle plate on the inner side of the paper changing opening, a push bar on the rear side of the folding rod is fixedly connected to the lower side of the baffle plate, a counterweight rod is fixedly connected to the inner side of the groove of the push bar, a bearing part is installed on the inner side of the upper storage part, the bearing part includes a push-pull plate on the inner side of the paper changing opening, a grid plate on the inner side of the dry powder storage cavity is fixedly connected to the lower right side of the push-pull plate, a pad paper is arranged on the upper side of the grid plate, a push-pull block is fixedly connected to the left side of the push-pull plate, and a rail plate slidably connected to the rail opening is fixedly connected to the rear side of the door panel.

[0011] Preferably, the lower end surface of the track plate fits with the upper end surface of the front sealing plate, the outer end surface of the track plate fits with the inner wall of the track mouth, the front and rear lower end surfaces of the front sealing plate fit with the inner wall of the box body, the outer end surface of the baffle plate fits with the inner wall of the opening, the baffle plate and the track plate are both arranged on the lower side of the padding paper, and the normally closed feeding head consists of a tube body and a tube cover spirally connected to the tube body.

[0012] Compared with the prior art, the beneficial effects of this application are: 1. In the present application, by providing structures such as a cabinet, a cabinet door, a transmission module, a connecting rope and a temperature sensor, the door panel, the front sealing panel and the rail panel of the cabinet door can seal the front side of the cabinet, and the load-bearing portion can seal the upper storage position, i.e., the upper side of the cabinet, so that the electrical equipment installed in the cabinet can dissipate heat through the heat dissipation grilles on both sides. When an arc short circuit occurs during the operation of the electrical equipment in the cabinet, the protective devices in the cabinet, such as the circuit breaker, will immediately cut off the power supply to each electrical equipment. At the same time, the high temperature caused by the arc will be detected as abnormal by the temperature sensor, and the temperature sensor will send a The control box sends an electrical signal to control the control box to extend the electric push rods of each blocking and cutting part, so that the extended electric push rod can drive the cutter to pass through the square opening to cut the connecting rope. The connection rope and the stop block lose the limit on the transmission rod, so that the tension spring can be reset to pull the transmission rod forward, so that the block of the transmission rod is separated from the rail shell at the through opening. Since the block loses the limit on the inner magnetic block, the inner magnetic block can move downward. At this time, the sealing baffle plate with the inner and outer magnetic blocks positioned in the slide groove can be moved downward by the weight and gravity of the plate body and the counterweight convex strip, inserted into the inner side of the slot and assembled with the card frame. The assembled card frame and sealing baffle can seal the heat dissipation grille openings on both sides of the cabinet. At this time, the cabinet will be in a sealed state. If the electrical equipment in the cabinet burns due to arc short circuit, the limited oxygen in the cabinet cannot support its long-term combustion and expansion of combustion. The flame will go out as the oxygen is exhausted, reducing the damage to the electrical equipment caused by the flame caused by the short circuit. On the other hand, if the temperature sensor, control box or electric push rod fails due to a fault, the arc of the arc short circuit or the arc burning can also directly disconnect the connecting rope to move the transmission rod forward, so that the inner magnetic block, the outer magnetic block and the sealing The baffle moves downward to seal the heat dissipation grille of the cabinet, so that the cabinet is in a sealed state, and the short-circuit protection high and low voltage distribution cabinet can automatically seal the cabinet when an arc short circuit occurs, preventing the entry of external oxygen, so that the flame caused by the arc short circuit is quickly extinguished as the oxygen is exhausted, which solves the problem that the existing high and low voltage distribution cabinets generally use protective devices for short circuit protection, but the response speed of the protective device may not be able to fully keep up with the high temperature and high pressure speed generated by the arc short circuit, or the circuit breaker itself has a fault that makes it impossible to cut off the circuit, which will cause combustion and damage to electrical equipment; 2. In the present application, the transmission module, the retaining frame, the bearing portion and the upper storage portion are arranged so that the bearing portion is installed on the inner side of the upper storage portion, so that the grid plate and the padding paper of the bearing portion can bear the dry powder in the dry powder storage chamber. When an arc short circuit occurs in the electrical equipment in the cabinet and the transmission rod moves forward to cause the inner magnetic block to lose its limit, the retaining frame will drive the inner magnetic block to move downward due to the influence of gravity, so that the shielding plate of the retaining frame will be separated from the opening. Due to the arrangement of the support bar and the counterweight rod, the weight of the shielding plate is unbalanced, so that the shielding plate separated from the opening will tilt toward the depth of the cabinet, i.e., the installation place of the electrical equipment, and at the same time, the opening will be opened to expose the padding paper of the bearing portion. When the electrical equipment in the cabinet is short-circuited by arc When the combustion caused by the optical short circuit becomes larger and larger and is not effectively controlled, the flame will ignite the padding paper on the upper side of the opening, causing the dry powder carried on the upper side of the padding paper to pass through the opening and be guided by the baffle plate to dump toward the burning electrical equipment. The flame can be extinguished or effectively controlled by the large amount of dry powder dumped, thereby achieving the goal that the short-circuit protection high and low voltage distribution cabinet can quickly extinguish or effectively control large-scale flames when the combustion caused by the arc short circuit is not effectively controlled, solving the problem that the existing short-circuit protection high and low voltage distribution cabinet is difficult to quickly control large-scale flames when the combustion caused by the arc short circuit is not effectively controlled, causing further losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the structure of the cabinet in this application; Figure 3 This is a schematic diagram of the structure of the main box of this application; Figure 4 This is a schematic diagram of the structure of the storage unit of this application; Figure 5 This is a schematic diagram of the structure after the card frame and the sealing baffle are assembled in this application; Figure 6 For this application Figure 5 A structural diagram from another perspective; Figure 7 This is a schematic diagram of the structure of the cabinet door part of this application; Figure 8 For this application Figure 7 Schematic diagram of the split structure; Fig. 9 For this application Figure 1 A schematic diagram of the structure without the cabinet door portion; Fig.10 For this application Fig. 9 Another perspective structural diagram of; Fig.11 For this application Figure 1 A schematic cross-sectional structure diagram of ; Fig.12 For this application Fig.11 Another perspective structural diagram of; Fig.13 This is a schematic diagram of the structure of the transmission module of this application; Fig.14 For this application Fig.13 A schematic diagram of the structure at A; Fig.15 This is a schematic diagram of the structure of the transmission rod of this application; Fig.16 This is a schematic diagram of the structure of the cutting portion of the present application; Fig.17 This is a schematic diagram of the structure of the retaining frame part of this application; Fig.18 For this application Fig.17 Schematic diagram of the structure at B; Fig.19 For this application Fig.17 Schematic diagram of the structure after the action; Fig. 20 This is a schematic diagram of the structure of the bearing part of this application.

[0014] In the figure: 1, cabinet; 11, main box; 111, box; 112, slot; 113, heat dissipation grille; 114, slide; 115, rail; 12, upper storage; 121, storage shell; 122, dry powder storage chamber; 123, rail mouth; 124, opening; 125, paper change port; 126, normally closed feeding head; 13, card frame; 14, baffle plate; 15, external magnetic block; 16, scraper; 2, cabinet door; 21, seat shell; 22, guide bottom plate; 23, door plate; 24, front sealing plate; 25, plug plate; 26, card slot; 27, filter screen; 28, rail plate; 3, transmission module; 31, rail shell; 32, inner Magnetic block; 33, through-hole; 34, seat strip; 35, guide ring; 36, protrusion; 37, transmission rod; 371, rod body; 372, block; 373, connecting block; 374, rope ring; 38, tension spring; 39, cutting block; 391, stop block; 392, square mouth; 393, fixing frame; 394, electric push rod; 395, cutter; 4, connecting rope; 5, control box; 6, temperature sensor; 7, stop frame; 71, folding rod; 72, rotating part; 73, shielding plate; 74, stop strip; 75, counterweight rod; 8, bearing part; 81, push-pull plate; 82, grid plate; 83, pad paper; 84, push-pull block. DETAILED DESCRIPTION

[0015] See also Figure 1-20 , this application provides a technical solution: A short-circuit protection type high and low voltage power distribution cabinet, comprising a transmission module 3, a control box 5, a temperature sensor 6, a retaining frame part 7, a bearing part 8 and a cabinet body 1, wherein a cabinet door part 2 is installed on the front side of the cabinet body 1, the cabinet body 1 comprises a main box part 11, an upper storage part 12 is installed on the upper side of the main box part 11, the main box part 11 comprises a box body 111, slots 112 are provided on the left and right sides of the box body 111, a group of slots 112 are provided with heat dissipation grilles 113 on the opposite sides, a slide groove 114 is provided on the upper side of the slot 112, a through rail 115 is connected between the slide groove 114 and the slot 112, the inner side of the through rail 115 is slidably connected to a card frame 13 located on the inner side of the slide groove 114 and the slot 112, and the inner side of the through rail 115 is slidably connected to a card frame 13 matched with the card frame 13 The baffle plate 14, a group of baffle plates 14 are fixedly connected with external magnetic blocks 15 in the countersunk holes on the opposite sides, the cabinet door part 2 includes a seat shell 21 fixed to the lower side of the cabinet 1, the inner side of the seat shell 21 is slidably connected with a guide plug-in bottom plate 22, the front upper part of the guide plug-in bottom plate 22 is fixedly connected with a door panel 23 that fits the front end surface of the cabinet 1, the rear end surface of the door panel 23 is fixedly connected with a front sealing plate 24 on the inner side of the cabinet 1, and both sides of the rear end surface of the door panel 23 are fixedly connected with plug-ins 25 inserted into the inner side of the slot 112, and a card slot 26 is provided on one side of the plug-in plate 25 close to the heat dissipation grille 113, the left and right inner walls of the box 111 are installed with transmission modules 3, a connecting rope 4 is installed between a group of transmission modules 3, and the left inner wall of the box 111 is installed with a control Box 5, temperature sensors 6 are installed on the upper and lower sides of the left and right inner walls of the box body 111, the transmission module 3 includes a rail shell 31 fixedly connected to the inner wall of the box body 111, the inner side of the rail shell 31 is slidably connected to the inner side of the inner magnetic block 32 which is laterally aligned with the outer magnetic block 15, a through opening 33 is opened in the front side plate of the rail shell 31, the front side of the rail shell 31 is fixedly connected to a seat bar 34 located at the lower side of the through opening 33, the upper end surface of the seat bar 34 is fixedly connected to a group of two separately arranged guide rings 35, the front end of the seat bar 34 is fixedly connected to a protrusion 36, a transmission rod 37 is installed on the inner side of a group of guide rings 35, the transmission rod 37 includes a rod body 371 slidably connected to the ring hole of the guide ring 35, and the rear end of the rod body 371 is fixedly connected to a rod body 371 which passes through the through opening 33 and is located at the inner magnetic block 32 The blocking block 372 at the lower side, the front end of the rod body 371 is fixedly connected with a connecting block 373, the side plane end of the connecting block 373 is fixedly connected with a rope ring 374, a tension spring 38 is fixedly connected between the front end surface of the connecting block 373 and the rear end surface of the protrusion 36, and the side of the seat bar 34 away from the inner wall of the box body 111 is fixedly connected with a blocking and cutting portion 39, the blocking and cutting portion 39 includes a stop block 391, a square opening 392 is opened on the inner side of the stop block 391, the front side of the stop block 391 is fixedly connected with a fixing frame 393, the inner side of the hole of the fixing frame 393 is fixedly connected with an electric push rod 394, the driving rod of the electric push rod 394 is fixedly connected with a cutter 395 located on the inner side of the square opening 392, and a connecting rope 4 located on the rear side of the stop block 391 is installed between a group of rope rings 374.The connecting rope 4 provided can be used as a starting end. The disconnection of the connecting rope 4 will cause the block 391 to no longer limit the transmission rod 37. The transmission rod 37 will move forward through the tension of the tension spring 38, so that the block 372 of the transmission rod 37 will no longer limit the inner magnetic block 32, so that the inner magnetic block 32, the outer magnetic block 15 and the sealing plate 14 can move downward to seal the heat dissipation grille 113, so that the cabinet 1 becomes a sealed state, so that the combustion in the cabinet 1 is quickly extinguished due to limited oxygen; the card frame 13 is inserted into the inner side of the card slot 26, and the card frame 13 is composed of a grooved seat plate and card strips on both sides. Through this arrangement, the card frame 13 can position the plug plate 25, and the sealing plate 14 is composed of a counterweight convex strip and a plate body. Through this arrangement, the sealing plate 14 that has lost its limit can be displaced downward by gravity and weight. The counterweight convex strip of the sealing plate 14 is set in the seat plate slot of the card frame 13, and the plate body of the sealing plate 14 is set between a group of card strips of the card frame 13. Through this arrangement, the card frame 13 and the sealing plate 14 can be spliced; the width dimension of the heat dissipation grille 113 is smaller than the width dimension of the through rail 115, and the width dimension of the spliced ​​card frame 13 and the sealing plate 14 is larger than the width dimension of the heat dissipation grille 113 The card frame 13 and the sealing plate 14 after being assembled can completely seal the heat dissipation grille 113 through this setting. A spacing is set between the protrusion 36 and the connecting block 373. Through this setting, the transmission rod 37 can move forward by a sufficient distance. The temperature sensor 6 is electrically connected to the control box 5, and the control box 5 is electrically connected to the electric push rod 394. Through this setting, the control box 5 can control the action of the electric push rod 394 by receiving the signal of the temperature sensor 6. The inner side of the round mouth of the plug plate 25 is fixedly connected with a filter 27, and the filter 27 is set at a group of heat dissipation grille 113. 3, the filter 27 and the heat dissipation grille 113 are arranged in a horizontal alignment. Through this arrangement, the filter 27 can filter the air flow entering the cabinet 1 to prevent dust from entering the cabinet 1. If the dust contains metal particles, it may cause a short circuit in the electrical equipment. The left and right sides of the cabinet 1 are fixedly connected with scrapers 16. The facing surfaces of a group of scrapers 16 are in contact with the outer end surface of the plug board 25. Through this arrangement, when the cabinet door is disassembled, the plug board 25 will drive the filter 27 to disengage from the slot 112. During the disengagement process, the scraper 16 will clean and scrape off the dust filtered on the surface of the filter 27.

[0016] like Figure 7-Figure 12 , Figure 17-Figure 20As shown, the upper storage part 12 includes a storage shell 121 fixedly connected to the box body 111, a dry powder storage chamber 122 is provided on the inner side of the storage shell 121, a paper replacement port 125 is provided on the left side of the dry powder storage chamber 122, a rail port 123 is provided on the lower front part of the dry powder storage chamber 122, an opening 124 is provided on the lower middle part of the dry powder storage chamber 122, a normally closed feeding head 126 is fixedly connected to the left hole of the storage shell 121, and the retaining frame part 7 includes a group of two folding rods 71 ​​fixedly connected to the inner magnetic block 32, the upper ends of the folding rods 71 ​​are rotatably connected to the rotating parts 72, and the upper sides of a group of rotating parts 72 are fixedly connected to the shielding plate 73 located on the inner side of the opening 124. The lower side of the shielding plate 73 is fixedly connected with a push bar 74 on the rear side of the folding rod 71, and the inner side of the groove of the push bar 74 is fixedly connected to the counterweight rod 75. The inner side of the upper storage part 12 is installed with a bearing part 8, and the bearing part 8 includes a push-pull plate 81 on the inner side of the paper changing port 125. The lower right side of the push-pull plate 81 is fixedly connected with a grid plate 82 on the inner side of the dry powder storage chamber 122. The upper side of the grid plate 82 is provided with a pad paper 83. The left side of the push-pull plate 81 is fixedly connected with a push-pull block 84. The rear side of the door panel 23 is fixedly connected with a rail plate 28 slidably connected to the rail port 123. Through this arrangement, the grid plate 82 of the bearing part 8 can carry the pad paper 83. The pad paper 83 can carry the dry powder. When an arc short circuit occurs, the retaining frame 7 will move downward to expose the pad paper 83 on the upper side of the opening 124. If the fire caused by the short circuit is too large and cannot be effectively controlled, the flame will ignite the pad paper 83. At this time, the dry powder can pass through the opening 124 and be guided by the activated retaining frame 7 to dump the burning electrical equipment, so as to quickly extinguish or control the fire. The lower end surface of the track plate 28 is in contact with the upper end surface of the front sealing plate 24, the outer end surface of the track plate 28 is in contact with the inner wall of the track opening 123, and the front and rear lower end surfaces of the front sealing plate 24 are in contact with the inner wall of the box body 111. Through this arrangement, the track plate 28 is 8. The front sealing plate 24 and the door panel 23 can seal the front side of the cabinet 1. The outer end surface of the baffle plate 73 fits with the inner wall of the opening 124. Through this arrangement, the baffle plate 73 in the opening 124 cannot rotate. The baffle plate 73 and the track plate 28 are both arranged on the lower side of the pad paper 83. Through this arrangement, the baffle plate 73 and the track plate 28 can block the pad paper 83 to prevent the pad paper 83 from being damaged due to other reasons and causing leakage of dry powder. The normally closed feeding head 126 is composed of a tube body and a tube cover spirally connected to the tube body. Through this arrangement, the staff can add dry powder to the dry powder storage chamber 122 through the normally closed feeding head 126.

[0017] Workflow: The operations and actions of the short-circuit protection high and low voltage distribution cabinet in different situations are as follows. Note 1: All electrical equipment is installed on the inner side of the box body 111; Note 2: The installation operation of the cabinet door is as follows: Use the seat shell 21 as a guide to push the guide bottom plate 22, so that the door panel 23, the front sealing plate 24, the plug board 25 and the track plate 28 are displaced toward the cabinet body 1, and the track plate 28 is inserted into the track opening 123, so that the door panel 23 fits the front end surface of the cabinet body 1, and the front sealing plate 24 is inserted into the inner side of the cabinet body 1, and the plug board 25 is inserted into the slot 112. At this time, the card frame 13 is pushed down to move, so that the card frame 13 is inserted into the card slot 26 of the plug board 25, and the door panel 23, the front sealing plate 24, the track plate 28 and the guide bottom plate are limited by the card frame 13 to complete the positioning of the plug board 25. 22 is fixed, and the installation of the cabinet door is completed through the above operations, and the cabinet door can be disassembled by the opposite operation; Note three, when the cabinet door is disassembled, the plug plate 25 will drive the filter screen 27 to disengage from the slot 112, and during the disengagement process, the scraper strip 16 will clean and scrape off the dust filtered on the surface of the filter screen 27; Note four, the operation of replacing the pad paper 83 and adding dry powder is as follows, the push-pull plate 81 is pulled outward by the push-pull block 84, and the outward displacement of the push-pull plate 81 will drive the grid plate 82 to disengage from the dry powder storage chamber 122, at this time, the pad paper 83 can be pasted on the grid plate 82 or the pad paper 83 can be replaced, and the bearing part 8 is reset after completion, and then the dry powder storage chamber 122 is added with dry powder by opening the normally closed feeding head 126, so that the dry powder is stored on the upper side of the pad paper 83;First, the door panel 23, the front sealing panel 24 and the rail panel 28 of the cabinet door portion 2 can seal the front side of the cabinet body 1, and the bearing portion 8 can seal the upper storage portion 12, that is, the upper side of the cabinet body 1, so that the electrical equipment installed in the cabinet body 1 can dissipate heat through the heat dissipation grilles 113 on both sides. When an arc short circuit occurs during the operation of the electrical equipment in the cabinet body 1, the protective devices such as circuit breakers in the cabinet body 1 will immediately cut off the power supply to the electrical equipment. At the same time, the high temperature caused by the arc will be detected as abnormal by the temperature sensor 6, and the temperature sensor 6 will send a telecommunication signal to the control box 5. The control box 5 controls the electric push rods 394 of each cutting portion 39 to extend, so that the extended electric push rods 394 can drive the cutter 395 to pass through the square opening 392 to cut the connecting rope 4. The connecting rope 4 and the stop block 391 are no longer limited to the transmission rod 37, so that the tension spring 38 can be reset to pull the transmission rod 37 forward, so that the block 372 of the transmission rod 37 is separated from the rail housing 31 at the through opening 33. Since the block 372 loses the limit on the inner magnetic block 32, the inner magnetic block 32 can move downward. At this time, the inner magnetic block 32 and the outer magnetic block 15 are positioned at The sealing plate 14 in the slide groove 114 can be displaced downward by the weight of the plate body and the counterweight convex strip and the gravity factor, inserted into the inner side of the slot 112 and assembled with the card frame 13, and the assembled card frame 13 and the sealing plate 14 can seal the heat dissipation grille openings 113 on both sides of the cabinet 1. At this time, the cabinet 1 will be in a sealed state. If the electrical equipment in the cabinet 1 burns due to an arc short circuit, the limited oxygen in the cabinet 1 will be difficult to support its long-term combustion and expansion of the combustion. The flame will go out as the oxygen is exhausted, reducing the flame caused by the short circuit to the electrical equipment. On the other hand, if the temperature sensor 6, the control box 5 or the electric push rod 394 fails due to a fault, the arc of the arc short circuit or the arc burning can also directly disconnect the connecting rope 4, so that the transmission rod 37 moves forward, and the inner magnetic block 32, the outer magnetic block 15 and the sealing baffle 14 move down to seal the heat dissipation grille 113 of the cabinet 1, so that the cabinet 1 is in a sealed state, so that the short-circuit protection high and low voltage distribution cabinet can automatically seal the cabinet 1 when an arc short circuit occurs, to prevent the entry of external oxygen, so that the flame caused by the arc short circuit is quickly extinguished as the oxygen is exhausted;The operation when the flame is not effectively controlled is as follows: the bearing part 8 is installed on the inner side of the upper storage part 12, so that the grid plate 82 and the pad paper 83 of the bearing part 8 can carry the dry powder in the dry powder storage chamber 122. When an arc short circuit occurs in the electrical equipment in the cabinet 1, and the transmission rod 37 is affected and moves forward, causing the inner magnetic block 32 to lose its limit, the retaining frame part 7 will drive the inner magnetic block 32 to move downward due to the influence of gravity, causing the shielding plate 73 of the retaining frame part 7 to separate from the opening 124. Due to the setting of the support bar 74 and the counterweight rod 75, the weight of the shielding plate 73 is unbalanced, so that the shielding plate 73 separated from the opening 124 will tilt toward the depth of the cabinet 1, that is, the installation place of the electrical equipment, and at the same time, the opening 124 will be opened to expose the pad paper 83 of the bearing part 8. When the combustion caused by the arc short circuit in the electrical equipment in the cabinet 1 becomes larger and larger and is not effectively controlled, the flame will ignite the pad paper 83 on the upper side of the opening 124, causing the dry powder carried on the upper side of the pad paper 83 to pass through. The opening 124 is guided by the shielding plate 73 and poured toward the burning electrical equipment. The large amount of dry powder poured can extinguish or effectively control the flame. When the arc short circuit causes an explosion, the door panel 23 will be directly impacted and deformed. The deformation of the door panel 23 will drive the upper rail plate 28 to move outward. The outward movement of the rail plate 28 will expose the rail mouth 123 and the padding paper 83 on the upper side of the rail mouth 123. At this time, the flame associated with the explosion will ignite the padding paper 83, so that the dry powder can be discharged through the rail mouth 123 to control or extinguish the flame. If the door panel 23 and the rail plate 28 are removed during maintenance, the rail mouth 123 will be directly exposed. If a short circuit occurs and causes instantaneous large-scale combustion, the flame will directly ignite the padding paper 83, causing the dry powder to pour downward to control the flame, so that the short-circuit protection type high and low voltage distribution cabinet can quickly extinguish or effectively control large-scale flames when the combustion caused by the arc short circuit is not effectively controlled. ;

[0018] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the method and its core ideas of this application. The above are only preferred implementation methods of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the application to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A short-circuit protection type high and low voltage distribution cabinet, comprising a transmission module (3), a control box (5), a temperature sensor (6), a retaining frame (7), a bearing portion (8) and a cabinet body (1), characterized in that: A cabinet door portion (2) is installed on the front side of the cabinet body (1), the cabinet body (1) comprises a main box portion (11), an upper storage portion (12) is installed on the upper side of the main box portion (11), the main box portion (11) comprises a box body (111), slots (112) are provided on both left and right sides of the box body (111), a group of the slots (112) are provided with heat dissipation grilles (113) on opposite sides, and slide grooves (113) are provided on the upper sides of the slots (112). 14), a through rail (115) is connected between the slide groove (114) and the slot (112), the inner side of the through rail (115) is slidably connected to a card frame (13) located on the inner side of the slide groove (114) and the slot (112), the inner side of the through rail (115) is slidably connected to a sealing plate (14) matched with the card frame (13), a group of countersunk holes on the opposite sides of the sealing plate (14) are fixedly connected to an external magnetic block (15), the cabinet door The cabinet body (2) comprises a seat shell (21) fixed to the lower side of the cabinet body (1), a guide insert bottom plate (22) being slidably connected to the inner side of the seat shell (21), a door plate (23) abutting against the front end surface of the cabinet body (1) being fixedly connected to the upper front end of the guide insert bottom plate (22), a front cover plate (24) located on the inner side of the cabinet body (1) being fixedly connected to the rear end surface of the door plate (23), and a front cover plate (24) inserted into the slot (1) being fixedly connected to both sides of the rear end surface of the door plate (23). 12), a plug plate (25) is provided on the inner side of the plug plate (25), a slot (26) is provided on one side of the plug plate (25) close to the heat dissipation grille (113), transmission modules (3) are installed on the left and right inner walls of the box body (111), a connecting rope (4) is installed between a group of the transmission modules (3), a control box (5) is installed on the left inner wall of the box body (111), and temperature sensors (6) are installed on the upper and lower sides of the left and right inner walls of the box body (111).

2. A short-circuit protection high and low voltage distribution cabinet according to claim 1, characterized in that: The transmission module (3) comprises a rail shell (31) fixedly connected to the inner wall of the box body (111); an inner magnetic block (32) which is laterally aligned with the outer magnetic block (15) is slidably connected to the inner side of the rail shell (31); a through opening (33) is provided in the front side plate of the rail shell (31); a seat bar (34) located below the through opening (33) is fixedly connected to the front side of the rail shell (31); a group of two separately arranged guide rings (35) are fixedly connected to the upper end surface of the seat bar (34); a protrusion (36) is fixedly connected to the front end of the seat bar (34); a transmission rod (37) is installed on the inner side of a group of the guide rings (35); the transmission rod (37) comprises a rod body (371) slidably connected to the ring hole of the guide ring (35); a blocking block (372) which passes through the through opening (33) and is located below the inner magnetic block (32) is fixedly connected to the rear end of the rod body (371); The front end of the seat bar (34) is fixedly connected to a connecting block (373), the side plane end of the connecting block (373) is fixedly connected to a rope ring (374), a tension spring (38) is fixedly connected between the front end surface of the connecting block (373) and the rear end surface of the protrusion (36), a side of the seat bar (34) away from the inner wall of the box body (111) is fixedly connected to a blocking portion (39), the blocking portion (39) comprises a stop block (391), a square opening (392) is provided on the inner side of the stop block (391), a fixing frame (393) is fixedly connected to the front side of the stop block (391), an electric push rod (394) is fixedly connected to the inner side of the hole of the fixing frame (393), a driving rod of the electric push rod (394) is fixedly connected to a cutter (395) located on the inner side of the square opening (392), and a connecting rope (4) located on the rear side of the stop block (391) is installed between a group of the rope rings (374).

3. A short-circuit protection high and low voltage distribution cabinet according to claim 2, characterized in that: The card frames (13) are inserted into the inner side of the card slots (26); the card frames (13) are composed of a seat plate with a slot and card strips on both sides; the sealing plate (14) is composed of a counterweight convex strip and a plate body; the counterweight convex strip of the sealing plate (14) is arranged in the seat plate slot of the card frame (13); and the plate body of the sealing plate (14) is arranged between a group of card strips of the card frame (13).

4. A short-circuit protection high and low voltage distribution cabinet according to claim 2, characterized in that: The width dimension of the heat dissipation grille (113) is smaller than the width dimension of the through rail (115); the width dimension of the card frame (13) and the sealing plate (14) after being assembled is larger than the width dimension of the heat dissipation grille (113); a spacing is provided between the protrusion (36) and the connecting block (373); the temperature sensor (6) and the control box (5) are electrically connected; and the control box (5) and the electric push rod (394) are electrically connected.

5. A short-circuit protection high and low voltage distribution cabinet according to claim 2, characterized in that: A filter screen (27) is fixedly connected to the inner side of the circular opening of the plug plate (25); the filter screen (27) is arranged on the left and right sides of a group of heat dissipation grille openings (113); the filter screen (27) and the heat dissipation grille openings (113) are arranged to be horizontally aligned; and scrapers (16) are fixedly connected to the left and right sides of the cabinet (1); the facing surfaces of a group of scrapers (16) are in contact with the outer end surface of the plug plate (25).

6. A short-circuit protection high and low voltage distribution cabinet according to claim 2, characterized in that: The upper storage portion (12) comprises a storage shell (121) fixedly connected to the box body (111); a dry powder storage chamber (122) is provided on the inner side of the storage shell (121); a paper replacement port (125) is provided on the left side of the dry powder storage chamber (122); a rail port (123) is provided on the lower front portion of the dry powder storage chamber (122); an opening (124) is provided on the lower middle portion of the dry powder storage chamber (122); a normally closed feeding head (126) is fixedly connected to the left hole of the storage shell (121); the retaining frame portion (7) comprises a group of two folding rods (71) fixedly connected to the inner magnetic block (32); the upper ends of the folding rods (71) are rotatably connected to rotating parts (72); the upper sides of the rotating parts (72) are fixedly connected to the opening (12 4), the baffle plate (73) is fixedly connected to the lower side of the baffle plate (73) with a push bar (74) located on the rear side of the folding rod (71), the counterweight rod (75) is fixedly connected to the inner side of the groove of the push bar (74), a bearing portion (8) is installed on the inner side of the upper storage portion (12), the bearing portion (8) includes a push-pull plate (81) located on the inner side of the paper changing port (125), a grid plate (82) located on the inner side of the dry powder storage chamber (122) is fixedly connected to the lower right side of the push-pull plate (81), a pad paper (83) is arranged on the upper side of the grid plate (82), a push-pull block (84) is fixedly connected to the left side of the push-pull plate (81), and a rail plate (28) slidably connected to the rail port (123) is fixedly connected to the rear side of the door panel (23).

7. A short-circuit protection high and low voltage distribution cabinet according to claim 6, characterized in that: The lower end surface of the track plate (28) is in contact with the upper end surface of the front sealing plate (24); the outer end surface of the track plate (28) is in contact with the inner wall of the track opening (123); the front and rear lower end surfaces of the front sealing plate (24) are in contact with the inner wall of the box body (111); the outer end surface of the shielding plate (73) is in contact with the inner wall of the opening (124); the shielding plate (73) and the track plate (28) are both arranged on the lower side of the pad paper (83); and the normally closed feeding head (126) is composed of a tube body and a tube cover spirally connected to the tube body.

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