Arc fault isolation structure and distribution box and method capable of realizing fault voltage relief

Abstract

The invention discloses an arc fault isolation structure and a distribution box and method capable of realizing fault pressure relief, and relates to the technical field of distribution boxes. The power distribution box comprises a power distribution box body, heat dissipation openings are formed in the two ends of the power distribution box body, heat dissipation grids used for ventilation are fixed in the two heat dissipation openings, and an arc fault detector used for detecting arc faults is arranged in the power distribution box body; the inner walls of the two sides in the power distribution box body are fixedly welded with concentric-square-shaped limiting frames, sealing baffles are arranged in the two concentric-square-shaped limiting frames in a sliding mode, the two sealing baffles are used for sealing the two heat dissipation openings to isolate the power distribution box body, a fixing plate is fixed in the power distribution box body, and a set of positioning assemblies are arranged in the fixing plate. The positioning assembly limits the two sealing baffles to guarantee communication of the two heat dissipation openings. According to the invention, rapid sealing isolation of the distribution box is realized, and diffusion and harm of arc faults are effectively prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of distribution boxes, and in particular relates to an arc fault isolation structure and a distribution box capable of fault pressure relief and a method thereof. Background Art

[0002] Distribution boxes are key equipment in power systems used to distribute, control and protect electrical energy. They are widely used in residential, commercial, industrial and public facilities.

[0003] In areas with high electricity consumption, such as factories, a single distribution box cannot meet the usage needs. Generally, multiple distribution boxes are set up in the same area to facilitate centralized control of electrical equipment. However, arcing is prone to occur in the distribution box during use. In the existing technology, an arc fault detector is generally set up in the distribution box to detect the occurrence of arcing and cut off the power supply in time when the arc occurs. However, arc faults can easily cause fires in the distribution box. The arc fault detector cannot prevent the fire in the distribution box from spreading outward, which can easily cause a larger fire. Summary of the Invention

[0004] The purpose of the present invention is to provide an arc fault isolation structure and a distribution box with fault pressure relief, a method and a method of use. This technical solution realizes the technical effect of rapid sealing and isolation of the distribution box, effectively preventing the spread and harm of arc faults, and solving existing technical problems.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: An arc fault isolation structure is used to seal and isolate a distribution box when an arc fault occurs in the distribution box, comprising: A distribution box body, wherein heat dissipation openings are provided at both ends of the distribution box body, heat dissipation grilles for ventilation are fixed in the two heat dissipation openings, and an arc fault detector for detecting arc faults is provided in the distribution box body; A circular limit frame is welded and fixed to the inner walls on both sides of the distribution box body, and a sealing baffle is slid inside the two circular limit frames. The two sealing baffles are respectively used to seal the two heat dissipation ports to isolate the distribution box body. A fixing plate is fixed inside the distribution box body, and a group of positioning components is provided in the fixing plate. The positioning components limit the two sealing baffles to ensure the connectivity of the two heat dissipation ports; And an extrusion component used in conjunction with the arc fault detector, the extrusion component is used to release the positioning of the two sealing baffles. In order to facilitate the two sealing baffles to quickly seal the two heat dissipation ports after the positioning is released, a set of acceleration components is provided in the two return-shaped limit frames, and the acceleration components are used to quickly push the two sealing baffles to seal the two heat dissipation ports.

[0006] Optionally, the positioning assembly includes two first grooves provided in the fixing plate, a card plate is slid in each of the two first grooves, two connecting rods are fixed to the top ends of the two sealing baffles, the four connecting rods are respectively movable upward to pass through the top ends of the two return-shaped limit frames, two limit blocks are fixed to the side ends of the four connecting rods, a card slot is provided in each of the two limit blocks, the two card plates are respectively engaged with the two card slots, a second spring is fixed to the close ends of the two card plates, and the two second springs are respectively fixed in the two first grooves; Among them, the elasticity of the two second springs pushes the two clamping plates to move in directions away from each other. When the two clamping plates move in directions away from each other, they are respectively engaged in the two clamping grooves, so that the two limit blocks are fixed, and the two sealing baffles are stably fixed at the upper positions of the two return-shaped limit frames.

[0007] Optionally, the extrusion assembly includes a second groove provided in the fixed plate, a connecting plate sliding in the second groove, two extrusion blocks fixed to the bottom end of the connecting plate, an extrusion groove provided in each of the two clamping plates, the two extrusion blocks respectively move downward and penetrate into the two extrusion grooves, the two extrusion blocks respectively make extrusion contact with the inclined surfaces of the two extrusion grooves, a receiving groove connected to the second groove provided in the fixed plate, an electromagnet electrically connected to the arc fault detector fixed in the receiving groove, and an iron sheet magnetically connected to the electromagnet fixed in the connecting plate; Among them, when the arc fault detector detects an arc fault, the electromagnet is started, and the electromagnet drives the iron sheet to move downward. The iron sheet squeezes the inclined surfaces of the two extrusion grooves, causing the two card plates to move towards each other, thereby causing the two card plates to leave the two card slots respectively, the limit blocks lose their positioning, and the sealing baffle falls to seal the heat dissipation port.

[0008] Optionally, each group of the acceleration components includes two sealing springs, the two sealing springs are fixed between the sealing baffle and the return-shaped limit frame, and the two sealing springs are respectively sleeved on the surfaces of the two connecting rods; The elasticity of the sealing spring can quickly push the sealing baffle downward to seal after the sealing baffle loses its extrusion.

[0009] Optionally, both return-shaped limit frames are formed with sliding grooves, and the two sealing baffles slide in the two sliding grooves respectively.

[0010] A distribution box capable of fault relief includes an arc fault isolation structure and further includes: A slide is fixed in the distribution box body, and a connecting pipe is slidingly provided in the slide. A threaded fixing ring is fixed to the side end of the connecting plate. The connecting pipe is fixed in the threaded fixing ring through a connecting assembly. Two air inlets for air intake and two first exhaust ports for exhaust are provided in the connecting pipe. Two second exhaust ports matching the two first exhaust ports are provided in the slide. A one-way valve is fixed in the connecting pipe. When the connecting plate drives the connecting pipe to descend, the two first exhaust ports are connected with the two second exhaust ports. At the same time, the air inlet moves into the distribution box body, which is convenient for discharging the high-pressure air in the distribution box body.

[0011] Optionally, the connecting assembly includes an external thread opened on the surface of the connecting pipe, the connecting pipe is threadedly connected to a threaded fixing ring, and a limiting ring is fixed at the bottom end of the connecting pipe, and the limiting ring is used for extrusion contact with the threaded fixing ring.

[0012] A method for using a distribution box capable of fault pressure relief comprises the following steps: S1. When the arc fault detector detects an arc fault, the electromagnet is activated, and the electromagnet activates the extrusion assembly to release the limit of the limit block. The limit block loses its position, and the sealing baffle falls to seal the heat dissipation port; S2. After the sealing baffle loses its squeeze, the elasticity of the sealing spring can quickly push the sealing baffle downward to seal; S3. When the extrusion assembly is started, the connecting pipe is driven down to connect the two first exhaust ports with the two second exhaust ports. At the same time, the air inlet moves into the distribution box body, so as to facilitate the discharge of high-pressure air generated by combustion in the distribution box body.

[0013] The two second springs elastically push the two clamping plates to move in a direction away from each other. When the two clamping plates move in a direction away from each other, they are respectively engaged in the two clamping grooves, so that the two limit blocks are fixed, and the two sealing baffles are stably fixed in the upper positions of the two return-shaped limit frames. When the arc fault detector detects an arc fault, the electromagnet is activated, and the electromagnet drives the iron sheet to move downward. The iron sheet squeezes the inclined surfaces of the two extrusion grooves, causing the two clamping plates to move towards each other, thereby causing the two clamping plates to leave the two clamping grooves respectively, the limit blocks lose their positioning, and the sealing baffle falls to seal the heat dissipation port. After the sealing baffle loses its extrusion, the elasticity of the sealing spring can quickly push the sealing baffle downward to seal.

[0014] When the connecting plate drives the connecting pipe to descend, the two first exhaust ports are connected to the two second exhaust ports, and at the same time the air inlet moves into the distribution box body, making it convenient to discharge the high-pressure air in the distribution box body.

[0015] The embodiments of the present invention have the following beneficial effects: In this technical solution, by providing an arc fault detector, a positioning assembly, an extrusion assembly and a sealing baffle, when the arc fault detector detects an arc fault, the electromagnet is activated, and the electromagnet drives the iron sheet to move downward, and the iron sheet squeezes the inclined surfaces of the two extrusion grooves, so that the two clamping plates move in a direction close to each other, thereby causing the two clamping plates to leave the two clamping grooves respectively, and the limit blocks lose their positioning. The sealing baffle falls rapidly under the elastic action of the sealing spring to seal the heat dissipation port, thereby achieving rapid sealing and isolation of the distribution box, effectively preventing the spread and harm of the arc fault; By setting a connecting pipe, an air inlet, a first exhaust port and a second exhaust port, when the extrusion assembly is started, the connecting pipe is driven down, so that the two first exhaust ports and the two second exhaust ports are connected, and at the same time the air inlet is moved into the distribution box body, so that the high-pressure air generated by combustion in the distribution box body can be discharged conveniently, avoiding dangerous situations such as explosion due to excessive pressure in the distribution box body, and improving the safety of the distribution box.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a main perspective view of the present invention; Figure 2 It is a first partial stereoscopic view of the present invention; Figure 3 is a first partial cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 A partial enlarged view of point A in the middle; Figure 5 is a second partial cross-sectional view of the present invention; Figure 6 is a third partial cross-sectional view of the present invention; Figure 7 It is a second partial stereoscopic view of the present invention; Figure 8 For the present invention Figure 7 A partial enlarged view of point B in the middle.

[0019] In the figure: 1. Distribution box; 2. Heat dissipation grille; 3. Reciprocating limit frame; 4. Sealing baffle; 5. Connecting rod; 6. Sealing spring; 7. Press alarm; 8. Limit block; 9. Card slot; 10. Card plate; 11. Extrusion groove; 12. First groove; 13. Second spring; 14. Second groove; 15. Connecting plate; 16. Extrusion block; 17. Iron sheet; 18. Electromagnet; 19. Accommodation groove; 20. Threaded fixing ring; 21. Limiting ring; 22. Connecting pipe; 23. Slide; 24. One-way valve; 25. Air inlet; 26. First exhaust port; 27. Second exhaust port; 28. Fixing plate. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0022] Example 1 See also Figures 1-8 As shown, in this embodiment, an arc fault isolation structure is provided, which is used to seal and isolate the distribution box when an arc fault occurs in the distribution box, including a distribution box body 1, a circular limit frame 3, a sealing baffle 4, a fixing plate 28, a positioning assembly, an extrusion assembly and an acceleration assembly; Both ends of the distribution box body 1 are provided with heat dissipation openings, and heat dissipation grilles 2 for ventilation are fixed in the two heat dissipation openings. An arc fault detector for detecting arc faults is provided in the distribution box body 1; The inner walls on both sides of the distribution box body 1 are welded and fixed with a circular limit frame 3, and the two circular limit frames 3 are slid with a sealing baffle 4. The two sealing baffles 4 are used to seal the two heat dissipation ports to isolate the distribution box body 1; A fixing plate 28 is fixed in the distribution box 1, and a set of positioning components is provided in the fixing plate 28. The positioning components limit the two sealing baffles 4 to ensure the connection of the two heat dissipation ports; The positioning assembly includes two first grooves 12 provided in the fixed plate 28, a card plate 10 is slid in each of the two first grooves 12, two connecting rods 5 are fixed to the top of the two sealing baffles 4, the four connecting rods 5 are respectively movable upward to pass through the top of the two return-shaped limit frames 3, two limit blocks 8 are fixed to the side ends of the four connecting rods 5, a card slot 9 is provided in each of the two limit blocks 8, the two card plates 10 are respectively engaged with the two card slots 9, and the adjacent ends of the two card plates 10 are fixed with a second spring 13, and the two second springs 13 are respectively fixed in the two first grooves 12; The two second springs 13 elastically push the two clamping plates 10 to move away from each other. When the two clamping plates 10 move away from each other, they are respectively engaged in the two clamping grooves 9, so that the two limit blocks 8 are fixed, so that the two sealing baffles 4 are stably fixed to the upper side positions of the two return-shaped limit frames 3. The device also includes a pressing assembly used in conjunction with the arc fault detector, and the pressing assembly is used to release the positioning of the two sealing baffles 4.

[0023] The extrusion assembly includes a second groove 14 provided in the fixed plate 28, a connecting plate 15 slides in the second groove 14, two extrusion blocks 16 are fixed to the bottom end of the connecting plate 15, and extrusion grooves 11 are provided in the two card plates 10. The two extrusion blocks 16 move downward and penetrate into the two extrusion grooves 11 respectively. The two extrusion blocks 16 are respectively in contact with the inclined surfaces of the two extrusion grooves 11. A receiving groove 19 connected to the second groove 14 is provided in the fixed plate 28, an electromagnet 18 electrically connected to the arc fault detector is fixed in the receiving groove 19, and an iron sheet 17 magnetically connected to the electromagnet 18 is fixed in the connecting plate 15.

[0024] When the arc fault detector detects an arc fault, the electromagnet 18 is activated, and the electromagnet 18 drives the iron sheet 17 to move downward. The iron sheet 17 squeezes the inclined surfaces of the two extrusion grooves 11, so that the two card plates 10 move toward each other, thereby causing the two card plates 10 to leave the two card slots 9 respectively, the limit block 8 loses its position, and the sealing baffle 4 falls to seal the heat dissipation port.

[0025] In order to facilitate the two sealing baffles 4 to quickly seal the two heat dissipation ports after being released from positioning, a set of acceleration components is provided in each of the two return-shaped limit frames 3, and the acceleration components are used to quickly push the two sealing baffles 4 to seal the two heat dissipation ports.

[0026] Each acceleration assembly includes two sealing springs 6 , which are fixed between the sealing baffle 4 and the return-shaped limit frame 3 , and are respectively sleeved on the surfaces of the two connecting rods 5 .

[0027] After the sealing baffle 4 loses its squeeze, the elasticity of the sealing spring 6 can quickly push the sealing baffle 4 downward to seal; A press alarm 7 is fixed in one of the return-shaped limit frames 3. The press alarm 7 is squeezed and contacted with the bottom end of the sealing baffle 4. The sealing baffle 4 falls and presses the press alarm 7, which starts to alarm.

[0028] Example 2 Improvements based on Example 1: Refer to the attached Figure 1 -Attached Figure 8 , a distribution box with fault pressure relief, includes the above-mentioned arc fault isolation structure, and also includes a slide 23 fixed in the distribution box body 1, a connecting pipe 22 is slidably provided in the slide 23, a threaded fixing ring 20 is fixed at the side end of the connecting plate 15, and the connecting pipe 22 is fixed in the threaded fixing ring 20 through a connecting assembly, two air inlets 25 for air intake and two first exhaust ports 26 for exhaust are provided in the connecting pipe 22, two second exhaust ports 27 matching the two first exhaust ports 26 are provided in the slide 23, a one-way valve 24 is fixed in the connecting pipe 22, and when the connecting plate 15 drives the connecting pipe 22 to descend, the two first exhaust ports 26 are connected with the two second exhaust ports 27, and at the same time the air inlet 25 moves into the distribution box body 1, so as to facilitate the discharge of high-pressure air in the distribution box body 1.

[0029] The connecting assembly includes an external thread opened on the surface of the connecting pipe 22. The connecting pipe 22 is threadedly connected to the threaded fixing ring 20. A limiting ring 21 is fixed to the bottom end of the connecting pipe 22. The limiting ring 21 is used for extrusion contact with the threaded fixing ring 20.

[0030] Directions: When the arc fault detector detects an arc fault, the electromagnet 18 is activated, and the electromagnet 18 activates the extrusion assembly to release the limit on the limit block 8. The limit block 8 loses its position, and the sealing baffle 4 falls to seal the heat dissipation port.

[0031] The sealing baffle 4 falls and presses the pressing alarm 7, which starts to alarm.

[0032] When the extrusion assembly is started, the connecting pipe 22 is driven down to connect the two first exhaust ports 26 and the two second exhaust ports 27. At the same time, the air inlet 25 moves into the distribution box 1, so as to facilitate the discharge of high-pressure air generated by combustion in the distribution box 1.

[0033] It should be noted that, in the description of this specification, descriptions such as "first", "second", etc. are only used to distinguish various features and have no actual order or directional meaning, and this application is not limited to this.

[0034] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An arc fault isolation structure, which is used to seal and isolate a distribution box when an arc fault occurs in the distribution box, characterized in that: include: A distribution box (1), wherein both ends of the distribution box (1) are provided with heat dissipation openings, heat dissipation grilles (2) for ventilation are fixed in the two heat dissipation openings, and an arc fault detector for detecting arc faults is provided in the distribution box (1); The inner walls on both sides of the distribution box (1) are welded and fixed with circular limit frames (3), and sealing baffles (4) are slid in the two circular limit frames (3). The two sealing baffles (4) are respectively used to seal the two heat dissipation ports to isolate the distribution box (1). A fixing plate (28) is fixed in the distribution box (1), and a group of positioning components are provided in the fixing plate (28). The positioning components limit the two sealing baffles (4) to ensure the connection of the two heat dissipation ports. And an extrusion assembly used in conjunction with the arc fault detector, the extrusion assembly is used to release the positioning of the two sealing baffles (4), and in order to facilitate the two sealing baffles (4) to quickly seal the two heat dissipation openings after the positioning is released, a set of acceleration assemblies is provided in each of the two return-shaped limit frames (3), and the acceleration assembly is used to quickly push the two sealing baffles (4) to seal the two heat dissipation openings.

2. The arc fault isolation structure according to claim 1, wherein: The positioning assembly includes two first grooves (12) provided in the fixed plate (28), a card plate (10) is slid in each of the two first grooves (12), two connecting rods (5) are fixed to the top of each of the two sealing baffles (4), the four connecting rods (5) are respectively movable upward to pass through the top of the two return-shaped limit frames (3), two limit blocks (8) are fixed to the side ends of the four connecting rods (5), a card slot (9) is provided in each of the two limit blocks (8), the two card plates (10) are respectively engaged with the two card slots (9), the adjacent ends of the two card plates (10) are fixed with a second spring (13), and the two second springs (13) are respectively fixed in the two first grooves (12); The two second springs (13) are used to elastically push the two clamping plates (10) to move in directions away from each other. When the two clamping plates (10) move in directions away from each other, they are respectively engaged in the two clamping slots (9), so that the two limit blocks (8) are fixed, and the two sealing baffles (4) are stably fixed at the upper positions of the two return-shaped limit frames (3).

3. The arc fault isolation structure according to claim 2, wherein: The extrusion assembly includes a second groove (14) provided in the fixed plate (28), a connecting plate (15) sliding in the second groove (14), two extrusion blocks (16) fixed at the bottom end of the connecting plate (15), an extrusion groove (11) provided in each of the two clamping plates (10), the two extrusion blocks (16) respectively move downward and penetrate into the two extrusion grooves (11), and the two extrusion blocks (16) respectively contact the inclined surfaces of the two extrusion grooves (11), a receiving groove (19) connected to the second groove (14) provided in the fixed plate (28), an electromagnet (18) electrically connected to the arc fault detector fixed in the receiving groove (19), and an iron sheet (17) magnetically connected to the electromagnet (18) fixed in the connecting plate (15); When the arc fault detector detects an arc fault, the electromagnet (18) is activated, the electromagnet (18) drives the iron sheet (17) to move downward, and the iron sheet (17) squeezes the inclined surfaces of the two squeezing grooves (11), so that the two card plates (10) move toward each other, thereby causing the two card plates (10) to leave the two card grooves (9) respectively, the limit block (8) loses its position, and the sealing baffle (4) falls to seal the heat dissipation port.

4. An arc fault isolation structure according to claim 3, characterized in that: Each group of the acceleration components includes two sealing springs (6), the two sealing springs (6) are fixed between the sealing baffle (4) and the return limit frame (3), and the two sealing springs (6) are respectively sleeved on the surfaces of the two connecting rods (5); The elasticity of the sealing spring (6) can quickly push the sealing baffle (4) downward to seal after the sealing baffle (4) loses its extrusion.

5. An arc fault isolation structure according to claim 4, characterized in that: The two return-shaped limit frames (3) are both formed with sliding grooves, and the two sealing baffles (4) slide in the two sliding grooves respectively.

6. A distribution box with fault relief function, characterized in that: The arc fault isolation structure according to claim 5 further comprises: A slide (23) is fixed in the distribution box (1), and a connecting pipe (22) is slidingly provided in the slide (23). A threaded fixing ring (20) is fixed on the side end of the connecting plate (15). The connecting pipe (22) is fixed in the threaded fixing ring (20) through a connecting assembly. Two air inlets (25) for air intake and two first exhaust ports (26) for exhaust are provided in the connecting pipe (22). Two second exhaust ports (27) matching the two first exhaust ports (26) are provided in the slide (23). A one-way valve (24) is fixed in the connecting pipe (22). When the connecting plate (15) drives the connecting pipe (22) to descend, the two first exhaust ports (26) and the two second exhaust ports (27) are connected. At the same time, the air inlet (25) moves into the distribution box (1), so as to facilitate the discharge of high-pressure air in the distribution box (1).

7. The distribution box with fault-relief capability as claimed in claim 6, characterized in that: The connection assembly comprises an external thread formed on the surface of a connection pipe (22), the connection pipe (22) being threadedly connected to a threaded fixing ring (20), a limiting ring (21) being fixed at the bottom end of the connection pipe (22), and the limiting ring (21) being used for extrusion contact with the threaded fixing ring (20).

8. A method for using a distribution box capable of fault pressure relief, applied to the distribution box capable of fault pressure relief according to claim 7, characterized in that: The steps include: S1. When the arc fault detector detects an arc fault, the electromagnet (18) is activated, and the electromagnet (18) activates the extrusion assembly to release the limit of the limit block (8), the limit block (8) loses its position, and the sealing baffle (4) falls to seal the heat dissipation port; S2, through the elasticity of the sealing spring (6), after the sealing baffle (4) loses its extrusion, the sealing baffle (4) can be quickly pushed downward to seal; S3. When the extrusion assembly is started, the connecting pipe (22) is driven downward, so that the two first exhaust ports (26) and the two second exhaust ports (27) are connected, and at the same time, the air inlet (25) moves into the distribution box (1), so as to facilitate the discharge of high-pressure air generated by combustion in the distribution box (1).

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