Electric arc prevention power distribution switch

Abstract

The utility model discloses an arc-proof power distribution switch, which comprises a shell, two sides of the inner side surface of the shell are provided with clamping grooves, arc-extinguishing grid sheets are clamped in the clamping grooves, the middle parts of the outer surfaces of the arc-extinguishing grid sheets are provided with gaps, and the middle part of the inner bottom wall of the shell is fixedly connected with a static contact. According to the electric arc prevention power distribution switch, through the arrangement of the arc extinguishing grid sheet, the moving contact, the insulation column, the flow guide plate and the exhaust hole, when a line fails, the generated electric arc enables the moving contact to rotate by a certain angle, the electric arc is uniformly divided into multiple sections of broken arcs under the action of the arc extinguishing grid sheet, and when alternating current crosses zero, all short arcs are extinguished, so that the safety of the power distribution switch is ensured. Heat emitted by the arc extinguishing grid sheets and high-pressure gas generated during arc extinguishing can be discharged to the left side of the power distribution switch, a part of air pressure is buffered and reduced by the plurality of insulating columns, and the reduced gas is guided by the guide plate and is discharged to the outside through the plurality of exhaust holes in the top, so that the high efficiency of power extinguishing in the power distribution switch is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution switches, in particular to an arc-proof power distribution switch. Background Art

[0002] When the switch is disconnected, an arc will be generated between the silver points or contacts. The most obvious appearance characteristics of arc discharge are bright arc columns and electrode spots. The arc is a beam of high-temperature ionized gas. Under the action of external forces, such as airflow, external magnetic field and even the magnetic field generated by the arc itself, it will move rapidly, stretch, and curl to form a very complex shape. Existing distribution switches will generate high-temperature and high-voltage arcs when in use, which will cause serious or even fatal burns to the human body.

[0003] After searching, Chinese patent publication (announcement) number CN220914071U discloses an arc-proof distribution switch, including a shell, a support plate fixedly connected to the outer wall of the shell, a switch box fixedly connected to the outer wall of the support plate, a second wire arranged on the inner wall of the switch box, a first wire arranged on the inner wall of the shell, and a telescopic device arranged on the outer wall of the first wire. By pulling out the pull rod, the top seat of the arc-proof distribution switch will no longer be fixed, and the support spring will no longer be stretched. At this time, the stretching force will be released and rebound immediately, and the support column supported by the top seat will also be released by the second small spring inside, and the top seat will be directly bounced off, so that the top seat can quickly drive the plug head and the power column away from the switch box, and quickly perform the power-off operation, so as to prevent the equipment from being separated in time after the arc is generated, resulting in the arc causing damage to the equipment.

[0004] Although the distribution switch of the above patent can quickly cut off power, it cannot perform arc extinguishing operation well. If the arc extinguishing time is long, it will cause damage to the moving and static contacts of the distribution switch. At the same time, the fault current will also damage the line and the electrical equipment in the line, which is easy to cause safety accidents and cause great losses to users. Therefore, it is necessary to design an arc-proof distribution switch to solve the above problems. Utility Model Content

[0005] The main purpose of the utility model is to provide an arc-proof distribution switch, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An arc-proof distribution switch comprises a shell, both sides of the inner side surface of the shell are provided with slots, arc-extinguishing grids are clamped inside the slots, a notch is provided in the middle of the outer surface of the arc-extinguishing grid, a static contact is fixedly connected to the middle of the inner bottom wall of the shell; a moving contact is rotatably connected to the middle of the inner side surface of the shell, a fixing seat is clamped on one side inside the shell, an insulating column is fixedly connected to one side of the inner side surface of the fixing seat, a guide plate is fixedly connected to the side of the inner side surface of the fixing seat close to the insulating column, and exhaust holes are provided on both sides of the upper surfaces of the shell and the fixing seat.

[0008] In order to achieve the effect of facilitating gas flow, as an arc-proof distribution switch of the utility model, a plurality of insulating columns are provided, and the plurality of insulating columns are staggered and fixed on the inner side surface of the fixing base.

[0009] In order to facilitate the resetting of the moving contact, as an arc-proof distribution switch of the utility model, a paddle is fixedly connected to the outer surface of the moving contact.

[0010] In order to achieve the effect of preventing accidental contact, as an arc-proof distribution switch of the utility model, the top of the outer surface of the shell is fixedly connected to a support rod, and the outer surface of the support rod is rotatably connected to a transparent cover.

[0011] In order to facilitate the installation of the fixing base, as an arc-proof distribution switch of the utility model, mounting holes are opened at the four corners of the outer surface of the fixing base, and the internal threads of the mounting holes are connected with bolts.

[0012] In order to facilitate the fixing of the shell, as an arc-proof distribution switch of the utility model, the middle parts of the upper and lower surfaces of the fixing seat are fixedly connected with spring pieces, the middle parts of the upper and lower surfaces of the shell are provided with limiting holes, and the middle parts of the top and bottom walls of the shell are provided with limiting grooves.

[0013] In order to facilitate the connection of the static contact, as an arc-proof distribution switch of the utility model, a pad is fixedly connected to the middle part of the inner bottom wall of the fixed base, a copper bus is fixedly connected to the upper surface of the pad, and a connecting piece is fixedly connected to the outer surface of the copper bus.

[0014] In order to facilitate the connection of lines, as an arc-proof distribution switch of the utility model, a winding column is fixedly connected to the upper surface of the copper busbar, and one end of the winding column is fixedly connected to a limiting plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. In the utility model, through the arrangement of arc extinguishing grids, moving contacts, insulating columns, guide plates and exhaust holes, when a line fails, the generated arc causes the moving contact to rotate a certain angle, and the arc is evenly divided into multiple broken arcs under the action of the arc extinguishing grids. When the AC current passes through zero, all short arcs will be extinguished, and at the same time, the arc extinguishing grids will dissipate heat, and the arc will cool down quickly, thereby achieving the effect of arc extinguishing. The heat dissipated by the arc extinguishing grids and the high-pressure gas generated during arc extinguishing will be discharged to the left side of the distribution switch, and multiple insulating columns will buffer and reduce a part of the air pressure to increase the ability to resist arcs and air pressure. The guide plate will guide the reduced gas and discharge it to the outside through multiple exhaust holes on the top, thereby ensuring the high efficiency of power extinguishing in the distribution switch.

[0017] 2. In the utility model, through the arrangement of the paddle, transparent cover, spring sheet, limiting hole and limiting groove, the position of the moving contact can be judged from the outside through the angular position of the paddle, and the moving contact can be reset by using the paddle. The transparent cover is convenient for the user to check the use status of the moving contact from the outside through the paddle, and accidental contact can be avoided. When the shell is installed, the spring sheet is pressed to sleeve the shell on the outer surface of the fixing seat. The spring sheet slides inside the limiting groove until the fixing seat is in full contact with the shell. Under the elastic action of the spring sheet itself, it is clamped in the limiting hole. When disassembly is required, only the spring sheet needs to be pressed to take out the shell. The operation is simple and convenient, which facilitates the rapid assembly of the distribution switch and improves the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional plan structure of an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the front view of the internal structure of the housing of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal side view of the housing of an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the internal structure of the fixing base according to an embodiment of the utility model.

[0023] In the figure: 1. shell; 2. slot; 3. arc extinguishing grid; 4. notch; 5. static contact; 6. moving contact; 7. fixing seat; 8. insulating column; 9. guide plate; 10. exhaust hole; 11. paddle; 12. support rod; 13. transparent cover; 14. mounting hole; 15. bolt; 16. spring; 17. limit hole; 18. limit groove; 19. pad; 20. copper busbar; 21. connector; 22. winding column; 23. limit plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0025] like Figure 1-5 As shown, an arc-proof distribution switch comprises a shell 1, both sides of the inner side surface of the shell 1 are provided with slots 2, arc-extinguishing grids 3 are clamped inside the slots 2, a notch 4 is provided in the middle of the outer surface of the arc-extinguishing grid 3, a static contact 5 is fixedly connected to the middle of the inner bottom wall of the shell 1; a moving contact 6 is rotatably connected to the middle of the inner side surface of the shell 1, a fixing seat 7 is clamped on one side inside the shell 1, an insulating column 8 is fixedly connected to one side of the inner side surface of the fixing seat 7, a guide plate 9 is fixedly connected to the side of the inner side surface of the fixing seat 7 close to the insulating column 8, and exhaust holes 10 are provided on both sides of the upper surfaces of the shell 1 and the fixing seat 7.

[0026] In specific use, through the arrangement of the arc extinguishing grid 3, the moving contact 6, the insulating column 8, the guide plate 9 and the exhaust hole 10, a plurality of arc extinguishing grids 3 are evenly connected to the inside of the housing 1 through the card slot 2, which is convenient for installation and disassembly, and is convenient for replacement and maintenance when damaged, saving costs. When the distribution switch is in normal use, the moving contact 6 is in contact with the static contact 5. When a line fault occurs, the generated arc causes the moving contact 6 to rotate a certain angle, and the arc is evenly divided into multiple broken arcs under the action of the arc extinguishing grid 3. When the AC current passes through zero, all short arcs will be extinguished, and the arc extinguishing grid 3 will disperse The arc will quickly cool down due to the heat generated, thereby achieving the arc extinguishing effect and improving the reliability of the distribution switch. The notch 4 reduces the resistance of the arc when entering the arc extinguishing grid 3. The heat emitted by the arc extinguishing grid 3 and the high-pressure gas generated during arc extinguishing will be discharged to the left side of the distribution switch. Multiple insulating columns 8 buffer and reduce part of the air pressure, increase the ability to resist arcs and air pressure, effectively prevent the arc from flying out, and improve the arc extinguishing effect. The guide plate 9 guides the reduced gas and discharges it to the outside through multiple exhaust holes 10 on the top, ensuring the high efficiency of power extinguishing in the distribution switch.

[0027] In this embodiment, a plurality of insulating pillars 8 are provided, and the plurality of insulating pillars 8 are staggered and fixed on the inner side surface of the fixing seat 7 .

[0028] During specific use, through the setting of the insulating columns 8, the two groups of insulating columns 8 are staggered and fixed to the inner side of the fixing seat 7, which is convenient for gas discharge and at the same time buffers and reduces part of the gas pressure, thereby increasing the ability to resist electric arc and gas pressure.

[0029] In this embodiment, a paddle 11 is fixedly connected to the outer surface of the moving contact 6 .

[0030] During specific use, by setting the paddle 11, the paddle 11 is fixed on the outer surface of the moving contact 6, and the position of the moving contact 6 can be judged from the outside through the angular position of the paddle 11. At the same time, the moving contact 6 can be reset using the paddle 11.

[0031] In this embodiment, a support rod 12 is fixedly connected to the top of the outer surface of the housing 1 , and a transparent cover 13 is rotatably connected to the outer surface of the support rod 12 .

[0032] During specific use, the transparent cover 13 can be provided to facilitate the user to check the use status of the moving contact 6 from the outside through the paddle 11. At the same time, the transparent cover 13 shields and protects the paddle 11 through the support rod 12 to avoid accidental contact and ensure safety in use.

[0033] In this embodiment, mounting holes 14 are formed at four corners of the outer surface of the fixing seat 7 , and bolts 15 are threadedly connected to the inner surfaces of the mounting holes 14 .

[0034] During specific use, through the setting of the mounting holes 14, four groups of mounting holes 14 are opened at the four corners of the outer surface of the fixing base 7, and are used in conjunction with the bolts 15 to facilitate the installation of the distribution switch and ensure the firmness of the installation.

[0035] In this embodiment, spring pieces 16 are fixedly connected to the middle of the upper and lower surfaces of the fixing seat 7, limiting holes 17 are provided in the middle of the upper and lower surfaces of the shell 1, and limiting grooves 18 are provided in the middle of the top and bottom walls of the shell 1.

[0036] During specific use, through the setting of the spring clip 16, when the shell 1 is installed, the spring clip 16 is pressed to sleeve the shell 1 on the outer surface of the fixing seat 7, and the spring clip 16 slides inside the limiting groove 18 until the fixing seat 7 is completely in contact with the shell 1. Under the elastic action of the spring clip 16 itself, it is clamped in the inside of the limiting hole 17. When disassembly is required, only the spring clip 16 needs to be pressed to take out the shell 1. The operation is simple and convenient, which facilitates the rapid assembly of the distribution switch and improves the installation efficiency.

[0037] In this embodiment, a backing plate 19 is fixedly connected to the middle of the inner bottom wall of the fixing seat 7 , a copper busbar 20 is fixedly connected to the upper surface of the backing plate 19 , and a connecting piece 21 is fixedly connected to the outer surface of the copper busbar 20 .

[0038] During specific use, through the setting of the connecting piece 21, the pad 19 is used to support the copper busbar 20. The copper busbar 20 can be energized after being fixed in the external circuit. When the fixing seat 7 and the shell 1 are installed, the connecting piece 21 is plugged into the inside of the static contact 5, so that the entire distribution switch can be used normally. After the shell 1 is separated from the fixing seat 7, the power can be automatically cut off to ensure safety during maintenance.

[0039] In this embodiment, a winding post 22 is fixedly connected to the upper surface of the copper busbar 20 , and one end of the winding post 22 is fixedly connected to a limiting plate 23 .

[0040] During specific use, through the setting of winding poles 22, three groups of winding poles 22 are fixed on the upper surface of the copper bus 20 for connecting external circuits. The limiting plates 23 are fixed on the tops of the winding poles 22 to prevent the circuits from being detached from the winding poles 22 after being wound and fixed, thereby ensuring firmness during use.

[0041] Working principle: In use, three groups of winding posts 22 are connected to the external circuit, and the limiting plate 23 prevents the circuit from being entangled and fixed and then separated from the winding post 22. The four groups of mounting holes 14 and the bolts 15 are used in conjunction with each other to install the fixing seat 7, press the spring piece 16, and sleeve the shell 1 on the outer surface of the fixing seat 7. The spring piece 16 slides inside the limiting groove 18 until the fixing seat 7 is completely in contact with the shell 1. Under the elastic action of the spring piece 16 itself, it is clamped in the inside of the limiting hole 17. The copper bus 20 is plugged into the inside of the static contact 5 through the connecting piece 21, and the moving contact 6 is in contact with the static contact 5, so that the distribution switch can be used normally. When a fault occurs in the line, the arc generated causes the moving contact 6 to rotate a certain angle, and the arc extinguishing grid 3 works. The arc is evenly divided into multiple short arcs. When the AC current passes through zero, all short arcs will be extinguished. At the same time, the arc extinguishing grid 3 will dissipate heat to achieve the effect of arc extinguishing. The heat dissipated by the arc extinguishing grid 3 and the high-pressure gas generated during arc extinguishing will be discharged to the left side of the distribution switch. Multiple insulating columns 8 will buffer and reduce part of the air pressure to increase the ability to resist arcs and air pressure. The guide plate 9 will guide the reduced gas and discharge it to the outside through multiple exhaust holes 10 on the top to ensure the high efficiency of power extinguishing in the distribution switch. The transparent cover 13 is convenient for the user to check the use status of the moving contact 6 from the outside through the paddle 11. At the same time, the transparent cover 13 shields and protects the paddle 11 through the support rod 12 to avoid accidental contact.

[0042] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An arc-proof power distribution switch, comprising a housing (1), characterized in that: The housing (1) is provided with a clamping groove (2) on both sides of the inner side surface, an arc extinguishing grid (3) is clamped inside the clamping groove (2), a notch (4) is provided in the middle of the outer surface of the arc extinguishing grid (3), and a static contact (5) is fixedly connected to the middle of the inner bottom wall of the housing (1); A moving contact (6) is rotatably connected to the middle of the inner side surface of the shell (1), a fixing seat (7) is clamped on one side of the interior of the shell (1), an insulating column (8) is fixedly connected to one side of the inner side surface of the fixing seat (7), a guide plate (9) is fixedly connected to the side of the inner side surface of the fixing seat (7) close to the insulating column (8), and exhaust holes (10) are provided on both sides of the upper surfaces of the shell (1) and the fixing seat (7).

2. The arc-proof distribution switch according to claim 1, characterized in that: A plurality of insulating columns (8) are provided, and the plurality of insulating columns (8) are staggered and fixed on the inner side surface of the fixing seat (7).

3. The arc-proof distribution switch according to claim 1, characterized in that: A paddle (11) is fixedly connected to the outer surface of the moving contact (6).

4. The arc-proof distribution switch according to claim 1, characterized in that: A support rod (12) is fixedly connected to the top of the outer surface of the shell (1), and a transparent cover (13) is rotatably connected to the outer surface of the support rod (12).

5. The arc-proof distribution switch according to claim 1, characterized in that: Mounting holes (14) are provided at four corners of the outer surface of the fixing seat (7), and bolts (15) are connected to the inner threads of the mounting holes (14).

6. The arc-proof distribution switch according to claim 1, characterized in that: The middle parts of the upper and lower surfaces of the fixing seat (7) are fixedly connected with spring pieces (16), the middle parts of the upper and lower surfaces of the shell (1) are provided with limiting holes (17), and the middle parts of the inner top wall and the inner bottom wall of the shell (1) are provided with limiting grooves (18).

7. The arc-proof distribution switch according to claim 1, characterized in that: A backing plate (19) is fixedly connected to the middle of the inner bottom wall of the fixing seat (7), a copper busbar (20) is fixedly connected to the upper surface of the backing plate (19), and a connecting piece (21) is fixedly connected to the outer surface of the copper busbar (20).

8. The arc-proof distribution switch according to claim 7, characterized in that: A winding post (22) is fixedly connected to the upper surface of the copper busbar (20), and one end of the winding post (22) is fixedly connected to a limiting plate (23).

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