Arc extinguishing cover with conveniently replaceable grid

Abstract

This utility model relates to the field of arc-extinguishing hoods and discloses an arc-extinguishing hood with convenient grid replacement. The mounting assembly includes side plates fixedly disposed on the left and right sides of a mounting plate, and a mounting strip located on the front side of the side plates. Several slots A are formed on the side wall of the side plate facing the mounting plate, penetrating the front side wall. Slots A match the insulating grid sheets, which are inserted into slots A and contact the side plates and mounting plate. The top end of the mounting strip is rotatably connected to the top end of the side plate, and the bottom end of the mounting strip is detachably connected to the bottom end of the side plate. The mounting strip is located on the front side of the insulating grid sheets and contacts them. This utility model has the beneficial effect of facilitating the replacement of insulating grid sheets, solving the problem that existing arc-extinguishing hoods typically use a hot-riveting process to connect the grid sheets, making disassembly difficult and hindering the individual replacement of the lower grid sheets.

Description

Technical Field

[0001] This utility model relates to the field of arc extinguishing cover technology, specifically to an arc extinguishing cover with easily replaceable grid plates. Background Technology

[0002] An arc-extinguishing chamber, also known as an arc-extinguishing ring or arc-suppression chamber, is a crucial safety component in switching devices (such as contactors, circuit breakers, and knife switches). Its primary function is to safely and quickly extinguish the electric arc generated when a circuit is broken, preventing the arc from becoming too long and causing overheating damage to the contacts or other safety problems. The arc-extinguishing chamber typically contains several arc-extinguishing grids, which are usually made of insulating material.

[0003] During operation, the electric arc within the arc-extinguishing chamber is elongated and segmented by magnetic lines of force. The lower grid plate, due to its more concentrated arc path, experiences greater arc energy and thermal effects, simultaneously bearing both arc thermal shock and mechanical tension, leading to accelerated material fatigue. Therefore, the lower grid plate is more prone to damage than the upper grid plate, often resulting in a situation where the lower grid plate is damaged while the upper grid plate remains relatively intact. Replacing the lower grid plate individually would significantly reduce waste. However, existing arc-extinguishing chambers typically use a hot-riveting process to connect the grid plates, making disassembly difficult. This hinders the convenient installation and removal of the grid plates, making it inconvenient to replace the lower grid plate individually. Utility Model Content

[0004] The purpose of this invention is to provide an arc-extinguishing cover that facilitates the replacement of grid plates, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an arc-extinguishing cover for easy replacement of insulating grids, comprising a mounting plate and a plurality of insulating grids located on the front side of the mounting plate. The mounting plate is provided with a mounting assembly, which includes side plates fixedly disposed on the left and right sides of the mounting plate and a mounting strip located on the front side of the side plates. A plurality of slots A are provided on the side wall facing the mounting plate, penetrating the front side wall of the side plate. The slots A are matched with the insulating grids. The insulating grids are inserted into the slots A and contact and connect with the side plates and the mounting plate. The top end of the mounting strip is rotatably connected to the top end of the side plates, and the bottom end of the mounting strip is detachably connected to the bottom end of the side plates. The mounting strip is located on the front side of the insulating grids and contact and connects with the insulating grids.

[0006] Preferably, the mounting assembly further includes a protrusion A fixedly disposed on the side of the side plate facing the mounting plate, and a fixing post fixedly disposed on the front side of the protrusion A. The protrusion A is located above the insulating grid sheet. The mounting strip has a rotating hole extending through it from front to back. The fixing post is inserted into the rotating hole and rotatably connected to the mounting strip.

[0007] Preferably, the mounting assembly further includes a protrusion B and a screw fixedly disposed on the side of the side plate facing the mounting plate. The protrusion B is located below the insulating grid sheet. The protrusion B has a screw hole extending through it from front to back. The mounting strip has a through hole extending through it from front to back. The screw is inserted into the through hole and then screwed into the screw hole to fix it to the mounting strip and the protrusion B.

[0008] Preferably, the front sidewall of the mounting plate has a plurality of slots B that communicate with slot A, and the rear end of the insulating grid sheet is inserted into slot B and abuts against the mounting plate.

[0009] Preferably, a baffle is fixedly provided on the front side of the fixing column, located on the front side of the mounting strip, and the diameter of the baffle is larger than the diameter of the rotating hole.

[0010] Preferably, a protrusion C is fixedly provided on the rear side of the insulating grid sheet, and a plurality of through slots B are provided on the rear side wall of the mounting plate, wherein the protrusion C is inserted into the through slot and extends out from the rear side of the mounting plate.

[0011] Preferably, a plurality of mounting blocks are fixedly provided on the left and right sides of the mounting plate, and the mounting blocks are provided with waist holes that run through the front and back.

[0012] The beneficial effects of this utility model are as follows: During assembly, the insulating grid sheet is inserted into slot A, and the rear end of the insulating grid sheet is inserted into slot B, so that the insulating grid sheet contacts and connects with the side plate and mounting plate. At this time, the protrusion C is inserted into the through slot and extends out to the rear side of the mounting plate. The mounting strip is rotated to the front side of the insulating grid sheet, and the screw is inserted into the through hole and screwed into the screw hole to fix it to the mounting strip and protrusion B, so that the insulating grid sheet is located in slots A and B and cannot be pulled out, thus completing the assembly of this utility model. When it is necessary to replace the insulating grid sheet, the screw is turned off to remove it, and the mounting strip is rotated to be located on the left and right sides of the insulating grid sheet, so that the insulating grid sheet can be pulled out of slots A and B and connect with the side plate and mounting plate. The separation of the mounting plate and the side plate facilitates the installation and removal of the insulating grid sheets. New insulating grid sheets are then installed with the side plate and mounting plate, making it easy to replace them. If the insulating grid sheets are installed too tightly or dust accumulates in slot A, making them difficult to remove, tapping the protrusion C from the rear of the mounting plate will release the insulating grid sheets, preventing them from getting stuck. In summary, this invention facilitates the replacement of insulating grid sheets and solves the problem that existing arc-extinguishing covers typically use a hot-riveting process to connect the grid sheets, making disassembly difficult and hindering the individual replacement of the lower grid sheets. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the structure of this utility model; Appendix Figure 2 This is a schematic diagram of the rear structure of the present invention; Appendix Figure 3This is a schematic diagram showing the installation strip of this utility model when opened; Appendix Figure 4 This is an exploded view of the present invention.

[0014] In the diagram: 1. Mounting plate; 2. Insulating grid sheet; 3. Side plate; 4. Mounting strip; 5. Slot A; 6. Protrusion A; 7. Rotary hole; 8. Protrusion B; 9. Screw; 10. Screw hole; 11. Through hole; 12. Slot B; 13. Backplate; 14. Protrusion C; 15. Through groove; 16. Mounting block; 17. Waist hole; 18. Fixing post. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] like Figure 1-4As shown, this utility model discloses an arc-extinguishing cover that facilitates the replacement of insulating grid plates, including a mounting plate 1 and a plurality of insulating grid plates 2 located on the front side of the mounting plate 1. The mounting plate 1 is provided with a mounting assembly, which includes side plates 3 fixedly disposed on the left and right sides of the mounting plate 1 and a mounting strip 4 located on the front side of the side plates 3. A plurality of slots A5 are opened on the side wall of the side plate 3 facing the mounting plate 1, which penetrate the front side wall of the side plate 3. The slots A5 are matched with the insulating grid plates 2. The insulating grid plates 2 are inserted into the slots A5 and contact and connect with the side plates 3 and the mounting plate 1. The top end of the mounting strip 4 is rotatably connected to the top end of the side plate 3, and the bottom end of the mounting strip 4 is detachably connected to the bottom end of the side plate 3. The mounting strip 4 is located on the front side of the insulating grid plates 2 and is in contact and connected with the insulating grid plates 2. During assembly, the insulating grid sheet 2 is inserted into slot A5, and the rear end of the insulating grid sheet 2 is inserted into slot B12, so that the insulating grid sheet 2 contacts and connects with the side plate 3 and the mounting plate 1. At this time, the protrusion C14 is inserted into the through groove 15 and extends out to the rear side of the mounting plate 1. The mounting strip 4 is rotated to the front side of the insulating grid sheet 2, and the screw 9 is inserted into the through hole 11 and then screwed into the screw hole 10 to fix it to the mounting strip 4 and the protrusion B8, so that the insulating grid sheet 2 is located in slot A5 and slot B12 and cannot be pulled out, thus completing the assembly of the present invention. When it is necessary to replace the insulating grid sheet 2, the screw 9 is turned off, and the mounting strip 4 is rotated to be located on the left and right sides of the insulating grid sheet 2, so that the insulating grid sheet 2 can be pulled out of slot A5 and slot B12 and the side plate. The separation of the side plate 3 from the mounting plate 1 facilitates the disassembly and assembly of the insulating grid sheet 2. The new insulating grid sheet 2 is then installed with the side plate 3 and the mounting plate 1, facilitating the replacement of the insulating grid sheet 2. If the insulating grid sheet 2 is installed too tightly or dust accumulates in the slot A5, making it difficult to remove, the protrusion C14 can be tapped from the rear side of the mounting plate 1 to knock the insulating grid sheet 2 out, preventing it from getting stuck. In summary, this invention provides the advantage of facilitating the replacement of the insulating grid sheet 2, solving the problem that existing arc-extinguishing covers typically use a hot-riveting process to connect the grid sheets, making disassembly difficult and hindering the individual replacement of the lower grid sheets.

[0017] Preferably, the mounting assembly further includes a protrusion A6 fixedly disposed on the side of the side plate 3 facing the mounting plate 1, and a fixing post 18 fixedly disposed on the front side of the protrusion A6. The protrusion A6 is located above the insulating grid sheet 2. The mounting strip 4 has a through-hole 7, and the fixing post 18 is inserted into the through-hole 7 and rotatably connected to the mounting strip 4. Because the mounting strip 4 has a through-hole 7, and the fixing post 18 is inserted into the through-hole 7 and rotatably connected to the mounting strip 4, it facilitates the rotation of the mounting strip 4.

[0018] Preferably, the mounting assembly further includes a protrusion B8 and a screw 9 fixedly disposed on the side of the side plate 3 facing the mounting plate 1. The protrusion B8 is located below the insulating grid sheet 2, and the protrusion B8 has a through hole 10 extending through it. The mounting strip 4 has a through hole 11 extending through it. The screw 9 is inserted into the through hole 11 and then screwed into the screw hole 10 to fix it to the mounting strip 4 and the protrusion B8. Since the screw 9 is inserted into the through hole 11 and then screwed into the screw hole 10 to fix it to the mounting strip 4 and the protrusion B8, it facilitates the fixing of the mounting strip 4.

[0019] Preferably, the front sidewall of the mounting plate 1 has several slots B12 that communicate with slot A5, and the rear end of the insulating grid sheet 2 is inserted into the slots B12 and abuts against the mounting plate 1. Because the rear end of the insulating grid sheet 2 is inserted into the slots B12 and abuts against the mounting plate 1, it makes the installation of the insulating grid sheet 2 more stable.

[0020] Preferably, a baffle 13 is fixedly provided on the front side of the fixing post 18, located in front of the mounting strip 4, and the diameter of the baffle 13 is larger than the diameter of the rotating hole 7. Since the diameter of the baffle 13 is larger than the diameter of the rotating hole 7, it serves to prevent the mounting strip 4 from falling off.

[0021] Preferably, a protrusion C14 is fixedly provided on the rear side of the insulating grid sheet 2, and a plurality of through slots 15 with connecting slots B12 are opened on the rear side wall of the mounting plate 1. The protrusion C14 is inserted into the through slot 15 and extends out from the rear side of the mounting plate 1. Since the protrusion C14 is inserted into the through slot 15 and extends out from the rear side of the mounting plate 1, when the insulating grid sheet 2 is installed too tightly or dust accumulates in the slot A5, making it difficult to pull out the insulating grid sheet 2, the protrusion C14 can be knocked out from the rear side of the mounting plate 1, thus preventing the insulating grid sheet 2 from getting stuck.

[0022] Preferably, a plurality of mounting blocks 16 are fixedly disposed on the left and right sides of the mounting plate 1, and the mounting blocks 16 are provided with through holes 17. Since the mounting blocks 16 are provided with through holes 17, it facilitates the installation of the mounting plate 1 with external parts.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An arc-extinguishing cover with convenient replacement of the grid, comprising a mounting plate (1), a plurality of insulating grid pieces (2) located on the front side of the mounting plate (1), characterized in that: The mounting plate (1) is provided with a mounting assembly, the mounting assembly comprises side plates (3) fixedly arranged on the left and right sides of the mounting plate (1), and mounting strips (4) located on the front side of the side plates (3), a plurality of slot A (5) penetrating through the front side wall of the side plate (3) are formed on the side wall of the mounting plate (1) facing the side plate (3), the slot A (5) is matched with the insulating grid piece (2), the insulating grid piece (2) is inserted into the slot A (5) and is in contact connection with the side plate (3) and the mounting plate (1), the top end of the mounting strip (4) is rotatably connected with the top end of the side plate (3), and the bottom end of the mounting strip (4) is detachably connected with the bottom end of the side plate (3); the mounting strip (4) is located on the front side of the insulating grid piece (2) and is in contact connection with the insulating grid piece (2).

2. An arc shield with easy replacement of the grid according to claim 1, characterized in that: The mounting assembly further comprises a protrusion A (6) fixedly arranged on the side of the side plate (3) facing the mounting plate (1), and a fixed column (18) fixedly arranged on the front side of the protrusion A (6), the protrusion A (6) is located above the insulating grid piece (2), and a rotating hole (7) is formed in the mounting strip (4) and penetrates through the mounting strip (4) from front to back, the fixed column (18) is inserted into the rotating hole (7) and is in rotatable connection with the mounting strip (4).

3. An arc quenching cover with easy replacement of the grid according to claim 1, characterized in that: The mounting assembly further comprises a protrusion B (8) fixedly arranged on the side of the side plate (3) facing the mounting plate (1) and a screw (9), the protrusion B (8) is located below the insulating grid piece (2), a screw hole (10) is formed in the protrusion B (8) and penetrates through the protrusion B (8) from front to back, a through hole (11) is formed in the mounting strip (4) and penetrates through the mounting strip (4) from front to back, and the screw (9) is inserted into the through hole (11) and is screwed into the screw hole (10) to be fixedly connected with the mounting strip (4) and the protrusion B (8).

4. An arc quenching shield with easy replacement of the grid according to claim 1, characterized in that: A plurality of slot B (12) in communication with the slot A (5) are formed in the front side wall of the mounting plate (1), and the rear end of the insulating grid piece (2) is inserted into the slot B (12) and is in abutting connection with the mounting plate (1).

5. An arc quenching shield with easy replacement of the grid according to claim 2, characterized in that: A stop disc (13) located on the front side of the mounting strip (4) is fixedly arranged on the front side of the fixed column (18), and the diameter of the stop disc (13) is greater than the diameter of the rotating hole (7).

6. An arc shield with easily replaceable grid according to claim 4, characterized in that: A protrusion C (14) is fixedly arranged on the rear side of the insulating grid piece (2), a plurality of through slot (15) in communication with the slot B (12) are formed in the rear side wall of the mounting plate (1), and the protrusion C (14) is inserted into the through slot (15) and extends out of the rear side of the mounting plate (1).

7. An arc quenching shield with easy replacement of the grid according to claim 1, characterized in that: A plurality of mounting blocks (16) are fixedly arranged on the left and right sides of the mounting plate (1), and a waist hole (17) penetrates through the mounting block (16) from front to back.

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