Arc extinguishing device for intelligent molded case circuit breaker
By designing an arc extinguishing device in an intelligent plastic shell circuit breaker, the coordination of limit strips, limit plates, rotating rods and plastic shrapnels is used to achieve convenient disassembly and replacement of arc extinguishing plates, and the extinguishing process in the existing technology is solved The problem of the difficulty of replacing the arc piece reduces the cost of repair and replacement.
Patent Information
- Application Number
- CN202421015159.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The arc extinguishing plates in existing smart plastic case circuit breakers are not easy to replace, resulting in high maintenance and replacement costs.
An arc extinguishing device for intelligent plastic shell circuit breaker is designed. By setting a limit bar and a limiting plate between the upper bracket and the lower bracket, the rotation rod and plastic shrapnel are used to facilitate disassembly and replace the arc extinguishing plate.
Through the above design, the disassembly and replacement of the arc extinguishing plate has become more convenient and quick, reducing the cost of repair and replacement, and solving the problem that the arc extinguishing plate is not easy to replace.
Smart Images
Figure CN222483270U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of arc extinguishing devices, in particular to an arc extinguishing device for an intelligent molded case circuit breaker. Background Art
[0002] Intelligent molded case circuit breaker, also known as device-type circuit breaker, is a switch device used to protect electrical equipment. Its molded case refers to the use of plastic insulators as the outer shell of the device, which is used to isolate the conductors and the grounded metal parts. All parts are sealed in the plastic shell. When the circuit is interrupted, a phenomenon called arc will occur in the circuit due to the sudden change of voltage and current. The transient voltage and transient current caused by the arc in the circuit will seriously affect the normal operation of electrical equipment and even cause electrical accidents. Therefore, the intelligent molded case circuit breaker is equipped with an arc extinguishing device to ensure the safety of circuit interruption.
[0003] The arc extinguishing piece of a conventional arc extinguishing device is riveted to a bracket. When a single arc extinguishing piece is damaged and needs to be replaced, the riveted connection makes it difficult to disassemble the arc extinguishing piece and easily damages the ceramic bracket, thereby increasing the cost of maintenance and replacement. Therefore, an arc extinguishing device for an intelligent molded case circuit breaker is proposed. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies of the prior art, the utility model provides an arc extinguishing device for an intelligent molded case circuit breaker to solve the problem that the arc extinguishing piece is difficult to replace as mentioned in the above background technology.
[0006] (II) Technical solution
[0007] To achieve the above purpose, the utility model provides the following technical solution: an arc extinguishing device for an intelligent molded case circuit breaker, comprising:
[0008] A lower bracket, an upper bracket and an arc-extinguishing piece, wherein the arc-extinguishing piece is arranged between the lower bracket and the upper bracket, a plurality of equally spaced sliding grooves are arranged inside the lower bracket, a limiting strip is arranged on the side of the arc-extinguishing piece outside close to the lower bracket, and the limiting strip is matched with the sliding groove, a limiting plate and a limiting block are arranged on the side of the arc-extinguishing piece outside close to the upper bracket, a slot is arranged on the side of the upper bracket close to the limiting plate, the limiting plate is matched with the slot, a limiting slot is arranged on the side of the upper bracket close to the limiting block, and the limiting block is matched with the limiting slot;
[0009] The side frame is arranged on both sides of the outside of the lower bracket and the upper bracket, and the two sides of the lower end of the upper bracket are provided with rotating rods, and a round hole is arranged on the side of the side frame close to the rotating rod, and the rotating rod is adapted to the round hole, and the lower end of the upper bracket is provided with plastic spring pieces on both sides of the upper end of the rotating rod, and a plastic hemisphere is arranged on the outside of the plastic spring piece, and limiting holes are arranged on both sides of the side frame close to the plastic hemisphere, and the limiting holes are adapted to the plastic hemisphere.
[0010] Preferably, a clamping groove is provided on one side of the rear end of the side frame, and the clamping groove is integrally formed with the side frame, the clamping groove is adapted to the lower bracket, and the clamping groove is used to clamp and fix the lower bracket.
[0011] Preferably, a baffle is provided at the lower end of the lower bracket and the upper bracket, and six square holes evenly distributed in a rectangular array are provided inside the baffle, and the square holes and the baffle are integrally formed, the lower bracket, the upper bracket, the side frame and the baffle are all made of ceramic material, and the arc extinguishing plate is made of steel.
[0012] Preferably, convex strips are provided at both ends of the exterior of the baffle, and the convex strips are integrally formed with the baffle.
[0013] Preferably, a groove is provided on one side of the side frame close to the baffle, and the groove is matched with the convex strip, and the convex strip is inserted into the groove so that the baffle can limit and fix the two side frames.
[0014] Preferably, a pull plate is provided on the front side of the lower end of the baffle, and the pull plate is integrally formed with the baffle, and the pull plate is used to pull the baffle.
[0015] (III) Beneficial effects
[0016] Compared with the prior art, the utility model provides an arc extinguishing device for an intelligent molded case circuit breaker, which has the following beneficial effects:
[0017] The utility model flips the upper bracket upward, and the flipping force is greater than the force generated by the plastic spring piece on the plastic hemisphere. The plastic hemisphere and the limiting hole are squeezed to cause the plastic spring piece to deform under force, and the plastic hemisphere disengages from the limiting hole. The upper bracket flips and tilts up with the rotating rod as the axis. At this time, the limiting groove disengages from the limiting block, and the limitation on the limiting block is cancelled. The arc extinguishing piece that needs to be replaced is pulled outward, and the limiting strip on one side of the arc extinguishing piece slides out inside the sliding groove. Then the new arc extinguishing piece is replaced and installed in the original way, and the upper bracket is covered. The plastic hemisphere is snapped into the limiting hole to fix the upper bracket to limit it, thereby fixing the arc extinguishing piece. The above method makes the disassembly of the arc extinguishing piece more convenient and quick, and solves the problems raised in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;
[0019] Figure 2 It is a three-dimensional diagram of the structure of the utility model in a separated state;
[0020] Figure 3 For the utility model Figure 2 A partial enlarged view of the middle A area;
[0021] Figure 4 For the utility model Figure 2 A partial enlarged view of the middle B area;
[0022] Figure 5 It is a three-dimensional diagram of the upper bracket of the utility model in the tilted state.
[0023] In the figure: 1. lower bracket; 2. upper bracket; 3. side bracket; 4. baffle; 5. arc extinguishing piece; 6. limit strip; 7. limit block; 8. limit plate; 9. slide groove; 10. slot; 11. limit groove; 12. square hole; 13. clamping groove; 14. groove; 15. convex strip; 16. round hole; 17. limit hole; 18. rotating rod; 19. plastic spring piece; 20. plastic hemisphere; 21. pull 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.
[0025] The utility model provides a technical solution, an arc extinguishing device for an intelligent molded case circuit breaker, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,include:
[0026] A lower bracket 1, an upper bracket 2 and an arc-extinguishing piece 5, wherein the arc-extinguishing piece 5 is arranged between the lower bracket 1 and the upper bracket 2, a plurality of equally spaced slide grooves 9 are arranged inside the lower bracket 1, a limiting strip 6 is arranged on the side of the arc-extinguishing piece 5 outside close to the lower bracket 1, and the limiting strip 6 is matched with the slide groove 9, a limiting plate 8 and a limiting block 7 are arranged on the side of the arc-extinguishing piece 5 outside close to the upper bracket 2, a slot 10 is arranged on the side of the upper bracket 2 close to the limiting plate 8, and the limiting plate 8 is matched with the slot 10, a limiting slot 11 is arranged on the side of the upper bracket 2 close to the limiting block 7, and the limiting block 7 is matched with the limiting slot 11;
[0027] The side frame 3 is arranged on both sides of the outside of the lower bracket 1 and the upper bracket 2, and a rotating rod 18 is arranged on both sides of the lower end of the upper bracket 2. A circular hole 16 is arranged on the side of the side frame 3 close to the rotating rod 18, and the rotating rod 18 is adapted to the circular hole 16. Plastic spring pieces 19 are arranged on both sides of the lower end of the upper bracket 2 located at the upper end of the rotating rod 18, and a plastic hemisphere 20 is arranged on the outside of the plastic spring piece 19. Limiting holes 17 are arranged on both sides of the side frame 3 close to the plastic hemisphere 20, and the limiting holes 17 are adapted to the plastic hemisphere 20.
[0028] See also Figure 2 A clamping groove 13 is provided on one side of the rear end of the side frame 3, and the clamping groove 13 is integrally formed with the side frame 3, and the clamping groove 13 is adapted to the lower bracket 1, and the clamping groove 13 is used to clamp and fix the lower bracket 1.
[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A baffle 4 is provided at the lower ends of the lower bracket 1 and the upper bracket 2, and six square holes 12 evenly distributed in a rectangular array are provided inside the baffle 4, and the square holes 12 are integrally formed with the baffle 4. The lower bracket 1, the upper bracket 2, the side frame 3 and the baffle 4 are all made of ceramic materials, and the arc-extinguishing sheet 5 is made of steel.
[0030] See also Figure 2 and Figure 3 Both ends of the outer side of the baffle plate 4 are provided with convex strips 15, and the convex strips 15 and the baffle plate 4 are integrally formed.
[0031] See also Figure 2 and Figure 3 A groove 14 is provided on one side of the side frame 3 close to the baffle 4 , and the groove 14 is matched with the convex strip 15 . The convex strip 15 is inserted into the groove 14 so that the baffle 4 limits and fixes the two side frames 3 .
[0032] See also Figure 1 and Figure 2 A pull plate 21 is provided on the front side of the lower end of the baffle 4 , and the pull plate 21 is integrally formed with the baffle 4 , and the pull plate 21 is used to pull the baffle 4 .
[0033] This solution: when the arc extinguishing piece 5 needs to be replaced, the upper bracket 2 is flipped upward. The flipping force is greater than the force generated by the plastic spring piece 19 on the plastic hemisphere 20. The plastic hemisphere 20 and the limiting hole 17 are squeezed to cause the plastic spring piece 19 to deform under force, and the plastic hemisphere 20 is separated from the limiting hole 17. The upper bracket 2 is flipped and tilted with the rotating rod 18 as the axis. At this time, the limiting groove 11 is separated from the limiting block 7, and the limiting of the limiting block 7 is cancelled. The arc extinguishing piece 5 to be replaced is pulled outward, and the limiting strip 6 on one side of the arc extinguishing piece 5 slides out inside the slide groove 9. Then, the new arc extinguishing piece 5 is replaced and installed in the original way, and the upper bracket 2 is covered. The plastic hemisphere 20 is inserted into the limiting hole 17 to fix the upper bracket 2, thereby fixing the arc extinguishing piece 5. The above method makes the removal of the arc extinguishing piece 5 more convenient and quick. The baffle 4 plays a role in blocking the movement of the arc, and the heat inside the arc extinguishing grid can be discharged through the square hole 12.
[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An arc extinguishing device for an intelligent molded case circuit breaker, characterized in that: include: A lower bracket (1), an upper bracket (2) and an arc extinguishing piece (5), wherein the arc extinguishing piece (5) is arranged between the lower bracket (1) and the upper bracket (2), a plurality of equally spaced sliding grooves (9) are arranged inside the lower bracket (1), a limiting strip (6) is arranged on the outer side of the arc extinguishing piece (5) close to the lower bracket (1), and the limiting strip (6) is matched with the sliding groove (9), a limiting plate (8) and a limiting block (7) are arranged on the outer side of the arc extinguishing piece (5) close to the upper bracket (2), a slot (10) is arranged on the inner side of the upper bracket (2) close to the limiting plate (8), and the limiting plate (8) is matched with the slot (10), and a limiting slot (11) is arranged on the inner side of the upper bracket (2) close to the limiting block (7), and the limiting block (7) is matched with the limiting slot (11); The side frame (3) is arranged on both sides of the outside of the lower frame (1) and the upper frame (2); the lower end of the upper frame (2) is provided with a rotating rod (18) on both sides; the inside of the side frame (3) is provided with a round hole (16) on one side close to the rotating rod (18), and the rotating rod (18) is matched with the round hole (16); the lower end of the upper frame (2) is provided with plastic spring pieces (19) on both sides of the upper end of the rotating rod (18); the outside of the plastic spring piece (19) is provided with a plastic hemisphere (20); the inside of the side frame (3) is provided with a limiting hole (17) on both sides close to the plastic hemisphere (20), and the limiting hole (17) is matched with the plastic hemisphere (20).
2. The arc extinguishing device for an intelligent molded case circuit breaker according to claim 1, characterized in that: A clamping groove (13) is provided on one side of the rear end of the side frame (3), and the clamping groove (13) and the side frame (3) are integrally formed, and the clamping groove (13) is adapted to the lower bracket (1).
3. The arc extinguishing device for an intelligent molded case circuit breaker according to claim 1, characterized in that: A baffle (4) is provided at the lower ends of the lower bracket (1) and the upper bracket (2); six square holes (12) are evenly distributed in a rectangular array inside the baffle (4); the square holes (12) and the baffle (4) are integrally formed; the lower bracket (1), the upper bracket (2), the side frame (3) and the baffle (4) are all made of ceramic material; and the arc extinguishing sheet (5) is made of steel.
4. The arc extinguishing device for an intelligent molded case circuit breaker according to claim 3, characterized in that: Both ends of the outside of the baffle (4) are provided with convex strips (15), and the convex strips (15) and the baffle (4) are integrally formed.
5. The arc extinguishing device for an intelligent molded case circuit breaker according to claim 4, characterized in that: A groove (14) is provided on one side of the side frame (3) close to the baffle (4), and the groove (14) is matched with the convex strip (15).
6. The arc extinguishing device for an intelligent molded case circuit breaker according to claim 5, characterized in that: A pull plate (21) is provided on the front side of the lower end of the baffle plate (4), and the pull plate (21) and the baffle plate (4) are integrally formed.