Direct-current high-voltage large-current miniature circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a direct-current high-voltage large-current miniature circuit breaker, which comprises a circuit breaker main body, radiating fins, a cleaning assembly and an angle positioning assembly. According to the utility model, through the arrangement of the cooling fins, the cleaning assembly and the angle positioning assembly, the heat inside the circuit breaker main body can be quickly discharged out through the heat absorption of the cooling fins in the heat generation process of the circuit breaker main body, and when the cooling fins are used for a long time, the heat inside the circuit breaker main body can be quickly discharged out. Dust generated in the groove can be quickly cleaned through movement of the cleaning assembly, and when the cleaning assembly does not conduct cleaning, the cleaning assembly can be made not to continue to be located in the cooling fins any more in a rotating mode, so that the efficiency of the cooling fins during cooling work cannot be affected, and the cooling efficiency of the cooling fins is improved. And through the angle positioning assembly, after the angle of the cleaning assembly is adjusted to the designated position, position fixing can be rapidly achieved.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically a DC high voltage high current miniature circuit breaker. Background Technology

[0002] In power systems, circuit breakers are crucial devices whose primary function is to protect circuits and equipment from damage caused by overloads, short circuits, and other faults. When an overload or short circuit occurs in a circuit, the circuit breaker can quickly interrupt the current, thereby preventing the fault from escalating and ensuring the safe and stable operation of the power system.

[0003] According to Chinese Publication No. CN220065582U, a DC high-voltage high-current miniature circuit breaker includes a circuit breaker body and a stabilizing structure. The lower part of the circuit breaker body has an integrally formed top cover, and the left-center part of the circuit breaker body has an integrally formed arc-damping cover. The stabilizing structure includes a stabilizing frame, with a pad integrally formed on the left side inside the stabilizing frame. A telescopic rod is inserted into the pad, and rubber blocks are adhered to both sides of the telescopic rod. A handle spring is integrally formed at the top of the handle, and an indicator is integrally formed on the right side of the handle within the circuit breaker body. A locking spring is integrally formed at the bottom of the indicator within the circuit breaker body, and a main shaft is integrally formed below the locking spring. The locking spring is movably connected to the main spring. This DC high-voltage high-current miniature circuit breaker has the advantages of having a stabilizing structure installed inside the circuit breaker body, which replaces the original reset spring to enhance the stability of the internal structures of the circuit breaker body.

[0004] When a circuit breaker breaks a circuit, it is easy to generate an electric arc. Because the temperature of the electric arc is extremely high, reaching thousands of degrees Celsius, it releases a large amount of heat energy instantly. The continuous accumulation of heat can easily lead to problems such as the failure of lubricating oil in the internal mechanical structure of the circuit breaker and the expansion and deformation of components, thereby affecting the normal operation and reliability of the circuit breaker. Utility Model Content

[0005] The purpose of this invention is to provide a DC high-voltage high-current miniature circuit breaker to solve the problems mentioned in the background art, such as the failure of lubricating oil in the internal mechanical structure of the circuit breaker and the expansion and deformation of components, which affect the normal operation and reliability of the circuit breaker.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a DC high-voltage high-current miniature circuit breaker, comprising: a circuit breaker body, a heat sink, a cleaning assembly, an angle positioning assembly, and fins. The heat sink is fixed on both sides of the outer wall of the circuit breaker body, and the heat sink has multiple fins arranged side by side at intervals. The cleaning assembly is disposed on the outer wall of the circuit breaker body and located outside the heat sink. The cleaning assembly includes a fixing block disposed on the outer wall of the circuit breaker body and located outside the heat sink, a rectangular hole opened on the fixing block, a connecting rod slidably connected inside the rectangular hole, the connecting rod being rotatably connected inside the rectangular hole, and a cleaning brush fixed on one side of the outer wall of the connecting rod. The opening direction of the rectangular hole is consistent with the direction of the fins arranged side by side. The angle positioning assembly is disposed on the outer wall of the fixing block and is engaged with the connecting rod to limit the rotation of the connecting rod.

[0007] By adopting the above technical solution, stable heat dissipation of the circuit breaker body and rapid dust cleaning of the heat sink used for heat dissipation can be achieved.

[0008] Preferably, the cleaning component further includes a positioning protrusion fixed to the top of the connecting rod. The positioning protrusion consists of a disc and two sets of convex blocks integrally formed on the outer wall of the disc. The two sets of convex blocks are arranged at 90° intervals. The angle positioning component includes a track fixed to one side of the rectangular hole on the outer wall of the fixed block and a movable block slidably connected to the track. The movable block engages with the positioning protrusion.

[0009] By adopting the above technical solution, stable displacement can be achieved on the track.

[0010] Preferably, the angle positioning component further includes a connecting shaft fixed on the outer wall of the moving block and a locking block slidably connected to the connecting shaft, wherein the locking block has a groove that matches the convex block of the positioning protrusion.

[0011] By adopting the above technical solution, the card block can move stably on the connecting shaft.

[0012] Preferably, the angle positioning component further includes a second spring sleeved on the connecting shaft.

[0013] By adopting the above technical solution, the No. 2 spring can drive the structure on one side to move through its own elastic force.

[0014] Preferably, the cleaning assembly further includes a sleeve disposed on the top of the positioning protrusion, a connecting handle disposed at one end inside the sleeve, and a No. 1 spring disposed at both ends on the connecting handle and the outer wall of the fixing block, respectively.

[0015] By adopting the above technical solution, the handle can cause the connected structure to move together during the movement.

[0016] In summary, this utility model has the following beneficial effects: by providing a heat sink, a cleaning component, and an angle positioning component, the heat generated by the circuit breaker body can be quickly dissipated to the outside through the absorption of heat by the fins inside the heat sink during the heat generation process. When the fins inside the heat sink are used for a long time, the dust generated inside the grooves can be quickly cleaned by the movement of the cleaning component. When the cleaning component is not cleaning, it can be rotated to prevent it from remaining inside the heat sink, thus not affecting the efficiency of the heat sink in heat dissipation. The angle positioning component can quickly fix the position after the cleaning component is adjusted to the specified position. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the cleaning component and the angle positioning component of this utility model;

[0019] Figure 3 For the present utility model Figure 2 Unfold a three-dimensional structural diagram;

[0020] Figure 4 For the present utility model Figure 2 A magnified view of the three-dimensional structure at point A.

[0021] In the diagram: 1. Circuit breaker body; 2. Heat sink; 3. Cleaning assembly; 301. Fixing block; 302. Rectangular hole; 303. Connecting rod; 304. Cleaning brush; 305. Positioning protrusion; 306. Sleeve; 307. Connecting handle; 308. Spring No. 1; 4. Angle positioning assembly; 401. Rail; 402. Moving block; 403. Connecting shaft; 404. Locking block; 405. Spring No. 2; 5. Fin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-4 The embodiments of this utility model will be described in further detail.

[0024] Please see Figures 1-4This embodiment provides a technical solution: a DC high voltage high current miniature circuit breaker, comprising: circuit breaker body 1, heat sink 2, cleaning assembly 3 and angle positioning assembly 4.

[0025] The main body 1 of the circuit breaker consists of a contact system, an arc extinguishing system, an operating mechanism, a trip unit, and a housing. The contact system is responsible for conducting and interrupting the current, the arc extinguishing system is used to extinguish the electric arc generated when the circuit is disconnected, the operating mechanism realizes the manual or electric operation of the circuit breaker, and the trip unit is the key component that senses the circuit abnormality and triggers the circuit breaker to trip. The above is the existing technology and will not be described in detail below.

[0026] Heat sink 2 is fixed on both sides of the outer wall of the circuit breaker body 1, and multiple fins 5 are arranged side by side at intervals on the heat sink 2.

[0027] The cleaning component 3 is installed on the outer wall of the circuit breaker body 1 and located outside the heat sink 2. The cleaning component 3 includes a fixing block 301 installed on the outer wall of the circuit breaker body 1 and located outside the heat sink 2, a rectangular hole 302 opened on the fixing block 301, a connecting rod 303 slidably connected inside the rectangular hole 302, and the connecting rod 303 is rotatably connected inside the rectangular hole 302. A cleaning brush 304 is fixed on one side of the outer wall of the connecting rod 303. The opening direction of the rectangular hole 302 is consistent with the direction in which the fins 5 are arranged side by side. An angle positioning component 4 is installed on the outer wall of the fixing block 301 and is engaged with the connecting rod 303 to limit the rotation of the connecting rod 303.

[0028] The cleaning component 3 also includes a positioning protrusion 305 fixed to the top of the connecting rod 303. The positioning protrusion 305 consists of a disc and two sets of protruding blocks integrally formed on the outer wall of the disc. The two sets of protruding blocks are arranged at a 90° interval.

[0029] The angle positioning component 4 includes a track 401 fixed on the outer wall of the fixed block 301 located on one side of the rectangular hole 302 and a movable block 402 slidably connected to the track 401. The movable block 402 is engaged with the positioning protrusion 305. The angle positioning component 4 also includes a connecting shaft 403 fixed on the outer wall of the movable block 402 and a locking block 404 slidably connected to the connecting shaft 403. The locking block 404 has a groove that matches the convex block of the positioning protrusion 305.

[0030] The angle positioning component 4 also includes a second spring 405 sleeved on the connecting shaft 403, and the cleaning component 3 also includes a sleeve 306 set at the top of the positioning protrusion 305, a connecting handle 307 with one end set inside the sleeve 306, and a first spring 308 with both ends set on the connecting handle 307 and the outer wall of the fixing block 301 respectively.

[0031] The implementation principle of this utility model of a DC high-voltage high-current miniature circuit breaker is as follows:

[0032] First, the heat generated by the internal structure of the circuit breaker body 1 during operation can be absorbed by the externally installed heat sink 2, and then the absorbed heat can be quickly discharged through the fins 5 of the heat sink 2. When it is necessary to clean the fins 5 of the heat sink 2 by cleaning component 3, the cleaning component 3 can be rotated to move into the fins 5 of the heat sink 2, and the dust on the fins 5 of the heat sink 2 can be cleaned by displacement. When the cleaning component 3 is rotated to a specified angle, it can be quickly fixed by the angle positioning component 4.

[0033] Secondly, the connecting rod 303 inside the rectangular hole 302 of the rotating fixing block 301 is rotated so that the side of the connecting rod 303 with the cleaning brush 304 rotates into the interior of the heat sink 2. At this time, it is moved by holding the connecting handle 307. Because the connecting handle 307 is connected to the connecting rod 303 by rotating and connecting to the sleeve 306 above the positioning protrusion 305, the rotation of the connecting rod 303 will not affect the connecting handle 307. When the connecting handle 307 is held and moved, it can drive the connecting rod 303 and the external cleaning brush 304 to move synchronously, so that the dust on the surface of the fins 5 of the heat sink 2 can be cleaned by the cleaning brush 304. When the connecting handle 307 is no longer held, the connecting handle 307 is pulled back by the elastic force of the first spring 308, so that the connecting rod 303 returns to its original position inside the rectangular hole 302.

[0034] Finally, when the connecting rod 303 and the positioning protrusion 305 on the top are rotated to the specified angle, the locking block 404 can move on the connecting shaft 403, and the second spring 405 on the connecting shaft 403 will push the locking block 404 to move. At this time, the locking block 404 will engage with the positioning protrusion 305, thereby achieving the angular positioning effect between the positioning protrusion 305 and the connecting rod 303. When the connecting rod 303 moves in the future, the connecting shaft 403 is connected to the moving block 402, which synchronously drives the moving block 402 to achieve stable displacement on the track 401.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A DC high-voltage high-current miniature circuit breaker, characterized in that, include: Circuit breaker body (1); Heat sink (2), the heat sink (2) is fixed on both sides of the outer wall of the circuit breaker body (1), and the heat sink (2) is provided with a plurality of fins (5) arranged side by side at intervals; A cleaning component (3) is provided on the outer wall of the circuit breaker body (1) and located outside the heat sink (2). The cleaning component (3) includes a fixing block (301) provided on the outer wall of the circuit breaker body (1) and located outside the heat sink (2), a rectangular hole (302) opened on the fixing block (301), a connecting rod (303) slidably connected inside the rectangular hole (302), and a cleaning brush (304) rotatably connected inside the rectangular hole (302) and fixed on one side of the outer wall of the connecting rod (303). The opening direction of the rectangular hole (302) is consistent with the direction of the fins (5) arranged side by side. Angle positioning component (4) is disposed on the outer wall of the fixed block (301) and is engaged with the connecting rod (303) to limit the rotation of the connecting rod (303).

2. The DC high-voltage high-current miniature circuit breaker according to claim 1, characterized in that: The cleaning component (3) also includes a positioning protrusion (305) fixed at the top of the connecting rod (303). The positioning protrusion (305) consists of a disc and two sets of convex blocks integrally formed on the outer wall of the disc of the positioning protrusion (305). The two sets of convex blocks are arranged at a 90° interval. The angle positioning component (4) includes a track (401) fixed on the outer wall of the fixed block (301) on one side of the rectangular hole (302) and a movable block (402) slidably connected to the track (401). The movable block (402) is engaged with the positioning protrusion (305).

3. A DC high-voltage high-current miniature circuit breaker according to claim 2, characterized in that: The angle positioning component (4) further includes a connecting shaft (403) fixed on the outer wall of the moving block (402) and a locking block (404) slidably connected to the connecting shaft (403). The locking block (404) has a groove that matches the convex block of the positioning protrusion (305).

4. A DC high-voltage high-current miniature circuit breaker according to claim 3, characterized in that: The angle positioning component (4) also includes a second spring (405) sleeved on the connecting shaft (403).

5. A DC high-voltage high-current miniature circuit breaker according to claim 2, characterized in that: The cleaning assembly (3) also includes a sleeve (306) disposed at the top of the positioning protrusion (305), a connecting handle (307) disposed at one end inside the sleeve (306), and a No. 1 spring (308) disposed at both ends on the outer wall of the connecting handle (307) and the fixing block (301).

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