Arc extinguish chamber of circuit breaker

Abstract

The utility model relates to the technical field of circuit breaker arc extinguish chambers, in particular to a circuit breaker arc extinguish chamber, which comprises a base, two fixed shells are fixedly connected to the outer side wall of the base, a plurality of protective covers are fixedly mounted on the outer side wall of the base and positioned between the two fixed shells, and protective mechanisms are arranged above the two fixed shells. Two fixing rings are fixedly connected to the bottom face of the base, bent pipes are inserted into the two fixing rings and fixedly connected with the base, a cavity is formed in the base, the protection mechanism comprises a transverse plate and two inserting grooves, and the transverse plate is arranged above the fixing shell. According to the arc extinguish chamber, the protection effect on the end part of the arc extinguish sheet is ensured, the top part of the arc extinguish sheet is prevented from being damaged during arc extinguish, the service life of the arc extinguish chamber is prolonged, and the bent pipe, the telescopic connecting pipe and the short pipe are matched with the connecting ring to meet the exhaust requirements of the arc extinguish chamber in different outward directions and distances.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breaker arc-extinguishing chambers, specifically to circuit breaker arc-extinguishing chambers. Background Technology

[0002] The arc-extinguishing chamber of a circuit breaker is an important device used to limit the spatial location of an electric arc and accelerate its extinction. The arc-extinguishing chamber plays a vital role in the power system and is one of the important devices to ensure the safe and stable operation of the power system.

[0003] In the prior art, such as the arc-extinguishing chamber of a circuit breaker proposed in patent application number "CN202321411014.3", the arc-extinguishing chamber includes a side plate and a grid plate. The two side plates are arranged opposite to each other, and the side walls of the two side plates are respectively provided with guide grooves extending in a first direction. One of the side plates is provided with a support block and a limiting block. One end of the grid plate is provided with a first boss and a second boss. This can reduce the assembly difficulty of the arc-extinguishing chamber, improve the processability and assembly efficiency, reduce costs, improve assembly quality, and improve the consistency of circuit breaker products.

[0004] However, in the aforementioned patent application, when the arc is extinguished through the arc-extinguishing chamber, the arc moves at a high speed, and the end of the arc-extinguishing plate is easily subjected to the impact and wear of the arc, resulting in damage. The aforementioned patent application cannot protect the end of the arc-extinguishing plate, which affects the service life of the arc-extinguishing plate. Utility Model Content

[0005] The purpose of this invention is to provide an arc-extinguishing chamber for circuit breakers to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] The arc-extinguishing chamber of a circuit breaker includes a base, two fixed outer shells are fixedly connected to the outer wall of the base, several protective covers are fixedly installed on the outer wall of the base between the two fixed outer shells, a protective mechanism is provided above the two fixed outer shells, two fixed rings are fixedly connected to the bottom surface of the base, a bent pipe is inserted inside the two fixed rings, and the two bent pipes are fixedly connected to the base, and a cavity is opened inside the base.

[0008] The protective mechanism includes a horizontal plate and two slots. The horizontal plate is positioned above the fixed outer shell. Several protective covers are fixedly connected to the outer wall of the horizontal plate, and the protective covers are evenly distributed.

[0009] Preferably, the two slots are respectively opened on the upper surface of the fixed housing and near the sides, and connecting plates are fixedly connected to the bottom surface of the horizontal plate and near both ends.

[0010] Preferably, the slot has slots on both inner sidewalls, and a connecting strip is fixedly connected to the bottom surface of the connecting plate.

[0011] Preferably, a V-shaped spring is fixedly connected to the bottom end of the connecting strip, and a locking block is fixedly connected to both outer side walls of the V-shaped spring, and the locking block fits into the locking groove.

[0012] Preferably, a plurality of exhaust pipes are fixedly connected to the outer wall of the base, and two reinforcing plates are fixedly connected to the outer wall of the exhaust pipes, and the two reinforcing plates are respectively fixedly connected to two arc-extinguishing plates.

[0013] Preferably, a one-way valve is installed on the outer wall of the bend, a telescopic connecting pipe is fixedly connected to one end of the bend, a short pipe is fixedly connected to the end of the telescopic connecting pipe away from the bend, and a connecting ring is fixedly connected to the outer wall of the bend and located inside the fixing ring, and a plurality of fixing holes are opened on the outer wall of the connecting ring.

[0014] Preferably, a fixing plate is fixedly connected to the outer wall of the fixing ring, and a fixing nail is inserted into the outer wall of the fixing plate, and the fixing nail fits into the fixing hole.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model fixes the position of the horizontal plate by inserting two connecting plates installed on the bottom surface of the horizontal plate into two slots, and using V-shaped springs, locking blocks and slots. This ensures that all the protective covers connected to the horizontal plate are fixed to the ends of the arc-extinguishing disc, protecting the ends of the arc-extinguishing disc and preventing damage to the top of the arc-extinguishing disc during arc extinguishing. This extends the service life of the arc-extinguishing chamber. Furthermore, the arc-extinguishing disc is made of a gas-generating material, which increases the gas production when an electric arc passes by, improving the arc-extinguishing effect. Similarly, when the protective cover is damaged, it can be easily replaced to ensure the protection effect on the ends of the arc-extinguishing disc.

[0017] 2. In this utility model, by opening the one-way valve, the excess air generated during the arc extinguishing process in the arc extinguishing chamber can be discharged into the cavity through each reinforcing plate, and then discharged through the bend pipe, telescopic connecting pipe and short pipe. By rotating the connecting ring, the bend pipe can be rotated, thereby adjusting the orientation of the telescopic connecting pipe and short pipe connected to the bend pipe to adapt to the exhaust requirements of different positions. By lengthening the telescopic connecting pipe, the short pipe can be moved to adjust the exhaust requirements of different positions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0021] Figure 3 This is a cross-sectional view of the fixed outer shell in this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the V-shaped spring and the locking block in this utility model;

[0024] Figure 6 This is a sectional view of the base in this utility model;

[0025] Figure 7 This is a cross-sectional view of the fixing ring in this utility model.

[0026] The attached figures are labeled as follows:

[0027] 1. Base; 2. Fixed outer shell; 3. Arc extinguishing plate; 4. Horizontal plate; 5. Protective cover; 6. Bend; 7. Telescopic connecting pipe; 8. Short pipe; 9. Connecting plate; 10. Connecting strip; 11. V-shaped spring; 12. Slot; 13. Card slot; 14. Card block; 15. Exhaust pipe; 16. Cavity; 17. Reinforcing plate; 18. Connecting ring; 19. Fixing ring; 20. Fixing plate; 21. Fixing nail; 22. Fixing hole; 23. One-way valve. Detailed Implementation

[0028] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Circuit breaker arc-extinguishing chamber, such as Figures 1-7As shown, the system includes a base 1, with two fixed outer shells 2 fixedly connected to the outer wall of the base 1. Several protective covers 5 are fixedly installed on the outer wall of the base 1 between the two fixed outer shells 2. A protective mechanism is provided above each of the two fixed outer shells 2. Two fixed rings 19 are fixedly connected to the bottom surface of the base 1. A bent tube 6 is inserted into the two fixed rings 19, and the two bent tubes 6 are fixedly connected to the base 1. A cavity 16 is opened inside the base 1. The protective mechanism includes a horizontal plate 4 and two slots 12. The horizontal plate 4 is located above the fixed outer shells 2. Several protective covers 5 are fixedly connected to the outer wall of the horizontal plate 4, and the several protective covers 5 are evenly distributed.

[0030] Two slots 12 are respectively opened on the upper surface of the fixed housing 2 and near the sides. Connecting plates 9 are fixedly connected to the bottom surface of the horizontal plate 4 and near both ends. The two inner side walls of the slots 12 are provided with slots 13. Connecting strips 10 are fixedly connected to the bottom surface of the connecting plate 9. V-shaped spring pieces 11 are fixedly connected to the bottom end of the connecting strips 10. The two outer side walls of the V-shaped spring pieces 11 are fixedly connected with locking blocks 14, and the locking blocks 14 fit into the slots 13. Under the action of the rebound force of the V-shaped spring pieces 11, the locking blocks 14 can be driven into the slots 13, thereby fixing the position of the connecting plate 9 in the slots 12.

[0031] In use, the two connecting plates 9 mounted on the bottom surface of the horizontal plate 4 are respectively inserted into the two slots 12 opened on the fixed housing 2. The protective covers 5 connected to the horizontal plate 4 are then sequentially fitted onto the ends of the arc-extinguishing plates 3. The V-shaped spring pieces 11 connected by the connecting strip 10 are inserted into the slots 12 along with the connecting plates 9. The two locking blocks 14 mounted on the V-shaped spring pieces 11 move with the V-shaped spring pieces 11. The inclined surfaces of the locking blocks 14 move down along the inner wall of the slot 12, causing one end of the V-shaped spring piece 11 to deform and move closer to the connecting strip 10. Both ends of the entire V-shaped spring piece 11 are bent inwards. When the locking blocks 14 move to one side of the slot 13, the rebound force of the V-shaped spring piece 11 can drive the locking blocks 14 into the slot 13. Within 3, the position of the connecting plate 9 is fixed in the slot 12, thereby fixing the position of the horizontal plate 4, so that each protective cover 5 connected on the horizontal plate 4 is fixed to the end of the arc extinguishing plate 3, protecting the end of the arc extinguishing plate 3, preventing the end of the arc extinguishing plate 3 from being easily damaged during arc extinguishing, improving service life, and the arc extinguishing plate 3 is made of gas-generating material, which can increase the gas generation when the subsequent arc passes by, improving the arc extinguishing effect. When the protective cover 5 is damaged, the horizontal plate 4 is pulled away from the fixed outer shell 2 in the same way, which can also make the locking block 14 move out of the slot 13, releasing the fixation of the connecting plate 9, thereby driving each protective cover 5 to move out, realizing convenient replacement of the protective cover 5, and ensuring the protective effect on the end of the arc extinguishing plate 3;

[0032] The electric arc generated when the circuit breaker is disconnected can be diffused and eliminated by the arc-extinguishing plate 3 in the arc-extinguishing chamber.

[0033] Several exhaust pipes 15 are fixedly connected to the outer wall of the base 1. Two reinforcing plates 17 are fixedly connected to the outer wall of the exhaust pipes 15, and the two reinforcing plates 17 are fixedly connected to two arc extinguishing plates 3 respectively. The two reinforcing plates 17 can support and reinforce the position between the two arc extinguishing plates 3, making the position of each arc extinguishing plate 3 more stable.

[0034] A one-way valve 23 is installed on the outer wall of the bend 6. A telescopic connecting pipe 7 is fixedly connected to one end of the bend 6. A short pipe 8 is fixedly connected to the end of the telescopic connecting pipe 7 away from the bend 6. A connecting ring 18 is fixedly connected to the outer wall of the bend 6 and inside the fixing ring 19. Several fixing holes 22 are opened on the outer wall of the connecting ring 18. A fixing plate 20 is fixedly connected to the outer wall of the fixing ring 19. Fixing nails 21 are inserted into the outer wall of the fixing plate 20, and the fixing nails 21 fit into the fixing holes 22. By passing the fixing nails 21 through the fixing plate 20 and inserting them into the corresponding fixing holes 22, the position between the connecting ring 18 and the fixing ring 19 can be fixed.

[0035] Specifically, opening the one-way valve 23 allows the bend 6 to connect to the cavity 16 inside the base 1, enabling excess air generated during arc extinguishing within the arc-extinguishing chamber to be discharged into the cavity 16 through the reinforcing plates 17, and then discharged through the bend 6, the telescopic connecting pipe 7, and the short pipe 8. Pulling the fixing pin 21 from the fixing plate 20 releases the fixing of the connecting ring 18. At this point, the connecting ring 18 can be rotated, causing the bend 6 to rotate, thereby adjusting the orientation of the telescopic connecting pipe 7 and the short pipe 8 connected to the bend 6 to meet the exhaust requirements of different positions. After adjustment, inserting the fixing pin 21 through the fixing plate 20 into the corresponding fixing hole 22 re-fixes the position of the connecting ring 18, thereby fixing the orientation of the bend 6, the telescopic connecting pipe 7, and the short pipe 8. Furthermore, by stretching the telescopic connecting pipe 7, the short pipe 8 can be moved to adjust the exhaust requirements of different positions.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A circuit breaker arc-extinguishing chamber, comprising a base (1), characterized in that, The outer wall of the base (1) is fixedly connected to two fixed shells (2). Several protective covers (5) are fixedly installed on the outer wall of the base (1) between the two fixed shells (2). A protective mechanism is provided above the two fixed shells (2). The bottom surface of the base (1) is fixedly connected to two fixed rings (19). A bent tube (6) is inserted inside the two fixed rings (19), and the two bent tubes (6) are fixedly connected to the base (1). A cavity (16) is opened inside the base (1). The protective mechanism includes a horizontal plate (4) and two slots (12). The horizontal plate (4) is positioned above the fixed outer shell (2). Several protective covers (5) are fixedly connected to the outer wall of the horizontal plate (4), and the several protective covers (5) are evenly distributed.

2. The circuit breaker arc-extinguishing chamber according to claim 1, characterized in that, The two slots (12) are respectively opened on the upper surface of the fixed housing (2) and near the sides, and the bottom surface of the horizontal plate (4) and near both ends are fixedly connected to the connecting plates (9).

3. The circuit breaker arc-extinguishing chamber according to claim 2, characterized in that, The slot (12) has slots (13) on both inner sidewalls, and the bottom surface of the connecting plate (9) is fixedly connected with a connecting strip (10).

4. The circuit breaker arc-extinguishing chamber according to claim 3, characterized in that, The bottom end of the connecting strip (10) is fixedly connected to a V-shaped spring piece (11), and both outer side walls of the V-shaped spring piece (11) are fixedly connected to a locking block (14), and the locking block (14) fits into the locking groove (13).

5. The circuit breaker arc-extinguishing chamber according to claim 1, characterized in that, The outer wall of the base (1) is fixedly connected to several exhaust pipes (15), and the outer wall of the exhaust pipes (15) is fixedly connected to two reinforcing plates (17), and the two reinforcing plates (17) are respectively fixedly connected to two arc extinguishing plates (3).

6. The circuit breaker arc-extinguishing chamber according to claim 1, characterized in that, A one-way valve (23) is installed on the outer wall of the bend (6). A telescopic connecting pipe (7) is fixedly connected to one end of the bend (6). A short pipe (8) is fixedly connected to the end of the telescopic connecting pipe (7) away from the bend (6). A connecting ring (18) is fixedly connected to the outer wall of the bend (6) and located inside the fixing ring (19). Several fixing holes (22) are opened on the outer wall of the connecting ring (18).

7. The circuit breaker arc-extinguishing chamber according to claim 6, characterized in that, A fixing plate (20) is fixedly connected to the outer wall of the fixing ring (19). A fixing nail (21) is inserted into the outer wall of the fixing plate (20), and the fixing nail (21) fits into the fixing hole (22).

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