Protective structure of molded case circuit breaker
By designing anti-detachment mechanisms and fire extinguishing mechanisms in the plastic-shell circuit breaker, the problems of wire disengagement and fire extinguishing are solved, clamping and reinforcement of the wires and effective fire extinguishing of the electrically controlled box fire are achieved, and the safety of the circuit breaker is improved.
Patent Information
- Application Number
- CN202421928696.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The plastic-shell circuit breakers on the market cannot clamp and reinforce the connected wires, which makes it easy to disengage when dragged, and cannot provide temporary fixing connections when the wire fixing screws are lost, and cannot extinguish the fire, making it difficult to control the fire.
A protective structure of plastic shell circuit breaker is designed, including an anti-detachment mechanism and a fire extinguishing mechanism. The anti-detachment mechanism realizes clamping and reinforcement of the conductor through the cooperation of screws, turntables, guide rods and plywoods; the fire extinguishing mechanism uses the design of fire extinguishing cylinders, rubber columns, square rods and connecting ropes to break the connecting ropes by flames, and the spring rebounds to discharge the fire extinguishing material, achieving the fire extinguishing effect.
It effectively avoids the wire being disconnected from the circuit breaker when dragged, and provides temporary fixing connection when the wire fixing screw is lost, ensuring the stable use of the circuit breaker. In addition, it can effectively extinguish the fire when the electric control box catches fire to prevent the fire from expanding.
Smart Images
Figure CN222914700U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a protective structure for a molded case circuit breaker. Background Technique
[0002] A molded case circuit breaker is a device used for long-time overload and instantaneous short-circuit, with the two-stage protection functions of long-time overload and instantaneous short-circuit. It can also be used in cooperation with modules such as leakage protectors, measuring devices, and electric operators. In a low-voltage power distribution system, the molded case circuit breaker is commonly used as a terminal switch or branch switch, replacing the commonly used fuses and knife switches in the past.
[0003] Through research and analysis, it is found that the molded case circuit breakers on the market still have the following disadvantages to a certain extent.
[0004] For example, it cannot clamp and reinforce the wires connected to it. When being dragged, the wires are likely to become detached from the circuit breaker. And when the wire fixing screws are stripped or lost, it cannot play a role in temporarily fixing the connection. It cannot extinguish fires. When the electric control box catches fire, it cannot effectively avoid a large fire. To solve the above technical problems, we have designed a protective structure for a molded case circuit breaker. Content of the Utility Model
[0005] The purpose of the utility model is to provide a protective structure for a molded case circuit breaker, which has the advantages of wire clamping and reinforcement and fire extinguishing, and solves the problems that the wires are likely to become detached from the circuit breaker when being dragged, it cannot play a role in temporarily fixing the connection when the wire fixing screws are stripped or lost, and it cannot extinguish fires and cannot effectively avoid a large fire.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A protective structure for a molded case circuit breaker, including a circuit breaker body. Anti-disconnection mechanisms are installed on both the top and bottom of the circuit breaker body. A fire extinguishing mechanism is installed on the right side of the circuit breaker body. A limiting mechanism is installed on the back of the circuit breaker body;
[0007] The anti-disconnection mechanism includes a fixed block, a first clamp plate, a vertical block, a lead screw, a second clamp plate, a turntable, a guide rod, and a convex strip. The fire extinguishing mechanism includes a fire extinguishing cylinder, a cylinder, a rubber column, a square rod, a first spring, a short block, a clamping block, a connecting rope, and a pin.
[0008] Preferably, one end of the fixed block is fixedly connected to the surface of the circuit breaker body, the other end of the fixed block is fixedly connected to one side of the first clamp plate, one end of the vertical block is fixedly connected to the surface of the circuit breaker body, one end of the lead screw is threadedly embedded in the front of the vertical block, the rear end of the lead screw is rotatably connected to the front of the second clamp plate through a bearing, and the front end of the lead screw is fixedly connected to the back of the turntable.
[0009] Preferably, one end of the guide rod slidably penetrates through the front surface of the vertical block, the rear end of the guide rod is fixedly connected to the front surface of the second clamping plate, the convex strips are respectively fixedly connected to the inner walls of the first clamping plate and the second clamping plate, and a cross groove is formed in the front surface of the turntable.
[0010] Preferably, the upper end of the fire extinguishing cylinder is communicated with the bottom of the cylinder, one end of the square rod slidably penetrates through the front surface of the cylinder, the rear end of the square rod extends into the inner cavity of the cylinder and is fixedly connected to the front end of the rubber column, the first spring is movably sleeved on the surface of the rear end of the square rod, and the two ends of the first spring are respectively fixedly connected to the front end of the rubber column and the front surface of the inner cavity of the cylinder. The left side of the short block is fixedly connected to the front side of the right side of the circuit breaker body, and the clamping block is movably inserted into the front surface of the short block.
[0011] Preferably, the two ends of the connecting rope are respectively fixedly connected to the back surface of the clamping block and the front end of the square rod, the plug pin is movably inserted into the top of the square rod, a clamping hoop is sleeved on the surface of the fire extinguishing cylinder, the left side of the clamping hoop is fixedly connected to the right side of the circuit breaker body, a support block is fixedly connected to the bottom of the right side of the circuit breaker body, and air holes are formed in the surfaces of the cylinder and the rubber column.
[0012] Preferably, the limiting mechanism includes a connecting block, the front side of the top of the connecting block is fixedly connected to the rear side of the bottom of the circuit breaker body, an L-shaped plate slidably penetrates through the rear side of the top of the connecting block, a second spring is fixedly connected to the surface of the L-shaped plate, the upper end of the second spring is fixedly connected to the bottom of the connecting block, a connecting plate is fixedly connected to the surface of the upper end of the L-shaped plate, and a dial plate is fixedly connected to the surface of the front end of the L-shaped plate.
[0013] Preferably, an identification sticker is adhered to the front surface of the circuit breaker body, and the connecting rope is a rope that is easily broken at high temperature.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0015] 1. After connecting the wire to the circuit breaker body, the present invention rotates the turntable to make the lead screw rotate and move. Under the guiding and limiting action of the guide rod, the second clamping plate moves backward. Furthermore, under the action of the convex strips on the first clamping plate and the second clamping plate, it is in close contact with the wire, so that it has the advantage of being able to clamp and reinforce the wire, effectively avoiding the wire being dragged away from the circuit breaker body, and can play a temporary fixing role when the wire fixing screw on the circuit breaker body slips or is lost, improving the usage environment requirements of the circuit breaker.
[0016] 2. When in use, the utility model removes the bolt from the square rod. When the electric control box catches fire, the high temperature of the flame burns and breaks the connecting rope. Under the action of the spring's resilience, the rubber column and the square rod move, aligning the air holes on the cylinder with the air holes on the rubber column. The fire extinguishing material in the fire extinguishing cylinder is discharged from the air holes, thus having the advantage of being able to extinguish fires and effectively avoiding large-scale fires. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a three-dimensional structural schematic diagram of the utility model;
[0018] Figure 2 is a bottom three-dimensional schematic diagram of the utility model;
[0019] Figure 3 is the utility model Figure 1 an enlarged schematic diagram of A in;
[0020] Figure 4 is the utility model Figure 2 an enlarged schematic diagram of B in.
[0021] In the figure: 1, circuit breaker main body; 2, anti-detachment mechanism; 21, fixed block; 22, clamping plate one; 23, vertical block; 24, lead screw; 25, clamping plate two; 26, turntable; 27, guide rod; 28, convex strip; 3, fire extinguishing mechanism; 31, fire extinguishing cylinder; 32, cylinder; 33, rubber column; 34, square rod; 35, spring one; 36, short block; 37, clamping block; 38, connecting rope; 39, bolt; 310, clamp; 311, support block; 4, limit mechanism; 41, connecting block; 42, L-shaped plate; 43, spring two; 44, connecting plate; 45, dial; 5, identification label. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Please refer to Figures 1 - 4 , a protective structure for a molded case circuit breaker, including a circuit breaker main body 1. Anti-detachment mechanisms 2 are installed at both the top and bottom of the circuit breaker main body 1. A fire extinguishing mechanism 3 is installed on the right side of the circuit breaker main body 1. A limit mechanism 4 is installed on the back of the circuit breaker main body 1;
[0023] The anti-detachment mechanism 2 includes a fixed block 21, a clamping plate one 22, a vertical block 23, a lead screw 24, a clamping plate two 25, a turntable 26, a guide rod 27, and a convex strip 28. The fire extinguishing mechanism 3 includes a fire extinguishing cylinder 31, a cylinder 32, a rubber column 33, a square rod 34, a spring one 35, a short block 36, a clamping block 37, a connecting rope 38, and a bolt 39.
[0024] Please refer to Figure 1 and Figure 3, one end of the fixed block 21 is fixedly connected to the surface of the circuit breaker body 1, the other end of the fixed block 21 is fixedly connected to one side of the first clamping plate 22, one end of the vertical block 23 is fixedly connected to the surface of the circuit breaker body 1, one end of the lead screw 24 is threadedly embedded in the front of the vertical block 23, and the rear end of the lead screw 24 is rotatably connected to the front of the second clamping plate 25 through a bearing. By setting the lead screw 24, rotating it can move on the vertical block 23, and the front end of the lead screw 24 is fixedly connected to the back of the turntable 26.
[0025] Please refer to Figure 1 and Figure 3 , one end of the guide rod 27 slidably penetrates the front of the vertical block 23. By setting the guide rod 27, it guides and limits the second clamping plate 25 so that it will not rotate during movement. The rear end of the guide rod 27 is fixedly connected to the front of the second clamping plate 25. The convex strips 28 are respectively fixedly connected to the inner walls of the first clamping plate 22 and the second clamping plate 25. By setting the convex strips 28, the first clamping plate 22 and the second clamping plate 25 are more firmly clamped and reinforced for the wire. A cross groove is provided on the front of the turntable 26. By setting the cross groove, when it is inconvenient to manually rotate the turntable 26, it can be rotated by a screwdriver.
[0026] Please refer to Figure 2 and Figure 4 , the upper end of the fire extinguishing cylinder 31 is communicated with the bottom of the cylinder 32. One end of the square rod 34 slidably penetrates the front of the cylinder 32, and the rear end of the square rod 34 extends into the inner cavity of the cylinder 32 and is fixedly connected to the front end of the rubber column 33. By setting the square rod 34, it guides and limits the rubber column 33 so that the air holes on the cylinder 32 can be aligned with the air holes on the rubber column 33 when the rubber column 33 retracts. The first spring 35 is movably sleeved on the surface of the rear end of the square rod 34. By setting the first spring 35, when the connecting rope 38 is disconnected, it makes the rubber column 33 move under the action of its elastic force. The two ends of the first spring 35 are respectively fixedly connected to the front end of the rubber column 33 and the front of the inner cavity of the cylinder 32. The left side of the short block 36 is fixedly connected to the front side of the right side of the circuit breaker body 1. The clamping block 37 is movably inserted into the front of the short block 36. By setting the clamping block 37, it is convenient to be inserted on the short block 36 during installation to keep the connecting rope 38 taut.
[0027] Please refer to Figure 2 and Figure 4 , the two ends of the connecting rope 38 are respectively fixedly connected to the back of the clamping block 37 and the front end of the square rod 34. The pin 39 is movably inserted into the top of the square rod 34. A clamp 310 is sleeved on the surface of the fire extinguishing cylinder 31. The left side of the clamp 310 is fixedly connected to the right side of the circuit breaker body 1. A support block 311 is fixedly connected to the bottom of the right side of the circuit breaker body 1. By setting the clamp 310 and the support block 311, it limits and supports the installation of the fire extinguishing cylinder 31 and is convenient to remove at the same time. Air holes are provided on the surfaces of the cylinder 32 and the rubber column 33.
[0028] Please refer to Figure 2 , the limiting mechanism 4 includes a connecting block 41. The front side of the top of the connecting block 41 is fixedly connected to the rear side of the bottom of the circuit breaker body 1. The rear side of the top of the connecting block 41 is slidably penetrated with an L-shaped plate 42. A second spring 43 is fixedly connected to the surface of the L-shaped plate 42. By setting the second spring 43, when the dial plate 45 is toggled, the L-shaped plate 42 and the connecting plate 44 move downward, and then it is stretched. The rear side of the circuit breaker body 1 is buckled on the electric control box mounting bracket. Then, the dial plate 45 is released. Under the action of the rebound of the second spring 43, the L-shaped plate 42, the dial plate 45 and the connecting plate 44 return to their positions. The upper end of the L-shaped plate 42 is placed on the back of the mounting bracket, thereby limiting the circuit breaker body 1. The upper end of the second spring 43 is fixedly connected to the bottom of the connecting block 41. A connecting plate 44 is fixedly connected to the surface of the upper end of the L-shaped plate 42. A dial plate 45 is fixedly connected to the surface of the front end of the L-shaped plate 42.
[0029] Please refer to Figure 1 , an identification sticker 5 is adhered to the front surface of the circuit breaker body 1. By setting the identification sticker 5, the wires connected to the circuit breaker body 1 can be written and marked. The connecting rope 38 is a rope that is prone to breakage at high temperatures.
[0030] During use, after connecting the wire to the circuit breaker body 1, rotate the turntable 26 to make the lead screw 24 rotate and move. Under the guiding and limiting action of the guide rod 27, the second clamping plate 25 moves backward. Then, under the action of the protrusions 28 on the first clamping plate 22 and the second clamping plate 25, it is in close contact with the wire, and the wire can be clamped and reinforced, effectively preventing the wire from being dragged away from the circuit breaker body 1. And when the wire fixing screw on the circuit breaker body 1 slips or is lost, it can play a role in temporary fixation, improving the usage environment requirements of the circuit breaker. By removing the plug pin 39 from the square rod 34 during use, when the electric control box catches fire, the high temperature of the flame burns the connecting rope 38. Under the action of the rebound of the first spring 35, the rubber column 33 and the square rod 34 move, aligning the air holes on the cylinder 32 with the air holes on the rubber column 33. The fire extinguishing material in the fire extinguishing cylinder 31 is discharged from the air holes, and the fire can be extinguished, effectively preventing a large fire from occurring.
[0031] In summary: The protective structure of this molded case circuit breaker, through the cooperation of the anti-disconnection mechanism 2 and the fire extinguishing mechanism 3, solves the problems that the wire is prone to detachment from the circuit breaker when being dragged, there is no function of temporarily fixing and connecting when the wire fixing screw slips or is lost, and it is impossible to extinguish the fire and effectively prevent a large fire from occurring.
Claims
1. A protective structure for a molded case circuit breaker, comprising a circuit breaker body (1), characterized in that: The top and bottom of the circuit breaker body (1) are both equipped with anti-dropping mechanisms (2), the right side of the circuit breaker body (1) is equipped with a fire extinguishing mechanism (3), and the back side of the circuit breaker body (1) is equipped with a limiting mechanism (4); The anti-drop mechanism (2) comprises a fixing block (21), a clamping plate (22), a vertical block (23), a screw rod (24), a clamping plate (25), a rotating disk (26), a guide rod (27) and a convex strip (28); the fire extinguishing mechanism (3) comprises a fire extinguishing cylinder (31), a cylinder (32), a rubber column (33), a square rod (34), a spring (35), a short block (36), a clamping block (37), a connecting rope (38) and a latch (39).
2. A protective structure for a molded case circuit breaker according to claim 1, characterized in that: One end of the fixed block (21) is fixedly connected to the surface of the circuit breaker body (1), the other end of the fixed block (21) is fixedly connected to one side of the clamping plate (22), one end of the vertical block (23) is fixedly connected to the surface of the circuit breaker body (1), one end of the screw rod (24) is threadedly embedded in the front face of the vertical block (23), the rear end of the screw rod (24) is rotatably connected to the front face of the clamping plate (25) via a bearing, and the front end of the screw rod (24) is fixedly connected to the back face of the turntable (26).
3. The protective structure of a molded case circuit breaker according to claim 1, characterized in that: One end of the guide rod (27) slides through the front surface of the vertical block (23), the rear end of the guide rod (27) is fixedly connected to the front surface of the second clamping plate (25), the convex strip (28) is respectively fixedly connected to the inner wall of the first clamping plate (22) and the second clamping plate (25), and a cross groove is provided on the front surface of the rotating disk (26).
4. The protective structure of a molded case circuit breaker according to claim 1, characterized in that: The upper end of the fire extinguishing cylinder (31) is connected to the bottom of the cylinder (32), one end of the square rod (34) slides through the front side of the cylinder (32), the rear end of the square rod (34) extends to the inner cavity of the cylinder (32) and is fixedly connected to the front end of the rubber column (33), the spring (35) is movably sleeved on the surface of the rear end of the square rod (34), the two ends of the spring (35) are respectively fixedly connected to the front end of the rubber column (33) and the front side of the inner cavity of the cylinder (32), the left side of the short block (36) is fixedly connected to the front side of the right side of the circuit breaker body (1), and the clamping block (37) is movably plugged into the front side of the short block (36).
5. The protective structure of a molded case circuit breaker according to claim 1, characterized in that: The two ends of the connecting rope (38) are respectively fixedly connected to the back of the clamping block (37) and the front end of the square rod (34); the latch (39) is movably plugged into the top of the square rod (34); a clamp (310) is sleeved on the surface of the fire extinguishing cylinder (31); the left side of the clamp (310) is fixedly connected to the right side of the circuit breaker body (1); a support block (311) is fixedly connected to the bottom of the right side of the circuit breaker body (1); and air holes are provided on the surfaces of the cylinder (32) and the rubber column (33).
6. The protective structure of a molded case circuit breaker according to claim 1, characterized in that: The limiting mechanism (4) comprises a connecting block (41), the front side of the top of the connecting block (41) is fixedly connected to the rear side of the bottom of the circuit breaker body (1), an L-shaped plate (42) is slidably penetrated through the rear side of the top of the connecting block (41), a second spring (43) is fixedly connected to the surface of the L-shaped plate (42), the upper end of the second spring (43) is fixedly connected to the bottom of the connecting block (41), a connecting plate (44) is fixedly connected to the surface of the upper end of the L-shaped plate (42), and a shifting plate (45) is fixedly connected to the surface of the front end of the L-shaped plate (42).
7. The protective structure of a molded case circuit breaker according to claim 1, characterized in that: The front surface of the circuit breaker body (1) is bonded with an identification sticker (5), and the connecting rope (38) is a high-temperature easily disconnectable rope.