A safety circuit breaker

Abstract

The utility model discloses a safe circuit breaker relates to circuit breaker technical field, including circuit breaker protection shell, circuit connection and protection subassembly, linkage subassembly and wire fixing assembly, the inside installation of circuit breaker protection shell has circuit connection and protection subassembly, linkage subassembly and wire fixing assembly of circuit breaker protection shell, circuit connection and protection subassembly: contain insulating seal pipe, one -way backflow pipe, insulating gas storage jar and multichannel electromagnetic valve, the inside middle part fixed connection of circuit breaker protection shell has three insulating seal pipes, the inside front end of circuit breaker protection shell is provided with insulating gas storage jar, the gas outlet of insulating gas storage jar is linked with the gas inlet of multichannel electromagnetic valve, the gas outlet of insulating gas storage jar is linked with insulating seal pipe, and this safe circuit breaker can be recycled after circuit breaker protection device is disconnected, and the whole contact is in the inside of airtight insulation space, guarantees the security when opening and closing.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically a safety circuit breaker. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and close, carry, and interrupt current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy, infrequently start asynchronous motors, protect power lines and motors, and automatically disconnect the circuit when they experience serious overload, short circuit, or undervoltage faults. Its function is equivalent to a combination of a fuse switch and an over / under-temperature relay.

[0003] Among the existing technologies, the safety circuit breaker proposed in the authorization announcement number CN119340170A includes: a circuit breaker, the circuit breaker including a control mechanism, the control mechanism including a drive module, a closing module, a tripping module, an incoming power terminal, an outgoing power terminal and a position sensor;

[0004] In existing technologies, traditional circuit breakers typically use fuses to disconnect when the current is large and the circuit heats up. The fuses need to be replaced for reuse, so they cannot be reused. At the same time, electric arcs are generated between the circuit breaker contacts and exposed inside the circuit breaker, which can easily cause damage to the circuit breaker. Therefore, we propose a safety-type circuit breaker. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a safety circuit breaker that can be reused after the circuit breaker protection device is disconnected. The entire contact is inside a sealed and insulated space, which ensures safety when opening and closing the circuit breaker and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety circuit breaker, comprising a circuit breaker protective shell, circuit connection and protection components, linkage components, and wire fixing components;

[0007] Circuit breaker protective housing: The inner side of the circuit breaker protective housing is equipped with circuit connection and protection components, linkage components and wire fixing components;

[0008] Circuit connection and protection components: including an insulating sealing tube, a one-way return tube, an insulating gas storage tank, and a multi-way solenoid valve. Three insulating sealing tubes are fixedly connected to the inner middle of the circuit breaker protective shell. An insulating gas storage tank is provided at the inner front end of the circuit breaker protective shell. The outlet of the insulating gas storage tank is connected to the inlet of the multi-way solenoid valve. The outlet of the insulating gas storage tank is connected to the insulating sealing tube. The upper outer end of the insulating sealing tube is connected to one end of the one-way return tube. The other end of the one-way return tube is connected to the insulating gas storage tank. A temperature detector is embedded inside the insulating sealing tube.

[0009] The insulating sealing tube inside the circuit breaker's protective casing serves as an arc-extinguishing unit. An insulating gas storage tank supplies sulfur hexafluoride to the sealing tube via a multi-way solenoid valve. A one-way return pipe enables gas circulation. A temperature detector monitors the tube's status in real time. Under load, insulating gas is injected through the multi-way solenoid valve to enhance insulation strength.

[0010] Furthermore, the circuit connection and protection assembly also includes a fixed terminal, a moving terminal, and a sliding plug. The fixed terminal is provided at the upper inner end of the insulating sealing tube, the moving terminal is slidably connected to the inner lower end of the insulating sealing tube, and the sliding plug is provided at the upper outer side of the moving terminal. The sliding plug is slidably connected to the insulating sealing tube.

[0011] The fixed terminal is fixed to the top of the sealed tube as a static contact, and the moving terminal slides up and down inside the tube through a sliding plug to form a moving contact. The temperature detector monitors the tube status in real time. In case of overload, insulating gas is injected through a multi-way solenoid valve. The gas quickly pushes the sliding plug, causing the contact to break. When the contact separates, the insulating gas quickly fills the arc path.

[0012] Furthermore, the circuit connection and protection assembly also includes a sealing tube, a wire, and a connecting ring. The lower inner end of the insulating sealing tube is fixedly connected to the connecting ring, which is slidably connected to the moving terminal. A sealing tube is provided at the rear end of the insulating sealing tube, and a wire is provided inside the sealing tube. The lower end of the wire passes through the insulating sealing tube and is fixedly connected to the connecting ring.

[0013] The connecting ring acts as a conductive medium for the moving terminal, the sealed tube protects the insulation of the wire as it passes through the tube wall, the flexible wire compensates for the displacement of the moving terminal, and the sliding contact of the connecting ring ensures the continuity of conductivity.

[0014] Furthermore, the linkage assembly includes a connecting plate, a telescopic rod, and a spring. The telescopic rod is provided in the middle of the upper inner side of the circuit breaker protective shell. The upper end of the telescopic rod is fixedly connected to the connecting plate. The upper end of the connecting plate is fixedly connected to three moving terminals. A spring is sleeved on the outer side of the telescopic rod.

[0015] The telescopic rod synchronously controls the moving terminal through the connecting plate. The spring provides the pressure for closing the circuit. When the power is lost, the pressure of the insulating gas inside the insulating tube is greater than the spring force, causing the spring force to compress and push the contacts to separate.

[0016] Furthermore, the linkage assembly also includes a rack, a limiting post, and an opening / closing handle. A limiting post is provided on the inner front of the circuit breaker protective housing, and an opening / closing handle is rotatably connected to the outer side of the limiting post. A rack is provided at the front end of the connecting plate, and the opening / closing handle meshes with the rack.

[0017] The manual operation of the opening and closing handle is connected to the rack and pinion transmission plate, and the limit post limits the rotation. The gear and rack convert the rotational motion into linear motion to realize mechanical opening control. When closing, the insulating gas inside the tube flows back into the storage chamber through the one-way return tube. At this time, the pressure of the insulating sealing tube is less than the spring force.

[0018] Furthermore, the conductor fixing assembly includes a mounting cavity, a first connecting piece, a second connecting piece, an insulating fixing bolt, a pressure plate, and a connecting hole. The upper inner side of the circuit breaker protective shell has six mounting cavities, and the upper end of each mounting cavity has a connecting hole. A pressure plate is slidably connected to the front end of the inner side of each mounting cavity, and an insulating fixing bolt is threadedly connected to the front end of each mounting cavity. The rear end of the insulating fixing bolt is rotatably connected to the pressure plate. The rear end of the inner side of three mounting cavities is provided with a first connecting piece, and the other three inner sides are provided with a second connecting piece. The upper end of the connecting ring is fixedly connected to the second connecting piece, and the upper end of the fixed terminal is fixedly connected to the first connecting piece.

[0019] The first connecting piece connects to the fixed terminal inlet wire, and the second connecting piece connects to the moving terminal outlet wire. The rotating insulating bolt drives the pressure plate to clamp the wire, and the bolt-driven pressure plate forms a self-locking terminal. The connecting hole guides the wire positioning. The tool-free wiring design improves efficiency, and double insulation ensures operational safety.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This safety circuit breaker has the following advantages:

[0021] 1. This safety-type circuit breaker establishes a closed-loop pressure regulation mechanism through the linkage control of the insulating gas storage tank and the multi-way solenoid valve. Under overload conditions, the insulating gas is injected into the sealed tube in a controlled manner to form a high-speed airflow, which synchronously pushes the sliding plug to achieve contact separation. When closing, the gas is automatically recycled through the one-way return pipe. With the help of the temperature detector, the tube status is fed back in real time to ensure that the insulating medium dynamically adapts to the fault level, which greatly improves the breaking reliability and medium utilization rate, so that the circuit breaker protection device can be reused after disconnection.

[0022] 2. This safety-type circuit breaker can quickly inject insulating gas when the contacts separate, instantly filling the arc channel and suppressing ion diffusion, thus achieving rapid and safe arc extinguishing operation and ensuring safety during use. The entire contact is inside a sealed and insulated space, ensuring safety during opening and closing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0025] Figure 3 This is a cross-sectional view of the internal structure of this utility model.

[0026] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0027] In the diagram: 1 Circuit breaker protective casing, 3 Circuit connection and protection components, 31 Insulating sealing tube, 32 One-way return tube, 33 Insulating gas storage tank, 34 Multi-way solenoid valve, 35 Fixed terminal, 36 Moving terminal, 37 Sliding plug, 38 Sealing tube, 39 Wire, 310 Connecting ring, 4 Linkage assembly, 41 Connecting plate, 42 Telescopic rod, 43 Spring, 44 Rack, 45 Limiting post, 46 Opening and closing handle, 5 Wire fixing assembly, 51 Mounting cavity, 52 First connecting piece, 53 Second connecting piece, 54 Insulating fixing bolt, 55 Pressure plate, 56 Connecting hole. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-4 This embodiment provides a technical solution: a safety circuit breaker, including a circuit breaker protective shell 1, a circuit connection and protection component 3, a linkage component 4, and a wire fixing component 5;

[0030] Circuit breaker protective housing 1: Circuit connection and protection components 3, linkage components 4 and wire fixing components 5 are installed inside the circuit breaker protective housing 1;

[0031] Circuit connection and protection component 3: includes an insulating sealing tube 31, a one-way return tube 32, an insulating gas storage tank 33, and a multi-way solenoid valve 34. Three insulating sealing tubes 31 are fixedly connected to the middle of the inner side of the circuit breaker protective shell 1. An insulating gas storage tank 33 is provided at the front end of the inner side of the circuit breaker protective shell 1. The outlet of the insulating gas storage tank 33 is connected to the inlet of the multi-way solenoid valve 34. The outlet of the insulating gas storage tank 33 is connected to the insulating sealing tube 31. The upper outer side of the insulating sealing tube 31 is connected to one end of the one-way return tube 32. The other end of the one-way return tube 32 is connected to the insulating gas storage tank 33. A temperature detector is embedded in the inner side of the insulating sealing tube 31.

[0032] The insulating sealing tube 31 inside the circuit breaker protective casing 1 serves as an arc extinguishing unit. The insulating gas storage tank 33 delivers sulfur hexafluoride to the sealing tube through the multi-way solenoid valve 34. The one-way return pipe 32 realizes gas circulation. The temperature detector monitors the tube status in real time. When under load, the insulating gas is injected through the multi-way solenoid valve 34 to enhance the insulation strength.

[0033] The circuit connection and protection component 3 also includes a fixed terminal 35, a moving terminal 36 and a sliding plug 37. The fixed terminal 35 is provided on the upper inner side of the insulating sealing tube 31, the moving terminal 36 is slidably connected to the inner lower end of the insulating sealing tube 31, and the sliding plug 37 is provided on the upper outer side of the moving terminal 36. The sliding plug 37 is slidably connected to the insulating sealing tube 31.

[0034] The fixed terminal 35 is fixed to the top of the sealed tube as a static contact, and the moving terminal 36 slides up and down inside the tube through the sliding plug 37 to form a moving contact. The temperature detector monitors the tube status in real time. When overloaded, insulating gas is injected through the multi-way solenoid valve 34. The gas quickly pushes the sliding plug 37, causing the contact to break. When the contact is separated, the insulating gas quickly fills the arc path.

[0035] The circuit connection and protection component 3 also includes a sealing tube 38, a wire 39 and a connecting ring 310. The connecting ring 310 is fixedly connected to the lower inner end of the insulating sealing tube 31. The connecting ring 310 is slidably connected to the moving terminal 36. The sealing tube 38 is provided at the rear end of the insulating sealing tube 31. The wire 39 is provided inside the sealing tube 38. The lower end of the wire 39 passes through the insulating sealing tube 31 and is fixedly connected to the connecting ring 310.

[0036] The connecting ring 310 serves as a conductive medium for the moving terminal, the sealing tube 38 protects the insulation of the wire 39 when it passes through the tube wall, the flexible wire compensates for the displacement of the moving terminal, and the sliding contact of the connecting ring ensures the continuity of conductivity.

[0037] The linkage assembly 4 includes a connecting plate 41, a telescopic rod 42, and a spring 43. The telescopic rod 42 is provided in the middle of the upper inner side of the circuit breaker protective shell 1. The upper end of the telescopic rod 42 is fixedly connected to the connecting plate 41. The upper end of the connecting plate 41 is fixedly connected to three moving terminals 36. The spring 43 is sleeved on the outer side of the telescopic rod 42.

[0038] The telescopic rod 42 synchronously controls the moving terminal through the connecting plate 41. The spring 43 provides the closing pressure. When the power is lost, the pressure of the insulating gas inside the insulating tube is greater than the spring force, causing the spring force to compress and push the contacts to separate.

[0039] The linkage assembly 4 also includes a rack 44, a limit post 45, and an opening / closing handle 46. The limit post 45 is provided on the inner front of the circuit breaker protective housing 1, and the opening / closing handle 46 is rotatably connected to the outer side of the limit post 45. The rack 44 is provided at the front end of the connecting plate 41, and the opening / closing handle 46 meshes with the rack 44.

[0040] The manual operation handle 46 drives the connecting plate through the rack 44, and the limit post 45 limits the rotation. The gear and rack convert the rotational motion into linear motion to realize mechanical opening control. When closing, the insulating gas inside the tube flows back into the storage chamber through the one-way return tube 32. At this time, the pressure of the insulating sealing tube 31 is less than the spring force.

[0041] The conductor fixing assembly 5 includes a mounting cavity 51, a first connecting piece 52, a second connecting piece 53, an insulating fixing bolt 54, a pressure plate 55, and a connecting hole 56. Six mounting cavities 51 are provided on the upper inner side of the circuit breaker protective shell 1. A connecting hole 56 is provided on the upper end of each mounting cavity 51. A pressure plate 55 is slidably connected to the front end of the inner side of each mounting cavity 51. An insulating fixing bolt 54 is threadedly connected to the front end of each mounting cavity 51. The rear end of the insulating fixing bolt 54 is rotatably connected to the pressure plate 55. The rear end of the inner side of three mounting cavities 51 is provided with a first connecting piece 52, and the inner side of the other three is provided with a second connecting piece 53. The upper end of the connecting ring 310 is fixedly connected to the second connecting piece 53, and the upper end of the fixed terminal 35 is fixedly connected to the first connecting piece 52.

[0042] The first connecting piece 52 connects to the fixed terminal inlet wire, and the second connecting piece 53 connects to the moving terminal outlet wire. The rotating insulating bolt 54 drives the pressure plate 55 to clamp the wire. The bolt-driven pressure plate forms a self-locking terminal block. The connecting hole 56 guides the wire positioning. The tool-free wiring design improves efficiency, and double insulation ensures operational safety.

[0043] The working principle of the safety circuit breaker provided by this utility model is as follows: the conductor 39 conducts to the moving terminal through the connecting ring 310, and the external conductor is inserted into the mounting cavity 51 through the connecting hole 56. The rotating insulating fixing bolt 54 drives the pressure plate 55 to press the conductor, realizing the electrical connection with the fixed terminal connected to the first connecting plate 52 or the moving terminal connected to the second connecting plate 53. In case of overload, the temperature detector in the insulating sealing tube 31 triggers the multi-way solenoid valve 34 to inject the insulating gas from the insulating gas storage tank 33 into the sealing tube. The gas pressure pushes the sliding plug 37. At this time, the insulating gas pressure inside the insulating tube is greater than the spring force, causing the spring force to compress, so that the moving terminal 36 is separated from the fixed terminal 35 and the circuit is cut off. At the same time, the arc is extinguished by the insulating gas. When closing the circuit, the operator manually rotates the opening and closing handle 46 to drive the rack 44, pushes the connecting plate 41 to drive the telescopic rod 42 to compress the spring 43, so that the three moving terminals 36 move up synchronously and contact the fixed terminal 35 to complete the closing. At this time, the insulating gas flows back to the storage tank through the one-way return pipe 32. At this time, the pressure of the insulating sealing tube 31 is less than the spring force.

[0044] It is worth noting that the input terminal of the multi-way solenoid valve 34 disclosed in the above embodiments is electrically connected to the output terminal of an external power supply through an external PLC controller, and the external PLC controller controls the operation of the multi-way solenoid valve 34 using a method commonly used in the prior art.

[0045] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A safety-type circuit breaker, characterized in that: It includes a circuit breaker protective housing (1), a circuit connection and protection assembly (3), an interlocking assembly (4), and a wire fixing assembly (5); Circuit breaker protective housing (1): The circuit breaker protective housing (1) is equipped with circuit connection and protection components (3), linkage components (4) and wire fixing components (5) on its inner side. Circuit connection and protection components (3): including insulating sealing tube (31), one-way return tube (32), insulating gas storage tank (33) and multi-way solenoid valve (34). Three insulating sealing tubes (31) are fixedly connected to the middle of the inner side of the circuit breaker protective shell (1). An insulating gas storage tank (33) is provided at the front end of the inner side of the circuit breaker protective shell (1). The outlet of the insulating gas storage tank (33) is connected to the inlet of the multi-way solenoid valve (34). The outlet of the insulating gas storage tank (33) is connected to the insulating sealing tube (31). The upper outer side of the insulating sealing tube (31) is connected to one end of the one-way return tube (32). The other end of the one-way return tube (32) is connected to the insulating gas storage tank (33). A temperature detector is embedded in the inner side of the insulating sealing tube (31).

2. A safety circuit breaker according to claim 1, characterized in that: The circuit connection and protection assembly (3) further includes a fixed terminal (35), a moving terminal (36) and a sliding plug (37). The fixed terminal (35) is provided on the upper inner side of the insulating sealing tube (31), the moving terminal (36) is slidably connected to the inner lower end of the insulating sealing tube (31), and the sliding plug (37) is provided on the upper outer side of the moving terminal (36). The sliding plug (37) is slidably connected to the insulating sealing tube (31).

3. A safety circuit breaker according to claim 2, characterized in that: The circuit connection and protection assembly (3) also includes a sealing tube (38), a wire (39) and a connecting ring (310). The lower inner end of the insulating sealing tube (31) is fixedly connected to the connecting ring (310). The connecting ring (310) is slidably connected to the moving terminal (36). The rear end of the insulating sealing tube (31) is provided with a sealing tube (38). The inner side of the sealing tube (38) is provided with a wire (39). The lower end of the wire (39) passes through the insulating sealing tube (31) and is fixedly connected to the connecting ring (310).

4. A safety circuit breaker according to claim 1, characterized in that: The linkage assembly (4) includes a connecting plate (41), a telescopic rod (42) and a spring (43). The telescopic rod (42) is provided in the middle of the upper inner side of the circuit breaker protective shell (1). The upper end of the telescopic rod (42) is fixedly connected to the connecting plate (41). The upper end of the connecting plate (41) is fixedly connected to three moving terminals (36). The spring (43) is sleeved on the outer side of the telescopic rod (42).

5. A safety circuit breaker according to claim 4, characterized in that: The linkage assembly (4) also includes a rack (44), a limiting post (45), and an opening and closing handle (46). The circuit breaker protective shell (1) is provided with a limiting post (45) at the front inner side. The opening and closing handle (46) is rotatably connected to the outer side of the limiting post (45). The front end of the connecting plate (41) is provided with a rack (44). The opening and closing handle (46) meshes with the rack (44).

6. A safety circuit breaker according to claim 3, characterized in that: The conductor fixing assembly (5) includes a mounting cavity (51), a first connecting piece (52), a second connecting piece (53), an insulating fixing bolt (54), a pressure plate (55), and a connecting hole (56). The upper inner side of the circuit breaker protective shell (1) is provided with six mounting cavities (51). The upper end of the mounting cavity (51) is provided with a connecting hole (56). The pressure plate (55) is slidably connected to the front end of the inner side of the mounting cavity (51). The front end of the mounting cavity (51) is threadedly connected with an insulating fixing bolt (54). The rear end of the insulating fixing bolt (54) is rotatably connected to the pressure plate (55). The rear end of the inner side of three mounting cavities (51) is provided with a first connecting piece (52), and the other three inner sides are provided with a second connecting piece (53). The upper end of the connecting ring (310) is fixedly connected to the second connecting piece (53), and the upper end of the fixed terminal (35) is fixedly connected to the first connecting piece (52).

Images