Split type circuit breaker

Abstract

The invention relates to the technical field of circuit breaker switches, in particular to a split circuit breaker switch which comprises a main shell, a static contact piece, a split shell, a telescopic column, a wiring hole, a bolt hole, a wiring bolt, a wiring terminal assembly, a first spring, a locking assembly and a double-layer metal piece. Through the synergistic effect of the wiring terminal assembly, the locking assembly, the trigger rod and the locking assembly, the circuit is automatically disconnected when the temperature is too high, the split part and the main body part are separated, damage is prevented from being further increased, fire hazards are prevented from being caused, and therefore the safety performance and reliability of the circuit breaker are improved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, in particular to a split type circuit breaker. Background Art

[0002] A circuit breaker is an important device used for control and protection in power systems. It can connect, carry and disconnect current under normal circuit conditions, and can quickly cut off the circuit under abnormal circuit conditions, such as short circuit or overload, to protect the safety of circuits and electrical equipment.

[0003] The split circuit breaker includes all the functions of a conventional circuit breaker, and compared with a conventional short-circuit switch, the split circuit breaker adopts a split design to achieve functions that a conventional circuit breaker cannot achieve. It can be used for easy disassembly and assembly, safety protection, and integration of different functions.

[0004] However, in practice, the phenomenon of wires burning red often occurs, which is usually related to the current exceeding the load and the increase of wire resistance. In addition, the circuit breaker may fail to trip in time due to improper overload protection settings, quality problems, high ambient temperature or abnormal current waveform, resulting in protection failure. Conventional circuit breakers are generally unable to detect and trip protection due to heat or even burning caused by virtual connection, which poses a great safety hazard for daily use, especially in industrial use. In addition, for circuit breakers used in industry, vibrations are easily generated due to instrument processing during use, which increases the virtual connection of the circuit breaker. There are many reasons for the circuit breaker to burn red, which increases the difficulty of regular inspection and maintenance. It is impossible to completely avoid the burning and damage of wires. If no protective measures are taken, the circuit breaker line will be paralyzed when it burns red or even damaged, affecting normal operation and causing unavoidable economic losses.

[0005] Therefore, in order to prevent the circuit breaker from burning red and causing line damage or causing greater safety hazards, a split circuit breaker is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a split type circuit breaker, which can solve the problem that the circuit of the circuit breaker sometimes burns red or even gets damaged due to various reasons when the circuit breaker is in use, and it is impossible to completely avoid it. The circuit is automatically disconnected when the temperature is too high through the terminal assembly, the locking assembly, the trigger rod and the locking assembly, and the split part is separated from the main part to prevent further damage and fire hazard.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A split type circuit breaker, comprising a main body, and two groups of split parts respectively connected to the top and bottom of the main body; wherein the main body comprises a main housing, and a static contact sheet connected to the main housing; the split part comprises a split housing connected to the main housing through a telescopic column, a wiring hole and a bolt hole provided on the split housing, a wiring bolt connected to the bolt hole, a wiring terminal assembly threadedly connected to the wiring bolt, two groups of first springs connected to the split housing, two groups of locking assemblies respectively connected to the two groups of first springs, and a double-layer metal sheet with two ends connected to the locking assemblies;

[0009] The static contact piece is located between the two ends of the terminal assembly, the cable passes through the wiring hole and is located between the static contact piece and the terminal assembly, and the double-layer metal sheet can be slightly closer to one side of the cable relative to the static contact piece. When the double-layer metal sheet is heated, both ends bend toward the cable side, which increases the sensitivity to temperature changes of the cable, and the bending of both ends of the double-layer metal sheet due to heat drives the locking components and the main shell connected to them on both sides to release the limit.

[0010] It can be seen that most circuit breakers adopt an integrated design. Generally, circuit breakers can provide short-circuit protection and overload protection. They can monitor the current in the line in real time and disconnect the line when short-circuited or overloaded. Combined with the use scenario of this circuit breaker, when the short-circuit switch is working, it cannot provide reasonable protection for the cable, causing the cable to burn red or even cause a fire, but the line will not be disconnected immediately, causing greater losses.

[0011] Preferably, the terminal assembly includes a connecting section, a telescopic section, and a trigger rod; the connecting section is slidably connected to the telescopic section, the connecting bolt is threadedly connected to the connecting section, the trigger rod is slidably connected to the connecting section, and the trigger rod can block the telescopic connection of the connecting section and the telescopic section.

[0012] Preferably, blocking grooves adapted to the trigger rod are also provided on both sides of the telescopic section, and a sliding groove is provided on the trigger rod close to the telescopic section. The telescopic section can move axially relative to the connecting bolt through the sliding groove, and the exposed part of the bottom end of the trigger rod is an arc end face. The trigger rod can be touched by the double-layer metal sheet and slide into the inside of the connecting section. The trigger rod is slidably connected to the bottom of the connecting section, and the telescopic section can slide to move the blocking groove to the trigger rod, and the trigger rod can slide down along the blocking groove.

[0013] In the above scheme, the wiring terminal is driven by the wiring bolt to achieve clamping and fixing of the cable, and the wiring terminal threadedly connected thereto is driven to move laterally by rotating the wiring bolt, so that the telescopic end of the wiring terminal is close to the static contact piece, and the cable is fixed between the telescopic section and the static contact piece. The main body is connected through the static contact piece to realize circuit power-on, wherein the telescopic section is affected by the trigger rod and can be moved to a certain position on the trigger rod, and the telescopic section and the connecting section can produce relative stretching.

[0014] It can be seen that there are many reasons for circuit breaking and disconnection, but most of them are due to certain problems with the current in the line, such as short circuit overload, which will automatically disconnect. The wires are clamped and fixed at the terminal, and the connection will not be completely lost. Combined with the current actual scenario, when the cable is heated and red due to other reasons, the terminal will still remain connected and cannot be disconnected. The setting of the telescopic section can provide unlockable space when an accident occurs to the cable, so that the telescopic section can be stretched to a certain extent, so that the cable can disconnect itself.

[0015] Preferably, the main shell includes a placement groove arranged on the top thereof, and two sets of arc-shaped limit grooves arranged on the top of the main shell, the static contact piece is passed through the placement groove, and the locking assembly can be snap-connected with the arc-shaped limit groove.

[0016] In the above scheme, the static contact piece is placed in the placement groove to realize the connection of the wires between the main parts. Since the overall circuit breaker adopts a split setting, it is necessary to ensure that the line can be connected when the circuit breaker is in normal working state, so that the split part as a whole can be kept close to the main part, and the circuit breaker can maintain conductive stability through the arc limit groove and locking assembly.

[0017] Preferably, the locking assembly includes an extension rod connected to the double-layer metal sheet, and a locking buckle arranged at the bottom of the extension rod. The length of the extension rod is proportional to the angle of bending and rotation of the double-layer metal sheet when heated. The bottom of the locking buckle is an arc surface and the top is a horizontal plane.

[0018] In the above scheme, the double-layer metal sheet is tightly attached to the cable after wiring, and bends when the double-layer metal sheet is heated to too high a temperature. The extension rods connected at both ends of the double-layer metal sheet deflect simultaneously along the connection. Due to the connection position, the longer the extension rod, the smaller the deflection angle of the bottom locking buckle position.

[0019] It can be seen that the locking between the split part and the main part is mainly triggered and activated by the locking assembly and the double-layer metal sheet. Combined with the usage scenario, the bending angle of the double-layer metal sheet when heated will easily excessively affect the extension rod. In order to ensure that the split part can be separated from the main part when the required control temperature is reached, the length of the extension rod is proportional to the angle of bending and rotation of the double-layer metal sheet when heated to assist in controlling the unlocking timing.

[0020] Preferably, the split shell includes a first fixing plate arranged at the bottom thereof close to the wiring bolt side, a second fixing plate arranged at the split shell and located on the side opposite to the first fixing plate, an anti-touch plate connected to one side of the wiring hole, a bolt blocking plate arranged at the bottom of the anti-touch plate, and a spring support plate fixedly connected to the top of the second fixing plate, and the bolt blocking plate is in close contact with the wiring bolt.

[0021] Preferably, the two ends of the two groups of first springs are respectively connected to the spring support plate and the extension rod, the first springs are fixedly connected to the spring support plate, and the first springs are rotatably connected to one end of the extension rod close to the double-layer metal sheet.

[0022] It can be seen that the burnt damage of the cable may be caused by the loose connection of the cable. Most of the reasons for the loose connection of the cable are due to the vibration generated by industrial production, which causes the cable to become loose to a certain extent, thereby causing the conductive cold connection of the cable. The first spring is connected to the extension rod so that the extension rod can be in the space of the arc-shaped limit groove and produce a displacement in the direction of the cable. While the terminal is fixed to the static contact piece, an additional lateral auxiliary clamping elastic force is applied by the first spring to offset part of the force of the cable moving due to vibration and further maintain the stability of the cable.

[0023] Preferably, the arc-shaped limit groove includes a right-angle segment and an arc surface segment, and the arc length of the arc surface segment is proportional to the length of the extension rod, that is, the arc length of the arc surface segment is proportional to the angle of bending and rotation of the double-layer metal sheet when heated, and the locking buckle can release the limit between the arc surface segment and the arc limit groove.

[0024] In the above scheme, the arc-shaped limit groove is divided into a right-angle section and an arc surface section. When it is in the right-angle section, it means that the double-layer metal sheet has not yet been fully heated to drive the extension rod, which can better prevent the influence of vibration on the cable. When the locking buckle at the bottom of the extension rod is in the arc surface section, it means that the double-layer metal sheet has undergone a certain degree of heat bending, thereby causing the extension rod to move slowly along the arc-shaped limit groove until the locking buckle and the arc-shaped limit groove are released, thereby warning that the cable has undetectable overheating and needs to be disconnected in time to ensure line safety.

[0025] Preferably, the static contact piece is L-shaped, and is located on the side of the bolt barrier plate away from the connection bolt. An arc bending area is provided at the bending part of the static contact piece, and the height of the arc bending area is greater than the height of the double-layer metal sheet.

[0026] Preferably, the height difference between the second fixing plate and the terminal assembly is the same as the height of the double-layer metal sheet.

[0027] In the above scheme, if the cable is overheated, the double-layer metal sheet will bend between the second fixed plate and the terminal assembly. The double-layer metal sheet and the second fixed plate are at the same height as the terminal assembly. When the double-layer metal sheet is bent by heat, the upper and lower ends will be close to the terminal assembly and the second fixed plate respectively. When the telescopic section is unlocked, the double-layer metal sheet is kept in lateral displacement under the tension of the first spring and is not easily deflected, thereby ensuring that the cable is disconnected.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. Existing circuit breakers generally have problems such as improper overload protection settings, quality problems, and failure to trip in time when the ambient temperature is too high or the current waveform is abnormal, resulting in protection failure and great safety hazards. The present invention automatically disconnects the line when the temperature is too high and separates the split part from the main part through the cooperation between the terminal assembly, the locking assembly, the trigger rod and the locking assembly to prevent further damage and fire hazards, thereby improving the safety performance and reliability of the circuit breaker.

[0030] 2. The split-type circuit breaker of the present invention reduces the impact of loose cables due to mechanical vibration in industrial environments by cooperating between the double-layer metal plate and the locking assembly. The two ends of the spring are respectively connected to the spring support plate and the extension rod. The elastic force of the spring provides the cable with additional lateral clamping force beyond the normal clamping of the terminal, thereby enhancing the tightness between the cable and the terminal and effectively offsetting the cable movement caused by industrial mechanical vibration, thereby reducing the safety hazards caused by virtual connection of the cable.

[0031] 3. When the temperature rises, the double-layer metal sheet of the present invention will gradually increase the contact area with the cable, thereby improving the sensitivity to the cable temperature. When the ambient temperature or the cable temperature rises abnormally, the double-layer metal sheet will bend due to the principle of thermal expansion and contraction, and the temperature sensitivity will be greater at higher temperatures, which makes it easier to drive the locking component to produce corresponding deflection, thereby triggering the disconnection of the wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the split type circuit breaker;

[0033] Figure 2 It is a schematic diagram of the overall split structure of the split type circuit breaker;

[0034] Figure 3 It is a schematic diagram of the internal structure of the split parts of the split type circuit breaker;

[0035] Figure 4 It is a top view schematic diagram of the internal structure of the split parts of the split type circuit breaker;

[0036] Figure 5 It is a schematic cross-sectional view of the split component structure of a split type circuit breaker;

[0037] Figure 6 It is an enlarged schematic diagram of the arc-shaped limit groove structure of the split-type circuit breaker;

[0038] Figure 7 It is an enlarged schematic diagram of the structure process of the locking assembly of the split type circuit breaker;

[0039] Figure 8It is a schematic diagram of the locking assembly structure of a split type circuit breaker;

[0040] Fig. 9 It is a schematic diagram of the internal structure of the terminal block assembly of the split type circuit breaker;

[0041] Fig.10 The figure is a schematic diagram of the process flow of the terminal assembly of the split type circuit breaker.

[0042] In the figure: 100, main body; 101, main housing; 101a, placement groove; 101b, arc-shaped limit groove; 101b-1, right-angle section; 101b-2, arc section; 102, static contact piece; 102a, arc bending area; 200, split member; 201, split housing; 201a, first fixing plate; 201b, second fixing plate; 201c, anti-touch plate; 201d, bolt blocking plate; 201e, Spring support plate; 202, telescopic column; 203, wiring hole; 204, bolt hole; 205, wiring bolt; 206, wiring terminal assembly; 206a, connecting section; 206b, telescopic section; 206b-1, blocking groove; 206c, trigger rod; 206c-1, sliding groove; 207, first spring; 208, locking assembly; 208a, extension rod; 208b, locking buckle; 209, double-layer metal sheet. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may obtain other implementation methods without violating the connotation of the present invention and without paying creative labor. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] See also Figures 1 to 10 The present invention provides a split type circuit breaker, and the technical solution is as follows:

[0046] The split type circuit breaker comprises a main body 100 and a split body 200, wherein the main body 100 comprises a main housing 101 and a static contact sheet 102, the split body 200 comprises a split housing 201, a telescopic column 202, a wiring hole 203, a bolt hole 204, a wiring bolt 205, a wiring terminal assembly 206, a first spring 207, a locking assembly 208 and a double-layer metal sheet 209, the main housing 101 comprises a placement groove 101a and an arc-shaped limiting groove 101b, and the arc-shaped limiting groove 101b comprises a right-angle section 101 b-1 and arc surface segment 101b-2, the split shell 201 includes a first fixed plate 201a, a second fixed plate 201b, an anti-touch plate 201c, a bolt blocking plate 201d and a spring support plate 201e, the terminal block assembly 206 includes a connecting section 206a, a telescopic section 206b and a trigger rod 206c, the telescopic section 206b includes a blocking groove 206b-1, the trigger rod 206c includes a sliding groove 206c-1, and the locking assembly 208 includes an extension rod 208a and a locking buckle 208b.

[0047] As an embodiment of the present invention, refer to Figure 1 and Figure 2, a main body 100, and two groups of split parts 200 respectively connected to the top and bottom of the main body 100; wherein the main body 100 includes a main housing 101, and a static contact sheet 102 connected to the main housing 101; the split part 200 includes a split housing 201 connected to the main housing 101 through a telescopic column 202, a wiring hole 203 and a bolt hole 204 provided on the split housing 201, a wiring bolt 205 connected to the bolt hole 204, a wiring terminal assembly 206 threadedly connected to the wiring bolt 205, two groups of first springs 207 connected to the split housing 201, two groups of locking assemblies 208 respectively connected to the two groups of first springs 207, and a double-layer metal sheet 209 connected to the locking assemblies 208 at both ends; the static contact sheet 102 is located between the two ends of the wiring terminal assembly 206, and the cable passes through the wiring hole 203 and is located between the static contact sheet 102 and the wiring terminal assembly 206, the double-layer metal sheet 209 can be slightly closer to one side of the cable relative to the static contact sheet 102, the double-layer metal sheet 209 is only away from the side of the wiring bolt 205 and is slightly closer to the side of the cable when the static contact sheet 102 is placed, and will be close to the cable when the cable is fixed. When the double-layer metal sheet 209 is heated, the two ends of the double-layer metal sheet 209 bend toward the cable side, which will increase the sensitivity to the temperature change of the cable, so that when the temperature of the cable rises, the double-layer metal sheet 209 will be more sensitive to the temperature change of the cable. When the temperature of the cable rises, the double-layer metal sheet 209 will bend more quickly, and the two ends of the double-layer metal sheet 209 are heated and bent, driving the locking components 208 connected to it on both sides to release the limit from the main shell 101. When the cable temperature is too high and reaches a certain threshold, the double-layer metal sheet 209 bends to a certain angle at the same time, and the locking component 208 is deflected under the drive of the double-layer metal sheet 209, and at this time, it contacts the limit between the main shell 101, thereby separating the split component 200 from the main body 100.

[0048] As an embodiment of the present invention, refer to Figure 3 , Figure 4 and Figure 5The terminal assembly 206 includes a connecting section 206a, a telescopic section 206b, and a trigger rod 206c; the connecting section 206a is slidably connected to the telescopic section 206b, the connecting bolt 205 is threadedly connected to the connecting section 206a, the trigger rod 206c is slidably connected to the connecting section 206a, and the trigger rod 206c can block the telescopic connection between the connecting section 206a and the telescopic section 206b; blocking grooves 206b-1 adapted to the trigger rod 206c are also provided on both sides of the telescopic section 206b, and a sliding groove 206c-1 is provided on the trigger rod 206c close to the telescopic section 206b, and the telescopic section 206b passes through the sliding groove 206c-1 The trigger rod 206c can move axially relative to the wiring bolt 205. The exposed part of the bottom end of the trigger rod 206c is an arc end face. The trigger rod 206c can be touched by the double-layer metal sheet 209 and slide into the inside of the connecting section 206a. The trigger rod 206c is slidably connected to the bottom of the connecting section 206a. The telescopic section 206b can slide to move the blocking groove 206b-1 to the trigger rod 206c. The trigger rod 206c can slide down along the blocking groove 206b-1 to place the cable from the wiring hole 203 between the static contact sheet 102 and the wiring terminal. The wiring terminal is driven by the wiring bolt 205 to achieve clamping and fixing of the cable. By rotating the wiring The bolt 205 drives the terminal connected with the thread to move horizontally, so that the telescopic end of the terminal is close to the static contact sheet 102, the cable is fixed between the telescopic section 206b and the static contact sheet 102, and the main body 100 is connected through the static contact sheet 102 to realize the circuit power supply, wherein when the telescopic section 206b moves and clamps the cable, the trigger rod 206c is close to the double-layer metal sheet 209, and the double-layer metal sheet 209 is bent due to the heat of the cable, and when it is bent to a certain extent, it will touch the trigger rod 206c and move upward, and the telescopic section 206b is affected by the trigger rod 206c and can move upward on the trigger rod 206c When it reaches a certain position, the telescopic section 206b and the connecting section 206a can be stretched relatively. There are many reasons for the circuit breaking, but most of them are due to certain problems with the current in the line, such as short circuit overload, which will automatically disconnect. The wires are clamped and fixed at the terminal, and the connection will not be completely lost. Combined with the current actual scenario, when the cable is heated and red due to other reasons, the terminal will still remain connected and cannot be disconnected. The setting of the telescopic section 206b can provide an unlockable space when an accident occurs to the cable, so that the telescopic section 206b can be stretched to a certain extent, so that the cable can be disconnected by itself.

[0049] As an embodiment of the present invention, refer to Figure 6 and Figure 7The main housing 101 includes a placement groove 101a arranged at the top thereof, and two sets of arc-shaped limiting grooves 101b arranged at the top of the main housing 101. The static contact piece 102 is inserted into the placement groove 101a. The locking assembly 208 can be engaged with the arc-shaped limiting groove 101b. The static contact piece 102 is connected to the main housing 101 and passes through the placement groove 101a to the bottom of the wiring port. When wiring, it will be clamped between the static contact piece 102 and the wiring terminal assembly 206, thereby achieving The connection of the wires between the main parts 100, because the integral circuit breaker adopts a split setting, it is necessary to ensure that the lines can be kept connected when the circuit breaker is in normal working state, so that the split part 200 as a whole can be kept in close contact with the main part 100, and through the arc-shaped limit groove 101b and the locking component 208, the circuit breaker can be kept in close contact with the main part 100 when the locking component 208 and the arc-shaped limit groove 101b limit each other, thereby maintaining stable conductivity.

[0050] As an embodiment of the present invention, refer to Figure 8 The locking assembly 208 includes an extension rod 208a connected to the double-layer metal sheet 209, and a locking buckle 208b arranged at the bottom of the extension rod 208a. The length of the extension rod 208a is proportional to the angle of bending and rotation of the double-layer metal sheet 209 when heated. The bottom of the locking buckle 208b is an arc surface and the top is a horizontal plane. The double-layer metal sheet 209 is tightly attached to the cable after wiring, and bends when the double-layer metal sheet 209 is heated to too high a temperature. The extension rods 208a connected at both ends of the double-layer metal sheet 209 deflect simultaneously along the connection. Due to the connection position, the longer the extension rod 208a is, the smaller the deflection angle of the bottom locking buckle 208b is. The length of the extension rod 208a is proportional to the angle of bending and rotation of the double-layer metal sheet 209 when heated to assist in controlling the unlocking timing.

[0051] As an embodiment of the present invention, refer to Figure 3 or Figure 5The split housing 201 includes a first fixing plate 201a disposed at the bottom thereof near the wiring bolt 205, a second fixing plate 201b disposed on the split housing 201 and located on the opposite side of the first fixing plate 201a, an anti-touch plate 201c connected to one side of the wiring hole 203, a bolt blocking plate 201d disposed at the bottom of the anti-touch plate 201c, and a spring support plate 201e fixedly connected to the top of the second fixing plate 201b, the bolt blocking plate 201d is tightly attached to the wiring bolt 205, the two ends of the two groups of first springs 207 are respectively connected to the spring support plate 201e and the extension rod 208a, the first spring 207 is fixedly connected to the spring support plate 201e, and the first spring 207 It is rotatably connected to the end of the extension rod 208a close to the double-layer metal sheet 209, so that it can be easier to maintain the connection with the locking rod when the double-layer metal sheet 209 rotates. The main reason for the virtual connection of the cable is that the vibration generated by industrial production causes the cable to become loose to a certain extent, thereby causing the conductive virtual connection of the cable. The first spring 207 is connected to the extension rod 208a, so that the extension rod 208a can be in the space of the arc-shaped limit groove 101b and produce a displacement in the direction of the cable. While the terminal block is fixed to the static contact sheet 102, an additional lateral auxiliary clamping elastic force is applied by the first spring 207 to offset a part of the force of the cable moving due to vibration and further maintain the stability of the cable.

[0052] As an embodiment of the present invention, refer to Figure 6 and Figure 7 The arc-shaped limiting groove 101b includes a right-angle section 101b-1 and an arc surface section 101b-2. The arc length of the arc surface section 101b-2 is proportional to the length of the extension rod 208a, that is, the arc length of the arc surface section 101b-2 is proportional to the angle of the double-layer metal sheet 209 when it is bent and rotated by heat. The locking buckle 208b can be released from the arc surface section 101b-2 and the limit between the arc-shaped limiting groove 101b. When it is located at the right-angle section 101b-1, it means that the double-layer metal sheet 209 has not been heated. The heat completely drives the extension rod 208a, which can better prevent the influence of vibration on the cable. When the locking buckle 208b at the bottom of the extension rod 208a is located at the arc surface segment 101b-2, it indicates that the double-layer metal sheet 209 has been bent to a certain extent due to heat, so that the extension rod 208a moves slowly along the arc limit groove 101b until the locking buckle 208b and the arc limit groove 101b are released from the limit, thereby warning that the cable has undetectable overheating and needs to be disconnected in time to ensure line safety.

[0053] As an embodiment of the present invention, refer to Fig. 9 and Fig.10The static contact sheet 102 is L-shaped, and the static contact sheet 102 is located on the side of the bolt blocking plate 201d away from the wiring bolt 205. The static contact sheet 102 is provided with an arc bending area 102a at the bending part, and the height of the arc bending area 102a is greater than the height of the double-layer metal sheet 209. The height difference between the second fixed plate 201b and the terminal assembly 206 is the same as the height of the double-layer metal sheet 209. If the cable is overheated, the double-layer metal sheet 209 will bend between the second fixed plate 201b and the terminal assembly 206. The height between the double-layer metal sheet 209 and the second fixed plate 201b and the terminal assembly 206 is the same, and the double-layer When the metal sheet 209 is bent by heat, the upper and lower ends will be close to the terminal assembly 206 and the second fixed plate 201b respectively, and when the double-layer metal sheet 209 is bent to a certain angle, it will touch the trigger rod 206c, so that the telescopic section 206b and the connecting section 206a are unlocked and stretched. When the telescopic section 206b is unlocked, the double-layer metal sheet 209 is kept in lateral displacement under the tension of the first spring 207 and is not prone to deflection. When the double-layer metal sheet 209 is displaced, it will drive the cable and the telescopic section 206b on one side of the cable to produce a certain displacement, so that the cable is de-energized from the static contact sheet 102, ensuring that the cable is disconnected.

[0054] Working principle: Place the cable in the split part 200 through the wiring hole 203, and rotate the wiring bolt 205 so that the wiring bolt 205 drives the wiring terminal assembly 206 to clamp the cable. At this time, the cable touches the double-layer metal sheet 209, so that the double-layer metal sheet 209 is in close contact with the cable. When the cable generates abnormal heat that does not cause the circuit breaker to disconnect, the double-layer metal sheet 209 will bend, and the two ends will gradually approach the cable, and when a certain angle is reached, the locking assembly 208 is released from the limit between the main shell 101, so that the main part 100 and the split part 200 are separated, and when the double-layer metal sheet 209 is bent, it touches the bottom of the trigger rod 206c, so that the telescopic section 206b can be stretched, and driven by the first spring 207, the cable and the telescopic section 206b are driven to move a certain distance away from the static contact sheet 102, so that the circuit breaker loses power;

[0055] Specifically, the split component 200 is pressed and the extension rod 208a is adjusted to place the locking buckle 208b at the arc-shaped limiting groove 101b, so that the locking buckle 208b is located at the bottom of the arc-shaped limiting groove 101b, and they are limited to each other to keep the split component 200 and the main component 100 in close contact;

[0056] When wiring, the cable is placed between the static contact sheet 102 and the wiring terminal through the wiring hole 203. The wiring terminal is driven by the wiring bolt 205 to clamp and fix the cable. The wiring terminal threadedly connected to it is driven to move horizontally by rotating the wiring bolt 205, so that the telescopic end of the wiring terminal is close to the static contact sheet 102, and the cable is fixed between the telescopic section 206b and the static contact sheet 102. The main body 100 is connected through the static contact sheet 102 to realize the circuit power-on.

[0057] When the cable is energized, the vibration generated by industrial production may cause the cable to become loose to a certain extent, which may easily lead to a virtual connection of the cable. The first spring 207 is connected to the extension rod 208a, and the length of the arc-shaped limit groove 101b in the axial direction of the wiring bolt 205 is greater than the length of the extension rod 208a, so that the extension rod 208a can be in the space of the arc-shaped limit groove 101b and produce a displacement in the direction of the cable. While the wiring terminal is fixed to the static contact piece 102, an additional lateral auxiliary clamping elastic force is applied by the first spring 207 to offset a part of the force of the cable moving due to vibration, thereby further maintaining the stability of the cable.

[0058] When the cable generates abnormal heat that does not cause the circuit breaker to disconnect, when the telescopic section 206b moves and clamps the cable, the trigger rod 206c will be close to the double-layer metal sheet 209, and the double-layer metal sheet 209 will bend due to the heat of the cable. At this time, the two ends of the double-layer metal sheet 209 will gradually approach the cable, so that the contact area between the double-layer metal sheet 209 and the cable will gradually increase, so that the double-layer metal sheet 209 is more sensitive to the temperature change of the cable, and when it is bent to a certain angle, it will touch the trigger rod 206c and move up. When the telescopic section 206b is affected by the trigger rod 206c and moves to a certain position on the trigger rod 206c, The telescopic section 206b and the connecting section 206a can produce relative stretching. At the same time, when the double-layer metal sheet 209 is bent to a certain angle, the two ends will drive the extension rod to deflect, so that the extension rod 208a moves slowly along the arc limit groove 101b until the locking buckle 208b and the arc limit groove 101b are released from the limit. At this time, under the action of the telescopic column 202, the split component 200 will be separated from the main component 100, and driven by the first spring 207, the cable and the telescopic section 206b will be displaced a certain distance away from the static contact piece 102, so that the cable is not energized with the circuit breaker, thereby warning the cable to be overheated in an undetectable manner and to be disconnected in time to ensure line safety.

[0059] The above implementation modes are only used to illustrate some examples of the technical solutions of the present invention that can be implemented rather than to limit the implementation modes. The present invention can be understood in more detail with reference to the embodiments. Those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A split type circuit breaker, characterized in that: include, A main body (100), and two groups of sub-pieces (200) respectively connected to the top and bottom of the main body (100); The main body (100) comprises a main housing (101) and a stationary contact piece (102) connected to the main housing (101); The split component (200) comprises a split housing (201) connected to the main housing (101) via a telescopic column (202), a wiring hole (203) and a bolt hole (204) provided on the split housing (201), a wiring bolt (205) connected to the bolt hole (204), a wiring terminal assembly (206) threadedly connected to the wiring bolt (205), two groups of first springs (207) connected to the split housing (201), two groups of locking assemblies (208) respectively connected to the two groups of first springs (207), and a double-layer metal sheet (209) connected to the locking assemblies (208) at both ends; The static contact sheet (102) is located between the two ends of the wiring terminal assembly (206); the cable passes through the wiring hole (203) and is located between the static contact sheet (102) and the wiring terminal assembly (206); the double-layer metal sheet (209) can be slightly closer to one side of the cable relative to the static contact sheet (102); when the double-layer metal sheet (209) is heated, the two ends of the double-layer metal sheet (209) bend toward the cable side, which increases the sensitivity to the temperature change of the cable; and the two ends of the double-layer metal sheet (209) are bent by heat, driving the locking assembly (208) and the main housing (101) connected thereto on both sides to release the limit.

2. The split type circuit breaker according to claim 1, characterized in that: The terminal block assembly (206) comprises a connecting section (206a), a telescopic section (206b), and a trigger rod (206c); the connecting section (206a) is slidably connected to the telescopic section (206b), the connecting bolt (205) is threadedly connected to the connecting section (206a), the trigger rod (206c) is slidably connected to the connecting section (206a), and the trigger rod (206c) can prevent the connecting section (206a) and the telescopic section (206b) from telescoping.

3. The split type circuit breaker according to claim 2, characterized in that: Blocking grooves (206b-1) adapted to the trigger rod (206c) are also arranged on both sides of the telescopic section (206b); a sliding groove (206c-1) is arranged on one side of the trigger rod (206c) close to the telescopic section (206b); the telescopic section (206b) can move axially relative to the connecting bolt (205) by passing through the sliding groove (206c-1); the exposed portion of the bottom end of the trigger rod (206c) is an arc end surface; the trigger rod (206c) can be touched by the double-layer metal sheet (209) and slide into the inside of the connecting section (206a); the trigger rod (206c) is slidably connected to the bottom of the connecting section (206a); the telescopic section (206b) can slide to move the blocking groove (206b-1) to the trigger rod (206c); and the trigger rod (206c) can slide down along the blocking groove (206b-1).

4. The split type circuit breaker according to claim 3, characterized in that: The main housing (101) comprises a placement groove (101a) arranged at the top thereof, and two groups of arc-shaped limiting grooves (101b) arranged at the top of the main housing (101); the static contact piece (102) is inserted into the placement groove (101a); and the locking assembly (208) can be snap-connected with the arc-shaped limiting groove (101b).

5. The split type circuit breaker according to claim 4, characterized in that: The locking assembly (208) comprises an extension rod (208a) connected to the double-layer metal sheet (209), and a locking buckle (208b) arranged at the bottom of the extension rod (208a), the length of the extension rod (208a) is proportional to the angle of bending and rotation of the double-layer metal sheet (209) when heated, and the bottom of the locking buckle (208b) is an arc surface and the top is a horizontal plane.

6. The split type circuit breaker according to claim 5, characterized in that: The split housing (201) comprises a first fixing plate (201a) arranged at the bottom thereof close to the wiring bolt (205), a second fixing plate (201b) arranged at the split housing (201) and located on the side opposite to the first fixing plate (201a), an anti-touch plate (201c) connected to one side of the wiring hole (203), a bolt blocking plate (201d) arranged at the bottom of the anti-touch plate (201c), and a spring support plate (201e) fixedly connected to the top of the second fixing plate (201b), wherein the bolt blocking plate (201d) is in close contact with the wiring bolt (205).

7. The split type circuit breaker according to claim 6, characterized in that: The two ends of the two groups of the first springs (207) are respectively connected to the spring support plate (201e) and the extension rod (208a); the first springs (207) are fixedly connected to the spring support plate (201e); and the first springs (207) are rotatably connected to one end of the extension rod (208) close to the double-layer metal sheet (209).

8. The split type circuit breaker according to claim 7, characterized in that: The arc-shaped limiting groove (101b) comprises a right-angle section (101b-1) and an arc surface section (101b-2); the arc length of the arc surface section (101b-2) is proportional to the length of the extension rod (208a), that is, the arc length of the arc surface section (101b-2) is proportional to the angle of the double-layer metal sheet (209) bent and rotated when heated; and the locking buckle (208b) can release the limiting position between the arc-shaped limiting groove (101b) and the arc surface section (101b-2).

9. The split type circuit breaker according to any one of claims 6 to 8, characterized in that: The static contact sheet (102) is L-shaped, and is located on the side of the bolt blocking plate (201d) away from the connection bolt (205). An arc-shaped bending area (102a) is provided at the bending part of the static contact sheet (102), and the height of the arc-shaped bending area (102a) is greater than the height of the double-layer metal sheet (209).

10. The split type circuit breaker according to any one of claims 6 to 8, characterized in that: The height difference between the second fixing plate (201b) and the terminal assembly (206) is the same as the height of the double-layer metal sheet (209).

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