Circuit breaker and electric cabinet

Abstract

The utility model discloses a circuit breaker and an electric cabinet. The circuit breaker comprises a fixed plate, a protective cover, a trip coil, a linkage mechanism and a crank arm, the protective cover is arranged on one side of the fixed plate, and an accommodating space is formed by the protective cover and the fixed plate; the trip coil is arranged on the protective cover and located outside the accommodating space; one end of the linkage mechanism is linked with the trip coil, and the other end of the linkage mechanism extends towards the accommodating space; the crank arm is arranged in the accommodating space, the trip coil is used for driving the linkage mechanism to be separated from the crank arm for opening, and a reset through hole is formed in the fixed plate and corresponds to the trip coil. According to the technical scheme, after the circuit breaker is opened, resetting can be effectively achieved, and it is guaranteed that a loop recovers to work normally.

Description

Technical Field

[0001] The present application belongs to the technical field of circuit breakers, and in particular relates to a circuit breaker and an electric cabinet. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. Therefore, as an important basic component in the electrical industry, the reliable opening and resetting of the circuit breaker is very important for the circuit.

[0003] However, the tripping coils currently used in circuit breakers are all placed inside the circuit breakers. If the external panel is not removed, the tripping coils are difficult to reset after the circuit is opened, and the circuit cannot be restored to normal operation. Utility Model Content

[0004] The purpose of the present application is to provide a circuit breaker that can effectively achieve reset after the circuit breaker is opened to ensure that the circuit resumes normal operation.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] According to one aspect of an embodiment of the present application, the present application provides a circuit breaker, the circuit breaker comprising:

[0007] Fixed plate;

[0008] A protective cover, the protective cover is arranged on one side of the fixing plate and forms a containing space with the fixing plate;

[0009] A tripping coil, wherein the tripping coil is disposed on the protective cover and is located outside the accommodating space;

[0010] A linkage mechanism, one end of which is linked to the trip coil and the other end of which extends toward the accommodating space;

[0011] A crank arm, wherein the crank arm is disposed in the accommodating space, and the tripping coil is used to drive the linkage mechanism and the crank arm to disengage and open the gate;

[0012] Wherein, the fixing plate is provided with a reset through hole, and the reset through hole is arranged corresponding to the tripping coil.

[0013] In one aspect, the linkage mechanism includes a gate plate and a rotating shaft, the gate plate is arranged between the tripping coil and the fixed plate, the reset through hole is arranged corresponding to the gate plate, the rotating shaft is connected to the gate plate, and the tripping coil is used to drive the gate plate to move toward the fixed plate to rotate the rotating shaft.

[0014] In one aspect, the gate plate includes an abutment plate and a lap plate, the abutment plate is connected to one end of the tripping coil, the lap plate is arranged at the other end of the abutment plate, a notch is arranged on the radial surface of the rotating shaft, and the lap plate is fixed to the notch of the rotating shaft.

[0015] In one aspect, the circuit breaker further includes a fixing member, and the fixing member is sequentially passed through the jumper and the rotating shaft.

[0016] In one aspect, an included angle between the abutment sheet and the overlap sheet is set, and the included angle is between 45° and 135°.

[0017] In one aspect, the linkage mechanism further comprises a swing arm, a connecting rod and a contact rod, one end of the swing arm is connected to one end of the rotating shaft, the other end of the swing arm is connected to the connecting rod, the contact rod is arranged at one end of the connecting rod away from the swing arm, and the crank arm is buckled with the contact rod;

[0018] The rotation of the rotating shaft drives the swing arm, and the movement of the connecting rod drives the contact rod to contact the crank arm.

[0019] In one aspect, the circuit breaker further includes an elastic member and a positioning plate, the elastic member is sleeved on the connecting rod, the positioning plate is fixed in the accommodating space, one end of the elastic member is connected to the connecting rod, and the other end of the elastic member is connected to the positioning plate.

[0020] In one aspect, the circuit breaker further includes a first support plate and a second support plate, wherein the first support plate and the second support plate are fixed to the fixing plate, and the first support plate and the second support plate are respectively disposed at two axial ends of the rotating shaft.

[0021] In one aspect, the trip coil has a power dissipation of less than 200 watts.

[0022] In addition, in order to solve the above-mentioned problem, the present application also provides an electric cabinet, which includes a cabinet body and a circuit breaker as described above, and the circuit breaker is arranged in the cabinet body.

[0023] In the present application, after the tripping coil receives the tripping signal, the tripping coil takes effect, driving the linkage mechanism to move, and the movement of the linkage mechanism contacts the crank arm. That is, the movement of the linkage mechanism will act on the crank arm, thereby causing the crank arm to rotate, and the opening of the circuit breaker is achieved through the crank arm. When the circuit breaker needs to be reset, the tripping coil is pushed through the reset through hole, which in turn drives the linkage mechanism to move in the opposite direction, and the linkage mechanism is disengaged from the crank arm, and the closing of the circuit breaker is achieved through the crank arm. It can be seen from this that the technical solution of the present application can effectively achieve reset after the circuit breaker is opened, ensuring that the circuit resumes normal operation.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 The schematic diagram shows the structure of the circuit breaker in the closed state of the present application.

[0027] Figure 2 The present application is schematically shown Figure 1 Enlarged schematic diagram of part A of the circuit breaker.

[0028] Figure 3 The present application is schematically shown Figure 1 Exploded view of the retaining plate and protective cover in a circuit breaker.

[0029] Figure 4 The schematic diagram shows the structure of the circuit breaker in the open state of the present application.

[0030] Figure 5 The present application is schematically shown Figure 4 Enlarged schematic diagram of part B of the circuit breaker.

[0031] Figure 6 The back structure diagram of the circuit breaker of the present application in the open state is schematically shown.

[0032] Figure 7 The present application is schematically shown Figure 6 Enlarged schematic diagram of part C of the circuit breaker.

[0033] Figure 8 Schematic diagram showing the back structure of the circuit breaker in the closed state of the present application

[0034] Fig. 9 The present application is schematically shown Figure 8 Enlarged schematic diagram of part D of the circuit breaker.

[0035] Fig.10 The schematic diagram of the linkage mechanism in the circuit breaker of the present application is schematically shown.

[0036] The following are the descriptions of the reference numerals:

[0037] 100, fixing plate; 110, protective cover; 120, tripping coil; 130, linkage mechanism; 140, crank arm; 150, elastic member; 160, positioning plate; 170, first supporting plate; 180, second supporting plate;

[0038] 101, reset through hole; 131, gate plate; 132, rotating shaft; 133, swing arm; 134, connecting rod; 135, contact rod;

[0039] 1311. abutment piece; 1312. overlap piece; 1321. notch. DETAILED DESCRIPTION

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0041] See also Figures 1 to 9 As shown, the present application provides a circuit breaker, which includes: a fixed plate 100, a protective cover 110, a trip coil 120, a linkage mechanism 130 and a crank arm 140. The working principle of the trip coil 120 is mainly to achieve circuit protection and disconnection through electromagnetic effect. When a control signal is applied to the trip coil 120, a current is generated in the coil, and this current generates a magnetic field around it. Under the action of the magnetic field, the armature inside the trip coil 120 is attracted, and then pushes the structure connected to the linkage mechanism 130, causing the contacts of the linkage mechanism 130 and the crank arm 140 of the circuit breaker to separate, thereby cutting off the circuit and realizing the opening operation to ensure safety.

[0042] In addition, it is also possible that current originally flows in the trip coil 120 to form a stable magnetic field. When the control signal is applied to the trip coil 120, the current in the trip coil 120 disappears, and the magnetic field disappears, thereby making the armature lose its attraction, and a thrust can be generated under the action of a spring, etc., which can also push the linkage mechanism 130 to move.

[0043] Specifically, the protective cover 110 is arranged on one side of the fixed plate 100 and forms a storage space with the fixed plate 100. The protective cover 110 can be buckled on one side of the fixed plate 100, and the storage space can protect the components placed therein; the tripping coil 120 is arranged on the protective cover 110 and is located outside the storage space, for example, the tripping coil 120 can be fixed on the protective cover 110; one end of the linkage mechanism 130 is linked with the tripping coil 120, and the other end extends to the storage space. Through the connection setting between the linkage mechanism 130 and the tripping coil 120, when the tripping coil 120 generates thrust, the thrust can act on the linkage mechanism 130, thereby driving the linkage mechanism 130 to move; the crank arm 140 is arranged in the storage space, and the tripping coil 120 is used to drive the linkage mechanism 130 to contact the crank arm 140, thereby driving the crank arm 140 to rotate. Among them, the fixed plate 100 is provided with a reset through hole 101, and the reset through hole 101 is arranged corresponding to the tripping coil 120. After the linkage mechanism 130 and the crank arm 140 are in contact, the trip coil 120 can be reset through the reset through hole 101. For example, a tool can be passed through the reset through hole 101 to apply pressure to the trip coil 120 to reset the trip coil 120. Then, the linkage mechanism 130 drives the crank arm 140 to reset.

[0044] In this embodiment, after the tripping coil 120 receives the tripping signal, the tripping coil 120 takes effect, driving the linkage mechanism 130 to move, and the movement of the linkage mechanism 130 contacts the crank arm 140. That is, the movement of the linkage mechanism 130 will act on the crank arm 140, so that the crank arm 140 rotates, and the opening of the circuit breaker is achieved through the crank arm 140. When the circuit breaker needs to be reset, the tripping coil 120 is pushed through the reset through hole 101, and then the linkage mechanism 130 is driven to move in the opposite direction, the linkage mechanism 130 is disengaged from the crank arm 140, and the closing of the circuit breaker is achieved through the crank arm 140. It can be seen from this that the technical solution of the present application can effectively achieve reset after the circuit breaker is opened, ensuring that the circuit resumes normal operation.

[0045] In one embodiment of the present application, the linkage mechanism 130 includes a gate plate 131 and a rotating shaft 132. The gate plate 131 is arranged between the tripping coil 120 and the fixed plate 100. The reset through hole 101 is arranged corresponding to the gate plate 131. The rotating shaft 132 is connected to the gate plate 131. The tripping coil 120 is used to drive the gate plate 131 to move toward the fixed plate 100 so that the rotating shaft 132 rotates. After the tripping coil 120 receives the control signal of the gate opening, the tripping coil 120 pushes the gate plate 131 to move, and the movement of the gate plate 131 drives the rotating shaft 132 to rotate. The rotation of the rotating shaft 132 can realize the transmission of power. When resetting is required, the gate plate 131 can be pressed through the reset through hole 101, and the gate plate 131 moves in the direction of the tripping coil 120, so that the gate plate 131 drives the rotating shaft 132 to rotate in the opposite direction to realize the reset of the position.

[0046] The movement of the gate plate 131 may be achieved by providing a guide shaft on the tripping coil 120 , the guide shaft may be arranged perpendicular to the gate plate 131 , the gate plate 131 is arranged on the guide shaft, and the gate plate 131 may move along the guide shaft.

[0047] In one embodiment of the present application, the gate plate 131 includes an abutment piece 1311 and a lap piece 1312. The abutment piece 1311 is connected to one end of the tripping coil 120, and the lap piece 1312 is arranged at the other end of the abutment piece 1311. A notch 1321 is arranged on the radial surface of the rotating shaft 132. The lap piece 1312 is fixed to the notch 1321 of the rotating shaft 132, and the lap piece 1312 can be fitted together with the notch 1321 of the rotating shaft 132. The rotating shaft 132 can be arranged above the tripping coil 120, and there is a certain angle between the abutment piece 1311 and the lap piece 1312. When the tripping coil 120 drives the abutment piece 1311 to move, the lap piece 1312 moves synchronously, thereby transmitting the force of the gate plate 131 to the rotating shaft 132, so that the rotating shaft 132 rotates.

[0048] The specific process of causing the rotating shaft 132 to rotate is that the stripping coil generates power to push the abutment sheet 1311. Since there is a certain angle between the abutment sheet 1311 and the lap sheet 1312, and the lap sheet 1312 is fixed at the position of the rotating shaft 132. In other words, the gate plate 131 is connected to the stripping coil at one end and connected to the rotating shaft 132 at the other end. The stripping coil pushes the gate plate 131, so that the gate plate 131 rotates around the end close to the rotating shaft 132, and the rotation of the gate plate 131 drives the rotating shaft 132 to rotate.

[0049] In one embodiment of the present application, the angle between the abutment piece 1311 and the overlap piece 1312 is set to be between 45° and 135°. The material of the gate plate 131 is relatively hard, and the angle between the abutment piece 1311 and the overlap piece 1312 remains fixed. The range of the angle can be 45°, 65°, 85°, 90°, 95°, 110°, 120°, 135°, etc.

[0050] In one embodiment of the present application, the circuit breaker further includes a fixing member, which is sequentially inserted through the lap piece 1312 and the rotating shaft 132. In order to ensure that the gate plate 131 can effectively drive the rotating shaft 132 to rotate, the lap piece 1312 and the rotating shaft 132 can be fixed together by moving the fixing member. For example, the fixing member is a screw or a rivet, and fixing holes are provided on the lap piece 1312 and the rotating shaft 132. The fixing holes on the lap piece 1312 and the rotating shaft 132 are correspondingly arranged, and the fixing member is sequentially inserted through the two fixing holes, thereby fixing the lap piece 1312 and the rotating shaft 132 together.

[0051] There may be two fixing members, or more than two fixing members, to ensure that the overlapping piece 1312 and the rotating shaft 132 are fixed more firmly and the force is more balanced.

[0052] In one embodiment of the present application, the linkage mechanism 130 also includes a swing arm 133, a connecting rod 134 and a contact rod 135. One end of the swing arm 133 is connected to one end of the rotating shaft 132, and the other end of the swing arm 133 is connected to the connecting rod 134. The contact rod 135 is arranged at the end of the connecting rod 134 away from the swing arm 133, and the crank arm 140 is buckled with the contact rod 135; the rotating shaft 132 rotates to drive the swing arm 133, and the connecting rod 134 moves to drive the contact rod 135 to contact the crank arm 140, thereby transmitting power to the crank arm 140, thereby realizing the opening of the gate through the crank arm 140.

[0053] Before the circuit breaker is opened, the circuit breaker is in the closed state, that is, the crank arm 140 is out of contact with the contact rod 135. When the circuit breaker needs to be opened, the opening plate 131 moves, driving the rotating shaft 132 to rotate. The rotation of the rotating shaft 132 drives the swing arm 133 to rotate. The rotating shaft 132 is fixedly connected to the swing arm 133, and the rotation of the rotating shaft 132 can be transmitted to the swing arm 133. The swing arm 133 is rotatably connected to the connecting rod 134. When the rotating shaft 132 rotates, one end of the swing arm 133 is fixed and the other end moves. For example, when it moves upward, the connecting rod 134 is driven to move upward. During the upward movement of the connecting rod 134, the contact rod 135 is also moved upward synchronously. When the crank arm 140 is out of contact with the contact rod 135, the universal movement is realized, thereby synchronously driving the crank arm 140 to complete the opening operation.

[0054] See also Fig.10 As shown, in one embodiment of the present application, the circuit breaker also includes an elastic member 150 and a positioning plate 160, the elastic member 150 is sleeved on the connecting rod 134, the positioning plate 160 is fixed in the accommodating space, one end of the elastic member 150 is connected to the connecting rod 134, and the other end of the elastic member 150 is connected to the positioning plate 160.

[0055] The setting of the elastic member 150 can improve the convenience of the closing reset operation. For example, when the connecting rod 134 moves upward, the elastic member 150 is compressed to generate elastic deformation, and the elastic member 150 generates an elastic restoring force. The elastic restoring force is downward, and when the closing reset is performed, it can accelerate the downward movement of the connecting rod 134 and quickly achieve the closing.

[0056] In order to reduce the excessive movement of the connecting rod 134, causing the contact rod 135 to be too far away from the connecting rod 134. In one embodiment of the present application, the circuit breaker further includes a limiter and a limit plate, the limiter is arranged in the accommodating space, the limit plate is arranged on the connecting rod 134, and the upper surface of the limit plate is arranged toward the lower surface of the limiter.

[0057] Specifically, during the upward movement of the connecting rod 134, the limit plate moves synchronously with the connecting rod 134, and during the gradual upward movement of the limit plate, it gradually approaches the limiter. When the limit plate abuts against the limiter, the upward position of the connecting rod 134 is fixed, and the connecting rod 134 rises to the maximum height. At this time, the contact rod 135 and the crank arm 140 are at a certain distance and will not easily contact each other. At the same time, it can ensure that when the switch needs to be reset and closed, the connecting rod 134 moves a shorter distance, so that the contact rod 135 and the crank arm 140 can be in contact. The contact rod 135 can be a pin fixed on the connecting rod 134, and the extension direction of the pin is perpendicular to the connecting rod 134.

[0058] In addition, the position of the limiter can also be set to a micro switch. When the limit plate contacts the limiter, the micro switch is triggered and started, which can send a signal to open the gate, facilitating subsequent operation instructions.

[0059] In one embodiment of the present application, the circuit breaker further includes a first support plate 170 and a second support plate 180 , which are fixed to the fixing plate 100 , and are disposed at two axial ends of the rotating shaft 132 .

[0060] By disposing the first support plate 170 and the second support plate 180 , the position of the rotating shaft 132 can be fixed to ensure that the rotating shaft 132 can only rotate, thereby avoiding the situation where the position of the rotating shaft 132 is offset.

[0061] In one embodiment of the present application, the power loss of the trip coil 120 is less than 200 watts. It can be 150 watts, 100 watts, 50 watts, etc., or 10 watts, or less than 10 watts. It can be seen that the trip coil 120 in the present application is a low-power coil. By setting the power consumption of the trip coil, power loss is saved.

[0062] Among them, the low-power coil belongs to the low-power high-thrust electromagnetic coil, which is a plastic-sealed electromagnetic coil with a chip. This is an electromagnetic coil with a chip inside the coil. The electromagnetic suction force of the coil will be greatly improved, the temperature rise of the electromagnetic coil will be significantly reduced, and the working power of the coil will be significantly reduced while the original data remains unchanged. The birth of this new type of coil makes the working pressure of the high-pressure valve higher, especially the temperature rise of the high-power coil is significantly reduced, and the ultra-low power operation is carried out, but the electromagnetic coil has a greater pulling and pushing force on the valve, etc., and there is no AC current noise, so it can be powered on for a long time.

[0063] The present application also provides an electric cabinet, which includes a cabinet body and a circuit breaker as described above, wherein the circuit breaker is arranged in the cabinet body. The cabinet body can be used to support an external integral frame of the circuit breaker.

[0064] For other specific implementations and beneficial effects of the electrical cabinet, please refer to the above-mentioned circuit breaker solution, which will not be described in detail here.

[0065] Those skilled in the art will readily come up with other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0066] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A circuit breaker, characterized in that: The circuit breaker comprises: Fixed plate; A protective cover, the protective cover is arranged on one side of the fixing plate and forms a containing space with the fixing plate; A tripping coil, wherein the tripping coil is disposed on the protective cover and is located outside the accommodating space; A linkage mechanism, one end of which is linked to the trip coil and the other end of which extends toward the accommodating space; A crank arm, wherein the crank arm is disposed in the accommodating space, and the tripping coil is used to drive the linkage mechanism and the crank arm to disengage and open the gate; Wherein, the fixing plate is provided with a reset through hole, and the reset through hole is arranged corresponding to the tripping coil.

2. The circuit breaker according to claim 1, characterized in that: The linkage mechanism includes a gate plate and a rotating shaft. The gate plate is arranged between the tripping coil and the fixed plate. The reset through hole is arranged corresponding to the gate plate. The rotating shaft is connected to the gate plate. The tripping coil is used to drive the gate plate to move toward the fixed plate to rotate the rotating shaft.

3. The circuit breaker according to claim 2, characterized in that: The gate plate includes an abutment piece and a lap piece, the abutment piece is connected to one end of the tripping coil, the lap piece is arranged at the other end of the abutment piece, a notch is arranged on the radial surface of the rotating shaft, and the lap piece is fixed to the notch of the rotating shaft.

4. The circuit breaker according to claim 3, characterized in that: The circuit breaker further comprises a fixing member, and the fixing member is sequentially passed through the connecting piece and the rotating shaft.

5. The circuit breaker according to claim 3, characterized in that: The included angle between the abutting piece and the overlapping piece is set between 45° and 135°.

6. The circuit breaker according to claim 2, characterized in that: The linkage mechanism further comprises a swing arm, a connecting rod and a contact rod, one end of the swing arm is connected to one end of the rotating shaft, the other end of the swing arm is connected to the connecting rod, the contact rod is arranged at one end of the connecting rod away from the swing arm, and the crank arm is buckled with the contact rod; The rotation of the rotating shaft drives the swing arm, and the movement of the connecting rod drives the contact rod to contact the crank arm.

7. The circuit breaker according to claim 6, characterized in that: The circuit breaker further comprises an elastic member and a positioning plate, wherein the elastic member is sleeved on the connecting rod, the positioning plate is fixed in the accommodating space, one end of the elastic member is connected to the connecting rod, and the other end of the elastic member is connected to the positioning plate.

8. The circuit breaker according to claim 2, characterized in that: The circuit breaker further includes a first support plate and a second support plate, wherein the first support plate and the second support plate are fixed to the fixing plate, and the first support plate and the second support plate are respectively arranged at two axial ends of the rotating shaft.

9. The circuit breaker according to any one of claims 1 to 8, characterized in that: The power loss of the trip coil is less than 200 watts.

10. An electric cabinet, characterized in that: The electric cabinet comprises a cabinet body and a circuit breaker as claimed in any one of claims 1 to 9, wherein the circuit breaker is arranged in the cabinet body.

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