Frame type circuit breaker accessory

Abstract

The utility model relates to an accessory of a frame-type circuit breaker. The accessory comprises an opening electromagnet assembly used for controlling the opening of the frame-type circuit breaker and a closing electromagnet assembly used for controlling the closing of the frame-type circuit breaker. The integrated electromagnet circuit board is used for controlling the opening electromagnet assembly and the closing electromagnet assembly to work, and the opening electromagnet assembly and the closing electromagnet assembly are both electrically connected with the integrated electromagnet circuit board. The integrated electromagnet circuit board is arranged outside the opening electromagnet assembly and the closing electromagnet assembly. According to the utility model, the integrated electromagnet circuit board is arranged at the outer sides of the opening electromagnet assembly and the closing electromagnet assembly, so that the total volume of the circuit board for controlling the opening electromagnet assembly and the closing electromagnet assembly is reduced, the volumes of an iron core and a coil in the electromagnet mechanism can be increased, and the maximum striking force of the electromagnet assembly is improved. Meanwhile, the integration of the circuit board also reduces the cost.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to an accessory for a frame-type circuit breaker. Background Art

[0002] In current frame-type circuit breakers, there are often a frame-type circuit breaker tripping mechanism triggered by an electromagnet assembly and a frame-type circuit breaker closing mechanism triggered by an electromagnet assembly. Currently, a shunt trip is often used as the frame-type circuit breaker tripping mechanism, and a closing electromagnet is often used as the frame-type circuit breaker closing mechanism.

[0003] Currently, in order to enhance the integrity of the structure, the shunt trip and the closing electromagnet usually integrate their own electromagnet assemblies and control circuit boards for controlling the operation of the electromagnet assemblies in a single housing.

[0004] However, the integrated design of the electromagnet assembly and the control circuit board in a single housing makes it inevitable that the vibration generated when the electromagnet assembly operates affects the control circuit board. Over time, the debris that falls off the control circuit board due to vibration falls into the electromagnet assembly. At the same time, the design of having control circuit boards in both the shunt trip and the closing electromagnet, that is, the design of two control circuit boards occupies a large space. When the total volume of the shunt trip and the closing electromagnet remains unchanged, it limits the volume of the iron core and coil in the electromagnet assembly, and thus limits the maximum striking force of the electromagnet assembly. In addition, for the integrated design of the electromagnet assembly and the control circuit board, once the control circuit board is damaged, the electromagnet assembly part also needs to be disassembled together, which is not conducive to the maintenance of the electromagnet assembly. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an accessory for a frame-type circuit breaker. By arranging the control circuit board outside the electromagnet assembly, it helps to increase the maximum striking force of the electromagnet mechanism and is convenient for maintenance.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] An accessory for a frame-type circuit breaker includes a tripping electromagnet assembly for controlling the tripping of the frame-type circuit breaker and a closing electromagnet assembly for controlling the closing of the frame-type circuit breaker. It also includes an integrated electromagnet circuit board for controlling the operation of the tripping electromagnet assembly and the closing electromagnet assembly. The tripping electromagnet assembly and the closing electromagnet assembly are both electrically connected to the integrated electromagnet circuit board, and the integrated electromagnet circuit board is arranged outside the tripping electromagnet assembly and the closing electromagnet assembly.

[0008] Further, the opening electromagnet assembly and the closing electromagnet assembly have the same structure, and both include a housing, a moving iron core disposed in the housing, a static iron core disposed in the housing, and a push rod disposed on the moving iron core. A through hole for the push rod to pass through is provided on the static iron core; one end of the moving iron core is disposed near the first end of the housing, one end of the static iron core is fixed on the second end of the housing, and the first end and the second end are disposed opposite to each other.

[0009] Furthermore, both the opening electromagnet assembly and the closing electromagnet assembly include an elastic member, and both ends of the elastic member are respectively connected to the moving iron core and the static iron core.

[0010] Still further, both the opening electromagnet assembly and the closing electromagnet assembly include a coil bracket disposed in the housing. The coil bracket and the moving iron core are both cylindrical, the static iron core is annular, the coil bracket, the moving iron core and the static iron core are all coaxially arranged, and the outer walls of the moving iron core and the static iron core are both close to the inner wall of the coil bracket.

[0011] Still further, the elastic member is a helical spring disposed around the push rod, and the helical spring, the push rod and the static iron core are all coaxially arranged.

[0012] Still further, annular limiting members are provided at both ends of the coil bracket.

[0013] Still further, a fixing hole is provided at the first end of the housing, a cylindrical bushing is fixed in the fixing hole, the inner diameter of the cylindrical bushing is smaller than the inner diameter of the coil bracket, the moving iron core includes a first cylindrical core and a second cylindrical core connected to the first cylindrical core, the first cylindrical core and the second cylindrical core are coaxially arranged, the push rod is disposed on the first cylindrical core, the diameter of the first cylindrical core is larger than the diameter of the second cylindrical core, the first cylindrical core is disposed in the coil bracket, and the second cylindrical core is disposed in the cylindrical bushing; the side surfaces of the first cylindrical core and the second cylindrical core form a stepped surface, and the stepped surface is blocked by the cylindrical bushing to limit the movement of the first cylindrical core in the direction away from the static iron core.

[0014] Still further, the cylindrical bushing includes an iron bushing and annular brass bushings provided at both ends of the iron bushing.

[0015] Further, both the opening electromagnet assembly and the closing electromagnet assembly are electrically connected to the integrated electromagnet circuit board through connectors.

[0016] Furthermore, it includes a protective housing, the integrated electromagnet circuit board is disposed in the protective housing, and an opening for the connector to pass through is provided on the protective housing.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging the integrated electromagnet circuit board outside the opening electromagnet assembly and the closing electromagnet assembly, the overall volume of the circuit boards controlling the opening electromagnet assembly and the closing electromagnet assembly is reduced, the volume of the iron core and the coil in the electromagnet assembly can be increased, and the maximum striking force of the electromagnet assembly can be improved. Moreover, the integration of the circuit boards controlling the opening electromagnet assembly and the closing electromagnet assembly helps to reduce costs. In addition, the separate design of the circuit board and the electromagnet assembly facilitates the separate maintenance of the circuit board and the electromagnet assembly. At the same time, the debris falling off due to vibration over time on the circuit board will not fall into the electromagnet assembly, effectively improving the reliability of the electromagnet assembly. Description of the Drawings

[0018] Figure 1 is a three-dimensional schematic diagram of the opening electromagnet assembly, the closing electromagnet assembly and the integrated electromagnet circuit board of the present utility model;

[0019] Figure 2 is a top view of the opening electromagnet assembly or the closing electromagnet assembly of the present utility model;

[0020] Figure 3 is Figure 2 a cross-sectional view of the A-A section in

[0021] In the figure:

[0022] 1 - opening electromagnet assembly; 2 - closing electromagnet assembly; 3 - housing; 4 - moving iron core; 4a - first cylindrical core; 4b - second cylindrical core; 5 - static iron core; 6 - push rod; 7 - coil bracket; 8 - coil bracket; 9 - limiting part; 10 - cylindrical bushing; 10a - iron bushing; 10b - brass bushing; 11 - connector; 12 - protective housing. Detailed Embodiments

[0023] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Such as Figure 1As shown in the figure, the utility model discloses an accessory for a frame circuit breaker, which includes a shunt trip solenoid assembly 1 for controlling the opening of the frame circuit breaker and a closing solenoid assembly 2 for controlling the closing of the frame circuit breaker. Both the shunt trip solenoid assembly 1 and the closing solenoid assembly 2 are used in the frame circuit breaker. Among them, the shunt trip solenoid assembly 1 is a component in the shunt trip release, and the closing solenoid assembly 2 is a component in the closing solenoid. The accessory for the frame circuit breaker of the utility model further includes an integrated solenoid circuit board for controlling the operation of the shunt trip solenoid assembly 1 and the closing solenoid assembly 2. Both the shunt trip solenoid assembly 1 and the closing solenoid assembly 2 are electrically connected to the integrated solenoid circuit board, and the integrated solenoid circuit board is arranged outside the shunt trip solenoid assembly 1 and the closing solenoid assembly 2. Specifically, the shunt trip solenoid assembly 1 and the closing solenoid assembly 2 are arranged adjacent to each other, the integrated solenoid circuit board is arranged outside the housing of the closing solenoid assembly 2, and the integrated solenoid circuit board is arranged outside the housing on the side of the shunt trip solenoid assembly 1 away from the closing solenoid assembly 2. For the accessory for the frame circuit breaker of the utility model, under the condition that the overall volume of the shunt trip release and the closing solenoid remains unchanged, by arranging the integrated solenoid circuit board outside the shunt trip solenoid assembly 1 and the closing solenoid assembly 2, the overall volume of the circuit board for controlling the shunt trip solenoid assembly 1 and the closing solenoid assembly 2 is reduced. Therefore, the volume of the iron core and the coil in the solenoid assembly can be increased, the maximum striking force of the solenoid assembly can be improved, and the selection range of the striking force of the solenoid assembly can be increased. At the same time, the integration of the circuit board for controlling the shunt trip solenoid assembly 1 and the closing solenoid assembly 2 helps to reduce costs. In addition, the separate design of the circuit board and the solenoid assembly facilitates the separate maintenance of the circuit board and the solenoid assembly. At the same time, the debris that may fall off the circuit board due to vibration over time will not fall into the solenoid assembly, effectively improving the reliability of the solenoid assembly.

[0027] In this embodiment, as Figure 2 and Figure 3 shown, the shunt trip solenoid assembly 1 and the closing solenoid assembly 2 have the same structure, and both include a housing 3, a moving iron core 4 arranged in the housing 3, a stationary iron core 5 arranged in the housing 3, and a push rod 6 arranged on the moving iron core 4. A through hole for the push rod 6 to pass through is provided on the stationary iron core 5. The housing is in the shape of a hexahedron with a hollow interior. One end of the moving iron core 4 is arranged close to the first end of the housing 3, and one end of the stationary iron core 5 is fixed on the second end of the housing 3. The first end and the second end are arranged opposite to each other. By defining the positions of the moving iron core 4 and the stationary iron core 5, the volume of the moving iron core 4 can be made as large as possible, and the maximum striking force of the solenoid assembly can be improved. In other embodiments, the stationary iron core 5 may not be provided, and the housing 3 and the moving iron core 4 are connected by a spring.

[0028] In this embodiment, as Figure 2 and Figure 3 shown, both the opening electromagnet assembly 1 and the closing electromagnet assembly 2 include elastic members, and both ends of the elastic member are respectively connected to the moving iron core 4 and the static iron core 5. Through the arrangement of the elastic member, after the moving iron core 4 is driven by the magnetic field to drive the push rod 6 to move, under the action of the elastic member, the moving iron core 4 can return to its original position. In other embodiments, both ends of the elastic member can also be arranged to connect the housing 3 and the moving iron core 4.

[0029] In this embodiment, as Figures 1 to 3 shown, both the opening electromagnet assembly 1 and the closing electromagnet assembly 2 include a coil bracket 7 arranged in the housing 3. The coil bracket 7 and the moving iron core 4 are both cylindrical, and the static iron core 5 is annular. The coil bracket 7, the moving iron core 4 and the static iron core 5 are all coaxially arranged. The outer walls of the moving iron core 4 and the static iron core 5 are both arranged close to the inner wall of the coil bracket 7, and the moving iron core 4 can move along the axis direction of the coil bracket 7 in the coil bracket 7. Through the arrangement of the coil bracket 7 in the present utility model, while facilitating the winding of the electromagnet coil, the movement direction of the moving iron core 4 is limited. In other embodiments, the shapes of the coil bracket 7 and the moving iron core 4 can also be cubic.

[0030] In this embodiment, as Figure 2 and Figure 3 shown, the elastic member is a spiral spring 8 arranged around the push rod 6. The spiral spring 8, the push rod 6 and the static iron core 5 are all coaxially arranged. By arranging the spiral spring 8 around the push rod 6 in the present utility model, the layout space in the housing 3 is effectively saved. In other embodiments, the elastic member can also be arranged outside the push rod 6.

[0031] In this embodiment, as Figure 2 and Figure 3 shown, annular limiting members 9 are provided at both ends of the coil bracket 7. Through the arrangement of the limiting members 9 in the present utility model, the coil wound on the coil bracket 7 is prevented from leaving the coil bracket 7. In other embodiments, a limiting block can also be arranged on the inner side of the housing 3. When the coil bracket 7 is assembled into the housing 3, the limiting block plays a role in restricting the coil from leaving the coil bracket 7.

[0032] In this embodiment, as Figure 2 and Figure 3As shown, a fixing hole is provided at the first end of the housing 3, and a cylindrical bushing 10 is fixed in the fixing hole. The inner diameter of the cylindrical bushing 10 is smaller than the inner diameter of the coil holder 7. The moving iron core 4 includes a first cylindrical core 4a and a second cylindrical core 4b connected to the first cylindrical core 4a. The first cylindrical core 4a and the second cylindrical core 4b are coaxially arranged, and the push rod 6 is arranged on the first cylindrical core 4a. The diameter of the first cylindrical core 4a is larger than the diameter of the second cylindrical core 4b. The first cylindrical core 4a is arranged in the coil holder 7, and the second cylindrical core 4b is arranged in the cylindrical bushing 10. The side surfaces of the first cylindrical core 4a and the second cylindrical core 4b are stepped surfaces, and the stepped surfaces are blocked by the cylindrical bushing 10 to limit the movement of the first cylindrical core 4a in the direction away from the static iron core 5. By providing the cylindrical bushing 10 and the stepped surface, the present utility model facilitates restricting the moving iron core 4 in the housing 3. In other embodiments, a stepped surface may also be provided on the cylindrical bushing 10 to limit the position of the moving iron core 4.

[0033] In this embodiment, as Figure 2 and Figure 3 shown, the cylindrical bushing 10 includes an iron bushing 10a and annular brass bushings 10b provided at both ends of the iron bushing 10a. Since the cylindrical bushing 10 is arranged between the electromagnet and the coil of the electromagnet assembly, the most ideal state of the cylindrical bushing 10 is to be made of a magnetic isolation material. Although plastic is a magnetic isolation material, compared with metal materials, the strength of plastic is lower and the reliability is poorer. Copper, as a good magnetic isolation material, has strong strength but is expensive. Although iron is a magnetic conductive material and also has strong strength, the price of iron is lower than that of copper. Therefore, in this embodiment, in order to reduce costs, part of the iron bushing 10a is used for the cylindrical bushing 10, and the manufacturing cost of the electromagnet assembly is reduced under the condition of having little influence on the impact force of the electromagnet assembly. In other embodiments, the cylindrical bushing 10 is integrally formed of copper material.

[0034] In this embodiment, as Figure 1 shown, both the opening electromagnet assembly 1 and the closing electromagnet assembly 2 are electrically connected to the integrated electromagnet circuit board through connectors 11. By providing the connectors 11, the present utility model facilitates disconnecting the connections between the opening electromagnet assembly 1, the closing electromagnet assembly 2, and the integrated electromagnet circuit board when separately overhauling the opening electromagnet assembly 1, the closing electromagnet assembly 2, or the integrated electromagnet circuit board. In other embodiments, the opening electromagnet assembly 1 and the closing electromagnet assembly 2 may also be welded to the integrated electromagnet circuit board.

[0035] In this embodiment, as Figure 1As shown in the figure, the frame circuit breaker of the present utility model further includes a protective housing 12. The integrated electromagnet circuit board is arranged inside the protective housing 12, and an opening for the connector to pass through is provided on the protective housing 12. Through the arrangement of the protective housing 12, the present utility model effectively prevents damage to the integrated electromagnet circuit board caused by the falling of other accessories in the frame circuit breaker. In other embodiments, the protective housing 12 may not be provided.

[0036] In summary, for the accessory of the frame circuit breaker of the present utility model, under the condition that the overall volume of the shunt trip and the closing electromagnet remains unchanged, by arranging the integrated electromagnet circuit board outside the shunt electromagnet assembly 1 and the closing electromagnet assembly 2, the total volume of the circuit boards controlling the shunt electromagnet assembly 1 and the closing electromagnet assembly 2 is reduced. Therefore, the volume of the iron core and the coil in the electromagnet assembly can be increased, the maximum striking force of the electromagnet assembly can be enhanced, and the selection range of the striking force of the electromagnet assembly can be enlarged. At the same time, the integration of the circuit boards controlling the shunt electromagnet assembly 1 and the closing electromagnet assembly 2 helps to reduce costs. In addition, the separate design of the circuit board and the electromagnet assembly facilitates the separate maintenance of the circuit board and the electromagnet assembly. Meanwhile, the debris falling off the circuit board due to vibration over time will not fall into the electromagnet assembly, effectively improving the reliability of the electromagnet assembly. By defining the positions of the moving iron core 4 and the static iron core 5, the volume of the moving iron core 4 can be made as large as possible, increasing the striking force of the electromagnet assembly. By defining the positions of the moving iron core 4 and the static iron core 5, the volume of the moving iron core 4 can be made as large as possible, enhancing the maximum striking force of the electromagnet assembly. Through the arrangement of the elastic member, after the moving iron core 4 is driven by the magnetic field to drive the push rod 6 to move, under the action of the elastic member, the moving iron core 4 can return to its original position. Through the arrangement of the coil bracket 7, it is convenient for winding the electromagnet coil and at the same time defines the movement direction of the moving iron core 4. By arranging the helical spring 8 around the push rod 6, the layout space inside the housing 3 can be effectively saved. Through the arrangement of the limiting member 9, the coil wound around the coil bracket 7 is prevented from leaving the coil bracket 7. Through the arrangement of the cylindrical shaft sleeve 10 and the stepped surface, it is convenient to limit the moving iron core 4 inside the housing 3. By using a part of the iron shaft sleeve 10a in the cylindrical shaft sleeve 10, the manufacturing cost of the electromagnet assembly can be reduced with less influence on the striking force of the electromagnet assembly. Through the arrangement of the connector 11, when separately overhauling the shunt electromagnet assembly 1, the closing electromagnet assembly 2 or the integrated electromagnet circuit board, the connection between the shunt electromagnet assembly 1, the closing electromagnet assembly 2 and the integrated electromagnet circuit board can be disconnected. Through the arrangement of the protective housing 12, the integrated electromagnet circuit board is effectively prevented from being damaged by the falling of other accessories in the frame circuit breaker.

[0037] It should be emphasized that the above is only the preferred embodiment of the present utility model, and it does not impose any form of limitation on the present utility model. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A frame-type circuit breaker accessory, comprising an opening electromagnet assembly (1) for controlling the opening of the frame-type circuit breaker and a closing electromagnet assembly (2) for controlling the closing of the frame-type circuit breaker, characterized in that: It also includes an integrated electromagnet circuit board for controlling the operation of the opening electromagnet assembly (1) and the closing electromagnet assembly (2); the opening electromagnet assembly (1) and the closing electromagnet assembly (2) are both electrically connected to the integrated electromagnet circuit board; and the integrated electromagnet circuit board is arranged on the outside of the opening electromagnet assembly (1) and the closing electromagnet assembly (2).

2. The frame-type circuit breaker accessory according to claim 1, characterized in that: The opening electromagnet assembly (1) and the closing electromagnet assembly (2) have the same structure, and both comprise a housing (3), a moving iron core (4) arranged in the housing (3), a stationary iron core (5) arranged in the housing (3), and a push rod (6) arranged on the moving iron core (4), wherein the stationary iron core (5) is provided with a through hole for the push rod (6) to pass through; one end of the moving iron core (4) is arranged close to the first end of the housing (3), and one end of the stationary iron core (5) is fixed to the second end of the housing (3), and the first end is arranged opposite to the second end.

3. The frame-type circuit breaker accessory according to claim 2, characterized in that: The opening electromagnet assembly (1) and the closing electromagnet assembly (2) both comprise an elastic member, and two ends of the elastic member are respectively connected to the moving iron core (4) and the static iron core (5).

4. The frame-type circuit breaker accessory according to claim 3, characterized in that: The opening electromagnet assembly (1) and the closing electromagnet assembly (2) both comprise a coil support (7) arranged in the housing (3); the coil support (7) and the moving iron core (4) are both cylindrical; the static iron core (5) is annular; the coil support (7), the moving iron core (4) and the static iron core (5) are all coaxially arranged; and the outer wall of the moving iron core (4) and the outer wall of the static iron core (5) are both arranged close to the inner wall of the coil support (7).

5. The frame-type circuit breaker accessory according to claim 4, characterized in that: The elastic member is a coil spring (8) arranged around the push rod (6); the coil spring (8), the push rod (6) and the static iron core (5) are all arranged coaxially.

6. The frame-type circuit breaker accessory according to claim 4, characterized in that: Both ends of the coil support (7) are provided with annular limiting members (9).

7. The frame-type circuit breaker accessory according to claim 4, characterized in that: A fixing hole is provided at the first end of the shell (3), a cylindrical sleeve (10) is fixed in the fixing hole, the inner diameter of the cylindrical sleeve (10) is smaller than the inner diameter of the coil support (7), the moving iron core (4) comprises a first cylindrical core (4a) and a second cylindrical core (4b) connected to the first cylindrical core (4a), the first cylindrical core (4a) and the second cylindrical core (4b) are coaxially arranged, the push rod (6) is arranged on the first cylindrical core (4a), the diameter of the first cylindrical core (4a) is larger than the diameter of the second cylindrical core (4b), the first cylindrical core (4a) is arranged in the coil support (7), and the second cylindrical core (4b) is arranged in the cylindrical sleeve (10); the side surfaces of the first cylindrical core (4a) and the second cylindrical core (4b) are step surfaces, the step surfaces are blocked by the cylindrical sleeve (10), and the first cylindrical core (4a) is restricted from moving in a direction away from the static iron core (5).

8. The frame-type circuit breaker accessory according to claim 7, characterized in that: The cylindrical shaft sleeve (10) comprises an iron shaft sleeve (10a) and annular brass shaft sleeves (10b) arranged at both ends of the iron shaft sleeve (10a).

9. The frame-type circuit breaker accessory according to claim 1, characterized in that: The opening electromagnet assembly (1) and the closing electromagnet assembly (2) are both electrically connected to the integrated electromagnet circuit board via a connector (11).

10. The frame-type circuit breaker accessory according to claim 9, characterized in that: It comprises a protective shell (12), the integrated electromagnet circuit board is arranged in the protective shell (12), and the protective shell (12) is provided with an opening for the connector to pass through.

Images