Backup protection breaker trigger structure and surge protector

Abstract

The utility model relates to the field of surge protector equipment, and in particular to a backup protection breaker trigger structure and a surge protector. The backup protection breaker trigger structure provided by the utility model includes an iron block, a shunt cable and an armature, the shunt cable is connected to the main circuit, the shunt cable is matched with the armature, the iron block is spaced and matched with one end of the armature, and the armature or the iron block is connected to a disconnection component. The space occupied by the structure for realizing the active disconnection function in the surge protector can be reduced, so as to promote the miniaturization of the product.

Description

Technical Field

[0001] The utility model relates to the field of surge protector equipment, in particular to a backup protection breaker trigger structure and a surge protector. Background Art

[0002] In order to realize the active disconnection function of the backup protection breaker of the surge protector, a current transformer is now set on the main circuit where the lightning protection element of the surge protector is located, and the electromagnetic release is controlled by the current transformer to move, thereby triggering the movement of the moving contact of the interval structure set on the main circuit, so as to disconnect the main circuit. For products with a backup protection breaker integrated in the surge protector, the electromagnetic release and the current transformer occupy a large space in the surge protector, which is not conducive to the miniaturization of the product. Utility Model Content

[0003] On the one hand, the utility model provides a backup protection breaker trigger structure, which can reduce the space occupied by the structure realizing the active disconnection function in the surge protector, so as to promote the miniaturization of the product;

[0004] On the other hand, the utility model provides a surge protector.

[0005] The backup protection breaker trigger structure provided by the utility model comprises an iron block, a shunt cable and an armature, wherein the shunt cable is connected to the main circuit, the shunt cable cooperates with the armature, the iron block cooperates with one end of the armature at intervals, and the armature or the iron block is connected to the disconnecting assembly.

[0006] Furthermore, the armature and the shunt cable are slidably matched.

[0007] Furthermore, the armature is fixedly matched with the shunt cable.

[0008] Furthermore, the disconnecting assembly includes a first release member, a first spring and a moving part, the armature is connected to the first release member along a first direction, the moving part cooperates with the first spring along a second direction, the first release member cooperates with the moving part along a direction opposite to the second direction, and the first direction is perpendicular to the second direction.

[0009] Further, the disconnecting assembly includes a first release member, a second release member, a first spring, a second spring and a moving part, the armature cooperates with the second release member along the second direction, the first release member cooperates with the first spring along the first direction, the second release member cooperates with the first release member in a direction opposite to the first direction, the moving part cooperates with the second spring along the second direction, the first release member cooperates with the moving part in a direction opposite to the second direction, and the first direction is perpendicular to the second direction.

[0010] Furthermore, a shock-absorbing spring is provided between the armature and the first release member.

[0011] Furthermore, a shock absorbing spring is provided between the armature and the second release member.

[0012] Furthermore, the shunt cable includes a spiral section and connecting sections located at both ends of the spiral section, the connecting section is connected to the conductive structure where the main circuit is located, the spiral section is sleeved outside the armature, and the spiral section and the armature are insulated and matched.

[0013] Furthermore, an insulating layer is provided between the spiral segment and the armature.

[0014] The surge protector provided by the utility model comprises a lightning protection element, and the lightning protection element is located on the main circuit in the trigger structure of the backup protection breaker as described in any one of the above items.

[0015] Beneficial Effects

[0016] The backup protection breaker trigger structure in this scheme is composed of an iron block, a shunt cable and an armature. When a large short-circuit current flows through the main circuit, part of the current flows through the shunt cable. The magnetic field generated by the current in the shunt cable magnetizes the armature, so that a magnetic force is generated between the armature and the iron block, thereby causing the armature or the iron block to move. The movement of the armature or the iron block triggers the movement of the moving contact in the disconnecting assembly, thereby disconnecting the main circuit.

[0017] Compared with the existing current transformer and electromagnetic release as triggering mechanism, the iron block, shunt cable and armature in this scheme cooperate to trigger the disconnecting assembly, and the structure is relatively simple, so that the triggering structure of the backup protection breaker occupies a smaller space of the surge protector, so as to facilitate the miniaturization of the surge protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the trigger structure of the backup protection breaker provided in the first embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the disconnecting assembly provided in the third embodiment of the present utility model;

[0021] Figure 3This is a schematic diagram of the coordination between the shunt cable and the armature provided in the first embodiment of the utility model;

[0022] Figure numbers: 1-main circuit; 2-shunt cable; 3-armature; 4-iron block; 5-first release piece; 6-moving part; 7-shock-absorbing spring; 8-second release piece; 9-first spring; 10-second spring; 11-connecting section; 12-spiral section. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0024] Embodiment 1

[0025] like Figure 1 and Figure 3 A backup protection breaker trigger structure shown includes an iron block 4, a shunt cable 2 and an armature 3, the shunt cable 2 is connected to the main circuit 1, the shunt cable 2 cooperates with the armature 3, the iron block 4 is spaced apart from one end of the armature 3, and the armature 3 or the iron block 4 is connected to the disconnecting assembly.

[0026] In order to realize the active disconnection function of the backup protection breaker of the surge protector, a current transformer is now arranged on the main circuit 1 where the lightning protection element of the surge protector is located, and the electromagnetic release is controlled by the current transformer to move, thereby triggering the movement of the moving contact of the spacing structure arranged on the main circuit 1, so that the main circuit 1 is disconnected. For products with a backup protection breaker integrated in the surge protector, the electromagnetic release and the current transformer occupy a large space in the surge protector, which is not conducive to the miniaturization of the product. To solve the above problem, the backup protection breaker trigger structure in this scheme is composed of an iron block 4, a shunt cable 2 and an armature 3. When a large short-circuit current flows through the main circuit 1, a part of the current flows through the shunt cable 2. The magnetic field generated by the current in the shunt cable 2 magnetizes the armature 3, so that a magnetic force is generated between the armature 3 and the iron block 4, so that the armature 3 or the iron block 4 moves, and the movement of the armature 3 or the iron block 4 triggers the movement of the moving contact in the disconnecting component, so that the main circuit 1 is disconnected.

[0027] Compared with the existing current transformers and electromagnetic releases as triggering mechanisms, the iron block 4, shunt cable 2 and armature 3 in this scheme cooperate with the triggering and disconnecting components, and the structure is relatively simple, so that the backup protection breaker triggering structure occupies a smaller space of the surge protector, so as to facilitate the miniaturization of the surge protector.

[0028] In an optional embodiment, the armature 3 and the shunt cable 2 are slidably fitted.

[0029] The relative positions of the iron block 4 and the shunt cable 2 in the surge protector are fixed, and the armature 3 slides relative to the shunt cable 2. When current flows through the shunt cable 2, the magnetic field generated by the current in the shunt cable 2 magnetizes the armature 3, so that a magnetic force is generated between the armature 3 and the iron block 4. The movement of the armature 3 triggers the movement of the moving contact in the disconnecting assembly, thereby disconnecting the main circuit 1.

[0030] In an optional embodiment, the disconnecting assembly includes a first release member 5, a first spring 9 and a movable portion 6, the armature 3 is connected to the first release member 5 along a first direction, the movable portion 6 cooperates with the first spring 9 along a second direction, the first release member 5 cooperates with the movable portion 6 along a direction opposite to the second direction, and the first direction is perpendicular to the second direction.

[0031] The moving part 6 in this solution can move along the second direction, the first release member 5 cooperates with the moving part 6 along the direction opposite to the second direction, restricting the moving part 6 from moving along the second direction until it is separated from the spacing structure, and the first release member 5 moves along the first direction, and the first direction is perpendicular to the second direction. Since the cooperation direction between the first release member 5 and the moving part 6 is perpendicular to the movement direction of the first release member 5, it can be ensured that before the first release member 5 moves to be separated from the moving part 6, the first release member 5 does not have any displacement in the second direction, so that the moving part 6 does not move along the second direction, avoiding the situation where the first release member 5 and the moving part 6 have a secondary cooperation during their respective movements, thereby causing the cooperation to be stuck.

[0032] When current does not flow through the shunt cable 2, the first release member 5 cooperates with the movable part 6, so that the movable part 6 remains in a state of cooperation with the spacing structure, and the first spring 9 maintains elastic deformation; when current flows through the shunt cable 2, the armature 3 drives the first release member 5 to move along the first direction until it is disengaged from the movable part 6, and the movable part 6 moves along the second direction under the action of the first spring 9 until it is disengaged from the spacing structure.

[0033] In an optional embodiment, a damping spring 7 is provided between the armature 3 and the first release member 5 .

[0034] One end of the shock absorbing spring 7 is connected to the armature 3, and the other end is connected to the first release member 5. The first release member 5 has damping along the first direction. Specifically, there is friction between the first release member 5 and the moving part 6. When a small current flows through the shunt cable 2, the small moving force of the armature 3 along the first direction causes the shock absorbing spring 7 to undergo a certain degree of elastic deformation. The elastic force generated by the elastic deformation cannot drive the first release member 5 to move away from the moving part 6. The backup protection breaker of the surge protector has a preset disconnection threshold. When the current reaches the disconnection threshold, the magnetic field force generated by the current flowing through the shunt cable 2 causes the armature 3 to have a large moving force along the first direction, stretching the shock absorbing spring 7 to a certain degree of elastic deformation, thereby driving the first release member 5 to move away from the moving part 6.

[0035] In an optional embodiment, the shunt cable 2 includes a spiral section 12 and connecting sections 11 located at both ends of the spiral section 12, the connecting section 11 is connected to the conductive structure where the main circuit 1 is located, the spiral section 12 is sleeved outside the armature 3, and the spiral section 12 and the armature 3 are insulated.

[0036] The conductive structure of the main circuit 1 is a copper part, etc. The two ends of the shunt cable 2 are respectively connected to the copper parts, and a spiral section 12 is formed in the middle. The armature 3 passes through the spiral section 12, and there is a gap or insulation layer between the shunt cable 2 and the spiral section 12.

[0037] In an optional embodiment, an insulating layer is provided between the spiral segment 12 and the armature 3 .

[0038] The surge protector provided by the utility model comprises a lightning protection element, and the lightning protection element is located on the main circuit 1 in the trigger structure of the backup protection breaker as described in any one of the above items.

[0039] Embodiment 2

[0040] In an optional embodiment, the armature is fixedly matched with the shunt cable.

[0041] The relative positions of the iron block and the shunt cable in the surge protector are fixed. The flexible structures at both ends of the shunt cable are connected to the copper parts respectively, and a spiral section is formed in the middle. The spiral section fits the surface of the armature, and an insulating layer is provided between the two. When the current flows through the shunt cable, the magnetic field generated by the current in the shunt cable magnetizes the armature, so that a magnetic force is generated between the armature and the iron block. The armature drives the threaded section to move, triggering the movement of the moving contact in the disconnecting assembly, thereby disconnecting the main circuit.

[0042] Embodiment 3

[0043] like Figure 3The disconnecting assembly shown includes a first release member 5, a second release member 8, a first spring 9, a second spring 10 and a moving portion 6, the armature 3 cooperates with the second release member 8 along the second direction, the first release member 5 cooperates with the first spring 9 along the first direction, the second release member 8 cooperates with the first release member 5 in a direction opposite to the first direction, the moving portion 6 cooperates with the second spring 10 along the second direction, the first release member 5 cooperates with the moving portion 6 in a direction opposite to the second direction, and the first direction is perpendicular to the second direction.

[0044] The moving part 6 in this solution can move along the second direction, the first release member 5 cooperates with the moving part 6 in the direction opposite to the second direction, restricting the moving part 6 from moving along the second direction to disengage from the spacing structure, the first release member 5 moves along the first direction to disengage from the moving part 6, the second release member 8 cooperates with the first release member 5 in the direction opposite to the first direction, restricting the first release member 5 from moving along the first direction to disengage from the moving part 6, and the second release member 8 moves along the second direction to disengage from the first direction. The first direction is perpendicular to the second direction. The moving part 6 needs to be able to detach from the spacing structure, so the force of the second spring 10 used to drive the moving part 6 is relatively large, and the pressure and friction resistance between the first release member 5 that blocks the moving part 6 and the moving part 6 are relatively large. If the first release member 5 is directly performed by the armature 3, high requirements are required for the moving force of the armature 3. This solution utilizes the second release member 8 and the second spring 10 to control the position of the first release member 5. The friction resistance between the second release member 8 and the first release member 5 is relatively small, so the moving force of the armature 3 can be reduced, thereby reducing the requirements for the current flowing through the shunt cable 2, thereby facilitating the improvement of the controllability of the disconnection conditions.

[0045] When the current does not flow through the shunt cable 2, the second release piece 8 is inserted into the corresponding structure of the first release piece 5 along the second direction, thereby limiting the first release piece 5 from moving along the first direction until it is disengaged from the moving part 6. At this time, the moving part 6 cooperates with the spacing structure, and the lightning protection element circuit remains in a conductive state. The second spring 10 for driving the moving part 6 to move and the first spring 9 for driving the first release piece 5 are in an elastic deformation state; when the current flows through the shunt cable 2, the armature 3 drives the second release piece 8 to move along the second direction until it is disengaged from the first release piece 5. The first release piece 5 moves along the first direction until it is disengaged from the moving part 6 under the action of the first spring 9. The moving part 6 moves along the second direction until it is disengaged from the spacing structure under the action of the second spring 10.

[0046] In an optional embodiment, a damping spring 7 is provided between the armature 3 and the second release member 8 .

[0047] One end of the shock absorbing spring 7 is connected to the armature 3, and the other end is connected to the second release member 8. The second release member 8 has damping along the first direction. Specifically, there is friction between the second release member 8 and the moving part 6. When a small current flows through the shunt cable 2, the small moving force of the armature 3 along the first direction causes the shock absorbing spring 7 to undergo a certain degree of elastic deformation. The elastic force generated by the elastic deformation cannot drive the second release member 8 to move to be separated from the first release member 5. The backup protection breaker of the surge protector has a preset disconnection threshold. When the current reaches the disconnection threshold, the magnetic field force generated by the current flowing through the shunt cable 2 causes the armature 3 to have a large moving force along the first direction, stretching the shock absorbing spring 7 to a certain degree of elastic deformation, thereby driving the second release member 8 to move to be separated from the first release member 5.

[0048] It should be noted that any of the above embodiments is illustrative of the present invention rather than limiting the present invention, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words primary, secondary, previous, and next, etc. does not indicate any order. These words may be interpreted as names.

[0049] The above implementation modes are only suitable for illustrating the present invention, but not for limiting the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The scope of patent protection of the present invention should be limited by the claims.

Claims

1. A backup protection breaker triggering structure, characterized in that: It comprises an iron block (4), a shunt cable (2) and an armature (3), wherein the shunt cable (2) is connected to a main circuit (1), the shunt cable (2) cooperates with the armature (3), the iron block (4) cooperates with one end of the armature (3) at a distance, and the armature (3) or the iron block (4) is connected to a disconnecting component.

2. The backup protection breaker triggering structure according to claim 1, characterized in that: The armature (3) and the shunt cable (2) are slidably matched.

3. The backup protection breaker triggering structure according to claim 1, characterized in that: The armature (3) and the shunt cable (2) are fixedly matched.

4. The backup protection breaker triggering structure according to claim 2 or 3, characterized in that: The disconnecting assembly comprises a first release member (5), a first spring (9) and a moving part (6); the armature (3) is connected to the first release member (5) along a first direction; the moving part (6) cooperates with the first spring (9) along a second direction; the first release member (5) cooperates with the moving part (6) in a direction opposite to the second direction; and the first direction is perpendicular to the second direction.

5. The backup protection breaker triggering structure according to claim 2 or 3, characterized in that: The disconnecting assembly comprises a first release member (5), a second release member (8), a first spring (9), a second spring (10) and a moving portion (6); the armature (3) cooperates with the second release member (8) along a second direction; the first release member (5) cooperates with the first spring (9) along a first direction; the second release member (8) cooperates with the first release member (5) in a direction opposite to the first direction; the moving portion (6) cooperates with the second spring (10) in the second direction; the first release member (5) cooperates with the moving portion (6) in a direction opposite to the second direction; and the first direction is perpendicular to the second direction.

6. The backup protection breaker triggering structure according to claim 4, characterized in that: A shock absorbing spring (7) is provided between the armature (3) and the first release member (5).

7. The backup protection breaker triggering structure according to claim 5, characterized in that: A damping spring (7) is provided between the armature (3) and the second release member (8).

8. The backup protection breaker triggering structure according to claim 2 or 3, characterized in that: The shunt cable (2) comprises a spiral section (12) and connecting sections (11) located at both ends of the spiral section (12), the connecting section (11) being connected to a conductive structure where the main circuit (1) is located, the spiral section (12) being sleeved outside the armature (3), and the spiral section (12) and the armature (3) being insulated from each other.

9. The backup protection breaker triggering structure according to claim 8, characterized in that: An insulating layer is provided between the spiral segment (12) and the armature (3).

10. A surge protector, comprising a lightning protection element, characterized in that: The lightning protection element is located on the main circuit (1) in the backup protection breaker triggering structure as described in any one of claims 1 to 9.

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