Adjustable backup protection breaker and surge protector

Abstract

The utility model relates to the field of surge protector equipment, in particular to an adjustable backup protection breaker and a surge protector. The utility model provides an adjustable backup protection breaker, which is used for backup protection of a surge protector body and comprises a release mechanism, a moving part and a breaking groove arranged on a lightning protection element loop, and the lightning protection element loop comprises a first section and a second section which are arranged on two sides of the breaking groove. The first section and the second section can get close to each other or get away from each other, so that the moving part can make contact with the first section and the second section at the same time, and the releasing mechanism is matched with the moving part. And the release mechanism can control the moving part to move to be separated from the breaking groove according to a signal of a mutual inductor sleeved on the lightning protection element loop.

Description

Technical Field

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

[0002] The function of a surge protector is to protect the line it is connected to. The surge protector is used in power circuits or communication lines. Its principle is to conduct and shunt the impact current through the internal varistor, thereby preventing the impact current from damaging the equipment on the power circuit or communication line. When the surge protector is used in daily life, the lightning protection element inside the surge protector will produce loss, which will increase the leakage current passing through the surge protector. When the leakage current caused by the loss reaches a certain level, the thermal trip mechanism in the surge protector will operate to cut off the leakage current. For larger power frequency currents, the surge protector body is connected in series with the fuse to achieve backup protection for the surge protector body. Existing fuses are generally for currents above 180A, while thermal trip mechanisms are generally for currents below 1A. There is a protection gap between them. When the leakage current is in this protection gap, the fuse cannot respond due to its rated current, and the thermal trip mechanism takes a certain amount of time to melt. At this time, the leakage current may cause the surge protector to burn in a very short time, so the thermal trip mechanism cannot respond in time.

[0003] Since existing fuses need to have the ability to resist surge current impacts, the rated current of the fuse element needs to reach a high level and cannot match the current size between the protection gaps. Therefore, existing fuses cannot achieve protection for smaller leakage currents by reducing the rated current of the fuse element. Utility Model Content

[0004] On the one hand, the utility model provides an arc breaker, which can increase the breaker's ability to respond to smaller leakage currents while ensuring the breaker's resistance to impact currents;

[0005] On the other hand, the utility model provides a surge protector.

[0006] The utility model provides an adjustable backup protection breaker, which is used for backup protection of a surge protector body, and includes a release mechanism, a moving part, and a disconnecting groove arranged on a lightning protection element circuit. The lightning protection element circuit includes a first section and a second section located on both sides of the disconnecting groove. The first section and the second section can approach or move away from each other so that the moving part can contact the first section and the second section at the same time. The release mechanism cooperates with the moving part, and the release mechanism can control the moving part to move away from the disconnecting groove according to a signal of a mutual inductor mounted on the lightning protection element circuit.

[0007] Furthermore, the second section includes a section body and an adjusting portion, the adjusting portion is slidably matched with the section body, and the adjusting portion can slide to be close to or away from the first section.

[0008] Furthermore, the adjustment part includes a locking nut, a moving electrode and a threaded part, a sliding hole is provided on the moving electrode, the segment body is slidingly matched with the moving electrode through the sliding hole, and the segment body is in contact with the inner wall surface of the sliding hole, the segment body is fixedly matched with the threaded segment, the locking nut is meshed with the threaded part, and the locking nut is against the moving electrode along the sliding direction of the moving electrode.

[0009] Furthermore, the segment body forms the threaded portion near the dividing groove, and the moving electrode is located between the threaded segment and the dividing groove.

[0010] Furthermore, in a direction perpendicular to the sliding direction of the movable electrode, the threaded portion and the segment body are spaced apart; in the sliding direction of the movable electrode, the movable electrode is located between the threaded segment and the dividing groove.

[0011] Furthermore, the adjustment part includes an adjustment spring and a moving electrode, a sliding hole is provided on the moving electrode, the segment body slides with the moving electrode through the sliding hole, and the segment body contacts the inner wall surface of the sliding hole, the adjustment spring is located between the moving electrode and the segment body, and the adjustment spring exerts a force on the moving electrode along the sliding direction of the moving electrode.

[0012] Furthermore, the first section has a first contact surface, the moving electrode has a second contact surface, the first contact surface and the second contact surface are arranged relative to each other to form the dividing groove, and the portion of the movable portion located between the first contact surface and the second contact surface is provided with a first fitting portion and a second fitting portion, the first fitting portion is abutted against the first contact surface, and the second fitting portion is abutted against the second contact surface.

[0013] Furthermore, the release mechanism includes a first spring and an electromagnetic release device for overcoming the elastic force of the first spring.

[0014] Furthermore, the moving part cooperates with the first spring and the action end of the electromagnetic release respectively, and the control end of the electromagnetic release is electrically connected to the secondary side of the mutual inductor.

[0015] The surge protector provided by the utility model comprises a lightning protection element, and the adjustable backup protection breaker as described in any one of the above items is arranged in series with the lightning protection element on the lightning protection element circuit.

[0016] Beneficial Effects

[0017] The disconnection energy when cooperating with the moving part in this scheme comes from the mechanical energy of the release mechanism. The release mechanism is used to fix and move the position of the moving part. When the lightning protection element circuit does not pass the leakage current or the leakage current passing through the lightning protection element circuit does not reach the rated value, it ensures that the moving part is located between the disconnecting slots, and the lightning protection element circuit is turned on. When the current flowing through the lightning protection element circuit reaches the rated value of the release mechanism, the release mechanism triggers the action of the moving part to disengage from the disconnecting slot, thereby realizing the disconnection of the lightning protection element circuit where the lightning protection element is located. Compared with traditional fuses, whose melting energy comes from the current flowing through the fuse, that is, the current flowing through the fuse core causes the fuse core to melt and disconnect the circuit, the moving part in this scheme is triggered by the release mechanism, and the triggering action of the release mechanism depends on the current value of the lightning protection element circuit monitored by the transformer. Therefore, the specific current value of the lightning protection element circuit can be disconnected by the predetermined triggering rated value of the release mechanism, and in order to ensure the reliability of the cooperation between the moving part and the lightning protection element circuit, the first section and the second section of the lightning protection element circuit can be close to or away from each other, thereby changing the slot width size of the disconnecting slot, so as to compensate for the errors during the assembly of the disconnector, as well as the processing errors of the first section, the second section and the moving part, to ensure that the moving part can contact the first section and the second section at the same time. 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 It is an overall schematic diagram of an adjustable backup protection breaker provided in the first embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the release mechanism of the adjustable backup protection breaker provided in the first embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the movable part of the adjustable backup protection breaker provided in the first embodiment of the utility model.

[0022] Figure numbers: 1-first section; 2-second section; 3-breaking slot; 4-adjusting part; 5-moving part; 6-releasing mechanism; 7-moving electrode; 8-locking nut; 9-transformer; 10-electromagnetic release; 11-section one body; 12-section two body; 13-section three body. 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] An adjustable backup protection breaker is used for backup protection of a surge protector body, comprising a release mechanism 6, a moving part 5 and a disconnecting slot 3 arranged on a lightning protection element circuit breaker, wherein the lightning protection element circuit breaker comprises a first section 1 and a second section 2 located on both sides of the disconnecting slot 3, wherein the first section 1 and the second section 2 can approach or move away from each other so that the moving part 5 can contact the first section 1 and the second section 2 at the same time, and the release mechanism 6 cooperates with the moving part 5, and the release mechanism 6 can control the moving part 5 to move away from the disconnecting slot 3 according to the signal of a mutual inductor 9 mounted on the lightning protection element circuit breaker.

[0026] The disconnection energy when cooperating with the moving part 5 in this scheme comes from the mechanical energy of the release mechanism 6. The release mechanism 6 is used to fix and move the position of the moving part 5. When the lightning protection element circuit does not pass the leakage current or the leakage current passed by the lightning protection element circuit does not reach the rated value, the moving part 5 is ensured to be located between the disconnecting grooves 3. Specifically, the lightning protection element circuit is provided with a disconnecting groove 3 at a corresponding position, and the two sides of the disconnecting groove 3 are respectively the first section 1 and the second section 2. The first section 1 and the second section 2 can be close to or away from each other, thereby changing the slot width size of the disconnecting groove 3, so as to compensate for the disconnection. The errors during assembly of the breaker and the processing errors among the first section 1, the second section 2 and the moving part 5 enable the moving part 5 to contact the first section 1 and the second section 2 at the same time, and the lightning protection element circuit is turned on. The triggering of the action of the release mechanism 6 is controlled by the current signal of the lightning protection element circuit. The release mechanism 6 can collect the current signal of the lightning protection element circuit through the mutual inductor 9. When the current flowing through the lightning protection element circuit reaches the rated value of the release mechanism 6, the release mechanism 6 triggers the action of the moving part 5 to disengage from the disconnecting slot 3, thereby realizing the disconnection of the lightning protection element circuit where the lightning protection element is located.

[0027] Compared with traditional fuses, whose melting energy comes from the current flowing through the fuse, that is, the current flowing through the fuse core causes the fuse core to melt and disconnect the circuit, the moving part 5 in this scheme is triggered by the release mechanism 6, and the triggering action of the release mechanism 6 depends on the current value of the lightning protection element circuit monitored by the mutual inductor 9. Therefore, the specific current value of the lightning protection element circuit can be disconnected by pre-setting the triggering rated value of the release mechanism 6, that is, the disconnection condition of the circuit breaker in this scheme is controllable, avoiding the contradiction between the heat generated by the fuse core, the rated current of the fuse core melting and its impact resistance current caused by the traditional scheme relying on the heat generated by the fuse core itself.

[0028] In an optional embodiment, the second section 2 includes a section body and an adjusting portion 4 , the adjusting portion 4 is slidably matched with the section body, and the adjusting portion 4 can slide to be close to or away from the first section 1 .

[0029] The function of the segment body is to conduct electricity and provide support. The segment body and the first segment 1 are relatively fixed in position. The adjusting part 4 is arranged on the segment body, is electrically connected to the segment body, and can move relative to the segment body. A disconnecting groove 3 is formed between the adjusting part 4 and the first segment 1. When the moving part 5 is located in the disconnecting groove 3, the moving part 5 can contact the first segment 1 and the adjusting part 4 at the same time, so that the lightning protection element circuit is turned on. The slot width of the disconnecting groove 3 is changed by sliding the adjusting part 4, and the first segment 1 remains fixed in position. When adjusting, the operator only needs to operate the second segment 2, which reduces the number of active structures and improves the structural reliability of the adjustable backup protection breaker.

[0030] In an optional embodiment, the adjusting portion 4 includes a locking nut 8, a moving electrode 7 and a threaded portion, a sliding hole is provided on the moving electrode 7, the segment body is slidingly matched with the moving electrode 7 through the sliding hole, and the segment body is in contact with the inner wall surface of the sliding hole, the segment body is fixedly matched with the threaded segment, the locking nut 8 is meshed with the threaded portion, and the locking nut 8 is against the moving electrode 7 along the sliding direction of the moving electrode 7.

[0031] The locking nut 8 abuts against the moving electrode 7, generating a force on the moving electrode 7 in the direction of the dividing groove 3, so that the moving electrode 7 can have a maximum spacing with the end of the first segment 1 to match the moving part 5. The moving electrode 7 is provided with a sliding hole, and the segment body passes through the sliding hole, so that the moving electrode 7 can slide relative to the segment body. When the moving electrode 7 slides toward the first segment 1, the size of the dividing groove 3 decreases, and when the moving electrode 7 slides away from the first segment 1, the size of the dividing groove 3 increases. The segment body keeps in contact with the inner wall of the sliding hole, and the moving electrode 7 is always electrically connected to the segment body.

[0032] The threaded portion is arranged parallel to the segment body, and the locking nut 8 is meshed with the threaded portion. The threaded portion and the locking nut 8 can achieve self-locking of the thread, that is, the moving electrode 7 cannot push the locking nut 8. When the dividing groove 3 needs to be adjusted, the locking nut 8 is rotated to make it close to or away from the first segment 1. The moving electrode 7 is located between the locking nut 8 and the first segment 1, and is constrained by the locking nut 8. It cannot continue to slide on the segment body in the direction away from the first segment 1. When the locking nut 8 reaches the predetermined position, the moving electrode 7 is abutted against the locking nut 8. At this time, the dividing groove 3 between the moving electrode 7 and the first segment 1 can just cooperate with the moving portion 5. One side of the moving portion 5 is abutted against the end of the first segment 1, and the other side is abutted against the moving electrode 7. The moving electrode 7 is clamped by the moving portion 5 and the locking nut 8 to keep its position relatively fixed.

[0033] Alternatively, there is a flexible electrical connection structure between the movable electrode 7 and the segment body, such as a wire, and the movable electrode 7 and the segment body are slidably matched by the segment body passing through the sliding hole, and the electrical connection between the two is achieved during the sliding process through the flexible deformation of the wire.

[0034] In an optional embodiment, a threaded portion is formed on the segment body near the dividing groove 3 , and the moving electrode 7 is located between the threaded segment and the dividing groove 3 .

[0035] The segment body has a segment one body 11, a segment two body 12 and a segment three body 13 along the axial direction. The segment one body 11 is located close to the first segment 1, the segment three body 13 is located away from the first segment 1, the segment two body 12 is located between the segment one body 11 and the segment three body 13, and the segment three body 13 is connected to the shell or other supporting parts of the adjustable backup protection disconnector, so as to support the segment body, the moving electrode 7 and the locking nut 8. The segment two body 12 is provided with a thread to form a threaded portion, where the locking nut 8 is located, and the moving electrode 7 is located at the segment one body 11.

[0036] In an optional embodiment, the first section 1 has a first contact surface, the moving electrode 7 has a second contact surface, the first contact surface and the second contact surface are arranged relative to each other to form a dividing groove 3, and the portion of the movable portion 5 located between the first contact surface and the second contact surface is provided with a first fitting portion and a second fitting portion, the first fitting portion is against the first contact surface, and the second fitting portion is against the second contact surface.

[0037] The end of the copper sheet where the lightning protection element loop is located forms a first contact surface and a second contact surface, and a dividing groove 3 is formed between the first contact surface and the second contact surface. A first fitting portion is provided at a position on the moving part 5 that cooperates with the first contact surface, and a second fitting portion is provided at a position that cooperates with the second contact surface. When the moving part 5 is located in the dividing groove 3, the first fitting portion is in contact with the first contact surface, and the second fitting portion is in contact with the second contact surface. Both the first contact surface and the second contact surface are parallel to the sliding direction of the moving part 5, so that when the moving part 5 slides, the first fitting portion continues to maintain contact with the first contact surface and slides relative to each other, and the second fitting portion continues to maintain contact with the second contact surface and slides relative to each other.

[0038] In an optional embodiment, the adjustable backup protection breaker further includes an arc extinguishing chamber, which is located close to the breaking slot 3. When the moving part 5 is separated from the breaking slot 3, the moving contact moves into the arc extinguishing chamber.

[0039] The arc extinguishing chamber is located at the disconnection point between the moving part 5 and the disconnecting slot 3. Sand is filled in the arc extinguishing chamber. When the moving part 5 is detached, the moving part 5 moves into the arc extinguishing chamber, and the sand flows into the gap between the moving part 5 and the disconnecting slot 3, thereby playing the role of arc extinguishing.

[0040] In an optional embodiment, the release mechanism 6 includes a first spring and an electromagnetic release 10 for overcoming the elastic force of the first spring.

[0041] The disconnecting energy of the breaker comes from the mechanical energy of the first spring. The electromagnetic release 10 is used to fix the position of the moving part 5 to ensure that the moving part 5 is located in the disconnecting slot 3, so that the lightning protection element circuit is turned on. The triggering of the action of the electromagnetic release 10 is controlled by the mutual inductor 9. When the current flowing through the lightning protection element circuit reaches the rated value of the electromagnetic release 10, the electromagnetic release 10 triggers the action of disengaging from the moving part 5, so that the moving part 5 moves under the elastic force of the first spring.

[0042] In an optional implementation, the moving part 5 cooperates with the first spring and the action end of the electromagnetic release 10 respectively, and the control end of the electromagnetic release 10 is electrically connected to the secondary side of the mutual inductor 9 .

[0043] The secondary side of the mutual inductor 9 in this solution is electrically connected to the coil of the control side of the electromagnetic release 10. The current generated by the secondary side of the mutual inductor 9 causes the control side of the electromagnetic release 10 to generate magnetic force, thereby driving the action side to move.

[0044] Alternatively, the coil on the control side of the electromagnetic release 10 is electrically connected to an external power supply or a lightning protection element circuit through a control circuit. A control switch is provided on the control circuit. The secondary side of the mutual inductor 9 is connected to the control switch for controlling the on and off of the control switch. The control side of the electromagnetic release 10 generates magnetic force through the current in the control circuit and thereby drives the action side to move.

[0045] The utility model provides a surge protector, which comprises a lightning protection element. An adjustable backup protection breaker and the lightning protection element are arranged in series on a lightning protection element circuit.

[0046] Embodiment 2

[0047] In an optional embodiment, the adjusting part 4 includes an adjusting spring and a moving electrode 7, a sliding hole is provided on the moving electrode 7, the segment body slides with the moving electrode 7 through the sliding hole, and the segment body contacts the inner wall surface of the sliding hole, the adjusting spring is located between the moving electrode 7 and the segment body, and the adjusting spring exerts a force on the moving electrode 7 along the sliding direction of the moving electrode 7.

[0048] The adjustment spring generates a force on the movable electrode 7 in the direction of the dividing groove 3, so that the movable electrode 7 can abut against the end of the first segment 1 or the distance between the movable electrode 7 and the end of the first segment 1 is smaller than the size of the moving part 5. A sliding hole is provided on the movable electrode 7, and the segment body passes through the sliding hole, so that the movable electrode 7 can slide relative to the segment body. When the movable electrode 7 slides toward the first segment 1, the size of the dividing groove 3 decreases, and when the movable electrode 7 slides away from the first segment 1, the size of the dividing groove 3 increases. The segment body keeps in contact with the inner wall of the sliding hole, and the movable electrode 7 is always electrically connected to the segment body.

[0049] When the moving part 5 is located in the dividing groove 3 between the moving electrode 7 and the first section 1, under the action of the adjusting spring, the moving electrode 7 and the end of the first section 1 clamp the moving part 5. When the size of the moving part 5 is deviated, due to the elastic force of the adjusting spring, the first fitting part on one side of the moving part 5 always abuts against the first contact surface at the end of the first section 1, and the two fitting parts on the other side of the moving part 5 abut against the second contact surface at the end of the first section 1. At this time, the adjusting spring is in an elastic deformation state. When the moving part 5 is separated from the dividing groove 3, the moving electrode 7 moves to abut against the end of the first section 1, i.e., the first contact surface, or moves to a distance between its first fitting part and the first contact surface is reduced under the action of the adjusting spring.

[0050] Embodiment 3

[0051] In an optional embodiment, in a direction perpendicular to the sliding direction of the movable electrode 7 , the threaded portion and the segment body are spaced apart; in the sliding direction of the movable electrode 7 , the movable electrode 7 is located between the threaded segment and the dividing groove 3 .

[0052] 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.

[0053] 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. An adjustable backup protection breaker for backup protection of a surge protector body, characterized in that: The invention comprises a release mechanism (6), a moving part (5) and a disconnecting groove (3) arranged on a lightning protection element circuit, wherein the lightning protection element circuit comprises a first section (1) and a second section (2) located on both sides of the disconnecting groove (3), wherein the first section (1) and the second section (2) can be moved closer to or farther from each other so that the moving part (5) can contact the first section (1) and the second section (2) at the same time, and the release mechanism (6) cooperates with the moving part (5), and the release mechanism (6) can control the moving part (5) to move to be separated from the disconnecting groove (3) according to a signal of a mutual inductor (9) sleeved on the lightning protection element circuit.

2. The adjustable backup protection breaker according to claim 1, characterized in that: The second section (2) comprises a section body and an adjusting portion (4), wherein the adjusting portion (4) is slidably matched with the section body, and the adjusting portion (4) can slide to be close to or away from the first section (1).

3. The adjustable backup protection breaker according to claim 2, characterized in that: The adjusting portion (4) comprises a locking nut (8), a moving electrode (7) and a threaded portion, a sliding hole is provided on the moving electrode (7), the segment body is slidably matched with the moving electrode (7) through the sliding hole, and the segment body is in contact with the inner wall surface of the sliding hole, the segment body is fixedly matched with the threaded segment, the locking nut (8) is meshed with the threaded portion, and the locking nut (8) is against the moving electrode (7) along the sliding direction of the moving electrode (7).

4. The adjustable backup protection breaker according to claim 3 is characterized in that: The segment body forms the threaded portion near the dividing groove (3), and the moving electrode (7) is located between the threaded segment and the dividing groove (3).

5. The adjustable backup protection breaker according to claim 3, characterized in that: In a direction perpendicular to the sliding direction of the movable electrode (7), the threaded portion and the segment body are spaced apart; in the sliding direction of the movable electrode (7), the movable electrode (7) is located between the threaded segment and the separating groove (3).

6. The adjustable backup protection breaker according to claim 3, characterized in that: The adjusting portion (4) comprises an adjusting spring and a moving electrode (7); the adjusting spring is located between the moving electrode (7) and the segment body; the adjusting spring generates a force on the moving electrode (7) along a sliding direction of the moving electrode (7).

7. The adjustable backup protection breaker according to claim 4 or 5, characterized in that: The first section (1) has a first contact surface, the movable electrode (7) has a second contact surface, the first contact surface and the second contact surface are arranged relative to each other to form the dividing groove (3), and the portion of the movable portion (5) located between the first contact surface and the second contact surface is provided with a first fitting portion and a second fitting portion, the first fitting portion is against the first contact surface, and the second fitting portion is against the second contact surface.

8. The adjustable backup protection breaker according to claim 1, characterized in that: The release mechanism (6) comprises a first spring and an electromagnetic release (10) for overcoming the elastic force of the first spring.

9. The adjustable backup protection breaker according to claim 8, characterized in that: The moving part (5) cooperates with the first spring and the action end of the electromagnetic release (10) respectively, and the control end of the electromagnetic release (10) is electrically connected to the secondary side of the mutual inductor (9).

10. A surge protector, comprising a lightning protection element, characterized in that: The adjustable backup protection breaker as described in any one of claims 1 to 7 is arranged in series with the lightning protection element on the lightning protection element circuit.

Images