Surge current signal output device and surge protector

Abstract

The utility model relates to the field of surge protector equipment, in particular to a surge current signal output device and a surge protector. The surge current signal output device provided by the utility model is used for a surge protector, and comprises a first pull-in piece, a second pull-in piece and a copper bar located on a grounding circuit, the first pull-in piece is fixedly arranged relative to the copper bar, a support spring is arranged between the first pull-in piece and the second pull-in piece, and the first pull-in piece and the second pull-in piece are fixedly connected through the support spring. The first attraction piece and the second attraction piece are arranged around the copper bar, so that the second attraction piece can be close to the first attraction piece under the action of a magnetic field generated by current flowing through the copper bar, and the second attraction piece is matched with a displacement detection assembly.

Description

Technical Field

[0001] The utility model relates to the field of surge protector equipment, in particular to a surge current signal output device and a surge protector. Background Art

[0002] The function of a surge protector is to protect the lines 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 lightning protection element, thereby preventing the impact current from damaging the equipment on the power circuit or communication line. In order to monitor the status of the surge protector and understand the situation of the surge current flowing through the surge protector, a temperature sensor is provided near the lightning protection element in the existing surge protector. When the surge current flows through the lightning protection element, the temperature of the lightning protection element rises. The temperature sensor monitors the temperature change of the lightning protection element and converts the analog signal of the temperature sensor into a digital electrical signal output through the circuit, thereby realizing the monitoring of the surge current flowing through the copper busbar.

[0003] The disadvantage of existing temperature monitoring is that in addition to the lightning protection components corresponding to the temperature sensor, there are other heat sources in the environment where the surge protector is located, such as the temperature generated when the surge current passes through the lightning protection components in adjacent surge protectors of multiple parallel surge protectors. Therefore, the existing temperature monitoring is prone to false alarms. Utility Model Content

[0004] On the one hand, the utility model provides a surge current signal output device, which can improve the accuracy of surge current monitoring;

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

[0006] The surge current signal output device provided by the utility model is used for a surge protector, and includes a first suction component, a second suction component and a copper busbar located on a grounding circuit, wherein the first suction component is fixedly arranged relative to the copper busbar, a supporting spring is arranged between the first suction component and the second suction component, the first suction component and the second suction component are arranged around the copper busbar so that the second suction component can approach the first suction component under the action of a magnetic field generated by a current flowing through the copper busbar, and the second suction component cooperates with a displacement detection component.

[0007] Furthermore, the second suction member moves unidirectionally in a direction approaching the first suction member through the ratchet assembly.

[0008] Furthermore, the ratchet assembly includes a rim, a claw and a rotating shaft, the rim is fixedly arranged relative to the copper bar, the inner ring surface of the rim is provided with internal teeth, the second suction member has a rotating end and a free end, the rotating end of the second suction member is fixedly connected to the rotating shaft, the claw is located at one end of the rotating shaft and meshes with the internal teeth, and the free end of the second suction member can be rotated to be close to the first suction member.

[0009] Furthermore, the first suction member and the second suction member are combined to form a channel structure for the copper busbar to pass through.

[0010] Furthermore, the ratchet assembly also includes a clamping piece and a clamping spring. The clamping piece is provided with a clamping end surface at one end facing the rim. Under the action of the clamping spring, the clamping end surface of the clamping piece is pressed against the outer annular surface of the rim.

[0011] Furthermore, the displacement detection component includes a sensor capable of monitoring the rotation of the second suction member.

[0012] Furthermore, the free end of the second suction member cooperates with the sensor.

[0013] Furthermore, the clamping member is slidably matched with the housing of the surge protector.

[0014] Furthermore, a sliding channel is provided on the shell of the surge protector, a snap-in groove is provided on the inner wall of the sliding channel, a snap-in portion is provided on the snap-in piece, the snap-in portion can be deformed to cooperate with the snap-in groove, and the snap-in portion can slide in the snap-in groove along the pressing direction of the snap-in piece and the rim.

[0015] The surge protector provided by the utility model comprises a lightning protection element, and the grounding copper bar of the surge current signal output device as described in any one of the above items is arranged in series with the lightning protection element on the grounding circuit.

[0016] Beneficial Effects

[0017] Compared with the existing temperature monitoring method, this solution can eliminate the interference of the temperature of other heat sources on the temperature sensor, and set the current threshold of signal triggering by the elastic force of the supporting spring. When the current flowing through the surge protector reaches or exceeds the signal triggering threshold, the magnetic field generated on the copper busbar can enable the second suction part to overcome the elastic force of the supporting spring to produce a displacement that can trigger the displacement monitoring component. Therefore, the current threshold of the displacement monitoring component to output the surge current signal can be set mechanically. 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 the surge current signal output device provided by the embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the cooperation between the ratchet assembly and the second suction part provided in the first embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the cooperation between the clamping member and the housing provided in the first embodiment of the utility model.

[0022] Figure numbers: 1-copper bar; 2-first suction member; 3-second suction member; 4-displacement detection assembly; 5-ratchet assembly; 6-clamping member; 7-tension spring; 8-wheel rim; 9-tooth claw; 10-free end; 11-clamping part; 12-housing; 13-sliding channel; 14-clamping groove; 15-hook body; 16-clamping end. 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] Example

[0025] like Figures 1 to 3 A surge current signal output device shown is used for a surge protector, comprising a first suction component 2, a second suction component 3 and a copper busbar 1 located on a grounding circuit, wherein the first suction component 2 is fixedly arranged relative to the copper busbar 1, a supporting spring is arranged between the first suction component 2 and the second suction component 3, the first suction component 2 and the second suction component 3 are arranged around the copper busbar 1 so that the second suction component 3 can approach the first suction component 2 under the action of a magnetic field generated by a current flowing through the copper busbar 1, and the second suction component 3 cooperates with a displacement detection component 4.

[0026] A temperature sensor is provided near the lightning protection element in the existing surge protector. When a surge current flows through the lightning protection element, the temperature of the lightning protection element rises. The temperature sensor monitors the temperature change of the lightning protection element, thereby realizing the monitoring of the surge current flowing through the copper bus 1. In order to avoid the disadvantage of large temperature monitoring error in the existing scheme, this scheme realizes the monitoring of the surge current signal by monitoring the magnetic field generated by the surge current. Specifically, the first attraction component 2 and the second attraction component 3 are located in the magnetic field area generated by the surge current in the copper bus 1. The magnetic field magnetizes the first attraction component 2 and the second attraction component 3, so that a mutual magnetic attraction force is generated between the two. This scheme monitors the displacement generated by the magnetic attraction force through a displacement monitoring component, thereby obtaining and outputting a signal of the surge current flowing through the surge protector.

[0027] The first suction member 2 and the second suction member 3 in this scheme are kept at a certain distance by the supporting spring. At this time, the position of the second suction member 3 is regarded as a state where no surge current flows through the surge protector, and the displacement monitoring component will not generate a signal of a surge current flowing through the surge protector; the first suction member 2 and the second suction member 3 are arranged around the copper bus 1, and the copper bus 1 is part of the grounding circuit. When the magnetic field generated by the surge current flowing through the copper bus 1 magnetizes the first suction member 2 and the second suction member 3, a magnetic attraction force is generated between the first suction member 2 and the second suction member 3. When the magnetic attraction force is greater than the elastic force of the supporting spring, the second suction member 3 approaches the first suction member 2 under the action of the magnetic attraction force. At this time, the position of the second suction member 3 is regarded as a state where a surge current flows through the surge protector, and the displacement monitoring component monitors the signal of the displacement of the second suction member 3 and outputs the signal.

[0028] Compared with the existing temperature monitoring method, this solution can eliminate the interference of the temperature of other heat sources on the temperature sensor, and set the current threshold of the signal trigger by the elastic force of the supporting spring. When the current flowing through the surge protector reaches or exceeds the signal trigger threshold, the magnetic field generated on the copper bus 1 can enable the second suction component 3 to overcome the elastic force of the supporting spring to produce a displacement that can trigger the displacement monitoring component. Therefore, the current threshold of the displacement monitoring component to output the surge current signal can be set mechanically.

[0029] In an optional embodiment, the second suction member 3 is unidirectionally moved in a direction approaching the first suction member 2 through the ratchet assembly 5 .

[0030] The surge current is a large instantaneous current. In order to make the second suction component 3 remain in the displacement state and trigger the displacement monitoring component after the surge current flows through the surge protector, the present scheme arranges a ratchet assembly 5 between the second suction component 3 and the shell 12, wherein the shell 12 is the shell 12 of the surge protector. The lightning protection element, copper bus 1 and the first suction component 2 in the present scheme are located in the shell 12, and are fixedly connected to the shell 12 by screws or snaps, etc., thereby forming a surge protector with a high degree of integration. The second suction component 3 is located in the shell 12 and is movably connected to the shell 12. The principle of unidirectional rotation of the ratchet assembly 5 is utilized so that the second suction component 3 can only move in the direction close to the first suction component 2 under the action of magnetic attraction. After the surge current flows through the surge protector, the ratchet assembly 5 limits the second suction component 3 from resetting under the elastic force of the supporting spring, so that the second suction component 3 remains in the displacement state and triggers the displacement monitoring component.

[0031] In an optional embodiment, the ratchet assembly 5 includes a rim 8, a claw 9 and a rotating shaft. The rim 8 is fixedly arranged relative to the copper bar 1. The inner ring surface of the rim 8 is provided with internal teeth. The second suction member 3 has a rotating end and a free end 10. The rotating end of the second suction member 3 is fixedly connected to the rotating shaft. The claw 9 is located at one end of the rotating shaft and meshes with the internal teeth. The free end 10 of the second suction member 3 can be rotated to be close to the first suction member 2.

[0032] The rim 8 of the ratchet assembly 5 remains relatively fixed. Specifically, the rim 8 is fixedly connected to the shell 12 by means of screws or snaps, and the rotating shaft is connected to the rotating end of the second suction member 3. Under the action of the magnetic attraction force, the second suction member 3 rotates around the rotating shaft to the free end 10 close to the first suction member 2. A toothed claw 9 is provided at one end of the rotating shaft close to the rim 8, and the other end is rotatably connected to the shell 12. The rotating shaft and the toothed claw 9 rotate with the second suction member 3, and the inner teeth on the inner ring surface of the rim 8 are unidirectionally clamped to the toothed claw 9. After the surge current flows through the surge protector, the elastic force of the supporting spring generates a driving force for the second suction member 3 to rotate in the opposite direction, and the inner teeth of the rim 8 are locked with the toothed claw 9 in the rotation direction, so that the second suction member 3 still maintains a displacement state.

[0033] In an optional embodiment, the first suction member 2 and the second suction member 3 are enclosed to form a channel structure for the copper bus 1 to pass through.

[0034] The first suction member 2 and the second suction member 3 are both C-shaped structures, and are arranged relative to each other to form a channel structure with a gap at the joint. The gap is larger when the second suction member 3 is in a state where no surge current flows through the surge protector, and is smaller when the second suction member 3 is in a state where a surge current flows through the surge protector.

[0035] The copper bar 1 passes through the channel structure so that the first suction member 2 and the second suction member 3 surround the copper bar 1, and the two end portions of the first suction member 2 facing the second suction member 3 are magnetized to form magnetic poles with opposite magnetism under the action of the magnetic field of the copper bar 1, and the two end portions of the second suction member 3 facing the first suction member 2 are magnetized to form magnetic poles with opposite magnetism under the action of the magnetic field of the copper bar 1, wherein the magnetism of the ends of the first suction member 2 and the second suction member 3 located on one side of the copper bar 1 is opposite, and the magnetism of the ends of the first suction member 2 and the second suction member 3 located on the other side of the copper bar 1 is also opposite, so that the two end portions of the first suction member 2 and the two end portions of the second suction member 3 both generate magnetic attraction, so that the second suction member 3 is close to the first suction member 2 under the action of the magnetic attraction.

[0036] Preferably, the second suction member 3 is rotatably matched via a rotating shaft, and the channel structure formed by the first suction member 2 and the second suction member 3 forms channel openings at the rotating end close to the second suction member 3 and at the free end 10, respectively.

[0037] In an optional embodiment, the ratchet assembly 5 also includes a clamping member 6 and a clamping spring 7. The clamping member 6 has a clamping end 16 at one end facing the rim 8. Under the action of the clamping spring 7, the clamping end 16 of the clamping member 6 is pressed against the outer ring surface of the rim 8.

[0038] The wheel rim 8 is relatively fixed to the housing 12 by the friction force of the clamping member 6. When the clamping member 6 does not abut against the outer ring surface of the wheel rim 8, the wheel rim 8 can rotate under the push of the claw 9 as the second suction member 3 rotates in the opposite direction. The clamping member 6 abuts against the outer ring surface of the wheel rim 8 under the elastic force of the clamping spring 7, so that the wheel rim 8 remains fixed under the action of the friction force. When the second suction member 3 needs to be reset, the clamping member 6 is manually disengaged from the wheel rim 8. At this time, the claw 9 pushes the wheel rim 8 to rotate under the elastic force of the supporting spring until the second suction member 3 is reset.

[0039] Alternatively, the outer surface of the rim 8 is provided with a tooth structure, and the corresponding position of the clamping member 6 is also provided with a matching tooth structure, and the two are engaged with the tooth structure to achieve relative fixation of the rim 8. When the second suction member 3 needs to be reset, the tooth structure between the clamping member 6 and the rim 8 is manually disengaged.

[0040] In an optional implementation, the displacement detection component 4 includes a sensor capable of monitoring the rotation of the second suction member 3 .

[0041] Specifically, the sensor is a displacement sensor or a pressure sensor.

[0042] In an optional embodiment, the free end 10 of the second suction member 3 cooperates with the sensor.

[0043] The free end 10 of the second suction member 3 cooperates with the displacement sensor. When the second suction member 3 rotates, the displacement at the free end 10 is the largest, so it is convenient to monitor it through the displacement sensor.

[0044] In an optional embodiment, the clamping member 6 is slidably matched with the housing 12 of the surge protector.

[0045] The clip 6 has a clipping end 16 and a mating end. The portion of the clip 6 close to the mating end slides with the shell 12 along the pressing direction with the rim 8. The clip 6 can slide close to or away from the rim 8. The pressing spring 7 is fixed on the clip 6 by snapping. One end of the pressing spring 7 abuts against the clip 6, and the other end abuts against the shell 12. The portion of the clip 6 close to the clipping end 16 forms an abutting surface. Preferably, the abutting surface is an arc surface, and the arc is consistent with the arc of the outer ring surface of the rim 8, so that the clip 6 can press against the rim 8 to limit the rotation of the rim 8.

[0046] Alternatively, the clamping member 6 is rotatably matched with the housing 12, and the portion of the clamping member 6 close to the matching end is rotatably matched with the housing 12 of the surge protector, and the clamping member 6 can be rotated until the portion close to the clamping end 16 is close to or away from the rim 8. The clamping member 6 is fixed with a clamping spring 7, one end of the clamping spring 7 is against the portion between the matching end of the clamping member 6 and the clamping end 16, and the other end is against the housing 12.

[0047] In an optional embodiment, a sliding channel 13 is provided on the shell 12 of the surge protector, a snap-in groove 14 is provided on the inner wall of the sliding channel 13, a snap-in portion 11 is provided on the snap-in component 6, the snap-in portion 11 can be deformed to cooperate with the snap-in groove 14, and the snap-in portion 11 can slide in the snap-in groove 14 along the pressing direction of the snap-in component 6 and the rim 8.

[0048] A sliding channel 13 with an opening at one end is provided at the corresponding position of the shell 12. The part of the clip 6 close to the matching end and the clamping spring 7 are inserted into the sliding channel 13 through the opening and slidably cooperate with the shell 12. A clamping groove 14 is provided on the inner wall of the sliding channel 13. A clamping portion 11 is provided at the part of the clip 6 close to the clamping end 16. The clamping portion 11 is a rod-shaped structure. One end of the clamping portion 11 is fixed to the part of the clip 6 close to the clamping end 16, and the other end extends from the clamping end 16 to the matching end, and a hook body 15 is formed at the end. The clamping portion 11 can be deformed until the hook body 15 enters the sliding channel 13 with the clip 6 through the opening, and inserts the hook body 15 into the clamping groove 14 when sliding to the clamping groove 14. At this time, the clamping spring 7 also abuts against the end surface of the sliding channel 13. Under the action of the clamping spring 7, the hook body 15 of the clip 6 cooperates with the groove wall surface of the clamping groove 14, so that the clip 6 cannot be reversed from the clamping groove 14. There is a certain space in the snap groove 14 along the sliding direction of the snap connector 6, so that the hook body 15 can move in the snap groove 14 along the sliding direction of the snap connector 6. Therefore, the snap connector 6 can continue to compress the spring 7 and slide a certain distance in the sliding channel 13 when subjected to external thrust. This design allows the snap connector 6 to provide a matching redundancy by continuing to compress the spring 7 when it is matched with the wheel rim 8, thereby avoiding the size error or assembly error of the snap connector 6 or the wheel rim 8 causing the two to fail to match, or the friction force generated by sufficient pressure cannot keep the wheel rim 8 relatively fixed. When the wheel rim 8 needs to be rotated, the force provided by the operator externally slides the snap connector 6 along the direction of insertion until it is disengaged from the wheel rim 8 or the friction between the snap connector 6 and the wheel rim 8 is less than the elastic force of the supporting spring, so that the wheel rim 8 can rotate with the second suction member 3.

[0049] The surge protector provided by the utility model comprises a lightning protection element. A grounding copper bar 1 of a surge current signal output device and the lightning protection element are arranged in series on a grounding circuit.

[0050] The surge protector includes a lightning protection module and a backup protection module. The lightning protection module and the backup protection module are fixedly matched with the chassis respectively. One backup protection module and one lightning protection module constitute one-way surge protector. One chassis component cooperates with multiple surge protectors to form a multi-way surge protector product. The copper bus 1 aggregates the grounding circuits of each surge protector and cooperates with the displacement detection component 4 through the first suction component 2 and the second suction component 3.

[0051] 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.

[0052] 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 surge current signal output device for a surge protector, characterized in that: The invention comprises a first attracting member (2), a second attracting member (3) and a copper bar (1) located on a grounding circuit, wherein the first attracting member (2) is fixedly arranged relative to the copper bar (1), a supporting spring is arranged between the first attracting member (2) and the second attracting member (3), the first attracting member (2) and the second attracting member (3) are arranged around the copper bar (1), so that the second attracting member (3) can approach the first attracting member (2) under the action of a magnetic field generated by a current flowing through the copper bar (1), and the second attracting member (3) cooperates with a displacement detection component (4).

2. The surge current signal output device according to claim 1, characterized in that: The second suction member (3) is unidirectionally movable in a direction approaching the first suction member (2) via a ratchet assembly (5).

3. The surge current signal output device according to claim 2, characterized in that: The ratchet assembly (5) comprises a wheel rim (8), a toothed claw (9) and a rotating shaft. The wheel rim (8) is fixedly arranged relative to the copper bar (1). The inner annular surface of the wheel rim (8) is provided with internal teeth. The second suction member (3) has a rotating end and a free end (10). The rotating end of the second suction member (3) is fixedly connected to the rotating shaft. The toothed claw (9) is located at one end of the rotating shaft and meshes with the internal teeth. The free end (10) of the second suction member (3) can be rotated to be close to the first suction member (2).

4. The surge current signal output device according to claim 1, characterized in that: The first suction member (2) and the second suction member (3) are enclosed to form a channel structure for the copper busbar (1) to pass through.

5. The surge current signal output device according to claim 3, characterized in that: The ratchet assembly (5) further comprises a clamping member (6) and a clamping spring (7); one end of the clamping member (6) facing the wheel rim (8) is provided with a clamping end (16) surface; under the action of the clamping spring (7), the clamping end (16) surface of the clamping member (6) is abutted against the outer annular surface of the wheel rim (8).

6. The surge current signal output device according to claim 3, characterized in that: The displacement detection component (4) comprises a sensor capable of monitoring the rotation of the second suction member (3).

7. The surge current signal output device according to claim 6, characterized in that: The free end (10) of the second suction member (3) cooperates with the sensor.

8. The surge current signal output device according to claim 5, characterized in that: The clamping member (6) is slidably matched with the housing (12) of the surge protector.

9. The surge current signal output device according to claim 8, characterized in that: The housing (12) of the surge protector is provided with a sliding channel (13), the inner wall of the sliding channel (13) is provided with a snap-fitting groove (14), the snap-fitting piece (6) is provided with a snap-fitting portion (11), the snap-fitting portion (11) can be deformed to cooperate with the snap-fitting groove (14), and the snap-fitting portion (11) can slide in the snap-fitting groove (14) along the abutting direction of the snap-fitting piece (6) and the wheel rim (8).

10. A surge protector, comprising a lightning protection element, characterized in that: The grounding copper busbar (1) of the surge current signal output device according to any one of claims 1 to 9 is arranged in series with the lightning protection element on the grounding circuit.

Images