Surge current signal optical fiber output device and surge protector

Abstract

The utility model relates to the field of surge protector equipment, in particular to a surge current signal optical fiber output device and a surge protector. The surge current signal optical fiber 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 grounding circuit piece, the first pull-in piece is fixedly arranged relative to the grounding circuit piece, 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 arranged on the grounding circuit piece. The first attraction piece and the second attraction piece are arranged around the grounding circuit piece, 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 grounding circuit piece, and the second attraction piece can abut against an optical fiber till the optical fiber is bent. The end of the optical fiber is coupled with an optical time domain reflectometer.

Description

Technical Field

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

[0002] The function of a surge protector is to protect the lines it is connected to. The surge protector is applied to a power supply circuit or a communication line. Its principle is to achieve the conduction and shunting of impact current through internal lightning protection components, thereby avoiding damage to the devices on the power supply circuit or communication line caused by the impact current. 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 component in the existing surge protector. When the surge current flows through the lightning protection component, the temperature of the lightning protection component rises. The temperature sensor monitors the temperature change of the lightning protection component and converts the analog signal of the temperature sensor into a digital electrical signal through a circuit for output, so as to achieve the monitoring of the surge current flowing through the copper bar.

[0003] The disadvantage of the existing temperature monitoring is that the temperature sensor needs to cooperate with electrical components such as circuits. Therefore, the operation of the surge protector either requires power supply through a cable, so the deployment of the surge protector is restricted; or it needs to be equipped with a built-in power storage module, which also requires daily maintenance to maintain the normal operation of the power storage module. Content of the Utility Model

[0004] On the one hand, the utility model provides a surge current signal optical fiber output device, which can monitor the surge current and transmit signals without electrical components.

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

[0006] The surge current signal optical fiber output device provided by the utility model is used for a surge protector, and includes a first attracting member, a second attracting member and a grounding circuit member. The first attracting member is fixedly arranged relative to the grounding circuit member. A support spring is arranged between the first attracting member and the second attracting member. The first attracting member and the second attracting member are arranged around the grounding circuit member, so that the second attracting member can approach the first attracting member under the action of the magnetic field generated by the current flowing through the grounding circuit member. The second attracting member can abut against the optical fiber until the optical fiber is bent. The end of the optical fiber is coupled to an optical time domain reflectometer.

[0007] Further, the optical fiber is arranged at the free end corresponding to the second attracting member through a tensioning component.

[0008] Further, the tensioning assembly includes support members. Along the extending direction of the optical fiber, the two support members are spaced apart. A fitting groove for cooperating with the second attracting member is formed between the two support members. Along the direction perpendicular to the extending direction of the optical fiber, two clamping members are spaced apart on each support member. A second clamping groove is formed between the two clamping members, and the optical fiber sequentially passes through the two second clamping grooves.

[0009] Further, the surge current signal optical fiber output device further includes a rim, a pawl, and a rotating shaft. The rim is fixedly arranged relative to the grounding circuit component. Internal teeth are provided on the inner ring surface of the rim. The second attracting member has a rotating end and a free end. The rotating end of the second attracting member is fixedly connected to the rotating shaft. The pawl is located at one end of the rotating shaft and meshes with the internal teeth. The free end of the second attracting member can rotate to be close to the first attracting member.

[0010] Further, a channel structure for the grounding circuit component to pass through is formed by enclosing the first attracting member and the second attracting member.

[0011] Further, the surge current signal optical fiber output device further includes a first clamping member and a pressing spring. A clamping end face is provided at one end of the first clamping member facing the rim. Under the action of the pressing spring, the clamping end face of the first clamping member abuts against the outer ring surface of the rim.

[0012] Further, a first clamping groove with one end open is provided at the free end of the second attracting member, and the optical fiber can be cut into the first clamping groove through the opening.

[0013] Further, the grounding circuit component includes a copper bar, and the first attracting member is fixedly arranged relative to the copper bar.

[0014] Further, the surge current signal optical fiber output device further includes a housing, and the first attracting member and the copper bar are respectively fixedly connected to the housing.

[0015] The surge protector provided by the present utility model includes a lightning protection element, and the grounding circuit component of the surge current signal optical fiber output device as described in any one of the above is connected in series with the lightning protection element. Beneficial effects

[0016] In the present solution, the first attracting member and the second attracting member are magnetized by the magnetic field generated by the surge current flowing through the grounding circuit component, so that a magnetic suction force is generated between the first attracting member and the second attracting member. The second attracting member moves close to the first attracting member under the action of the magnetic suction force and pushes the optical fiber to bend. The information of the optical path attenuation caused by the bending of the optical fiber at this position can be detected by an optical time domain reflectometer, and thus the information of the surge current flowing through the surge protector corresponding to the bending point of the optical fiber at this place can be obtained.

[0017] Compared with the existing temperature monitoring methods, this solution can exclude the interference of the temperature of other heat sources on the temperature sensor, and the method of sending the action signal of the second attracting member to the external host computer does not require power supply to the surge protector itself. There is no power-consuming unit in the device for monitoring surge current of the surge protector. Only the optical time domain reflectometer located at the far end needs to be powered. At the same time, the surge protector does not have a built-in power supply, and there is no maintenance matter for its own power supply. Therefore, the surge protector in this solution can be deployed and operated in areas without power supply conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is an overall schematic diagram of the surge current signal optical fiber output device provided by the embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the cooperation between the first attracting member and the second attracting member provided by the embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the cooperation between the first clamping member and the wheel rim provided by the embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the cooperation between the surge current signal optical fiber output device provided by the embodiment of the present invention and the optical fiber.

[0023] Reference numerals in the drawings: 1 - grounding circuit component; 2 - second attracting member; 3 - first attracting member; 4 - optical fiber; 5 - channel structure; 6 - wheel rim; 7 - tooth claw; 8 - first clamping member; 9 - abutting spring; 10 - first clamping groove; 11 - support member; 12 - clamping member; 13 - mating groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will detail the specific embodiments of the present invention with reference to the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Embodiment

[0025] A surge current signal fiber optic output device for a surge protector, comprising a first attracting member 3, a second attracting member 2 and a grounding circuit member 1. The first attracting member 3 is fixedly arranged relative to the grounding circuit member 1. A support spring is provided between the first attracting member 3 and the second attracting member 2. The first attracting member 3 and the second attracting member 2 are arranged around the grounding circuit member 1 so that the second attracting member 2 can approach the first attracting member 3 under the action of the magnetic field generated by the current flowing through the grounding circuit member 1. The second attracting member 2 can abut against the optical fiber 4 to bend the optical fiber 4. The end of the optical fiber 4 is coupled to an optical time domain reflectometer.

[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 grounding circuit member 1. To avoid the disadvantages of large temperature monitoring error and the need for power supply in the existing solution, this solution realizes the monitoring of the surge current signal by monitoring the magnetic field generated by the surge current. Specifically, the first attracting member 3 and the second attracting member 2 are located in the magnetic field region generated by the surge current in the grounding circuit member 1. The magnetic field magnetizes the first attracting member 3 and the second attracting member 2, causing a mutual magnetic attraction force between them. The optical fiber 4 is located at the corresponding position of the second attracting member 2. The movement of the second attracting member 2 causes it to abut against the optical fiber 4 and push the optical fiber 4 to bend. The bending of the optical fiber 4 at this position can be monitored by the optical time domain reflectometer coupled to its end. The optical time domain reflectometer can obtain the attenuation information based on the backward scattered light generated when light propagates in the optical fiber 4. Using this characteristic, the bending of the optical fiber 4 at the second attracting member 2 can be obtained. The optical time domain reflectometer thereby obtains the information about the surge current flowing through the surge protector corresponding to the bending point of the optical fiber 4 at this place.

[0027] In this solution, the first attracting member 3 and the second attracting member 2 maintain a certain distance through the support spring. At this time, the position of the second attracting member 2 is regarded as the state where no surge current flows through the surge protector, and the displacement monitoring component will not generate a signal indicating that a surge current flows through the surge protector. The first attracting member 3 and the second attracting member 2 are arranged around the grounding circuit member 1. The grounding circuit member 1 is a part of the grounding circuit. When the magnetic field generated by the surge current flowing through the grounding circuit member 1 magnetizes the first attracting member 3 and the second attracting member 2, a magnetic attraction force is generated between the first attracting member 3 and the second attracting member 2. When this magnetic attraction force is greater than the elastic force of the support spring, the second attracting member 2 approaches the first attracting member 3 under the action of the magnetic attraction force. At this time, the position of the second attracting member 2 is regarded as the state where a surge current flows through the surge protector. The optical fiber 4 cooperates with the optical time domain reflectometer to monitor the signal of the displacement of the second attracting member 2 and output the signal.

[0028] Compared with the existing temperature monitoring methods, this solution can eliminate the interference of the temperatures of other heat sources on the temperature sensor, and the method of sending the action signal of the second engaging member 2 to the external host computer does not require power supply to the surge protector itself. The device for monitoring surge current in the surge protector does not have an electricity-consuming unit, and only needs to supply power to the optical time domain reflectometer located at the remote end. At the same time, the surge protector does not have a built-in power supply, and there are no maintenance matters for its own power supply. Therefore, the surge protector in this solution can be deployed and operated in areas without power supply conditions.

[0029] In an optional implementation manner, the optical fiber 4 is arranged at the free end corresponding to the second engaging member 2 through a tensioning assembly.

[0030] The tensioning assembly fixes and supports the optical fiber 4, so that the optical fiber 4 remains relatively fixed in the surge protector, and the optical fiber 4 remains in a tensioned state within the action area of the tensioning assembly. Thus, when the optical fiber 4 in this area can be pushed by the free end of the second engaging member 2, it is bent, and thus is monitored by the optical time domain reflectometer.

[0031] In an optional implementation manner, the tensioning assembly includes support members 11. Along the extending direction of the optical fiber 4, two support members 11 are arranged at intervals, and a fitting groove 13 for cooperating with the second engaging member 2 is formed between the two support members 11. On each support member 11, two clamping members 12 are arranged at intervals in the direction perpendicular to the extending direction of the optical fiber 4, and a second clamping groove is formed between the two clamping members 12. The optical fiber 4 passes through the two second clamping grooves in sequence.

[0032] The optical fiber 4 can be bent by the pushing of the second engaging member 2 between the two support members 11. A tensioning member is arranged on the chassis member. The optical fiber 4 is wound around the tensioning member in the chassis member to be coiled in the chassis member, passes through the support members 11, and remains in a tensioned state. The distance between the optical fiber 4 at the tensioning member and the chassis member is smaller than the distance between the abutting end face of the support member 11 and the chassis member. Therefore, the optical fiber 4 is in contact with the abutting end face of the support member 11 when passing through the support member 11, and is lifted to a position farther from the chassis member through the abutting end face, facilitating the optical fiber 4 to generate a deformation that can be measured by the monitoring host when being pushed by the second engaging member 2.

[0033] The two clamping members 12 are arranged at intervals on the abutting end face of the support member 11 to form a clamping groove. The optical fiber 4 passes through the two clamping grooves in sequence. The two clamping members 12 restrain the optical fiber 4. A fitting groove 13 is formed between the two support members 11. When the second engaging member 2 moves between the two support members 11, it pushes the optical fiber 4 therein. When the optical fiber 4 is restrained by the clamping members 12, it cannot move. Therefore, when the optical fiber 4 located in the fitting groove 13 is pushed by the second engaging member 2, its two ends do not displace, and only displace at the pushing position of the second engaging member 2, thereby generating a bending deformation.

[0034] In an alternative embodiment, the surge current signal optical fiber output device further includes a rim 6, a pawl 7, and a rotating shaft. The rim 6 is fixedly arranged relative to the grounding circuit component 1. An internal tooth is provided on the inner ring surface of the rim 6. The second attracting member 2 has a rotating end and a free end. The rotating end of the second attracting member 2 is fixedly connected to the rotating shaft. The pawl 7 is located at one end of the rotating shaft and meshes with the internal tooth. The free end of the second attracting member 2 can rotate to be close to the first attracting member 3.

[0035] The surge current is an instantaneous large current. To enable the second attracting member 2 to still maintain a displaced state after the surge protector passes through the surge current, causing the optical fiber 4 to bend, in this solution, a rim 6 and a pawl 7 are provided between the second attracting member 2 and the housing. Here, the housing is the housing of the surge protector. In this solution, lightning protection components, the grounding circuit component 1, the first attracting member 3, etc. are located inside the housing and are fixedly connected to the housing by screws or snaps, etc., thus forming a surge protector with a relatively high integration degree. The second attracting member 2 is located inside the housing and is connected to the housing through a rotating shaft. Using the principle of the one-way rotation of the ratchet wheel formed by the cooperation of the rim 6 and the pawl 7, the second attracting member 2 can only rotate in the direction close to the first attracting member 3 under the action of magnetic attraction. After the surge protector passes through the surge current, the ratchet wheel restricts the second attracting member 2 from resetting under the elastic force of the support spring.

[0036] Specifically, the rim 6 is fixedly connected to the housing by screws or snaps, etc. The rotating shaft is connected to the rotating end of the second attracting member 2. The second attracting member 2 rotates around the rotating shaft under the action of magnetic attraction until the free end is close to the first attracting member 3. A pawl 7 is provided at one end of the rotating shaft close to the rim 6, and the other end is rotatably connected to the housing. The rotating shaft and the pawl 7 rotate with the second attracting member 2. The internal tooth on the inner ring surface of the rim 6 performs one-way clamping on the pawl 7. After the surge protector passes through the surge current, the elastic force of the support spring generates a driving force for the second attracting member 2 to rotate in the reverse direction. The internal tooth of the rim 6 is locked with the pawl 7 in this rotation direction, so that the second attracting member 2 still maintains a displaced state.

[0037] In an alternative embodiment, the first attracting member 3 and the second attracting member 2 enclose a channel structure 5 for the grounding circuit component 1 to pass through.

[0038] Both the first attracting member 3 and the second attracting member 2 are C-shaped structures. They are arranged opposite to each other to form a channel structure 5 with a gap at the joint. This gap is larger when the second attracting member 2 is in the state position where no surge current flows through the surge protector, and smaller when the second attracting member 2 is in the state position after the surge current flows through the surge protector.

[0039] The grounding circuit component 1 passes through the channel structure 5, such that the first attracting component 3 and the second attracting component 2 surround the grounding circuit component 1. The two end portions of the first attracting component 3 facing the second attracting component 2 are magnetized under the action of the magnetic field of the grounding circuit component 1 to form magnetic poles with opposite polarities. The two end portions of the second attracting component 2 facing the first attracting component 3 are magnetized under the action of the magnetic field of the grounding circuit component 1 to form magnetic poles with opposite polarities. Among them, the end portions of the first attracting component 3 and the second attracting component 2 on one side of the grounding circuit component 1 have opposite magnetic polarities, and the end portions of the first attracting component 3 and the second attracting component 2 on the other side of the grounding circuit component 1 also have opposite magnetic polarities. Therefore, magnetic suction forces are generated at both end portions of the first attracting component 3 and both end portions of the second attracting component 2, such that the second attracting component 2 approaches the first attracting component 3 under the action of the magnetic suction force.

[0040] Preferably, the second attracting component 2 is rotationally fitted through a rotating shaft. The channel structure 5 formed by the first attracting component 3 and the second attracting component 2 forms channel openings respectively at a position close to the rotating end of the second attracting component 2 and at the free end.

[0041] In an alternative embodiment, the surge current signal optical fiber output device further includes a first clamping component 8 and a pressing spring 9. One end of the first clamping component 8 facing the rim 6 is provided with a clamping end face. The first clamping component 8 makes the clamping end face abut against the outer ring surface of the rim 6 under the action of the pressing spring 9.

[0042] The rim 6 is kept relatively fixed with respect to the housing by the frictional force of the first clamping component 8. When the first clamping component 8 does not abut against the outer ring surface of the rim 6, the rim 6 can rotate under the push of the tooth claw 7 as the second attracting component 2 rotates in the reverse direction. The first clamping component 8 abuts against the outer ring surface of the rim 6 under the elastic force of the pressing spring 9, so that the rim 6 is kept fixed under the action of the frictional force. When a reset operation needs to be performed on the second attracting component 2, the first clamping component 8 is manually disengaged from the rim 6. At this time, the tooth claw 7 pushes the rim 6 to rotate to reset the second attracting component 2 under the elastic force of the supporting spring.

[0043] In an alternative embodiment, a first clamping groove 10 with one end open is provided at the free end of the second attracting component 2. The optical fiber 4 can be cut into the first clamping groove 10 through the opening.

[0044] Two first clamping grooves 10 are respectively opened at both end portions of the second attracting component 2 facing the first attracting component 3. The opening of the first clamping groove 10 faces the optical fiber 4. When the second attracting component 2 rotates to make the free end close to the optical fiber 4, the optical fiber 4 is cut into the first clamping groove 10 through the opening. The first clamping groove 10 forms a constraint on the optical fiber 4, such that this section of the optical fiber 4 can move with the second attracting component 2, while the support member 11 for supporting the optical fiber 4 forms a constraint on the optical fiber 4 along the moving direction of the free end of the second attracting component 2, thereby forming a bend between the two support members 11.

[0045] In an optional implementation, the grounding circuit component 1 includes a copper busbar, and the first attraction component 3 is fixedly disposed relative to the copper busbar.

[0046] The copper busbar is located on the grounding circuit of the surge protector and is used to form a part of the grounding circuit component 1. The copper busbar in this solution is located inside the shell and is fixedly connected to the shell by screws or snaps. There is a distance between the copper busbar and the first suction component 3 and the second suction component 2.

[0047] The surge protector provided by the utility model comprises a lightning protection element, such as a grounding circuit element 1 of any of the surge current signal optical fiber output devices described above and a lightning protection element arranged in series.

[0048] The surge protector provided by the present invention comprises a lightning protection module and a backup protection module, wherein the lightning protection module and the backup protection module are respectively fixedly matched with the chassis. An optical fiber 4 is mounted in the chassis through a support member 11 .

[0049] The lightning protection module includes a lightning protection element and a thermal release assembly. A backup protection module and a lightning protection module constitute a surge protector. A chassis component cooperates with the multi-channel surge protectors to form a multi-channel surge protector product. The copper busbar aggregates the grounding circuits of each surge protector and cooperates with an optical fiber 4 in the chassis component through the first suction component 3 and the second suction component 2. The optical fiber 4 extends out of the chassis component and is coupled with an optical time domain reflectometer. An optical time domain reflectometer connects multiple multi-channel surge protector products in series through the optical fiber 4.

[0050] 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.

[0051] 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 optical fiber output device for a surge protector, characterized in that: The invention comprises a first attracting member (3), a second attracting member (2) and a grounding circuit member (1), wherein the first attracting member (3) is fixedly arranged relative to the grounding circuit member (1), a supporting spring is arranged between the first attracting member (3) and the second attracting member (2), and the first attracting member (3) and the second attracting member (2) are arranged around the grounding circuit member (1) so that the second attracting member (2) can approach the first attracting member (3) under the action of the magnetic field generated by the current flowing through the grounding circuit member (1), and the second attracting member (2) can abut against the optical fiber (4) until the optical fiber (4) is bent, and the end of the optical fiber (4) is in contact with the optical fiber (4). The optical fiber (4) is arranged at the free end corresponding to the second suction member (2) through a tensioning assembly; the tensioning assembly comprises a support member (11), two support members (11) are arranged at intervals along the extension direction of the optical fiber (4), a matching groove (13) for matching with the second suction member (2) is formed between the two support members (11), two clamping members (12) are arranged at intervals on each support member (11) in a direction perpendicular to the extension direction of the optical fiber (4), a second clamping groove is formed between the two clamping members (12), and the optical fiber (4) passes through the two second clamping grooves in sequence.

2. The surge current signal optical fiber output device according to claim 1, characterized in that: The surge current signal optical fiber output device further comprises a rim (6), a tooth claw (7) and a rotating shaft. The rim (6) is fixedly arranged relative to the grounding circuit component (1). The inner annular surface of the rim (6) is provided with internal teeth. The second suction member (2) has a rotating end and a free end. The rotating end of the second suction member (2) is fixedly connected to the rotating shaft. The tooth claw (7) is located at one end of the rotating shaft and meshes with the internal teeth. The free end of the second suction member (2) can be rotated to be close to the first suction member (3).

3. The surge current signal optical fiber output device according to claim 1, characterized in that: The first attraction component (3) and the second attraction component (2) are enclosed to form a channel structure (5) for the grounding circuit component (1) to pass through.

4. The surge current signal optical fiber output device according to claim 2, characterized in that: The surge current signal optical fiber output device further comprises a first clamping member (8) and a clamping spring (9); the first clamping member (8) is provided with a clamping end face at one end facing the wheel rim (6); and the first clamping member (8) is caused to abut against the outer annular surface of the wheel rim (6) under the action of the clamping spring (9).

5. The surge current signal optical fiber output device according to claim 1, characterized in that: A first clamping groove (10) with one end open is provided at the free end of the second suction member (2), and the optical fiber (4) can be cut into the first clamping groove (10) through the opening.

6. The surge current signal optical fiber output device according to claim 1, characterized in that: The grounding circuit component (1) comprises a copper bar, and the first attraction component (3) is fixedly arranged relative to the copper bar.

7. The surge current signal optical fiber output device according to claim 6, characterized in that: The surge current signal optical fiber output device also includes a housing, and the first attraction component (3) and the copper busbar are respectively fixedly connected to the housing.

8. A surge protector, comprising a lightning protection element, characterized in that: The grounding circuit component (1) of the surge current signal optical fiber output device according to any one of claims 1 to 7 is arranged in series with the lightning protection element.

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