Optical fiber alarm device and electric power equipment

Abstract

The present invention discloses an optical fiber alarm device and an electric power equipment. The optical fiber alarm device specifically comprises a base, and the base comprises a containing box body with a cavity therein; an optical fiber unit is arranged on the containing box body, and one end of the optical fiber unit extends into the cavity; an optical fiber trigger assembly is rotatably connected in the cavity, and a reset unit is also connected to the optical fiber trigger assembly; a blocking portion is arranged outside the containing box body; a limiting assembly is arranged between the blocking portion and the containing box body; one end of the limiting assembly extends into the cavity and is connected to the optical fiber trigger assembly; the other end of the limiting assembly passes through the blocking portion and is fixedly connected to an external connection unit; an alarm trigger unit is also arranged on the side of the blocking portion away from the containing box body; the alarm trigger unit is detachably connected to the external connection unit; in the above-mentioned situation of intrusion, the optical fiber trigger assembly can knock the optical fiber unit twice at a fixed interval, that is, generate two vibration signals with extremely high recognition, which has the advantages of low cost and high alarm efficiency.

Description

Technical Field

[0001] The present invention relates to the field of anti-theft technology, and in particular to an optical fiber alarm device and electric power equipment. Background Art

[0002] For civil equipment such as substations and communication base stations, cable trenches are essential infrastructure. The cables in the cable trenches are not only used for power transmission, but also for relay protection, automatic control, communication, measurement and metering. They are the nerve center of various equipment. Therefore, once an illegal intrusion into the cable trench occurs, the cables therein will fail. This failure is not only difficult to troubleshoot and time-consuming, but may also cause the relay protection or control circuit to fail, causing the accident to expand or even damage the main equipment, and production cannot be resumed for a long time. The current troubleshooting method relies on the traditional manual inspection method, which is difficult to effectively prevent cable failures and serious personal injury accidents caused by external factors such as disorderly and barbaric construction. Therefore, a real-time distributed intelligent cable safety monitoring and early warning technology is needed to eliminate blind spots in time and space.

[0003] At present, many cities try to use infrared beaming, electronic manhole covers and other methods to achieve anti-theft of cables and cable trenches. However, whether it is infrared beaming or electronic manhole covers, they can only be installed in the wells at the power supply end, and cannot monitor the entire underground trench. In addition, for the infrared beaming solution, there are problems such as poor environmental reliability, especially in the south, where the rainy season is long and the environment is humid, and the life of the infrared system is far lower than the design value. For the electronic manhole cover solution (i.e., adding mobile phone communication chips and accelerometers in the manhole cover to monitor the movement of the manhole cover), it can only monitor the status of the manhole cover, and it is difficult to take into account the abnormal conditions of the cable trench itself. For the manhole covers that easily cost millions in cities, this type of electronic and chip combination technology is too expensive and has poor environmental adaptability. Especially in humid areas, there are problems such as easy corrosion and difficulty in power supply. In addition, it needs to be replaced frequently, the system life is short, and the subsequent maintenance cost is high.

[0004] In order to overcome the high cost disadvantages of infrared ray beaming and electronic manhole covers, a theft alarm method using optical fiber has been proposed in the prior art. The core of the method is to bury armored optical fiber along the cable trench. When the intruder opens the manhole cover and generates vibration, the optical fiber uses the vibration signal to judge the intrusion. However, this method is easily affected by the internal air of the cable trench and the protective cover of the optical fiber, and is also easily affected by the vibration signal of the fall in the cable trench, which leads to the inability to accurately issue an intrusion alarm. The alarm is often issued only when the intruder is very close to the protective object or has touched the optical fiber, and the alarm efficiency is low.

[0005] Therefore, it is necessary to develop a new alarm device to overcome the problem that the alarm device in the prior art cannot be compatible with both low cost and high alarm efficiency. Summary of the invention

[0006] The object of the present invention is to provide an optical fiber alarm device and an electric power device to solve the problem that the alarm devices in the prior art cannot be compatible with both low cost and high alarm efficiency.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] An optical fiber alarm device comprises a base, wherein the base comprises a housing body with a cavity therein; an optical fiber unit is arranged on one side wall of the housing body, and one end of the optical fiber unit extends into the cavity;

[0009] An optical fiber trigger component is rotatably connected in the cavity and is used to knock the optical fiber unit to alarm; a reset unit is also connected to the optical fiber trigger component;

[0010] A blocking portion is disposed outside the housing box; a limiting assembly is disposed between the blocking portion and the housing box; one end of the limiting assembly extends into the cavity and is connected to the optical fiber trigger assembly, so as to drive the optical fiber trigger assembly to rotate; the other end of the limiting assembly passes through the blocking portion and is fixedly connected to an external connection unit;

[0011] An alarm trigger unit is also provided on a side of the blocking portion away from the containing box body; the alarm trigger unit is detachably connected to the external connection unit;

[0012] When the external connection unit is dragged in a direction away from the blocking portion, the limit assembly drives the optical fiber trigger assembly to rotate along the first rotation direction until the knocking part of the optical fiber trigger assembly hits the optical fiber unit, completing the first knocking;

[0013] After the first knocking is completed, the reset unit drives the optical fiber trigger assembly to rotate in a direction opposite to the first rotation direction until the knocking part of the optical fiber trigger assembly hits the optical fiber unit again, completing the second knocking.

[0014] Optionally, the limiting assembly includes a limiting ring arranged outside the cavity;

[0015] A first connecting line is connected to one side of the limiting ring, an end of the first connecting line is fixedly connected to the optical fiber trigger component, and the first connecting line is wound around the optical fiber trigger component;

[0016] A second connecting line is connected to the other side of the limiting ring. The second connecting line passes through the blocking portion and is fixedly connected to the external connecting unit.

[0017] Optionally, a second avoidance hole is formed at a position of the blocking portion corresponding to the second connecting line;

[0018] A limiting ball is connected between the second connecting line and the external connecting unit. The limiting ball is arranged between the blocking portion and the external connecting unit and cannot pass through the second avoiding hole.

[0019] Optionally, the optical fiber trigger assembly includes a rotating shaft rotatably connected to the base;

[0020] The rotating shaft is sleeved with a knocking rotator, the reset unit is a reset torsion spring, the reset torsion spring is sleeved on the rotating shaft, the first end of the reset torsion spring is fixedly connected to the knocking rotator, and the second end of the reset torsion spring is fixedly connected to the base;

[0021] The first connecting line is wound around and fixedly connected to the knocking rotator.

[0022] Optionally, the knocking rotator includes a knocking center portion sleeved on the rotating shaft, and two ends of the knocking center portion are respectively protruded with a first knocking portion and a second knocking portion.

[0023] Optionally, the external connection unit is a magnet block.

[0024] Optionally, the base includes a main mounting frame; the blocking portion is protruded from the main mounting frame and the accommodating box body is mounted by bolts.

[0025] An electric power device comprises the optical fiber alarm device as described above.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The optical fiber alarm device and electric power equipment provided by the present invention, when facing an invasion situation, the alarm trigger unit will be dragged, so the external connection unit will be dragged in the direction away from the blocking part, thereby driving the limit assembly to move, thereby driving the optical fiber trigger assembly to rotate in the first rotation direction, so that the optical fiber trigger assembly knocks the optical fiber unit for the first time; and after the external connection unit is dragged a certain distance, the limit assembly abuts against the blocking part, thereby providing a reaction force for the external connection unit, at this time, the external connection unit is no longer dragged due to the reaction force, and then under the action of the reset unit, the reset unit drives the optical fiber trigger assembly to rotate in the direction opposite to the first rotation direction, so that the optical fiber trigger assembly knocks the optical fiber unit for the second time. In the above-mentioned situation of facing an invasion, the optical fiber trigger assembly knocks the optical fiber unit twice at a fixed interval, that is, generates two vibration signals with extremely high recognition, and transmits them to the optical fiber unit, so that an alarm can be realized in the early stage of the invasion, ensuring the alarm efficiency, and compared with infrared systems, electronic manhole covers and other solutions, the cost is lower, and it has the advantages of low cost and high alarm efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0030] Figure 1 A schematic diagram of the overall structure of a fiber optic alarm device provided by an embodiment of the present invention;

[0031] Figure 2 A schematic front view of the structure of the optical fiber alarm device in a first state provided by an embodiment of the present invention;

[0032] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at A;

[0033] Figure 4 A front view structural schematic diagram of the second state of the optical fiber alarm device provided by an embodiment of the present invention.

[0034] Illustrations: 10, base; 11, cavity; 12, movable part; 13, first avoidance hole; 14, second avoidance hole; 15, main mounting frame; 151, blocking part; 16, containing box body;

[0035] 20. Fiber optic trigger assembly; 21. Rotating shaft; 22. Striking rotator; 221. Striking center portion; 222. First striking portion; 223. Second striking portion;

[0036] 30. Limiting assembly; 31. Limiting ring; 32. First connecting line; 33. Second connecting line; 40. Optical fiber unit; 50. External connecting unit; 60. Alarm triggering unit; 70. Limiting ball. DETAILED DESCRIPTION

[0037] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] Please refer to Figures 1 to 4 , Figure 1 The overall structure diagram of the optical fiber alarm device provided by the embodiment of the present invention is as follows: Figure 2 A schematic front view of the structure of the first state of the optical fiber alarm device provided by an embodiment of the present invention, Figure 3 for Figure 2 A local enlarged structural diagram at A. Figure 4 A front view structural schematic diagram of the second state of the optical fiber alarm device provided by an embodiment of the present invention.

[0041] Embodiment 1

[0042] The fiber optic alarm device provided in this embodiment is applied in the field of anti-theft technology, and is mainly applied to equipment equipped with manhole covers and storing cables inside. It can be distinguished from conventional fiber optic alarm means, infrared systems, electronic manhole covers and other solutions, and has the advantages of low cost and high precision.

[0043] like Figure 1 , Figure 2 and Figure 4 As shown, the optical fiber alarm device provided in this embodiment includes a base 10, which includes a accommodating box body 16 with a cavity 11 therein; an optical fiber unit 40 is provided on a side wall of the accommodating box body 16, and one end of the optical fiber unit 40 extends into the cavity 11.

[0044] The optical fiber trigger assembly 20 is rotatably connected in the cavity 11, and is used to knock the optical fiber unit 40 to alarm; the optical fiber trigger assembly 20 is also connected to a reset unit. The optical fiber unit 40 can pass through the bases 10 of multiple groups of optical fiber alarm devices, or each base 10 can be configured with an independent optical fiber unit 40; the reset unit is used to reset the optical fiber trigger assembly 20 after the external force of the optical fiber trigger assembly 20 is removed.

[0045] A blocking portion 151 is disposed outside the housing 16; a limit assembly 30 is disposed between the blocking portion 151 and the housing 16; one end of the limit assembly 30 extends into the cavity 11 and is connected to the optical fiber trigger assembly 20 to drive the optical fiber trigger assembly 20 to rotate; the other end of the limit assembly 30 passes through the blocking portion 151 and is fixedly connected to the external connection unit 50. A movable portion 12 is formed between the blocking portion 151 and the housing 16, and the limit assembly 30 can move up and down in the movable portion 12.

[0046] The side of the blocking portion 151 away from the containing box body 16 is also provided with an alarm trigger unit 60, which is detachably connected to the external connection unit 50. The alarm trigger unit 60 refers to a unit such as a manhole cover, a protective cover, a top cover, etc. that can protect internal cables and other devices.

[0047] When the external connection unit 50 is dragged in a direction away from the blocking portion 151, the limit assembly 30 drives the fiber optic trigger assembly 20 to rotate in the first rotation direction until the knocking portion of the fiber optic trigger assembly 20 contacts the fiber optic unit 40, completing the first knock. In addition, in the initial state, that is, when the external connection unit 50 is not dragged, the external connection unit 50 is supported on the base 10. At this time, the fiber optic trigger assembly 20 will not knock on the fiber optic unit 40, which can specifically refer to the fiber optic trigger assembly 20 not contacting the fiber optic unit 40, or it can continue to contact the fiber optic unit 40 and will not knock on the fiber optic unit 40; wherein, the direction away from the blocking portion 151 specifically refers to the direction of the fiber optic trigger assembly 20. Figure 2 The first direction shown in the figure refers to the vertically upward direction in this embodiment.

[0048] After the first knocking is completed, the reset unit drives the optical fiber trigger assembly 20 to rotate in the direction opposite to the first rotation direction until the knocking part of the optical fiber trigger assembly 20 hits the optical fiber unit 40 again, completing the second knocking. In this embodiment, the first rotation direction refers to the counterclockwise rotation direction, and the direction opposite to the first rotation direction refers to the clockwise rotation direction.

[0049] Specifically, it protects the internal cables and other devices through the alarm trigger unit 60 such as a manhole cover, and the alarm trigger unit 60 is detachably connected to the external connection unit 50. When facing an invasion situation, the alarm trigger unit 60 will be dragged by the illegal person in the first direction, thereby driving the external connection unit 50 to move in the first direction, and at the same time driving the limit assembly 30 to move in the first direction, thereby driving the knocking part of the optical fiber trigger assembly 20 to rotate in the direction close to the optical fiber unit 40; until the limit assembly 30 abuts against the blocking part 151, the optical fiber trigger assembly 20 knocks the optical fiber unit 40 for the first time; at the same time, because the limit assembly 30 abuts against the blocking part 151, a reaction force opposite to the first direction is provided to the external connection unit 50, and the external connection unit 50 is disconnected from the alarm trigger unit 60 under the action of the reaction force; at this time, the external force on the alarm trigger unit 60 is no longer transmitted to the external connection unit 50, so that under the action of the reset unit, the optical fiber trigger assembly 20 is reset and rotated in the reverse direction (i.e. Figure 2 In the clockwise direction in the middle), the optical fiber unit 40 is quickly tapped for the second time. When facing the above-mentioned intrusion situation, the optical fiber trigger component 20 taps the optical fiber unit 40 twice at a fixed interval, that is, two vibration signals with extremely high recognition are generated and transmitted to the optical fiber unit 40, so that an alarm can be realized in the early stage of the intrusion, ensuring the alarm efficiency, and the cost is lower than that of infrared systems, electronic manhole covers and other solutions, and it has the advantages of low cost and high alarm efficiency. Among them, it should be added that since the interval between the two vibration signals is preset and limited by the reset unit, the alarm device can more easily identify the above-mentioned two vibration signals, so that the system can receive the vibration information in the early stage of the intrusion, effectively protecting the internal effect.

[0050] Furthermore, the limiting assembly 30 includes a limiting ring 31 disposed outside the cavity 11 .

[0051] One side of the limiting ring 31 is connected to a first connecting line 32, the first connecting line 32 extends into the cavity 11 and is fixedly connected to the optical fiber trigger assembly 20, and the first connecting line 32 is wound around the optical fiber trigger assembly 20. In addition, as an optional embodiment, one side of the limiting ring 31 is connected to a rack, and the optical fiber trigger assembly 20 includes a gear mounted on its shaft. When the limiting assembly 30 is dragged along the first direction, the rack meshes with the gear, thereby driving the optical fiber trigger assembly 20 to rotate.

[0052] The other side of the limiting ring 31 is connected to a second connecting line 33 . The second connecting line 33 passes through the blocking portion 151 , extends along the first direction to the outside of the movable portion 12 , and is fixedly connected to the external connecting unit 50 .

[0053] Furthermore, a second avoidance hole 14 is formed at a position of the blocking portion 151 corresponding to the second connecting line 33 .

[0054] A limiting ball 70 is connected between the second connecting line 33 and the external connecting unit 50. The limiting ball 70 is disposed between the blocking portion 151 and the external connecting unit 50 and cannot pass through the second avoidance hole 14. When the alarm trigger unit 60 is not dragged, the limiting ball 70 is carried on the blocking portion 151.

[0055] In a specific embodiment, the fiber optic trigger assembly 20 includes a rotating shaft 21 rotatably connected to the base 10 .

[0056] A striking rotator 22 is sleeved on the rotating shaft 21 . The reset unit is a reset torsion spring. The reset torsion spring is sleeved on the rotating shaft 21 . The first end of the reset torsion spring is fixedly connected to the striking rotator 22 , and the second end of the reset torsion spring is fixedly connected to the base 10 .

[0057] The first connecting wire 32 is wound around and fixedly connected to the striking rotator 22 .

[0058] Furthermore, the striking rotator 22 includes a striking center portion 221 sleeved on the rotating shaft 21 , and a first striking portion 222 and a second striking portion 223 are protruded from two ends of the striking center portion 221 .

[0059] Specifically, when the external connection unit 50 is not dragged and is carried on the blocking portion 151, the first knocking portion 222 abuts against the optical fiber unit 40; when the external connection unit 50 is dragged along the first direction, the first knocking portion 222 rotates in a direction away from the optical fiber unit 40, and the second knocking portion 223 rotates in a direction close to the optical fiber unit 40, and the second knocking portion 223 causes a first knock on the optical fiber unit 40; after the alarm trigger unit 60 is disconnected from the external connection unit 50, under the action of the reset unit, the first knocking portion 222 rotates in a direction close to the optical fiber unit 40, and causes a second knock on the optical fiber unit 40; the second knocking portion 223 rotates in a direction away from the optical fiber unit 40.

[0060] It should be supplemented that the reset unit can also be a compression spring, for example, a compression spring connecting the base 10 and the first knocking part 222, when the external connection unit 50 is dragged along the first direction, the compression spring is compressed; after the alarm trigger unit 60 is disconnected from the external connection unit 50, the compression spring resets, so that the first knocking part 222 moves in a direction close to the optical fiber unit 40.

[0061] In other optional embodiments, the fiber optic trigger assembly 20 may further include a central axis, on which is rotatably connected a trigger rod that can be driven to rotate by the limiting assembly 30, one end of the trigger rod being rotatably connected to the central axis, and the other end forming a knocking portion; when the external connection unit 50 is dragged along a first direction, the knocking portion rotates counterclockwise to knock the fiber optic unit 40 from the bottom; after the alarm trigger unit 60 is disconnected from the external connection unit 50, under the action of the reset unit, the knocking portion rotates clockwise to knock the fiber optic unit 40 from the top.

[0062] In an optional embodiment, the external connection unit 50 is a magnet block. It should be supplemented that the external connection unit 50 can also be a convex block with a buckle, and the buckle can be engaged with the corresponding slot on the alarm trigger unit 60.

[0063] Furthermore, the base 10 includes a main mounting frame 15; a blocking portion 151 is protruding from the main mounting frame 15 and a receiving box body 16 is installed by bolts. At the same time, a first avoidance hole 13 is opened at a position of the receiving box body 16 corresponding to the first connecting line 32. A cavity 11 is formed in the receiving box body 16, and a movable portion 12 is formed between the receiving box body 16 and the blocking portion 151.

[0064] In summary, the optical fiber alarm device provided in this embodiment has the advantages of low cost and high alarm efficiency, and also has the advantages of easy detection of intrusion and high detection accuracy.

[0065] Embodiment 2

[0066] This embodiment provides an electric power device, including the above optical fiber alarm device; the alarm trigger unit 60 is detachably connected to the external connection unit 50, and the components that need to be protected from theft, such as cables and electronic components, are arranged on the side of the external connection unit 50 away from the alarm trigger unit 60. The specific structure and technical effects of the optical fiber alarm device are described in the first embodiment, and the electric power device of this embodiment refers to the structure and also has its technical effects.

[0067] In summary, the electric power equipment provided in this embodiment has the advantages of low cost and high alarm efficiency, and also has the advantages of easy detection of intrusion and high detection accuracy.

[0068] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fiber optic alarm device, characterized in that: The invention comprises a base (10), wherein the base (10) comprises a accommodating box body (16) provided with a cavity (11) therein; an optical fiber unit (40) is provided on a side wall of the accommodating box body (16), and one end of the optical fiber unit (40) extends into the cavity (11); An optical fiber trigger component (20) is rotatably connected in the cavity (11) and is used to knock the optical fiber unit (40) to generate an alarm; a reset unit is also connected to the optical fiber trigger component (20); A blocking portion (151) is arranged outside the accommodating box body (16); a limiting assembly (30) is arranged between the blocking portion (151) and the accommodating box body (16); one end of the limiting assembly (30) extends into the cavity (11) and is connected to the optical fiber trigger assembly (20) to drive the optical fiber trigger assembly (20) to rotate; the other end of the limiting assembly (30) passes through the blocking portion (151) and is fixedly connected to an external connection unit (50); An alarm trigger unit (60) is also provided on a side of the blocking portion (151) away from the containing box body (16); the alarm trigger unit (60) is detachably connected to the external connection unit (50); When the external connection unit (50) is dragged in a direction away from the blocking portion (151), the limit assembly (30) drives the optical fiber trigger assembly (20) to rotate along a first rotation direction until the knocking portion of the optical fiber trigger assembly (20) contacts the optical fiber unit (40), thereby completing the first knocking; At this time, the limit assembly (30) abuts against the blocking portion (151), thereby providing a reaction force opposite to the first direction to the external connection unit (50), and the external connection unit (50) is disconnected from the alarm trigger unit (60) under the action of the reaction force; at this time, the external force on the alarm trigger unit (60) is no longer transmitted to the external connection unit (50), so that under the action of the reset unit, the optical fiber trigger assembly (20) is reset and the optical fiber unit (40) is struck for the second time.

2. The optical fiber alarm device according to claim 1, characterized in that: The limiting assembly (30) comprises a limiting ring (31) arranged outside the cavity (11); A first connecting line (32) is connected to one side of the limiting ring (31), an end of the first connecting line (32) is fixedly connected to the optical fiber trigger component (20), and the first connecting line (32) is wound around the optical fiber trigger component (20); The other side of the limiting ring (31) is connected to a second connecting line (33), and the second connecting line (33) passes through the blocking portion (151) and is fixedly connected to the external connecting unit (50).

3. The optical fiber alarm device according to claim 2, characterized in that: The blocking portion (151) is provided with a second avoidance hole (14) at a position corresponding to the second connecting line (33); A limiting ball (70) is connected between the second connecting line (33) and the external connecting unit (50); the limiting ball (70) is arranged between the blocking portion (151) and the external connecting unit (50) and cannot pass through the second avoidance hole (14).

4. The optical fiber alarm device according to claim 2, characterized in that: The optical fiber trigger assembly (20) comprises a rotating shaft (21) rotatably connected to the base (10); The rotating shaft (21) is sleeved with a knocking rotator (22); the reset unit is a reset torsion spring, which is sleeved on the rotating shaft (21); the first end of the reset torsion spring is fixedly connected to the knocking rotator (22); and the second end of the reset torsion spring is fixedly connected to the base (10); The first connecting line (32) is wound around and fixedly connected to the knocking rotator (22).

5. The optical fiber alarm device according to claim 4, characterized in that: The knocking rotator (22) comprises a knocking center portion (221) sleeved on the rotating shaft (21), and a first knocking portion (222) and a second knocking portion (223) are respectively protruded from two ends of the knocking center portion (221).

6. The optical fiber alarm device according to claim 1, characterized in that: The external connection unit (50) is a magnet block.

7. The optical fiber alarm device according to claim 1, characterized in that: The base (10) comprises a main mounting frame (15); the blocking portion (151) is protruding from the main mounting frame (15) and the accommodating box body (16) is mounted via bolts.

8. An electric power device, characterized in that: It comprises the optical fiber alarm device as described in any one of claims 1-7.

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