Arc protection device

Abstract

The invention discloses an arc protection device, which relates to the field of power supply protection, and comprises an arc sensor and a micro arc generator. The micro arc generator is arranged around the arc sensor probe and also comprises a micro motor. The output shaft of the micro motor is fixed with a first contact plate, and the edge of the first contact plate is aligned with a micro switch. The micro motor, the micro switch and the arc sensor are electrically connected with a controller. The initial position of the edge of the first contact plate aligned with the micro switch has a first vacant slot. The invention drives the first contact plate to squeeze the micro switch by periodically turning on the micro motor, so that the controller switches the arc sensor to a simulation detection mode, generates simulated arc light through the operation of the micro arc generator, and is used to judge whether the operation of the arc sensor is abnormal. The arc sensor is automatically and regularly detected, and faults can be fed back in time, thereby improving the stability of the arc sensor operation to a greater extent, and improving the stability of the safety detection of the power system operation.

Description

Technical Field

[0001] The present invention relates to the field of power supply protection, and in particular to an arc protection device. Background Art

[0002] Arc light is a hazardous phenomenon that may occur in power systems, especially arc faults that may occur in medium and low voltage busbars and feeder switchgear. Arc light faults occur when the voltage between two points exceeds the power frequency insulation strength limit, which poses a great hazard to personnel and equipment. In order to reduce the hazards of arc light, it is necessary to set up arc light monitoring and protection facilities in a targeted manner.

[0003] Arc sensors are traditionally installed in the monitoring area of ​​the power system to provide timely feedback on arc generation information, so as to quickly cut off the circuit and reduce the continuous existence of arc. Arc sensors need to be continuously monitored by the power system. However, the power system environment is complex and arc sensors are prone to failure during long-term operation, resulting in failure of the arc monitoring function and potential safety hazards. To ensure the long-term and stable operation of arc sensors, manual simulation tests and inspections are required on the sensors on a regular basis. The maintenance work has high labor costs and low fault feedback efficiency. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the purpose of the present invention is to provide an arc protection device for solving the problems of high cost, great difficulty and untimely fault feedback in traditional manual simulation test of arc sensors.

[0005] In order to solve the problems of the prior art, the technical solution of the present invention is as follows:

[0006] An arc protection device comprises an arc sensor and a micro arc generator, wherein the micro arc generator is arranged around the arc sensor probe, and further comprises a micro motor, wherein a first contact plate is fixed to an output shaft of the micro motor, a micro switch corresponding to a position is arranged at an edge of the first contact plate, the micro motor, the micro switch and the arc sensor are electrically connected to a controller, and a first vacant slot is provided at an edge position of the first contact plate corresponding to an initial position of the micro switch;

[0007] When the arc sensor is simulated, the micro arc generators at different angles are operated in turn to detect the monitoring performance of the arc sensor in different angles. The position switches are used to locate the position information of each micro arc generator. The micro motor drives the ring shell to drive the touch plate to rotate. The touch plate contacts each touch handle in turn. The touch handle contacted by the touch plate will push the carrier block and the moving electrode column to move. The carrier block touch position switch feeds back the position information to the controller. The moving electrode column contacts the fixed electrode column, so that the circuit of the micro arc generator at this position is connected to work. The monitoring status of the arc sensor at each position angle is analyzed by the controller and the computer system, and a comprehensive judgment is made as to whether the operation of the arc sensor is abnormal.

[0008] Preferably, the outer sleeve of the arc sensor is provided with a panel, the surface of the arc sensor has a retaining ring that abuts against the back of the panel, the surface of the arc sensor is threadedly connected with a ring cap that abuts against the front surface of the panel, the retaining ring and the panel squeeze and limit the position of the panel, and the micro arc generator is arranged on the front surface of the panel.

[0009] Preferably, there are a plurality of micro arc generators, and the micro arc generators are evenly distributed in a ring around the front surface of the panel, and the micro arc generators are powered by a circuit switch.

[0010] Preferably, the circuit switch includes a shell, one end of which is provided with a fixed electrode column connected to the micro arc generator, a carrier block is elastically slidable inside the shell, a moving electrode column whose position corresponds to the fixed electrode column is provided on the surface of the carrier block, the moving electrode column is connected to the mains, the carrier block is connected to a touch handle, the back of the panel is rotatably connected to a ring shell, a touch plate is fixed on the surface of the ring shell, the ring shell is connected to the micro motor through a gear set, the micro motor drives the ring shell to drive the touch plate to rotate and contact each touch handle in turn, so that the moving electrode column contacts the fixed electrode column, and the micro arc generator works in turn.

[0011] Preferably, a position switch is provided on the surface of the housing, and the position switch is electrically connected to the controller. When the touch plate contacts the touch handle, the carrier moves to press the position switch.

[0012] Preferably, the first contact plate and the annular shell have the same rotation period.

[0013] Preferably, the first contact plate is coaxially fixed with a second contact plate, a push switch corresponding to the position is arranged on the edge of the second contact plate, the edge position of the second contact plate corresponds to the initial position of the push switch and has a second empty slot, and the moving electrode column is connected to the mains via the push switch.

[0014] Preferably, a plurality of reflective plates are distributed in a ring shape on the front surface of the panel, and the reflective plates are inclined toward the probe direction of the arc sensor.

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] 1. The present invention periodically turns on a micro motor to drive the first contact plate to squeeze the micro switch, so that the controller switches the arc sensor to the analog detection mode, and generates simulated arc light through the operation of the micro arc generator, which is used to determine whether the operation of the arc sensor is abnormal. The arc sensor is automatically and regularly detected, and faults can be fed back in time, thereby greatly improving the stability of the arc sensor operation and the stability of the safety detection of the power system operation.

[0017] 2. The present invention arranges a plurality of miniature arc generators at different angles around the arc sensor probe, controls the miniature arc generators to work one by one to generate simulated arc light, and can perform simulated detection on the arc sensor in various angles and directions, thereby improving the accuracy of fault detection of the arc sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is one of the overall structural schematic diagrams of the present invention.

[0019] Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0020] Figure 3 This is one of the circuit switch state diagrams of the present invention.

[0021] Figure 4 This is the second schematic diagram of the circuit switch state of the present invention.

[0022] Figure 5 It is a schematic diagram of the distribution of the micro switches and push switches of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the first touch plate and the second touch plate of the present invention.

[0024] Figure 7 It is a schematic diagram of the panel installation structure of the present invention.

[0025] Figure numerals: 1. arc sensor; 11. retaining ring; 12. ring cap; 2. panel; 3. micro arc generator; 4. micro motor; 5. circuit switch; 51. housing; 52. fixed electrode column; 53. carrier block; 54. moving electrode column; 55. touch handle; 56. position switch; 6. ring shell; 61. touch plate; 7. first touch disk; 71. micro switch; 8. second touch disk; 81. push switch; 9. reflector. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] like Figure 1 , Figure 2 , Figure 7 As shown, the simulation test device of the arc sensor 1 is mainly arranged at the probe part of the arc sensor 1, the panel 2 is sleeved on the outside of the arc sensor 1, the probe of the arc sensor 1 is located at the front surface of the panel 2, the surface of the arc sensor 1 has a retaining ring 11 that contacts the back of the panel 2, the ring cap 12 is threadedly connected to the surface of the arc sensor 1 and contacts the front surface of the panel 2, and the panel 2 and the arc sensor 1 are fixed by squeezing the retaining ring 11 and the ring cap 12;

[0028] A micro arc generator 3 is installed on the front surface of the panel 2. The micro arc generator 3 is a small-volume, low-current arc generating device that generates an arc between two electrodes through a high-voltage, high-frequency current. It belongs to the prior art and will not be described in detail here.

[0029] like Figure 2 , Figure 5 , Figure 6 As shown, a micro motor 4 and a micro switch 71 are installed on the surface of the arc sensor 1, a first contact plate 7 is fixed at the output end of the micro motor 4, an edge of the first contact plate 7 corresponds to the touch position of the micro switch 71, a first vacant slot is provided at the edge position of the first contact plate 7 corresponding to the initial position of the micro switch 71, and the micro motor 4, the micro switch 71, and the arc sensor 1 are electrically connected to the controller;

[0030] The arc sensor 1 works in two modes. The first mode is to monitor the arc of the power system normally and feed back the monitoring information to the controller so that the protection terminal responds. The second mode is a simulation test mode. In this mode, the information monitored by the arc sensor 1 is fed back to the controller and the computer processing unit for collecting and analyzing the information fed back by the arc sensor 1. It will not trigger the protection terminal to respond.

[0031] The first vacant slot position at the initial position corresponds to the micro switch 71, and the micro switch 71 is not touched. At this time, the arc sensor 1 is in the first working mode, which is used to ensure the safety of the power system. The second working mode is programmed by the controller to be executed regularly, that is, the arc sensor 1 is regularly detected for faults. The controller programs the micro motor 4 to work regularly, and the duration of each work is one rotation of the first contact plate 7. When the micro motor 4 drives the first contact plate 7 to rotate, the micro switch 71 is touched by the edge of the first contact plate 7. At this time, the controller receives the electrical signal of the micro switch 71, switches the arc sensor 1 to the second working mode, and supplies power to the micro arc generator 3 to generate arc light. The controller and the computer processing unit analyze whether the arc sensor 1 detects the arc light signal to determine whether the arc sensor 1 is working normally. When the first contact plate 7 rotates one circle and the first vacant slot is repositioned to correspond to the micro switch 71, the detection process ends.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, there are multiple micro arc generators 3, and the micro arc generators 3 are evenly distributed in an annular shape around the front surface of the panel 2. The micro arc generators 3 are powered by a circuit switch 5, which includes a shell 51. A fixed electrode column 52 connected to the micro arc generator 3 is arranged at one end of the shell 51. A carrier block 53 is elastically slidable inside the shell 51. A movable electrode column 54 corresponding to the fixed electrode column 52 is arranged on the surface of the carrier block 53. The movable electrode column 54 is connected to the mains. A touch handle 55 is fixedly connected to the carrier block 53. An annular shell 6 is rotatably installed on the back of the panel 2. A touch plate 61 is fixed on the surface of the annular shell 6. The annular shell 6 is connected to the micro motor 4 through a gear set transmission. A position switch 56 is arranged on the surface of the shell 51. The position switch 56 is electrically connected to the controller.

[0033] When the arc sensor 1 is simulated, the micro arc generators 3 at different angles are operated in turn to detect the monitoring performance of the arc sensor 1 at different angles. The position switches 56 are used to locate the position information of each micro arc generator 3. The micro motor 4 drives the ring shell 6 to drive the touch plate 61 to rotate. The touch plate 61 contacts each touch handle 55 in turn. The touch handle 55 contacted by the touch plate 61 will push the carrier block 53 and the moving electrode column 54 to move. The carrier block 53 touches the position switch 56 to feedback the position information to the controller. The moving electrode column 54 contacts the fixed electrode column 52, so that the circuit of the micro arc generator 3 at this position is connected to work. The monitoring status of the arc sensor 1 at each position angle is analyzed by the controller and the computer system, and a comprehensive judgment is made as to whether the operation of the arc sensor 1 is abnormal.

[0034] The first contact plate 7 and the ring shell 6 have the same rotation period. Each time the detection work is performed, the first contact plate 7 and the ring shell 6 rotate synchronously for one circle, so that all the micro arc generators 3 work one time in sequence.

[0035] like Figure 2 , Figure 5 , Figure 6 As shown, the first contact plate 7 is coaxially fixed with the second contact plate 8, the push switch 81 and the micro switch 71 are installed side by side on the surface of the arc sensor 1, the edge of the second contact plate 8 is provided with a push switch 81 corresponding to the position, the edge position of the second contact plate 8 corresponds to the initial position of the push switch 81 and has a second vacant slot, and the moving electrode column 54 is connected to the mains through the push switch 81;

[0036] When the arc sensor 1 is in the first mode and normally monitors the arc in the power system, the push switch 81 is aligned with the second vacant slot and is not touched. At this time, the circuits of each micro arc generator 3 are in an open circuit state, which improves working safety. When the arc sensor 1 is simulated for detection, the second contact plate 8 is used to resist and squeeze the push switch 81 to connect the circuit and prepare for the operation of the micro arc generator 3.

[0037] like Figure 1 As shown, a plurality of reflectors 9 are distributed in a ring shape on the front surface of the panel 2. The symmetrical positions of the reflectors 9 are offset from the micro arc generator 3. The reflectors 9 are inclined toward the probe direction of the arc sensor 1. The reflectors 9 are used to reflect arc light toward the probe part of the arc sensor 1, thereby improving the arc light capturing effect of the arc sensor 1 in the first working mode.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An arc protection device, characterized in that: include: An arc sensor (1) and a micro arc generator (3), wherein the micro arc generator (3) is arranged around a probe of the arc sensor (1), and further comprises a micro motor (4), wherein a first contact plate (7) is fixed to an output shaft of the micro motor (4), a micro switch (71) corresponding to a position is arranged at an edge of the first contact plate (7), the micro motor (4), the micro switch (71), and the arc sensor (1) are electrically connected to a controller, and a first empty slot is provided at an edge position of the first contact plate (7) corresponding to an initial position of the micro switch (71); When the arc sensor (1) is subjected to analog detection, the micro arc generators (3) at different angles are operated in sequence to detect the monitoring performance of the arc sensor (1) at different angles. The position switches (56) are used to locate the position information of each micro arc generator (3). The micro motor (4) drives the ring shell (6) to drive the touch plate (61) to rotate. The touch plate (61) contacts each touch handle (55) in sequence. The touch handle (55) contacted by the touch plate (61) pushes the carrier block (53) and the movable electrode column (54) to move. The carrier block (53) contacts the position switch (56) to feed back the position information to the controller. The movable electrode column (54) contacts the fixed electrode column (52), so that the circuit of the micro arc generator (3) at the position is connected to work. The monitoring status of the arc sensor (1) at each position angle is analyzed by the controller and the computer system, and a comprehensive judgment is made as to whether the operation of the arc sensor (1) is abnormal.

2. The arc protection device according to claim 1, characterized in that: The arc sensor (1) is externally sleeved with a panel (2); the surface of the arc sensor (1) has a retaining ring (11) that contacts the back of the panel (2); the surface of the arc sensor (1) is threadedly connected to a ring cap (12) that contacts the front surface of the panel (2); the retaining ring (11) and the panel (2) squeeze and limit the position of the panel (2); and the micro arc generator (3) is arranged on the front surface of the panel (2).

3. The arc protection device according to claim 2, characterized in that: There are a plurality of micro arc generators (3), and the micro arc generators (3) are evenly distributed in a ring shape around the front surface of the panel (2). The micro arc generators (3) are powered by a circuit switch (5).

4. The arc protection device according to claim 3, characterized in that: The circuit switch (5) comprises a housing (51), one end of which is provided with a fixed electrode column (52) connected to the micro arc generator (3), a carrier block (53) elastically slidingly disposed inside the housing (51), a movable electrode column (54) corresponding in position to the fixed electrode column (52) disposed on the surface of the carrier block (53), the movable electrode column (54) being connected to the mains, the carrier block (53) being connected to a contact handle (55), a ring housing (6) being rotatably connected to the back of the panel (2), a contact plate (61) being fixed on the surface of the ring housing (6), the ring housing (6) being connected to the micro motor (4) through a gear train, the micro motor (4) driving the ring housing (6) to drive the contact plate (61) to rotate and sequentially contact the respective contact handles (55), so that the movable electrode column (54) contacts the fixed electrode column (52), and the micro arc generator (3) is operated sequentially.

5. The arc protection device according to claim 4, characterized in that: A position switch (56) is provided on the surface of the housing (51), and the position switch (56) is electrically connected to a controller. When the touch plate (61) contacts the touch handle (55), the carrier block (53) moves to press the position switch (56).

6. The arc protection device according to claim 4, characterized in that: The first contact disc (7) and the annular shell (6) have the same rotation period.

7. The arc protection device according to claim 4, characterized in that: The first contact disc (7) is coaxially fixed with a second contact disc (8); a push switch (81) corresponding in position is provided on the edge of the second contact disc (8); a second empty slot is provided at the edge of the second contact disc (8) corresponding to the initial position of the push switch (81); and the movable electrode column (54) is connected to the mains via the push switch (81).

8. The arc protection device according to claim 2, characterized in that: A plurality of reflective plates (9) are distributed in an annular manner on the front surface of the panel (2), and the reflective plates (9) are inclined in the direction of the probe of the arc sensor (1).

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