CN117250397A - An abnormal current monitoring device - Google Patents

Abstract

The invention discloses a current abnormal condition monitoring device which comprises a shell, wherein a dial and two wire inserting holes are formed in the front surface of the shell, a movable clamping piece is arranged in each wire inserting hole, a pointer is arranged below each dial, the pointer is rotatably arranged on the shell, a driving piece for driving the pointer to rotate is arranged on the inner side of the shell, each driving piece comprises a magnet, a pole shoe, a spiral spring, an aluminum frame and a rotating shaft, the two pole shoes are fixed on two sides of the magnet, one side of each pole shoe opposite to the corresponding pole shoe is an arc surface, the aluminum frame and the arc surface of each pole shoe are concentrically arranged, and the aluminum frame is rotatably arranged in the shell through the rotating shaft.

Description

An abnormal current monitoring device

Technical field

The invention discloses a current abnormality monitoring device, which belongs to the technical field of electrical monitoring components.

Background technique

With the development of the economy, different loads are used in both households and enterprises. When abnormal current is transmitted to the load, there is a risk of fire or the service life of the load is affected. Currently, many current monitors have been developed when measuring abnormal currents to reduce such risks. Most of the existing monitoring devices use measuring meters to determine the size of the measured current. This type of measurement cannot transmit the current quickly and intuitively. Abnormal signals, the overall practicality needs to be improved.

Contents of the invention

The purpose of the present invention is to provide a current abnormality monitoring device to solve the problems in the prior art.

The present invention achieves the above object through the following technical solutions: a device for monitoring abnormal current conditions, which includes a housing. The front of the housing is provided with a dial and two plug-in holes, and a movable card is provided in the plug-in hole. Fasteners, a pointer is provided below the dial, and the pointer is mounted on the housing for rotation. A driving member for driving the pointer to rotate is provided inside the housing. The driving member includes a magnet, a pole shoe, and a coil spring. , aluminum frame and rotating shaft. There are two pole shoes and they are fixed on both sides of the magnet. The opposite sides of the two pole shoes are arc surfaces. The aluminum frame and the arc surfaces of the pole shoes are arranged concentrically. , and the aluminum frame is rotated and installed in the housing through the rotating shaft. There are a number of turns of coils wound on the aluminum frame along its length direction. The spiral spring is sleeved on the outside of the rotating shaft, and one end of it is fixedly connected to the rotating shaft, and the other end is connected to the rotating shaft. The shell is fixedly connected, and both ends of the coil are electrically connected to the movable clamping piece. The shell is provided with a ring on the outside corresponding to the rotating shaft. The ring is provided with three sets of arc-shaped conductive sheets. The pointer is One end is fixed on the rotating shaft, and the pointer has a conductive piece connected to one of the groups of arc-shaped conductive sheets. The housing is provided with three indicator lights of different colors. The three types of indicator lights and the three groups of arc-shaped conductive sheets There is a one-to-one electrical connection, and the indicator light is connected in parallel with the coil.

Preferably, the three groups of arc-shaped conductive sheets are the first conductive sheet, the second conductive sheet and the third conductive sheet. The first conductive sheet, the second conductive sheet and the third conductive sheet are arranged in order, and the three conductive sheets are There are two of them, the second conductive sheet, the first conductive sheet and the third conductive sheet have insulating coatings that conflict with each other, and the three are provided with terminals penetrating the ring, and the first conductive sheet and the first conductive sheet are When the first color indicator light is energized, it is used to transmit a signal that the current in the coil is less than the normal value range. When the second conductive sheet and the second color indicator light are energized, it is used to transmit a signal that the current in the coil is within the normal value range. , when the third conductive piece is energized with the indicator light of the third color, it is used to transmit a signal that the current in the coil is greater than the normal value range.

Preferably, the pointer includes a needle body part and a conductive part, one end of the needle body part is fixedly connected to the conductive part, the conductive part includes a first limiting bolt, a first spring and a sliding block, and the first limiting part The positioning bolt passes through the conductive part and is fixedly connected to the sliding block. The first spring is sleeved on the first limiting bolt, and its two ends are in conflict with the conductive part and the sliding block respectively. The sliding block is in conflict with the arc-shaped conductive piece. One end has a spherical structure.

Preferably, the rotating shaft includes rotating rods located on both sides of the aluminum frame, and a cable tray is provided between the rotating rod and the aluminum frame. The cable tray and the aluminum frame are fixed by bolts, and the middle part of the cable tray A through slot is provided for the coil to pass through, the rotating rod is rotationally connected to the housing, and the rotating rod and the wire harness are fixedly connected through bolts.

Preferably, a timing circuit is also provided in the housing. The timing circuit includes a monostable circuit composed of a 555 timing chip and a relay. The relay includes a relay coil and a relay normally open contact. The output of the 555 timing chip The terminal is coupled to the relay coil, and the normally open contact of the relay is coupled to the power supply terminal of the coil.

Preferably, three resistors with different resistance values are connected in parallel at both ends of the coil, and a movable adjustment member for controlling the energization state of the resistors and the coil is provided in the housing.

Preferably, the movable adjustment member includes a sliding seat, a limiting piece, a pressing rod, a second spring, a third spring and a fixed wire seat, and a cavity for installing the sliding seat and the limiting piece is provided in the housing, so The sliding seat is fixedly connected to the housing, and the sliding seat is provided with a chute for the limiting piece to slide. One side of the limiting piece is provided with a limiting boss for positioning the second spring, and the limiting piece is provided with There are first notches, second notches, third notches and fourth notches distributed at equal intervals. There are four pressing rods and third springs, and they are respectively connected with the first notches and the second notches. The opening, the third notch and the fourth notch are arranged correspondingly. The pressing rod has a T-shaped structure, and one end is located in the cavity, and the other end extends to the outside of the housing and is provided with a button. The third spring is sleeved in The outside of the pressing rod has its two ends in conflict with the button and the housing respectively. The three pressing rods are all provided with mounting pieces for fixing resistors. The second notch, the third notch and the fourth notch are Located below the three resistors, there are six fixed wire bases, and they are correspondingly arranged on both sides of the second notch, the third notch and the fourth notch. The two ends of the coil are respectively connected to the same On the fixed wire seats on both sides of the notch, the second notch, the third notch and the fourth notch are all provided with limiting bayonet for blocking the upward movement of the pressing rod, and the first notch, the second notch The mouth, the third notch and the fourth notch are all provided with guide slopes that cooperate with the pressing rod, and the projected lengths of the four guide slopes in the sliding direction of the limiting piece are set according to rules.

Preferably, the mounting piece includes a mounting piece and a second limiting bolt. The second limiting bolt is provided with an anti-rotation portion of a non-circular structure, and the second limiting bolt passes through the mounting piece and is in contact with the pressing rod. Threaded connection, the mounting piece is provided with a metal piece, the resistor is set in the middle of the metal piece, and the two ends of the metal piece and the fixed wire base are provided with wiring bolts.

Preferably, the movable clamping member includes a cover plate, a movable block, a fourth spring and a conductive voltage member. The movable block is slidably installed in the housing, and the movable block is provided with a pressing protrusion extending to the outside of the cover plate. Both ends of the fourth spring are in conflict with the housing and the movable block respectively. The conductive voltage member has a semicircular structure and one end is fixedly connected to the movable block. The two conductive voltage members are electrically connected to the two ends of the coil. connect.

Compared with the prior art, the beneficial effects of the present invention are:

By arranging the housing, the driving part, the pointer, the arc-shaped conductive piece, the conductive part and the indicator light, when the coil is energized, the coil and the pointer rotate at a certain angle, so that the conductive part follows the pointer and rotates at the same angle, and with the corresponding The arc-shaped conductive sheet realizes the connection of the circuit, so that the indicator light lights up, thereby quickly and intuitively transmitting the signal of the current flowing through the coil, so that abnormal current conditions can be monitored in real time.

By setting up a timing circuit and an movable regulator, the timing circuit can control the timing on and off of the coil circuit, thereby monitoring the current at regular intervals, allowing the coil spring to compress and rebound repeatedly to avoid maintaining the same state for a long time and affecting its use. The movable adjustment component allows the monitoring device to monitor a wider range of currents by connecting resistors with different resistance values in parallel at both ends of the coil, thereby expanding its range of use and is simple and convenient to operate.

Description of drawings

Figure 1 is a schematic structural diagram of a current abnormality monitoring device according to the present invention;

Figure 2 is a schematic diagram of the internal structure of a current abnormality monitoring device according to the present invention;

Figure 3 is a schematic structural diagram of the pointer and driving member in the present invention;

Figure 4 is a schematic structural diagram of the rotating shaft, coil spring and aluminum frame in the present invention;

Figure 5 is a schematic structural diagram of the arc-shaped conductive sheet, conductive parts and ring in the present invention;

Figure 6 is a schematic structural diagram of the movable adjustment member in the present invention;

Figure 7 is a schematic structural diagram of the pressing rod and mounting member in the present invention;

Figure 8 is a partial cross-sectional view of the movable clamping member and the housing in the present invention;

Figure 9 is a circuit schematic diagram of a current abnormality monitoring device in the present invention;

Reference signs: 1. Housing; 2. Dial; 3. Indicator light; 4. Button; 5. Wire insertion hole; 6. Pointer; 7. Rotary shaft; 8. Movable adjustment piece; 9. Ring; 10. Arc-shaped conductive piece; 11. Needle body part; 12. Conductive part; 13. Coil; 14. Magnet; 15. Pole shoe; 16. Rotary rod; 17. Coil spring; 18. Aluminum frame; 19. Through slot; 20 , first conductive piece; 21. sliding block; 22. first limiting bolt; 23. second conductive piece; 24. third conductive piece; 25. first spring; 26. terminal; 27. second spring; 28. Limiting boss; 29. Slide groove; 30. Sliding slope; 31. First notch; 32. Second notch; 33. Third notch; 34. Fourth notch; 35. Sliding seat ; 36. Limiting piece; 37. Limiting bayonet; 38. Third spring; 39. Installation piece; 40. Wire harness; 41. Resistor; 42. Fixed wire base; 43. Pressing rod; 44. Terminal bolts ; 45. Installation piece; 46. Anti-rotation part; 47. Second limit bolt; 48. Metal sheet; 49. Fourth spring; 50. Movable block; 51. Cover plate; 52. Pressing boss; 53. Guide Voltage parts; 54. Timing circuit; 55. Conductive parts.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

As shown in Figures 1 to 9, a current abnormality monitoring device includes a housing 1. The front of the housing 1 is provided with a dial 2 and two plug holes 5. A movable clamp is provided in the plug holes 5. A pointer 6 is provided below the dial 2. The pointer 6 is mounted on the housing 1 for rotation. A driving part for driving the pointer 6 to rotate is provided inside the housing 1. The driving part includes a magnet 14, a pole piece 15, and a coil spring 17. , aluminum frame 18 and rotating shaft 7, two pole shoes 15 are provided and fixed on both sides of the magnet 14. The opposite sides of the two pole shoes 15 are arc surfaces, and the aluminum frame 18 and the arc surface of the pole shoes 15 are concentric is set, and the aluminum frame 18 is installed in the housing 1 through rotation of the rotating shaft 7. A number of turns of coils 13 are wound on the aluminum frame 18 along its length direction. The coil spring 17 is set on the outside of the rotating shaft 7, and one end thereof is connected to the rotating shaft 7. Fixed connection, the other end is fixedly connected to the housing 1, the two ends of the coil 13 are electrically connected to the movable clamping piece, the housing 1 is provided with a ring 9 on the outside corresponding to the rotating shaft 7, and three sets of arc-shaped conductive rings are provided on the ring 9 piece 10, one end of the pointer 6 is fixed on the rotating shaft 7, and the pointer 6 has a conductive piece 55 connected with a group of arc-shaped conductive pieces 10, and the housing 1 is provided with three indicator lights 3 of different colors, three indications The lamp 3 is electrically connected to three sets of arc-shaped conductive sheets 10 in one-to-one correspondence, and the indicator lamp 3 is connected in parallel with the coil 13 .

As shown in Figure 3, Figure 4 and Figure 5, the three groups of arc-shaped conductive sheets 10 are the first conductive sheet 20, the second conductive sheet 23 and the third conductive sheet 24. The first conductive sheet 20, the second conductive sheet 23 and the third conductive sheet 24. The third conductive sheets 24 are arranged in order, and there are two of the three. The second conductive sheets 23, the first conductive sheets 20 and the third conductive sheets 24 have insulating coatings that conflict with each other, and the three are provided with penetrating rings. The terminal 26 of 9 is used to transmit the signal that the current in the coil 13 is less than the normal value range when the first conductive sheet 20 is energized with the indicator light 3 of the first color, and the second conductive sheet 23 is connected to the indicator light 3 of the second color. When the current in the coil 13 is energized, it is used to transmit a signal that the current in the coil 13 is within the normal value range. When the third conductive sheet 24 is energized with the indicator light 3 of the third color, it is used to transmit a signal that the current in the coil 13 is greater than the normal value range. The indicator lights 3 of three colors can be set to green, yellow and red. The yellow indicator light 3 is electrically connected to the two first conductive sheets 20. When the current to be monitored is less than the normal value range, the pointer 6 rotates to the first conductive plate. The range of the piece 20 makes the yellow indicator light 3 light up, and the green indicator light 3 is electrically connected to the two second conductive pieces 23. When the current to be monitored is within the normal range, the pointer 6 rotates to the second conductive piece 23. range, so that the green indicator light 3 lights up, and the red indicator light 3 is electrically connected to the two third conductive sheets 24. When the current to be monitored is greater than the normal value range, the pointer 6 rotates to the range of the third conductive sheet 24, so that The red indicator light 3 lights up. This design makes it easy to quickly and intuitively see the abnormality of the current to be monitored from a distance. The coating on both sides of the second conductive sheet 23 can block it from the first conductive sheet 20 and the third conductive sheet 24. The interconnection of circuits between each other.

As shown in Figures 2, 3 and 5, the pointer 6 includes a needle body 11 and a conductive part 12. One end of the needle body 11 is fixedly connected to the conductive part 12. The conductive member 55 includes a first limiting bolt 22, a first The spring 25 and the sliding block 21, the first limiting bolt 22 passes through the conductive part 12 and is fixedly connected to the sliding block 21. The first spring 25 is sleeved on the first limiting bolt 22, and its two ends are respectively connected to the conductive part 12 and the sliding block 21. The sliding block 21 resists, and the end of the sliding block 21 that resists the arc-shaped conductive sheet 10 has a spherical structure. The conductive member 55 is equivalent to a movable switch, which can control the indicator lights 3 of different colors to light up. The first spring 25 exerts a force on the sliding block 21 force, so that one end of the sliding block 21 can always remain in conflict with the first conductive sheet 20, the second conductive sheet 23 or the third conductive sheet 24. Even if the sliding block 21 is worn, the circuit in the indicator light 3 can still be connected. .

As shown in Figures 3 and 4, the rotating shaft 7 includes rotating rods 16 located on both sides of the aluminum frame 18. A cable tray 40 is also provided between the rotating rod 16 and the aluminum frame 18. The cable tray 40 and the aluminum frame 18 are connected by bolts. fixed, and a through slot 19 for the coil 13 to pass through is provided in the middle of the wire harness disk 40, the rotating rod 16 is rotationally connected to the housing 1, and the rotating rod 16 and the wire harness disk 40 are fixedly connected by bolts, and the coil 13 is wound around When the aluminum frame 18 is on, the slot 19 on the cable tray 40 can act as a wire bundle, so that the coil 13 can be wound as concentratedly as possible, and the rotating rod 16 adopts a split connection design with the cable tray 40 and the aluminum frame 18 , which can facilitate the disassembly and assembly of the driving parts.

As shown in Figures 1 and 9, the housing 1 is also provided with a timing circuit 54. The timing circuit 54 includes a monostable circuit composed of a 555 timing chip and a relay. The relay includes a relay coil and a normally open contact of the relay. The 555 timing chip The output end of the relay is coupled to the relay coil. The normally open contact of the relay is coupled to the power supply end of the coil 13. A timing circuit 54 is set. When the positive terminal of the external circuit supplies power to the timing circuit 54, the output of the 555 timing chip is From low level to high level, the relay coil K1 is in the working state. The normally open contact K1 of the relay is closed and outputs the working signal, causing the coil 13 circuit to pass current. At this time, the pointer 6 starts to rotate. At the same time, The 7th pin of the 555 timing chip is internally cut off, and the power supply can charge the capacitor C2 through R6. This is the starting state of the timing process. When the voltage of the capacitor C2 rises to 2/3 of the power supply voltage, the 555 timing chip's 7th pin Pin 7 discharges the capacitor C2, causing the high level output by pin 3 to change to a low level. The relay coil K1 is released and no longer outputs the working signal. The coil 13 circuit is powered off, and the pointer 6 rotates under the action of the coil spring 17. , the timing circuit 54 can be used to periodically monitor the current of the circuit to be monitored, so that the pointer 6 can rotate and rotate normally, and the coil spring 17 does not need to maintain a large compression state all the time, which can not only achieve the effect of current monitoring, but also extend the The service life of the monitoring device and the duration of regular monitoring can be controlled according to the size of R6 and C2.

As shown in Figure 2, Figure 6 and Figure 7, there are three resistors 41 with different resistances connected in parallel at both ends of the coil 13. The casing 1 is provided with a movable adjustment member 8 for controlling the energization state of the resistor 41 and the coil 13. The movable adjustment Part 8 includes a sliding seat 35, a limiting piece 36, a pressing rod 43, a second spring 27, a third spring 38 and a fixed wire base 42. The housing 1 is provided with a cavity for installing the sliding seat 35 and the limiting piece 36. , the sliding seat 35 is fixedly connected to the housing 1, and the sliding seat 35 is provided with a chute 29 for the limiting piece 36 to slide, and one side of the limiting piece 36 is provided with a limiting boss 28 for positioning the second spring 27. , and the limiting piece 36 is provided with the first notch 31, the second notch 32, the third notch 33 and the fourth notch 34 distributed equally, and the pressing rod 43 and the third spring 38 are each provided with four, And respectively corresponding to the first notch 31 , the second notch 32 , the third notch 33 and the fourth notch 34 , the pressing rod 43 has a T-shaped structure, and one end is located in the cavity, and the other end extends to the housing 1 There is also a button 4 on the outside, and a third spring 38 is set on the outside of the pressing rod 43, and its two ends are in conflict with the button 4 and the housing 1 respectively. The three pressing rods 43 are all provided with installations for fixing the resistor 41. 39, the second notch 32, the third notch 33 and the fourth notch 34 are located below the three resistors 41. There are six fixed wire bases 42, and they are correspondingly arranged in the second notch 32, the third notch 39. On both sides of the opening 33 and the fourth notch 34, the two ends of the coil 13 are respectively connected to the fixed wire bases 42 on both sides of the same notch. The second notch 32, the third notch 33 and the fourth notch 34 The first notch 31 , the second notch 32 , the third notch 33 and the fourth notch 34 are all provided with limiting bayonet 37 for blocking the upward movement of the pressing rod 43 . The matching guide slopes 30 and the projection lengths of the four guide slopes 30 in the sliding direction of the limiting piece 36 are set according to rules. The mounting piece 39 includes the mounting piece 45 and the second limiting bolt 47. The second limiting bolt 47 is An anti-rotation part 46 with a non-circular structure is provided, and the second limiting bolt 47 is threadedly connected to the pressing rod 43 after passing through the mounting piece 45. The mounting piece 45 is provided with a metal sheet 48, and the resistor 41 is arranged on the metal sheet 48. In the middle, connecting bolts 44 are provided on both ends of the metal sheet 48 and the wire-fixing base 42. The projection length of the guide slope 30 on the first notch 31 is the largest, while the second notch 32, the third notch 33 and the The projected length of the guide slope 30 on the fourth notch 34 increases successively. When the pressing rod 43 corresponding to the second notch 32 is pressed, the resistor 41 on the pressing rod 43 moves downward simultaneously, and the pressing rod 43 moves along the The guide slope 30 slides into the second notch 32 and forces the limiting piece 36 to slide to one side to compress the second spring 27. When the pressing rod 43 slides to the bottom of the second notch 32, the second spring 27 drives the limiting piece. The piece 36 is reset, so that the pressing rod 43 is stuck in the limiting bayonet 37. At this time, the pressing rod 43 cannot be reset under the action of the third spring 38, and the resistor 41 is connected to the two fixed wire bases 42 through the metal piece 48, so that The resistor 41 can be connected in parallel at both ends of the coil 13, and the pressing rod 43 corresponding to the third notch 33 and the fourth notch 34, when the two resistors 41 are incorporated into the two ends of the coil 13, due to the guide slope 30 The projection lengths are different, and when the limit piece 36 slides, the previous pressing rod 43 is separated from the limit bayonet 37 and resets, thereby achieving the effect of only connecting one resistor 41 in parallel or not connecting the resistor 41 in parallel. In this way, by incorporating Resistors 41 with different resistance values enable the monitoring device to monitor a wider current range, thereby expanding its use range.

As shown in Figures 2 and 8, the movable clamping member includes a cover plate 51, a movable block 50, a fourth spring 49 and a conductive voltage member 53. The movable block 50 is slidably installed in the housing 1, and is provided with a The pressing protrusion 52 extends to the outside of the cover plate 51, and both ends of the fourth spring 49 respectively conflict with the housing 1 and the movable block 50. The conductive voltage member 53 has a semicircular structure, and one end is fixedly connected to the movable block 50. A conductive voltage piece 53 is electrically connected to both ends of the coil 13. By pressing the pressing protrusion 52, the movable block 50 slides in the housing 1 and drives the conductive voltage piece 53 to move synchronously. When the positive and negative poles of the external power supply are plugged in, After the wire post is inserted into the wire plug hole 5 and the pressing protrusion 52 is released, the conductive voltage member 53 is reset under the action of the fourth spring 49 and presses the wire plug post so that the wire plug cannot be separated from the wire plug hole 5 outwards. , to avoid looseness.

Working principle: Insert the positive and negative poles of the circuit to be monitored into the jack, first press the protrusion 52 and then release. Use the conductive piece 53 to fix the positive and negative poles and connect them to the coil 13. The two ends of the circuit are connected, and then the timing circuit 54 closes the circuit of the coil 13 according to a certain time period and passes the current. After the current flows through the coil 13, under the action of the magnetic field generated by the magnet 14 and the pole piece 15, the aluminum frame 18 and coil 13 are rotated at a certain angle by the ampere force. The pointer 6 rotates at the same angle as the rotating shaft 7, and the angle of rotation is proportional to the magnitude of the current. At the same time, the pointer 6 can maintain one of the color indications when rotating. The circuit in the lamp 3 is connected and lights up, which can quickly transmit a signal whether there is an abnormality in the current, and the dial 2 can measure the specific value of the current. In addition, the movable adjustment member 8 can select three different resistances. 41 is connected in parallel at both ends of the coil 13, so that the range of current monitoring can be expanded, the range of use is wider, and the operation is simple and convenient.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as illustrative and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is therefore intended that all claims falling within the claims All changes within the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims shall not be construed as limiting the claim in question.

In addition, it should be understood that although this specification is described in terms of implementations, not each implementation only contains an independent technical solution. This description of the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole. , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (9)

1. A current abnormality monitoring device, including a housing (1), characterized in that a dial (2) and two plug holes (5) are provided on the front of the housing (1). A movable clamping piece is provided in the wire hole (5), and a pointer (6) is provided below the dial (2). The pointer (6) is rotatably installed on the housing (1), and the housing (1) 1) A driving part for driving the pointer (6) to rotate is provided on the inside. The driving part includes a magnet (14), a pole piece (15), a coil spring (17), an aluminum frame (18) and a rotating shaft (7). There are two pole shoes (15) and they are fixed on both sides of the magnet (14). The opposite sides of the two pole shoes (15) are arc surfaces. The aluminum frame (18) and the pole shoes (15) The arc surfaces are arranged concentrically, and the aluminum frame (18) is rotated and installed in the housing (1) through the rotating shaft (7). The aluminum frame (18) is wound with a number of turns of coils (13) along its length direction. ), the coil spring (17) is sleeved on the outside of the rotating shaft (7), and one end of the coil spring (17) is fixedly connected to the rotating shaft (7), and the other end is fixedly connected to the housing (1). The two ends of the coil (13) Electrically connected to the movable clamping piece, the housing (1) is provided with a ring (9) on the outside corresponding to the rotating shaft (7), and the ring (9) is provided with three sets of arc-shaped conductive sheets (10). One end of the pointer (6) is fixed on the rotating shaft (7), and the pointer (6) has a conductive piece (55) connected to a group of arc-shaped conductive sheets (10). The housing (1) Three indicator lights (3) of different colors are provided. The three indicator lights (3) are electrically connected to the three sets of arc-shaped conductive sheets (10) in one-to-one correspondence, and the indicator lights (3) are connected in parallel with the coil (13). . 2. A current abnormality monitoring device according to claim 1, characterized in that the three groups of arc-shaped conductive sheets (10) are a first conductive sheet (20), a second conductive sheet (23) and a third group of arc-shaped conductive sheets (10). Three conductive sheets (24), the first conductive sheet (20), the second conductive sheet (23) and the third conductive sheet (24) are arranged in order, and there are two of the three, and the second conductive sheet (24) is The sheet (23), the first conductive sheet (20) and the third conductive sheet (24) have insulating coatings that conflict with each other, and the three are provided with terminals (26) penetrating the ring (9). The first conductive sheet (24) is When the piece (20) is energized with the indicator light (3) of the first color, it is used to transmit a signal that the current in the coil (13) is less than the normal value range, and the second conductive piece (23) is connected with the indicator light of the second color. (3) When energized, it is used to transmit the signal that the current in the coil (13) is within the normal value range. When the third conductive sheet (24) and the indicator light (3) of the third color are energized, it is used to transmit the signal of the coil ( 13) The signal in which the current is greater than the normal value range. 3. A current abnormality monitoring device according to claim 2, characterized in that the pointer (6) includes a needle body part (11) and a conductive part (12), and the needle body part (11) One end is fixedly connected to the conductive part (12). The conductive part (55) includes a first limiting bolt (22), a first spring (25) and a sliding block (21). The first limiting bolt (22) After passing through the conductive part (12), it is fixedly connected to the sliding block (21). The first spring (25) is sleeved on the first limiting bolt (22), and its two ends are respectively connected with the conductive part (12) and the sliding block (21). The block (21) resists, and one end of the sliding block (21) that resists the arc-shaped conductive sheet (10) has a spherical structure. 4. A current abnormality monitoring device according to claim 3, characterized in that the rotating shaft (7) includes rotating rods (16) located on both sides of the aluminum frame (18), and the rotating rod (16) There is also a wire harness disk (40) between the wire harness disk (18) and the aluminum frame (18). The wire harness disk (40) and the aluminum frame (18) are fixed by bolts, and a supply coil (40) is provided in the middle of the wire harness disk (40). 13) Through the through slot (19), the rotating rod (16) is rotationally connected to the housing (1), and the rotating rod (16) and the cable harness plate (40) are fixedly connected through bolts. 5. A current abnormality monitoring device according to claim 1, characterized in that a timing circuit (54) is further provided in the housing (1), and the timing circuit (54) includes a 555 timing chip and A monostable circuit composed of a relay. The relay includes a relay coil and a relay normally open contact. The output end of the 555 timing chip is coupled to the relay coil. The normally open contact of the relay is coupled to the coil (13) power supply end. 6. A current abnormality monitoring device according to claim 1, characterized in that three resistors (41) with different resistances are connected in parallel at both ends of the coil (13). A movable adjusting member (8) for controlling the energization state of the resistor (41) and the coil (13) is provided. 7. A current abnormality monitoring device according to claim 6, characterized in that the movable adjustment member (8) includes a sliding seat (35), a limiting piece (36), a pressing rod (43), The second spring (27), the third spring (38) and the fixed wire seat (42) are provided with a cavity for installing the sliding seat (35) and the limiting piece (36) in the housing (1). The sliding seat (35) is fixedly connected to the housing (1), and the sliding seat (35) is provided with a chute (29) for the limiting piece (36) to slide. One side of the limiting piece (36) is provided with There is a limiting boss (28) for positioning the second spring (27), and the limiting piece (36) is provided with a first notch (31), a second notch (32), and a third notch distributed at equal intervals. The opening (33) and the fourth notch (34) are provided with four pressing rods (43) and third springs (38), and are respectively connected with the first notch (31) and the second notch (32). ), the third notch (33) and the fourth notch (34) are provided correspondingly. The pressing rod (43) has a T-shaped structure, and one end is located in the cavity, and the other end extends to the outside of the housing (1) and A button (4) is provided, and the third spring (38) is sleeved on the outside of the pressing rod (43), and its two ends are in conflict with the button (4) and the housing (1) respectively, and three of the pressing rods are (43) are provided with mounting pieces (39) for fixing the resistor (41), and the second notch (32), the third notch (33) and the fourth notch (34) are located on the three resistors ( 41), there are six fixed wire seats (42), and they are correspondingly arranged on both sides of the second notch (32), the third notch (33) and the fourth notch (34), so The two ends of the coil (13) are respectively connected to the fixed wire seats (42) on both sides of the same notch, and the second notch (32), the third notch (33) and the fourth notch (34) ) are provided with limiting bayonet (37) for blocking the upward movement of the pressing rod (43), and the first notch (31), the second notch (32), the third notch (33) and the fourth The notches (34) are each provided with guide slopes (30) that cooperate with the pressing rod (43). The projection lengths of the four guide slopes (30) in the sliding direction of the limiting piece (36) are set according to rules. . 8. A current abnormality monitoring device according to claim 7, characterized in that the mounting piece (39) includes a mounting piece (45) and a second limiting bolt (47), and the second limiting bolt The bolt (47) is provided with an anti-rotation portion (46) with a non-circular structure, and the second limiting bolt (47) passes through the mounting piece (45) and is threadedly connected to the pressing rod (43). The mounting piece (47) 45) is provided with a metal sheet (48), the resistor (41) is provided in the middle of the metal sheet (48), and connecting bolts are provided on both ends of the metal sheet (48) and the wire-fixing base (42) (44). 9. A current abnormality monitoring device according to claim 1, characterized in that the movable clamping member includes a cover plate (51), a movable block (50), a fourth spring (49) and a conductive voltage member. (53), the movable block (50) is slidably installed in the housing (1), and the movable block (50) is provided with a pressing protrusion (52) extending to the outside of the cover plate (51), and the fourth Both ends of the spring (49) conflict with the housing (1) and the movable block (50) respectively. The conductive voltage member (53) has a semicircular structure, and one end is fixedly connected to the movable block (50). The conductive voltage component (53) is electrically connected to both ends of the coil (13).