Watt-hour meter with electricity stealing prevention function

Abstract

The invention relates to the technical field of watt-hour meters, in particular to a watt-hour meter with an electricity stealing prevention function. Comprising a mounting plate, a watt-hour meter and contact pieces, the watt-hour meter is mounted on the mounting plate, the contact pieces are arranged on the watt-hour meter at intervals, a guide rail is arranged on the watt-hour meter, a translation mechanism is arranged on the guide rail, a sliding frame is slidably arranged on the guide rail, the translation mechanism is used for driving the sliding frame to move, and a through hole is formed in the sliding frame. The through holes are used for connecting lines into the sliding frame, and conducting pieces are arranged in the sliding frame at intervals and used for making contact with the contact pieces. The temperature detector and the patch type temperature sensor are arranged to monitor the temperature change of the line port, whether the behavior of illegally bypassing the watt-hour meter to steal electricity exists or not can be effectively detected, and when the abnormal change of the temperature is detected, the system can interrupt the current in time and inform the control center, so that the electricity stealing behavior is prevented, and the safety of the system is improved. Economic loss caused by an electric power company can be avoided, and safe operation of a power grid can be stabilized.

Description

Technical Field

[0001] This invention relates to the field of electricity meter technology, and in particular to an electricity meter with anti-theft function. Background Technology

[0002] With social development and technological progress, electricity has become an indispensable part of people's daily lives. As an important device for measuring users' electricity consumption, the electricity meter plays a key role in electricity billing. However, some criminals use various technical means to steal electricity in order to evade electricity bill payments. This not only causes economic losses to power companies, but also poses a threat to the safe operation of the power grid. Especially in the context of the rapid development of digitalization and intelligence, traditional electricity meters are facing more and more challenges.

[0003] Traditional mechanical or electronic electricity meters primarily calculate electricity consumption by recording the current flowing through the meter. However, these meters are ineffective against modern electricity theft techniques. For example, a common method of electricity theft involves directly connecting the live wire input to the meter to the live wire output from the meter, attempting to bypass the meter and steal electricity. This method is simple and direct, yet it effectively prevents the meter from recording the actual electricity consumption. Many existing electricity meters lack effective detection mechanisms for this physical connection method, making electricity theft difficult to detect and prevent in a timely manner. Summary of the Invention

[0004] To address the shortcomings of the prior art, the present invention provides an electricity meter with anti-theft function.

[0005] The technical solution of this invention is as follows: an electricity meter with anti-theft function, comprising a mounting plate, an electricity meter, and contact plates. The electricity meter is mounted on the mounting plate, and contact plates are spaced apart on the electricity meter. A guide rail is provided on the electricity meter, and a translation mechanism is provided on the guide rail. A sliding frame is slidably mounted on the guide rail. The translation mechanism is used to drive the sliding frame to move. A temperature detector is mounted on the side of the sliding frame to detect the ambient temperature. A through hole is opened on the sliding frame for line connection. Conductive plates are spaced apart inside the sliding frame for contacting the contact plates. A clamping plate is slidably mounted inside the sliding frame for pressing the line port onto the conductive plate. A patch temperature sensor is connected to the clamping plate for detecting the temperature of the line port. Screws are threadedly provided on the guide rail at intervals, and the screws are threadedly connected to the clamping plates. A controller and an integrated power transmission module are mounted on the side of the electricity meter. The integrated power transmission module is used for remote signal transmission and power supply.

[0006] Preferably, the translation mechanism includes a motor and a lead screw. The motor is mounted on the guide rail, and the lead screw is rotatably mounted inside the guide rail. The end of the lead screw is connected to the output shaft of the motor, and the sliding frame is threadedly connected to the lead screw.

[0007] Preferably, a protective housing is also included, with the protective housing mounted on the guide rail and the motor located inside the protective housing, which is used to protect the motor.

[0008] Preferably, an alarm is also included, with an alarm mounted on the side of the electricity meter for issuing an alarm.

[0009] Preferably, it also includes a fireproof mechanism, which includes a fixing plate, a U-shaped plate, a fireproof cloth, and a positioning plate. The fixing plate and the U-shaped plate are installed on the mounting plate, the electricity meter is located between the fixing plate and the U-shaped plate, the fireproof cloth is connected to the U-shaped plate, the fireproof cloth is used to cover the electricity meter for fire prevention, and the positioning plate is connected to the bottom end of the fireproof cloth.

[0010] Preferably, it also includes electromagnets, with electromagnets symmetrically arranged on the U-shaped plate, which are used to hold the positioning plate for limiting.

[0011] Preferably, it also includes a fire extinguishing mechanism, which includes a gas cylinder, a gas outlet pipe, a connecting plate, a lifting plate, and a stop plate. A gas cylinder is installed on the top of the electricity meter, and a gas outlet pipe is connected to the gas cylinder. A connecting plate is installed on the gas outlet pipe, and a lifting plate is slidably installed on the connecting plate. The lifting plate is used to block the port of the gas outlet pipe, and a stop plate is connected to the positioning plate. The stop plate is used to stop the lifting plate.

[0012] Preferably, the system also includes an inflation mechanism, which includes an injection pipe and a one-way valve. The gas tank is also connected to an injection pipe, which is used to fill the gas tank with gas. The one-way valve is provided on the injection pipe.

[0013] The beneficial effects of this invention are as follows: 1. This invention monitors the temperature changes at the line port by setting a temperature detector and a patch-type temperature sensor, which can effectively detect whether there is any illegal behavior of bypassing the electricity meter to steal electricity. When an abnormal temperature change is detected, the system can interrupt the current in time and notify the control center, thereby preventing electricity theft. This not only avoids economic losses to the power company, but also stabilizes the safe operation of the power grid.

[0014] 2. The present invention can issue a warning locally through the alarm device, reminding people in the vicinity to pay attention to potential safety risks, thereby preventing people in the vicinity from approaching the location and avoiding danger to people in the vicinity caused by unauthorized wiring.

[0015] 3. This invention includes multiple protective measures, including fireproof cloth and fire extinguishing mechanism, which can provide additional protection for electricity meters in the event of a fire, reducing property damage and safety hazards. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the translation mechanism of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the integrated sliding frame, controller, and power transmission module of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the guide rail, sliding frame, and through hole of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the conductive plate, screw, and lead screw of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the through hole, conductive sheet, and clamping sheet of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the clamping plate, the patch-type temperature sensor, and the screw of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the protective shell, alarm, and fireproof mechanism of the present invention.

[0024] Figure 9 This is a three-dimensional structural diagram of the gas cylinder, the backing plate, and the gas injection pipe of the present invention.

[0025] Figure 10 This is a three-dimensional structural diagram of the fire extinguishing mechanism and the inflation mechanism of the present invention.

[0026] Figure 11 This is a three-dimensional structural diagram of the lifting plate of the present invention that does not obstruct the air outlet port.

[0027] Reference numerals: 1. Mounting plate, 2. Electricity meter, 3. Contact plate, 4. Guide rail, 501. Motor, 502. Lead screw, 6. Sliding frame, 601. Temperature detector, 7. Through hole, 8. Conductive plate, 9. Clamping plate, 10. Surface mount temperature sensor, 11. Screw, 12. Controller, 13. Power supply and transmission integrated module, 14. Protective shell, 15. Alarm, 16. Fixing plate, 17. U-shaped plate, 18. Fireproof cloth, 19. Positioning plate, 20. Electromagnet, 21. Gas tank, 22. Gas outlet pipe, 23. Connecting plate, 24. Lifting plate, 25. Support plate, 26. Gas injection pipe, 27. One-way valve. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example: An electricity meter with anti-theft function, see below. Figures 1-7As shown, it includes a mounting plate 1, an electricity meter 2, and contact pieces 3; the electricity meter 2 is mounted on the front side of the mounting plate 1 and is used to measure the user's electricity consumption; four contact pieces 3 are spaced apart on the lower front side of the electricity meter 2. It also includes a guide rail 4, a translation mechanism, a sliding frame 6, a temperature detector 601, a conductive plate 8, a clamping plate 9, a surface-mount temperature sensor 10, a screw 11, a controller 12, and a power supply and transmission integrated module 13; the bottom of the electricity meter 2 is provided with a guide rail 4; a translation mechanism is provided on the guide rail 4, and a sliding frame 6 is slidably mounted on the front side of the guide rail 4. The translation mechanism is used to drive the sliding frame 6 to move on the guide rail 4; a temperature detector 601 is installed on the left side of the sliding frame 6, and the temperature detector 601 is used to detect the ambient temperature. The sliding frame 6 has four through holes 7 spaced apart at the bottom front side for wiring connection; four conductive plates 8 are spaced apart inside the sliding frame 6 at the front side for contacting the contact plate 3; the conductive plates 8 are made of conductive material; four clamping plates 9 are slidably arranged inside the sliding frame 6 at intervals for pressing the wiring port onto the conductive plates 8, thereby fixing the wiring; a surface-mount temperature sensor 10 is connected to the clamping plate 9 for detecting the temperature of the wiring port; Four screws 11 are threaded at intervals on the lower front side of rail 4. The four screws 11 are threadedly connected to four clamping plates 9 respectively. By twisting the screws 11 to rotate, the screws 11 can drive the clamping plates 9 to move, thereby clamping or loosening the line port. A controller 12 is installed on the upper left side of the electricity meter 2. The temperature detector 601 and the surface-mount temperature sensor 10 are electrically connected to the controller 12. A power supply and transmission integrated module 13 is installed on the upper right side of the electricity meter 2. The power supply and transmission integrated module 13 has a power supply and transmission unit. The power supply unit can store electricity, and the electricity stored in the power supply unit is used to supply electricity meter 2. The electricity used by the power supply and transmission integrated module 13 is not counted in the metering of electricity meter 2. The transmission unit can remotely transmit signals to the control center. The power supply and transmission integrated module 13 is electrically connected to the controller 12. The electricity used by the temperature detector 601, the surface-mount temperature sensor 10 and the controller 12 are all supplied by the power supply and transmission integrated module 13.

[0030] See Figures 2-5 As shown, the translation mechanism includes a motor 501 and a lead screw 502. The motor 501 is installed on both the left and right sides of the bottom of the guide rail 4. The motor 501 is electrically connected to the controller 12. The power used by the motor 501 is provided by the power supply and transmission integrated module 13. The lead screw 502 is rotatably installed on both the left and right sides inside the guide rail 4. The bottom end of the lead screw 502 is connected to the output shaft of the motor 501. The sliding frame 6 is threadedly connected to the lead screw 502.

[0031] In use, the operator first installs the mounting plate 1 in the designated position. Then, the live wire and neutral wire connected to the electricity meter 2 are connected through the through hole 7 (this line is the line connecting the electricity meter 2 to the power grid), so that the line port connected to the electricity meter 2 is between the conductive plate 8 and the surface-mount temperature sensor 10. Next, the screw 11 is turned to move the clamping plate 9 and the surface-mount temperature sensor 10 closer to the conductive plate 8, until the clamping plate 9 uses the surface-mount temperature sensor 10 to press the line port onto the conductive plate 8, thus fixing the live wire and neutral wire connected to the electricity meter 2. After that, the live wire and neutral wire from the electricity meter 2 are connected through the remaining two through holes 7 (this line is the line connecting the electricity meter 2 to the user's household appliances), so that the line port from the electricity meter 2 is connected through the through hole 7. The outlet is located between the conductive plate 8 and the surface-mount temperature sensor 10. Then, by turning the screw 11, the screw 11 drives the clamping plate 9 and the surface-mount temperature sensor 10 to move closer to the conductive plate 8 until the clamping plate 9 uses the surface-mount temperature sensor 10 to press the line port onto the conductive plate 8, thereby fixing the live wire and neutral wire from the electricity meter 2. Then, the controller 12 controls the motor 501 to drive the lead screw 502 to rotate, so that the lead screw 502 drives the sliding frame 6 to move closer to the electricity meter 2, thereby driving the conductive plate 8 to move closer to the contact plate 3 until the conductive plate 8 contacts the contact plate 3. In this way, the line can form a circuit with the electricity meter 2 through the conductive plate 8 and the contact plate 3, so that the electricity meter 2 can start measuring the user's electricity consumption. When a user is using electrical appliances normally and the power grid is supplying power normally, the control center sends a current transmission signal to the power supply and transmission integrated module 13. The power supply and transmission integrated module 13 then sends the signal to the controller 12. The controller 12 then controls the electricity meter 2 to detect whether current is flowing through it. If no current is flowing, it indicates that a thief is stealing electricity by completely bypassing the electricity meter 2. The controller 12 then initiates anti-theft operations (described below). If current is flowing, the controller 12 controls the temperature detector 601 and the surface-mount temperature sensor 10 to start working. The temperature detector 601 continuously monitors the ambient temperature and periodically sends the detected temperature to the controller 12, allowing the controller 12 to periodically calculate a preset value for the surface-mount temperature sensor 10 based on the ambient temperature (the preset temperature value). The temperature of the circuit is higher than the ambient temperature. The surface-mount temperature sensor 10 continuously monitors the temperature of the circuit. Due to the resistance loss (i.e., Joule heating effect) generated at the circuit port, the temperature at the circuit port is slightly higher than the ambient temperature. If the surface-mount temperature sensor 10 senses that the temperature of the circuit is greater than the preset value, it means that the current of the electricity meter 2 is normal. If the surface-mount temperature sensor 10 detects that the temperature of the circuit port is less than the preset value, it means that the current of the electricity meter 2 is shunted (in this case, since the current through the electricity meter 2 decreases, the resistance loss will also decrease, resulting in a decrease in the temperature at the circuit port). It is possible that an electricity thief directly connects the live wire input to the electricity meter 2 with the live wire output from the electricity meter 2. At this time, the surface-mount temperature sensor 10 will send a signal, and the controller 12 will start the anti-theft operation after receiving the signal. If the user does not use electrical appliances and the power grid stops supplying power, the control center will send a signal to the power transmission module 13 to stop the current transmission. Then, the power transmission module 13 will send the signal to the controller 12, and the controller 12 will control the temperature detector 601 and the surface mount temperature sensor 10 to stop working. When controller 12 initiates anti-theft operation, it sends an anti-theft signal to the integrated power supply and transmission module 13. The integrated power supply and transmission module 13 then remotely transmits the signal to the control center. Upon receiving the signal, the control center is aware that electricity meter 2 is being used for theft. The control center then disconnects the current from the power grid supplied to electricity meter 2 to prevent further theft. Simultaneously, it dispatches personnel to the site for immediate action. After the personnel arrive and repair the line, the control center then reconnects the current from the power grid to electricity meter 2. When the staff needs to repair or replace the electricity meter 2, the controller 12 controls the motor 501 to drive the lead screw 502 to reverse and reset. This causes the lead screw 502 to move the sliding frame 6 away from the electricity meter 2, thereby moving the conductive plate 8 away from the contact plate 3. This separates the conductive plate 8 from the contact plate 3, thus breaking the circuit between all lines and the electricity meter 2 at once. Then, the following operations are performed according to the situation: If the electricity meter 2 needs repair, the electricity meter 2 is repaired directly; if the electricity meter 2 needs replacement, the electricity meter 2 is disconnected from other parts connected to it. Disconnect the components, remove and replace the electricity meter 2, then reinstall the new electricity meter 2, and then reconnect the other components connected to the electricity meter 2. After the above operations are completed, the controller 12 controls the motor 501 to drive the lead screw 502 to rotate, so that the lead screw 502 drives the sliding frame 6 to move closer to the electricity meter 2, thereby driving the conductive plate 8 to move closer to the contact plate 3, so that the conductive plate 8 and the contact plate 3 re-contact each other, thus making all the circuits reconnect to the electricity meter 2 at once. In this way, it is convenient for staff to inspect or replace the electricity meter 2.

[0032] See Figure 8 As shown, it also includes a protective shell 14; the bottom of the guide rail 4 is equipped with a protective shell 14, and both motors 501 are located inside the protective shell 14. The protective shell 14 is used to protect the motors 501.

[0033] By providing a protective housing 14, the motor 501 can be protected from damage.

[0034] See Figure 8 As shown, it also includes an alarm 15; the alarm 15 is installed on the lower right side of the electricity meter 2. The alarm 15 is electrically connected to the controller 12. The power used by the alarm 15 is provided by the power supply and transmission integrated module 13. The alarm 15 is used to issue an alarm.

[0035] By setting up alarm 15, when controller 12 starts anti-electricity theft operation, controller 12 will control alarm 15 to sound an alarm, thereby using alarm 15 to alert nearby people that there is electricity theft at the location, preventing nearby people from approaching the location and avoiding danger to nearby people caused by unauthorized wiring; after staff arrive at the scene and repair the line, controller 12 will control alarm 15 to stop sounding.

[0036] See Figure 8 and Figure 9As shown, it also includes a fireproof mechanism, which includes a fixing plate 16, a U-shaped plate 17, a fireproof cloth 18, and a positioning plate 19; the fixing plate 16 is installed on the lower front side of the mounting plate 1; the U-shaped plate 17 is installed on the upper front side of the mounting plate 1, the electricity meter 2 is located between the fixing plate 16 and the U-shaped plate 17, the upper side of the U-shaped plate 17 is connected to the fireproof cloth 18, the fireproof cloth 18 is used to cover the electricity meter 2 for fire prevention; the bottom end of the fireproof cloth 18 is connected to the positioning plate 19, the positioning plate 19 is made of a magnetically attractive material.

[0037] See Figure 8 and Figure 9 As shown, it also includes an electromagnet 20; electromagnets 20 are symmetrically arranged on the left and right sides of the bottom of the U-shaped plate 17. The electromagnets 20 are used to hold the positioning plate 19 for limiting. The electromagnets 20 are electrically connected to the controller 12. The power used by the electromagnets 20 is provided by the power supply and transmission integrated module 13.

[0038] In the initial state, the electromagnet 20 is energized, so that the electromagnet 20 uses magnetic force to hold the positioning plate 19. By setting up a fireproof mechanism and an electromagnet 20, when the controller 12 starts the anti-theft operation, the controller 12 will control the electromagnet 20 to be de-energized, causing the electromagnet 20 to release the positioning plate 19. At this time, the positioning plate 19 will naturally fall down to contact the fixing plate 16, causing the positioning plate 19 to drive the fireproof cloth 18 to unfold and cover the electricity meter 2. In this way, when the illegally connected line catches fire due to safety hazards, the fireproof cloth 18 can protect the electricity meter 2. Afterwards, when the staff arrives at the scene and repairs the line, the positioning plate 19 is lifted and moved upward to reset, so that the positioning plate 19 contacts the electromagnet 20 and causes the positioning plate 19 to drive the fireproof cloth 18 to retract. Then, the controller 12 controls the electromagnet 20 to be energized, so that the electromagnet 20 uses magnetic force to hold the positioning plate 19.

[0039] See Figures 9-11 As shown, it also includes a fire extinguishing mechanism, which includes a gas cylinder 21, a gas outlet pipe 22, a connecting plate 23, a lifting plate 24, and a stop plate 25; the gas cylinder 21 is installed on the top of the electricity meter 2; the gas cylinder 21 is connected to the left side of the gas outlet pipe 22; the connecting plate 23 is installed on the gas outlet pipe 22; the lifting plate 24 is slidably arranged on the connecting plate 23, and the lifting plate 24 blocks the port of the gas outlet pipe 22; the stop plate 25 is connected to the left side of the positioning plate 19, and the stop plate 25 abuts against the bottom of the lifting plate 24.

[0040] See Figure 9 and Figure 10As shown, it also includes an inflation mechanism, which includes an inflation pipe 26 and a one-way valve 27; the right side of the gas tank 21 is connected to the inflation pipe 26, which is used to fill the gas tank 21 with gas; the inflation pipe 26 is provided with a one-way valve 27, which allows gas to enter the gas tank 21 only through the inflation pipe 26 and prevents the gas in the gas tank 21 from being discharged through the inflation pipe 26.

[0041] By setting up a fire extinguishing mechanism and a gas filling mechanism, when the circuit is connected to the electricity meter 2 through the conductive piece 8 and the contact piece 3, and the electricity meter 2 starts measuring the user's electricity consumption, carbon dioxide can be compressed and injected into the gas tank 21 through the gas filling pipe 26, so that the gas tank 21 contains an appropriate amount of compressed gas; then, when the positioning plate 19 falls down, the positioning plate 19 will drive the abutment plate 25 to move down, so that the abutment plate 25 separates from the bottom of the lifting plate 24, and the abutment plate 25 releases the bottom of the lifting plate 24. After the abutment plate 25 releases the bottom of the lifting plate 24, the compressed gas in the gas tank 21 will squeeze the lifting plate 24 to move down and open (e.g. Figure 11 (As shown), the compressed gas in the gas tank 21 will then be discharged, filling the environment covered by the fireproof cloth 18 with compressed gas; when a fire occurs in the environment covered by the fireproof cloth 18, carbon dioxide can be used to suppress the spread of the fire and extinguish the fire in the environment covered by the fireproof cloth 18; afterward, when the positioning plate 19 moves upward to reset, the positioning plate 19 will drive the abutment plate 25 to move upward to reset, so that the abutment plate 25 re-contacts the bottom of the lifting plate 24, thereby causing the abutment plate 25 to drive the lifting plate 24 to move upward to reset, so that the lifting plate 24 once again blocks the port of the gas pipe 22, and the abutment plate 25 once again abuts the bottom of the lifting plate 24.

[0042] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An electricity meter with anti-theft function, comprising a mounting plate (1), an electricity meter (2), and contact pieces (3), wherein the electricity meter (2) is mounted on the mounting plate (1), and contact pieces (3) are spaced apart on the electricity meter (2), characterized in that, The electricity meter (2) is equipped with a guide rail (4), a translation mechanism is provided on the guide rail (4), and a sliding frame (6) is slidably mounted on the guide rail (4). The translation mechanism is used to drive the sliding frame (6) to move. A temperature detector (601) is installed on the side of the sliding frame (6) to detect the ambient temperature. A through hole (7) is opened on the sliding frame (6) for line connection. Conductive plates (8) are spaced apart inside the sliding frame (6) for contacting the contact plate (3). A pressure plate (9) is provided at intervals and slides. The pressure plate (9) is used to press the port of the line onto the conductive plate (8). A surface-mount temperature sensor (10) is connected to the pressure plate (9). The surface-mount temperature sensor (10) is used to detect the temperature of the line port. A screw (11) is provided at intervals on the guide rail (4). The screw (11) is threadedly connected to the pressure plate (9). A controller (12) and a power transmission integrated module (13) are installed on the side of the electricity meter (2). The power transmission integrated module (13) is used for remote signal transmission and power supply.

2. An electricity meter with anti-theft function as described in claim 1, characterized in that, The translation mechanism includes a motor (501) and a lead screw (502). The motor (501) is mounted on the guide rail (4), and the lead screw (502) is rotatably installed inside the guide rail (4). The end of the lead screw (502) is connected to the output shaft of the motor (501), and the sliding frame (6) is threadedly connected to the lead screw (502).

3. An electricity meter with anti-theft function as described in claim 2, characterized in that, It also includes a protective shell (14), which is installed on the guide rail (4). The motor (501) is located inside the protective shell (14), and the protective shell (14) is used to protect the motor (501).

4. An electricity meter with anti-theft function as described in claim 3, characterized in that, It also includes an alarm (15), which is installed on the side of the electricity meter (2) and is used to issue an alarm.

5. An electricity meter with anti-theft function as claimed in claim 4, characterized in that, It also includes a fireproof mechanism, which includes a fixed plate (16), a U-shaped plate (17), a fireproof cloth (18) and a positioning plate (19). The fixed plate (16) and the U-shaped plate (17) are installed on the mounting plate (1). The electricity meter (2) is located between the fixed plate (16) and the U-shaped plate (17). The fireproof cloth (18) is connected to the U-shaped plate (17). The fireproof cloth (18) is used to cover the electricity meter (2) for fire prevention. The bottom end of the fireproof cloth (18) is connected to the positioning plate (19).

6. An electricity meter with anti-theft function as described in claim 5, characterized in that, It also includes an electromagnet (20), and electromagnets (20) are symmetrically arranged on the U-shaped plate (17). The electromagnets (20) are used to hold the positioning plate (19) for limiting.

7. An electricity meter with anti-theft function as claimed in claim 6, characterized in that, It also includes a fire extinguishing mechanism, which includes a gas cylinder (21), an air outlet pipe (22), a connecting plate (23), a lifting plate (24), and a stop plate (25). The gas cylinder (21) is installed on the top of the electricity meter (2). The gas cylinder (21) is connected to the air outlet pipe (22). The air outlet pipe (22) is connected to the connecting plate (23). The lifting plate (24) is slidably installed on the connecting plate (23). The lifting plate (24) is used to block the port of the air outlet pipe (22). The stop plate (25) is connected to the positioning plate (19). The stop plate (25) is used to stop the lifting plate (24).

8. An electricity meter with anti-theft function as claimed in claim 7, characterized in that, It also includes an inflation mechanism, which includes an inflation pipe (26) and a one-way valve (27). The gas tank (21) is also connected to the inflation pipe (26), which is used to fill the gas tank (21) with gas. The inflation pipe (26) is equipped with a one-way valve (27).

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