An anti-theft electricity meter

Abstract

This utility model provides an anti-theft electricity meter, belonging to the field of electricity meter technology. It includes a protective box with a rotating door on one side. Inside the box are a latching device that acts on the door and the electricity meter body. A cover plate is rotatingly mounted on the lower part of the electricity meter body, and an infrared sensor is fixedly installed on the cover plate, facing the door. Two limiting blocks are slidably installed on the inner wall of the protective box. A motor is fixedly installed inside the protective box, and the motor engages with the two limiting blocks through a first transmission component and with the latching device through a second transmission component. A PLC controller is fixedly installed inside the protective box. The input terminal of the PLC controller is electrically connected to the infrared sensor, and the output terminal is electrically connected to both the motor and a wireless communication module. After the door is broken, the infrared sensor will no longer be blocked by the door, and the PLC controller will transmit a signal through the wireless communication module, thus achieving the anti-theft function.

Description

Technical Field

[0001] This utility model belongs to the field of electricity meter technology, and specifically relates to an electricity meter that prevents electricity theft. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy. It is also called an electricity meter, kilowatt-hour meter, or kilowatt-hour meter. It refers to an instrument that measures various electrical quantities. When using an electricity meter, it is important to note that under low voltage and low current conditions, the electricity meter can be directly connected to the circuit for measurement. However, under high voltage or high current conditions, the electricity meter cannot be directly connected to the line and must be used in conjunction with a voltage transformer or current transformer.

[0003] However, most existing electricity meters lack anti-theft features, making them vulnerable to electricity theft by criminals, thus harming both legitimate users and power suppliers. Furthermore, existing meters often only have a protective outer casing, allowing criminals to easily steal electricity after breaching it. This single-layer protection is relatively weak, failing to provide sufficient time to delay criminals and hindering their capture, resulting in limited practical effectiveness. Utility Model Content

[0004] To address the problems existing in the background technology, this utility model provides an electricity meter that prevents electricity theft.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An anti-theft electricity meter includes a protective box with a rotatable door on one side. Inside the protective box are a latching device that acts on the door and an electricity meter body. A cover plate is rotatably mounted on the lower part of the electricity meter body, and an infrared sensor is fixedly installed on the cover plate, facing the door. Two limiting blocks are slidably positioned on the inner wall of the protective box, facing each other and located between the cover plate and the door. A motor is fixedly installed inside the protective box, and the motor engages with the two limiting blocks via a first transmission component and with the latching device via a second transmission component. A PLC controller is fixedly installed inside the protective box, with its input terminal electrically connected to the infrared sensor and its output terminal electrically connected to both the motor and a wireless communication module.

[0007] Furthermore, the first transmission component includes a threaded rod, a sliding plate is slidably mounted inside the protective box, and connecting plates are fixedly mounted at both ends of the sliding plate. The output shaft of the motor is fixedly mounted with the threaded rod, and the bottom thread of the threaded rod passes through the sliding plate and is rotatably connected to the protective box. Each of the connecting plates is provided with a first sliding groove, and the first sliding groove is composed of a vertical groove and an inclined groove connected together. Two second sliding grooves are provided inside the protective box, and a sliding rod is slidably mounted in each second sliding groove. The sliding rod is fixedly connected to the limiting block one by one, and also slidably cooperates with the first sliding groove one by one.

[0008] Furthermore, the latching component includes a pin, which is slidably positioned on one side of the inner wall of the protective box, and a spring is provided between the pin and the protective box; an insertion hole is provided on the box door, and the insertion hole and the pin are correspondingly engaged.

[0009] Furthermore, the second transmission component includes a pull rope, which is fixedly mounted on the top of the slide plate. The other end of the pull rope passes through the protective box and is fixedly connected to the pin. A spring is sleeved on the outer surface of the pull rope.

[0010] Furthermore, a card reader slot is provided on the protective box, and a card reader is installed in the card reader slot. The card reader is electrically connected to the PLC controller.

[0011] Furthermore, an observation window is installed on the box door.

[0012] This application has the following beneficial effects:

[0013] 1. After criminals break into the cabinet, the infrared sensor will no longer be blocked by the door, thus transmitting the signal to the PLC controller. The PLC controller will then transmit the signal through the wireless communication module, thereby alerting the operator and achieving the purpose of theft prevention.

[0014] 2. After the criminals damage the door, the controller will also transmit a signal to the motor, controlling the motor's output shaft to rotate in the opposite direction, causing the two limit plates to slide out, thereby restricting the rotation of the cover plate and thus applying a second layer of protection to the electricity meter, which can play a delaying role and provide favorable conditions for apprehending the criminals. Attached Figure Description

[0015] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the electricity meter of this utility model;

[0018] Figure 3 This is a schematic diagram showing the connection between the motor and the slide bar in this utility model.

[0019] Figure 4 This is a schematic diagram of the second sliding groove structure of this utility model;

[0020] Figure 5 This is an overall cross-sectional view of the present invention;

[0021] Figure 6 This is a schematic diagram of the alarm system of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Protective box; 2. Box door; 3. Observation window; 4. Card reader slot; 5. PLC controller; 6. Motor; 7. Threaded rod; 8. Slide plate; 9. Connecting plate; 10. First slide groove; 11. Slide rod; 12. Second slide groove; 13. Limit block; 14. Energy meter body; 15. Cover plate; 16. Pull rope; 17. Pin; 18. Spring; 19. Infrared sensor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] like Figures 1-6 As shown, the technical solution adopted by this utility model is as follows: A theft-proof electricity meter includes a protective box 1. A door 2 is rotatably installed on one side of the protective box 1. The protective box 1 is equipped with both a latching component that acts on the door 2 and an electricity meter body 14. The latching component is used to lock and limit the door 2. An observation window 3 is installed on the door 2, which facilitates viewing the data on the electricity meter body 14. A cover plate 15 is rotatably installed on the lower part of the electricity meter body 14. Wiring grooves are opened on the lower parts of both the electricity meter body 14 and the protective box 1. An infrared sensor 19 is fixedly installed on the cover plate 15, facing the door 2, for measuring the distance to the door 2.

[0026] Both sides of the inner wall of the protective box 1 are equipped with sliding limit blocks 13. The two limit blocks 13 are arranged facing each other and are located between the cover plate 15 and the box door 2 to obstruct the cover plate 15. A motor 6 is fixedly installed inside the protective box 1. The motor 6 can be driven by the two limit blocks 13 through the first transmission component, and can also be driven by the snap-fit ​​component through the second transmission component.

[0027] The first transmission component includes a threaded rod 7, a sliding plate 8 is provided in the protective box 1 for limiting sliding, and connecting plates 9 are fixedly provided at both ends of the sliding plate 8. The output shaft of the motor 6 is fixedly provided with the threaded rod 7, and the bottom thread of the threaded rod 7 passes through the sliding plate 8 and is rotatably connected to the protective box 1. Each connecting plate 9 is provided with a first sliding groove 10, and the first sliding groove 10 is composed of a vertical groove and an inclined groove connected together. Two second sliding grooves 12 are provided in the protective box 1, and a sliding rod 11 is provided in each second sliding groove 12 for limiting sliding. The sliding rod 11 is fixedly connected to the limiting block 13 one by one, and also has a limiting sliding cooperation with the first sliding groove 10 one by one.

[0028] The locking component includes a pin 17, which is slidably fixed on one side of the inner wall of the protective box 1, and a spring 18 is provided between the pin 17 and the protective box 1; the box door 2 has a socket (not shown in the figure), which is locked in place with the pin 17.

[0029] The second transmission component includes a pull rope 16. The pull rope 16 is fixedly installed on the top of the slide plate 8. The other end of the pull rope 16 passes through the protective box 1 and is fixedly connected to the pin 17. The spring 18 is sleeved on the outer surface of the pull rope 16.

[0030] In addition, a PLC controller 5 is installed inside the protective box 1. The input terminal of the PLC controller 5 is electrically connected to the infrared sensor 19. The output terminal of the PLC controller 5 is electrically connected to both the motor 6 and a wireless communication module (not shown in the figure). At the same time, a card reader slot 4 is provided on the protective box 1. A card reader (not shown in the figure) is installed in the card reader slot 4 and is electrically connected to the PLC controller 5.

[0031] When the cabinet door 2 is opened by criminals, the infrared sensor 19 loses its obstruction and outputs an alarm signal to the PLC controller 5. Upon receiving the signal, the PLC controller 5 will, on the one hand, upload the signal to an external control terminal via a wireless communication module to alert the operator, and on the other hand, control the output shaft of the motor 6 to reverse, causing the slide plate 8 to move upward. This allows the slide rod 11 to slide within the inclined groove of the first slide groove 10. Through the sliding engagement of the slide rod 11 and the second slide groove 12, the two limit blocks 13 are pulled out to obstruct the cover plate 15. Since criminals need to open the cover plate 15 to connect wires when stealing electricity, the limit blocks 13 provide a layer of protection for the cover plate 15, thus delaying the criminals and providing favorable conditions for their capture.

[0032] It should be noted that the accompanying drawings in this application are all structural schematic diagrams, and the specific size can be adjusted according to actual use; at the same time, the PLC controller 5, infrared sensor 19, wireless communication module and card reader mentioned in the above-mentioned specification are all prior art, and this application will not describe them in detail.

[0033] Working principle: When wiring work is required, the power company staff inserts an IC card with specific permissions into the card reader 4. The inserted IC card is read by the card reader and the signal is transmitted to the PLC controller 5. The PLC controller 5 then transmits the signal to the infrared sensor 19 and the motor 6.

[0034] Upon receiving the signal, the infrared sensor 19 is de-energized and ceases operation, while the output shaft of motor 6 rotates forward. This rotation of the output shaft drives the threaded rod 7, causing the slide plate 8 to move downwards. The downward movement of slide plate 8 pulls the pull rope 16, causing the pin 17 to slide towards the compression spring 18, thereby releasing the restriction on the door 2. The door 2 can then be opened for inspection and maintenance of the electricity meter body 14. Additionally, the movement of slide plate 8 during this process also moves the two connecting plates 9. However, the sliding rod 11 slides within the vertical groove of the first sliding groove 10 and does not move laterally; therefore, the two limit blocks 13 do not extend.

[0035] When the door 2 is opened by criminals, the infrared sensor 19 will lose the cover of the door 2, and thus output an alarm signal to the PLC controller 5.

[0036] Upon receiving the signal, the PLC controller 5 transmits it wirelessly to an external control terminal to alert operators. Simultaneously, it reverses the output shaft of the motor 6, causing the sliding plate 8 to move the connecting plate 9 upwards. This allows the sliding rod 11 to slide within the inclined groove of the first sliding groove 10. Through the sliding engagement of the sliding rod 11 and the second sliding groove 12, the two limit blocks 13 are pulled out, obstructing the cover plate 15. Since criminals need to open the cover plate 15 to connect wires when stealing electricity, the limit blocks 13 provide a layer of protection, delaying the criminals and creating favorable conditions for their capture.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-theft electricity meter, characterized in that, The enclosure includes a protective box (1), with a door (2) rotatably mounted on one side. Inside the protective box (1) are a snap-fit ​​device acting on the door (2) and an electricity meter body (14). A cover plate (15) is rotatably mounted on the lower part of the electricity meter body (14), and an infrared sensor (19) is fixedly mounted on the cover plate (15), facing the door (2). Two limiting blocks (13) are slidably mounted on the inner wall of the protective box (1), with the two limiting blocks (13) facing each other. Located between the cover plate (15) and the door (2); a motor (6) is fixedly installed inside the protective box (1). The motor (6) is driven by two limit blocks (13) through the first transmission component and by the snap-fit ​​component through the second transmission component; a PLC controller (5) is fixedly installed inside the protective box (1). The input end of the PLC controller (5) is electrically connected to the infrared sensor (19), and the output end of the PLC controller (5) is electrically connected to the motor (6) and also electrically connected to a wireless communication module.

2. The anti-theft electricity meter according to claim 1, characterized in that, The first transmission component includes a threaded rod (7), a sliding plate (8) is provided in the protective box (1) for limiting sliding, and connecting plates (9) are fixedly provided at both ends of the sliding plate (8). The output shaft of the motor (6) is fixedly provided with the threaded rod (7). The bottom thread of the threaded rod (7) passes through the sliding plate (8) and is rotatably connected to the protective box (1). Each connecting plate (9) is provided with a first sliding groove (10), and the first sliding groove (10) is composed of a vertical groove and an inclined groove connected together. Two second sliding grooves (12) are provided in the protective box (1). Each second sliding groove (12) is provided with a sliding rod (11) for limiting sliding. The sliding rod (11) is fixedly connected to the limiting block (13) one by one, and is also in a limiting sliding cooperation with the first sliding groove (10) one by one.

3. The anti-theft electricity meter according to claim 2, characterized in that, The latching component includes a pin (17), which is slidably positioned on one side of the inner wall of the protective box (1), and a spring (18) is provided between the pin (17) and the protective box (1); the box door (2) has a socket, which is engaged with the pin (17).

4. The anti-theft electricity meter according to claim 3, characterized in that, The second transmission component includes a pull rope (16), the top of the slide plate (8) is fixedly provided with the pull rope (16), the other end of the pull rope (16) passes through the protective box (1) and is fixedly connected with the pin (17), and the spring (18) is sleeved on the outer surface of the pull rope (16).

5. An anti-theft electricity meter according to claim 1, characterized in that, The protective box (1) has a card reader slot (4) and a card reader is provided in the card reader slot (4). The card reader is electrically connected to the PLC controller (5).

6. An anti-theft electricity meter according to claim 1, characterized in that, An observation window (3) is installed on the box door (2).

Images