Electricity larceny prevention electric energy meter

Abstract

The utility model provides an electricity larceny prevention electric energy meter, which relates to the technical field of electric energy meters and comprises an electric energy meter body and a protective shell connected with the electric energy meter body through a locking mechanism. The working surface of the bottom end of the electric energy meter body is provided with a wire holder, the wire holder is provided with a plurality of wiring terminals, and the wiring terminals are used for fixing connecting wires; the bottom of the wire holder is provided with a threading hole at a position corresponding to the wiring terminal. The two sides of the electric energy meter body are provided with open grooves, one side of each open groove is provided with a circular groove, and the open grooves are clamped with the protective shell. Mounting plates are symmetrically arranged on the working surface of the bottom end of the protective shell, the locking mechanisms are arranged on the mounting plates, and the locking mechanisms are used for mutually locking the protective shell and the electric energy meter body; according to the utility model, through the arrangement of the alarm assembly, when an electricity stealer destroys a plastic lead seal and a lead seal bolt, the alarm gives an alarm immediately, and the electricity stealer is frightened and frightened away.

Description

Technical Field

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

[0002] As an important metering device in the power system, the electricity meter is the direct basis for electricity metering and billing between power companies and users. Its metering accuracy is directly related to the economic benefits of power companies and the electricity rights of users.

[0003] CN106370896A discloses an electricity meter, including a lower housing, an upper housing connected to the lower housing, a terminal block, and a relay and a current transformer installed inside the lower housing. However, in practical applications, because the terminal blocks are exposed externally, electricity thieves can cut the wires at the terminal blocks and tamper with the circuit to steal electricity. This electricity theft not only harms the interests of power companies but also threatens the safe and stable operation of the power system. To solve the above problems, CN222965301U discloses an anti-theft electricity meter. The electricity meter includes a housing and a cover plate disposed on the upper part of the housing. A terminal block is located below the housing, and the terminal block has a connecting cover that can prevent electricity theft. A snap-fit ​​structure is provided between the terminal block and the connecting cover. The snap-fit ​​structure includes a positioning strip disposed on one side of the terminal block or the connecting cover and a positioning groove disposed on the other side for inserting and wrapping the positioning strip. It completely encloses the terminal blocks inside the connecting cover and prevents them from being exposed externally, thus effectively preventing the illegal tampering of the wire arrangement at the terminal blocks and resulting in electricity theft.

[0004] However, during operation and maintenance, CN222965301U requires the cover plate, connecting cover, fastening structure and extension block to be connected in sequence, which is complicated and not conducive to the installation and maintenance by operators; if the cover plate is replaced with one that is easy to install, it will be easier for electricity thieves to disassemble it and thus steal electricity.

[0005] Therefore, there is an urgent need for a device that can be easily installed while effectively preventing electricity thieves from illegally stealing electricity to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide an anti-theft electricity meter that solves the technical problem in the prior art that it is not possible to effectively prevent illegal electricity theft while being easy to install.

[0007] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows:

[0008] An anti-theft electricity meter includes: a meter body and a protective shell connected to the meter body via a locking mechanism; the bottom working surface of the meter body has a terminal block with multiple terminals for fixing connecting wires; the bottom of the terminal block has through holes corresponding to the terminals, which are adapted to the working dimensions of the protective shell; slots are formed on both sides of the meter body, and a circular groove is formed on one side of the slots, which engage with the protective shell; a mounting plate is symmetrically provided on the bottom working surface of the protective shell, and the locking mechanism is provided on the mounting plate for locking the protective shell and the meter body together.

[0009] Furthermore, the terminal block is symmetrically provided with mounting chambers, each mounting chamber having a guide cylinder inside and an alarm component at its top.

[0010] Furthermore, the locking mechanism includes: a lead seal bolt, a lead seal seat located on one side of the working surface of the mounting plate, and a plastic lead seal connected to the lead seal seat and the lead seal bolt; the lead seal bolt passes through the mounting plate and the terminal block, and is threadedly connected to the guide cylinder; the lead seal seat is sleeved with the lead seal bolt, and has a through hole.

[0011] Furthermore, one end of the lead-sealed bolt is provided with a first magnet, which repels the magnetic properties of the alarm component; the other end of the lead-sealed bolt has a lead-sealed hole.

[0012] Furthermore, the alarm assembly includes: a housing, a micro switch disposed within the housing, and an alarm electrically connected to the micro switch; the housing is hinged to a cover plate and communicates with the guide cylinder, and contains a battery, which is electrically connected to the micro switch and the alarm; the micro switch has a contact portion and an elastic plate on one side, and a second magnet on one side of the elastic plate, the second magnet being positioned opposite the first magnet and having the same magnetic poles; through mutual repulsive magnetic force, the second magnet drives the elastic plate to contact the contact portion, and the micro switch is in a closed state; if the first magnet separates from the second magnet, the mutual repulsive magnetic force weakens, at which point the elastic plate separates from the contact portion, and the alarm sounds.

[0013] Furthermore, the outer casing is made of insulating material.

[0014] Furthermore, the protective shell is provided with ear plates on both sides, and the ear plates engage with the slot.

[0015] Furthermore, a fixing rod is provided on the opposite side of the ear plate, and the fixing rod is inserted into the circular groove.

[0016] Furthermore, the guide cylinder is hollow inside and has a preset internal thread, which is threadedly connected to the lead seal bolt.

[0017] Furthermore, the centerline of the lead seal hole coincides with that of the through hole, and they are sequentially connected to the plastic lead seal.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (i) By setting up the alarm component, when the electricity thief breaks the plastic lead seal and lead seal bolt, the protective shell is illegally opened. At this time, the first magnet and the second magnet separate, causing the elastic plate to separate from the contact part, the micro switch is disconnected, and the alarm immediately sounds, which deters and scares away the electricity thief and effectively prevents the occurrence of electricity theft.

[0020] (ii) With the setting of the locking mechanism, when using this utility model, the operator screws the lead seal bolt into the guide cylinder, and with the synergistic effect of the lead seal seat and the plastic lead seal, a tight connection between the protective shell and the electricity meter body is achieved; the operation process is simple and convenient for the operator to install or maintain. Attached Figure Description

[0021] Figure 1 This is a perspective view of an anti-theft electricity meter disclosed in this utility model;

[0022] Figure 2 This is an overall diagram of an anti-theft electricity meter disclosed in this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the wiring socket of an anti-theft electricity meter disclosed in this utility model;

[0024] Figure 4 This is a side view of the meter body of an anti-theft electricity meter disclosed in this utility model;

[0025] Figure 5 This is an enlarged schematic diagram of the alarm component (part A) of an anti-theft electricity meter disclosed in this utility model;

[0026] Figure 6 This is an enlarged schematic diagram of the locking mechanism (part B) of an anti-theft electricity meter disclosed in this utility model;

[0027] Figure 7 This is a perspective view of a protective casing for an anti-theft electricity meter disclosed in this utility model;

[0028] Figure 8 This is a perspective view of a lead-sealing bolt for an anti-theft electricity meter disclosed in this utility model;

[0029] Figure 9 This is a schematic diagram showing the usage status of the lead seal bolt and alarm component of an anti-theft electricity meter disclosed in this utility model;

[0030] Figure 10 This is a schematic diagram showing the lead seal bolt and alarm component of an anti-theft electricity meter in the open state.

[0031] In the diagram: 1. Meter body; 101. Slot; 102. Circular groove; 2. Protective shell; 201. Ear plate; 202. Fixing rod; 3. Terminal block; 4. Wiring terminal; 5. Wire hole; 6. Mounting plate; 7. Lead seal bolt; 701. First magnet; 702. Lead seal hole; 8. Lead seal seat; 9. Plastic lead seal; 10. Mounting chamber; 11. Guide cylinder; 1101. Internal thread; 12. Alarm assembly; 1201. Outer shell; 1202. Alarm; 1203. Cover plate; 1204. Micro switch; 1205. Battery; 1206. Elastic plate; 1207. Second magnet; 1208. Contact part. Detailed Implementation

[0032] To make the content of this utility model easier to understand, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0033] Figure 1 This is a perspective view of an anti-theft electricity meter disclosed in this utility model; Figure 2 This is an overall diagram of an anti-theft electricity meter disclosed in this utility model; as shown... Figure 1-2As shown, this embodiment provides an anti-theft electricity meter, including: an electricity meter body 1 and a protective shell 2 connected to the electricity meter body 1 via a locking mechanism; the bottom working surface of the electricity meter body 1 has a terminal block 3, and the terminal block 3 is provided with multiple terminals 4, which are used to fix the connecting wires. The terminals 4 are fixed by threaded fastening to ensure a firm and reliable connection and prevent loosening of the connecting wires due to vibration or external force; the bottom of the terminal block 3 has a wire-passing hole 5 corresponding to the terminal block 4, which ensures that external connecting wires can pass through smoothly; the terminal block 3... The protective shell 2 is made of high-strength insulating plastic and has a preset strength, which is compatible with the working size of the protective shell 2. The meter body 1 has slots 101 on both sides and a circular groove 102 on one side of the slots 101. The slots 101 engage with the protective shell 2 and provide a positioning reference for the installation of the protective shell 2. The bottom working surface of the protective shell 2 is symmetrically provided with a mounting plate 6, which is integrally formed with the protective shell 2. The mounting plate 6 is provided with the locking mechanism, which is used to lock the protective shell 2 and the meter body 1 together to prevent electricity thieves from performing illegal operations.

[0034] Figure 3 This is a schematic diagram of the internal structure of the wiring socket of an anti-theft electricity meter disclosed in this utility model; as shown. Figure 3 As shown, the terminal block 3 is symmetrically provided with mounting chambers 10. Inside the mounting chamber 10 is a guide cylinder 11. The guide cylinder 11 is hollow inside and has a preset internal thread 1101. The top of the guide cylinder 11 is provided with an alarm component 12. The alarm component 12 can emit an alarm to deter and scare away electricity thieves, effectively preventing the occurrence of electricity theft.

[0035] Figure 6 This is an enlarged schematic diagram of the locking mechanism (part B) of an anti-theft electricity meter disclosed in this utility model; as shown. Figure 6 As shown, the locking mechanism includes: a lead-sealed bolt 7, a lead-sealed seat 8 located on one side of the working surface of the mounting plate 6, and a plastic lead seal 9 connected to the lead-sealed seat 8 and the lead-sealed bolt 7; the lead-sealed bolt 7 passes through the mounting plate 6 and the terminal block 3, and is threadedly connected to the internal thread 1101 of the guide cylinder 11, so as to achieve a tight lock between the protective shell 2 and the meter body 1, which is not easy to loosen; the pitch, thread profile and precision of the lead-sealed bolt 7 and the internal thread 1101 are matched to ensure the firmness and reliability of the thread; the lead-sealed seat 8 is sleeved with the lead-sealed bolt 7, and a through hole is opened on it; Figure 8 This is a perspective view of a lead-sealing bolt for an anti-theft electricity meter disclosed in this utility model; as shown. Figure 8As shown, one end of the lead-sealing bolt 7 is provided with a first magnet 701. The first magnet 701 is made of neodymium iron boron magnet with a nickel-plated surface, which has excellent magnetic properties and corrosion resistance, and its magnetism can be maintained for more than ten years. The first magnet 701 and the alarm component 12 repel each other, forming a repulsive magnetic force. The other end of the lead-sealing bolt 7 has a lead-sealing hole 702, which coincides with the axis of the through hole and is connected to the plastic lead seal 9 in sequence, ensuring that the plastic lead seal 9 can pass through smoothly and be fixed on the lead-sealing bolt 7, thereby effectively preventing illegal disassembly and tampering by electricity thieves. In use, the operator screws the lead-sealing bolt 7 into the guide cylinder 11 and connects it with the internal thread 1101. Then, the operator connects the plastic lead seal 9 to the lead seal seat 8 and the lead-sealing bolt 7. The operation process is simple and convenient for operators to install or maintain.

[0036] Figure 5 This is an enlarged schematic diagram of the alarm component (part A) of an anti-theft electricity meter disclosed in this utility model; Figure 9 This is a schematic diagram showing the usage status of the lead seal bolt and alarm component of an anti-theft electricity meter disclosed in this utility model; Figure 10 This is a schematic diagram showing the lead seal bolt and alarm component of an anti-theft electricity meter in the open state; as shown. Figure 5 and Figure 9-10As shown, the alarm assembly 12 includes: a housing 1201, a micro switch 1204 disposed within the housing 1201, and an alarm 1202 electrically connected to the micro switch 1204; the housing 1201 is made of an insulating material, such as engineering plastic, and has preset heat resistance, corrosion resistance, and mechanical strength to ensure stable operation under various environmental conditions; the housing 1201 is hinged to the cover plate 1203 for easy installation and maintenance; the housing 1201 and the cover plate 1203 are connected to the cover plate 1202 for easy installation and maintenance. The cylinder 11 is connected to a storage battery 1205, which is a CR2032 lithium manganese battery with a rated capacity of 200-245mAh. The battery 1205 is electrically connected to a micro switch 1204 and an alarm 1202, requiring no external power supply. It should be noted that the power supply line is normally closed. The alarm 1202 is a miniature buzzer with a power of 30mA, a volume of 132dB, and an operating voltage of 1V. The prior art meets the above requirements. Any type of buzzer can be used, and will not be described in detail in this application; the micro switch 1204 is compatible with the operating parameters of the alarm 1202 and is existing technology, so it will not be described in detail here; the micro switch 1204 has a contact portion 1208 and an elastic plate 1206 on one side, and a second magnet 1207 is provided on one side of the elastic plate 1206. The second magnet 1207 corresponds to the first magnet 701 in position and has the same magnetic poles, forming a structure in which they repel each other magnetically; the second magnet 1207 is also made of neodymium iron boron magnet with nickel plating. Through mutual repulsion, the second magnet 1207 drives the elastic plate 1206 to contact the contact part 1208, and the micro switch 1204 is in the closed state. If the first magnet 701 separates from the second magnet 1207, the mutual repulsion weakens. At this time, the elastic plate 1206 separates from the contact part 1208, and the alarm 1202 sounds an alarm. The 132dB sound can penetrate the meter body 1, ensuring that the alarm signal can have a deterrent effect.

[0037] Figure 4 This is a side view of the meter body of an anti-theft electricity meter disclosed in this utility model; Figure 7 This is a perspective view of a protective casing for an anti-theft electricity meter disclosed in this utility model; as shown. Figure 4 and Figure 7 As shown, the protective shell 2 has ear plates 201 on both sides. The edges of the ear plates 201 are provided with precision engaging flanges, which are precisely matched with the depth and width of the slot 101 to form a double engaging positioning. The opposite sides of the ear plates 201 are provided with fixing rods 202, which are inserted into the circular groove 102. Specifically, the fixing rods 202 and the circular groove 102 are interference-fitted to form a locking structure.

[0038] Working principle: After the connecting wire passes through the wire hole 5 and connects to the terminal 4, the operator inserts the ear plates 201 of the protective shell 2 into the slots 101 on both sides. Then, the operator screws the lead seal bolt 7 into the guide cylinder 11. At this time, the first magnet 701 and the second magnet 1207 repel each other, thereby causing the elastic plate 1206 to contact the contact part 1208. At this time, the micro switch 1204 is in the closed state, and the alarm 1202 does not sound an alarm. Then, the operator passes the plastic lead seal 9 through the through hole and the lead seal hole 702 to complete the installation. When the electricity thief breaks the plastic lead seal 9 and removes the lead seal bolt 7, the first magnet 701 and the second magnet 1207 separate. The elastic plate 1206 disengages from the contact part 1208 under its own elastic force, the micro switch 1204 changes from the closed state to the open state, and the alarm 1202 sounds an alarm, deterring and scaring away the electricity thief, thereby effectively preventing the occurrence of electricity theft.

[0039] When the operator needs to maintain the meter body 1, the alarm 1202 is turned off through the external controller, and then the plastic lead seal 9 and lead seal bolt 7 are removed to carry out the maintenance work.

[0040] The above description is only a preferred embodiment of this utility model patent and is not intended to limit this utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model patent should be included within the protection scope of this utility model patent.

Claims

1. An anti-theft electricity meter, characterized in that: include: The meter body (1) and the protective shell (2) connected to the meter body (1) by a locking mechanism. The bottom working surface of the electricity meter body (1) has a terminal block (3), and the terminal block (3) is provided with multiple terminals (4). The terminals (4) are used to fix the connecting wires. The bottom of the terminal block (3) is provided with a wire hole (5) corresponding to the terminals (4), which is adapted to the working size of the protective shell (2). The meter body (1) has slots (101) on both sides, and a circular groove (102) is formed on one side of the slots (101). The slots (101) engage with the protective shell (2). The protective shell (2) has a mounting plate (6) symmetrically arranged on the working surface at the bottom end. The mounting plate (6) is provided with the locking mechanism, which is used to lock the protective shell (2) and the electricity meter body (1) together. The terminal block (3) is symmetrically provided with mounting chambers (10), and the mounting chamber (10) is provided with a guide cylinder (11) inside and an alarm component (12) at the top. The locking mechanism includes: a lead seal bolt (7), a lead seal seat (8) located on one side of the working surface of the mounting plate (6), and a plastic lead seal (9) connected to the lead seal seat (8) and the lead seal bolt (7). One end of the lead seal bolt (7) is provided with a first magnet (701), and the first magnet (701) and the alarm component (12) are mutually repelled by each other.

2. The anti-theft electricity meter according to claim 1, characterized in that: The lead seal bolt (7) passes through the mounting plate (6) and the terminal block (3) and is threadedly connected to the guide cylinder (11); the lead seal seat (8) is sleeved with the lead seal bolt (7) and has a through hole.

3. The anti-theft electricity meter according to claim 2, characterized in that: The other end of the lead-sealing bolt (7) has a lead-sealing hole (702).

4. The anti-theft electricity meter according to claim 1, characterized in that: The alarm assembly (12) includes: a housing (1201), a micro switch (1204) disposed in the housing (1201), and an alarm (1202) electrically connected to the micro switch (1204). The outer shell (1201) is hinged to the cover plate (1203) and communicates with the guide cylinder (11). A storage battery (1205) is provided inside the storage battery (1205), which is electrically connected to the micro switch (1204) and the alarm (1202). The micro switch (1204) has a contact part (1208) and an elastic plate (1206) on one side. The elastic plate (1206) has a second magnet (1207) on one side. The second magnet (1207) is positioned opposite to the first magnet (701) and has the same magnetic poles. Through mutual repulsion magnetic force, the second magnet (1207) drives the elastic plate (1206) to contact the contact part (1208), and the micro switch (1204) is in a closed state. If the first magnet (701) separates from the second magnet (1207), the mutual repulsion magnetic force weakens. At this time, the elastic plate (1206) separates from the contact part (1208), and the alarm (1202) sounds an alarm.

5. The anti-theft electricity meter according to claim 4, characterized in that: The outer casing (1201) is made of insulating material.

6. The anti-theft electricity meter according to claim 1, characterized in that: The protective shell (2) has ear plates (201) on both sides, and the ear plates (201) engage with the slot (101).

7. The anti-theft electricity meter according to claim 6, characterized in that: A fixing rod (202) is provided on the opposite side of the ear plate (201), and the fixing rod (202) is inserted into the circular groove (102).

8. The anti-theft electricity meter according to claim 1, characterized in that: The guide cylinder (11) is hollow inside and has a preset internal thread (1101), which is threadedly connected to the lead seal bolt (7).

9. The anti-theft electricity meter according to claim 3, characterized in that: The lead seal hole (702) coincides with the axis of the through hole and is connected to the plastic lead seal (9) in sequence.

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