Anti-theft screw structure of electric energy meter

Abstract

The utility model provides a kind of electric energy meter antitheft screw structure, belong to electric energy meter equipment technical field.It is used to install the upper cover and base of electric energy meter;The screw structure includes the rotation part, cutting part, lead seal part and fixed part connected in turn;The rotation part is used to pass through the upper cover and rotate into the base for the fixed part, to make the upper cover and the base be fixedly connected;The cutting part is located between the rotation part and the lead seal part, the cutting part can be cut under external force, to make the rotation part and the lead seal part cut off and separate;The lead seal part is located in the upper cover, and the lead seal part can be installed lead seal.By screw structure, after the installation of upper cover and base is completed, it can effectively avoid to disassemble upper cover and base, prevent illegal operation to electric energy meter, eliminate unsafe operation behavior to electric energy meter, effectively guarantee the metering safety of electric energy meter and the integrity of equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of electricity meter equipment, and specifically relates to an anti-theft screw structure for electricity meters. Background Technology

[0002] Existing electricity meters generally use lead-sealed screws to fix the top cover and base. After the screws are installed, the lead seal is installed through the holes of the screws and the holes of the top cover. However, if the lead seal is damaged, the lead seal screws can be removed through the screw grooves using screwdrivers or other tools, thereby opening the top cover and base of the electricity meter. This can lead to illegal operation of the meter or unsafe operation, and cannot effectively guarantee the metering safety and equipment integrity of the electricity meter. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides an anti-theft screw structure for electricity meters. The technical problem to be solved by this utility model is: how to prevent the electricity meter's top cover and base from being disassembled after installation, thereby preventing illegal operation of the electricity meter and ensuring its security.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anti-theft screw structure for electricity meters, used to install the top cover and base of the electricity meter;

[0006] The screw structure includes a rotating part, a cutting part, a lead-sealing part, and a fixing part connected in sequence; the rotating part is used to pass the fixing part through the upper cover and screw it into the base so that the upper cover and the base are fixedly connected; the cutting part is located between the rotating part and the lead-sealing part, and the cutting part can be cut off under the action of external force so that the rotating part and the lead-sealing part are cut off and separated; the lead-sealing part is located inside the upper cover, and the lead-sealing part can be fitted with a lead seal.

[0007] In the above-mentioned anti-theft screw structure for an electricity meter, the upper cover is provided with an interconnected mounting hole and a through hole, the base is provided with a fixing hole, the through hole and the fixing hole are arranged opposite to each other, the fixing part passes through the mounting hole and the through hole in sequence and extends to the fixing hole, and the fixing part is threadedly connected to the fixing hole; a step is formed at the connection between the mounting hole and the through hole, and the end of the lead seal near the fixing part abuts against the step.

[0008] In the above-mentioned anti-theft screw structure for an electricity meter, the diameter of the mounting hole is larger than the diameter of the through hole, the lead seal part is clearance-fitted with the mounting hole, and the gap between the outer side of the lead seal part and the mounting hole is 0-0.15mm.

[0009] In the above-mentioned anti-theft screw structure for an electricity meter, the end of the cut-off part near the lead seal part is located inside the mounting hole, the rotating part is located outside the mounting hole, and the distance between the end of the cut-off part near the lead seal part and the opening of the mounting hole is 0-0.15mm.

[0010] In the above-mentioned anti-theft screw structure for an electricity meter, a screw groove is provided at the end of the rotating part away from the cutting part, and the screw groove is in the shape of a "I" or a "+".

[0011] In the above-mentioned anti-theft screw structure for an electricity meter, the cut-off part is inverted conical in shape, and the diameter of the cut-off part near the rotating part is larger than the diameter of the cut-off part near the lead seal part; the diameter of the cut-off part near the lead seal part is d, 1.8mm≤d≤2.2mm.

[0012] In the above-mentioned anti-theft screw structure for an electricity meter, the angle between the hypotenuse of the cut-off portion and the bottom line of the cut-off portion is α, where 75°≤α≤80°.

[0013] In the above-mentioned anti-theft screw structure for an electricity meter, a lead-sealed hole is provided on the lead-sealed part, and a through hole is provided on the upper cover, with the lead-sealed hole and the through hole corresponding to each other.

[0014] In the above-mentioned anti-theft screw structure for an electricity meter, the screw structure also includes a cylindrical pin. When it is necessary to cut off the cutting part by external force, the cylindrical pin is inserted into the lead seal hole and the through hole.

[0015] In the above-mentioned anti-theft screw structure for an electricity meter, the cylindrical pin is made of tungsten steel, and the diameter of the cylindrical pin is 0.2-0.3 mm smaller than the diameter of the lead-sealed hole.

[0016] The beneficial effects of this utility model are:

[0017] The screw structure of this utility model effectively prevents the disassembly of the top cover and base after installation, thus preventing illegal operation of the electricity meter, eliminating unsafe operating behaviors of the electricity meter, and effectively ensuring the metering safety and integrity of the equipment. Attached Figure Description

[0018] Figure 1 A cross-sectional view of the top cover and base of the electricity meter when they are installed using a screw structure.

[0019] Figure 2 A cross-sectional view of the rotating part of an electricity meter after the top cover and base are installed using a screw structure and then break.

[0020] Figure 3Another cross-sectional view of the top cover and base of the electricity meter when they are installed using a screw structure;

[0021] Figure 4 This is a schematic diagram of a screw structure.

[0022] In the diagram, 1 is the top cover; 11 is the mounting hole; 12 is the through hole; 13 is the through hole; 2 is the base; 21 is the fixing hole; 22 is the step; 3 is the rotating part; 31 is the screw groove; 4 is the cutting part; 5 is the lead seal part; 51 is the lead seal hole; 6 is the fixing part; and 7 is the cylindrical pin. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] like Figure 1-3 As shown, this embodiment provides an anti-theft screw structure for an electricity meter, used to install the upper cover 1 and base 2 of the electricity meter; the screw structure includes a rotating part 3, a cutting part 4, a lead seal part 5, and a fixing part 6 connected in sequence; the rotating part 3 is used to pass the fixing part 6 through the upper cover 1 and screw it into the base 2, so that the upper cover 1 and the base 2 are fixedly connected; the cutting part 4 is located between the rotating part 3 and the lead seal part 5, and the cutting part 4 can be cut under the action of external force, so that the rotating part 3 and the lead seal part 5 are cut off and separated; the lead seal part 5 is located inside the upper cover 1, and the lead seal part 5 can be fitted with a lead seal.

[0026] In this embodiment, the screw structure is used to fix the upper cover 1 and the base 2 of the electricity meter together. Specifically, the screw structure includes a rotating part 3, a cutting part 4, a lead-sealing part 5, and a fixing part 6 connected in sequence. When it is necessary to install the upper cover 1 and the base 2 of the electricity meter, an installation tool such as a screwdriver is used to rotate the rotating part 3 so that the lead-sealing part 5 is located inside the upper cover 1, and the fixing part 6 is screwed into the base 2. When the fixing part 6 is fully screwed into the base 2, a fixed connection is achieved between the upper cover 1 and the base 2. To prevent the upper cover 1 and the base 2 of the electricity meter from being disassembled, the fixing screw... After the structure is completed, additional force is applied to the rotating part 3 using an installation tool. The cutting part 4 is cut off under the applied external force, that is, the rotating part 3 and the lead seal part 5 are separated. After the cutting part 4 is broken, the fixing part 6 can no longer be unscrewed from the base 2 using an installation tool. Furthermore, a lead seal can be installed on the lead seal part 5. In this way, after the upper cover 1 and the base 2 of the electricity meter are installed, it is possible to effectively prevent the upper cover 1 and the base 2 from being disassembled, prevent illegal operation of the electricity meter, eliminate unsafe operation of the electricity meter, and effectively ensure the metering safety and equipment integrity of the electricity meter.

[0027] like Figure 1 and 2 As shown, the upper cover 1 is provided with an interconnected mounting hole 11 and a through hole 12, and the base 2 is provided with a fixing hole 21. The through hole 12 and the fixing hole 21 are arranged opposite to each other. The fixing part 6 passes through the mounting hole 11 and the through hole 12 in sequence and extends to the fixing hole 21. The fixing part 6 is threadedly connected to the fixing hole 21. A step 22 is formed at the connection between the mounting hole 11 and the through hole 12. The end of the lead seal part 5 near the fixing part 6 abuts against the step 22.

[0028] In this embodiment, the upper cover 1 is provided with an interconnected mounting hole 11 and a through hole 12. A step 22 is formed at the connection between the mounting hole 11 and the through hole 12. When it is necessary to install the upper cover 1 and the base 2, the fixing part 6 is passed through the mounting hole 11, the through hole 12 and the fixing hole 21 in sequence, and the fixing part 6 is fixed in the fixing hole 21. At this time, the end of the lead seal part 5 near the fixing part 6 abuts against the step 22, ensuring that the lead seal part 5 is stuck in the mounting hole 11 of the upper cover 1. In this way, the screw structure is used to fix the upper cover 1 and the base 2. As one embodiment, the fixing hole 21 is a threaded hole, and the fixing part 6 has an external thread that matches the fixing hole 21 so that the fixing part 6 can be smoothly screwed into the fixing hole 21.

[0029] like Figure 1 and 2 As shown, the diameter of the mounting hole 11 is larger than the diameter of the through hole 12. The lead seal part 5 is clearance-fitted with the mounting hole 11, and the gap between the outer side of the lead seal part 5 and the mounting hole 11 is 0-0.15mm.

[0030] In this embodiment, the diameter of the mounting hole 11 is larger than the diameter of the through hole 12, so that a step 22 is formed between the mounting hole 11 and the through hole 12, and thus when the upper cover 1 and the base 2 are assembled, the lead sealing portion 5 can be clamped in the mounting hole 11; the lead sealing portion 5 is in clearance fit with the mounting hole 11, ensuring that the lead sealing portion 5 can rotate in the mounting hole 11 when the rotating portion 3 is rotated; preferably, the gap between the outer side surface of the lead sealing portion 5 and the mounting hole 11 is greater than 0 mm and less than or equal to 0.15 mm.

[0031] As Figure 1 and 2 shown, the end of the cutting portion 4 adjacent to the lead sealing portion 5 is located in the mounting hole 11, the rotating portion 3 is located outside the mounting hole 11, and the distance between the end of the cutting portion 4 adjacent to the lead sealing portion 5 and the opening of the mounting hole 11 is 0-0.15 mm.

[0032] In this embodiment, the end of the cutting portion 4 adjacent to the lead sealing portion 5 is located in the mounting hole 11, and the rotating portion 3 is located outside the mounting hole 11. After the installation of the upper cover 1 and the base 2 is completed, an external force is applied to cut and separate the rotating portion 3 and the lead sealing portion 5. The cut cutting portion 4 is located in the mounting hole 11, and the distance between the end of the cut cutting portion 4 and the opening of the mounting hole 11 is greater than 0 mm and less than or equal to 0.15 mm, which prevents the cutting portion 4 from being exposed out of the mounting hole 11. On one hand, it avoids the exposure of the cutting portion 4 affecting the appearance of the electric energy meter, and on the other hand, it prevents the upper cover 1 and the base 2 from being disassembled through the cutting portion 4, and prevents illegal operations on the electric energy meter.

[0033] As Figure 4 shown, an end of the rotating portion 3 away from the cutting portion 4 is provided with a screw slot 31, and the screw slot 31 is in a straight shape or a cross shape.

[0034] In this embodiment, the screw slot 31 is in a straight shape or a cross shape, so a straight-head or cross-head screwdriver can be used to screw the screw structure in to fix the upper cover 1 and the base 2; of course, the screw slot 31 can also be in other shapes to adapt to different installation tools.

[0035] As Figure 1-3 shown, the cutting portion 4 has an inverted conical shape, and the diameter of the end of the cutting portion 4 adjacent to the rotating portion 3 is larger than the diameter of the end of the cutting portion 4 adjacent to the lead sealing portion 5; the diameter of the cutting portion 4 adjacent to the lead sealing portion 5 is d, 1.8 mm ≤ d ≤ 2.2 mm; the included angle between the hypotenuse of the cutting portion 4 and the bottom line of the cutting portion 4 is α, 75° ≤ α ≤ 80°.

[0036] In this embodiment, the cutting part 4 is inverted conical in shape. The diameter of the cutting part 4 near the rotating part 3 is larger than the diameter of the cutting part 4 near the lead seal part 5. When the cutting part 4 needs to be cut by external force, since the diameter of the upper end of the cutting part 4 is larger than the diameter of the lower end of the cutting part 4, it is only necessary to twist the cutting part 4 by one turn with external force. The cutting part 4 will deform and break, thus achieving the separation of the rotating part 3 and the lead seal part 5. Preferably, the diameter of the cutting part 4 near the lead seal part 5 is 1.8mm ≤ d ≤ 2.2mm; the angle between the hypotenuse of the cutting part 4 and the bottom line of the cutting part 4 is α, 75° ≤ α ≤ 80°. By limiting d and α, the cutting part 4 can break after being twisted by one turn.

[0037] like Figure 3 As shown, the lead-sealed part 5 is provided with a lead-sealed hole 51, and the upper cover 1 is provided with a through hole 13, with the lead-sealed hole 51 and the through hole 13 corresponding to each other. The screw structure also includes a cylindrical pin 7, which is inserted into the lead-sealed hole 51 and the through hole 13 when the cutting part 4 needs to be cut by external force.

[0038] In this embodiment, a lead-sealing hole 51 is provided on the lead-sealing part 5, and a through hole 13 is provided on the upper cover 1. The lead-sealing hole 51 and the through hole 13 correspond to each other. After the fixing part 6 of the screw structure is screwed into the fixing hole 21 of the base 2, the cylindrical pin 7 is inserted into the lead-sealing hole 51 and the through hole 13. At this time, the rotating part 3 continues to rotate by external force, while the lead-sealing part 5 is fixed in place under the action of the cylindrical pin 7. The cutting part 4 deforms and breaks under the action of external force, realizing the cutting and separation of the rotating part 3 and the lead-sealing part 5. After the cutting part 4 breaks, the cylindrical pin 7 is pulled out. At this time, a lead seal can be installed in the lead-sealing hole 51 to further protect the electricity meter, further prevent the upper cover 1 and the base 2 from being disassembled, prevent illegal operation of the electricity meter, eliminate unsafe operation of the electricity meter, and realize the dual anti-theft function of the electricity meter.

[0039] like Figure 3 As shown, the cylindrical pin 7 is made of tungsten steel, and the diameter of the cylindrical pin 7 is 0.2-0.3 mm smaller than the diameter of the lead sealing hole 51.

[0040] In this embodiment, the cylindrical pin 7 is made of tungsten steel. Tungsten steel has good hardness and rigidity, which prevents the cylindrical pin 7 from bending when cutting the cutting part 4, thus affecting the fracture effect of the cutting part 4. The diameter of the cylindrical pin 7 is 0.2-0.3mm smaller than the diameter of the lead sealing hole 51, ensuring that the cylindrical pin 7 can be smoothly inserted into the lead sealing hole 51 to fix the lead sealing part 5.

[0041] The installation process for this screw structure is as follows:

[0042] 1. Use an installation tool (such as a screwdriver) to tighten the fixing part 6 onto the fixing hole 21 of the base 2, so that the top cover 1 fits and is fixed to the base 2;

[0043] 2. Insert the cylindrical pin 7 into the lead seal hole 51 of the lead seal part 5 and the through hole 13 of the upper cover 1 to fix and limit the lead seal part 5.

[0044] 3. Using the installation tool, continue to rotate the rotating part 3. Due to the restriction of the cylindrical pin 7, the inverted conical cut end of the lead seal part 5 breaks, causing the rotating part 3 and the lead seal part 5 to separate, and at the same time, the cylindrical pin 7 is pulled out.

[0045] 4. Install the lead seal in the lead seal hole 51 to complete the installation of the electricity meter cover 1 and base 2.

[0046] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An electric energy meter anti-theft screw structure, characterized in that, An upper cover (1) and a base (2) for mounting an electric energy meter; The screw structure comprises a rotating part (3), a cutting part (4), a lead sealing part (5) and a fixing part (6) connected in sequence; the rotating part (3) is configured to allow the fixing part (6) to pass through the upper cover (1) and screw into the base (2), so that the upper cover (1) and the base (2) are fixedly connected to each other; the cutting part (4) is located between the rotating part (3) and the lead sealing part (5), and the cutting part (4) can be cut under an external force, so that the rotating part (3) and the lead sealing part (5) are cut and separated; the lead sealing part (5) is located in the upper cover (1), and a lead seal can be mounted on the lead sealing part (5).

2. The anti-theft screw structure of the electric energy meter according to claim 1, characterized in that, The upper cover (1) is provided with a mounting hole (11) and a via hole (12) which communicate with each other, the base (2) is provided with a fixing hole (21), the via hole (12) and the fixing hole (21) are arranged opposite to each other, the fixing part (6) sequentially passes through the mounting hole (11) and the via hole (12) and extends into the fixing hole (21), and the fixing part (6) is threadedly connected in the fixing hole (21); a step (22) is formed at the connection between the mounting hole (11) and the via hole (12), and an end of the lead sealing part (5) close to the fixing part (6) abuts against the step (22).

3. The anti-theft screw structure of the electric energy meter according to claim 2, characterized in that, The diameter of the mounting hole (11) is larger than the diameter of the via hole (12), the lead sealing part (5) is in clearance fit with the mounting hole (11), and a clearance between the outer side surface of the lead sealing part (5) and the mounting hole (11) is 0-0.15mm.

4. The anti-theft screw structure of the electric energy meter according to claim 2 or 3, characterized in that, An end of the cutting part (4) close to the lead sealing part (5) is located in the mounting hole (11), the rotating part (3) is located outside the mounting hole (11), and a distance between the end of the cutting part (4) close to the lead sealing part (5) and an opening of the mounting hole (11) is 0-0.15mm.

5. The anti-theft screw structure for an electricity meter according to any one of claims 1-3, characterized in that, An end of the rotating part (3) away from the cutting part (4) is provided with a screw groove (31), and the screw groove (31) is in a "-" shape or a "+" shape.

6. The anti-theft screw structure of the electric energy meter according to any one of claims 1-3, characterized in that, The cutting part (4) is in an inverted conical shape, and the diameter of an end of the cutting part (4) close to the rotating part (3) is larger than the diameter of an end of the cutting part (4) close to the lead sealing part (5); the diameter of the cutting part (4) close to the lead sealing part (5) is d, and 1.8mm ≤ d ≤ 2.2mm.

7. The anti-theft screw structure of the electric energy meter according to claim 6, characterized in that, An included angle between the oblique side of the cutting part (4) and the bottom line of the cutting part (4) is α, and 75° ≤ α ≤ 80°.

8. The anti-theft screw structure for an electricity meter according to any one of claims 1-3, characterized in that, The lead sealing part (5) is provided with a lead sealing hole (51), the upper cover (1) is provided with a through hole (13), and the lead sealing hole (51) corresponds to the through hole (13).

9. The anti-theft screw structure of the electric energy meter according to claim 8, characterized in that, The screw structure further comprises a cylindrical pin (7); when the cutting part (4) needs to be cut by an external force, the cylindrical pin (7) is inserted into the lead sealing hole (51) and the through hole (13).

10. The anti-theft screw structure of the electric energy meter according to claim 9, characterized in that, The cylindrical pin (7) is made of tungsten steel, and the diameter of the cylindrical pin (7) is 0.2-0.3mm smaller than the diameter of the lead sealing hole (51).

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