Anti-disassembly metering wireless transmission open type current transformer

Abstract

The utility model provides an anti-disassembly wireless transmission open type current transformer for metering, and belongs to the technical field of equipment metering and monitoring. After the opening of the mutual inductor is closed, the fixing column and the spring are sequentially mounted in the mounting hole, when the main shell A is matched with the main shell B, the mounting hole corresponds to the limiting hole, one end of the fixing column can extend out of the mounting hole and is inserted into the limiting hole, the main shell A and the main shell B are clamped, and the fixing column is fixed to the main shell B; the opening current transformer is prevented from being disassembled, and the continuity of current metering is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of equipment metering and monitoring technology, and in particular relates to a wireless transmission open-type current transformer for anti-tampering metering. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] An open-type current transformer is a type of current measuring device widely used in power systems, typically for protection, metering, monitoring, and measuring current. It is suitable for applications where disconnecting the main circuit is inconvenient. This type of transformer has an opening, allowing it to be directly fitted onto the cable without breaking the circuit.

[0004] An open-type current transformer contains an iron core, on which a secondary winding of a certain number of turns is typically wound. When the main current passes through the components of the open-type current transformer, a magnetic field is generated around the conductor. This magnetic field forms a closed loop through the iron core, thus affecting the magnetic flux within the core. The change in magnetic flux caused by the change in the magnetic field induces a voltage in the coil, the magnitude of which is proportional to the main current. This design makes installation and disassembly very convenient, saving labor and time costs.

[0005] However, since open-type current transformers can be disassembled by anyone at any time after being installed on the cable, this will have an adverse effect on the management of open-type current transformers and the continuous measurement of current. Utility Model Content

[0006] The purpose of this invention is to provide a wireless transmission open-type current transformer for tamper-proof metering, so as to solve the technical problem that existing open-type current transformers are easy to disassemble and ensure the continuity of current metering.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model provides a tamper-proof, open-type wireless transmission current transformer for metering, comprising:

[0009] Current transformer main unit and anti-tampering unit;

[0010] The main unit of the current transformer includes a main housing A and a main housing B;

[0011] The main housing A and main housing B can be assembled and cooperated to realize the opening and closing of the current transformer;

[0012] The anti-disassembly unit includes a fixing post, a spring, and a plug;

[0013] The main housing A is provided with mounting holes;

[0014] Limiting holes are provided on the main housing B;

[0015] After the opening of the current transformer is closed, the fixing post and the spring are installed into the mounting hole in sequence;

[0016] When the main housing A and the main housing B are fitted together, the mounting hole corresponds to the limiting hole;

[0017] One end of the fixing post can protrude from the mounting hole and be inserted into the limiting hole.

[0018] Furthermore, the fixing column has a cylindrical structure at the front end and a hemispherical structure at the rear end.

[0019] Furthermore, the plug is cylindrical in shape and is installed with an interference fit to the mounting hole.

[0020] Furthermore, the mounting hole is sealed with a plug, and the upper surface of the main housing A is flush with the upper surface of the plug, making it non-removable after installation.

[0021] Furthermore, the main body unit of the current transformer also includes a main housing cover A and a main housing cover B;

[0022] The main housing cover A and the main housing cover B are respectively installed on the main housing A and the main housing B to seal the main housing A and the main housing B.

[0023] Furthermore, it also includes cable fixing units;

[0024] The cable fixing unit includes a drive screw;

[0025] The screw portion of the transmission screw passes through the reserved hole in the main housing A, and the positioning head of the screw is inserted into the positioning hole on the main housing A.

[0026] Furthermore, the cable fixing unit also includes a cable fixing clamp and a shaft elastic retaining ring;

[0027] The cable clamp has a self-locking nut;

[0028] The cable clamp is mounted on the screw of the drive screw.

[0029] Furthermore, the drive screw has a slot.

[0030] Furthermore, the shaft is secured in the slot by an elastic retaining ring.

[0031] Furthermore, it also includes a positioning and metering wireless transmission unit;

[0032] The positioning and metering wireless transmission unit includes a detection circuit board;

[0033] The detection circuit board contains a positioning circuit, a power metering circuit, and a rechargeable circuit.

[0034] The technical solution of this utility model has the following beneficial effects:

[0035] This utility model installs the fixing column, spring, and plug sequentially into the mounting hole. After the opening of the current transformer is closed, when the main housing A and the main housing B are engaged, the mounting hole corresponds to the limiting hole. One end of the fixing column can protrude from the mounting hole and be inserted into the limiting hole, so that the main housing A and the main housing B are locked together, realizing the anti-disassembly of the open current transformer and ensuring the continuity of current measurement.

[0036] The advantages of this invention in additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0038] Figure 1 This is a schematic diagram of the overall structure of an anti-tampering wireless transmission open-type current transformer proposed in this utility model.

[0039] Figure 2 This is a schematic diagram of the component structure of an anti-disassembly wireless transmission open-type current transformer cable fixing unit proposed in this utility model.

[0040] Figure 3 This utility model presents a schematic diagram of the structure of the main housing A(1) of an anti-disassembly wireless transmission open-type current transformer for installing transmission screws and shaft elastic retaining rings.

[0041] Figure 4 This is a schematic diagram of the structure of a tamper-proof wireless transmission open-type current transformer cable fixing unit installed on the main housing A, as proposed in this utility model.

[0042] Figure 5 This is a schematic diagram of the structure of an anti-tampering wireless transmission open-type current transformer anti-tampering unit installed on the main housing A, as proposed in this utility model.

[0043] Figure 6 This utility model presents a schematic diagram illustrating the functional implementation of an anti-tampering unit for an open-type current transformer with anti-tampering wireless transmission.

[0044] Figure 7This is a schematic diagram of the structure of an anti-disassembly wireless transmission open-type current transformer proposed in this utility model, where the main body unit of the transformer is without the installation of the main housing cover A, main housing cover B, and EVA pad.

[0045] Figure 8 This utility model provides a structural diagram of the main housing cover A, main housing cover B, and EVA pad for the installation of the main housing unit of a tamper-proof wireless transmission open-type current transformer.

[0046] Figure 9 This is a schematic diagram of the structure of a tamper-proof wireless transmission open-type current transformer positioning and metering wireless transmission unit detection circuit board installed in a protective cover, as proposed in this utility model.

[0047] Figure 10 A schematic diagram of the structure of the anti-disassembly wireless transmission open-type current transformer positioning metering wireless transmission unit protective cover installed on the main housing A, as proposed in this utility model.

[0048] Figure 11 This utility model presents a schematic diagram of the installation structure of a rechargeable button battery for a positioning and metering wireless transmission unit for an anti-tampering wireless transmission open-type current transformer.

[0049] Figure 12 This is a schematic diagram of the structure of an anti-tampering wireless transmission open-type current transformer installed on a cable, as proposed in this utility model.

[0050] Figure 13 This is a schematic diagram of a tamper-proof wireless transmission open-type current transformer fixing column structure proposed in this utility model.

[0051] The markings in the diagram are: 1. Main housing A, 2. Main housing B, 3. Main housing cover A, 4. Main housing cover B, 5. Iron core, 6. Coil, 7. Elastic insulation material, 8. Limiting O-ring, 9. Transmission screw, 10. Cable clamp, 11. Detection circuit board, 12. Rechargeable button battery, 13. Wire guide ring, 14. Coil lead wire, 15. Signal transmission antenna, 16. Beidou positioning antenna, 17. EVA pad, 18. Spring, 19. Plug, 20. Protective cover, 21. Shaft elastic retaining ring, 22. Self-locking nut, 23. Fixing post, 24. Tailless self-tapping screw, 25. Button battery cover, 26. Cable, 27. Slot, 28. Positioning head, 29. Positioning hole, 30. Reserved hole, 31. Clearance, 32. Limiting hole, 33. Mounting hole, 34. Cylindrical structure, 35. Hemispherical structure, 36. Wire guide hole. Detailed Implementation

[0052] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this utility model.

[0054] Where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0055] This utility model discloses a wireless transmission open-type current transformer for tamper-proof metering, such as... Figure 1 As shown, it includes:

[0056] Current transformer main unit and anti-tampering unit;

[0057] The main unit of the current transformer includes a main housing A1 and a main housing B2;

[0058] The main housing A1 and the main housing B2 can be assembled and cooperated to realize the opening and closing of the current transformer;

[0059] The anti-disassembly unit includes a fixing post 23, a spring 18, and a plug 19;

[0060] The main housing A1 is provided with mounting holes 33;

[0061] The main housing B2 is provided with a limiting hole 32;

[0062] The fixing post 23 and the spring 18 are sequentially installed into the mounting hole 33;

[0063] When the main housing A1 and the main housing B2 are engaged, the mounting hole 33 corresponds to the limiting hole 32;

[0064] One end of the fixing post 23 can protrude from the mounting hole 33 and be inserted into the limiting hole 32.

[0065] In specific implementation methods, such as Figure 13 As shown, the fixed column 23 has a front cylindrical structure 34 and a rear hemispherical structure 35, and the circular cross-section of the cylinder and the circular cross-section of the hemispherical structure are connected to form an integrated structure.

[0066] In specific implementation methods, such as Figure 5 , Figure 6 As shown, the anti-tamper unit includes: a fixing post 23, a spring 18, and a plug 19. (As shown...) Figure 6 As shown, Figure 6For the anti-disassembly function implementation diagram, the fixing post 23, spring 18 and plug 19 are sequentially installed into the mounting hole 33 on the main housing A1. The plug 19 is cylindrical in shape and is installed with an interference fit with the mounting hole 33.

[0067] The mounting hole 33 is sealed with plug 19, ensuring that the upper surface of the main housing A1 is flush with the upper surface of plug 19. Under the pressure of plug 19 and spring 18, the hemispherical structure 35 at the rear end of the fixing post 23 protrudes from the main housing A1, corresponding to the limiting hole 32 of the main housing B2. In use, after the transformer opening is closed, the hemispherical structure 35 protruding from the main housing A1 of the fixing post 23 is inserted into the limiting hole 32 of the main housing B2. After installation, the main housing A and the main housing B are inseparable. If the transformer is to be forcibly removed, the transformer must be completely destroyed, thus achieving the anti-disassembly function.

[0068] In specific implementation methods, such as Figure 7 , Figure 8 As shown, the main unit of the current transformer includes a main housing A1, a main housing B2, a main housing cover A3, a main housing cover B4, an iron core 5, a coil 6, an elastic insulating material 7, a limiting O-ring 8, a wire guide ring 13, a coil lead wire 14, and an EVA pad 17.

[0069] Preferably, the main housing cover A3 and the main housing cover B4 are respectively installed on the main housing A1 and the main housing B2, thereby sealing the main housing A1 and the main housing B2. The main housing A1, the main housing B2, the main housing cover A3, and the main housing cover B4 are injection molded parts made of polycarbonate with a flame retardant rating of V0, which can effectively prevent accidental fires.

[0070] Preferably, the core 5 is made of microcrystalline, microcrystalline alloy, or permalloy, which ensures that the current transformer's detection accuracy is not less than 0.2, enabling the product to meet metrological requirements.

[0071] Preferably, the wire guide ring 13 is fitted into the wire guide hole 36 on the main housing A1, and the iron core 5 with the coil 6 wound on it is installed into the main housing A1 and the main housing B2. The function of the limiting O-ring 8 is to fix the coil 6 in the appropriate position of the iron core 5; the gap between the main housing A1, the main housing B2 and the coil 6 is filled with elastic insulating material 7, the coil lead 14 passes through the hole of the wire guide ring 13, the main housing cover A3 and the main housing cover B4 are installed on the main housing A1 and the main housing B2 respectively, and the EVA pad 17 is pasted in the designated position on the main housing A1.

[0072] In a specific implementation, an open-type current transformer for tamper-proof metering wireless transmission also includes a cable fixing unit and a positioning metering wireless transmission unit.

[0073] Specifically, such as Figure 2, Figure 3 , Figure 4 As shown, the cable fixing unit includes: a transmission screw 9, a cable fixing clamp 10, a shaft elastic retaining ring 21, and a self-locking nut 22, wherein the self-locking nut 22 is embedded in the cable fixing clamp 10.

[0074] Preferably, the screw portion of the transmission screw 9 passes through the reserved hole 30 of the main housing A1, and the positioning head 28 of its head is inserted into the positioning hole 29 on the main housing A1.

[0075] Preferably, the screw portion of the transmission screw 9 passes through the reserved hole 30 of the main housing A1, and the positioning head 28 at the top of the transmission screw 9 is inserted into the positioning hole 29 of the main housing A1. During this process, the cable clamp 10 is screwed onto the screw of the transmission screw 9 through the self-locking nut 22, and the shaft elastic retaining ring 21 is locked into the slot 27 of the transmission screw 9 through the clearance of the main housing A1. The purpose is to prevent the transmission screw 9 from moving. The self-locking nut 22 is used instead of an ordinary nut to prevent the cable clamp 10 from loosening after the current transformer main unit holds the cable 26 for a long time during field installation.

[0076] In specific implementation methods, such as Figure 9 , Figure 10 , Figure 11 As shown, the positioning and metering wireless transmission unit includes a detection circuit board 11, a rechargeable button battery 12, a signal transmission antenna 15, a Beidou positioning antenna 16, a protective cover 20, a tailless self-tapping screw 24, and a button battery cover 25.

[0077] Preferably, the rechargeable button battery 12, signal transmission antenna 15, and Beidou positioning antenna 16 are all electrically connected to the detection circuit board 11. The detection circuit board 11 is clipped into the protective cover 20. The signal transmission antenna 15 and Beidou positioning antenna 16 are both pasted onto the side wall inside the protective cover 20. The coil lead wire 13 is inserted into the detection circuit board 11. The protective cover 20 of the positioning and metering wireless transmission unit is fixed to the outside of the current transformer main unit using self-tapping screws 24. Figure 10 As shown; install the rechargeable button battery 12 and fasten the button battery cover 25.

[0078] Preferably, the detection circuit board 11 contains a positioning circuit, a power metering circuit, and a rechargeable circuit. The positioning circuit provides the user with the location information of the current transformer, with a positioning accuracy at the meter level. The power metering circuit achieves a detection accuracy of 0.2%, and its measurement results can be used in fields such as industrial electricity billing, industrial automation, renewable energy, and environmental protection. The rechargeable circuit, during actual use, automatically supplies power to the detection circuit board 11 and simultaneously charges the rechargeable button battery 12 when the current detected by the current transformer reaches a certain threshold, extending battery life and reducing maintenance costs.

[0079] Working principle of this utility model:

[0080] like Figure 12 As shown, the cable 26 to be tested is inserted into the current transformer. The cable fixing clamp 10 is moved by rotating the transmission screw 9. The cable fixing clamp 10 fixes the main unit of the current transformer to the cable 26. On-site construction does not require damage to the cable protective layer. It is safe, reliable and efficient. It does not require the company to shut down its power or production. No external power line or other lines are required. No external metering and transmission equipment is required. It simplifies the installation process and reduces installation and maintenance costs.

[0081] After the current transformer opening is closed, the fixing post 23 and the spring 18 are sequentially installed into the mounting hole 33. When the main housing A1 and the main housing B2 are engaged, the mounting hole 33 corresponds to the limiting hole 32. One end of the fixing post 23 can protrude from the mounting hole 33 and be inserted into the limiting hole 32, so that the main housing A1 and the main housing B2 are locked together, realizing the anti-disassembly of the open current transformer and ensuring the continuity of current measurement.

[0082] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A wireless transmission open-type current transformer for tamper-proof metering, characterized in that, include: Current transformer main unit and anti-tampering unit; The main unit of the current transformer includes a main housing A and a main housing B; The main housing A and main housing B can be assembled and cooperated to realize the opening and closing of the current transformer; The anti-disassembly unit includes a fixing post, a spring, and a plug; The main housing A is provided with mounting holes; Limiting holes are provided on the main housing B; After the opening of the current transformer is closed, the fixing post and the spring are installed into the mounting hole in sequence; When the main housing A and the main housing B are fitted together, the mounting hole corresponds to the limiting hole; One end of the fixing post can protrude from the mounting hole and be inserted into the limiting hole.

2. The tamper-proof metering wireless transmission open-type current transformer as described in claim 1, characterized in that, The fixed column is cylindrical at the front and hemispherical at the rear.

3. The tamper-proof metering wireless transmission open-type current transformer as described in claim 1, characterized in that, The plug is cylindrical in shape.

4. The tamper-proof metering wireless transmission open-type current transformer as described in claim 1, characterized in that, The mounting hole is sealed with a plug, and the upper surface of the main housing A is flush with the upper surface of the plug.

5. The tamper-proof metering wireless transmission open-type current transformer as described in claim 1, characterized in that, The main unit of the current transformer also includes a main housing cover A and a main housing cover B; The main housing cover A and the main housing cover B are respectively installed on the main housing A and the main housing B to seal the main housing A and the main housing B.

6. The tamper-proof open-type current transformer for metering with wireless transmission as described in claim 1, characterized in that, It also includes cable fixing units; The cable fixing unit includes a drive screw; The screw portion of the transmission screw passes through the reserved hole in the main housing A, and the positioning head of the screw is inserted into the positioning hole on the main housing A.

7. The tamper-proof open-type current transformer for metering with wireless transmission as described in claim 6, characterized in that, The cable fixing unit also includes a cable fixing clamp and a shaft elastic retaining ring; The cable clamp has a self-locking nut; The cable clamp is mounted on the screw of the drive screw.

8. A wireless transmission open-type current transformer for tamper-proof metering as described in claim 7, characterized in that, The drive screw has a slot.

9. A wireless transmission open-type current transformer for tamper-proof metering as described in claim 8, characterized in that, The shaft is secured in the slot by an elastic retaining ring.

10. A wireless transmission open-type current transformer for tamper-proof metering as described in claim 1, characterized in that, It also includes a positioning and metering wireless transmission unit; The positioning and metering wireless transmission unit includes a detection circuit board; The detection circuit board contains a positioning circuit, a power metering circuit, and a rechargeable circuit.

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