Electricity larceny prevention electric energy metering box with plug-in

Abstract

The application provides a power metering box with an insert for preventing electricity stealing, and relates to the technical field of power metering boxes. The power metering box comprises a box body, a power meter and an outer shell. Two frame boxes are fixedly installed on the inner side wall of the box body. A sliding groove is arranged at the end of each frame box. A guide column is arranged in the interior of each frame box. A pre-pressing plate is slidably installed at the end of each guide column. A plurality of metal protrusions are arranged at the end of each pre-pressing plate. A guide rail block is fixedly installed at each side end of the outer shell. A locking plate is fixedly installed at the top of each guide rail block. When the guide rail block and the locking plate are forcibly disassembled, the metal protrusions at the end of the pre-pressing plate will rub against the flexible display plate (ABS plastic material) on the surface of the locking plate, leaving irreversible physical scratches on the surface of the flexible display plate. In combination with the photosensitive developing layer and the fragile sealing strip, the scratches cannot be polished and eliminated, and the electricity stealing evidence function is realized.

Description

Technical Field

[0001] This invention belongs to the technical field of electricity metering boxes, and more specifically, it relates to an anti-theft electricity metering box with plug-in connector. Background Technology

[0002] Electricity metering boxes (also known as electricity meter boxes or power metering boxes) are specialized enclosures in power systems used for the installation, protection, and management of electricity metering devices. They are widely used in various stages of power generation, transmission, distribution, and consumption, and are one of the core infrastructures for achieving accurate electricity metering, electricity billing, and electricity management.

[0003] 1. There are gaps between the plug-in and the base inside the electricity metering box, which allows external wires to be connected for diversion. Most of the wiring terminals are exposed without any enclosure or protection, and the spacing is small. Metal sheets and thin wires can be used to bridge the terminals to bypass and steal electricity, directly causing electricity bill losses and easily leading to electric shock and fire accidents.

[0004] 2. The plug-in can be quickly installed and removed without anti-tamper locking structure. The circuit can be modified without damaging the wiring. The operation is extremely fast and leaves no obvious physical traces. It can be operated as soon as the cover is opened. The seal cannot restrict the terminal parts, and it is impossible to lock the operation time and responsible person. Electricity theft is difficult to detect, difficult to obtain evidence, and difficult to hold accountable, which can easily lead to long-term losses. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides an anti-theft electricity metering box with a plug-in connector, thereby resolving the problems described above.

[0006] An anti-theft electricity metering box with a plug-in assembly includes a box body, an electricity meter, and an outer casing. Two frame boxes are fixedly installed on the inner side wall of the box body. Each frame box has a sliding groove at its end. A guide post is provided inside each frame box. A pre-pressure plate is slidably installed at the end of each guide post. Multiple metal protrusions are provided at the end of each pre-pressure plate. The box also includes: The protective assembly is located at the end of the housing. The protective assembly includes an outer shell, an inner shell, a soft rubber ring, and an insulating sponge. The inner side wall of the outer shell is provided with two supporting ribs. The interior of both the outer shell and the inner shell is provided with multiple mounting holes. Guide rail blocks are fixedly installed on both sides of the outer shell. A locking plate is fixedly installed on the top of each guide rail block. Multiple conical covers are fixedly installed on the inner side of the outer shell. A constraint ring is fixedly installed at the top of each conical cover. A soft hollow ring is provided on the outer surface of each conical cover. A pull cover plate is fixedly installed inside each soft hollow ring. A fiber thread is fixedly installed at the end of each pull cover plate. A protective ring is provided on the outer surface of each soft hollow ring.

[0007] Preferably, each of the locking plates has two flexible display panels on its surface, each flexible display panel is made of ABS plastic, and each of the locking plates has a trapezoidal groove on its surface. Each of the guide posts has a drive screw rotatably mounted inside it, each drive screw is connected to the guide post through a bearing, and each drive screw has a bevel gear at its top end. Each of the frame boxes is provided with a limiting sleeve inside, and each limiting sleeve is provided with a positioning hole inside. The outer surface of each limiting sleeve is connected to the frame box by adhesive bonding.

[0008] Preferably, a cylinder is rotatably installed inside each of the limiting sleeves, a nut sleeve is fixedly installed on the side end of each of the cylinders, and a special-shaped insertion hole is provided on the outer side of each of the nut sleeves; Each of the cylinders has two insertion blocks on its surface, and each insertion block has a flexible conical sleeve on both sides. A transmission rod is fixedly installed at the other end of each cylinder, and a gear ring is fixedly installed on the surface of each transmission rod. Each gear ring has equally spaced threaded grooves on its surface.

[0009] Preferably, each of the transmission rods is slidably fitted with a telescopic joint sleeve at its end, and the end of each telescopic joint sleeve is welded and fixed to the inner side wall of the frame box. Two waterproof and breathable membranes are fixedly installed on the bottom surface of the outer shell, and each of the waterproof and breathable membranes is made of high molecular weight polypropylene. The constraint ring is heat-fused to the small end opening of the cone cover, and the large end of the cone cover is fixed to the wire hole of the outer shell by welding. Finally, the soft hollow ring is put on the outside of the cone cover and bonded to the inner wall of the outer shell.

[0010] Compared with the prior art, the present invention has the following beneficial effects: In this invention, a closed cavity is formed by the outer and inner shells, completely enclosing all the wiring terminals of the electricity meter, with no exposed live parts. When an electricity thief violently pulls or cuts the internal wiring harness, the friction between the wiring harness and the constraint ring and the inner wall of the cone will be transmitted to the pull cover plate through the constraint ring. The pull cover plate tears the soft hollow ring, and the internal polyurethane sealant leaks out and quickly cures when it encounters moisture, completely sealing the wire hole and preventing electricity theft.

[0011] In this invention, when the guide rail block and the locking plate are forcibly pried apart, the metal protrusion at the end of the pre-pressing plate will rub violently against the flexible display panel (ABS plastic material) on the surface of the locking plate, leaving irreversible physical scratches on the surface of the flexible display panel. With the help of the photosensitive developing layer and the fragile seal, the scratches cannot be polished away, thus realizing the function of obtaining evidence of electricity theft.

[0012] In this invention, a specially designed operating handle is inserted into the irregularly shaped insertion hole of the nut sleeve. The insertion block is rotated to align with the slot of the limiting sleeve. The transmission rod is pushed horizontally so that the gear ring and the bevel gear at the top of the drive screw are fully engaged. Only then can the drive screw be rotated to unlock the preload plate. If the unlocking is not completed, the gear ring and the drive screw are in an idle state, and the torque cannot be transmitted, thus completely preventing unauthorized personnel from disassembling the outer shell.

[0013] In this invention, the insulating sponge at the end of the inner shell fills the cavity, which can absorb the vibration generated by the operation of the equipment or external force, reduce abnormal noise, and at the same time, the soft rubber ring is squeezed and deformed to fit tightly to the end of the box, improving the sealing and buffering protection effect. The waterproof and breathable membrane on the bottom of the outer shell allows air to circulate to balance the air pressure inside the box, while blocking rainwater, water vapor and dust from entering, maintaining a dry environment inside the metering box.

[0014] In this invention, the thread helix angle between the drive screw and the pre-pressure plate is less than the friction angle. When the drive screw stops rotating, it can lock itself inside the pre-pressure plate to prevent the pre-pressure plate from loosening. This ensures that the rigid locking state between the outer cover and the box is stable and will not be accidentally unlocked due to vibration or external force. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the box structure of the present invention; Figure 2 This is a schematic diagram of the outer casing structure of the present invention; Figure 3 This is a schematic diagram of the inner casing structure of the present invention; Figure 4 This is a schematic diagram of the cone-shaped cover structure of the present invention; Figure 5 This is a schematic diagram of the locking plate structure of the present invention; Figure 6 This is a schematic diagram of the pre-pressure plate structure of the present invention; Figure 7 This is a schematic diagram of the guide post structure of the present invention; Figure 8 This is a schematic diagram of the transmission rod structure of the present invention; Figure 9 This is the present invention. Figure 4 A magnified structural diagram at point A.

[0016] In the diagram, 11. Box body; 12. Electricity meter; 13. Outer casing; 14. Guide rail block; 15. Locking plate; 16. Flexible display panel; 17. Waterproof and breathable membrane; 18. Inner casing; 19. Soft rubber ring; 21. Insulating sponge; 22. Support rib; 23. Conical cover; 24. Constraint ring; 25. Soft hollow ring; 26. Fiber thread; 27. Pull-out plate; 28. Protective ring; 29. ​​Frame box; 31. Guide column; 32. Preload plate; 33. Metal convex strip; 34. Slide groove; 35. Drive screw; 36. Nut sleeve; 37. Insertion block; 38. Cylinder; 39. Transmission rod; 41. Gear ring; 42. Telescopic joint sleeve; 43. Limiting sleeve. Detailed Implementation

[0017] Example 1 The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0018] Please see Figures 1-9 This invention provides an anti-theft electricity metering box with a plug-in connector, comprising a box body 11, an electricity meter 12, and an outer casing 13. Two frame boxes 29 are fixedly installed on the inner wall of the box body 11. Each frame box 29 has a sliding groove 34 at its end. Each frame box 29 has a guide post 31 inside, and a pre-pressure plate 32 is slidably installed at the end of each guide post 31. Each pre-pressure plate 32 has multiple metal protrusions 33 at its end. The outer casing 13 is made of metal, and the inner casing 18 is made of rubber. A gap is provided between the outer casing 13 and the inner casing 18. Supporting ribs 22 are fixedly installed on the inner side of the outer casing 13, providing support for the outer casing 13. The outer casing 13 and the inner casing 18 are fully closed, allowing… The terminals are fully enclosed with no exposed live parts. The outer casing 13 and the inner casing 18 form an anti-pry cavity, reducing the space for tools to enter and preventing electricity theft. By rotating the drive screw 35 clockwise, the drive screw 35 generates a thrust on the pre-pressure plate 32, causing the pre-pressure plate 32 to slide downward along the surface of the guide post 31. The end of the pre-pressure plate 32 has a tapered structure. The pre-pressure plate 32 is inserted into the surface of the locking plate 15, which can fix the position of the guide block 14 and the locking plate 15. The outer casing 13 and the inner casing 18 are combined and fixed to the wire harness connection end of the housing 11. The thread helix angle of the drive screw 35 and the pre-pressure plate 32 is less than the friction angle. The drive screw 35 stops rotating and can lock itself with the inside of the pre-pressure plate 32, fixing the position of the pre-pressure plate 32. The protective assembly is located at the end of the housing 11. The protective assembly includes an outer shell 13, an inner shell 18, a soft rubber ring 19, and insulating sponge 21. Two supporting ribs 22 are provided on the inner side wall of the outer shell 13. Multiple mounting holes are provided inside both the outer shell 13 and the inner shell 18. Guide rail blocks 14 are fixedly installed on both sides of the outer shell 13. A locking plate 15 is fixedly installed on the top of each guide rail block 14. By moving the outer shell 13, the outer shell 13 and the inner shell 18 form an integrated structure. The outer shell 13 drives the inner shell 18 to align with the end of the energy meter 12. A soft rubber ring 19 is provided on the top of the inner shell 18. The soft rubber ring 19 presses against the end of the housing 11. The deformation of the soft rubber ring 19 increases the tightness of the connection between the inner cover 18 and the energy meter 12. Through the cooperation of the outer cover 13 and the inner cover 18, all wiring terminals are sealed to achieve basic insulation protection. At the same time, an insulating sponge 21 is installed at the end of the inner cover 18. The insulating sponge 21 is fixed inside the cavity and can absorb vibration and reduce abnormal noise. When installing the wire harness, first pass the wire harness through the inside of each hole. The wire harness slides inside the cone cover 23. Guided by the cone cover 23, the wire harness passes through the inside of the constraint ring 24. The constraint ring 24 is made of elastic material and can expand and contract outward. Through the constraint ring 24 adhering to the surface of the wire harness, the cone cover 23 and the constraint ring 24 seal one side of the wire harness. Multiple conical shields 23 are fixedly installed on the inner side of the outer casing 13. A constraint ring 24 is fixedly installed at the top of each conical shield 23. A soft hollow ring 25 is provided on the outer surface of each conical shield 23. A pull cover plate 27 is fixedly installed inside each soft hollow ring 25. A fiber thread 26 is fixedly installed at the end of each pull cover plate 27. A protective ring 28 is provided on the outer surface of each soft hollow ring 25. When the wire harness inside the outer casing 13 and the inner casing 18 is directly cut, by pulling the wire harness, the wire harness is connected to the inner wall of the conical shield 23 and the constraint ring 24. Friction occurs when the friction applied to the wire harness is too great. The tension is transmitted to the cover plate 27 through the constraint ring 24. The cover plate 27 drives the fiber filament 26 to move. The fiber filament 26 is connected to the inner wall of the soft hollow ring 25. The interior of the soft hollow ring 25 is pre-filled with polyurethane sealant. The surface of the soft hollow ring 25 is torn open by the cover plate 27, and the polyurethane sealant inside the soft hollow ring 25 leaks out. The polyurethane sealant cures when it comes into contact with moisture in the air, directly sealing the wire holes inside the outer cover 13 and the inner cover 18, preventing electricity theft by damaging the wire harness. Each locking plate 15 has two flexible display panels 16 on its surface. Each flexible display panel 16 is made of ABS plastic. Each locking plate 15 has a trapezoidal groove on its surface. Since there is a gap at the connection end between the locking plate 15 and the frame box 29, the guide rail block 14 and the locking plate 15 can be forcibly disassembled by prying the edges. This allows the guide rail block 14 and the locking plate 15 to slide away from the inside of the slide groove 34, and the outer cover 13 can be disassembled. Since the position of the pre-pressure plate 32 is fixed, the end of the pre-pressure plate 32 directly rubs against the surface of the locking plate 15. In particular, the metal convex strip 33 directly rubs against the flexible display panel 16. The squeezing of the metal convex strip 33 will leave marks on the surface of the flexible display panel 16. The opening marks are irreversible, which improves the evidence of electricity theft. Each guide post 31 has a drive screw 35 rotatably mounted inside it. Each drive screw 35 is connected to the guide post 31 via a bearing. Each drive screw 35 has a bevel gear at its top. The drive screw 35 can rotate freely inside the guide post 31. While the drive screw 35 is rotating, a threaded groove is provided on its surface. The drive screw 35 drives the preload plate 32 to move. Rotating the drive screw 35 clockwise causes the preload plate 32 to slide downward. Rotating the drive screw 35 counterclockwise causes the preload plate 32 to slide upward. The preload plate 32 slides out of the interior of the locking plate 15, unlocking the position of the locking plate 15. Each frame box 29 has a limiting sleeve 43 inside, and each limiting sleeve 43 has a positioning hole inside. The outer surface of each limiting sleeve 43 is connected to the frame box 29 by adhesive. Only by rotating the nut sleeve 36 to align the plug block 37 with the limiting sleeve 43 and pushing the plug block 37 horizontally out of the limiting sleeve 43 can the position of the transmission rod 39 and the gear ring 41 be unlocked. When the plug block 37 and the cylinder 38 are inside the limiting sleeve 43, the gear ring 41 does not engage with the top of the drive screw 35, and the transmission rod 39 can only drive the gear ring 41 within the frame box. During the internal idling of 29, the limiting sleeve 43 and the trapezoidal end of the plug-in block 37 are precisely matched. Only when the plug-in block 37 is rotated to the aligned position can it be pushed horizontally into the slot. Before the cylinder 38 rotates to the unlocking angle, the conical sleeve is always locked against the inner wall of the limiting sleeve 43 to prevent the plug-in block 37 from accidentally sliding into the slot. In the idling state, the axial misalignment distance between the gear ring 41 and the bevel gear at the top of the drive screw 35 is 5mm, and the circumferential tooth profile is completely misaligned, so the torque cannot be transmitted. Only when the transmission rod 39 is pushed into place can the gear ring 41 and the bevel gear be fully engaged, allowing the drive screw 35 to rotate. Each limiting sleeve 43 has a cylinder 38 rotatably installed inside, and a nut sleeve 36 is fixedly installed on the side end of each cylinder 38. Each nut sleeve 36 has an irregularly shaped insertion hole on its outer side. By connecting the special operating handle with the nut sleeve 36, the nut sleeve 36 is driven to rotate inside the limiting sleeve 43. The nut sleeve 36 drives the cylinder 38 to rotate synchronously. The special operating handle and the two unlocking steps prevent the outer cover 13 from being disassembled at will. Each cylinder 38 has two insertion blocks 37 on its surface. Each insertion block 37 has an elastic conical sleeve on both sides. By rotating the cylinder 38, the cylinder 38 drives the insertion blocks 37 to rotate on the inner wall of the limiting sleeve 43. The elastic conical sleeves on both sides of the insertion block 37 slide away from the inner wall of the limiting sleeve 43. The insertion blocks 37 align with the slot inside the limiting sleeve 43. By pressing the nut sleeve 36, the nut sleeve 36 drives the cylinder 38 to slide horizontally. The cylinder 38 drives the transmission rod 39 to move inside the frame box 29 to adjust the position of the gear ring 41. A transmission rod 39 is fixedly installed at the other end of each cylinder 38. A gear ring 41 is fixedly installed on the surface of each transmission rod 39. Each gear ring 41 has equally spaced threaded grooves on its surface. By pushing the transmission rod 39 to slide, the transmission rod 39 drives the gear ring 41 to move. The gear ring 41 engages with the bevel gear at the top of the drive screw 35, and the gear ring 41 drives the drive screw 35 to rotate. Each transmission rod 39 has a telescopic joint sleeve 42 slidably installed at its end. The end of each telescopic joint sleeve 42 is welded and fixed to the inner side wall of the frame box 29. At the same time, the end of the transmission rod 39 is connected to the telescopic joint sleeve 42. The telescopic joint sleeve 42 has a multi-segment structure and can extend and retract freely. The telescopic joint sleeve 42 plays a supporting and guiding role for the transmission rod 39, ensuring the stability of the sliding of the transmission rod 39. Two waterproof and breathable membranes 17 are fixedly installed on the bottom surface of the outer shell 13. Each waterproof and breathable membrane 17 is made of high molecular polypropylene. Air can freely pass through the waterproof and breathable membrane 17 to enter the interior of the outer shell 13, balancing the air pressure. Rainwater, water vapor and dust are blocked by the membrane and cannot enter the outer shell 13. The constraint ring 24 is heat-fused to the small end opening of the cone shroud 23. The large end of the cone shroud 23 is welded to the wire hole of the outer casing 13. Finally, the soft hollow ring 25 is fitted onto the outside of the cone shroud 23 and bonded to the inner wall of the outer casing 13. When threading the wire harness, the end of the wire harness is first fitted into the conical guide head (the outer diameter is slightly larger than the inner diameter of the constraint ring 24), and the wire harness is slowly pushed through the constraint ring 24 to avoid the instantaneous friction force exceeding the trigger threshold. At the same time, a lubricating coating (polytetrafluoroethylene) is set on the inner wall of the cone shroud 23 to reduce the friction coefficient during normal wire threading and ensure that the soft hollow ring 25 will only be triggered to break when the electric electricity is stolen by violent pulling.

[0019] Example 2 This embodiment specifically discloses an anti-theft electricity metering box with a plug-in, including the following steps: The first step is to fix the electricity meter 12 inside the box 11, completing the basic assembly of the core components of electricity metering. The outer shell 13 (metal material) and the inner shell 18 (rubber material) are an integral structure with an anti-pry cavity between them. Push the outer shell 13 to align the inner shell 18 with the terminal of the electricity meter 12. The soft rubber ring 19 at the top of the inner shell 18 is squeezed and deformed, tightly fitting the end of the box 11 to improve sealing and insulation performance. The insulating sponge 21 at the end of the inner shell 18 fills the cavity to absorb vibration, reduce abnormal noise, and provide auxiliary buffer protection. The wire harness passes through the mounting holes of the outer shell 13 and the inner shell 18 in sequence. The wire harness is guided by the cone cover 23 and passes through the elastic constraint ring 24. The constraint ring 24 expands outward to tightly wrap the surface of the wire harness, achieving side sealing of the wire harness. The waterproof and breathable membrane 17 (high molecular weight polypropylene material) on the bottom of the outer shell 13 allows air circulation to balance the air pressure inside the box, while blocking rainwater, water vapor and dust from entering and maintaining a dry internal environment. The guide blocks 14 on both sides of the outer casing 13 slide into the end groove 34 of the frame box 29 inside the housing 11, aligning the locking plate 15 with the frame box 29. The specially designed operating handle is inserted into the irregularly shaped insertion hole of the nut sleeve 36. Rotating the nut sleeve 36 drives the cylinder 38 to rotate, causing the elastic conical sleeves on both sides of the insertion block 37 to slide out of the inner wall of the limiting sleeve 43, aligning with the groove. Pressing the nut sleeve 36 pushes the cylinder 38 and the transmission rod 39 to slide horizontally, so that the gear ring 41 and the drive screw 35... The bevel gear at the top engages precisely, and the rotating nut sleeve 36 transmits torque through the transmission rod 39 and gear ring 41, driving the lead screw 35 to rotate clockwise, pushing the preload plate 32 to slide downward along the guide post 31. The tapered structure at the end of the preload plate 32 inserts into the trapezoidal groove of the locking plate 15, completing the rigid locking of the guide block 14, the locking plate 15, and the housing 11. The thread helix angle between the drive lead screw 35 and the preload plate 32 is less than the friction angle, achieving self-locking and preventing the preload plate 32 from loosening.

[0020] The second step involves the closed cavity formed by the outer casing 13 and the inner casing 18, which completely encloses all wiring terminals, leaving no exposed live parts. This also reduces the space for tools to enter, achieving basic anti-pry and anti-theft functions. When the internal wiring harness is forcibly pulled or cut, the harness rubs against the inner walls of the constraint ring 24 and the cone cover 23, generating tension. This tension is transmitted through the constraint ring 24 to the pull cover plate 27, which tears the surface of the soft hollow ring 25, causing the internal polyurethane sealant to leak out. Upon contact with air and moisture, this sealant quickly solidifies, completely sealing the wiring holes and preventing theft. When the guide rail block 14 and the locking plate 15 are forcibly slid together by prying off the edges, the metal protrusion 33 at the end of the preload plate 32 violently contacts the flexible display panel 16 (ABS plastic) on the surface of the locking plate 15. Friction and the squeezing of the metal convex strip 33 will leave irreversible opening marks on the surface of the flexible display panel 16, providing direct evidence for electricity theft. Without using the special operating handle or without completing the two unlocking steps (rotating the alignment plug 37 → horizontally pushing the meshing gear ring 41), the transmission rod 39 can only drive the gear ring 41 to rotate freely and cannot drive the lead screw 35 to rotate. The outer cover 13 cannot be unlocked and disassembled to prevent unauthorized personnel from operating it. The surface of the flexible display panel 16 is pre-coated with a photosensitive developing layer. After the marks are formed, they can be cured after being exposed to natural light for 10 minutes, forming irreversible physical scratches. At the same time, a fragile seal is set on the edge of the locking plate 15. Once the marks are polished away, the seal will inevitably break, which can be directly identified as a tampering. The polyurethane sealant fills 90% of the inner volume of the soft hollow ring 25, leaving a 10% expansion space to prevent the sealant from overflowing at room temperature. The fiber wire 26 and the pull cover plate 27 are bonded by hot melt to ensure that they break first under the pulling force of electricity theft. They will not be accidentally triggered during normal wiring harness installation / maintenance. The fiber wire 26 can reliably tear the connection surface between the pull cover plate 27 and the soft hollow ring 25, triggering the sealant to leak out. Maintenance personnel use a special operating handle to insert into the irregularly shaped socket of the nut sleeve 36, repeating the two unlocking steps of the installation stage, so that the gear ring 41 meshes with the bevel gear of the drive screw 35, and rotate the nut sleeve 36 counterclockwise. The drive screw 35 is rotated in the opposite direction through the transmission chain, causing the preload plate 32 to slide upward along the guide post 31. The tapered structure at the end of the preload plate 32 exits the trapezoidal groove of the locking plate 15, releasing the lock. The guide rail block 14 and the locking plate 15 are slid outward along the slide groove 34, and the outer cover 13 and the inner cover 18 are removed from the wiring terminal of the box 11 to expose the wiring terminal for maintenance. After maintenance is completed, the outer cover 13 and the inner cover 18 are slid back into position, and the locking process of the installation stage is repeated to restore the fully enclosed anti-theft state.

[0021] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A plug-in anti-theft electricity metering box, comprising a box body (11), an electricity meter (12), and an outer casing (13), characterized in that, The inner wall of the housing (11) is fixedly installed with two frame boxes (29), each frame box (29) has a sliding groove (34) at its end, each frame box (29) has a guide post (31) inside, each guide post (31) has a pre-pressure plate (32) slidably installed at its end, and each pre-pressure plate (32) has multiple metal protrusions (33) at its end. The housing also includes: The protective assembly is located at the end of the housing (11). The protective assembly includes an outer shell (13), an inner shell (18), a soft rubber ring (19), and an insulating sponge (21). The inner side wall of the outer shell (13) is provided with two supporting ribs (22). The interior of both the outer shell (13) and the inner shell (18) is provided with multiple mounting holes. Guide rail blocks (14) are fixedly installed on both sides of the outer shell (13). A locking plate (15) is fixedly installed on the top of each guide rail block (14). Multiple conical covers (23) are fixedly installed on the inner side of the outer shell (13). A constraint ring (24) is fixedly installed at the top of each conical cover (23). A soft hollow ring (25) is provided on the outer surface of each conical cover (23). A pull cover plate (27) is fixedly installed inside each soft hollow ring (25). A fiber thread (26) is fixedly installed at the end of each pull cover plate (27). A protective ring (28) is provided on the outer surface of each soft hollow ring (25).

2. The anti-theft electricity metering box with plug-in as described in claim 1, characterized in that, Each of the locking plates (15) has two flexible display panels (16) on its surface. Each of the flexible display panels (16) is made of ABS plastic. Each of the locking plates (15) has a trapezoidal groove on its surface.

3. The anti-theft electricity metering box with plug-in as described in claim 1, characterized in that, Each of the guide posts (31) has a drive screw (35) rotatably mounted inside it. Each drive screw (35) is connected to the guide post (31) via a bearing. Each drive screw (35) has a bevel gear at its top end.

4. The anti-theft electricity metering box with plug-in as described in claim 1, characterized in that, Each of the frame boxes (29) is provided with a limiting sleeve (43) inside, and each of the limiting sleeves (43) is provided with a positioning hole inside. The outer surface of each limiting sleeve (43) is connected to the frame box (29) by adhesive bonding.

5. The anti-theft electricity metering box with plug-in as described in claim 4, characterized in that, Each of the limiting sleeves (43) has a cylinder (38) rotatably mounted inside, and a nut sleeve (36) is fixedly mounted on the side end of each of the cylinders (38). Each of the nut sleeves (36) has a shaped insertion hole on its outer side.

6. The anti-theft electricity metering box with plug-in as described in claim 5, characterized in that, Each of the cylinders (38) has two plug-in blocks (37) on its surface, and each plug-in block (37) has a resilient conical sleeve on both sides.

7. The anti-theft electricity metering box with plug-in as described in claim 5, characterized in that, A transmission rod (39) is fixedly installed at the other end of each cylinder (38), and a gear ring (41) is fixedly installed on the surface of each transmission rod (39), and each gear ring (41) is provided with equally spaced threaded grooves on its surface.

8. The anti-theft electricity metering box with plug-in as described in claim 7, characterized in that, Each of the transmission rods (39) has a telescopic sleeve (42) slidably installed at its end, and the end of each telescopic sleeve (42) is welded and fixed to the inner wall of the frame box (29).

9. A plug-in-operated anti-theft electricity metering box as described in any one of claims 1-8, characterized in that, Two waterproof and breathable membranes (17) are fixedly installed on the bottom surface of the outer shell (13), and each of the waterproof and breathable membranes (17) is made of high molecular weight polypropylene.

10. A plug-in-operated anti-theft electricity metering box as described in any one of claims 1-8, characterized in that, The constraint ring (24) is heat-fused to the small end opening of the cone cover (23), and the large end of the cone cover (23) is welded to the wire hole of the outer shell (13). Finally, the soft hollow ring (25) is put on the outside of the cone cover (23) and bonded to the inner wall of the outer shell (13).

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