Plug-in type electricity meter connection terminal and electric energy metering box

Abstract

The application discloses a plug-in type electric meter connecting terminal and an electric energy metering box, and solves the problems of traditional electric meter wiring terminal faults, automatic power-off, easy fire, complicated disassembly and assembly, and loose cable. The device comprises an insulating plate, a guide column, a ceramic sleeve, a sliding block, a clamp, a terminal and a clamping plate. The insulating plate is mounted on the electric meter with the guide column, the guide column is in plug-in communication with the terminal, the ceramic sleeve is divided into grooves to isolate each phase line, the sliding block is internally provided with a fuse holder and a spring clamp, the terminal is provided with a spring plate and a screw for locking, and the clamping plate has the functions of positioning the ceramic sleeve and regularizing the cable. When the temperature of the fault rises, the fuse holder fails, the spring pushes the sliding block to separate the terminal from the guide column, the fault loop is automatically cut off, and blind closing and fire are prevented. The plug-in modular structure is adopted as a whole, the clamp and the terminal double-fix the cable, the wiring is neat, the disassembly and assembly are convenient, the low-voltage power safety is effectively improved, and the practicability is high.

Description

Technical Field

[0001] This invention relates to the field of electricity meter connection terminals, and more particularly to a pluggable electricity meter connection terminal and an electricity metering box. Background Technology

[0002] In a direct-flow electricity meter, the phase and neutral wire terminals conduct electricity through the main metering circuit. All load current from the electrical equipment flows directly through these terminals, making it a typical high-current-carrying connection structure. When an electrical fault such as an overload or short circuit occurs, the instantaneous surge current generates a large amount of heat at the connection points, causing the outer insulating plastic parts of the terminals to carbonize, burn, and break, compromising their insulation performance. After a fault causes the circuit breaker to trip, many users in rural areas, lacking professional electrical safety knowledge, repeatedly attempt to reconnect the circuit breaker without understanding the cause of the fault. Blindly reconnecting the circuit breaker can re-establish the fault circuit, generating a high-temperature arc that can easily burn the conductive parts of the terminals and damage the meter itself. In severe cases, this can lead to electrical fires, posing extremely high risks to personal safety and property.

[0003] Therefore, this application provides a pluggable electricity meter connection terminal and an electricity metering box. Summary of the Invention

[0004] The present invention is achieved through the following technical solution: The present invention discloses a pluggable electricity meter connection terminal and an electricity metering box, including a guide post, a ceramic sleeve and a clamp. One end of the guide post is electrically connected to the electricity meter, and the other end of the guide post is pluggably connected to one end of the terminal. The terminal is sleeved in a slider, the slider is pluggably disposed in the ceramic sleeve, and the clamp is retractably disposed on the ceramic sleeve.

[0005] Preferably, the ceramic sleeve has multiple mounting grooves, and the ceramic sleeve between adjacent mounting grooves has a partition groove, and the top of the ceramic sleeve is threaded with a screw.

[0006] Preferably, the guide post is embedded in an insulating plate.

[0007] Preferably, the slider has an inner sleeve, and the slider around the inner sleeve is provided with a fusible bracket at intervals. The slider around the fusible bracket has a heat insulation cavity and a limiting cavity, and the clamp is disposed in the limiting cavity.

[0008] Preferably, the clamp includes a fixed block, a spring, a limiting block, a clamp, a round hole, a knob, and a rubber sheet. The fixed block is fixed in the limiting cavity, the limiting block is slidably disposed in the limiting cavity, and a spring is provided between the fixed block and the limiting block.

[0009] Preferably, the limiting block is provided with a clamp, the clamp has a circular hole, a rubber sheet is fitted inside the circular hole, and the rubber sheet is set on the clamp by a knob.

[0010] Preferably, the inner sleeve is provided with a terminal, the end of the terminal is provided with an end plate, the end plate is provided with a contact, and the contact is pluggably connected to the guide post.

[0011] Preferably, the terminal has a spring piece on its top, and the spring piece has a protrusion that engages with a screw.

[0012] Preferably, the device includes the aforementioned electricity meter, wherein the electricity meter, ceramic sleeve, and insulating plate on the guide post are all disposed inside the housing, and the housing is further provided with a clamping plate in conjunction with the ceramic sleeve.

[0013] Preferably, the box body has a door, a magnet is provided on the side of the box body to attract the door magnetically, ventilation slots are symmetrically provided on the side of the box body, a fixing pad is also provided on the box body, and a bottom opening is provided at the bottom of the box body.

[0014] The present invention has the following advantages: 1. The slider is equipped with a fuse holder. When the circuit is overloaded or short-circuited and overheats, the fuse holder fails, and the internal spring of the clamp pushes the slider outward, separating the terminal contacts from the meter side guide post, physically disconnecting the main circuit. After the circuit is disconnected, even if the operator reverses the circuit breaker, the circuit cannot be restored to conduction, preventing continuous arcing. The slider also features a heat insulation cavity, which isolates the heat generated by the fuse, preventing damage to other structures and eliminating the risk of continuous arcing and fire from a usability perspective.

[0015] 2. The ceramic sleeve has multiple independent mounting slots, and each mounting slot is equipped with only one set of sliders. The adjacent mounting slots are separated by partitions to isolate the conductive structures of each phase, increase the interphase isolation space, avoid the transmission of fault arc between different phases, and reduce the probability of interphase short circuit faults.

[0016] 3. The terminal assembly is based on a slider unit, which can be directly pulled out and inserted into the mounting slot of the ceramic sleeve. During assembly, simply push in the slider to complete the conductive connection; during disassembly, simply pull out the slider to disconnect the meter from the external circuit, without disassembling the meter. In case of a circuit failure, only the faulty slider assembly needs to be replaced; the ceramic sleeve and meter can be reused, reducing replacement costs and shortening on-site operation time.

[0017] 4. The external wire passes through the round hole of the clamp, and rotating the knob clamps the cable sheath with the rubber sheet; the screw on the top of the ceramic sleeve presses down on the protrusion of the spring, locking the internal terminal and forming a double-limiting and fixing structure. This structure can prevent the cable from loosening due to pulling or vibration, ensure continuous conductive contact, and reduce heat generation problems caused by poor contact.

[0018] 5. The insulating plate separates the multiple guide posts from each other, and the slider is equipped with a separate limiting cavity for the clamp. The conductive components of each phase are arranged independently in separate zones, which reduces close contact between conductive components, reduces the probability of creepage and leakage faults during line operation, and improves the overall operational stability of the device. Attached Figure Description

[0019] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a perspective view of the meter connection terminals and the meter itself according to the present invention. Figure 3 This is a perspective view of the meter connection terminals of the present invention; Figure 4 For the present invention Figure 3 Explosion-proof 3D image; Figure 5 For the present invention Figure 4 Rear view; Figure 6 This is an exploded perspective view of the ceramic sleeve in the meter connection terminal of the present invention; Figure 7 This is a schematic diagram of the clamp in the meter connection terminal of the present invention; Figure 8 This is a schematic diagram of the clamp in the meter connection terminal of the present invention; Figure 9 This is a schematic diagram of the ceramic sleeve in the meter connection terminal of the present invention; Figure 10 For the present invention Figure 9 A partial 3D view of the ceramic sleeve; Figure 11 For the present invention Figure 9 Exploded 3D view of the ceramic sleeve; Figure 12 This is a cross-sectional view of the meter connection terminals of the present invention.

[0020] In the diagram: box body 100, box door 101, magnet block 102, ventilation slot 103, bottom opening 104, fixing pad 105; Insulating plate 200, guide post 201; Ceramic sleeve 300, mounting groove 300a, partition groove 300b, screw 301, slider 302, waist-shaped groove 302a, built-in sleeve 302b, fusion bracket 302c, heat insulation cavity 302e, limiting cavity 302f; Clamp 400, fixing block 401, spring 402, limit block 403, clamp 404, round hole 405, knob 406, rubber sheet 407; Terminal 500, spring 501, protrusion 502, end plate 503, contact 504; 600 wires, 700 clamps, 800 electricity meter. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. In the description of the present invention, words such as "front", "rear", "left", and "right" that indicate orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0022] Example The embodiment discloses a pluggable electricity meter connection terminal and an electricity metering box, such as Figures 1-12 As shown, the device comprises two main parts: the electricity metering box body 100 and the pluggable electricity meter connection terminals. It addresses the safety issue of carbonization of the insulation components at the terminals of the direct-connect electricity meter 800 after overload or short-circuit faults, which could lead to arcing and fire caused by users blindly closing the circuit breaker. The entire device achieves conductivity through the pluggable connection between the meter-side guide post 201 and the internal terminal 500 of the slider 302. A ceramic sleeve 300 serves as a high-temperature resistant insulating base. The slider 302 contains a low-melting-point fuse bracket 302c and a clamp 400 with a spring 402. When the circuit fault causes temperature rise, the fuse bracket 302c melts, and the spring 402 automatically disengages the terminal 500 from the guide post 201, cutting off the fault circuit and mitigating fire risk.

[0023] like Figure 1 As shown, in this embodiment, the enclosure 100 is integrally stamped from sheet metal. A hinged door 101 is attached to the front of the enclosure 100, and magnets 102 are fixed to the side walls of the enclosure 100. When the door 101 is closed, it is magnetically attached and fixed. Vertical ventilation slots 103 are symmetrically provided on the left and right sides of the enclosure 100, allowing air convection to remove the heat generated by the energy meter 800 and terminals. Fixing pads 105 with mounting holes are provided at both ends of the top of the enclosure 100 for wall mounting. A long bottom opening 104 is provided at the bottom of the enclosure 100, through which external power cables 600 can pass into the enclosure. A horizontally fixed clamping plate 700 is provided at the bottom of the enclosure 100, with positioning slots. The ceramic sleeve 300 is integrally fitted into the slots of the clamping plate 700, preventing displacement of the ceramic sleeve 300 during terminal insertion and removal. The electricity meter 800 is suspended on the upper part of the box 100. The bottom terminal of the electricity meter 800 is equipped with an insulating plate 200. Multiple guide posts 201 are embedded in the insulating plate 200. One end of the guide post 201 is connected to the internal metering circuit of the electricity meter 800, and the other end extends horizontally outward to form a male plug connection structure.

[0024] like Figure 2 , Figure 4As shown, in this embodiment, the insulating plate 200 is a flame-retardant insulating plastic strip component. Through holes are evenly distributed on the insulating plate 200, and guide posts 201 are embedded in each of these through holes. Electrical isolation is achieved between adjacent guide posts 201 via the insulating plate 200. The guide posts 201 are made of silver-plated copper, exhibiting excellent conductivity and capable of carrying high-load operating current.

[0025] like Figure 9 , Figure 11 , Figure 12 As shown, in this embodiment, the ceramic sleeve 300 is made of high-temperature resistant insulating ceramic by sintering. Multiple sets of square mounting slots 300a are evenly distributed along the length of the ceramic sleeve 300. Each set of mounting slots 300a corresponds to a set of sliders 302. Hollowed-out partitions 300b are formed between adjacent mounting slots 300a to increase the interphase insulation distance and prevent cross-phase conduction of fault arcs. Threaded holes are machined on the top of the ceramic sleeve 300 corresponding to each mounting slot 300a, and locking screws 301 are installed in the threaded holes. A waist-shaped groove 302a is formed on the side wall of the slider 302. The waist-shaped groove 302a provides space for the screws 301 to adjust up and down, without obstructing the overall pulling and pulling of the slider 302.

[0026] like Figure 11 , Figure 12 As shown, in this embodiment, the slider 302 is a flame-retardant insulating plastic component, which can be inserted and removed into the mounting groove 300a of the ceramic sleeve 300. A through-type inner sleeve 302b is provided at the center of the slider 302, and the terminal 500 passes through the inner sleeve 302b to achieve radial limiting. A low-melting-point alloy fusing bracket 302c is arranged around the inner sleeve 302b, and a heat insulation cavity 302e is opened on the outside of the fusing bracket 302c. The high temperature and electric arc generated by fusing are isolated by the heat insulation cavity 302e, preventing the plastic body of the slider 302 from melting. An independent and closed limiting cavity 302f is provided on the side of the slider 302, and the clamp 400 is assembled inside the limiting cavity 302f. The clamp 400 can only slide and extend along the direction in which the wire 600 passes through.

[0027] like Figure 7 , Figure 10As shown, in this embodiment, the clamp 400 includes a fixing block 401, a spring 402, a limiting block 403, a clamp 404, a circular hole 405, a knob 406, and a rubber sheet 407. The fixing block 401 is interference-fitted into the inner end of the limiting cavity 302f. The two ends of the compression spring 402 abut against the fixing block 401 and the limiting block 403 respectively. Under normal conditions, the spring 402 continuously pushes the limiting block 403 outward. The limiting block 403 is slidably fitted inside the limiting cavity 302f, and the outer side is integrally connected to the annular clamp 404. A circular hole 405 is opened in the center of the clamp 404, and the wire 600 passes through the circular hole 405. The inner wall of the circular hole 405 is fitted with the arc-shaped rubber sheet 407. Rotating the knob 406 on the side wall of the clamp 404 can press the rubber sheet 407, clamping the wire 600 passing through the circular hole 405 and preventing the cable from loosening due to force. After loosening the locking screw 301, the spring 402 will automatically release the rubber sheet 407, and the wire 600 can be pulled out directly.

[0028] like Figure 8 , Figure 12 As shown, in this embodiment, terminal 500 is an integral tin-plated copper conductive component, which is entirely inserted into the inner sleeve 302b of slider 302. A widened hexagonal end plate 503 is provided at the end of terminal 500 facing the electricity meter 800. An elastic contact 504 is provided at the center of end plate 503, which can be tightly inserted into the meter-side guide post 201 to conduct current. An elastic spring piece 501 is stamped upwards on the top of terminal 500. A protrusion 502 is provided on the surface of the spring piece 501. When the top screw 301 of ceramic sleeve 300 is tightened downwards, the bottom end of screw 301 presses against the protrusion 502, locking terminal 500 inside slider 302. After loosening screw 301, spring piece 501 springs back, and terminal 500 can be pulled out together with slider 302. A hollow cavity is provided at the tail of terminal 500, and the copper core of external wire 600 extends into the cavity to form a conductive connection with terminal 500.

[0029] like Figure 1 , Figure 12 As shown, in this embodiment, the external wire 600 is inserted into the box through the bottom opening 104 of the box 100, first passing through the round hole 405 of the clamp 404 of the holder 400, and then clamped and fixed by the rubber sheet 407. After that, the copper core of the wire 600 extends into the hollow cavity at the tail of the terminal 500 to form a complete power transmission path.

[0030] like Figures 2 to 12As shown, in this embodiment, during conventional assembly, the clamping plate 700 is first fixed to the bottom of the housing 100, the ceramic sleeve 300 is inserted into the clamping plate 700 slot, and the electricity meter 800, along with the insulating plate 200 and guide post 201, is pre-installed on the upper part of the housing 100. Then, the clamp 400 is installed into the limiting cavity 302f of the slider 302, and the terminal 500 is inserted into the inner sleeve 302b of the slider 302. The assembled slider 302 is then horizontally inserted into the ceramic sleeve 300 mounting slot 300a. The external wire 600 is inserted into the housing 100 and passes through the circular hole 405 of the clamp 400. The knob 406 is rotated to fix the outer sheath of the wire 600, and the copper core of the wire 600 is connected to the tail cavity of the terminal 500. Push the slider 302 fully in so that the terminal 500 contact 504 is inserted and fitted into the guide post 201. Tighten the top screw 301 of the ceramic sleeve 300 to lock the terminal 500 in place by pressing the spring 501 protrusion 502. The assembly is now complete. To disassemble, loosen the screw 301 in the reverse direction. The spring 501 will release, and the spring 402 inside the clamp 400 will automatically release the wire 600. Simply pull the slider 302 outward to separate the terminal 500 from the guide post 201. The entire terminal unit can be removed for inspection or replacement.

[0031] like Figure 12 As shown, in this embodiment, when an overload or short-circuit fault occurs in the line, the large fault current flows through the contact point between terminal 500 and guide post 201. High temperature rapidly accumulates at the contact point, and the heat is conducted to the fuse bracket 302c, causing the low-melting-point alloy bracket to melt and break, and the inner sleeve 302b loses its constraint. The waist-shaped groove 302a on the side wall of slider 302 does not restrict the displacement of the inner sleeve 302b. The spring 402 inside the clamp 400 pushes the limiting block 403 outward, causing slider 302, inner sleeve 302b, and terminal 500 to slide as a whole away from the energy meter 800. Terminal 500 contact 504 is forcibly separated from guide post 201, and the metering main circuit is completely disconnected. After the circuit is physically disconnected, the user's anti-compound switch cannot conduct the faulty line, preventing the generation of a high-temperature arc again and effectively avoiding the spread of electrical fire. The high-temperature resistant material of the ceramic sleeve 300 will not be ignited by the high temperature of the arc, protecting the energy meter 800 and the housing 100 from being burned. When troubleshooting, simply remove the damaged slider 302 assembly, replace it with a brand new slider 302 and terminal 500 assembly with a fuse bracket 302c, and reconnect the wiring to restore power. There is no need to replace the energy meter 800 and ceramic sleeve 300. The maintenance operation is simple and the cost is lower.

[0032] It is worth mentioning that the clamp plate 700 is equipped with a layered / slotted wiring structure that corresponds to each group of terminals. The multiple wires 600 that pass through the box 100 are placed in the corresponding slots of the clamp plate 700, so as to achieve partition isolation and neat arrangement of multiple cables and avoid the wires 600 of different phases from getting tangled and crossing.

[0033] The neatly arranged wires 600 can be precisely aligned with the round holes 405 of the clamp 400, making it convenient for construction personnel to thread and assemble the wires; at the same time, the gaps between the wires are conducive to ventilation and heat dissipation, and can also prevent the outer sheaths of the wires from rubbing against each other and causing damage, thus improving the neatness of the wiring and the safety of electrical use.

[0034] In addition, the clamping plate 700 provides positioning and support for the ceramic sleeve 300, limiting the displacement of the ceramic sleeve 300 when inserting or removing the slider 302, and ensuring stable alignment of the guide post 201 with the terminal 500 contact 504.

[0035] like Figures 1 to 12 As shown, in this embodiment, the device relies on the ceramic sleeve 300 base to achieve high-temperature insulation protection, and is equipped with a fuse bracket 302c and a spring 402 disengagement mechanism to achieve automatic power-off in case of fault. The terminal 500 adopts a modular plug-in structure with a slider 302, which is convenient for installation and maintenance. The clamp 400 and the terminal 500 form a double cable fixing structure, which ensures stable contact under high current conditions. The double-sided ventilation slots 103 of the box 100 provide continuous heat dissipation, and the magnetic box door 101 facilitates inspection. The mounting slot 300a and the partition slot 300b of the ceramic sleeve 300 achieve physical isolation of each phase line, which comprehensively improves the operational safety of the power metering box.

[0036] It is worth mentioning that existing direct-connection electricity meter terminals use a fixed integrated wiring structure. When the circuit experiences overload or short circuit, generating high temperatures, the insulation structure is easily damaged, allowing users to reverse the circuit breaker and continuously generate arcs, potentially causing a fire. Furthermore, the terminals and meter are not detachable, requiring disassembly of all wiring for installation, maintenance, and repair, making the process complex. Cables are only clamped and fixed at a single point, making them prone to loosening and overheating during use. The internal wiring of the enclosure lacks a neat structure, resulting in messy and poor heat dissipation. This invention combines a ceramic sleeve slotted base, an integrated slider plug-in unit, a fuse bracket linkage spring release mechanism, and a clamping plate that also functions as a cable organizer. This integrates multiple functions, including automatic power-off in case of fault, modular quick installation and disassembly, double cable locking, and neat internal wiring for heat dissipation. The various structures work together to form a complete electrical safety protection system. Specifically, such as Figure 1 , Figure 3 As shown, the clamp 700 is equipped with both a ceramic sleeve positioning slot and a cable routing area. The clamp 700 is a composite functional structure. The slot can hold the ceramic sleeve 300, limiting the offset and wobbling of the ceramic sleeve 300 when the slider 302 is inserted or removed, ensuring precise alignment of the contact point 504 between the guide post 201 and the terminal 500. The routing area can be divided to accommodate the wires 600, preventing cable tangling. One structure simultaneously achieves base fixation and cable organization, eliminating the need for additional cable routing brackets, simplifying the internal layout. It is a unique supporting structure of this invention. The reserved heat dissipation gaps between the partitioned cables can be used in conjunction with the ventilation structure to prevent heat accumulation.

[0037] Specifically, such as Figure 2 , Figure 4 As shown, the insulating plate 200 has multiple independent guide posts 201 embedded inside, pre-assembled on the bottom of the electricity meter 800. The guide posts 201 extend horizontally outward to form a male plug-in conductive structure. The insulating plate 200 separates the individual guide posts 201 from each other, integrating the meter's output conductive terminals into a single plug-in male connector, which can directly connect to the terminal 500 inside the slider 302, instead of the scattered and independent terminals on the meter body. The insulating plate 200 forms a phase-separated isolation structure on the meter side, corresponding to the slotted structure of the rear ceramic sleeve 300, forming a double-layer phase-to-phase isolation protection, which is significantly different from the traditional one-piece terminal block without separation in electricity meters.

[0038] Specifically, such as Figure 9 , Figure 11 As shown, the ceramic sleeve 300 has multiple independent mounting slots 300a, and a partition groove 300b is provided between adjacent mounting slots 300a. The top of the ceramic sleeve 300 is equipped with screws 301 corresponding to each mounting slot 300a. The mounting slots 300a provide independent assembly space for each set of sliders 302. The partition grooves 300b increase the spacing between the conductive components of each phase, which can block the cross-phase conduction of fault arc and reduce phase-to-phase short circuit faults. The screws 301 can press down on the protrusions 502 on the top of the terminal 500 to lock the terminal 500 and the slider 302. The side wall of the slider 302 has a waist-shaped groove 302a, which provides adjustment space for the screws 301 and does not restrict the pulling and pulling of the slider 302 after melting, realizing the coexistence of locking limit and modular disassembly and assembly functions.

[0039] Specifically, such as Figure 11 , Figure 12 As shown, the slider 302 is internally configured with a built-in sleeve 302b, a fuse bracket 302c, a heat insulation cavity 302e, and a limiting cavity 302f. A complete clamp 400 is assembled inside the limiting cavity 302f. The built-in sleeve 302b radially limits the terminal 500. The fuse bracket 302c is arranged around the built-in sleeve 302b. When the circuit fault causes a temperature rise, the fuse bracket 302c fails, and the spring 402 inside the clamp 400 pushes the limiting block 403 outward, causing the slider 302 to slide outward as a whole. The terminal 500 is forcibly separated from the guide post 201, physically cutting off the fault circuit. The heat insulation cavity 302e isolates the high temperature generated by the fuse, preventing heat damage to the rest of the slider 302 structure. The limiting cavity 302f individually constrains the clamp 400, limiting the clamp to only slide and extend along the wire threading direction, making the clamping and releasing of the cable stable and controllable. The fuse bracket 302c, spring 402, slider 302, and terminal 500 form an interlocking disconnection assembly. Unlike traditional terminals that lack an automatic circuit breaking structure, this assembly can physically block fault circuits and prevent users from blindly closing the circuit and causing a fire.

[0040] like Figure 7 , Figure 8 , Figure 12 As shown, the clamp 400 and the terminal 500 form a double cable locking structure. The wire 600 passes through the round hole 405 of the clamp 400. The outer sheath of the cable can be clamped by the rubber sheet 407 by rotating the knob 406. The copper core of the cable is accommodated at the tail of the terminal 500. The terminal 500 is locked by pressing down the spring 501 and the protrusion 502 of the screw 301. The double limiting structure can prevent the cable from being pulled or loosened by vibration, stabilize the conductive contact, and reduce the heat generation risk caused by poor contact. This is different from the traditional terminal that only clamps the cable at a single point.

[0041] The entire structure works together to form a complete safe working logic. The clamp plate 700 organizes the circuit and fixes the base. The insulation plate 200 and ceramic sleeve 300 provide double-layer phase isolation. The slider integrates a fuse linkage release mechanism to realize automatic power-off in case of failure. The clamp and terminal are matched with double locking cables. All the structures work together to solve many defects of traditional terminal blocks, such as easy fire, troublesome disassembly and assembly, easy loosening of cables, and messy wiring.

[0042] In this embodiment, the standard installation process for the entire machine is as follows: like Figure 1 , Figure 2 , Figure 4 , Figure 12 As shown, in this embodiment, the clamping plate 700 is first fixedly assembled to the bottom side inside the box 100, and the ceramic sleeve 300 is snapped into the positioning slot of the clamping plate 700 to complete the limiting support; the electricity meter 800 is pre-installed on the upper part of the box 100, and the insulating plate 200 with multiple guide posts 201 embedded in it is pre-assembled on the wiring terminal of the electricity meter 800 so that the guide posts 201 are horizontally facing the ceramic sleeve 300.

[0043] The clamp 400 is inserted into the limiting cavity 302f of the slider 302, and the terminal 500 is inserted into the inner sleeve 302b of the slider 302. The assembled slider 302 is then inserted laterally into the mounting slot 300a of the ceramic sleeve 300. The external wire 600 is inserted into the box through the bottom opening 104 of the box 100. The wire 600 is neatly arranged in sections with the help of the clamping plate 700. Each wire 600 passes through the round hole 405 of the clamp 404 of the clamp 400. The knob 406 is rotated to press the rubber sheet 407, which initially fixes the outer sheath of the wire 600. The copper core of the wire 600 extends into the hollow cavity at the tail of the terminal 500.

[0044] Push the slider 302 fully into the ceramic sleeve 300 so that the contact 504 on the end plate 503 at the front end of the terminal 500 is tightly inserted and connected to the guide post 201 on the side of the meter. Tighten the screw 301 on the top of the ceramic sleeve 300. The lower end of the screw 301 presses against the protrusion 502 on the surface of the spring 501, locking the terminal 500 and the slider 302. After all the wiring is assembled, close the box door 101 and fix it with the magnetic attraction of the magnet block 102 to complete the installation of the whole machine.

[0045] II. Normal Disassembly Procedure like Figure 3 , Figure 7 , Figure 12 As shown, in this embodiment, the door 101 of the housing 100 is opened, and the screws 301 on the top of the ceramic sleeve 300 are loosened in reverse order. The screws 301 release the downward pressure constraint on the protrusion 502 of the spring piece 501, and the spring piece 501 springs back to release the terminal 500. The spring 402 inside the clamp 400 continues to push the limiting block 403 outward, which drives the clamp 404 to release the rubber sheet 407 and release the clamp on the outer sheath of the wire 600.

[0046] Pull the slider 302 outward to separate the contact 504 of the terminal 500 from the guide post 201, and remove the slider 302 as a whole from the mounting groove 300a of the ceramic sleeve 300; loosen the knob 406 on the clamp 404 to pull the wire 600 out from the round hole 405 of the holder 400. The wires 600 neatly arranged on the clamp 700 can be separated individually. If the terminal base needs to be disassembled as a whole, simply remove the ceramic sleeve 300 from the slot of the clamp 700.

[0047] III. Replacement and Installation Procedure for Fuse Bracket 302c After Blown and Power Failed like Figure 6 , Figure 11 , Figure 12 As shown, in this embodiment, after the circuit is overloaded or short-circuited and generates high temperature, the fuse bracket 302c inside the slider 302 melts and breaks due to heat. The spring 402 automatically pushes the slider 302 to slide outward, and the terminal 500 is forcibly disconnected from the guide post 201, thus de-energizing the fault circuit.

[0048] During maintenance, open the box door 101, loosen the top screw 301 of the ceramic sleeve 300, pull out the damaged slider 302 assembly with the melted fuse bracket 302c, and remove the scrapped terminal 500 inside the assembly; take out a brand new slider 302 accessory with a complete built-in fuse bracket 302c, insert the intact terminal 500 into the inner sleeve 302b of the slider 302, and pre-install the clamp 400 in the limiting cavity 302f of the slider 302.

[0049] Straighten the existing wires 600 inside the box along the cable tray of the clamp plate 700, and re-pass them through the round hole 405 of the clamp 400. Rotate the knob 406 to clamp the outer sheath of the wires 600, and connect the copper core of the cable to the tail cavity of the terminal 500. Push the new slider 302 into the mounting slot 300a of the ceramic sleeve 300 so that the contact 504 is inserted into the guide post 201. Tighten the screw 301 to press the spring piece 501 protrusion 502 to complete the locking.

[0050] After confirming that all phase sequence lines are conductive and terminals are securely locked, close the box door 101, and the device resumes normal metering and power-on operation. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended technical solutions rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalent elements of the technical solutions are intended to be included within the present invention.

Claims

1. A pluggable meter connection terminal, characterized in that, It includes a guide post (201), a ceramic sleeve (300), and a clamp (400). One end of the guide post (201) is electrically connected to an electricity meter (800), and the other end of the guide post (201) is pluggably connected to one end of a terminal (500). The terminal (500) is sleeved in a slider (302), and the slider (302) is pluggably disposed in the ceramic sleeve (300). The clamp (400) is telescopically disposed on the ceramic sleeve (300).

2. The pluggable meter connection terminal as described in claim 1, characterized in that, The ceramic sleeve (300) has multiple mounting grooves (300a), and the ceramic sleeve (300) between adjacent mounting grooves (300a) has a partition groove (300b). The top of the ceramic sleeve (300) is threaded with a screw (301).

3. The pluggable meter connection terminal as described in claim 1, characterized in that, The guide post (201) is embedded in the insulating plate (200).

4. A pluggable meter connection terminal as described in claim 1, characterized in that, The slider (302) is provided with an inner sleeve (302b), and the slider (302) around the inner sleeve (302b) is provided with a fusible bracket (302c) at intervals. The slider (302) around the fusible bracket (302c) is provided with a heat insulation cavity (302e) and a limiting cavity (302f). The clamp (400) is disposed in the limiting cavity (302f).

5. A pluggable meter connection terminal as described in claim 4, characterized in that, The clamp (400) includes a fixing block (401), a spring (402), a limiting block (403), a clamp (404), a round hole (405), a knob (406), and a rubber sheet (407). The fixing block (401) is fixed in the limiting cavity (302f), and the limiting block (403) is slidably disposed in the limiting cavity (302f). A spring (402) is provided between the fixing block (401) and the limiting block (403).

6. A pluggable meter connection terminal as described in claim 5, characterized in that, The limiting block (403) is provided with a clamp (404), the clamp (404) has a round hole (405), a rubber sheet (407) is fitted inside the round hole (405), and the rubber sheet (407) is set on the clamp (404) by a knob (406).

7. A pluggable meter connection terminal as described in claim 4, characterized in that, The inner sleeve (302b) is provided with a terminal (500), and the end of the terminal (500) is provided with an end plate (503). The end plate (503) is provided with a contact (504), and the contact (504) is pluggably connected to the guide post (201).

8. A pluggable meter connection terminal as described in claim 7, characterized in that, The terminal (500) has a spring piece (501) on its top, and the spring piece (501) has a protrusion (502) that cooperates with the screw (301).

9. An electricity metering box, characterized in that, The electric meter (800) as described in claim 1 is provided inside the housing (100), and the insulating plate (200) on the electric meter (800), ceramic sleeve (300) and guide post (201) is also provided inside the housing (100) in conjunction with the ceramic sleeve (300).

10. An electricity metering box as described in claim 9, characterized in that, The box body (100) is provided with a door (101), and a magnet (102) is provided on the side of the box body (100) to magnetically attract the door (101). Ventilation slots (103) are symmetrically provided on the side of the box body (100). A fixing pad (105) is also provided on the box body (100). A bottom opening (104) is provided at the bottom of the box body (100).

Images