Security electric energy metering box

Abstract

The invention relates to the field of electric power facilities, in particular to a security electric energy metering box which comprises an electric meter box and an electric energy meter, the electric energy meter is arranged in the electric meter box, a plurality of cables connected with the electric energy meter are arranged in the electric meter box, and a plurality of groups of guide frames distributed corresponding to the cables are fixed in the electric meter box. The front sides of the multiple sets of guide frames are vertically and slidably provided with protective covers penetrating in and clamping cables, limiting rods extending transversely are fixed to the rear sides of the guide frames, swing arms are rotationally connected to the rear sides of the protective covers, and auxiliary grooves allowing the limiting rods to penetrate out transversely penetrate through the middle sections of the swing arms. By arranging the shield corresponding to the cable distribution, the shield clamps the cable through the built-in clamping sleeve, and after wiring is completed, the shield can move downwards along with the shield to automatically store the wiring terminal, so that the electrified end is completely hidden in the shield, the risk of mistakenly touching the wiring terminal of the cable is isolated, the use is safer, the cable is subjected to shunt constraint, and the wiring regularity is improved.

Description

Technical Field

[0001] This invention relates to the field of power facilities, and more specifically to a security power metering box. Background Technology

[0002] As a core device connecting power suppliers and consumers in a power system, the electricity metering box is widely used in various scenarios such as residential buildings, commercial buildings, and industrial plants. Its core function is to accurately measure electricity consumption through a built-in electricity meter, while providing a safe and reliable installation space for cable connections and equipment protection. Structurally, a traditional electricity metering box mainly consists of basic components such as a box body, a cover, an electricity meter mounting position, and cable perforations. The electricity metering box is a key structure for ensuring the safe and stable operation of the power system and reducing the risk of safety accidents.

[0003] Currently, the connection between the cables in the electricity meter box and the electricity meter terminals mostly relies on manual operation. During use, operators must first insert the cable tip into the electricity meter's wiring cavity, then manually maintain the height of the terminal while simultaneously tightening the screws. On one hand, the terminals are exposed for extended periods during wiring, especially in live-line work scenarios, where exposed metal terminals pose a risk of electric shock. On the other hand, maintaining stability during manual terminal positioning is difficult, easily leading to terminal misalignment, resulting in loose connections and increased contact resistance.

[0004] Specifically, whether it's meter installation and wiring work or subsequent maintenance, exposed live wiring terminals pose a significant safety hazard. Meter boxes are mostly mounted on walls, outdoors, and often installed at high locations. When workers operate within the confined space of the box, they are prone to accidentally touching the wiring terminals, which can lead to electric shocks, and subsequently, phase-to-phase or phase-to-ground short circuits.

[0005] In addition, the cables in traditional electricity metering boxes are mostly arranged freely, lacking branching guidance and constraint structures, resulting in multiple cables overlapping each other, which is inconvenient for subsequent inspection and maintenance. Summary of the Invention

[0006] The purpose of this invention is to provide a security power metering box to solve the above-mentioned problems. By setting up a protective cover for the corresponding cable distribution, the cover clamps the cable with a built-in clamping sleeve. After the wiring is completed, the cover can move down and automatically store the terminal block, so that the live end is completely hidden inside the cover. This isolates the risk of accidental contact with the cable terminal block, making it safer to use while also constraining the cable branching and improving the neatness of the wiring. See the following description for details.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a security power metering box, including a meter box and a power meter. The power meter is built into the meter box. The meter box is provided with several cables connected to the power meter. The meter box is fixed with several sets of guide frames corresponding to the distribution of the cables. Each set of guide frames has a protective cover that slides vertically on its front side to pass through and clamp the cables. A laterally extending limiting rod is fixed to the rear side of the guide frame. A swing arm is rotatably connected to the rear side of the protective cover. An auxiliary groove for accommodating the limiting rod is transversely passed through the middle section of the swing arm. A pre-tightening nut and a retaining washer are sleeved on the outer side of the swing arm between the limiting rod and the protective cover. The pre-tightening nut is located on the side of the retaining washer closer to the protective cover. A spring with its two ends respectively abutting against the pre-tightening nut and the retaining washer is sleeved on the outer side of the swing arm. The spring supports the retaining washer to abut against the outer side of the limiting rod, so that the swing arm is vertically abutted against the protective cover by pushing the pre-tightening nut with the spring.

[0008] When using the aforementioned security energy metering box, the protective cover is pre-moved downwards, and the cover slides downwards supported by the guide frame. At the same time, the swing arm rotatably connected to the rear of the cover rotates downwards synchronously under the support of the limit rod. That is, the swing arm moves downwards with the cover, and the hinge point between the swing arm and the cover moves downwards to below the limit rod. During this process, one end of the anti-reverse ring of the swing arm moves continuously downwards from above the limit rod to below the limit rod. The pre-tightening nut pushes the spring to compress and then release the elastic force. In other words, the cover is kept at the lowest or highest point of the guide groove by the spring pushing and resetting. When connecting the terminals of several cables to the terminals of the electricity meter in the meter box in sequence, first, push down the cover to keep it at the lowest point. At this time, one end of the anti-reverse ring of the swing arm is facing down. Pass the cable into the cover from bottom to top. Specifically, the cable passes through the clamping body composed of two sets of clamping sleeves at the same height until the top of the terminal is flush with the top opening of the cover and not exposed. At this time, turn the adjusting screw to reduce the distance between the movable pressure cap and the fixed pressure cap, thereby squeezing and expanding the clamping sleeve so that the cable can be pressed and positioned on both sides by several sets of clamping parts inside the cover, thus completing the connection action between the cable and the cover. When the terminal block needs to be extended upward into the wiring cavity of the energy meter, push the cover upward. The guide frame supports the cover and moves the cable upward. During this process, since the clamping sleeve is coaxially installed on the outside of the shaft, and the gear at the rear end of the shaft meshes with the rack of the guide frame, the gear drives the shaft to support the clamping sleeve to rotate synchronously during the upward movement of the cover. Thus, during the upward movement of the cable supported by the cover, the clamping sleeve synchronously supports the cable to extend out of the top opening of the cover, actively realizing the extension action of the terminal block from the top opening of the cover, assisting the terminal block to be inserted into the wiring cavity. At the same time, the spring pushes the upward tilting arm to keep the cover at the highest point of the guide rail, thereby keeping the cable height locked. In the subsequent process of connecting the terminal block to the terminal post, there is no need to manually maintain the height position of the terminal block, and the pre-positioning action of the cable is automatically completed. When it is necessary to separate the terminal block from the wiring cavity of the electricity meter, disconnect the terminal block from the terminal post, and then push the cover downward. The clamping sleeve clamps the cable and pulls it out of the wiring cavity. Similarly, the gear is meshed with the rack and pinion, which supports the clamping sleeves on both sides to rotate in opposite directions. As the cover moves downward, the top of the cable is automatically retracted into the cover until the terminal block is completely retracted into the top opening of the cover. At the same time, the cover moves down to the lowest point of the guide groove, the swing arm rotates to the downward position, and the spring pushes the swing arm to keep the cover in position, automatically hiding the live end of the cable.

[0009] Preferably, the compression stroke of the spring is greater than the distance between the rear side of the guard and the front side of the guide frame, and the retaining pad is clearance-fitted with the swing arm.

[0010] Preferably, the meter box includes a housing for accommodating the electricity meter and guide frame. The front of the housing is provided with an openable and closable cover. The bottom front of the electricity meter is provided with a wiring cavity for accommodating the end of the cable. Several terminals are provided in the wiring cavity corresponding to the cable.

[0011] Preferably, the top of the cable is fixed with a terminal block that is compatible with the terminal block, and the bottom of the wiring cavity is fixed with a guide plate that supports and separates the cable. The guide plate has a guide hole through which the cable passes. A crimping cover is provided on the bottom side of the energy meter below the wiring cavity. A rotating lug for rotating the energy meter is provided on the front side of the top of the crimping cover. The rear side of the crimping cover is connected to the energy meter by a latch. Several sets of constraint grooves for crimping the cable are provided on the rear edge of the crimping cover.

[0012] Preferably, the protective cover includes two sets of shells distributed front and rear. The protective cover is provided with multiple sets of clamping members. Each clamping member includes two horizontally parallel shafts that extend longitudinally through the rear wall of the shell. Fixed pressure caps and movable pressure caps are symmetrically installed on the outer side of the middle section of each shaft. The fixed pressure caps are integrally formed with the shafts, and the movable pressure caps are clearance-fitted with the shafts. A clamping sleeve is provided between the fixed pressure caps and the movable pressure caps. The clamping sleeve is a flexible sleeve.

[0013] Preferably, two clamping sleeves of the same set of clamping components cooperate to form a clamping body that clamps the cable to both sides, and the front end of the shaft is threaded with an adjusting screw that abuts against the movable pressure cap. Rotating the adjusting screw changes the distance between the movable pressure cap and the fixed pressure cap, and the clamping sleeve is stretched outward to clamp and position the cable.

[0014] Preferably, the guide frame has a vertically extending guide groove running through its middle section, the rear side of the housing has a guide slider that slides vertically into the guide groove, the rear end of the shaft has a gear that extends into the guide groove, and the rear sides of the guide groove have a pair of racks that mesh with two gears on the same set of clamping members.

[0015] Preferably, the front side of the housing has a longitudinally penetrating adjustment hole that exposes the front end of the adjustment screw, and the rear side of the housing is fixed with a rotating seat that rotatably connects to the swing arm. At the junction of the two sets of housings, screw cylinders through which the mounting screws are inserted are provided.

[0016] Preferably, the guide slider has a through-hole for screws to fix the connection to the housing, and the guide frame is a C-shaped frame structure with the opening facing backward. The four corners of both ends of the guide frame are provided with mounting bases corresponding to the meter box.

[0017] Preferably, the swing arm is a rectangular frame-shaped bent rod structure, with both ends of the swing arm passing through the rotating seat and each fixed with a backstop ring, and the limiting rod having detachable nuts pressed on both sides of the guide frame.

[0018] The beneficial effects are as follows: 1. By setting up a protective cover for the corresponding cable distribution, the cover clamps the cable with a built-in clamping sleeve. After the wiring is completed, the cover can move down and automatically store the terminal block, so that the live end is completely hidden inside the cover, thereby isolating the risk of accidental contact with the cable terminal block and making it safer to use.

[0019] 2. The swing arm and spring rotate synchronously under the support of the limit rod. The swing arm supports the cover, so that the cover can be stably locked at the highest or lowest point of the guide slide. When wiring, there is no need to manually maintain the height of the terminal block. This enables the cable to be quickly pre-positioned and supported on the bottom side of the power meter, reducing the labor intensity of the operators.

[0020] 3. When the protective cover is pushed up, the gear at the end of the shaft meshes with the rack of the guide frame, causing the clamping sleeve to rotate synchronously. This can actively push the terminal block out of the top opening of the protective cover and accurately insert it into the wiring cavity. When disassembling, the reverse action will automatically retract the terminal block, thereby shortening the safe handling time of the terminal block during wiring and maintenance, and adapting to safe operation in multi-cable scenarios.

[0021] 4. By sliding the guide rails of the guide frame with the corresponding multiple protective covers, multiple cables can be arranged in separate routes, avoiding tangling and crossing of cables during installation and disassembly, thus improving the standardization of wiring.

[0022] 5. By adjusting the screw, the distance between the movable pressure cap and the fixed pressure cap can be flexibly changed, thereby adjusting the expansion degree of the clamping sleeve. This can not only achieve a firm clamping of cables of different thicknesses, but also avoid damage to the cable insulation layer due to excessive clamping force.

[0023] 6. During wiring and maintenance, the terminals are only exposed when inserted into the electricity meter; otherwise, they are hidden inside the protective cover or wiring cavity to reduce the exposure time of live terminals and lower the risk of electric shock to workers. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a three-dimensional structural breakdown diagram of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the energy meter of the present invention; Figure 5 This is a three-dimensional structural disassembly diagram of the energy meter of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the protective cover of the present invention; Figure 7 This is a structural breakdown diagram of the protective cover of the present invention; Figure 8 This is a rear view structural diagram of the protective cover of the present invention; Figure 9 This is a three-dimensional structural diagram of the protective cover of the present invention from another direction; Figure 10This is a structural disassembly diagram of the protective cover and guide frame of the present invention; Figure 11 This is a three-dimensional structural schematic diagram of the guide frame of the present invention; Figure 12 This is a schematic diagram showing the internal structure of the protective cover of the present invention. Figure 13 This is a three-dimensional structural diagram of the housing of the present invention; Figure 14 This is a partial structural breakdown diagram of the swing arm of the present invention; Figure 15 This is a three-dimensional structural schematic diagram of the shaft of the present invention; Figure 16 This is a three-dimensional structural disassembled diagram of the shaft of the present invention; Figure 17 This is a front view structural diagram of the meter box in the closed state of the present invention; Figure 18 This is a three-dimensional structural diagram of the meter box of the present invention in the closed state.

[0026] The annotations in the attached figures are explained as follows: 1. Meter box; 101. Box body; 102. Box cover; 2. Electricity meter; 201. Wiring cavity; 202. Terminal; 203. Guide plate; 204. Guide hole; 205. Crimp cover; 205a. Rotating ear; 206. Constraint groove; 3. Protective cover; 301. Housing; 301a. Adjustment hole; 301b. Rotating seat; 301c. Screw sleeve; 302. Guide slider; 302a. Countersunk hole; 303. Shaft; 304. Fixed pressure cap; 305. Movable pressure cap; 306. Clamping sleeve; 307. Adjusting screw; 308. Gear; 4. Cable; 401. Terminal block; 5. Guide frame; 501. Guide groove; 502. Rack; 503. Mounting base; 6. Swing arm; 601. Auxiliary groove; 602. Preload nut; 603. Spring; 604. Retaining washer; 605. Anti-reverse ring; 7. Limiting rod; 701. Removal nut. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] See Figures 1-18 As shown, the present invention provides a security power metering box, including a meter box 1 and a power meter 2. The power meter 2 is built into the meter box 1. The meter box 1 is provided with several cables 4 connected to the power meter 2. The meter box 1 is fixed with several sets of guide frames 5 corresponding to the distribution of the cables 4. Each set of guide frames 5 has a protective cover 3 that slides vertically on its front side to pass through and clamp the cables 4. Thus, through the sliding cooperation between the protective cover 3 and the guide frame 5, the cables 4 can be raised and lowered synchronously with the protective cover 3. This can actively push the terminal 401 at the top of the cable 4 to connect to the power meter 2 during wiring, and can also store the live end of the cable 4 after wiring is completed, forming full protection for the cable 4 and avoiding loosening of the wiring caused by external pulling. A laterally extending limiting rod 7 is fixed to the rear side of the guide frame 5. A swing arm 6 is rotatably connected to the rear side of the protective cover 3. An auxiliary groove 601 for accommodating the limiting rod 7 is transversely passed through the middle section of the swing arm 6. A pre-tightening nut 602 and a retaining washer 604 are sleeved on the outer side of the swing arm 6 between the limiting rod 7 and the protective cover 3. The pre-tightening nut 602 is located on the side of the retaining washer 604 closer to the protective cover 3. A spring 603 is sleeved on the outer side of the swing arm 6, with its two ends respectively abutting against the pre-tightening nut 602 and the retaining washer 604. Spring 603 supports and holds the retaining pad 604 against the outside of the limiting rod 7, so that the spring 603 pushes the pre-tightening nut 602 to support the swing arm 6 to vertically press against the protective cover 3. In this way, the elastic pre-tightening force of spring 603 realizes the elastic support of the swing arm 6 on the protective cover 3, so that the protective cover 3 can be stably locked on the front side of the guide frame 5. When wiring, it can be fixed at the highest point, and the docking position of the terminal 401 can be maintained without manual lifting of the cable 4, improving the convenience and stability of the wiring operation.

[0032] As an optional implementation, the compression stroke of spring 603 is greater than the distance between the rear side of the guard 3 and the front side of the guide frame 5. This ensures that when the guard 3 slides on the guide frame 5, spring 603 is always in an effective compressed state, which can continuously provide a stable preload force. This avoids the guard 3 from becoming loose due to insufficient compression of spring 603. At the same time, sufficient stroke redundancy is reserved to adapt to the compression requirements during the up and down sliding process of guard 3. This maintains the clearance fit between shim 604 and swing arm 6. With this setting, by maintaining the non-fixed connection between shim 604 and swing arm 6, shim 604 is allowed to slide on swing arm 6 with the extension and retraction of spring 603. This ensures that shim 604 is always in close contact with the outer side of limit rod 7, avoiding the failure of preload force due to force deviation, thereby improving the reliability of guard 3 positioning. The meter box 1 includes a box body 101 that houses and installs an electricity meter 2 and a guide frame 5. The front of the box body 101 is equipped with a box cover 102 that can be opened and closed. The bottom front of the electricity meter 2 is provided with a wiring cavity 201 for the top of the cable 4 to be inserted. Several terminals 202 are provided in the wiring cavity 201 corresponding to the cable 4. This arrangement can achieve basic protection through the closed structure of the box body 101 and the box cover 102, preventing dust, moisture and foreign objects from entering the core components inside the box. Moreover, the corresponding distribution of the wiring cavity 201 and the terminals 202 can realize the connection between the cable 4 and the electricity meter 2, avoiding the risk of misalignment and short circuit when multiple cables 4 are connected, and improving the standardization and safety of wiring. A terminal block 401 with a matching terminal block 202 is fixed to the top of the cable 4. A guide plate 203 supporting and separating the cable 4 is fixed to the bottom side of the wiring cavity 201. The guide plate 203 has a guide hole 204 through which the cable 4 passes. A crimp cover 205 is provided on the bottom side of the energy meter 2 below the wiring cavity 201. A rotating lug 205a for rotating the energy meter 2 is provided on the front side of the top of the crimp cover 205. The rear side of the crimp cover 205 is connected to the energy meter 2 by a latch, which facilitates the opening and closing of the crimp cover 205. After wiring is completed, it can be quickly locked and fixed without complicated tools. The rear edge of the crimping cover 205 is provided with several sets of constraint grooves 206 for clamping the cable 4, which are used to limit and fix the middle section of the cable 4 to prevent the cable 4 from shifting due to vibration and pulling. With this setting, the guide holes 204 of the guide plate 203 can realize the branching and separation of multiple cables 4. With the clamping effect of the constraint grooves 206, the cables 4 are effectively prevented from tangling with each other, while improving the regularity of the cable 4 arrangement and facilitating later inspection and maintenance. The protective cover 3 includes two sets of housings 301 distributed front and rear. The protective cover 3 is equipped with multiple sets of clamping components. The clamping components include two horizontally parallel shafts 303 that extend longitudinally through the rear wall of the housings 301. Fixed pressure caps 304 and movable pressure caps 305 are symmetrically installed on the outer side of the middle section of the shafts 303. The fixed pressure caps 304 are integrally formed with the shafts 303, and the movable pressure caps 305 are clearance-fitted with the shafts 303 to ensure that the movable pressure caps 305 can move flexibly along the axial direction of the shafts 303, providing space for the expansion and contraction adjustment of the clamping sleeves 306. A clamping sleeve 306 is sleeved between the fixed pressure caps 304 and the movable pressure caps 305. The clamping sleeve 306 is a flexible sleeve. This design facilitates the adaptation to the clamping requirements of cables 4 with different wire diameters through the deformation of the flexible material, while avoiding damage to the insulation layer of the cable 4 by rigid clamping, thus improving the safety of the clamping process. Two clamping sleeves 306 of the same set of clamping components cooperate to form a clamping body that clamps the cable 4 to both sides. The front end of the shaft 303 is threaded with an adjusting screw 307 that abuts against the movable pressure cap 305. Rotating the adjusting screw 307 changes the distance between the movable pressure cap 305 and the fixed pressure cap 304, which pushes the clamping sleeve 306 outward to clamp and position the cable 4. This serves as an adjustment structure for fixing the cable 4. The clamping force can be adjusted by adjusting the adjusting screw 307. This ensures that the cable 4 is clamped firmly and allows for flexible adjustment of the expansion degree of the clamping sleeve 306 according to the thickness of the cable 4, adapting to the installation requirements of different specifications of cables 4 and improving the compatibility of the equipment. The guide frame 5 has a vertically extending guide groove 501 running through its middle. A guide slider 302 that slides vertically into the guide groove 501 is fixed to the rear side of the housing 301. A gear 308 that extends into the guide groove 501 is fixed to the rear end of the shaft 303. A pair of racks 502 that mesh with the two gears 308 on the same set of clamping parts are provided on both sides of the rear side of the guide groove 501. This serves as a synchronous transmission structure between the cover 3 and the guide frame 5. When the cover 3 moves up and down along the guide groove 501, the gears 308 and racks 502 mesh to drive the shaft 303 to rotate synchronously, thereby driving the clamping sleeve 306 to rotate. This enables the active extension and retraction of the terminal 401 without the need for manual adjustment of the cable 4 position, thus improving the efficiency of wiring and disassembly. The front side of the housing 301 has a longitudinally penetrating adjustment hole 301a that exposes the front end of the adjustment screw 307, allowing operators to directly operate the adjustment screw 307 from outside the protective cover 3. This allows for the clamping or loosening of the cable 4 without disassembling the protective cover 3, simplifying the operation process. The rear side of the housing 301 is fixed with a rotating seat 301b that rotatably connects to the swing arm 6. At the junction of the two sets of housings 301, corresponding screw cylinders 301c for inserting mounting screws are provided. The swing arm 6 is a rectangular frame-shaped bent rod structure, with both ends of the swing arm 6 extending out of the rotating seat. Each of the 301b components is fixed with a retaining ring 605 to limit the displacement of the swing arm 6 within the rotating seat 301b, preventing the swing arm 6 from coming out of the rotating seat 301b and ensuring a stable connection between the swing arm 6 and the protective cover 3. At the same time, it ensures the stable transmission of the spring force of the spring 603. The limit rod 7 is pressed with detachable nuts 701 on both sides at the point where it passes through the guide frame 5, thereby realizing the detachable fixing of the limit rod 7 and the guide frame 5. This facilitates the later inspection and replacement of components such as the swing arm 6 and the spring 603, improving the ease of equipment maintenance.

[0033] The guide slider 302 has a through-hole 302a for screws to fix and connect the housing 301. The guide frame 5 is a C-shaped frame structure with the opening facing backward. The four corners of both ends of the guide frame 5 are provided with mounting seats 503 corresponding to the meter box 1. As a fixed connection structure between the guide frame 5 and the meter box 1, the guide frame 5 can be stably installed in the corresponding position inside the box 101 through the mounting seats 503. At the same time, the guide frame 5 also provides a structural basis for the meshing transmission of the gear 308 and the rack 502, ensuring smooth and reliable transmission.

[0034] With the above structure, when in use, the protective cover 3 is pre-pushed downward, and the protective cover 3 slides downward supported by the guide frame 5. At the same time, the swing arm 6 rotatably connected to the rear side of the protective cover 3 rotates downward synchronously under the support of the limit rod 7. That is, the swing arm 6 moves downward with the protective cover 3, and the hinge point between the swing arm 6 and the protective cover 3 moves downward to below the limit rod 7. During this process, one end of the anti-reverse ring 605 of the swing arm 6 moves continuously downward from above the limit rod 7 to below the limit rod 7. The pre-tightening nut 602 pushes the spring 603 to first compress and then release the elastic force. That is to say, the protective cover 3 is kept at the lowest or highest point of the guide groove 501 by the spring 603 pushing and resetting. When it is necessary to connect the terminals 401 of several cables 4 to the terminals 202 of the electricity meter 2 in the meter box 1 in sequence, first, push down the cover 3 to keep it at the lowest point. At this time, one end of the anti-reverse ring 605 of the swing arm 6 is in a downward state. Pass the cable 4 into the cover 3 from bottom to top. Specifically, the cable 4 passes through the clamping body composed of two sets of clamping sleeves 306 at the same height until the top of the terminal 401 is flush with the top opening of the cover 3 and not exposed. At this time, rotate the adjusting screw 307 to reduce the distance between the movable pressure cap 305 and the fixed pressure cap 304, thereby squeezing and expanding the clamping sleeve 306 so that the cable 4 can be pressed and positioned on both sides through several sets of clamping parts inside the cover 3, thus completing the connection action between the cable 4 and the cover 3. When the terminal 401 needs to be extended upward into the wiring cavity 201 of the energy meter 2, the protective cover 3 is pushed upward. The guide frame 5 supports the protective cover 3, causing the cable 4 to move upward. During this process, since the clamping sleeve 306 is coaxially mounted outside the shaft 303, and the gear 308 at the rear end of the shaft 303 meshes with the rack 502 of the guide frame 5, the gear 308 drives the shaft 303 to support the clamping sleeve 306 to rotate synchronously during the upward movement of the protective cover 3. Thus, during the upward movement of the cable 4 supported by the protective cover 3, the clamping sleeve 306... The synchronous support cable 4 extends out of the top opening of the cover 3, actively realizing the extension action of the terminal 401 from the top opening of the cover 3, and assisting the terminal 401 to correspondingly insert into the wiring cavity 201. At the same time, the spring 603 pushes the swing arm 6, which is in an upward tilted state, to keep the cover 3 at the highest point of the guide rail, thereby keeping the height position of the cable 4 locked. In the subsequent process of connecting the terminal 401 to the terminal 202, there is no need to manually maintain the height position of the terminal 401, and the pre-positioning action of the cable 4 is automatically completed. When it is necessary to separate the terminal 401 from the wiring cavity 201 of the electricity meter 2, the connection between the terminal 401 and the terminal 202 is released. Then, the cover 3 is pushed down, and the clamping sleeve 306 clamps the cable 4 and pulls it out of the wiring cavity 201. Similarly, the gear 308 is engaged by the rack 502, which supports the clamping sleeves 306 on both sides to rotate in opposite directions. As the cover 3 moves down, the top of the cable 4 is automatically retracted into the cover 3 until the terminal 401 is completely retracted into the top opening of the cover 3. At the same time, the cover 3 moves down to the lowest point of the guide groove 501, and the swing arm 6 rotates to the downward position. The spring 603 pushes the swing arm 6 to keep the cover 3 in position and automatically hides the live end of the cable 4.

[0035] By setting up protective covers 3 corresponding to the distribution of cables 4, the protective covers 3 clamp the cables 4 with built-in clamping sleeves 306. After the wiring is completed, the protective covers 3 can move down and automatically store the terminals 401, so that the live end is completely hidden inside the protective covers 3, thereby isolating the risk of accidental contact with the terminals 401 of the cables 4, making it safer to use.

[0036] With the swing arm 6 and spring 603 rotating synchronously under the support of the limit rod 7, the swing arm 6 tightens the cover 3, so that the cover 3 can be stably locked at the highest or lowest point of the guide slide 501. When wiring, there is no need to manually maintain the height of the terminal 401, so that the cable 4 can be quickly pre-positioned and supported on the bottom side of the energy meter 2, reducing the labor intensity of the operators.

[0037] When the protective cover 3 is pushed upward, the gear 308 at the end of the shaft 303 meshes with the rack 502 of the guide frame 5, causing the clamping sleeve 306 to rotate synchronously. This can actively push the terminal 401 out of the top opening of the protective cover 3 and accurately insert it into the wiring cavity 201. When disassembling, the reverse action will automatically retract the terminal 401, thereby shortening the safe handling time of the terminal 401 during wiring and maintenance, and adapting to safe operation in multi-cable scenarios.

[0038] By sliding the guide groove 501 of the guide frame 5 with the corresponding multiple protective covers 3, the multiple cables 4 can be arranged in separate routes. During installation and disassembly, the cables 4 are prevented from getting tangled and crossing, which can improve the standardization of wiring.

[0039] By adjusting the screw 307, the movable pressure cap 305 can be pushed closer to or further away from the fixed pressure cap 304, thus flexibly changing the distance between the two and adjusting the expansion degree of the clamping sleeve 306. This can achieve a firm clamping of cables 4 of different thicknesses while avoiding damage to the insulation layer of the cable 4 due to excessive clamping force.

[0040] During wiring and maintenance, the terminal 401 is only exposed when it is inserted into the electricity meter 2. During the rest of the process, it is hidden in the protective cover 3 or the wiring cavity 201, which reduces the exposure time of the live end and reduces the risk of electric shock to the workers.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A security power metering box, comprising a meter box (1) and a power meter (2), wherein the power meter (2) is built into the meter box (1), and the meter box (1) is provided with a plurality of cables (4) for connecting the power meter (2), characterized in that: The meter box (1) is fixed with several sets of guide frames (5) corresponding to the distribution of cables (4), and the front side of several sets of guide frames (5) is vertically slidably provided with a protective cover (3) that passes through and clamps the cables (4). The guide frame (5) is fixed with a horizontally extending limiting rod (7) on the rear side. The protective cover (3) is rotatably connected to a swing arm (6). The middle section of the swing arm (6) has an auxiliary groove (601) that accommodates the limiting rod (7) passing through. The swing arm (6) between the limiting rod (7) and the protective cover (3) is fitted with a pre-tightening nut (602) and a retaining washer (604). The pre-tightening nut (602) is located on the side of the retaining washer (604) close to the protective cover (3). The swing arm (6) is fitted with a spring (603) with both ends abutting against the pre-tightening nut (602) and the retaining washer (604) respectively. The spring (603) supports the retaining washer (604) to abut against the outside of the limiting rod (7) so that the spring (603) pushes the pre-tightening nut (602) to support the swing arm (6) to vertically abut against the protective cover (3).

2. The security energy metering box according to claim 1, characterized in that: The compression stroke of the spring (603) is greater than the distance between the rear side of the guard (3) and the front side of the guide frame (5), and the retaining pad (604) is clearance-fitted with the swing arm (6).

3. The security power metering box according to claim 1, characterized in that: The meter box (1) includes a box body (101) for accommodating and installing an electricity meter (2) and a guide frame (5). The front side of the box body (101) is provided with a box cover (102) that can be opened and closed. The bottom front side of the electricity meter (2) is provided with a wiring cavity (201) for accommodating the top end of the cable (4). Several terminals (202) are provided in the wiring cavity (201) corresponding to the cable (4).

4. The security energy metering box according to claim 3, characterized in that: The top of the cable (4) is fixed with a terminal (401) that is adapted to the terminal (202). The bottom of the wiring cavity (201) is fixed with a guide plate (203) that supports and separates the cable (4). The guide plate (203) has a guide hole (204) through which the cable (4) passes. The bottom of the energy meter (2) below the wiring cavity (201) is provided with a crimping cover (205). The front top of the crimping cover (205) is provided with a rotating ear (205a) that is rotatably connected to the energy meter (2). The rear side of the crimping cover (205) is connected to the energy meter (2) by a latch. The rear edge of the crimping cover (205) is provided with several sets of constraint grooves (206) for crimping the cable (4).

5. A security energy metering box according to claim 1, characterized in that: The protective cover (3) includes two sets of shells (301) distributed front and back. The protective cover (3) is provided with multiple sets of clamping members. The clamping members include two horizontally parallel shafts (303) that extend longitudinally through the rear wall of the shell (301). The shafts (303) are symmetrically mounted with fixed pressure caps (304) and movable pressure caps (305) on the outer side of the middle section. The fixed pressure caps (304) are integrally formed with the shafts (303). The movable pressure caps (305) are clearance-fitted with the shafts (303). A clamping sleeve (306) is sleeved between the fixed pressure caps (304) and the movable pressure caps (305). The clamping sleeve (306) is a flexible sleeve.

6. The security energy metering box according to claim 5, characterized in that: Two clamping sleeves (306) of the same set of clamping parts cooperate to form a clamping body that clamps the cable (4) on both sides. The front end of the shaft (303) is threaded with an adjusting screw (307) that abuts against the movable pressure cap (305). Rotating the adjusting screw (307) changes the distance between the movable pressure cap (305) and the fixed pressure cap (304), and the clamping sleeve (306) is stretched outward to clamp the positioning cable (4).

7. A security energy metering box according to claim 6, characterized in that: The guide frame (5) has a vertically extending guide groove (501) running through its middle. The rear side of the housing (301) is fixed with a guide slider (302) that slides vertically into the guide groove (501). The rear end of the shaft (303) is fixed with a gear (308) that extends into the guide groove (501). The rear sides of the guide groove (501) are provided with a pair of racks (502) that mesh with two gears (308) on the same set of clamping parts.

8. A security power metering box according to claim 7, characterized in that: The front side of the housing (301) has an adjustment hole (301a) that exposes the front end of the adjustment screw (307) and a rotating seat (301b) that rotatably connects to the swing arm (6) is fixed on the rear side of the housing (301). At the junction of the two sets of housings (301), screw cylinders (301c) through which the installation screws are inserted are provided.

9. A security power metering box according to claim 7, characterized in that: The guide slider (302) has a countersunk hole (302a) through which screws are inserted to fix the housing (301). The guide frame (5) is a C-shaped frame structure with the opening facing backward. The four corners of both ends of the guide frame (5) are provided with mounting bases (503) corresponding to the meter box (1).

10. A security energy metering box according to claim 8, characterized in that: The swing arm (6) is a rectangular frame-shaped bent rod structure. Both ends of the swing arm (6) pass through the rotating seat (301b) and are fixed with anti-reverse rings (605). The limiting rod (7) passes through the guide frame (5) and is pressed with detachable nuts (701) on both sides.

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