Electric energy metering box cable limiting and fixing device and fixing method thereof

Abstract

The present application relates to cable position fixing technical field, disclose electric energy metering box cable position fixing device and its fixing method, including the cable body is positioned to clamp wire, and the arc slide and the arc slide groove rear side wall are fixedly connected with the pressure spring arranged in the left and right sides of the gas storage bag, the other side of the arc plate is uniformly provided with the hollow elastic clamping sleeve, and each group hollow elastic clamping sleeve is communicated through gas guide pipe and gas storage bag, the compression effect of the arc plate sliding on the gas storage bag is utilized, mechanical energy is converted into gas pressure energy, the hollow elastic clamping sleeve expands, can automatically adapt to different diameter cable, the flexible plate and the variable curvature arc surface cooperation structure are designed, the clamping force gradually increases with the rotation angle of support rod, sudden impact of clamping force is avoided, meanwhile, the size change of cable due to temperature change can be automatically compensated, the constant of clamping force is kept, and the cable can be firmly fixed.

Description

Technical Field

[0001] This invention relates to the field of cable limiting and fixing technology, and in particular to a cable limiting and fixing device and fixing method for an electricity metering box. Background Technology

[0002] An electricity metering box is a device used to measure electricity consumption. It can monitor and record parameters such as current, voltage, and power, and calculate electricity costs according to the set billing method. The internal wiring of the electricity metering box is numerous, and it is common to not be able to find the corresponding line. Therefore, a wiring fixing structure is added inside the transformer box to organize the wiring and avoid cable tangling.

[0003] A line fixing structure for an electricity metering box, with application number CN202323203911.8, is disclosed. The first movable slot is movably connected to a plurality of fixing blocks. Both the upper and lower ends of the fixing blocks are fixedly connected to limit plates. The middle of the rear end of the upper limit plate is threadedly connected to a first fastener. The fixing block is provided with a clamping plate. Both the left and right ends of the front side of the clamping plate are fixedly connected to limit rods. The front ends of the limit rods are respectively slidably connected to the front side of the fixing block.

[0004] However, in actual use, existing cable clamping structures are mostly single-point or single-sided clamping, resulting in uneven clamping force distribution. Cables are prone to axial sliding or radial displacement due to gravity, vibration, or temperature changes. After long-term use, this can easily lead to loose terminals, affecting the accuracy of power metering, and even causing safety accidents such as short circuits and fires. Moreover, the clamping surface is mostly a rigid structure with a small contact area with the cable and a large pressure per unit area, which can easily cut or crush the cable insulation layer and reduce the service life of the cable.

[0005] Therefore, this invention proposes a cable limiting and fixing device and a fixing method for an electricity metering box to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a cable limiting and fixing device and a fixing method for an electricity metering box, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cable limiting and fixing device for an electricity metering box, comprising a cable clamp for limiting the cable body, each set of cable clamps comprising a limiting seat, wherein a first fixing unit and a second fixing unit are symmetrically arranged on the limiting seat and facing away from each other, and the first fixing unit and the second fixing unit are pulled together by an elastic band. The first fixing unit includes a hinge rod connected by a torsion spring. The other end of the hinge rod is movably connected to an arc-shaped mounting plate. An arc-shaped plate is slidably mounted on the inner side of the arc-shaped mounting plate. An arc-shaped groove is opened on the inner side of the arc-shaped mounting plate. An arc-shaped slide bar that slides inside the arc-shaped groove is fixed on the outer side of the arc-shaped plate. A gas storage bag is fixedly connected between the arc-shaped slide bar and the rear side wall of the arc-shaped groove. Pressure-bearing springs arranged on the left and right sides of the gas storage bag are fixedly connected between the arc-shaped slide bar and the rear side wall of the arc-shaped groove. Hollow elastic clamping sleeves are uniformly fixed on the other side of the arc-shaped plate. Each set of hollow elastic clamping sleeves is connected to the gas storage bag through a gas guide pipe.

[0008] Preferably, the outer end of the limiting seat is integrally formed with an arc-shaped seat, and a wire-clamping groove is formed on the arc-shaped seat. The cable body is clamped in the wire-clamping groove. A pressure seat is fixed at the middle position of the top of the limiting seat, and the wire-clamping groove and the top of the limiting seat are arc-shaped transitions.

[0009] Preferably, the hinge rod includes a lower hinge seat fixed to the top of the pressure seat, the lower hinge seat is connected to a support rod by a torsion spring, and the other end of the support rod is fixed to an upper hinge seat. The arc-shaped mounting plate is hinged to the upper hinge seat by a pin, and a limiting strip is fixed on the upper hinge seat to limit the arc-shaped mounting plate.

[0010] Preferably, the first fixing unit and the second fixing unit have the same structure, and the pressure seat has a guide hole that matches the elastic band, and the elastic band passes through the guide hole and is fixed to the bottom of the support rod.

[0011] Preferably, a flexible plate is fixedly connected to one end of the arc-shaped mounting plate near the pressure seat, the outer wall of the pressure seat is set as an arc-shaped surface, the flexible plate is an arc-shaped baffle, and the bottom end of the flexible plate abuts against the arc-shaped surface.

[0012] Preferably, the height of the arc-shaped seat is the same as the radius of the wire clamping groove, and the arc-shaped seat corresponds to the hollow elastic clamping sleeve.

[0013] Preferably, the hollow elastic clamping sleeves are evenly arranged in four groups along the arc direction of the arc plate, and each group of hollow elastic clamping sleeves is a rubber air bag with a serrated clamping pad bonded to its surface.

[0014] Preferably, the wire clamp is fixedly installed on the inner wall of the metering box, and the metering box contains at least one set of electricity meters. The wire clamp is located below the electricity meters, and the cable body is snapped into the wire clamp and then fixedly installed on the electricity meters.

[0015] This invention provides a method for limiting and fixing cables in an electricity metering box. The steps of the fixing method are as follows: S1: Based on the actual installation position of the electricity meter inside the metering box, mark the installation hole position of the wire clamp on the inner wall of the metering box, so that the axis of the wire clamp groove of the wire clamp is in the same vertical plane as the axis of the corresponding terminal of the electricity meter, and ensure that the limit seat is installed firmly without shaking. Then, the cable to be connected to the electricity meter is introduced into the box from the inlet at the bottom of the metering box. The cable is straightened and the middle part of the cable is gently clamped into the wire clamp groove of the limit seat. The front and back position of the cable is adjusted so that the end has sufficient wiring length and the end is aligned with the terminal of the electricity meter. S2: Hold the upper ends of the support rods of the first and second fixed units with both hands respectively, and simultaneously apply force evenly to the left and right sides to overcome the initial torque of the torsion spring and the pulling effect of the elastic band, so that the two support rods rotate outward around their respective lower hinge seats, driving the arc-shaped mounting plate and arc plate away from the cable body, until there is an operating gap of 5-10mm between the hollow elastic clamping sleeves of the two fixed units and the cable body. S3: Slowly release both hands. Under the combined action of the initial torque of the torsion spring and the elastic restoring force of the elastic band, the two support rods rotate synchronously towards the middle cable body, causing the arc-shaped mounting plate and arc plate to move closer to the cable body. When the serrated clamping pad on the surface of the hollow elastic clamping sleeve contacts the surface of the cable body, the continued rotation of the support rod will cause the hollow elastic clamping sleeve on the arc plate to be subjected to the reaction force of the cable body, causing the hollow elastic clamping sleeve to undergo compression deformation, which increases the air pressure inside the air storage bag and the hollow elastic clamping sleeve, thereby increasing the contact area and clamping force with the cable body. S4: During the clamping process, the flexible plate slides along the variable curvature arc surface of the pressure seat and generates gradually increasing elastic bending deformation, providing additional progressive clamping thrust, and finally firmly clamping the cable body between the arc surface of the cable slot and the hollow elastic clamping sleeves of the two fixing units.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention employs a first and second fixing unit arranged symmetrically and facing away from each other. The two fixing units are pulled together by an elastic band that passes through the pressure seat, achieving synchronous movement and bidirectional clamping. This ensures uniform distribution of clamping force on both sides of the cable, solving the cable offset problem caused by unilateral clamping. The air storage bag and the hollow elastic clamping sleeve are connected through an air guide pipe. The compression effect of the arc-shaped plate on the air storage bag during sliding converts mechanical energy into gas pressure energy, causing the hollow elastic clamping sleeve to expand. This achieves adaptive amplification of the clamping force, automatically adapting to cables of different diameters.

[0017] 2. This invention designs a cooperative structure of flexible plate and variable curvature arc surface, so that the clamping force gradually increases with the rotation angle of the support rod, avoiding sudden impact of clamping force, and can automatically compensate for the dimensional changes of the cable caused by temperature changes, maintaining a constant clamping force, which can firmly fix the cable, effectively preventing the cable from loosening, falling off or shifting, and ensuring the accuracy of power metering and the safety of power supply. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of the present invention; Figure 2 This is a schematic diagram of the overall second-view structure of the present invention; Figure 3 This is a schematic diagram of the first fixed unit structure of the present invention; Figure 4 This is a schematic cross-sectional view of the first fixed unit of the present invention; Figure 5 This is a schematic diagram of the overall third-view structure of the present invention; Figure 6 This is a schematic diagram of the external structure of the metering box of the present invention; Figure 7 This is a schematic diagram of the internal structure of the metering box of the present invention.

[0019] In the diagram: 100, metering box; 200, electricity meter; 300, cable body; 400, wire clamp; 10, limit seat; 11, arc-shaped seat; 12, wire clamping groove; 13, pressure seat; 20, first fixing unit; 21, lower hinge seat; 22, support rod; 23, upper hinge seat; 24, arc-shaped mounting plate; 25, flexible plate; 26, limit strip; 27, arc-shaped slide groove; 28, arc-shaped slide bar; 29, arc-shaped plate; 210, hollow elastic clamping sleeve; 211, air storage bag; 212, pressure spring; 30, second fixing unit; 40, elastic band. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 7As shown, this embodiment discloses a cable limiting and fixing device for an electricity metering box, applied inside the metering box 100, for limiting and fixing the cable body 300 connected to the electricity meter 200. It includes a cable clamp 400 for limiting the cable body 300, which is fixedly installed on the inner wall of the metering box 100. The metering box 100 contains at least one set of electricity meters 200, and the cable clamp 400 is located below the electricity meters 200. After the cable body 300 is snapped into the cable clamp 400, it is fixedly installed on the electricity meter. On the 200, by placing the clamp 400 directly below the energy meter 200, the cable body 300 is limited and fixed before entering the energy meter 200. The tension generated by the cable's own weight is transferred to the clamp 400 instead of the terminal block, which effectively reduces the long-term stress load on the terminal block and prevents the terminal block from loosening, poor contact, or falling off due to the cable's own weight sagging. At the same time, it is convenient for construction personnel to complete the pre-positioning and pre-fixing of the cable before wiring, avoiding the cable shaking and displacement during the wiring process, and improving the convenience and accuracy of the wiring operation.

[0022] Each set of cable clamps 400 includes a limiting seat 10, with an integrally formed arc-shaped seat 11 at the outer end of the limiting seat 10. The arc-shaped seat 11 has a cable clamping groove 12, which is an arc-shaped groove. The cable body 300 is clamped in the cable clamping groove 12. A pressure seat 13 is fixed at the top center of the limiting seat 10, and the cable clamping groove 12 and the top of the limiting seat 10 have an arc transition. The elastic band 40 passes through the guide hole and is fixed to the bottom of the support rod 22. The arc design of the arc seat 11 and the cable clamping groove 12 can fit the cylindrical outer surface of the cable body 300. The arc-shaped transition between the cable slot 12 and the top of the limiting seat 10, forming a surface contact rather than a line or point contact, allows the cable body 300 to smoothly transition when entering the cable slot 12, avoiding right-angle bends. This effectively increases the contact area between the limiting seat 10 and the cable body 300, reduces the pressure per unit area, and prevents sharp edges from cutting the cable insulation layer. At the same time, the arc-shaped transition structure can significantly reduce stress concentration at cable bends, preventing cable breakage due to fatigue after long-term use, thus improving the cable's service life and operational safety.

[0023] The limiting seat 10 is symmetrically and oppositely arranged with a first fixing unit 20 and a second fixing unit 30, which are pulled together by an elastic band 40. The first fixing unit 20 and the second fixing unit 30 have the same structure, and the pressure seat 13 has a guide hole that matches the elastic band 40. By symmetrically and oppositely arranging two fixing units with the same structure on the limiting seat 10, and using the pulling action of the elastic band 40 to give the two fixing units a clamping force on the cable body 300, the elastic characteristics of the elastic band 40 can provide a continuous and stable supplement to the clamping force, preventing the clamping force from decaying after long-term use. At the same time, the elastic characteristics of the elastic band 40 can provide a continuous and stable supplement to the clamping force, preventing the clamping force from decaying due to component wear after long-term use. Moreover, the two fixing units are pulled together by the elastic band 40, forming a closed-loop force transmission system. When one fixing unit is subjected to an external force, the other fixing unit will provide a reverse pulling force through the elastic band 40, further improving the clamping stability of the cable body 300.

[0024] The first fixing unit 20 includes a hinge rod connected by a torsion spring. The other end of the hinge rod is movably connected to an arc-shaped mounting plate 24. The hinge rod includes a lower hinge seat 21 fixed to the top of the pressure seat 13. The lower hinge seat 21 is connected to a support rod 22 via a torsion spring, and the other end of the support rod 22 is fixed to an upper hinge seat 23. The arc-shaped mounting plate 24 is hinged to the upper hinge seat 23 via a pin, and a limiting strip 26 is fixed to the upper hinge seat 23 to limit the movement of the arc-shaped mounting plate 24. In use, the torsion spring provides an initial rotational torque to the support rod 22, causing the support rod 22 to rotate in the direction of the cable body 300 in its natural state. The arc-shaped mounting plate 24 and... The hinged connection of the upper hinge seat 23 allows the arc-shaped mounting plate 24 to rotate freely around the pin shaft, thereby adapting to the surface curvature and installation position of the cable body 300. The limiting strip 26 can limit the maximum rotation angle of the arc-shaped mounting plate 24. The initial clamping force provided by the torsion spring can ensure that the device is automatically in the clamping state when it is not subjected to external force, without the need for manual additional force. The hinged arc-shaped mounting plate 24 can adapt to the surface curvature of cables of different diameters, ensuring that the clamping surface is fully in contact with the surface of the cable body 300. The limiting strip 26 can prevent the arc-shaped mounting plate 24 from rotating excessively and causing the clamping direction to deviate, ensuring that the clamping force always acts perpendicularly on the surface of the cable body 300.

[0025] An arc-shaped plate 29 is slidably fitted onto the inner side of the arc-shaped mounting plate 24. An arc-shaped groove 27 is formed on the inner side of the arc-shaped mounting plate 24. An arc-shaped slide bar 28, which slides inside the arc-shaped groove 27, is fixed on the outer side of the arc-shaped plate 29. An air storage bag 211 is fixedly connected between the arc-shaped slide bar 28 and the rear side wall of the arc-shaped groove 27. The air storage bag 211 is made of 0.3mm thick butyl rubber material with good aging resistance and airtightness. It is pre-filled with 0.05-0.1MPa of dry air. Pressure springs 212 are fixedly connected between the arc-shaped slide bar 28 and the rear side wall of the arc-shaped groove 27 and are arranged on the left and right sides of the air storage bag 211. The axis of the pressure springs 212 is parallel to the sliding direction of the arc-shaped slide bar 28. The other side of the arc-shaped plate 29 is uniformly fixed. There is a hollow elastic clamping sleeve 210, and each set of hollow elastic clamping sleeves 210 is connected to the air storage bag 211 through the air guide tube. In the natural state, when the cable body 300 is placed inside the cable clamping groove 12, the hollow elastic clamping sleeve 210 naturally fits the surface of the cable body 300. The hollow elastic clamping sleeve 210 exerts pressure on the cable body 300. After the hollow elastic clamping sleeve 210 is subjected to the reaction force, it will undergo compression deformation, thereby increasing the squeezing area between the hollow elastic clamping sleeve 210 and the cable body 300, thereby increasing the anti-detachment friction force, realizing the positive correlation feedback between dragging force and clamping force, that is, the greater the dragging force, the greater the clamping force. The elastic band 40 will continuously provide the arc mounting plate 24 with the squeezing force on the cable body 300, improving the clamping stability.

[0026] Hollow elastic clamping sleeves 210 are evenly arranged in four groups along the arc direction of the arc plate 29, and each group of hollow elastic clamping sleeves 210 is a rubber air bag with a serrated clamping pad bonded to its surface. The clamping pad is made of insulating and wear-resistant silicone rubber material, and the height of the serrations on its surface is 0.5 mm and the tooth pitch is 1 mm. The height of the arc seat 11 is the same as the radius of the wire clamping groove 12, and the arc seat 11 corresponds to the hollow elastic clamping sleeve 210. The air guide tube is a polyurethane hose with an inner diameter of 2 mm.

[0027] When the cable body 300 is subjected to an outward drag force, the friction between the hollow elastic clamping sleeve 210 and the cable body 300 causes the arc-shaped slide bar 28 on the arc plate 29 to slide backward along the arc-shaped groove 27, while compressing the air storage bag 211 and the pressure spring 212. The pressure spring 212 can provide the main elastic support force, while the air storage bag 211 can play the role of auxiliary buffering and gas transmission. The sliding cooperation between the arc-shaped slide bar 28 and the arc-shaped groove 27 can ensure the stability of the movement trajectory of the arc plate 29 and avoid deviation. The combined structure of the pressure spring 212 and the air storage bag 211 can provide double elastic buffering.

[0028] After the air storage bag 211 is compressed, the gas inside it is introduced into the hollow elastic clamping sleeve 210 through the air guide tube, causing it to expand. This increases the squeezing force of the hollow elastic clamping sleeve 210 on the cable body 300, further increasing the anti-detachment force of the cable body 300. The compression of the air storage bag 211 can convert mechanical energy into gas pressure energy, providing a power source for the subsequent amplification of clamping force, so that the cable body 300 can achieve self-anti-detachment compensation when it is dragged outward.

[0029] Existing anti-detachment technologies mainly rely on increasing the roughness of the clamping surface or setting barbs. The anti-detachment force is a fixed value and cannot be automatically adjusted according to the dragging force. Moreover, the barbs can easily damage the cable insulation layer, posing a safety hazard. In this embodiment, the air storage bag 211 and the hollow elastic clamping sleeve 210 are connected through an internal air guide tube. When the cable body 300 is dragged, it drives the arc-shaped slider 28 to compress the air storage bag 211, directly converting the dragging force into gas pressure energy. This causes the hollow elastic clamping sleeve 210 to expand, realizing that the clamping force increases linearly with the increase of the dragging force, forming an active self-locking anti-detachment mechanism. The greater the dragging force, the greater the clamping force, which completely solves the problem of insufficient anti-detachment force in existing technologies. At the same time, this mechanism does not require any additional power source or control components, has a simple and reliable structure, and will not cause any damage to the cable insulation layer.

[0030] It should be noted that when the cable body 300 is placed inside the cable slot 12, the pressure exerted on the hollow elastic clamping sleeve 210 will vary depending on the diameter of the cable body 300. This allows for adaptive amplification of the clamping force of the cable body 300. That is, the larger the cable diameter, the greater the pressure exerted on the hollow elastic clamping sleeve 210. As a result, the air pressure inside the air storage bag 211 and the hollow elastic clamping sleeve 210 will be higher, and the clamping force of the hollow elastic clamping sleeve 210 will be greater. This allows the device to automatically adapt to cables of different diameters, significantly improving its versatility. At the same time, the serrated clamping pad can greatly increase the static friction between the clamping surface and the cable, effectively preventing the cable from sliding axially due to gravity, vibration, and other factors. The rubber hollow elastic clamping sleeve 210 can also provide good insulation and cushioning, preventing the cable from directly contacting metal parts.

[0031] A flexible plate 25 is fixedly connected to one end of the arc-shaped mounting plate 24 near the pressure seat 13. The flexible plate 25 is an arc-shaped baffle. The outer wall of the pressure seat 13 is set as an arc-shaped surface adapted to the flexible plate 25, and the curvature of the arc-shaped surface gradually increases from the end near the limit seat 10 to the end away from the limit seat 10. The bottom end of the flexible plate 25 always abuts against the arc-shaped surface of the pressure seat 13. When the support rod 22 rotates towards the cable body 300 under the action of the torsion spring and the elastic band 40, the flexible plate 25 fixed on the arc-shaped mounting plate 24 will slide along the arc-shaped surface of the pressure seat 13. As the curvature of the arc surface gradually increases, the flexible plate 25 will generate a gradually increasing elastic bending deformation, thereby applying a gradually increasing thrust to the arc mounting plate 24. This achieves a gradual adjustment of the clamping force, avoiding impact damage to the cable caused by a sudden increase in clamping force. At the same time, the elastic thrust generated by the flexible plate 25 can be superimposed with the force of the torsion spring and the elastic band 40, further enhancing the stability and reliability of the clamping force. When the cable expands and contracts due to temperature changes, the elastic deformation of the flexible plate 25 can automatically compensate for the dimensional changes of the cable, maintaining a constant clamping force.

[0032] Existing technologies often employ clamping forces that are abrupt or fixed, leading to problems such as sudden increases in clamping force that can damage cables and an inability to adapt to thermal expansion and contraction. In outdoor environments with significant day-night temperature differences, clamping loosening or insulation layer cracking is highly likely. This embodiment designs a cooperative structure between a flexible plate 25 and a variable curvature arc surface, allowing the clamping force to gradually increase with the rotation angle of the support rod 22. This achieves progressive adjustment of the clamping force, avoiding damage to the cable body 300 caused by sudden impacts from the clamping force. Simultaneously, the elastic deformation of the flexible plate 25 can automatically compensate for the changes in the cable body 300's thermal expansion and contraction within a range of ±2mm due to changes in ambient temperature, maintaining a constant clamping force. This prevents clamping loosening caused by cable contraction in winter and avoids insulation layer damage caused by cable expansion in summer.

[0033] This embodiment discloses a method for limiting and fixing cables in an energy metering box, which is implemented using the energy metering box cable limiting and fixing device described above. The steps of the fixing method are as follows: S1: Based on the actual installation position of the electricity meter 200 inside the metering box 100, mark the mounting hole position of the wire clamp 400 on the inner wall of the metering box 100, so that the axis of the wire clamp groove 12 of the wire clamp 400 and the axis of the corresponding terminal of the electricity meter 200 are in the same vertical plane. Then, use M4 self-tapping screws to fix the limit seat 10 in the marked position, ensuring that the limit seat 10 is installed firmly without shaking. Then, the cable body 300 that needs to be connected to the electricity meter 200 is introduced into the box from the inlet at the bottom of the metering box 100. The cable is straightened and the middle part of the cable body 300 is gently clamped into the wire clamp groove 12 of the limit seat 10. The front and back position of the cable body 300 is adjusted so that the end has sufficient wiring length and the end is aligned with the terminal of the electricity meter 200. S2: Hold the upper ends of the support rods 22 of the first fixing unit 20 and the second fixing unit 30 with both hands respectively, and simultaneously pull the two support rods 22 evenly to the left and right sides to overcome the initial torque of the torsion spring and the pulling effect of the elastic band 40, so that the two support rods 22 rotate outward around their respective lower hinge seats 21, driving the arc-shaped mounting plate 24 and arc-shaped plate 29 away from the cable body 300 until there is an operating gap of 5-10mm between the hollow elastic clamping sleeves 210 of the two fixing units and the cable body 300. S3: Slowly release both hands. Under the combined action of the initial torque of the torsion spring and the elastic restoring force of the elastic band 40, the two support rods 22 rotate synchronously toward the middle cable body 300, causing the arc-shaped mounting plate 24 and arc-shaped plate 29 to move closer to the cable body 300. When the serrated clamping pad on the surface of the hollow elastic clamping sleeve 210 contacts the surface of the cable body 300, the continuing rotation of the support rods 22 will cause the hollow elastic clamping sleeve 210 on the arc plate 29 to be subjected to the reaction force of the cable body 300, causing the hollow elastic clamping sleeve 210 to undergo compression deformation, which increases the air pressure inside the air storage bag 211 and the hollow elastic clamping sleeve 210, thereby increasing the contact area and clamping force with the cable body 300. S4: During this process, the flexible plate 25 slides along the variable curvature arc surface of the pressure seat 13 and generates gradually increasing elastic bending deformation, providing additional progressive clamping thrust, and finally firmly clamping the cable body 300 between the arc surface of the cable slot 12 and the hollow elastic clamping sleeves 210 of the two fixing units. S5: Use wire strippers to remove 10-15mm of insulation from the end of the cable body 300 to expose the internal copper core. Then, fully insert the copper core into the corresponding terminal of the energy meter 200. Use a screwdriver to tighten the fastening bolts of the terminal to ensure good contact between the copper core and the terminal without any looseness. Organize the excess cable inside the metering box 100 and fix it to the wire clip on the side wall of the box with cable ties. This completes the entire cable limiting and fixing operation and wiring.

[0034] It should be noted that a displacement sensor is fixed at the connection between the pressure spring 212 and the arc plate 29. The displacement sensor can effectively detect the movement distance of the arc plate 29. When the movement distance of the arc plate 29 is greater than the threshold, it indicates that when the cable body 300 is subjected to an outward dragging force, the friction between the hollow elastic clamp sleeve 210 and the cable body 300 is insufficient to resist the dragging force. As a result, the controller controls the alarm to sound, achieving the function of warning and reminder, and improving the anti-theft performance.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cable limiting and fixing device for an electricity metering box, comprising a cable clamp (400) for limiting the cable body (300), characterized in that: Each set of wire clamps (400) includes a limiting seat (10), on which a first fixing unit (20) and a second fixing unit (30) are symmetrically arranged and facing away from each other, and the first fixing unit (20) and the second fixing unit (30) are pulled together by an elastic band (40); The first fixing unit (20) includes a hinge rod connected by a torsion spring. The other end of the hinge rod is movably connected to an arc-shaped mounting plate (24). An arc-shaped plate (29) is slidably mounted on the inner side of the arc-shaped mounting plate (24). An arc-shaped groove (27) is opened on the inner side of the arc-shaped mounting plate (24). An arc-shaped slide bar (28) that slides inside the arc-shaped groove (27) is fixed on the outer side of the arc-shaped plate (29). An air storage bag (211) is fixedly connected between the arc-shaped slide bar (28) and the rear side wall of the arc-shaped groove (27). A pressure-bearing spring (212) is fixedly connected between the arc-shaped slide bar (28) and the rear side wall of the arc-shaped groove (27) on the left and right sides of the air storage bag (211). Hollow elastic clamping sleeves (210) are evenly fixed on the other side of the arc-shaped plate (29). Each set of hollow elastic clamping sleeves (210) is connected to the air storage bag (211) through an air guide pipe.

2. The cable limiting and fixing device for the power metering box according to claim 1, characterized in that: The outer end of the limiting seat (10) is integrally formed with an arc-shaped seat (11), and a wire-clamping groove (12) is provided on the arc-shaped seat (11). The wire-clamping groove (12) is an arc-shaped groove, and the cable body (300) is clamped in the wire-clamping groove (12). A pressure seat (13) is fixed at the middle position of the top of the limiting seat (10), and the wire-clamping groove (12) and the top of the limiting seat (10) are arc-shaped transitions.

3. The cable limiting and fixing device for the power metering box according to claim 2, characterized in that: The hinge rod includes a lower hinge seat (21) fixed to the top of the pressure seat (13), the lower hinge seat (21) is connected to a support rod (22) by a torsion spring, and the other end of the support rod (22) is fixed to an upper hinge seat (23). The arc-shaped mounting plate (24) is hinged to the upper hinge seat (23) by a pin, and a limiting strip (26) is fixed on the upper hinge seat (23) to limit the arc-shaped mounting plate (24).

4. The cable limiting and fixing device for the power metering box according to claim 3, characterized in that: The first fixing unit (20) and the second fixing unit (30) have the same structure, and the pressure seat (13) has a guide hole that matches the elastic band (40), and the elastic band (40) passes through the guide hole and is fixed to the bottom of the support rod (22).

5. The cable limiting and fixing device for the power metering box according to claim 2, characterized in that: The curved mounting plate (24) is fixedly connected to a flexible plate (25) at one end near the pressure seat (13). The outer wall of the pressure seat (13) is set as a curved surface, the flexible plate (25) is a curved baffle, and the bottom end of the flexible plate (25) abuts against the curved surface.

6. The cable limiting and fixing device for the power metering box according to claim 5, characterized in that: The height of the arc-shaped seat (11) is the same as the radius of the wire clamping groove (12), and the arc-shaped seat (11) corresponds to the hollow elastic clamping sleeve (210).

7. The cable limiting and fixing device for the power metering box according to claim 1, characterized in that: The hollow elastic clamping sleeve (210) is evenly arranged in four groups along the arc direction of the arc plate (29), and each group of hollow elastic clamping sleeves (210) is set as a rubber air bag with a serrated clamping pad bonded to its surface.

8. The cable limiting and fixing device for the power metering box according to claim 1, characterized in that: The wire clamp (400) is fixedly installed on the inner wall of the metering box (100), and the metering box (100) contains at least one set of electricity meters (200). The wire clamp (400) is located below the electricity meter (200). The cable body (300) is snapped into the wire clamp (400) and then fixedly installed on the electricity meter (200).

9. A method for limiting and fixing cables in an electricity metering box, implemented using the cable limiting and fixing device for an electricity metering box as described in any one of claims 1-8, characterized in that: The steps of the fixation method are as follows: S1: Based on the actual installation position of the electricity meter (200) inside the metering box (100), mark the installation hole position of the wire clamp (400) on the inner wall of the metering box (100), so that the axis of the wire clamp groove (12) of the wire clamp (400) and the axis of the corresponding terminal of the electricity meter (200) are in the same vertical plane, and ensure that the limit seat (10) is installed firmly without shaking. Then, the cable body (300) that needs to be connected to the electricity meter (200) is introduced into the box from the inlet at the bottom of the metering box (100), the cable is straightened, and the cable body (300) is clamped in the wire clamp groove (12) of the limit seat (10). The front and rear positions of the cable body (300) are adjusted so that the end has sufficient wiring length and the end is aligned with the terminal of the electricity meter (200). S2: Hold the upper ends of the support rods (22) of the first fixed unit (20) and the second fixed unit (30) with both hands respectively, and simultaneously pull the two support rods (22) evenly to the left and right sides to overcome the initial torque of the torsion spring and the pulling effect of the elastic band (40), so that the two support rods (22) rotate outward around their respective lower hinge seats (21), driving the arc mounting plate (24) and arc plate (29) away from the cable body (300) until there is an operating gap of 5-10mm between the hollow elastic clamping sleeves (210) of the two fixed units and the cable body (300); S3: Slowly release both hands. Under the combined action of the initial torque of the torsion spring and the elastic restoring force of the elastic band (40), the two support rods (22) rotate synchronously toward the middle cable body (300), causing the arc mounting plate (24) and the arc plate (29) to move closer to the cable body (300). When the serrated clamping pad on the surface of the hollow elastic clamping sleeve (210) contacts the surface of the cable body (300), the continued rotation of the support rod (22) will cause the hollow elastic clamping sleeve (210) on the arc plate (29) to be subjected to the reaction force of the cable body (300), causing the hollow elastic clamping sleeve (210) to undergo compression deformation, which increases the air pressure inside the air storage bag (211) and the hollow elastic clamping sleeve (210), thereby increasing the contact area and clamping force with the cable body (300). S4: During the clamping process, the flexible plate (25) slides along the variable curvature arc surface of the pressure seat (13) and generates gradually increasing elastic bending deformation, providing additional progressive clamping thrust, and finally firmly clamping the cable body (300) between the arc surface of the cable slot (12) and the hollow elastic clamping sleeve (210) of the two fixed units.

Images