High-precision intelligent electric energy metering box

Abstract

The invention belongs to the technical field of metering boxes, and particularly relates to a high-precision intelligent electric energy metering box which comprises an insulating support, a main body unit is arranged outside the insulating support, elastic buckling units are arranged on the end face of the insulating support in an array mode, and multi-degree-of-freedom buffer units are arranged in the elastic buckling units. A multi-degree-of-freedom elastic buffering combination is formed through first-stage radial buffering elastic supporting of the spring buckling shovel, second-stage low-frequency damping supporting of the torsion spring and third-stage high-frequency buffering absorption of the spiral spring, external vibration is converted into elastic deformation potential energy by utilizing the energy storage, energy release and internal friction characteristics of the elastic element, and therefore the elastic buffering effect is achieved. The load is not transmitted to a connection pair to form an alternating load; the complex damping bandwidth variable created by the three-point spring buckling shovel is complementary with the damping coverage range of the step guide wheel and the spiral spring, and the resonance probability of a connecting pair and external vibration is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of metering box technology, specifically relating to a high-precision intelligent power metering box. Background Technology

[0002] Smart metering boxes: Essentially, they are intelligent upgrades of metering terminals. Based on the core functions of traditional metering boxes for electricity metering, they integrate technologies such as the Internet of Things, sensor detection, wireless communication, edge computing, and remote control. They are new types of power metering equipment with capabilities such as accurate collection of electricity data, real-time transmission, online status monitoring, proactive fault warning, remote operation and maintenance management, and intelligent anti-theft of electricity.

[0003] For the relevant electronic components inside the metering box, the conventional technical method is to use an insulating mounting plate for support and installation, and then install the insulating mounting plate to the inner wall of the metering box or an insulating bracket with bolts.

[0004] Summary of reasons for loose bolt connections between the insulating mounting plate and the insulating bracket of the smart energy metering box:

[0005] 1. Smart metering boxes are mostly installed on outdoor utility poles, building exteriors, or near equipment such as transformers and switch cabinets. During this process, external vibrations such as vibrations from power grid equipment operation, vehicle traffic, or wind disturbances are continuously transmitted through the box to the bolt connection pair, forming an alternating load. This leads to slight relative slippage between the threaded contact surfaces of the bolts and nuts. Over a long period of time, this disrupts the balance of friction between the threads, eventually causing loosening.

[0006] In addition, in extreme vibration scenarios (e.g., impact from nearby construction or equipment failure), the instantaneous impact force exceeds the thread tightening force threshold, directly causing impact loosening;

[0007] 2. The outdoor metering box has extreme temperature differences, which cause a difference in the coefficient of thermal expansion between the insulating mounting plate and the insulating bracket. This results in relative displacement of the working surfaces of the two when the temperature changes, which repeatedly pulls on the bolt connection pair and destroys the preload between them.

[0008] In addition, in humid and salt spray environments, the bolt surface is prone to electrochemical corrosion, and a rust layer is formed on the thread contact surface, which reduces the coefficient of friction. At the same time, corrosion causes thread tooth wear, weakening the locking force; and even the insulation material absorbs moisture and expands, further amplifying the stress deformation of the connection pair and accelerating loosening.

[0009] The aforementioned loose bolts will directly lead to electrical connection failure, causing equipment failure, measurement accuracy distortion, mechanical damage and shortened component life, escalation of safety risks, fire or electric shock accidents, and failure of intelligent functions, affecting remote operation and maintenance and other problems. Summary of the Invention

[0010] To solve the above problems, the present invention adopts the following technical solution: a high-precision intelligent power metering box, including an insulating support, at least four, arranged in pairs in a symmetrical distribution, with U-shaped grooves symmetrically opened on the inner wall of the vertical section at one end of the insulating support, a main body unit set outside the insulating support, and elastic fastening units arranged in an array on the end face of the insulating support, with multi-degree-of-freedom buffer units set inside the elastic fastening units.

[0011] The multi-degree-of-freedom buffer unit includes:

[0012] A collar is disposed on one side of the insulating support and is distributed opposite to the U-shaped groove on its surface;

[0013] The shaft disc is snapped onto the end of the shaft collar that is away from the insulating support.

[0014] Angle rods, in groups of three, are installed on the end face of the shaft disc in a circumferentially uniform plug-in rotatable fit;

[0015] The buffer gripper is snapped onto the outer wall of the angle bar;

[0016] The lead screw is rotatably fitted onto the buffer gripper at the middle position of the end away from the angle bar, and the lead screw passes through the buffer gripper.

[0017] The stepped guide wheels are symmetrically arranged at both ends of the outer wall of the lead screw, and the stepped guide wheels are threadedly fitted to the lead screw.

[0018] The damping ring is snap-fitted onto the outer wall of the stepped guide wheel;

[0019] The guide ring is snapped onto the end face of the stepped guide wheel near the middle area of ​​the lead screw, and the guide ring is slidably snapped onto the buffer jaws.

[0020] The T-rings are symmetrically arranged at the center points of the three buffer grippers in the same group.

[0021] Preferably, a toothed pulley is snapped onto the outer wall of the angle rod opposite to the buffer gripper, and a toothed belt is installed between the outer walls of the three toothed pulleys in the same group. A compensating ring is snapped onto the end face of the shaft disc opposite to the toothed pulley. A gasket, which is snapped onto the buffer gripper, is rotatably fitted onto the outer wall of the angle rod near the shaft disc. A sealing ring is symmetrically fitted onto the outer wall of the angle rod, with one sealing ring snapped onto the inner wall of the gasket and the other sealing ring snapped onto the compensating ring. A torsion spring is snapped onto the two sealing rings in the same group. A retaining ring, which is plugged into the compensating ring, is snapped onto the sealing ring at the end away from the gasket. The inner wall of the retaining ring has symmetrical shaft grooves.

[0022] Preferably, a guide bar is slidably snapped onto the inner wall of the shaft groove, and two guide bars in the same group are snapped onto an angle ring at the ends away from the retaining ring. A buffer cylinder is coaxially arranged outside the angle ring and snapped onto the same compensation ring platform. An angle cylinder is snapped onto the middle position of the inner wall of the buffer cylinder at the end away from the retaining ring and is slidably snapped onto the same angle ring. A telescopic spring is snapped onto the buffer cylinder and the angle cylinder together. A support column is snapped onto the end of the angle rod near the buffer cylinder. A guide plate is symmetrically snapped onto the outer wall of the support column, and a guide post that cooperates with the guide plate is symmetrically snapped onto the inner wall of the angle cylinder.

[0023] Preferably, a vertical rod is snapped onto the end of the support column away from the corner rod, and an angle strip is snapped onto the outer wall of the vertical rod. Angle beads are evenly arranged in an array on the outer wall of the end of the angle strip away from the axis of the vertical rod, and the angle beads are rolled together with the angle strip. An angle steel ring is rotatably installed in the middle position of the inner wall of the angle cylinder, and a break groove is opened on the inner wall of the angle steel ring.

[0024] Preferably, an outer corner rod is snapped onto the end of the vertical rod away from the support column, and the outer corner rod penetrates the corner tube. A helical spring is snapped onto the angle steel ring and the inner wall of the corner tube. A hollow ring is provided on the outside of the outer corner rod, directly opposite to it.

[0025] Preferably, the main body unit includes:

[0026] The enclosure is a single unit, located outside the insulating support. The enclosure is snapped into the outer wall of the insulation unit near the gravity side.

[0027] The control door is installed on one side of the opening end of the housing via door hinges;

[0028] The metering door is installed on the other side of the opening end of the box via a hinge.

[0029] The back panel is snapped onto the end of the enclosure away from the control door.

[0030] The heat dissipation windows are symmetrically snapped onto both sides of the enclosure, and the heat dissipation windows are vertically distributed with the back panel.

[0031] The cable tray is snapped into place in the middle of the cabinet, between the control door and the metering door;

[0032] An insulating mounting plate, at least one, is evenly arranged in an array between two insulating supports in the same group;

[0033] The insulating base plate is symmetrically arranged inside the enclosure, and the insulating base plate is snapped together with the back plate.

[0034] The circuit components are evenly distributed on the end face of the insulating mounting plate; in addition, the circuit components specifically include: circuit breakers, terminal blocks and meters.

[0035] Preferably, the elastic fastening unit includes:

[0036] The cap stands, in pairs or at least in groups, are symmetrically snapped onto the outer wall of the vertical section of the insulating support, and the inner wall of the cap stands is provided with spiral grooves; in addition, the two cap stands in the same group are symmetrically distributed at both ends of the insulating mounting plate.

[0037] The snap-fit ​​sleeve is threadedly installed on the inner wall of the cap holder; in addition, the snap-fit ​​sleeve is snapped into the inner wall of the hollow ring.

[0038] The horn tube is slidably snapped into place at the middle position of the end of the fastening tube away from the insulating mounting plate, and the horn tube passes through the fastening tube;

[0039] An angle ring is snapped into place at the middle position of the outer wall of the horn tube;

[0040] The return spring is snapped between the inner wall of the fastening cylinder and the corner ring;

[0041] The cross-shaped connecting rods are symmetrically snapped onto both ends of the insulating mounting plate, and the cross-shaped connecting rods are coaxially arranged with the snap-fit ​​cylinder.

[0042] The end cap is snapped onto the end of the cross link away from the insulating mounting plate.

[0043] The positioning ring is snapped onto the outer wall of the cross link near the insulating mounting plate.

[0044] The double-sided conical ring is coaxially positioned between the positioning ring and the end cap via a spring, and the double-sided conical ring is slidably assembled with the outer wall of the cross connecting rod.

[0045] Preferably, the inner wall of the horn tube near the end cap has three sealing grooves circumferentially. A sealing ring is snapped onto the inner wall of the sealing groove near the axis of the end cap. A fastening ring is provided on the side of the sealing ring away from the axis of the end cap, which is slidably assembled with the inner wall of the sealing groove. A spring fastening shovel is snapped onto the center of the sealing ring through the slidably, which is also snapped onto the fastening ring. The end of the spring fastening shovel away from the fastening ring is chamfered to match the end cap.

[0046] Preferably, the T-ring is snapped together with the outer wall of the cross link, the break groove is a three-quarters annular groove, the collar is snapped together with the inner wall of the snap-fit ​​cylinder near the insulating mounting plate, the limit relative movement distance between the spring snap-fit ​​shovel and the end cap is less than the vertical distance between the horn tube and the outer corner rod, and the vertical distance between the insulating bracket and the housing or wiring board is greater than the axial width of the snap-fit ​​cylinder.

[0047] The multi-degree-of-freedom buffer quick-connection method between components of the metering box is implemented using the aforementioned high-precision intelligent energy metering box. The specific steps are as follows:

[0048] S1: First, the U-shaped groove on the end face of the insulating bracket provides passage conditions to the cross link. The cross link controls the insulating mounting plate to move to the predetermined position. In specific implementation, scale marks can be added to the corresponding surfaces of the insulating mounting plate and the insulating bracket to create a basic environment for assembly and calibration. Then, the operator turns the fastening sleeve until the fastening sleeve rotates to the assembly limit between the base.

[0049] Then, the horn tube is pressed to the predetermined depth by manual pressing. During this process, the spring-loaded snap shovel and the end cap make relative contact movement. Under the dual support and guidance of the sealing ring and the snap ring, the spring-loaded snap shovel moves in a retracting motion into the sealing groove. At the moment when the end cap and the spring-loaded snap shovel are misaligned, there is an instantaneous space clearance between the spring-loaded snap shovel and the outer wall of the cross link. As a result, the spring-loaded snap rod moves in the opposite direction under the influence of its own elastic properties, and restricts the reset of the horn tube. Then, it provides a three-point layout of relative pre-tightening support in the direction of the cross link axis.

[0050] Furthermore, the three-point spring-locked shovel provides radial support to the cross link, and through its own elasticity, it provides further radial buffering variables to the cross link, creating more complex damping bandwidth variables and reducing the probability of resonance.

[0051] S2: Next, the torsion spring provides another form of damping active support to the buffer gripper, thereby ensuring low-frequency shock absorption and buffering support for the radial runout of the stepped guide wheel to the cross link. Through the elastic damping of the sealing ring itself, additional shaft buffering variables are provided to the corner rod while reducing the wear of the torsion spring, improving the coverage of the damping bandwidth and increasing the service life of the torsion spring.

[0052] During this process, by changing the relative motion between the cross link and the stepped guide wheel, the rotation angle of the stepped guide wheel itself is changed, which causes the stepped guide wheel to change the relative contact area between the stepped guide wheel and the T-ring under the support of the guide ring and the tangential guidance of the screw. On the one hand, this is beneficial to improve the relative shock absorption effect, and on the other hand, it can reduce the relative wear between the two.

[0053] The buffer gripper is also set up with a three-point statically determinate structure (equilateral triangle layout) to achieve the same vibration reduction support for the radial degree of freedom of the cross link under any external angle vibration;

[0054] S3: Finally, by changing the relative rotation angle of the corner rod, the relative interaction depth between the guide post and the guide plate is changed. When the rotation angle of the corner rod reaches the predetermined value, the corner ring is forced to control the guide bar to disengage from the shaft groove under the guidance of the corner cylinder. At this time, the corner bar rotates to the critical value in the break groove. When the rotation angle of the corner rod exceeds the predetermined value, the corner bar abuts against the inner wall of the vertical section on one side of the break groove, and drives the helical spring to rotate under the support of the corner cylinder. This is to cope with the local high-frequency radial runout environment of the cross link once. Thus, a multi-degree-of-freedom elastic buffer combination layout of "multiple low-frequency" plus "small amount of high-frequency vibration adaptation" is formed.

[0055] The present invention has the following beneficial effects:

[0056] 1. This invention forms a multi-degree-of-freedom elastic buffer combination by using a primary radial buffer elastic support of a spring-locked shovel, a secondary low-frequency damping support of a torsion spring, and a tertiary high-frequency buffer absorption of a helical spring. By utilizing the energy storage, energy release, and internal friction characteristics of elastic elements, external vibrations are converted into elastic deformation potential energy, rather than being transmitted to the connecting joint to form an alternating load. Among them, the complex damping bandwidth variable created by the three-point spring-locked shovel complements the damping coverage of the stepped guide wheel and the helical spring, significantly reducing the resonance probability between the connecting joint and external vibrations.

[0057] Furthermore, for instantaneous impact forces in extreme vibration scenarios, the switching between the torsion spring and the helical spring is triggered by the "exceeding the limit" of the angle bar rotation angle. The impact energy is then absorbed by the instantaneous deformation of the helical spring. On the one hand, this avoids "impact loosening" caused by the impact force directly exceeding the locking force threshold of the connecting pair; on the other hand, it prevents irreversible damage to the torsion spring caused by the instantaneous impact force, providing redundant protection capabilities. This ensures the operational reliability and structural durability of both the torsion spring and the helical spring, and solves the assembly pain points of single damping structures, such as poor broadband vibration adaptability, easy penetration of high-frequency vibration, and the existence of end plates in damping effectiveness.

[0058] 2. This invention employs an equilateral triangle three-point statically determinate layout for the buffer gripper. Based on the mechanical principle that three points determine a plane, external vibrations at any angle can be decomposed into uniform force components at the three support points. The combined stiffness and damping remain consistent in any radial degree of freedom, avoiding local stress concentration caused by uneven force distribution in traditional bolted connections. At the same time, the radial support of the three-point spring-locked shovel and the statically determinate structure of the buffer gripper form a double isotropic guarantee, ensuring that the connection pair is subjected to uniform force under external vibrations at any angle, with no risk of directional selective slippage.

[0059] In addition, the three-point layout is a statically determinate structure, and the internal force distribution is uniquely determined by the static equilibrium equation. There is no redundant constraint of the statically indeterminate structure. That is, when extreme temperature difference causes thermal expansion difference between the insulating mounting plate and the insulating bracket, the elastic support can compensate for the relative displacement through its own deformation, avoid the additional tensile force caused by thermal deformation of traditional bolt connection, and maintain the stability of preload.

[0060] 3. This invention changes the rotation angle of the stepped guide wheel by the relative movement of the cross link and the stepped guide wheel, thereby adjusting its relative contact area with the T-ring. This achieves the following: when the vibration amplitude is relatively small, the contact area is reduced, thus reducing wear; conversely, the contact area is increased, thus improving the shock absorption effect, creating a dynamic balance between shock absorption effect and wear degree. At the same time, the elastic damping of the sealing ring can reduce the direct friction between the torsion spring and the angle rod, reduce the spring wear rate, and increase the service life.

[0061] In addition, the three toothed pulleys are arranged in an equilateral triangle and share a toothed belt, forming a linkage structure that supports and calibrates each other. When a single corner bar wears or the torsion spring loses elasticity, the torsion spring in the remaining position is pulled by the toothed belt to force the corner bar in the failed area to reset, avoiding overall support imbalance caused by the performance degradation of local components, and solving the defect of single-point failure of traditional bolted connections, which leads to overall loosening. Attached Figure Description

[0062] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0063] Figure 2 This is a plan view of the internal structure of the box of the present invention.

[0064] Figure 3 This is a perspective view of the assembly of the insulating bracket and the insulating mounting plate in this invention.

[0065] Figure 4 This is a three-dimensional view of the fastening cylinder and the cap stand assembled according to the present invention.

[0066] Figure 5 This is a three-dimensional view of the internal structure of the snap-fit ​​cylinder of the present invention.

[0067] Figure 6 This is a planar view of the elastic fastening unit in this invention.

[0068] Figure 7 This is a three-dimensional structural diagram of the multi-degree-of-freedom buffer unit in this invention.

[0069] Figure 8 This is an appendix to the present invention. Figure 7 Top view of the structure.

[0070] Figure 9 This is a three-dimensional view of the internal structure of the central collar and compensation ring platform in this invention.

[0071] Figure 10 This is a planar representation of the multi-degree-of-freedom buffer unit in this invention.

[0072] Figure 11 This is a three-dimensional view of the buffer gripper and its partial structure in this invention.

[0073] Figure 12 This is an internal plan view of the assembly of the stepped guide wheel and the buffer gripper in this invention.

[0074] The diagram is labeled as follows: 1. Insulating support; 2. Main body unit; 3. Elastic fastening unit; 4. Multi-free buffer unit.

[0075] 21. Enclosure; 22. Control door; 23. Metering door; 24. Back panel; 25. Heat dissipation window; 26. Cable management board; 27. Insulating mounting plate; 28. Insulating base plate; 29. ​​Circuit components;

[0076] 31. Cap stand; 32. Fastening cylinder; 33. Trumpet cylinder; 34. Angle ring; 35. Return spring; 36. Cross linkage; 37. End cap; 38. Positioning ring; 39. Double-sided conical ring;

[0077] 311. Sealing groove; 312. Sealing ring; 313. Snap-fit ​​ring; 314. Spring snap-fit ​​spatula;

[0078] 41. Collar; 42. Shaft disc; 43. Angle bar; 44. Buffer gripper; 45. Lead screw; 46. Stepped guide wheel; 47. Damping ring; 48. Guide ring; 49. T-joint ring;

[0079] 411. Toothed pulley; 412. Toothed belt; 413. Compensating ring platform; 414. Washer; 415. Sealing ring; 416. Torsion spring; 417. Snap ring; 418. Shaft groove;

[0080] 421. Guide bar; 422. Corner ring; 423. Buffer cylinder; 424. Angle cylinder; 425. Telescopic spring; 426. Support column; 427. Guide plate; 428. Guide post;

[0081] 431. Plumb rod; 432. Angle bar; 433. Angle bead; 434. Angle ring; 435. Displacement groove;

[0082] 441. Outer rod; 442. Helical spring; 443. Hollow ring. Detailed Implementation

[0083] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0084] It should be noted that the terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0085] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0086] Reference Figure 3 , Figure 5 and Figure 9 It is known that a high-precision intelligent power metering box includes an insulating support 1, at least four of which are arranged in pairs and symmetrically distributed. The inner wall of the vertical section at one end of the insulating support 1 is symmetrically provided with U-shaped grooves. The main body unit 2 is provided on the outside of the insulating support 1. The end face of the insulating support 1 is provided with elastic fastening units 3 in an array. The elastic fastening unit 3 is provided with a multi-degree-of-freedom buffer unit inside.

[0087] Reference Figure 1 and Figure 2 It can be seen that the main unit 2 includes: a box 21, which is installed outside the insulating support 1 and is snapped onto the outer wall of the insulating support near the gravity end; a control door 22, which is installed on one side of the opening end of the box 21 through a door hinge; a metering door 23, which is installed on the other side of the opening end of the box 21 through a door hinge; a back plate 24, which is snapped onto the end of the box 21 away from the control door 22; and heat dissipation windows 25, which are symmetrically snapped onto both sides of the box 21, and the heat dissipation windows 25 are connected to the back plate 24. The wiring is arranged vertically; the wiring board 26 is snap-fitted into the middle of the inside of the housing 21, and is located between the control door 22 and the metering door; there is at least one insulating mounting plate 27, which is evenly arranged in an array between two insulating supports 1 in the same group; the insulating base plate 28 is symmetrically arranged inside the housing 21, and the insulating base plate 28 is snap-fitted into the back plate 24; the circuit elements 29 are evenly distributed on the end face of the insulating mounting plate 27; in addition, the circuit elements 29 specifically include: circuit breakers, terminal blocks and meters;

[0088] Simplified operating steps of a smart electricity metering box:

[0089] First, the external power supply cable is introduced through the inlet hole of the housing 21 (not shown in the figure), and after being neatly arranged by the cable tray 26, it is connected to the inlet end of the terminal block; then, the outlet end of the terminal block is connected to the inlet end of the circuit breaker through the wire, and the outlet end of the circuit breaker is connected to the corresponding terminal of the meter (similarly, the cable passes through the pre-set hole on the end face of the cable tray 26).

[0090] The cable is connected in an orderly manner through the cable tray 26 and terminal block. In specific implementation, the insulation characteristics of the insulating mounting plate 27 and the insulating bracket 1 are used to ensure electrical isolation between the live components and the enclosure 21, and to avoid the risk of leakage.

[0091] Next, after the circuit is powered on, the meter collects electrical energy data such as voltage and current in real time, and uploads the data to the power cloud platform through the built-in communication module (not shown in the figure, but supported by existing technology); at the same time, the circuit breaker monitors the circuit load in real time, and automatically trips when an overload or short circuit occurs, providing protection support to the internal electronic components.

[0092] Finally, maintenance personnel can operate the circuit breaker to close or open through control door 22 (in practice, it can also be controlled remotely), and at the same time, they can view meter data or perform calibration through metering door 23;

[0093] When there is an external vibration source, the elastic fastening unit 3 and the multi-degree-of-freedom buffer unit automatically implement coordinated vibration reduction to maintain the stable connection between the insulating mounting plate 27 and the insulating bracket 1.

[0094] Insulating bracket 1: On the one hand, it ensures the smooth assembly of the elastic fastening unit 3 and the multi-degree-of-freedom buffer unit with the insulating mounting plate 27 (and facilitates later maintenance); on the other hand, it provides passage space for internal connectors (mainly: cross connecting rod 36) through the U-groove, and also serves as a support and wiring channel.

[0095] Reference Figure 4 , Figure 5 and Figure 6 It is known that the elastic fastening unit 3 includes: a cap platform 31, two of which are in a group, at least one group, and are symmetrically snapped onto the outer wall of the vertical section of the insulating bracket 1, and the inner wall of the cap platform 31 is provided with a spiral groove; in addition, the two cap platforms 31 in the same group are symmetrically distributed at both ends of the insulating mounting plate 27; a fastening cylinder 32, which is threaded onto the inner wall of the cap platform 31; in addition, the fastening cylinder 32 is snapped onto the inner wall of the hollow ring 443; and a horn cylinder 33, which is slidably snapped onto the middle position of the end of the fastening cylinder 32 away from the insulating mounting plate 27, and the horn cylinder 33 penetrates the fastening cylinder 32.

[0096] Angle ring 34 is snapped into the middle of the outer wall of the horn tube 33; return spring 35 is snapped into the inner wall of the fastening cylinder 32 and between the angle ring 34; cross link 36 is symmetrically snapped into both ends of the insulating mounting plate 27, and the cross link 36 is coaxially arranged with the fastening cylinder 32; end cap 37 is snapped into the end of the cross link 36 away from the insulating mounting plate 27; positioning ring 38 is snapped into the outer wall of the end of the cross link 36 near the insulating mounting plate 27; double-sided conical ring 39 is coaxially arranged between the positioning ring 38 and the end cap 37 through the spring, and the double-sided conical ring 39 is slidably assembled with the outer wall of the cross link 36.

[0097] Reference Figure 5 and Figure 6 It can be seen that the inner wall of the horn tube 33 near the end cap 37 is provided with three sealing grooves 311. A sealing ring 312 is snapped onto the inner wall of the sealing groove 311 near the axis of the end cap 37. A fastening ring 313 is provided on the side of the sealing ring 312 away from the axis of the end cap 37, which is slidably assembled with the inner wall of the sealing groove 311. A spring fastening shovel 314 is snapped onto the axis of the sealing ring 312 through and slidingly snapped onto the same fastening ring 313. The end of the spring fastening shovel 314 away from the fastening ring 313 is chamfered to match the end cap 37.

[0098] The quick-connect process between the insulating mounting plate 27 and the insulating bracket 1:

[0099] First, the maintenance personnel move the insulating mounting plate 27 to the predetermined position through the U-shaped groove on the end face of the insulating bracket 1 (in specific implementation, a space is reserved on the side of the insulating bracket 1 and the box 21 away from gravity to facilitate the maintenance personnel's inspection and daily maintenance work; and the corresponding end faces of the insulating bracket 1 and the insulating mounting plate 27 can be etched with etch lines to create a quick and accurate relative alignment between the two). At this time, the cap platform 31 is directly opposite to the insulating mounting plate 27. Then, the maintenance personnel align the fastening cylinder 32 and the cap platform 31 and turn the fastening cylinder 32 until the fastening cylinder 32 and the cap platform 31 reach the engagement limit.

[0100] Next, the maintenance personnel manually press the horn tube 33 to a predetermined depth. The horn tube 33 in the moving state generates relative displacement with the end cap 37 (relatively stationary). The relative depth of action between the spring-loaded snap shovel 314 and the end cap 37 gradually increases until the spring-loaded snap shovel 314 separates from the end cap 37. After that, under the action of its own elastic variable recovery, the spring-loaded snap shovel 314 moves towards the axis of the end cap 37 when the end cap 37 is misaligned, until the spring-loaded snap shovel 314 abuts against the outer wall of the cross link 36. Under the reverse action of the return spring 35, the horn tube 33 causes the spring-loaded snap shovel 314 to provide axial limiting locking force to the end cap 37, thereby stabilizing the positional stability of the insulating mounting plate 27 between the insulating brackets 1.

[0101] Finally, when it is necessary to remove the insulating mounting plate 27, the maintenance personnel manually press the horn tube 33 again. During this process, the relative action between the spring-loaded shovel 314 and the cross link 36 in the axial direction continues to deepen until the spring-loaded shovel 314 and the double-sided conical ring generate relative movement. When the maintenance personnel release the horn tube 33, under the restoring force of the return spring 35, the spring-loaded shovel 314 uses the relative friction between itself and the double-sided conical ring 39 to temporarily drive the double-sided conical ring 39 to slide towards the horn tube 33 until the double-sided conical ring 39 contacts the end cap 37. After that, under the guiding action of the inclined surface of the double-sided conical ring 39 (in specific implementation, the outer diameter of the double-sided conical ring 39 is larger than the outer diameter of the end cap 37), the spring-loaded shovel 314 directly breaks through the junction area of ​​the end cap 37 and the cross link 36, thereby releasing the axial elastic restriction of the spring-loaded shovel 314 on the end cap 37.

[0102] In addition, in specific implementation, the return spring 35 provides axial horizontal shock absorption to the insulating mounting plate 27 and the insulating bracket 1 (by utilizing the elastic properties of the return spring 35 to absorb and dissipate external vibrations), further ensuring the relative "comprehensiveness" of shock absorption between the insulating mounting plate 27 and the insulating bracket 1.

[0103] Meanwhile, through the statically determinate structural distribution of triangular points, the spring-loaded shovel 314 provides radial shock absorption and buffer support for the cross link 36 at any angle (based on the mechanical principle that three points determine a plane, external vibration at any angle can be decomposed into uniform component forces at the three support points, and the combined stiffness and damping remain consistent in any radial degree of freedom, avoiding local stress concentration caused by uneven force distribution in traditional bolt connections).

[0104] The purpose of rounding the working surfaces of the spring-loaded snap shovel 314 and the cap 37 at the same end is to reduce the relative contact loss between the two, increase their relative service life, improve the smoothness of contact between them, and to a certain extent improve the responsiveness of the elastic engagement.

[0105] Reference Figure 5 , Figure 11 and Figure 12It can be seen that the multi-degree-of-freedom buffer unit includes: a collar 41, which is disposed on one side of the insulating support 1 and is distributed opposite to the U-shaped groove on its surface; a shaft disk 42, which is snapped onto the end of the collar 41 away from the insulating support 1; three angle rods 43, which are circumferentially and uniformly inserted and rotated on the end face of the shaft disk 42; a buffer gripper 44, which is snapped onto the outer wall of the angle rod 43; and a lead screw 45, which is rotated and installed at the middle position of the end of the buffer gripper 44 away from the angle rod 43. 5. Through-through buffer gripper 44; stepped guide wheel 46, symmetrically arranged at both ends of the outer wall of lead screw 45, and threadedly fitted with lead screw 45; damping ring 47, snapped onto the outer wall of stepped guide wheel 46; guide ring 48, snapped onto the end face of stepped guide wheel 46 near the middle area of ​​lead screw 45, and slidably snapped onto buffer gripper 44; T-joint ring 49, symmetrically arranged at the center points of the three buffer grippers 44 in the same group;

[0106] Reference Figure 7 , Figure 8 , Figure 9 and Figure 12 It can be seen that a toothed pulley 411 is snapped onto the outer wall of the angle rod 43 away from the buffer gripper 44. A toothed belt 412 is meshed between the outer walls of the three toothed pulleys 411 in the same group. A compensating ring platform 413 is snapped onto the end face of the shaft disc 42 away from the toothed pulley 411. A gasket 414 is rotatably fitted onto the outer wall of the angle rod 43 near the shaft disc 42, and is also snapped onto the buffer gripper 44. A sealing device is symmetrically fitted onto the outer wall of the angle rod 43. The rubber ring 415 has one sealing rubber ring 415 that is snapped into the inner wall of the gasket 414, and the other sealing rubber ring 415 that is snapped into the compensating ring platform 413. The two sealing rubber rings 415 in the same group are snapped into a torsion spring 416. The sealing rubber ring 415 at the end away from the gasket 414 is snapped into a retaining ring 417 that is plugged into the compensating ring platform 413. The inner wall of the retaining ring 417 has symmetrical shaft grooves 418.

[0107] Reference Figure 7 , Figure 9 and Figure 10 It can be seen that a guide bar 421 is slidably snapped onto the inner wall of the shaft groove 418. Two guide bars 421 in the same group are snapped onto the corner ring 422 at the ends away from the retaining ring 417. A buffer cylinder 423 is coaxially set on the outside of the corner ring 422 and snapped onto the compensation ring platform 413. An angle cylinder 424 is snapped onto the middle position of the inner wall of the end of the buffer cylinder 423 away from the retaining ring 417 and is slidably snapped onto the corner cylinder 422. A telescopic spring 425 is snapped onto the buffer cylinder 423 and the angle cylinder. A support column 426 is snapped onto the end of the angle rod 43 near the buffer cylinder 423. A guide plate 427 is symmetrically snapped onto the outer wall of the support column 426. A guide column 428 that cooperates with the guide plate 427 is symmetrically snapped onto the inner wall of the angle cylinder.

[0108] Reference Figure 9 and Figure 10 It can be seen that a vertical rod 431 is snapped and installed at the end of the support column 426 away from the corner rod 43. Angle strip 432 is snapped and installed on the outer wall of the vertical rod 431. Angle beads 433 are evenly arranged in an array on the outer wall of the end of the angle strip 432 away from the axis of the vertical rod 431. The angle beads 433 and the angle strip 432 are rolled together. An angle steel ring 434 is rotatably installed in the middle position of the inner wall of the angle cylinder 424. The inner wall of the angle steel ring 434 is provided with a break groove 435.

[0109] Reference Figure 6 and Figure 10 It can be seen that the end of the vertical rod 431 away from the support column 426 is clamped and installed with an outer corner rod 441, and the outer corner rod 441 passes through the corner tube 424. The angle steel ring 434 and the inner wall of the corner tube 424 are clamped and installed with a helical spring 442. A hollow ring 443 is provided on the outside of the outer corner rod 441, which is directly opposite to it.

[0110] The T-ring 49 is snapped together with the outer wall of the cross connecting rod 36. The break groove 435 is a three-quarters annular groove. The shaft collar 41 is snapped together with the inner wall of the snap-fit ​​cylinder 32 near the insulating mounting plate 27. The limit relative movement distance between the spring snap-fit ​​shovel 314 and the end cap 37 is less than the vertical distance between the horn tube 33 and the outer corner rod 441. The vertical distance between the insulating bracket 1 and the housing 21 or the wiring board 26 is greater than the axial width of the snap-fit ​​cylinder 32.

[0111] Torsion spring 416 provides low-frequency damping to cross link 36:

[0112] The buffer grippers 44, distributed at triangular points, form a statically determinate structure. Real-time contact between the stepped guide wheel 46 and the end face of the cross link 36 ensures accurate expression of radial runout applied to the cross link 36 by external vibration sources. Furthermore, the relative movement between the stepped guide wheel 46 and the cross link 36 changes the relative angle between the stepped guide wheel 46 and the lead screw 45 in real time (when the cross link 36 experiences radial runout due to external vibration, it acts in the opposite direction on the stepped guide wheel 46, changing the relative displacement between them. Since the stepped guide wheel 46 and the lead screw 45 are threaded, under the influence of force, the stepped guide wheel 46 expresses a relative rotation angle relative to the aforementioned relative displacement). The synchronous connection between the buffer grippers 44 and the angle rod 43 transmits the kinetic energy of the aforementioned externally caused radial runout to the area of ​​the torsion spring 416 and the sealing ring 415 (the elastic properties of the torsion spring 416 and the damping properties of the rubber material itself jointly absorb, degrade, and internally dissipate the aforementioned radial runout).

[0113] During this process, the stepped guide wheel 46 and the cross connecting rod 36 undergo relative angular changes. Subsequently, under the dual guidance of the spiral groove on the outer wall of the lead screw 45 and the support and guidance of the guide ring 48, the stepped guide wheel 46 gradually moves towards both ends along the axis of the lead screw 45 (the stepped guide wheels 46 are symmetrically distributed relative to the middle position of the lead screw 45). This changes the relative contact area between the damping ring 47 on the outer wall of the stepped guide wheel 46 and the T-ring 49 (to reduce the contact area and reduce wear when the vibration amplitude is relatively small; conversely, to increase the contact area and improve the damping effect, creating a dynamic balance environment between the damping effect and the degree of wear; at the same time, the elastic damping of the sealing ring 415 can reduce the direct friction between the torsion spring 416 and the angle rod 43, reduce the spring wear rate, and improve the service life).

[0114] The purpose of the synergistic effect of the toothed pulley 411 and the toothed belt 412 is:

[0115] In practical implementation, the three toothed pulleys 411 in the same group are arranged in an equilateral triangle and share a toothed belt 412 to form a linkage structure that supports and calibrates each other. When a single corner rod 43 wears or the torsion spring 416 loses elasticity, the torsion spring 416 in the remaining position is pulled by the toothed belt 412 to force the corner rod 43 in the failed area to reset, so as to avoid the overall support imbalance caused by the performance degradation of local components.

[0116] When the relative rotation angle of the angle bar 43 exceeds a predetermined value (the angle bar 43 and the buffer gripper 44 are relatively synchronized):

[0117] The transition process from low-frequency damping support to local high-frequency nonlinear damping support (for single or multiple instantaneous external impacts exceeding the range):

[0118] Prerequisite: The current rotation angle of angle lever 43 exceeds the predetermined preset value (low-frequency and high-frequency threshold):

[0119] Under the synchronous action of the corner rod 43, the support column 426 controls the guide column 428 to continuously generate relative movement with the guide plate 427. Through the relative movement between the two, the corner ring 422, under the support and guidance of the corner cylinder 424, drives the guide bar 421 to move away from the shaft groove 418 until the two separate at the aforementioned "critical value" (for the reset process of the guide bar 421: after completing one high-frequency vibration damping of the outside, the corner ring 422, under the unidirectional force of the telescopic spring 425, controls the corner ring 422 to drive the guide bar 421 to move back to the position of the shaft groove 418 until it returns to the initial state).

[0120] During this process, the buffer cylinder 423 provides a stable support working environment for the corner cylinder 424, ensuring the assembly movement accuracy between the corner cylinder 424 and the corner ring 422, reducing the relative wear between the two, and improving their relative service life.

[0121] When the support column 426 and the angle rod 43 rotate synchronously, the angle bar 432 synchronously controls the relative angle rotation between the angle bead 433 and the break groove 435 (the angle bead 433 reduces the relative friction between the angle bar 432 and the inner wall of the break groove 435) until the angle bar 432 moves to the limit position and contacts the inner wall of the vertical section of the break groove 435. The rotation angle of the angle rod 43 exceeding the predetermined value is synchronously converted into the relative rotation between the angle steel ring 434 and the axis of the angle cylinder 424. That is, at this time, the high-frequency vibration is absorbed and buffered by the rotation and contraction of the helical spring 442. In the current state, the torsion spring 416 is in the predetermined position, that is, it does not participate in the energy absorption and degradation buffering process that "exceeds" its handling capacity.

[0122] The self-checking technical solutions for low-frequency and high-frequency vibration reduction in this application (some parts are not shown in the figure):

[0123] In practice, a gear, rack and pinion assembly, and a one-way meshing transmission structure can be installed at the end of the outer corner rod 441 away from the angle steel ring 434. The rack is supported by the hollow ring 443. The ball rods with two different colors pass through the hollow ring 443 and the fastening cylinder 32, and are connected to the rack and pinion assembly. After that, the maintenance personnel only need to observe the change of the two colors from the outside to determine whether the low-frequency or high-frequency vibration damping structure is close to the failure boundary in the current state.

[0124] The working principle of the high-precision intelligent power metering box provided by this invention is as follows: First step: First, the U-shaped groove on the end face of the insulating bracket 1 provides passage conditions to the cross connecting rod 36. The cross connecting rod 36 controls the insulating mounting plate 27 to move to the predetermined position. In specific implementation, scale marks can be added to the corresponding surfaces of the insulating mounting plate 27 and the insulating bracket 1 to create a basic environment for assembly and calibration. Then, the operator turns the fastening cylinder 32 until the fastening cylinder 32 rotates to the assembly limit between the base.

[0125] Then, the horn tube 33 is pressed to a predetermined depth by manual pressing. During this process, the spring-loaded snap shovel 314 and the end cap 37 make relative contact movement, causing the spring-loaded snap shovel 314 to make a retracting movement into the sealing groove 311 under the dual support and guidance of the sealing ring 312 and the snap ring 313. At the moment when the end cap 37 and the spring-loaded snap shovel 314 are misaligned, there is an instantaneous space clearance between the spring-loaded snap shovel 314 and the outer wall of the cross link 36. As a result, the spring-loaded snap rod moves in the opposite direction under the influence of its own elastic properties, and restricts the reset of the horn tube 33. Then, it provides a three-point layout of relative pre-tightening support in the axial direction of the cross link 36.

[0126] Furthermore, the three-point spring-locked shovel 314 provides radial support to the cross link 36, and through its own elasticity, it provides further radial buffering variables to the cross link 36, creating more complex damping bandwidth variables and reducing the probability of resonance.

[0127] The second step: Next, the torsion spring 416 provides another form of damping active support to the buffer gripper 44, thereby ensuring low-frequency shock absorption and buffering support for the radial runout of the stepped guide wheel 46 against the cross link 36. Through the elastic damping of the sealing ring 415 itself, additional shaft buffering variables are provided to the angle bar 43 while reducing the wear of the torsion spring 416, improving the coverage of the damping bandwidth, and at the same time improving the service life of the torsion spring 416.

[0128] During this process, the relative motion between the cross link 36 and the stepped guide wheel 46 changes the rotation angle of the stepped guide wheel 46 itself, causing the stepped guide wheel 46 to change the relative contact area between the stepped guide wheel 46 and the T-ring 49 under the support of the guide ring 48 and the tangential guidance of the lead screw 45. This is beneficial to improving the relative shock absorption effect on the one hand, and can reduce the relative wear between the two on the other hand.

[0129] The buffer gripper 44 is also set up with a three-point statically determinate structure (equilateral triangle layout) to achieve the same vibration reduction support for the cross link 36 in any radial degree of freedom under external vibration at any angle;

[0130] Step 3: Finally, by changing the relative rotation angle of the angle rod 43, the relative interaction depth between the guide post 428 and the guide plate 427 is changed. When the rotation angle of the angle rod 43 reaches the predetermined value, the angle ring 422 is forced to control the guide bar 421 to disengage from the shaft groove 418 under the guidance of the angle cylinder 424. At this time, the angle bar 432 rotates to the critical value in the break groove 435. When the rotation angle of the angle rod 43 exceeds the predetermined value, the angle bar 432 abuts against the inner wall of the vertical section on one side of the break groove 435, and drives the helical spring 442 to rotate under the support of the angle cylinder 424. This is to cope with the local high-frequency radial jump environment of the cross link 36 once. Thus, a multi-degree-of-freedom elastic buffer combination layout of "multiple low-frequency" plus "small amount of high-frequency vibration adaptation" is formed.

[0131] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0132] The above are merely embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A high-precision intelligent power metering box, comprising at least four insulating supports (1), arranged in pairs in a symmetrical pattern, wherein the inner wall of the vertical section at one end of the insulating support (1) is provided with symmetrically arranged U-shaped grooves, characterized in that: The insulating support (1) is provided with a main body unit (2) on the outside, and the end face of the insulating support (1) is provided with an array of elastic fastening units (3), and the elastic fastening unit (3) is provided with a multi-degree-of-freedom buffer unit inside; The multi-degree-of-freedom buffer unit includes: A collar (41) is disposed on one side of the insulating support (1) and is distributed opposite to the U-shaped groove on its surface; The shaft disc (42) is snapped onto the end of the shaft collar (41) away from the insulating bracket (1); Angle rods (43) are installed in groups of three, and are evenly inserted and rotated in a circumferential manner on the end face of the shaft disc (42); The buffer gripper (44) is snapped onto the outer wall of the angle bar (43); The lead screw (45) is rotatably fitted to the middle position of the end of the buffer gripper (44) away from the angle bar (43), and the lead screw (45) passes through the buffer gripper (44). The stepped guide wheel (46) is symmetrically arranged at both ends of the outer wall of the lead screw (45), and the stepped guide wheel (46) and the lead screw (45) are threadedly fitted together. Damping ring (47) is snapped onto the outer wall of stepped guide wheel (46); The guide ring (48) is snapped onto the end face of the stepped guide wheel (46) near the middle area of ​​the lead screw (45), and the guide ring (48) is slidably snapped onto the buffer gripper (44). T-rings (49) are symmetrically arranged at the center points of the three buffer grippers (44) in the same group.

2. The high-precision intelligent power metering box according to claim 1, characterized in that: A toothed pulley (411) is snapped onto the outer wall of the angle rod (43) away from the buffer gripper (44). A toothed belt (412) is meshed between the outer walls of the three toothed pulleys (411) in the same group. A compensation ring (413) is snapped onto the end face of the shaft disc (42) away from the toothed pulley (411). A gasket (414) is rotatably fitted onto the outer wall of the angle rod (43) near the shaft disc (42), and a sealing ring is symmetrically fitted onto the outer wall of the angle rod (43). (415), one of the sealing rings (415) is snapped into the inner wall of the gasket (414), and the other sealing ring (415) is snapped into the compensation ring platform (413). The two sealing rings (415) in the same group are snapped into a torsion spring (416). The sealing ring (415) at the end away from the gasket (414) is snapped into a retaining ring (417) that is plugged into the compensation ring platform (413). The inner wall of the retaining ring (417) is symmetrically provided with shaft grooves (418).

3. The high-precision intelligent power metering box according to claim 2, characterized in that: The inner wall of the shaft groove (418) is slidably snapped with a guide strip (421). The two guide strips (421) in the same group are snapped with a corner ring (422) at the end away from the retaining ring (417). The corner ring (422) is coaxially set with a buffer cylinder (423) snapped with the compensation ring platform (413). The middle position of the inner wall of the buffer cylinder (423) away from the retaining ring (417) is snapped with an angle cylinder (424) slidably snapped with the corner ring (422). The buffer cylinder (423) and the angle cylinder are snapped with a telescopic spring (425). The end of the angle rod (43) near the buffer cylinder (423) is snapped with a support column (426). The outer wall of the support column (426) is symmetrically snapped with a guide plate (427). The inner wall of the angle cylinder is symmetrically snapped with a guide column (428) that cooperates with the guide plate (427).

4. A high-precision intelligent power metering box according to claim 3, characterized in that: A vertical rod (431) is snapped onto the end of the support column (426) away from the corner rod (43). Angle strips (432) are snapped onto the outer wall of the vertical rod (431). Angle beads (433) are evenly arranged in an array on the outer wall of the end of the angle strip (432) away from the axis of the vertical rod (431). The angle beads (433) and the angle strips (432) are rolled together. An angle steel ring (434) is rotatably installed in the middle position of the inner wall of the angle cylinder (424). A break groove (435) is opened on the inner wall of the angle steel ring (434).

5. A high-precision intelligent power metering box according to claim 4, characterized in that: An outer corner rod (441) is snapped onto the end of the vertical rod (431) away from the support column (426), and the outer corner rod (441) passes through the corner tube (424). A helical spring (442) is snapped onto the inner wall of the corner tube (424) together with the angle steel ring (434). A hollow ring (443) is provided on the outside of the outer corner rod (441) and is directly opposite to it.

6. A high-precision intelligent power metering box according to claim 5, characterized in that: The main body unit (2) includes: The box (21) is one in number and is set outside the insulating support (1). The box (21) is snapped onto the outer wall of the insulating support near the gravity end. The control door (22) is installed on one side of the opening end of the housing (21) by means of the door hinge; The metering door (23) is installed on the other side of the opening end of the box (21) by means of the door hinge; The back panel (24) is snapped onto the end of the housing (21) facing away from the control door (22); The heat dissipation window (25) is symmetrically snapped onto both sides of the box (21), and the heat dissipation window (25) and the back plate (24) are vertically distributed; The wiring board (26) is snapped into place in the middle of the inside of the box (21) and is located between the control door (22) and the metering door; An insulating mounting plate (27) is provided, at least one, and is arranged in an array evenly between two insulating supports (1) in the same group; An insulating base plate (28) is symmetrically arranged inside the box (21), and the insulating base plate (28) is snapped together with the back plate (24); The circuit elements (29) are evenly distributed on the end face of the insulating mounting plate (27); in addition, the circuit elements (29) specifically involve: circuit breakers, terminal blocks and meters.

7. A high-precision intelligent power metering box according to claim 6, characterized in that: The elastic fastening unit (3) includes: The cap stands (31) are installed in pairs, at least in pairs, and are symmetrically snapped onto the outer wall of the vertical section of the insulating bracket (1). The inner wall of the cap stands (31) is provided with a spiral groove. In addition, the two cap stands (31) in the same group are symmetrically distributed at both ends of the insulating mounting plate (27). The snap-fit ​​sleeve (32) is threadedly installed on the inner wall of the cap stand (31); in addition, the snap-fit ​​sleeve (32) is snapped together with the inner wall of the hollow ring (443); The horn tube (33) is slidably snapped onto the middle position of the end of the snap-fit ​​tube (32) away from the insulating mounting plate (27), and the horn tube (33) passes through the snap-fit ​​tube (32). Angle ring (34) is snapped into place at the middle position of the outer wall of the horn tube (33); The return spring (35) is snapped between the inner wall of the snap-fit ​​cylinder (32) and the corner ring (34); The cross link (36) is symmetrically snapped onto both ends of the insulating mounting plate (27), and the cross link (36) is coaxial with the snap-fit ​​cylinder (32); End cap (37) is snapped onto the end of cross link (36) away from insulating mounting plate (27); The positioning ring (38) is snapped onto the outer wall of the cross link (36) near the insulating mounting plate (27); The double-sided conical ring (39) is coaxially set between the positioning ring (38) and the end cap (37) via a spring, and the double-sided conical ring (39) is slidably assembled with the outer wall of the cross connecting rod (36).

8. A high-precision intelligent power metering box according to claim 7, characterized in that: The horn tube (33) has three sealing grooves (311) circumferentially opened on the inner wall of the end near the end cap (37). A sealing ring (312) is snapped onto the inner wall of the sealing groove (311) near the axis of the end cap (37). A fastening ring (313) is provided on the side of the sealing ring (312) away from the axis of the end cap (37) and is slidably assembled with the inner wall of the sealing groove (311). A spring fastening shovel (314) is snapped onto the axis of the sealing ring (312) and is snapped onto the same fastening ring (313). The end of the spring fastening shovel (314) away from the fastening ring (313) is chamfered to match the end cap (37).

9. A high-precision intelligent power metering box according to claim 8, characterized in that: The T-ring (49) is snapped together with the outer wall of the cross link (36), the break groove (435) is a three-quarter annular groove, the shaft collar (41) is snapped together with the inner wall of the end of the buckling cylinder (32) near the insulating mounting plate (27), the limit relative movement distance between the spring buckling shovel (314) and the end cap (37) is less than the vertical distance between the horn tube (33) and the outer corner rod (441), and the vertical distance between the insulating bracket (1) and the box (21) or the wiring plate (26) is greater than the axial width of the buckling cylinder (32).

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