Bolt-free assembly type electric energy metering box

Abstract

A buckle bolt-free assembly type electric energy metering box belongs to the technical field of intelligent power distribution equipment. In order to solve the problem that single-point pressing is completed during the assembly of the metering box, the buckle is prone to loosening and breaking, and thermal expansion and cold shrinkage also affect the position of the buckle, which easily causes breakage failure and insecure clamping. The invention comprises a box front cover plate and a base arranged at the bottom of the box front cover plate. The two sides of the box front cover plate are respectively provided with side cover plates, and the opposite sides at the rear of the box front cover plate are provided with rear cover plates. The buckle clamping force can be automatically adjusted according to the outdoor environment temperature. The thermal expansion stress of the clamping structure is released through the rotation of the different bearing surfaces of the disc in a high-temperature environment, avoiding metal extrusion deformation and damage. In a low-temperature environment, the switching of the pressure surface realizes the double compression of the clamping plate and the adhering plate, compensates for the joint gap caused by metal cold shrinkage, long-term guarantees the sealing performance and clamping firmness of the box joint, and prolongs the overall service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of intelligent power distribution equipment technology, specifically to a snap-fit ​​boltless assembled power metering box. Background Technology

[0002] With the comprehensive advancement of my country's new power system and smart grid low-voltage distribution area renovation project, a large number of traditional metering boxes in urban and rural areas are being gradually replaced by standardized metering boxes adapted to smart meters and distribution area data acquisition terminals. As the carrier and protective carrier of smart metering equipment at the end of the distribution network, the assembly efficiency, outdoor structural stability, and anti-theft protection capabilities of the metering box directly determine the construction period of the intelligent transformation of the distribution area, the power grid operation and maintenance costs, and the effectiveness of line loss control.

[0003] Current electricity metering boxes rely solely on manual single-point pressing for locking during boltless assembly. This results in concentrated force and uneven clamping, making them prone to loosening of clips and widening of gaps in the box during long-term outdoor use. Disassembly and assembly require manually pressing each clip individually to unlock, which is cumbersome and time-consuming. Furthermore, the small pressing clips are thin and easily break under external impact or prolonged pressing. Thermal expansion and contraction can also affect the locking position, easily causing breakage and insecure locking. This can also lead to partial sealing failure of the box, allowing rainwater and moisture to seep into the box and damage the metering components, thus affecting the performance and lifespan of the electricity metering box.

[0004] To address the above issues, a snap-fit, boltless assembly type power metering box is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a snap-fit ​​boltless assembly type electricity metering box. By using this device, the problems mentioned above are solved, such as the single-point pressing locking during metering box assembly, which easily leads to snap-fit ​​loosening and breakage, and the thermal expansion and contraction also affecting the snap-fit ​​position, which can easily cause breakage and failure, as well as the problem of insecure locking.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a snap-fit ​​boltless assembled power metering box, comprising a front cover plate and a base disposed at the bottom of the front cover plate, side cover plates respectively disposed on both sides of the front cover plate, and a rear cover plate disposed on the opposite side of the rear of the front cover plate, a top cover disposed on the top of the front cover plate, and a door rotatably mounted on the center of the surface of the top cover plate of the front cover plate, and a module panel disposed on the surface of the rear cover plate; Both sides of the rear cover plate are fixed with side tenons. The side cover plate includes side tenons located on opposite sides of the side tenons, and the side tenons are opened on both sides of the surface of the side cover plate. The upper and lower surfaces of the side cover plate are provided with top tenons. The upper surface of the base is fixed with several bottom tenons, and the bottom surface of the top cover is fixed with several top tenons. Pulling mechanisms are installed in the middle of the surfaces of both sets of side cover plates, and adjustment mechanisms are installed at the four corners of the surfaces of both sets of side cover plates. The four corners of the inner surfaces of both sets of side cover plates are provided with snap-fit ​​mechanisms. A mounting bracket is provided on one side of the module panel and the mounting bracket is fixed to the surface of the rear cover plate. Ventilation mechanisms are provided on the inner surfaces of both sets of side cover plates.

[0007] Furthermore, the pulling mechanism includes a power seat fixed in the middle of the side cover plate surface, a rotating cylinder fixedly installed at the output end of the power seat, two sets of connecting pull ropes fixed at the upper and lower top ends of the rotating cylinder respectively, a rotating wheel provided in the middle of the connecting pull rope, a lifting rod fixed in the middle of the connecting pull rope, and one end of the connecting pull rope away from the rotating cylinder fixed to the adjustment mechanism.

[0008] Furthermore, the adjustment mechanism includes multiple sets of rotating disks rotatably mounted on the side cover plate, with one end of the connecting pull rope fixed to one side of the rotating disk. Two sets of springs are fixed inside the rotating disk, and two sets of fixing blocks are provided inside the rotating disk, with the fixing blocks fixed to the side cover plate. The two ends of the springs are respectively fixed to the rotating disk and the fixing blocks. Two sets of pressing protrusions are fixed on the outer surface of the rotating disk, and a receiving surface is provided on one side of the surface of the pressing protrusion.

[0009] Furthermore, the snap-fit ​​mechanism includes a pressing slider that is slidably mounted on the side cover plate, and two springs are fixed on both sides of the pressing slider. The pressing slider is elastically connected to the side cover plate through the two springs. Connecting pieces are fixed on both sides of the outer surface of the side cover plate, and snap-fit ​​plates are fixed on the top of the two sets of connecting pieces respectively. The snap-fit ​​plates are provided with snap-fit ​​grooves on the outside, and the snap-fit ​​grooves are opened on the top tenon.

[0010] Furthermore, a second receiving surface is provided on one side of the first receiving surface, a third receiving surface is provided on the side of the second receiving surface away from the first receiving surface, and a limit block is fixed on one side of the third receiving surface.

[0011] Furthermore, a vertical surface is provided on one side of the snap-fit ​​plate, and a pressing block is slidably disposed inside the vertical surface. Elastic sheets are fixed above and below one side of the pressing block, and the pressing block is elastically connected to the snap-fit ​​plate through the elastic sheets.

[0012] Furthermore, a sliding piece is fixed to the middle of one side of the pressing block, and the sliding piece is slidably connected to the snap-fit ​​plate. A bonding plate is fixed below one end of the sliding piece.

[0013] Furthermore, the ventilation mechanism includes several sets of fixed seats fixed on the lifting rod, and each set of fixed seats has a sealing plate fixed on one side, the sealing plate being slidably disposed on the inner surface of the side cover plate.

[0014] Furthermore, the surface of the side cover plate is provided with several sets of ventilation holes, and the number of ventilation holes corresponds to the number of sealing plates. Each set of ventilation holes is fixed with a dustproof net.

[0015] Furthermore, a brush plate is fixed to the bottom of one side of the sealing plate, and the brush plate is attached to the dustproof net.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention adopts a boltless assembly structure with mortise and tenon joints and linkage buckles. The side panels, top cover, and base of the box are quickly spliced ​​by the side tenons, bottom tenons, and top tenons, eliminating the need for bolts and welding. This significantly reduces on-site assembly and subsequent maintenance time. At the same time, the pulling mechanism on the side cover plate synchronously drives multiple sets of adjustment and locking mechanisms to pressurize and lock multiple mortise and tenon positions of the box at one time. This eliminates the defects of uneven force distribution and easy loosening and breakage of traditional single-point manual buckles. The overall box connection has higher rigidity and stronger structural stability for long-term outdoor use.

[0017] 2. This invention is equipped with a temperature and humidity sensing and linkage adaptive adjustment system, which can automatically adjust the clamping force of the buckles according to the outdoor ambient temperature. In high-temperature environments, the thermal expansion stress of the buckling structure is released by rotating the plate to different bearing surfaces, avoiding metal extrusion deformation and damage. In low-temperature environments, the pressure surface is switched to achieve double clamping of the buckling plate and the bonding plate, compensating for the splicing gaps caused by metal contraction. It automatically adapts to the thermal expansion and contraction changes of the four seasons, eliminating the need for manual adjustment of the buckle tightness, ensuring the long-term sealing of the cabinet splicing and the firmness of the buckle, and extending the overall service life of the equipment.

[0018] 3. This invention integrates a ventilation and dustproof mechanism that can be opened and closed in conjunction with the main body. Under normal and high-temperature conditions, the ventilation holes remain open, and the dustproof net enables ventilation and heat dissipation inside the box and prevents dust from entering. In rainy or low-temperature conditions, the lifting rod moves the sealing plate to close the ventilation holes, preventing rainwater and moisture from entering the box and damaging the metering components. In addition, the brush plate at the bottom of the sealing plate moves back and forth with the lifting and lowering, which can automatically clean the dust accumulated on the dustproof net and continuously maintain the heat dissipation channel. It takes into account the multiple protection needs of outdoor box heat dissipation, waterproofing and dustproofing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the partially separated three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the rear cover and side cover of the present invention. Figure 4 This is a cross-sectional three-dimensional structural diagram of the side cover plate of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 7 This is a cross-sectional perspective view of the three-dimensional structure of the snap-fit ​​plate of the present invention when it is not compressed; Figure 8 This is a three-dimensional structural diagram of the bonding sealing plate of the present invention, viewed from below.

[0020] In the diagram: 1. Front cover of the box; 2. Base; 3. Side cover; 31. Side tenon; 32. Top tenon; 4. Rear cover; 5. Top cover; 6. Pulling mechanism; 61. Power seat; 62. Rotating cylinder; 63. Connecting pull rope; 64. Rotating wheel; 65. Lifting rod; 7. Adjusting mechanism; 71. Rotating disc; 72. Spring 1; 73. Fixing block; 74. Extrusion protrusion; 75. Bearing surface 1; 76. Bearing surface 2; 77. Bearing surface 3; 78. Limiting block; 8. Lock 81. Connecting mechanism; 82. Pressing slider; 83. Spring II; 84. Connecting piece; 85. Snap-fit ​​plate; 86. Snap-fit ​​groove; 87. Vertical surface; 88. Pressing block; 89. Elastic piece; 810. Sliding piece; 91. Adhesive plate; 92. Ventilation mechanism; 93. Fixing base; 94. Adhesive sealing plate; 10. Brush plate; 20. Dustproof net; 21. Mounting bracket; 32. Bottom tenon; 43. Top tenon; 54. Side tenon; 65. Box door; 76. Ventilation hole; 87. Module panel. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To address the technical issue of latches easily becoming loose or breaking when locking the metering box by pressing at a single point during assembly, the following preferred technical solution is provided: like Figure 1 , Figure 2 and Figure 7As shown, a snap-fit, boltless assembly type electricity metering box includes a front cover plate 1 and a base 2 located at the bottom of the front cover plate 1. Side cover plates 3 are respectively provided on both sides of the front cover plate 1, and a rear cover plate 4 is provided on the opposite side behind the front cover plate 1. A top cover 5 is provided on the top of the front cover plate 1, and a door 50 is rotatably installed in the center of the surface of the top cover 5. After subsequent assembly, the front cover plate 1, door 50, base 2, side cover plates 3, rear cover plate 4, and top cover 5 can... It can form a complete power metering box for power distribution. The surface of the rear cover plate 4 is equipped with a module panel 70. The module panel 70 has reserved existing standardized installation frames and wiring slots. It can be directly equipped with power distribution function modules such as smart energy meters, carrier acquisition modules, circuit breakers, and terminals of State Grid standard power metering, so as to realize normal control of reactive power loss, eliminate leakage power consumption, suppress no-load power consumption, optimize load distribution, directly realize power saving, and can be adapted to existing smart grid applications and smart metering scenarios. Both sides of the rear cover plate 4 are fixed with side tenons 40. The side cover plate 3 includes side tenons 31 set on the opposite side of the side tenons 40. The side tenons 31 are opened on both sides of the surface of the side cover plate 3. The upper and lower surfaces of the side cover plate 3 are provided with top tenons 32. The upper and lower surfaces of the rear cover plate 4 and the front cover plate 1 of the box are also provided with tenons with the same structure as the top tenons 32, for subsequent tenon and mortise insertion assembly. The upper surface of the base 2 is fixed with several bottom tenons 20. The number and position of the bottom tenons 20 correspond to the tenons at the bottom of the rear cover plate 4, the front cover plate 1 of the box and the side cover plate 3. First, the four sides of the left and right side cover plates 3, the rear cover plate 4 and the front cover plate 1 of the box are tenoned together with the side tenons 40 and the side tenons 31. Then, the four sides are vertically tenoned and assembled onto the base 2. Several top tenons 30 are fixed on the bottom surface of the top cover 5. After the side cover plates 3, the front cover plate 1 and the rear cover plate 4 of the box are vertically assembled onto the base 2, the top tenons 30 are finally used to mortise and tenon joint with the top tenons on the four sides, thereby completing the assembly of the entire box. There is no need for traditional fasteners such as bolts and welding, which can greatly simplify the on-site assembly process, save tedious operations such as drilling, tightening bolts and welding, shorten production and installation time, reduce the difficulty of manual assembly and later maintenance and replacement, and the use of mortise and tenon joint for assembly can also make the assembly firmness, sealing and stability better, which can be adapted to the assembly of State Grid standard smart metering equipment and meet the application needs of smart grid power metering, power saving management and other applications. A pulling mechanism 6 is installed in the center of the surface of each of the two sets of side cover plates 3, and an adjusting mechanism 7 is installed at each of the four corners of the surface of each of the two sets of side cover plates 3. A locking mechanism 8 is provided at each of the four corners of the inner surface of each of the two sets of side cover plates 3. According to the above, after the entire box is assembled, the pulling mechanism 6 can simultaneously pull multiple adjusting mechanisms 7 to rotate on the side cover plates 3. Thus, by utilizing the rotation of the multiple adjusting mechanisms 7, multiple locking mechanisms 8 can be respectively locked into the bottom tenon 20, top tenon 30, and side tenon 40. Therefore, after the box is assembled using mortise and tenon joints, the side cover plates 3 on both sides can be respectively locked into place by the locking mechanisms 8. The four adjacent sides are fixed by a snap-fit ​​secondary snap-fit, thereby improving the overall fixing strength of the box after assembly. This better meets the application requirements of smart grid power metering, energy saving and management. At the same time, the snap-fit ​​mechanism 8 is automatically controlled by the pulling mechanism 6 and the adjusting mechanism 7 to form a larger active fitting and pressure snap-fit ​​structure, rather than the existing through hole extrusion snap-fit. It can complete the snap-fit ​​locking of multiple tenon and mortise positions at one time. The larger snap-fit ​​structure has higher strength, which can greatly improve the overall connection rigidity of the box. The active fitting and pressure snap-fit ​​will not break easily, making it suitable for stable operation in outdoor smart metering scenarios. A mounting bracket 10 is provided on one side of the module panel 70, and the mounting bracket 10 is fixed to the surface of the rear cover plate 4. Ventilation mechanisms 9 are provided on the inner surfaces of both sets of side cover plates 3. A conventional temperature sensor and a humidity sensor are installed sequentially from top to bottom on the mounting bracket 10, and the conventional temperature sensor and humidity sensor are connected to the power module and control module on the module panel 70. When the enclosure is operating in a high-temperature outdoor summer environment, if the temperature sensor detects that the surface temperature of the metal material of the rear cover plate 4 is higher than the normal threshold, the control module will cause the pulling mechanism 6 to pull the adjusting mechanism 7, causing the adjusting mechanism 7 to rotate at a specific angle. At this time, the adjusting mechanism 7 will appropriately relax the pressure on the locking mechanism 8, allowing the pressure-type locking of the locking mechanism 8 to be appropriately relaxed, thus releasing... The metal sheet of the snap-fit ​​mechanism 8 is designed to withstand thermal expansion stress, preventing deformation or damage to the snap-fit ​​and tenon joints due to overload. Additionally, in low-temperature winter environments, if the temperature sensor detects that the surface temperature of the metal material of the rear cover plate 4 is below the normal threshold, the control module will also cause the pulling mechanism 6 to pull the adjusting mechanism 7, allowing the adjusting mechanism 7 to rotate at a specific angle. At this time, the adjusting mechanism 7 will increase the pressure on the snap-fit ​​mechanism 8, enhancing its snap-fit ​​effect and compensating for poor contact caused by metal cold contraction. This ensures the firmness of each snap-fit ​​position in the cabinet and the tight fit of the spliced ​​surfaces, thus extending the service life of the entire cabinet and snap-fit ​​assembly structure. No manual disassembly and adjustment of the snap-fit ​​tightness is required depending on the season, making it suitable for long-term stable operation of unattended outdoor intelligent metering systems.

[0023] like Figure 3 and Figure 4As shown, the pulling mechanism 6 includes a power base 61 fixed in the middle of the surface of the side cover plate 3. The power base 61 is a small servo motor with a self-locking function and is controlled by the control module inside the box. A rotating cylinder 62 is fixedly installed at the output end of the power base 61. The power base 61 can drive the rotating cylinder 62 to rotate. Two sets of connecting pull ropes 63 are fixed at the top and bottom of the rotating cylinder 62, respectively. A rotating wheel 64 is set in the middle of the connecting pull rope 63. The rotating wheel 64 serves as the support angle for the connecting pull rope 63. A lifting rod 65 is fixed in the middle of the connecting pull rope 63. One end of the connecting pull rope 63 away from the rotating cylinder 62 is fixed to the adjustment mechanism 7. The connecting pull rope 63 is in a taut state. When the power base 61 drives the rotating cylinder 62 to rotate clockwise, it can pull the multiple sets of connecting pull ropes 63 at the top and bottom of the rotating cylinder 62, thereby allowing the connecting pull ropes 63 to pull the adjustment mechanism 7 to rotate for subsequent adjustment processing.

[0024] like Figures 3-7 As shown, the adjustment mechanism 7 includes multiple sets of rotating disks 71 rotatably mounted on the side cover plate 3, and one end of the connecting pull rope 63 is fixed to one side of the rotating disk 71. Two sets of springs 72 are fixed inside the rotating disk 71. The springs 72 are set in the arc grooves opened on the surface of the rotating disk 71. Two sets of fixing blocks 73 are set inside the rotating disk 71, and the fixing blocks 73 are fixed on the side cover plate 3. The fixing blocks 73 are slidably connected to the arc grooves on the rotating disk 71. The two ends of the springs 72 are respectively fixed on the rotating disk 71 and the fixing blocks 73. Two sets of pressing protrusions 74 are fixed on the outer surface of the rotating disk 71. One side of the surface of the pressing protrusions 74 is provided with a bearing surface 75. When the rotating disk 71 is pulled and rotated, the rotating disk 71 will rotate relative to the fixing blocks 73 and compress the springs 72. At the same time, the rebound force of the springs 72 can also make the rotating disk 71 rotate back to its original position. The rebound force of the springs 72 is greater than the resistance of the rotating disk 71 to rotate back to its original position, ensuring that the rotating disk 71 can effectively rotate back to its original position. The snap-fit ​​mechanism 8 includes a pressing slider 81 slidably mounted on the side cover plate 3, and springs 82 are fixed on both sides of the pressing slider 81. The pressing slider 81 is elastically connected to the side cover plate 3 through the springs 82. When the pressing slider 81 is pressed, it will compress the springs 82, allowing the springs 82 to store elastic potential energy, so as to facilitate the reset of the pressing slider 81. The elastic force of the springs 82 is greater than the resistance when the pressing slider 81 is reset, so as to ensure the effective reset of the pressing slider 81. Connecting pieces 83 are fixed on both sides of the outer surface of the side cover plate 3, and snap-fit ​​plates 84 are fixed on the top of the two sets of connecting pieces 83 respectively. The connecting pieces 83 are made of oxidation-resistant rubber material with a certain deformability, so that the snap-fit ​​plates 84 have the ability to rotate by utilizing the connecting pieces 83. The snap-fit ​​plates 84 are provided with snap-fit ​​grooves 85 on the outside, and the snap-fit ​​grooves 85 are opened on the top tenon 30. As described above, once the entire housing is assembled, the rotating cylinder 62 rotates clockwise, which uses multiple sets of connecting ropes 63 to synchronously pull multiple sets of rotating disks 71 to rotate at a certain angle. The synchronous rotation of the multiple sets of rotating disks 71 and the pressing protrusions 74 allows for the pressing of the pressing slider 81, compressing the spring 82. At this time, the receiving surface 75 presses against the bottom of the pressing slider 81. When the multiple sets of pressing sliders 81 extend under pressure, they press the locking plate 84 outwards, ultimately causing the locking plate 84 to fit snugly into the locking groove 85, forming a... Figure 7 The status displayed in the middle becomes Figure 6 The state shown in the figure is used to complete the snap-fit ​​plates 84 of the multiple sets of plates 84 being snapped into the multiple sets of snap-fit ​​grooves 85 opened on the bottom tenon 20, top tenon 30 and side tenon 40 respectively; After the enclosure is assembled using mortise and tenon joints, the side cover plates 3 on both sides expand and engage under the pressure of the snap-fit ​​plate 84, which can be used to perform secondary snap-fit ​​fixation between the four adjacent surfaces. This improves the overall fixing strength of the enclosure after assembly and better meets the application requirements of smart grid power metering and energy-saving management. At the same time, the expansion and engagement of the snap-fit ​​plate 84 by the squeezing slider 81 is automatically controlled by the pulling mechanism 6 and the adjusting mechanism 7. It can be designed as a larger active fitting and pressure snap-fit ​​structure, which can simultaneously complete the snap-fit ​​locking of multiple mortise and tenon positions. The larger snap-fit ​​structure has higher strength, which can significantly improve the overall connection rigidity of the enclosure. Moreover, the active fitting and pressure snap-fit ​​allows the snap-fit ​​plate 84 to directly extend into the snap-fit ​​groove 85 during assembly, making assembly more convenient and without resistance. The snap-fit ​​plate 84 will not be squeezed at the entrance of the snap-fit ​​groove 85 when it extends in, so that the snap-fit ​​plate 84 will not easily break and is more effectively adapted to the stable and long-term operation of outdoor smart metering scenarios.

[0025] To address the technical problems of thermal expansion and contraction affecting the snap-fit ​​position, easily leading to breakage and insecure engagement, the following preferred technical solutions are provided: like Figures 4-6 As shown, a second receiving surface 76 is provided on one side of the receiving surface 75. The second receiving surface 76 is slightly lower than the first receiving surface 75. A third receiving surface 77 is provided on the side of the second receiving surface 76 away from the first receiving surface 75. The third receiving surface 77 is slightly higher than the first receiving surface 75. The first receiving surface 75, the second receiving surface 76 and the third receiving surface 77 are all connected by inclined surfaces, so that the first receiving surface 75, the second receiving surface 76 and the third receiving surface 77 can respectively squeeze the extrusion slider 81 to different degrees, thereby carrying out subsequent adjustment work. A limit block 78 is fixed on one side of the third receiving surface 77. The limit block 78 can prevent the extrusion slider 81 from falling off the third receiving surface 77. As described above, when the enclosure is operating in a high-temperature outdoor summer environment, if the temperature sensor detects that the surface temperature of the metal material of the rear cover plate 4 is higher than the normal threshold, the control module will cause the power seat 61 to continue to rotate the rotating cylinder 62 clockwise by a specific angle, so that the connecting rope 63 will continue to pull the rotating disk 71 to rotate, and finally let the bearing surface 76 press and support the pressing slider 81. At this time, the pressing slider 81 will retract appropriately under the rebound of the spring 82, so that the pressing and locking of the snap-fit ​​plate 84 will be appropriately relaxed. In this way, the thermal expansion stress of the metal plate of the snap-fit ​​plate 84 can be released at high temperatures, and the pressure transmission of the snap-fit ​​plate 84 to the top tenon 30 can be reduced, avoiding the problem of deformation or damage of the snap-fit ​​and tenon parts due to overload.

[0026] like Figure 6 As shown, a vertical surface 86 is provided on one side surface of the snap-fit ​​plate 84. When the rotating disk 71 is pulled and rotated, causing the pressing slider 81 to be pressed by the receiving surface 75, the vertical surface 86 will be set vertically downward. The two sides of the pressing slider 81 are located below the vertical surface 86. A pressing block 87 is slidably provided inside the vertical surface 86, and an elastic sheet 88 is fixed above and below one side of the pressing block 87. The pressing block 87 is elastically connected to the snap-fit ​​plate 84 through the elastic sheet 88. A sliding piece 89 is fixed to the middle of one side of the pressing block 87, and the sliding piece 89 is slidably connected to the snap-fit ​​plate 84. A bonding plate 810 is fixed to the lower end of one end of the sliding piece 89. The bonding plate 810 is made of anti-slip and high-temperature resistant rubber. According to the above, when working in a low-temperature environment in winter, if the temperature sensor detects that the surface temperature of the metal material of the rear cover plate 4 is lower than the normal threshold, the control module will also cause the power seat 61 to continue to rotate the rotating cylinder 62 clockwise by a specific angle, so that the connecting rope 63 will continue to pull the rotating disk 71 to rotate, and finally let the bearing surface 77 press and support the extrusion slider 81, so that the extrusion... The sliding block 81 will continue to extend along the vertical plane 86 and press the pressing block 87. At this time, the pressing block 87 will push the sliding piece 89, causing the bonding plate 810 to move down and press against the inner surface of the snap-fit ​​groove 85. This allows the bonding plate 810 and the snap-fit ​​plate 84 to cooperate for double pressure snap-fit, which makes up for the poor contact problem caused by the cold shrinkage of the snap-fit ​​plate 84 at low temperatures. This ensures the firmness of each snap-fit ​​position of the cabinet and the tight fit of the splicing surfaces, thereby helping to extend the service life of the entire cabinet and the snap-fit ​​assembly structure. At the same time, there is no need for manual disassembly and adjustment of the snap-fit ​​tightness according to the season, making it suitable for the long-term stable operation of outdoor unattended intelligent power distribution metering.

[0027] To address the technical problem of rainwater and moisture easily entering the chamber through gaps and damaging the metering components, the following preferred technical solution is provided: like Figure 3 , Figure 4 and Figure 8As shown, the ventilation mechanism 9 includes several sets of fixed seats 91 fixed on the lifting rod 65, and each set of fixed seats 91 has a sealing plate 92 fixed on one side. The sealing plate 92 is slidably disposed on the inner surface of the side cover plate 3. The sealing plate 92 can move on the inner surface of the side cover plate 3 according to the movement of the lifting rod 65. The surface of the side cover plate 3 has several sets of ventilation holes 60, and the number of ventilation holes 60 corresponds to the number of sealing plates 92. Each set of ventilation holes 60 is fixed with a dustproof net 94. The dustproof net 94 can reduce dust entering the box when the ventilation holes 60 are dissipating heat and ventilating. According to the above, when the connecting rope 63 and the lifting rod 65 are pulled under normal conditions and high temperature conditions, the movement of the sealing plate 92 will not cover the ventilation holes 60, so that the ventilation holes 60 can ventilate and dissipate heat normally. However, when the external environment is continuously raining and the humidity sensor on the mounting bracket 10 detects an increase in humidity inside the box, or when the environment is in the low temperature environment mentioned above, the ventilation holes 60 can still ventilate and dissipate heat. When the connecting rope 63 continues to pull the rotating disk 71 to rotate, the bearing surface 77 will press and support the squeezing slider 81. At this time, the tension of the lifting rod 65 will cause the lifting rod 65 to move and cover the vent 60. At the same time, the bonding plate 810 and the snap-fit ​​plate 84 will also be in a double squeezing state. Thus, when it rains and the humidity increases, the vent 60 can be sealed to prevent rainwater and moisture from having an adverse effect on the instruments and equipment inside the box. At the same time, the double squeezing and snap-fit ​​can also improve the tightness of the assembly to ensure the sealing and prevent moisture or rainwater from entering from the assembly gaps. This is conducive to improving the long-term stable operation of outdoor intelligent power distribution metering. A brush plate 93 is fixed to the bottom of one side of the sealing plate 92, and the brush plate 93 is attached to the dustproof net 94. As described above, when the sealing plate 92 moves to cover the ventilation hole 60, the brush plate 93 will slide over the dustproof net 94, which is beneficial for cleaning the impurities and dust attached to the dustproof net 94. At the same time, it can also be controlled to periodically slide the brush plate 93 over the dustproof net 94 and then reset it. In this way, when the main metering box is used for a long time, the ventilation hole 60 can maintain good ventilation and heat dissipation effect, thereby improving the long-term effect of the box in outdoor intelligent power distribution metering.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A snap-fit ​​boltless assembled power metering box, comprising a front cover plate (1) and a base (2) disposed at the bottom of the front cover plate (1), characterized in that: The front cover plate (1) of the box is provided with side cover plates (3) on both sides, and a rear cover plate (4) is provided on the opposite side behind the front cover plate (1). A top cover (5) is provided on the top of the front cover plate (1), and a box door (50) is rotatably installed in the middle of the surface of the top cover (5) on the top of the front cover plate (1). A module panel (70) is installed on the surface of the rear cover plate (4). The rear cover plate (4) is fixed with side tenons (40) on both sides. The side cover plate (3) includes side tenons (31) on the opposite side of the side tenons (40). The side tenons (31) are opened on both sides of the surface of the side cover plate (3). The upper and lower surfaces of the side cover plate (3) are provided with top tenons (32). The upper surface of the base (2) is fixed with several bottom tenons (20). The bottom surface of the top cover (5) is fixed with several top tenons (30). Pulling mechanisms (6) are installed in the middle of the surface of the two sets of side cover plates (3). Adjustment mechanisms (7) are installed at the four corners of the surface of the two sets of side cover plates (3). Snap-fit ​​mechanisms (8) are provided at the four corners of the inner surface of the two sets of side cover plates (3). A mounting bracket (10) is provided on one side of the module panel (70). The mounting bracket (10) is fixed on the surface of the rear cover plate (4). Ventilation mechanisms (9) are provided on the inner surface of the two sets of side cover plates (3).

2. The snap-fit ​​boltless assembly type power metering box according to claim 1, characterized in that: The pulling mechanism (6) includes a power seat (61) fixed in the middle of the surface of the side cover plate (3). A rotating cylinder (62) is fixedly installed at the output end of the power seat (61). Two sets of connecting pull ropes (63) are fixed at the top and bottom of the rotating cylinder (62), and a rotating wheel (64) is provided in the middle of the connecting pull rope (63). A lifting rod (65) is fixed in the middle of the connecting pull rope (63), and one end of the connecting pull rope (63) away from the rotating cylinder (62) is fixed on the adjusting mechanism (7).

3. The snap-fit ​​boltless assembly type power metering box according to claim 2, characterized in that: The adjustment mechanism (7) includes multiple sets of rotating disks (71) rotatably mounted on the side cover plate (3), and one end of the connecting rope (63) is fixed to one side of the rotating disk (71). Two sets of springs (72) are fixed inside the rotating disk (71). Two sets of fixing blocks (73) are provided inside the rotating disk (71), and the fixing blocks (73) are fixed on the side cover plate (3). The two ends of the springs (72) are respectively fixed on the rotating disk (71) and the fixing blocks (73). Two sets of extrusion protrusions (74) are fixed on the outer surface of the rotating disk (71). A receiving surface (75) is provided on one side of the surface of the extrusion protrusions (74).

4. The snap-fit ​​boltless assembly type power metering box according to claim 1, characterized in that: The snap-fit ​​mechanism (8) includes a pressing slider (81) slidably mounted on the side cover plate (3), and springs (82) are fixed on both sides of the pressing slider (81). The pressing slider (81) is elastically connected to the side cover plate (3) through the springs (82). Connecting pieces (83) are fixed on both sides of the outer surface of the side cover plate (3), and snap-fit ​​plates (84) are fixed on the top of the two sets of connecting pieces (83). Snap-fit ​​grooves (85) are provided on the outside of the snap-fit ​​plates (84), and the snap-fit ​​grooves (85) are opened on the top tenon (30).

5. A snap-fit ​​boltless assembly type power metering box according to claim 3, characterized in that: A second receiving surface (76) is provided on one side of the first receiving surface (75), and a third receiving surface (77) is provided on the side of the second receiving surface (76) away from the first receiving surface (75). A limit block (78) is fixed on one side of the third receiving surface (77).

6. A snap-fit ​​boltless assembly type power metering box according to claim 4, characterized in that: A vertical surface (86) is provided on one side surface of the snap-fit ​​plate (84), and a pressing block (87) is slidably provided inside the vertical surface (86). An elastic sheet (88) is fixed above and below one side of the pressing block (87), and the pressing block (87) is elastically connected to the snap-fit ​​plate (84) through the elastic sheet (88).

7. A snap-fit ​​boltless assembled power metering box according to claim 6, characterized in that: A sliding piece (89) is fixed in the middle of one side of the pressing block (87), and the sliding piece (89) is slidably connected to the snap-fit ​​plate (84). A bonding plate (810) is fixed below one end of the sliding piece (89).

8. A snap-fit ​​boltless assembly type power metering box according to claim 2, characterized in that: The ventilation mechanism (9) includes several sets of fixed seats (91) fixed on the lifting rod (65), and each set of fixed seats (91) has a sealing plate (92) fixed on one side, and the sealing plate (92) is slidably disposed on the inner surface of the side cover plate (3).

9. A snap-fit ​​boltless assembly type power metering box according to claim 8, characterized in that: The surface of the side cover plate (3) is provided with a number of ventilation holes (60), and the number of ventilation holes (60) corresponds to the number of sealing plates (92). Each group of ventilation holes (60) is fixed with a dustproof net (94).

10. A snap-fit ​​boltless assembly type power metering box according to claim 9, characterized in that: A brush plate (93) is fixed to one side of the bottom of the sealing plate (92), and the brush plate (93) is attached to the dustproof net (94).

Images