A smart metering box

Abstract

This invention relates to the field of power metering box technology, specifically an intelligent metering box, comprising a box body with an installation opening at the front end and an annular sliding cavity extending in the front-to-back direction inside the side wall of the box body; a sliding support frame that can move back and forth is slidably fitted inside the annular sliding cavity; by setting the sliding support frame in conjunction with a temperature-sensing telescopic drive structure, the sliding support frame can automatically move back and forth along the annular sliding cavity according to the temperature changes inside and outside the box, realizing dynamic adjustment of the ventilation area with temperature; at high temperatures, the sliding support frame extends outward, increasing the ventilation volume and forming a hollow air insulation interlayer, effectively blocking the conduction of external heat from the sun to the inside of the box body; at low temperatures, it automatically retracts, narrowing the ventilation channel, reducing the entry of cold air from the outside, preventing condensation and frost, significantly improving the adaptability of the internal environment of the box body, and extending the service life of the metering equipment.

Description

Technical Field

[0001] This invention relates to the field of power metering box technology, and specifically to an intelligent metering box. Background Technology

[0002] Electricity metering boxes are used to house electricity meters, data acquisition terminals, wiring terminals, and other electricity metering components. They are widely deployed in outdoor poles, factory outdoor areas, and distribution points in transformer substations. Large-capacity centralized metering boxes integrate multiple metering devices, generating a large amount of heat. They are subjected to high temperatures, dust, rain condensation, and alternating day and night temperature differences over long periods. The internal temperature, humidity, and dust accumulation directly determine the metering accuracy and the lifespan of the equipment. Currently published related patents, such as CN120414319A, CN114725805A, and CN117578204A, have made corresponding improvements to the heat dissipation and dustproof structure of outdoor metering boxes. However, existing technical solutions still have the common problem of difficulty in balancing ventilation and heat dissipation with long-term dustproofing, making them unsuitable for long-term unattended scenarios. Traditional metering boxes have a fixed ventilation structure with fixed openings and fixed louvers. The ventilation area is not adjustable and cannot automatically change the ventilation volume according to the real-time temperature inside the box. In the high temperature environment of summer, the air intake of the fixed ventilation channel is insufficient, and the heat inside the box cannot be dissipated quickly. The continuous high temperature operation of the metering components will cause failures such as metering deviation, communication interruption, and insulation aging. To prevent debris such as willow catkins, fallen leaves, and insects from entering the metering box, most existing metering boxes are equipped with fixed dustproof nets at the ventilation openings. Over time, large particles like willow catkins easily accumulate on the surface of these nets, eventually blocking the ventilation channels, significantly reducing the box's heat dissipation efficiency, and potentially causing high-temperature malfunctions. Existing products lack an automatic unclogging mechanism, relying solely on maintenance personnel to periodically open the boxes and manually wash and scrape away debris from the filters. Outdoor, dispersed metering boxes are numerous and scattered, resulting in a large workload for manual inspection and cleaning, leading to high maintenance costs. If the cleaning cycle is delayed, filter clogging and dust accumulation inside the box will continue to worsen, significantly reducing the lifespan of the metering equipment. Therefore, a smart metering box is proposed that can automatically and dynamically adjust the ventilation volume based on the internal temperature and simultaneously perform automatic dustproof filter cleaning, reducing overall maintenance costs and improving the operational stability and environmental adaptability of the metering equipment. Summary of the Invention

[0003] To address the problems in existing technologies, this invention provides an intelligent metering box that can automatically and dynamically adjust the ventilation air intake based on the internal temperature, and simultaneously perform automatic dust filter cleaning, thereby reducing the overall lifecycle maintenance cost and improving the operational stability and environmental adaptability of metering equipment.

[0004] The technical solution adopted by this invention to solve its technical problem is an intelligent metering box, including a box body, an installation opening at the front end of the box body, and an annular sliding cavity extending in the front-to-back direction inside the side wall of the box body; a sliding support frame that can move back and forth is slidably assembled inside the annular sliding cavity; a temperature-sensing telescopic drive structure is provided between the sliding support frame and the cavity wall of the annular sliding cavity; an installation frame is fixedly provided on both sides of the sliding support frame, and a ventilation filter assembly is assembled on the installation frame, the ventilation filter assembly including a rotatable annular filter body; an avoidance groove corresponding to the installation frame is provided in the annular sliding cavity; a power-accumulating filter cleaning mechanism is provided inside the installation frame; the power-accumulating filter cleaning mechanism elastically accumulates power through the reciprocating linear motion of the sliding support frame, and when the accumulated power reaches a set damping threshold, it releases power to drive the annular filter body to rotate; the power-accumulating filter cleaning mechanism is equipped with a cleaning actuator that fits against the annular filter body.

[0005] Specifically, the temperature-sensing telescopic drive structure includes several horizontal sealed cylinders, which are fixedly embedded in a sliding support frame. A movable plate is installed inside the sealed cylinder in a sealed sliding assembly. A horizontally arranged drive rod is fixedly connected to the side of the movable plate facing the inner wall of the annular sliding cavity. The end of the drive rod away from the movable plate passes through the sealed cylinder and is fixedly connected to the inner wall of the annular sliding cavity through a connecting seat. A thermally expanding fluid is sealed between the side of the movable plate away from the drive rod and the inner wall of the sealed cylinder. A return spring is fixedly connected between the end of the movable plate near the drive rod and the inner wall of the sealed cylinder. The lower end of the sliding support frame is provided with several sets of horizontally arranged positioning holes, and the inner wall of the annular sliding cavity is fixedly connected with guide rods that slide in cooperation with the positioning holes.

[0006] Specifically, the mounting frame has a through mounting slot, and the upper and lower ends of the mounting slot are respectively rotatably connected to a first drive shaft and a second drive shaft. A drive roller and a driven roller are respectively mounted on the first drive shaft and the second drive shaft. The annular filter body is assembled around the outside of the drive roller and the driven roller. The first drive shaft has a transmission opening on the side facing the inner wall of the annular sliding cavity. The inner wall of the transmission opening is formed with a spiral guide groove. An extrusion rod is inserted inside the transmission opening. A guide block is formed on the extrusion rod that slides with the spiral guide groove. The outer side of the sliding support frame is provided with a sliding hole that communicates with the transmission opening. One end of the extrusion rod passes through the sliding hole and is rotatably connected to the inner wall of the annular sliding cavity through the first one-way bearing.

[0007] Specifically, the accumulator filter cleaning mechanism includes an accumulator housing rotatably mounted on the end of the first drive shaft away from the first one-way bearing. The accumulator housing is integrally embedded and fixedly installed on the inner wall of the sliding support frame. A spiral torsion spring is installed inside the accumulator housing, and the two ends of the spiral torsion spring are respectively connected to the accumulator housing and the first drive shaft. The first drive shaft is connected in sequence to the second one-way bearing, the transmission rod, and the friction wheel at the end near the power storage housing. The friction housing is embedded and fixedly installed in the inner wall of the sliding support frame. The friction wheel is rotated and assembled inside the friction housing, and the outer circumferential surface of the friction wheel forms a friction transmission engagement with the inner wall of the friction housing.

[0008] Specifically, a horizontally arranged cleaning rod is fixedly connected to the upper inner side of the mounting frame, and the end face of the cleaning rod facing the annular filter body is pressed and adhered to the outer surface of the annular filter body.

[0009] Specifically, the power-operated filter cleaning mechanism also includes a horizontally arranged drive shaft, which is rotatably mounted on the inner side of the lower end of the mounting frame. A cleaning roller is fixedly connected to the drive shaft. First drive wheels are fixedly mounted at both ends of the drive shaft, and second drive wheels are fixedly mounted at both ends of the second drive shaft. The first drive wheels and the second drive wheels are driven by a drive belt. The mounting frame is provided with mounting cavities corresponding to the first drive wheels, the second drive wheels, and the drive belt.

[0010] Specifically, foldable elastic airbags are fixedly connected to the inner sides of both the upper and lower ends of the annular sliding cavity, and an air tank is fixedly installed on the top of the box. One end of the foldable elastic airbag is fixedly connected to the inner wall of the annular sliding cavity, and the other end is fixedly connected to the side wall of the sliding support frame. The foldable elastic airbag is equipped with a one-way inlet valve and a one-way outlet valve. The one-way inlet valve is connected to the outside air, and the one-way outlet valve is connected to the air tank through a pipeline. Multiple horizontally arranged jet cleaning pipes are fixedly connected to the inner wall of the box, and multiple sets of downwardly inclined cleaning nozzles are opened on the outer wall of the jet cleaning pipes. A delayed pressure relief valve is installed at the outlet end of the air tank, and the air tank is connected to the jet cleaning pipe pipeline through the delayed pressure relief valve.

[0011] Specifically, a sealing strip is fixedly connected to the inner wall around the annular sliding cavity, and the sealing strip slides and presses against the outer wall of the sliding support frame.

[0012] Specifically, a ventilation plate is fixedly connected in the mounting groove between the first drive shaft and the second drive shaft, and the ventilation plate has several sets of vents that are inclined towards the lower outer side of the housing.

[0013] Specifically, the sliding support frame is hinged to the assembly box door on the side closest to the installation opening.

[0014] The beneficial effects of this invention are: The intelligent metering box of this invention, through the combination of a sliding support frame and a temperature-sensing telescopic drive structure, allows the sliding support frame to automatically move back and forth along the annular sliding cavity according to the temperature changes inside and outside the box, realizing dynamic adjustment of the ventilation area with temperature; at high temperatures, the sliding support frame extends outward to increase the ventilation volume and form a hollow air insulation layer, effectively blocking the conduction of external heat from the sun to the inside of the box; at low temperatures, it automatically retracts to narrow the ventilation channel, reduce the entry of cold air from the outside, prevent condensation and frost, significantly improve the adaptability of the internal environment of the box, and extend the service life of the metering equipment; The intelligent metering box described in this invention features a power-accumulating filter cleaning mechanism. This mechanism utilizes the repeated reciprocating linear motion of the sliding support frame, caused by day-night temperature differences and temperature variations within the box, as the driving force. This continuously accumulates elastic mechanical energy for the volute torsion spring. When the accumulated energy reaches a set damping threshold, the power is released instantaneously, driving the annular filter body to rotate at high speed. This, combined with the cleaning actuator, completes a comprehensive switch and deep cleaning of the filter's working surface in one operation. No external power supply or manual operation is required, effectively solving the problem of long-term dust accumulation and blockage leading to heat dissipation failure in fixed dustproof nets. This significantly reduces the maintenance costs of manual inspection and cleaning of outdoor decentralized metering boxes. The intelligent metering box of this invention is equipped with a foldable elastic airbag, an air tank, and a jet cleaning pipe. The mechanical energy generated by the reciprocating sliding of the sliding support frame drives the foldable elastic airbag to continuously pump air, storing high-pressure gas in the air tank. When the air pressure in the air tank reaches the preset threshold of the delayed pressure relief valve, it is automatically released. The high-pressure airflow is then directed outward through the jet cleaning pipe and cleaning nozzle arranged on the inner wall of the box to blow the internal space of the box and blow the deposited dust towards the annular filter body. At the same time, the high-pressure airflow penetrates the annular filter body to form a reverse flushing effect, effectively washing away stubborn dust and debris embedded in the filter pores, greatly improving the dust removal effect, reducing the corrosion of electrical components by dust accumulation inside the box, and further reducing the frequency of manual opening and cleaning. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is an isometric view of the present invention; Figure 2 This is an isometric view of the sliding support frame of the present invention after it has moved outward. Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 4 This is a schematic diagram of the sliding support frame structure of the present invention; Figure 5 This is a cross-sectional view of the mounting frame structure of the present invention; Figure 6 This is a schematic diagram of the connection structure of the annular filter body of the present invention; Figure 7 for Figure 6 Enlarged view of region A; Figure 8 This is a schematic diagram of the first drive shaft connection structure of the present invention; Figure 9 This is a cross-sectional structural diagram of the box body of the present invention; Figure 10 This is a schematic cross-sectional view of the sealing cylinder body of the present invention; In the diagram: 1. Housing; 2. Annular sliding cavity; 3. Sliding support frame; 4. Mounting frame; 5. Annular filter body; 6. Clearance groove; 7. Sealing cylinder; 8. Moving plate; 9. Drive rod; 10. Connecting seat; 11. Return spring; 12. Positioning hole; 13. Guide slide rod; 14. First drive shaft; 15. Second drive shaft; 16. Drive roller; 17. Driven roller; 18. Transmission opening; 19. Extrusion rod; 20. Guide block; 21. Sliding hole; 2. First one-way bearing; 23. Energy storage sleeve; 24. Spiral torsion spring; 25. Second one-way bearing; 26. Transmission rod; 27. Friction wheel; 28. Friction shell; 29. ​​Cleaning rod; 30. Transmission shaft; 31. Cleaning roller; 32. First transmission wheel; 33. Second transmission wheel; 34. Transmission belt; 35. Folding elastic airbag; 36. Air tank; 37. Air jet cleaning pipe; 38. Cleaning nozzle; 39. Ventilation plate; 40. Ventilation opening; 41. Box door. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0018] In order to provide an intelligent metering box that can automatically and dynamically adjust the ventilation air intake based on the internal temperature of the box, and simultaneously perform automatic dust filter cleaning, as an embodiment of the present invention, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the intelligent metering box of the present invention includes a box body 1, with an installation opening at the front end of the box body 1, and an annular sliding cavity 2 extending in the front-back direction inside the side wall of the box body 1; a sliding support frame 3 that can move back and forth is slidably assembled inside the annular sliding cavity 2; a temperature-sensing telescopic drive structure is provided between the sliding support frame 3 and the cavity wall of the annular sliding cavity 2; an installation frame 4 is fixedly provided on both sides of the sliding support frame 3, and a ventilation filter assembly is assembled on the installation frame 4, the ventilation filter assembly including a rotatable annular filter body 5; an avoidance groove 6 corresponding to the installation frame 4 is provided in the annular sliding cavity 2; a power-accumulating filter cleaning mechanism is provided inside the installation frame 4; the power-accumulating filter cleaning mechanism elastically accumulates power through the reciprocating linear motion of the sliding support frame 3, and releases power to drive the annular filter body 5 to rotate when the accumulated power reaches a set damping threshold; the power-accumulating filter cleaning mechanism is equipped with a cleaning actuator that fits with the annular filter body 5.

[0019] During initial assembly, the power metering components are installed inside the enclosure 1. When the components inside the enclosure 1 generate heat during continuous operation or when the outdoor ambient temperature rises in summer, the temperature inside the enclosure 1 is conducted to the temperature-sensitive telescopic drive structure. The temperature-sensitive telescopic drive structure elongates and deforms due to the heat, driving the sliding support frame 3 to slide outward along the annular sliding cavity 2. During the outward extension of the sliding support frame 3, a hollow air insulation interlayer is automatically formed between the outer wall of the sliding support frame 3 and the inner wall of the annular sliding cavity 2. At the same time, the sliding support frame 3 drives the mounting frames 4 on both sides to move outward synchronously, and the ventilation filter assembly extends with the mounting frames 4, thus increasing the ventilation area of ​​the enclosure 1. The higher the ambient temperature and the temperature of the components inside the enclosure 1, the greater the elongation of the temperature-sensitive telescopic drive structure, the farther the sliding support frame 3 extends, and the ventilation filter assembly is fully opened, thus improving the ventilation and heat dissipation efficiency. Under high-temperature conditions during summer, the hollow air insulation layer formed by the outward movement of the sliding support frame 3 can prevent the high-temperature heat generated by the external sun exposure of the enclosure 1 from being directly conducted to the interior of the enclosure 1, reducing the temperature rise of the components inside the enclosure 1 and avoiding faults such as metering deviation, communication interruption, and insulation failure caused by long-term high-temperature operation of the components; at the same time, the ventilation filter assembly is fully opened to form a convection air duct, and the high-temperature air inside the enclosure 1 can be quickly discharged to the outside. The dual effect of internal and external air circulation and heat dissipation continuously and stably controls the working temperature inside the enclosure 1. When the ambient temperature drops at night, the equipment stops to cool down, or the winter temperature drops, the internal temperature of the annular sliding cavity 2 decreases. The temperature-sensing expansion and contraction drive structure contracts when it encounters cold, pulling the sliding support frame 3 back into the annular sliding cavity 2 to reset. The sliding support frame 3 re-fits the cavity wall of the annular sliding cavity 2, the hollow air insulation interlayer disappears, and the ventilation filter assembly retracts to reduce the ventilation channel. In low-temperature environments, the ventilation volume is reduced, reducing the heat loss from the box 1 to the outside. At the same time, the overall airtightness of the box 1 is stronger, which can significantly reduce the entry of cold air into the box 1, avoid condensation and frost on the surface of the components inside the box 1, and prevent the components from getting damp, short-circuiting, and aging of insulation. During the alternation of day and night temperature differences and seasonal temperature changes, the sliding support frame 3 continuously extends and retracts in a reciprocating linear motion within the annular sliding cavity 2, adapting to temperature changes. Each reciprocating movement of the sliding support frame 3 provides power to the energy-accumulating filter cleaning mechanism for elastic energy storage. Multiple reciprocating movements continuously accumulate elastic mechanical energy. When the stored energy reaches the damping threshold set by the mechanism, the energy-accumulating filter cleaning mechanism instantly releases the stored power, driving the annular filter body 5 inside the ventilation filter assembly to rotate as a whole. During the rotation, the cleaning actuators equipped with the energy-accumulating filter cleaning mechanism continuously adhere to the surface of the annular filter body 5, quickly scraping away accumulated willow catkins, dust, fallen leaves, insects, and other debris from the filter surface, completing the automatic cleaning of the annular filter body 5, clearing the ventilation channel, preventing filter blockage and heat dissipation failure, reducing the workload of manual inspection and dust removal of outdoor distributed metering boxes, and lowering long-term maintenance costs. After the filter screen is automatically cleaned, the power-accumulating filter screen cleaning mechanism releases its power and waits for the next round of sliding support frame 3 to reciprocate and accumulate elastic power again, so as to achieve periodic autonomous dust removal without the need for manual opening of the box for cleaning and maintenance.

[0020] To facilitate automatic adjustment of the ventilation and heat dissipation area based on changes in the internal temperature of enclosure 1, for example, such as Figure 5 , Figure 6 , Figure 10 As shown, the present invention also includes a temperature-sensing telescopic drive structure comprising several horizontally sealed cylinders 7, the sealed cylinders 7 being fixedly embedded in the sliding support frame 3, a movable plate 8 being slidably mounted inside the sealed cylinders 7, a horizontally arranged drive rod 9 being fixedly connected to the side of the movable plate 8 facing the inner wall of the annular sliding cavity 2, the end of the drive rod 9 away from the movable plate 8 penetrating the sealed cylinder 7 and being fixedly connected to the inner wall of the annular sliding cavity 2 through a connecting seat 10; a thermally expanding fluid is sealed and filled between the side of the movable plate 8 away from the drive rod 9 and the inner wall of the sealed cylinder 7, and a return spring 11 is fixedly connected between the end of the movable plate 8 near the drive rod 9 and the inner wall of the sealed cylinder 7; The lower end of the sliding support frame 3 is provided with several sets of horizontally arranged positioning holes 12, and the inner wall of the annular sliding cavity 2 is fixedly connected with a guide slide rod 13 that slides in cooperation with the positioning holes 12.

[0021] During use, the internal components of the housing 1 generate heat or the outside temperature rises in summer, and the heat is conducted to the sealing cylinder 7. The thermal expansion fluid inside the sealing cylinder 7 expands due to the heat, squeezing the moving plate 8. The drive rod 9 remains stationary, and the expansion thrust pushes the sealing cylinder 7 and the sliding support frame 3 outward as a whole. Throughout the entire outward sliding process of the sliding support frame 3, the positioning hole 12 and the guide slide rod 13 slide and engage. The guide slide rod 13 continuously restricts the sliding support frame 3, ensuring the stability of the sliding support frame 3 during the translation process. As the temperature drops at night and the heat generated by the internal components of the enclosure 1 decreases, the thermally expanding fluid inside the sealed cylinder 7 cools and contracts, and the thrust of the fluid on the moving plate 8 disappears. At this time, the reset spring 11 pushes the sealed cylinder 7 and the sliding support frame 3 to automatically retract inward and reset, so as to facilitate the automatic adjustment of the ventilation and heat dissipation area according to the temperature change inside the enclosure 1.

[0022] To extend the effective ventilation time of the filter and reduce the frequency of manual cleaning, for example, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the present invention also includes a through-mounting groove inside the mounting frame 4, with a first drive shaft 14 and a second drive shaft 15 rotatably connected to the upper and lower ends of the mounting groove, and a drive roller 16 and a driven roller 17 respectively mounted on the first drive shaft 14 and the second drive shaft 15, and an annular filter body 5 surrounding and assembled on the outside of the drive roller 16 and the driven roller 17. The first drive shaft 14 has a transmission opening 18 on one side facing the inner wall of the annular sliding cavity 2. The inner wall of the transmission opening 18 is formed with a spiral guide groove. A pressing rod 19 is inserted inside the transmission opening 18. A guide block 20 is formed on the pressing rod 19 to slide in cooperation with the spiral guide groove. The outer side of the sliding support frame 3 is provided with a sliding hole 21 that communicates with the transmission opening 18. One end of the pressing rod 19 passes through the sliding hole 21 and is rotatably connected to the inner wall of the annular sliding cavity 2 through the first one-way bearing 22.

[0023] During use, as the sliding support frame 3 extends outward with the internal temperature of the housing 1, the position of the extrusion rod 19 is locked by the first one-way bearing 22 and cannot rotate. The outward movement of the sliding support frame 3 drives the sliding hole 21 to pull the extrusion rod 19 synchronously. The guide block 20 on the outside of the extrusion rod 19 slides and engages with the spiral guide groove on the inner wall of the transmission opening 18, driving the first drive shaft 14 to rotate. The first drive shaft 14 drives the drive roller 16 to rotate synchronously. The drive roller 16 pulls the annular filter body 5 to rotate a certain distance, changing the working surface of the annular filter body 5, avoiding long-term dust accumulation and blockage in the same filter area, continuously ensuring ventilation flow, and improving the heat dissipation stability of the housing 1. When the internal temperature of the housing 1 drops and the sliding support frame 3 retracts inward to reset, the sliding support frame 3 drives the sliding hole 21 to push the extrusion rod 19 in the opposite direction. The spiral guide groove and the guide block 20 cooperate again to generate torsional force. At this time, the first one-way bearing 22 is unlocked and enters the idling state. The extrusion rod 19 can rotate freely and will not drive the first drive shaft 14 to rotate in the opposite direction, thus preventing the annular filter body 5 from returning to the original dust accumulation working surface. No additional power source is required. The working surface of the filter can be intermittently switched by the temperature change reciprocating motion of the sliding support frame 3, which extends the effective ventilation time of the filter and reduces the frequency of manual cleaning.

[0024] To significantly reduce the frequency of manual dust cleaning and maintenance, for example, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention also includes a power-accumulating filter cleaning mechanism comprising a power-accumulating housing 23 rotatably mounted on the end of the first drive shaft 14 away from the first one-way bearing 22, the power-accumulating housing 23 being integrally embedded and fixedly installed on the inner wall of the sliding support frame 3; a spiral torsion spring 24 is provided inside the power-accumulating housing 23, and the two ends of the spiral torsion spring 24 are respectively connected to the power-accumulating housing 23 and the first drive shaft 14. The first drive shaft 14 is connected in sequence to the second one-way bearing 25, the transmission rod 26, and the friction wheel 27 at one end near the power storage housing 23. The friction housing 28 is embedded and fixedly installed in the inner wall of the sliding support frame 3. The friction wheel 27 is rotatably assembled inside the friction housing 28, and the outer circumferential surface of the friction wheel 27 forms a friction transmission cooperation with the inner wall of the friction housing 28.

[0025] In use, when the sliding support frame 3 slides outward, the first drive shaft 14 rotates synchronously, driving the scroll torsion spring 24 to continuously torsion and store energy. The second one-way bearing 25 prevents the first drive shaft 14 from driving the transmission rod 26 to rotate at this time. The friction wheel 27 and the friction shell 28 maintain stability by static friction. This prevents the scroll torsion spring 24 from releasing torque to drive the first drive shaft 14 to rotate. In this way, during the reciprocating movement of the sliding support frame 3, the one-way torsion scroll torsion spring 24 stores energy. At the same time, each extension stroke only completes a small amount of energy storage, realizing slow energy storage in stages. With repeated sliding caused by the temperature difference between day and night and the temperature change inside the box 1, the elastic torque accumulated inside the scroll torsion spring 24 continues to increase. When the total torque of the scroll torsion spring 24 is greater than the static friction threshold between the friction wheel 27 and the friction shell 28, relative sliding occurs between the friction wheel 27 and the friction shell 28. Since the sliding friction is less than the static friction, the scroll torsion spring 24 rebounds instantly to release the stored energy, driving the first drive shaft 14, the second one-way bearing 25, the transmission rod 26 and the friction wheel 27 to rotate at high speed continuously, driving the annular filter body 5 to rotate significantly in one go. During the high-speed rotation, the cleaning actuator simultaneously and comprehensively scrapes away the willow catkins, floating dust and debris accumulated on the surface of the annular filter body 5, completing the filter working surface switching and overall deep cleaning in one go; effectively maintaining the ventilation channel is unobstructed, and greatly reducing the frequency of manual dust cleaning and maintenance of outdoor metering boxes.

[0026] For example, such as Figure 5 As shown, the present invention also includes a horizontally arranged cleaning rod 29 fixedly connected to the upper inner side of the mounting frame 4, wherein the end face of the cleaning rod 29 facing the annular filter body 5 is pressed and adhered to the outer surface of the annular filter body 5.

[0027] When in use, the sliding support frame 3 slides outward, which will cause the annular filter body 5 to rotate. During the rotation of the annular filter body 5, the cleaning rod 29 is always pressed and adhered to the outer surface of the annular filter body 5, continuously scraping off the dust, catkins, and debris attached to the outer surface of the annular filter body 5. The cleaning rod 29 only scrapes dust on the outer working surface of the filter screen, and the debris falls directly outward and will not be carried into the box 1 with the rotation of the annular filter body 5, thus avoiding dust and catkins from entering the box 1 in reverse and contaminating the internal metering components.

[0028] To facilitate cleaning of the annular filter body 5, for example, such as Figure 6 , Figure 7 As shown, the present invention also includes a horizontally arranged drive shaft 30 in the power storage filter cleaning mechanism. The drive shaft 30 is rotatably mounted on the inner side of the lower end of the mounting frame 4, and a cleaning roller 31 is fixedly connected to the drive shaft 30. A first drive wheel 32 is fixedly mounted at both ends of the drive shaft 30, and a second drive wheel 33 is fixedly mounted at both ends of the second drive shaft 15. The first drive wheel 32 and the second drive wheel 33 are driven by a drive belt 34. The mounting frame 4 is provided with mounting cavities corresponding to the first drive wheel 32, the second drive wheel 33 and the drive belt 34.

[0029] In use, the first drive shaft 14 drives the drive roller 16 to rotate, and the drive roller 16 pulls the annular filter body 5 to move forward. The annular filter body 5 synchronously drives the driven roller 17 and the second drive shaft 15 to rotate. The second transmission wheels 33 mounted at both ends of the second drive shaft 15 rotate synchronously, and drive the first transmission wheels 32 at both ends of the transmission shaft 30 to rotate in conjunction via the transmission belt 34. The transmission shaft 30 then drives the cleaning roller 31 arranged at the lower end to rotate synchronously. The cleaning roller 31 is in contact with the outer surface of the annular filter body 5 to scrape and brush away impurities synchronously. All the dust, catkins and debris that are swept off fall directly to the outside of the box 1 and will not be brought into the box 1 with the rotation of the annular filter body 5, thus preventing the accumulation of debris from contaminating the metering components inside the box.

[0030] To facilitate dust removal inside housing 1, for example, such as Figure 3 , Figure 9As shown, the present invention also includes a folding elastic airbag 35 fixedly connected to the inner side of the upper end and the inner side of the lower end of the annular sliding cavity 2, and an air tank 36 fixedly installed on the top of the box body 1; one end of the folding elastic airbag 35 is fixedly connected to the inner wall of the annular sliding cavity 2, and the other end of the folding elastic airbag 35 is fixedly connected to the side wall of the sliding support frame 3; the folding elastic airbag 35 is equipped with a one-way air inlet valve and a one-way air outlet valve, the one-way air inlet valve is connected to the outside air, and the one-way air outlet valve is connected to the air tank 36 through a pipeline; multiple horizontally arranged jet cleaning pipes 37 are fixedly connected to the inner wall of the box body 1, and multiple sets of downwardly inclined cleaning nozzles 38 are opened on the outer wall of the jet cleaning pipes 37; a delayed pressure relief valve is installed at the outlet end of the air tank 36, and the air tank 36 is connected to the jet cleaning pipe 37 pipeline through the delayed pressure relief valve.

[0031] During use, the sliding support frame 3 slides back and forth inside the annular sliding cavity 2 as the temperature changes. When the sliding support frame 3 extends outward, it stretches the folded elastic airbags 35 at both ends. The expansion of the cavity of the folded elastic airbag 35 generates negative pressure, and outside air is drawn into the folded elastic airbag 35 through the one-way air inlet valve. When the sliding support frame 3 retracts inward to reset, it compresses the folded elastic airbag 35, and the cavity volume shrinks to form high pressure. The one-way air inlet valve closes and the one-way air outlet valve automatically opens. The air inside the folded elastic airbag 35 is continuously pressed into the air storage tank 36 through the pipeline to complete the air storage. Each reciprocating movement of the sliding support frame 3 can complete one air intake and inflation action, continuously accumulating high-pressure gas without the need for external air compressors, electric air pumps or other air supply equipment. With repeated temperature-changing reciprocating movements of the sliding support frame 3, the air tank 36 continuously stores a sufficient amount of high-pressure air. When the air pressure inside the air tank 36 reaches the preset trigger threshold of the delayed pressure relief valve, the delayed pressure relief valve automatically opens, and the high-pressure airflow inside the air tank 36 is instantly introduced into the jet cleaning pipe 37 arranged on the inner wall of the housing 1. The jet cleaning pipe 37 sprays high-pressure airflow outward through multiple sets of downwardly arranged cleaning nozzles 38. The high-pressure airflow sweeps the internal space of the housing 1, blowing all the floating dust, flocculent debris, and metal dust deposited inside the housing 1 toward the annular filter body 5. The high-pressure airflow penetrates the annular filter body 5 to form a reverse flushing effect, which can wash away the annular filter. Stubborn dust and debris remaining on the outside of the filter body 5 and embedded in the gaps of the filter holes; avoiding the need to rely solely on mechanical scraping to clean the filter screen, as fine dust can easily clog the filter holes and cannot be completely removed; long-term accumulation of dust inside the housing 1 will adhere to the surface of the electricity meter and wiring terminals, causing malfunctions such as metering accuracy deviation and reduced line insulation; by using the folded elastic airbag 35 to reciprocate pump air to continuously store a high-pressure air source, periodically and automatically completing the internal blowing of the housing 1 and the reverse washing of the filter screen, the dust removal effect is greatly improved; effectively reducing the corrosion of electrical components by dust accumulation inside the housing, extending the service life of metering equipment, and reducing the operation and maintenance costs of manual opening and blowing dust at outdoor decentralized points.

[0032] For example, the present invention further includes a sealing strip fixedly connected to the inner sidewall of the annular sliding cavity 2, and the sealing strip slides and presses against the outer sidewall of the sliding support frame 3.

[0033] During use, the sealing strips on the inner walls of the annular sliding cavity 2 are always pressed and adhered to the outer wall of the sliding support frame 3. Regardless of whether the sliding support frame 3 extends or retracts, it can continuously seal the gap between the annular sliding cavity 2 and the sliding support frame 3, preventing rainwater and sand from seeping into the interior of the annular sliding cavity 2.

[0034] For example, such as Figure 5 As shown, the present invention also includes a ventilation plate 39 fixedly connected in the mounting groove between the first drive shaft 14 and the second drive shaft 15, and the ventilation plate 39 has a plurality of vents 40 arranged at an angle toward the lower outer side of the housing 1.

[0035] When in use, the ventilation openings 40 on the ventilation plate 39, which are arranged at an angle to the outside and below the box 1, form a water-guiding and rain-blocking structure, reducing rainwater intrusion and lowering the risk of short circuits caused by moisture in the components.

[0036] For example, such as Figure 1 As shown, the present invention also includes a sliding support frame 3 with a hinged assembly box door 41 on the side near the mounting opening.

[0037] When in use, staff can directly open the door 41, which is hinged to the sliding support frame 3, to quickly install, inspect, and replace the metering components inside the box 1. The door 41 moves back and forth synchronously with the sliding support frame 3 without the need for separate disassembly and assembly, making operation convenient and improving maintenance efficiency.

[0038] When in use, the power metering components are installed inside the housing 1. Under normal temperature conditions, the sliding support frame 3 is stored inside the annular sliding cavity 2. The ventilation filter assembly is in a retracted state. The housing 1 has strong overall airtightness, which reduces the intrusion of external cold air, prevents condensation and frost on the surface of the components, and prevents moisture-induced short circuits and insulation aging. When the components inside the enclosure 1 generate heat during operation or when the outside temperature rises in summer, the heat is conducted to the sealed cylinder 7. The internal thermally expanding fluid expands and compresses the moving plate 8. Because the position of the drive rod 9 is fixed, the expansion thrust pushes the sealed cylinder 7 and the sliding support frame 3 outward as a whole. After the sliding support frame 3 moves outward, a hollow air insulation layer is formed between the outer wall and the inner wall of the annular sliding cavity 2, which blocks the external high temperature from being conducted into the enclosure, reduces the temperature rise of the components, and avoids faults such as metering deviation, communication interruption, and insulation failure caused by long-term high-temperature operation. The two side mounting frames 4 move outward synchronously with the sliding support frame 3, the ventilation filter assembly extends synchronously, and the ventilation area of ​​the box 1 increases synchronously with the temperature rise, forming a convection air duct to accelerate the exhaust of high-temperature air inside the box. The internal and external circulation heat dissipation continuously and stably controls the working temperature inside the box; the positioning hole 12 and the guide slide rod 13 slide together to limit the offset and tilt of the sliding support frame 3, ensuring a smooth and stable translation process and avoiding friction and jamming. When the sliding support frame 3 slides outward, the first one-way bearing 22 locks the extrusion rod 19 so that it cannot rotate. The sliding hole 21 moves outward with the sliding support frame 3 and pulls the extrusion rod 19. The guide block 20 slides with the spiral guide groove, driving the first drive shaft 14 to rotate. The first drive shaft 14 drives the drive roller 16 to rotate synchronously, pulling the annular filter body 5 to rotate a certain distance, switching to a brand new working surface, avoiding long-term dust accumulation and blockage in the same area, continuously ensuring ventilation and improving heat dissipation stability. The first drive shaft 14 synchronously drives the spiral torsion spring 24 to store energy. Relying on the second one-way bearing 25, the friction wheel 27 is not driven to rotate. Only a small amount of energy is stored in a single stroke, realizing slow energy storage in stages and avoiding wear from frequent movement of the mechanism. During the rotation of the filter screen, the upper cleaning rod 29 continuously squeezes and adheres to the outer surface of the filter screen to scrape off surface dust, catkins, and debris. The debris falls directly to the outside and will not enter the housing 1 with the filter screen to contaminate the metering components. When the temperature drops at night, the equipment stops, or the winter temperature falls, the thermally expanding fluid cools and contracts, the thrust on the moving plate 8 disappears, the reset spring 11 pushes the sealed cylinder 7 and the sliding support frame 3 to retract and reset inward, the hollow air insulation layer disappears, the ventilation filter assembly retracts and narrows the ventilation channel, reducing heat loss inside the box, enhancing the airtight insulation effect at low temperatures, and preventing condensation and frost; when retracting, the spiral guide groove acts in the opposite direction on the extrusion rod 19, at this time the first one-way bearing 22 is unlocked and rotates freely, the extrusion rod 19 rotates freely without driving the first drive shaft 14 to rotate, preventing the switched filter working surface from returning to the dust accumulation area; When the sliding support frame 3 extends outward, it stretches and folds the elastic airbag 35 and draws in outside air through the one-way air intake valve. When the sliding support frame 3 returns to its original position, it squeezes and folds the elastic airbag 35 and presses the air into the air tank 36 through the one-way air outlet valve to complete the inflation. Each reciprocating movement can complete one air intake and inflation cycle, continuously accumulating high-pressure gas without the need for external air supply equipment. As the temperature difference between day and night and the temperature change inside the housing 1 change, the sliding support frame 3 continues to slide back and forth, and the accumulated elastic torque of the spiral torsion spring 24 continues to increase. When the total torque of the spiral torsion spring 24 exceeds the static friction threshold between the friction wheel 27 and the friction shell 28, the friction pair slides relative to each other, the sliding friction drops sharply, and the spiral torsion spring 24 rebounds instantly to release all the stored energy, driving the first drive shaft 14 to rotate at high speed and continuously, driving the annular filter body 5 to rotate at high speed. During the high-speed rotation, the upper cleaning rod 29 and the lower cleaning roller 31 work synchronously: the driven roller 17 rotates with the annular filter body 5 to drive the second drive shaft 15 to rotate, and through the linkage of the second transmission wheel 33, the transmission belt 34, the first transmission wheel 32, and the transmission shaft 30, it drives the cleaning roller 31 to rotate synchronously. The upper and lower rollers work together to sweep the entire outer area of ​​the filter screen, and the surface dust and clumps can be thoroughly removed. The entire filter screen working surface is switched and deep cleaned in one go, the ventilation channel is cleared, and the filter screen is prevented from clogging and causing heat dissipation failure. After cleaning, the vortex torsion spring 24 resets and waits for the next round of reciprocating motion to recharge, achieving periodic autonomous dust removal. No manual opening and maintenance is required throughout the process, which greatly reduces the operation and maintenance costs of outdoor decentralized points. Meanwhile, after multiple cycles, the air pressure inside the gas tank 36 continues to rise. When it reaches the preset threshold of the delayed pressure relief valve, the pressure relief valve automatically opens, and high-pressure air flows into the jet cleaning pipe 37 on the inner wall of the housing 1. It is then sprayed outward through multiple sets of downward-sloping cleaning nozzles 38. The high-pressure airflow sweeps the inside of the housing 1, blowing all the deposited dust, flocculent debris, and metal dust toward the annular filter body 5. At the same time, the airflow penetrates the annular filter body 5 to form a reverse flushing effect, washing away the fine and stubborn dust stuck in the gaps of the filter holes. This compensates for the inability of mechanical scraping to clean up micro-clogging, improves the dust removal and impurity removal effect, reduces the impact of dust accumulation in the housing on the metering accuracy and the insulation performance of components, extends the service life of the equipment, and further reduces the frequency of manual cleaning and maintenance.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smart metering box, characterized in that, The device includes a housing (1), with an installation opening at the front end. An annular sliding cavity (2) extending in the front-back direction is opened inside the side wall of the housing (1). A sliding support frame (3) that can move back and forth is slidably installed inside the annular sliding cavity (2). A temperature-sensing telescopic drive structure is provided between the sliding support frame (3) and the cavity wall of the annular sliding cavity (2). An installation frame (4) is fixedly installed on both sides of the sliding support frame (3). A ventilation filter assembly is installed on the installation frame (4). The ventilation filter assembly includes a rotating annular filter body (5). A clearance groove (6) corresponding to the installation frame (4) is opened in the annular sliding cavity (2). A power-accumulating filter cleaning mechanism is set inside the installation frame (4). The power-accumulating filter cleaning mechanism accumulates elastic power through the reciprocating linear motion of the sliding support frame (3). When the power reaches the set damping threshold, it releases the power to drive the annular filter body (5) to rotate. The power-accumulating filter cleaning mechanism is equipped with a cleaning actuator that fits with the annular filter body (5).

2. The intelligent metering box according to claim 1, characterized in that, The temperature-sensing telescopic drive structure includes several horizontal sealed cylinders (7), which are fixedly embedded in the sliding support frame (3). A movable plate (8) is installed inside the sealed cylinder (7). A horizontally arranged drive rod (9) is fixedly connected to the side of the movable plate (8) facing the inner wall of the annular sliding cavity (2). The end of the drive rod (9) away from the movable plate (8) passes through the sealed cylinder (7) and is fixedly connected to the inner wall of the annular sliding cavity (2) through the connecting seat (10). The side of the movable plate (8) away from the drive rod (9) and the inner wall of the sealed cylinder (7) are sealed and filled with thermal expansion fluid. A return spring (11) is fixedly connected between the end of the movable plate (8) near the drive rod (9) and the inner wall of the sealed cylinder (7). The lower end of the sliding support frame (3) is provided with several sets of horizontally arranged positioning holes (12), and the inner wall of the annular sliding cavity (2) is fixedly connected with a guide slide rod (13) that slides in the positioning hole (12).

3. The intelligent metering box according to claim 2, characterized in that, The mounting frame (4) has a through mounting groove inside. The upper and lower ends of the mounting groove are respectively rotatably connected to the first drive shaft (14) and the second drive shaft (15). The first drive shaft (14) and the second drive shaft (15) are respectively mounted on the drive roller (16) and the driven roller (17). The annular filter body (5) is assembled around the outside of the drive roller (16) and the driven roller (17). The first drive shaft (14) has a transmission opening (18) on one side facing the inner wall of the annular sliding cavity (2). The inner wall of the transmission opening (18) is formed with a spiral guide groove. A pressing rod (19) is inserted inside the transmission opening (18). A guide block (20) is formed on the pressing rod (19) and slides with the spiral guide groove. The outer side of the sliding support frame (3) is provided with a sliding hole (21) that communicates with the transmission opening (18). One end of the pressing rod (19) passes through the sliding hole (21) and is rotatably connected to the inner wall of the annular sliding cavity (2) through the first one-way bearing (22).

4. The intelligent metering box according to claim 3, characterized in that, The accumulator filter cleaning mechanism includes an accumulator housing (23) rotatably mounted on the end of the first drive shaft (14) away from the first one-way bearing (22). The accumulator housing (23) is integrally embedded and fixedly installed on the inner wall of the sliding support frame (3). A spiral torsion spring (24) is provided inside the accumulator housing (23). The two ends of the spiral torsion spring (24) are respectively connected to the accumulator housing (23) and the first drive shaft (14). The first drive shaft (14) is connected in sequence to the second one-way bearing (25), the transmission rod (26), and the friction wheel (27) at one end near the power storage housing (23). The friction housing (28) is embedded and fixedly installed in the inner wall of the sliding support frame (3). The friction wheel (27) is rotated and assembled inside the friction housing (28). The outer circumferential surface of the friction wheel (27) and the inner wall of the friction housing (28) form a friction transmission cooperation.

5. The intelligent metering box according to claim 4, characterized in that, The cleaning rod (29) is fixedly connected to the upper inner side of the mounting frame (4). The end face of the cleaning rod (29) facing the annular filter body (5) is pressed against the outer surface of the annular filter body (5).

6. The intelligent metering box according to claim 5, characterized in that, The power-operated filter cleaning mechanism also includes a horizontally arranged drive shaft (30), which is rotatably mounted on the inner side of the lower end of the mounting frame (4). A cleaning roller (31) is fixedly connected to the drive shaft (30). The first drive wheel (32) is fixedly mounted at both ends of the drive shaft (30), and the second drive wheel (33) is fixedly mounted at both ends of the second drive shaft (15). The first drive wheel (32) and the second drive wheel (33) are driven by a drive belt (34). The mounting frame (4) is provided with mounting cavities corresponding to the first drive wheel (32), the second drive wheel (33) and the drive belt (34).

7. The intelligent metering box according to claim 6, characterized in that, The inner sides of the upper and lower ends of the annular sliding cavity (2) are fixedly connected to folded elastic airbags (35), and the top of the box (1) is fixedly installed with an air tank (36); one end of the folded elastic airbag (35) is fixedly connected to the inner wall of the annular sliding cavity (2), and the other end of the folded elastic airbag (35) is fixedly connected to the side wall of the sliding support frame (3); the folded elastic airbag (35) is equipped with a one-way air inlet valve and a one-way air outlet valve. The one-way air inlet valve is connected to the outside air, and the one-way air outlet valve is connected to the air tank (36) through a pipeline; multiple horizontally arranged jet cleaning pipes (37) are fixedly connected to the inner wall of the box (1), and multiple sets of downwardly arranged cleaning nozzles (38) are opened on the outer wall of the jet cleaning pipes (37); a delayed pressure relief valve is installed at the outlet end of the air tank (36), and the air tank (36) is connected to the jet cleaning pipe (37) through the delayed pressure relief valve.

8. The intelligent metering box according to claim 1, characterized in that, A sealing strip is fixedly connected to the inner wall of the annular sliding cavity (2), and the sealing strip slides and presses against the outer wall of the sliding support frame (3).

9. A smart metering box according to claim 3, characterized in that, A ventilation plate (39) is fixedly connected in the mounting groove between the first drive shaft (14) and the second drive shaft (15). The ventilation plate (39) has several sets of vents (40) arranged at an angle to the outside and below the box body (1).

10. A smart metering box according to claim 1, characterized in that, The sliding support frame (3) is hinged to the assembly box door (41) on the side near the installation opening.

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