Aluminum alloy single-phase electric energy metering box resistant to external factor interference

Abstract

The application belongs to the technical field of electric energy metering equipment, and particularly relates to an aluminum alloy single-phase electric energy metering box resistant to external factor interference, which comprises a box body, a partition plate, a wiring chamber, a mounting chamber, a box door, a moving assembly, a sealing assembly and a ventilation assembly. The two moving assemblies are arranged at the lower end of the box body. The two sealing assemblies are arranged on the box body and each comprises a sealing air bag arranged on the front of the box body, a piston cylinder fixedly connected to the lower end of the box body and a piston plate slidingly connected to the piston cylinder. The piston plate is in transmission connection with the moving assembly. The two ventilation assemblies are arranged on the left and right sides of the box body. The two limiting assemblies are arranged at the front ends of the two box bodies and are used for locking and limiting the box door in the closed state. The box body can be sealed, the filter screen can be automatically cleaned and the box door can be mechanically locked through a single sliding operation, so that external interference factors are blocked in all directions.

Description

Technical Field

[0001] This invention belongs to the technical field of electricity metering equipment, specifically relating to an aluminum alloy single-phase electricity metering box that is resistant to external interference. Background Technology

[0002] Electricity metering boxes are key devices in power systems used to install electricity meters and related electrical components. They are widely used in electricity metering in residential buildings, commercial buildings, and industrial and mining enterprises. With the continuous improvement of power grid intelligence, the operating environment of electricity metering boxes is becoming increasingly complex, and the requirements for their protection performance are also increasing. Currently, most single-phase electricity metering boxes on the market are made of aluminum alloy, which has gradually replaced traditional steel or plastic metering boxes due to its advantages such as light weight, high strength, and corrosion resistance.

[0003] Although the existing technology is relatively mature, some shortcomings still exist in long-term outdoor practical use:

[0004] Firstly, the sealing method between the cabinet door and the cabinet body is relatively simple, mostly relying on a sealing strip embedded in the edge of the door. Over time, the sealing strip is prone to aging, compression deformation, and loss of elasticity, leading to a decline in sealing performance. This allows rainwater, moisture, and dust to easily seep into the cabinet through the door gaps, corroding electrical components and affecting measurement accuracy and equipment lifespan. This problem is particularly prominent in humid, rainy, or windy areas.

[0005] Secondly, conventional metering boxes typically rely on simple latches or ordinary locks for door closure. In outdoor environments, external factors such as wind, vehicle vibrations, and accidental contact can cause latches to loosen and locks to malfunction, leading to a risk of the door opening unexpectedly. Once the door opens accidentally, external dust, moisture, and insects can enter the box, interfering with and damaging the metering components. Summary of the Invention

[0006] In view of this, the purpose of this invention is to propose an aluminum alloy single-phase power metering box that is resistant to external interference. It can achieve box sealing, automatic cleaning of the filter screen and mechanical locking of the box door through a single sliding movement, thus blocking external interference factors in all directions.

[0007] The specific technical solution adopted by this invention is as follows:

[0008] An aluminum alloy single-phase power metering box resistant to external interference includes a box body, a partition fixedly connected inside the box body, which divides the box body into a wiring chamber and an installation chamber. A box door is hinged to the front end of the box body at the position corresponding to the wiring chamber and the installation chamber.

[0009] Movable components, both of which are disposed at the lower end of the housing;

[0010] The sealing assembly, both of which are disposed on the housing, each includes a sealing airbag disposed on the front of the housing, a piston cylinder fixedly connected to the lower end of the housing, and a piston plate slidably connected inside the piston cylinder, wherein the piston plate is connected to the moving assembly in a transmission connection.

[0011] The ventilation components are respectively arranged on the left and right sides of the housing, each including a ventilation section opened on the side wall of the housing and a cleaning section arranged in the ventilation section, wherein the cleaning section is connected to the moving component in a transmission manner;

[0012] Limiting components, two of which are respectively disposed at the front end of the two boxes, are used to lock and limit the boxes when the boxes are closed.

[0013] In a preferred embodiment, exhaust fans are installed at the upper ends of both the wiring chamber and the mounting chamber.

[0014] In a preferred embodiment, the movable component includes a slide rail, which is fixedly installed in a mounting groove at the lower end of the housing. A slider is slidably connected to the slide rail. A through groove is provided at the lower front end of the housing. A fixed rod is fixedly connected to one side of the slider and extends along the through groove to the outside of the housing. A movable groove is provided at the front end of the fixed rod, and a moving rod is slidably inserted into one end of the movable groove. A first spring is fixedly connected between the moving rod and the inner wall of the movable groove. A locking rod is fixedly connected to the front end of the moving rod. A locking hole is provided on the front of the housing. First permanent magnets are fixedly connected to both sides of the slider.

[0015] In a preferred embodiment, the sealing assembly further includes a piston rod, which is piston-type inserted into the lower end of the piston cylinder, and one end of the piston rod is fixedly connected to the piston plate. An air storage groove is provided on the front of the housing, and a sealing airbag is located outside the air storage groove. A U-shaped groove adapted to the sealing airbag is provided on the side of the housing door facing the housing. An air inlet pipe is fixedly connected to the back of the piston cylinder, and one end of the air inlet pipe extends to the outside of the housing. An air supply channel is provided between the air storage groove and the piston cylinder. A return spring is fixedly connected between the piston cylinder and the piston plate.

[0016] In a preferred embodiment, the ventilation section includes a ventilation slot, which is located on the side of the housing. A filter is fixedly installed at the air inlet end of the ventilation slot, and a rain cover is fixedly connected to the side of the housing, with the rain cover located at the ventilation slot.

[0017] In a preferred embodiment, the filter element includes a filter frame and a filter screen, wherein the filter frame is bolted to the ventilation slot and the filter screen is fixedly connected inside the filter frame.

[0018] In a preferred embodiment, the cleaning unit includes a guide rod fixedly connected to a ventilation slot. A hollow shell is slidably connected to the guide rod, and air vents are arranged in an array on the side of the hollow shell facing the filter element. A guide tube is fixedly connected inside the housing, and a traction rope is threaded through the guide tube. One end of the traction rope is fixedly connected to the hollow shell, and the other end is fixedly connected to a slider. An air vent is fixedly connected to the lower end of the piston cylinder, and one end of the air vent is fixedly connected to the hollow shell.

[0019] In a preferred embodiment, the air outlet pipe consists of a rigid pipe and a retractable flexible pipe. The rigid pipe is fixedly embedded in the housing, with one end fixedly connected to the piston cylinder and the other end fixedly connected to the retractable flexible pipe. One end of the retractable flexible pipe is fixedly connected to the hollow shell.

[0020] In a preferred embodiment, the limiting component includes a sleeve rod, which is fixedly connected to a fixed rod. A limiting rod is slidably inserted into the upper end of the sleeve rod, and a force-bearing rod is fixedly connected to the limiting rod. A guide groove is provided on the front of the housing.

[0021] In a preferred embodiment, the piston rod has a movable groove inside, a lifting rod is slidably connected inside the movable groove, a support ring is fixedly connected to the inner wall of the movable groove, and a second spring is fixedly connected between the support ring and the lifting rod. A sliding groove is provided at the lower end of the movable groove, a lifting block is slidably connected inside the sliding groove, and the lifting block is fixedly connected to the lifting rod. A second permanent magnet is fixedly connected to both ends of the lifting block.

[0022] The technical effects achieved by this invention are as follows:

[0023] This invention features a sealing airbag on the front of the enclosure and a matching U-shaped groove on the back of the door. A moving component drives a piston plate to slide within a piston cylinder, supplying compressed air through an air delivery channel into the sealing airbag, causing it to expand and form a multi-faceted, tightly fitted gas sealing barrier against the inner wall of the U-shaped groove. This sealing method provides continuous and uniform sealing pressure when the door is closed, ensuring high reliability. Furthermore, the sealing airbag actively contracts before the door is opened, effectively preventing excessive friction between the airbag and the door and extending its service life. Compared to the shortcomings of existing technologies where sealing strips are prone to aging and failure, this invention significantly improves the protection level of the electricity metering box in humid and rainy environments, ensuring the long-term stable operation of internal electrical components.

[0024] This invention features a hollow shell that slides along a guide rod within a ventilation slot. The hollow shell has an air outlet on the side facing the filter element and is connected to a moving component via a traction rope. When the operator pulls the slider to open or close the door, the slider synchronously drives the hollow shell to slide up and down along the filter screen surface. Simultaneously, compressed gas in the lower chamber of the piston cylinder is sent into the hollow shell through the air outlet pipe and ejected from the air outlet. During the movement of the hollow shell, the airflow washes away the filter screen, blowing away accumulated dust. Each door opening and closing operation simultaneously performs an automatic cleaning of the filter screen, eliminating the need for manual disassembly and maintenance. This effectively avoids the problem of reduced ventilation and heat dissipation efficiency caused by filter clogging, ensuring good heat dissipation performance of the metering box during long-term use.

[0025] This invention features a sleeve rod and a limiting rod slidably inserted into the upper end of the sleeve rod on a fixed rod. The limiting rod slides into an inclined guide groove on the front of the enclosure via a force-bearing rod. As the moving component moves towards the center of the enclosure to achieve a seal, the limiting rod automatically rises to the front of the enclosure door under the guidance of the guide groove, mechanically blocking and limiting the door, preventing it from opening forward. This limiting structure is completed simultaneously with the sealing operation of the moving component, requiring no additional steps. Compared to easily loosened latches or easily malfunctioning ordinary door locks in the prior art, the limiting method provided by this invention is reliable in structure and has a clear action, effectively resisting external interference such as wind, vibration, and accidental activation, eliminating the risk of dust, moisture, and insects entering the enclosure after accidental opening of the door.

[0026] Furthermore, this invention boasts outstanding advantages in terms of high efficiency and ease of operation. The sealing, cleaning, and limiting functions are all achieved through a single, coordinated sliding motion of the moving component. Operators simply need to pull and lock the slider according to standard procedures to simultaneously complete the sealing and moisture-proofing of the enclosure, automatic cleaning of the filter, and mechanical locking of the door. When the slider reaches its limit position, it automatically triggers the air-filling action in the upper chamber of the piston cylinder, ensuring that the sealing airbag maintains a sufficient volume of expansion air over a long period. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0030] Figure 3 This is the present invention. Figure 1 Top view;

[0031] Figure 4 This is the present invention. Figure 3 The cross-sectional view at point AA shown in the diagram;

[0032] Figure 5 This is a schematic diagram showing the connection between the moving component and the limiting component of the present invention;

[0033] Figure 6 This is the present invention. Figure 3 The cross-sectional view at BB shown;

[0034] Figure 7 This is the present invention. Figure 6 An enlarged schematic diagram of part A shown in the image;

[0035] Figure 8 This is the present invention. Figure 1 Side sectional view;

[0036] Figure 9 This is the present invention. Figure 8 Side view;

[0037] Figure 10 This is the present invention. Figure 8 An enlarged schematic diagram of part B shown in the image;

[0038] Figure 11 This is the present invention. Figure 8 An enlarged schematic diagram of part C shown in the figure.

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1. Enclosure; 2. Moving components; 3. Sealing components; 4. Ventilation components; 41. Ventilation section; 42. Cleaning section; 5. Limiting components; 7. Exhaust fan; 11. Partition; 12. Wiring chamber; 13. Mounting chamber; 14. Enclosure door;

[0041] 21. Slide rail; 22. Slider; 23. Through groove; 24. Fixed rod; 25. Movable groove; 26. Moving rod; 27. First spring; 28. Locking rod; 29. ​​Lock hole; 210. First permanent magnet;

[0042] 31. Sealing airbag; 32. Piston cylinder; 33. Piston plate; 34. Piston rod; 35. Air storage groove; 36. U-shaped groove; 37. Air inlet pipe; 38. Air delivery channel; 39. Return spring;

[0043] 411. Ventilation slot; 412. Filter element; 413. Rain cover;

[0044] 421. Guide rod; 422. Hollow shell; 423. Guide tube; 424. Traction rope; 425. Air outlet pipe;

[0045] 51. Sleeve rod; 52. Limiting rod; 53. Force-bearing rod; 54. Guide groove;

[0046] 61. Moving groove; 62. Lifting rod; 63. Support ring; 64. Second spring; 65. Slide groove; 66. Lifting block; 67. Second permanent magnet. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0048] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] Please see the appendix Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides an aluminum alloy single-phase power metering box that resists interference from external factors, including a box body 1. A partition 11 is fixedly connected inside the box body 1, and the partition 11 divides the box body 1 into a wiring chamber 12 and an installation chamber 13. Box doors 14 are hinged to the front end of the box body 1 at the positions corresponding to the wiring chamber 12 and the installation chamber 13.

[0050] Movable component 2, both movable components 2 are located at the lower end of the housing 1;

[0051] The sealing assembly 3, both sealing assemblies 3 are set on the housing 1, each including a sealing airbag 31 set on the front of the housing 1, a piston cylinder 32 fixedly connected to the lower end of the housing 1, and a piston plate 33 slidably connected in the piston cylinder 32, the piston plate 33 being connected to the moving assembly 2 in a transmission connection.

[0052] Ventilation components 4, two ventilation components 4 are respectively arranged on the left and right sides of the housing 1, each including a ventilation part 41 opened on the side wall of the housing 1 and a cleaning part 42 arranged in the ventilation part 41, the cleaning part 42 being connected to the moving component 2 in a transmission manner.

[0053] Limiting components 5, two limiting components 5 are respectively set at the front end of the two boxes 1, and are used to lock and limit the box door 14 when the box door 14 is closed.

[0054] In this embodiment, the wiring chamber 12 is equipped with electrical components such as main circuit breakers, branch circuit breakers, terminal blocks, and neutral busbars; while the installation chamber 13 is mainly equipped with electrical components such as electricity meters.

[0055] The sealing, self-cleaning, and door 14 locking functions are all achieved through the sliding movement of the moving component 2, simultaneously completing the sealing and moisture prevention, ventilation and self-cleaning, door 14 limit to prevent accidental opening, and cylinder air replenishment, comprehensively blocking external factors such as rainwater, dust, and external force opening from interfering with the metering components inside the box.

[0056] Secondly, please refer to it again. Figure 2 Both the wiring chamber 12 and the mounting chamber 13 are equipped with exhaust fans 7 at their upper ends.

[0057] Secondly, please refer to the following as well. Figure 2 , Figure 4 and Figure 5 The movable component 2 includes a slide rail 21, which is fixedly installed in the mounting groove at the lower end of the housing 1. A slider 22 is slidably connected to the slide rail 21. A through groove 23 is provided at the lower end of the front of the housing 1. A fixed rod 24 is fixedly connected to one side of the slider 22, and the fixed rod 24 extends along the through groove 23 to the outside of the housing 1. A movable groove 25 is provided at the front end of the fixed rod 24, and a moving rod 26 is slidably inserted into one end of the movable groove 25. A first spring 27 is fixedly connected between the moving rod 26 and the inner wall of the movable groove 25. A locking rod 28 is fixedly connected to the front end of the moving rod 26. A lock hole 29 is provided on the front of the housing 1. A first permanent magnet 210 is fixedly connected to both sides of the slider 22. The moving rod 26 is composed of a hexagonal prism, a sphere, and a circular plate fixedly connected together.

[0058] In this embodiment, when the operator needs to adjust the position of the slider 22 on the slide rail 21, they must first manually pull the moving rod 26 forward (i.e., pull it away from the front of the housing 1). The moving rod 26 slides forward along the movable groove 25, compressing the first spring 27 and causing the first spring 27 to store elastic potential energy. Simultaneously, the moving rod 26 moves forward, causing the locking rod 28 to move forward synchronously, so that the locking rod 28 completely disengages from the corresponding locking hole 29 on the front of the housing 1. At this time, the slider 22 is released from its locking constraint with the housing 1, and the slider 22 can slide freely in the horizontal direction on the slide rail 21.

[0059] Based on this, the operator pulls the fixing rod 24 to move it left and right along the through groove 23, thereby causing the slider 22 to slide horizontally along the slide rail 21 in the mounting groove at the bottom of the housing 1 to the target position. After the slider 22 moves to the target position, the operator releases the moving rod 26. Under the elastic restoring force of the first spring 27, the moving rod 26 is pushed into the movable groove 25 to retract, and drives the locking rod 28 to move backward synchronously, so that the locking rod 28 is inserted into the corresponding locking hole 29 on the front of the housing 1, completing the locking and fixing between the slider 22 and the housing 1.

[0060] Secondly, please refer to it again. Figure 2 , Figure 4 , Figure 6 , Figure 8 , Figure 9 and Figure 11 The sealing assembly 3 also includes a piston rod 34, which is piston-type inserted into the lower end of the piston cylinder 32, and one end of the piston rod 34 is fixedly connected to the piston plate 33. An air storage groove 35 is provided on the front of the housing 1, and the sealing airbag 31 is located outside the air storage groove 35. A U-shaped groove 36 adapted to the sealing airbag 31 is provided on the side of the door 14 facing the housing 1. An air inlet pipe 37 is fixedly connected to the back of the piston cylinder 32, and one end of the air inlet pipe 37 extends to the outside of the housing 1. An air supply channel 38 is provided between the air storage groove 35 and the piston cylinder 32. A return spring 39 is fixedly connected between the piston cylinder 32 and the piston plate 33.

[0061] In this embodiment, the sealing assembly 3 is used to seal the gap between the box body 1 and the box door 14 by inflating the sealing airbag 31 when the box door 14 is closed.

[0062] Inflation process of sealing airbag 31 (door closed and sealed state)

[0063] After the door 14 is closed, the sealing airbag 31 located on the front of the box body 1 is embedded in the U-shaped groove 36 opened on the back of the door 14.

[0064] When the operator pulls the slider 22 from the side of the housing 1 towards the center of the housing 1 (i.e., moves it closer to the center of the housing 1), the inclined surface on the upper end of the slider 22 gradually contacts the lower end of the piston rod 34 and generates a pressing force. As the slider 22 continues to move towards the center, its inclined surface pushes the piston rod 34 and the piston plate 33 fixedly connected to the upper end of the piston rod 34 to move upward synchronously within the piston cylinder 32, overcoming the elastic force of the return spring 39.

[0065] During the upward movement of the piston plate 33, the air in the upper chamber of the piston cylinder 32 is compressed, increasing the gas pressure in the upper chamber. The compressed air enters the air storage tank 35 through the air supply channel 38 between the piston cylinder 32 and the air storage tank 35, and then enters the sealing airbag 31. After inflation, the sealing airbag 31 further expands and fits tightly against the inner wall of the U-shaped groove 36 on the back of the door 14, thereby forming a reliable gas sealing barrier between the door 14 and the housing 1. This effectively prevents external rainwater, moisture, and dust from entering the housing 1 through the door seam, protecting the internal electrical components from corrosion.

[0066] It should be noted that during the process of slider 22 pushing piston rod 34 upward, since gas supply channel 38 is the only gas passage, gas is unidirectionally forced into sealing airbag 31, thereby ensuring that sealing airbag 31 maintains an inflated state.

[0067] The airbag 31 retracts during the door opening preparation process.

[0068] Before opening the box door 14, the operator must first pull the slider 22 from the middle of the box 1 towards the side of the box 1. As the slider 22 gradually disengages from the pressure support on the lower end of the piston rod 34, the piston rod 34 and the piston plate 33 move downward synchronously under the elastic restoring force of the return spring 39.

[0069] As the piston plate 33 moves downward, the volume of the upper chamber of the piston cylinder 32 increases, and the internal air pressure decreases. Under the action of the pressure difference, the gas in the sealing airbag 31 flows back into the upper chamber of the piston cylinder 32 along the air delivery channel 38. The sealing airbag 31 then contracts, releasing its tight fit with the inner wall of the groove 36, thereby preventing excessive friction between the sealing airbag 31 and the groove 36 when the door is opened, which could damage the sealing airbag 31, and at the same time reducing the door opening resistance.

[0070] Please refer to it again. Figure 6 and Figure 7 The ventilation section 41 includes a ventilation slot 411, which is located on the side of the housing 1. A filter element 412 is fixedly installed at the air inlet end of the ventilation slot 411. A rain cover 413 is fixedly connected to the side of the housing 1 and is located at the ventilation slot 411. The filter element 412 includes a filter frame and a filter screen. The filter frame is bolted to the ventilation slot 411 and the filter screen is fixedly connected inside the filter frame.

[0071] In this embodiment, during the daily use of the electricity metering box, the electrical components installed inside the box 1 generate heat when they operate. The ventilation slots 411 on the side wall of the box 1 keep the air inside and outside the box 1 connected. The cooler outside air enters the box 1 through the ventilation slots 411, and the hot air inside the box 1 rises and is discharged from the exhaust fans 7 at the top of the wiring chamber 12 and the mounting chamber 13, thereby achieving natural convection heat dissipation.

[0072] The filter element 412 (including a filter frame and a filter screen fixedly connected inside the filter frame) installed at the air inlet of the ventilation slot 411 filters the air entering the enclosure 1 from the outside, blocking dust and debris in the outside air and preventing dust from entering the enclosure 1 and causing pollution and corrosion to the electrical components. The rain cover 413 is fixedly connected to the side wall of the enclosure 1 and located outside the ventilation slot 411 to prevent rainwater from directly entering the enclosure 1 along the ventilation slot 411 under the action of wind.

[0073] When the temperature inside the wiring chamber 12 or the installation chamber 13 exceeds a preset threshold (a temperature sensor can be installed inside the chamber, not shown in the figure), the exhaust fan 7 at the top of the corresponding chamber is activated to force the high-temperature gas inside the chamber to be quickly discharged. Outside air is then rapidly replenished into the chamber through the ventilation slot 411, thereby achieving forced convection heat dissipation and improving heat dissipation efficiency.

[0074] Please refer to it again. Figure 4 , Figure 6 and Figure 7 The cleaning unit 42 includes a guide rod 421, which is fixedly connected to the ventilation slot 411. A hollow shell 422 is slidably connected to the guide rod 421, and air vents are arranged in an array on the side of the hollow shell 422 facing the filter element 412. A guide tube 423 is fixedly connected inside the housing 1, and a traction rope 424 is threaded through the guide tube 423. One end of the traction rope 424 is fixedly connected to the hollow shell 422, and the other end is fixedly connected to the slider 22. An air outlet pipe 425 is fixedly connected to the lower end of the piston cylinder 32, and one end of the air outlet pipe 425 is fixedly connected to the hollow shell 422. The air outlet pipe 425 is composed of a rigid pipe and a retractable flexible pipe. The rigid pipe is fixedly embedded in the housing 1, and one end is fixedly connected to the piston cylinder 32, and the other end is fixedly connected to the retractable flexible pipe. One end of the retractable flexible pipe is fixedly connected to the hollow shell 422.

[0075] In this embodiment, the cleaning unit 42 is used to automatically clean the filter screen of the filter element 412 to prevent the filter holes from becoming clogged due to long-term dust accumulation, thus affecting the ventilation and heat dissipation effect.

[0076] The hollow shell 422 is slidably connected to the guide rod 421, which is fixedly installed in the ventilation slot 411, and can slide freely along the vertical direction of the guide rod 421. A counterweight is provided on the bottom surface of the hollow shell 422 to ensure that the hollow shell 422 can slide smoothly downward under its own weight when there is no external force.

[0077] One end of the traction rope 424 is fixedly connected to the hollow shell 422, and the other end passes through the guide tube 423 and extends into the interior of the housing 1, where it is fixedly connected to the slider 22. When the operator pulls the slider 22 along the slide rail 21 towards the center of the housing 1, the slider 22 simultaneously pulls the traction rope 424. After being guided by the guide tube 423, the traction rope 424 pulls the hollow shell 422 upward along the guide rod 421. When the slider 22 moves towards the side of the housing 1, the tension of the traction rope 424 on the hollow shell 422 decreases or disappears, and the hollow shell 422 slides downward along the guide rod 421 to reset under its own weight (and the weight of the counterweight).

[0078] When slider 22 moves toward the side of housing 1, piston rod 34 and piston plate 33 move downward under the action of return spring 39. During the downward movement of piston plate 33, the air in the lower chamber of piston cylinder 32 is compressed, causing the air pressure in the lower chamber to increase. The compressed air in the lower chamber enters the hollow shell 422 through air outlet pipe 425 (composed of a rigid pipe fixedly embedded in housing 1 and a retractable flexible pipe).

[0079] It should be noted that both the intake pipe 37 and the outlet pipe 425 are equipped with one-way valves (not shown in the figure) to ensure that the gas flow direction is unique. Specifically, the one-way valve on the intake pipe 37 allows outside air to enter the lower chamber of the piston cylinder 32 in one direction, and the one-way valve on the outlet pipe 425 allows compressed air in the lower chamber of the piston cylinder 32 to flow into the hollow shell 422 in one direction.

[0080] After compressed air enters the hollow shell 422, it is ejected from the air outlets arranged in an array on the side of the hollow shell 422 toward the filter element 412, forming an impact airflow.

[0081] Simultaneously, as the slider 22 moves to the side of the housing 1, the hollow shell 422 slides downward along the guide rod 421 under its own gravity. That is, throughout the entire process of the slider 22 moving to the side, the hollow shell 422 continuously ejects gas from the air outlet while moving downwards. The ejected airflow directly washes against the filter screen of the filter element 412, blowing away dust particles accumulated on the outside of the filter screen, thereby achieving the purpose of automatically cleaning the filter screen and preventing filter pore clogging.

[0082] When slider 22 moves back towards the center of housing 1, traction rope 424 pulls hollow shell 422 upward along guide rod 421 to reset, preparing for the next cleaning stroke. During this process, piston plate 33 moves upward to compress upper chamber of piston cylinder 32, and lower chamber draws in outside air through intake pipe 37 to replenish it, storing gas for the next jet cleaning.

[0083] In this way, each time the operator pulls the slider 22 before opening or closing the door, an automatic cleaning operation of the filter element 412 is completed simultaneously, without the need for additional operation, which is efficient and convenient.

[0084] Please refer to it again. Figure 1 and Figure 5 The limiting component 5 includes a sleeve rod 51, which is fixedly connected to the fixed rod 24. The upper end of the sleeve rod 51 is slidably inserted into a limiting rod 52, and a force-bearing rod 53 is fixedly connected to the limiting rod 52. A guide groove 54 is provided on the front of the housing 1.

[0085] In this embodiment, the limiting component 5 is used to lock and limit the door 14 when the door 14 is closed, so as to prevent the door 14 from being opened accidentally due to vibration, wind or accidental contact, thereby avoiding external dust, moisture and other substances from entering the interior of the enclosure 1 and interfering with the power components.

[0086] When the operator pulls the fixing rod 24 towards the center of the housing 1 (i.e., when the housing door 14 is closed and sealing and limiting are required), the fixing rod 24 drives the sleeve rod 51 and the limiting rod 52 to move synchronously towards the center. During this process, the force-bearing rod 53, which is fixedly connected to the limiting rod 52, slides along the guide groove 54 opened on the front of the housing 1. The guide groove 54 is an inclined guide groove 54 (its trajectory extends inclinedly from bottom to top). As the force-bearing rod 53 slides along the guide groove 54, it gradually moves upward under the guidance of the guide groove 54, synchronously driving the limiting rod 52 to extend upward relative to the sleeve rod 51.

[0087] When the fixed rod 24 moves to the locked position, the limit rod 52 rises to the highest position, and its upper part extends to the front of the box door 14, forming a blocking limit on the box door 14, preventing the box door 14 from being flipped forward and opened, thereby ensuring that the box door 14 remains locked in the closed state, effectively preventing external dust and moisture from entering the box 1 and interfering with the electrical components after the box door 14 is accidentally opened.

[0088] When the operator needs to open the cabinet door 14, the fixing rod 24 must first be pulled towards the side of the cabinet body 1. The force-bearing rod 53 slides in the opposite direction along the guide groove 54 and gradually moves downward under the guidance of the guide groove 54, simultaneously causing the limiting rod 52 to retract and reset relative to the sleeve rod 51. After the limiting rod 52 descends, its upper end retracts below the front of the cabinet door 14, releasing the obstruction to the cabinet door 14, allowing the cabinet door 14 to be freely flipped open.

[0089] Please refer to it again. Figure 10 The piston rod 34 has a moving groove 61 inside, and a lifting rod 62 is slidably connected inside the moving groove 61. A support ring 63 is fixedly connected to the inner wall of the moving groove 61, and a second spring 64 is fixedly connected between the support ring 63 and the lifting rod 62. A sliding groove 65 is opened at the lower end of the moving groove 61, and a lifting block 66 is slidably connected inside the sliding groove 65. The lifting block 66 is fixedly connected to the lifting rod 62, and a second permanent magnet 67 is fixedly connected to both ends of the lifting block 66.

[0090] In this embodiment, since the sealing airbag 31 may leak a small amount of gas during long-term use, in order to ensure that the sealing airbag 31 has sufficient expansion after each door is closed, the present invention is provided with an automatic air replenishment structure.

[0091] When the slider 22 moves to its extreme position closest to the side of the housing 1, the piston rod 34 is at its lowest position. At this time, the first permanent magnet 210 fixedly connected to both sides of the slider 22 and the second permanent magnet 67 fixedly connected to both ends of the lifting block 66 are directly opposite each other in the horizontal direction, generating a magnetic attraction between them. Under the action of this magnetic attraction, the lifting block 66 slides downward along the slide groove 65, driving the lifting rod 62 to move downward along the moving groove 61, and compressing the second spring 64 set between the support ring 63 and the lifting rod 62.

[0092] After the lifting rod 62 moves down, its upper end disengages from the inner wall of the upper end of the moving groove 61, and the upper end port of the moving groove 61 is opened. At this time, the upper chamber of the piston cylinder 32 is connected to the external atmospheric environment through the moving groove 61 and the sliding groove 65. Outside air can enter the upper chamber of the piston cylinder 32 through this path to replenish the gas lost during long-term use, ensuring that enough gas is compressed and delivered to the sealing airbag 31 when the piston plate 33 moves up, thus ensuring the expansion effect of the sealing airbag 31.

[0093] When the operator pulls the slider 22 from the side towards the center of the housing 1, the first permanent magnet 210 and the second permanent magnet 67 gradually shift apart in the horizontal direction, and the magnetic attraction disappears. Under the elastic restoring force of the second spring 64, the lifting block 66 slides upward along the slide groove 65, and drives the lifting rod 62 to move upward synchronously. The upper end of the lifting rod 62 re-abuts against the upper inner wall of the moving groove 61, and the upper end of the moving groove 61 is sealed. At this time, the communication channel between the upper chamber of the piston cylinder 32 and the outside atmosphere is cut off, and the pressurized gas in the upper chamber can only enter the gas storage groove 35 along the gas delivery channel 38, thereby ensuring the normal expansion of the sealing airbag 31.

[0094] The working principle of this invention is as follows:

[0095] After the operator pulls the moving rod 26 to disengage the locking rod 28 from the locking hole 29, they push the fixing rod 24 along the through groove 23, causing the slider 22 to slide towards the center of the housing 1 on the slide rail 21. The inclined surface of the slider 22 pushes the piston rod 34 and piston plate 33 upward, sending the compressed air in the upper chamber of the piston cylinder 32 into the sealing airbag 31 through the air supply channel 38 to inflate it and tightly fit it against the U-shaped groove 36 of the housing door 14 to achieve a seal. At the same time, the slider 22 pulls the hollow shell 422 upward along the guide rod 421 through the traction rope 424, and the limiting rod 52 rises to the front of the housing door 14 under the sliding action of the force rod 53 along the guide groove 54 to block and limit it; when the slider 22 slides to the side of the housing 1, the piston rod 34 The piston plate 33 moves downward under the action of the return spring 39, the sealing airbag 31 contracts and releases the seal, the hollow shell 422 moves downward under the action of gravity, and the compressed air in the lower chamber of the piston cylinder 32 enters the hollow shell 422 through the air outlet pipe 425 and is ejected from the air outlet to flush the filter element 412. At the same time, the limit rod 52 descends and releases the limit on the box door 14. In addition, when the slider 22 slides to the side limit position, the first permanent magnet 210 and the second permanent magnet 67 attract each other, causing the lifting rod 62 to move downward, opening the port of the moving slot 61 to allow outside air to enter the upper chamber of the piston cylinder 32 to achieve automatic air replenishment. After the slider 22 leaves the limit position, the magnetic attraction disappears, and the lifting rod 62 moves upward under the action of the second spring 64 to close the air replenishment channel.

[0096] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0097] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An aluminum alloy single-phase power metering box resistant to external interference, characterized in that: Includes a housing (1), in which a partition (11) is fixedly connected and is divided into a wiring chamber (12) and an installation chamber (13) by the partition (11). The front end of the housing (1) is hinged with a door (14) at the position corresponding to the wiring chamber (12) and the installation chamber (13). Movable components (2), both of which are located at the lower end of the housing (1); The sealing assembly (3) is provided on the box body (1). Each of the two sealing assemblies (3) includes a sealing airbag (31) provided on the front of the box body (1), a piston cylinder (32) fixedly connected to the lower end of the box body (1), and a piston plate (33) slidably connected in the piston cylinder (32). The piston plate (33) is connected to the moving assembly (2) in a transmission. Ventilation components (4), the two ventilation components (4) are respectively arranged on the left and right sides of the box (1), each including a ventilation part (41) opened on the side wall of the box (1) and a cleaning part (42) arranged in the ventilation part (41), the cleaning part (42) being connected to the moving component (2) in a transmission. Limiting components (5), two of the limiting components (5) are respectively disposed at the front end of the two boxes (1) for locking and limiting the box door (14) when the box door (14) is closed.

2. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 1, characterized in that: Exhaust fans (7) are installed at the upper ends of both the wiring chamber (12) and the installation chamber (13).

3. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 1, characterized in that: The moving component (2) includes a slide rail (21), which is fixedly installed in the mounting groove at the lower end of the housing (1). A slider (22) is slidably connected to the slide rail (21). A through groove (23) is provided at the lower end of the front of the housing (1). A fixed rod (24) is fixedly connected to one side of the slider (22), and the fixed rod (24) extends along the through groove (23) to the outside of the housing (1). A movable groove (25) is provided at the front end of the fixed rod (24), and a moving rod (26) is slidably inserted into one end of the movable groove (25). A first spring (27) is fixedly connected between the moving rod (26) and the inner wall of the movable groove (25). A locking rod (28) is fixedly connected to the front end of the moving rod (26). A lock hole (29) is provided on the front of the housing (1). A first permanent magnet (210) is fixedly connected to both sides of the slider (22).

4. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 1, characterized in that: The sealing assembly (3) also includes a piston rod (34), which is piston-type inserted into the lower end of the piston cylinder (32), and one end of the piston rod (34) is fixedly connected to the piston plate (33). The front of the box body (1) is provided with an air storage groove (35), and the sealing airbag (31) is located outside the air storage groove (35). The side of the box door (14) facing the box body (1) is provided with a U-shaped groove (36) that matches the sealing airbag (31). The back of the piston cylinder (32) is fixedly connected to an air inlet pipe (37), and one end of the air inlet pipe (37) extends to the outside of the box body (1). An air supply channel (38) is provided between the air storage groove (35) and the piston cylinder (32). A return spring (39) is fixedly connected between the piston cylinder (32) and the piston plate (33).

5. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 3, characterized in that: The ventilation section (41) includes a ventilation slot (411), which is located on the side of the housing (1). A filter element (412) is fixedly installed at the air inlet end of the ventilation slot (411). A rain cover (413) is fixedly connected to the side of the housing (1) and is located at the ventilation slot (411).

6. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 5, characterized in that: The filter element (412) includes a filter frame and a filter screen. The filter frame is bolted to the ventilation slot (411), and the filter screen is fixedly connected inside the filter frame.

7. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 5, characterized in that: The cleaning unit (42) includes a guide rod (421), which is fixedly connected to the ventilation slot (411). A hollow shell (422) is slidably connected to the guide rod (421), and air vents are arranged in an array on the side of the hollow shell (422) facing the filter element (412). A guide tube (423) is fixedly connected inside the box (1), and a traction rope (424) is threaded along the guide tube (423). One end of the traction rope (424) is fixedly connected to the hollow shell (422), and the other end is fixedly connected to the slider (22). The lower end of the piston cylinder (32) is fixedly connected to an air outlet pipe (425), and one end of the air outlet pipe (425) is fixedly connected to the hollow shell (422).

8. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 7, characterized in that: The air outlet pipe (425) consists of a rigid pipe and a retractable hose. The rigid pipe is fixedly embedded in the housing (1), and one end is fixedly connected to the piston cylinder (32), while the other end is fixedly connected to the retractable hose. One end of the retractable hose is fixedly connected to the hollow shell (422).

9. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 3, characterized in that: The limiting component (5) includes a sleeve rod (51), which is fixedly connected to the fixed rod (24). The upper end of the sleeve rod (51) is slidably inserted into a limiting rod (52), and a force-bearing rod (53) is fixedly connected to the limiting rod (52). A guide groove (54) is provided on the front of the box (1).

10. The aluminum alloy single-phase power metering box resistant to external interference as described in claim 4, characterized in that: The piston rod (34) has a moving groove (61) inside, and a lifting rod (62) is slidably connected inside the moving groove (61). A support ring (63) is fixedly connected to the inner wall of the moving groove (61), and a second spring (64) is fixedly connected between the support ring (63) and the lifting rod (62). A sliding groove (65) is opened at the lower end of the moving groove (61), and a lifting block (66) is slidably connected inside the sliding groove (65). The lifting block (66) is fixedly connected to the lifting rod (62), and a second permanent magnet (67) is fixedly connected to both ends of the lifting block (66).

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