A split meter box with external protection flaps

Abstract

The application relates to the technical field of electric meter boxes, and discloses a separated electric meter box with an external protection folding plate, which comprises a box body of an electric meter box, a folding plate arranged on the outer side of the box body, the box body being fixedly installed on the inner side of the folding plate, at least a part of the folding plate being located above the top of the box body, at least a part of the folding plate being located behind the back of the box body, and a gap between the folding plate and the box body forming a bending air channel; a concave arc plate is arranged at the center part of the bending part of the folding plate, the concave arc plate is recessed towards the inner side of the folding plate, the inner side of the concave arc plate forms an arc flow guide surface at the bending part, and the outer side of the concave arc plate forms a drainage channel on the mounting surface of the folding plate. The problems that the water blocking structure of the existing electric meter box is single, rainwater is prone to flowing down along the back of the box body or seeping in through the gap, and effective air-sand / salt-mist gas-solid separation means is lacked, sand particles are attached to electrical elements, heat dissipation is affected, and insulation is influenced are solved.

Description

Technical Field

[0001] This invention relates to the field of meter box technology, specifically to a detachable meter box with an external protective folding plate. Background Technology

[0002] Electricity meter boxes are outdoor protective devices for electricity meters and related electrical components, which are exposed to complex environments such as rain, sandstorms, salt spray, and temperature differences for extended periods. Existing protective designs for electricity meter boxes mostly focus on rain shelters on the top of the box, door sealing strips, or partial sealing structures, resulting in relatively simple forms of protection.

[0003] Regarding waterproofing, some card-operated meter boxes have protective edges, coverings, and sealing strips around the card slot to prevent rainwater and dust from entering. However, gaps still exist between the screw-on or flip-top cover and the box body. After prolonged use, the cover can easily loosen, allowing rainwater and dust to seep into the box from around the cover, potentially causing short circuits and other safety issues. Some outdoor meter boxes are designed with a sloping or wedge-shaped top to guide rainwater, but when rain is accompanied by strong winds, rainwater can still easily drift into the box or flow down the back of the box, causing dampness inside. Some waterproof meter boxes have multiple grooves, waterproof strips, and waterproof sealant between the top cover and the box body. While this improves the waterproofing performance at the top cover joint, its protection is mainly concentrated on the top, and its ability to prevent seepage on the back of the box remains limited. In addition, problems such as aging and detachment of the box body sealing strips and blockage of drainage holes can also cause outdoor meter boxes to lose their waterproof, dustproof, and condensation-proof capabilities. Moisture intrusion accelerates the oxidation and aging of electrical components.

[0004] In terms of protection against wind, sand, and salt spray, existing meter boxes generally use ventilation holes, filters, or louvers for dust prevention. However, when outdoor filters are left uncleaned for extended periods, dust can clog the mesh, reducing the meter box's heat dissipation function. Sand particles are mainly composed of silicon dioxide, which is hard and has a high melting point. Once it enters between electrical contacts, it can cause abnormal contact gaps, increased contact resistance, and overheating, potentially leading to terminal burn-out. In windy and sandy areas, if the distribution box's dustproof performance is insufficient, sand and dust can enter the box and cover the contacts and wiring, easily causing short circuits and tripping of air circuit breakers. In environments with salt spray, high humidity, and drastic temperature differences, poorly sealed inner walls of the box are prone to condensation. Moisture accumulation at the terminals can lead to leakage and increased contact resistance. Traditional meter boxes generally have low dust and water resistance ratings, making them prone to aging and cracking in harsh environments such as sandstorms, heavy rain, and salt spray, further increasing the risk of damage to internal components. It is evident that simply relying on filters or louvers is insufficient to effectively separate sand and dust from airflow. Sand particles and salt spray droplets may still adhere to the surface of electrical components with the airflow, affecting heat dissipation and insulation performance.

[0005] In summary, the existing water-blocking structure of the meter box is relatively simple and cannot simultaneously meet the waterproof requirements of the top and back of the box. At the same time, it lacks effective gas-solid separation methods against wind, sand and salt spray, which makes it easy for sand and salt spray droplets to penetrate the box and adhere to electrical components, affecting the long-term stable operation of the meter box in harsh outdoor environments. Summary of the Invention

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a detachable meter box with an external protective folding plate. The external folding plate forms a curved air passage between itself and the box body, and the concave arc plate's arc-shaped guide surface ensures rain and water drainage from the top and back. Simultaneously, centrifugal force is used to separate wind-blown sand and salt spray droplets, preventing sand particles from adhering to the back of the box. This solves the problems of existing meter boxes having a simple water-blocking structure, allowing rainwater to easily flow down the back of the box or seep in through gaps, and lacking effective wind-blown sand / salt spray gas-solid separation methods, leading to sand particles adhering to electrical components and affecting heat dissipation and insulation.

[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A detachable meter box with an external protective folding plate includes a box body. A folding plate is provided on the outer side of the box body. The box body is fixedly installed on the inner side of the folding plate. At least a portion of the folding plate is located above the top of the box body, and at least a portion of the folding plate is located at the rear of the box body. The gap between the folding plate and the box body forms a bent air passage. A concave arc plate is provided at the center of the bend of the folding plate. The concave arc plate is recessed inward. The inner side of the concave arc plate forms an arc-shaped guide surface at the bend. The outer side of the concave arc plate forms a drainage channel on the mounting surface of the folding plate.

[0008] Preferably, at least a portion of the concave arc plate at the rear of the housing is configured as a diversion structure, and the portion of the folded plate at the rear of the housing other than the concave arc plate is the edge of the folded plate; the cross-section of the concave arc plate in the diversion structure alternately has inner and outer platforms along the horizontal direction, the inner platform protrudes inward relative to the edge of the folded plate, and the outer platform protrudes outward relative to the inner platform, with the outer platform protruding to a position flush with the edge of the folded plate at most; the inner and outer platforms are connected by an inclined slope or vertical steps, the outer side of the inner platform forms a diversion waterway, and the inner side of the outer platform forms a diversion airway; a drainage structure is provided on every other diversion waterway, and the drainage structure is located on both sides of the diversion waterway facing the diversion airway.

[0009] Preferably, the box body is provided with side panels on both sides, the side panels are detachably fixed to the inside of the folding plate, and the side panels are provided with wire through holes.

[0010] Preferably, the folding plate is fixed to the surface of the mounting base, which is a wall.

[0011] Preferably, the folding plate protrudes outward relative to the box body on both the front and rear sides in the thickness direction, on both the left and right sides in the length direction, and on both the top and bottom sides in the height direction, meaning that the folding plate covers the box body in the thickness, height, and length directions.

[0012] Preferably, a heat dissipation hole is provided on the back of the box, and a screen is provided on the outside of the heat dissipation hole.

[0013] Preferably, the inlet of the drainage structure protrudes into the diversion channel.

[0014] Preferably, a flow-blocking structure is provided on each branch waterway with a drainage structure, and the flow-blocking structure blocks the branch waterway.

[0015] Preferably, the flow interception structure is a movable flow interception plate structure, the flow interception structure includes a flow interception plate, a rotating connection part is provided between the flow interception plate and the baffle plate, the rotating connection part is located below the inner platform, an elastic torsion element is provided inside the flow interception structure, the elastic torsion element provides elastic potential energy to the flow interception plate to rotate towards the bottom of the diversion channel; the flow interception plate includes an extension part provided in the diversion channel, when the flow interception plate is attached to the bottom of the diversion channel, one side of the extension part is attached to the inner side of the outer platform.

[0016] Preferably, the flow-blocking structure is an integrated base plate structure, which is a base plate integrated with the inner platform.

[0017] (III) Beneficial Effects Compared with the prior art, the present invention provides a detachable meter box with an external protective folding plate, which has the following beneficial effects: 1. This externally protected, detachable meter box uses a folding plate to secure the box. First, the space created by the upper and lower parts of the folding plate shields the box from rainwater, and rainwater falling on the top of the box can be discharged through the drainage channel formed on the outer side of the concave arc plate on the folding plate, preventing it from seeping to the back of the box. Second, when sand or salt spray blows horizontally towards the box, the airflow is forced to change direction within the bent air passage between the folding plate and the box, forming an L-shaped channel to remove sand and dust. Furthermore, the arc-shaped guide formed on the inner side of the concave arc plate allows the airflow to form an arc-shaped path at the bend. Using centrifugal force, heavier sand particles or salt spray droplets are thrown towards the inner wall of the folding plate, while clean air adheres to the back of the box, preventing sand from adhering to the back of the box.

[0018] 2. This externally protected, detachable meter box utilizes a diversion structure in the lower half of the concave arc plate. Firstly, the diversion structure forms diversion air ducts and diversion water channels on the inner and outer sides of the folded plate, respectively. On one hand, the diversion air ducts enhance local airflow velocity, preventing sand accumulation; on the other hand, their multi-level undulating structure strengthens the structural strength of the folded plate. Secondly, during periods of heavy rainfall, water from the diversion water channels overflows from the drainage structure, cleaning adjacent diversion air ducts.

[0019] 3. The external protective baffle-type meter box, by setting up a baffle plate, firstly, when there is too much accumulated material in the diversion channel where the baffle plate is set, the elastic potential energy of the elastic torsion element is overcome under the action of gravity, causing the baffle plate to open downward, thereby discharging the accumulated material; secondly, the baffle plate can be manually opened by pulling a rod by setting a hook at the bottom of the baffle plate; finally, part of the baffle plate is exposed in the diversion channel, and the wind force, accumulated sand, or water falling from the drainage mechanism can be used to assist the baffle plate in opening the channel. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0021] Figure 2 This is a side view of Embodiment 1 of the present invention after the side panels have been removed.

[0022] Figure 3 This is a schematic diagram of the structure of the folding plate according to Embodiment 1 of the present invention.

[0023] Figure 4 For the present invention Figure 3 A sectional view of section AA.

[0024] Figure 5 This is a schematic diagram of the structure of the back of the folding plate in Embodiment 1 of the present invention.

[0025] Figure 6 This is a schematic diagram of the folded plate structure in the drainage scheme of Embodiment 2 of the present invention.

[0026] Figure 7 For the present invention Figure 6 A sectional view of section BB.

[0027] Figure 8 This is a schematic diagram of the folded plate structure in the second drainage scheme of Embodiment 2 of the present invention.

[0028] Figure 9 This is a schematic diagram of the structure of the folding plate in Embodiment 3 of the present invention.

[0029] Figure 10 For the present invention Figure 9 A magnified view of part D in the middle.

[0030] Figure 11 For the present invention Figure 9 A sectional view of the CC section.

[0031] In the diagram: 1. Box body; 2. Folded plate; 21. Concave arc plate; 22. Fixing frame; 23. Bending air duct; 24. Drainage channel; 20. Folded plate edge; 211. Inner platform; 212. Outer platform; 231. Diverting air duct; 241. Diverting water channel; 25. Drainage structure; 26. Intercepting structure; 261. Intercepting plate; 262. Rotating connection part; 263. Extension part; 3. Side plate; 31. Wiring hole; 91. Mounting base. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] Example 1: This embodiment provides a detachable meter box with an external protective folding plate, which has the following technical features.

[0037] Please see Figures 1-5 A detachable meter box with an external protective folding plate includes a box body 1, a folding plate 2 is provided on the outside of the box body 1, the box body 1 is fixedly installed on the inside of the folding plate 2, at least a part of the folding plate 2 is located above the top of the box body 1, at least a part of the folding plate 2 is located at the rear of the back of the box body 1, and the gap between the folding plate 2 and the box body 1 forms a bent air passage 23. The folded plate 2 has a concave arc plate 21 at the center of the bend. The concave arc plate 21 is recessed towards the inside of the folded plate 2. The inner side of the concave arc plate 21 forms an arc-shaped guide surface at the bend. The outer side of the concave arc plate 21 forms a drainage channel 24 on the mounting surface of the folded plate 2.

[0038] Furthermore, such as Figure 2 As shown, a fixing frame 22 is also provided on the folding plate 2. The fixing frame 22 is used to fix the box body 1. The fixing frame 22 is fixed to the box body 1 by bolts. The fixing frame 22 is fixed to the folding plate 2 by bolts or integral molding.

[0039] Furthermore, such as Figure 1 As shown, in order to prevent sand from entering the box 1 from the side, side plates 3 are provided on both sides of the box 1. The side plates 3 are detachably fixed to the inside of the folding plate 2 by bolts, and wire holes 31 are provided on the side plates 3.

[0040] Furthermore, such as Figure 1 As shown, the folding plate 2 is fixed to the mounting base 91 by bolts. The mounting base 91 is a wall or other mounting surface.

[0041] Furthermore, such as Figure 1 As shown, the horizontal direction perpendicular to the surface of the mounting base 91 is the thickness direction, the horizontal direction parallel to the surface of the mounting base 91 is the length direction, and the vertical direction parallel to the mounting base 91 is the height direction. The folding plate 2 protrudes outward relative to the box body 1 on both the front and rear sides in the thickness direction, the folding plate 2 protrudes outward relative to the box body 1 on both the left and right sides in the length direction, and the folding plate 2 protrudes outward relative to the box body 1 on both the top and bottom sides in the height direction. In other words, the folding plate 2 covers the box body 1 in the thickness direction, the height direction, and the length direction.

[0042] Furthermore, to address the issue that the folding plate 2 only protects the top and back of the box body 1, and that the gaps in the front of the box body 1 door may still become channels for rainwater intrusion under slanted wind and rain conditions, a waterproof edge is installed around the opening of the box body 1. When the box door is closed, its inner wall abuts against the waterproof edge, and a sealing gasket is installed on the waterproof edge to eliminate the gap between the box door and the waterproof edge. At the same time, a soft rubber layer is installed on the top of the box door, so that the box door is sealed and protected all around, thereby preventing rainwater from seeping into the interior through the gaps between the box door and the box body 1 and improving the waterproof capability of the front of the box body 1.

[0043] Furthermore, in order to solve the problem of an annular gap between the inner wall of the wire hole 31 and the outer sheath of the cable when the cable is introduced or led out, a removable rubber sealing gasket or waterproof sleeve is installed at the wire hole 31. When the cable passes through, the inner wall of the sealing gasket fits tightly against the outer wall of the cable. When the wire hole 31 is not in use, it is sealed with the sealing gasket, thus achieving the effect of sealing the gap between the wire hole 31 and the cable.

[0044] Furthermore, in order to address the issue that while the folding plate 2 covering the back of the housing 1 achieves sand and dust removal through the bent air passage 23, the obstruction by the folding plate 2 may affect the natural heat dissipation of the back of the housing 1, heat dissipation holes are opened on the back of the housing 1, and a semi-circular screen is installed on the outside of the heat dissipation holes. This allows the clean air separated by the arc-shaped air passage 23 to flow through the heat dissipation holes and exchange heat with the back of the housing 1. At the same time, the semi-circular screen intercepts large dust particles remaining in the air, thus achieving the effect of maintaining ventilation and heat dissipation inside the housing 1 while ensuring waterproofing and dustproofing.

[0045] Furthermore, to address the issue that when the folding plate 2 is fixed to the mounting base 91 with bolts, there is a gap between the bolt holes and the contact surface of the mounting base 91, which could allow rainwater to seep into the gap between the folding plate 2 and the wall and corrode the folding plate and bolts, a sealing strip is installed on the contact surface between the folding plate 2 and the mounting base 91, a rubber gasket is added at the bolt connection, and sealant is applied to the contact area between the folding plate 2 and the mounting base 91. This achieves the effect of preventing rainwater from seeping in from the connection between the folding plate 2 and the mounting base 91.

[0046] Furthermore, in order to address the issue of the high requirements for flame retardancy, insulation, and anti-aging performance of the materials used in the enclosure 1, which are exposed to ultraviolet rays, rain, salt spray, and sandstorms for long periods of time, the enclosure 1 is made of SMC fiberglass or PC insulating material, the folding plate 2 is made of stainless steel, and a waterproofing agent layer is applied to the outer surface of the enclosure 1. This achieves the effect of improving the overall protection level of the enclosure 1 and extending its service life from the material level.

[0047] The working principle of the detachable meter box with external protective baffle in this embodiment is as follows: Under rainfall conditions, the portion of the folding plate 2 located above the top of the housing 1 provides shelter for the housing 1. Rainwater falling on the top surface of the folding plate 2 is discharged downwards along the drainage channel 24 formed on the outer side of the concave arc plate 21 at the bend, preventing it from seeping to the back of the housing 1. The sealing gasket provided at the cable hole 31 on the side plate 3 seals the annular gap between the cable and the cable hole 31. Under conditions of horizontal blowing sand or salt spray, the airflow carrying sand particles or salt spray droplets enters the bent air passage 23 between the baffle plate 2 and the housing 1. Due to the L-shaped bend of the bent air passage 23, the airflow is forced to change direction within the passage. When the airflow passes the arc-shaped guide surface formed on the inner side of the concave arc plate 21, an arc-shaped flow path is formed at the bend. Utilizing the centrifugal force effect, larger sand particles or salt spray droplets are thrown towards the inner wall of the baffle plate 2 and settle along it, while smaller clean air continues to flow along the back of the housing 1. The heat dissipation holes on the back of the housing 1, together with the semi-circular screen, perform secondary interception of residual particles. Clean air enters the back area of ​​the housing 1 through the heat dissipation holes to complete heat exchange, achieving synergy between sand and dust removal and ventilation. A small amount of water accumulation at the bottom of the bent air passage 23 and the separated water vapor are discharged through the drain holes at the bottom of the baffle plate 2 and the guide slope, avoiding long-term retention.

[0048] In summary, this externally protected folding plate-type meter box, by fixing the box body 1 with the folding plate 2, firstly, the space formed by the upper and lower parts of the folding plate 2 can shield the box body 1 from rainwater, and the rainwater falling on the top of the box body 1 can be discharged through the drainage channel 24 formed on the outer side of the concave arc plate 21 on the folding plate 2, without seeping into the back of the box body 1. Secondly, when wind, sand or salt spray blows horizontally towards the box body 1, the airflow is forced to change direction in the bent air passage 23 between the folding plate 2 and the box body 1, forming an L-shaped channel to achieve sand and dust removal. Furthermore, the arc-shaped guide formed on the inner side of the concave arc plate 21 can make the airflow form an arc-shaped path at the bend. Using centrifugal force, heavier sand particles or salt spray droplets will be thrown towards the inner wall of the folding plate 2, while clean air will adhere to the back of the box body 1, preventing wind and sand from adhering to the back of the box body 1.

[0049] Example 2: Even after the above improvements, the meter box with the folded plate structure still has the following problems. On the one hand, the rigidity of the folded plate 2 structure is insufficient. Outdoor meter boxes are subjected to wind pressure for a long time. The existing folded plate 2 structure is mostly flat or simple arc, which has limited wind vibration resistance. Large-span folded plates 2 are prone to deformation. On the other hand, there is a problem of secondary sand flying. If the separated sand particles adhere to the inner wall of the folded plate 2, they may be rolled up again and re-adhere to the back of the meter box in windy weather.

[0050] This embodiment provides a detachable meter box with an external protective folding plate, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] Please see Figures 6-8 At least a portion of the concave arc plate 21 at the rear of the box body 1 is configured as a diversion structure, and the portion of the folding plate 2 at the rear of the box body 1 other than the concave arc plate 21 is the folding plate edge 20. In the diversion structure, the inner concave arc plate 21 is alternately provided with inner platform 211 and outer platform 212 in the horizontal direction. The inner platform 211 protrudes inward relative to the edge 20 of the folded plate, and the outer platform 212 protrudes outward relative to the inner platform 211. The outer platform 212 protrudes to a position flush with the edge 20 of the folded plate at most. The inner platform 211 and the outer platform 212 are connected by an inclined slope or vertical steps. A diversion channel 241 is formed on the outer side of the inner platform 211, and a diversion air duct 231 is formed on the inner side of the outer platform 212. Each of the multiple branch waterways 241 is provided with a drainage structure 25 at every other branch waterway 241. The drainage structure 25 is located on both sides of the branch waterway 241 facing the branch airway 231.

[0052] As a drainage scheme one, such as Figure 6 As shown, the inlet of the drainage structure 25 protrudes into the diversion channel 241, thereby guiding the water flow into the diversion air duct 231 for cleaning.

[0053] As a second drainage scheme, such as Figure 8 As shown, each branch channel 241 equipped with a drainage structure 25 is provided with an intercepting structure 26. The intercepting structure 26 blocks the branch channel 241. When the rainfall is heavy, the water level in the branch channel 241 rises, causing the water to be discharged from the side drainage structure 25. Compared to having the inlet of the drainage mechanism protrude directly into the branch channel 241, the intercepting structure 26 ensures that the water in the branch channel 241 is stabilized, and the branch channel 231 is only cleaned when the water volume is high.

[0054] Furthermore, such as Figure 8 As shown, the intercepting structure 26 is a base plate that is integrated with the diversion channel 241.

[0055] Furthermore, to address the stress concentration issue caused by the abrupt change in cross-section between the flow distribution structure and the edge 20 of the folded plate 2 at the rear of the box body 1, a rounded transition is provided at the sloping surface or vertical step between the inner platform 211 and the outer platform 212. Continuous reinforcing ribs are also provided at the connection between the edge 20 of the folded plate and the flow distribution structure. This ensures that the lateral load generated by wind pressure is evenly transmitted along the undulating structure, preventing fatigue cracking of the folded plate 2 due to localized stress concentration. This achieves the effect of ensuring the structural continuity of the flow distribution structure and improving the wind-induced vibration resistance of the folded plate 2. The multi-level undulating cross-section helps to decompose and transfer the wind load along the concave direction, reducing local bending moments.

[0056] Furthermore, in order to solve the problem that the separated sand particles may be re-rolled and re-entrained in strong winds after falling into the diversion duct 231, an anti-adhesion coating is provided on the inner wall of the diversion duct 241. This allows the sand particles to settle in the sand accumulation trough and be carried out by the water flow after being thrown into the diversion duct 231 by centrifugal force, reducing the adhesion of sand particles to the inner wall of the baffle 2 and achieving the effect of suppressing secondary sand particle entrainment and preventing sand particles from re-adhering to the back of the box 1.

[0057] Furthermore, in order to solve the problem that the inlet of the drainage structure 25 is easily blocked by sand and foreign objects in windy and sandy weather, a detachable filter or grille is installed at the inlet of the drainage structure 25. The filter mesh has a hole diameter smaller than the width of the internal flow channel of the drainage structure 25 and can be removed and cleaned. While ensuring that rainwater can pass through, it intercepts large sand particles and debris, thereby improving the anti-clogging ability of the drainage structure 25 and extending the service life of the diversion structure cleaning function.

[0058] Furthermore, in order to address the problem that high-speed airflow in the diversion duct 231 may blow water or sand particles from the diversion channel 241 back into the diversion duct 231 under strong wind conditions, causing backflow of wind and sand, elastic baffles or one-way valves are installed at the connection between the drainage structure 25 or the diversion channel 241 and the diversion duct 231. The elastic baffle is pushed open by the water flow when the water level in the diversion channel 241 rises, and automatically closes when strong winds act from the diversion duct 231 side, thus achieving the effect of preventing backflow of wind and sand and ensuring one-way drainage of the drainage structure 25.

[0059] Furthermore, to address the issue of potential overall bending deformation of the outer surface of the folded plate 2 under long-span conditions, several transverse and longitudinal reinforcing ribs are installed along the length of the folded plate 2 on the outer side of the folded plate edge 20. The transverse reinforcing ribs are spaced apart along the length of the folded plate edge 20, and the longitudinal reinforcing ribs connect the folded plate edge 20 to the outer platform 212 in the diversion structure, forming an integral load-bearing frame with the diversion structure. This significantly improves the overall stiffness and wind pressure resistance of the folded plate 2. The concave undulating structure and the continuous reinforcing ribs work together to effectively disperse lateral wind loads and suppress deformation.

[0060] Furthermore, in order to solve the problem that the water level in the diversion channel 241 is insufficient when the rainfall is small, which leads to the long-term inactivity of the drainage structure 25 and the accumulation of sand, the interception structure 26 is set as a baffle with an interchangeable height or made of elastic material, so that the diversion channel 241 can overflow from the drainage structure 25 when the water level reaches the set height. This achieves the effect of automatically adjusting the drainage timing of the diversion channel 241 according to different rainfall intensities, and taking into account both daily sand cleaning and heavy rain flood discharge.

[0061] Furthermore, in order to solve the problem of wind vibration transmitted by the rigid connection between the folding plate 2 and the fixed frame 22, an elastic buffer pad or vibration damping ring is set at the connection between the folding plate 2 and the fixed frame 22. The vibration of the folding plate 2 caused by wind pressure is partially absorbed by the buffer pad, reducing the transmission of wind vibration to the box 1. This achieves the effect of ensuring the stable operation of the metering components inside the meter box and reducing wind vibration noise.

[0062] Based on Embodiment 1, the externally protected folding plate of this separate meter box is configured as a current diversion structure with at least a portion of the concave arc plate 21 located at the rear of the box body 1. Its working principle is as follows: Under windy and sandy conditions, the sand-laden airflow enters the bent air passage 23 between the baffle plate 2 and the box body 1, and flows along the diversion air passage 231 in the area of ​​the concave arc plate 21 of the diversion structure. The inner platform 211 and the outer platform 212 are arranged alternately in the horizontal direction, so that the diversion air passage 231 forms a multi-level undulating cross-sectional change. When the airflow passes through the inner side of the outer platform 212, the local flow area changes, and the flow velocity and direction change accordingly. Utilizing centrifugal force and inertial difference, larger sand particles are thrown towards the inner wall of the baffle plate 2 and fall into the adjacent diversion air passage 231. The sand accumulation trough and anti-adhesion coating make it difficult for the separated sand particles to be re-flyed, avoiding secondary pollution. This multi-level undulating structure also allows the wind load to be distributed and transferred along the undulating surface of the inner platform 211 and the outer platform 212 when the baffle plate 2 is subjected to wind pressure, reducing local bending moment and improving the structural stiffness and wind vibration resistance of the baffle plate 2. Under rain conditions, rainwater flows into the diversion channel 241 along the outer surface of the folded plate 2 and the concave arc plate 21. When the amount of rainwater is small, the diversion channel 241 itself can serve as a drainage channel for downward discharge; when the amount of rainwater increases to the point that the water level in the diversion channel 241 exceeds the height of the drainage structure 25, the water overflows from the drainage structure 25 set on the interval diversion channel 241 and enters the adjacent diversion air duct 231. The water overflowing into the diversion air duct 231 washes downward along the inner wall of the diversion air duct 231, carrying out sand particles, salt spray crystals and other impurities that are attached to and deposited on the inner wall of the diversion air duct 231 during sandstorm conditions, thereby achieving automatic cleaning of the diversion air duct 231.

[0063] In summary, this externally protected folding plate-type meter box, by setting the lower half of the concave arc plate 21 as a diversion structure, firstly, forms a diversion air duct 231 and a diversion water duct 241 on the inner and outer sides of the folding plate 2, respectively. On the one hand, the diversion air duct can be used to enhance the local airflow velocity and prevent sand accumulation; on the other hand, its multi-level undulating structure can be used to enhance the structural strength of the folding plate 2. Secondly, when the rainfall is heavy, the water in the diversion water duct 241 overflows from the drainage structure 25 to clean the adjacent diversion air duct 231.

[0064] Example 3: After the improvement in the above embodiment 2, the diversion channel 241 with the interception structure 26 is prone to debris accumulation.

[0065] This embodiment provides a detachable meter box with an external protective folding plate, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0066] Please see Figures 9-11 The intercepting structure 26 includes an intercepting plate 261. A rotating connection 262 is provided between the intercepting plate 261 and the baffle plate 2. The rotating connection 262 is located below the inner platform 211. An elastic torsion element is provided inside the intercepting structure 26. The elastic torsion element provides elastic potential energy to the intercepting plate 261 to rotate towards the bottom of the diversion channel 241. The interceptor plate 261 includes an extension 263 disposed in the diversion duct 231. When the interceptor plate 261 is attached to the bottom of the diversion duct 241, one side of the extension 263 is attached to the inner side of the outer platform 212.

[0067] Furthermore, the elastic torsion element includes a torsion spring disposed in the rotating connection 262, or a magnetic attraction assembly disposed on the cut-off plate 261 and the diversion channel 241.

[0068] It should be noted that when the baffle plate 261 is attached to the bottom of the diversion channel 241 under the action of the elastic torsion element, the seal between the plate and the bottom of the diversion channel 241 is not tight, and a small flow of water will seep back into the diversion channel 231 from the gap. This situation will not only not have a negative impact on the diversion channel 231, but will also play a role in cleaning the lower half of the diversion channel 231.

[0069] Furthermore, in order to address the issue that the interceptor plate 261 may tilt excessively downwards when opening to discharge slag under gravity, causing the extension 263 to collide with the wall of the diversion duct 231 or the inner side of the outer platform 212 and resulting in structural damage, a limiting block is installed on the folding plate 2 near the rotating connection 262 to limit the maximum opening angle of the interceptor plate 261 relative to the bottom of the diversion duct 241. At the same time, a buffer pad is installed at the point where the extension 263 may come into contact with the inner wall of the diversion duct 231, thus achieving the effect of controllable opening stroke of the interceptor plate 261 and avoiding rigid collision damage during slag discharge.

[0070] Furthermore, in order to solve the problem that the accumulated material is not completely discharged after the interceptor plate 261 is opened and some mud and sand still remain at the bottom of the diversion channel 241, a scraper extending along the width of the diversion channel 241 is provided on the interceptor plate 261, and a guide groove cooperating with the scraper is provided at the bottom of the diversion channel 241. When the interceptor plate 261 is opened downward around the rotating connection 262, the scraper slides along the bottom of the diversion channel 241 and pushes the remaining accumulated material into the drainage channel, thereby improving the self-cleaning ability of the diversion channel 241 and reducing the frequency of manual cleaning.

[0071] Furthermore, in order to solve the problem that the magnetic force decreases sharply as the opening distance of the throttle plate 261 increases when using the magnetic attraction component as an elastic torsion element, resulting in insufficient reset force in the later stage of the throttle plate 261 closure, the magnetic attraction component is set to be arranged in a gradually changing magnetic path along the opening direction of the throttle plate 261, and multiple sets of magnetic blocks are set at corresponding positions of the throttle plate 261 and the diversion channel 241, so that the change of magnetic attraction force during the opening of the throttle plate 261 is gradual, thereby achieving the effect of providing sufficient reset torque when the throttle plate 261 is closed and ensuring reliable sealing of the throttle plate 261 in the closed state.

[0072] Furthermore, in order to solve the problem of wear and jamming caused by long-term impact of sand particles in the diversion channel 241 and water flow erosion at the rotating connection 262 on the interceptor plate 261, a wear-resistant coating is applied to the surface of the interceptor plate 261 and the surface of the extension 263, or a wear-resistant nylon material is used on the edge of the interceptor plate 261, and a sealing sleeve is installed in the rotating connection 262 to prevent sand particles from entering the interior of the rotating connection 262, thereby improving the service life and rotational flexibility of the interceptor structure 26.

[0073] Furthermore, in order to solve the problem that it is difficult for operators to manually pull open the interceptor plate 261 due to the closed folding plate 2, a hook is set at the bottom of the interceptor plate 261, and a pull rod that can be detachably connected to the hook is set on the folding plate 2. The pull rod extends to the operating hole on the outside of the folding plate 2, and an openable and closable waterproof cover is set on the operating hole, so that operators can pull the interceptor plate 261 from the outside without disassembling the folding plate 2, thus achieving the effect of conveniently and manually cleaning the accumulated materials in the diversion channel 241.

[0074] Furthermore, to address the issue of the obstruction plate 261 failing to open normally under gravity due to the caking of accumulated material within the diversion channel 241 caused by long-term immersion in water, several seepage holes communicating with the diversion channel 241 are made on the obstruction plate 261. This allows water accumulated in the diversion channel 241 to slowly seep into the diversion duct 231 through the obstruction plate 261, reducing the degree of caking and achieving the effects of maintaining the fluidity of the accumulated material and improving the reliability of the automatic opening of the obstruction plate 261. The diameter of the seepage holes is smaller than the diameter of the filter screen at the inlet of the drainage structure 25, or the anti-adhesion coating on the surface of the obstruction plate 261 does not cover the seepage holes to prevent large sand particles carried by the seepage water from entering the diversion duct 231.

[0075] Based on Embodiment 2, the external protective baffle of the split meter box in this embodiment optimizes the current-blocking structure 26 into a rotatable and openable current-blocking plate 261 structure. Its working principle is as follows: In the normally closed state: the interceptor plate 261 is mounted below the inner platform 211 on the baffle plate 2 via the rotating connection 262. The elastic torsion element torsion spring or magnetic attraction assembly applies elastic potential energy to the interceptor plate 261, causing it to rotate towards the bottom of the diversion channel 241, thus sealing the diversion channel 241. At this time, one side of the extension 263 located in the diversion duct 231 is attached to the inner side of the outer platform 212, maintaining the isolation between the diversion channel 241 and the diversion duct 231 and preventing lateral crossflow.

[0076] Automatic discharge of accumulated material: When accumulated material continuously builds up in the diversion channel 241 equipped with the intercepting plate 261, and the sum of the weight of the accumulated material and the internal water pressure exceeds the elastic potential energy of the elastic torsional element, the intercepting plate 261 flips downward around the rotating connection 262 and opens, allowing the accumulated material to be discharged downward along the bottom of the diversion channel 241. During the opening process, the scraper strips on the intercepting plate 261 slide along the guide groove at the bottom of the diversion channel 241, pushing the remaining silt and sand at the bottom towards the drainage channel, thus achieving automatic sludge removal.

[0077] Wind, sandstorms, and water flow assist in opening: The extension 263 of the interceptor plate 261 is exposed within the diversion duct 231. When airflow passes through the diversion duct 231, the wind force acts on the extension 263, creating an auxiliary opening torque. When sandstorms accumulate within the diversion duct 231 and adhere to the extension 263, the weight of the accumulated sandstorms also provides an auxiliary opening torque. When the water flow discharged from the drainage structure 25 impacts the extension 263, the impact force of the water flow also assists the interceptor plate 261 in opening the waterway. The superposition of these three external forces and the gravity of the accumulated material makes the interceptor plate 261 easier to open when there is a large amount of accumulated material or when external water flow is applied, ensuring that the diversion duct 241 is not blocked.

[0078] Manual cleaning mode: When manual intervention is required, the operator opens the waterproof cover on the operating hole on the outside of the baffle plate 2, and pulls the hook at the bottom of the interceptor plate 261 via the pull rod, causing the interceptor plate 261 to open downwards around the rotating connection 262, thereby manually discharging the accumulated material in the diversion channel 241. After releasing the pull rod, the elastic torsion element drives the interceptor plate 261 to return to its original position and adhere to the bottom of the diversion channel 241.

[0079] Reset and self-cleaning cycle: After the accumulated material is discharged, the gravitational load on the interceptor plate 261 decreases, and the elastic potential energy of the elastic torsion element causes the interceptor plate 261 to re-adhere to the bottom of the diversion channel 241, and the diversion channel 241 returns to the interception state. Through the automatic opening and reset cycle of the interceptor plate 261, the problem of debris accumulation in the diversion channel 241 is effectively solved. At the same time, with the assistance of wind, sand and dust in the diversion duct 231 and the water flow discharged from the drainage structure 25, the interception structure 26 achieves continuous self-cleaning.

[0080] In summary, this externally protected folding plate-type meter box, by setting up the intercepting plate 261, firstly, when there is too much accumulated material in the diversion channel 241 where the intercepting plate 261 is set, the elastic potential energy of the elastic torsion element is overcome under the action of gravity, causing the intercepting plate 261 to open downward, thereby discharging the accumulated material; secondly, by setting a hook at the bottom of the intercepting plate 261, the intercepting plate 261 can be manually opened by pulling the lever; finally, part of the intercepting plate 261 is exposed in the diversion air duct 231, and the wind force, accumulated sand, or water flowing down from the drainage mechanism can be used to assist the intercepting plate 261 in opening the water duct.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable meter box with an external protective folding plate, comprising a box body (1), characterized in that: A folding plate (2) is provided on the outside of the box (1). The box (1) is fixedly installed on the inside of the folding plate (2). At least part of the folding plate (2) is located above the top of the box (1). At least part of the folding plate (2) is located behind the back of the box (1). The gap between the folding plate (2) and the box (1) forms a bent air passage (23). The folding plate (2) has a concave arc plate (21) at the center of the bend. The concave arc plate (21) is recessed towards the inside of the folding plate (2). The inner side of the concave arc plate (21) forms an arc-shaped flow guide surface at the bend. The outer side of the concave arc plate (21) forms a drainage channel (24) on the mounting surface of the folding plate (2).

2. The detachable meter box with an external protective folding plate according to claim 1, characterized in that, At least a portion of the concave arc plate (21) at the rear of the box body (1) is configured as a diversion structure, and the portion of the folding plate (2) at the rear of the box body (1) other than the concave arc plate (21) is the edge (20) of the folding plate. The concave arc plate (21) in the diversion structure has an inner platform (211) and an outer platform (212) alternately arranged in the horizontal direction. The inner platform (211) protrudes inward relative to the edge (20) of the folded plate, and the outer platform (212) protrudes outward relative to the inner platform (211). The outer platform (212) protrudes outward to a position flush with the edge (20) of the folded plate. The inner platform (211) and the outer platform (212) are connected by an inclined slope or vertical steps. A diversion channel (241) is formed on the outer side of the inner platform (211), and a diversion air duct (231) is formed on the inner side of the outer platform (212). A drainage structure (25) is provided on each of the multiple branch waterways (241) at intervals, and the drainage structure (25) is located on both sides of the branch waterway (241) facing the branch airway (231).

3. A detachable meter box with an external protective folding plate according to claim 1, characterized in that, The box body (1) is provided with side plates (3) on both sides. The side plates (3) are detachably fixed to the inside of the folding plate (2). The side plates (3) are provided with wire holes (31).

4. A detachable meter box with an external protective folding plate according to claim 1, characterized in that, The folding plate (2) is fixed on the surface of the mounting base (91), which is a wall.

5. A detachable meter box with an external protective folding plate according to claim 1, characterized in that, The folding plate (2) protrudes outward relative to the box body (1) on both the front and rear sides in the thickness direction, the folding plate (2) protrudes outward relative to the box body (1) on both the left and right sides in the length direction, and the folding plate (2) protrudes outward relative to the box body (1) on both the upper and lower sides in the height direction. In other words, the folding plate (2) covers the box body (1) in the thickness direction, height direction and length direction.

6. A detachable meter box with an external protective folding plate according to claim 1, characterized in that, The back of the box (1) has heat dissipation holes, and a screen is provided on the outside of the heat dissipation holes.

7. A detachable meter box with an external protective folding plate according to claim 2, characterized in that, The inlet of the drainage structure (25) protrudes into the diversion channel (241).

8. A detachable meter box with an external protective folding plate according to claim 2, characterized in that, A flow interception structure (26) is provided on each branch waterway (241) provided with a drainage structure (25), the flow interception structure (26) blocking the branch waterway (241).

9. A detachable meter box with an external protective folding plate according to claim 8, characterized in that, The intercepting structure (26) is a movable intercepting plate structure. The intercepting structure (26) includes an intercepting plate (261). A rotating connection part (262) is provided between the intercepting plate (261) and the baffle plate (2). The rotating connection part (262) is located below the inner platform (211). An elastic torsion element is provided inside the intercepting structure (26). The elastic torsion element provides elastic potential energy to the intercepting plate (261) to rotate towards the bottom of the diversion channel (241). The interceptor plate (261) includes an extension (263) disposed in the diversion duct (231). When the interceptor plate (261) is attached to the bottom of the diversion duct (241), one side of the extension (263) is attached to the inner side of the outer platform (212).

10. A detachable meter box with an external protective folding plate according to claim 8, characterized in that, The interception structure (26) is an integrated base plate structure, which is an integrated base plate with the inner platform (211).

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