Visual window protection type electric energy metering box

Abstract

This application provides a protective electricity metering box with a viewing window, belonging to the technical field of electricity metering boxes. It includes a viewing window device comprising an inner frame, an outer frame, an inner partition, an outer protective plate, and a glass plate. The inner and outer frames are respectively located on the inner and outer sides of the box door opening, and both have track portions on their left and right sides of the opening. The glass plate is positioned between the inner and outer frames. Both the inner partition and the outer protective plate have slider portions adapted to the track portions on their sides, and both slider portions have a first rack portion on their outer sides. A rotating shaft is provided on the box door, and the rotating shaft has an external gear and an internal gear. During vertical movement, the inner partition and the outer protective plate have a closed position with the glass plate folded and an open position with the glass plate exposed. This invention features an outer protective plate and an inner partition that can be operated and moved synchronously outside the box, providing comprehensive protection for the glass plate and reducing the possibility of scratches, wear, and dust accumulation on the glass plate.

Description

Technical Field

[0001] This invention relates to the field of electricity metering box technology, and specifically to an electricity metering box with a protective viewing window. Background Technology

[0002] The electricity metering box is a core terminal device in the power system for realizing electricity trade settlement and electricity consumption data collection. The viewing window, as a key component of the metering box, is an important channel for operation and maintenance personnel to read the electricity meter readings without opening the box.

[0003] Most existing electricity metering boxes use fixed glass viewing windows. Over long-term use, the outer wall is easily scratched and worn by wind, sand and hard objects, and the inner wall is prone to dust accumulation. Moreover, it cannot be cleaned without opening the box. Maintenance requires breaking the legal metering seal and going through the power outage approval process, resulting in high operation and maintenance costs and low efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a protective power metering box with a viewing window.

[0005] The technical solution adopted by this invention is as follows: This application provides a protective electricity metering box with a viewing window, including a box body with a door. A viewing window device is provided on the box body. The viewing window device includes an inner frame, an outer frame, an inner partition, an outer protective plate, and a glass plate. The door has an opening. The inner frame and outer frame are respectively located on the inner and outer sides of the opening, and both are provided with track portions on the left and right sides of the opening. The glass plate is located between the inner frame and the outer frame. Sliding blocks adapted to the track portions are provided on both sides of the inner partition and the outer protective plate. The outer sides of both sliding blocks are along... The sliding direction is provided with a first rack portion, and the door is provided with a rotating shaft. One end of the rotating shaft extends out of the box body and is provided with an external gear that meshes with the first rack portion of the outer protective plate. The other end extends into the box body and is provided with an internal gear that meshes with the first rack portion of the inner partition. During vertical movement, the inner partition and the outer protective plate have a closed position with the folded glass panel and an open position with the exposed glass panel. The door is provided with a first limiting structure corresponding to the open position of the inner partition and / or the outer protective plate, and a second limiting structure is provided on it corresponding to the closed position of the inner partition and / or the outer protective plate.

[0006] In some embodiments, the first limiting structure includes a limiting block disposed on the inner wall of the door, and when the inner partition is in the open position, its lower end face abuts against the limiting block.

[0007] In some embodiments, a housing is provided on the door outside the external gear. The second limiting structure includes a positioning piece, a moving plate, and positioning springs. The moving plate is slidably disposed toward the first rack portion. The positioning piece is disposed on the side of the moving plate near the first rack portion, and a positioning end adapted to it is provided at the end of the moving plate near the first rack portion. There are two positioning springs, which are disposed at intervals on the side of the moving plate away from the first rack portion and abut against the inner wall of the housing on that side. A locking opening is formed between the moving plate, the housing, and the two positioning springs, and a locking element is disposed in the locking opening.

[0008] In some embodiments, an inner cavity is provided between the inner side of the glass plate and the inner partition, and an outer cavity is provided between the outer side of the glass plate and the outer protective plate.

[0009] In some embodiments, a cleaning component is provided on the end face of the inner partition facing the glass plate. The cleaning component includes a fixing frame and a scraper. The fixing frame is disposed on the upper part of the inner partition and near the top of the glass plate, and has a through hole. The scraper includes a mounting part embedded in the fixing frame and a scraper part extending toward the glass plate.

[0010] In some embodiments, a collection chamber is provided at the bottom of the inner opening of the inner frame, and an inlet is provided at the upper end of the collection chamber at an angle. The side of the inlet near the glass plate slopes downward. The collection chamber is disposed against the glass plate, and its side wall near the glass plate is made of transparent material.

[0011] In some embodiments, a key lock cylinder is provided on the door, and a lock plate is connected to one end of the key lock cylinder located inside the box. The lock plate includes a first end and a second end arranged at an angle. The first end is used to lock with the box body. A transmission gear is provided at one end of the rotating shaft located inside the box body. A lock rod is vertically slidably arranged on the inner wall of the box body. The lock rod includes a second rack portion, a lock plate portion, and a clearance groove portion. The second rack portion is arranged on the side of the lock rod close to the transmission gear and meshes with it. The lock plate portion and the clearance groove portion are arranged along the length direction of the lock rod. When the outer protective plate and the inner partition are in the closed position, the second end is aligned with the clearance groove, allowing the locking plate to rotate freely. When the outer protective plate and the inner partition are in the open position, the second end is aligned with the locking plate, preventing the locking plate from rotating.

[0012] In some embodiments, the inner wall of the door is provided with two track plates spaced apart, and the track plates are provided with sliding grooves. The two sides of the locking rod are provided with rollers that slide and cooperate with the sliding grooves. When the outer guard plate and the inner partition are in the closed position, the second end is aligned with the clearance groove, so that the roller abuts against the upper end of the sliding groove. When the outer guard plate and the inner partition are in the open position, the second end is aligned with the locking plate, so that the roller abuts against the lower end of the sliding groove.

[0013] In some embodiments, a base box is provided on the inner wall of the door on one side of the locking rod. A micro switch and a micro power supply are provided in the base box. A warning light is provided on the outer wall of the door corresponding to the base box. The micro switch includes a first trigger spring. A trigger protrusion is provided on the side of the locking rod near the base box. The free end of the first trigger spring is located on the moving path of the trigger protrusion. When the outer protective plate and the inner partition are in the closed position, the trigger protrusion presses against the first trigger spring, and the warning light is turned off. When the outer protective plate and the inner partition are not in the closed position, the warning light emits a warning.

[0014] In some embodiments, the micro switch further includes a housing, a moving contact, a first normally open contact, a first normally closed contact, a second normally open contact, a second normally closed contact, and a second trigger spring. The moving contact includes a fixed portion and a first movable portion and a second movable portion arranged in parallel. The fixed portion is electrically connected to a micro power supply. The first normally open contact and the first normally closed contact are disposed on both sides of the first movable portion. The second normally open contact and the second normally closed contact are disposed on both sides of the second movable portion. The first normally closed contact and the second normally closed contact are electrically connected to the micro power supply. The first trigger spring and the second trigger spring are respectively located on both sides of the housing. A first trigger rod is disposed between the first trigger spring and the first movable portion. A second trigger rod is disposed between the second trigger spring and the second movable portion. The free end of the second trigger spring is located on the rotation path of the first end. Under normal conditions, the first movable part is electrically connected to the first normally closed contact, and the second movable part is electrically connected to the second normally open contact. When the outer protective plate and the inner partition are in the closed position, the trigger protrusion presses against the first trigger spring, the first movable part is electrically connected to the first normally open contact, and the warning light is disconnected from the miniature power supply. When the outer protective plate and the inner partition are not in the closed position, the first movable part is electrically connected to the first normally closed contact, so that the warning light is connected to the miniature power supply and emits a warning. When the key lock cylinder is in the locked state, the second movable part is electrically connected to the second normally open contact, and the warning light is disconnected from the micro power supply. When the key lock cylinder is in the unlocked state, the first end presses against the second trigger spring, and the second movable part is electrically connected to the second normally closed contact, so that the warning light is connected to the micro power supply and emits a warning.

[0015] The beneficial effects of the present invention are as follows: The present invention is equipped with an outer protective plate and an inner partition that can be operated and moved synchronously outside the box to provide comprehensive protection for the middle glass plate, reducing the possibility of the glass plate being scratched, worn and dusty, and can avoid opening the box to clean the glass plate as much as possible, while avoiding cumbersome procedures such as power outage approval and breaking the legal measurement seal. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present 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 some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0017] Figure 1 This is a schematic diagram of a window-protected power metering box according to the present invention; Figure 2 This is a schematic diagram of the cabinet door in this invention. Figure 1 ; Figure 3 This is a schematic diagram of the cabinet door in this invention. Figure 2 ; Figure 4 This is a schematic diagram of the cabinet door in this invention. Figure 3 ; Figure 5 This is a partial schematic diagram of the second limiting structure in this invention; Figure 6 This is a partial schematic diagram of the viewing window device and the key lock cylinder in this invention. Figure 1 ; Figure 7 This is a partial schematic diagram of the viewing window device and the key lock cylinder in this invention. Figure 1 ; Figure 8 This is a partial schematic diagram of the micro switch in this invention; Figure 9 A partial cross-sectional view of the viewing window device in this invention. Figure 1 ; Figure 10 A partial cross-sectional view of the viewing window device in this invention. Figure 2 ; Figure 11 A partial cross-sectional view of the viewing window device in this invention. Figure 3 ; In the diagram: 1-Box body, 100-Box door, 101-Outer shell, 2-Viewing window device, 20-Inner frame, 21-Outer frame, 22-Inner partition, 220-Slider section, 2200-First rack section, 23-Outer protective plate, 24-Glass plate, 25-Rotating shaft, 26-External gear, 27-Internal gear, 3-First limiting structure, 30-Limiting block, 4-Second limiting structure, 40-Positioning piece, 400-Positioning end, 41-Moving plate, 42-Positioning spring, 43-Lock, 44-Lock, 5-Inner cavity, 6-Outer cavity, 7-Cleaning component, 70-Fixing frame, 700-Through hole, 71-Scraper, 710-Mounting part, 711-Scraper section, 72-Collection compartment, 720-Entrance, 8-Key lock cylinder 80-Locking plate, 801-First end, 802-Second end, 81-Transmission gear, 82-Locking rod, 820-Second rack part, 821-Allowing groove part, 822-Roller, 823-Trigger protrusion, 824-Locking plate part, 83-Rail plate, 830-Slide groove, 9-Base box, 90-Micro switch, 900-First trigger spring, 901-Housing, 902-Moving contact, 903-First normally open contact, 904-First normally closed contact, 905-Second normally open contact, 906-Second normally closed contact, 907-Second trigger spring, 908-First movable part, 909-Second movable part, 910-First trigger rod, 911-Second trigger rod, 91-Warning light. Detailed Implementation

[0018] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "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. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0020] It should be noted that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0021] It should be noted that the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0022] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the above terms in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0023] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0025] The existing fixed viewing window of the electricity metering box has problems such as easy wear, scratches and dust accumulation on the inner and outer walls of the glass plate. Moreover, the inner wall of the glass plate cannot be cleaned without opening the box, and maintenance requires removing the seal and going through power outage approval, which is extremely inefficient.

[0026] like Figures 1 to 11As shown, this application provides a protective power metering box with a viewing window, including a box body 1 with a box door 100. A viewing window device 2 is provided on the box body 1. The viewing window device 2 includes an inner frame 20, an outer frame 21, an inner partition 22, an outer protective plate 23, and a glass plate 24. The box door 100 is provided with an opening. The inner frame 20 and the outer frame 21 are respectively provided on the inner and outer sides of the opening, and both are provided with track portions on the left and right sides of the opening. The glass plate 24 is provided between the inner frame 20 and the outer frame 21. Specifically, the inner openings of the inner frame 20 and the outer frame 21 are smaller than the opening of the box door 100 to form a cavity for installing the glass plate 24.

[0027] Both sides of the inner partition 22 and the outer protective plate 23 are provided with sliders 220 adapted to the track. The outer sides of both sliders 220 are provided with first racks 2200 along their sliding direction. The door 100 is provided with a rotating shaft 25. One end of the rotating shaft 25 extends out of the box body 1 and is provided with an external gear 26 that meshes with the first rack 2200 of the outer protective plate 23. The other end extends into the box body 1 and is provided with an internal gear 27 that meshes with the first rack 2200 of the inner partition 22. During vertical movement, the inner partition 22 and the outer protective plate 23 have a closed position with the folded glass plate 24 and an open position with the exposed glass plate 24. Preferably, the outer protective plate 23 is provided with a pusher to facilitate pushing the outer protective plate 23 and simultaneously driving the inner partition 22 to move.

[0028] For example, the external gear 26 and the internal gear 27 are standard cylindrical spur gears with the same module, number of teeth, and pitch circle diameter. They achieve 1:1 coaxial rigid synchronous rotation through the rotating shaft 25 that passes through the door 100. The joint between the rotating shaft 25 and the door 100 is provided with a double fluororubber skeleton oil seal, and the protection level can reach IP65, completely preventing rainwater and dust from entering the interior of the box through the joint of the rotating shaft. The external gear 26 and the first rack portion 2200 of the outer guard plate 23 and the internal gear 27 and the first rack portion 2200 of the inner partition plate 22 are both designed with zero backlash, ensuring that the inner partition plate 22 and the outer guard plate 23 slide synchronously with absolute rigidity, without misalignment, skipping teeth, or jamming.

[0029] This simple, compact, and efficient mechanical structure enables the outer protective plate 23 and the inner partition 22 to move synchronously, effectively protecting the glass plate 24 and significantly reducing the cleaning cycle.

[0030] Furthermore, the door 100 is provided with a first limiting structure 3 corresponding to the open position of the inner partition 22 and / or the outer protective plate 23, and a second limiting structure 4 corresponding to the closed position of the inner partition 22 and / or the outer protective plate 23. The limiting structures can be simple, such as blocks, pins, or buckles, to ensure that the inner partition 22 and the outer protective plate 23 are positioned at the designated locations.

[0031] In some embodiments, the first limiting structure 3 includes a limiting block disposed on the inner wall of the door 100. When the inner partition 22 is in the open position, its lower end face abuts against the limiting block, precisely limiting the maximum downward travel of the inner partition 22 and the outer protective plate 23. At the same time, only the limiting block needs to be disposed on the inner wall of the box body 1, making the appearance of the box body 1 more aesthetically pleasing.

[0032] In some embodiments, a housing 101 is provided on the door 100 outside the external gear 26. The second limiting structure 4 includes a positioning plate 40, a moving plate 41, and a positioning spring 42. The moving plate 41 is slidably disposed toward the first rack portion 2200. The positioning plate 40 is disposed on the side of the moving plate 41 near the first rack portion 2200, and a positioning end 400 adapted to it is provided at one end of the moving plate 41 near the first rack portion 2200. The positioning end 400 is an arc-shaped tip adapted to the tooth groove. There are two positioning springs 42, which are disposed at intervals on the side of the moving plate 41 away from the first rack portion 2200 and abut against the inner wall of the housing 101 on that side. Both of them are provided with grooves for limiting the positioning springs 42, thereby improving the stability of the positioning springs 42 when they extend and retract.

[0033] Under normal conditions, the two positioning springs 42 simultaneously push the moving plate 41 toward the first rack portion 2200, causing the positioning end 400 of the positioning piece 40 to engage in the tooth groove of the first rack portion 2200, thereby achieving multi-position locking of the outer guard plate 23. It can also provide a certain damping effect for the movement of the outer guard plate 23, thus preventing the outer guard plate 23 from slipping off instantly.

[0034] Furthermore, a locking slot 43 is formed between the movable plate 41, the outer casing 101, and the two positioning springs 42. A locking member 44 is provided within the locking slot 43, with one end of the locking member 44 abutting against the inside of the locking slot 43. At this time, the positioning end 400 rigidly locks the tooth groove, preventing the outer protective plate 23 from moving. When it is necessary to move the outer protective plate 23, the locking member 44 can simply be pulled out. The other end of the locking member 44 is provided with a plug-in gripping part, and it can be provided with a connecting hole for connecting to the door 1 via a rope.

[0035] In addition, depending on actual needs, the lock 44 and the lock port 43 can also be equipped with a mechanical lock structure, requiring unlocking to remove the lock 44.

[0036] It is understandable that the outer casing 101 can completely enclose the outer gear 26 and the second limiting structure 4, preventing dust and rainwater from entering the transmission meshing area, reducing the wear of the gears and racks, and preventing unauthorized personnel from prying open the transmission structure, thus further strengthening the anti-theft capability.

[0037] Furthermore, the top of the outer frame 21 is provided with a raised edge, which limits the maximum upward movement of the inner partition 22 and the outer protective plate 23, and also prevents rainwater from entering the track section.

[0038] In some embodiments, the end face of the glass plate 24 facing the inside of the housing 1 is coated with a nano anti-fog and hydrophobic coating. The nano anti-fog and hydrophobic coating is a fluorine-modified nano silica coating with a visible light transmittance of ≥95% and a water contact angle of ≥110°, which allows the condensation on the inner wall of the glass plate 24 to quickly gather into water droplets and slide off without forming a water film that obstructs the view.

[0039] In some embodiments, an inner cavity 5 is provided between the inner side of the glass plate 24 and the inner partition 22, and an outer cavity 6 is provided between the outer side of the glass plate 24 and the outer protective plate 23. This provides clearance space for the sliding of the inner partition 22 and the outer protective plate 23, while preventing the inner partition 22 and the outer protective plate 23 from directly scratching the glass plate 24 during the sliding process, thus preventing the glass plate 24 from being worn or scratched and extending the service life of the glass plate.

[0040] In some embodiments, a cleaning component 7 is provided on the end face of the inner partition 22 facing the glass plate 24. The cleaning component 7 includes a fixing frame 70 and a scraper 71. The fixing frame 70 is disposed on the upper part of the inner partition 22 and near the top of the glass plate 24, and has a through hole 700. The scraper 71 includes a mounting part 710 embedded in the fixing frame 70 and a scraper part 711 extending toward the glass plate 24. With this configuration, when the inner partition 22 slides synchronously with the outer protective plate 23, the scraper part 711 is in close contact with the inner wall of the glass plate 24 throughout the entire process, achieving cleaning without dead angles. There is no need to open the box or remove the seal. Daily inspections can complete the cleaning, completely solving the problem that the inner wall of a fixed glass plate cannot be cleaned without opening the box.

[0041] In some embodiments, a collection chamber 72 is provided at the bottom of the inner opening of the inner frame 20, and an inlet 720 is provided at the upper end of the collection chamber 72 at an angle. The inlet 720 is inclined downward on the side near the glass plate 24. Specifically, the inclination angle of the inlet 720 is 30°-60°, which can ensure that the dust, condensation and other substances scraped off by the scraper 71 flow completely into the collection chamber 72 along the glass plate 24 and will not spill.

[0042] The collection chamber 72 is disposed against the glass plate 24, and at least its sidewall closest to the glass plate 24 is made of a transparent material. For example, the transparent sidewall is made of high-transmittance PC material or the same material as the glass plate, so that maintenance personnel can view the accumulation of dirt in the collection chamber 72 through the viewing window without opening the box to determine whether cleaning is required.

[0043] In some embodiments, a key lock cylinder 8 is provided on the door 100, and a lock plate 80 is connected to one end of the key lock cylinder 8 located inside the box body 1. The lock plate 80 includes a first end 801 and a second end 802 arranged at an angle. The first end 801 is used to lock with the box body 1. A transmission gear 81 is provided at one end of the rotating shaft 25 located inside the box body 1. A locking rod 82 is vertically slidably provided on the inner wall of the box body 1. The locking rod 82 includes a second rack portion 820, a lock plate portion 824, and a clearance groove portion 821. The second rack portion 820 is disposed on the side of the locking rod 82 near the transmission gear 81 and meshes with it. The locking plate portion 824 and the clearance groove portion 821 are disposed along the length direction of the locking rod 82. When the outer protective plate 23 and the inner partition 22 are in the closed position, the second end 802 is aligned with the clearance groove portion 821, so that the locking plate 80 can rotate freely. When the outer protective plate 23 and the inner partition 22 are in the open position, the second end 802 is aligned with the locking plate portion 824, so that the locking plate 80 cannot rotate.

[0044] Specifically, when the rotating shaft 25 rotates, the locking rod 82 can be precisely vertically slid through the transmission gear 81; the clearance groove 821 on the locking rod 82 is a through groove with a width greater than the width of the second end 802 of the locking plate 80, and the locking plate is a solid rigid block. When the second end 802 is aligned with the locking plate, the rotation path of the locking plate 80 is completely blocked and it cannot rotate.

[0045] This setup achieves a forced interlock between the inspection operation and the opening and closing of the cabinet door, eliminating the risk of electric shock and electricity theft caused by accidental or illegal opening of the door during the inspection process.

[0046] In some embodiments, the inner wall of the door 100 is provided with two track plates 83 spaced apart. Each track plate 83 has a sliding groove 830. Rollers 822, corresponding to the track plates 83, are provided on both sides of the locking rod 82 to slide and engage with the sliding grooves 830. When the outer protective plate 23 and the inner partition 22 are in the closed position, the second end 802 aligns with the clearance groove 821, causing the rollers 822 to abut against the upper end of the sliding groove 830. When the outer protective plate 23 and the inner partition 22 are in the open position, the second end 802 aligns with the locking plate 824, causing the rollers 822 to abut against the lower end of the sliding groove 830. This configuration significantly reduces the sliding resistance of the locking rod through the cooperation of the rollers and the sliding grooves. The hard limit design at the upper and lower ends precisely restricts the sliding stroke of the locking rod, ensuring the alignment accuracy of the clearance groove, the locking plate, and the second end of the locking plate, thus preventing interlocking failure due to overtravel.

[0047] In some embodiments, a base box 9 is provided on the inner wall of the door 100 on one side of the locking rod 82. A micro switch 90 and a micro power supply are provided in the base box 9. A warning light 91 is provided on the outer wall of the door 100 corresponding to the base box 9. The micro switch 90 includes a first trigger spring 900. A trigger protrusion 823 is provided on the side of the locking rod 82 near the base box 9. The free end of the first trigger spring 900 is located on the moving path of the trigger protrusion 823. When the outer protective plate 23 and the inner partition 22 are in the closed position, the trigger protrusion 823 presses against the first trigger spring 900, and the warning light 91 is extinguished. When the outer protective plate 23 and the inner partition 22 are not in the closed position, the warning light 91 emits a warning.

[0048] This setup enables automatic alarms when the viewport is not reset, reminding maintenance personnel to reset the viewport promptly after inspections to prevent protection failure and electricity theft risks caused by the viewport being open for extended periods. Furthermore, the purely mechanical triggering eliminates the need for complex sensors and controllers, ensuring high reliability and making it suitable for unattended outdoor scenarios.

[0049] In addition, by installing the warning light 91 on the outer wall of the box door 100, only a through hole needs to be made on the box door for the wire to pass through, thus ensuring the integrity of the box door.

[0050] Furthermore, the micro switch 90 also includes a housing 901, a moving contact 902, a first normally open contact 903, a first normally closed contact 904, a second normally open contact 905, a second normally closed contact 906, and a second trigger spring 907. The moving contact 902 includes a fixed portion and a first movable portion 908 and a second movable portion 909 arranged side by side. The fixed portion is electrically connected to a micro power supply. The first normally open contact 903 and the first normally closed contact 904 are disposed on both sides of the first movable portion 908. The second normally open contact 905 and the second normally closed contact 906 are disposed on both sides of the first movable portion 907. Closed contact 906 is disposed on both sides of the second movable part 909. The first normally closed contact 904 is electrically connected to the second normally closed contact 906 and the miniature power supply. The first trigger spring 900 and the second trigger spring 907 are respectively located on both sides of the housing 101. A first trigger rod 910 is disposed between the first trigger spring 900 and the first movable part 908. A second trigger rod 911 is disposed between the second trigger spring 907 and the second movable part 909. The free end of the second trigger spring 907 is located on the rotation path of the first end 801.

[0051] Under normal conditions, the first movable part 908 is electrically connected to the first normally closed contact 904, and the second movable part 909 is electrically connected to the second normally open contact 905. When the outer protective plate 23 and the inner partition 22 are in the closed position, the trigger protrusion 823 presses against the first trigger spring 900, the first movable part 908 is electrically connected to the first normally open contact 903, and the warning light 91 is disconnected from the miniature power supply. When the outer protective plate 23 and the inner partition 22 are not in the closed position, the first movable part 908 and the first normally open contact 905 are electrically connected. When the key lock cylinder 8 is in the locked state, the second movable part 909 is electrically connected to the second normally open contact 905, and the warning light 91 is disconnected from the micro power supply. When the key lock cylinder 8 is in the unlocked state, the first end 801 presses against the second trigger spring 907, and the second movable part 909 is electrically connected to the second normally closed contact 906, so that the warning light 91 is connected to the micro power supply and emits a warning.

[0052] This configuration, through a double-pole microswitch, achieves dual alarms for two abnormal states: the viewing window not reset and the door open. This completely fills the blind spot in existing technologies where the viewing window status is not monitored, further strengthening the device's anti-theft and security capabilities. Simultaneously, the parallel triggering logic ensures that any abnormal state will trigger an alarm, eliminating security loopholes. This makes it particularly suitable for unattended rural power grids and residential photovoltaic areas. Furthermore, it eliminates the need for complex control circuits; the pure hardware circuit design results in a low failure rate, high reliability, long battery life, and minimal maintenance. In addition, the interlocking mechanism between the locking rod 82 and the key lock cylinder 8 prevents both circuits from being simultaneously active, simplifying the circuit setup.

[0053] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0054] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0055] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A protective power metering box with a viewing window, characterized in that, The container includes a box body with a door, and a viewing window device is provided on the box body. The viewing window device includes an inner frame, an outer frame, an inner partition, an outer protective panel, and a glass plate. The door has an opening. The inner frame and outer frame are respectively located on the inner and outer sides of the opening, and both are provided with track portions on the left and right sides of the opening. The glass plate is located between the inner frame and the outer frame. Both sides of the inner partition and the outer protective panel are provided with slider portions adapted to the track portions. The outer side of both slider portions is provided with a first rack portion along its sliding direction. The door is equipped with a pivot, one end of which extends out of the box body and is equipped with an external gear that meshes with the first rack portion of the outer protective plate. The other end of the pivot extends into the box body and is equipped with an internal gear that meshes with the first rack portion of the inner partition. During vertical movement, the inner partition and the outer protective plate have a closed position with the folded glass panel and an open position with the exposed glass panel. The door is equipped with a first limiting structure corresponding to the open position of the inner partition and / or the outer protective plate, and a second limiting structure is equipped on the door corresponding to the closed position of the inner partition and / or the outer protective plate.

2. The protective power metering box with a viewing window according to claim 1, characterized in that, The first limiting structure includes a limiting block disposed on the inner wall of the door, and when the inner partition is in the open position, its lower end face abuts against the limiting block.

3. A protective power metering box with a viewing window according to claim 2, characterized in that, The door is provided with a housing outside the external gear. The second limiting structure includes a positioning plate, a moving plate and a positioning spring. The moving plate is slidably disposed toward the first rack portion. The positioning plate is disposed on the side of the moving plate near the first rack portion, and a positioning end adapted to it is disposed at the end of the moving plate near the first rack portion. There are two positioning springs, which are disposed at intervals on the side of the moving plate away from the first rack portion and abut against the inner wall of the housing on that side. A locking opening is formed between the moving plate, the housing and the two positioning springs, and a locking element is disposed in the locking opening.

4. A protective power metering box with a viewing window according to claim 1, characterized in that, An inner cavity is provided between the inner side of the glass plate and the inner partition, and an outer cavity is provided between the outer side of the glass plate and the outer protective plate.

5. A protective power metering box with a viewing window according to claim 4, characterized in that, A cleaning component is provided on the end face of the inner partition facing the glass plate. The cleaning component includes a fixing frame and a scraper. The fixing frame is located on the upper part of the inner partition and is located near the top of the glass plate. It has a through hole. The scraper includes a mounting part embedded in the fixing frame and a scraper part extending toward the glass plate.

6. A protective power metering box with a viewing window according to claim 5, characterized in that, The inner frame has a collection chamber at the bottom of its inner opening, and an inlet is inclined at the top of the collection chamber. The side of the inlet near the glass plate slopes downward. The collection chamber is set against the glass plate, and at least its side wall near the glass plate is made of transparent material.

7. A protective power metering box with a viewing window according to claim 3, characterized in that, The door is equipped with a key lock cylinder, and a lock plate is connected to one end of the key lock cylinder inside the box. The lock plate includes a first end and a second end set at an angle. The first end is used to lock with the box body. A transmission gear is set at one end of the rotating shaft inside the box. A lock rod is vertically slidably set on the inner wall of the box. The lock rod includes a second rack part, a lock plate part and a relief groove part. The second rack part is set on the side of the lock rod close to the transmission gear and meshes with it. The lock plate part and the relief groove part are set along the length direction of the lock rod. When the outer protective plate and the inner partition are in the closed position, the second end is aligned with the clearance groove, allowing the locking plate to rotate freely. When the outer protective plate and the inner partition are in the open position, the second end is aligned with the locking plate, preventing the locking plate from rotating.

8. A protective power metering box with a viewing window according to claim 7, characterized in that, The inner wall of the door is provided with two track plates at intervals. The track plates are provided with sliding grooves. The two sides of the locking rod are provided with rollers that slide and cooperate with the sliding grooves. When the outer guard plate and the inner partition are in the closed position, the second end is aligned with the clearance groove, so that the roller abuts against the upper end of the sliding groove. When the outer guard plate and the inner partition are in the open position, the second end is aligned with the locking plate, so that the roller abuts against the lower end of the sliding groove.

9. A protective power metering box with a viewing window according to claim 7, characterized in that, A base box is located on the inner wall of the door, on one side of the locking rod. A micro switch and a micro power supply are installed in the base box. A warning light is installed on the outer wall of the door, corresponding to the base box. The micro switch includes a first trigger spring. A trigger protrusion is located on the side of the locking rod near the base box. The free end of the first trigger spring is located on the moving path of the trigger protrusion. When the outer protective plate and the inner partition are in the closed position, the trigger protrusion presses against the first trigger spring, and the warning light is turned off. When the outer protective plate and the inner partition are not in the closed position, the warning light emits a warning.

10. A protective power metering box with a viewing window according to claim 9, characterized in that, The micro switch further includes a housing, a moving contact, a first normally open contact, a first normally closed contact, a second normally open contact, a second normally closed contact, and a second trigger spring. The moving contact includes a fixed part and a first movable part and a second movable part arranged in parallel. The fixed part is electrically connected to a micro power supply. The first normally open contact and the first normally closed contact are disposed on both sides of the first movable part. The second normally open contact and the second normally closed contact are disposed on both sides of the second movable part. The first normally closed contact and the second normally closed contact are electrically connected to the micro power supply. The first trigger spring and the second trigger spring are respectively located on both sides of the housing. A first trigger rod is disposed between the first trigger spring and the first movable part. A second trigger rod is disposed between the second trigger spring and the second movable part. The free end of the second trigger spring is located on the rotation path of the first end. Under normal conditions, the first movable part is electrically connected to the first normally closed contact, and the second movable part is electrically connected to the second normally open contact. When the outer protective plate and the inner partition are in the closed position, the trigger protrusion presses against the first trigger spring, the first movable part is electrically connected to the first normally open contact, and the warning light is disconnected from the miniature power supply. When the outer protective plate and the inner partition are not in the closed position, the first movable part is electrically connected to the first normally closed contact, so that the warning light is connected to the miniature power supply and emits a warning. When the key lock cylinder is in the locked state, the second movable part is electrically connected to the second normally open contact, and the warning light is disconnected from the micro power supply. When the key lock cylinder is in the unlocked state, the first end presses against the second trigger spring, and the second movable part is electrically connected to the second normally closed contact, so that the warning light is connected to the micro power supply and emits a warning.

Images