An electric energy metering box with gas fire extinguishing device

Abstract

The application relates to an electric energy metering box with a gas fire extinguishing device and relates to the technical field of smart power grids, which comprises a box body, a box door rotatably installed on the front side of the box body, a heat dissipation opening formed in the middle of the left and right side surfaces of the box body, a wiring opening formed in the lower part of the box body, a small gas fire extinguishing tank detachably installed on the inner wall of the box body, a protection plate rotatably connected to the rear edge of the bottom surface of the box body, locking pieces arranged on the left and right side surfaces of the box body, an installation through groove formed in the protection plate, an elastic supporting plate rotatably connected to the bottom wall of the installation through groove, a fixed clamping block fixedly arranged on the side of the elastic supporting plate away from the first rotating shaft, and a fixed clamping groove formed in the inner wall of the installation through groove away from the first rotating shaft. In the application, when the protection plate is in a protection state, the protection plate can be fully abutted with the bottom surface of the box body, the bottom surface of the box body is closed and protected, and the impact and collision of hard materials and metal machines on the construction site can be effectively resisted.

Description

Technical Field

[0001] This application relates to the technical field of smart grids, and in particular to an energy metering box with a gas fire extinguishing device. Background Technology

[0002] With the widespread adoption of smart grid temporary power distribution projects, the application of wall-mounted power metering boxes at construction sites continues to expand. Construction sites experience complex electrical loads and dense wiring, with meters, terminal blocks, and branch switches operating under constant load, making them highly susceptible to internal electrical fires due to overload or loose connections. The perfluorohexanone miniature gas fire extinguishing device (also known as a small gas fire extinguishing cylinder) has become the mainstream fire protection component for confined spaces. The cylinder is filled with insulating and clean perfluorohexanone extinguishing agent, and a flexible fire detection tube is installed along the internal cables. It requires no external power supply and relies on the internal pressure for autonomous activation. When a high-temperature open flame appears inside the box, the fire detection tube ruptures due to heat, rapidly vaporizing and ejecting the agent. Through a dual mechanism of cooling and chemical inhibition, the fire is quickly extinguished. The agent leaves no residue and does not corrode precision metering components, making it suitable for the fire protection needs of sealed metering boxes and temporary distribution cabinets.

[0003] The existing power metering box for fire extinguishing devices includes a cabinet and a flip-up door. Ventilation vents on the side walls ensure heat dissipation for the equipment, and the bottom features independent wiring channels for neatly arranged power and data cables. The left side of the box has a main cable inlet, while the right side has multiple branch outlets evenly distributed to meet the site's one-meter-per-household, multi-line wiring specifications. To ensure stable installation of small gas fire extinguishing cylinders, an integrated clamping structure is installed inside the box to limit cylinder movement and prevent construction vibrations from causing the fire extinguishing device's piping to loosen or leak pressure. After wall-mounted installation, the bottom of the box is 1.5 to 2 meters above the ground, relying on its own cold-rolled steel plate base for basic protection. The zoned wiring structure reduces the risk of fire from cable entanglement and contact heating, accommodating both temporary site power metering and internal fire self-extinguishing functions.

[0004] In the aforementioned technologies, even though the bottom of the metering box is about 1.5 meters off the ground after being installed on the wall at the construction site, the leading edge of the bottom of the box may still be subjected to impacts and bumps from hard materials and metal tools due to factors such as cross-construction work, material transport by handcarts, tool handling, waste cleaning, and temporary material slippage. Furthermore, the bottom of the box generally uses a conventional thin steel plate single-layer structure, which is prone to dents and deformation after impacts. This not only damages the bottom wiring channel and squeezes the internal cables, but also makes the paint surface of the box susceptible to moisture and corrosion, further weakening the structural strength and grounding reliability of the box, indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide an electrical energy metering box with a gas fire extinguishing device, which solves the problems in the above-mentioned related technologies where the thin steel plate at the bottom of the box is easily deformed and corroded by hard objects on the construction site, which can squeeze cables, damage grounding, and cause leakage and failure due to the pulling of fire extinguishing pipelines.

[0006] The electrical energy metering box with a gas fire extinguishing device provided in this application adopts the following technical solution: An electrical metering box with a gas extinguishing device includes a box body, a door rotatably mounted on the front side of the box body, a heat dissipation vent in the middle of the left and right sides of the box body, and a wiring port in the lower part of the left and right sides of the box body. A small gas extinguishing canister is detachably mounted on the inner wall of the box body. A protective plate is rotatably connected to the rear edge of the bottom surface of the box body. The rotating surface of the protective plate is parallel to the left and right sides of the box body. The protective plate can rotate forward to a protective state that abuts against the bottom surface of the box body, and rotate downward to a vertically downward receiving state. The left and right sides of the box body are provided with limiting and fixing functions for the protective plate in the protective state and the receiving state. Locking element; when the protective plate is in the receiving state, an installation slot is provided on the front side, and an elastic receiving plate with elastic elongation properties is rotatably connected to the bottom wall of the installation slot via a first rotating shaft; a fixing block is fixed on the side of the elastic receiving plate away from the first rotating shaft, and a fixing slot is provided on the inner wall of the installation slot away from the first rotating shaft; when the protective plate is in the protective state, the elastic receiving plate rotates to the blocking state within the installation slot, and the fixing block is engaged in the fixing slot; when the protective plate is in the receiving state, the elastic receiving plate rotates to the horizontal forward-facing receiving state.

[0007] By adopting the above technical solution, the protective plate rotatably connected at the rear edge of the bottom of the box can flexibly switch between a protective state and a support state. When the protective plate is in the protective state, it can fully abut against the bottom of the box, forming a closed protection for the bottom of the box. This effectively resists impacts and collisions from hard materials and metal tools at the construction site, avoiding problems such as deformation and denting of the thin steel plate structure at the bottom of the box, paint damage and corrosion. It also eliminates the hidden dangers of deformation at the bottom of the box squeezing internal cables, damaging the grounding structure, and causing leakage and failure due to pulling on the pipeline of small gas fire extinguishers. When the protective plate is in the support state, it can work with the elastic support plate to form an extended load-bearing structure. After the elastic support plate is switched to the horizontal forward-facing accommodating state, it can provide a dedicated storage area for the maintenance and repair of the electricity metering box. It can temporarily place maintenance tools and maintenance miscellaneous items without the need for an additional storage platform, greatly improving the convenience and standardization of maintenance operations and adapting to the maintenance and repair needs of metering boxes at construction sites.

[0008] Optionally, an installation block is fixed on the inner wall of the box, and an installation groove is provided on the top surface of the installation block for the lower part of the small gas fire extinguishing canister to be inserted.

[0009] By adopting the above technical solution, the mounting block fixed on the inner wall of the box and the mounting groove opened on the top surface of the mounting block for the lower part of the small gas fire extinguishing tank to be inserted can achieve precise positioning and limited installation of the small gas fire extinguishing tank. It abandons the limitations of the traditional single clamp fixing method. The assembly structure of the slot connection fits the lower shape of the small gas fire extinguishing tank, which can restrict the radial and axial displacement of the small gas fire extinguishing tank in all directions.

[0010] Optionally, a guide slope is provided on the outer edge of the side of the fixing block away from the elastic support plate.

[0011] By adopting the above technical solution, the guide slope set on the outer edge of the side of the fixing block away from the elastic support plate can provide a smooth guide for the assembly action of the fixing block being inserted into the fixing slot when the elastic support plate switches to the blocking state in the installation through groove. This effectively reduces the difficulty of the alignment between the fixing block and the fixing slot, and avoids the problem of structural wear and jamming caused by the fixing block hitting the opening of the fixing slot.

[0012] Optionally, an extension plate is vertically fixed on the side of the protective plate away from the first rotating shaft, and a gripping plate is vertically fixed on the side of the extension plate away from the protective plate; when the protective plate is in the protective state, the extension plate is in a vertically upward state abutting against the lower edge of the front side of the box, and the gripping plate is in a horizontal forward state at this time; when the protective plate is in the receiving state, the top surface of the extension plate is flush with the bottom wall of the mounting groove at this time.

[0013] By adopting the above technical solution, the vertically fixed extension plate on the side of the protective plate away from the first rotating shaft, and the vertically fixed gripping plate on the outside of the extension plate, can form a full-coverage protection on the lower front edge of the box when the protective plate is in the protective state. This fills the protection blind spot at the front edge of the box bottom, further resisting impacts and frictional wear from external hard objects, and providing all-round protection for the bottom structure of the box. When the protective plate is in the receiving state, the top surface of the extension plate is flush with the bottom wall of the mounting groove, which can form a bottom auxiliary support for the unfolded elastic receiving plate, increase the load-bearing support area of ​​the elastic receiving plate, improve the structural stability of the elastic receiving plate when bearing maintenance tools and debris, effectively prevent the elastic receiving plate from bending or shaking under force, and enhance the overall load-bearing and protective performance.

[0014] Optionally, the locking component includes a locking plate rotatably mounted on the rear edge of the left and right sides of the housing via a second pivot. The locking plate has a locking opening, and the rotating surface of the locking plate is parallel to the top surface of the housing. A vertically downward-facing locking rod with elastic shortening properties is fixedly provided on the lower part of the side of the locking plate away from the second pivot. A locking hook is fixedly provided at the lower end of the locking rod near the outer periphery of the locking plate. A fixing component is provided on the lower part of the left and right sides of the housing. When the protective plate is in the receiving state, a positioning rod is rotatably connected to the upper part of the left and right sides. The rotating surface of the positioning rod is parallel to the front side of the housing. When the protective plate is in the receiving state, the locking plate rotates to a fixed state parallel to the front side of the housing. The positioning rod rotates to a horizontal state. A first slot for the locking hook to engage is provided on the bottom surface of the end of the positioning rod away from the housing. When the protective plate is in the protective state, the locking plate rotates to a positioning state perpendicular to the front side of the housing. The positioning rod rotates forward to a state perpendicular to the front side of the housing and is fixed by the fixing component. A second slot for the locking hook to engage is provided on the bottom surface of the front end of the positioning rod. The locking opening coincides with the heat dissipation vent.

[0015] By adopting the above technical solution, the locking components on the left and right sides of the enclosure can accurately limit and fix the protective plate in both the protective and receiving states. Through the cooperative structure of a rotatable locking plate, a locking rod with elastic shortening properties, a locking hook and positioning rod, a first slot, and a second slot, the locking requirements of the protective plate in both working states are accommodated. When the protective plate is in the receiving state, the locking hook engages with the first slot to lock it in operation, while simultaneously offsetting the heat dissipation vent for easy cleaning. When the protective plate is in the protective state, the locking hook engages with the second slot to achieve normal protective locking, with the locking opening coinciding with the heat dissipation vent to ensure the normal operation of the heat dissipation structure. This dual-condition precise locking effectively avoids problems such as loosening of the protective plate during operation and displacement in normal operation, improving the overall stability of the equipment.

[0016] Optionally, a barrier mesh is fixed on the inner wall of the locking port.

[0017] By adopting the above technical solution, the barrier net fixedly installed on the inner wall of the locking port can form a shielding and protective structure for the heat dissipation vents on the left and right sides of the box when the locking plate is in the positioning state and the locking port coincides with the heat dissipation vent. Under the premise of not blocking the ventilation channel of the heat dissipation vent and not affecting the normal heat dissipation and ventilation of the equipment inside the box, it can effectively prevent dust, sand, debris, insects and other foreign objects from the construction site from entering the box through the heat dissipation vent.

[0018] Optionally, the fixing component includes a fixing rod that is slidably mounted on the left and right sides of the box and installed vertically, and an elastic pressing component provided on the left and right sides of the box for driving the fixing rod to move upward. The positioning rod has a fixing slot on its top surface when the locking hook is engaged in the second slot. When the locking plate is in the positioning state and the locking hook is engaged in the second slot, the lower end face of the fixing rod coincides with the fixing slot. At this time, the bottom surface of the locking plate presses against the upper end face of the fixing rod, and the fixing rod moves downward and inserts into the fixing slot.

[0019] By adopting the above technical solution, the fixed rods vertically sliding on the left and right sides of the housing cooperate with the fixed slots on the top surface of the positioning rod. When the locking plate is in the positioning state and the locking hook is engaged in the second slot, the fixed rod is driven to move down and insert into the fixed slot by the squeezing action of the bottom surface of the locking plate, thus achieving rigid locking and fixing of the positioning rod. This structure can completely restrict the rotational displacement of the positioning rod, prevent the positioning rod from deflecting or loosening due to external disturbances, ensure the stability of the protective plate's protective state, and avoid the protective structure from loosening and failing under normal conditions. At the same time, relying on the mechanical squeezing locking structure, the locking force is uniform and stable, requiring no additional fasteners. The structure is simple and has high locking reliability, making it suitable for long-term outdoor construction site use scenarios.

[0020] Optionally, the elastic compression member includes a compression spring in a compressed state, a guide block fixed on the housing, and a protruding plate fixed on the outer periphery of the fixing rod. The guide block is located below the protruding plate, and a guide hole is provided on the guide block for the fixing rod to pass through. The two ends of the compression spring are fixedly connected to the top surface of the guide block and the bottom surface of the protruding plate, respectively.

[0021] By adopting the above technical solution, the compression spring in a compressed state can continuously apply an upward elastic force to the protruding plate. During equipment maintenance and unlocking, it can automatically push the fixing rod upward, allowing the fixing rod to quickly disengage from the fixing slot, thus achieving convenient unlocking of the positioning rod and simplifying the maintenance operation process. In the normal locking state, the reverse elastic force of the compression spring can cooperate with the squeezing force of the locking plate to keep the fixing rod in a stable and tight state, improving the tightness and vibration resistance of the locking structure.

[0022] Optionally, a guide slope is provided at the outer edge of the upper end face of the fixing rod.

[0023] By adopting the above technical solution, the guide slope set at the outer edge of the upper end face of the fixing rod can guide and divert the extrusion force of the locking plate when the locking plate rotates to the positioning state and presses down on the upper end face of the fixing rod. This converts the vertical extrusion force into a lateral component force that drives the fixing rod to move down, reducing the difficulty of pressing down and aligning the locking plate, and avoiding hard docking and jamming between the upper end face of the fixing rod and the bottom surface of the locking plate, as well as structural collision damage.

[0024] Optionally, the housing is fixed with an upward-facing airflow guide shroud at the inner edge of the heat dissipation vent.

[0025] By adopting the above technical solution, the upward-facing structure can form a shield and protection, effectively preventing rainwater, dust, and debris from directly entering the box from the heat dissipation vent, reducing the accumulation of moisture and impurities, protecting the pipelines and precision metering components of the small gas fire extinguishing tank inside the box, and reducing the probability of equipment corrosion, short circuits, and failure of fire extinguishing devices.

[0026] In summary, this application includes the following beneficial technical effects: In this application, when the protective plate is in the protective state, it can fully contact the bottom surface of the box, forming a closed protection for the bottom surface of the box, effectively resisting the impact and collision of hard materials and metal tools at the construction site; when the protective plate is in the receiving state, the elastic receiving plate switches to a horizontal and forward-facing receiving state, which can temporarily place maintenance tools and maintenance debris, without the need to build an additional platform. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional structural diagram illustrating the installation and mating of the mounting blocks in an embodiment of this application; Figure 3 This is a schematic diagram illustrating the installation and assembly of the protective components in an embodiment of this application; Figure 4 This is a partial structural diagram illustrating the installation and cooperation of the protective plate and the elastic support plate in an embodiment of this application; Figure 5 This is a partial structural diagram illustrating the installation and mating of the locking component in an embodiment of this application; Figure 6 This is a partially exploded schematic diagram illustrating the installation and cooperation of the locking plate and locking rod in an embodiment of this application; Figure 7 This is a partial structural diagram illustrating the installation and cooperation of the fixed rod and the elastic compression member in an embodiment of this application.

[0028] In the diagram, 1. Box body; 11. Heat dissipation vent; 12. Wiring port; 13. Flow guide; 14. Mounting block; 141. Mounting groove; 2. Box door; 3. Small gas fire extinguishing canister; 4. Protective components; 41. Protective plate; 411. Mounting through groove; 412. Fixing slot; 42. Extension plate; 43. Grip plate; 44. Elastic support plate; 45. Fixing block; 451. Guide slope; 5. Locking component; 51. Locking plate; 511. Locking port; 52. Barrier net; 53. Locking rod; 54. Locking hook; 6. Positioning rod; 61. First slot; 62. Second slot; 63. Fixing slot; 7. Fixing component; 71. Fixing rod; 711. Guide slope; 72. Elastic compression component; 721. Compression spring; 722. Guide block; 723. Protruding plate. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings.

[0030] Example: Reference Figure 1 and Figure 2 An electrical metering box with a gas extinguishing device includes a box body 1 and two doors 2 rotatably mounted on the front side of the box body 1. A heat dissipation vent 11 is provided on the middle of the left and right sides of the box body 1, and a wiring port 12 is provided on the lower part. A guide hood 13 with an upward opening is fixed on the inner edge of the heat dissipation vent 11 of the box body 1. A small gas extinguishing canister 3 is detachably installed on the inner wall of the box body 1. An installation block 14 is fixed on the inner wall of the box body 1. An installation groove 141 for the lower part of the small gas extinguishing canister 3 to be inserted is provided on the top surface of the installation block 14.

[0031] Reference Figure 3 , Figure 4 and Figure 5 The box 1 is provided with a protective component 4 at the bottom. The protective component 4 includes a protective plate 41 rotatably connected to the rear edge of the bottom surface of the box 1. The rotating surface of the protective plate 41 is parallel to the left and right sides of the box 1. The protective plate 41 can rotate forward to a protective state that abuts against the bottom surface of the box 1, and rotate downward to a vertically downward receiving state. The left and right sides of the box 1 are provided with locking members 5 that limit and fix the protective plate 41 in the protective state and the receiving state. When the protective plate 41 is in the receiving state, an installation through groove 411 is provided on the front side. At this time, an elastic receiving plate 44 with elastic elongation properties is rotatably connected to the bottom wall of the installation through groove 411 via a first rotating shaft. The elastic receiving plate 44 is a conventional plate-shaped telescopic structure with an internal spring, which will not be described in detail here. A fixing block 45 is fixed on the side of the elastic receiving plate 44 away from the first rotating shaft, and a guide slope 451 is provided on the outer edge of the side of the fixing block 45 away from the elastic receiving plate 44. A fixing groove 412 is provided on the inner wall of the installation through groove 411 away from the first rotating shaft. When the metering box is in normal use, the protective plate 41 is in a protective state, and the elastic support plate 44 is rotated to a blocking state within the mounting slot 411. The fixing block 45 is then inserted into the fixing slot 412, thereby using the protective plate 41 and the elastic support plate 44 to protect the bottom surface of the box 1. When the metering box is under maintenance, the protective plate 41 is in a receiving state, and the elastic support plate 44 is rotated to a horizontal forward-facing receiving state. At this time, the tools and debris required during maintenance can be temporarily placed on the top surface of the elastic support plate 44.

[0032] Reference Figure 4 and Figure 5An extension plate 42 is vertically fixed on the side of the protective plate 41 away from the first rotating shaft, and a gripping plate 43 is vertically fixed on the side of the extension plate 42 away from the protective plate 41. When the protective plate 41 is in the protective state (that is, when the metering box is in normal use), the extension plate 42 is in a vertically upward state abutting against the lower edge of the front side of the box body 1, and the gripping plate 43 is in a horizontal forward state, thereby using the gripping plate 43 and the extension plate 42 to protect the front edge of the bottom surface of the box body 1. When the protective plate 41 is in the receiving state (that is, when the metering box is under maintenance), the top surface of the extension plate 42 is flush with the bottom wall of the mounting groove 411, thereby strengthening the support stability of the elastic receiving plate 44 in this state.

[0033] Reference Figure 4 , Figure 5 and Figure 6 The locking component 5 includes a locking plate 51 rotatably mounted on the rear edge of the left and right sides of the housing 1 via a second rotating shaft. The locking plate 51 has a locking opening 511, and a barrier net 52 is fixed on the inner wall of the locking opening 511. The rotating surface of the locking plate 51 is parallel to the top surface of the housing 1. A vertically downward locking rod 53 with elastic shortening performance is fixed on the lower part of the side of the locking plate 51 away from the second rotating shaft. A locking hook 54 is fixed on the lower end of the locking rod 53 near the outer periphery of the locking plate 51. The lower part of the left and right sides of the housing 1 is provided with a fixing component 7. When the protective plate 41 is in the receiving state, the upper part of the left and right sides is rotatably connected with a positioning rod 6. The rotating surface of the positioning rod 6 is parallel to the front side of the housing 1 at this time. When the protective plate 41 is in the receiving state (that is, when the metering box is under maintenance), the locking plate 51 is rotated to a fixed state parallel to the front side of the box 1, and the positioning rod 6 is rotated to a horizontal state. The bottom surface of the end of the positioning rod 6 away from the box 1 is provided with a first slot 61 for the locking hook 54 to be engaged, thereby realizing the limiting and fixing of the protective plate 41 in this state, and also removing the protection of the heat dissipation vent 11 by the barrier net 52, making it convenient for the staff to clean the inner wall of the heat dissipation vent 11 at this time. When the protective plate 41 is in the protective state (that is, when the metering box is in normal use), the locking plate 51 is rotated to a position perpendicular to the front side of the box body 1. The positioning rod 6 is then rotated forward to a position perpendicular to the front side of the box body 1 and fixed by the fixing piece 7. At this time, a second slot 62 for the locking hook 54 to be engaged is opened on the bottom surface of the front end of the positioning rod 6. The locking port 511 is then aligned with the heat dissipation port 11. At this time, the heat dissipation port 11 is further protected by the barrier net 52 to reduce the possibility of external impurities entering the interior of the box body 1 from the heat dissipation port 11.

[0034] Reference Figure 5 , Figure 6 and Figure 7The fixing component 7 includes two fixing rods 71 ​​that are slidably arranged side by side on the left and right sides of the box body 1 and installed vertically, and an elastic extrusion component 72 that is provided on the left and right sides of the box body 1 to drive the fixing rods 71 ​​to move upward. The outer edge of the upper end face of the fixing rod 71 is provided with a guide slope 711. The positioning rod 6 has a fixing slot 63 on its top surface when the locking hook 54 is engaged in the second slot 62. The elastic compression member 72 includes a compression spring 721 in a compressed state, a guide block 722 fixed on the housing 1, and a protruding plate 723 fixed on the outer periphery of the fixing rod 71. The guide block 722 is located below the protruding plate 723. The guide block 722 has a guide hole for the fixing rod 71 to pass through. The two ends of the compression spring 721 are fixedly connected to the top surface of the guide block 722 and the bottom surface of the protruding plate 723, respectively. When the locking plate 51 is in the positioning state and the locking hook 54 is engaged in the second slot 62 (that is, when the metering box is in normal use), the lower end face of the fixing rod 71 coincides with the fixing slot 63. At this time, the bottom surface of the locking plate 51 presses against the upper end face of the fixing rod 71, and the fixing rod 71 moves down and inserts into the fixing slot 63, thereby limiting and locking the positioning rod 6 at this time. Alternatively, the two fixing rods 71 ​​can be used to protect the front and rear sides of the wiring port 12.

[0035] The implementation principle of this application embodiment is as follows: When the electricity metering box is in normal use, the protective plate 41 is rotated forward to the protective state, the elastic receiving plate 44 is rotated and stored in the installation slot 411, and the fixing block 45 is inserted into the fixing slot 412 with the help of the guide slope 451, forming a barrier fixing structure, which cooperates with the protective plate 41 to protect the bottom surface of the box body 1. The extension plate 42 is vertically upward and attached to the lower edge of the front side of the box body 1, and the holding plate 43 is horizontally forward, protecting the front edge of the bottom surface of the box body 1. The locking plate 51 is rotated to be perpendicular to the front side of the box body 1, and the locking opening 511 coincides with the heat dissipation opening 11, which is protected by the barrier net 52. The positioning rod 6 is forward and perpendicular to the front side of the box body 1, and the locking hook 54 at the lower end of the locking rod 53 is inserted into the second slot 62. The bottom surface of the locking plate 51 presses the fixing rod 71 downward, so that the fixing rod 71 is inserted into the fixing slot 63 on the top surface of the positioning rod 6. With the help of the compression spring 721 in a compressed state, the positioning rod 6 is locked, and the overall protective structure is stabilized.

[0036] During the maintenance and repair of the electricity metering box, force is applied to disengage the locking hook 54 from the second slot 62, and then the locking plate 51 is rotated to a fixed state parallel to the front side of the box body 1. Then, the spring 721 is squeezed to move the fixing rod 71 upward, causing it to disengage from the fixing slot 63 of the positioning rod 6. The protective plate 41 is then rotated to the receiving state, and the positioning rod 6 is rotated upward to a horizontal state. At this time, the locking hook 54 is engaged in the first slot 61. Subsequently, the locking structure of the elastic receiving plate 44 is pressed down, and it is rotated outward to a horizontal and forward-facing receiving state. At this time, the locking plate 51 is offset from the heat dissipation vent 11, the obstruction of the barrier net 52 is removed, the inner wall of the heat dissipation vent 11 can be cleaned, and the unfolded elastic receiving plate 44 can be temporarily placed to hold maintenance tools and maintenance debris, providing stable support for maintenance work. The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. An electrical energy metering box with a gas fire extinguishing device, comprising a box body (1), a box door (2) rotatably mounted on the front side of the box body (1), a heat dissipation vent (11) on the middle of the left and right sides of the box body (1), a wiring port (12) on the lower part of the box body (1), and a small gas fire extinguishing canister (3) detachably mounted on the inner wall of the box body (1); characterized in that, A protective plate (41) is rotatably connected to the rear edge of the bottom surface of the box (1). The rotating surface of the protective plate (41) is parallel to the left and right sides of the box (1). The protective plate (41) can rotate forward to a protective state that abuts against the bottom surface of the box (1) and rotate downward to a vertically downward receiving state. Locking parts (5) are provided on the left and right sides of the box (1) to limit and fix the protective plate (41) in the protective state and the receiving state. When the protective plate (41) is in the receiving state, an installation slot (411) is provided on the front side. At this time, an elastic receiving plate (44) with elastic elongation properties is rotatably connected to the bottom wall of the installation slot (411) through a first rotating shaft. A fixing block (45) is fixed on the side of the elastic receiving plate (44) away from the first rotating shaft. A fixing slot (412) is provided on the inner wall of the installation slot (411) away from the first rotating shaft. When the protective plate (41) is in the protective state, the elastic receiving plate (44) rotates to the blocking state in the installation slot (411), and the fixing block (45) is inserted into the fixing slot (412). When the protective plate (41) is in the receiving state, the elastic receiving plate (44) rotates to the horizontal forward-facing receiving state.

2. The power metering box with a gas fire extinguishing device according to claim 1, characterized in that, An installation block (14) is fixed on the inner wall of the box (1), and an installation groove (141) is provided on the top surface of the installation block (14) for the lower part of the small gas fire extinguishing canister (3) to be inserted.

3. The power metering box with a gas fire extinguishing device according to claim 1, characterized in that, The fixing block (45) has a guide slope (451) on the outer edge of its side away from the elastic support plate (44).

4. An electricity metering box with a gas fire extinguishing device according to claim 1, characterized in that, An extension plate (42) is vertically fixed on the side of the protective plate (41) away from the first rotating shaft, and a gripping plate (43) is vertically fixed on the side of the extension plate (42) away from the protective plate (41). When the protective plate (41) is in the protective state, the extension plate (42) is in a vertically upward position that abuts against the lower front edge of the box (1), and the gripping plate (43) is in a horizontal forward position at this time; when the protective plate (41) is in the receiving state, the top surface of the extension plate (42) is flush with the bottom wall of the mounting slot (411).

5. An electricity metering box with a gas extinguishing device according to claim 1, characterized in that, The locking component (5) includes a locking plate (51) rotatably mounted on the rear edge of the left and right sides of the box (1) via a second rotating shaft. The locking plate (51) has a locking opening (511) and the rotating surface of the locking plate (51) is parallel to the top surface of the box (1). A vertically downward locking rod (53) with elastic shortening performance is fixedly provided on the lower part of the side of the locking plate (51) away from the second rotating shaft. A locking hook (54) is fixedly provided at the lower end of the locking rod (53) near the outer periphery of the locking plate (51). A fixing component (7) is provided on the lower part of the left and right sides of the box (1). When the protective plate (41) is in the receiving state, a positioning rod (6) is rotatably connected to the upper part of the left and right sides. The rotating surface of the positioning rod (6) is parallel to the front side of the box (1). When the protective plate (41) is in the receiving state, the locking plate (51) rotates to a fixed state parallel to the front side of the box (1), and the positioning rod (6) rotates to a horizontal state. At this time, the bottom surface of the end of the positioning rod (6) away from the box (1) is provided with a first slot (61) for the locking hook (54) to be engaged. When the protective plate (41) is in the protective state, the locking plate (51) rotates to a positioning state perpendicular to the front side of the box (1), and the positioning rod (6) rotates forward to a state perpendicular to the front side of the box (1) and is fixed by the fastener (7). At this time, the bottom surface of the front end of the positioning rod (6) is provided with a second slot (62) for the locking hook (54) to be engaged. The locking opening (511) coincides with the heat dissipation opening (11).

6. An electricity metering box with a gas extinguishing device according to claim 5, characterized in that, A barrier mesh (52) is fixed on the inner wall of the locking port (511).

7. An electricity metering box with a gas extinguishing device according to claim 5, characterized in that, The fixing member (7) includes a fixing rod (71) that slides on the left and right sides of the box (1) and is installed vertically, and an elastic extrusion member (72) that is provided on the left and right sides of the box (1) to drive the fixing rod (71) to move upward. The positioning rod (6) has a fixing slot (63) on its top surface when the locking hook (54) is engaged in the second slot (62). When the locking plate (51) is in a positioning state and the locking hook (54) is engaged in the second slot (62), the lower end face of the fixing rod (71) coincides with the fixing slot (63). At this time, the bottom surface of the locking plate (51) presses against the upper end face of the fixing rod (71), and the fixing rod (71) moves down and inserts into the fixing slot (63).

8. An electricity metering box with a gas fire extinguishing device according to claim 7, characterized in that, The elastic compression member (72) includes a compression spring (721) in a compressed state, a guide block (722) fixed on the housing (1), and a protrusion plate (723) fixed on the outer periphery of the fixing rod (71). The guide block (722) is located below the protrusion plate (723). The guide block (722) has a guide hole for the fixing rod (71) to pass through. The two ends of the compression spring (721) are fixedly connected to the top surface of the guide block (722) and the bottom surface of the protrusion plate (723) respectively.

9. An electricity metering box with a gas fire extinguishing device according to claim 7, characterized in that, A guide slope (711) is provided at the outer edge of the upper end face of the fixing rod (71).

10. An electricity metering box with a gas fire extinguishing device according to claim 1, characterized in that, The housing (1) has an upward-facing air guide shroud (13) fixed at the inner edge of the heat dissipation port (11).

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