Directional pressure-relief fireproof and explosion-proof electric energy metering box

Abstract

The invention discloses a directional pressure-relief fireproof and explosion-proof electric energy metering box, and belongs to the field of electrical box frames. Comprising a metering box outer shell, an annular gear disc is fixedly installed in the metering box outer shell, four sets of magnetic suction vent hoods used for being in butt joint with the midpoint positions of the four side edges of the metering box outer shell are fixedly installed on the outer edge of the annular gear disc, and a metal lantern ring frame capable of rotating by 360 degrees is movably installed at the position of the inner side of the annular gear disc; through the combination of the dynamic movable detection end and the rotatable directional pressure relief mechanism, the response and pressure relief safety of the electric energy metering box to local hot spots are improved, the monitoring dead angle and secondary disaster risk caused by a fixed probe and a fixed pressure relief opening in the prior art are solved, and through the hinged outward turning design and the sliding scanning mechanism, the safety of the electric energy metering box is improved. Full-coverage real-time monitoring of the electric energy metering end in the box is achieved, and meanwhile the 360-degree rotation capacity of the metal lantern ring frame enables the directional pressure relief mechanism to be aligned with any preset pressure relief opening.

Description

Technical Field

[0001] This invention relates to the field of electrical box frame technology, and more specifically, to a directional pressure relief fireproof and explosion-proof electrical energy metering box. Background Technology

[0002] As the interface between the power grid and users, the core of the electricity metering box consists of an electricity meter, current transformers, and wiring modules. Because it is sealed within a metal enclosure and operates in complex outdoor environments for extended periods, basic temperature monitoring and heat dissipation units are often integrated inside to ensure safety. For example, cooling fans are installed and activated when the temperature rise exceeds a threshold to ventilate the entire box. However, thermal runaway caused by electrical faults often originates from a tiny, localized point. Global temperature control and heat dissipation strategies have inherent limitations in response speed and specificity when dealing with instantaneously generated localized high temperatures or latent electric arcs.

[0003] In actual operation, the real risks often arise from these unpredictable local hot spots. When a connection becomes loose, causing a sharp increase in contact resistance, or when insulation deterioration generates a tiny electric arc, heat can accumulate in a very short time, forming a highly heated ignition source. Current technology typically addresses this by installing several fixed-position temperature or smoke detectors inside the enclosure, along with independent pressure relief vents and fire extinguishing agent nozzles. Once an anomaly is detected, the system activates fire extinguishing and opens the pre-set pressure relief channel.

[0004] However, the location of hotspots is random, while the orientation of the pressure relief vent is fixed. This often results in high-temperature flames and shock waves not being directed to a safe open side, but instead rushing towards nearby equipment and causing secondary disasters. Although infrared thermal imaging can be introduced to improve detection accuracy, the field of view of fixed-installed cameras is limited, making it difficult for the protection system to accurately lock the precise coordinates of the fire source in the first instance and to directionally relieve pressure according to the actual installation location of the metering box to achieve the effect of fire prevention and explosion protection. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a directional pressure relief fireproof and explosion-proof power metering box, which aims to solve the above-mentioned technical problems.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A directional pressure relief fireproof and explosion-proof electricity metering box includes a metering box shell. A circular gear disk is fixedly installed inside the metering box shell, and four sets of magnetic ventilation covers for docking at the midpoint of the four sides of the metering box shell are fixedly installed on the outer edge of the circular gear disk. A metal collar frame that can rotate 360 ​​degrees is movably installed on the inner side of the circular gear disk. A directional pressure relief mechanism is configured on the metal collar frame, and several electricity metering terminals are assembled on the inner side of the metal collar frame. Two sets of symmetrically arranged ring drive detection units are hinged on the metal collar frame, and the two sets of symmetrically arranged ring drive detection units are mounted on top of several energy metering terminals. The outer surface of the metering box is hinged with an outward-folding viewing door, and each set of ring drive detection units can be attached to the inside of the outward-folding viewing door to synchronously fold outward without interfering with the maintenance of the energy metering terminals. The back of the metering box housing is equipped with an external magnetic drive heat dissipation unit. The magnetic drive end of the external magnetic drive heat dissipation unit is attached to the metal collar frame through the metering box housing, so as to drive the directional pressure relief mechanism to connect with the magnetic vent on either side for directional pressure relief.

[0008] As a further aspect of the present invention: the external magnetic drive heat dissipation unit includes an annular venting sleeve, a first servo motor is fixedly installed at the center of the annular venting sleeve, an annular cooling fan sleeve is fixedly installed on the output end of the first servo motor, a Hall magnetic chuck is fixedly installed at the center of the annular cooling fan sleeve, an outer expansion ring frame is fixedly connected to the side of the Hall magnetic chuck, the outer expansion ring frame is entirely attached to the side wall of the metering box housing, a first magnetic ring connected to the output end of the Hall magnetic chuck is fixedly installed at the outer edge of the outer expansion ring frame, and one end of the metal ring frame attached to the side wall of the metering box housing corresponds to the magnetic attraction of the first magnetic ring.

[0009] As a further aspect of the present invention: the interior of the metering box housing is divided into an inner ring cavity and an outer ring cavity by a metal collar frame. The inner ring cavity is used to supply the operation of several power metering terminals, and the inner ring cavity is not connected to the interior of the annular venting sleeve. The outer ring cavity is located entirely between the circular gear disk and the metal collar frame. Two symmetrical hinged bases are fixedly connected to the surface of the metal collar frame. A ring drive detection unit is hinged to each hinged base. Gas storage arc cavities and dry powder storage arc cavities are fixedly installed on the outer edge of the metal collar frame at positions on both sides of the hinged bases, respectively. The outer ring cavity is connected to the interior of the annular venting sleeve to cool the gas storage arc cavities, dry powder storage arc cavities, and the side walls of the metal collar frame.

[0010] As a further aspect of the present invention: the ring drive detection unit includes an outer flip-up sleeve frame, the outer flip-up sleeve frame extending as a whole toward the center end of the metal collar frame, and a soft rubber arc plate is fixedly installed on the end face of the extended end. A bearing collar is fixedly installed inside the outer flip-up sleeve frame on the side near the hinge base. An elastic sleeve is fixedly installed on the bearing collar frame, which is integrally embedded inside the outer flip-up sleeve frame. An embedded rod is assembled inside the elastic sleeve. Under the elastic properties of the elastic sleeve, the embedded rod has an overall tendency to extend outward, and the extended end passes through the end of the outer flip-up sleeve frame near the hinge base. A bevel gear sleeve head is fixedly installed on the extended end. The bevel gear sleeve head meshes with the circular gear disk in the extended state.

[0011] As a further aspect of the present invention: the ring drive detection unit further includes a bidirectional threaded rod fixedly installed on the end of the elastic sleeve away from the bearing ring. A nut sleeve block is engaged with the bidirectional threaded rod and slidably sleeved in the cavity inside the outward flip frame. A detection module is fixedly installed at the bottom axial position of the nut sleeve block, and spray heads are fixedly installed on both sides of the detection module. The detection end of the detection module is vertically oriented towards the energy metering end, and the spray ends of the spray heads are obliquely aligned with the vertical detection end of the detection module. Magnetic plates are fixedly installed on both sides of the upper surface of the outward flip frame, and are attracted to the inner wall of the outward flip viewing door through the magnetic plates. Soft rubber arc plates are fixedly installed on the side ends of the outward flip frame.

[0012] As a further aspect of the present invention: the ring drive detection unit further includes an L-shaped connecting conduit fixedly installed on the side output end of the gas storage arc cavity and the dry powder storage arc cavity. The L-shaped connecting conduit is a rigid cavity structure and is respectively connected to both sides of the hinge base. Elastic winding modules are fixedly installed on both sides of the outer flip frame near the hinge base. Traction hoses are wound on the elastic winding modules, and the traction hoses on both sides are respectively connected to the spray head and are inserted into the cavity of the L-shaped connecting conduit from the hinge end on the corresponding side to connect the gas storage arc cavity and the dry powder storage arc cavity respectively.

[0013] As a further aspect of the present invention: the directional pressure relief mechanism includes an arc-shaped expanding mask fixedly installed on the side of a metal collar frame. A protective mesh is assembled on the side of the arc-shaped expanding mask facing the center of the metal collar frame. The arc-shaped expanding mask is a hollow structure with an open arc-shaped opening. Several slotted baffles are fixedly connected to one side of the arc-shaped opening. Each slotted baffle is arranged along the arc of the arc-shaped expanding mask. Several parallel slit quenching guide plates are assembled on the slotted baffles. A flow stabilizing unit is configured at the end of the arc-shaped expanding mask away from the protective mesh.

[0014] As a further aspect of the present invention: the current stabilizing unit includes a heat-resistant frame, and a detachable embedded cylindrical cover is inserted and installed inside the heat-resistant frame. A second servo motor is fixedly installed at the center of the detachable embedded cylindrical cover. An adsorption fan is fixedly installed on the output end of the second servo motor, and each blade of the adsorption fan is equipped with a magnetic coating. The end of the detachable embedded cylindrical cover facing the protective mesh cover is open, and an external storage ring cylinder is inserted and installed on the open end. The end face of the external storage ring cylinder is a breathable cover for the adsorption fan to function.

[0015] As a further aspect of the present invention: the flow stabilizing unit further includes a second magnetic ring adsorbed inside the external storage annular cylinder. The second magnetic ring is adsorbed and corresponds to the magnetic coating configured on each fan blade through the vent cover. A number of circumferentially arranged stirring rods are fixedly connected to the side of the second magnetic ring facing the inside of the external storage annular cylinder. A ventilation cover is configured on the opening end of the external storage annular cylinder facing the protective mesh cover.

[0016] As a further embodiment of the present invention: the flow stabilizing unit further includes a magnetic docking sleeve fixedly connected to the end of the heat-resistant sleeve frame away from the detachable embedded cylindrical cover. The magnetic docking sleeve houses an adsorption heat-resistant ring. An infrared docking probe is fixedly installed on the rotating shaft end of the adsorption fan. A circular opening is provided at the center of the adsorption heat-resistant ring for the infrared light emitted by the detection end of the infrared docking probe to be emitted. The infrared light emitted by the detection end of the infrared docking probe docks with the magnetic ventilation cover. A pressure relief cover corresponding to each magnetic ventilation cover is arranged on the outer side of the metering box shell.

[0017] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects: (1) This solution combines a dynamic and movable detection end with a rotatable and directional pressure relief mechanism to improve the response of the power metering box to local hot spots and the safety of pressure relief. It solves the monitoring dead spots and secondary disaster risks caused by fixed probes and fixed pressure relief ports in the existing technology. Through the hinged outward flip design and sliding scanning mechanism, it realizes full coverage real-time monitoring of the power metering end in the box. At the same time, the 360-degree rotation capability of the metal collar frame allows the directional pressure relief mechanism to be aligned with any preset pressure relief port, ensuring that high temperature flames and shock waves are guided to the safe side, avoiding the limitations of fixed pressure relief ports.

[0018] (2) Through magnetic drive non-contact transmission and multi-layer purification structure, heat dissipation, detection and pressure relief are coordinated and controlled. The external magnetic drive heat dissipation unit drives the metal collar frame to rotate through magnetic coupling, which avoids the sealing hazards of mechanical penetration and facilitates precise control of the pressure relief direction. The adsorption fan and stirring rod in the flow stabilization unit stir the adsorbent and purify the harmful components of the flue gas. Combined with the slot turbulence and slit quenching design, the shock wave is effectively reduced and the open flame is extinguished, which can further improve the environmental friendliness of the pressure relief process.

[0019] (3) Overall maintenance is convenient. The synchronous outward flipping mechanism of the outward flipping visual door and the ring drive detection unit allows the detection unit to be maintained without interfering with the power metering end. The pressure relief path is calibrated by the infrared docking probe to ensure alignment accuracy. Overall, the fire and explosion protection reliability of the power metering box in complex environments is significantly improved. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the metering box housing of the present invention; Figure 3 This is a schematic diagram of the annular venting sleeve of the present invention in a half-sectional view; Figure 4 This is a schematic diagram of the internal structure of the metering box shell of the present invention; Figure 5 This is a schematic diagram of the directional pressure relief mechanism of the present invention in its disassembled state; Figure 6 This is a schematic diagram of the outward-facing state of the ring drive detection unit of the present invention; Figure 7 This is a cross-sectional structural schematic diagram of the ring drive detection unit of the present invention; Figure 8 This is a cross-sectional structural schematic diagram of the directional pressure relief mechanism of the present invention; Figure 9 This is a cross-sectional structural diagram of the current stabilization unit of the present invention.

[0022] Figure label: 1. Meter box outer casing; 2. External magnetic drive cooling unit; 21. Annular venting sleeve; 22. First servo motor; 23. Circular cooling fan sleeve; 24. Hall effect magnetic chuck; 25. External expansion ring frame; 26. First magnetic ring; 3. Pressure relief cover; 4. Magnetic vent cover; 5. Circular gear disc; 6. Metal collar frame; 7. Directional pressure relief mechanism; 71. Arc-shaped expansion mask; 72. Protective mesh cover; 73. Groove baffle plate; 74. Slit quenching guide plate; 75. Flow stabilizing unit; 751. Heat-resistant sleeve frame; 752. Removable embedded cylindrical cover; 753. Second servo motor; 754. Adsorption fan; 755. Magnetic coating; 756. External storage ring cylinder; 757. Ventilation cover; 758. Second magnetic ring; 759. Stirring rod; 7510. Ventilation cover; 7511. Magnetic docking sleeve; 7512. Infrared docking probe; 7513. Adsorption heat-resistant ring; 8. Ring drive detection unit; 81. Outward flip-up sleeve frame; 82. L-shaped connecting conduit; 83. Elastic winding module; 84. Traction hose; 85. Bearing collar; 86. Elastic sleeve; 87. Embedded insert rod; 88. Bevel gear sleeve; 89. Bidirectional threaded rod; 810. Nut sleeve block; 811. Detection module; 812. Spray sleeve head; 813. Magnetic suction plate; 814. Soft rubber arc plate; 9. Gas storage arc cavity; 10. Dry powder storage arc cavity; 11. Hinged base; 12. Outward-opening viewing door.

[0023] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0024] The present invention provides a directional pressure relief fireproof and explosion-proof power metering box with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0025] like Figures 1 to 9 As shown, this embodiment of the invention provides a directional pressure relief fireproof and explosion-proof electricity metering box, including a metering box shell 1. A circular gear disk 5 is fixedly installed inside the metering box shell 1, and four sets of magnetic ventilation covers 4 for docking at the midpoint of the four sides of the metering box shell 1 are fixedly installed on the outer edge of the circular gear disk 5. A metal collar frame 6 that can rotate 360 ​​degrees is movably installed on the inner side of the circular gear disk 5. A directional pressure relief mechanism 7 is configured on the metal collar frame 6, and a plurality of electricity metering terminals are assembled on the inner side of the metal collar frame 6. Two sets of symmetrically arranged ring drive detection units 8 are hinged on the metal collar frame 6, and the two sets of symmetrically arranged ring drive detection units 8 are mounted on the top of several energy metering terminals. The outer surface of the metering box shell 1 is hinged with an outward-folding viewing door 12, and each set of ring drive detection units 8 can be attached to the inside of the outward-folding viewing door 12 to synchronously fold outward without interfering with the maintenance of the energy metering terminals. The outer back of the metering box housing 1 is equipped with an external magnetic drive heat dissipation unit 2. The magnetic drive end of the external magnetic drive heat dissipation unit 2 is attached to the metal collar frame 6 through the metering box housing 1, so as to drive the directional pressure relief mechanism 7 to connect to the magnetic vent 4 on either side for directional pressure relief.

[0026] To address the secondary disaster risks caused by fixed pressure relief ports and the delayed response to local hot spots in existing technologies, the above-mentioned technical solution is adopted. This solution mainly consists of a metering box outer shell 1, an external magnetic drive heat dissipation unit 2, a magnetic vent 4, a circular gear disk 5, a metal collar frame 6, a directional pressure relief mechanism 7, and a ring drive detection unit 8. The metering box outer shell 1 serves as the overall support structure, a heat-resistant assembly frame as used in existing technologies. Several energy metering terminals, such as energy meters and current transformers, are assembled inside. A circular gear disk 5 is fixedly installed on the outside of these energy metering terminals. The circular gear disk 5 not only serves as a structural frame but also achieves precise docking with the midpoints of the four sides of the metering box outer shell 1 through four sets of magnetic vent 4 fixedly installed on its outer edge. This ensures the symmetry of the pressure relief path and allows coverage of any side of the box during subsequent pressure relief, providing a basis for directional pressure relief. The configured metal collar frame 6 is movably installed inside the metering box housing 1, and its ability to rotate 360 ​​degrees allows the pressure relief direction to be adjusted according to the actual fire source location, avoiding the limitations of fixed pressure relief ports. The directional pressure relief mechanism 7, configured on the metal collar frame 6, guides the safe discharge of smoke and heat shock waves. The configured ring-driven detection units 8 consist of two sets mounted on top of several energy metering terminals, forming a comprehensive detection network. The symmetrical layout ensures no blind spots in detection, and the hinged connection enables an outward-folding function. When the hinged outward-folding viewing door 12 on the surface of the metering box housing 1 is opened, the ring-driven detection units 8 on both sides can be attached to the inside of the outward-folding viewing door 12, folding outward synchronously with the door. This maintains continuous operation of the detection units without interfering with the maintenance of the energy metering terminals, solving the problems of inconvenient maintenance and limited field of vision caused by fixed installation of detection equipment in existing technologies. Furthermore, the transparency of the outward-folding viewing door 12 allows for visual monitoring. The external magnetic drive heat dissipation unit 2, configured on the back of the metering box housing 1, is attracted and corresponds to the metal collar frame 6 through the metering box housing 1, forming a non-contact magnetic transmission. During operation, this avoids the sealing risks caused by mechanical penetration. On the other hand, the metal collar frame 6 is rotated through magnetic coupling, thereby enabling the directional pressure relief mechanism 7 to engage with the magnetic vent 4 on either side.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the external magnetic drive heat dissipation unit 2 includes an annular venting sleeve 21. A first servo motor 22 is fixedly installed at the center of the annular venting sleeve 21. An annular cooling fan sleeve 23 is fixedly installed on the output end of the first servo motor 22. A Hall magnetic chuck 24 is fixedly installed at the center of the annular cooling fan sleeve 23. An external expansion ring frame 25 is fixedly connected to the side of the Hall magnetic chuck 24. The external expansion ring frame 25 is attached to the side wall of the metering box housing 1. A first magnetic ring 26 connected to the output end of the Hall magnetic chuck 24 is fixedly installed at the outer edge of the external expansion ring frame 25. One end of the metal ring frame 6 attached to the side wall of the metering box housing 1 is magnetically attracted to the first magnetic ring 26.

[0028] The external magnetic drive heat dissipation unit 2 is configured to achieve coordinated control of heat dissipation and directional pressure relief through non-contact magnetic transmission. It is installed on the back of the metering box housing 1 and is tightly fitted to the side wall of the metering box housing 1 to form an external independent module, avoiding the sealing risk caused by internal mechanical penetration. Its annular venting sleeve 21 serves as the basic frame of the external magnetic drive heat dissipation unit 2. Its shape is an annular cavity structure and it is fixedly installed on the back side of the metering box housing 1. The first servo motor 22 is a servo-controllable electric drive in the prior art. Its output end, which serves as the power source, is directly connected to the annular cooling fan sleeve 23. The annular cooling fan sleeve 23 is also annular in design. A Hall magnetic chuck 24 is fixedly installed at its center. An outer expansion ring frame 25 is fixedly connected to the side of the Hall magnetic chuck 24. The outer expansion ring frame 25 is attached to the side wall of the metering box housing 1. A first magnetic ring 26 is fixedly installed at its outer edge. The first magnetic ring 26 is connected to the output end of the Hall magnetic chuck 24 to form a magnetic transmission chain. One end of the metal ring frame 6 attached to the side wall of the metering box housing 1 is magnetically attracted to the first magnetic ring 26, thereby achieving non-contact coupling. In terms of shape design, the annular structure of the annular venting sleeve 21 allows for uniform airflow distribution. Its cavity communicates with the outer annular cavity inside the metering box housing 1, which is located between the circular gear disk 5 and the metal collar frame 6. However, the inner annular cavity used for the operation of the power metering terminal is not connected to the interior of the annular venting sleeve 21, ensuring that the heat dissipation process targets only the outer annular cavity and does not interfere with the normal operation of the power metering terminal. The annular fan blades of the circular cooling fan sleeve 23 rotate under the drive of the first servo motor 22, generating directional airflow. The airflow enters the outer annular cavity through the cavity of the annular venting sleeve 21, forcibly cooling the gas storage arc cavity 9, the dry powder storage arc cavity 10, and the sidewalls of the metal collar frame 6. This prevents the flue gas generated at the power working terminal from overflowing through the heat dissipation path and maintains the sealing of the inner annular cavity during the depressurization process, avoiding the risk of air leakage. At the same time, the Hall magnetic chuck 24 adjusts the magnetic output according to the control signal, and attracts the metal collar frame 6 through the first magnetic chuck 26, causing the metal collar frame 6 to rotate, so that the directional pressure relief mechanism 7 is aligned with any magnetic vent 4. Since the heat dissipation airflow only acts on the outer cavity of the ring, the flue gas at the power working end is isolated by the metal collar frame 6 and cannot overflow. During pressure relief, the inner cavity of the ring remains closed, ensuring that there is no air leakage during the pressure relief process.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the interior of the metering box housing 1 is divided into an inner ring cavity and an outer ring cavity by a metal collar frame 6. The inner ring cavity is used to supply the operation of several power metering terminals and is not connected to the interior of the annular venting sleeve 21. The outer ring cavity is located between the circular gear disk 5 and the metal collar frame 6. Two symmetrical hinged bases 11 are fixedly connected to the surface of the metal collar frame 6. A ring drive detection unit 8 is hinged on each of the hinged bases 11. Gas storage arc cavity 9 and dry powder storage arc cavity 10 are fixedly installed on the outer edge of the metal collar frame 6 at the positions on both sides of the hinged base 11. The outer ring cavity is connected to the interior of the annular venting sleeve 21 to cool the gas storage arc cavity 9, the dry powder storage arc cavity 10, and the side wall of the metal collar frame 6.

[0030] The outer edge of the metal collar frame 6 is fixedly installed with a gas storage arc cavity 9 and a dry powder storage arc cavity 10 on both sides of the hinge base 11. These arc cavities are arc-shaped and fit the curve of the metal collar frame 6. The gas storage arc cavity 9 is used to store extinguishing gas, such as inert gas in the prior art, while the dry powder storage arc cavity 10 is used to store dry powder extinguishing agent. They are connected to the interior of the annular venting sleeve 21 through the outer cavity of the ring, so that the heat dissipation airflow can directly cool these storage arc cavities and prevent them from failing due to high temperature.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the ring drive detection unit 8 includes an outer flip-up sleeve frame 81. The outer flip-up sleeve frame 81 extends towards the center end of the metal collar frame 6, and a soft rubber arc plate 814 is fixedly installed on the end face of the extended end. A bearing collar 85 is fixedly installed inside the outer flip-up sleeve frame 81 on the side near the hinge base 11. An elastic sleeve 86 is fixedly installed on the bearing collar 85, which is embedded inside the outer flip-up sleeve frame 81. An embedded rod 87 is assembled inside the elastic sleeve 86. The embedded rod 87 has an outward extension tendency under the elastic performance of the elastic sleeve 86, and the extended end passes through the end of the outer flip-up sleeve frame 81 near the hinge base 11. A bevel gear sleeve head 88 is fixedly installed on the extended end. The bevel gear sleeve head 88 meshes with the circular gear disk 5 in the extended state.

[0032] The outer flip-up sleeve frame 81 serves as the main frame of the ring drive detection unit 8. Its elongated frame structure extends towards the center of the metal collar frame 6, facing the working area of ​​the energy metering end. This center-extending design ensures the detection range covers the central area of ​​the ring cavity, avoiding detection blind spots. Soft rubber arc plates 814 are fixedly installed on the extended end faces of the outer flip-up sleeve frame 81. These arc-shaped soft rubber plates act as buffers and protect the outer flip-up sleeve frames 81 on both sides when they are close together. A bearing collar 85 is fixedly installed inside the outer flip-up sleeve frame 81 on the side near the hinge base 11. The bearing collar 85 is a ring bearing structure, with an elastic sleeve 86 fixedly connected to its inner ring. The elastic sleeve 86 is entirely embedded inside the outer flip-up sleeve frame 81, and is a cylindrical reset structure with an embedded elastic element. It is made of spring steel and can extend under pressure. The elastic sleeve 86 has an embedded rod 87 inside. The embedded rod 87 is a rod-shaped structure with limit buckles on both sides. Under the elasticity of the elastic sleeve 86, it extends outward as a whole, allowing the embedded rod 87 to retract in the non-working state to avoid interference, and to extend when working. The extended end of the embedded rod 87 passes through one end of the outer flip-up sleeve frame 81 near the hinge base 11. A bevel gear sleeve head 88 is fixedly installed on the extended end. The bevel gear sleeve head 88 is shaped like a bevel gear structure, and its tooth profile matches the tooth groove of the annular gear disk 5. In the extended state, it meshes with the annular gear disk 5. The annular gear disk 5 is also a beveled annular toothed sleeve structure, so that when the metal collar frame 6 rotates, the bevel gear sleeve head 88 can drive the ring drive detection unit 8 to move as a whole through gear transmission, realizing the back-and-forth movement of the detection point. The ring drive detection unit 8 is connected to the metal collar frame 6 via the hinged base 11. Under normal conditions, it is attached to the inner wall of the outward-folding viewing door 12 via the magnetic suction plate 813 to maintain the detection position. When maintenance or inspection is required, the outward-folding viewing door 12 is opened, and the ring drive detection unit 8 flips outward synchronously with the door. At this time, the outward-folding sleeve frame 81 flips outward synchronously. During the flipping process, the embedded rod 87 inside the elastic sleeve 86 is squeezed and contracted along the inclined surface of the circular gear disk 5, so that the meshing end of the bevel gear sleeve head 88 is temporarily disengaged from the circular gear disk 5. Specifically, the elastic performance inside the elastic sleeve 86 achieves temporary relocation during the outward flipping process.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the ring drive detection unit 8 also includes a bidirectional threaded rod 89 fixedly installed on the side of the elastic sleeve 86 away from the bearing ring 85. A nut sleeve block 810 is engaged on the bidirectional threaded rod 89 and slidably sleeved in the inner cavity of the outer flip frame 81. A detection module 811 is fixedly installed at the bottom axial position of the nut sleeve block 810, and spray heads 812 are fixedly installed on both sides of the detection module 811. The detection end of the detection module 811 is vertically oriented towards the power metering end, and the spray ends of the spray heads 812 are obliquely aligned with the vertical detection end of the detection module 811. Magnetic suction plates 813 are fixedly installed on both sides of the upper surface of the outer flip frame 81, and are attracted to the inner wall of the outer flip viewing door 12 through the magnetic suction plates 813. Soft rubber arc plates 814 are fixedly installed on the side ends of the outer flip frame 81.

[0034] The configured bidirectional threaded rod 89 is a rod-shaped structure with symmetrical threads in both left and right directions. Its fixed end is connected to the end of the elastic sleeve 86, so that when the elastic sleeve 86 rotates due to the rotation of the outer flip-up sleeve frame 81, the bidirectional threaded rod 89 can transmit power synchronously. A nut sleeve block 810 is engaged and installed on the bidirectional threaded rod 89 and slides in the cavity of the outer flip-up sleeve frame 81. The nut sleeve block 810 is a block-shaped sliding component with a threaded hole inside that matches the thread of the bidirectional threaded rod 89, allowing it to slide back and forth along the rod axis when the bidirectional threaded rod 89 rotates. A detection module 811 is fixedly installed at the bottom axial position of the nut sleeve block 810. The detection module 811 is a temperature and smoke sensor in the prior art, and its detection end is vertically oriented towards the power metering end to ensure direct monitoring of the working area. Spray heads 812 are fixedly installed on both sides of the detection module 811. The spray heads 812 are nozzle-shaped, and their spray ends are all angled towards the vertical detection end of the detection module 811. The angled design allows the extinguishing medium to cover the detection area while avoiding obstruction of the detection path. When the external magnetic drive cooling unit 2 and the magnetic drive metal collar frame 6 rotate, the extended bevel gear sleeve 88 will rotate synchronously along the circular gear disk 5. During the rotation, one end of the elastic sleeve 86 at one end of the bevel gear sleeve 88 will rotate to control the rotation of the bidirectional threaded rod 89 at the side end of the elastic sleeve 86. The rotation of the bidirectional threaded rod 89 drives the nut sleeve block 810 to move back and forth along the thread direction, so that the detection module 811 and the spray sleeve 812 slide in the cavity of the outward flip frame 81. Since the outward flip frames 81 on both sides will form a crossbeam structure on the top of the detection end when the outward flip viewing door 12 is closed, it is equivalent to forming a detection diameter of the detection end area. By reciprocating, the detection module 811 is allowed to scan the temperature or smoke changes at different positions on the detection diameter, so as to achieve all-round coverage monitoring of the power metering end. When the detection module 811 detects an anomaly, the system will trigger a feedback signal. Once the stable threshold is exceeded, the system can control the spray head 812 to receive the extinguishing medium from the gas storage arc chamber 9 or the dry powder storage arc chamber 10 through the traction hose 84 for directional spraying.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the ring drive detection unit 8 also includes an L-shaped connecting conduit 82 fixedly installed on the side output end of the gas storage arc cavity 9 and the dry powder storage arc cavity 10. The L-shaped connecting conduit 82 is a rigid cavity structure and is respectively connected to both sides of the hinge base 11. Elastic winding modules 83 are fixedly installed on both sides of the outer flip frame 81 near the hinge base 11. Traction hoses 84 are wound on the elastic winding modules 83, and the traction hoses 84 on both sides are respectively connected to the spray head 812, and both pass through the inner cavity of the L-shaped connecting conduit 82 from the hinge end on the corresponding side to connect the gas storage arc cavity 9 and the dry powder storage arc cavity 10 respectively.

[0036] The L-shaped connecting conduit 82 is a rigid cavity structure, shaped like an L-shaped rounded bend, connected to both sides of the hinge base 11, forming a fixed transport path from the storage arc cavity to the ring drive detection unit 8. It is made entirely of metal to ensure structural stability under high temperature and pressure. The elastic winding module 83 uses a spring-wound conduit device for protecting hoses, with a traction hose 84 wound around it. The traction hose 84 is made of a high-temperature and corrosion-resistant flexible composite material, with an independent cavity for the extinguishing medium. The traction hoses 84 on both sides are connected to the spray nozzle 812, and both enter the cavity of the L-shaped connecting conduit 82 from the hinge end on the corresponding side, connecting to the gas storage arc cavity 9 and the dry powder storage arc cavity 10 respectively. When the nut sleeve 810 moves back and forth, the elastic winding module 83 automatically releases or retracts the traction hose 84 through its internal spring force, ensuring the hose is always taut but not damaged.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the directional pressure relief mechanism 7 includes an arc-shaped expanding mask 71 fixedly installed on the side of the metal collar frame 6. A protective mesh cover 72 is assembled on the side of the arc-shaped expanding mask 71 facing the center of the metal collar frame 6. The arc-shaped expanding mask 71 is a cavity structure with an open arc-shaped opening. Several slotted flow-deflecting arc plates 73 are fixedly connected to one side of the arc-shaped opening. Each slotted flow-deflecting arc plate 73 is arranged along the arc of the arc-shaped expanding mask 71. Several parallel slit quenching guide plates 74 are assembled on the slotted flow-deflecting arc plate 73. A flow stabilizing unit 75 is configured at the end of the arc-shaped expanding mask 71 away from the protective mesh cover 72.

[0038] The directional pressure relief mechanism 7 is a component used for pressure relief. It achieves directional guidance and quenching of high-temperature flue gas through a multi-layer structure. The arc-shaped diffuser 71 has an open arc-shaped cavity structure with the arc surface facing the center of the metal collar frame 6, forming an flared adsorption channel. A protective mesh cover 72 is assembled on the side of the arc-shaped diffuser 71 facing the center. The protective mesh cover 72 is made of high-temperature resistant metal mesh with a mesh size smaller than the diameter of typical electric arc particles. It is used to initially block open flame splashes or large foreign objects from escaping, while allowing gas and heat to pass through. Each slotted baffle plate 73 is arranged along the arc-shaped contour of the arc-shaped diffuser 71. Its plate body is a streamlined arc surface with geometrically shaped slots, similar to the baffle plate structure used in existing turbulence control technologies. When high-pressure flames and flue gas pass through, the slots cut the fluid, generating controllable vortices. This reduces the kinetic energy of the main stream, dispersing the high-speed jet into multiple low-speed flows and weakening the shock wave intensity. It also increases the contact area and residence time between the fluid and the plate surface, improving subsequent cooling efficiency. The slit quenching guide plate 74 is a thin sheet structure with a series of closely arranged slits on its surface. The slits are smaller than the flame quenching distance, depending on the properties of the combustible medium. For example, for common hydrocarbon gases, the slit width can be designed to be less than 2 mm. When the flame front propagates to the slit, the metal wall of the slit will quickly absorb heat, causing the temperature of the flame area to drop sharply below the ignition point. At the same time, the slit will have a throttling effect on the fluid, further inhibiting the flame propagation. The flatly arranged guide plates will divide the flame into multiple tiny streams, greatly increasing the quenching surface area and ensuring that the flame is completely extinguished when it passes through the plate array.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the flow stabilizing unit 75 includes a heat-resistant frame 751. A detachable embedded cylindrical cover 752 is inserted and installed inside the heat-resistant frame 751. A second servo motor 753 is fixedly installed at the center of the detachable embedded cylindrical cover 752. An adsorption fan 754 is fixedly installed on the output end of the second servo motor 753. Each blade of the adsorption fan 754 is equipped with a magnetic coating 755. The end of the detachable embedded cylindrical cover 752 facing the protective mesh cover 72 is open. An external storage ring cylinder 756 is inserted and installed on the open end. The end face of the external storage ring cylinder 756 is a breathable cover 757 for the adsorption fan 754 to operate.

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the flow stabilizing unit 75 also includes a second magnetic ring 758 adsorbed inside the external storage annular cylinder 756. The second magnetic ring 758 is adsorbed and corresponds to the magnetic coating 755 configured on each fan blade through the vent cover 757. Several circumferentially arranged stirring rods 759 are fixedly connected to the side of the second magnetic ring 758 facing the inside of the external storage annular cylinder 756. A ventilation cover 7510 is configured on the opening end of the external storage annular cylinder 756 facing the protective mesh cover 72.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the flow stabilizing unit 75 also includes a magnetic docking sleeve 7511 fixedly connected to the end of the heat-resistant frame 751 away from the detachable embedded cylindrical cover 752. The magnetic docking sleeve 7511 houses an adsorption heat-resistant ring 7513. An infrared docking probe 7512 is fixedly installed on the rotating shaft end of the adsorption fan 754. The center of the adsorption heat-resistant ring 7513 is provided with a circular opening for the infrared light emitted from the detection end of the infrared docking probe 7512. The infrared light emitted from the detection end of the infrared docking probe 7512 docks with the magnetic ventilation cover 4. A pressure relief cover 3 corresponding to each magnetic ventilation cover 4 is arranged on the outer side of the metering box shell 1.

[0042] The configured flow stabilization unit 75 is a component of the external discharge pressure relief end of the directional pressure relief mechanism 7. It controls the final stage of stable flow of the high-temperature flue gas discharged through the arc-shaped diffuser 71 to ensure the stability of the finally discharged gas. The heat-resistant sleeve 751 is fixed to the far end of the arc-shaped diffuser 71 as the mounting base. A detachable embedded cylindrical cover 752 is inserted and installed inside it. The output shaft of the second servo motor 753 inside drives the adsorption fan 754 to rotate. Each blade of the fan is equipped with a magnetic coating 755. The end of the detachable embedded cylindrical cover 752 facing the protective mesh cover 72 is open, and the fan is inserted into this open end. An external storage annular cylinder 756 is installed, with a vent 757 at one end for airflow generated by the adsorption fan 754. A second magnetic ring 758 is adsorbed inside the external storage annular cylinder 756. The second magnetic ring 758 forms a magnetic coupling with the magnetic coating 755 on the blades of the adsorption fan 754 through the vent 757, forming a non-contact magnetic transmission chain. An infrared docking probe 7512 is installed at the rotating shaft end of the adsorption fan 754. The infrared light emitted by the probe passes through the circular opening at the center of the adsorption heat-resistant ring 7513, and is used to accurately locate and dock with the target magnetic vent 4 in the initial stage of depressurization.

[0043] When a deflagration occurs inside the chamber, the high-temperature flue gas is turbulent and slowed down by the slotted baffle plate 73 of the arc-shaped diffuser 71, and quenched by the slit quenching guide plate 74. It then enters the working area of ​​the flow stabilization unit 75. At this time, the second servo motor 753 starts, driving the adsorption fan 754 to rotate. Through the magnetic coupling between the magnetic coating 755 and the second magnetic ring 758, the second magnetic ring 758 and its connected stirring rod 759 slowly rotate within the external storage annular cylinder 756. The annular cylinder is pre-filled with composite adsorption material particles, such as porous activated carbon used as a matrix for the physical adsorption of organic gases in existing technologies, mixed with alkaline compounds to neutralize acidic gases. The continuous rotation of the stirring rod 759 effectively agitates the adsorbent bed, preventing caking and ensuring sufficient contact between the flue gas and the adsorbent, thereby efficiently removing toxic and harmful components. The purified gas, guided by the adsorption fan 754, is finally discharged directionally through the adsorption burn-resistant ring 7513. At the same time, the infrared light emitted by the infrared docking probe 7512 passes through the central hole of the adsorption and heat-resistant ring 7513, guides and confirms alignment with the magnetic vent 4 on the target pressure relief path.

[0044] The usage method provided by this invention is as follows: In use, under normal operating conditions of the energy metering box, the ring-driven detection unit 8 continuously monitors several energy metering terminals within the box in real time. The ring-driven detection unit 8 is symmetrically hinged to the surface of the metal collar frame 6 via a hinged base 11. Two sets of outward-flipping sleeve frames 81 are mounted on top of the energy metering terminals, forming a detection diameter covering the top of the several energy metering terminals. The detection end of the detection module 811 faces vertically towards the energy metering terminals. Through the meshing transmission between the bidirectional threaded rod 89 and the nut sleeve block 810, the detection module 811 reciprocates along the inner cavity of the outward-flipping sleeve frame 81, thereby scanning temperature or smoke changes at different locations. When the outward-flipping viewing door 12 is closed, the magnetic suction plate 813 adheres to the inner wall of the door, maintaining the ring-driven detection unit 8 in a stable detection posture.

[0045] When maintenance is required, the outward-opening viewing door 12 opens, and the ring drive detection unit 8 opens outward synchronously with the door. At this time, the embedded rod 87 in the elastic sleeve 86 retracts during the hinged rotation, causing the bevel gear sleeve head 88 to temporarily disengage from the ring gear disk 5, thus avoiding interference with maintenance operations.

[0046] At this time, the first servo motor 22 drives the annular cooling fan sleeve 23 at the output end to rotate. During the rotation of the annular cooling fan sleeve 23, the first magnetic ring 26 controlled by the Hall magnetic chuck 24 generates magnetic attraction force to attract the metal collar frame 6 through the rear side wall of the metering box shell 1. The rotation of the annular cooling fan sleeve 23 drives the metal collar frame 6 to rotate, thereby controlling the overall synchronous rotation of the ring drive detection unit 8. At the same time, it also cooperates with the bevel gear sleeve head 88 meshed with the annular gear disk 5 to drive the bidirectional threaded rod 89 and the nut sleeve block 810 to reciprocate, and at the same time, it provides heat dissipation to the outer cavity of the ring.

[0047] Then, when the detection module 811 detects a local temperature anomaly or smoke signal, the system immediately stops the operation of the first servo motor 22, so that the detection module 811 is temporarily stopped at the top of the abnormal end to locate the abnormal point. At this time, the two spray heads 812 are connected to the gas storage arc chamber 9 and the dry powder storage arc chamber 10 through the traction hose 84 from the L-shaped connecting pipe 82, and spray the extinguishing medium obliquely to cover the abnormal end, so as to realize the simultaneous detection and initial fire extinguishing.

[0048] Then, inside the enclosure, if smoke is generated as the extinguishing agent covers and extinguishes the fire, or if the fire spreads, the directional pressure relief mechanism 7 initiates a directional pressure relief procedure. The metal collar frame 6 rotates a second time under the renewed drive of the external magnetic drive cooling unit 2. Based on the location of the abnormal end recorded by the system in the first instance, and the pre-determined installation location of the metering box outer shell 1, the direction in which pressure can be relieved on the outside of the metering box outer shell 1 is determined. For example, if pressure can only be relieved at the very top and bottom of the metering box outer shell 1, the direction in which pressure can be relieved is determined based on the location of the abnormal end recorded by the system in the first instance. The distances from the top and bottom of the metering box housing 1 are determined to calculate the shortest path, ensuring that the pressure relief path causes minimal damage to internal components. The arc-shaped expansion mask 71 is rotated to align with the side of the pressure relief cover 3 in the corresponding direction, i.e., the infrared docking probe 7512 is aligned with the magnetic ventilation cover 4 on that side. High-temperature flue gas enters the cavity of the arc-shaped expansion mask 71 through the protective mesh cover 72. The slotted turbulence arc plate 73 cuts the fluid to generate eddies, reducing the impact wave energy. Subsequently, the slit quenching guide plate 74 extinguishes the open flame through the metal slit quenching effect. Simultaneously, the second servo motor 753 of the flow stabilizing unit 75 starts, driving the adsorption fan 754 to rotate. Through the magnetic coupling between the magnetic coating 755 and the second magnetic ring 758, the stirring rod 759 rotates, stirring the adsorbent particles in the external storage ring cylinder 756, purifying the harmful components in the flue gas. The purified gas is discharged through one side of the adsorption heat-resistant ring 7513 under the guidance of the adsorption fan 754. Since the infrared docking probe 7512 emits infrared light through the round opening of the adsorption heat-resistant ring 7513, the pressure relief path has been pre-calibrated and the alignment with the magnetic ventilation hood 4 has been completed, so that the pressure relief direction is towards the safe side.

[0049] Finally, once the system confirms that the fire is under control and the smoke has been completely discharged, the internal ring drive detection unit 8 can also enter the reset phase. The external magnetic drive heat dissipation unit 2 controls the metal collar frame 6 to rotate back to its initial position, and the directional pressure relief mechanism 7 disengages from the magnetic vent hood 4. The detection module 811 of the ring drive detection unit 8 scans the environment inside the box again. After confirming that there are no abnormalities, the sprinkler head 812 shuts off the supply of extinguishing medium. The adsorption fan 754 of the flow stabilization unit 75 stops rotating, the stirring rod 759 stops stirring, and the adsorbent in the external storage ring cylinder 756 is left to stand still for use.

[0050] After depressurization, when maintenance personnel need to perform status checks, the outward-folding visual door 12 can be opened, and the ring drive detection unit 8 can be folded outward with the door for easy maintenance, realizing full-process management of fire risk of the power metering box.

[0051] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A directional pressure relief fireproof and explosion-proof power metering box, comprising a metering box outer shell (1), characterized in that: The metering box housing (1) is fixedly installed with a circular gear disk (5), and four sets of magnetic ventilation covers (4) for docking with the midpoint of the four sides of the metering box housing (1) are fixedly installed on the outer edge of the circular gear disk (5). A metal collar frame (6) that can rotate 360 ​​degrees is movably installed on the inner side of the circular gear disk (5). A directional pressure relief mechanism (7) is configured on the metal collar frame (6), and several power metering terminals are assembled on the inner side of the metal collar frame (6). Two sets of symmetrically arranged ring drive detection units (8) are hinged on the metal collar frame (6), and the two sets of symmetrically arranged ring drive detection units (8) are mounted on the top of several energy metering terminals. The outer surface of the metering box housing (1) is hinged with an outward-folding viewing door (12), and each set of ring drive detection units (8) can be attached to the inside of the outward-folding viewing door (12) to perform synchronous outward-folding without interfering with the maintenance of the energy metering terminals. The back of the metering box housing (1) is provided with an external magnetic drive heat dissipation unit (2). The magnetic drive end of the external magnetic drive heat dissipation unit (2) is attached to the metal collar frame (6) through the metering box housing (1) to drive the directional pressure relief mechanism (7) to connect to the magnetic venting cover (4) on either side for directional pressure relief.

2. The directional pressure relief fireproof and explosion-proof power metering box according to claim 1, characterized in that, The external magnetic drive heat dissipation unit (2) includes an annular venting sleeve (21). A first servo motor (22) is fixedly installed at the center of the annular venting sleeve (21). An annular cooling fan sleeve (23) is fixedly installed on the output end of the first servo motor (22). A Hall magnetic chuck (24) is fixedly installed at the center of the annular cooling fan sleeve (23). An external expansion ring frame (25) is fixedly connected to the side of the Hall magnetic chuck (24). The external expansion ring frame (25) is attached to the side wall of the metering box housing (1). A first magnetic ring (26) connected to the output end of the Hall magnetic chuck (24) is fixedly installed at the outer edge of the external expansion ring frame (25). One end of the metal ring frame (6) attached to the side wall of the metering box housing (1) is magnetically attracted to the first magnetic ring (26).

3. The directional pressure relief fireproof and explosion-proof power metering box according to claim 2, characterized in that, The interior of the metering box housing (1) is divided into an inner ring cavity and an outer ring cavity by a metal collar frame (6). The inner ring cavity is used for the operation of several power metering terminals and is not connected to the interior of the annular venting sleeve (21). The outer ring cavity is located between the circular gear disk (5) and the metal collar frame (6). Two symmetrical hinge bases (11) are fixedly connected to the surface of the metal collar frame (6). A ring drive detection unit (8) is hinged on each of the hinge bases (11). Gas storage arc cavity (9) and dry powder storage arc cavity (10) are fixedly installed on the outer edge of the metal collar frame (6) at the positions on both sides of the hinge base (11). The outer ring cavity is connected to the interior of the annular venting sleeve (21) to cool the gas storage arc cavity (9), the dry powder storage arc cavity (10) and the side wall of the metal collar frame (6).

4. A directional pressure relief fireproof and explosion-proof power metering box according to claim 3, characterized in that, The ring drive detection unit (8) includes an outer flip frame (81), which extends as a whole toward the center end of the metal collar frame (6), and a soft rubber arc plate (814) is fixedly installed on the end face of the extended end. A bearing collar (85) is fixedly installed on the side of the outer flip frame (81) near the hinge base (11). An elastic sleeve (86) is fixedly installed on the bearing collar (85) and is embedded in the outer flip frame (81). An embedded rod (87) is assembled inside the elastic sleeve (86). The embedded rod (87) has an outward movement tendency under the elastic performance of the elastic sleeve (86), and the extended end passes through the end of the outer flip frame (81) near the hinge base (11). A bevel gear sleeve (88) is fixedly installed on the extended end. The bevel gear sleeve (88) meshes with the ring gear disk (5) in the extended state.

5. A directional pressure relief fireproof and explosion-proof power metering box according to claim 4, characterized in that, The ring drive detection unit (8) also includes a bidirectional threaded rod (89) fixedly installed on the side of the elastic sleeve (86) away from the bearing ring (85). A nut sleeve block (810) is engaged on the bidirectional threaded rod (89) and slidably sleeved in the cavity of the outer flip frame (81). A detection module (811) is fixedly installed at the bottom axis position of the nut sleeve block (810), and spray heads (812) are fixedly installed on both sides of the detection module (811). The detection end of the detection module (811) is vertically oriented towards the power metering end, and the spray ends of the spray heads (812) are obliquely aligned with the vertical detection end of the detection module (811). Magnetic plates (813) are fixedly installed on both sides of the upper surface of the outer flip frame (81), and are attracted to the inner wall of the outer flip viewing door (12) through the magnetic plates (813). Soft rubber arc plates (814) are fixedly installed on the side ends of the outer flip frame (81).

6. A directional pressure relief fireproof and explosion-proof power metering box according to claim 5, characterized in that, The ring drive detection unit (8) also includes an L-shaped connecting conduit (82) fixedly installed on the side output end of the gas storage arc cavity (9) and the dry powder storage arc cavity (10). The L-shaped connecting conduit (82) is a rigid cavity structure and is connected to both sides of the hinge base (11). The outer flip frame (81) is fixedly installed on both sides near the hinge base (11). The elastic winding module (83) is wound with a traction hose (84) on each elastic winding module (83). The traction hoses (84) on both sides are connected to the spray head (812) respectively, and both are inserted into the cavity of the L-shaped connecting conduit (82) from the hinge end on the corresponding side to connect the gas storage arc cavity (9) and the dry powder storage arc cavity (10) respectively.

7. A directional pressure relief fireproof and explosion-proof power metering box according to claim 6, characterized in that, The directional pressure relief mechanism (7) includes an arc-shaped expanding mask (71) fixedly installed on the side of the metal collar frame (6). A protective net cover (72) is assembled on the side of the arc-shaped expanding mask (71) facing the center of the metal collar frame (6). The arc-shaped expanding mask (71) is a cavity structure with an open arc-shaped opening. Several slotted baffles (73) are fixedly connected on one side of the arc-shaped opening. Each slotted baffle (73) is arranged along the arc of the arc-shaped expanding mask (71). Several parallel slit quenching guide plates (74) are assembled on the slotted baffles (73). A flow stabilizing unit (75) is configured at the end of the arc-shaped expanding mask (71) away from the protective net cover (72).

8. A directional pressure relief fireproof and explosion-proof power metering box according to claim 7, characterized in that, The flow stabilizing unit (75) includes a heat-resistant frame (751), a detachable embedded cylindrical cover (752) is inserted and installed inside the heat-resistant frame (751), a second servo motor (753) is fixedly installed at the center of the detachable embedded cylindrical cover (752), an adsorption fan (754) is fixedly installed on the output end of the second servo motor (753), and each blade of the adsorption fan (754) is equipped with a magnetic coating (755). The end of the detachable embedded cylindrical cover (752) facing the protective mesh cover (72) is open, and an external storage ring cylinder (756) is inserted and installed on the open end. The end face of the external storage ring cylinder (756) is a breathable cover (757) for the adsorption fan (754) to function.

9. A directional pressure relief fireproof and explosion-proof power metering box according to claim 8, characterized in that, The flow stabilizing unit (75) also includes a second magnetic ring (758) adsorbed inside the external storage annular cylinder (756). The second magnetic ring (758) is adsorbed and corresponds to the magnetic coating (755) configured on each fan blade through the vent cover (757). A number of circumferentially arranged stirring rods (759) are fixedly connected to the side of the second magnetic ring (758) facing the inside of the external storage annular cylinder (756). A ventilation cover (7510) is configured on the opening end of the external storage annular cylinder (756) facing the protective mesh cover (72).

10. A directional pressure relief fireproof and explosion-proof power metering box according to claim 9, characterized in that, The flow stabilizing unit (75) also includes a magnetic docking sleeve (7511) fixedly connected to the end of the heat-resistant sleeve frame (751) away from the detachable embedded cylindrical cover (752). The magnetic docking sleeve (7511) contains an adsorption heat-resistant ring (7513). An infrared docking probe (7512) is fixedly installed on the rotating shaft end of the adsorption fan (754). The center of the adsorption heat-resistant ring (7513) is provided with a circular opening for the infrared light emitted from the detection end of the infrared docking probe (7512). The infrared light emitted from the detection end of the infrared docking probe (7512) docks with the magnetic ventilation cover (4). A pressure relief cover (3) corresponding to each magnetic ventilation cover (4) is arranged on the outer side of the metering box shell (1).

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