A safe fireproof electric energy metering box used in a dry environment

Abstract

This invention relates to the field of electricity metering box technology, and more particularly to a safe and fireproof electricity metering box for use in dry environments. It includes an outer casing with a rotatable cover on the front right side. Air inlets are spaced apart on both the left and right side walls of the outer casing. Filters are installed at the air inlets on both the left and right side walls inside the outer casing. Fans are installed on both the left and right sides of the inner side wall of the outer casing. Drying protection isolation components are installed on both sides of the outer casing. A fire extinguishing component is installed on the top of the outer casing to prevent fires. This invention significantly improves the active fire prevention capability in dry environments through the synergistic effect of the isolation components and the fire extinguishing component. When a temperature sensor detects an abnormally high temperature, an electric actuator opens a pressure relief valve, and the piston rod retracts, causing a baffle to quickly fall and close the rectangular hole, instantly cutting off the external oxygen supply and forming an independent asphyxiation isolation chamber, effectively curbing the risk of rapid flame spread in dry air.

Description

Technical Field

[0001] This invention relates to the field of electrical energy metering box technology, and in particular to a safe and fireproof electrical energy metering box for use in dry environments. Background Technology

[0002] In industrial and civil power systems, electricity metering boxes, as key equipment for electricity metering and distribution, are widely used in substations, communication base stations, industrial and mining enterprises, and outdoor power distribution sites. Especially in arid regions of Northwest China, desert peripheries, plateau areas, or dry indoor environments, metering boxes operate under conditions of low humidity, high dust, and large temperature differences for extended periods. Traditional electricity metering boxes typically focus on moisture-proof, dust-proof, and heat dissipation designs. While a dry environment reduces the risk of condensation short circuits, it significantly increases the risk of fire: dry air easily leads to static electricity buildup, and when electrical connections are loose, insulation is aging, or overloaded, localized high temperatures may ignite accumulated dust, cable insulation, or plastic components inside the box. In the event of a fire, traditional firefighting measures are often lacking or slow to respond, allowing flames to spread rapidly to surrounding equipment, causing power outages, data loss, and other problems.

[0003] Therefore, it is necessary to design a safe and fireproof power metering box for use in dry environments to solve the above problems. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a safe and fireproof power metering box for use in dry environments.

[0005] The technical solution is as follows: A safe and fireproof power metering box for use in dry environments includes an outer casing, a cover, a filter, a fan, an isolation component, a fire extinguishing component, a pull-out component, a mounting bracket, and a temperature sensor. The cover is rotatably mounted on the front right side of the outer casing. Air inlets are spaced apart on both the left and right side walls of the outer casing. Filters are installed at the air inlets on both the left and right side walls inside the outer casing. Fans are installed on the left side wall inside the outer casing. Isolation components with drying protection are installed on both the left and right sides inside the outer casing. A fire extinguishing component capable of preventing fires is installed on the top of the outer casing. A pull-out component capable of emergency activation of the fire extinguishing component is also installed on the top of the outer casing. The pull-out component is connected to the isolation component. A mounting bracket is installed on the rear wall inside the outer casing for mounting metering components such as power meters. A temperature sensor is installed on the fire extinguishing component. A controller is installed on the outside of the outer casing, and the controller is connected to the temperature sensor via wiring.

[0006] As an improvement to the above solution, the isolation assembly includes a partition, a vertical slide rail, a baffle, an isolation plate, a cylinder, a piston strut, a buffer block, an air pipe, a pressure relief valve, and an electric actuator. Two partitions are symmetrically arranged on both the left and right sides inside the outer casing. Vertical slide rails are symmetrically arranged between the two partitions, and a baffle is slidably installed between the vertical slide rails. Rectangular holes are opened on both partitions, and these holes are at the same horizontal level as the air inlet slot. An isolation plate is installed between the lower parts of the two partitions. A cylinder is embedded in the isolation plate, and a piston strut is movably installed inside the cylinder. A buffer block is installed on the top of the isolation plate. An air pipe is connected to the lower part of each cylinder, passing through one isolation plate and located inside the outer casing. A pressure relief valve is installed on each air pipe, and an electric actuator is installed on the pressure relief valve. The controller is connected to the electric actuator via wiring.

[0007] As an improvement to the above solution, the fire extinguishing assembly includes a straight slide rail, a straight slider, a guide rod, a fixing ring, a heptafluoropropane gas fire extinguisher, and a mounting plate. A straight slide rail is installed at the top of the outer casing, and a straight slider is slidably installed on the slide rail. A guide rod is symmetrically and vertically installed on the straight slider, and a fixing ring is symmetrically installed at the bottom of the guide rod. A mounting plate is installed on the top of the heptafluoropropane gas fire extinguisher. The mounting plate of the heptafluoropropane gas fire extinguisher has symmetrical arc-shaped slots with the centers of the slots coinciding with each other. One end of the arc-shaped slot is a central hole with a diameter larger than the outer diameter of the fixing ring. The heptafluoropropane gas fire extinguisher is installed by engaging the fixing ring of the guide rod through the arc-shaped slots of the mounting plate.

[0008] As an improvement to the above solution, the pull-out assembly includes a connecting frame, a crossbeam, a sliding pressure rod, a first elastic element, a round shaft, a sliding groove, a pressing plate, a fixing block, a second elastic element, and a pull rope. Connecting frames are provided on the top left and right sides of the outer casing, and crossbeams are provided at the bottom of the connecting frames. A sliding pressure rod is slidably arranged between the two crossbeams, and a first elastic element is provided between the two sliding pressure rods. Round shafts are provided at both ends of the sliding pressure rods. Sliding grooves are opened on the upper part of the side walls of the partitions on the left and right sides that are close to each other. A pressing plate is slidably arranged in the sliding groove. A trapezoidal inclined groove is opened on the upper part of the inner side of the pressing plate. The round shaft contacts and cooperates with the inclined surface of the adjacent trapezoidal inclined groove. When the pressing plate moves downward, it presses the round shaft to move in opposite directions. A fixing block is provided at the bottom of the sliding groove. A second elastic element is provided between the fixing block and the pressing plate. A pull rope is provided at the center of the bottom of the pressing plate. The pull rope passes through the fixing block and connects to the connecting block on the side wall of the baffle.

[0009] As an improvement to the above solution, a collection box is also included, with the collection box placed at the bottom inside the outer box.

[0010] As an improvement to the above solution, the partition is made of flame-retardant ABS engineering plastic and coated with a nano-level aluminum oxide antistatic coating.

[0011] As an improvement to the above solution, the baffle is a calcium silicate board, and an expanded graphite sealing strip is attached to the side of the baffle facing the rectangular hole.

[0012] As an improvement to the above solution, a rain cover is installed on the top of the outer box. The rain cover adopts an inclined design and the edge extends beyond the side wall of the outer box. The inner surface of the rain cover is covered with a heat-insulating rock wool layer.

[0013] Beneficial effects: 1. This invention significantly enhances proactive fire prevention capabilities in dry environments through the synergistic action of the isolation and extinguishing components. When the temperature sensor detects abnormally high temperatures, the electric actuator opens the pressure relief valve, and the piston rod retracts, causing the baffle to quickly fall and seal the rectangular hole, instantly cutting off the external oxygen supply and forming an independent asphyxiation isolation chamber, effectively curbing the risk of rapid flame spread in dry air. Simultaneously, the baffle's descent mechanically triggers the heptafluoropropane gas fire extinguisher via the pull-out component, eliminating the need for additional circuit control and avoiding the possibility of accidental activation or malfunction due to static electricity or aging wiring in dry environments, ensuring high reliability and timeliness of the extinguishing action.

[0014] 2. The fan continuously draws in dry air, which is then filtered to remove dust, ensuring the heat dissipation needs of electrical components while preventing insulation hazards caused by moisture inhalation. The flame-retardant ABS partition and calcium silicate board baffle in the isolation assembly, combined with expanded graphite sealing strips, further enhance structural stability and sealing tightness at high temperatures. The heptafluoropropane gas fire extinguisher employs a quick-installation structure with arc-shaped perforations and fixing rings, allowing for rapid replacement after extinguishing and flexible adjustment of the spray position via a straight sliding rail, ensuring precise coverage of the fire source by the extinguishing agent. The collection frame is used to absorb residual dust or extinguishing debris, maintaining cleanliness inside the chamber. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0017] Figure 3 This is an exploded structural diagram of the isolation component of the present invention.

[0018] Figure 4 This is a partial three-dimensional structural diagram of the isolation component of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the fire extinguishing component of the present invention.

[0020] Figure 6 This is a partial three-dimensional structural diagram of the fire extinguishing component of the present invention.

[0021] Figure 7 This is a schematic diagram of the first partial structure of the pull component of the present invention.

[0022] Figure 8This is a schematic diagram of the second partial structure of the pull component of the present invention.

[0023] The following are the labels in the diagram: 1. Outer casing, 2. Box cover, 3. Air inlet slot, 4. Filter screen, 5. Fan, 6. Isolation assembly, 61. Partition, 62. Vertical slide rail, 63. Baffle, 64. Rectangular hole, 65. Isolation plate, 66. Cylinder body, 67. Piston strut, 68. Buffer block, 69. Air pipe, 610. Pressure relief valve, 611. Electric actuator, 7. Fire extinguishing assembly, 71. Straight slide rail, 72. Straight slider. 73. Guide rod; 74. Fixing ring; 75. Heptafluoropropane gas fire extinguisher; 76. Mounting plate; 77. Arc-shaped slot; 8. Pull-out assembly; 81. Connecting frame; 82. Cross frame; 83. Sliding pressure rod; 84. First elastic element; 85. Round shaft; 86. Sliding groove; 87. Extrusion plate; 88. Fixing block; 89. Second elastic element; 810. Pull rope; 9. Mounting frame; 10. Temperature sensor; 11. Collection frame. Detailed Implementation

[0024] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0025] Example: Figures 1-6As shown, a safe and fireproof power metering box for use in dry environments includes an outer casing 1, a cover 2, a filter 4, a fan 5, an isolation assembly 6, a fire extinguishing assembly 7, a pull-out assembly 8, a mounting bracket 9, and a temperature sensor 10. The cover 2 is rotatably mounted on the front right side of the outer casing 1. A rain cover is mounted on the top of the outer casing 1, with an inclined design and edges extending beyond the side walls of the outer casing 1. The inner surface of the rain cover is covered with a layer of heat-insulating rock wool. Air inlets 3 are spaced apart on both the left and right side walls of the outer casing 1, and rain covers are installed on the outer sides of the air inlets 3 to prevent rainwater from seeping in. The air inlets on the inner left and right side walls of the outer casing 1... The filter screen 4 is detachable at all three positions for easy cleaning and replacement. Fans 5 are installed on the left side wall inside the outer casing 1. Drying and protective isolation components 6 are installed on both the left and right sides inside the outer casing 1. The isolation components 6 include partitions 61, vertical slide rails 62, baffles 63, isolation plates 65, cylinders 66, piston rods 67, buffer blocks 68, air pipes 69, pressure relief valves 610, and electric actuators 611. Two partitions 61 are symmetrically arranged on both the left and right sides inside the outer casing 1. The partitions 61 are made of flame-retardant ABS engineering plastic and coated with a nano-grade aluminum oxide antistatic coating.Baffle 63 is made of calcium silicate board, and an expanded graphite sealing strip is affixed to the side of baffle 63 facing the rectangular hole 64. Vertical slide rails 62 are symmetrically arranged between the two partitions 61, and baffle 63 is slidably arranged between the vertical slide rails 62. Rectangular holes 64 are opened on both partitions 61, and the rectangular holes 64 are at the same horizontal position as the air intake groove 3. An isolation plate 65 is arranged between the lower parts of the two partitions 61. A cylinder 66 is embedded in the isolation plate 65, and a piston rod 67 is movably arranged in the cylinder 66. A buffer block 68 is installed at the top, and air pipes 69 are connected to the lower part of the cylinder body 66. The air pipes 69 pass through an isolation plate 65 and are located inside the outer casing 1. Each air pipe 69 is equipped with a pressure relief valve 610, and an electric actuator 611 is installed on the pressure relief valve 610. The controller is connected to the electric actuator 611 through a circuit. A fire extinguishing assembly 7 capable of preventing fires is installed at the top of the outer casing 1. The fire extinguishing assembly 7 includes a straight slide rail 71, a straight slide block 72, a guide rod 73, a fixing ring 74, a heptafluoropropane gas fire extinguisher 75, and a mounting plate 76. The top of the device 75 is equipped with a straight slide rail 71, on which a straight slider 72 is slidably mounted. Guide rods 73 are symmetrically and vertically mounted on the straight sliders 72. Fixing rings 74 are symmetrically mounted at the bottom of the guide rods 73. The top of the heptafluoropropane gas fire extinguisher 75 is equipped with a mounting plate 76. The mounting plate 76 of the heptafluoropropane gas fire extinguisher 75 has symmetrically opened arc-shaped slots 77. The centers of the arc-shaped slots 77 coincide, and one end of each arc-shaped slot 77 is a central hole with a diameter larger than the outer diameter of the fixing ring 74. The heptafluoropropane gas fire extinguisher 75 is connected via a mounting plate 76. The arc-shaped slot 77 of the mounting plate 76 is installed in conjunction with the fixing ring 74 of the guide rod 73. The top of the outer box 1 is provided with a pull-out assembly 8 that can be used to open the fire extinguishing assembly 7 in an emergency. The pull-out assembly 8 is connected to the isolation assembly 6. The inner rear wall of the outer box 1 is provided with a mounting bracket 9, which is used to install metering components such as electricity meters. The fire extinguishing assembly 7 is provided with a temperature sensor 10. A controller is installed on the outside of the outer box 1. The controller is connected to the temperature sensor 10 through a line. It also includes a collection frame 11. The collection frame 11 is placed at the bottom inside the outer box 1.

[0026] like Figure 1 , Figure 7 and Figure 8As shown, the pull assembly 8 includes a connecting frame 81, a crossbeam 82, a sliding pressure rod 83, a first elastic element 84, a round shaft 85, a sliding groove 86, a pressing plate 87, a fixing block 88, a second elastic element 89, and a pull rope 810. Connecting frames 81 are provided on both the top left and right sides of the outer casing 1, and crossbeams 82 are provided at the bottom of each connecting frame 81. A sliding pressure rod 83 is slidably arranged between two crossbeams 82, and a first elastic element 84 is arranged between two sliding pressure rods 83. Round shafts 85 are provided at both ends of the sliding pressure rod 83, and partitions are located close to each other on the left and right sides. Each of the 61 sides has a sliding groove 86 on its upper sidewall. A pressing plate 87 is slidably installed in the sliding groove 86. A trapezoidal inclined groove is opened on the upper inner side of the pressing plate 87. A round shaft 85 contacts and engages with the inclined surface of the adjacent trapezoidal inclined groove. The pressing plate 87 moves downward to press the round shaft 85 to move in the opposite direction. A fixing block 88 is provided at the bottom of each sliding groove 86. A second elastic element 89 is provided between the fixing block 88 and the pressing plate 87. A pull rope 810 is provided at the bottom center of the pressing plate 87. The pull rope 810 passes through the fixing block 88 and connects to the connecting block on the sidewall of the baffle 63.

[0027] When the equipment operates normally in a dry environment, the fans 5 on the left and right side walls of the outer casing 1 start, drawing in outside air through the air intake slot 3. After being filtered by the filter screen 4, the air enters the interior of the casing through the rectangular holes 64 on the partition 61, circulating and dissipating heat for the electrical components on the mounting bracket 9. Since the environment is inherently dry, no additional dehumidification is required; the airflow circulation primarily ensures that the components operate within the allowable temperature range. The temperature sensor 10, installed on the fire extinguishing assembly 7, monitors the temperature inside the casing in real time. When the temperature abnormally rises to a set danger threshold, the temperature sensor 10 outputs a signal to the externally connected controller. The controller then controls the electric actuator 611 to operate, thereby opening the pressure relief valve 610. The pressure inside the cylinder 66 drops rapidly, and the piston rod 67 retracts under external air pressure, releasing the support of the baffle 63. Under the influence of gravity, the baffle 63 falls rapidly along the vertical slide rail 62, sealing the rectangular holes 64 on the partition 61, cutting off the air passage between the air intake slot 3 and the interior of the casing, forming closed isolation chambers on both sides, preventing external oxygen from entering the combustion zone, and achieving suffocation-assisted fire extinguishing. During the descent of the baffle 63, the pulling rope 810 drives the compression plate 87 downward. The first elastic element 84 is compressed, and the inclined surface of the compression plate 87 presses against the round shaft 85. The round shaft 85 drives the sliding pressure rod 83 to move towards each other along the crossbeam 82. The sliding pressure rod 83 presses against the handle of the heptafluoropropane gas fire extinguisher 75, which is mechanically triggered. Heptafluoropropane gas is automatically sprayed. This gas quickly fills the sealed isolation chamber, achieving efficient fire extinguishing through chemical inhibition of the flame chain reaction and physical cooling, without corroding or leaving any residual damage to electrical equipment.

[0028] After the fire is extinguished, when a new heptafluoropropane fire extinguisher 75 needs to be replaced, the heptafluoropropane fire extinguisher 75 can be rotated. The circular end of the arc-shaped slot 77 on the mounting plate 76 of the heptafluoropropane fire extinguisher 75 is aligned with the fixing ring 74 of the guide rod 73, allowing it to be removed downwards. A new heptafluoropropane fire extinguisher 75 is then installed. The circular end of the arc-shaped slot 77 on the mounting plate 76 of the heptafluoropropane fire extinguisher 75 is aligned with the fixing ring 74 of the guide rod 73. Then, the heptafluoropropane fire extinguisher 75 is rotated, and the fixing ring 74 of the guide rod 73 engages with the arc-shaped slot 77 on the mounting plate 76. The heptafluoropropane fire extinguisher 75 can then be moved and adjusted to the optimal position by the straight slider 72 on the straight slide rail 71. Clean any dust or small amounts of residue left after extinguishing the fire from the bottom collection frame 11 inside the outer casing 1 to keep the inside of the casing clean.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A safe and fireproof power metering box for use in dry environments, characterized in that: The device includes an outer casing (1), a cover (2) that is rotatably mounted on the right side of the front of the outer casing (1), air inlets (3) spaced apart on the left and right side walls of the outer casing (1), filters (4) installed on the air inlets (3) on the left and right side walls of the outer casing (1), fans (5) installed on the left side wall of the outer casing (1), isolation components (6) with drying protection installed on the left and right sides of the outer casing (1), a fire extinguishing component (7) that can prevent fires installed on the top of the outer casing (1), a pull-out component (8) that can be used to open the fire extinguishing component (7) in an emergency, the pull-out component (8) being connected to the isolation component (6), a mounting bracket (9) installed on the rear wall of the outer casing (1), the mounting bracket (9) being used to install metering components such as electricity meters, a temperature sensor (10) installed on the fire extinguishing component (7), and a controller installed on the outside of the outer casing (1), the controller being connected to the temperature sensor (10) via a line.

2. The fireproof and safe power metering box for use in a dry environment as described in claim 1, characterized in that: The isolation assembly (6) includes partitions (61). Two partitions (61) are symmetrically arranged on both the left and right sides inside the outer casing (1). Vertical slide rails (62) are symmetrically arranged between the two partitions (61) front and back. Baffles (63) are slidably arranged between the vertical slide rails (62). Rectangular holes (64) are opened on both partitions (61). The rectangular holes (64) are at the same horizontal position as the air inlet slot (3). An isolation plate (65) is arranged between the lower parts of the two partitions (61). The isolation plate (65) is embedded in the front and back. The cylinder (66) is installed in an inlet, and a piston rod (67) is movably installed inside the cylinder (66). A buffer block (68) is installed on the top of the isolation plate (65). An air pipe (69) is connected to the lower part of the cylinder (66). The air pipe (69) passes through one of the isolation plates (65) and is located inside the outer box (1). A pressure relief valve (610) is installed on each air pipe (69). An electric actuator (611) is installed on the pressure relief valve (610). The controller is connected to the electric actuator (611) through a line.

3. The fireproof and safe electrical energy metering box for use in a dry environment as described in claim 2, characterized in that: The fire extinguishing assembly (7) includes a straight slide rail (71). The top of the outer casing (1) is provided with a straight slide rail (71). A straight slider (72) is slidably provided on the straight slide rail (71). A guide rod (73) is symmetrically and vertically provided on the straight slider (72). A fixing ring (74) is symmetrically provided at the lower part of the guide rod (73). A mounting plate (76) is provided on the top of the heptafluoropropane gas fire extinguisher (75). The mounting plate (76) of the heptafluoropropane gas fire extinguisher (75) has symmetrical arc-shaped slots (77). The centers of the arc-shaped slots (77) coincide with each other, and one end of the arc-shaped slot (77) is a central hole with a diameter larger than the outer diameter of the fixing ring (74). The heptafluoropropane gas fire extinguisher (75) is installed by cooperating with the fixing ring (74) of the guide rod (73) through the arc-shaped slots (77) of the mounting plate (76).

4. The safe and fireproof power metering box for use in a dry environment as described in claim 3, characterized in that: The pull-out assembly (8) includes a connecting frame (81). The outer casing (1) is provided with connecting frames (81) on both the top left and right sides. The bottom of the connecting frames (81) is provided with crossbars (82). A sliding pressure rod (83) is slidably provided between the two crossbars (82). A first elastic element (84) is provided between the two sliding pressure rods (83). A round shaft (85) is provided at both the left and right ends of the sliding pressure rod (83). The partitions (61) on the left and right sides that are close to each other are provided with sliding grooves (86) on the upper part of the side walls. A pressing plate is slidably provided in the sliding grooves (86). (87) The upper inner side of the extrusion plate (87) has a trapezoidal groove. The round shaft (85) is in contact with the inclined surface of the adjacent trapezoidal groove. The extrusion plate (87) moves downward to press the round shaft (85) to move in the opposite direction. The bottom of the sliding groove (86) is provided with a fixing block (88). A second elastic element (89) is provided between the fixing block (88) and the extrusion plate (87). A pull rope (810) is provided at the bottom center of the extrusion plate (87). The pull rope (810) passes through the fixing block (88) and connects to the connecting block of the side wall of the baffle (63).

5. A fireproof and safe electrical energy metering box for use in a dry environment as described in claim 4, characterized in that: It also includes a collection box (11), which is placed at the bottom of the outer box (1).

6. A fireproof and safe electrical energy metering box for use in a dry environment as described in claim 5, characterized in that: The partition (61) is made of flame-retardant ABS engineering plastic and is coated with a nano-level aluminum oxide antistatic coating.

7. A fireproof and safe electrical energy metering box for use in a dry environment as described in claim 6, characterized in that: The baffle (63) is a calcium silicate board, and an expanded graphite sealing strip is attached to the side of the baffle (63) facing the rectangular hole (64).

8. A fireproof and safe electrical energy metering box for use in a dry environment as described in claim 7, characterized in that: The top of the outer box (1) is provided with a rain cover. The rain cover adopts an inclined design and its edge extends beyond the side wall of the outer box (1). The inner surface of the rain cover is covered with a heat-insulating rock wool layer.

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