Intelligent fireproof electric meter box capable of automatically extinguishing fire
By using a pneumatically driven rotary seat and fire extinguishing pipe design, the problem of fire extinguishing device failure in meter box fires is solved, achieving all-round coverage and precise fire extinguishing, and ensuring stable fire extinguishing effect of meter boxes in various fire scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI HUAYI ELECTRIC CO LTD
- Filing Date
- 2026-03-20
- Publication Date
- 2026-06-09
Smart Images
Figure CN122164034A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of meter boxes, and more specifically to an intelligent fireproof meter box with automatic fire extinguishing. Background Technology
[0002] As a core infrastructure device in power distribution systems, meter boxes are widely used in residential communities, industrial plants, public buildings, and other scenarios. They undertake the key functions of electricity metering, line protection, and equipment installation. Their operational safety is directly related to the stability of the power system and the safety of people and property. With the popularization of high-power electrical appliances and the continuous increase in electricity load, the risk of fire in meter boxes has increased significantly. The main causes of meter box fires include: overloading of electrical circuits, short circuits caused by aging and damage to insulation layers, corrosion of metal components due to humid environment, and electrical sparks generated by poor contact. When a fire is caused by the above reasons, the electrical equipment in the meter box may burn continuously from multiple directions.
[0003] To address the aforementioned issues, Chinese invention patent CN118137312B provides an outdoor meter box protection device. This device utilizes a displacement fireproof mechanism to drive a connecting screw, which rotates clockwise inside a guide frame. Two threaded sleeves slide vertically down the inner wall of the guide frame simultaneously. During the downward movement of the linkage rack, the rotating gear ring rotates counter-clockwise upwards. The linkage shaft causes the sleeved rotating ring to rotate the nozzle counter-clockwise upwards, which in turn rotates multiple nozzles upwards. This allows the two nozzles to provide multi-directional fire protection within the meter's protective casing, enabling multi-directional fireproofing of the meter and electrical components inside the outdoor meter box.
[0004] In existing technologies, the displacement fire prevention mechanism relies on motor drive. When a fire occurs in the meter box, the flames and high temperatures can easily directly affect the drive motor itself or its supporting control circuit, causing drive failure. At this time, the nozzle cannot complete multi-directional adjustment and can only maintain an initial fixed angle for local fire extinguishing. It is difficult to cover all fire areas and cannot effectively contain the fire that continues to burn in multiple directions, resulting in poor fire extinguishing effect. Summary of the Invention
[0005] Therefore, the present invention provides an intelligent fireproof meter box with automatic fire extinguishing, which effectively solves the technical problem in the prior art that when a fire occurs in the meter box, the flames and high temperature can easily directly affect the drive motor itself or its supporting control circuit, leading to drive failure.
[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: an intelligent fireproof electrical meter box with automatic fire extinguishing, comprising a box body, a sensing element installed on the inner wall of the box body, a fire extinguishing agent compartment and a gas source compartment installed on the outer side of the box body, the fire extinguishing agent compartment being connected to the gas source compartment via a pressure pipe, and further comprising: The power pipe socket is installed vertically inside the housing; A rotary seat is rotatably installed inside the power tube seat. The rotary seat has an inner cavity and an outer cavity formed sequentially from the inside to the outside. The outer cavity has an airflow hole along the tangential direction on its outer periphery, which is directly opposite the inner wall of the power tube seat. Fire extinguishing fittings are rotatably mounted on the end of the rotating seat and are in communication with the interior of the inner cavity; The extinguishing agent pipe is connected between the extinguishing agent chamber and the inner cavity. The extinguishing agent stored in the extinguishing agent chamber can be transported to the extinguishing pipe fitting via the extinguishing agent pipe and the inner cavity. An airflow pipe connects the air source chamber and the outer cavity; Solenoid valves are respectively installed on the extinguishing agent pipe and the gas flow pipe. The solenoid valves are opened or kept closed according to the sensing data of the sensing element. A pressure cylinder is installed at the bottom of the power pipe seat. The bottom of the pressure cylinder contacts the fire extinguishing pipe fitting and applies pressure to the fire extinguishing pipe fitting as it descends. The fire extinguishing pipe fitting rotates under pressure to adjust its own extinguishing agent spray angle. When the solenoid valve is opened, a portion of the airflow enters the extinguishing agent chamber from the pressure pipe, pressurizing the extinguishing agent in the chamber and causing it to enter the extinguishing agent pipe. Another portion of the airflow enters the outer cavity from the airflow pipe and exits through the airflow hole into the power pipe seat, pushing the pressure cylinder downward under air pressure. The airflow jet exiting from the airflow hole is subjected to the reaction force of the inner wall of the power pipe seat, causing the rotary seat to rotate and synchronously driving the extinguishing pipe to rotate.
[0007] Furthermore, the airflow pipe includes a first pipe section, a second pipe section, and a transition compartment connecting the first pipe section and the second pipe section; The first pipe section, the transition pipe compartment, and the second pipe section are connected in sequence. The end of the first pipe section is connected to the gas source compartment, and the end of the second pipe section is sleeved outside the outer cavity. The second pipe section is sleeved outside the extinguishing agent pipe. The transition pipe compartment is provided with a perforation for the extinguishing agent pipe to pass through. Both the first pipe section and the extinguishing agent pipe penetrate the side wall of the box. Wherein, the outer diameter of the extinguishing agent tube is smaller than the inner diameter of the second tube section, and the end of the inner cavity is sleeved outside the end of the extinguishing agent tube.
[0008] Furthermore, a sleeve is provided between the power tube seat and the outer cavity, and at least part of the outer wall of the outer cavity is directly opposite the inner wall of the sleeve; The rotary seat includes a through pipe connected to the end of the outer cavity, a bearing ring connected to the outer cavity, and a positioning ring disposed at the bottom of the sleeve. The positioning ring is positioned directly opposite the bearing ring. A groove is formed on the inner wall of the positioning ring. A ball is embedded in the outer circumference of the bearing ring. At least part of the outer wall of the ball extends out of the bearing ring and is rolled within the groove.
[0009] Furthermore, the power pipe seat includes a main cylinder and a movable cylinder movably disposed within the main cylinder; A pressure chamber is formed between the movable cylinder and the outer cavity. Both the main cylinder and the movable cylinder are multi-faceted cylinders, and their inner walls have multiple flat surfaces. The bottom of the movable cylinder has a central groove through which the through pipe passes.
[0010] Furthermore, a first air hole is provided on the side wall of the movable cylinder, and a second air hole is provided on the side wall of the main cylinder; An air outlet pipe is connected to the outside of the first air hole, and the end of the air outlet pipe extends out of the box body; The airflow from the airflow hole into the pressure chamber pushes the movable cylinder to move away from the main cylinder, so that the first air hole gradually moves with the movable cylinder until it is directly opposite the second air hole. At this point, the gas in the pressure chamber enters the outlet pipe from the first air hole and the second air hole and is discharged.
[0011] Furthermore, a tube head is connected to the bottom of the through-tube, and the tube head communicates with the interior of the inner cavity through the through-tube; The fire extinguishing fitting includes a mounting bracket installed on the outer wall of the pipe head and a spray pipe rotatably mounted on the mounting bracket; The spray tube is rotatably mounted on the mounting shaft seat via a rotating shaft. One end of the spray tube is connected to the inside of the tube head via a connecting hose, and the other end of the spray tube is equipped with a spray head. A tapered guide protrusion is provided inside the tube head at the connection position opposite to the end of the connecting hose.
[0012] Furthermore, the pressure cylinder is connected to the bottom of the movable cylinder and has a downward opening; A torsion spring is installed on the rotating shaft, with one end of the torsion spring connected to the outer wall of the rotating shaft and the other end connected to the mounting shaft seat; The bottom of the pressure cylinder is provided with an annular abutment surface, which simultaneously abuts against the outer wall of all the spray tubes; When the pressure cylinder moves downward, the spray tube is compressed and rotates; when the pressure cylinder moves upward, the spray tube returns to its original position under the action of the torsion spring.
[0013] Furthermore, a mounting base is installed on the inner wall of the box, the main cylinder is connected to the bottom of the mounting base, and the mounting base is installed on the inner wall of the box by bolts; The sleeve is connected to the bottom of the mounting base; A pressure relief hole is provided on the mounting base directly opposite the inside of the air pressure chamber. The pressure relief hole is connected to the air pressure chamber, and a pressure relief plug is installed on the pressure relief hole.
[0014] Furthermore, the airflow hole is located on the outer cavity in a region away from the sleeve, and a guide tube is connected to the outside of the airflow hole, with the direction of the guide tube being consistent with the direction of the airflow hole.
[0015] Furthermore, the solenoid valve located on the extinguishing agent pipe opens before the solenoid valve located on the airflow pipe.
[0016] Compared with the prior art, the present invention has the following advantages: In this invention, the fire extinguishing structure, including the solenoid valve, extinguishing agent compartment, and gas source compartment, is located outside the enclosure, completely isolating it from the high temperature and direct flame attack generated by the fire. This prevents the drive components from failing due to overheating or burning, ensuring that the fire extinguishing process can respond stably and start normally when a fire occurs. The fire extinguishing is assisted by pneumatic power, eliminating the need for additional complex control circuits and auxiliary components. This reduces vulnerable parts that are easily damaged in a fire. Even if the internal wiring of the enclosure catches fire due to overload or short circuit, it will not affect the operation of the fire extinguishing structure, thus achieving high reliability of the fire extinguishing structure in fire scenarios. Driven by pneumatic power, the rotating seat rotates, simultaneously causing the fire extinguishing pipe to rotate around the vertical central axis, achieving 360° all-round fire extinguishing coverage within a single height area. This thoroughly covers all horizontal ignition points inside the enclosure. At the same time, the bottom of the pressure cylinder contacts the fire extinguishing pipe and applies pressure as it descends, prompting the fire extinguishing pipe to actively adjust the angle of the extinguishing agent spray, achieving precise coverage of areas at different heights. This forms a dual fire extinguishing mode of horizontal rotational full coverage and vertical angle self-adaptation, improving fire extinguishing coverage and fire extinguishing effect. This invention can complete the entire fire extinguishing action by covering different heights and rotating omnidirectionally at a single height using only pneumatic power. It eliminates the need for easily failed power components such as motors, which simplifies the overall structure of the fire extinguishing system, reduces the probability of failure, and improves the adaptability of the structure to harsh fire environments. It ensures stable and comprehensive fire extinguishing effects in fires caused by various factors such as meter box overload, insulation aging, and moisture corrosion. Attached Figure Description
[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of an intelligent fireproof electrical meter box with automatic fire extinguishing provided in an embodiment of the present invention; Figure 2 This is a structural schematic diagram from another perspective of an intelligent fireproof electrical meter box with automatic fire extinguishing provided in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the fire extinguishing structure, including the fire extinguishing agent chamber, power pipe seat, and fire extinguishing pipe fittings, in an embodiment of the present invention. Figure 4 for Figure 3 A front view structural diagram; Figure 5 for Figure 3 A top-view structural diagram; Figure 6 for Figure 5 A planar sectional view along the AA direction; Figure 7 for Figure 6 Enlarged structural diagram of the rotating seat, power pipe seat, and fire extinguishing pipe fitting; Figure 8 for Figure 4 A magnified structural diagram of A in the middle; Figure 9 for Figure 7 A magnified structural diagram of B in the diagram.
[0019] The labels in the diagram represent the following: 1. Housing; 2. Extinguishing agent compartment; 3. Air pressure pipe; 4. Power pipe seat; 5. Rotary seat; 6. Extinguishing pipe fittings; 7. Extinguishing agent pipe; 8. Air flow pipe; 9. Solenoid valve; 10. Pressure cylinder; 11. Sleeve; 12. Mounting base; 13. Pressure relief hole; 14. Pressure relief plug; 41. Main cylinder; 42. Movable cylinder; 43. Air pressure chamber; 44. Central groove; 45. First air hole; 46. Second air hole; 47. Air outlet pipe; 51. Inner cavity; 52. Outer cavity; 53. Airflow hole; 54. Through pipe; 55. Bearing ring; 56. Positioning ring; 57. Ring groove; 58. Ball bearing; 59. Pipe head; 510. Guide pipe; 61. Mounting shaft seat; 62. Spray tube; 63. Rotating shaft; 64. Connecting hose; 65. Spray head; 66. Conical guide protrusion; 81. First pipe section; 82. Second pipe section; 83. Transition compartment; 84. Perforation. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] like Figures 1-6 As shown, the present invention provides an intelligent fireproof meter box for automatic fire extinguishing, including a box body 1. A sensing element is installed on the inner wall of the box body 1. A fire extinguishing agent compartment 2 and a gas source compartment (not shown in the figure) are installed outside the box body 1. The fire extinguishing agent compartment 2 is connected to the gas source compartment through a gas pressure pipe 3.
[0022] The sensing elements are generally smoke sensors and temperature sensors. Multiple sensing elements are set at different positions on the inner wall of the housing 1. When smoke or abnormal temperature is detected, the gas source chamber supplies gas to the extinguishing agent chamber 2. Under the action of gas pressure, the extinguishing agent raw material is ejected.
[0023] In addition to the above-mentioned structure, the intelligent fireproof electrical meter box for automatic fire extinguishing provided by the present invention also includes a power pipe seat 4, a rotary seat 5, a fire extinguishing pipe 6, a fire extinguishing agent pipe 7, an airflow pipe 8, a solenoid valve 9, a pressure cylinder 10, and other structures.
[0024] The power pipe socket 4 is installed vertically inside the box 1, or it can be installed horizontally inside the box 1, depending on the internal layout of the meter box. For example, if there are multiple horizontally arranged compartments inside the meter box, the power pipe socket 4 and other related structures can be installed vertically between the multiple compartments to facilitate fire extinguishing in multiple compartments. If there are multiple vertically arranged compartments inside the meter box, the power pipe socket 4 and other related structures can be installed horizontally between the multiple compartments to facilitate fire extinguishing in multiple compartments.
[0025] The rotating seat 5 is rotatably installed in the power tube seat 4 along the axial direction (central axis direction). The rotating seat 5 has an inner cavity 51 and an outer cavity 52 formed from the inside to the outside. The inner cavity 51 is used to connect to the extinguishing agent tube 7, and the outer cavity 52 is used to connect to the airflow tube 8. The outer cavity 52 has an airflow hole 53 on its outer periphery along the tangential direction, which is directly opposite to the inner wall of the power tube seat 4. The function of the airflow hole 53 is to make the outgoing airflow receive a reverse force, thereby causing the rotating seat 5 to rotate.
[0026] The fire extinguishing fitting 6 is rotatably installed at the end of the rotating seat 5 and is connected to the interior of the inner cavity 51. As the rotating seat 5 rotates around the central axis, the fire extinguishing fitting 6 can rotate with it so that the fire extinguishing fitting 6 can extinguish the fire completely during the horizontal rotation.
[0027] The extinguishing agent pipe 7 is connected between the extinguishing agent chamber 2 and the inner cavity 51. The extinguishing agent stored in the extinguishing agent chamber 2 can be transported to the extinguishing fitting 7 through the extinguishing agent pipe 7 and the inner cavity 51. When smoke or abnormal temperature is detected, the gas source chamber provides gas to the extinguishing agent chamber 2 through the gas pressure pipe 3. Under the action of gas pressure, the extinguishing agent raw material is forced to enter the extinguishing fitting 6 after passing through the extinguishing agent pipe 7 and the inner cavity 51, thereby extinguishing the fire.
[0028] The airflow pipe 8 is connected between the gas source chamber and the outer cavity 52. The gas source chamber stores compressed gas. When the airflow pipe 8 or the pressure pipe 3 is opened, the gas in the gas source chamber will quickly enter the outer cavity 52 through the airflow pipe 8 and enter the fire extinguishing agent chamber 2 through the pressure pipe 3.
[0029] Solenoid valves 9 are respectively installed on the extinguishing agent pipe 7 and the airflow pipe 8. Solenoid valves 9 open or remain closed according to the sensing data of the sensing element. When smoke or abnormal temperature is sensed, solenoid valves 9 are activated and open the extinguishing agent pipe 7 and the airflow pipe 8, so that the gas in the gas source chamber quickly enters the outer cavity 52 through the airflow pipe 8 and enters the extinguishing agent chamber 2 through the air pressure pipe 3.
[0030] In order for the solenoid valve 9 to be activated when the sensing element detects smoke or abnormal temperature, an additional control circuit should be provided in this invention to control the opening and closing of the solenoid valve 9 by the sensing value of the sensing element.
[0031] In addition, in this invention, the gas source chamber can be replenished with gas after a certain number of uses to facilitate reuse after fire extinguishing and avoid insufficient gas pressure to cause the extinguishing agent raw material to be sprayed out.
[0032] The pressure cylinder 10 is installed at the bottom of the power pipe seat 4. The bottom of the pressure cylinder 10 contacts the fire extinguishing pipe fitting 6 and applies pressure to the fire extinguishing pipe fitting 6 as it descends. The fire extinguishing pipe fitting 6 rotates under pressure to adjust its own extinguishing agent spray angle.
[0033] The fire extinguishing pipe fitting 6 rotates around the vertical central axis following the rotating base 5, so as to provide comprehensive fire extinguishing coverage within a certain height area. The fire extinguishing pipe fitting 6 rotates around the horizontal axis under pressure, so that the fire extinguishing pipe fitting 6 can adjust the angle of the fire extinguishing agent spray, thereby extinguishing fires in areas at different heights.
[0034] When the solenoid valve 9 is opened, a portion of the airflow enters the extinguishing agent chamber 2 from the air pressure pipe 3, pressurizing the extinguishing agent in the extinguishing agent chamber 2 and causing it to enter the extinguishing agent pipe 7. Then, it is discharged from the extinguishing pipe fitting 6 to extinguish the fire. Another portion of the airflow enters the outer cavity 52 from the airflow pipe 8 and is discharged from the airflow hole 53 to the power pipe seat 4, where it pushes the pressure cylinder 10 down under the action of air pressure. The airflow jet discharged from the airflow hole 53 is subjected to the reaction force of the inner wall of the power pipe seat 4, causing the rotary seat 5 to rotate and synchronously driving the extinguishing pipe fitting 6 to rotate. This allows the extinguishing pipe fitting 6 to rotate around the vertical central axis while spraying the extinguishing agent, achieving all-round coverage extinguishing within a height position area.
[0035] In this invention, the fire extinguishing structures such as the solenoid valve 9, the extinguishing agent chamber 2, and the gas source chamber are all located outside the housing 1, completely isolating them from the high temperature and direct flame attack generated by the fire. This prevents the drive components from failing due to overheating or burning, ensuring that the fire extinguishing process can respond stably and start normally when a fire occurs. The fire extinguishing is assisted by pneumatic power, eliminating the need for additional complex control circuits and auxiliary components. This reduces vulnerable parts that are easily damaged in a fire. Even if the internal wiring of the housing 1 catches fire due to overload or short circuit, it will not affect the operation of the fire extinguishing structure, thus achieving high reliability of the fire extinguishing structure in fire scenarios. The rotating seat 5 is driven by pneumatic power, which simultaneously drives the fire extinguishing pipe 6 to rotate around the vertical central axis, achieving 360° all-round fire extinguishing coverage in a single height position area, thoroughly covering all horizontal ignition points inside the box 1. At the same time, the bottom of the pressure cylinder 10 contacts the fire extinguishing pipe 6 and applies pressure when descending, causing the fire extinguishing pipe 6 to actively adjust the spray angle of the fire extinguishing agent, achieving precise coverage of different height position areas, forming a dual fire extinguishing mode of horizontal rotation full coverage and vertical angle self-adaptation, improving the fire extinguishing coverage rate and fire extinguishing effect. This invention can complete the entire fire extinguishing action by covering different heights and rotating omnidirectionally at a single height using only pneumatic power. It eliminates the need for easily failed power components such as motors, which simplifies the overall structure of the fire extinguishing system, reduces the probability of failure, and improves the adaptability of the structure to harsh fire environments. It ensures stable and comprehensive fire extinguishing effects in fires caused by various factors such as meter box overload, insulation aging, and moisture corrosion.
[0036] The airflow pipe 8 connects the gas source chamber and the outer cavity 52. The gas source chamber stores compressed gas. When the airflow pipe 8 or the pressure pipe 3 is opened, the gas in the gas source chamber quickly enters the outer cavity 52 through the airflow pipe 8 and enters the extinguishing agent chamber 2 through the pressure pipe 3. The airflow pipe 8 serves to transport the gas in the gas source chamber to the outer cavity 52. Specifically, as shown... Figure 3 As shown, the airflow pipe 8 includes a first pipe section 81, a second pipe section 82, and a transition chamber 83 connecting the first pipe section 81 and the second pipe section 82; The first pipe section 81, the transition pipe compartment 83, and the second pipe section 82 are connected in sequence. The end of the first pipe section 81 is connected to the gas source compartment. The first pipe section 81 and the extinguishing agent pipe 7 do not interfere with each other. The end of the second pipe section 82 is sleeved outside the outer cavity 52. The second pipe section 82 is sleeved outside the extinguishing agent pipe 7. The transition pipe compartment 83 is provided with a through hole 84 for the extinguishing agent pipe 7 to pass through. The through hole 84 is sealed. The first pipe section 81 and the extinguishing agent pipe 7 both penetrate the side wall of the box 1. The penetration points of the first pipe section 81 and the extinguishing agent pipe 7 on the side wall of the box 1 do not interfere with each other and are sealed with elastic sealing rings respectively.
[0037] The outer diameter of the extinguishing agent pipe 7 is smaller than the inner diameter of the second pipe section 82. The outer wall of the extinguishing agent pipe 7 does not contact the inner wall of the second pipe section 82. There is a certain space between the extinguishing agent pipe 7 and the second pipe section 82 to allow gas to pass through. The inner cavity 51 is fitted outside the end of the extinguishing agent pipe 7.
[0038] The inner cavity 51 and the outer cavity 52 are formed as a whole. When the rotating seat 5 rotates, the inner cavity 51 and the outer cavity 52 are also rotating. At this time, the extinguishing agent tube 7 remains fixed, and the inner cavity 51 rotates relative to the extinguishing agent tube 7.
[0039] A sleeve 11 is provided between the power tube seat 4 and the outer cavity 52. At least part of the outer wall of the outer cavity 52 is directly opposite the inner wall of the sleeve 11, and the other part of the outer wall of the outer cavity 52 is directly opposite the inner wall of the power tube seat 4.
[0040] Rotary seat 5 is axially rotatable within power tube seat 4, specifically, as shown in... Figure 6 and Figure 7 As shown, the rotary seat 5 includes a through pipe 54 connected to the end of the outer cavity 52, a bearing ring 55 connected to the outside of the outer cavity 52, and a positioning ring 56 disposed at the bottom of the sleeve 11. The positioning ring 56 is directly opposite the bearing ring 55. The inner wall of the positioning ring 56 is provided with an annular groove 57. The outer circumference of the bearing ring 55 is fitted with balls 58. At least part of the outer wall of the balls 58 extends out of the bearing ring 55 and is rolled in the annular groove 57.
[0041] When the rotary seat 5 rotates, the outer cavity 52 and the inner cavity 51 rotate, the bearing ring 55 rotates with the outer cavity 52, and the balls 58 roll in the ring groove 57. During the rotation of the rotary seat 5, apart from the friction between the outer cavity 52 and the second pipe section 82, the friction between the inner cavity 51 and the extinguishing agent pipe 7, the friction between the through pipe 54 and the movable cylinder 42, and the friction between the bearing ring 55 and the positioning ring 56, almost nothing else will become a resistance during the rotation of the rotary seat 5. Therefore, the design of the balls 58 not only makes the rotation process of the inner cavity 51 and the outer cavity 52 smoother, but also reduces a certain amount of rotational resistance.
[0042] The power connector 4 can assist the outer cavity 52 in rotating along the vertical central axis, and also assist the fire extinguishing pipe fitting 6 in adjusting its angle. Specifically, for example... Figure 6 and Figure 9 As shown, the power pipe seat 4 includes a main cylinder 41 and a movable cylinder 42 movably disposed within the main cylinder 41; A pressure chamber 43 is formed between the movable cylinder 42 and the outer cavity 52. Airflow enters the outer cavity 52 from the airflow pipe 8 and exits into the pressure chamber 43 through the airflow hole 53. The airflow jet exiting from the airflow hole 53 is subjected to the reaction force of the inner wall of the movable cylinder 42, causing the outer cavity 52 to rotate and synchronously drive the fire extinguishing pipe 6 to rotate. This allows the fire extinguishing pipe 6 to rotate around the vertical central axis while spraying the extinguishing agent, achieving all-round coverage fire extinguishing within a height position area.
[0043] Generally, the wall surface of the movable cylinder 42 can be set as a curved surface or a flat surface. When the wall surface of the movable cylinder 42 is set as a curved surface, the airflow discharged from the airflow hole 53 is prone to flow to the side under the guidance of the curved surface, which may make it difficult to form a certain reverse force. In this regard, the present invention sets the main cylinder 41 and the movable cylinder 42 as multi-faceted cylinders and forms multi-faceted flat walls on their inner walls. With the flat walls inside the movable cylinder 42, the airflow discharged from the airflow hole 53 is more likely to make the movable cylinder 42 generate a reverse force, thereby causing the outer cavity 52 to rotate.
[0044] Furthermore, the number of airflow holes 53 can be the same as the number of edges of the polygonal cylinder. Under this design, each airflow stream discharged from the airflow hole 53 forms the same angle with the inner wall of the movable cylinder 42 at every moment, thereby generating the same reaction force at each airflow hole 53, making the rotation process of the outer cavity 52 smoother.
[0045] The bottom of the movable cylinder 42 is provided with a central groove 44 through which the pipe 54 passes. The outer wall of the pipe 54 contacts the central groove 44. A corresponding sealing element can be set at the interface to prevent the gas in the air pressure chamber 43 from overflowing between the pipe 54 and the central groove 44.
[0046] To further enhance the effect of pneumatic power in rotating the outer cavity 52, the present invention is designed as follows: the airflow hole 53 is located on the outer cavity 52 in a region away from the sleeve 11, and a guide tube 510 is connected to the outside of the airflow hole 53, with the direction of the guide tube 510 being consistent with the direction of the airflow hole 53.
[0047] In the above embodiments, if the length of the airflow hole 53 is short, the guiding effect of the airflow is weak during the process of the airflow passing through the airflow hole 53. It may be difficult to form a bundle of airflow when the airflow hole 53 is discharged. Under the guidance of the guide tube 510, the airflow is made to rush outward in a more regular bundle shape. Under the action of inertia, the airflow impacts the inner wall of the movable cylinder 42 after leaving the guide tube 510, causing the outer cavity 52 to rotate under the reaction force of the movable cylinder 42.
[0048] Airflow enters the outer cavity 52 from the airflow pipe 8 and exits into the power pipe seat 4 through the airflow hole 53, thereby pushing the pressure cylinder 10 downward under air pressure. The pressure cylinder 10 stops descending when it reaches a certain height. To achieve this purpose, the present invention is designed as follows: Figure 9 As shown, a first air hole 45 is provided on the side wall of the movable cylinder 42, and a second air hole 46 is provided on the side wall of the main cylinder 41. The first vent 45 is connected to an exhaust pipe 47, and the end of the exhaust pipe 47 extends out of the box body 1. The airflow from the airflow hole 53 into the pressure chamber 43 pushes the movable cylinder 42 to move away from the main cylinder 41, so that the first air hole 45 gradually moves with the movable cylinder 42 until it is directly opposite the second air hole 46. Then, the gas in the pressure chamber 43 enters the air outlet pipe 47 from the first air hole 45 and the second air hole 46 and is discharged.
[0049] In the initial state, more and more gas is discharged from the airflow hole 53 into the pressure chamber 43. Under the action of airflow pressure, the movable cylinder 42 is pushed to move away from the main cylinder 41, so that the first air hole 45 gradually moves with the movable cylinder 42 until it is directly opposite the second air hole 46. When the first air hole 45 and the second air hole 46 are directly opposite each other, the gas in the pressure chamber 43 enters the air outlet pipe 47 from the first air hole 45 and the second air hole 46 and is discharged. At this time, the gas in the pressure chamber 43 will not increase further and will no longer exert pressure on the pressure cylinder 10.
[0050] Under normal circumstances, as the pressure cylinder 10 gradually descends, it drives the fire extinguishing pipe fitting 6 to adjust to a certain angle. During the continuous adjustment of the angle, it has completed the comprehensive fire extinguishing of areas at different heights. When the first air hole 45 and the second air hole 46 are directly opposite each other, the fire extinguishing work is basically completed. At this time, in order to ensure that the movable cylinder 42 can be reset when no airflow enters the air pressure chamber 43, the following design can be made: a mounting seat 12 is installed on the inner wall of the box 1. The mounting seat 12 is installed on the inner wall of the box 1 by bolts. The main cylinder 41 is connected to the bottom of the mounting seat 12, and the sleeve 11 is connected to the bottom of the mounting seat 12. A reset spring is provided between the top of the main cylinder 41 and the top of the movable cylinder 42. The reset spring is sleeved on the outer circumference of the sleeve 11. When the movable cylinder 42 moves down, the reset spring is stretched.
[0051] like Figure 7 As shown, a pressure relief hole 13 is provided on the mounting base 12 directly opposite the inside of the air pressure chamber 43. A pressure relief plug 14 is installed on the pressure relief hole 13. The main cylinder 41 is connected to the mounting base 12. The main cylinder 41 is open at both the top and bottom. The movable cylinder 42 is open upward. Therefore, the air pressure chamber 43 is directly opposite to and connected to the pressure relief hole 13. When the pressure relief hole 13 is open, the gas in the air pressure chamber 43 can be discharged from the pressure relief hole 13.
[0052] Under the force of the return spring, in the initial state, the movable cylinder 42 is at a certain height inside the main cylinder 41, and the first air hole 45 and the second air hole 46 are misaligned. As airflow is gradually injected into the air pressure chamber 43, the movable cylinder 42 moves downward under the action of air pressure, and the return spring is stretched. When the movable cylinder 42 moves downward until the first air hole 45 and the second air hole 46 are aligned, the airflow is discharged from the first air hole 45 and the second air hole 46, and the fire extinguishing process ends. At this time, the movable cylinder 42 may return to a certain distance under the pulling force of the return spring. However, when the movable cylinder 42 is pulled up by the return spring until the first air hole 45 and the second air hole 46 are misaligned, there is still a certain amount of gas in the air pressure chamber 43, which prevents the movable cylinder 42 from returning to its original position. At this time, the pressure relief plug 14 is removed, and the gas is discharged from the pressure relief hole 13. Under the elastic force of the return spring, the movable cylinder 42 returns to its original position.
[0053] After the airflow is injected into the air pressure chamber 43, it may overflow between the positioning ring 56 and the bearing ring 55. To address this, the penetration point of the second pipe section 82 on the mounting base 12 can be made completely sealed to prevent the airflow from escaping and causing the movable cylinder 42 to fail to descend.
[0054] The fire extinguishing pipe fitting 6 is rotatably mounted on the end of the rotating seat 5 and is connected to the interior of the inner cavity 51. Specifically, as shown in the figure... Figure 7 , Figure 8 and Figure 9 As shown, the bottom of the through pipe 54 is connected to the pipe head 59, and the pipe head 59 communicates with the inside of the inner cavity 51 through the through pipe 54. The fire extinguishing fitting 6 includes a mounting seat 61 installed on the outer wall of the pipe head 59 and a spray pipe 62 rotatably installed on the mounting seat 61. The spray tube 62 is rotatably mounted on the mounting seat 61 via the rotating shaft 63. One end of the spray tube 62 is connected to the inside of the tube head 59 via the connecting hose 64. The other end of the spray tube 62 is equipped with a spray head 65. A tapered guide protrusion 66 is provided inside the tube head 59 at the connection position opposite to the end of the connecting hose 64.
[0055] The extinguishing agent raw material passes through the inner cavity 51 and the through pipe 54 in sequence, and enters the spray pipe 62 along the conical guide protrusion 66. It is then sprayed out from the spray head 65. The conical guide protrusion 66 plays a guiding role, preventing a small amount of extinguishing agent from accumulating inside the through pipe 54.
[0056] To further achieve angle adjustment of the spray tube 62, the present invention is designed as follows: the pressure cylinder 10 is connected to the bottom of the movable cylinder 42 and opens downward; A torsion spring is installed on the rotating shaft 63. One end of the torsion spring is connected to the outer wall of the rotating shaft 63, and the other end is connected to the mounting seat 61. The bottom of the pressure cylinder 10 is provided with an annular abutment surface, which abuts against the outer wall of all the spray tubes 62 at the same time, ensuring that all the spray tubes 62 are subjected to uniform force and rotate synchronously when the pressure cylinder 10 moves down. When the pressure cylinder 10 moves downward, the spray tube 62 is compressed and rotates; when the pressure cylinder 10 moves upward, the spray tube 62 is reset by the action of the torsion spring.
[0057] In the initial state, the spray tube 62 is close to vertical. As the pressure cylinder 10 gradually presses down, the spray tube 62 is compressed and rotates outward, gradually becoming more horizontal. During this process, the spray tube 62 rotates outward, and its spray angle gradually changes, causing the torsion spring to deform.
[0058] After the fire is extinguished, the pressure relief plug 14 is removed, and the gas is discharged from the pressure relief hole 13. Under the action of the return spring, the movable cylinder 42 drives the pressure cylinder 10 to return to its original state. At this time, under the action of the torsion spring, the spray tube 62 gradually rotates and returns to its initial state.
[0059] After each fire is extinguished, the control circuit will report a fire alarm. After receiving the fire alarm, the maintenance personnel will arrive at the scene to inspect and clean the meter box, and manually remove the pressure relief plug 14 to reset the movable cylinder 42, thus facilitating subsequent fire extinguishing.
[0060] In practical applications, solenoid valves 9 are generally set to open simultaneously. However, when they are opened simultaneously, there may be a situation where the airflow directly enters the air pressure chamber 43, causing the movable cylinder 42 to descend. If the extinguishing agent has not yet reached the extinguishing pipe 6 at this time, it may result in some designated areas not being sprayed with extinguishing agent in time. To address this, the following design can be made: the solenoid valve 9 installed on the extinguishing agent pipe 7 opens before the solenoid valve 9 installed on the airflow pipe 8.
[0061] First, open the solenoid valve 9 installed on the extinguishing agent pipe 7. The airflow in the gas source chamber enters the extinguishing agent chamber 2 through the air pressure pipe 3, pressurizing the extinguishing agent in the extinguishing agent chamber 2 and causing it to enter the extinguishing agent pipe 7. Then, it is discharged from the extinguishing pipe fitting 6 and the fire is extinguished. Then, the solenoid valve 9 installed on the airflow pipe 8 is opened, and the airflow in the air source chamber enters the outer cavity 52 through the airflow pipe 8 and is discharged into the power pipe seat 4 through the airflow hole 53. Under the action of air pressure, the pressure cylinder 10 is pushed down. At the same time, the airflow jet discharged from the airflow hole 53 is subjected to the reaction force of the inner wall of the power pipe seat 4, which causes the rotary seat 5 to rotate and synchronously drives the fire extinguishing pipe 6 to rotate. This allows the fire extinguishing pipe 6 to rotate around the vertical central axis and gradually expand outward while spraying the extinguishing agent, so as to achieve all-round coverage fire extinguishing in areas at different heights.
[0062] The different activation sequences of the solenoid valve 9 ensure that the extinguishing agent spraying area of the fire extinguishing pipe fitting 6 does not miss the area it was initially facing, thus ensuring comprehensive fire extinguishing coverage.
[0063] The larger the rotation angle range of the spray tube 62, the wider the area of different height positions covered by its spraying process. The angle variation range of the spray tube 62 is affected by factors such as the downward movement range of the pressure cylinder 10. To increase the angle variation range of the spray tube 62, the offset distance between the first air hole 45 and the second air hole 46 in the initial state can be increased, so that the pressure cylinder 10 needs to move down a large distance before it can stop, making the angle of pressure variation of the spray tube 62 larger and the height position area covered by its spraying wider.
[0064] In addition, the end of each fire extinguishing process is controlled by solenoid valve 9. Specifically, solenoid valve 9 can be automatically closed when the sensing element does not detect the corresponding abnormality or at a preset time, thereby stopping the spraying of the fire extinguishing agent.
[0065] In summary, the main implementation process of this invention is as follows: When the sensing element detects smoke or abnormal temperature, the solenoid valve 9 installed on the extinguishing agent pipe 7 is opened first. The airflow in the gas source chamber enters the extinguishing agent chamber 2 through the air pressure pipe 3, pressurizing the extinguishing agent in the extinguishing agent chamber 2 and entering the extinguishing agent pipe 7. Then, it passes through the inner cavity 51, the through pipe 54, the pipe head 59, the connecting hose 64, the spray pipe 62 and is discharged from the spray head 65 to extinguish the fire. Then, the solenoid valve 9 installed on the airflow pipe 8 is opened, and the airflow in the air source chamber enters the outer cavity 52 through the airflow pipe 8 and is discharged into the air pressure chamber 43 through the airflow hole 53. Under the action of air pressure, the pressure cylinder 10 is pushed down. At the same time, the airflow jet discharged from the airflow hole 53 is subjected to the reaction force of the inner wall of the movable cylinder 42, which causes the rotating seat 5 to rotate and synchronously drives the fire extinguishing pipe 6 to rotate. This allows the fire extinguishing pipe 6 to rotate around the vertical central axis and gradually expand outward (rotate around the horizontal direction and adjust the angle) while spraying the extinguishing agent, so as to achieve all-round coverage fire extinguishing in different height areas. After a period of time, the first vent 45 gradually moves with the movable cylinder 42 until it is directly opposite the second vent 46. When the first vent 45 and the second vent 46 are directly opposite each other, the gas in the pressure chamber 43 enters the outlet pipe 47 from the first vent 45 and the second vent 46 and is discharged. The gas in the pressure chamber 43 will no longer increase and will no longer exert pressure on the pressure cylinder 10. The pressure cylinder 10 will no longer continue to descend, and the solenoid valve 9 will close. Maintenance personnel arrived at the site to carry out maintenance and cleaning, and removed the pressure relief plug 14. After the gas was released, the movable cylinder 42 drove the pressure cylinder 10 to reset, the spray pipe 62 rotated back to the initial angle, and the pressure relief plug 14 was reinstalled.
[0066] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.
Claims
1. An intelligent fireproof electrical meter box with automatic fire extinguishing function, comprising a box body (1), a sensing element installed on the inner wall of the box body (1), and a fire extinguishing agent compartment (2) and a gas source compartment installed outside the box body (1), wherein the fire extinguishing agent compartment (2) is connected to the gas source compartment via a pressure pipe (3), characterized in that, include: The power pipe seat (4) is vertically installed inside the housing (1); A rotary seat (5) is rotatably installed in the power tube seat (4) along the axial direction. The rotary seat (5) forms an inner cavity (51) and an outer cavity (52) from the inside to the outside. The outer cavity (52) has an airflow hole (53) on its outer periphery along the tangential direction, which is directly opposite to the inner wall of the power tube seat (4). Fire extinguishing fitting (6) is rotatably mounted on the end of the rotating seat (5) and is in communication with the interior of the inner cavity (51); The extinguishing agent pipe (7) is connected between the extinguishing agent chamber (2) and the inner cavity (51). The extinguishing agent stored in the extinguishing agent chamber (2) can be transported to the extinguishing pipe fitting (6) via the extinguishing agent pipe (7) and the inner cavity (51). An airflow pipe (8) is connected between the air source chamber and the outer cavity (52); Solenoid valves (9) are respectively installed on the extinguishing agent pipe (7) and the airflow pipe (8). The solenoid valves (9) are opened or kept closed according to the sensing data of the sensing element. Pressure cylinder (10) is installed at the bottom of the power pipe seat (4). The bottom of the pressure cylinder (10) contacts the fire extinguishing pipe fitting (6) and applies pressure to the fire extinguishing pipe fitting (6) when it descends. The fire extinguishing pipe fitting (6) rotates under pressure to adjust its own extinguishing agent spray angle. When the solenoid valve (9) is opened, a portion of the airflow enters the extinguishing agent chamber (2) from the air pressure pipe (3), pressurizing the extinguishing agent in the extinguishing agent chamber (2) and entering the extinguishing agent pipe (7). Another portion of the airflow enters the outer cavity (52) from the airflow pipe (8) and is discharged from the airflow hole (53) into the power pipe seat (4) to push the pressure cylinder (10) down under the action of air pressure. The airflow bundle discharged from the airflow hole (53) is subjected to the reaction force of the inner wall of the power pipe seat (4), causing the rotary seat (5) to rotate and synchronously driving the extinguishing pipe (6) to rotate.
2. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 1, characterized in that, The airflow pipe (8) includes a first pipe section (81), a second pipe section (82), and a transition chamber (83) connecting the first pipe section (81) and the second pipe section (82). The first pipe section (81), the transition pipe compartment (83), and the second pipe section (82) are connected in sequence. The end of the first pipe section (81) is connected to the gas source compartment, and the end of the second pipe section (82) is sleeved outside the outer cavity (52). The second pipe section (82) is sleeved outside the fire extinguishing agent pipe (7). The transition pipe compartment (83) is provided with a perforation (84) for the fire extinguishing agent pipe (7) to pass through. The first pipe section (81) and the fire extinguishing agent pipe (7) both penetrate the side wall of the box body (1). Wherein, the outer diameter of the extinguishing agent tube (7) is smaller than the inner diameter of the second tube section (82), and the end of the inner cavity (51) is sleeved outside the end of the extinguishing agent tube (7).
3. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 2, characterized in that, A sleeve (11) is provided between the power tube seat (4) and the outer cavity (52), and at least part of the outer wall of the outer cavity (52) is directly opposite the inner wall of the sleeve (11); The rotary seat (5) includes a through pipe (54) connected to the end of the outer cavity (52), a bearing ring (55) connected to the outside of the outer cavity (52), and a positioning ring (56) disposed at the bottom of the sleeve (11). The positioning ring (56) is directly opposite the bearing ring (55). The inner wall of the positioning ring (56) is provided with an annular groove (57). The outer periphery of the bearing ring (55) is fitted with balls (58). At least part of the outer wall of the balls (58) extends out of the bearing ring (55) and is rolled in the annular groove (57).
4. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 3, characterized in that, The power pipe seat (4) includes a main cylinder (41) and a movable cylinder (42) movably disposed within the main cylinder (41). A pneumatic cavity (43) is formed between the movable cylinder (42) and the outer cavity (52). Both the main cylinder (41) and the movable cylinder (42) are multi-faceted cylinders, and multi-faceted straight walls are formed on their inner walls. The bottom of the movable cylinder (42) is provided with a central groove (44) through which the through pipe (54) passes.
5. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 4, characterized in that, The movable cylinder (42) has a first air hole (45) on its side wall, and the main cylinder (41) has a second air hole (46) on its side wall. The first air hole (45) is connected to an air outlet pipe (47), and the end of the air outlet pipe (47) extends out of the box body (1); The airflow from the airflow hole (53) into the pressure chamber (43) pushes the movable cylinder (42) to move away from the main cylinder (41), so that the first air hole (45) gradually moves with the movable cylinder (42) to be directly opposite the second air hole (46). At this time, the gas in the pressure chamber (43) enters the air outlet pipe (47) from the first air hole (45) and the second air hole (46) and is discharged.
6. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 5, characterized in that, The bottom of the tube (54) is connected to a tube head (59), and the tube head (59) is connected to the inside of the inner cavity (51) through the tube (54); The fire extinguishing fitting (6) includes a mounting seat (61) installed on the outer wall of the pipe head (59) and a spray pipe (62) rotatably mounted on the mounting seat (61). The spray tube (62) is rotatably mounted on the mounting shaft seat (61) via a rotating shaft (63). One end of the spray tube (62) is connected to the inside of the tube head (59) via a connecting hose (64). The other end of the spray tube (62) is equipped with a spray head (65). A tapered guide protrusion (66) is provided inside the tube head (59) at the connection position opposite to the end of the connecting hose (64).
7. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 6, characterized in that, The pressure cylinder (10) is connected to the bottom of the movable cylinder (42) and has a downward opening; A torsion spring is installed on the rotating shaft (63), one end of which is connected to the outer wall of the rotating shaft (63) and the other end is connected to the mounting seat (61); The bottom of the pressure cylinder (10) is provided with an annular abutment surface, which abuts against the outer wall of all the spray tubes (62); When the pressure cylinder (10) moves downward, the spray tube (62) is compressed and rotates; when the pressure cylinder (10) moves upward, the spray tube (62) is reset under the action of the torsion spring.
8. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 7, characterized in that, An mounting base (12) is installed on the inner wall of the box (1), and the main cylinder (41) is connected to the bottom of the mounting base (12). The mounting base (12) is installed on the inner wall of the box (1) by the bolts. The sleeve (11) is connected to the bottom of the mounting base (12); A pressure relief hole (13) is provided on the mounting base (12) directly opposite the air pressure chamber (43). The pressure relief hole (13) is connected to the air pressure chamber (43), and a pressure relief plug (14) is installed on the pressure relief hole (13).
9. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 8, characterized in that, The airflow hole (53) is located on the outer cavity (52) in a region away from the sleeve (11). A guide pipe (510) is connected to the outside of the airflow hole (53), and the direction of the guide pipe (510) is consistent with the direction of the airflow hole (53).
10. The intelligent fireproof electrical meter box with automatic fire extinguishing according to claim 1, characterized in that, The solenoid valve (9) located on the extinguishing agent pipe (7) opens before the solenoid valve (9) located on the airflow pipe (8).