High overload launchable dry chemical fire extinguisher and method of use

Abstract

The application belongs to the technical field of fire extinguishing devices, and particularly relates to a high-overload launching dry powder fire extinguisher and a use method. The control valve of the fire extinguisher comprises a cylinder cover, a cylinder, a mounting seat and a push-pull assembly. The cylinder cover, the cylinder and the mounting seat are sequentially connected from top to bottom. The upper surface of the cylinder cover is respectively provided with a trigger valve and an inflation valve I. The side surface of the mounting seat is provided with a powder outlet. The cylinder and the mounting seat are internally connected with the push-pull assembly. The dry powder storage tank comprises a moving part and a tank body. The moving part is internally connected in the tank body. The dry powder storage tank below the moving part is filled with dry powder. The upper part of the moving part is internally connected with the lower end of the mounting seat. The upper surface of the tank body is provided with an inflation valve II. The problems that the existing fire extinguisher cannot simultaneously have the high-overload resistance, the delay function and the anti-toppling function are solved. The fire extinguisher has the characteristics of simple structure, axial high-overload resistance, high-overload triggering, delay ejection of dry powder, adjustable delay time and ejection of most dry powder in the tank body in the toppling state.

Description

Technical Field

[0001] This invention belongs to the field of fire extinguishing device technology, specifically relating to a high overload dry powder fire extinguisher and its usage method. Background Technology

[0002] In modern high-rise building fires, the typical height of fire ladders in China is around 20 stories, making it difficult to extinguish fires on higher floors from the outside. Another firefighting method involves using electromagnetic guns on the ground to launch fire extinguishers into the burning floor through windows. Upon landing, the extinguishers spray dry powder, providing a solution for high-rise firefighting.

[0003] To achieve the electromagnetic railgun-launched fire extinguisher described above, the following issues need to be addressed:

[0004] 1) The fire extinguisher has a structural strength capable of withstanding high overloads, generally requiring at least 1000g or even 2000g of high overload;

[0005] 2) It uses overload triggering during launch and has a delay function (about 5 to 10 seconds) to start spraying dry powder after the fire extinguisher lands;

[0006] 3) It has an anti-tipping function. Fire extinguishers usually tip over after being placed on the ground. Ordinary fire extinguishers can only spray a small amount of dry powder after tipping over, which is too inefficient. It is necessary to increase the amount of dry powder sprayed after tipping over.

[0007] Chinese patent document CN 206910633 U discloses a long-range dry powder fire extinguishing projectile, comprising a launch tube and a projectile. The launch tube is made of fiberglass material, and has two pull rings on its upper surface with a strap between them for easy carrying. A sight is located on the surface of the launch tube between the pull rings. The projectile is housed in a ejection cavity within the launch tube, and has a propulsion end at its tail. An ignition device is located inside the tail end of the launch tube and is electrically connected to a switch handle located on the lower side of the launch tube. The switch handle is electrically connected to a battery located at the tail end of the launch tube. A protective frame is located outside the switch handle, and a handle is vertically located on the lower side of the launch tube to the right of the protective frame. This document eliminates the drawbacks of existing portable dry powder fire extinguishers and improves the safety of existing fire extinguishing devices; however, it does not solve the three problems mentioned above. Summary of the Invention

[0008] The purpose of this invention is to provide a high overload dry powder fire extinguisher and its usage method to overcome the problem that existing fire extinguishers cannot simultaneously possess the ability to withstand high overload, a time delay function, and an anti-tipping function.

[0009] Therefore, the present invention provides a high overload dry powder fire extinguisher, including a control valve and a dry powder storage tank. The control valve includes a trigger valve, a cylinder head, a cylinder, a mounting base, an inflation valve, and a push-pull assembly. The cylinder head, cylinder, and mounting base are connected sequentially from top to bottom. The trigger valve and inflation valve are respectively provided on the top of the cylinder head. A powder outlet is provided on the side of the mounting base. The push-pull assembly is internally connected to the cylinder and the mounting base. The dry powder storage tank includes a moving part and a tank body. The moving part is connected to the tank body. The dry powder storage tank below the moving part is filled with dry powder. The upper part of the moving part is internally connected to the lower end of the mounting base. An inflation valve is provided on the top of the tank body.

[0010] Preferably, the trigger valve includes a horizontal rod and a vertical rod. The horizontal rod is horizontally arranged, and the right end of the horizontal rod is vertically connected to the vertical rod. The lower end of the vertical rod is connected to the cylinder head. The horizontal rod has a channel 1 extending from right to left along its horizontal central axis, and the left end of channel 1 does not extend beyond the left end of the horizontal rod. The vertical rod has a channel 2 extending along its central axis. The horizontal rod and the vertical rod are connected as one unit, and channel 1 and channel 2 are connected.

[0011] Preferably, the diameter of the right side of the crossbar is smaller than the diameter of the left side.

[0012] Preferably, the push-pull assembly includes a piston, a first spring, a bearing, a second spring, and a sealing rod. The piston includes a horizontal plug and a vertical plug. The horizontal plug is vertically connected to the lower center of the vertical plug. The horizontal plug is connected to the cylinder. The upper part of the vertical plug is sleeved with the first spring. A vertical hole is opened axially upward in the center of the vertical plug. The upper part of the sealing rod is connected to the lower part of the vertical hole. The outer side of the sealing rod is sleeved with the bearing and the second spring from top to bottom, and the upper part of the bearing is connected to the lower end face of the vertical plug.

[0013] Preferably, the moving component includes a gravity plate, a partition plate, and a central tube. The central tube is vertically connected to the central axis of the tank, and the upper end of the central tube is higher than the top of the tank. The gravity plate and the partition plate are sequentially sleeved between the lower end of the central tube and the tank from top to bottom.

[0014] Preferably, the gravity plate is annular in shape, with a notch on the outer side of the annulus along the circumferential direction.

[0015] Preferably, the partition is circular in shape and has multiple partition holes that are evenly spaced and circumferentially distributed.

[0016] Preferably, the arc length of the notch along the circumferential direction is greater than the arc length between three adjacent partition holes, and the distance between the arc shape inside the notch and the central axis of the central tube is less than the distance between the partition hole and the central axis of the central tube.

[0017] Preferably, the moving component further includes a stopper block, which is connected to the underside of each partition hole.

[0018] A method of using a high-overload dry powder fire extinguisher according to any one of the claims, wherein the fire extinguisher is stored by the following steps: the canister is filled with dry powder and high-pressure gas with the high-pressure gas above the dry powder; gas is charged into the cylinder through the charging valve, the gas compression piston moves downward, the piston compresses spring one and spring two, spring two compresses the sealing rod to seal the gas inside the canister, thus completing the storage of the fire extinguisher;

[0019] When a fire extinguisher is fired, the following steps are involved: At the moment of firing, the right side of the trigger valve's crossbar breaks, and the gas in the cylinder is discharged through channel two and channel one. When the gas pressure in the cylinder is less than the compression pressure of spring one and spring two, spring one and spring two return to their original positions, the sealing rod is no longer squeezed by spring two, and the gas in the canister discharges the dry powder through the central tube from the powder outlet.

[0020] When the fire extinguisher canister is tilted, the following steps are involved: When the canister is tilted, the gravity plate rotates, and the gas inside the canister enters the dry powder area through the partition hole at the notch. The gas then discharges the dry powder through the central tube from the powder outlet.

[0021] The beneficial effects of this invention are:

[0022] 1. The high overload dry powder fire extinguisher and its usage method provided by the present invention include a control valve and a dry powder storage tank. The control valve includes a trigger valve, a cylinder head, a cylinder, a mounting base, an inflation valve, and a push-pull assembly. It has a simple structure and the control valve is an axially rotating body, which can resist axial high overload.

[0023] 2. The high overload dry powder fire extinguisher and its usage method provided by this invention control the cylinder size, control the amount of filling from the first filling valve into the cylinder, thereby controlling the cylinder pressure, and control the orifice size of the first and second channels in the trigger valve to control the exhaust time, thereby changing the control valve to control the powder spraying delay time of the tank.

[0024] 3. The high overload dry powder fire extinguisher and its usage method provided by this invention have a notch on the outer side of the gravity plate ring along the circumferential direction, and multiple partition holes on the partition plate. The multiple partition holes are evenly distributed circumferentially. When the tank is tilted, the gravity plate rotates, and the gas in the tank enters the dry powder area through the partition holes at the notch. The gas discharges the dry powder through the central tube from the powder outlet, so that the tank can spray out most of the dry powder when tilted. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Figure 1 This is a front structural view of a high overload dry powder fire extinguisher;

[0027] Figure 2 This is a cross-sectional view of a high overload dry powder fire extinguisher.

[0028] Figure 3 yes Figure 2 Enlarged view of the structure of the control valve;

[0029] Figure 4 yes Figure 2 Enlarged structural diagram of a medium-density dry powder storage tank;

[0030] Figure 5 This is a top view of the gravity plate structure;

[0031] Figure 6 This is a top view of the partition structure;

[0032] Figure 7 This is a top view of the gravity plate shielding partition.

[0033] Explanation of reference numerals in the attached diagram: 1. Control valve; 1-1. Trigger valve; 1-101. Horizontal rod; 1-102. Vertical rod; 1-103. Channel 1; 1-104. Channel 2; 1-2. Sealing ring 1; 1-3. Cylinder head; 1-4. Inflation valve 1; 1-5. Sealing ring 2; 1-6. Cylinder; 1-7. Piston; 1-8. Piston Y-type sealing ring; 1-9. Sealing ring 3; 1-71. Horizontal plug; 1-72. Vertical plug; 1-73. Vertical hole; 1-10. Spring 1; 1-11. Bearing; 1-12. Spring 2; 1-13. Sealing rod; 1-14. Mounting base; 1-141. Powder outlet; 1-15. Sealing ring 4; 2. Dry powder storage tank; 2-1. Tank body; 2-2. Gravity plate; 2-21. Notch; 2-3. Baffle; 2-31. Baffle hole; 2-4. Inflation valve II; 2-5. Central tube; 2-6. Plug. Detailed Implementation

[0034] Example 1:

[0035] like Figures 1-4 As shown, a high overload dry powder fire extinguisher includes a control valve 1 and a dry powder storage tank 2. The control valve 1 includes a trigger valve 1-1, a cylinder head 1-3, a cylinder 1-6, a mounting base 1-14, an inflation valve 1-4, and a push-pull assembly. The cylinder head 1-3, cylinder 1-6, and mounting base 1-14 are connected sequentially from top to bottom. The trigger valve 1-1 and the inflation valve 1-4 are respectively provided on the top of the cylinder head 1-3. A powder outlet 1-141 is provided on the side of the mounting base 1-14. The push-pull assembly is connected inside the cylinder 1-6 and the mounting base 1-14. The dry powder storage tank 2 includes a moving part and a tank body 2-1. The moving part is connected inside the tank body 2-1. The dry powder storage tank 2 below the moving part is filled with dry powder. The upper part of the moving part is connected to the lower end of the mounting base 1-14. The inflation valve 2-4 is provided on the top of the tank body 2-1.

[0036] With a simple structure, the control valve 1 is an axially rotating body, which can resist high axial overload.

[0037] Specifically, inflation valve 1-4 and inflation valve 2-4 are both one-way inflation valves to ensure inflation and prevent leakage.

[0038] Example 2:

[0039] Based on Embodiment 1, the trigger valve 1-1 includes a horizontal rod 1-101 and a vertical rod 1-102. The horizontal rod 1-101 is horizontally arranged, and the right end of the horizontal rod 1-101 is vertically connected to the vertical rod 1-102. The lower end of the vertical rod 1-102 is connected to the cylinder head 1-3. The horizontal rod 1-101 has a channel 1-103 extending from right to left along its horizontal central axis, and the left end of the channel 1-103 does not extend beyond the left end of the horizontal rod 1-101. The vertical rod 1-102 has a channel 2 1-104 extending along its central axis. The horizontal rod 1-101 and the vertical rod 1-102 are connected as one unit, and the channel 1-103 and the channel 2 1-104 are connected.

[0040] When in use, at the moment the fire extinguisher is fired by the electromagnetic gun, under high overload, the crossbar 1-101 of the trigger valve 1-1 (with a small diameter that allows it to break under overload) breaks. The gas in cylinder 1-6 is then discharged outward through channel 1-103 and channel 2-104. By controlling the size of cylinder 1-6, by controlling the amount of gas supplied from the charging valve 1-4 to cylinder 1-6, the pressure inside cylinder 1-6 is controlled. Furthermore, by controlling the orifice size of channel 1-103 and channel 2-104 in trigger valve 1-1, the exhaust time is controlled, thereby changing the delay time of powder spraying from the control valve into the tank.

[0041] Preferably, the diameter of the right side of the crossbar 1-101 is smaller than the diameter of the left side. This structure ensures that it can easily break under overload.

[0042] Preferably, the cylinder head 1-3 has a vertical rod hole and an inflation hole 1. Channel 2 1-104 communicates with the vertical rod hole, and inflation valve 1-4 is connected to inflation hole 1. This ensures that trigger valve 1-1 and inflation valve 1-4 are connected to cylinder 1-6, facilitating the injection of gas into cylinder 1-6 from inflation valve 1-4. Simultaneously, after the crossbar 1-101 is disconnected, it facilitates the discharge of gas from cylinder 1-6 through channel 2 1-104. The structure is simple.

[0043] Example 3:

[0044] Based on Embodiment 2, the push-pull assembly includes a piston 1-7, a spring 1-10, a bearing 1-11, a spring 1-12, and a sealing rod 1-13. The piston 1-7 includes a horizontal plug 1-71 and a vertical plug 1-72. The vertical plug 1-72 is vertically connected to the center of the horizontal plug 1-71. The horizontal plug 1-71 is connected to the cylinder 1-6. The upper part of the vertical plug 1-72 is sleeved with the spring 1-10. A vertical hole 1-73 is opened axially in the center of the vertical plug 1-72. The upper part of the sealing rod 1-13 is connected to the lower part of the vertical hole 1-73. The outer side of the sealing rod 1-13 is sleeved with the bearing 1-11 and the spring 1-12 from top to bottom, and the upper part of the bearing 1-11 is connected to the lower end face of the vertical plug 1-72.

[0045] The working principle of a fire extinguisher is as follows:

[0046] Fire extinguisher storage status: The canister 2-1 contains dry powder and high-pressure gas, with the high-pressure gas positioned above the dry powder; gas is supplied to cylinder 1-6 via the charging valve 1-4, causing the gas compression piston 1-7 to move downwards, compressing springs 1-10 and 1-12 to achieve the desired effect. Figure 3 In this state, the sealing rod 1-13 is compressed by the spring 1-12, achieving gas sealing inside the tank 2-1 and completing the fire extinguisher storage.

[0047] Launch and Usage Process: At the moment the fire extinguisher is launched by the electromagnetic gun, under high overload, the right side of the crossbar 1-101 of the trigger valve 1-1 breaks. The gas in the cylinder 1-6 is discharged through channel 2 1-104 and channel 1-103. When the gas pressure in the cylinder 1-6 is less than the compression pressure of spring 1-10 and spring 2 1-12, spring 1-10 and spring 2 1-12 return to their original positions. The sealing rod 1-13 is no longer squeezed by spring 2 1-12. The gas in the tank 2-1 discharges the dry powder through the central tube 2-5 from the powder outlet 1-141.

[0048] The sealing rod 1-13 is pushed and pulled by air pressure control spring 1-10 and spring 1-12, so that the delay time is adjustable and dry powder is sprayed out after the delay. The structure is simple.

[0049] Preferably, the high-overload dry powder fire extinguisher further includes sealing ring 1-2, sealing ring 1-5, piston Y-type sealing ring 1-8, sealing ring 1-9, and sealing ring 1-15. Sealing ring 1-2 is connected between the trigger valve 1-1 and the cylinder head 1-3; sealing ring 1-5 is connected between the cylinder head 1-3 and the cylinder 1-6; piston Y-type sealing ring 1-8 is connected between the outside of the transverse plug 1-71 and the cylinder 1-6; sealing ring 1-9 is connected between the bottom of the transverse plug 1-71 and the cylinder 1-6; and sealing ring 1-15 is connected between the sealing rod 1-13 and the mounting base 1-14. This improves the overall sealing performance of the device, ensuring long-term sealing of the high-pressure gas inside the cylinder 1-6.

[0050] Preferably, the cylinder 1-6 is a cavity with a stepped cylindrical shape, the diameter of which decreases from top to bottom, and there are two steps; this facilitates the connection and sealing of the piston. The spring 1-10 is located between the transverse plug 1-71 and the bottom surface of the cylinder 1-6 (i.e., the second stage), which allows the spring 1-10 to deform through the transverse plug 1-71 and the bottom surface of the cylinder 1-6 when the high-pressure gas squeezes the transverse plug 1-71.

[0051] Preferably, the sealing rod 1-13 includes an upper sealing rod and a lower sealing rod. The lower sealing rod is horizontally positioned, and the upper sealing rod is vertically connected to the center of the lower sealing rod. A sealing hole is provided on the central axis of the upper sealing rod. The diameter of the upper sealing rod is smaller than that of the lower sealing rod, making the structure lightweight and easy to connect to the second spring 1-12. At the same time, it limits the movement of the second spring 1-12, making it easier to control the deformation of the second spring 1-12. The wider lower sealing rod can better seal the cylinder 1-6.

[0052] Preferably, the lower outer diameter of the mounting base 1-14 is smaller than the upper outer diameter, and the lower outer diameter is smaller than the outer diameter of the central tube 2-5, so as to facilitate the stable connection of the mounting base 1-14 to the central tube 2-5.

[0053] Example 4:

[0054] Based on Example 3, such as Figures 5-7 As shown, the moving component includes a gravity plate 2-2, a partition plate 2-3, and a central tube 2-5. The central tube 2-5 is vertically connected to the central axis of the tank body 2-1, and the upper end of the central tube 2-5 is higher than the top of the tank body 2-1. The gravity plate 2-2 and the partition plate 2-3 are sequentially sleeved between the lower end of the central tube 2-5 and the tank body 2-1 from top to bottom.

[0055] The central tubes 2-5 are the powder outlet tubes, which serve to dispense powder and connect the components.

[0056] Preferably, the gravity plate 2-2 is circular in shape, and a notch 2-21 is provided on the outer side of the ring along the circumferential direction.

[0057] The notch 2-21 facilitates the connection of the gravity plate 2-2 to the central tube 2-5 and allows for easy rotation. The notch 2-21 exposes part of the partition hole 2-31, allowing high-pressure gas to enter the dry powder area through the unobstructed partition hole 2-31 and spray the dry powder out from the central tube 2-5.

[0058] Preferably, a portion of the gravity plate 2-2 is thickened, and the notch 2-21 is located in the thickened area; 1 / 3 of the gravity plate 2-2 area < the area of ​​the thickened area < 1 / 2 of the gravity plate 2-2 area.

[0059] Because of its greater thickness, the center of gravity of the gravity plate is biased towards the gap. When the tank is tilted, the gravity plate will rotate, blocking other holes on the upper part of the partition plate. Only the bottom partition hole 2-31 will not be blocked. The high-pressure gas inside the tank will blow dry powder out through the unblocked partition hole 2-31.

[0060] Preferably, a deep groove ball bearing is provided at the inner circle of the gravity plate 2-2, and the gravity plate 2-2 is connected to the central tube 2-5 through the deep groove ball bearing.

[0061] To reduce frictional resistance during rotation, a deep groove ball bearing is installed at the central hole of the gravity plate to allow for flexible rotation.

[0062] Preferably, the partition 2-3 is annular in shape, and the partition 2-3 has a plurality of partition holes 2-31, which are circumferentially distributed at equal intervals.

[0063] This facilitates the connection of the partition 2-3 to the central tube 2-5, and ensures that no matter how the gravity plate 2-2 rotates, some of the partition holes 2-31 will not be blocked, so that the high-pressure gas can enter the dry powder area through the unblocked partition holes 2-31 and spray the dry powder out from the central tube 2-5.

[0064] Preferably, the circumferential arc length of the notch 2-21 is greater than the arc length between the three adjacent partition holes 2-31, and the distance between the inner arc of the notch 2-21 and the central axis of the central tube 2-5 is less than the distance between the partition hole 2-31 and the central axis of the central tube 2-5.

[0065] Improve powder output efficiency.

[0066] Preferably, the moving component further includes a plugging block 2-6, which is connected to the underside of each partition hole 2-31.

[0067] To prevent the fire extinguisher storage tank from tipping over or overturning during routine transportation, causing dry powder to enter from the bottom to the top, a sealing block 2-6 is installed at each of the partition holes 2-31. This block can seal the partition holes 2-31, but when the control valve is opened, it can be blown open by the airflow without affecting the high-pressure air blowing out the dry powder. Specifically, the sealing block 2-6 is a rubber round block.

[0068] Example 5:

[0069] A method of using a high-overload dry powder fire extinguisher according to any one of the claims, wherein the fire extinguisher is stored as follows: the canister 2-1 is filled with dry powder and high-pressure gas, with the high-pressure gas positioned above the dry powder; gas is introduced into the cylinder 1-6 through the inflation valve 1-4, the gas compression piston 1-7 moves downward, the piston 1-7 compresses the spring 1-10 and the spring 1-12, the spring 1-12 compresses the sealing rod 1-13 to seal the gas inside the canister 2-1, thus completing the storage of the fire extinguisher;

[0070] When the fire extinguisher is fired, the following steps are included: At the moment of firing, the right side of the crossbar 1-101 of the trigger valve 1-1 breaks, and the gas in the cylinder 1-6 is discharged through the second channel 1-104 and the first channel 1-103. When the gas pressure in the cylinder 1-6 is less than the compression pressure of the first spring 1-10 and the second spring 1-12, the first spring 1-10 and the second spring 1-12 return to their original positions, the sealing rod 1-13 is no longer squeezed by the second spring 1-12, and the gas in the tank 2-1 discharges the dry powder through the central tube 2-5 from the powder outlet 1-141.

[0071] When the fire extinguisher canister is tilted, the following steps are included: When the canister 2-1 is tilted, the gravity plate 2-2 rotates, and the gas in the canister 2-1 enters the dry powder area through the partition hole 2-31 at the notch 2-21. The gas then discharges the dry powder through the central tube 2-5 from the powder outlet 1-141.

[0072] This invention has a simple structure and is axially resistant to high overload; it is triggered by high overload and sprays dry powder with a delay time that is adjustable; the tank can spray out most of the dry powder when tilted.

[0073] In the description of this invention, it should be understood that if terms such as "left," "inner," or "right" indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention.

[0074] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A high-overload launchable dry chemical fire extinguisher characterized by: The application relates to a control valve (1) and a dry powder storage tank (2), the control valve (1) comprises a trigger valve (1-1), a cylinder cover (1-3), a cylinder (1-6), a mounting seat (1-14), an air charging valve (1-4) and a push-pull assembly, the cylinder cover (1-3), the cylinder (1-6) and the mounting seat (1-14) are sequentially connected from top to bottom, the upper surface of the cylinder cover (1-3) is respectively provided with the trigger valve (1-1) and the air charging valve (1-4), the side surface of the mounting seat (1-14) is provided with a powder outlet (1-141), the inside of the cylinder (1-6) and the mounting seat (1-14) is connected with the push-pull assembly; the dry powder storage tank (2) comprises a moving part and a tank body (2-1), the inside of the tank body (2-1) is connected with the moving part, the inside of the dry powder storage tank (2) below the moving part is filled with dry powder, the upper part of the moving part is connected with the lower end of the mounting seat (1-14), the upper surface of the tank body (2-1) is provided with an air charging valve (2-4); the moving part comprises a gravity plate (2-2), a partition plate (2-3) and a central pipe (2-5), the central pipe (2-5) is vertically connected to the central axis of the tank body (2-1) and the upper end surface of the central pipe (2-5) is higher than the upper surface of the tank body (2-1), the lower end of the central pipe (2-5) is sequentially sleeved with the gravity plate (2-2) and the partition plate (2-3) from top to bottom between the tank body (2-1); the gravity plate (2-2) is in the shape of a circular ring, the outer side of the circular ring is provided with a notch (2-21) in the circumferential direction; the partition plate (2-3) is in the shape of a circular ring, a plurality of partition plate holes (2-31) are formed in the partition plate (2-3), and the plurality of partition plate holes (2-31) are distributed in the circumferential direction at equal intervals; the circumferential arc length distance of the notch (2-21) is greater than the circumferential arc length distance between any three adjacent partition plate holes (2-31), and the distance between the inner arc of the notch (2-21) and the central axis of the central pipe (2-5) is less than the distance between the partition plate hole (2-31) and the central axis of the central pipe (2-5); the gravity plate (2-2) is partially thickened, the notch (2-21) is located in the thickened area, and the area of 1 / 3 of the gravity plate (2-2) is less than the area of the thickened area and less than the area of 1 / 2 of the gravity plate (2-2).

2. A high overpack launch dry chemical fire extinguisher as claimed in claim 1 wherein: The trigger valve (1-1) comprises a horizontal rod (1-101) and a vertical rod (1-102), the horizontal rod (1-101) is horizontally arranged, the right end of the horizontal rod (1-101) is vertically and downwardly connected with the vertical rod (1-102), the lower end of the vertical rod (1-102) is connected with the cylinder cover (1-3), a channel one (1-103) is formed in the horizontal central axis of the horizontal rod (1-101) from right to left, the left end of the channel one (1-103) does not pass through the left end of the horizontal rod (1-101), a channel two (1-104) is formed in the central axis of the vertical rod (1-102), and the horizontal rod (1-101) and the vertical rod (1-102) are connected into one body and the channel one (1-103) and the channel two (1-104) are communicated.

3. A high overpressure discharge dry chemical fire extinguisher as defined in claim 2 wherein: The right part of the horizontal rod (1-101) has a smaller diameter than the left part.

4. A high overpack launch dry chemical fire extinguisher as defined in claim 3 wherein: The push-pull assembly comprises a piston (1-7), a spring I (1-10), a bearing (1-11), a spring II (1-12) and a sealing rod (1-13), the piston (1-7) comprises a horizontal plug (1-71) and a vertical plug (1-72), the horizontal plug (1-71) is vertically connected with the vertical plug (1-72) at the center lower part of the horizontal plug (1-71), the horizontal plug (1-71) is connected in a cylinder (1-6), the spring I (1-10) is sleeved on the outer upper part of the vertical plug (1-72), a vertical hole (1-73) is formed in the center axis of the vertical plug (1-72) upward, the lower part of the vertical hole (1-73) is connected with the upper part of the sealing rod (1-13), the bearing (1-11) and the spring II (1-12) are sequentially sleeved on the outer side of the sealing rod (1-13) from top to bottom, and the upper surface of the bearing (1-11) is connected with the lower end surface of the vertical plug (1-72).

5. A high overpack launch dry chemical fire extinguisher as defined in claim 3 wherein: The moving part further comprises a plug block (2-6), and the lower part of each partition hole (2-31) is connected with the plug block (2-6).

6. A use method of the high-overload dry powder fire extinguisher based on any one of claims 4-5, characterized in that: When the fire extinguisher is stored, the following steps are included: the tank (2-1) is filled with dry powder and high-pressure gas, and the high-pressure gas is located above the dry powder; the cylinder (1-6) is filled with gas through the inflation valve I (1-4), the gas compression piston (1-7) moves downward, the piston (1-7) compresses the spring I (1-10) and the spring II (1-12), the spring II (1-12) compresses the sealing rod (1-13) to seal the gas in the tank (2-1), and the storage of the fire extinguisher is completed; When the fire extinguisher is launched, the following steps are included: the right part of the horizontal rod (1-101) of the trigger valve (1-1) breaks at the launching moment, the gas in the cylinder (1-6) is discharged through the channel II (1-104) and the channel I (1-103), when the gas pressure in the cylinder (1-6) is less than the compression pressure of the spring I (1-10) and the spring II (1-12), the spring I (1-10) and the spring II (1-12) recover, the sealing rod (1-13) is not pressed by the spring II (1-12), and the gas in the tank (2-1) discharges the dry powder from the powder outlet (1-141) through the central pipe (2-5); When the fire extinguisher tank is poured, the following steps are included: when the tank (2-1) is poured, the gravity plate (2-2) rotates, the gas in the tank (2-1) enters the dry powder area from the partition hole (2-31) at the gap (2-21), and the gas discharges the dry powder from the powder outlet (1-141) through the central pipe (2-5).

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