Efficient forest fire extinguishing method and cable-like fire extinguishing apparatus

Abstract

An efficient forest fire extinguishing method and a cable-like fire extinguishing apparatus, using the fire extinguishing principle of blasting shock waves instantly producing fine water mist from a water-based fire extinguishant. The cable-like fire extinguishing apparatus is placed at an appropriate position along a fire advancing direction ahead of the line of a forest fire, and blasted at suitable timing according to fire conditions. Blasting shock waves are employed to instantly produce a jet of fine water mist from a water-based fire extinguishing composition, to block ingress of air, cover combustible material, achieve rapid cooling, and terminate the chain reaction of burning radicals, thereby extinguishing the forest fire at a section using both physical and chemical fire extinguishing means. The water-based fire extinguishing composition adheres to vegetation so as to wet and cool the vegetation, such that the vegetation does not burn again easily, and a fire extinguishing isolation zone is formed to extinguish residual fire on the inner side of the line of the fire. The invention can perform rapid, accurate and efficient extinguishing of different forest fires, improve forest fire extinguishing efficiency and safety, significantly reduce the investment of fire extinguishing personnel and equipment, reduce fire extinguishing costs and be used flexibly and conveniently, and is suitable for broad promotion and application.

Description

A high-efficiency forest fire extinguishing method and rope-shaped fire extinguishing device Technical Field

[0001] The present invention relates to the technical field of forest fire extinguishing, and in particular to a high-efficiency forest fire extinguishing method and a rope-shaped fire extinguishing device. Background Art

[0002] Forest fires are sudden, destructive, and challenging natural disasters. They cause severe damage to forests and are the leading cause of forest destruction among the three major natural disasters. They not only threaten people's lives and property, inflict significant economic losses, but also damage the ecological environment. With the continued advancement of barren hillside afforestation efforts, forest coverage has gradually increased, and the amount of combustible materials within forests has steadily increased. Coupled with increasingly severe climatic conditions, forest fires are a frequent occurrence, placing increasing pressure on forest fire prevention and control. Existing ground-based firefighting equipment is not only inefficient but also extremely difficult to extinguish high-intensity forest fires several meters high, resulting in casualties. Existing methods of spraying fire extinguishing agents from aircraft are constrained by water availability, geographical environment, and climatic conditions. This leads to high investment, high costs, and low firefighting efficiency, making it difficult to apply in many situations. To address the shortcomings of existing forest firefighting methods and equipment, it is imperative to research and develop rapid, precise, efficient, safe, and low-cost forest firefighting methods and equipment, and to build a more efficient and professional forest firefighting system.

[0003] Summary of the Invention

[0004] The present invention discloses a highly efficient forest fire extinguishing method and a rope-shaped fire extinguishing device. The highly efficient forest fire extinguishing method of the present invention comprises the following steps: arranging rope-shaped fire extinguishing devices at appropriate locations in front of the fire line in the direction of ignition, and selecting a layout of the rope-shaped fire extinguishing devices based on the specific fire situation; detonating the rope-shaped fire extinguishing devices when the majority of the fire in the forest fire line has burned into the range covered by the blasting shock wave of the arranged rope-shaped fire extinguishing devices; the blasting shock wave causes the water-based fire extinguishing composition contained in the rope-shaped fire extinguishing devices to instantly produce hundreds of millions of extremely fine water droplets, forming a long, several-meter-high dragon of fine water mist to block air ingress; simultaneously, the water-based fire extinguishing composition covers the burning vegetation and adheres to the vegetation, moistening and cooling it, terminating the chain reaction of the combustion base, and instantly extinguishing the forest fire in that section through both physical and chemical extinguishing effects; the water-based fire extinguishing composition's adhesion to the vegetation and moistening and cooling it prevents it from reigniting, thereby forming a fire extinguishing isolation zone to extinguish the remaining fire within the fire line.

[0005] The invention discloses a rope-shaped fire extinguishing device for a highly efficient forest fire extinguishing method. The device comprises a high-strength flame-retardant plastic hose with a built-in detonating cord and a relatively thin, thick-walled outer jacket. One end of the hose is sealed. The hose is arranged at an appropriate position in front of the ignition direction of the forest fire line. At the other end, the space between the detonating cord and the hose is filled with a water-based forest fire extinguishing composition. After the detonating cord is drawn out, the hose head is sealed. The detonating cord is then connected to an electric detonator and a detonator to form the rope-shaped fire extinguishing device.

[0006] Furthermore, the detonating cord of the cord-shaped fire extinguishing device comprises a core powder, a cotton thread and a moisture-proof material wrapped and plastic-coated cord-shaped detonating device capable of transmitting a detonation wave after detonation;

[0007] The detonating cord core powder consists of RDX and TNT, the ratio of RDX to TNT is 8-6:2-4, and the cord-shaped fire extinguishing device does not generate secondary combustion after explosion.

[0008] Furthermore, the flame retardant plastic hose has a diameter of 45 mm to 100 mm, a wall thickness of 0.1 mm to 0.3 mm, and a flame retardant grade of UL94 standard V-0.

[0009] Furthermore, the water-based forest fire extinguishing composition filled in the rope-shaped fire extinguishing device is a water-based fire extinguishing agent that is non-toxic, can be naturally degraded in a short time, and is conducive to vegetation recovery.

[0010] Furthermore, the rope-shaped fire extinguishing device adopts long-distance pumping to fill the water-based forest fire extinguishing composition, so that the rope-shaped fire extinguishing device is easy to arrange.

[0011] Furthermore, after the rope-shaped fire extinguishing device is detonated, the detonation spray width of the water-based forest fire extinguishing composition is 8m to 30m, preferably 15m to 25m.

[0012] The beneficial effects of adopting the above technical solution are:

[0013] 1. For high-intensity forest fires such as surface fires and crown fires over 1.5 meters in diameter, direct firefighting is extremely difficult and can easily cause casualties. Rope-shaped fire extinguishing devices are placed at appropriate locations and detonated at appropriate times. The highly efficient water-based forest fire extinguishing composition is exploded into hundreds of millions of extremely fine water droplets, forming a long dragon of fine water mist several meters high that blocks the air, instantly covers the burning material, rapidly cools it down, and terminates the chain reaction of the combustion base. The dual physical and chemical fire extinguishing effects instantly extinguish the forest fire in that section, achieving rapid, accurate, efficient, and safe fire extinguishing.

[0014] 2. The high-efficiency water-based forest fire extinguishing composition's adhesion to vegetation and its moistening and cooling properties make it difficult for extinguished forest fires to reignite, and can form a fire extinguishing isolation zone for residual fires, thereby controlling the spread of fire;

[0015] 3. The rope-shaped fire extinguishing device is filled with a high-efficiency water-based forest fire extinguishing composition by remote pumping, making the rope-shaped fire extinguishing device easy to deploy and capable of being connected in pairs or more. Multiple rope-shaped fire extinguishing devices can be detonated simultaneously, greatly improving the efficiency of forest fire extinguishing.

[0016] 4. By adopting different rope-shaped fire extinguishing device arrangements for surface fires, underground fires, and crown fires, it can flexibly achieve rapid, precise, and efficient fire extinguishing of different forest fires, greatly reducing the investment in firefighting personnel and equipment, improving forest fire extinguishing efficiency, and reducing firefighting costs;

[0017] 5. The use of water-based forest fire extinguishing compositions has the advantages of high fire prevention and extinguishing, not easy to reignite, non-toxic, non-irritating, and can be naturally degraded in a short time, which is beneficial to vegetation recovery and water and soil conservation. DETAILED DESCRIPTION

[0018] A rope-shaped fire extinguishing device for an efficient forest fire extinguishing method comprises a high-strength flame-retardant plastic hose with a built-in detonating cord and a relatively thin, thick-walled outer jacket. One end of the hose is sealed. The hose is arranged at an appropriate position in front of the fire direction along the forest fire line. At the other end, the space between the detonating cord and the hose is filled with a water-based forest fire extinguishing composition. After the detonating cord is drawn out, the hose head is sealed. The detonating cord is then connected to an electric detonator and a detonator to form the rope-shaped fire extinguishing device.

[0019] The detonating cord of the rope-shaped fire extinguishing device comprises a core powder, a rope-shaped detonating device wrapped with cotton thread and moisture-proof material and coated with plastic, and capable of transmitting a detonation wave after detonation;

[0020] The detonating cord core powder consists of RDX and TNT, the ratio of RDX to TNT is 8-6:2-4, and the cord-shaped fire extinguishing device does not generate secondary combustion after explosion.

[0021] The outer diameter of the detonating cord core is 5mm to 9mm, preferably 6mm to 8mm; the weight of the detonating cord is 45g / m to 100g / m, preferably 55g / m to 80g / m; the length of the detonating cord is 50m to 200m, preferably 80m to 150m; the detonation velocity of the detonating cord is 4500m / s to 6500m / s, preferably 5000m / s to 6000m / s.

[0022] The water resistance of the detonating cord: after the detonating cord is immersed in 0.5m deep water for 2 hours, its explosion sensing and explosion transmission performance should still meet the requirements.

[0023] The flame retardant plastic hose of the detonating cord jacket of the rope-shaped fire extinguishing device has a diameter of 45mm to 100mm, preferably 60mm to 80mm; the hose wall thickness is 0.1mm to 0.3mm, preferably 0.1mm to 0.2mm, and the flame retardant grade is UL94 standard V-0.

[0024] The fire extinguishing composition of the rope-shaped fire extinguishing device is filled in the space between the detonating cord and the plastic hose, with a filling amount of 1.5L / m to 8L / m, preferably 3L / m to 5L / m.

[0025] After the rope-shaped fire extinguishing device is detonated, the detonation spray width of the water-based forest fire extinguishing composition is 8m to 30m, preferably 15m to 25m.

[0026] Preferably, electric detonators are used to initiate the detonating cord.

[0027] Preferably, detonation is carried out using an initiator.

[0028] The water-based forest fire extinguishing composition filled in the rope-shaped fire extinguishing device is a water-based fire extinguishing agent that is non-toxic, can be naturally degraded in a short time, and is beneficial to vegetation recovery.

[0029] The rope-shaped fire extinguishing device is filled with a water-based forest fire extinguishing composition by remote pumping, so that the rope-shaped fire extinguishing device is easy to arrange.

[0030] Performance of rope fire extinguishing device:

[0031] ① Explosion transmission performance: After two or more rope-shaped fire extinguishing devices are connected by a sailor knot and filled with a high-efficiency water-based forest fire extinguishing composition, all No. 8 detonators can still be detonated;

[0032] ② Heat resistance: When the temperature is 50±2℃ without fire extinguishing composition, the No. 8 detonator can still be fully detonated after three one-meter-long rope-shaped fire extinguishing devices are connected with a sailor knot after being kept warm for 24 hours;

[0033] ③ Cold resistance: When the fire extinguishing composition is not filled and the temperature is kept at -40±2℃ for 24 hours, the No. 8 detonator of the rope-shaped fire extinguishing device can still detonate completely after the bending test;

[0034] ④ Anti-seismic performance: When not filled with fire extinguishing composition, the vibration frequency is 60±1 / min, the amplitude is 150mm, and the vibration time is 30min. The rope-shaped fire extinguishing device does not explode or burn, and the detonation and explosion transmission are normal.

[0035] ⑤Tensile performance: The rope-shaped fire extinguishing device will completely detonate after being subjected to a tensile force of 500N when not filled with the fire extinguishing composition;

[0036] ⑥ Gunfire sensitivity: When the gun is not filled with fire extinguishing composition, 10 shots will not explode or burn at a distance of 30m, ensuring safety in transportation and use.

[0037] ⑦ Two or more sailor knots can be connected (lap length ≮150mm), and multiple ones can be detonated simultaneously;

[0038] Example 1

[0039] Select wind force below level 3, in the wind forward direction, with vegetation height of about 1.5m and length of 45m, and arrange the rope fire extinguishing device in a U-shape on the surface of the vegetation. The detonating cord core uses RDX and TNT in a ratio of 7:3, the core outer diameter is 5.5mm, the weight is 50g / m, and the detonation velocity is 6000m / s; the outer plastic tube has a wall thickness of 0.12mm, a diameter of 56mm, a length of 50m, and one end is sealed; the other end is filled with 75L of high-efficiency water-based forest fire extinguishing composition, and after the detonating cord is drawn out, the tube head is sealed, and the detonating cord is connected to No. 8 electric detonator and detonator to form a rope fire extinguishing device; gasoline is sprinkled on the vegetation in the U-shaped arrangement of the rope fire extinguishing device and ignited at multiple points simultaneously. After 2 minutes, the flame height is about 3.5m. The rope fire extinguishing device is detonated and the fire is completely extinguished. The detonation spray width of the fire extinguishing composition is about 9m and the height is about 5m. After 10 minutes, the vegetation does not reignite.

[0040] Example 2

[0041] Select wind force 3-4, and in the wind direction, on the trunk of a tree with a height of about 12m and a length of 40m, use a nail gun to hang the rope-shaped fire extinguishing device on the trunk at a height of about 3m through the nail card. The detonating cord core uses RDX and TNT in a ratio of 6.5:3.5, with an outer diameter of 6.5mm, a weight of 70g / m, and a detonation velocity of 5600m / s; the outer plastic tube has a wall thickness of 0.125mm, a diameter of 70mm, a length of 50m, and one end is sealed; on the other end, The end-to-end tube was filled with 190L of a high-efficiency water-based forest fire extinguishing composition. After the detonating cord was drawn out, the tube head was sealed, and the detonating cord was connected to a No. 8 electric detonator and a detonator to form a rope-shaped fire extinguishing device. Gasoline was sprinkled on the vegetation within the U-shaped arrangement of the rope-shaped fire extinguishing device and ignited simultaneously at multiple points. After 2 minutes, the flame height was about 15m. The rope-shaped fire extinguishing device was detonated and the fire was completely extinguished. The detonation spray width of the fire extinguishing composition was about 18m and the height was about 12m. After 10 minutes, the vegetation did not reignite.

[0042] Example 3

[0043] Select wind force 4-5, in the wind forward direction, with vegetation height of about 20m and length of 80m. Arrange two rope-shaped fire extinguishing devices side by side with an interval of 6m in a U-shape on the surface. The detonating cord core uses RDX and TNT in a ratio of 7:3, with an outer diameter of 9mm, a weight of 100g / m, and a detonation velocity of 6000m / s. The outer plastic tube has a wall thickness of 0.13mm, a diameter of 100mm, a length of 100m, and is sealed at one end. Fill the tube with high-efficiency water-based explosives at the other end. The forest fire extinguishing composition 780L was used. After the detonating cord was drawn out, the pipe head was sealed, and the detonating cord was connected to the No. 8 electric detonator and the detonator to form a rope-shaped fire extinguishing device. Gasoline was sprinkled on the vegetation within the U-shaped arrangement of the rope-shaped fire extinguishing device and ignited at multiple points simultaneously. After 3 minutes, the flame height was about 23m. The two rope-shaped fire extinguishing devices were detonated at the same time, and the fire was completely extinguished. The detonation spray width of the fire extinguishing composition was about 48m, and the height was about 20m. After 10 minutes, the vegetation did not reignite.

[0044] The above description is merely the principle and technical solution of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made to the above technical solution based on the technical essence of the principle of the present invention shall be included in the scope of protection of the principle and technical solution of the present invention. Industrial Applicability:

[0045] The present invention targets high-intensity forest fires such as surface fires and crown fires, and can achieve rapid, precise, efficient and safe fire extinguishing, form a fire extinguishing isolation zone for residual fires, control the spread of fire, greatly improve forest fire extinguishing efficiency, reduce the investment in fire extinguishing personnel and equipment, and reduce fire extinguishing costs.

Claims

1. An efficient forest fire extinguishing method, characterized in that: The following steps are involved: ① Arrange the rope-shaped fire extinguishing device at an appropriate position in front of the fire direction along the forest fire line, and select the layout method of the rope-shaped fire extinguishing device according to the specific fire situation; ② When most of the fire in the forest fire line has burned to the range covered by the blast shock wave of the deployed rope-shaped fire extinguishing device, detonate the rope-shaped fire extinguishing device; ③ The blast shock wave causes the water-based forest fire extinguishing composition in the rope-shaped fire extinguishing device to instantly produce hundreds of millions of extremely fine water droplets, forming a long dragon of fine water mist several meters high to block the entry of air, cover the burning objects, quickly cool down, terminate the chain reaction of the combustion base, and instantly extinguish the forest fire in this section with the dual physical and chemical fire extinguishing effects; ④ The water-based forest fire extinguishing composition adheres to the vegetation and moistens and cools it, making it less likely to reignite, forming a fire extinguishing isolation zone to extinguish the residual fire inside the fire line.

2. A rope-shaped fire extinguishing device for an efficient forest fire extinguishing method according to claim 1, characterized in that: A built-in detonating cord is used, which is covered with a thin-walled, high-strength flame-retardant plastic hose, and one end of the hose is sealed; after being arranged at an appropriate position in front of the ignition direction of the forest fire line, the space between the detonating cord and the hose at the other end is filled with a water-based forest fire extinguishing composition, and after the detonating cord is led out, the hose head is sealed, and the detonating cord is connected to an electric detonator and a detonator to form a cord-shaped fire extinguishing device.

3. The rope-shaped fire extinguishing device according to claim 2, characterized in that: The detonating cord of the rope-shaped fire extinguishing device comprises a core charge, a rope-shaped detonating device wrapped with cotton thread and moisture-proof material and coated with plastic, and capable of transmitting a detonation wave after detonation; The core drug component consists of RDX and TNT, and the ratio of RDX to TNT is 6-8:2-4.

4. The rope-shaped fire extinguishing device for the efficient forest fire extinguishing method according to claim 2 is characterized in that: The flame retardant plastic hose has a diameter of 45 mm to 100 mm, a wall thickness of 0.1 mm to 0.3 mm, and a flame retardant grade of UL94 standard V-0.

5. The rope-shaped fire extinguishing device for the efficient forest fire extinguishing method according to claim 2 is characterized in that: The water-based forest fire extinguishing composition is a water-based fire extinguishing agent that is non-toxic, can be naturally degraded in a short time, and is beneficial to vegetation recovery.

6. The rope-shaped fire extinguishing device for the efficient forest fire extinguishing method according to claim 5 is characterized in that: The rope-shaped fire extinguishing device is filled with a water-based fire extinguishing composition by long-distance pumping.

7. The rope-shaped fire extinguishing device for the efficient forest fire extinguishing method according to claim 6 is characterized in that: The water-based fire extinguishing composition has a spray width of 8m to 30m.