CN110665143B

CN110665143B - Double-insurance explosion-guiding air drop type forest fire extinguishing bomb

Info

Publication number: CN110665143B
Application number: CN201911094989.6A
Authority: CN
Inventors: 李占科; 薛鲲岳; 闫玉栋; 何一江; 常欣; 张晓敏; 吴怡; 张思佳
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2023-07-04
Anticipated expiration: 2039-11-11
Also published as: CN110665143A

Abstract

The utility model provides a double-insurance leads air drop formula forest fire extinguishing bomb that explodes, adopts regard as the contact to trigger the fuze with the ground that touches of installing at the front end of fire extinguishing bomb body detonates the device, regard as the time delay fuze with the time delay relay of installing at the rear end of fire extinguishing bomb body, has adopted "double-insurance" fire extinguishing bomb to lead to explode, has ensured the effective release dispersion and the fire extinguishing of fire extinguishing agent after the fire extinguishing bomb air drop, has avoided detonating inefficacy when the operation, can't reach the fire extinguishing effect, produces "dumb" and causes the potential safety hazard. Through multiple tests, the fire extinguishing bullet can be respectively suitable for extinguishing crown fire and surface fire, and no 'dummy bullet' is generated so far. The fire extinguishing bomb also adopts a split design, namely, the main bomb body filled with the fire extinguishing agent and the delay device are stored separately during storage and transportation, and the fire extinguishing bomb is combined before throwing, so that false detonation can be prevented, and the safety is ensured.

Description

Double-insurance explosion-guiding air drop type forest fire extinguishing bomb

Technical Field

The invention relates to the technical field of fire extinguishing bomb, in particular to an air-drop type forest fire extinguishing bomb adopting a double-insurance explosion-guiding technology.

Background

The forest of the green water Qingshan is Jin Shanyin mountain and plays an important role in national economy. However, according to incomplete statistics, the fire 7623 happens in the year of China, the forest area is 94002 hectares, and 196 people suffer from the disaster. Only between 11 months in 2018 and 2 months in 2019, a forest fire 354 co-occurred nationwide, with a forest area of about 731 hectare. The frequent occurrence of forest fires causes serious harm to the whole society, can cause water and soil loss and air pollution besides directly burning forest and plant resources under the forest and endangering wild animals, and threatens the life and property safety of people and the like.

Forest fires are highly sudden and difficult to put out, and once ground forces occur, they can hardly reach the fire scene quickly. The armored fire-extinguishing vehicle is limited by the site and is not easy to approach the fire point; the large helicopter has high cost, and the safe flight is difficult to ensure; the sea tactics using the high-pressure water mist fire extinguisher or the fire extinguishing mop are low in efficiency, the optimal fire extinguishing time is easily missed, and the life safety of firefighters is difficult to guarantee.

Based on the current situation, the unmanned aerial vehicle for forest fire extinguishment and rescue has flexible maneuvering, simple operation, safety and reliability and can realize 'inspection and extinguishment integration'. The existing air drop type forest fire extinguishing bomb matched with the fire extinguishing bomb is filled with water system/water based fire extinguishing agent, and certain gaps exist between throwing effect and fire extinguishing area compared with the dry powder fire extinguishing agent; the fixed-height ignition mechanism is independently adopted for crown fire or the ground-touching detonation mechanism is used for surface fire, so that the probability of generating a 'dummy' is high. Therefore, the trigger mode with the optimal fire extinguishing effect and higher safety coefficient is selected, and the efficient fire extinguishing of forest fires by using the onboard fire extinguishing bomb is realized.

The invention of application number 201510536499.2 provides a fire extinguishing bomb for forest crown fire. The intelligent temperature sensing control device is adopted in the invention, and the ignition signal can be output according to the set optimal fire extinguishing height within the range of 0-60m above the crown fire. The gas generator is also used for generating high-pressure gas to directly extrude the water-based extinguishing agent to act on the fire crown. According to the method, ignition and smoke generation are realized by means of the intelligent control device, the push rod is required to push the shearing component to shear the head end of the U-shaped sealing plug so as to spray the fire extinguishing agent, and the reliability is low. When the air pressure is insufficient, the fire extinguishing agent is remained and wasted, so that the fire extinguishing efficiency cannot be expected.

The invention of application number 201510534840.0 provides an efficient water mist fire extinguishing bomb for forest surface fire. The filling amount in the fire extinguishing bomb is 25L, a floor-triggered ignition mode is designed, the water-based fire extinguishing agent can be put on the surface of the ground fire, a water mist field with the height of 5 meters and the diameter of 12 meters is formed, and the ground fire can be effectively extinguished within the range of 10 square meters in the vicinity of a place. Because the fine water mist has strict requirements on the particle size of water, the water-based extinguishing agent can achieve better atomization and extinguishing effects by using the nozzle, and the extinguishing agent is accumulated and wasted only by means of explosion, so that the expected effect is difficult to achieve.

The invention of application number 201610503299.1 provides an airborne fine water mist forest fire extinguishing bomb. The principle is that columnar fine water mist cloud clusters are generated by utilizing detonation of central charge (ladder-shaped structure) of the fire extinguishing bomb to extinguish fire. The fire extinguishing bomb shell is made of thin steel plates, the charging module is composed of aluminum tubes, and the metal shell is heavy in weight and high in cost. In addition, the fire extinguishing effect of water mist generated by explosion is far inferior to that of dry powder fire extinguishing. In addition, the invention creates no description of the fire extinguishing agent filling amount, the fire extinguishing area and the detonation mode of the single extinguishing bomb.

The invention with the application number of 201821541775.X provides a double-ignition forest fire extinguishing bomb. The central blasting tube is internally provided with two sets of detonating devices, and each set of detonating device comprises a main explosive tube, a fire detonator and a delay explosive tube, and only one set of detonating device is needed to be effectively detonated when the central blasting tube is used. The detonating device has high power, but has high requirements on storage and transportation and low safety. The fire extinguishing agent mist generated during the explosion of the fire extinguishing bomb can be scattered to the periphery in a circular shape under the action of the guide wing plate, and the fire striking point is covered. The invention does not describe the fire extinguishing agent filling quantity and the fire extinguishing area of the single extinguishing bomb.

Disclosure of Invention

The invention provides a double-insurance explosion-guiding air-drop type forest fire extinguishing bomb for overcoming the defects of low reliability, high probability of generating a dead bomb, small fire extinguishing agent coverage area and poor fire extinguishing effect of the existing air-drop type forest fire extinguishing bomb for a unmanned aerial vehicle.

The invention comprises a ground-contact detonation device, a fire extinguishing bomb body, a time delay relay, an ignition wire and a lead. The fire extinguishing bomb body comprises a fire extinguishing bomb shell, a bomb tail entity, a tail wing, a powder column and a dry powder extinguishing agent. Wherein the tail body is positioned at the rear end of the fire extinguishing bullet shell, and the front end of the tail body is arranged in the fire extinguishing bullet shell; four tail fins are uniformly distributed on the circumference of the bullet tail body. The fire extinguishing bullet shell is internally filled with dry powder extinguishing agent, the powder column is arranged at the center of the fire extinguishing bullet shell, the axial direction of the powder column is parallel to the direction of the body of the fire extinguishing bullet, and the position of the powder column is fixed by the dry powder extinguishing agent filled around. The ground-contact detonation device is arranged in the center of the front end face of the fire extinguishing bomb body. The delay relay is arranged in the center of the end face of the rear end of the fire extinguishing bomb body. One end of the wire is communicated with a button contact positioned at the front end of the fire extinguishing bomb shell, and the other end of the wire is communicated with the delay relay. One end of the ignition wire is connected with the powder column, and the other end of the ignition wire is connected with the delay relay.

The ground contact blasting device comprises a button cap, a button base and a button contact. Wherein the button base is positioned in a through hole in the center of the front end face of the fire extinguishing bomb shell; the button cap is positioned outside the fire extinguishing bullet shell and is adhered to the center of the front end face of the button base; the button contact is positioned in the fire extinguishing bullet shell and is adhered to the end face of the rear end of the button base.

The button base comprises circular baffle and square connecting block. The connecting block is positioned in the center of the inner side surface of the baffle, and the external dimension of the connecting block is matched with the external dimension of the central through hole of the front end surface of the fire extinguishing bomb shell.

The front end of the tail body is a connecting section, and the diameter of the connecting section is the same as the inner diameter of the rear end of the fire extinguishing bomb shell; the tail entity rear section is a tail wing installation section; four axial tail mounting grooves are uniformly distributed on the outer circumferential surface of the tail mounting section. And the bullet tail entity connecting section and the tail wing mounting section are in conical transition. And a square groove for installing the delay relay is formed in the center of the end face of the tail wing installation section. The inner center of the bullet tail body is provided with an axial through hole for placing a lead wire and an ignition wire of the continuous contact ground detonator, the gunpowder column and the delay relay.

After the bullet tail entity is put into the fire extinguishing bullet shell, the connecting section of the bullet tail entity is filled and fixedly connected with the fire extinguishing bullet shell by using a foaming agent.

The invention has the beneficial effects that:

the air drop type forest fire extinguishing bomb adopts double-insurance explosion-guiding technology, the shell of the fire extinguishing bomb is formed by blow molding polystyrene foam, and the material is of the same qualityThe fire extinguishing agent has the advantages of light weight, good mechanical strength, good water resistance and recycling, and the light shell can effectively improve the filling amount of the fire extinguishing agent and enhance the fire extinguishing efficiency. The fire extinguishing cartridge shell is filled with the dry powder extinguishing agent, the extinguishing agent is fried after the powder grain is ignited, and the effective dispersion area of the extinguishing agent of the single extinguishing cartridge with the test filling amount of 15kg can reach 50m ² The accumulation of fire extinguishing agent is very small.

The fire extinguishing bomb adopts a double-insurance fire extinguishing bomb explosion-guiding technology of double explosion-guiding by a contact trigger fuze and a delay fuze, ensures effective release dispersion and fire extinguishing of the fire extinguishing agent after the fire extinguishing bomb is dropped by air, avoids detonation failure during operation, can not achieve fire extinguishing effect, and generates potential safety hazard caused by 'dumb bomb'. Through multiple tests, the fire extinguishing bullet can be respectively suitable for extinguishing crown fire and surface fire, and no 'dummy bullet' is generated so far. The fire extinguishing bomb also adopts a split design, namely, the main bomb body filled with the fire extinguishing agent and the delay device are stored separately during storage and transportation, and the fire extinguishing bomb is combined before throwing, so that false detonation can be prevented, and the safety is ensured.

In conclusion, the double explosion-guiding air-drop type forest fire extinguishing bomb adopting the polystyrene foam as the shell can improve the dispersion area of the fire extinguishing agent, greatly reduce the potential safety hazard existing in 'false explosion' or 'non-explosion', and is a novel efficient, reliable and safe forest fire extinguishing bomb.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a schematic diagram of the structure of the present invention;

FIG. 4 is an exploded view of a ground engaging detonator;

FIG. 5 is a schematic view of the structure of a fire extinguishing bomb shell;

fig. 6 is an exploded view of the tail entity in combination with the tail wing and the delay relay.

In the figure: 1. a ground-contacting detonation device; 2. a fire extinguishing bomb body; 3. a tail; 4. a button cap; 5. a button base; 6. a button contact; 7. a fire extinguishing bomb shell; 8. a powder column; 9. a dry powder extinguishing agent; 10. a tail entity; 11. a tail wing; 12. a delay relay; 13. a wire; 14. an ignition wire.

Detailed Description

The embodiment is an air drop type forest fire extinguishing bomb adopting a double-insurance explosion-guiding technology, and comprises a ground-touching detonation device 1, a fire extinguishing bomb body 2, a bomb tail 3, a time delay relay 12, an ignition wire 14 and a lead 13.

The fire extinguishing bomb body 2 comprises a fire extinguishing bomb shell 7, a tail entity 10, a tail wing 11, a powder column 8 and a dry powder extinguishing agent 9. Wherein the tail body 10 is positioned at the rear end of the fire extinguishing bullet shell, and the front end of the tail body is arranged in the fire extinguishing bullet shell; four tail fins are uniformly distributed on the circumference of the bullet tail body. The inner cavity of the fire extinguishing bomb shell 7 is filled with a dry powder extinguishing agent 9, the powder column 8 is arranged at the center of the fire extinguishing bomb shell 4, the axial direction is parallel to the direction of the bomb body, and the position of the powder column is fixed by the dry powder extinguishing agent 9 filled around. The ground-contact detonation device 1 is arranged in the center of the front end face of the fire extinguishing bomb body 2. The delay relay 12 is installed in the center of the rear end face of the fire extinguishing bomb body. One end of the wire 13 is communicated with the button contact 6 positioned at the front end of the fire extinguishing bomb shell 7, and the other end is communicated with the time delay relay. One end of the ignition wire 14 is connected to the powder column 8, and the other end is connected to the delay relay 12.

The ground-contacting squib device 1, namely a push button switch, comprises a push button cap 4, a push button base 5 and push button contacts 6. Wherein the button base 5 is positioned in a through hole in the center of the front end face of the fire extinguishing bomb shell 7; the button cap 4 is positioned outside the fire extinguishing bullet shell and is adhered to the center of the front end face of the button base 5; the button contact 6 is positioned in the fire extinguishing bullet shell and is adhered to the end face of the rear end of the button base 5. The button base 5 is composed of a round baffle plate and a square connecting block. The connecting block is positioned in the center of the inner side surface of the baffle, and the external dimension of the connecting block is matched with the external dimension of the central through hole of the front end surface of the fire extinguishing bomb shell 7.

The button cap 4 at the front end of the ground-touching detonating device 1 is in a normally open state, the button cap 4 is adhered to the button base 5, the button base 5 is adhered to the button contact 6, and the button base 5 is clamped into a through hole at the front port of the fire extinguishing bomb shell 7. The lead 13 from the ground engaging detonator 1 is connected to a delay relay 12 located at the tail of the fire extinguishing bullet.

The fire extinguishing bomb shell 7 is formed by blow molding polystyrene foam; explosive is filled in the powder column 8, and detonates through an ignition wire when in action, and the ignition wire 14 is led out from a small hole at the rear end of the powder column 8 and is connected with the tail delay relay 12.

The front end of the tail body 10 is a connecting section, and the diameter of the connecting section is the same as the inner diameter of the rear end of the fire extinguishing bomb shell 7; when the bullet tail entity is put into the fire extinguishing bullet shell, a foaming agent is used to fill and fixedly connect the bullet tail entity connecting section and the fire extinguishing bullet shell. The tail entity rear section is a tail wing installation section; four axial tail mounting grooves are uniformly distributed on the outer circumferential surface of the tail mounting section. And the bullet tail entity connecting section and the tail wing mounting section are in conical transition. A square groove for installing the delay relay 12 is arranged in the center of the tail wing installation section end face. In the centre of the tail body 10 there is an axial through hole for receiving the wire 13 and ignition wire 14 of the three of the contact detonator 1, the cartridge 8 and the delay relay 12.

Four tail fins 11 are all wing plates made of Fabry-Perot wood. The material is light in weight and environment-friendly, and is inserted into the tail fin mounting groove on the outer surface of the cylinder at the rear end of the tail body 10 for fixation. The delay relay 12 is embedded and adhered in a square groove hollowed out in the bottom surface of the cylinder at the rear end of the tail body 8.

The delay relay adopts the existing products.

When in use, the button cap of the ground-contacting detonation device 1 is in a normally open state. After the unmanned aerial vehicle carries the embodiment to reach a preset height and aims at a launching position, fire extinguishing bomb is put in, so that the fire extinguishing bomb moves to a fire scene in a free falling state. Simultaneously, a gravity trigger switch fixed on the unmanned aerial vehicle is triggered, and a delay relay starts timing; and when the timing is cut off, the fire extinguishing bomb is detonated by the current generated by the delay relay. If the delay relay fails in the air or is not timed to finish landing in advance, the ground-touching detonation device of the head of the fire extinguishing bomb is triggered to explode, so that the 'double-insurance' detonation effect is achieved.

Claims

1. The double-insurance explosion-guiding air drop type forest fire extinguishing bomb is characterized by comprising a ground-touching detonating device, a fire extinguishing bomb body, a delay relay, an ignition wire and a lead wire; the fire extinguishing bomb body comprises a fire extinguishing bomb shell, a bomb tail entity, a tail wing, a powder column and a dry powder extinguishing agent; wherein the tail body is positioned at the rear end of the fire extinguishing bullet shell, and the front end of the tail body is arranged in the fire extinguishing bullet shell; four tail wings are uniformly distributed on the circumference of the bullet tail entity; the inner cavity of the fire extinguishing bullet shell is filled with dry powder extinguishing agent, the powder column is arranged at the center of the fire extinguishing bullet shell, the axial direction of the powder column is parallel to the direction of the body of the fire extinguishing bullet, and the position of the powder column is fixed by the dry powder extinguishing agent filled around the powder column; the ground-contact detonation device is arranged in the center of the front end face of the fire extinguishing bomb body; the delay relay is arranged in the center of the end face of the rear end of the fire extinguishing bomb body; one end of the wire is communicated with a button contact positioned at the front end of the fire extinguishing bomb shell, and the other end of the wire is communicated with the delay relay; one end of the ignition wire is connected with the powder column, and the other end of the ignition wire is connected with the delay relay;

the ground-contact detonating device comprises a button cap, a button base and a button contact; wherein the button base is positioned in a through hole in the center of the front end face of the fire extinguishing bomb shell; the button cap is positioned outside the fire extinguishing bullet shell and is adhered to the center of the front end face of the button base; the button contact is positioned in the fire extinguishing bullet shell and is adhered to the end face of the rear end of the button base;

the front end of the tail body is a connecting section, and the diameter of the connecting section is the same as the inner diameter of the rear end of the fire extinguishing bomb shell; the tail entity rear section is a tail wing installation section; four axial tail wing mounting grooves are uniformly distributed on the outer circumferential surface of the tail wing mounting section; the bullet tail entity connecting section and the tail wing mounting section are in conical transition; a square groove for installing a delay relay is formed in the center of the end face of the tail wing installation section; an axial through hole is formed in the inner center of the bullet tail body and is used for placing a lead wire and an ignition wire of the continuous contact ground detonator, the gunpowder column and the delay relay;

when the double-safety explosion-guiding air drop type forest fire extinguishing bomb is used, the button cap of the ground-touching explosion-guiding device is in a normally open state, the unmanned aerial vehicle carries the double-safety explosion-guiding air drop type forest fire extinguishing bomb to reach a preset height to aim at a launching position, then the fire extinguishing bomb is put in, the fire extinguishing bomb moves to a fire scene in a free falling state, meanwhile, a gravity trigger switch fixed on the unmanned aerial vehicle is triggered, and a time delay relay starts to count; when the timing is cut off, the fire extinguishing bomb is detonated by the current generated by the delay relay, if the delay relay fails in the air or is not timing to finish landing in advance, the ground-touching detonating device of the head part of the fire extinguishing bomb is triggered to detonate, so that the 'double-insurance' detonating effect is achieved.

2. The double-insurance explosion-guided air drop type forest fire extinguishing bomb according to claim 1, wherein the button base consists of a round baffle plate and a square connecting block; the connecting block is positioned in the center of the inner side surface of the baffle, and the external dimension of the connecting block is matched with the external dimension of the central through hole of the front end surface of the fire extinguishing bomb shell.

3. The double-insurance explosion-guided air drop type forest fire extinguishing bomb according to claim 1, wherein after the bomb tail entity is put into the fire extinguishing bomb shell, the connecting section of the bomb tail entity and the fire extinguishing bomb shell are filled and fixedly connected by using a foaming agent.