CN101229416A - forest fire mortar shells - Google Patents

Abstract

The invention relates to a forest fire extinguishing mortar shell, which is divided into a working part and a propulsion part. Consists of a tail and a basic cartridge. The connecting screw of the working part is fixed on the front end of the casing, and the fuze is fixed at the front end. The central projectile charge tube is a thin metal thin-walled piece axially penetrating through the casing. The center propellant tube is equipped with sprinkler, and the space between the center propellant tube and the shell is filled with fire extinguishing powder. The artillery shells use the mortars equipped in large quantities by the militia reserve forces as the launching platform. They have a long launch distance, high safety performance, high reliability, large charge, high fire extinguishing efficiency, and low production and use costs.

Description

forest fire mortar shells

technical field

The invention relates to a fire extinguishing bomb launched by a mortar.

Background technique

Existing forest fire extinguishing bombs are mainly hand-throwing forest fire extinguishing mortar shells, which are limited by the throwing method, shape and capacity, have small loading of fire extinguishing agent, poor fire extinguishing efficiency and safety performance, and cannot meet the actual fire extinguishing needs of the forestry department. The forestry sector is in urgent need of a kind of throwing distance, throwing convenience, high safety, good fire extinguishing efficiency, and a large number of small-caliber artillery and special launchers equipped with the militia reserve force are the artillery-fired forest fire-extinguishing mortar shells of the launch platform.

Chinese patent literature discloses a kind of gun fire extinguishing bullet (notification number: CN2338722Y), and it is made up of the projectile body with empennage and the bullet fuze that is assembled on the projectile body and launching igniter, and fire extinguishing agent and throwing device are housed in the projectile body. Its full-bomb structure is the existing mortar shell structure, the loading ratio of the fire extinguishing agent is small, and the realization form of fire extinguishing agent throwing is too simple. The effective throwing of the fire extinguishing agent reduces the fire extinguishing efficiency, and the safety performance of the gunpowder as a throwing agent cannot be effectively guaranteed, and the cost is high.

Contents of the invention

The purpose of the present invention is to provide a kind of forest fire extinguishing mortar shell, and it uses the mortar equipped in large quantities by the militia reserve force as a launch platform, and it has a long throwing distance, high safety performance, high reliability, large charge, and high fire extinguishing efficiency , Low cost of production and use.

Technical scheme of the present invention is:

A forest fire extinguishing mortar shell, which is divided into a working part and a propulsion part. The working part is composed of a fuze, a connecting screw, a charge bag, a fire extinguishing powder, a central propellant tube, a propellant, a shell and a fairing, and the propulsion part is composed of a tail Composed of basic drug tubes. Its characteristics are: the connecting screw of the working part is fixed at the front end of the shell, and the fuze is fixed at the front end. fixed. The center propellant tube is equipped with sprinkler, and the space between the center propellant tube and the shell is filled with fire extinguishing powder.

The shell is a thin-walled part of long cylindrical engineering plastics, and its rear end is connected with a conical fairing, which is connected with the tail of the bullet through the fairing, and the fire extinguishing powder is also filled in the fairing.

The connecting screw is provided with a pin explosion hole.

The central propellant tube is composed of a screw cap, a shell and a sealing cover; the screw cap and the sealing cap are fixedly connected to the front and rear ends of the shell, and the shell is filled with propellant.

The features of the utility model are as follows:

Compared with traditional mortar shells and existing forest fire extinguishing shells, the utility model has the following advantages:

1. The slender central projectile tube that runs through the shell is adopted, and its total length is long, which can ensure that the fire extinguishing powder filled in the shell and the inner cavity of the fairing can be effectively thrown out, and ensure the uniformity of fire extinguishing powder throwing, ensuring effective fire extinguishing area.

2. The wall of the shell of the central propellant is thin. After the action of the propellant, the fragments of the shell of the central propellant are light in weight, the speed decays quickly, and the safety is better.

3. It adopts a cylindrical large-volume shell structure and is equipped with a fairing, which can be filled with a large amount of fire extinguishing powder to ensure the use requirements of high-efficiency fire extinguishing.

4. The casing and fairing are made of engineering plastics. The fragments of the projectile after detonation have no lethality, meet the safety of fire protection products, and can be recycled and reused (the maximum reusability rate is up to seven times).

5. The basic charge and the tail adopt the structure of the existing standard bullets. The technology is mature and stable, which is easy to improve efficiency and save costs. At the same time, the existing mortars (such as 82mm) that are equipped with a large number of militia reserve troops can be used as launching platforms. , It is easy to equip militia reserve troops in large quantities.

6. In order to ensure the external ballistic performance of the projectile, a metal material connecting screw is added in front of the projectile to adjust the center of gravity of the projectile and the position of the pressure center of the projectile when it is flying in the air, which increases the mass of the projectile and ensures that it can be fired at a low launch angle. Forced.

7. From the perspective of safety, a pin blast hole 2 is designed on the connecting screw, which is safe and reliable to use.

It can be seen that the forest fire extinguishing mortar shell has its simple structure, low production and use cost, and has the advantages of safe and reliable service handling and use, long range, large coverage, high fire extinguishing efficiency, and no pollution to the environment.

Description of drawings

The sectional structural diagram of this forest fire extinguishing mortar shell of Fig. 1;

Fig. 2 is wherein the sectional structural drawing of connecting screw;

Fig. 3 is a cross-sectional structure diagram of the central projectile tube.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Referring to Fig. 1, the forest fire extinguishing mortar shell of the present utility design comprises fuze 1, connecting screw 2, medicine bag 3, fire extinguishing powder 4, center projectile medicine tube 5, projectile medicine 6, housing 7, fairing cover 8, bullet tail 9 , Basic drug tube 10, etc. It is divided into a working part and a propulsion part, and the connecting screw 2 of the working part fixes the central propellant tube 5 and the fuze 1 on the casing 7 . Referring to FIG. 2 , the connecting screw 2 is provided with a pin explosion hole 21 . A drug package 3 is arranged between the central projectile drug tube 5 and the fuze 1 . Housing 7 is a long cylindrical engineering plastics thin-walled part, and its rear end is connected with conical fairing 8, which is connected with tail 9 by fairing 8, and fairing 8 is also formed by injection molding of engineering plastics. The central propellant tube 5 is a slender metal piece axially penetrating through the shell 7, and its front end is connected to the fuze 1 through the charge package 3. Fire extinguishing powder is filled between the covers. After adopting this working part structure, the structural design of the housing 7 and the fairing 8 effectively improves the volume of the body cavity, which effectively improves the filling capacity of the fire extinguishing powder. At the same time, the engineering plastic thin-walled structure of the housing 7 and the fairing 8 The generated fragments decay quickly and effectively ensure the safety of firefighters. The propelling part is made up of bullet tail 9 and basic gun tube 10, and bullet tail 9 and basic gun tube 10 are identical with existing standard mortar bomb tail and basic gun tube structure, can use the small-caliber artillery that existing militia reserve force is equipped with in large quantities (82mm mortar) as the launching platform.

Referring to Fig. 3, the center propellant tube is a metal material. It consists of a head screw cover 51, a tube shell 52 and a sealing cover 53. The head screw cover 51 and the sealing cover 53 are fixedly connected with the tube shell 52, and the propellant 6 is contained in the tube shell 52. The implementation principle of the center propellant tube is: after the fire transfer device of the fuze is activated, the charge package placed in the inner cavity of the connecting screw is ignited, and then the head screw cover 51 of the center center propellant tube acts, and then the center propellant tube shell is ignited and filled. The propellant 6, and the sealing cover 53 prevents the high-pressure gas generated by the combustion from leaking out so as to squeeze the center propellant tube shell.

How to use this forest fire extinguishing mortar shell:

Find the fire point, according to the distance displayed by the rangefinder, according to the range, check the forest fire extinguishing mortar projectile table, adjust the mortar firing angle, put the forest fire extinguishing bomb into the forest fire extinguishing launcher, and the forest fire extinguishing bullet has 10 basic cartridges. Triggered by the firing pin of the launcher or triggered by the pull, the ignited basic cartridge forest fire extinguisher is shot into the air above the target. According to the preset setting, after the fuze 1 on the forest fire extinguishing bomb hits a branch or the ground, the propellant 6 in the central propellant tube 5 is ignited by the fire transmission device and the drug bag 3 in the inner cavity of the drug connection screw 2, and the projectile is ejected. The medicine is quickly converted into high-pressure gas, and the high-pressure gas squeezes through the center projectile medicine tube 5 and quickly passes through the fire extinguishing powder 4 filled in the inner cavity of the casing 7 and the fairing 8 to squeeze through the casing 7 and take out the fire extinguishing powder in the casing 7 and the fairing 8 Powder 4. The shock wave crushes the shell and blows out the flame on the burning object. After the fire extinguishing powder is thrown, it forms an aerosol above the burning object to block the air and sink to cover the surface of the burning object, so that it cannot be re-ignited.

Claims (4)

1. The forest fire mortar shell is divided into a working part and a propulsion part. The working part includes a fuze (1), a connecting screw (2), a drug bag (3), a fire extinguishing powder (4), a propellant (6), a shell body (7); the propelling part is made up of a bullet tail (9) and a basic drug tube (10); it is characterized in that: the connecting screw (2) of the working part is fixed on the front end of the casing (7), and the front end is fixed with a fuze (1) The working part also includes a central propellant tube (5), the central propellant tube (5) is a slender metal piece that axially penetrates the shell (7), and its front end is connected with the fuze (1) through the propellant pack (3) , connected and fixed by the connecting screw (2); the throwing medicine (6) is installed in the center projecting medicine pipe (5), and the fire extinguishing powder (4) is filled between the center projecting medicine pipe (5) and the housing (7). 2. The forest fire extinguishing mortar shell according to claim 1, characterized in that: the housing (7) is a long cylindrical engineering plastics thin-walled part, and its rear end is connected to a conical fairing (8), Connect with bullet tail (9) by fairing cover (8), also be filled with fire extinguishing powder (4) in the fairing cover (8). 3. The forest fire extinguishing mortar shell according to claim 1 or 2, characterized in that: the connecting screw (2) is provided with a pin explosion hole (21). 4. The forest fire extinguishing mortar shell according to claim 1 or 2, characterized in that: the central propellant tube (5) is a metal thin-walled part, consisting of a head screw cover (51), a pipe shell (52) and a sealing Cover (53) is formed; Head screw cover (51) and seal cover (53) are fixedly connected in the front and back end of pipe shell (52), and filling propellant (6) in the pipe shell (52).

Images