CN101168079A - forest fire shells - Google Patents

Abstract

The invention relates to a forest fire extinguishing shell, which is divided into a working part and a propulsion part. The working part includes a fuze, a connecting screw, a charge bag, a front arc, a fire extinguishing powder, a central propellant tube, a propellant, a shell and a connecting ring; the propelling part Includes tailpipe, tailpipe mount, fins and basic cartridge. The working part and the propelling part are connected through the body tail cover. The connecting screw of the working part is fixed on the front end of the shell, and the fuze is fixed on the front end. The central propellant tube is a slender metal piece that penetrates the shell in the axial direction, and its front end is connected with the fuze through the charge bag; Fire extinguishing powder is filled between the center propellant tube and the casing; the body tail cover connected to the tail end of the casing is equipped with a pressure ring and an air-closing ring. The fire-extinguishing shell is a large-caliber fire-extinguishing shell launched by a mortar, and has the advantages of large charge, long throwing distance, high safety performance, high fire-extinguishing efficiency, and low production and use cost.

Description

forest fire shells

technical field

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

Background technique

Fire is the great enemy of human survival. The main feature of forest fire is that the fire spreads quickly, and the firefighters have no time to put out the fire, or the existing means of extinguishing cannot be applied to the fire scene, causing large-scale burning and causing heavy losses. Existing forest fire extinguishing bombs are mainly hand-dropped forest fire extinguishing bombs, which have relatively short throwing distance and low reliability; due to their small shape and capacity, limited fire extinguishing agent loading, and poor fire extinguishing efficiency, they cannot fully meet the actual fire extinguishing needs of the forestry department.

Contents of the invention

The object of the present invention is to provide a large-caliber fire-extinguishing projectile launched by a mortar, which has a long throwing distance, high safety performance, high reliability and high fire-extinguishing efficiency.

The technical scheme of the present invention is: design a kind of forest fire extinguishing mortar shell, and it is divided into working part and propulsion part. The working part includes fuze, connecting screw, charge bag, front arc, fire extinguishing powder, central propellant tube, propellant, shell and connecting ring; the propulsion part includes tail pipe, tail tube seat, fins and basic charge tube. The working part and the propelling part are connected through the body tail cover. Its characteristics are: the connecting screw of the working part is fixed on the front end of the shell, and the fuze is fixed at the front end. Fixed; the center propellant tube is equipped with throwing powder, and the space between the center propellant tube and the shell is filled with fire extinguishing powder; After the casing is installed, a fixed connection mechanism is designed on the tail cover of the projectile body to realize the fixed connection between the tail cover of the projectile body and the closed gas ring and pressure ring. The casing is a long cylindrical engineering plastic thin-walled part, and the casing is divided into two parts. segments, connected in the middle by connecting rings. The front end of the housing also includes a front arc, and the connecting screw is fixed on the front end of the front arc.

The connecting screw is provided with a pin explosion hole.

The length ratio of the working part to the propulsion part is 4:1-5:1.

Features of the present invention are as follows:

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

1. The present invention adopts an open-type empennage structure, and the whole projectile composed of the working part is a large-diameter, large-volume cylindrical open-type empennage-stabilized mortar shell, which combines large-caliber rotating empennage stabilization and large-capacity fixed empennage stabilization structures Such as the characteristics of the traditional large caliber, and at the same time can meet the actual needs of forest fire fighting.

2. 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.

3. The wall of the shell of the central propellant is thin, and after the action of the propellant, the fragments of the shell of the central propellant are light in weight, fast in speed attenuation, and better in safety.

4. 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.

5. The gas-closing ring structure is adopted separately in the propelling part, which improves the muzzle velocity when exiting the chamber and ensures the accuracy when shooting.

6. The casing is made of engineering plastics. After detonation, the fragments of the projectile are not lethal, comply with the safety of fire protection products, and can be recycled and reused (the maximum reusability rate is up to seven times).

7. The basic charge and the tail adopt the structure of the existing standard bombs. The technology is mature and stable, and it is easy to improve efficiency and save costs. At the same time, the existing mortars (such as 105mm) 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.

8. 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.

9. From the safety point of view, a pin blast hole is designed on the connecting screw, which is safe and reliable to use.

Visible, this mortar fire extinguishing shell adopts mortar shell structure, can take large caliber artillery (as: 105mm mortar) as launching platform, has comparatively simpler structure, lower cost advantage compared with other shells. The elastic body is injection molded with engineering plastics, which has low processing cost and high efficiency. The basic drug tube adopts a push-in type basic drug tube, which has a simple structure and low cost. It has the characteristics of safe and reliable use, long range, large coverage, high fire extinguishing efficiency, and no pollution to the environment. The projectile body and projectile tail are injection-molded with engineering plastics, which has high production efficiency and saves raw materials; the basic charge adopts the structure of standard projectiles, which greatly saves costs, and the process is mature and stable, which is easy to improve efficiency.

Description of drawings

Fig. 1 is the structural representation of this gun fire extinguishing shell;

Fig. 2 is wherein connecting screw sectional view;

Figure 3 is a structural diagram of the open empennage.

Among them, 1-fuze, 2-connecting screw, 3-powder bag, 4-front arc, 5-fire extinguishing powder, 6-central propellant tube, 7-propellant, 8-shell, 9-connecting ring, 10 -Air closure ring, 11-pressure ring, 12-body tail cover, 13-tail pipe, 14-tail pipe seat, 15-fin, 16-basic drug tube

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

Referring to Fig. 1, the forest fire extinguishing bullet of this shot includes a fuze 1, a connecting screw 2, a charge bag 3, a front arc portion 4, a fire extinguishing powder 5, a central propellant tube 6, a propellant charge 7, a casing 8, a connecting ring 9, and an air-closing ring 10, pressure ring 11, missile body tail cover 12, tail pipe 13, tail tube seat 14, fins 15, basic medicine tube 16, it is divided into working part and propulsion part, between working part and propulsion part by body tail cover 12 connections. The connecting screw 2 of the working part fixes the central propellant tube 5 and the fuze 1 on the front arc portion 3 of the casing, and the connecting screw 2 is designed with a pin explosion hole 21 (see Figure 2). The housing 8 is made of engineering plastics, and is divided into two sections, the front and the back, which are connected by a metal connecting ring 9 . In the direction of the central longitudinal axis of the housing 8, a central propellant tube 6 is installed. The central propellant tube 6 is a slender metal thin-walled structure. Fire extinguishing powder 5 is filled between the center propellant tube 6 and the housing 8 . The rear end of the casing 8 is sealed by the body tail cover 12, and the body tail cover 12 is fixedly connected with a pressure ring 11 and an air-tight ring 10. Referring to Fig. 3, the propelling part is formed by connecting the fins 15 and the tail pipe 13 by the tail tube base 14, wherein the fins 15 are fixedly connected to the tail tube base 14 through a B-type pin, and can ensure that the underwing 15 can be stretched freely, and then through The fixed connection of the tail pipe 13 and the body tail cover 12 completes the combination of the working part and the propelling part.

The usage method of the present invention:

When a fire point is found, press the distance displayed on the rangefinder. According to the firing range, consult the mortar fire extinguishing projectile table, adjust the mortar firing angle, put the mortar fire extinguishing bullet into the mortar fire extinguishing launcher, and the mortar fire extinguishing bullet basic cartridge 16 is triggered under the pull of the launcher. Fire, ignite the basic cartridge fire extinguishing bomb is shot to the sky above the target. According to the preset setting, after the fuze 1 on the fire extinguishing bomb hits a branch or the ground, the propellant 7 in the central propellant tube 6 is ignited by the fire transmission device and the charge bag 3 of the charge connecting screw 2, and the propellant Rapidly transform into high-pressure gas, the high-pressure gas breaks through the central projectile tube 6 and quickly passes through the fire extinguishing powder 5 to break through the front arc 4 and the housing 8 and bring out the fire extinguishing powder 5 . 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 (5)

1. The forest fire extinguishing projectile is divided into a working part and a propulsion part. The working part includes a fuze, a connecting screw, a cartridge, a fire extinguishing powder, a propellant, and a casing; the propulsion part includes a tail pipe, a tail pipe seat, fins and basic The drug tube, the working part and the propelling part are connected through the tail cover of the projectile body; its characteristics are: the connecting screw of the working part is fixed on the front end of the shell, and the front end is fixed with the fuze; the working part also includes a central projectile tube, which is A slender metal piece axially penetrating through the shell, the front end of which is connected with the fuze through the charge bag and fixed through the connecting screw; the center propellant tube is equipped with throwing powder, and the center propellant tube and the shell are filled with fire extinguishing powder; A pressure ring and an air-closing ring are arranged on the outside of the body tail cover connected to the tail end of the casing. 2. The forest fire extinguishing artillery shell according to claim 1, characterized in that: the shell is a long cylindrical thin-walled part of engineering plastics, and the shell is divided into two sections, which are connected by a connecting ring in the middle. 3. The forest fire extinguishing artillery shell according to claim 1 or 2, characterized in that: the front end of the shell also includes a front arc, and the connecting screw is fixed on the front end of the front arc. 4. The forest fire extinguishing shell according to claim 1 or 2, characterized in that: the connecting screw is provided with a pin blast hole. 5. The forest fire extinguishing shell according to claim 1 or 2, characterized in that: the length ratio of the working part to the propelling part is 4:1-5:1.

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