A riot gun uses 40mm tear gas smoke-generating riot control ammunition.

Abstract

This utility model discloses a 40mm tear gas smoke-generating riot control round for riot guns, relating to the field of riot control ammunition technology. The utility model includes a projectile assembly with a launching component at its bottom, and the projectile assembly includes an upper projectile body. By employing a high-low pressure chamber staged pressurization structure, the high-pressure chamber first accumulates energy during propellant combustion, then releases it to the low-pressure chamber through a pressure relief hole, propelling the projectile assembly to embed in the rifling and fly at high speed, increasing the range to ≥200m, with a maximum of 400m. This solves the problems of insufficient chamber pressure and limited range caused by the single high-pressure chamber design in existing technologies, meeting the needs of long-range law enforcement. It uses CS instead of CN as the irritant; CS is chemically stable, non-carcinogenic after combustion, has low skin irritation, and degrades quickly, resulting in minimal environmental impact. This solves the problems of toxic residues and health hazards associated with CN irritants in existing technologies, improving the safety of weapon use.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof ammunition technology, and in particular to a 40mm tear gas smoke-generating riot ammunition for riot guns. Background Technology

[0002] In maintaining public safety and responding to sudden mass incidents, non-lethal riot control weapons are essential equipment for law enforcement and security forces. Their core requirement is to effectively control the movement of individuals or disperse rioting crowds while minimizing permanent harm to people and environmental damage. Tear gas riot control grenades, as a key component of non-lethal weapons, are widely used in counter-terrorism, riot control, and mass incident response scenarios due to their small size, portability, and controllable range of action.

[0003] Law enforcement agencies in various countries have equipped themselves with various types of tear gas smoke-generating riot control rounds, among which the JWK683 38mm tear gas round for riot guns is representative. This type of round is a single-shot design, compatible with .38mm caliber riot guns, using CN as the core irritant, releasing tear gas smoke through a combustion reaction. It has a maximum range of approximately 120m and is mainly used for crowd dispersal and target control at close to medium range. Structurally, it uses metal as the main projectile material, relies on the combustion of a single propellant grain to generate smoke, and achieves propulsion through a traditional chamber pressure design.

[0004] The tear gas grenades used in the JWK683 38mm riot gun fail to meet the requirements for long-range control. This deficiency stems from the fact that its firing system design does not employ a high-low pressure chamber staged pressurization structure. Instead, it propels the projectile through a single high-pressure chamber, resulting in insufficient chamber pressure and low energy utilization. This limits the initial velocity of the projectile, leading to a shorter flight distance. Furthermore, the lack of a delayed triggering or stabilization mechanism upon landing makes it easy for the target to throw back, thus losing its dispersal effect. This is due to the simple structure of the projectile, the lack of a delayed ignition design, the immediate triggering of smoke release upon landing, and the unreasonable weight distribution of the projectile, resulting in poor stability after landing and susceptibility to being moved by external forces. In addition, the use of CN as an irritant, while producing an irritant effect, can cause skin diseases such as rashes and burns upon skin contact and has potential carcinogenicity. This is because CN is chemically unstable and easily produces toxic residues after combustion, posing a significant long-term hazard to human health and the environment. Utility Model Content

[0005] In response to the problems of existing riot control ammunition having short range, being easily counter-thrown, and containing harmful irritants, this utility model provides a 40mm tear gas smoke-generating riot control ammunition for riot guns.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: a 40mm tear gas smoke-generating riot control bullet for riot guns, comprising a projectile assembly, a launching assembly at the bottom of the projectile assembly, the projectile assembly including an upper projectile body, a lower projectile body at the bottom of the upper projectile body, an upper propellant column fixedly connected within the cavity formed between the upper and lower projectile bodies, an ignition tablet fixedly connected to the bottom of the upper propellant column, a lower propellant column fixedly connected to the bottom of the ignition tablet, and a flame ignition tube fixedly connected to the inner cavity of the lower propellant column. The upper and lower projectiles are connected by an adapter structure, forming a closed cavity to accommodate the propellant grain. Both sides have vent holes. A sealing plate is embedded at the top of the upper projectile to seal and protect the internal propellant grain. The bottom of the lower projectile connects to the cartridge case of the launching assembly, ensuring stable force distribution during launch. The upper and lower propellant grains are distributed vertically within the cavity of the projectile assembly, separated and connected by an ignition tablet. This dual-propellant grain design is not a simple stacking; rather, it achieves orderly combustion through the conduction effect of the ignition tablet. When the ignition tablet is ignited... After combustion, the flame simultaneously ignites both the lower and upper propellant columns, ensuring the continuity and completeness of combustion. The flame ignition tube penetrates the inner cavity of the lower propellant column, extending its bottom into the cartridge of the firing assembly. It is a key component for triggering the combustion of the propellant column. The dual propellant columns have a larger total loading capacity, significantly increasing the amount of tear gas produced after combustion, covering a wider area and enhancing the dispersal effect on large groups of people. The combustion process of the upper and lower propellant columns allows for the continuous release of tear gas, ensuring a more lasting control effect on the target area. The dual propellant column structure reduces the risk of effect failure due to incomplete combustion of a single propellant column. Even if one part of the propellant column experiences a slight abnormality, the other part can still guarantee the basic tear gas function. The upper and lower propellant columns use CS irritant, which is more irritating than the CN irritant used in existing technologies. It can induce physiological reactions in the target personnel more quickly, improving control and dispersal efficiency. At the same time, CS irritant is safer and more environmentally friendly, causing less damage to human skin and having no potential carcinogenicity, reducing secondary harm after use and better meeting the safety requirements of non-lethal weapons.

[0007] Preferably, the launching assembly includes a cartridge case, the top of which is fitted onto the surface of the lower projectile. A primer is fixedly connected to the bottom of the cartridge case, and a copper bowl is fixedly connected to the inner cavity of the cartridge case, above the primer. The inner cavity of the copper bowl is filled with propellant. In this preferred embodiment, the top of the cartridge case fitted onto the surface of the lower projectile forms a stable connection structure, ensuring that the projectile assembly and the launching assembly are subjected to uniform force during launch. The primer at the bottom provides initial energy for ignition, while the copper bowl seals the high-pressure gas in the early stage of propellant combustion, releasing it only after the pressure reaches a threshold, ensuring the controllability of the launch power. This structure makes the launch process more stable, providing continuous and effective propulsion for the projectile assembly, and helping to improve the projectile's flight distance and stability.

[0008] Preferably, a primer seat is fixedly connected to the bottom of the cartridge case and to the outside of the primer. In this preferred embodiment, the primer seat protects the primer from accidental impacts during storage, transportation, or loading, and also enhances the structural strength of the bottom of the cartridge case, allowing the impact force to be transmitted more evenly during firing, reducing the possibility of cartridge case deformation, and improving the overall structural reliability.

[0009] Preferably, the bottom of the flame ignition tube extends into the inner cavity of the cartridge case, and a counterweight is fixedly connected to the outer side of the flame ignition tube. In this preferred embodiment, the bottom of the flame ignition tube extending into the inner cavity of the cartridge case facilitates synchronous ignition during propellant combustion, ensuring accurate triggering of the delayed ignition mechanism. The counterweight on its outer side optimizes the center of gravity distribution of the projectile assembly, making the projectile less susceptible to airflow interference during flight, maintaining a stable ballistic trajectory, and improving the accuracy of hitting the target area.

[0010] Preferably, a plug is fixedly connected to the top of the upper projectile, and the plug is embedded in the inner cavity of the upper projectile. In this preferred embodiment, the plug is embedded in the inner cavity of the upper projectile, effectively sealing the propellant inside the projectile assembly, preventing moisture and impurities from affecting the performance of the propellant during storage. At the same time, when the propellant burns and generates high-pressure smoke, the plug can work with the smoke vent to control the initial pressure of smoke release, making smoke release more orderly and efficient.

[0011] Preferably, both the upper and lower projectiles are made of plastic, and the head of the upper projectile is designed with a streamlined structure. In this preferred embodiment, the use of plastic for both the upper and lower projectiles is lighter than traditional metal materials, reducing the overall weight of the projectile and helping to increase its range. Furthermore, the good machinability of plastic facilitates the manufacture of a streamlined head structure, reducing air resistance during flight and further improving the projectile's flight stability and range.

[0012] Preferably, the cartridge case includes a high-pressure chamber and a low-pressure chamber. The high-pressure chamber is located below the copper container, and the low-pressure chamber is located above the copper container. The high-pressure chamber and the low-pressure chamber are connected through a pressure relief hole. In this preferred embodiment, the high-pressure chamber and the low-pressure chamber are connected through the pressure relief hole to form a staged pressurization structure. The high-pressure chamber can accumulate the high-pressure gas generated by the combustion of the propellant and smoothly release energy to the low-pressure chamber through the pressure relief hole. This allows the projectile assembly to obtain a continuous and uniform driving force, avoiding the problem of unstable power output in a single pressure chamber design, and effectively improving the initial velocity and maximum range of the projectile.

[0013] Preferably, the flame ignition tube is a delayed ignition tube with a delay time set to 2-4 seconds. In this preferred embodiment, the delay time of the delayed ignition tube is set to 2-4 seconds, which ensures that the propellant is ignited and smoke is released only after the projectile assembly has flown over the target, thus avoiding the risk of the projectile being thrown back after landing.

[0014] Preferably, both the upper and lower projectiles are provided with smoke vents, which are evenly distributed on the sidewalls of the upper and lower projectiles. In this preferred embodiment, the evenly distributed smoke vents on the sidewalls of the upper and lower projectiles allow the tear gas smoke generated by the combustion of the propellant to be released into the air quickly and evenly from multiple directions, thus expanding the diffusion range of the smoke.

[0015] Preferably, the top of the plug is provided with a threaded hole, and a window-breaking head is threadedly connected to the inner cavity of the threaded hole. In this preferred embodiment, the threaded hole and the window-breaking head are connected by threads to form a detachable window-breaking assembly, ensuring that the window-breaking head is not easily dislodged during projectile flight and impact with obstacles, thus guaranteeing the stability of the window-breaking effect. At the same time, the detachable design makes the window-breaking head easy to replace and maintain, and it can be flexibly selected whether to install it according to actual combat needs, improving the weapon's operational flexibility. The window-breaking head can effectively break through obstacles such as door and window glass or thin door panels with the kinetic energy of the projectile flight, solving the problem that traditional tear gas cannot be effective against targets concealed behind obstacles.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are as follows: This solution provides a 40mm tear gas smoke-generating riot control bullet for riot guns. By adopting a high-low pressure chamber staged pressurization structure, the high-pressure chamber first accumulates energy during the combustion of the propellant, and then releases it to the low-pressure chamber through the pressure relief hole, pushing the projectile assembly to embed into the rifling and fly at high speed, thereby increasing the range to ≥200m, with a maximum of 400m. This solves the problems of insufficient chamber pressure and limited range caused by the single high-pressure chamber design in the prior art, meeting the needs of long-distance law enforcement. It uses CS instead of CN as the irritant. CS is chemically stable, non-carcinogenic after combustion, has low skin irritation, and degrades quickly, resulting in minimal environmental impact. This solves the problems of toxic residue and health hazards of CN irritants in the prior art, improving the safety of weapon use. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0019] Figure 2 This is a schematic diagram of a half-sectional structure in Embodiment 1 of this utility model.

[0020] Figure 3 This is a half-sectional view of the projectile assembly in Embodiment 1 of this utility model.

[0021] Figure 4 This is a half-sectional view of the transmitting component in Embodiment 1 of this utility model.

[0022] Figure 5 This is a bottom view of the structure in Embodiment 1 of this utility model.

[0023] In the attached diagram: 1. Projectile assembly; 11. Upper projectile body; 12. Lower projectile body; 13. Upper propellant charge; 14. Ignition charge; 15. Lower propellant charge; 16. Flame ignition tube; 2. Launch assembly; 21. Cartridge; 22. Primer; 23. Copper ferrule; 24. Propellant; 3. Primer base; 4. Counterweight; 5. Blocking plate; 6. Threaded hole; 7. Window breaker. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] Example 1

[0026] like Figure 1-5 As shown, a 40mm tear gas smoke-generating riot control bullet for a riot gun includes a projectile assembly 1. A launching assembly 2 is provided at the bottom of the projectile assembly 1. The projectile assembly 1 includes an upper projectile body 11 and a lower projectile body 12 is provided at the bottom of the upper projectile body 11. An upper propellant column 13 is fixedly connected in the cavity formed between the upper projectile body 11 and the lower projectile body 12. An ignition tablet 14 is fixedly connected at the bottom of the upper propellant column 13. A lower propellant column 15 is fixedly connected at the bottom of the ignition tablet 14. A flame ignition tube 16 is fixedly connected to the inner cavity of the lower propellant column 15.

[0027] The upper projectile 11 and lower projectile 12 are connected by an adapter structure to form a closed cavity to accommodate the propellant charge. Both are equipped with smoke vents on their side walls. A plug 5 is embedded in the top of the upper projectile 11 to seal and protect the internal propellant charge. The bottom of the lower projectile 12 is connected to the cartridge 21 of the launching assembly 2 to ensure that the projectile assembly 1 can be stably stressed during launch. The upper propellant charge 13 and the lower propellant charge 15 are distributed vertically within the cavity of the projectile assembly 1, separated and connected by an ignition tablet 14. This dual-propellant charge design is not a simple superposition, but achieves orderly combustion through the conduction effect of the ignition tablet 14. When the ignition tablet 14 is ignited, the flame simultaneously ignites the lower propellant charge 15 and the upper propellant charge 13, ensuring the continuity and fullness of the propellant charge combustion. The flame ignition tube 16 penetrates the inner cavity of the lower propellant charge 15 and extends its bottom into the cartridge 21 of the launching assembly 2. It is a key component for triggering the combustion of the propellant charge. The dual-powder column design results in a larger total charge, significantly increasing the amount of tear gas produced after combustion. This allows for wider coverage and enhanced dispersal of large groups of people. The combustion process of the upper and lower powder columns 13 and 15 ensures continuous release of tear gas, guaranteeing a more lasting control effect on the target area. The dual-powder column structure reduces the risk of effect failure due to incomplete combustion of a single column. Even if one column experiences minor abnormalities, the other can still maintain basic tear gas function. The upper and lower powder columns 13 and 15 use CS irritant, which is more irritating than the CN irritant used in existing technologies. It can induce physiological reactions in the target personnel more quickly, improving control and dispersal efficiency. At the same time, CS irritant is safer and more environmentally friendly, causing less damage to human skin and having no potential carcinogenicity, reducing secondary harm after use and better meeting the safety requirements of non-lethal weapons.

[0028] The launching assembly 2 includes a cartridge 21, the top of which is fitted onto the surface of the lower projectile 12. A primer 22 is fixedly connected to the bottom of the cartridge 21. A copper bowl 23 is fixedly connected to the inner cavity of the cartridge 21 above the primer 22. The inner cavity of the copper bowl 23 is filled with propellant 24.

[0029] The top of the cartridge case 21 is fitted onto the surface of the lower projectile 12, forming a stable connection structure to ensure that the projectile assembly 1 and the launching assembly 2 are subjected to uniform force during launch. The primer 22 at the bottom provides initial energy for firing, while the copper cup 23 can seal the high-pressure gas in the early stage of the combustion of the propellant 24 and release it after the pressure reaches the threshold, ensuring the controllability of the launch power. This structure makes the launch process more stable, provides continuous and effective propulsion for the projectile assembly 1, and helps to improve the flight distance and stability of the projectile.

[0030] The bottom of the cartridge 21, located outside the primer 22, is fixedly connected to the primer seat 3.

[0031] The primer seat 3 protects the primer 22 from accidental impacts during storage, transportation, or loading, and also enhances the structural strength of the bottom of the cartridge 21, allowing the impact force to be transmitted more evenly during firing, reducing the possibility of deformation of the cartridge 21, and improving the overall structural reliability.

[0032] The bottom of the flame ignition tube 16 extends into the inner cavity of the cartridge 21, and a counterweight 4 is fixedly connected to the outside of the flame ignition tube 16.

[0033] The bottom of the flame ignition tube 16 extends into the inner cavity of the cartridge 21, so that it can be ignited simultaneously when the propellant 24 is burning, ensuring the accurate triggering of the delayed ignition mechanism. The counterweight 4 on its outer side can optimize the center of gravity distribution of the projectile assembly 1, so that the projectile is not easily disturbed by airflow during flight, maintains a stable ballistic trajectory, and improves the accuracy of hitting the target area.

[0034] The top of the upper projectile 11 is fixedly connected to a blocking piece 5, which is embedded in the inner cavity of the upper projectile 11.

[0035] The plug 5 is embedded in the inner cavity of the upper projectile body 11, effectively sealing the propellant inside the projectile assembly 1 to prevent moisture and impurities from affecting the performance of the propellant during storage. At the same time, when the propellant burns and generates high-pressure smoke, the plug 5 can work with the smoke vent to control the initial pressure of smoke release, making the smoke release more orderly and efficient.

[0036] Both the upper projectile 11 and the lower projectile 12 are made of plastic, and the head of the upper projectile 11 is designed with a streamlined structure.

[0037] The upper body 11 and lower body 12 are made of plastic, which is lighter than traditional metal materials, reducing the overall weight of the projectile and helping to increase the range. At the same time, the plastic material is easy to process, making it easy to manufacture a streamlined head structure, reducing air resistance during flight, and further improving the projectile's flight stability and range.

[0038] The cartridge 21 contains a high-pressure chamber and a low-pressure chamber. The high-pressure chamber is located below the copper bowl 23, and the low-pressure chamber is located above the copper bowl 23. The high-pressure chamber and the low-pressure chamber are connected by a pressure relief hole.

[0039] The high-pressure chamber and the low-pressure chamber are connected through a pressure relief hole to form a staged pressurization structure. The high-pressure chamber can accumulate the high-pressure gas generated by the combustion of the propellant 24 and release the energy smoothly to the low-pressure chamber through the pressure relief hole, so that the projectile assembly 1 can obtain a continuous and uniform thrust. This avoids the problem of unstable power output in the single pressure chamber design and effectively improves the initial velocity and maximum range of the projectile.

[0040] Among them, the flame ignition tube 16 is a delayed ignition tube, and its delay time is set to 2 to 4 seconds.

[0041] The delay time of the delayed ignition tube is set to 2-4 seconds, which ensures that the propellant column is ignited and smoke is released only after the projectile assembly 1 has flown over the target, thus avoiding the risk of the projectile being thrown back after landing.

[0042] Both the upper projectile 11 and the lower projectile 12 are provided with smoke vents, which are evenly distributed on the sidewalls of the upper projectile 11 and the lower projectile 12.

[0043] The smoke vents evenly distributed on the side walls of the upper projectile 11 and the lower projectile 12 allow the tear gas smoke generated by the combustion of the propellant to be released into the air quickly and evenly from multiple directions, thus expanding the range of smoke diffusion.

[0044] The top of the plug 5 is provided with a threaded hole 6, and the inner cavity of the threaded hole 6 is threadedly connected to a window breaker head 7.

[0045] The threaded hole 6 and the window-breaking head 7 are connected by threads to form a detachable window-breaking component. This ensures that the window-breaking head 7 is not easily dislodged during projectile flight and impact with obstacles, guaranteeing the stability of the window-breaking effect. At the same time, the detachable design makes the window-breaking head 7 easy to replace and maintain. It can be flexibly selected for installation according to actual combat needs, improving the weapon's operational flexibility. The window-breaking head 7 can effectively break through obstacles such as door and window glass or thin door panels by using the kinetic energy of the projectile flight, solving the problem that traditional tear gas cannot be effective against targets hidden behind obstacles.

[0046] Working principle: When the riot gun needle strikes the primer 22 at the bottom of the firing assembly 2, the primer 22 is ignited and ignites the propellant 24 in the high-pressure chamber below the copper cup 23 inside the cartridge 21. The combustion of the propellant 24 produces a large amount of high-pressure gas, which causes the pressure in the high-pressure chamber to rise rapidly. When the pressure reaches the threshold, the gas breaks through the copper cup 23 and enters the low-pressure chamber above the copper cup 23 through the pressure relief hole, forming a staged pressurization power output.

[0047] The high-pressure gas in the low-pressure chamber propels the projectile assembly 1 forward along the rifling of the barrel, while simultaneously igniting the delayed ignition tube that penetrates the inner cavity of the lower propellant column 15. After exiting the muzzle, the projectile assembly 1 maintains a stable trajectory towards the target area due to the streamlined structure of the upper projectile body 11 and the optimized center of gravity distribution of the counterweight 4. After a predetermined delay time of 2 to 4 seconds, the delayed ignition tube outputs a flame to ignite the ignition tablet 14 located between the upper and lower propellant columns 13 and 15 when the projectile assembly 1 reaches the target. The ignition tablet 14, through conduction, simultaneously ignites both the lower and upper propellant columns 15, achieving orderly and complete combustion of the two propellant columns.

[0048] The combustion of the upper and lower explosive charges 13 and 15 produces a large amount of tear gas smoke. The smoke is rapidly and evenly released into the air through the smoke vents evenly distributed on the side walls of the upper and lower explosive charges 11 and 12. During this process, the plug 5 at the top of the upper explosive charge 11 works with the smoke vents to control the initial pressure of the smoke release, ensuring efficient smoke diffusion. Ultimately, the smoke acts strongly on the mucous membrane tissue of the target personnel, achieving the effect of controlling movement or dispersing crowds.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A 40mm tear gas smoke-generating riot control bullet for riot guns, comprising a projectile assembly (1), characterized in that, The projectile assembly (1) is provided with a launching assembly (2) at its bottom. The projectile assembly (1) includes an upper projectile body (11), a lower projectile body (12) is provided at the bottom of the upper projectile body (11), an upper propellant column (13) is fixedly connected in the cavity formed between the upper projectile body (11) and the lower projectile body (12), an ignition tablet (14) is fixedly connected at the bottom of the upper propellant column (13), a lower propellant column (15) is fixedly connected at the bottom of the ignition tablet (14), and a flame ignition tube (16) is fixedly connected in the inner cavity of the lower propellant column (15).

2. The 40mm tear gas smoke-generating riot control bullet for riot guns according to claim 1, characterized in that, The launching assembly (2) includes a cartridge (21), the top of which is fitted onto the surface of the lower projectile (12), a primer (22) is fixedly connected to the bottom of the cartridge (21), and a copper bowl (23) is fixedly connected to the inner cavity of the cartridge (21) and above the primer (22), and the inner cavity of the copper bowl (23) is filled with propellant (24).

3. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 2, characterized in that, A primer seat (3) is fixedly connected to the bottom of the cartridge (21) and outside the primer (22).

4. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 2, characterized in that, The bottom of the flame ignition tube (16) extends into the inner cavity of the cartridge (21), and a counterweight (4) is fixedly connected to the outside of the flame ignition tube (16).

5. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 4, characterized in that, A plug (5) is fixedly connected to the top of the upper projectile (11), and the plug (5) is embedded in the inner cavity of the upper projectile (11).

6. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 4, characterized in that, Both the upper projectile (11) and the lower projectile (12) are made of plastic, and the head of the upper projectile (11) is designed with a streamlined structure.

7. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 2, characterized in that, The cartridge (21) is provided with a high-pressure chamber and a low-pressure chamber. The high-pressure chamber is located below the copper bowl (23), and the low-pressure chamber is located above the copper bowl (23). The high-pressure chamber and the low-pressure chamber are connected by a pressure relief hole.

8. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 2, characterized in that, The flame ignition tube (16) is a delayed ignition tube, and its delay time is set to 2 to 4 seconds.

9. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 2, characterized in that, Smoke vents are provided on both the upper projectile (11) and the lower projectile (12), and the smoke vents are evenly distributed on the sidewalls of the upper projectile (11) and the lower projectile (12).

10. A 40mm tear gas smoke-generating riot control bullet for a riot gun according to claim 5, characterized in that, The top of the plug (5) is provided with a threaded hole (6), and the inner cavity of the threaded hole (6) is threadedly connected to a window break head (7).

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