A launcher front cover and a weapon launcher applying the same

Abstract

The present application relates to the field of weapon launching technology, and aims to provide a launching cylinder front cover and a weapon launching cylinder applying the same, so as to solve the technical problem that the weapon launching cylinder in the prior art is prone to causing thermal pressure impact on weapon ammunition when launching the weapon ammunition. The weapon launching cylinder comprises an outer cylinder body, an inner cylinder body and a launching cylinder front cover. An axial gap is formed at the cylinder port of the inner cylinder body and the outer cylinder body. The launching cylinder front cover is used for covering the outer cylinder body. The launching cylinder front cover is detachably assembled at the cylinder port of the weapon launching cylinder in use and comprises a cover body and a boss structure. The boss structure is used for extending into the inner cylinder body of the weapon launching cylinder. The boss structure has an avoiding hole and a flow guide surface. The avoiding hole is located above the head of the weapon ammunition. The flow guide surface is located on the outer side surface of the boss structure. The flow guide surface is used for downwardly guiding the hot air flow. The axial dimension of the flow guide surface is greater than the axial gap dimension of the cylinder port of the outer cylinder body and the cylinder port of the inner cylinder body of the weapon launching cylinder.

Description

Technical Field

[0001] This invention relates to the field of weapon launching technology, and more specifically to a front cover for a weapon launching tube. Background Technology

[0002] Weapon launch tubes not only launch the weapons and ammunition they contain, but also store and transport them. They provide long-term protection for the ammunition, thus improving storage reliability. The ammunition housed in these tubes is typically cylindrical projectiles such as torpedoes or artillery shells. The launch tube itself is a hollow tubular structure with caps at both ends, covering the tube's opening. One end of the tube has a fuel propulsion system, while the cap at the other end is movably connected to the opening. The fuel propulsion system controls the launch of the ammunition from the tube. After ignition, the ammunition propels forward, and the resulting gas flow forces the front cap of the launch tube open, ultimately launching the weapon successfully.

[0003] Chinese invention patent CN109323622B discloses a launch tube, including a launch tube body. The tube wall is made of composite material sandwich as the main material, making the tube wall a hollow sandwich structure. The front and rear ends of the launch tube body are provided with tube caps, which can seal the upper and lower ends of the launch tube. An ignition propulsion system is provided at the rear end of the launch tube body. Weapon ammunition is arranged above the ignition propulsion system, so that the weapon ammunition can be launched by igniting the ignition propulsion system. When the weapon ammunition is launched by the ignition propulsion system in this prior art, the weapon ammunition can break through the front tube cap to complete the launch.

[0004] However, the aforementioned launch tubes have a problem: missiles / torpedoes and other weapons contain many precision components used to maintain the balance and accuracy of the weapon after launch. After the fuel propulsion system ignites, the gas flow travels from the bottom of the launch tube through the interlayer between the tube walls to the vicinity of the front cover. After being shielded by the front cover, it enters the inner tube of the launch tube through the gap between the front cover and the tube wall, causing thermal pressure shock and damage to the precision components inside the weapon, thus affecting the hit rate of missiles / torpedoes and other weapons, and in severe cases, causing damage to the ammunition. Existing launch tubes do not have the function of providing thermal pressure protection for the weapon. Summary of the Invention

[0005] The purpose of this invention is to provide a front cover for a launch tube to solve the technical problem that weapon launch tubes in the prior art are prone to thermal shock to weapon ammunition when launching it; in addition, the purpose of this invention is also to provide a weapon launch tube using the front cover for launching tube to solve the above-mentioned problems.

[0006] To achieve the above objectives, the technical solution provided by this invention for a launch tube front cover is as follows:

[0007] A launch tube front cover, detachably assembled and disassembled at the front end of a weapon launch tube during use, includes a cover body for covering the opening of the outer cylinder of the weapon launch tube, and a boss structure provided on the cover body. The boss structure is fixed to the cover body and extends downward, and is used to extend into the inner cylinder of the weapon launch tube. The boss structure has a clearance hole and a guide surface. The clearance hole is located above the head of the weapon ammunition, and the guide surface is located on the outer side of the boss structure. The guide surface is used to guide the hot airflow entering the inner cylinder from the opening downward. The axial dimension of the guide surface is larger than the axial gap between the opening of the outer cylinder and the opening of the inner cylinder of the weapon launch tube, so that the boss structure blocks the head of the weapon ammunition and the axial gap, thereby changing the flow direction of the hot airflow and preventing the formation of a pressure concentration area at the head of the hot airflow.

[0008] Beneficial effects: Research has found that the main damage area of ​​weapons and ammunition is usually in the head region. When weapons and ammunition are fired, the hot airflow entering the inner cylinder from the axial gap of the weapon launch tube will form a pressure concentration area at the head of the weapon and ammunition, causing damage to the precision components at the head of the weapon and ammunition due to thermal pressure impact. To this end, the present invention provides a boss structure on the front cover of the launch tube that can block and guide the hot airflow, thereby avoiding the formation of a pressure concentration area at the head of the weapon and ammunition, and protecting the head of the weapon and ammunition. The outer surface of the boss structure forms a guide surface, which can guide the hot airflow entering the inner cylinder from the nozzle downwards to prevent thermal pressure accumulation. The clearance hole on the boss structure is located above the head and avoids the head axially, which can reduce the weight of the boss structure. This reduces the impact of the boss structure on the launch tube front cover during launch expansion. At the same time, the axial dimension of the guide surface is larger than the axial clearance dimension, which also completely blocks the axial clearance by the boss structure in the axial direction. This effectively solves the technical problem in the prior art that weapon launch tubes are prone to thermal pressure shock to weapon ammunition when launching weapon ammunition.

[0009] Preferably, the boss structure is a protective cylinder fixed to the lower side of the cover. The protective cylinder is a cylindrical structure with an open bottom. The inner hole of the protective cylinder forms the clearance hole, and the outer circumferential surface of the protective cylinder forms the guide surface. The protective cylinder is used to protect the head of the weapon ammunition. The cylindrical protective cylinder structure is simple and symmetrical, which allows the guide surface to guide the hot airflow smoothly and evenly. Its inner hole forms a clearance hole, and the overall processing and connection are very convenient, avoiding the formation of a pressure concentration area of ​​hot airflow at the head.

[0010] Preferably, the edge of the cover has a downwardly extending flange, and a fixing ring extending radially along the outer circumferential surface of the protective cylinder is fixedly provided. The inner circumferential end face of the fixing ring is used for fixed connection with the outer circumferential surface of the protective cylinder, and the outer circumferential end face of the fixing ring is used for fixed connection with the lower end of the flange. The fixing ring reinforces the connection between the protective cylinder and the cover in the axial direction, thereby making the connection between the protective cylinder and the cover more stable and secure.

[0011] Preferably, the outer peripheral end face of the cover is provided with an annular cover flange, which is used to connect with the flange on the edge of the outer cylinder, so that the cover can be detachably fixed to the cylinder mouth of the weapon launch tube. The cover flange makes the connection and arrangement of the cover at the weapon launch tube mouth stable and quick, and the flange connection and disassembly are very convenient, which is beneficial to the assembly and use of the weapon launch tube.

[0012] Preferably, the lower end face of the cover flange is provided with a sealing groove, and a sealing ring is fixed in the sealing groove. The sealing groove and the sealing ring ensure the sealing of the cover after it is connected to the front end of the launch tube, so that the storage of weapons and ammunition is in a sealed state.

[0013] The technical solution of the weapon launcher provided by this invention is as follows:

[0014] A weapon launch tube includes an outer cylinder, an inner cylinder, and a launch tube front cover. A hollow cylinder wall sandwich is formed between the inner and outer cylinders. The opening of the outer cylinder is higher than the opening of the inner cylinder, creating an axial gap between the openings of the inner and outer cylinders. The launch tube front cover is used to cover the opening of the outer cylinder. The launch tube front cover is detachable and detachable from the opening of the weapon launch tube. The launch tube front cover includes a cover body for covering the opening of the outer cylinder of the weapon launch tube, and also includes a boss structure provided on the cover body. The boss structure is fixed to the cover body and faces downwards. The protrusion structure extends into the inner cylinder of the weapon launch tube. The protrusion structure has a clearance hole and a guide surface. The clearance hole is located above the head of the weapon ammunition, and the guide surface is located on the outer side of the protrusion structure. The guide surface is used to guide the hot airflow entering the inner cylinder from the tube opening downwards. The axial dimension of the guide surface is larger than the axial gap between the tube opening of the outer cylinder and the tube opening of the inner cylinder of the weapon launch tube. This allows the protrusion structure to block the head of the weapon ammunition and the axial gap, thereby changing the flow direction of the hot airflow and preventing the formation of a pressure concentration area at the head of the hot airflow.

[0015] Beneficial effects: Research has found that the main damage area of ​​weapons and ammunition is usually in the head region. When weapons and ammunition are fired, the hot airflow entering the inner cylinder from the axial gap of the weapon launch tube will form a pressure concentration area at the head of the weapon and ammunition, causing damage to the precision components at the head of the weapon and ammunition due to thermal pressure impact. To this end, the present invention provides a boss structure on the front cover of the launch tube that can block and guide the hot airflow, thereby avoiding the hot airflow from the head of the weapon and ammunition, preventing the formation of a pressure concentration area at the head of the weapon and ammunition, and protecting the head of the weapon and ammunition. The outer surface of the boss structure forms a guide surface, which can guide the hot airflow entering the inner cylinder from the nozzle downwards to prevent thermal pressure accumulation. The clearance hole on the boss structure is located above the head and avoids the head axially, which can reduce the weight of the boss structure. This reduces the impact of the boss structure on the launch tube front cover during launch expansion. At the same time, the axial dimension of the guide surface is larger than the axial clearance dimension, which also completely blocks the axial clearance by the boss structure in the axial direction. This effectively solves the technical problem in the prior art that weapon launch tubes are prone to thermal pressure shock to weapon ammunition when launching weapon ammunition.

[0016] Preferably, the boss structure is a protective cylinder fixed to the lower side of the cover. The protective cylinder is a cylindrical structure with an open bottom. The inner hole of the protective cylinder forms the clearance hole, and the outer circumferential surface of the protective cylinder forms the guide surface. The protective cylinder is used to protect the head of the weapon ammunition. The cylindrical protective cylinder structure is simple and symmetrical, which allows the guide surface to guide the hot airflow smoothly and evenly. Its inner hole forms a clearance hole, and the overall processing and connection are very convenient, avoiding the formation of a pressure concentration area of ​​hot airflow at the head.

[0017] Preferably, the edge of the cover has a downwardly extending flange, and a fixing ring extending radially along the outer circumferential surface of the protective cylinder is fixedly provided. The inner circumferential end face of the fixing ring is used for fixed connection with the outer circumferential surface of the protective cylinder, and the outer circumferential end face of the fixing ring is used for fixed connection with the lower end of the flange. The fixing ring reinforces the connection between the protective cylinder and the cover in the axial direction, thereby making the connection between the protective cylinder and the cover more stable and secure.

[0018] Preferably, the outer peripheral end face of the cover is provided with an annular cover flange, which is used to connect with the flange on the edge of the outer cylinder, so that the cover can be detachably fixed to the cylinder mouth of the weapon launch tube. The cover flange makes the connection and arrangement of the cover at the weapon launch tube mouth stable and quick, and the flange connection and disassembly are very convenient, which is beneficial to the assembly and use of the weapon launch tube.

[0019] Preferably, the lower end face of the cover flange is provided with a sealing groove, and a sealing ring is fixed in the sealing groove. The sealing groove and the sealing ring ensure the sealing of the cover after it is connected to the front end of the launch tube, so that the storage of weapons and ammunition is in a sealed state. Attached Figure Description

[0020] Figure 1 This is a partial cross-sectional view of the weapon launch tube in Embodiment 1 provided by the present invention;

[0021] Figure 2 for Figure 1 A bottom view of the front cover of the weapon launch tube;

[0022] Figure 3 for Figure 1 A front view of the front cover of the weapon launch tube;

[0023] Figure 4 for Figure 3 Cross-sectional view of the front cover of the middle launch tube;

[0024] Figure 5 for Figure 4 A magnified view of part A in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Outer cylinder; 2. Inner cylinder; 3. Launch tube front cover; 301. Cover; 4. Protective cylinder; 5. Cover flange; 6. Sealing groove; 7. Sealing ring; 8. Fixing ring; 9. Weapon ammunition; 10. Head; 11. Ventilation channel; 12. Flanged edge. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising a…" does not exclude the process or method that includes said element.

[0030] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0032] The present invention will be further described in detail below with reference to embodiments.

[0033] Specific embodiment 1 of the weapon launcher provided by the present invention:

[0034] In this embodiment, the weapon launch tube is used to store and secure weapon ammunition within its tube body and is capable of firing the weapon ammunition outwards. The weapon launch tube is a cylindrical tube, including a tube body extending forward and backward, and a front launcher cover and a rear launcher cover located at both ends of the tube body. An ignition propulsion system is also provided at the rear end of the tube body. Both the ignition propulsion system and the rear launcher cover are fixedly mounted to the rear end of the weapon launch tube. The ignition propulsion system is used to secure the weapon ammunition inside the tube body and, upon ignition, propels the weapon ammunition outwards.

[0035] like Figure 1As shown, the weapon launch tube in this embodiment has the same tube structure as the prior art. The tube includes an outer tube 1 and an inner tube 2, which are fixed by a sleeve and have a clearance fit. A hollow tube wall sandwich is formed between the outer tube 1 and the inner tube 2, and a ventilation channel 11 is formed in the tube wall sandwich. The ventilation channel 11 allows the hot airflow during the ignition of the propulsion system to pass through and rise to the front end of the launch tube. The opening of the outer tube 1 is higher than the opening of the inner tube 2, so that an axial gap is formed at the openings of the inner tube 2 and the outer tube 1. The launch tube front cover 3 is fixedly connected to the opening of the outer tube 1. When the launch tube front cover 3 is assembled on the outer tube 1, the axial gap connects to the inner tube 2, thereby connecting the ventilation channel 11 to the inner tube 2, and the hot airflow can enter the inner tube 2 through the axial gap at the opening.

[0036] like Figures 1 to 3 As shown, the launch tube front cover 3 is detachably mounted on the nozzle of the weapon launch tube. The launch tube front cover 3 includes a cover body 301 and a boss structure fixed on the cover body 301. The cover body 301 is a disc structure, and its size is adapted to the nozzle of the outer cylinder 1 to cover the nozzle of the weapon launch tube. The boss structure is fixed on the lower side of the cover body 301 and can extend into the inner cylinder 2. In this embodiment, as shown... Figures 1 to 4 As shown, the boss structure is a protective cylinder 4 welded to the lower side of the cover 301. The protective cylinder 4 is a cylindrical structure with openings at both the front and rear. The inner hole of the protective cylinder 4 forms a clearance hole for covering the head 10 of the weapon ammunition 9. The clearance hole is located above the head 10 of the weapon ammunition 9 and avoids axial clearance with the head 10. The clearance hole reduces the weight of the boss structure, thereby facilitating the firing of the weapon ammunition 9 and the opening of the front cover of the firing tube. The outer circumferential surface of the protective cylinder 4 forms a guide surface, which is used to guide the hot airflow flowing into the inner cylinder 2 at the cylinder opening downward. The axial dimension of the guide surface (i.e., the axial length of the protective cylinder 4) is greater than the dimension of the axial gap, so that the guide cylinder can separate and shield the head 10 of the weapon ammunition 9 from the axial gap, ensuring that the head 10 of the weapon ammunition 9 will not be directly impacted by the hot airflow flowing out of the axial gap in a pressure concentration area.

[0037] like Figure 5 As shown, the edge of the cover 301 has a downwardly extending flange 12. A fixing ring 8 extending radially from the annular surface is fixedly provided on the outer wall of the protective cylinder 4. The outer peripheral end face of the fixing ring 8 is fixedly connected to the lower end of the flange 12, and the inner peripheral end face of the fixing ring 8 is fixedly connected to the outer wall of the protective cylinder 4. The outer peripheral end face of the cover 301 is also provided with an annular cover flange 5, which covers the flange 12 of the cover 301. The lower end face of the cover flange 5 is provided with an annular sealing groove 6, and a sealing ring 7 is fixed in the sealing groove 6. The cover flange 5 is used to connect with the cylinder mouth flange of the outer cylinder 1, so that the front cover 3 of the launch tube can be detachably fixed to the front end of the weapon launch tube.

[0038] In this embodiment, when the weapon launch tube is in the working state of launching weapon ammunition 9, the cover 301, the cover flange 5 and the tube body of the weapon launch tube can form a closed space. After ignition, the hot airflow is dispersed from the bottom of the weapon launch tube, passes through the ventilation channel 11 between the outer tube 1 and the inner tube 2, and rises to the vicinity of the front cover 3 of the launch tube. After being blocked by the front cover 3 of the launch tube, the hot airflow enters the inner tube 2 through the axial gap. The hot airflow is guided by the guide surface of the outer periphery of the protective tube 4 and flows downward in the inner tube 2, avoiding the formation of a pressure concentration area at the head of the weapon ammunition 9 by the high temperature and high pressure hot airflow.

[0039] Research has revealed that the primary damage area of ​​weapon ammunition 9 is typically its head region 10. During firing, the hot airflow flowing from the axial gap at the weapon launch tube into the inner cylinder 2 creates a pressure concentration area at the head region 10, causing damage to the precision components of the head region 10 due to thermal stress. Therefore, this embodiment incorporates a protective cylinder 4 on the lower side of the launch tube front cover 3, thus avoiding the formation of a pressure concentration area at the head region 10 and providing protection. The axial dimension of the guide surface is larger than the axial gap dimension, allowing the protective cylinder 4 to completely block the axial gap, effectively solving the technical problem in existing technologies where weapon launch tubes easily cause thermal stress to the weapon ammunition during firing.

[0040] Specific embodiment 2 of the weapon launcher provided by the present invention:

[0041] The difference from Embodiment 1 is that, in Embodiment 1, the boss structure is a protective cylinder 4 welded to the lower side of the cover 301. In this embodiment, the protective cylinder is fixed to the lower side of the cover by bolts. In other embodiments, the protective cylinder may also be embedded or threaded into the cover.

[0042] Specific embodiment 3 of the weapon launcher provided by the present invention:

[0043] The difference from Embodiment 1 is that, in Embodiment 1, the boss structure is a protective cylinder 4, which is a cylindrical tube with openings at the top and bottom. In this embodiment, the protective cylinder is a square tube. In other embodiments, the cross-section of the protective cylinder can also be trapezoidal, triangular, or other different shapes, and the height of the protective cylinder and the diameter of the inner hole can also be adjusted accordingly to reduce the impact of the boss structure on the front cover of the launch tube during launch.

[0044] Specific embodiment 4 of the weapon launcher provided by the present invention:

[0045] The difference from Embodiment 1 is that, in Embodiment 1, the boss structure is a protective cylinder 4 welded to the lower side of the cover 301, and the protective cylinder 4 is a cylindrical tube with openings at the top and bottom. In this embodiment, the boss structure is a conical cylinder or an inverted conical cylinder. In other embodiments, the boss structure can also be an annular boss integrally machined on the lower side of the cover. In other different embodiments, the boss structure can also be a segmented, spliced ​​boss structure.

[0046] Specific embodiment 5 of the weapon launcher provided by the present invention:

[0047] The difference from Embodiment 1 is that, in Embodiment 1, the protective cylinder 4 is provided on the lower side of the cover 301. In this embodiment, to increase the barrier effect, the boss structure is a multi-layered protective cylinder structure with intervals. Each protective cylinder is stacked and inserted, and is arranged at intervals on the lower side of the cover. The outer circumferential surface of the outermost protective cylinder forms a guide surface, and the inner hole of the innermost protective cylinder forms a clearance hole.

[0048] Specific embodiment 6 of the weapon launcher provided by the present invention:

[0049] The difference from Embodiment 1 is that, in Embodiment 1, the outer periphery of the cover 301 is provided with a downwardly extending flange 12, and a fixing ring 8 extending radially along the outer periphery of the protective cylinder 4 is fixedly provided on the outer periphery of the protective cylinder 4. The inner periphery end face of the fixing ring 8 is fixedly connected to the outer periphery of the protective cylinder 4, and the outer periphery end face of the fixing ring 8 is fixedly connected to the lower end of the flange 12. In this embodiment, a reinforcing rib or reinforcing plate is welded between the lower side of the cover and the outer periphery of the protective cylinder. The reinforcing rib or reinforcing plate strengthens the connection between the protective cylinder and the cover. In this case, the flange and fixing ring can be eliminated to save processing costs.

[0050] Specific embodiment 7 of the weapon launcher provided by the present invention:

[0051] The difference from Embodiment 1 is that, in Embodiment 1, the outer peripheral end face of the cover 301 is provided with an annular cover flange 5, which is used to connect with the flange at the mouth of the weapon launch tube, allowing the cover 301 to be detachably fixed to the mouth of the weapon launch tube. In this embodiment, the retaining edge of the outer peripheral end face of the cover protrudes from the fixing ring and extends downward, and the retaining edge is directly used for snap-fit ​​assembly with the outer cylinder of the weapon launch tube. In other different embodiments, the cover flange can also be omitted, and a latch can be provided on the cover to lock the cover and the outer cylinder.

[0052] Specific embodiments of the launch tube front cover provided by the present invention:

[0053] The structure of the launch tube front cover in this embodiment is the same as that in the various embodiments of the weapon launch tube described above. The launch tube front cover includes a cover body and a boss structure provided on the cover body. The launch tube front cover seals the opening of the weapon launch tube and can also provide heat-pressure protection for the head of the weapon ammunition placed in the weapon launch tube through the boss structure. The specific assembly method and composition structure of the launch tube front cover will not be described in detail.

[0054] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A launch tube front cover, detachably mounted to the front end of a weapon launch tube during use, comprising a cover (301) for covering the opening of the outer tube (1) of the weapon launch tube, characterized in that, It also includes a boss structure on the cover (301), the boss structure is fixed on the cover (301) and extends downward, the boss structure is used to extend into the inner cylinder (2) of the weapon launch tube; the boss structure has a clearance hole and a guide surface, the clearance hole is located above the head (10) of the weapon ammunition (9), the guide surface is located on the outer side of the boss structure, the guide surface is used to guide the hot airflow entering the inner cylinder (2) from the tube opening downward, the axial dimension of the guide surface is larger than the axial gap dimension between the tube opening of the outer cylinder (1) of the weapon launch tube and the tube opening of the inner cylinder (2), so that the boss structure blocks the head (10) of the weapon ammunition (9) and the axial gap, so as to change the flow direction of the hot airflow and avoid the hot airflow forming a pressure concentration area at the head (10).

2. The launch tube front cover according to claim 1, characterized in that, The boss structure is a protective cylinder (4) fixed on the lower side of the cover (301). The protective cylinder (4) is a cylindrical structure with an open bottom. The inner hole of the protective cylinder (4) forms the clearance hole, and the outer peripheral surface of the protective cylinder (4) forms the flow guide surface. The protective cylinder (4) is used to protect the head (10) of the weapon ammunition (9).

3. The launch tube front cover according to claim 2, characterized in that, The cover (301) has a downwardly extending flange (12) along its edge. The outer circumferential surface of the protective cylinder (4) is fixed with a fixing ring (8) extending radially along the protective cylinder (4). The inner circumferential end face of the fixing ring (8) is used to fixally connect with the outer circumferential surface of the protective cylinder (4), and the outer circumferential end face of the fixing ring (8) is used to fixally connect with the lower end of the flange (12).

4. The launch tube front cover according to claim 1, 2, or 3, characterized in that, The outer peripheral end face of the cover (301) is provided with an annular cover flange (5), which is used to connect with the flange at the edge of the outer cylinder (1) so that the cover (301) can be detachably fixed to the opening of the weapon launch tube.

5. The launch tube front cover according to claim 4, characterized in that, The lower end face of the cover flange (5) is provided with a sealing groove (6), and a sealing ring (7) is fixed in the sealing groove (6).

6. A weapon launch tube, comprising an outer cylinder (1), an inner cylinder (2), and a launch tube front cover (3), wherein a hollow cylinder wall sandwich is formed between the inner cylinder (2) and the outer cylinder (1), and the opening of the outer cylinder (1) is higher than the opening of the inner cylinder (2) to form an axial gap at the openings of the inner cylinder (2) and the outer cylinder (1), wherein the launch tube front cover (3) is used to cover the opening of the outer cylinder (1), and the launch tube front cover (3) is detachable and detachable from the front end of the weapon launch tube during use, and the launch tube front cover (3) includes a cover body (301) for covering the opening of the outer cylinder (1) of the weapon launch tube, characterized in that, The launch tube front cover (3) also includes a boss structure on the cover body (301). The boss structure is fixed on the cover body (301) and extends downward. The boss structure is used to extend into the inner cylinder (2) of the weapon launch tube. The boss structure has a clearance hole and a guide surface. The clearance hole is located above the head (10) of the weapon ammunition (9). The guide surface is located on the outer side of the boss structure. The guide surface is used to guide the hot airflow entering the inner cylinder (2) from the tube opening downward. The axial dimension of the guide surface is larger than the axial gap between the tube opening of the outer cylinder (1) of the weapon launch tube and the tube opening of the inner cylinder (2). This allows the boss structure to block the head (10) of the weapon ammunition (9) and the axial gap, thereby changing the flow direction of the hot airflow and preventing the hot airflow from forming a pressure concentration area at the head (10).

7. The weapon launcher according to claim 6, characterized in that, The boss structure is a protective cylinder (4) fixed on the lower side of the cover (301). The protective cylinder (4) is a cylindrical structure with an open bottom. The inner hole of the protective cylinder (4) forms the clearance hole, and the outer peripheral surface of the protective cylinder (4) forms the flow guide surface. The protective cylinder (4) is used to protect the head (10) of the weapon ammunition (9) and prevent the head (10) from forming a pressure concentration area.

8. The weapon launcher according to claim 7, characterized in that, The cover (301) has a downwardly extending flange (12) along its edge. The outer circumferential surface of the protective cylinder (4) is fixed with a fixing ring (8) extending radially along the protective cylinder (4). The inner circumferential end face of the fixing ring (8) is used to fixally connect with the outer circumferential surface of the protective cylinder (4), and the outer circumferential end face of the fixing ring (8) is used to fixally connect with the lower end of the flange (12).

9. The weapon launcher according to claim 6, 7, or 8, characterized in that, The outer peripheral end face of the cover (301) is provided with an annular cover flange (5), which is used to connect with the flange at the edge of the outer cylinder (1) so that the cover (301) can be detachably fixed to the opening of the weapon launch tube.

10. The weapon launcher according to claim 9, characterized in that, The lower end face of the cover flange (5) is provided with a sealing groove (6), and a sealing ring (7) is fixed in the sealing groove (6).

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