Valve-type expansion wave cannon

Abstract

The present invention provides a valve-type expansion wave gun, comprising a gun body and a breech block, a powder chamber is arranged along the length direction of the gun body through the breech block, one end of the powder chamber is connected to the projectile passage, and the other end is formed with a gas injection port for injecting high-temperature gunpowder gas, a bolt body control mechanism and a piston control mechanism are arranged on the breech block, and due to the closing of the left bolt body and the right bolt body, the bolt body control mechanism is in a locked state, and due to the piston member pushing the left connecting rod or the right connecting rod, the locked state of the bolt body control mechanism is released. The valve-type expansion wave gun of the present invention controls the timing of the bolt body opening, thereby reducing the recoil impulse and recoil force of the gun shooting without affecting the initial velocity and range of the projectile, eliminating the complex recoil device, and significantly improving the firing speed, reducing the chamber temperature of the barrel during shooting, slowing down the barrel ablation, and extending the service life of the barrel.

Description

Technical Field

[0001] The invention relates to the technical field of weapon equipment development, in particular to a valve-type expansion wave cannon. Background Art

[0002] In order to overcome the negative problems of conventional barreled artillery, such as large recoil impulse and high temperature in the chamber during shooting, which affect the performance and service life of the artillery, the existing technology usually makes the barrel thicker and heavier, and installs complex recoil devices and muzzle devices. However, these measures increase the mobility burden of the artillery and reduce the rapid mobile combat capability of the artillery.

[0003] The expansion wave gun combines the structural characteristics of conventional guns and recoilless guns. By installing a back-spray device at the rear of the gun and controlling the opening time of the back-spray device, the high-pressure and high-temperature gunpowder gas in the chamber is guided to spray back at high speed and generate reverse thrust backwards, thereby greatly offsetting the recoil impulse, solving the serious problem of excessive recoil in large-caliber guns, and eliminating the complex recoil device. At the same time, it significantly increases the firing speed, reduces the barrel temperature during barrel shooting, slows down barrel ablation, and extends the barrel service life.

[0004] In the design and use of expansion wave artillery, the timing of opening the back jet device is very critical and difficult to control. If the back jet device is opened too late, the purpose of reducing the recoil impulse of the artillery will not be achieved, and the gun mount designed to withstand low recoil impulse will not be able to withstand the high recoil impulse in the closed-bore firing state, affecting the service life of the artillery and even causing major safety accidents. If the back jet device is opened too early, the projectile will not be able to reach the predetermined initial velocity, which will ultimately affect the range of the artillery. Summary of the invention

[0005] In view of this, the present invention aims to propose a valve-type expansion wave artillery, so as to control the timing of the bolt opening according to different types of bullets and charging amounts, thereby reducing the recoil impulse when the artillery is fired without affecting the initial velocity of the projectile and the range of the artillery.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A valve-type expansion wave gun comprises a gun barrel and a breech block, wherein a projectile passage for projectiles to pass through is formed inside the gun barrel, a powder chamber for storing gunpowder is formed inside the breech block, the powder chamber is arranged along the length direction of the gun barrel and passes through the breech block, one end of the powder chamber is connected to the projectile passage, and the other end is formed with a gas injection port for injecting high-temperature gunpowder gas, and a left bolt body and a right bolt body for opening and closing the gas injection port are pivotally provided on the breech block;

[0008] The breech block is provided with a bolt body control mechanism and a piston control mechanism; the bolt body control mechanism comprises a left crank arm which rotates synchronously with the left bolt body, and a right crank arm which rotates synchronously with the right bolt body, a left connecting rod is pivotally connected to the left crank arm, a right connecting rod is pivotally connected to the right crank arm, and the left connecting rod is pivotally connected to the right connecting rod. Since the left bolt body and the right bolt body close the gas injection port, the left connecting rod and the right connecting rod are on the same straight line and are perpendicular to the left crank arm and the right crank arm, so that the bolt body control mechanism is in a locked state;

[0009] The piston control mechanism comprises a cylinder and a piston part which is partially slidably arranged in the cylinder, the gun body is provided with an air guide hole, the gun body is provided with an air guide hole, and the interior of the cylinder is connected with the projectile channel through an air guide pipe and the air guide hole;

[0010] Because the piston member pushes the left connecting rod or the right connecting rod, the locking state of the latch body control mechanism is released, so that the left latch body and the right latch body are in a state of being able to rotate freely.

[0011] Furthermore, a switch valve for controlling whether the gas pipe is open is provided on the gas pipe. During firing, when the projectile moves along the gun body through the gas hole, the gunpowder gas enters the cylinder part through the switch valve and the gas pipe, thereby pushing the piston part to move.

[0012] Furthermore, the switch valve is a time-delay valve.

[0013] Furthermore, the piston member includes a piston rod portion slidably arranged in the cylinder member, and a piston head located at one end of the piston rod portion extending out of the cylinder member, and a first elastic member is connected between the piston member and the cylinder member, and the first elastic member is wound around the piston rod portion.

[0014] Furthermore, the bolt body control mechanism further comprises an elastic block, a groove is provided on the breech block, and the groove is located in the extension direction of the piston member, the elastic block is slidably arranged in the groove, and a second elastic member is arranged between the elastic block and the groove bottom of the groove;

[0015] A slot is provided on the elastic card block. When the elastic card block extends out of the slot and when the latch body control mechanism is in a locked state, the left connecting rod or the right connecting rod is clamped in the slot. When the piston member pushes the left connecting rod or the right connecting rod, the elastic card block can be pushed into the slot, so that the left connecting rod and the right connecting rod can be disengaged from the slot.

[0016] Furthermore, the elastic block is provided with guiding inclined surfaces on two opposite side surfaces close to the piston member and away from the piston member.

[0017] Furthermore, a left pivot axis and a right pivot axis are rotatably arranged on the breech block, the left bolt body and the left curved arm are arranged on the left pivot axis, and the right bolt body and the right curved arm are arranged on the right pivot axis.

[0018] Furthermore, the left latch body and the left pivot shaft are splined, and the left crank arm and the left pivot shaft are splined; the right latch body and the right pivot shaft are splined, and the right crank arm and the right pivot shaft are splined.

[0019] Furthermore, a left rotating handle is provided on the left pivot shaft; and a right rotating handle is provided on the right pivot shaft.

[0020] Furthermore, the two side surfaces of the left latch body in contact with the right latch body are mutually matching inclined surfaces.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The valve-type expansion wave cannon described in the present invention is provided with a latch body control mechanism and a piston control mechanism to control the latch body to be fixed in a closed state or a state in which it can rotate freely, and the timing of opening the latch body is controlled by presetting the position of the gas guide hole, thereby reducing the recoil impulse during cannon shooting without affecting the initial velocity of the projectile and the cannon range, thereby reducing the recoil force. The structure is simple, and due to the discharge of gunpowder gas, the chamber temperature of the cannon during shooting can be reduced, the ablation of the cannon barrel can be slowed down, and the service life of the cannon can be extended.

[0023] In addition, by providing a delay valve in the air duct, the timing of releasing the latch body control mechanism from the locked state can be more accurately controlled, and thus the timing of opening the latch body can be more accurately controlled. And by providing an elastic clamping block, the left connecting rod or the right connecting rod can be clamped in the clamping slot, so that the latch body control mechanism can be more stably locked.

[0024] In addition, by providing a left rotating handle and a right rotating handle, it is convenient to manually operate the handle to open or close the bolt body. And by setting the two sides of the left bolt body and the right bolt body in contact with each other as inclined surfaces that match each other, a better sealing effect can be achieved to prevent the gunpowder gas from leaking from the side of the left bolt body and the right bolt body abutting when the bolt body is closed, thereby affecting the initial velocity of the projectile and the range of the gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of the valve-type expansion wave cannon according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the valve-type expansion wave cannon according to an embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the installation structure of the right curved arm and the right bolt body of the valve-type expansion wave cannon on the right pivot shaft according to an embodiment of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the left latch body according to an embodiment of the present invention;

[0030] Figure 5 for Figure 1 A partial enlarged view of middle A;

[0031] Figure 6 for Figure 2 A partial enlarged view of B.

[0032] Description of reference numerals:

[0033] 1. Gun barrel; 100. Cannonball channel; 101. Air guide hole; 2. Gun breech; 201. Chamber; 202. Gas injection port; 203. Groove; 3. Projectile;

[0034] 4. Left latch body; 5. Right latch body; 6. Left crank arm; 7. Right crank arm; 8. Left connecting rod; 9. Right connecting rod; 10. Air guide tube; 11. Elastic clamp block; 1101. Guide slope; 12. Clamping slot;

[0035] 13. Spline groove; 14. Left turning handle; 15. Right turning handle; 16. Square protrusion; 17. Piston member; 1701. Piston rod; 1702. Piston head; 18. Cylinder member;

[0036] 19. Hoop; 20. Switch valve; 21. First elastic member; 22. Second elastic member; 23. Right pivot shaft. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", "front", "back", "left", "right", "top", "bottom", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0041] The present embodiment relates to a valve-type expansion wave cannon, comprising a gun body 1 and a breech block 2. A projectile passage 100 for projectiles 3 to pass through is formed inside the gun body 1, a powder chamber 201 for storing gunpowder is formed inside the breech block 2, the powder chamber 201 is arranged along the length direction of the gun body 1 and passes through the breech block 2, one end of the powder chamber 201 is connected to the projectile passage 100, and a gas injection port 202 for injecting high-temperature gunpowder fuel gas is formed at the other end, and a left latch body 4 and a right latch body 5 for opening and closing the gas injection port 202 are pivotally provided on the breech block 2.

[0042] The breech block control mechanism and the piston control mechanism are provided on the breech block 2. The breech block control mechanism includes a left crank arm 6 that rotates synchronously with the left breech block 4, and a right crank arm 7 that rotates synchronously with the right breech block 5. The left connecting rod 8 is pivotally connected to the left crank arm 6, the right connecting rod 9 is pivotally connected to the right crank arm 7, and the left connecting rod 8 is pivotally connected to the right connecting rod 9. Since the left breech block 4 and the right breech block 5 close the gas injection port 202, the left connecting rod 8 and the right connecting rod 9 are on the same straight line and are perpendicular to the left crank arm 6 and the right crank arm 7, so that the breech block control mechanism is in a locked state, so that the left breech block 4 and the right breech block 5 are fixed in a closed state.

[0043] The piston control mechanism includes a cylinder member 18 and a piston member 17 slidably disposed in the cylinder member 18. The gun body 1 is provided with an air guide hole 101. The interior of the cylinder member 18 is connected to the projectile channel 100 through the air guide pipe 10 and the air guide hole 101. As the piston member 17 pushes the left connecting rod 8 or the right connecting rod 9, the locking state of the latch body control mechanism is released, so that the left latch body 4 and the right latch body 5 are in a state where they can rotate freely.

[0044] Based on the above overall introduction, Figures 1 to 6 As shown, as preferably, in this embodiment, the breech block 2 is in the shape of a rectangular parallelepiped as a whole, and a cylindrical cavity is formed inside the breech block 2, namely the above-mentioned powder chamber 201, and one end of the powder chamber 201 is connected to the projectile channel 100 formed inside the gun body 1, and the gunpowder located in the powder chamber 201 is ignited to generate high-temperature and high-pressure gunpowder gas, thereby pushing the projectile 3 located in the projectile channel 100 to be ejected.

[0045] like Figure 1 As shown in the figure, the left bolt body 4 and the right bolt body 5 are pivotally arranged on both sides of the gas injection port 202, and in order to facilitate the installation of the left bolt body 4 and the right bolt body 5, a mounting groove for the left bolt body 4 and the right bolt body 5 is provided on the breech block 2. When the left bolt body 4 and the right bolt body 5 close the gas injection port 202, the upper and lower bottom surfaces of the left bolt body 4 and the right bolt body 5 are tightly fitted with the upper and lower side surfaces of the mounting groove, and the side of the left bolt body 4 and the right bolt body 5 facing the gas injection port 202 is tightly fitted with the groove bottom surface of the mounting groove, thereby ensuring that the chamber 201 has a good sealing performance to prevent the leakage of gunpowder gas from the gas injection port 202.

[0046] In addition, to further ensure the sealing performance of the medicine chamber 201, as Figure 3 and Figure 4 As shown in the figure, in the present embodiment, the two side surfaces of the left bolt body 4 and the right bolt body 5 in contact are set as mutually matching inclined surfaces, so as to prevent the gunpowder gas from leaking from the side surfaces of the left bolt body 4 and the right bolt body 5 in contact, thereby affecting the initial velocity and range of the projectile 3.

[0047] In this embodiment, the bolt body control mechanism is arranged on the top of the breech block 2. When the left bolt body 4 and the right bolt body 5 are in Figure 1 In the closed state shown in , the left crank arm 6 and the right crank arm 7 are arranged in parallel, and the left connecting rod 8 and the right connecting rod 9 are located on the same straight line and are arranged perpendicular to the left crank arm 6 and the right crank arm 7, so that the force applied by the left crank arm 6 to the left connecting rod 8 and the force applied by the right crank arm 7 to the right connecting rod 9 cancel each other out, so that the locking control mechanism is in a locked state, thereby making the left crank arm 6 and the right crank arm 7 unable to rotate. Since the left crank arm 6 rotates synchronously with the left latch body 4, and the right crank arm 7 rotates synchronously with the right latch body 5, the left latch body 4 and the right latch body 5 can be fixed in a closed state.

[0048] like Figure 1As shown, a left pivot shaft and a right pivot shaft 23 are rotatably arranged on the breech block 2, the left bolt body 4 and the left crank arm 6 are arranged on the left pivot shaft, and the right bolt body 5 and the right crank arm 7 are arranged on the right pivot shaft 23. In order to enable the left bolt body 4 and the left crank arm 6 to rotate synchronously, and to enable the right bolt body 5 and the right crank arm 7 to rotate synchronously, in this embodiment, a spline connection is adopted between the left bolt body 4 and the left pivot shaft, a spline connection is adopted between the left crank arm 6 and the left pivot shaft, a spline connection is adopted between the right bolt body 5 and the right pivot shaft 23, and a spline connection is adopted between the right crank arm 7 and the right pivot shaft 23.

[0049] In specific implementation, Figure 3 As shown in the figure, the left pivot shaft and the right pivot shaft 23 can be both set as spline shafts, and spline grooves 13 are set on the left crank arm 6 and the left latch body 4, and the right crank arm 7 and the right latch body 5. In addition, in addition to the spline connection, other connection methods can be used between the left latch body 4 and the left crank arm 6 and the left pivot shaft, and between the right latch body 5 and the right crank arm 7 and the right pivot shaft 23, such as flat key connection.

[0050] In addition, in order to facilitate manual control of the opening and closing of the latch body, a left rotating handle 14 is provided on the left pivot shaft, and a right rotating handle 15 is provided on the right pivot shaft 23. Figure 1 and Figure 3 As shown in the figure, a square protrusion 16 extends upward from the top of the left pivot shaft and the right pivot shaft 23, and a square through hole is provided on the left rotating handle 14 and the right rotating handle 15. By making the square protrusion 16 be stuck in the square through hole, the left rotating handle 14 is installed on the left pivot shaft, and the right rotating handle 15 is installed on the right pivot shaft 23.

[0051] In addition, by providing a gas hole 101 on the gun body 1, the gas hole 101 is connected to the gas pipe 10, and the position of the gas hole 101 is adjusted to control the timing of the gunpowder gas entering the gas hole 101, thereby controlling the unlocking timing of the bolt body control mechanism.

[0052] In order to more accurately control the timing of the bolt body opening, a switch valve 20 is provided on the gas pipe 10 to control whether the gas pipe 10 is open or not. During firing, when the projectile 3 moves along the gun body 1 through the gas hole 101, the gunpowder gas enters the cylinder member 18 through the switch valve 20 and the gas pipe 10, thereby pushing the piston member 17 to move. The switch valve 20 is preferably a delay valve, so that after the gunpowder gas enters the gas pipe 10, the timing of the gas pipe 10 opening can be further controlled to further control the unlocking timing of the bolt body control mechanism.

[0053] like Figure 1 and Figure 2 As shown in , the piston member 17 is arranged opposite to the position where the left connecting rod 8 and the right connecting rod 9 are pivotally connected, and the cylinder member 18 is installed to the top of the breech block 2 through the hoop 19. Figure 5 and Figure 6 As shown in the figure, the piston member 17 includes a piston rod portion 1701 slidably disposed in the cylinder member 18, and a piston head portion 1702 located at one end of the piston rod portion 1701 extending out of the cylinder member 18, and a first elastic member 21 is connected between the piston member 17 and the cylinder member 18, and the first elastic member 21 is wound around the piston rod portion 1701. The elastic member enables the piston member 17 to be elastically extended and retracted on the cylinder member 18, so that after the left latch body 4 and the right latch body 5 are opened, the piston member 17 can automatically return to its original position, so as to facilitate subsequent use.

[0054] In addition, Figure 5 and Figure 6 As shown in , the bolt body control mechanism also includes an elastic block 11, a groove 203 is provided on the breech block 2, and the groove 203 is located in the extension direction of the piston member 17, the elastic block 11 is slidably arranged in the groove 203, and a second elastic member 22 is arranged between the elastic block 11 and the groove bottom of the groove 203. Preferably, the groove 203 is arranged at the position where the left connecting rod 8 and the right connecting rod 9 are pivotally connected, the elastic block 11 is slidably arranged in the groove 203, and a second elastic member 22 is arranged between the elastic block 11 and the groove bottom of the groove 203. And preferably, the groove 203 is arranged at the top of the breech block 2 and corresponds to the position where the left connecting rod 8 and the right connecting rod 9 are pivotally connected when the bolt body control mechanism is in the locked state.

[0055] A slot 12 is provided on the elastic block 11. When the elastic block 11 extends out of the groove 203 and when the latch body control mechanism is in a locked state, the left connecting rod 8 or the right connecting rod 9 is clamped in the slot 12. When the piston member 17 pushes the left connecting rod 8 or the right connecting rod 9, the elastic block 11 can be pushed into the groove 203, so that the left connecting rod 8 and the right connecting rod 9 can be disengaged from the slot 12.

[0056] In addition, in order to facilitate the piston member 17 to push the elastic block 11 and to re-engage the left connecting rod 8 and the right connecting rod 9 in the slot 12, guiding slopes 1101 are provided on the two opposite sides of the elastic block 11 close to the piston member 17 and away from the piston member 17, so as to facilitate the piston member 17 to push the elastic block 11 into the groove 203, and facilitate the left connecting rod 8 and the right connecting rod 9 to rotate and be re-engaged in the slot 12.

[0057] It should be noted that, in this embodiment, both the first elastic member 21 and the second elastic member 22 can be springs commonly used in the prior art.

[0058] When the valve-type expansion wave cannon is in use, the left latch body 4 and the right latch body 5 are first closed and the latch body control structure is in a locked state. The gunpowder in the chamber 201 is ignited, and the high-temperature and high-pressure gunpowder gas generated will push the projectile 3 to move forward. After the projectile 3 passes through the gas hole 101, the high-temperature and high-pressure gas will enter the cylinder part 18 through the gas hole 101 and the gas pipe 10, and make the piston part 17 push the position where the left connecting rod 8 and the right connecting rod 9 are pivotally connected, thereby unlocking the locked state of the latch body control mechanism. After that, the left latch body 4 and the right latch body 5 are opened under the push of the gunpowder gas, and the gunpowder gas is ejected from the gas injection port 202.

[0059] The valve-type expansion wave cannon of this embodiment is provided with a latch body control mechanism and a piston control mechanism to control the latch body to be fixed in a closed state or a freely rotatable state, and the timing of opening the latch body is controlled by presetting the position of the air guide hole 101 and the switch valve 20, thereby reducing the recoil impulse and recoil force designed for the cannon without affecting the initial velocity and range of the projectile 3. The structure is simple, and due to the discharge of gunpowder gas, the chamber temperature of the cannon during shooting can be reduced, the ablation of the cannon can be slowed down, and the service life of the cannon can be extended.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve-type expansion wave gun, comprising a gun barrel (1) and a gun breech (2), wherein a shell passage (100) is formed inside the gun barrel (1), and a powder chamber (201) is formed inside the gun breech (2), characterized in that: The powder chamber (201) is arranged along the length direction of the gun body (1) and passes through the breech (2); one end of the powder chamber (201) is connected to the projectile passage (100), and the other end is formed with a gas injection port (202); a left bolt body (4) and a right bolt body (5) for opening and closing the gas injection port (202) are pivotally provided on the breech (2); The breech block (2) is provided with a latch body control mechanism and a piston control mechanism; The latch body control mechanism comprises a left crank arm (6) and a right crank arm (7) which rotate synchronously with the left latch body (4) and the right latch body (5), respectively; a left connecting rod (8) is pivotally connected to the left crank arm (6), a right connecting rod (9) is pivotally connected to the right crank arm (7), and the left connecting rod (8) is pivotally connected to the right connecting rod (9); because the left latch body (4) and the right latch body (5) close the gas injection port (202), the left connecting rod (8) and the right connecting rod (9) are on the same straight line and are perpendicular to the left crank arm (6) and the right crank arm (7), thereby putting the latch body control mechanism in a locked state; The piston control mechanism comprises a cylinder part (18) and a piston part (17) slidably arranged in the cylinder part (18); an air guide hole (101) is provided on the gun body (1); the interior of the cylinder part (18) is connected to the artillery shell passage (100) through an air guide pipe (10) and the air guide hole (101); As the piston (17) pushes the left connecting rod (8) or the right connecting rod (9), the locking state of the latch body control mechanism is released, so that the left latch body (4) and the right latch body (5) are in a state where they can rotate freely.

2. The valve-type expansion wave gun according to claim 1, characterized in that: The gas guide tube (10) is provided with a switch valve (20) for controlling whether the gas guide tube (10) is open or not. During firing, when the projectile (3) moves along the gun barrel (1) and passes through the gas guide hole (101), the gunpowder gas enters the cylinder part (18) through the switch valve (20) and the gas guide tube (10), thereby pushing the piston part (17) to move.

3. The valve-type expansion wave gun according to claim 2, characterized in that: The switch valve (20) is a time-delay valve.

4. The valve-type expansion wave gun according to claim 1, characterized in that: The piston member (17) includes a piston rod portion (1701) slidably arranged in the cylinder member (18), and a piston head portion (1702) located at one end of the piston rod portion (1701) extending out of the cylinder member (18), and a first elastic member (21) is connected between the piston member (17) and the cylinder member (18), and the first elastic member (21) is wound around the piston rod portion (1701).

5. The valve-type expansion wave gun according to claim 1, characterized in that: The bolt body control mechanism further comprises an elastic block (11), a groove (203) is arranged on the breech block (2), and the groove (203) is located in the extension direction of the piston member (17), the elastic block (11) is slidably arranged in the groove (203), and a second elastic member (22) is arranged between the elastic block (11) and the groove bottom of the groove (203); The elastic card block (11) is provided with a card slot (12). When the elastic card block (11) extends out of the groove (203) and when the latch body control mechanism is in a locked state, the left connecting rod (8) or the right connecting rod (9) is clamped in the card slot (12). When the piston member (17) pushes the left connecting rod (8) or the right connecting rod (9), the elastic card block (11) can be pushed into the groove (203), so that the left connecting rod (8) and the right connecting rod (9) are disengaged from the card slot (12).

6. The valve-type expansion wave gun according to claim 5, characterized in that: The elastic block (11) is provided with guiding inclined surfaces (1101) on two opposite side surfaces close to the piston member (17) and away from the piston member (17).

7. The valve-type expansion wave gun according to claim 1, characterized in that: A left pivot axis and a right pivot axis (23) are rotatably arranged on the breech block (2); the left bolt body (4) and the left curved arm (6) are arranged on the left pivot axis; and the right bolt body (5) and the right curved arm (7) are arranged on the right pivot axis (23).

8. The valve-type expansion wave gun according to claim 7, characterized in that: The left latch body (4) is connected to the left pivot shaft by a spline, and the left crank arm (6) is connected to the left pivot shaft by a spline; The right latch body (5) and the right pivot shaft (23) are connected by a spline, and the right crank arm (7) and the right pivot shaft (23) are connected by a spline.

9. The valve-type expansion wave gun according to claim 7, characterized in that: A left rotating handle (14) is provided on the left pivot shaft; A right rotating handle (15) is provided on the right pivot shaft (23).

10. The valve-type expansion wave gun according to any one of claims 1 to 9, characterized in that: The two side surfaces of the left latch body (4) and the right latch body (5) that are in contact are mutually matching inclined surfaces.

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