A preparation device and method for in-situ condensation projectile

Abstract

The present invention discloses a device and method for preparing an in-situ condensed projectile, and belongs to the technical field of in-situ condensed projectile preparation equipment. The present invention includes a projectile condensation component, a projectile separation component and a projectile launching component. The projectile condensation component is sleeved on the condensation gun barrel, and is used to condense the gas in the condensation gun barrel into a projectile; the projectile launching component is arranged at the entrance of the condensation gun barrel, and is used to accelerate the launching of the projectile; the projectile separation component includes a rotary cutting unit, which is arranged on the outside of the projectile, and is used to cut the projectile and separate the projectile from the condensation gun barrel; and also includes a cutting drive unit, which is used to drive the rotary cutting unit to rotate. The main purpose of the present invention is to quickly separate the projectile from the condensation gun barrel in situ, and then accelerate the projectile, so that plasma can be injected into the nuclear fusion within the time required for rupture relief.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ condensation pellet preparation equipment, and more specifically, to a device and method for preparing in-situ condensation pellets. Background Art

[0002] Energy issues are an important topic that needs to be studied for human survival and development. Finding safe and efficient energy is of great significance to human society. Controlled nuclear fusion is the technology that people have placed the most hope on for solving energy problems since the 20th century, because it has many advantages such as abundant reserves of raw materials in nature, high production capacity, and less pollution to the environment. The magnetic confinement nuclear fusion device based on the tokamak is the most likely way to commercialize fusion energy first. However, in the plasma experiments of the tokamak device, because there are too many unstable factors in the plasma, plasma rupture often occurs. The consequences of plasma rupture are very serious, which will directly affect the operation of the tokamak device and seriously reduce the life of the device.

[0003] After long-term research and experiments, the harm caused by plasma rupture can be mitigated by injecting a large number of impurity particles into the plasma. At present, the rupture mitigation of major tokamak devices at home and abroad mainly adopts two methods: large gas injection (MGI) and spallation projectile injection (SPI). When MGI is used on small tokamak devices, it can achieve the expected effect, but when used in large devices, a large amount of gas impurities will be deposited at the plasma boundary due to diffusion and cannot penetrate into the core. In contrast, SPI injection is to cool the impurity gas into ice, and then accelerate it to a certain speed in the injection pipe through gas, and arrange a spallation structure at the tail end of the injection pipe to achieve the fragmentation of high-speed projectiles and enter the plasma. The particles injected by SPI are less affected by diffusion, and the gas can penetrate into the core of the plasma, which has better dissipation of thermal energy in the thermal quenching (TQ) stage and can more effectively suppress the formation of escape seeds. In addition, the SPI system has been identified as one of the main rupture mitigation methods for tokamaca devices.

[0004] However, the time scale for fusion device rupture is in the order of tens of milliseconds. How to quickly inject the spallation projectile into the plasma after receiving the rupture warning signal to alleviate the impact of the rupture is a key technical problem in SPI research. Since there is a high adhesion between the projectile and the condensation barrel when the projectile is formed by in-situ condensation, the projectile must be separated from the condensation barrel before it can be quickly fired. Traditional SPI systems usually use two methods to achieve the detachment of the projectile. One is to use a local high heat pulse to melt the ice layer between the condensation barrel and the projectile, thereby weakening the adhesion between the two. However, this design cannot meet the time scale required for rupture mitigation because it takes a long time for the ice layer to melt.

[0005] Another method is to use the structure of the firing pin to radially cut or strike the projectile to directly detach the projectile. For example, Chinese patent CN103903653A discloses a piston-type extrusion projectile preparation device, including an extruder; a pellet gas input pipe is provided on the extruder, and the pellet gas input pipe is connected to the piston end of the extruder, and a cavity for temporarily placing the projectile icicle is provided at the end of the piston-type extrusion rod, and a transverse pipe is provided at the end of the cavity, and a cutter is provided in the transverse pipe, and the movement of the cutter is controlled by an external cutter electromagnetic coil, so that the projectile is separated from the condensing gun barrel. However, this solution may cause the position of the projectile and the condensation to be staggered when cutting the projectile out of the gun barrel, thereby shortening the length of the propellant gas accelerating the projectile in the gun barrel, seriously affecting the ability of the projectile to accelerate. Summary of the invention

[0006] 1. Technical problem to be solved by the invention

[0007] In response to at least some problems in the prior art, the present invention provides a device and method for preparing an in-situ condensation projectile, which adopts a cutting tube rotary cutting method to quickly separate the projectile from the condensation gun barrel in situ, and then accelerates the projectile, so that plasma can be injected into the nuclear fusion within the time required for rupture relief.

[0008] 2. Technical solution

[0009] In order to achieve the above object, the technical solution provided by the present invention is:

[0010] A device for preparing in-situ condensed projectiles, comprising a projectile condensation component, a projectile separation component and a projectile launching component, wherein the projectile condensation component is sleeved on a condensation gun barrel and is used to condense the gas in the condensation gun barrel into a projectile; the projectile launching component is arranged at the entrance of the condensation gun barrel and is used to accelerate the launching of the projectile; the projectile separation component comprises a rotary cutting unit, which is arranged on the outside of the projectile and is used to cut the projectile and separate the projectile from the condensation gun barrel; and also comprises a cutting drive unit, which is used to drive the rotary cutting unit to rotate.

[0011] Furthermore, the cutting drive unit includes a spiral coil and a metal block, the spiral coil is connected to the condensing gun barrel, and the metal block is connected to the rotating cutting unit. The spiral coil and the metal block are positioned relative to each other. When the spiral coil is energized, it generates a magnetic field and interacts with the metal block to drive the rotating cutting unit to rotate.

[0012] Furthermore, the rotating cutting unit is a cutting tube, which includes a cutting part and a tube body part connected together, the cutting part is located at the condensation point of the projectile, and the tube body part is located at both ends of the cutting part; the cutting part includes cutting blades connected to the tube body part at both ends, and the cutting blades are distributed at intervals.

[0013] Furthermore, the cutting drive unit also includes a chamber formed by a flange end cover, a chamber end cover and a chamber side wall, the spiral coil and the metal block are both located in the chamber, a coil mounting plate parallel to the cutting tube is provided on the inner side of the chamber side wall, the spiral coil is mounted on the coil mounting plate, a square plate parallel to the cutting tube is provided on the tube body, and the metal block is mounted on the square plate; the coil mounting plate is opposite to the square plate, and the spiral coil is opposite to the metal block.

[0014] Furthermore, each of the cutting drive units includes two sets of spiral coils and metal blocks that are positioned opposite to each other, and the two sets of spiral coils and metal blocks that are positioned opposite to each other are symmetrically arranged relative to the center line of the cutting tube.

[0015] Furthermore, the cutting drive unit is connected to both ends of the condensing gun barrel and is symmetrically arranged relative to the projectile; an air inlet pipe and a launching tube are also provided at both ends of the condensing gun barrel, and the flange end cover is sleeved and installed on one end of the air inlet pipe and the launching tube close to the condensing gun barrel, and the chamber side wall is sleeved and installed on both ends of the condensing gun barrel, and the flange end cover and the chamber end cover are connected together by bolts.

[0016] Furthermore, the cutting drive unit also includes a reset unit, which includes a side plate, a rotating shaft installed on the side plate and a thin rope with one end connected to the rotating shaft, the side plate is connected to the coil mounting plate and is located on the side away from the spiral coil, the other end of the rotating shaft is connected to the drive motor, the coil mounting plate is provided with a through hole, and the other end of the thin rope passes through the through hole and is connected to the metal block.

[0017] The present invention also provides a method for preparing an in-situ condensation projectile. Using the in-situ condensation projectile preparation device, after the projectile condensation component is condensed into a projectile, a changing current is passed through the spiral coil. The spiral coil interacts with the metal block to drive the cutting tube to rotate, driving the cutting blade on the cutting tube to rotate and cut the projectile, so that the projectile is separated from the condensation gun barrel, and then the projectile is launched through the projectile launching component.

[0018] Furthermore, the rotation angle of each cutting blade is less than 180°.

[0019] Furthermore, after each cutting of the projectile, the driving motor in the reset unit drives the rotating shaft to rotate, so that the thin rope is retracted and wound around the rotating shaft, thereby restoring the metal block to a position relative to the spiral coil.

[0020] 3. Beneficial effects

[0021] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0022] (1) The present invention provides an apparatus and method for preparing an in-situ condensed projectile. The cutting drive unit in the projectile separation assembly drives the rotating cutting unit to rotate and cut the projectile. The cutting drive unit includes a spiral coil and a metal block. The spiral coil and the metal block in each group are arranged face to face. When the spiral coil is energized, it interacts with the metal block to drive the cutting tube to rotate and cut the projectile, so that the projectile is separated from the condensation gun barrel at the position where it is condensed, effectively preventing the projectile from leaving the position where it is condensed and shortening the acceleration stroke of the projectile.

[0023] (2) The present invention provides an apparatus and method for preparing an in-situ condensed projectile, wherein the rotating cutting unit is a cutting tube, the cutting tube includes a cutting portion and a tube body portion, the cutting portion is located at the place where the projectile is condensed, the cutting portion includes cutting blades, the cutting blades are arranged at intervals, and the interval positions are hollowed out. When the projectile condenses at this place, the projectile contacts the condensation gun barrel at the hollowed-out position, so that when the cutting knife rotates with the cutting tube, the cutting knife can effectively cut the projectile, thereby preventing the projectile from rotating together with the cutting tube.

[0024] (3) The present invention provides an apparatus and method for preparing an in-situ condensation projectile, wherein the cutting drive unit includes two sets of spiral coils and metal blocks that are positioned opposite to each other, and the two sets of spiral coils and metal blocks that are positioned opposite to each other are symmetrically arranged relative to the center line of the cutting tube, and the cutting drive unit is connected to both ends of the condensation gun barrel and is symmetrically arranged relative to the projectile; because the wall of the cutting tube is relatively thin, two sets of spiral coils and metal blocks are arranged to make it symmetrical, thereby reducing the rotation stroke of the cutting knife, thereby increasing the service life of the cutting knife and shortening the cutting time; in addition, the cutting drive unit is symmetrically arranged on both sides of the projectile, and when the cutting drive unit drives the cutting tube to rotate, the forces on both ends of the cutting tube are evenly and synchronously applied, thereby avoiding twisting of the cutting tube and damaging the cutting knife.

[0025] (4) In the device and method for preparing in-situ condensed pellets of the present invention, the cutting drive unit also includes a reset unit. After the pellet cutting is completed, the reset unit returns the metal block to its original position through the action of the thin rope and the rotating shaft, thereby preparing for the next cutting. Moreover, the driving motor drives the rotating shaft in the reset unit to rotate, which can improve the working efficiency of the reset unit. The use of the thin rope can reduce the space occupied by the reset unit, making the device structure more compact.

[0026] (5) The present invention provides an apparatus and method for preparing an in-situ condensed projectile. After the projectile condensation assembly is condensed into a projectile, a changing current is passed through the spiral coil, and the spiral coil generates a magnetic field. In the magnetic field, the metal block generates eddy currents. Under the interaction of the eddy currents and the magnetic field, the cutting tube is driven to rotate, driving the cutting blades on the cutting tube to rotate and cut the projectile, so that the projectile is separated from the condensation gun barrel, and the rotation angle of each cutting blade is less than 180°, which effectively shortens the cutting time, enables the projectile cutting to be completed quickly, and enables the projectile to enter the plasma within the predicted rupture time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the AA section enlargement of the present invention;

[0029] Figure 3 It is a schematic diagram of the enlarged structure of the BB section of the present invention;

[0030] Figure 4 It is a three-dimensional schematic diagram of the cutting tube in the present invention;

[0031] Figure 5 It is a schematic diagram of the process flow of the projectile preparation method of the present invention.

[0032] Explanation of the symbols in the schematic diagram:

[0033] 10. Cutting drive unit; 11. Flange end cover; 12. Chamber end cover; 13. Chamber side wall;

[0034] 14. Coil mounting plate;

[0035] 140, through hole; 141, side plate; 142, string; 143, rotating shaft;

[0036] 15. Helical coil; 16. Metal block; 17. Square plate;

[0037] 20. Condensation gun barrel; 21. Air intake pipe; 22. Launch tube;

[0038] 30. Cutting pipe;

[0039] 301. Cutting part; 302. Pipe body part;

[0040] 40. Solenoid valve;

[0041] 50. Projectile. DETAILED DESCRIPTION

[0042] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0043] Example

[0044] Combination Figure 1 The present embodiment provides a device for preparing an in-situ condensed projectile, comprising a projectile condensation component, a projectile separation component and a projectile launching component.

[0045] The pellet condensation assembly is sleeved on the condensation gun barrel 20, and is used to condense the gas in the condensation gun barrel 20 into pellets 50. Specifically, the pellet condensation assembly includes a cold end and a hot end, the cold end is sleeved on the condensation gun barrel 20 and connected to the condenser, and is used to transfer the cold energy of the condenser to the condensation gun barrel and condense the corresponding gas called pellets 50, and the hot end is also sleeved on the condensation gun barrel 20 and located on both sides of the cold end, and is used to heat melt excess pellets.

[0046] The projectile launching assembly is used to accelerate the launching of the projectile 50. The projectile launching assembly includes a high-pressure gas source and a connecting gas pipe, the connecting gas pipe is connected to the air inlet pipe 21, the air inlet pipe 21 is connected to the condensing gun barrel 20, and the other end of the condensing gun barrel 20 is connected to the launching tube 22. The high-pressure gas source ejects gas to accelerate the launching of the projectile 50. In order to facilitate the control of the ejection of the high-pressure gas source, a solenoid valve 40 is arranged on the air inlet pipe 21. The solenoid valve 40 adopts a pulse valve, which can quickly respond to the valve on and off command, and utilize the rapid launching of the projectile 50.

[0047] The pellet separation assembly includes a rotary cutting unit, which is arranged outside the pellet 50 and is used to cut the pellet 50 and separate the pellet 50 from the condensation barrel 20; the pellet separation assembly also includes a cutting drive unit 10, which is used to drive the rotary cutting unit to rotate. The pellet 50 is separated from the condensation barrel 20 at the position where it is condensed, effectively preventing the pellet 50 from leaving the position where it is condensed, and shortening the acceleration stroke of the pellet.

[0048] The cutting drive unit 10 includes a spiral coil 15 and a metal block 16, wherein the spiral coil 15 is connected to the condensing gun barrel 20, and the metal block 16 is connected to the rotating cutting unit. Each spiral coil 15 and the metal block 16 form a group, and the spiral coil 15 and the metal block 16 in each group are arranged face to face, so that the two can interact better. In this embodiment, the spiral coil 15 adopts a planar spiral coil to reduce the space occupied by the coil in the longitudinal direction, and can increase the area of ​​action between the spiral coil 15 and the metal block 16. The spiral coil 15 and the metal block 16 interact with each other, that is, the spiral coil 15 generates a magnetic field after being energized. In this embodiment, the spiral coil 15 is charged by an external charging capacitor, and a pulse current is generated in the spiral coil 15, thereby generating a magnetic field. The magnetic field will generate eddy currents on the metal block 16, and the eddy currents interact with the magnetic field to generate tangential electromagnetic force on the rotating cutting unit, thereby driving the rotating cutting unit to rotate, so as to achieve the purpose of cutting the projectile 50 and separating it from the condensing gun barrel 20.

[0049] Combination Figure 3 and Figure 4, the rotary cutting unit is a cutting tube 30, and is located inside the condensing gun barrel 20. The cutting tube 30 includes a cutting part 301 and a tube body 302 connected together. The cutting part 301 is located at the condensation position of the projectile 50, that is, the cutting part 301 coincides with the position where the projectile condenses, and the tube body 302 is located at both ends of the cutting part 301. The cutting part 301 includes cutting blades connected to the tube body 302 at both ends, and the cutting blades are arranged at intervals. In this embodiment, two cutting blades are arranged, and the two cutting blades are symmetrical along the center line of the cutting tube 30. The rotation angle of each cutting blade is less than half a circle, which effectively shortens the cutting time and the cutting stroke, so that the projectile cutting is completed quickly. The cutting blade is wedge-shaped, and the thickness of the cutting blade gradually decreases in the direction of rotation of the cutting tube 30. The position where the cutting blade is not set on the cutting part 301 is hollowed out. When the projectile 50 condenses here, the projectile 50 contacts the condensing gun barrel 20 at the hollowed-out position, so that when the cutting blade rotates with the cutting tube 30, the cutting blade can effectively cut the projectile, and prevent the projectile from rotating with the cutting tube 30.

[0050] Combination Figure 1 and Figure 2 The cutting drive unit 10 also includes a chamber formed by a flange end cover 11, a chamber end cover 12 and a chamber side wall 13. The spiral coil 15 and the metal block 16 are both located in the chamber, and the tube body 302 at both ends of the cutting tube 30 extends into the chamber. In this embodiment, the cutting drive unit 10 is arranged at both ends of the condensing gun barrel 20, and is symmetrically arranged relative to the projectile 50; an air inlet pipe 21 and a launch tube 22 are also arranged at both ends of the condensing gun barrel 20, and the flange end cover 11 is sleeved and installed at one end of the air inlet pipe 21 and the launch tube 22 close to the condensing gun barrel 20, one end of the chamber side wall 13 is sleeved and installed at both ends of the condensing gun barrel 20, and the other end is connected to the chamber end cover 12, and the flange end cover 11 and the chamber end cover 12 are connected together by bolts to form a chamber.

[0051] The cutting drive unit 10 includes a spiral coil 15 fixedly connected to the condensing gun barrel 20 and a metal block 16 fixedly connected to the cutting tube 30. The specific arrangement of the spiral coil 15 and the metal block 16 needs to be explained. A coil mounting plate 14 parallel to the cutting tube 30 is arranged on the inner side of the chamber side wall 13, and the spiral coil 15 is mounted on the coil mounting plate 14. A square plate 17 parallel to the cutting tube 30 is arranged on the tube body 302, and the metal block 16 is mounted on the square plate 17, wherein the coil mounting plate 14 and the square plate 17 are made of stainless steel. The coil mounting plate 14 and the square plate 17 are opposite to each other, and the spiral coil 15 and the metal block 16 are opposite to each other. Each opposite spiral coil 15 and metal block 16 form a group, and each cutting drive unit 10 includes two groups of opposite spiral coils 15 and metal blocks 16, and the two groups of opposite spiral coils 15 and metal blocks 16 are arranged symmetrically relative to the center line of the cutting tube 30. Because the wall of the cutting tube 30 is relatively thin, two sets of spiral coils 15 and metal blocks 16 are arranged to make the center symmetrical, reduce the rotation stroke of the cutting knife, and thus increase the service life of the cutting knife and shorten the cutting time. In addition, the cutting drive unit 10 is symmetrically arranged on both sides of the projectile 50. When the cutting drive unit 10 drives the cutting tube 30 to rotate, the forces on both ends of the cutting tube 30 are uniform and synchronous, thereby preventing the cutting tube 30 from twisting and damaging the cutting knife.

[0052] In this embodiment, two spiral coils 15 are provided on each coil mounting plate 14, and two metal blocks 16 are provided on each square plate 17, so that the force between the spiral coils 15 and the metal blocks 16 can be enhanced, thereby increasing the cutting speed of the projectile 50. Figure 4 In order to facilitate the adjustment of the relative position between the metal block 16 and the cutting knife, the metal block 16 and the cutting knife are located on the same straight line along the length direction of the cutting tube 30.

[0053] Combination Figure 2The cutting drive unit 10 further includes a reset unit, which includes a side plate 141, a rotating shaft 143 mounted on the side plate 141, and a thin rope 142 connected to the rotating shaft 143 at one end. The side plate 141 is connected to the coil mounting plate 14 and is located on a side away from the spiral coil 15. The other end of the rotating shaft 143 is connected to the driving motor. A through hole 140 is provided on the coil mounting plate 14. The other end of the thin rope 142 passes through the through hole 140 and is connected to the metal block 16. The through hole 140 is located at the center of the spiral coil 15. When the spiral coil 15 is energized, it interacts with the metal block 16 to rotate the cutting tube 30. The metal block 16 rotates to a position close to another group of spiral coils 15. The cutting of the projectile 50 is completed. For the next cutting, the metal block 16 needs to be restored to the previous position. The driving motor is started to drive the rotating shaft 143 to rotate, so that the thin rope 142 is retracted and wound around the rotating shaft 143 again, and the metal block 16 is reset under the drive of the thin rope 142, so that the metal blocks 16 in the same group are restored to the position relative to the spiral coil 15, ready for the next cutting of the projectile. One or two reset units can be provided in each cutting drive unit 10. In this embodiment, two reset units are provided, and each metal block 16 is reset by connecting the thin rope to the reset unit.

[0054] This embodiment also provides a method for preparing an in-situ condensed projectile, using an in-situ condensed projectile preparation device. After the projectile condensation assembly condenses into a projectile 50, a variable current is passed into the spiral coil 15. The spiral coil 15 interacts with the metal block 16 to drive the cutting tube 30 to rotate, driving the cutting blade on the cutting tube 30 to rotate and cut the projectile 50, so that the projectile 50 is separated from the condensation gun barrel 20, and then the projectile 50 is launched through the projectile launch assembly. Specifically, in the process of cutting the projectile 50, the spiral coil 15 is charged by an external charging capacitor, and a pulse current is generated in the spiral coil 15, thereby generating a magnetic field. The magnetic field will generate eddy currents on the metal block 16. The eddy currents interact with the magnetic field to generate tangential electromagnetic forces on the cutting tube 30, thereby driving the cutting tube 30 to rotate, and achieving the purpose of cutting the projectile 50 and separating it from the condensation gun barrel 20. In this embodiment, it is possible to achieve that the projectile 50 enters the plasma within a rupture prediction time of about 20ms. The projectile launching assembly uses high pressure propelling gas to directly propel the projectile 50, and can accelerate the projectile to >500m / s.

[0055] In this embodiment, since two cutting knives are provided, the rotation angle of each cutting blade is less than 180°, which shortens the cutting stroke, effectively reduces the cutting time, and enables the pellet cutting to be completed quickly, so that the pellet enters the plasma within the predicted rupture time. After each pellet 50 is cut, the driving motor in the reset unit drives the rotating shaft 143 to rotate, so that the thin rope 142 is retracted and wound around the rotating shaft 143, so that the metal block 16 is restored to a position relative to the spiral coil 15, and is ready for the next pellet cutting.

[0056] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A device for preparing in-situ condensation projectiles, comprising a projectile condensation component, a projectile separation component and a projectile launching component, wherein the projectile condensation component is sleeved on a condensation gun barrel (20) and is used to condense the gas in the condensation gun barrel (20) into a projectile (50); the projectile launching component is arranged at the entrance of the condensation gun barrel (20) and is used to accelerate the launching of the projectile (50); characterized in that: The projectile separation assembly includes a rotary cutting unit, which is arranged on the outside of the projectile (50) and is used to cut the projectile (50) and separate the projectile (50) from the condensation gun barrel (20); and also includes a cutting drive unit (10) for driving the rotary cutting unit to rotate.

2. The device for preparing in-situ condensation pellets according to claim 1, characterized in that: The cutting drive unit (10) comprises a spiral coil (15) and a metal block (16); the spiral coil (15) is connected to a condensing gun barrel (20); the metal block (16) is connected to a rotating cutting unit; the spiral coil (15) and the metal block (16) are positioned relative to each other; when the spiral coil (15) is energized, it generates a magnetic field and interacts with the metal block (16), thereby driving the rotating cutting unit to rotate.

3. The device for preparing in-situ condensation pellets according to claim 2, characterized in that: The rotary cutting unit is a cutting tube (30), the cutting tube (30) comprising a cutting portion (301) and a tube body (302) which are connected together, the cutting portion (301) being located at a condensation location of the projectile (50), and the tube body (302) being located at both ends of the cutting portion (301); the cutting portion (301) comprising cutting blades connected to the tube body (302) at both ends, and the cutting blades being distributed at intervals.

4. The device for preparing in-situ condensation pellets according to claim 3, characterized in that: The cutting drive unit (10) further comprises a chamber formed by a flange end cover (11), a chamber end cover (12) and a chamber side wall (13). The spiral coil (15) and the metal block (16) are both located in the chamber. A coil mounting plate (14) parallel to the cutting tube (30) is arranged on the inner side of the chamber side wall (13), the spiral coil (15) is mounted on the coil mounting plate (14), a square plate (17) parallel to the cutting tube (30) is arranged on the tube body (302), and the metal block (16) is mounted on the square plate (17); The coil mounting plate (14) and the square plate (17) are positioned opposite to each other, so that the spiral coil (15) and the metal block (16) are positioned opposite to each other.

5. The device for preparing in-situ condensation pellets according to claim 4, characterized in that: Each of the cutting drive units (10) comprises two sets of spiral coils (15) and metal blocks (16) that are positioned opposite to each other, and the two sets of spiral coils (15) and metal blocks (16) that are positioned opposite to each other are arranged symmetrically with respect to the center line of the cutting tube (30).

6. The device for preparing in-situ condensation pellets according to claim 4, characterized in that: The cutting drive unit (10) is connected to both ends of the condensing gun tube (20) and is symmetrically arranged relative to the projectile (50); An air inlet pipe (21) and a launch tube (22) are also provided at both ends of the condensing gun barrel (20); the flange end cover (11) is sleeved and installed on one end of the air inlet pipe (21) and the launch tube (22) close to the condensing gun barrel (20); the chamber side wall (13) is sleeved and installed on both ends of the condensing gun barrel (20); the flange end cover (11) and the chamber end cover (12) are connected together by bolts.

7. A device for preparing in-situ condensation pellets according to any one of claims 4 to 6, characterized in that: The cutting drive unit (10) further comprises a reset unit, the reset unit comprising a side plate (141), a rotating shaft (143) mounted on the side plate (141), and a thin rope (142) having one end connected to the rotating shaft (143), the side plate (141) being connected to the coil mounting plate (14) and being located on a side away from the spiral coil (15), the other end of the rotating shaft (143) being connected to the driving motor, The coil mounting plate (14) is provided with a through hole (140). The other end of the thin rope (142) passes through the through hole (140) and is connected to the metal block (16).

8. A method for preparing an in-situ condensation pellet, using the in-situ condensation pellet preparation device according to claim 7, characterized in that: After the pellet condensation assembly condenses into a pellet (50), a variable current is passed through the spiral coil (15), and the spiral coil (15) interacts with the metal block (16) to drive the cutting tube (30) to rotate, thereby driving the cutting blade on the cutting tube (30) to rotate and cut the pellet (50), so that the pellet (50) is separated from the condensation gun barrel (20), and then the pellet (50) is launched through the pellet launching assembly.

9. The method for preparing an in-situ condensation pellet according to claim 8, characterized in that: The rotation angle of each cutting blade is less than 180°.

10. The method for preparing an in-situ condensation pellet according to claim 9, characterized in that: After each cutting of the projectile (50), the driving motor in the reset unit drives the rotating shaft (143) to rotate, so that the thin rope (142) is retracted and wound around the rotating shaft (143), thereby restoring the metal block (16) to a position opposite to the spiral coil (15).

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