A condensing device and method for making ice column projectiles

Abstract

The application discloses a condensing device and a manufacturing method for ice column projectiles, and belongs to the technical field of ice column projectile manufacturing equipment. The application comprises a condensing assembly for condensing gas in a barrel; the condensing assembly comprises a mounting portion and a winding portion which are connected with each other, the mounting portion is sleeved on the barrel, and a heating wire is wound on the winding portion; the heating wire is used for temperature adjustment of the condensing assembly; a heating assembly is sleeved on the barrel and located on the side of the mounting portion, and is used for heating the barrel. The mounting portion comprises an upper mounting portion and a lower mounting portion; one end of the lower mounting portion is connected with the winding portion, and the other end is connected with the upper mounting portion. The heating assembly comprises a heat conduction component and a heating sheet arranged on the heat conduction component. The main purpose of the application is to control the size of the ice column projectile, and to realize efficient and reliable projectile preparation with controllable size.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ice column projectile manufacturing equipment, and more particularly to a condensing device for manufacturing ice column projectiles and a manufacturing method. BACKGROUND

[0002] Magnetic confinement controlled nuclear fusion is one of the most likely ways to achieve controlled nuclear fusion, and is also one of the important ways to solve human energy and environmental problems. With the continuous improvement of fusion device parameters, traditional particle injection technologies such as gas injection and ultrasonic molecular beam injection can only be deposited at the plasma boundary due to gas diffusion, and cannot meet the requirements of core particle injection.

[0003] The condensing projectile injection method has been considered as the main particle injection means for future fusion reactors due to its greater and faster density disturbance, deeper injection depth, and more particle mass deposition. However, how to stably manufacture solid projectiles with controllable particle numbers from low-melting-point gases required by the device (such as D2 and Ne) is a technical problem that needs to be overcome at home and abroad. Currently, for the preparation of large projectiles, in-situ condensation technology is mostly used, that is, the projectile raw gas is directly sublimed into a projectile at a certain position in the condensing gun tube, and then the projectile is ejected directly at the condensing position through some technical means.

[0004] CN111816329A discloses a device for preparing mixed frozen projectiles and a preparation method thereof, which comprises a gun barrel, a freezing device, a quick valve, an exhaust pipe and heating wires. The outer wall of the gun barrel is fixed with the freezing device in the middle, and a plurality of heating wires are also wrapped around the outer wall of the gun barrel, which are symmetrically arranged around the center position of the freezing device. The outer wall of the freezing device is also provided with heating wires. The quick valve is connected to the port of one end of the gun barrel through the exhaust pipe. However, in the specific technical implementation process, on the one hand, in order to enhance the heat conductivity between the gun barrel and the freezing device, the condensing gun barrel and the freezing device are generally welded together. However, in order to reduce the thermal resistance of the condensing gun barrel wall, a pipe with a relatively thin wall thickness is selected as much as possible, which greatly increases the difficulty of welding. On the other hand, the fixation of the heating wires on the gun barrel is also a difficult problem. The heating wires are often wrapped around the relatively small diameter gun barrel, which may cause the heating wires to be burned out due to uneven contact, and the stability of the projectile preparation cannot be guaranteed. SUMMARY

[0005] 1. Technical problem to be solved by the application

[0006] In view of at least some of the above problems in the prior art, the present application provides a condensing device for manufacturing ice column projectiles and a manufacturing method, which solves the problem of being unable to stably prepare projectiles.

[0007] 2. Technical solution

[0008] To achieve the above object, the technical scheme provided by the present application is as follows:

[0009] The condensing device for making ice column projectiles comprises a condensing assembly for condensing gas in a barrel, the condensing assembly comprises a mounting part and a winding part connected with each other, the condensing assembly is connected with a refrigeration device, and the refrigeration device transmits cold energy to the condensing assembly; the mounting part is sleeved on the barrel and comprises an upper mounting part and a lower mounting part; one end of the lower mounting part is connected with the winding part, and the other end is connected with the upper mounting part; a heating wire is wound on the winding part; the heating wire is used for adjusting the temperature of the condensing assembly; a heating assembly is sleeved on the barrel and located at the side of the mounting part; the heating assembly comprises a heat conducting part and a heating sheet arranged on the heat conducting part and used for heating the barrel.

[0010] Further, the upper mounting part and the lower mounting part are connected by bolts and the barrel is fixed in the mounting part.

[0011] Further, a through hole is formed in the lower mounting part and located at the connecting position of the lower mounting part and the winding part.

[0012] Further, the center line of the through hole is aligned with the barrel.

[0013] Further, a cold end temperature sensor is arranged on the mounting part and close to the barrel and used for measuring the temperature of the mounting part close to the barrel.

[0014] Further, a heat conducting sheet is arranged between the upper mounting part and the lower mounting part.

[0015] Further, the heat conducting part is divided into an upper heat conducting part and a lower heat conducting part; the upper heat conducting part or the lower heat conducting part extends out a semi-heat conducting part towards the side away from the mounting part.

[0016] Further, a heat conducting sheet is arranged between the upper heat conducting part and the lower heat conducting part.

[0017] Further, a hot end temperature sensor is arranged on the upper heat conducting part or the lower heat conducting part and close to the barrel.

[0018] The present application also provides a making method of ice column projectiles, which adopts the condensing device for making ice column projectiles, adjusts the temperature of the mounting part by the heating wire, so that the temperature reaches the condensing temperature of the low melting point gas injected in the barrel, the low melting point gas is condensed into ice columns in the barrel, the barrel at the outer end of the condensing area is heated by the heating sheet to melt the excess projectiles and reach the required size of the projectiles, so as to make the required ice column projectiles.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the technical scheme provided by the application has the following remarkable effects:

[0021] (1) The condensing device and manufacturing method for manufacturing ice column projectiles of the application divide the condensing assembly into an installation part and a winding part, the installation part is used for installing the barrel, the winding part is provided with heating wires for adjusting the temperature of the condensing assembly, the heating wires are no longer fixed on the barrel, so that the heating is no longer affected by the size and wall thickness of the barrel, the difficulty of welding the thin-walled barrel is avoided, and the stability of manufacturing the condensing ice column projectiles is improved.

[0022] (2) The condensing device and manufacturing method for manufacturing ice column projectiles of the application, the installation part includes an upper installation part and a lower installation part, the heat conducting part is divided into an upper heat conducting part and a lower heat conducting part, the positions of the installation part and the heat conducting part are convenient to install and adjust, and the condenser is convenient to disassemble, maintain and assemble; heat conducting sheets are arranged between the upper installation part and the lower installation part and between the upper heat conducting part and the lower heat conducting part, so that the cold energy of the condensing assembly can be effectively transmitted to the barrel, and the heat of the heat conducting part can be effectively transmitted to the barrel, and the efficiency of energy transmission is improved.

[0023] (3) The condensing device and manufacturing method for manufacturing ice column projectiles of the application, a through hole is arranged on the lower installation part at the position where the lower installation part is connected with the winding part, so that the cold energy transmitted to the barrel is more uniform, thereby avoiding that the cold energy is concentratedly transmitted to the barrel from the middle of the lower installation part along the winding part, and the condensation of the ice column projectiles is not uniform; a cold end temperature sensor is arranged on the installation part near the barrel, and a hot end temperature sensor is arranged on the heat conducting part, so that the temperatures of different positions can be monitored in real time, and timely adjustment is facilitated.

[0024] (4) The condensing device and manufacturing method for manufacturing ice column projectiles of the application, the temperature of the installation part is first adjusted by the heating wires, so that the temperature reaches the condensation temperature of the low-melting-point gas injected into the barrel, and the low-melting-point gas is condensed into ice columns in the barrel; the heat conducting part is heated by the heating sheet, and the barrel at the outer end of the condensing area is heated to melt the excess ice columns to the required size of the projectile, so that the high-efficiency, reliable and size-controllable projectile preparation is realized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the application;

[0026] Figure 2 It is an enlarged view of the installation part profile perpendicular to the barrel axis of the application;

[0027] Figure 3 It is an enlarged view of the heating assembly profile perpendicular to the barrel axis of the application;

[0028] Figure 4 It is an installation schematic diagram of the heat conducting sheet of the application.

[0029] The label in the schematic diagram: 1, barrel; 2, hot end temperature sensor; 3, cold end temperature sensor; 4, heat conducting part; 40, semi-heat conducting part; 5, mounting part; 50, through hole; 6, heating wire; 7, heating sheet; 8, heat conducting sheet; 9, winding part. DETAILED DESCRIPTION

[0030] In order to further understand the content of the present application, the present application is described in detail in combination with the drawings and examples.

[0031] As Figure 1 A condensing device for making ice column projectile, comprising a condensing assembly and a heating assembly. The condensing assembly is connected with a refrigeration device, the refrigeration device transmits cold quantity to the condensing assembly, and the condensing assembly is used for transmitting cold quantity to the barrel 1 to condense the gas in the barrel 1 into ice column. In the embodiment, the condensing assembly is not easy to be temperature controlled due to temperature fluctuation of the condensing assembly caused by the flow of the gas in the barrel 1 or other factors. The condensing assembly serves as a medium for transmitting cold quantity on one hand, and provides a position for installing the heating wire and the cold end temperature sensor on the other hand. The barrel 1 is a seamless stainless steel pipe with a wall thickness of 0.3-1mm and an inner diameter of 10-30mm, which is selected according to the requirement of projectile injection, and the inner surface of the pipe has a certain roughness in order to enhance the condensation effect. Since the barrel 1 is not fixed by welding, the wall thickness of the barrel 1 can be controlled below 1mm, avoiding the influence of the thick wall of the barrel 1 on heat conduction. The condensing assembly comprises a mounting part 5 and a winding part 9 connected with each other, the mounting part 5 is sleeved on the barrel 1, and the heating wire 6 is wound on the winding part 9. The heating wire 6 is used for adjusting the temperature of the condensing assembly. When a certain specific gas is injected into the barrel 1, the condensing assembly is heated to a temperature at which the gas can be condensed by heating the heating wire 6.

[0032] The heating wire 6 is a 0.1-1mm enameled nickel-chromium alloy wire, which is used for neutralizing excess cold quantity and realizing the temperature control of the mounting part 5 close to the barrel 1. In the specific embodiment, the length of the heating wire 6 is calculated according to the required resistance value of heating.

[0033] In combination Figure 1 And Figure 2The mounting part 5 includes an upper mounting part and a lower mounting part, both of which are made of high-thermal-conductivity copper. One end of the lower mounting part is connected to the winding part 9, and the other end is connected to the upper mounting part. A semicircular hole is formed in each of the upper mounting part and the lower mounting part. The upper mounting part and the lower mounting part are fixedly connected together by bolts, and the two semicircular holes are aligned to form a circular hole for mounting the barrel 1. The mounting part 5 is flat, and its thickness is determined according to the size of the ice column projectile. The winding part 9 is cylindrical and integrally connected to the lower mounting part. The heating wire 6 is wound around the cylindrical surface of the winding part 9. Therefore, the heating wire 6 is no longer fixed to the barrel 1, and the heating is no longer affected by the size and wall thickness of the barrel 1. The upper mounting part and the lower mounting part are connected by bolts, and the barrel 1 is fixed between the two mounting parts, thereby avoiding the welding difficulty caused by the thin wall of the barrel and improving the stability of the production of the ice column projectile.

[0034] To more evenly transfer cold energy to the barrel 1, a through hole 50 is formed in the lower mounting part at the connection between the lower mounting part and the winding part 9. Therefore, when the cold energy is transferred from the winding part 9 to the mounting part 5, it is not concentrated in the middle of the lower mounting part and transferred to the barrel 1, which causes uneven condensation of the ice column projectile. The through hole 50 can divide the cold energy transfer, so that the cold energy is transferred to the barrel 1 from both ends of the lower mounting part, thereby making the cold energy transfer more uniform. Otherwise, if the cold energy is directly transferred upward along the entire lower mounting part, the side of the barrel 1 close to the lower mounting part will cool faster than the other side, causing uneven temperature. The through hole 50 can be formed by punching and cutting, but it is not limited to this method. In this embodiment, the through hole 50 is a square hole, but in other embodiments, it can be a circular hole or a polygonal hole, and the shape of the through hole 50 is not limited.

[0035] To be able to monitor and measure the temperature of the condensing assembly in real time, a cold end temperature sensor 3 is installed on the condensing assembly. To make the temperature sensed by the cold end temperature sensor 3 closer to the condensation temperature of the gas in the barrel 1, the cold end temperature sensor 3 is arranged on the mounting part 5 and close to the barrel 1. In this embodiment, the cold end temperature sensor 3 is arranged on the upper mounting part and located in the middle of the barrel 1. The temperature measurement range of the cold end temperature sensor 3 is 5-100K, and it is fixed on the upper mounting part by screw fastening.

[0036] In this embodiment, a heat-conducting sheet 8 is arranged between the upper mounting part and the lower mounting part, which can effectively transfer the cold energy of the condensing assembly to the barrel and improve the energy transfer efficiency, thereby avoiding energy waste. As shown in Figure 4 , the heat-conducting sheet 8 covers the connecting surface between the upper mounting part and the lower mounting part, and the heat-conducting sheet 8 also covers the contact surface between the barrel 1 and the upper mounting part or the lower mounting part. Two heat-conducting sheets 8 are arranged between the upper mounting part and the lower mounting part, and are symmetrically arranged on both sides of the barrel 1 to cover the contact surface between the barrel 1 and the mounting part 5, thereby effectively transferring the cold energy to the barrel 1, Figure 4The schematic shape of the heat conducting sheet 8 arranged on one side of the barrel 1 is shown in the figure.

[0037] In combination Figure 1 and Figure 3 The heating assembly of the condensing device for making ice column projectiles is also arranged on the barrel 1 and located on the side of the mounting portion 5 for heating the barrel 1. In this embodiment, two sets of heating assemblies are arranged on the two sides of the mounting portion 5.

[0038] The heating assembly comprises a heat conducting member 4 and a heating sheet 7 arranged on the heat conducting member 4. The heating sheet 7 is arranged on the heat conducting member 4 and transmits heat to the barrel 1 through the heat conducting member 4. In this embodiment, the heating sheet 7 does not directly contact the barrel 1. On one hand, the barrel 1 is a circular arc surface, which limits direct contact and greatly reduces heat transmission efficiency. On the other hand, if the heating assembly also directly heats the barrel with heating wires, it is difficult to fix the heating wires on the barrel. The heat conducting member 4 is divided into an upper heat conducting member and a lower heat conducting member, which are both made of high-thermal-conductivity copper. Like the mounting portion 5, a semicircular hole is formed on the upper heat conducting member and the lower heat conducting member, and the upper heat conducting member and the lower heat conducting member are fixed and connected together by bolts, and the two semicircular holes are aligned to form a circular hole for mounting the barrel 1. Two heating sheets 7 are arranged on the opposite sides of the upper heat conducting member and the lower heat conducting member, respectively. The heating sheets 7 are used to heat the heat conducting member 4, and the heat conducting member 4 transmits heat to the barrel 1 to melt the ice column projectiles. The heat conducting member 4 is fixed by bolts, so its position can be adjusted along the barrel 1. When the ice column projectiles needed are relatively long, the heat conducting member 4 can be arranged at a relatively far position from the mounting portion 5. Conversely, when the ice column projectiles needed are relatively short, the heat conducting member 4 can be arranged at a relatively close position from the mounting portion 5. By adjusting the position of the heat conducting member 4, the size of the ice column projectiles can be easily changed. In this embodiment, the heating sheets 7 can be connected to any heating source, such as a heating circuit, which will not be listed here.

[0039] When the gas condenses in the barrel 1, the projectiles condensed near the barrel 1 are the most, and the projectiles condensed far from the barrel 1 are relatively less. Therefore, when the position far from the barrel 1 is heated, it does not need too much heat. The upper heat conducting member or the lower heat conducting member extends a semi-heat conducting member 40 on the side away from the mounting portion 5. The semi-heat conducting member 40 is not provided with a heating sheet, and the semi-heat conducting member 40 only surrounds the semicircular surface of the barrel 1, which only needs a small amount of heat to melt the condensed gas.

[0040] In order to better transfer energy, the heat conducting sheet 8 is arranged between the upper heat conducting part and the lower heat conducting part. The heat conducting sheet 8 is arranged between the upper heat conducting part and the lower heat conducting part, covers the connecting surface between the upper heat conducting part and the lower heat conducting part, and covers the contact surface between the barrel 1 and the upper heat conducting part or the lower heat conducting part. Two heat conducting sheets 8 are arranged between the upper heat conducting part and the lower heat conducting part, and are symmetrically arranged on both sides of the barrel 1, so as to cover the contact surface between the barrel 1 and the heat conducting part 4, thereby effectively transferring heat to the barrel 1.

[0041] The size of the heat conducting sheet 8 arranged on the heat conducting part 4 and the mounting part 5 is different. The size of the heat conducting sheet 8 can be cut according to the different positions where the heat conducting sheet 8 is arranged. The size of the heat conducting sheet 8 is determined according to the different roots. The heat conducting sheet 8 is a soft metal with stable chemical properties, low hardness and good ductility, such as indium and silver. The thickness of the heat conducting sheet 8 is 0.1-1mm, so as to reduce the heat loss between heat conduction.

[0042] In order to monitor and measure the temperature of the heat conducting part 4 in real time, the hot end temperature sensor 2 is arranged on the heat conducting part 4. In order to make the temperature sensed by the hot end temperature sensor 2 closer to the melting temperature of the gas in the barrel 1, the hot end temperature sensor 2 is arranged on the upper heat conducting part or the lower heat conducting part, and is close to the barrel 1. In the embodiment, the hot end temperature sensor 2 is arranged on the lower heat conducting part. The temperature measurement range of the hot end temperature sensor 2 is 50-200K. The hot end temperature sensor 2 is fixed on the lower heat conducting part by screw fastening.

[0043] In order to better understand the working principle of the application, the application further provides a manufacturing method of the ice column projectile. The manufacturing method of the ice column projectile is performed by using the condensing device of the application. First, the condensing assembly of the condensing device of the ice column projectile is arranged on the refrigerating machine. A low melting point gas is injected into the barrel 1 through both ends of the barrel 1. Because different gases have different condensing temperatures, the temperature of the mounting part 5 is adjusted by the heating wire 6 according to the condensing temperature of the different gases, so that the temperature reaches the condensing temperature of the low melting point gas injected into the barrel 1. The low melting point gas is condensed into ice column in the barrel 1. Then, the heat conducting part 4 is heated by the heating sheet 7, and the barrel 1 at the outer end of the condensing area is heated, so as to melt the excess projectiles, so as to reach the required size of the projectile, thereby manufacturing the required ice column projectile. In the embodiment, the low melting point gas injected into the barrel 1 is used to manufacture the ice column projectile, and is used for particle injection in the fusion device. Therefore, the low melting point gas is D2 and Ne, and the freezing point of the low melting point gas is very low, which is 10-60K.

[0044] In the manufacturing process, because the hot end temperature sensor 2 and the cold end temperature sensor 3 are arranged, the temperature of the heat conducting part 4 and the mounting part 5 can be conveniently adjusted according to the freezing temperature of a certain gas. Since the position of the heat conducting part 4 on the barrel 1 is adjustable, the size of the ice column projectile can be conveniently controlled by adjusting the position between the heat conducting part 4 and the mounting part 5, so that the high-efficiency and reliable size-controllable projectile preparation is realized.

[0045] The present application adopts the condensing assembly and the heating assembly, the reasonable arrangement of the heating wire, the heating sheet and the temperature sensor, well controls the temperature distribution of the condensing area in the barrel 1, realizes the desublimation of the low-melting point gas into the projectile in the barrel 1 and the effective control of the size of the projectile, ensures the long-time stable work of the condenser, meets the thin-wall condition required by the condensing barrel, solves the welding problem caused by the thin wall, facilitates the disassembly and maintenance of the condenser, and provides new technical support for the research and development of the condensing projectile injection system.

[0046] In addition, the design of the heating assembly facilitates the heat exchange between the heating sheet 7 and the barrel 1. Compared with the direct use of the heating wire wound on the barrel 1, on the one hand, the design of the heating assembly facilitates the fixation on the thin-wall barrel and the replacement of the components of the heating assembly, and on the other hand, the good and uniform heat contact avoids the peeling of the enamel layer caused by the local heat accumulation of the enamel heating wire, so that the short circuit caused by the heating wire is avoided. At present, the experimental test of the above-mentioned embodiment shows that the condenser does not have the temperature control failure of the condensing assembly and the heating assembly, and the components of the assembly do not have the damage condition.

[0047] The above description of the present application and its embodiments is illustrative and not restrictive, and the embodiment shown in the drawings is only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above description, without departing from the purpose of the present application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. A condensing apparatus for making ice column projectiles, characterized by, The application relates to a gun barrel cooling device. The gun barrel cooling device comprises a condensing assembly for condensing gas in a gun barrel (1), a heating assembly on the side of the condensing assembly, a cold end temperature sensor (3) on the condensing assembly, a hot end temperature sensor (2) on the heating assembly, and a heating wire (6) wound on the condensing assembly. The condensing assembly comprises a mounting part (5) and a winding part (9) connected with each other, and the condensing assembly is connected with a refrigeration device which transmits cold energy to the condensing assembly. The mounting part (5) is sleeved on the gun barrel (1) and comprises an upper mounting part and a lower mounting part. One end of the lower mounting part is connected with the winding part (9) and the other end is connected with the upper mounting part. The heating wire (6) is used for adjusting the temperature of the condensing assembly.

2. A condensing device for making ice slurry pellets according to claim 1, characterized in that: The heating assembly comprises a heat conducting part (4) and a heating sheet (7) arranged on the heat conducting part (4) and used for heating the gun barrel (1).

3. A condensing device for making ice slurry pellets according to claim 2, characterized in that: The heat conducting part (4) is divided into an upper heat conducting part and a lower heat conducting part.

4. A condensing device for making ice slurry pellets according to claim 3, characterized in that: The upper heat conducting part and the lower heat conducting part are sleeved on the gun barrel (1).

5. A condensing device for making ice slurry pellets according to claim 4, characterized in that: The cold end temperature sensor (3) is arranged on the mounting part (5) and is close to the gun barrel (1) and used for measuring the temperature of the mounting part (5) close to the gun barrel (1).

6. A condensing device for making ice slurry pellets according to any one of claims 1-5, characterized in that: The hot end temperature sensor (2) is arranged on the upper heat conducting part or the lower heat conducting part and is close to the gun barrel (1).

7. A condensing device for making ice slurry pellets according to claim 6, characterized in that: The upper mounting part and the lower mounting part are connected through bolts and the gun barrel (1) is fixed in the mounting part (5).

8. A manufacturing method of an ice column projectile, using the condensing device of any one of claims 1 to 7, characterized by, A through hole (50) is arranged on the lower mounting part and is located at the connecting position of the lower mounting part and the winding part (9). The center line of the through hole (50) is aligned with the gun barrel (1). A heat conducting sheet (8) is arranged between the upper heat conducting part and the lower heat conducting part. The upper heat conducting part or the lower heat conducting part extends out a semi-heat conducting part (40) away from the mounting part (5). The heat conducting sheet (8) is arranged between the upper heat conducting part and the lower heat conducting part. The temperature of the mounting part (5) is adjusted through the heating wire (6) so that the temperature reaches the condensation temperature of low-melting-point gas injected into the gun barrel (1) and the low-melting-point gas is condensed into ice columns in the gun barrel (1). The heating sheet (7) heats the heat conducting part (4) and melts the redundant bullets of the gun barrel (1) at the outer end of the condensing area to reach the required bullet size, thereby manufacturing the required ice column bullets.

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