Projectile injection device and control method

Abstract

The invention provides a projectile injection device and a control method, and relates to the technical field of fusion device manufacturing, the projectile injection device is used for injecting projectiles into a test chamber of a fusion device, and comprises a conveying structure in which a conveying channel is formed, and the outlet end of the conveying channel is communicated into the test chamber; the feeding structure comprises a shot storage part and a cam assembly, a shot storage space is formed in the shot storage part, shots are stored in the shot storage space, and at least part of the cam assembly extends into the shot storage part; at least part of the cam assembly is arranged to be capable of reciprocating so that the shot storage space can selectively communicate with the conveying channel, and the shots can be conveyed into the conveying channel. According to the bullet injection device, bullet injection can be evenly controlled, the adjusting performance of boundary current distribution and pressure gradient is improved, weakening or restraining of an edge local module is enhanced, the structure is simple, the setting cost can be reduced, and the using effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of fusion device manufacturing, and in particular to a pellet injection device and a control method applicable to the pellet injection device. Background Art

[0002] In magnetic confinement fusion devices, edge localized modes are a type of edge plasma instability that periodically erupts. Edge localized modes are a common plasma instability phenomenon in tokamak nuclear fusion devices, mainly occurring in the plasma edge region. Their instantaneous energy release can cause severe thermal load shock to the first wall, threatening the safety of the device operation and the life of the material.

[0003] To achieve steady-state high-confinement operation, edge localized modes must be suppressed or controlled. Existing magnetic confinement fusion devices can continuously inject lithium or boron pellets into the plasma boundary at a high repetition rate. This allows for the regulation of boundary current distribution and pressure gradients without significantly introducing impurity contamination, effectively weakening or suppressing the occurrence of edge localized modes. They can also optimize overall plasma performance by altering the radiation characteristics and ion transport behavior of the boundary region. However, existing pellet injection devices employ piezoelectric vibrations and other methods to achieve pellet injection. These vibrations cannot uniformly control pellet injection, resulting in poor regulation of boundary current distribution and pressure gradients, which in turn affects the weakening or suppression of edge localized modes. Furthermore, these devices are complex in structure and expensive to set up, leaving room for improvement. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art, such as the complex structure of the pellet injection device, high installation cost, inability to uniformly control the pellet injection, poor regulation performance of the boundary current distribution and pressure gradient, and thus affecting the weakening or suppression of the edge localized mode.

[0005] According to an embodiment of the present invention, the projectile injection device is used to inject projectiles into a test chamber of a fusion device, and includes: a conveying structure, a conveying channel is formed in the conveying structure, and the outlet end of the conveying channel is connected to the test chamber; a feeding structure, the feeding structure includes a projectile storage member and a cam assembly, the projectile storage member forms a projectile storage space, and the projectile storage space stores projectiles, at least a portion of the cam assembly extends into the projectile storage member, and at least a portion of the cam assembly is configured to be reciprocating so that the projectile storage space is selectively connected to the conveying channel to convey the projectile into the conveying channel.

[0006] According to some embodiments of the pellet injection device of the present invention, the cam assembly includes a cam body and a cam rod, one end of the cam rod is connected to the cam body, and the other end of the cam rod extends into the pellet storage member, and the cam body is suitable for driving the cam rod to reciprocate relative to the pellet storage member when rotating, so that the pellet storage space is selectively connected to the conveying channel.

[0007] According to some embodiments of the projectile injection device of the present invention, a limiting groove and a guide channel are further formed in the projectile storage member, the limiting groove is connected between the projectile storage space and the guide channel, and the other end of the cam rod extends to the limiting groove for selectively opening or closing the limiting groove.

[0008] According to some embodiments of the projectile injection device of the present invention, the cam rod is formed with a communication port, and the communication port is suitable for selectively communicating between the projectile storage space and the guide channel during the reciprocating motion of the cam rod.

[0009] According to some embodiments of the present invention, the pellet injection device comprises a first storage channel and a second storage channel, wherein the first storage channel and the second storage channel are spaced apart and distributed; The communication port is suitable for repeatedly connecting the first storage channel and the second storage channel to the guide channel in sequence during the reciprocating motion of the cam rod.

[0010] According to some embodiments of the pellet injection device of the present invention, the pellet storage space is connected to the upper side of the limiting groove, and the guide channel is connected to the lower side of the limiting groove.

[0011] According to some embodiments of the projectile injection device of the present invention, the conveying structure includes a high-pressure gas source component, which is used to supply high-pressure gas to the conveying channel, and the high-pressure gas pushes the projectile toward the testing chamber.

[0012] According to some embodiments of the present invention, the projectile injection device further includes a vacuum structure, at least part of the conveying channel is connected to the outside and forms a vacuum gap, the projectile is suitable for passing through the vacuum gap under the push of the high-pressure gas, and the vacuum structure is used to vacuum the vacuum gap.

[0013] According to some embodiments of the projectile injection device of the present invention, the vacuum structure includes a vacuum cavity and a pump group, the vacuum cavity is arranged outside the vacuum gap and is connected to the vacuum gap, and the pump group is selectively connected to the interior of the vacuum cavity to selectively vacuum the vacuum gap.

[0014] According to some embodiments of the projectile injection device of the present invention, the conveying channel includes a first pipe and a second pipe, the first pipe is connected to the high-pressure air source, the projectile storage space is connected to the top of the first pipe, the second pipe is connected to the test chamber, and the first pipe and the second pipe are separated to form the vacuum gap.

[0015] According to some embodiments of the projectile injection device of the present invention, a first control valve is provided in the first pipeline, and the first control valve is located between the high-pressure gas source and the outlet end of the projectile storage space.

[0016] The invention also proposes a control method for the projectile injection device.

[0017] According to a control method for a pellet injection device according to an embodiment of the present invention, the control method is applicable to any of the pellet injection devices described above, and the control method includes: The projectile is delivered into the delivery channel through the cam assembly; The high-pressure gas source is controlled to deliver high-pressure gas into the delivery channel to push the projectile to move toward the test chamber.

[0018] The control method of the pellet injection device according to some embodiments of the present invention further includes: evacuating the delivery channel when the pellet moves toward the testing chamber under the action of the high-pressure gas.

[0019] According to the pellet injection device of the embodiment of the present invention, a cam assembly is provided in the feeding structure, and at least a part of the cam assembly is set to be reciprocating so that the pellet storage space and the conveying channel are selectively connected, so that the pellet injection device can uniformly control the injection of pellets, improve the regulation performance of the boundary current distribution and the pressure gradient, and thus enhance the weakening or suppression of the edge localized mode. The structure is simple, the setting cost can be reduced, the use effect is better, and the scope of application is wider.

[0020] The control method of the pellet injection device has the same advantages as the above-mentioned pellet injection device over the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which: Figure 1 is a structural schematic diagram of a feeding structure according to an embodiment of the present invention; Figure 2 2 is a schematic structural diagram of a pellet injection device according to an embodiment of the present invention.

[0022] Reference numerals: Shot injection device 100, Feeding structure 1, projectile storage member 11, first storage channel 111, second storage channel 112, limiting groove 113, guide channel 114, projectile 12, cam assembly 13, driving member 131, cam body 132, sliding groove 133, cam rod 134, communication port 135, High-pressure gas source 21, first pipeline 22, first control valve 23, second pipeline 24, vacuum gap 25, Vacuuming structure 3 , vacuuming chamber 31 , pump group 32 , second control valve 33 , testing chamber 4 . DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] Reference below Figure 1-Figure 2The pellet injection device 100 according to an embodiment of the present invention is described. It has a simple structure, can reduce the setting cost, and can evenly control the injection of the pellet 12, improve the regulation performance of the boundary current distribution and pressure gradient, and further enhance the weakening or suppression of the edge localized mode to improve the reliability of use.

[0027] like Figure 1-Figure 2 As shown, a pellet injection device 100 according to one embodiment of the present invention is used to inject pellets 12 into a test chamber 4 of a fusion device, and includes: a conveying structure and a feeding structure 1.

[0028] A conveying channel is formed in the conveying structure, and the outlet end of the conveying channel is connected to the test chamber 4. The feeding structure 1 includes a pellet storage member 11 and a cam assembly 13. The pellet storage member 11 forms a pellet storage space, and pellets 12 are stored in the pellet storage space. At least a portion of the cam assembly 13 extends into the pellet storage member 11, and at least a portion of the cam assembly 13 is configured to reciprocate to selectively connect the pellet storage space with the conveying channel to convey pellets 12 into the conveying channel.

[0029] Among them, the projectile injection device 100 is used to inject the projectile 12 into the test chamber 4 of the fusion device. The fusion device may refer to a magnetic confinement fusion device. In the magnetic confinement fusion device, the edge localized mode mainly occurs in the edge area of the plasma, and its instantaneous energy release will cause serious thermal load shock to the inner wall of the fusion device, thereby threatening the safety of the operation of the fusion device and the life of the materials.

[0030] In this way, pellets 12 made of materials with lower atomic numbers such as solid lithium and boron can be delivered into the plasma boundary at a high repetition rate through the pellet injection device 100. The boundary current distribution and pressure gradient can be adjusted without significantly introducing impurity contamination, thereby effectively weakening or suppressing the occurrence of edge localized modes. The overall plasma performance can also be optimized by changing the radiation characteristics and ion transport behavior of the boundary area.

[0031] In addition, elements such as lithium and boron have strong surface adsorption and neutralization properties. Continuous injection of pellets 12 made of elements such as lithium and boron can form a dynamic covering layer between the plasma and the wall material, which helps to improve impurity recovery, control impurity sources and transport paths, and thus improve the purity of the combustion plasma while studying the impurity transport mechanism and its coupling relationship with the dynamic evolution of the edge localized mode, which has a wider range of applications.

[0032] Specifically, the pellet injection device 100 is provided with a conveying structure, in which a conveying channel is formed. The inner diameter of the conveying channel can be set according to the radial size of the pellet 12. The outlet end of the conveying channel is connected to the test chamber 4, and the pellet 12 can move along the conveying channel, and then be conveyed to the test chamber 4 through the conveying channel. The conveying structure can convey the pellet 12 by high-pressure gas or mechanical kinetic energy, etc. The setting method is flexible, and the inner diameter of the conveying channel needs to be set to be slightly larger than the radial size of the pellet 12, which can reduce the friction between the pellet 12 and the inner wall of the conveying channel to reduce kinetic energy loss, and can limit the conveying path of the pellet 12 to ensure the reliability of the pellet 12 conveying.

[0033] The pellet injection device 100 is provided with a feeding structure 1, in which pellets 12 can be stored, and the feeding structure 1 can transport the pellets 12 to the conveying channel of the conveying structure, and then transport them to the test chamber 4 through the conveying channel. The feeding structure 1 is provided with a pellet storage part 11 and a cam assembly 13, and a pellet storage space is formed in the pellet storage part 11. A plurality of pellets 12 can be stored in the pellet storage space, so that the feeding structure 1 can continuously transport the pellets 12 into the conveying channel, thereby ensuring the reliability of the delivery of the pellets 12.

[0034] Furthermore, the cam assembly 13 is spaced apart from the pellet storage space, and at least a portion of the cam assembly 13 extends toward the pellet storage space, and at least a portion of the cam assembly 13 can extend into the pellet storage member 11. When the cam assembly 13 is in operation, the portion of the cam assembly 13 extending into the pellet storage member 11 can perform reciprocating motion, thereby allowing the pellet storage space and the conveying channel to be selectively connected, so that the pellets 12 in the pellet storage space can be conveyed into the conveying channel, and then conveyed into the testing chamber 4 through the conveying channel.

[0035] In this way, when at least part of the cam assembly 13 reciprocates relative to the pellet storage part 11, the pellet storage space and the conveying channel can be regularly connected and blocked, so that the pellets 12 in the pellet storage space can be regularly conveyed to the conveying channel in sequence, thereby enabling the pellet injection device 100 to uniformly control the injection of the pellets 12, improve the regulation performance of the boundary current distribution and the pressure gradient, and thus enhance the weakening or suppression of the edge localized mode, and the cam assembly 13 has a simple structure, which can reduce the setting cost.

[0036] According to the pellet injection device 100 of the embodiment of the present invention, a cam assembly 13 is provided in the feeding structure 1, and at least a portion of the cam assembly 13 is set to be reciprocating so that the pellet storage space and the conveying channel are selectively connected, so that the pellet injection device 100 can uniformly control the injection of the pellets 12, improve the regulation performance of the boundary current distribution and the pressure gradient, and thus enhance the weakening or suppression of the edge localized mode. The structure is simple, the setting cost can be reduced, the use effect is better, and the scope of application is wider.

[0037] In some embodiments, the cam assembly 13 includes a cam body 132 and a cam rod 134, one end of the cam rod 134 is connected to the cam body 132, and the other end of the cam rod 134 extends into the pellet storage unit 11. The cam body 132 is suitable for driving the cam rod 134 to reciprocate relative to the pellet storage unit 11 when rotating, so that the pellet storage space is selectively connected to the conveying channel.

[0038] Specifically, at least a portion of the cam assembly 13 is arranged to be reciprocatable relative to the shot storage member 11, and as shown in FIG. Figure 1 As shown, the cam assembly 13 is provided with a cam body 132 and a cam rod 134. The cam rod 134 can be constructed as a straight rod, and one end of the cam rod 134 is movably connected to the cam body 132. In this embodiment, a sliding groove 133 can be provided at the circumferential edge of the cam body 132, and a sliding block is provided at one end of the cam rod 134, and the sliding block can be extended into the sliding groove 133, so that one end of the cam rod 134 is connected to the cam body 132 and can also slide relative to the circumferential edge of the cam body 132.

[0039] Furthermore, the other end of the cam rod 134 can extend into the pellet storage unit 11, and the cam assembly 13 can also be provided with a driving member 131, which is dynamically connected to the cam body 132, so that the driving member 131 can drive the cam body 132 to rotate when it is running. When the cam body 132 rotates, the size of one end of the cam body 132 is larger and the size of the other end is smaller, so that the distance between the cam body 132 and the pellet storage unit 11 also changes during the rotation process, thereby allowing the cam rod 134 driven by the cam body 132 to reciprocate in the pellet storage unit 11.

[0040] In this way, the cam rod 134 can be driven by the special structural characteristics of the cam body 132 to make the cam rod 134 reciprocate, thereby regularly connecting and blocking the projectile storage space and the conveying channel, so that the feeding structure 1 can convey the projectiles 12 into the conveying channel in sequence. The structure is simple, the setting cost is low, and the reliability of the projectile injection device 100 in injecting the projectiles 12 can be improved, so as to enhance the weakening or suppression of the edge localized mode.

[0041] In some embodiments, a limiting groove 113 and a guide channel 114 are also formed in the projectile storage element 11. The limiting groove 113 is connected between the projectile storage space and the guide channel 114. The other end of the cam rod 134 extends to the limiting groove 113 to selectively open or block the limiting groove 113.

[0042] Specifically, the pellet storage unit 11 is used to store pellets 12 and can transport the pellets 12 into a transport channel. Figure 1 As shown, the pellet storage element 11 further forms a limiting groove 113 and a guide channel 114. The limiting groove 113 is provided between the pellet storage space and the guide channel 114. The pellets 12 are stored in the pellet storage space, and the pellet storage space can be selectively connected to the guide channel 114 via the limiting groove 113, thereby allowing the pellets 12 in the pellet storage space to be selectively transported into the guide channel 114. The other end of the guide channel 114 can be connected to the transport channel. In this way, the pellets 12 in the pellet storage space can be transported into the guide channel 114 when the pellet storage space is connected to the guide channel 114 via the limiting groove 113, and then transported into the transport channel through the guide channel 114.

[0043] Furthermore, the other end of the cam rod 134 can extend into the limiting groove 113, that is, the end of the cam rod 134 away from the cam body 132 can extend into the limiting groove 113, so that when the other end of the cam rod 134 slides with the cam body 132, the other end can still reciprocate along the extension direction of the limiting groove 113, so that the movement trajectory of the cam rod 134 is a straight line, and during the reciprocating movement of the cam rod 134, the limiting groove 113 can be selectively opened or blocked, so that when the cam rod 134 moves relative to the limiting groove 113, the projectile storage space and the guide channel 114 can be selectively opened or blocked. The structure is simple and can ensure the uniformity of conveying the projectiles 12.

[0044] In addition, the cam body 132 is set to be symmetrical along the length direction, and the length direction of the cam body 132 is set to coincide with the extension direction of the limit slot 113, so that when the cam body 132 rotates clockwise or counterclockwise, the movement trajectory and movement frequency of the cam rod 134 are the same, ensuring reliability of use. In actual setting, the movement trajectory and movement frequency of the cam rod 134 can be adjusted by changing the shape of the cam body 132, and the setting cost is low and convenient.

[0045] In some embodiments, the cam rod 134 is formed with a communication port 135 , which is suitable for selectively communicating between the projectile storage space and the guide channel 114 during the reciprocating motion of the cam rod 134 .

[0046] Specifically, one end of the cam rod 134 away from the cam body 132 can extend into the limiting groove 113, and as shown in FIG. Figure 1 As shown, the cam rod 134 is formed with a connecting port 135, which is connected along the radial direction of the cam rod 134, and the extension direction of the connecting port 135 is the same as the distribution direction of the projectile storage space and the guide channel 114, that is, when the connecting port 135 of the cam rod 134 moves between the projectile storage space and the guide channel 114, one end of the connecting port 135 can be connected with the projectile storage space, and the other end of the connecting port 135 can be connected with the guide channel 114, so that the projectile 12 in the projectile storage space can be transported to the connecting port 135, and then transported to the guide channel 114 through the connecting port 135.

[0047] In this way, when the cam rod 134 reciprocates with the cam body 132, the connecting port 135 can also reciprocate with the cam rod 134, so that the connecting port 135 can selectively connect between the projectile storage space and the guide channel 114, thereby allowing the projectile storage space to regularly transport the projectiles 12 into the conveying channel, thereby improving the reliability of transporting the projectiles 12.

[0048] In some embodiments, the projectile storage space includes a first storage channel 111 and a second storage channel 112, and the first storage channel 111 and the second storage channel 112 are spaced apart and distributed, wherein the connecting port 135 is suitable for repeatedly connecting the first storage channel 111 and the second storage channel 112 to the guide channel 114 in succession during the reciprocating motion of the cam rod 134.

[0049] Specifically, the projectile storage space is used to store the projectiles 12, and as Figure 1 As shown, the projectile storage space is provided with a first storage channel 111 and a second storage channel 112. The first storage channel 111 and the second storage channel 112 can both be used to store projectiles 12. The first storage channel 111 and the second storage channel 112 are distributed separately, and the first storage channel 111 and the second storage channel 112 are distributed along the extension direction of the limiting groove 113, thereby increasing the storage capacity of the projectiles 12 and ensuring the transportation reliability.

[0050] Furthermore, the cam rod 134 can reciprocate along the limiting groove 113, so that the connecting port 135 of the cam rod 134 can also reciprocate along the limiting groove 113, and the first storage channel 111 and the second storage channel 112 are spaced apart and distributed along the limiting groove 113, so that the connecting port 135 can be connected with the first storage channel 111 and the second storage channel 112 respectively as the cam rod 134 moves, that is, during the reciprocating movement of the cam rod 134, the connecting port 135 can repeatedly connect the first storage channel 111 and the second storage channel 112 to the guide channel 114, so that the first storage channel 111 and the second storage channel 112 can convey the projectiles 12 into the guide channel 114 in turn, so as to increase the injection frequency of the feeding structure 1 to the projectiles 12 and realize stable feeding of the projectiles 12.

[0051] In some embodiments, the projectile storage space is connected to the upper side of the limiting groove 113 , and the guide channel 114 is connected to the lower side of the limiting groove 113 .

[0052] Specifically, the projectile storage space can selectively transport the projectile 12 to the guide channel 114 through the limiting groove 113, and as Figure 1 As shown, the pellet storage space is connected to the top of the limiting groove 113, and the guide channel 114 is connected to the bottom of the limiting groove 113. The pellet storage space is extended in the vertical direction, and the guide channel 114 is also extended in the vertical direction, that is, the lower end of the pellet storage space is connected to the top of the limiting groove 113, and the upper end of the guide channel 114 is connected to the bottom of the limiting groove 113, so that when the pellet storage space is connected with the guide channel 114 through the limiting groove 113, the pellets 12 in the pellet storage space can be transported to the limiting groove 113 under the action of gravity, and then transported to the guide channel 114. The pellets 12 in the guide channel 114 can also be transported to the transport channel under the action of gravity to save energy consumption of the pellet injection device 100.

[0053] In addition, the projectile storage space is configured to extend in the vertical direction, and the radial dimension of the projectile storage space is configured to be slightly larger than the radial dimension of the projectile 12, which can ensure the reliability of the downward conveying of the projectile 12, and enable multiple projectiles 12 to be arranged in sequence in the vertical direction in the projectile storage space, and then, after the projectile storage space is connected to the guide channel 114, multiple projectiles 12 can be conveyed downward in sequence under the action of gravity, ensuring uniformity of conveying.

[0054] In some embodiments, the conveying structure includes a high-pressure gas source 21 , which is used to supply high-pressure gas to the conveying channel, and the high-pressure gas pushes the projectile 12 toward the testing chamber 4 .

[0055] Specifically, the conveying structure can convey the pellets 12 in the conveying channel into the test chamber 4, and as shown in FIG. Figure 2As shown, the conveying structure is provided with a high-pressure air source component 21, the high-pressure air source component 21 and the test chamber 4 are respectively connected to the two ends of the conveying channel, and the feeding structure 1 is connected to the middle of the conveying channel, so that after the feeding structure 1 conveys the projectile 12 into the conveying channel, the high-pressure air source component 21 can convey the projectile 12 to the test chamber 4.

[0056] Furthermore, the high-pressure gas source component 21 can be constructed as a high-pressure gas tank, which stores high-pressure gas, and the high-pressure gas source component 21 can spray high-pressure gas into the conveying channel, so that the conveying channel has high-pressure gas sprayed from the high-pressure gas source component 21 toward the test chamber 4. After the feeding structure 1 conveys the projectile 12 into the conveying channel, the high-pressure gas sprayed by the high-pressure gas source component 21 can push the projectile 12 to move along the conveying channel toward the test chamber 4, and then the projectile 12 can be transported to the test chamber 4. By transporting the projectile 12 by high-pressure gas, the friction between the projectile 12 and the inner wall of the conveying channel can be reduced, thereby reducing energy loss and improving energy saving.

[0057] In addition, the connection point between the guide channel 114 and the conveying channel is arranged close to the high-pressure gas source 21, so that the high-pressure gas can push the projectile 12 after entering the conveying channel to ensure the pushing reliability.

[0058] In some embodiments, the pellet injection device 100 also includes a vacuum structure 3, at least part of the conveying channel is connected to the outside and forms a vacuum gap 25, the pellet 12 is suitable for passing through the vacuum gap 25 under the push of high-pressure gas, and the vacuum structure 3 is used to vacuum the vacuum gap 25.

[0059] Specifically, if Figure 1 As shown, the projectile injection device 100 is also provided with a vacuum structure 3, and at least part of the conveying channel can be provided with a vacuum gap 25, that is, the conveying channel can be provided as two spaced-apart pipes, or perforations can be provided on the conveying channel, so that the conveying channel can be connected to the outside through the vacuum gap 25. The vacuum gap 25 is located between the high-pressure air source 21 and the test chamber 4, and the vacuum gap 25 is located on the rear side of the connection between the guide channel 114 and the conveying channel along the direction of the airflow, so that the projectile 12 can pass through the vacuum gap 25 when entering the conveying channel and being pushed by the high-pressure airflow.

[0060] Furthermore, the vacuuming structure 3 can vacuum the vacuuming gap 25, so that when the high-pressure airflow pushes the projectile 12 through the vacuuming gap 25, the vacuuming structure 3 can vacuum the high-pressure airflow pushing the projectile 12 at the vacuuming gap 25 to reduce the vacuum degree to a reasonable range. The projectile 12 can continue to move toward the test chamber 4 under the action of inertia force, and when entering the test chamber 4, the surroundings of the projectile 12 are in a vacuum state, avoiding the introduction of other impurities and ensuring the reliability of weakening or suppressing the edge localized mode.

[0061] In some embodiments, the vacuum structure 3 includes a vacuum chamber 31 and a pump group 32. The vacuum chamber 31 is arranged outside the vacuum gap 25 and is connected to the vacuum gap 25. The pump group 32 is selectively connected to the interior of the vacuum chamber 31 to selectively vacuum the vacuum gap 25.

[0062] Specifically, the vacuum structure 3 is also provided with a vacuum chamber 31 and a pump group 32. The vacuum chamber 31 can be mounted outside the conveying channel, and the portion of the conveying channel having the vacuum gap 25 can be located in the vacuum chamber 31, so that the conveying channel can be connected with the vacuum chamber 31 through the vacuum gap 25, and the pump group 32 can be selectively connected with the vacuum chamber 31 to selectively vacuum the vacuum gap 25. That is, when the projectile 12 enters the conveying pipeline, the pump group 32 can be connected with the vacuum chamber 31, and then the pump group 32 can vacuum the vacuum chamber 31, so that the vacuum degree at the vacuum gap 25 is maintained within a reasonable range, thereby ensuring the reliability of the projectile 12.

[0063] In addition, if Figure 1 As shown, a second control valve 33 can be provided between the pump group 32 and the vacuum chamber 31. When the second control valve 33 is open, the pump group 32 and the vacuum chamber 31 can be connected. When the second control valve 33 is closed, the connection between the pump group 32 and the vacuum chamber 31 can be blocked, thereby improving the reliability of the pump group 32 in evacuating the vacuum chamber 31. In actual settings, the vacuum gap 25 can also be set as a vacuum hole, the vacuum hole is connected to the delivery channel, and the pump group 32 can be connected to the vacuum hole to evacuate the vacuum hole, which is flexible in setting.

[0064] In some embodiments, the conveying channel includes a first pipe 22 and a second pipe 24, the first pipe 22 is connected to the high-pressure air source 21, the projectile storage space is connected above the first pipe 22, and the second pipe 24 is connected to the test chamber 4. The first pipe 22 and the second pipe 24 are separated and form a vacuum gap 25.

[0065] Specifically, if Figure 1As shown, the conveying channel is provided with a first pipe 22 and a second pipe 24, one end of the first pipe 22 is connected to the high-pressure air source 21, and the other end extends toward the test chamber 4, one end of the second pipe 24 extends toward the high-pressure air source 21, and the other end is connected to the test chamber 4, the other end of the first pipe 22 and one end of the second pipe 24 are arranged opposite to each other, and a vacuum gap 25 can be formed between the other end of the first pipe 22 and one end of the second pipe 24, the projectile storage space is connected to the top of the first pipe 22, that is, the projectile 12 can be conveyed from the projectile storage space to the first pipe 22 under the action of gravity, and the high-pressure air source 21 can push the projectile 12 in the first pipe 22 to the second pipe 24, when passing through the vacuum gap 25, the vacuum degree around the projectile 12 can be reduced to a reasonable range, and the projectile 12 can continue to be conveyed to the test chamber 4 through the second pipe 24, the structure is simple, and the reliability of the projectile 12 conveyance can be guaranteed.

[0066] In addition, the gap width of the vacuum gap 25 is set to be smaller than the radial dimension of the projectile 12, so that the projectile 12 can cross the vacuum gap 25 under the action of inertia when passing through the vacuum gap 25, preventing the projectile 12 from slipping out of the vacuum gap 25, thereby ensuring the reliability of the projectile 12 transportation.

[0067] In some embodiments, a first control valve 23 is provided in the first pipeline 22 , and the first control valve 23 is located between the high-pressure gas source 21 and the outlet end of the projectile storage space.

[0068] Specifically, the delivery channel is provided with a first pipe 22 and a second pipe 24. The end of the first pipe 22 away from the test chamber 4 is connected to the high-pressure gas source 21. Figure 1 As shown, a first control valve 23 is also provided in the first pipeline 22. The first control valve 23 is located between the high-pressure air source component 21 and the outlet end of the projectile storage space, that is, the first control valve 23 can control the communication between the high-pressure air source component 21 and the first pipeline 22. When the first control valve 23 is opened, the high-pressure air source component 21 and the first pipeline 22 can be connected. When the first control valve 23 is closed, the communication between the high-pressure air source component 21 and the first pipeline 22 can be blocked.

[0069] In this way, after the feeding structure 1 conveys the projectile 12 into the first pipe 22, the first control valve 23 can be opened to allow the high-pressure gas source component 21 to spray high-pressure gas into the first pipe 22, thereby pushing the projectile 12 to move toward the test chamber 4. When the projectile 12 is conveyed, the first control valve 23 can be closed, thereby blocking the high-pressure gas source component 21 from conveying high-pressure gas into the first pipe 22, thereby saving energy consumption.

[0070] The present invention also provides a control method for the pellet injection device 100 .

[0071] According to the control method of the pellet injection device 100 of the embodiment of the present invention, the control method is applicable to any of the above-mentioned pellet injection devices 100, and the control method includes: The projectile 12 is delivered into the delivery channel by the cam assembly 13; The high-pressure gas source 21 is controlled to deliver high-pressure gas into the delivery channel to push the projectile 12 to move into the testing chamber 4 .

[0072] Specifically, the pellet injection device 100 is provided with a feeding structure 1, and the feeding structure 1 is provided with a cam assembly 13. The cam body 132 of the cam assembly 13 can be rotated under the drive of the driving member 131, and then the cam rod 134 can be driven to reciprocate. The feeding structure 1 is also provided with a pellet storage member 11. The pellet storage space of the pellet storage member 11 can store multiple pellets 12, and one end of the cam rod 134 can extend into the pellet storage member 11, so that the cam rod 134 can transport the pellets 12 in the pellet storage space to the guide channel 114 under the action of gravity when reciprocating, and then the pellets 12 in the guide channel 114 can be transported to the conveying channel under the action of gravity.

[0073] Furthermore, the conveying channel is connected to the high-pressure gas source component 21, and the high-pressure gas source component 21 can spray high-pressure gas into the conveying channel, so that the high-pressure gas can push the projectile 12 in the conveying channel. The test chamber 4 is connected to the other end of the conveying channel, so that the high-pressure gas can push the projectile 12 to move toward the test chamber 4. The structure is simple, which can ensure the reliability of the conveying of the projectile 12, and the projectile 12 is conveyed through the cam assembly 13, which can stably feed the projectile 12 and ensure the uniform injection of the projectile 12.

[0074] According to the control method of the pellet injection device 100 of the embodiment of the present invention, a cam assembly 13 is provided in the feeding structure 1, and at least a part of the cam assembly 13 is set to be reciprocating so that the pellet storage space and the conveying channel are selectively connected, so that the pellet injection device 100 can uniformly control the injection of the pellets 12, improve the regulation performance of the boundary current distribution and the pressure gradient, and further enhance the weakening or suppression of the edge localized mode. The structure is simple, the setting cost can be reduced, the use effect is better, and the scope of application is wider.

[0075] In some embodiments, the method further includes: when the pellet 12 moves toward the testing chamber 4 under the action of the high-pressure gas, the conveying channel is vacuumed.

[0076] Specifically, the driving member 131 drives the cam body 132 to rotate, and then drives the cam rod 134 to perform reciprocating motion to push the projectile 12 into the conveying pipe, and each time the cam body 132 rotates one circle, the cam rod 134 can drive two projectiles 12 to fall into the conveying pipe. By controlling the rotation speed of the cam body 132, the frequency of injecting the projectiles 12 can be controlled. When the projectile 12 falls into the first pipe 22, the first control valve 23 and the high-pressure gas source 21 are opened, so that the high-pressure gas can push the projectile 12 to move toward the test chamber 4. At the same time, the second control valve 33 and the pump group 32 are opened, so that the pump group 32 can vacuum the vacuum chamber 31, so that the vacuum degree at the vacuum gap 25 can be reduced to a reasonable range, thereby improving the reliability of use.

[0077] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0078] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A pellet injection device (100), characterized in that: The pellet injection device (100) is used to inject pellets (12) into a test chamber (4) of a fusion device, and comprises: A conveying structure, wherein a conveying channel is formed in the conveying structure, and an outlet end of the conveying channel is connected to the test chamber (4); A feeding structure (1) includes a pellet storage member (11) and a cam assembly (13), wherein the pellet storage member (11) forms a pellet storage space, wherein pellets (12) are stored in the pellet storage space, at least a portion of the cam assembly (13) extends into the pellet storage member (11), and at least a portion of the cam assembly (13) is configured to be reciprocating so as to selectively connect the pellet storage space with the conveying channel, thereby conveying the pellets (12) into the conveying channel.

2. The pellet injection device (100) according to claim 1, characterized in that: The cam assembly (13) comprises a cam body (132) and a cam rod (134), one end of the cam rod (134) is connected to the cam body (132), and the other end of the cam rod (134) extends into the shot storage member (11), and the cam body (132) is suitable for driving the cam rod (134) to reciprocate relative to the shot storage member (11) when rotating, so that the shot storage space is selectively connected to the conveying channel.

3. The pellet injection device (100) according to claim 2, characterized in that: A limiting groove (113) and a guide channel (114) are also formed in the projectile storage element (11), wherein the limiting groove (113) is connected between the projectile storage space and the guide channel (114), and the other end of the cam rod (134) extends to the limiting groove (113) for selectively opening or closing the limiting groove (113).

4. The pellet injection device (100) according to claim 3, characterized in that: The cam rod (134) is formed with a communication port (135), and the communication port (135) is suitable for selectively communicating between the projectile storage space and the guide channel (114) during the reciprocating motion of the cam rod (134).

5. The pellet injection device (100) according to claim 4, characterized in that: The projectile storage space comprises a first storage channel (111) and a second storage channel (112), wherein the first storage channel (111) and the second storage channel (112) are spaced apart and distributed; The communication port (135) is suitable for repeatedly connecting the first storage channel (111) and the second storage channel (112) to the guide channel (114) in sequence during the reciprocating motion of the cam rod (134).

6. The pellet injection device (100) according to claim 3, characterized in that: The projectile storage space is connected to the upper portion of the limiting groove (113), and the guide channel (114) is connected to the lower portion of the limiting groove (113).

7. The pellet injection device (100) according to claim 1, characterized in that The conveying structure comprises a high-pressure gas source component (21), and the high-pressure gas source component (21) is used to supply high-pressure gas to the conveying channel, and the high-pressure gas pushes the projectile (12) toward the test chamber (4).

8. The pellet injection device (100) according to claim 7, characterized in that: It also includes a vacuum pumping structure (3), at least a portion of the conveying channel is communicated with the outside and forms a vacuum pumping gap (25), the projectile (12) is suitable for passing through the vacuum pumping gap (25) under the pushing action of the high-pressure gas, and the vacuum pumping structure (3) is used to vacuum the vacuum pumping gap (25).

9. The pellet injection device (100) according to claim 8, characterized in that: The vacuum pumping structure (3) comprises a vacuum pumping cavity (31) and a pump group (32). The vacuum pumping cavity (31) is sleeved outside the vacuum pumping gap (25) and communicates with the vacuum pumping gap (25). The pump group (32) selectively communicates with the interior of the vacuum pumping cavity (31) to selectively vacuum the vacuum pumping gap (25).

10. The pellet injection device (100) according to claim 8, characterized in that: The conveying channel includes a first pipe (22) and a second pipe (24), the first pipe (22) is connected to the high-pressure gas source (21), the projectile storage space is connected above the first pipe (22), the second pipe (24) is connected to the test chamber (4), and the first pipe (22) and the second pipe (24) are spaced apart to form the vacuum gap (25).

11. The pellet injection device (100) according to claim 10, characterized in that: A first control valve (23) is provided in the first pipeline (22), and the first control valve (23) is located between the high-pressure gas source component (21) and the outlet end of the projectile storage space.

12. A control method for a pellet injection device (100), characterized in that: The control method is applicable to the pellet injection device (100) according to any one of claims 1 to 11, and the control method comprises: The projectile (12) is conveyed into the conveying channel via a cam assembly (13); The high-pressure gas source component (21) is controlled to deliver high-pressure gas into the delivery channel to push the projectile (12) to move into the test chamber (4).

13. The control method of the pellet injection device (100) according to claim 12, characterized in that: Also includes: When the projectile (12) moves toward the testing chamber (4) under the action of the high-pressure gas, the conveying channel is evacuated.

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