Jet mechanism for neutron target and neutron source system

Abstract

The invention relates to the technical field of neutron targets and discloses a jet flow mechanism for a neutron target and a neutron source system.The jet flow mechanism for the neutron target comprises a jet flow plate and a flow blocking assembly, the jet flow plate is provided with jet flow holes, the flow blocking assembly is installed on the jet flow holes, the flow blocking assembly comprises an elastic flow blocking piece, and the elastic flow blocking piece is installed on the jet flow holes. The elastic flow blocking piece has a closed state for closing the jet flow hole and an open state for opening the jet flow hole, in the closed state, the initial elastic force of the elastic flow blocking piece is larger than the pressure of the heat exchange medium on the elastic flow blocking piece, and in the open state, the initial elastic force of the elastic flow blocking piece is smaller than the pressure of the heat exchange medium on the elastic flow blocking piece. The jet mechanism for the neutron target can solve the technical problem that the pressure of the heat exchange medium is too large, and the flow and the flow velocity of the heat exchange medium can be adjusted on the premise that the pressure of the heat exchange medium does not damage the neutron target by installing the flow blocking assembly in the jet hole.

Description

Technical Field

[0001] The present invention relates to the technical field of neutron targets, in particular to a jet mechanism and a neutron source system for neutron targets. Background Art

[0002] In the field of neutron target technology, the target piece is mainly bombarded with a beam to generate a nuclear reaction to produce the required neutrons, which are then used in detection, imaging, medical treatment and other fields. However, the nuclear reaction of the neutron target will also generate a large amount of heat. Therefore, in order to ensure the safe operation of the neutron target at high power, the target needs to be continuously and efficiently dissipated. The traditional heat dissipation method is to add a direct current channel in the neutron target, and enhance the heat exchange capacity of the neutron target by increasing the heat exchange area and increasing the local flow rate and flow rate. However, increasing the local flow rate and flow rate is achieved by increasing the pressure of the heat exchange medium, that is, increasing the pressure of the heat exchange medium can increase the flow rate and flow velocity of the heat exchange medium. However, a heat exchange medium with excessive pressure will damage the neutron target.

[0003] In the related art, how to adjust the flow rate and flow velocity of the heat exchange medium while ensuring that the pressure of the heat exchange medium will not damage the neutron target is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a jet mechanism for a neutron target and a neutron source system, wherein the jet mechanism for a neutron target can adjust the flow rate and flow velocity of the heat exchange medium under the premise that the pressure of the heat exchange medium does not damage the neutron target by installing a flow blocking component in the jet hole.

[0005] The jet mechanism for neutron target of the present invention comprises:

[0006] A jet plate, wherein the jet plate is provided with jet holes;

[0007] A baffle assembly, wherein the baffle assembly is mounted on the jet hole, the baffle assembly includes an elastic baffle, wherein the elastic baffle is mounted on the jet hole, and the elastic baffle has a closed state for closing the jet hole and an open state for opening the jet hole, wherein in the closed state, an initial elastic force of the elastic baffle is greater than a pressure of a heat exchange medium on the elastic baffle, and in the open state, an initial elastic force of the elastic baffle is less than a pressure of the heat exchange medium on the elastic baffle.

[0008] Optionally, there are a plurality of jet holes and a plurality of elastic baffles, and the jet holes correspond to the elastic baffles one by one, wherein the elastic coefficient of the elastic baffle close to the edge of the jet plate is greater than the elastic coefficient of the elastic baffle away from the edge of the jet plate.

[0009] In addition to solving the technical problem of how to make the jet plate automatically adjust the fluid pressure and flow rate of the jet on the target according to the pressure of the heat exchange medium so as not to damage the target structure, this solution can also realize that the jet pressure and flow rate of each jet hole can be automatically adjusted according to the different elastic coefficients, thereby achieving effective heat dissipation, improving the accuracy and adaptability of heat dissipation control, and improving the heat dissipation effect.

[0010] Optionally, the elastic baffle is an elastic baffle plate, which includes a supporting portion and an elastic portion connected to each other, the edge of the supporting portion is connected to the inner wall of the jet hole, and in the closed state, the edge of the elastic portion abuts against the inner wall of the jet hole, the supporting portion and the elastic portion cooperate with each other to jointly close the jet hole, and in the open state, the edge of the elastic portion is away from the inner wall of the jet hole.

[0011] Optionally, the elastic coefficient calculation formula of each elastic flow blocking member is:

[0012] E=Ae Br2 ;

[0013] Wherein, E is the elastic coefficient of the elastic baffle; r is the beam spot radius; A is related to the beam spot radius and the total beam spot power; and B is related to the beam spot radius and the total beam spot power.

[0014] Optionally, an angle between a horizontal plane where the elastic baffle is located and a radial cross section of the jet hole is greater than or equal to 0° and less than 90°.

[0015] Optionally, the flow blocking component further includes:

[0016] A torsion spring, wherein a first torsion arm of the torsion spring is connected to the support portion, and a second torsion arm of the torsion spring is connected to the elastic portion;

[0017] A support rod, the side surface of the support rod is attached to the elastic part, the middle part of the support rod is connected to the second torsion arm of the torsion spring, and the length direction of the support rod is orthogonal to the length direction of the second torsion arm of the torsion spring.

[0018] Optionally, the elastic choke is an elastic choke nozzle, and the elastic choke nozzle includes:

[0019] A mounting ring, the mounting ring being mounted at the inlet of the jet hole;

[0020] An elastic conical wall, the bottom edge of which is connected to the mounting ring, the top of which is provided with a pressure opening, in the closed state, the elastic conical wall contracts inwardly to close the pressure opening, and in the open state, the elastic conical wall expands outwardly to open the pressure opening.

[0021] Optionally, the elastic choke nozzle further comprises:

[0022] At least three elastic rods, the side surfaces of the elastic rods are attached to the outer wall of the elastic conical wall, the length direction of the elastic rods is in the same plane as the axial direction of the elastic conical wall, and the elastic rods extend to the pressure opening, wherein at least three of the elastic rods are arranged in a circular array.

[0023] Optionally, the choke assembly further comprises an annular spring, the inner side of which is tightly buckled on the elastic rod.

[0024] This calculation formula can be used to conveniently calculate the elastic coefficient of each elastic baffle, so that the jet pressure and flow rate of each jet hole can be automatically adjusted according to the different elastic coefficients, thereby achieving effective heat dissipation, improving the accuracy and adaptability of heat dissipation control, and improving the heat dissipation effect.

[0025] Another neutron source system of the present invention comprises the above-mentioned jet mechanism for neutron target. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional schematic diagram of a jet mechanism for a neutron target in the first embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the flow-blocking component in the first embodiment of the present invention.

[0028] Figure 3 It is a bottom view schematic diagram of the baffle assembly in the first embodiment of the present invention.

[0029] Figure 4 It is a cross-sectional schematic diagram of a jet mechanism for a neutron target in the second embodiment of the present invention.

[0030] Figure 5 It is a schematic diagram of the flow-blocking component in the second embodiment of the present invention.

[0031] Figure markings: 1000 - jet mechanism for neutron target, 100 - jet plate, 110 - jet hole, 200 - choke assembly, 210 - elastic choke, 210a - elastic choke plate, 211a - support portion, 212a - elastic portion, 220a - torsion spring, 221a - first torsion arm, 222a - second torsion arm, 230a - support rod, 210b - elastic choke nozzle, 211b - mounting ring, 212b - elastic conical wall, 213b - elastic rod, 220b - annular spring. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] The following describes a jet mechanism 1000 for a neutron target according to an embodiment of the present invention with reference to the accompanying drawings. Figures 1 to 5 As shown, a jet mechanism 1000 for a neutron target according to an embodiment of the present invention includes a jet plate 100 and a baffle assembly 200 .

[0034] The jet plate 100 is provided with a jet hole 110, and the baffle assembly 200 is installed on the jet hole 110. The baffle assembly 200 includes an elastic baffle 210, and the elastic baffle 210 is installed on the jet hole 110. The elastic baffle 210 has a closed state in which the jet hole 110 is closed and an open state in which the jet hole 110 is opened. In the closed state, the initial elastic force of the elastic baffle 210 is greater than the pressure of the heat exchange medium on the elastic baffle 210. In the open state, the initial elastic force of the elastic baffle 210 is less than the pressure of the heat exchange medium on the elastic baffle 210.

[0035] According to the jet mechanism 1000 for neutron target in the specific embodiment of the present invention, by installing the elastic baffle 210 in the jet hole 110 and adjusting the pressure of the heat exchange medium, the elastic baffle 210 can close the jet hole 110 or open the jet hole 110. At the same time, in the open state, the area of ​​the jet hole 110 opened by the elastic baffle 210 can be adjusted according to the pressure of the heat exchange medium, that is, under the action of the elastic baffle 210, by adjusting the pressure of the heat exchange medium, the flow rate and flow velocity can be flexibly adjusted to achieve a better cooling effect.

[0036] like Figures 1 to 5 As shown, in order to make the technical solution of the present application easier to understand, the technical solution of the present application is described in more detail below with reference to a specific embodiment of a jet mechanism 1000 for a neutron target.

[0037] In some specific embodiments, Figure 1 and Figure 3 As shown, the jet plate 100 is provided with a jet hole 110. By spraying a heat exchange medium toward the neutron target through the jet hole 110, the heat dissipation capacity of the neutron target can be enhanced, thereby efficiently reducing the surface temperature of the neutron target, ensuring the safe operation of the neutron target under a high beam current, improving the service safety of the neutron target, and obtaining a higher neutron yield.

[0038] In some specific embodiments, Figure 1 and Figure 3As shown, the blocking assembly 200 is installed on the jet hole 110, and the blocking assembly 200 includes an elastic blocking member 210, which is installed on the jet hole 110. The elastic blocking member 210 has a closed state in which the jet hole 110 is closed and an open state in which the jet hole 110 is opened. In the closed state, the initial elastic force of the elastic blocking member 210 is greater than the pressure of the heat exchange medium on the elastic blocking member 210, and in the open state, the initial elastic force of the elastic blocking member 210 is less than the pressure of the heat exchange medium on the elastic blocking member 210. Specifically, by installing the elastic blocking member 210 in the jet hole 110, the pressure of the heat exchange medium can act on the elastic blocking member 210, so that the elastic blocking member 210 can be switched between the open state and the closed state, that is, by adjusting the pressure of the heat exchange medium, the elastic blocking member 210 can close the jet hole 110 or open the jet hole 110. At the same time, in the open state, the area of ​​the jet hole 110 opened by the elastic baffle 210 can be adjusted according to the pressure of the heat exchange medium. That is, under the action of the elastic baffle 210, by adjusting the pressure of the heat exchange medium, the flow rate and flow velocity can be flexibly adjusted to achieve a better cooling effect.

[0039] In some specific embodiments, there are multiple jet holes 110, and there are multiple baffle assemblies 200, and the jet holes 110 correspond to the baffle assemblies 200 one by one, wherein the elastic coefficient of the elastic baffle 210 near the edge of the jet plate 100 is greater than the elastic coefficient of the elastic baffle 210 far from the edge of the jet plate 100. Specifically, when the jet plate 100 is provided with multiple jet holes 110, the elastic baffles 210 in the jet holes 110 may be different. When the beam intensity is small, the heat in the neutron target is small, and a heat exchange medium with a small pressure can be used to dissipate the heat of the neutron target, that is, the pressure of the heat exchange medium is small, the jet holes 110 located in the middle of the jet plate 100 are opened, and the jet holes 110 near the edge of the jet plate 100 are closed. As the beam intensity increases and the beam bombardment surface increases, the pressure of the heat exchange medium can be increased so that the jet holes 110 from the center of the jet plate 100 to the edge of the jet plate 100 are gradually opened.

[0040] In some specific embodiments, a plurality of jet holes 110 are radially distributed on the jet plate 100 with the center of the jet plate 100 as a dot, wherein the elastic coefficient of the elastic baffle 210 close to the edge of the jet plate 100 is greater than the elastic coefficient of the elastic baffle 210 far from the edge of the jet plate 100. Specifically, when the pressure of the heat exchange medium increases to a certain value, the jet hole 110 located at the center of the jet plate 100 opens first. As the pressure of the heat exchange medium increases, the opening of the jet hole 110 located at the center of the jet plate 100 becomes larger, that is, the flow rate and flow velocity of the jet hole 110 located at the center of the jet plate 100 increase, and at the same time, the jet plate 100 components from the center of the jet plate 100 to the edge of the jet plate 100 are opened, and as the pressure of the heat exchange medium increases, the opening of the jet hole 110 also increases.

[0041] This embodiment can be applicable to different beam distribution types, such as Gaussian distribution or flat plate distribution. The jet pressure and flow rate of each jet hole can be automatically adjusted to achieve effective heat dissipation, improve the accuracy and adaptability of heat dissipation control, and improve the heat dissipation effect.

[0042] In some specific embodiments, the elastic coefficient of each elastic spoiler 210 is related to the distribution of the beam spot, wherein the elastic coefficient of each elastic spoiler 210 is:

[0043]

[0044] Wherein, E is the elastic coefficient of the elastic baffle 210; r is the beam spot radius; A is related to the beam spot radius and the total power of the beam spot; and B is related to the beam spot radius and the total power of the beam spot.

[0045] Specifically, formula (1) is based on the fact that the elastic coefficient E of the elastic baffle 210 is inversely proportional to the heat flux density P. And the relationship between heat flux P and beam spot radius r Obtained, where k is a constant determined based on empirical values.

[0046] In this embodiment, the beam spot radius r is 60mm, the total power is 32KW, A and B can be obtained by the beam spot radius and the total power of the beam spot, and A=7557068, B=-677, so the heat flux density can be obtained Then the elastic coefficient of the elastic baffle 210 is in k is a constant determined based on experience.

[0047] Taking the first specific embodiment as an example, the technical solution of the present application is further described in detail.

[0048] In some specific embodiments, Figures 1 to 3As shown, the elastic baffle 210 is an elastic baffle plate 210a, and the elastic baffle plate 210a includes a supporting portion 211a and an elastic portion 212a connected to each other. The edge of the supporting portion 211a is connected to the inner wall of the jet hole 110. In the closed state, the edge of the elastic portion 212a abuts against the inner wall of the jet hole 110. The supporting portion 211a and the elastic portion 212a cooperate with each other to jointly close the jet hole 110. In the open state, the edge of the elastic portion 212a is away from the inner wall of the jet hole 110. Specifically, under the pressure of the heat exchange medium, the pressure of the heat exchange medium on the elastic portion 212a is greater than the initial elastic force of the elastic portion 212a, and the elastic portion 212a will undergo elastic deformation, and the elastic portion 212a will bend downward, so that a gap will be formed between the elastic portion 212a and the inner wall of the jet hole 110, and the heat exchange medium can flow through the gap. As the pressure of the heat exchange medium on the elastic part 212a increases, the gap between the elastic part 212a and the inner wall of the jet hole 110 will also increase, so that the flow rate and flow rate of the heat exchange medium will also increase. That is, by adjusting the pressure of the heat exchange medium, the flow rate and flow rate of the heat exchange medium can be adjusted under the action of the elastic baffle 210a. The pressure of the heat exchange medium on the elastic part 212a is less than the initial elastic force of the elastic part 212a, and the edge of the elastic part 212a will still abut against the inner wall of the jet hole 110 to block the flow of the heat exchange medium.

[0049] In some specific embodiments, Figures 1 to 3 As shown, the elastic baffle plate 210a is detachably mounted on the jet hole 110 to facilitate maintenance and replacement of the elastic baffle plate 210a.

[0050] In some specific embodiments, Figures 1 to 3 As shown, the angle between the horizontal plane where the elastic baffle plate 210a is located and the radial cross section of the jet hole 110 is greater than or equal to 0° and less than 90°. Specifically, the installation angle of the elastic baffle plate 210a can be any angle. In other words, the elastic baffle plate 210a can be horizontal or inclined.

[0051] In some specific embodiments, Figures 1 to 3As shown, the first torsion arm 221a of the torsion spring 220a is connected to the support portion, and the second torsion arm 222a of the torsion spring is connected to the elastic portion. Specifically, under the pressure of the heat exchange medium, the pressure of the heat exchange medium on the elastic portion 212a may be too large, which may cause the elastic deformation of the elastic portion 212a to exceed the limit deformation, thereby causing irreversible damage to the elastic portion. Connecting the first torsion arm 221a of the torsion spring 220a to the support portion and the second torsion arm 222a of the torsion spring to the elastic portion can provide an external elastic force to the elastic portion 212a, thereby preventing the elastic deformation of the elastic portion 212a from exceeding the limit deformation, thereby preventing damage to the elastic portion 212a. It should be noted that the torsion spring 220a can be located on the pressure surface of the elastic baffle 210a or the pressure back surface of the elastic baffle 210a, and the pressure surface can be understood as the surface on which the pressure of the heat exchange medium acts on the elastic baffle 210a.

[0052] In some specific embodiments, in order to prevent the elastic deformation of the elastic portion 212 a from exceeding a limit deformation, an external elastic force is provided by adding a spring sheet or other means.

[0053] In some specific embodiments, Figures 1 to 3 As shown, the side of the support rod 120a is attached to the elastic part 212a, the middle part of the support rod 120a is connected to the second torsion arm 222a of the torsion spring 200a, and the length direction of the support rod 120a is orthogonal to the length direction of the second torsion arm 222a of the torsion spring 220a. Specifically, the side of the support rod 120a is attached to the elastic part 212a, and the support rod 120a can serve as the skeleton of the elastic part 212a. When the second torsion arm 222a of the torsion spring 220a can provide external supporting force to the elastic part 212a, the second torsion arm 222a of the torsion spring 220a is connected to the middle part of the support rod 120a, and the support rod 120a disperses the supporting force of the second torsion arm 222a, so as to avoid the elastic part 212a from being locally deformed due to excessive local supporting force.

[0054] Taking the second specific embodiment as an example, the technical solution of the present application is further described in detail.

[0055] In some specific embodiments, Figure 4 and Figure 5 As shown, the elastic choke 210 is an elastic choke nozzle 210b, which includes a mounting ring 211b and an elastic conical wall 212b. The mounting ring 211b is mounted at the inlet of the jet hole 110, and the mounting ring 211b is mainly used to provide support force for the elastic choke nozzle 210b.

[0056] In some specific embodiments, Figure 4 and Figure 5As shown, the bottom edge of the elastic conical wall 212b is connected to the mounting ring 211b, and the cone top of the elastic conical wall 212b is provided with a pressure opening. In the closed state, the elastic conical wall 212b contracts inwardly to close the pressure opening, and in the open state, the elastic conical wall 212b expands outwardly to open the pressure opening. Specifically, when the pressure of the heat exchange medium acts on the inner wall of the elastic conical wall 212b, the pressure of the heat exchange medium is less than the initial elastic force of the elastic conical wall 212b, and the elastic conical wall 212b contracts inwardly to close the pressure opening. The pressure of the heat exchange medium is greater than the initial elastic force of the elastic conical wall 212b, and the elastic conical wall 212b expands outwardly under the pressure of the heat exchange medium to open the pressure opening.

[0057] In some specific embodiments, Figure 4 and Figure 5 As shown, the elastic choke nozzle 210 b is detachably mounted at the inlet of the jet hole 110 , so as to facilitate the maintenance and replacement of the elastic choke nozzle 210 b.

[0058] In some specific embodiments, Figure 4 and Figure 5 As shown, the elastic choke nozzle 210b also includes at least three elastic rods 213b, the side of the elastic rod 213b is attached to the outer wall of the elastic conical wall 212b, the length direction of the elastic rod 213b is located on the same plane as the axial direction of the elastic conical wall 212b, and the elastic rod 213b extends to the pressure opening, wherein at least three elastic rods 213b are arranged in a circular array. Specifically, the elastic rod 213b can provide external support force to the elastic conical wall 212b to prevent the elastic conical wall 212b from being locally deformed due to excessive pressure on the elastic part 212a. That is to say, under the pressure of the heat exchange medium, the pressure of the heat exchange medium on the elastic conical wall 212b may be too large, which may cause the deformation of the elastic conical wall 212b to exceed the limit deformation amount, and may cause irreversible damage to the elastic conical wall 212b. In addition, the length direction of the elastic rod 213b and the axial direction of the elastic conical wall 212b are located on the same plane, that is, the elastic rod 213b is tightly attached to the elastic conical wall 212b from top to bottom, that is, the elastic rod 213b can provide external supporting force to the elastic conical wall 212b from top to bottom. In addition, by arranging at least three elastic rods 213b in a circumferential array on the elastic conical wall 212b, the external supporting force of the elastic conical wall 212b can be balanced. If the external supporting force is uneven, under the combined action of the supporting force of the elastic rod 213b and the pressure of the heat exchange medium on the elastic conical wall 212b, the elastic conical wall 212b will be subjected to uneven force locally, which may further cause damage to the elastic conical wall 212b.

[0059] In some specific embodiments, Figure 4 and Figure 5 As shown, the inner side of the annular spring 220b is tightly buckled on the elastic rod 213b. Specifically, the annular spring 220b can further provide external support force to the elastic conical wall 212b. That is, the pressure of the heat exchange medium acts on the elastic conical wall 212b, and the elastic conical wall 212b can transfer part of the pressure to the elastic rod 213b, and the elastic rod 213b then transfers it to the annular spring 220b.

[0060] In some specific embodiments, the neutron source system is the aforementioned jet mechanism 1000 for a neutron target.

[0061] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A jet mechanism for a neutron target, characterized in that: include: A jet plate, wherein the jet plate is provided with jet holes; A baffle assembly, wherein the baffle assembly is mounted on the jet hole, the baffle assembly includes an elastic baffle, wherein the elastic baffle is mounted on the jet hole, and the elastic baffle has a closed state for closing the jet hole and an open state for opening the jet hole, wherein in the closed state, an initial elastic force of the elastic baffle is greater than a pressure of a heat exchange medium on the elastic baffle, and in the open state, an initial elastic force of the elastic baffle is less than a pressure of the heat exchange medium on the elastic baffle.

2. The jet mechanism for neutron target according to claim 1, characterized in that: There are multiple jet holes and multiple elastic baffles, and the jet holes correspond to the elastic baffles one by one, wherein the elastic coefficient of the elastic baffle close to the edge of the jet plate is greater than the elastic coefficient of the elastic baffle far from the edge of the jet plate.

3. The jet mechanism for a neutron target according to claim 2, characterized in that: The elastic coefficient calculation formula of each elastic flow blocking member is: Wherein, E is the elastic coefficient of the elastic baffle; r is the beam spot radius; A is related to the beam spot radius and the total beam spot power; and B is related to the beam spot radius and the total beam spot power.

4. The jet mechanism for neutron target according to claim 2, characterized in that: The elastic baffle is an elastic baffle plate, which includes a supporting portion and an elastic portion connected to each other, the edge of the supporting portion is connected to the inner wall of the jet hole, and in the closed state, the edge of the elastic portion abuts against the inner wall of the jet hole, the supporting portion and the elastic portion cooperate with each other to jointly close the jet hole, and in the open state, the edge of the elastic portion is away from the inner wall of the jet hole.

5. The jet mechanism for neutron target according to claim 4, characterized in that: The angle between the horizontal plane where the elastic baffle is located and the radial cross section of the jet hole is greater than or equal to 0° and less than 90°.

6. The jet mechanism for neutron target according to claim 4, characterized in that: The flow blocking component also includes: A torsion spring, wherein a first torsion arm of the torsion spring is connected to the support portion, and a second torsion arm of the torsion spring is connected to the elastic portion; A support rod, the side surface of the support rod is attached to the elastic part, the middle part of the support rod is connected to the second torsion arm of the torsion spring, and the length direction of the support rod is orthogonal to the length direction of the second torsion arm of the torsion spring.

7. The jet mechanism for neutron target according to claim 2, characterized in that: The elastic flow-blocking member is an elastic flow-blocking nozzle, and the elastic flow-blocking nozzle comprises: A mounting ring, the mounting ring being mounted at the inlet of the jet hole; An elastic conical wall, the bottom edge of which is connected to the mounting ring, the top of which is provided with a pressure opening, in the closed state, the elastic conical wall contracts inwardly to close the pressure opening, and in the open state, the elastic conical wall expands outwardly to open the pressure opening.

8. The jet mechanism for neutron target according to claim 7, characterized in that: The elastic choke nozzle also includes: At least three elastic rods, the side surfaces of the elastic rods are attached to the outer wall of the elastic conical wall, the length direction of the elastic rods is in the same plane as the axial direction of the elastic conical wall, and the elastic rods extend to the pressure opening, wherein at least three of the elastic rods are arranged in a circular array.

9. The jet mechanism for a neutron target according to claim 8, characterized in that: The flow-blocking assembly further comprises an annular spring, the inner side of which is tightly buckled on the elastic rod.

10. A neutron source system, characterized in that: The invention comprises a jet mechanism for a neutron target according to any one of claims 1 to 9.

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