A target component

Abstract

The present invention discloses a target component, belonging to the technical field of the core of a nuclear reactor, which includes a first end plug, a clamping tube, a second end plug, a connecting tube, a third end plug and a target rod. The first end plug is used to be connected with a pressing system, and the connection between the first end plug and the clamping tube is a movable connection. A limiting member is provided inside the connecting tube. The limiting member can move axially to be connected with the first end plug so that the first end plug is connected to the clamping tube in position, and the limiting member can move axially away from the first end plug so that the first end plug and the clamping tube are detachably connected. In the present invention, the connection between the first end plug and the clamping tube is a detachable connection, and locking and unlocking are achieved through a mechanical clamping structure, which is convenient for installation and disassembly, enables structural components such as the pressing system to be reused, reduces the cost of the radiation target, reduces the generation of radioactive waste, and at the same time, no debris or falling parts will be generated during the underwater disassembly process of the target component, and it will not affect the water in the spent fuel pool.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear reactor cores, and particularly to a target assembly. Background Art

[0002] Irradiation targets are mainly used for the production of radioactive isotopes. The irradiation target is similar in structure to the fixed-related components, and mainly consists of a compression system, target rods, nuts and pins. When being irradiated in the reactor, the irradiation target replaces the position of the fixed-related components, and the target material in the target rod generates radioactive isotopes after being irradiated in the nuclear reactor.

[0003] Currently, the target rod is usually installed on the compression system through nuts. The nut is spot-welded to the target rod through a pin to prevent loosening. When the target rod is disassembled, the pin and the nut need to be damaged, or the target rod is directly cut off using cutting tools. After the target rod is disassembled, structural components such as the compression system cannot be reused, increasing the production of radioactive waste. In addition, during the underwater disassembly process of the target rod, debris and parts may uncontrollably enter the spent fuel pool, polluting the water quality of the pool. The present invention proposes a new solution to the above problems. Summary of the Invention

[0004] In order to overcome at least one of the above disadvantages, the present invention provides a target assembly. The object of the present invention can be achieved by adopting the following technical solutions:

[0005] The present invention provides a target assembly, including a first end plug, a clamping tube, a second end plug, a connecting tube, a third end plug and a target rod connected in sequence along the axial direction. The first end plug is used to connect with the compression system, and the connection between the first end plug and the clamping tube is a movable connection. A limiting member is arranged inside the connecting tube, and the limiting member can move axially to connect with the first end plug so that the first end plug and the clamping tube are connected in position, and the limiting member can move axially away from the first end plug so that the first end plug and the clamping tube are detachably connected.

[0006] In an implementable manner, a part of the first end plug is located inside the clamping tube and is detachably connected to the clamping tube. One end of the clamping tube is fixedly connected to the first end of the second end plug, the second end of the second end plug is fixedly connected to the first end of the connecting tube, the second end of the connecting tube is fixedly connected to the first end of the third end plug, and the second end of the third end plug is fixedly connected to the target rod.

[0007] In an implementable manner, when the clamping tube rotates circumferentially to the unlocking position, the clamping joint is located within the edge area of the sliding groove so that the clamping joint can move along the sliding groove;

[0008] When the engaging tube rotates circumferentially to the locking position, a part of the engaging joint is located outside the edge area of the sliding groove, so that the engaging joint cannot move along the sliding groove.

[0009] In an implementable embodiment, the first end plug includes a first rod body. One end of the first rod body is provided with a connection structure for connecting with the pressing system. The other end of the first rod body is provided with a rod along the axial direction. A part of the engaging joint protrudes from the outer edge contour of the rod.

[0010] The engaging tube includes a pipe fitting. A stepped hole is axially formed in the pipe fitting. The stepped hole includes a sliding groove and a clamping groove arranged coaxially. The inner diameter of the clamping groove is larger than that of the sliding groove. A stepped surface for abutting against the engaging joint is formed at the connection of the sliding groove and the clamping groove.

[0011] In an implementable embodiment, when the engaging joint rotates circumferentially to a preset angle, the engaging joint is located within the edge area of the sliding groove, so that the engaging joint can move along the sliding groove.

[0012] When the engaging joint rotates circumferentially to a non-preset angle, a part of the engaging joint is located outside the edge area of the sliding groove, so that the engaging joint cannot move along the sliding groove.

[0013] In an implementable embodiment, an elastic member is provided between the limiting member and the third end plug. The elastic member applies an elastic force to the limiting member to move in the direction of the first end plug, so that a part of the limiting member can contact the first end plug and form a stop for the circumferential movement of the first end plug.

[0014] In an implementable embodiment, the limiting member includes a sliding block. The sliding block is located in the inner cavity of the connecting tube. One end of the sliding block is provided with an engaging rod. The second end plug is axially provided with a through groove for the engaging rod to pass through. A limiting groove is provided on the engaging joint of the first end plug. A part of the engaging rod can be embedded in the limiting groove to form a stop for the circumferential movement of the first end plug.

[0015] In an implementable embodiment, the elastic member includes a compression spring whose deformation direction is arranged along the axial direction of the connecting tube. The first end of the compression spring abuts against the limiting member, and the second end of the compression spring abuts against the third end plug.

[0016] In one implementable manner, a first slotted opening is provided on the slider, and the connecting pipe includes a sleeve and a second slotted opening provided on the sleeve. Axially, the first slotted opening and the second slotted opening are arranged offset from each other, and the end of the first slotted opening away from the first end plug is located within the edge area of the second slotted opening.

[0017] In one implementable manner, the third end plug includes a third rod body, and a third slotted opening is provided on the third rod body. The first slotted opening, the second slotted opening, and the third slotted opening are arranged along the same axis.

[0018] Advantageous technical effects of the present invention: According to the present disclosure, the target component includes a first end plug, a clamping pipe, a second end plug, a connecting pipe, a third end plug, and a target rod. The first end plug is connected to the pressing system, and the connection between the first end plug and the clamping pipe is detachable. Locking and unlocking are achieved through a mechanical clamping structure, which facilitates installation and disassembly, enables structural components such as the pressing system to be reused, reduces the cost of the radiation target component, and reduces the generation of radioactive waste. At the same time, the underwater disassembly process of the target component does not generate debris or drop parts, and does not affect the water quality of the spent fuel pool. Description of the Drawings

[0019] In the drawings, the following is given by way of example and not limitation:

[0020] Figure 1 A cross-sectional view of the overall structure is shown;

[0021] Figure 2 A schematic structural view of the first end plug is shown;

[0022] Figure 3 A cross-sectional view of the clamping pipe at one angle is shown;

[0023] Figure 4 A cross-sectional view of the clamping pipe at another angle is shown;

[0024] Figure 5 A cross-sectional view of the second end plug at one angle is shown;

[0025] Figure 6 A cross-sectional view of the second end plug at another angle is shown;

[0026] Figure 7 A schematic structural view of the limiting member is shown;

[0027] Figure 8 A schematic structural view of the connecting pipe is shown;

[0028] Figure 9 A schematic structural view of the third end plug is shown.

[0029] In the figure:

[0030] 1. First end plug; 2. Engaging tube; 3. Second end plug; 4. Limiting member; 5. Elastic member; 6. Connecting tube; 7. Third end plug; 8. Target rod;

[0031] 11. First rod body; 12. Connecting structure; 13. Rod member; 14. Engaging joint; 15. Limiting groove; 21. Pipe fitting; 22. Sliding groove; 23. Card slot; 24. Step surface; 31. Second rod body; 32. Through groove; 33. First annular concave platform; 34. Second annular concave platform; 41. Engaging rod; 42. Slide block; 43. First slotted opening; 61. Sleeve; 62. Second slotted opening; 71. Third rod body; 72. Third slotted opening; 73. Second annular concave platform; 74. Fourth annular concave platform. Specific embodiments

[0032] In the following detailed disclosure, reference is made to the accompanying drawings, and these embodiments are fully described. To make the technical solutions of the present invention clearer and more definite for those skilled in the art, the described embodiments are not limited thereto. The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0033] In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plural" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation of the present invention.

[0035] Such as Figures 1-9As shown in the figure, the present invention provides a target component, which includes a first end plug 1, a clamping tube 2, a second end plug 3, a connecting tube 6, a third end plug 7 and a target rod 8 connected in sequence along the axial direction. The first end plug 1 is used to connect with a pressing system. The connection between the first end plug 1 and the clamping tube 2 is a movable connection. A limiting member 4 is arranged inside the connecting tube 6. The limiting member 4 can move axially to connect with the first end plug 1 so that the first end plug 1 is connected to the clamping tube 2 in position. The limiting member 4 can move axially away from the first end plug 1 so that the first end plug 1 is detachably connected to the clamping tube 2.

[0036] This target component includes a first end plug 1, a clamping tube 2, a second end plug 3, a connecting tube 6, a third end plug 7 and a target rod 8. It is connected to the pressing system through the first end plug 1. The connection between the first end plug 1 and the clamping tube 2 is a detachable connection. Locking and unlocking are achieved through a mechanical clamping structure, which is convenient for installation and disassembly, enabling structural components such as the pressing system to be reused. This not only reduces the cost of the radiation target component but also reduces the generation of radioactive waste. At the same time, no debris or falling parts will be generated during the underwater disassembly process of the target component, and the water quality of the spent fuel pool will not be affected.

[0037] Among them, the installation and disassembly node is located between the first end plug 1 and the clamping tube 2. The locking and unlocking functions are achieved by adjusting the position of the limiting member 4. When the limiting member 4 moves in the locking direction, it abuts against the first end plug 1 and forms a limit on the first end plug 1, achieving the effect that the position of the first end plug 1 is relatively fixed relative to the clamping tube 2, and realizing the locked state of the clamping tube 2 and the first end plug 1. When the limiting member 4 moves in the unlocking direction, it moves away from the first end plug 1, and the first end plug 1 can move, achieving the effect that the position of the first end plug 1 is relatively movable relative to the clamping tube 2, and realizing the unlocked state of the clamping tube 2 and the first end plug 1.

[0038] In an implementable embodiment, as Figure 1 shown, a part of the first end plug 1 is located inside the clamping tube 2 and is detachably connected to the clamping tube 2. One end of the clamping tube 2 is fixedly connected to the first end of the second end plug 3. The second end of the second end plug 3 is fixedly connected to the first end of the connecting tube 6. The second end of the connecting tube 6 is fixedly connected to the first end of the third end plug 7. The second end of the third end plug 7 is fixedly connected to the target rod 8.

[0039] Among them, as Figure 5 shown, the first end of the second end plug 3 has a first annular concave platform 33. The clamping tube 2 is sleeved on the first annular concave platform 33. The second end of the second end plug 3 has a second annular concave platform 73. The connecting tube 6 is sleeved on the second annular concave platform 73. And the connection between the second end plug 3 and the clamping tube 2 can be welding, and the connection between the second end plug 3 and the connecting tube 6 can be welding.

[0040] Among them, as Figure 9As shown in the figure, the first end of the third end plug 7 has a third annular concave platform, the connecting pipe 6 is sleeved on the third annular concave platform, the second end of the third end plug 7 has a fourth annular concave platform 74, the target rod 8 is sleeved on the fourth annular concave platform 74, and the third end plug 7 and the connecting pipe 6 can be welded, and the third end plug 7 and the target rod 8 can be welded.

[0041] Among them, the outer diameter sizes of the engaging pipe 2, the second end plug 3, the connecting pipe 6, the third end plug 7 and the target rod 8 can be approximately the same for installation and use.

[0042] Among them, the target rod 8 includes structures such as a cladding, a target element box, a spacer block, and a lower end plug.

[0043] In an implementable embodiment, as Figures 1-4 shown, the working position of the engaging pipe 2 has a locking position and an unlocking position. When the engaging pipe 2 is in the locking position, the first end plug 1 forms a stop in the axial movement direction of the engaging pipe 2. When the engaging pipe 2 is in the unlocking position, the engaging pipe 2 can move axially until it is separated from the first end plug 1.

[0044] It can be understood that when the first end plug 1 and the engaging pipe 2 are in a connected state, the engaging pipe 2 can rotate around its own axis. During the rotation of the engaging pipe 2, there are a locking position and an unlocking position. When the engaging pipe 2 rotates to the locking position, the first end plug 1 forms a stop for the engaging pipe 2 moving axially, and the engaging pipe 2 also forms a stop for the first end plug 1 moving axially, keeping the positions of the engaging pipe 2 and the first end plug 1 relatively stable; when the engaging pipe 2 rotates to the unlocking position aligned with the first end plug 1, the first end plug 1 does not form a stop for the engaging pipe 2 moving axially, and the engaging pipe 2 can move axially away from the first end plug 1 and be separated from the first end plug 1.

[0045] In an implementable embodiment, as Figures 2-4 shown, the first end plug 1 includes a first rod body 11. One end of the first rod body 11 is provided with a connection structure 12 for connecting with the pressing system. The other end of the first rod body 11 is provided with a rod 13 axially. The end of the rod 13 away from the first rod body 11 is provided with an engaging joint 14, and a part of the engaging joint 14 protrudes from the outer edge contour of the rod 13; the engaging pipe 2 includes a pipe fitting 21. A stepped hole is axially opened in the pipe fitting 21. The stepped hole includes a coaxial sliding groove 22 and a clamping groove 23. The inner diameter of the clamping groove 23 is larger than the inner diameter of the sliding groove 22. A stepped surface 24 for abutting against the engaging joint 14 is formed at the connection of the sliding groove 22 and the clamping groove 23.

[0046] Among them, the outer diameter of the first rod body 11 is larger than the outer diameter of the rod 13, and the outer diameter of the rod 13 is smaller than the inner diameter of the sliding groove 22.

[0047] Among them, the snap-fit joint 14 includes a long side and a short plate, and the cross-sectional shape of the slide groove 22 is also adapted to the snap-fit joint 14. When the snap-fit joint 14 is located inside the slide groove 22, the two are matched with a small gap. The width of the long side of the snap-fit joint 14 is greater than the width of the short side of the slide groove 22, and the width of the long side of the snap-fit joint 14 is less than the inner diameter of the slot 23.

[0048] Among them, when the locking joint 14 is located in the locking groove 23, the locking tube 2 can rotate along the circumferential direction to realize the position switching between the locked position and the unlocked position, and the locking joint 14 is pushed to abut against the step surface 24 through the limit member 4, thereby limiting the rotation of the locking tube 2, keeping the positions of the locking tube 2 and the first end plug 1 relatively fixed, and improving stability.

[0049] The first rod body 11 is a cylindrical structure, the rod member 13 is a small-diameter cylindrical section, and the snap-fit joint 14 is a groove-shaped section.

[0050] In one possible implementation, Figures 2-4 As shown, when the locking tube 2 rotates along its own circumference to the unlocking position, the locking joint 14 is located in the edge area of the slide groove 22, so that the locking joint 14 can move along the slide groove 22; when the locking tube 2 rotates along its own circumference to the locking position, a part of the locking joint 14 is located outside the edge area of the slide groove 22, so that the locking joint 14 cannot move along the slide groove 22.

[0051] When the locking tube 2 is rotated to the unlocking position aligned with the locking joint 14, the long side of the locking joint 14 is aligned with the long side of the slide groove 22, and the short side of the locking joint 14 is aligned with the short side of the slide groove 22. The locking joint 14 is completely located in the edge area of the slide groove 22, so that the locking joint 14 can pass through the slide groove 22, thereby realizing the separation of the locking tube 2 from the first end plug 1 and disassembly.

[0052] When the locking tube 2 is rotated to a non-unlocking position offset from the locking joint 14, that is, when the locking tube 2 is rotated to a locking position, the long side of the locking joint 14 is offset from the long side of the slide groove 22, and the short side of the locking joint 14 is offset from the short side of the slide groove 22. A portion of the locking joint 14 is located outside the edge area of the slide groove 22, so that the locking joint 14 cannot pass through the slide groove 22, thereby achieving locking of the position of the locking tube 2 and the first end plug 1.

[0053] In one possible implementation, Figure 1 As shown, an elastic member 5 is provided between the limit member 4 and the third end plug 7, and the elastic member 5 applies an elastic force to the limit member 4 to move in the direction of the first end plug 1, so that a part of the limit member 4 can contact the first end plug 1 and form a stop for the circumferential movement of the first end plug 1.

[0054] Among them, an elastic member 5 and a limiting member 4 are arranged inside the connecting pipe 6. One end of the elastic member 5 is relatively fixed to the third end plug 7, and the other end of the elastic member 5 is in contact with the limiting member 4. The elastic member 5 applies an elastic force to the limiting member 4 to make it move in the direction close to the first end plug 1, and the elastic member 5 pushes the limiting member 4 to be embedded into the first end plug 1 to form a limit.

[0055] Among them, as Figures 5-7 shown, the limiting member 4 includes a slider 42. The slider 42 is located in the inner cavity of the connecting pipe 6. A clamping rod 41 is arranged at one end of the slider 42. The second end plug 3 is axially provided with a through groove 32 for the clamping rod 41 to pass through. A limiting groove 15 is arranged on the clamping joint 14 of the first end plug 1. A part of the clamping rod 41 can be embedded into the limiting groove 15 to form a stop for the circumferential movement of the first end plug 1.

[0056] Among them, the cross-sectional shape of the through groove 32 is adapted to the cross-sectional shape of the clamping rod 41. The second end plug 3 forms a stop for the circumferential movement of the clamping rod 41. The clamping rod 41 can pass through the through groove 32 and move axially. Under the extrusion of the elastic member 5, the end of the clamping rod 41 is embedded into the limiting groove 15 of the clamping joint 14 to form a limit, so that no circumferential displacement can occur between the first end plug 1 and the clamping rod 41, that is, the clamping pipe 2 cannot rotate circumferentially and always remains in the locked position.

[0057] Among them, as Figure 1 shown, the elastic member 5 includes a compression spring whose deformation direction is arranged along the axial direction of the connecting pipe 6. The first end of the compression spring abuts against the limiting member 4, and the second end of the compression spring abuts against the third end plug 7.

[0058] Among them, the elastic member 5 includes a torsion spring. The first end of the torsion spring abuts against the limiting member 4, and the second end of the torsion spring abuts against the third end plug 7.

[0059] Among them, the elastic member 5 includes an elastic sheet. The first end of the elastic sheet abuts against the limiting member 4, and the second end of the elastic sheet abuts against the third end plug 7.

[0060] In an implementable manner, as Figure 1 、 Figure 7 and Figure 8 shown, a first slot 43 is arranged on the slider 42. The connecting pipe 6 includes a sleeve 61 and a second slot 62 opened on the sleeve 61. The first slot 43 and the second slot 62 are arranged axially offset from each other, and the end of the first slot 43 far from the first end plug 1 is located within the edge area of the second slot 62.

[0061] Wherein, when the limiting member 4 is inserted into the first end plug 1, the first slotted groove 43 and the second slotted groove 62 are relatively staggered, and the end of the first slotted groove 43 away from the first end plug 1 is located within the edge area of the second slotted groove 62, facilitating the adjustment of the position of the first slotted groove 43 through a loading and unloading operation tool to drive the limiting member 4 to move away from the first end plug 1 until it is separated from the first end plug 1.

[0062] Wherein, the first slotted groove 43 and the second slotted groove 62 have a partially overlapping part, facilitating the accommodation of the same loading and unloading operation tool.

[0063] Further, as Figure 1 and Figure 9 shown, the third end plug 7 includes a third rod body 71, and a third slotted groove 72 is provided on the third rod body 71. The first slotted groove 43, the second slotted groove 62, and the third slotted groove 72 are arranged along the same axis.

[0064] Wherein, the third slotted groove 72 is used to accommodate the loading and unloading operation tool.

[0065] Before the connecting pipe 6 and the third end plug 7 are assembled and welded, the limiting member 4 and the elastic member 5 need to be assembled. The specific assembly process is as follows: First, the limiting member 4 is inserted, and the engaging rod 41 is inserted into the through groove 32 of the second end plug 3; then the elastic member 5 is inserted, and the upper end surface of the elastic member 5 contacts the end surface of the slider 42; finally, the third end plug 7 is pressed into the connecting pipe 6, and the lower end surface of the elastic member 5 contacts the third end plug 7, and the elastic member 5 is in a compressed and stressed state. During assembly and welding, the second slotted groove 62 on the side of the connecting pipe 6 and the first slotted groove 43 on the side of the slider 42 should be kept aligned. The lower end of the third end plug 7 is welded to the cladding tube of the target rod 8. During assembly and welding, the third slotted groove 72 on the side of the third end plug 7 and the second slotted groove 62 on the side of the connecting pipe 6 should be kept aligned. The third slotted groove 72 is used to accommodate the loading and unloading operation tool. When the first end plug 1 is connected to the connecting pipe 6, the rod member 13 and the engaging joint 14 of the first end plug 1 are inserted into the stepped hole of the connecting pipe 6 until the engaging joint 14 completely enters the card slot 23; then the connecting pipe 6 is rotated horizontally to the locking position so that the engaging joint 14 is limited and clamped by the stepped surface 24.

[0066] This embodiment provides an installation step of the target component. The installation step specifically includes:

[0067] S1. Use the first part and the second part of the loading and unloading operation tool to insert into the first slotted groove 43 of the limiting member 4 and the third slotted groove 72 of the third end plug 7 respectively. The second part of the loading and unloading operation tool remains stationary, and the first part of the loading and unloading operation tool presses down forcefully to compress the elastic member 5, and the limiting member 4 moves away from the first end plug 1.

[0068] S2. Move the first component, the second component of the mobile loading and unloading operation tool, and the target rod, align the through slot 32 of the connecting pipe 6 with the engaging joint 14 of the first end plug 1, and rotate it horizontally to the locking position after moving it to the top;

[0069] S3. The first component of the loading and unloading operation tool unloads force and moves upward, the limiting member 4 moves upward, and the engaging rod 41 is inserted into the limiting slot 15 of the first end plug 1 to limit the circumferential rotation of the engaging pipe 2.

[0070] This embodiment provides an installation step of the target component. The installation step specifically includes:

[0071] S1. Use the first component and the second component of the loading and unloading operation tool to respectively insert into the first slot 43 of the limiting member 4 and the third slot 72 of the third end plug 7. Keep the second component of the loading and unloading operation tool stationary, and the first component of the loading and unloading operation tool presses downward on the elastic member 5 with force, and the limiting member 4 moves away from the first end plug 1;

[0072] S2. Move the first component, the second component of the loading and unloading operation tool, and the engaging pipe 2, rotate it horizontally to the unlocking position, and move it downward to disassemble the engaging pipe 2 from the first end plug 1.

[0073] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection 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 specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0074] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0075] In view of the above detailed description, these and other changes can be made to these embodiments. This written description includes the best mode of the embodiment to disclose the present invention. The patent scope obtained by the present invention is defined by the claims. The claims are not limited by the present disclosure content. The protection scope of the present invention is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent replacements or changes, and all are within the protection scope of the present invention.

Claims

1. A target component, characterized in that It includes a first end plug (1), a clamping tube (2), a second end plug (3), a connecting tube (6), a third end plug (7) and a target rod (8) which are connected in sequence along the axial direction. The first end plug (1) is used to connect with a pressing system. The connection between the first end plug (1) and the clamping tube (2) is a movable connection. A limiting member (4) is arranged inside the connecting tube (6). The limiting member (4) can move axially to connect with the first end plug (1) so that the first end plug (1) is connected to the clamping tube (2) in position. The limiting member (4) can move axially away from the first end plug (1) so that the first end plug (1) is detachably connected to the clamping tube (2). The working position of the clamping tube (2) has a locking position and an unlocking position. When the clamping tube (2) is in the locking position, the first end plug (1) forms a stop in the axial moving direction of the clamping tube (2). When the clamping tube (2) is in the unlocking position, the clamping tube (2) can move axially until it is separated from the first end plug (1). The first end plug (1) includes a first rod body (11). One end of the first rod body (11) is provided with a connection structure (12) for connecting with the pressing system. The other end of the first rod body (11) is provided with a rod member (13) along the axial direction. The end of the rod member (13) away from the first rod body (11) is provided with a clamping joint (14). A part of the clamping joint (14) protrudes from the outer edge contour of the rod member (13). The clamping tube (2) includes a pipe fitting (21). A stepped hole is axially formed inside the pipe fitting (21). The stepped hole includes a coaxial sliding groove (22) and a clamping groove (23). The inner diameter of the clamping groove (23) is larger than the inner diameter of the sliding groove (22). A stepped surface (24) for abutting against the clamping joint (14) is formed at the connection between the sliding groove (22) and the clamping groove (23).

2. The target component according to claim 1, characterized in that, A part of the first end plug (1) is located inside the clamping tube (2) and is detachably connected to the clamping tube (2). One end of the clamping tube (2) is fixedly connected to the first end of the second end plug (3). The second end of the second end plug (3) is fixedly connected to the first end of the connecting tube (6). The second end of the connecting tube (6) is fixedly connected to the first end of the third end plug (7). The second end of the third end plug (7) is fixedly connected to the target rod (8).

3. The target component according to claim 1, characterized in that When the clamping tube (2) rotates circumferentially to the unlocking position, the clamping joint (14) is located within the edge area of the sliding groove (22) so that the clamping joint (14) can move along the sliding groove (22). When the clamping tube (2) rotates circumferentially to the locking position, a part of the clamping joint (14) is located outside the edge area of the sliding groove (22) so that the clamping joint (14) cannot move along the sliding groove (22).

4. The target component according to any one of claims 1-3, characterized in that, An elastic member (5) is provided between the limiting member (4) and the third end plug (7), and the elastic member (5) applies an elastic force to the limiting member (4) to move in the direction of the first end plug (1), so that a part of the limiting member (4) can contact the first end plug (1) and form a stop for the circumferential movement of the first end plug (1).

5. The target component according to claim 4, characterized in that The limiting member (4) comprises a slider (42), the slider (42) being located in the inner cavity of the connecting tube (6), a locking rod (41) being provided at one end of the slider (42), a through groove (32) being provided in the axial direction for the locking rod (41) to pass through, a limiting groove (15) being provided on the locking joint (14) of the first end plug (1), a part of the locking rod (41) being able to be embedded in the limiting groove (15) to form a stop for the first end plug (1) to move in the circumferential direction.

6. The target component according to claim 5, characterized in that, The elastic member (5) comprises a compression spring arranged axially along the connecting tube (6) in a deformation direction, the first end of the compression spring abuts against the limiting member (4), and the second end of the compression spring abuts against the third end plug (7).

7. The target component according to claim 5, characterized in that, The slider (42) is provided with a first slot (43), and the connecting pipe (6) comprises a sleeve (61) and a second slot (62) provided on the sleeve (61). The first slot (43) and the second slot (62) are staggered relative to each other in the axial direction, and the end of the first slot (43) away from the first end plug (1) is located within the edge area of the second slot (62).

8. The target component according to claim 7, characterized in that, The third end plug (7) comprises a third rod body (71), a third slot (72) is provided on the third rod body (71), and the first slot (43), the second slot (62) and the third slot (72) are arranged along the same axis.

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