Bellows and synchrotron accelerator having the same

Abstract

The application discloses a bellows and a synchrotron accelerator with the same, which comprises a bellows outer tube extending along a first direction; a shielding tube arranged on the radially inner side of the bellows outer tube and comprising two beam tubes extending along the first direction and arranged at intervals in the first direction, and the opposite ends of the two beam tubes are fixed with the bellows outer tube respectively; and a sliding unit comprising a sliding piece extending along the first direction, the sliding piece being a conductive piece, and the two ends of the sliding piece are configured to be always slidably attached to the beam tube on the same side along the first direction. According to the bellows, the high-order mode leakage and the electron beam instability can be effectively inhibited, the heating phenomenon caused by the excessive wall resistance of the bellows outer tube is avoided, the bellows has reliable deformation compensation function, and the reliability and applicability of the bellows are improved significantly.

Description

Technical Field

[0001] This invention relates to the field of synchrotron radiation optical shielding technology, and in particular to a corrugated tube and a synchrotron radiation accelerator having the same. Background Technology

[0002] The vacuum chamber in a synchrotron radiation accelerator is typically composed of multiple modular units, which are interconnected by bellows to form a loop. Because the wall resistance of the bellows is much greater than that of the vacuum chamber tube wall, the wall current on the bellows will generate a high thermal load, which can damage the bellows in severe cases. Furthermore, the bellows are subject to deformation. Therefore, conventional bellows are no longer suitable for connecting high-current beam vacuum chambers.

[0003] In existing technologies, a high-frequency shielding mechanism is typically installed inside a conventional corrugated tube to shield the electron beam. However, the wall resistance of the corrugated outer tube is usually relatively high, which can easily lead to excessive heat generation and reduced reliability. At the same time, conventional shielded corrugated tubes have limited axial adjustment range in the beam channel and limited radial and angular compensation capabilities, which greatly limits their applicable scenarios. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a bellows that can effectively suppress high-order mode leakage and electron beam instability, and can avoid the heating phenomenon caused by excessive resistance of the outer wall of the bellows. At the same time, the bellows has a reliable deformation compensation function, thereby significantly improving the reliability and applicability of the bellows.

[0005] The present invention also proposes a synchrotron radiation accelerator having the above-mentioned bellows.

[0006] According to a first aspect of the present invention, a corrugated tube comprises: a corrugated outer tube extending along a first direction; a shielding tube disposed radially inside the corrugated outer tube and comprising: two beam channels extending along the first direction and spaced apart in the first direction, with opposite ends of the two beam channels respectively fixed to the corrugated outer tube, the two beam channels being relatively movable; a sliding unit comprising a sliding member extending along the first direction, the sliding member being a conductive member, both ends of the sliding member being respectively configured to always slidably engage with the beam channel on the same side along the first direction; and a limiting structure connected between the two beam channels, the limiting structure being configured to limit the relative displacement of the two beam channels in the axial, radial, and / or circumferential directions.

[0007] According to the bellows of the present invention, by providing a bellows outer tube, a shielding tube, and a limiting structure in the bellows, the bellows outer tube extends along a first direction, the shielding tube is arranged radially inside the bellows outer tube and includes: two beam channels and a sliding unit, the two beam channels extend along the first direction and are spaced apart in the first direction, and the opposite ends of the two beam channels are respectively fixed to the bellows outer tube, the two beam channels are relatively movable, the sliding unit includes a sliding member extending along the first direction, the sliding member is a conductive member, the two ends of the sliding member are respectively configured to always slidably fit against the beam channel on the same side along the first direction, and the limiting structure is connected between the two beam channels, the limiting structure is configured to limit the relative displacement of the two beam channels in the axial, radial and / or circumferential directions, thereby effectively suppressing high-order mode leakage and electron beam instability, and avoiding the heating phenomenon caused by excessive wall resistance of the bellows outer tube, while enabling the bellows to have a reliable deformation compensation function, thereby significantly improving the reliability and applicability of the bellows.

[0008] In some embodiments, the two beam channels are a first beam tube and a second beam tube, and the corrugated tube further includes: a first fixing ring and a second fixing ring. The first fixing ring is sleeved and fixed on the outside of the first beam tube and extends outward along the radial direction of the first beam tube. The second fixing ring is sleeved and fixed on the outside of the second beam tube and extends outward along the radial direction of the second beam tube. The limiting structure includes: a limiting rod. The limiting rod extends along the first direction. One end of the limiting rod is fixedly connected to the first fixing ring, and the other end of the limiting rod is movably connected to the second fixing ring.

[0009] In some embodiments, the first fixing ring is provided with a fixing hole, the second fixing ring is provided with a limiting hole, one end of the limiting rod passes through and is fixed in the fixing hole, and the other end of the limiting rod is movably passed through the limiting hole.

[0010] In some embodiments, the other end of the limiting rod is clearance-fitted with the limiting hole, and the limiting structure further includes: a first limiting member and a second limiting member, the first limiting member and the second limiting member are both sleeved and fixed on the other end of the limiting rod, and are respectively located on both sides of the second fixing ring, and the distance between the first limiting member and the second limiting member is greater than the depth of the limiting hole.

[0011] In some embodiments, the relative positions of the first limiting member and the second limiting member on the limiting rod are adjustable along the first direction.

[0012] In some embodiments, the other end of the limiting rod is formed with an external thread, and the first limiting member and the second limiting member are both limiting nuts, which are threaded onto the limiting rod.

[0013] In some embodiments, there are multiple limiting rods, which are arranged at circumferential intervals along the beam channel.

[0014] In some embodiments, the first fixing ring has a first fixing portion extending along the first direction, the first fixing portion being annular and sleeved on the outside of the first beam tube, and the first fixing portion being connected to the first beam tube by a first fastener; the second fixing ring has a second fixing portion extending along the first direction, the second fixing portion being annular and sleeved on the outside of the second beam tube, and the second fixing portion being connected to the second beam tube by a second fastener.

[0015] In some embodiments, a plurality of first fastening holes are formed on the first fixing portion at intervals along the circumference of the first fixing portion, and a first fixing groove extending in an annular shape along the circumference of the beam pipe is formed on the outer peripheral wall of the first beam tube, and the first fastener extends through the first fastening holes and is fixed in the first fixing groove; a plurality of second fastening holes are formed on the second fixing portion at intervals along the circumference of the second fixing portion, and a second fixing groove extending in an annular shape along the circumference of the beam pipe is formed on the outer peripheral wall of the second beam tube, and the second fastener extends through the second fastening holes and is fixed in the second fixing groove.

[0016] In some embodiments, grooves are formed on the outer peripheral walls of both beam pipes, the two grooves are facing each other in the first direction, and the two ends of the slider are respectively disposed in the two grooves and slide against the bottom wall of the groove.

[0017] In some embodiments, the number of sliding units is multiple, and the multiple sliding units are arranged at circumferential intervals along the beam channel.

[0018] In some embodiments, the corrugated outer tube includes: a tube body, the axis of which extends along the first direction; two connecting pipes, each connected to one end of the tube body; and two flanges, each connected to one end of the two connecting pipes opposite to the tube body.

[0019] In some embodiments, the inner peripheral wall of the corrugated outer tube is provided with a plurality of mounting protrusions arranged at intervals along the circumference of the corrugated outer tube, and the shielding tube further includes two connecting end plates. The two connecting end plates are annular and are respectively sleeved and fixed to the opposite ends of the two beam pipes in the first direction. The connecting end plates are fixed to the mounting protrusions by fasteners.

[0020] A synchrotron radiation accelerator according to a second aspect of the present invention includes: a plurality of vacuum chambers; and a bellows according to a first aspect of the present invention, the bellows being connected between two adjacent vacuum chambers.

[0021] According to the second aspect of the present invention, by providing the bellows described in the first aspect, high-order mode leakage and electron beam instability can be effectively suppressed, and the heating phenomenon caused by excessive resistance of the outer wall of the bellows can be avoided. At the same time, the bellows has a reliable deformation compensation function, thereby significantly improving the reliability and applicability of the synchrotron radiation accelerator.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a bellows according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a corrugated outer tube according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the shielding tube at one angle according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the shielding tube from another angle according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the shielding tube from another angle according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of a beam channel at one angle according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the beam channel from another angle according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of a sliding unit according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of a slider according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the support frame according to an embodiment of the present invention;

[0033] Figure 11 This is a cross-sectional view of the shielding tube according to an embodiment of the present invention;

[0034] Figure 12This is a schematic diagram of the limiting structure according to an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the pipe connection according to an embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of a connection end plate according to an embodiment of the present invention.

[0037] Figure label:

[0038] 100. Corrugated pipe;

[0039] 10. Corrugated outer tube;

[0040] 11. Pipe body;

[0041] 12. Connect the pipe; 121. Install the protrusion;

[0042] 13. Flange;

[0043] 14. Adapter ring;

[0044] 20. Shielding tube;

[0045] 21. Beam tube; 211. First beam tube; 2111. First fixing slot; 212. Second beam tube; 2121. Second fixing slot;

[0046] 213. Groove;

[0047] 214. Mounting platform;

[0048] 22. Sliding unit;

[0049] 221. Sliding component; 2211. Slide plate; 22111. Clearance hole; 2212. Flat plate; 22121. First plate segment; 2213. Curved plate;

[0050] 222. Attachment;

[0051] 223. Support frame; 2231. Connecting plate segment; 2232. Curved plate segment; 2233. Folded edge; 22331. Adjustment hole; 2234. Baffle;

[0052] 224. Connecting block;

[0053] 225. Adjusting pin;

[0054] 23. Connecting end plate;

[0055] 30. Flexible connection structure;

[0056] 31. Synchronization loop;

[0057] 32. First elastic element;

[0058] 33. Second elastic element;

[0059] 40. First fixing ring; 41. First fixing part;

[0060] 50. Second fixing ring; 51. Second fixing part;

[0061] 60. Limiting structure;

[0062] 61. Limit rod;

[0063] 62. First limit nut;

[0064] 63. Second limit nut. Detailed Implementation

[0065] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0066] The following is for reference. Figures 1-14 A bellows 100 according to an embodiment of the first aspect of the present invention is described.

[0067] like Figures 1-8 As shown, the corrugated pipe 100 according to a first aspect embodiment of the present invention includes: a corrugated outer pipe 10, a shielding pipe 20, and a limiting structure 60.

[0068] The corrugated outer tube 10 extends along a first direction; the shielding tube 20 is arranged radially inside the corrugated outer tube 10 and includes two beam pipes 21 and a sliding unit 22. The two beam pipes 21 extend along the first direction and are spaced apart in the first direction. The opposite ends of the two beam pipes 21 are fixed to the corrugated outer tube 10, and the two beam pipes 21 are movable relative to each other. The sliding unit 22 includes a sliding member 221 extending along the first direction. The sliding member 221 is a conductive member. The two ends of the sliding member 221 are respectively configured to always slide and fit against the beam pipe 21 on the same side along the first direction. The limiting structure 60 is connected between the two beam pipes and is configured to limit the relative displacement of the two beam pipes 21 in the axial, radial and / or circumferential directions.

[0069] In some specific examples, such as Figure 1 and Figure 2 As shown, the first direction is the front-to-back direction, and the corrugated outer tube 10 extends along the front-to-back direction and is sleeved on the outside of the shielding tube 20. For example Figures 3-7As shown, two beam pipes 21 extend in the front-back direction and are spaced apart in the first direction. Furthermore, the opposite ends of the two beam pipes 21 are fixed to the corrugated outer tube 10, and the two beam pipes 21 can move relative to each other, thereby effectively meeting the deformation requirements of the corrugated tube 100.

[0070] In some specific examples, such as Figure 8 As shown, the sliding member 221 extends in the front-to-back direction. The front end of the sliding member 221 can slide and fit against the front beam pipe 21, and the rear end of the sliding member 221 can slide and fit against the rear beam pipe 21. The sliding member 221 is a conductive member, thereby enabling a wall current path to be formed between the corrugated outer tube 10 and the shielding tube 20. Furthermore, a limiting structure 60 is provided between the two beam pipes 21. The limiting structure 60 can limit the relative displacement of the two beam pipes 21 in the axial, radial, and circumferential directions, thereby enabling the corrugated pipe 100 to have a reliable deformation compensation function, thus meeting the deformation requirements of the corrugated pipe 100.

[0071] In this embodiment, since the two ends of the sliding member 221 are slidably attached to the beam channel 21 on the same side along the first direction, and the sliding member 221 is a conductive member, a continuous mirror wall current path can be formed between the corrugated outer tube 10 and the shielding tube 20 when the electron beam passes through the corrugated tube 100, maintaining good electrical contact. These mirror currents flow along the conductive wall, forming an electromagnetic shielding effect, thereby effectively suppressing high-order mode leakage and electron beam instability. Furthermore, since the sliding member 221 is a conductive member, and its two ends are always slidably attached to the beam channel 21 on the same side along the first direction, the phenomenon of overheating and damage caused by excessive wall resistance of the corrugated outer tube 10 can be avoided. Further, as... Figures 3-5 As shown, the limiting structure 60 restricts the relative displacement of the two beam pipes 21 in the axial, radial and circumferential directions. Therefore, it can not only meet the deformation requirements of the bellows 100, but also prevent the bellows 100 from deforming too much.

[0072] According to an embodiment of the present invention, a corrugated pipe 100 is provided with a corrugated outer pipe 10 and a shielding pipe 20. The corrugated outer pipe 10 extends along a first direction, and the shielding pipe 20 is arranged radially inside the corrugated outer pipe 10 and includes two beam channels 21 and a sliding unit 22. The two beam channels 21 extend along the first direction and are spaced apart in the first direction. The opposite ends of the two beam channels 21 are respectively fixed to the corrugated outer pipe 10, and the two beam channels 21 are movable relative to each other. The sliding unit 22 includes a sliding member 221 extending along the first direction. The sliding member 221 is... The conductive component and the two ends of the sliding component 221 are respectively configured to be slidably attached to the beam pipe 21 on the same side along the first direction. The limiting structure 60 is connected between the two beam pipes 21. The limiting structure 60 is configured to limit the relative displacement of the two beam pipes 21 in the axial, radial and / or circumferential directions. This can effectively suppress high-order mode leakage and electron beam instability, and avoid the heating phenomenon caused by excessive wall resistance of the corrugated outer tube 10. At the same time, it enables the corrugated tube 100 to have a reliable deformation compensation function, thereby significantly improving the reliability and applicability of the corrugated tube 100.

[0073] In one embodiment of the present invention, the two ends of the slider 221 are respectively attached to the surface of the beam channel 21 on the same side.

[0074] In this embodiment, by setting both ends of the slider 221 to be in contact with the beam channel 21 on the same side, the contact area between the slider 221 and the beam channel 21 can be effectively increased, thereby effectively reducing the resistance and effectively improving the conductivity of the slider 221.

[0075] In one embodiment of the present invention, such as Figure 7 As shown, the sliding unit 22 also includes an abutment 222, which is fixed to the beam pipe 21. The abutment 222 is configured to push the sliding member 221 against the bottom wall of the groove 213 in the radial direction of the beam pipe 21.

[0076] In some specific examples, such as Figure 7 As shown, in the radial direction of the beam pipe 21, a portion of the sliding member 221 is disposed between the abutment member 222 and the bottom wall of the groove 213, and the abutment member 222 is fixed on the beam pipe 21. Thus, the abutment member 222 can always push the sliding member 221 to abut against the bottom wall of the groove 213. In other words, the sliding member 221 can not only slide and fit against the bottom wall of the groove 213, but also make good contact with the beam pipe 21.

[0077] In this embodiment, by providing an abutment 222 in the sliding unit 22, the abutment 222 is fixed on the beam pipe 21. The abutment 222 is configured to always push the sliding member 221 against the bottom wall of the groove 213 in the radial direction of the beam pipe 21, which can improve the reliability of the connection between the sliding member 221 and the beam pipe 21.

[0078] In one embodiment of the present invention, such as Figure 7 and Figure 8 As shown, each of the two beam pipes 21 has a mounting platform 214 on the bottom wall of the groove 213. The sliding member 221 has a clearance hole 22111. The clearance hole 22111 extends into a long strip along the first direction. The mounting platform 214 is located inside the clearance hole 22111. The abutment member 222 is an elastic member and corresponds to the mounting platform 214 one by one. The abutment member 222 is fixed on the corresponding mounting platform 214 and abuts against the clearance hole 22111 on the side edge of the beam pipe 21 away from the beam pipe 21 in the radial direction.

[0079] In some specific examples, such as Figure 7 As shown, each of the two beam channels 21 has a mounting platform 214 protruding from the inside out along the radial direction of the beam channel 21 on the bottom wall of the groove 213. For example Figure 8 As shown, the sliding member 221 is provided with two clearance holes 22111 arranged at intervals along the front-rear direction, and two mounting platforms 214 are respectively provided inside the two clearance holes 22111. Further, the abutment member 222 is an elastic member and corresponds one-to-one with the mounting platform 214. The abutment member 222 is fixedly connected to the mounting platform 214 and abuts against the edge of the clearance hole 22111 on the side away from the beam pipe 21 in the radial direction of the beam pipe 21.

[0080] In this embodiment, mounting platforms 214 are provided on the bottom walls of the grooves 213 of the two beam pipes 21. The sliding member 221 is provided with a clearance hole 22111, which extends into an elongated shape along the first direction. The mounting platform 214 is located inside the clearance hole 22111. The abutment member 222 is an elastic member and corresponds one-to-one with the mounting platform 214. The abutment member 222 is fixed on the corresponding mounting platform 214 and abuts against the side edge of the clearance hole 22111 that is radially away from the beam pipe 21. This can make full use of the space of the groove 213, thereby effectively improving the space utilization rate and enhancing the compactness of the beam pipe 21.

[0081] In one embodiment of the present invention, such as Figure 9As shown, the slider 221 extends in an elongated ring shape along the first direction and includes a sliding plate portion 2211, a flat plate portion 2212 and two arc plate portions 2213. The sliding plate portion 2211 and the flat plate portion 2212 extend along the first direction and are arranged at intervals in the radial direction of the beam pipe 21. The two ends of the sliding plate portion 2211 are respectively connected to the two ends of the flat plate portion 2212 through the two arc plate portions 2213. The two ends of the sliding plate portion 2211 are respectively slidably attached to the outer surface of the two beam pipes 21.

[0082] In some specific examples, such as Figure 9 As shown, the slide plate portion 2211 and the flat plate portion 2212 extend along the front-rear direction, and in the radial direction of the beam pipe 21, the flat plate portion 2212 is located outside the slide plate portion 2211. Furthermore, the two ends of the slide plate portion 2211 in the front-rear direction are respectively connected to the two ends of the flat plate portion 2212 in the front-rear direction via two arc plate portions 2213, and the inner surface of the slide plate portion 2211 in the radial direction of the beam pipe 21 slides against the bottom wall of the groove 213.

[0083] In this embodiment, the slider 221 is configured as an elongated ring extending along a first direction, and includes a sliding plate portion 2211, a flat plate portion 2212, and two arc plate portions 2213. The sliding plate portion 2211 and the flat plate portion 2212 extend along the first direction and are arranged at intervals in the radial direction of the beam pipe 21. The two ends of the sliding plate portion 2211 are respectively connected to the two ends of the flat plate portion 2212 through the two arc plate portions 2213. The two ends of the sliding plate portion 2211 are respectively slidably attached to the outer surface of the two beam pipes 21. This can effectively optimize the structural structure of the slider 221, thereby effectively improving the stability and reliability of the slider 221.

[0084] In one embodiment of the present invention, such as Figure 10 As shown, the sliding unit 22 also includes a support frame 223, which extends along a first direction, and the sliding member 221 is sleeved and fixed on the outside of the support frame 223.

[0085] In this embodiment, by setting a support frame 223 in the sliding unit 22, the support frame 223 extends along the first direction, and the sliding member 221 is sleeved and fixed on the outside of the support frame 223, the structural strength and rigidity of the sliding member 221 can be effectively increased, thereby effectively reducing the reliability of the sliding member 221 in case of damage.

[0086] In one embodiment of the present invention, such as Figure 10 As shown, the support frame 223 includes a connecting plate segment 2231 and two arc plate segments 2232. The connecting plate segment 2231 extends along the first direction into a long strip plate shape. The two arc plate segments 2232 are respectively connected to the two ends of the connecting plate segment 2231 and are respectively adapted to and fit the shape of the two arc plate portions 2213.

[0087] For example Figure 10 As shown, the connecting plate segment 2231 extends into a long strip shape along the front-to-back direction, and two arc plate segments 2232 are respectively connected to the front and rear ends of the connecting plate segment 2231. Furthermore, the two arc plate segments 2232 are respectively adapted to and fit the shape of the two arc plate parts 2213, that is, the connector and the support frame 223 are fitted together, thereby realizing the structural cooperation and positioning of the support frame 223 and the sliding member 221.

[0088] In this embodiment, by setting a connecting plate segment 2231 and two arc plate segments 2232 in the support frame 223, the connecting plate segment 2231 extends into a long strip plate shape along the first direction, and the two arc plate segments 2232 are respectively connected to the two ends of the connecting plate segment 2231, and are respectively adapted to and fit the shape of the two arc plate portions 2213. This makes the fit between the support frame 223 and the sliding member 221 tighter and more reliable, thereby effectively preventing the sliding member 221 from shifting, shaking or falling off during the sliding process.

[0089] In one embodiment of the present invention, such as Figure 9 As shown, the flat plate portion 2212 includes two first plate segments 22121 arranged in a first direction. The opposite ends of the two first plate segments 22121 are respectively connected to two arc plate portions 2213. The opposite ends of the two first plate segments 22121 are spaced apart to fit and define the notch of the sliding member 221. Both first plate segments 22121 are fixedly connected to the support frame 223.

[0090] In some specific examples, such as Figure 9 As shown, two first plate segments 22121 are arranged at intervals in the front-to-back direction. The opposite ends of the two first plate segments 22121 are respectively connected to two arc plate portions 2213, and the facing ends of the two first plate segments 22121 are spaced apart in the front-to-back direction. This allows the sliding member 221 to have a certain elastic deformation capability. Furthermore, both first plate segments 22121 are fixedly connected to the support frame 223, thereby enabling the sliding member 221 and the support frame to be connected together.

[0091] In this embodiment, two first plate segments 22121 arranged in a first direction are provided in the flat plate portion 2212. The opposite ends of the two first plate segments 22121 are respectively connected to two arc plate portions 2213, and the opposite ends of the two first plate segments 22121 are spaced apart to define the notch of the sliding member 221. Both first plate segments 22121 are fixedly connected to the support frame 223, so that the sliding member 221 has a certain elastic deformation capability, thereby avoiding the stress concentration caused by excessive structural rigidity, and thus effectively improving the reliability of the sliding member 221.

[0092] In one embodiment of the present invention, two first plate segments 22121 are detachably connected to the support frame 223, and the spacing between the two first plate segments 22121 is adjustable along the first direction.

[0093] In some specific examples, the two first plate segments 22121 are detachably connected to the support frame 223, which facilitates the maintenance of the sliding member 221 and thus effectively improves the maintenance efficiency of the sliding member 221. Furthermore, the spacing between the two first plate segments 22121 is adjustable, that is, the elastic adaptation range of the sliding member 221 can be adjusted to accommodate the expansion and contraction length, deformation, or installation error of different corrugated outer tubes 10.

[0094] In this embodiment, by setting the two first plate segments 22121 and the support frame 223 to be detachably connected, and by adjusting the spacing between the two first plate segments 22121 along the first direction, it can not only effectively improve the maintenance efficiency of the sliding member 221, but also effectively improve the applicability of the sliding member 221.

[0095] In one embodiment of the present invention, such as Figures 8-10 As shown, the support frame 223 is provided with a plurality of adjustment holes 22331 arranged at intervals along the first direction. The sliding unit 22 also includes: a connecting block 224, which is fixedly connected to one end of each of the two first plate segments 22121. The connecting block 224 has an insertion hole extending along the second direction, which intersects the first direction; and an adjustment pin 225, which extends along the second direction and passes through the insertion hole and any one of the adjustment holes 22331 in sequence.

[0096] In some specific examples, such as Figures 8-10 As shown, the second direction is the left and right direction. The adjusting pin 225 extends in the left and right direction. The adjusting pin 225 can pass through the insertion hole and any one of the adjusting holes 22331. Thus, not only can the sliding member 221 and the support frame 223 be connected together, but the elastic force of the sliding member 221 can also be adjusted.

[0097] This embodiment provides a plurality of adjustment holes 22331 arranged at intervals along a first direction on the support frame 223. The sliding unit 22 also includes: a connecting block 224, which is fixedly connected to one end of each of the two first plate segments 22121 facing each other. The connecting block 224 has an insertion hole extending along a second direction, which intersects with the first direction; and an adjustment pin 225, which extends along the second direction and passes through the insertion hole and any one of the adjustment holes 22331 in sequence. This effectively simplifies the structure of the sliding unit 22 and the adjustment process of the sliding unit 22, thereby improving the convenience of operation.

[0098] In one embodiment of the present invention, such as Figure 8 and Figure 10 As shown, the support frame 223 includes: a connecting plate segment 2231 extending along a first direction, the connecting plate segment 2231 having folded edges 2233 bent away from the sliding plate portion 2211 on both sides in a second direction, a plurality of adjustment holes 22331 being formed on the folded edges 2233 and passing through the folded edges 2233 along the second direction, and a connecting block 224 being arranged between the two folded edges 2233.

[0099] In some specific examples, such as Figure 8 and Figure 10 As shown, the connecting plate segment 2231 extends in the front-back direction, and the left and right sides of the connecting plate segment 2231 are formed with folded edges 2233. Multiple adjustment holes 22331 are formed on the folded edges 2233, and the multiple adjustment holes 22331 pass through the folded edges 2233 in the left-right direction. Furthermore, the connecting block 224 is located between the two sides.

[0100] In this embodiment, a connecting plate segment 2231 extending in the first direction is provided in the support frame 223. The connecting plate segment 2231 has folded edges 2233 bent away from the sliding plate portion 2211 on both sides in the second direction. Multiple adjustment holes 22331 are formed on the folded edges 2233 and pass through the folded edges 2233 in the second direction. The connecting block 224 is arranged between the two folded edges 2233, which can effectively improve the stability of the connection between the sliding member 221 and the support frame 223.

[0101] In one embodiment of the present invention, such as Figure 8 and Figure 10 As shown, baffles 2234 are provided on one side edge of the two folded edges 2233 away from the connecting plate segment 2231. The baffles 2234 on the two folded edges 2233 extend towards each other in the second direction. In the third direction, the connecting block 224 is located between the baffles 2234 and the connecting plate segment 2231. The third direction is the radial direction of the beam pipe 21, and the first direction, the second direction and the third direction are perpendicular to each other.

[0102] In this embodiment, baffles 2234 are provided on the side edges of the two folded edges 2233 that are away from the connecting plate segment 2231. The baffles 2234 on the two folded edges 2233 extend towards each other in the second direction. In the third direction, the connecting block 224 is located between the baffles 2234 and the connecting plate segment 2231. The third direction is the radial direction of the beam pipe 21, and the first direction, the second direction and the third direction are perpendicular to each other. This can further improve the stability of the connecting block 224, thereby further improving the reliability of the sliding member 221.

[0103] In one embodiment of the present invention, such as Figures 3-5As shown, the bellows 100 also includes an elastic connection structure 30, which can undergo elastic deformation along the first direction, and the sliding unit 22 is connected to the two beam pipes 21 through the elastic connection structure 30.

[0104] In some specific examples, such as Figures 3-5 As shown, the elastic connection structure 30 can undergo elastic deformation along the front-to-back direction, and the sliding unit 22 is connected to the two beam pipes 21 through the elastic connection structure 30. Therefore, the elastic connection structure 30 enables the sliding member 221 to automatically adjust its position when the corrugated outer tube 10 expands and contracts, avoiding jamming or wear caused by rigid connection, thereby effectively coping with the axial deformation of the corrugated outer tube 10 during use.

[0105] In this embodiment, an elastic connection structure 30 is provided in the corrugated pipe 100. The elastic connection structure 30 can undergo elastic deformation along the first direction. The sliding unit 22 is connected to the two beam pipes 21 through the elastic connection structure 30, so that the sliding member 221 can automatically adjust its position when the corrugated outer pipe 10 expands and contracts, avoiding jamming or wear caused by rigid connection, thereby effectively improving the reliability of the sliding member 221.

[0106] In one embodiment of the present invention, such as Figures 3-5 As shown, the two beam tubes 21 are a first beam tube 211 and a second beam tube 212, respectively. The corrugated tube 100 also includes a first fixing ring 40 and a second fixing ring 50. The first fixing ring 40 is sleeved and fixed on the outside of the first beam tube 211 and extends outward along the radial direction of the first beam tube 211. The second fixing ring 50 is sleeved and fixed on the outside of the second beam tube 212 and extends outward along the radial direction of the second beam tube 212. The limiting structure 60 includes a limiting rod 61, which extends in a first direction. One end of the limiting rod 61 is fixedly connected to the first fixing ring 40, and the other end of the limiting rod 61 is movably connected to the second fixing ring 50.

[0107] In some specific examples, such as Figures 3-5 As shown, the elastic connection structure 30 includes: a synchronization ring 31, which extends in a ring shape along the circumference of the beam pipe 21, and a sliding unit 22 fixed on the synchronization ring 31; a first elastic member 32, which is arranged on one side of the synchronization ring 31 in the first direction and extends along the first direction, and is connected between the first beam pipe 211 and the synchronization ring 31; and a second elastic member 33, which is arranged on the other side of the synchronization ring 31 in the first direction and extends along the first direction, and is connected between the second beam pipe 212 and the synchronization ring 31.

[0108] In some specific examples, such as Figures 3-5As shown, the first beam tube 211 is located in front of the second beam tube 212, and the synchronization ring 31 is fixedly connected to the sliding unit 22. Further, the first elastic member 32 and the second elastic member 33 both extend in the front-back direction and are respectively arranged on both sides of the synchronization ring 31 in the front-back direction. The rear end of the first elastic member 32 is connected to the synchronization ring 31, and the front end of the second elastic member 33 is connected to the synchronization ring 31.

[0109] In some specific examples, such as Figures 3-5 As shown, the first fixing ring 40 is located in front of the second fixing ring 50. The first fixing ring 40 is sleeved and fixed at the front end of the first beam tube 211, and the second fixing ring 50 is sleeved and fixed at the rear end of the second beam tube 212. The front end of the first elastic member 32 is connected to the first fixing ring 40, and the rear end of the first elastic member 32 is connected to the synchronization ring 31. The rear end of the second elastic member 33 is connected to the second fixing ring 50, and the front end of the second elastic member 33 is connected to the synchronization ring 31.

[0110] In some specific examples, such as Figures 3-5 As shown, the limiting rod 61 extends in the front-to-back direction. The front end of the limiting rod 61 is connected to the first fixing ring 40, and the rear end of the limiting rod 61 is movably connected to the second fixing ring 50. Thus, the first beam tube 211 and the second beam tube 212 have a limited relative range of motion.

[0111] In this embodiment, a first fixing ring 40 and a second fixing ring 50 are provided in the bellows 100. The first fixing ring 40 is sleeved and fixed on the outside of the first beam tube 211 and extends outward along the radial direction of the first beam tube 211. The second fixing ring 50 is sleeved and fixed on the outside of the second beam tube 212 and extends outward along the radial direction of the second beam tube 212. The limiting structure 60 includes a limiting rod 61, which extends in a first direction. One end of the limiting rod 61 is fixedly connected to the first fixing ring 40, and the other end of the limiting rod 61 is movably connected to the second fixing ring 50. This can effectively improve the reliability of the connection between the limiting rod 61 and the first beam tube 211 and the second beam tube 212.

[0112] In one embodiment of the present invention, such as Figures 3-5 As shown, there are multiple first elastic elements 32 arranged at intervals along the circumference of the first beam tube 211, and multiple second elastic elements 33 arranged at intervals along the circumference of the second beam tube 212. The multiple first elastic elements 32 correspond one-to-one with the multiple second elastic elements 33 and are directly opposite each other in the first direction. For example, the number of first elastic elements 32 and second elastic elements 33 can be four, five, six, seven, or more than eight.

[0113] This embodiment sets the number of first elastic elements 32 to multiple and arranges them at intervals along the circumference of the first beam tube 211, and sets the number of second elastic elements 33 to multiple and arranges them at intervals along the circumference of the second beam tube 212. The multiple first elastic elements 32 correspond one-to-one with the multiple second elastic elements 33 and face each other in the first direction. This can effectively improve the force balance of the synchronization ring 31 in the circumferential direction of the beam tube 21, thereby effectively reducing the risk of local stress concentration.

[0114] In one embodiment of the present invention, such as Figure 12 As shown, the first fixing ring 40 is provided with a fixing hole, the second fixing ring 50 is provided with a limiting hole, one end of the limiting rod 61 is inserted and fixed in the fixing hole, and the other end of the limiting rod 61 is movably inserted in the limiting hole.

[0115] In this embodiment, a fixing hole is provided on the first fixing ring 40, and a limiting hole is provided on the second fixing ring 50. One end of the limiting rod 61 is inserted and fixed in the fixing hole, and the other end of the limiting rod 61 is movably inserted in the limiting hole, which can effectively ensure the flexibility of the limiting rod 61.

[0116] In one embodiment of the present invention, such as Figure 12 As shown, the other end of the limiting rod 61 is clearance-fitted with the limiting hole. The limiting structure 60 also includes a first limiting member and a second limiting member. The first limiting member and the second limiting member are both sleeved and fixed on the other end of the limiting rod 61 and are located on both sides of the second fixing ring 50, respectively. The distance between the first limiting member and the second limiting member is greater than the depth of the limiting hole.

[0117] In some specific examples, such as Figure 12 As shown, both the first and second limiting members are sleeved and fixed to the rear end of the limiting rod 61, and are located on the front and rear sides of the second fixing ring 50, respectively. Furthermore, the distance between the first and second limiting members is greater than the depth of the limiting hole in the front-rear direction, and the diameter of the limiting rod 61 is smaller than the diameter of the limiting hole, thereby allowing the rear end of the limiting rod 61 to move within the limiting hole.

[0118] In this embodiment, the other end of the limiting rod 61 and the limiting hole are configured with a clearance fit. The limiting structure 60 also includes a first limiting member and a second limiting member. The first limiting member and the second limiting member are both sleeved and fixed on the other end of the limiting rod 61 and are located on both sides of the second fixing ring 50, respectively. The distance between the first limiting member and the second limiting member is greater than the depth of the limiting hole. This not only ensures the relative mobility between the other end of the limiting rod 61 and the limiting hole, but also avoids the other end of the limiting rod 61 from having an excessive range of motion, thereby effectively improving the reliability of the limiting structure 60.

[0119] In one embodiment of the present invention, such as Figure 12 As shown, the relative positions of the first limiting member and the second limiting member on the limiting rod 61 are adjustable along the first direction.

[0120] In this embodiment, the relative positions of the first limiting member and the second limiting member on the limiting rod 61 are set to be adjustable along the first direction, so that the formation of the other end of the limiting rod 61 in the first direction is adjustable, thereby effectively improving the applicability of the limiting structure 60.

[0121] In one embodiment of the present invention, such as Figure 12 As shown, the other end of the limiting rod 61 has an external thread, and the first limiting member and the second limiting member are both limiting nuts, which are threaded onto the limiting rod 61.

[0122] In some specific examples, such as Figure 12 As shown, the limiting nut includes a first limiting nut 62 and a second limiting nut 63. The first limiting nut 62 and the second limiting nut 63 are located on both sides of the second fixing ring 50 in the front-back direction, which can effectively limit the distance that the other end of the limiting rod 61 moves in the first direction.

[0123] In this embodiment, by forming an external thread at the other end of the limiting rod 61, and by having both the first and second limiting components be limiting nuts, which are threaded onto the limiting rod 61, the construction of the limiting structure 60 can be effectively simplified, thereby effectively reducing costs.

[0124] In one embodiment of the present invention, such as Figures 3-5 As shown, there are multiple limiting rods 61, which are arranged at intervals along the circumference of the beam pipe 21. For example, the number of limiting rods 61 can be four, five, six, seven, or more.

[0125] In this embodiment, by setting the number of limiting rods 61 to multiple, and arranging the multiple limiting rods 61 at intervals along the circumference of the beam pipe 21, it is possible to avoid excessive force on a single limiting rod 61, thereby effectively protecting the limiting rod 61.

[0126] In one embodiment of the present invention, such as Figures 3-5 As shown, the first fixing ring 40 has a first fixing part 41 extending along the first direction. The first fixing part 41 is annular and sleeved on the outside of the first beam tube 211. The first fixing part 41 is connected to the first beam tube 211 by a first fastener. The second fixing ring 50 has a second fixing part 51 extending along the first direction. The second fixing part 51 is annular and sleeved on the outside of the second beam tube 212. The second fixing part 51 is connected to the second beam tube 212 by a second fastener.

[0127] In this embodiment, by setting the first fixing part 41 as an annular shape and sleeved on the outside of the first beam tube 211, and connecting the first fixing part 41 to the first beam tube 211 through a first fastener, and setting the second fixing part 51 as an annular shape and sleeved on the outside of the second beam tube 212, and connecting the second fixing part 51 to the second beam tube 212 through a second fastener, the structural strength of the first fixing ring 40 and the second fixing ring 50 can be effectively strengthened, thereby effectively improving the durability of the first fixing ring 40 and the second fixing ring 50.

[0128] In one embodiment of the present invention, such as Figure 5 , Figure 6 and Figure 11 As shown, a plurality of first fastening holes are formed on the first fixing part 41 at intervals along the circumference of the first fixing part 41, and a first fixing groove 2111 extending in an annular shape along the circumference of the beam pipe 21 is formed on the outer peripheral wall of the first beam tube 211. The first fastener passes through the first fastening hole and extends into and is fixed in the first fixing groove 2111. A plurality of second fastening holes are formed on the second fixing part 51 at intervals along the circumference of the second fixing part 51, and a second fixing groove 2121 extending in an annular shape along the circumference of the beam pipe 21 is formed on the outer peripheral wall of the second beam tube 212. The second fastener passes through the second fastening hole and extends into and is fixed in the second fixing groove 2121.

[0129] In some specific examples, such as Figure 5 and Figure 11 As shown, a plurality of first fastening holes are formed on the first fixing part 41 at intervals along the circumference of the first fixing part 41. The first fastening holes penetrate the first fixing part 41 radially along the beam pipe 21. A first fixing groove 2111 extending in annular shape along the circumference of the beam pipe 21 is formed on the outer peripheral wall of the first beam pipe 211. For example, Figure 11 As shown, the first fastener is a screw, which extends through the first fastening hole and is fixed in the first fixing groove 2111.

[0130] In some specific examples, such as Figure 5 and Figure 11 As shown, a plurality of second fastening holes are formed on the second fixing part 51 at intervals along the circumference of the second fixing part 51. The second fastening holes penetrate the second fixing part 51 radially along the beam pipe 21. A second fixing groove 2121 extending in annular shape along the circumference of the beam pipe 21 is formed on the outer peripheral wall of the second beam pipe 212. The second fastener is a screw, which passes through the first fastening hole and extends into and is fixed in the first fixing groove 2111.

[0131] In this embodiment, a plurality of first fastening holes are formed on the first fixing part 41 at intervals along the circumference of the first fixing part 41, and a first fixing groove 2111 extending in an annular shape along the circumference of the beam pipe 21 is formed on the outer peripheral wall of the first beam tube 211. The first fastener passes through the first fastening holes and extends into and is fixed in the first fixing groove 2111. A plurality of second fastening holes are formed on the second fixing part 51 at intervals along the circumference of the second fixing part 51, and a second fixing groove 2121 extending in an annular shape along the circumference of the beam pipe 21 is formed on the outer peripheral wall of the second beam tube 212. The second fastener passes through the second fastening holes and extends into and is fixed in the second fixing groove 2121. This effectively simplifies the connection between the first fixing part 41 and the first beam tube 211, and between the second fixing part 51 and the second beam tube 212, thereby effectively improving the convenience of assembly.

[0132] In one embodiment of the present invention, such as Figures 3-7 As shown, grooves 213 are formed on the outer peripheral walls of the two beam pipes 21. The two grooves 213 face each other in the first direction. The two ends of the sliding member 221 are respectively located in the two grooves 213 and slide against the bottom wall of the grooves 213.

[0133] In some specific examples, such as Figures 3-7 As shown, the outer peripheral wall of the beam pipe 21 is recessed from the outside to the inside along the radial direction of the beam pipe 21 to form a groove 213. The grooves 213 on the outer peripheral wall of the two beam pipes 21 are facing each other in the front-back direction. The two ends of the sliding member 221 are respectively located in the two grooves 213 and slide against the bottom wall of the groove 213.

[0134] In this embodiment, grooves 213 are formed on the outer peripheral walls of the two beam pipes 21, and the two grooves 213 face each other in the first direction. The two ends of the slider 221 are respectively located in the two grooves 213 and slide against the bottom wall of the grooves 213, which enables the slider 221 to slide in the two grooves 213, thereby effectively improving the sliding stability of the slider 221.

[0135] In one embodiment of the present invention, such as Figures 3-5 As shown, there are multiple sliding units 22, which are arranged at intervals along the circumference of the beam pipe 21.

[0136] In some specific examples, such as Figures 3-5 As shown, the number of sliding units 22 can be four, five, six, seven or eight or more. Multiple sliding units 22 are arranged at intervals along the circumference of the beam pipe 21. This not only effectively reduces the resistance between the corrugated outer tube 10 and the shield, but also avoids the risk of damage to the sliding unit 22 due to excessive resistance of a single sliding unit 22, thereby effectively improving the reliability of the sliding unit 22.

[0137] In one embodiment of the present invention, such as Figure 2 As shown, the corrugated outer pipe 10 includes: a pipe body 11, the axis of which extends along a first direction; two connecting pipes 12, which are respectively connected to both ends of the pipe body 11; and two flanges 13, which are respectively connected to the ends of the two connecting pipes 12 opposite to the pipe body 11. In some specific examples, such as Figure 2 As shown, the corrugated outer pipe 10 also includes two transition rings 14, which are respectively located at both ends of the pipe body 11 in the front-rear direction, and the transition rings 14 are located between the connecting pipe 12 and the pipe body 11.

[0138] This embodiment simplifies the structure of the corrugated outer tube 10 by providing a tube body 11, two connecting pipes 12 and two flanges 13 in the corrugated outer tube 10. The axis of the tube body 11 extends along a first direction. The two connecting pipes 12 are respectively connected to both ends of the tube body 11, and the two flanges 13 are respectively connected to the ends of the two connecting pipes 12 opposite to the tube body 11. This facilitates the production and manufacturing of the corrugated outer tube 10.

[0139] In one embodiment of the present invention, such as Figure 2 and Figure 13 As shown, the inner circumferential wall of the corrugated outer tube 10 is provided with a plurality of mounting protrusions 121 arranged at intervals along the circumference of the corrugated outer tube 10. The shielding tube 20 also includes two connecting end plates 23. The two connecting end plates 23 are annular and are respectively sleeved and fixed to the opposite ends of the two beam pipes 21 in the first direction. The connecting end plates 23 are fixed to the mounting protrusions 121 by fasteners.

[0140] For example, the number of bumps 121 installed can be three, four, five, six, or more than seven. In some specific examples, such as Figure 2 and Figure 13 As shown, the inner peripheral wall of the connector 12 is provided with a plurality of mounting protrusions 121 arranged at intervals along the circumference of the corrugated outer tube 10. The connecting end plate 23 is fixed to the mounting protrusions 121 by fasteners, thereby enabling the shielding tube 20 to be installed on the corrugated outer tube 10.

[0141] In this embodiment, multiple mounting protrusions 121 are provided on the inner peripheral wall of the corrugated outer tube 10, arranged at intervals along the circumference of the corrugated outer tube 10. The shielding tube 20 also includes two connecting end plates 23. The two connecting end plates 23 are annular and are respectively sleeved and fixed to the opposite ends of the two beam pipes 21 in the first direction. The connecting end plates 23 are fixed to the mounting protrusions 121 by fasteners, which can effectively improve the reliability of the connection between the shielding tube 20 and the corrugated outer tube 10.

[0142] A synchrotron radiation accelerator according to a second aspect of the present invention includes: a plurality of vacuum chambers; and a bellows 100 according to a first aspect of the present invention, the bellows 100 being connected between two adjacent vacuum chambers.

[0143] According to the second aspect of the present invention, by providing the bellows 100 of the first aspect, high-order mode leakage and electron beam instability can be effectively suppressed, and the heating phenomenon caused by excessive wall resistance of the bellows 10 can be avoided. At the same time, the bellows 100 has a reliable deformation compensation function, thereby significantly improving the reliability and applicability of the synchrotron.

[0144] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0145] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0146] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0147] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0148] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A corrugated pipe, characterized in that, include: A corrugated outer tube, the corrugated outer tube extending along a first direction; A shielding tube, the shielding tube being arranged radially inside the corrugated outer tube and comprising: Two beam channels extend along the first direction and are spaced apart in the first direction. The opposite ends of the two beam channels are fixed to the corrugated outer tube, while the two beam channels are relatively movable. A sliding unit, the sliding unit including a sliding member extending along the first direction, the sliding member being a conductive member, the two ends of the sliding member being respectively configured to always slidably fit against the beam pipe on the same side along the first direction; A limiting structure is connected between the two beam channels, and the limiting structure is configured to limit the relative displacement of the two beam channels in the axial, radial and / or circumferential directions; The two beam channels are a first beam tube and a second beam tube, respectively. The corrugated tube further includes a first fixing ring and a second fixing ring. The first fixing ring is sleeved and fixed on the outside of the first beam tube and extends outward along the radial direction of the first beam tube. The second fixing ring is sleeved and fixed on the outside of the second beam tube and extends outward along the radial direction of the second beam tube. The limiting structure includes: a limiting rod extending along the first direction, one end of the limiting rod being fixedly connected to the first fixing ring, and the other end of the limiting rod being movably connected to the second fixing ring; The first fixing ring is provided with a fixing hole, the second fixing ring is provided with a limiting hole, one end of the limiting rod is inserted and fixed in the fixing hole, and the other end of the limiting rod is movably inserted in the limiting hole; The other end of the limiting rod is clearance-fitted with the limiting hole. The limiting structure further includes: a first limiting member and a second limiting member, both of which are sleeved and fixed to the other end of the limiting rod and are located on both sides of the second fixing ring, and the distance between the first limiting member and the second limiting member is greater than the depth of the limiting hole.

2. The corrugated pipe according to claim 1, characterized in that, Along the first direction, the relative positions of the first limiting member and the second limiting member on the limiting rod are adjustable.

3. The corrugated pipe according to claim 2, characterized in that, The other end of the limiting rod has an external thread, and the first limiting member and the second limiting member are both limiting nuts, which are threaded onto the limiting rod.

4. The corrugated pipe according to claim 1, characterized in that, The number of limiting rods is multiple, and the multiple limiting rods are arranged at intervals along the circumference of the beam pipe.

5. The corrugated pipe according to claim 1, characterized in that, The first fixing ring has a first fixing part extending along the first direction. The first fixing part is annular and sleeved on the outside of the first beam tube. The first fixing part is connected to the first beam tube by a first fastener. The second fixing ring has a second fixing part extending along the first direction. The second fixing part is annular and sleeved on the outside of the second beam tube. The second fixing part is connected to the second beam tube by a second fastener.

6. The corrugated pipe according to claim 5, characterized in that, The first fixing part has a plurality of first fastening holes arranged at intervals along the circumference of the first fixing part, and the outer peripheral wall of the first beam tube has a first fixing groove extending in an annular shape along the circumference of the beam tube. The first fastener passes through the first fastening holes and extends into and is fixed in the first fixing groove. The second fixing part has a plurality of second fastening holes arranged at intervals along the circumference of the second fixing part, and the outer peripheral wall of the second beam tube has a second fixing groove extending in an annular shape along the circumference of the beam tube. The second fastener passes through the second fastening holes and extends into and is fixed in the second fixing groove.

7. The corrugated pipe according to claim 1, characterized in that, Grooves are formed on the outer peripheral walls of both beam pipes. The two grooves face each other in the first direction. The two ends of the sliding member are respectively located in the two grooves and slide against the bottom wall of the groove.

8. The corrugated pipe according to claim 1, characterized in that, The number of sliding units is multiple, and the multiple sliding units are arranged at intervals along the circumference of the beam pipe.

9. The corrugated pipe according to claim 1, characterized in that, The corrugated outer tube includes: A tube body, the axis of which extends along the first direction; Two connecting pipes are respectively connected to both ends of the pipe body; Two flanges are respectively connected to the ends of the two connecting pipes opposite to the pipe body.

10. The corrugated pipe according to claim 1, characterized in that, The inner circumferential wall of the corrugated outer tube is provided with a plurality of mounting protrusions arranged at intervals along the circumference of the corrugated outer tube. The shielding tube also includes two connecting end plates, which are annular and respectively sleeved and fixed to the opposite ends of the two beam pipes in the first direction. The connecting end plates are fixed to the mounting protrusions by fasteners.

11. A synchrotron radiation accelerator, characterized in that, include: Multiple vacuum chambers; The bellows according to any one of claims 1-10 is connected between two adjacent vacuum chambers.

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