Corrugated pipe and synchrotron radiation accelerator with same

Abstract

The invention discloses a corrugated pipe and a synchrotron radiation accelerator with the corrugated pipe, and the corrugated pipe comprises a corrugated outer pipe which extends along a first direction; the shielding pipe is arranged on the radial inner side of the corrugated outer pipe and comprises two beam current pipelines, the two beam current pipelines extend in the first direction and are arranged at intervals in the first direction, and the opposite ends of the two beam current pipelines are fixed to the corrugated outer pipe; the sliding unit comprises a sliding part extending in the first direction, the sliding part is a conductive part, and the two ends of the sliding part are configured to be attached to the beam pipelines on the same side in the first direction in a sliding mode all the time. According to the corrugated pipe, high-order mode leakage and electron beam instability can be effectively restrained, the heating phenomenon caused by too large resistance of the corrugated outer pipe wall is avoided, meanwhile, the corrugated pipe has a reliable deformation compensation function, and therefore the reliability and applicability of the corrugated pipe are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of synchrotron radiation shielding, in particular to a bellows and a synchrotron accelerator with the same. BACKGROUND

[0002] The vacuum chamber in the synchrotron accelerator is usually composed of multiple modular units, and the vacuum chamber units are connected to form a ring by bellows. Since the wall resistance of the bellows is much larger than that of the vacuum chamber pipe wall, the wall current on the bellows will generate a high heat load, which may seriously damage the bellows, and the bellows have a deformation requirement, therefore, the conventional bellows is not suitable for connecting the high-current beam vacuum chamber.

[0003] In the prior art, a high-frequency shielding mechanism is usually arranged in the conventional bellows to shield the electron beam, and the wall resistance of the outer bellows is usually large, which may easily cause the outer bellows to generate excessive heat and reduce reliability. At the same time, the conventional shielding bellows has a limited axial adjustment stroke range of the beam pipe and limited radial and angle compensation capability, which limits the application scenarios. SUMMARY

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

[0005] The present application also proposes a synchrotron accelerator with the above-mentioned bellows.

[0006] According to the bellows of the first aspect of the present application, the bellows comprises: a bellows outer pipe extending along a first direction; a shielding pipe arranged radially inside the bellows outer pipe and comprising: two beam pipes extending along the first direction and arranged at intervals in the first direction, and the opposite ends of the two beam pipes being fixed to the bellows outer pipe respectively, the two beam pipes being relatively movable, a sliding unit comprising a sliding member extending along the first direction, the sliding member being a conductive member, and the two ends of the sliding member being configured to be always slidably attached to the beam pipe on the same side along the first direction; and a limiting structure connected between the two beam pipes, the limiting structure being configured to limit the relative displacement of the two beam pipes in the axial, radial and / or circumferential directions.

[0007] According to the bellows of the present application, by arranging the bellows outer tube, the shielding tube and the limiting structure in the bellows, the bellows outer tube extends along the first direction, the shielding tube is arranged on the radially inner side of the bellows outer tube and comprises two beam tubes and a sliding unit, the two beam tubes extend along the first direction and are arranged at intervals in the first direction, and the two beam tubes are respectively fixed at the opposite ends of the bellows outer tube and are relatively movable, the sliding unit comprises a sliding piece extending along the first direction, the sliding piece is a conductive piece, and the two ends of the sliding piece are respectively configured to be always slidably attached to the beam tube on the same side along the first direction, and the limiting structure is connected between the two beam tubes, and is configured to limit the relative displacement of the two beam tubes in the axial direction, the radial direction and / or the circumferential direction, so as to effectively suppress the high-order mode leakage and the electron beam instability, avoid the heating phenomenon caused by the excessive wall resistance of the bellows outer tube, and enable the bellows to have reliable deformation compensation function, thereby significantly improving the reliability and applicability of the bellows.

[0008] In some embodiments, the two beam tubes are respectively a first beam tube and a second beam tube, and the bellows further comprises a first fixing ring and a second fixing ring, the first fixing ring is sleeved and fixed on the outer side 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 outer side of the second beam tube and extends outward along the radial direction of the second beam tube, and the limiting structure comprises a limiting rod, the limiting rod extends along the first direction, one end of the limiting rod is fixedly connected with the first fixing ring, and the other end of the limiting rod is movably connected with 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 is sleeved and fixed in the fixing hole, and the other end of the limiting rod is movably sleeved in the limiting hole.

[0010] In some embodiments, the other end of the limiting rod is in clearance fit with the limiting hole, and the limiting structure further comprises a first limiting piece and a second limiting piece, the first limiting piece and the second limiting piece are both sleeved and fixed on the other end of the limiting rod and are respectively located on the two sides of the second fixing ring, and the spacing between the first limiting piece and the second limiting piece is greater than the depth of the limiting hole.

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

[0012] In some embodiments, the other end of the limiting rod is formed with external threads, the first limiting piece and the second limiting piece are both limiting nuts, and are sleeved on the limiting rod in a threaded manner.

[0013] In some embodiments, the number of the limiting rods is multiple, and the multiple limiting rods are arranged along the circumference of the beam pipe.

[0014] In some embodiments, the first fixing ring has a first fixing part extending along the first direction, the first fixing part is annular and is sleeved outside the first beam pipe, and the first fixing part is connected with the first beam pipe through a first fastener; the second fixing ring has a second fixing part extending along the first direction, the second fixing part is annular and is sleeved outside the second beam pipe, and the second fixing part is connected with the second beam pipe through a second fastener.

[0015] In some embodiments, a plurality of first fastening holes are formed on the first fixing part and are arranged along the circumference of the first fixing part, an annular first fixing groove extending along the circumference of the beam pipe is formed on the outer peripheral wall of the first beam pipe, and the first fastener penetrates the first fastening hole and is fixed in the first fixing groove; a plurality of second fastening holes are formed on the second fixing part and are arranged along the circumference of the second fixing part, an annular second fixing groove extending along the circumference of the beam pipe is formed on the outer peripheral wall of the second beam pipe, and the second fastener penetrates the second fastening hole and is fixed in the second fixing groove.

[0016] In some embodiments, grooves are formed on the outer peripheral walls of the two beam pipes, the two grooves face each other in the first direction, and the two ends of the sliding member are respectively arranged in the two grooves and are in sliding fit with the bottom walls of the grooves.

[0017] In some embodiments, the number of the sliding units is multiple, and the multiple sliding units are arranged along the circumference of the beam pipe.

[0018] In some embodiments, the corrugated outer pipe comprises: a pipe body, an axis of the pipe body extending along the first direction; two pipe connectors, the two pipe connectors being respectively connected to two ends of the pipe body; and two flanges, the two flanges being respectively connected to ends of the two pipe connectors away from the pipe body.

[0019] In some embodiments, the inner peripheral wall of the corrugated outer pipe is provided with a plurality of mounting protrusions arranged along the circumference of the corrugated outer pipe, and the shielding pipe further comprises two connecting end plates, the two connecting end plates being annular and being respectively sleeved and fixed on ends of the two beam pipes away from each other in the first direction, and the connecting end plates being fixed with the mounting protrusions through fasteners.

[0020] The synchrotron accelerator according to the second aspect of the present application comprises: a plurality of vacuum chambers; and the bellows according to the first aspect of the present application, which is connected between two adjacent vacuum chambers.

[0021] The synchrotron accelerator according to the second aspect of the present application, by arranging the bellows according to the first aspect of the present application, can effectively suppress high-order mode leakage and electron beam instability, avoid the heating phenomenon caused by excessive resistance of the outer tube wall of the bellows, and make the bellows have reliable deformation compensation function, thereby significantly improving the reliability and applicability of the synchrotron accelerator.

[0022] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of a bellows according to an embodiment of the present application;

[0024] Figure 2 is a schematic view of an outer tube of a bellows according to an embodiment of the present application;

[0025] Figure 3 is a schematic view of a shield tube from one angle according to an embodiment of the present application;

[0026] Figure 4 is a schematic view of a shield tube from another angle according to an embodiment of the present application;

[0027] Figure 5 is a schematic view of a shield tube from yet another angle according to an embodiment of the present application;

[0028] Figure 6 is a schematic view of a beam duct from one angle according to an embodiment of the present application;

[0029] Figure 7 is a schematic view of a beam duct from another angle according to an embodiment of the present application;

[0030] Figure 8 is a schematic view of a sliding unit according to an embodiment of the present application;

[0031] Figure 9 is a schematic view of a sliding member according to an embodiment of the present application;

[0032] Figure 10 is a schematic view of a support framework according to an embodiment of the present application;

[0033] Figure 11 is a sectional view of a shield tube according to an embodiment of the present application;

[0034] Figure 12Fig. 1 is a schematic view of a limiting structure according to an embodiment of the present application;

[0035] Figure 13 Fig. 2 is a schematic view of a connector according to an embodiment of the present application;

[0036] Figure 14 Fig. 3 is a schematic view of a connecting end plate according to an embodiment of the present application.

[0037] Reference signs:

[0038] 100, bellows;

[0039] 10, outer bellows;

[0040] 11, tube body;

[0041] 12, connector;

[0042] 13, flange;

[0043] 14, adapter ring;

[0044] 20, shield tube;

[0045] 21, beam tube; 211, first beam tube; 2111, first fixing groove; 212, second beam tube; 2121, second fixing groove;

[0046] 213, groove;

[0047] 214, mounting table;

[0048] 22, sliding unit;

[0049] 221, slider; 2211, sliding plate part; 22111, avoiding hole; 2212, flat plate part; 22121, first plate segment; 2213, arc plate part;

[0050] 222, abutting member;

[0051] 223, support framework; 2231, connecting plate segment; 2232, arc plate segment; 2233, folded edge; 22331, adjusting hole; 2234, baffle;

[0052] 224, connecting block;

[0053] 225, adjusting pin;

[0054] 23, connecting end plate;

[0055] 30, elastic connecting structure;

[0056] 31, synchronizing ring;

[0057] 32, first elastic member;

[0058] 33. A second elastic member;

[0059] 40. A first fixing ring; 41. A first fixing part;

[0060] 50. A second fixing ring; 51. A second fixing part;

[0061] 60. A limiting structure;

[0062] 61. A limiting rod;

[0063] 62. A first limiting nut;

[0064] 63. A second limiting nut. DETAILED DESCRIPTION

[0065] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like signs denote like elements or elements having the same or similar functionality throughout the drawings and written description. The embodiments described below are exemplary in nature and are intended to be illustrative of the present application, but are not to be in any way limiting of the present application.

[0066] Reference is made below to Figures 1-14 a bellows 100 according to an embodiment of the first aspect of the present application.

[0067] As shown in Figures 1-8 , the bellows 100 according to an embodiment of the first aspect of the present application comprises a corrugated outer tube 10, a shield tube 20, and a limiting structure 60.

[0068] The corrugated outer tube 10 extends along a first direction; the shield tube 20 is arranged radially inward of the corrugated outer tube 10 and comprises two beam tubes 21 and a sliding unit 22, the two beam tubes 21 extend along the first direction and are arranged spaced apart in the first direction, and the two beam tubes 21 are respectively fixed at opposite ends thereof to the corrugated outer tube 10, the two beam tubes 21 are relatively movable, the sliding unit 22 comprises a sliding member 221 extending along the first direction, the sliding member 221 is an electrically conductive member, and two ends of the sliding member 221 are respectively configured to be always slidably fitted along the first direction to the beam tube 21 on the same side; the limiting structure 60 is connected between the two beam tubes, and the limiting structure 60 is configured to limit the relative displacement of the two beam tubes 21 in the axial, radial, and / or circumferential directions.

[0069] In some specific examples, as shown in Figure 1 and Figure 2 , the first direction is a front-rear direction, the corrugated outer tube 10 extends along the front-rear direction and is arranged outside the shield tube 20. For example Figures 3-7As shown, the two beam pipes 21 are arranged in the front-rear direction and are spaced apart in the first direction. Further, the two beam pipes 21 are fixed at the ends thereof away from each other to the corrugated outer tube 10 and are movable relative to each other, so as to effectively meet the deformation requirement of the corrugated tube 100.

[0070] In some specific examples, as shown in FIG. 2, the sliding member 221 extends in the front-rear direction, the front end of the sliding member 221 is capable of slidingly abutting the front beam pipe 21, and the rear end of the sliding member 221 is capable of slidingly abutting the rear beam pipe 21. Further, the sliding member 221 is an electrically conductive member, so as to form a wall current path between the corrugated outer tube 10 and the shield tube 20. Figure 8 As shown, the sliding member 221 extends in the front-rear direction, the front end of the sliding member 221 is capable of slidingly abutting the front beam pipe 21, and the rear end of the sliding member 221 is capable of slidingly abutting the rear beam pipe 21. Further, the sliding member 221 is an electrically conductive member, so as to form a wall current path between the corrugated outer tube 10 and the shield tube 20.

[0071] In the present embodiment, since the two ends of the sliding member 221 are capable of slidingly abutting the beam pipes 21 on the same side in the first direction, and the sliding member 221 is an electrically conductive member, when the electron beam passes through the corrugated tube 100, a continuous mirror wall current path is formed between the corrugated outer tube 10 and the shield tube 20, and good electrical contact is maintained. The mirror currents flow along the electrically conductive wall, forming an electromagnetic shielding effect, so as to effectively suppress high-order mode leakage and electron beam instability. In addition, since the two ends of the sliding member 221 are always capable of slidingly abutting the beam pipes 21 on the same side in the first direction, the phenomenon of overheating damage caused by excessive wall resistance of the corrugated outer tube 10 can be avoided. Figures 3-5 As shown, the limiting structure 60 limits the relative displacement of the two beam pipes 21 in the axial, radial and circumferential directions, so as to not only meet the deformation requirement of the corrugated tube 100, but also avoid excessive deformation of the corrugated tube 100.

[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 andFigure 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 asFigure 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., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

2. The corrugated pipe according to claim 1, characterized in that, 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 radially outward along the first beam tube. The second fixing ring is sleeved and fixed on the outside of the second beam tube and extends radially outward along the second beam tube. The limiting structure includes a limiting rod extending along the first direction, one end of which is fixedly connected to the first fixing ring, and the other end of which is movably connected to the second fixing ring.

3. The corrugated pipe according to claim 2, characterized in that, The first fixing ring has a fixing hole, the second fixing ring has 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 can be movably passed through the limiting hole.

4. The corrugated pipe according to claim 3, characterized in that, 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.

5. The corrugated pipe according to claim 4, 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.

6. The corrugated pipe according to claim 5, 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.

7. The corrugated pipe according to claim 2, 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.

8. The corrugated pipe according to claim 2, 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.

9. The corrugated pipe according to claim 8, 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.

10. 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.

11. 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.

12. 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.

13. 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.

14. A synchrotron radiation accelerator, characterized in that, include: Multiple vacuum chambers; The bellows according to any one of claims 1-13 is connected between two adjacent vacuum chambers.

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