Double-gap adjustable sealing telescopic structure between vacuum maglev pipeline beam segments

Abstract

The invention relates to the technical field of vacuum high-speed maglev transportation, and in particular to a double-gap adjustable sealed telescopic structure between beam segments of a vacuum maglev pipeline. The structure effectively solves the problem that the deformation of a vacuum maglev pipeline under the action of temperature stress affects the normal operation of a maglev train, significantly improves the joint length of the vacuum pipeline, and is particularly suitable for working conditions where the length difference between two adjacent pipe segments is large. The structure avoids the problem of inconsistent expansion joint width settings caused by inconsistent spans of pipe segments on both sides, effectively solves the span adjustment problem of the vacuum maglev pipeline, and simultaneously ensures the air tightness in the vacuum pipeline, improves the running safety of a high-speed maglev train in the vacuum pipeline, ensures the stability of the vacuum pipeline maglev train, has low structural construction difficulty, and is of great significance to the actual operation of future vacuum maglev trains.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum high-speed maglev transportation, and in particular to a double-gap adjustable sealing telescopic structure between vacuum maglev pipeline beam segments. Background Art

[0002] Vacuum high-speed maglev transportation technology is a technology that combines vacuum pipes and maglev technologies. Due to breaking through the constraints of air resistance, noise and wheel-rail adhesion, the speed can reach 600~1000km / h, filling the speed gap between high-speed rail and air transportation; with the breakthrough of high-power traction drive technology, it can reach 1000km / h and above, or even higher speeds of supersonic or times the speed of sound, becoming a long-distance city or ultra-long-distance intercontinental transportation mode to make up for or replace aviation in the future.

[0003] The primary difficulty of vacuum pipeline transportation technology is how to provide a vacuum pipeline system with a huge volume, long maintenance time and high safety factor. For example, a pipeline of several hundred kilometers needs to be spliced ​​together by thousands of pipeline segments. There is aerodynamic heat in the pipeline, which causes axial deformation of the pipeline. If the segments are simply connected by flanges, under the action of temperature stress, the pipeline saddle will damage the anchor bolts connected to the foundation, etc., and eventually cause deformation of the pipeline, motor stator, etc., affecting the normal operation of the maglev train. Therefore, it is necessary to comprehensively consider the connection structure form and find a technical solution that can ensure that the pipeline can be freely expanded and contracted along the axis and that the sealing between the pipeline segments is reliable. Therefore, how to ensure that the vacuum maglev pipeline maintains a good working condition and sealing under long-term temperature expansion and deformation is a technical problem that urgently needs to be solved.

[0004] Therefore, in order to improve the deformation coordination ability of the vacuum maglev pipeline under the action of temperature and ensure the airtightness between the segments in the pipeline, a double-gap adjustable sealing telescopic structure between the beam segments of the vacuum maglev pipeline is provided. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art that there is a lack of solutions that can not only ensure the deformation coordination ability of the vacuum magnetic levitation pipeline under the action of temperature, but also ensure the airtightness between the segments inside the pipeline, and to provide a double-gap adjustable sealing telescopic structure between the beam segments of a vacuum magnetic levitation pipeline, which can meet the needs of future ultra-long distance transportation and actual line operation.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A double-gap adjustable sealed telescopic structure between vacuum maglev pipeline beam segments, comprising at least two pipe segments one and a control system, a pipe segment two is provided between two adjacent pipe segments one, all the pipe segments one and all the pipe segments two are used to set up a track beam segment, each pipe segment one has an enlarged pipe segment at the end, a corrugated expansion joint is connected between two adjacent enlarged pipe segments, the inner wall of each enlarged pipe segment is adapted to fit the corresponding end of the pipe segment two, a pushing component is provided between each end face of the pipe segment two and the corresponding end face of the adjacent pipe segment one, the control system controls the pushing component to push, and in an initial state, the spacing between two adjacent pipe segments one is greater than the length of the corresponding pipe segment two.

[0008] The double-gap adjustable sealed telescopic structure between the segments of the vacuum magnetic levitation pipeline beam of the present invention comprises at least two pipe segments 1, a pipe segment 2 is arranged between two adjacent pipe segments 1, all the pipe segments 1 and all the pipe segments 2 are used to form a vacuum pipeline beam, so as to be used to set a track beam segment, two adjacent enlarged pipe segments are respectively sleeved on both ends of the pipe segment 2, the inner wall of each enlarged pipe segment is adapted to be matched with the corresponding end of the outer wall of the pipe segment 2, so as to support the pipe segment 2, and at the same time facilitate the centering and positioning installation between the pipe segments, so as to ensure that the track beam segments correspondingly installed on each pipe segment can form a continuous track beam, and ensure smoothness, while It can also play a certain sealing effect. A corrugated expansion joint is connected between the two adjacent expanded pipe sections, which can adjust the expansion and contraction deformation according to the temperature deformation of the two adjacent pipe sections. It has good deformation ability, which can also play a role in sealing and preventing external dust from entering. A pushing component is provided between each end face of the pipe section two and the corresponding end face of the adjacent pipe section one. In the initial state, that is, after the initial installation is completed, the distance between the two adjacent pipe sections one is greater than the length of the corresponding pipe section two. The control system controls the pushing component to push to adjust the gap between the two end faces of the pipe section two and the end face of the corresponding pipe section one. The design requires that the gaps on both sides can be set to be consistent or inconsistent. During the operation stage, under the action of temperature difference, if there is a difference in the lengths of the two adjacent pipe sections, there will be differences in the temperature deformation requirements of the two pipe sections. An excessively large gap between the pipe section 2 and the pipe section 1 on one side will cause the running of the high-speed maglev train to be uneven and safety problems. The pushing component can push the pipe section 2 to move it to the center of the two adjacent pipe sections 1, so as to maintain the consistency of the gaps between the expansion joints on both sides, effectively ensure the smoothness of the high-speed maglev train in the vacuum pipe, increase the setting width of the expansion joint, and improve the safety of a single pipe section. The length is set. The use of this structure effectively solves the problem that the vacuum maglev pipeline is deformed under the action of temperature stress and affects the normal operation of the maglev train, and significantly increases the joint length of the vacuum pipeline. It is especially suitable for working conditions where the length difference between two adjacent pipe sections is large, and avoids the problem of inconsistent expansion joint width setting caused by inconsistent lengths of the pipe sections on both sides. It effectively solves the span adjustment problem of the vacuum maglev pipeline and ensures the air tightness in the vacuum pipeline at the same time, improves the operating safety of the high-speed maglev train in the vacuum pipeline, and ensures the stability of the vacuum pipeline maglev train. The structural construction difficulty is low, which is of great significance to the actual operation of the future vacuum maglev train.

[0009] Preferably, a groove is provided in the lower tube wall of the corresponding end of the first tube segment, the opening of the groove faces the corresponding second tube segment, and the pushing component is connected to the groove.

[0010] Preferably, the outer walls of the two ends of the pipe segment 2 are provided with bosses, the side surfaces of the bosses are used to adapt to the corresponding ends of the pipe segment 1, and the end surfaces of the bosses are used to adapt to the corresponding pushing components.

[0011] Further preferably, the boss is an annular structure.

[0012] The boss contacts the outer surface of pipe 2, which is convenient for alignment with the center line of pipe segment 1 on the left and right sides of pipe segment 2. At the same time, the end surface of the boss serves as the pushing surface of the pushing component, with a large contact area and stable pushing.

[0013] Preferably, a plurality of limiting components are connected between two adjacent pipe segments.

[0014] Further preferably, each of the limiting components includes a positioning hole, a connecting rod and a locking nut, the positioning holes are relatively arranged on two adjacent expanded pipe sections, a connecting rod is sleeved in the two relatively arranged positioning holes, and the locking nuts are provided at both ends of the connecting rod.

[0015] The positioning holes can slide along the connecting rod to adapt to the deformation of the pipe sections on both sides. The sliding distance is limited by the locking nuts on the outside of the two positioning holes to further ensure the stretching margin of the corrugated expansion joint and avoid damage by pulling.

[0016] Further preferably, a sealing layer is provided between the inner wall of each enlarged pipe segment and the corresponding outer wall of the second pipe segment.

[0017] Further preferably, the sealing layer comprises graphite packing.

[0018] The above-mentioned setting method is adopted to further ensure the sealing effect.

[0019] Preferably, the pushing component includes a jack.

[0020] Preferably, in the initial state, the sum of the gaps between the two end faces of the second pipe segment and the corresponding end face of the first pipe segment is less than or equal to 16 cm.

[0021] The above-mentioned setting method can avoid the excessive width of the single-side gap causing the gap between adjacent track beam sections to be too large, thereby affecting driving safety.

[0022] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The double-gap adjustable sealed telescopic structure between the vacuum maglev pipe beam segments of the present invention effectively solves the problem that the vacuum maglev pipe is deformed under the action of temperature stress and affects the normal operation of the maglev train, and significantly improves the joint length of the vacuum pipe. It is particularly suitable for working conditions where the length difference between two adjacent pipe sections is large, and avoids the problem of inconsistent expansion joint width settings caused by inconsistent spans of the pipe sections on both sides. It effectively solves the span adjustment problem of the vacuum maglev pipe, and at the same time ensures the airtightness in the vacuum pipe, improves the operating safety of the high-speed maglev train in the vacuum pipe, and ensures the stability of the vacuum pipe maglev train. The structural construction difficulty is low, which is of great significance to the actual operation of future vacuum maglev trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a double-gap adjustable sealing telescopic structure between vacuum magnetic levitation pipeline beam segments in Example 1;

[0025] Figure 2 for Figure 1 AA cross-section diagram;

[0026] Figure 3 for Figure 1 The cross-section of BB;

[0027] Figure 4 for Figure 1 Cross-sectional view of CC;

[0028] Figure 5 for Figure 1 Schematic diagram of the structure after deformation;

[0029] Figure 6 for Figure 5 Schematic diagram of the structure after adjustment by the push component.

[0030] Markings in the figure: 1-pipe segment one, 2-pipe segment two, 11-enlarged pipe section, 3-corrugated expansion joint, 4-boss, 51-positioning hole, 52-connecting rod, 6-sealing layer, 7-thrust component. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0032] Example 1

[0033] like Figure 1-4 As shown, the double-gap adjustable sealing telescopic structure between the vacuum magnetic levitation pipeline beam segments of the present invention comprises at least two pipe segments 1, Figure 1Only two of the pipe sections 1 are shown, and a pipe section 2 is provided between two adjacent pipe sections 1. In this embodiment, the anti-collision blocks 21 are provided at both end surfaces of the pipe section 2. All of the pipe sections 1 and all of the pipe sections 2 are used to form a vacuum pipe beam. All of the pipe sections 1 and all of the pipe sections 2 are used to set a track beam section. Each end of the pipe section 1 has an enlarged pipe section 11, and the enlarged pipe section 11 can be as shown in FIG. Figure 1 The gradually expanding pipe section shown in the figure can also be a straight pipe section with a larger diameter connected to the end face of the pipe section 1. A stiffening rib is connected between the straight pipe section and the corresponding pipe section 1. The pipe section 1 and the corresponding straight pipe section are an integrally formed component. A corrugated expansion joint 3 is connected between two adjacent expanded pipe sections 11, which can adjust the expansion and contraction deformation according to the temperature deformation of the two adjacent pipe sections 1, and has good deformation ability. This can also play a role in sealing and preventing external dust from entering. The corrugated expansion joint 3 is arranged on the outside of the pipe section 2, and the inner wall of each expanded pipe section 11 is It is adapted to fit the corresponding ends of the pipe segment 2, that is, the two adjacent expanded pipe sections 11 are respectively sleeved on the two ends of the pipe segment 2, and the pipe segment 2 is supported by the two pipe segments 1 on both sides, ensuring that the corresponding track beam sections installed on each pipe segment can form a continuous track beam, ensuring smoothness, and also having a certain sealing effect. Preferably, the outer walls of the two ends of the pipe segment 2 are provided with bosses 4, and the bosses 4 are annular structures. The bosses 4 are in contact with the outer surface of the corresponding pipe segment 1, so as to facilitate alignment with the center line of the pipe segment 1 on the left and right sides of the pipe segment 2.

[0034] A sealing layer 6 is provided between the inner wall of each enlarged pipe section 11 and the outer wall of the corresponding pipe section 2 2 , and the sealing layer 6 comprises a graphite packing filler, such as a dense crystalline graphite packing, a flaky graphite packing, or an cryptocrystalline graphite packing. Two adjacent enlarged pipe sections 11 and the sealing layer 6 on the outer wall of the corresponding pipe section 2 2 are connected as a whole, thereby effectively ensuring the sealing effect.

[0035] A pushing component 7 is provided between each end face of the pipe segment 2 and the corresponding end face of the adjacent pipe segment 1. Preferably, the pushing component 7 is connected to the pipe segment 1, and a groove is provided in the lower pipe wall of the corresponding end of the pipe segment 1. The opening of the groove faces the corresponding pipe segment 2. The pushing component 7 is connected to the groove. The pushing component 7 includes a jack, an oil pump and an oil cylinder. The control system controls the oil pump to drive the jack to extend or retract.

[0036] Preferably, a plurality of limiting components are connected between two adjacent pipe segments 1. For example, six limiting components are provided in the present embodiment. All the limiting components are evenly distributed along the circumference of the outer wall of the pipe segment 1. Each of the limiting components comprises a positioning hole 51, a connecting rod 52 and a locking nut. The positioning holes 51 are relatively arranged on the two adjacent expanded pipe segments 11. A connecting rod 52 is sleeved in the two relatively arranged positioning holes 51. The two ends of the connecting rod 52 are provided with locking nuts. The positioning holes 51 can slide along the connecting rod 52 to adapt to the deformation of the pipe segments 1 on both sides. The sliding distance is limited by the locking nuts on the outer sides of the two positioning holes 51, thereby further ensuring the stretching margin of the corrugated expansion joint 3 to avoid damage to the vacuum environment caused by pulling, and at the same time, it is beneficial to the deformation coordination of the entire vacuum magnetic levitation pipeline beam.

[0037] After the initial installation, the spacing between two adjacent pipe segments 1 is greater than the length of the corresponding pipe segment 2, and the sum of the gaps between the two end faces of the pipe segment 2 and the corresponding end face of the corresponding pipe segment 1 is less than or equal to 16 cm, that is, the sum of the gap width between the left end face of the pipe segment 2 and the left end face of the pipe segment 1 and the gap width between the right end face of the pipe segment 2 and the right end face of the pipe segment 1 is less than or equal to 16 cm. The left gap width and the right gap width are designed through full-bridge finite element analysis based on actual parameters such as pipeline diameter, pipeline span, temperature load, etc. The control system controls the pushing components 7 on both sides to set the gap width on the left and right sides of the pipe segment 2 as required by the design, effectively ensuring the deformation space of the pipe segments 1 on both sides during operation. After the adjustment is completed, the pushing components 7 retract into the groove to leave deformation space.

[0038] As the temperature effect, the pipe segments 1 on both sides deform to different degrees. According to the distances between the left and right pipe segments 1 and pipe segment 2 at this time, the moving direction and distance of the pipe segment 2 2 when the pipe segment 2 2 is located in the central position are obtained. For deformation conditions, see Figure 5 After manually judging the moving direction and distance of the pipe section 2, the control system controls the pushing component 7 on the right to push outward, and the pushing component 7 on the left is used to limit the position, so that the pipe section 2 is located in the middle of the adjacent pipe section 1, and the gap width on both sides is kept consistent. The sensor can also be set to identify whether the left and right gap widths are consistent (an error range can be set). When the error range is exceeded, the control system controls the pushing component 7 to automatically push, ensuring that the spacing between the left and right sides is consistent. After adjustment, Figure 6 shown.

[0039] The adoption of this structure effectively solves the problem that the normal operation of the maglev train is affected by the deformation of the vacuum maglev pipeline under the action of temperature stress, and significantly increases the connection distance of the vacuum pipeline. It is particularly suitable for working conditions where the length difference between two adjacent pipe sections is large, and avoids the problem of inconsistent expansion joint width settings caused by inconsistent spans of the pipe sections on both sides. It effectively solves the span adjustment problem of the vacuum maglev pipeline, and at the same time ensures the air tightness in the vacuum pipeline, improves the operating safety of the high-speed maglev train in the vacuum pipeline, and ensures the stability of the vacuum pipeline maglev train. The structural construction difficulty is low, which is of great significance to the actual operation of future vacuum maglev trains.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The double-gap adjustable sealing telescopic structure between the vacuum magnetic levitation pipeline beam segments is characterized by: The invention comprises at least two pipe sections (1) and a control system, wherein a pipe section (2) is arranged between two adjacent pipe sections (1), and all the pipe sections (1) and all the pipe sections (2) are used to set a track beam section. The end of each pipe section (1) is provided with an enlarged pipe section (11), and a corrugated expansion joint (3) is connected between two adjacent enlarged pipe sections (11). The inner wall of each enlarged pipe section (11) is adapted to fit the corresponding end of the pipe section (2), and a pushing component (7) is arranged between each end face of the pipe section (2) and the corresponding end face of the adjacent pipe section (1). The control system controls the pushing component (7) to push. In an initial state, the distance between two adjacent pipe sections (1) is greater than the length of the corresponding pipe section (2). A groove is provided in the lower pipe wall of the corresponding end of the pipe section (1). The opening of the groove faces the corresponding pipe section (2). The pushing component (7) is connected to the groove. The outer walls of the two ends of the pipe section (2) are provided with bosses (4). The side surfaces of the bosses (4) are used to adapt to the corresponding ends of the pipe section (1). The end surfaces of the bosses (4) are used to adapt to the corresponding pushing components (7).

2. The sealing telescopic structure according to claim 1, characterized in that: The boss (4) is an annular structure.

3. The sealing telescopic structure according to claim 1, characterized in that: A plurality of limiting components are connected between two adjacent pipe sections 1 (1).

4. The sealing telescopic structure according to claim 3, characterized in that: Each of the limiting components comprises a positioning hole (51), a connecting rod (52) and a locking nut. The positioning holes (51) are relatively arranged on two adjacent enlarged pipe sections (11). A connecting rod (52) is sleeved in the two relatively arranged positioning holes (51). Both ends of the connecting rod (52) are provided with the locking nuts.

5. The sealing telescopic structure according to claim 1, characterized in that: A sealing layer (6) is provided between the inner wall of each enlarged pipe section (11) and the outer wall of the corresponding pipe section 2 (2).

6. The sealing telescopic structure according to claim 5, characterized in that: The sealing layer (6) comprises graphite packing.

7. The sealing telescopic structure according to any one of claims 1 to 6, characterized in that: The pushing component (7) comprises a jack.

8. The sealing telescopic structure according to any one of claims 1 to 6, characterized in that: In the initial state, the sum of the gaps between the two end faces of the pipe segment 2 (2) and the corresponding end face of the pipe segment 1 (1) is less than or equal to 16 cm.

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