CN110758410A - Double-gap adjustable sealing telescopic structure between vacuum magnetic suspension pipeline beam sections - Google Patents
Double-gap adjustable sealing telescopic structure between vacuum magnetic suspension pipeline beam sections Download PDFInfo
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- CN110758410A CN110758410A CN201911204417.9A CN201911204417A CN110758410A CN 110758410 A CN110758410 A CN 110758410A CN 201911204417 A CN201911204417 A CN 201911204417A CN 110758410 A CN110758410 A CN 110758410A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/10—Tunnel systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L13/00—Electric propulsion for monorail vehicles, suspension vehicles or rack railways; Magnetic suspension or levitation for vehicles
- B60L13/04—Magnetic suspension or levitation for vehicles
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Abstract
The invention relates to the technical field of vacuum high-speed maglev traffic, in particular to a double-gap adjustable sealing telescopic structure between beam sections of a vacuum maglev pipeline, which effectively solves the problem that the normal operation of a maglev train is influenced by the deformation of the pipeline of the vacuum maglev pipeline under the action of temperature stress, obviously improves the connection distance of the vacuum pipeline, is particularly suitable for the working condition with larger length difference of two adjacent pipe sections I, avoids the problem of inconsistent expansion joint width arrangement caused by inconsistent span of the pipe sections at two sides, effectively solves the problem of span adjustment of the vacuum maglev pipeline, ensures the air tightness in the vacuum pipeline, improves the operation safety of the high-speed maglev train in the vacuum pipeline, ensures the stability of the vacuum pipeline maglev train, has low structural construction difficulty and has great significance for the actual operation of the vacuum maglev train in the future.
Description
Technical Field
The invention relates to the technical field of vacuum high-speed magnetic suspension traffic, in particular to a double-gap adjustable sealing telescopic structure between vacuum magnetic suspension pipeline beam sections.
Background
The vacuum high-speed magnetic levitation transportation technology is a technology formed by combining a vacuum pipeline and a magnetic levitation technology, and the speed can reach 600-1000 km/h due to the fact that the restrictions of air resistance, noise, wheel-rail adhesion and the like are broken through, and the speed blank space between high-speed rails and air transportation is filled; with the breakthrough of high-power traction driving technology, the speed can reach 1000km/h and above, even supersonic speed or higher speed than sonic speed, and the method becomes a long-distance urban or ultra-long distance intercontinental transportation mode for compensating or replacing aviation in the future.
The first difficulty of the vacuum pipeline transportation technology is how to provide a vacuum pipeline system with huge volume, long retention time and high safety factor, for example, hundreds of kilometers of pipelines, thousands of pipeline segments need to be spliced together, and aerodynamic heat exists in the pipelines, so that the pipelines have axial deformation, if the rigid connection of flanges and flanges is adopted between the segments, under the action of temperature stress, the pipeline saddle will damage foundation bolts and the like connected with a foundation, and finally the pipelines, a motor stator and the like deform, and the normal operation of a maglev train is influenced, so that the problem of the form of a connecting structure must be comprehensively considered, and a technical scheme which can ensure that the pipelines can freely stretch along the axis and can also ensure the reliable sealing between the pipeline segments is found. Therefore, how to ensure that the vacuum magnetic suspension pipeline keeps good working state and sealing performance under long-term temperature expansion and contraction deformation is a technical problem which is urgently needed to be solved at present.
Therefore, in order to improve the deformation coordination capacity of the vacuum magnetic suspension pipeline under the action of temperature and ensure the air tightness between sections in the pipeline, the double-gap adjustable sealing telescopic structure between the sections of the vacuum magnetic suspension pipeline beam is provided.
Disclosure of Invention
The invention aims to overcome the defects of the prior art that the deformation coordination capability of a vacuum magnetic suspension pipeline under the action of temperature and the air tightness between sections in the pipeline are not guaranteed, and provides a double-gap adjustable sealing telescopic structure between sections of a vacuum magnetic suspension pipeline beam, which can meet the requirements of future ultra-long distance transportation and actual line operation.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a sealed extending structure with adjustable two clearances between vacuum magnetic levitation pipeline beam segment contains two at least pipe joints one and control system, adjacent two be equipped with pipe joint two, all between the pipe joint one pipe joint two all are used for setting up track beam segment, every the tip of pipe joint one has the expansion pipe section, adjacent two be connected with the wave form expansion joint between the expansion pipe section, every the inner wall adaptation of expansion pipe section cup joints the corresponding tip of pipe joint two, every terminal surface of pipe joint two with adjacent be equipped with between the corresponding terminal surface of pipe joint one and push away the part, control system control push away the part top and push away, under the initial condition, adjacent two interval between the pipe joint one is greater than and corresponds the length of pipe joint two.
The double-gap adjustable sealing telescopic structure between the vacuum magnetic suspension pipeline beam sections comprises at least two pipe sections I, a pipe section II is arranged between every two adjacent pipe sections I, all the pipe sections I and all the pipe sections II are used for forming a vacuum pipeline beam and are used for arranging a track beam section, every two adjacent expanding pipe sections are respectively sleeved at two ends of the pipe sections II, the inner wall of each expanding pipe section is in fit and sleeve joint with the corresponding end part of the outer wall of the pipe section II and is used for supporting the pipe sections II and simultaneously facilitating the centering and positioning installation among the pipe sections, the track beam section correspondingly installed on each pipe section can form a continuous track beam, the smoothness is ensured, a certain sealing effect can be achieved simultaneously, a waveform expansion joint is connected between every two adjacent expanding pipe sections, and the telescopic deformation adjustment can be carried out according to the temperature deformation of the two adjacent pipe sections I, the deformation capacity is good, the sealing and external dust preventing effects can be achieved, a pushing component is arranged between each end face of the second pipe joint and the corresponding end face of the adjacent first pipe joint, in an initial state, namely after the initial installation is finished, the distance between the two adjacent first pipe joints is larger than the length corresponding to the second pipe joint, the control system controls the pushing component to push so as to adjust the gaps between the two end faces of the second pipe joint and the end faces corresponding to the first pipe joints, the gaps on the two sides can be set to be consistent or inconsistent according to design requirements, in an operation stage, under the action of temperature difference, when the lengths of the two adjacent first pipe joints are different, the temperature deformation requirements of the two first pipe joints are different, and the operating irregularity and safety problems of the high-speed magnetic suspension train can be caused by the excessive gap between the second pipe joint and the first pipe joint on one side, the pushing component can push the second pipe joint to move to the center of the first pipe joint so as to keep the consistency of the gap between the expansion joints at two sides, effectively ensure the smoothness of the high-speed maglev train in the vacuum pipeline, increase the arrangement width of the expansion joints and improve the arrangement length of the single first pipe joint, by adopting the structure, the problem that the normal running of the maglev train is influenced by the deformation of the pipeline under the action of temperature stress of the vacuum maglev pipeline is effectively solved, the connection distance of the vacuum pipeline is obviously improved, the pushing component is particularly suitable for the working condition that the length difference of the two adjacent first pipe joints is larger, the problem that the arrangement width of the expansion joints is inconsistent due to the inconsistent length of the first pipe joints at two sides is avoided, the span adjusting problem of the vacuum maglev pipeline is effectively solved, meanwhile, the air tightness in the vacuum pipeline is ensured, the running safety of the high-speed maglev train in the vacuum pipeline is improved, the structure construction difficulty is low, and the method has great significance for the actual operation of the future vacuum maglev train.
Preferably, a groove is formed in the lower pipe wall of the end part corresponding to the first pipe joint, the opening of the groove faces the corresponding second pipe joint, and the pushing component is connected into the groove.
Preferably, bosses are arranged on the outer walls of the two end parts of the second pipe joint, the side surfaces of the bosses are used for being in fit connection with the corresponding end parts of the first pipe joint, and the end surfaces of the bosses are used for being in fit connection with the corresponding pushing parts.
Further preferably, the boss is of an annular structure.
The boss is in contact with the outer surface of the second pipeline, so that the boss is conveniently aligned with the central line of the first pipeline on the left side and the right side of the second pipeline, meanwhile, the end face of the boss serves as the pushing face of the pushing component, the contact area is large, and pushing is stable.
Preferably, a plurality of limiting parts are connected between every two adjacent pipe sections I.
Preferably, each limiting part comprises a positioning hole, a connecting rod and a locking nut, the positioning holes are oppositely arranged on two adjacent expanding pipe sections, one connecting rod is sleeved in each two oppositely arranged positioning holes, and the locking nuts are arranged at two ends of each connecting rod.
The positioning holes can slide along the connecting rods so as to adapt to deformation of the pipe joints I on two sides, the sliding distance is limited through the locking nuts on the outer sides of the two positioning holes, the stretching allowance of the waveform expansion joint is further guaranteed, and pulling damage is avoided.
Further preferably, a sealing layer is arranged between the inner wall of each enlarged pipe section and the corresponding second outer wall of the pipe section.
Further preferably, the sealing layer contains graphite packing.
By adopting the arrangement mode, the sealing effect is further ensured.
Preferably, the pushing member comprises a jack.
Preferably, in an initial state, the sum of the gaps between the two end surfaces of the second pipe joint and the corresponding end surface of the first pipe joint is less than or equal to 16 cm.
By adopting the arrangement mode, the phenomenon that the gap between adjacent track beam sections is too large due to too large width of the unilateral gap is avoided, and the driving safety is further influenced.
In summary, compared with the prior art, the invention has the beneficial effects that:
1. by adopting the double-gap adjustable sealing telescopic structure between the beam sections of the vacuum magnetic suspension pipeline, the problem that the normal operation of a magnetic suspension train is influenced by the deformation of the pipeline under the action of temperature stress of the vacuum magnetic suspension pipeline is effectively solved, the connection distance of the vacuum pipeline is obviously improved, the double-gap adjustable sealing telescopic structure is particularly suitable for the working condition that the length difference of two adjacent pipe sections I is large, the problem that the widths of expansion joints are not consistent due to the inconsistent span of the pipe sections at two sides is avoided, the span adjusting problem of the vacuum magnetic suspension pipeline is effectively solved, the air tightness in the vacuum pipeline is ensured, the operation safety of a high-speed magnetic suspension train in the vacuum pipeline is improved, the stability of the vacuum magnetic suspension train in the vacuum pipeline is ensured, the structural construction difficulty is low, and the double-gap adjustable sealing telescopic structure has great significance for.
Description of the drawings:
fig. 1 is a schematic structural view of a double-gap adjustable sealing telescopic structure between vacuum magnetic suspension pipeline beam sections in embodiment 1;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view of C-C of FIG. 1;
FIG. 5 is a schematic view of the deformed configuration of FIG. 1;
fig. 6 is a schematic view of the structure of fig. 5 after adjustment by the pushing member.
The labels in the figure are: 1-pipe joint I, 2-pipe joint II, 11-expanded pipe section, 3-waveform expansion joint, 4-boss, 51-positioning hole, 52-connecting rod, 6-sealing layer and 7-pushing component.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-4, the double-gap adjustable sealed telescopic structure between vacuum magnetic suspension pipeline beam sections according to the present invention includes at least two pipe sections one 1, fig. 1 only shows two pipe sections one 1, and a pipe section two 2 is disposed between two adjacent pipe sections one 1, in this embodiment, the anti-collision blocks 21 are disposed on two end surfaces of the pipe section two 2, all the pipe sections one 1 and all the pipe sections two 2 are used to form a vacuum pipeline beam, all the pipe sections one 1 and all the pipe sections two 2 are used to set a track beam section, an end of each pipe section one 1 has an enlarged pipe section 11, the enlarged pipe section 11 may be a gradually enlarged pipe section as shown in fig. 1, or a straight pipe section with a larger diameter connected to an end surface of the pipe section one 1, a stiffening rib is connected between the straight pipe section one 1 and the corresponding straight pipe section one 1, and the straight pipe section one 1 are integrally formed components, the corrugated expansion joint 3 is connected between two adjacent expansion pipe sections 11, the corrugated expansion joint 3 can be adjusted in a telescopic deformation manner according to the temperature deformation of the two adjacent pipe sections 1, the deformation capability is good, the corrugated expansion joint can also play a role in sealing and preventing external dust from entering, the corrugated expansion joint 3 is arranged on the outer side of the pipe section 2, the inner wall of each expansion pipe section 11 is used for being matched and sleeved with the corresponding end part of the pipe section 2, namely the two adjacent expansion pipe sections 11 are respectively sleeved at the two ends of the pipe section 2, the pipe section 2 is supported by the two pipe sections 1 at the two sides, the rail beam sections correspondingly mounted on each pipe section can form a continuous rail beam, the smoothness is ensured, a certain sealing effect can be achieved, preferably, the outer walls at the two ends of the pipe section 2 are provided with bosses 4, and the bosses 4 are of annular structures, the boss 4 is in contact with the outer surface of the corresponding pipe joint I1, and is convenient to be aligned with the center lines of the pipe joints I1 on the left side and the right side of the pipe joint II 2.
Every 11 inner walls of expansion pipe section and corresponding have sealing layer 6 between the two 2 outer walls of tube coupling, sealing layer 6 contains graphite packing filler, like fine and close crystalline form graphite packing, scale graphite packing, cryptocrystalline graphite packing, adjacent two expansion pipe section 11 with correspond the whole setting is even become to sealing layer 6 of two 2 outer walls of tube coupling, effectively guarantees sealed effect.
Every terminal surface of pipe section two 2 with adjacent be equipped with between the corresponding terminal surface of pipe section one 1 and push away parts 7, preferred, push away parts 7 connect in pipe section one 1 is last, be equipped with the recess in the lower part pipe wall of pipe section one 1 corresponding tip, the opening orientation of recess corresponds pipe section two 2, push away parts 7 connect in the recess, push away parts 7 contains jack, oil pump and hydro-cylinder, control system control the oil pump drive the jack is stretched out or is shrunk.
Preferably, a plurality of limiting parts are connected between two adjacent pipe sections 1, for example, 6 limiting parts are provided in this embodiment, all the limiting parts are uniformly distributed along the circumferential direction of the outer wall of the pipe section 1, each limiting part comprises a positioning hole 51, a connecting rod 52 and a locking nut, the positioning holes 51 are oppositely arranged on two adjacent expanded pipe sections 11, one connecting rod 52 is sleeved in the two positioning holes 51 which are oppositely arranged, the locking nuts are arranged at two ends of the connecting rod 52, the positioning holes 51 can slide along the connecting rod 52 so as to adapt to the deformation of the pipe joints 1 at two sides, the sliding distance is limited by the two locking nuts outside the positioning holes 51, so that the stretching allowance of the waveform expansion joint 3 is further ensured, the damage of the vacuum environment caused by the pulling damage is avoided, and the deformation coordination of the whole vacuum magnetic suspension pipeline beam is facilitated.
After initial installation, the distance between two adjacent pipe joints I1 is greater than the length corresponding to the pipe joint II 2, the sum of the gaps between the two end faces of the pipe joint II 2 and the corresponding end faces corresponding to the pipe joint I1 is less than or equal to 16cm, namely the sum of the gap width between the left end face of the pipe joint II 2 and the left end face of the pipe joint I1 and the gap width between the right end face of the pipe joint II 2 and the right end face of the pipe joint I1 is less than or equal to 16cm, the actual parameters such as the pipe diameter, the pipe span, the temperature load and the like according to the left gap width and the right gap width are designed through finite element full bridge analysis, the pushing parts 7 on the two sides are controlled by the control system to enable the gap widths on the left side and the right side of the pipe joint II 2 to be set as the design requirements, the deformation space of the pipe joints I1 on the two sides in the operation process is effectively ensured, and the pushing parts, leaving a space for deformation.
Along with the temperature effect, the pipe joints 1 on the two sides deform to different degrees, the moving direction and distance of the pipe joint 2 when the pipe joint 2 is located at the central position are obtained according to the distance between the left pipe joint 1 and the right pipe joint 2 and the pipe joint 2, if the deformation condition is shown in fig. 5, after the moving direction and distance of the pipe joint 2 are judged manually, the control system controls the right pushing component 7 to push outwards, the left pushing component 7 is used for limiting, so that the pipe joint 2 is located in the middle of the adjacent pipe joints 1, the two sides are kept to have consistent gap width, whether the left gap width and the right gap width are consistent or not can be identified by arranging a sensor (an error range can be set), when the error range is exceeded, the control system controls the pushing component 7 to automatically push, and the distance between the left side and the right side is guaranteed to be consistent, after adjustment as shown in fig. 6.
Adopt this structure to effectively solve vacuum magnetic levitation pipeline under the temperature stress effect, the problem that the pipeline warp and influence maglev train normal operating, the antithetical couplet long distance that has showing and improved vacuum pipeline, be particularly useful for the great operating mode of the length difference of two adjacent pipe joints one, the expansion joint width that has avoided inconsistent arouses of two side pipe joints one span sets up inconsistent problem, effectively solve vacuum magnetic levitation pipeline and transfer the problem of striding, guarantee the gas tightness in the vacuum pipeline simultaneously, improve the operation safety of high-speed maglev train in vacuum pipeline, guarantee vacuum pipeline maglev train's stationarity, the structure construction degree of difficulty is low, it is significant to the actual operation of following vacuum maglev train.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The double-gap adjustable sealing telescopic structure between the vacuum magnetic suspension pipeline beam sections is characterized by comprising at least two pipe sections I (1) and a control system, wherein a pipe section II (2) is arranged between every two adjacent pipe sections I (1), all the pipe sections I (1) and all the pipe sections II (2) are all used for arranging the track beam sections, the end part of each pipe section I (1) is provided with an expansion pipe section (11), a waveform expansion joint (3) is connected between every two adjacent expansion pipe sections (11), the inner wall of each expansion pipe section (11) is in adaptive socket joint with the corresponding end part of the pipe section II (2), a pushing component (7) is arranged between each end face of the second pipe joint (2) and the corresponding end face of the adjacent first pipe joint (1), the control system controls the pushing component (7) to push, and in an initial state, the distance between every two adjacent pipe joints I (1) is larger than the length of the corresponding pipe joint II (2).
2. The sealed telescopic structure according to claim 1, characterized in that a groove is arranged in the lower pipe wall of the corresponding end of the first pipe section (1), the opening of the groove faces the corresponding second pipe section (2), and the pushing component (7) is connected in the groove.
3. The sealed telescopic structure according to claim 1, wherein the outer walls of the two end parts of the second pipe section (2) are provided with bosses (4), the side surfaces of the bosses (4) are used for being matched and sleeved with the corresponding end parts of the first pipe section (1), and the end surfaces of the bosses (4) are used for being matched with the corresponding pushing parts (7).
4. A seal expansion structure according to claim 3, characterized in that the boss (4) is of annular configuration.
5. The sealed telescopic structure according to claim 1, characterized in that a plurality of limiting parts are connected between two adjacent pipe sections I (1).
6. The seal extension structure according to claim 5, wherein each of the position limiting members comprises a positioning hole (51), a connecting rod (52) and a lock nut, the positioning holes (51) are oppositely arranged on two adjacent expanding pipe sections (11), one connecting rod (52) is sleeved in the two oppositely arranged positioning holes (51), and the lock nuts are arranged at two ends of the connecting rod (52).
7. The sealed 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 second pipe section (2).
8. The seal extension structure according to claim 7, characterized in that the seal layer (6) contains graphite packing.
9. Sealed telescopic structure according to any of claims 1 to 8, characterized in that said pushing member (7) comprises a jack.
10. The sealed telescopic structure according to any one of claims 1 to 8, wherein in an initial state, the sum of gaps between two end faces of the second pipe section (2) and the corresponding end face of the corresponding first pipe section (1) is less than or equal to 16 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204417.9A CN110758410A (en) | 2019-11-29 | 2019-11-29 | Double-gap adjustable sealing telescopic structure between vacuum magnetic suspension pipeline beam sections |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204417.9A CN110758410A (en) | 2019-11-29 | 2019-11-29 | Double-gap adjustable sealing telescopic structure between vacuum magnetic suspension pipeline beam sections |
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| CN201911204417.9A Pending CN110758410A (en) | 2019-11-29 | 2019-11-29 | Double-gap adjustable sealing telescopic structure between vacuum magnetic suspension pipeline beam sections |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114789737A (en) * | 2022-04-28 | 2022-07-26 | 中铁第四勘察设计院集团有限公司 | Vacuum magnetic suspension pipeline structure |
| WO2022156092A1 (en) * | 2021-01-19 | 2022-07-28 | 西京学院 | Pre-tension seabed vacuum pipeline structure and stretching method therefor |
| CN115027510A (en) * | 2022-07-13 | 2022-09-09 | 中铁第四勘察设计院集团有限公司 | Low vacuum pipeline structure with temperature keeping function |
-
2019
- 2019-11-29 CN CN201911204417.9A patent/CN110758410A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156092A1 (en) * | 2021-01-19 | 2022-07-28 | 西京学院 | Pre-tension seabed vacuum pipeline structure and stretching method therefor |
| CN114789737A (en) * | 2022-04-28 | 2022-07-26 | 中铁第四勘察设计院集团有限公司 | Vacuum magnetic suspension pipeline structure |
| CN114789737B (en) * | 2022-04-28 | 2023-06-27 | 中铁第四勘察设计院集团有限公司 | Vacuum magnetic levitation pipeline structure |
| CN115027510A (en) * | 2022-07-13 | 2022-09-09 | 中铁第四勘察设计院集团有限公司 | Low vacuum pipeline structure with temperature keeping function |
| CN115027510B (en) * | 2022-07-13 | 2023-07-04 | 中铁第四勘察设计院集团有限公司 | Low vacuum pipeline structure with temperature keeping function |
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