Low-vacuum tunnel for high-speed train connection and operation method thereof

Abstract

The present application relates to a kind of low vacuum tunnel super high-speed train connecting passageway system and its operating method, the system includes the telescopic passageway of lateral arrangement, located in low vacuum tunnel and is connected between the station door of air-tight type super high-speed train and tunnel lining, including several sections of nested Z-shaped telescopic shell, vertical profile gradually increases from inside to outside.The telescopic passageway in the present application can be hidden in the thickness range of low vacuum tunnel lining in compressed state, can be connected between train door and tunnel lining station door in stretched state, operates by magnetic attraction principle, as the telescopic three-dimensional shell structure system, with reliable air-tightness measures, while having certain overall rigidity, toughness and stability when fully stretched, does not need to repeatedly inflate and pump during operation Low vacuum tunnel, effectively control energy consumption, reduce operating cost, also fundamentally avoid the security risks caused by the repeated change of air pressure in low vacuum tunnel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-vacuum tunnel magnetic levitation transportation technology, in particular to a low-vacuum tunnel super-high-speed train connecting passage system and a running method thereof. BACKGROUND

[0002] With the development of rail transportation in the direction of higher speed and lower energy consumption, the concept of super-high-speed magnetic levitation train based on low-vacuum environment has entered the experimental stage from the theoretical stage. Today, with the maturation of the theory and practical experience of low-vacuum tube (or tunnel) super-high-speed train construction, to ensure the completion of the super-high-speed magnetic levitation train, the problem of passenger safety boarding and alighting must be solved. Since the inside of the tube (or tunnel) around the train is a low-vacuum environment, which is obviously different from the atmospheric pressure environment inside the train and outside the tube (or tunnel), how to establish an airtight passenger passage connected with the super-high-speed train while ensuring that the low-vacuum environment in the tube (or tunnel) is basically not affected is one of the major technical problems of common concern in the industry.

[0003] However, the current super-high-speed train passenger passage technical solution is mainly based on a non-airtight scheme, that is, when passengers board and alight, the low-vacuum tube (or tunnel) needs to be restored to a normal atmospheric pressure state, and the tube (or tunnel) is vacuumed again after the passengers have finished boarding and alighting, which is a cycle of repeated inflation and vacuumization of the tube (or tunnel). This not only greatly increases energy consumption and operating costs, but also causes great safety hazards to the tube (or tunnel) body and internal equipment during repeated inflation and vacuumization of the tube (or tunnel), which cannot meet the construction needs of green low-carbon super-high-speed trains and the basic goal of safe operation for a hundred years.

[0004] Therefore, it is necessary to propose new airtight passenger passage technical measures to overcome the above-mentioned defects, on the one hand to meet the airtightness requirements of the passage, and on the other hand to meet the safety and stability requirements of the passage when the train is running at super-high speed. SUMMARY

[0005] The purpose of the present application is to provide a low-vacuum tunnel super-high-speed train connecting passage system and a running method thereof, to solve the non-airtightness problem of the existing passenger passage, the high energy consumption problem of repeated inflation and vacuumization of the low-vacuum tunnel, and the safety hazard problem caused thereby.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] A low-vacuum tunnel super-high-speed train connecting passage system is provided, which comprises a transversely arranged telescopic passage, the telescopic passage being located in a low-vacuum tunnel and being connected between a train door of an airtight super-high-speed train and a platform door provided on a tunnel lining;

[0008] The telescopic channel comprises several Z-shaped telescopic shells nested in sequence, and the vertical profile of the Z-shaped telescopic shell gradually increases from inside to outside.

[0009] Further, the Z-shaped telescopic shell comprises an end ring plate, a shell cylinder and a magnetic block ring.

[0010] The end ring plate is located at the inner end of the shell cylinder and is fixed inside the shell cylinder.

[0011] The magnetic block ring is located at the outer end of the shell cylinder and is fixed outside the shell cylinder.

[0012] Further, the inner side of the telescopic channel is provided with a U-shaped telescopic shell, which is nested with the innermost Z-shaped telescopic shell.

[0013] The U-shaped telescopic shell comprises a shell cylinder and two magnetic block rings.

[0014] The two magnetic block rings are respectively located at the inner and outer ends of the shell cylinder and outside the shell cylinder.

[0015] Further, the outer side of the telescopic channel is provided with an L-shaped telescopic shell, which is nested with the outermost Z-shaped telescopic shell.

[0016] The L-shaped telescopic shell comprises an end ring plate and a shell cylinder.

[0017] The end ring plate is located at the inner end of the shell cylinder and is fixed inside the shell cylinder.

[0018] Further, the inner circular end face of the end ring plate is provided with a circular groove, and the circular groove is provided with a ball.

[0019] The outer circular end face of the magnetic block ring is provided with a circular groove, and the circular groove is provided with a ball.

[0020] Further, the outer periphery of the air-tight super high-speed train is provided with a magnetic attraction groove matched with the profile of the U-shaped telescopic shell.

[0021] After the telescopic channel is elongated from outside to inside, the magnetic block ring of the U-shaped telescopic shell is attracted into the magnetic attraction groove, thereby connecting the telescopic channel with the air-tight super high-speed train.

[0022] Further, the outer side of the tunnel lining is provided with a pre-embedded L-shaped steel plate, and the outer end of the shell cylinder of the L-shaped telescopic shell is fixed to the pre-embedded L-shaped steel plate.

[0023] Further, after the telescopic channel is contracted outwardly, it is located in the thickness range of the tunnel lining, and the inner side of the tunnel lining is provided with a door seal.

[0024] Furthermore, the system further comprises an upper air cushion and a lower air cushion;

[0025] The upper air cushion is located at the bottom of the telescopic channel;

[0026] The lower air cushion is located at the bottom outside the telescopic channel.

[0027] In another aspect, a method for operating the low vacuum tunnel ultra-high-speed train connection channel system is provided, the method comprising:

[0028] After the airtight super-high-speed train arrives at the station, the sealed door opens;

[0029] The lower air cushion is inflated;

[0030] The magnetic groove emits electromagnetic waves to attract the magnetic ring of the telescopic channel, and the telescopic channel extends inward. The magnetic ring at the rear end of the previous telescopic shell is clamped and limited by the end ring plate at the front end of the next telescopic shell, and finally nested in place;

[0031] The magnetic ring at the front end is sucked into the magnetic groove, and the telescopic channel is sealed;

[0032] The upper air cushion is inflated to form a smooth passage for passengers to walk on;

[0033] The platform door is opened first, then the train door, and passengers begin to get on and off the train;

[0034] After the passengers have boarded and left the bus, the bus door is closed first, then the platform door, and the upper air cushion is deflated and recovered;

[0035] The magnetic groove emits reverse electromagnetic waves to repel the magnetic ring of the telescopic channel, causing the telescopic channel to shrink outward and return to the thickness range of the tunnel lining;

[0036] The lower air cushion is deflated and recovered, and the door is closed;

[0037] The airtight ultra-high-speed train starts.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention provides a low-vacuum tunnel connection channel system for ultra-high-speed trains and its operating method. As a reliable, retractable three-dimensional shell structure, it not only provides reliable airtightness protection, but also exhibits a certain degree of overall rigidity, toughness, and stability along the channel direction when fully extended. When fully retracted, it can be hidden within the thickness of the tunnel lining, minimizing the adverse effects of wind pressure and high temperature associated with ultra-high-speed train operation. This ensures safe boarding and alighting for passengers, maintains a low-vacuum environment within the tunnel, and enables long-term safe operation of ultra-high-speed train low-vacuum tunnels. Furthermore, repeated inflation and deflating of the low-vacuum tunnel is unnecessary during operation, effectively controlling energy consumption and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0041] Figure 1 This is a side view of the airtight ultra-high-speed train and its doors according to the present invention.

[0042] Figure 2 This is a cross-sectional view of the airtight ultra-high-speed train and the low-vacuum tunnel of the present invention (when stopped at a station).

[0043] Figure 3 This is a schematic diagram of the telescopic channel in the present invention in an unstretched state.

[0044] Figure 4 It is a half-side vertical cross-sectional view of the Z-shaped telescopic shell in the present invention.

[0045] Figure 5 It is a half-side vertical cross-sectional view of the U-shaped telescopic shell in the present invention.

[0046] Figure 6 It is a half-side vertical cross-sectional view of the L-shaped telescopic shell in the present invention.

[0047] Figure 7 It is a three-dimensional schematic diagram of the telescopic channel in the present invention.

[0048] The symbols in the figure are:

[0049] 1 - low vacuum tunnel, 2 - air-tight super high-speed train, 3 - tunnel lining, 4 - car body contour, 5 - cushion, 6 - train track, 7 - car door, 8 - passenger passage, 9 - platform door, 10 - platform plate, 11 - upper air cushion, 12 - lower air cushion, 13 - telescopic passage, 14 - control system, 15 - air pipe, 16 - air inlet pump, 17 - air valve;

[0050] 21 - magnetic attraction groove;

[0051] 31 - reinforced concrete, 32 - low magnetic steel plate, 33 - sealing door, 34 - overhead rail, 35 - roller, 36 - ground rail;

[0052] 71 - position when the car door is closed, 72 - position after the car door is opened;

[0053] 131 - Z-shaped telescopic shell, 132 - magnetic block ring, 133 - ball, 134 - sealing material, 135 - circular groove, 136 - pre-buried L-shaped steel plate, 137 - end ring plate, 138 - shell cylinder, 139 - U-shaped telescopic shell, 1310 - L-shaped telescopic shell. DETAILED DESCRIPTION

[0054] In order to facilitate the understanding of the present application, a more comprehensive description of the present application will be made below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0055] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "transverse", "longitudinal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0056] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "provided" should be understood broadly, for example, it can be fixedly connected, provided, or detachably connected, provided, or integrally connected, provided. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] It should also be noted that although the order of the steps is involved in the method description, in some cases, the order can be performed in a different order from here, and should not be understood as a limitation on the order of the steps.

[0058] In the detailed description, the length direction of the tunnel (or pipe) is defined as "longitudinal", the cross-sectional direction of the tunnel (or pipe) is defined as "transverse", the direction close to the center of the tunnel (or pipe) is defined as "inner", and the direction away from the center of the tunnel (or pipe) is defined as "outer".

[0059] The track transportation system involved in the present application is a low-vacuum magnetic levitation track train system, wherein the low-vacuum tunnel 1 involved is a circular cross-section structure as shown in Figure 2 The tunnel lining 3 has an inner steel shell, that is, a low-magnetic steel plate 32 is embedded in the middle of the tunnel on the basis of a conventional reinforced concrete 31, to meet the strength, stiffness, air tightness and toughness requirements of the vacuum tunnel 1. The tunnel bottom is provided with a bottom cushion layer 5 and a train track 6 is installed at the position of the tunnel bottom arch. The top profile of the train track 6 matches the bottom profile of the air-tight super high-speed train 2. The air-tight super high-speed train 2 involved is mainly composed of a car body, a car head and a wheel, and a door 7 is located on the lateral side of the car body. The air-tight super high-speed train 2 can run at a speed of about 1000 km / h in the quasi-vacuum environment provided by the low-vacuum tunnel 1. Figure 1 Figure 2 The bottom of the air-tight super high-speed train 2 is provided with an electromagnetic group and is located directly above the train track 6 and above the tunnel bottom cushion layer 5.

[0060] The technical solution of the above track transportation system is the prior art. The present application does not further improve the above structure system, but provides a low-vacuum tunnel super high-speed train connecting passage system for the above track transportation system. The existing low-vacuum tunnel super high-speed train passenger boarding and alighting passage is generally designed as a non-airtight space, and involves repeated inflation and air extraction cycles of the low-vacuum tunnel, which not only increases energy consumption and operating costs, but also does not comply with the construction concept of green and low-carbon track transportation, and causes great safety hazards to the tunnel body and internal equipment. The present application constructs an air-tight passenger passage through a telescopic three-dimensional shell, and in a completely contracted state, the whole can be hidden in the thickness range of the tunnel lining, greatly saving the operating cost and improving the stability and reliability of the passage system. Specifically, the present application designs a telescopic passage 13 arranged transversely in the low-vacuum tunnel super high-speed train connecting passage system. The telescopic passage 13 is located in the low-vacuum tunnel 1 and connected between the door 7 of the air-tight super high-speed train 2 and the platform door 9 arranged on the tunnel lining 3. The vertical profile of the telescopic passage 13 gradually decreases from the platform door 9 to the door 7.

[0061] The telescopic passage 13 is composed of multiple telescopic shells nested with each other, and the overall outer wall is in a three-dimensional sawtooth stepped shape, which specifically includes the following three types of telescopic shells:

[0062] 1. Z-shaped telescopic shell 131:

[0063] ​The telescopic passage 13 comprises several Z-shaped telescopic shells 131 nested in sequence, and the vertical profile of the Z-shaped telescopic shell 131 gradually increases from inside to outside.

[0064] As Figure 4 , the Z-shaped telescopic shell 131 comprises an end ring plate 137, a shell cylinder 138 and a magnetic block ring 132. The end ring plate 137 is located at the inner end of the shell cylinder 138 and is welded and fixed inside the shell cylinder 138. The magnetic block ring 132 is located at the outer end of the shell cylinder 138 and is fixed outside the shell cylinder 138 and bonded with the shell cylinder 138 by epoxy resin.

[0065] The number of nodes and the length of a single node of the Z-shaped telescopic shell 131 can be flexibly set according to the overall stability requirement of the connecting passage and the rigidity of the shell.

[0066] 2, U-shaped telescopic shell 139:

[0067] The inner side of the telescopic passage 13 is provided with a U-shaped telescopic shell 139, which is nested with the innermost Z-shaped telescopic shell 131, has the smallest vertical profile, and is used for docking the door 7.

[0068] As Figure 5 , the U-shaped telescopic shell 139 comprises a shell cylinder 138 and two magnetic block rings 132, which are respectively located at the inner and outer ends of the shell cylinder 138 and outside the shell cylinder 138, and are bonded with the shell cylinder 138 by epoxy resin.

[0069] 3, L-shaped telescopic shell 1310:

[0070] The outer side of the telescopic passage 13 is provided with an L-shaped telescopic shell 1310, which is nested with the outermost Z-shaped telescopic shell 131, has the largest vertical profile, and is used for connecting the platform door 9.

[0071] As Figure 6 , the L-shaped telescopic shell 1310 comprises an end ring plate 137 and a shell cylinder 138, and the end ring plate 137 is located at the inner end of the shell cylinder 138 and is welded and fixed inside the shell cylinder 138.

[0072] As Figure 3 , the innermost U-shaped telescopic shell 139, the middle multi-node Z-shaped telescopic shell 131 and the outermost L-shaped telescopic shell 1310 are nested with each other and are connected in series in the transverse direction. The U-shaped telescopic shell 139 and the Z-shaped telescopic shell 131 can move transversely, and the magnetic block ring 132 at the rear end of the previous telescopic shell can be clamped and positioned by the end ring plate 137 at the front end of the next telescopic shell, forming an air-tight passenger passage that can be extended and shortened. Since the vertical profile of the previous telescopic shell is smaller than that of the next telescopic shell, after being retracted backward, the previous telescopic shell can be moved into the next telescopic shell.

[0073] The outer periphery of the door 7 of the air-tight super-speed train 2 is provided with a magnetic attraction groove 21 matching the profile of the U-shaped telescopic shell 139. As shown in Figure 1 , the door 7 is opened from the middle to both sides, and there is a minimum safety distance between the door opening position 72 and the magnetic attraction groove 21. After the telescopic passage 13 is elongated from outside to inside, the magnetic block ring 132 of the U-shaped telescopic shell 139 is attracted into the magnetic attraction groove 21, thereby connecting the telescopic passage 13 with the air-tight super-speed train 2. The movement of the telescopic shell is controlled by the electromagnetic waves emitted by the magnetic attraction groove 21. When positive electromagnetic waves are emitted, the magnetic block ring 132 is attracted and moves forward; when negative electromagnetic waves are emitted, the magnetic block ring 132 is repelled and moves backward. The magnetic attraction groove 21 is provided with a cable coil and has the ability to emit positive and negative electromagnetic waves under the action of the control system. The width of the magnetic attraction groove 21 is about twice the height of the magnetic block ring 132 at the front end, and its depth should meet the requirement of effectively "clamping" the magnetic block ring 132. The transverse movement speed of the telescopic passage 13 is determined by the strength of the electromagnetic waves.

[0074] The outer side of the tunnel lining 3 is provided with a pre-buried L-shaped steel plate 136 around the hole of the platform door 9. The shell cylinder 138 of the L-shaped telescopic shell 1310 is welded and fixed to the pre-buried L-shaped steel plate 136 and cannot move.

[0075] As shown in Figure 1 , the profile of the magnetic attraction groove 21 and the telescopic shell is an arched upper part and a rectangular lower part, i.e. a circular arch straight wall form. Of course, the profile shape can also be adjusted according to actual needs.

[0076] The lengths of the telescopic shells of the telescopic passage 13 are basically the same, but the cross-sectional dimensions decrease in turn from the platform door 9 to the door 7 because they need to be nested with each other. The cross-sectional dimension of the first telescopic shell connected with the door 7 is accurately matched with the magnetic attraction groove 21, and the cross-sectional dimension of the last telescopic shell at the platform door 9 is accurately matched with the size of the reserved hole of the tunnel lining 3 and is welded and fixed through the pre-buried L-shaped steel plate 136.

[0077] In addition, in order to make the telescoping of the telescopic passage 13 more smooth, the present application is provided with a circular groove 135 in the inner circular end face of the end ring plate 137, and a ball 133 is arranged in the circular groove 135. A circular groove 135 is also provided in the outer circular end face of the magnetic block ring 132, and a ball 133 is arranged in the circular groove 135. The opening size of the circular groove 135 is about 85% of the diameter of the ball 133 to prevent the ball 133 from falling off. When the telescopic shell moves forward or backward, the ball 133 rolls on the outer wall of the shell cylinder 138 as the rolling surface. The balls 133 can be uniformly arranged at an interval of 30°-45° in the circumferential direction.

[0078] In other embodiments, the rear side of the end ring plate 137 and the front side of the magnetic block ring 132 of the U-shaped telescopic shell 139 can be provided with sealing material 134, which is bonded by epoxy resin and can serve to seal the entire telescopic passage 13. When the telescopic passage 13 is fully stretched, the sealing material 134 is effectively compressed, which can ensure the air tightness of the passage. At the same time, after the passage is stretched to the position, the ball 133 is located inside the sealing material 134 distributed in the circumferential direction, so as to ensure the air tightness requirement of the passenger passage. The sealing material 134 is continuously arranged in the circumferential direction, and the height thereof is about 1 / 2 of the height of the magnetic block ring 132. The thickness thereof satisfies the effective compression and air tightness requirement of the passage.

[0079] After the telescopic passage 13 is contracted outwardly and nested section by section, it enters the thickness range of the tunnel lining 3, and the inner side of the tunnel lining 3 is provided with a sealing door 33. When the train is running, the telescopic passage 13 is fully contracted and can be accommodated in the thickness range of the tunnel lining 3 and is blocked by the sealing door 33, which does not affect the train running. The upper side of the sealing door 33 is provided with a roller 35 and a hanging rail 34, and the lower side is provided with a roller 35 and a ground rail 36. The upper and lower rollers 35 are driven to slide on the surfaces of the hanging rail 34 and the ground rail 36, so as to promote the translation of the sealing door 33 until the telescopic passage 13 is completely covered. The contact positions of the hanging rail 34, the ground rail 36 and the roller 35 are provided with V-shaped tracks.

[0080] The system of the present application further comprises an upper air cushion 11 and a lower air cushion 12. The upper air cushion 11 is located at the bottom of the telescopic passage 13 and can serve as a walking surface for passengers to get on and off the train. The lower air cushion 12 is located at the bottom outside the telescopic passage 13 and can support the telescopic passage 13 after it is stretched to the position. The shapes of the upper air cushion 11 and the lower air cushion 12 match the profile and size of the zigzag telescopic passage 13. The train door 7, the telescopic passage 13, the upper air cushion 11, the lower air cushion 12, the platform door 9 and the platform plate 10 jointly constitute a passenger boarding passage 8 for passengers to get on and off the train.

[0081] The connection between the air-tight type super high-speed train 2 and the train door 7 and the connection between the magnetic attraction grooves 21 outside the train door opening position 72 and the telescopic passage 13 all need to meet the air tightness requirement.

[0082] As Figure 7 When each telescopic shell of the telescopic passage is fully stretched to the position, the total length thereof should match the design length of the passage, and at the same time, a certain tension along the length direction of the passage should be ensured. On the one hand, the effective compression of the sealing material at the front end of the telescopic shell and the air tightness thereof are ensured. On the other hand, a certain stiffness and toughness along the length direction of the passage are ensured. Generally, it can be controlled according to n x L1 = L2 - n x d (mm), wherein n is the number of telescopic shells, L1 is the length of a single telescopic shell, L2 is the distance between the train door 7 and the platform door 9, and d is half of the thickness of the sealing material 134.

[0083] Since the air-tight type super high-speed train 2 mainly relies on electromagnetic force for driving, the low magnetic steel plate 32 pre-embedded in the middle of the tunnel lining 3, the steel bars in the reinforced concrete 31, the pre-embedded L-shaped steel plate 136 at the opening of the platform door 9, and the steel materials such as the telescopic shell must all have low magnetic properties.

[0084] In the above structure, the low magnetic steel plate 32, the platform door 9, the telescopic shell, the pre-embedded L-shaped steel plate 136, the sealing door 33, the roller shaft 35, the overhead rail 34, and the ground rail 36 can all use Q345 steel materials, the reinforced concrete 31, the bottom cushion layer 5, the train track 6, and the platform plate 10 all use low magnetic reinforced concrete, and the sealing material 134 can consider using ethylene propylene diene rubber EPDM, which has good flame retardant performance.

[0085] The present application is based on the concept of magnetic attraction control and free sliding, and designs an air-tight type telescopic passage, which meets the needs of the train operation in a quasi-vacuum environment, realizes the normal pressure environment of the train interior and the passenger passage, solves the problem of safe boarding and alighting for passengers, and has the following structural characteristics:

[0086] 1. The low-vacuum tunnel super high-speed train connecting passage system proposed by the present application uses a three-dimensional telescopic shell as a basic unit, and sets sealing materials 134 and magnetic block rings 132 at the front and rear ends, respectively, realizes the free telescoping and air-tightness requirements of the telescopic passage 13 in the horizontal direction through the mutual nesting of adjacent telescopic shells and the setting of the contact part of the rolling ball 133.

[0087] 2. The stretching and retraction of the telescopic passage 13 is mainly realized through the interaction between the magnetic block ring 132 and the electromagnetic waves emitted in the magnetic attraction groove 21 outside the door 7, and the stability of the telescopic passage 13 is mainly realized through the welding fixation between the last telescopic shell and the pre-embedded L-shaped steel plate 136 of the tunnel lining 3 and the nesting constraint between the adjacent segments.

[0088] 3. The air-tightness of the telescopic passage 13 is mainly realized through the sealing performance of the sealing materials 134 at the end of each telescopic shell in the compressed state, so the sealing materials 134 use ethylene propylene diene rubber with a certain elasticity, and at the same time, it should be ensured that the telescopic passage 13 in the fully stretched state forms an effective extrusion effect on the end sealing materials 134.

[0089] 4. The embedded connection of the movable sealing door 33, the upper overhead rail 34, and the lower ground rail 36 meets the stability requirements under the action of the wind pressure of the super high-speed train operation.

[0090] The operation process of the above-mentioned low-vacuum tunnel super high-speed train connecting passage system is as follows:

[0091] S1: After the air-tight type super high-speed train 2 stops at the station, the sealing door 33 is opened under the control of the system.

[0092] S2: The lower air cushion 12 is inflated and expanded.

[0093] S3: The magnetic attraction groove 21 emits electromagnetic waves to attract the magnetic block ring 132 of the telescopic channel 13, the telescopic channel 13 is elongated inward, the magnetic block ring 132 at the rear end of the previous section of the telescopic shell is clamped and positioned by the end ring plate 137 at the front end of the next section of the telescopic shell, and finally nests in place.

[0094] S4: The magnetic block ring 132 at the front end is attracted into the magnetic attraction groove 21, and the telescopic channel 13 is sealed.

[0095] S5: The upper air cushion 11 is inflated and expanded to form a smooth channel for passengers to walk.

[0096] S6: First open the platform door 9, then open the train door 7, the gas pressure in the telescopic channel 13 is consistent with the inside of the train and the station area, which is a normal atmospheric pressure state, and is effectively isolated from the low vacuum environment in the low vacuum tunnel 1, and passengers start to get on and off the train.

[0097] S7: After the passengers get on and off the train, first close the train door 7, then close the platform door 9, and the upper air cushion 11 is released and recovered.

[0098] The train door 7 and the platform door 9 are two doors that control the opening and closing of the channel. When the air-tight super high-speed train 2 arrives at the station, the sealing door 33 is opened first, then the platform door 9 is opened first, and the train door 7 is opened later. When the air-tight super high-speed train 2 leaves the station, the train door 7 is closed first, the platform door 9 is closed later, and the sealing door 33 is closed last and completely covers the outline of the telescopic channel 13.

[0099] In the above process, after the air-tight super high-speed train 2 stops at the station, a circle of magnetic attraction grooves 21 around the train door 7 emits electromagnetic waves. According to the principle of opposite sex attraction, under the mutual attraction of electromagnetic waves and magnetic block rings 132, the telescopic shell and the magnetic block ring 132 are slowly pulled out of the tunnel lining 3 with the help of the rolling of the ball 133, and are gradually attracted into the interior of the magnetic attraction groove 21 around the train door, the telescopic channel 13 is maximally elongated, and the sealing material 134 of the telescopic shell is effectively compressed, forming a relatively independent three-dimensional space that meets the air pressure difference between the inside and outside of the channel. The inflation of the lower air cushion 12 under the channel is synchronized with the elongation of the telescopic shell, and the upper air cushion 11 above the channel is inflated last to form a smooth channel for passengers to walk.

[0100] S8: The magnetic attraction groove 21 emits reverse electromagnetic waves to repel the magnetic block ring 132 of the telescopic channel 13, the telescopic channel 13 is contracted outward, and retreats back to the thickness range of the tunnel lining 3.

[0101] S9: The lower air cushion 12 releases and recovers, the roller 35 rolls inside the upper hanging rail 34 and the lower ground rail 36, drives the movable door 33 to slide horizontally until the retractable passage door is completely closed.

[0102] S10: The train starts and the running speed gradually increases to the super high speed state and drives to the next station.

[0103] In the above process, the same electromagnetic wave as the magnetic block ring 132 occurs in the magnetic attraction groove 21 around the door 7, according to the same repulsion principle, the retractable shell of the retractable passage 13 is gradually withdrawn backward, and finally hidden in the thickness range of the tunnel lining 3, and then the door 33 is closed. Finally, the air-tight super high-speed train 2 starts gradually, the running speed gradually increases and runs to the next station.

[0104] In addition, in order to ensure safe operation, the air inlet system is arranged at a distance above the passage, mainly composed of a control system 14, a air pipe 15, an air inlet pump 16 and an air valve 17, which is used to inflate the low vacuum tunnel 1 and restore the normal pressure state when the train or the air tightness of the retractable passage fails to meet the requirements or the air tightness is lost, which can effectively eliminate various dangers faced in the case of insufficient or partial loss of air tightness. When the air tightness of the passage is detected to be insufficient, the air valve 17 is opened through the control system 14, and the tunnel is inflated in the first time through the air inlet pump 16, so as to restore the normal pressure state in the tunnel.

[0105] The low vacuum tunnel 1 related to the present application has the following construction process:

[0106] (1) According to the design requirements of the profile and size, the low magnetic steel plate 32 is made with a longitudinal 1-2m as a unit, and according to the overall stiffness and toughness requirements of the tunnel, the low magnetic steel plate 32 can be made of Q345 steel material, and the thickness is considered to be 5-10mm;

[0107] (2) According to the inverted arch, the left and right lower and upper parts and the construction sequence, the construction of the whole tunnel is divided into three parts from bottom to top, and each part is poured according to the sequence of the outer side reinforced concrete and the middle steel plate, and the inner side reinforced concrete;

[0108] (3) The low magnetic steel plate 32 is arranged in a plum blossom shape on both sides, and a shear pin can be used, which has a diameter of 5mm and a spacing of 1-2cm;

[0109] (4) First, the formwork is set (including the bottom formwork, the side formwork and the end formwork), the steel bars are tied, and the corresponding part of the low magnetic steel plate 32 is used as the top formwork, then the outer side reinforced concrete of the tunnel inverted arch is poured, and the formwork is removed after the maintenance period, then the inner side reinforced concrete of the inverted arch part is poured, and then the left and right lower and upper parts of the tunnel lining are completed in turn;

[0110] (5) Reserve a hole in the position of the platform door 9, and set L-shaped steel plate 136 on the upper and lower positions of the hole;

[0111] (6) According to the train operation needs, the low vacuum tunnel 1 invert position is poured with the bottom cushion 5;

[0112] (7) Above the tunnel bottom cushion 5, the train track 6 is poured according to the design requirements, and the overall stiffness and flatness need to meet the train operation needs;

[0113] (8) Set the platform door 9 outside the tunnel lining 3, and the bottom is connected with the platform plate 10;

[0114] (9) According to the size of the reserved hole of the tunnel lining 3 at the expansion channel 13, a movable door 33 made of low magnetic steel plate with a thickness of about 5mm is used, and based on the horizontal sliding requirement, a hanging rail 34 and a ground rail 36 firmly linked with the reinforced concrete 31 are respectively set at the top and bottom of the movable door 33, and a roller 35 is set at the contact position of the movable door 33 and the hanging rail 34 and the ground rail 36, and the contact position of the roller 35 and the hanging rail 34 and the ground rail 36 is provided with a "V" type track.

[0115] Based on the construction of the above low vacuum tunnel 1, the low vacuum tunnel super high-speed train connecting channel system provided by the application can be produced and installed on site through the following process:

[0116] S1: Prepare low magnetic steel plate.

[0117] S2: According to the design requirements, based on the basic outline shape of the expansion channel 13, the low magnetic steel plate with a certain thickness is rolled into various types of expansion shell shells with circular arch straight wall cross section, and the end ring plate 137 with different inner and outer radius sizes is welded by using steel plate with small width.

[0118] S3: Weld the end ring plate 137 to the shell cylinder 138, and paste the magnetic block ring 132 and the sealing material 134 (EPDM sealing material) prepared in advance, and the outer side of the magnetic block ring 132 can also be wrapped with the end ring plate 137 according to the overall stiffness requirement.

[0119] S4: Weld the circular groove 135 prepared in advance on the end ring plate 137, put the ball 133 in the circular groove 135 in advance, and make a hole in the middle of the top of the magnetic block ring 132, and the size of the circular groove 135 after the hole is put in should ensure that the ball 133 can roll freely after being placed but not fall off, thereby completing the production of the basic structure unit of the expansion channel 13.

[0120] As Figure 4The front end ball 133 of the telescopic shell and the ball 133 embedded on the surface of the rear end magnetic block ring 132 are both installed by the circular groove 135, the opening size of the circular groove 135 is about 85% of the diameter of the ball 133, but the diameter of the circular groove 135 is 1.1 times of the diameter of the ball 133, so that the ball 133 is effectively clamped in the circular groove 135 and can freely roll.

[0121] S5: According to the design requirements, the telescopic shells with different cross-sectional sizes are nested and assembled, the L-shaped telescopic shell 1310 with the maximum outer size is welded and anchored with the embedded L-shaped steel plate 136 of the tunnel lining 3, and meanwhile, the total length of all the telescopic shells in the maximum contraction state is ensured to be less than the thickness of the tunnel lining 3, and the total length in the maximum extension state is accurately matched with the length of the channel.

[0122] As Figure 3 In the transverse direction of the low-vacuum tunnel 1, the tunnel lining 3 has the embedded L-shaped steel plate 136 at the upper and lower ends of the hole at the position of the platform door 9, in order to ensure the overall stability of the telescopic channel, the back of the last telescopic shell is welded and fixed with the embedded L-shaped steel plate 136 at the hole of the tunnel lining 3.

[0123] S6: According to the running wind pressure, temperature and their influence of the air-tight super-high-speed train 2, the stability of the door 33 mainly depends on the upper hanging rail 34 and the lower ground rail 36, and the embedded steel plate in the tunnel lining 3 is welded and fixed with the hanging rail 34 and the ground rail 36.

[0124] S7: The air cushions that can be repeatedly inflated and deflated are arranged as required, and the lower air cushion 12 below the bottom channel and the upper air cushion 11 above the bottom channel are arranged respectively, and the top of the upper air cushion 11 needs to meet the requirements of flatness and stability of the pedestrian channel after being fully inflated.

[0125] The telescopic channel 13 is a flexible structure along the length direction, and the flexibility is mainly realized by the two air cushions and the "tie" between the front and rear adjacent telescopic shells, which is fundamentally different from the conventional reinforced concrete channel structure, and there are two different states during the train stopping at the station and running, so as to fully adapt to the engineering characteristics and actual needs of the low-vacuum tunnel super-high-speed train.

[0126] In the implementation process of the method, the following needs to be paid attention to:

[0127] 1. The running of the super-high-speed train mainly depends on the magnetic suspension system, so the steel materials involved, including various steels and steel plates, need to use low-magnetic steel materials, among which the low-magnetic steel plate 32 in the tunnel lining 3 can be made of Q345 steel material with a thickness of 5-10 mm, the telescopic shell, the main component of the telescopic channel 13, can be made of low-magnetic steel plate with a thickness of about 5 mm, and the door 33 can also be made of low-magnetic steel plate with a thickness of about 5 mm.

[0128] 2. The ultra-high-speed train runs at a speed of about 1000 km / h, which causes a large wind pressure and high temperature inside the low vacuum tunnel 1. Therefore, various internal equipment and their connecting parts, including the hanging rails 34 and ground rails 36 used to fix the movable sealing door 33, must be able to withstand the corresponding wind pressure and high temperature.

[0129] 3. The electromagnetic waves emitted from the magnetic grooves 21 around the door 7 and the air supply system above the platform door 9 are all controlled by corresponding systems. The control system must meet the timeliness and reliability requirements of the electromagnetic wave emission in both the forward and reverse directions and the air supply in the low vacuum tunnel 1;

[0130] 4. The opening size of the circular grooves 135 at both ends of the telescopic housing is approximately 85% of the diameter of the ball 133. At the same time, the diameter of the circular grooves 135 is 1.1 times the diameter of the ball 133, so that the ball 133 is effectively stuck in the circular grooves 135 and can roll freely;

[0131] 5. When the telescopic housing sections of the telescopic channel are fully extended, their lengths must follow the formula: n × L1 = L2 - n × d (mm), where n is the number of telescopic housing sections, L1 is the length of a single telescopic housing section, L2 is the distance from the vehicle door 7 to the platform door 9, and d is half the thickness of the sealing material 134;

[0132] 6. The telescopic channel 13 is mainly composed of various telescopic shell sections. When fully extended, the sealing material 134 at the front end of the telescopic shell is effectively compressed. The degree of compression can be considered as 1 / 2 of the material thickness. At this time, the airtightness requirements of the channel must be met. At the same time, the embedded bite effect between the adjacent telescopic shells along the longitudinal direction of the channel must meet the longitudinal stiffness and toughness requirements of the channel.

[0133] 7. The sealing material 134 provided at the front end of the telescopic housing is continuously arranged along the circumferential direction, and the magnetic ring 132, the ball 133 and the circular groove 135 can be evenly arranged at 30° to 45° along the circumferential direction;

[0134] 8. When all telescopic shells are retracted into place, their total width is ≤3 times the thickness of the tunnel lining.

[0135] The structure of the present invention has the following characteristics and advantages:

[0136] 1) Based on the principle of "magnetic control and free sliding," this invention constructs a three-dimensional channel system that can freely expand and contract in the horizontal direction. The channel has a certain degree of toughness and rigidity along its longitudinal direction and provides overall stability for safe passenger passage. During high-speed train operation, the channel can be completely hidden within the thickness of the tunnel lining, minimizing the negative impact on the gas flow trajectory in the low-vacuum tunnel.

[0137] 2) The telescopic channel of the present application takes into account the "resilience" and overall stability, mainly composed of telescopic shell, the sealing material and magnetic block at the front and rear ends of the shell can ensure the air tightness and horizontal movement requirements of the channel; the free movement between the shells is mainly realized by the ball bearings set at the top and bottom of both ends, the ball bearings are effectively embedded in the circular grooves, and the size control at the groove opening can realize the free rolling of the ball bearings but cannot fall off;

[0138] 3) The telescopic shell connected directly with the magnetic recess on the outer side of the door, the height of the front end magnetic block is about half of the height of the magnetic recess, and the outline size of the two needs to be accurately matched, the magnetic recess can emit electromagnetic waves opposite or consistent with the magnetic block according to the needs, to stretch or retract the channel;

[0139] 4) The low-vacuum tunnel (or pipeline) super-high-speed train connecting channel system constructed by the present application meets the requirements of on-site rapid and safe operation, as well as the safe passage of passengers, greatly improves the on-site efficiency, and conforms to the industry trend of green and low carbon. The scheme idea is clear, the process is simple, the construction is simple, and it has high economic and social benefits, and has wide application prospects in air-tight channels related to urban underground space development, maglev rail transit projects and the like.

[0140] The above application of specific examples to the present application is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A low-vacuum tunnel super-high-speed train connecting passage system, characterized in that: the system comprises a transversely arranged telescopic passage (13) located in a low-vacuum tunnel (1) and connected between a door (7) of an air-tight super-high-speed train (2) and a platform door (9) arranged on a tunnel lining (3); the telescopic passage (13) comprises a plurality of Z-shaped telescopic shells (131) nested in sequence, a vertical profile of the Z-shaped telescopic shells (131) gradually increases from inside to outside; the Z-shaped telescopic shells (131) comprise an end ring plate (137), a shell cylinder (138) and a magnetic block ring (132); the end ring plate (137) is located at an inner end of the shell cylinder (138) and fixed inside the shell cylinder (138); the magnetic block ring (132) is located at an outer end of the shell cylinder (138) and fixed outside the shell cylinder (138); an inner side of the telescopic passage (13) is provided with a U-shaped telescopic shell (139) nested with the innermost Z-shaped telescopic shell (131); the U-shaped telescopic shell (139) comprises a shell cylinder (138) and two magnetic block rings (132); the two magnetic block rings (132) are respectively located at inner and outer ends of the shell cylinder (138) and outside the shell cylinder (138); the telescopic passage (13) is small inside and large outside as a whole, an outer wall thereof is in a three-dimensional zigzag stepped shape, and in a completely retracted state, the telescopic passage (13) is completely hidden in a thickness range of the tunnel lining; a rear side of the end ring plate (137) of the Z-shaped telescopic shell (131) and a front side of the magnetic block ring (132) at an inner end of the U-shaped telescopic shell (139) are provided with a sealing material (134), when the telescopic passage (13) is completely extended in place, the sealing material (134) is effectively compressed by 1 / 2 of a material thickness.

2. The low-vacuum tunnel super-high-speed train connecting passage system according to claim 1, characterized in that: an outer side of the telescopic passage (13) is provided with an L-shaped telescopic shell (1310) nested with the outermost Z-shaped telescopic shell (131); the L-shaped telescopic shell (1310) comprises an end ring plate (137) and a shell cylinder (138); the end ring plate (137) is located at an inner end of the shell cylinder (138) and fixed inside the shell cylinder (138).

3. The low-vacuum tunnel super-high-speed train connecting passage system according to claim 2, characterized in that: an inner circular end surface of the end ring plate (137) is provided with a circular groove (135), and the circular groove (135) is provided with a ball (133); an outer circular end surface of the magnetic block ring (132) is provided with a circular groove (135), and the circular groove (135) is provided with a ball (133).

4. The low-vacuum tunnel super-high-speed train connecting passage system according to claim 3, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The outer periphery of the door (7) of the air-tight super high-speed train (2) is provided with a magnetic attraction groove (21) matching the profile of the U-shaped telescopic shell (139); After the telescopic channel (13) is elongated from outside to inside, the magnetic block ring (132) of the U-shaped telescopic shell (139) is attracted to the magnetic attraction groove (21), thereby connecting the telescopic channel (13) with the air-tight super high-speed train (2).

5. The low-vacuum tunnel super high-speed train connecting channel system according to claim 4, characterized in that: The outer side of the tunnel lining (3) is provided with a pre-buried L-shaped steel plate (136), and the shell cylinder (138) of the L-shaped telescopic shell (1310) is fixed to the pre-buried L-shaped steel plate (136).

6. The low-vacuum tunnel super high-speed train connecting channel system according to claim 5, characterized in that: The inner side of the tunnel lining (3) is provided with a door (33).

7. The low-vacuum tunnel super high-speed train connecting channel system according to claim 6, characterized in that: The system further comprises an upper air cushion (11) and a lower air cushion (12); The upper air cushion (11) is located at the bottom of the telescopic channel (13); The lower air cushion (12) is located at the bottom outside the telescopic channel (13).

8. The operation method of the low-vacuum tunnel super high-speed train connecting channel system according to claim 7, characterized in that: The method comprises: After the air-tight super high-speed train (2) stops at the station, the door (33) is opened; The lower air cushion (12) is inflated and expanded; The magnetic attraction groove (21) emits electromagnetic waves to attract the magnetic block ring (132) of the telescopic channel (13), the telescopic channel (13) is elongated inward, the magnetic block ring (132) at the rear end of the previous telescopic shell is clamped and positioned by the end ring plate (137) at the front end of the next telescopic shell, and finally nests in place; The magnetic block ring (132) at the front end is attracted to the magnetic attraction groove (21), and the telescopic channel (13) is sealed; The upper air cushion (11) is inflated and expanded to form a smooth channel for passengers to walk; First, the platform door (9) is opened, and then the door (7) is opened, and passengers start to get on and off the train; After the passengers get on and off the train, the door (7) is closed first, and then the platform door (9) is closed, and the upper air cushion (11) is deflated and recovered; The magnetic attraction groove (21) emits reverse electromagnetic waves to repel the magnetic block ring (132) of the telescopic channel (13), and the telescopic channel (13) is contracted outward and withdrawn to the thickness range of the tunnel lining (3); The lower air cushion (12) is deflated and recovered, and the door (33) is closed; The air-tight super high-speed train (2) starts.

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