Channel system for connection of ultra-high-speed train in low-vacuum tunnel and operation method of channel system

Abstract

The invention relates to a channel system for connecting an ultra-high-speed train in a low-vacuum tunnel and an operation method of the channel system, and the system comprises a transversely arranged telescopic channel which is positioned in the low-vacuum tunnel, is connected between a train door of an airtight ultra-high-speed train and a platform door arranged on a tunnel lining, and comprises a plurality of sections of Z-shaped telescopic shells which are sequentially nested, and the vertical outline is gradually increased from inside to outside. The telescopic channel can be hidden in the thickness range of a low-vacuum tunnel lining in a compressed state, can be connected between a train door and a tunnel lining platform door in an extended state, operates by means of a magnetic attraction principle, serves as a telescopic three-dimensional shell structure system, has reliable air tightness measures, and is high in reliability and high in reliability. And meanwhile, the low-vacuum tunnel has certain overall rigidity, toughness and stability after being completely extended, repeated air inflation and air exhaust do not need to be conducted on the low-vacuum tunnel in the operation process, energy consumption is effectively controlled, the operation cost is reduced, and potential safety hazards caused by repeated changes of air pressure in the low-vacuum tunnel are fundamentally avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of low-vacuum tunnel maglev transportation, and particularly relates to a passage system for connecting a low-vacuum tunnel ultra-high-speed train and an operation method thereof. Background Art

[0002] With the development of rail transit towards higher speeds and lower energy consumption, the concept of ultra-high-speed maglev trains based on a low-vacuum environment has entered the experimental stage from the theoretical stage. Today, with the increasingly mature theory and practical experience in the construction of ultra-high-speed maglev trains in low-vacuum pipelines (or tunnels), to ensure the construction of ultra-high-speed maglev trains, it is necessary to solve the problem of safe boarding and alighting of passengers. Since the inside of the pipeline (or tunnel) around the train is in a low-vacuum environment, which is significantly different from the atmospheric pressure environment inside the train and outside the pipeline (or tunnel), how to establish an airtight passenger passage connected to the ultra-high-speed train on the premise of ensuring that the low-vacuum environment inside the pipeline (or tunnel) is basically unaffected is one of the major technical problems generally concerned in the industry.

[0003] However, the current technical solutions for ultra-high-speed train passenger passages mainly focus on non-airtight solutions, that is, when passengers board and alight, it is necessary to restore the low-vacuum pipeline (or tunnel) to the normal atmospheric pressure state, and then evacuate the pipeline (or tunnel) after passengers finish boarding and alighting. Repeating this process not only greatly increases energy consumption and operating costs, but also poses great safety hazards to both the pipeline (or tunnel) body and internal equipment during the repeated inflation and evacuation of the pipeline (or tunnel), which cannot meet the construction requirements of green and low-carbon ultra-high-speed trains, nor the basic goal of safe operation for a hundred years.

[0004] Therefore, it is necessary to propose new technical measures for airtight passenger passages to overcome the above defects, meeting the airtightness requirements of the passage on the one hand and the safety and stability requirements of the passage during ultra-high-speed train operation on the other hand. Summary of the Invention

[0005] The purpose of the present invention is to provide a passage system for connecting a low-vacuum tunnel ultra-high-speed train and an operation method thereof to solve the non-airtightness problem of the existing passenger passage, the high energy consumption problem of repeatedly inflating and evacuating the low-vacuum tunnel, and the resulting safety hazard problem.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] Provide a passage system for connecting a low-vacuum tunnel ultra-high-speed train, the system includes a telescopic passage arranged horizontally, the telescopic passage is located in the low-vacuum tunnel and is connected between the door of the airtight ultra-high-speed train and the platform door arranged on the tunnel lining;

[0008] The telescopic channel includes 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 includes 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, a U-shaped telescopic shell is arranged inside the telescopic channel, and the U-shaped telescopic shell is nested with the innermost Z-shaped telescopic shell;

[0013] The U-shaped telescopic shell includes 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 are located outside the shell cylinder.

[0015] Further, an L-shaped telescopic shell is arranged outside the telescopic channel, and the L-shaped telescopic shell is nested with the outermost Z-shaped telescopic shell;

[0016] The L-shaped telescopic shell includes 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, a circular groove is arranged on the inner circular end face of the end ring plate, and a ball is arranged in the circular groove;

[0019] A circular groove is arranged on the outer circular end face of the magnetic block ring, and a ball is arranged in the circular groove.

[0020] Further, a magnetic attraction groove matching the contour of the U-shaped telescopic shell is arranged on the outer periphery of the car door of the airtight high-speed train;

[0021] After the telescopic channel extends from outside to inside, the magnetic block ring of the U-shaped telescopic shell is sucked into the magnetic attraction groove, thereby connecting the telescopic channel with the airtight high-speed train.

[0022] Further, a pre-embedded L-shaped steel plate is arranged outside the tunnel lining, 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 contracts outward and is located within the thickness range of the tunnel lining, a sealing door is arranged on the inner side of the tunnel lining.

[0024] Further, the system further includes an upper air cushion and a lower air cushion;

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

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

[0027] On the other hand, there is provided an operation method of the channel system for connecting a low-vacuum tunnel ultra-high-speed train as described above, and the method includes:

[0028] After the airtight ultra-high-speed train arrives at the station and stops, the sealing door is opened;

[0029] The lower air cushion is inflated and expanded;

[0030] The magnetic attraction groove emits electromagnetic waves to attract the magnetic block ring of the telescopic channel, the telescopic channel extends inward, the magnetic block ring at the rear end of the front telescopic housing is caught and limited by the end ring plate at the front end of the rear telescopic housing, and finally nests in place;

[0031] The magnetic block ring at the forefront is sucked into the magnetic attraction groove, and the telescopic channel is sealed;

[0032] The upper air cushion is inflated and expanded to form a stable channel for passengers to walk;

[0033] First, the platform door is opened, and then the car door is opened, and passengers start to get on and off the train;

[0034] After the passengers finish getting on and off the train, first the car door is closed, and then the platform door is closed, and the upper air cushion is deflated and recovered;

[0035] The magnetic attraction groove emits reverse electromagnetic waves to repel the magnetic block ring of the telescopic channel, the telescopic channel contracts outward, and retreats to the range of the tunnel lining thickness;

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

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

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] The present invention provides a channel system for connecting a low-vacuum tunnel ultra-high-speed train and its operation method. As a reliable and retractable three-dimensional shell structure system, it not only has reliable airtightness guarantee measures, but also has a certain overall stiffness, toughness and stability along the channel direction when fully extended. When fully retracted, it can be hidden within the thickness range of the tunnel lining, which can minimize the adverse effects of the corresponding wind pressure and high temperature during the operation of the ultra-high-speed train. Furthermore, it can meet the safe boarding and alighting of passengers, maintain the low-vacuum environment in the tunnel, and achieve the long-term safe operation of the ultra-high-speed train in the low-vacuum tunnel. Moreover, during the operation process, there is no need to repeatedly inflate and extract air from the low-vacuum tunnel, effectively controlling the energy consumption and operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 Side view of the airtight ultra-high-speed train and the door in the present invention.

[0042] Figure 2 Cross-sectional view of the airtight ultra-high-speed train and the low-vacuum tunnel in the present invention (when docking at the station).

[0043] Figure 3 Schematic diagram of the non-stretched state of the telescopic channel in the present invention.

[0044] Figure 4 Half-side vertical sectional view of the Z-shaped telescopic shell in the present invention.

[0045] Figure 5 Half-side vertical sectional view of the U-shaped telescopic shell in the present invention.

[0046] Figure 6 Half-side vertical sectional view of the L-shaped telescopic shell in the present invention.

[0047] Figure 7 Three-dimensional schematic diagram of the telescopic channel in the present invention.

[0048] The labels in the figure are as follows:

[0049] 1 - Low - vacuum tunnel, 2 - Air - tight ultra - high - speed train, 3 - Tunnel lining, 4 - Body contour, 5 - Cushion layer, 6 - Train track, 7 - Door, 8 - Passenger passage, 9 - Platform door, 10 - Platform slab, 11 - Upper air cushion, 12 - Lower air cushion, 13 - Telescopic passage, 14 - Control system, 15 - Air duct, 16 - Air intake pump, 17 - Air valve;

[0050] 21 - Magnetic - absorption groove;

[0051] 31 - Reinforced concrete, 32 - Low - magnetic steel plate, 33 - Sealing door, 34 - Suspension rail, 35 - Roller, 36 - Floor rail;

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

[0053] 131 - Z - shaped telescopic housing, 132 - Magnetic block ring, 133 - Ball, 134 - Sealing material, 135 - Circular groove. 136 - Embedded L - shaped steel plate, 137 - End ring plate, 138 - Shell cylinder, 139 - U - shaped telescopic housing, 1310 - L - shaped telescopic housing. Detailed implementation mode

[0054] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "longitudinal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0056] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] It should also be noted that although the step sequence is involved in the method description, in some cases, it can be executed in a different order from here and should not be construed as a limitation of the step sequence.

[0058] In the specific implementation manner, the length direction of the tunnel (or pipeline) is defined as "longitudinal", the cross-sectional direction of the tunnel (or pipeline) is defined as "transverse", the position close to the center inside the tunnel (or pipeline) is defined as "inner", and the position far from the center inside the tunnel (or pipeline) is defined as "outer".

[0059] The rail transit system involved in the present invention is a low-vacuum maglev rail train system, and the low-vacuum tunnel 1 involved therein is as Figure 2 shown, with a quasi-circular cross-section structure. The tunnel lining 3 has an inner steel shell, that is, on the basis of the conventional reinforced concrete 31, a low-magnetic steel plate 32 is embedded in the middle of the tunnel to meet the strength, stiffness, airtightness and toughness requirements of the vacuum tunnel 1. A bottom cushion 5 is constructed at the invert position of the tunnel bottom and a train track 6 is installed. The top contour of the train track 6 matches the bottom contour of the airtight high-speed train 2. The airtight high-speed train 2 involved is as Figure 1 and Figure 2 shown. An electromagnetic group is provided at the bottom and is located directly above the train track 6, and at the same time is located above the tunnel bottom cushion 5. The airtight high-speed train 2 is mainly composed of components such as a vehicle body, a train head and wheels. The door 7 is located on one side of the vehicle body in the transverse direction. The airtight high-speed train 2 can run at a high speed of about 1000 km / h in the quasi-vacuum environment provided inside the low-vacuum tunnel 1.

[0060] The technical solution of the above rail transit system is the prior art. The present invention does not make further improvements to the above structural system, but provides a channel system for connecting a low-vacuum tunnel high-speed train for the above rail transit system. The existing passenger boarding and alighting channels for low-vacuum tunnel high-speed trains are generally designed according to non-airtight spaces, and at the same time involve repeated inflation and deflation cycles of the low-vacuum tunnel, which not only increases energy consumption and operating costs and does not conform to the construction concept of green and low-carbon rail transit, but also poses great safety hazards to the tunnel body and internal equipment. The present invention constructs an airtight passenger channel through a telescopic three-dimensional shell, and can be integrally hidden within the thickness range of the tunnel lining in the fully retracted state, greatly saving operating costs and improving the stability and reliability of the channel system. Specifically, the present invention designs a horizontally arranged telescopic channel 13 in the channel system for connecting a low-vacuum tunnel high-speed train. The telescopic channel 13 is located inside the low-vacuum tunnel 1 and is connected between the door 7 of the airtight high-speed train 2 and the platform door 9 provided on the tunnel lining 3, and the vertical contour gradually shrinks from the platform door 9 to the door 7.

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

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

[0063] The telescopic channel 13 includes several nested Z-shaped telescopic shells 131 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 includes an end ring plate 137, a shell cylinder 138, and a magnet 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 magnet ring 132 is located at the outer end of the shell cylinder 138 and is fixed outside the shell cylinder 138 and bonded to the shell cylinder 138 through epoxy resin.

[0065] The number of sections and the length of a single section of the Z-shaped telescopic shell 131 can be flexibly set according to the overall stability requirements of the connecting channel and the stiffness of the shell.

[0066] 2. U-shaped telescopic shell 131:

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

[0068] As Figure 5 , the U-shaped telescopic shell 131 includes a shell cylinder 138 and two magnet rings 132. The two magnet rings 132 are respectively located at the inner and outer ends of the shell cylinder 138 and outside the shell cylinder 138 and are bonded to the shell cylinder 138 through epoxy resin.

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

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

[0071] As Figure 6 , the L-shaped telescopic shell 1310 includes an end ring plate 137 and a shell cylinder 138. 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 131, the middle multi-section Z-shaped telescopic shells 131, and the outermost L-shaped telescopic shell 1310 are nested with each other and connected in series horizontally. The U-shaped telescopic shell 131 and the Z-shaped telescopic shell 131 can move horizontally. The magnet ring 132 at the rear end of the previous telescopic shell can be caught and limited by the end ring plate 137 at the front end of the next telescopic shell, forming an airtight passenger channel 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 retracting backward, the previous telescopic shell can move into the next telescopic shell.

[0073] A magnetic attraction groove 21 matching the contour of the U-shaped telescopic housing 131 is provided on the outer periphery of the door 7 of the airtight high-speed train 2. As Figure 1 , the door 7 opens 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 channel 13 extends from the outside to the inside, the magnetic block ring 132 of the U-shaped telescopic housing 131 is sucked into the magnetic attraction groove 21, thereby connecting the telescopic channel 13 with the airtight high-speed train 2. The movement of the telescopic housing is controlled by the electromagnetic wave emitted by the magnetic attraction groove 21. When a forward electromagnetic wave is emitted, the magnetic block ring 132 is attracted and moves forward; when a reverse electromagnetic wave is emitted, the magnetic block ring 132 is repelled and moves backward. A cable coil is laid in the magnetic attraction groove 21, and it has the ability to emit forward and reverse 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 at the same time, its depth should meet the requirement of effectively "clamping" the magnetic block ring 132. The lateral movement speed of the telescopic channel 13 is determined by the strength of the electromagnetic wave.

[0074] An embedded L-shaped steel plate 136 is provided on the outer side of the tunnel lining 3, around the holes of the platform door 9. The outer end of the shell cylinder 138 of the L-shaped telescopic housing 1310 is welded and fixed to the embedded L-shaped steel plate 136 and cannot move.

[0075] As Figure 1 , the contours of the magnetic attraction groove 21 and the telescopic housing are of a structure with an arched upper part and a rectangular lower part, that is, the form of a circular arch and straight wall. Of course, the contour shape can also be adjusted according to actual needs.

[0076] The lengths of the telescopic shells of each section of the telescopic channel 13 are basically the same, but due to the need to nest with each other front and back, its cross-sectional dimensions gradually decrease from the platform door 9 towards the door 7. The cross-sectional dimension of the first telescopic shell connected to the door 7 is precisely matched with the magnetic attraction groove 21, and the cross-sectional dimension of the last telescopic shell at the platform door 9 is precisely matched with the reserved portal dimension of the tunnel lining 3 and is welded and fixed through the embedded L-shaped steel plate 136.

[0077] In addition, to make the telescopic movement of the telescopic channel 13 smoother, the present invention provides a circular groove 135 on 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 provided on the outer circular end face of the magnetic block ring 132, and a ball 133 is arranged in the circular groove 135. The size of the opening 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 housing moves forward or backward, the ball 133 rolls with the outer wall of the shell cylinder 138 as the rolling surface. The balls 133 can be evenly arranged at intervals of 30° to 45° along the circumferential direction.

[0078] In other embodiments, sealing materials 134 can be provided on the rear side of the end ring plate 137 and the front side of the magnet ring 132 of the U-shaped telescopic housing 131. Through epoxy resin bonding, while buffering, it can play a role in sealing the entire telescopic channel 13. When the telescopic channel 13 is in a fully stretched state, the sealing material 134 is effectively compressed, ensuring the airtightness of the channel. At the same time, after the channel extends in place, the balls 133 are located inside the sealing material 134 distributed along the circumferential direction, thus ensuring the airtightness requirements of the passenger channel. The sealing material 134 is continuously arranged along the circumferential direction, with a height of about 1 / 2 of the height of the magnet ring 132, and its thickness meets the requirements of being effectively compressed and the airtightness of the channel.

[0079] After the telescopic channel 13 contracts outward, it is nested section by section and enters the thickness range of the tunnel lining 3. A sealing door 33 is provided on the inner side of the tunnel lining 3. When the train is running, the telescopic channel 13 is fully contracted and can be received within the thickness range of the tunnel lining 3 and blocked by the sealing door 33, without affecting the train operation. A roller 35 and a suspension rail 34 are provided above the sealing door 33, and a roller 35 and a ground rail 36 are provided below. The upper and lower rollers 35 are driven to slide on the surfaces of the suspension rail 34 and the ground rail 36, prompting the sealing door 33 to translate until the telescopic channel 13 is completely covered. "V"-shaped tracks are provided at the contact positions of the suspension rail 34, the ground rail 36 and the roller 35.

[0080] The system of the present invention further includes an upper air cushion 11 and a lower air cushion 12. The upper air cushion 11 is located at the bottom inside the telescopic channel 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 channel 13 and can support the telescopic channel 13 after the telescopic channel 13 extends in place. The shapes of the upper air cushion 11 and the lower air cushion 12 match the profile and dimensions of the zigzag telescopic channel 13. The door 7, the telescopic channel 13, the upper air cushion 11, the lower air cushion 12, the platform door 9 and the platform slab 10 together constitute the boarding and alighting passage 8 for passengers.

[0081] The connections between the airtight ultra-high-speed train 2 and the door 7, and between the magnetic suction grooves 21 around the outside of the door opening position 72 and the telescopic channel 13, all need to meet the airtightness requirements.

[0082] Such as Figure 7 , when each telescopic housing of the telescopic channel extends in place, its total length should match the designed length of the channel. At the same time, a certain tensile force should be ensured along the length direction of the channel. On the one hand, it ensures that the sealing material at the front end of the telescopic housing is effectively compressed and airtight, and on the other hand, it ensures a certain stiffness and toughness in the length direction of the channel. Generally, it can be controlled by n×L 1 =L 2 -n×d (mm), where n is the number of sections of the telescopic housing, L 1 is the length of a single telescopic housing, L2 is the distance from the car door 7 to the platform screen door 9, and d is half of the thickness of the sealing material 134.

[0083] Since the airtight ultra-high-speed train 2 is mainly driven by electromagnetic force, the low-magnetic steel plates 32 embedded in the middle of the tunnel lining 3, the steel bars in the reinforced concrete 31, the embedded L-shaped steel plates 136 at the openings of the platform screen doors 9, and the steel materials such as the telescopic housing must all have low-magnetic properties.

[0084] In the above structure, low-magnetic steel plates 32, platform screen doors 9, telescopic housings, embedded L-shaped steel plates 136, closing doors 33, rollers 35, suspended rails 34, and ground rails 36 can all be made of Q345 steel. The reinforced concrete 31, bottom cushion layer 5, train tracks 6, and platform slabs 10 are all made of low-magnetic reinforced concrete. The sealing material 134 can be considered to be made of ethylene propylene diene monomer (EPDM) rubber and should have good flame retardancy.

[0085] Based on the concept of magnetic attraction control and free sliding, the present invention designs an airtight telescopic channel, which meets the quasi-vacuum environment required for train operation, realizes the normal pressure environment inside the train and the passenger passage, and solves the problem of safe boarding and alighting of passengers. It has the following structural characteristics:

[0086] 1. The channel system for connecting the low-vacuum tunnel ultra-high-speed train proposed by the present invention uses a three-dimensional telescopic housing as the basic unit, and sealing materials 134 and magnetic block rings 132 are respectively arranged at the front and rear ends. Through the mutual nesting of adjacent front and rear telescopic housings and the ball bearings 133 arranged at the contact parts, the free telescoping in the horizontal direction and the airtightness requirements of the telescopic channel 13 are realized.

[0087] 2. The stretching and retraction of the telescopic channel 13 are mainly realized through the interaction between the magnetic block ring 132 and the electromagnetic waves emitted in the magnetic attraction groove 21 on the outer side of the car door 7. The stability of the telescopic channel 13 mainly depends on the welding fixation between the last telescopic housing and the reserved L-shaped steel plate 136 of the tunnel lining 3 and the nesting constraint between adjacent front and rear segments.

[0088] 3. The airtightness of the telescopic channel 13 is mainly realized by the sealing performance of the sealing materials 134 at the ends of each telescopic housing in the compressed state. Therefore, the sealing material 134 is made of ethylene propylene diene monomer (EPDM) rubber with certain elasticity, and at the same time, it should be ensured that when the telescopic channel 13 is in the fully stretched state, an effective extrusion effect is formed on the sealing material 134 at the end.

[0089] 4. The fixed connection of the movable closing door 33 with the upper suspended rail 34 and the lower ground rail 36 meets the stability requirements under the action of the air pressure during the operation of the ultra-high-speed train.

[0090] The operation process of the above-mentioned channel system for connecting the low-vacuum tunnel ultra-high-speed train is specifically as follows:

[0091] S1: After the airtight 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.

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

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

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

[0096] S6: First open the platform door 9, then open the car door 7. The gas pressure in the telescopic channel 13 is consistent with the interior of the train and the station area, both of which are in a conventional atmospheric pressure state, and is effectively isolated from the low vacuum environment in the low vacuum tunnel 1. Passengers begin to get on and off the train.

[0097] S7: After the passengers have finished getting on and off the bus, the bus door 7 is closed first, and then the platform door 9 is closed, and the upper air cushion 11 is deflated and recovered.

[0098] The car door 7 and the platform door 9 are two doors that control the opening and closing of the passage. When the airtight super high-speed train 2 arrives at the station, the sealing door 33 is opened first, followed by the platform door 9 and the car door 7. When the airtight super high-speed train 2 leaves the station, the car door 7 is closed first, followed by the platform door 9, and the sealing door 33 is closed last and completely covers the contour range of the telescopic passage 13.

[0099] In the above process, after the airtight super high-speed train 2 stops at the station, the magnetic grooves 21 around the door 7 emit electromagnetic waves. According to the principle of opposites attract, under the mutual attraction of electromagnetic waves and the magnetic ring 132, the telescopic shell and the magnetic ring 132 are slowly released from the tunnel lining 3 with the help of the rolling of the ball 133, and are gradually sucked into the magnetic grooves 21 around the door. The telescopic channel 13 is extended to the maximum extent, and the sealing material 134 of the telescopic shell is effectively compressed, forming a relatively independent three-dimensional space whose airtightness meets the pressure difference of the gas inside and outside the channel. The inflation of the lower air cushion 12 below the channel is carried out synchronously with the extension of the telescopic shell, and the upper air cushion 11 above the channel is inflated last, forming a channel with stability that meets the requirements of passengers walking.

[0100] S8: The magnetic groove 21 emits reverse electromagnetic waves to repel the magnetic ring 132 of the telescopic channel 13, and the telescopic channel 13 shrinks outward and returns to the thickness range of the tunnel lining 3.

[0101] S9: The lower air cushion 12 deflates and retracts. The roller 35 rolls inside the upper suspension rail 34 and the lower ground rail 36, driving the movable sealing door 33 to slide horizontally until the telescopic channel portal is completely closed.

[0102] S10: The train starts, and its running speed gradually increases to the ultra-high speed state, and it drives towards the next station.

[0103] During the above process, electromagnetic waves with the same magnetism as the magnetic block ring 132 occur in the magnetic attraction grooves 21 around the car door 7. According to the principle of like repulsion, the telescopic shell of the telescopic channel 13 is gradually retracted backward, and finally hidden within the thickness range of the tunnel lining 3. Subsequently, the sealing door 33 is closed. Finally, the airtight ultra-high speed train 2 gradually starts, and the running speed gradually increases and runs towards the next station.

[0104] In addition, to ensure safe operation, an air intake system is provided at a certain distance above the channel in the present invention, which mainly consists of a control system 14, an air duct 15, an air intake pump 16, an air valve 17, etc. It is used to inflate the low-vacuum tunnel 1 to restore the normal pressure state in the case that the airtightness of the train or the telescopic channel does not meet the requirements or the airtightness is lost, and can effectively relieve various risks faced in the case of insufficient or partially lost airtightness. When it is detected that the airtightness of the channel is insufficient, the air valve 17 is opened through the control system 14, and the air intake pump 16 is used to inflate the tunnel in the first time, thereby restoring the normal pressure state in the tunnel.

[0105] The low-vacuum tunnel 1 involved in the present invention has the following construction process:

[0106] (1) According to the profile and dimensions required by the design, taking 1 - 2 m longitudinally as a unit, the low-magnetic steel plate 32 is manufactured. According to the overall stiffness and toughness requirements of the tunnel, the low-magnetic steel plate 32 can be made of Q345 steel, and the thickness is considered to be 5 - 10 mm;

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

[0108] (3) Shear pins are arranged on both sides of the low-magnetic steel plate 32 in a plum blossom shape, and rivets with a diameter of 5 mm and a spacing of 1 - 2 cm can be used;

[0109] (4) First, set up the formwork (including the bottom formwork, side formwork, and end formwork), tie the steel bars, and use the corresponding part of the low-magnetic steel plate 32 as the top formwork. Subsequently, pour the outer reinforced concrete of the tunnel inverted arch. After reaching the curing period, remove the formwork, and then pour the inner reinforced concrete of the inverted arch part. Subsequently, the tunnel linings of the lower left and lower right, upper left and upper right parts are completed in turn according to this;

[0110] (5) Reserve a hole at the position of the platform screen door 9, and set embedded L-shaped steel plates 136 at the upper and lower positions of the hole.

[0111] (6) Pour the bottom cushion layer 5 at the invert position of the low-vacuum tunnel 1 according to the train operation requirements.

[0112] (7) Pour the train track 6 above the tunnel bottom cushion layer 5 according to the design requirements, and its overall stiffness and flatness need to meet the train operation requirements.

[0113] (8) Set the platform screen door 9 outside the tunnel lining 3, and the bottom is connected to the platform slab 10.

[0114] (9) According to the size of the reserved hole in the tunnel lining 3 at the telescopic channel 13, make a movable sealing door 33 with a low-magnetic steel plate with a thickness of about 5 mm. Based on the horizontal sliding requirements, respectively set a suspension rail 34 and a ground rail 36 firmly connected to the reinforced concrete 31 at the top and bottom of the movable sealing door 33, and set rollers 35 at the contact positions of the movable sealing door 33 with the suspension rail 34 and the ground rail 36. "V"-shaped tracks are set at the contact positions of the rollers 35 with the suspension rail 34 and the ground rail 36.

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

[0116] S1: Prepare low-magnetic steel plates.

[0117] S2: According to the design requirements, based on the basic contour shape of the telescopic channel 13, roll a low-magnetic steel plate with a certain thickness into a shell cylinder 138 of various telescopic shells with a cross-section of a circular arch and straight wall shape, and weld steel plates with a smaller width into end ring plates 137 with different inner and outer radius sizes.

[0118] S3: Weld the end ring plate 137 to the shell cylinder 138, and paste the prefabricated magnetic block ring 132 and sealing material 134 (ethylene propylene diene monomer sealing material). The outside of the magnetic block ring 132 can also be wrapped with the end ring plate 137 according to the overall stiffness requirements.

[0119] S4: Weld the prefabricated circular groove 135 to the end ring plate 137, place the ball 133 in the circular groove 135 in advance, and perform an opening treatment on the middle position at the top of the magnetic block ring 132. The size of the circular groove 135 placed after opening should ensure that the ball 133 can roll freely but will not fall after being placed, thereby completing the production of the basic structural unit of the telescopic channel 13.

[0120] Such as Figure 4, the ball bearings 133 at the front end of the telescopic housing and the ball bearings 133 embedded in the surface of the rear magnetic block ring 132 are both installed by relying on the circular grooves 135. The opening size of the circular groove 135 is about 85% of the diameter of the ball bearing 133. However, at the same time, the diameter of the circular groove 135 is 1.1 times the diameter of the ball bearing 133, so as to effectively clamp the ball bearing 133 in the circular groove 135 and enable it to roll freely.

[0121] S5: According to the design requirements, telescopic housings with different cross-sectional dimensions are nested and assembled, and the L-shaped telescopic housing 1310 with the largest outer dimension is welded and anchored to the embedded L-shaped steel plate 136 of the tunnel lining 3. At the same time, it is ensured that the total length of all telescopic housings in the maximum contraction state ≤ the thickness of the tunnel lining 3, and the total length in the maximum extension state is accurately matched with the channel length dimension.

[0122] Such as Figure 3 , in the cross-sectional direction of the low-vacuum tunnel 1, the tunnel lining 3 has embedded L-shaped steel plates 136 at both ends of the upper and lower openings at the position of the platform screen door 9. To ensure the overall stability of the telescopic channel, the back of the last telescopic housing is welded and fixed to the embedded L-shaped steel plate 136 at the opening of the tunnel lining 3.

[0123] S6: According to the operating wind pressure, temperature of the airtight ultra-high-speed train 2 and their influences, the stability of the sealing door 33 mainly depends on the upper suspension rail 34 and the lower ground rail 36. The embedded steel plates in the tunnel lining 3 are used to weld and fix the suspension rail 34 and the ground rail 36.

[0124] S7: Air cushions that can be repeatedly cycled for inflation and deflation are arranged as required, namely the lower air cushion 12 below the bottom channel and the upper air cushion 11 above the bottom channel. After the upper air cushion 11 is fully inflated, its top needs to meet the flatness and stability requirements of the pedestrian passage.

[0125] The telescopic channel 13 proposed by the present invention is a ductile structure along its length direction. Its ductility is mainly achieved jointly by two air cushions and the "tie-in" between adjacent front and rear telescopic housings, which is essentially different from the conventional reinforced concrete channel structure. At the same time, there are two different states during the train's stopping at the station and operation to fully adapt to the engineering characteristics and actual needs of the low-vacuum tunnel ultra-high-speed train.

[0126] The method provided by the present invention needs to be noted during the implementation process:

[0127] 1. The operation of the ultra-high-speed train mainly relies on the maglev system. Therefore, for the steel materials involved, including various steel bars and steel plates, low-magnetic steel materials need to be used. Among them, the low-magnetic steel plate 32 in the tunnel lining 3 can be made of Q345 steel with a thickness of 5 - 10 mm. The main component of the telescopic channel 13, the telescopic housing, can be made of low-magnetic steel plate with a thickness of about 5 mm, and the sealing door 33 can also be made of low-magnetic steel plate with a thickness of about 5 mm;

[0128] 2. The running speed of the ultra-high-speed train is 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 rail 34 and the ground rail 36 for fixing the mobile 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 electromagnetic wave emission in both the forward and reverse directions and air supply in the low vacuum tunnel 1;

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

[0131] 5. When the telescopic shells of each section of the telescopic channel are fully extended, their length must comply with: n×L 1 =L 2 -n×d(mm), where n is the number of sections of the telescopic shell, L 1 is the length of a single telescopic shell, L 2 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 shells. 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 air tightness requirements of the channel must be met. At the same time, the embedded bite effect between the adjacent telescopic shells in 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 attraction control and free sliding", the present invention constructs a three-dimensional channel system that can freely expand and contract in the horizontal direction. The channel has a certain toughness and stiffness along its longitudinal direction, and has the overall stability for passengers to pass safely. During the high-speed operation of the train, the channel can be completely hidden within the thickness range of the tunnel lining, which can minimize the negative impact on the gas flow trajectory in the low-vacuum tunnel to the greatest extent;

[0137] 2) The telescopic channel that takes into account both "toughness" and overall stability mainly consists of a telescopic housing. The sealing materials and magnetic blocks at the front and rear ends of the housing can ensure the airtightness of the channel and the horizontal movement requirements; the free movement between the housings is mainly achieved through the balls arranged at the top and bottom of both ends. The balls are effectively fixed in the circular grooves, and the free rolling of the balls can be realized by controlling the size of the groove opening, but the balls cannot fall off;

[0138] 3) The telescopic housing directly connected to the magnetic attraction groove on the outer side around the car door, the height of the front magnetic block is about half of the height of the magnetic attraction groove. At the same time, the contour dimensions of both need to be precisely matched. Electromagnetic waves opposite or consistent with the magnetic block can be emitted in the magnetic attraction groove as needed to stretch or retract the channel;

[0139] 4) The low-vacuum tunnel (or pipeline) ultra-high-speed train connection channel system constructed by the present invention meets the requirements of on-site rapid and safe operation, as well as the needs of passengers to pass safely, greatly improves the on-site efficiency, and conforms to the green and low-carbon industry development trend. The solution idea is clear, the process is simple, and the construction is convenient, with high economic and social benefits, and has a wide application prospect in airtight channels involved in urban underground space development, maglev rail transit projects, etc.

[0140] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A channel system for connecting ultra-high-speed trains in a low-vacuum tunnel, characterized by: The system comprises a telescopic passage (13) arranged transversely, wherein the telescopic passage (13) is located in a low vacuum tunnel (1) and connected between a door (7) of an airtight ultra-high-speed train (2) and a platform door (9) arranged on a tunnel lining (3); The telescopic channel (13) comprises a plurality of Z-shaped telescopic shells (131) which are nested in sequence, and the vertical profile of the Z-shaped telescopic shells (131) gradually increases from the inside to the outside.

2. The low vacuum tunnel ultra-high speed train connection channel system according to claim 1, characterized in that: The Z-shaped telescopic housing (131) comprises an end ring plate (137), a housing 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 fixed inside the shell cylinder (138); The magnetic ring (132) is located at the outer end of the shell cylinder (138) and is fixed to the outside of the shell cylinder (138).

3. The low vacuum tunnel ultra-high speed train connection channel system according to claim 2, characterized in that: A U-shaped telescopic housing (131) is provided on the inner side of the telescopic channel (13), and the U-shaped telescopic housing (131) and the innermost Z-shaped telescopic housing (131) are nested with each other; The U-shaped telescopic housing (131) comprises a housing cylinder (138) and two magnetic rings (132); The two magnetic rings (132) are respectively located at the inner and outer ends of the shell tube (138) and outside the shell tube (138).

4. The low vacuum tunnel ultra-high speed train connection channel system according to claim 3, characterized in that: An L-shaped telescopic housing (1310) is provided on the outside of the telescopic channel (13), and the L-shaped telescopic housing (1310) and the outermost Z-shaped telescopic housing (131) are nested with each other; The L-shaped telescopic housing (1310) comprises an end ring plate (137) and a housing cylinder (138); The end ring plate (137) is located at the inner end of the shell cylinder (138) and is fixed inside the shell cylinder (138).

5. The low vacuum tunnel ultra-high speed train connection channel system according to claim 4, characterized in that: The inner circular end surface of the end ring plate (137) is provided with a circular groove (135), and a ball (133) is arranged in the circular groove (135); The outer circular end surface of the magnetic ring (132) is provided with a circular groove (135), and a ball (133) is arranged in the circular groove (135).

6. The low vacuum tunnel ultra-high speed train connection channel system according to claim 5, characterized in that: The outer periphery of the door (7) of the airtight ultra-high-speed train (2) is provided with a magnetic attraction groove (21) matching the contour of the U-shaped telescopic shell (131); After the telescopic channel (13) is extended from outside to inside, the magnetic ring (132) of the U-shaped telescopic housing (131) is sucked into the magnetic attraction groove (21), thereby connecting the telescopic channel (13) with the airtight super high-speed train (2).

7. The low vacuum tunnel ultra-high speed train connection channel system according to claim 6, characterized in that: An embedded L-shaped steel plate (136) is provided on the outer side of the tunnel lining (3), and the outer end of the shell cylinder (138) of the L-shaped telescopic shell (1310) is fixed to the embedded L-shaped steel plate (136).

8. The low vacuum tunnel ultra-high speed train connection channel system according to claim 7, characterized in that: After the telescopic channel (13) is retracted outwards, it is located within the thickness range of the tunnel lining (3), and a sealing door (33) is provided on the inner side of the tunnel lining (3).

9. The low vacuum tunnel ultra-high speed train connection channel system according to claim 8, 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).

10. The operating method of the low vacuum tunnel ultra-high speed train connection channel system according to claim 9, characterized in that: The method comprises: After the airtight super-high-speed train (2) stops at a station, the sealing door (33) is opened; The lower air cushion (12) is inflated; The magnetic attraction groove (21) emits electromagnetic waves to attract the magnetic ring (132) of the telescopic channel (13), and the telescopic channel (13) extends inward, and the magnetic ring (132) at the rear end of the previous telescopic housing is clamped and limited by the end ring plate (137) at the front end of the next telescopic housing, and finally nests in place; The magnetic ring (132) at the front end is sucked into the magnetic suction groove (21), and the telescopic channel (13) is sealed; The upper air cushion (11) is inflated to form a smooth passage for passengers to walk on; First open the platform door (9), then open the train door (7), and passengers begin to get on and off the train; After the passengers have finished getting on and off the bus, the bus door (7) is closed first, 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 ring (132) of the telescopic channel (13), so that the telescopic channel (13) contracts outward and returns to the thickness range of the tunnel lining (3); The lower air cushion (12) is deflated and recovered, and the sealing door (33) is closed; The airtight super high-speed train (2) is started.

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