Negative pressure energy storage and vacuum pipeline coupling system and method

Abstract

The present invention discloses a system and method for coupling negative pressure energy storage with a vacuum pipeline, belonging to the field of vacuum pipeline transportation technology. The system comprises a vacuum pipeline having an internal air pressure lower than an external air pressure and a potential energy conversion mechanism. The potential energy conversion mechanism comprises a conversion pipeline, an expander, a generator, and a conversion valve. The conversion valve is disposed on the conversion pipeline, one end of the conversion pipeline is connected to an interface component, and the other end of the conversion pipeline is connected to the outside of the vacuum pipeline. Each expander is disposed on the conversion pipeline, and each expander includes a rotating shaft connected to the generator. The expander is configured such that, when the negative pressure potential energy of the vacuum pipeline is released, a gas flow is formed in the conversion pipeline to drive the rotating shaft to rotate. The present invention provides a system and method for coupling negative pressure energy storage with a vacuum pipeline. The system can combine the structural characteristics of the vacuum pipeline to achieve efficient recovery of the negative pressure potential energy inside the vacuum pipeline during the pressure recovery process inside the vacuum pipeline, significantly reducing energy waste.

Description

Technical Field

[0001] The present invention belongs to the field of vacuum pipeline transportation technology, and in particular relates to a negative pressure energy storage and vacuum pipeline coupling system and method. Background Art

[0002] my country boasts a vast territory and a large population. With rapid socioeconomic development and rising living standards, the frequency of inter-city mobility and average mileage are increasing year by year, leading to a corresponding increase in the time cost of travel. In the existing transportation system, the operating speeds of high-speed rail and airplanes differ significantly. Vacuum tube rail transit can bridge the gap between the two, thereby improving travel efficiency.

[0003] A vacuum tube transportation system typically consists of vehicles, tracks, and a vacuum tube that completely encloses the vehicles and tracks. This tube provides the vehicles with an operating environment at a pressure lower than the ambient pressure. This reduces pressure and frictional resistance during high-speed vehicle movement, minimizing energy loss and noise pollution, ensuring the safety of passengers and equipment.

[0004] To create a low-pressure environment, under existing technical conditions, a vacuum pump is required to continuously extract the air from the vacuum pipe until the vacuum level inside the vacuum pipe reaches the level required for vehicle operation. Due to the large space inside a complete vacuum pipe, completing the vacuum pipe vacuuming operation often consumes a large amount of energy. In special circumstances such as pipeline or track maintenance, the air pressure in the vacuum pipe needs to be restored to normal atmospheric pressure to allow personnel to enter the vacuum pipe to inspect and maintain the internal structure and electromechanical equipment; after the maintenance is completed, the vacuum pipe needs to be vacuumed again. This reciprocating process usually results in a large waste of energy and reduces the economic benefits of the entire vacuum pipe transportation system. Summary of the Invention

[0005] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides a negative pressure energy storage and vacuum pipeline coupling system and method, which can combine the structural characteristics of the vacuum pipeline to achieve efficient recovery of the negative pressure potential energy inside the vacuum pipeline during the pressure recovery process inside the vacuum pipeline, significantly reduce energy waste in the pressure recovery process, and improve the economic benefits of the vacuum pipeline transportation system.

[0006] To achieve the above objectives, the present invention provides a negative pressure energy storage and vacuum pipeline coupling system for converting and storing negative pressure potential energy released in a vacuum pipeline, comprising:

[0007] A vacuum pipe, wherein the internal air pressure of the vacuum pipe is lower than the external air pressure of the vacuum pipe, so as to form negative pressure potential energy in the vacuum pipe; the vacuum pipe is provided with at least one interface member, each of which penetrates the pipe wall of the vacuum pipe and connects the inside and the outside of the vacuum pipe;

[0008] A potential energy conversion mechanism, comprising a conversion pipeline, at least one expander, a generator and a conversion valve;

[0009] The conversion valve is arranged on the conversion pipeline, one end of the conversion pipeline is connected to the interface component; the other end of the conversion pipeline is connected to the outside of the vacuum pipeline, and is used to controllably release the negative pressure potential energy in the vacuum pipeline;

[0010] Each of the expanders is arranged on the conversion pipeline, and each of the expanders includes a rotating shaft connected to the generator. The expander is configured so that when the negative pressure potential energy of the vacuum pipeline is released, a gas flow is formed in the conversion pipeline to drive the rotating shaft to rotate, thereby driving the generator to generate electricity.

[0011] As a further preferred embodiment of the present invention, the potential energy conversion mechanism further includes an energy storage component, which is connected to the generator and is used to store the electrical energy generated by the generator.

[0012] As a further preferred embodiment of the present invention, the potential energy conversion mechanism includes a first expander and a second expander, the rotating shafts of the first expander and the second expander are both connected to the rotating shaft of the generator, and the conversion pipeline is connected to the first expander and the second expander in sequence.

[0013] As a further preferred embodiment of the present invention, it further comprises an energizing mechanism, wherein the energizing mechanism comprises at least one energizing component, an energizing pipeline and a heat storage component;

[0014] Each of the energizing components is arranged on the conversion pipeline; each of the energizing components is connected to the heat storage component through the energizing pipeline, and the high-temperature heat exchange medium in the heat storage component flows into each of the energizing components through the energizing pipeline, so as to increase the enthalpy value of the gas flow in the conversion pipeline.

[0015] As a further preferred embodiment of the present invention, at least one first pressure pump is provided on the energizing pipeline for driving the circulation flow of the heat exchange medium.

[0016] As a further preferred embodiment of the present invention, the energizing mechanism further includes a heat collection pipeline and at least one heat collection component, each of the heat collection components is connected to the heat storage component through the heat collection pipeline, and each of the heat collection components collects heat energy from the outside of the vacuum pipe to increase the enthalpy value of the heat exchange medium in the heat storage component.

[0017] As a further preferred embodiment of the present invention, the energizing mechanism further includes a heat storage heat exchanger disposed between the energy storage component and the heat collection component. The heat storage heat exchanger is disposed on the heat collection pipeline and is used for heat energy exchange between the heat collection component and the heat storage component.

[0018] As a further preferred embodiment of the present invention, the heat collecting component includes one or more of a solar heat collecting component and a geothermal heat collecting component.

[0019] As a further preferred embodiment of the present invention, it also includes a potential energy generating mechanism, which includes a vacuum pipeline and at least one vacuum pump. Each of the vacuum pumps is connected to the interface component through the vacuum pipeline and is used for vacuuming the vacuum pipeline.

[0020] As a further preferred embodiment of the present invention, it further includes a rapid re-pressurization pipeline and a re-pressurization valve, wherein the re-pressurization valve is arranged on the rapid re-pressurization pipeline, and the rapid re-pressurization pipeline is connected to the interface component for rapid re-pressurization of the vacuum pipeline.

[0021] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0022] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0023] (1) The negative pressure energy storage and vacuum pipeline coupling system of the present invention forms a pipeline environment that meets the vehicle operation requirements by adopting a vacuum pipeline with an internal pressure lower than the external pressure. A number of interface components are provided on the corresponding vacuum pipeline so that the negative pressure potential energy inside the vacuum pipeline can be stably released through the interface components. At the same time, by connecting the potential energy conversion mechanism of the interface component and the conversion pipeline, at least one expander, generator and conversion valve included in the potential energy conversion mechanism, the gas flow formed by the release of the negative pressure potential energy in the vacuum pipeline can drive the generator to rotate and generate electricity through the expander, thereby realizing the recycling of the negative pressure potential energy in the vacuum pipeline, significantly improving the energy utilization rate of the vacuum pipeline transportation system, and realizing the green and environmentally friendly operation of the vacuum pipeline transportation system.

[0024] (2) The negative pressure energy storage and vacuum pipeline coupling system of the present invention adopts an energizing mechanism including at least one energizing component, an energizing pipeline and a heat storage component, so that the heat storage component can circulate the stored high-temperature heat exchange medium to the energizing component, so that the energizing component can transfer the heat energy in the high-temperature heat exchange medium to the gas flow, significantly improving the enthalpy value of the gas flow in the conversion pipeline, and further enabling the expander to significantly improve the power generation of the generator under the drive of the high-enthalpy gas flow, thereby realizing a stable and high-volume conversion of negative pressure potential energy to electrical energy in the vacuum pipeline.

[0025] (3) The negative pressure energy storage and vacuum pipeline coupling system and method of the present invention have a simple structure, stable operation and high conversion efficiency. By adopting a potential energy generating mechanism including a plurality of vacuum pumps and vacuum pipelines, the potential energy generating mechanism can realize efficient and comprehensive vacuuming of the air inside the vacuum pipeline, ensuring that the vacuum pipeline can maintain the vacuum degree required for train operation. At the same time, by setting up a plurality of expanders and conversion pipelines, during the gradual release of the negative pressure potential energy in the vacuum pipeline, the negative pressure potential energy of the vacuum pipeline is converted into mechanical energy of the expansion machine rotation through each expander and combined with a generator, and then the mechanical energy of the expander is converted into electrical energy generated by the generator, thereby completing the efficient conversion of the negative pressure potential energy of the vacuum pipeline. In addition, through the energy-enabling mechanism connected to the expander, the heat energy from the outside is collected by a heat collecting component, and then the heat energy is imparted to the gas flow in the conversion pipeline, thereby significantly increasing the enthalpy value in the gas flow and the power generation of the generator, which has high economic value and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the overall structure of the negative pressure energy storage and vacuum pipeline coupling system in an embodiment of the present invention;

[0027] Figure 2 This is a flow chart of a method for coupling negative pressure energy storage with a vacuum pipeline in an embodiment of the present invention;

[0028] Figure 3 This is a flow chart of a method for coupling negative pressure energy storage with a vacuum pipeline in another embodiment of the present invention.

[0029] In all the drawings, the same figure marks represent the same technical features, specifically: 1. vacuum pipe; 2. interface component; 3. vacuum gauge; 4. vacuum pipeline; 5. vacuum valve; 6. Roots pump; 7. screw pump; 8. conversion pipeline; 9. auxiliary motor; 10. first expander; 11. second expander; 12. generator; 13. conversion valve; 14. filter component; 15. energy storage component; 16. energizing pipeline; 17. preheater; 18. interstage heat exchanger; 19. heat storage component; 20. heat storage heat exchanger; 21. first booster pump; 22. second booster pump; 23. third booster pump; 24. energizing valve; 25. heat collection pipeline; 26. rapid re-pressurization pipeline; 27. re-pressurization valve; 28. excess airflow valve; 29. ​​heat collection component. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0031] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example:

[0033] See also Figure 1 The negative pressure energy storage and vacuum pipeline coupling system and method in the preferred embodiment of the present invention can be combined with the structural characteristics of the vacuum pipeline 1. During the pressure recovery process in the vacuum pipeline 1, it can achieve efficient recovery of the negative pressure potential energy inside the vacuum pipeline 1, significantly reduce the energy waste in the vacuum recovery process, and improve the economic efficiency of vacuum pipeline rail transit.

[0034] Specifically, in a preferred embodiment of the present application, the negative pressure energy storage and vacuum pipe coupling system includes a vacuum pipe 1 and a potential energy conversion mechanism. The internal air pressure of the vacuum pipe 1 is lower than the external air pressure of the vacuum pipe 1, that is, negative pressure potential energy relative to the outside is formed in the vacuum pipe 1. Preferably, the air pressure in the vacuum pipe 1 with negative pressure potential energy is 100Pa to 0.1MPa. At the same time, at least one interface component 2 is provided on the vacuum pipe 1, and each interface component 2 passes through the pipe wall of the vacuum pipe 1 to connect the inside and the outside of the vacuum pipe 1. Then, the stable release of the negative pressure potential energy inside the vacuum pipe 1 and the generation of negative pressure potential energy inside the vacuum pipe 1 can be achieved by providing at least one interface component 2 on the vacuum pipe 1.

[0035] The potential energy conversion mechanism includes a conversion pipeline 8, at least one expander, a generator 12, and a conversion valve 13. The conversion valve 13 is disposed on the conversion pipeline 8 and is used to control the opening or closing of the conversion pipeline 8. One end of the conversion pipeline 8 is connected to the interface component 2, and the other end is connected to the exterior of the vacuum pipeline 1. Each expander is disposed on the conversion pipeline 8, and the rotating shaft of each expander is connected to the rotating shaft of the generator 12. When the negative pressure potential energy in the vacuum pipeline 1 is released, a gas flow is formed in the conversion pipeline 8 that drives the expander's rotating shaft to rotate. The rotation of the expander's rotating shaft drives the rotating shaft of the generator 12, thereby generating rotational power. Furthermore, during the release of the negative pressure potential energy in the vacuum pipeline 1, the gas flow generated by the release of the negative pressure potential energy can be used to drive the generator 12 to generate electricity. This, while restoring the air pressure in the vacuum pipeline 1, can also convert the negative pressure potential energy in the vacuum pipeline 1 into electrical energy, significantly improving the utilization rate of the operating resources of the vacuum pipeline 1.

[0036] Furthermore, in a preferred embodiment of the present application, the expander includes a first expander 10 and a second expander 11, which are arranged in parallel and coaxially. The first expander 10 and the second expander 11 have their rotating shafts connected, or they share a common rotating shaft. Accordingly, a conversion line 8 connects the first expander 10 and the second expander 11 in sequence, i.e., the first expander 10 and the second expander 11 are connected in series to the conversion line 8, thereby fully utilizing the energy of the gas flow in the conversion line 8.

[0037] Of course, the first expander 10 and the second expander 11 can also be connected in parallel to the conversion pipeline 8, so that the conversion pipeline 8 provides air pressure to the first expander 10 and the second expander 11 simultaneously. In addition, the conversion pipeline 8 can also be divided into two conversion branches, with the first conversion branch connecting the first expander 10 and the second expander 11 in series and a first conversion branch valve provided on the first conversion branch; correspondingly, the second conversion branch connects the first expander 10 and the second expander 11 in parallel and a corresponding second conversion branch valve is provided.

[0038] In actual use, the opening and closing of the first and second conversion branch valves are adjusted according to the energy conditions of the gas flow. For example, when the gas flow has high-energy characteristics such as a fast flow rate and high temperature, the first conversion branch valve is closed and the second conversion branch valve is opened, allowing the high-energy gas flow to enter the first expander 10 and the second expander 11 simultaneously, thereby achieving high-speed conversion of energy in the high-energy gas flow into electrical energy. When the gas flow is low-energy, the second conversion branch valve is closed and the first conversion branch valve is opened, allowing the low-energy gas flow to pass through the first expander 10 and the second expander 11 in sequence, thereby fully utilizing the energy in the gas flow through the first expander 10 and the second expander 11, thereby improving the conversion rate of energy in the gas flow into electrical energy.

[0039] Of course, the arrangement of the expander, the motor, and the conversion pipeline 8 is not limited to the above-mentioned structural form. In another preferred embodiment of the present application, the expander includes a first expander 10 and a second expander 11. The first expander 10 and the second expander 11 are arranged in parallel, and the rotating shafts of the two expanders face the same direction. The gear transmission pair enables the motor shaft to cooperate with the rotating shaft of the first expander 10 and the rotating shaft of the second expander 11 for transmission, respectively. Then, in the process of the gas flow in the conversion pipeline 8 driving the expander shaft to rotate, the gear pair is used to drive the generator 12 to generate electricity.

[0040] Furthermore, in a specific preferred embodiment of the present application, the expander includes a first expander 10 and a second expander 11, which are connected in series to a conversion pipeline 8. Specifically, the first expander 10 and the second expander 11 each include at least one accommodating chamber, within which an impeller is disposed. The corresponding impeller is provided with an expansion inlet and an expansion outlet, and the rotating shaft of the impeller is connected to the rotating shaft of the motor. The first expansion inlet of the first expander 10 is directly connected to the exterior of the vacuum pipeline 1 through the conversion pipeline 8. The first expansion outlet of the first expander 10 and the second expansion inlet of the second expander 11 are connected through the conversion pipeline 8. The second expansion outlet of the second expander 11 is directly connected to the access component of the vacuum pipeline 1 through the conversion pipeline 8. As the negative pressure potential energy in the vacuum pipeline 1 is gradually released to the outside of the vacuum pipeline 1, the gas flow in the conversion pipeline 8 can drive the first expander 10 and the second expander 11 to move, thereby driving the motor to generate electricity, thereby converting the negative pressure potential energy in the vacuum pipeline 1 into electrical energy.

[0041] Further preferably, the expander does not only include the first expander 10 and the second expander 11, but multiple expanders can also be provided, using the above-mentioned arrangement and connection method of the conversion pipeline 8, which will not be repeated here.

[0042] Further preferably, in the preferred embodiment of the present application, in order to ensure that the expander can rotate stably under the drive of the gas flow, an auxiliary motor 9 is correspondingly provided at one end of the common rotating shaft of the first expander 10 and the second expander 11 arranged side by side, away from the generator 12. In actual use, the auxiliary motor 9 initially drives the impellers of the first expander 10 and the second expander 11 to rotate. After gradually adapting to the effect of the gas flow, the first expander 10 and the second expander 11 rotate stably under the drive of the gas flow, and then the auxiliary motor 9 is turned off, thereby ensuring that the first expander 10 and the second expander 11 can quickly adapt to the flow of the gas flow and improve the conversion efficiency of the negative pressure potential energy. Preferably, a gear box is provided between the auxiliary motor 9 and the expander shaft for matching the speed of the auxiliary motor 9 and then connecting it to the expander shaft.

[0043] In more detail, in a preferred embodiment of the present application, an energy storage component 15 is further provided corresponding to the generator 12 . Preferably, the energy storage component 15 is a battery or an external power grid, so as to stably store the electrical energy generated by the generator 12 .

[0044] Furthermore, in a preferred embodiment of the present application, a filter member 14 is provided at the end of the conversion line 8 facing away from the vacuum pipe 1 to filter the gas flow entering the conversion line 8. Preferably, a conversion valve 13 is also provided on the conversion line 8 to control whether the conversion line 8 is open or closed.

[0045] Furthermore, in a preferred embodiment of the present application, an excess gas flow valve 28 is provided at the end of the conversion line 8 facing the vacuum line 1. This valve is used to discharge excess gas flow when the gas flow in the conversion line 8 exceeds the flow rate required to restore the pressure in the vacuum line 1. Preferably, a muffler is also provided corresponding to the excess gas flow valve 28 to muffle the excess gas flow during the discharge process.

[0046] Further preferably, in the preferred embodiment of the present application, a quick re-pressurization pipeline 26 is further provided corresponding to the conversion pipeline 8. Preferably, a re-pressurization valve 27 is also provided on the quick re-pressurization pipeline 26. One end of the quick re-pressurization pipeline 26 is connected to the interface component 2 on the vacuum pipeline 1, and the other end is connected to the outside of the vacuum pipeline 1. Preferably, a filter component 14 is also provided on the quick re-pressurization pipeline 26 connected to the outside of the vacuum pipeline 1, so that when the vacuum pipeline 1 needs to be quickly re-pressurized, a large flow of gas flow can be provided to the vacuum pipeline 1.

[0047] Furthermore, in a preferred embodiment of the present application, the negative pressure energy storage and vacuum pipeline coupling system further includes an energizing mechanism, which includes at least one energizing component, an energizing pipeline 16, and a heat storage component 19. Each energizing component is disposed on the conversion pipeline 8. At the same time, each energizing component is connected to the heat storage component 19 via the energizing pipeline 16, so that the high-temperature heat exchange medium in the heat storage component 19 can flow into each energizing component through the energizing pipeline 16, thereby transferring the energy in the high-temperature heat exchange medium in the energizing component to the gas flow circulating in the transfer pipeline, thereby increasing the enthalpy value in the gas flow and significantly improving the power generation efficiency of the generator 12.

[0048] Further preferably, in a preferred embodiment of the present application, the energizing mechanism includes two energizing components, namely a preheater 17 and an interstage heat exchanger 18. The conversion pipeline 8 passes through the preheater 17 and the interstage heat exchanger 18 in sequence, that is, the preheater 17 and the interstage heat exchanger 18 are connected in series to the conversion pipeline 8; or, the preheater 17 and the interstage heat exchanger 18 are connected in parallel to the conversion pipeline 8. At the same time, the preheater 17 and the interstage heat exchanger 18 are arranged in parallel on the energizing pipeline 16; or, the preheater 17 and the interstage heat exchanger 18 are arranged in series on the energizing pipeline 16, and the other end of the energizing pipeline 16 is connected to the heat storage component 19, so that the high-temperature heat exchange medium in the heat storage component 19 can be stably transferred to the gas flow in the conversion pipeline 8. Preferably, at least one first boosting pump 21 is also provided on the energizing pipeline 16, and the first boosting pump 21 drives the circulation flow of the heat exchange medium in the energizing pipeline 16, so that the high-temperature heat exchange medium in the heat storage component 19 can quickly flow into the energizing component; the low-temperature heat exchange medium after heat exchange in the energizing component can also be driven by the first boosting pump 21 to flow back into the heat storage component 19, thereby realizing uniform and rapid energy conversion between the heat exchange medium and the gas flow, and significantly improving the power generation of the generator 12.

[0049] Further preferably, the preheater 17 and the interstage heat exchanger 18 each include at least one heat exchange cavity, the conversion pipeline 8 passes through the heat exchange cavity, and at the same time, the shell corresponding to the heat exchange cavity is provided with an inlet and an outlet of the energizing pipeline 16, so that the high-temperature heat exchange medium can completely fill the heat exchange cavity, so as to realize the heat exchange between the gas flow in the conversion pipeline 8 and the high-temperature heat exchange medium in the heat exchange cavity, increase the enthalpy value in the gas flow, and facilitate the generator 12 to achieve efficient power generation according to the gas flow in the high-temperature state.

[0050] In more detail, in a preferred embodiment of the present application, at least one energizing valve 24 is provided on the energizing pipeline 16 for regulating the heat exchange between the energizing pipeline 16 and the heat exchange component.

[0051] Furthermore, in a preferred embodiment of the present application, the energizing mechanism further includes a heat collection pipeline 25 and at least one heat collection component 29. Each heat collection component 29 is connected to the heat storage component 19 via the heat collection pipeline 25. Each heat collection component 29 collects heat energy from the outside of the vacuum pipe 1 and transports the heat from the entire pipe outside to the heat storage component 19 for storage via the heat collection pipeline 25, ensuring that the heat storage component 19 has sufficient high-temperature heat exchange medium. Preferably, the heat collection component 29 includes one or more of a solar heat collection component and a geothermal heat collection component.

[0052] Further preferably, in the preferred embodiment of the present application, a heat storage heat exchanger 20 is further provided between the heat collecting component 29 and the heat storage component 19. The structural form of the heat storage heat exchanger 20 is similar to the structure of the energy-giving component. One side of the heat storage heat exchanger 20 is connected to each heat collecting component 29 through a heat collection pipeline 25 to realize the aggregation of the thermal energy of the heat collecting component 29. The other side of the heat storage heat exchanger 20 is connected to the heat storage component 19 through the heat collection pipeline 25 to facilitate the transfer of the heat energy in the heat storage heat exchanger 20 to the heat storage component 19 for storage, thereby ensuring that there is sufficient high-temperature heat exchange medium in the heat storage component 19, thereby improving the energy recovery efficiency of the negative pressure energy storage and vacuum pipeline coupling system.

[0053] More specifically, in a preferred embodiment of the present application, at least one second enabling valve and at least one third enabling valve are distributed on the heat collection pipelines 25 on both sides of the thermal storage heat exchanger 20. Preferably, at least one second boosting pump 22 and at least one third boosting pump 23 are distributed on the heat collection pipelines 25 on both sides of the thermal storage heat exchanger 20.

[0054] Furthermore, in a preferred embodiment of the present application, the negative pressure energy storage and vacuum pipe coupling system also includes a potential energy generating mechanism, which includes a vacuum pipe 4 and at least one vacuum pump. The vacuum pipe 4 is connected to the interface component 2 of the vacuum pipe 1, and each vacuum pump is arranged on the vacuum pipe 4. Through the continuous operation of each vacuum pump, the gas in the vacuum pipe 1 is extracted with the help of the vacuum pipe 4 until the vacuum degree in the vacuum pipe 1 meets the operating requirements, thereby not only enabling the vehicle to drive safely in the vacuum pipe 1, but also enabling the storage of negative pressure potential energy in the vacuum pipe 1. Combined with the potential energy conversion mechanism, it can achieve efficient conversion of negative pressure potential energy to electrical energy, and then achieve resource recycling.

[0055] Further preferably, in a preferred embodiment of the present application, the potential energy generating mechanism includes at least one Roots pump 6 and at least one screw pump 7, which are used to achieve high-speed, high-vacuum evacuation of the vacuum pipe 1. Preferably, at least one vacuum valve 5 is also provided on the vacuum pipe 4 to control the conduction or sealing of the vacuum pipe 4.

[0056] Furthermore, in a preferred embodiment of the present application, at least one vacuum gauge 3 is provided on the vacuum pipe 1 for determining the vacuum degree in the vacuum pipe 1 .

[0057] Further preferably, in another preferred embodiment of the present application, a plurality of openable and closable sealing components are provided in the vacuum pipe 1 to divide the entire vacuum pipe 1 into a plurality of individually sealable sub-vacuum units. Each sub-vacuum unit is provided with at least two interface components 2, and the two interface components 2 are respectively connected to the potential energy generating mechanism and the potential energy conversion mechanism. In actual use, the effective sealing of a single sub-vacuum unit can be achieved by regulating the sealing components on both sides of the area that needs to be repaired. Thereafter, the negative pressure potential energy in the sub-vacuum unit is released by the potential energy conversion mechanism, and during the process of releasing the negative pressure potential energy, the negative pressure potential energy is converted into electrical energy until the negative pressure potential energy in the sub-vacuum unit is completely released, thereby allowing the operator to enter the corresponding sub-vacuum unit for maintenance work. After the operator completes the maintenance work, the sub-vacuum unit is evacuated by the potential energy generating mechanism, so that the sub-vacuum unit can ensure the vacuum degree of the sub-vacuum unit while forming the corresponding negative pressure potential energy. After the vacuum degree in the sub-vacuum unit meets the requirements, the sealing components on both sides of the sub-vacuum unit are opened to form a fully conductive vacuum pipe 1.

[0058] Furthermore, in a preferred embodiment of the present application, a high-speed maglev track or a superconducting maglev track is provided in the vacuum tube 1, and the vacuum tube 1 can provide the maglev train with an operating environment with low air resistance or no air resistance under a negative pressure state, thereby enabling the maglev train to maintain a high operating speed while ensuring the high efficiency of the maglev train operation.

[0059] Of course, in another preferred embodiment of the present application, an air cushion suspension vehicle can also be provided in the vacuum pipe 1. The vacuum pipe 1 can provide the air cushion suspension vehicle with a low air resistance or no air resistance operating environment under a negative pressure state, thereby enabling the air cushion suspension vehicle to maintain a high operating speed while ensuring high operating efficiency.

[0060] Furthermore, in a preferred embodiment of the present application, at least one monitoring sensor is provided corresponding to the vacuum pumping line 4, the conversion line 8, the first expander 10, the second expander 11, the energizing line 16, the preheater 17, the interstage heat exchanger 18, the heat storage component 19, the heat storage heat exchanger 20, the heat collection line 25, the rapid re-pressurization line 26, the heat collection line 25, and the heat collection component 29 for monitoring the operating parameters of the above components.

[0061] Furthermore, if Figure 2 As shown in , in a preferred embodiment of the present application, a method for coupling negative pressure energy storage with a vacuum pipeline is disclosed, which specifically includes the following steps:

[0062] S11. Calculate and set the allowable range of the re-pressurization working condition parameters for the negative pressure potential energy release of the vacuum pipeline 1;

[0063] S12, obtaining thermal parameters of each component in the current state;

[0064] S13, judging whether the current system state meets the working condition conditions defined by the working condition parameters based on the thermal parameters; if so, proceeding to step S14; if not, proceeding to step S17;

[0065] S14. Calculate the re-pressurization parameters of the vacuum pipeline 1 according to the re-pressurization working condition parameters, and determine whether the re-pressurization parameters of the vacuum pipeline meet the re-pressurization requirements; if so, proceed to step S15; if not, proceed to step S17.

[0066] S15. Control the conversion of negative pressure potential energy in the vacuum pipe 1 into electrical energy according to the re-pressurization working condition parameters, and determine in real time whether the pipe pressure in the vacuum pipe 1 reaches the predetermined pressure; if so, proceed to step S16; if not, proceed to step S11.

[0067] S16, completing power generation and energy storage and re-pressurization of vacuum pipeline 1;

[0068] S17 , completing the re-pressurization of the vacuum pipeline 1 through the rapid re-pressurization pipeline 26 .

[0069] More preferably, Figure 3 As shown in , in another preferred embodiment of the present application, a method for coupling negative pressure energy storage and vacuum pipelines using the above-mentioned negative pressure energy storage and vacuum pipeline coupling system is disclosed, specifically comprising the following steps:

[0070] S21. Calculate and set an allowable range of re-pressurization parameters for releasing negative pressure potential energy of the vacuum pipeline 1 according to the negative pressure state of the vacuum pipeline 1.

[0071] S22. Real-time monitoring and collection of thermal parameters of each component in its current state through various monitoring sensors.

[0072] S23. Determine whether the current system state meets the operating conditions defined by the operating parameters based on the thermal parameters; if so, proceed to step S24; if not, proceed to step S29.

[0073] S24. Calculate and predict the internal pressure, temperature, recovery pressure and recovery time of the vacuum pipeline 1 according to the pressure, temperature, gas flow and other conditions of the re-pressurization working condition parameters to obtain the re-pressurization parameters of the vacuum pipeline 1.

[0074] S25. Determine whether the re-pressurization parameters of the vacuum pipeline 1 meet the re-pressurization requirements; if so, proceed to step S26; if not, proceed to step S29.

[0075] S26 , controlling or maintaining the operation of the heat exchanger, expander, and generator 12 according to the re-pressurization operating condition parameters, and opening the valves on the conversion pipeline 8 , the energizing pipeline 16 , and the heat collection pipeline 25 .

[0076] S27. The pipeline pressure in the vacuum pipeline 1 is collected in real time using the vacuum gauge 3, and it is determined whether the vacuum pipeline 1 has reached a predetermined pressure; if so, the process proceeds to step S28; if not, the process proceeds to step S21.

[0077] S28, shut down the generator 12, complete the power generation and energy storage and the re-pressurization of the vacuum pipeline 1.

[0078] S29. Turn off the heat exchanger, expander and generator 12, and close the valves on the conversion pipeline 8, the energizing pipeline 16, and the heat collection pipeline 25; at the same time, open the re-pressurization valve 27 on the rapid re-pressurization pipeline 26.

[0079] S210, completing the re-pressurization of the vacuum pipeline 1.

[0080] Furthermore, in a preferred embodiment of the present application, before step S1 , it is determined whether a superior control instruction is received to determine whether it is necessary to start converting the negative pressure potential energy in the vacuum pipe 1 into power generation.

[0081] The negative pressure energy storage and vacuum pipeline coupling system and method of the present invention have a simple structure, stable operation, and high conversion efficiency. By employing a potential energy generating mechanism comprising several vacuum pumps and a vacuum evacuation pipeline 4, the potential energy generating mechanism can achieve efficient and comprehensive vacuuming of the air inside the vacuum pipeline 1, ensuring that the vacuum pipeline 1 maintains the vacuum level required for train operation. Furthermore, by providing multiple expanders and a conversion pipeline 8, during the gradual release of the negative pressure potential energy within the vacuum pipeline 1, each expander, in conjunction with a generator 12, converts the negative pressure potential energy of the vacuum pipeline 1 into mechanical energy generated by the expander rotation. This mechanical energy is then converted into electrical energy generated by the generator 12, thereby completing the efficient conversion of the negative pressure potential energy of the vacuum pipeline 1. Furthermore, through an energy-enhancing mechanism connected to the expander, a heat collection component 29 is used to collect external thermal energy, which is then transferred to the gas flow within the conversion pipeline 8. This significantly increases the enthalpy of the gas flow and the power generation of the generator 12, resulting in high economic value and widespread application prospects.

[0082] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A negative pressure energy storage and vacuum pipeline coupling system for converting negative pressure potential energy released in a vacuum pipeline into energy storage, characterized in that: include: A vacuum pipe, wherein the internal air pressure of the vacuum pipe is lower than the external air pressure of the vacuum pipe, so as to form negative pressure potential energy in the vacuum pipe; the vacuum pipe is provided with at least one interface member, each of which penetrates the pipe wall of the vacuum pipe and connects the inside and the outside of the vacuum pipe; A potential energy conversion mechanism, comprising a conversion pipeline, at least one expander, a generator and a conversion valve; The conversion valve is arranged on the conversion pipeline, one end of the conversion pipeline is connected to the interface component; the other end of the conversion pipeline is connected to the outside of the vacuum pipeline, and is used to controllably release the negative pressure potential energy in the vacuum pipeline; Each of the expanders is disposed on the conversion pipeline, and each of the expanders includes a rotating shaft connected to the generator. The expanders are configured such that, when the negative pressure potential energy of the vacuum pipeline is released, a gas flow is formed in the conversion pipeline to drive the rotating shaft to rotate, thereby driving the generator to generate electricity. A potential energy generating mechanism includes a vacuum pipeline and at least one vacuum pump. Each vacuum pump is connected to the interface component through the vacuum pipeline and is used for vacuuming the vacuum pipeline.

2. The negative pressure energy storage and vacuum pipeline coupling system according to claim 1, wherein: The potential energy conversion mechanism further includes an energy storage component, which is connected to the generator and is used to store the electrical energy generated by the generator.

3. The negative pressure energy storage and vacuum pipeline coupling system according to claim 1, wherein: The potential energy conversion mechanism includes a first expander and a second expander. The rotating shafts of the first expander and the second expander are both connected to the rotating shaft of the generator. The conversion pipeline is connected to the first expander and the second expander in sequence.

4. The negative pressure energy storage and vacuum pipeline coupling system according to any one of claims 1 to 3, wherein: Also included is an energizing mechanism, the energizing mechanism including at least one energizing component, an energizing pipeline, and a heat storage component; Each of the energizing components is arranged on the conversion pipeline; each of the energizing components is connected to the heat storage component through the energizing pipeline, and the high-temperature heat exchange medium in the heat storage component flows into each of the energizing components through the energizing pipeline, so as to increase the enthalpy value of the gas flow in the conversion pipeline.

5. The negative pressure energy storage and vacuum pipeline coupling system according to claim 4, wherein: At least one first pressure pump is provided on the energizing pipeline for driving the circulation flow of the heat exchange medium.

6. The negative pressure energy storage and vacuum pipeline coupling system according to claim 4, wherein: The energizing mechanism further includes a heat collection pipeline and at least one heat collection component. Each of the heat collection components is connected to the heat storage component through the heat collection pipeline. Each of the heat collection components collects heat energy from the outside of the vacuum pipe to increase the enthalpy value of the heat exchange medium in the heat storage component.

7. The negative pressure energy storage and vacuum pipeline coupling system according to claim 6, wherein: The energizing mechanism further includes a heat storage heat exchanger disposed between the heat storage component and the heat collecting component. The heat storage heat exchanger is disposed on the heat collecting pipeline and is used for heat energy exchange between the heat collecting component and the heat storage component.

8. The negative pressure energy storage and vacuum pipeline coupling system according to any one of claims 1 to 3 and 5 to 7, wherein: It also includes a fast re-pressurization pipeline and a re-pressurization valve. The re-pressurization valve is arranged on the fast re-pressurization pipeline. The fast re-pressurization pipeline is connected to the interface component and is used for fast re-pressurization of the vacuum pipeline.

9. A method for coupling negative pressure energy storage with a vacuum pipeline, characterized in that: The following steps are involved: S11. Calculate and set the allowable range of the re-pressurization working condition parameters for the release of negative pressure potential energy in the vacuum pipeline; S12, obtaining thermal parameters of each component in the current state; S13, judging whether the current system state meets the working condition defined by the working condition parameters according to the thermal parameters; if so, proceeding to step S14; if not, proceeding to step S17; S14, calculating the vacuum pipeline re-pressurization parameters according to the re-pressurization working condition parameters, and determining whether the vacuum pipeline re-pressurization parameters meet the re-pressurization requirements; if so, proceeding to step S15; if not, proceeding to step S17; S15, controlling the conversion of negative pressure potential energy in the vacuum pipeline into electrical energy according to the re-pressurization working condition parameters, and determining in real time whether the pipeline pressure in the vacuum pipeline reaches a predetermined pressure; if so, proceeding to step S16; if not, proceeding to step S11; S16, completing power generation and energy storage and repressurization of the vacuum pipeline; S17. Complete the re-pressurization of the vacuum pipeline through the rapid re-pressurization pipeline.

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