Train compartment oxygen generation and supply system

Abstract

The utility model relates to an oxygen generating and supplying system for a train compartment. Belongs to the technical field of railway train heating and ventilation special equipment, the technical field of railway sanitation guarantee special equipment and the technical field of railway vehicle special equipment. Comprising an air compressor unit, an air storage tank unit, a membrane separator assembly unit, an oxygen supply and distribution pipeline unit and a control system unit, the air compressor unit is connected with the air storage tank unit, the air storage tank unit is connected with the membrane separator assembly unit, and the membrane separator assembly unit is connected with the oxygen supply and distribution pipeline unit. The control system unit is respectively connected with the air compressor unit, the air storage tank unit, the membrane separator assembly unit and the oxygen supply and distribution pipeline unit. The oxygen-enriched membrane oxygen generating device adopts an oxygen-enriched membrane oxygen generating mode, the separation process is a physical process, and the oxygen-enriched membrane oxygen generating device has the advantages that the whole oxygen generating process is free of any chemical reaction, free of any additive and free of pollution waste, the production process is environment-friendly, and oxygen-enriched gas is pure.

Description

Technical Field

[0001] This utility model relates to an oxygen generation and supply system for train carriages; it belongs to the technical fields of railway train heating, ventilation and air conditioning equipment, railway health protection equipment, and railway vehicle equipment. Background Technology

[0002] In high-altitude areas, to reduce altitude sickness and improve the comfort of drivers and passengers, it is necessary to provide stable and continuous oxygen-enriched gas to rail transit carriages to meet their normal oxygen needs.

[0003] Therefore, a technical solution for installing an oxygen generation system in high-altitude rail transit was designed to enable rail transit vehicles to supply oxygen in high-altitude areas.

[0004] Currently, the existing oxygen production and supply systems in train carriages use imported membrane materials as core components. These are not dedicated oxygen production membranes, resulting in high gas consumption, high energy consumption, and insufficient oxygen supply for train use.

[0005] Therefore, providing a novel oxygen generation and supply system for train carriages, in which the entire oxygen generation process involves no chemical reactions, requires no additives, produces no pollution or waste, is environmentally friendly, and generates pure oxygen-enriched gas, has become an urgent technical challenge to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to provide a novel oxygen generation and supply system for train carriages. It selects membrane separation for oxygen generation and offers two oxygen supply modes: diffused oxygen generation and distributed oxygen supply. The system uses an oxygen-enriched membrane for oxygen generation, which separates oxygen and nitrogen using a polymer oxygen-enriched membrane. The separation process is a physical process, and the entire oxygen generation process involves no chemical reactions, requires no additives, produces no pollution or waste, and is environmentally friendly, resulting in pure oxygen-enriched gas.

[0007] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0008] An oxygen generation and supply system for train carriages includes an air compressor unit, an air storage tank unit, a membrane separator assembly unit, an oxygen supply and distribution pipeline unit, and a control system unit. The air compressor unit is connected to the air storage tank unit, the air storage tank unit is connected to the membrane separator assembly unit, the membrane separator assembly unit is connected to the oxygen supply and distribution pipeline unit, and the control system unit is connected to the air compressor unit, the air storage tank unit, the membrane separator assembly unit, and the oxygen supply and distribution pipeline unit.

[0009] Preferably, the air compressor unit includes an air supply line, an air filter, and a compressor; the air supply line is connected to the air filter, and the air filter is connected to the compressor.

[0010] Preferably, the air storage tank unit includes a vapor-water separator, an air buffer tank, a primary filter, a secondary filter, and a tertiary filter; the compressor in the air compressor unit is connected to the vapor-water separator, the vapor-water separator is connected to the air buffer tank, the air buffer tank is connected to the primary filter, the primary filter is connected to the secondary filter, and the secondary filter is connected to the tertiary filter.

[0011] Preferably, the three-stage filter is connected to the pre-membrane heater, and temperature transmitters are provided at both ends of the pre-membrane heater.

[0012] Preferably, the pre-membrane heater is connected to the membrane separator assembly unit, which includes an inlet valve, a membrane module, a permeate outlet, and a sludge outlet; the permeate outlet is located on the permeate side, and the sludge outlet is located on the sludge side.

[0013] Preferably, the membrane module is a hollow fiber membrane module, comprising a fiber tube, the two ends of which are bound with epoxy resin and encapsulated in a PVC shell.

[0014] Preferably, the oxygen supply and distribution pipeline unit includes an oxygen-enriched buffer tank, a distributed oxygen supply pipeline, a distributed oxygen supply control valve, a diffused oxygen supply pipeline, and a diffused oxygen supply control valve; the permeate outlet of the membrane separator assembly unit is connected to the oxygen-enriched buffer tank via a pipeline, the oxygen-enriched buffer tank is connected to the distributed oxygen supply outlet via the distributed oxygen supply pipeline and the distributed oxygen supply control valve, and the oxygen-enriched buffer tank is connected to the diffused oxygen supply outlet via the diffused oxygen supply pipeline and the diffused oxygen supply control valve.

[0015] Preferably, the control system unit includes one oxygen concentration probe built into the oxygen generation and supply system (oxygen generator), two oxygen concentration probes installed in the passenger room, and an oxygen generation and supply system control cabinet.

[0016] Preferably, the control system unit further includes an atmospheric pressure sensor, a pressure sensor, and a solenoid valve.

[0017] This utility model discloses a novel oxygen generation and supply system for train carriages, which adopts an oxygen-enriched membrane oxygen generation method. The principle is to use a polymer oxygen-enriched membrane to separate oxygen and nitrogen. The separation process is a physical process. Its advantages are that the entire oxygen generation process does not involve any chemical reaction, requires no additives, produces no pollution or waste, is environmentally friendly, and produces pure oxygen-enriched gas.

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the working principle of the oxygen generation and supply system in the train carriage in Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the operation process of the oxygen generation and supply system in the train carriage in Embodiment 1 of this utility model.

[0021] Main component names:

[0022] 1. Air filter 2. Compressor

[0023] 3. Gas-water separator 4. Air buffer tank

[0024] 5. Primary filter 6. Secondary filter

[0025] 7. Three-stage filter 8. Membrane preheater

[0026] 9. Membrane separator component unit 9-1 Inlet valve (raw material gas inlet A1)

[0027] 9-2 Membrane module (M01) 9-3 Permeate outlet (A1)

[0028] 9-4 Residual Gas Outlet (A2) Detailed Implementation

[0029] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of this utility model, but not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0030] Unless otherwise specified, in the following embodiments, all components are conventional components available on the market in this field, the connections between components are conventional connections, the software involved are conventional software in this field, and the methods are conventional methods in this field. Example

[0031] like Figure 1 The diagram shown is a schematic representation of the working principle of the oxygen generation and supply system in the train carriage of Embodiment 1 of this utility model; as shown... Figure 2The diagram shown is a schematic diagram of the operation process of the oxygen generation and supply system in the train carriage in Embodiment 1 of this utility model; wherein, 1 is an air filter, 2 is a compressor, 3 is a steam-water separator, 4 is an air buffer tank, 5 is a primary filter, 6 is a secondary filter, 7 is a tertiary filter, 8 is a pre-membrane heater, 9 is a membrane separator assembly unit, 9-1 is an air inlet valve (raw material gas inlet A1), 9-2 is a membrane module (M01), 9-3 is a permeate outlet (A1), and 9-4 is a stagnation gas outlet (A2).

[0032] The train carriage oxygen generation and supply system of Embodiment 1 of this utility model includes an air compressor unit, an air storage tank unit, a membrane separator assembly unit, an oxygen supply and distribution pipeline unit, and a control system unit. The air compressor unit is connected to the air storage tank unit, the air storage tank unit is connected to the membrane separator assembly unit, the membrane separator assembly unit is connected to the oxygen supply and distribution pipeline unit, and the control system unit is connected to the air compressor unit, the air storage tank unit, the membrane separator assembly unit, and the oxygen supply and distribution pipeline unit respectively.

[0033] The air compressor unit provides compressed air of a certain pressure and volume to the downstream system; it includes an air supply pipeline, an air filter 1, and a compressor 2; the air supply pipeline is connected to the air filter 1, and the air filter 1 is connected to the compressor 2.

[0034] The function of the air storage tank unit is to stabilize the pressure of compressed air and to allow the liquid (mainly water) in the compressed air to be separated and deposited. The liquid in the air buffer tank 4 is discharged from the tank at regular intervals by an automatic drain valve installed at the bottom of the tank. The air storage tank unit includes a steam-water separator 3, an air buffer tank 4, a primary filter 5, a secondary filter 6, and a tertiary filter 7. The compressor 2 in the air compressor unit is connected to the steam-water separator 3, the steam-water separator 3 is connected to the air buffer tank 4, and the air buffer tank 4 is connected to the tertiary filters F01 to F03, specifically as follows: the air buffer tank 4 is connected to the primary filter 5 (F01, 3u), the primary filter 5 (F01) is connected to the secondary filter 6 (F02, 0.01u), and the secondary filter 6 (F02) is connected to the tertiary filter 7 (F03, 0.01u).

[0035] The third-stage filter 7 (F03) in the three-stage filters F01-03 is connected to the pre-membrane heater 8. The pre-membrane heater 8 is an electric heater, and its function is to provide a good operating temperature for the membrane separator so that the membrane separator works in the best condition. Temperature transmitters are provided at both ends of the pre-membrane heater 8.

[0036] The pre-membrane heater 8 is connected to the membrane separator assembly unit 9. The membrane separator assembly unit 9 includes an inlet valve (raw material gas inlet A1) 9-1, a membrane module (M01) 9-2, a permeate outlet (A1) 9-3, and a sludge outlet (A2) 9-4. The inlet valve (raw material gas inlet A1) 9-1 is used to control the entry of compressed air into the membrane module. The membrane module (M01) 9-2 is a key core component of the oxygen production system. Under the condition of ensuring the compressed air flow rate, the amount of oxygen produced and the level of oxygen enrichment can be adjusted within a certain range by setting the operating pressure and temperature of the membrane module (M01) 9-2.

[0037] The membrane module (M01) 9-2 (separator) is a hollow fiber membrane module containing thousands of fiber tubes. Both ends of these fiber tubes are bound and sealed with epoxy resin, allowing gas to enter through a hole at one end and exit through a hole at the other. The fiber tube bundle is encapsulated in a PVC shell. Because oxygen and nitrogen in the air permeate at different rates within the fiber tubes, when compressed air enters the tubes, most of the gases with relatively high permeability, such as oxygen and water vapor, permeate through the tube wall and are collected per unit time, while nitrogen is output at the end of the tube. Compressed air reaching the rated minimum working pressure is introduced into the membrane separator through a shut-off valve. Gases with high permeability, such as oxygen and water, quickly permeate through the membrane wall and are enriched on the permeate side of the separator to produce oxygen-enriched gas with a concentration of 35-45%. Gases with low permeability, such as nitrogen and argon, are more difficult to permeate and are mostly retained without passing through the membrane, i.e., they are enriched on the stagnation side of the membrane. The nitrogen purity is generally 85-99%. After collection, it is discharged from the system as nitrogen-enriched gas and discharged into the atmosphere through a silencer under the carriage.

[0038] The oxygen supply and distribution pipeline unit includes an oxygen-enriched buffer tank, a distributed oxygen supply pipeline, a distributed oxygen supply control valve, a diffused oxygen supply pipeline, and a diffused oxygen supply control valve; the permeate outlet (A1) 9-3 in the membrane separator assembly unit 9 is connected to the oxygen-enriched buffer tank through a pipeline, the oxygen-enriched buffer tank is connected to the distributed oxygen supply outlet through the distributed oxygen supply pipeline and the distributed oxygen supply control valve, and the oxygen-enriched buffer tank is connected to the diffused oxygen supply outlet through the diffused oxygen supply pipeline and the diffused oxygen supply control valve.

[0039] The membrane separator assembly unit 9 is equipped with a nitrogen back pressure valve on the retention side to adjust the operating pressure of the membrane separator. The membrane separator assembly unit 9 is also equipped with a flow regulating valve on the retention side to adjust the output flow of the membrane separator. Once the pressure and flow are adjusted, the adjustment is automatic and no manual intervention is required. The air conditioning fresh air volume will be automatically adjusted and mixed before entering the vehicle to provide diffused oxygen.

[0040] The control system unit includes one oxygen concentration probe built into the oxygen generation and supply system (oxygen generator), two oxygen concentration probes installed in the passenger room, and the oxygen generation and supply system control cabinet.

[0041] In addition to the one oxygen concentration probe built into the oxygen generation and supply system itself, the train has two oxygen concentration probes installed in the passenger compartment. The signal source for controlling the working status of the oxygen generation and supply system is the two oxygen concentration probes in the passenger compartment. The oxygen generation and supply system collects this signal and transmits it to the oxygen generation and supply system control cabinet to control the fresh air volume of the air conditioning unit.

[0042] When the oxygen concentration probe in the passenger compartment detects that the oxygen concentration has reached a value higher than the preset upper limit, the oxygen generator immediately shuts off the compressed air entering the oxygen generator and issues an alarm signal. The air compressor is in an unloaded state, and the fresh air damper is opened accordingly.

[0043] When the smoke and fire alarm in the carriage sounds, the oxygen generator immediately stops working (the oxygen generator can be manually intervened to prevent it from stopping). When the air conditioning fan stops, the oxygen generator immediately stops working.

[0044] The network monitoring and data management of the oxygen supply system will be realized by the vehicle comprehensive monitoring system. The main control unit of the vehicle comprehensive monitoring system in the engineer's office will implement the central monitoring of the oxygen supply system of any car in the train formation.

[0045] Compressor 2 is equipped with overload, short circuit and phase loss protection. When compressor 2 starts, it first sends a start request signal. When it receives a start permission signal, it closes the compressor main circuit.

[0046] The test and diagnostic interface will have a parameter retention function system.

[0047] The control cabinet features automated oxygen production control, manual / automatic switching, monitoring, and fault protection.

[0048] The oxygen generation and supply system control cabinet of this utility model uses a PLC and a touch screen as controllers, and the system is integrated for control, which is simple to operate and reliable in control.

[0049] The control system unit of this utility model is also equipped with an atmospheric pressure sensor to detect altitude, and works in conjunction with the PLC system to centrally control the start and stop of the oxygen generator.

[0050] The control system unit of this utility model is also equipped with a pressure sensor to detect the intake pressure and ensure the stability of the pipeline pressure.

[0051] The control system unit of this utility model is also equipped with a solenoid valve to electronically drain the three-stage filter and ensure smooth drainage; the drainage function of the oxygen generation system is divided into start-up drainage, manual drainage, automatic drainage and stop-down drainage.

[0052] The control system is designed to allow users to set system parameters online, view system information and data, and receive prompts for system maintenance and alarms.

[0053] The working principle of the train carriage oxygen production and supply system of this utility model is as follows: the oxygen concentration in the carriage is controlled according to the corresponding altitude: when the oxygen concentration reaches the upper limit, the compressor is stopped and oxygen production is suspended; when the oxygen concentration is lower than the lower limit, the air compressor is restarted to produce oxygen; according to the scheme requirements, the upper and lower limits of oxygen concentration can typically be set between 23.5% and 25%.

[0054] The oxygen generator is equipped with a working mode selection switch, offering three modes: local control, centralized control, and stop. Its control logic is as follows: Figure 2 As shown:

[0055] Local control mode: When the operating mode selection switch is set to the local control position, the oxygen generator will start when the altitude is above 3000m and stop when the altitude is below 2800m; in local control mode, the oxygen generator will not receive network start or stop commands.

[0056] Centralized control mode: When the operating mode selection switch is set to the centralized control position, the network issues start / stop commands to control the oxygen generator to start and stop.

[0057] Stop method: Set the working mode selection switch to the stop position. The oxygen generator will stop after a delay.

[0058] The oxygen generators on high-altitude trains can be controlled entirely manually, without being controlled via the network.

[0059] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A train carriage oxygen generating and supplying system, characterized in that: It includes an air compressor unit, an air storage tank unit, a membrane separator assembly unit, an oxygen supply and distribution pipeline unit, and a control system unit; the air compressor unit is connected to the air storage tank unit, the air storage tank unit is connected to the membrane separator assembly unit, the membrane separator assembly unit is connected to the oxygen supply and distribution pipeline unit, and the control system unit is connected to the air compressor unit, the air storage tank unit, the membrane separator assembly unit, and the oxygen supply and distribution pipeline unit respectively.

2. The oxygen generating and supplying system for a train car according to claim 1, wherein The air compressor unit includes an air supply line, an air filter, and a compressor; the air supply line is connected to the air filter, and the air filter is connected to the compressor.

3. The oxygen generating and supplying system for a train car according to claim 2, wherein The air storage tank unit includes a steam-water separator, an air buffer tank, a primary filter, a secondary filter, and a tertiary filter; the compressor in the air compressor unit is connected to the steam-water separator, the steam-water separator is connected to the air buffer tank, the air buffer tank is connected to the primary filter, the primary filter is connected to the secondary filter, and the secondary filter is connected to the tertiary filter.

4. The oxygen generating and supplying system for a train car according to claim 3, wherein The three-stage filter is connected to the pre-membrane heater, and temperature transmitters are installed at both ends of the pre-membrane heater.

5. The oxygen generating and supplying system for a train car according to claim 4, wherein The pre-membrane heater is connected to the membrane separator assembly unit, which includes an inlet valve, a membrane module, a permeate outlet, and a sludge outlet; the permeate outlet is located on the permeate side, and the sludge outlet is located on the sludge side.

6. The oxygen generating and supplying system for a train car according to claim 5, wherein The membrane module is a hollow fiber membrane module, which includes a fiber tube. The two ends of the fiber tube are bound with epoxy resin and encapsulated in a PVC shell.

7. The oxygen generating and supplying system for a train car according to claim 6, wherein The oxygen supply and distribution pipeline unit includes an oxygen-enriched buffer tank, a distributed oxygen supply pipeline, a distributed oxygen supply control valve, a diffused oxygen supply pipeline, and a diffused oxygen supply control valve; the permeate outlet of the membrane separator assembly unit is connected to the oxygen-enriched buffer tank through a pipeline, the oxygen-enriched buffer tank is connected to the distributed oxygen supply outlet through the distributed oxygen supply pipeline and the distributed oxygen supply control valve, and the oxygen-enriched buffer tank is connected to the diffused oxygen supply outlet through the diffused oxygen supply pipeline and the diffused oxygen supply control valve.

8. The oxygen generating and supplying system for a train car according to claim 7, wherein The control system unit includes one oxygen concentration probe built into the oxygen generation and supply system itself, two oxygen concentration probes installed in the passenger room, and the oxygen generation and supply system control cabinet.

9. The oxygen generating and supplying system for a train car according to claim 8, wherein The control system unit also includes an atmospheric pressure sensor, a pressure sensor, and a solenoid valve.

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