Vacuum excrement collecting device for railway vehicle and fault detection method of vacuum excrement collecting device

Abstract

The invention provides a vacuum excrement collecting device for a railway vehicle and a fault detection method of the vacuum excrement collecting device, and relates to the technical field of vacuum excrement collection of the railway vehicle, and the vacuum excrement collecting device for the railway vehicle comprises a toilet stool arranged on a floor of the railway vehicle; the transfer box is arranged below a floor of the railway vehicle, and a sewage inlet of the transfer box is communicated with the toilet stool through a first pipeline so as to collect sewage in the toilet stool; the sewage box is arranged below the floor of the railway vehicle and communicates with the sewage outlet of the transfer box through a second pipeline, so that the transfer box transfers sewage in the transfer box into the sewage box under the pressurization effect; the waste water tank is arranged below the floor of the railway vehicle and communicated with the sewage inlet of the transfer tank through a third pipeline, and a waste water blow-down valve is arranged on the third pipeline and is opened in the process of transferring the sewage in the transfer tank into the sewage tank so as to release the pressure into the waste water tank and prevent the sewage in the transfer tank from being reversely sprayed to the toilet stool.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vacuum toilet systems for rail vehicles, and more particularly, to a vacuum toilet system for rail vehicles, a rail vehicle, and a fault detection method for a vacuum toilet system for rail vehicles. Background Art

[0002] In recent years, rail vehicles and the like are all equipped with vacuum toilet systems for collecting the dirt and wash wastewater of toilet bowls. Among them, the largest-scale vacuum toilet system is the transfer-type vacuum toilet system. The transfer-type structure of the vacuum toilet system has the advantages of high reliability, low requirement for pipeline sealing, small air consumption, fast response speed, and short waiting time for multiple toilet bowl uses. Similarly, the transfer-type vacuum toilet system also has defects such as too many control components, too many fault points, and low system cost performance.

[0003] Currently, since the transfer-type vacuum toilet systems in the prior art all use positive pressure to transfer dirt, pipeline blockage and reduced reliability of the toilet bowl sewage discharge components caused by untimely system maintenance occur simultaneously, which may cause the toilet bowl to backspray, seriously affecting the use of the sanitation system. Summary of the Invention

[0004] In view of this, in order to solve at least one of the technical problems in the prior art, the present disclosure provides a vacuum toilet system for rail vehicles and a fault detection method thereof, which can reduce or eliminate the risk of positive pressure backspray of the toilet bowl.

[0005] One aspect of the present disclosure provides a vacuum toilet system for rail vehicles, including: a toilet bowl disposed on the floor of the rail vehicle; a transfer tank disposed below the floor of the rail vehicle, an inlet of the transfer tank is communicated with the toilet bowl through a first pipeline to collect the dirt in the toilet bowl; a dirt tank disposed below the floor of the rail vehicle and communicated with a sewage outlet of the transfer tank through a second pipeline, so that the transfer tank transfers the dirt in the transfer tank to the dirt tank under the action of pressurization; and a wastewater tank disposed below the floor of the rail vehicle and communicated with the inlet of the transfer tank through a third pipeline, wherein a wastewater sewage valve is disposed on the third pipeline and is configured to open during the process of transferring the dirt in the transfer tank to the dirt tank to release the pressure into the wastewater tank, so as to avoid the dirt in the transfer tank from backspraying into the toilet bowl when the first pipeline is not tightly closed and / or the second pipeline is blocked.

[0006] According to some embodiments of the present disclosure, the drain outlet of the above wastewater tank is communicated with the outside of the above rail vehicle through an overflow pipeline. In the case where the first pipeline is not tightly closed and / or the second pipeline is blocked, the above wastewater drain valve is opened, so that the pressure in the first pipeline or the second pipeline is discharged to the outside of the above rail vehicle through the overflow pipeline for pressure relief and to prevent solid dirt from being discharged into the external environment.

[0007] According to some embodiments of the present disclosure, the above vacuum collection and disposal device further includes: a vacuum generating assembly disposed on the top of the above transfer tank, and the vacuum generating assembly is configured to establish a vacuum in the above transfer tank to suck the dirt in the above toilet into the above transfer tank.

[0008] According to some embodiments of the present disclosure, the above vacuum generating assembly includes: a vacuum switch, one end of the vacuum switch is connected to the positive pressure air source of the above rail vehicle, and the other end of the vacuum switch is connected to the top of the above transfer tank. The vacuum switch is configured to close when the vacuum degree in the above transfer tank is lower than a preset value; a vacuum generator, one end of the vacuum generator is connected to the positive pressure air source, and the other end of the vacuum generator is connected to the top of the above transfer tank, so that the pressure in the above transfer tank is less than the pressure in the above toilet, so as to suck the dirt in the above toilet into the above transfer tank.

[0009] According to some embodiments of the present disclosure, a toilet drain valve is provided on the drain outlet of the above toilet, and the toilet drain valve is configured to open after a vacuum is established in the above transfer tank, so that the dirt in the above toilet enters the above transfer tank under the action of the vacuum.

[0010] According to some embodiments of the present disclosure, a dirt discharge valve is provided on the above second pipeline, and the dirt discharge valve is configured to open when the dirt in the above transfer tank reaches a threshold liquid level. The above vacuum collection and disposal device further includes: a positive pressure application assembly, one end of the positive pressure application assembly is connected to the positive pressure air source, and the other end of the positive pressure application assembly is connected to the top of the above transfer tank. The positive pressure application assembly is configured to apply positive pressure to the above transfer tank through the positive pressure air source when the dirt discharge valve is opened to empty the above transfer tank.

[0011] According to some embodiments of the present disclosure, both the above first pipeline and the above third pipeline are communicated with the sewage inlet of the above transfer tank through a sewage inlet valve, and the sewage inlet valve is configured to close during the process of establishing a vacuum in the above transfer tank.

[0012] According to some embodiments of another aspect of the present disclosure, a rail vehicle is provided, including: a carriage, and the above vacuum collection and disposal device is disposed in the above carriage.

[0013] According to some embodiments of another aspect of the present disclosure, a fault detection method for a vacuum toilet collection device for a rail vehicle is provided, which is applied to the above-mentioned vacuum toilet collection device. The above-mentioned fault detection method includes: closing a plurality of toilet sewage discharge valves and sewage inlet valves, and opening the sewage discharge valve, applying positive pressure to the transfer tank through a positive pressure air source to empty the transfer tank; using a vacuum generating assembly to evacuate the above-mentioned transfer tank; opening the toilet sewage discharge valve or the wastewater sewage discharge valve, and determining that the above-mentioned sewage inlet valve is faulty when the vacuum switch signal disappearance time is not less than a preset time.

[0014] According to some embodiments of the present disclosure, when the above-mentioned sewage inlet valve is working properly, the above-mentioned fault detection method further includes: opening the above-mentioned sewage inlet valve, and sequentially closing one of the plurality of toilet sewage discharge valves, and determining whether the closed toilet sewage discharge valve is faulty; sequentially determining whether the plurality of toilet sewage discharge valves are faulty.

[0015] According to an embodiment of the present disclosure, a vacuum toilet collection device for a rail vehicle and its fault detection method, the toilet is arranged on the floor of the rail vehicle, the transfer tank is arranged under the floor of the rail vehicle, the sewage inlet of the transfer tank is communicated with the toilet through a first pipeline to collect the sewage in the toilet, the sewage tank is arranged under the floor of the rail vehicle and is communicated with the sewage discharge port of the transfer tank through a second pipeline, so that the transfer tank transfers the sewage in the transfer tank to the sewage tank under the action of pressurization, the wastewater tank is arranged under the floor of the rail vehicle and is communicated with the sewage inlet of the transfer tank through a third pipeline, a wastewater sewage discharge valve is arranged on the third pipeline, and the wastewater sewage discharge valve is configured to open during the process of transferring the sewage in the transfer tank to the sewage tank to release the pressure into the wastewater tank, so as to avoid the sewage in the transfer tank from spraying back to the toilet in the case of the first pipeline not being tightly closed and / or the second pipeline being blocked, and can reduce or eliminate the risk of positive pressure backspray of the toilet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Through the following description of the embodiments of the present disclosure with reference to the drawings, the above and other objects, features and advantages of the present disclosure will become clearer. In the drawings:

[0017] Figure 1 is a block diagram of a vacuum toilet collection device for a rail vehicle according to a schematic embodiment of the present disclosure;

[0018] Figure 2 is a partial enlarged view of part A in a vacuum toilet collection device for a rail vehicle according to a schematic embodiment of the present disclosure;

[0019] Figure 3 is a block diagram of a vacuum toilet collection device for a rail vehicle according to another schematic embodiment of the present disclosure;

[0020] Figure 4It is a block diagram of a vacuum toilet collection device for rail vehicles according to still another illustrative embodiment of the present disclosure;

[0021] Figure 5 It is a flowchart of a fault detection method for a vacuum toilet collection device for rail vehicles according to an illustrative embodiment of the present disclosure;

[0022] Figure 6 It is a flowchart of sub-steps of a fault detection method in the case where the sewage inlet valve is operating normally according to an illustrative embodiment of the present disclosure.

[0023] In the said drawings, the meanings of the reference numerals are specifically as follows:

[0024] 1. Toilet

[0025] 101. Toilet sewage discharge valve

[0026] 102. Button

[0027] 103. Flushing solenoid valve

[0028] 104. First sewage discharge solenoid valve

[0029] 105. Water pressure intensifying cylinder

[0030] 2. Transfer tank

[0031] 201. Sewage inlet valve

[0032] 3. Filth tank

[0033] 301. Filth discharge valve

[0034] 4. Wastewater tank

[0035] 401. Wastewater check valve

[0036] 402. Liquid level switch

[0037] 403. Negative pressure valve

[0038] 404. Wastewater discharge valve

[0039] 5. Vacuum switch

[0040] 6. Vacuum generator

[0041] 7. Vacuum valve

[0042] 8. Filter

[0043] 9. Sewage inlet solenoid valve

[0044] 10. Second sewage discharge solenoid valve

[0045] 11. Evacuation solenoid valve

[0046] 12. Pressure regulating valve;

[0047] 13. Transfer solenoid valve;

[0048] 14. First pressure switch;

[0049] 15. Filter pressure regulator;

[0050] 16. Pressure relief valve;

[0051] 17. Second pressure switch. Detailed implementation manners

[0052] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the following detailed description, for the sake of explanation, many specific details are set forth in order to provide a comprehensive understanding of the embodiments of the present disclosure. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0053] The terms used herein are merely for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising" and the like used herein indicate the presence of the described features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0054] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0055] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning usually understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include, but is not limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0056] To solve the problem of positive pressure backspray in the toilet, according to the inventive concept of one aspect of the present disclosure, the toilet is provided on the floor of the rail vehicle, the transfer tank is provided below the floor of the rail vehicle, the sewage inlet of the transfer tank is communicated with the toilet through a first pipeline to collect the sewage in the toilet, the sewage tank is provided below the floor of the rail vehicle and is communicated with the sewage outlet of the transfer tank through a second pipeline, so that the transfer tank transfers the sewage in the transfer tank to the sewage tank under the action of pressurization, the wastewater tank is provided below the floor of the rail vehicle and is communicated with the sewage inlet of the transfer tank through a third pipeline, a wastewater sewage valve is provided on the third pipeline, and the wastewater sewage valve is configured to open during the process of transferring the sewage in the transfer tank to the sewage tank to release the pressure into the wastewater tank, so as to avoid the sewage in the transfer tank from backspraying into the toilet when the first pipeline is not tightly closed and / or the second pipeline is blocked, and the risk of positive pressure backspray in the toilet can be reduced or eliminated.

[0057] To make the purpose, technical solution and advantages of the present disclosure clearer and more understandable, the following further describes the present disclosure in detail with reference to specific embodiments and the accompanying drawings.

[0058] Figure 1 It is a block diagram of a vacuum toilet collection device for a rail vehicle according to a schematic embodiment of the present disclosure. Figure 2 It is a partial enlarged view of part A in the vacuum toilet collection device for a rail vehicle according to a schematic embodiment of the present disclosure.

[0059] Embodiments of the present disclosure provide a vacuum toilet collection device for a rail vehicle, as Figure 1 and Figure 2 shown, including a toilet 1, a transfer tank 2, a sewage tank 3 and a wastewater tank 4. The toilet 1 is provided on the floor of the rail vehicle. The transfer tank 2 is provided below the floor of the rail vehicle, and the sewage inlet of the transfer tank 2 is communicated with the toilet 1 through a first pipeline to collect the sewage in the toilet 1. The sewage tank 3 is provided below the floor of the rail vehicle and is communicated with the sewage outlet of the transfer tank 2 through a second pipeline, so that the transfer tank 2 transfers the sewage in the transfer tank 2 to the sewage tank 3 under the action of pressurization. The wastewater tank 4 is provided below the floor of the rail vehicle and is communicated with the sewage inlet of the transfer tank 2 through a third pipeline. A wastewater sewage valve 404 is provided on the third pipeline, and the wastewater sewage valve 404 is configured to open during the process of transferring the sewage in the transfer tank 2 to the sewage tank 3 to release the pressure into the wastewater tank 4, so as to avoid the sewage in the transfer tank 2 from backspraying into the toilet 1 when the first pipeline is not tightly closed and / or the second pipeline is blocked.

[0060] According to an embodiment of the present disclosure, after a passenger finishes using the toilet 1, the button 102 is pressed to flush the toilet 1. The controller sends the signal sent by the button 102 to the flushing solenoid valve 103. After the flushing solenoid valve 103 receives the signal sent by the button 102 and is opened, water with a certain pressure is allowed to flow from the water tank into the toilet 1 to flush the inside of the toilet 1. During the flushing process, the water pressure intensifying cylinder 105 is adapted to increase the pressure of the water to ensure sufficient flushing force and better flushing effect. The water pressure intensifying cylinder 105 can adopt various forms such as air-water separation, air-water mixing, or an electric water pump, etc., which can boost the pressure of the flushing water. After the flushing is completed, the flushing solenoid valve 103 is disconnected and the water flow stops. When the solid dirt in the toilet 1 needs to be discharged, the toilet sewage discharge valve 101 is opened to discharge the solid dirt from the toilet 1, so that the solid dirt in the toilet 1 enters the transfer tank 2 under the action of vacuum.

[0061] According to an embodiment of the present disclosure, the waste water sewage discharge valve 404 can be closed with a delay after the process of transferring the dirt in the transfer tank 2 to the dirt tank 3, so as to release the pressure into the waste water tank 4.

[0062] According to an embodiment of the present disclosure, the toilet 1 is arranged on the floor of the rail vehicle, the transfer tank 2 is arranged under the floor of the rail vehicle, the sewage inlet of the transfer tank 2 is communicated with the toilet 1 through a first pipeline to collect the dirt in the toilet 1, the dirt tank 3 is arranged under the floor of the rail vehicle and is communicated with the sewage outlet of the transfer tank 2 through a second pipeline, so that the dirt in the transfer tank 2 is transferred to the dirt tank 3 under the action of pressurization. The waste water tank 4 is arranged under the floor of the rail vehicle and is communicated with the sewage inlet of the transfer tank 2 through a third pipeline. A waste water sewage discharge valve 404 is arranged on the third pipeline. The waste water sewage discharge valve 404 is configured to be opened during the process of transferring the dirt in the transfer tank 2 to the dirt tank 3 to release the pressure into the waste water tank 4, so as to avoid the dirt in the transfer tank 2 being sprayed back into the toilet 1 in the case that the first pipeline is not tightly closed and / or the second pipeline is blocked, prevent the superposition of multiple faults of positive pressure, and can reduce or eliminate the risk of positive pressure backspray of the toilet 1.

[0063] According to an embodiment of the present disclosure, the vacuum collection toilet device further includes a vacuum generating assembly. The vacuum generating assembly is arranged on the top of the transfer tank 2 and is configured to create a vacuum in the transfer tank 2 to suck the dirt in the toilet 1 into the transfer tank 2.

[0064] According to an embodiment of the present disclosure, the vacuum generating assembly can create a relatively high vacuum environment within the transfer tank 2, thereby generating a strong suction force to effectively suck the dirt in the toilet 1 into the transfer tank 2 quickly. Due to the effect of vacuum suction, the dirt in the toilet 1 can be more thoroughly removed, reducing the residue of dirt in the toilet 1 and keeping the toilet 1 clean. At the same time, the vacuum environment can reduce the odor emission of dirt during the suction process, reduce the peculiar smell in the carriage, and improve the comfort of passengers. Compared with the flushing toilet, creating a vacuum in the transfer tank 2 to suck the dirt in the toilet 1 into the transfer tank 2 does not require a large amount of water to flush the dirt, thereby saving water resources and also reducing the volume and weight of the water tank to meet the lightweight requirements of the rail vehicle and improve energy efficiency. Moreover, creating a vacuum in the transfer tank 2 to suck the dirt in the toilet 1 into the transfer tank 2 can adapt to the operating conditions of different rail vehicles, including high-speed driving and frequent starts and stops, and can maintain good working performance, ensuring the operating safety of the rail vehicle.

[0065] According to an embodiment of the present disclosure, the vacuum generating assembly includes a vacuum switch 5 and a vacuum generator 6. One end of the vacuum switch 5 is connected to the positive pressure air source of the rail vehicle, and the other end of the vacuum switch 5 is connected to the top of the transfer tank 2. The vacuum switch 5 is configured to close when the vacuum degree in the transfer tank 2 is lower than a preset value. One end of the vacuum generator 6 is connected to the positive pressure air source, and the other end of the vacuum generator 6 is connected to the top of the transfer tank 2, so that the pressure in the transfer tank 2 is less than the pressure in the toilet 1 to suck the dirt in the toilet 1 into the transfer tank 2.

[0066] According to an embodiment of the present disclosure, the vacuum generating assembly further includes a vacuum valve 7 and a filter 8. The vacuum valve 7 can precisely control the vacuum degree, and the filter 8 can filter solid particles and impurities in the air and only allow clean air to pass through. The combined use of the vacuum valve 7 and the filter 8 can protect the vacuum generator 6, prevent dust, impurities, and other solid particles from entering the pipeline interior, avoid pipeline blockage or damage to the transfer tank 2, and ensure the long-term reliability of the vacuum collection toilet device.

[0067] According to an embodiment of the present disclosure, a pressure sensor is provided on the vacuum switch 5. The pressure sensor is adapted to detect the vacuum degree inside the transfer tank 2 and transmit a signal to the vacuum switch 5. When the detected vacuum degree inside the transfer tank 2 is lower than a preset value, the vacuum switch 5 automatically closes and connects to the power supply. The evacuation solenoid valve 11 is opened, the vacuum valve 7 is opened, and the vacuum generator 6 starts to work to evacuate the transfer tank 2. When the vacuum degree inside the transfer tank 2 reaches the preset value, the vacuum switch 5 automatically disconnects and cuts off the power supply. The evacuation solenoid valve 11 is closed, the vacuum valve 7 is closed, and the vacuum generator 6 stops working. When the detected vacuum degree inside the transfer tank 2 is higher than the preset value, the vacuum switch 5 automatically disconnects and cuts off the power supply. The evacuation solenoid valve 11 is closed, the vacuum valve 7 is closed, and the vacuum generator 6 stops working to prevent damage to the transfer tank 2 and waste of energy caused by over-evacuation. When the detected vacuum degree inside the transfer tank 2 abnormally increases or decreases, the vacuum switch 5 can also cut off the power supply in time to prevent damage to the transfer tank 2. By adjusting the preset value of the vacuum switch 5, it can be ensured that the transfer tank 2 operates stably within a certain vacuum degree range, improving the efficiency of sewage treatment.

[0068] According to an embodiment of the present disclosure, the drain outlet of the wastewater tank 4 is communicated with the outside of the rail vehicle through an overflow pipeline equipped with a negative pressure valve 403. In the case where the first pipeline is not tightly closed and / or the second pipeline is blocked, the wastewater drain valve 404 is opened, so that the pressure in the first pipeline or the second pipeline is discharged to the outside of the rail vehicle through the overflow pipeline for pressure relief, and the negative pressure valve 403 is used to prevent solid pollutants from being discharged into the external environment.

[0069] According to an embodiment of the present disclosure, the diameter of the overflow pipeline needs to match that of the first pipeline and the second pipeline to ensure that the pressure in the first pipeline or the second pipeline can be smoothly released and reduce the residual pressure in the first pipeline or the second pipeline.

[0070] According to an embodiment of the present disclosure, a liquid level switch 402 is provided inside the wastewater tank 4. When the wastewater liquid level in the wastewater tank 4 reaches the set height of the liquid level switch 402, the liquid level switch 402 of the wastewater tank 4 is turned on and sends a signal to the controller. The controller performs an operation to empty the wastewater tank 4, controls the wastewater drain valve 404 to open, and transfers the wastewater into the transfer tank 2.

[0071] According to an embodiment of the present disclosure, when the first pipeline is not tightly closed (for example, not tightly closed due to a malfunction of the sewage inlet valve 201), the vacuum established by the vacuum generating assembly in the transfer tank 2 will leak through the first pipeline, and the wastewater drain valve 404 is opened, so that the pressure in the first pipeline is discharged to the outside of the rail vehicle through the overflow pipeline of the wastewater tank 4 for pressure relief. When the second pipeline is blocked, the process of transferring the dirt in the transfer tank 2 to the dirt tank 3 under the action of pressurization will be blocked. At this time, the sewage inlet valve 201 and the wastewater drain valve 404 are opened, so that a part of the solid dirt will enter the wastewater tank 4 through the third pipeline from the sewage inlet of the transfer tank 2 under the action of pressurization, so that the pressure in the second pipeline is released into the wastewater tank 4, and then discharged to the outside of the rail vehicle through the overflow pipeline of the wastewater tank 4 for pressure relief, avoiding the dirt in the transfer tank 2 from being sprayed back to the toilet 1, and avoiding the solid dirt from being discharged into the external environment, maintaining the cleanliness and hygiene of the carriage of the rail vehicle. At the same time, when the overflow pipeline overflows, it can be used as a fault indication to prompt the maintenance personnel to check whether the first pipeline is not tightly closed and / or whether the second pipeline is blocked, facilitating the maintenance personnel to quickly locate the fault and repair it in time, reducing the maintenance cost.

[0072] According to an embodiment of the present disclosure, a negative pressure valve 403 is provided on the wastewater pipeline between the wastewater tank 4 and the outside of the rail vehicle. When the internal negative pressure of the wastewater tank 4 exceeds the set value, the diaphragm in the negative pressure valve 403 is pushed under the action of the internal and external pressure difference formed between the inside of the wastewater tank 4 and the outside of the rail vehicle, and the negative pressure valve 403 is opened, and external air enters the wastewater tank 4, thereby balancing the internal and external pressure difference and preventing the internal negative pressure of the wastewater tank 4 from being too high.

[0073] According to an embodiment of the present disclosure, a wastewater check valve 401 is provided on the wastewater pipeline between the wastewater tank 4 and the toilet 1. The wastewater tank 4 can collect the wastewater in the toilet 1 through the pipeline between the wastewater tank 4 and the toilet 1, and the fluid pressure of the wastewater pushes the valve flap in the wastewater check valve 401 to move, and at this time the wastewater check valve 401 is opened. At the same time, when the second pipeline is blocked, when a part of the solid dirt enters the wastewater tank 4 through the third pipeline from the sewage inlet of the transfer tank 2 under the action of pressurization, the valve flap in the wastewater check valve 401 does not move under the action of the elastic member at this time, and the wastewater check valve 401 is closed to prevent the solid dirt from being sprayed back to the toilet 1 through the pipeline between the wastewater tank 4 and the toilet 1.

[0074] According to an embodiment of the present disclosure, a toilet sewage valve 101 is provided at the sewage outlet of the toilet 1. The toilet sewage valve 101 is configured to be opened after a vacuum is established in the transfer tank 2, so that the dirt in the toilet 1 enters the transfer tank 2 under the action of the vacuum.

[0075] According to an embodiment of the present disclosure, when solid waste in the toilet 1 needs to be discharged, the controller controls the toilet sewage valve 101 to open through the first sewage solenoid valve 104, discharges the solid waste from the toilet 1, so that the solid waste in the toilet 1 enters the transfer tank 2 under the action of vacuum.

[0076] According to an embodiment of the present disclosure, a sewage discharge valve 301 is provided on the second pipeline. The sewage discharge valve 301 is configured to open when the sewage in the transfer tank 2 reaches the threshold liquid level. The vacuum toilet collection device further includes a positive pressure application component. One end of the positive pressure application component is connected to a positive pressure air source, and the other end of the positive pressure application component is connected to the top of the transfer tank 2. The positive pressure application component is configured to apply positive pressure into the transfer tank 2 through the positive pressure air source to empty the transfer tank 2 when the sewage discharge valve 301 is open.

[0077] According to an embodiment of the present disclosure, the controller controls the opening and closing of the sewage discharge valve 301 through the second sewage solenoid valve 10. When the sewage discharge in the transfer tank 2 reaches a certain number of times or the sewage reaches the set liquid level, the controller controls the transfer tank 2 to transfer the sewage in the transfer tank 2 to the sewage tank 3 under the action of pressurization through the transfer solenoid valve 13. Different output pressures of the positive pressure air source can be set by adjusting the pressure regulating valve 12.

[0078] According to an embodiment of the present disclosure, the positive pressure application component includes a first pressure switch 14 and a filter pressure regulator 15. The first pressure switch 14 is suitable for monitoring the pressure in the air circuit and opening or closing the supply of the positive pressure air source according to the pressure in the air circuit. At the same time, different pressure thresholds can be set by adjusting the first pressure switch 14. The filter pressure regulator 15 is suitable for purifying the positive pressure air source and maintaining a stable output pressure. The cooperation of the first pressure switch 14 and the filter pressure regulator 15 can ensure that the positive pressure air source operates within a safe working range, and ensure that the rail vehicle can maintain reliability and efficiency under complex and changeable operating conditions.

[0079] According to an embodiment of the present disclosure, both the first pipeline and the third pipeline are communicated with the sewage inlet of the transfer tank 2 through the sewage inlet valve 201. The sewage inlet valve 201 is configured to close during the process of establishing a vacuum in the transfer tank 2.

[0080] According to an embodiment of the present disclosure, the controller controls the opening and closing of the sewage inlet valve 201 through the sewage inlet solenoid valve 9.

[0081] According to an embodiment of the present disclosure, the sewage inlet valve 201 is closed during the process of establishing a vacuum in the transfer tank 2, avoiding sucking the dirt in the toilet 1 when the transfer tank 2 does not reach a complete vacuum environment, so that the dirt in the toilet 1 is not completely sucked into the transfer tank 2. The sewage inlet valve 201 is opened after the vacuum is established in the transfer tank 2. At the moment when the sewage inlet valve 201 is opened, the pressure in the transfer tank 2 is less than the pressure in the toilet 1, so as to completely suck the dirt in the toilet 1 into the transfer tank 2.

[0082] According to an embodiment of the present disclosure, during the process of the positive pressure applying assembly applying positive pressure to the transfer tank 2 through a positive pressure air source to empty the transfer tank 2, when the sewage inlet valve 201 is not tightly closed when receiving a closing signal due to its own failure (how to judge the failure of the sewage inlet valve 201 is described in detail later), the pressure in the first pipeline is released into the wastewater tank 4 through the third pipeline, and is discharged to the outside of the rail vehicle through the overflow pipeline of the wastewater tank 4 for pressure relief. At the same time, solid dirt will overflow through the not tightly closed sewage inlet valve 201 and flow into the wastewater tank 4 through the wastewater drain valve 404. A part of the positive pressure in the transfer tank 2 will also be discharged through the sewage inlet valve 201 and the wastewater drain valve 404, released into the wastewater tank 4, and discharged to the outside of the rail vehicle through the overflow pipeline of the wastewater tank 4 for pressure relief, avoiding the discharge of solid dirt into the external environment.

[0083] Figure 3 It is a block diagram of a vacuum toilet collection device for a rail vehicle according to another schematic embodiment of the present disclosure.

[0084] According to an embodiment of the present disclosure, as Figure 3 shown, a pressure relief valve 16 can be provided on the first pipeline. The pressure relief valve 16 is configured to open during the process of transferring the dirt in the transfer tank 2 to the dirt tank 3, so as to release the pressure into the wastewater tank 4, avoiding the dirt in the transfer tank 2 from spraying back into the toilet 1 in the case where the first pipeline is not tightly closed and / or the second pipeline is blocked. The pressure relief valve 16 can also be replaced by a check valve.

[0085] According to an embodiment of the present disclosure, if the vacuum toilet collection device does not have a wastewater tank 4, a positive pressure relief valve can be provided on the first pipeline to avoid the dirt in the transfer tank 2 from spraying back into the toilet 1 in the case where the first pipeline is not tightly closed and / or the second pipeline is blocked. The positive pressure relief valve can also be replaced by the pressure relief valve 16 or a check valve.

[0086] Figure 4 It is a block diagram of a vacuum toilet collection device for a rail vehicle according to still another schematic embodiment of the present disclosure.

[0087] According to an embodiment of the present disclosure, as Figure 4As shown, a second pressure switch 17 may be provided on the first pipeline. The second pressure switch 17 is adapted to monitor whether there is positive pressure in the first pipeline. The second pressure switch 17 is configured to be turned on during the process of transferring the dirt in the transfer tank 2 to the dirt tank 3 and turned off after the pressure is released.

[0088] According to an embodiment of another aspect of the present disclosure, there is provided a rail vehicle, which includes a carriage, and the above-mentioned vacuum toilet collection device is arranged in the carriage.

[0089] According to an embodiment of the present disclosure, the toilet 1 in the vacuum toilet collection device is arranged on the floor of the carriage, the transfer tank 2 in the vacuum toilet collection device is arranged below the floor of the carriage, the dirt tank 3 in the vacuum toilet collection device is arranged below the floor of the carriage, and the wastewater tank 4 in the vacuum toilet collection device is arranged below the floor of the carriage. The sewage inlet of the transfer tank 2 is communicated with the toilet 1 through a first pipeline to collect the dirt in the toilet 1. The dirt tank 3 is communicated with the sewage outlet of the transfer tank 2 through a second pipeline, so that the transfer tank 2 transfers the dirt in the transfer tank 2 to the dirt tank 3 under the action of pressurization. The wastewater tank 4 is communicated with the sewage inlet of the transfer tank 2 through a third pipeline. A wastewater sewage valve 404 is arranged on the third pipeline. The wastewater sewage valve 404 is opened during the process of transferring the dirt in the transfer tank 2 to the dirt tank 3 to release the pressure into the wastewater tank 4, avoiding the dirt in the transfer tank 2 from being backsprayed into the toilet 1 in the case that the first pipeline is not tightly closed and / or the second pipeline is blocked, and being able to reduce or eliminate the risk of positive pressure backspray of the toilet 1.

[0090] Figure 5 It is a flowchart of a fault detection method for a vacuum toilet collection device for a rail vehicle according to a schematic embodiment of the present disclosure.

[0091] According to an embodiment of another aspect of the present disclosure, as Figure 5 shown, there is provided a fault detection method for a vacuum toilet collection device for a rail vehicle, which is applied to the above-mentioned vacuum toilet collection device. The fault detection method includes the following steps S1 to step S3.

[0092] Step S1: Close a plurality of toilet sewage valves 101 and sewage inlet valves 201, open the dirt discharge valve 301, and apply positive pressure to the transfer tank 2 through a positive pressure air source to empty the transfer tank 2.

[0093] According to an embodiment of the present disclosure, the transfer tank 2 is emptied to ensure the maximum vacuum volume in the transfer tank 2 and improve the accuracy of fault detection.

[0094] Step S2: Use the vacuum generating assembly to evacuate the transfer tank 2.

[0095] According to an embodiment of the present disclosure, after the vacuum switch is triggered, the vacuum pumping stops after a predetermined time delay, and the sewage inlet valve 201 is closed. The predetermined time is set to be more than 1.5 times the output time of the vacuum switch, so that a relatively high vacuum degree is achieved in the transfer tank 2, improving the accuracy of fault detection.

[0096] Step S3: Open the toilet sewage discharge valve 101 or the wastewater sewage discharge valve 404. When the disappearance time of the vacuum switch signal is not less than the preset time, it is determined that the sewage inlet valve 201 is faulty.

[0097] According to an embodiment of the present disclosure, the preset time can be 0.15 s or 0.2 s. By extending the vacuum pumping time, the fault of the sewage inlet valve 201 can be judged. Opening one or more toilet sewage discharge valves 101 or the wastewater sewage discharge valve 404 can accelerate the reduction of the vacuum degree and reduce the time for judging the fault of the sewage inlet valve 201.

[0098] Figure 6 It is a flowchart of sub-steps of a fault detection method in the case of normal operation of the sewage inlet valve 201 according to an illustrative embodiment of the present disclosure.

[0099] According to an embodiment of the present disclosure, as Figure 6 shown, in the case of normal operation of the sewage inlet valve 201, the fault detection method further includes the following steps S4 to S5.

[0100] Step S4: Open the sewage inlet valve 201 and sequentially close one of the multiple toilet sewage discharge valves 101, and judge whether the closed toilet sewage discharge valve 101 is faulty.

[0101] Step S5: Sequentially judge whether multiple toilet sewage discharge valves 101 are faulty.

[0102] According to an embodiment of the present disclosure, the frequency of fault detection can be timed, fixed, or appropriately increased according to the aging of components, so as to detect component faults in time for maintenance and extend the service life of components.

[0103] The above describes the embodiments of the present disclosure. However, these embodiments are only for illustrative purposes and not for limiting the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should all fall within the scope of the present disclosure.

Claims

1. A vacuum feces collection device for rail vehicles, characterized in that: include: Toilets, which are installed on the floor of rail vehicles; A transfer box is arranged under the floor of the rail vehicle, and a sewage inlet of the transfer box is connected with the toilet through a first pipeline to collect sewage in the toilet; A dirt box, arranged under the floor of the rail vehicle and connected to the sewage outlet of the transfer box through a second pipeline, so that the transfer box transfers the dirt in the transfer box to the dirt box under the action of pressure; as well as A wastewater tank is arranged under the floor of the rail vehicle and is connected to the sewage inlet of the transfer box through a third pipeline, wherein the third pipeline is provided with: The wastewater drain valve is configured to open during the process of transferring the waste in the transfer box to the waste tank to release the pressure into the wastewater tank, thereby preventing the waste in the transfer box from spraying back into the toilet when the first pipeline is not tightly closed and / or the second pipeline is blocked.

2. The vacuum feces collecting device according to claim 1, characterized in that: The drain outlet of the wastewater tank is connected to the outside of the rail vehicle through an overflow pipe. When the first pipe is not closed tightly and / or the second pipe is blocked, the wastewater drain valve is opened, so that the pressure in the first pipe or the second pipe is discharged to the outside of the rail vehicle through the overflow pipe to release the pressure and prevent solid waste from being discharged into the external environment.

3. The vacuum feces collecting device according to claim 2, characterized in that: Also includes: A vacuum generating assembly is arranged on the top of the transfer box, and the vacuum generating assembly is configured to establish a vacuum in the transfer box so as to suck the waste in the toilet into the transfer box.

4. The vacuum feces collecting device according to claim 3, characterized in that: The vacuum generating assembly comprises: A vacuum switch, one end of which is connected to the positive pressure air source of the rail vehicle, and the other end of which is connected to the top of the transfer box, and the vacuum switch is configured to close when the vacuum degree in the transfer box is detected to be lower than a preset value; A vacuum generator, one end of which is connected to the positive pressure air source, and the other end of which is connected to the top of the transfer box, so that the pressure in the transfer box is lower than the pressure in the toilet, so as to suck the waste in the toilet into the transfer box.

5. The vacuum feces collecting device according to claim 4, characterized in that: A toilet drain valve is arranged on the drain outlet of the toilet, and the toilet drain valve is configured to open after a vacuum is established in the transfer box, so that the waste in the toilet enters the transfer box under the action of the vacuum.

6. The vacuum feces collecting device according to any one of claims 1 to 5, characterized in that: The second pipeline is provided with a waste discharge valve, and the waste discharge valve is configured to open when the waste in the transfer box reaches a threshold liquid level. The vacuum feces collection device further includes: A positive pressure applying assembly, one end of which is connected to the positive pressure air source, and the other end of which is connected to the top of the transfer box. The positive pressure applying assembly is configured to apply positive pressure to the transfer box through the positive pressure air source to empty the transfer box when the waste discharge valve is opened.

7. The vacuum feces collecting device according to claim 6, characterized in that: The first pipeline and the third pipeline are both connected to the sewage inlet of the transfer box through a sewage inlet valve, and the sewage inlet valve is configured to be closed during the process of establishing a vacuum in the transfer box.

8. A rail vehicle, characterized in that: include: A carriage, wherein the vacuum feces collecting device according to any one of claims 1 to 7 is arranged in the carriage.

9. A fault detection method for a vacuum feces collecting device of a rail vehicle, characterized in that: Applied to the vacuum feces collecting device according to any one of claims 1 to 7, the fault detection method comprises: Close the sewage valves and sewage inlet valves of multiple toilets, open the sewage discharge valve, and apply positive pressure to the transfer box through the positive pressure air source to empty the transfer box; Using a vacuum generating assembly to evacuate the transfer box; Open the toilet drain valve or wastewater drain valve. If the vacuum switch signal disappears for no less than a preset time, it is determined that the sewage inlet valve is faulty.

10. The fault detection method according to claim 9, characterized in that: When the sewage inlet valve works normally, the fault detection method further includes: The sewage inlet valve is opened, and one of the multiple toilet sewage valves is closed in turn, to determine whether the closed toilet sewage valve is faulty; Determine whether multiple toilet waste valves are faulty in turn.

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