Anti-freezing emptying system for face washing room of motor train unit
By combining air compressor units and pressure relief devices, the problem of water freezing in the pipelines of high-speed trains was solved, achieving efficient antifreeze drainage and water conservation, and improving the safety and reliability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI WANLI IND DEV
- Filing Date
- 2025-05-22
- Publication Date
- 2026-04-14
AI Technical Summary
Existing high-speed trains rely on gravity for drainage, which cannot effectively prevent water from freezing on the inner walls of pipes and at valve locations, leading to pipe blockages or valve failure.
An air compressor unit combined with a pipeline design is adopted. After gravity-fed drainage, air is blown out. Combined with a pressure relief device, the sewage tank is depressurized and solid-liquid separation is performed to ensure that the residual water in the pipeline is reduced. An ash water tank is also set up for water conservation and toilet flushing.
It achieves efficient antifreeze drainage, reduces residual water in the pipes, avoids freezing, improves the safety and reliability of the system, and saves water.
Smart Images
Figure CN224117289U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of antifreeze and venting technology for high-speed trains, specifically to an antifreeze and venting system for the washroom of a high-speed train. Background Technology
[0002] Anti-freeze venting refers to the technical measures taken to prevent residual liquids (such as water) in a system or equipment from freezing and expanding in low-temperature environments, which could damage pipes, valves, or equipment. The anti-freeze venting structure in the washrooms of high-speed trains typically combines drain valves and piping designs to achieve manual or automatic venting. For example, on the CRH5 high-speed train, the red frozen drain valve on the toilet module's water system panel is manually opened, allowing water in the piping to be drained by gravity and flow to the water tank under the train.
[0003] Currently, the antifreeze and venting system of high-speed trains relies on gravity. Water flows through pipes from top to bottom to a water tank under the carriage. However, gravity-driven flow cannot guarantee that the water is clean. Water adhering to the inner wall of the pipes and at the valve positions may still freeze, leading to pipe blockage or valve failure. Utility Model Content
[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:
[0005] The anti-freezing and air venting system for the washroom of the high-speed train includes a washbasin, a toilet, a clean water tank, and a wastewater tank. The washbasin is installed off the ground, the toilet is installed on the floor inside the carriage, and the clean water tank and wastewater tank are suspended below the carriage. The faucet of the washbasin is connected to the clean water tank via a connecting pipe six, and the drain outlet of the washbasin is connected to the wastewater tank via a connecting pipe one. A valve one is installed on the connecting pipe one near the drain outlet of the washbasin. The drain outlet of the toilet is connected to the wastewater tank via a connecting pipe three, and a valve three is installed on the connecting pipe three near the toilet. An air compressor unit is suspended below the carriage, and the air outlet of the air compressor unit is connected to an air supply pipe. An air blowing pipe one is connected to the air supply pipe, and a valve seven is installed on the air blowing pipe one near the connecting pipe one.
[0006] Furthermore, a pressure relief device is installed on the top of the sewage tank, and a funnel-shaped hood is installed inside the pressure relief device. The funnel-shaped hood has a funnel-like structure with a smaller bottom and a larger top. Both the top and bottom of the funnel-shaped hood are open. The bottom of the funnel-shaped hood is fixed to and communicates with the top of the sewage tank. Several air inlet pipes are fixed to the outer side of the funnel-shaped hood near the top position. The bottom opening of the air inlet pipes extends into the sewage tank. The air inlet pipes are inclined. Pipe clips are fixed to the inner side of the pressure relief device corresponding to the positions of the air inlet pipes, and the air inlet pipes are fixed by the pipe clips. The pressure relief device is used to relieve pressure in the sewage tank, and at the same time, the funnel-shaped hood and the inclined air inlet pipes are used to separate liquids or solid-liquid mixtures in the discharged air.
[0007] Furthermore, a top cover is fixed to the top of the funnel hood, and an extension tube extending into the funnel hood is fixed to the top cover at the position corresponding to the fixed tube. A fixed cover is fixed to the top of the top cover at the position corresponding to the extension tube, and the fixed cover communicates with the extension tube. Multiple equally spaced through holes 1 are opened on the outside of the fixed cover, and a through hole 2 is opened on the outside of the pressure relief device at the height position corresponding to the through hole 1. An exhaust pipe is fixed between through hole 2 and through hole 1. The extension tube and the top cover are designed to prevent liquid or solid-liquid mixtures from flying out through the top opening of the funnel hood.
[0008] Furthermore, a fixed tube is installed at the center of the funnel hood, and a spiral blade is fixed between the outside of the fixed tube and the funnel hood. The spiral blade can guide the gas entering the funnel hood, causing it to generate a reliable and stable centrifugal spin.
[0009] Furthermore, a grey water tank is installed below the washbasin, with its height exceeding that of the toilet bowl. A connecting pipe 1 connects to the grey water tank, and a connecting pipe 2 connects to the grey water tank. Connecting pipe 4 connects to the connecting pipe 2 and is also connected to the toilet bowl's flushing pipe. Valves 4 and 5 are installed on connecting pipe 4 near connecting pipe 2 and the toilet bowl, respectively. The grey water tank temporarily stores grey water from the washbasin and uses it for flushing the toilet, thus conserving water.
[0010] Furthermore, the grey water tank and the sewage tank are connected by a connecting pipe two. A valve two is installed on the connecting pipe two near the grey water tank. A connecting pipe four connects to the valve two and the connecting pipe two between the grey water tank and the grey water tank. The grey water in the grey water tank can be directly discharged into the sewage tank through the connecting pipe without passing through the toilet.
[0011] Furthermore, a connecting pipe five connects the connecting pipe four and the connecting pipe three, and a valve six is installed on the connecting pipe five near the connecting pipe four. The connecting pipe five facilitates reliable purging of the inside of the connecting pipe four during air purging.
[0012] Furthermore, the air supply pipe is also connected to an air blowing pipe two, which is connected to both the connecting pipe four and the connecting pipe two between the ash water tank and the connecting pipe two. A valve eight is installed on the air blowing pipe two near the connecting pipe two. The air blowing pipe two can bypass the ash water tank for air purging.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. This utility model is equipped with an air compressor unit and connected to the drain pipe of the washroom via pipeline. When performing antifreeze drainage, the pipeline valve is first opened to allow gravity drainage, and then the air compressor unit outputs compressed air to the pipeline for air purging, thereby greatly reducing the amount of residual water in the pipeline and ensuring the antifreeze drainage effect.
[0015] 2. This utility model adds a grey water tank, which uses grey water to flush the toilet, thus saving water. At the same time, the grey water tank is located inside the carriage and is not easily frozen.
[0016] 3. The pressure relief device in this utility model is used to relieve pressure in the sewage tank, which can ensure the pressure stability of the sewage tank, avoid the continuous increase of internal pressure caused by the input of compressed gas, and ensure the safety of the entire system.
[0017] 4. The pressure relief device in this utility model not only has the effect of reducing the pressure inside the sewage tank, but also can separate the air discharged during pressure relief, separating the liquid or solid-liquid mixture in the air, which can reduce the pollution to the area below the carriage. Attached Figure Description
[0018] Figure 1 This is a structural diagram of the venting system of this utility model;
[0019] Figure 2 This is a perspective view of the pressure relief device in this utility model;
[0020] Figure 3 This is a cross-sectional view of the pressure relief device in this utility model;
[0021] Figure 4 This is a schematic diagram of the intake pipe configuration in this utility model;
[0022] Figure 5 This is a schematic diagram of the exhaust pipe arrangement in this utility model;
[0023] Figure 6 This is a perspective view of the spiral blade in this utility model.
[0024] Attached reference numerals: 1. Washbasin; 2. Toilet; 3. Clean water tank; 4. Sewage tank; 5. Ash water tank; 6. Connecting pipe one; 7. Valve one; 8. Connecting pipe two; 9. Valve two; 10. Connecting pipe three; 11. Valve three; 12. Connecting pipe four; 13. Valve four; 14. Valve five; 15. Connecting pipe five; 16. Valve six; 17. Connecting pipe six; 18. Air compressor unit; 19. Air supply pipe; 20. Air blowing pipe one; 21. Valve seven; 22. Air blowing pipe two; 23. Valve eight; 24. Pressure relief device; 25. Funnel cover; 26. Spiral blade; 27. Fixed pipe; 28. Air inlet pipe; 29. Top cover; 30. Extension pipe; 31. Fixed cover; 32. Exhaust pipe; 33. Pipe clamp; 34. Through hole one; 35. Through hole two. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0026] This application provides an anti-freezing and venting system for the washrooms of high-speed trains, mainly addressing the problem that existing high-speed trains rely on gravity-fed water for venting, which cannot guarantee venting effectiveness. The following technical solution is provided, which will be discussed in conjunction with... Figures 1-6 Please provide a detailed explanation:
[0027] The antifreeze and drainage system for the washroom of the EMU includes a washbasin 1, a toilet 2, a clean water tank 3, and a sewage tank 4. The washbasin 1 is installed off the ground, the toilet 2 is installed on the floor inside the carriage, the clean water tank 3 and the sewage tank 4 are suspended under the EMU carriage, and a grey water tank 5 is installed below the washbasin 1. The grey water tank 5 is installed at a higher height than the toilet 2.
[0028] The faucet of the washbasin 1 is connected to the clean water tank 3 by a connecting pipe 17. The drain of the washbasin 1 is connected to the grey water tank 5 by a connecting pipe 6. A valve 7 is installed on the connecting pipe 6 near the drain of the washbasin 1. The grey water tank 5 is connected to the sewage tank 4 by a connecting pipe 8. A valve 9 is installed on the connecting pipe 8 near the grey water tank 5. The toilet 2 is connected to the sewage tank 4 by a connecting pipe 10. A valve 11 is installed on the connecting pipe 10 near the toilet 2.
[0029] A connecting pipe 12 is connected to the connecting pipe 8 between valve 29 and the grey water tank 5. The connecting pipe 12 is also connected to the flushing pipe of the toilet 2. Valve 13 and valve 14 are installed on the connecting pipe 12 near the connecting pipe 8 and the toilet 2, respectively.
[0030] An air compressor unit 18 is suspended under the carriage. The air outlet of the air compressor unit 18 is connected to a connecting pipe 17. A blowing pipe 20 is connected to the connecting pipe 17. The blowing pipe 20 is also connected to the connecting pipe 6 between the valve 7 and the ash water tank 5. A valve 21 is installed on the blowing pipe 20 near the connecting pipe 6.
[0031] When using the washbasin 1, the clean water in the clean water tank 3 is pumped by the EMU unit along the connecting pipe 17 to the faucet at the washbasin 1. The water produced at this time is grey water. The grey water flows into the grey water tank 5 for temporary storage through the opened valve 7 and connecting pipe 6. When flushing the toilet 2, the valves 13 and 14 are opened. The grey water in the grey water tank 5 enters the flushing pipe of the toilet 2 through the connecting pipe 12 to flush the toilet 2. When flushing the toilet 2, the valve 11 is opened and the sewage produced by flushing flows into the sewage tank 4 through the connecting pipe 10.
[0032] During the emptying process, gravity drainage is performed first. Valve 1 (7), valve 2 (9), valve 3 (11), valve 4 (13), and valve 5 (14) are opened to connect the washbasin 1, grey water tank 5, and toilet 2 with the sewage tank 4. At this time, the water in the grey water tank 5 and the pipeline can flow into the sewage tank 4 by gravity. After gravity drainage is completed, air purging is performed to drain the sewage.
[0033] At this time, close valve 1 (7), valve 3 (11), and valve 5 (14), and open valve 2 (9), valve 4 (13), and valve 7 (21). Start the air compressor unit 18 to generate compressed gas. The compressed gas enters the connecting pipe 1 (6) through the connecting pipe 6 (17) and the blowing pipe 1 (20), and flows through the connecting pipe 1 (6), connecting pipe 2 (8), connecting pipe 4 (12), and connecting pipe 3 (10). The flow of gas blows away the water in the pipe, reducing the water residue in the pipe. The combination of gravity drainage and air purging can improve the drainage effect.
[0034] In some embodiments, a pressure relief device 24 is installed on the top of the sewage tank 4, and a funnel cover 25 is installed inside the pressure relief device 24. The funnel cover 25 is configured in the shape of a funnel with a small bottom and a large top. Both the top and bottom of the funnel cover 25 are open. The bottom of the funnel cover 25 is fixed and communicates with the top of the sewage tank 4. A fixing pipe 27 is installed at the center of the funnel cover 25. A spiral blade 26 is fixed between the outside of the fixing pipe 27 and the funnel cover 25.
[0035] Multiple air inlet pipes 28 are fixed to the top of the funnel cover 25. The bottom opening of the air inlet pipe 28 extends into the sewage tank 4. The air inlet pipe 28 is inclined at an angle of 60°. A pipe buckle 33 is fixed to the inside of the pressure relief device 24 corresponding to the position of the air inlet pipe 28. The air inlet pipe 28 is fixed by the pipe buckle 33. A top cover 29 is fixed to the top of the funnel cover 25. An extension pipe 30 extending into the funnel cover 25 is fixed to the top cover 29 corresponding to the position of the fixed pipe 27. A fixing cover 31 is fixed to the top of the top cover 29 corresponding to the position of the extension pipe 30. The fixing cover 31 is connected to the extension pipe 30. Multiple through holes 34 with equal spacing are opened on the outside of the fixing cover 31. A through hole 35 is opened on the outside of the pressure relief device 24 at the height position of the through hole 34. An exhaust pipe 32 is fixed between the through hole 35 and the through hole 34.
[0036] The air generated by the air purging eventually enters the sewage tank 4. Therefore, a pressure relief system is set up to relax the pressure. The air in the sewage tank 4 enters the air inlet pipe 28 through the internal positive pressure, and then enters the funnel hood 25. Due to the inclined setting of the air inlet pipe 28 and the setting of the spiral blade 26 in the funnel hood 25, the airflow entering the funnel hood 25 will generate a spin and use the centrifugal force of the spin to stick to the surface of the funnel hood 25 and the spiral blade 26 to rotate. When the gas entering the funnel hood 25 contains liquid or solid-liquid mixture, because the liquid or solid-liquid mixture has a certain weight, it will fall back into the sewage tank 4 from the bottom of the funnel hood 25 under the centrifugal rotation of the spiral blade 26. The air is lighter and can be discharged from the extension pipe 30, the fixed cover 31 and the exhaust pipe 32 for normal pressure relief.
[0037] In some embodiments, a connecting pipe 15 is connected between connecting pipe 4 12 and connecting pipe 3 10, and a valve 6 16 is installed on connecting pipe 5 15 near connecting pipe 4 12.
[0038] During air purging, valve 616 is opened, and the air entering the connecting pipe 412 can directly enter the connecting pipe 310 through the connecting pipe 515, and finally enter the sewage tank 4, keeping the connecting pipe 412 unobstructed and ensuring the air purging effect. When using the toilet 2, valve 616 is closed.
[0039] In some embodiments, the gas supply pipe 19 is also connected to the second air blowing pipe 22, which is connected to the second connecting pipe 8 between the fourth connecting pipe 12 and the grey water tank 5. A valve 8 23 is installed on the second air blowing pipe 22 near the second connecting pipe 8.
[0040] If it is only a temporary purging and emptying, and the ash water tank 5 contains ash water that can be used during the subsequent driving process, then air purging can be performed by closing valve 7 21 and opening valve 8 23. The compressed air output by the air compressor unit 18 enters the air blowing pipe 22 through the air supply pipe 19, which is equivalent to skipping the sewage tank 4 and performing air purging on other pipelines.
[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A freeze-proof and venting system for the washroom of a high-speed train, comprising a washbasin (1), a toilet (2), a clean water tank (3), and a wastewater tank (4), wherein the washbasin (1) is installed off the ground, the toilet (2) is installed on the floor inside the carriage, and the clean water tank (3) and the wastewater tank (4) are suspended below the carriage of the high-speed train, characterized in that, The faucet of the washbasin (1) is connected to the water tank (3) via a connecting pipe six (17). The drain of the washbasin (1) is connected to the sewage tank (4) via a connecting pipe one (6). A valve one (7) is installed on the connecting pipe one (6) near the drain of the washbasin (1). The toilet (2) is connected to the sewage tank (4) via a connecting pipe three (10). A valve three (11) is installed on the connecting pipe three (10) near the toilet (2). An air compressor unit (18) is hoisted under the carriage. An air supply pipe (19) is connected to the air outlet of the air compressor unit (18). An air blowing pipe one (20) is connected to the air supply pipe (19). The air blowing pipe one (20) is connected to the connecting pipe one (6). A valve seven (21) is installed on the air blowing pipe one (20) near the connecting pipe one (6).
2. The antifreeze and venting system for the washroom of a high-speed train according to claim 1, characterized in that, A pressure relief device (24) is installed on the top of the sewage tank (4). A funnel cover (25) is installed inside the pressure relief device (24). The funnel cover (25) is a funnel-shaped structure with a small bottom and a large top. The top and bottom of the funnel cover (25) are open. The bottom of the funnel cover (25) is fixed and connected to the top of the sewage tank (4). Multiple air inlet pipes (28) are fixed on the outside of the funnel cover (25) near the top. The bottom opening of the air inlet pipe (28) extends into the sewage tank (4). The air inlet pipe (28) is inclined. A pipe buckle (33) is fixed on the inside of the pressure relief device (24) corresponding to the position of the air inlet pipe (28). The air inlet pipe (28) is fixed by the pipe buckle (33).
3. The antifreeze and venting system for the washroom of a high-speed train according to claim 2, characterized in that, The top of the funnel cover (25) is fixed with a top cover (29). An extension tube (30) extending into the funnel cover (25) is fixed on the top cover (29) at the position corresponding to the fixed tube (27). A fixing cover (31) is fixed on the top of the top cover (29) at the position corresponding to the extension tube (30). The fixing cover (31) is connected to the extension tube (30). Multiple through holes (34) with equal spacing are opened on the outside of the fixing cover (31). A through hole (35) is opened on the outside of the pressure relief device (24) at the height position corresponding to the through hole (34). An exhaust pipe (32) is fixed between the through hole (35) and the through hole (34).
4. The antifreeze and venting system for the washroom of a high-speed train according to claim 3, characterized in that, A fixing tube (27) is installed at the center of the funnel cover (25), and a spiral blade (26) is fixed between the outside of the fixing tube (27) and the funnel cover (25).
5. The antifreeze and venting system for the washroom of a high-speed train according to claim 1, characterized in that, A grey water tank (5) is installed below the washbasin (1). The grey water tank (5) is set at a height higher than the toilet bowl (2). Connecting pipe 1 (6) is connected to the grey water tank (5). Connecting pipe 2 (8) is connected to the grey water tank (5). Connecting pipe 4 (12) is connected to the connecting pipe 2 (8). Connecting pipe 4 (12) is also connected to the flushing pipe of the toilet bowl (2). Valve 4 (13) and valve 5 (14) are installed on the connecting pipe 4 (12) near the connecting pipe 2 (8) and the toilet bowl (2), respectively.
6. The antifreeze and venting system for the washroom of a high-speed train according to claim 5, characterized in that, The grey water tank (5) and the sewage tank (4) are connected by a connecting pipe two (8). A valve two (9) is installed on the connecting pipe two (8) near the grey water tank (5). The connecting pipe four (12) is connected to the valve two (9) and the connecting pipe two (8) between the grey water tank (5).
7. The antifreeze and venting system for the washroom of a high-speed train according to claim 6, characterized in that, A connecting pipe five (15) is connected between the connecting pipe four (12) and the connecting pipe three (10), and a valve six (16) is installed on the connecting pipe five (15) near the connecting pipe four (12).
8. The antifreeze and venting system for the washroom of a high-speed train according to claim 7, characterized in that, The gas supply pipe (19) is also connected to the second air blowing pipe (22), which is connected to the fourth connecting pipe (12) and the second connecting pipe (8) between the ash water tank (5). A valve (23) is installed on the second air blowing pipe (22) near the second connecting pipe (8).