A train grey water recycling system

Abstract

The application relates to the technical field of train wastewater treatment, and discloses a train grey water recycling system, which comprises a washing pool, a purification box and a water collecting tank. The purification box is arranged below the washing pool and is connected with the washing pool through a sewage discharge pipe. The water collecting tank is arranged below the purification box and is connected with the purification box through a water discharge pipe. A water pumping mechanism is connected to the water collecting tank. A filtering unit, an adsorption unit and a sterilization unit are sequentially arranged in the purification box from top to bottom. A suspension frame is slidably arranged in the sterilization unit at the end of the purification box. A float is arranged on the top of the suspension frame. A transparent cover is arranged on the bottom of the suspension frame. An ultraviolet sterilization lamp is arranged in the transparent cover. A plurality of vertical limiting rods are arranged on the inner bottom of the purification box and surround the inlet end of the water discharge pipe. A water stop plug is slidably arranged on the plurality of limiting rods. A pull rope is arranged on the top of the water stop plug. The application has the effect of improving the train transportation efficiency.

Description

Technical Field

[0001] This application relates to the field of train wastewater treatment technology, and in particular to a train ash water recycling system. Background Technology

[0002] In today's booming modern railway transportation, trains, as an important means of transportation, carry massive numbers of passengers across various regions every day. However, the problem of grey water discharge generated during train operation has gradually become prominent, posing a major challenge to the railway industry.

[0003] Grey water from trains primarily originates from passengers' daily activities during their journeys, including washing, cleaning, and food preparation. Its composition is complex, containing skin metabolites, detergent residues, food scraps, microorganisms, and other pollutants. Traditional trains often discharge grey water directly, wasting water resources and damaging the ecosystem along the railway line. Furthermore, the organic pollutants and microorganisms in grey water can lead to eutrophication, impacting aquatic ecosystems. The discharged grey water also pollutes the soil, hindering vegetation growth; in ecologically fragile areas, the damage can be long-term and difficult to recover.

[0004] To address the pollution caused by grey water discharge, domestic trains have recently been experimenting with a collection and storage model for energy conservation and environmental protection. Under this model, the train is equipped with a dedicated storage tank at the bottom to temporarily store grey water generated during operation. When the train stops at a station, the grey water in the tank is transferred to ground facilities for centralized treatment.

[0005] However, this solution has revealed many drawbacks in practical application. Due to the limited storage capacity of the train itself for grey water, transfer tanks need to be installed at intervals along the railway track to ensure unimpeded grey water discharge during train operation. This occupies a significant amount of trackside space and greatly increases the operational burden on the train. The large amount of grey water occupies the limited loading space inside the train, severely limiting the space available for loading clean water, leading to a shortage of water supply on board. Such frequent stops for water storage and discharge not only consume a lot of time and manpower but also increase the instability of train operation and reduce transportation efficiency. Summary of the Invention

[0006] In order to improve the transportation efficiency of trains, this application provides a train ash water recycling system.

[0007] This application provides a technical solution for a train ash water recycling system, which adopts the following approach: A system for recycling grey water from trains includes a washbasin, a purification tank, and a collection tank. The purification tank is located below the washbasin and is connected to the washbasin's drain outlet by a sewage pipe. The collection tank is located below the purification tank and is connected to the purification tank's drain outlet by a drain pipe. A pumping mechanism for drawing clean water on demand is connected to the collection tank. The purification tank contains, from top to bottom, a filtration unit for intercepting impurities, an adsorption unit for removing odors and heavy metal ions, and a disinfection unit for sterilization. A suspended frame slides and rises within the disinfection unit at the end of the purification tank. A float is located at the top of the suspended frame, and a transparent cover is located at the bottom of the suspended frame. An ultraviolet disinfection lamp is installed inside the transparent cover. Multiple vertical limiting rods are located at the bottom of the purification tank, surrounding the inlet end of the drain pipe. A water-stop rubber plug is slidably fitted onto the multiple limiting rods, and the water-stop rubber plug is inserted into the drain pipe. A pull rope connecting the suspended frame is located at the top of the water-stop rubber plug.

[0008] By adopting the above technical solution, greywater discharged from the washbasin flows into the purification tank, where it passes through a filtration unit to intercept impurities, then an adsorption unit to remove odors and heavy metal ions, and finally a disinfection unit to sterilize it using ultraviolet lamps. The purified greywater flows into a collection tank through a drain pipe and can be pumped out for use. During this process, a float moves a suspension frame up and down with the greywater level. When the suspension frame reaches a certain height, pulling the rope lifts the water-stop plug, allowing water to flow through the drain outlet and collect the clean water in the collection tank for later use. This system achieves efficient recycling and reuse of greywater from trains, freeing up more space on the train to store clean water, alleviating water supply shortages, reducing the number of stops for water storage and discharge, shortening stop times, reducing labor costs, and improving transportation efficiency.

[0009] Optionally, the filter unit is provided with a filter grid, and a cleaning roller is rotatably arranged above the filter grid. Two cleaning rollers are arranged parallel to each other on both sides below the outlet of the sewage pipe. Several blades are distributed along the circumference of the cleaning roller. The blades are arranged parallel to the axial direction of the cleaning roller. The blades of the two cleaning rollers are staggered. Gray water falls from the outlet of the sewage pipe and impacts the blades of the two cleaning rollers, driving the two cleaning rollers to rotate relative to each other.

[0010] By adopting the above technical solution, when the grey water falls from the outlet of the sewage pipe, it impacts the opposing blades of the two cleaning rollers, thereby driving the two cleaning rollers to rotate relative to each other. The rotating cleaning rollers can coil around filamentous impurities such as hair, and during the rotation, the blades can cut such impurities in the grey water, thus reducing the possibility of impurities clogging the filter screen. In addition, the rotation of the cleaning rollers can also agitate the grey water, making the suspended solids in it evenly distributed, improving the processing efficiency of subsequent treatment units. This method not only effectively reduces the cleaning frequency of the filter unit, but also improves the operational stability of the entire system.

[0011] Optionally, a scraper is slidably mounted on the filter grid, and a driving component for driving the scraper to slide is also provided in the filter unit. The scraper includes two parallel driving bars and a scraper bar connected between the two driving bars. A limiting groove is formed on the filter grid corresponding to the driving bars. The end of the limiting groove extends to the side wall of the filter grid. The driving bar is inserted into the limiting groove and slides with the limiting groove. The length direction of the limiting groove is perpendicular to the axial direction of the cleaning roller. Several scraper bars are distributed along the length direction of the driving bars, and the bristles of each scraper bar face the filter grid and abut against the surface of the filter grid.

[0012] By adopting the above technical solution, after the impurities in the grey water are intercepted by the filter grid, the driving component drives the scraper to move back and forth. The scraper strips are closely attached to the surface of the filter grid, which can scrape off the impurities attached to the filter grid during the sliding process, improve the smoothness of the filter grid, and enhance the long-term operational stability of the system.

[0013] Optionally, the driving component includes a rack disposed on the top wall of the driving bar and an incomplete gear sleeved on the end of the cleaning roller shaft. Two incomplete gears located on the same side end are rotatably meshed on the same rack, and the two incomplete gears located on the same rack are staggered.

[0014] By employing the above technical solution, the grey water flows into the purification tank and impacts the blades on the cleaning rollers, causing the two cleaning rollers to rotate relative to each other. As the cleaning rollers rotate, they drive the incomplete gears to periodically mesh with the rack, thus pushing the rack to slide. When one of the incomplete gears meshes with the rack, the rack moves, and then the other incomplete gear meshes with it. At this point, the first incomplete gear disengages from the rack, and the rack moves in the opposite direction. The sliding of the rack drives the scraper frame to move along the limiting groove, allowing the scraper strips to effectively clean the surface of the filter screen. Because the two cleaning rollers rotate relative to each other, and the incomplete gears on them act alternately on the rack, the scraper frame can slide back and forth along the limiting groove, thereby achieving automated cleaning of the filter screen and reducing the need for manual maintenance.

[0015] Optionally, the purification box has an insertion slot on one side, and two cleaning rollers are inserted into the purification box through the insertion slot. A connecting plate is sleeved on the rotating shaft on the same side of the two cleaning rollers. The connecting plate is inserted into the insertion slot and connected to the purification box. Each cleaning roller is rotatably engaged with the connecting plate. A limit ring is provided on the inner wall of the purification box. The end of the rotating shaft of the cleaning roller away from the connecting plate is inserted into the limit ring and rotatably engaged with the limit ring.

[0016] By adopting the above technical solution, the cleaning roller can be stably installed through the connecting plate and the limiting ring, improving its positioning accuracy and rotational flexibility within the purification chamber. This structural design not only facilitates the disassembly and maintenance of the cleaning roller but also effectively reduces the problem of decreased filtration efficiency caused by loosening or misalignment of the cleaning roller during greywater treatment, thereby improving the operational reliability of the entire system.

[0017] Optionally, a drive gear is fitted onto the rotating shaft of the cleaning roller extending from the connecting plate. The drive gear is provided with a handle on the side opposite to the connecting plate for easy manual rotation, and adjacent drive gears are engaged in rotation.

[0018] By adopting the above technical solution, when the cleaning roller becomes stuck or stops rotating due to excessive entanglement of impurities, manually rotating the handle can drive the drive gear plate to rotate, thereby driving the cleaning roller to resume rotation, resolving the stuck state, and significantly improving the maintainability of the system. Simultaneously, the meshing transmission design between adjacent drive gear plates enables synchronous reverse rotation of the cleaning roller, effectively enhancing the removal of impurities and further improving the system's cleaning efficiency.

[0019] Optionally, the adsorption unit is provided with an activated carbon filter element, and guide keys are vertically provided on the opposite side walls of the purification box. The filter grid and the activated carbon filter element are slidably sleeved on the guide keys. The guide keys are respectively provided with positioning elements corresponding to the filter grid and the activated carbon filter element. The positioning elements include a plug rod that slides through the guide key and the side wall of the purification box, a plug block provided at the end of the plug rod facing into the purification box, a connecting ring sleeved on the end of the plug rod extending out of the purification box, and a spring sleeved on the plug rod. The spring is abutted against the opposite side of the outer wall of the purification box and the connecting ring.

[0020] By adopting the above technical solution, both the filter grille and the activated carbon filter element are slidably mounted on the guide key, and fixed and disassembled by the positioning component, facilitating regular maintenance and replacement. When disassembly is required, simply pull the connecting ring to overcome the spring force, causing the insertion block to disengage from the guide key and the side wall of the purification chamber, allowing the filter grille or activated carbon filter element to be easily removed. The operation is simple and efficient, improving the long-term stability of the system.

[0021] Optionally, the drain pipe is an S-shaped water trap.

[0022] By adopting the above technical solution, the S-shaped water trap in the drain pipe effectively prevents odor backflow. Because the S-shaped water trap can retain a certain amount of water, forming a water seal, it prevents odors from the purification chamber from dissipating into the external environment through the drain pipe, improving the comfort of using the system. At the same time, the S-shaped design helps slow down the water flow, allowing impurities remaining in the greywater to further settle under gravity, improving the system's purification effect.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. After being discharged from the washbasin, the grey water flows into the purification tank. It passes through a filtration unit to intercept impurities, then an adsorption unit to remove odors and heavy metal ions, and finally a disinfection unit using ultraviolet lamps for sterilization. The purified grey water flows into a collection tank through a drain pipe and can be pumped out for use. During this process, a float moves a suspension frame up and down with the grey water level. When the suspension frame reaches a certain height, pulling the rope lifts the water-stopping plug, allowing water to flow through the drain outlet and collect the clean water in the collection tank for later use. This system achieves efficient recycling and reuse of grey water from trains, freeing up more space inside the train to store clean water, alleviating water supply shortages, reducing the number of stops for water storage and discharge, shortening stop times, reducing labor costs, and improving transportation efficiency. 2. As the greywater flows from the drain pipe outlet, it impacts the opposing blades of the two cleaning rollers, causing them to rotate relative to each other. The rotating cleaning rollers can coil around filamentous impurities such as hair, and the blades cut these impurities in the greywater during rotation, reducing the likelihood of clogging the filter screen. Furthermore, the rotation of the cleaning rollers agitates the greywater, distributing suspended solids evenly and improving the processing efficiency of subsequent treatment units. This method not only effectively reduces the cleaning frequency of the filter unit but also enhances the overall system's operational stability. 3. After impurities in the grey water are intercepted by the filter grid, the drive unit drives the scraper to move back and forth. The scraper strips are in close contact with the surface of the filter grid, which can scrape off the impurities attached to the filter grid during the sliding process, improve the smoothness of the filter grid and enhance the long-term operational stability of the system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 This is a cross-sectional view showing the internal structure of the purification box in the embodiments of this application.

[0026] Figure 3This is an exploded view showing the positional relationship between the cleaning roller, the filter grid, and the scraper in the embodiments of this application.

[0027] Figure 4 This is a cross-sectional view showing the connection relationship between the guide key, plug rod, plug block, connecting ring and spring in the embodiments of this application.

[0028] Figure 5 This is a cross-sectional view showing the connection relationship between the suspension frame, transparent cover, ultraviolet disinfection lamp and water-stopping rubber plug in the embodiments of this application.

[0029] Explanation of reference numerals in the attached figures: 01. Toilet water storage tank; 02. Cleaning faucet; 1. Washbasin; 11. Sewage pipe; 2. Purification tank; 21. Filter unit; 211. Scraper frame; 2111. Drive bar; 2112. Scraper bar; 212. Drive component; 2121. Rack; 2122. Incomplete gear; 22. Adsorption unit; 221. Activated carbon filter; 23. Disinfection unit; 24. Insertion groove; 25. Limiting ring; 26. Guide key; 27. Fixing rod; 271. Positioning nut; 28. Limiting rod; 281. Water-stop rubber plug; 282. Pull rope; 3. Water collection tank; 31. Drain pipe; 4. 1. Pumping mechanism; 41. First pumping pipe; 42. First pumping pump; 43. Second pumping pipe; 44. Second pumping pump; 5. Filter screen; 51. Limiting groove; 6. Cleaning roller; 61. Blade; 62. Connecting plate; 621. Rubber pad; 63. Drive gear plate; 631. Handle; 7. Positioning component; 71. Insert rod; 711. Connecting rod; 72. Inserting block; 73. Connecting ring; 74. Spring; 8. Suspension frame; 81. Float; 82. Transparent cover; 821. Ultraviolet disinfection lamp; 9. Battery module; 91. Power supply bar; 92. Insulating block; 93. Sealed charging block. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0031] This application discloses a system for recycling train ash water.

[0032] Reference Figure 1 and Figure 2A train grey water recycling system includes a washbasin 1, a purification tank 2, and a water collection tank 3. The purification tank 2 is located below the washbasin 1 and the two are connected by a drain pipe 11. The water collection tank 3 is located below the purification tank 2. In this embodiment, the water collection tank 3 is fixed below the floor of the train washroom. The water collection tank 3 and the purification tank 2 are connected by a drain pipe 31. In this embodiment, the drain pipe 31 adopts an S-shaped water trap to prevent odor backflow. A pumping mechanism 4 is connected to the water collection tank 3. The purification tank 2 contains, from top to bottom, a filtration unit 21, an adsorption unit 22, and a disinfection unit 23.

[0033] Reference Figure 1 and Figure 2 The greywater flows from the washbasin 1 into the purification tank 2, where it passes through the filtration unit 21 to intercept impurities. It then undergoes adsorption unit 22 to remove odors and heavy metal ions, and finally sterilization treatment in the disinfection unit 23. The purified greywater flows through the drain pipe 31 into the collection tank 3, and can be pumped out as needed using the pumping mechanism 4.

[0034] Reference Figure 2 and Figure 3 The filter unit 21 is detachably equipped with a filter grid 5 and a cleaning roller 6. The filter grid 5 is used to intercept larger particulate impurities. The cleaning roller 6 is located between the outlet of the drain pipe 11 and the filter grid 5, and is rotatably mounted on the purification box 2. Two cleaning rollers 6 are arranged parallel to each other on both sides below the outlet of the drain pipe 11. Each cleaning roller 6 has several blades 61 fixedly distributed along its circumference, and the blades 61 are arranged parallel to the axial direction of the cleaning roller 6. The blades 61 of the two cleaning rollers 6 are staggered. When the gray water falls from the outlet of the drain pipe 11 and impacts the blades 61 of the two cleaning rollers 6, it can drive the two cleaning rollers 6 to rotate relative to each other. In this embodiment, the blades 61 are made of stainless steel, and their cutting edges are finely ground to ensure that the filter grid 5 is not damaged during the cleaning process.

[0035] Reference Figure 2 and Figure 3 One side of the purification chamber 2 has an insertion slot 24, through which two cleaning rollers 6 are inserted into the purification chamber 2. A connecting plate 62 is rotatably mounted on the rotating shaft of the two cleaning rollers 6 on the same side via a bearing. The connecting plate 62 is inserted into the insertion slot 24 and sealed to the purification chamber 2 by bolts and a rubber gasket 621. A limit ring 25 is fixedly installed on the inner wall of the purification chamber 2. The end of the rotating shaft of the cleaning roller 6 facing away from the connecting plate 62 is inserted into the limit ring 25 and rotatably engaged with it.

[0036] Reference Figure 2A drive gear 63 is fixedly sleeved on the rotating shaft of the cleaning roller 6 extending from the connecting plate 62. A handle 631 is fixedly installed on the side of the drive gear 63 away from the connecting plate 62, and two adjacent drive gears 63 rotate and mesh, making it convenient for operators to perform manual cleaning.

[0037] Reference Figure 3 A scraper frame 211 is slidably mounted on the filter grid 5, and a drive component 212 for sliding the scraper frame 211 is also provided inside the filter unit 21. The scraper frame 211 includes a drive bar 2111 and a scraper bar 2112. Two parallel limiting grooves 51 are distributed along the axial direction of the cleaning roller 6 on the top surface of the filter grid 5. The length direction of the limiting grooves 51 is perpendicular to the axial direction of the cleaning roller 6, and the ends of the limiting grooves 51 extend to the side wall of the filter grid 5. The drive bar 2111 corresponds one-to-one with the limiting groove 51 and is inserted into the limiting groove 51 and slides in cooperation with the limiting groove 51. Several scraper bars 2112 are distributed along the length direction of the drive bar 2111. Each scraper bar 2112 is fixedly connected between two drive bars 2111, and the bristles of each scraper bar 2112 face the filter grid 5 and are in contact with the surface of the filter grid 5. The scraper strip 2112 in this embodiment is made of nylon, which has good wear resistance and flexibility, and can effectively remove residues on the filter grid 5.

[0038] Reference Figure 3 In this embodiment, the driving component 212 includes a rack 2121 and an incomplete gear 2122. The rack 2121 is integrally formed on the top wall of the driving bar 2111 along its length. The incomplete gear 2122 is fixedly sleeved on the end of the shaft of the cleaning roller 6, and two incomplete gears 2122 located on the same side of the shaft mesh with the same rack 2121, and the two incomplete gears 2122 on the same rack 2121 are staggered. When one of the incomplete gears 2122 on the end of the shaft of the cleaning roller 6 meshes with the rack 2121 and pushes the rack 2121 to slide away from the other side of the cleaning roller 6, the incomplete gear 2122 on the other side of the cleaning roller 6 rotates to the side away from the rack 2121. For example, the rack 2121 can be made of high-strength steel, which has good wear resistance and can withstand long-term use without being easily damaged.

[0039] Reference Figure 2 and Figure 4The adsorption unit 22 contains an activated carbon filter element 221 for removing odors and heavy metal ions. Two vertical guide keys 26 are fixedly installed on opposite side walls inside the purification chamber 2. The filter grid 5 and the activated carbon filter element 221 are slidably mounted on the four guide keys 26. Multiple positioning elements 7 are provided on the guide keys 26 corresponding to the installation positions of the filter grid 5 and the activated carbon filter element 221. Two positioning elements 7 are distributed on each opposite side of the filter grid 5. The positioning elements 7 on the activated carbon filter element 221 are installed in the same manner as those on the filter grid 5.

[0040] Reference Figure 3 and Figure 4 The positioning component 7 includes a plug-in rod 71, a plug-in block 72, a connecting ring 73, and a spring 74. The plug-in rod 71 slides through the guide key 26 and the side wall of the purification chamber 2. The plug-in block 72 is fixedly disposed at the end of the plug-in rod 71 facing inwards from the purification chamber 2, and its top surface has a guide surface facing inwards from the purification chamber 2 to facilitate the insertion of the filter grid 5 and the activated carbon filter element 221. The connecting ring 73 is fixedly sleeved on the end of the plug-in rod 71 extending out of the purification chamber 2. The spring 74 is sleeved on the plug-in rod 71 and abuts against the outer side wall of the purification chamber 2. When the spring 74 is in its natural state, the plug-in block 72 is inserted into the groove of the corresponding filter grid 5 or activated carbon filter element 221.

[0041] Reference Figure 3 and Figure 4 The ends of two plug-in rods 71 ​​located on the same side of the filter grid 5 are fixedly connected by a connecting rod 711. The connecting rod 711 is located outside the purification box 2, making it easy to pull one side of the plug-in rod 71 simultaneously to release the fixed state. A fixing rod 27 is fixedly installed on the outer wall of the purification box 2, through which the connecting rod 711 slides. The fixing rod 27 extends out of the connecting rod 711 and is fitted with a positioning nut 271 by threaded rotation. During normal operation, the positioning nut 271 presses the connecting rod 711 against the purification box 2. This reduces the possibility of the plug-in block 72 loosening due to shaking during train operation and improves the purification and sealing effect.

[0042] Reference Figure 2 and Figure 5 Within the disinfection unit 23, a suspended frame 8 is vertically and slidably mounted. A float 81 is fixedly mounted on the top of the suspended frame 8, and a transparent cover 82 is sealed at the bottom. An ultraviolet disinfection lamp 821 is installed inside the transparent cover 82. In this embodiment, the transparent cover 82 is made of quartz glass, which has good light transmittance and high-temperature resistance, ensuring the normal operation of the ultraviolet disinfection lamp 821. The suspended frame 8 allows the ultraviolet disinfection lamp 821 to automatically adjust its height according to the greywater level, thereby enabling the ultraviolet disinfection lamp 821 to disinfect the greywater below the suspended frame 8.

[0043] Reference Figure 2 and Figure 5Multiple vertical limiting rods 28 are fixedly installed at the bottom of the purification box 2. The multiple limiting rods 28 are arranged around the inlet end of the drain pipe 31. A rubber water-stop plug 281 is slidably sleeved on the multiple limiting rods 28. The water-stop plug 281 is inserted and matched with the drain pipe 31. A nylon pull rope 282 is connected to the top of the water-stop plug 281. The top of the pull rope 282 is fixed on the suspension frame 8.

[0044] Reference Figure 2 and Figure 5 To continuously power the UV disinfection lamp 821, a battery module 9 is sealed and embedded in the outer wall of the purification box 2. A vertical power supply bar 91 is fixedly installed on the side of the battery module 9 facing the inside of the purification box 2. The power supply bar 91 is electrically connected to the battery module 9, and an insulating block 92 is fixedly installed at the bottom of the power supply bar 91. A transparent cover 82 is slidably fitted onto the power supply bar 91, and a sealed charging block 93 electrically connected to the UV disinfection lamp 821 is embedded in the side wall of the transparent cover 82 facing the power supply bar 91. During the lifting and lowering of the suspension frame 8, the sealed charging block 93 is in contact with the power supply bar 91, making contact and providing continuous power to the UV disinfection lamp 821. When the suspension frame 8 is lowered to its lowest position, at which point there is no ash water accumulation in the disinfection unit 23, the sealed charging block 93 slides to contact the insulating block 92, and the UV disinfection lamp 821 is de-energized, saving energy resources.

[0045] Reference Figure 1 The water pumping mechanism 4 includes a first water pump pipe 41, a first water pump 42, a second water pump pipe 43, and a second water pump 44. The first water pump pipe 41 is connected to the toilet water storage tank 01 and the collection tank 3 in the bathroom through the first water pump 42. The second water pump pipe 43 is connected to the cleaning faucet 02 and the collection tank 3 through the second water pump 44. The cleaning water released by the cleaning faucet 02 can be used to clean the floor and wipe tables and chairs.

[0046] The implementation principle of a train greywater recycling system according to an embodiment of this application is as follows: after greywater is discharged from the washbasin 1, it flows into the filtration unit 21 in the purification box 2. The filter grid 5 and cleaning roller 6 first intercept larger particulate impurities; after preliminary filtration, the greywater flows through the adsorption unit 22, where the activated carbon filter 221 removes odors and heavy metal ions; after adsorption treatment, the greywater flows through the disinfection unit 23, where the ultraviolet disinfection lamp 821 kills microorganisms; after treatment, the greywater flows into the water collection tank 3 through the drain pipe 31, and is finally recycled through the pumping mechanism 4.

[0047] By incorporating a filtration unit 21, an adsorption unit 22, and a disinfection unit 23, efficient treatment and recycling of greywater are achieved. The filter grid 5 and cleaning roller 6 in the filtration unit 21 effectively intercept larger particulate impurities; the activated carbon filter element 221 in the adsorption unit 22 removes odors and heavy metal ions; and the ultraviolet disinfection lamp 821 in the disinfection unit 23 kills microorganisms, ensuring that the greywater meets recycling standards. Simultaneously, the inclusion of a water trap effectively prevents odor backflow, improving the overall performance of the system. This compact system occupies little space and effectively solves problems existing in current technologies, improving train transportation efficiency.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A system for recycling grey water from trains, characterized in that, The system includes a washbasin (1), a purification tank (2), and a water collection tank (3). The purification tank (2) is located below the washbasin (1) and is connected to the drain outlet of the washbasin (1) by a drain pipe (11). The water collection tank (3) is located below the purification tank (2) and is connected to the drain outlet of the purification tank (2) by a drain pipe (31). The water collection tank (3) is connected to a pumping mechanism (4) for drawing clean water as needed. The purification tank (2) contains, from top to bottom, a filter unit (21) for intercepting impurities, an adsorption unit (22) for removing odors and heavy metal ions, and a disinfection unit (23) for sterilization. The unit located at the end of the purification tank (2) is... The disinfection unit (23) at the end has a suspended frame (8) that slides up and down. The top of the suspended frame (8) is provided with a float (81), and the bottom of the suspended frame (8) is provided with a transparent cover (82). An ultraviolet disinfection lamp (821) is installed inside the transparent cover (82). The bottom of the purification box (2) is provided with multiple vertical limiting rods (28). The multiple limiting rods (28) are arranged around the inlet end of the drain pipe (31). A water-stop rubber plug (281) is slidably sleeved on the multiple limiting rods (28). The water-stop rubber plug (281) is inserted and matched with the drain pipe (31). The top of the water-stop rubber plug (281) is provided with a pull rope (282) for connecting the suspended frame (8). The filter unit (21) is provided with a filter grid (5). A cleaning roller (6) is rotatably arranged above the filter grid (5) in the filter unit (21). Two cleaning rollers (6) are arranged parallel to each other on both sides below the outlet of the sewage pipe (11). Several blades (61) are distributed along the circumference of the cleaning roller (6). The blades (61) are arranged parallel to the axial direction of the cleaning roller (6). The blades (61) of the two cleaning rollers (6) are staggered. The gray water falls from the outlet of the sewage pipe (11) and impacts the blades (61) of the two cleaning rollers (6), driving the two cleaning rollers (6) to rotate relative to each other. A scraper (211) is slidably mounted on the filter grid (5). A drive component (212) for sliding the scraper (211) is also provided inside the filter unit (21). The scraper (211) includes two parallel drive bars (2111) and a scraper bar (2112) connected between the two drive bars (2111). A limiting groove (51) is formed on the filter grid (5) corresponding to the drive bars (2111). The end of the limiting groove (51)... The drive bar (2111) extends to the side wall of the filter grid (5), and is inserted into the limiting groove (51) and slides with the limiting groove (51). The length direction of the limiting groove (51) is perpendicular to the axial direction of the cleaning roller (6). Several scraper bars (2112) are distributed along the length direction of the drive bar (2111), and the bristles of each scraper bar (2112) face the filter grid (5) and are in contact with the surface of the filter grid (5). The drive unit (212) includes a rack (2121) disposed on the top wall of the drive bar (2111) and an incomplete gear (2122) sleeved on the end of the shaft of the cleaning roller (6). Two incomplete gears (2122) located on the same side end are rotatably meshed on the same rack (2121), and the two incomplete gears (2122) located on the same rack (2121) are staggered. An activated carbon filter element (221) is provided inside the adsorption unit (22). Guide keys (26) are vertically provided on the opposite side walls of the purification box (2). The filter grid (5) and the activated carbon filter element (221) are slidably sleeved on the guide key (26). The guide key (26) is provided with positioning parts (7) corresponding to the filter grid (5) and the activated carbon filter element (221). The positioning part (7) includes a plug rod (71) that slides through the guide key (26) and the side wall of the purification box (2), a plug block (72) provided at one end of the plug rod (71) facing into the purification box (2), a connecting ring (73) sleeved on one end of the plug rod (71) extending out of the purification box (2), and a spring (74) sleeved on the plug rod (71). The spring (74) abuts against the outer side wall of the purification box (2) and the connecting ring (73). The drain pipe (31) adopts an S-shaped water trap.

2. The train ash water recycling system according to claim 1, characterized in that... The purification box (2) has an insertion slot (24) on one side. Two cleaning rollers (6) are inserted into the purification box (2) through the insertion slot (24). A connecting plate (62) is sleeved on the rotating shaft on the same side of the two cleaning rollers (6). The connecting plate (62) is inserted into the insertion slot (24) and connected to the purification box (2). Each cleaning roller (6) is rotatably engaged with the connecting plate (62). A limiting ring (25) is provided on the inner wall of the purification box (2). The end of the rotating shaft of the cleaning roller (6) away from the connecting plate (62) is inserted into the limiting ring (25) and rotatably engaged with the limiting ring (25).

3. A train ash water recycling system according to claim 2, characterized in that... The cleaning roller (6) extends from the rotating shaft of the connecting plate (62) and is fitted with a drive gear (63). The drive gear (63) is provided with a handle (631) on the side away from the connecting plate (62) for easy hand-driven rotation, and two adjacent drive gears (63) are rotated and meshed.

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