Water supply system and rail vehicle

Abstract

This invention provides a water supply system and a rail vehicle. The water supply system has a water tank inlet connected to a water injection pipeline, and a pressurization pipeline connected to the water tank via a three-way valve. The three-way valve is also equipped with an external pipeline connected to the external environment. When the water tank is in a water supply or drainage state, the pressurization pipeline is connected to the water tank via the three-way valve and can pressurize the water tank. When the water tank is in a water injection state, the water injection pipeline is connected to the water tank and can drive the three-way valve to switch to a state connecting the water tank to the external environment. By adding a three-way valve to the pressurization pipeline, this water supply system and rail vehicle ensure reliable linkage between the pressurization pipeline, water injection pipeline, drainage pipeline, and external pipeline, ensuring that the water tank can efficiently and smoothly achieve pneumatically controlled water injection, supply, and drainage. The system is lightweight, and the components do not come into contact with water, making operation more reliable. During pneumatic water supply, the water pressure is stable, operation is noiseless, operating costs are low, antifreeze drainage is fast, and normal water supply can be achieved even without AC power.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and more particularly to a water supply system and a rail vehicle. Background Technology

[0002] Railway trains are a common mode of transportation in people's daily lives. Trains are usually equipped with water tanks to supply water to passengers. The train water supply system mainly provides various types of water, such as drinking water, kitchen water, bar water, electric water heaters, washing water, toilet flushing water, and cleaning water.

[0003] Currently, common water supply systems for railway vehicles include gravity-fed water supply, electric water pump water supply, and pneumatic diaphragm pump water supply. Gravity-fed water supply systems require the water tank to be mounted on the roof, resulting in a high center of gravity and a high risk of leakage due to the numerous internal pipes. Electric water pump water supply systems rely on a pump for water supply, requiring a continuous power supply to maintain operation; furthermore, to ensure stable pressure, electric water pumps need pressure buffer tanks and pressure switches, components that come into contact with water and are prone to malfunction. Additionally, the water tank is open to the atmosphere, posing a risk of contamination. Summary of the Invention

[0004] The present invention provides a water supply system and a rail vehicle equipped with the water supply system, in order to solve the defects of the prior art where water supply systems are usually supplied by water pumps, and require the installation of pressure buffer tanks and water pressure switches, etc., which are frequently in contact with water and are prone to rust or blockage.

[0005] The present invention provides a water supply system, including a water tank, a pressurization pipeline and a water injection pipeline. The water inlet of the water tank is connected to the water injection pipeline. The pressurization pipeline is connected to the water tank through a three-way valve. The three-way valve is also equipped with an external pipeline connected to the external environment.

[0006] The water tank is in a water supply state or a drainage state, and the pressurization pipeline is connected to the water tank through the three-way valve and can pressurize the water tank;

[0007] The water tank is in a water-filling state, the water-filling pipeline is connected to the water tank, and can drive the three-way valve to switch to a state that connects the water tank to the external environment.

[0008] According to the water supply system provided by the present invention, the pressurization pipeline is equipped with a pressurization check valve, a backup air cylinder and a pressurization solenoid valve, and a filter pressure regulating valve is installed on at least one side of the backup air cylinder on the pressurization pipeline.

[0009] The water supply system provided by the present invention further includes a water supply pipeline and at least one drainage pipeline. The inlet end of the water supply pipeline extends to the bottom of the water tank, and the outlet end of the water supply pipeline is connected to the train water supply equipment. Each of the drainage pipelines is connected to the bottom of the water tank, and each drainage pipeline is equipped with a manual drain valve.

[0010] According to the water supply system provided by the present invention, a safety valve is installed on the pressurization pipeline; a pressure relief valve is installed in the water tank, and the pressure relief valve is connected to any of the drainage pipelines through a pipeline.

[0011] According to the water supply system provided by the present invention, a water supply tank is installed at the bottom of the water tank and at a position lower than the bottom plate of the water tank, and the first end of the water supply pipeline extends into the water supply tank.

[0012] According to the water supply system provided by the present invention, the drain end of the water supply pipeline is connected to the drain pipeline, and the water supply pipeline is equipped with an air vent valve.

[0013] According to the water supply system provided by the present invention, the drain end of the water supply pipeline is connected to the drain pipeline through a pneumatically controlled drain valve, and a pressure switch is installed on the pressurization pipeline. The pressure switch is electrically connected to the pressurization solenoid valve and the pneumatically controlled drain valve respectively.

[0014] According to the water supply system provided by the present invention, the water injection pipeline is provided with a water injection port, and the water injection pipeline between the water injection port and the water tank is equipped with a water injection check valve and a water injection filter, and the end of the water injection pipeline extending into the water tank is equipped with a buoyancy valve.

[0015] According to the water supply system provided by the present invention, the water inlet is configured with a water inlet channel, and the water inlet channel is equipped with a movable plate that can be opened and closed. The movable plate is connected to the three-way valve through a cable. The opening and closing of the movable plate can drive the cable to move, so as to synchronously drive the three-way valve to perform port switching.

[0016] According to the water supply system provided by the present invention, an external pipe filter is installed on the external pipe.

[0017] According to the water supply system provided by the present invention, the water tank is equipped with a plurality of water level sensors and liquid level switches.

[0018] According to the water supply system provided by the present invention, the water tank is equipped with a water temperature sensor or a temperature switch, and the water tank is connected to a heating device.

[0019] The present invention also provides a rail vehicle equipped with the water supply system described above.

[0020] This invention provides a water supply system relying on air pressure. The system includes a water tank, a pressurization pipeline, and an injection pipeline. The water tank's inlet is connected to the injection pipeline, and the pressurization pipeline is connected to the water tank via a three-way valve. The three-way valve also has an external pipeline connected to the external environment. When the water tank is in a water supply or drainage state, the pressurization pipeline is connected to the water tank via the three-way valve and can pressurize the water tank. When the water tank is in a water injection state, the injection pipeline is connected to the water tank and can drive the three-way valve to switch to a state connecting the water tank to the external environment. By adding a three-way valve to the pressurization pipeline, this system ensures reliable linkage between the pressurization pipeline, injection pipeline, drainage pipeline, and external pipeline, guaranteeing efficient and smooth air-controlled water injection, supply, and drainage. The system is lightweight, its components operate reliably without contact with water, it provides stable water pressure during air pressure supply, operates without noise, has low operating costs, fast anti-freeze and drainage speeds, and can provide normal water supply even without AC power.

[0021] Compared with existing technologies, this water supply system offers more flexible and efficient state switching. The system utilizes a three-way valve to flexibly change the on / off states of the pressurization pipeline, the water injection pipeline, and the external pipeline. This allows the water tank to be supplied and drained using air pressure, while also ensuring the tank remains connected to the external environment during water injection, guaranteeing smooth and efficient water filling.

[0022] Compared with existing technologies, this water supply system completely replaces electrical control components with pneumatic control components, adds pressurized pipelines and three-way valves, and ensures that none of the components of the entire system have direct contact with water, thereby ensuring more reliable system operation and normal water supply even without AC power.

[0023] The present invention also provides a rail vehicle, which, by setting up the water supply system as described above, possesses all the advantages of the aforementioned water supply system, the details of which will not be elaborated here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the water supply system provided by the present invention.

[0026] Figure label:

[0027] 1. Water tank; 11. Water supply tank;

[0028] 2. Water injection pipeline; 21. Water injection port; 211. Movable plate; 22. Buoyancy valve; 23. Water injection check valve; 24. Water injection filter;

[0029] 3. Pressurization pipeline; 31. Three-way valve; 32. Pressurization solenoid valve; 33. Spare cylinder; 34. Pressurization check valve; 35. Filter pressure regulating valve; 36. Pressure switch; 37. Safety valve; 38. External pipe filter;

[0030] 4. Water supply pipeline; 41. Air vent valve;

[0031] 5. Cables;

[0032] 6. Drainage pipes; 61. Manual drain valve; 62. Pneumatic drain valve;

[0033] 7. Safety relief valve; 8. Water level sensor; 9. Temperature sensor. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] like Figure 1 As shown, this embodiment provides a water supply system relying on air pressure. The system includes a water tank 1, a pressurization pipeline 3, and a water injection pipeline 2. The inlet of the water tank 1 is connected to the water injection pipeline 2, which, when open, injects water into the water tank 1. The pressurization pipeline 3 is connected to the water tank 1 via a three-way valve 31. The three-way valve 31 is also equipped with an external pipeline that can connect to the external environment. Specifically, the first end of the three-way valve 31 is connected to the pressurization pipeline 3, the second end is connected to the top of the water tank 1, and the third end is connected to the external pipeline. It should be noted that the third end of the three-way valve 31 can also be directly connected to the external environment, omitting the external pipeline.

[0036] It should be noted that, Figure 1 Arrow A in the diagram indicates the water injection direction of water injection pipe 2; port B is the port of pressurization pipe 3 connected to the air source; port C is the port of the three-way valve connected to the external environment, that is, the third end of the three-way valve or the port of the external pipe; arrow D indicates the water supply direction of water supply pipe 4; and arrow E indicates the drainage and pressure relief direction of the pressure relief pipe.

[0037] This water supply system, by adding a three-way valve 31 to the pressurization pipeline 3, enables reliable linkage between the pressurization pipeline 3, the water injection pipeline 2, the drainage pipeline 6, and the external pipeline, ensuring that the water tank 1 can efficiently and smoothly achieve pneumatically controlled water injection, supply, and drainage. Furthermore, the system is lightweight, its components operate more reliably without contact with water, it provides stable water pressure during pneumatic water supply, operates without noise, has low operating costs, fast antifreeze and drainage speeds, and can achieve normal water supply even without AC power.

[0038] In this embodiment, the three-way valve 31 is connected between the water tank 1, the pressurization pipeline 3 and the external pipeline. The three-way valve 31 can switch ports in conjunction with the opening of the water injection pipeline 2.

[0039] Water tank 1 is in the water filling state. Water filling pipe 2 is connected to water tank 1 and can drive three-way valve 31 to switch to the state of connecting water tank 1 and the external environment, so that the air pressure inside and outside water tank 1 is consistent with atmospheric pressure. While water filling pipe 2 is continuously filling water into water tank 1, water tank 1 can vent air out through the third port of three-way valve 31, thereby ensuring that the water filling process is stable and efficient.

[0040] Water tank 1 is in the water supply state, and three-way valve 31 is in the state of connecting pressurization pipeline 3 and water tank 1. In this state, pressurization pipeline 3 can supply air to water tank 1 for pressurization, and there is a pressure difference between the inside and outside of water tank 1. The pressure difference can be used to force the water in water tank 1 into water supply pipeline 4 to supply water to the train's water equipment.

[0041] Similarly, when water tank 1 is in the draining state, the three-way valve 31 is also in the state of connecting the pressurizing pipe 3 and water tank 1. In this state, the pressurizing pipe 3 can supply air to pressurize water tank 1, and there is a pressure difference between the inside and outside of water tank 1. The pressure difference can be used to force the water in water tank 1 into the drain pipe 6, thereby emptying water tank 1 and drain pipe 6. Thus, the water stored in water tank 1 and drain pipe 6 can be drained as needed for antifreeze or cleaning water tank 1.

[0042] It should be noted that when water supply pipe 4 needs to be drained, it is preferable that the drain end of water supply pipe 4 is connected to drain pipe 6. Air is introduced into water tank 1 via pressurization pipe 3, pressurizing the water stored in water supply pipe 4 and causing it to drain from the drain end into drain pipe 6. Preferably, water supply pipe 4 is equipped with an air vent valve 41 to expel excess air from the pipe during drainage, ensuring smooth and efficient emptying of the water stored in water supply pipe 4.

[0043] It should be noted that, as Figure 1 As shown, an external pipe filter 38 is installed on the external pipe to prevent foreign objects from entering the water tank, avoid water pollution, and ensure the cleanliness of the water in the tank. The external pipe filter 38 can be directly connected to the third port of the three-way valve 31.

[0044] In this embodiment, the water tank 1 is preferably equipped with a level switch to indicate the water level in the water tank 1 when the vehicle is in use. Correspondingly, the water tank 1 is equipped with several water level sensors 8 to sense the water level inside the tank 1. Preferably, several water level sensors 8 are vertically spaced along the side wall of the inner wall of the water tank 1, with one water level sensor 8 located at the full water level and another at the minimum water level. When the water level switch is below 0 or the minimum water level, the pressurization pipeline 3 stops pressurizing, the water supply pipeline 4 stops supplying water, and an alarm is set up at the vehicle control center or outside the water tank 1 to issue a water shortage warning.

[0045] In this embodiment, the water tank 1 is preferably equipped with a water temperature sensor or a temperature switch. The water tank 1 is connected to a heating device. When the water temperature is lower than the set temperature, the heating device is turned on to achieve antifreeze heating to prevent the water tank 1 from freezing at low temperature.

[0046] In some embodiments, such as Figure 1 As shown, the pressurization pipeline 3 is equipped with a pressurization check valve 34, a spare air cylinder, and a pressurization solenoid valve 32. Understandably, to ensure normal airflow and stable pressure, the first end of the pressurization pipeline 3 is connected to the vehicle's air source, and the second end is connected to the first end of the three-way valve 31. The pressurization check valve 34, spare air cylinder, and pressurization solenoid valve 32 are sequentially installed between the first and second ends of the pressurization pipeline 3. The pressurization check valve 34 ensures that the airflow within the pressurization pipeline 3 is unidirectional, preventing reverse airflow from blocking the pipeline and causing overload damage, and also ensuring stable and smooth pressurization within the water tank 1. The spare air cylinder stores gas so that it can replenish airflow in a timely manner if the airflow from the air source is obstructed or interrupted, ensuring stable water supply and drainage for the water tank 1. The pressurization solenoid valve 32 controls the opening and closing of the pressurization pipeline 3.

[0047] In this embodiment, a filter pressure regulating valve 35 is installed on at least one side of the standby air cylinder on the pressurization pipeline 3. The filter pressure regulating valve 35 is used to filter, stabilize, and regulate the airflow passing through the pressurization pipeline 3. In this embodiment, a filter pressure regulating valve 35 is provided at both the air inlet and air outlet of the standby air cylinder. One of the filter pressure regulating valves 35 is installed between the standby air cylinder and the pressurization solenoid valve 32 to filter, stabilize, and regulate the airflow from the standby air cylinder; and a pressurization one-way valve 34 is installed between the other filter pressure regulating valve 35 and the standby air cylinder to filter, stabilize, and regulate the airflow from the air source.

[0048] It should be noted that the backup air cylinder can meet the needs of long-term water supply and antifreeze evacuation when the vehicle has no air supply. Furthermore, when the water tank 1 is in an evacuated state, the backup gas in the backup air cylinder can be pressurized to push the water in the water tank 1 into the water supply pipe 4 and / or the drain pipe 6, so as to achieve full evacuation of the water tank 1 and the pipes.

[0049] In some embodiments, the water injection pipe 2 is provided with a water injection port 21. For example... Figure 1 As shown, a one-way valve 23 and a filter 24 are installed on the water inlet 21 and the water tank 1, and a buoyancy valve 22 is installed at the end of the water inlet 2 that extends into the water tank 1. In this embodiment, as... Figure 1 As shown, the water filter 24 and the one-way valve 23 are sequentially connected to the water inlet 21 and the float valve 22 in the water inlet pipeline 2. The one-way valve 23 ensures that the water in the water inlet pipeline 2 flows unidirectionally into the water tank 1, preventing backflow. Furthermore, the float valve 22 is located inside the water inlet of the water tank 1 and automatically seals the inlet when the water tank 1 is full, preventing overflow and backflow into the water inlet pipeline 2. The water filter 24 filters the water flow, ensuring clean water.

[0050] In this embodiment, the water inlet of water tank 1 is located at the top of water tank 1. Preferably, with the vertical axis of water tank 1 as the central axis, several water inlets are symmetrically arranged on the side walls or top plate on both sides of the central axis of water tank 1, and each water inlet is connected to a water inlet pipe. This structure can achieve efficient water filling of water tank 1 and effectively balance the water pressure.

[0051] In this embodiment, the water inlet 21 has a water inlet channel wider than the water inlet pipe 2. This water inlet channel is preferably inclined, with the inlet port tilted towards the ground. Preferably, the water inlet channel is equipped with a movable plate 211 that can be opened and closed. The movable plate 211 is connected to a three-way valve 31 via a pull cable 5. Opening and closing the movable plate 211 can move the pull cable 5, synchronously driving the three-way valve 31 to perform port switching. The movable plate 211 can trigger the switching between water injection and pressurization states by opening and closing, and in the closed state, the movable plate 211 can also seal the water inlet port of the water inlet channel, providing dust prevention and safety.

[0052] In this embodiment, the top of the movable plate 211 is preferably hinged to the top of the water inlet port of the water inlet channel, and a spring connects the movable plate 211 to the water inlet port of the water inlet channel so that the movable plate 211 can be sealed at the water inlet port under the action of the spring. The movable plate 211 is connected to the three-way valve 31 through the pull cable 5. When the movable plate 211 is opened, it can pull the pull cable 5, thereby driving the three-way valve 31 to rotate, thereby realizing the port switching of the three-way valve 31. This achieves synchronous switching of the water injection pipeline 2 and the three-way valve 31 during the state switching process of the water tank 1, increasing the flexibility and automation of the state switching control of the water tank 1.

[0053] It should be noted that the movable plate 211 can also be connected to the three-way valve 31 through other structures, such as electrical control connection or pull rod connection, as long as the synchronous switching of the water injection pipeline 2 and the three-way valve 31 during the state switching process of water tank 1 can be achieved.

[0054] It should be noted that a light indicator and / or sound indicator can also be installed on the water injection pipe 2, and a pressure sensor for monitoring pressure changes can be installed on the water injection pipe 2 to provide a water injection early warning indication and realize the early warning of water overflow.

[0055] In some embodiments, such as Figure 1 As shown, the water supply system also includes a water supply pipe 4 and at least one drain pipe 6. The inlet end of the water supply pipe 4 extends to the bottom of the water tank 1, and the outlet end of the water supply pipe 4 is connected to the train's water-using equipment. When the water tank 1 is in the water supply state, the pressure inside the water tank 1 forces the water stored in the water tank 1 from the bottom of the water tank 1 into the inlet end of the water supply pipe 4, and then delivers it to the train's water-using equipment via the water supply pipe 4. Each drain pipe 6 is connected to the bottom of the water tank 1, and each drain pipe 6 is equipped with a manual drain valve 61. When the water tank 1 is in the draining state, the user can open the manual drain valve 61 to quickly drain the water stored in the water tank 1 by gravity via the drain pipe 6.

[0056] It should be noted that, in this embodiment, preferably, several drainage pipes 6 are symmetrically connected to the side walls or bottom plate on both sides of the central axis of the water tank 1 to balance the drainage efficiency within the water tank 1. For example... Figure 1 As shown, a drain pipe 6 is connected to each of the two bottom sides of the side wall of water tank 1.

[0057] In this embodiment, to achieve safe pressure limiting, a safety valve 37 is preferably installed on the pressurization pipeline 3. The safety threshold of the safety valve 37 is preferably set lower than the maximum bearing pressure of the water tank 1 to prevent the air pressure provided by the pressurization pipeline 3 from being too high. If the air pressure exceeds the safety threshold, the safety valve 37 can automatically cut off the pressurization pipeline 3. Preferably, a pressure relief valve is installed in the water tank 1, and the pressure relief valve is connected to any drainage pipeline 6 through a pipe. When the pressure in the water tank 1 is greater than the safe pressure, the pressure relief valve can open in time and start to drain and relieve pressure from the water tank 1.

[0058] It should be noted that the water tank 1 described in this embodiment is equipped with a pressure relief pipeline, and the pressure relief valve can be installed at any position on the pressure relief pipeline. However, if Figure 1 The optimal position for installing the pressure relief valve is at the top of water tank 1. This placement ensures efficient and stable pressure relief within water tank 1, preventing water accumulation in the tank and related piping during pressure relief. Furthermore, a malfunction in the buoyancy valve 22 on the water inlet pipe 2 can cause water tank 1 to overflow uncontrollably, and under pressurization conditions, a malfunction in the pressure regulator or filter pressure regulating valve 35 can lead to excessively high air pressure and a malfunction in the safety valve 37. In these situations, opening the pressure relief valve allows for timely pressure relief, preventing damage to water tank 1.

[0059] In this embodiment, to ensure that all the water in the water tank 1 can enter the water supply pipe 4 when the water tank 1 is in the water supply state, and to avoid water accumulation in the water tank 1, it is preferable that a water supply tank 11 is installed at the bottom of the water tank 1 and below the bottom plate of the water tank 1, and the first end of the water supply pipe 4 extends into the water supply tank 11. This structure can also ensure that the water tank 1 can supply water normally even when the vehicle is tilted.

[0060] In some embodiments, to achieve automated drainage control and improve the control accuracy and efficiency of the water supply system, the drain end of the water supply pipeline 4 is preferably connected to the drainage pipeline 6 via a pneumatically controlled drain valve 62. A pressure switch 36 is installed on the pressurization pipeline 3, and the pressure switch 36 is electrically connected to both the pressurization solenoid valve 32 and the pneumatically controlled drain valve 62. Activation of the pressure switch 36 coordinates the control of the pressurization solenoid valve 32 and the pneumatically controlled drain valve 62, thereby coordinating the opening and closing of the pressurization pipeline 3 and the drainage pipeline 6.

[0061] In the above embodiments, the water supply system is in a water-filling state: the movable plate 211 of the water inlet 21, through the cable 5, switches the three-way valve 31 from being connected to the water tank 1 via the pressurized pipeline 3 to being connected to the atmosphere via the water tank 1; under this condition, pressurization automatically stops, allowing the water tank 1 to be connected to the atmosphere. If the water tank 1 is not full, the water inlet pipeline 2 on either side opens the one-way valve 23 to fill the water tank 1 under the pressure of the water, and the gas in the water tank 1 is discharged from the three-way valve 31 through the external pipe filter 38. When the water tank 1 is full, the buoyancy valve 22 of the water inlet pipeline 2 automatically closes, the water tank 1 stops filling, and the pressure indicator shows that it is full, or a pressure relief valve is installed on the water inlet pipeline 2 to drain water and indicate that it is full, thereby realizing the filling of the water tank 1 and preventing overflow and waste of water resources.

[0062] In the above embodiments, the water supply system is in a water supply state: the water injection pipe 2 is disconnected, the movable plate 211 of the water injection port 21 is closed under the action of the spring, and the drive cable 5 moves, thereby driving the three-way valve 31 to rotate to the pressurization pipe 3 to communicate with the water tank 1; under this condition, the pressurization pipe 3 begins to pressurize the water tank 1, and the water in the water tank 1 leaves the water tank 1 through the water supply pipe 4 at the bottom of the water tank 1 and supplies water to the train's water-using equipment. During this pressurization process, the airflow in the train's air source is transported to the spare air cylinder for storage through the one-way valve; under this condition, the filter pressure regulating valve 35 reduces the pressure to 50kPa-70kPa. Specifically, the minimum pressurization pressure in the pressurization pipe should be higher than the pressure required by the train's water-using equipment, which is at least 20kPa higher; the maximum output pressure in the pressurization pipe should not be higher than the preset maximum pressure of the safety valve 37, and the preset maximum pressure of the safety valve 37 should be lower than the maximum pressure that the water tank 1 can withstand.

[0063] Similarly, the water supply system described in the above embodiments is in a drainage state: the water injection pipe 2 is disconnected, and the three-way valve 31 is in a state where the pressurization pipe 3 is connected to the water tank 1; under this condition, the pressurization pipe 3 pressurizes the water tank 1, and the water in the water tank 1 is discharged from the water tank 1 through the drain pipe 6 at the bottom of the water tank 1. During this pressurization process, the airflow in the train's air source is delivered to the spare air cylinder for storage through the one-way valve; under this condition, the pressure regulating valve 35 reduces the pressure to 50kPa-70kPa. Specifically, the minimum pressurization pressure in the pressurization pipe should be higher than the pressure required by the train's water-using equipment, which is at least 20kPa higher; the maximum output pressure in the pressurization pipe should not be higher than the preset maximum pressure of the safety valve 37, and the preset maximum pressure of the safety valve 37 should be lower than the maximum pressure that the water tank 1 can withstand.

[0064] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0066] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water supply system, characterized in that, It includes a water tank, a pressurization pipeline and a water injection pipeline. The water inlet of the water tank is connected to the water injection pipeline. The pressurization pipeline is connected to the water tank through a three-way valve. The three-way valve is also equipped with an external pipeline connected to the external environment. The water tank is in a water supply state or a drainage state, and the pressurization pipeline is connected to the water tank through the three-way valve and can pressurize the water tank; The water tank is in the water filling state, the water filling pipeline is connected to the water tank, and can drive the three-way valve to switch to the state of connecting the water tank and the external environment; The first end of the three-way valve is connected to the pressurization pipeline, the second end of the three-way valve is connected to the top of the water tank, and the third end of the three-way valve is connected to the external environment. The pressurization pipeline is equipped with a pressurization check valve, a backup air cylinder, and a pressurization solenoid valve. A filter pressure regulating valve is installed on at least one side of the backup air cylinder on the pressurization pipeline. The first end of the pressurization pipeline is connected to the air source on the vehicle, and the second end of the pressurization pipeline is connected to the first port of the three-way valve. The pressurization check valve, the spare air cylinder, and the pressurization solenoid valve are sequentially installed between the first and second ends of the pressurization pipeline.

2. The water supply system according to claim 1, characterized in that, It also includes a water supply pipeline and at least one drainage pipeline. The inlet end of the water supply pipeline extends to the bottom of the water tank, and the outlet end of the water supply pipeline is connected to the train's water supply equipment. Each of the drainage pipelines is connected to the bottom of the water tank, and each drainage pipeline is equipped with a manual drain valve.

3. The water supply system according to claim 2, characterized in that, The pressurization pipeline is equipped with a safety valve; the water tank is equipped with a pressure relief valve, which is connected to any of the drainage pipelines via a pipe.

4. The water supply system according to claim 2, characterized in that, A water supply tank is installed at the bottom of the water tank and below the bottom plate of the water tank, and the first end of the water supply pipe extends into the water supply tank.

5. The water supply system according to claim 2, characterized in that, The drain end of the water supply pipeline is connected to the drain pipeline, and the water supply pipeline is equipped with a vent valve.

6. The water supply system according to claim 5, characterized in that, The drain end of the water supply pipeline is connected to the drain pipeline via a pneumatically controlled drain valve. A pressure switch is installed on the pressurization pipeline, and the pressure switch is electrically connected to the pressurization solenoid valve and the pneumatically controlled drain valve, respectively.

7. The water supply system according to any one of claims 1-6, characterized in that, The water injection pipeline is provided with a water injection port, and a water injection check valve and a water injection filter are installed on the water injection pipeline between the water injection port and the water tank. A buoyancy valve is installed at the end of the water injection pipeline that extends into the water tank.

8. The water supply system according to claim 7, characterized in that, The water inlet has a water inlet channel, and the water inlet channel is equipped with a movable plate that can be opened and closed. The movable plate is connected to the three-way valve via a cable. The opening and closing of the movable plate can drive the cable to move, so as to synchronously drive the three-way valve to switch ports.

9. The water supply system according to any one of claims 1-6, characterized in that, An external pipe filter is installed on the external pipe line.

10. The water supply system according to any one of claims 1-6, characterized in that, The water tank is equipped with several water level sensors and liquid level switches.

11. The water supply system according to any one of claims 1-6, characterized in that, The water tank is equipped with a water temperature sensor or temperature switch, and the water tank is connected to a heating device.

12. A rail vehicle, characterized in that, The water supply system as described in any one of claims 1-11 is installed.

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