Water supply device with self-cleaning function and self-cleaning method

Abstract

The invention discloses a water supply device with a self-cleaning function and a self-cleaning method, and belongs to the technical field of valve machining equipment. The method comprises the steps that S1, a water pump conveys sewage to a centralized water station, after the liquid level is lowered to a first liquid level, the water pump conveys the sewage to a cleaning arm, the cleaning arm rotates, and cleaning is conducted for a first preset time; the water outlet drains water outwards; when the sewage is reduced to a second liquid level, the water pump stops supplying water to the cleaning arm, and the cleaning arm stops rotating; s2, continuously draining water from the water outlet, and stopping draining water after the sewage is drained; s3, water is supplemented through a water supplementing opening, and water supplementing is stopped when the liquid level rises to the first liquid level; the water pump supplies water to the cleaning arm, the water pump conveys clean water to the centralized water station after cleaning is conducted for a second preset time, and drainage is stopped when the second liquid level is reached; and S4, the step S3 is executed one or more times, and after the last time of cleaning is completed, clear water is not discharged. The first liquid level is lower than the highest liquid level where the cleaning arm can normally operate, and the second liquid level is higher than the liquid level where the water pump cannot normally operate.

Description

Technical Field

[0001] The present invention belongs to the technical field of valve processing equipment, and in particular relates to a water supply device with a self-cleaning function and a self-cleaning method. Background Art

[0002] The function of the engine valve is to input air into the engine and discharge the exhaust gas after combustion. The valve can usually be made from bar stock.

[0003] During the valve production and processing, the processed valves need to be cleaned to remove oil and debris on their surfaces. The existing cleaning and drying method is to adopt the cleaning and drying method of the assembly line, hang the valves on the assembly line, and then use nozzles on both sides of the valves to spray cleaning liquid on the valves, and use air blowing to dry the valves at the end of the assembly line.

[0004] During the valve cleaning process, water is supplied to the cleaning device through the water supply device and wastewater from the cleaning device is collected; the water supply device filters the wastewater and then sends it to the cleaning device for reuse. The water supply device usually includes a water tank, a pump, and a filter. The wastewater output by the cleaning device needs to be discharged after a certain number of cycles and replenished with clean water. When the applicant used the water supply device, he found that the water tank would become dirty after a period of use. The dirty water would contaminate the freshly replenished clean water, affecting the cleaning effect. The applicant analyzed the dirty water tank and found that the side walls of the water tank were mainly dirty due to the oil film, and the bottom of the water tank was mainly dirty due to sediment. Therefore, the water tank needs to be cleaned regularly or when it is dirty. Summary of the Invention

[0005] To address the above-mentioned issues, embodiments of the present invention provide a water supply device and a self-cleaning method with a self-cleaning function, which can automatically clean the water tank without requiring a dedicated rotary drive structure for the cleaning arm; and can simultaneously clean the water while changing the water. The technical solution is as follows: On the one hand, an embodiment of the present invention provides a water supply device with a self-cleaning function, which includes a water tank 1, a water pump 2, a filter 3 and multiple valves. The water tank 1 is provided with a water supply port 11, a water outlet 12 and a drain port 13. The water outlet 12 is provided at the lower part of the water tank 1 and is connected to the water device through a pipeline with the water pump 2 and the filter 3. The water tank 1 can drain water outward through the drain port 13 and / or the water pump 2; the water tank 1 is barrel-shaped; the device also includes a liquid level detection structure 4, a rotating shaft 5 coaxially arranged in the water tank 1, a fixed rotary joint 6 and at least one cleaning arm 7 on the rotating shaft 5; the water outlet of the water pump 2 is also connected to the rotary joint 6 through a pipeline. One end of the rotating shaft 5 is rotationally sealed with the rotary joint 6; the washing arm 7 includes a tank wall washing arm 71 and a tank bottom washing arm 72; the tank wall washing arm 71 is located on the adjacent inner side of the side wall of the water tank 1, and a plurality of first spray holes 73 are arranged side by side on its outer side along the direction in which it is located; the tank bottom washing arm 72 is located adjacent to the upper side of the bottom of the water tank 1, and a plurality of second spray holes 74 are arranged side by side on its lower side along the direction in which it is located; the first spray holes 73 and the second spray holes 74 are inclined away from the rotation direction of the washing arm 7 to drive the washing arm 7 to rotate; when cleaning the water tank 1, the water pump 2 and the corresponding valve are controlled to supply water to the washing arm 7 according to the liquid level height, so that the washing arm 7 rotates around the rotating shaft 5. Among them, the bottom of the water tank 1 in the embodiment of the present invention is conical to form a conical bottom, the box wall cleaning arm 71 is arranged vertically, and the box bottom cleaning arm 72 is arranged obliquely upward from the inside to the outside and is parallel to the conical bottom; a heater 16 and a pump inlet filter 17 are provided at the lower part of the water tank 1; the pump inlet filter 17 is connected to the water outlet 12, and the heater 16 and the pump inlet filter 17 are both arranged horizontally and are located on the same horizontal plane; a avoidance gap 75 is provided between the outer end of the box bottom cleaning arm 72 and the lower end of the box wall cleaning arm 71 for the heater 16 and the pump inlet filter 17 to pass through.

[0006] Specifically, the number of cleaning arms 7 in the embodiment of the present invention is one, which is arranged along the radial direction of the water tank 1, and further includes an upper connecting pipe 76 and a lower connecting pipe 77; the rotating shaft 5, the box wall cleaning arm 71 and the box bottom cleaning arm 72 are all tubular structures, and both ends of the box wall cleaning arm 71 and the box bottom cleaning arm 72 are closed; the upper connecting pipe 76 is arranged along the radial direction of the water tank 1, and is arranged horizontally, with its inner end connected to the upper part of the rotating shaft 5, and its outer end is connected to the upper inner side of the box wall cleaning arm 71; the lower connecting pipe 77 is arranged along the radial direction of the water tank 1, and is arranged obliquely downward from the inside to the outside, with its inner end connected to the lower part of the rotating shaft 5, and its outer end is connected to the upper side of the inner end of the box bottom cleaning arm 72.

[0007] Furthermore, in the embodiment of the present invention, a fixed beam 14 is provided at the top of the water tank 1 along its radial direction, a rotating seat 15 is provided coaxially at the bottom thereof and located at the lower end of the rotating shaft 5, and a water inlet 18 is provided at the top thereof; the upper end of the rotating shaft 5 is rotationally sealed and connected to the rotating joint 6, the lower end thereof is closed and rotationally connected to the rotating seat 15, and the upper part thereof is rotationally connected to the fixed beam 14; the rotating joint 6 is fixed to the fixed beam 14 by a bracket 19; the rotating seat 15 is a cylindrical structure, which is located on the adjacent inner side of the cleaning arm 72 at the bottom of the tank, and is provided with a drainage hole, which is connected to the drainage outlet 13.

[0008] Furthermore, the device also includes an outer shell 8 and a base 9; the water tank 1 is arranged in the outer shell 8, and a fixed cover is provided on the top of the water tank 1 and on one side of the fixed beam 14, and a movable cover is detachably provided on the top of the water tank 1 and on the other side of the fixed beam 14, and insulation material is filled between the water tank 1 and the outer shell 8; the water inlet 18 is provided on the fixed cover and is arranged close to the fixed beam 14; the fixed beam 14 is located above the water tank 1 and its two ends are fixed on the corresponding sides of the top of the outer shell 8; the base 9 is arranged side by side with the outer shell 8 and is parallel to the corresponding sides of the outer shell 8; the water pump 2 and the filter 3 are arranged side by side on the base 9; the water outlet 12 is provided on one side of the water tank 1 close to the base 9; the drain outlet 13, the heater 16 and the water supply port 11 are located on the same side and are located on two sides perpendicular to the water tank 1 respectively with the water outlet 12.

[0009] Among them, the water inlet of the water pump 2 in the embodiment of the present invention is connected to the water outlet 12 through the water inlet pipe 21, and the water outlet is provided with a main control valve 31 and its output is divided into three routes; the first route is the water exchange pipe 22, which is provided with a water exchange valve 32 and a one-way valve 33, which is connected to the sewage treatment device or the centralized water station; the second route is the cleaning water pipe 23, which is provided with a cleaning valve 34, which is connected to the rotary joint 6; the third route is the water pipe 24, which is provided with a filter 3, a water valve 35 and a flow switch 36, which is connected to the water device; the water replenishment port 11 is connected to the cleaning liquid supply device through the water replenishment pipe 25, and the water replenishment pipe 25 is provided with a water replenishment valve 37; the drain outlet 13 is connected to the sewage treatment device through the drain pipe, and the drain pipe is provided with a drain valve.

[0010] The liquid level detection structure 4 in the embodiment of the present invention is a pressure sensor, which is provided at the bottom of the water tank 1 or on the drain outlet 13 .

[0011] Among them, the angle between the first spray hole 73 and the cylindrical surface formed by the movement of the tank wall cleaning arm 71 in the embodiment of the present invention is 30-45°, and the angle between the second spray hole 74 and the conical surface formed by the movement of the tank bottom cleaning arm 72 is 30-45°; the size of the first spray hole 73 is 1-4mm, and the distance between two adjacent first spray holes 73 is 10-30mm; the size of the second spray hole 74 is 1-4mm, and the distance between two adjacent second spray holes 74 is 10-30mm; the distance between the tank wall cleaning arm 71 and the side wall of the water tank 1 is 5-20mm, and the distance between the tank bottom cleaning arm 72 and the bottom of the water tank 1 is 5-20mm.

[0012] On the other hand, an embodiment of the present invention further provides a self-cleaning method for the aforementioned water supply device with a self-cleaning function, the method comprising: S1: The water pump 2 sends the sewage to the centralized water station. After the liquid level drops to the first liquid level, the water pump 2 sends the sewage to the cleaning arm 7. The cleaning arm 7 rotates and cleans the inner wall of the water tank 1. After the cleaning time is the first predetermined time, the drain port 13 drains water outward. When the sewage drops to the second liquid level, the water pump 2 stops supplying water to the cleaning arm 7, and the cleaning arm 7 stops rotating.

[0013] S2: The drain outlet 13 continues to drain water, and stops draining water after the sewage is drained.

[0014] S3: Replenish water through the water replenishment port 11, and stop replenishing water when the liquid level rises to the first liquid level; the water pump 2 supplies water to the cleaning arm 7, and after cleaning for the second predetermined time, the water pump 2 sends the clean water to the centralized water station, and stops draining when it reaches the second liquid level.

[0015] S4: Execute step S3 once or multiple times. After the last cleaning is completed, the clean water is not discharged.

[0016] The first liquid level is greater than the second liquid level and is lower than the highest liquid level at which the washing arm 7 can operate normally. The second liquid level is above the water outlet 12 and is higher than the liquid level at which the water pump 2 cannot operate normally.

[0017] Specifically, in step S1, when the water pump 2 delivers sewage to the centralized water station, the water exchange valve 32 is opened, and the cleaning valve 34, water valve 35, and water supply valve 37 are all closed. When the water pump 2 delivers sewage to the wash arm 7, the water exchange valve 32 is closed, and the water pump 2 and cleaning valve 34 are opened. When the drain port 13 is draining water outward, the water pump 2, cleaning valve 34, and drain valve are opened, and the water exchange valve 32 is closed. When the water pump 2 stops supplying water to the wash arm 7, the water pump 2, cleaning valve 34, and water exchange valve 32 are closed, and the drain valve is opened. In step S2, after drainage is completed, the drain valve is closed. In step S3, when water is replenished through the water replenishment port 11, the water replenishment valve 37 is opened and the water pump 2 is closed; when water replenishment is stopped when the liquid level rises to the first liquid level, the water replenishment valve 37 is closed; when the water pump 2 supplies water to the cleaning arm 7, the water pump 2 and the cleaning valve 34 are opened, and the water exchange valve 32 is closed; when the water pump 2 sends clean water to the centralized water station, the water pump 2 and the water exchange valve 32 are opened, and the cleaning valve 34 is closed; when drainage is stopped when the liquid level reaches the second liquid level, the water pump 2, the water exchange valve 32 and the cleaning valve 34 are closed. The technical solution provided by the embodiment of the present invention has the following beneficial effects: (1) The water tank can be cleaned automatically without the need to set up a special rotary drive structure for the cleaning arm. The structure is simple and easy to maintain.

[0018] (2) Cleaning can be achieved while changing water, and the cleaning speed is fast.

[0019] (3) Good cleaning effect. The applicant found that when cleaning the valve, the bottom of the water tank is easier to clean, while the side walls of the water tank are more difficult to clean (mainly the upper part, where the oil film floats on the surface. The tank wall cleaning arm of this patent also has a high flushing pressure at the upper part, and the lower part is located in the water with a low flushing pressure). When there is water at the bottom of the water tank (there is water at the bottom of the water tank when the water is drained and the water pump is running), it can also be cleaned.

[0020] (4) It will not interfere with other structures (such as heaters and pump inlet filters, etc.).

[0021] (5) Low water consumption, partial wastewater recycling, and all clean water recycling.

[0022] (6) Especially suitable for scenarios where cleaning or water changes are required frequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of a water supply device with a self-cleaning function in an embodiment of the present invention; Figure 2 is a side view of a water supply device with a self-cleaning function; Figure 3 It is a top view of a water supply device with a self-cleaning function; Figure 4 It is a structural diagram of the water tank and cleaning arm combination; Figure 5 yes Figure 4 Cross-sectional view of the middle cleaning arm rotating to the pump inlet filter; Figure 6 yes Figure 4 Cross-sectional view of the middle cleaning arm rotating to the heater.

[0024] In the figure: 1 water tank, 2 water pump, 3 filter, 4 liquid level detection structure, 5 rotating shaft, 6 rotary joint, 7 cleaning arm, 8 outer shell, 9 base; 11 water supply port, 12 water outlet, 13 drain port, 14 fixed beam, 15 rotating seat, 16 heater, 17 pump inlet filter, 18 water inlet, 19 bracket; 21 water inlet pipe, 22 water exchange pipe, 23 cleaning water pipe, 24 water pipe, 25 water supply pipe; 31 main control valve, 32 water exchange valve, 33 one-way valve, 34 cleaning valve, 35 water valve, 36 flow switch, 37 water supply valve; 71 box wall cleaning arm, 72 box bottom cleaning arm, 73 first spray hole, 74 second spray hole, 75 avoidance gap, 76 upper connecting pipe, 77 lower connecting pipe. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0026] Example 1 See also Figure 1-6 Embodiment 1 provides a water supply device with a self-cleaning function, which includes a water tank 1, a water pump 2, a filter 3, multiple valves (including a master control valve 31, a water exchange valve 32, a one-way valve 33, a cleaning valve 34, a water valve 35, and a water supply valve 37), a liquid level detection structure 4, a rotating shaft 5, a rotary joint 6, and at least one cleaning arm 7. The water tank 1 is provided with a water supply port 11, a water outlet 12, a water drain port 13, and a water inlet 18. The water tank 1 is vertically arranged in a cylindrical shape with a conical bottom. A heater 16 and a pump inlet filter 17 are provided in the lower part thereof. Water can be discharged through the drain port 13 and / or the water pump 2, and water can be replenished through the water supply port 11. The water outlet 12 is located at the bottom of the water tank 1, the drain port 13 is located at the bottom of the water tank 1, the water inlet 18 is located at the top (in this embodiment, the top) or upper portion of the water tank 1, and the water replenishment port 11 is located at the top, upper portion, or middle portion (in this embodiment, the middle portion) of the water tank 1. The pump inlet filter 17 is connected to the water outlet 12. The heater 16 (specifically, an electric heater) and the pump inlet filter 17 (specifically, a cylindrical filter) are both horizontally arranged and located on the same horizontal plane to facilitate the placement of the gap 75.

[0027] Specifically, the water inlet of the water pump 2 is connected to the water outlet 12 via the inlet pipe 21. The water outlet is equipped with a master control valve 31, which provides three output paths. The first path is the water exchange pipe 22 (for water exchange), equipped with a water exchange valve 32 and a one-way valve 33. This path is connected to the centralized water station (for treatment and reuse, and after treatment, it can be sent to the cleaning fluid supply device). The second path is the cleaning water pipe 23 (for cleaning), equipped with a cleaning valve 34 and other components. This path is connected to the rotary joint 6. The third path is the water pipe 24 (for external water supply), equipped with a filter 3, a water valve 35, and a flow switch 36. This path is connected to the water supply device. The water supply port 11 is connected to the cleaning fluid supply device (for providing cleaning fluid) via the water supply pipe 25, equipped with a water supply valve 37 and other components. The drain port 13 is connected to the sewage treatment device via a drain pipe (for draining the water tank 1), equipped with a drain valve and other components. The sewage outlet of the water-using device is connected to the water inlet 18 through a pipeline.

[0028] Among them, the liquid level detection structure 4 is used to detect the liquid level in the water tank 1 (it is required to be able to detect at least four liquid levels, the working liquid level, the first liquid level, the second liquid level and the emptying liquid level). It is specifically a pressure sensor, which is arranged at the bottom of the water tank 1 or on the drain outlet 13 (preferably on the drain outlet 13).

[0029] The rotating shaft 5 is vertically arranged and coaxially arranged in the water tank 1. It rotates in the water tank 1. It is a tubular structure, one end of which is connected to the rotating joint 6 for rotation and sealing, and the other end is closed (suspended in the air or rotatably arranged on the water tank 1). The rotating joint 6 is fixed.

[0030] Among them, if there are multiple cleaning arms 7, the cleaning arms 7 are evenly distributed around the rotating shaft 5. Specifically, if there are two cleaning arms 7, the angle between the two cleaning arms 7 is 180°. It is preferably one cleaning arm 7. The cleaning arm 7 is arranged along the radial direction of the water tank 1. Specifically, the cleaning arm 7 includes a tank wall cleaning arm 71, a tank bottom cleaning arm 72, an upper connecting pipe 76 and a lower connecting pipe 77, etc. The tank wall cleaning arm 71 is located on the adjacent inner side of the side wall of the water tank 1. It is a tubular structure, and a plurality of first spray holes 73 are arranged side by side on its outer side along the direction in which it is located. Its two ends are closed and it is vertically arranged, with its upper end reaching the top of the water tank 1 and its lower end reaching above the pump inlet filter 17. The bottom wash arm 72 is located above and adjacent to the bottom of the water tank 1. It is a tubular structure with multiple second spray holes 74 arranged side by side along its underside. Its ends are closed. It is arranged obliquely upward from the inside to the outside and parallel to the conical bottom. Its outer end is adjacent to the inner side of the sidewall of the water tank 1 and is located below the heater 16 and the pump inlet filter 17. A clearance gap 75 is provided between the outer end of the bottom wash arm 72 and the lower end of the wall wash arm 71 to allow the heater 16 and the pump inlet filter 17 to pass through. An upper connecting pipe 76 is arranged horizontally along the radial direction of the water tank 1. Its inner end is connected to the upper portion of the rotating shaft 5, and its outer end is connected to the upper inner side of the wall wash arm 71. This is a tubular structure. A lower connecting pipe 77 is arranged radially along the water tank 1 and obliquely downward from the inside to the outside. Its inner end is connected to the lower portion of the rotating shaft 5, and its outer end is connected to the upper inner end of the bottom wash arm 72. This is a tubular structure. The first spray hole 73 and the second spray hole 74 are arranged obliquely opposite to the rotation direction of the washing arm 7 to drive the washing arm 7 to rotate.

[0031] When cleaning the water tank 1 , the water pump 2 and the corresponding valve are controlled according to the liquid level to supply water to the cleaning arm 7 , and the recoil force of the water spraying causes the cleaning arm 7 to rotate around the rotating shaft 5 . Example 2 See also Figure 1-6 , Example 2 provides a water supply device with a self-cleaning function, and its structure is basically the same as that of Example 1, except that: the number of the washing arm 7 in this embodiment is one.

[0032] Example 3 See also Figure 1-3Example 3 provides a water supply device with a self-cleaning function. Its structure is basically the same as that of Example 1, except that: in this embodiment, the top of the water tank 1 is provided with a fixed beam 14 along its radial direction, and the bottom and the lower end of the rotating shaft 5 are coaxially provided with a rotating seat 15, and the top is provided with a water inlet 18. The upper end of the rotating shaft 5 is connected to the rotating joint 6 in a rotational sealing manner, the lower end is closed and rotatably connected to the rotating seat 15, and the upper part is rotatably connected to the fixed beam 14. The rotating joint 6 is fixed to the fixed beam 14 by a bracket 19 (specifically, an L-shaped bracket). The rotating seat 15 is a cylindrical structure, which is located on the inner side adjacent to the washing arm 72 at the bottom of the tank and is provided with a drainage hole, which is connected to the drainage port 13.

[0033] Example 4 See also Figure 1-3 Example 4 provides a water supply device with a self-cleaning function. Its structure is essentially the same as that of Example 1, except that the water supply device in this example further includes an outer shell 8 and a base 9. A water tank 1 is disposed within the outer shell 8. A fixed cover is provided at the top, located on one side of a fixed beam 14. A removable cover (with a handle) is provided at the top, located on the other side of the fixed beam 14. Insulation material is filled between the cover and the outer shell 8. Both the fixed and movable covers are semicircular plates that fit into the water tank 1. The outer shell 8 is specifically a cubic structure. A water inlet 18 is provided on the fixed cover, near the fixed beam 14. The fixed beam 14 is located above the water tank 1, with its ends fixed to corresponding sides of the top of the outer shell 8. The base 9 is arranged side by side with the outer shell 8, parallel to its corresponding sides. The water pump 2 and the filter 3 are arranged side by side on the base 9. The water outlet 12 is located on the side of the water tank 1 near the base 9. The drain port 13 , the heater 16 and the water supply port 11 are located on the same side and are located on two vertical side surfaces of the water tank 1 along with the water outlet 12 .

[0034] Example 5 See also Figure 1-3 Example 5 provides a water supply device with a self-cleaning function. Its structure is basically the same as that of Example 4, except that: in this embodiment, the base 9 is located in front of the outer shell 8, and the fixed beam 14 is arranged in the front-to-back direction; the fixed cover plate is located to the right of the fixed beam 14, and the movable cover plate is located to the left of the fixed beam 14. The water pump 2 and filter 3 are arranged side by side. The water outlet 12 is located on the front side of the water tank 1. The drain port 13, heater 16, and water inlet 11 are all located on the right side of the water tank 1.

[0035] Example 6 Example 6 provides a water supply device with a self-cleaning function. Its structure is basically the same as that of Example 1, except that the angle between the first spray hole 73 and the cylindrical surface formed by the movement of the tank wall cleaning arm 71 is 30-45°, and the angle between the second spray hole 74 and the conical surface formed by the movement of the tank bottom cleaning arm 72 is 30-45°. The size of the first spray hole 73 is 1-4 mm, and the distance between two adjacent first spray holes 73 is 10-30 mm. The size of the second spray hole 74 is 1-4 mm, and the distance between two adjacent second spray holes 74 is 10-30 mm. The distance between the tank wall cleaning arm 71 and the side wall of the water tank 1 is 5-20 mm, and the distance between the tank bottom cleaning arm 72 and the bottom of the water tank 1 is 5-20 mm. The aforementioned parameters are not intended to be limiting of this patent and will be adjusted based on the size of the water tank 1, the pressure of the water pump 2, the size of the spray holes, and the setting density. The parameters must be adjusted to ensure that the cleaning arm 7 can rotate automatically, the sprayed liquid has a high spray pressure, and fully covers the corresponding surface.

[0036] Example 7 Example 7 provides a self-cleaning water supply device. Its structure is essentially the same as that of Example 1, except that the self-cleaning water supply device in this example is used in valve cleaning equipment. The dimensions of water tank 1 are: 800 mm in diameter and 500 mm in height. The output water pressure of water pump 2 is approximately 0.5 MPa.

[0037] Example 8 See also Figure 1-6 Embodiment 8 provides a self-cleaning method applicable to the water supply device with self-cleaning function disclosed in embodiments 1-7, the method comprising: S1: Pump 2 delivers the wastewater to the centralized water station. At this point, the wastewater is in the lower middle section and relatively clean, suitable for recycling. After the liquid level drops to a first level, the valve switches, and pump 2 delivers the wastewater to wash arm 7 (instead of discharging it to the centralized water station). Wash arm 7 rotates and cleans the inner wall of water tank 1. After a first predetermined cleaning time (e.g., 60 seconds), drain outlet 13 discharges the wastewater to the sewage treatment plant. At this point, wash arm 7 agitates the wastewater, making it contaminated and unrecyclable. When the wastewater drops to a second level, pump 2 stops supplying water to wash arm 7, and wash arm 7 stops rotating. This process achieves simultaneous drainage and cleaning.

[0038] When water pump 2 delivers wastewater to the centralized water station, water exchange valve 32 opens, and purge valve 34, water supply valve 35, and water replenishment valve 37 are all closed. When water pump 2 delivers wastewater to wash arm 7, water exchange valve 32 closes, while water pump 2 and purge valve 34 open. When drain outlet 13 drains wastewater, water pump 2, purge valve 34, and drain valve open, while water exchange valve 32 closes. When water pump 2 stops supplying water to wash arm 7, water pump 2, purge valve 34, and water exchange valve 32 close, while the drain valve opens.

[0039] S2: The drain outlet 13 continues to drain, and after the sewage is drained (to the drain level), the drainage stops. After the drainage is completed, the drain valve is closed.

[0040] S3: Water is replenished through the water replenishment port 11. Replenishment stops when the liquid level reaches the first level. Water pump 2 supplies water to the wash arm 7. After a second predetermined cleaning time (e.g., 120 seconds), the clean water is delivered to the centralized water station. Discharge stops when the water reaches the second level. At this point, the clean water is relatively clean and can be reused. When water is replenished through the water replenishment port 11, the water replenishment valve 37 is opened and the water pump 2 is closed. When water replenishment stops when the liquid level reaches the first level, the water replenishment valve 37 is closed. When water pump 2 supplies water to the wash arm 7, the water pump 2 and the wash valve 34 are opened, and the water exchange valve 32 is closed. When water pump 2 delivers clean water to the centralized water station, the water pump 2 and the water exchange valve 32 are opened, and the wash valve 34 is closed. When discharge stops when the water reaches the second level, the water pump 2, the water exchange valve 32, and the wash valve 34 are closed.

[0041] S4: Execute step S3 once or multiple times (the cleaning effect of this patent is better, usually once or twice is sufficient). After the last cleaning is completed, the clean water is not discharged. The clean water at this time is very clean and can be directly provided to the water-using device. The water supply port 11 is opened to replenish clean water to the working position liquid level (greater than the first liquid level).

[0042] Among them, in this patent, if the liquid level is high and the water resistance is large, the cleaning arm 7 may not rotate, and the water pressure sprayed from the nozzle is low, then the cleaning effect is poor, and the cleaning effect on the upper part of the water tank 1 is also poor. Therefore, the cleaning arm 7 needs the liquid level to be lower than a specific level before it can be activated. During cleaning, the water level cannot be too low. If it is too low, the water pump 2 cannot work normally or the output water pressure is low, and the cleaning effect is poor. The first liquid level is greater than the second liquid level and is lower than the highest liquid level at which the cleaning arm 7 can operate normally. The second liquid level is located above the water outlet 12 and is higher than the liquid level at which the water pump 2 cannot operate normally.

[0043] Example 9 Example 9 provides a self-cleaning method, the process of which is basically the same as that of Example 8, except that the first liquid level in this embodiment is 1 / 3-1 / 2 of the maximum liquid level of water tank 1, and the second liquid level is 1 / 8-1 / 3 of the maximum liquid level of water tank 1. This is not a limitation of this patent and can be set according to actual conditions.

[0044] The “first”, “second” and “third” in this embodiment are only used for distinction and have no other special meanings.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water supply device with a self-cleaning function, comprising a water tank (1), a water pump (2), a filter (3) and a plurality of valves, wherein the water tank (1) is provided with a water supply port (11), a water outlet (12) and a drain port (13), wherein the water outlet (12) is provided at the lower part of the water tank (1) and is connected to a water-using device via a pipeline with a water pump (2) and a filter (3), and the water tank (1) can discharge water to the outside through the drain port (13) and / or the water pump (2); characterized in that: The water tank (1) is in the shape of a cylinder; the device further comprises a liquid level detection structure (4), a rotating shaft (5) coaxially arranged in the water tank (1), a fixed rotating joint (6) and at least one cleaning arm (7) on the rotating shaft (5); the water outlet of the water pump (2) is also connected to the rotating joint (6) through a pipeline, and one end of the rotating shaft (5) is connected to the rotating joint (6) in a rotary sealing manner; the cleaning arm (7) comprises a tank wall cleaning arm (71) and a tank bottom cleaning arm (72); the tank wall cleaning arm (71) is located adjacent to the inner wall of the side wall of the water tank (1) The side of the water tank (1) has a plurality of first spray holes (73) arranged side by side on its outer side along the direction in which it is located; the bottom cleaning arm (72) is located adjacent to and above the bottom of the water tank (1), and a plurality of second spray holes (74) are arranged side by side on its lower side along the direction in which it is located; the first spray holes (73) and the second spray holes (74) are arranged obliquely with their backs to the rotation direction of the cleaning arm (7) to drive the cleaning arm (7) to rotate; when cleaning the water tank (1), the water pump (2) and the corresponding valve are controlled according to the liquid level to supply water to the cleaning arm (7), so that the cleaning arm (7) rotates around the rotating shaft (5).

2. The water supply device with self-cleaning function according to claim 1, characterized in that: The bottom of the water tank (1) is conical, forming a conical bottom. The tank wall cleaning arm (71) is arranged vertically, and the tank bottom cleaning arm (72) is arranged obliquely upward from the inside to the outside and is parallel to the conical bottom. A heater (16) and a pump inlet filter (17) are provided in the lower part of the water tank (1). The pump inlet filter (17) is connected to the water outlet (12). The heater (16) and the pump inlet filter (17) are both arranged horizontally and are located on the same horizontal plane. A clearance notch (75) is provided between the outer end of the tank bottom cleaning arm (72) and the lower end of the tank wall cleaning arm (71) for the heater (16) and the pump inlet filter (17) to pass through.

3. The water supply device with self-cleaning function according to claim 2, characterized in that: The number of the washing arm (7) is one, which is arranged along the radial direction of the water tank (1), and further comprises an upper connecting pipe (76) and a lower connecting pipe (77); the rotating shaft (5), the tank wall washing arm (71) and the tank bottom washing arm (72) are all tubular structures, and both ends of the tank wall washing arm (71) and the tank bottom washing arm (72) are closed; the upper connecting pipe (76) is arranged along the radial direction of the water tank (1), is arranged horizontally, and its inner end is connected to the upper part of the rotating shaft (5), and its outer end is connected to the inner side of the upper part of the tank wall washing arm (71); the lower connecting pipe (77) is arranged along the radial direction of the water tank (1), is arranged obliquely downward from the inside to the outside, and its inner end is connected to the lower part of the rotating shaft (5), and its outer end is connected to the upper side of the inner end of the tank bottom washing arm (72).

4. The water supply device with self-cleaning function according to claim 3, characterized in that: The top of the water tank (1) is provided with a fixed beam (14) along its radial direction, the bottom of the water tank (1) is provided with a rotating seat (15) coaxially located at the lower end of the rotating shaft (5), and the top of the water tank (1) is provided with a water inlet (18); the upper end of the rotating shaft (5) is connected to the rotating joint (6) in a rotating and sealed manner, the lower end of the rotating shaft (5) is closed and connected to the rotating seat (15), and the upper part of the rotating shaft (5) is connected to the fixed beam (14); the rotating joint (6) is fixed to the fixed beam (14) through a bracket (19); the rotating seat (15) is a cylindrical structure, which is located on the adjacent inner side of the cleaning arm (72) at the bottom of the tank, and is provided with a drainage hole, which is connected to the drainage port (13).

5. The water supply device with self-cleaning function according to claim 4, characterized in that: The device further comprises an outer shell (8) and a base (9); the water tank (1) is arranged in the outer shell (8); a fixed cover plate is provided on the top of the water tank and located on one side of the fixed beam (14); a movable cover plate is detachably provided on the top of the water tank and located on the other side of the fixed beam (14); a heat-insulating material is filled between the movable cover plate and the outer shell (8); the water inlet (18) is provided on the fixed cover plate and is arranged close to the fixed beam (14); the fixed beam (14) is located above the water tank (1) and has two ends. The water tank (1) is fixed on the corresponding side of the top of the outer shell (8); the base (9) is arranged side by side with the outer shell (8) and is parallel to the corresponding side of the outer shell (8); the water pump (2) and the filter (3) are arranged side by side on the base (9); the water outlet (12) is arranged on the side of the water tank (1) close to the base (9); the drain port (13), the heater (16) and the water supply port (11) are located on the same side and are respectively located on two side surfaces perpendicular to the water tank (1) with the water outlet (12).

6. The water supply device with self-cleaning function according to claim 1, characterized in that: The water inlet of the water pump (2) is connected to the water outlet (12) through a water inlet pipe (21), and a main control valve (31) is provided on the water outlet and the water is output in three ways; the first way is a water exchange pipe (22), which is provided with a water exchange valve (32) and a one-way valve (33), and is connected to a centralized water station; the second way is a cleaning water pipe (23), which is provided with a cleaning valve (34), and is connected to a rotary joint (6); the third way is a water pipe (24), which is provided with a filter (3), a water valve (35) and a flow switch (36), and is connected to a water device; the water replenishment port (11) is connected to a cleaning liquid supply device through a water replenishment pipe (25), and a water replenishment valve (37) is provided on the water replenishment pipe (25); the drain port (13) is connected to a sewage treatment device through a drain pipe, and a drain valve is provided on the drain pipe.

7. The water supply device with self-cleaning function according to claim 1, characterized in that: The liquid level detection structure (4) is a pressure sensor, which is arranged on the bottom of the water tank (1) or on the drain outlet (13).

8. The water supply device with self-cleaning function according to claim 1, characterized in that: The angle between the first spray hole (73) and the cylindrical surface formed by the movement of the tank wall cleaning arm (71) is 30-45°, and the angle between the second spray hole (74) and the conical surface formed by the movement of the tank bottom cleaning arm (72) is 30-45°; the size of the first spray hole (73) is 1-4 mm, and the distance between two adjacent first spray holes (73) is 10-30 mm; the size of the second spray hole (74) is 1-4 mm, and the distance between two adjacent second spray holes (74) is 10-30 mm; the distance between the tank wall cleaning arm (71) and the side wall of the water tank (1) is 5-20 mm, and the distance between the tank bottom cleaning arm (72) and the bottom of the water tank (1) is 5-20 mm.

9. The self-cleaning method for a water supply device with a self-cleaning function according to any one of claims 1 to 8, characterized in that: The method comprises: S1: The water pump (2) delivers the sewage to the centralized water station. After the liquid level drops to a first level, the water pump (2) delivers the sewage to the washing arm (7). The washing arm (7) rotates and cleans the inner wall of the water tank (1). After a first predetermined cleaning time, the drain port (13) drains the water outward. When the sewage drops to a second level, the water pump (2) stops supplying water to the washing arm (7), and the washing arm (7) stops rotating. S2: The drain outlet (13) continues to drain, and stops draining after the sewage is drained; S3: water is replenished through the water replenishment port (11), and the replenishment is stopped when the liquid level rises to the first liquid level; the water pump (2) supplies water to the cleaning arm (7), and after cleaning for a second predetermined time, the water pump (2) sends clean water to the centralized water station, and stops draining when the liquid level reaches the second liquid level; S4: Execute step S3 once or multiple times. After the last cleaning is completed, the clean water is not discharged; The first liquid level is greater than the second liquid level and is lower than the highest liquid level at which the cleaning arm (7) can operate normally, and the second liquid level is located above the water outlet (12) and is higher than the liquid level at which the water pump (2) cannot operate normally.

10. The method according to claim 9, characterized in that In step S1, when the water pump (2) delivers sewage to the centralized water station, the water exchange valve (32) is opened, and the cleaning valve (34), the water valve (35) and the water supply valve (37) are all closed; when the water pump (2) delivers sewage to the washing arm (7), the water exchange valve (32) is closed, and the water pump (2) and the cleaning valve (34) are opened; when the drain port (13) drains water outward, the water pump (2), the cleaning valve (34) and the drain valve are opened, and the water exchange valve (32) is closed; when the water pump (2) stops supplying water to the washing arm (7), the water pump (2), the cleaning valve (34) and the water exchange valve (32) are closed, and the drain valve is opened; In step S2, after the drainage is completed, the drainage valve is closed; In step S3, when water is replenished through the water replenishment port (11), the water replenishment valve (37) is opened and the water pump (2) is closed; when water replenishment is stopped when the liquid level rises to a first liquid level, the water replenishment valve (37) is closed; when the water pump (2) supplies water to the washing arm (7), the water pump (2) and the washing valve (34) are opened and the water exchange valve (32) is closed; when the water pump (2) delivers clean water to the centralized water station, the water pump (2) and the water exchange valve (32) are opened and the washing valve (34) is closed; when water drainage is stopped when the water level reaches a second liquid level, the water pump (2), the water exchange valve (32) and the washing valve (34) are closed.

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