Automatic filter cleaning

Abstract

The utility model discloses an automatic cleaning filter, which belongs to the technical field of sewage treatment equipment. It solves the defects of the traditional filter in the prior art that the internal filter components become smelly and dirty after long-term use due to being stationary, and wastes manpower and material resources when replacing quartz sand. Its main structure includes a base frame, a lower cover plate is arranged at the lower end of the base frame, a sewage outlet is arranged at the bottom of the lower cover plate, a backwashing peripheral plate and a filter box arranged inside the backwashing peripheral plate are arranged at the upper end of the base frame, a gap for filtered water to pass through is arranged between the filter box and the lower cover plate, and the filter box is installed above the lower cover plate through more than one bracket; a water injection port for sewage is arranged at the upper end of the filter box, and a filtered water outlet for discharging clean water after filtration is arranged on the outer wall of the backwashing peripheral plate. The utility model is mainly used for purifying water in a bath or indoor swimming pool.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment equipment, and in particular relates to an automatic cleaning filter. Background Art

[0002] The water in a large bathtub or indoor swimming pool will become dirty after long-term use. Therefore, in order to save costs, a small bathtub needs to purify the water and reuse it or use it for other purposes. In the prior art, a sand tank is generally used for purification, but the filter component inside the sand tank is stationary, and after long-term use, it will become smelly and dirty, and the reuse efficiency is low.

[0003] For example, a Chinese utility model patent with authorization announcement number CN210583836U discloses an automatic cleaning filter, which uses a motor to drive the central shaft and a cleaning roller to stir up dirt such as mud or floating objects in the quartz sand, and continuously rinses it with water to purify the quartz sand. The stirring is driven by a motor, which saves time and effort and does not require manual operation. The water inlet and outlet for forward flushing and back flushing are achieved through the sieve holes on the sieve plate, and the stirred fine sand is discharged through the sewage outlet at the bottom. However, its disadvantage is that since the outlet pipe is arranged at the bottom, the filtered water is easily mixed with heavier impurities such as crushed sand, and the filtration is not thorough, and then enters the bathtub and causes customer dissatisfaction. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an automatic cleaning filter.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] An automatic cleaning filter comprises a base frame, a lower cover plate is arranged at the lower end of the base frame, a sewage outlet is arranged at the bottom of the lower cover plate, a backwashing peripheral plate and a filter box body arranged inside the backwashing peripheral plate are arranged at the upper end of the base frame, a gap for filtered water to pass through is arranged between the filter box body and the lower cover plate, and the filter box body is installed above the lower cover plate through more than one bracket; a water injection port for sewage is arranged at the upper end of the filter box body, and a filtered water outlet for discharging clean water after filtration is arranged on the outer side wall of the backwashing peripheral plate.

[0007] Preferably, a cleaning port is also provided on the side wall of the backwash peripheral plate.

[0008] Preferably, the cleaning port comprises a positive flushing water inlet and a positive flushing water outlet, the positive flushing water inlet is connected to the interior of the filter housing, and the positive flushing water outlet is connected to the cavity between the reverse flushing peripheral plate and the filter housing.

[0009] Preferably, the cleaning port further comprises a backwashing water inlet and a backwashing water outlet, the backwashing water inlet is connected to the cavity between the backwashing peripheral plate and the filter housing, and the backwashing water outlet is connected to the interior of the filter housing.

[0010] Preferably, a pressure gauge for measuring the water pressure inside the filter box is provided at the upper end of the filter box.

[0011] Preferably, an inspection port is provided on the side wall of the filter box, and a sand adding port is provided on the upper end of the filter box.

[0012] Preferably, a stirring and cleaning mechanism is provided inside the filter box.

[0013] Preferably, the stirring and cleaning mechanism comprises a central shaft, a cleaning roller mounted on the central shaft and a sieve plate arranged at the bottom of the filter box, the lower end of the central shaft is rotatably mounted on the sieve plate, and the upper end passes through the top of the filter box.

[0014] Preferably, the central axis passes through the upper end of the filter box and is connected to the motor, and quartz sand is provided above the sieve plate.

[0015] Preferably, the lower cover plate is a truncated cone structure or a concave arc structure.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. When filtering water normally, the filtered water enters the cavity between the backwash outer plate and the filter box through the gap between the filter box and the lower cover plate. As the water in the filter box continues to be added, the water between the backwash outer plate and the filter box continues to rise, and finally connects the outlet pipe from the filtered water outlet to return to the public bath or indoor swimming pool or other devices. The filtered water outlet is set at the top, and the quartz sand and crushed sand flow out from the sewage outlet below due to gravity, which prevents the quartz sand from flowing out from the filtered water outlet above, ensuring a clean water source;

[0018] 2. A pressure gauge for measuring the water pressure inside the filter box is set at the upper end of the filter box. When there is a lot of dirt in the quartz sand, the filtering effect is poor and the filtering is slow, which will lead to a higher internal water pressure. Therefore, when the pressure of the pressure gauge is higher than the normal value, it indicates that the quartz sand needs to be cleaned;

[0019] 3. The sand, mud or floating objects are stirred up by the cleaning roller. After stirring, some quartz sand and dirt will flow out from the drainage port below to prevent sand from entering the bathtub;

[0020] 4. Through the positive flushing water inlet and the positive flushing water outlet, water is inletted from the upper end and outletd from the lower end, so as to wash away the heavier dirt or mud and complete the positive flushing;

[0021] 5. Through the backwash inlet and outlet, water can be inletted from the bottom and outletd from the top, so that lighter floating objects that cannot be washed away by positive flushing can be floated up and finally flow out through the backwash outlet above to complete the backwashing without human supervision, thus realizing automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the front view of the utility model;

[0023] Figure 2 It is a right side view of the utility model;

[0024] Figure 3 It is a top view of the utility model;

[0025] Figure 4 for Figure 3 Cross-sectional view of the middle tube AA;

[0026] Figure 5 for Figure 3 Cross-sectional view of the middle tube BB.

[0027] In the figure: 1. Backwash outer plate; 2. Filter box; 3. Pressure gauge; 4. Water filling port; 5. Stirring and cleaning mechanism; 6. Sand adding port; 7. Inspection port; 8. Lower cover plate; 9. Drain port; 10. Base frame; 11. Forward flushing water inlet; 12. Backwashing water inlet; 13. Backwashing water outlet; 14. Forward flushing water outlet; 15. Filtered water outlet; 16. Bracket; 51. Cleaning roller; 52. Quartz sand; 53. Sieve plate; 54. Center shaft; 55. Motor. DETAILED DESCRIPTION

[0028] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0029] Embodiment 1:

[0030] like Figure 1-5 As shown, an automatic cleaning filter comprises a base frame 10, a lower cover plate 8 is arranged at the lower end of the base frame 10, a sewage outlet 9 is arranged at the bottom of the lower cover plate 8, a backwashing peripheral plate 1 and a filter box body 2 arranged inside the backwashing peripheral plate 1 are arranged at the upper end of the base frame 10, a gap for filtered water to pass through is arranged between the filter box body 2 and the lower cover plate 8, and the filter box body 2 is installed above the lower cover plate 8 through more than one bracket 16; a water injection port 4 for sewage is arranged at the upper end of the filter box body 2, and a filtered water outlet 15 for discharging clean water after filtration is arranged on the outer side wall of the backwashing peripheral plate 1.

[0031] Embodiment 2:

[0032] An automatic cleaning filter, which is different from Example 1 in that a cleaning port is also provided on the side wall of the backwashing outer plate 1.

[0033] Further, the cleaning port includes a forward flushing water inlet 11 and a forward flushing water outlet 14, wherein the forward flushing water inlet 11 is connected to the interior of the filter housing 2, and the forward flushing water outlet 14 is connected to the cavity between the reverse flushing outer plate 1 and the filter housing 2; the cleaning port also includes a backwashing water inlet 12 and a backwashing water outlet 13, wherein the backwashing water inlet 12 is connected to the cavity between the reverse flushing outer plate 1 and the filter housing 2, and the backwashing water outlet 13 is connected to the interior of the filter housing 2. Switch valves are installed on the forward flushing water inlet 11, the forward flushing water outlet 14, the backwashing water inlet 12, the backwashing water outlet 13, the filtered water outlet 15 and the sewage outlet 9, wherein the switch valves may be solenoid valves or manual valves.

[0034] Furthermore, a pressure gauge 3 for measuring the water pressure inside the filter box 2 is provided at the upper end of the filter box 2. When there is a lot of dirt in the quartz sand 52, the filtering effect is poor and the filtration is slow, which will cause the internal water pressure to be higher. Therefore, when the pressure of the pressure gauge 3 is higher than the normal value, it indicates that the quartz sand 52 needs to be cleaned.

[0035] Furthermore, an inspection port 7 is provided on the side wall of the filter box 2, through which the sand inside can be scooped out, which is convenient for inspection and sand replacement; a sand adding port 6 is also provided at the upper end of the filter box 2.

[0036] Furthermore, a stirring and cleaning mechanism 5 is provided inside the filter box 2, and the stirring and cleaning mechanism 5 includes a central shaft 54, a cleaning roller 51 mounted on the central shaft 54, and a sieve plate 53 arranged at the bottom of the filter box 2. The lower end of the central shaft 54 ​​is rotatably mounted on the sieve plate 53, and the upper end passes through the top of the filter box 2. The central shaft 54 ​​passes through the upper end of the filter box 2 and is connected to the motor 55 through a reducer. The motor 55 and the reducer are installed above the filter box 2 through a bracket, and quartz sand 52 is arranged above the sieve plate 53. In this embodiment, sand, mud or floating objects are stirred up by stirring of the cleaning roller 51, and some quartz sand and dirt after stirring flow out from the sewage outlet 9 below.

[0037] Furthermore, the lower cover plate 8 is a truncated cone structure or a concave arc structure.

[0038] When installed and used, the utility model is vertically fixed on the ground through the base frame 10, or installed in the shell, but the water inlet 4, the sewage outlet 9, the positive flushing water inlet 11, the positive flushing water outlet 14, the backwashing water inlet 12, the backwashing water outlet 13, and the filtered water outlet 15 should extend out of the shell to facilitate the connection with other pipes to clean the internal sand or filter the sewage, and a control box is also installed on the outer wall of the shell, and various buttons are set on the control box for easy operation.

[0039] The working principle of the utility model is:

[0040] Quartz sand 52 is added to the interior of the filter box 2 through the sand adding port 6, and the water from the public bath or indoor swimming pool is connected to the water injection port 4 through a pipeline. When the water quality is normally filtered, the motor 55 and the central axis 54 are stationary, and the filtered water enters the cavity between the backwashing outer plate 1 and the filter box 2 through the gap between the filter box 2 and the lower cover plate 8. As the water in the filter box 2 continues to be added, the water between the backwashing outer plate 1 and the filter box 2 continues to rise, and finally connects the outlet pipe from the filtered water outlet 15 to return to the public bath or indoor swimming pool or other device. When the pressure value of the pressure gauge 3 is large after using it for a period of time (when there is a lot of dirt in the quartz sand 52, the filtering effect is poor, the filtering is slow, and the internal water pressure is relatively large), the internal quartz sand 52 can be cleaned.

[0041] First, close the switch valves on the water injection port 4, the sewage outlet 9, the backwash water inlet 12, the backwash water outlet 13, and the filtered water outlet 15, then connect the clean tap water to the positive flushing water inlet 11 and open the switch valve on the positive flushing water inlet 11, then press the start button and the start button of the motor 55, the central shaft 54 ​​starts to rotate and drives the cleaning roller 51 to rotate and stir the quartz sand 52, the clean tap water enters the cavity inside the filter box 2 along the positive flushing water inlet 11, and the mud or fine sand falls through the sieve holes on the sieve plate 53, and the fine sand can be discharged through the sewage outlet 9, and the dirty water enters the cavity between the backwashing outer plate 1 and the filter box 2 through the gap between the filter box 2 and the lower cover plate 8, and flows out from the positive flushing outlet 14 below, completing the positive flushing action;

[0042] After the positive flushing is completed, the stop button is pressed, the switch valves on the positive flushing water inlet 11 and the positive flushing water outlet 14 are closed, and the water inlet is stopped. Then the switch valves on the backwashing water inlet 12 and the backwashing water outlet 13 are opened, and the clean tap water first enters the cavity between the backwashing outer plate 1 and the filter box 2 along the backwashing water inlet 12 at the lower end. As the internal water flow increases, it gradually enters the gap between the filter box 2 and the lower cover plate 8 and flows upward into the filter box 2. Under the continuous stirring of the cleaning roller 51, some floating objects that were not washed away during the positive flushing operation float on the water surface and flow out along the backwashing water outlet 13 above. When the water flowing out at last is clean water, it indicates that the quartz sand 52 has been rinsed clean. Press the stop button, close the switch valves on the backwashing water inlet 12 and the backwashing water outlet 13, and complete the backwashing action; finally, turn off the motor 55.

Claims

1. An automatic cleaning filter, comprising a base frame (10), a lower cover plate (8) being arranged at the lower end of the base frame (10), a sewage outlet (9) being arranged at the bottom of the lower cover plate (8), characterized in that: The upper end of the base frame (10) is provided with a backwashing peripheral plate (1) and a filter box (2) arranged inside the backwashing peripheral plate (1); a gap for filtered water to pass through is provided between the filter box (2) and the lower cover plate (8); and the filter box (2) is installed above the lower cover plate (8) through one or more brackets (16); the upper end of the filter box (2) is provided with a water injection port (4) for sewage inlet, and the outer side wall of the backwashing peripheral plate (1) is provided with a filtered water outlet (15) for discharging filtered clean water.

2. The automatic cleaning filter according to claim 1, characterized in that: A cleaning port is also provided on the side wall of the backwash peripheral plate (1).

3. The automatic cleaning filter according to claim 2, characterized in that: The cleaning port comprises a positive flushing water inlet (11) and a positive flushing water outlet (14); the positive flushing water inlet (11) is connected to the interior of the filter housing (2); and the positive flushing water outlet (14) is connected to the cavity between the reverse flushing peripheral plate (1) and the filter housing (2).

4. The automatic cleaning filter according to claim 3, characterized in that: The cleaning port also includes a backwash water inlet (12) and a backwash water outlet (13); the backwash water inlet (12) is connected to the cavity between the backwash outer plate (1) and the filter box (2); and the backwash water outlet (13) is connected to the interior of the filter box (2).

5. The automatic cleaning filter according to claim 2, characterized in that: A pressure gauge (3) for measuring the internal water pressure of the filter box (2) is provided at the upper end of the filter box (2).

6. The automatic cleaning filter according to any one of claims 1 to 5, characterized in that: The side wall of the filter box (2) is also provided with an inspection port (7), and the upper end of the filter box (2) is also provided with a sand adding port (6).

7. The automatic cleaning filter according to any one of claims 1 to 5, characterized in that: A stirring and cleaning mechanism (5) is provided inside the filter box (2).

8. The automatic cleaning filter according to claim 7, characterized in that: The stirring and cleaning mechanism (5) comprises a central shaft (54), a cleaning roller (51) mounted on the central shaft (54), and a sieve plate (53) arranged at the bottom of the filter box (2); the lower end of the central shaft (54) is rotatably mounted on the sieve plate (53), and the upper end passes through the top of the filter box (2).

9. The automatic cleaning filter according to claim 8, characterized in that: The central axis (54) passes through the upper end of the filter box (2) and is connected to the motor (55). Quartz sand (52) is provided above the sieve plate (53).

10. The automatic cleaning filter according to any one of claims 1 to 5, characterized in that: The lower cover plate (8) is a truncated cone structure or a concave arc structure.

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