Divided-flow type filtering device with backwashing and self-cleaning functions

Abstract

The invention relates to a split-flow type filtering device with backwashing and self-cleaning functions, which is suitable for liquid filtering devices, such as pre-filters, ultrafiltration water purifiers and the like. Comprising a flushing knob (1), a valve core (2), an upper cylinder body (3), a filter core assembly (4), a lower cylinder body (5), a sealing element (6) and a blow-down valve (7), a valve core mounting hole (3-1) is formed in the center of the upper part of the upper barrel body (3), the valve core (2) is mounted in the valve core mounting hole (3-1), and the flushing knob (1) is mounted at the upper end part of the valve core (2); a threaded sleeve (3-4) is arranged on the lower portion of the upper barrel body (3) and provided with internal threads, a threaded connecting end (5-1) is arranged on the upper end portion of the lower barrel body (5), a drain outlet (5-2) is formed in the lower end portion of the lower barrel body (5), and a drain valve (7) is installed on the drain outlet (5-2). The upper end of the lower cylinder (5) is provided with a threaded connection end (5-1) which is hermetically connected with a threaded sleeve (3-4) which is arranged on the lower portion of the upper cylinder (3) through a sealing piece (6) to form a sealed cylinder.

Description

Technical Field

[0001] The invention relates to a split-flow filtering device with backwashing and self-cleaning functions. This structure is particularly suitable for general liquid filtering devices, such as pre-filters, ultrafiltration water purifiers, etc. Background Art

[0002] The key technology of liquid filtration lies in impurity discharge. At present, the main design is diverter design or backwash design, with two technical solutions: diverter forward flushing and backwashing. Forward flushing is easy to automate, but the flushing is not thorough, and impurities are embedded in the filter mesh to form blockage. Backwashing requires multiple valves to control, and the failure rate is relatively high.

[0003] Currently, various types of liquid filters cannot be backwashed or the backwashing structure is too complicated, and the effect is not good during forward flushing. Summary of the invention

[0004] The purpose of the present invention is to provide a split-flow filter device with backwashing and self-cleaning functions to address the above-mentioned shortcomings. The present invention is aimed at various types of liquid filters that cannot be backwashed or the backwashing structure is too complicated, and the effect is not good during positive flushing. The present invention uses a designed rotary valve core to change the direction of water flow by switching different working positions to backwash the cylindrical filter element; a cleaning "scraper" is provided inside the filter element, and rotating blades are provided above and below the central axis of the "scraper". During positive flushing, the rotating blades are flushed and rotated by the water flow, driving the "scraper" to clean the debris inside the filter element, playing a self-cleaning role.

[0005] The split-flow filter device with backwashing and self-cleaning functions of the present invention is realized by adopting the following technical solutions: The split-flow filtering device with backwashing and self-cleaning functions comprises a flushing knob 1, a valve core 2, an upper cylinder 3, a filter element assembly 4, a lower cylinder 5, a sealing element 6 and a drain valve 7.

[0006] The center of the upper part of the upper cylinder 3 is provided with a valve core mounting hole 3-1, the valve core 2 is installed in the valve core mounting hole 3-1, the flushing knob 1 is installed on the upper end of the valve core 2, and the upper two sides of the upper part of the upper cylinder 3 are respectively provided with a water inlet 3-2 and a water outlet 3-3.

[0007] The upper cylinder 3 is provided with a threaded sleeve 3-4 at the lower part, the threaded sleeve 3-4 is provided with an internal thread, the upper end of the lower cylinder 5 is provided with a threaded connection end 5-1, the lower end of the lower cylinder 5 is provided with a sewage outlet 5-2, and the sewage outlet 5-2 is equipped with a sewage valve 7 for sewage discharge during backwashing. The threaded connection end 5-1 provided at the upper end of the lower cylinder 5 and the threaded sleeve 3-4 provided at the lower part of the upper cylinder 3 are sealed and connected through a sealing member 6 to form a sealed cylinder. The sealing member 6 adopts an elastic sealing ring.

[0008] The filter element assembly 4 is installed in a sealed cylinder formed by the upper cylinder 3 and the lower cylinder 3.

[0009] The filter element assembly 4 is composed of an upper impeller 4-1, a filter element body 4-2, a filter screen 4-3, a scraper 4-4, a lower impeller 4-5, a central shaft 4-6, an upper central shaft mounting plate 4-7, a lower central shaft mounting plate 4-8, an upper impeller mounting sleeve 4-9, and a lower impeller mounting sleeve 4-10.

[0010] The upper center axis mounting plate 4-7 and the lower center axis mounting plate 4-8 are both provided with a center axis mounting hole and a water through hole.

[0011] The upper part of the filter element body 4-2 is provided with an upper impeller mounting seat 4-2-1, and the lower part of the filter element body 4-2 is provided with a lower impeller mounting seat 4-2-2. The filter element body 4-2 is provided in a barrel frame shape, and a plurality of water passages are provided on the filter element body 4-2.

[0012] The filter screen 4-3 is installed in the filter element body 4-2, and multiple scrapers 4-4 are fixedly installed on the central shaft 4-6. The central shaft 4-6 together with the multiple scrapers 4-4 are installed in the middle of the filter screen 4-3 in the filter element body 4-2. The upper central shaft mounting plate 4-7 is installed in the upper impeller mounting seat 4-2-1 on the upper part of the filter element body 4-2. The upper end of the central shaft 4-6 is installed in the central shaft mounting hole of the upper central shaft mounting plate 4-7. The lower central shaft mounting plate 4-8 is installed in the upper impeller mounting seat 4-2-2 on the lower part of the filter element body 4-2. The lower end of the central shaft 4-6 is installed in the central shaft mounting hole of the lower central shaft mounting plate 4-8.

[0013] The upper impeller 4-1 is fixedly mounted on the upper end of the central shaft 4-6, and the upper impeller mounting sleeve 4-9 is sleeved on the outer ring of the upper impeller 4-1 and mounted on the upper impeller mounting seat 4-2-1 on the upper part of the filter element body 4-2; The lower impeller 4-6 is fixedly installed at the lower end of the central shaft 4-6, and the lower impeller mounting sleeve 4-10 is sleeved on the outer ring of the lower impeller 4-6 and is installed on the lower impeller mounting seat 4-2-2 at the lower part of the filter element body 4-2.

[0014] The filter screen 4-3 is made of 20-100 mesh 304 stainless steel filter screen.

[0015] The scraper 4-4 is provided with a rubber scraper or a brush structure.

[0016] The upper impeller 4-1 and the lower impeller 4-5 are provided with a plurality of impeller blades.

[0017] The valve core 2 is provided with a flushing channel 2-1 and a working channel 2-2.

[0018] Working principle: When the split-flow filter device with backwashing and self-cleaning functions is working: the flushing knob 1 is in the working position, the drain valve 7 is closed, and the water outlet 3-3 is opened. The liquid enters from the water inlet 3-2 of the upper cylinder 3, passes through the working channel 2-2 of the valve core 2, enters the filter body 4-2 from the impeller 4-1 on the filter element assembly 4, passes through the filter screen 4-3, and finally flows out from the water outlet 3-3 of the upper cylinder 3.

[0019] In the self-cleaning state: the flushing knob 1 is in the working position, the drain valve 7 is open, and the water outlet 3-3 is closed. The liquid enters from the water inlet 3-2 of the upper cylinder 3, passes through the working channel 2-2 of the valve core 2, enters the filter element body 4-2 from the upper impeller 4-1 of the filter element assembly 4, passes through the lower impeller 4-5, and finally flows out from the drain valve 7. Driven by the liquid, the upper impeller 4-1 and the lower impeller 4-5 rotate, driving the central shaft 4-6 to rotate, and the scraper 4-4 rotates to brush and clean the inside of the filter screen.

[0020] Backwashing state: the flushing knob 1 is in the flushing position, the drain valve 7 is open, and the water outlet 3-3 is closed. The liquid enters from the water inlet 3-2 of the upper cylinder 3, passes through the valve core 2 industrial flushing channel 2-1, passes through the interior of the upper cylinder, enters the filter element body 4-2 from the filter element filter screen 4-3, passes through the lower impeller 4-5, and finally flows out from the drain valve 7. Under the flushing of the liquid, the impurities on the filter screen 4-3 are flushed and discharged from the drain outlet 7.

[0021] The split-flow filter device with backwashing and self-cleaning functions of the present invention has reasonable design, compact structure, reliable performance and is easy to use. It aims to solve the problem that various types of liquid filters cannot be backwashed or the backwashing structure is too complicated, and the effect is not good during forward flushing. The present invention uses a designed rotary valve core to change the direction of water flow by switching different working positions to backwash the cylindrical filter element; a cleaning "scraper" is provided inside the filter element, and rotating blades are provided above and below the central axis. During forward flushing, the rotating blades are flushed and rotated by the water flow, driving the "scraper" to clean the debris inside the filter element, thereby achieving a self-cleaning effect.

[0022] The split-flow filter device with backwashing and self-cleaning functions is particularly suitable for general liquid filtration devices, such as pre-filters, ultrafiltration water purifiers, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a structural diagram of a split-flow filter device with backwashing and self-cleaning functions; Figure 2 It is a schematic diagram of the valve core structure of a split-flow filter device with backwashing and self-cleaning functions; Figure 3 This is a schematic diagram of the upper cylinder structure of a split-flow filter device with backwashing and self-cleaning functions; Figure 4 It is a schematic diagram of the filter element structure of a split-flow filter device with backwashing and self-cleaning functions; Figure 5 It is a schematic diagram of the structure of the filter element of a split-flow filter device with backwashing and self-cleaning functions; Figure 6 It is a schematic diagram of the lower cylinder of a split-flow filter device with backwashing and self-cleaning functions; Figure 7 It is a schematic diagram of the water flow direction of a split-flow filter device with backwashing and self-cleaning functions in several working positions; Figure 8 This is a schematic diagram of the application scenario of a split-flow filter device with backwashing and self-cleaning functions.

[0024] In the figure: 1. flushing knob, 2. valve core, 3. upper cylinder, 4. filter element assembly, 5. lower cylinder, 6. seal, 7. drain valve, 8. split-flow filter device with backwashing and self-cleaning functions, 9. sink, 10. vegetable sink faucet, 11. cold water angle valve, 12. hot water angle valve, 13. drinking water valve; 3-1, valve core installation hole, 3-2, water inlet, 3-3, water outlet, 3-4, threaded sleeve; 4-1, upper impeller, 4-2, filter element body, 4-3, filter screen, 4-4, scraper, 4-5, lower impeller, 4-6, center shaft, 4-7, upper center shaft mounting plate, 4-8, lower center shaft mounting plate, 4-9, upper impeller mounting sleeve, 4-10, lower impeller mounting sleeve; 4-2-1, upper impeller mounting seat, 4-2-2, lower impeller mounting seat; 5-1, threaded connection end, 5-2, drain outlet. DETAILED DESCRIPTION

[0025] See attached Figure 1-8 The split-flow filtering device with backwashing and self-cleaning functions includes a flushing knob 1, a valve core 2, an upper cylinder 3, a filter element assembly 4, a lower cylinder 5, a sealing member 6, and a drain valve 7.

[0026] The center of the upper part of the upper cylinder 3 is provided with a valve core mounting hole 3-1, the valve core 2 is installed in the valve core mounting hole 3-1, the flushing knob 1 is installed on the upper end of the valve core 2, and the upper two sides of the upper part of the upper cylinder 3 are respectively provided with a water inlet 3-2 and a water outlet 3-3.

[0027] The upper cylinder 3 is provided with a threaded sleeve 3-4 at the lower part, the threaded sleeve 3-4 is provided with an internal thread, the upper end of the lower cylinder 5 is provided with a threaded connection end 5-1, the lower end of the lower cylinder 5 is provided with a sewage outlet 5-2, and the sewage outlet 5-2 is equipped with a sewage valve 7 for sewage discharge during backwashing. The threaded connection end 5-1 provided at the upper end of the lower cylinder 5 and the threaded sleeve 3-4 provided at the lower part of the upper cylinder 3 are sealed and connected through a sealing member 6 to form a sealed cylinder. The sealing member 6 adopts an elastic sealing ring.

[0028] The filter element assembly 4 is installed in a sealed cylinder formed by the upper cylinder 3 and the lower cylinder 3.

[0029] The filter element assembly 4 is composed of an upper impeller 4-1, a filter element body 4-2, a filter screen 4-3, a scraper 4-4, a lower impeller 4-5, a central shaft 4-6, an upper central shaft mounting plate 4-7, a lower central shaft mounting plate 4-8, an upper impeller mounting sleeve 4-9, and a lower impeller mounting sleeve 4-10.

[0030] The upper center axis mounting plate 4-7 and the lower center axis mounting plate 4-8 are both provided with a center axis mounting hole and a water through hole.

[0031] The upper part of the filter element body 4-2 is provided with an upper impeller mounting seat 4-2-1, and the lower part of the filter element body 4-2 is provided with a lower impeller mounting seat 4-2-2. The filter element body 4-2 is provided in a barrel frame shape, and a plurality of water passages are provided on the filter element body 4-2.

[0032] The filter screen 4-3 is installed in the filter element body 4-2, and multiple scrapers 4-4 are fixedly installed on the central shaft 4-6. The central shaft 4-6 together with the multiple scrapers 4-4 are installed in the middle of the filter screen 4-3 in the filter element body 4-2. The upper central shaft mounting plate 4-7 is installed in the upper impeller mounting seat 4-2-1 on the upper part of the filter element body 4-2, and the upper end of the central shaft 4-6 is installed in the central shaft mounting hole of the upper central shaft mounting plate 4-7. The lower central shaft mounting plate 4-8 is installed in the lower impeller mounting seat 4-2-2 at the lower part of the filter element body 4-2, and the lower end of the central shaft 4-6 is installed in the central shaft mounting hole of the lower central shaft mounting plate 4-8.

[0033] The upper impeller 4-1 is fixedly mounted on the upper end of the central shaft 4-6, and the upper impeller mounting sleeve 4-9 is sleeved on the outer ring of the upper impeller 4-1 and mounted on the upper impeller mounting seat 4-2-1 on the upper part of the filter element body 4-2; The lower impeller 4-6 is fixedly installed at the lower end of the central shaft 4-6, and the lower impeller mounting sleeve 4-10 is sleeved on the outer ring of the lower impeller 4-6 and is installed on the lower impeller mounting seat 4-2-2 at the lower part of the filter element body 4-2.

[0034] The filter screen 4-3 is made of 20-100 mesh 304 stainless steel filter screen.

[0035] The scraper 4-4 is provided with a rubber scraper or a brush structure.

[0036] The upper impeller 4-1 and the lower impeller 4-5 are provided with a plurality of impeller blades.

[0037] The valve core 2 is provided with a flushing channel 2-1 and a working channel 2-2.

[0038] When the split-flow filter device with backwashing and self-cleaning functions is working, the flushing knob 1 is in the working position, the drain valve 7 is closed, and the water outlet 3-3 is opened. The liquid enters from the water inlet 3-2 of the upper cylinder 3, passes through the working channel 2-2 of the valve core 2, enters the filter element body 4-2 from the impeller 4-1 on the filter element assembly 4, passes through the filter screen 4-3, and finally flows out from the water outlet 3-3 of the upper cylinder 3.

[0039] In the self-cleaning state: the flushing knob 1 is in the working position, the drain valve 7 is open, and the water outlet 3-3 is closed. The liquid enters from the water inlet 3-2 of the upper cylinder 3, passes through the working channel 2-2 of the valve core 2, enters the filter element body 4-2 from the upper impeller 4-1 of the filter element assembly 4, passes through the lower impeller 4-5, and finally flows out from the drain valve 7. Driven by the liquid, the upper impeller 4-1 and the lower impeller 4-5 rotate, driving the central shaft 4-6 to rotate, and the scraper 4-4 rotates to brush and clean the inside of the filter screen.

[0040] Backwashing state: the flushing knob 1 is in the flushing position, the drain valve 7 is open, and the water outlet 3-3 is closed. The liquid enters from the water inlet 3-2 of the upper cylinder 3, passes through the valve core 2 industrial flushing channel 2-1, passes through the interior of the upper cylinder, enters the filter element body 4-2 from the filter element filter screen 4-3, passes through the lower impeller 4-5, and finally flows out from the drain valve 7. Under the flushing of the liquid, the impurities on the filter screen 4-3 are flushed and discharged from the drain outlet 7.

[0041] See attached Figure 1-8 , split-flow filter device with backwashing and self-cleaning functions, is particularly suitable for general liquid filtration devices, such as pre-filters, ultrafiltration water purifiers, etc.

[0042] The split-flow filter device with backwashing and self-cleaning functions is used for pre-filters, ultrafiltration water purifiers, etc. When in use: the flushing knob 1 is in the working position, the drain valve 7 is closed, and the water outlet 3-3 is opened. Tap water enters from the cold water angle valve 12 through the pipeline, from the water inlet 3-2 of the upper cylinder 3, through the working channel 2-2 of the valve core 2, from the impeller 4-1 on the filter element assembly 4 into the filter element body 4-2, through the filter screen 4-3, and finally flows out from the water outlet 3-3 of the upper cylinder 3, through the pipeline, and flows out through the drinking water valve 13 for drinking water.

[0043] In the self-cleaning state: the flushing knob 1 is in the working position, the drain valve 7 is open, and the water outlet 3-3 is closed. The tap water enters from the water inlet 3-2 of the upper cylinder 3, passes through the working channel 2-2 of the valve core 2, enters the filter element body 4-2 from the upper impeller 4-1 of the filter element assembly 4, and then passes through the lower impeller 4-5, and finally flows out from the drain valve 7, through the pipeline, and flows out through the vegetable washing basin faucet 10 to the sink 9, which can be used for washing vegetables. Driven by the tap water, the upper impeller 4-1 and the lower impeller 4-5 rotate, driving the central shaft 4-6 to rotate, and the scraper 4-4 rotates to brush and clean the inside of the filter screen.

[0044] Backwashing state: the flushing knob 1 is in the flushing position, the drain valve 7 is open, and the water outlet 3-3 is closed. Tap water enters from the water inlet 3-2 of the upper cylinder 3, passes through the valve core 2 industrial flushing channel 2-1, passes through the interior of the upper cylinder, enters the filter element body 4-2 from the filter element filter screen 4-3, passes through the lower impeller 4-5, and finally flows out from the drain valve 7. Under the flushing of tap water, the impurities on the filter screen 4-3 are flushed and discharged from the drain outlet 7.

[0045] The hot water passes through the hot water angle valve 12 through the pipeline, flows out through the vegetable washing basin faucet 10, and flows into the sink 9 for washing dishes.

Claims

1. A split-flow filter device with backwashing and self-cleaning functions, characterized in that: It comprises a flushing knob (1), a valve core (2), an upper cylinder (3), a filter element assembly (4), a lower cylinder (5), a sealing element (6) and a drain valve (7); The upper center of the upper cylinder (3) is provided with a valve core mounting hole (3-1), the valve core (2) is mounted in the valve core mounting hole (3-1), the flushing knob (1) is mounted on the upper end of the valve core (2), and the upper two sides of the upper cylinder (3) are respectively provided with a water inlet (3-2) and a water outlet (3-3); The upper cylinder (3) is provided with a threaded sleeve (3-4) at the lower part, the threaded sleeve (3-4) is provided with an internal thread, the upper end of the lower cylinder (5) is provided with a threaded connection end (5-1), the lower end of the lower cylinder (5) is provided with a sewage outlet (5-2), and the sewage outlet (5-2) is equipped with a sewage valve (7) for sewage discharge during backwashing; the threaded connection end (5-1) provided at the upper end of the lower cylinder (5) and the threaded sleeve (3-4) provided at the lower part of the upper cylinder (3) are sealed and connected through a sealing member (6) to form a sealed cylinder; The filter element assembly (4) is installed in a sealed cylinder formed by the upper cylinder (3) and the lower cylinder (3); The filter element assembly (4) is composed of an upper impeller (4-1), a filter element body (4-2), a filter screen (4-3), a scraper (4-4), a lower impeller (4-5), a center shaft (4-6), an upper center shaft mounting plate (4-7), a lower center shaft mounting plate (4-8), an upper impeller mounting sleeve (4-9), and a lower impeller mounting sleeve (4-10); The upper central axis mounting plate (4-7) and the lower central axis mounting plate (4-8) are both provided with a central axis mounting hole and a water through hole; An upper impeller mounting seat (4-2-1) is arranged at the upper part of the filter element body (4-2), and a lower impeller mounting seat (4-2-2) is arranged at the lower part of the filter element body (4-2); The filter screen (4-3) is installed in the filter element body (4-2), a plurality of scrapers (4-4) are fixedly installed on the central shaft (4-6), the central shaft (4-6) together with the plurality of scrapers (4-4) are installed in the middle of the filter screen (4-3) in the filter element body (4-2), the upper central shaft mounting plate (4-7) is installed in the upper impeller mounting seat (4-2-1) at the upper part of the filter element body (4-2), the upper end of the central shaft (4-6) is installed in the central shaft mounting hole of the upper central shaft mounting plate (4-7), the lower central shaft mounting plate (4-8) is installed in the lower impeller mounting seat (4-2-2) at the lower part of the filter element body (4-2), and the lower end of the central shaft (4-6) is installed in the central shaft mounting hole of the lower central shaft mounting plate (4-8); The upper impeller (4-1) is fixedly mounted on the upper end of the central shaft (4-6), and the upper impeller mounting sleeve (4-9) is sleeved on the outer ring of the upper impeller (4-1) and mounted on the upper impeller mounting seat (4-2-1) on the upper part of the filter element body (4-2); The lower impeller (4-6) is fixedly mounted on the lower end of the central shaft (4-6), and the lower impeller mounting sleeve (4-10) is sleeved on the outer ring of the lower impeller (4-6) and mounted on the lower impeller mounting seat (4-2-2) at the lower part of the filter element body (4-2).

2. The split-flow filter device with backwashing and self-cleaning functions according to claim 1, characterized in that: The filter element body (4-2) is configured in a cylindrical frame shape, and a plurality of water passages are provided on the filter element body (4-2).

3. The split-flow filter device with backwashing and self-cleaning functions according to claim 1, characterized in that: The sealing element (6) is an elastic sealing ring.

4. The split-flow filter device with backwashing and self-cleaning functions according to claim 1, characterized in that: The filter screen (4-3) is made of 20-100 mesh 304 stainless steel filter screen.

5. The split-flow filter device with backwashing and self-cleaning functions according to claim 1, characterized in that: The scraper 4-4 is provided with a rubber scraper or a brush.

6. The split-flow filter device with backwashing and self-cleaning functions according to claim 1, characterized in that: The upper impeller (4-1) and the lower impeller (4-5) are provided with a plurality of impeller blades.

7. The split-flow filter device with backwashing and self-cleaning functions according to claim 1, characterized in that: The valve core (2) is provided with a flushing channel (2-1) and a working channel (2-2).

8. The working method of the split-flow filter device with backwashing and self-cleaning functions according to claim 1, characterized in that: When the split-flow filter device with backwashing and self-cleaning functions is in operation: the flushing knob (1) is in the working position, the drain valve (7) is closed, the water outlet (3-3) is opened, and the liquid enters from the water inlet (3-2) of the upper cylinder (3), passes through the working channel (2-2) of the valve core (2), enters the filter element body (4-2) from the upper impeller (4-1) of the filter element assembly (4), passes through the filter screen (4-3), and finally flows out from the water outlet (3-3) of the upper cylinder (3); In the self-cleaning state: the flushing knob (1) is in the working position, the drain valve (7) is open, the water outlet (3-3) is closed, and the liquid enters from the water inlet (3-2) of the upper cylinder (3), passes through the working channel (2-2) of the valve core (2), enters the filter element body (4-2) from the upper impeller (4-1) of the filter element assembly (4), and then passes through the lower impeller (4-5), and finally flows out from the drain valve (7). Driven by the liquid, the upper impeller (4-1) and the lower impeller (4-5) rotate, driving the central shaft (4-6) to rotate, and the scraper (4-4) rotates to brush and clean the inside of the filter screen; Backwashing state: the flushing knob (1) is in the flushing position, the drain valve (7) is open, and the water outlet (3-3) is closed. Liquid enters from the water inlet (3-2) of the upper cylinder (3), passes through the valve core (2) industrial flushing channel (2-1), passes through the interior of the upper cylinder, enters the filter element body (4-2) from the filter element filter screen (4-3), passes through the lower impeller (4-5), and finally flows out from the drain valve (7). Under the flushing of the liquid, impurities on the filter screen (4-3) are flushed and discharged from the drain outlet (7).

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