Backwash pre-filter

Abstract

The utility model discloses a backwashing pre-filter which comprises a machine head for water to flow in and out, a filter bottle connected with the machine head, a pollution discharge assembly connected with the filter bottle, a filter assembly arranged in the filter bottle, a rotary scraping and washing framework arranged on the outer side of the filter assembly, and a flow direction switching assembly arranged in the filter bottle, the flow direction switching assembly comprises a switching supporting framework arranged in the filtering assembly and a switching piece arranged on the switching supporting framework, a first through hole is formed in the switching piece, a second through hole is formed in the switching supporting framework, the sewage discharging assembly comprises a sewage discharging shaft connected with the switching supporting framework, a sewage discharging opening is formed in the filtering bottle, and the sewage discharging opening is communicated with the switching supporting framework. The pollution discharge shaft can movably open or close the pollution discharge port and drive the switching support framework to movably close the first through hole and open the second through hole or open the first through hole and close the second through hole. The flow channel switching assembly is driven by the sewage discharging shaft to achieve efficient switching between the filtering state and the sewage discharging state, stability is good, influences of water pressure are avoided, and the water pressure is high and the flushing force is large during flushing.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a backwashing pre-filter. Background Art

[0002] At present, the filter cleaning methods of the pre-filter on the market mainly include backwashing type and scraping type. The backwashing type pre-filter uses a spring to switch. The spring switching is affected by water pressure. During the switching process, the water pressure is small and cannot overcome the spring force, and the switch between sewage discharge and filtration cannot be achieved. For the scraping type pre-filter, when rotating and scraping, impurities with particles smaller than the filter mesh aperture are squeezed to a certain extent, causing fine particle impurities and colloidal suspended matter to embed deeper and tighter in the filter mesh, and cleaning and maintenance are also very difficult. Therefore, the market needs a pre-filter that can clean the filter mesh and achieve efficient switching between filtering state and sewage discharge state without being affected by water pressure. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and provide a backwash pre-filter. The utility model drives the flow channel switching component through the sewage discharge shaft to realize efficient switching between the filtering state and the sewage discharge state. It has good stability and is not affected by water pressure. In the sewage discharge state, all water enters the interior of the filter screen, so that the water pressure is higher during flushing, the flushing force is greater, and the filter screen is better cleaned.

[0004] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a backwash pre-filter, including a machine head for water inlet and outlet, a filter bottle connected to the machine head, a sewage discharge component connected to the filter bottle, a filter component arranged in the filter bottle, a rotating scraping frame is provided on the outside of the filter component, a flow direction switching component is provided in the filter bottle, the flow direction switching component includes a switching support frame provided in the filter component and a switching member provided on the switching support frame, a first through hole is provided on the switching member, a second through hole is provided on the switching support frame, the sewage discharge component includes a sewage discharge shaft connected to the switching support frame, a sewage discharge port is provided in the filter bottle, the sewage discharge shaft can movably open or close the sewage discharge port and drive the switching support frame to movably close the first through hole and open the second through hole or open the first through hole and close the second through hole. When the sewage discharge shaft closes the sewage discharge port, the switching support frame opens the first through hole, and the second through hole is closed. At this time, the water flows from the machine head through the first through hole and hits the rotating scraping frame to enter the cavity of the filter bottle and the filter component. The water flows into the filter component and flows out after being filtered; the sewage discharge shaft moves upward to open the sewage discharge port, and the sewage discharge shaft moves upward to drive the switching support frame to move upward. The switching support frame moves upward to close the first through hole, and the second through hole moves upward and then opens. The water flows through the second through hole into the filter component, flows out to the cavity of the filter component and the filter bottle, and the sewage flows out through the opened sewage discharge port. When the water flow hits the rotating scraping frame in the filtering state, the rotating scraping frame rotates, and the water body and the rotating scraping frame rotate together to wash the surface of the filter screen. The particulate impurities and colloidal suspended matter rotate with the rotating water flow and finally deposit at the bottom of the bottle. After the sewage discharge shaft moves upward to open the sewage discharge port, the particulate impurities and colloidal suspended matter deposited at the bottom of the bottle are discharged together.

[0005] Preferably, the switching support skeleton includes a first skeleton seat and a first skeleton tube arranged below the skeleton seat. The first skeleton seat and the first skeleton tube are integrally formed. A first groove is arranged between the first skeleton seat and the first skeleton tube. A third through hole is arranged on the first groove. The second through hole is arranged on the first skeleton tube. An insertion hole for inserting a sewage discharge shaft is arranged at the bottom of the first skeleton tube. The first skeleton seat opens or closes the first through hole as the sewage discharge shaft moves.

[0006] Preferably, the switching member includes a switching seat and a switching tube arranged in the switching seat, a second groove is arranged between the switching seat and the switching tube, a fourth through hole is arranged on the second groove, the first groove is inserted into the second groove to connect the third through hole with the fourth through hole, and the first through hole is arranged on the switching seat.

[0007] Preferably, the filter assembly includes a filter screen arranged in a rotating scraping frame and a filter frame arranged in the filter screen, a second frame seat is provided on the filter frame, and a first frame tube is inserted into the filter frame to movably close or open the second through hole by the filter frame.

[0008] Preferably, a filter guide ring is provided on the outer side of the switching support frame, and the filter guide ring is provided with inclined guide holes evenly distributed along the circumference. By designing the inclined guide holes, water can form rotating water splashes after passing through the inclined guide holes.

[0009] Preferably, the rotary scraping and washing skeleton comprises a second skeleton tube and an impeller arranged on the second skeleton tube, the impellers are distributed along the circumference of the second skeleton tube, a scraping and washing skeleton ring is arranged inside the impeller, and the impeller is arranged below the filter element guide ring. The water flows through the inclined guide hole to form a rotating water splash and then hits the impeller, so that the rotation of the impeller drives the rotary scraping and washing skeleton to rotate and wash the surface of the filter screen, and the particulate impurities and colloidal suspended matter on the surface of the filter screen rotate together with the water flow. Through the arrangement of the scraping and washing skeleton ring, a number of impellers distributed along the circumference of the second skeleton tube are fixed, thereby increasing the force strength of the impeller and extending the service life of the product.

[0010] Preferably, the sewage discharge assembly further includes a sewage discharge shaft seat and a sewage discharge knob, the sewage discharge shaft is installed in the sewage discharge shaft seat, the sewage discharge shaft is threadedly connected to the sewage discharge shaft seat, and the sewage discharge knob is arranged on the outside of the sewage discharge shaft seat.

[0011] Preferably, the inner side of the drain knob is provided with a third groove distributed along the circumference of the inner wall of the drain knob, and the drain shaft seat is provided with a protrusion distributed along the circumference of the outer wall of the drain shaft seat, and the protrusion is clamped in the third groove. The drain knob and the drain shaft seat are clamped, and the drain shaft seat is rotated by rotating the drain knob, and the rotation of the drain shaft seat drives the drain shaft threadedly connected to the drain shaft seat to move up and down.

[0012] Preferably, the sewage discharge shaft is provided with a fifth through hole, and the fifth through hole can be moved with the sewage discharge shaft to open or close the sewage discharge port; the sewage discharge shaft is provided with a baffle, and the baffle is arranged below the fifth through hole. When the fifth through hole is in the sewage discharge port, the sewage discharge shaft blocks the sewage discharge port and closes it. When the fifth through hole moves up to above the sewage discharge port, sewage flows out of the sewage discharge port after entering the sewage discharge port from the fifth through hole. The design of the baffle prevents the sewage discharge shaft from moving up excessively and moving out of the sewage discharge shaft seat.

[0013] Preferably, the machine head includes a copper head, in which a water inlet pipe, a water outlet pipe and a pipe sleeve are arranged, in which an inner pipe is arranged, the inner pipe is connected with the water outlet pipe, and the inner pipe is arranged above the switching pipe and connected with the switching pipe.

[0014] The use process of the utility model is as follows:

[0015] In the filtering state, water flows in from the water inlet pipe, flows out from the first through hole after passing through the fourth through hole and the third through hole, flows downward through the filter element guide ring and reaches between the filter bottle and the filter element assembly cavity, flows in from the second frame tube of the rotating scraping and washing skeleton and passes through the filter screen, flows upward through the first frame tube and the switching tube and flows out from the inner tube to the water outlet pipe; when the water flows through the filter element guide ring, it forms a rotating water splash, which pushes the impeller above the rotating scraping and washing skeleton, and the impeller drives the rotating scraping and washing skeleton to rotate and flush the surface of the filter screen, and the granular impurities and colloidal suspended matter rotate with the water flow, and finally settle at the bottom of the bottle due to gravity;

[0016] In the sewage discharge state, the sewage discharge knob is rotated, and the sewage discharge knob drives the sewage discharge shaft seat to rotate, so that the sewage discharge shaft rises along the thread, and the rising sewage discharge shaft drives the switching support frame to rise, and the rising switching support frame makes the first frame seat block the first through hole. At this time, due to the rising of the switching support frame, the second through hole on the switching support frame that was originally closed by the second frame seat on the filter frame rises, and the second through hole rises beyond the second frame seat. At this time, the second through hole is opened, forming a backwash sewage discharge structure;

[0017] Water flows in from the water inlet pipe, flows out from the second through hole after passing through the fourth through hole and the third through hole, enters the filter frame, passes through the filter screen from the inside to the outside, flushes the filter screen, and is discharged from the sewage outlet of the filter bottle.

[0018] The utility model has the following beneficial effects:

[0019] 1. The utility model drives the flow channel switching component through the sewage discharge shaft to achieve efficient switching between the filtering state and the sewage discharge state, has good stability, is not affected by water pressure, and in the sewage discharge state, all water enters the interior of the filter screen, so that the water pressure is high during flushing, the flushing force is strong, and the filter screen is better cleaned;

[0020] 2. The utility model adopts a filter guide ring to form a spiral rotating water column to flush the rust and mud on the surface of the filter. Under the action of gravity, these impurities fall from top to bottom along the water rotation to the bottom of the bottle and are deposited, and are thoroughly cleaned when sewage is discharged; at the same time, the colloidal suspended matter is stirred and falls from top to bottom along the spiral water column to the bottom of the bottle and is thoroughly cleaned when sewage is discharged, reducing its contact with the filter and avoiding adsorption on the surface of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the filtering state.

[0022] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0023] Figure 3 It is a structural diagram of the sewage discharge state.

[0024] Figure 4 yes Figure 3 Cross-sectional view along direction BB.

[0025] Figure 5 It is a structural schematic diagram of the flow direction switching component.

[0026] Figure 6 It is a structural diagram of the switching support skeleton.

[0027] Figure 7 It is a structural diagram of the switching component.

[0028] Figure 8 It is a structural diagram of the filtering skeleton.

[0029] Fig. 9 It is a structural schematic diagram of the filter element guide ring.

[0030] Fig.10 It is a structural schematic diagram of a rotary scraping and washing skeleton.

[0031] Fig.11 It is a structural diagram of the sewage discharge shaft.

[0032] Fig.12 It is a structural diagram of the sewage discharge shaft seat.

[0033] Fig.13 It is a structural diagram of the sewage discharge knob.

[0034] In the figure: 1, machine head, 11, copper head, 12, water inlet pipe, 13, water outlet pipe, 14, pipe sleeve, 15, inner pipe, 2, filter bottle, 21, sewage outlet, 3, sewage discharge assembly, 31, sewage discharge shaft, 311, fifth through hole, 312, baffle, 32, sewage discharge shaft seat, 321, raised part, 33, sewage discharge knob, 331, third groove, 34, sewage discharge mounting part, 4, filter assembly, 41, filter frame, 411, second frame seat, 5, rotary scraping frame, 51, second Skeleton tube, 52, impeller, 53, scraping skeleton ring, 6, flow direction switching component, 61, switching support skeleton, 611, first skeleton seat, 612, first skeleton tube, 6121, second through hole, 6122, jack, 613, first groove, 6131, third through hole, 62, switching member, 621, switching seat, 6211, first through hole, 622, switching tube, 623, second groove, 6231, fourth through hole, 7, filter element guide ring, 71, inclined guide hole. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0036] like Figure 1-13As shown, the utility model is a backwash pre-filter, including a machine head 1 for water inlet and outlet, a filter bottle 2 connected to the machine head 1, a sewage discharge component 3 connected to the filter bottle 2, and a filter component 4 arranged in the filter bottle 2. A rotating scraping skeleton 5 is provided on the outer side of the filter component 4. A flow direction switching component 6 is provided in the filter bottle 2. The flow direction switching component 6 includes a switching support skeleton 61 arranged in the filter component 4 and a switching member 62 arranged on the switching support skeleton 61. The switching member 62 is provided with a first through hole 6211, and the switching support skeleton 61 is provided with a second through hole 6121. The sewage discharge component 3 includes a sewage discharge shaft 31 connected to the switching support skeleton 61. A sewage outlet 21 is provided in the filter bottle 2. The sewage discharge shaft 31 can movably open or close the sewage outlet 21 and drive the switching support skeleton 61 to movably close the first through hole 6211 and open the second through hole 6121 or open the first through hole 6211 and close the second through hole 6121.

[0037] The switching support skeleton 61 includes a first skeleton seat 611 and a first skeleton tube 612 arranged below the skeleton seat. The first skeleton seat 611 and the first skeleton tube 612 are integrally formed. A first groove 613 is provided between the first skeleton seat 611 and the first skeleton tube 612. A third through hole 6131 is provided on the first groove 613. A second through hole 6121 is provided on the first skeleton tube 612. An insertion hole 6122 for inserting the sewage discharge shaft 31 is provided at the bottom of the first skeleton tube 612. The first skeleton seat 611 opens or closes the first through hole 6211 as the sewage discharge shaft 31 moves.

[0038] The switching member 62 includes a switching seat 621 and a switching tube 622 arranged in the switching seat 621. A second groove 623 is provided between the switching seat 621 and the switching tube 622. A fourth through hole 6231 is provided on the second groove 623. The first groove 613 is inserted into the second groove 623 to connect the third through hole 6131 with the fourth through hole 6231. The first through hole 6211 is provided on the switching seat 621.

[0039] The filter assembly 4 includes a filter screen (not shown in the figure) arranged in the rotating scraping skeleton 5 and a filter skeleton 41 arranged in the filter screen. A second skeleton seat 411 is provided on the filter skeleton 41. The first skeleton tube 612 is inserted into the filter skeleton 41 and can movably close or open the second through hole 6121 by the filter skeleton 41.

[0040] A filter element guide ring 7 is disposed on the outside of the switching support frame 61 , and the filter element guide ring 7 is provided with inclined guide holes 71 evenly distributed along the circumference.

[0041] The rotary scraping and washing skeleton 5 comprises a second skeleton tube 51 and an impeller 52 arranged on the second skeleton tube 51 . The impeller 52 is distributed along the circumference of the second skeleton tube 51 . A scraping and washing skeleton ring 53 is arranged inside the impeller 52 . The impeller 52 is arranged below the filter element guide ring 7 .

[0042] The sewage discharge assembly 3 also includes a sewage discharge shaft seat 32 and a sewage discharge knob 33 . The sewage discharge shaft 31 is installed in the sewage discharge shaft seat 32 . The sewage discharge shaft 31 is threadedly connected to the sewage discharge shaft seat 32 . The sewage discharge knob 33 is arranged outside the sewage discharge shaft seat 32 .

[0043] The inner side of the drain knob 33 is provided with a third groove 331 distributed along the circumference of the inner wall of the drain knob 33 , and the drain shaft seat 32 is provided with a protrusion 321 distributed along the circumference of the outer wall of the drain shaft seat 32 , and the protrusion 321 is clamped in the third groove 331 .

[0044] A fifth through hole 311 is provided on the sewage discharge shaft 31 , and the fifth through hole 311 can move with the sewage discharge shaft 31 to open or close the sewage discharge port 21 ; a baffle 312 is provided on the sewage discharge shaft 31 , and the baffle 312 is arranged below the fifth through hole 311 .

[0045] The sewage discharge assembly 3 further includes a sewage discharge mounting member 34 disposed outside the sewage discharge knob 33 . The sewage discharge mounting member 34 is threadedly connected to the filter bottle 2 , and the sewage discharge knob 33 is snap-fitted to the sewage discharge mounting member 34 .

[0046] The machine head 1 includes a copper head 11, in which a water inlet pipe 12, a water outlet pipe 13 and a pipe sleeve 14 are arranged. An inner pipe 15 is arranged in the pipe sleeve 14, and the inner pipe 15 is connected with the water outlet pipe 13. The inner pipe 15 is arranged above the switching pipe 622 and is connected with the switching pipe 622.

[0047] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] It should be noted that when an element is referred to as being "fixed on" or "provided on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0049] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Claims

1. A backwash pre-filter, characterized in that: The invention comprises a machine head (1) for water inlet and outlet, a filter bottle (2) connected to the machine head (1), a sewage discharge assembly (3) connected to the filter bottle (2), and a filter assembly (4) arranged in the filter bottle (2); a rotating scraping frame (5) is arranged outside the filter assembly (4); a flow direction switching assembly (6) is arranged in the filter bottle (2); the flow direction switching assembly (6) comprises a switching support frame (61) arranged in the filter assembly (4) and a switching member (62) arranged on the switching support frame (61); the switching member (62) is provided with a first flow direction switch; A hole (6211) is formed on the switching support frame (61), a second through hole (6121) is provided on the switching support frame (61), the sewage discharge assembly (3) comprises a sewage discharge shaft (31) connected to the switching support frame (61), a sewage discharge port (21) is provided in the filter bottle (2), the sewage discharge shaft (31) can move to open or close the sewage discharge port (21) and drive the switching support frame (61) to move to close the first through hole (6211) and open the second through hole (6121) or to open the first through hole (6211) and close the second through hole (6121).

2. The backwash pre-filter according to claim 1, characterized in that: The switching support frame (61) comprises a first frame seat (611) and a first frame tube (612) arranged below the frame seat; the first frame seat (611) and the first frame tube (612) are integrally formed; a first groove (613) is arranged between the first frame seat (611) and the first frame tube (612); a third through hole (6131) is arranged on the first groove (613); a second through hole (6121) is arranged on the first frame tube (612); a socket (6122) for inserting a sewage discharge shaft (31) is arranged at the bottom of the first frame tube (612); the first frame seat (611) opens or closes the first through hole (6211) as the sewage discharge shaft (31) moves.

3. The backwash pre-filter according to claim 2, characterized in that: The switching member (62) comprises a switching seat (621) and a switching tube (622) arranged in the switching seat (621); a second groove (623) is arranged between the switching seat (621) and the switching tube (622); a fourth through hole (6231) is arranged on the second groove (623); the first groove (613) is inserted into the second groove (623) to connect the third through hole (6131) with the fourth through hole (6231); and the first through hole (6211) is arranged on the switching seat (621).

4. The backwash pre-filter according to claim 2 or 3, characterized in that: The filter assembly (4) comprises a filter screen arranged in a rotating scraping frame (5) and a filter frame (41) arranged in the filter screen, a second frame seat (411) is arranged on the filter frame (41), and a first frame tube (612) is inserted into the filter frame (41) to movably close or open the second through hole (6121) by the filter frame (41).

5. The backwash pre-filter according to claim 1, 2 or 3, characterized in that: A filter element guide ring (7) is arranged outside the switching support frame (61), and the filter element guide ring (7) is provided with inclined guide holes (71) evenly distributed along the circumference.

6. The backwash pre-filter according to claim 5, characterized in that: The rotary scraping and washing skeleton (5) comprises a second skeleton tube (51) and an impeller (52) arranged on the second skeleton tube (51); the impeller (52) is distributed along the circumference of the second skeleton tube (51); a scraping and washing skeleton ring (53) is arranged inside the impeller (52); and the impeller (52) is arranged below the filter element guide ring (7).

7. The backwash pre-filter according to claim 1, 2, 3 or 6, characterized in that: The sewage discharge assembly (3) also includes a sewage discharge shaft seat (32) and a sewage discharge knob (33). The sewage discharge shaft (31) is installed in the sewage discharge shaft seat (32). The sewage discharge shaft (31) is threadedly connected to the sewage discharge shaft seat (32). The sewage discharge knob (33) is arranged outside the sewage discharge shaft seat (32).

8. The backwash pre-filter according to claim 7, characterized in that: A third groove (331) is provided on the inner side of the sewage discharge knob (33) and is distributed along the circumference of the inner wall of the sewage discharge knob (33). A protrusion (321) is provided on the sewage discharge shaft seat (32) and is distributed along the circumference of the outer wall of the sewage discharge shaft seat (32). The protrusion (321) is clamped in the third groove (331).

9. The backwash pre-filter according to claim 1 or 8, characterized in that: A fifth through hole (311) is provided on the sewage discharge shaft (31), and the fifth through hole (311) can move with the sewage discharge shaft (31) to open or close the sewage discharge port (21); a baffle (312) is provided on the sewage discharge shaft (31), and the baffle (312) is arranged below the fifth through hole (311).

10. The backwash pre-filter according to claim 3, characterized in that: The machine head (1) comprises a copper head (11), a water inlet pipe (12), a water outlet pipe (13) and a pipe sleeve (14) are arranged in the copper head (11), an inner pipe (15) is arranged in the pipe sleeve (14), the inner pipe (15) is connected to the water outlet pipe (13), and the inner pipe (15) is arranged above the switching pipe (622) and is connected to the switching pipe (622).

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