CN113577861A

CN113577861A - Automatic back-flushing pre-filter

Info

Publication number: CN113577861A
Application number: CN202111019410.7A
Authority: CN
Inventors: 辜胜涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2021-11-02

Abstract

The invention discloses an automatic backwashing prefilter, relating to the technical field of filtering devices, and the technical scheme is as follows: the filter comprises a filter cup, a joint, a filter element and a control part, wherein the filter cup is connected with the joint, the joint is provided with a water inlet flow passage and a water outlet flow passage, a raw water cavity is arranged in the filter cup, the water inlet flow passage is communicated with the raw water cavity through a water inlet, the filter cup is provided with a drain outlet, the drain outlet is communicated with the raw water cavity, and the control part can open or close the drain outlet; be provided with the water purification chamber in the filter core, the play water runner is linked together with the water purification chamber, has the conversion hole on the filter core, and the slip is provided with the shielding piece on the filter core, and the shielding piece can cover the conversion hole, and rivers can strike the shielding piece for the shielding piece slides with the limbers shutoff, conversion hole intercommunication water inlet runner and water purification chamber, be provided with the piece that resets that can make the shielding piece reset on the filter core, this leading filter ability automatic switch filter state and back flush state.

Description

Automatic back-flushing pre-filter

Technical Field

The invention relates to the technical field of filtering devices, in particular to an automatic backwashing prefilter.

Background

At present, with the improvement of science and technology and the improvement of living standard, people have higher requirements on the quality of drinking water, a preposed filter is often installed on a pipeline in front of a faucet, and the drinking water can be filtered and purified after passing through the preposed filter and flowing out of the faucet. In the prior art, three pre-filters are respectively a forward washing pre-filter, a siphon pre-filter and a back washing pre-filter, wherein the forward washing pre-filter has large washing flow, and has good washing effect on large-particle dirt, but only washes the surface of a filter screen by water flow, and has poor washing effect on strong attachments adhered on the filter screen; the siphon type pre-filter has a good dirt discharge effect on strong attached dirt on the filter screen, but the dirt suction port must be close to the filter screen, otherwise, the negative pressure suction force is weak, large particles are easy to deposit in a filter bowl of the filter and cannot be discharged, and the cleaning effect is influenced. The backwashing pre-filter utilizes water flow to wash outwards from the inside of the filter screen, has good sewage discharge effect on strong attached dirt on the filter screen, but the prior backwashing pre-filter needs a user to manually switch a filtering state or a backwashing state, and is inconvenient to use.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an automatic backwashing prefilter which has the advantage of convenience in use.

The technical purpose of the invention is realized by the following technical scheme: the filter comprises a filter cup, a joint, a filter element and a control part, wherein the filter cup is connected with the joint, the joint is provided with a water inlet channel and a water outlet channel, a raw water cavity is arranged in the filter cup, the water inlet channel is communicated with the raw water cavity through a water through hole, the filter cup is provided with a sewage discharge outlet, the sewage discharge outlet is communicated with the raw water cavity, and the control part can open or close the sewage discharge outlet; be provided with the water purification chamber in the filter core, go out the rivers passageway with the water purification chamber is linked together, conversion hole has on the filter core, the slip is provided with the shielding piece on the filter core, the shielding piece can cover conversion hole, rivers can strike the shielding piece makes the shielding piece slides will the limbers shutoff, conversion hole intercommunication the rivers passageway with the water purification chamber, be provided with on the filter core and make the piece that resets that the shielding piece resets.

Through the technical scheme, under the condition of normal filtration, the conversion hole is covered by the shielding piece, water flows into the raw water cavity through the water inlet flow channel and the water through port and passes through the filter element to enter the water purification cavity, and impurities mixed in the water flows are intercepted in the raw water cavity by the filter element and then are discharged outwards through the water outlet flow channel; after the drain is opened by the control component, the shielding piece slides under the impact action of water flow and the gravity action of the shielding piece, and the water opening is blocked, the shielding piece cannot cover the conversion hole after sliding, the water flow can enter the water purification cavity through the water inlet flow channel and the conversion hole, and then the water flow in the water purification cavity flows out towards the raw water cavity after passing through the filter element, so that impurities attached to the outside of the filter element are flushed into the raw water cavity, all impurities on the raw water cavity and the filter element are discharged through the drain, the shielding piece is reset under the action of the resetting piece, the water opening cannot be blocked by the shielding piece, the water inlet flow channel is communicated with the raw water cavity through the water opening, the switching hole is covered by the shielding piece, the water flow cannot enter the water purification cavity through the conversion hole, and therefore the automatic switching between the filtering state and the backwashing state is achieved, and the use is convenient.

Preferably, the shielding piece comprises a shielding block and a shielding convex block, the outer side wall of the shielding block extends outwards to form the shielding convex block, the shielding block can cover the conversion hole, and the shielding convex block can block the water through hole.

Through above-mentioned technical scheme, the shielding piece slides under the impact of rivers, and the shielding piece can cover the conversion hole, shelters from the lug and can be with the water gap shutoff.

Preferably, the blocking piece is provided with a through hole, the filter element penetrates through the through hole, and the blocking piece is connected with the filter element in a sliding manner.

Through above-mentioned technical scheme, the through-hole is worn to locate by the filter core, and shelters from the piece and slide with the filter core and be connected, and under the impact of rivers, shelters from the piece and just can remove along the filter core.

Preferably, the piece that resets includes the spring, the spring housing is located the lateral wall of filter core, the flange that the lateral wall of filter core outwards extended the formation, the one end of spring with the lower terminal surface of shielding piece offsets, the other end of spring with the up end facial features of flange offsets.

Through above-mentioned technical scheme, under the impact of rivers and the action of gravity of self, the shielding piece slides, and extrudees the spring, and the impact that disappears or rivers when rivers weakens, and the produced power of spring elastic deformation just can promote the shielding piece and slide, makes the shielding piece reset.

Preferably, the piece that resets includes magnet one and magnet two, magnet one install in the filter core, magnet two install in the shielding piece, magnet one with magnet two magnetism repulses mutually, magnet one with magnet two cooperation can make the shielding piece cover the conversion hole.

Through above-mentioned technical scheme, magnet one repels with magnet two magnetism, and the produced repulsion effort between magnet one and the magnet two can promote the shielding piece and slide, makes the shielding piece reset and will change the hole again and cover.

Preferably, the piece that resets includes magnet three and magnet four, magnet three install in the shielding piece, magnet four install in the joint, magnet three with four magnetism of magnet attract mutually, magnet three with four cooperations of magnet can make the shielding piece covers the conversion hole.

Through above-mentioned technical scheme, magnet three and four magnetism attracting mutually of magnet, produced looks attraction effort between magnet one and the magnet two can pull the shielding piece and slide, makes the shielding piece reset and will change the hole again and cover.

Preferably, the piece that resets includes magnet five, magnet six and magnet seven, magnet five install in the filter core, magnet six install in the shielding piece, magnet seven install in the joint, magnet five with magnet six magnetism repels each other, magnet six with magnet seven magnetism attracts each other, magnet five, magnet six and the cooperation of magnet seven can make the shielding piece cover the conversion hole.

Through above-mentioned technical scheme, five magnets repel each other with six magnetism of magnet, six magnets with seven magnetism attract each other of magnet, and the produced repulsion effort between five magnets and six magnet can push the shielding piece and slide, and the produced attraction effort between six magnets and seven magnet can pull the shielding piece and slide, makes the shielding piece reset and will change the hole and cover again.

Preferably, be provided with the location box in the former water cavity, it is provided with the impeller to rotate in the location box, be provided with the rotating turret in the former water cavity, the water conservancy diversion hole has been seted up on the location box, rivers can pass through the water conservancy diversion hole is strikeed the impeller, the rotating turret with the impeller is connected, the rotating turret is located the outside of filter core, be provided with on the rotating turret and wash the filter core and/or the washing piece in former water cavity.

Through the technical scheme, rivers in the former water cavity are impacted the impeller in getting into the location box through the water conservancy diversion hole for the impeller drives the rotating turret rotatory, and the washing piece on the rotating turret then washs filter core or former water cavity along with the rotation of rotating turret, and the rotatory rotating turret drives the rivers rotation of former water cavity, and then impurity discharge from the drain with higher speed, and rotatory rivers also can further wash the filter core under the effect of centrifugal force.

Preferably, be provided with the connecting bolt in the drain, seted up on the connecting bolt and can with the external blowoff hole of former water cavity intercommunication, the blowoff hole can with former water cavity is linked together, the lower terminal surface of impeller is seted up flutedly, be connected with the center post on the connecting bolt, the upper end of center post is provided with the tip, the tip contradict in the bottom surface of recess.

Through above-mentioned technical scheme, the center post inserts in the recess, fixes a position the impeller, makes the impeller rotate more steadily, and contradicts in the bottom surface of recess through the tip, effectively reduces the friction that produces between impeller and the center post, and impurity on former water cavity and the filter core passes through the blowoff hole and discharges.

Preferably, the control component comprises a drain valve, the drain valve is connected with the connecting bolt, and the drain valve can control the drain hole to open or close.

Through the technical scheme, a user can control the opening or closing of the sewage draining outlet through the sewage draining valve, so that the raw water cavity and the outside can be switched on or off, and the operation is simple and the use is convenient.

Preferably, the outer side wall of the filter element is connected with a limiting ring, and the lower end face of the limiting ring can abut against the upper end face of the shielding piece.

Through above-mentioned technical scheme, the lower terminal surface of spacing ring and the up end counterbalance of shielding piece lean on to this limits the position of shielding piece, prevents that the shielding piece from falling off from the filter core by the influence of spring effort.

Preferably, an intercepting net capable of covering the conversion hole is arranged in the joint.

Through above-mentioned technical scheme, the interception net can avoid the impurity in the rivers to get into the water purification chamber through the conversion hole to guarantee the cleanness in the water purification chamber.

Preferably, the filter bowl is provided with a protective shell outside the filter bowl, and the protective shell can surround the filter bowl.

Through above-mentioned technical scheme, the filter bowl parcel is wrapped up to the protecting crust, and when the filter bowl received water hammer or freezing influence and damaged, brokenly, the water that spills from the impaired department of filter bowl was intercepted by the protecting crust, prevents that the filter bowl is impaired and influence the normal life of resident family.

Preferably, the water passage opening is formed in the filter bowl.

Through the technical scheme, the water through opening is formed in the filter cup, and the shielding piece and the filter cup can separate a passage between the raw water cavity and the water inlet flow passage.

Preferably, a partition plate is arranged between the filter bowl and the joint, and the water through port is formed in the partition plate.

Through the technical scheme, the limbers are arranged on the partition plate, and the blocking piece and the partition plate can block off a passage between the raw water cavity and the water inlet flow passage.

Preferably, a spacer is arranged in the joint, and the spacer can separate water from the joint.

Through above-mentioned technical scheme, set up the separator in connecting, under the effect of separator, can avoid water direct with connect the contact, prevent to connect and soak in aqueous for a long time, heavy metal is continuously appeared to aqueous, leads to the heavy metal of aquatic to exceed standard, endangers user's healthy.

Preferably, the separator includes insulating tube one, insulating tube two and separation sleeve, insulating tube one set up in the water inlet runner, insulating tube one can with the limbers intercommunication, insulating tube two set up in the water outlet runner, the separation sleeve is established in the joint, the separation sleeve can with the water purification chamber with insulating tube two intercommunications.

Through above-mentioned technical scheme, water is in after the spacer tube is first, and the department enters into to the former water cavity from the delivery port, and passes the filter core and enter into to the water purification intracavity, and the rivers in the water purification intracavity flow into in the spacer sleeve, outwards flow after the spacer tube is two again.

In summary, compared with the prior art, the beneficial effects of the invention are as follows:

1. under the impact of rivers and the effect of piece that resets, the shielding piece can move along the filter core, realizes automatic switch filtering state and back flush state, need not user's manual switching filtering state or back flush state, and convenience of customers uses.

Drawings

FIG. 1 is a sectional view of the first embodiment;

FIG. 2 is a schematic structural diagram according to a first embodiment;

FIG. 3 is a schematic partial structural view according to the first embodiment;

FIG. 4 is a cross-sectional view of a filter cartridge and shield according to an embodiment;

FIG. 5 is an enlarged view of part A of the first embodiment;

FIG. 6 is a schematic view of a shield according to an embodiment;

FIG. 7 is a cross-sectional view of an impeller and a connecting bolt according to an embodiment;

FIG. 8 is a cross-sectional view of an embodiment drain valve;

FIG. 9 is a schematic view of a positioning box according to an embodiment;

FIG. 10 is a schematic structural diagram of a rotating frame according to an embodiment;

FIG. 11 is a partial sectional view of the second embodiment;

FIG. 12 is a partial sectional view of a third embodiment;

FIG. 13 is a partial sectional view of the fourth embodiment;

FIG. 14 is a partial sectional view of the fifth embodiment;

FIG. 15 is a partial sectional view of the sixth embodiment;

FIG. 16 is another partial sectional view of the sixth embodiment.

Reference numerals: 1. a filter bowl; 2. a joint; 3. a filter element; 4. a control component; 41. a blowoff valve; 5. a water inlet flow channel; 6. a water outlet flow channel; 7. a raw water cavity; 8. a partition plate; 9. a water inlet; 10. a sewage draining outlet; 11. a water purifying cavity; 12. a transfer aperture; 13. a shield; 131. a stop block is shielded; 132. shielding the projection; 14. a reset member; 141. a spring; 142. a magnet I; 143. a second magnet; 144. a magnet III; 145. a fourth magnet; 146. a fifth magnet; 147. a magnet six; 148. a magnet seven; 15. a through hole; 16. a flange; 17. a positioning box; 18. an impeller; 19. a rotating frame; 20. a flow guide hole; 21. a limiting ring; 22. a groove; 23. a central column; 24. a tip; 25. a connecting bolt; 26. a sewage draining hole; 27. a reinforcement cap; 28. an intercepting net; 29. a protective shell; 30. cleaning the workpiece; 301. a first brush; 302. a second brush; 31. a spacer; 311. a first isolation pipe; 312. a second isolation pipe; 313. and (4) an isolation sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

an automatic back-flushing pre-filter is disclosed, as shown in fig. 1 to 10, and comprises a filter bowl 1, a connector 2, a filter element 3 and a control component 4, wherein the connector 2 is provided with a water inlet flow passage 5 and a water outlet flow passage 6, the filter bowl 1 is in threaded connection with the connector 2, a raw water cavity 7 is arranged in the filter bowl 1, the water inlet flow passage 5 is communicated with the raw water cavity 7 through a water inlet 9, the water inlet 9 is arranged at the upper end of the filter bowl 1, a purified water cavity 11 is arranged in the filter element 3, and the water outlet flow passage 6 is communicated with the purified water cavity 11.

Have drain 10 on the filter bowl 1, drain 10 and former water cavity 7 intercommunication, control unit 4 can open or close drain 10, be provided with connecting bolt 25 in the drain 10, set up on the connecting bolt 25 and can communicate external blowoff hole 26 with former water cavity 7, blowoff hole 26 can be linked together with former water cavity 7, blowoff hole 26 is linked together with the external world, control unit 4 includes blowoff valve 41, blowoff valve 41 is connected with connecting bolt 25, blowoff valve 41 can control blowoff hole 26 and open or close, blowoff valve 41 can adopt the ball valve among the prior art, control blowoff hole 26 and open as blowoff valve 41, impurity on former water cavity 7 and the filter core 3 passes through blowoff hole 26 and discharges, control blowoff hole 26 and close as blowoff valve 41, impurity on former water cavity 7 and the filter core 3 then can't outwards discharge through blowoff hole 26.

The filter element 3 is provided with a plurality of conversion holes 12, preferably, the conversion holes 12 are uniformly arranged along the circumferential direction of the filter element 3, the filter element 3 is provided with a shielding piece 13 in a sliding way, the shielding piece 13 can cover the conversion holes 12, water flow can impact the shielding piece 13, so that the water passage opening 9 is blocked by the sliding of the shielding piece 13, the switching hole 12 is communicated with the water inlet flow passage 5 and the purified water cavity 11, the filter element 3 is provided with a resetting piece 14 which can reset the shielding piece 13, it should be noted that the shielding piece 13 is impacted by water flow and also receives the gravity action of the shielding piece 13, under the control of the blowoff valve 41, the blowoff hole 26 is opened, the blowoff hole 26 is communicated with the raw water chamber 7, the water flow can have enough impact force to make the blocking piece 13 block the water through opening 9 after sliding, and the baffle piece 13 can not cover the conversion hole 12 any more, and the conversion hole 12 is communicated with the water inlet flow passage 5 and the purified water cavity 11.

Preferably, the shielding member 13 includes a shielding block 131 and a shielding protrusion 132, an outer side wall of the shielding block 131 extends outward to form the shielding protrusion 132, the shielding block 131 and the shielding protrusion 132 are integrally formed, and the shielding protrusion 132 is located at an upper end of the shielding block 131.

The blocking protrusion 132 can block the water inlet 9, the blocking protrusion 132 is adapted to the water inlet 9, and preferably, a sealing ring is disposed on an outer side wall of the blocking protrusion 132, alternatively, a sealing ring may be disposed on an inner wall of the water inlet 9, and the sealing ring is disposed between the blocking protrusion 132 and the water inlet 9, so that the sealing performance of the blocking protrusion 132 to the water inlet 9 can be ensured.

Hide dog 131 and can cover conversion hole 12, shelter from the through-hole 15 that has on the piece 131, through-hole 15 is worn to locate by filter core 3, and shelter from piece 131 and filter core 3 and slide and be connected, preferentially, the lateral wall of filter core 3 is provided with two at least sealing washers, as other schemes, also can set up two at least sealing washers on the pore wall of through-hole 15, set up two at least sealing washers between filter core 3 and the piece 131 of sheltering from and can guarantee to hide the leakproofness of dog 131 to through-hole 15.

The reset piece 14 includes a spring 141, the outer side wall of the filter element 3 is sleeved with the spring 141, the outer side wall of the filter element 3 extends outwards to form a flange 16, one end of the spring 141 is abutted to the lower end face of the shielding protrusion 132, and the other end of the spring 141 is abutted to the upper end face of the flange 16.

The lateral wall of filter core can be dismantled and be connected with spacing ring 21, and spacing ring 21's lower terminal surface can support with the up end that shelters from lug 132 and lean on, and is preferred, and spacing ring 21 can adopt the jump ring.

The former water cavity 7 is provided with a positioning box 17, the positioning box 17 is provided with an impeller 18 in a rotating mode, the former water cavity 7 is provided with a rotating frame 19, the positioning box 17 is provided with a flow guide hole 20, preferably, the flow guide hole 20 is provided with a plurality of flow guide holes and distributed along the circumferential direction, water flow can impact the impeller 18 through the flow guide hole 20, and the flow guide holes 20 are inclined towards one side.

The rotating frame 19 is connected with the impeller 18, the rotating frame 19 is located on the outer side of the filter element 3, the rotating frame 19 is provided with a cleaning piece 30 capable of cleaning the filter element 3 and/or the raw water cavity 7, the cleaning piece 30 can be a first brush 301 and a second brush 302 arranged on the rotating frame 19, bristles of the first brush 301 can be in contact with the outer wall of the filter element 3, bristles of the second brush 302 can be in contact with the side wall of the raw water cavity 7, as other schemes, the first brush 301 can also be replaced by a first rubber scraper which can be attached to the outer wall of the filter element 3, the second brush 302 can be replaced by a second rubber scraper which can be attached to the cavity wall of the raw water cavity 7.

The lower terminal surface of impeller 18 is seted up flutedly 22, is connected with center post 23 on connecting the bolt 25, and center post 23 pegs graft in the upper end of connecting the bolt 25, and the upper end of center post 23 is provided with tip 24, and tip 24 conflicts in the bottom surface of recess 22, and is preferred, is provided with in the recess 22 and strengthens cap 27, strengthens cap 27 and can reduce the wearing and tearing of center post 23 and recess 22, and center post 23 pegs graft in strengthening cap 27, and tip 24 conflicts with strengthening cap 27.

Be provided with the interception net 28 that can cover conversion hole 12 in the joint 2, interception net 28 can set up in the lateral wall of filter core 3, certainly interception net 28 also can set up in the inside wall of filter core 3, interception net 28 can cover conversion hole 12 can, the protecting crust 29 in the filter bowl 1 outside, and protecting crust 29 can surround filter bowl 1, protecting crust 29 can with filter bowl 1 integrated into one piece, also can lug connection on connecting 2, as long as filter bowl 1 holds in protecting crust 29 can.

The working principle of the automatic backwashing pre-filter is as follows:

under the condition of normal filtration, the conversion hole 12 is covered by the shielding block 131, water flow cannot pass through the conversion hole 12, the water flow can only enter the raw water cavity 7 through the water inlet runner 5 and the water through hole 9 and pass through the filter element 3 to enter the purified water cavity 11, impurities in the water flow are retained in the raw water cavity 7 by the filter element 3, and the water flow in the purified water cavity 11 is discharged outwards through the water outlet runner 6; when the blowoff valve 41 controls the blowoff hole 10 to open, the shutter 13 slides along the filter element 3 under the impact of the water flow and the gravity thereof, and meanwhile, the spring 141 is extruded, the blocking lug 132 blocks the water through hole 9, the blocking block 131 can not cover the conversion hole 12, the water flow can enter the purified water cavity 11 through the water inlet flow channel 5 and the conversion hole 12, the water flow in the purified water cavity 11 passes through the filter element 3 and flows out towards the raw water cavity 7, so that the impurities attached outside the filter element 3 are flushed into the raw water cavity 7, the water flow in the raw water cavity 7 enters the positioning box 17 through the flow guide hole 20 to impact the impeller 18, the impeller 18 drives the rotating frame 19 to rotate, the cleaning piece 30 on the rotating frame 19 cleans the filter element 3 and the raw water cavity 7 along with the rotation of the rotating frame 19, and all impurities on the raw water cavity 7 and the filter element 3 are discharged outwards through the sewage outlet 10; after the blowoff valve 41 closes the drain outlet 10, the impact of the water flow disappears or the impact of the water flow is weakened, the force generated by the elastic deformation of the spring 141 can push the shielding piece 13 to slide along the filter element 3, so that the shielding piece 13 is reset, the conversion hole 12 is covered by the shielding block 131 again, the water flow cannot enter the purified water cavity 11 through the conversion hole 12, the shielding bump 132 cannot block the water through opening 9, and the water through opening 9 communicates the water inlet channel 5 with the raw water cavity 7.

Example two:

the difference between the second embodiment and the first embodiment is that, as shown in fig. 11, a partition plate 8 is provided between the bowl 1 and the joint 2, the water passage port 9 is opened in the partition plate 8, the shielding projection 132 is located at the middle of the shielding piece 131, and the shielding projection 132 can block the water passage port 9, and it should be noted that the shape of the shielding piece 13 is changed in accordance with the shape of the water passage port 9, and the change is considered to be in the same technical category.

Example three:

the third embodiment is different from the first embodiment in that, as shown in fig. 12, the restoring member 14 includes a first magnet 142 and a second magnet 143, the first magnet 142 is mounted on the filter element 3, and the second magnet 143 is mounted on the shielding member 13, preferably, the first magnet 142 and the second magnet 143 are both ring-shaped, the first magnet 142 is mounted on the upper end surface of the flange 16, the second magnet 143 is mounted on the lower end surface of the shielding protrusion 132, the first magnet 142 and the second magnet 143 magnetically repel each other, and repulsive force generated between the first magnet 142 and the second magnet 143 can push the shielding member 13 to slide toward the direction approaching the transfer hole 12, so that the shielding member 13 covers the transfer hole 12.

Example four:

the difference between the fourth embodiment and the first embodiment is that, as shown in fig. 13, the reset piece 14 includes a magnet three 144 and a magnet four 145, the magnet three 144 is mounted on the shield piece 13, the magnet four 145 is mounted on the connector 2, preferably, the magnet three 144 and the magnet four 145 are both in a ring shape, the magnet three 144 is mounted on the upper end surface of the shielding protrusion 132, the magnet four 145 is mounted on the inner wall of the connector 2, the magnet four 145 is located above the magnet three 144, the magnet three 144 and the magnet four 145 are magnetically attracted, and the attraction force generated between the magnet three 144 and the magnet four 145 can pull the shield piece 13 to slide towards the direction close to the transfer hole 12, so that the shield piece 13 covers the transfer hole 12.

Example five:

the difference between the fifth embodiment and the first embodiment is that, as shown in fig. 14, the reset piece 14 includes a five magnet 146, a six magnet 147 and a seven magnet 148, the five magnet 146 is mounted on the filter element 3, the six magnet 147 is mounted on the shield 13, the seven magnet 148 is mounted on the connector 2, preferably, the five magnet 146 is mounted on the upper end surface of the flange 16, the six magnet 147 is mounted on the lower end surface of the shield projection 132, the seven magnet 148 is mounted on the inner wall of the connector 2, the seven magnet 148 is above the six magnet 147, the six magnet 147 is above the five magnet 146, the five magnet 146 and the six magnet 147 are magnetically repulsive, the repulsive force generated between the five magnet 146 and the six magnet 147 can push the shield 13 to slide in the direction approaching the switch hole 12, the six magnet 147 and the seven magnet 148 are magnetically attractive, the attractive force generated between the six magnet 147 and the seven magnet 148 can pull the shield 13 to slide in the direction approaching the switch hole 12, so that the shutter 13 covers the transfer hole 12.

Example six:

the sixth embodiment is different from the first embodiment in that, as shown in fig. 15 to 16, a partition member 31 is provided in the joint 2, the partition member 31 can partition water from the joint 2, preferably, the partition member 31 is made of a non-metallic material, the partition member 31 includes a first partition pipe 311, a second partition pipe 312, and a partition sleeve 313, the first partition pipe 311 is provided in the water inlet flow passage 5, the first partition pipe 311 can communicate with the water passage port 9, the second partition pipe 312 is provided in the water outlet flow passage 6, the partition sleeve 313 is provided in the joint 2, the partition sleeve 313 can communicate the purified water chamber 11 with the second partition pipe 312, and the lower extreme of separation sleeve 313 is fixed in between joint 2 and filter bowl 1, it should be noted that, the isolation pipe 311, isolation pipe two 312 and separation sleeve 313 three also can integrated into one piece, as other schemes, isolator 31 also can adopt sets up isolation coating at the inner wall of joint 2, and isolation coating can be with water and joint 2 isolation.

The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.

Claims

1. The utility model provides an automatic leading filter of back flush, includes filter bowl (1), joint (2), filter core (3) and control unit (4), characterized by: the filter cup (1) is connected with the connector (2), a water inlet flow passage (5) and a water outlet flow passage (6) are arranged on the connector (2), a raw water cavity (7) is arranged in the filter cup (1), the water inlet flow passage (5) is communicated with the raw water cavity (7) through a water through opening (9), a sewage discharge outlet (10) is arranged on the filter cup (1), the sewage discharge outlet (10) is communicated with the raw water cavity (7), and the control component (4) can open or close the sewage discharge outlet (10); be provided with water purification chamber (11) in filter core (3), go out rivers way (6) with water purification chamber (11) are linked together, conversion hole (12) have on filter core (3), the slip is provided with shielding piece (13) on filter core (3), shielding piece (13) can cover conversion hole (12), rivers can strike shielding piece (13), make shielding piece (13) slide will limbers (9) shutoff, conversion hole (12) intercommunication intake runner (5) with water purification chamber (11), be provided with on filter core (3) and make shielding piece (13) reset piece (14) that resets.

2. The automatic backwashing prefilter of claim 1 wherein: the blocking piece (13) comprises a blocking piece (131) and a blocking convex block (132), the outer side wall of the blocking piece (131) extends outwards to form the blocking convex block (132), the blocking piece (131) can cover the conversion hole (12), and the blocking convex block (132) can block the water through hole (9).

3. The automatic backwashing prefilter of claim 2 wherein: the blocking piece (131) is provided with a through hole (15), the filter element (3) penetrates through the through hole (15), and the blocking piece (131) is connected with the filter element (3) in a sliding mode.

4. The automatic backwashing prefilter of claim 1 wherein: reset piece (14) including spring (141), spring (141) cover is located the lateral wall of filter core (3), the outside flange (16) that extend the formation of lateral wall of filter core (3), the one end of spring (141) with the lower terminal surface of shielding piece (13) offsets, the other end of spring (141) with the up end of flange (16) offsets.

5. The automatic backwashing prefilter of claim 1 wherein: the reset piece (14) comprises a first magnet (142) and a second magnet (143), the first magnet (142) is installed on the filter element (3), the second magnet (143) is installed on the shielding piece (13), the first magnet (142) and the second magnet (143) are magnetically repulsive, and the first magnet (142) and the second magnet (143) are matched to enable the shielding piece (13) to cover the conversion hole (12).

6. The automatic backwashing prefilter of claim 1 wherein: the reset piece (14) comprises a third magnet (144) and a fourth magnet (145), the third magnet (144) is installed on the shielding piece (13), the fourth magnet (145) is installed on the joint (2), the third magnet (144) and the fourth magnet (145) are attracted magnetically, and the third magnet (144) and the fourth magnet (145) are matched to enable the shielding piece (13) to cover the conversion hole (12).

7. The automatic backwashing prefilter of claim 1 wherein: the reset piece (14) comprises a five magnet (146), a six magnet (147) and a seven magnet (148), the five magnet (146) is installed on the filter element (3), the six magnet (147) is installed on the shielding piece (13), the seven magnet (148) is installed on the joint (2), the five magnet (146) and the six magnet (147) are magnetically repulsive, the six magnet (147) and the seven magnet (148) are magnetically attractive, and the five magnet (146), the six magnet (147) and the seven magnet (148) are matched to enable the shielding piece (13) to cover the conversion hole (12).

8. The automatic backwashing prefilter of claim 1 wherein: the improved filter is characterized in that a positioning box (17) is arranged in the raw water cavity (7), an impeller (18) is arranged in the positioning box (17) in a rotating mode, a rotating frame (19) is arranged in the raw water cavity (7), a flow guide hole (20) is formed in the positioning box (17), water flow can impact the impeller (18) through the flow guide hole (20), the rotating frame (19) is connected with the impeller (18), the rotating frame (19) is located on the outer side of the filter element (3), and a cleaning piece (30) capable of cleaning the filter element (3) and/or the raw water cavity (7) is arranged on the rotating frame (19).

9. The automatic backwashing prefilter of claim 8 wherein: be provided with in drain (10) and connect bolt (25), seted up on connecting bolt (25) and can with former water cavity (7) communicate external blowdown hole (26), blowdown hole (26) can with former water cavity (7) are linked together, the lower terminal surface of impeller (18) is seted up flutedly (22), be connected with center post (23) on connecting bolt (25), the upper end of center post (23) is provided with tip (24), tip (24) contradict in the bottom surface of recess (22).

10. The automatic backwashing prefilter of claim 8 wherein: the control component (4) comprises a blowdown valve (41), the blowdown valve (41) is connected with the connecting bolt (25), and the blowdown valve (41) can control the blowdown hole (26) to be opened or closed.

11. The automatic backwashing prefilter of claim 1 wherein: the outer side wall of the filter element (3) is connected with a limiting ring (21), and the lower end face of the limiting ring (21) can abut against the upper end face of the shielding piece (13).

12. The automatic backwashing prefilter of claim 1 wherein: an intercepting net (28) capable of covering the conversion hole (12) is arranged in the joint (2).

13. The automatic backwashing prefilter of claim 1 wherein: a protective shell (29) outside the filter bowl (1), and the protective shell (29) can surround the filter bowl (1).

14. The automatic backwashing prefilter of claim 1 wherein: the water through opening (9) is arranged on the filter bowl (1).

15. The automatic backwashing prefilter of claim 1 wherein: a partition plate (8) is arranged between the filter bowl (1) and the joint (2), and the water through port (9) is arranged on the partition plate (8).

16. The automatic backwashing prefilter of claim 1 wherein: be provided with separator (31) in joint (2), separator (31) can with water with joint (2) keep apart.

17. The automatic backwash pre-filter as set forth in claim 16, wherein: the separator (31) includes insulating tube one (311), insulating tube two (312) and spacer sleeve (313), insulating tube one (311) set up in water inlet channel (5), insulating tube one (311) can with limbers (9) intercommunication, insulating tube two (312) set up in outlet channel (6), spacer sleeve (313) set up in connect (2), spacer sleeve (313) can with water purification chamber (11) with insulating tube two (312) intercommunication.