CN214106038U - Front filter - Google Patents

Abstract

The utility model discloses a leading filter, include exoskeleton, bottle and locate the inboard filter screen of exoskeleton, exoskeleton is equipped with many and is used for striking off the inner wall of bottle with the strip of scraping of impurity on the filter screen, still include with the rotary drive subassembly that exoskeleton is connected, through the rotary drive subassembly drive the exoskeleton is rotatory so that scrape the strip and strike off the inner wall of bottle with impurity on the filter screen. The front filter not only can avoid the problem of influencing the normal use of the front filter due to the fact that the structure of product parts is not damaged easily due to manual scraping operation, but also can improve the dirt cleaning efficiency, reduce the labor intensity of workers and reduce the production cost.

Description

Front filter

Technical Field

The utility model relates to a filtration equipment technical field, in particular to leading filter.

Background

At present, a pre-filter is a first coarse filtration device for water used in a whole house, and can filter silt, rust, large-particle substances and the like in tap water, so that a large amount of precipitated impurities generated in a water supply network of a city and a community can be prevented from damaging human bodies, and a positive pre-protection effect is achieved on hidden laying pipelines, faucets, water heaters, boilers, central air conditioners, washing machines, dish washers, coffee machines and other water appliances (water purifiers, water purification machines and water dispensers). However, impurities on the scraping type prefilter filter bottle often need to be discharged through manual scraping, and when the impurities are manually scraped, the operation is inconvenient, and the improper operation easily damages the structures of product parts, so that the normal use of the prefilter is affected.

Therefore, how to avoid the inconvenience of manual scraping and pollution discharge operations is a technical problem that needs to be solved by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a leading filter can solve the manual inconvenient problem of blowdown operation of scraping and washing to can improve and scrape and wash efficiency.

In order to achieve the above object, the utility model provides a leading filter, include exoskeleton, bottle and locate the inboard filter screen of exoskeleton, exoskeleton is equipped with many and is used for striking off the inner wall of bottle with the strip of scraping of impurity on the filter screen, still include with the rotation driving subassembly that exoskeleton is connected, through the drive of rotation driving subassembly the exoskeleton is rotatory so that scrape the strip and strike off the inner wall of bottle with impurity on the filter screen.

Optionally, the rotary driving assembly comprises an impeller and a plurality of blades distributed along the circumferential direction of the impeller, the impeller is connected with the outer framework through a rotating shaft, and the blades are hit by water flow to enable the impeller to drive the rotating shaft and the outer framework to rotate.

Optionally, a blowdown effluent piece and a sealing plate for supporting the rotating shaft are arranged below the outer framework, and the impeller and all the blades are arranged inside the blowdown effluent piece.

Optionally, the blowdown play water spare is equipped with the apopore and is used for the water conservancy diversion runner that supplies the rivers to guide, warp water conservancy diversion runner's direction, rivers are followed the apopore is derived to directional hitting the blade.

Optionally, the rotating shaft is provided with an extending portion extending radially outward along the rotating shaft for carrying the impeller, and the sealing plate is provided with an annular supporting portion for contacting and abutting against a bottom surface of the extending portion.

Optionally, the sewage draining device further comprises a fixing frame screwed with the sewage draining water outlet piece in a threaded manner, and the fixing frame is screwed with the sewage draining water outlet piece in a threaded manner so as to fix the sealing plate between the sewage draining water outlet piece and the fixing frame.

Optionally, the inner side of the outer frame is provided with an inner frame for mounting the filter screen, the inner side of the inner frame is provided with a pressurizing piece, and the pressurizing piece is provided with a plurality of pressurizing holes for adjusting the water pressure of the outlet water to improve the flushing effect.

Optionally, all the pressure boost hole is the slant apopore, and during the play water, rivers impact the inner wall of slant apopore, in order to drive the pressure boost piece is rotatory.

Optionally, the number of scraping the strip is two, the exoskeleton is equipped with two and is used for installing two respectively the strip groove of scraping the strip and two are used for preventing respectively that the strip of scraping is scraped and is washed the strip lid that drops out during the filter screen.

Optionally, the scraping strip is an integrally formed silica gel scraping strip or an integrally formed brush.

Compared with the prior art, the embodiment of the utility model provides a leading filter, including exoskeleton, bottle, filter screen and rotation driving subassembly, the inboard of exoskeleton is located to the filter screen, and exoskeleton is equipped with many scrapes the strip, scrapes the strip and is used for scraping off the inner wall of bottle and the impurity on the filter screen, and rotation driving subassembly is connected with exoskeleton, and rotation driving subassembly is used for driving exoskeleton rotation, and it is rotatory with scraping the strip through rotation driving subassembly drive exoskeleton to the messenger scrapes the strip and strikes off the inner wall of bottle and the impurity on the filter screen. It can be seen that above-mentioned leading filter is through setting up the rotation driving subassembly, and it is rotatory with scraping the strip through the rotation driving subassembly drive exoskeleton, in order to realize striking off the purpose of the impurity of filter screen surface and bottle inner wall, thereby solve among the prior art through the inconvenient problem of manual blowdown operation of scraping, compare in manual scraping, above-mentioned mode of setting up not only can avoid because the manual structure of scraping the improper fragile product spare part of operation, so that influence the problem of the normal use of leading filter, and can improve the efficiency of decontaminating, reduce artifical intensity of labour, and the reduction in production cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pre-filter according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the waterway conversion member of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the plug of FIG. 1;

FIG. 4 is a schematic structural view of the water divider of FIG. 1;

FIG. 5 is a schematic view of the bottle of FIG. 1;

FIG. 6 is a schematic view showing an assembled structure of the dispenser and the bottle body of FIG. 1;

FIG. 7 is a schematic view of an assembled structure of the endoskeleton, plenum and lid of FIG. 1;

FIG. 8 is a schematic view showing an assembled structure of the outer frame, the wiper strip and the wiper strip cover in FIG. 1;

FIG. 9 is a schematic structural diagram of the exoskeleton of FIG. 1;

FIG. 10 is a schematic view of the outer frame of FIG. 1 from another angle;

FIG. 11 is a schematic illustration of the construction of the plenum of FIG. 1;

FIG. 12 is a schematic view of another angled construction of the plenum of FIG. 1;

FIG. 13 is a schematic view of the closure of FIG. 1;

FIG. 14 is a schematic view of the waste outlet of FIG. 1;

FIG. 15 is a schematic view of an assembly structure of the outer frame, the connecting rod, the rotating shaft, the impeller and the sewage draining and discharging member in FIG. 1;

FIG. 16 is a schematic view of the structure of the spindle in FIG. 1

FIG. 17 is a schematic structural view of the impeller of FIG. 1;

FIG. 18 is a schematic view of the assembled structure of the waterway conversion member, the plug, the connecting rod and the piston of FIG. 1;

FIG. 19 is a schematic view of the assembly of the waste outlet member, the sealing plate, the mounting bracket and the sealing member of FIG. 1;

FIG. 20 is a schematic structural view of the fixing frame of FIG. 1;

fig. 21 is a schematic view of a water flow in a filtering state of a pre-filter according to an embodiment of the present invention;

fig. 22 is a schematic view of the water flow of the pre-filter in a backwashing state according to the embodiment of the present invention.

Wherein:

1-valve head, 2-back flushing framework, 3-waterway conversion piece, 301-external thread, 4-water separator, 401-limit rib, 402-clamping groove, 403-oblique guide surface, 5-internal framework, 501-protrusion, 502-convex rib, 6-external framework, 601-central hole, 602-scraping groove, 603-scraping strip, 604-scraping strip cover, 7-bottle body, 701-limit groove, 8-pressurizing piece, 801-pressurizing hole, 802-notch, 9-sealing cover, 901-buckle, 10-plug, 1001-internal thread, 11-nut, 12-sewage discharge and water outlet piece, 1201-water outlet hole, 1202-guide flow channel, 13-sealing plate, 14-back flushing spring, 15-connecting rod, 16-rotating shaft, water distributor, etc, 17-impeller, 1701-blade, 18-piston, 1801-bearing surface, 1802-lower end surface, 19-sealing element, 20-drainage ball valve, 21-fixing frame and 2101-bayonet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a leading filter can solve the manual inconvenient problem of blowdown operation of scraping and washing to can improve and scrape and wash efficiency.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.

As shown in fig. 1, the embodiment of the present invention provides a pre-filter, which comprises a drainage ball valve 20, a bottle body 7 and a scraping filter element structure disposed in the bottle body 7, wherein a sealing member 19 is installed at the lower end of the bottle body 7, and the drainage ball valve 20 is installed at the lower end of the sealing member 19 for draining sewage.

Scrape and wash filter core structure and include exoskeleton 6, filter screen and rotation driving subassembly, exoskeleton 6 locates bottle 7 inboardly, exoskeleton 6's inboard is located to the filter screen, exoskeleton 6 is equipped with many scrapes strip 603, it is used for scraping the impurity on the inner wall of bottle 7 and the filter screen to scrape strip 603, rotation driving subassembly is connected with exoskeleton 6, rotation driving subassembly is used for driving exoskeleton 6 rotatoryly, it is rotatory with scraping strip 603 to drive exoskeleton 6 through rotation driving subassembly, so that scrape strip 603 and strike off the impurity on the inner wall of bottle 7 and the filter screen.

According to actual needs, the number of the scraping strips 603 is preferably set to two, correspondingly, the outer framework 6 is provided with two scraping strip grooves 602 and two scraping strip covers 604, the two scraping strip grooves 602 are in one-to-one correspondence with the two scraping strips 603, the scraping strip grooves 602 are used for installing the scraping strips 603, the scraping strip covers 604 are buckled on the outer framework 6, and the scraping strip covers 604 are used for preventing the scraping strips 603 from falling out when scraping and washing the filter screen.

Of course, the scraping strip 603 is an integrally formed silica gel scraping strip or an integrally formed brush, obviously, the silica gel scraping strip or the brush has elasticity, and is a soft scraping strip, in the scraping and washing process, the inner wall of the bottle body 7 and the surface of the filter screen are contacted and abutted through the scraping strip 603, and the effect of removing impurities can be realized to the greatest extent by utilizing the elastic deformation of the scraping strip 603.

It can be seen that above-mentioned leading filter is through setting up the rotation driving subassembly to drive exoskeleton 6 and scrape the strip 603 rotation through the rotation driving subassembly, in order to realize scraping the purpose of the impurity of filter screen surface and 7 inner walls of bottle, thereby solve among the prior art through the manual inconvenient problem of blowdown operation of scraping. Compare in manual scraping, above-mentioned mode of setting up not only can avoid because the structure of the improper fragile product spare part of manual scraping operation to influence the problem of leading filter's normal use, can improve the efficiency of decontaminating moreover, reduce artifical intensity of labour, reduce manufacturing cost.

Further, the above-mentioned rotation driving assembly may be specifically configured to include an impeller 17 and a plurality of blades 1701 uniformly distributed along a circumferential direction of the impeller 17, the impeller 17 is connected to the outer frame 6 through the rotating shaft 16, and the blades 1701 are hit by water flow so that the impeller 17 drives the rotating shaft 16 and the outer frame 6 to rotate.

The outer frame 6 is in interference fit with the rotating shaft 16. The outer frame 6 is provided with a central hole 601 at the bottom, the central hole 601 is used for matching and connecting with the rotating shaft 16, the inner wall of the central hole 601 is provided with two straight edges for corresponding to the outer walls of the two straight edges on the rotating shaft 16, and thus, the rotating shaft 16 can drive the outer frame 6 to rotate together when rotating. In addition, the top of the rotating shaft 16 is also connected with a nut 11 for realizing axial limiting.

Furthermore, a sewage discharging and water discharging piece 12, a sealing plate 13 and a fixing frame 21 are arranged below the outer framework 6, wherein the fixing frame 21 is screwed with the sewage discharging and water discharging piece 12 through threads, and the fixing frame 21 is screwed with the sewage discharging and water discharging piece 12 through threads so as to fix the sealing plate 13 between the sewage discharging and water discharging piece 12 and the fixing frame 21; shrouding 13 is used for supporting pivot 16, and impeller 17 and whole blade 1701 locate the inside of blowdown play water spare 12, and impeller 17 cup joints on pivot 16, and pivot 16 is equipped with along its radial outside extension and is used for bearing the extension of impeller 17, and shrouding 13 is equipped with annular supporting portion, and during the assembly, the top surface of annular supporting portion and the bottom surface contact counterbalance of extension realize the supporting role to realize axial spacing.

Specifically, the drainage outlet member 12 is provided with two outlet holes 1201 and two flow guide channels 1202, the flow guide channels 1202 are used for guiding water flow, and the water flow is guided out along the outlet holes 1201 by the flow guide channels 1202, so as to achieve the purpose of directionally striking the blades 1701. It should be noted that, due to the inertia of the diversion flow channel 1202, the water flows out of the water outlet hole 1201 and then can rotate clockwise, so that the water strikes the plurality of blades 1701 uniformly distributed on the impeller 17 in a predetermined direction, and when the water impacts the blades 1701, the water drives the impeller 17 to rotate.

On the basis, the inner side of the outer framework 6 is provided with the inner framework 5, the inner framework 5 is provided with the filter screen, the filter screen can be a stainless steel filter screen, and the inner framework 5 can prevent the stainless steel filter screen from deforming and flattening under the action of water pressure; meanwhile, the inner framework 5 is internally provided with a waterway conversion piece 3 which can be used for switching a waterway during pollution discharge so as to achieve a backwashing effect; the inboard of inner frame 5 still is equipped with pressure intensifying piece 8, and pressure intensifying piece 8 locates between water route converting part 3 and inner frame 5, and pressure intensifying piece 8 is equipped with a plurality of pressure boost holes 801 that are used for adjusting out water pressure in order to promote the washing effect.

Preferably, the pressurizing member 8 has 3 pressurizing holes 801 on the left and right sides, and the pressurizing holes function to reduce the area of the water outlet to increase the pressure of the outlet water when the water flow is equal, thereby achieving a better flushing effect.

In order to further improve the washing effect, all the pressurizing holes 801 are oblique water outlet holes, and when water flows out, water flow impacts the inner wall of the oblique water outlet holes to drive the pressurizing piece 8 to rotate 360 degrees, so that the filter screen can be washed by 360 degrees without dead angles.

In addition, the pressurizing piece 8 is further connected to the cover 9, specifically, two symmetrical notches 802 are arranged in front of and behind the pressurizing piece 8, and the two notches 802 are used for being buckled with two symmetrical buckles 901 on the cover 9, so that the pressurizing piece 8 is connected to the cover 9. Correspondingly, in order to prevent the pressurizing piece 8 and the sealing cover 9 from moving up and down, the inner frame 5 is provided with two protrusions 501, the protrusions 501 press the sealing cover 9, and the pressurizing piece 8 is indirectly pressed while the sealing cover 9 is pressed due to the clamping connection between the sealing cover 9 and the pressurizing piece 8, so that the pressurizing piece 8 and the sealing cover 9 can be prevented from moving up and down when the filtering and water purification backwashing states are switched.

More specifically, the O-shaped ring is arranged at the upper end of the waterway conversion member 3, and can prevent water from flowing into a water purification area from a gap between the waterway conversion member 3 and the inner framework 5 during filtering to influence the filtering effect; the lower end of the waterway conversion member 3 is in threaded connection with a plug 10, the plug 10 is connected with a piston 18 through a connecting rod 15, the bottom of the waterway conversion member 3 is provided with an external thread 301, and the external thread 301 is screwed with an internal thread 1001 on the plug 10 to realize the connection of the waterway conversion member 3 and the plug 10. Through the up-and-down movement of the waterway conversion piece 3, the switching between the two states of waterway filtration and pure water backwashing can be realized.

In addition, a silicon ring is arranged at the groove of the piston 18 and used for sealing the gap between the fixed frame 21 and the piston 18, so that water can be prevented from flowing through the gap between the fixed frame 21 and the piston 18 during pure water backwashing. In addition, two bayonets 2101 are arranged on the fixing frame 21, the two bayonets 2101 are buckled on the sealing piece 19, the up-and-down movement of the piston 18 can drive the silica gel ring arranged on the piston to move up and down together, a certain friction force is formed between the silica gel ring and the inner wall of the fixing frame 21, the fixing frame 21 is buckled on the sealing piece 19, and the fixing frame 21 cannot be driven to move up and down due to the friction force between the silica gel ring and the fixing frame 21.

When water pressure acts on the force bearing surface 1801 at the top of the piston 18, the piston 18 moves downward under the action of the water pressure, and the plug 10 is connected with the piston 18 through the connecting rod 15, so that the plug 10 can drive the water path switching member 3 screwed with the plug to move downward together, and the water path switching member 3 switches the filtering state into the pure water backwashing state.

It should be noted that the back flush framework 2 is arranged outside the water path conversion member 3, when the water path conversion member 3 moves down, water can enter the inside of the water path conversion member 3 along the water through hole of the back flush framework 2 to realize the flushing effect, and the back flush filter screen for filtering impurities is also arranged outside the back flush framework 2.

In order to achieve the effect of automatic switching, a back washing spring 14 is arranged inside the piston 18, and in a back washing state, the back washing spring 14 is in a compressed state, and at the moment, the back washing spring 14 can provide an elastic force for the piston 18 to move in a direction away from the drainage ball valve 20; when the drain ball valve 20 is closed, the water pressure acting on the force bearing surface 1801 of the piston 18 disappears, the piston 18 moves upward under the action of the back flush spring 14, and drives the plug 10 and the waterway conversion member 3 screwed therewith to move upward together, and the waterway conversion member 3 blocks the water through hole of the back flush framework 2, so that the purified water back flush state is converted into the filtration state by the waterway conversion member 3.

The front water filter is also provided with a water separator 4 connected with an inner framework 5, a plurality of inclined flow guide surfaces 403 are uniformly distributed on the water separator 4, and water flow can rotate clockwise after passing through the water separator 4. The rotation of the water flow generates a centrifugal force so that the impurities are not adsorbed on the bottle body 7, the exoskeleton 6 and the filter screen.

In order to facilitate the assembly of the water separator 4, the bottle body 7 and the inner frame 5, 4 limiting ribs 401 are uniformly distributed on the outer side wall of the water separator 4, and the 4 limiting ribs 401 are correspondingly arranged with 4 limiting grooves 701 on the bottle body 7 one by one; meanwhile, the inner wall of the water segregator 4 is also provided with a plurality of clamping grooves 402, and the clamping grooves 402 are correspondingly matched with the convex ribs 502 on the inner framework 5. It should be noted that the water diverter 4 is not carried along with the water flow when the water flow hits the inclined deflector surface 403 on the water diverter 4. Of course, the number of the limiting ribs 401 and the locking grooves 402 on the water separator 4 is not particularly limited.

The switching process of the normal filtration principle in two states of filtration and backwashing is specifically described as follows:

first, normal filtration state

The water flow diagram is shown in fig. 21. During normal filtration, the drain ball valve 20 is closed, the water pressure in each part of the interior of the bottle body 7 is basically consistent, at this time, the elastic force of the backwashing spring 14 acts on the plane of the piston 18 to prop against the piston 18, because the piston 18 is connected with the plug 10 by the connecting rod 15, the internal thread 1001 on the plug 10 is screwed with the external thread 301 on the waterway conversion member 3, that is, the elastic force of the stainless steel spring indirectly acts on the waterway conversion member 3, so that the waterway conversion member 3 can be propped against, and the water flow in the valve head 1 cannot enter the interior of the waterway conversion member 3 through the water through hole of the backwashing framework 2, so that the filtration state can be formed.

Specifically, source water enters from the water inlet end of the valve head 1, passes through the water separator 4, is filtered by the filter screen, and finally enters the water path conversion part 3. Wherein, it should be noted that, rivers can become clockwise rotation after water knockout drum 4, produce the rivers swirl, and the rivers rotation can produce centrifugal force for impurity can not adsorb on bottle 7, exoskeleton 6 and filter screen.

Second, the water purification back-flushing state

The water flow diagram is shown in fig. 22. The drainage ball valve 20 is rotated counterclockwise, the drainage ball valve 20 is opened, at this time, due to the negative pressure effect, the water pressure of the water flow in the bottle body 7 acts on the convex plane on the piston 18, the piston 18 moves downward under the water pressure effect, because the piston 18 is connected with the plug 10 through the connecting rod 15, the internal thread 1001 of the plug 10 is screwed with the external thread 301 on the waterway conversion piece 3 through the thread, and therefore, when the piston 18 moves downward under the water pressure effect, the waterway conversion piece 3 can be driven to move downward together. The water path conversion part 3 moves downwards to change the direction of water flow and change the filtering state into a clean water backwashing state (during backwashing, a backwashing filter screen is also arranged on the outer side of the backwashing framework 2, and during backwashing, water enters the water path conversion part 3 from the backwashing filter screen and flows from inside to outside to achieve a clean water backwashing effect).

When water is purified and backwashed, water flows from the inner side of the waterway conversion piece 3 to the outer side of the filter screen, when the water flows through the pressurizing piece 8, the pressurizing piece 8 can rotate for 360 degrees to discharge water outwards, the water flow flushing pressure can be increased, and the water is flushed more cleanly; when the blowdown goes out water spare 12, rivers can go out water by apopore 1201 after the water conservancy diversion runner 1202 water conservancy diversion on the blowdown goes out water spare 12, the water that apopore 1201 goes out can make water flow out clockwise because of the water conservancy diversion inertia of water conservancy diversion runner 1202, blade 1701 on impeller 17 is strikeed to water, drive impeller 17 rotates, when impeller 17 rotates, can drive exoskeleton 6 and rotate, the impurity on the inner wall of bottle 7 and the filter screen can be scraped to the strip 603 of scraping of installation on exoskeleton 6.

The water that the apopore 1201 on the blowdown exhalant spare 12 flows out again via apopore 1201 on the shrouding 13, because there is one section horizontal distance between two apopores 1201 on the blowdown exhalant spare 12, can make the apopore 1201 water that flows out all hit on impeller 17's blade 1701 like this, guarantees impeller 17's rotational speed, has guaranteed the rotational speed that the filter screen was scraped to the scraping strip 603 on the exoskeleton 6 promptly. Certainly, the diameters of the water outlets of the sewage discharging part 12 and the sealing plate 13 are relatively small, so that a siphon effect is achieved during sewage discharging, and large-particle impurities are conveniently discharged.

Thirdly, the filtering state is recovered

After the backwashing is finished, the ball valve is rotated clockwise, the ball valve is closed, the backwashing spring 14 rebounds, the elastic force acts on the lower end surface 1802 of the piston 18 to drive the piston 18 to move upwards, when the piston 18 moves upwards, the waterway conversion piece 3 is driven to move upwards together, the waterway conversion piece 3 moves upwards to change the direction of water flow, and the purified water backwashing state is converted into the filtering state.

Therefore, by adopting the pre-filter, water flow vortex can be generated in the water separator 4 during filtering, and centrifugal force is generated, so that impurities cannot be adsorbed on the bottle body 7, the outer framework 6 and the filter screen; when in washing, the water pressure is increased through the pressurizing piece 8, so that the filter screen is washed from inside to outside by rotating 360 degrees; on the basis, the outer framework 6 rotates, and the scraping strips 603 on the outer framework 6 continuously scrape and wash the outer side surface of the filter screen and the inner wall of the bottle body 7, so as to realize scraping and washing operation; simultaneously, leading filter still has the siphon effect through the setting of blowdown play water spare 12 and shrouding 13, makes things convenient for large granule impurity to discharge.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The above is a detailed description of the pre-filter provided by the present invention. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the solution and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The utility model provides a leading filter, its characterized in that includes exoskeleton (6), bottle (7) and locates the inboard filter screen of exoskeleton (6), exoskeleton (6) are equipped with many and are used for striking off the inner wall of bottle (7) with strip (603) of scraping of impurity on the filter screen, still include with the rotation driving subassembly that exoskeleton (6) are connected, through the rotation driving subassembly drive exoskeleton (6) are rotatory so that scrape strip (603) and strike off the inner wall of bottle (7) with impurity on the filter screen.

2. The prefilter of claim 1 wherein said rotary drive assembly comprises an impeller (17) and a plurality of blades (1701) distributed circumferentially around said impeller (17), said impeller (17) being connected to said outer frame (6) by a shaft (16), said blades (1701) being struck by water flow so that said impeller (17) rotates said shaft (16) and said outer frame (6).

3. The prefilter of claim 2 wherein a blowdown outlet member (12) and a closure plate (13) for supporting said shaft (16) are provided below said outer frame (6), and said impeller (17) and all of said vanes (1701) are provided inside said blowdown outlet member (12).

4. A pre-filter according to claim 3, characterised in that the waste outlet member (12) is provided with an outlet opening (1201) and a flow guide channel (1202) for guiding the flow of water, which is guided by the flow guide channel (1202) to be directed along the outlet opening (1201) to hit the vanes (1701) in an oriented manner.

5. A pre-filter according to claim 3, characterised in that the shaft (16) is provided with an extension extending radially outwardly thereof for carrying the impeller (17), the closure plate (13) being provided with an annular support for contact against the underside of the extension.

6. The prefilter of claim 3 further comprising a mounting bracket (21) threadably engaged with said waste outlet member (12), said mounting bracket (21) being threadably engaged with said waste outlet member (12) to secure said closure plate (13) between said waste outlet member (12) and said mounting bracket (21).

7. The pre-filter according to any of the claims 1-6, characterized in that the inner side of the outer frame (6) is provided with an inner frame (5) for mounting the filter screen, the inner side of the inner frame (5) is provided with a pressure increasing piece (8), and the pressure increasing piece (8) is provided with a plurality of pressure increasing holes (801) for adjusting the water pressure of the outlet water to improve the flushing effect.

8. The prefilter of claim 7 wherein all of said pressure boosting holes (801) are angled outlet holes, and wherein upon exiting water, water impacts the inner walls of said angled outlet holes to rotate said pressure boosting member (8).

9. The prefilter of claim 7 wherein said scraping strips (603) are two in number, and said outer frame (6) has two scraping grooves (602) for receiving said two scraping strips (603), respectively, and two scraping covers (604) for preventing said two scraping strips (603) from falling out when scraping said filter screen.

10. The prefilter of claim 9 wherein said wiper strip (603) is an integral silicone wiper strip or an integral brush.

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