CN220633270U

CN220633270U - Back flush prefilter

Info

Publication number: CN220633270U
Application number: CN202321994795.3U
Authority: CN
Inventors: 胡效军; 陈志超; 顾博焕; 俞立兴; 段建新; 曹福江
Original assignee: Hangzhou Shuixiang Intelligent Technology Group Co ltd
Current assignee: Hangzhou Shuixiang Intelligent Technology Group Co ltd
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-03-22
Anticipated expiration: 2033-07-27

Abstract

The application discloses a back flush pre-filter, wherein a valve head is provided with a first water inlet and a water outlet; the top of the bottle body is in threaded connection with the valve head, and the bottom of the bottle body is provided with a sewage outlet; the inner framework is arranged in the bottle body and is provided with a second water inlet; the switching component is movably arranged in the inner framework and is positioned right below the water outlet, and is provided with a third water inlet used for switching the communication between the second water inlet and the first water inlet and the communication between the third water inlet and the first water inlet; the filter component is sleeved on the outer peripheral surface of the inner framework and is used for filtering impurities; the drain valve assembly is arranged at the drain outlet and used for opening and closing the drain outlet. The filter has improved self-cleaning ability to extend its useful life.

Description

Back flush prefilter

Technical Field

The application relates to the technical field of filters, in particular to a back flushing prefilter.

Background

The urban water supply pipeline is old and long, and rust, sediment and other impurities in the pipeline can cause the control failure of the water using equipment, so that a filtering device is required to be arranged on the water using equipment. The pre-filter is a first coarse filtering device for whole house water, can filter sediment, rust and large particulate matters in tap water, prevents a large amount of precipitation impurities generated in city and district water supply networks from damaging human bodies, and plays a positive pre-protection role on concealed pipelines, water faucets, water warmers, water heaters, boilers, central air conditioners, washing machines, dish washers, coffee machines, other water household appliances (water purifiers, water softeners) and the like.

In the prior art, the filter element of the pre-filter is generally a simple filter screen for filtering, the pre-filter is used for carrying out pollution discharge, accumulated impurities are discharged out of the filter flask, when the pollution discharge is carried out, the bottom is manually rotated to drive the framework to scrape the filter screen, so that the effect of cleaning is achieved, but sediment and impurities on the surface of the filter screen are difficult to wash out due to long-term adhesion and forgetting to carry out the periodical pollution discharge, the water yield at the rear end is reduced, and the service life of the filter element is influenced.

In view of the foregoing, it is a problem to be solved by those skilled in the art to improve the self-cleaning ability of the filter to extend the service life thereof.

Disclosure of Invention

It is an object of the present application to provide a backwash pre-filter that has improved self-cleaning capabilities to extend its useful life.

To achieve the above object, the present application provides a backwash pre-filter comprising:

the valve head is provided with a first water inlet and a water outlet;

the top of the bottle body is in threaded connection with the valve head, and the bottom of the bottle body is provided with a sewage outlet;

the inner framework is arranged in the bottle body and is provided with a second water inlet;

the switching component is movably arranged in the inner framework, is positioned right below the water outlet, and is provided with a third water inlet used for switching the second water inlet to be communicated with the first water inlet and the third water inlet to be communicated with the first water inlet;

the filtering component is sleeved on the outer peripheral surface of the inner framework and is used for filtering impurities;

the drain valve assembly is arranged at the drain outlet and used for opening and closing the drain outlet;

when the second water inlet is communicated with the first water inlet, water flows into the switching assembly through the first water inlet, the second water inlet, the filtering assembly and the inner framework in sequence, and finally flows out through the water outlet; when the third water inlet is communicated with the first water inlet, water flows sequentially pass through the first water inlet, the third water inlet, the switching assembly and the inner framework to wash the filtering assembly from inside to outside, and finally, the water flows are discharged through the sewage draining outlet.

Preferably, the switching assembly includes:

the switching piece is arranged in the inner framework, the top of the switching piece is provided with the third water inlet, and the peripheral surface of the switching piece is of a porous structure;

the net cover is arranged at the third water inlet and extends to the outer side of the third water inlet, when the switching piece moves upwards, the third water inlet is abutted to the water outlet, the extending end of the net cover is positioned in the water outlet, and the second water inlet is communicated with the first water inlet.

Preferably, the top outer peripheral surface of the switching piece is provided with a boss, and the inner skeleton comprises:

the outer peripheral surface of the first sleeve is tightly attached to the inner side wall of the bottle body, and the second water inlet is arranged along the length direction of the first sleeve;

one end of the second sleeve is arranged in the first sleeve, the other end of the second sleeve extends along the direction away from the valve head, and the outer circumferential surface of the second sleeve is of a porous structure;

when the switching piece moves downwards, the boss covers the second water inlet, the part extending end of the net cover extends out of the water outlet, and the third water inlet is communicated with the first water inlet.

Preferably, the method further comprises:

impeller, cover are established the telescopic top of second, and be located first sleeve lower extreme, its inside wall interval is provided with a plurality of water diversion blades, water diversion blade is located in the second water inlet, rivers pass through adjacent two clearance inflow between the water diversion blade the bottle with between the second sleeve.

Preferably, the filter assembly comprises:

the filter screen is sleeved on the outer peripheral surface of the second sleeve and is used for filtering smaller impurities;

the plurality of laminations are sleeved on the outer peripheral surface of the filter screen at intervals and are used for filtering larger impurities.

Preferably, the method further comprises:

an inner skeleton cover sleeved at the bottom of the second sleeve and used for preventing the lamination from falling;

and the silica gel piece is arranged between the inner framework cover and the lamination and is used for compressing the lamination.

Preferably, the method further comprises:

the base is sleeved on the top of the filter screen and is positioned at the upper end of the lamination;

the turbine is rotatably arranged on the base, a plurality of blades are arranged on the outer side wall of the turbine at intervals, and the blades are located right below the second water inlet.

Preferably, the method further comprises:

the outer framework is rotatably arranged between the filter assembly and the bottle body and is provided with a plurality of scraping strips, and the scraping strips are used for scraping and washing the outer peripheral surface of the filter assembly;

the piston is arranged at the bottom of the switching assembly and is respectively and tightly attached to the inner side wall of the inner framework and the inner side wall of the outer framework, and a fourth water inlet is formed in the side wall of the piston.

Preferably, the drain valve assembly includes:

the sealing piece is arranged in the sewage outlet, the top of the sealing piece is connected with the outer framework and is communicated with the fourth water inlet;

the top of the ball valve is arranged in the sealing piece and is provided with a drain knob.

In this application, the switching assembly serves to filter and reverse flush waterway switching within the inner frame. The inner framework is used for supporting the filter assembly and preventing the filter assembly from deforming under the action of water pressure. Closing the sewage outlet, moving the switching assembly upwards, enabling the filter to be in a filtering state, enabling the second water inlet of the inner framework to be communicated with the first water inlet of the valve head, filtering water through the filtering assembly, flowing into the switching assembly, and finally discharging water from the water outlet of the valve head; and opening the sewage outlet, allowing the switching assembly to move downwards, enabling the filter to be in a back flushing state, enabling a third water inlet of the switching assembly to be communicated with a first water inlet of the valve head, flushing the filtering assembly from inside to outside, and finally discharging water from the sewage outlet of the bottle body. Thus, the structure improves the self-cleaning capability of the filter, and further greatly prolongs the service life of the filter.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a backwash pre-filter according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a filtering principle of a back flush pre-filter according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a back flush principle of a back flush pre-filter according to an embodiment of the present application

Fig. 4 is a schematic structural diagram of a switching component according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an inner frame and an impeller according to an embodiment of the present disclosure;

FIG. 6 is a side view of the structure of an inner skeleton provided in an embodiment of the present application;

FIG. 7 is a schematic view of a filter assembly and an inner frame according to an embodiment of the present disclosure;

FIG. 8 is a schematic view of a turbine according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of an exoskeleton provided in an embodiment of the present application;

fig. 10 is a schematic structural view of a bottle body according to an embodiment of the present disclosure;

fig. 11 is a schematic installation diagram of an outer skeleton and an inner skeleton according to an embodiment of the present application.

Wherein:

10 is a valve head, 11 is a first water inlet, 12 is a water outlet, 20 is a bottle, 21 is a sewage outlet, 30 is an inner skeleton, 31 is a first sleeve, 311 is a convex rib, 312 is a buckle, 313 is a second water inlet, 32 is a second sleeve, 40 is a switching component, 41 is a switching component, 42 is a net cover, 43 is a third water inlet, 44 is a boss, 45 is a silica gel ring, 46 is an arc ring buckling position groove, 50 is an impeller, 51 is a water diversion blade, 52 is a groove, 60 is a filtering component, 61 is a lamination, 62 is a filter screen, 63 is an injection molding skeleton, 70 is a turbine, 71 is a blade, 80 is a base, 90 is an outer skeleton, 91 is a scraping strip, 100 is a piston, 101 is a fourth water inlet, 110 is a sealing component, 120 is a ball valve, 130 is an inner skeleton cover, and 140 is a silica gel component.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to better understand the aspects of the present application, a further detailed description of the present application will be provided below with reference to the accompanying drawings and detailed description.

The application provides a back flush pre-filter, which comprises a valve head 10, a bottle body 20, an inner framework 30, a switching component 40, a filtering component 60 and a drain valve component. Wherein the valve head 10 is provided with a first water inlet 11 and a water outlet 12; the top of the bottle body 20 is in threaded connection with the valve head 10, and the bottom is provided with a sewage outlet 21; the inner framework 30 is arranged in the bottle body 20 and is provided with a second water inlet 313; the switching assembly 40 is movably arranged in the inner framework 30 and is positioned right below the water outlet 12, and is provided with a third water inlet 43 for switching the second water inlet 313 to be communicated with the first water inlet 11 and the third water inlet 43 to be communicated with the first water inlet 11; the filter assembly 60 is sleeved on the outer circumferential surface of the inner frame 30 for filtering impurities; the drain valve assembly is arranged at the drain outlet 21 and is used for opening and closing the drain outlet 21; when the second water inlet 313 is communicated with the first water inlet 11, water flows into the switching assembly 40 through the first water inlet 11, the second water inlet 313, the filtering assembly 60 and the inner skeleton 30 in sequence, and finally flows out through the water outlet 12; when the third water inlet 43 is communicated with the first water inlet 11, water flows through the first water inlet 11, the third water inlet 43, the switching assembly 40 and the inner skeleton 30 sequentially from inside to outside to wash the filter assembly 60, and finally is discharged through the drain outlet 21.

Specifically, the left side of the valve head 10 is a water inlet, the right side is a water outlet 12, the diameters of the two are equal, one end of the two is communicated with the bottle body 20, and the other end is respectively communicated with a household pipeline. The top of the bottle body 20 is fitted with the internal thread of the valve head 10 by the external thread thereof, and a sealing ring is installed between the two threads for preventing water from flowing out of the bottle body 20 from between the two threads.

The switching assembly 40 performs a filtering and back flush waterway switching function inside the inner frame 30. The inner frame 30 is used for supporting the filter assembly 60, and preventing the filter assembly 60 from being deformed under the action of water pressure. Closing the sewage outlet 21, moving the switching assembly 40 upwards, enabling the filter to be in a filtering state, enabling the second water inlet 313 of the inner framework 30 to be communicated with the first water inlet 11 of the valve head 10, enabling water to flow into the switching assembly 40 after being filtered by the filtering assembly 60, and finally enabling water to be discharged from the water outlet 12 of the valve head 10; the drain outlet 21 is opened, the switching assembly 40 moves downwards, the filter is in a back flushing state, the third water inlet 43 of the switching assembly 40 is communicated with the first water inlet 11 of the valve head 10, the water washes the filter assembly 60 from inside to outside, and finally the water is discharged from the drain outlet 21 of the bottle body 20. Thus, the structure improves the self-cleaning capability of the filter, and further greatly prolongs the service life of the filter.

It should be noted that, the shapes of the inner frame 30 and the switching assembly 40 are not limited in this application, and a plurality of through holes may be provided at the positions of the inner frame 30 and the switching assembly 40 at the lower end of the bottle 20 to supply water to flow in and out.

In the specific embodiment of the present application, the switching component 40 includes a switching member 41 and a net cover 42. Wherein, the switching piece 41 is arranged in the inner framework 30, the top is provided with a third water inlet 43, and the peripheral surface is of a porous structure; the net cover 42 is disposed at the third water inlet 43 and extends to the outside of the third water inlet 43, when the switching member 41 moves upwards, the third water inlet 43 abuts against the water outlet 12, the extending end of the net cover 42 is disposed in the water outlet 12, and the second water inlet 313 is communicated with the first water inlet 11.

Specifically, the inner side wall of the top of the switching piece 41 is provided with an arc ring buckling position groove 46, the outer side wall of the net cover 42 is provided with an arc ring buckling position rib, and the arc ring buckling position groove 46 is matched with the arc ring buckling position rib to play a role of a movable buckle so as to detachably locate the net cover 42 in the switching piece 41. Meanwhile, an O-ring is arranged between the switching piece 41 and the inner framework 30 for preventing unfiltered water from flowing into the inner framework 30, and a silica gel ring 45 is sleeved on the outer circumferential surface of the upper end of the switching piece 41 for sealing a gap between the upper end of the switching piece 41 and the valve head 10 and preventing unfiltered water from flowing through the switching piece 41.

Further, a silica gel ring 45 is provided on the top outer circumferential surface of the net cover 42 for sealing the gap between the net cover 42 and the valve head 10 when the back-flushing pre-filter is in a filtering state, preventing unfiltered water from flowing into the water rear end from the gap, and the inner side wall of the net cover 42 is covered with an injection-molded net for performing a filtering when the water passes through the net cover 42 when the back-flushing pre-filter is in a back-flushing state.

In the specific embodiment of the present application, the top outer circumferential surface of the switching member 41 is provided with a boss 44, and the inner skeleton 30 includes the first sleeve 31 and the second sleeve 32. Wherein, the outer peripheral surface of the first sleeve 31 is closely attached to the inner side wall of the bottle body 20, and a second water inlet 313 is arranged along the length direction; one end of the second sleeve 32 is arranged in the first sleeve 31, the other end extends along the direction away from the valve head 10, and the outer peripheral surface of the second sleeve 32 is of a porous structure; when the switching member 41 moves down, the boss 44 covers the second water inlet 313, a part of the extending end of the net cover 42 extends out of the water outlet 12, and the third water inlet 43 communicates with the first water inlet 11.

A spring is further provided between the switching member 41 and the second sleeve 32. The compression of the spring between the second sleeve 32 and the switch 41 is an important component for switching the filtering and back flushing.

In the specific embodiment of the present application, the back flush prefilter further includes an impeller 50, sleeved on the top of the second sleeve 32, and located at the lower end of the first sleeve 31, where a plurality of water diversion blades 51 are disposed at intervals on the inner side wall of the impeller, the water diversion blades 51 are located in the second water inlet 313, and water flows into the space between the bottle body 20 and the second sleeve 32 through the gap between two adjacent water diversion blades 51.

Specifically, the outer side wall of the impeller 50 is provided with a groove 52, and the groove 52 is in fit with a rib 311 on the inner side wall of the first sleeve 31 to prevent the impeller 50 from moving left and right relative to the first sleeve 31, and then the buckle 312 on the first sleeve 31 is buckled with the impeller 50.

In the specific embodiment of the present application, filter assembly 60 includes a screen 62 and a plurality of laminations 61. Wherein, the filter screen 62 is sleeved on the outer peripheral surface of the second sleeve 32 for filtering smaller impurities; the plurality of laminations 61 are spaced around the outer periphery of the screen 62 for filtering larger contaminants.

Specifically, the filter screen 62 is sleeved on the outer peripheral surface of the second sleeve 32, and the second sleeve 32 is used for supporting the filter screen 62, so that the filter screen 62 is prevented from being deformed under the action of water pressure, and the filtering effect is lost. Meanwhile, a layer of plastic seal is injected at the gap between the filter screen 62 and the second sleeve 32 to prevent water flow from passing through the gap, the water is not filtered by the filter screen 62 and directly reaches the water purifying area, and the surface of the filter screen 62 forms a structure of an injection molding framework 63 after injection molding is completed.

Further, 64 lamination sheets 61 are sequentially sleeved on the injection molding framework 63, water flows sequentially pass through the lamination sheets 61 and the filter screen 62 during filtering, and when the water flows through the lamination sheets 61, the water flows are extruded into gaps between two adjacent lamination sheets 61, and thicker impurity scrap iron is trapped or accumulated between the two adjacent lamination sheets 61; as it flows through screen 62, water flows into inner frame 30, while finer impurities are retained.

In particular embodiments of the present application, the back flush pre-filter further includes an inner frame cover 130 and a silicone member 140. Wherein, the inner frame cover 130 is sleeved at the bottom of the second sleeve 32 for preventing the lamination 61 from falling down; the silicone member 140 is disposed between the inner frame cover 130 and the lamination 61, and is used for compressing the lamination 61.

Specifically, the inner frame cover 130 is in threaded engagement with the bottom of the second sleeve 32, and the silicone member 140 is pressed between the inner frame cover 130 and the lowermost lamination 61, and the lamination 61 is in a compressed but non-compressed state, so that impurities are squeezed between the lamination 61 to be spread outwards.

In a specific embodiment of the present application, the backflushing pre-filter further includes a base 80 and a turbine 70. Wherein, the base 80 is sleeved on the top of the filter screen 62 and is positioned at the upper end of the lamination 61; the turbine 70 is rotatably disposed on the base 80, and a plurality of blades 71 are disposed on an outer sidewall thereof at intervals, and the blades 71 are located directly below the second water inlet 313.

Specifically, the turbine 70 is supported by the base 80 on the uppermost lamination 61, and a plurality of blades 71 are distributed on the turbine 70, and the blades 71 are rotated when water flows in from the second water inlet 313, thereby performing a circumferential water-carrying function, so that the water flow is more sufficiently and uniformly washed between the bottle body 20 and the inner frame 30, and dirt adsorbed on the bottle body 20 and the inner frame 30 is washed away.

In a specific embodiment of the present application, the backflushing pre-filter further comprises an exoskeleton 90 and a piston 100. Wherein, the outer skeleton 90 is rotatably arranged between the filter assembly 60 and the bottle body 20, and is provided with a plurality of scraping strips 91, and the scraping strips 91 are used for scraping the outer peripheral surface of the filter assembly 60; the piston 100 is disposed at the bottom of the switching assembly 40 and is closely attached to the inner side walls of the inner frame 30 and the outer frame 90, and a fourth water inlet 101 is disposed on the side walls.

Specifically, the lower end of the outer frame 90 has an octagonal hole structure, and the lower structure of the rotary filter can drive the outer frame 90 to rotate, so that the scraping strips 91 on the outer frame 90 scrape the surface of the lamination 61. The piston 100 is threadedly engaged with the switching assembly 40, and the piston 100 can move up and down with the switching assembly 40. Meanwhile, sealing rings are arranged between the piston 100 and the inner skeleton 30 and between the piston 100 and the outer skeleton 90, so as to prevent water flow from flowing out of gaps between the piston 100 and the outer skeleton 90.

In a specific embodiment of the present application, the drain valve assembly includes a seal 110 and a ball valve 120. Wherein, the sealing element 110 is arranged in the sewage outlet 21, the top of the sealing element is connected with the outer framework 90 and is communicated with the fourth water inlet 101; the top of the ball valve 120 is located within the seal 110 with a drain knob.

The outer peripheral surface of the sealing member 110 is closely attached to the inner side wall of the bottle body 20, the upper end of the sealing member is closely matched with the octagonal hole structure of the outer skeleton 90, the ball valve 120 is arranged in the sealing member 110, and an O-shaped ring is arranged between the ball valve 120 and the sealing member 110.

Further, a drain knob is arranged on the ball valve 120 to play a role in flushing and draining sewage, the ball valve 120 is opened to drain sewage, and the ball valve 120 filter is closed to filter. When the drain ball valve 120 is opened, the switching member 41 moves downward, driving the piston 100 to move downward, and the scale impurities are discharged from the fourth water inlet 101.

Specifically, the filtering and backwashing switching principle of the backwashing pre-filter is as follows: closing the drain knob, restoring the spring to the original position, moving the switching assembly 40 upwards, enabling the filter to be in a filtering state, enabling the second water inlet 313 of the inner framework 30 to be communicated with the first water inlet 11 of the valve head 10, enabling water to flow in from the water diversion blades 51, enabling the water to bypass under the drive of the turbine 70, enabling the water to pass through the filtering assembly 60 for absorption and filtration, enabling larger particle impurities to be intercepted by the lamination 61, enabling fine particles to be intercepted by the inner filter screen 62, enabling the particles to flow into the switching member 41, and enabling the water to be conveyed to the rear end of the water through the water outlet 12 of the valve head 10; the drain knob is opened to enable the lower end of the bottle body 20 to be in a negative pressure state, the spring is compressed, the switching assembly 40 moves downwards, the filter is switched to a back flushing state, the second water inlet 313 of the inner framework 30 is sealed, the third water inlet 43 on the switching member 41 is communicated with the first water inlet 11, water flows into the switching member 41 through the net cover 42 at the upper end of the switching member 41, then flows into the inner framework 30, the filter screen 62 and the lamination 61 in sequence to carry out back flushing, meanwhile, the outer framework 90 at the tail part can be rotated to scrape and wash the surface of the lamination 61, small particles on the filter screen 62 and large particles on the lamination 61 are flushed out, and then discharged from the drain outlet 21 at the tail part of the bottle body 20.

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

Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims

1. A backwash pre-filter comprising:

the valve head is provided with a first water inlet and a water outlet;

2. The backwash pre-filter according to claim 1 wherein the switching assembly comprises:

3. The backwash pre-filter according to claim 2, wherein a top outer circumferential surface of the switching member is provided with a boss, and the inner skeleton comprises:

4. The backwash pre-filter according to claim 3 further comprising:

5. A backwash pre-filter according to claim 3 wherein the filter assembly comprises:

6. The backwash pre-filter of claim 5 further comprising:

7. The backwash pre-filter of claim 5 further comprising:

8. The backwash pre-filter according to any one of claims 1-7 further comprising:

9. The backwash pre-filter according to claim 8 wherein the drain valve assembly comprises: