CN215462403U

CN215462403U - Back flushing device of pre-filter

Info

Publication number: CN215462403U
Application number: CN202023292564.7U
Authority: CN
Inventors: 张雷
Original assignee: Suzhou Tengna Environmental Technology Co ltd
Current assignee: Suzhou Tengna Environmental Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-01-11
Anticipated expiration: 2030-12-30

Abstract

The utility model belongs to the technical field of water treatment, and relates to a backwashing device of a pre-filter. Comprises a bottle body, an outer bracket and a filter element. The bottle body is provided with a raw water inlet, a purified water outlet, a drain outlet and a drain valve. The outer support is arranged in the inner cavity of the bottle body. The filter element is arranged in the inner cavity of the outer bracket through the inner bracket. The filter element and the inner support move synchronously. The inner cavity of the filter element forms a first water flow channel, and a second water flow channel is formed between the outer surface of the filter element and the inner wall of the bottle body. Open the drain, can make inner support and filter core remove towards the drain to switch the rivers direction, make the water that gets into from the raw water inlet can get into first rivers passageway, second rivers passageway in proper order, discharge from the drain at last. The water that gets into from the raw water inlet can get into first rivers passageway, second rivers passageway in proper order, discharges from the drain at last to can constantly wash the filter core from inside to outside, in order to improve the effect of wasing the filter core.

Description

Back flushing device of pre-filter

Technical Field

The utility model belongs to the technical field of water treatment, and relates to a backwashing device of a pre-filter.

Background

In urban water supply, the quality of water for household use is deteriorated and the control of water using equipment is disabled due to secondary pollution such as rust, silt and the like in a pipeline, and the service life of other household appliances related to water use is reduced, even great potential safety hazards are generated, so that a pre-filter is required to be installed to improve the quality of water and protect the household water using equipment.

The pre-filter in the market at present mainly comprises a flush type, a siphon flush type and the like. However, different types of pre-filters suffer from different problems:

the flushing intensity of the forward flushing prefilter is very weak, the filter element is easy to block, and not only small impurities can not be flushed out, but also the filter element is embedded deeper and tighter, so that secondary pollution is easy to occur. Consumers need to open the shell to take the filter element out for brushing by the toothbrush, and the filter element can be cleaned up, which is time-consuming and labor-consuming.

The siphon type prefilter has a complicated structure and is not thoroughly washed. Impurities are easily embedded deeper and tighter in the filter element, which causes secondary pollution and even finally leads to the blockage of the filter element. Once the cartridge becomes clogged, maintenance is very difficult. On the other hand, most siphon-type prefilter products also require a filter precision to be configured in order to achieve a flushing effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a back washing device of a front filter, which is used for improving the effect of cleaning a filter element.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a pre-filter backwash assembly comprising:

a bottle body having a raw water inlet, a purified water outlet, a drain outlet, and a drain valve;

the outer support is arranged in the inner cavity of the bottle body;

the filter element is arranged in the inner cavity of the outer bracket through an inner bracket; the filter element and the inner support move synchronously; a first water flow channel is formed in the inner cavity of the filter element, and a second water flow channel is formed between the outer surface of the filter element and the inner wall of the bottle body; the sewage draining port is opened, the inner support and the filter element can move towards the sewage draining port to switch the water flow direction, so that water entering from the raw water inlet can sequentially enter the first water flow channel and the second water flow channel and finally is discharged from the sewage draining port.

Preferably, in the pre-filter backwashing device, the opening of the sewage discharge outlet generates siphon force to drive the inner support and the filter element to move.

Preferably, in the above backwashing device for a pre-filter, a reset piece is installed in the outer bracket, and the reset piece provides a reset force far away from the sewage outlet for the filter element.

Preferably, in the above-described pre-filter backwashing device, the return member is a return spring, and the return spring abuts against an end surface of the filter element.

Preferably, in the above pre-filter backwashing device, the return member is mounted at one end of the outer bracket near the sewage discharge outlet.

Preferably, in the above pre-filter backwashing device, the outer support comprises a first outer support and a second outer support, and the first outer support is in clamping fit with the second outer support.

Preferably, in the above-described pre-filter backwashing device, the outer support includes a first outer support and a second outer support, and the first outer support is rotatable relative to the second outer support.

Preferably, in the above backwashing device for the pre-filter, the backwashing device for the pre-filter further comprises a cleaning strip, an accommodating groove is formed in the outer wall of the first outer support, and a through hole is formed in the bottom wall of the accommodating groove; the cleaning strip comprises a strip body, a first scraping and washing part arranged on one side surface of the strip body and a second scraping and washing part arranged on the other side surface of the strip body; the first scraping and washing part at least partially extends out of the accommodating groove to be in contact with the inner wall of the bottle body, and the second scraping and washing part extends into the through hole to be in contact with the outer surface of the filter element.

Preferably, in the pre-filter backwashing device, the number of the holding tanks is at least two, and the at least two holding tanks are uniformly distributed along the circumferential direction.

Preferably, in the pre-filter backwashing device, the number of the second scraping parts of each cleaning strip is at least two, and at least two second scraping parts are arranged at intervals to form an interval area; the spaced regions of one of the cleaning strips are circumferentially aligned with one of the second wiping portions of the remaining cleaning strips.

The backwashing device of the pre-filter has the advantages that: the water that gets into from the raw water inlet can get into first rivers passageway, second rivers passageway in proper order, discharges from the drain at last to can constantly wash the filter core from inside to outside, in order to improve the effect of wasing the filter core.

Drawings

FIG. 1 is an overall view of a pre-filter backwash assembly according to an embodiment of the present invention;

FIG. 2 is a front view of the filter assembly of the pre-filter backwash assembly in accordance with an embodiment of the present invention;

FIG. 3 is a perspective view of the filter assembly of the pre-filter backwash assembly in accordance with an embodiment of the present invention;

FIG. 4 is a front perspective view of a cleaning strip in accordance with an embodiment of the present invention;

FIG. 5 is a rear perspective view of a cleaning strip in accordance with an embodiment of the present invention.

The component names and designations in the drawings are as follows:

the inner support 10, the main body end 11, the filter element 20, the outer support 40, the first outer support 41, the receiving groove 411, the perforation 412, the second outer support 42, the first water inlet 421, the bottle 50, the raw water inlet 51, the purified water outlet 52, the drain 53, the knob 54, the cleaning strip 60, the strip body 61, the first scraping and washing part 62, and the second scraping and washing part 63.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1, the present embodiment discloses a pre-filter backwash assembly. The pre-filter backwashing apparatus of this embodiment has two states of a normal operation state and a filter element 20 cleaning state.

The pre-filter backwashing device of the embodiment includes a bottle 50, and the bottle 50 is provided with a raw water inlet 51 and a purified water outlet 52. The raw water inlet 51 and the purified water outlet 52 are symmetrically distributed. The bottle 50 has a cartridge 20 therein. In a normal operation state, water entering the bottle 50 from the raw water inlet 51 is filtered by the filter element 20 and then flows out from the purified water outlet 52 for a user to use.

In order to facilitate the sewage discharge, the bottle body 50 is further provided with a sewage discharge outlet 53 and a knob 54 for controlling the opening or closing of the sewage discharge outlet 53. The rotation of the knob 54 controls the opening and closing of the waste outlet 53 by controlling the waste valve. When it is required to clean the filter element 20, water introduced into the bottle 50 from the raw water inlet 51 cleans the filter element 20, and after the cleaning is completed, sewage is discharged through the drain outlet 53. Then, the drain 53 is closed again, and the pre-filter backwashing device enters a normal working state.

The pre-filter backwash assembly of this embodiment further comprises an inner support 10 and a filter cartridge 20 mounted on the inner support 10. The pre-filter backwashing device of the embodiment further comprises an outer support 40, wherein the outer support 40 is arranged in the inner cavity of the bottle body 50, and the inner support 10 and the filter element 20 are arranged in the inner cavity of the outer support 40. The interior cavity of the filter element 20 defines a first flow path and a second flow path is defined between the exterior surface of the filter element 20 and the interior wall of the vial 50. Under normal working conditions, water entering from the raw water inlet 51 enters the second water flow channel through the first water inlet 421, then enters the first water flow channel after being filtered by the filter element 20, and finally is discharged from the purified water outlet 52. At this time, impurities in the water may be accumulated on the outer surface of the filter element 20 and may be even inserted into the filter holes. After a certain time interval, the filter element 20 needs to be cleaned to ensure the filtering effect of the filter element 20.

A return spring is installed in the outer bracket 40. The inner support 10 of the pre-filter backwashing device of the embodiment can move back and forth under the action of siphoning and a return spring so as to switch the water flow direction, so that the water flow flows from the first water flow channel to the second water flow channel or from the second water flow channel to the first water flow channel. Specifically, in a state of cleaning the filter element 20, the drain outlet 53 is opened, and the main body end 11 of the inner bracket 10 moves downward by a certain distance under the siphon action to switch the water flow passage, so that the water entering from the raw water inlet 51 enters the inner cavity of the filter element 20 at the top through the first water inlet 421. The water flow flushes the filter element 20 from the inside outwards to remove impurities from the filter element 20. The sewage after cleaning the filter element 20 enters the second water flow channel and is finally discharged from the sewage discharge port 53.

In this embodiment, the external frame 40 includes a first external frame 41 and a second external frame 42, and the first external frame 41 and the second external frame 42 are detachably connected to facilitate the assembly and disassembly of the external frame 40. In this embodiment, the first outer bracket 41 and the second outer bracket 42 are snap-fitted, and the connection is convenient. The first outer bracket 41 is positioned below the second outer bracket 42 and has a length longer than that of the second outer bracket 42. The first water inlet 421 is provided to the second outer holder 42. The return spring is mounted at the bottom of the inner cavity of the first outer bracket 41 and abuts against the lower end surface of the filter element 20.

In this embodiment, the inner frame 10, the filter element 20 and the outer frame 40 are assembled into a filter assembly, and the filter assembly can be integrally installed in the bottle body 50 or taken out of the bottle body 50, so that the filter assembly can be conveniently disassembled and assembled.

The first outer support 41 of this embodiment is rotatable relative to the second outer support 42. Specifically, the inner wall of the end of the first outer bracket 41 facing the second outer bracket 42 is provided with at least two catching strips extending in the circumferential direction. Accordingly, the outer circumferential surface of the end of the second outer bracket 42 facing the first outer bracket 41 has an annular catching groove. The clamping strip is in clamping fit with the clamping groove, and the clamping strip can rotate in the clamping groove, so that the first outer support 41 can rotate relative to the second outer support 42.

The outer wall of the first outer bracket 41 is provided with a receiving groove 411. The receiving groove 411 extends in parallel to the axial direction of the first outer bracket 41. The number of the receiving grooves 411 may be two. The two accommodation grooves 411 are evenly distributed in the circumferential direction. In other alternative embodiments, the number of the receiving slots 411 may also be one, three, four, etc.

As shown in fig. 3, 4 and 5, the cleaning strip 60 is installed in the receiving groove 411. The bottom of the receiving groove 411 has a through hole 412. The cleaning strip 60 includes a strip body 61, a first scraping portion 62 provided at one side of the strip body 61, and a second scraping portion 63 provided at the other side of the strip body 61. The first scraping and washing part 62 is at least partially protruded out of the receiving groove 411 to contact the inner wall of the bottle body 50. The second scraping and washing portion 63 extends into the through hole 412 to contact the outer surface of the filter element. When the first outer holder 41 is rotated, the first scraping and washing part 62 scrapes the inner wall of the bottle body 50. The second scraping and washing section 63 scrapes the outer surface of the filter element. The cleaning strip 60 provided in this embodiment can further improve the effect of cleaning the pre-filter. Especially, the effect of cleaning the filter element is better when the back washing is matched with the scraping and the cleaning of the cleaning strip 60.

Since the second scraping and washing part 63 is in contact with the outer surface of the filter element and the outer surface of the filter element is relatively rough, in order to reduce the friction between the second scraping and washing part 63 and the outer surface of the filter element and enable the first outer bracket 41 to smoothly rotate, the number of the second scraping and washing parts 63 of the present embodiment is at least two, for example, the number of the second scraping and washing parts 63 is three. The three second scraping and washing sections 63 are spaced apart along the length direction of the washing bar 60 to form spaced regions. The second scraping and washing parts 63 of the two washing strips 60 are staggered and leak-repaired with each other, that is, the spacing region of one washing strip 60 is aligned with one second scraping and washing part 63 of the other washing strips 60 in the circumferential direction, so that the whole outer surface of the filter element to be washed is washed, and missing parts are prevented.

The cleaning strip 60 of this embodiment may be an elastic rubber strip, integrally injection molded. In alternative embodiments, the cleaning strip 60 may be made of other materials.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pre-filter backwash device, comprising:

a bottle body (50), the bottle body (50) having a raw water inlet (51), a purified water outlet (52), a drain outlet (53) and a drain valve;

the outer support (40) is arranged in the inner cavity of the bottle body (50);

the filter element (20) is mounted in the inner cavity of the outer bracket (40) through an inner bracket (10); the filter element (20) moves synchronously with the inner support (10); the inner cavity of the filter element (20) forms a first water flow channel, and a second water flow channel is formed between the outer surface of the filter element (20) and the inner wall of the bottle body (50); the inner support (10) and the filter element (20) can move towards the sewage draining port (53) by opening the sewage draining port (53) so as to switch the water flow direction, so that water entering from the raw water inlet (51) can sequentially enter the first water flow channel and the second water flow channel and is finally discharged from the sewage draining port (53).

2. The pre-filter backwash assembly as defined in claim 1 wherein opening of the waste outlet (53) creates an siphoning force to drive movement of the inner support (10) and the filter cartridge (20).

3. The pre-filter backwash assembly as defined in claim 1 wherein a reset member is mounted in the outer housing (40) and provides a reset force to the filter element (20) away from the waste outlet (53).

4. The prefilter backflushing device according to claim 3 wherein said return member is a return spring, said return spring abutting an end face of said filter element (20).

5. A pre-filter backwash assembly as claimed in claim 3 wherein the return means is mounted at one end of the outer support (40) adjacent the waste outlet (53).

6. The pre-filter backwash assembly as defined in claim 1 wherein the outer leg (40) comprises a first outer leg (41) and a second outer leg (42), the first outer leg (41) snap-fitting with the second outer leg (42).

7. The pre-filter backwash assembly as defined in claim 1, wherein the outer support (40) comprises a first outer support (41) and a second outer support (42), the first outer support (41) being rotatable relative to the second outer support (42).

8. The pre-filter backflushing apparatus according to claim 7, further comprising a cleaning bar (60), wherein an outer wall of the first outer bracket (41) is provided with a receiving groove (411), and a bottom wall of the receiving groove (411) is provided with a through hole (412); the cleaning strip (60) comprises a strip body (61), a first scraping part (62) arranged on one side surface of the strip body (61) and a second scraping part (63) arranged on the other side surface of the strip body (61); the first scraping and washing part (62) at least partially extends out of the accommodating groove (411) to be in contact with the inner wall of the bottle body (50), and the second scraping and washing part (63) extends into the through hole (412) to be in contact with the outer surface of the filter element.

9. The pre-filter back-flushing device according to claim 8, characterized in that the number of the receiving tanks (411) is at least two, at least two of the receiving tanks (411) being evenly distributed in the circumferential direction.

10. The pre-filter backflushing apparatus according to claim 9, wherein the number of the second scraping portions (63) of each of the cleaning strips (60) is at least two, at least two of the second scraping portions (63) being arranged at intervals to form an interval region; the spaced-apart regions of one of the cleaning strips (60) are circumferentially aligned with one of the second scraping portions (63) of the remaining cleaning strips (60).