CN219128476U - Transverse pre-filter with back flushing function - Google Patents
Transverse pre-filter with back flushing function Download PDFInfo
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- CN219128476U CN219128476U CN202223008066.4U CN202223008066U CN219128476U CN 219128476 U CN219128476 U CN 219128476U CN 202223008066 U CN202223008066 U CN 202223008066U CN 219128476 U CN219128476 U CN 219128476U
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Abstract
The utility model relates to a transverse pre-filter with a back flushing function, which comprises a filter flask, wherein a water inlet assembly and a water outlet and sewage disposal assembly are arranged in the filter flask, a filtering and back flushing unit is arranged in the filter flask, the filtering and back flushing unit comprises a filtering subunit and a back flushing subunit, the back flushing subunit is inserted in the filtering subunit, an original water cavity is arranged between the filtering subunit and the filter flask, a purified water cavity is arranged in the filtering subunit, the original water cavity is communicated with the purified water cavity through a filtering hole of the filtering subunit, the purified water cavity is communicated with a water outlet port, and the original water cavity is communicated with a base cavity and a sewage disposal port; a water inlet channel is arranged between the raw water cavity and the water inlet component, a backwash subunit control cover is arranged in the water inlet component, a backwash water channel is arranged in the backwash subunit control cover, and an adjusting component is arranged between the backwash subunit and the base. The pre-filter structure is optimized, can perform in-situ back flushing, has a good flushing effect, and can be matched with a transverse installation space.
Description
Technical Field
The utility model relates to a transverse pre-filter with a back flushing function, and belongs to the technical field of water purifying equipment.
Background
The municipal tap water has secondary pollution such as pipeline rust and sediment, and the quality of domestic water is poor, and a pre-filter is usually arranged on a household pipeline to improve the quality of the water. The filter element of the pre-filter in the market at present mainly takes a filter screen type structure, and the cleaning method of the filter element comprises forward flushing, back flushing, siphon cleaning or brushing and the like.
The prepositive filter in the prior art is in a T shape, the filter flask is vertically arranged on the machine head, and the filter element is also vertically arranged in the filter flask. Although the structure has good filtering effect, because the filter flask and the filter element have certain lengths, when the filter flask and the filter element are installed, a large installation space is often required to be occupied in the height direction, the filter flask and the filter element are limited by the installation space, and the filter flask and the filter element have large application limitation. The utility model aims to provide a transversely arranged prefilter which has an optimized structure and can be backwashed in situ.
Disclosure of Invention
The utility model aims to solve the defects of a T-shaped pre-filter in the prior art and provides a transverse pre-filter with a back flushing function. The pre-filter structure is optimized, can perform in-situ back flushing, has a good flushing effect, and can be matched with a transverse installation space.
The technical scheme adopted for solving the technical problems is as follows:
the transverse pre-filter with the back flushing function comprises a filter flask, wherein one end of the filter flask is provided with a water inlet assembly, the other end of the filter flask is provided with a water outlet and sewage draining assembly, the water outlet and sewage draining assembly is provided with a base, a water outlet port and a sewage draining port which are matched with the end parts of the filter flask, a base cavity is arranged in the base, a filtering and back flushing unit is arranged in the filter flask, the filtering and back flushing unit comprises a filtering subunit and a back flushing subunit, the back flushing subunit is inserted in the filtering subunit, an original water cavity is arranged between the filtering subunit and the filter flask, a purifying water cavity is arranged in the filtering subunit, the original water cavity is communicated with the purifying water cavity through a filtering hole of the filtering subunit, the purifying water cavity is communicated with the water outlet port, and the original water cavity is communicated with the base cavity and the sewage draining port; a water inlet channel is arranged between the raw water cavity and the water inlet component, a backwash subunit control cover is arranged in the water inlet component, a backwash water channel is arranged in the backwash subunit control cover, an adjusting component is arranged between the backwash subunit and the base or between the backwash subunit and the filtering subunit, the backwash subunit can axially move relative to the filtering subunit through the matching of the adjusting component, and the backwash subunit axially moves along the water inlet flow direction and can seal the water inlet channel and open the backwash water channel; the back flushing subunit moves axially against the water inflow direction and can open the water inflow channel and close the back flushing water channel.
Preferably, the water inlet assembly comprises a water inlet connecting piece and a water inlet end cover, the water inlet connecting piece is at least axially and fixedly connected with the filter flask, the water inlet end cover is coaxially arranged at the inner end of the water inlet connecting piece, the water inlet end cover is provided with a plurality of end cover water channels, the end cover water channels are communicated with the inner cavity of the water inlet connecting piece, the back flushing subunit control cover is fixedly arranged at the inner end of the water inlet end cover or integrally formed with the water inlet end cover, the back flushing subunit axially moves along the water inlet flow direction relative to the filter subunit, the end cover water channels can be disconnected with the water inlet channels and open the back flushing water channels, and the back flushing subunit axially moves relative to the filter subunit in the reverse water inlet flow direction, and the end cover water channels can be communicated with the water inlet channels and close the back flushing water channels.
Preferably, the adjusting component is arranged between the back flushing subunit and the base, the adjusting component comprises an elastic reset piece, the elastic reset piece is sleeved on the back flushing subunit, two ends of the elastic reset piece are respectively abutted against the inner wall of the base and the end part of the back flushing subunit, a pressure difference delta P is arranged at two sides of the end part of the back flushing subunit, delta P is more than or equal to 0, and when acting force corresponding to delta P is larger than the reacting force of the elastic reset piece, the elastic reset piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit axially moves against the water inflow direction;
or the adjusting component is arranged between the back flushing subunit and the filtering subunit, the adjusting component comprises an elastic resetting piece, the elastic resetting piece is sleeved on the back flushing subunit, the back flushing subunit is provided with a limiting part, two ends of the elastic resetting piece are respectively abutted against the limiting part and the inner wall of the filtering subunit, a pressure difference delta P exists at two sides of the end part of the back flushing subunit, delta P is more than or equal to 0, and when the acting force corresponding to delta P is larger than the reaction force of the elastic resetting piece, the elastic resetting piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit moves axially against the water inflow direction.
Preferably, the filtering subunit comprises a filter screen framework and a filter screen fixed on the filter screen framework, two ends of the filter screen framework are respectively provided with a first end cover and a second end cover, a water inlet channel is arranged on the first end cover, the back flush subunit comprises a back flush framework and a back flush filter screen fixed on the back flush framework, a back flush opening cover is arranged on one side of the back flush framework, which is positioned on the second end cover, a raw water through channel is arranged on the second end cover, a back flush opening cover is provided with a back flush drainage channel, a base cavity is communicated with the raw water cavity through the raw water through channel and the back flush drainage channel, a sealing part is arranged on the back flush framework at a position close to the outer side of the first end cover, the back flush filter screen is positioned in a back flush subunit control cover, the back flush subunit axially moves along the water inlet flow direction relative to the filtering subunit, and the sealing part can close the water inlet channel and simultaneously open the back flush filter screen; the back flushing subunit moves axially relative to the filtering subunit in the direction opposite to the water inflow direction, and the sealing part can open the water inflow channel and simultaneously close the back flushing filter screen.
Preferably, the adjusting component comprises an elastic resetting piece, the elastic resetting piece is sleeved on the back flushing framework, two ends of the elastic resetting piece are respectively abutted against the inner wall of the base and the back flushing opening end cover, a pressure difference delta P is arranged on two sides of the back flushing opening end cover, delta P is more than or equal to 0, and when acting force corresponding to delta P is larger than reacting force of the elastic resetting piece, the elastic resetting piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit axially moves against the water inflow direction;
or the elastic reset piece is sleeved on the back flushing framework, the back flushing framework is provided with a limit part, two ends of the elastic reset piece are respectively abutted against the limit part and the inner wall of the second end cover, the pressure difference delta P is more than or equal to 0 at two sides of the back flushing opening end cover, when the acting force corresponding to delta P is larger than the reaction force of the elastic reset piece, the elastic reset piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit moves axially against the water inflow direction.
Preferably, the elastic restoring member is an annular compression spring.
Preferably, the water inlet assembly is further provided with a pressure buffer device for preventing water hammer.
Preferably, the pressure buffer device comprises a cylinder body, an elastic element arranged in the cylinder body and a sealing cover, wherein an elastic element abutting part is arranged in the cylinder body, two ends of the elastic element are respectively abutted with the elastic element abutting part and the inner side of the sealing cover, and the sealing cover is in sliding sealing with the inner wall of the cylinder body; the outer surface of the sealing cover is communicated with the purified water cavity, when the pressure in the pre-filter rises, the elastic element can be compressed, and after the pressure rise is relieved, the elastic element can be reset.
Preferably, the drain port is provided with a drain valve, and the drain valve is a manual drain valve, an electric drain valve or a manual-automatic drain valve.
Preferably, sealing elements are arranged between the first end cover and the second end cover and the inner wall of the filter flask.
The beneficial effects of the utility model are as follows: the pre-filter structure is optimized, can clean water and back wash in situ, has a good flushing effect, and can be matched with a transverse installation space.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic illustration of the filtration and backwash unit of FIG. 1;
FIG. 3 is an exploded view of FIG. 2;
fig. 4 is a cross-sectional view of fig. 1 (filtering state);
fig. 5 is a sectional view (backwash sewage discharge state) of fig. 1.
In the figure: 1. the filter flask, 2, the water inlet assembly, 21, the water inlet connecting piece, 22, the water inlet end cover, 22a, the end cover water channel, 3, the water outlet pollution discharge assembly, 31, the base, 32, the water outlet port, 33, the pollution discharge port, 4, the filtering subunit, 41, the filter screen skeleton, 41a, the first end cover, 41a1, the water inlet channel, 41b, the second end cover, 41b1, the raw water channel, 42, the filter screen, 5, the back flushing subunit, 51, the back flushing skeleton, 52, the back flushing filter screen, 51a, the sealing part, 53, the back flushing opening cover, 53a, the back flushing water channel, 6, the back flushing subunit control cover, 7, the elastic reset piece, 8 and the pressure buffer device.
Detailed Description
The technical scheme of the utility model is further specifically described below through specific embodiments and with reference to the accompanying drawings.
Examples:
as shown in fig. 1-2, a transverse pre-filter with a back flushing function comprises a filter flask 1, wherein one end of the filter flask 1 is provided with a water inlet component 2, the other end of the filter flask 1 is provided with a water outlet and sewage disposal component 3, the water outlet and sewage disposal component 3 is provided with a base 31, a water outlet port 32 and a sewage disposal port 33 which are matched with the end of the filter flask 1, a base cavity is arranged in the base 31, a filtering and back flushing unit is arranged in the filter flask 1, the filtering and back flushing unit comprises a filtering subunit 4 and a back flushing subunit 5, the back flushing subunit 5 is inserted into the filtering subunit 4, an original water cavity is arranged between the filtering subunit 4 and the filter flask 1, a purified water cavity is arranged in the filtering subunit 4, the original water cavity is communicated with the purified water cavity through a filtering hole of the filtering subunit, and the purified water cavity is communicated with the water outlet port 32, and the original water cavity is communicated with the base cavity and the sewage disposal port 33; a water inlet channel is arranged between the raw water cavity and the water inlet component 2, a backwash subunit control cover 6 is arranged in the water inlet component 2, a backwash water channel is arranged in the backwash subunit control cover 6, an adjusting component is arranged between the backwash subunit 5 and the base 31, the backwash subunit 5 can axially move relative to the filtering subunit 4 through the matching of the adjusting component, and the backwash subunit 5 axially moves along the water inlet flow direction and can seal the water inlet channel and open the backwash water channel; the back flushing subunit 5 moves axially against the water inflow direction and can open the water inflow channel and close the back flushing water channel.
In this embodiment, the water inlet assembly 2 includes a water inlet connector 21 and a water inlet end cap 22, the water inlet connector 21 is at least fixedly connected axially (may be axially and circumferentially fixed, or may be axially fixed only), and axially rotatable, such as 360 degrees of rotation, and conventional selection is made according to the need), the water inlet end cap 22 is coaxially disposed at the inner end of the water inlet connector 21, the water inlet end cap 22 is provided with a plurality of end cap water channels 22a, the end cap water channels 22a are communicated with the inner cavity of the water inlet connector 21, the backwash subunit control cover 6 is fixedly disposed at the inner end of the water inlet end cap 22 or integrally formed with the water inlet end cap 22, the end cap water channels 22a can be disconnected from the water inlet channels and open the backwash subunit 5 axially moves in the water inlet direction relative to the filter subunit 4, and the end cap water channels 22a can be communicated with the water inlet channels and close the backwash water channels.
In particular to the present embodiment, the filtering subunit 4 includes a filter screen skeleton 41 and a filter screen 42 fixed on the filter screen skeleton 41, two ends of the filter screen skeleton 41 are respectively provided with a first end cover 41a and a second end cover 41b, a water inlet channel is arranged on the first end cover 41a, the back flush subunit 5 includes a back flush skeleton 51 and a back flush filter screen 52 fixed on the back flush skeleton 51, a back flush opening cover 53 is arranged on one side of the back flush skeleton 51 positioned on the second end cover 41b, the second end cover 41b is provided with a raw water through-channel 41b1, the back flush opening cover 53 is provided with a back flush drain channel 53a, a base cavity is communicated with the raw water cavity through the raw water through-channel 41b1 and the back flush drain channel 53a, a sealing part 51a is arranged on a part of the back flush skeleton 51 close to the outer side of the first end cover 41a, the back flush filter screen 52 is positioned in the back flush subunit control cover 6, the back flush subunit 5 moves axially along the water flow direction relative to the filtering subunit 4, and the sealing part 51a can close the water inlet channel, and simultaneously the back flush filter screen 52 is opened; the backwash sub-unit 5 moves axially against the water inflow direction relative to the filtration sub-unit 4, and the sealing portion 51a can open the water inflow passage while closing the backwash filter screen 52.
In this embodiment, the adjusting component includes an elastic reset piece 7, the elastic reset piece 7 is sleeved on the back flushing subunit 5, two ends of the elastic reset piece 7 are respectively abutted against the inner wall of the base and the end of the back flushing subunit 5, a pressure difference Δp exists between two sides of the end of the back flushing subunit 5, Δp is greater than or equal to 0, when the acting force corresponding to Δp is greater than the reaction force of the elastic reset piece 7, the elastic reset piece 7 is compressed, the back flushing subunit 5 moves axially along the water inflow direction, the water inflow channel is closed, and the back flushing filter screen 52 is opened; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece 7, the elastic reset piece 7 resets, the back flushing subunit 5 moves axially against the water inflow direction, the water inflow channel is opened, and the back flushing filter screen 52 is closed.
Preferably, the adjusting component comprises an elastic resetting piece, the elastic resetting piece is sleeved on the back flushing framework, two ends of the elastic resetting piece are respectively abutted against the inner wall of the base and the back flushing opening end cover, a pressure difference delta P is formed at two sides of the back flushing opening end cover, delta P is more than or equal to 0, when acting force corresponding to delta P is larger than reacting force of the elastic resetting piece, the elastic resetting piece is compressed, the back flushing subunit axially moves along the water inlet flow direction, and the water inlet channel is closed and the back flushing filter screen is opened; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, the back flushing subunit moves axially against the water inflow direction, the water inflow channel is opened, and the back flushing filter screen is closed.
In this embodiment, the elastic restoring member 7 employs a ring-shaped compression spring which is commonly and conventionally used.
In order to further prolong the service life of the pre-filter, the water inlet assembly 2 is also provided with a pressure buffer device 8 for preventing water hammer, the pressure buffer device 8 comprises a cylinder body, an elastic element arranged in the cylinder body and a sealing cover, the cylinder body is internally provided with an elastic element abutting part, two ends of the elastic element are respectively abutted with the elastic element abutting part and the inner side of the sealing cover, and the sealing cover is in sliding sealing with the inner wall of the cylinder body; the outer surface of the sealing cover is communicated with the purified water cavity, when the pressure in the pre-filter rises, the elastic element can be compressed, and after the pressure rise is relieved, the elastic element can be reset.
In this embodiment, the drain port 33 is provided with a drain valve, and the drain valve is a manual drain valve, an electric drain valve or a manual-automatic drain valve. Sealing elements are provided between the first and second end caps 41a, 41b and the inner wall of the filter flask 1.
The working principle of the utility model is as follows:
in the filtering state, the sewage discharge port 33 is closed, the base cavity is closed, the pressure difference DeltaP=0 at the two sides of the end part of the back flushing sub-unit 5 is in an initial state, the back flushing sub-unit 5 and the filtering sub-unit 4 are maintained in the initial state, a back flushing channel (a back flushing filter screen 52) of the back flushing sub-unit 5 is positioned in the back flushing sub-unit control cover 6, as shown in fig. 4, raw water enters from the water inlet assembly 2, flows through the water inlet channel through the end cover water channel 22a of the water inlet end cover, enters the raw water cavity, enters the purified water cavity after being filtered by the filtering sub-unit, and is discharged through the water outlet port;
in the back flushing and sewage draining state, the water outlet 32 is closed, the sewage draining port 33 is opened, the base cavity is correspondingly opened, the pressure difference at two sides of the end part of the back flushing subunit 5 is increased to be larger from DeltaP=0 until the corresponding acting force is larger than the reaction force of the elastic resetting piece, at the moment, the elastic resetting piece 7 is in a compressed state, the back flushing subunit 5 moves along the water inlet flow direction relative to the filtering subunit 4, the back flushing channel (back flushing filter screen 52) of the back flushing subunit 5 extends out of the back flushing subunit control cover 6 and is opened, as shown in fig. 5, the sealing part 53 seals the water inlet channel, raw water enters from the water inlet assembly 2, flows through the back flushing filter screen 52, enters the purified water cavity through the back flushing skeleton, the filter screen and the filter screen skeleton, flows into the raw water cavity, and then flows into the base cavity through the raw water through the water passing channel 41b1 and the back flushing drain channel 53a, and finally the back flushing of the filtering subunit is realized through the sewage draining port 33.
The beneficial effects of the utility model are as follows: the pre-filter structure is optimized, can perform in-situ water purification and back flushing, has a good flushing effect, and can be matched with a transverse installation space.
The above-described embodiment is only a preferred embodiment of the present utility model, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims. If the adjusting component is arranged between the back flushing subunit and the filtering subunit, specifically, the elastic resetting piece is sleeved on the back flushing skeleton 51, the back flushing skeleton 51 is provided with a limiting part, two ends of the elastic resetting piece 7 are respectively abutted against the limiting part and the inner wall of the second end cover 41b, and the arrangement mode is described in the patent of the utility model of the pre-filter component which can be back flushed in 201610948125.6.
Claims (10)
1. The utility model provides a horizontal leading filter with back flush function, includes the filter flask, filter flask one end is equipped with the subassembly that intakes, and the other end is equipped with out water blowdown subassembly, its characterized in that: the water outlet and sewage disposal assembly is provided with a base, a water outlet port and a sewage disposal port which are matched with the end parts of the filter flask, a base cavity is arranged in the base, a filtering and back flushing unit is arranged in the filter flask, the filtering and back flushing unit comprises a filtering subunit and a back flushing subunit, the back flushing subunit is inserted in the filtering subunit, an original water cavity is arranged between the filtering subunit and the filter flask, a purified water cavity is arranged in the filtering subunit, the original water cavity is communicated with the purified water cavity through a filtering hole of the filtering subunit, the purified water cavity is communicated with the water outlet port, and the original water cavity is communicated with the base cavity and the sewage disposal port; a water inlet channel is arranged between the raw water cavity and the water inlet component, a backwash subunit control cover is arranged in the water inlet component, a backwash water channel is arranged in the backwash subunit control cover, an adjusting component is arranged between the backwash subunit and the base or between the backwash subunit and the filtering subunit, the backwash subunit can axially move relative to the filtering subunit through the matching of the adjusting component, and the backwash subunit axially moves along the water inlet flow direction and can seal the water inlet channel and open the backwash water channel; the back flushing subunit moves axially against the water inflow direction and can open the water inflow channel and close the back flushing water channel.
2. The transversal pre-filter with backwash function according to claim 1, wherein: the water inlet assembly comprises a water inlet connecting piece and a water inlet end cover, the water inlet connecting piece is at least axially and fixedly connected with the filter flask, the water inlet end cover is coaxially arranged at the inner end of the water inlet connecting piece, the water inlet end cover is provided with a plurality of end cover water channels, the end cover water channels are communicated with the inner cavity of the water inlet connecting piece, the control cover of the back flushing subunit is fixedly arranged at the inner end of the water inlet end cover or integrally formed with the water inlet end cover, the back flushing subunit axially moves along the water inlet flow direction relative to the filter subunit, the end cover water channels can be disconnected with the water inlet channels and open the back flushing water channels, and the back flushing subunit axially moves relative to the filter subunit in the reverse water inlet flow direction, and the end cover water channels can be communicated with the water inlet channels and close the back flushing water channels.
3. The transverse pre-filter with the back flushing function according to claim 1 or 2, wherein the adjusting component is arranged between the back flushing subunit and the base, the adjusting component comprises an elastic reset piece, the elastic reset piece is sleeved on the back flushing subunit, two ends of the elastic reset piece are respectively abutted with the inner wall of the base and the end part of the back flushing subunit, a pressure difference delta P is arranged at two sides of the end part of the back flushing subunit, delta P is more than or equal to 0, and when acting force corresponding to delta P is larger than the reacting force of the elastic reset piece, the elastic reset piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit axially moves against the water inflow direction;
or the adjusting component is arranged between the back flushing subunit and the filtering subunit, the adjusting component comprises an elastic resetting piece, the elastic resetting piece is sleeved on the back flushing subunit, the back flushing subunit is provided with a limiting part, two ends of the elastic resetting piece are respectively abutted against the limiting part and the inner wall of the filtering subunit, a pressure difference delta P exists at two sides of the end part of the back flushing subunit, delta P is more than or equal to 0, and when the acting force corresponding to delta P is larger than the reaction force of the elastic resetting piece, the elastic resetting piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit moves axially against the water inflow direction.
4. The transverse pre-filter with the back flushing function according to claim 1 or 2, wherein the filtering subunit comprises a filter screen framework and a filter screen fixed on the filter screen framework, a first end cover and a second end cover are respectively arranged at two ends of the filter screen framework, a water inlet channel is arranged on the first end cover, the back flushing subunit comprises a back flushing framework and a back flushing filter screen fixed on the back flushing framework, a back flushing opening cover is arranged on one side of the back flushing framework positioned on the second end cover, a raw water through channel is arranged on the second end cover, a back flushing opening cover is provided with a back flushing drainage channel, a base cavity is communicated with the raw water cavity through the raw water through channel and the back flushing drainage channel, a sealing part is arranged at a part close to the outer side of the first end cover, the back flushing filter screen is positioned in a back flushing subunit control cover, the back flushing subunit axially moves relative to the filtering subunit along the water inlet flow direction, and the sealing part can close the water inlet channel and simultaneously open the back flushing filter screen; the back flushing subunit moves axially relative to the filtering subunit in the direction opposite to the water inflow direction, and the sealing part can open the water inflow channel and simultaneously close the back flushing filter screen.
5. The transverse pre-filter with the back flushing function according to claim 4, wherein the adjusting assembly comprises an elastic reset piece, the elastic reset piece is sleeved on the back flushing framework, two ends of the elastic reset piece are respectively abutted against the inner wall of the base and the back flushing opening end cover, a pressure difference delta P is arranged on two sides of the back flushing opening end cover, delta P is more than or equal to 0, and when acting force corresponding to delta P is larger than the reacting force of the elastic reset piece, the elastic reset piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit axially moves against the water inflow direction;
or the elastic reset piece is sleeved on the back flushing framework, the back flushing framework is provided with a limit part, two ends of the elastic reset piece are respectively abutted against the limit part and the inner wall of the second end cover, the pressure difference delta P is more than or equal to 0 at two sides of the back flushing opening end cover, when the acting force corresponding to delta P is larger than the reaction force of the elastic reset piece, the elastic reset piece is compressed, and the back flushing subunit axially moves along the water inflow direction; when the acting force corresponding to the delta P is smaller than the reaction force of the elastic reset piece, the elastic reset piece resets, and the backwashing subunit moves axially against the water inflow direction.
6. The transversal pre-filter with backwash function as set forth in claim 5, wherein: the elastic reset piece is an annular compression spring.
7. The transversal pre-filter with backwash function according to claim 1 or 2, wherein the water inlet assembly is further provided with a pressure buffer device preventing water hammer.
8. The transverse prefilter with backwash function according to claim 7, wherein the pressure buffer device comprises a cylinder, an elastic element arranged in the cylinder and a sealing cover, an elastic element abutting part is arranged in the cylinder, two ends of the elastic element are respectively abutted against the elastic element abutting part and the inner side of the sealing cover, and the sealing cover is in sliding sealing with the inner wall of the cylinder; the outer surface of the sealing cover is communicated with the purified water cavity, when the pressure in the pre-filter rises, the elastic element can be compressed, and after the pressure rise is relieved, the elastic element can be reset.
9. The transversal pre-filter with backwash function according to claim 1 or 2, wherein: the drain port is provided with a drain valve, and the drain valve is a manual drain valve or an electric drain valve or a manual-automatic drain valve.
10. The transversal pre-filter with backwash function according to claim 1 or 2, wherein: sealing elements are arranged between the first end cover and the second end cover and the inner wall of the filter flask.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223008066.4U CN219128476U (en) | 2022-11-11 | 2022-11-11 | Transverse pre-filter with back flushing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223008066.4U CN219128476U (en) | 2022-11-11 | 2022-11-11 | Transverse pre-filter with back flushing function |
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| Publication Number | Publication Date |
|---|---|
| CN219128476U true CN219128476U (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223008066.4U Active CN219128476U (en) | 2022-11-11 | 2022-11-11 | Transverse pre-filter with back flushing function |
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| Country | Link |
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| CN (1) | CN219128476U (en) |
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2022
- 2022-11-11 CN CN202223008066.4U patent/CN219128476U/en active Active
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