CN211676542U - Pre-filter with top control back flush function - Google Patents
Pre-filter with top control back flush function Download PDFInfo
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- CN211676542U CN211676542U CN201921032240.4U CN201921032240U CN211676542U CN 211676542 U CN211676542 U CN 211676542U CN 201921032240 U CN201921032240 U CN 201921032240U CN 211676542 U CN211676542 U CN 211676542U
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Abstract
The utility model relates to a leading filter with back flush function of top control, it includes: the filter comprises a machine head with a water inlet and a water outlet, and a filter flask which is matched with the machine head and is provided with a sewage discharge piece capable of being sealed, wherein a filtering and backwashing mechanism is arranged in the filter flask, a raw water cavity is formed by a gap between the outside of the filtering and backwashing mechanism and the filter flask, a purified water cavity is formed in the filtering and backwashing mechanism, the filtering and backwashing mechanism comprises a filtering element and a backwashing element which is coaxially arranged, the raw water cavity can be communicated with the water inlet of the filtering element, the purified water cavity is communicated with the water outlet, the backwashing element can axially move relative to the filtering element and driven by external force, the backwashing element is fixedly connected with an external force output mechanism, and the external force output mechanism is arranged at the top of the machine. The utility model has the advantages of reasonable design, the equipment is simple and convenient, can realize the back flush through switching the runner.
Description
Technical Field
The utility model relates to a leading filter with back flush function of top control belongs to water treatment clarification plant technical field.
Background
The prior art pre-filter comprises: the filter flask that aircraft nose, upper end and aircraft nose are connected, the drainage sealing member of being connected with the filter flask lower extreme and the drainage ball valve of being connected with the drainage sealing member, be provided with the filter screen skeleton in the filter flask, the outer wall cover of filter screen skeleton is equipped with the filter screen. In the using process, water flows into a gap between the filter flask and the filter screen from the water inlet of the machine head, flows into the center of the filter screen framework after being filtered by the filter screen, and then flows to the water outlet of the machine head from the center of the filter screen framework.
With such a pre-filter, drinking water originating from a drinking water supply can be filtered before the drinking water is made available at the tap. The impurities accumulated in the filter screen gradually clog the filter screen. Thereby causing an undesirable pressure drop. Affecting the service life of the pre-filter. The manual unpicking and cleaning in the prior art has low cleaning efficiency and is easy to damage each component, therefore, a front filter component capable of backwashing needs to be designed, the filter screen is cleaned again by switching a flow passage and backwashing to generate water flow passing through the filter screen in the opposite direction, and water receiving impurities in the backwashing process is discharged through a drainage ball valve.
The utility model aims to solve the technical problem and provide a prefilter with top control backwashing function.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to solve the defects of the prior art and provide a pre-filter with top control back-washing function.
The utility model provides a technical scheme that its technical problem adopted is:
a pre-filter with top control backwash, comprising: the machine head is provided with a water inlet and a water outlet, the filter flask is matched with the machine head and is provided with a filter bottle capable of sealing a pollution discharge piece, a filtering and backwashing mechanism is arranged in the filter bottle, a gap between the outside of the filtering and backwashing mechanism and the filter flask forms a raw water cavity, the inside of the filtering and backwashing mechanism forms a purified water cavity, the filtering and backwashing mechanism comprises a filtering element and a backwashing element which is coaxially arranged, the raw water cavity can be communicated with the water inlet of the filtering element, the purified water cavity is communicated with the water outlet, the backwashing element can axially move relative to the filtering element and driven by external force to realize the switching of the filtering function and the backwashing function, the backwashing element is fixedly connected with an external force output mechanism mechanically, and the external force output mechanism is arranged at the top of the.
Preferably, the filter element consists of a filter screen body, a filter screen framework, and a water inlet end cover and a water discharge end cover which are positioned at two ends of the filter screen framework, the external dimension of the water inlet end cover is matched with the upper end part of the filter flask, the water inlet end cover is communicated with the inlet of the machine head, and a raw water cavity is formed between the filter screen body and the filter flask;
the back washing element comprises a back washing filter screen body, a back washing filter screen framework and a back washing filter screen lower sealing body with a drainage channel, the back washing filter screen body is sleeved on an assembly part of the back washing filter screen framework, an assembly cavity of the back washing filter screen body arranged in the machine head is provided, two ends of the assembly cavity are sealed, the back washing filter screen lower sealing body penetrates through a drainage end cover to be detachably connected with the back washing filter screen framework, the drainage end cover is circumferentially sealed with the lower end of the back washing filter screen framework, and the back washing filter screen framework and the back washing filter screen body can synchronously move axially relative to the filter element;
after the assembly part axially moves downwards for a certain stroke, the lower working surface of the assembly part can seal the water inlet end cover, and the backwashing filter screen body leaks out, so that the flow channel switching is realized, and the backwashing working mode is entered;
after the upward axial movement is carried out for a certain stroke, the lower working surface of the assembly part opens the water inlet end cover, the backwashing filter screen body is closed, the flow channel switching is realized, and the filtering working mode is entered.
Preferably, the external force output mechanism includes: the top of the machine head is provided with a driving shaft assembly cavity, the driving shaft is in threaded connection with the machine head and can be sealed, the driving shaft extends into the backflushing filter screen framework and is abutted against a lower sealing body of the backflushing filter screen in the backflushing filter screen framework, and the backflushing filter screen framework and the lower sealing body of the backflushing filter screen can be driven to move and rotate in the same axial direction.
Preferably, the manual drive knob includes knob body and setting element, and the knob body cup joints in the setting element and can dismantle with the drive shaft tip and be connected, and the setting element is fixed with drive shaft assembly chamber spiro union.
Preferably, the external force output mechanism includes: the drive shaft, rather than driving motor and the axial stroke control mechanism of tip hookup, the aircraft nose top is equipped with drive shaft assembly chamber, the drive shaft just can seal with the aircraft nose spiro union, in the drive shaft extends to the recoil washing filter screen skeleton, with the recoil washing filter screen in the recoil washing filter screen skeleton under the body butt of sealing, can drive the recoil washing filter screen skeleton and the recoil washing filter screen under the body axial motion and rotate jointly, through the positive and negative rotation of axial stroke control mechanism control driving motor, and then the axial motion stroke of drive shaft, axial stroke control mechanism includes limit switch.
Preferably, a first limiting part is arranged in the backwash filter screen framework, a second limiting part matched with the drive shaft is arranged on the drive shaft, and the axial displacement stroke of the drive shaft is controlled through the matching of the first limiting part and the second limiting part.
Preferably, a backwash water distribution member is arranged in the backwash element and generates a larger flow velocity with a smaller flow diameter, and the backwash water distribution member is sleeved on the driving shaft, has a relatively fixed axial position and can rotate around the driving shaft.
Preferably, the sewage discharging part of the filter bottle is provided with a cavity, the diameter of the middle part of the cavity is gradually reduced, and the diameters of the two ends of the cavity are gradually increased; when the filter is in a filtering state, the outer edge of the end part of the lower sealing body of the backwashing filter screen is matched with the part with the smallest diameter to realize the sealing of the pollution discharge piece, when the filter is switched to enter the backwashing state, the lower sealing body of the backwashing filter screen moves downwards under the driving action of external force to enter the part with the gradually increased diameter, a pollution discharge channel is formed between the lower sealing body of the backwashing filter screen and the cavity, and the pollution discharge piece is opened; at least the outer edge of the end part of the lower seal body of the backwashing filter screen has elastic deformation and reset functions.
Preferably, the backwash water distribution member is provided with a plurality of nozzles capable of jetting water flow in a tangential direction, and preferably, the nozzles of the backwash water distribution member are staggered in an axial direction.
Preferably, the outside of the filter element is further provided with a directional cleaning assembly, which comprises a flow guide part and an adjusting part, wherein the flow guide part comprises at least one flow guide groove extending along the axial direction of the filter element and an assembly seat fixed with the flow guide groove and capable of being matched with the bottom shape of the filter element, the assembly seat is provided with an assembly hole, the assembly seat is sleeved on the lower seal body of the backwashing filter screen through the assembly hole, and the bottom of the assembly seat is further provided with at least one limiting part;
the adjusting piece is provided with an assembling hole and a cavity matched with the assembling seat, the adjusting piece is sleeved on the lower sealing body of the backwashing filter screen through the assembling hole and can synchronously rotate, the edge of the cavity is provided with at least one limiting groove, and the side surface of the cavity is provided with at least one through hole;
when the lower sealing body of the back washing filter screen descends axially and rotates, the adjusting piece is driven, the flow guide piece is further driven to rotate around the filter element circumferentially, and back washing water is discharged through the through hole and the sewage discharge channel, so that back washing discharge of large granular impurities is realized;
during the upward rotation resetting process of the lower sealing body of the backwashing filter screen, the adjusting piece and the flow guide piece are dislocated, the through hole of the adjusting piece is closed, and backwashing water enters the sewage discharge channel along the gap between the flow guide piece and the adjusting piece to be discharged, so that negative pressure directional backwashing is realized.
Preferably, the drive shaft adopts split type design, including last drive shaft and lower drive shaft, goes up drive shaft and aircraft nose spiro union, and lower drive shaft can dismantle with last drive shaft and be connected.
The utility model has the advantages that: the utility model has the advantages of reasonable design, the equipment is simple and convenient, can realize the back flush through switching the runner. When the filter works, water passes through the water inlet end cover from the inlet of the machine head and enters the interior of the filter screen body from the exterior of the filter screen body through the raw water cavity, impurities are intercepted by the filter screen body, and purified water entering the interior flows to the outlet of the machine head from the top of the sealing cover through the back washing filter screen framework; when the backwashing filter screen is in a working state, the driving shaft is driven to move downwards through the external force output mechanism, the backwashing element moves downwards, the backwashing filter screen body leaks out of the sealing cover, the water inlet end cover is sealed on the lower working surface of the assembly part of the backwashing filter screen framework, the sewage discharging piece is opened at the same time, the flow channel switching is realized, the inlet water flows out from the inside after being filtered by the backwashing filter screen body, the backwashing filter screen body is backwashed, and the backwashing impurity-containing water flows out through the drainage channel of the backwashing filter screen lower sealing body and is discharged through the sewage discharging piece.
Drawings
FIG. 1 is a perspective view of a pre-filter of the present invention;
fig. 2 is an exploded view of the prefilter of the present invention;
FIG. 3 is a schematic view of the pre-filter assembly of the present invention;
FIG. 4 is a cross-sectional view of the pre-filter of the present invention in a filtered state;
FIG. 5 is a sectional view of the pre-filter of the present invention in a backwash state;
fig. 6 is a front view of a prefilter of example 2 of the present invention;
fig. 7 is an exploded view of a pre-filter according to embodiment 2 of the present invention;
fig. 8 is a cross-sectional view of a pre-filter according to embodiment 2 of the present invention.
In the figure: 1. a machine head, 2, a sewage discharging part, 3, a filter bottle, 4, a filter element, 41, a filter screen body, 42, a filter screen framework, 43, a water inlet end cover, 44, a water outlet end cover, 5, a backwashing element, 51, a backwashing filter screen body, 52, a backwashing filter screen framework, 52a, an assembly part, 53, a backwashing filter screen body assembly cavity, 54, a backwashing filter screen lower seal body, 6, a driving shaft, 61, a touch part, 6a, an upper driving shaft, 6b, a lower driving shaft, 7, a manual driving knob, 7a, a knob body, 7b, a positioning part, 8, a backwashing water distribution part, 8a, a nozzle, 9, a cavity, 10, a directional cleaning component, 11, a flow guide part, 11a flow guide groove, 11b, an assembly seat, 11c, a limiting part, 12, an adjusting part, 12a, a limiting groove, 12b, a through hole, 13, a driving motor, 14, a limiting switch, 15 and a fixed seat, 16. a protective cover.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific embodiments and with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 3, the prefilter having a top control backwash function includes: the device comprises a machine head 1 with a water inlet and a water outlet, and a filter flask 3 which is matched with the machine head 1 and is provided with a sewage discharge part 2 capable of being sealed, wherein a filtering and back-flushing mechanism is arranged in the filter flask 3, a gap between the outside of the filtering and back-flushing mechanism and the filter flask 3 forms a raw water cavity, a purified water cavity is formed in the filtering and back-flushing mechanism, the filtering and back-flushing mechanism comprises a filtering element 4 and a back-flushing element 5 which is coaxially arranged, the raw water cavity can be communicated with the water inlet of the filtering element 4, the purified water cavity is communicated with the water outlet, the back-flushing element 5 can axially move relative to the filtering element 4 driven by external force, the back-flushing element 5 is fixedly connected with an external force output mechanism mechanically, and the.
Specifically, as shown in fig. 2, the filter element 4 comprises a filter screen body 41, a filter screen framework 42, and a water inlet end cover 43 and a water outlet end cover 44 which are positioned at two ends of the filter screen framework 42, wherein the external dimension of the water inlet end cover 43 is matched with the upper end part of the filter flask 3, the water inlet end cover 43 is communicated with the inlet of the handpiece 1, and a raw water cavity is formed between the filter screen body 41 and the filter flask 3;
the backwashing element 5 comprises a backwashing filter screen body 51, a backwashing filter screen framework 52 and a backwashing filter screen lower sealing body 54 with a drainage channel, wherein the backwashing filter screen body 51 is sleeved on an assembly part 52a of the backwashing filter screen framework 52, an assembly cavity 53 of the backwashing filter screen body arranged in the machine head 1 is sealed at two ends, the backwashing filter screen lower sealing body 54 passes through a drainage end cover 44 and is detachably connected (sleeved or abutted) with the backwashing filter screen framework 52, the drainage end cover 44 is circumferentially sealed with the lower end of the backwashing filter screen framework 52, and the backwashing filter screen framework 52 and the backwashing filter screen body 51 can synchronously move axially relative to the filtering element 4;
when the water outlet valve moves downwards axially, the water inlet end cover 43 can be closed by the lower working surface of the assembly part 52a in a backwashing filtering state, the backwashing filter net body 51 leaks, and water at the water inlet of the machine head 1 can pass through the backwashing filter net body 51 to realize flow channel switching and enter a backwashing working mode.
After moving upward axially for a certain distance, the water inlet end cover 43 is opened on the lower working surface of the assembly part 52a, the backwashing filter screen body 51 is closed, the flow channel switching is realized, and the filtering operation mode is entered.
Specifically to the utility model discloses, as shown in fig. 2, external force output mechanism includes: the drive shaft 6 and be fixed in its tip manual drive knob 7, the aircraft nose 1 top is equipped with drive shaft 6 assembly chamber, and drive shaft 6 and aircraft nose 1 spiro union and can be sealed, and drive shaft 6 extends to in the back flush filter screen skeleton 52, seals 54 butt under the back flush filter screen in the back flush filter screen skeleton 52, can drive back flush filter screen skeleton 52 and back flush filter screen and seal 54 and move and rotate axially jointly.
In order to avoid the accidental separation of the driving shaft 6 and the machine head 1, the manual driving knob 7 comprises a knob body 7a and a positioning piece 7b, the knob body 7a is sleeved on the positioning piece 7b and detachably connected with the end part of the driving shaft 6 (the polygonal clamping and limiting is an implementation means), and the positioning piece 7b is in threaded connection with the driving shaft assembling cavity.
More specifically, a first limiting part 52c is arranged in the backwash filter screen framework 52, a second limiting part 6a matched with the drive shaft 6 is arranged on the drive shaft 6, and the axial displacement stroke of the drive shaft 6 is controlled by the matching of the first limiting part and the second limiting part.
For better backwashing effect, a backwashing water distributor 8 which generates a larger flow velocity with a smaller flow diameter is arranged in the backwashing element 5, and the backwashing water distributor 8 is sleeved on the driving shaft 6 and is relatively fixed in axial position and can rotate around the driving shaft 6.
In the utility model, as shown in fig. 4 and 5, the drainage member 2 of the filter flask 3 is provided with a cavity 9 with the middle part gradually reduced in diameter and the two ends gradually increased in diameter; when the filter is in a filtering state, the outer edge of the end part of the back washing filter screen lower sealing body 54 is matched with the part with the smallest diameter to realize the sealing of the pollution discharge piece 2, when the filter is switched to enter a back washing state, the back washing filter screen lower sealing body 54 moves downwards under the action of external force to enter a part with the gradually increased diameter, a pollution discharge channel is formed between the back washing filter screen lower sealing body 54 and the cavity 9, and the pollution discharge piece 2 is opened; at least the outer edge of the end part of the back washing filter screen lower sealing body 54 has elastic deformation and reset functions, and the sealing function and the opening function can be realized through elastic deformation and reset.
The utility model discloses in, it is better in order to realize the effect that the backwash water distributes, backwash water distribution piece 8 is equipped with a plurality of nozzles 8a, and it can follow tangential direction jet stream, and is preferred, backwash water distribution piece 8's nozzle 8a sets up along axial direction is crisscross.
In order to further realize negative pressure directional backwashing and improve the backwashing effect, a directional cleaning assembly 10 is further arranged outside the filter element 4 and comprises a flow guide part 11 and an adjusting part 12, the flow guide part 11 comprises at least one flow guide groove 11a extending along the axial direction of the filter element 4 and an assembly seat 11b which is fixed with the flow guide groove 11a and can be matched with the shape of the bottom of the filter element 4, the assembly seat 11b is provided with an assembly hole and is sleeved on a lower sealing body 54 of a backwashing filter screen through the assembly hole, and the bottom of the assembly seat 11b is further provided with at least one limiting part 11 c;
the adjusting piece 12 is provided with an assembling hole and a cavity matched with the assembling seat 11b, the adjusting piece is sleeved on the back washing filter screen lower sealing body 54 through the assembling hole and can synchronously rotate, the edge of the cavity is provided with at least one limiting groove 12a, and the side surface of the cavity is provided with at least one through hole 12 b;
when the back washing filter screen lower sealing body 54 moves downwards axially and rotates, the adjusting piece 12 is driven, the flow guide piece 11 is further driven to rotate circumferentially around the filter element 4, and back washing water is discharged through the through hole 12b and the sewage discharge channel, so that the back washing discharge of large granular impurities is realized;
during the upward rotation resetting process of the back washing filter screen lower sealing body 54, the adjusting piece 12 and the flow guide piece 11 are dislocated, the through hole 12b of the adjusting piece 12 is closed, and back washing water enters a sewage discharge channel along the gap between the flow guide piece 11 and the adjusting piece 12 to be discharged, so that negative pressure directional back washing is realized.
Specifically arrive the utility model discloses, drive shaft 6 is for processing convenience to and better adaptation, drive shaft 6 adopts split type design, including last drive shaft 6a and lower drive shaft 6b, go up drive shaft 6a and 1 spiro union of aircraft nose, lower drive shaft 6b can dismantle with last drive shaft 6a and be connected (if joint or spiro union), split type design has following advantage: the upper drive shaft 6a can be made larger in size to match the size of the handpiece 1 and the lower drive shaft 6b can be made smaller in size to ensure that the space inside the backwash element 5 is not excessively occupied.
Example 2
As an alternative, as shown in fig. 6 to 8, the other structure is basically the same as that of embodiment 1 except that an external force output mechanism includes: the device comprises a driving shaft 6, a driving motor 13 connected with the end of the driving shaft and an axial stroke control mechanism, wherein a driving shaft assembly cavity is arranged at the top of the machine head 1, the driving shaft 6 is in threaded connection with the machine head 1 and can be sealed, the driving shaft 6 extends into a backwashing filter screen framework 52 and is abutted against a backwashing filter screen lower sealing body 54 in the backwashing filter screen framework 52, the backwashing filter screen framework 52 and the backwashing filter screen lower sealing body 54 can be driven to move and rotate axially together, and the axial stroke control mechanism (such as a limit switch 14) is used for controlling the forward and reverse rotation of the driving motor 13 so as to drive the axial movement stroke of the driving shaft 6. Specific limiting switches 14 are 2, namely an upper limiting switch and a lower limiting switch, wherein the upper limiting switch and the lower limiting switch are assembled on the fixing seat 15, the outer part of the driving motor 13 can be detachably connected (screwed or clamped) with a protective cover 16, and the assembly distance of the upper limiting switch and the lower limiting switch meets the requirement of axial stroke. The operation of the upper and lower limit switches 14 is controlled by a touch portion 61 provided on the drive shaft 6.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (11)
1. A pre-filter with top control backwash, comprising: the device comprises a machine head with a water inlet and a water outlet, and a filter flask which is matched with the machine head and is provided with a sewage discharge piece capable of being sealed, wherein a filtering and backwashing mechanism is arranged in the filter flask, a gap between the outside of the filtering and backwashing mechanism and the filter flask forms a raw water cavity, the inside of the filtering and backwashing mechanism forms a purified water cavity, the filtering and backwashing mechanism comprises a filtering element and a backwashing element which is coaxially arranged, the raw water cavity can be communicated with the water inlet of the filtering element, and the purified water cavity is communicated with the water outlet.
2. The prefilter with a top-controlled backwashing function as claimed in claim 1, wherein said filter element is composed of a filter screen body, a filter screen skeleton, and a water inlet end cap and a water outlet end cap which are positioned at two ends of the filter screen skeleton, the external dimension of the water inlet end cap is adapted to the upper end of the filter flask, the water inlet end cap is communicated with the inlet of the machine head, and a raw water cavity is formed between the filter screen body and the filter flask;
the back washing element comprises a back washing filter screen body, a back washing filter screen framework and a back washing filter screen lower sealing body with a drainage channel, the back washing filter screen body is sleeved on an assembly part of the back washing filter screen framework, an assembly cavity of the back washing filter screen body arranged in the machine head is provided, two ends of the assembly cavity are sealed, the back washing filter screen lower sealing body penetrates through a drainage end cover to be detachably connected with the back washing filter screen framework, the drainage end cover is circumferentially sealed with the lower end of the back washing filter screen framework, and the back washing filter screen framework and the back washing filter screen body can synchronously move axially relative to the filter element;
after the assembly part axially moves downwards for a certain stroke, the lower working surface of the assembly part can seal the water inlet end cover, and the backwashing filter screen body leaks out, so that the flow channel switching is realized, and the backwashing working mode is entered;
after the upward axial movement is carried out for a certain stroke, the lower working surface of the assembly part opens the water inlet end cover, the backwashing filter screen body is closed, the flow channel switching is realized, and the filtering working mode is entered.
3. The prefilter having top-controlled backwashing functionality according to claim 1, wherein said external force output mechanism comprises: the top of the machine head is provided with a driving shaft assembly cavity, the driving shaft is in threaded connection with the machine head and can be sealed, the driving shaft extends into the backflushing filter screen framework and is abutted against a lower sealing body of the backflushing filter screen in the backflushing filter screen framework, and the backflushing filter screen framework and the lower sealing body of the backflushing filter screen can be driven to move and rotate in the same axial direction.
4. The prefilter with a top control backwash function as claimed in claim 3, wherein said manual drive knob comprises a knob body and a positioning member, said knob body is sleeved on said positioning member and detachably connected to the end of said drive shaft, and said positioning member is fixed to said drive shaft assembly cavity by screwing.
5. The prefilter having top-controlled backwashing functionality according to claim 1, wherein said external force output mechanism comprises: the drive shaft, rather than driving motor and the axial stroke control mechanism of tip hookup, the aircraft nose top is equipped with drive shaft assembly chamber, the drive shaft just can seal with the aircraft nose spiro union, in the drive shaft extends to the recoil washing filter screen skeleton, with the recoil washing filter screen in the recoil washing filter screen skeleton under the body butt of sealing, can drive the recoil washing filter screen skeleton and the recoil washing filter screen under the body axial motion and rotate jointly, through the positive and negative rotation of axial stroke control mechanism control driving motor, and then the axial motion stroke of drive shaft, axial stroke control mechanism includes limit switch.
6. The prefilter with a top control backwashing function as claimed in claim 3, 4 or 5, wherein a first limiting member is arranged in the backwashing filter screen framework, a second limiting member is arranged on the driving shaft, and the axial displacement stroke of the driving shaft is controlled by the cooperation of the first limiting member and the second limiting member.
7. The prefilter having top-controlled backwashing function according to claim 3, 4 or 5 wherein said backwashing element is provided with a backwashing water distributor which generates a larger flow velocity with a smaller flow diameter, said backwashing water distributor being mounted on said drive shaft in a relatively fixed axial position and being rotatable about said drive shaft, said backwashing water distributor being provided with nozzles which spray a stream of water in a tangential direction.
8. The prefilter having top-controlled backwashing functionality of claim 7 wherein said backwashing water distribution members have nozzles staggered in the axial direction.
9. The prefilter with top control back flushing function according to claim 3, 4 or 5, wherein said drainage member of said filter flask is provided with a cavity whose middle part is gradually reduced in diameter and whose two ends are gradually increased in diameter; when the filter is in a filtering state, the outer edge of the end part of the lower sealing body of the backwashing filter screen is matched with the part with the smallest diameter to realize the sealing of the pollution discharge piece, when the filter is switched to enter the backwashing state, the lower sealing body of the backwashing filter screen moves downwards under the driving action of external force to enter the part with the gradually increased diameter, a pollution discharge channel is formed between the lower sealing body of the backwashing filter screen and the cavity, and the pollution discharge piece is opened; at least the outer edge of the end part of the lower seal body of the backwashing filter screen has elastic deformation and reset functions.
10. The prefilter with a top-controlled backwashing function as claimed in claim 1, wherein a directional cleaning assembly is further arranged outside the filter element, and comprises a flow guide member and an adjusting member, wherein the flow guide member comprises at least one flow guide groove extending axially along the filter element and an assembly seat fixed to the flow guide groove and capable of adapting to the shape of the bottom of the filter element, the assembly seat is provided with an assembly hole through which the assembly seat is sleeved on the lower seal body of the backwashing filter screen, and the bottom of the assembly seat is further provided with at least one limiting member;
the adjusting piece is provided with an assembling hole and a cavity matched with the assembling seat, the adjusting piece is sleeved on the lower sealing body of the backwashing filter screen through the assembling hole and can synchronously rotate, the edge of the cavity is provided with at least one limiting groove, and the side surface of the cavity is provided with at least one through hole;
when the lower sealing body of the back washing filter screen descends axially and rotates, the adjusting piece is driven, the flow guide piece is further driven to rotate around the filter element circumferentially, and back washing water is discharged through the through hole and the sewage discharge channel, so that back washing discharge of large granular impurities is realized;
during the upward rotation resetting process of the lower sealing body of the backwashing filter screen, the adjusting piece and the flow guide piece are dislocated, the through hole of the adjusting piece is closed, and backwashing water enters the sewage discharge channel along the gap between the flow guide piece and the adjusting piece to be discharged, so that negative pressure directional backwashing is realized.
11. The prefilter with a top control backwashing function as claimed in claim 3 or 4, wherein said drive shaft is of a split design and comprises an upper drive shaft and a lower drive shaft, the upper drive shaft is screwed with the machine head, and the lower drive shaft is detachably connected with the upper drive shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921032240.4U CN211676542U (en) | 2019-07-04 | 2019-07-04 | Pre-filter with top control back flush function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921032240.4U CN211676542U (en) | 2019-07-04 | 2019-07-04 | Pre-filter with top control back flush function |
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| Publication Number | Publication Date |
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| CN211676542U true CN211676542U (en) | 2020-10-16 |
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| CN201921032240.4U Active CN211676542U (en) | 2019-07-04 | 2019-07-04 | Pre-filter with top control back flush function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404314A (en) * | 2019-07-04 | 2019-11-05 | 海宁市倍世环保科技有限公司 | Fore filter with top control backwashing function |
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2019
- 2019-07-04 CN CN201921032240.4U patent/CN211676542U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404314A (en) * | 2019-07-04 | 2019-11-05 | 海宁市倍世环保科技有限公司 | Fore filter with top control backwashing function |
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