CN217567690U

CN217567690U - Back-washing pre-filter

Info

Publication number: CN217567690U
Application number: CN202220099829.1U
Authority: CN
Inventors: 曾维灵
Original assignee: Yuhuan Hongri Valve Co ltd
Current assignee: Yuhuan Hongri Valve Co ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-10-14
Anticipated expiration: 2032-01-13

Abstract

The utility model provides a back flush prefilter belongs to prefilter technical field. It has solved the poor problem of blowdown effect of current leading filter back flush. The back-flushing prefilter comprises a shell, wherein a sewage discharge end is arranged at the bottom of the shell, a cylindrical filter element is arranged in the shell, the top of the filter element is connected with a reversing seat, a first water passing end and a second water passing end which are communicated with the filter element are arranged in the circumferential direction of the reversing seat, a sealing part is arranged in the circumferential direction of the reversing seat, the sealing part is abutted against an inlet of the water outlet end and seals the water outlet end when the first water passing end is abutted against an outlet of the water inlet end, and the first water passing end is abutted against the inner wall of the shell to form sealing when the second water passing end is abutted against the inlet of the water outlet end. The sealing part can be abutted against the inlet of the water outlet end to seal the whole water outlet end in the back flushing process, so that sewage with dirt can be effectively prevented from flowing into the rear end pipeline from the water outlet end, the sewage is completely discharged from the sewage discharge end, and the sewage discharge effect is very good.

Description

Back-washing pre-filter

Technical Field

The utility model belongs to the technical field of leading filter, a leading filter is related to, especially relate to a back flush leading filter.

Background

The preposed filter is widely applied in our life in recent years, the prior preposed filter generally comprises a shell and a filter barrel arranged in the shell, and water flow enters from a water inlet end of the shell, is filtered by the filter barrel and then flows out from a water outlet end, so that the function of purifying water quality can be well achieved. Later, a prefilter with a back flush was invented, which has a basic structure similar to that of the previous prefilter, except that a sewage discharge port is generally arranged at the bottom of the housing of the prefilter with the back flush, and then a reversing valve is additionally arranged at the top of the filter cylinder to switch the water flow at the water inlet end to realize back flush sewage discharge.

The conventional structure of the reversing seat is generally a cylindrical structure with an opening at the lower end, a water passing end is generally arranged in the circumferential direction of the reversing seat, when the pre-filter filters water normally, the water passing end is in butt joint with an inlet of a water outlet end on the shell, and water flow entering the shell from the water inlet end can completely pass through the filter barrel and then enter the reversing seat to be discharged from the water outlet end; when the pre-filter is used for back washing, the sewage discharging end is opened firstly, then the water passing end turns around and is in butt joint with the outlet of the water inlet end, so that water entering the shell from the water inlet end firstly enters the reversing seat, then enters the inner cavity of the shell from the inside of the filter barrel to the outside and is finally discharged from the sewage discharging end, and dirt attached to the outer surface of the filter barrel is washed away. However, the existing backwashing prefilter has a common problem that when a sewage discharge end of a shell is opened during backwashing, a water outlet end on the shell is also opened, and if water with dirt which is washed out when water runs from the rear end of the prefilter flows into rear-end water utilization equipment from the water outlet end, unnecessary troubles are caused to water utilization.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a back flush prefilter. It solves the technical problem that the existing pre-filter has poor sewage discharge effect in backwashing.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a back flush prefilter, is including having the casing of intaking end and play water end, the casing bottom still has the blowdown end, install the filter core of tube-shape in the casing, the filter core top is connected with the switching-over seat, its characterized in that, the circumference of switching-over seat has all to cross water end one and cross water end two with the filter core intercommunication, the circumference of switching-over seat is equipped with the sealing, when crossing water end one and the export butt joint of intaking end the sealing supports and leans on the import of play water end and will go out water end seal, when crossing water end two and the import butt joint of play water end the end first end of crossing leans on and forms sealedly on the inner wall of casing.

The structure of the reversing seat is improved by the backwashing prefilter, the first water passing end and the second water passing end are arranged in the circumferential direction of the reversing seat, the first water passing end is used for backwashing, and the water passing end is butted with an outlet of the water inlet end in backwashing, so that water at the water inlet end completely enters the reversing seat and then washes the filter element outwards from the inside of the filter element.

The water passing end II is used for being butted with an inlet of a water outlet end when the front filter works normally, at the moment, the water passing end I is abutted against the inner side wall of the shell to form sealing, water flow entering the shell from the water inlet end can be filtered in the filter element and then enters the reversing seat to be discharged from the water outlet end, the design enables the water flow to be well purified, and the reverse washing and the normal use can be realized only by rotating the reversing seat, so that the use is very convenient.

In the backwash pre-filter, the reversing seat is of a cylindrical structure with an opening at the lower end, the first water passing end and the second water passing end are adjacently arranged, the central lines of the first water passing end and the second water passing end are perpendicular to each other, and the second water passing end is abutted against the inner wall of the shell to form sealing when the first water passing end is abutted against the outlet of the water inlet end.

Because the water inlet end and the water outlet end on the shell are arranged oppositely, the water passing end I and the water passing end II on the corresponding reversing seat are arranged adjacently, and the central lines of the two water passing ends are mutually vertical, so that the two water passing ends can be communicated with the water inlet end or the water outlet end in a staggered manner by the rotation of the reversing seat, and the structure design is ingenious and the use is very convenient.

In foretell leading filter of back flush, cross the port department of water end one and inlay and be equipped with sealing washer one, cross the port department of water end two and inlay and be equipped with sealing washer two, the sealing part is cyclic annular and inlays on its terminal surface and be equipped with sealing washer three.

When the water passing end I is in butt joint with the outlet of the water inlet end, the water passing end II needs to be sealed, and the sealing part also needs to seal the water outlet end; when the water passing end II is butted with an inlet of the water outlet end, the water passing end I needs to be sealed, so that the end parts of the water passing end I and the water passing end II are respectively embedded with a sealing ring, the sealing rings can enable the sealing rings to abut against the inner wall of the shell to form sealing when rotating to face the inner wall of the shell, when the water passing end I is butted with an outlet of the water inlet end, the sealing rings can also abut against the vicinity of the outlet to enable the water flow to completely flow into the reversing seat, and the sealing rings on the water passing end II can also abut against the vicinity of the inlet of the water outlet end to enable the water passing end II to be better in sealing performance when being butted with the inlet of the water outlet end. And a third sealing ring on the sealing part can better seal the water outlet end when the sealing part is abutted against the inlet of the water outlet end, and the sealing property is improved.

In the backwash pre-filter, the valve rod penetrates through the reversing seat, and a limiting structure is arranged between the reversing seat and the valve rod.

In the backwash pre-filter, the limiting structure comprises a tooth-shaped groove formed in the inner side of the reversing seat, a convex tooth part matched with the tooth-shaped groove is arranged on the valve rod, and the valve rod can drive the reversing seat to rotate through the matching of the convex part and the tooth-shaped groove.

In the back-washing pre-filter, a quick-opening valve capable of controlling the opening and closing of the sewage draining end is installed in the sewage draining end, the valve rod sequentially penetrates through the reversing seat and the filter element from top to bottom and is connected with the quick-opening valve, and the quick-opening valve can be controlled to be opened and closed through the rotation of the valve rod.

Compared with the prior art, the product has the advantages that: the structure of the reversing seat is improved by the backwashing prefilter, the first water passing end and the second water passing end are arranged in the circumferential direction of the reversing seat, the first water passing end is used for backwashing, and the water passing end is butted with an outlet of the water inlet end in backwashing, so that water at the water inlet end completely enters the reversing seat and then washes the filter element outwards from the inside of the filter element.

Drawings

Fig. 1 is a half sectional view of the present invention;

fig. 2 is a half sectional view in another direction of the present invention;

FIG. 3 is a part view of the reversing base of the present invention;

fig. 4 is a half sectional view of the reversing seat of the present invention.

In the figure, 1, a housing; 11. a water inlet end; 12. a water outlet end; 13. a blowdown end; 2. a filter element; 3. a valve stem; 4. a reversing seat; 41. a first water passing end; 42. a second water passing end; 43. a sealing part; 44. a first sealing ring; 45. a second sealing ring; 46. a third sealing ring; 5. a limiting structure; 51. a toothed groove; 52. a convex tooth part; 6. the valve is opened quickly.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The backwashing pre-filter comprises a shell 1 with a water inlet end 11 and a water outlet end 12, a sewage discharge end 13 is further arranged at the bottom of the shell 1, a quick-opening valve 6 capable of controlling the opening and closing of the sewage discharge end 13 is mounted in the sewage discharge end 13, a cylindrical filter element 2 is mounted in the shell 1, a brush is further wrapped on the outer side of the filter element 2, a circle of tooth grooves are formed in the inner side face of the bottom of the brush, a connecting rod penetrates through the bottom of the shell 1, the end of the connecting rod is inserted into the bottom of the brush and is provided with tooth parts matched with the tooth grooves, a servo motor is fixed outside the shell 1 and can drive the connecting rod to rotate, and the connecting rod can drive the brush to rotate to scrub the filter element 2. Be connected with switching-over seat 4 at filter core 2 top, valve rod 3 wears to establish in switching-over seat 4 and is equipped with limit structure 5 between switching-over seat 4 and the valve rod 3, and limit structure 5 has on the valve rod 3 with tooth groove 51 complex dogtooth portion 52 including seting up in the inboard tooth groove 51 of switching-over seat 4, and valve rod 3 can drive switching-over seat 4 through the cooperation of dogtooth portion 52 with tooth groove 51 and rotate. The valve rod 3 penetrates through the reversing seat 4 and the filter element 2 from top to bottom to be connected with the quick-opening valve 6, and the quick-opening valve 6 can be controlled to be opened and closed through rotation of the valve rod 3.

The structure of the reversing seat 4 is improved by the backwashing pre-filter, the reversing seat 4 is of a cylindrical structure with an opening at the lower end, the lower end of the reversing seat 4 is sleeved on the top of the filter element 2, the reversing seat 4 is circumferentially provided with a first water passing end 41 and a second water passing end 42, a sealing part 43 is arranged at the position, right opposite to the first water passing end 41, on the reversing seat 4, the sealing part 43 abuts against the inlet of the water outlet end 12 to form sealing when the first water passing end 41 is in butt joint with the outlet of the water inlet end 11, and the first water passing end 41 abuts against the inner wall of the shell 1 to form sealing when the second water passing end 42 is in butt joint with the inlet of the water outlet end 12. The first water passing end 41 is used for backwashing, the first water passing end is in butt joint with an outlet of the water inlet end 11 during backwashing, so that water at the water inlet end 11 completely enters the reversing seat 4 and then washes the filter element 2 outwards from the inside of the filter element 2, a sealing part 43 is further arranged at a position, right opposite to the water inlet end 11, on the reversing seat 4, the sealing part 43 can be abutted against an inlet of the water outlet end 12 during backwashing to seal the water outlet end 12 completely, sewage with dirt can be effectively prevented from flowing into a rear end pipeline from the water outlet end 12, the sewage is completely discharged from the sewage discharge end 13, and the sewage discharge effect is very good. The second water passing end 42 is used for abutting joint with an inlet of the water outlet end 12 when the pre-filter works normally, at this time, the first water passing end 41 abuts against the inner side wall of the shell 1 to form sealing, water flow entering the shell 1 from the water inlet end 11 enters the reversing seat 4 after being filtered by the filter element 2 and then is discharged from the water outlet end 12, the design enables the water flow to be well purified, and the back washing and the normal use can be realized only by rotating the reversing seat 4, so that the use is very convenient. The first water passing end 41 and the second water passing end 42 are arranged adjacently, the central lines of the first water passing end 41 and the second water passing end 42 are perpendicular to each other, and when the first water passing end 41 is in butt joint with the outlet of the water inlet end 11, the second water passing end 42 is abutted against the inner wall of the shell 1 to form sealing. Because the water inlet end 11 and the water outlet end 12 on the shell 1 are arranged oppositely, the water passing end I41 and the water passing end II 42 on the corresponding reversing seat 4 are arranged adjacently, and the central lines of the two water passing ends are perpendicular to each other, so that the two water passing ends can be communicated with the water inlet end 11 or the water outlet end 12 in a staggered manner by rotating the reversing seat 4, and the structural design is ingenious and the use is convenient.

A first sealing ring 44 is embedded at the port of the first water passing end 41, a second sealing ring 45 is embedded at the port of the second water passing end 42, and a third sealing ring 46 is embedded on the end surface of the annular sealing part 43. When the first water passing end 41 is in butt joint with the outlet of the water inlet end 11, the second water passing end 42 needs to be sealed, and the sealing part 43 also needs to seal the water outlet end 12; when the inlet of the water outlet end 12 is butted with the inlet of the water outlet end 42, the water outlet end 41 needs to be sealed, so that the end parts of the water outlet end 41 and the water outlet end 42 are respectively embedded with a sealing ring, the sealing rings can enable the sealing gaskets to abut against the inner wall of the shell 1 to form sealing when the end parts rotate to face the inner wall of the shell 1, the sealing gaskets can also abut against the vicinity of the outlet when the water outlet end 41 is butted with the outlet of the water inlet end 11, water flows into the reversing seat 4 completely, and the sealing gaskets on the water outlet end 42 can also abut against the vicinity of the inlet of the water outlet end 12 similarly, so that the sealing performance of the abutting joint of the water outlet end 42 and the inlet of the water outlet end 12 is better. The third sealing ring 46 on the sealing part 43 can make the sealing part 43 abut against the inlet of the water outlet end 12 to better seal the water outlet end 12, and the sealing performance is improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a back flush prefilter, includes casing (1) that has into water end (11) and play water end (12), casing (1) bottom still has blowdown end (13), install tube-shape filter core (2) in casing (1), filter core (2) top is connected with switching-over seat (4), be equipped with in casing (1) and drive switching-over seat (4) pivoted valve rod (3), its characterized in that, the circumference of switching-over seat (4) has all to cross water end one (41) and cross water end two (42) with filter core (2) intercommunication, the circumference of switching-over seat (4) is equipped with sealing (43), when crossing water end one (41) and the export butt joint of intaking end (11) sealing (43) support and lean on the import of play water end (12) and will go out water end (12) sealed, when crossing water end two (42) and the import of play water end (12) butt joint the water end one (41) support and lean on the inner wall of casing (1) and form sealedly.

2. The backwash prefilter according to claim 1, wherein said reversing seat (4) is a cylindrical structure with an open lower end, said first water passing end (41) and said second water passing end (42) are adjacently arranged and have their central lines perpendicular to each other, and when said first water passing end (41) is butted with the outlet of said water inlet end (11), said second water passing end (42) abuts against the inner wall of said housing (1) to form a seal.

3. The backwash prefilter according to claim 2, wherein a first seal ring (44) is embedded at the port of the first water passing end (41), a second seal ring (45) is embedded at the port of the second water passing end (42), the sealing part (43) is annular, and a third seal ring (46) is embedded on the end surface of the sealing part.

4. The backwashing prefilter of claim 1, 2 or 3 wherein said valve stem (3) is inserted into said reversing seat (4) and a limiting structure (5) is provided between said reversing seat (4) and said valve stem (3).

5. The backwashing prefilter of claim 4 wherein said limiting structure (5) comprises a toothed groove (51) formed inside said reversing seat (4), said valve rod (3) has a convex tooth portion (52) engaged with said toothed groove (51), said valve rod (3) can drive said reversing seat (4) to rotate by the engagement of said convex tooth portion (52) and said toothed groove (51).

6. A back washing pre-filter according to claim 5, characterized in that a quick-opening valve (6) capable of controlling the opening and closing of the sewage discharge end (13) is installed in the sewage discharge end (13), the valve rod (3) sequentially passes through the reversing seat (4) and the filter element (2) from top to bottom and is connected with the quick-opening valve (6), and the opening and closing of the quick-opening valve (6) can be controlled by the rotation of the valve rod (3).