CN211935852U - Back flush filter - Google Patents

Abstract

The utility model discloses a backwashing filter, which comprises a filter element; a water path conversion component arranged in the filter element and used to realize the conversion of a filtering water path and a backwashing water path; a sleeve is sleeved between the water path conversion component and the filter element There is a pressurizing part; the peripheral side of the pressurizing part has a plurality of narrow holes for concentrating water flow in the backwashing waterway to spray the inner wall of the filter element; a drain valve arranged under the filter element; the drain valve There are siphon holes connected to achieve siphoning. The backwash filter adopts the structure of flushing first and then siphoning to realize the backwashing of the filter element, so as to avoid the blockage of the backwashing water circuit due to improper operation; during the flushing process, the water in the filter element is collected through the narrow hole of the booster and then flows to the inner wall of the filter element. The spraying improves the impact effect on the impurities adhering to and accumulating on the filter element, thereby improving the cleanliness of backwashing.

Description

A backwash filter

technical field

The utility model relates to the field of filters, in particular to a backwash filter.

Background technique

The pre-filter is the first coarse filtration equipment for the whole house water, which can filter the sediment, rust and large particulate matter in the tap water. The pre-filter is usually installed behind the water meter of the inlet pipe to ensure that a large amount of precipitated impurities generated in the pipe network will not cause harm to the human body, and to play a positive role in protecting the hidden pipes, faucets, electrical appliances, etc.

Flushing the pre-siphon post filter is difficult to clean the dirt that adheres strongly to the filter screen, resulting in poor cleaning effect of the filter element.

Although the siphon pre-flush post filter has a good sewage effect on the strongly attached dirt on the filter screen, the sewage suction port must be very close to the filter screen, otherwise, the negative pressure suction of the siphon port will be weak, and the siphon effect will also be reduced. Great discount; but when the siphon mouth is close, it is difficult for large particles of dirt to enter the sewage channel, and it is easy to deposit in the filter bottle and cannot be discharged. In addition, the siphon pre-filter is easy to cause the outer ring of the backwash frame to absorb dirt due to improper operation, resulting in the backwash frame being unable to fully rebound, affecting the amount of water flow during filtration and backwashing, and even causing blockage and inability to pass water.

Utility model content

The purpose of the utility model is to provide a backwashing filter, which can prevent impurities from adhering and accumulating inside the filter, especially the filter element, thereby improving the cleaning effect of the backwashing.

In order to achieve the above purpose, the utility model provides a backwash filter, comprising:

filter element;

A waterway conversion assembly arranged in the filter element to realize the conversion of the filtering waterway and the backwashing waterway; a pressurized part is sleeved between the waterway conversion assembly and the filter element; the peripheral side of the pressurized part has multiple a narrow hole used to concentrate water flow in the backwashing waterway to spray the inner wall of the filter element;

A drain valve is arranged under the filter element; the drain valve is connected with a siphon hole for siphoning.

Preferably, the pressurizing member is rotatably connected to the filter element; the axis of any one of the narrow holes intersects with the diameter of the filter element.

Preferably, the upper end of the filter element is connected with a backwash frame; the water path conversion assembly includes a water path converter sleeved in the filter element and an elastic body connected to the lower end of the water path converter;

When the drain valve is opened, the water circuit converter moves downward under the action of water pressure and compresses the elastic body to expose the communication cavity between the backwash frame and the inner cavity of the filter element; the When the drain valve is closed, the elastic body rebounds and drives the water circuit converter to move upward to block the communication cavity.

Preferably, the water circuit converter includes a scroll rod inserted into the pressurizing member; the peripheral side of the scroll rod is provided with a water passage hole and a water flow vortex in the backwashing water circuit. spiral rib.

Preferably, an inner skeleton is sleeved between the inner circumference of the filter element and the outer circumference of the pressurizing member;

The first positioning plane on the upper end of the inner frame is used in the backwashing water channel to fit and support the water channel converter, so as to realize the axial stop of the water channel converter.

Preferably, the water path conversion assembly further comprises a piston connected between the elastic body and the water path converter; the upper end of the piston is fixedly connected with the water path converter, and the peripheral side of the piston is connected to the water path converter. The bottom end of the inner frame is sealed and connected, and the piston has two of the siphon holes.

Preferably, the bottom of the inner frame is provided with elastic snaps, and the bottom of the pressurizing member is connected with a cover;

The outer circumference of the cover is engaged with the elastic buckle; the cover ribs on the upper end surface of the cover are attached to the bottom surface of the inner frame.

Preferably, the filter element is inserted into the filter bottle body; a scraping strip is also arranged between the filter bottle body and the filter element; The scraping rib of the filter bottle body.

Preferably, the filter element is inserted into the filter bottle body; a water separator is also provided between the filter element and the filter bottle body; the water separator is rotatably connected to the upper end of the filter element, and the water separator is The wall surface of the water container has an oblique guide groove for forming a vortex in the filtered water channel.

Preferably, the top peripheral side of the pressurizing member has a plurality of water filtering holes; the filtering water holes are open to the inner cavity of the filter element in the filtering water channel, and are connected to the backwashing water channel in the backwashing water channel. The outer wall of the waterway conversion component is fitted and blocked.

Compared with the above-mentioned background technology, the backwash filter provided by the present invention includes a filter element, a water channel conversion component, a pressurizing member and a drain valve arranged below the filter element.

Among them, the drain valve is connected with a siphon hole for siphoning. During the backwashing process, the water entering the filter element flows to the siphon hole and the drain valve after passing through the water circuit conversion component, the pressurizing element and the filter element in sequence, that is, first flushing and then siphoning. This setting can prevent impurities from accumulating in the bottle body due to improper operation, which will affect the cleaning effect.

The water circuit conversion component is arranged in the filter element to realize the conversion of the filter water circuit and the backwash water circuit; wherein, when the filter water circuit is connected, the raw water flows from the outer periphery of the filter element to the inside of the filter element; when the backwash water circuit is connected, the water flows from the inside of the filter element to the outer periphery of the filter element flow.

The pressurizing piece is sleeved between the water circuit conversion component and the filter element, and the peripheral side of the pressurizing piece has a plurality of narrow holes. When the backwashing water circuit is connected, the water collects through the narrow holes, so as to be sprayed to the inner wall of the filter element, and the water adheres to the inner wall of the filter element. The impurities form an effective impact, thereby improving the cleanliness of the backwash.

To sum up, the backwash filter provided by the utility model adopts the method of flushing first and then siphoning to realize backwashing. The inner wall of the filter element is sprayed to avoid the accumulation of large particles and impurities, which adhere to the inner wall of the filter element and even the inner wall of the bottle body.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts.

1 is a schematic structural diagram of a backwash filter provided by an embodiment of the present invention;

2 is a schematic structural diagram of a backwash filter provided by an embodiment of the present utility model in a filtering state;

3 is a schematic structural diagram of a backwash filter provided by an embodiment of the present invention in a backwash state;

4 is a schematic structural diagram of a water circuit converter provided by an embodiment of the present invention;

5 is a cross-sectional view of a water circuit converter provided by an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a pressurizing member in a first direction provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a pressurizing member provided in an embodiment of the present invention in a second direction;

8 is a cross-sectional view of the pressurizing member provided by the embodiment of the present utility model along the radial direction at the narrow hole;

Fig. 9 is the partial assembly schematic diagram of the water circuit converter and the supercharger provided by the embodiment of the present utility model;

10 is a schematic structural diagram of an inner skeleton provided by an embodiment of the present invention;

Fig. 11 is the front view of Fig. 10;

12 is a partial schematic diagram of the inner skeleton at the elastic buckle provided by the embodiment of the present invention;

13 is a schematic structural diagram of the outer skeleton in the first direction provided by the embodiment of the present invention;

14 is a schematic structural diagram of the outer skeleton in the second direction provided by the embodiment of the present invention;

Figure 15 is a schematic structural diagram of the scraper provided by the embodiment of the present invention on one side of the outer scraper;

Fig. 16 is the structural schematic diagram of the inner scraping rib side of the scraping strip provided by the embodiment of the present utility model;

17 is a partial schematic diagram of a backwash filter provided by an embodiment of the present invention;

18 is a schematic structural diagram of a cover provided in an embodiment of the present invention in a first direction;

19 is a schematic structural diagram of the cover provided in the embodiment of the present invention in the second direction;

20 is a schematic structural diagram of a piston in a first direction provided by an embodiment of the present invention;

21 is a schematic structural diagram of a piston in a second direction provided by an embodiment of the present invention;

22 is a schematic structural diagram of a water separator provided by an embodiment of the present invention;

FIG. 23 is a schematic structural diagram of a mesh cover provided by an embodiment of the present invention;

FIG. 24 is a schematic structural diagram of a backwashing framework provided by an embodiment of the present invention.

Among them, 1- valve head, 2- pressure net cover, 201- snap foot, 202- pressure net cover groove, 3- backwash net, 4-backwash frame, 401-backwash frame tank, 402-support foot, 5-Water converter, 501-First groove, 502-Second positioning plane, 503-Second groove, 504-Second external thread, 505-Converter ribs, 506-Spiral ribs, 507-Water passing Hole, 6-water separator, 7-filter bottle, 8-external framework, 801-external framework groove, 802-first exoskeleton groove, 803-second exoskeleton groove, 81-external scraping ribs, 82 -Inner scraper, 9-pressurizing piece, 901-slot hole, 902-buckle notch, 903-filter hole, 10-inner frame, 1001-first positioning plane, 1002-first external thread, 1003-first One groove, 1004-Second groove, 1005-Boss, 1006-Elastic buckle, 1007-Inner frame gap, 11-Filter element, 12-Cover, 1201-Cover snap, 1202-Cover inner ring Face, 1203-covering rib, 13-filter cover, 14-gasket, 15-piston, 1501-piston inner thread, 1502-first piston groove, 1503-siphon hole, 1504-second piston groove , 1505-piston plane, 1506-cross rib, 16-elastomer, 17-seal, 18-drain valve.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1 to 24. FIG. 1 is a schematic structural diagram of a backwash filter provided by an embodiment of the present invention; FIG. 2 is a structural schematic view of the backwash filter provided by an embodiment of the present invention in a filtering state; FIG. 3 is a schematic structural diagram of a backwash filter provided by an embodiment of the present utility model in a backwashing state; FIG. 4 is a structural schematic diagram of a water circuit converter provided by an embodiment of the present utility model; FIG. 5 is an embodiment of the present utility model. A cross-sectional view of the provided water circuit converter; FIG. 6 is a schematic structural diagram of the pressurized part provided by the embodiment of the present invention in the first direction; FIG. 7 is a schematic view of the pressurized part provided by the embodiment of the present invention in the second direction. Schematic diagram of the structure; FIG. 8 is a cross-sectional view of the pressurized part provided by the embodiment of the present utility model along the radial direction at the narrow hole; FIG. 9 is a partial assembly schematic diagram of the water circuit converter and the pressurized part provided by the embodiment of the present invention; 10 is a schematic structural diagram of the inner frame provided by the embodiment of the present invention; FIG. 11 is a front view of FIG. 10 ; FIG. 12 is a partial schematic diagram of the inner frame provided by the embodiment of the present invention at the elastic buckle; FIG. 13 A schematic diagram of the structure of the outer frame provided by the embodiment of the present invention in the first direction; FIG. 14 is a schematic diagram of the structure of the outer frame provided by the embodiment of the present invention in the second direction; FIG. 15 is provided by the embodiment of the present invention. Figure 16 is a schematic diagram of the structure of the scraper on the side of the outer scraper; Figure 16 is a schematic diagram of the structure of the scraper on the inner side of the scraper provided by the embodiment of the utility model; Figure 17 is the backwash filter provided by the embodiment of the utility model. 18 is a schematic structural diagram of the cover provided by the embodiment of the present invention in the first direction; FIG. 19 is a schematic structural diagram of the cover provided by the embodiment of the present invention in the second direction; The structural schematic diagram of the piston provided by the embodiment of the utility model in the first direction; FIG. 21 is the structural schematic diagram of the piston provided by the embodiment of the utility model in the second direction; FIG. 22 is the water separator provided by the embodiment of the utility model. Figure 23 is a schematic structural diagram of a press mesh cover provided by an embodiment of the present invention; Figure 24 is a schematic structural schematic diagram of a backwash skeleton provided by an embodiment of the present invention.

The utility model provides a backwash filter, which comprises a filter element 11, a water path conversion component arranged in the filter element 11, and a drain valve 18 arranged below the filter element 11; That is, the direction of water entering and leaving the filter element 11 is changed; wherein, the drain valve 18 is connected with a siphon hole 1503 for siphoning, so as to realize flushing first and then siphoning.

In order to ensure the flushing effect before siphoning, a pressurizing member 9 is sleeved between the water channel conversion component and the filter element 11 , and the peripheral side of the pressurizing member 9 has a plurality of narrow spaces for concentrating the water flow in the backwashing water channel to spray the inner wall of the filter core 11 . hole 901.

During the backwashing process, the water first enters the interior of the filter element 11 . Since the water path conversion assembly and the pressurizing member 9 are arranged in the filter element 11 , the water flows through the water path conversion assembly and the pressurizing member 9 in sequence, and the water is passed through the narrowing of the pressurizing member 9 . The hole 901 flows toward the filter element 11 . Due to the limitation of the size of the narrow hole 901 , the water collects near the narrow hole 901 and is sprayed to the inner wall of the filter element 11 , thereby effectively impacting off the impurities adhering and accumulating on the filter element 11 . In addition, when spraying on the bottle body, it can impact the impurities adhering to and accumulating on the bottle body, thereby further improving the cleaning effect.

The structural arrangement and implementation of the waterway conversion assembly in the above-mentioned embodiments are not unique, and a variety of specific implementations can also be provided in the prior art. Therefore, the structure of the water channel conversion assembly can be set with reference to the related structure of the prior art.

In order to facilitate the filtration process, the water entering the filter element 11 can easily and quickly enter the pressurizing member 9 , and the peripheral side of the top end of the pressurizing member 9 has a plurality of water filtering holes 903 .

The filter water hole 903 is open to the inner cavity of the filter element 11 when the backwash filter is in the filtering state, so that the water entering the filter element 11 can easily and quickly enter the water circuit conversion assembly through the filter water hole 903; When the backwashing filter is in the backwashing state, it is attached and blocked with the outer wall of the water channel conversion assembly to ensure that the water in the water channel conversion assembly can only flow out from the narrow hole 901 and cannot flow out through the filter water hole 903 .

The specific implementation of opening and blocking the water filter hole 903 depends on the specific structure and operation principle of the water channel conversion assembly, including but not limited to the opening and blocking of the water filter hole 903 through the up-and-down movement or rotational movement of the water channel conversion assembly.

The backwash filter provided by the utility model not only adopts the siphon rear structure and the narrow hole 901 structure, but also can be combined with the scraping structure. 18 is connected, when the drain valve 18 is rotated to open and close, the scraper will rotate along with it, and the scraper attached to the outer circumference of the filter element 11 will hang up the impurities attached to the outer circumference of the filter element 11 when it rotates, so as to scrape the filter element 11.

Wherein, the scraper can be specifically set as a silicone scraper.

The wiper strip and the drain valve 18 can be connected through the outer frame 8. Exemplarily, the lower end of the filter bottle body 7 is equipped with a sealing member 17, and the lower end of the sealing member 17 is equipped with a drainage valve 18; the upper end of the sealing member 17 is engaged with the outer frame 8 , the lower end is screwed with the drain valve 18, and the outer frame 8 will rotate when the sealing member 17 is rotated.

The outer frame 8 is also provided with a first outer frame groove 802 and a second outer frame groove 803. The first outer frame groove 802 and the second outer frame groove 803 are used to install two scrapers respectively. When the outer frame 8 rotates Scraper strip for scraping. The outer frame 8 is also provided with an outer frame groove 801 on which an O-shaped sealing ring is installed to seal the outer frame 8 and the bottle body. The longitudinal direction of the first outer frame groove 802 and the longitudinal direction of the second outer frame groove 803 are parallel to the axial direction of the outer frame 8 , and the outer frame groove 801 is arranged around the peripheral side of the outer frame 8 .

The first exoskeleton groove 802 and the second exoskeleton groove 803 may be the same length as the filter element 11, or may be smaller than the length of the filter element 11. For the latter, the first exoskeleton groove 802 and the second exoskeleton groove 803 should be in the filter element. 11 are arranged staggered in the length direction to ensure that when the outer frame 8 rotates one circle, the movement range of the two scrapers can cover the peripheral side of the outer circumference of the filter element 11 without leaving a dead angle.

Not only can the scraper bar not be able to scrape the filter element 11, but considering that the outer periphery of the filter element 11 of the existing filter is sleeved on the filter bottle body 7, the inner side of the scraper bar can be fitted to the filter element 11 and the outer side can be fitted. It is arranged on the filter bottle body 7, and when the drain valve 18 is rotated, the scraper strips scrape the outer circumference of the filter element 11 and the inner wall of the bottle body at the same time.

15 and 16, the inner side of the scraper is provided with an inner scraper 82, and the outer side of the scraper is provided with an outer scraper 81. The height of the inner scraper 82 and the outer scraper 81 depends on the scraper relative to the outer wall of the filter element 11. The gap between the filter bottle body 7 and the inner wall of the filter bottle body 7, the height of the two and the amount of interference with the corresponding structure can be equal or unequal, the above parameters can refer to the adhesion and accumulation of impurities in the recoil filter during filtration. Adjust the specific situation. For example, if the filter element 11 is more likely to accumulate impurities than the filter bottle body 7, the interference between the inner scraping ribs 82 and the outer wall of the filter element 11 can be greater than the interference between the outer scraping ribs 81 and the inner wall of the bottle body. quantity.

In order to improve the cleaning effect of the backwash filter, in addition to making improvements in the cleaning stage, the present invention also makes improvements in the filtration stage, mainly referring to the arrangement of a water separator 6 between the filter element 11 and the filter body 7 .

The wall surface of the water separator 6 has an oblique guide groove for forming a vortex in the filtered water passage. During the filtration process, when the raw water flows through the water separator 6, it is dispersed and guided by the oblique diversion groove, forming a vortex and generating centrifugal force, so that impurities are easily separated, so that the impurities will not stick to the filter screen or the bottle body, and the backwash effect is enhanced. . In addition, the water separator 6 is also rotatably connected to the upper end of the filter element 11. When the raw water hits the side of the oblique guide flow, the raw water will drive the water separator 6 to rotate 360°, increasing the centrifugal force to separate impurities.

On the basis of the foregoing embodiment, in order to better flush the filter element 11 and even the filter bottle body 7 , the pressurizing member 9 provided in this embodiment is rotatably connected to the filter element 11 , and the axis of any narrow hole 901 intersects with the filter element 11 . The diameter of , including but not limited to, the axis of the narrow hole 901 is perpendicular to the diameter of the filter element 11 , that is, parallel to the tangential direction of the filter element 11 .

The number of the narrow holes 901 can be specifically set according to the size and application of the filter element 11. For example, six narrow holes 901 can be set on the peripheral side of the pressurizing member 9, and every three narrow holes 901 are set as a group, along the pressurizing member 9. 9 are distributed at an axial interval; two sets of narrow holes 901 are respectively arranged on the left and right opposite sides of the pressurizing member 9 .

With the pressurizing member 9 provided with the above structure, when the water flow is sprayed, the reaction force will make the pressurizing member 9 rotate itself, so that the water sprayed from the narrow hole 901 flushes the filter element 11 and the filter bottle body 7 360° , to cover the peripheral side of the filter element 11 and the filter bottle body 7 to avoid the dead angle of the narrow hole 901, thereby improving the cleaning effect.

Further, the upper end of the filter element 11 is connected with a backwash frame 4 , and the water path conversion assembly includes a water path converter 5 sleeved in the filter element 11 and an elastic body 16 connected to the lower end of the water path converter 5 .

When the filter element 11 is in the filtering state, the upper end of the backwash frame 4 and the water circuit converter 5 are sealed, and water cannot directly enter the water purification area, that is, the interior of the filter element 11 without being filtered through the stainless steel filter screen.

When the filter element 11 is adjusted from the filtering state to the backwashing state, the drain valve 18 is opened, and the water circuit converter 5 moves downward under the action of water pressure and compresses the communication between the elastic body 16, the backwashing frame 4 and the inner cavity of the filter element 11. The cavity is exposed, and the water enters the interior of the water circuit converter 5 from the backwash frame 4, and then passes through the booster 9 and the filter element 11 in turn to realize backwashing; the water flowing out of the filter element 11 enters the drain valve 18 through the siphon hole 1503. During the process, a siphon effect is produced, and finally the water carrying impurities flows out from the drain valve 18 to complete the cleaning.

When the backwash state is adjusted to the filter state again, the drain valve 18 is closed, the elastic body 16 rebounds and drives the water circuit converter 5 to move upward, and the communication cavity between the backwash frame 4 and the inner cavity of the filter element 11 is blocked, thereby realizing The upper end of the backwash frame 4 and the water circuit converter 5 are sealed.

A spring may be used for the elastic body 16 . In order to avoid the failure of the spring due to repeated operation or excessive water pressure, the backwash filter provided by the present invention is provided with an inner frame 10 between the inner circumference of the filter element 11 and the outer circumference of the pressurizing member 9 , and the upper end of the inner frame 10 is sleeved. There is a first positioning plane 1001, and the water circuit converter 5 inside the pressurizing member 9 has a cooperative relationship with the first positioning plane 1001 when the backwash water circuit is connected, so as to realize the axial stop of the water circuit converter 5 and avoid the spring down Failure due to excessive pressure.

The inner frame 10 is provided with a first groove 1003 and a second groove 1004 on the peripheral side. The first groove 1003 and the second groove 1004 are respectively used to install O-rings, so as to realize the sealing of the inner frame 10 and the filter element 11 .

The inner frame 10 is threadedly assembled with the filter cover 13 installed on the lower end surface of the inner frame 10. Specifically, the inner frame 10 is provided with a first external thread 1002 on the peripheral side, and the filter cover 13 is provided with a mesh cover inner thread, and the two are screwed together. Afterwards, the filter element 11 sleeved on the outer periphery of the inner frame 10 is relatively fixed with the filter screen cover 13 to prevent the filter element 11 from moving.

A plurality of inner frame notches 1007 are provided in the first positioning plane 1001 of the inner frame 10 , and a second positioning plane 502 is provided on the outer peripheral side of the water channel converter 5 . During backwashing, the first positioning plane 1001 is in contact with the second positioning plane 502 on the water circuit converter 5 to block all the inner frame gaps 1007 and limit the lowest pressure position of the water circuit converter 5 . During filtration, the water circuit converter 5 moves upward, the second positioning plane 502 is separated from the first positioning plane 1001 , the inner frame gap 1007 is exposed, and the raw water can flow downward from the inner frame gap 1007 to the outer circumference of the inner frame 10 and the filter element 11 .

The inner frame 10 can also be provided with a plurality of bosses 1005 on the outer circumference of the first positioning plane 1001. The bosses 1005 are used to cooperate with the installation grooves of the filter bottle body 7 to realize the positioning of the inner frame 10 and the filter bottle body 7, avoiding The inner frame 10 floats up and down when the filter water channel and the backwash water channel are switched.

The bottom peripheral side of the inner frame 10 can also be provided with elastic snaps 1006 for snap-fit with the cover 12 installed on the lower end surface of the inner frame 10 . The outer circumference of 12 is engaged with the elastic buckle 1006, which is only used to limit the freedom of movement along the axial direction of the pressurizing member 9.

As for the cover 12 , its shape is adapted to the shape of the bottom of the pressurizing part 9 and is fixedly connected with the bottom of the pressurizing part 9 , for example, through the cover snap 1201 on the lower end of the cover 12 and the clip at the bottom end of the pressurizing part 9 Buckle notches 902 are connected.

During the backwashing process, the inner ring surface 1202 of the cover 12 is in contact with the outer wall of the water circuit converter 5 to prevent the water from flowing out from the lower part of the cover 12, so that the water flows out from the narrow hole 901 to concentrate the water. effect of water flow.

The cover rib 1203 on the upper end surface of the cover 12 is in contact with the lower end surface of the inner frame 10, so that the inner frame 10 is placed on the cover rib 1203 to achieve point-line contact, thereby reducing the pressure when the booster 9 rotates. The resistance can also assist the pressurizing member 9 to discharge water when the narrow hole 901 of the pressurizing member 9 is blocked, so as to avoid damage to the backwash filter.

For better technical effect, the water circuit converter 5 provided by the present invention includes a scroll rod for inserting into the pressurizing member 9 .

The vortex rod is a hollow straight rod structure, and its peripheral side is provided with a water hole 507. The water entering and leaving the pressurizing member 9 enters and exits the water channel converter 5 through the water hole 507 to ensure the smoothness of the filtration waterway and the smoothness of the backwash waterway.

The peripheral side of the vortex rod is also provided with a spiral rib 506 for realizing the water flow vortex in the backwashing water channel. The spiral rib 506 makes the water entering the pressurizing member 9 generate a vortex during the backwashing process, so that the pressurizing member 9 is more easily turn. Obviously, the direction of rotation of the spiral rib 506 is consistent with the inclination direction of the narrow hole 901 , which ensures that the rotational effect of the vortex water flow on the pressurizing member 9 and the rotation effect of the pressurizing member 9 caused by the narrow hole 901 are superimposed positively.

The above-mentioned water circuit converter 5 can be arranged in a funnel shape, and the outside of the bucket surface is provided with a converter convex rib 505, which is used to fit with the inner wall of the pressurizing member 9 during backwashing, and block the filtered water hole 903; A groove 501 and a second groove 503 are used to install an O-ring, which plays the role of sealing the gap between the water circuit converter 5 and the backwash frame 4 .

Further, the water channel conversion assembly further includes a piston 15 connected between the elastic body 16 and the water channel converter 5 . The upper end of the piston 15 is fixedly connected to the water circuit converter 5 , the peripheral side of the piston 15 is sealedly connected to the bottom end of the inner frame 10 , and the piston 15 has two siphon holes 1503 .

The piston 15 is provided with a piston inner thread 1501, which is used to connect with the second outer thread 504 of the water circuit converter 5. When the backwash state is converted into the filter state, the piston plane 1505 of the piston 15 is in contact with the elastic body 16. Under the force of , the piston 15 moves upwards, thereby driving the waterway converter 5 to move upwards to realize the conversion of the filter waterway and the backwash waterway.

The peripheral side of the piston 15 is provided with a first piston groove 1502 for installing O-rings respectively, so as to seal the gap between the inner frame 10 and the piston 15 and prevent water from flowing through the gap between the two. Specifically, during filtration, unfiltered water is prevented from entering the water purification area, which affects the filtering effect; during flushing, water is prevented from flowing through the gap between the inner frame 10 and the piston 15, and the backwash water pressure is reduced, thereby affecting the Backwash effect.

The peripheral side of the piston 15 is also provided with a second piston groove 1504, which is used to install the gasket 14 to seal the gap between the piston 15 and the outer frame 8, so as to avoid water from the gap between the two during backwashing. When the water flows out, the water is only discharged from the two symmetrically arranged siphon holes 1503 to achieve a siphon effect, thereby facilitating the removal of impurities to the outside of the backwash filter.

One end face of the piston 15 is provided with a cross rib 1506. The cross rib 1506 is used to realize the positioning and installation of the elastic body 16, so that the elastic body 16 always moves in the direction vertical to the direction of the bottle no matter which direction the elastic body 16 is subjected to. Therefore, the situation that the elastic body 16 cannot rebound due to the deformation of the elastic body 16 is avoided.

During normal filtration, the water pressure inside the bottle body 7 is basically the same. At this time, the elastic force of the elastic body 16 acts on the piston plane 1505 of the piston 15, so as to withstand the piston 15. Because the piston 15 is threaded with the water circuit converter 5, so The water circuit converter 5 is also supported by the backwash spring. At this time, the backwash filter is in a filtering state, as shown in FIG. 2 .

Rotate the handle of the ball valve 18, the water pressure acts on the piston 15, which drives the piston 15 to move downward, and the water circuit converter 5 connected to the piston 15 moves downward under the action of the water pressure until the first positioning plane 1001 on the inner frame 10 is reached. In contact with the second positioning plane 502 on the water circuit converter 5, and at the same time the top end of the spiral rib 506 contacts with the top surface of the pressurizing member 9, the water circuit converter 5 and the piston 15 stop moving downward. At this time, the part of the water channel originally closed at the top of the backwash frame 4 and the water circuit converter 5 is opened, and the water enters the water circuit converter 5 from the backwash frame 4 and the backwash net 3 arranged outside the backwash frame 4, and then flows through Flow inside and out to achieve backwashing. Finally, it is discharged through the two siphon holes 1503, the seal 17 and the drain valve 18, as shown in FIG. 3 .

The backwash filter provided by the present invention also includes a valve head 1 and a pressure net cover 2 and other structures. The backwash frame groove 401 of the backwash frame 4 is correspondingly connected with the buckle feet 201 of the pressure net cover 2, which plays a role in fixing the backwash. The role of flushing net 3.

There are four supporting feet 402 on the bottom peripheral side of the backwashing frame 4. After the backwashing frame 4 is installed, the four supporting feet 402 create a gap between the backwashing frame 4 and the inner frame 10, which is convenient for the circulation of raw water during filtration. .

The pressure mesh cover 2 is provided with a pressure mesh cover groove 202, and the pressure mesh cover groove 202 is used to install an O-ring, which plays the role of sealing the gap between the pressure mesh cover 2 and the valve head 1. The filtered water enters the water purification area, which affects the filtering effect; on the other hand, it prevents the water from flowing through the gap between the pressure mesh cover 2 and the valve head 1, reduces the water pressure of backwashing, and affects the backwashing effect.

The backwash filter provided by the present utility model has been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present utility model, some improvements and modifications can also be made to the present utility model, and these improvements and modifications also fall into the protection of the claims of the present utility model. within the range.

Claims (10)

1. A backflush filter, comprising:

a filter element (11);

the waterway conversion component is arranged in the filter element (11) and is used for realizing the conversion between a filtering waterway and a backwashing waterway; a pressurizing piece (9) is sleeved between the waterway conversion assembly and the filter element (11); the peripheral side of the pressurizing piece (9) is provided with a plurality of narrow holes (901) used for intensively spraying water flow on the inner wall of the filter element (11) in the backwashing water channel;

a drain valve (18) arranged below the filter element (11); a siphon hole (1503) for realizing siphon is connected with the drain valve (18).

2. The backflush filter according to claim 1, characterized in that the pressure intensifier (9) is connected in rotation to the filter element (11); the axis of any one of the slots (901) intersects the diameter of the filter element (11).

3. The backflush filter according to claim 2, characterized in that the upper end of the filter element (11) is connected with a backflush skeleton (4); the waterway conversion component comprises a waterway converter (5) sleeved in the filter element (11) and an elastic body (16) connected to the lower end of the waterway converter (5);

when the drain valve (18) is opened, the waterway converter (5) moves downwards under the action of water pressure and compresses the elastic body (16) to expose a communication cavity between the backwashing framework (4) and the inner cavity of the filter element (11); when the drain valve (18) is closed, the elastic body (16) rebounds and drives the waterway converter (5) to move upwards so as to block the communication cavity.

4. The backflushing filter according to claim 3, characterized in that the waterway converter (5) comprises a vortex rod to be inserted inside the plenum (9); and water passing holes (507) and spiral ribs (506) for realizing water flow vortex in the backwashing water channel are formed in the peripheral side of the vortex rod.

5. The backwash filter as claimed in claim 3, wherein an inner frame (10) is sleeved between the inner periphery of the filter element (11) and the outer periphery of the pressurizing member (9);

the first positioning plane (1001) at the upper end of the inner framework (10) is used for being attached to and supporting the waterway converter (5) in the backwashing waterway so as to realize axial stopping of the waterway converter (5).

6. The backflushing filter according to claim 5, wherein said waterway switch assembly further comprises a piston (15) connected between said elastomer (16) and said waterway switch (5); the upper end of piston (15) with water route converter (5) fixed connection, the week side of piston (15) with the bottom sealing connection of endoskeleton (10), piston (15) have two siphon-holes (1503).

7. The backflush filter of claim 5,

the bottom of the inner framework (10) is provided with an elastic buckle (1006), and the bottom of the pressurizing piece (9) is connected with a sealing cover (12);

the periphery of the cover (12) is clamped with the elastic buckle (1006); and a sealing cover convex rib (1203) on the upper end surface of the sealing cover (12) is attached to the bottom surface of the inner framework (10).

8. The backflush filter according to any one of claims 1 to 7, characterized in that the filter insert (11) is inserted into the filter body (7); a scraping strip is also arranged between the filter bottle body (7) and the filter element (11); the inner side and the outer side of the scraping strip are provided with scraping ribs used for respectively scraping the filter element (11) and the filter bottle body (7).

9. The backflush filter according to any one of claims 1 to 7, characterized in that the filter insert (11) is inserted into the filter body (7); a water separator (6) is arranged between the filter element (11) and the filter bottle body (7); the water separator (6) is rotatably connected to the upper end of the filter element (11), and the wall surface of the water separator (6) is provided with an oblique diversion trench used for enabling the filtering waterway to form a vortex.

10. The backflushing filter according to any one of claims 1 to 7, wherein the pressurizing member (9) has a plurality of water-filtering holes (903) on the top end peripheral side; the water filtering holes (903) are open to the inner cavity of the filter element (11) in the filtering waterway and are attached to and sealed with the outer wall of the waterway conversion component in the backwashing waterway.

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