CN215352294U - Leading filter of water purification back flush - Google Patents

Abstract

The utility model provides a water purification backwashing prefilter, wherein two side surfaces of an outer framework are provided with grooves, silica gel scraping strips are arranged on the grooves, an inner framework is arranged in the outer framework, a filter screen is arranged outside the inner framework, the silica gel scraping strips extend inwards and can be contacted with the filter screen, the upper end of the inner framework is provided with a water path conversion piece, an O-shaped ring is arranged on the water path conversion piece, a backwashing framework is also arranged on the water path conversion piece, the lower end of the inner framework is provided with a piston, a gasket for sealing is arranged between the piston and the inner framework, and a backwashing spring is also arranged in the piston. The outer framework is provided with a groove and is provided with a silica gel scraping strip, and when the outer framework is in a back washing state, the outer framework rotates to drive the silica gel scraping blade to scrape and wash the surfaces of the bottle body and the filter screen, so that garbage is prevented from being attached to the bottle body and the filter screen, and the excellent filtering performance is always kept.

Description

Leading filter of water purification back flush

Technical Field

The utility model belongs to the technical field of filters, and relates to a pre-filter for water purification and backwashing.

Background

The pre-filter is the first coarse filter for the whole water, and can filter silt, rust and large particles in tap water. Usually, the water meter is arranged behind a water inlet pipeline water meter so as to ensure that a large amount of precipitated impurities generated in a pipe network cannot cause harm to a human body and play an active role in protecting hidden laying pipelines, taps, electric appliances and the like. In the prior art, the method has the defects that,

1. the pre-filter is positively washed, the surface of the filter screen is only washed by water flow, and dirt attached to the filter screen is difficult to wash away;

2. the siphon prefilter has a dirt suction port which is close to the filter screen, otherwise, the negative pressure suction force is weak, the effect is poor, and granular dirt is easy to accumulate in the bottle body;

3. the backwashing front filter is easy to cause the dirty objects to be accumulated on the backwashing aisle due to improper operation, so that blockage is caused and the backwashing function is lost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, and provides a water-purifying backwashing prefilter, wherein a groove is formed in an outer framework, a silica gel scraping strip is arranged on the outer framework, and the outer framework rotates to drive the silica gel scraping strip in a backwashing state, so that the surfaces of a bottle body and a filter screen can be scraped, garbage is prevented from being attached to the bottle body and the filter screen, and excellent filtering performance is always kept.

The purpose of the utility model can be realized by the following technical scheme: a pre-filter for water purification and back flushing comprises a drainage ball valve, a bottle body, a sealing element and an outer framework, and is characterized in that the sealing element is arranged at the lower end of the bottle body, the drainage ball valve is arranged at the lower end of the sealing element, the upper end of the sealing element is clamped with the outer framework, the lower end of the sealing element is clamped with the drainage ball valve, two side faces of the outer framework are provided with grooves, silica gel scraping strips are arranged on the grooves, an inner framework is arranged in the outer framework, a filter screen is arranged outside the inner framework, the silica gel scraping strips extend inwards and can be contacted with the filter screen, a water path conversion element is arranged at the upper end of the inner framework, an O-shaped ring is arranged on the water path conversion element, a back flushing framework is also arranged on the water path conversion element, a piston is arranged at the lower end of the inner framework, a gasket for sealing is arranged between the piston and the inner framework, a back flushing spring is also arranged inside the piston, the upper end of the piston can be in threaded connection with the water path conversion element and can drive the water path conversion element to move upwards, the inner framework is also internally provided with a pressurizing piece, and the side surface of the waterway conversion piece is an inclined surface and can be contacted with the top surface of the pressurizing piece.

When the pre-filter is used for normal filtering, the water pressure at each position in the bottle body is basically consistent, at the moment, the elastic force of the back washing spring acts on the piston so as to prop against the piston, the piston is in threaded connection with the waterway conversion piece so as to be propped against by the back washing spring, and meanwhile, an O-shaped ring on the waterway conversion piece seals the space between the back washing framework and the waterway conversion piece, so that water cannot directly enter a water purification area under the condition that the water is not filtered by the filter screen;

when the inclined surface on the waterway conversion piece is contacted with the top surface of the pressurizing piece, the waterway conversion piece and the piston stop moving downwards, the backwashing framework is provided with an unsealed section, and water enters the inside of the waterway conversion piece from the backwashing framework and flows from inside to outside, thereby achieving the backwashing effect. Finally, the water is discharged by the piston, the sealing part and the drainage ball valve, after the back washing is finished, the drainage ball valve is rotated, the drainage ball valve is closed, and the back washing spring rebounds to drive the piston to jack the waterway conversion part and change the waterway conversion part back to a normal filtering state;

when the filter is in a back flushing state, the outer framework can rotate along with water flow, the silica gel scraping blade acts on the filter screen and the filter body, and when the filter rotates for a circle, the whole circle of impurities on the filter screen and the bottle body can be hung, so that garbage is prevented from being attached to the filter screen and the bottle body, and the excellent filtering performance is always kept.

Furthermore, the upper end and the lower end of the outer framework are provided with grooves, and sealing rings are arranged in the grooves.

Furthermore, a water separator is arranged between the outer framework and the inner framework, and a guide vane is arranged on the water separator. The water separator plays a role in water separation and diversion, and can enhance the back washing effect.

Furthermore, the guide vane on the water separator is obliquely arranged. The guide vane device arranged obliquely has the function of oblique flow guiding, so that the back washing effect is further enhanced.

Compared with the prior art, the water purification back flush prefilter has the advantages that:

1. the outer framework is provided with a groove and is provided with a silica gel scraping strip, and when the outer framework is in a back washing state, the outer framework rotates to drive the silica gel scraping blade to scrape and wash the surfaces of the bottle body and the filter screen, so that garbage is prevented from being attached to the bottle body and the filter screen, and the excellent filtering performance is always kept.

2. The water separator plays a role in water separation and diversion, and can enhance the back washing effect. The guide vane device arranged obliquely has the function of oblique flow guiding, so that the back washing effect is further enhanced.

Drawings

Fig. 1 is a schematic structural view of a pre-filter for clean water backwash.

Fig. 2 is a schematic view of an exoskeleton.

Fig. 3 is a schematic view of a silicone wiper strip.

In the figure, 1, a framework is back-washed; 2. a waterway conversion member; 3. a water separator; 4. a bottle body; 5. an outer skeleton; 6. a pressure increasing member; 7. an inner skeleton; 8. a filter screen; 9. a gasket; 10. a piston; 11. a back-flushing spring; 12. a seal member; 13. a drain ball valve; 14. a groove; 15. and (5) scraping a silica gel strip.

Detailed Description

The following is a detailed description of the embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-3, a pre-filter for water purification and back flushing comprises a drain ball valve 13, a bottle body 4, a sealing element 12, and an outer skeleton 5, wherein the sealing element 12 is installed at the lower end of the bottle body 4, the drain ball valve 13 is installed at the lower end of the sealing element 12, the upper end of the sealing element 12 is connected with the outer skeleton 5 in a clamping manner, the lower end of the sealing element 12 is connected with the drain ball valve 13 in a clamping manner, grooves 14 are formed in both side surfaces of the outer skeleton 5, silica gel scraping strips 15 are installed on the grooves 14, an inner skeleton 7 is installed in the outer skeleton 5, a filter screen 8 is installed outside the inner skeleton 7, the silica gel scraping strips 15 extend inwards and can contact with the filter screen 8, a water path conversion element 2 is installed at the upper end of the inner skeleton 7, an O-shaped ring is installed on the water path conversion element 2, a back flushing skeleton 1 is also installed on the water path conversion element, a piston 10 is installed at the lower end of the inner skeleton 7, a gasket 9 for sealing is installed between the piston 10 and the inner skeleton 7, a back washing spring 11 is further arranged inside the piston 10, the upper end of the piston 10 can be in threaded connection with the waterway conversion member 2 and can drive the waterway conversion member 2 to move upwards, a pressurizing member 6 is further arranged inside the inner framework 7, and the side surface of the waterway conversion member 2 is an inclined surface and can be in contact with the top surface of the pressurizing member 6.

The upper end and the lower end of the outer framework 5 are provided with grooves, and sealing rings are arranged in the grooves.

And a water separator 3 is also arranged between the outer framework 5 and the inner framework 7, and a guide vane is arranged on the water separator 3. The water separator 3 plays a role in separating water and guiding flow, and can enhance the back washing effect.

The guide vane on the water separator 3 is obliquely arranged. The guide vane device arranged obliquely has the function of oblique flow guiding, so that the back washing effect is further enhanced.

The outer framework 5 is provided with a groove 14 and is provided with a silica gel scraping strip 15, and when the outer framework 5 is in a back washing state, the silica gel scraping strip is driven by the rotation of the outer framework 5, so that the surfaces of the bottle body 4 and the filter screen 8 can be scraped and washed, the garbage is prevented from being attached to the bottle body 4 and the filter screen 8, and the excellent filtering performance is always kept.

When the pre-filter is used for normal filtering, the water pressure at each position inside the bottle body 4 is basically consistent, at this time, the elastic force of the back washing spring 11 acts on the piston 10 to prop against the piston 10, and the piston 10 is in threaded connection with the water channel conversion piece 2 and is propped against by the back washing spring 11, and meanwhile, the O-shaped ring on the water channel conversion piece 2 seals the space between the back washing framework 1 and the water channel conversion piece 2, so that water cannot directly enter a water purification area under the condition that the water is not filtered by the filter screen 8;

in a backwashing state, the drain ball valve 13 is rotated anticlockwise, the water pressure acting force is on the water path conversion piece 2, the water path conversion piece 2 moves downwards under the action of water pressure, and the piston 10 is in threaded connection with the water path conversion piece 2, so that the water path conversion piece 2 drives the piston 10 to move downwards together, when the inclined surface on the water path conversion piece 2 is contacted with the top surface of the pressurizing piece 6, the water path conversion piece 2 and the piston 10 stop moving downwards, the backwashing framework 1 is provided with an unsealed section, water enters the inside of the water path conversion piece 2 from the backwashing framework 1 and flows outwards from inside, and a backwashing effect is achieved. Finally, the water is discharged by the piston 10 through the sealing part 12 and the drainage ball valve 13, after the back washing is finished, the drainage ball valve 13 is rotated, the drainage ball valve 13 is closed, the back washing spring 11 rebounds to drive the piston 10 to jack the waterway conversion part 2, and the waterway conversion part returns to a normal filtering state;

when the filter is in a back flushing state, the outer framework 5 can rotate along with water flow, the silica gel scraping blade acts on the filter screen 8 and the bottle body 4, and when the filter rotates for a circle, the whole circle of impurities on the bottle body 4 and the filter screen 8 can be hung off, so that garbage is prevented from being attached to the bottle body 4 and the filter screen 8, and the excellent filtering performance is always kept.

Claims (4)

1. A pre-filter for water purification and back flushing comprises a drainage ball valve, a bottle body, a sealing element and an outer framework, and is characterized in that the sealing element is arranged at the lower end of the bottle body, the drainage ball valve is arranged at the lower end of the sealing element, the upper end of the sealing element is clamped with the outer framework, the lower end of the sealing element is clamped with the drainage ball valve, two side faces of the outer framework are provided with grooves, silica gel scraping strips are arranged on the grooves, an inner framework is arranged in the outer framework, a filter screen is arranged outside the inner framework, the silica gel scraping strips extend inwards and can be contacted with the filter screen, a water path conversion element is arranged at the upper end of the inner framework, an O-shaped ring is arranged on the water path conversion element, a back flushing framework is also arranged on the water path conversion element, a piston is arranged at the lower end of the inner framework, a gasket for sealing is arranged between the piston and the inner framework, a back flushing spring is also arranged inside the piston, the upper end of the piston can be in threaded connection with the water path conversion element and can drive the water path conversion element to move upwards, the inner framework is also internally provided with a pressurizing piece, and the side surface of the waterway conversion piece is an inclined surface and can be contacted with the top surface of the pressurizing piece.

2. The prefilter of claim 1 wherein said outer frame has grooves in its upper and lower ends, said grooves having sealing rings.

3. The prefilter of claim 1 wherein a water separator is further provided between said outer frame and said inner frame, and guide vanes are provided on said water separator.

4. The prefilter of claim 3 wherein said guide vanes on said water knockout drum are inclined.

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