CN207805167U - One kind spirally scraping fore filter - Google Patents

Abstract

A spiral type scraping pre-filter, including a shell and water inlet and water outlets arranged on both sides of the upper end of the shell, a filter cylinder is set inside the shell, and there is a distance between the filter cylinder and the inner wall of the shell. There are several uniformly distributed filter holes on the filter cylinder, and a layer of filter mesh is wrapped on the surface of the filter cylinder, and the filter mesh covers the filter holes. The upper part of the filter cylinder is provided with a number of backwash holes connected with its internal space. A scraper is provided on the inner wall, and the scraper is made of soft material; the width of the scraper is greater than the distance between the outer wall of the scraper and the outer wall of the filter; the top of the housing is provided with a stroke hole that communicates with the inner space of the housing. The stroke hole is provided with an internal thread. The spiral type scraping pre-filter of the utility model can realize the opening of the sewage outlet and the spiral type scraping at the same time only by turning the knob when flushing the sewage, and can use the spiral type scraping during the flushing process. Wash to clean up the dirt and impurities on the outer wall of the filter.

Description

A spiral type scraping pre-filter

technical field

The utility model relates to a pre-filter, in particular to a spiral type scraping pre-filter.

Background technique

The pre-filter is the first coarse filtration equipment for the water in the whole house, which can filter large particles such as sediment and rust in the tap water. It is generally installed at the front end of the pipeline. The water in the pipeline will first pass through the pre-filter. The water end enters the filter cylinder, and then is filtered by the filter cylinder, and the water flow will eventually flow out from the water outlet for use. During the filtering process of the filter cylinder, the filter on the filter cylinder will continue to contact with impurities. If things go on like this, the impurities will even cover the filter mesh opening of the filter cartridge, and the water flow cannot flow out of the filter cartridge at a large flow rate, resulting in a decrease in water pressure and even blockage of the filter cartridge. In order to ensure the normal use of the filter cartridge , the filter cylinder needs to be cleaned, and when the existing pre-filter needs to be cleaned, the filter cylinder is generally cleaned by backwashing, but there are some stubborn dirt attached to the outer wall of the filter, from the filter It is extremely difficult for the water flowing from the inside of the cylinder to wash away the outer wall of the filter screen, so that the filter screen cannot be cleaned. If you want to clean the filter screen tube thoroughly, you need to disassemble the filter screen tube from the pre-filter, but The cleaning method of the filter cartridge is extremely troublesome, which not only increases the workload of the user, but also reduces the cleaning efficiency.

The sewage outlet of the traditional pre-filter will be equipped with a valve to control the opening and closing of the sewage outlet. If the filter cartridge is flushed directly by water backwashing, the valve at the sewage outlet needs to be opened first, and the backwashing method is used for cleaning. The impurities that come out can be discharged from the sewage outlet, and when the pre-filter is switched from the normal filtering state to the flushing sewage state, it can be realized by turning the knob on the top of the pre-filter. Therefore, if the pre-filter needs to be backwashed To work, it is necessary to turn on the control switches such as knobs and valves at the same time. The existence of multiple control switches makes the process of flushing and blowing down the pre-filter more troublesome, and the workload of the users increases accordingly, and the conversion time is also prolonged. The cleaning efficiency of the pre-filter.

Contents of the invention

The technical problem to be solved by the utility model is to provide a spiral type scraping pre-filter, which can realize the opening of the sewage outlet and the spiral type scraping at the same time when performing backwashing, just by turning the knob. During the flushing and sewage discharge process, the dirt and impurities on the outer wall of the filter screen are cleaned by spiral scraping.

The technical solution adopted by the utility model to solve the problems of the technologies described above is:

The utility model discloses a spiral type scraping and washing pre-filter, which comprises a shell, water inlet and water outlet arranged on both sides of the upper end of the shell, a filter screen cylinder is set inside the shell, and the filter screen cylinder and the inner wall of the shell There is a gap between them, the filter cylinder is provided with a number of evenly distributed filter holes, the surface of the filter cylinder is wrapped with a layer of filter mesh, the filter mesh covers the filter holes, and the upper part of the filter cylinder is provided with a number of backwash holes connected with its internal space , characterized in that: the inner wall of the housing is provided with a scraper, which is made of soft material; the width of the scraper is greater than the distance between the outer wall of the scraper and the outer wall of the filter; the top of the housing is provided with a The internal space is connected with the stroke hole, and the stroke hole is provided with an internal thread; the center of the top of the filter cylinder is provided with a valve stem; the outer wall of the lower part of the valve stem is provided with an external thread that Pass through the stroke hole and connect with a knob; there is an opening under the filter cylinder, and a sewage plug is screwed on the opening; the lower surface of the housing is provided with a sewage outlet connected to its internal space; the sewage plug Seal and block the drain outlet.

The valve stem and the knob are fixed by screws.

A joint is provided at the sewage outlet; a protective cover is provided on the outer ring of the joint, and an installation opening is opened on the bottom surface of the protection cover, and the inner diameter of the installation opening is greater than the outer diameter of the joint; the length of the protective cover is greater than the length of the joint.

A clasp is provided on the outer wall of the upper part of the filter cylinder; a limit step is formed between the outer wall of the filter cylinder and the sewage plug; the scraper is located between the clasp and the limit step; the scraper and the clamp There are movable distances between the ring and the limiting steps.

The beneficial effects of the utility model are:

Compared with the prior art, the spiral type scraping pre-filter adopting the structure of the utility model can scrape the dirt and impurities on the outer wall of the filter screen through the scraper blade made of soft material during the backwashing process, and as the filter In the process of moving up and down a few turns of the screen cylinder, the outer wall of the filter screen can be completely scraped and cleaned, and the dirt and impurities on the outer wall of the filter screen can be completely removed. Make the scraper scrape the outer wall of the filter, and make the backwash hole opposite to the water outlet, convert the filtering state of the pre-filter to the flushing and sewage state, and open the sewage outlet at the same time, without switching to the flushing and sewage state Then open the valve at the sewage outlet to realize the effect of one switch controlling multiple parts at the same time, which can effectively simplify the structure of the pre-filter, reduce the production cost, and effectively reduce the operation difficulty of the pre-filter and improve the efficiency of the pre-filter. operational efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model spiral scraping pre-filter;

Fig. 2 is a partial structural schematic diagram of the upper part of the spiral scraping pre-filter of the utility model;

Fig. 3 is a partial structural schematic diagram of the lower part of the spiral scraping pre-filter of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

Please refer to Fig. 1 to Fig. 3, the utility model provides a kind of spiral scraping pre-filter, which comprises a shell 1 and water inlet 2 and water outlet 3 arranged on both sides of the upper end of the shell 1, inside the shell 1 A filter cylinder 4 is erected, and there is a distance between the filter cylinder 4 and the inner wall of the housing 1. A number of evenly distributed filter holes are arranged on the filter cylinder 4. The surface of the filter cylinder 4 is wrapped with a layer of filter net 5, and the filter net 5 Cover the filter holes, and the upper part of the filter cylinder 4 is provided with a number of backwash holes 6 connected with its internal space. The inner wall of the housing 1 is provided with a scraper 7, which is made of soft material; the width of the scraper 7 is Greater than the distance between the outer wall of the scraper 7 and the outer wall of the filter screen 5; the top of the housing 1 is provided with a stroke hole 8 that communicates with the inner space of the housing 1, and an internal thread 9 is provided in the stroke hole 8; the filter screen A valve stem 10 is provided at the center of the top of the barrel 4; the outer wall of the lower part of the valve stem 10 is provided with an external thread 11 screwed with the internal thread 9, and the upper part of the valve stem 10 passes through the stroke hole 8 and is connected with a knob 12; the filter There is an opening 13 under the mesh cylinder 4, and a sewage discharge plug 14 is screwed at the opening 13; the lower surface of the housing 1 is provided with a sewage discharge port 15 connected with its internal space; the sewage discharge plug 14 seals the sewage discharge port 15 clogged.

The valve stem 10 and the knob 12 are fixed by screws 16 .

The sewage outlet 15 is provided with a joint 17; the outer ring of the joint 17 is provided with a protective cover 18, and the bottom surface of the protective cover 18 has an installation opening 19, and the inner diameter of the installation opening 19 is greater than the outer diameter of the joint 17; the length of the protective cover 18 is greater than Joint 17 length.

A clasp 20 is provided on the outer wall of the upper part of the filter cylinder 4; a limit step 21 is formed between the outer wall of the filter cylinder 4 and the sewage plug 14; the scraper 7 is located between the clasp 20 and the limit step 21 There is a movable distance 22 between the scraper 7 and the snap ring 20 and the limiting step 21 .

The using method of the present utility model is as follows:

Before using the pre-filter, first install the pre-filter on the pipeline through the water inlet 2 and the water outlet 3. At this time, the backwash hole 6 of the pre-filter is blocked by the inner wall of the housing 1. When the water flow from the inlet After the water end 2 flows into the housing 1, the water flow will enter the filter cylinder 4 through the inlet on the upper end of the filter cylinder 4, and finally the water flow in the filter cylinder 4 will flow into the housing 1 through the filter net 5 In the space, once the water flows through the filter 5, the filter 5 will have a filtering effect, and the sewage plug 14 will block the sewage outlet 15. As the water continues to fill the inner space of the housing 1, the water will eventually flow from the water outlet 3 Outflow, into the corresponding pipeline for use.

When the pre-filter needs to be backwashed to clean the filter cartridge, the user can turn the knob 12. Since the knob 12 is connected with the valve stem 10, when the knob 12 is turned, the valve stem 10 will rotate accordingly. , and the external thread 11 on the lower part of the valve stem 10 is screwed with the internal thread 9 on the inner wall of the stroke hole 8, the valve stem 10 will move up and down along the track of the internal and external thread when rotating, during the up and down displacement process of the valve stem 10, the filter screen The cylinder 4 moves up and down accordingly. When the user controls the filter cylinder 4 to move upward through the knob 12, the sewage plug 14 screwed under the filter cylinder 4 moves upward accordingly, and the sewage plug 14 no longer closes the sewage outlet 15. Blockage and sealing, the sewage outlet 15 and the internal space of the housing 1 are in a state of penetration, and as the filter cylinder moves upward, the inlet at the upper end of the filter cylinder is staggered from the water inlet end, and the water inlet 2 cannot go into the filter cylinder 4 When water enters, the backwash hole 6 moves to the position opposite to the water outlet 3, and the water in the pipeline connected to the water outlet 3 recoils into the water outlet 3, and enters the filter cartridge through the backwash hole 6 4, as the water flow continuously enters the filter cylinder 4, the water pressure of the water itself will continuously wash the inner wall of the filter cylinder 4, and the impurities washed out will be taken out to the filter cylinder through the mesh opening of the filter mesh 5 4, and the water flow will also wash away the impurities in the 5 mesh ports of the filter screen in the process of passing through the 5 mesh ports of the filter screen.

During the rotation of the filter cylinder 4, since the scraper 7 is fixed, the width of the scraper 7 is greater than the distance between the outer wall of the scraper 7 and the outer wall of the filter screen 5, so the scraper 7 can fully contact with the outer wall of the filter screen 5 , with the centrifugal force generated by the unscrewing of the filter cylinder 4, the scraper 7 in contact with it will form a reaction force. Under the action of the reaction force, the scraping force of the scraper 7 can be increased, thereby improving the cleaning quality. When scraping When the sheet 7 continuously scrapes the surface of the filter screen 5, the scraper 7 will scrape off the dirt and impurities attached to the outer wall of the filter screen 5, so that the fallen dirt and impurities will also be mixed into the water flow, and the scraper 7 is soft. Material, the scraper 7 will not damage the outer wall of the filter screen 5 while scraping and washing the outer wall of the filter screen 5. In the case of its own softness, the scraper 7 will be deformed, so that the scraper 7 and the outer wall of the filter screen 5 will not be damaged. The contact between the line and the surface is converted from the contact between the surface and the surface, so that the scraping range is wider and the scraping efficiency is higher. Rotating the filter cylinder 4 once can make the outer wall of the filter 5 wait until it is completely cleaned. The personnel only need to turn the filter screen cylinder 4 up and down several times through the knob 12 to completely clean up the dirt and impurities on the outer wall of the filter screen 5. When the sewage outlet 15 is opened, the dirt and impurities mixed in the water flow will be removed. It is discharged to the outside through the sewage outlet 15, and enters the filter screen cylinder 4 continuously along with the water flow, and finally all the dirt and impurities can be discharged, so that the pre-filter is thoroughly cleaned.

To sum up, it can be known that the utility model can scrape the dirt and impurities on the outer wall of the filter screen 5 through the scraper 7 which is a soft material in the backwashing process. In the process of moving several circles, the outer wall of the filter screen 5 can be completely scraped and cleaned, and the dirt and impurities on the outer wall of the filter screen 5 can be completely removed. In the process of moving the filter screen cylinder 4 upwards, not only can the scraper blade 7 pair filter The outer wall of the net 5 is scraped and cleaned, and the backwash hole 6 is opposite to the water outlet 3, the filtering state of the pre-filter is converted into the flushing and sewage discharge state, and the sewage outlet 15 can be opened at the same time, without the need to switch to the flushing and sewage discharge state. Then open the valve at the sewage outlet 15 to realize the effect of one switch controlling multiple parts at the same time, which can effectively simplify the structure of the pre-filter, reduce the production cost, and effectively reduce the difficulty of pre-filter operation and improve the efficiency of the pre-filter. operational efficiency.

The valve stem 10 and the knob 12 are fixed by screws 16 to facilitate disassembly between the valve stem 10 and the knob 12. If the knob 12 is damaged, the knob 12 can be replaced quickly.

A joint 17 is provided at the sewage outlet 15. The existence of the joint 17 can quickly realize the connection between the sewage outlet 15 and the sewage pipeline, so that the sewage can be discharged to the actual required position through the sewage pipeline, and the outer ring of the joint 17 is provided with Protective cover, the bottom surface of the protective cover 18 has an installation port 19, the inner diameter of the installation port 19 is larger than the outer diameter of the joint 17, the length of the protective cover 18 is greater than the length of the joint 17, the existence of the protective cover 18 can make the connection between the joint 17 and the sewage pipeline Covering, so that the connection position between the joint 17 and the sewage pipeline is protected, avoiding the situation that the user or other things accidentally touch the connection position and cause the sewage pipeline to fall off.

The outer wall of the upper part of the filter cylinder 4 is provided with a snap ring 20, and a limit step 21 is formed between the outer wall of the filter cartridge 4 and the sewage plug 14, and the scraper 7 is located between the snap ring 20 and the limit step 21. Between the ring 20 and the limit step 21 there is a movable distance 22, the existence of the movable distance 22 can ensure the up and down movement of the filter cylinder 4, and the snap ring 20 and the limit step 21 can play the effect of the upper and lower limit, avoiding the use of When the personnel rotate too many times during scraping and washing, the internal and external threads are detached. When the user moves the filter cylinder 4 up by a certain distance through the knob 12, the lower edge of the scraper 7 will come into contact with the upper surface of the limit step 21. , at this time, the user can clearly feel the resistance from the knob 12, and then the user can turn the filter cylinder down through the knob. The personnel can also clearly feel the resistance, and if the user wants to scrape and wash, the filter cylinder can continue to be moved upwards.

Claims (4)

1. A spiral type scraping pre-filter, including a housing and water inlet and outlet ports located on both sides of the upper end of the housing, a filter cylinder is installed inside the housing, and there is a filter cylinder between the filter cylinder and the inner wall of the housing. spacing, the filter cylinder is provided with a number of evenly distributed filter holes, the surface of the filter cylinder is wrapped with a layer of filter mesh, the filter mesh covers the filter holes, and the upper part of the filter cylinder is provided with a number of backwash holes connected with the internal space. It is characterized in that: a scraper is provided on the inner wall of the housing, and the scraper is made of soft material; the width of the scraper is greater than the distance between the outer wall of the scraper and the outer wall of the filter; the top of the housing is provided with a The stroke hole is connected with each other, and the stroke hole is provided with an internal thread; the center of the top of the filter cylinder is provided with a valve stem; the outer wall of the lower part of the valve stem is provided with an external thread that is screwed with the internal thread, and the upper part of the valve stem passes through The stroke hole is connected with a knob; there is an opening under the filter cylinder, and a sewage plug is screwed on the opening; the lower surface of the shell is provided with a sewage outlet connected to its internal space; the sewage plug will discharge the sewage The mouth seal is clogged. 2. A spiral type scraping pre-filter according to claim 1, characterized in that: the valve stem and the knob are fixed by screws. 3. A spiral type scraping pre-filter according to claim 1, characterized in that: a joint is provided at the sewage outlet; a protective cover is provided on the outer ring of the joint, and an installation opening is opened on the bottom surface of the protective cover , the inner diameter of the installation port is greater than the outer diameter of the joint; the length of the protective cover is greater than the length of the joint. 4. A spiral type scraping pre-filter according to claim 1, characterized in that: a snap ring is provided on the outer wall of the upper part of the filter cylinder; a snap ring is formed between the outer wall of the filter cylinder and the sewage plug. The limit step; the scraper is located between the snap ring and the limit step; there is a movable distance between the scraper, the snap ring and the limit step.