CN203408531U

CN203408531U - Self-compression back washing filtering device

Info

Publication number: CN203408531U
Application number: CN201320524875.2U
Authority: CN
Inventors: 赵燕京
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-27
Filing date: 2013-08-27
Publication date: 2014-01-29
Anticipated expiration: 2023-08-27

Abstract

The utility model discloses a self-compression back washing filtering device. The self-compression back washing filtering device comprises a raw water inlet, a purified water outlet and a filtering cavity body arranged between the raw water inlet and the purified water outlet; the filtering cavity body is internally provided with a filtering element with a purification function and a sewage exhaust opening; an air storage chamber the position of which is lower than that of the purified water outlet is arranged between the filtering cavity body and the purified water outlet. According to the self-compression back washing filtering device disclosed by the utility model, the air storage chamber is positioned below the purified water outlet; purified water entering the air storage chamber compresses air in the air storage chamber from top to bottom; air in the air storage chamber can be furthest compressed, so that purified water has great back washing force and washing water quantity in back washing, and can wash off impurities on the filtering element smoothly.

Description

A kind of self-pressure back-flushing filtering device

Technical field

The utility model relates to a kind of filter, specifically relates to a kind of self-pressure back-flushing filtering device.

Background technology

In daily life; the clean water produce, life being used all adopts various filters to carry out purified treatment to water; filter is to carry indispensable a kind of device on waterpipe; conventionally be arranged on the entrance point of pressure-reducing valve, relief valve, Valve for keeping constant water level or miscellaneous equipment; be used for eliminating the impurity in water, to protect the normal use of valve and equipment.When fluid enters after the filter cylinder that is equipped with certain specification filter core, its impurity is blocked, and clean clean water is discharged by filter outlet.Therefore, filter in use for some time, is attached to after impurity on filter core, need to be through continuing use after cleaning, and artificially cleaning not only can be shortened filter core service life, also can produce secondary pollution.At present, be mainly to utilize the hydraulic pressure of the reverse flow of water to realize the backwash of filter core, but because water is incompressible material, do not exist the possibility that filter core is cleaned in larger recoil strength and recoil, be difficult to reach backwash truly.

In order to address the above problem, Chinese patent literature CN201618460U discloses a kind of Pneumatic backwashing filter, comprises filter water tank, filter core, raw water inlet, impurity discharge outlet, filter water purification delivery port, air storing cavity, air storing cavity water purification water inlet, air storing cavity water purification delivery port.It is the Pneumatic backwashing filter described in above-mentioned patent documentation, during filtration, raw water inlet access water supply pipe, running water enters filter water tank to filter core, see through filter core filter opening and enter filter water tank, impurity is blocked in filter core or is blocked in filter opening, and water purification inflow filter water tank flows into air storing cavity from the air storing cavity water purification water inlet of air storing cavity bottom again; Air storing cavity water purification delivery port is also in the bottom of air storing cavity, and the gas in air storing cavity is compressed, until equate with tap water pressure; While needing water purification, open the air storing cavity water purification delivery port of air storing cavity, water purification just flows out air storing cavity; During backwash, close air storing cavity water purification delivery port, open impurity discharge outlet, the impurity in filter core is along with current are discharged, because raw water inlet bore is less than impurity discharge outlet bore, therefore the pressure in filter core fails to supplement and produce pressure reduction in time, now, the gas pressure in air storing cavity is greater than the pressure in filter core, therefore the water purification in air storing cavity is recoiled to filter core, see through filter core filter opening and rush or extrude the impurity stopping up in filter opening, impurity is discharged with impurity discharge outlet, thereby realizes the effect of backwashing filter core.

But the Pneumatic backwashing filter described in above-mentioned patent documentation has the following disadvantages: in this Pneumatic backwashing filter, the position of air storing cavity is higher than the position of air storing cavity water purification water inlet and air storing cavity water purification delivery port, enter the bottom-up extruding air of water purification in air storing cavity, but the center of gravity of water purification is positioned at below, therefore can not can not realize the compression of going up largely by air, when backwash, compressed air is less to the thrust of water, make when backwashing filter core, the impulse force of water is little, thereby filter core can not be rinsed well.

Utility model content

For this reason, technical problem to be solved in the utility model is backwash filter of the prior art, and the impulse force of the backwash of water is less, and then a kind of large self-pressure back-flushing filtering device of impulse force of backwash is provided.

For solving the problems of the technologies described above, a kind of self-pressure back-flushing filtering device of the present utility model, it comprises original water inlet, pure water inlet, and be located at the filtration cavity between described original water inlet and described pure water inlet, in described filtration cavity, be provided with filter core and the blowdown outlet with purification function, between described filtration cavity and described pure water inlet, be provided with position lower than the air storage chamber of described pure water inlet.

In described air storage chamber, be also provided with for isolating the expanded film of clean water and air.

On described filtration cavity, also form water inlet and delivery port, described water inlet communicates with described original water inlet is vertical, and described filter core is " U " type, and communicates with described delivery port, described delivery port is connected with described air storage chamber, and the lower end of described filter core cavity is located in described blowdown outlet.

Described filtration cavity is made as a plurality of, and the last described delivery port of adjacent two described filtration cavitys is connected with water inlet described in rear.

Described filtration cavity is made as three.

Described expanded film is made by having flexible silica gel.

Technique scheme of the present utility model has the following advantages compared to existing technology:

(1) in the utility model, between described filtration cavity and described pure water inlet, be provided with position lower than the air storage chamber of described pure water inlet, in this device, described air storage chamber is positioned at the below of described pure water inlet, enter the water purification of described air storage chamber by upper air in air storage chamber described in lower compression, the air in described air storage chamber can be compressed to the full extent, like this when backwash, water purification has larger backwash power, can smoothly the impurity on described filter core be rinsed out.

(2) in the utility model, in described air storage chamber, be also provided with for isolating the expanded film of clean water and air, described expanded film is made by having flexible silica gel, when the air in described air storage chamber is compressed, there is strain to a certain extent downwards in described expanded film, when backwash, described expanded film also resets from top to bottom, makes water purification can have larger recoil strength.

(3) in the utility model, described filtration cavity is made as three, and the last described delivery port of adjacent two described filtration cavitys is connected with water inlet described in rear, thereby has formed Multistage filtering device, makes the degree of purification of water purification obtain guarantee.

Accompanying drawing explanation

For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below

Fig. 1 is the schematic diagram of self-pressure back-flushing filtering device described in the utility model while filtering;

Fig. 2 is the schematic diagram of self-pressure back-flushing filtering device described in the utility model while carrying out backwash;

In figure, Reference numeral is expressed as: 1-original water inlet; 2-pure water inlet; 3-filters cavity; 31-filter core; 32-blowdown outlet; 33-water inlet; 34-delivery port; 4-air storage chamber; 41-expanded film.

The specific embodiment

Below with reference to accompanying drawing, use following examples to be further elaborated the utility model.

As shown in Figure 1, a kind of self-pressure back-flushing filtering device described in the present embodiment, it comprises original water inlet 1, pure water inlet 2, and be located at the filtration cavity 3 between described original water inlet 1 and described pure water inlet 2, in described filtration cavity 3, be provided with filter core 31 and the blowdown outlet 32 with purification function, between described filtration cavity 3 and described pure water inlet 2, be provided with position lower than the air storage chamber 4 of described pure water inlet 2.In the present embodiment, described air storage chamber 4 is positioned at the below of described pure water inlet 2, enter the water purification of described air storage chamber 4 by upper air in air storage chamber described in lower compression 4, air in described air storage chamber 4 can be compressed to the full extent, like this when backwash, water purification has larger backwash power, can smoothly the impurity on described filter core 31 be rinsed out.

Recoil strength when increasing backwash, is also provided with in described air storage chamber 4 for isolating the expanded film 41 of clean water and air; As preferred embodiment, described expanded film 41 just has and has flexible silica gel and make, and can certainly adopt other to have flexible withstand voltage plastic material and make; When the air in described air storage chamber 4 is compressed like this, there is strain to a certain extent downwards in described expanded film 41, and when backwash, described expanded film 41 also resets from top to bottom, thereby makes water purification can have larger recoil strength.

On the basis of above-described embodiment, in the present embodiment, on described filtration cavity 3, also form water inlet 33 and delivery port 34, described water inlet 33 and vertical the communicating of described original water inlet 1, described filter core 31 is " U " type, and communicate with described delivery port 34, described delivery port 34 is connected with described air storage chamber 4, and the lower end of described filter core 31 cavitys is located in described blowdown outlet 32.In the present embodiment, need the former water filtering to enter described filtration cavity 3 inside by described original water inlet 1 and described water inlet 33, then penetrate in described filter core 31, be that former water is become water purification by described filter core 31 filtration, purifications, water purification in described filter core 31 is discharged by described delivery port 34, and then enter in described air storage chamber 4, and the gas in described air storage chamber 4 is compressed, finally by the pure water inlet 2 being connected with described air storage chamber 4, discharged.

Further, in the present embodiment, in order to strengthen the purification function of this self-pressure back-flushing filtering device, described filtration cavity 3 can be made as a plurality of, and the last described delivery port 34 of adjacent two described filtration cavitys 3 is connected with water inlet 33 described in rear; As preferred embodiment, described filtration cavity 3 is made as three, thereby has formed three-stage filtration, has both saved cost, the degree of purification of the water purification guaranteeing again.

The backwash process of self-pressure back-flushing filtering device described in the utility model is as follows:

First, close described pure water inlet 2, open the described blowdown outlet 32 of described filtration cavity 3 lower ends, described water purification flows backwards, and the water purification pressure in described air storage chamber 4 reduces simultaneously, and compressed air and described expanded film 41 reset from bottom to top, thereby the water purification refluxing is produced to certain thrust, make the water purification that described filter core 31 is carried out to the backwash of from-inner-to-outer there is larger recoil strength, thereby can smoothly the impurity on described filter core 31 be rinsed well, as shown in Figure 2.

Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.

Claims

1. a self-pressure back-flushing filtering device, it comprises original water inlet (1), pure water inlet (2), and be located at the filtration cavity (3) between described original water inlet (1) and described pure water inlet (2), in described filtration cavity (3), be provided with filter core (31) and the blowdown outlet (32) with purification function, it is characterized in that: between described filtration cavity (3) and described pure water inlet (2), be provided with position lower than the air storage chamber (4) of described pure water inlet (2).

2. self-pressure back-flushing filtering device according to claim 1, is characterized in that: in described air storage chamber (4), be also provided with the expanded film (41) for isolating clean water and air.

3. self-pressure back-flushing filtering device according to claim 2, it is characterized in that: on described filtration cavity (3), also form water inlet (33) and delivery port (34), described water inlet (33) and vertical the communicating of described original water inlet (1), described filter core (31) is " U " type, and communicate with described delivery port (34), described delivery port (34) is connected with described air storage chamber (4), and the lower end of described filter core (31) cavity is located in described blowdown outlet (32).

4. self-pressure back-flushing filtering device according to claim 3, is characterized in that: described filtration cavity (3) is made as a plurality of, and the last described delivery port (34) of adjacent two described filtration cavitys (3) is connected with water inlet (33) described in rear.

5. self-pressure back-flushing filtering device according to claim 4, is characterized in that: described filtration cavity (3) is made as three.

6. self-pressure back-flushing filtering device according to claim 5, is characterized in that: described expanded film (41) is made by having flexible silica gel.