CN202161860U

CN202161860U - Automatic backwash filter

Info

Publication number: CN202161860U
Application number: CN2011202237511U
Authority: CN
Inventors: 罗加永
Original assignee: HEFEI SANFAN WATER TREATMENT EQUIPMENT CO Ltd
Current assignee: HEFEI SANFAN WATER TREATMENT EQUIPMENT CO Ltd
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2012-03-14
Anticipated expiration: 2021-06-28

Abstract

The utility model discloses an automatic backwash filter, which comprises an outer casing provided with a water inlet, a water outlet, an access hole and an upper sewage discharge hole. A valve plate shaft and a circular valve plate are arranged in the outer casing, a cylindrical screen is arranged outside the valve plate and provided with a plurality of filter holes (slits), and a Z-shaped plate is arranged in the outer casing so that the outer casing is divided into a water inlet cavity and a water outlet cavity. During filtering, water flows into the water inlet cavity from the water inlet, enters the cylindrical screen through the Z-shaped plate, enters the water inlet after being filtered by the cylindrical screen, and then flows from the water outlet. In the normal filtering process, the valve plate turns along the water flow direction; after the quantity of filtered impurities reaches a certain value, backwash is started, the circular valve plate rotates by 90 degrees, and the sewage discharge hole is opened simultaneously. Since the sewage discharge hole is communicated with the atmosphere, the cylindrical screen is washed by clean water which is filtered at the front end of the filter, and then waste water is discharged from the sewage discharge hole after being used for washing. Difference in density of impurities in water is higher, and the impurity with the density lower than that of water can be removed from the cylindrical screen by the aid of the sewage discharge hole arranged on the filter.

Description

Automatic back-flushing filter

Technical field:

The utility model relates to a kind of water treatment filter, and particularly a kind of theory of mechanics is removed the automatic back-flushing filter of impurity in the water, is particularly suitable in the water density much smaller than the impurity of water.

Background technology:

The raising of Along with people's quality of life; Protection to natural environment has proposed new requirement, to utilizing particularly importantly again with the live protection of closely bound up water resource of people, no matter is water for industrial use particularly; Chemical industry system water; And the filtration of well water, river etc. all need carry out the filtration treatment of water, so that the water that obtains cleaning and reasonably utilizing again, thereby reach protection water resource and water-saving purpose.

Like Fig. 1, shown in 2, be filtration, the recoil view of existing known backwash filter, this backwash filter 10 includes a shell 11, a cartridge filter 12, a recoil valve plate 13; This shell body 11 is provided with water inlet 14, delivery port 15 and sewage draining exit 16; This cartridge filter 12 is provided with a plurality of filtering holes 121; This cartridge filter 12 is communicated with the welding of shell body 11 water inlet ends; Recoil valve plate 13 is somebody's turn to do in cartridge filter 12 installings near water inlet end, and these recoil valve 13 central authorities are fixed on the valve shaft 17 through a steady pin 18, and this valve shaft 17 passes cartridge filter 12 rotatable being articulated on the shell body 11; This valve shaft 17 termination spiral shells knot one handles 19 are with the unlatching of controlling this recoil valve plate 13 or close; Fig. 1 is the filtration view of backwash filter 10; Wherein should be the unlatching shape by recoil valve plate 13; Sewage draining exit 16 is closed; When water gets into cartridge filters 12 from water inlet 14, and flow to delivery port 15 after filtering through a plurality of filtering holes on the cartridge filter 12 121 and supply with water systems (shown in the direction of arrow among Fig. 1); Impurity will carry out the backwash processing in order to remove impurity, at this moment more for a long time in cartridge filter 12; Close the recoil valve plate 13 in the cartridge filter 12; Close delivery port 15 simultaneously, open sewage draining exit 16, when the water valve plate 13 that when water inlet 14 gets into, recoiled stops; Can only flow into cartridge filters 12 through a plurality of filtering holes 121 recoils from the space of 11 of cartridge filter 12 and shell bodies, discharge (shown in the direction of arrow Fig. 2) from sewage draining exit 16 with flushing impurity therebetween; But, in backwash process,, can't wash from the net tube much smaller than the impurity of water (like wood chip etc.) density, and can't establish access hole because sewage draining exit is located at the lower end, when special circumstances occurring, can't tin overhaul and clear up netting.

Sign in this, for overcoming above-mentioned shortcoming, this creator through test and improvement repeatedly, develops the utility model to be engaged in this work technology and practical experience for many years finally.

Summary of the invention:

The utility model technical problem to be solved provides a kind of filter that can effectively overcome above-mentioned defective.

It is such solving the problems of the technologies described above the technical scheme that is adopted:

Which is provided with water inlet, delivery port and access hole, last sewage draining exit is provided with valve shaft in this circular housing body; Valve shaft is provided with circular valve plate, and valve plate is provided with the net tube outward, establishes a lot of filtering holes on the net tube; Z-shaped plate will be divided into intake antrum and water chamber with housing in shell body.

For the impurity less than water can be discharged in filter screen, the end of circular housing body is provided with sewage draining exit, is connected with blowoff valve through pipeline on the sewage draining exit.

The impurity less than water can be prone to discharge in filter screen in the filter in order to make, and the net tube in the housing is connected through eccentric reducer with the sewage draining exit on the housing.

Net tube in this circular housing body has the hole of various ways, is convenient to the processing of multiple water quality.

The end of this rotating shaft is provided with wind.

Have square opening in this circular valve plate, cooperate with the square pole that rotating shaft is provided with.

The utility model discloses a kind of automatic back-flushing filter, it includes shell body, which is provided with water inlet, delivery port and access hole; Last sewage draining exit is provided with valve shaft in this shell body, and valve shaft is provided with circular valve plate; Valve plate is provided with the net tube outward; Establish a lot of filtering holes (seam) on the net tube, Z-shaped plate will be divided into intake antrum and water chamber with housing in shell body.Water flows into intake antrum from water inlet during filtration, in the laggard networking tube of Z-shaped plate, after the net tube filters, gets into water chamber, flows out from outlet then; In net tube, valve plate is along water (flow) direction, after the impurity that filters reaches certain amount during normal filtration; Will start backwash, circular valve plate half-twist during backwash is opened sewage draining exit simultaneously; Have only this moment net tube leading portion to participate in filtering,, utilize the clear water after front end filters that the net tube of rear end is washed because of sewage draining exit and atmosphere; Waste water after the flushing is discharged from sewage draining exit, because the impurity density in the water differs greatly, the density that has is littler than water; The density that has is bigger than water, is provided with sewage draining exit, can remove from the net tube by the impurity that density is littler than water.After tube rear end to be netted cleans up; Open valve plate rapidly; Formed a negative pressure before this moment in the net tube, fast of the clear water after the filter cleans front end net tube, and the backwash current are brought impurity into the back-end network tube with the filtered water stream of advancing; When treating next backwash together with filtering impurity backwash down, thereby guarantee that net tin can move continuously.Because during backwash, the net tube of front end still filtering, so filter is the on-line filtration backwash, can guarantee the uninterrupted water supply of pipe-line system.The utility model is simple for structure, and is easily manufactured, and its advantage is following:

1, can realize the online work that filter on backwash limit, limit, need not to establish in addition back-washing equipment;

2, cross logical ratio greatly, resistance is little;

3, the scope of application is wide, can be used for industrial water supply, chemical industry system water and well water, and the protectiveness that is particularly suitable for behind the pump is filtered;

4, can effectively filter and remove the impurity that density does not wait in the water, be particularly suitable for density in the water much smaller than the impurity of water (like wood chip etc.);

5, easy to maintenance, can carry out the labor cleaning to the net tube.

Description of drawings:

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Fig. 1 is the filtration view of known backwash filter.

Fig. 2 is that view is filtered on the backwash limit, limit of known backwash filter.

Fig. 3 is the filtration view of the utility model.

Fig. 4 is that view is filtered on the backwash limit, limit of the utility model.

Fig. 5 is the structural representation of Z-shaped plate.

Fig. 6 is the domatic figure of Fig. 5.

The specific embodiment:

Like Fig. 3,4,5, shown in 6, be recoil automatically the filtration state of filter, structural representation and the structural representation of Z-shaped plate of recoil state of the utility model, this automatic back-flushing filter 20 includes shell body 22; The shell body middle part is welded with steel pipe up and down, is welded with flange on the steel pipe, and last lower flange has been formed water inlet 29, delivery port 25; The left end of shell body is welded with concentric reducer and flange, is connected with blind flange on the flange, has constituted access hole 21; The right-hand member of housing is last sewage draining exit 27, and sewage draining exit is connected with valve through steel pipe, and valve is the blowoff valve 28 of filter; Sewage draining exit 27 is provided with valve shaft 211 through size 26 and the welding of net tube port with one heart in this shell body of head, and valve shaft 211 is provided with circular valve plate 24; Valve plate outer 24 is provided with net tube 23, establishes a lot of filtering holes (seam) on the net tube 23, Z-shaped plate 212 and shell body 22 and 23 welding of net tube; In shell body 22, shell body 22 is divided into intake antrum and water chamber.Is furnished with rotating shaft 211 on the circular valve plate 24; Wind 210 is equipped with in the rotating shaft end; Circular valve plate 24 adopts square opening to cooperate installation with rotating shaft 211, to guarantee that circular valve plate can freely rotate with rotating shaft, has hole (seam) on the net tube 23; The shape in its hole can be set as multiple shape according to technological requirement, like circle, V-arrangement bar seam etc.

The filtration state of the utility model, as shown in Figure 3, water flows into intake antrum from water inlet 29 during filtration, in Z-shaped plate 212 laggard networking tubes 23; After net tube 23 filters, get into water chamber, flow out from delivery port 25 then, in net tube 23, valve plate 24 is along water (flow) direction during normal filtration; After the impurity that filters reaches certain amount, will start backwash, circular valve plate 24 half-twists are as shown in Figure 4 during backwash; Open blowoff valve 28 simultaneously, have only this moment net tube 23 leading portions to participate in filtering,, utilize the clear water after front end filters that the net tube of rear end is washed because of sewage draining exit 27 and atmosphere; Waste water after the flushing is discharged from last sewage draining exit 27, because the impurity density in the water differs greatly, the density that has is littler than water; The density that has is bigger than water, is provided with sewage draining exit, can density be removed from net tube 23 more than the little impurity of water.After treating that net tube 23 rear ends clean up; Open circular valve plate 24 rapidly; Form negative pressure in this moment net tube 23 leading portions, fast of the clear water after the filter cleans net tube 23 leading portions, the backwash current with the filtered water stream of advancing with impurity band tube 23 rear ends that network; When treating next backwash together with filtering impurity backwash down, thereby guarantee that net tin can move continuously.When needing maintenance and cleaning in the net tube 23, can open manhole 21, to overhauling and clear up in the net tube 23, guarantee the special circumstances generation, filter still can normally use after through simple processing.Because during backwash, net tube 23 front ends so filter is the on-line filtration backwash, can guarantee long uninterrupted water supply of pipe-line system still filtering.

Claims

1. automatic back-flushing filter, it includes shell body, which is provided with water inlet, delivery port and access hole; Last sewage draining exit is characterized in that: be provided with valve shaft in the shell body, valve shaft is provided with circular valve plate; Valve plate is provided with the net tube outward; Establish filtering holes on the net tube, Z-shaped plate is divided into intake antrum and water chamber with housing in shell body.

2. by the described automatic back-flushing filter of claim 1, it is characterized in that: the end of circular housing body is provided with sewage draining exit, is connected with blowoff valve through pipeline on the sewage draining exit.

3. by the described automatic back-flushing filter of claim 1, it is characterized in that: the net tube in the housing is connected through eccentric reducer with the sewage draining exit on the housing.