CN2396870Y

CN2396870Y - Self-cleaning thick filter

Info

Publication number: CN2396870Y
Application number: CN 99204546
Authority: CN
Inventors: 余承烈
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-02-10
Filing date: 1999-02-10
Publication date: 2000-09-20
Anticipated expiration: 2009-02-10

Abstract

The utility model relates to a self-cleaning coarse filter. Two identical passages are arranged in the filter, an entrance of the passage is provided with one sector ball valve which can alternatively conduct and close the two passages, a filter net is arranged in the passage, a water discharge hole is arranged on the filter net, perforated plates behind the filter nets of the two passages are respectively provided with an ejector and a back valve, and a drain valve and a drainage intake valve are arranged on side walls of the two passages. Because the two passages are designed on the inner part of one filter, and the functions of the non-return valve and the ejector are utilized, and simultaneously, two processes of filtering and backwashing are completed, the utility model has the advantages of simple structure, small size and high efficiency. In addition, automation is easily realized.

Description

The self-cleaning coarse filter

The utility model belongs to mechanical filter design and manufacturing technology field.

At nature, the endless form of water is divided two kinds, and a kind of Natural Circulation that is referred to as is that water relies on natural strength and circulates.Another kind is called society's circulation, is that water is as medium cyclic process for people to use.In the social cyclic process of water, invaded a large amount of suspensions in the water, suspension becomes the impurity that stands in the breach and will remove in the middle of the water treatment technology.Filtration is to remove hang＜to float〉float a kind of effective means of thing.Divide from filtered version, pressure filtration and gravity filtration are arranged.Filter-press can also be further divided into: granular media filter, fabric filter, slit filter.The utility model belongs to a kind of modified filter in the filter of slit.The suspension that why makes coarse filter be meant that the utility model is tackled is compared with granular media filter, fabric filter, and diameter is bigger, only accounts for the part of suspension in the water.Above-mentioned three kinds of filters, preceding two kinds of filters can not be finished filter medium＜be called filtrate generally when filtering〉backwash process.A kind of self-cleaning filter that cries is arranged in the filter of slit, and it can be when filtering, filter individually post (filter core〉finish backwash.Yet there are no the filter of energy automatic backwash when filtering in addition on the market.

Purpose of the present invention is providing a kind of volume little, simple in structure, can remove the part suspension, when filtering, finishing backwash has the self-cleaning coarse filter of certain applicable situation, it can be removed in the water effectively greater than certain all suspension more than the diameter, alleviates the burden of subsequent treatment, perhaps satisfies customer requirements.

The purpose of this utility model is achieved in that the self-cleaning coarse filter, it is characterized in that in filter, having two identical passages, but an alternate conduction and the fan-shaped ball valve 1 of closing two passages are arranged in the porch of passage, one filter screen 2 is arranged in passage, water hole is arranged on filter screen, on the cowling panel 3 of the filter screen back of two passages, injector 4 and non-return valve 8 are housed respectively, draining valve 5 and draining intake valve 6 are housed on the sidewall of two passages.

Wherein filter screen 2 can be metal, plastic products, and water hole is taper or circular platform type.Filter screen 2 also can be a fibre.

On the pipeline that water passes through, connect a self-cleaning coarse filter, diameter is about the irregular ellipsoid of 6 times of pipe diameters.Two identical passages are arranged in the ellipsoid, these two passages: can also be standby each other, function is identical, before admission passage, establish the fan-shaped reversal valve of a fan-shaped ball valve＜also cry 〉, valve body by fan-shaped ball valve rotates, and closes the purpose of another passage when can reach passage of conducting.The passage of conducting is finished normal filtering technique, and pent passage is finished backwash process, after backwash is finished, reaches stand-by state.During filtration, foreign material are intercepted on the filter screen in the water, and filter back water is opening by the non-return valve＜this moment on the cowling panel 〉, centesimal approximately water is by being installed in the injector＜adverse current on the cowling panel〉enter the downstream of this filter.When the pressure difference value behind pressure before the filter screen and the cowling panel reaches 0.03～0.04Mpa, be installed in the pressure reduction actuating of relay of this filter, connect the wealthy executing agency＜servo of fan-shaped ball〉power supply, fan-shaped ball valve begins to rotate, to open the passage of stand-by state, and close the passage that is filtering.Alternate channel begins to enter the filtration state, and function and process and pent passage are just the same, and pent passage enters backwash technique.After fan-shaped ball valve puts in place, connect draining valve＜magnetic valve or motor-driven valve〉and the draining intake valve (magnetic valve or motor-driven valve〉power supply, this two valve is opened.The interior water of this passage this moment is discharged from outside the filter body, because the current in the passage are with to close preceding water (flow) direction opposite, so the non-return valve that is installed on the cowling panel is closed immediately, injector on the cowling panel under pressure, begin to bring into play jet-action, and the very fast suction air of coming in from the draining intake valve, in the mixing chamber of injector, mix the back and spray to filter screen with certain speed with water, because the water before the filter screen is released by draining valve, so swept away by the air water mixed flow attached to the suspension on the filter screen, both drained.Flushing for convenience, when the filter screen material was metal or plastic products, eyelet was made the tapered space of truncated cone-shaped, and diameter is blocked foreign material from large to small easily during filtration, and the diameter foreign material that change from small to big are swept away easily during backwash.The draining intake valve have concurrently with when flushing injector be sprayed on the effect that the ponding that forms on the filter screen is in time drained.After flushing is finished, disconnect draining valve and draining intake valve power supply by the time relay, this two valve returns to original closed condition, and the water that comes out from injector nozzle this moment just accumulates before and after the filter screen, forces gas drain from the automatic exhaust steam valve at top.Water is full of the back automatic exhaust steam valve and closes this passage and reach stand-by state.When quadrant valve was opened this passage, this passage entered filter process immediately.

Effect of the present utility model is: owing in a filter, design two kinds of passages, and utilize non-return valve, the function of injector, finish two processes of filtration and backwash simultaneously, so simple in structure, volume is little, function is strong, and the efficient height is realized automation easily.Various relays, actuator, magnetic valve＜motor-driven valve〉all be mature equipment, can guarantee to filter and backwash effect.

It is thicker that the utility model is fit to particle, to the demanding occasion of water supply continuity, also can be used as the preposition filtration of other filter, plays the effect of giving filtration.The suspended particle that is blocked can be adjusted by the eyelet pore size of filter screen.

Concrete structure of the present utility model is provided by accompanying

drawing

1,2,3,4.

Fig. 1 is according to the vertical view after cuing open in the self-cleaning coarse filter level that the utility model proposes;

Fig. 2 is its profilograph;

Fig. 3 is the front view of filter screen, cowling panel;

Fig. 4 is the profile of filter screen;

Below in conjunction with Fig. 1,2,3,4 describe the composition according to the self-cleaning coarse filter that the utility model proposes in detail.

Among Fig. 1: 1 one fan-shaped ball valves, 2 one filter screens, 3 one cowling panels, 4 one injectors, 5 one draining valves, 6 one draining intake valves, 8 one non-return valves, 13 1 filter housings;

Among Fig. 2: 2 one filter screens, 5 one draining valves, 6 one draining intake valves, 7 one Pressure gauges, 10 1 injector water inlets, 12 1 automatic exhaust steam valves, 13 1 filter housings:

Among Fig. 3: 2 one filter screens, 3 one cowling panels, 9 one check valve openings, 10 1 injector water inlets, 13 1 filter housings;

Among Fig. 4: 2 one filter screens;

Shown in Fig. 1,2,3,4, fan-shaped ball valve 1 is in the import department of filter, with a pathway closure, another passage is at the filtration state.Water is by No. 2, filter screen, pass through the non-return valve 8 on the cowling panel 3 again after, outflow filter flows to the user.Along with the carrying out of filtering must be caused before the filter screen 2 and pressure differential behind the cowling panel 3, cause the pressure reduction actuating of relay thus, the executing agency that starts fan-shaped ball valve 1 turns to fan-shaped ball valve 1 this passage is closed, and stops the into state of water, this moment, another passage was opened, the beginning filter process.If the passage of being closed by fan-shaped ball valve 1 will carry out the filter screen backwash, then open draining valve 5 and draining intake valve 6, the water of this passage of emptying causes reverse pressure reduction before cowling panel 3 backs and filter screen 2, water is closed non-return valve 8 under pressure by injector 4 ejections, and suck the air of coming in from draining intake valve 6, form the air water mixed flow, spray to filter screen 2, the foreign material that stick on the filter screen 2 are subjected to this impulsive force, just split away off, with water from draining valve 5 outside the discharge filter.Concentrated discharge from draining intake valve 6 by the water that filter screen is stopped.Backwash is then closed draining valve 5 and draining intake valve 6 through behind the certain hour, and after closing, this passage begins water-filling, and the gas in the passage is discharged from automatic exhaust steam valve 12, and after water was full of, this passage was finished backwash process, reaches stand-by state.

Claims

1. self-cleaning coarse filter, it is characterized in that: two identical passages are arranged in filter, but an alternate conduction and the fan-shaped ball valve (1) of closing two passages are arranged in the porch of passage, one filter screen (2) is arranged in passage, water hole is arranged on filter screen, on the cowling panel (3) of the filter screen back of two passages, injector (4) and non-return valve (8) are housed respectively, draining valve (5) and draining intake valve (6) are housed on the sidewall of two passages.

2. self-cleaning coarse filter according to claim 1 is characterized in that filter screen (2) can be metal, plastic products, and water hole is taper or circular platform type.

3. self-cleaning coarse filter according to claim 1 is characterized in that filter screen (2) can be a fibre.