CN201182940Y

CN201182940Y - Micro-pouring horizontal type spiral self-cleaning net filter

Info

Publication number: CN201182940Y
Application number: CNU2008201036195U
Authority: CN
Inventors: 刘焕芳; 郑华平; 宗全利; 郑铁刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-29
Filing date: 2008-04-29
Publication date: 2009-01-21
Anticipated expiration: 2018-04-29

Abstract

The utility model relates to a net type filter, which comprises a filter casing body, a water inlet pipe, a water outlet pipe, a sewage discharging pipe, a valve, a first filter chamber which is composed of a cylindrical net type filter net, a secondary filter chamber, a hollow shaft in the secondary filter chamber and a suction head on the hollow shaft. The net type filter is characterized in that a flow driving spiral impeller is arranged in the hollow shaft. The net type filter has the advantages that the structure is simple, the performance is reliable, the volume is small, the filtration flow is large, the construction cost and the maintenance cost are low, the self-cleaning is accomplished in the situation that the operation is not interrupted, and when an automatic control device is arranged, the automaticity is high, the consumed time is short, and the sewage discharging effect is good, thereby the net type filter can be widely applied in farmland water-saving irrigation systems.

Description

Slight irrigation horizontal spiral self-cleaning web filter

Technical field:

The utility model relates to the well strainer that the farmland water-saving irrigation system is used, especially a kind of slight irrigation horizontal spiral self-cleaning web filter.

Background technology:

China's water resource is very short, water resources ownership per capita only is a world average level 1/4th, and agricultural is the water rich and influential family, therefore, the accelerated development agricultural water conservation is imperative, the fast development of micro irrigation technology just requires advanced filter plant to adapt with it, the slight irrigation automatic cleaning strainer is the trend of at present domestic and international filter research and development, but a lot of key technologies and equipment need further investigation, particularly cleaning the new achievement in research of urgent need on power and the cleaning way, therefore design a kind of good reliability, can economical operation, the filter that can clean automatically is very urgent again.

Some achievements in research of domestic self-cleaning filter can be finished the automatic cleaning of filtering dirt impurity to a certain extent, but its cleaning mechanism or transmission mechanism need external force to drive, as all be Motor Drive, maybe need to set up bigger blowdown chamber, the volume of filter is increased, thereby increased the manufacturing cost and use cost of filter.

Chinese patent CN2636944 discloses a kind of self-priming backwash net-type filter, the main filter chamber that constitutes by filter housings, water inlet pipe, outlet pipe and blow-off pipe, tubular screen pack, in the filter chamber, be provided with hollow shaft, be provided with the blowdown chamber in the filter housings before the blow-off pipe, the other end of described hollow shaft stretches in the blowdown chamber, be provided with several suction nozzles on one section hollow shaft in the filter chamber, one section hollow shaft in the blowdown chamber is provided with water jets, is equipped with valve on blow-off pipe, water inlet pipe and outlet pipe.But this filter is the thrust that relies on the water jets water spray on the hollow shaft to be produced when backwash drives the hollow shaft rotation, because of water jets is located in the blowdown chamber, just need bigger blowdown chamber, so will increase the volume of filter, so also just increase the cost and the maintenance cost of filter.

Summary of the invention:

The purpose of this utility model is to provide that a kind of volume is little, filtering traffic is big, cost and the low horizontal spiral self-cleaning web filter of maintenance cost.

The utility model comprises the hollow shaft in one-level filter chamber that filter housings, water inlet pipe, outlet pipe, blow-off pipe, valve and cylindrical net formula screen pack constitute, cascade filtration chamber, the cascade filtration chamber, the suction nozzle on the hollow shaft, it is characterized in that being provided with in the described hollow shaft current and drives helical runner.

Described filter chamber preferably is made of one-level filter chamber, cascade filtration chamber.

Above-mentioned water inlet pipe, outlet pipe and blow-off pipe are provided with Pressure gauge.

The utility model preferably is provided with automaton, comprise controller and pressure sensor, described pressure sensor is located at respectively on water inlet pipe and the outlet pipe, and the valve on outlet pipe and the blow-off pipe is a magnetic valve, and described magnetic valve, pressure sensor are connected with controller.

The utility model course of work is as follows: enter the one-level filter chamber when irrigation contains the sand muddy water by water inlet pipe mouth, some big impurity, mainly be floating thing or tackled by the coarse filtration net greater than the silt particle of inhaling sand assembly suction inlet aperture, enter the cascade filtration chamber then, pass through fie screen from inside to outside, flow out by the side outlet pipe, bigger than fie screen mesh like this silt particle particle is blocked and accumulates in the inner surface of filter screen, increase along with filtration time, the thin outer pressure reduction of in-core that filters progressively increases, when pressure reduction arrives the predetermined pressure difference value, open blowoff valve, the blowdown cavity pressure reduces, on the suction nozzle local area on the hollow shaft, the thin filter core external pressure of crossing is higher than thin filtration in-core pressure, and the filter residue on the hollow shaft on the suction nozzle coverage rate is filtered the water recoil, and filtered water is impacted the impeller generation moment of momentum rotates it, and drive suction nozzle rotation, inhale all over the whole filtering net inner surface, promote current simultaneously and advance, discharge by blow-off pipe, eliminating along with filter screen inner surface silt particle, the filter screen inside and outside differential pressure will reduce gradually, and cleaning is finished, and closes blowoff valve, open outlet valve simultaneously, suction nozzle on the hollow shaft stops the rotation, and changes the normal filtration state over to, has so just finished thin self-cleaning of crossing filter core.

The course of work that the utility model is controlled automatically is as follows: enter the one-level filter chamber when irrigation contains the sand muddy water by water inlet pipe mouth, some big impurity, mainly be floating thing or tackled by the coarse filtration net greater than the silt particle of suction nozzle suction inlet aperture on the hollow shaft, enter the cascade filtration chamber then, pass through fie screen from inside to outside, flow out by the side outlet pipe, bigger than fie screen mesh like this silt particle particle is blocked and accumulates in the inner surface of filter screen, increase along with filtration time, the thin outer pressure reduction of in-core that filters progressively increases, when pressure reduction during greater than default pressure difference, pressure difference transmitter sends signal, open the electromagnetism blowoff valve by automaton, the blowdown cavity pressure reduces, on suction nozzle local area on the hollow shaft, the thin filter core external pressure of crossing is higher than thin filtration in-core pressure, the filter residue of inhaling on the sand assembly coverage rate is filtered the water recoil, filtered water is impacted the impeller generation moment of momentum rotates it, and suction nozzle rotation on the drive hollow shaft, inhale all over the whole filtering net inner surface, promote current simultaneously and advance, discharge by blow-off pipe, along with the eliminating of filter screen inner surface silt particle, the filter screen inside and outside differential pressure will reduce gradually, when being lower than setting value, clean automatically and finish, controller cuts out blowoff valve, open outlet valve simultaneously, suction nozzle stops the rotation on the hollow shaft, changes the normal filtration state over to, has so just finished thin automatic cleaning of crossing filter core.

The utility model is simple in structure, dependable performance, volume is little, filtering traffic is big, cost and maintenance cost are low, under the situation of interruption of work not, finish self-cleaning, when being provided with automaton, the automaticity height, weak point expends time in, filth-discharging effect is good, can be widely used in the farmland water-saving irrigation system.

Description of drawings:

Fig. 1 is the utility model example structure schematic diagram.

Fig. 2 is the blowdown apparatus schematic cross-section.

1 is water inlet pipe shown in the figure, and 2 is sensor, and 3 is the one-level filter chamber, and 4 is coarse strainer, and 5 is filter housings, 6 is helical runner, and 7 is the secondary filter chamber, and 8 is suction nozzle, and 9 is hollow shaft, and 10 is fie screen, 11 is magnetic valve, and 12 is blow-off pipe, and 13 is controller, and 14 is outlet pipe, and 15 is Pressure gauge.

The specific embodiment:

Embodiment 1:

With reference to accompanying drawing 1, present embodiment comprises filter housings 5, water inlet pipe 1, outlet pipe 14 and valve, blow-off pipe 12 and valve, Pressure gauge 15, hollow shaft 9 in one-level filter chamber 3, coarse strainer 4, secondary filter chamber 7, fie screen 10 and the secondary filter chamber that cylindrical net formula screen pack constitutes, the suction nozzle 8 on the hollow shaft are provided with current and drive helical runner 6 in the described hollow shaft.

Embodiment 2:

Be also to be provided with automaton with the difference of embodiment 1, comprise controller 13 and pressure sensor 2, described pressure sensor is located at respectively on water inlet pipe and the outlet pipe, valve on outlet pipe and the blow-off pipe is a magnetic valve 11, and described magnetic valve, pressure sensor are connected with controller.

Claims

1, a kind of slight irrigation horizontal spiral self-cleaning web filter, comprise the suction nozzle (8) on filter chamber that filter housings (5), water inlet pipe (1), outlet pipe (14), blow-off pipe (12), valve and cylindrical net formula screen pack constitute, the hollow shaft in the filter chamber (9), the hollow shaft, it is characterized in that being provided with in the described hollow shaft current and drive helical runner (6).

2, a kind of slight irrigation horizontal spiral self-cleaning web filter as claimed in claim 1 is characterized in that described water inlet pipe (1), outlet pipe (14) and blow-off pipe (12) are provided with Pressure gauge (15).

3, a kind of slight irrigation horizontal spiral self-cleaning web filter as claimed in claim 1 or 2, it is characterized in that being provided with automaton, comprise controller (13) and pressure sensor (2), described pressure sensor (2) is located at respectively on water inlet pipe (1) and the outlet pipe (14), valve on outlet pipe (14) and the blow-off pipe (12) is magnetic valve (11), and described magnetic valve (11), pressure sensor (2) are connected with controller (13).

4, a kind of slight irrigation horizontal spiral self-cleaning web filter as claimed in claim 1 or 2 is characterized in that described filter chamber constitutes (7) by one-level filter chamber (3) and cascade filtration chamber.

5, a kind of slight irrigation horizontal spiral self-cleaning web filter as claimed in claim 3 is characterized in that described filter chamber constitutes (7) by one-level filter chamber (3) and cascade filtration chamber.