CN107519689B - An irrigation water source filtering device and its control method - Google Patents

Abstract

The invention discloses an irrigation water source filtering device, which comprises a sandstone filter, a centrifugal filter and a mesh filter arranged in series through pipelines, the inlet of the pipeline is provided with a first electromagnetic valve, and the inlet and outlet of the sandstone filter are respectively A second solenoid valve and a third solenoid valve are provided, a recoil water inlet pipe is connected in parallel between the second solenoid valve and the third solenoid valve, a fourth solenoid valve is arranged on the recoil water inlet pipe, and a sandstone filter is provided with a filter plate, a recoil outlet pipe is arranged above the filter plate, an electric valve is installed on the recoil outlet pipe, a reservoir is connected between the first solenoid valve and the second solenoid valve through the fifth solenoid valve, and the centrifugal filter The inlet and the outlet are respectively provided with a sixth solenoid valve and a seventh solenoid valve, and the outlet of the pipeline is provided with a ninth solenoid valve. The invention can improve the deficiencies of the prior art, can effectively filter the irrigation water, and reduces the economic loss caused by many impurities in the irrigation water to agricultural irrigation.

Description

An irrigation water source filtering device and its control method

technical field

The invention relates to an irrigation device for agriculture and forestry, in particular to an irrigation water source filtering device and a control method thereof.

Background technique

Water and fertilizer integrated irrigation as the current main irrigation method can solve the problem of water and fertilizer waste, but there are many impurities in the irrigation water, especially in the groundwater in mountainous areas. There are a lot of sand and gravel. There is a large amount of algae, and these impurities will cause blockage of fertilization and irrigation pipes, resulting in water and fertilizer shortages for crops, resulting in huge economic losses.

Contents of the invention

The technical problem to be solved by the present invention is to provide an irrigation water source filtering device and its control method, which can solve the deficiencies of the prior art, can effectively filter irrigation water, and reduce the economic impact of agricultural irrigation caused by the many impurities in irrigation water. loss.

In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

An irrigation water source filtering device, comprising a gravel filter, a centrifugal filter and a mesh filter arranged in series through pipelines, the inlet of the pipeline is provided with a first solenoid valve, and the inlet and outlet of the gravel filter are respectively provided with second solenoid valves. A recoil water inlet pipe is connected in parallel between the solenoid valve and the third solenoid valve, the second solenoid valve and the third solenoid valve, the fourth solenoid valve is arranged on the recoil water inlet pipe, and a filter plate is arranged in the gravel filter to filter A recoil outlet pipe is arranged above the plate, an electric valve is installed on the recoil outlet pipe, a reservoir is connected between the first solenoid valve and the second solenoid valve through the fifth solenoid valve, and the inlet and outlet of the centrifugal filter are respectively The sixth solenoid valve and the seventh solenoid valve are provided, the inlet of the centrifugal filter is also provided with a first pressure sensor, the slag outlet of the centrifugal filter is provided with an eighth solenoid valve, and the inlet and outlet of the net filter are respectively provided with For the second pressure sensor and the third pressure sensor, the outlet of the pipeline is provided with a ninth solenoid valve, and the slag discharge port of the screen filter is provided with a tenth solenoid valve.

Preferably, a fertilizer inlet and a stirring motor are provided on the top of the sand filter, a stirring paddle connected to the stirring motor is provided inside the sand filter, and a circulation motor is provided on the recoil water inlet pipe.

As a preference, several installation holes are uniformly arranged on the filter plate, hollow tubes are fixed in the installation holes, and filter caps are arranged on the top of the hollow tubes.

As a preference, two mutually parallel annular baffles are arranged inside the filter cap, and the inner edge of the annular baffle is provided with an upwardly inclined extension plate, and blades are arranged between the two annular baffles, and the blades are connected to each other through a connecting shaft. The top of the hollow tube.

Preferably, the blade is provided with a longitudinal through hole, the longitudinal through hole runs through the blade, the angle between the longitudinal through hole and the connecting shaft is 15°, and a transverse through hole is arranged between the longitudinal through hole and the bottom surface of the blade, and the transverse through hole is connected to the bottom surface of the blade. The longitudinal through holes are perpendicular to each other.

A control method of the above-mentioned irrigation water source filtering device, comprising the following steps,

A. Open the ninth solenoid valve, the seventh solenoid valve, the sixth solenoid valve, the third solenoid valve and the second solenoid valve in order, and open the first solenoid valve when the groundwater source is sufficient, and the groundwater will provide water for irrigation. When the water source is insufficient, the fifth solenoid valve is opened to provide water for irrigation from the reservoir, and other valves are closed;

B. Irrigation water is filtered through the sand filter, centrifugal filter and mesh filter in turn, and then enters the downstream equipment;

C. Comparing the data of the second pressure sensor and the third pressure sensor, when the pressure difference reaches the threshold, it indicates that the mesh filter is clogged. At this time, the tenth solenoid valve is opened, and the ninth solenoid valve is closed at the same time. At this time, the flow through The irrigation water of the upper two-stage filter flushes the screen filter and discharges slag;

D. Compare the data of the first pressure sensor and the second pressure sensor. When the pressure difference reaches the threshold, it indicates that the centrifugal filter is clogged. At this time, the eighth solenoid valve is opened, and the seventh solenoid valve is closed at the same time. The irrigation water of the filter is used to flush and discharge the slag of the centrifugal filter;

E. When the irrigation is over, it is necessary to backwash the gravel filter, open the fourth solenoid valve and the electric valve, close the second solenoid valve and the sixth solenoid valve, at this time, the irrigation water enters the filter from the bottom of the gravel filter The plate is backwashed, and impurities flow out from the backwash outlet pipe.

As a preference, add fertilizer from the fertilizer port to the gravel filter, and the undissolved fertilizer is intercepted by the filter plate on the upper part of the filter plate, and the stirring motor drives the stirring paddle to stir until the fertilizer dissolves before entering the sand filter through the filter plate At the bottom of the filter, close the first solenoid valve, fifth solenoid valve and sixth solenoid valve, open the second solenoid valve, fourth solenoid valve and third solenoid valve, and circulate the motor so that the fine particles passing through the filter plate are pumped to the gravel The upper part of the filter dissolves again.

The beneficial effects brought about by adopting the above technical scheme are: the present invention has simple equipment, convenient operation, high filtration precision of the filter plate, automatic backwashing can be realized, stable and normal work is ensured, and the impact of impurities in irrigation water on agriculture is reduced. Economic losses due to irrigation. The sand filter has the buffer function of dissolving fertilizer, which improves the efficiency of dissolving fertilizer, improves the accuracy of dissolving fertilizer, and can well intercept the undissolved fertilizer to the upper part of the filter device, which is convenient for stirring and dissolving and is also very good Solve the problem of undissolved solid fertilizers causing valves and irrigation pipes to block.

Description of drawings

FIG. 1 is a structural diagram of Embodiment 1.

Fig. 2 is a structural diagram of a sand filter in Example 2.

Fig. 3 is a structural diagram of a filter plate in Example 2.

Fig. 4 is a structural diagram of the filter cap in embodiment 2.

Detailed ways

The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and the accompanying drawings. The specific connection methods of each part adopt mature bolts, rivets, welding in the prior art , pasting and other conventional means, no longer described in detail here.

Example 1

With reference to Fig. 1, a specific embodiment of the present invention comprises sand filter 1, centrifugal filter 2 and screen filter 3 that are arranged in series by pipeline 4, the inlet of pipeline 4 is provided with first electromagnetic valve 5, sand filter The inlet and outlet of 1 are respectively provided with a second solenoid valve 6 and a third solenoid valve 7, and a recoil inlet pipe 8 is connected in parallel between the second solenoid valve 6 and the third solenoid valve 7, and the recoil inlet pipe 8 is provided with The fourth electromagnetic valve 9 is provided with a filter plate 10 in the gravel filter 1, and a recoil outlet pipe 11 is arranged above the filter plate 10. An electric valve 12 is installed on the recoil outlet pipe 11. The first electromagnetic valve 5 and the second A reservoir 36 is connected between the two electromagnetic valves 6 through the fifth electromagnetic valve 13, the inlet and outlet of the centrifugal filter 2 are respectively provided with the sixth electromagnetic valve 14 and the seventh electromagnetic valve 15, and the inlet of the centrifugal filter 2 is also provided with There is a first pressure sensor 16, the slag discharge port of the centrifugal filter 2 is provided with an eighth electromagnetic valve 17, the inlet and outlet of the screen filter 3 are respectively provided with a second pressure sensor 18 and a third pressure sensor 19, the pipe 4 A ninth solenoid valve 20 is provided at the outlet, and a tenth solenoid valve 21 is provided at the slag discharge port of the screen filter 3 .

Example 2

Referring to Fig. 2-4, this embodiment is further improved on the basis of embodiment 1. The top of the gravel filter 1 is provided with a fertilizer inlet 22 and a stirring motor 23 , the interior of the gravel filter 1 is provided with a stirring paddle 24 connected to the stirring motor 23 , and the recoil inlet pipe 8 is provided with a circulation motor 25 . A plurality of installation holes 26 are uniformly arranged on the filter plate 10 , a hollow tube 27 is fixed in the installation hole 26 , and a filter cap 28 is arranged on the top of the hollow tube 27 . The filter cap 28 is provided with two mutually parallel annular baffles 29, the inner edge of the annular baffle 29 is provided with an extended plate 30 inclined upward, and a blade 31 is arranged between the two annular baffles 29, and the blade 31 passes through the connecting shaft 32 is connected to the top of hollow tube 27. The vane 31 is provided with a longitudinal through hole 37, the longitudinal through hole 37 runs through the vane 31, the angle between the longitudinal through hole 37 and the connecting shaft 32 is 15°, and a transverse through hole 33 is arranged between the longitudinal through hole 37 and the bottom surface of the vane 31, The transverse through hole 33 and the longitudinal through hole 37 are perpendicular to each other.

A control method of the above-mentioned irrigation water source filtering device, comprising the following steps,

A. Open the ninth solenoid valve 20, the seventh solenoid valve 15, the sixth solenoid valve 14, the third solenoid valve 7 and the second solenoid valve 6 in sequence, open the first solenoid valve 5 when the groundwater source is sufficient, and the groundwater To provide water for irrigation, when the underground water source is not sufficient, open the fifth solenoid valve 13 to provide water for irrigation by the reservoir 36, and close the other valves;

B. Irrigation water is filtered through sand filter 1, centrifugal filter 2 and screen filter 3 in turn, and then enters the downstream equipment;

C. Comparing the data of the second pressure sensor 18 and the third pressure sensor 19, when the pressure difference reaches the threshold value, it indicates that the mesh filter 3 is blocked, at this time, the tenth solenoid valve 21 is opened, and the ninth solenoid valve 20 is closed at the same time , at this time, the irrigation water flowing through the upper two-stage filter flushes the mesh filter 3 and discharges slag;

D, compare the data of the first pressure sensor 16 and the second pressure sensor 18, when the pressure difference reaches the threshold value, it shows that the centrifuge filter 2 is clogged, at this time, the eighth electromagnetic valve 17 is opened, and the seventh electromagnetic valve 15 is closed simultaneously, The irrigation water flowing through the gravel filter 1 flushes the centrifugal filter 2 and discharges slag;

E. When the irrigation is over, the gravel filter 1 needs to be backwashed, the fourth solenoid valve 9 and the electric valve 12 are opened, the second solenoid valve 6 and the sixth solenoid valve 14 are closed, and the irrigation water is discharged from the gravel filter 1 enters to backwash the filter plate 10, and impurities flow out from the backwash outlet pipe 11.

Add fertilizer from the fertilizer port 22 to the gravel filter 1, and the undissolved fertilizer is intercepted by the filter plate 10 on the upper part of the filter plate 10, and the stirring motor 23 drives the stirring paddle 24 to stir until the fertilizer dissolves and can pass through the filter plate 10 to enter To the bottom of the gravel filter 1, close the first solenoid valve 5, the fifth solenoid valve 13 and the sixth solenoid valve 14, open the second solenoid valve 6, the fourth solenoid valve 9 and the third solenoid valve 7, and cycle the motor 25 The fine particles passing through the filter plate 10 are sucked to the upper part of the sand filter 1 and dissolved again.

In addition, a stirring piece 34 is provided on the bottom surface of the stirring paddle 24, and a gap 35 is reserved between the stirring pieces 34, and the included angle between the stirring piece 34 and the bottom surface of the stirring paddle 24 is 45°. The stirring piece 34 can further improve the effect of the stirring paddle 24 on the downward stirring and driving of the water flow, so that the blade 31 in the filter cap 28 can obtain a greater driving force, thereby further improving the filtering and dissolving effect of the filter cap 28 . In addition, the water flow in the vicinity of the stirring blade 34 along with the rotation of the stirring paddle 24 forms a local strong turbulent flow, thereby increasing the dissolution rate of the fertilizer in the water.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It should not be construed as limiting the invention by implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. a kind of iirigation water source filter device, it is characterised in that: including be arranged in series by pipeline (4) sandrock filter (1), Centrifugal filter (2) and well strainer (3), the import of pipeline (4) are provided with the first solenoid valve (5), sandrock filter (1) Inlet and outlet is respectively arranged with second solenoid valve (6) and third solenoid valve (7), second solenoid valve (6) and third solenoid valve (7) Between be also parallel with backflushing water intake pipe (8), the 4th solenoid valve (9) is provided on backflushing water intake pipe (8), in sandrock filter (1) It is provided with filter plate (10), several mounting holes (26) is evenly arranged on the filter plate (10), are fixed in mounting hole (26) Have hollow tube (27), be provided at the top of hollow tube (27) filter cap (28), there are two mutually for setting in the filter cap (28) Parallel ring baffle (29), the inside edge of ring baffle (29) are provided with the extension plate (30) tilted upward, two annulars It is provided between baffle (29) blade (31), blade (31) is connected to the top of hollow tube (27) by connecting shaft (32), described It is provided with recoil outlet pipe (11) above filter plate (10), is equipped with motor-driven valve (12) in recoil outlet pipe (11), the first electricity It is connected with reservoir (36) between magnet valve (5) and second solenoid valve (6) by the 5th solenoid valve (13), centrifugal filter (2) Inlet and outlet is respectively arranged with the 6th solenoid valve (14) and the 7th solenoid valve (15), and the import of centrifugal filter (2) is also set up Have first pressure sensor (16), the slag-drip opening of centrifugal filter (2) is provided with the 8th solenoid valve (17), well strainer (3) Inlet and outlet be respectively arranged with second pressure sensor (18) and third pressure sensor (19), the outlet of pipeline (4) is set It is equipped with the 9th solenoid valve (20), the slag-drip opening of well strainer (3) is provided with the tenth solenoid valve (21).

2. iirigation water source filter device according to claim 1, it is characterised in that: set at the top of the sandrock filter (1) It is equipped with into Fei Kou (22) and stirring motor (23), sandrock filter (1) is internally provided with the stirring being connected with stirring motor (23) Paddle (24) is provided with circulation motor (25) on backflushing water intake pipe (8).

3. iirigation water source filter device according to claim 1, it is characterised in that: be provided with longitudinal direction in the blade (31) Through-hole (37), longitudinal hole (37) penetrating blade (31), longitudinal hole (37) and the angle of connecting shaft (32) are 15 °, Zong Xiangtong It is provided with cross through hole (33) between hole (37) and blade (31) bottom surface, cross through hole (33) and longitudinal hole (37) are mutually hung down Directly.

4. a kind of control method of iirigation water source filter device described in claim 1-3 any one, it is characterised in that: including Following steps,

A, the 9th solenoid valve (20), the 7th solenoid valve (15), the 6th solenoid valve (14), third solenoid valve are successively opened in order (7) and second solenoid valve (6) the first solenoid valve (5), are opened when underground water source abundance, are provided to irrigate with water by underground water, The 5th solenoid valve (13) is opened when underground water source is inadequate and provides water source by reservoir (36) to irrigate, and other valves are closed；

B, after irrigation water passes sequentially through the filtering of sandrock filter (1), centrifugal filter (2) and well strainer (3), enter Upstream device；

C, the data of second pressure sensor (18) and third pressure sensor (19) are compared, when pressure difference reaches threshold value When show that well strainer (3) blocks, at this time open the tenth solenoid valve (21), simultaneously close off the 9th solenoid valve (20), this The irrigation water of the upper two-stage filter of Shi Liujing is rinsed deslagging to well strainer (3)；

D, the data of first pressure sensor (16) and second pressure sensor (18) are compared, when pressure difference reaches threshold value When show that centrifugal filter (2) blocks, at this time open the 8th solenoid valve (17), simultaneously close off the 7th solenoid valve (15), flow Irrigation water through sandrock filter (1) is rinsed deslagging to centrifugal filter (2)；

E, it needs to backwash sandrock filter (1) after irrigation, opens the 4th solenoid valve (9) and motor-driven valve (12), Second solenoid valve (6) and the 6th solenoid valve (14) are closed, irrigation water enters from the bottom of sandrock filter (1) to filtering at this time Plate (10) is backwashed, and impurity is flowed out from recoil outlet pipe (11).

5. the control method of iirigation water source filter device according to claim 4, it is characterised in that: from add fertile mouth (22) to Sandrock filter (1) plus fertilizer, undissolved fertilizer are intercepted by filter plate (10) in the top of filter plate (10), stirring motor (23) it drives agitating paddle (24) to be stirred, filter plate (10) could be passed through after fertilizer dissolution and enter sandrock filter (1) bottom, closing the first solenoid valve (5), the 5th solenoid valve (13) and the 6th solenoid valve (14), opening second solenoid valve (6), 4th solenoid valve (9) and third solenoid valve (7), circulation motor (25) to be pumped to sand by the fine particle of filter plate (10) It dissolves again on the top of stone filter (1).