CN219964137U - Automatic backflushing filtration system for agricultural irrigation - Google Patents

Abstract

The utility model provides an automatic backflushing filtering system for agricultural irrigation, which is characterized in that an external water source is introduced into the automatic backflushing filtering system through a water inlet pipe, the system is automatically switched into a filtering state through a switching device controlled by a controller, at the moment, the external water source enters a filter pipe through a control valve and then enters a filter, the external water source is filtered by the filter and then transported to the rear end for agricultural irrigation, when the filter needs to be washed, the system is automatically switched into the backflushing state through the switching device controlled by the controller, the filter is washed by the reverse water supply at the rear end of the filter, sewage generated after washing enters the control valve through the filter pipe and then is discharged out of the system through a drain pipe, so that the automatic switching of two working states of filtration and backflushing is realized, the manpower is saved, and the efficiency is improved.

Description

Automatic backflushing filtration system for agricultural irrigation

Technical Field

The utility model relates to the field of agricultural irrigation, in particular to an automatic backflushing and filtering system for agricultural irrigation.

Background

Agricultural irrigation mainly refers to irrigation operation performed on agricultural cultivation areas. The agricultural irrigation filter is used for filtering impurities in a water source, and ensures that downstream irrigation devices such as pressure compensation drippers, spray heads and the like can receive a purer water source, so that the irrigation devices are prevented from being blocked. The filter has more and more impurities and must be cleaned to some extent. The most common filter cleaning method is two modes, namely manual disassembly cleaning; the other is to close the downstream, open the drain, and flush with a water pump. Both cleaning modes are complicated.

There are also backflushing filters used today, i.e. the filter is cleaned by reversing the flow of water through the rear end to the filter. This approach does not allow complete cleaning of the filter, but because it is used in the field of agricultural irrigation, it does not require a high filtering effect, as long as the maintenance time of the filter can be prolonged, so that the agricultural irrigation can still use backflushing filtration. However, the current recoil is manually switched to perform the recoil, and the intelligent automatic recoil cannot be realized. In the prior art, as a back flush filter with the patent publication number of CN210356214U comprises a stainless steel cylinder body and a butterfly valve, wherein two ends of stainless steel are respectively provided with a water inlet and a water outlet, the lower end of the stainless steel cylinder body is provided with a drain valve, the water inlet is provided with a stainless steel composite filter screen, the valve clack of the butterfly valve is arranged in the stainless steel composite filter screen, the other end of the stainless steel composite filter screen is welded with the drain valve, the stainless steel composite filter screen is of a hollow round table reticular structure, an auxiliary cleaning mechanism is further arranged in the middle of the stainless steel composite filter screen, the structure is simple, the production cost is reduced, and the cleaning effect is good. However, the novel switching of the two working states of filtering and backflushing requires manual switching of different valves, is inconvenient to operate, and cannot realize automatic switching of filtering or backflushing.

Disclosure of Invention

Therefore, an automatic backflushing filtering system for agricultural irrigation is needed, and the problems that in the prior art, different valves are required to be manually opened and closed for switching the two working states of filtering and backflushing, the operation is inconvenient, and the automatic switching filtering or backflushing cannot be realized are solved.

In order to achieve the above purpose, the utility model provides an automatic backflushing filtration system for agricultural irrigation, which comprises a switching device, a controller, a control valve and a filter; the switching device comprises an electric transmission unit, a wane structure, a first pressing block, a second pressing block, a first pipeline, a second pipeline and a third pipeline, wherein the first pipeline, the second pipeline and the third pipeline are all communicated with a cavity in the switching device, the first pressing block is arranged at a port of the first pipeline, the second pressing block is arranged at a port of the second pipeline, the electric transmission unit is electrically connected with the controller, and the electric transmission unit drives the wane structure to rotate and push the first pressing block to press and block the first pipeline or the second pressing block to press and block the second pipeline; the control valve comprises a valve body, a water inlet pipe, a filter pipe and a drain pipe, wherein the water inlet pipe, the filter pipe and the drain pipe are respectively arranged at the bottom end of the valve body; the third pipeline is connected with the control end of the valve body, the water inlet pipe is communicated with the second pipeline, the sewage draining pipe is communicated with the first pipeline, and the filter pipe is communicated with the filter; the valve body is communicated with the water inlet pipe or the sewage discharge pipe through water flowing in and out of the control end, so that the filter pipe is controlled to be respectively and independently communicated with the water inlet pipe or the sewage discharge pipe.

Further, the device also comprises an elastic membrane, wherein the elastic membrane is arranged in the cavity of the switching device and is arranged between the first pressing block and the second pressing block and between the first pipeline and the second pipeline.

Further, the elastic membrane further comprises a thick pressing part, wherein the thick pressing part is arranged on the elastic membrane and is positioned right below the first pressing block and right below the second pressing block.

Further, the rocker structure comprises a frame and a rotating assembly, and an eccentric shaft piece is arranged at the output end of the electric transmission unit; a baffle part is arranged on the inner side of the upper border of the frame; the two rotating assemblies are arranged, wherein the left part of one rotating assembly abuts against the left side frame of the frame, the right side of the right part of the rotating assembly abuts against the baffle part, and the left side of the right part of the rotating assembly abuts against the eccentric shaft part; the other rotating component is symmetrically arranged.

Further, the frame is of a trapezoid structure with a narrow upper part and a wide lower part.

Further, the device also comprises a hand control, a groove is formed in the upper portion of the rocker structure, the bottom end of the hand control is arranged in the groove, and the rocker structure is pushed to rotate by rotating or moving the hand control.

Further, the switching device further comprises a base and a base, the electric transmission unit, the rocker structure, the first pressing block and the second pressing block are respectively arranged on the base, the first pipeline, the second pipeline and the third pipeline are respectively arranged on the base, and the bottom of the base is connected with the top of the base.

Further, the bottom of the base is detachably connected with the top of the base.

Further, the control valve further comprises a control cavity, a piston cavity, a control diaphragm and a piston structure, wherein the control cavity is formed by enclosing the top of the valve body with the piston diaphragm in the valve body, the control end of the valve body is arranged at the top of the valve body, the control cavity is communicated with the third pipeline through the control end, the piston cavity is arranged inside the valve body, the bottom end of the piston cavity is communicated with the water inlet pipe, one side end of the piston cavity is communicated with the filter pipe, the upper end of the piston cavity is communicated with the inside of the valve body, and the drain pipe is communicated with the inside of the valve body.

Compared with the prior art, the technical scheme is characterized in that an external water source is introduced into an automatic backflushing filtering system through a water inlet pipe, the system is automatically switched into a filtering state through a controller control switching device, at the moment, the external water source enters a filter pipe through a control valve and then enters a filter, the external water source is filtered by the filter and then transported to the rear end for agricultural irrigation, when the filter needs to be washed, the system is automatically switched into the backflushing state through the controller control switching device, the filter is washed by the reverse water supply at the rear end of the filter, sewage generated after washing enters the control valve through the filter pipe, and then the sewage is discharged out of the system through a sewage drain pipe. The automatic switching of the two working states of filtering and backflushing is realized through the controller, so that the labor is saved, and the efficiency is improved. The controller can intermittently start the backflushing function at regular time to realize unmanned automatic backflushing filtration.

Drawings

FIG. 1 is a front cross-sectional view of a switching device according to an embodiment;

FIG. 2 is a left side view of the switching device according to the embodiment;

FIG. 3 is a cross-sectional view of the switching device of the embodiment in which the first and third lines are in communication;

FIG. 4 is a bottom perspective view of a switching device according to an embodiment;

FIG. 5 is a schematic view of the structure of the control valve according to the embodiment in which the water inlet pipe and the filter pipe are connected;

FIG. 6 is a schematic view of a structure of the control valve in which the drain pipe and the filter pipe are connected;

FIG. 7 is a schematic view of a portion of an agricultural irrigation automatic backflushing filtration system according to an embodiment;

fig. 8 is a cross-sectional view of another embodiment of a switching device.

Reference numerals illustrate:

10. a switching device; 101. an electric transmission unit; 102. a rocker structure; 1021. a frame; 1022. a rotating assembly; 1011. an eccentric shaft member; 1023. a barrier section; 103. a first briquette; 104. a second briquetting; 105. a first pipeline; 106. a second pipeline; 107. a third pipeline; 108. a capacitor;

20. a controller; 301. a valve body; 302. a water inlet pipe; 303. a filter tube; 304. a blow-down pipe; 305. a control end; 307. a control chamber; 308. a piston chamber; 309. a control diaphragm; 310. a piston structure;

30. a control valve;

40. a filter;

50. a hand control;

506. a groove;

60. a base;

70. a base;

80. an elastic membrane; 801. and a thick pressing part.

Detailed Description

In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment may be combined in any manner to form a corresponding implementable technical solution.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present utility model pertains; the use of related terms herein is for the purpose of describing particular embodiments only and is not intended to limit the utility model.

In the description of the present utility model, the term "and/or" is a representation for describing logical relationships between objects, which means that three relationships may exist, e.g., a and/or B, representing: there are three cases, a, B, and both a and B. In addition, the character "/" herein generally indicates that the context associated object is a logical relationship of a type "or".

In the present utility model, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, order, or sequence of such entities or operations.

Without further limitation, the use of the terms "comprising," "including," "having," or other like terms in this specification is intended to cover a non-exclusive inclusion, such that a process, method, or article of manufacture that comprises a list of elements does not include additional elements but may include other elements not expressly listed or inherent to such process, method, or article of manufacture.

As in the understanding of "review guidelines," the expressions "greater than", "less than", "exceeding" and the like are understood to exclude this number in the present utility model; the expressions "above", "below", "within" and the like are understood to include this number. Furthermore, in the description of embodiments of the present utility model, the meaning of "a plurality of" is two or more (including two), and similarly, the expression "a plurality of" is also to be understood as such, for example, "a plurality of" and the like, unless specifically defined otherwise.

In the description of embodiments of the present utility model, spatially relative terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," etc., are used herein as a basis for the description of the embodiments or as a basis for the description of the embodiments, and are not intended to indicate or imply that the devices or components referred to must have a particular position, a particular orientation, or be configured or operated in a particular orientation and therefore should not be construed as limiting the embodiments of the present utility model.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "affixed," "disposed," and the like as used in the description of embodiments of the utility model should be construed broadly. For example, the "connection" may be a fixed connection, a detachable connection, or an integral arrangement; the device can be mechanically connected, electrically connected and communicated; it can be directly connected or indirectly connected through an intermediate medium; which may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the embodiments of the present utility model can be understood by those skilled in the art to which the present utility model pertains according to circumstances.

Referring to fig. 1 to 8, the present embodiment provides an automatic backflushing filtration system for agricultural irrigation, comprising a switching device 10, a controller 20, a control valve 30, and a filter 40; the switching device 10 is used to switch a system state, such as a filter state or a recoil state. The switching device 10 comprises an electric transmission unit 101, a rocker structure 102, a first pressing block 103, a second pressing block 104, a first pipeline 105, a second pipeline 106 and a third pipeline 107, wherein the electric transmission unit 101 can be a traction electromagnet, and a motor, particularly a control motor such as a brushless direct current motor, a stepping motor, a servo motor, a torque motor or a switched reluctance motor is preferably used. The first pipeline 105, the second pipeline 106 and the third pipeline 107 are all communicated with the cavity in the switching device 10, the first pressing block 103 is arranged at the port of the first pipeline 105, the second pressing block 104 is arranged at the port of the second pipeline 106, the electric transmission unit 101 is electrically connected with the controller 20, the controller 20 controls the electric transmission unit 101 to perform transmission action, the electric transmission unit 101 drives the rocker structure 102 to rotate and pushes the first pressing block 103 to press and block the first pipeline 105 or the second pressing block 104 to press and block the second pipeline 106, and when the rocker structure 102 rotates, the rotating shaft of the rocker structure 102 is positioned at the bottom or the top of the rocker structure 102, two sides of the structure move reversely, and as the first pressing block 103 and the second pressing block 104 are positioned at the same side of the rocker structure 102, one side of the movement of the pressing block 103 and the second pressing block 104 can only be pushed. The switching device 10 may be powered externally (by the controller 20) or powered by a built-in battery, capacitor 108, driving the electric drive unit 101. The controller can be a single chip microcomputer or a PLC (programmable logic controller) and the like, so long as the driving of the motor can be realized.

The control valve 30 comprises a valve body 301, a water inlet pipe 302, a filter pipe 303 and a drain pipe 304, wherein the water inlet pipe 302, the filter pipe 303 and the drain pipe 304 are respectively arranged at the bottom end of the valve body 301; the third pipeline 107 is connected with the control end 305 of the valve body 301, the water inlet pipe 302 is communicated with the second pipeline 106, the sewage draining pipe 304 is communicated with the first pipeline 105, and the filtering pipe 303 is communicated with the filter 40; the valve body 301 controls the water flow from and to the control end 305, so as to control the filter pipe 303 to be respectively and independently communicated with the water inlet pipe 302 or the sewage discharge pipe 304.

Referring to fig. 5 and 6, the embodiment of the control valve 30 may further include a control chamber 307, a piston chamber 308, a control diaphragm 309, and a piston structure 310, where the control chamber 307 is formed by enclosing the top of the valve body 301 with the piston diaphragm inside, the control end 305 of the valve body 301 may be disposed at the top of the valve body 301, the control chamber 307 is communicated with the third pipeline 107 through the control end 305, the piston chamber 308 is disposed inside the valve body 301, the bottom end of the piston chamber 308 is communicated with the water inlet pipe 302, one side end of the piston chamber 308 is communicated with the filter pipe 303, the upper end of the piston chamber 308 is communicated with the inside of the valve body 301, and the drain pipe 304 is communicated with the inside of the valve body 301. The upper end of the piston structure 310 is connected to the control diaphragm 309, and the lower end is disposed in the piston chamber 308. When the control chamber 307 is a cavity, the piston structure 310 is pushed up by the water in the water inlet pipe 302 and blocks the upper end of the piston chamber 308 so that water can flow from the water inlet pipe 302 to the filter pipe 303; when the control chamber 307 is filled with sufficient water, the control diaphragm 309 under the influence of water pressure pushes the piston structure 310 down until the inlet pipe 302 is blocked, allowing water to flow from the filter pipe 303 to the drain pipe 304. The calibers of the water inlet pipe 302, the filter pipe 303 and the drain pipe 304 are larger than those of the first pipeline 105, the second pipeline 106 and the third pipeline 107. Thereby realizing that the control valve 30 controls the filter pipe 303 to be respectively and independently communicated with the water inlet pipe 302 or the sewage discharge pipe 304.

In this embodiment, the switching device 10 is matched with the control valve 30 to realize the switching between the two working states of filtering and backflushing. Specifically, referring to fig. 3, when the system is switched to the filtration state, the rocker structure 102 rotates clockwise, the rocker structure 102 pushes the second pressing block 104 to block the second pipeline 106, at this time, the first pipeline 105 and the third pipeline 107 in the cavity are communicated, that is, the control cavity 307 is communicated with the sewage pipe, and water in the control cavity 307 sequentially passes through the third pipeline 107, the sealing cavity and the first pipeline 105 to enter the sewage pipe 304 under the combined action of the siphon effect and the pressure of the water in the water inlet pipe 302 to the piston structure 310, that is, the water in the control cavity 307 is drained, at this time, the piston structure 310 ascends to block the upper end of the piston cavity 308, the water inlet pipe 302 is independently communicated with the filter pipe 303, and the water flows from the water inlet pipe 302 to the filter pipe 303 and enters the filter 40, thereby realizing the filtration function. When the system is switched to a backflushing state (the rocker structure is rotated anticlockwise with reference to fig. 3), the rocker structure 102 rotates anticlockwise, the rocker structure 102 pushes the first pressing block 103 to press and block the first pipeline 105, at this time, the second pipeline 106 and the third pipeline 107 in the cavity are communicated, that is, the control cavity 307 is communicated with the water inlet pipe 302, because the caliber of the water inlet pipe 302 is larger than that of the control end 305, water can be filled into the control cavity 307 under the action of water pressure, when the control cavity 307 is filled with enough water, the control membrane 309 pushes the piston structure 310 to move downwards under the action of water pressure until the water inlet pipe 302 is blocked, the water at the rear end of the filter 40 reversely flows into the filter 40, and dirt on the filter 40 is flushed from inside to outside to form sewage, and the sewage sequentially passes through the filter pipe 303, the piston cavity 308 and 301 and enters the sewage drain pipe 304, so that a reverse flushing function is realized.

The utility model discloses a leading-in automatic recoil filtration system of external water source, control auto-switch for filtration state with the system through controller 20 control auto-switch 10, external water source gets into filter tube 303 through control valve 30, get into filter 40 afterwards, filter 40 filters the back and transmits to the rear end and carry out agricultural irrigation, when filter 40 needs to wash, control auto-switch for the recoil state with the system through controller 20 control auto-switch 10, wash filter 40 by filter 40 rear end back water supply, the sewage that produces after the washing gets into control valve 30 through filter tube 303, discharge the system through blow off pipe 304 afterwards, realize the auto-switch of filtering and recoil two kinds of operating conditions from this, save the manpower, raise the efficiency.

In practical use, because the contact between the first pressing block 103 and the port of the first pipeline 105 (the port of the second pressing block 104 and the port of the second pipeline 106 are the same), and the situation that the first pressing block 103 is inclined to cause the blocking cannot be performed may be difficult to achieve, in some embodiments, the switching device further includes the elastic membrane 80, where the elastic membrane 80 is disposed in the cavity of the switching device 10, and disposed between the first pressing block 103, the second pressing block 104, the first pipeline 105 and the second pipeline 106, and when the first pressing block 103 moves towards the direction of the first pipeline 105, the elastic membrane 80 is pushed, and because the elastic membrane 80 has a certain elastic force, the pushing action of the first pressing block 103 can be completely attached to the port of the first pipeline 105, so that the blocking of the port of the first pressing block 103 to the first pipeline 105 is more stable, and stable switching of the switching device 10 is ensured. Further, the elastic membrane 80 further includes a thick pressing portion 801, where the thick pressing portion 801 is disposed on the elastic membrane 80 and is located under the first pressing block 103 and under the second pressing block 104, and the thick pressing portion 801 may be formed by sticking an elastic block in a corresponding area or directly increasing the thickness, and when the first pressing block 103 moves toward the port of the first pipeline 105, the thick pressing portion 801 is pushed, and because the thickness of the thick pressing portion 801 is increased, the thick pressing portion 801 contacts the port and provides greater deformation lamination in a shorter movement stroke, so that the blocking stability is further improved, and the switching stability of the switching device 10 is provided.

In some embodiments, the rocker structure 102 includes a frame 1021 and a rotating component 1022, an output end of the electric transmission unit 101 is provided with an eccentric shaft member 1011, the electric transmission unit 101 is preferably a motor, the eccentric shaft member 1011 is driven by the motor to rotate around a transmission shaft of the motor, and a rotation shaft of the frame 1021 is disposed on a central vertical line of the lower frame, preferably in a middle portion of the lower frame of the frame 1021, so that when the frame 1021 rotates clockwise or anticlockwise, the first pressing block 103 or the second pressing block 104 can be respectively pushed alone. A baffle 1023 is arranged on the inner side of the upper border of the frame 1021; the rotating components 1022 have two, wherein the left part of one rotating component 1022 is propped against the left side frame of the frame 1021, the right side of the right part of the rotating component 1022 is propped against the baffle 1023, and the left side is propped against the eccentric shaft 1011; the other of the rotating assemblies 1022 is symmetrically disposed. As shown in fig. 3, when the eccentric shaft 1011 moves on the left semicircle of the path, only the right rotating component 1022 is pushed, the right rotating component 1022 drives the frame 1021 to rotate clockwise, when the eccentric shaft 1011 moves on the right semicircle of the path, only the left rotating component 1022 is pushed, the left rotating component 1022 drives the frame 1021 to rotate counterclockwise, so as to control the rotation direction of the rocker structure 102 by the electric transmission unit 101, further control the movement of the first pressing block 103 or the second pressing block 104, realize the conduction of the first pipeline 105 and the third pipeline 107 or the second pipeline 106 and the third pipeline 107, realize the conduction of the water inlet pipe 302 and the filter pipe 303 or the filter pipe 303 and the sewage drain pipe 304 in the control valve 30, and realize the switching between two working states of system filtration and backflushing. Preferably, the frame 1021 has a trapezoid structure with a narrow upper part and a wide lower part, and the structure is simple, and the frame 1021 can stably push the first pressing block 103 or the second pressing block 104 to move.

In some embodiments, as shown in fig. 8, the device further comprises a hand control 50, a groove 506 is arranged at the upper part of the rocker structure 102, the bottom end of the hand control 50 is arranged in the groove 506, and the rocker structure 102 is pushed to rotate by rotating or moving the hand control 50, so that a manual control mode is provided, and the control of the system is prevented from being lost under the condition of power failure.

In some embodiments, as shown in fig. 1-4, the switching device 10 further includes a base 60 and a base 70, the electric transmission unit 101, the rocker structure 102, the first pressing block 103 and the second pressing block 104 are respectively disposed on the base 60, the first pipeline 105, the second pipeline 106 and the third pipeline 107 are respectively disposed on the base 70, and the bottom of the base 60 is detachably assembled with the top of the base 70. Preferably, the removable assembly connection is a bolted connection. The production and the assembly are convenient, the production efficiency is improved, and the cost of later maintenance and repair is reduced.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solutions directly or indirectly to other relevant technical fields, all of which are included in the scope of protection of the present patent.

Claims (9)

1. An automatic backflushing filtration system for agricultural irrigation, which is characterized in that: comprises a switching device, a controller, a control valve and a filter;

the switching device comprises an electric transmission unit, a wane structure, a first pressing block, a second pressing block, a first pipeline, a second pipeline and a third pipeline, wherein the first pipeline, the second pipeline and the third pipeline are all communicated with a cavity in the switching device, the first pressing block is arranged at a port of the first pipeline, the second pressing block is arranged at a port of the second pipeline, the electric transmission unit is electrically connected with the controller, and the electric transmission unit drives the wane structure to rotate and push the first pressing block to press and block the first pipeline or the second pressing block to press and block the second pipeline;

the control valve comprises a valve body, a water inlet pipe, a filter pipe and a drain pipe, wherein the water inlet pipe, the filter pipe and the drain pipe are respectively arranged at the bottom end of the valve body; the third pipeline is connected with the control end of the valve body, the water inlet pipe is communicated with the second pipeline, the sewage draining pipe is communicated with the first pipeline, and the filter pipe is communicated with the filter; the valve body is communicated with the water inlet pipe or the sewage discharge pipe through water flowing in and out of the control end, so that the filter pipe is controlled to be respectively and independently communicated with the water inlet pipe or the sewage discharge pipe.

2. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 1 wherein: the device also comprises an elastic membrane, wherein the elastic membrane is arranged in the cavity of the switching device and between the first pressing block and the second pressing block and between the first pipeline and the second pipeline.

3. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 2 wherein: the elastic diaphragm further comprises a thick pressing part, wherein the thick pressing part is arranged on the elastic diaphragm and is positioned right below the first pressing block and right below the second pressing block.

4. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 1 wherein: the rocker structure further comprises a frame and a rotating assembly, and an eccentric shaft piece is arranged at the output end of the electric transmission unit; a baffle part is arranged on the inner side of the upper border of the frame; the two rotating assemblies are arranged, wherein the left part of one rotating assembly abuts against the left side frame of the frame, the right side of the right part of the rotating assembly abuts against the baffle part, and the left side of the right part of the rotating assembly abuts against the eccentric shaft part; the other rotating component is symmetrically arranged.

5. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 4 wherein: the frame is of a trapezoid structure with a narrow upper part and a wide lower part.

6. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 1 wherein: still including the hand controlling part, the upper portion of wane structure is provided with the recess, the bottom of hand controlling part set up in the recess, through rotatory or remove the hand controlling part, promote the wane structure is rotatory.

7. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 1 wherein: the switching device further comprises a base and a base, wherein the electric transmission unit, the rocker structure, the first pressing block and the second pressing block are respectively arranged on the base, the first pipeline, the second pipeline and the third pipeline are respectively arranged on the base, and the bottom of the base is connected with the top of the base.

8. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 7 wherein: the bottom of the base is detachably connected with the top of the base.

9. An automatic backflushing filtration system for agricultural irrigation as claimed in claim 1 wherein: the control valve further comprises a control cavity, a piston cavity, a control diaphragm and a piston structure, wherein the control cavity is formed by enclosing the top of the valve body with the piston diaphragm inside, the control end of the valve body is arranged at the top of the valve body, the control cavity is communicated with the third pipeline through the control end, the piston cavity is arranged inside the valve body, the bottom end of the piston cavity is communicated with the water inlet pipe, one side end of the piston cavity is communicated with the filter pipe, the upper end of the piston cavity is communicated with the inside of the valve body, and the drain pipe is communicated with the inside of the valve body.