A backflushing anti-clogging drip tube construction method for drip irrigation operations

Abstract

The application discloses a backwashing anti-clogging drip pipe structure method for drip irrigation operation, and comprises the following steps: S1, manufacturing a pipe body, a separation layer and a plurality of water absorbing line bundles respectively or simultaneously, wherein the separation layer comprises a water absorbing foam layer and two filter layers, and the two filter layers cover two opposite surfaces of the water absorbing foam layer respectively; S2, fixing the pipe body and the separation layer into an integrated whole through a co-extrusion process, fixing the separation layer in the middle part of the pipe body in the axial direction, and dividing the internal space of the pipe body into two different cavities; S3, symmetrically opening two through holes at each position of the pipe body where water supply is needed, and each through hole is opened at the position of the water absorbing foam layer; and S4, installing a water absorbing line bundle at each two through holes, and each water absorbing line bundle passes through the corresponding two through holes, so that the two ends of each water absorbing line bundle are located outside the pipe body, and the middle part is fixed in the water absorbing foam layer in the pipe body.

Description

Technical Field

[0001] This invention relates to the field of water-saving irrigation technology, and in particular to a method for constructing a backflushing and anti-clogging drip irrigation pipe for drip irrigation operations. Background Technology

[0002] Drip irrigation, as one of the micro-irrigation technologies, is currently a relatively water-saving irrigation method. Compared with furrow irrigation, it can save more than 90% of water. When combined with an integrated water and fertilizer device, it can accurately apply water and nutrients to the roots of crops, achieving the effects of water saving and increased yield and income. Therefore, its application in facility agriculture, horticulture, urban green landscape and desert greening is becoming increasingly widespread.

[0003] However, the existing drip irrigation pipeline structure has poor anti-clogging performance. During use, the water emitters in the drip pipes are often clogged due to inadequate treatment of particulate matter and microorganisms in the water, and it is difficult to restore them. This results in high operating costs and difficult maintenance and management, which has become the primary obstacle to the wider promotion and use of drip irrigation technology.

[0004] While drip irrigation pipes and tapes utilize labyrinth-structured injection-molded emitters, the water output still remains at 2-3 liters per hour. This means the water supply to the soil is primarily gravity-based, which doesn't align with the water requirements of most plants, which rely on capillary action between the soil and roots. This leads to soil compaction, localized salinization, and the need for intermittent, timed system operation. Furthermore, the emitters in drip irrigation pipes and tapes currently require pre-embedding according to crop spacing, resulting in various spacing specifications. This necessitates maintaining multiple specifications in stock during factory production to meet diverse user requirements, leading to substantial inventory and complex product management. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides the following technical solution:

[0006] A method for constructing a backflushing, anti-clogging drip irrigation pipe for drip irrigation operations includes the following steps:

[0007] S1. The tube body, the partition layer and multiple absorbent wire bundles are manufactured separately or simultaneously, wherein the partition layer includes an absorbent foam layer and two filter layers, and the two filter layers cover the two opposite surfaces of the absorbent foam layer respectively.

[0008] S2. Through co-extrusion process, the tube body and the partition layer are fixed together, and the partition layer is fixed axially in the middle of the tube body, and the internal space of the tube body is divided into two different cavities;

[0009] S3. Two through holes are symmetrically opened at each location on the pipe body where water needs to be supplied, and each through hole is opened at the location of the water-absorbing foam layer.

[0010] S4. Install a water-absorbing wire bundle at every two through holes. Each water-absorbing wire bundle passes through the corresponding two through holes, so that both ends of each water-absorbing wire bundle are outside the tube and the middle is fixed in the water-absorbing foam layer inside the tube.

[0011] In some embodiments, after step S4, the method further includes:

[0012] S5. During operation, water is supplied to the pipe body through external equipment, and the system switches between normal water supply mode and backwashing mode as needed.

[0013] In normal water supply mode, the water pressure in the two cavities of the pipe is the same;

[0014] In backwash mode, the water pressure in one chamber is lower than that in another chamber, thereby backwashing the filter layer corresponding to the chamber with lower water pressure.

[0015] In some embodiments, in step S5, before starting work, a valve is installed at each end of the pipe body;

[0016] Each valve includes a valve body and a valve core and a baffle plate installed inside the valve body;

[0017] The baffle plate is fixedly installed in the middle of the valve body facing one end of the pipe body, and the baffle plate is fixedly connected to the partition layer inside the pipe body.

[0018] The baffle plate is used to divide the water outlet of the valve near the pipe body into two parts, which are respectively connected to two cavities inside the pipe body.

[0019] The valve core can rotate within a certain range within the valve body, thereby enabling the valve to switch between open, closed, and partially open states.

[0020] Among them, the open state means that both water inlets at the end of the valve closest to the pipe are open, the closed state means that both water inlets are closed, and the half-open state means that one water inlet is open while the other water inlet is closed.

[0021] In some embodiments, during operation in step S5, one valve is connected to the water inlet and the other valve is connected to the water outlet, and the switching between the normal water supply mode and the backwashing mode is achieved in the following manner.

[0022] In normal water supply mode, the valve at the inlet end is in the open state, and the valve at the outlet end is in the closed state, so that water enters the two cavities in the pipe body simultaneously.

[0023] In backwash mode, both the inlet and outlet valves are in a half-open state, and the open water inlets of the two valves face opposite directions, so that only one chamber in the pipe is filled with water and the other chamber is filled with water. A water pressure difference appears between the two chambers, thus achieving backwashing.

[0024] In some embodiments, in step S5, the valve core is a cylindrical or spherical structure with a through hole in the middle, and the through hole of the valve core is a double horn shape that is narrow in the middle and wide at both ends. The valve core can drive its through hole to rotate in the valve body to achieve switching between different states.

[0025] The water-proof plate has a groove in the middle of one end facing the pipe body, and the size of the groove corresponds to the size of the partition layer.

[0026] When assembling valves at the ends of the pipe, the connection between the pipe and the valve ends is sealed, and the ends of some partitions in the pipe are embedded in the grooves in the middle of the baffle plate, thereby achieving a tight connection between the baffle plate and the partition layer.

[0027] In some embodiments, in step S1, the pipe body is made of PE pipe, the filter layer is made of micro-nano porous material, the water-absorbing wire bundle is made of hydrophilic fiber material, and the water-absorbing foam layer is made of open-cell foam.

[0028] In some embodiments, in step S1, the separator layer is generally thick at both ends and thin in the middle.

[0029] In some embodiments, in step S1, the length of the absorbent wire bundle is 10-50 mm and the diameter is 2-6 mm; the diameter of the tube is 16-20 mm and the wall thickness is 0.5-2 mm; the thickness of the separator layer at both ends is 7-9 mm and the thickness in the middle is 5-7 mm.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] The backwashing and anti-clogging drip irrigation pipe construction method provided by this invention can save water resources, improve the stability and ease of operation of the micro-irrigation system, and adaptively adjust the water supply according to plant and soil conditions. It can also be manufactured in real-time according to the required plant spacing, better promoting crop growth. Furthermore, by dividing the internal space of the pipe into two different cavities, a water pressure difference between the two cavities can be maintained during use to backwash the filter layer, greatly improving the anti-clogging performance of the drip irrigation pipe, enhancing its effectiveness, and reducing system cost and maintenance costs. Simultaneously, the factory can separate pipe production and absorbent wire harness installation into two separate processes. The pipe manufacturing stage does not need to consider the absorbent wire harness position based on plant spacing, resulting in a universal specification. The absorbent wire harness installation can be completed separately according to the user's specific order or on-site, greatly reducing the factory's inventory of different specifications and improving factory efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic flowchart illustrating the backwashing and anti-clogging drip tube construction method for drip irrigation operations provided by the present invention.

[0033] Figure 2 This is a schematic diagram of the radial cross-section of the tube.

[0034] Figure 3 for Figure 2 A schematic diagram of the axial section corresponding to CC;

[0035] Figure 4 This is a schematic diagram showing the connection between a pipe and a valve.

[0036] Figures 5a-5c This is a schematic diagram illustrating the principles under different working modes.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Pipe body; 2. Filter layer; 3. Water absorption harness; 4. Water absorption foam layer; 5. Valve; 51. Valve body; 52. Valve core; 53. Water baffle plate. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following description, in conjunction with the accompanying drawings and specific embodiments, further explains how this invention is implemented.

[0040] Reference Figures 1-3 As shown, the present invention provides a method for constructing a backflushing anti-clogging drip irrigation pipe for drip irrigation operations, comprising the following steps:

[0041] S1. The tube body 1, the partition layer and multiple absorbent wire bundles 3 are manufactured separately or simultaneously, wherein the partition layer includes an absorbent foam layer 4 and two filter layers 2, and the two filter layers 2 respectively cover the two opposite surfaces of the absorbent foam layer 4.

[0042] S2. Through co-extrusion process, the tube body 1 and the partition layer are fixed together, and the partition layer is fixed axially in the middle of the tube body 1, and the internal space of the tube body 1 is divided into two different cavities.

[0043] S3. Two through holes are symmetrically opened at each location on the pipe body 1 where water needs to be supplied, and each through hole is opened at the location of the water-absorbing foam layer 4.

[0044] S4. Install a water-absorbing wire bundle 3 at every two through holes. Each water-absorbing wire bundle 3 passes through the corresponding two through holes, so that both ends of each water-absorbing wire bundle 3 are located outside the tube body 1, and the middle is fixed in the water-absorbing foam layer 4 inside the tube body 1.

[0045] Understandably, this was done to facilitate the demonstration of the structure of tube 1. Figure 2 and Figure 3 In the middle, the tube body 1 is divided into upper and lower parts; in actual use, the tube body 1 does not necessarily have to be set as upper and lower parts as shown in the figure, it can also be set as left and right parts, or tilted, all of which will not affect its normal use.

[0046] Furthermore, after step S4, the following steps are also included:

[0047] S5. During operation, water is supplied to the pipe body 1 through external equipment, and the system switches between normal water supply mode and backwashing mode as needed. In normal water supply mode, the water pressure in the two chambers of the pipe body 1 is the same. In backwashing mode, the water pressure in one chamber is lower than the water pressure in the other chamber, thereby backwashing the filter layer 2 corresponding to the chamber with lower water pressure.

[0048] Reference Figure 3 As shown, if the pressure F of the water flow in the upper part... A With the pressure F of the lower part B Different pressures can create a pressure differential, thereby backwashing the impurities deposited on the surface of filter layer 2 and preventing filter layer 2 from becoming clogged.

[0049] Preferably, refer to Figure 4As shown, in step S5, before starting work, a valve 5 is installed at each end of the pipe body 1. Each valve 5 includes a valve body 51, a valve core 52 installed in the valve body 51, and a water-separating plate 53. The water-separating plate 53 is fixedly installed in the middle of the valve body 51 facing the end of the pipe body 1, and the water-separating plate 53 is fixedly connected to the partition layer inside the pipe body 1. The water-separating plate 53 is used to divide the water outlet of the valve 5 near the end of the pipe body 1 into two parts, which are respectively connected to two cavities inside the pipe body 1. The valve core 52 can rotate within a certain range inside the valve body 51, so that the valve 5 can switch between open, closed, and half-open states. The open state means that both water outlets of the valve 5 near the end of the pipe body 1 are open, the closed state means that both water outlets are closed, and the half-open state means that one water outlet is open while the other water outlet is closed.

[0050] Furthermore, in step S5, during operation, one valve 5 is connected to the water inlet and the other valve 5 is connected to the water outlet, and the switching between the normal water supply mode and the backwashing mode is achieved in the following manner.

[0051] In normal water supply mode, valve 5 at the inlet end is in the open state and valve 5 at the outlet end is in the closed state, so that water enters the two cavities in the pipe body 1 simultaneously.

[0052] In backwash mode, both valve 5 at the inlet and outlet are in a half-open state, and the openings of the two valves 5 face opposite directions, so that only one chamber in the pipe body 1 receives water and the other chamber receives water, creating a water pressure difference between the two chambers to achieve backwashing.

[0053] Preferably, in step S5, the valve core 52 is a cylindrical or spherical structure with a through hole in the middle, and the through hole of the valve core 52 is a double trumpet shape that is narrow in the middle and wide at both ends. The valve core 52 can drive its through hole to rotate in the valve body 51 to achieve switching between different states. The water baffle 53 has a groove in the middle of the end facing the pipe body 1, and the size of the groove corresponds to the size of the partition layer. When the valve 5 is installed at the end of the pipe body 1, the end connection between the pipe body 1 and the valve 5 is sealed, and the end of part of the partition layer in the pipe body 1 is embedded in the groove in the middle of the water baffle 53, thereby achieving a tight connection between the water baffle 53 and the partition layer.

[0054] exist Figure 4 In the illustrated embodiment, the valve core 52 is in Figure 4 The situation shown is the open state; if the valve core 52 rotates 45°, it is in the half-open state, and rotating 45° in different directions corresponds to the half-open state of two different parts; if the valve core 52 rotates 90°, it is in the closed state.

[0055] The working principle of this invention is as follows:

[0056] On one hand, when irrigation water or fertigation liquid medium passes through pipe 1, the micron / nano-scale filter layer 2 blocks particulate matter and microorganisms from entering, preventing blockage below. Meanwhile, small-molecule liquid medium is actively absorbed by the capillary force of the lower absorbent foam layer 4, forming a water-bearing layer within it. This water-bearing layer maintains a controlled moisture level, and the water or liquid medium within it is then slowly and controlled to the outside of pipe 1 via the absorbent bundles 3. The soil and plant roots surrounding the absorbent bundles 3 absorb the seeping water or liquid nutrients through capillary action. When external moisture is sufficient, the capillary pressure difference inside and outside pipe 1 decreases or disappears, temporarily halting the seepage process until the next capillary pressure difference is formed, at which point the seepage and absorption process restarts. This cyclical process achieves the self-adaptive water control effect of pipe 1, maximizing its suitability for plant water and nutrient needs, and effectively conserving water.

[0057] On the other hand, the drip irrigation system is laid in the field, with two valves 5 at both ends of the pipe body 1. One valve 5 is connected to the inlet, and the other valve 5 is connected to the outlet; combined with Figures 5a-5c As shown in the figure, the arrows indicate the direction of water flow. Valve 5 on the left is connected to the water inlet, and valve 5 on the right is connected to the water outlet.

[0058] Figure 5a In the middle, the left valve 5 is open and the right valve 5 is closed, which is the normal water supply mode. Pressurized water flow is formed inside the pipe body 1, and the pressure in the upper and lower cavities is the same. The water flows through the filter layer 2 to the water-absorbing foam layer 4. Through the capillary effect of the water-absorbing bundle 3, the water in the pipe is slowly released to the soil and roots outside the pipe, forming an integrated water supply and absorption system, so that the plants can absorb water as needed.

[0059] Figure 5b In the diagram, valve 5 on the left is half-open, and valve 5 on the right is half-open to the other side, corresponding to the backwashing mode on one side (the upper side in the diagram). After the drip irrigation system has been running for a period of time, dirt accumulates on the surface of filter layer 2, affecting the water output. At this time, you can follow... Figure 5b As shown, adjust the two valves 5 respectively, close the water outlet of the lower cavity of the pipe in the figure, and release the water inlet of the upper cavity to form a water pressure difference. This can backwash away the dirt in the upper filter layer 2 and restore the water permeability of the upper part.

[0060] Figure 5c In the middle, corresponding to the backwashing mode on the other side (the lower side in the diagram), the principle is... Figure 5b The situation is the same as in [the previous case], so I will not repeat it here.

[0061] Therefore, in step S5, this can be achieved by periodically adopting... Figure 5b and Figure 5cThe backwashing mode cleans the inside of the tube 1 to remove solid particles attached to the filter layer 2, preventing the filter layer 2 from clogging and enabling the filter layer 2 to maintain its water filtration performance for a long time and improve its service life.

[0062] In one specific embodiment, in step S1, the pipe body 1 is made of PE pipe, the filter layer 2 is made of micro-nano porous material, the water-absorbing wire bundle 3 is made of hydrophilic fiber material, and the water-absorbing foam layer 4 is made of open-cell foam.

[0063] It is understandable that the pipe body 1, filter layer 2, and absorbent foam layer 4 can be produced using existing co-extrusion processes to achieve a composite pipe structure. This co-extruded pipe is continuously extruded, with no length limitations, determined according to field laying needs, and can significantly reduce production costs and improve production efficiency. During the manufacturing of the separator layer, existing open-cell foaming and wet extrusion processes can be combined to form micron-level permeable pores on the separator layer surface and an open-cell foam structure in the middle of the separator layer, thus forming two filter layers 2 and an intermediate absorbent foam layer 4. The absorbent wire harness 3 can be implanted using conventional wire-planting machinery or manual tools, installed in a suitable position on the pipe body 1. The absorbent wire harness 3 can be made of hydrophilic nylon or polyester fiber material with good aging resistance, tensile strength, and hydrophilicity, offering a long lifespan and good water control effect.

[0064] Preferably, in step S1, the separator layer has a structure that is thick at both ends and thin in the middle.

[0065] In one specific embodiment, in step S1, the length of the water-absorbing bundle 3 is 10-50 mm, and the diameter d is 2-6 mm. The length and diameter d of the water-absorbing bundle 3 can be determined by the water volume requirements of the application environment; the diameter D of the tube body 1 is 16-20 mm, and the tube wall thickness δ is 0.5-2 mm; the thickness W at both ends of the separator layer is 7-9 mm, and the thickness w1 in the middle is 5-7 mm; in addition, the distance L between two adjacent water-absorbing bundles 3 can be determined by the plant spacing of the actual application scenario.

[0066] Traditional drip irrigation pipes or embedded drip tapes must be manufactured and supplied individually according to the plant spacing, requiring large-scale stocking. However, the drip irrigation pipes manufactured by the backwashing and anti-clogging drip irrigation pipe construction method provided by this invention do not depend on the definition of plant spacing in the early stages of production. They can be mass-produced in advance. When in use, according to the customer's needs for plant spacing, the water-absorbing wire bundle 3 is installed onto the pipe body 1 at the location where water is needed, using a separate specialized wire-installing machine or manual tools. This process can be flexibly carried out in the workshop or at the application site, thereby improving production organization efficiency and saving product costs.

[0067] In summary, the backwashing and anti-clogging drip irrigation pipe construction method provided by this invention can save water resources, improve the stability and ease of operation of the micro-irrigation system, and adaptively adjust the water supply according to plant and soil conditions. It can also be manufactured in real time according to the required spacing between plants, which can better promote crop growth. Furthermore, by dividing the internal space of the pipe into two different cavities, a water pressure difference between the two cavities can be maintained during use to backwash the filter layer, greatly improving the anti-clogging performance of the drip irrigation pipe, enhancing the effect of use, and reducing the system cost and maintenance cost.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for constructing a backflushing, anti-clogging drip irrigation pipe for drip irrigation operations, characterized in that, Includes the following steps: S1. The tube body (1), the partition layer and multiple absorbent wire bundles (3) are manufactured separately or simultaneously, wherein the partition layer includes an absorbent foam layer (4) and two filter layers (2), and the two filter layers (2) cover the two opposite surfaces of the absorbent foam layer (4) respectively. S2. Through co-extrusion process, the tube body (1) and the partition layer are fixed together, and the partition layer is fixed in the middle of the tube body (1) along the axial direction, and the internal space of the tube body (1) is divided into two different cavities; S3. Two through holes are symmetrically opened at each location on the pipe body (1) where water needs to be supplied, and each through hole is opened at the location of the water-absorbing foam layer (4). S4. Install a water-absorbing wire bundle (3) at every two through holes. Each water-absorbing wire bundle (3) passes through the corresponding two through holes, so that both ends of each water-absorbing wire bundle (3) are located outside the tube body (1), and the middle part is fixed in the water-absorbing foam layer (4) inside the tube body (1). S5. During operation, water is supplied to the pipe body (1) through external equipment, and the normal water supply mode and backwash mode are switched according to actual needs. Under normal water supply mode, the water pressure in the two cavities inside the pipe (1) is the same; In the backwash mode, the water pressure in one chamber is made lower than the water pressure in the other chamber, so that the filter layer (2) corresponding to the chamber with lower water pressure is backwashed; In step S5, before starting work, a valve (5) is installed at each end of the pipe body (1). Each valve (5) includes a valve body (51) and a valve core (52) and a baffle plate (53) installed in the valve body (51). The baffle plate (53) is fixedly installed in the middle of the valve body (51) facing the pipe body (1), and the baffle plate (53) is fixedly connected to the partition layer inside the pipe body (1). The baffle plate (53) is used to divide the water outlet of the valve (5) near the end of the pipe body (1) into two parts, which are respectively connected to two cavities inside the pipe body (1); The valve core (52) can rotate within a certain range within the valve body (51), thereby enabling the valve (5) to switch between open, closed and half-open states; Among them, the open state means that both water inlets of the valve (5) near the end of the pipe (1) are open, the closed state means that both water inlets are closed, and the half-open state means that one water inlet is open while the other water inlet is closed.

2. The method for constructing a backflushing, anti-clogging drip irrigation pipe for drip irrigation operations according to claim 1, characterized in that, In step S5, during operation, one valve (5) is connected to the inlet and the other valve (5) is connected to the outlet, and the switching between normal water supply mode and backwashing mode is achieved in the following manner. In normal water supply mode, the valve (5) at the inlet end is in the open state and the valve (5) at the outlet end is in the closed state, and water enters the two cavities in the pipe body (1) simultaneously; In the backwash mode, both the valve (5) at the inlet end and the valve (5) at the outlet end are in a half-open state, and the openings of the two valves (5) face opposite directions, so that only one cavity in the pipe body (1) is filled with water and the other cavity is filled with water. A water pressure difference appears between the two cavities, thus achieving backwashing.

3. The method for constructing a backflushing, anti-clogging drip irrigation pipe for drip irrigation operations according to claim 1, characterized in that, In step S5, the valve core (52) is a cylindrical or spherical structure with a through hole in the middle, and the through hole of the valve core (52) is a double horn shape that is narrow in the middle and wide at both ends. The valve core (52) can drive its through hole to rotate in the valve body (51) to achieve switching between different states. The water-blocking plate (53) has a groove in the middle of one end facing the pipe body (1), and the size of the groove corresponds to the size of the partition layer. When the valve (5) is installed at the end of the pipe body (1), the connection between the end of the pipe body (1) and the valve (5) is sealed, and the end of part of the partition in the pipe body (1) is embedded in the groove in the middle of the water-proof plate (53), thereby achieving a tight connection between the water-proof plate (53) and the partition layer.

4. The method for constructing a backflushing and anti-clogging drip irrigation pipe for drip irrigation operations according to claim 1, characterized in that, In step S1, the pipe body (1) is made of PE pipe, the filter layer (2) is made of micro-nano porous material, the water-absorbing wire bundle (3) is made of hydrophilic fiber material, and the water-absorbing foam layer (4) is made of open-cell foam.

5. The method for constructing a backflushing, anti-clogging drip irrigation pipe for drip irrigation operations according to claim 1, characterized in that, In step S1, the separator layer has a structure that is thick at both ends and thin in the middle.

6. The method for constructing a backflushing, anti-clogging drip irrigation pipe for drip irrigation operations according to claim 5, characterized in that, In step S1, the length of the absorbent wire bundle (3) is 10-50mm and the diameter is 2-6mm; the diameter of the tube body (1) is 16-20mm and the tube wall thickness is 0.5-2mm; the thickness of the separator layer at both ends is 7-9mm and the thickness in the middle is 5-7mm.

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