Low-cost drip irrigation film preparation equipment and preparation method thereof

Abstract

The invention relates to the field of drip irrigation agriculture in arid regions, in particular to low-cost drip irrigation film preparation equipment and a preparation method thereof. The preparation equipment is equipment capable of thermally sealing a strip-shaped film (4) and a sheet-shaped film (6) into a comprehensive film which is locally provided with double layers; the equipment comprises a discharging station (1), a heat sealing station (2) and a winding station (7) which are sequentially arranged, a heat sealing piece (3) is also arranged on the heat sealing opening (310); the heat sealing piece (3) comprises a hollow shell (301), and the hollow shell (301) is connected with a hot air inlet (302); the first hot air port (303) and the second hot air port (304) are strip-shaped and face two sides of the strip-shaped film (4); pinholes are formed in the strip-shaped film (4) at intervals; and the rolling station (7) is a roller capable of rolling. The mulching film and the drip irrigation pipe are creatively combined into a whole, and the low-cost drip irrigation pipe is constructed and can play a role in seasons.

Description

Technical Field

[0001] This invention relates to the field of drip irrigation agriculture in arid regions, and more particularly to low-cost drip irrigation film preparation equipment and its preparation method. Background Technology

[0002] In the application of drip irrigation technology in arid regions such as Gansu, there are many prominent drawbacks in the pipeline layout process, which can be explained in detail from the perspectives of pipeline laying methods and system complexity: Multiple problems with ground-laid pipes: The region's climate, characterized by strong sunlight, frequent sandstorms, and concentrated rainfall, exposes pipes to prolonged sun and rain, accelerating material aging and degradation, reducing their actual lifespan to only 1-2 years. Lacking soil support and fixation, the pipes suffer from poor connection stability, especially during sudden pressure changes caused by starting or stopping the irrigation system, making them prone to detachment and leakage. During agricultural operations such as tilling, fertilizing, and weeding, pipes are easily struck and crushed by farm implements, resulting in a high rate of mechanical damage, reaching up to 30%. Furthermore, ground-laid pipes can become obstacles, severely interfering with mechanized operations such as sowing and harvesting, reducing production efficiency.

[0003] Significant drawbacks of buried pipe installation: Once underground, leaks and blockages are difficult to locate quickly, requiring extensive excavation for repairs, which is time-consuming, labor-intensive, and can negatively impact crop growth. It's also impossible to visually monitor soil moisture levels and dripper flow, hindering real-time adjustments to irrigation parameters and potentially leading to uneven irrigation. Insufficient burial depth, especially in sandy soils with loose, well-aerated soil, makes the pipes highly susceptible to damage during subsequent tillage. Furthermore, buried pipe installation is more complex, requiring trench excavation, precise placement, backfilling, and compaction, increasing costs by 20-30% compared to surface laying.

[0004] Drip irrigation systems require contiguous planting areas to achieve efficient water-saving irrigation, but this conflicts with the current decentralized contract farming model prevalent in rural areas. Farmers' plots are scattered, making unified planning and installation difficult. As a key component of drip irrigation systems, capillary tubes must be laid row by row according to the crops during installation, and promptly collected and cleaned after irrigation. The entire process is cumbersome and time-consuming, significantly increasing labor costs and affecting the cost-effectiveness of technology promotion.

[0005] On December 11, 2025, a search was conducted in the China Patent Publication Database using "drip irrigation and membrane and heat sealing and preparation and roller and strip" as the abstract keywords and the option to allow synonym expansion was selected. No relevant literature was found.

[0006] On December 11, 2025, an abstract search was conducted on CNKI (China National Knowledge Infrastructure) for the keywords "drip irrigation and membrane and heat sealing and preparation and roller and strip". No relevant literature was found.

[0007] On December 11, 2025, a search was conducted on the U.S. Patent and Trademark Office website for the term "drip irrigation with film with heat sealing with preparation with roller with strip," but no relevant literature was found; the search URL is https: / / ppubs.uspto.gov / pubwebapp / .

[0008] On December 11, 2025, a search was conducted on WIPO's website https: / / patentscope2.wipo.int / for the term "drip irrigation and film and heat sealing and preparation and roller and strip", but no relevant literature was found.

[0009] On December 11, 2025, a search was conducted on the website of the Japan Patent Office (https: / / www.j-platpat.inpit.go.jp / ) for the term "drip irrigation and film and heat sealing and preparation and roller and strip," but no relevant literature was found. Summary of the Invention

[0010] Purpose of the invention: To provide a more effective and lower-cost drip irrigation film preparation device and its preparation method, the specific purpose of which is described in the several substantial technical effects in the detailed implementation section.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: A low-cost drip irrigation membrane preparation device, characterized in that the device is capable of thermally bonding strip membrane 4 and sheet membrane 6 into a composite membrane that is partially double-layered; The equipment includes a feeding station 1, a heat sealing station 2, and a winding station 7, which are arranged in sequence. There is a tensioning space 5 between the material feeding station 1 and the heat sealing station 2; The material feeding station 1 includes a base 101, on which a fixed seat 102 and a movable seat 105 are arranged, and the movable seat 105 can move left and right; Support rods 106 are arranged on the fixed seat 102 and the movable seat 105, and extrusion plates 107 are arranged on the support rods 106. Two sets of center rods 108 are arranged on the extrusion plates 107. On each extrusion plate 107, the two sets of central rods 108 have a shorter upper one for mounting the film roll 601 and a longer lower one for mounting the strip film roll 401; the longer central rod 108 is located below the shorter central rod 108. The heat sealing station 2 includes a heat sealing port 310, in which two rollers, namely roller 1 307 and roller 2 308, are arranged; between roller 1 307 and roller 2 308 is an extrusion port 309; a heat sealing component 3 is also arranged on the heat sealing port 310. The heat-sealed component 3 includes a hollow shell 301, which has two sets of hot air inlets, namely a first hot air inlet 303 and a second hot air inlet 304. The hollow shell 301 is connected to a hot air inlet 302. The first hot air inlet 303 and the second hot air inlet 304 are both strip-shaped and face the two sides of the strip-shaped membrane 4. The strip-shaped membrane 4 has pinholes arranged at intervals. The winding station 7 is a single roller capable of winding.

[0012] A further technical solution of the present invention is that a support structure 305 is arranged on the heat-sealed part 3, and two extrusion rollers 306 are installed on the support structure 305. The upper surface of the extrusion rollers 306 can contact both sides of the strip film 4 and thus relatively press the strip film 4 and the sheet film 6 together.

[0013] A further technical solution of the present invention is that the winding roller of the winding station 7 can provide tension, which is the power source of the entire system.

[0014] A further technical solution of the present invention is that the bottom of the movable seat 105 includes a threaded block, which is threadedly mounted on the threaded rod 104. The bottom of the movable seat 105 also includes a hole arranged on the track; the threaded rod 104 is poweredly connected to the motor 103.

[0015] A further technical solution of the present invention is that the hot air inlet 302 is connected to a heating fan.

[0016] A further technical solution of the present invention is that the membrane 4 is located in the middle of the sheet membrane 6.

[0017] A low-cost drip irrigation film preparation method, characterized in that it utilizes the low-cost drip irrigation film preparation equipment described in any one of the above claims, characterized in that... First, turn on the motor 103 to move the moving base 105 outwards. Then, load the plastic film roll 601 and the strip film roll 401. Next, move the moving base 105 inwards and position the plastic film roll 601 and the strip film roll 401. The strip film 4 and sheet film 6 are pulled through the extrusion port 309 between roller 1 307 and roller 2 308; and hung on the winding roller of the winding station 7. The heating fan is turned on, and hot air is sprayed out from the first hot air outlet 303 and the second hot air outlet 304 to heat both sides of the strip film roll 401. The motor of the winding roller at the winding station 7 is started, and the heated strip film roll 401 and sheet film 6 are squeezed together. It forms a composite membrane that is locally bilayered.

[0018] A low-cost drip irrigation method for drip irrigation membranes, characterized by using a composite membrane that is partially double-layered, prepared by the method described above; The double-layered part is covered downwards, and a laminating machine is used for lamination. During the lamination process, both sides are pressed firmly. By connecting drip irrigation pipes to the ends of the double-layer section, water will flow between the double membranes, forming a de facto membrane-under-membrane tube, thus achieving drip irrigation.

[0019] A further technical solution of the present invention is a drip irrigation method for a low-cost drip irrigation film, characterized in that some intermediate openings are provided in the middle of the double-layer portion, and the intermediate openings are obliquely inserted between the double-layer film.

[0020] The present invention, employing the above technical solution, offers the following advantages over existing technologies: Fault location is difficult, repairs require large-scale excavation, real-time irrigation monitoring is impossible, insufficient burial depth leads to damage during tilling, and installation is complex and costly. The film-covered pipe of this invention is laid on the soil surface along with the mulch film. Leaks and blockages are directly reflected in the surface moisture level, allowing for rapid fault location. Repairs require only targeted treatment without large-scale excavation, without affecting crop growth. The surface moisture level can be directly observed, enabling real-time adjustment of irrigation parameters to avoid uneven irrigation. The film pipe is integrally fixed with the mulch film, eliminating the need for separate deep trenches and preventing damage during tilling. Installation only requires mulching and compaction using a mulching machine, eliminating complex procedures such as trench excavation and precise placement, significantly reducing costs compared to buried pipe installation. Drip irrigation systems require contiguous, concentrated plots, conflicting with fragmented rural contracting; capillary tubes need to be laid row by row and recycled after irrigation, requiring significant labor input and impacting the cost-effectiveness of technology promotion. The equipment of this invention can flexibly produce localized double-layer films, eliminating the need for farmers to plan contiguous plots. Farmers can lay the film piece by piece using a mulching machine, adapting to decentralized contract farming models. The double-layer portion of the film directly serves as the under-film pipe, eliminating the need for separate row-by-row capillary installations and post-irrigation cleaning, thus saving tedious manual labor, significantly reducing labor costs, and improving the cost-effectiveness of drip irrigation technology promotion. In summary, this patent innovatively combines mulch film and drip irrigation pipe into one, creating a low-cost drip irrigation system that can function effectively in the current season. Attached Figure Description

[0021] To further illustrate the present invention, the following description is provided in conjunction with the accompanying drawings: Figure 1 This is a schematic diagram of the side structure of the invention; Figure 2 This is a structural diagram of the novel partially bilayered thin film of the invention; Figure 3 A three-dimensional diagram of the invention; Figure 4 The structure above the heat sealing station; Figure 5 A three-dimensional diagram of the invention; Figure 6 A three-dimensional diagram of the invention; Figure 7 This is a structural diagram of a remelting tank for recycled plastic film in existing technology. Figure 8 This is a structural diagram of a plastic film production line in the existing technology; Figure 9 and Figure 10 This is a diagram showing the layout and structure of existing drip irrigation pipes. Figure 11 This is a detailed structural diagram of the heating element; Figure 12 This is a structural diagram of the heat-sealed section; Figure 13 This is a schematic diagram of the realization of a bilayer composite membrane; The components are as follows: 1. Feeding station; 2. Heat sealing station; 3. Heat sealing component; 4. Strip film; 5. Tensioning space; 6. Sheet film; 7. Winding station; 101. Base; 102. Fixed seat; 103. Motor; 104. Threaded rod; 105. Moving seat; 106. Support rod; 107. Extrusion plate; 108. Center rod; 401. Strip film roll; 601. Ground film roll; 22. Heat sealing joint; 301. Hollow shell; 302. Hot air inlet; 303. First hot air outlet; 304. Second hot air outlet; 305. Support structure; 306. Extrusion roller; 307. Roller one; 308. Roller two; 309. Extrusion port; 310. Heat sealing joint. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] This patent provides multiple parallel solutions; the different descriptions represent improved solutions or parallel solutions based on the basic solution. Each solution has its own unique characteristics. Furthermore, the technical features involved in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other. Fixing methods not described herein can be any type of fixing, such as threaded fixing, bolt fixing, or adhesive bonding.

[0025] Example 1: Referring to all the accompanying drawings; A low-cost drip irrigation membrane preparation device, characterized in that the device is capable of thermally bonding strip membrane 4 and sheet membrane 6 into a composite membrane that is partially double-layered; The equipment includes a feeding station 1, a heat sealing station 2, and a winding station 7, which are arranged in sequence. There is a tensioning space 5 between the material feeding station 1 and the heat sealing station 2; The material feeding station 1 includes a base 101, on which a fixed seat 102 and a movable seat 105 are arranged, and the movable seat 105 can move left and right; Support rods 106 are arranged on the fixed seat 102 and the movable seat 105, and extrusion plates 107 are arranged on the support rods 106. Two sets of center rods 108 are arranged on the extrusion plates 107. On each extrusion plate 107, the two sets of central rods 108 have a shorter upper one for mounting the film roll 601 and a longer lower one for mounting the strip film roll 401; the longer central rod 108 is located below the shorter central rod 108. The heat sealing station 2 includes a heat sealing port 310, in which two rollers, namely roller 1 307 and roller 2 308, are arranged; between roller 1 307 and roller 2 308 is an extrusion port 309; a heat sealing component 3 is also arranged on the heat sealing port 310. The heat-sealed component 3 includes a hollow shell 301, which has two sets of hot air inlets, namely a first hot air inlet 303 and a second hot air inlet 304. The hollow shell 301 is connected to a hot air inlet 302. The first hot air inlet 303 and the second hot air inlet 304 are both strip-shaped and face the two sides of the strip-shaped membrane 4. The strip-shaped membrane 4 has pinholes arranged at intervals. The winding station 7 is a winding roller. Its substantial technical effects and implementation process, i.e., its basic functions and non-obvious aspects, are as follows: A low-cost drip irrigation film preparation method, characterized in that it utilizes the low-cost drip irrigation film preparation equipment described in any one of the above claims, characterized in that... First, turn on the motor 103 to move the moving base 105 outwards. Then, load the plastic film roll 601 and the strip film roll 401. Next, move the moving base 105 inwards and position the plastic film roll 601 and the strip film roll 401. The strip film 4 and sheet film 6 are pulled through the extrusion port 309 between roller 1 307 and roller 2 308; and hung on the winding roller of the winding station 7. The heating fan is turned on, and hot air is sprayed out from the first hot air outlet 303 and the second hot air outlet 304 to heat both sides of the strip film roll 401. The motor of the winding roller at the winding station 7 is started, and the heated strip film roll 401 and sheet film 6 are squeezed together. It forms a composite membrane that is locally bilayered.

[0026] The shortcomings of existing technology are: strong sunlight and windy and sandy climates cause pipelines to age quickly, with a lifespan of 1-2 years; poor interface stability makes them prone to detachment and leakage; high rate of mechanical damage during agricultural operations; and interference with mechanized operations.

[0027] The non-obviousness and significant technical advancements of this invention are as follows: This invention employs a "partially double-layered integrated membrane" as the membrane tube beneath the membrane. The double-layered portion is covered downwards by a mulching machine, and both sides are compacted. The membrane tube is doubly protected by the soil and the mulch, avoiding sun exposure, rain, and wind and sand erosion, thus significantly extending its service life. The strip-shaped membrane and the sheet-shaped membrane are heat-sealed together by heat-sealing components at the heat-sealing station, eliminating the interface structure of traditional pipes and completely solving the problem of pipe detachment and leakage caused by sudden pressure changes. The membrane tube is hidden under the membrane and will not be collided with or crushed by agricultural implements, significantly reducing the rate of mechanical damage. After mulching, there are no exposed pipe obstacles on the ground, which does not affect mechanized operations such as sowing and harvesting, thus improving production efficiency.

[0028] The shortcomings of existing technologies include: difficulty in locating fault points, the need for large-scale excavation for repairs, the inability to monitor irrigation conditions in real time, the burial depth being insufficient and easily damaged by tilling, and the complex installation process and increased costs.

[0029] The non-obviousness and significant technical advancements of this invention are as follows: The membrane tube under the membrane is laid on the soil surface along with the mulch film. Leaks, blockages, and other faults are directly reflected in the surface moisture level, allowing for rapid fault location. Repairs do not require large-scale excavation; only targeted treatment is needed, without affecting crop growth. The extent and degree of soil moisture can be directly observed at the surface, enabling real-time adjustment of irrigation parameters to avoid uneven irrigation. The membrane tube is integrally fixed with the mulch film, eliminating the need for separate deep trenches and preventing damage during tillage due to insufficient burial depth. Installation only requires mulching and compaction using a mulching machine, eliminating the need for complex procedures such as trench excavation and precise placement, significantly reducing costs compared to buried pipe installation.

[0030] The shortcomings of existing technologies are: drip irrigation systems require contiguous and concentrated plots of land, which conflicts with the decentralized contracting and management of rural areas; capillary tubes need to be laid row by row and recycled after irrigation, which requires a large amount of labor and affects the cost-effectiveness of technology promotion.

[0031] The non-obviousness and significant technical advancements of this invention are as follows: The preparation equipment of this invention can flexibly produce local double-layer films, eliminating the need for farmers to uniformly plan contiguous plots. Instead, farmers can lay the film piece by piece using a film-laying machine according to the size of their scattered plots, adapting to the decentralized contracting management model. The double-layer portion of the double-layer film directly serves as the film pipe under the film, eliminating the need to arrange capillary pipes row by row. No additional recycling or sorting is required after irrigation, saving tedious manual operations, significantly reducing labor input costs, and improving the cost-effectiveness of drip irrigation technology promotion.

[0032] In summary, this patent innovatively combines mulch film and drip irrigation pipe into one, creating a low-cost drip irrigation system that can function in the current season.

[0033] Example 2: As a further improvement, parallel, or optional independent solution, a support structure 305 is arranged on the heat-sealed component 3. Two extrusion rollers 306 are mounted on the support structure 305. The upper surface of the extrusion rollers 306 can contact both sides of the strip film 4, thereby relatively pressing the strip film 4 and the sheet film 6 together. The substantial technical effect and its implementation process, i.e., the basic function and non-obvious aspects, are as follows: After heat sealing, the extrusion rollers continue to provide auxiliary extrusion. During this process, since the subsequent winding rollers are still providing tension, heat sealing can be achieved.

[0034] Example 3: As a further improvement, parallel, or optional independent solution, the winding rollers at winding station 7 can provide tension, serving as the power source for the entire system. The substantial technical effect and its implementation process, i.e., the basic function and non-obvious aspects, are as follows: achieving winding.

[0035] Example 4: As a further improvement, parallel, or optional independent solution, the bottom of the movable seat 105 includes a threaded block, which is threadedly mounted on the threaded rod 104. The bottom of the movable seat 105 also includes a hole arranged on the track; the threaded rod 104 is poweredly connected to the motor 103. The substantial technical effect and its implementation process, i.e., the basic function and non-obvious aspects, are as follows: it enables left and right movement, thus allowing for loading and unloading of materials.

[0036] Example 5: As a further improvement, parallel, or optional independent solution, the hot air inlet 302 is connected to a heating fan. The substantial technical effect and its implementation process, i.e., the basic function and non-obvious aspects, are as follows: it can provide hot air.

[0037] Example 6: As a further improvement, parallel solution, or optional independent solution, the membrane 4 is located in the middle of the sheet membrane 6. The substantial technical effect and its implementation process, i.e., the basic function and non-obviousness, are as follows: the drip irrigation position is located in the middle.

[0038] Example 7: As a further improvement, parallel, or alternative independent solution, a low-cost drip irrigation method using a drip irrigation membrane is characterized by using a partially bilayer integrated membrane prepared by the method described above. The double-layered part is covered downwards, and a laminating machine is used for lamination. During the lamination process, both sides are pressed firmly. By connecting drip irrigation pipes to the ends of the double-layer section, water will flow between the double membranes, forming a de facto membrane-under-membrane tube, thus achieving drip irrigation.

[0039] Example 8: As a further improvement, parallel solution, or optional independent solution, a low-cost drip irrigation method using drip irrigation membranes is characterized by having several intermediate ports in the middle of the double-layer portion, with the intermediate ports obliquely inserted between the double-layer membranes. Referring to the last attached figure, multiple ports can be used for water delivery.

[0040] Innovatively, each of the above effects exists independently, yet a single structure can be used to combine the results.

[0041] It should be noted that the multiple modules in this patent are an integration of existing technology modules and do not involve any new modules. Even if some modules use programs, those programs are undoubtedly known programs.

[0042] It should be noted that the multiple solutions provided in this patent include their own basic solutions, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve multiple effects.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A low-cost drip irrigation film preparation device, characterized in that, The preparation equipment is capable of thermally bonding strip membrane (4) and sheet membrane (6) into a composite membrane that is partially double-layered; The equipment includes a feeding station (1), a heat sealing station (2), and a winding station (7) arranged in sequence. There is a tensioning space (5) between the material feeding station (1) and the heat sealing station (2); The material feeding station (1) includes a base (101), on which a fixed seat (102) and a movable seat (105) are arranged, and the movable seat (105) can move left and right; Support rods (106) are arranged on the fixed seat (102) and the movable seat (105), and extrusion plates (107) are arranged on the support rods (106). Two sets of center rods (108) are arranged on the extrusion plates (107). On each extrusion plate (107), the two sets of central rods (108) have a shorter upper section for placing the film roll (601) and a longer lower section for placing the strip film roll (401); the longer central rod (108) is located below the shorter central rod (108); The heat sealing station (2) includes a heat sealing port (310) with two rollers, namely roller one (307) and roller two (308), arranged in the heat sealing port (301); the extrusion port (309) is between roller one (307) and roller two (308); a heat sealing component (3) is also arranged on the heat sealing port (310); The heat-sealed component (3) includes a hollow shell (301), on which two sets of hot air inlets are provided, namely a first hot air inlet (303) and a second hot air inlet (304), and the hollow shell (301) is connected to a hot air inlet (302); the first hot air inlet (303) and the second hot air inlet (304) are both strip-shaped and the inlet faces the two sides of the strip-shaped membrane (4); pinholes are arranged at intervals on the strip-shaped membrane (4); The winding station (7) is a roller that can be wound up.

2. The low-cost drip irrigation film preparation equipment as described in claim 1, characterized in that, A support structure (305) is arranged on the heat-sealed part (3), and two extrusion rollers (306) are installed on the support structure (305). The upper surface of the extrusion rollers (306) can contact the two sides of the strip film (4) and thus press the strip film (4) and the sheet film (6) relatively.

3. The low-cost drip irrigation film preparation equipment as described in claim 1, characterized in that, The winding rollers at the winding station (7) provide tension, which is the power source for the entire system.

4. The low-cost drip irrigation film preparation equipment as described in claim 1, characterized in that, The bottom of the movable seat (105) includes a threaded block, which is threadedly mounted on the threaded rod (104). The bottom of the movable seat (105) also includes a hole arranged on the track; the threaded rod (104) is powered to the motor (103).

5. The low-cost drip irrigation film preparation equipment as described in claim 1, characterized in that, The hot air inlet (302) is connected to the heating fan.

6. The low-cost drip irrigation film preparation equipment as described in claim 1, characterized in that, The membrane (4) is located in the middle of the sheet membrane (6).

7. A low-cost drip irrigation membrane preparation method, characterized in that, The low-cost drip irrigation film preparation equipment according to any one of claims 1-6 is characterized in that, First, turn on the motor (103) to move the moving base (105) outward, then load the film roll (601) and strip film roll (401), and then move the moving base (105) inward; place the film roll (601) and strip film roll (401) in place; Pull the strip film (4) and sheet film (6) through the extrusion port (309) between roller one (307) and roller two (308); hang them on the winding roller at the winding station (7); The heating fan is turned on, and hot air is sprayed out from the first hot air port (303) and the second hot air port (304) to heat both sides of the strip film roll (401); The motor of the winding roller at the winding station (7) is started, and the heated strip film roll (401) and sheet film (6) are squeezed together; It forms a composite membrane that is locally bilayered.

8. A drip irrigation method using a low-cost drip irrigation film, characterized in that, A partially bilayer integrated membrane prepared by the method of claim 7; The double-layered part is covered downwards, and a laminating machine is used for lamination. During the lamination process, both sides are pressed firmly. By connecting drip irrigation pipes to the ends of the double-layer section, water will flow between the double membranes, forming a de facto membrane-under-membrane tube, thus achieving drip irrigation.

9. The drip irrigation method using the low-cost drip irrigation film as described in claim 8, characterized in that, A low-cost drip irrigation method for drip irrigation film is characterized by setting some intermediate openings in the middle of the double-layer portion, with the intermediate openings being obliquely inserted between the double-layer film.

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