Production method of degradable geotechnical filter cloth

Abstract

The invention discloses a production method of degradable geotechnical filter cloth, which is characterized in that disordered air blowing plates are arranged at the top and the bottom of a cotton box device, a plurality of vertical air blowing holes are distributed in the disordered air blowing plates in a dot matrix manner, and a spiral flow deflector is arranged in each air blowing hole. The top disordered air blowing plate and the bottom disordered air blowing plate generate disordered air blowing up and down in the box body, the disordered air acts on fibers in the box body, so that the fibers are more uniformly distributed, and the fibers are mutually wound through the physical action of the disordered air, so that the binding force among the fibers is enhanced; the transverse blowing device blows the wound fibers to the roller, then the roller gradually rolls the wound fibers and discharges the fibers out of the cotton box device, primary fiber filter cloth with large thickness is formed, then the fiber filter cloth is subjected to hot pressing through the hot pressing device, the thickness of the filter cloth is reduced, and the strength of the filter cloth is further improved. In addition, the filter cloth prepared by the invention takes natural fibers as main raw materials, and has good degradability.

Description

Technical Field

[0001] The invention belongs to the technical field of geotextile filter cloths, and in particular relates to a production method of degradable geotextile filter cloths. Background Art

[0002] In the field of civil engineering, soft foundation (soft soil foundation) refers to soil layers with low bearing capacity, high compressibility and low strength, such as silt, peat, etc. When building on these types of soil, special measures are usually required to ensure structural stability and safety. Traditional soft soil foundation treatment methods include the use of plastic drain boards or sand wells. Drain board filter cloth is usually used when treating soft soil foundations. Traditional drain board filter cloth may contain non-degradable components, which will cause environmental pollution if used for a long time. Therefore, the development of new degradable non-woven filter cloth has become a research focus. These materials require the use of natural fibers (such as cotton, linen, sugarcane, etc.) as raw materials, combined with special manufacturing processes to ensure that the materials have good strength and filtration performance, and can be naturally degraded after the end of the use cycle. In summary, the development of a filter cloth that can be naturally degraded after completing its function has become an urgent need. Summary of the invention

[0003] The present invention is mainly to overcome the shortcomings of the prior art and provides a method for producing a degradable geotextile filter cloth. The filter cloth produced by this method can be used for drainage boards to improve soil conditions. It has good mechanical properties and degradability, and can be gradually decomposed after the project is completed, reducing the impact on the environment.

[0004] The present invention is achieved through the following technical solutions:

[0005] A method for producing a degradable geotextile filter cloth, the method using a production device, the production device comprising a cotton box device and a hot pressing device;

[0006] The cotton box device comprises a box body, a feeding port is arranged on the box body, a downward blowing device is arranged on the top of the box body, an upward blowing device is arranged on the bottom of the box body, a transverse blowing device is arranged on one side of the box body, and a roller is arranged at the discharge port position on the opposite side of the transverse blowing device of the box body;

[0007] The downward blowing device is provided with a top random blowing plate, and the upward blowing device is provided with a bottom random blowing plate; the top random blowing plate and the bottom random blowing plate have the same structure and are symmetrically arranged up and down, and the structure is as follows: comprising a plate body, a plurality of vertical blowing holes are arranged in a dot matrix on the plate body, and a spiral guide vane is arranged in each blowing hole, and the spiral guide vane includes two forms of a forward spiral guide vane and a reverse spiral guide vane;

[0008] The production method of degradable geotextile filter cloth using the above equipment is as follows:

[0009] Step 1, putting fiber raw materials into a cotton box device, the fiber raw materials include: hot-melt fiber and natural fiber;

[0010] Step 2, start the cotton box device, generate chaotic wind blowing up and down in the box body through the top chaotic blowing plate and the bottom chaotic blowing plate, the chaotic wind acts on the fibers in the box body, so that the fibers are more evenly distributed, and the fibers are entangled with each other through the physical effect of the chaotic wind force; the fibers are blown transversely by the transverse blowing device, on the one hand, it has a synergistic effect with the top chaotic blowing plate and the bottom chaotic blowing plate to promote the entanglement of the fibers, and on the other hand, the transverse blowing device blows the entangled fibers toward the roller roller, and the roller roller gradually rolls the entangled fibers out of the cotton box device, forming a preliminary thick and randomly interwoven fiber filter cloth;

[0011] Step 3, hot pressing the fiber filter cloth discharged from the cotton box device through a hot pressing device to reduce the thickness of the filter cloth and further improve the strength of the filter cloth.

[0012] In the above technical solution, the downward blowing device includes a top air inlet hood and a top random blowing plate. The top air inlet hood is arranged above the top random blowing plate, and the two are connected. A first air inlet is arranged on the top of the top air inlet hood. Air flow is blown into the top air inlet hood through the first air inlet, and then the air flow passes through the top random blowing plate and blows downward into the body of the cotton box.

[0013] In the above technical scheme, the upward blowing device includes a bottom air inlet hood and a bottom random blowing plate. The bottom air inlet hood is arranged below the bottom random blowing plate, and the two are connected. A second air inlet is arranged at the bottom of the bottom air inlet hood. Air flow is blown into the bottom air inlet hood through the second air inlet, and then the air flow passes through the bottom random blowing plate and blows upward into the body of the cotton box.

[0014] In the above technical solution, the blowing hole is in a polygonal shape.

[0015] In the above technical solution, the blowing hole is circular in shape.

[0016] In the above technical solution, a winding device is arranged behind the hot pressing device for winding the filter cloth after hot pressing.

[0017] In the above technical solution, a conveyor belt is arranged between the cotton box device and the hot pressing device.

[0018] In the above technical solution, the natural fiber can be any one or more of a mixture of cotton fiber, hemp fiber, palm fiber or sugarcane fiber.

[0019] The advantages and beneficial effects of the present invention are:

[0020] The present invention sets symmetrically arranged random blowing plates at the top and bottom of the cotton box device, and a plurality of vertical blowing holes are arranged in a dot matrix on the random blowing plates, and a spiral guide vane is set in each blowing hole, and these spiral guide vanes include two forms of spiral guide vanes in the forward rotation direction and spiral guide vanes in the reverse rotation direction. Through the above-mentioned blowing structure, the top random blowing plate and the bottom random blowing plate can generate random wind blowing up and down in the box body, and the random wind acts on the fibers in the box body, so that the fibers are more evenly distributed, and the fibers are entangled with each other through the physical action of the random wind force, forming interlacing and entanglement, strengthening the bonding force between the fibers, improving the durability and stability of the filter cloth, and maintaining its good air permeability and water permeability; in addition, the filter cloth made by the present invention uses natural fibers as the main raw material, has good degradability, can be gradually decomposed after the project is completed, and reduces the impact on the environment.

[0021] The present invention also provides a transverse blowing device on the side of the cotton box device for blowing air laterally on the fibers. On the one hand, it can produce a synergistic effect with the top random blowing plate and the bottom random blowing plate to further promote the entanglement of the fibers. On the other hand, the transverse blowing device can blow the entangled fibers toward the roller for discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic diagram of the system structure of the equipment used in the production method of the degradable geotextile filter cloth.

[0023] Figure 2 It is a structural schematic diagram of a random blowing plate in a cotton box device.

[0024] Figure 3 It is another structural schematic diagram of the messy blowing plate in the cotton box device.

[0025] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0027] A method for producing a degradable geotextile filter cloth, the method using a production device, see attached Figure 1 The production equipment includes a cotton box device 1 and a hot pressing device 2.

[0028] The cotton box device 1 includes a box body, on which a feed port 11 is provided, through which fiber raw materials are added into the box body; a downward blowing device 12 is provided on the top of the box body, an upward blowing device 13 is provided on the bottom of the box body, a horizontal blowing device 14 is provided on one side of the box body, and a pair of rollers 15 are provided at the discharge port position on the opposite side of the horizontal blowing device of the box body.

[0029] The downward blowing device 12 includes a top air inlet hood 121 and a top random blowing plate 122. The top air inlet hood 121 is arranged above the top random blowing plate 122, and the two are connected. A first air inlet 123 is arranged on the top of the top air inlet hood 121. Air flow is blown into the top air inlet hood 121 through the first air inlet 123, and then the air flow passes through the top random blowing plate 122 and blows downward into the body of the cotton box.

[0030] The upward blowing device 13 includes a bottom air inlet cover 131 and a bottom random blowing plate 132. The bottom air inlet cover 131 is arranged below the bottom random blowing plate 132, and the two are connected. A second air inlet port 133 is arranged at the bottom of the bottom air inlet cover 131. Air flow is blown into the bottom air inlet cover 131 through the second air inlet port 133, and then the air flow passes through the bottom random blowing plate 132 and blows upward into the body of the cotton box.

[0031] The top random blowing plate 122 and the bottom random blowing plate 132 have the same structure and are arranged symmetrically up and down. Figure 2 and attached Figure 3 Its structure is introduced in detail.

[0032] The top random blowing plate 122 and the bottom random blowing plate 132 have the following structures: a plate body 40 is provided with a plurality of vertical blowing holes 41 arranged in a dot matrix on the plate body 40, and the blowing holes 41 may be in a polygonal shape (see Figure 2 ) or circular structure (see Appendix Figure 3 ); A spiral guide vane is arranged in each blowing hole 41, and the spiral guide vane includes two forms: a forward spiral guide vane 42 and a reverse spiral guide vane 43. The two forms of spiral guide vanes can be randomly arranged in each blowing hole 41, or regularly arranged in each blowing hole 41. Through the above-mentioned blowing structure, the top random blowing plate 122 and the bottom random blowing plate 132 can generate a random wind blowing up and down in the box body. The random wind acts on the fibers in the box body, making the fibers more evenly distributed, and the fibers are entangled with each other through the physical action of the random wind force, forming interlacing and entanglement, strengthening the bonding force between the fibers, and thus can help form a filter cloth with sufficient strength and stability.

[0033] The transverse blowing device 14 is used to blow air laterally on the fibers. On the one hand, it can produce a synergistic effect with the top random blowing plate 122 and the bottom random blowing plate 132 to further promote the entanglement of the fibers. On the other hand, the transverse blowing device 14 can blow the entangled fibers toward the roller roller 15, and then the roller roller 15 gradually rolls the entangled fibers out of the cotton box device 1 to form a preliminary fiber filter cloth 0 with a relatively large thickness, which is then hot-pressed by the hot pressing device 2 to reduce the thickness of the filter cloth and further improve the strength of the filter cloth.

[0034] Furthermore, a winding device 3 is provided behind the hot pressing device 2 for winding the filter cloth after hot pressing; and a conveyor belt 5 is provided between the cotton box device 1 and the hot pressing device 2.

[0035] The production method of degradable geotextile filter cloth using the above equipment is as follows:

[0036] Step 1, putting fiber raw materials into the cotton box device 1, the fiber raw materials include hot-melt fibers and natural fibers, and the natural fibers can be any one or more mixtures of cotton fibers, hemp fibers, palm fibers or sugarcane fibers.

[0037] Step 2, start the cotton box device 1, and generate chaotic wind blowing up and down in the box body through the top chaotic blowing plate 122 and the bottom chaotic blowing plate 132. The chaotic wind acts on the fibers in the box body, making the fibers more evenly distributed, and the fibers are entangled with each other through the physical effect of the chaotic wind force; the fibers are blown laterally by the transverse blowing device 14, which, on the one hand, produces a synergistic effect with the top chaotic blowing plate 122 and the bottom chaotic blowing plate 132 to promote the entanglement of the fibers, and on the other hand, the transverse blowing device 14 blows the entangled fibers toward the roller roller 15, and the roller roller 15 gradually rolls the entangled fibers out of the cotton box device 1, forming a preliminary thicker randomly interwoven fiber filter cloth 0.

[0038] Step 3, hot pressing the fiber filter cloth discharged from the cotton box device 1 by the hot pressing device 2, so as to reduce the thickness of the filter cloth and further improve the strength of the filter cloth.

[0039] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0040] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A method for producing a degradable geotextile filter cloth, characterized in that: The method adopts a production device, which includes a cotton box device and a hot pressing device; The cotton box device comprises a box body, a feeding port is arranged on the box body, a downward blowing device is arranged on the top of the box body, an upward blowing device is arranged on the bottom of the box body, a transverse blowing device is arranged on one side of the box body, and a roller is arranged at the discharge port position on the opposite side of the transverse blowing device of the box body; The downward blowing device is provided with a top random blowing plate, and the upward blowing device is provided with a bottom random blowing plate; the top random blowing plate and the bottom random blowing plate have the same structure and are symmetrically arranged up and down, and the structure is as follows: comprising a plate body, a plurality of vertical blowing holes are arranged in a dot matrix on the plate body, and a spiral guide vane is arranged in each blowing hole, and the spiral guide vane includes two forms of a forward spiral guide vane and a reverse spiral guide vane; The production method of degradable geotextile filter cloth using the above equipment is as follows: Step 1, putting fiber raw materials into a cotton box device, the fiber raw materials include: hot-melt fiber and natural fiber; Step 2, start the cotton box device, generate chaotic wind blowing up and down in the box body through the top chaotic blowing plate and the bottom chaotic blowing plate, the chaotic wind acts on the fibers in the box body, so that the fibers are more evenly distributed, and the fibers are entangled with each other through the physical effect of the chaotic wind force; the fibers are blown transversely by the transverse blowing device, on the one hand, it has a synergistic effect with the top chaotic blowing plate and the bottom chaotic blowing plate to promote the entanglement of the fibers, and on the other hand, the transverse blowing device blows the entangled fibers toward the roller roller, and the roller roller gradually rolls the entangled fibers out of the cotton box device to form a preliminary randomly interwoven fiber filter cloth; Step 3, hot pressing the fiber filter cloth discharged from the cotton box device through a hot pressing device to reduce the thickness of the filter cloth and further improve the strength of the filter cloth.

2. The method for producing a degradable geotextile filter cloth according to claim 1, characterized in that: The downward blowing device includes a top air inlet hood and a top random blowing plate. The top air inlet hood is arranged above the top random blowing plate, and the two are connected. A first air inlet is arranged on the top of the top air inlet hood. Air flow is blown into the top air inlet hood through the first air inlet, and then the air flow passes through the top random blowing plate and blows downward into the body of the cotton box.

3. The method for producing a degradable geotextile filter cloth according to claim 1, characterized in that: The upward blowing device includes a bottom air inlet hood and a bottom random blowing plate. The bottom air inlet hood is arranged below the bottom random blowing plate, and the two are connected. A second air inlet is arranged at the bottom of the bottom air inlet hood. Air flow is blown into the bottom air inlet hood through the second air inlet, and then the air flow passes through the bottom random blowing plate and blows upward into the body of the cotton box.

4. The method for producing a degradable geotextile filter cloth according to claim 1, characterized in that: The blowing hole is in a polygonal shape.

5. The method for producing a degradable geotextile filter cloth according to claim 1, characterized in that: The blowing hole is circular in shape.

6. The method for producing a degradable geotextile filter cloth according to claim 1, characterized in that: A winding device is arranged behind the hot pressing device for winding the filter cloth after hot pressing.

7. The method for producing a degradable geotextile filter cloth according to claim 1, characterized in that: A conveyor belt is arranged between the cotton box device and the hot pressing device.

8. The method for producing a degradable geotextile filter cloth according to claim 1, characterized in that: The natural fiber is any one or more of cotton fiber, hemp fiber, palm fiber or sugarcane fiber.

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