CN111616025A - Inclined seam compensation type drip infiltration pipe belt with internal embedded elastomer sleeve strip and preparation method thereof - Google Patents

Inclined seam compensation type drip infiltration pipe belt with internal embedded elastomer sleeve strip and preparation method thereof Download PDF

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Publication number
CN111616025A
CN111616025A CN202010519639.6A CN202010519639A CN111616025A CN 111616025 A CN111616025 A CN 111616025A CN 202010519639 A CN202010519639 A CN 202010519639A CN 111616025 A CN111616025 A CN 111616025A
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pipe belt
elastomer
oblique
sleeve
belt
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CN111616025B (en
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孟世明
孟宪武
杜娟
孙群英
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Shandong Changjiang Water Saving Irrigation Technology Co Ltd
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Shandong Changjiang Water Saving Irrigation Technology Co Ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/06—Watering arrangements making use of perforated pipe-lines located in the soil
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
    • A01C23/02—Special arrangements for delivering the liquid directly into the soil
    • A01C23/023—Special arrangements for delivering the liquid directly into the soil for liquid or gas fertilisers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protecting plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
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Abstract

The invention provides an embedded elastomer casing strip inclined puncture compensation type drip infiltration pipe belt and a preparation method thereof, wherein the embedded elastomer casing strip inclined puncture compensation type drip infiltration pipe belt consists of a forming pipe belt and an elastomer inner sleeve, the forming pipe belt is formed by co-extrusion lamination of an A layer and a B layer, the A layer is an EVA material, the B layer is a polyethylene material and has an A + B + A structure from inside to outside; the elastic inner sleeve is made of EVA (ethylene vinyl acetate) elastic material or TPE (thermoplastic elastomer) elastic material through injection molding and is embedded inside the molding pipe belt; the embedded part of the elastic body inner sleeve and the forming pipe belt is provided with a water outlet oblique barbed seam, the width of the oblique barbed seam can be adjusted according to the requirement of water dripping and seeping amount, and the direction of the feed oblique barbed seam is the water following direction. The oblique-stab-seam compensation type drip irrigation pipe belt with the inner embedded elastomer sleeve strip can be used for embedding and seeping shallow soil and irrigating plants integrally with water, fertilizer and pesticide, the inner elastomer sleeve and the formed pipe belt are firmly bonded, are not easy to fall off, have good pressure compensation performance, and solve the problem that the original drip irrigation pipe belt is easy to block.

Description

Inclined seam compensation type drip infiltration pipe belt with internal embedded elastomer sleeve strip and preparation method thereof
Technical Field
The invention belongs to the technical field of agricultural irrigation water delivery, and particularly relates to an inclined puncture compensation type drip infiltration pipe belt with an embedded elastomer sleeve strip and a preparation method thereof.
Background
In modern agricultural planting, water and fertilizer integrated water-saving irrigation refers to that water, chemical fertilizer, pesticide and the like are conveyed together and slowly dripped into soil at the roots of crops according to the water demand requirements of the crops, so that the water and fertilizer pesticide is prevented from leaking, volatilizing and wasting in the conveying process, the water and fertilizer can be saved to the maximum extent, the cost is reduced, and the water and fertilizer integrated water-saving irrigation has important significance in water-deficient areas.
In the prior water-fertilizer integrated water-saving irrigation in China, a weeping pipe belt internally embedded with a stable flow channel type inner patch or a dripper is mostly adopted, but the bonding point of the inner patch in the inner patch weeping pipe belt and the inner wall of the pipe belt is very small, and the inner patch is easy to age and deform under the high temperature of the sun in the using process to cause the falling of the inner patch; the drip infiltration pipe area of interior inlay dripper is because of the design runner is narrow short, and water pressure is less in the pipeline, so it is serious to have the dripper blocking phenomenon in using, has influenced the life in drip infiltration pipe area, and the compensation formula of domestic production simultaneously is inlayed the dripper because of elastomer material thickness degree of consistency and hardness control not good not have fine solution in always and is inlayed the dripper compensation effect, causes each section to drip the infiltration water yield inhomogeneous, influences irrigation effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an inclined puncture seam compensation type drip infiltration pipe belt with an internal embedded elastic sleeve strip, which is firm in bonding, free of falling, anti-blocking and good in pressure compensation and a preparation method thereof.
The invention provides a slant slit compensation type drip infiltration pipe belt with an embedded elastomer sleeve strip, which consists of a forming pipe belt and an elastomer inner sleeve,
the forming pipe belt is formed by co-extruding and laminating an A layer and a B layer, wherein the A layer is made of an EVA material, the B layer is made of a polyethylene material and has an A + B + A structure from inside to outside, and the wall thickness is adjustable according to the use pressure and preferably ranges from 0.5mm to 2 mm;
the inner elastomer sleeve is made of EVA (ethylene vinyl acetate) elastomer material or TPE (thermoplastic elastomer) elastomer material through injection molding and is embedded in the molding pipe belt, the outer diameter of the inner elastomer sleeve is 0.05-0.5 mm larger than the inner diameter of the molding pipe belt, the length of the inner elastomer sleeve is 5-30 mm, and the inner and outer walls of two ends of the inner elastomer sleeve are designed into inclined planes so as to reduce overflowing water resistance and better fit the inner wall of the molding pipe belt;
the embedded part of the elastic body inner sleeve and the forming pipe belt is provided with a water outlet oblique stabbing seam, the width of the oblique stabbing seam can be adjusted according to the requirement of water dripping and seeping amount, the optimal width is not more than 4mm, and the direction of the feed oblique stabbing is the direction along the water.
Preferably, the EVA material comprises 97-99% of EVA elastomer and 1-3% of carbon black matrix by weight;
the polyethylene material comprises the following components in percentage by weight: 40-70% of high-density polyethylene (HDPE), 30-60% of low-density polyethylene (LD PE), 3-5% of mica powder, 3-5% of carbon fiber powder and 1-3% of carbon black master batch.
Preferably, the EVA elastomer is one or a combination of more of Taiwan plastic 7340M/7620M/7660M, Mitsui chemical P0803/150, Korea 1828/1826, U.S. DuPont 150/250/260/460 and Beijing organic 28-150/28-25/155.
Preferably, the high-density polyethylene (HDPE) is one or a combination of more of Mooney petrochemical E4012/TR480M/HHMTR480, Qilu petrochemical DGDB2480/DGD3479, American Dow DGDA-2490BK/DGDA-5004NT7/DMDA-6250NT7 and Exxon Mobil HD7800P/HD6950 YU.
Preferably, the low-density polyethylene (LDPE) is one or a combination of more of Dow TG2085B, Exxon Mobil LD103, LG chemical MB9300/9500, Shanghai petrochemical Q200/Q281/N150 and Yanshan petrochemical LD100AC/LD160 AS/N450.
Because the A layer in the forming pipe belt is made of EVA material, the EVA/TPE elastomer material has good phase fusibility with the elastomer inner sleeve, and the outer diameter of the elastomer inner sleeve is larger than the inner diameter of the forming pipe belt, and the contact area is large, the elastomer inner sleeve is firmly bonded with the forming pipe belt and is not easy to fall off; the outer layer A of the forming pipe is made of an elastomer material, the outer layer A has a closing effect after the forming pipe is punctured, the negative pressure of the pipe does not absorb mud during underground infiltrating irrigation, and plant roots do not invade; the layer B is formed by blending and extruding high-density polyethylene (HDPE) and low-density polyethylene (LDPE), and has high strength and good compression resistance. The direction of the feeding oblique stabs of the inner sleeve of the elastic body is along the water direction, so that a pressure compensation effect is formed, the pressure at the water inlet end is high, the close closing of the oblique seams is small, the water pressure is reduced, the closing degree is reduced, and the purpose of uniform water outlet is achieved.
The second aspect of the invention provides a method for preparing the above-mentioned inlaid elastomer casing strip inclined seam compensation type drip infiltration pipe belt, comprising the following steps:
the method comprises the following steps: extruding and molding the molded pipe belt, namely respectively co-extruding and combining the EVA elastomer layer A and the polyethylene layer B by 2 extruders through an extruder head neck mold machine head to form the molded pipe belt with a structure of A + B + A from inside to outside;
step two: the inner sleeve of the elastomer is embedded into the forming pipe belt through the central hole of the head of the belt conveying extruder;
step three: extruding the formed pipe strap through a mouth die, fusing the inner elastic body sleeve, and sizing, cooling and sizing by using a vacuum sizing sleeve and a vacuum sizing water tank;
step four: after traction by a traction machine, carrying out oblique puncture by a puncture machine to prepare an oblique puncture compensation type drip infiltration pipe belt internally embedded with an elastomer sleeve strip;
step five: marking and counting according to the using direction of the embedded elastomer sleeve strip inclined seam compensation type drip infiltration pipe belt, winding by a winding machine, and packaging into a finished product according to the quantity requirement.
Preferably, the temperatures of all sections of the extruder A in the first step are respectively 130-140 ℃ in the first zone, 140-150 ℃ in the second zone, 150-160 ℃ in the third zone, 160-170 ℃ in the fourth zone, 160-160 ℃ in the fifth zone, 150 ℃ in the head connector, 170-180 ℃ in the head body and 160-170 ℃ in the neck mold from the feeding port section;
the temperature of each zone of the B-layer extruder is 140-150 ℃ from the feeding port section, 150-160 ℃ from the first zone, 170-180 ℃ from the third zone, 180-190 ℃ from the fourth zone, 180 ℃ from the fifth zone, 170 ℃ from the machine head connector, 170 ℃ from the machine head body to 180 ℃ from the mouth mold, 160-170 ℃.
Preferably, in the fourth step, the oblique stabs penetrate the forming pipe belt and the elastic inner sleeve at one time, the spacing distance of the stabs is adjusted according to the water seepage amount requirement of each meter of pipe, the optimal spacing distance is more than 5mm, and the direction of feeding the oblique stabs is along the water direction.
The third aspect of the invention provides the application of the oblique stab seam compensation type drip irrigation pipe belt with the internal embedded elastomer sleeve strip in the field of plant irrigation by burying and water, fertilizer and pesticide in shallow soil.
Compared with the prior art, the inner embedded elastomer sleeve strip inclined seam compensation type drip infiltration pipe belt provided by the invention has the following gain effects:
(1) the elastic body inner sleeve is firmly bonded with the molding pipe belt and is not easy to fall off. The inner wall of the inner embedded elastomer casing strip inclined puncture compensation type dripping and infiltrating pipe belt provided by the invention is made of EVA (ethylene vinyl acetate) material, the EVA/TPE elastomer material of the elastomer inner sleeve has good phase fusibility, and meanwhile, the outer diameter of the elastomer inner sleeve is larger than the inner diameter of the forming pipe belt, and the contact area is large, so that the elastomer inner sleeve is firmly adhered to the forming pipe belt and is not easy to fall off.
(2) The inner embedded elastic sleeve strip inclined puncture seam compensation type drip irrigation pipe belt solves the problem that the original drip irrigation pipe belt is easy to block. The outermost layer of the oblique puncture compensation type drip infiltration pipe belt internally embedded with the elastomer sleeve strip is made of EVA elastomer materials, the permeation pipe belt has a closing effect after puncture, can be used for embedding and infiltrating shallow soil and irrigating plants integrally with water, fertilizer and pesticide, and has the advantages that the negative pressure of a pipeline does not absorb mud during the underground permeation irrigation and the root system of the plant does not invade.
(3) The pressure compensation performance of the internally-embedded elastomer sleeve strip inclined puncture seam compensation type drip infiltration pipe is good. The direction of the oblique stabs of the inner sleeve of the elastomer of the inner embedded elastomer casing strip oblique stabbing compensation type drip infiltration pipe belt provided by the invention is along the water direction, so that a pressure compensation effect is formed, the pressure at the water inlet end is high, the oblique slots are tightly closed, the water yield is low, the degree of convergence is reduced by the decrease of the water pressure, the water yield is increased, and the purpose of uniform water outlet of the whole pipe belt is achieved.
(4) The inner embedded elastomer sleeve strip inclined seam compensation type drip infiltration pipe belt has good mechanical property and high drawing resistance. The forming pipe belt of the oblique-stab-seam compensation type drip-infiltration pipe belt internally embedded with the elastomer sleeve strip, provided by the invention, contains mica powder and carbon fiber, wherein the mica powder is of a sheet structure and forms a three-dimensional net structure together with the carbon fiber in a polypropylene layer, and the tensile strength of the drip-infiltration pipe belt can be obviously improved through the synergistic effect of the mica powder and the carbon fiber.
Drawings
FIG. 1 is a schematic view of an oblique puncture compensating drip-infiltration belt with an embedded elastomer casing strip of the present invention, FIG. 2 is a schematic view of a section of a formed belt of the present invention, FIG. 3 is a front view of an elastomer casing strip of the present invention, and FIG. 4 is a schematic view of an elastomer casing strip structure of the present invention.
Wherein: 1-forming a pipe strip; 2-an elastomeric cover strip; 3-oblique needling; 11-A layer; 12-B layer.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, which are merely exemplary and not exhaustive for the technical effects of the invention.
EXAMPLE 1 oblique-stab-seam compensating drip-infiltration pipe belt with internal-inlaid elastomer casing strip
An inner embedded elastomer casing strip inclined seam compensation type dripping and permeating pipe belt comprises a forming pipe belt 1 and an elastomer inner sleeve 2, wherein the forming pipe belt 1 is formed by co-extruding and laminating an A layer 11 and a B layer 12, the outer diameter is 20mm, the A layer 11 is made of an EVA material, the B layer 12 is made of a polyethylene material and has an A + B + A structure from inside to outside, the thickness of the inner A layer 11 is 0.2mm, the thickness of the B layer 12 is 0.5mm, the thickness of the inner A layer 11 is 0.3mm, and the total wall thickness is 1 mm; the EVA material comprises the following components in percentage by weight: 98% of EVA elastomer, 7340M of Taiwan plastic and 2% of carbon black master batch; the polyethylene material comprises the following components in percentage by weight: 50% of high-density polyethylene (HDPE), 40% of low-density polyethylene (LDPE), 100% of Yanshan petrochemical LD100AC, 3% of mica powder, 5% of carbon fiber powder and 2% of carbon black masterbatch; the elastic body inner sleeve 2 is made of EVA elastic body materials through injection molding and is embedded inside the molding pipe belt 1, the outer diameter of the elastic body inner sleeve 2 is 18.2mm, the outer diameter is 0.2mm larger than the inner diameter of the molding pipe belt 1, the length is 10mm, and the inner wall and the outer wall of each of two ends of the elastic body inner sleeve 2 are designed into inclined planes; the embedded part of the elastomer inner sleeve 2 and the forming pipe belt 1 is provided with a water outlet oblique barbed seam 3, the width of the oblique barbed seam 3 is 4mm, and the direction of the feed oblique barbed is along the water direction.
A method for preparing an inclined puncture compensation type drip infiltration pipe belt with an internal embedded elastomer casing strip comprises the following steps:
the method comprises the following steps: extruding and molding the molding pipe belt 1, and respectively co-extruding and combining the A layer 11EVA elastomer and the B layer 12 polyethylene through an extruder head neck mold head by adopting 2 extruders to form the molding pipe belt 1 with an A + B + A structure from inside to outside; the temperatures of all sections of the A layer 11 extruder are respectively 130 ℃ in the first zone, 140 ℃ in the second zone, 150 ℃ in the third zone, 160 ℃ in the fourth zone, 160 ℃ in the fifth zone, 150 ℃ in the head connector, 170 ℃ in the head body and 160 ℃ in the neck mold from the section of the feed inlet; the temperatures of the zones of the B layer 12 extruder are 140 ℃ in the first zone, 150 ℃ in the second zone, 170 ℃ in the third zone, 180 ℃ in the fourth zone, 180 ℃ in the fifth zone, 170 ℃ in the head body and 170 ℃ in the mouth mold 160 ℃ from the feed inlet section.
Step two: the elastomer inner sleeve 2 is conveyed to the central hole position of the extruder head through a belt and is embedded into the forming pipe belt 1;
step three: extruding the formed pipe strap 1 through a mouth die, fusing an elastic body inner sleeve 2, and sizing, cooling and sizing through a vacuum sizing water tank;
step four: after traction by a traction machine, carrying out oblique needling 3 by a needling machine, wherein the interval between the front oblique needling and the rear oblique needling is 200mm, and the direction of feed oblique needling is the direction along the water to prepare an inner-embedded elastomer sleeve strip oblique needling compensation type drip infiltration pipe belt;
step five: marking and counting according to the using direction of the embedded elastomer sleeve strip inclined seam compensation type drip infiltration pipe belt, winding by a winding machine, and packaging into a finished product according to the quantity requirement.
Example 2
An inner embedded elastomer casing strip inclined seam compensation type dripping and permeating pipe belt comprises a forming pipe belt 1 and an elastomer inner sleeve 2, wherein the forming pipe belt 1 is formed by co-extruding and laminating an A layer 11 and a B layer 12, the outer diameter is 20mm, the A layer 11 is made of an EVA material, the B layer 12 is made of a polyethylene material and has an A + B + A structure from inside to outside, the thickness of the inner A layer 11 is 0.2mm, the thickness of the B layer 12 is 0.5mm, the thickness of the inner A layer 11 is 0.5mm, and the total wall thickness is 1.2 mm; the EVA material comprises the following components in percentage by weight: 98% of EVA elastomer, with the trade mark of Mitsui chemical P0803 and 2% of carbon black mother; the polyethylene material comprises the following components in percentage by weight: 65% of high-density polyethylene (HDPE), 25% of Exxon Mobil HD7800P, 25% of low-density polyethylene (LDPE), 103% of Exxon Mobil LD, 3% of mica powder, 5% of carbon fiber powder and 2% of carbon black masterbatch; the elastic body inner sleeve 2 is made of EVA elastic body materials through injection molding and is embedded inside the molding pipe belt 1, the outer diameter of the elastic body inner sleeve 2 is 17.8mm, the outer diameter is 0.2mm larger than the inner diameter of the molding pipe belt 1, the length is 15mm, and the inner wall and the outer wall of each of two ends of the elastic body inner sleeve 2 are designed into inclined planes; the embedded part of the elastomer inner sleeve 2 and the forming pipe belt 1 is provided with a water outlet oblique barbed seam 3, the width of the oblique barbed seam 3 is 4mm, and the direction of the feed oblique barbed is along the water direction.
The preparation method is the same as example 1.
Example 3
An inner embedded elastomer casing strip inclined seam compensation type dripping and permeating pipe belt comprises a forming pipe belt 1 and an elastomer inner sleeve 2, wherein the forming pipe belt 1 is formed by co-extruding and laminating an A layer 11 and a B layer 12, the outer diameter is 20mm, the A layer 11 is made of an EVA material, the B layer 12 is made of a polyethylene material and has an A + B + A structure from inside to outside, the thickness of the inner A layer 11 is 0.2mm, the thickness of the B layer 12 is 0.8mm, the thickness of the inner A layer 11 is 0.5mm, and the total wall thickness is 1.5 mm; the EVA material comprises the following components in percentage by weight: 98% of EVA elastomer, the trademark is American DuPont 260, and 2% of carbon black mother; the polyethylene material comprises the following components in percentage by weight: 50% of High Density Polyethylene (HDPE), 40% of Low Density Polyethylene (LDPE), 500% of LG chemical, 3% of mica powder, 5% of carbon fiber powder and 2% of carbon black masterbatch; the elastic body inner sleeve 2 is made of EVA elastic body materials through injection molding and is embedded inside the molding pipe belt 1, the outer diameter of the elastic body inner sleeve 2 is 17.25mm, the outer diameter is 0.25mm larger than the inner diameter of the molding pipe belt 1, the length is 15mm, and the inner wall and the outer wall of each of two ends of the elastic body inner sleeve 2 are designed into inclined planes; the embedded part of the elastomer inner sleeve 2 and the forming pipe belt 1 is provided with a water outlet oblique barbed seam 3, the width of the oblique barbed seam 3 is 4mm, and the direction of the feed oblique barbed is along the water direction.
The preparation method is the same as example 1.
Comparative example 1
The utility model provides a polyethylene is inlayed cylinder dripper compensation formula drip infiltration pipe area comprises shaping pipe area and cylinder dripper, shaping pipe area external diameter is 20mm, and the wall thickness is 1mm, and the material is by weight, includes: high Density Polyethylene (HDPE) 50%, the trade mark is famous petrochemical industry E4012, Low Density Polyethylene (LDPE) 40%, the trade mark is Yanshan petrochemical industry LD100AC, mica powder 3%, carbon fiber powder 5%, the female 2% of charcoal black, the cylinder dripper is High Density Polyethylene (HDPE) material, and the external diameter is 18mm, inlays and is in inside the shaping area, the cylinder dripper interval is 200mm, the position is inlayed with the shaping pipe area to the cylinder dripper is provided with out water oblique acanthosis, and oblique acanthosis width is 4 mm.
The preparation method comprises the following steps:
the method comprises the following steps: the molding pipe belt 1 is extruded and molded, polyethylene is extruded by an extruder through an extruder head neck mold machine head, the temperature of each zone of the extruder is 140 ℃ in the first zone, 150 ℃ in the second zone, 170 ℃ in the third zone, 180 ℃ in the fourth zone, 180 ℃ in the fifth zone, 170 ℃ in the machine head body and 160 ℃ in the neck mold from a feeding port section.
Step two: the cylindrical drippers are conveyed to the central hole of the extruder head of the belt and embedded into the forming pipe belt, and the distance between the cylindrical drippers is 200 mm;
step three: extruding the formed pipe belt through a mouth die, fusing a cylindrical dripper, and sizing, cooling and sizing by using a vacuum sizing water tank;
step four: after being drawn by a tractor, the polyethylene drip irrigation pipe is obliquely needled by a needling machine to prepare a polyethylene internally-embedded cylindrical dripper compensation type drip infiltration pipe belt;
step five: marking and counting are carried out according to the using direction of the polyethylene internally-embedded cylindrical dripper compensation type dripping and infiltrating pipe belt, and the polyethylene internally-embedded cylindrical dripper compensation type dripping and infiltrating pipe belt is wound by a winding machine and packed into a finished product according to the quantity requirement.
Comparative example 2
The utility model provides an inlay oblique acanthosis of elastomer nook strip compensation formula drip infiltration pipe area, its structure, size and constitution refer to example 1, the difference is that the elastomer endotheca 2 sets up the oblique acanthosis 3 of play water with shaping pipe area 1 embedding position, and the oblique acanthosis 3 width is 4mm, and the direction of feed oblique acanthosis is the anti-water direction.
The preparation method is the same as example 1.
Comparative example 3
An inlaid elastomeric strip slanted slit compensating drip-infiltration belt of the structure, size and composition referred to in example 1, except that said formed belt 1 comprises by weight layer B of polyethylene material comprising: 53 percent of high-density polyethylene (HDPE), 40 percent of low-density polyethylene (LDPE), 5 percent of carbon fiber powder and 2 percent of carbon black masterbatch, wherein the trade name is Maofengshi E4012, and the trade name is Yanshan petrochemical LD100 AC.
The preparation method is the same as example 1.
Comparative example 4
An inlaid elastomeric strip slanted slit compensating drip-infiltration belt of the structure, size and composition referred to in example 1, except that said formed belt 1 comprises by weight layer B of polyethylene material comprising: 55% of high-density polyethylene (HDPE), 40% of low-density polyethylene (LDPE), 100% of Yanshan petrochemical LD100AC, 3% of mica powder and 2% of carbon black masterbatch.
The preparation method is the same as example 1.
The oblique-seam compensation type drip irrigation pipe belts obtained in the examples 1-3 and the comparative examples 1-4 are respectively subjected to a flow uniformity test, a flow-water inlet pressure test and a drawing test, and the test method refers to the standard GB/T19812.2-2017 part 2 of plastic water-saving irrigation equipment: pressure compensation type water dropper and drip irrigation pipe, the test result is as follows:
TABLE 1 flow uniformity test, flow-Water inlet pressure test and Pull test results
Figure BDA0002531507640000071
It can be seen from the test results of examples 1-3 and comparative examples 2-4 in table 1 that, under the same outer diameter and puncture width, the direction of the oblique puncture of the inner sleeve of the elastomer of the compensation type drip infiltration pipe belt with the embedded elastomer sleeve strip and oblique puncture provided in examples 1-3 of the present invention is along the water direction, the pressure at the water inlet end is large, the oblique gap is tightly closed, the water yield is small, the degree of convergence is reduced by the decrease of the water pressure, the water yield is increased, the pressure compensation effect is formed, the flow uniformity and flow-water inlet pressure correlation are obviously better than those of comparative example 1 without the elastomer closed structure, and the direction of the oblique puncture of the inner sleeve of the elastomer is along the counter water direction, which is comparative example 2 with negative pressure compensation.
As can be seen from example 1 and comparative examples 3-4, the tensile resistance of example 1 containing mica powder and carbon fiber powder is obviously improved compared with comparative example 3 containing no mica powder and comparative example 4 containing no carbon fiber powder, which indicates that the tensile resistance of the drip-infiltration pipe belt can be obviously improved by the mica powder and the carbon fiber powder.
In addition, in the embodiment 1-3, the test water with the content of 3% mud is repeatedly introduced, the water seepage of the inclined puncture seams of the pipe walls is uniform and is not blocked, the loess water is well stirred and pasted at the water outlet of the puncture seams and is dried in the sun, the water seepage is still performed and the blockage is avoided when the water is introduced again, the puncture seams are penetrated into the pipe by the outer wall of the pipe, the water seeped from the inner sleeve can be seeped smoothly, the water quality requirement of irrigation water is reduced, and the water and fertilizer integration is ensured.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (9)

1. An inclined puncture compensation type drip infiltration pipe belt with an internal embedded elastomer sleeve strip is characterized by consisting of a forming pipe belt and an elastomer inner sleeve,
the forming pipe belt is formed by co-extruding and laminating an A layer and a B layer, wherein the A layer is made of an EVA material, the B layer is made of a polyethylene material and has an A + B + A structure from inside to outside, and the wall thickness is adjustable according to the use pressure and preferably ranges from 0.5mm to 2 mm;
the inner elastic sleeve is made of EVA (ethylene vinyl acetate) elastic material or TPE (thermoplastic elastomer) elastic material through injection molding and is embedded in the molding pipe belt, the outer diameter of the inner elastic sleeve is 0.05-0.5 mm larger than the inner diameter of the molding pipe belt, the length of the inner elastic sleeve is 5-50 mm, and the inner wall and the outer wall of each of two ends of the inner elastic sleeve are designed into inclined planes so as to reduce overflowing water resistance and better fit the inner wall of the molding pipe belt;
the embedded part of the elastic body inner sleeve and the forming pipe belt is provided with a water outlet oblique stabbing seam, the width of the oblique stabbing seam can be adjusted according to the requirement of water dripping and seeping amount, the optimal width is not more than 4mm, and the direction of the feed oblique stabbing is the direction along the water.
2. The drip-feed belt with an internal elastomer casing strip and a diagonal puncture compensation of claim 1, wherein the EVA material comprises, by weight: 97-99% of EVA elastomer and 1-3% of carbon black matrix;
the polyethylene material comprises the following components in percentage by weight: 40-70% of high-density polyethylene (HDPE), 30-60% of low-density polyethylene (LDPE), 3-5% of mica powder, 3-5% of carbon fiber powder and 1-3% of carbon black masterbatch.
3. The drip-feed belt with an inner embedded elastomer casing strip and a diagonal seam compensation according to claim 2, wherein the EVA elastomer is one or more of Taiwan plastic 7340M/7620M/7660M, Mitsui chemical P0803/150, Korea 1828/1826, U.S. DuPont 150/250/260/460, Beijing organic 28-150/28-25/155.
4. The inlaid elastomeric strip diagonal puncture compensating drip-infiltration belt of claim 2, wherein the High Density Polyethylene (HDPE) is one or a combination of more of the following petrolat E4012/TR480M/HHMTR480, zilu petrolat DGDB2480/DGD3479, american dow DGDA-2490BK/DGDA-5004NT7/DMDA-6250NT7, exxonfu HD7800P/HD6950 YU.
5. The oblique-seam compensation drip-infiltration pipe belt with an internal-inlaid elastomer sleeve strip as claimed in claim 2, wherein the low-density polyethylene (LDPE) is one or more of Dow TG2085B, Exxonmobil LD103, LG chemical MB9300/9500, Shanghai petrochemical Q200/Q281/N150, Yanshan petrochemical LD100AC/LD160 AS/N450.
6. The method for preparing the oblique-seam-compensated drip-infiltration belt with the internal elastic casing strip as claimed in claim 1, which comprises the following steps:
the method comprises the following steps: extruding and molding the molded pipe belt, namely respectively co-extruding and combining the EVA elastomer layer A and the polyethylene layer B by 2 extruders through an extruder head neck mold machine head to form the molded pipe belt with a structure of A + B + A from inside to outside;
step two: the inner sleeve of the elastomer is embedded into the forming pipe belt through the central hole of the head of the belt conveying extruder;
step three: extruding the formed pipe strap through a mouth die, fusing the inner elastic body sleeve, and sizing, cooling and sizing by using a vacuum sizing sleeve and a vacuum sizing water tank;
step four: after traction by a traction machine, carrying out oblique puncture by a puncture machine to prepare an oblique puncture compensation type drip infiltration pipe belt internally embedded with an elastomer sleeve strip;
step five: marking and counting according to the using direction of the embedded elastomer sleeve strip inclined seam compensation type drip infiltration pipe belt, winding by a winding machine, and packaging into a finished product according to the quantity requirement.
7. The method for preparing the oblique-seam compensation type drip-infiltration pipe belt with the internal embedded elastomer sleeve strip as claimed in claim 6,
the temperatures of all sections of the extruder of the layer A in the step one are respectively 130-140 ℃ in a first area, 140-150 ℃ in a second area, 150-160 ℃ in a third area, 160-170 ℃ in a fourth area, 160 ℃ in a fifth area, 150 ℃ in a head connector, 170-180 ℃ in a head body and 160-170 ℃ in a neck mold from a feeding port section;
the temperature of each zone of the B-layer extruder is 140-150 ℃ from the feeding port section, 150-160 ℃ from the first zone, 170-180 ℃ from the third zone, 180-190 ℃ from the fourth zone, 180 ℃ from the fifth zone, 170 ℃ from the machine head connector, 170 ℃ from the machine head body to 180 ℃ from the mouth mold, 160-170 ℃.
8. The method for preparing the oblique-seam compensation type drip-infiltration pipe belt with the internal embedded elastomer sleeve strip as claimed in claim 6,
and in the fourth step, the oblique stabbing seam pierces the pipe wall and the inner sleeve elastomer at one time, the spacing distance of the stabbing seam is adjusted according to the water seepage amount requirement of each meter of pipe, the optimal spacing distance is more than 5mm, and the direction of the feed oblique stabbing is the direction along the water.
9. The use of the oblique-stab seam-compensating drip irrigation pipe belt with an internal elastic sleeve strip as claimed in claim 1 in the field of plant irrigation by burying water and fertilizer and pesticide in shallow soil.
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