CN114835965A - Preparation method of ant-proof protective layer and gas pipeline with protective layer - Google Patents
Preparation method of ant-proof protective layer and gas pipeline with protective layer Download PDFInfo
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- CN114835965A CN114835965A CN202210375491.2A CN202210375491A CN114835965A CN 114835965 A CN114835965 A CN 114835965A CN 202210375491 A CN202210375491 A CN 202210375491A CN 114835965 A CN114835965 A CN 114835965A
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- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 4
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- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 claims description 3
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- KAATUXNTWXVJKI-UHFFFAOYSA-N cypermethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OC(C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-UHFFFAOYSA-N 0.000 claims description 3
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Images
Classifications
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention discloses a preparation method of an ant-prevention protective layer and a gas pipeline with the protective layer, wherein the preparation method comprises the following steps: 1) weighing the components according to the formula of the protective layer, adding the components into a mixer for mixing, and discharging the materials after mixing; 2) adding the mixed materials obtained in the step 1) into a double-screw extruder for melt blending, and performing blow molding after the materials come out of a die head in the double-screw extruder to obtain the protective layer; the formula of the protective layer comprises the following components in parts by weight: 80-100 parts of resin, 1-4 parts of antioxidant, 1-5 parts of pyrethroid, 0.5-1.5 parts of sulfluramid, 0.5-1 part of coal tar, 0.1-2 parts of kaolin, 0.1-0.2 part of coupling agent and 0.1-1.0 part of dispersant. The protective layer prepared by the method not only can effectively inhibit the invasion of the termites chemically, but also can improve the hardness and physically prevent the termites from washing and biting.
Description
Technical Field
The invention relates to the technical field of gas pipeline protection, in particular to a preparation method of an ant-proof protective layer and a gas pipeline with the protective layer.
Background
The PE gas pipe has the advantages of long service life, strong chemical corrosion resistance, simple and reliable construction, good air tightness, good toughness, energy consumption saving, low comprehensive cost of the pipeline and the like, is applied to gas transportation more and more, and the PE gas pipe is used as a first choice for town gas pipes in some areas.
However, the PE gas pipe has some difficult problems to be solved while being applied in a large quantity. As is known, the gas pipeline has high requirements on safety performance, but because the PE material has low hardness, the PE material can be damaged by termites and even bitten by the termites, so that gas leakage is caused; on the other hand, the surface of the PE pipeline material is easy to scratch in the transportation and laying processes due to the characteristics of the PE pipeline material, and serious hidden danger is brought to the safe use of the PE pipeline. In addition, when the PE pipeline is connected by electric melting, the surface of the pipeline needs to be treated, and the process is relatively troublesome.
Disclosure of Invention
The invention provides a gas pipeline with a protective layer, which has a novel structure and effectively prevents corrosion including termites, corrosive liquid and the like.
The technical scheme adopted by the invention is as follows:
a preparation method of an ant-proof protective layer comprises the following steps:
1) Weighing the components according to the formula of the protective layer, adding the components into a mixer for mixing, and discharging the materials after mixing;
2) adding the mixed materials obtained in the step 1) into a double-screw extruder for melt blending, and performing blow molding after the materials come out of a die head in the double-screw extruder to obtain the protective layer;
the formula of the protective layer comprises the following components in parts by weight: 80-100 parts of resin, 1-4 parts of antioxidant, 1-5 parts of pyrethroid, 0.5-1.5 parts of sulfluramid, 0.5-1 part of coal tar, 0.1-2 parts of kaolin, 0.1-0.2 part of coupling agent and 0.1-1.0 part of dispersant.
The present invention provides an embodiment, the resin is selected from a polyethylene resin or a polypropylene resin;
the antioxidant is selected from one or more of antioxidant 1076, antioxidant 246, antioxidant 2246 and antioxidant 330;
the pyrethroid is selected from one or more of phenothrin, permethrin, fenpropathrin, cyhalothrin and cypermethrin;
the coupling agent is selected from KH 550;
the dispersant is selected from benzenesulfonyl butylamine.
The invention provides an embodiment, 2), the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 140-145 ℃, the temperature of the second zone is 160-165 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 205-210 ℃, and the temperature of the sixth zone is 220-225 ℃;
The rotating speed of a main machine of the double-screw extruder is 250-300 r/min.
The invention provides an implementation mode, wherein the mass ratio of the pyrethroids to the sulfluramid to the coal tar to the kaolin is 3: 1: 0.5: 0.5.
the invention also provides a gas pipeline prepared by the protective layer prepared by the preparation method, and the specific scheme is as follows:
a gas pipeline with a protective layer comprises a pipeline body, wherein the outer wall of the pipeline body is provided with the protective layer; the protective layers comprise a first protective layer and a second protective layer, the first protective layer is arranged on the outer wall of the pipeline body main body, and the second protective layer is arranged on the outer wall of the port of the pipeline body; the second protective layer is detachably connected with the pipeline body.
The invention provides an implementation mode, wherein a first protective layer and a second protective layer are integrally formed and are distinguished by arranging a pinhole pressing line, the second protective layer is arranged at a port close to a pipeline body, and the first protective layer is arranged at the other side of the pinhole pressing line; the second inoxidizing coating still is provided with the pinhole line ball, is convenient for tear exposed pipeline body.
The invention provides an implementation mode, wherein the first protective layer is detachably connected with the second protective layer.
The invention provides an implementation mode, wherein release paper is attached to the adhesive surface of the second protective layer, and a fixing belt is further arranged for fixing the second protective layer.
The invention provides an implementation mode, the circumference of a circle formed by rolling the second protective layer is larger than that of the circumference of the port of the pipeline body, and the second protective layer forms a redundant part when being attached to the port of the pipeline body.
The invention provides an embodiment wherein the thickness of the protective layer is between 0.1 and 0.5 mm.
The invention provides an implementation mode, the protective layer is arranged in a single-layer structure or a multi-layer structure, and the protective layer can be paved to cover a base layer more according to the requirement.
The invention provides an implementation mode, which is further provided with a third protective layer, wherein the third protective layer is used for standby, and the third protective layer is detachably connected with the first protective layer.
The invention provides an implementation mode, and the pipeline body comprises straight-through type, three-way type and bent type pipelines.
The invention has the beneficial effects that:
the gas pipeline with the protective layer can realize effective protection, is composed of the strippable protective layer, has the advantages of scratch resistance, safe and convenient connection and the like compared with a single-layer PE gas pipeline, and can effectively improve the safety and reliability of the installation and use of the gas pipeline. By using a protective layer made of a different prior disclosed material, the life of the pipe is extended by preventing the pipe body from being gnawed by termites or rats. The protective layer prepared by the method not only can effectively inhibit the invasion of the termites chemically, but also can improve the hardness and physically prevent the termites from washing and biting.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is another schematic structural view of the present invention;
FIG. 3 is a schematic side view of the present invention;
FIG. 4 is a schematic diagram of a passivation layer structure according to the present invention, wherein the first passivation layer and the second passivation layer have the same structure.
Reference numerals:
pipeline body 1, first protective layer 2, second protective layer 3, redundant portion 4, pinhole line ball 5, third protective layer 6, fixed band 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, third, etc. in this specification are only used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order.
Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not require that the components be absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" represents at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
A preparation method of an ant-proof protective layer comprises the following steps:
1) weighing the components according to the formula of the protective layer, adding the components into a mixer for mixing, and discharging the materials after mixing;
2) adding the mixed materials obtained in the step 1) into a double-screw extruder for melt blending, and performing blow molding after the materials come out of a die head in the double-screw extruder to obtain the protective layer, wherein the protective layer is marked as a sample 1; the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 140-145 ℃, the temperature of the second zone is 160-165 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 205-210 ℃, and the temperature of the sixth zone is 220-225 ℃; the main machine rotating speed of the double-screw extruder is 250-300 r/min, and the current is 60-70A.
The formula of the protective layer comprises the following components in parts by weight: 80 parts of resin, 1 part of antioxidant, 1 part of pyrethroid, 0.5 part of sulfluramid, 0.5 part of coal tar, 0.1 part of kaolin, 0.1 part of coupling agent and 0.1 part of dispersant.
The resin is selected from polyethylene resin or polypropylene resin; the antioxidant is selected from antioxidant 1076; the pyrethroid is selected from phenothrin and/or permethrin; the coupling agent is selected from KH 550; the dispersant is selected from benzenesulfonyl butylamine.
Example 2
A preparation method of an ant-proof protective layer comprises the following steps:
1) weighing the components according to the formula of the protective layer, adding the components into a mixer for mixing, and discharging the materials after mixing;
2) adding the mixed materials obtained in the step 1) into a double-screw extruder for melt blending, and performing blow molding after the materials come out of a die head in the double-screw extruder to obtain the protective layer, wherein the protective layer is marked as a sample 2; the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 140-145 ℃, the temperature of the second zone is 160-165 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 205-210 ℃, and the temperature of the sixth zone is 220-225 ℃; the main machine rotating speed of the double-screw extruder is 250-300 r/min, and the current is 60-70A.
The formula of the protective layer comprises the following components in parts by weight: 90 parts of resin, 2 parts of antioxidant, 3 parts of pyrethroid, 1 part of sulfluramid, 0.5 part of coal tar, 0.5 part of kaolin, 0.15 part of coupling agent and 0.5 part of dispersant.
The resin is selected from polyethylene resin or polypropylene resin; the antioxidant is selected from an antioxidant 2246 mixture; the pyrethroid is selected from fenpropathrin and cyhalothrin in a mass ratio of 1: 1; the coupling agent is selected from KH 550; the dispersant is selected from benzenesulfonyl butylamine.
Example 3
A preparation method of an ant-proof protective layer comprises the following steps:
1) weighing the components according to the formula of the protective layer, adding the components into a mixer for mixing, and discharging the materials after mixing;
2) adding the mixed materials obtained in the step 1) into a double-screw extruder for melt blending, and performing blow molding after the materials come out of a die head in the double-screw extruder to obtain the protective layer, wherein the protective layer is marked as a sample 3; the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 140-145 ℃, the temperature of the second zone is 160-165 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 205-210 ℃, and the temperature of the sixth zone is 220-225 ℃; the main machine rotating speed of the double-screw extruder is 250-300 r/min, and the current is 60-70A.
The formula of the protective layer comprises the following components in parts by mass: 100 parts of resin, 4 parts of antioxidant, 5 parts of pyrethroid, 0.2 part of coupling agent and 1.0 part of dispersant.
The resin is selected from polyethylene resin or polypropylene resin; the antioxidant is selected from antioxidant 1076, antioxidant 246, antioxidant 2246 and antioxidant 330, which are mixed in equal mass; the pyrethroid is selected from the group consisting of phenothrin, permethrin, fenpropathrin, cyhalothrin and cypermethrin in equal mass; the coupling agent is selected from KH 550; the dispersant is selected from benzenesulfonyl butylamine.
The samples prepared in examples 1-3 were tested for termite resistance as follows:
1. selection of test methods
To evaluate the termite resistance of the materials we conducted termite tests on the respective materials with reference to the relevant standard methods. The test method is characterized in that an experimental colony method is selected, and domestic termites are selected by the termites, wherein the quantity of the soldiers is not more than 10%. During the test, the nest piece of the domestic termite is cut into pieces with the size of 5-10 mm, the pieces are placed in an oven with the temperature of 120 ℃ for drying for 1 hour, 150g of dry nest pieces are weighed and placed in a feeding jar, 90ml of distilled water is added, then the dried nest pieces are placed in a constant temperature box with the temperature of 40-60 ℃, the constant temperature box is uniformly wetted and then taken out, and the dry nest pieces are cooled for later use. 3 feeding jars were made according to this method.
Then, 3 samples are respectively vertically placed in a feeding jar, 1/5 samples are left to be exposed on a nest plate, 10g of termites are respectively placed in the feeding jar, and the feeding jar is covered and placed in an environment with the temperature of 26-27 ℃. The test period was 3 months, appearance was checked once a week and termite activity was recorded.
The termite damage rating of the test samples is shown in table 1, based on the most damaged sample among 3 samples.
TABLE 1 Termite decay rating Scale
| Grade of decay | Description of sample being damaged by moth |
| 1 | No tooth mark damaged by termite is seen on the surface and edge of the |
| 2 | The surface and the edge of the sample are rough surfaces, but no dent or the depth of the dent is within |
| 3 | The surface and the edge of the sample have obvious moth marks and are provided with pits, and the moth depth of the edge is (1-2) |
| 4 | The sample surface and most part along the edge are corroded, the corrosion depth along the edge is more than 2mm or the surface is perforated |
2. Termite resistance test research of conventional polyethylene gas pipeline
In order to research the termite resistance of the conventional polyethylene gas pipeline material, the conventional polyethylene materials of the grades of ME3440, ME3441, 3802B, 3802Y, XS10B, XS10ORANGE and the like are selected and subjected to termite resistance test according to the test method in 1. The relevant test results are shown in table 2:
TABLE 2 Termite resistance test results for conventional polyethylene gas pipes
| Tubular product trade mark | Test results | Grade of decay | |
| ME3440 | Wherein the edges of the parts have slight termite-damaged tooth marks | |
|
| ME3441 | Wherein the edges of the parts have slight termite-damaged tooth marks | |
|
| 3802B | With slight termite attack on the edges of the | Stage | 2 |
| 3802Y | Wherein the edges of the parts have slight termite-damaged tooth marks | |
|
| XS10B | Wherein the edges of the parts have slight termite-damaged tooth marks | |
|
| XS10ORANGE | Wherein the edges of the parts have slight termite-damaged tooth marks | |
As can be seen from the above table, the conventional polyethylene pipes without the external coating layer are 2-grade in termite-damage resistance, and have poor termite resistance.
3. Termite resistance test of unaged raw materials
To evaluate the termite resistance of our two coating layer termite resistant materials we refer to JB/T10696.9-2011 "test method for mechanical and physical and chemical properties of wires and cables section 9: termite test method Standard, the material was subjected to a termite test.
The test specimens are in the form of sheets having a length of 80mm, a width of 25mm and a thickness of 2mm, according to the requirements of the test standards. The number of samples was 3. The test specimen obtained in example 2 was used as a test specimen, and the protective layer sample 2 obtained from a polyethylene resin was designated as TR01, and the protective layer sample 2 obtained from a polypropylene resin was designated as TR 02.
The test results of the TR01 and TR02 samples are shown in Table 3:
TABLE 3 Termite resistance test results for unaged coating materials
From the table, it can be known that the termite-proof grade of the TR01 and TR02 materials which are not subjected to aging treatment is 1 grade, the description of the applicable places of the termite-proof materials in the GB/T34016-2017 general rules of rat-proof and termite-proof electric wires and cables is referred to, and the TR01 and TR02 materials can be applicable to comprehensive termite control and termite prevention in termite-damaged areas, so that the safety and reliability of pipelines can be improved.
4. Evaluation of sustained effectiveness of termite resistance of coating raw material
In order to evaluate the anti-aging performance of the termite-resistant raw material of the coating layer and the lasting effectiveness of the termite-resistant performance of the material, the termite-resistant performance test is carried out according to the test method described in the 1 after the accelerated aging treatment of the developed two material samples.
The TR01 raw material is modified on the basis of PE base resin, and the test conditions refer to the PE sample aging treatment conditions in the GB/T34016-2017 standard, namely, the thermal oxidation aging test is carried out for 240 hours in a thermal oxidation aging treatment box at 110 ℃. The test specimen after the thermo-oxidative aging test was named TR 01-A.
The TR01 raw material is modified on the basis of PP base resin, and the test conditions refer to the thermal oxidation aging test conditions in the annex G of the ISO21809-1-2018 standard to treat a sample, wherein the test temperature is 150 ℃, and the thermal oxidation aging time is 240 h. The sample after thermo-oxidative aging was designated TR 02-A.
The samples of TR01-A and TR02-A after thermo-oxidative aging were again tested for termite resistance according to the test method described in 1. The test results are shown in table 4.
TABLE 4 Termite resistance test results of samples after thermo-oxidative aging
From Table 4, it can be seen that the TR01 and TR02 materials after thermo-oxidative aging are rated at 1 for termite resistance, indicating that the termite resistance of both materials continues to be effective.
The termite-proof performance of the two materials is tested by colony termite test, the test result is termite-damaged grade 1, and the two materials have excellent termite-proof performance. In addition, the termite-proof performance test is carried out again after the thermal oxidation aging performance test is carried out on the material, and the test result is level 1, which shows the continuous effectiveness of the termite-proof performance of the two raw materials.
The termite resistance tests described above were carried out in examples 1 and 3, respectively, in the same manner, and the same results, i.e., both of them were rated 1, were obtained.
Comparative example:
by adopting the preparation method of example 2, the formulation does not contain sulfluramid, coal tar and kaolin, the dosage ratio of the other components is the same as the steps and methods, a comparison sample is obtained, the termite resistance test and the aging resistance test (the comparison sample-A is obtained after aging), and the final results are shown in Table 5.
TABLE 5 Termite resistance test results for samples after thermo-oxidative aging
According to research, the Shore hardness of the protective layers prepared in the examples 1-3 is higher than that of the comparative examples D5-8. The increase of the hardness inhibits the corrosion of the termites to a certain extent, and simultaneously, the termite-proof effect is enhanced due to the compatibility of the flubendiamide, the coal tar, the kaolin and the pyrethroid in the formula. And surprisingly, the Shore hardness of a control sample (without kaolin) prepared by the same method is obviously higher than that of a control sample prepared by only containing pyrethroids in a formula when the control sample is prepared by national test standards of plastics such as polyethylene and the like.
The following examples 4 to 6 are gas pipes prepared by using the protective layer prepared in any of the above examples, and specifically, the adhesive used for conforming to the gas pipe is coated on the surface layer of the protective layer, cut into a suitable shape to cover the surface layer of the gas pipe, and is peelable to facilitate on-site construction.
Example 4
As shown in the figures, the gas pipeline with the protective layer comprises a pipeline body 1, wherein the protective layer is arranged on the outer wall of the pipeline body 1; the protective layers comprise a first protective layer 2 and a second protective layer 3, the first protective layer 2 is arranged on the outer wall of the main body of the pipeline body 1, and the second protective layer 3 is arranged on the outer wall of the port of the pipeline body 1; the second protective layer 3 is detachably connected with respect to the pipe body 1. Through setting up to the protective layer of two parts, on-the-spot constructor can cut the pipeline body 1 of tip and when reaching to accord with the hot melt welding, only need with independent setting second protective layer 3 lift can, the pertinence is stronger, the operation of the scene of being convenient for. Meanwhile, the protective layer is arranged to protect the pipeline and prevent the surface layer from being damaged. The protective layer may be made of any of the protective materials disclosed in the prior art, including termite, rat and corrosion resistant functional layers. For example, the termite-proof coating can be prepared by taking the coating material disclosed in CN201711036926.6 as reference, can be specifically prepared by coating the termite-proof coating on a base layer, and can also be prepared by combining a plurality of prior arts, and comprehensively considering other factors such as adhesiveness, wear resistance, acid and alkali resistance and the like. The detachable connection comprises the traditional easier detachable connection and also comprises the forcible detachment through a tool, for example, the circumferential peeling is carried out through a tool such as a ring cutter, the forcible peeling is carried out for a smaller length as far as possible, after the two pipelines are hot-melted, the connection part, namely the part without the protective layer, is as small as possible, and the influence of the protective layer can be reduced to the minimum in time; if supplemented by the third protective layer 6, the girdling length can be relatively long.
Example 5
As shown in the figures, the gas pipeline with the protective layer comprises a pipeline body 1, wherein the protective layer is arranged on the outer wall of the pipeline body 1; the protective layers comprise a first protective layer 2 and a second protective layer 3, the first protective layer 2 is arranged on the outer wall of the main body of the pipeline body 1, and the second protective layer 3 is arranged on the outer wall of the port of the pipeline body 1; the second protective layer 3 is detachably connected relative to the pipeline body 1; the first protective layer 2 and the second protective layer are integrally formed and are distinguished by arranging a pinhole pressing line 5, a second protective layer 3 is arranged at a port close to the pipeline body 1, and the first protective layer 2 is arranged at the other side of the pinhole pressing line 5; the second inoxidizing coating still is provided with pinhole line ball 5, is convenient for tear exposed pipeline body 1. The shaping laminating one deck protective layer is earlier gone up at pipeline body 1 promptly, again through the line ball that passes through the pinhole form at the tip for the hand tears more easily, and the protective layer is through optimizing with pipeline body 1's viscidity, and the worker's hand of being convenient for tears. Pinhole line 5 can be used for reference any hand that current paper set up tears the broken line setting.
Example 6
As shown in the figures, the gas pipeline with the protective layer comprises a pipeline body 1, wherein the protective layer is arranged on the outer wall of the pipeline body 1; the protective layers comprise a first protective layer 2 and a second protective layer 3, the first protective layer 2 is arranged on the outer wall of the main body of the pipeline body 1, and the second protective layer 3 is arranged on the outer wall of the port of the pipeline body 1; the second protective layer 3 is detachably connected relative to the pipeline body 1;
The first protective layer 2 and the second protective layer are arranged to be detachably connected and are independent;
first protective layer 2 directly pastes with pipeline body 1 on, second protective layer 3 can be pasted the face laminating and have from type paper, directly roll up second protective layer 3 and paste in pipeline body 1's tip, owing to set up and tear the laminating from the workman of being convenient for more of type paper, consequently, the rethread is equipped with fixed band 7 and is used for fixed second protective layer 3, has prevented to paste the problem that can't laminate that has caused from type paper. If no second protective layer 3 is fixed at the end part through the attachment of the fixing band 7, the end part of the pipeline is exposed to cause damage.
In one embodiment, the circumference of the circle formed by rolling the second protective layer 3 is larger than the circumference of the port of the pipe body 1, and the redundant portion 4 is formed when the second protective layer 3 is attached to the port of the pipe body 1. The second protective layer 3 expandes to be a rectangle promptly, and the width is the radial direction of pipeline promptly, and long be the circumferencial direction of pipeline, after enclosing laminating the outer circumference of pipeline, the long limit of appropriate increase is greater than the outer circumference of pipeline to make can complete cladding pipeline, redundant portion 4 is that part of play is long promptly, if just as long as outer circumference, actual work progress's error will cause connecting portion to have the seam to produce, makes the protection effect descend.
An embodiment is provided, wherein the thickness of the protective layer is 0.1-0.5mm, and can be selected according to the requirement in different thicknesses of 0.2mm, 0.3mm, 0.35mm, 0.4mm, and the like.
The protection layer is arranged in a single-layer structure or a multi-layer structure, the single-layer structure can be only a termite-proof layer, the multi-layer structure can be simply understood as a multi-layer structure formed by overlapping a plurality of single-layer protection layers, each layer of protection layer can be an independent functional layer, the protection layer structure which has the protection function and can be used for a pipeline disclosed by any prior art and the selection of materials of the protection layer structure can be specifically referred to, and the protection layer can be formed by combining a plurality of technical schemes.
An embodiment is provided, wherein a third protective layer 6 is further provided, said third protective layer 6 being intended for standby, the third protective layer 6 being detachably connected to the first protective layer 2. With the adoption from the second protective layer 3 that the type paper set up can dismantle connected mode the same with pipeline body 1, if fix through fixed band 7, fixed band 7 has viscidity. Firstly, the second protective layer 3 is spare after being damaged, and simultaneously, when the second protective layer needs to be cut off from the middle of a standard pipeline, an additional protective layer is needed to finally finish the coating after hot melting.
The pipe body 1 described in the present application includes straight-through type, three-way type, and bending type pipes, but is not limited to those structures, and is applicable to any structure of pipes.
The embodiments of the present application also include any non-conflicting technical feature combination scheme.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The preparation method of the ant-proof protective layer is characterized by comprising the following steps:
1) weighing the components according to the formula of the protective layer, adding the components into a mixer for mixing, and discharging the materials after mixing;
2) adding the mixed materials obtained in the step 1) into a double-screw extruder for melt blending, and performing blow molding after the materials come out of a die head in the double-screw extruder to obtain the protective layer;
the formula of the protective layer comprises the following components in parts by weight: 80-100 parts of resin, 1-4 parts of antioxidant, 1-5 parts of pyrethroid, 0.5-1.5 parts of sulfluramid, 0.5-1 part of coal tar, 0.1-2 parts of kaolin, 0.1-0.2 part of coupling agent and 0.1-1.0 part of dispersant.
2. The method for producing an ant-proof protective layer according to claim 1, wherein: the resin is selected from polyethylene resin or polypropylene resin;
the antioxidant is selected from one or more of an antioxidant 1076, an antioxidant 246, an antioxidant 2246 and an antioxidant 330;
the pyrethroid is selected from one or more of phenothrin, permethrin, fenpropathrin, cyhalothrin and cypermethrin;
the coupling agent is selected from KH 550;
the dispersant is selected from benzenesulfonyl butylamine.
3. The method for producing an ant-proof protective layer according to claim 1, wherein: 2) the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 140-145 ℃, the temperature of the second zone is 160-165 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 205-210 ℃ and the temperature of the sixth zone is 220-225 ℃;
the rotating speed of a main machine of the double-screw extruder is 250-300 r/min.
4. The method for producing an ant-proof protective layer according to claim 1, wherein: the mass ratio of the pyrethroids to the sulfluramid to the coal tar to the kaolin is 3: 1: 0.5: 0.5.
5. a gas pipeline with a protective layer is characterized in that: the pipeline comprises a pipeline body, wherein a protective layer is arranged on the outer wall of the pipeline body; the protective layers comprise a first protective layer and a second protective layer, the first protective layer is arranged on the outer wall of the pipeline body main body, and the second protective layer is arranged on the outer wall of the port of the pipeline body; the second protective layer is detachably connected with the pipeline body; the protective layer is prepared by the preparation method of the ant-proof protective layer according to claims 1 to 4.
6. The gas pipeline with protective layer of claim 1, wherein: the first protective layer and the second protective layer are integrally formed and are distinguished by arranging a pinhole pressing line, the second protective layer is arranged at the port close to the pipeline body, and the first protective layer is arranged at the other side of the pinhole pressing line; the second inoxidizing coating still is provided with the pinhole line ball, is convenient for tear exposed pipeline body.
7. The gas pipeline with protective layer of claim 1, wherein: the second protective layer is detachably connected with the first protective layer.
8. The gas pipe with the armor layer of claim 3, wherein: the second protective layer is adhered with release paper on the adhering surface, and a fixing belt is arranged for fixing the second protective layer; the circumference of a circle formed by rolling the second protective layer is larger than that of the circumference of the port of the pipeline body, and the second protective layer forms a redundant part when being attached to the port of the pipeline body.
9. The gas pipeline with protective layer of claim 1, wherein: still be provided with the third protective layer, the third protective layer is used for reserve, and the third protective layer can be dismantled with first protective layer and be connected.
10. The gas pipeline with protective layer of claim 1, wherein: the pipeline body comprises straight-through type, three-way type and bent type pipelines.
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| CN202210375491.2A CN114835965B (en) | 2022-04-11 | Preparation method of termite-proof protective layer and gas pipeline with protective layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210375491.2A CN114835965B (en) | 2022-04-11 | Preparation method of termite-proof protective layer and gas pipeline with protective layer |
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| CN114835965B CN114835965B (en) | 2024-05-03 |
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