CN115058196A - Natural gas pipeline external coating protective soft rubber and preparation method and use method thereof - Google Patents
Natural gas pipeline external coating protective soft rubber and preparation method and use method thereof Download PDFInfo
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- CN115058196A CN115058196A CN202210779153.5A CN202210779153A CN115058196A CN 115058196 A CN115058196 A CN 115058196A CN 202210779153 A CN202210779153 A CN 202210779153A CN 115058196 A CN115058196 A CN 115058196A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 188
- 239000003345 natural gas Substances 0.000 title claims abstract description 94
- 230000001681 protective effect Effects 0.000 title claims abstract description 42
- 239000005060 rubber Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011248 coating agent Substances 0.000 title claims abstract description 19
- 238000000576 coating method Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 58
- 239000000835 fiber Substances 0.000 claims abstract description 42
- 238000002156 mixing Methods 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000741 silica gel Substances 0.000 claims abstract description 24
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 21
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 21
- 239000010426 asphalt Substances 0.000 claims abstract description 19
- 239000003292 glue Substances 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 238000010073 coating (rubber) Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 9
- 239000007789 gas Substances 0.000 abstract description 8
- 238000001035 drying Methods 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a natural gas pipeline external coating protection soft rubber, a preparation method and a use method thereof, wherein the protection soft rubber comprises the following components: the composite material comprises the following raw materials in percentage by mass: 55 to 65 percent of asphalt, 8.4 to 18.4 percent of fiber, 8.3 to 18.3 percent of silica gel and 8.3 to 18.3 percent of antioxidant, wherein the total amount of the raw materials is 100 percent; the preparation method comprises the following steps: (1) preparing raw materials; (2) primarily stirring and mixing; (3) stirring and mixing again; the using method comprises the following steps: and coating the protective soft rubber with the thickness of 2.5-3.5cm on the outer wall of the natural gas pipeline and the joint of the natural gas pipeline, and naturally drying. Has the advantages that: the natural gas pipeline can be effectively protected by the protective soft rubber coated outside the natural gas pipeline, the ring stiffness of the natural gas pipeline is improved, and the service life of the natural gas pipeline is prolonged; meanwhile, gas leakage and even explosion safety accidents are reduced, potential safety hazards are reduced, the gas pipeline is prevented from being corroded, the service life of the gas pipeline is further prolonged, construction is simple, operation is easy, and construction cost is low.
Description
The technical field is as follows:
the invention belongs to the technical field of natural gas pipelines, and particularly relates to a natural gas pipeline externally-coated protective soft rubber, and a preparation method and a use method thereof.
The background art comprises the following steps:
the natural gas pipeline is used for conveying natural gas, and with the development and utilization of a large amount of natural gas, the PE natural gas pipeline is widely applied to municipal and rural gas pipeline network construction. In the process of natural gas pipeline construction, the natural gas pipeline is required to be buried underground; with the increase of underground pipelines, the natural gas pipelines buried underground throughout the year are extruded by the settlement of soil layers and even buildings, so that the natural gas pipelines are likely to deform and even cause serious results of fracture, the service life of the natural gas pipelines is shortened, further, safety accidents of gas leakage and even explosion can be caused, and great potential safety hazards exist; in order to solve the above problems, the patent with application number 202120147818.1 discloses a natural gas pipeline protection roadbed, wherein a protection shell for protecting a natural gas pipeline is fixedly connected in an installation ditch, so that the natural gas pipeline is not easy to deform and damage; the patent with the application number of 201910649075.5 discloses a natural gas pipeline laying and embedding method, wherein concrete is poured at the bottom of a groove, concrete walls are poured on two sides of the groove, a cover plate covers the groove above the natural gas pipeline, and powerful protection support is provided for the pipeline through the method; however, the two natural gas pipeline protection modes have the problems of complicated construction process and high construction cost.
The invention content is as follows:
in view of the above, the invention aims to provide a natural gas pipeline outer coating protective soft rubber, and a preparation method and a use method thereof.
The technical scheme of the invention discloses a natural gas pipeline external coating protective soft rubber which comprises the following raw materials in percentage by mass: 55 to 65 percent of asphalt, 8.4 to 18.4 percent of fiber, 8.3 to 18.3 percent of silica gel, 8.3 to 18.3 percent of antioxidant, and the total of the raw materials is 100 percent.
Further, the length of the fiber is 3cm-15 cm.
Further, the fibers are polypropylene fibers.
Wherein the asphalt has the functions of water resistance, corrosion resistance and oxidation resistance, and the purchase manufacturer of the antioxidant is Shijiazhuang Junlongghu chemical product sale limited company with the model of JL-239; the asphalt and the antioxidant cooperate to protect the fibers from oxidative corrosion and protect the natural gas pipeline from corrosion; the fiber purchasing manufacturer is corridor Roche energy-saving technology Limited company with the model number of J1001, and the fiber purchasing manufacturer has the following functions: the strength of the protective soft glue coated on the natural gas pipeline is improved, and the number of primary microcracks after coating is reduced; the silica gel is engineering adhesive silica gel, the purchasing manufacturer is Jinan multidimensional bridge chemical engineering Limited liability company, the model is 107, and the adhesive silica gel has the following effects: plays a role of bonding.
On the other hand, the technical scheme of the invention discloses a preparation method of a natural gas pipeline external coating protective soft rubber, which comprises the following steps: (1) preparing raw materials; (2) primarily stirring and mixing; (3) stirring and mixing again;
(1) preparing raw materials: preparing the following raw materials in percentage by mass: 55 to 65 percent of asphalt, 8.4 to 18.4 percent of fiber, 8.3 to 18.3 percent of silica gel and 8.3 to 18.3 percent of antioxidant, wherein the total amount of the raw materials is 100 percent;
(2) preliminary stirring and mixing: stirring and mixing the fibers and the silica gel prepared in the step (1) at the stirring speed of 450-550rmp for 10-15min, and uniformly stirring to obtain a mixture; because the silica gel has high fluidity, the silica gel can be fully mixed with the fiber to form a liquid mixture with high fluidity, and bubbles are avoided.
(3) Stirring and mixing again: and (3) placing the mixture in the step (2) and the asphalt and the antioxidant prepared in the step (1) into a mixing container, stirring and mixing at the stirring speed of 180-350rmp for 10-15min, and uniformly stirring to obtain the soft protection glue.
If directly mix the condition together with four kinds of materials of fibre, silica gel, pitch and antioxidant, wherein because pitch is very thick, directly add the fibre and stir, can make to have a large amount of bubbles in the protection flexible glue, the coating is dry behind the natural gas line outer wall, has a large amount of gas pockets in the protection flexible glue after the drying, and then can reduce its intensity.
Further, the environmental temperature of the step (1) and the step (2) is 5-40 ℃, and the relative humidity is not more than 90%.
The technical scheme of the invention also discloses a use method of the protective soft rubber coated outside the natural gas pipeline, which comprises the following steps: and coating the protective soft rubber with the thickness of 2.5-3.5cm on the outer wall of the natural gas pipeline and the joint of the natural gas pipeline, and naturally drying.
Further, the preparation time of the soft protection glue in the steps (1) and (2) is less than or equal to 24 hours, and if the preparation time of the soft protection glue exceeds 24 hours, the soft protection glue can be solidified and cannot be coated on a natural gas pipeline.
The invention has the advantages that:
1. the natural gas pipeline can be effectively protected by the protective soft rubber coated outside the natural gas pipeline, the ring stiffness of the natural gas pipeline is improved, the problem of extrusion deformation and cracking of the natural gas pipeline is effectively prevented, and the service life of the natural gas pipeline is prolonged; meanwhile, the gas leakage and even the explosion safety accidents are reduced, and the potential safety hazards are reduced.
2. The natural gas pipeline can be protected by the protective soft glue coated outside the natural gas pipeline, so that the natural gas pipeline is prevented from being corroded, and the service life of the natural gas pipeline is further prolonged.
3. The preparation method and the use method of the natural gas pipeline external coating protective soft rubber have the advantages of simple construction, easy operation and lower construction cost.
Description of the drawings:
FIG. 1 is a topographical image of a natural gas pipeline according to the present invention; wherein (a) is the natural gas pipeline topology prepared in example 6 and (b) is the natural gas pipeline topology prepared in example 12.
FIG. 2 is a shape image of the soft protection glue according to the present invention; wherein (a) is the appearance of the soft protection glue prepared in example 1, and (b) is the appearance of the soft protection glue prepared in comparative example 1.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to examples.
Example 1: the protective soft rubber coated outside the natural gas pipeline comprises 9g of asphalt, 2g of fiber, 2g of silica gel and 2g of antioxidant, wherein the length of the fiber is 3cm-15cm, and the fiber is polypropylene fiber.
The method for preparing the protective soft glue coated outside the natural gas pipeline specifically comprises the following steps:
(1) preparing raw materials; (2) primarily stirring and mixing; (3) stirring and mixing again;
(1) preparing raw materials: 9g of asphalt, 2g of fiber, 2g of silica gel and 2g of antioxidant;
(2) preliminary stirring and mixing: stirring and mixing 2g of the fibers prepared in the step (1) and 2g of silica gel at the stirring speed of 450-550rmp for 10-15min, and uniformly stirring to obtain a mixture;
(3) stirring and mixing again: and (3) placing the mixture obtained in the step (2), 9g of asphalt and 2g of antioxidant in a mixing container, stirring and mixing at the stirring speed of 180-350rmp for 10-15min, and uniformly stirring to obtain the soft protection glue.
The environmental temperature of the step (1) and the step (2) is 5-40 ℃, and the relative humidity is not more than 90%.
Example 2: the natural gas pipeline external coating protective soft glue comprises 8.25g of asphalt, 1.26g of fiber, 1.26g of silica gel and 1.26g of antioxidant, wherein the length of the fiber is 3cm-15cm, and the fiber is polypropylene fiber.
The method for preparing the protective soft glue coated outside the natural gas pipeline specifically comprises the following steps:
(1) preparing raw materials; (2) primarily stirring and mixing; (3) stirring and mixing again;
(1) preparing raw materials: 8.25g of pitch, 1.26g of fiber, 1.26g of silica gel, 1.26g of antioxidant;
(2) preliminary stirring and mixing: stirring and mixing 1.26g of the fibers prepared in the step (1) and 1.26g of silica gel at the stirring speed of 450-550rmp for 10-15min, and uniformly stirring to obtain a mixture;
(3) stirring and mixing again: and (3) placing the mixture obtained in the step (2), 8.25g of asphalt and 1.26g of antioxidant into a mixing container, stirring and mixing at the stirring speed of 180-350rmp for 10-15min, and uniformly stirring to obtain the soft protection glue.
The environmental temperature of the step (1) and the step (2) is 5-40 ℃, and the relative humidity is not more than 90%.
Example 3: the natural gas pipeline external coating protective soft rubber comprises 9.75g of asphalt, 2.76g of fiber, 2.76g of silica gel and 2.76g of antioxidant, wherein the length of the fiber is 3cm-15cm, and the fiber is polypropylene fiber.
The method for preparing the protective soft glue coated outside the natural gas pipeline specifically comprises the following steps:
(1) preparing raw materials; (2) primarily stirring and mixing; (3) stirring and mixing again;
(1) preparing raw materials: 9.75g of asphalt, 2.76g of fiber, 2.76g of silica gel, 2.76g of antioxidant;
(2) preliminary stirring and mixing: stirring and mixing 2.76g of the fibers prepared in the step (1) and 2.76g of silica gel at the stirring speed of 450-550rmp for 10-15min, and uniformly stirring to obtain a mixture;
(3) stirring and mixing again: and (3) placing the mixture obtained in the step (2), 9.75g of asphalt and 2.76g of antioxidant into a mixing container, stirring and mixing, wherein the stirring speed is 180 and 350rmp, stirring for 10-15min, and uniformly stirring to obtain the soft protection glue.
The environmental temperature of the step (1) and the step (2) is 5-40 ℃, and the relative humidity is not more than 90%.
Example 6: the application method of the protective soft glue coated outside the natural gas pipeline in the embodiment 1 comprises the following steps: coating the outer wall of the natural gas pipeline and the interface thereof with the protective soft rubber with the thickness of 2.5-3.5cm, and naturally drying; the preparation time of the soft protection glue is less than or equal to 24 hours.
Example 7: the use method of the protective soft glue coated outside the natural gas pipeline in the embodiment 2 comprises the following steps: coating the outer wall of the natural gas pipeline and the interface thereof with the protective soft rubber with the thickness of 2.5-3.5cm, and naturally drying; the preparation time of the soft protection glue is less than or equal to 24 hours.
Example 8: the use method of the protective soft glue coated outside the natural gas pipeline in the embodiment 3 comprises the following steps: coating the outer wall of the natural gas pipeline and the interface thereof with the protective soft rubber with the thickness of 2.5-3.5cm, and naturally drying; the preparation time of the soft protection glue is less than or equal to 24 hours.
Example 9: the whole is the same as example 6 except that the length of the fiber in this example is 1 to 3 cm.
Example 10: the whole is the same as example 6 except that the length of the fiber in this example is 16 to 20 cm.
Example 11: the whole body is the same as that of the embodiment 6, except that in the embodiment, the outer wall of the natural gas pipeline and the interface thereof are coated with the soft protection glue with the thickness of 1.5 cm.
Example 12: the whole body is the same as that of the embodiment 6, except that in the embodiment, the outer wall of the natural gas pipeline and the interface thereof are coated with the soft protection glue with the thickness of 4.5 cm.
Comparative example 1: the whole is the same as example 6, except that in the comparative example, 9g of asphalt, 2g of fiber, 2g of silica gel and 2g of antioxidant are all placed in a mixing container to be stirred and mixed, the stirring speed is 180-350rmp, the stirring is carried out for 10-15min, and the protective soft glue is obtained after uniform stirring.
Comparative example 2: and the natural gas pipeline is not coated with the soft protection glue.
Experiment 1:
the ring stiffness tests were performed on the natural gas pipes of examples 6 to 12 and comparative example 1 coated with the soft protection rubber, and on the natural gas pipe of comparative example 2 not coated with the soft protection rubber, the test machine was a hydraulic universal pressure test machine WEW-600B produced by the jinan permanent test industrial equipment company, wherein the specific test results are shown in table 1 below:
TABLE 1 Ring stiffness values for Natural gas pipelines
As can be seen from the above table, the ring stiffness value of comparative example 2 is the lowest, so that the natural gas pipeline which is not coated with the soft protective rubber is prone to failure behaviors such as crushing, buckling and the like; compared with other examples and comparative examples 1 and 2, the ring stiffness of the natural gas pipelines of examples 6 to 8 is higher, which shows that the natural gas pipelines prepared in the examples 6 to 8 of the invention have higher ring stiffness, effectively prevents the natural gas pipelines from extrusion deformation and cracking, and prolongs the service life of the natural gas pipelines; meanwhile, the gas leakage and even the explosion safety accidents are reduced, and the potential safety hazards are reduced.
The ring stiffness of the natural gas pipeline prepared in examples 9 and 10 is lower than that of example 6, which indicates that the ring stiffness of the natural gas pipeline coated with the soft protective rubber cannot achieve the expected effect when the length of the fiber in the raw material is less than 3cm, and the fluidity of the mixture of the soft protective rubber, asphalt, silica gel and an antioxidant is increased, so that the construction is not facilitated; the length of the fiber is higher than 15cm, so that the number of bubbles in the mixture can be increased during mixing and stirring, and the ring rigidity of the protective soft glue coated on the natural gas pipeline can be influenced.
The ring stiffness of the natural gas pipeline prepared in examples 11 and 12 is lower than that of example 6, which indicates that the protective soft rubber coated on the natural gas pipeline is thinner and cannot protect the natural gas pipeline, and the protective soft rubber coated on the natural gas pipeline is thicker and has cracks, so that the ring stiffness of the natural gas pipeline prepared in example 12 is lower than that of example 6 and cannot protect the natural gas pipeline.
Experiment 2: the natural gas pipeline prepared in example 6 and the natural gas pipeline prepared in example 12 are photographed respectively to obtain a topographic image of the natural gas pipeline as shown in fig. 1, and it can be seen from fig. 1 that the natural gas pipeline prepared in example 6 has a smooth surface (as shown in fig. 1 (a)), and the natural gas pipeline prepared in example 12 has a large number of cracks on the surface (as shown in fig. 1 (b)), so that the protective soft glue disclosed in example 6 of the present invention has an optimal coating thickness, and if the protective soft glue is too thick, a large number of cracks occur, and the protective effect on the natural gas pipeline is further reduced.
Experiment 3: the soft protection glue prepared in the example 1 and the soft protection glue prepared in the comparative example 1 are respectively photographed to obtain a soft protection glue shape image shown in fig. 2, and as can be seen from fig. 2, the soft protection glue prepared in the example 1 has fewer bubbles and basically does not have bubbles (as shown in fig. 2 (a)), and the soft protection glue prepared in the comparative example 1 has a large number of bubbles (as shown in fig. 2 (b)), so that the method for preparing the soft protection glue disclosed in the example 1 can effectively reduce the generation of the bubbles.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The protective soft rubber coated outside the natural gas pipeline is characterized by comprising the following raw materials in percentage by mass: 55 to 65 percent of asphalt, 8.4 to 18.4 percent of fiber, 8.3 to 18.3 percent of silica gel, 8.3 to 18.3 percent of antioxidant, and the total of the raw materials is 100 percent.
2. The protective soft rubber coating outside the natural gas pipeline as claimed in claim 1, wherein the length of the fiber is 3cm-15 cm.
3. The natural gas pipeline external coating protective soft rubber as claimed in claim 2, wherein the fiber is polypropylene fiber.
4. The preparation method of the soft protective glue according to any one of claims 1 to 3, which is characterized by comprising the following steps: (1) preparing raw materials; (2) primarily stirring and mixing; (3) stirring and mixing again;
(1) preparing raw materials: preparing the following raw materials in percentage by mass: 55 to 65 percent of asphalt, 8.4 to 18.4 percent of fiber, 8.3 to 18.3 percent of silica gel and 8.3 to 18.3 percent of antioxidant, wherein the total amount of the raw materials is 100 percent;
(2) preliminary stirring and mixing: stirring and mixing the fibers and the silica gel prepared in the step (1) at the stirring speed of 450-550rmp for 10-15min, and uniformly stirring to obtain a mixture;
(3) stirring and mixing again: and (3) placing the mixture in the step (2) and the asphalt and the antioxidant prepared in the step (1) into a mixing container, stirring and mixing at the stirring speed of 180-350rmp for 10-15min, and uniformly stirring to obtain the soft protection glue.
5. The preparation method of the protective soft glue coated outside the natural gas pipeline according to claim 4, wherein the environmental temperature of the step (1) and the step (2) is 5-40 ℃, and the relative humidity is not more than 90%.
6. The use method of the soft protective glue according to any one of claims 1 to 3, characterized by comprising the following steps: and coating the outer wall of the natural gas pipeline and the joint of the natural gas pipeline with the soft protection glue with the thickness of 2.5-3.5cm, and naturally airing.
7. The method for using the soft protection glue coated outside the natural gas pipeline as claimed in claim 6, wherein the preparation time of the soft protection glue in the steps (1) and (2) is less than or equal to 24 hours.
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