CN109822979B - Metering oil pipe for petrochemical industry and preparation method thereof - Google Patents
Metering oil pipe for petrochemical industry and preparation method thereof Download PDFInfo
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- CN109822979B CN109822979B CN201910079814.1A CN201910079814A CN109822979B CN 109822979 B CN109822979 B CN 109822979B CN 201910079814 A CN201910079814 A CN 201910079814A CN 109822979 B CN109822979 B CN 109822979B
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Abstract
The invention discloses a petrochemical metering oil pipe and a preparation method thereof, wherein the petrochemical metering oil pipe comprises a composite barrier layer, a first antistatic plastic layer, a fiber reinforced explosion-proof layer and a second antistatic plastic layer which are sequentially arranged from inside to outside, wherein the composite barrier layer consists of a low-permeability barrier layer, a reinforced barrier layer and a bonding layer positioned between the low-permeability barrier layer and the reinforced barrier layer which are distributed inside and outside. The metering oil pipe for petrochemical engineering not only greatly improves the integral barrier property and environmental protection property by matching the inside and the outside of a plurality of layers of different material layers, but also has excellent antistatic property and comprehensive mechanical properties, such as bending resistance, tensile resistance, compression resistance, explosion resistance and the like, and can be widely applied to the fields of oil product transportation and transportation, automobile fuel systems and the like.
Description
Technical Field
The invention relates to an oil pipe for petrochemical engineering, in particular to a metering oil pipe for petrochemical engineering and a preparation method thereof.
Background
With the enhancement of the awareness of environmental protection and the rigorous implementation of environmental protection laws, environmental protection has covered the control of atmosphere, water, soil, noise, etc. In particular, the pollution to the atmosphere, whether particulate matter such as PM2.5, nitrogen oxides, hydrocarbons, and carbon monoxide, increases with the increase in the sulfur content. Fuel oil pollution is an important pollution source and is increasingly paid more attention.
The contamination of fuel comes from two aspects. On the one hand, the sulfur content in fuel oil is an important source of atmospheric pollution; on the other hand, fuel leakage and leakage volatilization are also important causes of increased hydrocarbons in the atmosphere. Therefore, higher requirements are put on the quality of the fuel and the barrier property and environmental protection property of the metering oil pipe used as a fuel transportation carrier. In order to reduce the sulfur content in fuel oil, the state has implemented a new standard of finished oil nationwide, thereby greatly reducing the sulfur content in oil products.
The metering oil pipe is usually matched with an oiling machine, a metering pump and an oiling vehicle for use, and can also be independently used as a transportation pipeline for fuel transportation. The metering oil pipe is made of rubber, and the materials used in the rubber contain a large amount of sulfur crosslinking agents, additives or plasticizer residues, and the sulfur crosslinking agents, the additives or the plasticizer residues can continuously permeate into oil products in the using process of the oil pipe to pollute the oil products. Finally, the pollutants in the fuel oil exceed the standard and cannot meet the requirement of low emission.
For the oil product to permeate and pollute through the oil pipe, since the beginning of the 80 s in the 20 th century, the scientific community proves the risk of atmospheric pollution caused by the permeation and discharge of hydrocarbon (benzene) through a fuel hose, but the current low-permeability oil pipe technology is not widely applied to the oil product conveying process and draws attention. However, with the enhancement of environmental awareness and the improvement of corresponding national industry standards, the anti-leakage performance of the existing metering oil pipe is not ideal enough, the barrier performance is not good, the environment is not environment-friendly enough, the long-term application is difficult to keep, and the application prospect is not good.
Thus, existing metering tubes are subject to further improvement.
Disclosure of Invention
Aiming at the technical problems, the invention provides the metering oil pipe for the petrochemical industry, which has high barrier property, low pollution and static electricity resistance, and the preparation method thereof.
The invention provides the following technical scheme:
the utility model provides a petrochemical is with measuring oil pipe, its includes from interior compound barrier layer, first antistatic plastic layer 4, the explosion-proof layer of fibre reinforcing 5 and the antistatic plastic layer of second 6 that set gradually outward, and wherein, compound barrier layer comprises inside and outside low permeability barrier layer 1, reinforcing barrier layer 3 that distribute and the tie coat 2 that is located between the two.
In the structure, by matching the low-permeability barrier layer 1 and the reinforced barrier layer 3, sulfides in the antistatic plastic layer and the fiber reinforced explosion-proof layer are prevented from permeating and diffusing to oil products, and the pollution of the sulfides to the oil products is prevented; and prevents oil from permeating outwards, and prevents the pollution of the oil seepage to the environment. And the first antistatic plastic layer 4, the fiber reinforced explosion-proof layer 5 and the second antistatic plastic layer 6 are matched with each other, so that the comprehensive mechanical property and the antistatic property of the metering oil pipe are improved. The metering oil pipe has the advantages that the internal and external matching of the multiple layers of different material layers greatly improves the integral barrier property and environmental protection property, has excellent antistatic property and comprehensive mechanical properties (such as bending resistance, tensile resistance, compression resistance, explosion resistance and the like), and expands the application range of the metering oil pipe for petrochemical industry.
Optionally, the low-permeability barrier layer 1 is a high-barrier thin-film material formed by mixing Polyimide (PI), polyphenylene sulfide (PPS) and polyphenylene oxide (PPO) in a ratio of 1: 2-4: 4-6, and the thickness is 0.05 mm-0.6 mm. The special engineering plastic PI is difficult to process, the PPS is brittle and difficult to form a film, but the special engineering plastic PI has extremely high oil resistance and barrier property, and the synergistic effect of the special engineering plastic PI and the PPS makes the effect better; the PPO added in the proportion is matched with the two materials, so that the processing performance and toughness of the composite material can be obviously improved, and the processing of a film material is facilitated. Too low PPO component can obviously reduce the film forming property of the material, but the barrier property can not be greatly improved, so the high barrier film material is preferably formed by the above proportion.
Wherein, the reinforced barrier layer 3 is mainly prepared from the following raw materials: polyglycolic acid (PGA), polyvinyl alcohol (PVOH), fluoroplastic, nano-montmorillonite and an auxiliary agent. Preferably, the fluoroplastic is PEFE or PFA.
The fluoroplastic in the formula can provide barrier for oil products which are penetrated inwards by sulfur-containing compounds and low molecular substances on the outer layer, the polyvinyl alcohol mainly provides barrier for oxygen and the like, and the polyglycolic acid provides strong barrier effect for oxygen and carbon dioxide gas. The nano montmorillonite clay plays a role in prolonging and obstructing a gas passage in the gas permeation process, thereby reducing the permeation effect. The different components have the combined effect based on the matching of different barrier ways, so that the comprehensive barrier property of the metering oil pipe is improved, and the safety of oil products is ensured. The reinforced barrier layer 3 can be processed into a film layer with a thickness of 0.01mm to 0.8mm by means of extrusion and the like.
Preferably, the reinforced barrier layer 3 is prepared from the following raw materials in parts by weight:
wherein, the auxiliary agent comprises the following components:
the reinforced barrier layer prepared under the condition has the advantages of optimal barrier property and permeation resistance and excellent weather resistance. PVOH has excellent barrier property to oxygen, PGA has excellent barrier property to carbon dioxide, and fluoroplastic and nano montmorillonite have good comprehensive barrier property. The synergistic effect of the composite materials in the above proportions provides barrier properties far below the industry standards for reinforced barrier layers.
Alternatively, the tie layer 2 is selected from maleic anhydride graft modified polyethylene (MAH-g-PE) or epoxy modified silicone adhesive systems. These binder systems are compatible with coextrusion processes, or lamination bonding processes, and facilitate rapid processing. Preferably, the bonding by adopting the epoxy resin modified silicone resin binder system is more efficient; at high temperature, hydroxyl in the silicon resin can react with the epoxy resin to form a highly crosslinked body structure, and the silicon resin has high heat resistance and interlayer bonding strength.
Optionally, the fiber reinforced explosion-proof layer 5 is a single-layer braided layer structure or a stacked structure formed by multiple braided layers, and two adjacent braided layers are vulcanized and bonded into a whole through an antistatic plastic sheet; wherein, the woven layer is one of a carbon fiber layer, a metal wire layer or a woven fabric layer; or, the fiber reinforced explosion-proof layer 5 is a composite woven structure formed by alternately arranging two or three of a carbon fiber layer, a metal wire layer and a woven fabric layer. Wherein, the carbon fiber layer and the metal wire layer are in the form of unidirectional tapes, warp and weft tapes or woven cloth. The thickness of the fiber reinforced explosion-proof layer 5 is 0.5-3.0 mm. The flexibility of the metering oil pipe is enhanced through a multi-layer fiber layer structure formed by bonding plastics together, and the bending resistance, the tensile resistance, the compression resistance, the explosion resistance and other properties are improved. Preferably, the fiber reinforced explosion-proof layer 5 is a three-layer structure, and is formed by sequentially stacking a warp-weft carbon fiber layer, a woven steel wire layer and a warp-weft carbon fiber layer from top to bottom.
Optionally, the first antistatic plastic layer 4 and the second antistatic plastic layer 6 are made of the same material and are prepared from the following components in parts by weight:
0.5-8 parts of antistatic agent;
20-80 parts of thermoplastic elastomer (TPE);
30-70 parts of a general rubber material;
0.1-3.0 parts of a coupling agent;
0.1-12 parts of a compatilizer;
0.2-2.0 parts of a lubricant;
0.2-1.5 parts of antioxidant;
0.2-15 parts of an anti-wear agent.
Wherein, the antistatic agent is one or a combination of more of quaternary ammonium salt, amine stearate, ethoxylated fatty alkylamine and oleamide; thermoplastic elastomers (TPEs) including but not limited to one or a combination of EPDM, SBS, SEBS, TPV, SBC, SBR; general purpose rubber (GR) materials include, but are not limited to, one or a combination of more of styrene butadiene rubber, butadiene cyanide rubber, neoprene rubber, natural gums.
In the formula, the natural rubber has excellent low temperature resistance and wear resistance, but the ageing resistance is slightly poor; after the antistatic agent is matched with a thermoplastic elastomer material and an antistatic agent, the aging resistance of the material is improved, the processability of the material is improved, the material is easy to form and process by an extrusion process and the like, and the production efficiency is improved; more importantly, the antistatic property of the material is also improved.
Optionally, the mass ratio of the TPE to the GR is 1: 1.5-7. The TPE accounts for a lower part, increases the processing performance and the aging resistance of the material, has good compatibility with the antistatic agent and is not easy to separate out; GR is a large part, and has better low-temperature resistance, so that the flexibility of the material is mainly provided. The two components are respectively grown, and the multifunctional property of the antistatic plastic layer is endowed.
In a preferred embodiment, 3 parts of ethoxylated aliphatic alkylamine is selected as the antistatic agent, 75 parts of butadiene cyanide rubber is selected as the general rubber material, and 22 parts of SBS is selected as the thermoplastic elastomer.
Optionally, the first antistatic plastic layer has a thickness of 0.5 to 3.0mm, and the second antistatic plastic layer has a thickness of 0.5 to 5.0 mm.
Optionally, the second antistatic plastic layer 6 is further covered with at least one layer of repeating film unit composed of the fiber reinforced explosion-proof layer 5 and the second antistatic plastic 6, so as to further improve the antistatic, bending-resistant, tensile-resistant, pressure-resistant, explosion-resistant and other properties of the metering oil pipe, for example, the metering oil pipe with an 8-layer or 10-layer structure is formed.
The invention also provides a preparation method of the metering oil pipe for petrochemical engineering, which comprises the following specific steps:
s1, preparing a raw material of a reinforced barrier layer and two raw materials of antistatic plastic layers respectively;
s2, forming a primary composite oil pipe by the low-permeability barrier layer 1, the bonding layer 2, the reinforced barrier layer 3 and the first antistatic plastic layer 4 through a multilayer co-extrusion process, and compounding and extruding different layers of raw materials in a machine head to form a multilayer concentric primary composite oil pipe after the raw materials of different layers are melted and plasticized in different extruders;
s3, pressing the antistatic plastic layer raw material into an antistatic plastic sheet by a calender;
s4, coating the prepared primary composite oil pipe on a soft core or a hard core coated with a release agent; winding or weaving at least one layer of woven layer on the outer surface of the primary composite oil pipe by a winding machine or a weaving machine, and synchronously winding the antistatic plastic sheet between every two layers of woven layers by the winding machine or the weaving machine to form a middle-grade composite oil pipe;
and S5, coating the second antistatic plastic layer 6 on the surface of the middle-level composite oil pipe on the extruder again, putting the middle-level composite oil pipe into a steam vulcanizing tank, and removing the pipe core after vulcanization treatment to obtain the petrochemical metering oil pipe.
Alternatively, the raw material of the reinforced barrier layer 3 is prepared as follows:
mixing polyglycolic acid (PGA), polyvinyl alcohol (PVOH), fluoroplastic, nano montmorillonite and an auxiliary agent in a high-speed mixer for 10min at the rotating speed of 100-150 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation at the granulation temperature of 190-210 ℃ and the screw rotating speed of 100-500 rpm, performing water cooling granulation, and drying the obtained granules at the temperature of 80 ℃ for 4 hours to obtain the raw material of the reinforced barrier layer.
Optionally, the preparation method of the antistatic plastic layer raw material comprises the following steps:
mixing an antistatic agent, a thermoplastic elastomer, a general rubber material, a coupling agent, a compatilizer, a lubricant, an antioxidant and an abrasion-resistant agent in a high-speed mixer for 5min at the rotating speed of 100-150 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation, wherein the granulation temperature is 160-190 ℃, the screw rotation speed is 100-300 rpm, granulating by adopting a water ring, and drying the obtained granules at 60 ℃ for 4 hours to obtain the antistatic plastic layer raw material.
The antistatic plastic layer raw materials are used for preparing a first antistatic plastic layer 4, a second antistatic plastic layer 6 and an antistatic plastic sheet.
Optionally, in the above step, the vulcanization temperature is 150-: providing a suitable balance of cure speed and production efficiency. The crosslinking density of rubber molecular chains is ensured, and the mechanical property of the rubber material is improved; the bonding strength of the rubber and the woven layer is improved; the balance of the temperature difference between the inside and the outside of the product and the uniform vulcanization are ensured.
The metering oil pipe for petrochemical industry provided by the embodiment of the invention has the following beneficial effects:
1. by arranging the composite barrier layer structure formed from the reinforced barrier layer to the low-permeability barrier layer, the fuel resistance and the high-temperature resistance of the metering oil pipe are obviously higher than those of the existing rubber oil pipe, the strength of the metering oil pipe is better than that of the existing rubber oil pipe adopting a fluorine material scheme, and the fuel resistance of the oil pipe is obviously improved by adopting the metering oil pipe; on the other hand, the enhanced barrier layer and the low-permeability barrier layer do not contain low-molecular sulfide capable of migrating and permeating, so that the problem of oil pollution is solved.
2. The invention solves the problem of pollution of the fuel pipe from two aspects:
on one hand, the reinforced barrier layer and the low-permeability barrier layer are matched to prevent sulfide in the antistatic plastic layer and the fiber reinforced explosion-proof layer from permeating and diffusing to oil products, so that an oil product pollution source is blocked. Therefore, compared with the oil pipe with the rubber inner layer in the prior art, the metering oil pipe can effectively avoid the pollution of the pipe body to oil products.
On the other hand, the low-permeability barrier layer can prevent oil products from permeating outwards, and the pollution of the oil products to the environment is prevented. The oil product permeates to the atmosphere through the pipe wall of the oil pipe, so that not only can great energy waste be caused, but also the atmosphere is polluted.
3. The metering oil pipe has excellent environmental protection performance and antistatic performance, can basically realize zero emission of hydrocarbon (such as benzene), and effectively solves the problems that the existing oil pipe is easy to pollute oil products, fuel oil is easy to leak and pollutes the environment; in addition, the use safety performance is improved, and the safety accident caused by discharge due to excessive static charge accumulation of the conventional oil pipe is avoided; based on the performance advantages, the metering oil pipe can be widely applied to the fields of oil product transportation and transportation, automobile fuel systems and the like.
Drawings
FIG. 1 is a schematic view of a metering tube for petrochemical engineering according to the present invention;
wherein, 1 hyposmosis barrier layer, 2 tie coats, 3 reinforcing barrier layers, 4 first antistatic plastic layers, 5 fibre reinforcing explosion-proof layers, 6 second antistatic plastic layers.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used in this specification, the terms "vertical," "horizontal," "left," "right," "up," "down," "inner," "outer," "bottom," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1:
1. the embodiment provides a petrochemical industry is with measuring oil pipe, it includes following six layer structure from inside to outside:
And the bonding layer 2 is 0.05mm thick and is a maleic anhydride grafted modified polyethylene (MAH-g-PE) bonding layer.
The reinforced barrier layer 3 is 0.2mm thick and is prepared from the following components in parts by mass:
other auxiliary agents are:
the first antistatic plastic layer 4 is 1.5mm thick and is prepared from the following components in parts by mass:
3 parts of an antistatic agent;
32 parts of thermoplastic elastomer (TPE);
65 parts of a general rubber material;
0.5 part of a coupling agent;
0.5 part of a compatilizer;
0.6 part of a lubricant;
0.3 part of antioxidant;
0.8 part of wear-resisting agent.
The fiber reinforced explosion-proof layer 5 is 0.65mm thick and is formed by a three-layer structure which is composed of a warp and weft carbon fiber layer, a woven steel wire layer and a warp and weft carbon fiber layer.
The second antistatic plastic layer 6 has a thickness of 1.5mm and is made of the same material as the first antistatic plastic layer 4.
In the structure, the low-permeability barrier layer 1 and the reinforcing barrier layer 3 are primarily bonded through the bonding layer 2, and the low-permeability barrier layer 1, the bonding layer 2, the reinforcing barrier layer 3, the first antistatic plastic layer 4, the fiber-reinforced explosion-proof layer 5 and the second antistatic plastic layer 6 are connected into a whole through a multilayer co-extrusion process and a vulcanization process.
2. The embodiment also provides a preparation method of the measuring oil pipe for petrochemical engineering, which specifically comprises the following steps:
s1, preparing a raw material of a reinforced barrier layer and two raw materials of antistatic plastic layers respectively;
A. the preparation method of the raw material of the reinforced barrier layer 3 comprises the following steps:
mixing polyglycolic acid, polyvinyl alcohol (PVOH), fluoroplastic (PEFE or PFA), nano montmorillonite, an accelerant, a cross-linking agent, an anti-aging agent and a compatilizer in corresponding mass parts in a high-speed mixer for 10min at the rotating speed of 100-150 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation, wherein the granulation temperature is 190 ℃, the screw rotating speed is 180rpm, water-cooling granulation is adopted, and the obtained granules are dried at 80 ℃ for 4 hours to obtain the raw material of the reinforced barrier layer.
B. The preparation method of the antistatic plastic layer comprises the following steps:
mixing the antistatic agent, the thermoplastic elastomer, the general rubber material, the coupling agent, the compatilizer, the lubricant, the antioxidant and the wear-resisting agent in corresponding parts by mass in a high-speed mixer for 5min at the rotating speed of 150 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation, wherein the granulation temperature is 190 ℃, the screw rotating speed is 180rpm, granulating by adopting a water ring, and drying the obtained granules at 60 ℃ for 4 hours to obtain the antistatic plastic layer raw material.
S2, forming a primary composite oil pipe by the low-permeability barrier layer 1, the bonding layer 2, the reinforced barrier layer 3 and the first antistatic plastic layer 4 through a multilayer co-extrusion process, and compounding and extruding different layers of raw materials in a machine head to form a multilayer concentric primary composite oil pipe after the raw materials of different layers are melted and plasticized in different extruders;
s3, pressing the antistatic plastic layer raw material into an antistatic plastic sheet by a calender;
s4, coating the prepared primary composite oil pipe on a soft core or a hard core coated with a release agent; winding or weaving at least one layer of woven layer on the outer surface of the primary composite oil pipe by a winding machine or a weaving machine, and synchronously winding the antistatic plastic sheet between every two layers of woven layers by the winding machine or the weaving machine to form a middle-grade composite oil pipe;
and S5, coating the second antistatic plastic layer on the surface of the middle-level composite oil pipe on the extruder again, putting the middle-level composite oil pipe into a steam vulcanizing tank for vulcanization treatment at the vulcanization temperature of 180 ℃ for 8 hours, and removing the pipe core to obtain the petrochemical metering oil pipe.
Example 2
1. The embodiment provides a petrochemical industry is with measuring oil pipe, it includes following six layer structure from inside to outside:
the low-permeability barrier layer 1 is 0.33mm thick and is prepared from the following components in parts by mass: PI: PPS: PPO 1: 3: 4.5 mass ratio.
And the bonding layer 2 is 0.05mm thick and is a maleic anhydride grafted modified polyethylene (MAH-g-PE) bonding layer.
The reinforced barrier layer 3 is 0.15mm thick and is prepared from the following components in parts by mass:
other auxiliary agents are:
the first antistatic plastic layer 4 is 1.0mm thick and is prepared from the following components in parts by mass:
3 parts of an antistatic agent;
45 parts of thermoplastic elastomer (TPE);
52 parts of a general rubber material;
0.5 part of a coupling agent;
0.5 part of a compatilizer;
0.4 part of a lubricant;
0.3 part of antioxidant;
and 1 part of an anti-wear agent.
The fiber reinforced explosion-proof layer 5 is 0.45mm thick and is formed by a three-layer structure which is composed of a warp and weft carbon fiber layer, a woven steel wire layer and a warp and weft carbon fiber layer.
The second antistatic plastic layer 6 is 1.8mm thick and is made of the same material as the first antistatic plastic layer 4.
In the structure, the low-permeability barrier layer 1 and the reinforcing barrier layer 3 are primarily bonded through the bonding layer 2, and the low-permeability barrier layer 1, the bonding layer 2, the reinforcing barrier layer 3, the first antistatic plastic layer 4, the fiber-reinforced explosion-proof layer 5 and the second antistatic plastic layer 6 are connected into a whole through a multilayer co-extrusion process and a vulcanization process.
2. The embodiment also provides a preparation method of the measuring oil pipe for petrochemical engineering, which specifically comprises the following steps:
s1, preparing a raw material of a reinforced barrier layer and two raw materials of antistatic plastic layers respectively;
A. the preparation method of the raw material of the reinforced barrier layer 3 comprises the following steps:
mixing the polyglycolic acid, polyvinyl alcohol (PVOH), fluoroplastic (PEFE or PFA), nano-montmorillonite, accelerator, cross-linking agent, anti-aging agent and compatilizer in parts by weight in a high-speed mixer for 10min at the rotating speed of 100 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation at 185 ℃ at the screw rotating speed of 200rpm, performing water-cooling granulation, and drying the obtained granules at 80 ℃ for 4 hours to obtain the raw material of the reinforced barrier layer.
B. The preparation method of the antistatic plastic layer comprises the following steps:
mixing the antistatic agent, the thermoplastic elastomer, the general rubber material, the coupling agent, the compatilizer, the lubricant, the antioxidant and the wear-resisting agent in corresponding parts by mass in a high-speed mixer for 5min at the rotating speed of 150 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation, wherein the granulation temperature is 165 ℃, the screw rotating speed is 150rpm, granulating by adopting a water ring, and drying the obtained granules at 60 ℃ for 4 hours to obtain the antistatic plastic layer raw material.
S2, forming a primary composite oil pipe by adopting a multilayer co-extrusion process through the low-permeability barrier layer 1, the bonding layer 2, the reinforced barrier layer 3 and the first antistatic plastic layer 4, and compounding and extruding the materials in a machine head to form a multilayer concentric primary composite oil pipe after the materials are melted and plasticized in different extruders;
s3, processing the mixture into second antistatic plastics 6 by an open mill or an internal mixer respectively; pressing into antistatic plastic sheet with a calender;
s4, coating the primary composite oil pipe manufactured in the step 1 on a soft core or a hard core coated with a release agent; winding or weaving at least one layer of woven layer on the outer surface of the primary composite oil pipe by a winding machine or a weaving machine, and synchronously winding the antistatic plastic sheet between every two layers of woven layers by the winding machine or the weaving machine to form a middle-grade composite oil pipe;
and S5, coating the second antistatic plastic layer on the surface of the middle-level composite oil pipe on the extruder again, putting the middle-level composite oil pipe into a steam vulcanizing tank for vulcanizing at the vulcanizing temperature of 160 ℃ for 16 hours, and removing the pipe core to obtain the petrochemical metering oil pipe.
Example 3
1. The embodiment provides a petrochemical industry is with measuring oil pipe, it includes following six layer structure from inside to outside:
the low-permeability barrier layer 1 is 0.40mm thick and is prepared from the following components in parts by mass: PI: PPS: PPO 1: 3: 5.5 mass ratio.
And the bonding layer 2 is 0.05mm thick and is a maleic anhydride grafted modified polyethylene (MAH-g-PE) bonding layer.
The reinforced barrier layer 3 is 0.08mm thick and is prepared from the following components in parts by mass:
other auxiliary agents are:
0.8 part of anti-aging agent;
0.6 part of an accelerator;
0.5 part of a crosslinking agent;
0.3 part of lubricant.
The first antistatic plastic layer 4 is 1.6mm thick and is prepared from the following components in parts by mass:
5 parts of an antistatic agent;
25 parts of thermoplastic elastomer (TPE);
70 parts of a general rubber material;
0.5 part of a compatilizer;
0.5 part of a coupling agent;
0.4 part of a lubricant;
0.3 part of antioxidant;
0.8 part of wear-resisting agent;
the fiber reinforced explosion-proof layer 5 is 0.65mm thick and is formed by a three-layer structure which is composed of a warp and weft carbon fiber layer, a woven steel wire layer and a warp and weft carbon fiber layer. The second antistatic plastic layer 6 has a thickness of 2.4mm and is made of the same material as the first antistatic plastic layer 4.
In the structure, the low-permeability barrier layer 1 and the reinforcing barrier layer 3 are primarily bonded through the bonding layer 2, and the low-permeability barrier layer 1, the bonding layer 2, the reinforcing barrier layer 3, the first antistatic plastic layer 4, the fiber-reinforced explosion-proof layer 5 and the second antistatic plastic layer 6 are connected into a whole through a multilayer co-extrusion process and a vulcanization process.
2. The embodiment also provides a preparation method of the measuring oil pipe for petrochemical engineering, which specifically comprises the following steps:
s1, preparing a raw material of a reinforced barrier layer and two raw materials of antistatic plastic layers respectively;
A. the preparation method of the raw material of the reinforced barrier layer 3 comprises the following steps:
mixing polyglycolic acid, polyvinyl alcohol (PVOH), fluoroplastic (PEFE or PFA), nano montmorillonite, accelerator, cross-linking agent, anti-aging agent and compatilizer in corresponding mass parts in a high-speed mixer for 10min at the rotating speed of 100 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation at the granulation temperature of 195 ℃ and the screw rotating speed of 150rpm, performing water-cooling granulation, and drying the obtained granules at the temperature of 80 ℃ for 4 hours to obtain the raw material of the reinforced barrier layer.
B. The preparation method of the antistatic plastic layer comprises the following steps:
mixing the antistatic agent, the thermoplastic elastomer, the general rubber material, the coupling agent, the compatilizer, the lubricant, the antioxidant and the wear-resisting agent in corresponding parts by mass in a high-speed mixer for 5min at the rotating speed of 150 rpm;
and then adding the mixed material into a parallel double-screw extruder from a main feeding port for granulation at the granulation temperature of 170 ℃ and the screw rotating speed of 200rpm, granulating by adopting a water ring, and drying the obtained granules at the temperature of 60 ℃ for 4 hours to obtain the antistatic plastic layer raw material.
S2, forming a primary composite oil pipe by adopting a multilayer co-extrusion process through the low-permeability barrier layer 1, the bonding layer 2, the reinforced barrier layer 3 and the first antistatic plastic layer 4, and compounding and extruding the materials in a machine head to form a multilayer concentric primary composite oil pipe after the materials are melted and plasticized in different extruders;
s3, processing the mixture into second antistatic plastics 6 by an open mill or an internal mixer respectively; pressing into antistatic plastic sheet with a calender;
s4, coating the primary composite oil pipe manufactured in the step 1 on a soft core or a hard core coated with a release agent; winding or weaving at least one layer of woven layer on the outer surface of the primary composite oil pipe by a winding machine or a weaving machine, and synchronously winding the antistatic plastic sheet between every two layers of woven layers by the winding machine or the weaving machine to form a middle-grade composite oil pipe;
and S5, coating the second antistatic plastic layer on the surface of the middle-level composite oil pipe on the extruder again, putting the middle-level composite oil pipe into a steam vulcanizing tank for vulcanizing at the vulcanizing temperature of 175 ℃ for 12 hours, and removing the pipe core to obtain the petrochemical metering oil pipe.
Comparative example 1
The embodiment provides a low pollution type is rubber oil pipe for oiling machine, including outside rubber layer and inside rubber layer, be provided with between two-layer and weave the enhancement layer, thickness 3.5 mm. Wherein, the inner rubber layer is provided with a fluoroplastic layer (PFA6502TZ) produced by 3M company (Minnesota Mining and Manufacturing, Minnesota Mining and Manufacturing company).
Wherein the thickness of the 3M fluoroplastic layer is 0.35 mm. The braided reinforcing layer is of a 3-layer structure, a rubber bonding layer is arranged between the two braided reinforcing layers, the braided layer is of a steel wire braided belt structure, and the thickness of the braided layer is 0.95 mm.
The rubber is produced by respectively processing the rubber into inner and outer layer rubber compounds by an open mill and an internal mixer. Extruding the fluoroplastic on a soft core or a hard core coated with a release agent on an extruder, and winding or weaving at least one steel wire layer on the outer surface by a winding machine or a weaving machine. And extruding the rubber to the outer layer by a cold feed extruder to form an outer layer coating layer.
And putting the tube blank into a steam vulcanizing tank for vulcanization treatment. And (3) removing the tube core at the vulcanization temperature of 150 ℃ for 6 hours to obtain the low-pollution rubber oil pipe for the oiling machine.
Test examples
The performance tests were performed on the oil pipes prepared in examples 1-3 and comparative example, respectively, according to the following criteria:
HG/T3037-;
GB/T8019-2008 determination of fuel colloid content;
SH T0689-2000 total assay method for light hydrocarbon, engine fuel and other oil products;
GB/T15738-;
the test results are shown in the following table:
the petrochemical engineering metering oil pipe prepared by the 3 embodiments has the following technical indexes: pipe diameter: DN 15-50 (mm); the bearing pressure range is as follows: 0.8-28 MPA; temperature resistance: -40 ℃ to 120 ℃.
The experimental data show that compared with the rubber oil pipe for the low-pollution type oiling machine in the comparative example 1, the permeation resistance of the metering oil pipe for petrochemical industry provided by the invention is remarkably improved, and the sulfur content of the oil pipe is greatly reduced, so that the metering oil pipe has more excellent environmental protection performance; meanwhile, tensile strength, wear resistance and antistatic performance indexes of the petrochemical metering oil pipe are improved, the overall comprehensive mechanical performance is improved, the service life is prolonged, the use safety performance is improved, safety accidents caused by discharge due to excessive static charge accumulation of a conventional oil pipe are avoided, and the application range of the petrochemical metering oil pipe is expanded.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
It should be understood that the technical solutions and concepts of the present invention may be equally replaced or changed by those skilled in the art, and all such changes or substitutions should fall within the protection scope of the appended claims.
Claims (9)
1. The metering oil pipe for the petrochemical industry is characterized by comprising a composite barrier layer, a first antistatic plastic layer (4), a fiber reinforced explosion-proof layer (5) and a second antistatic plastic layer (6) which are sequentially arranged from inside to outside, wherein the composite barrier layer is composed of a low-permeability barrier layer (1), a reinforced barrier layer (3) and a bonding layer (2) positioned between the low-permeability barrier layer and the reinforced barrier layer; the low-permeability barrier layer (1) is a high-barrier film material and is prepared by mixing Polyimide (PI), polyphenylene sulfide (PPS) and polyphenylene oxide (PPO) in a ratio of 1: 2-4: 4-6 in mass ratio.
2. The petrochemical metering tubing according to claim 1, wherein the reinforced barrier layer (3) is prepared from the following raw materials: polyglycolic acid (PGA), polyvinyl alcohol (PVOH), fluoroplastic, nano-montmorillonite and an auxiliary agent.
3. The petrochemical metering oil pipe according to claim 2, wherein the reinforced barrier layer (3) is prepared from the following raw materials in parts by weight:
wherein, the auxiliary agent comprises the following components:
4. the petrochemical metering tubing of claim 1, wherein the tie-layer (2) is selected from the group consisting of maleic anhydride graft modified polyethylene (MAH-g-PE), epoxy modified silicone adhesive systems.
5. The petrochemical metering oil pipe according to claim 1, wherein the fiber reinforced explosion-proof layer (5) is a single-layer braided layer structure or a stacked structure formed by a plurality of braided layers, and two adjacent braided layers are vulcanized and bonded into a whole through an antistatic plastic sheet; wherein, the woven layer is one of a carbon fiber layer, a metal wire layer or a woven fabric layer; or the fiber reinforced explosion-proof layer (5) is a composite woven structure formed by alternately arranging two or three of a carbon fiber layer, a metal wire layer and a woven fabric layer.
6. The petrochemical metering oil pipe according to claim 1, wherein the first antistatic plastic layer (4) and the second antistatic plastic layer (6) are made of the same material and are prepared from the following raw materials in parts by weight:
0.5-8 parts of antistatic agent;
20-80 parts of thermoplastic elastomer (TPE);
30-70 parts of general rubber material (GR);
0.1-3.0 parts of a coupling agent;
0.1-12 parts of a compatilizer;
0.2-2.0 parts of a lubricant;
0.2-1.5 parts of antioxidant;
0.2-15 parts of a wear-resisting agent;
wherein, the antistatic agent is one or a combination of more of quaternary ammonium salt, amine stearate, ethoxylated fatty alkylamine and oleamide; thermoplastic elastomers (TPEs) including but not limited to one or a combination of EPDM, SBS, SEBS, TPV, SBC, SBR; general purpose rubber (GR) materials include, but are not limited to, one or a combination of more of styrene butadiene rubber, butadiene cyanide rubber, neoprene rubber, natural gums.
7. The petrochemical metering tube according to claim 1, wherein the second antistatic plastic layer (6) is further provided with at least one layer of repeating thin film unit consisting of the fiber reinforced explosion-proof layer (5) and the second antistatic plastic (6) which are distributed inside and outside.
8. The preparation method of the petrochemical metering oil pipe according to claim 1, comprising the following steps:
s1, preparing a raw material of a reinforced barrier layer and two raw materials of antistatic plastic layers respectively;
s2, forming a primary composite oil pipe by a low-permeability barrier layer (1), a bonding layer (2), a reinforced barrier layer (3) and a first antistatic plastic layer (4) through a multilayer co-extrusion process, and compounding and extruding different layers of raw materials in a machine head to form a multilayer concentric primary composite oil pipe after the different layers of raw materials are melted and plasticized in different extruders;
s3, pressing the antistatic plastic layer raw material into an antistatic plastic sheet by a calender;
s4, coating the prepared primary composite oil pipe on a soft core or a hard core coated with a release agent; winding or weaving at least one layer of woven layer on the outer surface of the primary composite oil pipe by a winding machine or a weaving machine, and synchronously winding the antistatic plastic sheet between every two layers of woven layers by the winding machine or the weaving machine to form a middle-grade composite oil pipe;
and S5, coating the second antistatic plastic layer (6) on the surface of the middle-level composite oil pipe on the extruder again, putting the middle-level composite oil pipe into a steam vulcanizing tank, and removing the pipe core after vulcanization treatment to obtain the petrochemical metering oil pipe.
9. The preparation method of the metering oil pipe for petrochemical engineering as claimed in claim 8, wherein in step (5), the vulcanization temperature is 150 ℃ and 250 ℃ and the vulcanization time is 3-20 hours.
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