CN111255957A - High-pressure-resistance tetrafluoride pipe and preparation method thereof - Google Patents
High-pressure-resistance tetrafluoride pipe and preparation method thereof Download PDFInfo
- Publication number
- CN111255957A CN111255957A CN201911362318.3A CN201911362318A CN111255957A CN 111255957 A CN111255957 A CN 111255957A CN 201911362318 A CN201911362318 A CN 201911362318A CN 111255957 A CN111255957 A CN 111255957A
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- Prior art keywords
- stainless steel
- steel wire
- tetrafluoride
- tetrafluoride pipe
- tube
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Classifications
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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
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
Abstract
The invention discloses a high-pressure-resistance tetrafluoride pipe and a preparation method thereof, wherein n layers of stainless steel wires are woven outside the tetrafluoride pipe, wherein n is more than or equal to 1 and n is less than or equal to 3; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, the weaving angle of the stainless steel wire at the innermost layer is theta, wherein the theta is more than 60 degrees and more than 52 degrees. The pressure resistance of the tetrafluoride pipe can be greatly increased by the embedded stainless steel wire woven mesh; meanwhile, the installation of joints at two ends can be omitted, the manufacturing process is simple, the stainless steel wire can be cut at random for use, and the phenomenon that the polytetrafluoroethylene tube layer is separated from the stainless steel wire woven layer cannot occur in the using process. Wherein, the stainless steel wire layer is set to be 1-3 layers, which can ensure the strength of the tetrafluoride tube to the maximum extent, and the bending of the tetrafluoride tube can be influenced by overlarge number of layers. The pressure resistance of the tetrafluoride pipe with the weaving angle of between 52 and 60 degrees is the best.
Description
Technical Field
The invention relates to a pipe production technology, in particular to a high-pressure-resistance tetrafluoride pipe and a preparation process thereof.
Background
The polytetrafluoroethylene tube is a polytetrafluoroethylene tube with good chemical stability, corrosion resistance, high lubrication non-adhesiveness and good ageing resistance. The prepared polytetrafluoroethylene tube, rod, belt, film and the like are widely applied to the fields of machinery, chemical engineering, aviation, electrical and electronic, national defense industry, advanced science and technology, medical health, electrical insulation and the like.
In order to increase the pressure bearing capacity of the tetrafluoro tube, it is usually compounded with a steel wire for the purpose of increasing the pressure bearing capacity thereof. The existing tetrafluoride pipe with the stainless steel wire woven outside must be jointed at the end part to avoid falling off during operation, so that the operation is relatively complicated, and the resource loss is increased.
Disclosure of Invention
The invention aims to provide a high-pressure-resistance tetrafluoride pipe aiming at the defects in the prior art, increase the pressure resistance of the high-pressure-resistance tetrafluoride pipe and provide a corresponding preparation process, so that the high-pressure-resistance tetrafluoride pipe is prevented from falling off on the basis of connecting joints at two ends of the tetrafluoride pipe when being braided by stainless steel wires.
The technical scheme of the invention is as follows: the high-pressure-resistance tetrafluoride pipe is characterized in that n layers of stainless steel wires are woven outside the tetrafluoride pipe, wherein n is more than or equal to 1 and n is less than or equal to 3; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, the weaving angle of the stainless steel wire at the innermost layer is theta, wherein the theta is more than 60 degrees and more than 52 degrees.
Further, 1 layer of stainless steel wire is woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 60 degrees.
Further, 2 layers of stainless steel wires are woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 55 degrees.
Further, 3 layers of stainless steel wires are woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 52 degrees.
Further, the preparation method of the high-pressure-resistance tetrafluoride pipe comprises the following steps:
step one, constant temperature treatment of raw materials: grinding and mixing 95 parts of polytetrafluoroethylene dispersion resin and 5 parts of extrusion auxiliary agent at normal temperature, and curing at constant temperature of 35-45 ℃ for 48 hours;
step two, embryo pressing: guiding the cured polytetrafluoroethylene dispersion resin and the extrusion auxiliary agent into a material cavity of a blank making machine to make a blank;
step three, extrusion pushing: feeding the pre-pressed blank into a material cavity of an extruder to prepare a polytetrafluoroethylene layer serving as an inner container;
step four, drying and cooling: cooling and forming the extruded tetrafluoride pipe;
weaving in the fifth step: pressing a glowing stainless steel wire mesh grid formed by weaving on the tetrafluoride tube, wherein the depth of the glowing stainless steel wire mesh grid is one third of the thickness of the stainless steel wire mesh grid, and the temperature of the stainless steel wire mesh grid is 400-450 ℃;
step six, cooling and forming;
and seventhly, deoiling, drying and shaping.
And furthermore, the step five of weaving is carried out, and during operation, the molten state of the tetrafluoride pipe is attached to one side of the operation of the tetrafluoride pipe.
The invention has the beneficial effects that:
the pressure resistance of the tetrafluoride pipe can be greatly increased by the embedded stainless steel wire woven mesh; meanwhile, the installation of joints at two ends can be omitted, the manufacturing process is simple, the stainless steel wire can be cut at random for use, and the phenomenon that the polytetrafluoroethylene tube layer is separated from the stainless steel wire woven layer cannot occur in the using process. Wherein, the stainless steel wire layer is set to be 1-3 layers, which can ensure the strength of the tetrafluoride tube to the maximum extent, and the bending of the tetrafluoride tube can be influenced by overlarge number of layers. The pressure resistance of the tetrafluoride pipe with the weaving angle of between 52 and 60 degrees is the best.
Drawings
The various properties of the tetrafluoride tube were tested:
FIG. 1 is a graph showing the strength of the tetrafluoride tube according to the present invention varying with the knitting angle;
FIG. 2 is a graph showing the strength of the tetrafluoride tube according to the present invention varying with the number of layers of the stainless steel wire braid;
fig. 3 is a curve showing the variation of the degree of bending of the tetrafluoro pipe according to the number of layers of the stainless steel wire braid layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "front", "back", "vertical", "left", "right", "upper", "lower", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Example 1
The high-pressure-resistance tetrafluoride pipe is characterized in that 1 layer of stainless steel wires are woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 60 degrees.
The preparation process comprises the following steps:
step one, constant temperature treatment of raw materials: grinding and mixing 95 parts of polytetrafluoroethylene dispersion resin and 5 parts of extrusion auxiliary agent at normal temperature, and curing at constant temperature of 35 ℃ for 48 hours;
step two, embryo pressing: guiding the cured polytetrafluoroethylene dispersion resin and the extrusion auxiliary agent into a material cavity of a blank making machine to make a blank;
step three, extrusion pushing: feeding the pre-pressed blank into a material cavity of an extruder to prepare a polytetrafluoroethylene layer serving as an inner container;
step four, drying and cooling: cooling and forming the extruded tetrafluoride pipe;
weaving in the fifth step: pressing a glowing stainless steel wire mesh grid formed by weaving on a tetrafluoride tube, wherein the depth of the glowing stainless steel wire mesh grid is one third of the thickness of the stainless steel wire mesh grid, and the glowing stainless steel wire mesh grid is adhered to one side of the tetrafluoride tube in a molten state, and the temperature of the stainless steel wire mesh grid is 400 ℃;
step six, cooling and forming;
and seventhly, deoiling, drying and shaping.
And furthermore, the step five of weaving is carried out, and during operation, the molten state of the tetrafluoride pipe is attached to one side of the operation of the tetrafluoride pipe.
Example 2
The high-pressure-resistance tetrafluoride pipe is characterized in that 2 layers of stainless steel wires are woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 55 degrees.
The preparation process comprises the following steps:
step one, constant temperature treatment of raw materials: grinding and mixing 95 parts of polytetrafluoroethylene dispersion resin and 5 parts of extrusion auxiliary agent at normal temperature, and curing at 40 ℃ for 48 hours;
step two, embryo pressing: guiding the cured polytetrafluoroethylene dispersion resin and the extrusion auxiliary agent into a material cavity of a blank making machine to make a blank;
step three, extrusion pushing: feeding the pre-pressed blank into a material cavity of an extruder to prepare a polytetrafluoroethylene layer serving as an inner container;
step four, drying and cooling: cooling and forming the extruded tetrafluoride pipe;
weaving in the fifth step: pressing a glowing stainless steel wire mesh grid formed by weaving on a tetrafluoride pipe, wherein the depth of the glowing stainless steel wire mesh grid is one third of the thickness of the stainless steel wire mesh grid, and a molten state of the tetrafluoride pipe is adhered to one side of the tetrafluoride pipe, and the temperature of the stainless steel wire mesh grid is 420 ℃;
step six, cooling and forming;
and seventhly, deoiling, drying and shaping.
Example 3
The high-pressure-resistance tetrafluoride pipe is characterized in that 3 layers of stainless steel wires are woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 52 degrees.
The preparation process comprises the following steps:
step one, constant temperature treatment of raw materials: grinding and mixing 95 parts of polytetrafluoroethylene dispersion resin and 5 parts of extrusion auxiliary agent at normal temperature, and curing at the constant temperature of 45 ℃ for 48 hours;
step two, embryo pressing: guiding the cured polytetrafluoroethylene dispersion resin and the extrusion auxiliary agent into a material cavity of a blank making machine to make a blank;
step three, extrusion pushing: feeding the pre-pressed blank into a material cavity of an extruder to prepare a polytetrafluoroethylene layer serving as an inner container;
step four, drying and cooling: cooling and forming the extruded tetrafluoride pipe;
weaving in the fifth step: pressing a glowing stainless steel wire mesh grid formed by weaving on a tetrafluoride tube, wherein the depth of the glowing stainless steel wire mesh grid is one third of the thickness of the stainless steel wire mesh grid, and the glowing stainless steel wire mesh grid is adhered to one side of the tetrafluoride tube in a molten state, and the temperature of the stainless steel wire mesh grid is 450 ℃;
step six, cooling and forming;
and seventhly, deoiling, drying and shaping.
As clearly analyzed by the data given in fig. 1 to 3 about the related tests of the tetrafluoride pipe, the strength of the tetrafluoride pipe is affected by the number of layers of the stainless steel wire braided layer and the braiding angle, the compressive strength is better when the braiding angle is 52 to 60 degrees, the greater the number of layers of the stainless steel wire braided layer, the stronger the strength is, but the bending degree is limited, and 1 to 3 layers are relatively suitable, and the requirements of the bending degree and the strength can be specifically chosen according to the actual situation.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A high-pressure-resistance tetrafluoride pipe is characterized in that: n layers of stainless steel wires are woven outside the tetrafluoride pipe to form a stainless steel wire woven net, wherein n is more than or equal to 1 and n is less than or equal to 3; one third of the volume of the stainless steel wire woven net at the innermost layer is embedded on the wall of the polytetrafluoroethylene tube, the weaving angle of the stainless steel wire at the innermost layer is theta, wherein the theta is more than 60 degrees and is more than 52 degrees, and the adjacent stainless steel wire woven nets are fixedly connected.
2. The high pressure resistance tetrafluoride pipe according to claim 1, wherein: 1 layer of stainless steel wire is woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 60 degrees.
3. The high pressure resistance tetrafluoride pipe according to claim 1, wherein: 2 layers of stainless steel wires are woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 55 degrees.
4. The high pressure resistance tetrafluoride pipe according to claim 1, wherein: 3 layers of stainless steel wires are woven outside the tetrafluoride pipe; one third of the volume of the stainless steel wire at the innermost layer is embedded on the wall of the tetrafluoro tube, and the weaving angle of the stainless steel wire at the innermost layer is 52 degrees.
5. The method for preparing a high pressure resistance tetrafluoride tube according to claim 1, comprising the steps of:
step one, constant temperature treatment of raw materials: grinding and mixing 95 parts of polytetrafluoroethylene dispersion resin and 5 parts of extrusion auxiliary agent at normal temperature, and curing at constant temperature of 35-45 ℃ for 48 hours;
step two, embryo pressing: guiding the cured polytetrafluoroethylene dispersion resin and the extrusion auxiliary agent into a material cavity of a blank making machine to make a blank;
step three, extrusion pushing: feeding the pre-pressed blank into a material cavity of an extruder to prepare a polytetrafluoroethylene layer serving as an inner container;
step four, drying and cooling: cooling and forming the extruded tetrafluoride pipe;
weaving in the fifth step: pressing a glowing stainless steel wire mesh grid formed by weaving on the tetrafluoride tube, wherein the depth of the glowing stainless steel wire mesh grid is one third of the thickness of the stainless steel wire mesh grid, and the temperature of the stainless steel wire mesh grid is 400-450 ℃;
step six, cooling and forming;
and seventhly, deoiling, drying and shaping.
6. The high pressure resistance tetrafluoride pipe according to claim 5, wherein: and fifthly, weaving, wherein during operation, a molten tetrafluoride pipe is attached to one side of the tetrafluoride pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911362318.3A CN111255957A (en) | 2019-12-26 | 2019-12-26 | High-pressure-resistance tetrafluoride pipe and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911362318.3A CN111255957A (en) | 2019-12-26 | 2019-12-26 | High-pressure-resistance tetrafluoride pipe and preparation method thereof |
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| CN111255957A true CN111255957A (en) | 2020-06-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103697A (en) * | 1986-04-18 | 1987-12-23 | 塔卡尔密·弗莱克希伯尔股份有限公司 | A kind of novel high pressure hose and production method thereof |
| WO2011126840A1 (en) * | 2010-03-30 | 2011-10-13 | Martucci Norman S | Hose for fluids pulsating at high pressure and frequency and method of construction |
| CN104797409A (en) * | 2012-11-16 | 2015-07-22 | 康斯博格驱动系统第二公司 | Method of forming a hose assembly |
| US20150330538A1 (en) * | 2014-05-16 | 2015-11-19 | Eaton Corporation | Aerospace hose having epdm rubber layer |
| CN105965923A (en) * | 2016-06-06 | 2016-09-28 | 苏州捷宁模塑有限公司 | Processing process for polytetrafluoroethylene steel wire composite pipe |
-
2019
- 2019-12-26 CN CN201911362318.3A patent/CN111255957A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103697A (en) * | 1986-04-18 | 1987-12-23 | 塔卡尔密·弗莱克希伯尔股份有限公司 | A kind of novel high pressure hose and production method thereof |
| WO2011126840A1 (en) * | 2010-03-30 | 2011-10-13 | Martucci Norman S | Hose for fluids pulsating at high pressure and frequency and method of construction |
| CN104797409A (en) * | 2012-11-16 | 2015-07-22 | 康斯博格驱动系统第二公司 | Method of forming a hose assembly |
| US20150330538A1 (en) * | 2014-05-16 | 2015-11-19 | Eaton Corporation | Aerospace hose having epdm rubber layer |
| CN105965923A (en) * | 2016-06-06 | 2016-09-28 | 苏州捷宁模塑有限公司 | Processing process for polytetrafluoroethylene steel wire composite pipe |
Non-Patent Citations (1)
| Title |
|---|
| 《化工百科全书》编辑委员会: "《化工百科全书 第17卷 无机聚合物-心血管疾病药物》", 30 April 1998, 化学工业出版社 * |
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