KR20150045758A - Ultra-high molecular weight polyethylene lined pipe connector and maunfacturing method thereof - Google Patents
Ultra-high molecular weight polyethylene lined pipe connector and maunfacturing method thereof Download PDFInfo
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- KR20150045758A KR20150045758A KR20130125415A KR20130125415A KR20150045758A KR 20150045758 A KR20150045758 A KR 20150045758A KR 20130125415 A KR20130125415 A KR 20130125415A KR 20130125415 A KR20130125415 A KR 20130125415A KR 20150045758 A KR20150045758 A KR 20150045758A
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- joint pipe
- pipe
- molecular weight
- joint
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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
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/26—Lining or sheathing of internal surfaces
-
- 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
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
- F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention relates to an ultra-high density polyethylene lined pipe and a manufacturing method thereof,
And a double-ended pipe is constructed by coupling an ultra-high molecular weight polyethylene liner (L) to the inside of a cabon steel pipe connector (1) having flanges (2) It is an ultra-high density polyethylene lined joint pipe which features.
In the present invention as described above, the ultra-high density polyethylene liner is inserted and bonded into the inside of the joint pipe made of a metal material, so that it is excellent in chemical resistance as well as excellent in abrasion resistance and excellent in impact resistance and coefficient of friction close to zero It is suitable to be used as a joint pipe for transferring sludge from a desulfurization (desulfurization) facility of a power plant.
Also, it can be used regardless of the high concentration, high temperature and low temperature of chemical agent in the performance of the product, so it has excellent reliability as piping connection material, and it is easy to connect piping and compatibility is good.
Description
The present invention relates to an ultra-high molecular weight polyethylene lined pipe connector and a method of manufacturing the same. More particularly, the present invention relates to a lined pipe connector, (UHMWPE liner) is combined with a high-density polyethylene liner (UHMWPE liner) to form a joint pipe, thereby exhibiting excellent chemical resistance and abrasion resistance superior to stainless steel and having the highest impact resistance and coefficient of friction Ultra-high molecular weight polyethylene lined pipe connector, which is free from foreign matter and has no harmful effect on contact with food due to its non-toxic and semi-permanent lifetime. And a manufacturing method thereof.
In the present invention, the term "joint pipe" refers to a pipe connected to a pipe for transporting fluids such as sewage, sludge in a desulfurization facility of a sewage, hot water, gas, acid, alkali, It refers to a connector that converts the direction of fluid.
Conventionally, it is a joint pipe which is connected to pipes for transporting fluids such as basic compounds to change the direction of fluid. Polyethylene coating (coating thickness 0.8 to 1.2 mm) is applied to the inside of PVC or metal pipe. However, such a conventional joint pipe was not used in a short time, and corrosion occurred.
In addition, the conventional joint pipe has a weak resistance against corrosion, so that it is not excellent in chemical resistance, weak in physical impact, short in life span, weak in freeze wave, and low in thermal insulation.
Particularly, in case of transferring sludge from a desulfurization (desulfurization) plant of a power plant, since the sludge is mainly composed of sulfur oxides, abrasion of the joint pipe is extremely severe, will be.
In order to solve the above problems, according to the present invention, an ultra-high molecular weight polyethylene liner is combined with a cabon steel pipe connector to form a joint pipe, thereby exhibiting excellent chemical resistance, Ultra-high molecular weight polyethylene, which is superior to stainless steel and has the highest impact resistance and coefficient of friction close to 0, does not adhere to foreign materials, has no harm to food due to cold and non-toxic effects, A lined pipe connector and a method of manufacturing the same.
As a first embodiment of the present invention, an ultra-high molecular weight polyethylene liner is coupled to a cabon steel pipe having flanges at both ends thereof, will be.
As a second embodiment for achieving the object of the present invention, there is provided a second process for manufacturing a joint pipe made of a metal material, which is manufactured to have dimensions and dimensions to be used, and then subjected to electric arc welding so that flanges are perpendicular to both ends of the joint pipe, and,
A metal mold is inserted into the joint pipe made of the metal material, and a separate flange mold separated from the integrally formed flange having the injection port integrally formed with the inserted mold is fastened to both flanges of the joint pipe by bolts and nuts at both ends of the joint pipe. A second step of securing a space portion by fixing,
After preheating the outer surface of the metal joint pipe at a temperature of 130 ° C to 150 ° C for about 3 to 5 minutes, a resin solution of ultra-high molecular weight polyethylene is inserted into the space through an injection port, The process,
In the third step, the joint pipe and the mold in which the ultra-high molecular weight polyethylene resin liquid is completely injected into the space portion are cooled in the cooling water bath with cooling water at 15 ° C to 18 ° C for 10 to 15 minutes, And a fourth step of releasing the nut and separating the separable flange mold.
According to the present invention,
First, by incorporating an ultra-high molecular weight polyethylene liner into the inside of a joint pipe made of a metal material, it is excellent in chemical resistance as well as abrasion resistance, and has excellent impact resistance and a coefficient of friction close to zero. And is particularly suitable for use as a joint pipe for transferring sludge from a desulfurization facility of a power plant.
Secondly, there is no harm to food contact with cold and non-toxic, semi-permanent lifespan, economical effect, and remarkable resistance to corrosion, suitable for any kind of acid, alkali and basic compounds, The ultra-high molecular weight polyethylene liner is suitable for use in steelmaking plants, chemical plants and nuclear power plant facilities that are susceptible to high temperatures. Ultra-high molecular weight polyethylene liner (Ultra-high molecular weight polyethylene liner) weight polyethylene liner) is semi-permanent and does not cause clicks or breakage even during sudden shocks.
Third, in transporting fluid material, which is sludge in a desulfurization (黄 黄) plant, which is mainly composed of sulfur oxides, since the inner surface is smooth, friction resistance is low and adherents are not formed, The flow rate is very large by keeping it as it is.
Fourth, the combination of a metal tube and an ultra-high molecular weight polyethylene liner allows the thermal expansion property to be the same as that of a metal tube and can be protected from frost.
Ultra-high molecular weight polyethylene liner has very low thermal conductivity and excellent insulation effect, conserving energy of transport fluid.
Fifth, by joining a metal joint pipe and an ultra-high molecular weight polyethylene liner, there is no gap or widening between the inner diameter of the joint pipe and the outer diameter of the UHMWPE liner, Excellent performance and reliability, easy installation, high safety and semi-permanent durability provide users with high economic benefits.
1 is an overall sectional view of an "ultra-high density polyethylene lined joint tube" in the " ultra high density polyethylene lined joint tube and its manufacturing method "according to the present invention.
Fig. 2 is a cross-sectional view showing first and second steps for manufacturing an " ultra-high density polyethylene lined joint tube " according to the present invention, in which a space is formed by inserting a metal mold into a joint pipe.
Fig. 3 is a cross-sectional view showing a third step for producing an " ultra-high density polyethylene lined joint tube " according to the present invention, wherein an ultra-high density polyethylene resin liquid is inserted into a space portion.
4 to 7 are cross-sectional views showing various types of completed " ultra-high density polyethylene lined joints " according to the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
First, a specific embodiment of the present invention will be described with reference to FIG. 1 to FIG.
The terms defined in describing the present invention are defined in consideration of functions and forms in the present invention, and should not be construed as limiting the technical elements of the present invention.
While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .
In the first embodiment of the present invention, an ultra-high density polyethylene liner (Ultra-high-density polyethylene liner) 1 is inserted into a cabon steel pipe connector 1 having
The "ultra-high molecular weight polyethylene lined pipe" according to the present invention as described above is used in a cabon steel pipe connector 1 in which an ultra-high molecular weight polyethylene liner ) L (L) as well as excellent chemical resistance and abrasion resistance, the highest impact resistance and coefficient of friction are close to 0, no foreign matter adhered, cold and non-toxic, no harm to food contact, semi-permanent lifetime, economical effect Can be obtained.
It is suitable for high concentration, high temperature and low temperature of acid, alkali, basic, aromatic, halogen etc. of any type as well as corrosion, and it can be used regardless of high concentration, high temperature and low temperature of chemicals. It is easy to install piping and has excellent compatibility.
Particularly, the ultra-high molecular weight polyethylene lined pipe of the present invention is used as a joint pipe for transferring sludge in a desulfurization (desulfurization) facility of a power plant, It can be used as a semi-permanent life without any foreign matter.
The physical properties of the above-mentioned "Ultra-high molecular weight polyethylene lined pipe" of the present invention are shown in Table 1 below.
1,820 MPa (18.6 kgf / cm2)
℃
℃
89
54
The ultra-high molecular weight polyethylene liner (L), which is coupled to the inside of the cabon steel pipe connector 1 of the present invention as described above, is used for continuous use at temperatures of -100 ° C. to 80 ° C. And is composed of a joint pipe (Cabon Steel Pipe 1) and an ultra-high molecular weight polyethylene liner (L) combined to form a joint pipe, thereby having a Rockwell hardness (R-Scale) of 52, Is very high.
The tensile strength [Mpa (kgf / cm2)] was 31 (320), the flexural strength [Mpa (kgf / cm2)] was 20 (200), and the flexural modulus [Mpa ) Is 883 (9), the compressive strength is 20Mpa (4.6kgf / ㎠) at the yield point of 5% strain, 200Mpa (4.6kgf / ㎠) at the 10% strain, the elongation is 500% Is 89 ° C at 0.445 MPa (4.6 kgf / cm 2) and 54 ° C. at 1,820 MPa (18.6 kgf / cm 2), and has a linear expansion coefficient (X / ° C) of 20 and a dielectric constant permittivity, heat deflection temperature, flexural strength, and yield strength, and is excellent in electrical insulation, ultraviolet rays, and physical impact.
Next, as a second embodiment of the present invention, a "method of manufacturing an ultra-high density polyethylene lined joint tube" will be described with reference to FIGS. 2 to 3 attached hereto.
First, in the first step, as shown in FIG. 2, a joint pipe 1 made of a metallic material is manufactured to have dimensions and dimensions to use a 90 ° elbow, and flanges 2 (2a) are orthogonal to each other by electric arc welding.
Thereafter, as a second step, the metal mold 3 is inserted into the joint pipe 1 made of a metal material in the circumferential direction, and integrally formed with the inserted metal mold 3 at both ends of the joint pipe 1 4 and the
Thereafter, as a third step, preheating is applied to the outside of the joint pipe 1 made of a metallic material at a temperature of 130 ° C to 150 ° C for about 3 to 5 minutes, and then ultra-high molecular weight polyethylene The liquid is injected through the injection port 9 by operating an extruder (not shown).
The ultra-high molecular weight
The ultra-high molecular weight
If the heat is not applied, the injected ultra-high molecular weight
Thus, before the injection of the synthetic resin solution, the outside of the joint pipe 1 is preheated at 130 ° C to 150 ° C for about 3 to 5 minutes. When the heating temperature is 130 ° C or less and the heating time is 3 minutes, The mold can be smoothly conveyed evenly to the end portion of the
Therefore, the present inventors have found a range of the heating temperature of 130 ° C to 150 ° C and the heating time of 3 to 5 minutes as the most preferable condition for many trial and error ends.
Next, in the fourth step, when the ultra-high molecular weight polyethylene resin liquid is completely injected into the space part 8 as in the third step, the liquid is separated from the extruder (not shown) Not shown) is cooled with cooling water of 15 ° C to 18 ° C for about 10 to 15 minutes according to the specifications of the product.
Thereafter, the
(P) of the present invention in which the ultra-high molecular weight polyethylene liner (L) is formed inside the joint pipe (1) as shown in FIG. 1 through the above- Is completed.
On the other hand, an electric spark tester (so-called pinhole tester) of DC 15,000 V was tested for a genuine or defective product on the "ultra-high density polyethylene lined pipe" (P) manufactured by the above manufacturing method do.
If the negative pole (-) of the pinhole tester (-) is connected to the outside of the pipe joint and the positive pole (+) bar is connected to the ultra-high molecular weight polyethylene liner (L) An electric spark occurs and an alarm attached to the pinhole tester sounds. This inspection process is performed to check whether the product is genuine or defective.
Various types of " Ultra-high molecular weight polyethylene Lined Pipe Connector " (P) as shown in Figs. 1 and 4 to 7 can be produced by the above- .
The physical properties of the " Lined Pipe Connector " of the present invention manufactured as described above are as shown in Table 1 and the action and effect are as described above.
That is, since the ultra-high molecular weight polyethylene liner (L) is formed by joining in the inside of the joint pipe 1 made of a metal material, it is excellent in chemical resistance, abrasion resistance and excellent in impact resistance and coefficient of friction It is suitable to be used as a joint pipe for transferring sludge from a desulfurization (desulfurization) facility of a power plant.
It is also suitable for any kinds of acid, alkali and basic compounds due to its remarkable resistance to corrosion as well as its economical effect due to its semi-permanent lifespan, corrosion and physical impact suddenly occur Ultra-high molecular weight polyethylene liner (L) is suitable for use in steel mills, chemical plants, and nuclear power plant facilities. It has an ultra-high density polyethylene liner molecular weight polyethylene liner) is semi-permanent and does not click or break even during sudden impact.
It transports fluid material which is sludge in desulfurization (黄 黄) plant which is mainly composed of sulfur oxides. Because it has smooth inner surface, friction resistance is low and deposit is not generated, The flow rate is very large.
The joint pipe (1) and the ultra-high molecular weight polyethylene liner (L) are combined and the thermal expansion characteristics are the same as those of the metal tube and can be protected from frost.
That is, since the joint pipe 1 made of a metal material protects the outside, it is very strong against freezing.
The ultra-high molecular weight polyethylene liner (L) has a very low thermal conductivity, so it has excellent adiabatic effect and preserves the energy of the transport fluid.
By combining the joint pipe (1) with the ultra-high molecular weight polyethylene liner (L), the inner diameter of the metal joint pipe and the outer diameter of the UHMWPE liner have a close contact force, It has excellent performance and reliability of the product, easy construction, high safety, semi-permanent durability, and provides users with high economic benefits.
1:
3: mold 4: integral flange
5:
7,7a: nut 8:
9: Injection port
10: Ultra-high molecular weight polyethylene resin liquid
L: Ultra-high molecular weight polyethylene liner
P: Ultra-high molecular weight polyethylene lined pipe
Claims (4)
A metal mold 3 is inserted into a joint pipe 1 made of a metal material and a separable flange metal mold 5 separated from an integral flange 4 integral with the inserted metal mold 3 is provided at both ends of the joint pipe 1 And are fastened and fixed to both flanges 2 and 2a of the joint pipe 1 by means of bolts 6 and 6a and nuts 7 and 7a so that the joint pipe 1 and the mold 3, A second step of forming the space portion 8 at a predetermined interval between the both end flanges 2 and 2a of the joint pipe 1 and the integral flange 4 and the separate flange metal mold 5,
After preheating the outer surface of the joint pipe 1 at 130 ° C to 150 ° C for about 3 to 5 minutes, an ultra-high molecular weight polyethylene resin solution is inserted through the injection port 9, A third step of filling the space portion 8 with voids so as to fill the ultra-high molecular weight polyethylene resin liquid 10 inserted through the through holes 9,
Ultra-high molecular weight polyethylene resin liquid is completely injected into the space part 8 as in the third step and then cooled in cooling water bath with cooling water at 15 ° C to 18 ° C for about 10 to 15 minutes The bolts 6 and 6a and the nuts 7 and 7a are released and the separable flange metal mold 5 is separated and the metal mold 3 is separated from the joint pipe 1 by using a hydraulic cylinder to form an ultra- A fourth step of manufacturing a joint pipe,
The ultra high density polyethylene lined joint pipe manufactured by the fourth step is inspected for a genuine or defective product by an electric spark tester (so-called pin hole tester) of DC 15,000 V,
When the pinhole tester cathode (-) is placed outside the joint pipe and the positive (+) bar is placed on the ultra-high molecular weight polyethylene liner (L) , An electric spark is generated and an alarm attached to the pinhole tester is turned on to test whether the product is genuine or defective, thereby manufacturing an ultra-high density polyethylene lined pipe joint,
The ultra high density polyethylene lined joint pipe had a Rockwell hardness (R-Scale) of 52, a tensile strength of Mpa (kgf / cm2) of 31 (320) and a flexural strength of Mpa (kgf / ), Flexural modulus [Mpa (kgf / ㎠)] is 883 (9), compressive strength is 20Mpa (4.6kgf / ㎠) when the yield point is 5% strain, 200Mpa (X / ° C) of 20, and a specific gravity (G / cm 2) of 89% at a heat distortion temperature of 0.445 MPa (4.6 kgf / 0.94 and a continuous use temperature of -100 ° C to 80 ° C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130125415A KR102043302B1 (en) | 2013-10-21 | 2013-10-21 | Ultra-high molecular weight polyethylene lined pipe connector and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020130125415A KR102043302B1 (en) | 2013-10-21 | 2013-10-21 | Ultra-high molecular weight polyethylene lined pipe connector and manufacturing method thereof |
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| KR20150045758A true KR20150045758A (en) | 2015-04-29 |
| KR102043302B1 KR102043302B1 (en) | 2019-12-02 |
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| US11125373B2 (en) * | 2018-03-07 | 2021-09-21 | The Rendely Connection | Structural connection between in-line pipes and tubes |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201531687U (en) * | 2009-10-23 | 2010-07-21 | 沂源县联创工贸有限公司 | Ultra-high molecular weight polyethylene composite pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201531687U (en) * | 2009-10-23 | 2010-07-21 | 沂源县联创工贸有限公司 | Ultra-high molecular weight polyethylene composite pipe |
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