CN110778839B - Wear-resistant and corrosion-resistant PVC plastic pipe set and preparation method thereof - Google Patents
Wear-resistant and corrosion-resistant PVC plastic pipe set and preparation method thereof Download PDFInfo
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- CN110778839B CN110778839B CN201911061455.3A CN201911061455A CN110778839B CN 110778839 B CN110778839 B CN 110778839B CN 201911061455 A CN201911061455 A CN 201911061455A CN 110778839 B CN110778839 B CN 110778839B
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- plastic pipe
- joint
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- 239000004033 plastic Substances 0.000 title claims abstract description 87
- 229920003023 plastic Polymers 0.000 title claims abstract description 87
- 238000005260 corrosion Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims description 13
- 230000007797 corrosion Effects 0.000 title description 6
- 230000000670 limiting effect Effects 0.000 claims abstract description 91
- 230000002829 reductive effect Effects 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims description 27
- 230000003078 antioxidant effect Effects 0.000 claims description 24
- 239000003963 antioxidant agent Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 19
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 16
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- HYWCXWRMUZYRPH-UHFFFAOYSA-N trimethyl(prop-2-enyl)silane Chemical compound C[Si](C)(C)CC=C HYWCXWRMUZYRPH-UHFFFAOYSA-N 0.000 claims description 11
- ULIKDJVNUXNQHS-UHFFFAOYSA-N 2-Propene-1-thiol Chemical compound SCC=C ULIKDJVNUXNQHS-UHFFFAOYSA-N 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- SMQUZDBALVYZAC-UHFFFAOYSA-N salicylaldehyde Chemical compound OC1=CC=CC=C1C=O SMQUZDBALVYZAC-UHFFFAOYSA-N 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 4
- 238000004821 distillation Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 230000002441 reversible effect Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 20
- 150000003254 radicals Chemical class 0.000 description 11
- 230000032683 aging Effects 0.000 description 10
- 230000036961 partial effect Effects 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000010526 radical polymerization reaction Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000007348 radical reaction Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 2
- 150000001348 alkyl chlorides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- BOXSVZNGTQTENJ-UHFFFAOYSA-L zinc dibutyldithiocarbamate Chemical compound [Zn+2].CCCCN(C([S-])=S)CCCC.CCCCN(C([S-])=S)CCCC BOXSVZNGTQTENJ-UHFFFAOYSA-L 0.000 description 1
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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
- F16L43/00—Bends; Siphons
- F16L43/02—Bends; Siphons adapted to make use of special securing means
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/16—Screw-threaded joints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2427/06—Homopolymers or copolymers of vinyl chloride
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a wear-resistant anti-corrosion PVC plastic pipe kit, which comprises pipe fittings and plastic pipe fittings fixedly connected through the pipe fittings, wherein a limiting fixing table is arranged on the outer surface of the side wall of each pipe fitting joint close to the joint of the pipe fitting and the plastic pipe fitting, a limiting hole extending to the inner cavity of the pipe fitting is formed in the inner surface of the side wall of the joint end part of the pipe fitting joint, the limiting fixing table is positioned right above the limiting hole, and meanwhile, a limiting groove corresponding to the limiting hole is formed in the outer surface of the side wall of the plastic pipe fitting. According to the invention, the limiting fixing table is arranged on the pipe fitting joint, the elastic limiting seat is arranged on the limiting fixing table, and the limiting rod in the elastic limiting seat directly penetrates through the pipe fitting joint to be inserted into the groove on the surface of the plastic pipe fitting, so that the plastic pipe fitting can be effectively prevented from moving, further, the plastic pipe fitting can not be easily separated from the connecting head due to the reverse force carelessly applied in the vibration moving process and other processes in the long-term use process of the pipe fitting, frequent maintenance is not needed, and the labor intensity is reduced.
Description
Technical Field
The invention belongs to the field of preparation of plastic pipe kits, and relates to a wear-resistant anti-corrosion PVC plastic pipe kit and a preparation method thereof.
Background
The plastic tubing external member generally includes connector and plastic pipe spare, it is fixed through threaded connection usually to be in order to facilitate the dismantlement between connector and the plastic pipe spare, but because threaded connection is fixed, in the long-time use, apply the counter force or the counter force that the in-process carelessly was applyed such as vibration removal all causes plastic pipe spare to deviate from the connector easily, and then causes the plastic tubing external member junction material to omit, need often overhaul to screw up, it is inconvenient to use, and intensity of labour has been improved.
Because PVC has higher corrosion resistance, PVC is generally widely applied to oil transportation tanks and acid-base conveying pipes, but the heat resistance and the aging resistance of PVC are lower, and pipes can be aged, embrittled and cracked after being exposed to the sun for a long time.
Disclosure of Invention
The invention aims to provide a wear-resistant anti-corrosion PVC plastic pipe set and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a wear-resisting anticorrosion PVC plastic tubing external member, includes that the pipe fitting connects and connects fixed plastics pipe fitting through the pipe fitting, the lateral wall surface that every pipe fitting connects all is provided with spacing fixed station near the junction with the plastics pipe fitting, and the joint end lateral wall internal surface that the pipe fitting connects is opened there is the spacing hole that extends to the pipe fitting inner chamber, and spacing fixed station is located directly over the spacing hole, and the spacing groove corresponding with spacing hole is opened to plastics pipe fitting lateral wall surface simultaneously.
An elastic limiting seat is installed in the limiting fixing table, and the pipe fitting joint and the plastic pipe fitting are limited and fixed through the elastic limiting seat.
The limiting and fixing platform comprises two supporting rods which are integrally connected and fixed on the side walls of the pipe fitting joint, the side walls of the end parts of the two supporting rods are vertically connected and fixed through a clamping and fixing strip, a placing cavity is formed in the center of the middle of the clamping and fixing strip, limiting mounting grooves are formed in the side walls of the two ends of the placing cavity, a sliding strip hole communicated with the placing cavity is formed in the middle of the bottom surface of the clamping and fixing strip, and penetrating holes extending to the front side wall and the rear side wall of the clamping and fixing strip are formed in the center of the bottom surface of the clamping and fixing strip;
the elastic limiting seat comprises a pressure spring installed in a limiting installation groove and pressing blocks installed at two ends of the placing cavity, the side wall of one end of each pressing block is connected with the end face of the pressure spring, the end face of each pressing block is hinged with a push rod, one end of each push rod is hinged to the top end of a limiting rod, and the limiting rods are matched with limiting holes and limiting grooves.
Further, the pipe fitting joint and the plastic pipe fitting are fixedly connected through threads.
Furthermore, the middle part of the top end surface of the clamping strip is provided with a piece placing opening communicated with the placing cavity, and the width of the piece placing opening is the same as that of the placing cavity.
Furthermore, mounting bar holes are formed in the middle of the front side wall and the rear side wall of each clamping bar, the width of each mounting bar hole is 1-1.5cm smaller than the depth of the corresponding placing cavity, the penetrating holes are communicated with the mounting bar holes, and the penetrating holes are located on the square of the limiting holes.
Further, the lateral wall all meets with the upper and lower left and right sides lateral wall internal surface of placing the cavity about the bottom surface of pressure movable block to the length of pressure movable block is for putting a half of a mouthful length, and the terminal surface of pressure movable block is opened there is the first mounting groove that extends to the lower face, and the both sides wall of first mounting groove is opened there is first mounting hole, and interference fit installs first articulated shaft in the first mounting hole, all articulates on the first articulated shaft and is fixed with the push rod.
Furthermore, a clamping block is integrally connected and fixed on the end face of the limiting rod, the length of the clamping block is smaller than that of the penetrating hole by 1.5-2cm, a second mounting groove extending to two sides is formed in the end face of the clamping block, two second mounting holes are formed in the side wall of each second mounting groove, a second hinge shaft is mounted in each second mounting hole in an interference fit mode, and one end of each push rod is hinged to the corresponding second hinge shaft.
A wear-resistant anti-corrosion PVC plastic pipe kit, wherein the pipe fitting joint and the plastic pipe fitting are both prepared from high-temperature-resistant anti-corrosion plastic master batches, wherein the high-temperature-resistant anti-corrosion plastic master batches comprise the following components in parts by weight:
85-90 parts of PVC resin, 1-1.5 parts of allyl mercaptan, 4-5 parts of unsaturated antioxidant, 2-3 parts of allyl trimethylsilane, 2-3 parts of dispersant and 5-6 parts of azobisisobutyronitrile;
the unsaturated antioxidant is prepared by the following specific steps: adding salicylaldehyde into ether, stirring for dissolving, adding acrylamide, heating to 60-70 ℃, stirring for reacting for 8-10h, and then carrying out reduced pressure distillation to obtain an unsaturated antioxidant; wherein the ratio of the salicylaldehyde to the acrylamide is 1: 1, mixing and preparing; hydrogen in phenolic hydroxyl in the unsaturated antioxidant can be dropped off to react with free radicals so as to make the free radicals lose activity, thereby inhibiting the free radical reaction and realizing the oxidation resistance;
the specific preparation process of the high-temperature-resistant anticorrosive plastic master batch comprises the following steps:
firstly, adding PVC resin and allyl mercaptan into a screw extruder at the same time, and carrying out melt extrusion to obtain a modified PVC material; alkyl chloride in PVC can perform substitution reaction with thiol groups in allyl mercaptan, so that the allyl mercaptan is introduced into a PVC resin chain, unsaturated bonds are introduced into the PVC resin chain, and the prepared modified PVC material contains the unsaturated bonds;
step two, adding the modified PVC material prepared in the step one, the unsaturated antioxidant, the allyltrimethylsilane, the azobisisobutyronitrile and the dispersant into a reaction vessel at the same time, heating to 140-; the modified PVC material allyl trimethylsilane can be subjected to free radical polymerization reaction under the initiation of azobisisobutyronitrile at high temperature, and the PVC material has high corrosion resistance, so that the corrosion resistance of the PVC material is improved after polymerization, and the antioxidant property of the polymer can be realized by introducing an unsaturated antioxidant into the PVC material, so that the prepared polymer has high ultraviolet aging resistance, and the introduced allyl trimethylsilane contains a large amount of siloxane bonds, so that the high temperature resistance of the polymer is improved.
The invention has the beneficial effects that:
1. according to the invention, the limiting fixing table is arranged on the pipe fitting joint, the elastic limiting seat is arranged on the limiting fixing table, and the limiting rod in the elastic limiting seat directly penetrates through the pipe fitting joint to be inserted into the groove on the surface of the plastic pipe fitting, so that the plastic pipe fitting can be effectively prevented from moving, further, the plastic pipe fitting can not be easily separated from the connecting head due to the reverse force carelessly applied in the vibration moving process and other processes in the long-term use process of the pipe fitting, frequent maintenance is not needed, and the labor intensity is reduced.
2. The elastic limiting seat can realize limiting through elastic expansion of the spring under the condition of no disassembly, so that the pipe fitting joint and the plastic pipe fitting are convenient to disassemble and install.
3. The pipe fitting prepared by the invention is prepared by free radical polymerization of modified PVC, and because the PVC is modified by reaction with allyl mercaptan, a large amount of unsaturated bonds are contained on a PVC resin chain and can be subjected to free radical polymerization with unsaturated antioxidant and allyl trimethylsilane, a large amount of unsaturated antioxidant is grafted on the PVC chain, hydrogen in phenolic hydroxyl in the unsaturated antioxidant can fall off to react with free radicals, so that the free radicals lose activity, the free radical reaction is inhibited, the antioxidant performance is realized, the prepared pipe fitting has higher antioxidant performance, and because the content of the unsaturated bonds on the PVC chain is increased, the number of free radical binding sites is increased, the local degree is increased, the prepared material polymer is higher, the strength is higher, and the problems of lower heat resistance and aging resistance of the PVC are effectively solved, the pipe fittings can be aged, embrittled and cracked when being exposed to the sun for a long time outdoors.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the plastic tube set of the present invention after installation;
FIG. 2 is an exploded view of the structure of FIG. 1;
FIG. 3 is a partial schematic view of the plastic tube set after installation;
FIG. 4 is a partial schematic structural view of a plastic tube set during disassembly;
FIG. 5 is an exploded view of the partial structure of FIG. 3;
FIG. 6 is a schematic view of a partial structure of a position-limiting fixing table;
FIG. 7 is a schematic view of a partial structure of a position-limiting fixing table;
fig. 8 is a schematic view of the elastic force limiting seat.
Detailed Description
Example 1:
a wear-resistant and corrosion-resistant PVC plastic pipe set is shown in figures 1, 2, 3, 4 and 5 and comprises a pipe fitting joint 1 and a plastic pipe fitting 2 which is fixedly connected through the pipe fitting joint 1;
the pipe fitting joint 1 and the plastic pipe fitting 2 are fixedly connected through threads;
a limiting fixing table 3 is arranged on the outer surface of the side wall of each pipe fitting joint 1 close to the joint of the plastic pipe fitting 2, an elastic limiting seat 4 is installed in the limiting fixing table 3, and the pipe fitting joint 1 and the plastic pipe fitting 2 are limited and fixed through the elastic limiting seat 4;
the inner surface of the side wall of the joint end part of the pipe joint 1 is provided with internal threads, the inner surface of the side wall of the joint end part is provided with a limiting hole 11 extending to the inner cavity of the pipe, and the limiting fixing table 3 is positioned right above the limiting hole 11; meanwhile, the outer surface of the side wall of one end of the plastic pipe fitting 2 is provided with an external thread which is in threaded fit with the internal thread on the inner surface of the side wall of the pipe fitting joint 1, and the outer surface of the side wall of the plastic pipe fitting 2 is provided with a limit groove 21 corresponding to the limit hole 11;
as shown in fig. 6 and 7, the limiting and fixing table 3 comprises two supporting rods 31 integrally connected and fixed on the side walls of the pipe fitting joint 1, the end side walls of the two supporting rods 31 are vertically connected and fixed through a clamping and fixing strip 32, a placing cavity 33 is formed in the center of the middle of the clamping and fixing strip 32, a placing opening 38 communicated with the placing cavity 33 is formed in the middle of the top end face of the clamping and fixing strip 32, the width of the placing opening 38 is the same as that of the placing cavity 33, limiting mounting grooves 34 are formed in the side walls at the two ends of the placing cavity 33, mounting strip holes 35 are formed in the middle of the front and rear side walls of the clamping and fixing strip 32, the width of the mounting strip hole 35 is smaller than the depth of the placing cavity 33 by 1-1.5cm, a sliding strip hole 36 communicated with the placing cavity 33 is formed in the middle of the bottom face of the clamping and fixing strip 32, and a penetrating hole 37 extending to the front and rear side walls of the clamping and fixing strip 32 is formed in the center of the bottom face of the clamping and fixing strip 32, the penetrating hole 37 communicates with the mounting bar hole 35, and the penetrating hole 37 is located on the square of the stopper hole 11;
as shown in fig. 8, the elastic force-limiting seat 4 comprises a compression spring 41 installed in a limiting installation groove 34 and a pressing block 42 installed at both ends of the placing cavity 33, one end side wall of the pressing block 42 is connected with the end surface of the compression spring 41, the upper, lower, left, right side walls of the bottom surface of the pressing block 42 are connected with the inner surfaces of the upper, lower, left, right side walls of the placing cavity 33, the length of the pressing block 42 is half of the length of the piece placing opening 38, the end surface of the pressing block 42 is provided with a first installation groove 421 extending to the upper and lower surfaces, the two side walls of the first installation groove 421 are provided with first installation holes, first hinge shafts 422 are installed in the first installation holes in an interference fit manner, push rods 43 are hinged and fixed on the first hinge shafts 422, one end of the two push rods 43 is hinged on the top end of the limiting rod 44, the pushing rod 43 is located in the sliding strip hole 36, the limiting rod 44 is matched with the limiting hole 11 and the limiting groove 21, wherein the end surface of the limiting rod 44 is integrally connected and fixed with a clamping block 441, the length of the clamping block 441 is 1.5-2cm smaller than that of the penetrating hole 37; the end surface of the clamping block 441 is provided with second mounting grooves 442 extending to two sides, the side wall of the second mounting groove 442 is provided with two second mounting holes, a second hinge shaft 443 is mounted in each of the two second mounting holes through interference fit, and one end of each of the two push rods 43 is hinged on the second hinge shaft 443;
the specific installation process of the elastic limiting seat 4 is as follows: firstly, installing two compression springs 41 in a limiting installation groove 34, then placing two pressing blocks 42 at two sides of a placing cavity 33 to be tightly pressed and connected with the compression springs 41, then taking two push rods 43, hinging one ends of the two push rods 43 on a second hinging shaft 443, then enabling a hinged limiting rod 44 to pass through a part placing opening 38 and a penetrating hole 37, then placing the limiting rod 44 into a limiting hole 11, pulling the limiting rod 44 downwards until the top ends of the push rods 43 are clamped in a first installation groove 421 of the end face of the pressing blocks 42, enabling a through hole in the side wall of the push rod 43 to correspond to a first installation hole in the first installation groove 421 of the pressing block 42, then enabling a first hinging shaft 422 to pass through an installation strip hole 35, and then enabling the first installation shaft to pass through the first installation hole and a through hole in the side wall of the push rod 43 to be installed at the top end of the push rod 43 in an interference fit mode, so as to realize installation of an elastic installation seat 4;
the specific installation and use process of the PVC plastic pipe sleeve is as follows:
when the plastic tube set is installed: the limiting rod 44 is pushed upwards, the limiting rod 44 pushes one end of the push rod 43 to move upwards, because the other end of the push rod 43 is limited by the pressing block 42, when one end of the push rod 43 moves upwards, the other end pushes the pressing block 42 to move at two ends of the placing cavity 33, the pressing block 42 presses the pressing spring 41 to compress in the limiting installation groove 34 until the bottom end face of the limiting rod 44 enters the limiting hole 11 and does not extend out of the pipeline of the pipe fitting joint 1, then the plastic pipe fitting 2 is screwed in the pipe fitting joint 1 through threads, the limiting rod 44 is loosened after screwing, at the moment, the pressing block 42 moves towards the middle part under the elastic force of the pressing spring 41 to drive the top end of the push rod 43 to move towards the middle part, so that the bottom end of the push rod 43 moves downwards, the limiting rod 44 is pushed to move downwards until the bottom end face of the limiting rod 44 extends out of the limiting hole 11 and enters the limiting groove 21 on the side wall of the plastic pipe fitting 2, even if the plastic pipe fitting is moved for a long time, due to the limiting effect of the limiting rod 44, the plastic pipe fitting 21 can not rotate out of the pipe fitting joint 1, is in threaded connection and is fixed in the pipe fitting joint 1 in a limiting manner, and the plastic pipe fitting 2 is prevented from rotating in a direction due to reverse threaded rotation or vibration of the plastic pipe fitting after long-time use, so that the plastic pipe fitting 2 is separated from the pipe fitting joint 1;
when the plastic pipe sleeve is disassembled: the limiting rod 44 is pushed upwards, the limiting rod 44 pushes one end of the push rod 43 to move upwards, and since the other end of the push rod 43 is limited by the pressing block 42, when one end of the push rod 43 moves upwards, the other end pushes the pressing block 42 to move at two ends of the placing cavity 33, the pressing block 42 presses the pressing spring 41 to compress in the limiting installation groove 34 until the bottom end face of the limiting rod 44 enters the limiting hole 11, the bottom end face of the limiting rod 44 is separated from the limiting groove 21, and then the plastic pipe fitting 2 rotates reversely, so that the plastic pipe fitting 2 is separated from the pipe fitting joint 1.
Example 2:
the unsaturated antioxidant is prepared by the following specific steps: adding 12.2g of salicylaldehyde into 100mL of diethyl ether, stirring and dissolving, then adding 7.1g of acrylamide, heating to 60-70 ℃, stirring and reacting for 8-10h, and then carrying out reduced pressure distillation to obtain the unsaturated antioxidant.
Example 3:
the utility model provides a wear-resisting anticorrosive PVC plastic pipe external member, wherein pipe fitting joint and plastic pipe spare all are prepared by high temperature resistant anticorrosive plastic master batch, wherein the specific preparation process of high temperature resistant anticorrosive plastic master batch as follows:
step one, adding 8.5kg of PVC resin and 100g of allyl mercaptan into a screw extruder at the same time for melt extrusion to obtain a modified PVC material;
and step two, simultaneously adding the modified PVC material prepared in the step one, 0.4kg of the unsaturated antioxidant prepared in the embodiment 2, 0.2kg of allyl trimethylsilane, 0.5kg of azobisisobutyronitrile and 0.2kg of a dispersing agent into a reaction vessel, heating to 140 ℃ and 150 ℃, stirring and mixing for 2-3h, then cooling and discharging, and adding the materials into a single-screw extruder for melt extrusion granulation to obtain the high-temperature-resistant anticorrosive plastic master batch.
Example 4:
the utility model provides a wear-resisting anticorrosive PVC plastic pipe external member, wherein pipe fitting joint and plastic pipe spare all are prepared by high temperature resistant anticorrosive plastic master batch, wherein the specific preparation process of high temperature resistant anticorrosive plastic master batch as follows: adding 9kg of PVC resin, 0.4kg of the unsaturated antioxidant prepared in the embodiment 2, 0.2kg of allyl trimethylsilane, 0.5kg of azobisisobutyronitrile and 0.2kg of a dispersing agent into a reaction vessel at the same time, heating to 140 ℃ and 150 ℃, stirring and mixing for 2-3h, then cooling and discharging, adding the materials into a single-screw extruder, and carrying out melt extrusion granulation to obtain the high-temperature-resistant anticorrosive plastic master batch.
Example 5:
the utility model provides a wear-resisting anticorrosive PVC plastic pipe external member, wherein pipe fitting joint and plastic pipe spare all are prepared by high temperature resistant anticorrosive plastic master batch, wherein the specific preparation process of high temperature resistant anticorrosive plastic master batch as follows:
step one, adding 8.5kg of PVC resin and 100g of allyl mercaptan into a screw extruder at the same time for melt extrusion to obtain a modified PVC material;
and step two, simultaneously adding the modified PVC material prepared in the step one, 0.4kg of nickel dibutyldithiocarbamate, 0.2kg of allyltrimethylsilane, 0.5kg of azobisisobutyronitrile and 0.2kg of dispersing agent into a reaction vessel, heating to 140 ℃ and 150 ℃, stirring and mixing for 2-3h, then cooling and discharging, and adding the material into a single-screw extruder for melt extrusion granulation to obtain the high-temperature-resistant anticorrosive plastic master batch.
Example 6:
the plastic pipe prepared from the high-temperature-resistant anticorrosive plastic masterbatch prepared in examples 3 to 5 was placed in a xenon weather-resistant test chamber for ultraviolet aging treatment for 20 days, wherein the ultraviolet irradiation intensity was 45mW/cm2, the temperature was 60 ℃, the air humidity was 50%, and then the tensile strength of the plastic pipe before and after aging was measured, and the measurement structure is shown in table 1:
TABLE 1 tensile Strength (MPa) before and after aging of Plastic pipe fittings
| Example 3 | Example 4 | Example 5 | |
| Strength before aging MPa | 46.4 | 45.9 | 46.3 |
| Strength after aging MPa | 45.9 | 42.5 | 45.1 |
As can be seen from table 1, the pipe prepared in example 3 has high aging resistance, the strength does not change greatly after aging for 20 days, since PVC is modified by reaction with allyl mercaptan, a large number of unsaturated bonds are contained in the PVC resin chain, and can undergo a radical polymerization reaction with unsaturated antioxidant and allyl trimethylsilane, so that a large number of unsaturated antioxidant is grafted on the PVC chain, hydrogen in phenolic hydroxyl groups in the unsaturated antioxidant can be dropped off to react with radicals, so that the radicals lose activity, and further the radical reaction is inhibited, so that the oxidation resistance is achieved, and further the prepared pipe has high oxidation resistance, and since the content of unsaturated bonds in the PVC chain is increased, the radical binding sites are increased, so that the degree of local neutralization is improved, so that the prepared material polymer is high, the strength is high, and example 4 does not modify PVC directly, the free radical binding sites on the PVC chain are few, so that the content of the unsaturated antioxidant bound by the PVC chain is reduced, the oxidation resistance is reduced, the polymerization degree is reduced due to the reduction of the binding sites, and the mechanical strength is further reduced.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. A wear-resistant anti-corrosion PVC plastic pipe kit comprises pipe fittings (1) and plastic pipe fittings (2) fixedly connected through the pipe fittings (1), and is characterized in that a limiting fixing table (3) is arranged on the outer surface of the side wall of each pipe fitting joint (1) close to the joint of the plastic pipe fitting (2), a limiting hole (11) extending to the inner cavity of the pipe fitting is formed in the inner surface of the side wall of the joint end of the pipe fitting joint (1), the limiting fixing table (3) is positioned right above the limiting hole (11), and meanwhile, a limiting groove (21) corresponding to the limiting hole (11) is formed in the outer surface of the side wall of the plastic pipe fitting (2);
an elastic limiting seat (4) is arranged in the limiting and fixing table (3), and the pipe fitting joint (1) and the plastic pipe fitting (2) are limited and fixed through the elastic limiting seat (4);
the limiting fixing table (3) comprises two supporting rods (31) which are integrally connected and fixed on the side wall of the pipe fitting joint (1), the side walls of the end parts of the two supporting rods (31) are vertically connected and fixed through a clamping and fixing strip (32), a placing cavity (33) is formed in the center of the middle part of the clamping and fixing strip (32), limiting mounting grooves (34) are formed in the side walls of the two ends of the placing cavity (33), a sliding strip hole (36) communicated with the placing cavity (33) is formed in the middle of the bottom surface of the clamping and fixing strip (32), and a penetrating hole (37) extending to the front side wall and the rear side wall of the clamping and fixing strip (32) is formed in the center of the bottom surface of the clamping and fixing strip (32);
the elastic limiting seat (4) comprises a pressure spring (41) arranged in a limiting mounting groove (34) and pressing blocks (42) arranged at two ends of the placing cavity (33), the side wall of one end of each pressing block (42) is connected with the end face of the pressure spring (41), the end faces of the pressing blocks (42) are hinged with push rods (43), one ends of the two push rods (43) are hinged to the top end of a limiting rod (44), and the limiting rod (44) is matched with the limiting hole (11) and the limiting groove (21);
the pipe fitting joint (1) and the plastic pipe fitting (2) are fixedly connected through threads;
a workpiece placing opening (38) communicated with the placing cavity (33) is formed in the middle of the top end face of the clamping strip (32), and the width of the workpiece placing opening (38) is the same as that of the placing cavity (33);
mounting strip holes (35) are formed in the middle of the front side wall and the rear side wall of each clamping and fixing strip (32), the width of each mounting strip hole (35) is 1-1.5cm smaller than the depth of the placement cavity (33), the penetrating holes (37) are communicated with the mounting strip holes (35), and the penetrating holes (37) are located right above the limiting holes (11);
the upper side wall, the lower side wall, the left side wall and the right side wall of the bottom surface of the pressing block (42) are connected with the inner surfaces of the upper side wall, the lower side wall, the left side wall and the right side wall of the placing cavity (33), the length of the pressing block (42) is half of the length of the piece placing opening (38), a first mounting groove (421) extending to the upper surface and the lower surface is formed in the end surface of the pressing block (42), first mounting holes are formed in the two side walls of the first mounting groove (421), a first hinge shaft (422) is installed in the first mounting holes in an interference fit mode, and push rods (43) are fixedly hinged to the first hinge shaft (422);
the terminal surface body coupling of gag lever post (44) is fixed with joint piece (441), the length of joint piece (441) is less than the length 1.5-2cm that penetrates through hole (37), the terminal surface of joint piece (441) is opened has second mounting groove (442) that extends to both sides side, the lateral wall of second mounting groove (442) is opened has two second mounting holes, all install second articulated shaft (443) through interference fit in two second mounting holes, the one end of two push rods (43) articulates on second articulated shaft (443).
2. The preparation method of the wear-resistant anti-corrosion PVC plastic pipe external member according to claim 1, wherein the pipe fitting joint and the plastic pipe fitting of the PVC plastic pipe external member are both prepared from high-temperature-resistant anti-corrosion plastic master batches, and the high-temperature-resistant anti-corrosion plastic master batches comprise the following components in parts by weight: 85-90 parts of PVC resin, 1-1.5 parts of allyl mercaptan, 4-5 parts of unsaturated antioxidant, 2-3 parts of allyl trimethylsilane, 2-3 parts of dispersant and 5-6 parts of azobisisobutyronitrile.
3. The preparation method of the wear-resistant anti-corrosion PVC plastic pipe set according to claim 2, wherein the unsaturated antioxidant is prepared by the following steps: adding salicylaldehyde into ether, stirring for dissolving, then adding acrylamide, heating to 60-70 ℃, stirring for reacting for 8-10h, and then carrying out reduced pressure distillation to obtain the unsaturated antioxidant.
4. The preparation method of the wear-resistant anti-corrosion PVC plastic pipe kit according to claim 2, wherein the specific preparation process of the high-temperature-resistant anti-corrosion plastic master batch is as follows:
firstly, adding PVC resin and allyl mercaptan into a screw extruder at the same time, and carrying out melt extrusion to obtain a modified PVC material;
and step two, adding the modified PVC material prepared in the step one, the unsaturated antioxidant, the allyltrimethylsilane, the azobisisobutyronitrile and the dispersant into a reaction vessel, heating to 140-.
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Denomination of invention: A wear-resistant and anti-corrosion PVC plastic pipe kit and its preparation method Effective date of registration: 20221221 Granted publication date: 20210928 Pledgee: Bank of China Limited by Share Ltd. Cangzhou branch Pledgor: YIBO COMMUNICATION EQUIPMENT GROUP Co.,Ltd. Registration number: Y2022980027194 |
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Granted publication date: 20210928 Pledgee: Bank of China Limited by Share Ltd. Cangzhou branch Pledgor: YIBO COMMUNICATION EQUIPMENT GROUP Co.,Ltd. Registration number: Y2022980027194 |