CN114525012A - High-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket and preparation process thereof - Google Patents
High-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket and preparation process thereof Download PDFInfo
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- CN114525012A CN114525012A CN202210138026.7A CN202210138026A CN114525012A CN 114525012 A CN114525012 A CN 114525012A CN 202210138026 A CN202210138026 A CN 202210138026A CN 114525012 A CN114525012 A CN 114525012A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920000642 polymer Polymers 0.000 title claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 26
- 239000003292 glue Substances 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- -1 polyethylene Polymers 0.000 claims description 31
- 239000004698 Polyethylene Substances 0.000 claims description 29
- 229920000573 polyethylene Polymers 0.000 claims description 29
- 229920006324 polyoxymethylene Polymers 0.000 claims description 21
- 229920001169 thermoplastic Polymers 0.000 claims description 19
- 239000004416 thermosoftening plastic Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 15
- 239000011324 bead Substances 0.000 claims description 13
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229920001568 phenolic resin Polymers 0.000 claims description 9
- 239000005011 phenolic resin Substances 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 6
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- SBKRBXBQFDKYSO-UHFFFAOYSA-N (3-tert-butyl-4-hydroxy-5-methylphenyl) propanoate Chemical compound CCC(=O)OC1=CC(C)=C(O)C(C(C)(C)C)=C1 SBKRBXBQFDKYSO-UHFFFAOYSA-N 0.000 claims description 3
- 229920006228 ethylene acrylate copolymer Polymers 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004014 plasticizer Substances 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical group OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 5
- 238000000071 blow moulding Methods 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229930040373 Paraformaldehyde Natural products 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L59/00—Compositions of polyacetals; Compositions of derivatives of polyacetals
- C08L59/04—Copolyoxymethylenes
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/16—Solid spheres
- C08K7/18—Solid spheres inorganic
-
- 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
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/02—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention provides a high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket which comprises a cushion block, wherein the upper part of the cushion block is a semi-cylindrical protruding end, hard fillers are filled in the semi-cylindrical protruding end, the lower part of the cushion block is a horizontal end, and the horizontal end is sunken inwards to form a glue groove; the horizontal pipe fitting is prevented from being in direct contact with the steel structure beam, the preparation process of the anti-corrosion pipe gasket is further disclosed, the production process is simple, and the anti-corrosion pipe gasket has high hardness and anti-corrosion effect.
Description
Technical Field
The invention relates to the technical field of pipe fitting construction auxiliary materials, in particular to a high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket and a preparation process thereof.
Background
When petrochemical pipe laying, the direct and steel structure roof beam contact of petroleum horizontal pipe fitting often can appear, the not equidimension corruption can appear in the contact site of horizontal pipe fitting surface and steel structure roof beam after long-time the use, influence the life of horizontal pipe fitting, because the unsettled condition that is in the steel structure roof beam top can appear in the horizontal pipe fitting often, generally add the pad gasket messenger horizontal pipe fitting and steel structure roof beam no longer unsettled in the bottom of horizontal pipe fitting, play the supporting effect to horizontal pipe fitting, but in order to guarantee the structural strength of gasket, current gasket cushion generally adopts the metal material, the long-time easy electrochemical reaction that produces of cushion contact with the metal material of horizontal pipe fitting, thereby cause cushion itself or horizontal pipe fitting surface corrosion, influence life.
Disclosure of Invention
The invention aims to provide a high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket and a preparation process thereof aiming at the defects in the prior art, and discloses a cushion block capable of acting on a horizontal pipe fitting to avoid the direct contact of the horizontal pipe fitting and a steel structure beam, and a preparation process of the cushion block, wherein the production process is simple, and the cushion block has high hardness and an anticorrosive effect.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a high temperature resistant anticorrosive pipe gasket of polymer high rigidity which characterized in that: the glue groove comprises a cushion block, wherein the upper part of the cushion block is a semi-cylindrical protruding end, hard fillers are filled in the semi-cylindrical protruding end, the lower part of the cushion block is a horizontal end, and the horizontal end is sunken inwards to form a glue groove; the semi-cylindrical protruding end comprises the following raw materials in parts by weight: 90-120 parts of polyformaldehyde, 1-3 parts of polyethylene, 0.2-0.8 part of ESB wax and 0.05-0.5 part of antioxidant; the horizontal end comprises the following raw materials in parts by weight: 90-120 parts of polyformaldehyde, 10-20 parts of polyethylene, 5-8 parts of phenolic resin and 2-5 parts of curing agent; the cushion block is made of anticorrosive materials, generally plastic, the cushion block in the application is composed of a semi-column-shaped convex end and a horizontal end, hard fillers are filled in the semi-column-shaped convex end, the hard fillers are generally mixtures of metal and plastic, the hardness and the weight of the cushion block are increased, when the cushion block is used, the horizontal end at the bottom of the cushion block is fixedly connected with a connecting structure, so that the positioning effect on the cushion block is realized, the cushion block is fixed at the designated position of the horizontal pipe fitting and cannot fall off along with vibration, a good auxiliary effect is realized on the horizontal pipe fitting, the shearing force borne by the horizontal pipe fitting is reduced, the horizontal pipe fitting can be separated from a steel structure beam by the cushion block, the electrochemical reaction generated by contact between the horizontal pipe fitting and the steel structure beam is reduced, the corrosion possibility of the horizontal pipe fitting is reduced, the service life of the horizontal pipe fitting is favorably kept, and a large amount of glue can be smeared in a water tank, for fixation.
Optionally, the depth of the glue groove with the horizontal end being the height of the cushion block is 1/10-1/12 of the height of the cushion block.
Optionally, the hard filler is a mixture of thermoplastic and metal beads, and the volume ratio of the thermoplastic to the metal beads is 1: 1.
optionally, the polyoxymethylene is a copolyoxymethylene.
Optionally, the polyethylene is modified polyethylene, and the modified polyethylene is one or a mixture of maleic anhydride branched polyethylene and ethylene-acrylate copolymer.
Optionally, the antioxidant is triethylene glycol ether-bis (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate.
The preparation process of the high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket is characterized by comprising the following steps of:
mixing polyformaldehyde particles, polyethylene particles, ESB wax and an antioxidant according to a specific ratio, adding the mixture into a hopper of an extruder, heating and hot-melting the mixture by the extruder to extrude a tubular thermoplastic blank block, taking out the blank block, and putting the blank block into a first die with a semi-cylindrical cavity; fixing the blank block at the opening of the first mold, and introducing compressed air into the blank block to form a cavity from the bottom to the inner side of the blank block, so as to ensure that the edge of the blank block is attached to the inner wall of the mold; filling the heated hard filler in the cavity; after the hard filler is cooled and solidified, a second tubular mold is additionally arranged on the outer side of the first mold, polyformaldehyde, polyethylene, phenolic resin and a curing agent are mixed according to a specific proportion, are subjected to hot melting, are poured into the second mold, are cooled and shaped, are taken down, and are taken out of the cushion block; the application discloses a preparation method of a cushion block, which comprises the steps of firstly forming a hollow cavity in a blank block by utilizing a hollow blow molding method, shaping a semi-cylindrical protruding end of the cushion block while carrying out hollow blow molding, and filling a hard filler into the cavity after shaping.
Optionally, in the step of extruding the thermoplastic billet block in a tubular shape by the extruder, the volume of the extruded billet block is 2/3 of the volume of the semi-cylindrical cavity; the thickness of the semi-cylindrical protruding end in the finished product is ensured.
Optionally, in the step of heating the hard filler, the hard filler includes 400 to 500 parts by volume of metal beads and 450 to 600 parts by volume of liquid thermoplastic, the thermoplastic is a mixture of polyvinyl chloride resin and plasticizer dibutyl phthalate, and the diameter of the metal beads is 3 to 5 mm.
Optionally, in the step of additionally arranging a second tubular mold outside the first mold, a barrier strip with a height exceeding that of the second mold is placed in the middle of the second mold, so that the inner space of the second mold is separated from the barrier strip; the formation of the glue groove is convenient.
Based on the above, the high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket and the preparation process thereof not only disclose a cushion block capable of acting on a horizontal pipe fitting to avoid direct contact between the horizontal pipe fitting and a steel structure beam, but also disclose the preparation process of the cushion block, and the cushion block is simple in production process, and has strong hardness and anticorrosive effect.
Drawings
FIG. 1 is a schematic view of a spacer according to an embodiment of the present invention;
FIG. 2 is a schematic view of the inner structure of the spacer according to the embodiment of the present invention.
Reference numerals:
1-cushion block; 2-a half-cylindrical protruding end; 3-horizontal end; 4-glue tank; 5-a hard filler; 6-metal beads; 7-a thermoplastic; 8-cavity.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The technical features of the present invention may be combined with each other without conflict.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
As shown in fig. 1 and fig. 2, the high polymer high hardness high temperature resistant anticorrosion pipe pad of the present invention comprises a pad block 1, wherein the upper part of the pad block 1 is a semi-cylindrical protruding end 2, the interior of the semi-cylindrical protruding end 2 is filled with a hard filler 5, the lower part of the pad block 1 is a horizontal end 3, and the horizontal end 3 is recessed inward to form a glue groove; the semi-cylindrical protruding end 2 comprises the following raw materials in parts by weight: 90-120 parts of polyformaldehyde, 1-3 parts of polyethylene, 0.2-0.8 part of ESB wax and 0.05-0.5 part of antioxidant; the horizontal end 3 comprises the following raw materials in parts by weight: 90-120 parts of polyformaldehyde, 10-20 parts of polyethylene, 5-8 parts of phenolic resin and 2-5 parts of curing agent; the cushion block 1 is made of anticorrosive materials, generally plastic, the cushion block 1 in the application is composed of a semi-column-shaped convex end 2 and a horizontal end 3, the inner part of the hemispherical convex end is also filled with a hard filler 5, the hard filler 5 is generally a mixture of metal and plastic, the hardness and the weight of the cushion block 1 are increased, when the cushion block is used, the horizontal end 3 at the bottom of the cushion block 1 is fixedly connected with a connecting structure, so that the positioning effect on the cushion block 1 is realized, the cushion block 1 is fixed at the specified position of the horizontal pipe fitting and cannot fall off along with vibration, a good auxiliary effect is achieved on the horizontal pipe fitting, the shearing force borne by the horizontal pipe fitting is reduced, the cushion block 1 can separate the horizontal pipe fitting from a steel structure beam, the electrochemical reaction generated by contact between the horizontal pipe fitting and the steel structure beam is reduced, the corrosion possibility of the horizontal pipe fitting is reduced, the service life of the horizontal pipe fitting is favorably kept, and a large amount of glue can be smeared in a water tank, for fixation.
In some embodiments, the semi-cylindrical protruding end 2 comprises the following raw materials in parts by weight: 90 parts of polyformaldehyde, 1 part of polyethylene, 0.2 part of ESB wax and 0.05 part of antioxidant; the horizontal end 3 comprises the following raw materials in parts by weight: 90 parts of polyformaldehyde, 10 parts of polyethylene, 5 parts of phenolic resin and 2 parts of curing agent;
the semi-cylindrical protruding end 2 comprises the following raw materials in parts by weight: 120 parts of polyformaldehyde, 3 parts of polyethylene, 0.8 part of ESB wax and 0.5 part of antioxidant; the horizontal end 3 comprises the following raw materials in parts by weight: 120 parts of polyformaldehyde, 20 parts of polyethylene, 8 parts of phenolic resin and 5 parts of curing agent;
the semi-cylindrical protruding end 2 comprises the following raw materials in parts by weight: 100 parts of polyformaldehyde, 2 parts of polyethylene, 0.5 part of ESB wax and 0.3 part of antioxidant; the horizontal end 3 comprises the following raw materials in parts by weight: 110 parts of polyformaldehyde, 12 parts of polyethylene, 7.2 parts of phenolic resin and 3 parts of curing agent;
in some embodiments, the thickness of the horizontal end 3 is equal to the height of the cushion block 1, and the depth of the glue groove is 1/10-1/12 of the height of the cushion block 1.
In some embodiments, the hard filler 5 is made of a mixture of thermoplastic 7 and metal beads 6, the volume ratio of the thermoplastic 7 to the metal beads 6 being 1: 1.
in some embodiments, the polyoxymethylene is a copolyoxymethylene.
In some embodiments, the polyethylene is a modified polyethylene, which is one or a mixture of two of maleic anhydride branched polyethylene or an ethylene-acrylate copolymer.
In some embodiments, the antioxidant is triethylene glycol ether-bis (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate.
The preparation process of the high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket comprises the following steps:
mixing polyformaldehyde particles, polyethylene particles, ESB wax and an antioxidant according to a specific ratio, adding the mixture into a hopper of an extruder, heating and hot-melting the mixture by the extruder to extrude a tubular thermoplastic blank block, taking out the blank block, and putting the blank block into a first die with a semi-cylindrical cavity; fixing the position of the blank block at the opening part of the first mould, and introducing compressed air into the blank block to form a cavity 8 from the bottom to the inner side of the blank block so as to ensure that the edge of the blank block is attached to the inner wall of the mould; filling the heated hard filler 5 in the cavity 8; after the hard filler 5 is cooled and solidified, a second tubular mold is additionally arranged on the outer side of the first mold, polyformaldehyde, polyethylene, phenolic resin and a curing agent are mixed according to a specific proportion, are subjected to hot melting, are poured into the second mold, are cooled and shaped, are taken down, and are taken out of the cushion block 1; the application discloses a preparation method of a cushion block 1, which comprises the steps of firstly forming a hollow cavity 8 in a blank block by utilizing a hollow blow molding method, completing the molding of a semi-cylindrical convex end 2 of the cushion block 1 while carrying out hollow blow molding, and filling a hard filler 5 into the cavity 8 after shaping.
In some embodiments, in the step of extruding the thermoplastic green sheet in a tubular shape by the extruder, the volume of the extruded green sheet is 2/3 of the volume of the semicylindrical cavity; the thickness of the semi-cylindrical protruding end 2 in the finished product is ensured.
In some embodiments, in the step of heating the hard filler 5, the hard filler 5 includes 400 to 500 parts by volume of the metal beads 6, 450 to 600 parts by volume of the liquid thermoplastic 7, the thermoplastic 7 is a mixture of a polyvinyl chloride resin and a plasticizer of dibutyl phthalate, and the metal beads 6 have a diameter of 3 to 5 mm.
In some embodiments, in the step of adding the second mold in a tubular shape on the outer side of the first mold, a barrier strip with a height exceeding that of the second mold is placed in the middle of the second mold, so that the inner space of the second mold is separated from the barrier strip; the formation of the glue groove is convenient.
Based on the above, the high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket and the preparation process thereof not only disclose the cushion block 1 capable of acting on the horizontal pipe fitting to avoid the direct contact between the horizontal pipe fitting and the steel structure beam, but also disclose the preparation process of the cushion block 1, and the production process is simple and has strong hardness and anticorrosive effect.
It will be understood that the present application is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. The utility model provides a high temperature resistant anticorrosive pipe gasket of polymer high rigidity which characterized in that: the glue groove is characterized by comprising a cushion block, wherein the upper part of the cushion block is a semi-cylindrical protruding end, hard fillers are filled in the semi-cylindrical protruding end, the lower part of the cushion block is a horizontal end, and the horizontal end is sunken inwards to form a glue groove; the semi-cylindrical protruding end comprises the following raw materials in parts by weight: 90-120 parts of polyformaldehyde, 1-3 parts of polyethylene, 0.2-0.8 part of ESB wax and 0.05-0.5 part of antioxidant; the horizontal end comprises the following raw materials in parts by weight: 90-120 parts of polyformaldehyde, 10-20 parts of polyethylene, 5-8 parts of phenolic resin and 2-5 parts of curing agent.
2. The high-polymer high-hardness high-temperature-resistant anticorrosive pipe gasket as claimed in claim 1, wherein: the thickness of the horizontal end is the height of the cushion block, and the depth of the glue groove is 1/10-1/12 of the height of the cushion block.
3. The high-molecular high-hardness high-temperature-resistant anticorrosive pipe gasket as claimed in claim 1, wherein: the hard filler is a mixture of thermoplastic and metal beads, and the volume ratio of the thermoplastic to the metal beads is 1: 1.
4. the high-molecular high-hardness high-temperature-resistant anticorrosive pipe gasket as claimed in claim 1, wherein: the polyformaldehyde is copolyoxymethylene.
5. The high-molecular high-hardness high-temperature-resistant anticorrosive pipe gasket as claimed in claim 1, wherein: the polyethylene is modified polyethylene, and the modified polyethylene is one or a mixture of maleic anhydride branched polyethylene and ethylene-acrylate copolymer.
6. The high-molecular high-hardness high-temperature-resistant anticorrosive pipe gasket as claimed in claim 1, wherein: the antioxidant is triethylene glycol ether-bis (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate.
7. The preparation process of the high-molecular high-hardness high-temperature-resistant anticorrosive pipe gasket according to claim 1 is characterized by comprising the following steps of:
mixing polyformaldehyde particles, polyethylene particles, ESB wax and an antioxidant according to a specific ratio, adding the mixture into a hopper of an extruder, heating and hot-melting the mixture by the extruder to extrude a tubular thermoplastic blank block, taking out the blank block, and putting the blank block into a first die with a semi-cylindrical cavity;
fixing the blank block at the opening of the first mold, and introducing compressed air into the blank block to form a cavity from the bottom to the inner side of the blank block, so as to ensure that the edge of the blank block is attached to the inner wall of the mold;
filling the heated hard filler in the cavity;
and after the hard filler is cooled and solidified, adding a second tubular mold on the outer side of the first mold, mixing and hot-melting polyformaldehyde, polyethylene, phenolic resin and a curing agent according to a specific proportion, pouring the mixture into the second mold, cooling and shaping, taking down the first mold and the second mold, and taking out the cushion block.
8. The process for preparing the high molecular weight high hardness high temperature resistant anticorrosion pipe gasket as claimed in claim 7, wherein the step of extruding the thermoplastic billet in a tubular shape by the extruder comprises the step of extruding 2/3 the volume of the extruded billet is the volume of the semi-cylindrical cavity.
9. The preparation process of the high-molecular high-hardness high-temperature-resistant anticorrosive pipe gasket according to claim 7, comprising the step of heating the hard filler, wherein the hard filler comprises 400-500 parts by volume of metal beads and 450-600 parts by volume of liquid thermoplastic, the thermoplastic is a mixture of polyvinyl chloride resin and plasticizer dibutyl phthalate, and the diameter of the metal beads is 3-5 mm.
10. The preparation process of the high-molecular high-hardness high-temperature-resistant anticorrosive pipe gasket as claimed in claim 7, comprising the step of placing a barrier strip with a height exceeding that of the second mold in the middle of the second mold in the step of additionally arranging the second mold in a tubular shape on the outer side of the first mold, so that the inner space of the second mold is separated from the barrier strip.
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| CN202210138026.7A CN114525012B (en) | 2022-02-15 | 2022-02-15 | High-molecular high-hardness high-temperature-resistant anti-corrosion pipe pad and preparation process thereof |
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| CN202210138026.7A CN114525012B (en) | 2022-02-15 | 2022-02-15 | High-molecular high-hardness high-temperature-resistant anti-corrosion pipe pad and preparation process thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088208A (en) * | 2006-09-29 | 2008-04-17 | Asahi Organic Chem Ind Co Ltd | Expandable phenol resin composition and metal siding |
| CN104559626A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | High-temperature-resistant and corrosion-resistant coating, high-temperature-resistant and corrosion-resistant material and preparation method of high-temperature-resistant and corrosion-resistant material |
| US20190262862A1 (en) * | 2018-02-23 | 2019-08-29 | T.F. Warren Group Corporation | Method for Applying a Coating in a Tubular |
| CN110744845A (en) * | 2019-10-30 | 2020-02-04 | 张业毅 | Preparation method of HDPE (high-density polyethylene) pipe |
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2022
- 2022-02-15 CN CN202210138026.7A patent/CN114525012B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088208A (en) * | 2006-09-29 | 2008-04-17 | Asahi Organic Chem Ind Co Ltd | Expandable phenol resin composition and metal siding |
| CN104559626A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | High-temperature-resistant and corrosion-resistant coating, high-temperature-resistant and corrosion-resistant material and preparation method of high-temperature-resistant and corrosion-resistant material |
| US20190262862A1 (en) * | 2018-02-23 | 2019-08-29 | T.F. Warren Group Corporation | Method for Applying a Coating in a Tubular |
| CN110744845A (en) * | 2019-10-30 | 2020-02-04 | 张业毅 | Preparation method of HDPE (high-density polyethylene) pipe |
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| CN114525012B (en) | 2024-02-20 |
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