CN110822190A - Bionic structure waterproof sealing rubber pad and preparation method thereof - Google Patents
Bionic structure waterproof sealing rubber pad and preparation method thereof Download PDFInfo
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- CN110822190A CN110822190A CN201911290665.XA CN201911290665A CN110822190A CN 110822190 A CN110822190 A CN 110822190A CN 201911290665 A CN201911290665 A CN 201911290665A CN 110822190 A CN110822190 A CN 110822190A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 358
- 238000007789 sealing Methods 0.000 title claims abstract description 122
- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 160
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 31
- 239000011593 sulfur Substances 0.000 claims abstract description 31
- 239000006229 carbon black Substances 0.000 claims abstract description 27
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 24
- MHKLKWCYGIBEQF-UHFFFAOYSA-N 4-(1,3-benzothiazol-2-ylsulfanyl)morpholine Chemical compound C1COCCN1SC1=NC2=CC=CC=C2S1 MHKLKWCYGIBEQF-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 12
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 12
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000008117 stearic acid Substances 0.000 claims abstract description 12
- 239000011787 zinc oxide Substances 0.000 claims abstract description 12
- 239000011358 absorbing material Substances 0.000 claims abstract description 8
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 230000008961 swelling Effects 0.000 claims description 120
- 239000002245 particle Substances 0.000 claims description 48
- 150000001875 compounds Chemical class 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 28
- 239000000835 fiber Substances 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 16
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 11
- 229920000728 polyester Polymers 0.000 claims description 11
- 101000986989 Naja kaouthia Acidic phospholipase A2 CM-II Proteins 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 238000003801 milling Methods 0.000 claims description 10
- 229920002472 Starch Polymers 0.000 claims description 9
- 238000003491 array Methods 0.000 claims description 9
- 235000019698 starch Nutrition 0.000 claims description 9
- 239000008107 starch Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 8
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims description 5
- 239000004088 foaming agent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 description 20
- 229920000459 Nitrile rubber Polymers 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 7
- 244000043261 Hevea brasiliensis Species 0.000 description 6
- 229920003052 natural elastomer Polymers 0.000 description 6
- 229920001194 natural rubber Polymers 0.000 description 6
- 239000004589 rubber sealant Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 235000001968 nicotinic acid Nutrition 0.000 description 2
- 241000237510 Placopecten magellanicus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Images
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
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
- F16L23/22—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of a material other than metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to the technical field of rubber pads, in particular to a bionic structure waterproof sealing rubber pad which is composed of a common sealing rubber unit and a water expansion rubber unit, wherein the water expansion rubber unit comprises the following components in parts by weight: water-swelling rubber: 100 parts of (A); water-absorbing material: 5-8 parts; silane coupling agent: 0.5-1.5 parts; stearic acid: 4-8 parts; an anti-aging agent: 1-2 parts; antiscorching agent CTP: 0.15-0.2 part; zinc oxide: 6-10 parts; accelerator NOBS: 2-3 parts of a solvent; accelerator DTDM: 0.1-0.3 part; sulfur: 1-3 parts; the common sealing rubber unit comprises the following components in parts by weight: ordinary sealing rubber: 100 parts of (A); high wear-resistant carbon black: 40-80 parts; silane coupling agent: 1.5-3 parts; stearic acid: 2-8 parts; antiscorching agent CTP: 0.15-0.2 part; zinc oxide: 4-10 parts; accelerator NOBS: 2-3 parts of a solvent; accelerator DTDM: 0.1 to 0.3 portion. The rubber pad designed by the invention has the compression resistance and tensile resistance of common sealing rubber, and simultaneously has good waterproof performance of water-swelling rubber, so that the comprehensive performance of the rubber pad is improved.
Description
Technical Field
The invention relates to the technical field of rubber pads, in particular to a waterproof sealing rubber pad with a bionic structure and a preparation method thereof.
Background
In water supply and drainage pipeline, especially on pipeline and pipeline adapting unit's the flange, often all can set up sealed rubber ring or cushion, along with the continuous increase of building height and the continuous improvement of living standard, people's water consumption increases year by year, this has just led to the fact pipeline pressure reinforcing, sealed pad in current market takes place the displacement as the pipeline, will cause pipeline junction to appear the clearance, sealed rubber ring has lost the sealed effect of stagnant water, will cause to leak, and single water inflation rubber pad is not enough although waterproof performance is excellent but bearing pressure intensity.
Bionics is the science of simulating biology, i.e. the study of the structure, material, function, energy conversion, information control, etc. of biological systems and its application to technical systems to improve existing technical engineering equipment, create new technological processes, building configurations, automation devices, etc., the task of which is to study the superior capabilities of biological systems and model them, and then apply these principles to design and manufacture new technical equipment. In recent years, bionics is very colorful in various fields, shells have a multilayer composite structure, are alternately soft and hard, and have extremely strong compressive capacity, and a new idea is provided for the design invention.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a bionic structure waterproof sealing rubber pad and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a waterproof sealing rubber pad with a bionic structure is composed of a common sealing rubber unit and a water expansion rubber unit, wherein the common sealing rubber unit comprises a first common sealing rubber unit and a second common sealing rubber unit, the water expansion rubber unit comprises a first water expansion rubber unit, a second water expansion rubber unit, a third water expansion rubber unit, a fourth water expansion rubber unit and a fifth water expansion rubber unit, the first common sealing rubber unit, the first water expansion rubber unit and the second common sealing rubber unit are of annular structures, the fifth water expansion rubber unit is of an annular structure which is sequentially nested from outside to inside, and the second water expansion rubber unit, the third water expansion rubber unit and the fourth water expansion rubber unit are of annular structures which are sequentially nested from outside to inside and are arranged in the second common sealing rubber unit;
the water-swelling rubber unit is prepared from the following raw materials in parts by weight: water-swelling rubber: 100 parts of (A); water-absorbing material: 5-8 parts; compounding carbon black: 40-80 parts; white carbon black: 5-15 parts; silane coupling agent: 0.5-1.5 parts; stearic acid: 4-8 parts; an anti-aging agent: 1-2 parts; antiscorching agent CTP: 0.15-0.2 part; zinc oxide: 6-10 parts; accelerator NOBS: 2-3 parts of a solvent; accelerator DTDM: 0.1-0.3 part; sulfur: 1-3 parts;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts of (A); high wear-resistant carbon black: 40-80 parts; white carbon black: 15-30 parts; silane coupling agent: 1.5-3 parts; stearic acid: 2-8 parts; antioxidant 4020: 3-5 parts; antiscorching agent CTP: 0.15-0.2 part; zinc oxide: 4-10 parts; accelerator NOBS: 2-3 parts of a solvent; accelerator DTDM: 0.1-0.3 part; sulfur: 1-3 parts.
Furthermore, the second water swelling rubber unit is formed by a plurality of second water swelling rubber particle uniform annular arrays, the fourth water swelling rubber unit is formed by a plurality of fourth water swelling rubber particle uniform annular arrays, and the fifth water swelling rubber unit is formed by a plurality of fifth water swelling rubber particle uniform annular arrays. Ordinary sealing rubber unit
Further, the water absorption material is composed of nanometer starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio of the nanometer starch essence to the polyacrylonitrile fiber is 5: 4: 1, the length of the polyacrylonitrile fiber is 1-3mm, and the length of the polyester fiber is 1-3 mm.
Further, the first common sealing rubber unit, the second common sealing rubber unit, the first water swelling rubber unit, the second water swelling rubber unit, the third water swelling rubber unit, the fourth water swelling rubber unit and the fifth water swelling rubber unit are distributed in an annular shape and are coaxial, and the thickness h2 of the water swelling rubber unit is 1-20 mm.
Further, the cross section of the second water swelling rubber particle is of an oval structure, the distance from the center of the oval to the common center of the circle is equal, the long side b2 of the oval is 2-8mm, the short side a2 of the oval is 1-4mm, the distance L2 between the centers of two adjacent ovals is 5-30mm, and the closest distance d2 between the center of the oval and the inner wall of the first water swelling rubber unit is 1-10 mm.
Further, the cross section of the third water swelling rubber particles is of a circular structure, the radius r of the circle is 2-6mm, the distance from the center of each circle to the common center of the circle is equal, the number of the third water swelling rubber particles is equal to that of the second water swelling rubber particles, and the vertical distance from the center of the circle to the inner wall of the second common sealing rubber unit is equal.
Furthermore, the cross section of the fourth water swelling rubber particle is of an oval structure, the long side b1 of the oval structure where the fourth water swelling rubber particle is located is 2-8mm, the short side a1 is 1-4mm, the distance L1 between the centers of two adjacent ovals is 5-30mm, and the closest distance d1 from the outer ring of the fifth water swelling rubber unit is 1-10 mm.
Further, the thickness h1 of the first and second general sealing rubber units is h2+2 mm.
Furthermore, the difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 2-20mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water swelling rubber unit is 2-20mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 5-30mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water swelling rubber unit is 2-20 mm.
The shape of the second water swelling rubber particle is the same as that of the fourth water swelling rubber particle, so that the second water swelling rubber unit, the third water swelling rubber unit and the fourth water swelling rubber unit in the second common sealing rubber unit are complementary in structure.
The first common sealing rubber unit, the first water swelling rubber unit and the second common sealing rubber unit are in an annular structure and form a structure complementation with the fifth water swelling rubber unit;
a preparation method of a bionic structure waterproof sealing rubber gasket is used for preparing the bionic structure waterproof sealing rubber gasket and comprises the following steps:
firstly, preparing common sealing rubber unit rubber material, controlling the rotor speed of an internal mixer to be 40-80RPM, the temperature to be 130-150 ℃ and the upper plug pressure to be 30-50N/CM 2.
(1) Adding wear-resistant rubber to press the top bolt, and plasticating in an internal mixer for 120-180 seconds;
(2) lifting the top plug, adding other materials except the accelerant, the sulfur and the foaming agent, pressing the top plug and keeping for 120-180 seconds;
(3) and (3) after the prepared rubber compound is air-cooled for 1-2 hours, adding an accelerator NOBS and an accelerator DTDM into an open mill, and carrying out open milling for 8-15 times at the temperature of 60-75 ℃.
(4) And (3) after the prepared rubber compound is air-cooled for 2-4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, the open mill is opened for 8-15 times, the thickness of the formed rubber sheet is 1-10mm, and the rubber sheet is placed at room temperature for 12-24 hours for later use after being formed.
And secondly, preparing a water-swelling rubber unit sizing material by controlling the rotor speed of the internal mixer to be 40-80RPM, the temperature to be 130-150 ℃ and the upper plug pressure to be 30-50N/CM 2.
(1) Adding foamed rubber to press the top bolt, and plasticating in an internal mixer for 120-180 seconds;
(2) lifting the top plug, adding other materials except the accelerant and the sulfur, pressing the top plug and keeping for 120-180 seconds;
(3) and (3) after the prepared rubber compound is air-cooled for 1-2 hours, adding an accelerator NOBS and an accelerator DTDM into an open mill, and carrying out open milling for 8-15 times at the temperature of 60-75 ℃.
(4) And (3) after the prepared rubber compound is air-cooled for 2-4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, the open mill is opened for 8-15 times, the thickness of the formed rubber sheet is 5-10mm, and the rubber sheet is placed at room temperature for 12-24 hours after being formed for later use.
And thirdly, the common sealing rubber and the water-swelling rubber prepared in the first step and the second step are combined by compression molding according to the respective structural shapes, and then the rubber is put into a mold to be pressurized for 5-20MP, heated for 130-150 ℃ and cooled for 30 minutes after 10-30 minutes, and the preparation is finished.
The waterproof sealing rubber pad with the bionic structure has the beneficial effects that: the invention designs the rubber gasket, adopts the compression-resistant principle of deep sea shells, designs the sealing gasket structure with soft and hard combination, and embeds the round particles and the oval particles in the sealing gasket structure to achieve the purposes of compression resistance and water resistance.
Drawings
FIG. 1 is a schematic structural view of a bionic waterproof sealing rubber pad in front view;
fig. 2 is a schematic structural view of a longitudinal section H-H of the bionic waterproof sealing rubber pad.
In the figure: A. a first common rubber sealant unit, a second common rubber sealant unit, a third water swelling rubber unit, a fourth water swelling rubber unit, a fifth water swelling rubber unit, a third water swelling rubber unit, a fourth water swelling rubber unit, a fifth water swelling rubber unit, R1, an inner ring radius of the fifth water swelling rubber unit, R2, an outer ring radius of the fifth water swelling rubber unit or an inner ring radius of the second common rubber sealant unit, R3, an inner ring radius of the first water swelling rubber unit or an inner ring radius of the first common rubber sealant unit, R4, an outer ring radius of the first water swelling rubber unit or an inner ring radius of the first common rubber sealant unit, R5, an outer ring radius of the first common rubber sealant unit, L1, a distance between elliptical center points of two adjacent fourth water swelling rubber particles, L2, a distance between elliptical center points of two adjacent second water swelling rubber particles, l3 and L4, the nearest distance between the circle center of the second water-swelling rubber particle and the center of the ellipse of the adjacent two third water-swelling rubber particles, a1, the short side of the ellipse of the fourth water-swelling rubber particle, b1, the long side of the ellipse of the fourth water-swelling rubber particle, a2, the short side of the ellipse of the second water-swelling rubber particle, b1, the long side of the ellipse of the second water-swelling rubber particle, d1, the nearest distance from the fifth water swelling rubber unit inner ring to the edge of the fourth water swelling rubber particle, the nearest distance from d2 from the first water swelling rubber unit inner ring to the elliptical edge of the third water swelling rubber particle, h1, the thickness of the common sealing rubber, h2, the thickness of the water swelling rubber, the thickness difference of k1, the upper surface of the common sealing rubber and the upper surface of the water swelling rubber, and the thickness difference of k2, the lower surface of the common sealing rubber and the lower surface of the water swelling rubber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1: referring to fig. 1-2, the bionic waterproof sealing rubber pad of the embodiment comprises a first common sealing rubber unit a and a second common sealing rubber unit C, the water swelling rubber unit comprises a first water swelling rubber unit B, a second water swelling rubber unit D, a third water swelling rubber unit E, a fourth water swelling rubber unit F and a fifth water swelling rubber unit G, the first common sealing rubber unit A, the first water swelling rubber unit B and the second common sealing rubber unit C are of annular structures, the fifth water swelling rubber unit G is of an annular structure which is sequentially nested from outside to inside, and the second water swelling rubber unit D, the third water swelling rubber unit E and the fourth water swelling rubber unit F are of annular structures which are embedded in the second common sealing rubber unit C from outside to inside;
the second water swelling rubber unit D is formed by a plurality of second water swelling rubber particle uniform annular arrays, the fourth water swelling rubber unit F is formed by a plurality of fourth water swelling rubber particle uniform annular arrays, and the fifth water swelling rubber unit G is formed by a plurality of fifth water swelling rubber particle uniform annular arrays.
The first common sealing rubber unit A, the second common sealing rubber unit C, the first water swelling rubber unit B, the second water swelling rubber unit D, the third water swelling rubber unit E, the fourth water swelling rubber unit F and the fifth water swelling rubber unit G are distributed in an annular shape and are coaxial, the intersection point of the cross section of the first common sealing rubber unit A, the third common sealing rubber unit E, the fourth water swelling rubber unit F and the fifth water swelling rubber unit G is a common circle center, and the thickness h2 of each water swelling rubber unit is 13 mm.
The cross section of the second water swelling rubber particle is of an oval structure, the distance from the center of the oval to the center of the common circle is equal, the long side B2 of the oval is 4mm, the short side a2 of the oval is 1mm, the distance L2 between the centers of two adjacent ovals is 5mm, and the shortest distance d2 from the center of the oval to the inner wall of the first water swelling rubber unit B is 1 mm.
The cross section of the third water swelling rubber particle is of a circular structure, the radius r of the circle is 2mm, the distance from the center of each circle to a common center of the circle is equal, the number of the third water swelling rubber particles is equal to that of the second water swelling rubber particles, the distance from the center of each circle to the center of each two adjacent ellipses is equal, namely L3 is equal to L4, and the vertical distance from the center of each circle to the inner wall of the second common sealing rubber unit C is equal.
The cross section of the fourth water swelling rubber particle is of an oval structure, the distance from the center of the oval where the fourth water swelling rubber particle is to the public circle center is equal, the long side b1 of the oval structure where the fourth water swelling rubber particle is 4mm, the short side a1 of the oval structure is 1mm, the distance L1 between the centers of two adjacent ovals is 5mm, and the nearest distance d1 from the outer ring of the fifth water swelling rubber unit G is 1 mm.
The difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 3mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water swelling rubber unit is 2mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 6mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water swelling rubber unit is 2 mm.
The outer surfaces of some deep sea shells in deep sea fluctuate in a wavy manner, the shells of the shells alternate in hardness from inside to outside, because the deep sea scallops live in the sea of hundreds of meters or even thousands of meters, the shells bear great seawater pressure all the time, and the wavy geometric surfaces and the internal alternate in hardness structure can enable the shells to bear greater compressive strength under the same thickness, the structure is formed gradually through the evolution of hundreds of millions of years, and the stress is very scientific and reasonable. The structure of the sealing rubber pad with alternating hardness and softness is designed, and meanwhile, the surface of the sealing rubber pad is composed of circles and ellipses with different rules and depths, so that the purposes of compression resistance and water resistance are achieved.
Proper non-smooth processing on the sealing surface is the development direction of future mechanical sealing elements, in order to increase the bearing capacity and oil film rigidity between the sealing elements and reduce friction and abrasion, Etsion I and Burstein L propose a sealing element model with a regular non-smooth surface structure in 1996, and when hemispherical micro-pits are uniformly distributed on a sealing surface, the sealing performance is greatly improved. This patent has added circular and oval pit structure on sealing rubber pad surface according to this principle and has fine sealed effect.
The water-swellable rubber unit of this example was prepared from the following raw materials in parts by weight: water-swelling rubber: 100 parts of (A); water-absorbing material: 5 parts of a mixture; compounding carbon black: 40 parts of a mixture; white carbon black: 5 parts of a mixture; silane coupling agent: 0.5 part; stearic acid: 4 parts of a mixture; an anti-aging agent: 1 part; antiscorching agent CTP: 0.15 part; zinc oxide: 6 parts of (1); accelerator NOBS: 2 parts of (1); accelerator DTDM: 0.1 part; sulfur: 1 part;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts of (A); high wear-resistant carbon black: 40 parts of a mixture; white carbon black: 15 parts of (1); silane coupling agent: 1.5 parts; stearic acid: 2 parts of (1); antioxidant 4020: 3 parts of a mixture; antiscorching agent CTP: 0.15 part; zinc oxide: 4 parts of a mixture; accelerator NOBS: 2 parts of (1); accelerator DTDM: 0.1 part; sulfur: 1 part.
The water swelling rubber is composed of natural rubber, nitrile rubber and water-absorbent resin, and the mass ratio of the water swelling rubber to the nitrile rubber is 4: 4: 2.
the water absorption material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio of the water absorption material to the nano starch essence is 5: 4: 1, the length of the polyacrylonitrile fiber is 1mm, and the length of the polyester fiber is 1 mm.
The composite carbon black consists of N774, N660, N330 and N234, and the mass ratio of the N774 to the N660 to the N330 is 3: 3: 3: 1.
the common sealing rubber is composed of nitrile rubber, natural rubber and chloroprene rubber in a mass ratio of 6:3: 1.
The high wear-resistant carbon black consists of N774, N660, N330 and N234, and the mass ratio of the N774 to the N660 to the N330 is 5: 2: 2: 1.
the preparation method of the bionic structure waterproof sealing rubber gasket comprises the following steps:
firstly, preparing a common sealing rubber unit sizing material, controlling the speed of an internal mixer rotor to be 40RPM, the temperature to be 130 ℃, and the top plug pressure to be 30N/CM 2.
(1) Adding foamed rubber, pressing a top bolt, and plasticating for 120 seconds in an internal mixer;
(2) lifting the top plug, adding other materials except the accelerator, the sulfur and the foaming agent, pressing the top plug for 120 seconds;
(3) after the prepared rubber compound is air-cooled for 1 hour, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be at 60 ℃ for 8 times of open milling.
(4) And (3) after the prepared rubber compound is air-cooled for 2 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 60 ℃, the open mill is used for 8 times, and the rubber compound is placed at room temperature for 12 hours after being formed for later use.
And secondly, preparing a water-swelling rubber unit sizing material, controlling the speed of an internal mixer rotor to be 40RPM, controlling the temperature to be 130 ℃, and controlling the top plug pressure to be 30N/CM 2.
(1) Adding wear-resistant rubber, pressing a top bolt, and plasticating for 120 seconds in an internal mixer;
(2) lifting the top plug, adding other materials except the accelerant and the sulfur, pressing the top plug for 120 seconds;
(3) after the prepared rubber compound is air-cooled for 1 hour, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be at 60 ℃ for 8 times of open milling.
(4) And (3) after the prepared rubber compound is air-cooled for 2 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 75 ℃, the open mill is used for 8 times, and the rubber compound is placed at room temperature for 12 hours after being formed for later use.
And thirdly, carrying out compression molding and combination on the common sealing rubber and the water-swelling rubber prepared in the first step and the second step according to respective structural shapes, then putting the rubber and the water-swelling rubber into a mold, pressurizing by 5MP, heating to 130 ℃, cooling for 30 minutes, and then completing the preparation.
Example 2: the waterproof sealing rubber pad with the bionic structure is different from the waterproof sealing rubber pad with the bionic structure in embodiment 1 in that: the components are calculated according to the weight portion: water-swelling rubber: 100 parts of (A); water-absorbing material: 7 parts; compounding carbon black: 60 parts; white carbon black: 10 parts of (A); silane coupling agent: 1 part; stearic acid: 6 parts of (1); an anti-aging agent: 1.5 parts; antiscorching agent CTP: 0.17 part; zinc oxide: 8 parts of a mixture; accelerator NOBS: 2.5 parts; accelerator DTDM: 0.2 part; sulfur: 2 parts of (1); the common sealing rubber unit comprises the following components in parts by weight: ordinary sealing rubber: 100 parts of (A); high wear-resistant carbon black: 60 parts; white carbon black: 23 parts; silane coupling agent: 2.2 parts of; stearic acid: 5 parts of a mixture; antioxidant 4020: 4 parts of a mixture; antiscorching agent CTP: 0.18 part; zinc oxide: 7 parts; accelerator N OBS: 2.5 parts; accelerator DTDM: 0.2 part; sulfur: and 2 parts.
The water swelling rubber is composed of natural rubber, nitrile rubber and water-absorbent resin, and the mass ratio of the water swelling rubber to the nitrile rubber is 4: 4: 2.
the water absorption material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio of the water absorption material to the nano starch essence is 5: 4: 1, the length of the polyacrylonitrile fiber is 2mm, and the length of the polyester fiber is 2 mm.
The composite carbon black consists of N774, N660, N330 and N234, and the mass ratio of the N774 to the N660 to the N330 is 3: 3: 3: 1.
the common sealing rubber is composed of nitrile rubber, natural rubber and chloroprene rubber in a mass ratio of 6:3: 1.
The high wear-resistant carbon black consists of N774, N660, N330 and N234, and the mass ratio of the N774 to the N660 to the N330 is 5: 2: 2: 1.
the invention also provides a preparation method of the bionic structure waterproof sealing rubber gasket, which comprises the following steps:
firstly, preparing the common sealing rubber unit sizing material, controlling the rotor speed of an internal mixer at 60RPM, controlling the temperature at 140 ℃ and controlling the upper plug pressure at 40N/CM 2.
(1) Adding foamed rubber, pressing a top bolt, and plasticating in an internal mixer for 160 seconds;
(2) lifting the top plug, adding other materials except the accelerator, the sulfur and the foaming agent, pressing the top plug for 160 seconds;
(3) after the prepared rubber compound is air-cooled for 1.5 hours, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be at a temperature of 68 ℃ for 11 times of open milling.
(4) And (3) after the prepared rubber compound is air-cooled for 3 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 80 ℃, the open mill is used for 11 times, and the rubber compound is placed at room temperature for 18 hours after being formed for later use.
And secondly, preparing a water-swelling rubber unit sizing material, controlling the speed of an internal mixer rotor to be 60RPM, controlling the temperature to be 140 ℃, and controlling the top plug pressure to be 40N/CM 2.
(1) Adding wear-resistant rubber, pressing a top bolt, and plasticating in an internal mixer for 160 seconds;
(2) lifting the top plug, adding other materials except the accelerant and the sulfur, pressing the top plug for 160 seconds;
(3) after the prepared rubber compound is air-cooled for 1.5 hours, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be at a temperature of 68 ℃ for 11 times of open milling.
(4) After the prepared rubber compound is air-cooled for 2.5 hours, sulfur is added into an open mill, the temperature of the open mill is required to be 68 ℃, the open mill is opened for 11 times, and the rubber compound is placed at room temperature for 18 hours after being formed for later use.
And thirdly, carrying out compression molding and combination on the common sealing rubber and the water-swelling rubber prepared in the first step and the second step according to respective structural shapes, then putting the rubber and the water-swelling rubber into a mold, pressurizing by 12MP, heating to 140 ℃ for 20 minutes, and carrying out water cooling for 30 minutes to finish the preparation.
Example 3, this example differs from example 1 in that the water-swellable rubber unit is prepared from the following raw materials in parts by weight: water-swelling rubber: 100 parts of (A); water-absorbing material: 8 parts of a mixture; compounding carbon black: 80 parts of a mixture; white carbon black: 15 parts of (1); silane coupling agent: 1.5 parts; stearic acid: 8 parts of a mixture; an anti-aging agent: 2 parts of (1); antiscorching agent CTP: 0.2 part; zinc oxide: 10 parts of (A); accelerator NOBS: 3 parts of a mixture; accelerator DTDM: 0.3 part; sulfur: 3 parts of a mixture;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts of (A); high wear-resistant carbon black: 80 parts of a mixture; white carbon black: 30 parts of (1); silane coupling agent: 3 parts of a mixture; stearic acid: 8 parts of a mixture; antioxidant 4020: 5 parts of a mixture; antiscorching agent CTP: 0.2 part; zinc oxide: 10 parts of (A); accelerator NOBS: 3 parts of a mixture; accelerator DTDM: 0.3 part; sulfur: and 3 parts.
The water swelling rubber is composed of natural rubber, nitrile rubber and water-absorbent resin, and the mass ratio of the water swelling rubber to the nitrile rubber is 4: 4: 2.
the water absorption material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio of the water absorption material to the nano starch essence is 5: 4: 1, the length of the polyacrylonitrile fiber is 3mm, and the length of the polyester fiber is 3 mm.
The composite carbon black consists of N774, N660, N330 and N234, and the mass ratio of the N774 to the N660 to the N330 is 3: 3: 3: 1.
the common sealing rubber is composed of nitrile rubber, natural rubber and chloroprene rubber in a mass ratio of 6:3: 1. The high wear-resistant carbon black consists of N774, N660, N330 and N234, and the mass ratio of the N774 to the N660 to the N330 is 5: 2: 2: 1.
the preparation method of the bionic structure waterproof sealing rubber gasket comprises the following steps:
firstly, preparing a common sealing rubber unit sizing material, controlling the rotor speed of an internal mixer at 80RPM, controlling the temperature at 150 ℃ and controlling the top plug pressure at 50N/CM 2.
(1) Adding foamed rubber, pressing a top bolt, and plasticating in an internal mixer for 180 seconds;
(2) lifting the top plug, adding other materials except the accelerator, the sulfur and the foaming agent, pressing the top plug for 180 seconds;
(3) after the prepared rubber compound is air-cooled for 2 hours, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be at 75 ℃ for open milling for 15 times.
(4) And (3) after the prepared rubber compound is air-cooled for 4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 75 ℃, the open mill is used for 15 times, and the rubber compound is placed at room temperature for 24 hours after being formed for later use.
And secondly, preparing a water-swelling rubber unit sizing material, controlling the speed of an internal mixer rotor to be 80RPM, controlling the temperature to be 150 ℃ and controlling the top plug pressure to be 50N/CM 2.
(1) Adding wear-resistant rubber, pressing a top bolt, and plasticating in an internal mixer for 180 seconds;
(2) lifting the top plug, adding other materials except the accelerant and the sulfur, pressing the top plug and keeping for 180 seconds;
(3) after the prepared rubber compound is air-cooled for 2 hours, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be at 75 ℃ for open milling for 15 times.
(4) And (3) after the prepared rubber compound is air-cooled for 4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 75 ℃, the open mill is used for 15 times, and the rubber compound is placed at room temperature for 24 hours after being formed for later use.
And thirdly, carrying out compression molding and combination on the common sealing rubber and the water-swelling rubber prepared in the first step and the second step according to respective structural shapes, then putting the rubber and the water-swelling rubber into a mold, pressurizing by 20MP, heating to 150 ℃ for 15 minutes, and carrying out water cooling for 15 minutes to finish the preparation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Comparative example 1: the comparative example is different from the example 1 in that the bionic structure waterproof sealing rubber gasket is prepared by adopting the common rubber in the example 1.
Comparative example 2: the comparative example is different from the example 1 in that the bionic structure waterproof sealing rubber gasket is prepared by adopting the water swelling rubber in the example 1.
Table 1 shows the specific measurement parameters of the samples of the sealing rubber gaskets of the examples:
example 4: this example is different from example 1 in that the thickness h2 of the water-swellable rubber unit is 8 mm. The cross section of the second water swelling rubber particle is of an oval structure, the distance from the center of the oval to the center of the common circle is equal, the long side B2 of the oval is 3mm, the short side a2 of the oval is 2mm, the distance L2 between the centers of two adjacent ovals is 6mm, and the closest distance d2 from the center of the oval to the inner wall of the first water swelling rubber unit B is 2 mm. The cross section of the third water swelling rubber particle is of a circular structure, the radius r of the circle is 3mm, the long side b1 of the oval structure where the fourth water swelling rubber particle is located is 3mm, the short side a1 is 2mm, the distance L1 between the centers of two adjacent ellipses is 6mm, and the nearest distance d1 from the outer ring of the fifth water swelling rubber unit G is 2 mm.
The difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 9mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water swelling rubber unit is 6mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 18mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water swelling rubber unit is 6 mm.
Example 5, this example differs from example 1 in that the thickness h2 of the water-swellable rubber unit is 20 mm.
The cross section of the second water swelling rubber particle is of an oval structure, the distance from the center of the oval to the center of the common circle is equal, the long side B2 of the oval is 6mm, the short side a2 of the oval is 3mm, the distance L2 between the centers of two adjacent ovals is 8mm, and the closest distance d2 from the center of the oval to the inner wall of the first water swelling rubber unit B is 3 mm.
The cross section of the third water swelling rubber particle is of a circular structure, the radius r of the circle is 4mm, the long side b6 of the oval structure where the fourth water swelling rubber particle is located is 4mm, the short side a1 is 3mm, the distance L1 between the centers of two adjacent ellipses is 8mm, and the nearest distance d1 from the outer ring of the fifth water swelling rubber unit G is 3 mm.
The difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 10mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water swelling rubber unit is 8mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 26mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water swelling rubber unit is 8 mm.
Table 2 shows the specific measurement parameters of the sealing rubber pad samples of the examples:
as can be seen from the above table, the waterproof sealing rubber gasket with the composite structure has the compression resistance and the tensile resistance of common sealing rubber, and also has the good waterproof performance of water-swelling rubber, so that the comprehensive performance is obviously improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a waterproof sealing rubber pad of bionic structure, its characterized in that, this rubber pad comprises ordinary sealing rubber unit and water inflation rubber unit, ordinary sealing rubber unit includes first ordinary sealing rubber unit (A) and second ordinary sealing rubber unit (C), water inflation rubber unit includes first water inflation rubber unit (B), second water inflation rubber unit (D), third water inflation rubber unit (E), fourth water inflation rubber unit (F) and fifth water inflation rubber unit (G), first ordinary sealing rubber unit (A), first water inflation rubber unit (B), second ordinary sealing rubber unit (C) are the annular structure that annular structure and fifth water inflation rubber unit (G) nested in proper order for outside-in, second water inflation rubber unit (D), third water inflation rubber unit (E), The fourth water swelling rubber unit (F) is of an annular structure embedded in the second common sealing rubber unit (C) from outside to inside;
the water-swelling rubber unit is prepared from the following raw materials in parts by weight: water-swelling rubber: 100 parts of (A); water-absorbing material: 5-8 parts; compounding carbon black: 40-80 parts; white carbon black: 5-15 parts; silane coupling agent: 0.5-1.5 parts; stearic acid: 4-8 parts; an anti-aging agent: 1-2 parts; antiscorching agent CTP: 0.15-0.2 part; zinc oxide: 6-10 parts; accelerator NOBS: 2-3 parts of a solvent; accelerator DTDM: 0.1-0.3 part; sulfur: 1-3 parts;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts of (A); high wear-resistant carbon black: 40-80 parts; white carbon black: 15-30 parts; silane coupling agent: 1.5-3 parts; stearic acid: 2-8 parts; antioxidant 4020: 3-5 parts; antiscorching agent CTP: 0.15-0.2 part; zinc oxide: 4-10 parts; accelerator NOBS: 2-3 parts of a solvent; accelerator DTDM: 0.1-0.3 part; sulfur: 1-3 parts.
2. The waterproof sealing rubber pad with bionic structure as claimed in claim 1, wherein the second water swelling rubber unit (D) is formed by a plurality of uniform annular arrays of second water swelling rubber particles, the fourth water swelling rubber unit (F) is formed by a plurality of uniform annular arrays of fourth water swelling rubber particles, and the fifth water swelling rubber unit (G) is formed by a plurality of uniform annular arrays of fifth water swelling rubber particles. Ordinary sealing rubber unit.
3. The waterproof sealing rubber pad with the bionic structure as claimed in claim 1, wherein the water-absorbing material is composed of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio of the water-absorbing material to the polyester fiber is 5: 4: 1, the length of the polyacrylonitrile fiber is 1-3mm, and the length of the polyester fiber is 1-3 mm.
4. The waterproof sealing rubber pad with bionic structure as claimed in claim 1, wherein the first common sealing rubber unit (A), the second common sealing rubber unit (C), the first water swelling rubber unit (B), the second water swelling rubber unit (D), the third water swelling rubber unit (E), the fourth water swelling rubber unit (F) and the fifth water swelling rubber unit (G) are distributed in ring shape and are coaxial, and the thickness h2 of the water swelling rubber units is 1-20 mm.
5. The waterproof sealing rubber pad with bionic structure as claimed in claim 2, wherein the cross section of the second water-swelling rubber particles is an ellipse, the centers of the ellipses are equidistant from the common center, the long side B2 of the ellipse is 2-8mm, the short side a2 is 1-4mm, the distance L2 between the centers of two adjacent ellipses is 5-30mm, and the closest distance d2 between the centers of the ellipses and the inner wall of the first water-swelling rubber unit (B) is 1-10 mm.
6. The waterproof sealing rubber pad with bionic structure as claimed in claim 2, wherein the cross section of the third water-swelling rubber particles is circular, the radius r of the circle is 2-6mm, the distance from the center of each circle to the common center of the circle is equal, the number of the third water-swelling rubber particles is equal to the number of the second water-swelling rubber particles, and the vertical distance from the center of the circle to the inner wall of the second common sealing rubber unit (C) is equal.
7. The waterproof sealing rubber pad with bionic structure as claimed in claim 2, wherein the cross section of the fourth water-swelling rubber particles is oval structure, the long side b1 of the oval structure where the fourth water-swelling rubber particles are located is 2-8mm, the short side a1 is 1-4mm, the distance L1 between the centers of two adjacent ovals is 5-30mm, and the closest distance d1 to the outer ring of the fifth water-swelling rubber unit (G) is 1-10 mm.
8. The waterproof sealing rubber pad of bionic structure as claimed in claim 4, wherein the thickness h1 of the first and second ordinary sealing rubber units (A) and (C) is h2+2 mm.
9. The waterproof sealing rubber pad with bionic structure as claimed in claim 1, wherein the difference between the outer ring radius R5 and the inner ring radius R4 of the first ordinary sealing rubber unit is 2-20mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water swelling unit is 2-20mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second ordinary sealing rubber unit is 5-30mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water swelling rubber unit is 2-20 mm.
10. A method for preparing a waterproof sealing rubber gasket with a bionic structure, which is used for preparing the waterproof sealing rubber gasket with the bionic structure as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps:
firstly, preparing common sealing rubber unit rubber material, controlling the rotor speed of an internal mixer to be 40-80RPM, the temperature to be 130-150 ℃ and the upper plug pressure to be 30-50N/CM 2.
(1) Adding wear-resistant rubber to press the top bolt, and plasticating in an internal mixer for 120-180 seconds;
(2) lifting the top plug, adding other materials except the accelerant, the sulfur and the foaming agent, pressing the top plug and keeping for 120-180 seconds;
(3) and (3) after the prepared rubber compound is air-cooled for 1-2 hours, adding an accelerator NOBS and an accelerator DTDM into an open mill, and carrying out open milling for 8-15 times at the temperature of 60-75 ℃.
(4) And (3) after the prepared rubber compound is air-cooled for 2-4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, the open mill is used for 8-15 times, and the rubber compound is placed at room temperature for 12-24 hours after being formed for later use.
And secondly, preparing a water-swelling rubber unit sizing material by controlling the rotor speed of the internal mixer to be 40-80RPM, the temperature to be 130-150 ℃ and the upper plug pressure to be 30-50N/CM 2.
(1) Adding foamed rubber to press the top bolt, and plasticating in an internal mixer for 120-180 seconds;
(2) lifting the top plug, adding other materials except the accelerant and the sulfur, pressing the top plug and keeping for 120-180 seconds;
(3) and (3) after the prepared rubber compound is air-cooled for 1-2 hours, adding an accelerator NOBS and an accelerator DTDM into an open mill, and carrying out open milling for 8-15 times at the temperature of 60-75 ℃.
(4) And (3) after the prepared rubber compound is air-cooled for 2-4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, the open mill is used for 8-15 times, and the rubber compound is placed at room temperature for 12-24 hours after being formed for later use.
And thirdly, the common sealing rubber and the water-swelling rubber prepared in the first step and the second step are combined by compression molding according to the respective structural shapes, and then the rubber is put into a mold to be pressurized for 5-20MP, heated for 130-150 ℃ and cooled for 30 minutes after 10-30 minutes, and the preparation is finished.
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| CN112457537A (en) * | 2020-12-01 | 2021-03-09 | 际华三五一七橡胶制品有限公司 | Natural rubber material for sealing ring of water supply and drainage pipeline and preparation method thereof |
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