CN113442514B - Ultrahigh-pressure hydraulic hose and preparation method thereof - Google Patents

Ultrahigh-pressure hydraulic hose and preparation method thereof Download PDF

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Publication number
CN113442514B
CN113442514B CN202110644256.6A CN202110644256A CN113442514B CN 113442514 B CN113442514 B CN 113442514B CN 202110644256 A CN202110644256 A CN 202110644256A CN 113442514 B CN113442514 B CN 113442514B
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parts
layer
rubber
buffer layer
winding
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CN113442514A (en
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吴振亭
阎科
张富宣
岳斌斌
李攀辉
庞付林
鲍威
郭建锋
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Henan Yibo Technology Co ltd
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Henan Yibo Technology Co ltd
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    • 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
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/02—Layer formed of wires, e.g. mesh
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/06—Layered products comprising a layer of metal comprising metal 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
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • 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
    • 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
    • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • 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
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    • B32B25/12—Layered products comprising a layer of natural or synthetic rubber comprising natural rubber
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    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
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    • B32B25/16—Layered products comprising a layer of natural or synthetic rubber comprising polydienes homopolymers or poly-halodienes homopolymers
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    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/263—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer having non-uniform thickness
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
    • 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
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    • 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
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • 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
    • 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
    • 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
    • C08L9/06—Copolymers with styrene
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • 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
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • 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
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
    • 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
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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention belongs to the technical field of rubber hoses, and discloses an ultrahigh pressure hydraulic hose and a preparation method thereof, wherein the ultrahigh pressure hydraulic hose comprises an inner layer rubber, a buffer layer, a winding layer, a middle rubber layer, an outer rubber layer and magnetic beads, when the inner layer rubber is bent under impact force, the buffer layer is bent along with the inner layer rubber, the gap between the ripples of the buffer layer at the bending part is increased, the magnetic beads move to the side with large gap under the combined action of extrusion force and attraction force, and gather at the ripple gap to form a similar reinforcing block structure, the strength compensation is carried out on the stressed position of the position where the inner layer glue is impacted, and by arranging the magnetic flux detector, when the inner wall of the inner layer glue has cracks, the magnetic beads run off, the magnetic flux changes, the hose is detected by the magnetic flux detector, and when the magnetic flux detected at the position is smaller than a set magnetic flux threshold value, a worker is reminded of timely replacement, so that danger is avoided.

Description

Ultrahigh-pressure hydraulic hose and preparation method thereof
Technical Field
The invention relates to an ultrahigh pressure hydraulic hose and a preparation method thereof, belonging to the technical field of rubber hoses.
Background
The hydraulic hose is a type superior to a common hose in performance and action, and mainly comprises an inner rubber layer, a middle rubber layer and a plurality of circles of steel wires which are wound, wherein the inner rubber layer plays a role of enabling a conveyed medium to bear certain pressure and simultaneously enabling the steel wires not to be corroded, the outer rubber layer is used for enabling the steel wires not to be damaged by other types, and the inner steel wire layer and the middle rubber layer are skillfully matched to play a certain reinforcing role as a framework material. The hydraulic hose can not only utilize hydraulic power to convey media such as water, gas and the like, but also can convey high-pressure media such as oil and the like, and is widely applied to the industries of petroleum, chemical engineering, coal, mining industry, automobiles and engineering machinery.
Application number 201921262996.8 provides a flexible superhigh pressure fluid connection anti-pulse rubber hose, has improved the bonding effect of rubber hose inner structure, has increased rubber hose's compliance, has improved its impulse performance and heat resistance and acid and alkali-resistance anticorrosion effect, but this rubber hose does not optimize the antistatic properties.
The patent with the application number of 201810299922.5 provides a high-strength, ageing-resistant, high-pulse-resistance and flame-retardant hydraulic rubber tube, improves the product quality of a steel wire wound hydraulic rubber tube, increases the pulse times of the product in the using process, avoids the phenomena of pinholes and liquid leakage in the using process, and does not have corresponding compensation measures when strong impact force occurs on the hydraulic rubber tube.
Disclosure of Invention
The invention aims to provide an ultrahigh pressure hydraulic hose, when the hose is impacted by a medium with certain pressure, the hose is bent, the ripple gap of a buffer layer is increased, magnetic beads move to the side with the increased gap, the strength compensation is carried out on an inner rubber layer at the bent part, the impact resistance of the hose after the hose is impacted by the pressure medium is improved, and meanwhile, a conductive substance is added into the inner rubber layer, so that the charge accumulation of the inner rubber layer is effectively prevented, the charge transfer is carried out in time, and the use safety of the hose is improved.
The technical scheme for solving the problems is as follows:
the invention provides an ultrahigh pressure hydraulic hose, which comprises an inner rubber layer, a buffer layer, winding layers, a middle rubber layer and an outer rubber layer which are sequentially arranged from inside to outside, wherein the buffer layer is corrugated and is filled with a plurality of magnetic beads, and the winding directions of steel wires of every two adjacent winding layers are opposite;
when the hose is bent, with the buffer layer that interior glue film links to each other takes place to be crooked, clearance grow between the one side ripple of interior glue film is kept away from to the buffer layer, the magnetic bead is to the big position gathering in ripple clearance, reinforcing compressive property.
As a preferred technical scheme of the invention, the inner rubber layer is prepared from the following raw materials:
50-60 parts of styrene-butadiene rubber
55-65 parts of nitrile rubber
4-6 parts of zinc oxide
2-3 parts of softening plasticizer
2-3 parts of adhesive
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter
20-25 parts of acrylonitrile-styrene-acrylate copolymer
Stearic acid 3-5 parts
2-5 parts of absolute ethyl alcohol
1-2 parts of dispersant
3-8 parts of graphene.
As a preferable technical scheme of the invention, the buffer layer is prepared from the following raw materials:
70-80 parts of natural rubber
3-6 parts of ferroferric oxide
3-5 parts of zinc oxide
Stearic acid 3-5 parts
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter.
As a preferred technical scheme of the invention, the outer adhesive layer is prepared from the following raw materials:
45-50 parts of nitrile rubber
45-55 parts of butadiene rubber
35-45 parts of polyurethane rubber
40-50 parts of polyvinyl chloride
2-3 parts of adhesive
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter
1-2 parts of dispersant
3-10 parts of carbon black.
As a preferred technical scheme of the invention, the preparation method of the ultrahigh pressure hydraulic hose is applied to the ultrahigh pressure hydraulic hose and comprises the following steps:
s1: mixing and refining the inner rubber layer, the buffer layer and the outer rubber layer by a mixing roll according to the formula;
s2: the outer wall of the inner layer adhesive is coated with a buffer layer, the buffer layer is magnetic, and a plurality of magnetic beads are adsorbed on the surface of the buffer layer;
s3: steel wire winding is carried out along the outer wall of the buffer layer to form a winding layer, and the magnetic beads are positioned between the buffer layer and the winding layer;
s4: gluing to fix the winding layer, coating a middle glue layer on the outer side of the winding layer, wherein the winding layer and the middle glue layer are both provided with a plurality of layers, and the winding layer and the middle glue layer are alternately arranged;
s5: coating an outer adhesive layer on the outer side of the winding layer;
s6: winding a vulcanization protective layer, vulcanizing in a vulcanizing tank, removing the vulcanization protective layer, and removing the core to obtain the high-pressure hydraulic hose.
As a preferable technical scheme of the invention, the preparation of the inner glue layer comprises the following steps:
s1: dissolving stearic acid in absolute ethyl alcohol, adding graphene, stirring uniformly, adding a dispersing agent into the absolute ethyl alcohol to prepare a mixed solution, mixing the prepared graphene mixed solution with the dispersing agent mixed solution, and stirring uniformly to obtain a graphene compound solution;
s2: pouring styrene butadiene rubber and nitrile butadiene rubber into a high-speed mixer, stirring for 5-8min, adding the graphene compound liquid prepared in the step S1, mixing for 5min, adding acrylonitrile-styrene-acrylate copolymer, and mixing for 5 min;
s3: sequentially adding zinc oxide, softening plasticizer, adhesive, anti-aging agent, activity promoter and vulcanizing agent, stirring for 25min, and discharging the mixed rubber;
s4: and (4) placing the discharged mixed rubber material on an open mill, cooling, and extruding for forming.
As a preferred technical solution of the present invention, the preparation of the buffer layer includes the following steps:
s1: sequentially adding stearic acid, zinc oxide, an anti-aging agent and ferroferric oxide into natural rubber, and mixing for 30 min;
s2: after mixing uniformly, adding an accelerant and a vulcanizing agent into a mud conveying pipe of an open mill, and thinly passing through a sheet;
s3: and (3) placing the rubber compound in a magnetizing instrument, magnetizing, and taking out for vulcanization.
As a preferred technical scheme of the present invention, the preparation of the outer adhesive layer comprises the following steps:
s1: mixing nitrile rubber, butadiene rubber and polyurethane rubber in an internal mixer for 6 min;
s2: sequentially adding carbon black, a dispersing agent, a binder, an anti-aging agent, an activity promoter and a vulcanizing agent into the rubber compound obtained in the step S1;
s3: discharging the mixed rubber material, placing the discharged mixed rubber material on an open mill, cooling and extruding.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, by arranging the inner layer rubber, the buffer layer, the winding layer, the middle rubber layer, the outer rubber layer and the magnetic beads, when a medium with certain pressure is conveyed in the hose, the inner wall of the inner layer rubber is impacted to bend, the buffer layer is bent along with the inner wall of the inner layer rubber, gaps among corrugations of the buffer layer at the bending part are increased, the magnetic beads move to one side with large gaps under the combined action of extrusion force and attraction force, and are gathered at the corrugated gaps to form a similar reinforcing block structure, so that the strength compensation is carried out on the stressed part of the inner layer rubber at the impact position.
2. According to the hose, the magnetic buffer layer, the magnetic beads and the magnetic flux detector are arranged, when cracks occur on the inner wall of the inner-layer rubber, the magnetic beads are lost, the magnetic flux at the position is changed, a worker uses the magnetic flux detector to detect the hose, when the fact that the magnetic flux at the position is smaller than a set magnetic flux threshold value is detected, the worker is reminded to replace the hose in time, danger is avoided, and the situation in the hose is detected by the change of the magnetic flux.
Drawings
FIG. 1 is a schematic sectional view of the hose of the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic diagram of the distribution of magnetic beads when the buffer layer is bent according to the present invention.
In the figure: 1. an inner glue layer; 2. a buffer layer; 3. a winding layer; 4. a middle glue layer; 5. an outer adhesive layer; 6. magnetic beads.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The ultrahigh pressure hydraulic hose comprises an inner rubber layer 1, a buffer layer 2, a winding layer 3, a middle rubber layer 4 and an outer rubber layer 5 which are sequentially arranged from inside to outside, wherein the winding layer 3 and the middle rubber layer 4 are both provided with multiple layers, the winding layer 3 and the middle rubber layer 4 are alternately arranged, the buffer layer 2 is corrugated and is filled with a plurality of magnetic beads 6, and the winding direction of each adjacent winding layer steel wire is opposite.
The preparation method of the ultrahigh-pressure hydraulic hose comprises the following steps:
s1: mixing the inner layer rubber 1, the buffer layer 2 and the outer rubber layer 5 by a mixing roll according to the formula;
s2: the outer wall of the inner layer adhesive 1 is coated with a buffer layer 2, the buffer layer 2 is magnetic, and a plurality of magnetic beads 6 are adsorbed on the surface of the buffer layer 2;
s3: steel wire winding is carried out along the outer wall of the buffer layer 2 to form a winding layer 3, and the magnetic beads 6 are positioned between the buffer layer 2 and the winding layer 3;
s4: gluing to fix the winding layer 3, coating the middle glue layer 4 on the outer side of the winding layer 3, wherein the winding layer 3 and the middle glue layer 4 are both provided with multiple layers, and the winding layer 3 and the middle glue layer 4 are alternately arranged;
s5: the outer side of the winding layer 3 is coated with an outer rubber layer 5;
s6: winding a vulcanization protective layer, vulcanizing in a vulcanizing tank, removing the vulcanization protective layer, and removing the core to obtain the high-pressure hydraulic hose.
Wherein, when the hose is crooked, the buffer layer 2 that links to each other with interior glue film 1 takes place to be crooked, and clearance grow between one side ripple that interior glue film 1 was kept away from to buffer layer 2, and magnetic bead 6 is to the big position gathering in ripple clearance, reinforcing compressive property, and is concrete, and the hose is when receiving liquid impact, and deformation takes place for interior glue film 1, and buffer layer 2 that links to each other with interior glue film 1 takes place to be crooked, and clearance grow between one side ripple that interior glue film 1 was kept away from to buffer layer 2, and magnetic bead 6 gets into the ripple clearance.
The buffer layer 2 of the hose is prepared from the following raw materials:
70-80 parts of natural rubber
3-6 parts of ferroferric oxide
3-5 parts of zinc oxide
Stearic acid 3-5 parts
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter.
Wherein, the preparation of the buffer layer 2 comprises the following steps:
s1: sequentially adding stearic acid, zinc oxide, an anti-aging agent and ferroferric oxide into natural rubber, and mixing for 30 min;
s2: after mixing uniformly, adding an accelerant and a vulcanizing agent into a mud conveying pipe of an open mill, and thinly passing through a sheet;
s3: and (3) placing the rubber compound in a magnetizing instrument, magnetizing, and taking out for vulcanization.
When a medium with certain pressure is conveyed in a hose, the medium with certain pressure impacts the inner wall of the hose, the inner wall of the hose is broken after being impacted for a long time, in order to relieve the impact of the pressure medium on the inner wall of the hose, the outer wall of an inner rubber layer 1 is coated with a buffer layer 2, the outer side of the buffer layer 2 is corrugated, the buffer layer 2 contains a magnetic substance ferroferric oxide, in the preparation process, after the mixture is uniformly mixed, the mixed rubber mixed with the ferroferric oxide is placed in a magnetizer for magnetization, a magnetic buffer layer 2 is prepared, a plurality of magnetic beads 6 are adsorbed on the surface of the buffer layer 2, when the inner wall of the hose is impacted by the pressure medium, the inner rubber layer 1 of the hose is deformed, the buffer layer 2 adjacent to the inner rubber layer 1 is deformed accordingly, as shown in figure 2, the buffer layer 2 is bent under the impact force at the position on the buffer layer 2, the larger the impact force is, the larger the bending degree is, because the outer side of the buffer layer 2 is corrugated, the corrugated space of the bent position of the buffer layer 2 is increased, the larger the impact force is, the larger the space between the corrugations is, while the corrugated space is increased, on one hand, the inner part of the corrugated space generates attraction force to the magnetic beads 6 to promote more magnetic beads 6 to enter the gap, on the other hand, the buffer layer 2 is bent, the winding layer positioned at the outer side of the buffer layer generates pressure to the buffer layer 2 to force more magnetic beads 6 to enter the corrugated gap, on the other hand, one side of the buffer layer 2 is bent, the gap is increased, the gap at the opposite side is relatively reduced, on the one hand, the magnetic beads 6 in the opposite side move towards the direction with the larger gap under the action of the extrusion force, on the other hand, because the magnetic beads 6 are mutually attracted, a part of the magnetic beads 6 are driven to move towards the side with the larger gap under the action of the attraction force, after a plurality of the magnetic beads 6 are filled in the corrugated gap, because the hardness of the magnetic beads 6 is high, the magnetic beads 6 gathered at the positions of the ripple gaps form a similar reinforcing block structure, the strength compensation is carried out on the stress position of the impact position of the inner layer rubber 1, the strength of the buffer layer 2 is increased, so that the position of the corresponding inner layer rubber 1 has high strength to bear the impact of a pressure medium, the phenomenon that the pressure medium impact force is too high and the inner layer rubber 1 bends too much to form cracks is avoided, when no impact force exists on the inner wall of the inner layer rubber 1, the inner layer rubber 1 recovers deformation, the buffer layer 2 connected with the inner layer rubber 1 recovers along with the deformation, the gaps between the buffer layers 2 recover, the magnetic beads 6 gathered at the bending positions move towards two sides under the action of extrusion force, when the buffer layer 2 bends and recovers, the opposite sides where the magnetic beads bend occurs, namely the gaps between the ripples in the extrusion state increase, so that the magnetic beads 6 move towards the opposite sides to recover the initial state, since the magnetic beads 6 are distributed throughout the hose, no matter which part of the hose is impacted when the liquid is conveyed in the hose, the magnetic beads 6 can be adaptively changed according to the impacted position, so that each part of the hose has resistance to the impact of the pressure medium.
The hydraulic hose can generate cracks in the hydraulic hose after being used for a long time, the cracks are gradually increased along with the continuous impact of high-pressure liquid, once the cracks extend to the outer rubber layer 5 of the hydraulic hose, the high-pressure liquid can be sprayed out of the hose under a larger pressure to hurt workers, according to the invention, the magnetic beads 6 are filled in the buffer layer 2, when the cracks appear on the inner rubber layer 1, the magnetic beads 6 at the cracks are lost, the magnetic flux is reduced, the magnetic flux detected by the magnetic flux detector is smaller than a set magnetic flux threshold, if the cracks appear on the inner rubber layer 1 and the buffer layer 2, the magnetic beads 6 at the position are lost, the magnetic flux at the position is changed, the hose is periodically detected by the magnetic flux detector, if the magnetic flux at the position is detected to be smaller than the set magnetic flux threshold, wherein the magnetic flux threshold is set as the minimum magnetic flux in a normal state, the magnetic beads 6 at the position are lost, the crack appears in this department of proving promptly, reminds the staff in time to change, avoids taking place danger.
According to the invention, the magnetic beads 6 are utilized to compensate the strength of the bent part of the hose on one hand, so that the strength of the bent part is improved; on the other hand, the change of magnetic flux generated by the reduction of the number of the magnetic beads 6 caused by the cracks of the buffer layer 2 of the hydraulic hose is realized, whether cracks occur in the hose is detected and early warned, and the safety of the hose during the use is ensured.
In the rolling process, in the prior art, frequent bending increases the probability of cracks appearing on the hose, this is because the rubber itself will be largely bent during the reciprocal rolling process, the stress is relatively concentrated, in the repeated extrusion process, the rubber part is easy to break the bond, the toughness is reduced, and the brittleness is enhanced, when the hose is wound, due to the existence of the magnetic beads 6, on one hand, when the buffer layer 2 is bent, the magnetic beads 6 enter the positions with larger gaps of the buffer layer 2, on the other hand, the corrugation gaps at the opposite sides where the bending occurs are reduced, the stress is relatively concentrated, in the presence of the magnetic beads 6, because the magnetic beads 6 have a certain radian and cannot deform along with excessive rubber deformation, the rubber can be prevented from being bent to an excessive degree and the stress at the bent part is prevented from being excessively concentrated, reduce the too big harm that causes of extrusion degree to rubber, further improve the life of hose.
The inner rubber layer 1 of the hose is prepared from the following raw materials:
50-60 parts of styrene-butadiene rubber
55-65 parts of nitrile rubber
4-6 parts of zinc oxide
2-3 parts of softening plasticizer
2-3 parts of adhesive
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter
20-25 parts of acrylonitrile-styrene-acrylate copolymer
Stearic acid 3-5 parts
2-5 parts of absolute ethyl alcohol
1-2 parts of dispersant
3-8 parts of graphene.
Wherein, the preparation of the inner glue layer 1 comprises the following steps:
s1: dissolving stearic acid in absolute ethyl alcohol, adding graphene, stirring uniformly, adding a coupling agent into the absolute ethyl alcohol to prepare a mixed solution, mixing the prepared graphene mixed solution and the coupling agent mixed solution, and stirring uniformly to obtain a graphene compound solution;
s2: pouring styrene butadiene rubber and nitrile butadiene rubber into a high-speed mixer, stirring for 5-8min, adding the graphene compound liquid prepared in the step S1, mixing for 5min, adding acrylonitrile-styrene-acrylate copolymer, and mixing for 5 min;
s3: sequentially adding zinc oxide, softening plasticizer, adhesive, anti-aging agent, activity promoter and vulcanizing agent, stirring for 25min, and discharging the mixed rubber;
s4: and (4) placing the discharged mixed rubber material on an open mill, cooling, and extruding for forming.
The inner layer rubber 1 of the hose is directly contacted with a medium with pressure, the impact force is the largest, therefore, the inner layer rubber 1 has good corrosion resistance and impact resistance, on the other hand, in the process of medium flowing, because the electron attraction of the atom core to the outermost layer is not enough, the medium flowing and the inner wall of the hose generate friction, and lose part of electrons under the action of friction, because the insulating property of the inner wall of the hose is better, the charges can not be lost and can be gathered, a large amount of gathered charges generate higher voltage, when the potential difference is larger, spark discharge can occur, so that larger danger hidden danger is caused, in order to lead out the charges in time, the acrylonitrile-styrene-acrylate copolymer is added, the added acrylonitrile-styrene-acrylate copolymer is mixed with mixed rubber of butadiene styrene rubber and nitrile rubber, because the motion capability of a high molecular chain is stronger, the preparation method comprises the steps of dissolving stearic acid in absolute ethyl alcohol, adding graphene, stirring uniformly, preparing a dispersant mixed solution, uniformly mixing the dispersant mixed solution with the graphene mixed solution to form a graphene compound solution, adding the graphene compound solution into mixed glue, and adding the dispersant to improve the interface performance of rubber and graphene, reduce the viscosity of a rubber melt, improve the dispersion degree of graphene, improve the dispersion of graphene and prevent the agglomeration of graphene.
Test example 1
The resistance test was performed on the inner layer rubber 1 of the ultrahigh-pressure hydraulic hose prepared in the present invention.
Example 1
The experimental steps are as follows:
s1: dissolving 3-5 parts of stearic acid in absolute ethyl alcohol, adding 3 parts of graphene, uniformly stirring, adding 1-2 parts of a dispersing agent into the absolute ethyl alcohol to prepare a mixed solution, mixing the prepared graphene mixed solution with the dispersing agent mixed solution, and uniformly stirring to obtain a graphene compound solution;
s2: pouring 50-60 parts of styrene butadiene rubber and 55-65 parts of nitrile butadiene rubber into a high-speed mixer, stirring for 5-8min, adding the graphene compound liquid prepared in the step S1, mixing for 5min, adding 20-25 parts of acrylonitrile-styrene-acrylate copolymer, and mixing for 5 min;
s3: sequentially adding 4-6 parts of zinc oxide, 2-3 parts of softening plasticizer, 2-3 parts of adhesive, 1-2 parts of anti-aging agent, 0.5-1.5 parts of activity promoter and 1-2 parts of vulcanizing agent, stirring for 25min, and discharging mixed rubber;
s4: and (4) placing the discharged mixed rubber material on an open mill, cooling, and extruding for forming.
Example 2
The experimental steps are as follows: the graphene added in the experimental step S1 in example 1 was replaced with 5 parts, and the rest of the steps and the amount were the same as in example 1.
Example 3
The experimental steps are as follows: the graphene added in the experimental step S1 in example 1 was replaced with 8 parts, and the rest of the steps and the amount were the same as in example 1.
Resistance tests were performed on the ultrahigh-pressure hydraulic hoses with different graphene contents prepared in examples 1 to 3 of the present invention using a digital electrometer, and the results are shown in table 1.
TABLE 1
Group of Flexible pipe resistance (omega)
Example 1 505
Example 2 106
Example 3 223
It can be seen from the experimental results that the resistance of the hose prepared in example 2 is the smallest, which indicates that the graphene is dispersed more uniformly in example 2 to form a conductive network and can dredge charges in time, and the resistance of the hose prepared in example 1 is greater than that of the hose prepared in example 2, at this time, since the content of the graphene in example 1 is less, it further indicates that the graphene has good conductivity, but the resistance of the hose becomes larger instead with the increase of the content of the graphene (example 3), which indicates that the graphene is agglomerated in the mixed glue after adding excessive graphene, and is not completely dispersed, and the large amount of agglomerated graphene is not dispersed uniformly and can not effectively reduce the resistance of the mixed glue and can not transfer charges in time.
The outer rubber layer 5 of the hose is prepared from the following raw materials:
45-50 parts of nitrile rubber
45-55 parts of butadiene rubber
35-45 parts of polyurethane rubber
40-50 parts of polyvinyl chloride
2-3 parts of adhesive
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter
1-2 parts of dispersant
3-10 parts of carbon black.
Wherein, the preparation of the outer glue layer 5 comprises the following steps:
s1: mixing nitrile rubber, butadiene rubber and polyurethane rubber in an internal mixer for 6 min;
s2: sequentially adding carbon black, a dispersing agent, a binder, an anti-aging agent, an activity promoter and a vulcanizing agent into the rubber compound obtained in the step S1;
s3: discharging the mixed rubber material, placing the discharged mixed rubber material on an open mill, cooling and extruding.
Test example 2
The outer rubber layer of the ultrahigh-pressure hydraulic hose prepared by the invention is subjected to material performance test.
Example 4
The experimental steps are as follows:
s1: mixing 45-50 parts of nitrile rubber, 45-55 parts of butadiene rubber and 35-45 parts of polyurethane rubber in an internal mixer for 6 min;
s2: adding 3 parts of carbon black, 1-2 parts of dispersing agent, 2-3 parts of adhesive, 1-2 parts of anti-aging agent, 0.5-1.5 parts of activity promoter and 1-2 parts of vulcanizing agent into the rubber compound obtained in the step S1 in sequence;
s3: discharging the mixed rubber material, placing the discharged mixed rubber material on an open mill, cooling and extruding.
Example 5
The experimental steps are as follows: the carbon black charged in the experimental step S2 in example 4 was replaced with 6 parts, and the same amount as in example 4 was used for the remaining steps.
Example 6
The experimental steps are as follows: the carbon black charged in the experimental step S2 in example 4 was replaced with 10 parts, and the same amount as in example 4 was used for the remaining steps.
Comparative example 1
The experimental steps are as follows:
s1: mixing 45-50 parts of nitrile rubber, 45-55 parts of butadiene rubber and 35-45 parts of polyurethane rubber in an internal mixer for 6 min;
s2: sequentially adding 2-3 parts of adhesive, 1-2 parts of anti-aging agent, 0.5-1.5 parts of activity promoter and 1-2 parts of vulcanizing agent into the rubber compound obtained in the step S1;
s3: discharging the mixed rubber material, placing the discharged mixed rubber material on an open mill, cooling and extruding.
The ultrahigh pressure hydraulic hoses of different carbon black contents prepared in examples 4 to 6 of the present invention and comparative example 1 were subjected to material property tests, and the results are shown in table 2.
TABLE 2
Group of Hardness (HD) Tear Strength (KN. m)-1)
Example 4 77.5 80
Example 5 82 90
Example 6 72.5 83
Comparative example 1 65 65
It can be seen from table 2 that after the carbon black is added, the hardness and tear strength of the prepared outer rubber 5 are improved, and the comparison shows that the performance of the outer rubber 5 prepared in example 5 is the best, which indicates that the carbon black and rubber molecules are combined with each other in the process of mixing and vulcanizing the carbon black with the nitrile rubber, the butadiene rubber and the polyurethane rubber, so that the binding force between the rubber molecules is enhanced, and the reinforcing effect is achieved; aiming at the tear strength, the comparison shows that the tear strength is increased and then reduced along with the increase of the addition amount of the carbon black, probably because the excessive carbon black cannot be uniformly dispersed in the mixed rubber, the particle size of the whole agglomeration system is increased, the interaction with a rubber matrix is weakened, and when the carbon black is subjected to the stretching action, the carbon black is agglomerated to easily form a stress concentration point to initiate the generation of cracks, so that the tear strength is finally reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. An ultrahigh pressure hydraulic hose characterized in that: the steel wire winding device comprises an inner rubber layer (1), a buffer layer (2), a winding layer (3), a middle rubber layer (4) and an outer rubber layer (5) which are sequentially arranged from inside to outside, wherein the buffer layer (2) is corrugated and is filled with a plurality of magnetic beads (6), and the winding directions of steel wires of every two adjacent winding layers are opposite;
when the hose is bent, the buffer layer (2) connected with the inner rubber layer (1) is bent, gaps among corrugations on one side, far away from the inner rubber layer (1), of the buffer layer (2) are enlarged, and the magnetic beads (6) are gathered to positions with large corrugated gaps, so that the compression resistance is enhanced;
the buffer layer (2) is prepared from the following raw materials:
70-80 parts of natural rubber
3-6 parts of ferroferric oxide
3-5 parts of zinc oxide
Stearic acid 3-5 parts
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter.
2. An ultrahigh-pressure hydraulic hose according to claim 1, wherein: the inner rubber layer (1) is prepared from the following raw materials:
50-60 parts of styrene-butadiene rubber
55-65 parts of nitrile rubber
4-6 parts of zinc oxide
2-3 parts of softening plasticizer
2-3 parts of adhesive
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter
20-25 parts of acrylonitrile-styrene-acrylate copolymer
Stearic acid 3-5 parts
2-5 parts of absolute ethyl alcohol
1-2 parts of dispersant
3-8 parts of graphene.
3. An ultrahigh-pressure hydraulic hose according to claim 1, wherein: the outer rubber layer (5) is prepared from the following raw materials:
45-50 parts of nitrile rubber
45-55 parts of butadiene rubber
35-45 parts of polyurethane rubber
40-50 parts of polyvinyl chloride
2-3 parts of adhesive
1-2 parts of anti-aging agent
1-2 parts of vulcanizing agent
0.5-1.5 parts of activity promoter
1-2 parts of dispersant
3-10 parts of carbon black.
4. A method of manufacturing an ultrahigh pressure hydraulic hose according to any one of claims 1 to 3, comprising the steps of:
s1: mixing and refining the inner rubber layer (1), the buffer layer (2) and the outer rubber layer (5) by a mixing roll according to the formula;
s2: the outer wall of the inner layer adhesive (1) is coated with a buffer layer (2), the buffer layer (2) is magnetic, and a plurality of magnetic beads (6) are adsorbed on the surface of the buffer layer (2);
s3: steel wires are wound along the outer wall of the buffer layer (2) to form a winding layer (3), and the magnetic beads (6) are positioned between the buffer layer (2) and the winding layer (3);
s4: gluing to fix the winding layer (3), coating the middle glue layer (4) on the outer side of the winding layer (3), wherein multiple layers of the winding layer (3) and the middle glue layer (4) are arranged, and the winding layer (3) and the middle glue layer (4) are alternately arranged;
s5: an outer rubber layer (5) is coated on the outer side of the winding layer (3);
s6: winding a vulcanization protective layer, vulcanizing in a vulcanizing tank, removing the vulcanization protective layer, and removing the core to obtain the high-pressure hydraulic hose.
5. The method for manufacturing an ultrahigh-pressure hydraulic hose according to claim 4, wherein the method comprises the following steps: the preparation of the inner glue layer (1) comprises the following steps:
s1: dissolving stearic acid in absolute ethyl alcohol, adding graphene, stirring uniformly, adding a dispersing agent into the absolute ethyl alcohol to prepare a mixed solution, mixing the prepared graphene mixed solution with the dispersing agent mixed solution, and stirring uniformly to obtain a graphene compound solution;
s2: pouring styrene butadiene rubber and nitrile butadiene rubber into a high-speed mixer, stirring for 5-8min, adding the graphene compound liquid prepared in the step S1, mixing for 5min, adding acrylonitrile-styrene-acrylate copolymer, and mixing for 5 min;
s3: sequentially adding zinc oxide, softening plasticizer, adhesive, anti-aging agent, activity promoter and vulcanizing agent, stirring for 25min, and discharging the mixed rubber;
s4: and (4) placing the discharged mixed rubber material on an open mill, cooling, and extruding for forming.
6. The method for manufacturing an ultrahigh-pressure hydraulic hose according to claim 4, wherein the method comprises the following steps: the preparation of the buffer layer (2) comprises the following steps:
s1: sequentially adding stearic acid, zinc oxide, an anti-aging agent and ferroferric oxide into natural rubber, and mixing for 30 min;
s2: after mixing uniformly, adding an accelerant and a vulcanizing agent into a mud conveying pipe of an open mill, and thinly passing through a sheet;
s3: and (3) placing the rubber compound in a magnetizing instrument, magnetizing, and taking out for vulcanization.
7. The method for manufacturing an ultrahigh-pressure hydraulic hose according to claim 4, wherein the method comprises the following steps: the preparation of the outer glue layer (6) comprises the following steps:
s1: mixing nitrile rubber, butadiene rubber and polyurethane rubber in an internal mixer for 6 min;
s2: sequentially adding carbon black, a dispersing agent, a binder, an anti-aging agent, an activity promoter and a vulcanizing agent into the rubber compound obtained in the step S1;
s3: discharging the mixed rubber material, placing the discharged mixed rubber material on an open mill, cooling and extruding.
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