CN105840925B - A kind of controllable expansion oil field special-purpose fire-resistant sebific duct and preparation method thereof - Google Patents

A kind of controllable expansion oil field special-purpose fire-resistant sebific duct and preparation method thereof Download PDF

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Publication number
CN105840925B
CN105840925B CN201610272917.6A CN201610272917A CN105840925B CN 105840925 B CN105840925 B CN 105840925B CN 201610272917 A CN201610272917 A CN 201610272917A CN 105840925 B CN105840925 B CN 105840925B
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expansion
layer
inner tube
thermal insulation
mrow
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CN105840925A (en
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王凤岭
杨中甲
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Hebei Siberia Special Rubber Co Ltd
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Hebei Siberia Special Rubber Co Ltd
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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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/04—Protection of pipes or objects of similar shape against external or internal damage or wear against fire or other external sources of extreme heat
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/08—Means for preventing radiation, e.g. with metal foil

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Thermal Insulation (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention discloses a kind of controllable expansion oil field special-purpose fire-resistant sebific duct and preparation method thereof, belong to composite and its preparing technical field.The present invention is by being sequentially prepared expansion thermal insulation layer, grid enhancement layer and flame protection layer in the outer surface of rubber inner tube, obtain controllable expansion oil field special-purpose fire-resistant sebific duct, the preparation method high efficiency, low cost, technique are simple, can be mass, the sebific duct possesses efficient thermal protection, controllable expansion performance, it is heat-insulated during in low temperature not expand, expanded during in high temperature and heat-insulated, with excellent controllable expansion performance and heat-proof quality, product reliability is good, service life was expected to improve to half a year, can be applied to petroleum industry well.

Description

A kind of controllable expansion oil field special-purpose fire-resistant sebific duct and preparation method thereof
Technical field
The invention belongs to composite and its preparing technical field, it is related to one kind and possesses controllable expansion fire resistance and efficiently The composite construction rubber oil hose of thermal protective performance.Specifically, a kind of controllable expansion oil field special-purpose fire-resistant sebific duct and its system are referred to Preparation Method.
Background technology
There is the hydraulic rubber oil tube used under the hot environment of thermal source or infrared source in the well control operation of oil field, have excellent Oil resistant, it is pressure-resistant, resistance to circumnutate, endurance the advantages that, but due to rubber heat resisting temperature be less than 200 DEG C, in hot environment In use, easy degradation and decomposition, causes the failure of pipeline rupture and hydraulic system, it is necessary to often change in (600~1200 DEG C) Oil pipe, service life is typically at 1~2 day.This not only increases the operation expense of hydraulic system, reduces production efficiency, And add the hidden danger in terms of the safety such as fire, contamination of products and production.
Therefore, it is necessary to improve fire-retardant, the heat resistance of rubber tube, existing application technology mainly has：(1) high pressure steel wire is wound Sebific duct is matrix, and crust coats flame-retardant coating layer, steel wire braid and flame-retardant layer；(2) on the set of the outer surface of original rubber tube The compound silastic-layer of glass fibre；(3) based on high pressure spiral rubber hose, outer layer glue uses fire-resistant rubber, additional thermal insulation layer And stainless steel mesh grid.Above method can improve the service life of oil pipe to a certain extent, but fire resisting effect is difficult to meet The needs of severe rugged environment and long-term use of requirement main cause have：(1) rubber oil hose of additional flame-retardant layer, flame-retardant layer have resistance to Fire action, but thermal conductivity is higher, effect of heat insulation is bad, and heat passes to rubber inner tube by top layer, causes rubber inner tube to fail； (2) in the additional refractory sleeve of sebific duct, by taking silicon rubber refractory sleeve as an example, casing thickness is certain and not may expand, and resistance to fire action is bright Aobvious, effect of heat insulation is limited；(3) the third above-mentioned scheme, not only can be with fire resisting but also can be with heat-insulated, but fire-resistant rubber price is high, leads Cause cost increase；(4) need to change whole rubber tube after the failure of anti-flaming thermal-insulation layer in the body of fire resisting sebific duct, not only influence production, And add the maintenance cost of equipment.
So for above Railway Project, from heat transfer principle, design and prepare with efficient thermal protection, controllable The inexpensive composite construction of expandable flame retardant performance is the key for improving hydraulic oil pipe high temperature resistant environment service life.
The content of the invention
Possess that high efficiency, low cost, technique are simple, possessing efficiently of can be mass it is an object of the invention to provide a kind of Thermal protection, the composite construction oil field special-purpose fire-resistant rubber oil hose of controllable expansion performance, described rubber oil hose abbreviation sebific duct.
The present invention provides a kind of controllable expansion oil field special-purpose fire-resistant sebific duct for possessing efficient thermal protection structure and its preparation side Method, the preparation method comprise the following steps：
The first step, the preparation of rubber inner tube；The rubber inner tube is used for transmitting the oily substances such as oil.
Second step, expansion thermal insulation layer is prepared outside rubber inner tube；Described expansion thermal insulation layer is coated on by extrusion way The outer surface of rubber inner tube, in hot environment, expansion thermal insulation layer is expanded to the loose foam knot of internal porous by compact texture Structure, general temperature start to expand higher than 200 DEG C, play excellent heat-blocking action.
3rd step, winding or cladding grid enhancement layer outside expansion thermal insulation layer；Described grid enhancement layer is one layer of fiber Grid cloth, expansion thermal insulation layer is strengthened.
4th step, flame protection layer is prepared outside grid enhancement layer, obtain controllable expansion oil field special-purpose fire-resistant sebific duct.
The flame protection layer is one in glass fabric, glass mat, basalt fiber cloth, basalt fibre felt The composite construction of kind or several infiltration flame-retardant phenolic resins, is adhered to grid enhancing layer surface, and main function is resistant to high warm The erosion of stream, protect the structural integrity of internal expansion thermal insulation layer and grid enhancement layer.
The controllable expansion oil field special-purpose fire-resistant sebific duct gross thickness 5.5mm~25.0mm, rubber inner tube outer surface is made successively Standby expansion thermal insulation layer, grid enhancement layer and flame protection layer, wherein rubber inner tube internal diameter 4.0mm~100.0mm, wall thickness 4.0mm ~15.00mm；The expansion insulation thickness 0.5mm~5mm, grid enhancement layer 0.5~1.0mm of thickness, flame protection thickness Spend for 0.5~5.0mm.
The advantage of the invention is that：
(1) present invention introducing expanding material system in thermal insulation layer expand, it is heat-insulated during in low temperature not expand, in high temperature Expanded when (more than 200 DEG C) and heat-insulated, there is excellent controllable expansion performance and heat-proof quality.
(2) present invention is strengthened using fiberglass gridding cloth or basalt fibre grid cloth, prevented in grid enhancement layer Expand thermal insulation layer caused by sebific duct is bent and crush and come off, and the presence of grid enhancement layer does not influence to expand the swollen of thermal insulation layer It is swollen.
(3) present invention is used using flame-retardant phenolic resin as matrix, with glass fabric, glass fibers in flame protection layer Tie up felt, basalt fiber cloth, the flame protection composite construction that basalt fibre felt is reinforcement.Can effectively it be realized in hot environment To heat-flash air-flow and the stop of heat radiation, effectively protection expansion thermal insulation layer.
(4) present invention is used using flame-retardant phenolic resin as matrix in flame protection layer, with upright zigzag and lies down saw Tooth form folding glass fiber cloth or the flame protection composite construction that basalt fiber cloth is reinforcement.Pleated sheet is soaked into phenolic resin Solidification and phenolic resin is not soaked at folding feet position, have two big advantages：1) phenolic resin has been played in system with fiber cloth and cooperateed with Flame protection acts on, and can effectively realize the stop to heat-flash air-flow and heat radiation；2) folded fibre cloth expands inside by stretching Space, expansion space is provided for internal expansion thermal insulation layer expanded by heating.
(5) present invention can prepare the oil field special-purpose fire-resistant sebific duct for possessing controllable expansion performance in batches.
(6) rubber oil hose provided by the invention is in light weight, and thermal protection efficiency high, fire resistance are good, has excellent heat-insulated Performance, product reliability is good, and service life was expected to improve to half a year, can be applied to petroleum industry well.
Brief description of the drawings
Figure 1A is special-purpose fire-resistant sebific duct structural representation in controllable expansion oil field in the present invention；
Figure 1B is special-purpose fire-resistant sebific duct ribbon structure schematic diagram in controllable expansion oil field in the present invention；
Fig. 1 C are special-purpose fire-resistant sebific duct upright broached-tooth design schematic diagrames in controllable expansion oil field in the present invention；
Fig. 1 D are that controllable expansion oil field special-purpose fire-resistant sebific duct lies down broached-tooth design schematic diagram in the present invention；
Fig. 2 is the parcel schematic diagram that thermal insulation layer is expanded in the present invention；
Fig. 3 is the winding schematic diagram of grid enhancement layer in the present invention；
Fig. 4 is the structural representation of upright sawtooth pattern flame protection layer in the present invention；
Fig. 5 is the structural representation that zigzag flame protection layer is lieed down in the present invention；
Fig. 6 is outside drawing before and after the present invention is tested the calcination of controllable expansion anti-flaming thermal-insulation system product；
Fig. 7 is the present invention to controllable expansion anti-flaming thermal-insulation system product calcination test temperature time plot.
In figure：
1. rubber inner tube 2. expands the grid enhancement layer of thermal insulation layer 3.
4. the fiber cloth of flame protection layer 401. or the upright sawtooth fiber type flipe of fibrofelt band 402.
403. lie down zigzag fiber flipe
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate The present invention rather than limit the scope of the invention.In addition, it is to be understood that after the content that the present invention lectures is read, ability Field technique personnel can make various changes or modification to the present invention, and these equivalent form of values also belong to the application appended claims Book limited range.
The present invention provides a kind of preparation method of controllable expansion oil field special-purpose fire-resistant sebific duct, with reference to Figure 1A~1D, the system The step of Preparation Method, is as follows：
The first step, the preparation of rubber inner tube 1.
By mill, extruder and wrapping machine, rubber inner tube is prepared, rubber inner tube is divided into inner glue layer, enhancement layer and outer Glue-line, wherein inner glue layer are the rubber with oil resistant function, can be selected from nitrile rubber (heatproof is less than 125 DEG C), acrylate One or more in the rubber such as rubber (150-200 DEG C of heatproof), fluorubber (200-250 DEG C of heatproof)；Enhancement layer is braid, Including one or more of preparations in the fibers such as carbon fiber, glass fibre, basalt fibre, aramid fiber, wire or silk Braid；Outer glue-line is one layer of rubber cover, has good mechanical property, ageing-resistant, antifatigue, including epichlorohydrin rubber etc. Rubber, outer glue-line can be by extrusion moldings or Wrapping formed obtained, wherein 5~10cm of rubber bandwidth when Wrapping formed, is twined Be 30~60 ° around angle, winding tension by with enhancement layer it is close it is sturdy be defined, interlayer gap is bonded with epoxy adhesive.Addition Agent mainly has vulcanizing agent, accelerator, activator, age resistor and filler etc..
Second step, carry out expanding the preparation of thermal insulation layer 2 in the outer surface of rubber inner tube 1.
Using 1 percent balances weigh respectively phenolic resin, curing agent, 120~200 mesh fabric and raw-vermiculites, white carbon, 80~ 100 mesh hollow glass micropearls, azodicarbonamide parts by weight for 100 parts, 6 parts, 30~70 parts, 1~6 part, 1~4 part, 10 ~40 parts, 120~200 mesh fabric and raw-vermiculites, white carbon, 80~100 mesh hollow glass micropearls, azodicarbonamide are then passed through into machine Tool stirs and evenly mixs, as filler.Stirred after adding filler in phenolic resin, mixing speed is 200~1500r/min, stirring Time is 3~15min, after mechanical agitation mixes, adds curing agent and is stirred with 200~1500r/min speed, mixing time Mixed for 3~15min, obtain expanding heat-insulated coating.Described curing agent is typically from p-methyl benzenesulfonic acid, benzene sulfonic acid, oil Any one in sodium sulfonate, phosphoric acid or phenolsulfonic acid.
The heat-insulated coating of expansion that will be prepared with extruder is coated to the outer surface of rubber inner tube 1, obtains expanding heat-insulated Layer 2.Expansion 0.5~the 5mm of thickness of thermal insulation layer 2, the expansion thickness of thermal insulation layer 2 can be determined using needs according to environment.
3rd step, in the expansion outer cladding grid enhancement layer 3 of thermal insulation layer 2.
Fibrous mesh cloth is wound or be coated to expansion thermal insulation layer 2 outer surface, is then placed into solidifying at a temperature of 60 DEG C 360min, form grid enhancement layer 3.
Preferably, overlapping 10.0mm or so when described fibrous mesh cloth winds or coated.The mesh of fibrous mesh cloth enhancing Be to prevent from causing when rubber tube from bending expanding the rupture of thermal insulation layer 2 coming off.
Described fibrous mesh cloth is selected from fiberglass gridding cloth, basalt fibre grid cloth, carbon fiber mesh fabric, aramid fiber One or more of fibrous mesh cloths in fibrous mesh cloth, recommend under hot environment (more than 200 DEG C) to use fiberglass gridding Cloth or basalt fibre grid cloth.Mesh length of side 5mm~20mm of the fibrous mesh cloth, can be according to the caliber of rubber inner tube 1 Size or user require to be sized size.
4th step, the preparation of flame protection layer 4.
Flame protection layer material is immersed in phenolic resin under normal temperature, makes phenolic resin complete wetting flame protection layer material Fiber；Then flame protection layer material is adhered to the surface of grid enhancement layer 3.
Described flame protection layer material is fine from glass fabric, glass fibre felt, basalt fiber cloth, basalt Tie up the one or more in felt.
The preparation process of described phenolic resin is as follows：100 parts of phenolic resin and 6 parts of curing agent are weighed according to parts by weight, Mechanical agitation is well mixed, mixing speed 500r/min, mixing time 5min.Described curing agent is typically to toluene Sulfonic acid, benzene sulfonic acid, petroleum sodium sulfonate, phosphoric acid or phenolsulfonic acid.
Described flame protection layer 4 includes following four structure type：
1) fiber cloth or fibrofelt band overcoat：As shown in Figure 1B, fiber cloth or the width of fibrofelt band 401 and thickness Depending on environmental condition requirement and the diameter of rubber inner tube 1, fiber cloth or fibre when heat resistant requirements are high, the diameter of rubber inner tube 1 is big The thickness of dimension felt rug band 401 can be larger, and is advisable with 1~3 layer of fiber cloth or the 0.5~5.0cm of thickness of fibrofelt band 401.
2) upright sawtooth fiber type flipe overcoat, as shown in Figure 1 C, upright sawtooth pattern fiberoptic fiber flipe 402 with Upright zigzag structure perpendicular to the outer surface of rubber inner tube 1 is coated on the outer surface of rubber inner tube 1.Specific size such as Fig. 4 institutes Show, the folding unit length l and the external diameter of rubber inner tube 1 of each zigzag structure relation are：
Wherein：
L represents zigzag structure folding unit length；
R represents the half of rubber inner tube external diameter；
D represents the thickness of expansion thermal insulation layer 2；
8 represent that the expansion multiple for expanding thermal insulation layer 2 is 8 times；
N represents the pleated sheet number of upright sawtooth fiber type flipe 402.
Upright sawtooth fiber type flipe 402 is soaked into phenolic resin curing and phenolic resin is not soaked at folding feet position, purpose It is both to have realized that phenolic resin protected fire retardation with cooperateing with for fiber cloth, the deformation for flame protection layer 4 again provides the free degree, real The free wxpansion of existing internal expansion thermal insulation layer 2.
3) zigzag fiber flipe overcoat is lieed down, as shown in figure iD structure, shown prostrate zigzag fiberoptic fiber folding Outer surface of the laying up 403 along rubber inner tube 1 lies down zigzag cladding.Specific size as shown in figure 5, folding unit length l with The relation of the radius of rubber inner tube 1 is：
Wherein：
L represents the unit length of folding short side, and long side is 2 times of bond length；
R represents the half of the external diameter of rubber inner tube 1；
D represents the thickness of expansion thermal insulation layer 2；
8 represent that the expansion multiple for expanding thermal insulation layer 2 is 8 times；
N represents to lie down the pleated sheet number of zigzag fiber flipe 403.
Zigzag fiber flipe 403 will be lieed down and soak phenolic resin curing and phenolic resin is not soaked at folding feet position, purpose It is both to have realized that phenolic resin protected fire retardation with lying down cooperateing with for zigzag fiber flipe 403, is again flame protection layer 4 Deformation provides the free degree, realizes the free wxpansion of internal expansion thermal insulation layer 2.
Embodiment of the present invention is the foregoing is only, is not intended to limit the scope of the invention, it is every to utilize this The equivalent structure or equivalent flow conversion that description of the invention content is made, or directly or indirectly it is used in other related technology necks Domain, it is included within the scope of the present invention.
Embodiment 1
The controllable expansion oil field special-purpose fire-resistant rubber for possessing efficient thermal protection structure is prepared using method provided by the invention Oil pipe, it is specific as follows：
The first step, prepare rubber inner tube.Inner glue layer and the elastomeric material of outer glue-line are chosen, is kneaded on a mill simultaneously Associated additives are added, it is standby.Production internal diameter is 10 ± 0.5mm, wall thickness is that (fluorubber inner glue layer thickness is 10.5 ± 0.5mm 7mm, enhancement layer thickness are 0.5mm, and epichlorohydrin rubber outer glue-line thickness is 3mm) rubber oil hose, method and step is as follows：
(1) fluorubber inner glue layer is extruded by extruder, extrusion temperature be followed successively by from head to screw rod 70 DEG C, 60 DEG C, 60 ℃、60℃；
(2) using aramid fiber braiding production enhancement layer, and inner glue layer surface is wrapped in, starts to extrude outer glue-line.
(3) outer glue-line epichlorohydrin rubber：Extrusion temperature is followed successively by 60 DEG C, 40 DEG C, 40 DEG C, 40 DEG C from head to screw rod.
(4) sulfidization molding process：Using one step cure method, rubber inner tube, wherein curing parameter are obtained：Curing temperature is 180 DEG C, cure time 5min.
Second step, prepare expansion thermal insulation layer：Flame-retardant phenolic resin, curing agent, 120 are weighed respectively using 1 percent balances Mesh fabric and raw-vermiculite, white carbon, the number of 80 mesh hollow glass micropearls are 100 parts, 6 parts, 30 parts, 1 part, 1 part, 10 parts, then by 120 Mesh fabric and raw-vermiculite, white carbon and 80 mesh hollow glass micropearls are mixed by mechanical agitation, standby as filler；In flame-retardant phenolic resin Mixing speed is 500r/min, mixing time 5min after middle addition p-methyl benzenesulfonic acid, after mechanical agitation mixes, adds filler simultaneously Stirred with 500r/min speed, mixing time mixes for 5min, obtains expanding heat-insulated coating, standby.
3rd step, prepare grid enhancement layer：1) glass fibre is selected；2) braiding apparatus is used by the fibre bundle of glass fibre Fibrous mesh cloth is woven into, sizing grid is 20mm × 20mm；3) braiding be processed into after leno shape coat again butadiene-styrene rubber and Pure-acrylic emulsion or other reagents are protected.
4th step, prepare flame protection layer；Fiber cloth or the resin pickup of fibrofelt band 401, specific implementation process are as follows：Claim 100 parts of phenolic resin and 6 parts of curing agent are measured, use mixing speed as 500r/min, mixing time mixes for 5min mechanical agitations Uniformly.Flame protection layer material selects fiberglass gridding cloth, is immersed under normal temperature in phenolic resin, makes phenolic resin complete wetting Fiber.It is 3mm to prepare the thickness of obtained flame-retardant overcoat 4.
5th step, each overcoat prepared in preceding four step is coated to outside rubber inner tube successively according to ply stacking-sequence.
1st, the heat-insulated coating parcel of the expansion prepared is arrived into the outer surface of rubber inner tube 1 with extruder, as shown in Fig. 2 swollen Swollen 3.0 ± the 0.5mm of thickness of thermal insulation layer 2, the expansion thickness of thermal insulation layer 2 can be determined using needs according to environment；It is such as Fig. 3, grid is big The small fiberglass gridding cloth parcel for 10.0mm × 10.0mm is overlapping to expansion thermal insulation layer 2 outer surface, fiberglass gridding cloth 10.0mm or so, form grid enhancement layer 3.Grid enhancement layer 3 prevents from causing to expand thermal insulation layer 2 and rupture when rubber tube from bending to take off Fall.
2nd, flame protection layer 4 prepared by the 4th step is wrapped up by the surface of grid enhancement layer 3 by extruder, is positioned over baking oven In, solidify 360min at a temperature of 60 DEG C, that is, obtain final controllable expansion oil field special-purpose fire-resistant sebific duct.As shown in Figure 1A, make Standby obtained controllable expansion oil field special-purpose fire-resistant sebific duct includes rubber inner tube 1, expansion thermal insulation layer 2, grid enhancement layer 3 and fire-retardant anti- Sheath 4, wherein, the 10~11mm of wall thickness of rubber inner tube 1, expand the thickness 2.5mm~3.5mm of thermal insulation layer 2, the thickness of grid enhancement layer 3 0.5~1.0mm, the thickness of flame protection layer 4 are 3mm.
Embodiment 2
The rubber oil hose for possessing efficient thermal protection structure is prepared using method provided by the invention, it is specific as follows：
The first step, prepare rubber inner tube.Inner glue layer and the rubber of outer glue-line are kneaded on a mill and add phase Additive is closed, it is standby.Production internal diameter is 10.0 ± 0.5mm, wall thickness is that (fluorubber inner glue layer thickness is 10.5 ± 0.5mm 7.0mm, enhancement layer thickness are 0.5mm, and epichlorohydrin rubber outer glue-line thickness is 3mm) rubber oil hose, method and step is as follows：
(1) fluorubber inner glue layer is extruded by extruder, extrusion temperature be followed successively by from head to screw rod 80 DEG C, 70 DEG C, 70 ℃、70℃；
(2) using aramid fiber braiding production enhancement layer, and inner glue layer surface is wrapped in, starts to extrude outer glue-line.
(3) outer glue-line epichlorohydrin rubber：Extrusion temperature is followed successively by 75 DEG C, 60 DEG C, 60 DEG C, 60 DEG C from head to screw rod.
(4) sulfidization molding process：Using one step cure method, rubber inner tube, wherein curing parameter are obtained：Curing temperature is 170 DEG C, cure time 20min.
Second step, prepare expansion thermal insulation layer：Flame-retardant phenolic resin, curing agent, 200 are weighed respectively using 1 percent balances Mesh fabric and raw-vermiculite, white carbon, 100 mesh hollow glass micropearls, azodicarbonamide weight number for 100 parts, 6 parts, 70 parts, 6 Part, 4 parts, 40 parts, then fabric and raw-vermiculite, white carbon and hollow glass micropearl are mixed by mechanical agitation, it is standby as filler； Mixing speed is 500r/min after curing agent is added in flame-retardant phenolic resin, mixing time 5min, after mechanical agitation mixes, is added Enter filler and stirred with 500r/min speed, mixing time mixes for 5min, obtains expanding heat-insulated coating, standby.
3rd step, prepare grid enhancement layer：1) basalt fibre is selected；2) using braiding apparatus by bundle weave into fibre Grid cloth is tieed up, sizing grid is 10.0mm × 10.0mm；3) braiding is processed into after leno shape coats butadiene-styrene rubber and pure third again Emulsion or other reagents are protected, and obtain basalt fibre grid cloth.
4th step, flame protection layer is prepared, weigh 100 parts of phenolic resin and 6 parts of curing agent, mixed using mechanical agitation equal It is even.Flame protection layer material selects basalt fiber cloth, is immersed under normal temperature in phenolic resin, makes phenolic resin complete wetting fiber Cloth.Flame protection layer thickness in monolayer 2.0mm.
5th step, each overcoat prepared in preceding four step is coated to outside rubber inner tube successively according to ply stacking-sequence.
1st, the heat-insulated coating parcel of the expansion prepared is arrived into rubber inner tube outer surface with extruder, expands insulation thickness 2.5 ± 0.5mm, expansion insulation thickness can be determined using needs according to environment；It is 10.0mm × 10.0mm's by sizing grid Basalt fibre grid cloth parcel is to thermal insulation layer outer surface, the overlapping 10.0mm of grid cloth or so is expanded, as grid enhancement layer.Net Lattice enhancement layer prevents from causing to expand thermal insulation layer and rupture when rubber tube from bending to come off.
2nd, the flame protection layer parcel prepared the 4th step by extruder strengthens layer surface to grid, it is preferred that parcel 1 layer of flame protection layer, is then placed into baking oven, solidifies 360min at a temperature of 60 DEG C, that is, obtains final controllable expansion oil Field special-purpose fire-resistant sebific duct.
As shown in Figure 1B, the controllable expansion oil field special-purpose fire-resistant sebific duct being prepared includes rubber inner tube 1, expansion thermal insulation layer 2nd, grid enhancement layer 3 and ribbon flame protection layer 4.Wherein, the 10~11mm of wall thickness of rubber inner tube 1, the thickness 2 of thermal insulation layer 2 is expanded ~3mm, the 0.5~1.0mm of thickness of grid enhancement layer 3, the thickness 2.0mm of ribbon flame protection layer 4.
According to the preparation technology of above-described embodiment 1, thick with 0.5mm, the length of side 100mm aluminium flake of square 6061 is attachment, To substitute rubber inner tube, the expansion of the expansion thermal insulation layer, grid enhancement layer, flame protection layer composition in addition to rubber inner tube is prepared Anti-flaming thermal-insulation system, original depth are 3.0 ± 0.2mm, carry out ignition test.Ignition test uses alcohol blast burner, wine with burning things which may cause a fire disaster When smart blowtorch jet opening distance temperature sensor distance is 90mm, temperature indicator shows that flame temperature is 1288 DEG C.Ignition test Carried out using this alcohol blast burner apart from controllable expansion anti-flaming thermal-insulation system lower surface (flame protection is laminated) 90mm distances. Alcohol blast burner relies on the rotation of bottom rotation platform, the square test sample that the described test piece length of side is 100mm, is testing Sample central diameter 50.0mm or so scope calcination, temperature sensor are located at test sample by the calcination back side (aluminium surface is the back side) Heart position, measured temperature are shown on temperature indicator, and are recorded by computer record software.It is bent by analysis time-temperature Line, you can obtain the flame-proof heat-resistant performance of expandable flame retardant thermal-insulating system.Result is shown after calcination test, thick after test sample expansion Spend for 25mm, specimen cross section figure after expansion is as shown in fig. 6, system synthesis expansion multiplying power is 8 times or so.Back side heating curve is at any time Between change as shown in fig. 7, protection system in 3min, back temperature is quickly ramped up to 90 DEG C by 25 DEG C, and intumescent system is in this stage Constantly expansion, in 3min~15min, intumescent system carbonization, temperature keeps relative stability, and plays excellent fire-retardant, fire resisting, guarantor Temperature, heat-blocking action, after 15min, carbonization system top layer aoxidizes in high temperature environments to come off, fire-retardant heat insulation decreased effectiveness, heating Speed improves.Generally speaking, within 18 minutes flame protection system can the back side temperature control below 120 DEG C.
Experiments verify that for expanding material system, heat-insulated not expand when environment temperature is below 200 DEG C, thermal conductivity factor About 0.115W/mK, when temperature is more than 200 DEG C, trap heat is expanded by system and internally conducted, heat-blocking action is played, leads Hot coefficient about 9.8 × 10-2W/mK.White carbon is introduced in system to be strengthened, while can improve the temperature tolerance of resin matrix.Introduce Hollow glass micropearl, the thermal conductivity of system is reduced, intumescent system heat-proof quality can be improved.Measured result shows that intumescent system is straight 1288 DEG C of jet flames of barrier are connect, internal temperature can be kept at 120 DEG C to assign 18min.With the extension of time, controllable expansion The temperature at the fire resisting fire guard back side slowly rises.In hot environment, flame-retardant phenolic resin high temperature cabonization, tridimensional network is formed Being attached to fiber cloth/felt, (glass fibre and basalt fibre can be used under 800 DEG C of environment for a long time, and short-period used temperature is up to On 1000 DEG C, the stop to heat-flash air-flow and heat radiation can be effectively realized, effectively protection expansion thermal insulation layer.
Controllable expansion oil field special-purpose fire-resistant sebific duct prepared by the present invention, there is excellent flame-retardant performance, it is especially suitable In the heat-insulated demand of the flame-retardant of harsh hot environment.

Claims (3)

  1. A kind of 1. preparation method of controllable expansion oil field special-purpose fire-resistant sebific duct, it is characterised in that：The preparation method includes as follows Step,
    The first step, the preparation of rubber inner tube；
    Second step, expansion thermal insulation layer is prepared outside rubber inner tube；Described expansion thermal insulation layer is coated on rubber by extrusion way The outer surface of inner tube；
    Described expansion thermal insulation layer is prepared as：
    Phenolic resin, curing agent, 120~200 mesh fabric and raw-vermiculites, white carbon, 80~100 mesh hollow glass micropearls, idol are weighed respectively The parts by weight of nitrogen diformamide are 100 parts, 6 parts, 30~70 parts, 1~6 part, 1~4 part, 10~40 parts, then by 120~ 200 mesh fabric and raw-vermiculites, white carbon, 80~100 mesh hollow glass micropearls, azodicarbonamide are mixed by mechanical agitation, as filling out Material；Stirred after adding filler in phenolic resin, mixing speed is 200~1500r/min, and mixing time is 3~15min, machine After tool stirs and evenly mixs, add curing agent and stirred with 200~1500r/min speed, mixing time mixes for 3~15min, obtains To the heat-insulated coating of expansion；The heat-insulated coating of expansion prepared is coated to the outer surface of rubber inner tube with extruder, obtained Expand thermal insulation layer；
    3rd step, winding or cladding grid enhancement layer outside expansion thermal insulation layer；Described grid enhancement layer is one layer of fiber mesh Cloth, fibrous mesh cloth is wound or is coated to expansion thermal insulation layer outer surface, is then placed into solidifying 360min at a temperature of 60 DEG C, Grid enhancement layer is formed, expansion thermal insulation layer is strengthened；
    4th step, flame protection layer is prepared outside grid enhancement layer, obtain controllable expansion oil field special-purpose fire-resistant sebific duct
    Described flame protection layer includes following three kinds of structure types：
    1) fiber cloth or fibrofelt band overcoat, 0.5~5.0mm of 1~3 layer of fiber cloth or fibrofelt beam thickness；
    2) upright sawtooth fiber type flipe overcoat, folding unit length l and the rubber inner tube external diameter of each zigzag structure Relation be：
    <mrow> <mi>l</mi> <mo>=</mo> <mfrac> <mrow> <mn>2</mn> <mi>&amp;pi;</mi> <mrow> <mo>(</mo> <mi>R</mi> <mo>+</mo> <mn>8</mn> <mi>d</mi> <mo>)</mo> </mrow> </mrow> <mi>n</mi> </mfrac> </mrow>
    Wherein, l represents zigzag structure folding unit length；R represents the half of rubber inner tube external diameter；D represents expansion thermal insulation layer Thickness；N represents the pleated sheet number of upright sawtooth fiber type flipe；
    By upright sawtooth fiber type flipe leaching phenolic resin curing, phenolic resin is not soaked at folding feet position；
    3) zigzag fiber flipe overcoat is lieed down, folding unit length l and rubber inner tube radius relation are：
    <mrow> <mi>l</mi> <mo>=</mo> <mfrac> <mrow> <mn>4</mn> <mi>&amp;pi;</mi> <mrow> <mo>(</mo> <mi>R</mi> <mo>+</mo> <mn>8</mn> <mi>d</mi> <mo>)</mo> </mrow> </mrow> <mrow> <mn>3</mn> <mi>n</mi> </mrow> </mfrac> </mrow>
    Wherein, l represents to fold the unit length of short side, and long side is 2 times of bond length；R represents the half of rubber inner tube external diameter； D represents the thickness of expansion thermal insulation layer；N represents to lie down the pleated sheet number of zigzag fiber flipe；
    Will lie down zigzag fiber flipe leaching phenolic resin curing and phenolic resin is not soaked at folding feet position.
  2. A kind of 2. preparation method of controllable expansion oil field special-purpose fire-resistant sebific duct according to claim 1, it is characterised in that：Institute The flame protection layer stated is glass fabric, glass mat, basalt fiber cloth, one kind in basalt fibre felt or several Kind；
    Described fibrous mesh cloth is selected from fiberglass gridding cloth, basalt fibre grid cloth, carbon fiber mesh fabric, aramid fiber One or more of fibrous mesh cloths in grid cloth, mesh length of side 5mm~20mm of the fibrous mesh cloth.
  3. A kind of 3. controllable expansion oil field special-purpose fire-resistant sebific duct, it is characterised in that：The controllable expansion oil field special-purpose fire-resistant sebific duct is adopted It is prepared with the preparation method of claim 1, gross thickness 5.5mm~25.0mm, rubber inner tube outer surface is sequentially prepared expansion Thermal insulation layer, grid enhancement layer and flame protection layer, wherein rubber inner tube internal diameter 4.0mm~100.0mm, wall thickness 4.0mm~ 15.00mm；The expansion insulation thickness 0.5mm~5mm, grid enhancement layer 0.5~1.0mm of thickness, flame protection thickness degree For 0.5~5.0mm.
CN201610272917.6A 2016-04-28 2016-04-28 A kind of controllable expansion oil field special-purpose fire-resistant sebific duct and preparation method thereof Active CN105840925B (en)

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