CN218768804U - Scouring-resistant heat-insulation-preventing composite casing pipe - Google Patents
Scouring-resistant heat-insulation-preventing composite casing pipe Download PDFInfo
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- CN218768804U CN218768804U CN202221466684.0U CN202221466684U CN218768804U CN 218768804 U CN218768804 U CN 218768804U CN 202221466684 U CN202221466684 U CN 202221466684U CN 218768804 U CN218768804 U CN 218768804U
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Abstract
The utility model provides a scouring-resistant heat-insulating composite sleeve, which is divided into seven layers from inside to outside, wherein the first layer is made of a silicon rubber sleeve as a framework material; the second layer is an aramid fiber silk woven sleeve layer; the third layer is a low heat conduction coating layer; the fourth layer is a phase change energy storage coating layer; the fifth layer is a flexible special heat-proof and heat-insulating coating; the sixth layer is an alkali-free glass fiber braided sleeve layer; the seventh layer is a stainless steel fiber braided sleeve layer. The sleeve has the characteristics of scouring resistance, heat insulation and the like.
Description
Technical Field
The utility model relates to a hot protective material of instrument, electric connector, cable of aircraft high temperature region, heating region, concretely relates to cable, heart yearn to high temperature heating region on the aircraft carry out the resistant scouring that protects, prevent thermal-insulated composite sleeve pipe and preparation method thereof.
Background
According to the requirements of certain type of aircraft, a heat-proof sleeve which has scouring resistance, heat insulation resistance and high-temperature area cable and core wire protection needs to be developed, and the sleeve is required to be 50000kW/m 2 And under the condition of heat flow, the temperature is kept for 0.5 second, the sleeve is not allowed to break, and the temperature of the outer surfaces of the cable and the core wire in the sleeve is not higher than 100 ℃.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a scour-resistant thermal-insulated composite sleeve and a preparation method thereof.
In order to solve the technical problem, the utility model discloses a compound sheathed tube technical scheme is to prevent insulating against heat about resistant washing: a scour-resistant heat-insulating composite sleeve is divided into seven layers from inside to outside, wherein the first layer is made of a silicon rubber sleeve as a framework material; the second layer is an aramid fiber silk woven sleeve layer; the third layer is a low heat conduction coating layer; the fourth layer is a phase change energy storage coating layer; the fifth layer is a flexible special heat-proof and heat-insulation coating; the sixth layer is an alkali-free glass fiber braided sleeve layer; the seventh layer is a stainless steel fiber braided sleeve layer.
In one embodiment, the method for dip-coating the low-heat-conduction coating/the phase-change energy storage coating/the flexible special heat-proof and heat-insulation coating comprises the following steps: adding the filtered low-thermal-conductivity coating/phase-change energy-storage coating/flexible special heat-proof coating into a dipping tank of a vertical gluing machine, starting an electric speed regulation meter, controlling the rotating speed to be 150-260 r/min, and circulating the composite sleeve on the vertical gluing machine for 35-50 min for one circle; discharging the residual low-heat-conduction coating/phase-change energy storage coating/flexible special heat-proof and heat-insulation coating in the dipping tank after each dipping, cleaning the dipping tank, polishing the outer peripheral surface of the sleeve once by using fine abrasive paper after curing, so that the surface of the sleeve is smooth, no obvious flow mark is generated, and the second dipping can be performed after the surface redundancy is wiped by using clean dust-free cloth; the second dip coating repeats the foregoing steps.
In one embodiment, the thickness increase of the phase change energy storage coating/flexible special heat-proof and heat-insulation coating is controlled to be 0.02-0.04mm per dip coating.
In one embodiment, the phase change energy storage coating/flexible special heat-proof and heat-insulating coating needs to be heated and cured once every time the coating is dip-coated once, and the curing temperature is controlled to be 100-120 ℃.
Preferably, the aramid fiber yarn braided sleeve is formed by 2 strands of 1414 aramid fiber yarns with the specification of 1000D and the twist degree of 180 through doubling and then filling the aramid fiber yarns into a high-speed braiding machine for braiding.
Preferably, the stainless steel fiber braided sleeve is formed by combining 2 strands of stainless steel fibers with the diameter of 12um and the twist of 120 and then loading the combined stainless steel fibers into a high-speed braiding machine for braiding.
The scouring-resistant heat-insulating composite sleeve provided by the utility model keeps flexibility by using the silicone rubber tube as the lining framework; the aramid fiber yarn braided sleeve can obstruct heat and improve scouring resistance strength; the slow heat transfer resistance is realized through the low heat conduction coating; heat storage is realized through the phase change energy storage layer; the flexible special heat-proof and heat-insulation coating layer realizes flame retardance and prevents ablative burning-through so as to retard heat transfer; the glass fiber braided sleeve is used as an ablation-resistant layer and a heat-insulating layer; the stainless steel twisted wire braided layer can resist high temperature and scouring.
Drawings
Fig. 1 is a schematic view of a composite bushing structure according to an embodiment of the present invention.
In the figure:
1-silicon rubber sleeve 2-aramid fiber braided sleeve layer
3-low heat conduction coating layer 4-phase change energy storage coating layer
5-flexible special heat-proof coating 6-alkali-free glass fiber braided sleeve layer
7-stainless steel fiber braided sleeve layer.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
As shown in fig. 1, the preferred embodiment of the present invention is: a scour-resistant heat-insulating composite sleeve is divided into seven layers from inside to outside, wherein the first layer is made of a silicon rubber sleeve 1 as a framework material; the second layer is an aramid fiber silk braided sleeve layer 2; the third layer is a low heat conduction coating layer 3 with the thickness of 0.2mm; the fourth layer is a phase change energy storage coating layer 4 with the thickness of 0.3mm; the fifth layer is a flexible special heat-proof and heat-insulation coating 5 with the thickness of 0.6mm; the sixth layer is an alkali-free glass fiber braided sleeve layer 6; the seventh layer is a stainless steel fiber braided sleeve layer 7.
The method for preparing the scouring-resistant heat-insulating composite casing pipe comprises the following process steps:
1) Plugging two ends of the silicone rubber tube 1 by using plugs, tightly binding by using binding wires, and inflating until the silicone rubber tube is round;
2) Doubling and plying 2 strands of 1414 aramid fiber yarns with the specification of 1000D and the twist of 180, putting the yarns into a high-speed braiding machine, and braiding an aramid fiber yarn braided sleeve layer outside a silicone rubber pipe;
3) Filtering the prepared low-heat-conductivity coating, pouring the filtered low-heat-conductivity coating into a dipping tank of a vertical gluing machine, and repeatedly dipping and coating the composite sleeve in the dipping tank until the thickness of the coating reaches 0.2mm;
4) Baking and curing the composite sleeve after repeated dip coating;
5) Filtering the prepared phase change energy storage coating, pouring the filtered phase change energy storage coating into a dipping tank of a vertical gluing machine, and repeatedly dipping and coating the composite sleeve in the dipping tank until the thickness of the coating reaches 0.3mm;
6) Baking and curing the composite sleeve after repeated dip coating;
7) Filtering the prepared flexible special heat-proof and heat-insulating coating, pouring the filtered flexible special heat-proof and heat-insulating coating into a dipping tank of a vertical gluing machine, and repeatedly dipping and coating the composite sleeve in the dipping tank until the thickness of the coating reaches 0.6mm;
8) Baking and curing the composite sleeve after repeated dip coating;
9) Weaving a layer of alkali-free glass fiber woven sleeve layer outside the cured sleeve;
10 2 strands of stainless steel fibers with a diameter of 12um and a twist of 120 are doubled and plied, put into a high-speed braiding machine, and a stainless steel fiber braided sleeve layer is braided outside the alkali-free glass fiber braided sleeve layer.
Preferably, the method for dip-coating the low-thermal-conductivity coating/the phase change energy storage coating/the flexible special heat-proof and heat-insulating coating in the steps 3), 5) and 7) comprises the following steps: adding the filtered low-thermal-conductivity coating/phase-change energy-storage coating/flexible special heat-proof coating into a dipping tank of a vertical gluing machine, starting an electric speed regulation meter, controlling the rotating speed to be 150-260 r/min, and circulating the composite sleeve on the vertical gluing machine for 35-50 min for one circle; discharging the residual low-heat-conduction coating/phase-change energy storage coating/flexible special heat-proof and heat-insulation coating in the dipping tank after each dipping, cleaning the dipping tank, polishing the sleeve once by using fine abrasive paper at the same time to ensure that the surface of the sleeve is smooth, and carrying out second dipping after wiping the surface excess by using clean dust-free cloth without obvious flow marks; the second dip coating repeats the foregoing steps.
Preferably, the method for preparing the low thermal conductive coating comprises the following steps: firstly, taking flowable addition type liquid silicone rubber consisting of a component A and a component B, and mixing the component A liquid silicone rubber and silica aerogel powder with the particle size of 2nm-20nm according to a mass ratio of 70: (2-5) proportionally adding into mixing equipment and uniformly stirring to obtain the coating A; secondly, mixing the component B, namely liquid silicon rubber and silicon dioxide aerogel powder with the particle size of 2nm-20nm according to a mass ratio of 70: (2-5) proportionally adding into mixing equipment and uniformly stirring to obtain a coating B; then, mixing AR-grade xylene and cyclohexanone according to a mass ratio of 1:1, mixing to form a mixed solvent, wherein the prepared mixed solvent is used for diluting the coating and adjusting the viscosity; and finally, mixing the coating A and the coating B according to a mass ratio of 1: adding the mixture into a mixing device according to the proportion of 1, stirring uniformly, adding a mixed solvent with the same mass as the paint A or the paint B, and continuously stirring until the mixture is homogeneous, thus obtaining the low-heat-conductivity paint.
Preferably, the phase change energy storage coating in the step 5) is prepared by the following method: (1) taking addition type liquid silicone rubber, and mixing the component A in the addition type liquid silicone rubber and the organic solid-solid phase change material with the phase change temperature of 185 ℃ according to the mass ratio of (20-40): (10-30) putting into a mixing device in proportion and uniformly stirring to obtain the coating C; (2) the component B in the addition type liquid silicone rubber and the organic solid-solid phase change material with the phase change temperature of 185 ℃ are mixed according to the mass ratio (20-40): (10-30) putting into a mixing device in proportion and stirring uniformly to obtain a coating D; then, mixing AR-grade xylene and cyclohexanone according to a mass ratio of 1:1, mixing to form a mixed solvent, wherein the prepared mixed solvent is used for diluting the coating and adjusting the viscosity; (3) and (3) mixing the paint C and the paint D according to the mass ratio of 1: and (3) adding the mixture into mixing equipment according to the proportion of 1, uniformly stirring, adding a mixed solvent with the same mass as that of the coating C or the coating D, and continuously stirring until the mixture is homogeneous, thus obtaining the phase change energy storage coating.
Preferably, the flexible special heat-proof and heat-insulating coating in the step 7) is prepared by adopting the following method: (1) adding a component A in the liquid silicone rubber, AR-grade ammonium polyphosphate, AR-grade ammonium borate, AR-grade zinc oxide, medical starch, a silicone rubber flame retardant, a silicone rubber foaming agent and AR-grade zinc borate according to a mass ratio of (65-80): (0.5-1.5): (1.5-2): (9-11): (7-9): (10-14): (1.2-1.6): (5-6.4) mixing, grinding and uniformly stirring to obtain the component A coating; (2) adding a component B, AR-grade ammonium polyphosphate, AR-grade ammonium borate, AR-grade zinc oxide, medical starch, a silicone rubber flame retardant, a silicone rubber foaming agent and AR-grade zinc borate in the addition type liquid silicone rubber according to the mass ratio of (65-80): (0.5-1.5): (1.5-2): (9-11): (7-9): (10-14): (1.2-1.6): (5-6.4) mixing, grinding and uniformly stirring to obtain a component B coating; (3) mixing AR grade xylene and cyclohexanone according to a mass ratio of 1:1, uniformly mixing to obtain a mixed solvent for diluting the coating and adjusting the viscosity; (4) mixing the component A coating and the component B coating according to the mass ratio of 1: adding the mixture into a mixing device according to the proportion of 1, uniformly stirring, adding a mixed solvent with the same mass as the component A coating and the component B coating, and continuously stirring until the mixture is homogeneous to obtain the flexible special heat-proof and heat-insulating coating.
According to the scouring-resistant heat-insulating composite sleeve provided by the embodiment, the sleeve keeps flexibility by taking the silicone rubber tube as a lining framework; the aramid fiber yarn braided sleeve can obstruct heat and improve scouring resistance strength; the slow heat transfer resistance is realized through the low heat conduction coating; heat storage is realized through the phase change energy storage layer; the flexible special heat-proof and heat-insulation coating layer realizes flame retardance and prevents ablative burning-through so as to retard heat transfer; the glass fiber braided sleeve is used as an ablation-resistant layer and a heat-insulating layer; the stainless steel twisted wire braided layer can resist high temperature and scouring.
The above-mentioned embodiment does the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.
Some of the figures and descriptions of the present invention have been simplified to provide a convenient understanding of the modifications over the prior art by those skilled in the art, and some other elements have been omitted for clarity, and it should be appreciated by those skilled in the art that the omitted elements may also constitute the content of the present invention.
Claims (5)
1. A scour-resistant heat-insulating composite sleeve is divided into seven layers from inside to outside, wherein the first layer is made of a silicon rubber sleeve as a framework material; the second layer is an aramid fiber silk woven sleeve layer; the third layer is a low heat conduction coating layer; the fourth layer is a phase change energy storage coating layer; the fifth layer is a flexible special heat-proof and heat-insulation coating; the sixth layer is an alkali-free glass fiber braided sleeve layer; the seventh layer is a stainless steel fiber braided sleeve layer.
2. The scour-resistant, heat-insulating composite bushing of claim 1, wherein: the aramid fiber yarn braided sleeve is formed by doubling 2 strands of 1414 aramid fiber yarns with the specification of 1000D and the twist of 180 and then filling the doubled aramid fiber yarns into a high-speed braiding machine for braiding.
3. The scour-resistant, heat-insulating composite bushing of claim 1, wherein: the thickness of the phase change energy storage coating layer is 0.25-0.35 mm.
4. The scour-resistant, heat-insulating composite bushing of claim 1, wherein: the thickness of the flexible special heat-proof and heat-insulating coating is 0.55-0.65 mm.
5. The scour-resistant, heat-insulating composite bushing of claim 1, wherein: the stainless steel fiber braided sleeve is formed by putting 2 strands of stainless steel fibers with the diameter of 12um and the twist of 120 into a high-speed braiding machine after being doubled and braided.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221466684.0U CN218768804U (en) | 2022-06-13 | 2022-06-13 | Scouring-resistant heat-insulation-preventing composite casing pipe |
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| CN202221466684.0U CN218768804U (en) | 2022-06-13 | 2022-06-13 | Scouring-resistant heat-insulation-preventing composite casing pipe |
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| CN218768804U true CN218768804U (en) | 2023-03-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914021A (en) * | 2022-06-13 | 2022-08-16 | 湖南星鑫航天新材料股份有限公司 | Scouring-resistant heat-insulation-preventing composite casing pipe and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914021A (en) * | 2022-06-13 | 2022-08-16 | 湖南星鑫航天新材料股份有限公司 | Scouring-resistant heat-insulation-preventing composite casing pipe and preparation method thereof |
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