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A controllable expansion refractory sleeve and its preparation method
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A fire-resistant and casing technology, applied to chemical instruments and methods, hoses, pipes, etc., can solve the problems of increased equipment maintenance costs, failure of rubber inner tubes, cost increases, etc., to achieve excellent thermal protection and improve thermal insulation performance , Improve the effect of temperature resistance
Active Publication Date: 2018-01-12
HEBEI SIBERIA SPECIAL RUBBER
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Description
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Problems solved by technology
The above methods can improve the service life of the oil pipe to a certain extent, but the fire-resistant effect has certain limitations, which are mainly reflected in the following aspects: (1) The rubber oil pipe with a flame-retardant layer, the flame-retardant layer has a fire-resistant effect, but the heat The conductivity is high, the heat insulation effect is not good, and the heat is transferred to the rubber inner tube through the surface layer, causing the rubber inner tube to fail; (2) add a fire-resistant sleeve to the rubber tube, taking the silicone rubber fire-resistant sleeve as an example, the thickness of the sleeve is certain and No expansion, obvious fire-resistant effect, limited heat insulation effect; (3) The third solution above can be both fire-resistant and heat-insulated, but the price of refractory rubber is high, resulting in increased costs; (4) The flame-retardant hose body After the heat insulation layer fails, the whole rubber tube needs to be replaced, which not only affects the production, but also increases the maintenance cost of the equipment
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preparation example Construction
[0032] The invention provides a method for preparing a controllable expansion refractory casing, which specifically includes the following steps:
[0033] The first step is the preparation of the bearing layer.
[0034] The material of the bearing layer can be cotton yarn, polyester, nylon (nylon), acrylic fiber, vinylon, polypropylenefiber or spandex, and the yarn of the selected material is woven into a strip plain weave or satin with a width of 5-15cm and a thickness of 0.1mm by a loom Weave fabric, the warp and weft density of the fabric is 30-50 threads / 10mm.
[0035] In the second step, an adhesive layer is prepared on the carrier layer.
[0036] The composition of the bonding layer is polyvinyl formal, and the polyvinyl formal glue is applied to one side of the bearing layer, and the excess glue is scraped off with a squeegee to form a bonding layer on one side of the bearing layer; or Immerse the bearing layer in polyvinyl formal glue, scrape off excess glue with a ...
Embodiment 1
[0052] A single-layer controllable expansion refractory sleeve with a high-efficiency thermal protection structure is prepared by the method provided by the present invention, as follows:
[0053] The first step is the preparation of the bearing layer.
[0054] Cotton yarn is selected as the material of the bearing layer, and the cotton yarn is woven into a striped plain fabric with a width of 5 cm and a thickness of 0.1 mm by a loom, and the density of the fabric in the warp direction and weft direction is 30 pieces / 10mm.
[0055] In the second step, an adhesive layer is prepared on the carrier layer.
[0056] Such as Figure 2A with 2B As shown, the polyvinyl formal glue is applied to one side of the bearing layer 4 , and the excess glue is scraped off with a squeegee to obtain the adhesive layer 3 .
[0057] The composition of the bonding layer is polyvinyl formal, and the preparation process is as follows. In a reaction kettle, add 10 parts of deionized water and 1 part...
Embodiment 2
[0072] Adopt the method provided by the present invention to prepare the expansion refractory casing with high-efficiency thermal protection structure, specifically as follows:
[0073] The first step is the preparation of the bearing layer.
[0074] The material of the bearing layer is polyester, and the polyester yarn is woven into a striped satin fabric with a width of 15cm and a thickness of 0.1mm by a loom, and the density of the fabric in the warp and weft directions is 50 threads / 10mm.
[0075] In the second step, an adhesive layer is prepared on the carrier layer.
[0076] The composition of the adhesive layer 3 is polyvinyl formal, the bearing layer 4 is immersed in the polyvinyl formal glue, and the excess glue is scraped off with a scraper, and the adhesive layer is obtained on the two sides of the bearing layer 4 respectively. 3, such as Figure 3A with 3B .
[0077] The preparation process of the polyvinyl formal glue is as follows:
[0078] In the reactor, a...
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Abstract
The invention discloses an expansion-controllable fire-resistant sleeve and a production method thereof and belongs to the technical field of composite materials and preparation thereof. The preparation method of the expansion-controllable fire-resistant sleeve includes: preparing an adhesive layer on a bearing layer, and adhering expansion fire-resistant particles to the surface of the adhesive layer to obtain a single-layer or double-layer expansion-controllable fire-resistant belt; using an accessory structure to fix the single-layer or double-layer expansion-controllable fire-resistant belt to the outside of a rubber tube to obtain the single-layer or double-layer expansion-controllable fire-resistant sleeve. In a high-temperature environment, the expansion fire-resistant particles expand to bring a flame retardance and thermal insulation effect into play. The adhesive layer is mainly used for adhering in a normal-temperature or low-temperature environment and is softened and degraded in the high-temperature environment. The bearing layer is mainly used for bearing the expansion and fire-resistant particles in the normal-temperature or low-temperature environment and is degraded and carbonized in the high-temperature environment. The expansion-controllable fire-resistant sleeve has the advantages that the sleeve is applicable to high-pressure rubber tubes to greatly increase the thermal resistance of the rubber tubes and greatly prolong the service life of the rubber tubes, and the sleeve is good in reliability and well applicable to various high-temperature environments.
Description
technical field [0001] The invention belongs to the technical field of composite materials and their preparation, and in particular relates to a fire-resistant sleeve with controllable expansion flame-retardant performance and high-efficiency thermal protection performance and a preparation method thereof. Background technique [0002] Rubber hoses used in high-temperature environments with heat sources or heat radiation sources in oil fields and steel mills not only require excellent oil resistance, pressure resistance, bending resistance, fatigue resistance, etc., but also require rubber hoses to have good resistance. Fire resistance performance. Since the heat-resistant temperature of rubber is lower than 200°C, when used in a high-temperature environment (200-1200°C), it is easy to age and decompose, resulting in rubber tube rupture and equipment shutdown, which not only increases maintenance costs, reduces production efficiency, but also increases Hidden dangers in saf...
Claims
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Application Information
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