KR101510523B1 - Centrifugal molded airgel pipe lagging and its production method and manufacturing apparatus and airgel slurry composition - Google Patents

Abstract

The present invention relates to a centrifugally formed aerogel pipe insulation material based on an aerogel which is formed by a centrifugal molding method for forming a piping insulation material based on an aerogel, a manufacturing method thereof, a manufacturing apparatus and an airgel slurry composition, wherein a plurality of dewatering holes A cylindrical shaping drum constituted by two semicylinders that can be dewatered and formed of one cylinder at the time of coupling; a cylindrical shaping drum which rotates at high speed and advances in the axial direction of the drum to inject airgel slurry into the shaping drum; A centrifugal molding machine preparing step of preparing a centrifugal molding machine constituting the aerosol slurry supplying means;
A short fiber formed by cutting an airgel powder, a binder, a water-soluble resin, a surfactant and a fiber into a stirrer at a thickness of 3 to 10 mm and an additive for adjusting the overall strength or obtaining other functions depending on the purpose of the molding to be molded, next,
An aerosol slurry production process, which is a process for preparing an aerosol slurry so as to be in a gel state while stirring water while adding water;
The forming drums provided in the centrifugal molding machine preparation step are separated in half, and a filter cloth is attached to each of the forming drums so as to prevent the airgel slurry from leaving the outside, and the surface of the filter cloth is covered with an inorganic binder, A centrifugal molding preparation step of attaching a protective cloth to the drum and then joining it to a rotating means of the centrifugal molding machine;
As described above, when the molding preparation is completed in the centrifugal molding preparation step of the first process, the motor of the centrifugal molding machine is operated to rotate the driving means, and the aerosol slurry in the gel state obtained in the aerosol slurry manufacturing step A primary centrifugal molding process, which is a second process for forming a molded product having a uniform thickness of airgel slurry by a centrifugal force due to the rotation of the forming drum when the outer peripheral surface protective cloth attached to the inner surface filter cloth of the forming drum is evenly supplied, ;
A stiffener attaching step of attaching a stiffener made of organic or inorganic fiber mesh to the inner circumferential surface of the airgel slurry formed in a cylindrical shape in the forming drum in the second step of the first centrifugal forming step;
When the attachment of the reinforcing material as the organic or inorganic fiber mesh is completed in the step of attaching the reinforcing material as the third step, the centrifugal molding machine is operated again, and the gel airgel slurry obtained in the aerogel slurry manufacturing step is introduced into the molding drum A double centrifugal molding process in which four processes are repeatedly applied to an inner circumferential surface of a reinforcing material made of a fiber mesh attached to a molded aerogel molding and re-applied at a uniform thickness;
An inner surface finishing material attaching step which is a fifth step of attaching an inner circumferential surface protective cloth made of a woven fabric or nonwoven fabric coated with an inorganic binder on the surface of the inner circumferential surface of the formed airgel molding to form an airgel pipe heat insulating material by the above process;
The sixth step of completely dehydrating the water contained in the formed airgel pipe insulation material by moving the motor of the centrifugal molding machine at a high speed for at least 10 minutes or more in a state in which the first to fifth steps are sequentially performed, ;
Which is a seventh step of separating a forming drum from a pipe insulating material which is a molded product formed by dewatering in the dehydration step, which is the sixth step, to prepare for the next operation;
A drying and moisture removing step, which is an eighth step of completely removing the moisture by removing the moisture in the drying chamber, which is a molded product separated from the molding drum in the step of separating the molding, which is the seventh step, into a drying chamber equipped with a microwave heating system;
A ninth step of dividing the tubular heat insulating material completely dried in the drying and moisture removing step, which is the eighth step, into a tubular heat insulating material which is completely dried to remove moisture and moisture;
In the ninth step, the airgel molding is combined with a short fiber and a binder in a packaging process, which is a tenth step of commercializing the piping heat insulating material, Inside, there is reinforcing material made of fiber mesh. Protective cloth is integrally formed and protected on the outer and inner circumferential surfaces to prevent scattering of dust to improve the working environment and to reinforce the strength of the molding to maintain shape retention. And it is a new invention having an effect that productivity can be improved by quick dewatering and wetting agent removal and can be performed by a heat insulating material of an industrial facility.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal forming airgel pipe insulation material, a manufacturing method thereof, a manufacturing apparatus, and an airgel slurry composition,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal-molded airgel pipe insulation material, a method for manufacturing the same, an apparatus for manufacturing the same, and an airgel slurry composition. More particularly, the present invention relates to a centrifugal- A manufacturing method thereof, a manufacturing apparatus and an airgel slurry composition.

The airgel has a porosity of 90% or more and a pore size of 50 nm and a specific surface area of about 400-1000 ㎡ / g are excellent in insulation, catalyst, electrode material, sound insulating material, low dielectric substance, shock absorber It is a state-of-the-art material used in fields such as

In general, aerogels are ultra-fine and porous low-density materials, and various applications such as catalyst carrier, thermal insulator, particle accelerator are being applied.

In particular, aerogels are used as insulating materials as described in EP-A 0 171 722 because of their extremely low thermal conductivity as a meaning of a gel containing air as a dispersant in a broad sense, and because of the specific acoustic impedance of the aerosol, Applications that are comparable to impedance means in the art are described in the literature.

In addition, aerogels are basically divided into inorganic and organic aerogels, inorganic aerogels have been known since 1931 (SS Kistler, Nature 1931, 127, 741), aerogels are all kinds of starting materials, SiO2, Al2O3, TiO2, ZrO2 , SnO2, Li2O, CeO2 and V2O5 aerogels and mixtures thereof (HD Gesser, PC Goswami, Chem. Rev. 1989, 89, 756ff).

It is also known that organic aerogels are made from all kinds of starting materials such as melamine formaldehyde (R. W. Pekala, J. Mater, Sci. 1989, 24, 3221).

The silica aerogels have been studied for a long time and have high thermal insulation effect. However, they are hydrophilic when they are subjected to low-temperature supercritical drying, so they can be made hydrophobic by a separate process such as surface treatment. (Iler, RK: "Chemistry of Silica ", John Wiley & Sons, NY (1978).).

Research on inorganic silica aerogels has been conducted in depth in the Lawrence Livermore National Laboratory (LLNL) in the United States.

The silica airgel, which is an inorganic insulating material, has a high manufacturing cost and is disadvantageous in that water molecules are adsorbed due to the surface covered with a hydroxyl group (-OH), which may deteriorate the heat insulating effect and is fragile.

On the other hand, since conventional organic insulating materials, such as polystyrene and polyurethane foams, are subject to environmental problems using CFCs when foam molding is performed, the use of polyurethane-based airgel as a new type of insulating material Efforts to utilize have continued and already aerogels have been synthesized using polyurethanes from ICI (Imperial Chemical Industries). (Biesmans, G., Randall, D., Francais, E., Perrut, M .: J. Non -Cryst.Solids, 225, 36-40 (1998).)

These polyurethane-based aerogels are expected to be lighter and contribute to environmental protection.

The excellent characteristics of such aerogels are required to be applied to various industries such as super insulation materials for construction, high temperature insulation for industrial use, parts for automobile parts, electronic parts, ship parts, cryogenic insulation LNG, VIP core materials and catalysts.

Patent Application No. 10-2007-0129709 (December 13, 2007) relates to a method of forming a pipe insulation using an airgel blanket and a molding apparatus thereof, and more particularly, to an airgel blanket which is rolled up in a size The present invention relates to a method of forming a pipe insulation material using an airgel blanket and a molding apparatus using the airgel blanket, which is capable of improving the workability of winding a pipe by molding a pipe insulation material in which a shape for wrapping the pipe is maintained. A method of forming a pipe insulation material using an airgel blanket is a method of forming a pipe insulation material using an airgel blanket for molding an airgel blanket into a heat insulating material having a shape that can be wound on a pipe to be insulated, A winding step of winding at least two overlapping portions of the airgel blanket on a molding rod having an outer periphery of the airgel blanket and adhering mutually butted faces of the overlapping portions to each other with an adhesive; And an incision process for incision. Patent application No. 10-2011-0069419 (2011.07.13) is a pipe insulation material using aerogels which can form an airgel with excellent thermal insulation and can be applied in a short time, and has a beautiful appearance after installation. An airgel heat insulating material for preventing a temperature drop of an airgel or protecting an operator from an object, comprising: a pair of rectangular aerogel plates; The airgel plate material is bonded to one of the upper and the lower sides with a space therebetween. The other side of the airgel plate material is bonded to the remaining portions of the airgel sheet material, and the airgel sheet is rolled up into a cylindrical shape to make a pipe insulating material using airgel. The pipe heat insulating material is composed of an upper portion and a lower portion which are not bonded and are respectively formed as a fitting portion and a joining portion and are joined to the pipe insulating material using another wound airgel, and a bonding display portion is formed on one side of the aerogel plate material, . The patent application No. 10-2012-0035221 (Apr. 25, 2012) is a method for manufacturing an airgel insulation material for protecting a worker from a temperature drop or a worker's object by wrapping a pipe with a boiler or other severe temperature change, (S1) of forming a fitting portion on the upper end of the heat insulating material and forming and overlapping each other so as to have a coupling groove at the lower portion; And a step (S 2) of positioning the lower long-axis pipe and the upper surface of the shape-retaining plate formed at the center of the main body of the heat insulating material manufacturing apparatus so as to form the heat insulating material in a circular shape; And supplying power to the power supply means after the heat insulating material is installed on the long long axis pipe and the shape retaining plate (S3); And a step (S5) of rotating the shape holding plate by rotating the operating piece by the power supply; And a step (S6) of keeping the heat insulating material in a circular shape while wrapping the long longitudinal pipe by the cutting operation of the shape retaining plate; And a step (S7) of compressing and drying a plurality of the heat insulating materials dried in the circular shape to complete the heat insulating material (S7). Patent Application No. 10-2011-0069413 (July 13, 2011) is a pipe insulation material using an airgel which is formed by forming an airgel excellent in thermal insulation and can be applied within a short period of time and has a beautiful appearance after installation, An airgel heat insulating material for preventing a temperature drop of an airgel or protecting an operator from an object, comprising: a pair of rectangular aerogel plates; The airgel plate material is bonded to one of the upper and the lower sides with a space therebetween. The other side of the airgel plate material is bonded to the remaining portions of the airgel sheet material, and the airgel sheet is rolled up into a cylindrical shape to make a pipe insulating material using airgel. The pipe heat insulating material is composed of an upper portion and a lower portion that are not bonded and are respectively formed as a fitting portion and a joining portion and are joined to the pipe insulating material using another wound airgel and a bonding indicator is formed on one side of the airgel material . Patent Application No. 10-2011-0084961 (Aug. 25, 2011) discloses an airgel binder for heat insulating material, which comprises 2 to 6 parts by weight of silica sol or Bentonite, 100 parts by weight of Aerogel, 1 to 10 parts by weight of a silane coupling agent, 20 to 30 parts by weight of a 5% solution of sodium carboxymethyl cellulose, 5 to 15 parts by weight of a water-soluble adhesive, and 5 to 15 parts by weight of a flame retardant. 1 to 3 parts by weight of a silane coupling agent and 3 to 5 parts by weight of a fluorine-based water repellent agent. Wherein the aerogels are composed of at least one selected from silica (SiO2), alumina (Al2O3), titania (TiO2), carbon (C) Polyvinyl acetate, polyvinyl acetate (PVA), and polyacrylic ester. The flame retardant is at least one selected from the group consisting of bromine, phosphorus, aluminum hydroxide, antimony, and magnesium hydroxide flame retardants . A method of molding a glass fiber insulation material using an airgel binder includes a first step of stirring and dispersing the airgel binder; A second step of impregnating or applying the airgel binder to a glass fiber mat; A third step of pressing the glass envelope mat with a roller to adjust its thickness; And a fourth step of laminating the glassy matrix matrices in multiple layers, and molding and drying the glassy matrix matrices in this order.

However, since aerogels manufactured by supercritical drying are poor in bonding properties, airgel dusts are scattered during work, which makes it difficult to handle, difficulty in molding, shape maintenance In addition, it is troublesome to rework the pipe in the case of pipe insulation, and the supercritical drying equipment required for the work and the low productivity are showing limitations in realizing the product using aerosol.

An object of the present invention is to form a pipe-shaped protection material by forming a dust-free working environment by molding a molding material based on an aerosol by a centrifugal molding method in order to solve the above problems.

SUMMARY OF THE INVENTION In view of the above problems, the present invention relates to a centrifugal-forming airgel pipe insulation material based on an aerogel that forms a pipe insulation material based on an aerogel, a manufacturing method thereof, a manufacturing apparatus, and an airgel slurry composition A cylindrical shaping drum constituted by two semicylinders so that a plurality of dewatering holes can be formed and dewatered to form a single cylinder at the time of coupling, and an airgel slurry injected into the shaping drum at high speed A centrifugal molding machine preparing step of preparing a centrifugal molding machine constituting an aerosol slurry supplying means for moving in the axial direction of the drum;

A short fiber formed by cutting an airgel powder, a binder, a water-soluble resin, a surfactant and a fiber into a stirrer at a thickness of 3 to 10 mm and an additive for adjusting the overall strength or obtaining other functions depending on the purpose of the molding to be molded, An aerosol slurry production process, which is a process of forming an aerosol slurry so as to be in a gel state by stirring while adding water thereto;

The forming drums provided in the centrifugal molding machine preparation step are separated in half, and a filter cloth is attached to each of the forming drums so as to prevent the airgel slurry from falling out to the outside, and the outer peripheral surface made of woven fabric or nonwoven fabric coated with a binder on the surface of the filter cloth A centrifugal molding preparing step of attaching the foil and then joining the drum to the rotating means of the centrifugal molding machine by joining the drum to the cylindrical body;

When the preparation of the centrifugal molding is completed in the first step of preparing the centrifugal molding as described above, the motor of the centrifugal molding machine is operated to rotate the driving means, and the aerosol slurry in the gel state, A primary centrifugal molding process, which is a second process for uniformly supplying the airgel slurry to the surface of the outer circumferential surface protective film attached to the inner surface of the drum, and shaping the airgel slurry into a cylindrical pipe having a uniform thickness by centrifugal force according to the rotation of the molding drum ;

A stiffener attaching step of attaching a stiffener made of organic or inorganic fiber mesh to the inner circumferential surface of the airgel slurry formed in a cylindrical shape in the forming drum in the second step of the first centrifugal forming step;

When the attachment of the reinforcing material as the organic or inorganic fiber mesh is completed in the step of attaching the reinforcing material as the third step, the centrifugal molding machine is operated again, and the gel airgel slurry obtained in the aerogel slurry manufacturing step is introduced into the molding drum A double-centrifugal molding process in which four processes are repeatedly applied to an inner circumferential surface of a reinforcing material surface of a fiber mesh attached to a molded aerogel molding, and then applied again at a uniform thickness;

An inner surface finishing material attaching step which is a fifth step of attaching an inner circumferential surface protective cloth made of a woven fabric or nonwoven fabric coated with an inorganic binder to the inner circumferential surface of the formed airgel molding to form an airgel pipe heat insulating material by the above process;

The sixth step of completely dehydrating the water contained in the formed airgel pipe insulation material by moving the motor of the centrifugal molding machine at a high speed for at least 10 minutes or more in a state in which the first to fifth steps are sequentially performed, ;

Which is a seventh step of separating a forming drum from a piping heat insulating material which is an airgel formed by dewatering in the dehydrating step, which is the sixth step, to prepare for the next operation;

The seventh step is a drying and moisture removing step, which is an eighth step of removing the moisture by completely heating and drying the pipe insulating material, which is a molded product separated from the molding drum in the step of separating the molded product, into a drying chamber equipped with a microwave heating system ;

A piping heat insulating material dividing step, which is a ninth step of dividing the completed cylindrical piping heat insulating material into two pieces in the longitudinal direction and making it easy to cover the piping by completely drying in the drying and moisture removing step of the eighth step;

In the ninth step, the airgel molding is combined with a short fiber and a binder in a packaging process, which is a tenth step of commercializing the piping heat insulating material, And a reinforcing member made of a fiber mesh is contained in the inside, and the outer and inner circumferential surfaces are integrally bonded and protected by the protective cloth.

In the present invention, a piping heat insulating material based on aerogels is formed by a centrifugal molding method to prevent scattering of dust to improve working environment, to reinforce the strength of a molded product and to maintain shape retention so that the product can function as a product And it is possible to improve the productivity by quick dewatering and wetting agent removal, so that it can be carried out with the insulating material of the industrial facility.

FIG. 1 is a process example according to the present invention.
Fig. 2 is an exemplary diagram illustrating the configuration of a molding machine for carrying out the present invention. Fig.
3 is a diagram illustrating a stiffener for implementing the present invention and a means for attaching the inner circumferential surface protective cloth,
Fig. 4 is a cross-sectional view illustrating a configuration of a forming drum for carrying out the present invention
Fig. 5 is a drawing showing an example of the drying chamber configuration state for carrying out the present invention
Fig. 6 is a diagram showing an example of a constitutional state of a piping insulation material obtained by the practice of the present invention
7 is a cross-sectional view illustrating the configuration of a piping insulation material obtained by the practice of the present invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Preparation process of centrifugal molding machine

The centrifugal molding machine 10 is provided with a rotating means 13 that rotates at a high speed by driving a motor 16 in a housing 11 having a draining hole 12 at the lower end thereof, And a plurality of dewatering holes 21 are formed to constitute a forming drum 20 constituted by two semicylinders and made up of one cylinder when dewatered.

The housing 11 is provided with an aerosol slurry supplying unit 14 that advances in the axial direction of the building drum 20 so as to inject aerosol slurry 54 into the interior of the building drum 20.

And a stiffener attaching means (not shown) for attaching a reinforcing material 51 made of a mesh net or reinforcing cloths 52 and 53 for finishing the last inner surface to reinforce the primary molded airgel pipe insulation material inside the forming drum 20 15).

Aerogel slurry manufacturing process

50 to 90 parts by weight of an aerosol powder having a particle size of 10 to 100 microns larger than that of the filter body, one of silica, carbon, alumina silica, titania silica, composite metal silica,

A natural resin or a water-soluble acrylic resin, which is any one of natural latex, starch and chitosan mixed with water, or an inorganic binder mixed with any one of or any of lithium silicate, modified silicate, silica sol, TMOS, TEOS, lithium silicate, 1 to 10 parts by weight of an aqueous organic binder which is one of a water-soluble epoxy resin, a water-soluble urethane resin, a water-soluble fluororesin and a synthetic latex synthetic resin, 1 to 5 parts by weight of an ionic surfactant, And 5 to 10 parts by weight of short fibers formed by cutting any one of fibers of inorganic fibers to 3 to 10 mm are added and mixed with water and stirred to form an aerosol slurry 54 in a gel state .

Wherein the surfactant may be selected from ionic (anionic and cationic) surfactants, amphoteric surfactants, nonionic surfactants, polymeric surfactants and polymeric compounds, and combinations of different types of surfactants may be used It is possible.

Anionic surfactants may include, for example, alkyl sulfates and higher molecular weight alkyl ether sulfates, more particularly ammonium lauryl sulfate and sodium polyoxyethylene lauryl ether sulfate. Cationic surfactants include, for example, aliphatic ammonium salts and amine salts, more particularly alkyltrimethylammonium and polyoxyethylene alkylamines.

The amphoteric surfactant may be a betaine type, such as alkyldimethyl betaine or an oxydot type, such as an alkyldimethylamine oxyde.

The nonionic surfactant may be selected from glycerol fatty acid esters, propylene glycol fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, tetraoleic acid polyoxyethylene sorbitol, polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene Polyoxyethylene polyoxypropylene alkyl ethers, fatty acid alcohol esters higher in molecular weight than polyethylene glycol fatty acid esters, polyhydric alcohol fatty acid esters and the like.

Specific examples of surfactants include, but are not limited to, Pluronic P84, PE6100, PE6800, L121, Emulan EL, Lutensol FSA10, Rutensol XP89; Michelmann's MP5490, AEROSOL OT (sodium di-2-ethylhexylsulfosuccinate), BARLOX 12i (branched alkyldimethylamine oxide), LAS (LAS) Benzenesulfonate) and TRITON 100 (octylphenoxypolyethoxy (9-10) ethanol), TWEEN surfactants such as TWIN 100 surfactants and BASF florionic surfactants and the like, But is not limited to.

Typical classes include glycols, alkoxylate polyoxyalkylene fatty ethers such as polyoxyethylene fatty ethers, sorbitan esters, mono and diglycerides, polyoxyethylene sorbitol esters, polymeric surfactants such as the Hypermen polymeric interface Phosphate ester, polyoxyethylene (POE) fatty acid ester, Renex non-ionic surfactant (including ethylene oxide and unsaturated fatty acid (s)), sodium coco-PG-dimonium chloride phosphate and co-amidopropyl PG-dimonium chloride phosphate, An alcohol ethoxylate, an alcohol alkoxylate, an ethylene oxide / propylene oxide block copolymer, a polyoxyethylene derivative of a sorbitan ester, or a combination thereof.

10 to 50 parts by weight of a synthetic inorganic material, which is one of natural minerals, synthetic silica and bubble silica, which is one of perlite, pearlite, gypsum, talc, scorching and cement, is added to the aerogel slurry (54) Or 10 to 50 parts by weight of an IR opacifying agent selected from any of metal oxides such as carbon powder, CNT, titanium oxide, iron oxide, aluminum oxide, zirconium dioxide and zinc oxide or mixtures thereof is added to block the total radiant heat Function.

In order to control the overall strength or to obtain other functions depending on the purpose of the molding to be molded with the aerosol slurry 54, a synthetic inorganic material such as perlite, pearlite, gypsum, talc, IR part The transparentizing agent may be added with 10 to 50 parts by weight of any one of or a mixture of metal oxides such as carbon powder, CNT, titanium oxide, iron oxide, aluminum oxide, zirconium dioxide and zinc oxide.

Step 1: Centrifugal molding preparation process

The molding drum 20 provided in the preparation process of the centrifugal molding machine 10 is divided in half and the filter cloth 25 is attached to each of the molding drums 20 so that the airgel slurry 54 does not come off to the outside.

The surface of the filter cloth 25 is attached with an outer circumferential surface protective cloth made of a woven fabric or a nonwoven fabric coated with an inorganic binder. The drum is again joined to a cylinder and then connected to the rotating means 13 of the centrifugal molding machine 10.

At this time, it is preferable to use inorganic fiber such as glass fiber or silica fiber as the material of the outer circumferential surface protective cloth 52, but it can also be used as ordinary fiber when used at room temperature.

Here, applying the inorganic binder to the outer circumferential surface protective cloth 52 is a means for protecting the outer circumferential surface of the product to improve the strength.

Here, if the surface of the outer circumferential surface protective cloth 52 to be bonded to the aerosol slurry 54 is buffed to form a plurality of bristles, the bonding property will be more excellent.

Second Step: Primary Centrifugal Forming Process

As described above, when the preparation for the centrifugal molding is completed in the first step, the motor 16 of the centrifugal molding machine 10 is driven to rotate the rotating means 13 and the airgel slurry supply means 14, When the gel airgel slurry 54 obtained in the slurry production process is uniformly supplied to the surface of the outer circumferential surface protective cloth 52 attached to the inner surface filter cloth 25 of the forming drum 20, The aerogel slurry 54 forms a molded article of a cylindrical pipe having a uniform thickness of 1 to 5 mm by centrifugal force.

At this time, the water contained in the airgel slurry 54 is dewatered by the high-speed rotation of the forming drum 20, and the airgel slurry 54 formed into a cylindrical shape is closely adhered to the inner surface of the forming drum 20 to maintain a cylindrical shape of uniform thickness .

Step 3: Stiffener attaching process

In the second step, which is a primary centrifugal molding step, a reinforcing material 51 made of organic or inorganic fiber mesh is attached to the inner circumferential surface of the airgel slurry 54 formed into a cylindrical shape inside the forming drum.

A method of attaching the fiber mesh as the reinforcing material 51 in a state in which the motor 16 of the centrifugal molding machine 10 is stopped and the forming drum 20 is not rotated is a method in which the reinforcing material attaching means 15 is used to superpose Or they may be attached to each other in a circumferential direction so as to overlap each other in a circumferential direction, or they may be sequentially attached in a longitudinal direction on half of the separated forming drums.
The stiffener attaching means used in this case is to carry out the process of attaching the inner surface finishing material together. In this case, the stiffener or the finishing material is gripped on the end of the elongated arm, And the specific configuration and configuration thereof will not be limited.

Fourth step: Double centrifugal molding process

When the attachment of the reinforcing material 51 made of the organic or inorganic fiber mesh is completed in the third step of attaching the reinforcing material, the motor 16 of the centrifugal molding machine 10 is operated again to rotate the rotating means 13 at a high speed The aerosol slurry 54 in the form of a gel obtained in the aerogel slurry manufacturing process is supplied to the aerosol slurry supplying means 14 via the fiberglass reinforcing material 51 is poured evenly onto the inner circumferential surface to which the airgel slurry 54 is applied by centrifugal force so as to be applied again with a uniform thickness of 1 to 5 mm.

At this time, the water contained in the aerogel slurry 54 is dewatered by the high speed rotation of the forming drum 20, and the airgel molding 50 formed into a cylindrical shape is formed into a shape in which a reinforcing material 51 made of a fiber mesh is embedded, .

The thickness of the aerogel pipe insulating material can be selected by repeating the step of attaching the reinforcing material, which is the fifth step, and the double-centrifugal forming step, which is the fourth step, according to the intended thickness of the product.

Fifth step: adhesion step of fire retardant finish

When the molding of the aerosol molding material for constituting the airgel tube heat insulating material is completed by the above-described process, the rotation of the centrifugal molding machine 10 is stopped, and the surface of the inner peripheral surface of the formed airgel molding 50 is woven or nonwoven Attach the inner circumferential surface protective cloth 53.

At this time, the method of attaching the inner circumferential surface protective cloth 53 may also be a method of attaching the inner circumferential surface protective cloth 53 in the same manner as in the step of attaching the stiffener to the outer circumferential surface of the forming drum. Alternatively, They may be sequentially attached in the longitudinal direction.

Step 6: Dehydration process

When the molding of the aerosol molding for constructing the airgel pipe heat insulating material is completed by performing the first to fifth steps in order, the motor 16 of the centrifugal molding machine 10 is operated to rotate the rotating means 13 at least 10 Minute, the water contained in the formed airgel pipe insulation is completely dehydrated.

Seventh Step: Mold Separation Process

The molding drum 20 is separated from the molding machine 10 and separated half by one when the piping heat insulating material 50, which is the dehydrated airfoil molding material 50 in the dewatering process of the sixth process, is held in a cylindrical shape, (10) is separated from the molded pipe insulation and the filter cloth (25) is also separated to prepare for the next operation.

Here, the step of separating the molded product, which is the present process, may be carried out by changing the drying and moisture removing step and the order of the eighth step.

Eighth Process: Drying and Moisture Removal Process

The microwave heating means 31 and the conveyor belt 31 are formed inside the pipe insulation material which is the airgel molding 50 separated from the molding drum 20 in the molding separation step of the seventh step and the vacuum pump 33 Into a drying chamber (30) equipped with a drying chamber (30) to completely dry and remove moisture, thereby completing a cylindrical pipe insulation.

Step 9: Piping insulation material splitting process

In the drying and moisture removing step of the eighth step, the cylindrical pipe insulation material is completely dried to remove moisture, thereby dividing the completed cylindrical pipe insulation material into two pieces in the longitudinal direction to facilitate covering the pipe.
At this time, a woven fabric or a nonwoven fabric coated with a binder may be wrapped and reinforced on the divided surfaces.

Step 10: Packaging process

In the ninth process, a pair of pipe heat insulating materials constituting a pair of the divided pipe heat insulating material dividing steps are packed together to facilitate distribution.

The piping heat insulating material of the present invention completed in the above-described process is formed by binding an airgel molding 50, which is easily broken due to poor bonding property, with a short fiber 55 and a binder, and a reinforcing material 51, And the inner circumferential surface of the inner circumferential surface protective cloth 52 and the outer circumferential surface protective cloth 53 are integrally bonded and molded to protect the inner circumferential surface protective cloth 52 and the outer circumferential surface protective cloth 53, thereby obtaining an airgel pipe insulating material having durability and impact resistance.

As a facility for carrying out the above-described process, a centrifugal molding machine 10 for molding the airgel pipe heat insulating material and a drying chamber 30 for drying and removing the airgel pipe heat insulating material, which is a molded product, must be installed.

Therefore, the centrifugal molding machine 10 includes a housing 11 having a drain hole 12 formed at the lower end thereof; Rotating means (13) rotating at a high speed by driving the motor (16) in the housing (11); A plurality of dewatering holes 21 formed on an inner circumferential surface of the rotary drum 13 so as to be detachably coupled to the rotary means 13, (20); An aerosol slurry supply means (14) for advancing in the axial direction of the forming drum (20) so as to inject airgel slurry (54) into the forming drum (20); And a filter cloth 25 attached inside the forming drum 20.

The drying chamber 30 for drying the aerogel pipe insulation formed in the centrifugal molding machine 10 includes a vacuum pump 33 for maintaining the internal pressure in vacuum; A conveyor belt 32 for raising and lowering the aerosol molding 50; And a microwave heating means (31) for heating the airgel molding (50).

INDUSTRIAL APPLICABILITY The present invention is industrially applicable, for example, by wrapping various industrial pipes and insulating them.

10: centrifugal molding machine 11: housing 12: draining
13: rotating means 14: supplying means 15: reinforcing means
16: motor 20: forming drum 21: dehydrating ball
25: filter cloth 30: vacuum chamber 31: heating means
32: conveyor belt 33: vacuum pump 50: airgel molding
51: stiffener 52: outer circumferential surface protective cloth 53: inner circumferential surface protective cloth
54: Airgel Surrey

Claims (14)

The forming drum 20 is separated in half and a filter cloth 25 is attached to the inside of each of the forming drums 20 so as to prevent the airgel slurry 54 from falling to the outside, and the surface of the filter cloth 25 is woven or nonwoven Centrifugal molding preparation step, which is a first step of attaching the outer circumferential surface protective cloth 53 to the centrifugal molding machine 10 and then joining the forming drum 20 to the rotating means 13 of the centrifugal molding machine 10 by joining the outer circumferential surface protective cloth 53 to the cylindrical drum 20 again;
The motor 16 of the centrifugal molding machine 10 is driven to rotate the rotating means 13 and the aerosol slurry supply means 14 to rotate the molding drum 20, The airgel slurry 54 in a gelled state is uniformly supplied to the surface of the outer circumferential surface protective cloth 53 attached to the inner surface filter cloth 25 of the inner surface filter cloth 25 so that the airgel slurry 54 has a uniform thickness A primary centrifugal molding process, which is a second process for molding an airgel molding 50 made of a cylindrical pipe;
The reinforcing material 51 made of organic or inorganic fiber mesh is attached to the inner circumferential surface of the airgel molding 50 which is formed in a cylindrical shape inside the forming drum 20 by the stiffener attaching means 15 in the second step of the primary centrifugal forming step A stiffener attaching step as a third step of forming a stiffener;
When the attachment of the reinforcing material 51 made of the organic or inorganic fiber mesh is completed in the third step of attaching the reinforcing material, the centrifugal molding machine 10 is operated again, and the gel aerogel slurry 54 obtained in the aerosol slurry manufacturing process is re- Is repeatedly applied to the surface of a reinforcing material (51) made of a fiber mesh attached to an airgel molding (50) primarily molded in the molding drum (20) and then applied again;
An inner surface finishing material attaching step, which is a fifth step of attaching an inner circumferential surface protective cloth 53 made of a woven fabric or nonwoven fabric to the inner circumferential surface of the formed airgel molding 50 in order to constitute the airgel pipe heat insulating material by the above process;
The motor 16 of the centrifugal molding machine 10 is operated at a high speed for at least 10 minutes in a state in which the first to fifth steps are sequentially performed and molded so that the water contained in the formed airgel pipe heat insulating material is completely dewatered 6 dehydration process;
Which is a seventh step of separating the molding drum 20 from the piping insulating material which is the airgel molding 50 formed by dewatering in the dewatering step of the sixth step and preparing for the next operation;
The piping heat insulating material, which is the airgel formed product 50 separated from the molding drum 20 in the molding separation step of the seventh step, is put into the drying chamber 30 having the microwave heating means 31 therein to completely dry the moisture A drying and moisture removing step,
A piping heat insulating material dividing step, which is a ninth step of dividing the completed cylindrical piping heat insulating material into two pieces in the longitudinal direction and making it easy to cover the piping by completely drying in the drying and moisture removing step of the eighth step;
Which is a tenth step of commercializing the piping so as to facilitate the distribution of the piping heat insulating materials constituting one set of the two divided piping heat insulating material dividing steps of the ninth step of manufacturing the centrifugal forming airgel piping heat insulating material . The method according to claim 1,
A centrifugal molding preparation step as the first step, a primary centrifugal molding step as a second step, a stiffener attaching step as a third step, a duplicated centrifugal molding step as a fourth step, an inner surface finishing material attaching step as a fifth step , A dehydration process as a sixth process, a molded product separation process as a seventh process, a drying and moisture removing process as an eighth process, a piping heat insulating material dividing process as a ninth process, and a packing process as a tenth process A cylindrical forming drum 20 constituted of two semicylinders and formed of a single cylinder at the time of coupling so that a plurality of dewatering holes 21 are formed and dehydrated before the piping heat insulating material manufacturing process is performed; A centrifugal molding machine 10 constituting an aerosol slurry supply means 14 and a rotating means 13 that rotates at a high speed and advances in the axial direction of the drum so as to inject the aerosol slurry 54 into the interior of the building drum, Preparation of centrifugal molding machine to be equipped Jung;
Short fibers composed of an airgel powder and a binder, a water-soluble resin, a wetting agent, a surfactant, and fibers cut into 3 to 10 mm are mixed with an agitator, and additives for controlling the strength are added and mixed. Water is added while stirring to prepare a gel state. Wherein the step of forming the slurry (54) further comprises a step of producing an aerogel slurry, which is a process of forming the slurry (54). The method according to claim 1,
An outer circumferential surface protective cloth 52 made of a woven or nonwoven fabric adhered to the surface of the filter cloth 25 by attaching the filter cloth 25 so that the airgel slurry 54 is not released to the outside during the centrifugal molding preparation process, The inner circumferential surface protective cloth 53 made of a woven fabric or nonwoven fabric adhered to the inner circumferential surface of the airgel molding to form the aerogel pipe insulating material in the inner surface finishing material attaching step of the fifth step is buffered on the surface bonded to the airgel, And an inorganic binder is applied to the surface of the airgel pipe insulating material. A centrifugal molding process, a centrifugal molding machine preparation process, an aerosol slurry production process, a centrifugal molding preparation process as a first process, a primary centrifugal molding process as a second process, a stiffener adhering process as a third process, A step of dividing the pipe insulation material as a ninth step, a step of dividing the pipe insulation material as the ninth step, And the packaging step of the tenth step are sequentially carried out so that the airgel molding 50 is bound with the short fibers 55 and a binder and a reinforcing material 51 made of a fiber mesh is contained in the airgel molding 50. The outer peripheral surface and the inner peripheral surface, Wherein the protective foil (52) and the inner circumferential surface protective foil (53) are integrally formed by adhesive bonding so as to be protected. 3. The method of claim 2,
In the aerogel slurry production process, the strength of the centrifugally formed aerogel pipe insulation material is controlled by mixing the natural inorganic materials such as perlite, pearlite, gypsum, talc, wobble, cement, and synthetic inorganic materials such as bubble silica. Way. 3. The method of claim 2,
The aerosol slurry 54 obtained in the aerosol slurry production process may contain any one of carbon powder, CNT, titanium oxide, iron oxide, aluminum oxide, zirconium dioxide, and zinc oxide as an IR opacifying agent so as to have a function of blocking radiation heat as a whole Or a mixture thereof is added in an amount of 10 to 50 parts by weight. A centrifugal molding machine 10 for forming an airgel pipe heat insulating material and a drying chamber 30 for drying and removing the airgel pipe insulating material as a molded product,
The centrifugal molding machine (10) includes a housing (11) having a drain hole (12) formed at a lower end thereof; Rotating means (13) rotating at a high speed by driving the motor (16) in the housing (11); A plurality of dewatering holes 21 formed on an inner circumferential surface of the rotary drum 13 so as to be detachably coupled to the rotary means 13, (20); An aerosol slurry supply means (14) for advancing in the axial direction of the forming drum (20) so as to inject airgel slurry (54) into the forming drum (20); And stiffener attaching means for attaching the stiffener 51 and the protective cloths 52, 53 to the inside of the forming drum 20,
The drying chamber 30 for drying the aerogel pipe insulating material formed in the centrifugal molding machine 10 includes a vacuum pump 33 for maintaining the internal pressure in vacuum; A conveyor belt 32 for raising and lowering the aerosol molding 50; And a microwave heating means (31) for heating the formed airgel product (50). delete delete 50 to 90 parts by weight of an airgel powder composed of one or a mixture of silica, carbon, alumina silica, titania silica and composite metal silica, 10 to 20 parts by weight of a binder of any one of an organic binder and an inorganic binder, 5 to 10 parts by weight of short fibers (55) formed by cutting any one of natural fibers, synthetic fibers, organic fibers and inorganic fibers are added to and mixed with 1 to 5 parts by weight of an activator, And forming an aerosol slurry (54) so that the aerosol slurry (54) becomes a gel state while stirring the aerosol slurry (54). 11. The method of claim 10,
10 to 50 parts by weight of a synthetic inorganic material such as natural mineral, synthetic silica and bubble silica, which are pereneum, pearlite, gypsum, talc, bevel and cement, are added to the aerosol slurry, Aerogel slurry composition for manufacturing insulating airgel pipe insulation. 11. The method of claim 10,
10 to 50 parts by weight of any one of carbon powder, CNT, titanium oxide, iron oxide, aluminum oxide, zirconium dioxide and zinc oxide as a IR opacifying agent, or a mixture thereof, is added to the aerosol slurry thus prepared to block the total radiant heat Wherein the airgel slurry composition for centrifugally forming an aerogels piping heat insulating material is obtained. 11. The method of claim 10,
Wherein the binder is formed by mixing any one of inorganic binders such as modified silicate, silica sol, TMOS, TEOS, and lithium silicate or a mixture thereof. 11. The method of claim 10,
The binder may be any one of organic or aqueous binders composed of natural latex, starch and chitosan mixed with water, water-soluble acrylic resin, water-soluble epoxy resin, water-soluble urethane resin, water-soluble fluorine resin, synthetic latex synthetic resin Or a mixture thereof. The airgel slurry composition for manufacturing a centrifugal-shaped airgel pipe insulation according to claim 1,

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