JPH0632899U - Refractory cooler for low temperature fluid piping and equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] In a refractory cooler for low-temperature fluid pipes and equipment, the fireproof material that covers the outside of the heat insulating material for cooling is provided with a waterproof / moisture-proof function to prevent performance deterioration of the heat insulating material. It is in. [Structure] A refractory material in which the outer periphery of a low-temperature fluid pipe 1 is covered with a heat insulating material 2 for cooling, such as polyurethane foam, and the outer periphery thereof is made of aluminum hydroxide as a main component, and an organic resin / foaming agent is added thereto to form a foam. 9, the outer periphery is further covered with the waterproof / moisture-proof material 3, and the outer surface thereof is covered with the metal exterior plate 8. [Effect] Since the refractory material 9 contains aluminum hydroxide as a main component, it has excellent fire resistance performance, and the organic resin itself has no water absorption, and since the closed cell content is high, Has hygroscopicity. Further, since the refractory material 9 is a foam, it has appropriate flexibility and is lightweight, so it is easy to handle and has good workability.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

The present invention relates to an improvement of a refractory cooler for low temperature fluid piping and equipment such as LPG, LNG, LEG, LH ₂ , LOX, and brine.

[0002]

[Prior art]

 Conventionally, for example, the one shown in FIGS. 5 and 6 is known as a refractory cooler for low-temperature fluid piping and equipment. That is, in the figure, 1 is a pipe, and as a heat insulating material 2 for cooling that directly covers the outer surface of the pipe 1, an organic foam such as hard urethane foam, polyethylene foam, phenol foam, vinyl chloride foam or An inorganic foam such as foam glass is used, and the outer periphery thereof is used as the moisture-proof material 3 in the form of aluminum, polyester composite film or a sheet of butyl rubber, rubber asphalt, polyethylene or the like, or a thin metal plate or resin such as FRP or FRV. Plates, coating materials, or rubber-based or asphalt-based coating materials are formed. 4 is a reinforcing material, 5a, 5b, 6 are joint materials

In the event of a fire around the piping, the moisture-proof material 3 and the heat insulating material 2 for cold insulation used are ignited, and the purpose of preventing a sudden heat input to the inside of the piping is to prevent it. A refractory material 7 is coated on the outer periphery of the wet material 3. This refractory material 7 should be effective for a relatively short period of time from the occurrence of a fire to the initial extinction, that is, a flame of about 30 minutes of fire resistance shown in the fire resistance test method of JAS A 1304 building structure. For this reason, asbestos boards with a thickness of 2 to 10 mm, asbestos-free mill board, glass wool felt, alumina silica fiber felt, vermiculite sprayed glass wool felt, etc. are used. The refractory material 7 is formed in several layers, the outer side of which is covered with a metal exterior material 8, and the odd-shaped portion is coated with a coating material in which vermiculite and cement are mixed.

[0004]

[Problems to be solved by the device]

 However, the refractory cooler having the above structure has three problems. One is that the conventional refractory material 7 is generally porous, and the thermal conductivity of the refractory material itself is small, so that the temperature of the outer surface of the heat insulating material 2 for cooling is lowered, and the refractory material 7 and the heat insulating material for cooling are cooled. When the interface temperature with 2 falls below the dew-point temperature, moisture in the air easily permeates the refractory material 7 and causes dew condensation on the surface of the moisture-proof material 3, causing the refractory material 7 to absorb water. . In addition, the refractory material 7 absorbs rainwater that has entered from the joints of the exterior material 8, and the surroundings of the heat insulation material 2 for cold insulation always create a moist atmosphere, and the moistureproof material 3 and the heat insulation material 2 for cold insulation are shortened. There is a problem that it deteriorates with time. Furthermore, in terms of workability, the refractory material itself has a large specific gravity and the refractory material itself is hard, so it is difficult to install it on pipes with a small diameter, and the size of the refractory material is small, resulting in poor workability. Is a problem.

[0005]

[The purpose of the device]

 The present invention has been made in order to solve all the above-mentioned problems of the conventional refractory refrigerating equipment, and does not cause a problem such as water absorption of the refractory material, and has excellent fireproofing performance and at the same time the cooling material. It is an object of the present invention to provide a refractory refrigerating device capable of exhibiting the above-mentioned performance and capable of greatly improving and improving the workability.

[0006]

[Means for Solving the Problems]

 According to the present invention, a heat insulating material made of an organic foaming resin that covers the outside of pipes and equipment, and aluminum hydroxide as a main component, is foam-molded by adding an organic resin and a foaming agent. The gist of the present invention is that it is composed of a refractory material to be covered, a waterproof / moisture-proof material that covers the outside of the refractory material, and a metal exterior material that covers the outside of the waterproof / moisture-proof material.

[0007]

[Action]

 Since the above refractory material is mainly composed of aluminum hydroxide, it has excellent fire resistance, and because the organic resin itself has no water absorption and the closed cell content is high, it has excellent water and moisture absorption resistance. Have both. In addition, since the refractory material is a foam, it has appropriate flexibility and is lightweight, so it is easy to handle and has good workability.

[0008]

【Example】

 1 and 2 show an embodiment of the present invention. The same or similar members as those in FIGS. 5 and 6 are designated by the same reference numerals. In the figure, 1 is piping, 2 is a heat insulating material for cold insulation made of rigid urethane foam, polystyrene foam, polyolefin foam, organic resin foam such as phenol foam, and 4 is a reinforcing material such as glass cloth. The refractory material 9 for covering the outer circumference of the heat insulating material 2 for cold insulation is formed by adding inorganic fibers such as rock wool and glass wool, vinyl chloride resin as a binder, and a foaming agent to aluminum hydroxide (5 to 80% by weight). It is foamed and molded into a roll having a thickness of 5 to 50 mm. Reference numeral 3 is a moistureproof material obtained by laminating an aluminum foil and a polyester film, and the moistureproof material 3 is adhered to the outer surface of the refractory material 9 with an adhesive.

In the illustrated example, the heat insulating material 2 for cold storage is formed into a semi-cylindrical shape, and after wrapping the pipe with this, it is tightly bound with a steel wire or band steel (not shown). The joints in the circumferential direction and the longitudinal direction of the semi-cylindrical cylindrical heat insulating material 2 are filled with an oily joint sealer, an adhesive or the like, or are filled with a rigid urethane foam to form joint materials 5a and 5b. Further, a moisture-proof tape 6 such as butyl rubber is attached to the joint portion as a moisture-proof treatment. The outer periphery of the refractory material 9 is covered with an exterior material 8 using a zinc-plated iron plate, a colored zinc-plated iron plate, an aluminum plate, a stainless plate, or the like.

Note that the heat insulating material 2 for cold insulation may be formed by injection foaming by using a mold assembled on the outer circumference of the pipe. When the heat insulating material 2 is formed as a molded body, the fire resistant material 9 is preferably integrated with an adhesive, but it is set in a heat insulating material molding die and the urethane foam stock solution or the like to be the heat insulating material is injected and foamed. By doing so, they can be integrated.

Depending on the refractory cooler having the above-mentioned structure, when the refractory material 9 is exposed to a high temperature, the crystal water of aluminum hydroxide contained therein evaporates, and the temperature rise is suppressed by the latent heat. It has the characteristic that This is a conventional product (FIGS. 5 and 6) in a fire resistance test, in which the fire resistance cold storage device is exposed to the fire resistance test device shown in FIGS. 3 and 4 as a test sample A at a fire temperature of 900 ° C. for 60 minutes. It has been confirmed that the product has the same fire resistance as that of the product). In FIGS. 3 and 4, 10 is a refractory wall, 11 is a combustion gas supply pipe, 12 is a ring burner, and 13 is a blocker of refractory fiber.

In addition, since the refractory material 9 does not absorb water in the organic resin itself and has a high closed cell content, it has both water absorption and moisture absorption resistance, and prevents deterioration of the heat insulating material 2 for cold insulation. Plays the role of.

Further, if the refractory material 9 and the heat insulating material 2 for cold insulation are integrated, the refractory material 9 can be attached at the same time when the heat insulating material 2 is attached, so that significant labor saving is possible. Further, if the moistureproof material 3 is provided on the outer side of the refractory material 9, there is an effect that water absorption of the refractory material can be prevented in advance, and as a result, it can contribute to prevention of deterioration of the heat insulating material for cold insulation.

Further, compared to the conventional refractory material, the refractory material 9 has a thermal conductivity of half or less, and since it also functions as a refrigerating material at the same time as the refractory material, the refractory material has almost the same refrigerating performance as the conventional refractory material. The outer diameter can be used, and there is no need to change the design such as the arrangement of pipes. Also, in terms of manufacturing, since the refractory material itself is flexible, it is easy to install the heat insulation material for cold insulation on the foaming mold, and the secondary processing for forming the refractory material into the shape of the mold is performed. You can save time.

The present invention is not limited to the above-mentioned low-temperature fluid pipe, but can be applied to a low-temperature fluid storage tank or the like, and in that case, the same effect as above can be obtained.

[0016]

[Effect of device]

 As described above, according to the present invention, a refractory material is formed on the outside of a cold insulation material to provide a refractory cold insulation structure, wherein the refractory material contains aluminum hydroxide as a main component and an organic resin. -Because it uses a foamed product with a foaming agent added, it has excellent fire resistance and waterproof / moisture proof performance, which is remarkable for preventing deterioration of the heat insulating material for cold insulation and significantly reducing labor for fire and cold insulation. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a refractory cooler for low temperature fluid piping showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is a front view of a fire resistance tester.

FIG. 4 is a side view of FIG.

FIG. 5 is a cross-sectional view of a conventional refractory refrigerating machine for cryogenic fluid piping.

6 is a cross-sectional view of FIG.

[Explanation of symbols]

 1 Piping 2 Cooling Insulation Material 3 Waterproof / Moisture Proofing Material 4 Reinforcing Material 5a, 5b Joint Material 6 Moisture Proof Tape 7 Fireproof Material 8 Exterior Material 9 Fireproof Material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Konosuke Kato 3-6-10-406 Hirado, Totsuka-ku, Yokohama-shi, Kanagawa

Claims (1)

[Scope of utility model registration request] 1. A heat insulating material made of an organic foaming resin for coating the outside of piping / equipment, and aluminum hydroxide as a main component, and an organic resin and a foaming agent are added to form a foam to cover the outside of the heat insulating material. Low temperature fluid pipe / equipment heat and cold insulation of a low temperature fluid pipe / equipment, characterized by comprising a refractory material, a waterproof / moisture-proof material covering the outside of the refractory material, and a metal exterior material covering the outside of the waterproof / moisture-proof material. apparatus.