JPS6347341Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a heat insulating support device for cryogenic fluid transport piping.

Conventionally, in low-temperature fluid transport piping, a low-temperature insulation device is installed by attaching low-temperature insulation material, moisture-proofing material, exterior material, etc. to the outer peripheral surface of the pipe made of low-temperature-resistant metal materials such as stainless steel. Further, heat insulating support devices for supporting these are arranged along the pipe line at required intervals. Cryogenic fluid transport piping expands and contracts based on temperature changes, and in this case, the insulating support device needs to move with the piping.
Therefore, conventionally, in this heat insulating support device, a heat insulating support made of a material having both heat insulating properties and compression resistance, such as high-density foamed synthetic resin, is fixed to the pipe using a fixing means such as adhesive.

However, since the thermal expansion coefficients of the insulating support and the piping body are significantly different, when the cryogenic fluid transport piping is used and exposed to low temperatures, large thermal stress due to the difference in thermal expansion coefficient will occur at the joint between the two. Therefore, there are disadvantages such as the occurrence of phenomena such as separation of the heat insulating support from the piping or cracking of the heat insulating support, which has a lower strength than the pipe, resulting in loss of its original function. In order to solve these drawbacks, methods have been devised to fix the locking member to the pipe using means such as welding, and thereby fix the heat insulating support member to the pipe. The device takes time and effort to form, significantly increasing the construction period and cost, and has serious drawbacks such as increased heat intrusion from the locking member and reduced heat insulation.

This invention was made in order to eliminate all of the above-mentioned drawbacks. In a low-temperature heat insulating support device located and supported on a pedestal arranged along
A heat insulating support body integrally formed with an elastic covering material made of a room temperature curing elastomer composition having an elongation of The elastic covering material with good elongation properties absorbs the thermal stress caused by the difference in coefficient of thermal expansion between the piping and the heat-insulating support, thereby preventing harmful phenomena when used in low-temperature ranges. This is designed to prevent this from occurring.

Next, this invention will be explained in detail based on the accompanying drawings showing the embodiments thereof.

In FIG. 1, reference numeral 1 denotes a heat insulating support device arranged at a required interval along the pipe line of the low-temperature fluid transport piping, and is slidably placed at a required position on a pedestal 2. . That is, the heat insulating support 4 that supports the piping 3 is configured to slide on the pedestal 2 in conjunction with the displacement of the piping due to changes in the temperature of the piping.

The other outer peripheral surface of the pipe 3 is coated with low-temperature insulation material, moisture-proof material,
A low-temperature insulation device 5 made of an exterior material or the like is attached. Note that between the pedestal 2 and the heat insulating support 4, a sheet-shaped sliding material 7 having both a low coefficient of friction and compression resistance is applied with adhesive and set screws in grooves provided at predetermined positions of the corrosion-resistant metal plate 6. The sliding plate 8, which is formed by embedding it with or without using a
It may be attached using means such as welding, set screws, or adhesive. By doing this, the frictional resistance at the contact surface between the pedestal 2 and the heat insulating support 4 can be significantly reduced, so when the pipe is displaced due to temperature changes, the friction between the pipe 3 and the heat insulating support 4 can be The stress applied to the joint can be significantly reduced. Therefore, this is particularly effective in large-diameter pipes that are heavy.

The heat insulating support member 4 has an elastic support member 9 formed on the upper surface of the heat insulating support member 9, which is made of a high-density foamed synthetic resin with excellent heat insulation properties and compression resistance, in an arcuate recess so as to be able to hold and support the piping 3. The structure is such that the covering material 10 is integrally formed, and a sliding member 11 is provided on the bottom surface of the heat insulating support member 9, or on a part of the bottom surface and side surfaces.

The sliding member 11 is made of a corrosion-resistant metal material such as stainless steel and formed into a flat plate shape, a gutter shape, or a box shape. 12
fixed either alone or in combination. Further, the sliding material 11 may be attached using the self-adhesive force when the heat insulating support member 9 is foam-molded.

The heat insulating support member 9 is formed by cutting a block material of high-density foamed synthetic resin into a desired shape, or by foam-molding a foamed synthetic resin in a mold having the desired shape. The high-density foamed synthetic resin may be composited into an integral structure with a known reinforcing material such as glass cloth by utilizing the self-adhesive force during foam molding. By doing so, the strength of the foamed synthetic resin can be improved, its density can be reduced, and the heat insulation properties and economic efficiency can be improved.

The elastic covering material 10 used has an elongation of 30 to 1000%, preferably 70 to 700%, as determined by the JIS K6301 test. If it is less than 30%, the effect will be low, and if it is more than 1000%, the strength at room temperature will be low, causing practical difficulties. The elastic covering material 10 is a composition whose main component is a cold-setting elastomer such as polyurethane, liquid rubber, or chloroprene rubber. All of these elastic coating materials are liquid before curing.
When applied to the recesses on the upper surface of the heat insulating support member 9 using a known means such as a brush, roller, trowel, or applicator, a curing reaction progresses and it no longer takes on a liquid state. The two can be integrated very easily without any effort.
The thickness of the elastic coating material is determined depending on the physical properties of the elastic coating material to be used and the operating temperature of the pipe, but is usually 1 mm to 5 mm. Also,
The elastic dressing 10 may be composited with a reinforcing material, such as a glass cloth, which is permeable to the starting liquid composition.

As described above, according to this invention, an elastic coating made of a room temperature curing elastomer composition having an elongation of 30 to 1000% is integrally formed on the piping support surface of the heat insulating support member, and this elastic coating is Since the structure is such that the material is bonded to the pipe, the thermal stress generated at the joint between the pipe and the heat insulating support member due to the difference in coefficient of thermal expansion is absorbed by the elastic covering material, and the It is possible to obtain a heat insulating support device for cryogenic fluid transport piping that can reliably prevent the occurrence of peeling or destruction of the heat insulating support member.

In addition, according to this invention, it is very easy to manufacture the heat insulating support, and furthermore, when forming the heat insulating support device, the pipe and the heat insulating support can be joined using adhesive, so it is possible to No skill is required, and therefore quality control in manufacturing the heat insulating support and forming the heat insulating support device is easy, and the heat insulating support device is highly reliable in terms of quality and is highly economical, making it suitable for industrial use. The value is extremely great.

[Brief description of the drawings]

Figure 1 is a partially cutaway perspective view of a heat insulating device for cryogenic fluid transport piping showing an embodiment of this invention, Figure 2 is a vertical sectional view of a sliding plate, and Figure 3 is a partially cutaway view of a heat insulating support. FIG. In the drawing, 1 is a heat insulation support device, 2 is a frame, 3 is a piping body, 4 is a heat insulation support, 5 is a low temperature insulation device, 8
9 is a sliding plate, 9 is a heat insulation support member,
10 is an elastic covering material, and 11 is a sliding member.

Claims (1)

[Scope of utility model registration request] A low-temperature insulation support device that supports a low-temperature fluid transport piping equipped with a low-temperature insulation device made of a low-temperature insulation material, a moisture-proofing material, an exterior material, etc. on a frame disposed along the piping, The heat insulating support is formed by integrally forming an elastic covering material made of a room temperature curing elastomer composition having an elongation of 30 to 1000% on the piping support concave surface of a heat insulating support member made of a high-density foamed synthetic resin. A heat insulating support device for low temperature fluid transport piping, characterized in that it is disposed in a part of a heat insulating device that is cut out, and the elastic covering material is adhered to the pipe.