JPH1130391A - External protection structure of piping for high temperature fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge a water and dew condensation water infiltrated inside easily by installing a heat resistant sheet member so as to cover the outer periphery of a wire lath after winding the wire lath on the outer periphery of a pipe wall. SOLUTION: A wire lath 2 with a required thickness is wound on the outer periphery of a pipe wall 1. The wire lath 2 is bound by a metal wire 3. A punching metal member 4 is installed on the outer periphery of the wire lath 2. Punch holes 4a are provided on the punching metal member 4. In this case, the thing with a standard size is used to the punching metal member 4 and plural metal members are connected in response to a piping length. As a connection means, a seam hanging and the stopper by a screw and rivet and band steel are adopted in a pipe axial direction and a pile up or string put out pile up are used in a circumferential direction. By above structure, the water invaded inside and dew condensation water generated on a pipe wall surface are discharged from many holes of the punching metal member to the outside through the wire lath.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an external protection structure for a high-temperature fluid pipe for the purpose of lowering the temperature around the high-temperature fluid pipe and giving an effect of preventing burns.

[0002]

2. Description of the Related Art Conventionally, in high temperature fluid piping such as exhaust gas piping and steam piping, the pipe wall temperature is reduced as much as possible.
And, for safety such as burn prevention, for example, the outer periphery of the pipe is surrounded by a heat insulating material such as an inorganic fiber mat such as a calcium silicate cylinder or rock wool, and a metal outer plate is wound around the outer surface to provide an external protection structure. Things are used.

[0003]

The protection structure for a high-temperature fluid pipe constructed as described above is effective for suppressing heat radiation from the pipe wall and for preventing burns. For example, a small-diameter pipe or a purge-type steam pipe is used. In the case of a pipe having a large number of intermittent operations as described above, moisture that has entered the protective structure or dew water adhering to the pipe wall cannot be released to the outside, and as a result, it easily develops into corrosion of the pipe wall. Particularly, a thin wall of a tube may be damaged by corrosion.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can easily discharge water or dew condensation water that has entered the inside, thereby greatly improving the corrosion of piping and preventing burns. It is a main object of the present invention to provide an external protection structure for a high-temperature fluid pipe, which is also effective.

[0005]

According to the present invention, there is provided an external protection structure for a high-temperature fluid pipe according to the present invention, in which a wire lath having a required thickness is wound around the outer circumference of a pipe wall of the pipe, and air permeability and permeability are formed so as to cover the outer circumference of the wire lath. The gist is a configuration in which a heat-resistant sheet member having wettability is attached. As the heat-resistant sheet member having air permeability and moisture permeability constituting the present invention, a punched metal member, a heat-resistant fiber mesh member, or the like can be used.

[0006]

1 and 2 show a preferred embodiment of an external protection structure for a high-temperature fluid pipe according to the present invention. The external protection structure shown in FIG. 1 includes a wire lath 2 wound around the outer circumference of a pipe wall 1 of a pipe, and a punching metal member 4 attached so as to cover the outer circumference of the wire lath 2.

[0007]

1 and 2 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a pipe wall of a pipe. A wire lath 2 having a required thickness is wound around the outer circumference of the pipe wall 1,
It is bound by a wire 3 such as a metal wire. A perforated metal member 4 is attached to the outer periphery of the wirelass 2. 4a is a punch hole of the metal member.

Since the punching metal member 4 is of a fixed size, it is formed by connecting a plurality of metal members in accordance with the length of the pipe. As the connecting means,
In the pipe axis direction, the metal members are fixed to each other with goby hooks, screws, rivets, steel bands, etc.
Or, it is attached by means such as stringing. As the wire lath and the punching metal member, an optimum type is selected and used according to the diameter of the pipe and the internal temperature. The wire lath preferably has a thickness of 20 mm or more.

According to the above configuration, the following effects can be obtained. [1] Since the external protection structure is composed of a wire lath and a punched metal member, moisture penetrating into the inside, dew condensation water and moisture generated on the pipe wall surface pass through the wire lath through a large number of holes of the punched metal member. Since it is released to the outside, it is effective in preventing corrosion of the pipe wall. [2] Since the external protection structure can always check the pipe surface visually, maintenance and management for preventing corrosion is easy. [3] Since the contact area between the pipe wall and the wire lath is small, heat on the pipe side is not easily transmitted to the punched metal member. Further, since the punched metal member plays a role of dissipating a part of the heat from the inside, the surface temperature of the punched metal member can be kept low. Further, the wirelass forms an insulating space between the tube wall and the punched metal member. For example, when the temperature of the fluid inside the pipe is 120 to 1
At a temperature of 50 ° C., by using a wire lath having a thickness of 20 mm, the surface temperature of the punched metal member can be suppressed to 70 ° C. or less, and a protective structure having a burn preventing effect can be obtained. [4] As described above, since water does not stay inside,
Stable thermal insulation performance can be expected. [5] Since no heat insulating material is used, an external protection structure that does not generate dust is provided.

FIG. 3 shows another embodiment of the present invention. In this embodiment, a heat-resistant fiber mesh member 5 made of glass fiber, silica fiber, or the like is used instead of the punched metal member.
This is wound around the outer periphery of the wire lath 2 and bound and fixed by the wire 6. The mesh member 5 preferably has a mesh size in the range of 5 mm to 20 mm.

In the above configuration, the same effects as those of the external protection structure shown in FIGS. 1 and 2 can be obtained. In addition, the heat-resistant fiber mesh member has an advantage that it is easy to handle and can be joined by simply overlapping in the length direction of the pipe. Further, since glass fibers and silica fibers have lower thermal conductivity than metals, the use of a glass fiber mesh or a silica fiber mesh has a greater effect of preventing burns than using a punching metal.

[0012]

As described above in detail, according to the present invention, water and dew condensation water that has entered the interior can be easily discharged, so that the corrosion of the piping can be greatly improved and the effect of preventing burns can also be obtained. Thus, an external protection structure for a high-temperature fluid pipe having the following is obtained.

[Brief description of the drawings]

FIG. 1 is a partially cut front view of an external protection structure of a high-temperature fluid pipe showing one embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially cut front view of an external protection structure for a high-temperature fluid pipe showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe wall of piping 2 Wire lath 3 Wire 4 Punched metal member 4a hole 5 Heat resistant fiber mesh member 6 Wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomi Otai 5831-48 Goi, Ichihara-shi, Chiba

Claims (4)

[Claims] 1. A high-temperature fluid in which a wire lath having a required thickness is wound around the outer circumference of a pipe wall of a pipe, and a heat-resistant sheet member having air permeability and moisture permeability is attached so as to cover the outer circumference of the wire lath. External protection structure for piping. 2. The heat-resistant sheet member having air permeability and moisture permeability is a punched metal.
External protection structure for high temperature fluid piping according to item 1. 3. The high-temperature fluid pipe external protection structure according to claim 1, wherein the heat-resistant sheet member having air permeability and moisture permeability is a mesh made of heat-resistant fiber. 4. The external protection structure for a high-temperature fluid pipe according to claim 1, wherein a wire having a thickness of 20 mm or more is used.