JPH0749227Y2 - Nonmetal expansion joint material - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention can be applied to flue ducts for thermal power plants, incinerators, iron mills, ships, paper mills, inorganic fiber mills, petrochemical mills, etc. The present invention relates to a covering material for a metal expansion joint.

[0002]

2. Description of the Related Art Conventionally, as a non-metallic expansion joint covering material of the above-mentioned example, there is, for example, a structure shown in FIG. That is, the layer thickness is about 1 mm from the fluid side to the atmosphere side.
Glass cloth layer 41, a glass felt layer having a layer thickness of about 10 mm, and a PTFE (polytetrafluoroethylene, tetrafluoroethylene resin) film layer 43 having a layer thickness of about 0.21 mm.
And a covering material layer 44 made of glass cloth and having a thickness of about 0.9 mm coated on the surface on the atmosphere side with a total of four layers to form a nonmetallic expansion joint covering material.

According to this non-metallic expansion joint covering material,
The above-mentioned glass cloth layer 41 protects the glass felt layer 42 and the PTFE film layer 43 from the inside, and the above-mentioned glass felt layer 42 ensures heat insulation properties.
The film layer 43 can secure corrosion resistance and sealability, and the outer covering material layer 44 can secure heat resistance, weather resistance, and chemical resistance, and can protect the expansion joint from external damage and deterioration. Although it has advantages, it has insufficient impact resistance due to falling objects, etc., and especially when the internal fluid flowing through the fluid side in Fig. 4 is combustion gas, acid deterioration easily occurs and sufficient notch strength is obtained. However, there was a problem in that it requires attention when handling.

[0004]

DISCLOSURE OF THE INVENTION In the invention, the aramid fiber cloth layer is bonded and integrated with the inner fluid side of the outer covering material layer through the silicone rubber adhesive layer, thereby providing corrosion resistance.
Excellent silicone rubber (Silicone rubber coating
Aramid fiber optic due to its composite integration with glass cloth)
The film strength of the loss layer is secured, which allows the properties of the window to be improved.
A Wait, impact resistance, handling property, Ki de is possible to greatly improve the acid resistance and notch strength, yet the envelope material layer
It is possible to avoid the weak points of the weather resistance of ramid fiber.
It is an object of the present invention to provide a non-metallic expansion joint covering material.

[0005]

SUMMARY OF THE INVENTION The present invention is a jacket material for a non-metallic expansion joint provided with a glass cloth jacket material layer coated with silicone rubber, wherein the inner layer of the jacket material layer is It is a non-metallic expansion joint covering material in which an amide fiber cloth layer is adhered and integrated on the fluid side via a silicone rubber adhesive layer .

[0006]

According to the present invention, the inside of the above-mentioned covering material layer is
Since the aramid fiber cloth layer is bonded and integrated through the silicone rubber adhesive layer on the layer fluid side,
Due to the above-mentioned characteristics of aramid fiber (high strength, lightness, corrosion resistance, elastic modulus superior to metal), impact resistance, handleability, acid resistance and notch strength can be significantly improved. There is. This is aramid
The fiber cloth layer is made of silicone rubber with excellent corrosion resistance.
Recon rubber coating glass cloth)
This aramid fiber cloth layer by composite integration
Ru der that the film strength is achieved until it has been ensured.

[0007] In addition, the above-mentioned aramid fiber cloth layer
Since it is placed on the inner circumference side of the outer covering layer, the power generation plan
It is often used externally such as
Flexible joints, the weatherability of the aramid fiber described above
It has the effect of avoiding weaknesses inferior in sex.

Incidentally, aramid is a polyamide (polyamide) having an aromatic group such as a benzene ring in its molecular skeleton, and a para-aramid fiber whose molecule is generally linear is used.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The drawing shows a non-metallic expansion joint covering material, and FIG.
In the non-metallic expansion joint outer covering material, the outer covering material layer 1 made of glass cloth and having a layer thickness of about 0.9 mm in which the surface on the atmosphere side is coated with silicone rubber is provided on the outermost layer on the atmosphere side, A layer thickness of about 1.0 mm is provided on the fluid side of the outer cover material layer 1, that is, the inner layer side, with an adhesive layer 2 of room temperature vulcanizing type silicone rubber interposed
The aramid fiber cloth layer 3 is bonded and integrated. Here, as the above-mentioned aramid fiber cloth, specifically, a Kevlar cloth (Kevlar is an American Du P
(registered trademark of Ont Corporation) is used.

Further, the above-mentioned aramid fiber cloth layer 3
(Polytetrafluoroethylene, tetrafluoroethylene resin) film layer 4 with a layer thickness of about 0.21 mm on the fluid side of
And a glass felt layer 5 having a layer thickness of about 10 mm is formed on the fluid side of the PTFE film layer 4, and a glass cloth layer 6 having a layer thickness of about 1 mm is formed on the fluid side of the glass felt layer 5. The layers 1 to 6 of FIG.
As shown in Fig. 3, a cylindrical structure 9 having flanges 7 and 8 at both ends or a cylindrical structure 10 not having flanges 7 and 8 at both ends as shown in Fig. 3 is used to form a non-metallic expansion joint. For example, it is used as an expansion joint for a flue airway of a thermal power plant.

The jacket material for a non-metallic expansion joint having the above structure is
The glass cloth layer 6 and the glass felt layer 5 and P
The TFE film layer 4 is protected from the inside, the above-mentioned glass felt layer 5 ensures heat insulation, the above-mentioned PTFE film layer 4 ensures corrosion resistance and sealability, and the above-mentioned outer covering layer 1 has heat resistance, It has the effect of ensuring weather resistance and chemical resistance, and protecting the expansion joint from external damage and deterioration.

In addition, since the aramid fiber cloth layer 3 is integrally bonded to the fluid side of the outer covering material layer 1 through the silicone rubber adhesive layer 2, the characteristics of the aramid fiber (metal) are described. Higher strength, lighter weight,
Corrosion resistance and elastic modulus) have the effect of significantly improving impact resistance, handleability, acid resistance, and notch strength.

This means that the aramid fiber cloth layer is
Silicone rubber with excellent corrosion resistance (silicone rubber coat
(Combined with the outer coating material layer)
This ensures the film strength of this aramid fiber cloth layer.
Will be achieved for the first time. In addition, the above-mentioned Alam
The Doughiva cloth layer is placed on the inner peripheral side of the outer covering layer.
Externally, such as power plants and petroleum science plants.
In the elastic joints often used, the above-mentioned
It is possible to avoid the weak point of the poor weather resistance of the mid fiber.
There is an effect.

Therefore, for example, even if an external force is applied to a non-metallic expansion joint due to a falling object from the outside, the joint has sufficient impact resistance, and the joint is used as a flue passage for a thermal power plant. However, even when the combustion gas is circulated inside the fluid side, it is possible to sufficiently counter acid deterioration.

The following [Table 1] shows the results of comparing various performances of aramid and steel.

[0016]

[Table 1]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a jacket material for a non-metallic expansion joint of the present invention.

FIG. 2 is an explanatory diagram applied to a flare expansion joint.

FIG. 3 is an explanatory view applied to a belt type expansion joint.

FIG. 4 is a sectional view showing a conventional non-metallic expansion joint outer covering material.

[Explanation of symbols]

 1 ... Outer material layer2 ... Silicone rubber adhesive layer  3 ... Aramid fiber cloth layer

Claims (1)

[Scope of utility model registration request] 1. An outer covering material for a non-metallic expansion joint, comprising an outer covering material layer (1) made of glass cloth coated with silicone rubber, wherein the inner layer fluid side of the outer covering material layer (1). To silicone rubber
Aramid fiber cloth layer (3) through the adhesive layer (2)
Nonmetal expansion joint material that is bonded and integrated.