JPH0914477A - Valve protection cover - Google Patents

Abstract

PURPOSE: To prevent a deformation and generation of rust by forming and valve protection cover which prevents corrosion due to water drops of an acrylic mesh, an extended porous polytetrafluoroethyrene film and an acrylic fiber in a laminated layer, and thereby discharging moisture and heat to the outside. CONSTITUTION: A protection cover 4 which covers a valve so as to prevent corrosion due to water drops is prepared by laminating an acrylic mesh 1, an extended porous polytetrafluoroethyrene film 2, and an acrylic fiber 3, and uniting them through sewing. The mesh 1 is provided for preventing damage of the film 2. The film 2 is provided for discharging moisture and heat to the outside. The acrylic fiber 3 is provided for protecting the film 2 from damage due to contact with outer substance and drops or the like. In the protection cover 4, an upper end of a cylindrical part 41 and a part of a cover 42 is connected to each other through a connection piece 43, while remaining part is connected through a fastener 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applied to a valve,
The present invention relates to a valve protection cover for protecting a valve from raindrops or the like.

[0002]

2. Description of the Related Art Valves such as manual valves used outdoors, such as thermal power plants, are designed to prevent corrosion caused by raindrops.
A protective cover used over the valve is used. As the protective cover, a galvanized steel plate, an aluminum plate, or a vinyl film is used.

[0003]

In this prior art, even though the infiltration of raindrops can be prevented, the internal moisture is not released to the outside, so that the inside is in a high humidity state, and the dew condensation on the valve or the like occurs. However, there is a problem that the internal environment may deteriorate, such as rusting. In addition, there is a problem that early detection of an abnormal state is hindered because hot air (high-temperature steam leakage) at the time of an internal accident is not released to the outside.

The present invention has been made for the purpose of solving such problems of the prior art.

[0005]

Means for solving the above problems will be described below with reference to FIG. 1 corresponding to the embodiment. This invention includes an acrylic mesh 1, a stretched porous polytetrafluoroethylene film 2 and an acrylic fiber 3.
It is formed of a laminated body of.

[0006]

In this structure, the stretched porous polytetrafluoroethylene film 2 and the acrylic fibers allow the internal moisture and hot air to be released to the outside.

[0007]

FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, 1 is an acrylic mesh, 2 is an expanded porous polytetrafluoroethylene film, and 3 is an acrylic fiber.

The acrylic mesh 1 is in the lower layer,
This is to prevent damage to the stretched porous polytetrafluoroethylene film 2 by contacting the valve. The mesh is used to ensure air permeability. Acrylic is used because it has excellent flame retardancy, heat resistance, and chemical resistance, so that it can be used for high-temperature steam-based valves in thermal power plants and the like.

[0009] The stretched porous polytetrafluoroethylene film 2 is located in the intermediate layer and releases internal moisture and hot air to the outside. Stretched porous polytetrafluoroethylene (registered name: Gore-Tex) has a fine continuous porous structure, and emits moisture and hot air to the outside. Also, it has excellent water repellency and has zero water absorption. It is also better than vinyl in heat resistance and chemical resistance.

The acrylic fiber 3 is on the surface layer and protects the stretched porous polytetrafluoroethylene film 2 from damage caused by raindrops or contact with the outside. Moisture and hot air that have passed through the stretched porous polytetrafluoroethylene film 2 are released to the outside through the acrylic fibers 3. The acrylic fiber 3 is subjected to a water-repellent treatment to prevent water absorption and penetration. The acrylic fiber 3 on the surface can be used in various colors according to the function and use of the valve.

The acrylic mesh 1, the expanded porous polytetrafluoroethylene film 2 and the acrylic fibers 3
They are laminated and sewn together to form one piece.

The protective cover 4 is, as shown in FIGS.
It is composed of a cylindrical part 41 and a lid part 42. Cylindrical part 4
A part of the upper end of 1 and the lid 42 are connected via a connecting piece 43, and the remaining part is connected via a fastener 44. Both ends of the fastener 44 are fixed to the connecting piece 43. The fastener 44 is made of plastic because it is used outdoors. In order to prevent raindrops from entering the inside from the fasteners 44, a raindrop intrusion prevention cover 45 is provided around the cover 42 and sewn. The raindrop infiltration prevention cover 45 is formed by laminating water-repellent acrylic fibers. In order to fix the protective cover 4, a fastening belt 47 is provided around the lower portion of the cylindrical portion via a fastening belt support 46. The tightening belt 47 fixes the protective cover 4 to the valve, but instead of the tightening belt 47, it is suspended from the lower portion of the cylindrical portion 41 to fix the protective cover 4 to the pipe. A belt may be provided.

The protective cover 4 is mounted by covering the valve body and then tightening the tightening belt 47. Therefore, the attachment of the protective cover 4 is easy.

The valve is operated by opening the lid 42 by operating the fastener 44. Therefore, the protective cover 4
It is not necessary to remove the valve, and the valve operation is easy. Further, since the valve itself can be easily visually observed and grasped by opening the lid portion 42, the inspection of an abnormal state such as a steam leak can be easily and quickly performed.

[0015]

As described above, the present invention provides:
It is formed of a laminate of an acrylic mesh, a stretched porous polytetrafluoroethylene film and an acrylic fiber. Therefore, the internal moisture and hot air are released to the outside. Therefore, according to the present invention, it is possible to obtain an effect that dew condensation of a valve or the like due to a high humidity condition, environmental deterioration such as rusting, etc. are eliminated, and an early detection of an abnormal condition is easy.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line AA of FIG. 2 showing one embodiment of the present invention.

FIG. 2 is a perspective view showing the embodiment of the present invention in a state where a lid is closed.

FIG. 3 is a perspective view showing an embodiment of the present invention in a state where a lid is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Acrylic mesh 2 Stretched porous polytetrafluoroethylene film 3 Acrylic fiber 4 Protective cover 41 Cylindrical part 42 Lid part 44 Fastener 45 Raindrop infiltration prevention cover

Claims (4)

[Claims] 1. A valve protective cover formed of a laminate of an acrylic mesh, a stretched porous polytetrafluoroethylene film and an acrylic fiber. 2. A valve protective cover which is formed of a laminate of an acrylic mesh, a stretched porous polytetrafluoroethylene film and an acrylic fiber, and in which the upper end of the cylindrical portion and the lid portion are connected via a fastener. 3. A valve protection cover which is formed of a laminated body of an acrylic mesh, a stretched porous polytetrafluoroethylene film and an acrylic fiber, and a fastening belt is provided around a lower portion of a cylindrical portion. 4. A laminate formed of an acrylic mesh, a stretched porous polytetrafluoroethylene film and acrylic fibers, wherein the upper end of the cylindrical portion and the lid are connected via a fastener, and a tightening belt is provided. Valve protection cover around the bottom of the cylinder