JPH034074A - Butterfly valve - Google Patents

Abstract

PURPOSE:To prevent a shellfish from its adhering growth in a lining part by mixing a copper dust or bronze dust in the rubber lining part of a valve unit and a valve seat. CONSTITUTION:Hardened rubber lining parts 1a, 12a, 13a, in which lining of rubber material mixed with copper dust or bronze dust and the like is applied, are provided in the internal surface of a circulation hole 11 in a valve case 1 and in the surface of a valve seat 12 and a valve unit 13. Accordingly, by impeding the adhering growth of a shellfish to the surface of the valve unit and the valve seat, a function as a valve can be prevented from deteriorating.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a butterfly valve.

Conventional technology FIG. 3 is a maFi side view of a conventional butterfly valve.

As shown in FIG. 3, conventional butterfly valves pass through a valve body 1 and an annular rubber lining valve seat 2 located on the inner surface of the flow hole of the valve body 1, and insert a pair of valve stems 3 and 4 into the flow hole. The valve stems 3 and 4 are tightly fitted into the shaft holes 6 and 7 of a circular valve body 5 whose surface is rubber-lined, and as the valve stem 3 rotates, the valve body 5 is configured to rotate.

The operation of the above configuration will be explained below.

As shown in FIG. 3, when the valve is closed, the outer circumferential edge of the rubber lining portion 5a of the valve body 5 is in close contact with the inner circumference of the valve seat 2, and at this time, the fluid in the flow hole is Not flowing. When the valve stem 3 is rotated 90° from this closed state, the valve body 5 also rotates with the rotation of the valve stem 3, and the side surface 5b of the valve body 5 is shown by a chain line.
The flow hole is open so that the flow hole faces the flow hole, and the fluid flows. Furthermore, when the valve stem 3 is rotated 90' in the opposite direction from this valve open state and the valve body 5 is returned to its original position, the communication hole will be in the closed state again.

Problems to be Solved by the Invention In the conventional configuration described above, in an all-rubber lining type butterfly valve, when the fluid flowing through the flow hole is full of water, the rubber lining portion 2a provided on the surface of the valve seat 2 and the valve body 5 , shellfish etc. may adhere to and grow on the valve body 5a, which not only impairs the adhesion between the outer peripheral edge of the valve body 5 and the valve seat 2, but also damages the valve seat 2 and the rubber lining parts 2a and 5a of the valve body 5. This has caused the problem that the function as a butterfly valve is impaired.

The present invention is intended to solve the above-mentioned conventional problems, and aims to provide a butterfly valve that does not allow shellfish to attach and grow, and whose function as a valve is not impaired.

Above 5 ways to solve the problem! In order to solve the problem, the butterfly valve of the present invention has the following features:
Inside the flow hole of the valve box! 1. A valve having a rubber-lined valve seat provided near the rubber-lined valve seat and a valve body that is movable towards and away from the rubber-lined valve seat and whose surface is rubber-lined, the valve body and the valve seat having the following: The rubber lining of the rubber lining contains copper powder or bronze powder.

Effect With the above structure, since shellfish generally dislike copper ions, the copper powder or bronze powder contained in the rubber lining of the valve body and valve seat prevents shellfish from adhering and growing on the surfaces of the rubber lining of the valve body and valve seat. This allows the valve body to move smoothly toward and away from the rubber-lined valve seat, and when the valve body is closed, the outer periphery of the valve body is in close contact with the valve seat, preventing fluid from the flow hole. is reliably closed, and furthermore, the valve body and the rubber lining of the valve seat are prevented from collapsing. In this way, the valve function is prevented from being impaired.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 are a vertical cross-sectional view and a cross-sectional view of a butterfly valve showing an embodiment of the present invention, and parts having the same functions and effects as the conventional example are given the same reference numerals and will be explained. omitted. 1 and 2, in place of the conventional hard rubber lining part, an annular valve seat 12 is formed on the inner surface of the flow hole 11 of the valve body 1 and an annular valve seat 12 is formed on this inner surface.
The hardened rubber lining parts 1a, 12a, 13a are lined with a rubber material mixed with Cu (copper) powder, bronze powder, etc. as part of the hardening agent for the hard rubber lining on the surface of the valve body 13 provided inside the hard rubber lining. We have set up.

The operation of the above configuration will be explained below.

In general, shellfish dislike Q u 2 m) ions, so each rubber lining part 1a, 12a is coated with Cu powder, etc. contained in the hard rubber lining parts 1a, 12a, 13a.

Adhesion and growth of shellfish on the surface of 13a is prevented.

In this way, there are no shellfish attached, so Figures 1 and 2
As shown in the figure, the valve body 13 can be smoothly rotated by 90° together with the valve stem 3 from the closed state of the valve body 13 of the flow hole 11 to the open state, and at this time, the outer peripheral edge of the valve body 13 The valve body 13 is spaced apart from the valve seat 12, and the valve body 13 is in the position of the valve body 13b shown by the rectangular line, so that the side surface of the valve body 13 faces the flow hole, and seawater flows. Furthermore, if the valve stem 3 is reversed 90 degrees and returned to its original position, there will be no shellfish attached to the valve body 1.
The outer peripheral edge of the rubber lining portion 13a of No. 3 and the valve seat 12 can be evenly pressed and brought into close contact, and the flow of seawater in the flow hole 11 can be reliably closed, and the valve seat 12 and the valve body 13 rubber lining parts 12a, 13a
will no longer be damaged. In this way, the function as a valve will not be impaired.

In this example, Cu powder or bronze powder was mixed into the hard rubber lining material used to line the valve seat and valve body of the butterfly valve, but it can also be applied to other rubber lining materials to encourage attachment and growth of shellfish. Needless to say, it can be prevented.

Effect of light As described above, according to the present invention, by using a rubber material mixed with copper powder or bronze powder for the rubber lining portion of the valve body and valve seat, it is possible to prevent shellfish from attaching to the surfaces of the valve body and valve seat. Nursing care can be prevented, and the function as a valve can be prevented from being impaired.

[Brief explanation of drawings]

1 and 2 are a longitudinal sectional view and a transverse sectional view of a butterfly valve showing an embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of a conventional butterfly valve. DESCRIPTION OF SYMBOLS 1...Valve box, 1a, 12a, 13a...Rubber lining part, 11...Flow hole, 12...Valve seat, 13...Valve body.

Claims (1)

[Claims] 1. A valve having a rubber-lined valve seat attached to the inner surface of a flow hole of a valve box, and a valve body that is provided near the rubber-lined valve seat and can move toward and away from the rubber-lined valve seat, and whose surface is rubber-lined. A butterfly valve characterized in that copper powder or bronze powder is mixed into the rubber lining portion of the valve body and valve seat.