JPH0544895A - Float valve - Google Patents

Abstract

PURPOSE:To obtain a float valve which can be used again without disassembling even when a valve seat face of a valve port of a valve seat member is abraded. CONSTITUTION:A plurality of valve ports 15 to 18 with the same opening area are provided at a spherical valve seat member 11. A valve stem 20 for rotary operation is connected to the spherical valve seat member 11. When a valve seat face of the valve port 15 is abraded, the valve stem 20 is rotated by a handle 23 to rotate the spherical valve seat member 11 by 90 degrees and the valve ports 16 to 18 are positioned so that they are opened/closed by a float 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes a difference in specific gravity between a gas and a liquid to drive a valve means with an open or closed float to selectively and automatically select one fluid from a gas-liquid mixing system. Concerning the structure of the discharge float valve. The above-mentioned float valve is used when selectively discharging either gas or liquid from a system in which gas and liquid are mixed. Steam trap that automatically discharges condensate generated in the steam piping system, air trap that automatically discharges condensed water generated in the compressed air piping system,
It is an air vent that automatically discharges the air mixed in the water piping system.

[0002]

2. Description of the Related Art A conventional float valve is disclosed in Japanese Patent Publication Sho-55-472.
This will be described with reference to Japanese Patent Publication No. 79. The flow shown here
The valve is a closed free-float steam trap. A valve chamber is formed in the valve casing that has an inlet and an outlet, and a valve seat member that opens the valve port that connects the valve chamber and the outlet is attached to the bottom of the valve chamber, and a spherical float can be freely placed in the valve chamber. The floats float up and down according to the level of the condensate accumulated in the valve chamber, and the condensate is discharged from the outlet by directly opening and closing the valve opening on the outer surface.

[0003]

The valve seat member of the above-mentioned float valve is formed separately from the valve casing and is formed so that it can be replaced when the valve seat surface of the valve opening is worn. There is. However, it is uneconomical to dispose of after only one use, and it has to be disassembled for replacement, which is troublesome.

Therefore, the technical problem of the present invention is to obtain a valve seat structure of a float valve which can be reused without being disassembled even if the valve seat surface of the valve opening of the valve seat member is worn. ..

[0005]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to form a valve chamber in a valve casing having an inlet and an outlet, and to form the valve chamber and the outlet. A valve seat member with an open valve opening that connects the valve seat is attached to the valve casing, and the valve seat is formed in a spherical shape in the valve opening and closing by driving the valve means with the float arranged in the valve chamber. A plurality of valve openings having the same opening area are opened in the spherical valve seat member, and a valve shaft for rotating each valve opening to a position opened and closed by the valve means is connected to the spherical valve seat member.

[0006]

The operation of the above technical means is as follows.
By rotating the spherical valve seat member with the valve shaft, each of the plurality of valve openings can be rotated to a position where it can be opened and closed by the valve means. Therefore, even if the valve seat surface of the valve opening is worn,
It is possible to switch to another valve opening without disassembling and to reuse the valve seat member.

[0007]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIGS. 1 and 2). A lid 2 is fastened to the main body 1 with bolts 3 to form a valve casing having a valve chamber 4 inside. A gasket 5 is interposed between the main body 1 and the lid 2 to keep them airtight. An inlet 6 and an outlet 7 are formed in the upper portion of the main body 1 on the same axis. Female threads for pipe connection are formed at the inlet 6 and the outlet 7, respectively. The outlet 7 communicates with the valve chamber 4 through a valve seat member mounting port 8 opened on the lower side wall of the valve chamber 4 and a discharge passage 9.

An annular step portion is formed in the valve seat member mounting port 8 and an annular valve seat 10 is arranged. A spherical valve seat member 11 is placed against the annular valve seat 10 and a plug 12 is screwed to and held on the body 1. The gasket 13 keeps the airtightness between the plug 12 and the body 1. An annular step is also formed at the tip of the plug 12, and the annular valve seat 14 is arranged between the plug 12 and the spherical valve seat member 11.
The spherical valve seat member 11 has valve openings 15, 16, 1 having the same opening area.
Open 7,18.

A groove 19 is formed in the spherical valve seat member 11, and a valve shaft 20 arranged through the main body 1 is fitted therein. Valve shaft 2
The seal member 21 is arranged on the upper surface of the flange portion of No. 0, and is clamped by the holder 22 from the upper surface to keep the gland portion airtight.
A handle 23, washers 24 and 25, and a slide plate 26 are arranged on the upper surface of the holder 22, and a nut 27 is screwed to the valve shaft 20.

A hollow spherical float 28 is arranged in the valve chamber 4 in a free state. The outer surface of the float 28 is directly seated on and off the spherical valve seat member 11 to open and close the valve port. A float seat 29 is formed on the bottom wall of the valve chamber 4 for holding the float 28 in the valve closed position.

When the valve seat surface of the valve opening 15 is worn, the valve shaft 20 is rotated by the handle 23 to move the spherical valve seat member 11 to 9
Rotate by 0 degrees. As a result, the valve ports 16, 17,
18 is faced to the valve chamber 4 and positioned so as to be opened and closed by the float 28.

[0012]

The present invention produces the following unique effects. As described above, according to the present invention, even if the valve seat surface of the valve opening is worn, by rotating the valve seat member, it is possible to switch to another valve opening without disassembling the valve seat member. Can be reused.

[Brief description of drawings]

FIG. 1 is a sectional view of a float valve according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Main Body 2 Lid 4 Valve Chamber 6 Inlet 7 Outlet 11 Spherical Valve Seat Member 15, 16, 17, 18 Valve Port 20 Valve Shaft 28 Float

Claims (1)

[Claims] 1. A valve seat having an inlet and an outlet, a valve chamber being formed in the valve casing, and a valve seat communicating with the outlet and having an opened valve seat is attached to the valve casing and disposed in the valve chamber. Flow
In which the valve means is driven by a valve to open and close the valve opening, the valve seat member is formed in a spherical shape, a plurality of valve openings having the same opening area are opened in the spherical valve seat member, and each valve opening is opened and closed by the valve means Float valve in which a valve shaft that rotates to a fixed position is connected to a spherical valve seat member.