JP2714891B2 - Float valve - Google Patents

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 in an open or closed float to selectively and automatically select one fluid from a gas-liquid mixture system. It relates to the structure of a float valve for discharging. The float valve is used for selectively and automatically discharging either gas or liquid from a system in which gas and liquid are mixed. A steam trap for automatically discharging condensate generated in the steam piping system, an air trap for automatically discharging condensed water generated in the compressed air piping system,
An air vent that automatically discharges air mixed in the water piping system.

[0002]

2. Description of the Related Art A conventional float valve is disclosed in Japanese Patent Publication No. 55-472.
This will be described with reference to JP-A-79. The flow shown here
The valve is a sealed free-float type steam trap. A valve chamber is formed in a valve casing with an inlet and an outlet, and a valve seat member with an open valve port connecting the valve chamber and the outlet is attached to the bottom of the valve chamber, and a spherical float is freely placed in the valve chamber. The floats float up and down according to the water level of the condensate collected in the valve chamber, and the valve port is opened and closed directly on the outer surface to discharge the condensate from the outlet.

[0003]

The valve seat member of the above-mentioned float valve is formed separately from the valve casing so that it can be replaced when the valve seat surface of the valve port is worn. I have. However, disposal after a single use is uneconomical and time-consuming because it must be disassembled for replacement.

[0004] It is therefore a technical object of the present invention to provide a valve seat structure of a float valve which can be reused without being disassembled even if the valve seat surface of the valve port of the valve seat member is worn. .

[0005]

SUMMARY OF THE INVENTION In order to solve the above technical problem, the technical means of the present invention is to form a valve chamber in a valve casing having an inlet and an outlet, and to provide a valve chamber and an outlet. A valve seat member having an open valve port is connected to a valve casing, and valve means is driven by a float disposed in a valve chamber to open and close the valve port. A plurality of valve ports having the same opening area are opened in the spherical valve seat member, and a valve shaft for rotating each valve port to a position opened and closed by 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 ports can be rotated to a position opened and closed by the valve means. Therefore, even if the valve seat surface of the valve port is worn,
It is possible to switch to another valve port without disassembling, and the valve seat member can be reused.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific 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 therein. A gasket 5 is interposed between the main body 1 and the lid 2 to keep the two airtight. An inlet 6 and an outlet 7 are formed on the same axis in the upper part of the main body 1. 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 in a lower side wall of the valve chamber 4 and a discharge passage 9.

An annular step is formed in the valve seat member mounting opening 8 and the annular valve seat 10 is arranged. The spherical valve seat member 11 is arranged against the annular valve seat 10, and the plug 12 is screwed and held to the main body 1. Airtightness between the plug 12 and the main body 1 is maintained by the gasket 13. 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.
Valve ports 15, 16, 1 having the same opening area are provided on the spherical valve seat member 11.
Open 7 and 18.

A groove 19 is formed in the spherical valve seat member 11, and a valve shaft 20 penetrating through the main body 1 is fitted. Valve shaft 2
A seal member 21 is disposed on the upper surface of the flange portion 0, and the seal member 21 is tightened from the upper surface with a holder 22 to keep the airtightness of the gland portion.
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 disposed in the valve chamber 4 in a free state. The outer surface of the float 28 is directly attached to and detached from 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 to hold the float 28 in the closed position.

When the valve seat surface of the valve port 15 is worn, the valve shaft 20 is rotated by the handle 23 to move the spherical valve seat member 11 to the position 9.
Rotate by 0 degrees. Thereby, the valve ports 16, 17,
The valve 18 faces the valve chamber 4 and is opened and closed by a float 28.

[0012]

The present invention has the following specific effects. As described above, according to the present invention, even if the valve seat surface of the valve port is worn, by rotating the valve seat member, it is possible to switch to another valve port without disassembly, and to replace the valve seat member. Can be reused.

[Brief description of the 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 line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 4 Valve room 6 Inlet 7 Outlet 11 Spherical valve seat member 15, 16, 17, 18 Valve port 20 Valve shaft 28 Float

Claims (1)

(57) [Claims] 1. A valve chamber is formed in a valve casing having an inlet and an outlet, and a valve seat member having an open valve port connecting the valve chamber and the outlet is attached to the valve casing and disposed in the valve chamber. Flow
When the valve port is opened and closed by driving the valve means, a valve seat member is formed in a spherical shape, a plurality of valve ports having the same opening area are opened in the spherical valve seat member, and each valve port is opened and closed by the valve means. Float valve in which a valve shaft that rotates to the desired position is connected to a spherical valve seat member.