JP2013204634A - Exhaust valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust valve having a simple structure and functions of both an initial quick exhaust valve and an automatic exhaust valve.SOLUTION: A valve chamber 3 is formed inside with a casing consisting of a body 1 and a top lid 2. An inlet 4 is formed at a lower part of the valve chamber 3 and an outlet 5 is formed at an upper part thereof. A large valve port 6, which communicates the valve chamber 3 with the outlet 5, is formed on the top of the valve chamber 3. A main float 7, which has a cross section in an approximately inverted recessed shape and opens and closes the large valve port 6, is guided and disposed vertically in the valve chamber 3. A small valve port 8 is formed at the top wall of the main float 7 so as to vertically penetrate therethrough. A spherical sub-float 9, which opens and closes the small valve port 8, is disposed in the main float 7.

Description

The present invention relates to an exhaust valve that is attached to a water pipe such as cold water or hot water and exhausts air in the pipe, and in particular, the air in the pipe at the beginning of water supply can be rapidly exhausted and then discharged whenever the air accumulates. About things. The exhaust valve rapidly exhausts the air in the pipe at the beginning of water supply, closes when exhausting is finished and water comes in, and then keeps the valve closed. There is a so-called automatic exhaust valve that discharges air whenever it accumulates. The present invention relates to an improvement of an apparatus having both functions of an initial quick exhaust valve and an automatic exhaust valve.

A conventional exhaust valve having the functions of both an initial rapid exhaust valve and an automatic exhaust valve is disclosed in Patent Document 1, for example. The valve chamber is formed inside the casing, the inlet is formed in the lower part of the valve chamber, the small valve opening and the large valve opening leading to the outlet are formed in the upper part, and the spherical float that opens and closes the small valve opening is freely provided in the valve chamber. A lever with a valve element that opens and closes the large valve opening at one end is hinged to the valve chamber. A spherical float is formed at the end with an opening that can open and close the small valve opening. In this exhaust valve, at the beginning of water supply, the float opens the small valve opening, the valve body opens the large valve opening, and the initial air is discharged from the small valve opening and the large valve opening to the outlet. When the exhaust of the initial air is completed and the water level in the valve chamber rises, the float rises and closes the small valve port, and the valve body closes the large valve port via the lever. Thereafter, the valve body is kept closed, the float rises and falls together with the water level in the valve chamber, opens and closes the small valve port 8, and water is not released and only air is automatically discharged.

Japanese Utility Model Publication 4-54380

The conventional exhaust valve having the functions of both the initial rapid exhaust valve and the automatic exhaust valve has a problem that the structure is complicated because the float and the valve body are connected by a lever.

Therefore, the problem to be solved by the present invention is to provide an exhaust valve having a simple structure having the functions of both an initial quick exhaust valve and an automatic exhaust valve.

In order to solve the above problems, an exhaust valve according to the present invention forms a valve chamber inside a casing, forms an inlet at the lower part of the valve chamber, forms an outlet at the upper part, and communicates the valve chamber with the outlet. A small valve that has a large valve port formed at the top of the valve chamber, and a main float with a roughly concave concave section that opens and closes the large valve port is guided in the vertical direction in the valve chamber, and penetrates the top wall of the main float vertically. A spherical sub-float that forms a mouth and opens and closes the small valve mouth is arranged in the main float.

According to the present invention, both the initial rapid exhaust valve and the automatic exhaust valve are provided by disposing the spherical sub-float that opens and closes the small valve port of the main float in the main float having a substantially inverted concave cross section that opens and closes the large valve port. It is possible to provide an exhaust valve with a simple structure having the above function.

It is sectional drawing of the exhaust valve concerning embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. An upper lid 2 is screwed to the main body 1 to form a casing having a valve chamber 3 therein. An inlet 4 is formed at the lower end of the main body 1, and an outlet 5 is formed at the upper end of the upper lid 2. The inlet 4 and the outlet 5 are formed on the same axis. A large valve opening 6 is formed at the opening end of the outlet 5 on the valve chamber 3 side. The large valve port 6 is formed on the axis of the inlet 4 and the outlet 5 and is directly connected to the outlet 5 so that the flow resistance does not increase.

A main float 7 having a top-cylindrical shape with a generally concave concave cross section for opening and closing the large valve port 6 is disposed below the large valve port 6. A small valve port 8 penetrating vertically is formed in the center of the top wall of the main float 7. A spherical sub-float 9 that opens and closes the small valve port 8 is disposed in the main float 7. Ribs 10 for guiding the main float 7 in the vertical direction are formed on the inner peripheral wall of the main body 1. Reference numeral 11 is a rib for preventing the main float 7 and the sub-float 9 from blocking the open end of the inlet 4 on the valve chamber 3 side.

The operation of the exhaust valve is as follows. At the beginning of water supply, the sub-float 9 and the main float 7 descend to open the main valve port 6, and initial air is discharged from the main valve port 6 to the outlet 5.

When the exhaust of the initial air is completed and the water level in the valve chamber 3 rises, the sub-float 9 and the main float 7 rise with it, and the sub-float 9 closes the small valve port 8 and the main float 7 moves the large valve port 6. close up. Thereafter, the main float 7 keeps the valve closed, and the sub-float 9 rises and falls together with the water level in the valve chamber 3 to open and close the small valve port 8 so that only water is automatically discharged without letting out water.

INDUSTRIAL APPLICABILITY The present invention can be applied to an exhaust valve that can be attached to a water pipe such as cold water or hot water to quickly exhaust the air in the pipe at the beginning of water supply, and then discharge the air whenever it accumulates.

1 Body 2 Top cover 3 Valve chamber 4 Inlet 5 Outlet 6 Large valve port 7 Main float 8 Small valve port 9 Sub float 10 Rib 11 Rib

Claims (1)

A valve chamber is formed inside the casing, an inlet is formed at the lower portion of the valve chamber, an outlet is formed at the upper portion, a large valve port that communicates the valve chamber with the outlet is formed at the top of the valve chamber, and the large valve port is formed. A main float with a roughly concave concave section that opens and closes is guided in the vertical direction in the valve chamber, a small valve port penetrating vertically is formed on the top wall of the main float, and a spherical sub-float that opens and closes the small valve port An exhaust valve characterized by being arranged in the main float.

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