JP2013130256A - Exhaust valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust valve preventing water leakage when water flows into a valve chamber from an inlet.SOLUTION: A valve chamber 3 opened in a lower part with an inlet 4 and an outlet 5 in an upper part is formed by a casing comprising a body 1 and a lid 2. A valve seat 6 is formed between the valve chamber 3 and the outlet 5. The body 1 integrally has a plurality of ribs 9 protruding inward toward a valve chamber 3 inner wall, and a bottomed and almost cylindrical float receiver 10 provided in a bottom with a through hole 11 communicating the inside and the outside is fixed to inner sides of the ribs 9. A spherical float 12 is disposed in a free state in the float receiver 10. A water flow receiving member 13 having a plane part 13b extending in an almost horizontal direction is connected to a lower part of the spherical float 12. Since water flowing into the float receiver 10 from the through hole 11 hits the plane part 13a extending in the almost horizontal direction of the water receiving member 13 and pushes up the spherical float 12 via the water receiving member 13, water leakage does not happen.

Description

The present invention opens the valve when water is fed into the pipe, exhausts the air in the pipe, closes when the exhaust is finished, and opens when the pressure in the piping system drops to a vacuum state. The present invention relates to an exhaust valve that breaks a vacuum state by introducing external air.

A conventional exhaust valve is disclosed in Patent Document 1, for example. This is a casing that forms a valve chamber with an inlet opening in the lower part and an outlet opening in the upper part, forming a valve seat between the valve chamber and the outlet, and forming a rib protruding inward on the valve chamber wall. Then, a float receiver having a substantially cylindrical shape with a bottom on the inside of the rib and provided with a through hole communicating with the inside and the outside at the bottom is fixed, and a spherical float is arranged in the float receiver in a free state. This exhaust valve is in an open state in which the spherical float is separated from the valve seat and lowered when water is first fed into the pipe, and the air in the pipe that flows into the valve chamber from the inlet is space between the ribs. The air is exhausted from the through hole through the upper end of the float receiver and through the inside of the float receiver through the through hole. When exhaust is finished and the water in the pipe flows into the valve chamber from the inlet, the spherical float rises due to the water flowing into the float receiver from the space between the ribs through the upper end of the float receiver and through the through hole. Sit on the valve seat and close it. In addition, when the pressure in the piping system drops to a vacuum state, the spherical float moves away from the valve seat and descends, and external air flowing into the valve chamber from the outlet is passed through the through hole and floated. The vacuum state is broken by introducing it into the pipe from the inlet through the space between the receiving upper end and the rib.

Japanese Utility Model Publication No. 53-1622

The conventional exhaust valve has a problem that water leaks from the outlet when water flows into the valve chamber from the inlet. This is because the water flowing into the float receiver from the through hole flows smoothly along the outer surface of the spherical float, so that the force for pushing up the spherical float is insufficient.

Therefore, the problem to be solved by the present invention is to provide an exhaust valve that does not cause water leakage when water flows into the valve chamber from the inlet.

In order to solve the above-described problems, the exhaust valve of the present invention forms a valve chamber having an inlet opening at the bottom and an outlet opening at the upper portion of the casing, and a valve seat is formed between the valve chamber and the outlet. Then, a rib that protrudes inward is formed on the valve chamber wall, and a float receiver that has a substantially cylindrical shape with a bottom on the inside of the rib and a through hole that communicates the inside and outside is fixed to the bottom of the rib. In the free arrangement, a water flow receiving member having a flat portion extending in a substantially horizontal direction is connected to the lower portion of the spherical float.

According to the present invention, since the water flow receiving member having a flat portion extending in the substantially horizontal direction is connected to the lower part of the spherical float, when the water flows into the valve chamber from the inflow port, the float receiving member is received from the through hole. Since the water flowing in the water hits the plane portion extending in the substantially horizontal direction of the water flow receiving member and pushes up the spherical float through the water flow receiving member, there is an effect that no water leakage occurs.

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. A lid 2 is fastened to the main body 1 with a bolt to form a casing having a valve chamber 3 therein. An inlet 4 is formed in the lower part of the main body 1, and an outlet 5 is formed in the upper part of the lid 2. The attachment member 7 is fixed with screws with the valve seat 6 interposed between the lid 2 and the valve seat 6.

The main body 1 integrally has a plurality of ribs 9 protruding inwardly on the inner wall of the valve chamber 3, and a bottomed substantially cylindrical float receiver 10 is fixed to the inside of the ribs 9 with a snap ring. The float receiver 10 has a through hole 11 communicating with the inside and the outside at the bottom. A spherical float 12 is arranged in a free state in the float receiver 10. The water flow receiving member 13 having a concave portion 13a substantially along the outer surface of the spherical float 12 for accommodating the lower portion of the spherical float 12 and having an annular flat portion 13b extending outward in a substantially horizontal direction on the outer periphery is spherical. Place under the float 12. For example, a float holding member 14 composed of four elastic bodies on the left and right sides, the front side, and the other side of a plurality of spherical floats 12 is fixed on the flat surface portion 13b of the water flow receiving member 13 by welding. The float holding member 14 is not limited to four, and can be constituted by three or more. The float holding member 14 includes a middle portion 14a extending in a substantially vertical direction, a lower end portion 14b extending inward in a substantially horizontal direction from the lower end of the middle portion 14a, and an inner tip portion thereof being welded to the water flow receiving member 13, and a middle portion 14a. The upper end portion 14 c extends obliquely inwardly from the upper end of the upper end portion 14 and engages the spherical float 12. The upper end portion 14c and the middle portion 14a of the float holding member 14 are expanded outward, the spherical float 12 is inserted inward of the float holding member 14, and the lower portion of the spherical float 12 is disposed in the concave portion 13a of the water flow receiving member 13 to float. The spherical float 14 is rotatably connected above the water flow receiving member 13 by the holding member 14.

The operation of the exhaust valve is as follows. First, when water is fed into the pipe, the spherical float 12 is lowered from the valve seat 6 to open the outlet 5 and the water flow receiving member 13 is placed on the bottom wall of the float receiver 10. Thereby, the air in the pipe flowing into the valve chamber 3 is exhausted from the space between the ribs 9 through the upper end of the float receiver 10 and through the through hole 11 into the outlet 5 to the outlet 5.

When the exhaust is finished and the water in the pipe flows into the valve chamber 3 from the inlet 4, the spherical float 12 passes through the upper end of the float receiver 10 from the space between the ribs 9 and the float receiver 10 through the through hole 11. It floats up by the water flowing into the valve seat and sits on the valve seat 6 to close the outlet 8. This prevents leakage of water. At this time, water flowing into the float receiver 10 from the through hole 11 hits the flat surface portion 13a extending in the substantially horizontal direction of the water receiver 13 and pushes up the spherical float 12 via the water receiver 13, thereby causing water leakage. There is no. When the pressure in the piping system is reduced to a vacuum state, the spherical float 12 is separated from the valve seat 6 and descends to open the outlet 5 and the water receiving member 13 is placed on the bottom wall of the float receiver 10. Become. Thus, the external air flowing into the valve chamber 3 is introduced into the pipe through the space between the rib receiver 9 from the upper end of the float receiver 10 and from the inlet 4 into the pipe through the through hole 11 from the float receiver 10. Destroy.

The present invention opens the valve when water is fed into the pipe, exhausts the air in the pipe, closes when the exhaust is finished, and opens when the pressure in the piping system drops to a vacuum state. Thus, it can be used as an exhaust valve for breaking the vacuum state by introducing external air.

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve chamber 4 Inflow port 5 Outlet 6 Valve seat 9 Rib 10 Float receptacle 11 Through-hole 12 Spherical float 13 Water flow receiving member 13a Water flow receiving member recessed part 13b Water flow receiving member plane part 14 Float holding member

Claims (1)

In the casing, a valve chamber is formed with an inlet opening at the bottom and an outlet opening at the top, a valve seat is formed between the valve chamber and the outlet, and a rib protruding inward is formed on the valve chamber wall. A float receiver having a substantially cylindrical shape with a bottom and a through hole communicating with the inside and the outside is fixed inside, and a spherical float is arranged in a free state in the float receiver. An exhaust valve characterized in that a water flow receiving member (13) is connected to a lower part of a spherical float.

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