JP5053008B2 - Exhaust valve - Google Patents

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 sucking external air.

  A conventional exhaust valve has a small-diameter intake / exhaust valve seat that forms a valve chamber with an inlet opening at the bottom and an outlet opening at the top of the casing, and the valve chamber communicates with the outlet between the valve chamber and the outlet. A float that opens and closes the intake / exhaust valve seat is arranged in the free state on the inlet side of the intake / exhaust valve seat, and a rib projecting inward is formed on the valve chamber wall. A float receiver having a substantially cylindrical bottom and provided with a through-hole communicating with the inside and outside of the bottom is arranged. This exhaust valve is in an open state in which when the water is first fed into the pipe, the float is separated from the intake / exhaust valve seat and descends, and the air in the pipe flowing into the valve chamber from the inlet is placed between the ribs. The air is exhausted from the space through the upper end of the float receiver and from the through hole through the inside of the float receiver to the outlet. When exhaust is finished and water in the pipe flows into the valve chamber from the inlet, the float rises and is absorbed by 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 exhaust valve seat and close it. In addition, when the pressure in the piping system drops to a vacuum state, the float moves away from the intake / exhaust valve seat and descends, allowing external air flowing into the valve chamber from the outlet through the through hole and through the through hole. The vacuum state is broken by sucking air into the pipe from the inlet through the space between the upper end of the float receiver and the rib.

The conventional exhaust valve has a problem that the vacuum breaking ability is small and the vacuum breaking takes time because the intake / exhaust valve seat cannot be formed in a large diameter. This is because if the intake / exhaust valve seat is formed to have a large diameter in order to increase the vacuum breaking capability, the float is blown up by the air flow during exhaust, and is seated on the intake / exhaust valve seat and closes.
Japanese Utility Model Publication No. 53-1622

  Therefore, the technical problem of the present invention is to provide an exhaust valve that has a large vacuum breaking ability and can be quickly broken.

The technical means of the present invention taken in order to solve the above technical problem is to form a valve chamber having an inflow opening in the lower part and an outflow opening in the upper part in the casing, and between the valve chamber and the outflow opening. A large-diameter intake valve seat that connects the valve chamber and the outlet is formed, an intake valve body that opens and closes the intake valve seat is arranged on the inlet side of the intake valve seat, and an upper rib that protrudes inward is formed on the valve chamber wall. The intake valve body is formed by guiding the intake valve body up and down on the inner end face of the upper rib, and the exhaust valve seat having a smaller diameter than the intake valve seat and communicating the valve chamber and the outlet is formed in the intake valve body. A float that opens and closes the exhaust valve seat on the side is arranged in a free state, a lower rib protruding inward is formed on the valve chamber wall, and a bottom is formed in a cylindrical shape with a bottom around the float inside the lower rib. arranged float received in which a through hole for communicating the inside and outside, for urging the intake valve body to the intake valve seat between the inlet valve body and a lower rib Is characterized in that provided the roots.

  According to the present invention, an intake valve seat having a diameter larger than that of the exhaust valve seat is formed separately from the exhaust valve seat, thereby producing an excellent effect that the vacuum breaking ability is large and the vacuum can be broken quickly.

  The present invention opens and closes a large-diameter intake valve seat that communicates between a valve chamber and an outflow port with an intake valve body that is biased to the intake valve seat by a spring, and communicates the valve chamber and the outflow port with a smaller diameter than the intake valve seat. The exhaust valve seat is opened and closed by a float that is arranged in a free state in the float receiver. For this reason, the intake valve seat can be formed in a large diameter to increase the vacuum breaking ability, and the vacuum breaking can be performed quickly.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The upper body 2 is fastened to the lower body 1 to form a casing having a valve chamber 3 therein. An inflow port 4 is formed in the lower part of the lower body 1, and an outflow port 5 is formed in the upper part of the upper body 2. A large-diameter annular intake valve seat 6 that communicates the valve chamber 3 and the outlet 5 is formed between the valve chamber 3 and the outlet 5 of the upper body 2. The intake valve seat 6 is formed integrally with the upper body 2. A disk-like intake valve body 7 for opening and closing the intake valve seat 6 is disposed on the inlet 4 side of the intake valve seat 6. The upper body 2 integrally has a plurality of ribs 8 projecting inwardly on the inner wall of the valve chamber 3, and guides the intake valve body 7 up and down on its inner end surface. A coiled spring 9 for biasing the intake valve body 7 to the intake valve seat 6 is provided between the intake valve body 7 and the rib 10 described below.

  The lower main body 1 integrally has a plurality of ribs 10 projecting inwardly on the inner wall of the valve chamber 3, and a bottomed substantially cylindrical float receiver 11 is disposed inside the rib 10 and fixed by a snap ring 12. The float receiver 11 has a through hole 13 communicating with the inside and the outside at the bottom. An exhaust valve seat 14 having a smaller diameter than the intake valve seat 6 and communicating the valve chamber 3 and the outlet 5 is formed in the center of the intake valve body 7. A spherical float 15 is disposed in a free state in the float receiver 10 on the inlet 4 side of the exhaust valve seat 14.

  The operation of the exhaust valve of the above embodiment is as follows. First, when water is fed into the pipe, the intake valve body 7 is seated on the intake valve seat 6 by the biasing force of the spring 9 and is closed. In addition, the float 15 is in a valve-opened state in which the float 15 is separated from the exhaust valve seat 14 and descends and is placed on the bottom wall of the float receiver 11. As a result, the air in the pipe flowing into the valve chamber 3 is exhausted from the space between the ribs 10 through the upper end of the float receiver 11 and through the through hole 13 into the float receiver 11 from the intake valve seat 6 to the outlet 5. .

  Then, when the exhaust is finished and the water in the pipe flows into the valve chamber 3 from the inlet 4, the float 15 enters the float receiver 11 from the space between the ribs 10 through the upper end of the float receiver 11 and through the through hole 13. It floats by the inflowing water, sits on the exhaust valve seat 14 and closes. This prevents leakage of water. When the pressure in the piping system is reduced to a vacuum state, the intake valve body 7 separates from the intake valve seat 6 against the biasing force of the spring 9 and opens. Further, the float 15 moves away from the exhaust valve seat 14 and descends to be in a valve-opened state on the bottom wall of the float receiver 11. Thus, the external air flowing into the valve chamber 3 from the outlet 5 through the intake valve seat 6 and the exhaust valve seat 14 passes through the space between the upper end of the float receiver 11 and the rib 10 and from the inside of the float receiver 10 to the through hole 13. The vacuum state is broken by sucking air from the inlet 4 into the pipe.

Sectional drawing of the exhaust valve of the Example of this invention.

Explanation of symbols

1 Lower Body 2 Upper Body 3 Valve Chamber 4 Inlet 5 Outlet 6 Intake Valve Seat 7 Intake Valve Body 9 Spring 10 Rib 11 Float Receiver 13 Through Hole 14 Exhaust Valve Seat 15 Float

Claims (1)

The casing has a valve chamber with an inlet opening in the lower part and an outlet opening in the upper part, and a large-diameter intake valve seat that connects the valve chamber and the outlet is formed between the valve chamber and the outlet. An intake valve body that opens and closes the intake valve seat is arranged on the inlet side of the seat, an upper rib protruding inward is formed on the valve chamber wall, and the intake valve body is guided up and down on the inner end face of the upper rib, and the intake valve An exhaust valve seat that has a smaller diameter than the seat and communicates the valve chamber and the outlet is formed in the intake valve body, and a float that opens and closes the exhaust valve seat on the inlet side of the exhaust valve seat is arranged in a free state on the valve chamber wall forming a lower rib protruding inwardly arranged float received in which a through hole for communicating the inside and outside on the bottom in the generally cylindrical shape of the bottomed around the float inside of the lower ribs, the intake valve body and the lower An exhaust valve characterized in that a spring for biasing the intake valve body to the intake valve seat is provided between the side ribs .

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