JP2009121611A - Vacuum break valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum break valve which is forcibly closed by forcibly seating a valve element on a valve seat, or forcibly opened by forcibly releasing the valve element from the valve seat. <P>SOLUTION: An atmosphere port 4, a valve chest 3 and an inlet 6 are formed in a valve casing consisting of a body 1 and a lid member 2. An annular valve seat 5 is provided between the atmosphere port 4 and the valve chest 3. A disk-like valve element 7 for opening/closing the annular valve seat 5 is arranged in the valve chest 3. A coil spring 8 for urging the disk-like valve element 7 to the annular valve seat 5 is provided. A forcibly operating bar 9 is arranged in an advancing/retracting manner through the lid member 2 in an airtight manner. A flange 14 is provided on an inner end of the forcibly operating bar 9, a flange 13 is provided on a connecting rod 12 of the disk-like valve element 7, the disk-like valve element 7 is seated on the annular valve seat 5 according to the position of the forcibly operating bar 9, and forcibly closed, or the disk-like valve element 7 is released from the annular valve seat 5, and forcibly opened, or the forcibly operating bar 9 is connected to the disk-like valve element 7 so as not to prevent any releasing/seating of the disk-like valve element 7 from/on the annular valve seat. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vacuum breaker valve that is connected to a fluid piping system such as a fluid piping or a fluid device and introduces the atmosphere to break the vacuum state when the fluid piping system is in a vacuum state.

  The vacuum breaker valve forms an inlet opening connected to the fluid piping system in the valve casing, a valve chamber, and an atmospheric opening that opens to the atmosphere. A valve seat is provided between the atmospheric opening and the valve chamber, and the valve seat is opened and closed. The valve body is placed in the valve chamber and provided with a spring that urges the valve body to the valve seat. Normally, the valve body is seated on the valve seat, the valve seat is closed, and the inlet side is in a vacuum state. Sometimes, the valve body separates from the valve seat and opens the valve seat.

In the above conventional vacuum breaker valve, the valve body automatically attaches and detaches to and from the valve seat, so that the valve body normally closes the valve seat automatically and the valve body is closed when the inlet side is in a vacuum state. The valve seat can be opened automatically, but the valve body is forced to be seated on the valve seat and forcibly closed, or the valve body is forcibly separated from the valve seat and forced to open. There was a problem that could not be made.
JP-A-2005-90543

  The problem to be solved is that the valve body can be forcibly seated on the valve seat and forcibly closed, or the valve body can be forcibly separated from the valve seat and forcibly opened. It is to provide a destruction valve.

  The present invention relates to a valve that opens and closes a valve seat by forming an inlet opening connected to a fluid piping system in a valve casing, a valve chamber, and an atmosphere opening opened to the atmosphere, and providing a valve seat between the atmosphere opening and the valve chamber. The body is placed in the valve chamber and provided with a spring that urges the valve body to the valve seat. The valve body is provided with a flange, the valve body is seated on the valve seat according to the position of the forcible operation rod, the valve body is forcibly closed, or the valve body is separated from the valve seat to forcibly open or the valve of the valve body The forcible operation rod and the valve body are connected so as not to prevent the seating on the seat.

  In the vacuum breaker valve according to the present invention, the forcible operation rod is moved forward and backward, so that the valve body is seated on the valve seat and the valve body is forcibly closed, or the valve body is separated from the valve seat and the valve body is forcibly opened. The take-off seating on the valve seat can be prevented. Therefore, it is possible to provide a vacuum breaker valve capable of forcibly seating the valve body on the valve seat and forcibly closing it, or forcibly separating the valve body from the valve seat and forcibly opening the valve body. This produces an excellent effect.

  The vacuum breaker valve of the present invention has a forcible operating rod arranged so as to be able to advance and retract through the valve casing in an airtight manner, and a flange is provided on the inner end of the forcible operating rod and the valve body, depending on the position of the forced operating rod. Forcibly operating rod and valve body so that the valve body is seated on the valve seat and forcibly closed, or the valve body is separated from the valve seat to forcibly open, or the valve body is not obstructed to be seated on the valve seat. Are concatenated. Therefore, when the forcible operating rod is operated to a position that does not prevent the valve body from being attached to or detached from the valve seat, the valve body is automatically attached to or detached from the valve seat to open and close the valve seat. The valve seat can be forcibly closed by operating the forcible operation rod at a position where the valve body is forcibly seated on the valve seat. The valve seat can be forcibly opened by operating the forcible operation rod to a position where the valve body is forcibly separated from the valve seat.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A valve casing is constituted by the main body 1 and the lid member 2, and a valve chamber 3 is formed in the valve casing. The main body 1 is formed with an atmospheric port 4 opened to the atmosphere, an annular valve seat 5 provided at the opening end of the atmospheric port 4 on the valve chamber 3 side, and an inlet 6 connected to the fluid piping system. A disc-shaped valve body 7 that opens and closes the annular valve seat 5 by opening and closing the annular valve seat 5 is disposed in the valve chamber 3 so as to face the annular valve seat 5. A coil spring 8 that biases the disc-shaped valve body 7 toward the annular valve seat 5 is disposed between the disc-shaped valve body 7 and the lid member 2.

  The forcible operation rod 9 is passed through the lid member 2 and screwed. An O-ring 10 for maintaining airtightness between the forcible operation rod 9 is disposed on the lid member 2. The forcible operation rod 9 is connected to the handle 11 at the outer end so that it can be rotated. As a result, the forcible operation rod 9 can be operated to advance and retract. A hole is made in the inner end of the forcible operating rod 9 and the connecting rod 12 fixed to the disc-like valve body 7 is inserted. A flange 13 is provided at the tip of the connecting rod 12, a snap ring or the like is fitted to the lower end of the hole of the forcing rod 9, an inward flange 14 is provided, and the forcing rod 9 and the disc-shaped valve body 7 are coupled. As a result, when the forcible operating rod 9 is screwed in, the inner wall of the inner end of the hole abuts against the flange 13 of the connecting rod 12, and the disc-like valve body 7 is forcibly seated on the annular valve seat 5 to thereby cause the annular valve. The seat 5 is forcibly closed. When the forcible operating rod 9 is unscrewed, the flange 14 of the forcible operating rod 9 comes into contact with the flange 13 of the connecting rod 12, and the disc-like valve body 7 is forcibly separated from the annular valve seat 5, thereby Force open. If the forcible operating rod 9 is set to the above-mentioned intermediate position, the disc-like valve element 7 is automatically separated from the annular valve seat 5 without being obstructed by the forcible operating rod 9, and the annular valve seat 5 is automatically opened and closed. .

  In FIG. 1, the forcible operation rod 9 is operated to an intermediate position, the fluid pressure on the inlet 6 side and the spring biasing force of the coil spring 8 are always larger than the fluid pressure on the atmosphere port 4, and the disc-shaped valve element 7 is an annular valve. A state in which the seat 5 is automatically seated and the annular valve seat 5 is automatically closed is shown. When the inlet 6 side is in a vacuum state, and the fluid pressure at the inlet 6 and the spring biasing force of the coil spring 8 become smaller than the fluid pressure at the atmosphere port 4, the disc-like valve body 7 compresses the coil spring 8 and the annular valve seat 5. And the annular valve seat 5 is automatically opened. Thereby, air | atmosphere is introduce | transduced from the air inlet 4 to the inflow port 6 side, and a vacuum state is destroyed.

  When the annular valve seat 5 is forcibly closed, the forcible operation rod 9 is screwed to forcibly seat the disc-like valve body 7 on the annular valve seat 5. When the annular valve seat 5 is forcibly opened, the forcible operation rod 9 is unscrewed to forcibly separate the disc-shaped valve body 7 from the annular valve seat 5.

Sectional drawing which shows the Example of the vacuum breaker valve of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid member 3 Valve chamber 4 Atmospheric opening 5 Annular valve seat 6 Inlet 7 Disc-shaped valve body 8 Coil spring 9 Forced operation rod 10 O-ring 11 Handle 12 Connecting rod 13 Flange 14 Flange

Claims (1)

The valve casing forms an inlet port connected to the fluid piping system, a valve chamber, and an atmosphere port opened to the atmosphere. A valve seat is provided between the atmosphere port and the valve chamber, and a valve body for opening and closing the valve seat is provided in the valve chamber. The forcible operation rod is arranged to be able to move forward and backward through the valve casing in an airtight manner, and is provided on the inner end of the forcible operation rod and the valve body. A flange is provided so that the valve body is seated on the valve seat according to the position of the forcible operating rod and the valve body is forcibly closed, or the valve body is separated from the valve seat to forcibly open or the valve body is separated from the valve seat. A vacuum breaking valve characterized by connecting a forced operating rod and a valve body so as not to prevent seating.

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