JP2835684B2 - Exhaust valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust valve for automatically discharging only air mixed in a water pipe, and in particular, to open a valve opening of a required size in any pressure state. About what can be exhausted.

[0002] Usually, an exhaust valve is called an initial quick exhaust valve that opens an exhaust valve opening only at the initial stage of water supply to a water pipe and discharges a large amount of low-pressure air. There are two types of so-called automatic exhaust valves that close when water comes in.

[0003]

2. Description of the Related Art As a conventional exhaust valve, for example,
No. 54380 was used. This is to open and close the large valve opening and the small valve opening at the same time by the float and lever mechanism. It functions as an automatic exhaust valve that opens when air comes in at the valve port.

[0004]

SUMMARY OF THE INVENTION In the above prior art,
Although the two functions of the initial quick exhaust valve and the automatic exhaust valve can be performed by one valve, there is a problem that the structure becomes complicated due to the need for a float, a lever, and two large and small valve ports. Was.

[0005] Further, in the above-mentioned conventional apparatus, there is a problem that the valve opening area of the small valve opening when functioning as an automatic exhaust valve is small, so that when a large amount of air flows in, it cannot be exhausted. This is because the area of the valve opening that can be opened by a float having a constant buoyancy and gravity is determined by the pressure difference between the front and rear of the valve opening, and cannot be opened with a pressure difference larger than that.

Accordingly, it is an object of the present invention to provide a simple structure that performs both functions of an initial rapid exhaust valve and an automatic exhaust valve, and that a large amount of air can be discharged under any pressure. Getting the exhaust valve.

[0007]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is that a valve chamber is formed by valve casing, and an inlet is provided at a lower part of the valve chamber at an upper part. An exhaust port is provided, a valve seat member having a communication hole opened between the exhaust port and the valve chamber is provided, and a cylindrical exhaust valve body is slidably disposed in the communication hole. A through hole is formed in the body, one of the through holes is opened in the valve chamber, the other is opened in a hole formed in the outlet side valve casing, and a swirler is attached in the through hole to exhaust the gas. A float is attached directly or indirectly to the valve chamber portion of the valve body, and the side portion of the exhaust valve body communicates with the exhaust port when the float is lowered and communicates with the above hole when the float is raised. The exhaust valve hole that communicates with the through hole is provided at a position corresponding to the above.

[0008]

The operation of the above technical means is as follows.
When the water level in the valve chamber is low and the float is descending, the exhaust valve hole provided in the cylindrical valve body is in a position communicating with the exhaust port,
The air flowing into the valve chamber from the inflow port is discharged from the exhaust port through the opening in the valve chamber, the through hole, and the exhaust valve hole. In this case, since the swirling blade is mounted in the through hole, the flowing air is swirled, and the exhaust valve body also swirls by the reaction. By turning the exhaust valve body, the static friction at the time of ascending the exhaust valve body becomes dynamic friction, so that the friction coefficient is reduced, and the exhaust valve body can move up and down with smaller float buoyancy.

When water flows into the valve chamber from the inlet, the float rises due to its buoyancy. As the float rises, the cylindrical exhaust valve body also rises, and the exhaust valve hole provided in the exhaust valve body communicates with the hole, so that it does not communicate with the exhaust port, preventing water discharge. At the same time, stop discharging air. When air flows again into the valve chamber and the water level drops, the float also drops, and the exhaust valve hole communicates with the exhaust port again to discharge air. This operation is repeated according to the water level in the valve chamber.

A through hole is provided in the exhaust valve body, one of which is opened in the valve chamber, and the other is opened in a hole formed in the outlet side valve casing. The pressure in the valve chamber also acts on the outlet side, and no differential pressure corresponding to the pressure difference between the valve chamber pressure and the outlet side is generated in the exhaust valve body, and therefore, regardless of the pressure state from low pressure to high pressure A large exhaust valve hole can be opened with a small float buoyancy, and a large amount of air can be discharged.

[0011]

An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A lower body 2 having an inlet 1 formed therein;
A valve casing is constituted by an upper main body 4 having an exhaust port 3 and a cylindrical body 6 forming a valve chamber 5 by the upper and lower main bodies 2 and 4. The lower body 2 is provided with a wall 7 which is separated from the valve chamber 5, and the wall 7 has an inlet 1.
A plurality of holes 8 and 9 are provided for communicating the valve chamber 5 with the valve 8.

A valve seat member 11 is screw-connected to the upper part of the valve chamber 5 and the lower center of the upper body 4 via a gasket 10. A communication hole 12 for communicating the valve chamber 5 and the exhaust port 3 is opened at the center of the valve seat member 11, and a long and cylindrical exhaust valve body 13 is slidably inserted into the communication hole 12 through a sliding ring 30. To place through. Therefore, the inner diameter of the communication hole 12 is slightly larger than the outer diameter of the exhaust valve body 13.

A through hole 15 is formed inside the exhaust valve body 13, one of which is opened through the holes 16, 17 and 18 in the valve chamber 5, and the other is formed in a hole 19 provided in the upper body 4. Top hole 20
Open through. The plurality of swirlers 26 in the through hole 15,
27 is attached. A hollow spherical float 21 is attached to the inside of the valve chamber 5 of the exhaust valve body 13 by welding. Exhaust valve element 1
The lower end 22 of 3 is placed on the wall 7 of the lower body 2.

The inner diameter of the hole 19 of the upper body 4 is made slightly larger than the outer diameter of the exhaust valve 13 so that the exhaust valve 13 can slide, and a sliding ring 31 is disposed. As shown in FIG. 1, when the float 21 is lowered, a plurality of exhaust valve holes 23,
24 and 25 are provided. The exhaust valve holes 23, 24, and 25 communicate with the through holes 15 and are provided at positions located in the holes 19 when the float 21 is raised. Exhaust valve holes 23, 2
The size, shape, and number of the 4, 25 can be appropriately selected from a circle, a rectangle, and a sector according to the discharge flow rate characteristics of the exhaust valve.

Next, the operation will be described. The exhaust valve connects the inflow port 1 to a water pipe (not shown) and automatically discharges only the air in the water pipe. As shown in FIG. 1, the float 21 in the valve chamber 5 is lowered. , The exhaust valve body 13 is located on the wall 7 and the exhaust valve holes 23, 24, 25 are
Communicate with Therefore, the air flowing in from the inflow port 1 is discharged from the exhaust port 3 through the holes 8, 9, the holes 16, 17, 18, the through hole 15, and the exhaust valve holes 23, 24, 25. The swirling blades 26 and 27 in the through hole 15 turn the airflow, and the exhaust valve 13 also turns due to the reaction.

When water flows into the valve chamber 5 from the inflow port 1, the water level in the valve chamber 5 rises, and the float 21 also rises due to its buoyancy. Exhaust valve body 1 with rise of float 21
When the exhaust valve holes 23, 24, and 25 are located in the holes 19, the exhaust valve holes 23, 24, and 25 are closed by the holes 19, and water is discharged to the exhaust port 3. This is prevented and the discharge of air is stopped. Exhaust valve body 13
When the exhaust valve 13 rises, the exhaust valve body 13 is turned, so that the exhaust valve body 13 can smoothly rise without the application of static friction.

When the float 21 is raised, the hole 19 of the upper main body 4 communicates with the valve chamber 5 through the hole 20, the through hole 15, and the holes 16, 17, and 18, and the inside of the hole 19 Is equal to the pressure in the valve chamber 5. Therefore, the exhaust valve body 13
When the pressure drops, the pressure difference corresponding to the pressure difference between the pressure in the valve chamber 5 and the pressure in the exhaust port 3 does not act, and the valve chamber 5
The exhaust valve holes 23, 24, 25 can be opened and closed by a constant float buoyancy regardless of the internal pressure, that is, the pressure on the inlet 1 side from low pressure to high pressure.

In this embodiment, an example is shown in which the float 21 is directly attached to the exhaust valve body 13, but the float has a lever-float structure, which is opposite to the float of the lever. An exhaust valve body 13 can be connected to the side.

[0019]

The present invention has the following specific effects. A simple structure with a cylindrical exhaust valve and float allows a large exhaust valve hole to be opened regardless of the pressure difference, regardless of the pressure from low pressure to high pressure. The two functions of the exhaust valve can be fulfilled by one valve.

By mounting the swirl vanes in the exhaust valve body, the exhaust valve body can rise while turning, and can exhaust with smaller float buoyancy.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of an exhaust valve of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inflow port 3 Exhaust port 5 Valve chamber 11 Valve seat member 12 Communication hole 13 Exhaust valve body 15 Through hole 19 Hole 21 Float 23, 24, 25 Exhaust valve hole 26, 27 Swirl vane

Claims (1)

(57) [Claims] 1. A valve seat in which a valve chamber is formed by valve casing, an inflow port is provided at a lower portion of the valve chamber, and an exhaust port is provided at an upper portion, and a communication hole communicating between the exhaust port and the valve chamber is opened. A member is attached, a cylindrical exhaust valve body is slidably disposed in the communication hole, a through hole is formed in the exhaust valve body, one of the through holes is opened in the valve chamber, and the other is on the outlet side. An opening is formed in a hole formed in the valve casing, and a swirler is attached in the through hole. A float is directly or indirectly attached to a valve chamber portion of the exhaust valve body. An exhaust valve, characterized in that an exhaust valve hole is provided on a side portion, at a position communicating with the exhaust port when the float is lowered and communicating with the hole when the float is raised, communicating with the through hole.