JPH06323453A - Exhaust valve - Google Patents

Abstract

PURPOSE:To obtain an exhaust valve which can open and close its optional exhaust valve hole in any pressure state from a low pressure to a high pressure in its simple construction. CONSTITUTION:An inflow port 1, a valve chamber 5 and an exhaust port 3 are formed in valve casings 2, 4 and 6. A valve seat member 11 in which a communicating hole 12 for communicating the valve chamber 5 to the exhaust port 3 is attached to the valve casing 4. A cylindrical exhaust valve body 13 is positioned slidably within the communicating hole 12. A float 21 is attached to the lower part of the exhaust valve body 13 and also its upper part is arranged in a hole part 19 formed in the valve casing 4 slidably. A through hole 15 is provided inside the exhaust valve body 13 so as to communicate the valve chamber 5 to the hole part 19. A plurality of exhaust valve holes 23, 24 and 25 are passed through the three exhaust ports of the exhaust valve body 9.

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 particularly, to open a valve opening of a required size under any pressure condition. And what can be exhausted.

Usually, an exhaust valve is called an initial rapid exhaust valve that opens an exhaust valve port to discharge a large amount of low-pressure air only when water is initially supplied to a water pipe. There are two types of so-called automatic exhaust valves that close when water comes in.

[0003]

2. Description of the Related Art A conventional exhaust valve is, for example,
The one disclosed in Japanese Patent 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.The large valve opening functions as an initial rapid exhaust valve that discharges a large amount of initial air. It functions as an automatic exhaust valve that opens when air comes in at the valve opening.

[0004]

SUMMARY OF THE INVENTION In the above conventional one,
The two functions of the initial rapid exhaust valve and the automatic exhaust valve can be achieved by a single valve, but there is a problem that the structure becomes complicated because it requires a float, a lever, and two large and small valve openings. It was

Further, in the above-mentioned conventional type, 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 has flowed in, it cannot be exhausted. This is because the area of the valve opening that can be opened by the float having a constant buoyancy and gravity is determined by the pressure difference before and after the valve opening, and cannot be opened by a pressure difference larger than that.

Therefore, the technical problem of the present invention is that the simple structure can fulfill the functions of both sides of the initial rapid exhaust valve and the automatic exhaust valve, and can discharge a large amount of air under any pressure condition. To get an exhaust valve.

[0007]

The technical means of the present invention taken to solve the above technical problems is to form a valve chamber by valve casing, and have an inflow port in the lower part of the valve chamber in the upper part. An exhaust port is provided, and a valve seat member having a communication hole for communicating both the exhaust port and the valve chamber is attached, and a cylindrical exhaust valve body is slidably arranged in the communication hole. A through-hole is formed in the body, one of the through-holes is opened in the valve chamber, and the other is opened in a hole formed in the outlet-side valve casing to directly or indirectly connect to the valve-chamber part of the exhaust valve body. The exhaust is connected to the side of the exhaust valve body so that it communicates with the exhaust port when the float descends and communicates with the hole when the float rises. A valve hole is provided.

[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 tubular valve element is in a position communicating with the exhaust port,
The air flowing into the valve chamber through the inflow port is discharged from the exhaust port through the opening in the valve chamber, the through hole, and the exhaust valve hole. When water flows from the inlet into the valve chamber, 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 it does not communicate with the exhaust port and prevents water discharge. At the same time, the air discharge is stopped. When air again flows 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 depending on the water level in the valve chamber.

Since the exhaust valve body is provided with a through hole, one of which is opened in the valve chamber and the other of which is opened in the hole formed in the outlet side valve casing, the inside of the exhaust valve body is increased when the float is raised. Since the pressure in the valve chamber acts on the outlet side as well, a pressure difference corresponding to the pressure difference between the valve chamber pressure and the outlet side does not occur in the exhaust valve body, so that no matter what the pressure state from low pressure to high pressure, With a small float buoyancy, a large exhaust valve hole can be opened, and a large amount of air can be discharged.

[0010]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIG. 1). A lower body 2 having an inflow port 1,
A valve casing is configured by an upper body 4 having an exhaust port 3 and a cylindrical body 6 that forms a valve chamber 5 with the upper and lower bodies 2, 4. The lower body 2 is provided with a wall 7 that separates from the valve chamber 5, and the wall 7 has an inlet 1
And a plurality of holes 8 and 9 communicating with the valve chamber 5.

A valve seat member 11 is screwed to the upper part of the valve chamber 5 and the center of the lower part of the upper body 4 via a gasket 10. A communication hole 12 that communicates the valve chamber 5 and the exhaust port 3 is formed in the center of the valve seat member 11, and a long and long cylindrical exhaust valve body 13 is slidably slidable in the communication hole 12 in a sliding ring 30. Place through. Therefore, the inner diameter of the communication hole 12 is made slightly larger than the outer diameter of the exhaust valve body 13.

A through hole 15 is formed in the exhaust valve body 13, one of which is opened in the valve chamber 5 through holes 16, 17, and 18, and the other is formed in a hole portion 19 provided in the upper body 4. Top hole 20
Open through. 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 body 1
The lower end 22 of 3 is placed on the wall 7 of the lower body 2.

In order to allow the exhaust valve body 13 to slide also in the hole portion 19 of the upper body 4, the inner diameter thereof is made slightly larger than the outer diameter of the exhaust valve body 13 and the sliding ring 31 is arranged. As shown in FIG. 1, when the float 21 is descending, a plurality of exhaust valve holes 23,
24 and 25 are provided. The exhaust valve holes 23, 24, 25 communicate with the through hole 15 and are provided at positions located inside the hole portion 19 when the float 21 rises. Exhaust valve holes 23, 2
The size, shape, and number of 4, 25 can be appropriately selected from a circular shape, a rectangular shape, a fan shape, or the like according to the exhaust flow rate characteristic 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. In this case, the exhaust valve body 13 is located on the wall 7, and the exhaust valve holes 23, 24, 25 are located in the exhaust port 3
Communicate with. Therefore, the air flowing in from the inflow port 1 is exhausted from the exhaust port 3 through the holes 8 and 9, the holes 16, 17 and 18, the through hole 15 and the exhaust valve holes 23, 24 and 25.

When water flows into the valve chamber 5 through 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 as the float 21 rises
3 also rises and the exhaust valve holes 23, 24, 25 are located in the hole portion 19, the exhaust valve holes 23, 24, 25 are closed by the hole portion 19, and water is discharged to the exhaust port 3. In addition to being prevented, the discharge of air is stopped.

When the float 21 is raised, the hole portion 19 of the upper 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 portion 19 Is equal to the pressure inside the valve chamber 5. Therefore, the exhaust valve body 13
When the valve chamber 5 moves downward, the pressure difference corresponding to the pressure difference between the internal pressure of the valve chamber 5 and the pressure of the exhaust port 3 does not act, and the valve chamber 5
Regardless of the internal pressure, that is, the pressure on the inlet 1 side from low pressure to high pressure, the exhaust valve holes 23, 24, 25 can be opened and closed by a constant float buoyancy.

In this embodiment, an example in which the float 21 is directly attached to the exhaust valve body 13 has been shown, but the float has a lever-float structure, which is opposite to the lever's float. The exhaust valve body 13 may be connected to the side portion.

[0018]

The present invention produces the following unique effects. With a simple structure consisting of a cylindrical exhaust valve and a float, it is possible to open a large exhaust valve hole regardless of the pressure difference from low pressure to high pressure. The two functions of the exhaust valve can be fulfilled with one valve.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Inlet 3 Exhaust Port 5 Valve Chamber 11 Valve Seat Member 12 Communication Hole 13 Exhaust Valve Disc 15 Through Hole 19 Hole 21 Float 23, 24, 25 Exhaust Valve Hole

Claims (1)

[Claims] 1. A valve seat in which a valve chamber is formed by valve casing, an inflow port is provided at a lower part of the valve chamber, an exhaust port is provided at an upper part thereof, and a communication hole is formed between the exhaust port and the valve chamber to communicate the two. A member is attached, a cylindrical exhaust valve body is slidably arranged 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. Open the hole in the valve casing and attach the float directly or indirectly to the valve chamber part of the exhaust valve body, and at the side of the exhaust valve body when the float descends. An exhaust valve which is provided with an exhaust valve hole which communicates with the exhaust port and communicates with the through hole when the float rises.