JP2541467Y2 - Air vent - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air vent which is attached to a convex portion of a cold / hot water pipe of a cooling / heating apparatus or the like and automatically discharges air mixed in the pipe to the outside of the system.

[0002]

2. Description of the Related Art A conventional air vent is described in, for example, Japanese Utility Model Publication No. 54-4097. This is for vertical mounting, the fluid inlet is formed below the valve chamber, and an exhaust port is formed at the top of the valve chamber to discharge air having a small specific weight. Therefore, the air flowing in from the inlet rises in the water as it is and replaces the liquid inside, and can flow out from the upper exhaust port.

[0003] However, in equipment such as indoor cooling and heating equipment, the space in which the air vent is installed is limited, and there is a case where the air vent cannot be installed with the vertical piping as described above. Therefore, an air vent for horizontal mounting, whose inlet is formed on the side of the valve chamber, is required. Also in this case, it is inevitable that the exhaust port must be provided on the upper side of the valve chamber for replacement as described above.

[0004]

[Problems to be Solved by the Invention] The connection shape of the air vent for horizontal mounting is usually screwed. Therefore, when the main body is screwed and mounted on the corresponding equipment, the exhaust port is located just above the upper part of the valve chamber. Should be located in
There is a problem that air cannot be exhausted when located at the lower part. If the screws are slightly loosened just above, fluid may leak during use. If the connection shape is a flange type, the problem can be solved, but in this case, the overall shape becomes too large, which goes against the original purpose.

Accordingly, a technical problem of the present invention is to provide an air vent for horizontal mounting in which an exhaust port can be located above a valve chamber after the main body is completely mounted on a corresponding device.

[0006]

The technical means of the present invention, taken to solve the above-mentioned problems, comprises a main body having an inlet on the side and a side located off the center, which is arranged on the other side of the main body. A valve chamber is formed by a cover member provided with an exhaust port, and a float valve that opens and closes the exhaust port is disposed in the valve chamber, and the cover member rotates so that the provided exhaust port is positioned above the valve chamber. It is arranged to be movable.

[0007]

[Operation] First, the main body is screwed into the corresponding device and completely attached and fixed. At this time, since the cover member rotates together with the main body, it is not known at which position the exhaust port stops in the last closed state. For example, when the exhaust port is located at the lower part of the valve chamber, it is moved to the upper part of the valve chamber by rotating the rotatable cover member. As a result, the air and the liquid are smoothly replaced in the valve chamber, and the air is discharged from the upper part of the valve chamber.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific example of the above technical means will be described. (See Figures 1, 2, and 3)

An entrance 2 is provided at the side of the main body 1 which is horizontally arranged and has a substantially cylindrical shape.
And a pipe screw 30 is provided on the outer periphery thereof, and the other side is fully opened. A circular cover 3 is brought into contact with this opening surface via a gasket 7, and the cover 3 is fixed by screwing with the main body 1 with a cap nut 5 to form a valve housing, and a valve chamber 4 is formed inside. I do. Reference numeral 9 denotes an O-ring, which maintains airtightness with a corresponding device. On the circular cover 3, a valve seat holding member 11 is screwed on a side part off the center, in the upper part in the figure,
An empty room 14 is formed between the partition 13 and the partition 13. The vacant chamber 14 and the valve chamber 4 communicate with each other through a communication hole 15 formed in the partition wall 13.

A tapered concave portion 16 is formed in the valve seat holding member 11 on the side of the empty space 14. On the other hand, a larger-diameter cylindrical concave portion 17 is formed outside the valve seat holding member 11, and the valve seat member 22 is fitted therein,
Secure with snap ring 18. 19 is an O-ring and 20 is an exhaust port. Partition wall between the cylindrical recess 17 and the tapered recess 16
A small-diameter through-hole is formed in 21, and an annular projecting valve seat 6 at the tip of a valve seat member 22 penetrates and projects into the tapered recess 16. Reference numeral 8 denotes a lever disposed through the communication hole 15, one end of which forms a flange 23, and holds a valve body 10 that contacts the valve seat 6. The valve body 10 is made of rubber or synthetic rubber so as to have good airtightness.

The outer periphery of the flange 23 is formed into a spherical surface so as to make smooth contact with the inner wall of the tapered recess 16. In addition, flange 23 and partition
A coil spring 24 is disposed in a compressed state between the valve body 13 and the valve spring 13 to elastically urge the valve body 10 toward the valve seat 6. The other end of the lever 8 is connected to a connection hole 26 of a float 25 housed in the valve chamber 4.
Penetrates. The float 25 has a cylindrical shape whose upper and lower surfaces are cut in a plane. A connection hole 26 is formed in the upper portion, and a ventilation groove 27 is formed in the surface on the inlet 2 side. The center of gravity of the float is below the center and always maintains the state of FIG. 1, and FIG. 1 shows a state in which the float is raised to the highest position.

Next, the operation will be described. To explain the mounting procedure, first, a tool is applied to the nut portion 32 of the main body 1 and screwed into a corresponding device, and then completely tightened. Next, the cap nut 5 is slightly loosened, the cover 3 is rotated, the valve seat holding member 11 is moved so as to be positioned directly above, and the cap nut 5 is tightened again to tightly fix the cover 3 to the main body.

When there is little air in the valve chamber 4 and there is water up to a predetermined water level, the float 25 floats as shown in FIG. 1, the lever 8 is free from the action of the float 25, and the valve body 10 is Is pressed by the valve seat 6 by the elastic urging force and the fluid pressure of the valve to maintain the valve closed. Next, when air enters the valve chamber 4 from the inlet 2, the water in the valve chamber exits to the inlet 2 at the same time, and the replacement is performed. As a result, the water level in the valve chamber 4 decreases and the float 25
When the buoyancy acting on the lever 8 is reduced, it descends by its own weight, and a downward force is applied to the lever 8. When the lever 8 is displaced, the valve 10
Opens the discharge port 20, and the air in the valve chamber 4 is discharged.

[0014]

According to the present invention, the exhaust valve port can be moved to the upper part of the valve chamber after the main body is attached to the corresponding device, so that the main body can be completely tightened. Also,
Since the exhaust valve port is located at the top, the pipe connection can be made very small as a whole as compared with a flange type connection.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air vent according to an embodiment of the present invention.

FIG. 2 is a front external view of FIG. 1;

FIG. 3 is a left side view of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 3 Cover 4 Valve room 5 Cap nut 6 Valve seat 8 Lever 10 Valve body 25 Float

Claims (1)

(57) [Scope of request for utility model registration] A valve chamber is formed by a main body having an inlet on the side and a cover member provided on the other side of the main body and having an exhaust port on an off-center side, and the exhaust port is formed in the valve chamber. An air vent, wherein a float valve for opening and closing the valve is disposed, and the cover member is rotatably disposed such that an exhaust port provided is located above a valve chamber.