JP2581514Y2 - Butterfly valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve, which is used, for example, as an intake control valve.
The present invention relates to a butterfly valve capable of controlling a fluid flowing through a port by opening and closing the port.

[0002]

2. Description of the Related Art Conventionally, a butterfly valve as shown in FIGS. 10 and 11 is generally known as this kind. That is, FIG. 10 and FIG.
In the butterfly valve shown in FIG. 1, a shaft 24 is rotatably provided in a body 21 having a port 22 so as to penetrate through the port 22, and a portion of the shaft 24 located inside the port 22 closes the port 22. A plate-like valve 28 having a possible size is fixed. By rotating the shaft 24, the valve 28 swings in the port 22.
2 is opened and closed.

In FIG. 10 and FIG.
Has a port 22 through which fluid flows, and the inside of the body 21 has an insertion hole 2
3 is drilled across the center of port 22.

A shaft 24 is inserted into an insertion hole 23 of the body 21.
Are inserted in a freely rotatable state. This shaft 24
As shown in FIG. 12 and FIG.
Mounting hole 2 formed in a slit shape and large enough to allow
6, and a screw hole 25 is formed so as to be orthogonal to the mounting hole 26.

[0005] The shaft 24 is provided so as to penetrate across the port 22, whereby the mounting hole 26 is disposed so as to be located inside the port 22 of the body 21. At this time, the shaft 24 whose outer diameter is smaller than the inner diameter of the port 22 is used so that the port 22 which is a fluid flow path is not closed by the shaft 24.

A valve 28 is provided in a mounting hole 26 of the shaft 24.
Is attached. As shown in FIGS. 14 and 15, the valve 28 has a disk shape capable of closing the port 22, and two screw holes 30 are formed so as to be located on the center line. Have been.

The valve 28 is connected to the shaft 24
The valve 28 is integrated with the shaft 24 by inserting the screw hole 30 of the valve 28 into the screw hole 25 of the shaft 24 so as to match with the screw hole 25 of the shaft 24. Is fixed.

At this time, the valve 28 is arranged so that its center line is aligned with the axis of the shaft 24, so that the valve 28 can swing about the axis of the shaft 24. Keep it. Therefore, when the shaft 24 rotates, the valve 28 swings inside the port 22 to open and close the port 22 with the rotation of the shaft 24.

With the butterfly valve having the above-described structure, when the shaft 24 is rotated, the valve 30 fixed to the shaft 24 swings inside the port 22 with the rotation. ,by this,
The port 22 is opened and closed by the valve 28, and the flow rate of the fluid flowing through the port 22 is controlled.

However, in such a butterfly valve, it is difficult to position the valve 28 in the port 22 with respect to the shaft 24.

That is, in the conventional butterfly valve as described above, since no positioning means for the valve 28 is provided, when the valve 28 is mounted on the shaft 24 inside the port 22, the experience of the mounting Therefore, the assembling workability tends to be low because the intuition must be relied on.

In other words, the valve 28 must be arranged so that the center of the valve 28 coincides with the center of the port 22 because of the operability in the port 22 and the positioning of the screw with respect to the shaft 24. In the above case, the valve 28 is moved along the port 22 so that the valve 28
While confirming the operability in the port 22 of the valve 28,
Is fixed to the shaft 24, and the screw 3
1 had to be screwed.

In particular, when the valve 28 does not have a disk shape such as a semicircular shape, the inconvenience in assembling is remarkable, and the workability may be greatly reduced. .

This invention solves the above problems,
An object of the present invention is to provide a butterfly valve that can be easily and reliably assembled.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by providing a shaft rotatably in a body having a port so as to penetrate the port and cross the port. a portion of the shaft located, shea
A mounting hole penetrating the shaft in a direction perpendicular to the axis,
And a hole that penetrates the hole in a direction perpendicular to the axis.
A plate-shaped valve is inserted into the hole, and the valve is inserted into the hole.
Fixed to the shaft by a fixed fixing member.
The butterfly valve , the axis of the mounting hole
A projection or a groove at both ends in the direction.
Or, the convex portion or the groove is provided at the position of the valve corresponding to the concave groove.
With means provided with a concave groove or a convex portion that engages with
is there.

[0016]

[Function] This invention adopts the above-mentioned means,
When the shaft is rotated, the valve attached to the shaft is simultaneously rotated to open and close the port, whereby the flow rate of the fluid flowing through the port is controlled.

According to the present invention, the valve can be easily and reliably mounted on the shaft.

That is, a convex portion or a concave groove is formed on the valve, and a concave groove or a convex portion engaging with the convex portion or the concave groove is formed on the shaft. When the valve is mounted on the shaft in the port, the convex portion or the concave portion is formed. By engaging the groove with the groove, the engagement position between the protrusion and the groove is set to a suitable mounting position of the valve with respect to the shaft in the port.

That is, the mounting position of the valve in the port is significantly related to the operability of the valve. Therefore, it is important to determine the position. In this invention, when mounting the valve on the shaft, By engaging the convex portion or concave groove formed on the valve with the concave groove or convex portion formed on the shaft, the positioning of the valve with respect to the shaft is easily performed. And it can be performed reliably.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below.

FIGS. 1 and 2 show an embodiment of the butterfly valve according to the present invention. That is, FIG.
And a butterfly valve shown in FIG. 2, a shaft 4 is rotatably provided in a body 1 having a port 2 so as to penetrate the port 2.
A plate-shaped valve 8 having a size capable of closing the port 2 is attached to a portion located inside the
And the shaft 4 is provided with a concave groove 7 which engages with the convex portion 9 of the valve 8 so that the position of the valve 8 relative to the shaft 4 in the port 2 is determined. . By rotating the shaft 4, the valve 8 swings in the port 2, whereby the valve 8 opens and closes the port 2.

1 and 2, a body 1 has a port 2 through which a fluid flows, and an insertion hole 3 is provided in the body 1 to accommodate a port 2 therein.
It is drilled across the center of the.

A shaft 4 is rotatably inserted into the insertion hole 3 of the body 1. As shown in FIGS. 3 and 4, the shaft 4 has a size in which a valve 8 to be described later can be inserted. And two screw holes 5 are formed so as to be orthogonal to the mounting holes 6.

At this time, the concave groove 7 of the shaft 4 is formed at both ends of one opening of the mounting hole 6 so as to open to the outer peripheral surface of the shaft 4. , A convex portion 9 of the valve 8 described later can be inserted.

The shaft 4 is provided so as to penetrate across the port 2, whereby the mounting hole 6 is arranged so as to be located inside the port 2 of the body 1. At this time, the shaft 4 whose outer diameter is smaller than the inner diameter of the port 2 is used so that the port 2 which is a fluid flow path is not blocked by the shaft 4.

A valve 8 is mounted in the mounting hole 6 of the shaft 4. As shown in FIGS. 5 and 6, the valve 8 has a disk shape capable of closing the port 2, and has a groove formed in the mounting hole 6 of the shaft 4 on one of its plate surfaces. A protrusion 9 is formed in a shape that can be engaged with the valve 7, and two screw holes 10 are formed at equal intervals so as to be located on the center line of the valve 8.

The valve 8 is inserted into the mounting hole 6 of the shaft 4, the convex portion 9 is arranged in a state of being engaged with the concave groove 7 of the shaft 4, and screwed with a screw 11 in this state. Thereby, the valve 8 is integrally fixed to the shaft 4.

At this time, the convex portion 9 of the valve 8 and the shaft 4
The relative position of the concave groove 7 is set in advance so that when these are engaged, the screw hole 10 of the valve 8 and the screw hole 5 of the shaft 4 coincide with each other.
An engagement position between the convex portion 9 and the concave groove 7 is determined as an attachment position of the valve 8 to the shaft 4 in the port 2.

In this case, the valve 8 is arranged so that its center line coincides with the axis of the shaft 4, whereby the valve 8 swings around the axis of the shaft 4. Make it possible. Therefore, when the shaft 4 rotates, the valve 8 swings inside the port 2 to open and close the port 2 with the rotation of the shaft 4.

Next, the operation of the above will be described.

With the butterfly valve having the above construction, when the shaft 4 is rotated, the valve 8 fixed to the shaft 4 swings inside the port 2 with the rotation. , So that port 2
Is opened and closed by the valve 8, and the flow rate of the fluid flowing through the port 2 is controlled.

In the above butterfly valve, the valve 8 can be easily positioned with respect to the shaft 4 in the port 2.

That is, a convex portion 9 is formed in the valve 8, a concave groove 7 engaging with the convex portion 9 is formed in the shaft 4, and when the valve 8 is mounted on the shaft 4 in the port 2, Since the position where the convex portion 9 and the concave groove 7 of the shaft 4 are engaged is the most suitable mounting position of the valve 8 in the port 2, the mounting of the valve 8 to the shaft 4 in the port 2 is performed. Can be done easily.

That is, in the above case, the mounting position of the valve 8 in the port 2 has a great relationship with the operability of the valve 8 in the port 2 and the screwing position of the valve 8 on the shaft 4. In mounting the valve 8 on the shaft 4, by engaging the convex portion 9 of the valve 8 with the concave groove 7 of the shaft 4, the engaged position and the state thereof are changed to the shaft position in the port 2. Since the optimum mounting position of the valve 8 relative to the valve 4 is determined, the mounting operation and the assembling operation can be easily performed.

FIG. 7 shows a modification of the above embodiment.

That is, the butterfly valve shown in FIG. 7 uses a semicircular valve 18 as shown in FIGS. 8 and 9 instead of the valve 8 used in the butterfly valve shown in FIG. Since other configurations are the same as those of the above embodiment, detailed description of the configurations is omitted by attaching the same reference numerals.

As described above, when the valve 18 is formed in a semicircular shape, it is particularly difficult to determine the mounting position of the valve 18 with respect to the shaft 4, but it is also shown in FIGS. 8 and 9. As described above, the convex portion 9 is formed on the valve 18, the concave groove 7 engaging with the convex portion 9 is formed on the shaft 4, and when the convex portion 9 of the valve 18 engages with the concave groove 7 of the shaft 4. The valve 18 is suitably positioned with respect to the shaft 4 in the port 2 so that the workability of mounting and assembling can be improved.

In the above-described embodiment and its modifications, the convex portions 9 are formed on the valves 8 and 18, and the concave grooves 7 which engage with the convex portions 9 are formed on the shaft 4. However, the present invention is not limited to this. It goes without saying that a concave groove may be formed in the valves 8 and 18 and a convex portion that engages with the concave groove may be formed in the shaft 4.

[0039]

[Effect of the invention] As described above, according to the invention, the shuff
Form protrusions or grooves at both ends in the axial direction of mounting holes
Then, at the portion of the valve corresponding to the convex portion or the concave groove, a convex portion
Or by providing a concave groove or convex portion that engages with the concave groove,
The convex part or concave groove on the shaft side and the concave groove or convex part on the valve side
Simply engage each other,
Positioning is possible, and the diameter within the valve port
And axial positioning is possible, and the valve can be
At a predetermined position.
Therefore, the work of mounting and assembling the valve is easy.
Can be surely done.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a butterfly valve according to the present invention.

FIG. 2 is a diagram showing a view in the direction of arrow A in FIG. 1;

FIG. 3 is a diagram showing a shaft used in the present invention.

FIG. 4 is a diagram showing a view in the direction of arrow B in FIG. 3;

FIG. 5 is a view showing a valve used in the present invention.

FIG. 6 is a diagram showing a view in the direction of arrow C in FIG. 5;

FIG. 7 is a view showing a modification of the butterfly valve shown in FIG. 1;

FIG. 8 is a view showing a valve used in the butterfly valve shown in FIG. 7;

FIG. 9 is a view as viewed from an arrow D in FIG. 7;

FIG. 10 is a diagram showing a conventional example.

FIG. 11 is a diagram showing a view as seen from an arrow E in FIG. 10;

FIG. 12 is a view showing a shaft used in the conventional example shown in FIG.

FIG. 13 is a view as viewed in the direction of arrow F in FIG. 12;

FIG. 14 is a view showing a valve used in the conventional example shown in FIG.

FIG. 15 is a diagram showing a view in the direction of arrow G in FIG. 14;

[Explanation of symbols]

 1, 21 ... body 2, 22 ... port 3, 23 ... insertion hole 4, 24 ... shaft 5, 10, 25, 30 ... screw hole 6, 26 ... mounting hole 7 ... concave groove 8, 18, 28: Valve 9: Protrusion 11, 31, Screw

Claims (1)

(57) [Scope of request for utility model registration] 1. A body having a port, wherein a shaft is rotatably provided in a state penetrating across the port, and a shaft portion located inside the port is provided with a shaft.
And a mounting hole that penetrates in a direction perpendicular to the axis,
A hole penetrating in a direction perpendicular to the axis is provided.
A plate-shaped valve is inserted, and the valve is inserted into the hole.
Fixed to the shaft by a fixed member
In the butterfly valve , the axial direction of the mounting hole is
Protrusions or grooves are provided at both ends, and
Engage with the convex or concave groove at the portion of the valve corresponding to the groove
A butterfly valve provided with a concave groove or a convex portion .