JPH07229570A - Ball valve device - Google Patents

Abstract

PURPOSE:To prevent a member for positioning a valve seat and a ball valve from being loosened and to surely position the member. CONSTITUTION:In an inner circumference part of a main body 12, annular groove parts 19, 20, in which C-rings 21, 22 are installed, are formed on the outside of valve seats 16, 17. By means of them C-rings 21, 22, the valve seats 16, 17 and a ball valve 15 are positioned (positioning in the main body 12 extension direction). Two coned disc springs 24, 24 are arranged between the valve seat 17 on the right side and the C-ring 22, and the valve seat 17 is energized in the arrow A direction by energizing force of the coned disc springs 24, 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball valve device equipped with a ball valve that opens and closes a flow path by rotating.

[0002]

2. Description of the Related Art An example of a conventional structure of a ball valve device provided in a water pipe or the like will be described with reference to FIG. The main body 2 forming the flow path 1 is made of cast metal and has a tubular shape. Inside the main body 2, an annular valve seat 3, a ball valve 4 having a through hole 4a, and an annular valve seat 5 are sequentially inserted from one side (the right side in FIG. 4) of the flow path 1. Are arranged. The valve seat 3 on the back side (left side) is positioned by the receiving portion 2 a formed on the inner peripheral portion of the main body 2.

An inner cylinder 6 having female screw portions 2b formed on both the left and right sides of the inner peripheral portion of the main body 2 and a male screw portion 6a formed on the outer peripheral portion of the main body 2 is screwed into the female screw portion 2b on the right side. It is screwed to the right side of the inner peripheral portion of the main body 2 by being combined. The inner cylinder 6 prevents the valve seat 5 on the right side from coming off, and positions the valve seats 3, 5 and the ball valve 4 (positioning in the extending direction of the main body 2).
A water pipe (not shown) is connected to the left and right sides of the main body 2.

The ball valve 4 is rotatably supported between the valve seats 3 and 5. The ball valve 4 is fitted with one end of a valve rod 7 penetrating the peripheral wall of the main body 2. A handle (not shown) is attached to the valve rod 7,
By operating the handle, the ball valve 4 is rotated within a range of about 90 degrees through the valve rod 7 to open and close the flow path 1 of the main body 2. In this case, the inner diameter of the through hole 4a of the ball valve 4 is set to be smaller than the inner diameter of the flow passage 1 of the main body 2.

[0005]

However, in the above-mentioned conventional structure, the inner cylinder 6 for preventing the valve seat 5 from coming off is attached to the inner peripheral portion of the main body 2 by screwing. Therefore, the inner cylinder 6 may be loosened. Further, since the position of the inner cylinder 6 changes depending on the degree to which the inner cylinder 6 is tightened, there is a problem that the position of the inner cylinder 6 with respect to the valve seat 5 is not constant. Furthermore, the inner cylinder 6
In order to attach the
In addition to forming b, it is necessary to form the male screw portion 6a on the inner cylinder 6, and there is also a problem that the machining thereof is troublesome.

Therefore, an object of the present invention is to prevent the member for positioning the valve seat and the ball valve from being loosened, to ensure the positioning of the member, and to perform the processing for mounting the member. An object is to provide a ball valve device that can be easily made.

[0007]

In order to achieve the above-mentioned object, a ball valve device of the present invention has a cylindrical main body which forms a flow path, and inside the main body from both sides in the extending direction thereof. Two valve seats arranged so as to face each other, and rotatably arranged inside the main body between the two valve seats, and the rotation opens and closes the flow path through a through hole. A ball valve, a valve rod for radially rotating the peripheral wall portion of the main body for rotating the ball valve, and an outer peripheral surface of the valve seat on the inner peripheral portion of the main body. The present invention is characterized by comprising two groove portions formed by being positioned, and two retaining rings attached to these both groove portions to prevent the two valve seats from coming off. (Claim 1).

In this case, it is preferable that the main body is composed of a non-cast pipe. Further, it is preferable that an elastic body is interposed between the one valve seat and the retaining ring (claim 3).

[0009]

According to the means of claim 1, a retaining ring is used as a member for positioning the valve seat and the ball valve. Since the retaining ring is attached to the groove formed in the inner peripheral portion of the main body, unlike the conventional case where the inner cylinder is screwed into the main body, no loosening occurs. Further, since the mounting position of the retaining ring is determined by the position of the groove portion, the positioning can be surely performed. Moreover, since the structure for attaching the retaining ring only needs to form the groove portion on the inner peripheral portion of the main body, the processing can be simplified.

According to the second aspect of the present invention, the main body can be made thinner and lighter in weight as compared with the case of being manufactured by casting. According to the means of claim 3, since a constant load is applied between the valve seat and the ball valve by the urging force of the elastic body, even if the valve seat is plastically deformed, the valve seat and the ball valve are not deformed. Can always be pressed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Main body 12 forming the flow path 11
Has a tubular shape, and in this embodiment, is made of a non-cast pipe. Fitting grooves 13 are formed on the outer peripheral portions on the left and right sides of the main body 12. This fitting groove 13 is
It is for fitting a connector when connecting the main body 12 and a water pipe (not shown).

A ball valve 15 having a through hole 14 whose inner diameter is set to be smaller than the inner diameter of the flow path 11 is provided at substantially the center of the body 12.
On the left and right sides of the ball valve 15, two annular valve seats 16 and 17 made of fluororesin are provided. Therefore, these two valve seats 16 and 17 are arranged inside the main body 12 so as to face each other from both sides in the extending direction thereof. O-rings 18 for sealing with the inner peripheral portion of the main body 12 are attached to the outer peripheral portions of both valve seats 16 and 17, respectively.

At the inner periphery of the body 12, both valve seats 16,
Annular groove portions 19 and 20 are formed on the outer side of 17, and C rings 21 and 22 as retaining rings are attached to the groove portions 19 and 20, respectively. Both C-rings 21 and 22
Are attached in the main body 12 in a contracted state, and are attached by being pressed against the groove portions 19 and 20 by the expanding force from the contracted state.

A backup ring 23 is interposed between the valve seat 16 and the C ring 21 on the left side in FIG. 1, and a backup ring 23 is interposed between the valve seat 17 and the C ring 22 on the right side. And two disc springs 2 as elastic bodies
4, 24 are interposed. The urging force of these disc springs 24 urges the right valve seat 17 in the left direction (direction of arrow A).

A circular hole 25 is formed in the central portion of the main body 12 corresponding to the ball valve 15, and a guide tube 26 having one end inserted into the hole 25 is fixed by welding. ing. A valve rod 27 is provided in the guide cylinder 26.
1 is rotatably inserted, and one end of the valve rod 27, which is the lower end in FIG. 1, is fitted to the ball valve 15 so as to rotate integrally with the ball valve 15. A handle 28 is attached to an upper portion of the valve rod 27 so as to extend in a direction orthogonal to the extending direction of the valve rod 17, and the ball valve 15 is rotated via the valve rod 27 by the turning operation of the handle 28. It is supposed to be moved.

At the upper end of the inner peripheral portion of the guide cylinder 26, the valve rod 2
A valve rod C ring 29 is attached to prevent the valve rod 7 from coming off, and the valve rod 27 is attached to the outer peripheral portion of the valve rod 27 in the vertical direction.
An O-ring 30 for sealing between the guide tube 26 and the guide tube 26 is attached. An opening 31 through which the handle 28 penetrates is formed in the peripheral wall portion of the guide cylinder 26 at a portion corresponding to the handle 28. The opening 31 allows the handle 28 to rotate, and thus the ball valve 15 to rotate. The range is set to about 90 degrees.

In this embodiment, the main body 12, the valve rod 27, and the handle 28 are made of electroless nickel plating.

In the above structure, the handle 28 has the main body 1
In the state in which the through hole 14 of the ball valve 15 is rotated to a position oriented in the same direction as the extending direction of the passage 2,
1 and the valve device is in an open state (see FIG. 1).

When the handle 28 is rotated about 90 degrees in the direction of arrow B in FIG. 2, the ball valve 15 is rotated about 90 degrees via the valve rod 27. Accordingly, the through hole 14
Is orthogonal to the flow path 11 of the main body 12, the flow path 11 is blocked by the ball valve 15, and the valve device is closed.

According to the above-mentioned embodiment, the valve seats 16 and 17 are
C-rings 21 and 22 are used as members for positioning the ball valve 15 and the C-rings 21 and 22.
Since it is attached to the groove portions 19 and 20 formed on the inner peripheral portion of the main body 12, unlike the conventional case where the inner cylinder is screwed into the main body, no loosening occurs. Further, since the mounting positions of the C rings 21 and 22 are determined by the processing positions of the groove portions 19 and 20, the positioning can be surely performed.
Moreover, since the structure for attaching the C rings 21, 22 only needs to form the groove portions 19, 20 in the inner peripheral portion of the main body 12, the machining is easier than in the case of forming the male screw portion and the female screw portion. There is also an advantage.

Further, according to the above embodiment, the main body 12
Since it is composed of a non-cast pipe, there is an advantage that the wall thickness can be made thinner and the weight can be reduced as compared with the case where the main body is manufactured by casting. Further, since other members can be welded to the main body 12, it is possible to easily provide a fitting protrusion for fitting a connector in place of the fitting groove 13 on the outer peripheral portion, for example.

Further, according to the above embodiment, the disc springs 24, 2 are provided between the valve seat 17 and the C ring 22 on the right side in FIG.
4 is interposed and a constant load is applied between the valve seats 16 and 17 and the ball valve 15 by the biasing force of the disc springs 24 and 24, so that the valve seats 16 and 17 are plastically deformed. As such, the valve seats 16 and 17 and the ball valve 15
There is also an advantage that and can always be pressed.

As the elastic body, a coil spring or the like may be used instead of the disc spring 24.

[0024]

According to the ball valve device of the first aspect,
A retaining ring is used as a member for positioning the valve seat and the ball valve, and since the retaining ring is attached to the groove formed in the inner peripheral portion of the main body, it does not loosen. Further, since the mounting position of the retaining ring is determined by the position of the groove portion, the positioning can be surely performed. Moreover, since the structure for attaching the retaining ring only needs to form the groove portion on the inner peripheral portion of the main body, the processing can be simplified.

According to the ball valve device of the second aspect, since the main body is composed of the non-cast pipe, the wall thickness can be made thinner and the weight can be reduced as compared with the case where the pipe is manufactured by casting. You can

According to the ball valve device of the third aspect, an elastic body is interposed between one valve seat and the retaining ring, and a constant load is applied between the valve seat and the ball valve by the urging force of the elastic body. Therefore, even if the valve seat is plastically deformed, the valve seat and the ball valve can always be brought into pressure contact with each other.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

2 is a plan view

[Fig. 3] Right side view

FIG. 4 is a diagram corresponding to FIG. 1 showing a conventional configuration.

[Explanation of symbols]

11 is a flow path, 12 is a main body, 14 is a through hole, 15 is a ball valve, 16 and 17 are valve seats, 19 and 20 are groove portions, 21 and 22.
Is a C ring, 24 is a disc spring (elastic body), 27 is a valve rod, 2
Reference numeral 8 is a handle.

Claims (3)

[Claims] 1. A tubular main body that forms a flow path, two valve seats that are disposed inside the main body so as to face each other from both sides in the extending direction thereof, A ball valve that is disposed between both valve seats and is rotatably disposed, and that pivotally opens and closes the flow path through a through hole; and a peripheral wall portion of the main body that penetrates in a radial direction. A valve rod for rotating the ball valve, two groove portions formed on the inner peripheral portion of the main body outside the valve seats, and attached to the groove portions. A ball valve device comprising two retaining rings for retaining both valve seats. 2. The ball valve device according to claim 1, wherein the main body is made of a non-cast pipe. 3. The ball valve device according to claim 1, wherein an elastic body is interposed between the one valve seat and the retaining ring.