JPS5916600Y2 - control valve - Google Patents

Description

[Detailed description of the invention] This invention relates to a control valve that has flow control characteristics suitable for a specific application, and is designed to easily obtain the flow control characteristics for a specific application without performing any special processing on the valve body. The purpose of the present invention is to provide a control valve with a new design.

The present applicant installs an elastic sealing member between the valve body and the valve body, and further forms a stepped portion by turning the portion of the valve body where the sealing member is installed. We proposed a control valve in which a metal control member with a specific shaped orifice is attached to the crotch part and overlapped with a sealing member.

(Refer to Utility Model Publication No. 50-11238.) With this, it is possible to obtain flow rate control characteristics suitable for various specific applications simply by replacing the control member, and the sealing is performed using an elastic sealing member, so the sealing performance is improved. Good too.

However, with the above configuration, the step part must be turned on the valve body, which has the drawback of increasing the number of machining steps and manufacturing costs.Furthermore, the control member is located at a position that does not interfere with the rotation of the valve body. In order to dispose the seal member and the control member, a guide ring or the like must be interposed between the seal member and the control member, which requires a large number of components and is expensive as a whole.

In particular, the control member described above has a control orifice formed in the center of the disk to obtain flow control characteristics suitable for various uses, but its mounting position is on the back side of the fitting groove of the seal member. Moreover, in order to avoid interference with the valve body, the control orifice is installed at a distance from the outer circumferential surface of the valve body via a guide ring, so there is a large gap between the control orifice and the outer circumferential surface of the valve body. However, there is a drawback that flow rate control, especially small flow rate control, cannot be performed precisely.

In view of the above-mentioned conventional drawbacks, this invention improves and eliminates them by attaching the control member directly to the liquid passage hole of the valve body and the inner peripheral surface of the sealing member, and attaching the end surface of the control member on the valve body side to the valve body. By creating a tapered surface that follows the spherical outer surface of the valve body, it provides highly accurate flow control characteristics.Moreover, it does not require any special processing on the valve body, and the number of parts is reduced, making it simple and inexpensive. It is designed to be configurable.

The configuration of this invention will be explained below according to embodiments shown in the drawings.

In FIG. 1, 1 and 2 are valve bodies in which liquid passage holes 3 and 4 are formed, respectively, and 5 is a valve body in which a through hole 6 is formed in the center part, and is rotatably arranged in the valve bodies 1 and 2. Valve body, 7 is valve body 5
8 is a pivot-type lower bearing that rotatably supports the valve body 1; 8 is an operating shaft that is rotatably arranged through the upper part of the valve body 1 and whose lower end is locked to the upper end of the valve body 5; 9 and 9' are the valve body; 1
, 2 (L3. A sealing member such as Teflon that is fitted and fixed to the inner end of 4 contacts the outer peripheral surface of the valve body 5 to prevent fluid leakage.

10 indicates whether the valve body 1 or 2 is connected to one of the liquid passage holes 3 or 4.
A control member attached and fixed to the inner end of the seal member 9 or 9' and the inner peripheral surface of the seal member 9 or 9'.The control member is made of a thin metal disk and has a characteristic cross-sectional shape in the center as shown in Figure 2. The orifice 11 is shaped and placed in a position that does not interfere with the four rotations of the valve body 5, and is fixed by welding or the like after installation.

Control orifice 1 of the control member 10
Each control orifice 1 is formed in accordance with a specific purpose of use, and is not limited to the illustrated example, but may be formed in various shapes that can provide optimal flow control characteristics depending on the use, and the control orifice 1
The end portion of the side opposite to the valve body 5 is tapered as shown in FIG. 3 so as not to interfere with the valve body 5.

Furthermore, the mounting of the control member 10 is not limited to the above-mentioned embodiment, and as shown in FIG. , may be fixed.

In addition, as shown in FIG. 5, the control member 12 is shaped into an L-shaped cross section, an annular groove 14 is formed in a part of the seal member 13, and the control member 12 is attached to the seal member mounting portion of the valve body 2. It may be fixed and the vertical portion 12' may be fitted into the annular groove 14 of the sealing member 13.

In these embodiments, the control members 10, 12 can be replaced.

As explained above, this invention includes a valve body having liquid passage holes on both sides, a spherical or hemispherical valve body having a through hole and rotatably arranged inside the valve body, and a valve body having In a control valve consisting of a sealing member that is fitted and fixed to the part of the liquid passage hole that contacts the valve body, and a control member installed in one of the liquid passage holes, the control member is attached to the inner circumferential surface of the sealing member. In addition, since the end surface of the control member on the valve body side is formed into a tapered surface along the spherical outer surface of the valve body, the control member can be placed as close as possible to the spherical outer surface of the valve body, thereby controlling the flow rate and In particular, it is possible to precisely perform high-precision flow rate control even in the case of a small flow rate, and in addition, the number of parts and processing steps can be reduced, and the wall thickness of the valve body at the part where the control roll member is attached is thin. Of course, without losing the advantage that a control valve with desired flow characteristics can be easily obtained by using control members having various flow characteristics with different control orifice shapes,
It has the advantage of being available at a low price.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a control valve according to the present invention, FIG. 2 is a vertical front view showing a control member according to the present invention, FIG. 3 is a vertical side view thereof, and FIGS. 4 and 5 are FIG. 7 is a sectional view of main parts showing another embodiment of the control valve. 1.2... Valve body, 3, 4... Liquid passage hole, 5... Valve body, 9, 9'... Sealing member, 10. ...Control member, 11...
...Control orifice.

Claims (1)

[Scope of utility model registration request] A valve body having liquid passage holes on both sides, a spherical or hemispherical valve body having a through hole and rotatably disposed within the valve body, and contacting the valve body of the liquid passage hole of the valve body. In a control valve consisting of a sealing member that is fitted and fixed to one part and a control member disposed in one of the liquid passage holes, the control member is attached directly to the inner circumferential surface of the sealing member, and A control valve characterized in that the end surface of the control member on the valve body side is formed into a tapered surface along the spherical outer surface of the valve body.