JPS6151713B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve body used in a fluid control valve such as a check valve for controlling the flow rate and pressure of a fluid such as air or water in a certain direction.

Although various valve bodies for fluid control valves have been developed in the past, an object of the present invention is to provide a cone-shaped diaphragm made of an elastic material with a cone-shaped diaphragm having an outer circumferential edge that comes into contact with the flow path wall surface of the diaphragm, and the vicinity thereof. The purpose of the present invention is to provide a valve body provided with a plurality of appropriately spaced protrusions extending in the fluid flow direction at equal intervals, except for the ends.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows a valve body 1, which is composed of a diaphragm 2 and a cap member 3 attached to the diaphragm 2, and has a through hole 4 extending along the axis thereof. The diaphragm 2 shown in FIG.
It is formed of synthetic rubber to have a cone shape, and the diameter of its outer periphery, which is the largest diameter part, is set so that the valve body 1 comes into contact with the wall surface of the flow path through which the fluid in which the valve body 1 is to be installed is disposed at this outer periphery. has been done. Further, the opposite outer peripheral edge end, which is the smallest diameter part, of the diaphragm 2 is formed thick so that it can be fitted into a suitable support body that supports the valve body 1 when it is provided in the flow path. . The cap member 3 shown in FIG. 3 is provided with a large number of protrusions extending in the fluid flow direction at equal intervals on the outer periphery of the diaphragm 2, excluding the outer periphery and the edges near the diaphragm 2. It is attached to the diaphragm 2, and a large number of protrusions 5 (12 in this embodiment) are provided on the outer periphery of the diaphragm 2, extending in the axial direction at equal intervals. The outer surfaces of these protrusions 5 are
It protrudes in the diametrical direction and extends parallel to the axis so as to come into contact with the wall surface of the flow path. Note that the cap member 3
is preferably made of a material that can withstand the fluid pressure applied to the diaphragm 2, such as synthetic resin or hard rubber.

Next, a pneumatic control valve using the valve body 1 configured as described above will be explained. In Figure 4, 6
is a substantially cylindrical main body, and its through-hole portion constitutes a flow passage 7. The upper wall of the flow passage 7 is provided with a female threaded portion 8, and the central portion thereof has a continuous thread extending in the circumferential direction. A passage 9 is communicated with the passage 9, and its lower part is enlarged in diameter. Reference numeral 10 denotes a pipe joint fixed to the main body 6 so as to communicate with the communication path 9 at its through-hole portion. Reference numeral 11 designates a flange portion 12 on the inner wall of the lower end of the main body 6 to be located in the enlarged diameter portion of the flow path 7.
It is a substantially cylindrical support body which is caulked at the bottom, and its axis coincides with the axis of the main body 6. A stepped portion 13 is formed in the flange portion 12, and six communication holes 14 (however, two (Only shown) are transparent. The upper surface of the cap member 3 is brought into contact with the upper surface of the stepped portion 13, and the diaphragm 2 is opened in the direction opposite to the flange portion 12, so that the above-mentioned valve body 1 is tightly fitted to the support body 11, and the upper end is It is prevented from coming off by the caulked presser ring 15. The valve body 1 is in contact with the wall surface of the flow path 7 at the outer peripheral edge of the diaphragm 2 and the outer surface of the protrusion 5 of the cap member 3. Reference numeral 16 denotes an adjusting screw screwed into the female threaded portion 8, and an O-ring 17 is fitted into a groove formed on the lower peripheral surface of the adjusting screw. Reference numeral 18 denotes a needle having a tapered circumferential surface extending from the lower end of the adjustment screw 16 so that its axis coincides with the axis of the support 11, and its tip end is at the opposite end of the flange 12 of the support 1. By rotating the adjusting screw 16, the amount of insertion can be adjusted freely. Reference numeral 19 designates a lock nut that is screwed into engagement with the adjustment screw 16.

Next, the operation of this air pressure control valve will be explained. When the airflow flows in the direction of the arrow shown in FIG. freely flows from the communication path 9 to the pipe joint 10. At this time, the airflow is rectified by the action of each protrusion 5, and the gap with the wall surface of the flow path 7 is reliably maintained. Conversely, when the airflow flows in the direction of the arrow shown in Figure 4b,
When the cone of the diaphragm 2 is opened, its outer peripheral edge and its neighboring ends that are not supported by the respective protrusions 5 come into pressure contact with the wall surface of the flow path 7, so that the air flow is caused by the needle 18, which is adjusted in advance to a desired amount of intrusion. This becomes a controlled flow that is controlled according to the width of the gap with the inner wall surface of the support body 11 into which it has protruded, and flows in the flow path 7 from the direction of the communication path 9 to the direction of each communication hole 14. At this time, since the air pressure applied to the diaphragm 2 is received by each protrusion 5 of the cap member 3, it is not necessary to withstand the air pressure only by the diaphragm 2 itself.

In addition, it is also possible to provide the valve body 1 in the opposite direction in order to control the air flow in the opposite direction to that in the embodiment described above. In this case, there is no particular need to provide the stepped portion 13 on the flange 12 of the support 11, but in addition to the presser ring 15 that presses the diaphragm 2 from below, a presser ring that presses the upper surface of the cap member 3 is provided,
It is necessary to hold the valve body 1 from above and below with a pair of retaining rings. Further, the valve body 1 can be used not only as a control valve for fluids other than air, but also as a simple check valve. When used as this check valve, the through hole 4 is closed depending on the structure that supports the valve body 1. Furthermore, the protrusion 5 may be formed integrally with the diaphragm 2.

In this way, according to the present invention, by providing a plurality of protrusions extending in the direction of fluid flow on the outer periphery of the diaphragm, when the fluid flows in the free direction, it is rectified and the necessary flow space is created. When the diaphragm is secured in the flow path and the fluid flows in the controlled direction, the pressure applied to the diaphragm can be applied to prevent deformation of the diaphragm and reduce fatigue.

Although the present invention has been variously explained above using preferred embodiments, the present invention is not limited to the above-mentioned embodiments, and can be modified in many ways without departing from the spirit of the invention. Of course.

[Brief explanation of the drawing]

The figures show preferred embodiments of the present invention, in which FIG. 1 is an overall plan view, FIG. 2 is a central vertical cross-sectional view of the diaphragm, FIG. 3 is a central vertical cross-sectional view of the cap member, and FIG.
The figure is a central vertical sectional view of a pneumatic control valve using the valve body of the present invention, in which a shows a free flow state and b shows a controlled flow state. DESCRIPTION OF SYMBOLS 1...Valve body, 2...Diaphragm, 3...Cap member, 4...Through hole, 5...Protrusion, 6...Main body, 7...Flow path, 8...Female thread portion, 9...Connection Passage, 10...Pipe joint, 11...Support, 12...Flame, 13...Step, 14...Communication hole, 15...Pressure ring, 16...Adjustment screw,
17...O-ring, 18...needle, 19...
Rotsuknut.

Claims (1)

[Claims] 1. In a fluid control valve that allows the fluid to flow freely in one direction in an appropriate flow path and controls the flow in the opposite direction, a cone-shaped diaphragm made of an elastic material has a cone-shaped diaphragm on its outer periphery. 1. A valve body for a fluid control valve, characterized in that a plurality of protrusions extending in a fluid flow direction are provided at equal intervals except for an outer peripheral edge that contacts a flow path wall surface and an end portion near the outer peripheral edge thereof.