JPH06190214A - Valve having gas or liquid purge mechanism - Google Patents

Abstract

PURPOSE:To provide a valve having a gas or liquid purge mechanism by which residual solid matter, such as powder is removed. CONSTITUTION:In a valve used for closing an opening by bringing a valve plate into contact with a valve packing 1 installed in the opening, the valve packing 1 is provided with a purge means 3 for causing a plane stream parallel to the seal surface between the valve packing 1 and a valve plate to flow.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a valve having a gas or liquid purging mechanism used to close an opening.
In particular, it relates to a valve having a gas or liquid purging mechanism suitable for use in a multifunctional filter.

[0002]

2. Description of the Related Art Heretofore, there has been known an angle valve for closing an opening such as a discharge port of various devices by closing a valve plate by bringing a valve plate into contact with the valve packing. As an example thereof, FIG. 7 shows an angle valve for a multifunctional filter, which the applicant of the present invention has previously proposed as Japanese Patent Application No. 3-281497.

In FIG. 7, reference numeral 31 denotes a valve head which is inserted into the discharge port 30 of the apparatus, has a glass lining for eliminating the hollow of the can body at the time of stirring or filtering, and 32 is a valve head. A valve plate made of Teflon for fixing 31, 33 a shaft for connecting the valve plate 32, 35
Is a first valve chamber connected to the discharge port 30, 36 is a second valve chamber connected to the first valve chamber 35, and 37 is provided between the first valve chamber 35 and the second valve chamber 36. Packing, 38 is outlet 3
A can body nozzle for configuring 0, 39 is the first valve chamber 35
And a valve packing 40 provided between the can body nozzle 38 and the can body nozzle 38.
Is a piston that is connected to the shaft 34 and drives the shaft 34 according to opening and closing of the valve.

[0004]

In the angle valve having the above-mentioned structure, since the parts of the members forming the angle valve that come into contact with the liquid or powder are all made of a corrosion resistant material, the corrosion resistance and wear resistance are improved. Can be good. However, the sealing surface between the valve plate 32 and the valve packing 39, and the valve packing 39 and the first valve chamber 3
There was a problem that solid matters such as powders were likely to remain at the lower boundary portion of No. 5, and these solid matters could not be sufficiently removed. As a result, there is a problem in that these solid substances that cannot be removed get stuck in the sealing surface and impair the sealing property.

The object of the present invention is to solve the above problems,
An object of the present invention is to provide a valve having a gas or liquid purging mechanism capable of removing residual solid matter such as powder.

[0006]

A valve having a gas or liquid purging mechanism of the present invention is a valve used for closing a valve plate by bringing a valve plate into contact with a valve packing provided at the opening. It is characterized in that the valve packing is provided with a purging means for flowing a plane flow parallel to the sealing surface between the valve packing and the valve plate.

[0007]

In the above structure, since the valve packing is provided with the purging means for flowing the plane flow parallel to the sealing surface between the valve packing and the valve plate, the purging means is slightly retracted from the closed state of the valve plate. When the purging gas or liquid is ejected, the gas or liquid passes through the sealing surface between the valve packing and the valve plate, reaches the boundary portion between the valve packing and the first valve chamber, and adheres to these portions. Solid matter such as powder can be removed.

[0008]

The basic structure of an example of a valve having a gas or liquid purging mechanism of the present invention is the same as that of the above-mentioned Japanese Patent Application No. 3-281497 by the applicant, and the description of the same parts will be omitted. In the present invention, Japanese Patent Application No. 3-281497
The difference from the angle valve disclosed in the above publication is the configuration of the valve packing. That is, by changing the structure of the valve packing to the angle valve disclosed in Japanese Patent Application No. 3-281497, a flat flow, preferably a flat flow, parallel to the sealing surface between the valve packing and the valve plate required in the present invention is obtained. A purge means for generating a spiral flow is formed. Less than,
The shape of the valve packing in the present invention will be described.

FIG. 1 is a view showing an example of a valve packing in a valve having a gas or liquid purging mechanism of the present invention. FIG. 1 (a) is a sectional view taken along the center line, and FIG. 1 (b) is a sectional view.
Indicates a semicircle of the plan view. In FIG. 1, a valve 1 having a gas or liquid purging mechanism of the present invention is made of a disc-shaped organic resin such as PTFE and has an opening 2 having a diameter corresponding to a valve head inserted in the center. Then, eight purging devices 3 for supplying a purging gas or liquid to the sealing surface in contact with the valve plate are provided at equal intervals in a semicircle.

As shown in FIG. 1A, the structure of each purging device 3 is a device portion 4 opened on the side surface of the valve packing.
And a communication hole 5 communicating with the device section 4, and a purge hole 6 opened from the communication hole 5 to the sealing surface. The purging operation with the valve 1 having the gas or liquid purging mechanism of this example is performed by inserting the valve head into the opening 2 and opening the valve plate and the valve packing by a few mm without completely contacting each other. It is performed by supplying a gas or liquid for purging from 3. That is, the purge hole 6
The purging gas or liquid ejected from the above contacts the opposing valve plate and becomes a flat flow with respect to the sealing surface, and solid substances such as powder can be removed.

FIG. 2 is a view showing an example of a valve packing in a valve having a gas or liquid purging mechanism of the present invention. FIG. 2 (a) is a sectional view taken along the center line, and FIG. 2 (b) is a sectional view.
Indicates a semicircle of the plan view. In the example shown in FIG. 2, the same members as those in the example shown in FIG.
The description is omitted. In the example shown in FIG. 2, the difference from the example shown in FIG. 1 is that the configuration of the purging device 3 is such that a circumferential groove portion 7 is formed on the sealing surface, and the mounting portion 4, the communication hole 5 and the purge hole The point is that the purge gas or liquid is supplied through the holes 6. The groove 7
Is composed of deep groove portions 8 at both ends and a shallow groove portion 9 at the center. In the example shown in FIG. 2, as shown in the detailed view of FIG. 3, the purge gas or liquid injected from the purge hole 6 differs from the example shown in FIG.
Since a plane flow can be generated against the sealing surface of 0 and the sealing surface of the contacting valve packing 11 and the valve plate 12, the residual solid substance 13 can be removed better than in the example shown in FIG.

FIG. 4 is a view showing an example of the attachment sheet 20 of the valve packing in the valve having the gas or liquid purging mechanism of the present invention. FIG. 4 (a) is a plan view taken along the center line of FIG. b) shows a semicircle of the plan view. The attachment sheet 20 shown in FIG. 4 is set in the groove portion 7 shown in FIG. The attachment sheet 20 has a groove portion 21 having an angle of 15 degrees with respect to the tangential direction of the disc-shaped sheet 20, one end of the groove portion 21 is shorter than the main body 20a of the attachment sheet 20, and has a structure in which gas and the like communicate. Have Therefore, if this attachment sheet 20 is set in the groove portion 7 shown in FIG. 2, the purging gas or liquid supplied from the purging device 3 will flow along the groove portion 21 of the attachment sheet 20, and the above-described embodiment will be described. A spiral flow due to the groove portion 21 can be obtained together with the same planar flow as in (3) above, and the solid matter can be removed even better.

FIGS. 5 and 6 are views showing an example of a valve having a gas or liquid purging mechanism of the present invention having a structure different from that of the valve shown in Japanese Patent Application No. 3-281497 by the present applicant. In the example shown in FIG. 5, the valve packing 1
The structure of No. 1 is similar to that of the above-described example, and the valve is opened and closed by the valve plate 12 by rotating around the hinge 14. Further, in the example shown in FIG. 6, two tapered valve packings 11-1 and 11-2 having different diameters are provided above and below the discharge passage in the valve case 10, and the tapered valve plate 12 is moved up and down. Opens and closes the valve. It goes without saying that the present invention can be suitably implemented even in the valve having the above-described structure.

The present invention is not limited to the above-mentioned embodiments, but various modifications and changes can be made. For example, the above-mentioned embodiments merely show one example of the present invention,
Needless to say, the present invention can be achieved with other configurations as long as a plane flow is generated at least on the sealing surface between the angle valve and the valve plate. Further, although the valve configuration in the above-mentioned embodiment is a horizontal type, it goes without saying that a vertical type can be adopted.

[0015]

As is apparent from the above description, according to the present invention, the valve packing is provided with the purge means for flowing the plane flow parallel to the sealing surface between the valve packing and the valve plate. When a purging gas or liquid is ejected from the purging means with the plate slightly retracted from the closed state, the gas or liquid passes through the sealing surface between the valve packing and the valve plate, and the valve packing and the first valve chamber. It is possible to remove solid substances such as powder that have reached the boundary portions with and adhered to these portions.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a valve packing in a valve having a gas or liquid purging mechanism of the present invention.

FIG. 2 is a diagram showing another example of the valve packing in the valve having the gas or liquid purging mechanism of the present invention.

FIG. 3 is a view showing a state in which the valve packing shown in FIG. 2 is attached.

FIG. 4 is a diagram showing an example of an attachment sheet of a valve packing in a valve having a gas or liquid purging mechanism of the present invention.

FIG. 5 is a diagram showing an example of a valve having a gas or liquid purging mechanism of the present invention.

FIG. 6 is a diagram showing another example of a valve having a gas or liquid purging mechanism of the present invention.

FIG. 7 is a diagram showing an example of an angle valve for a multifunctional filter, which is a target of the present invention.

[Explanation of symbols]

 1 Valve packing 2 Opening 3 Purge device

Claims (3)

[Claims] 1. A valve used for closing a valve plate by bringing the valve plate into contact with the valve packing provided in the opening, the valve packing being parallel to the sealing surface between the valve packing and the valve plate. A valve having a gas or liquid purging mechanism, characterized in that it is provided with a purging means for flowing a planar flow. 2. A valve having a gas or liquid purging mechanism according to claim 1, wherein the valve case for fixing the valve packing is provided with Teflon lining or glass lining. 3. A valve having a gas or liquid purging mechanism according to claim 1, wherein the barge means is capable of flowing a plane flow and a spiral flow.