JPH0331902Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device that automatically displays the opening/closing status of valves used in various industrial equipment.

[Conventional technology]

The opening and closing status of valves used in liquid and gas piping in various industrial equipment has a significant impact on the operation and security management of the equipment, so it is necessary to constantly monitor the opening and closing status of valves. In this case, after knowing whether the valve in question is normally open or normally closed,
It is necessary to visually check the current open/closed state and determine whether it is normal or abnormal (such as forgetting to close or open) compared to the normal state. In order to make such judgments without error, for example, each valve is equipped with a display board that displays the words "open" or "closed" so that it can be inserted and removed, and the color of the display board is set to red or blue, for example. There is a predetermined method in which red is a normally open type and blue is a normally closed type.

According to this method, the normal status can be determined by the color of the display board, and the current status can be determined by the characters "open" or "closed," and both displays can be combined to determine whether it is normal or abnormal. It is something to judge.

[Problem that the invention attempts to solve]

The above-mentioned display board system cannot achieve its intended purpose unless the operator who opens and closes the valve correctly replaces the display board according to the opening and closing status of the valve. However, since a worker cannot be expected to reliably replace the data each time he or she performs a task, it is not always possible to use an accurate display method.

Therefore, the object of this invention is to enable an opening/closing display to be automatically performed in conjunction with the opening/closing operation of the valve without any manual operation.

[Means for solving problems]

In order to solve the above problems, this invention forms two different colored bands on the outer periphery of the valve body, adjacent to each other in the direction of movement of the valve stem, with a width equal to the stroke of the valve stem. The cylindrical part of the fitted cap is placed over the two colored bands, and a window hole with a width equal to the width of one colored band is formed in the cylindrical part, and the outer peripheral surface of the cylindrical part is colored with one of the colored bands. It is colored in the same color as the band, and the cap is pressed against the handle by a coil spring inserted inside the cap.

[Effect]

When the handle is not operated, one of the colored bands is exposed through the window hole of the cap. When the handle is operated to move the valve stem forward or backward, the cap moves, and the colored band visible through the window changes to a different color. If the color of the cylindrical body of the cap matches the color of the colored band visible through the window hole, it can be determined to be normal, and if they do not match, it can be determined to be abnormal.

〔Example〕

As shown in FIG. 1, a valve cover 2 is attached to one end of the valve body 1.
are screwed together, and a valve stem 3 protrudes from the center of the tip of the valve cover 2. The valve cover 2 is formed by integrally forming a square shaft portion 5 and a seal retaining portion 6, and is screwed to a threaded portion 7 of the valve body 1.

Attach colored tape, etc. to the outer periphery of the valve lid 2.
Adjacent colored bands 8a, 8b of the book are formed. In the figure, the outer colored band 8a represented by a diamond pattern is, for example, red, and the inner colored band 8b represented by a checkered pattern.
is, for example, blue. The width of these colored bands 8a or 8b is determined to be equal to the stroke of the valve stem 3.

Further, a cap 9 capable of covering the entire valve lid 2 is provided. The cap 9 has a cylindrical portion 10 that covers the outer periphery of the colored bands 8a, 8b on the outer periphery of the valve lid 2. One end of the cylindrical portion 10 is open, and a small diameter hole 12 is formed in the center of a wall surface 11 (see FIG. 2) formed on the rear end surface. Further, a U-shaped extension 3 is protruded around the hole 12, and a hole 14 having a larger diameter than the valve stem 3 is formed in the end face of the extension 13.

The extension part 13 may be formed into a cylindrical shape as shown in FIG. 3, and the hole 14 may be formed in the center of the end surface.

In any of the above cases, the cylindrical portion 10 has a window hole 15 having a width equal to the width of the colored bands 8a, 8b.
is formed. The position of this window hole 15 is as follows when the cap 9 is in the most retracted state (see Fig. 4).
The window hole 15 is set so that the outer colored band 8a is exposed. Two window holes 15 are formed with a length nearly equal to half the circumference of the cylindrical portion 10. In addition, the cylindrical part 1
The outer peripheral surface of 0 is colored in one of the colors of the colored bands 8a and 8b, for example, red (represented by a diamond pattern in the figure). The extension portion 13 is also colored in the same color.

On the other hand, the valve body presser part 6 and the valve stem 3
A coil spring 16 is inserted around the . One end of the coil spring 16 is in contact with the step of the square shaft portion 5, and the other end is in contact with the inner side of the end surface of the extension portion 13. Handle 1
7 is screwed into the tip of the valve stem 3, the coil spring 16 is compressed, and a biasing force is exerted to press the cap 9 against the handle 17.

Note that the handle 17 is fixed by a washer 18 and a nut 19.

The valve opening/closing display device according to the embodiment of this invention is constructed as described above, and its operation will be explained next.

Now, if the cylindrical portion 10 is colored red to indicate that it is a normally open valve, as shown in FIG.
A red colored band 8a appears from 5 and matches the coloring of the cylindrical portion 10. Therefore, in this case, it can be determined that the valve whose normal state is normally open is in the open state, ie, normal.

Further, as shown in FIG. 5, when the valve stem 3 is moved forward by operating the handle 17, a blue colored band 8b appears from the window hole 15 at the end of the stroke. In this case, since the valve which is normally open is in the closed state, it can be determined that there is an abnormality.

In addition, in the case of a valve whose normal state is normally closed, the outer circumferential surface of the cylindrical portion 10 is colored blue as shown in FIG.

[Effect of idea]

Since this invention is as described above, the display can be automatically linked to the opening and closing of the valve without any manual operation, and has the effect of significantly improving the accuracy of the display.

[Brief explanation of the drawing]

FIG. 1 is an exploded front view of the embodiment, FIG. 2 is a perspective view of the cap, FIG. 3 is a perspective view of another example of the cap, and FIGS. 4 to 6 are front views of the cap in use. 1... Valve body, 2... Valve cover, 3... Valve stem, 5...
...Square shaft part, 6...Puttle presser part, 7...Threaded part, 8a, 8b...Colored band, 9...Cap, 1
0...Cylinder part, 15...Window hole, 16...Coil spring, 17...Handle.

Claims (1)

[Scope of utility model registration request] Two colored bands of different colors with a width equal to the stroke of the valve stem are formed adjacent to each other in the direction of movement of the valve stem on the outer periphery of the valve body, and the cylindrical portion of the cap loosely fitted onto the valve stem is
At the same time as covering the area around the coloring band of the book, 1
A window hole with a width equal to the width of one colored band is formed, the outer peripheral surface of the cylindrical part is colored in the same color as one of the colored bands, and the cap is attached to the tip of the valve stem using a coil spring inserted inside the cap. A valve opening/closing indicator that is pressed on the handle.