JPH0115975Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a valve device such as a ball valve that is equipped with an open/close indicator, and in particular, a valve device with an open/close indicator that indicates whether the valve is open or closed in relation to the direction of fluid flow within the valve. Related to valves.

In piping that transfers fluid, valves are usually used to control the flow. Although it is important to be able to easily confirm whether the valve is open or closed from various viewpoints such as risk prevention, in reality some valves are difficult to confirm whether they are open or closed, and there is a high possibility of erroneous operation. Therefore, in order to prevent such erroneous operations, the handle is often removed from the valve stem, but in such cases it becomes even more difficult to confirm whether the valve is open or closed. By the way, various proposals have been made regarding mechanisms for displaying the opening and closing of valves.
They are difficult to confirm whether they are opened or closed, are expensive to produce, have a complicated structure, and are cumbersome to install.
It had drawbacks such as: The object of the present invention is therefore to provide a valve with an open/close indicator that does not have such drawbacks and allows one to very easily confirm whether the valve is open or closed, and in particular can clearly indicate whether the valve is open or closed even when the handle is removed.

That is, the present invention includes a gland flange that pivotally supports the valve stem, and a display board that is attached to the valve stem and rotates on the gland flange as the valve stem rotates. The content is a valve with an open/close indicator, which is characterized by a display consisting of a line diagram or a pattern that indicates the opening/closing of the valve when combined, and furthermore, the display on the gland flange and display board is The valve is characterized in that it displays a figure parallel to the direction of flow passing through the valve when the valve is open, and displays a figure perpendicular to the direction of flow passing through the valve when the valve is closed.

According to the present invention, a valve with an open/close indicator includes a ground flange that pivotally supports a valve stem that opens and closes the valve by rotation, and an indicator board that is attached to the valve stem. The display board is mounted on the valve stem so as to rotate as the valve stem rotates, and is positioned on the gland flange when mounted. The display board can be attached to the valve stem by various means such as gluing or riveting, but if the valve stem is rectangular, for example, a corresponding hole may be bored in the display board. It is easily installed by fitting it onto the valve stem. There are no particular limitations on the shape, size, etc. of the display board and ground flange, as long as they are suitable for achieving the desired purpose of the present invention.

According to the present invention, each of the ground flange and the display board is provided with a display consisting of a diagram or a pattern. These indicators are arranged to indicate the opening or closing of the valve when combined with each other. In other words, since the display board rotates on the gland flange as the valve stem rotates to open and close the valve, it must be positioned facing a predetermined direction on the gland flange when the valve is opened or closed. become. The indications on the display board are then combined with the indications on the gland flange to provide these indications to indicate whether the valve is open or closed.
A good example of this display is that when the valve is open, the shapes are combined to form a figure parallel to (along the flow direction) the fluid flowing through the valve, and when the valve is closed, the shapes are perpendicular to the flow direction of the fluid passing through the valve. There are displays that combine to form shapes (that interrupt the flow). In other words, by displaying, for example, one, two, or more wide lines along the flow direction indicated by the piping when the valve is open, it can be determined at a glance that fluid is being transferred within the valve. In addition, when the valve is closed, there is an indication that the flow is cut off in the middle of the pipe, so even if the temporary handle is removed, it is easy to visually confirm whether the valve is open or closed. Therefore, according to the present invention, the open/closed state of the valve can be confirmed at a glance, and the above-mentioned figure will not be completed if the valve is not completely opened or closed, so such a situation can be avoided.
It also has the advantage of helping to prevent mistakes and troubles. Furthermore, the structure is simple, the installation is easy, and the cost is low. The figures to be displayed are selected depending on the diagrams and patterns of the ground flange and display board.
For example, in addition to a simple line, there may be a picture of a human shape, a mark, etc.

Furthermore, according to the present invention, the display board can also be used as a valve stopper. In other words, since the display board is attached to the valve stem, if the display board is fixed to the ground flange with pins, etc. when the valve is open or closed, the valve will not open or close accidentally due to vibration or other factors. can be avoided. Note that when this purpose is also used, it is desirable to make the engagement between the valve stem and the display board as firm as possible. Of course, when the valve is fixed as a stopper, the open/closed state of the valve can be clearly indicated.

The present invention will be explained in more detail with reference to Examples below.

FIG. 1 shows a valve according to an embodiment of the present invention. The valve 1 includes a ball valve 2, which has a bore 3 through which fluid passes.
is formed. The ball valve 2 is located within a valve body 4 having a shape that matches its outer shape, and is retained within the valve 1 by assembling the body cap 5 to the body 4. A rectangular valve stem fitting hole 6 is bored at the top of the ball valve 2, and a valve stem 7 with a rectangular cross section that fits into the hole passes upward through a valve stem passage 8 provided in the valve body 4. Stretch. A stem bearing 9 is attached near the outer end of the valve stem passage 8 of the valve body 4, and a gland flange 10 is attached thereon. The valve stem 7 passes through the stem bearing 9 and further projects above the ground flange 10, into which a substantially rectangular display board 11 is fitted and mounted. Figure 1 shows the valve in an open state, but to close it, attach a handle (not shown) to the protrusion of the valve stem 7 and turn the valve stem 1/4 turn.
The ball valve 2 fitted with the valve stem 7 rotates laterally, the bore 3 no longer faces the fluid flow path 12, and the flow stops. The valve is opened and closed by forming the valve stem 7 in this manner and rotating it back to its original position. Along with this, the display board 11 also rotates on the ground flange 10.

In FIGS. 2 to 5, the display board 11 has thick line figures 1 as seen in FIGS. 2, 3, and 4.
3 are drawn symmetrically with respect to the valve stem 7, and thick line figures 14 and 15 as shown in FIG. 5 are drawn on the ground flange 10. In FIGS. 2 and 3, arrows indicate the flow direction of the fluid in the valve, that is, the direction in which the piping continues through the valve. When the valve is open, the display 13 on the display board 11 and the display 14 on the gland flange 10 are shown. are combined to display two thick lines along the flow direction (Figure 2). Therefore, in this case, the indication is made in the direction in which the piping is continuous, and it is very easy to confirm that the valve is open even when the handle is removed. Further, when the valve is closed, the display 13 on the display board 11 and the display 15 on the ground flange 10 are displayed in combination to block the flow as shown in FIG. 3, so that it is easy to confirm that the valve is closed in this case as well. Therefore, there is no need to worry about erroneous operation, and since the structure is simple, installation is easy. Furthermore, since the figure is not displayed as a straight line as shown in FIG. 4 when the opening/closing state is incomplete, dangers due to such imperfection can be prevented.

FIG. 6 shows an example in which the display board is configured as a stopper 16. In this case, a locking hole 17 is formed at each position of the gland flange 10 and a locking hole 18 is formed at one end of the stopper 16 so that the valve can be fixed in an open or closed state,
The stopper 16 is fixed to the ground flange 10 using a locking pin 19 or a cylinder lock. Since the stopper 16 is attached to the valve stem 7 through a rectangular hole, the valve stem 7 does not move, and therefore the ball valve does not operate. Therefore, loosening of the valve due to erroneous operation, vibration, etc. can be avoided, and furthermore, when the valve is fixed, opening and closing of the valve can be clearly indicated.

[Brief explanation of the drawing]

FIG. 1 is a partially cut away perspective view of an embodiment of a valve according to the present invention, and FIGS. 2 to 6 are plan views showing embodiments of a valve opening/closing display according to the present invention. 1...Valve, 2...Ball valve, 3...Bore,
4...Valve body, 5...Body cap, 6...
Valve stem fitting hole, 7... Valve stem, 8...
... Valve stem passage, 9 ... Stem bearing,
10...Gland flange, 11...Display board, 12...Flow path, 13...Display, 14...Display, 15...Display, 16...Stopper, 17...
...Latching hole, 18...Latching hole, 19...Latching pin.

Claims (1)

[Claims for Utility Model Registration] 1. A system comprising a gland flange that pivotally supports the valve stem, and a display board that is attached to the valve stem and located on the gland flange so as to rotate with the rotation of the valve stem. Each of the display boards displays the opening and closing of the valve in such a way that when the valve is opened, a figure is parallel to the direction of flow through the valve, and when the valve is closed, a figure is perpendicular to the direction of flow through the valve. A valve with an opening/closing indicator, characterized in that it has a display consisting of a line diagram or a pattern. 2. The valve with an open/close display according to claim 1 of the utility model registration claim, wherein the display board also serves as a stopper for fixing the valve in an open or closed state.