JPS6128945Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an opening/closing display device that is attached to a valve, etc. for an oil embankment drain pit in a tank yard in a petroleum product storage facility, and displays the opening/closing of the valve, etc. and the degree of opening/closing of the valve, etc.

The above-mentioned oil embankment drainage pit valves are required by relevant laws and regulations to be equipped with a device that allows for visual confirmation of opening and closing from a distance (30 meters).

For this reason, in the past, as shown in FIG. 1, an opening/closing display plate 4 was attached to the upper end of a rotating shaft 3 of a valve (butterfly valve) 2 operated by an opening/closing device 1 in conjunction with the valve 2. It is attached so that it can rotate, and the opening and closing of the valve 2 is confirmed by looking at the direction of the plate 4. However, with this method, the viewing direction is limited to two directions, front and back, and the valve is fully open, fully closed, and intermediately open. The location confirmation is unclear. In addition to the above, a device with a display plate that flips up to indicate whether the valve is open or closed has been developed, but the structure is complicated and has problems in terms of operational reliability, maintenance, and cost.

This idea was made in view of the above, and allows checking the opening and closing of valves, etc. from multiple directions.Furthermore, it is possible to accurately check the fully open, fully closed, and intermediate opening degrees, and the structure is simple. It is an object of the present invention to provide an opening/closing display device that is difficult to break down and is advantageous in terms of maintenance and cost. This invention will be explained in detail below based on the drawings.

2 to 4 show an embodiment of this invention, and 10 is an opening/closing display device A according to this invention.
This is a regular butterfly valve that is used in equipment. This butterfly valve 10 is constructed by rotating a rotating shaft 12 inserted into an outer pipe 11.
An opening/closing operation device 13 for opening and closing is provided.
In this invention, the specific structures of the butterfly valve 10 and the opening/closing device 13 are arbitrary.

The opening/closing display device A according to this invention, which is installed in a butterfly valve 10 and displays the opening/closing of the butterfly valve 10, consists of an outer cylinder 14 and a central member 15 configured as described below, and a cylindrical body inside the outer cylinder 14. Center member 15
is rotatably installed relative to the outer cylinder 14.

The central member 15 is attached to the rotating shaft 12, and is provided with an opening/closing display section 20 and an opening/closing degree display section 21. Further, the outer tube 14 is fixed to the outer tube 11 side, and the outer tube 14 is fixed to the outer tube 11 side.
The relative rotation of the center member 15 exposes the opening/closing degree display section 21 of the central member 15 to display the opening/closing degree display window 16 for displaying the degree of opening/closing of the butterfly valve 10, and the butterfly valve 10 is brought into the closed state. A first display mark 17 that independently indicates that there is an outer cylinder 14
A second display mark 18 that exposes the opening/closing display section 20 by rotating relative to the center member 15 and works together with the first display mark 17 to indicate an open state opposite to the single first display mark 17. An opening/closing display window 19 is provided to display the opening/closing display window 19.

By the way, in the illustrated example, the first display mark 17 uses the first letter "C" of the English word CLOSE, which means "closed," and the second display mark 18 uses the first letter "C" of the English word OPEN, which means "open.""O" is also used. This is extremely preferable in that it is easy to represent the second display mark 18 by the opening/closing display section 20 exposed in the opening/closing display window 19 and the first display mark 17, and it is simple and clear. However, other marks can also be used.

In the above, the colors of the first display mark 17 and the opening/closing display section 20 are usually the same. The opening/closing display window 16, the first display mark 17, and the opening/closing display window 19 are provided in four pairs at equal intervals on the outer circumferential surface of the outer cylinder 14, and the opening/closing display plate 20 and the opening/closing display section 21 are provided on the outer circumferential surface of the outer cylinder 14. Corresponding to the display windows 16 and 19, four sets are also provided at equal intervals. Therefore, in this embodiment, the opening and closing of the butterfly valve 10 can be checked from four directions intersecting at right angles, but it is possible to change the confirmation direction by increasing or decreasing the number of display windows, etc., or by changing the position. It is possible to change the number. A cover plate 22 is integrally provided at the upper open end of the outer cylinder 14, and this structure prevents rainwater from penetrating between the outer cylinder 14 and the central member 15 as much as possible.

Next, the operation of the opening/closing display device of this invention constructed as described above will be explained.

FIG. 2 and FIG. 4A show a state in which the butterfly valve 10 closes the pipeline, and in this state, the opening/closing display section 20 and the opening/closing degree display section 21 provided on the central member 15 are The display windows 19 and 16 provided in the outer cylinder 14 are covered by the outer cylinder 14 located next to the display windows 19 and 16. Therefore, it is possible to visually confirm that the butterfly valve 10 is in the closed state by visually observing the first display mark 17 displayed on the outer peripheral surface of the outer cylinder 14.

When the opening/closing operation device 13 is operated from the above state and the butterfly valve 10 is installed via the rotation shaft 12,
The center member 15 rotates with respect to the outer cylinder 14 together with the rotation shaft 12, and moves the display sections 20 and 21 on the near side from left to right in FIGS. 2 and 4, and the display windows 19 and 16, respectively. As a result, the second display mark 18 is displayed on one side to indicate that the butterfly valve 10 is in the open state, as shown in FIG. The degree of opening and closing of the butterfly valve 10 is displayed. FIG. 4C shows the fully open state of the butterfly valve 10. In this case, the opening/closing degree display section 21 is exposed over the entire length of the opening/closing degree display window 16 to indicate the fully open state.

As understood from the above description, this opening/closing display device can be used not only for the butterfly valve 10 but also as an opening/closing or position display device for dampers and other devices. Outer cylinder 14 relative to central member 15
It is also possible to configure it to rotate.

As mentioned above, the opening/closing display device of this invention has only the outer cylinder 14 and the central member 15 as its constituent parts, and the structure is such that the opening/closing display is displayed by simply rotating them relative to each other. It is extremely simple to operate, has no room for failure, has high operational reliability, and is easy to maintain and inspect. In addition, the second display mark 18
, the opening/closing display section 20 exposed to the opening/closing display window 19
Since this is an extremely clever structure that is displayed by the first display mark 17, it is possible to accurately confirm whether the display is fully open or completely closed at the same position without tilting the display regardless of the opening degree. At the same time, the opening/closing degree display section 2 for the opening/closing degree display window 16
The degree of opening and closing can also be accurately determined from the exposed length of item 1. In addition, the display windows 16, 19 and the display section 2
It also has the advantage of being able to confirm opening and closing from multiple directions by increasing the number of sets such as 0, 21, etc., and its practical value is great.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional opening/closing display device, Fig. 2 is a front view showing an embodiment of the opening/closing display device according to this invention, Fig. 3 is an exploded external view, and Fig. 4 (a) to (b) are display windows. FIG. 4 is a development view showing various aspects of the relationship between the display unit and the display unit. 14... Outer cylinder, 15... Central member, 16... Opening/closing degree display window, 17... First display mark, 18...
Second display mark, 19... Opening/closing display window, 20...
...Opening/closing display section, 21... Opening/closing degree display section.

Claims (1)

[Scope of utility model registration request] It consists of an outer cylinder 14 and a center member 15 that is relatively rotatably installed in the outer cylinder 14, and the center member 15 is provided with an opening/closing display section 20 and an opening/closing degree display section 21. Further, on the outer cylinder 14, by rotating the center member 15 relative to the outer cylinder 14, an opening/closing degree display section 21 of the central member 15 is exposed to display the opening/closing degree of the butterfly valve 10, etc. An opening/closing degree display window 16, a first display mark 17 that independently indicates a closed or open state, and a first display mark that exposes the opening/closing display section 20 by rotating the outer cylinder 14 relative to the center member 15. 17 and an opening/closing display window 19 that displays a second display mark 18 indicating an open or closed state opposite to the single first display mark 17. Display device.