JP2000018425A - Valve open/close indication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To indicate a complete open or complete close state of a valve. SOLUTION: A valve is opened and closed by turning a valve shaft 3 by plural times. Such a valve has followings. A valve shaft position determination means 7 determines whether the valve is at a full open position or a full close position from rotational rate of the valve shaft 3. A valve handle position angle determination means 10 determines whether or not the angular position of a handle 2 of the valve is at the full open/close positions. An indication means indicates whether the valve is open or close when the determination result of the valve shaft position determination means 7 is agreed with that of the valve handle position angle determination means 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening / closing display device for indicating the opening / closing state of a valve, and is particularly suitable as a valve opening / closing display device for use in containing dangerous goods or the like.

[0002]

2. Description of the Related Art Conventionally, the movement of a valve stem is taken out by a moving body moving in the axial direction of the valve shaft, and an opening indicator is connected to the moving body, and the opening of the valve is determined by the position of the opening indicator. Is displayed in Japanese Patent Application Laid-Open No. 1-283490.

[0003]

When such a movement of the valve shaft is taken out by the moving body, the position of the moving body is very small in a state where the valve is completely closed and in a state immediately before the valve is still completely closed. It has been difficult to make the distinction easily, even if observed visually from the outside.

[0004] It is an object of the present invention to display the open / closed state so that it can be recognized that the valve is completely opened or closed even in such a case.

[0005]

SUMMARY OF THE INVENTION A valve opening / closing display device according to the present invention is a valve having a structure in which the valve is opened and closed by rotating the valve shaft a plurality of times. Valve shaft position determining means for determining whether the valve is in a fully closed position; valve handle position angle determining means for determining whether a position angle of a handle of a valve is in a fully opened or fully closed position; A display unit for displaying that the valve is open or closed when the determination result of the position determination unit matches the determination result of the valve handle position angle determination unit.

Further, the valve shaft position judging means may be constituted so that the position of the sliding means which makes a linear motion with the rotation of the valve shaft is detected by the position detecting means. Further, the valve handle position angle determination means may be configured to detect the position angle of a handle position determination member attached to a handle or a shaft of the valve by a position detection means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS By providing a valve shaft position determining means for determining whether a valve is in a fully open position or a fully closed position based on the amount of rotation of a valve shaft, the valve is in a substantially fully open position or a substantially fully closed position. Can be determined. That is,
When the amount of rotation of the valve stem of the valve has some fluctuation, or when the position of the rotation sensor that captures the rotation as it is or the position of the slide that linearly moves with the rotation is detected by the position detector. In addition, it is considered that an error occurs in each of the conversion systems and the detection systems. It is a means that can determine whether the valve is near the fully open position or near the fully closed position even if there is such a variation or error.

Next, the valve handle position determining means for determining whether the position of the handle of the valve is at the fully opened or fully closed position angle is determined when the handle position angle is fully open, fully closed, or neither. It is determined that it is at the position. This valve handle position angle determination means is a determination means for detecting and determining which position of a 360 ° rotation angle of a rotating part such as a valve handle when the valve is fully opened or fully closed. That is, since the rotating part rotates a plurality of times during the opening / closing operation of the valve, each time the valve makes one rotation, the valve handle position / angle determining means issues a signal indicating that the valve is in the open position or the closed position.

After all, when the judgment result of the valve shaft position judging means coincides with the judgment result of the valve handle position angle judging means, if the indication that the valve is open or closed is displayed, the valve is completely opened or closed. Can be displayed. That is,
The valve shaft position determining means determines that the position of the valve shaft is at, for example, a fully closed position from the rotational speed of the valve with an accuracy of less than one rotation, and the valve handle position angle determining means determines that the valve is in one rotation of the valve. That is, it is determined that the position angle is the fully closed position angle. That is, the valve shaft position determining means needs to have an accuracy capable of determining whether the valve is in the fully closed position within an error of less than one rotation of the valve shaft.

The present invention relates to a valve opening / closing display device, which is characterized by not only indicating that the valve is open or closed, but also displaying that it is completely open or closed. Next, a case where a completely closed display has a significant meaning will be described. In this device, even if the valve is actually in the closed state, the indication that the valve is closed is not displayed unless both the valve shaft position determining means and the valve handle position determining means determine that the valve is in the closed position. Is a very safe side when holding in a container by closing the valve. That is, if it is a normal valve, if the valve shaft position determining means determines that the valve is fully closed, if the valve is slightly rotated from that position, the valve is actually closed, and the handle of the valve is completely closed. It is good in that the valve can be closed without rotating it to the position angle that it is in, but it is to be perfect by rotating it to the position angle in which the valve handle is completely closed.

On the other hand, when such a display device is used for the open display, it is safe to indicate that the display is completely open. For example, the air in a pneumatic pipe used for a safety system may be used. Indication such as an introduction valve may be considered. In other words, indicating that the valve is completely open is a safe side as an indication of a valve that must be open.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a valve provided with a valve opening / closing display device according to the present invention. FIG. 2 is a cross-sectional view showing the vicinity of a handle of the valve. In this embodiment, an example will be described in which a valve opening / closing display device for displaying that the valve is closed is provided.

The valve 1 is a general valve, and when the handle 2 is rotated, the shaft 3 enters the case 4 while rotating.
The valve eventually closes. When the handle 2 is rotated in the reverse direction, the shaft 3 comes out of the case 4 while rotating, and the valve is opened. Here, the handle 2 is removed, and the collar 5 is attached to the shaft 3. Specifically, the flange 5 is fixed to the shaft 3 by closing the set bolt 6. The flange 5 fixed to the shaft 3 in this manner moves with the movement of the shaft in the axial direction following the rotation of the shaft. By detecting the moved jaw 5 by the first sensor 7, it is determined whether or not the valve is in a substantially fully closed position. That is, the first sensor 7
Is a valve axle position determining means for determining whether the valve is in a fully closed position based on the amount of rotation of the valve shaft in cooperation with the flange 5, and the flange 5 performs a linear motion with the rotation of the valve shaft. It can be called a means. Although the first sensor uses a limit switch in the present embodiment, a switch using an optical sensor, a magnetic sensor, or the like may be used instead.
That is, there is a method in which a light reflecting member or a magnetic member is attached to the shaft instead of the flange-shaped object, and when the light reflecting member or the magnetic member moves together with the shaft, detection is performed by an optical sensor or a magnetic sensor.

The handle 2 is further provided with a handle angle position detecting plate 8 by means of a handle mounting bolt 9. The handle angle position detection plate 8 is attached to detect the position of the handle between one rotation and 360 degrees. Further, the second sensor 10 is provided so as to be able to detect the handle angle position detecting plate 8 when the valve 1 is in the fully closed position. The case in which the handle is completely closed means that the valve is closed and the handle cannot be rotated any more manually. That is, the first sensor 7 cooperates with the handle angle position detection plate 8 serving as a handle position determination member to determine whether the position of the handle of the valve is at the fully opened or fully closed position angle. It serves as position determination means. Although the reflection type optical sensor is used here as the second sensor, a switch using a limit switch, a magnetic sensor, or the like may be used instead.

When the valve 1 constructed as described above is fully open, the first sensor 7 is off. When the handle is turned in the beginning, the valve 1 is in a substantially closed state. Then, the first sensor is turned on. First sensor is ON
When the handle 2 is further turned after reaching, and stopped at a position where rotation is impossible, the second sensor 10 is turned ON. Here, the first
When both the second sensor and the second sensor are turned on, a signal indicating that the valve 1 is closed is sent to a remote valve status display device, and the display is set to "closed".

The display device is not limited to a remote location and may be in the immediate vicinity of the valve or both. In addition, it may be used not only for display but also as some kind of control signal. Further, in the case of a valve having a structure in which the shaft 3 only rotates and does not move in the axial direction, a nut or the like is passed through the shaft 3 so that the shaft 3 does not rotate integrally with the rotation of the shaft 3 and If the nut is mounted so as to be movable in the axial direction, the nut moves in the axial direction with the rotation of the shaft. Instead of

[0017]

The valve opening / closing display device of the present invention is characterized by not only indicating the indication of opening / closing but also indicating that the valve is completely open or closed. Thus, for example, a completely closed display is particularly significant. In this device, even if the valve is actually in the closed state, the indication that the valve is closed is not displayed unless both the valve shaft position determining means and the valve handle position determining means determine that the valve is in the closed position. Is a very safe side when holding in a container by closing the valve.

[Brief description of the drawings]

FIG. 1 is a perspective view of a valve provided with a valve opening / closing display device according to the present invention.

FIG. 2 is a sectional view showing the vicinity of a handle of the valve of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve 2 Handle 3 axis 5 Flange 7 First sensor 8 Handle angle position detecting plate 10 Second sensor

Claims (3)

[Claims] 1. A valve having a structure in which a valve is opened and closed by rotating a valve shaft a plurality of times, a valve shaft position determining means for determining whether the valve is in a fully open position or a fully closed position based on a rotation amount of the valve shaft. Valve handle position angle determining means for determining whether the position angle of the handle of the valve is at the fully opened or fully closed position; determination results of the valve shaft position determining means; and the valve handle position angle determining means A display means for displaying that the valve is open or closed when the judgment results of the above are coincident. 2. The valve opening / closing display device according to claim 1, wherein said valve shaft position determining means is configured to detect a position of a slide means which performs a linear motion with rotation of the valve shaft by a position detecting means. 3. The valve handle position angle judging means according to claim 1 or 2, wherein the position angle of a handle position judging member attached to a valve handle or a shaft is detected by a position detecting means. Valve open / close display.