JPH0537110Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an indicator mounted on a cylinder that uses liquid or gas to open and close a ball valve or other valve.

PRIOR ART Conventionally, there is no ball valve of this type that is equipped with an indicator on its opening/closing cylinder or electric motor.

Problems to be Solved by the Invention If the opening/closing cylinder is not equipped with an indicator, the direction of the valve and cylinder may be set parallel or perpendicular to the piping line by the valve, depending on the space at the installation location. ing.

As shown in FIG. 5A, the axis 11 of the cylinder 10 is parallel to the piping line 9, and the valve 12 is open. If this cylinder 10 is removed due to space limitations and installed as shown in FIG. 5B, the axis 1 of the cylinder 10
1 is perpendicular to the pipe line 9, but the valve 12 remains in the open position.
However, since the direction of the axis 11 of the cylinder 10 has been changed, there is a high risk of misunderstanding that the valve is actually closed.

The purpose of this invention is to solve the above problems,
By providing an indicator, the present invention aims to provide an indicator for a valve opening/closing cylinder that can display the axial direction and position of the valve without error.

Means for Solving the Problem The valve comprises a ball valve or other valve, and an oblong cylinder mounted on the valve and driven using hydraulic pressure or pneumatic pressure to rotate the shaft of the valve at a fixed angle. A valve opening/closing cylinder is provided in which the horizontally elongated cylinder is arranged parallel to or at right angles to the piping line of the valve by engagement of the axis of the cylinder with the axis of the cylinder, and the position is made of synthetic resin or other elastic material. A direction indicating protrusion is provided on the upper surface of the indicator, and a cross-sectional cross-sectional groove on the bottom surface of the indicator is used as an indicator of a valve opening/closing cylinder press-fitted into the upper end of the shaft of the cylinder.

Function: A position indicator made of synthetic resin or other elastic material is press-fitted to the end of the cylinder shaft using elasticity, so it does not accidentally fall off the end of the cylinder shaft. Since it indicates the axial direction and the direction of the opening/closing position,
The risk of misidentification has been eliminated by replacing the cylinder or changing the installation direction.

Furthermore, since the indicator is integrally molded from synthetic resin, it is easy to make, and by providing a cross-shaped groove on the bottom, it can be reliably aligned with the axial direction and position of the valve, regardless of the axial direction of the cylinder. It can be installed in any location, and can be easily identified by the direction indicating protrusion on the top surface.

Embodiment The drawings show an embodiment of the present invention. In FIG. 1, 1 is an indicator, 2 is a cylinder, and 3 is an indicator.
4 indicates the axis of the cylinder, 4 indicates the valve, 5 indicates the axis of the valve, and 6 indicates the frame for mounting the cylinder.

The cylinder 2 is driven using hydraulic pressure, air pressure, etc., and rotates by a certain angle in accordance with the rotation of the shaft 3 of the cylinder 2. According to this rotation, the shaft 5 of the valve 4
The valve also rotates to open and close the valve.

In Figures 2 to 4, 1 is an indicator;
Reference numeral 7 indicates a cylinder shaft fitting portion formed into a cross-shaped groove, and reference numeral 8 indicates a direction indicating protrusion provided on the upper surface. Since the cylinder shaft fitting portion 7 is formed into a cross-shaped groove, it can be fitted into the cylinder 2 no matter which direction the shaft 3 of the cylinder 2 is facing. Also, it is made of an elastic material such as synthetic resin so that it can be press-fitted into the cylinder shaft.

In addition, as shown by the dashed line in FIG. 4, the indicator 1 may have a double-walled hollow shape, and the double walls may be connected by ribs to strengthen the elastic force of the cylinder shaft fitting portion 7. .

Effects of the invention Since the present invention has the above-mentioned configuration, regardless of the installation direction of the cylinder, the indicator can always be fitted to the axial end of the cylinder according to the axial direction and open/close position of the valve. This has made it possible to reliably recognize the valve status even from a distance, and to prevent the danger associated with misidentification.

By using the cross-shaped groove on the bottom of the indicator, it is convenient to be able to easily indicate the direction of the valve axis, regardless of the direction of the cylinder or the direction of the piping line.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main part showing the indicator of the present invention installed at the shaft end of the cylinder, Figure 2 is a front view of the indicator, Figure 3 is a plan view of the indicator, Figure 4 is a bottom view of the indicator, and Figure 5 is a bottom view of the indicator. Figures A and B are relationship diagrams between cylinders and piping lines. 1...Indicator, 2...Cylinder, 3...
... Cylinder axis, 4... Valve, 5... Valve axis, 7... Shaft fitting part, 8... Direction indicating protrusion.

Claims (1)

[Scope of utility model registration request] It comprises a ball valve or other valve, and an oblong cylinder mounted on the valve and driven using hydraulic pressure or pneumatic pressure to rotate the shaft of the valve at a fixed angle, and the shaft of the valve and the shaft of the cylinder are aligned. A valve opening/closing cylinder is provided in which the horizontally elongated cylinder is arranged parallel or at right angles to the piping line of the valve, and a direction indicating bump is provided on the upper surface of a position indicator made of synthetic resin or other elastic material. 1. An indicator for a cylinder for opening and closing a valve, characterized in that the indicator is press-fitted into the upper end of the shaft of the cylinder using a cross-sectional cross-sectional groove on the bottom surface of the indicator.