JPH05302837A - Valve-opening indicating device - Google Patents

Abstract

PURPOSE:To decrease the kinds of gears for replacement and to omit one-piece manufacturing of the gear for replacement by changing the inclination of a slant edge by utilizing the sticking state of a surface constituting body, which forms the different surface that can be identified from the surface of an indicating drum. CONSTITUTION:A surface-shaped tape 10, whose one edge is a slant edge 9, is wound around an indicating drum 7. The sheet tape 10 is the surface constituting body for forming the other surface, which can be identified from the surface of the indicating drum 7. It is preferable that the tape is the adhesive tape, which can be peeled relatively easily and has the different color. A slant line in the circumferential direction along the angle range corresponding to the opening degree of a valve is drawn with the slant edge 9 of the sheet tape 10. A slit 11, which is in parallel with the indicating drum 11, is cut at the position close to the indicating drum 7. An opening indicating plate 13, on which opening graduations 12 for the valve is marked, is provided along the slit 11. The opening degree of the valve is indicated with the graduation 12 at the intersection of the slant edge 9 displayed in the slit 11 and the upper edge of the slit 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening degree indicating device for a valve drive device which is widely used in various plants.

[0002]

2. Description of the Related Art As a valve opening indicating device, it is general that the operation amount of a valve system is decelerated by a gear or a chain and displayed by a pointer.

[0003]

The type of valve is
There are various sizes. Therefore, the opening degree indicating device of the valve driving device also needs to meet the valve specifications. For example, in an electric valve drive device, a valve opening of 0 to 100% is caused by 100 rotations of a motor.
In some cases, the valve opening degree reaches 100% in 1000 rotations of the motor.

In the conventional opening indicating device that decelerates and displays the operation amount of the valve stem by a gear or a chain, it is necessary to give a reduction ratio corresponding to each specification of the valve, each time the specification of the valve is different. Otherwise, the actual opening of the valve and the value indicated by the opening indicating device will not match.
Since the gear of the opening degree indicator is a multi-stage reduction mechanism, it is necessary to combine several types of exchange gears to achieve the required reduction ratio, but even so, the valve specifications are too diverse, so inventory The types of replacement gears to be done will be enormous. In addition, with the gears in stock, it is not possible to realize the required reduction ratio, and it is often the case that one gear is manufactured. In that case, there are often problems with the delivery date.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problems, and reduces the number of types of replacement gears and eliminates the need to manufacture one replacement gear.

[0006]

According to the present invention, the outer peripheral surface of the display drum is provided with a surface structure which is easily attached and detached so as to draw a diagonal line in the circumferential direction over an angular range corresponding to the opening degree of the valve. The above problem is solved by displaying the valve opening at the intersection of the diagonal line and the slit that is parallel to the display drum on the opening display plate arranged close to the display drum.

[0007]

Various valve specifications can be dealt with by changing the inclination of the inclined edge depending on the attachment degree of the surface structure forming another surface that can be distinguished from the surface of the display drum.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The operating amount of the valve stem depends on the speed reduction mechanism input shaft
(1) It is transmitted to the upper pinion (2). The rotation amount of the pinion (2) is reduced by the multi-stage exchange gear group (3) and is transmitted to the output shaft (4) of the pinion (2) at a rotation angle of usually 270 degrees or less. The rotation of the output shaft (4) is transmitted to the rotating shaft (8) of the display drum (7) via the coupling (5) and the flexible shaft (6).

The display drum (7) is rotatably supported by bearings, and there is no restriction on the amount of rotation.
Rotate the same amount as (4). The maximum amount of the rotation angle is usually 270 degrees, and if the angle of 0 degrees corresponds to the valve being fully closed, the angle of 270 degrees corresponds to the fully opening. Conventionally, since the pointer is directly attached to the output shaft (4) of the speed reduction mechanism, the pointer also has to be accurately rotated by 270 degrees before the actual valve opening changes from fully closed to fully opened. This is because if the reduction gear ratio of the replacement gear of the reduction gear mechanism section is not appropriate, there will be a difference between the actual opening degree and the instruction value.

On the outer peripheral surface of the display drum (7), a sheet tape (10) having one side edge as an inclined edge (9) is wound. The surface tape (10) is a surface structure for forming another surface that can be distinguished from the surface of the display drum (7), and is composed of an adhesive tape that can be peeled off relatively easily. It is desirable to use a color different from the outer peripheral surface of (7).

The inclined edge (9) of the sheet tape (10) defines a diagonal line in the circumferential direction over an angular range (usually 270 °) corresponding to the opening of the valve.

A slit (11), which is close to and parallel to the display drum (7), is cut, and a scale (12) for opening the valve is provided along the upper edge of the slit (11). Opening degree indicating plates (13) (10) are provided.

Due to the scale (12) at the intersection of the inclined edge (9) appearing in the slit (11) and the upper edge of the slit (11),
The valve opening is displayed.

It is a feature of the present invention that the inclined edge (9) of the circumferential surface on the outer peripheral surface of the display drum (7) is formed of a material which can be easily attached and detached. Not limited to this, an adhesive linear tape, a magnetic adsorption tape, a surface fastener type tape, and a heat-shrinkable tube or pipe can also be used.

[0015]

【The invention's effect】

(a) For a wide range of valve specifications, which can be said to be infinite, for a large range of valve specifications, simply change or replace the surface structure without changing the replacement gears, and change the angle of the inclined edge. Can be adapted.
Therefore, only a fixed number of standard exchange gears can be used, which is advantageous in inventory management.

(B) Even if the valve opening / closing end position is delayed due to wear or the like, it can be dealt with by changing the angle of the inclined edge by replacing or replacing the surface structure. In this case, it is possible to cope more appropriately by making the inclination of the end portion of the inclined edge different.

[Brief description of drawings]

FIG. 1 is a conceptual diagram schematically showing an embodiment of the present invention. (1) Input shaft (2) Pinion (3) Exchange gear (4) Output shaft (5) Coupling (6) Flexible shaft (7) Display drum (8) Rotating shaft (9) Inclined edge (10) Surface tape ( Surface structure) (11) Slit (12) Scale (13) Opening indicator

Claims (7)

[Claims] 1. A peripheral surface of the display drum is provided with a surface structure that is easily removable, and a diagonal line is drawn in the circumferential direction over an angular range corresponding to the opening of the valve. A valve opening degree display device characterized in that the opening degree of a valve is displayed at an intersection of a slit formed in parallel with a display drum on an arranged opening degree display plate. 2. A valve opening is provided with an inclined one side edge of the surface tape by winding a side tape around the outer peripheral surface of the display drum, the side tape being easily removable in the axial direction of the display drum. The valve opening degree display device according to claim 1, wherein a diagonal line in a circumferential direction is drawn over an angle range corresponding to degrees. 3. A linear tape, which is easily removable, is wound around the outer peripheral surface of the display drum in the axial direction of the display drum, and the tape is applied in a circumferential direction over an angular range corresponding to the opening of the valve. The valve opening indicating device according to claim 1, wherein a hatched line is drawn. 4. The valve opening indicating device according to claim 1, wherein the surface structure has a color different from that of the outer peripheral surface of the display drum. 5. The surface structure is an adhesive tape.
5. The valve opening indicating device according to any one of 1 to 4. 6. The outer peripheral surface of the display drum and the surface constituting member are mutually engaging type surface fasteners.
The valve opening degree display device according to any one of 1. 7. The valve opening indicating device according to claim 1, wherein the outer peripheral surface of the display drum is made of a magnetic sensitive material, and the surface structure is made of a magnetic material.