JP2000274557A - Opening indicating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening indicating device capable of correctly and visually recognizing either of states by dividing an indicating part of a moving state of a valve stem and an indicating part of a revolving state of a driving side axis in the case when the valve stem reaches a working limit and the driving side axis and the valve stem do not interlock with each other. SOLUTION: An auxiliary revolving indicating part 16 is arranged with a revolving indicating part 14 on a fixed display part 15, valve opening is indicated by integrally holding and revolving the revolving indicating part 14 and the auxiliary revolving indicating part 16 by an interlocking means 17 in an interlocking state of a driving side shaft and a valve stem, and only the revolving indicating part 14 is interlocked with the drive side shaft by stopping the auxiliary revolving indicating part 16 by a constraining means 18 in a state where the drive side shaft and the valve stem are not interlocked with each other by working of a cushioning part, and consequently, the auxiliary revolving indicating part 16 stays in a valve opening displaying range and can correctly indicate valve opening and misconception of valve opening does not occur even in the case of revolving the drive side shaft in a valve stem stopping state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening indicating device for always and appropriately displaying a valve opening in a valve operating device.

[0002]

2. Description of the Related Art In a valve disposed in a pipeline for feeding a fluid, a remote control mechanism using an electric motor is generally used in addition to a manual mechanism as an opening and closing operation mechanism. Conventionally, in a valve operating mechanism using such an electric motor, in order to completely close the valve when the valve is fully closed, the force on the valve seat surface increases at the valve closing position, and the driving torque of the operating unit exceeds a predetermined value. In this case, a torque stop (torque seating) system is employed in which the torque switch is operated to stop the electric motor when the valve is closed, thereby stopping the valve closing operation.

FIGS. 4 to 6 show an example of such a conventional valve operating mechanism. 4 is a sectional view of a conventional valve operating device, FIG. 5 is another sectional view of the conventional valve operating device, and FIG. 6 is a longitudinal sectional view of a conventional opening indicating device.

In each of the drawings, a conventional valve operating device 100 is shown.
Is a device used in combination with a valve (not shown) disposed in a pipeline, and includes a device case 101 disposed adjacent to the valve, and a rotatable interior of the device case 101. And a substantially cylindrical body which is partially inserted in the sleeve 102 so as to be slidable in the axial direction and is disposed so as to be rotatable integrally with the sleeve 102. A stem bush 103 in which an end of a valve shaft (not shown) of the valve serving as an output side shaft is screwed inward; a worm wheel 104 rotatably disposed around the outer periphery of the sleeve 102; Around the outer circumference of the sleeve 102 near the worm wheel 104, the sleeve 102 is disposed so as to be slidable in the axial direction and rotatable integrally with the sleeve 102. Muhoiru 104 and the sleeve 102
And a worm 106a rotatably disposed in the device case 101 and meshing with the worm wheel 104 at an axially intermediate position.
A worm shaft 106 formed with a worm shaft; an electric motor 107 disposed outside the device case 101 for driving the worm shaft 106; and a worm shaft 106 having one end engaged with the worm shaft 106 in the device case 101. A torque switch 110 arranged to detect the axial movement of the sleeve 102, and an opening which is arranged in the apparatus case 101 in association with the sleeve 102 and displays the valve opening based on the amount of rotation of the sleeve 102. The configuration includes an instruction device 120.

The worm shaft 106 is rotatably supported by the device case 101 via a bearing 101a and is movable in a predetermined range in the axial direction. An electric motor 107 is provided at one end of the worm shaft 106a. A gear 106b receiving driving force from the shaft is provided, and a torque detecting unit 106c is formed to protrude in a flange shape from two places on the shaft to engage an end of the torque switch 110 therebetween. Has a configuration in which a torque spring 106d is provided which applies an urging force in the direction opposite to the displacement when the entire shaft is displaced in the axial direction from the neutral position by the load torque from the worm wheel 104.

[0006] The torque switch 110 is disposed inside a device case 101 of the valve operating device 100.
The crankshaft 112 has an end engaged with a torque detecting portion 106c of the worm shaft 106 and rotated in accordance with the axial movement of the worm shaft 106.
This is a mechanism for changing the open / close state of the switch 113 for controlling the electric motor 107 when the rotation angle of the second motor becomes equal to or larger than a predetermined angle.

The opening indicator 120 is mounted on the device base 12 fixed to the device case 101 of the valve operating device 100.
1, a rotation shaft 123 formed of a substantially shaft-like body rotatably supported by the device base 121 and transmitting the rotation from the sleeve 102 via a speed reducer 122; A pointer 124 extending integrally from the end of the shaft 123 in the radial direction with respect to the rotation shaft 123 by a predetermined dimension, and a scale plate 125 fixed to the device base 121 near the pointer 124 in substantially parallel with the pointer 124. It is a configuration provided with:

The operation of the above-described conventional valve operating device 100 will be described. Worm shaft 10 with electric motor 107
6 is driven to rotate the sleeve 102 and the stem bush 103 via the worm wheel 104 to move the valve shaft to perform the valve opening / closing operation.
2, the rotation shaft 123 is also rotating. Rotating shaft 12
Along with the rotation of 3, the pointer 124, which is integral with the rotation shaft 123, rotates with respect to the scale plate 125, and the degree of opening of the valve can be visually recognized by a change in the position indicated by the pointer 124.

When the valve shaft cannot rotate, for example, when the valve is closed from the open state, the worm 106a of the worm shaft 106, which continues to rotate by receiving the driving force from the electric motor 107, increases the load torque to increase the worm wheel. 10
4, the worm shaft 106 moves in the axial direction by a distance corresponding to the load torque while receiving the urging force of the torque spring 106d. As the worm shaft 106 moves in the axial direction, the crankshaft 112 of the torque switch 110 to be engaged rotates, and the displacement of the worm shaft 106 is replaced by a rotational displacement. When the worm shaft 106 moves to an axial position corresponding to the load torque set in advance as an operation limit and the crankshaft 112 of the torque switch 110 rotates to a predetermined angle, the open / close state of the switch 113 is switched and the rotation of the electric motor 107 is started. Stop control. This torque switch 1
The tenth switch 113 rotates the worm shaft 106 in the opposite direction by rotating the electric motor 107 in the reverse direction, and the crank of the torque switch 110 is caused by the rotation of the worm shaft 106 in the opposite axial direction. When the shaft 112 rotates in the opposite direction to the above, it returns to the original open / closed state.

In the valve, when the operating mechanism and the valve shaft are integrated, if the valve is closed in a state where the valve is warmed by a pipe for supplying a high-temperature fluid, the temperature on the downstream side of the valve due to the inflow of the high-temperature fluid does not flow. The lowering causes a contraction of the valve shaft, which may lower the adhesion between the valve body and the valve seat and cause trouble. In order to prevent such a phenomenon, a buffer spring that urges the valve shaft to the valve closing side has been built into the operation mechanism, and the valve body is pressed against the valve seat to keep it tight even if the valve shaft contracts due to temperature drop. Is used. In the conventional valve operating device 100, a buffer spring 109 that constantly urges the stem bush 102 at the end of the valve shaft in the valve closing direction in the valve closed state is disposed in the device case 101, and when the temperature decreases in the closed state. Even if the valve shaft contracts, a force in the valve closing direction is applied to the valve shaft via the stem bush 102 by the urging of the buffer spring 109, and the valve body can be pressed against the valve seat.

[0011]

Since the conventional valve operating device is constructed as described above, the electric motor 107 is operated between the time when the valve is closed and the time when the torque switch 110 is operated and the electric motor 107 is stopped. When the driving torque is input to the subsequent stage by the rotation of the worm shaft 106, the stem bush 103, which transmits the torque via the worm wheel 104 and the sleeve 102, compresses the buffer spring 109 against the stopped valve shaft. The valve shaft is moved in the direction opposite to the valve closing direction, and the valve shaft is urged in the valve closing direction, and a driving force is absorbed by the buffer spring 109 to prevent an excessive force from being applied to the valve shaft. . However, the buffer spring 10
When the sleeve 102 rotates to transmit torque to the stem bush 103 until the state where the sleeve 9 operates, the sleeve 1
02 is not synchronized with the movement of the valve shaft, and the opening indicating device 1 displays the opening of the valve based on the rotation of the sleeve 102.
20 has a problem that the pointer 124 may move beyond the scale range of the scale plate 125 indicating the valve opening, and may be erroneously recognized as an abnormal operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and when the movement of the valve shaft and the rotation of the drive side shaft are not synchronized with each other due to the operation limit of the valve shaft, the movement of the valve shaft is reduced. It is an object of the present invention to provide an opening degree indicating device that separates a part indicating a state and a part indicating a rotation state of a driving side shaft so that any state can be accurately determined.

[0013]

An opening degree indicating device according to the present invention performs a predetermined movement from a fully closed position to a fully opened position in conjunction with a rotating drive side shaft and the drive side shaft. When the valve shaft reaches the fully-closed position or the fully-opened position of the valve and stops moving in the valve closing direction or the valve opening direction, the valve shaft is interlocked. A device base fixed to the device case of the valve operating device having at least a buffer portion that allows a slight angle rotation of the drive-side shaft, and a substantially shaft-like body rotatably supported by the device base. A rotation shaft formed and input from a drive-side shaft through a speed reducer having a predetermined reduction ratio, and a rotation shaft constantly rotating in association with the drive-side shaft, and a rotation shaft from an end of the rotation shaft. A rotation instructing portion extending in a radial direction with respect to the moving shaft to a predetermined dimension and integrally disposed, and A fixed display portion fixedly disposed on the device base and displaying a valve opening degree of the valve based on the position of the valve shaft so as to be visually recognized by a relative position change with respect to a rotation instruction portion. An auxiliary rotation instructing unit that extends a predetermined dimension in a radial direction with respect to the rotation shaft at an end of the rotation shaft and is disposed to be rotatable by a predetermined angle with respect to the rotation shaft;
The auxiliary rotation instructing portion is formed of a predetermined elastic member integrally connected to the rotation instructing portion, and the auxiliary rotation instructing portion is positioned relative to the rotation instructing portion unless a force is externally applied to the auxiliary rotating instructing portion. Interlocking means for maintaining a static stationary state, and an auxiliary rotation instruction unit integrated with the rotation instruction unit reaching in a state where the valve shaft has reached the valve fully closed position or the valve fully opened position. The device is arranged on the device base or the fixed display portion adjacent to a predetermined rotation position of the position, and is brought into contact with the auxiliary rotation instruction portion in a state where the drive side shaft rotates without interlocking the valve shaft. Restraint means for preventing rotation of the auxiliary rotation instruction section.

As described above, in the present invention, in addition to the rotation instructing unit that rotates integrally with the rotation shaft, the auxiliary rotation instructing unit is provided to double the instruction unit for the fixed display unit, In the state in which the valve shaft and the valve shaft are interlocked, the rotation instruction unit and the auxiliary rotation instruction unit that can be integrally rotated by the interlocking unit are equally rotated to indicate the valve opening degree accompanying the movement of the valve shaft, In a state in which the buffer portion is operated and the drive side shaft and the valve shaft are not linked, at a predetermined rotation position corresponding to the valve fully closed position or the valve fully open position of the valve shaft which is the operation start position of the buffer portion. The auxiliary rotation instructing portion is stopped by the restraining means, and the rotation instructing portion is linked with the driving side shaft as it is to instruct the rotation state of the driving side shaft, so that a buffer portion is provided between the driving side shaft and the valve shaft. Even if the drive-side shaft rotates while the valve shaft is stopped, the auxiliary rotation The valve opening can be correctly indicated by staying within the range indicating the opening, and the actual rotation state of the driving side shaft can be determined at a glance by the rotation instructing unit, and each state of the valve shaft and the driving side shaft can be determined. Correct recognition can be performed, and troubles due to erroneous recognition of the valve opening do not occur.

Further, the opening degree instructing device according to the present invention may be configured such that one end is integrally formed with the rotation instructing portion, and the other end is integrally formed with the auxiliary rotation instructing portion, as the interlocking means. It is provided with a predetermined spring body supported and rotatably disposed with respect to the fixed display unit. As described above, in the present invention, the spring body whose one end is integrally supported with the rotation instructing unit and whose other end is integrally supported with the auxiliary rotation instructing unit is provided, and the auxiliary rotation instructing unit is provided. Only when stopped by the restraining means and only the rotation instructing portion is turned, the spring body is deformed to allow relative rotation of the stopped auxiliary turning instructing portion with respect to the rotating turning instructing portion. At the same time, by generating a restoring force according to the amount of deformation, the transition from the state where the drive side shaft and the valve shaft are linked to the state where the drive side shaft and the valve shaft are not linked or vice versa. Also in this case, the spring body does not cause unnecessary movement of the auxiliary rotation instruction unit with respect to the rotation instruction unit, and it is possible to reliably control the interlocking of the rotation instruction unit and the auxiliary rotation instruction unit with a simple structure. As a result, the reliability of the opening degree indicating mechanism is greatly improved.

Further, in the opening degree instructing device according to the present invention, if necessary, the auxiliary rotation instructing portion is disposed so as to be in non-contact with the rotation instructing portion at any rotational position. The body is formed of a torsion coil spring, is disposed inside the coil-shaped portion through the rotation shaft so as to be rotatable by a predetermined angle on the rotation shaft, and has both ends protruding outside the coil-shaped portion approaching each other. , And in a state where a biasing force is generated, the two opposing ends are respectively brought into contact with both the rotation instructing portion and the auxiliary rotation instructing portion. As described above, in the present invention, both ends of the spring body formed by the torsion coil spring are disposed in contact with both the rotation instruction portion and the auxiliary rotation instruction portion, and the rotation instruction portion is rotated together with the rotation of the rotation shaft. Is rotated by a predetermined angle with respect to the fixed display unit, one end of the torsion coil spring is rotated by pressing one end of the torsion coil unit, and the auxiliary rotation instruction unit is also rotated by the other end of the torsion coil spring. When the auxiliary rotation instructing portion is in contact with the restraining means, the auxiliary rotation instructing portion and the other end of the torsion coil spring stop without moving any more, while rotating. The movement instructing part moves away from the other end of the torsion coil spring while pressing one end of the torsion coil spring,
By separating one end of the torsion coil spring from the auxiliary rotation instructing portion and expanding the angle between both ends of the torsion coil spring to continue the rotation, the both ends of the torsion coil spring are rotated in the rotation instructing portion and the auxiliary rotation instructing portion. The interlock between the auxiliary rotation instructing unit and the rotation instructing unit can be easily and reliably controlled by a simple mechanism that is not fixed to any of the movement instructing units, but can be configured at a low cost. .

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An opening indicating device according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1A is a plan view of an opening indicating device according to the present embodiment, FIG. 1B is an explanatory diagram of a state of indicating a deflection amount of a buffer spring in the opening indicating device according to the present embodiment, and FIG. FIG. 3A is a longitudinal sectional view of the opening degree indicating device according to the present embodiment, and FIG. 3A is a cross-sectional view of a main part of the opening degree indicating device according to the present embodiment, and FIG.
FIG. 2 is an explanatory diagram of a main part configuration of an opening degree instruction device according to the present embodiment.

As shown in the drawings, the opening degree indicating device 1 according to the present embodiment comprises a stem bush 103 to which a valve shaft (not shown) end is attached and a sleeve as a drive side shaft as in the prior art. A device base 11 fixed to the device case 101 of the valve operating device 100 in which a buffer spring 109 as a buffer portion is disposed between the device base 102 and a substantially shaft-like member rotatably supported by the device base 11. The rotation from the sleeve 102 is formed by a speed reducer 12 having a predetermined reduction ratio.
And a rotating shaft 13 that is always rotated in conjunction with the sleeve 102 and extends a predetermined dimension radially from the end of the rotating shaft 13 with respect to the rotating shaft 13 and is integrally provided. A first pointer 14 serving as a rotation instructing unit to be provided, and disposed near the first pointer 14 on the device base 11 so as to be fixed substantially in parallel with the first pointer 14, and a relative position with respect to the first pointer 14. A scale plate 15 as a fixed display unit for visually displaying the rotation angle of the rotation shaft 13 by a change;
A second indicator 16 as an auxiliary rotation instructing portion, which is extended by a predetermined dimension in a radial direction with respect to the rotation shaft 13 at an end of the rotation shaft 3 and is disposed so as to be rotatable by a predetermined angle with respect to the rotation shaft 13; Are formed in a torsion coil spring substantially parallel to each other, and are disposed inside the coil-shaped portion so as to be rotatable by a predetermined angle on the rotating shaft 13 through the rotating shaft 13 and generate biasing forces in directions approaching each other. A spring body 17 as an interlocking means in which the opposing sides of the both ends are respectively brought into contact with the first pointer 14 and the second pointer 16 and the second plate 16 is projected from a predetermined position of the scale plate 15 and It is configured to have a pointer 16 and a stopper 18 as a restraining means provided so as to be able to contact.

The speed reducer 12 is rotated from the sleeve 102 at a reduction ratio set such that the respective rotation positions of the rotation shaft 13 corresponding to the valve fully closed state and the valve fully opened state of the valve shaft are at 180 ° to each other. The motion is reduced and transmitted to the rotating shaft 13. The first indicator 14 has a structure in which a spring body pressing portion 14a protrudes toward the scale plate 15 in parallel with the rotating shaft 13 from a position radially away from the center of the rotating shaft 13 by a predetermined dimension. . Further, the second pointer 16 is rotated from the center of the rotation shaft 13 by a predetermined distance different from the spring body pressing portion 14a of the first pointer 14 in the radial direction.
And a pressed portion 16a protruding in a direction opposite to the scale plate 15 in parallel with.

The scale plate 15 is configured such that the valve opening from the fully closed state of the valve shaft to the fully opened state of the valve shaft is represented as a scale at predetermined intervals within a range of 180 °. In addition, a predetermined scale is added over a range of 45 ° before and after the above-mentioned range, and the first pointer 14 which is always interlocked with the rotation of the sleeve 102.
With this instruction, the amount of deflection of the buffer spring 109, which is changed by the axial movement of the stem bush 103 in conjunction with the rotation of the sleeve 102 when the valve shaft is stopped, can be visually recognized.

The spring body 17 is rotatably mounted on the rotating shaft 13 between the first hand 14 and the second hand 16 and has a spring between the two ends which are substantially parallel to each other. Body pressing part 1
4a and the pressed portion 16a of the second pointer 16 are in contact with each other with an urging force. This spring body 17
When the first pointer 14 and the second pointer 16 are in the rotation positions corresponding to the movement range from the fully closed state of the valve shaft to the fully opened state of the valve shaft, the second pointer It has a sufficient urging force capable of holding the hands 16 integrally.

The stopper 18 corresponds to the movement range of the valve shaft from the fully closed state to the fully opened state of the valve shaft.
At two positions where the second pointer 16 that rotates integrally with the second pointer 16 is in contact with the second pointer 16 at positions corresponding to the fully-closed state and the fully-opened state of the valve, the second pointer 16 has a height that allows contact with the second pointer 16 only. The configuration is such that it is arranged to protrude from the scale plate 15. The stopper 18 comes into contact with the second pointer 16 and the second pointer 1
6 is prevented from rotating out of the rotation range corresponding to the movement of the valve shaft from the fully closed state of the valve shaft to the fully open state of the valve shaft. Instructions are available.

Next, the operation of the opening instructing device based on the above configuration will be described. Worm shaft 106 with electric motor 107
To drive the sleeve 1 through the worm wheel 104.
02 and the stem bush 103 are rotated, and the valve shaft is moved to perform the valve opening / closing operation, the rotating shaft 13 also rotates in conjunction with the sleeve 102 as the driving side shaft,
The first pointer 14 integral with the rotating shaft 13 is
To rotate. With the rotation of the first pointer 14, the spring body 17 whose one end is pressed from the spring body pressing portion 14a of the first pointer 14 rotates integrally with the first pointer 14. And
When the pressed portion 16 a is pressed from the other end of the spring body 17, the second hand 16 also rotates integrally with the first hand 14 and the spring body 17. The change in the indicated position of the first and second hands 14 and 16 with respect to the scale plate 15 makes it possible to visually recognize the valve opening.

On the other hand, when the valve shaft cannot rotate, such as when the valve is closed from the open state, the second pointer 1
6 comes into contact with the stopper 18 and stops, and the pressed portion 16a
Is pressed by the spring body 17 and is constrained by the stopper 18 so that it does not move any more and indicates the rotation limit position of the valve on the scale plate 15. Then, the other end of the spring body 17 that comes into contact with the second pointer 16 is also stopped.

In a state where the valve shaft cannot rotate, when the drive torque is input to the subsequent stage from the worm shaft 106 by the rotation of the electric motor 107, the stem bush 10 to which the torque is transmitted via the worm wheel 104 and the sleeve 102.
3 moves in the axial direction opposite to the valve closing direction, that is, toward the sleeve 102 while compressing the buffer spring 109 against the stopped valve shaft. At this time, with the interlocking movement between the rotating shaft 13 and the sleeve 102, the first pointer 14, which is in contact with one end of the spring body 17 and the spring body pressing portion 14a,
7 while being deformed, the amount of deflection of the buffer spring 109 after the stop of the valve shaft can be visually recognized by a change in the designated position of the first pointer 14 with respect to the scale plate 15. At the same time, similarly to the conventional case, the worm shaft 106 receiving the driving force from the electric motor 107 receives a force in the direction opposite to the worm rotation direction due to the increase in the load torque, and the entire worm shaft 106 extends in the axial direction by a distance corresponding to the load torque. Go to

When the worm shaft 106 moves to an axial position corresponding to the load torque set in advance as an operation limit and the crankshaft 112 of the torque switch 110 rotates to a predetermined angle, the open / close state of the switch 113 is switched and the motor 107 Stops. When the motor 107 stops, the rotation of the sleeve 102 also stops, and the rotation shaft 13 and the first pointer 1
4 also shows the total deformation of the buffer spring 109 due to the rotation of the sleeve 102 after the valve shaft stops.

Further, the electric motor 107 rotates in the opposite direction to the above, and the switch 1 of the torque switch 110
13 returns to the original open / closed state, and the worm shaft 10
When the driving torque is input to the subsequent stage from the motor 6, the stem bush 103 to which the torque is transmitted via the worm wheel 104 and the sleeve 102 is moved in the axial direction opposite to the valve opening direction while the buffer spring 109 extends, that is, the sleeve 102. Moves toward the stopped valve axis. At this time,
With the interlocking movement between the rotating shaft 13 and the sleeve 102, the first pointer 14 rotates in a direction opposite to the above, and the deformation of the spring body 17 is performed while one end of the spring body 17 is in contact with the spring body pressing portion 14a. As the pressure is relaxed, the designated position with respect to the scale plate 15 is also changed.

The buffer spring 109 returns to its original position, and the sleeve 10
2 and the stem bush 103 and the valve shaft move synchronously, the first pointer 14 overlaps the second pointer 16, and the other end of the spring body 17 is brought into contact with the other end of the spring body 17 so that the first The pointer 14, the spring body 17, and the second pointer 16 are integrally rotatable in the opposite direction.

As described above, in the opening degree instructing device according to the present embodiment, the second pointer 16 is provided in addition to the first pointer 14 which rotates integrally with the rotation shaft 13 so as to indicate to the scale 15. In the interlocking state of the sleeve 102 and the valve shaft, the first pointer 14 and the second pointer 16 are turned together with being held together by the spring body 17 to indicate the valve opening degree, while the buffer spring 109 is In a state where the operation is stopped and the sleeve 102 and the valve shaft are not linked, the second pointer 16 is stopped by the stopper 18 and only the first pointer 14 is linked to the sleeve 102 to instruct the amount of deflection of the buffer spring 109. From
The sleeve 1 is provided with the buffer spring 109 and the valve shaft stopped.
Even when 02 rotates, the second pointer 16 stays within the range indicating the valve opening, and the valve opening can be correctly indicated, so that the operator can always correctly recognize the valve opening. Also, the amount of deflection of the buffer spring 109 can be determined by the first pointer 14, so that the state of the operating device can be accurately grasped.

In the opening degree indicating device according to the embodiment, the first pointer 14 is used as a rotation instruction part, the second pointer 16 is used as an auxiliary rotation instruction part, and the scale plate 15 is used as a fixed display part. Although it is configured to be disposed respectively, the present invention is not limited to this, while the rotation instruction unit and the auxiliary rotation instruction unit are formed as a rotating scale plate, while the fixed display unit is formed as a pointer, and It is also possible to adopt a configuration in which the scale moves to display the valve opening and the amount of deflection of the buffer spring.

In the opening degree indicating device according to the above embodiment, the spring body 17 is provided independently as the interlocking means. The second pointer 16 serving as an auxiliary rotation instructing section is provided with a pressed part 16a of the second pointer 16 or the first pointer 1
The spring-shaped portions that come into contact with each other with an urging force across the spring body pressing portion 14a of No. 4 may be integrally provided.

[0032]

As described above, according to the present invention, an auxiliary rotation instructing unit is provided in addition to the rotation instructing unit which rotates integrally with the rotating shaft, and the indicating unit for the fixed display unit is duplicated. In a state where the drive side shaft and the valve shaft are interlocked, the rotation instructing unit and the auxiliary rotation instructing unit which can be integrally rotated by the interlocking means are equally rotated to adjust the valve opening degree accompanying the movement of the valve shaft. On the other hand, in the state in which the buffer portion is operated and the drive side shaft and the valve shaft are not linked, the predetermined position corresponding to the fully closed position or the fully opened position of the valve shaft serving as the operation start position of the buffer portion is provided. At the rotation position, the auxiliary rotation instructing unit is stopped by the restraining means, and the rotation instructing unit instructs the rotation state of the driving side shaft in conjunction with the driving side shaft as it is, so that the rotation between the driving side shaft and the valve shaft can be performed. Even if the drive side shaft is rotated with the valve shaft stopped while the buffer portion is disposed between the auxiliary rotation instruction portion The valve opening can be correctly indicated by staying within the range indicating the valve opening, and the actual rotation state of the driving shaft can be determined at a glance by the rotation instructing unit, and each state of the valve shaft and the driving shaft can be determined. Can be recognized correctly, and the effect of preventing troubles due to erroneous recognition of the valve opening does not occur.

According to the present invention, a spring body is provided, one end of which is integrally supported with the rotation instructing portion and the other end of which is integrally supported with the auxiliary rotation instructing portion. Only when the indicator is stopped by the restraining means and only the rotation indicator is rotated, the spring body is deformed and the stopped auxiliary rotation indicator is rotated relative to the rotating rotation indicator. And by generating a restoring force according to the amount of deformation, a transition from a state in which the drive-side shaft and the valve shaft are interlocked to a state in which the drive-side shaft and the valve shaft are not interlocked or vice versa. The spring body does not cause unnecessary movement of the auxiliary rotation instructing part with respect to the rotation instructing part, and the interlock between the rotation instructing part and the auxiliary rotation instructing part is reliably controlled with a simple structure. Can be
This has the effect of greatly improving the reliability of the opening degree indicating mechanism.

Further, according to the present invention, both ends of the spring body formed of the torsion coil spring are disposed in contact with both the rotation instructing portion and the auxiliary rotation instructing portion, and are rotated together with the rotation of the rotating shaft. When the movement instructing part rotates a predetermined angle with respect to the fixed display part,
The torsion coil spring is also rotated integrally by being pushed at one end abutting on the rotation instructing part, and the auxiliary rotation instructing part is also integrally rotated by being pushed by the other end of the torsion coil spring. In a state in which the rotation instructing portion is in contact with the restraining means, the auxiliary rotation instructing portion and the other end of the torsion coil spring stop moving any further, and stop, while the rotation instructing portion presses one end of the torsion coil spring. By separating from the other end of the torsion coil spring, separating one end of the torsion coil spring from the auxiliary rotation instructing portion, and expanding the angle between both ends of the torsion coil spring to continue the rotation, the torsion coil spring is rotated. Both ends of the rotation instructing unit and the auxiliary rotation instructing unit can be reliably and reasonably controlled in cooperation with the auxiliary rotating instructing unit and the rotation instructing unit with a simple mechanism that only makes contact with the auxiliary rotating instructing unit without fixing. Constructs a low-cost, redundant indicator It has the effect that the kill.

[Brief description of the drawings]

FIG. 1 is a plan view of a degree-of-opening indicating device according to an embodiment of the present invention and an explanatory diagram of a state of indicating a deflection amount of a buffer spring.

FIG. 2 is a longitudinal sectional view of an opening degree indicating device according to one embodiment of the present invention.

FIG. 3 is a sectional view of a main part and an explanatory diagram of a main part configuration of the opening degree indicating device according to the embodiment of the present invention;

FIG. 4 is a cross-sectional view of a conventional valve operating device using an opening degree indicating device.

FIG. 5 is another cross-sectional view of a valve operating device using a conventional opening degree indicating device.

FIG. 6 is a longitudinal sectional view of a conventional opening degree indicating device.

[Explanation of symbols]

 1, 120 Opening degree indicating device 11, 121 Device base 12, 122 Reduction gear 13, 123 Rotating shaft 14 First hand 14a Spring body pressing portion 15, 125 Scale plate 16 Second hand 16a Pressed portion 17 Spring body 18 Stopper REFERENCE SIGNS LIST 100 valve operating device 101 device case 101 a bearing 102 sleeve 103 stem bush 104 worm wheel 105 clutch 106 worm shaft 106 a worm 106 b gear 106 c torque detector 106 d torque spring 107 electric motor 108 handwheel 109 buffer spring 110 torque switch 112 crankshaft 113 switch 124 Guidelines

Claims (3)

[Claims] The valve is disposed between a rotating drive-side shaft and a valve shaft of a valve that performs a predetermined movement from a fully-closed position to a fully-opened position in conjunction with the drive-side shaft. When the shaft reaches the fully-closed position or the fully-opened position and stops moving in the valve closing direction or the valve opening direction, the drive side shaft is allowed to rotate at a slight angle without interlocking the valve shaft. A device base fixed to a device case of a valve operating device having at least a buffer portion, and a substantially shaft-like body rotatably supported by the device base, and a predetermined deceleration of rotation from the drive side shaft. A rotating shaft which is inputted through a speed reducer having a specific ratio and is always rotated in association with the driving side shaft; and a predetermined dimension is radially extended from an end of the rotating shaft with respect to the rotating shaft to be integrally formed. A rotation instructing unit to be provided, and the valve shaft being fixed to the device base in the vicinity of the rotation instructing unit, And a fixed display unit that visually displays the valve opening degree of the valve based on the position of the valve by a change in the relative position with respect to a rotation instruction unit. An auxiliary rotation instructing unit extending in a radial direction by a predetermined dimension and arranged to be rotatable by a predetermined angle with respect to a rotation axis; and a predetermined coupling unit integrally connecting the auxiliary rotation instructing unit to the rotation instructing unit. An interlocking means formed of an elastic member for holding the auxiliary rotation instructing unit in a relative stationary state with respect to the rotation instructing unit unless a force is externally applied to the auxiliary rotating instructing unit; and when the valve shaft is fully closed. Corresponding to the position or the state where the valve has reached the fully opened position. And the drive shaft is rotated without interlocking the valve shaft. Opening indicator device, characterized in that it comprises a restraining means for rotational movement instructing unit and the contact to prevent rotation of the auxiliary rotation instructing unit. 2. The opening degree indicating device according to claim 1, wherein the interlocking means supports one end integrally with the rotation instruction unit and the other end integrally with the auxiliary rotation instruction unit. And a predetermined spring body rotatably disposed with respect to the fixed display unit. 3. The opening instructing device according to claim 2, wherein the auxiliary rotation instructing unit is disposed in non-contact with the rotation instructing unit at any rotational position, and the spring body is provided. Is formed of a torsion coil spring, is disposed inside the coil-shaped portion through the rotation shaft so as to be rotatable at a predetermined angle on the rotation shaft, and has both ends protruding outside the coil-shaped portion in a direction approaching each other. An opening in which the opposing sides of the two end portions are respectively brought into contact with both the rotation instructing portion and the auxiliary rotation instructing portion in a state where an urging force is generated. Pointing device.