JPH11107254A - Valve opening indicator deceleration device and valve driving actuator device incorporating therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change a deceleration ratio greatly and, at the same time, to provide a valve opening indicator deceleration device capable of easily change forward and reverse of a rotational direction of an output gear and a valve driving actuator device incorporating therewith. SOLUTION: A deceleration device 26 includes a main shaft 80 mounting a decelerating input gear 47 engaged with an input gear 43 fixed to an input side rotary shaft 41 in a rotatable manner, and a jack shaft 81 mounting a decelerating gear 84 engaged with the decelerating input gear 47 in a rotatable manner. Deceleration gear trains 49 capable of changing a transmission gear ratio by the number of gears to be used are mounted to the main shaft 80 and jack shaft 81 in a rotatable manner, and gears 82 and 83 engaged with the last stage decelerating gear 85 are fixed. A decelerating output gear 48 engaged with an output gear 44 fixed to an output side rotaty shaft 42 is fixed to the main shaft 80 or the jack shaft 81.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, for example, waterways,
Reduction device for a valve opening indicator that can be incorporated into a rotation transmission mechanism that drives and controls a valve such as a gate and a water gate in a flow path of a water purification plant and a valve driving actuator device incorporating the same About.

[0002]

2. Description of the Related Art At present, valve driving actuator devices provided in flow passages in various factories such as water purification plants and power plants are known.
It is suitable for centralized information system control using a controller from manual operation. The valve drive actuator device that transfers the diagnosis of the valve drive actuator itself to the host computer by data transfer requires large-scale equipment.
If there is an abnormality in the valve drive actuator, it is necessary to go to the site for inspection and repair, and the repair and inspection work becomes expensive, and maintenance costs and the like are undesirably increased. In general, the valve controller itself has almost no check function, and the user goes to the place where the valve drive actuator is installed and checks regularly, and the check itself is also inaccurate. However, there is a problem that the inspection cost increases.

[0003] In the valve drive actuator device, processing of all controls by a central information system requires a large-scale device and a complicated structure. A system for performing distributed processing has been adopted.
In the valve drive actuator device, the basic information for controlling the flow path is the opening degree, flow rate, flow velocity, etc. of various gates and valves provided in the flow path. Many types of motorized valve driving actuator devices are known as driving means for controlling the adjustment.
(See, for example, JP-A-62-292978,
4-49778). Further, in order to control a valve driving actuator device by a controller, a device using various control devices such as a torque switch and a limit switch is known (for example, Japanese Patent Application Laid-Open No. Sho 64-79407, Japanese Utility Model Publication No. 5-37373). Bulletin, Jitsuhei 6-353
No. 43).

[0004] In a conventional valve drive actuator device, a speed reducer for a valve opening indicator is incorporated in a rotation transmission mechanism, but the rotation speed reduction ratio of the speed reducer requires a drastic change. That is, the rotation speed of the rotary shaft for moving the valve up and down varies, for example, from 1 rpm to 100 rpm, and the changed rotation speed of the rotary shaft is defined as the rotation angle of the pointer of the indicating device, for example, 0 ° to 100 rpm. Need to decelerate to 270 °. Therefore, in the reduction gear incorporated in the valve drive actuator device, the rotation reduction ratio is 1/2 to 2
About 1/2000 is required.

[0005]

However, there is no speed reducer incorporated in the conventional valve drive actuator device that can cope with the above-described speed reduction ratio (1/2 to 1/2000). Many types of reduction gears having a reduction ratio of 1/2, 1/4, 1/8 to 1/2000 are prepared, and the reduction gear is selected according to the required reduction ratio. It is the current situation. In addition, since the reduction gears require both types in which the output shaft rotates in the forward and reverse directions, it is necessary to prepare a type in which the rotation is reversed, and select the type according to the needs of the output shaft rotation direction. Therefore, it is necessary to prepare extremely different types of reduction gears, and the manufacturer has to prepare other types of reduction gears, so that there is a problem that the stock amount becomes large.

Further, the valve driving actuator device has an operation circuit, that is, an operation controller inside the valve driving actuator device so as to enable distributed processing.
A part of the control system can be borne, and the open / close control of the valve opening / closing time, that is, the valve opening / closing speed, etc. can be automatically and automatically controlled and self-controlled very easily. Various control devices such as torque switches, limit switches, and indicating devices that constitute the controller built into the device are housed in separate cases, and these various cases are replaced with a case with an explosion-proof waterproof cover. Must be contained within
Therefore, the device itself had to be large, and the valve drive actuator device could not be made compact.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem. The reduction ratio can be largely changed only by selecting the number of reduction gears in a reduction gear train.
Provides a compact speed reducer for the valve opening indicator that can easily change the rotation direction of the output shaft in both forward and reverse directions and can be mounted between the mounting plates, and controls the valve drive actuator device. The electrical components for operation are collectively housed in a case equipped with an explosion-proof waterproof cover, and the speed reducer for the valve opening indicator is incorporated in the rotation transmission mechanism from the rotating shaft to the indicating device. The limit switch and the torque switch are directly mounted between the mounting plates in the case, and the number of parts of the device itself is reduced by eliminating the need to house each in a separate case as in the past. An object of the present invention is to provide a valve drive actuator device which is configured to be compact.

According to the present invention, there is provided an input-side rotary shaft driven in correspondence with the rotation of a rotary shaft for driving a valve and rotatably supported by a mounting plate; an input gear fixed to the input-side rotary shaft; A main shaft rotatably mounted on the mounting plate and rotatably supported by the mounting plate; a main shaft rotatably supported by the mounting plate, rotatably supported by the mounting plate and rotatably supported by the mounting plate; A countershaft in which a meshing reduction gear is rotatably mounted, a reduction gear train rotatably mounted on the main shaft and the countershaft and meshing with each other, and meshing with the last reduction gear of the reduction gear train; A ring gear fixed to the main shaft and the counter shaft, a reduction output gear fixed to the main shaft or the counter shaft, and an output gear meshing with the reduction gear are provided. Vignetting and rotatably supported output rotary shaft to the mounting plate, and a speed reduction device for a display device, the valve opening degree indicator consisting of displaying the rotation rate of said output rotary shaft as the valve opening.

The speed reducer for a valve opening indicator has a structure in which the output gear for rotation is fixed to the main shaft in the rotation direction and the rotation direction of the output gear is fixed to the sub shaft in the rotation direction. The rotation direction is opposite to the rotation direction of the output gear.

[0010] The selection of fixing the reduction output gear to the main shaft or the sub shaft in the rotation direction is determined by the rotation direction required for the output side rotation shaft.

[0011] Further, the rotation reduction ratio from the input side rotation shaft to the output side rotation shaft is adjusted by the number of reduction gears of the reduction gear train incorporated in the main shaft and the sub shaft. .

A collar is arranged in a gap between the ring gear and the mounting plate, which is generated by the number of reduction gears of the reduction gear train.

[0013] The display device includes a scale plate fixed to the mounting plate and a pointer mounted on the output-side rotating shaft.

The reduction input gear and the reduction gear of the reduction gear train have a structure in which an input-side large-diameter gear and an output-side small-diameter gear are integrally formed.

Since the speed reducer for the valve opening indicator is configured as described above, the rotational speed reduction ratio from the input-side rotary shaft to the output-side rotary shaft is determined by the ratio between the main shaft and the sub-shaft. By changing the number of the reduction gears of the reduction gear train incorporated in the vehicle according to the reduction ratio, a desired speed ratio can be easily and reliably obtained. Further, by fixing the output gear for reduction to the main shaft or the countershaft, the rotation direction of the output gear can be easily and reliably changed.

According to another aspect of the present invention, there is provided a spindle equipped with a valve for opening and closing a flow path, a rotating shaft for rotating the spindle for reciprocating drive, a manual driving mechanism for rotating the rotating shaft by a manual handle, or the rotating shaft. A drive switching device for switching the shaft to an electric drive mechanism for rotating and driving the shaft by a motor, a rotation transmission mechanism for reducing the rotation of the rotation shaft and transmitting the rotation amount to the display device for displaying the rotation amount, and being incorporated in the rotation transmission mechanism. A speed reducer for a valve opening indicator according to any one of claims 1 to 7, a switch unit incorporated in the rotation transmission mechanism, a terminal unit connected to the switch unit, and the switch unit. And a controller for controlling the opening and closing of the valve by exchanging information about the valve through the terminal unit. Valve to a drive actuator device.

Since the valve drive actuator device is configured as described above, the rotation transmission mechanism incorporating the switch unit and the terminal unit can be accommodated in one case, and provided in the rotation transmission mechanism. The switch unit and the terminal unit can be securely sealed with separate explosion-proof and waterproof covers, and the entire device can be made compact and the connection of control devices can be simplified.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of a speed reducer for a valve opening indicator according to the present invention;

First, an embodiment of a speed reducer for a valve opening indicator according to the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view showing one reduction ratio of a reduction gear for a valve opening indicator according to the present invention, and FIG. 2 is a cross-sectional view showing a state where the reduction gear ratio of the reduction gear for the valve opening indicator of FIG. 1 is changed. FIG.

The speed reducer 26 for the valve opening indicator reduces the rotation of the input side rotary shaft 41 and transmits it to the output side rotary shaft 42. The input-side rotary shaft 41 is connected to a valve 21 described later.
It is driven in accordance with the rotation of the rotating shaft 8 (FIG. 5) for driving the (FIG. 3) up and down. As will be described later, as shown in FIG. 5, the rotation of the rotating shaft 8 rotates the rotating shaft 13 through the gear mechanism 38, and the rotation of the rotating shaft 13 is controlled by the gear mechanism 40.
Is transmitted to the input side rotating shaft 41 through the The rotation ratio of the output side rotation shaft 42 is displayed as a valve opening degree on the display device 15.
Is transmitted to the pointer 45. The reduction gear 26 includes an input-side rotating shaft 41 rotatably supported by the mounting plate 14, a main shaft 80 rotatably supported by the mounting plate 14 arranged in parallel with the input-side rotating shaft 41, and a parallel with the main shaft 80. Has a countershaft 81 rotatably supported by the mounting plate 14 disposed at the same position.

The reduction gear 26 is rotatably mounted on the input gear 43 fixed to the input-side rotary shaft 41, the main shaft 80 and rotatably mounted on the reduction input gear 47 meshing with the input gear 43 and the sub shaft 81. And input gear 4 for reduction
7, a reduction gear train 4 attached to the main shaft 80 and the countershaft 81 and meshing with each other.
9, a ring gear 82 meshed with the final reduction gear 85 of the reduction gear train 49 and fixed to the main shaft 80, a ring gear 83 meshed with the ring gear 82 and fixed to the sub shaft 81, the main shaft 80 or the sub shaft 81. An output gear 48 fixed to the output gear 48 and an output gear 44 meshing with the output gear 48 for reduction are attached to the output shaft 44 and rotatably supported by the mounting plate 14.

In the reduction gear for the valve opening indicator, the reduction gear 85 of the reduction gear train 49 and the input gear 47 for reduction are used.
Has a structure in which an input-side large-diameter gear 86 and an output-side small-diameter gear 87 are integrally formed. Further, the reduction input gear 47 and the reduction gear 85 of the reduction gear train 49 are rotatable about the main shaft 80 and the sub shaft 81 so that adjacent gears on the main shaft 80 and the sub shaft 81 can rotate relative to each other. Installed. Further, the rotation direction of the output gear 44 when the reduction output gear 48 is fixed to the main shaft 80 in the rotation direction, and the output gear 4 when the reduction gear 48 is fixed to the sub shaft 81 in the rotation direction.
4 is output in a direction opposite to the rotation direction.
The choice of fixing the reduction output gear 48 to the main shaft 80 or the sub shaft 81 in the rotation direction is determined by the rotation direction required for the output side rotation shaft 42.

The rotation reduction ratio from the input side rotation shaft 41 to the output side rotation shaft 42 can be adjusted by the number of reduction gears 84 of the reduction gear train 49 incorporated in the main shaft 80 and the sub shaft 81. . That is, in the reduction gear 26 shown in FIG. 1, the number of reduction gears 84 in the reduction gear train 49 is two, and
In contrast to the three-speed reduction, in the reduction gear 26 shown in FIG. 2, the number of reduction gears 84 in the reduction gear train 49 is eight, which is a nine-speed reduction. Accordingly, the reduction gear 26 shown in FIG. 2 can be configured to have a larger reduction ratio than the reduction gear 26 shown in FIG.

A collar 86 is arranged in a gap between the ring gears 82 and 83 and the mounting plate 14 which is generated by the number of the reduction gears 84 of the reduction gear train 49, and play may occur in the reduction gear train 49. Has been prevented. The display device 15 includes a scale plate 4 fixed to the mounting plate 14.
6 and a pointer 45 attached to the output side rotation shaft 42.

An embodiment of the valve drive actuator device according to the present invention will be described below with reference to FIGS. FIG. 3 is a schematic diagram of a partial cross section showing a valve driving actuator device according to the present invention, FIG. 4 is a front view showing a part of the valve driving actuator device, and FIG. FIG. 6 is a cross-sectional view showing a main part of the valve drive actuator device, FIG. 7 is a side view of the valve drive actuator device of FIG. 6, and FIG. 8 is a view of the valve drive actuator device of FIG. Sectional view showing a part,
9 is an explanatory view of a partial cross section showing the switch unit of the valve drive actuator device of FIG.

The valve drive actuator device according to the present invention is particularly applicable to the speed reduction device 2 in the rotation transmission mechanism 20.
6 is characterized in that a speed reducer 26 for a valve opening indicator as shown in FIG. This valve driving actuator device can extract the open / closed state of the flow path of the valve 21 or various information by detecting the number of rotations of the rotating shaft 8. Drive control is performed.

The speed reducer for the valve opening indicator generally comprises a spindle 1, which is a valve rod reciprocally mounted on a mounting body 6 in a housing 5, and a flow path such as a water channel mounted on the spindle 1. 57, a valve 21 for adjusting the flow rate, a controller 25 comprising electric components 19 constituting control equipment for controlling the drive of the spindle 1 according to various information, a manual handle 12 for manually driving the spindle 1, It has a motor 11 for automatically driving the spindle 1 and a spindle cover 22 attached to the mounting body 6 to cover the spindle 1. This valve drive actuator device is configured such that, for example, a built-in controller 25 receives a command from a central controller, controls the drive of the valve 21 under the control of the controller 25, and controls the opening and closing of the flow path 57 by the valve 21. The flow rate sensor (not shown), the limit switch 28,
The controller 25, which is detected by each sensor such as the torque switch 27 and receives the information, controls opening and closing adjustment of the valve 21 to an optimum state according to each information on the valve 21 and the flow path 57.

This valve driving actuator device includes a worm 10 meshing with a worm wheel 9 which is rotationally driven to reciprocately drive a spindle 1 and a spindle 1 which constitute a valve stem on which a valve 21 for opening and closing a flow path 57 is mounted. A rotary shaft 8 mounted and rotatably mounted on the mounting body 6, a drive switching device 2 for switching to a manual drive mechanism for rotating and driving the rotary shaft 8 by a manual handle 12 or an electric drive mechanism for rotating and rotating the rotary shaft 8 by a motor 11. ,
A reduction gear 2 shown in FIG. 1 or FIG.
, A switch unit 3 incorporated in the rotation transmitting mechanism 20, a valve 21 and a flow path 5
7 includes a terminal unit 4 connected to a switch unit 3 for exchanging various information and a controller 25 for controlling the switch unit 3.

In this valve driving actuator device, the drive switching device 2 is switched to a manual drive mechanism by operating a manual switching lever 18, and the switching to the electric drive mechanism is automatically performed according to the rotation of the motor 11. Switching is automatically performed by the return mechanism unit 32. The rotating shaft 8 is rotatably supported by the mounting bodies 6 and 61 by bearings 63. The rotating shaft 53 rotated by the manual handle 12 is rotatably supported on the mounting body 6 by a bearing 64. The operation shaft 62 rotated by the manual switching lever 18 is rotatably supported by the mounting body 6. The rotating shaft 8, the rotating shaft 53 and the operating shaft 62 are arranged in parallel with each other, and the manual handle 12 and the manual switching lever 18 are arranged.
Is drivingly connected to a rotating shaft 8 for driving the spindle 1 to rotate. The rotating shaft 8 is provided with a spline 3 so that the rotating shaft 8A provided with the worm 10 and the sleeve 34 can slide.
5 is composed of a fitted rotating shaft 8B.

The sleeve 34 is formed at its one end with claws or dog teeth forming the meshing clutch 31, and at the other end with a gear 55. On the rotating shaft 8B, an automatic return mechanism unit 32 provided with the other claw of the dog clutch 31, that is, a dog tooth, is rotatably provided. When the dog clutch 31 is engaged, the dog teeth of the sleeve 34 and the dog teeth of the automatic return mechanism unit 32 are engaged. Further, a gear 33 meshing with a gear 59 provided on an output shaft 72 of the motor 11 is rotatably provided on the rotating shaft 8B. Further, a cushioning member 60 is provided between the automatic return mechanism unit 32 and the gear 33.
Is interposed. Cam yoke 56 provided on operation shaft 62
Engages with a groove 65 provided on the outer peripheral surface of the sleeve 34, and when the cam yoke 56 is rotated by the rotation of the operation shaft 62 by the manual switching lever 18, the sleeve 34 is slidably moved on the rotation shaft 8 so that the meshing clutch 31 Can be connected and disconnected. The sleeve 34 is disengaged from the meshing clutch 31 by the manual switching lever 18 against the spring force of the spindle 36 and slides, and the gear 55 provided on the rotating shaft 53 rotated by the gear 55 of the sleeve 34 and the manual handle 12. And will be engaged. When the gear 55 and the gear 54 mesh with each other, the operation is switched to a manual drive mechanism that rotates the rotary shaft 8 with the manual handle 12.

The valve driving actuator device is shown in FIG.
As shown in FIG. 7, the rotation transmitting mechanism 20 is housed in the case 7 which houses a plurality of mounting plates 14 attached to the mounting body 6 and arranged in parallel at a distance from each other. , A reduction gear 26 constituting a part of a rotation transmission mechanism 20 for transmitting the rotation of the rotating shaft 8 and at least a torque switch 27 and a limit switch 28 constituting a switch unit 3 are mounted, respectively. It is characterized by having a compact structure.

The switch unit 3 is composed of a counter mechanism and is housed in a case 7 attached to the attachment body 6. The switch unit 3 includes a unitized torque switch 27 for detecting the torque of the rotating shaft 8,
It has at least a limit switch 28 for detecting the upper and lower limits of the reciprocating movement of the valve 21. Torque switch 2
7 is a switch mechanism 27A for detecting the torque of the rotating shaft 8 and two microswitches 29 (provided on the torque switch 27) for detecting the overtorque state of the upper and lower limits of the valve opening direction and the valve closing direction. (Only one is shown). The limit switch 28 is provided with a switch mechanism 28A for detecting the upper and lower limits of the reciprocating movement of the valve 21.
And two microswitches 30 (only one is shown) for detecting the upper and lower limits of the reciprocating movement of the valve 21. The switch unit 3 has a flicker switch 37S (FIG. 6), an interlock switch 66 (FIG. 7), and a potentiometer that constitutes a transmitter 67 for indicating the opening degree distant place, in addition to the above-described control devices. An explosion-proof waterproof cover 16 is provided in the case 7 for housing the switch unit 3 in order to isolate the inside from the outside.

The terminal unit 4 is mounted on the mounting body 6 adjacent to the switch unit 3. An explosion-proof waterproof cover 17 is provided in the case 7 for housing the terminal unit 4 in order to shut off the inside from the outside. The terminal unit 4 constitutes a power terminal composed of an input terminal 68 connecting each controller of the switch unit 3 and the controller 25 and an output terminal 69 connected to the switch unit 3 via the printed circuit board 70. The input terminal 68 and the output terminal 69 are hermetically sealed in the terminal body 71.

Further, a mounting body 6 constituting the housing 5
Is mounted with a control case 23 containing a controller 25. The controller 25 includes an electric component 19 including at least a magnet switch for controlling the switch unit 3. The control case 23 is
An explosion-proof waterproof cover 58 is provided to shut off the inside from the outside. The controller 25 is connected to one terminal of the terminal unit 4 and exchanges information with various control devices of the switch unit 3 to control the operation of the valve 21 in an optimal state.

Further, the drive switching device 2 is provided with a meshing clutch 31 which is disengaged by the manual switching lever 18 and an automatic return mechanism 32 for switching to driving of the electric drive mechanism by rotation of the motor 11. The drive switching device 2
Normally, the driving state by the motor 11 is set by the automatic return mechanism unit 32. When the operator manually operates the valve driving actuator device by checking the valve driving actuator device or the like, the manual switching lever 18 causes the manual handle 12 to operate. It is switched so that it can be operated.

The operation of the valve drive actuator device when driven by the motor 11 is as follows. First, the motor 11 receives various information, and
It rotates by the command from 5. The drive of the motor 11 rotates the gear 33 rotatably attached to the rotary shaft 8 via the gear 59 to operate the automatic return mechanism unit 32. Automatic return mechanism unit 3 by rotation of motor 11
2 operates, the sleeve 34 engages with the spring force of the spring 36, and the clutch 31 is connected.
The rotation of the gear 37 is transmitted to the, and the sleeve 34 rotates. A spline 35 is formed on the inner peripheral surface of the sleeve 34, and the spline 35 of the sleeve 34 is spline-fitted with the spline 35 formed on the rotating shaft 8, so that the rotation of the sleeve 34 is transmitted to the rotating shaft 8. Is done.
The rotation of the rotation shaft 8 causes the worm 10 attached to the rotation shaft 8 to rotate.
Is driven to rotate. Rotary axis 8
The worm 10 is rotated by the rotation of
The worm wheel 9 that meshes with the shaft rotates. The rotation of the worm wheel 9 is performed by a female screw 56S (FIG. 3) through a driving force transmission mechanism (not shown) that converts the rotational motion into a vertical motion.
, The spindle 1 provided with the male screw 73 meshing with the female screw 56S moves up and down. Since the valve 21 is attached to the tip of the spindle 1, the valve 21 moves up and down, and the flow path 57 is adjusted to open and close. On the other hand, the rotation of the rotating shaft 8 is transmitted to the rotating shaft 13.

In this valve driving actuator device, the rotation of the rotating shaft 8 is controlled by the gear mechanism 38 to rotate the rotating shaft 1.
3 is transmitted. The rotation of the rotating shaft 13 is controlled by the rotation transmitting mechanism 2.
0, the display device 1 is decelerated by the speed reduction device 26.
5 is transmitted as the rotation of the pointer 45. Reduction gear 26
Is decelerated along the transmission path described with reference to FIG. 1 or FIG. That is, the rotation of the rotation shaft 13 is transmitted as the rotation of the input rotation shaft 41 through the gear mechanism 40. The rotation of the input gear 43 provided on the input side rotation shaft 41 is
Is reduced by the plurality of reduction gear trains 49 of the reduction gear 26 and transmitted to the reduction output gear 48 of the reduction gear 26. The rotation of the reduction output gear 48 is transmitted to the output gear 44 fixed to the output-side rotation shaft 42 and output as rotation of the output-side rotation shaft 42.

A pointer 45 is attached to an end of the output side rotating shaft 42. A scale plate 46 is attached to one of the plurality of attachment plates 14 fixed in the case 7. The scale plate 46 can be seen through a transparent plate 50 provided on the explosion-proof waterproof cover 16. The pointer 45 can visually detect the opening / closing degree of the valve 21 by rotating and moving on the scale plate 46.

In this valve driving actuator device, the rotating force of the rotating shaft 8 is transmitted to the rotating shaft 13A via the gear mechanism 38A and the torque shaft 39, and the rotating shaft 1 is rotated.
The rotation of 3A is performed by the torque switch 27 via the gear mechanism 51.
Of the torque switch 27
As a result, the torque of the rotating shaft 8 is detected. The operating state of the torque switch 27, that is, the state of overtorque at the upper limit and the lower limit is input to the controller 25 through the microswitch 29. The rotation of the rotating shaft 8 is transmitted to the rotating shaft 13 via the gear mechanism 38, and the rotation of the rotating shaft 13 rotates the input-side rotating shaft 41 via the gear mechanism 40. The rotation of the input side rotation shaft 41 is controlled by the switch mechanism 28 of the limit switch 28 composed of a counter mechanism via a gear mechanism 52.
A and transmitted to the rotating shaft 8 by the limit switch 28.
Is detected. The operating state of the limit switch 28, that is, the upper and lower limits, is input to the controller 25 through the micro switch 30.

Next, this valve driving actuator device when operated by the manual handle 12 is as follows. First, to operate the drive switching device 2, the manual switching lever 18 is rotated, and the cam yoke 56 fitted to the sleeve 34 is rotated. The rotation of the cam yoke 56 causes the sleeve 34 to slide on the rotating shaft 8 against the spring force of the spring 36, disengages the sleeve 34 from the clutch 31 and releases the drive connection with the motor 11. Further, by rotating the cam yoke 56, the sleeve 34 is rotated.
Is slid, the gear 55 of the sleeve 34 meshes with the gear 54 provided on the rotating shaft 53 to which the manual handle 12 is attached.

By the above operation, the gear 5 of the sleeve 34
When the manual handle 12 is rotated after the gear 5 and the gear 54 provided on the rotating shaft 53 are engaged with each other, the rotating shaft 53
Is rotated, and the rotation is transmitted from the gear 54 to the gear 55 to rotate the sleeve 34. As the sleeve 34 rotates, the rotating shaft 8 rotates. By the rotation of the rotating shaft 8, the worm 10 rotates, and the worm wheel 9 meshing with the worm 10 rotates. As the worm wheel 9 rotates, the valve 21 moves up and down by the same transmission path as described above, and the flow path 57 is adjusted to open and close. On the other hand, the rotation of the rotating shaft 8 is transmitted to the rotating shaft 13. In the same manner as described above, the rotation of the rotary shaft 13 can rotate the display device 15 including a pointer and the like, and can transmit information to the torque switch 27 and the limit switch 28.

[0042]

Since the speed reducer for a valve opening indicator is constructed as described above, the rotational speed reduction ratio from the input side rotary shaft to the output side rotary shaft is determined by the number of reduction gears. The rotation direction of the output gear can be easily changed by simply changing the attachment of the output gear for reduction to either the main shaft or the counter shaft. There is no need to prepare a reduction gear, it is only necessary to prepare a large number of reduction gears of the reduction gear train, and it is possible to obtain a desired reduction ratio and to cope with both forward and reverse rotation directions of the output gear. The amount can be reduced, and the manufacturing cost can be significantly reduced.

Since the valve drive actuator device is configured as described above, the number of parts can be reduced as compared with the conventional device, and the device itself can be made compact. In this case, the control devices for the torque switch and the limit switch can be properly arranged between the adjacent mounting plates, and the structure can be optimally adapted to legal regulations.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one reduction ratio of a reduction gear for a valve opening indicator according to the present invention.

FIG. 2 is a cross-sectional view showing a state where the reduction ratio of the reduction gear for the valve opening indicator of FIG. 1 is changed.

FIG. 3 is a schematic view of a partial cross section showing a valve driving actuator device according to the present invention.

FIG. 4 is a front view showing a part of the valve driving actuator device.

FIG. 5 is a side view showing a part of the valve drive actuator device of FIG. 4;

FIG. 6 is a sectional view showing a main part of the valve drive actuator device.

FIG. 7 is a side view of the valve drive actuator device of FIG. 6;

FIG. 8 is a sectional view showing a part of the valve drive actuator device of FIG. 6;

FIG. 9 is an explanatory view of a partial cross section showing a switch unit of the valve drive actuator device of FIG. 6;

[Explanation of symbols]

 Reference Signs List 1 spindle 2 drive switching device 3 switch unit 4 terminal unit 7 case 8,13 rotating shaft 11 motor 12 manual handle 14 mounting plate 15 display device 16,17 explosion-proof waterproof cover 20 rotation transmission mechanism 21 valve 26 reduction gear 27 torque switch 28 limit Switch 41 Input-side rotating shaft 42 Output-side rotating shaft 43 Input gear 44 Output gear 45 Pointer 46 Scale plate 47 Reduction input gear 48 Reduction output gear 49 Reduction gear train 80 Main shaft 81 Sub shaft 82,83 Ring gear 84,85 Reduction Gear 86 Collar 87 Large-diameter input gear 88 Small-diameter output gear

Claims (8)

[Claims] 1. An input-side rotating shaft driven in accordance with the rotation of a valve-driving rotating shaft and rotatably supported by a mounting plate, an input gear fixed to the input-side rotating shaft, and an input gear. A main shaft rotatably mounted on the mounting plate and rotatably supported by the mounting plate, a reduction shaft arranged in parallel with the main shaft and rotatably supported by the mounting plate and meshing with the reduction input gear; A reduction gear train rotatably mounted on the main shaft and the sub-shaft, respectively, rotatably mounted on the main shaft and the sub-shaft, meshing with a reduction gear at the final stage of the reduction gear train, and A ring gear fixed to the countershaft, an output gear for reduction fixed to the main shaft or the countershaft, an output gear meshing with the output gear for reduction are attached, and A speed reducer for a valve opening indicator, comprising: an output-side rotation shaft rotatably supported by the mounting plate; and a display device for displaying a rotation rate of the output-side rotation shaft as a valve opening. 2. The rotation direction of the output gear when the output gear for reduction is fixed to the main shaft in the rotation direction is opposite to the rotation direction of the output gear when the output gear for rotation is fixed to the sub shaft in the rotation direction. 2. The reduction gear for a valve opening indicator according to claim 1, wherein the reduction gear is a direction. 3. The valve according to claim 1, wherein the selection of fixing the reduction output gear to the main shaft or the countershaft in the rotation direction is determined by a rotation direction required for the output-side rotation shaft. Speed reducer for opening indicator. 4. A reduction ratio of rotation from the input side rotation shaft to the output side rotation shaft is adjusted by the number of reduction gears of the reduction gear train incorporated in the main shaft and the sub shaft. The speed reducer for a valve opening indicator according to claim 1. 5. The valve opening indicator according to claim 1, wherein a collar is disposed in a gap between the ring gear and the mounting plate generated by the number of reduction gears of the reduction gear train. Speed reducer for 6. The deceleration for a valve opening indicator according to claim 1, wherein the display device comprises a scale plate fixed to the mounting plate and a pointer mounted on the output side rotation shaft. apparatus. 7. The valve opening according to claim 1, wherein the reduction input gear and the reduction gear of the reduction gear train have a structure in which an input-side large-diameter gear and an output-side small-diameter gear are integrally formed. Speed reducer for indicator. 8. A spindle provided with a valve for adjusting the opening and closing of the flow path, a rotating shaft for rotating the spindle for reciprocating drive, a manual drive mechanism for rotating the rotating shaft by a manual handle, or a motor for rotating the rotating shaft. 2. A drive switching device that switches to an electric drive mechanism that drives to rotate, a rotation transmission mechanism that reduces the rotation of the rotation shaft and transmits the rotation amount to the display device that displays the amount of rotation, and is incorporated in the rotation transmission mechanism. 8. The speed reducer for a valve opening indicator according to any one of 7 to 7, a switch unit incorporated in the rotation transmission mechanism, a terminal unit connected to the switch unit, and the switch unit and the terminal unit. For controlling the opening and closing of the valve by exchanging information about the valve through the valve Eta device.