JPS5829431B2 - handle rotation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handle rotation device, and more particularly to a handle rotation device suitable for remotely opening and closing a manual valve.

The need to temporarily replace existing manual valves with remote-controlled automatic valves is a problem that often arises at chemical plants and nuclear couple plants.

The purpose of this is to open and close a large number of manual valves at once, and to save labor during system repairs, tests, and restoration, as well as for emergency operation of manual valves when the plant is in a dangerous state. This problem also arises with the aim of improving the safety of personnel.

Conventionally, this type of device for converting a manual valve into an automatic valve was disclosed in Japanese Patent Publication No. 50-32158, as shown in Fig. 1, by removing the handle 1 and gland flange 2 of the valve, and attaching the valve body 3 to the valve body 3 with a bond. A fixed type was commercially available.

The valve opening/closing machine 5 has a main body fixed to the valve box 3 by bonding, and the valve stem 4 is rotated by coupling the valve stem 4 with an actuator in the main body of the valve opening/closing machine 5.

The reaction force of rotation when the valve stem 4 is turned by an actuator to open and close the valve is transmitted through the main body of the valve opening/closing machine 5 and is supported by the valve box 3 to which this is connected.

In the past, such a device had to be connected to the valve in two places, the valve stem 4 and the valve body 3, and all connections were made with bolts or bolts.
Since it is done with a nut, installation and removal are troublesome and time consuming.

This is because the purpose of this type of device is not to temporarily convert a manual valve to an automatic valve, but to leave it attached to one valve for a certain period of time.

Furthermore, it is heavy at about 50 kg, and is difficult to install and remove.

Therefore, the valve opening/closing machine as shown in FIG. 1 is not suitable for the purpose of attaching and detaching a manual valve at any time and making it an automatic valve only when necessary.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and provide a handle rotation device that is small and lightweight, can be easily attached to and detached from a manual valve, and can remotely and automatically operate the manual valve at any time. It is in.

In order to achieve the above object, the present invention includes a cylindrical casing fixed to a handle, a drive device attached to the casing, and a rotation shaft coaxial with the axis of the handle that is rotated by the drive device. and a protrusion formed inside the housing, and a striker for striking the protrusion that is movable in the radial direction of the housing connected to the rotating shaft, and the striker strikes the protrusion in an intermittent manner. The invention is characterized in that it is equipped with a rotating device that rotates the handle while making a reaction torque when the handle is rotated non-reactive by the impact force.

The present invention will be explained in detail below.

FIG. 2 is an explanatory diagram of the principle of the drive mechanism for rotating the handle according to the present invention.

In FIG. 2, the hammer 6 is being accelerated to the left by the spring 7.

At this time, the frame 8 receives the inertia force necessary for accelerating the hammer 6 in the right direction, but this force is supported by the frictional force between the frame 8 and the floor 9, so the frame 8 cannot move in this state. do not have.

When the hammer 6 accelerated by the spring 7 collides with the frame 8, the frame 8 begins to move to the left due to this impact force.
It gradually slows down due to friction with the floor 9 and finally comes to a stop.

Next, the hammer 6 is moved to the right again against the spring 7 by the rotating cam 10.

As the rotation of the cam 10 progresses and the cam 10 and pin 11 are separated, the hammer 6 begins to be accelerated to the left by the spring 7 again.

By repeating this process, the frame 8, which has a frictional force between it and the floor 9, can be moved without applying any force from the outside.
It can be moved intermittently to the left.

The principle diagram of converting this linear reciprocating motion into rotational motion is shown in the third diagram.
As shown in the figure.

In this principle diagram, the hammer 6 shown in FIG. The portion of the frame 8 of FIG. 2 where the hammer 6 collides with the spring 15 of FIG. 3 corresponds to the hit element 16 of FIG.

Further, the frame 8 in FIG. 3 is fixed to a valve handle (not shown) at its lower part and moves together with the valve handle, and the frictional force between the frame 8 and the floor 9 in FIG. In the principle diagram of FIG. 3, corresponds to the friction torque of the valve stem when the valve handle (not shown) moves integrally with the frame 8.

In the system shown in FIG. 2, the hammer 6 is reciprocated by the cam 10 and hits the frame 8 intermittently, but in the system shown in FIG. 3, the hammer 14 is rotated by the motor 12 and is struck every half rotation. Hit child 16.

FIG. 4 is a top view of the device shown in FIG. 3, showing the operating state of the arm 13 and hammer 14.

A is the moment when the hammer 14 hits the hit child 16, and the frame 8 rotates in the direction of the hit, as in the case of FIG.

When the shaft of the motor 12 is further rotated, the arm 13 is bent backward as shown in b, and the hammer 14 is bent backwards as shown in b.
More detached.

After the arm 13 and hammer 14 are detached, they are accelerated by the spring 15 as shown in c and d, and then make another half turn to strike the hit child 16 as shown in a.

In this way, the hit element 16, as well as the frame 8 to which it is fixed and the valve handle (not shown) fixed to the lower part of the frame 8, rotate in the circumferential direction by the impact force every half rotation of the hammer. I will do it.

In addition, the reaction torque applied to the motor 12 shaft when the hammer 14 is detached from the hit element 16 in b of FIG. 4, and c and d.
The inertial torque required to accelerate the hammer 14 in is applied to the motor 12.

In this device, the motor 12 is fixed to the frame 8 by the upper frame 17, similar to the motor for driving the cam 10 in FIG. The force is transmitted to the handle and tries to rotate the valve handle in the opposite direction, but as in the case of Fig. 2, this is supported by the frictional force acting on the valve stem, and in the states shown in Fig. 4, c, and d. The frame 8 and the valve handle fixed thereto do not rotate.

In summary, when the device shown in FIG. 3 is placed on the valve handle, the lower surface of the frame 8 and the valve handle are fixed, and the motor 12 is rotated, the hammer 14 will strike the hit element 16 every half rotation. This will cause the frame 8 or the valve handle to rotate in the direction of rotation of the hammer.

An embodiment embodying the above principle is shown in FIG. 5, and details of a fixing device for the frame 8 and the valve handle 1 are shown in FIG.

In this embodiment, the threaded rod 18 is rotated by a motor 19,
The slider 20 fitted with the threaded rod 18 is moved toward the center of the frame 8, which is a cylindrical housing, and the hook 22, which is connected to the slider 20 by the toggle link 21, is also moved toward the center of the frame 8. move it to

This hook 22 has four holes cut radially on the bottom surface of the frame 8.
They fit into the grooves of the book, allowing them to move in the radial direction of the frame 8.

A mechanism for fixing the valve handle 1 to the lower surface of the frame 8 using these four hooks 22 will be explained using FIG. 6.

The slider 20 rides on the frame 8 and can slide in the radial direction using a threaded rod 18. Two springs 23 between the slider 20 and the U-shaped hook 22 cause the upper end of the hook 22 to It is always pulled toward the slider 20, that is, downward.

Therefore, the lower end portion of the hook 22 largely protrudes downward from the radial groove cut in the frame 8.

In this state, when the slider 20 moves toward the center of the frame 8 (towards the front in FIG. 6) by the rotation of the threaded rod 18,
The bent part of the lower end of the hook 22 is located outside the valve handle 1 (the sixth
(on the other side of the diagram).

If the threaded rod 18 is still rotated to move the slider 20 toward the front, the hook 22 will collide with the valve handle 1 and will no longer be able to move toward the front, causing the toggle link 21 to move forward.
The upper end of will be drawn to the other side of Figure 6.

Along with this, the toggle link 21, which had been tilted until then, stands up against the spring 23, and the hook 22 is thereby pulled upward.

Therefore, the valve handle 1 is tightened and fixed between the bent portion of the lower end of the hook 22 and the frame 8.

When opening the valve handle 1, by rotating the threaded rod 18 in the opposite direction, the hook 22 first goes down, and then moves to the other side in FIG.
This means that handle 1 will come off.

By attaching four such valve handle gripping mechanisms to the lower surface of the frame 8 of the device as shown in FIG. 5, the device can be easily attached to and removed from the valve handle 1.

Specifically, the device can be fixed to the valve handle 1 by simply placing it on the valve handle 1 and rotating the motor 19, and can be removed from the valve handle 1 by simply rotating the motor 19 in the opposite direction. .

The upper half of the device, which applies an impact force in the rotational direction intermittently to the valve handle 1, has almost the same structure as the principle diagram shown in FIG.

That is, the flange 26 of the motor 12 fits into a groove cut in the upper surface of the upper frame 17 in FIG.
The upper frame 17 and the motor 12 are able to rotate relative to each other about the axis No. 2.

This rotation is not unlimited, but is limited by a groove 28 cut a certain length in the cylindrical direction into which a pin 27 attached to the upper surface of the flange 26 is fitted.

By allowing the relative movement between the motor 12 and the upper frame 17, the hammer 14, which is a striking element, is moved to the upper frame 17.
It is possible to absorb the impact force applied to the shaft of the motor 12 when the hit element 16, which is a protrusion formed therein, is struck.

A lead wire 29 of the motor 12 is rotatably drawn out through a slip ring 24 to prevent twisting.

Further, a torque limiter 25 is attached to the shaft of the motor 12, so that the motor 12 idles when the valve is fully open and fully closed.

According to the actual measurement data, the tightening torque T when closing the valve is
c and the torque To when opening this are approximately:
To = 0.6 to 0.8 Tc, and even if the valve is tightened until the torque limiter 25 is activated when the valve is closed, the valve can be opened with a lower torque than this when the valve is opened. A situation in which the torque limiter 25 operates and the motor 12 idles does not occur.

As described above, when rotating the valve handle 1 using this device,
When the device is placed on the valve handle 1 and the motor 19 is switched on, the valve handle 1 and the device are fixed, and when the motor 12 is then switched on, the valve handle 1 can be rotated.

The direction of rotation of the valve handle 1 is controlled by electrically changing the direction of rotation of the motor 12.

When the torque limiter 25 is activated and the valve handle 1 stops rotating, the motor 12 is switched off and the motor 19 is turned off.
The valve handle 1 and the device can be separated by rotating in the opposite direction.

That is, a manual valve can be temporarily converted into an automatic valve by simply operating a remote switch, which is a feature of this device.

FIG. 7 shows a principle diagram of another embodiment of the present invention.
What is different from the principle diagram of the embodiment shown in the figure is that the hammer 14 rotated by the motor 12 is supported by an arm 13 and a spring 15 that can swing around the axis of the motor 12, but one end is fixed to the axis of the motor 12. The point is that the flat spring 30 is used.

The operating principle is exactly the same as the embodiment shown in FIG. 3, but it has the advantage of fewer parts compared to the embodiment shown in FIG.

Further, the hammer 14 and the arm 13 or plate spring 30 that support it do not necessarily have to be two sets as shown in FIGS. Since the number of strikes of the hammer 14 per revolution increases, the speed of opening and closing the valve also increases.

In one embodiment of the valve handle rotation device shown in FIG.
The weight of each hammer 14 is 1 kg, and the motor output is 15
When set to 0W, the valve attached to about 2 inches of piping will
It can be driven at a speed of about 2°rpm, which is the same as a conventional valve opening/closing machine.

Also, the total weight is about 15 kg.

As is clear from the above description, according to the present invention, it is possible to provide a valve handle rotation device that is small and lightweight and can be easily attached to and detached from a manual valve, so that it is possible to temporarily convert a manual valve into a remote-controlled valve. become.

Therefore, the present invention has the effect of saving labor when repairing, testing, and restoring a plant by operating a large number of manual valves simultaneously, and reducing the danger to operators due to manual valve operation when the plant is in a dangerous state. 0

[Brief explanation of drawings]

Figure 1 is a route map showing the installation means of a conventional valve opening/closing machine;
Figures 3 and 4 are route diagrams showing the operating principle of the present invention, Figure 5 is a sectional view showing one embodiment of the present invention, and Figure 6 shows a part of the embodiment of Figure 5. The route map and FIG. 7 are operation principle diagrams regarding another embodiment of the present invention. 1...Handle, 3...Valve box, 4...
... Valve stem, 8 ... Frame, 12 ...
...Motor, 13...Arm, 14...
・Hammer, 15... Spring, 16... Hit child, 17... Upper frame, 18...
Threaded rod, 19...Motor, 20...Slider, 21...Toggle link, 22...
...Hook, 25...Torque limiter, 26.
...Flange, 27...Pin, 28...
...Groove, 30...Plate spring.

Claims (1)

[Claims] 1. A cylindrical casing fixed to a handle, a drive device attached to the casing, a rotating shaft coaxial with the axis of the handle rotated by the drive device, a protrusion formed inside the casing, A handle rotation device comprising: a striker for striking the protrusion that is movably connected to the rotation shaft in the radial direction of the housing.