JP3054540B2 - Rotary valve drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a rotary valve which opens and closes a flow passage by rotating a valve body, and more particularly to a drive device selection according to a drive force and a drive system required for operating the valve. In addition, the present invention relates to a rotary valve driving device capable of selecting an operation direction.

[0002]

2. Description of the Related Art Conventionally, a rotary valve, such as a butterfly valve or a ball valve, which rotates a valve body to open and close a flow path and adjust a flow rate is known, and is widely used for controlling various fluids. ing. Driving of the valve element in such a rotary valve is performed by extending a valve stem that rotationally drives the valve element out of the valve body, and connecting the valve stem to a drive shaft of a driving device attached to the outer surface of the valve body via a worm gear mechanism. The most common method is to manually rotate the valve by rotating a handle fixed to the shaft.

[0003] A rotary valve having such a manually operated drive device is provided in a narrow space such as an engine room of a ship or a machine room of a factory.
In addition, when installing in a place where various devices are playing or when installing in a plant where many valves are arranged in many pipelines, work may be performed depending on the position of the valves and the direction of the operation handle. Large differences in efficiency, safety, and certainty come into play.

[0004] For example, the pipeline as shown in FIG. 8 A
If the device (M ₁ ) needs to be placed near the rotary valve (V ₁ ) after the rotary valve (V ₁ ) is placed on (PL ₁ ), it is difficult to rotate the handle (H ₁ ). Becomes In such a case, conventionally, the rotary valve (V ₁ ) is removed from the pipeline (PL ₁ ) together with the driving device (AC ₁ ) and rotated 180 ° so that the position and the direction of the operation handle (H ₁ ) are reversed. It was attached to. However, in the case of a rotary valve in which the flow direction in the valve is limited to one direction, such as an eccentric butterfly valve, it is not possible to mount the valve by rotating it by 180 °. In this case, as shown in FIG. 8 B ~ D, the drive unit (A
This problem can be solved by removing only C ₁ ) and turning it 90 ° or 180 ° to attach it. However, a rotatable connecting mechanism at the connecting portion between the valve stem and the drive shaft of the drive device via the worm gear mechanism is used. There is no conventional device which can be mounted by turning only the driving device (AC) because it is necessary.
After the rotary valve is installed in the pipeline, the operating conditions such as the pressure, temperature, and properties of the fluid are changed, and it is necessary to change the driving device accordingly. It is extremely difficult to change the driving device because the mounting surface has a one-to-one relationship. Furthermore, when a large number of rotary valves are provided in a large number of pipelines, it is not possible to determine the open / close state of each valve unless the valve is located near each valve. Thus, the work efficiency was poor and was not preferable from the viewpoint of work safety.

Further, as described above, since the valve body and the driving device are usually combined in a one-to-one relationship, the type of the driving device must be prepared for the type of the rotary valve.
The design, fabrication, processing, assembly, and inventory of a number of drives required considerable economics.

[0006]

SUMMARY OF THE INVENTION The present invention makes it possible to turn and mount only a driving device without removing a rotary valve from a pipeline, and to perform a manual operation in a narrow place where a large number of devices are playing. In addition to being able to perform well and safely, the drive unit can be easily changed in response to changes in use conditions, and the open / closed state of the attached valve can be visually recognized from a distance, and sharing of the drive unit has been achieved. To be able to do so.

[0007]

Means for Solving the Problems To solve the above problems, a means adopted by the present invention is to interpose a cover between a mounting surface of a valve body of a rotary valve and a manual driving device, The mounting surface on the valve body side has a shape and dimensions that are aligned with the mounting surface of the valve body and the mounting surface on the drive device side, respectively, and is interchangeable.
The worm wheel and the connection sleeve of the drive unit are connected by splines or serrations that can be uncoupled by moving the worm wheel and the connection sleeve in the axial direction and moving in the axial direction, and the connection sleeve and the valve stem are connected by a key.

[0008]

According to the present invention, the following functions and effects can be obtained.

1. By adjusting the inner and outer diameters of the worm gear shaft hole of the drive unit and the valve stem connecting sleeve by a shaft joint method such as serration or spline, the position and direction of the operation handle of the drive unit can be adjusted from the pipeline at the site. Without removing the entire rotary valve, only the drive unit can be removed and changed in four directions.

[0010] 2. It is possible to select a plurality of driving devices corresponding to the mounting surface of the rotary valve. That is, there are a plurality of covers and casings corresponding to the mounting surface, which can be changed according to the fluid conditions.

3. The valve stem of the rotary valve and the valve stem connecting sleeve are inserted by an implanted key, and if the dimensions and shape of the shaft coupling method such as serration or spline of the outer diameter portion of the valve stem connecting sleeve match, Regardless of the present driving device, it is possible to support other driving devices.

4. The components constituting the driving device, that is, the cover, the casing, the worm gear, and the like are all used and shared by a plurality of driving devices, and can meet the quality, price, and delivery date.

5. By increasing the size of the remote indicator for valve opening or attaching a separate coloring cap, the efficiency and safety of checking work at the site are improved.

6. The casing top and the indicator are configured so that the remote indicator of the valve opening can be attached.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. Although the illustrated embodiment shows an example in which the present invention is applied to a butterfly valve, it is needless to say that the present invention is not limited to a butterfly valve, but a ball valve or a rotary valve that rotates other valve bodies to control a flow path. The same can be applied.

In the drawing, (1) shows a valve body of a butterfly valve, which is provided with a disc-shaped valve body (2) through which a cylindrical flow path is penetrated and which can open and close the flow path. One valve stem (3) that axially supports the valve element (2) is a valve stem that extends in the radial direction of the valve body (1).
The tip extends outward through (4). Valve stem
At the outer end of (4), a flat plate-shaped drive device mounting plate (5) is integrally formed, and the drive device (7) is mounted on a mounting surface (6) of the mounting plate (5) via a cover (8). Attached. Cover (8)
Is formed so that its lower surface is aligned with the mounting surface (6), and is fixed to the mounting plate (5) with bolts. cover
The casing (9) of the driving device (7) is detachably fixed to (8).

A worm wheel is provided in the casing (9).
(10) is rotatably supported, and the outer end of the valve stem (3) is connected to the worm wheel (10) via a connecting sleeve (11). The connecting sleeve (11) and the worm wheel (10) are connected in the rotational direction by splines (12) or serrations,
They are connected by freely moving in the axial direction. Therefore, the worm wheel (10) can be disconnected from the connection sleeve (11) by moving in the axial direction. At the center of the connecting sleeve (11), a valve stem (3) is connected integrally with a key (13) so as to rotate. Worm wheel (10) is casing
Rotation in a range of 90 ° is permitted by a stopper pin (14) screwed into and out of (9). The worm (15) meshes with the worm wheel (10), and the worm (1
A worm shaft (16) supporting 5) extends out of the casing (9), and a handle (17) is attached to the outer end. The top of the splines or serrations of the connecting sleeve (11) is formed to coincide with the horizontal and vertical lines of the connecting sleeve.

An opening indicator (18) fixed to the worm wheel (10) is provided on the upper surface of the casing (9) with bolts (19).
It is fixed with. The opening indicator (18) has a plate-shaped indicator (20) extending in a direction coinciding with the diameter direction of the valve body (2) having a sufficient size that can be visually recognized even from a distance. The top of
If necessary, cover with a colored cap colored red, yellow, or the like. Worm wheel (10) is pivot sleeve (21)
It is supported by the casing (9) via (22), and is further provided with a waterproof and drip-proof structure by an O-ring (23) arranged at the end thereof.

FIG. 4 shows a case where a remote indicator (24) is mounted on the upper surface of the casing (9) so that the position of opening or closing the valve can be confirmed at a remote location. Remote indicator
(24) is a mounting plate (25) fixed on the upper surface of the casing (9)
A limit switch (26) arranged at the valve opening position and the valve closing position, and a lever (27) fixed to the valve opening instruction piece (20) and capable of operating the limit switch (26). Means for mounting the mounting plate (25), for example, a boss (28) is formed on the upper surface of the casing (9).

As described above, the connecting sleeve (11) and the worm wheel (10) are relatively displaced and slid in the axial direction, thereby releasing the connection between them and the casing (9) of the driving device (7). Can be removed. Thus, as shown in FIG. 7, when it is necessary to convert the capability of the driving device (7) to a higher one, the lower driving device (7A) is replaced with the higher driving device (7B). At this time, the casings (9A) and (9B) of the lower drive unit (7A) and the upper drive unit (7B) have different shapes and dimensions of the mounting surface with the cover.
Since the shape and dimensions of the mounting surface in (5) are the same,
(8A ₁ ) can be combined with a higher-order drive device (7B) only by changing the cover (8A ₂ ) having the same dimensions and matching the mounting surface of the casing (9). Similarly, when combining with a higher-order driving device (7C, 7D), the cover may be replaced with (8
B ₁ , 8B ₂ , 8C ₁ , 8C ₂ ) can be achieved only by changing each of them.

The worm wheel (10) and the connecting sleeve
By disengaging the connection of (11) and turning the casing (9) 90 ° or 180 ° with respect to the worm wheel (10), it is easy to change the operating direction of the handle as shown in FIG. It becomes possible. That is, the change in the operation direction of the drive device can be achieved by changing only the drive device without removing the entire valve from the pipeline.

[Brief description of the drawings]

FIG. 1 is an overall perspective view.

FIG. 2 is a cross-sectional view of a driving device.

FIG. 3 is a longitudinal sectional view of a driving device.

FIG. 4 is an overall perspective view of a modification.

FIG. 5 is a plan view of a connecting sleeve.

FIG. 6 is a plan view of a connection portion of the worm wheel.

FIG. 7 shows various combinations of a casing and a cover.

FIG. 8 is a diagram showing various mounting examples of a drive device and a pipeline.

[Explanation of symbols]

 (1) Valve body (2) Valve body (3) Valve stem (4) Valve stem (5) Mounting plate (6) Mounting surface (7) Drive unit (8) Cover (9) Casing (10) Worm wheel ( 11) Connecting sleeve (12) Spline (13) Key (14) Stopper pin (15) Worm (16) Worm shaft (17) Handle (18) Position indicator (19) Bolt (20) Indicator piece (21) Bearing Sleeve (22) Bearing sleeve (23) O-ring (24) Remote indicator (25) Mounting plate (26) Limit switch (27) Lever (28) Boss

Claims (1)

(57) [Claims] 1. A cover is interposed between a mounting surface of a valve body of a rotary valve and a manual driving device, and a mounting surface of the cover on a valve body side is attached to a mounting plate of the valve body and a mounting device on a driving device side. The surface has a shape and dimensions aligned with the mounting surface of the casing of the drive unit, and is interchangeable. The worm wheel and the connection sleeve of the drive unit are integrated with each other in the direction of rotation so that the connection can be made by moving in the axial direction. A driving device for a rotary valve, wherein the driving device is connected by a releasable spline or serration, and the connection sleeve and the valve stem are connected by a key.