JP2000055236A - Biaxial rotational device by one operating shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biaxial rotational device by one operating shaft capable of rotating two axes automatically in accordance with a proper operating order only by simply specifying a rotational direction of the one operating shaft without considering the operating order. SOLUTION: When one operating shaft 40 is rotated in the valve opening direction R1, an auxiliary valve element is opened by rotating an auxiliary shaft side clutch 32 and a shaft 14 in the normal direction by 90 degrees. Thereafter, a main shaft side clutch 31 and an upper valve stem 4 are rotated in the normal direction by 90 degrees following rotation of the auxiliary shaft side clutch 32 and a main valve element is opened. Additionally, when the operating shaft 40 is rotated in the valve closing direction R2, an arm 37 is rotated by 90 degrees in the opposite direction and closes the main valve element by following autorotation in the normal direction and revolution in the opposite direction of a planetary gear 35. Additionally, the auxiliary shaft side clutch 32 and the shaft 14 are rotated by 90 degrees in the opposite direction and close the auxiliary valve element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-shaft rotary device having one operation shaft suitable for an opening / closing device for a butterfly valve with a built-in auxiliary valve.

[0002]

2. Description of the Related Art As shown in FIGS. 15 to 17, a butterfly valve with a built-in sub-valve comprises a valve box 1, a main valve element 2 housed in the valve box 1 so as to be openable and closable, and a main valve element 2. A sub-valve element 3 is provided so as to be openable and closable. An upper valve rod 4 and a lower valve rod 5 are fixed to the main valve body 2. The upper valve stem 4 is a cylindrical member provided with a through hole 6 in the direction of the axis C, and is rotatably and air-tightly supported around the axis C by the upper shaft support 7 of the valve box 1 so as to be above the upper shaft support 7. It is protruding. Lower valve stem 5 is valve box 1
The main valve body 2 is rotatably and air-tightly supported around an axis C by a lower shaft support portion 8, and the main valve body 2 is rotated by the rotation of the upper valve stem 4 and the lower valve stem 5 in the forward and reverse directions around the axis C. 1
Open and close the passage.

An upper valve rod 9 and a lower valve rod 10 are fixed to the sub-valve element 3, and the upper valve rod 9 is rotatable about an axis C by an upper shaft support 12 of an auxiliary valve box 11 provided on the main valve element 2. And is airtightly supported and protrudes above the upper shaft support 12. The lower valve stem 10 is rotatably and air-tightly supported around an axis C by a lower shaft support portion 13 of the sub-valve case 11.

A shaft 14 having an upper end protruding above the upper valve rod 4 is inserted through a through hole 6 provided in the upper valve rod 4 of the main valve body 2 in the direction of the axis C so as to be rotatable about the axis C. , This axis 14
And the upper end of the upper valve rod 9 of the sub-valve 3 are connected to each other via a coupling 15 so as to be able to rotate simultaneously.

[0005] A biaxial rotating device 17 is mounted on the upper shaft support 7 of the valve box 1 via a stand 16. The two-axis rotating device 17 uses the two operation shafts 18 and 19 to rotate the main valve body 2.
A first gear case 20 having an axis concentric with the axis C, and a first gear case 20 having an axis concentric with the axis C. A lower end of the first gear case 20 is fixed to the stand 16, and an upper end opening of the first gear case 20 is detachably closed by a cover 22.

The one operating shaft 18 is connected to the upper valve rod 4 of the main valve body 2.
To rotate in the forward and reverse directions around the axis C,
As shown in FIGS. 17 and 18, the second gear case 21
Is rotatably and airtightly supported around an axis C1 by a shaft support portion 23 provided at one end thereof, and protrudes above the shaft support portion 23. The rotation of one operation shaft 18 around the axis C1 is performed by a bevel pinion 24A, It is transmitted to a horizontal worm shaft 25 via a gear train 24 such as a bevel gear 24B, a pinion 24C, a spur gear 24D, and the like.
Is rotated via a worm 26 provided on the worm shaft 25 through a worm wheel 27 having an axis concentric with the axis C.
Is transmitted to The worm wheel 27 is fixed to a wheel boss 28 rotatably supported around the axis C by the first gear case 20 and the cover 22, and a central hole 28 </ b> A of the wheel boss 28 is provided at an upper end of the upper valve rod 4 of the main valve body 2. And are coupled so as to be simultaneously rotatable by, for example, a key (not shown).

The other operating shaft 19 is for rotating the upper valve rod 9 of the sub-valve 3 in the forward and reverse directions about the axis C via the shaft 14 and the coupling 15, as shown in FIG. , Which is rotatably and air-tightly supported around an axis C by a stem cover 29 which detachably closes a center hole 22A of the cover 22 and protrudes above the stem cover 29, and is provided on the other operation shaft 19. The upper end of the shaft 14 is fitted into the blind through-hole 30 in the direction of the axis C, and is coupled to be rotatable simultaneously by, for example, a taper pin (not shown).

In the above construction, the main valve body 2 and the sub-valve element 3 are fully opened from the valve-closing state of the sub-valve built-in type butterfly valve in which the main valve element 2 and the sub-valve element 3 are fully closed. The procedure for obtaining the open state of the butterfly valve will be described.

First, the other operation shaft 19 is rotated in the valve opening direction (for example, counterclockwise on the projection plane). This rotation is transmitted to the upper valve rod 9 of the sub-valve 3 via the shaft 14 and the coupling 15, and simultaneously rotates the upper valve rod 9, the sub-valve 3 and the lower valve rod 10 in the valve opening direction. The sub-valve 3 can be fully opened.

When the differential pressure between the upstream side and the downstream side of the valve box 1 becomes small due to the full opening of the sub-valve element 3, the one operating shaft 1
8 is the valve opening direction (for example, counterclockwise on the projection plane)
Rotate to. This rotation is transmitted to the upper valve stem 4 of the main valve body 2 through a gear train 24 such as a bevel pinion 24A, a bevel gear 24B, a pinion 24C, a spur gear 24D, a worm shaft 25, a worm 26, a worm wheel 27, and a wheel boss 28. By rotating the upper valve stem 4, the main valve stem 2 and the lower valve stem 5 simultaneously in the valve opening direction, the main valve stem 2 can be fully opened.

Next, the main valve body 2 and the sub-valve element 3 are fully closed from the valve-open state of the sub-valve-incorporated type butterfly valve in which the main valve element 2 and the sub-valve element 3 are fully opened. The procedure for obtaining the closed state of the butterfly valve will be described.

First, one operation shaft 18 is rotated in a valve closing direction (for example, clockwise on a projection plane). This rotation is transmitted to the upper valve stem 4 of the main valve body 2 through a gear train 24 such as a bevel pinion 24A, a bevel gear 24B, a pinion 24C, a spur gear 24D, a worm shaft 25, a worm 26, a worm wheel 27, and a wheel boss 28. ,
The upper valve stem 4, the main valve body 2 and the lower valve stem 5 can be simultaneously rotated in the valve closing direction to fully close the main valve body 2.

After the main valve body 2 is fully closed, the passage of fluid from the upstream side to the downstream side of the valve box 1 is greatly restricted, and then the other operation shaft 19 is moved in the valve closing direction (for example, clockwise on the projection plane). Around). This rotation is transmitted to the upper valve rod 9 of the sub-valve 3 via the shaft 14 and the coupling 15, and simultaneously rotates the upper valve rod 9, the sub-valve 3 and the lower valve rod 10 in the valve closing direction, The sub-valve 3 can be fully closed.

As described above, in the butterfly valve with a built-in sub-valve, the operation order of the main valve body 2 and the sub-valve body 3 from the valve closed state to the valve open state is as follows. Opening of the sub-valve body 3 by rotating the other operation shaft 19,. The operation of the main valve 2 and the sub-valve 3 from the valve open state to the valve closed state is performed by opening the valve of the main valve body 2 by rotating one of the operation shafts 18. The valve closing of the main valve body 2 by the rotation operation of one operation shaft 18,. This is performed by closing the valve of the sub-valve body 3 by rotating the other operation shaft 19.

[0015]

For this reason, in a conventional two-shaft rotating device having two operating shafts, two operating shafts are specified each time the main valve and the sub-valve are opened and closed. Must be rotated in the valve opening or valve closing direction in the order described, which has the disadvantage of cumbersome operation, and improper operation sequence significantly increases the operating force at the time of valve opening and valve closing, It has a drawback that smooth opening and closing of the valve are hindered.

Accordingly, the present invention provides a method of automatically rotating two axes based on an appropriate operation order simply by specifying the rotation direction of one operation axis without considering the operation order. It is an object of the present invention to provide a two-axis rotating device using one operation shaft, which can facilitate the operation and can avoid an erroneous operation sequence.

[0017]

In order to achieve the above object, a two-axis rotating device with one operating shaft according to the present invention is provided.
A main shaft and a sub-shaft inserted into the main shaft along the main shaft are rotated in a specified order in the normal and reverse directions around the main shaft by rotation of one operation shaft. A shaft rotating device, a main shaft side clutch provided so as to be able to rotate simultaneously with the main shaft, and a sub shaft side clutch provided so as to be able to rotate simultaneously with the sub shaft in opposition to the main shaft side clutch,
A gear and a worm wheel, which are provided so as to be able to rotate simultaneously with the counter shaft side clutch, and a worm that is rotatably supported with an axis crossing the axis of the main shaft and the counter shaft, and that meshes with the worm wheel. One operating shaft provided, an arm provided on the main shaft side clutch and extending outward in the radial direction of the main shaft, a planetary gear meshing with the gear, and rotatably supported at a tip end of the arm; The main shaft-side clutch and the sub-shaft-side clutch are provided with arc-shaped fixed teeth in which a planetary gear is inscribed and meshable with the planetary gear, and the main shaft-side clutch and the sub-shaft-side clutch follow the rotation of the one operation shaft in a first direction. Positive direction 90 of the first half of
In the latter rotation, the main shaft side clutch is disconnected, and in the latter half 90 degree rotation in the forward direction, the main shaft side clutch is rotated 90 degrees in the forward direction by interfering with the main shaft side clutch, and the rotation of the one operation shaft in the second direction is performed. Reverse direction 180 of the following secondary shaft side clutch
The planetary gear is configured to be disconnected from the main shaft side clutch during the rotation at an angle of 90 degrees, and the planetary gear idles in the reverse direction when the front half of the gear rotates by 90 degrees in the positive direction, and the planetary gear rotates with the 90 degree rotation of the main shaft side clutch in the normal direction. Following the 90-degree rotation of the arm in the forward direction, the gear meshes with the arc-shaped fixed teeth and revolves in the forward direction while rotating in the reverse direction, and rotates 180 degrees in the reverse direction simultaneously with the sub-shaft side clutch. Along with the forward rotation of the planetary gear following the first half rotation and the reverse rotation caused by meshing with the arc-shaped fixed teeth during the forward rotation, the main shaft side clutch is moved in the reverse direction via the arm. It is characterized in that it is configured to rotate by 90 degrees.

According to the present invention, by rotating one operation shaft in the first direction, the worm, the gear, the sub-shaft side clutch and the sub-shaft can be simultaneously rotated 90 degrees in the forward direction. In this case, the main shaft side clutch and the main shaft are stopped. Further, since the planetary gears are not meshed with the arc-shaped fixed teeth, they rotate in the opposite direction (spin).

By continuing rotation of one operating shaft in the first direction, the gear, the countershaft-side clutch and the countershaft can be further rotated 90 degrees in the forward direction. in this case,
The main shaft side clutch and the main shaft rotate 90 degrees in the forward direction.
The planetary gear meshes with the arc-shaped fixed teeth following the 90-degree rotation of the arm in the forward direction, and revolves in the forward direction while rotating in the reverse direction.

In the above state, one operation shaft is
By rotating the worm, the worm, the gear, the countershaft-side clutch, and the countershaft can be simultaneously rotated in the opposite direction by 90 degrees. In this case, the planetary gear rotates in the forward direction, meshes with the fixed teeth in an arc shape, and revolves in the opposite direction. For this reason,
The arm, the main shaft side clutch and the main shaft rotate 90 degrees in the reverse direction and return to the original position. Further, the engagement between the planetary gear and the arc-shaped fixed teeth is released.

By continuing the rotation of one operating shaft in the second direction, the gear, the countershaft-side clutch and the countershaft are further rotated 90 degrees in the opposite direction to return to the original position. In this case, since the sub shaft side clutch does not interfere with the main shaft side clutch, the main shaft side clutch and the main shaft are stopped.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, in which the present invention is applied to an opening / closing device for a butterfly valve with a built-in sub-valve in the same manner as in the prior art. Therefore, the structures of the valve box 1, the main valve body 2, the sub-valve body 3, the upper valve rod 9, the lower valve rods 5, 10 and the like are the same as those of the conventional example. The same or corresponding parts as in the conventional example are denoted by the same reference numerals.

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
FIG. 4 is a sectional view taken along line DD of FIG. 2. In these figures, the two-axis rotating device 17 is
1, a countershaft-side clutch 32, a gear 33, and a sector worm wheel 34, which are opposed to each other on the upper side so as to be meshable with the main shaft-side clutch 31 and constitute a meshing clutch.
A casing 41 having a planetary gear 35, an arc-shaped fixed tooth 36, and an axis intersecting the axis of the upper valve stem 4 and the shaft 14.
And rotatably supported by the worm 40A
And a single operation shaft 40 provided with.

The upper end of the upper valve rod (main shaft) 4 of the main valve body 2 is fitted to the main shaft side clutch 31 and mutually coupled via a key so as to be able to rotate simultaneously. The upper end of the shaft (sub shaft) 14 is fitted to the sub shaft clutch 32 so as to be rotatable at the same time via a key, and a sector worm wheel 34 is connected to the sub shaft clutch 32 so as to be rotatable at the same time. ing. The sector worm wheel 34 is mounted on the worm 4
It is in mesh with 0A.

The main shaft side clutch 31 is provided with an arm 37 extending horizontally toward the outside in the radial direction, and a rotating shaft 38 having a vertical axis at the tip of the arm 37.
Is rotatably erected, and the upper end of the rotating shaft 38 is fitted to the planetary gear 35 and connected so as to be simultaneously rotatable via a key, so that the planetary gear 35 and the gear 33 mesh with each other. I have. In addition, a shaft having a vertical axis may be non-rotatably provided at the tip of the arm 37, and the planetary gear 35 may be rotatably and irremovably attached to the upper end of this shaft to mesh with the gear 33. .

The arc-shaped fixed teeth 36 are provided on the inner surface of the upright wall of the casing 41 so that the planetary gear 35 can be inscribed.

As shown in FIG. 5, a pair of teeth 31A and 31B which are displaced by 180 degrees in the circumferential direction and project upward from the annular surface of the upper end of the main shaft side clutch 31 are shown in FIG. As described above, a pair of teeth 32A and 32B are provided on the lower annular surface of the sub-shaft side clutch 32 so as to be displaced 180 degrees in the circumferential direction and project downward. Teeth 31A, 3 of main shaft side clutch 31
1B and the teeth 32A and 32B of the sub-shaft side clutch 32 have the relative relationship shown in FIG. 7 in the valve-closed state of the sub-valve-incorporated butterfly valve in which the main valve body 2 and the sub-valve body 3 are fully closed. Correspondingly, the main shaft side clutch 31 and the sub shaft side clutch 32 constitute a meshing clutch.

A procedure for fully opening the main valve body 2 and the sub-valve body 3 from the valve-closed state of the butterfly valve with a built-in sub-valve in which the main valve body 2 and the sub-valve body 3 are fully closed will be described. .

A sector worm wheel 34 and a planetary gear 35 are located at positions indicated by solid lines in FIG. 1 and have teeth 31A and 31B of the main shaft side clutch 31 and teeth 32A of the sub shaft side clutch 32 in a relative relationship shown in FIG. , 32B are engaged with each other and, as shown in FIG. 8, in a state where the main valve body 2 and the sub-valve body 3 are fully closed, the first self-locking function is generated by the engagement of the sector worm wheel 34 with the worm 40A. The sub-shaft side clutch 32 and the sub-valve element 3 do not swing around the forward axis or the reverse axis due to the load of the fluid. 7, the teeth 31A, 31B of the main shaft side clutch 31 and the teeth 32A, 32 of the sub shaft side clutch 32 are connected.
B engages with a second self-locking function caused by the engagement of B with a third self-locking function caused by the planetary gear 35 meshing with the non-rotatable gear 33 and disabling the arm 37 about the forward axis. This prevents the main shaft-side clutch 31 from rotating in the forward direction as indicated by the solid line arrow, and prevents the main shaft-side clutch 31 from rotating in the reverse direction indicated by the broken line arrow by the third self-locking function. 31 and the main valve body 2 do not swing around the forward axis or around the reverse axis due to the load of the fluid.

In this state, when one operating shaft 40 shown in FIGS. 1 and 2 is rotated in the valve opening direction R1, the worm 40A
Meshing with the sector worm wheel 34, the sector worm wheel 34, the gear 33, the countershaft side clutch 3
The shaft 2 and the shaft 14 are simultaneously rotated 90 degrees in the positive direction indicated by the solid arrow. Thereby, the teeth 32 of the sub-shaft side clutch 32
A and 32B are rotated 90 degrees in the forward direction to the position of FIG. 9, and only the sub-valve 3 opens as shown in FIG. In this case, since the main shaft side clutch 31 and the upper valve rod 4 are stopped, the main valve body 2 is held in the valve closed state. Also,
Since the planetary gear 35 shown in FIG. 1 does not mesh with the arc-shaped fixed teeth 36, the planetary gear 35 idles (rotates) at the position shown by the solid line in the reverse direction shown by the dashed arrow.

When the rotation of one operating shaft 40 in the valve opening direction R1 is continued in a state where only the sub-valve element 3 shown in FIG. 10 is open, the sector worm wheel 34, the gear 3
3. The countershaft-side clutch 32 and the shaft 14 simultaneously rotate further 90 degrees in the positive direction indicated by the solid arrow, and the sector worm wheel 34 reaches the position indicated by the two-dot chain line in FIG.
As a result, the sub shaft side clutch 32 rotates 90 degrees in the forward direction, and the teeth 32A and 32B move 9 degrees in the forward direction to the position in FIG.
Rotate 0 degrees. Along with this rotational movement, the teeth 31A and 31B of the main shaft side clutch 31 rotate 90 degrees in the forward direction from the position in FIG. 9 to the position in FIG.
1 is rotated 90 degrees in the forward direction. Therefore, as shown in FIG. 12, the auxiliary valve element 3 rotates 90 degrees in the forward direction,
The main valve 2 opens. In this case, the first self-locking function prevents the sub-shaft side clutch 32 and the sub-valve body 3 from swinging around the forward axis or the reverse axis due to the load of the fluid. In cooperation with the self-locking function and the third self-locking function, the rotation of the main shaft side clutch 31 indicated by the solid arrow is prevented from rotating in the forward direction, and the third self-locking function is used to prevent the main shaft side clutch 31 indicated by the broken line arrow. Since the rotation of the main shaft 31 in the reverse direction is prevented, the main shaft side clutch 31 and the main valve body 2 do not swing around the forward shaft or the reverse shaft due to the load of the fluid.

When the main shaft side clutch 31 is rotated by 90 degrees in the forward direction, the arm 37 in FIG. 4 is rotated by 90 degrees in the forward direction indicated by the solid line arrow.
The planetary gear 35 meshes with the arc-shaped fixed teeth 36, revolves in the positive direction shown by the solid arrow while rotating in the reverse direction shown by the broken arrow, and reaches the position shown by the two-dot chain line.

In the state described above, 1 in FIGS.
By rotating the two operating shafts 40 in the valve closing direction R2 and engaging the worm 40A with the sector worm wheel 34, the sector worm wheel 34, the gear 33, the sub-shaft side clutch 32 and the shaft 14 are simultaneously rotated in the opposite directions indicated by broken arrows. 90 degrees in the direction, the teeth 32A of the sub-shaft side clutch 32,
32B reaches the position in FIG. 9 from the position in FIG. The planetary gear 35 at the position shown by the two-dot chain line in FIG.
It rotates in the forward direction shown by the solid arrow and meshes with the fixed teeth 36 of the arc shape, and revolves in the reverse direction shown by the broken arrow. For this reason,
The arm 37, the main shaft side clutch 31 and the upper valve stem 4 rotate 90 degrees in the opposite direction indicated by the broken arrow, and the main shaft side clutch 3
The first teeth 31A and 31B return to the original position in FIG. 9 from the position in FIG. 11 and close the main valve body 2 as shown in FIG. The planetary gear 35 returns to the position shown by the solid line in FIG. 1 and the engagement with the arc-shaped fixed teeth 36 is released.

By continuing to rotate the one operating shaft 40 in the valve closing direction R2 from this state, the sector worm wheel 34, the gear 33, the sub-shaft side clutch 32 and the shaft 1
4 further rotates 90 degrees in the reverse direction indicated by the broken arrow, the teeth 32A and 32B of the sub shaft side clutch 32 return to the original position of FIG. 7 from the position of FIG. 9, and the sub valve body 3 of FIG. Valve is closed. In this case, the teeth 32A, 3A of the sub shaft side clutch 32
Since 2B does not interfere with the teeth 31A and 31B of the main shaft side clutch 31, the main shaft side clutch 31 and the upper valve stem 4 are stopped.

As described above, the rotation direction of one operating shaft 40 is specified simply without considering the opening / closing operation sequence of the main valve body 2 and the sub-valve body 3, and the main valve body 2 and the sub-valve body 3 are automatically determined based on the opening / closing operation sequence. By rotating the two axes of the upper valve stem 9 of the sub-valve element 3 via the upper valve stem 4 and the shaft 14 of the valve element 2, the main valve element 2 and the sub-valve element 3 can be opened and closed in a specified order. Therefore, the main valve body 2 and the sub-valve body 3 are arranged like a conventional two-shaft rotating device having two operation shafts.
Each time the valve is opened and closed, the complicated operation of rotating the two operation axes in the specified direction in the valve opening or valve closing direction is not required, and the operation can be easily performed. No errors occur.

In the above-described embodiment, a pair of teeth 31A and 31B are displaced in the circumferential direction by 180 degrees on the upper annular surface of the main shaft side clutch 31 so as to protrude upward. The description has been made using a meshing clutch having a structure in which a pair of teeth 32A and 32B are projected downward on the annular surface by being displaced by 180 degrees in the circumferential direction.
A meshing clutch having a structure in which one tooth 31A protrudes upward from the upper annular surface and one tooth 32A protrudes downward from the lower annular surface of the sub-shaft side clutch 32 may be used.

As shown in FIGS. 13 and 14,
A main shaft side clutch 31 provided with a concave portion 42 having an inner angle θ1 set to 135 degrees on the upper annular surface, and one tooth 32A inserted into the concave portion 42 having an internal angle θ2 set to 45 degrees is provided on the lower annular surface. A dog clutch constituted by the sub-shaft side clutch 32 may be used.

Further, in the above-described embodiment, the two-axis rotating device with one operation shaft according to the present invention is applied to the opening / closing device of the butterfly valve with a built-in sub-valve. The present invention is not limited to only the opening and closing device for the butterfly valve, but can be applied to a device for rotating two members rotating around an axis in a specified order in a forward direction and a reverse direction.

Although the sector worm wheel 34 and the gear 33 are separately mounted on the shaft 14, the sector worm wheel 34 and the gear 33 may be integrally formed and mounted on the shaft 14.

[0040]

As described above, according to the present invention, the rotation direction of one operation shaft is specified only by specifying the rotation direction of one operation shaft without considering the opening / closing operation sequence of the main shaft and the sub shaft. The two axes can be rotated based on a simple opening / closing operation sequence. Therefore, as in a conventional two-axis rotating device having two operation axes, each time two axes are rotated, the two operation axes are specified in the specified order. This eliminates the need for a complicated operation of rotating in the forward or reverse direction, allows easy operation, and improves the reliability because no error occurs in the operation order.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a sectional view taken along line DD of FIG. 2;

FIG. 5 is a plan view showing an embodiment of a main shaft side clutch.

FIG. 6 is a plan view showing an embodiment of a sub-shaft side clutch.

FIG. 7 is a plan view showing the clutch when the main valve body and the sub-valve valve are closed.

FIG. 8 is an explanatory diagram showing a valve closed state of a main valve body and an auxiliary valve body.

FIG. 9 is a plan view showing the clutch when the sub-valve valve is opened.

FIG. 10 is an explanatory diagram showing a valve open state of only a sub-valve element.

FIG. 11 is a plan view showing the clutch when the main valve body and the sub-valve valve are opened.

FIG. 12 is an explanatory diagram showing a valve open state of a main valve body and a sub valve body.

FIG. 13 is a plan view showing another embodiment of the clutch.

FIG. 14 is a view as seen in the direction of arrows EE in FIG. 13;

FIG. 15 is a front view of a conventional example applied to a butterfly valve with a built-in sub-valve.

FIG. 16 is a plan view of FIG.

FIG. 17 is a side view of FIG.

18 is an enlarged sectional view taken along line FF of FIG.

FIG. 19 is an enlarged sectional view taken along line GG of FIG.

[Explanation of symbols]

 4 Upper valve shaft (main shaft) 14 Shaft (sub shaft) 17 Two-axis rotating device 31 Main shaft side clutch 31A Main shaft side clutch teeth 31B Main shaft side clutch teeth 32 Sub shaft side clutch 32A Sub shaft side clutch teeth 32B Sub shaft side Clutch teeth 33 Gears 34 Sector worm wheel (worm wheel) 35 Planetary gear 36 Arc-shaped fixed teeth 37 Arm 40 Operating shaft 40A Worm R1 Valve opening direction (rotation in first direction) R2 Valve closing direction (rotation in second direction) )

Claims (1)

[Claims] 1. A main shaft and a sub shaft inserted through the main shaft along an axis of the main shaft are specified in forward and reverse directions around an axis of the main shaft by rotation of one operation shaft. A two-axis rotating device that rotates in order, comprising: a main shaft side clutch provided so as to be able to rotate simultaneously with the main shaft; and a sub shaft side clutch provided so as to be able to rotate simultaneously with the sub shaft so as to face the main shaft side clutch. A gear and a worm wheel that are provided so as to be able to rotate simultaneously with the counter shaft side clutch, and a worm that is rotatably supported with an axis that intersects the axes of the main shaft and the counter shaft, and that meshes with the worm wheel. One operating shaft provided, an arm provided on the main shaft side clutch and extending outward in the radial direction of the main shaft, meshed with the gear, and rotatably supported at a tip end of the arm. The planetary gear and an arc-shaped fixed tooth that can be meshed with the planetary gear in the main shaft, and the main shaft side clutch and the sub shaft side clutch follow the rotation of the one operation shaft in the first direction. When the gear and the countershaft-side clutch rotate in the first 90-degree positive direction in the first half, the main-shaft-side clutch is disconnected. The planetary gear is configured to be disconnected from the main shaft side clutch when the sub shaft side clutch follows the rotation of the one operation shaft in the second direction by 180 degrees in the reverse direction. In the reverse direction during the rotation of the crankshaft, and the forward direction 90 of the main shaft side clutch.
Following the 90-degree rotation of the arm in the forward direction associated with the rotation of the arm, the arm meshes with the fixed teeth of the arc shape and revolves in the forward direction while rotating in the reverse direction, and 180 degrees in the reverse direction simultaneously with the clutch on the counter shaft side. With the forward rotation of the planetary gear following the rotation of the rotating first half of the gear and the reverse rotation caused by the engagement with the arc-shaped fixed teeth during the forward rotation, the main shaft side via the arm. A two-axis rotating device with one operating shaft, wherein the clutch is configured to rotate 90 degrees in a reverse direction.