JP2001146976A - Batterfly valve with built-in auxiliary valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a batterfly valve equipped with a built-in auxiliary valve of such a structure that two shafts are rotated in accordance with the proper operating sequence automatically only by specifying the rotating direction of one operating shaft without taking the operating sequence into consideration and capable of eliminating a hazard of foreign matter inclusion by the auxiliary valve element in the condition that the main valve element is full opened. SOLUTION: One operating shaft 40 is rotated in the valve opening direction R1 while an auxiliary shaft side rotary shaft 34 is rotated at the same time in the valve opening direction R1, and an auxiliary shaft side revolving arm 32 and a shaft 14 are first rotated so that the auxiliary valve element 3 is opened and thereafter the main valve element 2 is opened. The main shaft 4 rotates 90 degs. with revolutions of a main shaft side revolving arm 31 while the auxiliary shaft 14 rotates 180 degs. with revolutions of the auxiliary shaft side revolving arm 32, and when the main valve element 2 is in 'Open' position, the auxiliary valve element 3 takes the 'Open' positioning with respect to the main valve element 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a butterfly valve with a built-in auxiliary valve.

[0002]

2. Description of the Related Art As shown in FIGS. 17 to 19, a butterfly valve with a built-in sub-valve includes a valve box 1, a main valve body 2 housed in the valve box 1 so as to be openable and closable, and a main valve body 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. 20 and 21, 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 has an upper end portion of the upper valve rod 4 in 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 stem 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 configuration, the main valve body 2 and the sub-valve body 3 are fully opened, and the main valve body 2 and the sub-valve body 3 are fully opened from the valve-closed state of the built-in sub-valve type butterfly valve. A procedure for obtaining the valve 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, from the valve-open 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 opened, a butterfly with a built-in sub-valve in which the main valve body 2 and the sub-valve body 3 are fully closed. A procedure for obtaining the valve closed state of the 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 auxiliary valve body 3 by rotating the other operation shaft 19.

[0015]

For this reason, in a conventional butterfly valve with a built-in auxiliary valve having two operating shafts, two operating shafts are required each time the main valve body and the auxiliary valve body are opened and closed. Must be rotated in the valve opening or valve closing direction in the specified order, which has the disadvantage that the operation is cumbersome.If the operation sequence is incorrect, the operating force at the time of opening and closing the valve will increase significantly. Therefore, there is a problem that smooth opening and closing of the valve are hindered. Further, the main valve body 2 is opened from the "closed" position.
The auxiliary valve element 3 is configured to rotate 90 degrees or 270 degrees while rotating 90 degrees to the position. Therefore, in the fully opened state of the main valve body 2, the sub-valve body 3 corresponds to the main valve body 2 in the “closed” posture, and in the fully opened state of the main valve body 2, foreign matter is caught by the sub-valve body 3. There is a danger of intrusion.

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. The present invention provides a butterfly valve with a built-in sub-valve that can facilitate operation, avoid an erroneous operation sequence, and eliminate the risk of foreign matter being caught by the sub-valve when the main valve is fully opened. It is intended to be.

[0017]

In order to achieve the above object, a butterfly valve with a built-in sub-valve according to the present invention is provided with a main shaft connected to a main valve element and inserted through the main shaft along the axis of the main shaft. In addition, two axes including a sub-shaft connected to a sub-valve body incorporated in the main valve body are rotated around the axis of the main shaft in the order specified in the normal and reverse directions by rotation of one operation shaft. A butterfly valve with a built-in sub-valve, wherein one operation shaft having an external thread provided on an outer periphery thereof is rotatably supported in parallel with the one operation shaft, and a sub-shaft side rotation shaft provided with an external thread on the outer periphery. A rotation transmission mechanism for transmitting rotation of the one operation shaft to the sub-shaft side rotation shaft, and a female screw portion screwed to a male screw on an outer periphery of the one operation shaft.
A female screw piece on the main shaft side that moves forward and backward in the axial direction of the one operating shaft following the rotation of the one operating shaft in the first direction and the rotation in the second direction, and a male screw on the outer circumference of the sub-shaft side rotating shaft. A female screw part on the countershaft side having a female screw portion to be engaged, and following the rotation of the countershaft rotary shaft in the first direction and the rotation of the countershaft in the axial direction of the countershaft rotary shaft; A spindle side pivot arm that is simultaneously rotatably mounted on the main shaft, and pivots in forward and reverse directions as the female screw piece on the main shaft side moves forward and backward; A countershaft-side turning arm that turns in the forward and reverse directions with the forward / backward movement of the shaft-side female screw top, and rotates the one operation shaft in the first direction to “close” the sub-valve. From the position to the "open" position of the sub-valve, and then From the "closed" position to the "open" position of the main valve body, and the main shaft is "closed" from the "open" position of the main valve body by rotation of the one operating shaft in the second direction. After turning to the position, the sub shaft closes the sub valve
The main shaft rotates 90 degrees in both the forward and reverse directions when the main shaft side turning arm rotates in the forward and reverse directions, and the sub shaft rotates in the forward and reverse directions when the main shaft side turning arm rotates in the forward and reverse directions. The main valve body is rotated by 180 degrees in each of the directions, and at the “open” position of the main valve body, the sub-valve body is configured to correspond to the “open” posture with respect to this main valve body. I have.

According to the present invention, the rotation of the one operating shaft in the first direction causes the rotation shaft on the auxiliary shaft side to rotate via the rotation transmitting mechanism. The rotation of the countershaft-side rotation shaft advances the countershaft-side female screw top, turns the countershaft-side turning arm, rotates the countershaft and the sub-valve simultaneously by 90 degrees, and opens the sub-valve valve. Although the female screw top on the main spindle side advances by the rotation of one operation shaft in the first direction, while the female screw top on the main spindle side moves from the advance start position to the middle of the advance, the main spindle side turning arm, the main spindle and the main valve. The body has stopped.

By continuing the rotation of the one operating shaft in the first direction, the sub shaft and the sub valve body are further rotated by 90 degrees, and the female screw piece on the main shaft turns the main shaft side turning arm during the forward movement. By rotating the main shaft and the main valve body by 45 degrees, the main valve body is opened at an intermediate opening degree.

By further continuing the rotation of one operation shaft in the first direction, the female screw top on the counter shaft side moves forward, but while the female screw top on the counter shaft side moves to the forward end position, the counter shaft side The swing arm, the counter shaft and the counter valve are stopped. On the other hand, while the female screw piece on the main shaft moves to the forward end position, the main shaft and the main valve are further rotated by 45 degrees to fully open the main valve. Thus, at the “open” position of the main valve, the sub-valve corresponds to the main valve in the “open” posture.

In the above state, the second operation axis
Due to the rotation in the direction, the female screw piece on the spindle side is retracted. While the female screw top on the spindle side is moving from the retreat start position to the middle of the retraction, the spindle side revolving arm is reversely rotated to reversely rotate the main shaft and the main valve body by 45 degrees. The rotation of one operating shaft in the second direction causes the female screw piece on the sub shaft to retreat, but during this time, the sub shaft turning arm, the sub shaft, and the sub valve are stopped.

By continuing the rotation of one operating shaft in the second direction, the female screw piece on the main shaft reciprocates the main shaft side revolving arm while retreating, and reversely rotates the main shaft and the main valve body by 45 degrees. Fully close the main valve. In addition, due to the rotation of one operation shaft in the second direction, the female screw piece on the sub shaft side reversely turns the sub shaft side turning arm during the retreat, and reversely rotates the sub shaft and the sub valve body by 90 degrees.

When the rotation of one operating shaft in the second direction is further continued, the female screw piece on the main shaft side is retracted, but during this time, the main shaft side turning arm, the main shaft and the main valve body are stopped. On the other hand, while the female screw top on the countershaft moves to the retreat end position, the countershaft and the sub-valve are further rotated 90 degrees to fully close the sub-valve.

[0024]

An embodiment of the present invention will be described below with reference to the drawings. The structures of the valve box 1, the main valve element 2, the sub-valve element 3, the upper valve rods 4, 9, the lower valve rods 5, 10, the shaft 14 and the like are the same as those of the conventional example, and are not shown. FIG.
7 to 21 are denoted by the same reference numerals.

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
It is a line sectional view. In these figures, the two-axis rotating device 1
7 is a main shaft side swing arm 31 and a counter shaft side swing arm 32
And an operating shaft 40 having an axis crossing the axes of the main shaft 4 and the sub shaft 14 and rotatably supported by the casing 41, and having a male screw 40A on the outer periphery. A bevel gear 44A is attached to one end of the operation shaft 40, and this bevel gear 44A meshes with a bevel gear 44B attached to the lower end of the input shaft 44.

The turning arm 31 on the main shaft side has a boss-shaped base 3.
1A and a pair of arms 31B, 31B extending radially outward from the boss-shaped base 31A and facing up and down, and the upper end of the upper valve rod 4 in the main valve body 2 is provided with a boss-shaped base. The keys 33A are fitted to each other so as to be rotatable at the same time. A gear 45 is mounted on the upper side of the boss-shaped base 32A of the countershaft-side turning arm 32,
This gear 45 is a small gear 46 attached to the upper end of the counter shaft 14.
And are engaged. The rotation angle ratio between the gear 45 and the small gear 46 is set to 1: 2. That is, when the rotation angle of the gear 45 is 45 degrees, the rotation angle of the small gear 46 is 90 degrees.
Doubled every time.

On the casing 41, a countershaft-side rotating shaft 34 is rotatably supported in parallel with one operating shaft 40.
A reverse external thread 34 </ b> A is provided on the outer periphery of the counter shaft side rotation shaft 34. In addition, from one operation shaft 40 to the counter shaft side rotation shaft 34.
Is transmitted by the rotation transmission mechanism 36 shown in FIG. The rotation transmission mechanism 36 includes a drive gear 36A fixed to one operation shaft 40, an intermediate gear 36B, and a driven gear 36C fixed to the counter shaft side rotation shaft 34.

A female screw piece 3 on the main shaft side having a female screw portion 37A screwed into a male screw 40A on the outer periphery of one operation shaft 40.
7 are provided. One end of the female screw top 37 is
A first guide 38A provided parallel to one operation shaft 40 is slidably penetrated. Therefore, one operation shaft 40
The female screw piece 37 on the main shaft side moves forward and backward in the axial direction of one operation shaft 40 following the rotation of.

One first connecting portion 39A is provided on the upper and lower sides of the portion where the female screw portion 37A is formed in the female screw top 37 on the spindle side, and is formed of a pair of pins projecting vertically. ing. In addition, the spindle side swivel arm 3
A pair of upper and lower arms 31B, 31 facing each other in 1
In B, the other first connecting portion 42 formed of a slit that slidably penetrates one first connecting portion 39A is provided so as to penetrate in the thickness direction. The other first connecting portion 42
A first portion 42A extending straight from the tip of the spindle-side swivel arm 31 to an intermediate position, and a second portion 42B that bends from the rear end of the first portion 42A toward the center of the base of the spindle-side swivel arm 31. In the state where the main valve body 2 is fully closed, one of the first connecting portions 39A is located at the tip of the first portion 42A of the other first connecting portion 42.

The female screw top 3 on the countershaft side having a female screw portion 35A screwed to the male screw 34A on the outer periphery of the rotary shaft 34 on the countershaft side.
5 are provided. One end of the female screw top 35 is
A second guide 38B provided parallel to one operation shaft 40 is slidably penetrated. Therefore, the countershaft side rotation shaft 34
The female screw top 35 on the counter shaft side advances and retreats in the axial direction of the counter shaft side rotation shaft 34 following the rotation of.

A second connecting portion 39B is provided above the portion where the female screw portion 35A is formed in the female screw top 35 on the counter shaft side, and is formed of one pin projecting upward. In addition, the countershaft-side swivel arm 32 is provided with another second connecting portion 43 formed of a slit that slidably penetrates one second connecting portion 39B so as to penetrate in the thickness direction. The other second linking portion 43 is a first portion 4 that extends straight from the tip of the counter shaft side turning arm 32 to halfway.
3A and a second portion 43B that bends from the rear end of the first portion 43A toward the center of the base of the countershaft-side swivel arm 32.
When the sub-valve 3 is fully closed, one second connecting portion 39B is located at the tip of the second portion 43B of the other second connecting portion 43.

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

When the main valve body 2 and the sub-valve body 3 shown in FIGS. 5, 6 and 7 are fully closed, the other first connecting portion 42
At one end of the first portion 42A in the first connecting portion 3
9A is located to exhibit a self-locking function for restraining the turning of the main shaft-side turning arm 31 and prevent the main valve body 2 from swinging due to a fluid load. Further, the other second linking portion 43
At one end of the second portion 43B in the second connecting portion 3
9B is located to exhibit a self-locking function for restraining the rotation of the sub-shaft-side turning arm 32, thereby preventing the sub-valve element 3 from swinging due to a fluid load.

In this state, the rotation of the input shaft 45 causes 1
When the two operation shafts 40 are rotated in the valve opening direction R1, the rotation is transmitted to the counter shaft side rotation shaft 34 via the rotation transmission mechanism 36, and the counter shaft side rotation shaft 34 rotates. Counter shaft side rotating shaft 3
By the rotation of 4, the female screw top 35 on the counter shaft side advances from the position in FIG. 6 to the position in FIG. 9, and one of the second connecting portions 39B interferes with the other second connecting portion 43, so that the counter shaft side turning arm 32 is rotated. Is turned 45 degrees. This turning is transmitted to the gear 46 via the gear 45, and rotates the sub shaft 14 by 90 degrees to open the sub valve body 3 as shown in FIG. The rotation of one operating shaft 40 in the valve opening direction R1 causes the female screw top 37 on the main shaft side to rotate as shown in FIG.
8 to the position shown in FIG. 8, during this movement, one of the first connecting portions 39A is connected to the other first connecting portion 42A.
Move forward along the first portion 42A. That is, since the other first connecting portion 42 does not interfere with one of the first connecting portions 39A, the main shaft-side turning arm 31, the main shaft 4, and the main valve body 2 are stopped. Moreover, the other first connecting portion 4
2, one of the first connecting portions 39A is located at the boundary between the first portion 42A and the second portion 42B, and exhibits a self-locking function of restraining the turning of the main shaft side turning arm 31. Swing of the main valve body 2 can be prevented. Also, one second connecting portion 39B is located on the base end side of the other second connecting portion 43, and
A self-locking function for restraining the turning of the sub-valve 3 is prevented, and the swing of the sub-valve body 3 due to the load of the fluid is prevented.

In the state where only the sub-valve element 3 shown in FIG. 10 is open, the rotation of one operating shaft 40 in the valve opening direction R1 is continued, so that the female screw top 35 on the sub-shaft side is moved to the position shown in FIG. 12, the one second connecting portion 39B interferes with the other second connecting portion 43 to rotate the counter shaft side turning arm 32 by 45 degrees. This turning is performed by the gear 45.
, And is rotated by 90 degrees to hold the sub-valve element 3 in the posture of FIG. At the same time, the female screw top 37 on the spindle side advances from the position in FIG. 8 to the position in FIG. As a result, one of the first connecting portions 39A interferes with the second portion 42B of the other first connecting portion 42, thereby turning the spindle-side turning arm 31 by 45 degrees and rotating the main shaft 4 by 45 degrees around the axis. As shown in FIG.
The valve is held at the intermediate opening degree. Further, the swing of the main valve body 2 and the sub-valve body 3 due to the load of the fluid can be prevented by the self-lock function described above.

In the state shown in FIG. 13, the first
By further continuing the rotation in the direction, the female screw top 35 on the counter shaft side moves from the position in FIG. 12 to the forward end position in FIG. 15, but during this movement, one second connecting portion 39B is connected to the other. First portion 43A in second linking portion 43
Move forward along. That is, the one second connecting portion 39
Since the other second connecting portion 43 does not interfere with B, the sub-shaft-side turning arm 32, the sub-shaft 14, and the sub-valve 3 are stopped. On the other hand, when the female screw top 37 on the main shaft side moves from the position shown in FIG. 11 to the forward end position shown in FIG. 14, the one first connecting portion 39A becomes the second connecting portion 42 in the other first connecting portion 42.
By interfering with the part 42B, the main shaft-side turning arm 31 is turned 45 degrees, and the main shaft 4 is turned 45 degrees around the axis.
The main valve body 2 is fully opened as shown in FIG. Thereby, the main valve body 2
Is rotated by 90 degrees, the sub-valve 3 rotates by 180 degrees, and the sub-valve 3 corresponds to the main valve 2 in the "open" posture. Therefore, when the main valve element 2 is fully opened, the sub-valve element 3
Therefore, the risk of foreign matter being caught by the above can be eliminated.
Further, the swing of the main valve body 2 and the sub-valve body 3 due to the load of the fluid can be prevented by the self-lock function described above.

The rotation of the input shaft 44 in the state shown in FIGS. 14, 15 and 16 causes one operating shaft 40 to move in the valve closing direction R.
When rotated to 2, the female screw top 37 on the main shaft side is retracted. The female screw top 37 on the spindle side is moved from the position of FIG.
During this time, the main shaft-side turning arm 31 is turned 45 degrees in the reverse direction, and the main shaft 4 and the main valve body 2 are turned 45 degrees in the reverse direction. In addition, the rotation of the one operating shaft 40 in the valve closing direction R2 causes the female screw top 35 on the counter shaft side to retreat from the position in FIG. 15 to the position in FIG. 12, but during this time, the counter shaft side turning arm 32 and the counter shaft 14 and the sub-valve 3 are stopped, and the main valve 2 and the sub-valve 3 are in the state of FIG.

By continuing to rotate the one operating shaft 40 in the valve closing direction R2, the female screw top 37 on the main shaft moves from the position shown in FIG. 11 to the position shown in FIG.
1 is rotated 45 degrees in the reverse direction, the main shaft 4 and the main valve body 2 are rotated in the reverse direction by 45 degrees, and the main valve body 2 is fully closed as shown in FIG. In addition, by rotation of one operation shaft 40 in the valve closing direction R2, the female screw top 35 on the counter shaft side moves from the position in FIG. 12 to the position in FIG. , The countershaft 14 and the sub-valve 3 are reversely rotated 90 degrees as shown in FIG.

When the rotation of one operating shaft 40 in the valve closing direction R2 is further continued, the female screw piece 37 on the main shaft side moves from the position shown in FIG. 8 to the position shown in FIG. 31, the main shaft 4 and the main valve body 2 are stopped, and the main valve body 2 is fully closed as shown in FIG. on the other hand,
The female screw top 35 on the countershaft side moves from the position in FIG. 9 to the position in FIG. 6 to reversely rotate the countershaft-side swing arm 32 by 45 degrees and reversely rotate the countershaft 14 and the sub-valve element 3 by 90 degrees. And fully closed as shown in FIG.

As described above, the rotation direction of one operating shaft 40 is specified without considering the opening / closing operation order of the main valve body 2 and the sub-valve body 3 and the main valve body 2 is determined based on the opening / closing operation order.
And the auxiliary valve element 3 can be opened and closed, so that when opening and closing the main valve element 2 and the auxiliary valve element 3 each time, as in a conventional two-axis rotating device having two operation shafts, There is no need to perform a complicated operation of rotating the two operation shafts in the specified order in the valve opening or valve closing direction, so that the operation can be easily performed and the operation order does not cause an error. Moreover,
As shown in FIG. 16, when the main valve element 2 is in the fully open position, the sub-valve element 3 corresponds to the main valve element 2 in an "open" posture. Therefore, it is possible to eliminate the risk of foreign matter being caught by the sub-valve 3 when the main valve 2 is fully opened.

[0041]

As described above, according to the present invention, an appropriate opening / closing operation sequence can be achieved by merely specifying the rotation direction of one operation shaft without considering the opening / closing operation sequence of the main shaft and the sub shaft. Since the two axes can be automatically rotated based on the two axes, the two axes can be rotated in the specified order each time the two axes are rotated, as in a conventional two-axis rotating device having two operation axes. This eliminates the need for a complicated operation of rotating in the opposite direction or in the opposite direction, allows easy operation, and does not cause an error in the operation order, thereby improving reliability. In the fully opened position where the main valve body is rotated 90 degrees,
The sub-valve rotates by 180 degrees, and the sub-valve responds to the main valve in an "open" posture. For this reason, it is possible to eliminate the risk of foreign matter being caught by the sub-valve when the main valve is fully opened.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one 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. 1;

FIG. 4 is an enlarged sectional view showing an example of a rotation transmission mechanism.

5 is a diagram corresponding to FIG. 2 when the main valve body is fully closed.

6 is a diagram corresponding to FIG. 3 when the sub-valve is fully closed.

FIG. 7 is an explanatory view showing a closed state of a main valve body and a sub-valve body.

FIG. 8 is a diagram corresponding to FIG. 2 when the main valve body is fully closed.

FIG. 9 is a view corresponding to FIG. 3 when the auxiliary valve body valve is opened.

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

FIG. 11 is a view corresponding to FIG. 2 when the main valve body is half-opened.

12 is a diagram corresponding to FIG. 3 when the sub-valve is rotated by 180 degrees.

FIG. 13 is an explanatory view showing a state in which a main valve body is half-opened and a sub-valve body is rotated by 180 degrees.

FIG. 14 is a diagram corresponding to FIG. 2 when the main valve body is fully opened.

FIG. 15 is a diagram corresponding to FIG. 3 when the sub-valve is rotated by 180 degrees.

FIG. 16 is an explanatory view showing a state in which a sub-valve body corresponds to a fully opened main valve body in an “open” posture.

FIG. 17 is a front view of a conventional example.

18 is a plan view of FIG.

FIG. 19 is a side view of FIG. 17;

FIG. 20 is an enlarged sectional view taken along line DD of FIG. 18;

21 is an enlarged sectional view taken along line EE in FIG.

[Explanation of symbols]

 2 Main valve body 3 Secondary valve body 4 Upper valve stem (Main shaft) 14 Shaft (Sub shaft) 17 Two-axis rotating device 31 Main shaft side swing arm 32 Secondary shaft side swing arm 34 Secondary shaft side rotation shaft 34A Secondary shaft side rotation shaft Male screw 35 Counter shaft side female screw top 35A Female screw part of counter shaft side female screw top 36 Rotation transmission mechanism 37 Main shaft side female screw top 37A Female screw part of main shaft side female screw top 40 Operating shaft 40A Male screw R1 Valve opening direction (rotation in first direction) R2 Valve closing direction (rotation in the second direction)

Claims (1)

[Claims] 1. A main shaft connected to a main valve body and a sub shaft connected to a sub-valve body inserted in the main shaft along the axis of the main shaft and connected to the main valve body. 1. An auxiliary valve built-in butterfly valve which rotates in a specified order in the forward and reverse directions around the axis of the main shaft by rotation of one operation shaft, and one operation shaft provided with a male screw on the outer periphery. A countershaft-side rotation shaft that is rotatably supported in parallel with the two operation shafts and has a male screw on the outer periphery, a rotation transmission mechanism that transmits the rotation of the one operation shaft to the countershaft-side rotation shaft, A female screw portion which is screwed into a male screw on the outer periphery of the one operation shaft, and which moves forward and backward in the axial direction of the one operation shaft following rotation of the one operation shaft in the first direction and rotation of the one operation shaft; A female screw top on the main shaft side, and a male on the outer circumference of the sub shaft side rotary shaft. A female screw portion having a female screw portion that is screwed with the female screw member, the female screw member having a female screw portion that advances and retreats in the axial direction of the rotary shaft side following the rotation of the rotary shaft in the first direction and the second direction. A top, a main shaft side turning arm that is attached to the main shaft so as to be rotatable at the same time, and that rotates in the forward and reverse directions with the advance / retreat movement of the female screw top on the main shaft; A counter-shaft-side pivot arm that pivots in the forward and reverse directions with the reciprocating movement of the counter-screw-side female screw piece, and rotates the sub-shaft with the sub-valve body by rotating the one operating shaft in the first direction. The main shaft is rotated from the "closed" position of the main valve to the "open" position of the main valve after the main shaft is rotated from the "closed" position to the "open" position of the sub-valve.
Position, and the main shaft is rotated from the "open" position of the main valve body to the "closed" position of the main valve body by the rotation of the one operating shaft in the second direction, and then the sub shaft is moved to the sub valve body. Said "closed"
The main shaft rotates 90 degrees in both the forward and reverse directions when the main shaft side turning arm rotates in the normal and reverse directions, and the sub shaft rotates in the normal and reverse directions when the sub shaft side turning arm rotates in the normal and reverse directions. The main valve is rotated by 180 degrees in each of the directions, and at the “open” position of the main valve, the sub-valve is configured to correspond to the “open” posture with respect to the main valve. Butterfly valve with built-in auxiliary valve.