JP2001349445A - Auxiliary valve-containing buttery valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary valve-containing butterfly valve capable of easily and securely conducting fine adjustment to an installation position of a uniaxial drive reducer to a stand even when seating improperness is recognized, and properly correcting seating. SOLUTION: An auxiliary valve element 3 is contained in a main valve element 2 contained in a valve body 1. A tip part of a main shaft 4 connected to the main valve element 2 and a tip part of an auxiliary shaft 14 rotatably inserted into the main shaft 4 are inserted into a uniaxial drive reducer 17 detachably fastened to a stand 16 installed on the valve body 1 by a fastening means 18 through the stand 16 and reduction-drivably connected. A fastening means movement permitting part 22 comprising plural slits in which the fastening means 18 is inserted is provided on an upper end flange part 16B, and a rotation mechanism 23 is provided for rotating the uniaxial drive reducer 17 around an axial line C of the main shaft 4 straddling the upper flange part 16B and a lower flange part 17A of the uniaxial drive reducer 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve with a built-in auxiliary valve, and more particularly, to a main shaft connected to a main valve body of a butterfly valve and a main valve body housed in a main valve body by rotating one operation shaft. The present invention relates to a butterfly valve with a built-in sub-valve capable of driving a sub-shaft connected to a sub-valve body in the forward and reverse directions.

[0002]

2. Description of the Related Art Conventionally, by rotating one operating shaft, a main shaft connecting a main valve element of a butterfly valve and a sub shaft connecting a sub-valve element housed in the main valve element are rotated in forward and reverse directions. A butterfly valve BV with a built-in sub-valve that can be decelerated has already been proposed by the present applicant (for example, see Japanese Unexamined Patent Application Publication No.
000-28008). As shown in FIGS. 5 and 6, this type of sub-valve-incorporated type butterfly valve B / V includes a valve case 1, a main valve body 2 which is housed in the valve case 1 so as to be openable and closable, and
The main valve body 2 includes an auxiliary valve body 3 housed in a freely openable and closable manner. An upper valve rod (main shaft) 4 and a lower valve rod 5 are fixed to the main valve element 2. The main shaft 4 is a cylindrical member provided with a through hole 6 in the direction of the axis C. The main shaft 4 is rotatably and airtightly supported around the axis C by the upper shaft support 7 of the valve box 1 and projects above the upper shaft support 7. I have. The lower valve stem 5 is rotatably and air-tightly supported around the axis C by the lower shaft supporting portion 8 of the valve box 1, and the main shaft 4 and the lower valve stem 5 rotate around the axis C in the forward and reverse directions to rotate the main valve 4. The valve body 2 opens and closes the passage of the valve box 1.

The sub-valve 3 has an upper valve stem 9 and a lower valve stem 10.
Is fixed, and the upper valve rod 9 is rotatably and air-tightly supported around the axis C by the upper shaft support 12 of the sub-valve box 11 provided on the main valve body 2, and projects 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 sub-shaft 14 having an upper end projecting above the main shaft 4 is rotatably inserted around the axis C through a through hole 6 provided in the main shaft 4 in the direction of the axis C. 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.

A lower end flange 16A of a stand 16 is fastened and mounted on the upper shaft support 7 of the valve box 1 by a plurality of bolts and nuts 19, and a uniaxial drive reducer 17 is mounted on the upper end flange 16B of the stand 16. The lower end is removably fastened and mounted by fastening means 18 comprising a plurality of bolts.

As shown in FIGS. 7, 8, 9, 10 and 11, the single-shaft drive speed reducer 17 includes a main shaft side turning arm 31, a sub shaft side worm gear 32, a main shaft 4 and a sub shaft 14. Is rotatably supported by the casing 41 with an axis intersecting the axis of
A provided with one operation shaft 40.

The spindle-side swivel arm 31 has a boss-shaped base 3.
1A and a pair of arms 31B and 31B extending radially outward from the boss-shaped base 31A and facing vertically, and the upper end of the main shaft 4 of the main valve body 2 is connected to the boss-shaped base 31A. They are fitted and connected to each other by a key 33A so as to be able to rotate simultaneously. In addition, the counter shaft side worm gear 32 includes:
The upper end of the shaft 14 is fitted and connected so as to be simultaneously rotatable by a key 33B.

The worm shaft 3 on the counter shaft side is provided on the casing 41.
4 is rotatably supported in parallel with one operating shaft 40, and a worm 35 meshing with the worm gear 32 is fixedly mounted on the worm shaft 34 so as to be able to rotate simultaneously. Also, one operation shaft 40 and the counter shaft side worm shaft 3
4 is configured to be able to rotate simultaneously 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 36
B and a driven gear 36 fixed to the counter shaft side worm shaft 34
C is provided.

On the other hand, the external thread 4 on the outer periphery of one operation shaft 40
Female screw top 37 having female screw portion 37A screwed to 0A
Is provided. At one end of the female screw top 37,
A guide 38 provided in parallel with one operation shaft 40 slidably penetrates. Therefore, the female screw top 37 moves forward and backward in the axial direction of one operation shaft 40 following the rotation of one operation shaft 40.

On the other hand, the female screw portion 3 of the female screw top 37
One connecting portion 39 which is located on both sides of the upper and lower sides of the formation portion of 7A and is formed by a pair of pins projecting vertically.
Is provided. Also, a pair of upper and lower arm portions 31B, 31B of the main spindle side turning arm 31 are provided with:
The other connecting portion 42 formed of a slit that slidably penetrates one connecting portion 39 is provided to penetrate in the thickness direction. The other connecting portion 42 is connected to the spindle-side swing arm 3.
A first portion 42A extending straight from the tip of 1 to the middle,
From the rear end of the first portion 42A, the main shaft side swing arm 31
And a second portion 42B that bends toward the center of the base portion. In a state where the main valve body 2 and the sub-valve body 3 shown in FIG. One connecting portion 39 is located at the distal end.

According to the single-shaft drive speed reducer 17, the rotation of one operating shaft 40 allows the main valve body 2 of the butterfly valve B / V with a built-in sub-valve to be connected to the main valve body 2 and the main valve body 2 to house the main valve body 2. The main valve 2 and the sub-valve 3 can be opened and closed by decelerating and driving the sub-shaft 14 connected to the sub-valve 3 in the forward and reverse directions. That is, when one operating shaft 40 is rotated in the valve opening direction R1 in a state where the main valve body 2 and the sub-valve body 3 are fully closed, the sub-shaft-side worm shaft 34 rotates through the rotation transmission mechanism 36. I do. The rotation of the counter shaft side worm shaft 34 causes the counter shaft side worm gear 32 meshing with the worm 35 to rotate.
The sub-shaft 14 is rotated 90 degrees in the X1 direction and the sub-shaft 14 is simultaneously rotated 90 degrees to open the sub-valve 3 and
7 is advanced in the direction of arrow X1. FIG. 7 shows the female screw top 37.
During the movement from the forward start position to the middle of the forward movement indicated by the solid line in FIG. 8, one connecting portion 39 advances along the first portion 42A of the other connecting portion 42, that is, the one connecting portion Since the other connecting portion 42 does not interfere with 39, the spindle-side turning arm 31 and the spindle 4 are stopped.

When the rotation of one operating shaft 40 in the valve opening direction R1 is continued in a state where only the sub-valve 3 is open, the sub-shaft 14 continues to rotate, and the female screw top of FIG. It moves from the position shown by the solid line to the position shown by the two-dot chain line, during which it interferes with one connecting portion 39 at the first portion 42B of the other connecting portion 42, so that the main spindle side arm 3
SR1 from the position indicated by the solid line to the position indicated by the two-dot chain line
The main valve body 2 is opened to an intermediate opening by rotating the main shaft 4 by 45 degrees at the same time. While the main shaft side turning arm 31 is turning 45 degrees in the SR1 direction, the sub shaft side worm gear 32 is further rotated 90 degrees in the RX1 direction to rotate the sub shaft 14 around the axis by 90 degrees. Valve body 3
Is opened at an intermediate opening.

If the rotation of one operating shaft 40 in the valve opening direction R1 is continued in a state where the main valve body 2 and the sub-valve body 3 are opened at an intermediate opening, the shaft 14 continues to rotate, And one connecting portion 39 is a second portion 42 in the other connecting portion 42.
Interfering with B, the main shaft side turning arm 31 is further turned 45 degrees in the SR1 direction to reach the valve opening end position shown in FIG. At the same time, the main shaft 4 rotates 45 degrees to fully open the main valve body 2. While the main shaft side turning arm 31 turns 45 degrees in the SR1 direction from the position indicated by the two-dot chain line in FIG. 8 to reach the valve opening end position shown in FIG. 10, the sub shaft side worm gear 32 further moves 90 degrees in the RX1 direction. The auxiliary valve body 3 is closed.

As described above, the main valve body 2 is fully opened,
In the state of FIG. 10 where the sub-valve element 3 is closed, 1
When the two operating shafts 40 are rotated in the valve closing direction R2, the rotation is transmitted to the counter shaft side worm shaft 34 via the rotation transmission mechanism 36, and the counter shaft side worm shaft 34 rotates in the reverse direction. By the reverse rotation of the counter shaft side worm shaft 34, the counter shaft side worm gear 32 meshing with the worm 35 reversely rotates 90 degrees in the RX2 direction, rotates the counter shaft 14 in the reverse direction, and opens the sub valve body 3 to the intermediate opening degree. And the female screw top 37 is retracted in the direction of arrow X2. While the female screw top 37 is retracted from the retreat start position in FIG. 10 to the position indicated by the two-dot chain line in FIG. 8, one connecting portion 39 interferes with the second portion 42B in the other connecting portion 42. Therefore, the main shaft-side turning arm 31 in FIG. 10 reversely turns 45 degrees in the SR2 direction to reach the position indicated by the two-dot chain line phantom line in FIG. 8, and opens the main valve body 2 at the intermediate opening.

In a state where the main shaft side swing arm 31 reaches the position shown by the two-dot chain line in FIG. 8 and the main valve body 2 and the sub-valve body 3 are opened at an intermediate opening, one operating shaft 40 is opened. When the rotation in the valve closing direction R2 is continued, the counter shaft side worm shaft 3
4 continues to rotate, and the countershaft-side worm gear 32 becomes RX2.
The auxiliary shaft 14 is further rotated in the reverse direction by 90 degrees, the auxiliary shaft 14 is rotated in the opposite direction about the axis, the auxiliary valve element 3 is opened, and the female screw top 37 is further retracted in the arrow X2 direction. Female screw top 37
8 moves back from the position indicated by the two-dot chain line to the position indicated by the solid line in FIG. 8, one connecting portion 39 interferes with the second portion 42B of the other connecting portion 42. For this reason, the main shaft side turning arm 31 shown by the two-dot chain line turns further 45 degrees in the SR2 direction, reaches the position shown by the solid line, and fully closes the main valve body 2.

In a state where the main shaft side turning arm 31 reaches the position shown by the solid line in FIG. 8, the main valve body 2 is fully closed, and the sub-valve body 3 is open, the valve of one operation shaft 40 is opened. Closing direction R
When the rotation of No. 2 is continued, the reverse rotation of the counter shaft side worm shaft 34 continues, and the counter shaft side worm gear 32 further reversely rotates 90 degrees in the RX2 direction to rotate the counter shaft 14 reversely around the axis. While closing the valve body 3, the female screw top 37 further retreats in the direction of arrow X2. While the female screw top 37 is retracted from the position shown by the solid line in FIG. 8 to the position shown in FIG. 7, one connecting portion 39 is connected to the first portion 42 of the other connecting portion 42.
A state of retreating along A, that is, one connecting portion 3
9 does not interfere with the other connecting portion 42,
The main valve-side turning arm 31 and the main shaft 4 are stopped.

As described above, according to the conventional butterfly valve B / V with a built-in auxiliary valve, the rotation direction of one operating shaft 40 can be changed without considering the opening / closing operation order of the main valve body 2 and the auxiliary valve body 3. By simply specifying the main shaft 4 and the sub shaft 1 based on the opening / closing operation sequence.
By rotating the two axes 4, the main valve 2 and the sub-valve 3 can be opened and closed in the specified order.

[0018]

The fully closed position (seating position) of the main valve body 2 in the butterfly valve B / V with a built-in sub-valve is uniaxially driven with the butterfly valve B / V with a built-in sub-valve. It is determined by the relative positional relationship with the speed reducer 17. That is, the uniaxial drive reduction gear 17 mounted on the stand 16 is connected to the fastening means 18 comprising a plurality of bolts.
Is determined by the mounting position when fastened to the stand 16. However, in the state shown in FIG. 7 in which the main valve body 2 is held at the fully closed position, the uniaxial drive speed reducer 17 is
6, the seating of the valve body sheet (not shown) of the main valve body 2 and the valve box sheet (not shown) of the valve box 1 cannot be properly performed, and the seating pressure is smaller than an appropriate value. When the seating pressure is smaller than the appropriate value, fluid leakage occurs when the main valve body 2 is fully closed, and conversely, the seating pressure becomes larger than the appropriate value. Becomes too large, it becomes difficult for one operation shaft 40 to open the main valve body 2.

If the seating is not appropriate, the single-shaft drive speed reducer 17 is slightly rotated about the axis C of the main shaft 4 to finely adjust the mounting position of the single-shaft drive speed reducer 17 with respect to the stand 16 in the circumferential direction. This makes it possible to correct to an appropriate state. However, the dimensional difference between the outer diameter of the plurality of bolts constituting the fastening means 18 and the inner diameter of the plurality of bolt insertion holes (not shown) provided in the stand 16 for inserting these bolts is extremely large. Since it is set to be small, not only can the single-shaft drive reducer 17 be slightly rotated around the axis C of the main shaft 4,
Even if the dimensional difference is set large, in particular, after installation on site, the single-shaft drive speed reducer 17
It is extremely difficult to slightly adjust the position of the uniaxial drive speed reducer 17 with respect to the stand 16 by slightly rotating the shaft 16 around the axis C, which is almost impossible in practice.

Therefore, the present invention provides a sub-valve that can easily and surely finely adjust the mounting position of a single-shaft drive reducer with respect to a stand even if it is confirmed that seating is inappropriate, and that seating can be properly corrected. The purpose is to provide a built-in butterfly valve.

[0021]

In order to achieve the above object, a butterfly valve with a built-in auxiliary valve according to the present invention comprises a main valve element housed in a valve box so as to be openable and closable, and A main valve body that connects the sub-valve element housed in the main valve element and the main valve element and that is rotatably and airtightly supported around an axis by a shaft support portion of the valve box, and that has a tip end protruding outside the valve box. And a sub-shaft connecting the sub-valve and rotatably inserted through the main shaft along the axis of the main shaft, and having a tip end protruding outside the valve box, and provided on the valve box. A stand having the main shaft and the countershaft protruding outside the valve box protruding therefrom, and being removably fastened to the stand by a fastening means, and inserting the protruding portions of the main shaft and the subshaft outside the valve housing to reduce the speed. Butterf with built-in auxiliary valve with single-shaft drive reducer connected as possible In the valve b, the stand is provided with a fastening means movement permitting portion which is capable of allowing the fastening means to move around the axis of the main shaft when the fastening means is not fastened. It is characterized in that it is provided with a rotation mechanism for rotating the rotation.

According to the present invention, even if it is confirmed that the seating is inadequate, the fastening means is set in the non-fastened state, and the fastening means is allowed to move around the axis of the main shaft by the fastening means movement permitting portion. By operating the rotation mechanism, the single-shaft drive speed reducer is rotated around the axis of the main shaft, and fine adjustment of the mounting position can correct the seating properly.

[0023]

An embodiment of the present invention will be described below with reference to the drawings. The same parts as those of the conventional sub-valve built-in butterfly valve are denoted by the same reference numerals, and the duplicated description will be omitted. The valve box 1, the main valve body 2, the sub-valve body 3, the main shaft 4, the lower valve Rod 5, upper valve rod 9, lower valve rod 10, counter shaft 1
Since the structures such as 4 are the same as those of the conventional example, illustration thereof is omitted.

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a side view of FIG. In these figures, a lower end flange portion 17A of a uniaxial drive reduction gear 17 is concentrically mounted on an upper end flange portion 16B of a stand 16 and is detachably fastened by fastening means 18 composed of a plurality of bolts. In other words, a plurality of (for example, six) bolts constituting the fastening means 18 have the same number of bolt insertion holes 20 as the bolts provided on the upper end flange portion 16B of the stand 16.
Are screwed into screw holes 21 of the same number as the bolts provided to open downward in the lower end flange portion 17A. As shown in FIG. 4, the bolt insertion hole 20 is formed as a long hole extending in the circumferential direction, and the plurality of (for example, six) long holes 20 constitute the fastening means movement permitting portion 22. .

On the other hand, a pair of left and right rotation mechanisms 23 is provided so as to straddle the lower flange 17A of the single-shaft drive reduction gear 17 and the upper flange 16B of the stand 16. The rotation mechanism 23 is provided with protruding pieces 24, 24 integrally protruded from the lower end flange portion 17 </ b> A to the outside in the radial direction, and corresponds to the protruding pieces 24, 24 so as to be capable of coming into contact with and separating from both side faces in the thickness direction. A pair of adjustment bolts with hexagonal holes 25A, 25B
These adjusting bolts 25A, 25B are provided with raised portions 26A, 26A formed on both sides of the outer ends of beams 26, 26 which are provided radially outward from the upper end flange portion 16B of the stand 16 and are integrally provided. Screwed into each other, and sandwiches both side surfaces of the protruding pieces 24, 24 at their respective ends.
This state is configured to be maintained by tightening the lock nuts 27, 27.

In the above configuration, the main valve body 2 is held at the fully closed position as shown in FIG. 7, and the single-shaft drive speed reducer 17 is mounted on the stand 16 despite being fastened.
When it is confirmed that the seating is in an improper state in which fluid leakage occurs when the main valve body 2 is fully closed, that is, a state in which the seating pressure is smaller than an appropriate value, first, the fastening means 18 of FIG. Loosen the fastener to the non-fastened state. Next, the tightening of the lock nuts 27, 27 in the rotation mechanism 23 of FIG.
5B is brought into a state where it can be moved forward and backward by rotation. Then, after retracting the adjustment bolt 25B, the adjustment bolt 2
Advance 5A. As a result, the protruding pieces 24, 24 are pressed, and the plurality of bolts forming the fastening means 18 pass through the fastening means movement permitting portion 22 formed by the plurality of elongated holes 20 from below in the non-fastened state. Therefore, the single-shaft drive speed reducer 17 can be slightly rotated about the axis C of the main shaft 4 indicated by the solid arrow to finely adjust the mounting position. By performing the fine adjustment of the mounting position in this manner, the seating is properly corrected, and the leakage of the fluid in the fully closed state of the main valve body 2 can be prevented. If the seating has been properly corrected, the adjustment bolts 25A, 2
After strongly sandwiching both side surfaces of the protruding pieces 24, 24 with 5B,
This state is maintained by tightening the lock nuts 27, 27 to prevent the uniaxial drive reducer 17 from rotating unintentionally around the axis C of the main shaft 4 and causing a positional shift. That is, the rotation mechanism 23 exerts a lock function of preventing the rotation of the single-shaft drive reduction gear 17. After the positioning by tightening the lock nuts 27, 27, the fastening means 18 may be fastened.

On the other hand, in the state shown in FIG. 7 in which the main valve body 2 is held at the fully closed position,
Despite the fact that the seating pressure is too large than the proper value, it is confirmed that it is difficult to open the main valve body 2 with one operating shaft 40 despite the fact that the seating pressure is too large. Then, similarly to the above, the fastening of the fastening means 18 composed of a plurality of bolts is loosened to a non-fastened state, and the lock nuts 27, 27 are loosened.
After the adjustment bolts 25A and 25B are made to be capable of moving forward and backward by rotation, the adjustment bolt 25A is retracted and the adjustment bolt 25B is advanced, whereby the single-axis drive reduction gear 17
Is slightly rotated about the axis C of the main shaft 4 indicated by the two-dot chain line arrow, and the mounting position is finely adjusted, the seating is properly corrected, and the main valve body 2 can be easily opened. When the seating is properly corrected, the lock nuts 27 and 27 may be tightened and the fastening means 18 may be fastened as described above.

It should be noted that the number of rotating mechanisms 23 is not limited to a pair of right and left, but may be one or three or more.

[0029]

As described above, according to the present invention, even if the seating is confirmed to be inappropriate, the fastening means is set in the non-fastened state,
After holding the fastening means so that it can be moved around the axis of the main shaft by the fastening means movement permitting part, by operating the rotating mechanism, the single-shaft drive reduction gear is rotated around the axis of the main shaft, and fine adjustment of the mounting position is performed. By doing so, the seating can be properly corrected easily and reliably.

[Brief description of the drawings]

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

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

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a plan view showing an example of a fastening means movement permitting section.

FIG. 5 is a front view showing a butterfly valve with a built-in auxiliary valve.

FIG. 6 is a side view of a butterfly valve with a built-in auxiliary valve, a part of which is shown in cross section.

FIG. 7 is a plan view showing the inside of the single-shaft drive speed reducer when the main valve and the sub-valve are closed.

FIG. 8 is a plan view showing the inside of the single-shaft drive speed reducer when only the sub-valve is opened.

FIG. 9 is a sectional view taken along line BB of FIG. 8;

FIG. 10 is a plan view showing the inside of the single-shaft drive speed reducer when the main valve and the sub-valve are opened.

FIG. 11 is a sectional view taken along line DD of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve box 2 Main valve body 3 Sub-valve element 4 Upper valve stem (main shaft) 7 Upper shaft support (shaft support) 8 Lower shaft support (shaft support) 14 shaft (sub shaft) 16 Stand 17 Single shaft drive reducer 18 Fastening Means 22 Fastening means movement permissible part 23 Rotation mechanism C Axis of main shaft BV V butterfly valve with built-in auxiliary valve

Claims (1)

[Claims] 1. A main valve body housed in a valve box so as to be openable and closable, an auxiliary valve body housed in the main valve body so as to be openable and closable, and the main valve body connected to each other by a shaft supporting portion of the valve box. The main shaft, which is rotatably and air-tightly supported around an axis and has a distal end protruding outside the valve box, is connected to the sub-valve, and is rotatably inserted into the main shaft along the axis of the main shaft. A countershaft having a distal end protruding outside the valve box; a stand provided on the valve box and penetrating the protruding portions of the main shaft and the countershaft outside the valve box; A butterfly valve with a built-in sub-valve, which is detachably fastened to the main shaft and a single-shaft drive speed reducer which is connected to the main shaft and the sub-shaft so as to be able to be decelerated by inserting the protruding portions outside the valve box. In the non-fastened state of the fastening means, the main A butterfly valve with a built-in auxiliary valve, comprising: a fastening means movement permitting portion capable of permitting movement of the shaft about the axis thereof; and a rotating mechanism for rotating the single-shaft drive reducer about the axis of the main shaft.