JP2001059576A - Sub-valve built-in type rotary valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically open and close a main valve element and a sub-valve based on a proper operation procedure, only by specifying a rotational direction merely of one valve-stem-sub-valve without taking an operation order into account. SOLUTION: A valve-stem-sub-valve 50 is rotated by 90 degree along a valve- opening direction, a sub-valve hole 53 of the sub-valve 50 and one-side valve holes 52A, 52B provided in a boss part 2A of a main valve element 2 are communicated thereby at first to open the sub-valve 50, and then a driven protrusion 51 in a main valve element 2 side is pressed with a drive protrusion 54 in the sub-valve 50 side by rotation of 90 degree along the valve-opening direction of the sub-valve 50 to open the main valve element 2. The sub-valve 50 is rotated by 90 degree from the condition therein to a valve-closing direction to retreat the sub-valve hole 53 of the sub-valve 50 from the one-side valve holes 52A, 52B, and then the driven protrusion 51 is pressed by the drive protrusion 54 to open the main valve element 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rotary valve with a built-in sub-valve, such as a butterfly valve with a built-in sub-valve or a ball valve with a built-in sub-valve.

[0002]

2. Description of the Related Art As shown in FIGS. 8 to 10, a butterfly valve with a built-in auxiliary valve has a valve box 1 having both ends opened in the direction of the axis Cx, and a main valve housed in the valve box 1 so as to be opened and closed. Body 2
And a sub-valve 3 housed in the main valve 2 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 Cy. The upper valve stem 4 is rotatably and airtightly supported around the axis Cy by the upper shaft support 7 of the valve box 1 and is disposed above the upper shaft support 7. It is protruding. The lower valve stem 5 is rotatably and airtightly supported around the axis Cy by the lower shaft supporting portion 8 of the valve box 1, and the upper valve stem 4 and the lower valve stem 5 rotate in the forward and reverse directions around the axis Cy. The main valve body 2 opens and closes the passage of the valve box 1.

An upper valve stem 9 and a lower valve stem 10 are fixed to the sub-valve body 3, and the upper valve stem 9 is rotatable about an axis Cy by an upper shaft support 12 of an auxiliary valve box 11 provided on the main valve body 2. And is airtightly supported and protrudes above the upper shaft support 12. The lower valve stem 10 has an axis C
It is rotatable around y and airtightly supported.

A shaft 14 having an upper end protruding above the upper valve stem 4 is rotatably inserted through a through hole 6 provided in the upper valve stem 4 of the main valve body 2 in the direction of the axis Cy. The lower end of the shaft 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.
For rotating two axes of the upper valve rod 4 and the shaft 14 on the side of the sub-valve body 3, and has a first axis having a concentric axis with the axis Cy.
A gear case 20 and a second gear case 21 attached to one side of the first gear case 20. The lower end of the first gear case 20 is fixed to the stand 16, and the upper end opening of the first gear case 20 has a cover 22. It is removably closed by.

The one operating shaft 18 is connected to the upper valve rod 4 of the main valve body 2.
11 is rotated in the forward and reverse directions around the axis Cy. As shown in FIGS. 11 and 12, a shaft support portion 23 provided at one end of the second gear case 21 is rotatable and airtight around the axis C1. The operation shaft 18 is supported and protrudes above the shaft support portion 23, and the rotation of the one operation shaft 18 about the axis C1 is caused by a horizontal worm through a gear train 24 such as a bevel pinion 24A, a bevel gear 24B, a pinion 24C, and a spur gear 24D. The rotation of the worm shaft 25 is transmitted to a worm wheel 27 having an axis concentric with the axis Cy through a worm 26 provided on the worm shaft 25. The worm wheel 27 is fixed to a wheel boss 28 rotatably supported around the axis Cy by the first gear case 20 and the cover 22, and the upper end of the upper valve stem 4 of the main valve body 2 is inserted into a center hole 28 </ b> A of the wheel boss 28. 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 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 airtightly supported around an axis Cy by a stem cover 29 which removably 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 Cy, 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 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. The rotation operation must be performed in the valve opening or valve closing direction in the order described above, which has a disadvantage that the operation is troublesome. Further, if the operation sequence is incorrect, the operation force at the time of opening and closing the valve is significantly increased, and smooth opening and closing of the valve are prevented. In addition, even when the sub-valve is in the open state, the sub-valve itself is present in the sub-valve to prevent the passage of fluid, and has a complicated structure.

Therefore, according to the present invention, the main valve body and the sub-valve are opened and closed based on an appropriate sequence simply by specifying the rotation direction of one valve stem sub-valve without considering the operation sequence. A sub-valve capable of facilitating operation and avoiding an erroneous operation sequence by obtaining a valve-open state of the sub-valve body that does not hinder the passage of fluid, and further achieving a simplified structure. It is intended to provide a built-in rotary valve.

[0017]

In order to achieve the above object, a rotary valve with a built-in auxiliary valve according to the present invention includes a valve box 1 and a first axis Cx of the valve box 1 inside the valve box 1. The main valve body 2, which is rotatably accommodated for rotation about the intersecting second axis Cy and opens and closes the valve box 1 and has valve holes 52 </ b> A and 52 </ b> B provided in a center boss portion 2 </ b> A, and the main valve body 2. Center boss 2A
The auxiliary valve hole 5 is rotatably inserted around the second axis Cy and can communicate with the valve holes 52A and 52B.
And a valve stem sub-valve 50 provided with the valve stem 3.
0, a driving projection 54 is provided on the outer surface of the center boss 2.
A driven projection 51 which can interfere with the driving projection 54 on the inner surface of A
The main valve body 2 closes the valve box 1 and the sub-valve hole 53 is retracted from the valve holes 52A, 52B. When the auxiliary valve 50 is rotated by 90 degrees around the second axis Cy in the valve opening direction, the auxiliary valve hole 5 is rotated.
3 is communicated with the valve holes 52A and 52B, so that only the valve stem sub-valve 50 is opened, and from the valve-open state of only the valve stem sub-valve 50, the valve of the valve stem sub-valve 50 around the second axis Cy. Opening direction 90
The valve stem auxiliary valve 50 in which the auxiliary valve hole 53 communicates with the valve holes 52A and 52B due to the interference of the driving projection 54 with the driven projection 51 by the degree rotation.
And the main valve body 2 with the main valve body 2 opened the valve box 1 is opened, and the valve stem sub-valve 50 and the main valve body 2 are opened, so that the valve stem sub-valve 50 When the auxiliary valve hole 53 is retracted from the valve holes 52A and 52B by the 90-degree rotation around the second axis Cy in the valve closing direction, the main valve body 2 in which the valve rod sub valve 50 is closed and the main valve element 2 opens the valve box 1 is closed. Only when the main valve body 2 is opened, the valve stem auxiliary valve 50 is rotated by 90 degrees around the second axis Cy in the valve closing direction by 90 degrees. The main valve body 2 closes the valve box 1 and the sub valve hole 53
The lengths of the driving projection 54 and the driven projection 51 in the circumferential direction are set so that the main valve body 2 and the valve stem sub-valve 50 which are retracted from the valve holes 52A and 52B can return to the closed state. It is characterized by:

According to the present invention, when the main valve body and the valve stem sub-valve are closed, the valve stem sub-valve is moved 180 degrees in the valve opening direction around the second axis.
By rotating the valve, the valve stem sub-valve alone can be opened first, and then the valve stem sub-valve and main valve body can be opened. By rotating the valve stem sub-valve by 180 degrees in the valve closing direction about the second axis from the valve-open state of the main valve body and the valve stem sub-valve, first, only the valve stem sub-valve is closed, and then The main valve can be closed.

[0019]

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 a butterfly valve with a built-in sub-valve in the same manner as in the prior art. Note that the same or corresponding parts as in the conventional example are denoted by the same reference numerals and described. FIG.
1 is an overall front view showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a main valve body and a valve stem auxiliary valve. In these figures, a main valve body 2 is housed inside a valve box 1 having both ends opened in the horizontal first axis Cx direction so as to freely rotate around a vertical second axis Cy perpendicular to the first axis Cx. Thus, the valve box 1 is opened and closed.

The central boss 2A of the main valve body 2 has a vertical second
The valve stem sub-valve 50 extending in the axis Cy direction is a vertical second axis Cy.
It can be freely rotated around. The valve stem sub-valve 50 has the functions of the upper valve stem 4, the lower valve stem 5, and the sub-valve element 3 in the butterfly valve with a built-in sub-valve described in the conventional example. Opening / closing device (not shown) via a coupling means such as a coupling.
Linked to

As shown in FIGS. 2 and 3, on the inner surface of the central boss portion 2A of the main valve body 2, one driven projection 51 functioning as a follower has a radial length of 1/2 in the circumferential direction. Projecting toward the inside in the semi-circular shape and extending in the direction of the second vertical axis Cy, and protruding from the center of the driven projection 51 in the circumferential direction and orthogonal to the second vertical axis Cy. One of the valve holes 52A centered on the horizontal axis Cx1 is provided through the center boss 2A, and the other valve hole 52B opposed to the one valve hole 52A has the driven protrusion 51 and the center boss 2A.
A is provided.

The outer radius of curvature of the valve stem sub-valve 50 is set slightly smaller than the inner radius of curvature of the driven projection 51 projecting in a semicircle, and is located near the center of the vertical second axis Cy. A sub-valve hole 53 centering on a horizontal axis Cx2 orthogonal to the second axis Cy is provided therethrough. Further, at two positions above and below the sub-valve hole 53 on the outer surface of the valve stem sub-valve 50, driving projections 54 functioning as motors have a length of 1/4 in the circumferential direction and extend outward in the radial direction. And extends short in the direction of the second vertical axis Cy to protrude from the sub-valve hole 53. In the figure, reference numeral 55 denotes an auxiliary valve seat, which is detachably attached to one of the valve holes 52A. The inner end face of the sub-valve seat 55 is provided with the valve stem sub-valve 5.
Sliding contact is made with the outer periphery of 0 to prevent leakage from the auxiliary valve hole 53.

Next, the main valve body 2 and the valve stem sub-valve 50 are fully closed.
The procedure for fully opening the valve stem auxiliary valve 50 will be described. As shown in FIG. 4, the valve box 1 is closed by the main valve body 2,
When the sub-valve 53 provided in the valve stem sub-valve 50 is retracted from the one valve hole 52A and the other valve hole 52B, the main valve body 2 and the valve stem sub-valve 50 in the valve closed state, the opening / closing device not shown. When the valve stem sub-valve 50 is rotated clockwise by 90 degrees by manual operation or automatic operation of the valve stem, as shown in FIG. 5, the valve stem with the sub-valve hole 53 communicating with one valve hole 52A and the other valve hole 52B. The valve open state of only the sub valve 50 is obtained. In other words, in the conventional butterfly valve with a built-in sub-valve, the sub-valve 3 is present in the sub-valve 11 in the state where only the sub-valve 3 is opened to prevent the passage of fluid. In such a butterfly valve with a built-in sub-valve, when the sub-valve hole 53, the one valve hole 52A and the other valve hole 52B communicate with each other, the valve rod sub-valve 50 in a valve-open state prevents the passage of fluid into the passage. Does not exist, it is possible to obtain the valve-open state of the valve stem sub-valve 50 which is excellent in flow characteristics without obstructing the passage of the fluid.

When the valve stem auxiliary valve 50 is further rotated clockwise 90 degrees from the valve-open state of only the valve stem auxiliary valve 50, the driving projection 54 presses the driven projection 51 in the clockwise direction, and the main valve body 2 is moved. Rotate 90 degrees clockwise, as shown in FIG. 6, the auxiliary valve hole 53 communicates with the one valve hole 52A and the other valve hole 52B, and the main valve body 2 opens the valve box 1, ie, the valve stem The valve opening state of the sub valve 50 and the main valve body 2 is obtained.

When the valve stem sub-valve 50 is rotated counterclockwise by 90 degrees from the valve-opened state of the valve stem sub-valve 50 and the main valve body 2, the sub-valve hole 53 becomes one of the two as shown in FIG. Withdrawing from the valve hole 52A and the other valve hole 52B, the valve opening of only the main valve body 2 in which the main valve body 2 opens the valve box 1 is obtained.

As shown in FIG. 7, when the valve stem auxiliary valve 50 is further rotated counterclockwise by 90 degrees from the valve open state of the main valve body 2 alone, the driving projection 54 presses the driven projection 51 counterclockwise. The main valve body 2 is rotated counterclockwise by 90 degrees, and the state shown in FIG. 1, that is, the valve box 1 is closed by the main valve body 2, and the sub-valve hole 53 provided in the valve stem sub-valve 50 has one valve hole. 52A and the main valve body 2 and the valve stem auxiliary valve 5 retracted from the other valve hole 52B.
The valve returns to the zero valve closed state.

As described above, the rotation direction of the valve stem auxiliary valve 50 is simply specified without considering the opening and closing operation sequence of the main valve body 2 and the valve stem auxiliary valve 50, and the main valve is determined based on the opening and closing operation sequence. Since the body 2 and the valve stem sub-valve 50 can be opened and closed, when the valve of the main valve body 2 and the sub-valve body 3 is opened and closed as in a conventional two-axis rotating device having two operation shafts, Each time, it is not necessary 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 is not erroneously performed.
In addition, since the valve stem sub-valve 50 can be opened without obstructing the passage of the fluid, the valve stem sub-valve 5 can be compared with the prior art.
The flow characteristics when the zero valve is open are improved. Further, the structure can be greatly simplified.

In the above embodiment, the rotary valve with a built-in sub-valve according to the present invention is described using a butterfly valve with a built-in sub-valve. However, the present invention is not limited to the butterfly valve with a built-in sub-valve. Instead, the present invention can be applied to a device that rotates a ball valve or two members rotating about an axis in a specified order in a forward direction and a reverse direction.

[0029]

As described above, according to the present invention, the opening / closing operation sequence is determined simply by specifying the rotation direction of the valve stem sub-valve without considering the opening / closing operation sequence of the main valve body and the valve stem sub-valve. Can open and close the main valve body and the valve stem sub-valve based on the above. Therefore, like the conventional two-shaft rotary device having two operation shafts, when the valve of the main valve body and the sub-valve body is opened and closed, Each time,
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. In addition, since the valve stem sub-valve can be opened without obstructing the passage of fluid, the flow characteristic when the valve stem sub-valve is opened is improved as compared with the conventional example. Further, the structure can be greatly simplified.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view showing a main valve body and a valve stem auxiliary valve.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is a plan view of the main valve body and the valve stem sub-valve when the valves are closed.

FIG. 5 is a plan view showing a state where only a valve stem auxiliary valve is opened.

FIG. 6 is a plan view of the main valve body and the valve stem sub-valve when the valve is opened.

FIG. 7 is a plan view showing a valve opening state of a main valve body and a valve closing state of a valve stem auxiliary valve.

FIG. 8 is a front view showing a conventional butterfly valve with a built-in auxiliary valve.

FIG. 9 is a plan view of FIG.

FIG. 10 is a side view of FIG. 8;

FIG. 11 is an enlarged sectional view taken along line DD of FIG. 9;

FIG. 12 is an enlarged sectional view taken along line EE in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve box 2 Main valve body 2A Center boss part 50 Valve stem sub-valve 51 Follower projection 52A One valve hole (valve hole) 52B The other valve hole (valve hole) 53 Secondary valve hole 54 Driving projection Cx 1st axis Cy 2 axis

Claims (1)

[Claims] 1. A valve box, wherein the valve box is rotatably accommodated in the valve box around a second axis intersecting the first axis of the valve box to open and close the valve box.
A main valve body provided with a valve hole in a center boss portion, and a sub-valve hole through which the center boss portion of the main valve body can freely rotate around the second axis and can communicate with the valve hole. A driving projection is provided on an outer surface of the valve stem sub-valve, and a driven projection that can interfere with the driving projection is provided on an inner surface of the center boss portion, and the main valve body is provided. When the main valve body and the valve stem sub-valve close the valve box and the sub-valve hole is retracted from the valve hole, the valve stem sub-valve is rotated by 90 degrees in the valve opening direction around the second axis from the valve closed state. The valve opening of only the valve stem sub-valve in which the subsidiary valve hole communicates with the valve hole is obtained.
The valve stem of the valve stem sub-valve with the sub-valve communicating with the valve hole due to the interference of the driving projection with the driven projection by rotation of the driven projection by 90 degrees around the axis, and the main valve with the main valve body opening the valve box The valve stem sub-valve is retracted from the valve hole by rotating the valve stem sub-valve 90 degrees around the second axis in the valve closing direction by 90 degrees from the valve-open state of the valve stem sub-valve and the main valve body. The valve is closed and the main valve body opens the valve box, so that only the main valve body is opened. From the valve open state of only the main valve body, the valve closing direction 90 around the second axis of the valve stem auxiliary valve is obtained. The main valve body closes the valve box and the sub-valve hole can be returned to the valve-closed state of the main valve body and the valve rod sub-valve retracted from the valve hole by the interference of the driving protrusion with the driven protrusion by the degree rotation. The driving valve and the driven protrusion have circumferential lengths set therein, and the rotary valve has a built-in auxiliary valve.