JP2000193103A - Opening/closing device of rotary valve having auxiliary valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a subject device with a self-locking function, and capable of selectively rotating a main valve shaft and an auxiliary valve shaft by one opening shaft, outside of a gear mechanism. SOLUTION: An auxiliary valve element 4 and a main valve element 2 are independently rotated by an auxiliary valve shaft 5 and a main valve shaft 3, respectively. When an opening shaft 11 is rotated, a drive tube 13 ascends and descends, and tubes 14, 15, which are integral with the main valve shaft 3 and the auxiliary valve shaft 5, respectively, rotate by sliding movement of a pin 16, which is fixed to the tube 13, within guide grooves 18, 19. In order words, the guide grooves 18, 19 have a vertical part and a spiral part, and the tubes 14, 15 do not rotate when the pin 16 is at the vertical part, while when the pin 16 is at the spiral part, upon ascent and descent of the pin 16 accompanied with the ascent and descent of the tube 13, the tubes 14, 15 rotate via the guide grooves 18, 19 so as to open and close the valve elements 2, 4. The operating shaft 11 and the drive tube 13 are threadedly connected so that the operating shaft 11 is not rotated by vertical force of the drive tube 13, and self-locking at a desired opening/closing position of the valve elements 2, 4 is implemented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device for a rotary valve with a sub-valve, in which a sub-valve is provided at the center of a main valve and both valves are rotated by one operating shaft to open and close the valve. Things.

[0002]

2. Description of the Related Art A rotary valve with a sub-valve will be described with reference to FIGS.
The main valve body 2 is provided therein, and the main valve shaft 3 is guided to the outside of the valve box 1, and the sub valve body 4 is provided at the center of the main valve body 2, and the sub valve shaft 5 penetrates the main valve shaft 3. The two valve shafts 3,
By selectively turning 5, the main valve 2 and the sub-valve 4 are selectively rotated to open and close the valve.

For example, as shown in FIG. 5 (c), the valve V is completely closed by closing both valve bodies 2, 4, and when the valve is opened, first, as shown in FIG. Release body 4,
Subsequently, the main valve body 2 is opened as shown in FIG.
At the time of opening, the main valve element 2 is opened by opening the auxiliary valve element 4 in advance.
Is easy to open (see FIG. 7C). On the other hand, when the valve is closed, first, the main valve body 2 is closed with the sub-valve element 4 open, and then the sub-valve element 4 is closed. At this time, since the main valve is closed while the sub-valve is open, the water hammer pressure is greatly reduced even if the valve is rapidly closed. Further, the flow rate can be finely adjusted according to the degree of opening and closing of the sub-valve.

In many of the rotary valves V with a sub-valve, the main valve shaft 2 and the sub-valve shaft 4 are respectively rotated by different operation shafts. The technology (valve opening / closing device) performed with the operating shaft is Japanese Patent Publication 4-201.
No. 08 publication. The valve opening and closing device is
The intermittent engagement of the toothless gear causes the main and sub valves to open and close, and also performs self-locking.

[0005]

The above-mentioned conventional valve opening / closing device using one operating shaft has a gear meshing system.
The gears are provided in parallel, and have a large bulk. Further, since the self-locking function needs to be performed with a configuration different from the meshing of the gears, the structure is complicated, which causes an increase in cost in terms of machining and assembly.

An object of the present invention is to enable a single operating shaft to rotate a main valve shaft and a sub-valve shaft with a self-locking function without using a gear mechanism.

[0007]

In order to solve the above-mentioned problems, the present invention first raises and lowers a valve shaft operating drive tube by screwing and rotating an operation shaft, and obtains a self-locking function by the screw connection. It was.

Next, according to the present invention, a combination of a main valve shaft rotating tube, a sub valve shaft rotating tube, and the above-mentioned driving tube is used to raise and lower the driving tube and to rotate both tubes via a linear / rotation converting means. Drive tube)
Is rotated to rotate the main valve shaft or the sub valve shaft. Tubes can be easily made to have the same axial center, and can be fitted in the radial direction so as to be compact.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention include:
By providing a sub-valve at the center of the main valve, penetrating the sub-valve of the sub-valve to the main valve shaft of the main valve, and selectively turning both valve shafts, the main valve and In an opening and closing device for a rotary valve with a sub-valve that selectively rotates a sub-valve, an operation shaft is rotatably supported by a casing fixed to a valve box and inserted into the casing, and a driving tube,
The main valve drive tube and the auxiliary valve drive tube are provided on the same axis, and the drive tube is movable only in the axial direction of the casing, and is screwed with the operation shaft to move up and down by rotation of the operation shaft. The main valve drive tube is rotatable around its axis and connected to the main valve shaft, and the sub valve drive tube is rotatable around its axis and connected to the sub valve shaft. A means is provided between the drive tube and the main valve drive tube and the auxiliary valve drive tube for converting the elevation of the drive tube into rotation of both drive tubes. After turning the sub valve drive tube to open the sub valve, the main valve drive tube is rotated to open the main valve, and when the valve is closed, the main valve drive tube is turned. After closing the main valve Te, it may be employed a configuration in which closing the auxiliary valve by rotating the sub-valve drive tube.

As a specific configuration of the conversion means, the tubes overlap one another in the radial direction, and the driving tubes are movably fitted in the respective guide grooves of the main valve drive tube and the sub-valve drive tube in the length direction thereof. A guide pin is provided, and both guide grooves are composed of a vertical part in the vertical direction and an inclined part extending in the vertical direction from one end of the guide pin. When the one pin is in the vertical part of one guide groove, the other pin Is in the inclined portion of the other guide groove, and when one pin is in the inclined portion of one guide groove, the other pin is in the vertical portion of the other guide groove, and each pin is in the inclined portion of the guide groove. In this case, it is possible to adopt a configuration in which both drive tubes are rotated by the sliding contact between the pins and the guide grooves by raising and lowering the drive tubes.

In each of the above constructions, if a stopper for fully opening and closing the main valve is provided between the casing and the main valve drive tube, positioning at the time of full opening or full closing can be performed without considering the rotation speed of the operating shaft. Can be performed accurately.

Further, the sub-valve shaft is rotatably fitted to the sub-valve drive tube around its axis, and the sub-valve shaft and the sub-valve drive tube are integrated by a friction type fastening ring. Loosen the fastening ring, adjust the circumferential fitting position of the auxiliary valve shaft and the auxiliary valve drive tube, adjust the opening / closing error between the main valve and the auxiliary valve, and tighten the fastening ring when the adjustment is completed. To integrate the secondary valve shaft and the secondary valve drive tube.
At this time, since the fastening ring is of a friction type, the adjustment position can be changed linearly, there is no key alignment, etc., and assembling is easy, and highly accurate adjustment can be performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. 1 to 7 and relates to a butterfly valve device with a built-in auxiliary valve as described above. A body 2 is provided to guide the main valve shaft 3 out of the valve box 1, and a sub-valve 4 is provided at the center of the main valve body 2, and a sub-valve 5 penetrates the main valve shaft 3. In the figure, 6 is a main valve seat and 7 is a sub valve seat.

A casing 10 of the opening / closing device A is bolted to the upper surface of the valve box 1, and an operation 11 having the same axis as the valve shafts 3, 5 is inserted from the upper wall of the casing 10, and a bearing 1 is provided.
2 rotatably supported. The casing 10 is provided with a drive tube 13, a main valve drive tube 14, and a sub-valve drive tube 15 that are radially overlapped on the same axis. The drive tube 13 is connected to the operation shaft 1.
1 goes up and down by the rotation of the operation shaft 11 through the screw. Pins 16, 16 are protruded at target positions on the side surface of the drive tube 13. The number and position of the pins 16 are arbitrary, but preferably equally spaced in the circumferential direction.

The pins 16 are slidably fitted in guides (grooves) 17 formed on the inner surface of the casing 10, and the fitting allows the drive tube 13 to move up and down without rotating. The pin 16 slidably penetrates the guide groove 18 of the main valve drive tube 14 and slidably fits in the guide groove 19 of the sub-valve drive tube 15. As shown in FIGS. 5A to 7B, the guide grooves 18 and 19 respectively extend vertically from spiral portions (inclined portions) 18a and 19a and one end thereof. The vertical portion 19b of the main valve drive tube 14 and the spiral portion 18a of the auxiliary valve drive tube 15 are the same in the vertical length, and the spiral portion 19a and the vertical portion 18b are the same. It has become. Thereby, at the time of opening / closing operation of the valve described later, after the sub-valve element 4 is opened, the main valve element 2 is opened, and conversely,
After the main valve element 2 is closed, the sub-valve element 4 acts to close.

A main valve drive sleeve 20 is connected to the main valve drive tube 14 by a spline connection 20a, and this sleeve 20 is connected to the main valve shaft 3 by a key connection 20b.
Is joined to. Therefore, the main valve drive tube 1
The rotation of 4 opens and closes the main valve body 2 via the sleeve 20 and the main valve shaft 3. Protrusions 21a and 21b are formed on the side surface of the main valve drive tube 14. As shown in FIG. 4A, when one of the protrusions 21a abuts on one of the adjusting bolts 22a of the casing 10, the main valve drive tube 14 has a main body. Valve 2
Is completely closed, and the other projection 21b abuts on the other adjustment bolt 22b as shown by the chain line in the figure, whereby the fully open state of the main valve body 2 is positioned.
That is, the protrusions 21a, 21b and the bolts 22a, 22b
This forms a positioning stopper for fully opening and fully closing the main valve. The fully closed position and the completely open position are adjusted by adjusting the degree of protrusion of the adjustment bolts 22a and 22b.

The drive sleeve 23 is connected to the auxiliary valve drive tube 15 by a spline connection 23a.
The sleeve 23 is rotatably fitted to the auxiliary valve shaft 5. Friction type fastening ring 24 between sleeve 23 and sub-valve shaft 5
The fastening ring 24 is screwed with a bolt to press the two rings 23 and 5 together to unite the two by frictional force. Therefore, this fastening ring 24
To adjust the circumferential fitting position between the sub-valve shaft 5 and the sleeve 23 to adjust the opening / closing error between the main valve body 2 and the sub-valve 4;
When the adjustment is completed, the fastening ring 24 is tightened so that
Are integrated.

This embodiment has the above-described structure. In the valve closed state shown in FIG.
When the operation shaft 11 is rotated from this state and the drive tube 13 is lowered, the pin 16 slides in the guide grooves 18 and 19 as shown by the chain line in FIG. At this time, the pin 1
6 is in the spiral portion 19a of the guide groove 19, and as the drive tube 13 descends, the auxiliary valve drive tube 1
5 rotates to the left (clockwise). On the other hand, on the main valve drive tube 14 side, since the pin 16 is located at the vertical portion 18b of the guide groove 18, the main valve drive tube 14 remains stationary without receiving a rotational force. That is, only the sub-valve 4 rotates and the sub-valve is opened, the main valve 2 remains closed, and the main valve is not opened.

Next, as shown in FIG. 6, the pins 16 are connected to the spiral portions 18a, 19a of the guide grooves 18, 19 and the vertical portions 1a.
8b and 19b, the sub-valve element 4 is completely opened, and from this state, when the drive tube 13 is further lowered, the pin 16 on the side of the sub-valve drive tube 15 as shown by the chain line in FIG. Since it is located at the vertical portion 19b of the guide groove 19, the sub-valve drive tube 15 does not receive a rotational force, and the sub-valve 4 is kept open. On the other hand, on the main valve drive tube 14 side, the pin 16 is
The main valve drive tube 14 rotates to the left (clockwise) as the drive tube 13 descends because it is in the spiral portion 18a. That is, only the main valve element 2 rotates to open the main valve, and the sub-valve element 4 maintains the open state. Eventually,
When the pin 16 reaches the lower ends of the guide grooves 18 and 19, the main valve body 2 is completely opened as shown by the solid line in FIG.

From this open state, if the operating shaft 11 is reversed and the drive tube 13 is raised, the valve is closed by the reverse action. That is, first, the main valve body 2 closes, and then the sub-valve body 4 closes.

In the open / close state of these valves V, the valve shafts 3 and 5, ie, the main and auxiliary valve drive tubes 14 and 15 try to rotate due to the fluid pressure acting on each valve body 2 and 4.
The force acts on the drive tube 13 via the guide grooves 18, 19 and the pin 16, but the drive tube 13 cannot rotate, so that the valve bodies 2, 4 cannot move and are self-locked.

FIG. 8 shows an embodiment in which a speed reducer 30 is provided on the operation shaft 11. This speed reducer 30 has its own operation shaft 31 and the operation shaft 11 connected by a reduction gear mechanism 32. The shaft 31 allows the valve shafts 3 and 5 to be rotated with a small force to open and close the valves.

In the embodiment, one pin 16 also serves as a pin fitted into each of the guide grooves 18 and 19 of both drive tubes 14 and 15, but a pin fixed to the drive tube 13 is attached to both tubes 14 and 15. 15 guide grooves 1
8 and 19 may be fitted respectively. In this case, the guide grooves 18 and 19 can be shifted up and down.
Further, the drive tube 13 may be located outside the main valve drive tube 14.

The operating shaft 11 of the opening / closing device A and the axes of the tubes 13, 14, 15 are the same.
The drive tube 13 can be moved up and down even if it is not coaxial with the tube 13 or the like but is eccentric, and the effect of the present invention can be obtained. In addition, the axis of the opening / closing device A (the axis of the tube 13 or the like) and the axis of the main valve shafts 3 and 5 can be displaced from each other. In this case, the two are connected by a gear mechanism or the like. Further, a fastening ring 24 is interposed between the main valve drive sleeve 20 and the main valve shaft 3 so as to adjust an opening / closing error between the main valve body 2 and the sub-valve element 4 between the two. If you get.

[0025]

According to the present invention, the main valve shaft and the sub-valve shaft can be rotated by one operating shaft without using a gear mechanism. Therefore, special processing such as gear processing is unnecessary, and the invention is inexpensive. Becomes In addition, since it has a self-locking function, a self-locking mechanism such as a worm deceleration mechanism is not required, and compactness can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment.

FIG. 2 is an enlarged view of a main part of the embodiment.

FIG. 3 is an exploded perspective view of a main part of the embodiment.

4A is a sectional view taken along line XX of FIG. 2, and FIG.
-Y line sectional view

5A and 5B are explanatory diagrams of the operation of the embodiment, in which FIG. 5A is a sub valve drive tube portion, FIG. 5B is a main valve drive tube portion,
(C) is the valve body

FIGS. 6A and 6B are explanatory diagrams of the operation of the embodiment, in which FIG. 6A is an auxiliary valve drive tube portion, FIG.
(C) is the valve body

FIGS. 7A and 7B are explanatory diagrams of the operation of the embodiment, in which FIG. 7A is a sub-valve drive tube portion, FIG.
(C) is the valve body

FIG. 8 is a sectional view of a main part of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve box 2 Main valve body 3 Main valve shaft 4 Sub valve body 5 Sub valve shaft 10 Casing of opening and closing device 11 Operating shaft 13 Drive tube 14 Main valve drive tube 15 Sub valve drive tube 16 Pin 17 Pin guide 18 Main valve drive tube Side guide groove 18a Spiral portion (inclined portion) of the same guide groove 18b Vertical portion of the same guide groove 19 Secondary valve drive tube side guide groove 19a Spiral portion of the same guide groove (inclined portion) 19b Vertical portion of the same guide groove 20 Main valve Drive sleeve 21a, 21b Protrusion for stopper 22a, 22b Adjustment bolt for stopper 23 Drive sleeve for auxiliary valve 24 Friction type fastening ring A Opening / closing device V Rotary valve with auxiliary valve

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H052 AA02 BA25 BA35 CA13 CD09 EA02 3H063 AA02 BB18 BB32 CC03 CC06 DA02 DB23 EE12 FF09 GG06

Claims (4)

[Claims] An auxiliary valve element is provided at the center of a main valve element, and a main valve axis of the main valve element penetrates an auxiliary valve axis of the auxiliary valve element. , 5 is selectively rotated to rotate the main valve body 2 and the sub-valve element 4 selectively.
The operating shaft 11 is rotatably supported by a casing 10 fixed to the valve box 1 and inserted into the casing 10, and a driving tube 13 and a main valve drive tube 14 are provided in the casing 10. And the auxiliary valve drive tube 15 is provided on the same axis. The drive tube 13 is movable only in the axial direction of the casing 10, and is screwed with the operation shaft 11 to move up and down by rotation of the operation shaft 11. The main valve drive tube 14 is rotatable about its axis and connected to the main valve shaft 3, and the sub-valve drive tube 15 is rotatable about its axis so as to rotate. The drive tube 13 is connected to the auxiliary valve shaft 5, and is provided between the drive tube 13 and the main valve drive tube 14 and the auxiliary valve drive tube 15.
Means for converting the elevation of the drive tube into rotation of the drive tubes 14 and 15 is provided. When the valve is opened, the drive valve 15 is rotated to open the sub valve,
Rotate the main valve drive tube 14 to open the main valve,
When the valve is closed, the main valve drive tube 14 is rotated to close the main valve, and then the sub valve drive tube 15 is rotated to close the sub valve. . 2. The tubes 13, 14, and 15 overlap in the radial direction, and the drive tubes 13 move in the guide grooves 18 and 19 of the main valve drive tube 14 and the sub-valve drive tube 15 in the length direction thereof. A guide pin 16 which fits freely is provided, and both guide grooves 18 and 19 thereof are provided.
Consists of vertical portions 18b, 19b in the vertical direction and inclined portions 18a, 19a extending in the vertical direction from one end thereof. When the one pin 16 is in the vertical portion 18b of the one guide groove 18, the other pin 16 Is in the inclined portion 19a of the other guide groove 19, and one pin 16 is
When the other pin 16 is in the vertical portion 19b of the other guide groove 19,
When the drive tube 13 is moved up and down when the pins 6 are in the inclined portions 18a and 19a of the guide grooves 18 and 19,
The opening / closing device for a rotary valve with a sub-valve according to claim 1, wherein the conversion means is formed by rotating the rotation of the rotation valves (4, 15). 3. A stopper 21a for fully opening and closing the main valve between the casing 10 and the main valve drive tube 14.
The opening / closing device for a rotary valve with a sub-valve according to claim 1 or 2, wherein 21b, 22a, and 22b are provided. 4. The sub-valve shaft 5 is connected to the sub-valve drive tube 1.
4. A sub-valve shaft (5) and a sub-valve drive tube (15) are rotatably fitted to the shaft (5) so as to be integrated with each other by a friction type fastening ring (24). An opening and closing device for a rotary valve with an auxiliary valve according to any one of the first to third aspects.