JP2001241566A - Operating apparatus for horizontal rotary valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operating apparatus for horizontal rotary valve in which a reduction gear is prevented from being submerged, a breakdown of the reduction gear due to submersion can be avoided and a reduction of volumetric capacity of a valve chamber can be attained. SOLUTION: A first lever 9 is mounted simultaneously rotatable on one end of a valve spindle 2 extended outside the valve casing 1 installed in the valve chamber 4, a second lever 10 is mounted simultaneously rotatable on speed reduced output shaft 7A of the reduction gear 7 installed on the upper floor 6 of the valve chamber 4, and the second lever 10 and the first lever 9 are connected movable with each other interlockingly through a pair of coupling rod 11, 11 extending vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for opening and closing a horizontal rotary valve such as a horizontal double-floor butterfly valve and a horizontal double-floor ball valve.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, a horizontal two-bed butterfly valve has a valve box 1 having a horizontal axis C2 perpendicular to the horizontal axis C1 so that a valve stem 2 is rotatable. The valve body 3 is attached to the valve stem 2 and is housed in the valve box 1 so as to be rotatable around the axis together with the valve stem 2, and the valve box 1 is opened and closed by the rotation. ing. In this type of horizontal two-bed butterfly valve, the valve box 1,
The valve body side including the valve stem 2 and the valve element 3 is installed in the valve chamber 4, and the valve element opening / closing means 5 is installed on the upper floor 6 of the valve chamber 4,
The horizontal output shaft of the speed reducer 7 is connected to one end of the valve stem 2 led out of the valve box 1 so as to be able to rotate simultaneously, and the vertical input water shaft of the speed reducer 7 and the vertical output shaft of the valve body opening / closing means 5 are connected. Are connected to each other via a connecting rod 8 extending vertically. In addition, 12 and 12 indicate piping, which are connected to both sides of the valve box 1.

In the opening / closing device for a horizontally placed two-floor type butterfly valve configured as described above, the valve body opening / closing means 5 is automatically or manually opened / closed to operate the valve body via the connecting rod 8, the speed reducer 7 and the valve rod 2. When the valve 3 is rotated 90 degrees from the fully closed position to the fully open position, the interval between the inner surface of the valve box 1 and the rotation trajectory of the outer periphery of the valve 3 increases as the rotation angle of the valve 3 increases.
The passage cross-sectional area of a fluid (a liquid such as water) is enlarged, and the flow rate can be increased. When the valve body 3 is rotated from the fully open position to the fully closed position by the above-described reverse operation, the interval between the inner surface of the valve box 1 and the rotation trajectory of the outer peripheral portion of the valve body 3 is reduced, and the cross-sectional area of the fluid passage is reduced. Is reduced to reduce the flow rate, and the flow rate can be set to “0” in the fully closed position. Therefore, from the state of the flow rate “0” where the valve body 3 is positioned at the fully closed position at the rotation angle of 0 °, the rotation angle of the valve body 3 is changed within the range of the flow rate “maximum” positioned at the fully open position at the rotation angle of 90 °. Accordingly, the flow rate through the pipe can be adjusted.

[0004]

However, in the above-described conventional opening / closing device for a two-bed butterfly valve, when the valve chamber 4 is submerged, the speed reducer 7 is also submerged. In the horizontal two-floor butterfly valve, the sliding portion between the valve box 1 and the valve rod 2 is sealed with high sealing performance so that even if the valve chamber 4 is submerged, the butterfly valve main body side remains. Has no effect. However, since the sealing performance of the speed reducer 7 is lower than the sealing performance of the butterfly valve body side, there is a possibility that a failure may occur due to water in the speed reducer 7 when the valve chamber 4 is submerged. Further, the direct connection structure in which the speed reducer 7 is connected to one end of the valve stem 2 led out of the valve box 1 has a disadvantage that a large-sized valve chamber 4 is required.

For this reason, as shown in FIG. 6, in the case of a two-floor type in which the valve body opening / closing means 5 is installed on the upper floor 6 of the valve chamber 4, the valve box 1 has the valve body 1 orthogonal to the horizontal axis C1. A valve stem 2 having a vertical axis C3 is rotatably supported by a shaft, and a valve body 3 is mounted on the valve stem 2 and housed in a valve box 1 rotatably around the axis together with the valve stem 2. A two-floor type butterfly valve is installed in the valve chamber 4, and the upper end of the valve rod 2 and a vertical output shaft (not shown) of the valve body opening / closing means 5 are connected vertically by a connecting rod 8.
Are connected so as to be interlocked with each other so as to avoid a failure of the speed reducer 7 due to flooding and to reduce the volume of the valve chamber 4.

However, in the case of the standing two-floor type butterfly valve, when the fluid passing through the valve box 1 is sewage or the like containing a relatively large amount of solid foreign matter, the lower end of the valve stem 2 is rotatably pivoted. The solid foreign matter intrudes and accumulates in the lower shaft sealing portion which is supported, hinders smooth rotation of the valve stem 2, and the valve body 3 by the valve body opening / closing means 5.
There is a possibility that the opening and closing operation of the device becomes difficult. This applies not only to the butterfly valve described above but also to a rotary valve such as a ball valve.

Therefore, the present invention relates to a rotary valve such as a horizontal two-bed butterfly valve or a horizontal two-bed ball valve which is not affected by passing fluid such as sewage containing a relatively large amount of solid foreign matter. Another object of the present invention is to provide a horizontal rotary valve opening / closing device capable of preventing the reduction gear from being submerged, avoiding the reduction gear from being damaged by water, and reducing the volume of the valve chamber. .

[0008]

To achieve the above object, an opening and closing device for a horizontal rotary valve according to the present invention is provided with a tubular valve box having a horizontal axis and a horizontal axis intersecting the horizontal axis. The valve stem is rotatably supported on a shaft, and a valve body attached to the valve stem is housed in a valve box so as to be rotatable around its axis together with the valve stem, and the rotation opens and closes the valve box. While, in a horizontal rotary valve installed in the valve chamber, one end of the valve stem is led out of the valve box,
A first lever is attached to this outlet so as to be able to rotate simultaneously,
A valve body opening / closing means having a speed reducer is installed on the upper floor of the valve chamber, and a second lever is attached to the speed reduction output shaft of the speed reducer so as to be simultaneously rotatable. The lever is characterized in that the levers are connected to each other via a connecting rod extending vertically so as to be interlockable.

According to the present invention, a valve body side of a horizontal two-bed type rotary valve having a cylindrical valve box, a valve rod, a valve body and the like is installed in a valve chamber, and a reduction gear is mounted on the valve chamber. Since the speed reducer can be installed on the floor, even if the valve room is submerged, the speed reducer can be prevented from being submerged, and a failure of the speed reducer due to flooding can be avoided. Further, since the speed reducer is installed on the upper floor of the valve chamber, the volume of the valve chamber can be reduced.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a view taken along the line AA of FIG. In addition,
4 to 6 are denoted by the same reference numerals and will be described.

1 and 2, the valve box 1 has a horizontal axis C2 perpendicular to the horizontal axis C1 and has a valve stem 2
Is rotatably supported, and a valve body 3 is attached to the valve stem 2 so that the valve body 1 is rotatable together with the valve stem 2 around its axis.
The valve box 1 is configured to be opened and closed by its rotation, and is installed in the valve chamber 4. One end of the valve stem 2 is led out of the valve box 1 in a watertight manner, and a first lever 9 is attached to this leading-out portion so as to be able to rotate simultaneously. A valve body opening / closing means 5 having a speed reducer 7 is provided on an upper floor 6 of the valve chamber 4.

On the other hand, a second lever 10 is attached to the horizontal reduction output shaft 7A of the reduction gear 7 so as to be able to rotate simultaneously.
Both ends of the lever 10 and both ends of the first lever 9 are connected to each other via a pair of connecting rods 11 extending vertically. That is, the first lever 9 and
A second link is formed by the second lever 10 and the pair of connecting rods 11, 11, and upper ends of the pair of connecting rods 11, 11 and both ends of the second lever 10 are connected to the connecting rods 11, 11, respectively.
Are connected to each other via an elongated hole 13 extending in the axial direction provided at the upper end portion of the first member. The connecting rods 11, 11 and both ends of the first lever 9 are rotatably connected. In the figure, 1
Reference numerals 2 and 12 denote pipes, which are connected to both sides of the valve box 1.

In the above configuration, the automatic or manual opening / closing operation force of the valve body opening / closing means 5 is controlled by the horizontal speed reduction output shaft 7 of the speed reducer 7.
A → the second lever 10 → the pair of connecting rods 11, 11 → the first lever 9 → the valve rod 3 is transmitted to the valve element 3 through the power transmission path to open and close the valve element 3. That is, the first lever 9, the second lever 10, and the pair of connecting rods 11, 11 are held in the position shown by the solid line in FIG. 1, and the valve body 3 is fully closed as shown by the solid line. Body opening and closing means 5
When the horizontal deceleration output shaft 7A of the speed reducer 7 is rotated clockwise by 90 degrees by the automatic or manual opening / closing operation force of the first lever 9, the first lever 9, the second lever 10, and the pair of connecting rods 11,
Numeral 11 indicates a state shown by a two-dot chain line, and the valve stem 2 rotates clockwise by 90 degrees to fully open the valve body 3 as shown by a two-dot chain line. In addition, the first lever 9 and the second lever
When the lever 10 and the pair of connecting rods 11 are held and the valve element 3 is fully opened as shown by the two-dot chain line, the speed reducer 7 is automatically or manually opened / closed by the valve element opening / closing means 5. When the horizontal deceleration output shaft 7A is rotated counterclockwise by 90 degrees, the first lever 9, the second lever 10, and the pair of connecting rods 11, 11 are in a state shown by a solid line,
The valve stem 2 rotates 90 degrees counterclockwise to fully close the valve body 3 as shown by the solid line.

When the valve body 3 is opened from the fully closed state to the fully open state, a pair of connecting rods 11, 1 are formed by the elongated holes 13 in FIG.
In the case where the right connecting rod 11 in FIG. 1 is free and does not act on it, and a tensile force acts on the left connecting rod 11 to close the valve body 3 from the fully open state to the fully closed state, the oblong hole is used. 13, the left connecting rod 11 of the pair of connecting rods 11, 11 is free and does not act on it, but a tensile force acts on the right connecting rod 11, and compressive stress is applied to the connecting rods 11. Does not occur. For this reason, even if the axial size of the connecting rods 11 and 11 becomes considerably long, the connecting rods 11 and 11 can be designed without considering buckling.

According to the present invention, the valve body side of a horizontal type butterfly valve having a cylindrical valve box 1, a valve stem 2, a valve body 3 and the like is installed in a valve chamber 4, and a speed reducer 7 is opened and closed. Since it is installed on the upper floor 6 of the valve room 4 together with the means 5, even if the valve room 4 is submerged, the speed reducer 7 is not submerged, and the speed reducer 7
Can be avoided. In addition, since the reduction gear 7 is installed on the upper floor 6 of the valve chamber 4, the volume of the valve chamber 4 can be reduced.

In the above embodiment, a pair of connecting rods 11,
11 is connected to both ends of the second lever 10 by the connecting rod 1.
Although the description has been made of a configuration in which the upper ends of the pair of connecting rods 11 and 11 are connected to each other via an elongated hole 13 extending in the axial direction provided at the upper end of the pair of connecting rods 11 and 11, as shown in FIG. Both ends of the lever 10 (however, only the upper end of one connecting rod 11 and one end of the second lever 10 are partially shown in FIG. 3) are connected to the connecting rods 11 and 11 by taper pins 14. A coupling member 17 rotatably attached to both ends of the second lever 10 via pins 16 with respect to the coupling 15 fixed to the upper end portion can slide in an amount corresponding to the axial sliding allowances h1 and h2. They may be fitted.

Further, in the above-described embodiment, a horizontal two-bed type butterfly valve has been described. However, the present invention is not limited to a horizontal two-bed type butterfly valve. It is applicable to rotary valves such as valves.

[0018]

As described above, the opening / closing device valve of the horizontal rotary valve according to the present invention is simultaneously rotatable with one end of a valve stem led out of a valve box installed in a valve chamber. One lever is attached, and a second lever is attached to a reduction output shaft of a reduction gear installed on the upper floor of the valve chamber so as to be rotatable at the same time, and the second lever and the first lever are connected via a connecting rod extending vertically. Since the speed reducer is immersed in the water, the speed reducer is not submerged even if the valve chamber is submerged, so that the speed reducer can be prevented from being broken down. Further, since the speed reducer is installed on the upper floor of the valve chamber, the volume of the valve chamber can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a view taken along the line AA of FIG. 1;

FIG. 3 is a cross-sectional view showing a modification of the connection structure between the upper end of the connecting rod and both ends of the second lever.

FIG. 4 is a configuration diagram of a conventional horizontally placed two-bed type butterfly valve.

FIG. 5 is a view taken in the direction of arrows BB in FIG. 4;

FIG. 6 is a configuration diagram of a conventional standing two-bed type butterfly valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve box 2 Valve stem 3 Valve body 4 Valve room 5 Valve body opening / closing means 6 Upper floor 7 Reduction gear 7A Horizontal output shaft of reduction gear (reduction output shaft of reduction gear) 9 1st lever 10 2nd lever 11 Connecting rod C1 Horizontal axis of valve box C2 Horizontal axis of valve stem

Claims (1)

[Claims] 1. A valve stem having a horizontal axis crossing the horizontal axis is rotatably supported on a cylindrical valve box having a horizontal axis,
The valve body attached to this valve stem is housed in a valve box so as to be rotatable around its axis together with the valve stem, and the rotation is used to open and close the valve box. In the rotary valve, one end of the valve stem is led out of the valve box, and the lead-out portion is rotatable simultaneously with the first.
A lever is mounted, a valve body opening / closing means having a speed reducer is installed on the upper floor of the valve chamber, and a second lever is mounted on the speed reduction output shaft of the speed reducer so as to be simultaneously rotatable,
An opening and closing device for a horizontal rotary valve, wherein the second lever and the first lever are connected to each other via a connecting rod extending in a vertical direction so as to be interlocked.