JP5911698B2 - Rotary valve with actuator - Google Patents

Description

  The present invention relates to a rotary valve with an actuator, and more particularly, to a mounting structure for a small motor-operated valve that can be incorporated in a device or the like and is excellent in compactness.

Conventionally, for example, an electric ball valve disclosed in Patent Literature 1 is known as a rotary valve with an actuator in which an actuator is mounted on a valve. In the literature 1, two leg portions are extended at the lower part of the electric actuator, a bolt hole drilled in the leg portion, and a set screw on a screw formed at a projecting portion on the bonnet of the ball valve. Describes a ball valve in which a ball valve and an electric actuator are fixed by screwing.
In Patent Document 2, a valve and an actuator are connected via a yoke, and a bolt is screwed into a valve bonnet in a state where a cylindrical portion on the lower side of the yoke is fitted. A connection structure in which a valve and an actuator are fixed by bolting a flange on the side is disclosed.
When mounting an actuator on a valve in this way, mounting flanges and tap seats are provided on the bottom side of the actuator and the top surface of the valve, or a frame-shaped yoke for mounting is separately provided, and these are fastened with bolts. It is common to integrate by doing.

  By the way, for example, in a piping line inside various devices, a rotary valve with this kind of actuator is often provided for centralized control of fluid and systematization of the device, and this rotary valve is downsized. Therefore, it is required to be compact in order to be installed in a limited installation space in the equipment. In this case, it is important to lower the installation height of the rotary valve with actuator, and in addition to this, it is a structure that can be easily installed in a narrow installation space in equipment, and installation workability in a narrow work space is also possible. It is necessary to ensure.

Japanese Patent No. 3134223 No. 6-27905

However, in Patent Document 1, the actuator is provided with a projecting portion having a leg portion and a screw on the bonnet, and these are screwed with a set screw to fix the actuator and the ball valve. The whole part is extended in the height direction by the part.
In Patent Document 2, since the yoke for connecting the valve and the actuator is provided, the height is increased in the height direction by this yoke. In this way, in the structure where the mounting flange and tap seat are provided on the bottom side of the actuator and the top surface side of the valve, or the mounting yoke is separately provided and the valve and the actuator are mounted, the installation height becomes high and the whole At the same time, the working space for fastening the bolts becomes large, so that it becomes difficult to make the whole compact. For this reason, these valves with actuators cannot be provided in an installation space in a device that requires downsizing, and as a result, the size of the entire device is increased.

The shape of the connecting flange is generally not proportional to the size of the valve, but has a common dimensional configuration.When the size of the valve increases, the bolt through hole of the connecting flange is hidden in the valve body when viewed from below. Tightening bolts at the time of connection becomes difficult.
When these things are considered, it is difficult to use bolts that are tightened from the vertical direction, such as cross holes, minus holes, and hexagon socket head bolts. On the other hand, it is possible to use a bolt such as a hexagonal bolt that is tightened from the side, but it is difficult to tighten using a power tool or the like, and workability at the time of connection is poor.

  The present invention has been developed in view of the conventional problems, and the object of the present invention is to make it as compact as possible, for example, to be able to be compactly incorporated into equipment, and to save space while being small. An object of the present invention is to provide a rotary valve with an actuator that can be disposed even in a narrow installation place.

In order to achieve the above object, an invention according to claim 1 is a rotary valve with an actuator in which a valve body built in a body is rotated through a stem, and the stem is rotated by an actuator provided in the body. there are, the said flange portion and the body of the stem JikuSo side of the outer peripheral top and equal to or equal to or less than the the rewritable staggered projecting a pair of flange portions on either side position of the body, across the outer peripheral top actuator is positioned, and an actuator with a rotary valve mounted to the actuator to the flange portion in a state in which a fixing portion provided on the bottom side screwed the bolts in the flange portion of the actuator.

The invention according to claim 2 is a rotary valve with an actuator in which a ball having a through hole is rotatably provided in a body via a stem, and an upper end of the stem is connected to an output shaft of the actuator.

According to the first aspect of the present invention, the installation height can be minimized and the device can be made as compact as possible. For example, the device can be incorporated into the device while keeping the device compact, and is small in size and space-saving. It can be installed even in narrow installation locations, and the valve and actuator can be attached and detached with high precision and ease in a predetermined positional relationship without the need for machining accuracy or flow path adjustment work. Become. As a result, it is installed in a narrow installation space in various equipment such as general water treatment equipment, chemical equipment such as water supply equipment for food disinfection, agricultural fertilizer mixing equipment, etc. It is also possible to construct an apparatus system such as a mixing apparatus. Further, they can be compacted by positioning and fixing them while avoiding unnecessary interference between the valve and the actuator, and the projected area of the flange portion can be minimized to reduce the arrangement space. The bolt tightening interval can be ensured to increase the strength after tightening, and even when the rotary valve is repeatedly operated or vibrated, the bolt is less likely to loosen and the connection between the valve and the actuator can be strengthened. The flange portion and the fixing portion of the actuator can be easily fixed from the lower side of the valve with bolts, and the space for maintenance can be reduced.

According to the second aspect of the present invention, the upper end of the stem and the actuator output shaft can be connected while the overall height after assembly is kept low, and the stem and the output shaft can be connected in a positioned state. The rotation can be controlled.

It is the isolation | separation perspective view which showed 1st Embodiment of the rotary valve with an actuator of this invention. It is the front view which showed the connection state of the valve | bulb of FIG. 1, and an actuator. FIG. 3 is a side view of FIG. 2. FIG. 4 is a schematic central longitudinal sectional view of FIG. 3. It is a schematic longitudinal cross-sectional view which shows 2nd Embodiment of the rotary valve with an actuator of this invention. It is the top view which showed 3rd Embodiment of the rotary valve with an actuator of this invention. (A) is the isolation | separation perspective view which showed 4th Embodiment of the rotary valve with an actuator of this invention. (B) is the partially cutaway longitudinal cross-sectional view which showed 4th Embodiment of the rotary valve with an actuator of this invention.

  Hereinafter, embodiments of a rotary valve with an actuator according to the present invention will be described in detail with reference to the drawings. 1 is an exploded perspective view showing a first embodiment of a rotary valve with an actuator of the present invention, FIG. 2 is a front view showing a connection state between the valve and the actuator of FIG. 1, and FIG. 3 is a side view of FIG. The figure is shown.

  1 to 3, the rotary valve with an actuator according to the present invention has a detachable valve 1 and an actuator 2, for example, disposed as an automatic operation valve inside various devices (not shown) or a part of a plant. Is done.

  As shown in FIG. 4, the valve 1 has, for example, a rotary valve structure made of a ball valve, and a valve body 5 made of a ball having a through hole 5 a is built in the body 4 of the valve 1. A stem 7 is connected to the valve body 5 via a short cylinder portion 6 formed on the mounting side. The upper end 7 a of the stem 7 is connected to the output shaft 20 of the actuator 2, and the valve body 5 is rotated via the stem 7 by the rotation operation of the actuator 2 connected to the body 4. A flow path 4 a is provided in the body 4, and the flow path 4 a is opened and closed by the rotation of the valve body 5.

An outer peripheral surface 6 a and an inner peripheral surface 6 b are provided on the short cylinder portion 6 on the stem 7 shaft mounting side, and an upper surface 6 c is formed on the actuator 2 mounting side of the short cylinder portion 6. As will be described later, when the valve 1 and the actuator 2 are integrated, the valve 1 and the actuator 2 can be positioned via the outer peripheral surface 6a, the inner peripheral surface 6b, and the upper surface 6c.
In FIG. 1, an outer peripheral top portion 8 is formed around the stem 7 shaft mounting side of the body 4, and a pair of flange portions 9, 9 are laterally arranged on both side surface positions of the body 4 equal to or less than the outer peripheral top portion 8. Projected in the direction. The flange portion 9 is provided at a line-symmetrical position about the axis P of the flow path 4a. The flange portion 9 is formed with a communication hole 11 into which a bolt 10 as a fixing means can be inserted. A parallel two-surface portion 12 is formed on the upper end 7 a of the stem 7, and the parallel two-surface portion 12 is formed so as to protrude slightly from the upper surface 6 c of the short cylinder portion 6.

  Here, the outer peripheral top portion 8 refers to the top portion position of the body 4 on the short tube portion 6 side. If the body 4 is a hexagonal cross section as in this example, the top portion on the short tube portion 6 side of the body 4 is referred to. If the flat surface as shown in FIG. 1 is formed on the top, the top surface of the flat surface is referred to. If the body 4 is circular in cross section, the circular top on the short tube portion 6 side of the body 4 is referred to.

  As shown in FIGS. 1 and 2, the flange portion 9 is equal to or less than or equal to the outer peripheral top portion 8 of the body 4 and is disposed above the flow axis of the body 4. The reason why the flange portion 9 is arranged to be equal to or more than the outer peripheral top portion of the body 4 is to set the bolt 10 that connects the flange portion 9 and the fixing portion of the actuator to be short. Further, the flange portion 9 is disposed above the flow path axis P of the body 4 even if the valve is incorporated in the device and the bottom surface of the valve body is fixed to the wall surface of the device. This is because a fastening tool such as a bolt with a hole is easily tightened from below the flange portion. The bolt 10 is screwed into the communication hole 11 of the flange portion 9 only from the lower side, and the flange portion 9 and the fixing portion 21 provided on the actuator 2 are fixed by the bolt 10. Thereby, these can be integrated, shortening the connection distance of the actuator 2 and the valve | bulb 1 and restraining the whole height low.

  The actuator 2 is of an electric type. Inside the actuator 2, an electric motor (not shown), a reduction gear group for transmitting the rotation from the motor at a reduced speed, a limit switch, an indicator unit, a control unit such as a capacitor, Internal components such as the output shaft 20 shown in FIG. Each internal component is housed in a predetermined position in the actuator 2. In the figure, only the output shaft 20 of the internal components is shown, and other internal components are omitted.

  The output shaft 20 is press-fitted into a final gear (not shown) of the reduction gear group on the upper side and can be connected to the stem 7 while being kept coaxial with the final gear. A bearing and an O-ring (not shown) are attached near the intermediate position of the output shaft 20, and the output shaft 20 is rotatably provided through this. At the tip of the output shaft 20, a concave groove 22 that can be fitted to the parallel two-surface portion 12 of the stem 7 is formed.

  In the actuator 2, when the motor rotates, this rotation is decelerated via the internal components and output to the output shaft 20. The rotation of the output shaft 20 is transmitted to the stem 7 through the concave groove 22 and the parallel two-surface portion 12, and the valve body 5 is rotationally controlled to a predetermined opening degree. The actuator 2 is for rotating operation of a so-called quarter-turn rotary valve. Although not shown, a cam portion meshed with the reduction gear train and an indicator may be provided on this cam portion.In this case, the rotation state of the output shaft is displayed outside via the cam portion and the indicator, The operating state can be confirmed from the outside.

  An insertion recess 26 is formed in the bottom surface portion 25 of the actuator 2, and the insertion recess 26 is provided in a shape that can be fitted to the short tube portion 6. When the actuator 2 is connected to the body 4, when the outer peripheral surface 6 a of the short cylindrical portion 6 is fitted into the fitting recess 26, the actuator 2 is positioned in the radial direction on the stem shaft mounting side of the body 4. The insertion recessed part 26 should just be a shape which can fit the short cylinder part 6 and can position it to radial direction, for example, a cylindrical shape. Further, as other positioning of the actuator 2 in the radial direction toward the body 4 shaft mounting side, as shown in FIG. 5, the output shaft 20 is provided so as to be fitted to the inner peripheral surface 6 b of the short cylindrical portion 6, Alternatively, the outer peripheral surface 6a of the short tube portion 6 can be provided in the fitting recess 26 so as to be fitted, or the output shaft 20 can be provided so as to be fitted in the inner peripheral surface 6b of the short tube portion 6.

Further, when the actuator 2 is connected to the body 4, the fitting recess 26 provided on the bottom surface side of the actuator 2 can be brought into contact with the upper surface 6 c of the short cylindrical portion 6, or the bottom surface portion 25 of the actuator 2 is brought into contact with the outer peripheral top portion 8. The protrusion-like fixing portions 21 provided on both sides of the actuator bottom surface portion 25 can be brought into contact with the flange portion 9. By bringing these portions into contact with each other, the actuator 2 can be positioned in the height direction with respect to the body 4.
In the present embodiment, as shown in FIG. 4, the short cylindrical portion upper surface 6 c is brought into contact with the bottom surface side of the insertion concave portion 26 of the actuator bottom surface portion 25. In addition to the above, it can also be provided in the shape of a flat surface or a boss not shown.

  With the above configuration, the actuator 2 is positioned on the flange portion 9 across the outer peripheral top portion 8 of the body 4, and the fixing portions 21 and 21 on both sides of the actuator 2 and the flange portions 9 and 9 of the body 4 are attached by bolts 10. Thus, the actuator 2 is attached to the valve 1. At this time, the fixing portion 21 is provided with a female screw 27, and the male screw 28 of the bolt 10 is screwed to the female screw 27.

  At this time, the body 4 and the actuator 2 are positioned in the radial direction with respect to the direction in which the body 4 and the actuator 2 are connected by fitting the short tube portion 6 and the fitting recess 26 or fitting the short tube portion 6 and the output shaft 20. It was made to stick while doing.

  Further, the body 4 and the actuator 2 are connected to the upper surface 6c of the short tube portion 6 and the fitting recess 26 or between the outer peripheral top portion 8 and the bottom surface portion 25, or between the flange portion 9 and the fixing portion 21. By abutment, it is fixed while positioning in the height direction with respect to the connection direction.

  In the above embodiment, the valve 1 is a ball valve. However, as long as the valve can be driven by the actuator 2, a valve other than the ball valve may be used. For example, a butterfly valve is used as the valve 1. Also good. Also in this case, the actuator 2 can be detachably provided as in the case of the ball valve. Moreover, although the actuator 2 is an electric type, it may be a pneumatically driven actuator. Although the parallel two-surface portion 12 is provided on the upper end 7a of the stem 7 of the valve 1 and the concave groove 22 is provided on the distal end side of the output shaft 20 of the actuator 2, a combination of these may be reversed.

  In the case where the valve 1 and the actuator 2 are assembled integrally, in FIG. 1, the through hole 5a of the valve body 5 is fully opened in a direction parallel to the flow path 4a, while the actuator 2 is also fully opened. The short cylindrical portion 6 is fitted into the fitting recess 26 while the parallel two-surface portion 12 is fitted into the concave groove 22. Thereby, the positioning of the body 4 and the actuator 2 in the radial direction is completed. Further, the contact between the upper surface 6c of the short cylindrical portion 6 and the fitting concave portion 26 completes the positioning of the body 4 and the actuator 2 in the height direction, and the valve 1 is placed in a state where the fixing portion 21 faces the flange portion 9. The actuator 2 is temporarily attached.

  Subsequently, the male screw 28 of the bolt 10 is screwed into the female screw 27 of the fixing portion 21 from the lower side of the communication hole 11 of the flange portion 9, and the flange portion 9 and the fixing portion 21 are fixed by this bolt 10. When the bolt 10 is fastened, the flange portion 9 is formed so as to protrude to both side positions of the body 4, so that the bolt 10 and a fastening tool (not shown) do not interfere with the valve 1 and the lower side of the flange portion 9. The bolt 10 can be easily tightened and integrated from the lower side when the large-sized valve 1 is connected. In this case, the actuator 2 and the through hole 5a can be connected while ensuring the positional relationship when fully opened.

  As described above, the flange portions 9 are provided at both side positions of the body 4 that are equal to or less than the outer peripheral top portion 8 on the stem 7 shaft mounting side of the body 4, and the actuator 2 is positioned on the flange portion 9 across the outer peripheral top portion 8. In addition, since the fixing portion 21 and the flange portion 9 are attached via the bolt 10, the height required for connecting the valve 1 and the actuator 2 is minimized, and the overall height of the product is suppressed to be compact. Can be achieved. This compact design enables installation in a narrow installation space.

  In addition, since the body 4 and the actuator 2 are positioned in the radial direction by fitting the short tube portion 6 and the fitting recess 26 or fitting the short tube portion 6 and the output shaft 20, the stem 7 The output shaft 20 and the stem 7 can be connected in a coaxial state by simply fitting the body 4 and the actuator 2 without adjusting the output shaft 29 in the axial direction. After the connection, the rotation from the output shaft 20 is efficient. Can be transmitted to the stem 7.

Further, the body 4 and the actuator 2 are connected to the upper surface 6c of the short tube portion 6 and the insertion recess 26, or to the contact between the outer peripheral top portion 8 and the actuator bottom surface portion 25, or the flange portion 9 and the fixing portion 21. Since the positioning in the height direction is performed by the contact, the heights of the valve 1 and the actuator 2 can be matched when the short cylinder portion 6 and the fitting recess 26 are fitted, and these are made high. It is possible to connect to a predetermined positioning state without adjusting in the vertical direction. At this time, since the short cylinder portion upper surface 6c and the fitting recess 26, the outer peripheral top portion 8 and the bottom surface portion 25, the flange portion 9 and the fixing portion 21 are all in contact with each other by the flat surfaces, the valve 1 and the actuator 2 are stabilized. Can be fixed in the state.
When removing the actuator 2 from the valve 1, it can be easily removed by loosening the bolt 10.

  In FIG. 5, 2nd Embodiment of the rotary valve with an actuator of this invention is shown. In the following embodiments, the same parts as those in the above embodiments are denoted by the same reference numerals, and the description thereof is omitted. In this rotary valve with an actuator, the valve 1 and the actuator 2 are connected while the short cylinder portion 30 and the output shaft 20 are fitted. In this case, by inserting the outer peripheral surface 20a of the output shaft 20 into the inner peripheral surface 30a of the short cylindrical portion 30, the output shaft 20 can be fitted into the short cylindrical portion 30 and the valve 1 and the actuator 2 can be positioned in the radial direction. . Furthermore, in this embodiment, if the insertion recess 26 and the short tube portion 6 are provided so as to be fitted in the same manner as in the above-described embodiment, positioning in two radial directions is performed.

  In FIG. 6, 3rd Embodiment of the rotary valve with an actuator of this invention is shown. In this rotary valve with an actuator, a pair of flange portions 31, 31 that are equal to or less than or equal to the outer peripheral top portion 8 are alternately formed on both side positions of the body 4 of the valve 1, and this flange portion 31 and the one-dot chain line are shown. The fixing portion 21 of the actuator 2 is provided so as to be fixed by the bolt 10 of FIG. In this case, it is possible to ensure a long fastening interval between the bolts 10 while minimizing the projected area of the flange portion 31. As a result, the strength after tightening is improved, and the bolt 10 is less likely to loosen even when repetitive rotating operations or vibrations occur, and the connection between the valve 1 and the actuator 2 can be maintained firmly.

In FIG. 6, for comparison, the flange portion of the first embodiment (a line symmetrical position with the axis P of the flow path as the center) is indicated by a dotted line. The above-described alternate means that the two flange portions are separated from each other at positions opposite to each other about the stem axis. Specifically, in this embodiment, a point-symmetrical position about the axis Q of the stem 7 is used. Is arranged. At this time, the width W of the flange portion is the same for the flange portions 9 and 9 of the first embodiment and the flange portions 31 and 31 of the present embodiment having the outer peripheral top portion 8 of the same length T. However, in this embodiment, by arranging the flange portions 31 and 31 alternately, the bolt fastening interval L2 in this embodiment can be set longer than the bolt fastening interval L1 of the first embodiment. Specifically, L2 = L1 cos θ (in this embodiment, θ≈30 °), and the relationship is L2> L1.
Accordingly, it is possible to ensure a long bolt fastening interval while minimizing the width W of the flange portion, that is, the projected area, and to obtain a moment force necessary for fixing the actuator.

7A and 7B show a fourth embodiment of the rotary valve with an actuator of the present invention. In this rotary valve with an actuator, an actuator 50 having a structure different from the above is attached to the valve 1 described above. The actuator 50 includes a case main body 51 and a covering cover body 52 that can be attached to and detached from the case main body 51. Internal parts (not shown) are housed in the case main body 51 and the cover body 52, and the entire structure is small. The height is kept low. As shown in FIG. 7B, cylindrical fixing portions 54, 54 are suspended from both sides of the bottom surface portion 53 of the actuator 50, and the valve 1, the actuator 50, Is fixed.
In this manner, by forming the fixing portion 54 for fixing the bolt 10 from the bottom surface portion 53 of the case main body 51, the valve 1 and the actuator 2 can be integrated while maintaining the compactness of the actuator 50.
In each of the above-described embodiments, the fixing portion of the actuator is suspended from both sides of the actuator. However, this suspension is formed, but the actuator is directly adhered to the bottom surface of the actuator body without providing the suspension formation portion. A portion may be provided.

1 Valve 2 Actuator 4 Body 5 Ball (Valve)
5a Through-hole 6 Short cylinder portion 6a Outer peripheral surface 6b Inner peripheral surface 6c Upper surface 7 Stem 7a Upper end 8 Outer peripheral top portion 9 Flange portion 10 Bolt (fixing means)
20 Output shaft 21 Securing part 25 Bottom face part 26 Insertion recess

Claims (2)

A rotary valve with an actuator in which a valve body built in a body is rotated through a stem and the stem is rotated by an actuator provided in the body, and is equivalent to an outer peripheral top portion on the stem shaft mounting side of the body or equal to or less than the body of the rewritable staggered projecting a pair of flange portions on either side position, the across the outer peripheral top is positioned the actuator to the flange portion, and is provided on the bottom side of the actuator secured A rotary valve with an actuator , wherein the actuator is attached to the flange portion with a bolt screwed to the flange portion and the flange portion . The rotary valve with an actuator according to claim 1, wherein a ball having a through hole in the body is rotatably provided through the stem, and an upper end of the stem is connected to an output shaft of the actuator.

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