JP6014314B2 - Rotary valve with actuator - Google Patents

Description

  The present invention relates to a rotary valve with an actuator, and more particularly, to a structure for attaching and detaching a small electric valve that can be incorporated in equipment 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 attached / detached even in a narrow installation space in the equipment. 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 the document 2, since a yoke for connecting the valve and the actuator is provided, the height is increased in the height direction by this yoke. In this way, when the mounting flange and tap seat are provided on the bottom side of the actuator or the top surface of the valve, or the mounting yoke is separately provided to attach and detach the valve and the actuator, the installation height increases and the overall size increases. At the same time, the work space for fastening the bolts increases, making it 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.

  Furthermore, if the valve and actuator are connected in the device with low mounting accuracy, such as when the port of the ball valve body and the flow path are not parallel (so-called ball peeping state), impurities will adhere to the top surface of the ball. As a result, the sheet is easily worn. In order to avoid this, it is necessary to adjust the flow path when the valve and the actuator are connected. This adjustment of the flow path is required every time the actuator or the valve is replaced for maintenance or the like. In addition, since the valves and actuators form part of the piping line in the device, it is difficult to confirm the state of the ball valve body, so this flow path adjustment operation is difficult. In order to omit the adjustment of this flow path, it is possible to improve the dimensional accuracy of the fitting part of the valve stem, which is the power transmission part between the valve and the actuator, and the output shaft of the actuator, and to suppress the backlash between the two. Although possible, it is difficult to manufacture because high-precision dimensional processing is required. On the other hand, it is possible to omit the adjustment operation by increasing the rounded shape of the opening of the port of the ball valve body, but in this case, it is difficult to ensure the fully closed position of the ball valve body, so that practical use is difficult.

  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. Provided is a rotary valve with an actuator that can be installed even in a narrow installation place, and can attach and detach a valve and an actuator with high accuracy and easily in a predetermined positional relationship without requiring processing accuracy and flow path adjustment work. There is.

In order to achieve the above object, the 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. A plate-like connecting plate body for connecting an actuator disposed on the outer peripheral top surface portion of the outer peripheral surface of the body on the stem shaft mounting side of the body and formed to project to the same or less than the outer peripheral top surface portion of the body The actuator is mounted on the connection plate body with the mounting portion fixed with bolts, and the valve and the actuator are attached / detached by a connection mechanism comprising a fixing means for inserting / removing from the lateral direction crossing the axial direction of the stem. It is a rotary valve with an actuator characterized by being provided.

In the invention according to claim 2 , a pair of attachment portions are formed to protrude in a laterally staggered manner at both side surface positions of the body, and the connection plate body is in a state of being alternately formed. It is a rotary valve with an actuator in which a pair of flange portions are formed, and the attachment portion and the flange portion are fixed with bolts .

  According to a third aspect of the present invention, a pair of fitting tube portions are formed between the pair of flange portions of the connection plate body, and a fitting recess is formed on the bottom surface surrounding the output shaft of the actuator, and the fitting recess is fitted. It is a rotary valve with an actuator that is fitted to a cylinder part and positions the actuator on a connection plate body.

  The invention according to claim 4 is the rotary valve with an actuator in which at least two mounting holes for mounting the tip of the fixing pin are formed in the radial direction on the outer periphery in the lateral direction of the fitting tube portion.

  The invention according to claim 5 is the rotary valve with an actuator in which the insertion hole formed in the connection plate body is inserted and positioned in the stem shaft mounting portion of the body.

  According to a sixth aspect of the invention, the connecting mechanism is a rotation with an actuator having a structure in which an attaching / detaching portion having a pair of female screw portions on the bottom surface of the actuator and a tip of a fixing pin screwed into the attaching / detaching portion are positioned and fixed in the attachment hole. It is a valve.

  The invention according to claim 7 is the rotary valve with an actuator formed in a head shape in which the fixing pin can be tightened by an arbitrary method at the time of tightening and loosened with a tool when loosened.

According to the first aspect of the present invention, the plate-like connection plate body is fixed to the outer peripheral top surface portion of the body on the stem shaft mounting side, and the valve and the actuator are detachably provided by the connection mechanism. It is possible to reduce the height as much as possible and to make it as compact as possible.For example , when installing inside a device that does not have space, it can be incorporated while maintaining compactness, and it is compact but saves space. also enables disposed in a narrow location Te, have been, it is possible to detachably accurately and easily a valve and actuator in a predetermined positional relationship without requiring adjustment of the machining accuracy and the flow path .

  According to the second aspect of the present invention, by attaching the ends of the flanges to the mounting portions of the body that are alternately provided on the both side surface positions equal to or less than or equal to or equal to or equal to the outer peripheral top surface portion, it is unnecessary to add extra to the valve or the actuator. The connection plate body can be fixed while being laterally positioned in a space-saving space while avoiding interference, and the valve and the actuator can be attached and detached with this connection plate body while minimizing the height dimension. In addition, by inserting bolts from below the attachment portion and fixing the flange end and the attachment portion, the actuator can be easily attached and detached from the valve side even when it is installed in a narrow installation space.

  According to the third aspect of the present invention, the fitting recess formed on the bottom surface side of the actuator is fitted to the pair of fitting cylinders provided on the connection plate body, so that the valve and the actuator can be made highly accurate in the axial direction of the stem. It can be temporarily attached while positioning, and can always be fixed in a fixed state without adjusting the positional relationship between the valve and the actuator. As a result, the actuator is fully opened and the port formed in the valve element is opened in parallel with the flow path, so that these actuators and valves can be assembled easily and accurately without adjusting the flow path. Can be integrated. In addition, if it is possible to position the fitting recess by fitting the fitting cylinder, the height of these parts can be kept low to limit the height of the attachment / detachment part between the valve and the actuator. It becomes possible to make it compact.

  According to the fourth aspect of the present invention, the connecting plate body can be attached to and detached from the actuator from the lateral direction with the fixing pin, so that the actuator and the valve can be easily connected even in a narrow work space while minimizing the fixing portion between the actuator and the connecting plate body. It becomes detachable. By mounting two fixing pins in two mounting holes formed in the radial direction, it can be firmly fixed while saving space, the actuator tilts with respect to the valve, and the fixing pin loosens when the stem rotates It also prevents dripping. In addition, by installing mounting holes on the left and right lateral peripheries of the fitting cylinder part, the mounting position of the fixed pin can be changed according to the installation status of the valve and actuator, and maintenance space can be reduced. become.

  According to the invention according to claim 5, the connection plate body can be fixed while being coaxially positioned with respect to the stem shaft mounting portion, and when the flange portion end portion of the connection plate body is fixed to the mounting portion of the body with a bolt, The fitting tube portion of the connection plate body can be accurately arranged at a predetermined position of the valve. For this reason, it becomes possible to attach and detach the valve and the actuator with high accuracy via the fitting tube portion and the fitting recess formed in the actuator.

  According to the sixth aspect of the present invention, the fixing pin is screwed into the attaching / detaching portion having a pair of female threaded portions so that the valve and the actuator can be positioned while preventing rattling, and on the other hand, by simply loosening the fixing pin. The valve and the actuator can be easily removed, and this attachment / detachment can be performed while tightening or loosening the fixing pin from the lateral direction on one side. For this reason, even when arranged in a narrow installation space, if there is a space in which the two fixing pins can be rotated, the attaching / detaching operation can be performed.

  According to the invention of claim 7, when the fixing pin is tightened, excessive torque is prevented to prevent the valve and the actuator from becoming detachable and parts such as the fixing pin are damaged, and the fixing pin is loosened. Sometimes the tool can easily remove the valve and actuator.

It is an isolation | separation perspective view of the rotary valve with an actuator of this invention. It is the isolation | separation perspective view which showed the connection state of a valve | bulb and an actuator. It is a perspective view which shows the rotary valve with an actuator of this invention. It is a bottom view of a case. It is a top view of a case. It is a front view which shows the connection state of an actuator and a valve | bulb. It is the perspective view which showed the temporary attachment state to the valve | bulb of the connection plate body. (A) is a partially cutaway sectional view showing a state in which the valve and the actuator are connected. (B) is a partially cutaway sectional view showing a state in which the actuator is removed from the valve. It is AA sectional drawing of Fig.8 (a). FIG. It is a partially cutaway perspective view of an actuator. It is a top view which shows the actuator of the state which removed the cover. It is a side view which shows the attachment state of the last stage gear. It is the model top view which showed the reduction gear group. It is a perspective view which shows the attachment state of the last stage gear. (A) is a top view which shows the state of the protrusion cam part at the time of opening and closing of a valve. (B) is a top view which shows the state of the protrusion cam part at the time of valve opening. (C) is a top view which shows the state of the protrusion cam part at the time of valve closing.

  Hereinafter, embodiments of a rotary valve with an actuator according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows an exploded perspective view of a rotary valve with an actuator of the present invention, FIGS. 3 and 6 show a connection state between the valve and the actuator, and FIG. 10 shows an exploded perspective view of the actuator.

  In the figure, the rotary valve with actuator in the present invention has a valve 1, an actuator 2, and a connection plate body 3, and the valve 1 and the actuator 2 can be attached and detached via the connection plate body 3. The rotary valve with an actuator of the present invention is disposed as an automatic operation valve, for example, inside various devices (not shown) or a part of a plant.

  As shown in FIG. 2, the valve 1 has a rotary valve structure including, for example, a ball valve shown in the figure, and a valve body 5 having a port 5 a is built in the body 4 of the valve 1. A stem 7 is connected to the body 4 via a stem shaft mounting portion 6 formed on the body 4. The valve 1 can rotate the valve body 5 through the stem 7, and the stem 7 can be rotated by 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 top surface portion 8 is formed around the stem shaft mounting portion 6 of the body 4, and a pair for fixing the connection plate body 3 to both side surface positions of the body 4 that is equal to or less than the outer peripheral top surface portion 8. The mounting portions 9 and 9 are formed so as to protrude alternately in the lateral direction, and through holes 11 into which the bolts 10 can be inserted are formed in the mounting portions 9. A parallel two-surface portion 12 is formed at the upper end of the stem 7, and the parallel two-surface portion 12 is formed so as to protrude slightly from the upper surface of the stem shaft mounting portion 6.

The outer peripheral top surface portion 8 here refers to the top position of the body 4 on the stem shaft mounting portion 6 side. If the body 4 has a hexagonal cross section as in this example, the top portion of the body 4 and the stem shaft mounting portion 6 side. If the flat surface as shown in FIG. 2 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 stem shaft mounting portion 6 side of the body 4 is defined. Say.
In addition, in FIG. 6, if the body is in the area of the gap S provided between the outer peripheral top surface 8 and the tapered surface of the body 4 or a body having a circular cross section (not shown), it is between the top and the rounded surface. A connecting mechanism 90 and a reinforcing rib 80c, which will be described later, are accommodated in the space S. Therefore, since a rotary valve with an actuator can be configured by placing the bottom surface portion 20a of the case body 20 of the actuator 2 shown in FIG. 4 on the flange portion 80 of the connection plate body 3, the integrated actuator and rotary valve It becomes possible to make the height as small as possible, which can significantly contribute to the downsizing of the product.

  In the present embodiment, the attachment portion 9 is equal to or less than or equal to or less than the outer peripheral top surface portion 8 of the body and is disposed above the flow axis of the body 4. The bolt 10 is inserted into the through hole 11 of the attachment portion 9 only from the lower side, and is screwed into a male screw 80b of the connection plate body 3 described later. Thereby, the distance between the actuator 2 and the valve 1 is reduced, and the connection between the actuator 2 and the valve 1 is made possible while keeping the overall height low. A parallel two-surface portion 12 is formed at the upper end of the stem 7, and the parallel two-surface portion 12 is formed so as to protrude slightly from the upper surface of the stem shaft mounting portion 6.

  1 and 10, the actuator 2 is an electric type. An electric motor 21, a reduction gear group 22 for reducing and transmitting rotation from the motor 21 to the case body 20 of the actuator 2, and an output shaft are shown. 23, a limit switch 24, a protruding cam portion 25, an indicator portion 26, and a control portion 27 such as a capacitor. Each of these components is housed in a predetermined position in the case main body 20 via the base plate 30 and the wiring retainer 31, and a covering cover body 32 is fixed to the case main body 20.

  As shown in FIG. 5, the case main body 20 has a semicircular arc-shaped portion 20a and a rectangular portion 20b, which are connected to each other. A bearing portion 33, an internal thread 34, and a placement surface 35 are formed in the case body 20. The bearing portion 33 is provided on the bottom surface 36 of the case main body 20, and each of the first gear 41, the second gear 42, the third gear 43, the fourth gear 44, and the final gear 45 of the reduction gear group 22 is provided by the bearing portion 33. The lower end 47 of the rotation shaft 46 of the gear can be bearing. The female screw 34 is provided on the inner peripheral side of the case main body 20, and the placement surface 35 is provided at a position higher than the bottom surface 36 of the case main body 20, and the wiring presser can be placed on the placement surface 35. ing. A communication hole 48 is provided on the bottom side surface of the case body 20, and a bush 49 is attached to the communication hole 48.

A flange 50 is provided on the outer periphery of the bottom of the motor 21, and the motor 21 is attached to the upper surface 30 a of the main plate 30 through a notch 51 provided in the flange 50. The motor 21 is screwed and fixed to the female screw 34 of the case body 20 with the male screw 52 through the fixing base plate 30.
The base plate 30 is provided with a through hole 54 through which the male screw 52 can be inserted, and the motor 21 is positioned and fixed to the case body 20 together with the base plate 30 through the notch 51 and the through hole 54. A bearing portion 55 is provided on the lower surface 30 b of the main plate 30, and the rotation shaft 46 of each gear 40, 41, 42, 43, 44, 45 of the reduction gear group 22 provided in the lower surface region R of the motor 21 by this bearing portion 55. The upper end 56 of this is bearing. Furthermore, a stopper portion 58 for engaging with a stopper pin 57 described later is also provided on the lower surface 30b of the base plate 30. An arc portion 59 having substantially the same shape as a part of the arc formed by the final gear 45 of the reduction gear group 22 is formed along the final gear 45 on the indicator portion 26 side of the main plate 30. The arc portion 59 can guide the indicator portion 26 fixed to the final gear 45.

  A pinion 40 is attached to the rotary shaft 60 on the output side of the motor 21. The reduction gear group 22 includes the pinion 40, the first gear 41, the second gear 42, the third gear 43, the fourth gear 44, and the final stage. A pin 45 is inserted as a rotation shaft 46 at the center of each gear 41, 42, 43, 44, 45. As shown in FIG. 12, the reduction gear group 22 is provided in the lower surface region R of the motor 21 of the case body 20 or inside the motor 21, and is housed in the case body 20 in a state of being parallel to the motor 21 in the vertical direction.

  In the reduction gear group 22, the pinion 40 is the first gear 41, the first gear 41 is the second gear 42, the second gear 42 is the third gear 43, the third gear 43 is the fourth gear 44, and the fourth gear 44 is the final It meshes with the step gear 45. The rotation of the rotating shaft portion 60 of the motor 21 is decelerated by the reduction gear group 22 and transmitted to the stem 7 of the valve 1 from the output shaft 23 that is coaxially attached to the final gear 45.

  The protruding cam portion 25 is attached in a state where the rear end portion 25 a is fixed to the shaft portion 45 a of the final stage gear 45, and rotates as the final stage gear 45 rotates. The protruding cam portion 25 is provided so as to extend from the bottom surface 36 of the motor 21 and slightly protrude from the outer periphery of the final step tooth 45 wheel. It is possible to make it.

  Fixing stopper pins 57 are fixed to both sides of the protruding cam portion 25 of the final gear 45, and the stopper pins 57 engage with the stopper portions 58 provided on the base plate 30 to thereby protrude the protruding cam. The part 25 can be rotated by approximately 90 °.

  In this case, as shown in FIG. 16A, with reference to the position of the intermediate opening of the final gear 45, the final gear 45 rotates at an angle α of 45 ° in the fully closed direction and 45 ° in the fully opened direction. A stopper pin 57 is arranged at a position where it becomes possible. Further, as shown in FIGS. 16 (b) and 16 (c), a play angle β for rotating the final gear 45 more than 45 ° may be provided on the fully opened and fully closed positions side, respectively. . The play angle β at this time may be about 4 °. By providing this play angle β, the final stage gear 45 rotates to 45 ° or more in the fully open and fully closed directions, and is limited by the protruding cam portion 25. The switch 24 can be reliably turned on.

  As shown in FIGS. 11 and 13, an indicator portion 26 is formed at the distal end portion 25 b of the protruding cam portion 25 so as to protrude upward along the side surface 21 a of the motor 21. The indicator portion 26 rotates integrally with the protruding cam portion 25, and the indicator portion 26 is provided in a size that can be seen from the upper direction and the side surface direction of the actuator 2, so that the rotating state of the protruding cam portion 25 can be changed. It is easier to check from outside.

  As shown in FIG. 12, two limit switches 24 are provided in the case body 20, and are arranged in the space region T of the motor side surface 21a. The limit switch 24 is fixed to a mounting protrusion 62 provided on the case body 20 by a retaining ring 61 in the vicinity of the end side when the protruding cam portion 25 rotates, and is a corner portion of the rectangular portion 20b of the case body 20. Placed in. Between the limit switches 24, 24, a control unit 27 including a capacitor and a substrate for controlling the limit switch 24 is disposed. When the final gear 45 rotates, the projecting cam portion 25 comes into contact with any one of the limit switches 24 and is turned on, so that the rotation state of the final gear 45 can be transmitted to the limit switch 24. In this way, the fully open or fully closed position of the actuator 2 can be detected by the limit switch 24. At this time, the operating state of the actuator 2 can be confirmed by visually checking the protruding cam portion 25 from the outside.

  A wiring retainer 31 is provided between the reduction gear group 22 and the case body 20, and the wiring retainer 31 has a through hole 63, and an output stage shaft 64 provided in the through hole 63 below the final stage gear 45. And the rotation shaft 46 of each gear of the reduction gear group 22 pass therethrough so that the rotation operation of the output stage shaft 64 and the rotation shaft portion 60 is not hindered. The wiring retainer 31 is fixed in a state where it is placed on the placement surface 35 of the case body 20. As shown in FIG. 11, the wiring 37 of the motor 21, limit switch 24, and control unit 27 is arranged on the bottom surface 36 of the case body 20, and the wiring 37 is connected to the bottom surface 36 side of the case body 20 by the wiring retainer 31. Stored. The wiring 37 is drawn to the outside of the actuator 2 through the communication hole 48 and is connected to a device or the like (not shown).

  The output shaft 23 is press-fitted into the final stage gear 45 on the upper side, is provided coaxially with the final stage gear 45, and is provided so as to be connectable to the stem 7. Near the intermediate position of the output shaft 23 is rotatably attached to the case body 20 via a bearing 65 and an O-ring 66, and a concave groove that can be fitted to the parallel two-surface portion 12 of the stem 7 at the tip of the output shaft 23. 67 is formed.

  The actuator 2 decelerates the rotation of the motor 21 through the above components and outputs it to the output shaft 23, and transmits it to the stem 7 through the parallel two-surface portion 12 fitted in the concave groove 67 of the output shaft 23, The valve body 5 can be controlled to rotate to a predetermined opening. The actuator 2 is for rotating operation of a so-called quarter-turn rotary valve. As described above, when the output shaft 23 (final stage gear 45) is controlled to rotate at a rotation angle of about 90 °, this rotation state is set. Is displayed outside by the protruding cam portion 25.

The cover body 32 is formed of a transparent or translucent resin, and a bulging portion 68 for housing the motor 21, the protruding cam portion 25, and the indicator portion 26 is bulged. The cover body 32 is subjected to surface processing by, for example, texturing, and a transparent or translucent visual recognition portion 70 is provided by not providing the texturing processing in which the protruding cam portion 25 of the bulging portion 68 is located. The operating state of the indicator part 26 can be visually recognized from the outside of the cover body 32 through the visual recognition part 70.
The cover body 32 is joined to the case body 20 by, for example, ultrasonic welding.

On the other hand, as shown in the hatched area of the two-dot chain line in FIG. 4, a fitting recess 71 for attaching the connection plate body 3 is formed on the bottom surface 36 surrounding the output shaft 23 of the actuator 2. The fitting recess 71 is formed in a shape that can be fitted into a fitting cylinder 72 (described later) provided in the connection plate body 3.
An attachment / detachment portion 73 for attaching / detaching the connection plate body 3 protrudes from the outer peripheral side of the actuator bottom surface 36, and a pair of female screw portions to which a male screw portion 75 of a fixing pin 74 described later can be screwed is attached to the attachment / detachment portion 73. Two sets of 76 are formed. The female thread portion 76 is formed in the radial direction at a predetermined angle θ (for example, 30 °) in the lateral direction of the stem 7.

  As shown in FIG. 7, a flange 80, a fitting cylinder 72, and a fitting hole 81 are formed in the connection plate 3 for connecting the valve 1 and the actuator 2. The flange portions 80 are alternately formed in pairs with respect to the connection plate body 3 for mounting to the valve 1, and the end portions 80 a of the respective flange portions 80 are female screws 80 b that are screwed with the male screws 10 a of the bolts 10. Is formed. The end portion 80a of the flange portion 80 and the mounting portion 9 of the valve 1 described above can be secured by screwing a bolt 10 inserted through the through hole 11 from below the mounting portion 9. A reinforcing rib 80 c is formed on the bottom surface side of the flange portion 80.

  Between the pair of flange portions 80, 80, a pair of fitting tube portions 72, 72 are formed to project, and the fitting tube portion 72 is provided in a shape that can be fitted into the fitting recess 71. By fitting the fitting recess 71 into the portion 72, it is possible to temporarily attach the actuator 2 to the connection plate body 3 while positioning it. The flange portion 80 and the fitting cylinder portion 72 are provided in a point-symmetric shape with respect to the center (not shown) of the connection plate body 3.

  8 and 9, two sets of bottomed mounting holes 82 and 82 are formed on the outer periphery in the lateral direction of the fitting cylinder portion 72 in the radial direction. The mounting hole 82 corresponds to the position of the female screw portion 76 and is formed on the same plane in the height direction by the same predetermined angle (30 ° in the present embodiment) θ as the female screw portion 76. The mounting hole 82 includes a tapered hole portion having a reduced diameter at the tip, and the tip 74 a of the fixing pin 74 can be mounted in the mounting hole 82. The two sets of mounting holes 82 and the internal thread portion 76 are arranged symmetrically with respect to the fitting cylinder portion 72.

  The fitting hole 81 is formed at the center position of the fitting cylinder portion 72 of the connection plate body 3 and has a hole diameter that can be fitted into the stem shaft mounting portion 6. By fitting the fitting hole 81 into the stem shaft mounting portion 6, the connection plate body 3 can be temporarily attached to the valve 1 while positioning.

  In FIG. 8, the fixing pin 74 is provided to connect the actuator 2 and the connection plate body 3 while positioning them. A tapered portion 83 is provided at the distal end 74a of the fixing pin 74. Following this tapered portion 83, a male screw portion 75 screwed into the female screw portion 76 of the actuator 2 and a head portion 84 for rotation operation are provided. .

  The taper portion 83 is formed at a predetermined taper angle (not shown) that can be attached to the mounting hole 82, so that when the male screw portion 75 is screwed into the female screw portion 76, the taper portion 83 follows the mounting hole 82. Positioned. Thereby, the connection plate body 3 and the actuator 2 are fixed in a state where they are accurately positioned at predetermined positions. As shown in the drawing, it is sufficient that a threaded portion is formed only in a portion that is screwed to the female threaded portion 75 and the female threaded portion 76, and an intermediate portion thereof may be omitted. In this case, since the external thread part 75 screwed to the internal thread part 76 is reduced, the work of tightening or loosening the fixing pin 74 is simplified.

  A concave portion 85 that can be rotated in one direction by a tool such as a general tool (not shown) is formed in the head portion 84, and the fixing pin 74 can be loosened by rotating with the tool through the concave portion 85. ing. On the other hand, it is possible to tighten the fixing pin 74 by gripping the outer periphery of the head portion 84 by hand or rotating it by an arbitrary method such as a special tool. The concave portion 85 can be provided in an appropriate shape as long as it is a rotation operation with a general tool attached. The shape of the head 84 is loosened using a tool such as a general tool and is clamped by an arbitrary method such as gripping by hand or using a special tool. It is also possible to provide it.

With the above-described configuration, the rotary valve with actuator, as shown in FIG. 2, has the connection plate body 3 for connecting the actuator fixed to the outer peripheral top surface portion 8 on the stem shaft mounting side of the body 4. 2 and the valve 1 and the actuator 2 are detachably provided by a connection mechanism 90 including a fixing means that is inserted and removed from a lateral direction crossing the axial direction of the stem 7.
The connection mechanism 90 has a structure in which an attaching / detaching portion 73 of the actuator bottom surface 36 in which a pair of female screw portions 76, 76 is formed and a tip 74 a of a fixing pin 74 screwed into the attaching / detaching portion 73 are positioned and fixed in the mounting hole 82. Consists of.

  In the above embodiment, the valve 1 is a ball valve, but a butterfly valve may be used as long as the valve can be driven by the actuator 2. Also in this case, the actuator 2 can be provided in a detachable structure 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 side of the stem 7 of the valve 1 and the concave groove 67 is provided on the distal end side of the output shaft 23 of the actuator 2, these may be provided in reverse. Although the number of fixing pins 74 is two, three or more fixing pins 74 may be provided. In this case, the mounting hole 82 and the female thread portion 76 for mounting the fixing pin 74 may be formed in the connection plate body 3 and the actuator 2 in advance according to the number of the fixing pins 74.

Next, an assembly procedure when the valve 1 and the actuator 2 described above are connected together will be described.
As shown in FIGS. 2 and 7, the connecting plate body 3 is positioned and aligned with the valve 1 while the stem shaft mounting portion 6 is fitted in the fitting hole 81 and the flange portion 80 is placed on the mounting portion 9. The male screw 10a is screwed onto the female screw 80b of the flange portion 80 from the lower body 4 side of the flange portion 80 through the through hole 11 of the attachment portion 9, and the bolt 10 is temporarily fixed. Accordingly, the connection plate body 3 is temporarily fixed while being positioned in the lateral direction with respect to the valve 1.

In this state, the port 5a of the valve body 5 is fully opened so as to be parallel to the flow path 4a, while the actuator 2 is also adjusted to the fully open position.
As shown in FIG. 8 (a), the fitting cylinder part 72 is fitted into the fitting recess 71 while the parallel two-surface part 12 is fitted into the concave groove 67, and the connection plate body 3 is interposed between the valve 1 and the actuator 2. The valve 1 and the actuator 2 are temporarily attached. The connection plate body 3 is disposed in the gap S between the outer peripheral top surface portion 8 of the valve 1 and the bottom surface 36 of the actuator 2. At this time, since the flange part 80 and the fitting cylinder part 72 of the connection plate body 3 have a point-symmetric shape, the actuator 2 can be connected to the valve 1 in a state rotated by 180 °.

  Next, the male screw portion 75 of the fixing pin 74 is screwed onto the female screw portion 76, and the tip 74 a of the fixing pin 74 is attached to the attachment hole 82 of the fitting cylinder portion 72. By mounting the fixing pin 74, the actuator 2 is positioned and fixed in a coaxial state with the fitting cylinder portion 72 of the connection plate body 3 fixed to the valve 1. At this time, by tightening the fixing pin 74 while holding the valve 1 and the actuator 2 in the fully opened state, the port 5a becomes parallel to the flow path 4a in the fully opened position of the actuator 2 and is adjusted to a normal mounting position. Positioning.

Further, by finely adjusting the position of the valve 1 in the temporarily fixed state to the flange portion 80 with the bolt 10 with respect to the actuator 2 and fastening the bolt 80 in this state, more accurate positioning can be performed. When the bolt 80 is fixed, the mounting portion 9 is formed so as to protrude in the lateral direction of the body 4, so that the bolt 10 can be tightened from below the mounting portion 9 without interfering with the valve 1. Thereby, the valve 1 and the actuator 2 can be integrated without shifting the fully open position of the actuator 2 and the fully open position of the port 5a with respect to the flow path 4a.
Since the mounting portion 9 and the flange portion 80 are alternately projected, interference with the fitting cylinder portion 72 that is a portion where the connection plate body 3 is attached to and detached from the actuator 2 is avoided, and a space necessary for attachment and detachment is secured. Is done.

  When removing the actuator 2 from the valve 1, the actuator 2 is detached from the valve 1 and the connection plate body 3 by loosening the fixing pin 74 as shown in FIG.

  In this way, the valve 1 and the actuator 2 can be attached and detached via the connection plate body 3. At the time of connection, the insertion hole 81 of the connection plate body 3 is inserted into the stem shaft mounting portion 6 of the body 4, and the actuator 2, the stem 7 and the output shaft 23 are positioned in the coaxial direction and the height direction by fitting the fitting recess 71 in the fitting plate portion 72 of the connection plate body 3, and can be fixed by the connection plate body 3 in this state. . As shown in FIG. 8A, by arranging the connection plate body 3 in the gap S between the valve 1 and the actuator 2, they are integrated while suppressing the overall height when connecting in FIG. 3 and FIG. it can.

  At that time, since the tips 74a of the two fixing pins 74 are mounted in the mounting holes 82 formed in the radial direction, the two fixing pins 74 are fixed while being supported by the two fulcrum portions which are the contact portions of the fixing pins 74. The tilting of the actuator 2 can be prevented, and the fixing pin 74 can be prevented from loosening even when the stem 7 rotates.

  Moreover, the connection plate body 3 can be positioned by fixing the fixing pin 74 to either one of the two female screw portions 76 and the mounting hole 82 formed at the symmetrical position of the connection plate body 3, thereby reducing the maintenance space. However, the fixing pin 74 can be loosened or tightened from an arbitrary lateral direction depending on the connection direction of the valve 1 or the actuator 2. If the fixing position by the fixing pin 74 is changed as necessary, a rotary valve with an actuator can be arranged flexibly in a limited installation space in the device. Since 74 can be attached and detached, it is excellent in workability.

  In this case, by providing the angle θ of the two fixing pins 74 and 74 at an acute angle, it is possible to obtain a friction force that is greater than that when there is only one fixing pin 74, and increasing the friction force by providing the angle θ at a more acute angle. It becomes possible to make it. The increase in the frictional force improves the function of preventing the fixing pins 74 and 74 from rotating in the axial direction and preventing the fixing pins 74 from loosening and coming off.

  The valve 1 and the actuator 2 are connected to each other by a connecting mechanism 90 having a structure for positioning and fixing a detachable portion 73 formed with a pair of female screw portions 76 and 76 and a tip 74a of a fixing pin 74 screwed into the detachable portion 73. The actuator 2 and the connecting plate body can be fixed while preventing backlash, and the mounting hole 82 is formed in a tapered hole portion having a reduced diameter at the tip, and the tapered portion 83 of the fixing pin 74 is mounted in the tapered hole portion 82. The positioning accuracy with 3 is further increased. At this time, since a frictional force acts on the mounting hole 82 from the tapered portion 83, a sufficient tightening strength can be obtained by hand tightening. Furthermore, since the frictional force generated by the thrust of the fixing pin 74 is transmitted to the connection plate body 3, the opposite side connection plate body 3 to which the fixing pin 74 is attached is prevented from being lifted. If there is only one fixing pin 74, when a rotational force in the rotational direction of the stem 7 is generated on the fixing pin 74, the frictional force is greatly reduced by a small amount of operation, and the fixing pin 74 is loosened. It becomes easy to do.

  As described above, in the rotary valve with an actuator of the present invention, the connection plate body 3 for connecting the actuator 2 is fixed to the outer peripheral top surface portion 8 of the body 4 on the stem shaft mounting side, and the actuator 2 is mounted on the connection plate body 3. In addition, since the valve 1 and the actuator 2 are detachably provided by the connection mechanism 90 including a fixing means that is inserted and removed from the lateral direction crossing the axial direction of the stem 7, the connection plate body 3 is connected to the valve 1 and the actuator 2. The connecting mechanism 90 and the reinforcing rib 80c of the connecting plate are accommodated in the region of the gap S when mounted between the actuator 2 and the distance between the actuator 2 and the valve 1 is reduced, and the overall height is kept low so as to be as compact as possible. Can be achieved. This space saving allows easy installation in a narrow installation space while positioning.

  Moreover, the pair of flange portions 80, 80 of the connection plate body 3 are fixed to the pair of attachment portions 9, 9 formed to be equal to or less than the outer peripheral top surface portion 8 of the body 4 with the bolts 10 from below the attachment portion 9. As a result, the height dimension of the attachment / detachment part between the valve 1 and the actuator 2 by the connection plate body 3 can be kept lower, and the insertion recess 71 of the actuator 2 is fitted into the fitting cylinder 72 of the connection plate body 3. By positioning the actuator 2 on the connection plate body 3, the height of the attachment / detachment part between the valve 1 and the actuator 2 by the connection plate body 3 is suppressed to the limit by reducing the height of the stem shaft mounting portion 6. Is also possible. As a result, the entire rotary valve with actuator can be made as compact as possible.

  When connecting the valve 1 and the actuator 2, as described above, the valve 1 and the actuator 2 can be easily integrated while improving the mounting accuracy by fixing them with the fixing pin 74 and the bolt 10 through the connection plate body 3 while being fully opened. It is possible to connect to a predetermined state without adjusting the flow path 4a each time.

  The actuator in this rotary valve with an actuator is provided with a reduction gear group 22 in the lower surface region R of the motor 21 or inside the motor 21, and a protruding cam portion 25 is fixed to the final gear 45 of the reduction gear group 22. The protruding cam portion 25 extends from the bottom surface of the motor 21 and slightly protrudes from the outer periphery of the final gear 45, and the limit switch 24 is disposed in the space region T on the side surface of the motor, and the protruding cam portion 25 rotates. Since the limit switch 24 is brought into and out of operation, a large space is required between the valve 1 and the actuator 2, the actuator 2 is extended upward, and the reduction gear group 22 is disposed. A projecting cam portion 25 is provided while reducing the overall size without greatly extending the entire body in the lateral direction. Ri allowing confirmation of valve opening by viewing.

  In this case, by using the protruding cam portion 25 for turning on / off the limit switch 24 for the valve opening display, the valve opening display portion can be provided in the space-saving space of the actuator 2 with the minimum necessary number of parts. It becomes possible to make it compact.

  Further, an indicator portion 26 is formed by projecting the tip end portion 25b of the protruding cam portion 25 upward along the side surface 21a of the motor 21, and the cover body is provided via a transparent or translucent visual recognition portion 70 provided on the cover body 32. Since the operation state of the indicator part 26 can be visually recognized from the outside of 32, the indicator part 26 can be visually recognized from the upper direction and the side surface direction of the actuator 2 or can be visually recognized from a distant distance. The valve opening can be visually confirmed.

DESCRIPTION OF SYMBOLS 1 Valve 2 Actuator 3 Connection plate body 4 Body 5 Valve body 6 Stem shaft mounting part 7 Stem 8 Outer peripheral top surface part 9 Mounting part 10 Bolt 23 Output shaft 36 Bottom surface 71 Insertion recessed part 72 Fitting cylinder part 73 Attachment / detachment part 74 Fixing pin 74a Tip 76 Female thread portion 80 Flange portion 80a End portion 81 Insertion hole 82 Mounting hole 90 Connection mechanism 84 Head

Claims (7)

  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 on the body, and the outer peripheral surface of the body on the stem shaft mounting side of the body The plate-like connection plate body for connecting the actuator arranged on the outer peripheral top surface portion and the mounting portion protruding to be equal to or less than the outer peripheral top surface portion of the body are fixed on the connection plate body with bolts. A rotary valve with an actuator, wherein the actuator is mounted and the valve and the actuator are detachably provided by a connection mechanism comprising a fixing means that is inserted and removed from a lateral direction crossing the axial direction of the stem. A pair of the mounting portions project and are formed in a state where the mounting portions are alternately formed in the lateral direction at both side surface positions of the body, and the connection plate body is formed with a pair of flange portions in a alternately formed state. The rotary valve with an actuator according to claim 1 , wherein the attachment portion and the flange portion are fixed by the bolt .   A pair of fitting tube portions are formed between the pair of flange portions of the connection plate body, and a fitting recess is formed on the bottom surface surrounding the output shaft of the actuator, and the fitting recess is fitted to the fitting tube portion. The rotary valve with an actuator according to claim 2, wherein the actuator is positioned on the connection plate body.   The rotary valve with an actuator according to claim 3, wherein at least two mounting holes for mounting the tip of the fixing pin are formed in a radial direction on an outer periphery in the horizontal direction of the fitting cylinder portion.   The rotary valve with an actuator according to any one of claims 2 to 4, wherein a fitting hole formed in the connection plate body is fitted and positioned in a stem shaft mounting portion of the body.   5. The connection mechanism has a structure in which an attachment / detachment portion having a pair of female screw portions on the bottom surface of the actuator and a tip of the fixing pin screwed into the attachment / detachment portion are positioned and fixed in the attachment hole. A rotary valve with an actuator described in 1.   The rotary valve with an actuator according to claim 4 or 6, wherein the fixing pin is formed in a head shape that can be tightened and loosened by an arbitrary method at the time of tightening using a tool.

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