JP2012013142A - Mounting structure of valve actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the mounting structure of a valve actuator, which can be made compact as a whole with a simple configuration and enables operation of a valve by commonly using it by an automatic actuator or manual actuator, which enables direct mounting upon mounting of the automatic actuator and improves mounting work efficiency of the valve and the actuator, and which enables an operation while preventing fingers from being pinched, and with which opening and closing of the valve can be accurately controlled.SOLUTION: In the mounting structure of the valve actuator, a mounting cover body 1 is mounted and fixed on the upper face of an axial support part 9 where the stem 8 of a valve body 7 is installed. The mounting cover body 1 includes a substrate 11 having a mounting opening 10, and a hanging side plate 12. The mounting cover body 1 is positioned and fixed to the valve body 7 by screwing a valve fixing bolt 2 from the hanging side plate 12 to an outer circumference face in the upper part of the axial support part 9. An actuator 5 for an automatic operation or a manual actuator 6 for a manual operation can be mounted on the mounting cover body 1.

Description

  The present invention relates to a mounting structure for mounting a valve actuator that automatically or manually drives a valve, and more particularly to a valve actuator mounting structure that is suitable for mounting a valve actuator on a rotary valve such as a ball valve.

Conventionally, for example, when an actuator that is an automatic actuator is attached to a ball valve that is a rotary valve, generally, a substantially U-shaped bracket and a connector are used. The bracket includes a valve and an actuator. The connector is used to connect the valve stem and the actuator output shaft. At that time, an actuator fixing bolt is used for fixing the actuator and the bracket, and a valve fixing bolt is used for fixing the valve and the bracket. As described above, the reason why the actuator is fixed by using a bracket or a connector and the mounting by direct mounting is avoided is that, particularly in the case of a large ball valve, it is necessary to retighten the ground by repeated use. is there.
When installing a manual actuator on this valve, remove the bracket and attach the handle, which is a manual actuator. At this time, provide a stopper for opening and closing 90 degrees on the top of the valve, and operate the handle via this stopper. The valve is controlled to rotate by a predetermined amount.

  On the other hand, Patent Document 1 is a rotary actuator that is mounted on a valve body. The rotary actuator includes a mounting plate that can be mounted on the valve body, and a linear groove or protruding rail formed on the mounting plate. The structure is integrated with the valve body by bolt connection while fitting the groove portion with the groove portion or the protruding rail portion of the actuator.

  A valve equipped with this type of automatic or manual valve actuator may be installed in a limited space such as a dispenser unit. In this case, the port diameter is reduced while minimizing the pressure loss of the valve. Is required to be as large as possible. Therefore, in addition to suppressing the external dimensions of the valve, it is necessary to make the mounting portion of the valve and the actuator compact.

Japanese Patent No. 3133277

  However, since the conventional valve actuator mounting structure is a structure in which an actuator is mounted using a substantially U-shaped bracket, the overall height of the valve including the actuator is increased by the height of the bracket. It was difficult to make the whole compact.

  Moreover, when this actuator is mounted on the valve, the screw must be tightened within the limited space of the bracket, or it must be tightened with the actuator placed on the top surface of the bracket and upside down. For this reason, the mounting workability is deteriorated, and there is a problem that the work becomes more complicated when the actuator is reassembled in the direction rotated 90 degrees with respect to the valve.

  Furthermore, when an actuator compatible with ISO 5211 is attached to the valve, if the mounting screw is tightened from above, the screw head protrudes from the top of the valve, making direct mounting difficult. It is necessary to provide a structure that is newly provided at the upper part of the valve and is screwed with a screw from the lower side of the flange part. This complicates the mounting structure.

On the other hand, when the handle is assembled to the upper part of the valve and manually opened and closed, if there is a small gap between the corners and flanges on the side of the body and the handle to be rotated, there is a risk of fingers being caught between them. In order to prevent this, if the grip portion of the handle is formed in a structure separated from the body and the flange, the entire valve to which the handle is attached becomes larger in the height direction.
Further, when a stopper for manual operation is provided, if this stopper portion is exposed to the outside, there is a risk of fingers being pinched between the rotated stopper and the body during manual operation.

  The present invention has been developed in order to solve the above-mentioned problems. The object of the present invention is to make the whole structure compact and to have a simple structure, and to share a valve with an automatic or manual actuator. A valve actuator mounting structure that can be operated in an automatic manner. When an automatic actuator is installed, direct mounting is possible while improving the workability between the valve and the actuator. When a manual actuator is installed, fingers are prevented from being pinched. However, it is an object of the present invention to provide a valve actuator mounting structure that can be operated while being controlled and that both can accurately control the opening and closing of the valves.

  In order to achieve the above object, according to the first aspect of the present invention, a mounting cover body is placed and fixed on an upper surface of a shaft mounting portion on which a stem of a valve body is mounted, and the mounting cover body has a mounting opening. And a hanging side plate suspended from the outer peripheral edge of the substrate. A valve fixing bolt is screwed onto the outer peripheral surface of the shaft mounting portion from the hanging side plate so that the mounting cover body is positioned and fixed to the valve body. This is a valve actuator mounting structure in which either an automatic actuator actuator or a manual actuator can be mounted.

  The invention according to claim 2 is the valve actuator mounting structure in which the mounting cover body is positioned and fixed by locking the locking pin provided on the outer surface of the shaft mounting portion in the positioning groove formed on the hanging side plate.

  According to a third aspect of the present invention, the annular projection of the actuator actuator is inserted into the mounting opening of the board and positioned, and the actuator is mounted at the mounting position of the actuator actuator from the bolt through hole formed in the board through the actuator fixing bolt. This is a valve actuator mounting structure in which the cover body is screwed and the head of the actuator fixing bolt is housed in the housing groove formed on the upper surface of the shaft mounting portion.

  According to a fourth aspect of the present invention, the manual cap member placed on the upper surface of the shaft mounting portion is interlocked and fixed to the stem, and a stopper portion is formed to project from the outer periphery of the lower end of the manual cap member. The mounting opening of the mounting cover body is fitted to the mounting cover, and the manual handle can be opened and closed by approximately 90 degrees by slidingly locking the stopper portion in the arc groove of approximately 90 degrees formed on the peripheral lower surface side of the mounting opening. It is the provided valve actuator attachment structure.

  The invention according to claim 5 is a valve actuator attachment structure in which a manual handle is attached to a manual cap member.

  According to the first aspect of the present invention, the mounting cover body composed of the substrate and the hanging side plate suspended from the outer peripheral edge of the substrate is positioned and fixed on the upper surface of the shaft mounting portion of the valve body by the valve fixing bolt. The structure can be made simple while reducing the overall size, and the valve can be operated by using an automatic or manual actuator, and the automatic to manual and manual to automatic can be easily changed. When installing an automatic actuator, it is possible to improve the mounting work between the valve and the actuator while enabling direct mounting of the actuator, and when installing a manual actuator, the structure can be operated while preventing fingers from being pinched. In any manual machine, the valve can be accurately controlled to open and close.

  According to the second aspect of the present invention, it is possible to accurately attach the valve actuator and open and close the valve body with high accuracy by fixing the attachment cover body to the valve body while positioning it in a predetermined state. At this time, the cover is rotated and attached to the valve body at a rotation angle of 90 degrees, so that when the valve actuator is an actuator actuator, the valve can be set to either the normally open state or the normally closed state. The mounting direction can be set to an arbitrary direction. When the valve actuator is a handle, the operation direction of the handle and the open / closed state of the valve can be set arbitrarily according to the installation location of the valve body.

  According to the third aspect of the present invention, the mounting cover body and the actuator actuator can be fixed with the actuator fixing bolt in a positioned state, and the valve body can be accurately controlled to open and close by driving the actuator actuator. In this case, since the head of the actuator fixing bolt is housed in the housing groove, the height of the mounting by the mounting cover body can be kept small, leading to overall compactness. Since the actuator actuator and mounting cover body are assembled and the actuator actuator with this mounting cover body is mounted on the valve body, the mounting cover body and the body of the valve body can be fixed. The bolt can be tightened, and it is not necessary to perform the tightening operation with the actuator upside down.

  According to the fourth aspect of the present invention, when the stem is manually rotated, the stopper portion is slidably locked to the arc groove so that the stem can be regulated to a rotation angle of approximately 90 degrees. Accuracy can be increased.

  According to the fifth aspect of the present invention, the valve body can be easily rotated 90 degrees by operating the manual handle, and the manual cap member is built in the mounting cover body, so that the appearance can be simplified and the manual operation can be performed. Since the cap member is also prevented from being exposed to the outside, there is no risk of pinching fingers or the like.

It is sectional drawing which showed the attachment state of the actuator actuator. FIG. 2 is an exploded perspective view of FIG. 1. It is the perspective view which showed the attachment state of the attachment cover body for automatic. It is the principal part enlarged view which showed the attachment state of the attachment cover body for automatic. It is sectional drawing which showed the attachment state of the manual operation machine. It is the perspective view which showed the attachment state of the manual attachment cover body. It is the perspective view which showed the attachment state of the manual cap member. It is a partially omitted plan view of the valve body. It is the schematic diagram which showed the attachment state of the manual cap member. It is the principal part enlarged view which showed the attachment state of the manual cap member.

  Hereinafter, an embodiment of a valve actuator mounting structure according to the present invention will be described in detail with reference to the drawings. In FIG. 1, the attachment state of the actuator actuator is shown, and in FIG. 2, the separated perspective view of FIG. 1 is shown. 3 and 4 show the mounting state of the automatic mounting cover.

  In the figure, this valve actuator mounting structure is configured such that either an automatic actuator actuator 5 or a manual actuator 6 is manually operated by using a mounting cover body 1, a valve fixing bolt 2 and a locking pin 3. The stem 8 is provided so as to be attachable to a shaft mounting portion 9 on which the stem 8 is mounted. First, the case where the actuator actuator 5 is used as a valve actuator will be described.

  In this case, the mounting cover body 1 is provided as an automatic mounting cover body for mounting the actuator actuator 5 to the valve body 7, and includes a substantially disc-shaped substrate 11 having a mounting opening 10 in the center, and the substrate. 11 comprises a drooping side plate 12 that hangs down from the outer peripheral end, and has a substantially cylindrical shape. Bolt through holes 13 are formed radially on the substrate 11 around the mounting opening 10, and in the present embodiment, the bolt through holes 13 are provided at four positions at intervals of approximately 90 degrees with respect to the mounting opening 10. Is formed.

  In FIG. 3, positioning grooves 15 and counterbore holes 16 are alternately formed in the drooping side plate 12 at intervals of 90 degrees, so that the positioning grooves 15 and the counterbore holes 16 are respectively formed on the drooping side plate 12. There are several places. The positioning groove 15 is formed so as to be cut out in a groove shape from the end side of the hanging plate 12, and the locking pin 3 can be locked in the positioning groove 15. The counterbore 16 has a hole diameter into which the valve fixing bolt 2 can be inserted, and the head 2a of the valve fixing bolt 2 can be attached to the seat portion.

  As shown in FIG. 8, the outer peripheral side of the upper portion of the shaft mounting portion 9 of the body 20 constituting the valve body 7 is formed in a cylindrical cutout, and an annular protrusion that can be fitted with the mounting cover body 1 from above. 22 is formed on the upper surface side of the shaft mounting portion 9. On the outer peripheral surface of the annular protrusion 22, female screw portions 23 to which the valve fixing bolt 2 and the locking pin 3 can be screwed are equally arranged at four positions at intervals of approximately 90 degrees. A storage groove 24 is formed on the upper surface of the annular protrusion 22, and a head 25 a of an actuator fixing bolt 25 for fixing the mounting cover body 1 to the actuator actuator 5 can be stored in the storage groove 24. ing.

  On the other hand, an annular convex portion 30 that can be fitted into the mounting opening 10 is formed on the lower side of the actuator actuator 5, and an actuator fixing bolt is provided on the bottom surface side of the actuator actuator 5 via a bolt through hole 13 of the substrate 11. A female screw 31 to which 25 can be screwed is provided.

  The actuator actuator 5 shown in FIGS. 1 to 3 is, for example, a pneumatic actuator, and includes an output shaft 32 connected to the stem 8, a spring member 22 such as a coil spring, a cylinder 37, and double pistons 38 and 38. The pistons 38 and 38 and the spring member 22 are disposed in the cylinder 37. The piston 38 reciprocates by a forward movement activated by air pressure or gas pressure and a backward movement activated by the elastic force of the spring member 33. As a result, the actuator actuator 5 is of a so-called spring return type. . The actuator actuator 5 converts the reciprocating motion of the piston 38 into a forward and reverse rotational motion by a rack and pinion structure with a rack formed on a piston (not shown) and a pinion fixed to a drive shaft, and is connected to an output shaft 32 7 is opened and closed. Further, the operation mechanism of the actuator actuator is not limited to this rack and pinion mechanism, and may be a scatch and yoke mechanism or a link mechanism, for example, and the operation mechanism is not limited.

  Inside the actuator actuator, there is provided a retainer member 34 that can be engaged with a bolt 39 screwed to an end of the cylinder 37 and prevents the spring member 33 from popping out. 35 and an abutting portion 36, and the abutting portion 36 is formed to project from the annular portion 35.

  When the actuator actuator 5 is operated and the piston 38 reciprocates in the cylinder 37, the abutting portion 36 comes into contact with the end portions 37 a on both sides of the cylinder 37, and a stroke (not shown) of the piston 38 is regulated. The rotation angle of the output shaft 32 due to the movement is restricted to a predetermined angle, that is, 90 degrees.

  As described above, in the actuator actuator 5 of this embodiment, the stroke can be determined by the retainer member 34 alone by forming the abutting portion 36 on the retainer member 34, and a predetermined stroke can be obtained only by providing the retainer member 34. Therefore, it is not necessary to adjust the stroke after assembling the actuator actuator 5. Furthermore, since the abutting portion 36 is provided integrally with the retainer member 34, it is not necessary to separately provide a stopper bolt or the like for setting the stroke, and the number of parts and assembly man-hours can be reduced.

When the actuator actuator 5 is attached to the valve body 7, first, the locking pin 3 is screwed onto the female thread portion 23 of the shaft mounting portion 9. In this case, among the four female screw portions 23 formed at intervals of 90 degrees, the locking pins 3 and 3 are fixed to the two opposing female screw portions 23 as shown in FIG.
On the other hand, in FIG. 3, the annular projection 30 of the actuator actuator 5 is fitted into the mounting opening 10 of the substrate 11 to be positioned, and in this state, the bolt 11 is screwed into the female screw 31 through the actuator fixing bolt 25. . As a result, as shown in FIG. 4, the attachment cover body 1 is screwed into a predetermined attachment position of the actuator actuator 5.

  Next, the attachment cover body 1 is attached to the valve body 7 together with the actuator actuator 5. In this case, the mounting cover 1 is positioned and fixed by locking the locking pin 3 provided on the outer side surface of the upper portion of the shaft mounting portion 9 in the positioning groove 15 of the hanging side plate 12 to restrict the movement in the circumferential direction. Then, by mounting the mounting cover body 1 on the upper surface of the shaft mounting portion 9 so that the annular protrusion 22 is fitted to the inner peripheral side of the drooping side plate 12, the actuator actuating machine 5 is provided with a predetermined portion of the shaft mounting portion 9. Mounted in position. At this time, by rotating the mounting cover body 1 with respect to the body main body 20 in advance, the direction of the actuator actuator 5 can be changed every 90 degrees, and the direction of the actuator actuator 5 with respect to the valve body 7 can be changed. By changing, for example, the valve body 7 can be set to a normally closed or normally opened state, or the direction of the long actuator actuator 5 can be changed when the installation place is narrow.

  After the actuator actuator 5 is mounted, the head 25a of the actuator fixing bolt 25 is housed in the housing groove 24 on the top surface of the shaft mounting portion 9, so that the mounting cover body 1 is mounted in a state of being lifted from the top surface side of the shaft mounting portion 9. Is prevented.

  In this state, the mounting cover body 1 can be fixed to the valve main body 7 by screwing the valve fixing bolts 2 into the two female threaded portions 23 from the drooping side plate 12 via the counterbore 16. The actuator 1 can be accurately positioned and fixed at a predetermined position of the valve body 7 by the body 1. When the actuator actuator 5 is operated, the valve body 7 can be opened and closed accurately.

Next, the case where the valve actuator is a manual operation device for manual operation will be described.
FIG. 5 shows a mounting state of the manual operating machine. In the manual mounting structure, a manual cap member 40 and a manual handle 41 are used, and these are operated as a manual operating machine by a manual mounting cover body 42. It is attached to the main body 7.

  As shown in FIGS. 5, 6, and 10, the manual attachment cover 42, like the automatic attachment cover 1, is suspended from the substrate 44 having the attachment opening 43 and the outer peripheral edge of the substrate 44. And a drooping side plate 45. In FIG. 9, an arc groove 46 capable of restricting rotation by about 90 degrees is formed on the lower surface side of the peripheral edge of the mounting opening 43, and the positioning groove 15 and counterbore holes 16 are spaced by 90 degrees on the hanging side plate 45. It is formed in two places alternately.

  In FIG. 7, the cap member 40 has a substantially columnar shape, and two stopper portions 47, 47 project from the lower end outer periphery of the cap member 40. The stopper portions 47 are formed at intervals of about 180 degrees and are provided so as to be housed in the arc grooves 46. A substantially square-shaped fitting hole 48 is formed on the bottom surface side of the cap member 40, and a parallel four-surface part 8 a formed at the upper end of the stem 8 can be fitted into the fitting hole 48. . The stem 8 can be rotated via the cap member 40 by the fitting of the parallel four-surface portion 8a into the fitting hole portion 48. On the side surface of the cap member 40, a mounting hole 49 for attaching the manual handle 41 and partially semicircular is formed.

  The manual handle 41 is formed in an appropriate shape, and a substantially semicircular insertion portion 50 that can be inserted into the attachment hole 49 is formed on the attachment side of the manual handle 41 to the cap member 40. A female screw 51 is provided on the distal end surface side of the insertion portion 50. On the other hand, a grip portion 52 is formed on the other end side of the loading portion 50, and the manual handle 41 can be rotated via the grip portion 52.

  When the manual handle 41 and the cap member 40 are attached to the valve body 7 as a manual operating device, the cap member 40 is placed on the upper surface of the shaft mounting portion 9 while fitting the parallel four surface portions 8a into the fitting holes 48. The cap member 40 is interlocked and fixed to the stem 8. Then, the mounting cover 43 is placed on the body main body 20 while fitting the mounting opening 43 into the cap member 40 and sliding the cap member stopper portion 47 into the arc groove 46. The body 42 is fixed to the valve body 7 by the locking pin 3 and the valve fixing bolt 2. Thereby, the cap member 40 can be attached to the stem 8 in the correct orientation via the attachment cover body 42.

  Subsequently, the manual handle 41 is fixed to the cap member 40 by inserting the insertion portion 50 of the manual handle 41 into the mounting hole 49 and screwing the fixing bolt 53 to the female screw 51. When the manual handle 41 is rotated, the stopper portion 47 is slidably engaged with the arc groove 46, whereby the rotation of the cap member 40 is restricted to approximately 90 degrees, and the manual handle 41 can be opened and closed approximately 90 degrees. ing. For this reason, even when the manual handle 41 is operated, the valve body 7 can be opened and closed accurately by a rotation operation of approximately 90 degrees, as in the case of the actuator actuator 5, and highly accurate opening and closing even when high-pressure fluid flows inside. Control is possible.

The valve body 7 to which the above-described automatic or manual valve actuator is mounted is a rotary valve, and is a valve that is opened and closed by 90-degree rotation, such as a ball valve, and is suitable for a high-pressure fluid valve. ing.
The valve body 7 has a structure of a trunnion type ball valve in which a ball 60 is provided inside, and seal mechanisms 61 for sealing contact with the ball 60 are disposed at both side positions of the ball 60. The body 20 constituting the valve body 7 is composed of a body 62 and cap bodies 63, 63 provided on the primary side and the secondary side of the body 62, respectively. Has been.

  The body 62 is formed in a substantially square shape, and the body body 20 is configured by screwing the cap bodies 63 and 63 in a state where the gasket 64 is sandwiched between both sides of the body 62. A mounting hole 67 for mounting a later-described seat retainer 66 is provided on the inner peripheral surface of the cap body 63, and the seat retainer 66 is provided in the mounting hole 67 so that the seat retainer 66 can be fitted. A mounting groove 69 for mounting a seal member 68 described later is formed in the mounting hole 67, and this mounting groove 69 is provided on the inner peripheral surface side of the body main body 20 located on the outer peripheral surface 66a of the seat retainer 66. Yes. In addition, the mounting hole 67 is formed with an enlarged groove 71 for mounting the spring member 70. Further, a female thread portion 72 is formed in communication with the other side of the mounting hole 67, and an external joint 73 can be screwed to the female thread portion 72. The cap body 63 can be integrated with the body 62 by a joining means such as adhesion or welding.

  The seal mechanism 61 includes a ball seat 75, the above-described seat retainer 66, a spring member 70, and a seal member 68. Among these, the ball sheet 75 is formed in an annular shape capable of sealing contact with the ball surface 60 a of the ball 60. The ball sheet 75 preferably has a small-diameter shape. In this case, the ball sheet 75 is difficult to hug the ball 60 and can avoid sticking.

  The seat retainer 66 is provided to place and seal the ball seat 75 at a predetermined position of the ball 60, and has a diameter-expanded portion 76 disposed on the ball 60 side and a diameter smaller than the diameter-expanded portion 76. And a cylindrical portion 77. A ball sheet 75 is attached to a groove-like portion formed at the tip of the enlarged diameter portion 76. Further, an internal flow path 79 is formed in the seat retainer 66.

  As will be described later, the cylindrical portion 77 of the seat retainer 66 has a sealing member 68 and a backup ring 80 disposed on the body main body 20 side, and is formed in a straight shape with the same outer diameter. The seat retainer 66 can be moved in the direction of the flow path by being inserted into the 69. A sealing member 68 is in close contact with the outer peripheral surface of the cylindrical portion 77, and the cylindrical portion 77 is sealed by the sealing member 68 when the seat retainer 66 moves in the flow path direction.

  The spring member 70 is composed of, for example, a coil spring, and is mounted between the expanded diameter groove portion 71 and the expanded diameter portion 76 of the seat retainer 66 fitted into the mounting hole 67. A resilient force is applied to the ball seat 75 side. The spring member 70 may be a disc spring.

  The seal member 68 is made of, for example, a rubber O-ring, and is mounted in the mounting groove 69 together with the backup ring 80. Accordingly, the seal member 68 is disposed on the outer peripheral surface 66a of the seat retainer 66 on the inner peripheral side on the body main body 20 side. . The backup ring 80 is made of, for example, PTFE (polytetrafluoroethylene). The seal member 68 and the backup ring 80 may be formed of different materials. In this case, it is preferable to use a soft material similar to rubber or PTFE, respectively, and when a soft material is used. Is deformed into the mounting groove 69 to facilitate mounting. The seal member 68 is mounted in the mounting groove 69 with the backup rings 80, 80 disposed on both sides, and both sides are protected by the backup rings 80, 80.

  The ball 60 has a shaft portion 60 b on the upper side and a trunnion (lower stem) 60 c on the lower side, and the shaft portion 60 b and the lower stem 60 c are rotatably mounted in the body 62 via a bearing 81. When the ball 60 is rotated by the stem 8 and the communication hole 60d formed in the ball 60 communicates with the internal flow path 79 of the seat retainer 66, the fluid can flow.

  The valve body 7 exerts a pressing force by the seal mechanism 61 by the elastic force that the spring member 70 applies to the seat retainer 66 with the above-described configuration and the fluid pressure set on the inner diameter side of the seal member 68. The high-pressure fluid can be sealed by the heavy seal method.

  Further, a packing 83, a packing washer 84, a thrust ball bearing 85, a gland 86, and a bush 87 are arranged around the stem 8 of the valve body 7, and the packing 83 inserted into the packing washer 84 is mounted on the shaft. It has a shaft seal structure.

  As shown in FIG. 1, the stem 8 is provided so as to penetrate from the valve cavity 89 in the body main body 20 to the outer side of the body main body 20 which is an atmospheric pressure portion. The load in the thrust direction is applied by the fluid pressure acting on the. A flange 90 is formed on the stem 8, and a thrust load is applied to the thrust ball bearing 85 through the flange 90. The thrust ball bearing 85 is interposed between the flange 90 and the packing washer 84 and is held by the packing washer 84.

  The packing washer 84 is composed of a bottomed cylindrical body having a cylindrical portion 91 and a bottom portion 92, and the packing 83 is provided on the inner side so that the packing 83 can be inserted. Accordingly, when the packing 83 is inserted into the packing washer 84, the packing washer 84 is disposed on the cavity 89 side of the packing 83. At the upper end of the packing washer 84, a notch groove 93 for leak conduction is formed.

  A thrust load for high-pressure fluid is applied to the packing washer 84, and this thrust load is supported by a gland 86 that is a part of the valve body 7. Since the outer periphery of the stem 8 is in rotational contact with the inner peripheral edge portion of the through hole portion 94 formed in the bottom portion 92, the packing washer 84 has good slidability, for example, aluminum bronze that does not bite with the stem 8 made of stainless steel, etc. It is desirable to be formed of the material.

  The packing 83 inserted into the packing washer 84 is a laminated V-packing. Annular grooves 83a and 84a are formed in the lower portion of the inner and outer peripheral surfaces of the laminated V packing 83 and the lower portion of the outer peripheral surface of the packing washer 84, respectively. In the annular grooves 83 a and 84 a, a sealing O-ring 95 and a metal backup ring 96 are mounted on the upper surface side of the O-ring 95, a lower portion of the inner and outer peripheral surfaces of the packing washer 84, and an inner peripheral surface of the packing 83 An O-ring 95 and a backup ring 96 are disposed in the lower part. The backup ring 96 may be, for example, PEEK (polyether ether ketone) or PTFE (polytetrafluoroethylene) that is generally used. When the O-ring 95 is made of general rubber, the backup ring 96 is By making the material harder than the O-ring 95, the O-ring 95 can be protected. In this way, by providing the backup ring 96, a double seal structure is provided, and the sealing performance is improved by this double seal structure. Furthermore, since the secondary side of the backup ring 96 is the packing 83, higher sealing performance can be exhibited.

  As described above, on the outer peripheral side of the stem 8, the outer peripheral side of the packing 83, and the outer peripheral side of the packing washer 84, the shaft seal structure by the O-ring 95 and the backup ring 96 is provided. These are provided with a composite seal structure. In this composite seal structure, the stem 8 rotates on the outer periphery side of the stem 8 to slide and seal against the packing 83, and becomes a fixed seal on the outer periphery side of the packing 83 and the outer periphery of the packing washer 84. Therefore, the packing 83 is rotated while being slidably sealed with respect to the packing washer 84.

  Here, the fluid is basically sealed by the O-ring 95 and the backup ring 96. While the fluid such as a gas body enters the material constituting the O-ring 95 due to the pressure of the fluid and receives a load. Even if the sealing function can be exhibited, there is a possibility that when the load due to the fluid pressure is relaxed, the gas body enclosed in the wire diameter direction of the O-ring 95 is released and flows out to the outside. In the present embodiment, a packing 83 is provided in the valve body 7 to prevent leakage at the time of pressure relaxation. In this case, since the outer diameter side of the packing washer 84 does not become a sliding seal, the seal structure is composed of only the O-ring 95 and the backup ring 96.

  At this time, the reason for arranging the O-ring 95 and the backup ring 96 at the lower part of the packing washer 84 is that the O-ring 95 and the backup ring 96 are provided on the upper side of the packing washer 84 and sealed. In this case, the packing washer 84 may be deformed by the pressure of the fluid to adversely affect the sealing performance of the packing 83. For this reason, the O-ring 95 and the backup ring 96 are positioned below the seal point on the outer diameter side of the packing 83.

The ground 86 is formed in a substantially cylindrical shape, and has an annular flange 97 and a lid 98. The annular flange 97 can be fitted to the outer peripheral side of the packing washer 84 in which the packing 83 is inserted, and the upper part of the packing 83 and the packing washer 84 can be covered by the lid 98. The gland 86 is integrally fixed to the mounting recess 100 formed in the upper opening 99 of the valve body 7 by screwing, and the gland 86 presses the packing 83 and the packing washer 84 in a direction against the fluid pressure. The thrust load of the packing washer 84 is supported on the lower surface side of the gland 86. At this time, the gland 86 does not tighten the packing 83, and the gland 86 is positioned by the front end side of the gland 86 abutting against the bottom surface side of the mounting recess 100. For this reason, the packing 83 exhibits a self-sealing function based on fluid pressure, not an external load.
A bush 87 is mounted on the inner peripheral surface side of the ground 86, and the stem 8 is prevented from tilting by the bush 87.

  A leak port 101 communicating with the outside is formed at a portion of the valve body 7 located on the side surface of the packing washer 84, and the leak port 101 communicates with the inside of the valve body 7 through a notch groove 93. The leak port 101 is provided on the upper side of the O-ring 95 attached to the packing washer 84. The fluid leaking from the outer diameter side of the stem 8 and the outer diameter of the packing 83 is surely discharged to the outside through the notch groove 93 and the leak port 101 and is prevented from staying in the valve body 7.

Note that the upper portion of the shaft mounting portion 9 may have a prismatic shape similar to that of the valve body 7 and the mounting cover body may have a substantially rectangular tube shape so as to correspond to the prismatic shape. According to these square shapes, positioning can be performed by the corner portions, and the locking pins 3 can be omitted.
On the other hand, from the viewpoint of weight reduction and rotational operability during manual operation, it is preferable that the upper portion of the shaft mounting portion 9 is a columnar shape and the mounting cover body is a cylindrical shape.

Then, the effect | action in the said embodiment of the valve actuator attachment structure of this invention is demonstrated.
In the valve actuator mounting structure according to the present invention, the mounting cover body 1 is placed and fixed on the upper surface of the shaft mounting portion 9 of the valve body 7, and the mounting cover body 1 includes a substrate 11 and a hanging plate 12. Since the mounting cover body 1 is positioned and fixed to the valve main body 7 by screwing the valve fixing bolt 2 to the valve main body 7, the dimension in the height direction when the mounting cover body 1 is mounted is suppressed, and the valve main body 7 and the actuator actuator The whole can be made compact in any case where any of the valve actuators 5 or the manual actuator 6 is attached. Moreover, since the mounting cover body 1 accommodating the fixing portion with the actuator actuator 5 is used inside the drooping side plate 12 provided with the fixing portion with the valve body 7, the entire valve with the actuator provided integrally therewith is used. The height dimension of can be made smaller. Further, only the substrate 11 of the mounting cover body 1 is interposed between the valve body 7 and the actuator actuator 5, and the height dimension of the entire valve integrally provided with the actuator is reduced. It is a factor that can be.

  In this case, since the mounting cover body 1 is positioned and fixed by locking the locking pin 3 in the positioning groove 15 of the drooping side plate 12, the valve actuator is accurately mounted on the valve body 7 and is high during operation. The ball 60 can be opened and closed with high accuracy.

  According to the valve actuator mounting structure of the present invention, the valve body 7 and the actuator actuator 5 can be brought close to each other, so that the stem 8 of the valve body 7 and the output shaft 32 of the actuator actuator 5 are connected to each other by a connector or the like. Direct connection can be made without interposing parts and while suppressing the length of the stem 8 and the output shaft 32.

  When the actuator actuator 5 is attached to the valve body, it is attached to the attachment position of the actuator actuator 5 with the actuator fixing bolt 25 in a state where the annular protrusion 30 is fitted into the attachment opening 10 and the actuator actuator 5 is positioned. Since the cover body 1 is screwed and the head 25a of the actuator fixing bolt 25 is housed in the housing groove 24, the actuator actuator 5 and the mounting cover body 1 can be fixed in a wide space. The valve body 7 can be easily attached from the side surface of the attachment cover body 1. In addition, since the mounting cover body 1 previously attached to the actuator actuator 5 can be positioned and mounted so as to be covered from the upper surface side of the shaft body 9 of the valve body 7, the valve body 7 is fixed by turning the top of the actuator actuator 5 upside down. There is no need to do so, and the assembly workability is increasing.

  When reassembling the actuator actuator 5 in the rotated state, the bolt 2 for fixing the valve is removed and the actuator cover 5 together with the actuator actuator 5 is lifted up from the valve body 7 and removed. 3 is replaced, and the direction of the actuator actuator 5 is rotated, and then placed on the shaft mounting portion 9 and the valve fixing bolt 2 is screwed, so that it can be easily reassembled by a simple assembling operation. Moreover, it is possible to make this mounting structure conform to ISO.

  On the other hand, when the manual actuator 6 is attached to the valve body 7, a cap member 40 having a stopper portion 47 on the outer periphery of the lower end is placed on the upper surface of the shaft mounting portion 9 and is interlocked and fixed to the stem 8. Since the mounting opening 43 of the mounting cover body 42 is fitted, and the stopper 47 is slidably locked in the arc groove 46 of the mounting opening 43 so that the manual handle 41 can be opened and closed approximately 90 degrees. It is possible to prevent fingers from being caught in this stopper structure when gripping and operating 41, and it is not necessary to provide a predetermined space between them, so that the manual handle 41 needs to be formed in a special shape. The overall size can be reduced.

  Moreover, as described above, the manual handle 41 is provided between the actuator mounting portion and the manual handle 41 by the structure in which the substantially cylindrical mounting cover body 42 is attached to the upper portion of the shaft mounting portion 9 that is formed in a columnar shape. Therefore, when the manual handle 41 is rotated, fingers are held between the manual handle 41 and the valve body 7 (including the mounting cover body 42 and the upper portion of the shaft mounting portion 9). Risk is reduced.

DESCRIPTION OF SYMBOLS 1,42 Mounting cover body 2 Valve fixing bolt 3 Locking pin 5 Actuator actuator 6 Manual actuator 7 Valve body 8 Stem 9 Shaft part 10, 43 Mounting opening 11 Substrate 12 Drooping side plate 13 Bolt through hole 15 Positioning groove 24 Storage Groove 25 Actuator Fixing Bolt 25a Head 30 Annular Convex 40 Cap Member 41 Manual Handle 46 Arc Groove 47 Stopper

Claims (5)

  A mounting cover body is mounted and fixed on the upper surface of the shaft mounting portion on which the stem of the valve body is mounted. The mounting cover body includes a substrate having a mounting opening and a drooping side plate suspended from the outer peripheral edge of the substrate. The valve fixing bolt is screwed onto the outer peripheral surface of the upper part of the shaft mounting portion from the hanging side plate to position and fix the mounting cover body to the valve body, and an automatic actuator actuator or a manual hand is attached to the mounting cover body. A valve actuator mounting structure characterized in that any of the operating motives can be mounted.   The valve actuator mounting structure according to claim 1, wherein the mounting cover body is positioned and fixed by locking a locking pin provided on an outer surface of the shaft mounting portion in a positioning groove formed in the hanging side plate.   An annular convex portion of the actuator actuator is inserted into the mounting opening of the board and positioned, and the mounting cover body is screwed to the mounting position of the actuator actuator through the actuator fixing bolt from the bolt through hole formed in the board. The valve actuator mounting structure according to claim 1 or 2, wherein the head of the actuator fixing bolt is housed in a housing groove formed on an upper surface of the shaft mounting portion.   The manual cap member mounted on the upper surface of the shaft mounting portion is interlocked and fixed to the stem, and a stopper portion is formed on the outer periphery of the lower end of the manual cap member, and the mounting cover body is attached to the manual cap member. And the stopper is slidably locked into a substantially 90-degree arc groove formed on the peripheral lower surface side of the mounting opening so that the manual handle can be opened and closed by about 90 degrees. The valve actuator mounting structure according to claim 1 or 2.   The valve actuator attachment structure according to claim 4, wherein a manual handle is attached to the manual cap member.

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