JP2018025216A - Valve rod temporary fixing structure, valve, and temporary fixing cover member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary fixing structure for a valve rod which is capable of achieving downsizing and lightweighting of a valve.SOLUTION: In a valve 1, a valve body 3 is rotated integrally with a valve rod 4 so as to open/close a flow channel 5 in a valve box 2, an opening/closing actuator 7 for rotating the valve rod 4 is detachably disposed at one end of the valve rod 4, and the other end of the valve rod 4 is rotatably inserted into a rod hole 13 formed in the valve box 2. A temporary fixing structure temporarily fixes the valve rod 4 of the valve 1. Constraint means 25, 31, and 32 for constraining the valve rod 4 in a rotation direction are disposed at the other end of the valve rod 4 and a region of the valve box 2 which faces the other end of the valve rod 4.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a temporary fixing structure for temporarily fixing a valve rod temporarily, for example, when a switching actuator such as a butterfly valve is removed from the valve rod and maintenance is performed. The present invention relates to a valve having a structure and a cover member for temporary fixing.

  Conventionally, as shown in FIG. 40, an operating device 152 is provided at one end of the valve stem 151 of the butterfly valve 150, and the operating device 152 decelerates the rotation input to the input shaft 153 and the input shaft 153. And a reduction gear mechanism 154 that outputs to the valve stem 151.

  By fitting the T-shaped operation handle 155 to the input shaft 153 and turning the operation handle 155, the input shaft 153 rotates, and the rotation of the input shaft 153 is decelerated by the reduction gear mechanism 154 and transmitted to the valve stem 151. Then, the valve stem 151 rotates around the axis, and the valve body 156 rotates to open and close the flow path in the valve box 157.

  Normally, the valve body 156 is stopped in an open state or a closed state, and the valve body 156 at this time is constrained by the operating device 152 via the valve rod 151, and therefore water flows in the pipe line. The valve body 156 does not rotate carelessly (in the case of a water flow state) or when water pressure is applied.

  However, when performing maintenance of the operating unit 152, if the operating unit 152 is removed from the valve stem 151, the restraint of the valve body 156 is released, so that the valve body 156 rotates carelessly and a water hammer or the like There was a risk of occurrence. For this reason, it is necessary to perform maintenance with the operating device 152 attached to the valve stem 151, and there has been a problem that the maintenance work requires a lot of time and effort.

  As a countermeasure against the above problem, as shown in FIG. 41, a temporary fixing member 161 that temporarily fixes the valve body 156 in the fully open position and the fully closed position is provided between the boss portion 162 of the valve box 157 and the operating device 152. There is something. The temporary fixing member 161 is an annular member, and includes a first fixing hole 164 and a second fixing hole (not shown) that are orthogonal to each other in the diameter direction. In addition, a through hole 166 that penetrates in the diameter direction is formed at one end of the valve stem 151.

  According to this, when the valve body 156 is rotated to the fully open position, the first fixing hole 164 and the through hole 166 are arranged in a straight line and communicate with each other, so that the fixing rod 167 is connected to the first fixing hole 164 and the through hole. By passing through 166, the valve body 156 is temporarily fixed in the fully open position.

  Further, when the valve body 156 is rotated to the fully closed position, the second fixing hole and the through hole 166 are arranged and communicated with each other, so that the fixing rod 167 is connected to the second fixing hole and the through hole 166. By inserting, the valve body 156 is temporarily fixed in the fully closed position.

  In this manner, with the valve body 156 temporarily fixed at the fully open position or the fully closed position, the operating device 152 can be removed from the valve rod 151 and maintenance of the operating device 152 can be performed. Thereby, the labor and time for maintenance work of the operating device 152 can be greatly reduced, and the valve body 156 is not inadvertently rotated, and the occurrence of a water hammer or the like can be prevented.

  In addition, the butterfly valve provided with the above temporary fixing members is described in the following patent document 1, for example.

JP2016-84825A

  However, in the above-described conventional type, the temporary fixing member 161 is provided between the boss portion 162 of the valve box 157 and the operating device 152, and the valve rod 151 passes through the temporary fixing member 161 and is connected to the operating device 152. Therefore, it is necessary to lengthen the valve stem 151 in accordance with the height H of the temporary fixing member 161, and there is a problem that the butterfly valve 150 is increased in overall size and weight.

  An object of the present invention is to provide a valve stem temporary fixing structure, a valve, and a temporary fixing cover member that can reduce the size and weight of the valve.

In order to achieve the above object, according to the first aspect of the present invention, the valve body rotates integrally with the valve stem to open and close the flow path in the valve box,
At one end of the valve stem, an opening / closing actuator for rotating the valve stem is provided detachably,
The other end of the valve stem is a temporary fixing structure that temporarily fixes the valve stem of the valve that is rotatably inserted into a rod hole formed in the valve box,
The other end of the valve stem and the portion of the valve box facing the other end of the valve stem are provided with restraining means for restraining the valve stem in the rotational direction.

  According to this, since the valve stem is restrained in the rotation direction by the restraining means, the valve stem is temporarily (temporarily) fixed. In this state, the opening / closing actuator is removed from the valve stem, Maintenance can be performed. At this time, the valve body does not rotate carelessly, and generation of a water hammer or the like can be prevented.

  In addition, since the restraining means is provided at the other end of the valve stem and the portion facing the other end of the valve stem of the valve box, there is no need to lengthen the valve stem according to the restraining means. Can be reduced in size and weight.

In the temporary fixing structure of the valve stem in the second invention, the restraining means has a convex portion and a concave portion,
Either one of the convex part and the concave part is provided at the other end of the valve stem, and the other is provided detachably on the valve box,
The convex portion and the concave portion are detachable.

  According to this, the valve rod is restrained in the rotation direction by the restraining means by attaching one of the convex part and the concave part to the valve box.

  The temporary fixing structure of the valve stem according to the third aspect of the invention is that the restraining means is detachably attached to the valve box and closes the opening of the rod hole from the outside, and the other end of the valve stem. It is what is provided.

  According to this, by attaching the temporarily fixing cover member to the valve box, the valve stem is restrained in the turning direction by the restraining means. As a result, the valve stem is temporarily (temporarily) fixed. In this state, the opening / closing actuator can be removed from the valve stem, and maintenance of the opening / closing actuator can be performed. At this time, the valve body does not rotate carelessly, and generation of a water hammer or the like can be prevented.

  Further, since the restraining means is provided at the other end of the valve stem and the temporary fixing cover member, it is not necessary to lengthen the valve stem in accordance with the restraining means, thereby reducing the size and weight of the valve. .

In the temporary fixing structure of the valve stem in the fourth invention, the restraining means has a convex portion and a concave portion,
Either one of the convex part and the concave part is provided on the other end of the valve stem, and the other is provided on the temporary fixing cover member,
The convex part and the concave part are detachable in the axial direction of the valve stem.

  According to this, by attaching the temporarily fixing cover member to the valve box, the convex portion is fitted into the concave portion, and the valve rod is restrained in the rotation direction.

  Moreover, since either one of the convex part and the concave part is provided at the other end part of the valve stem and the other is provided at the temporary fixing cover member, it is necessary to lengthen the valve stem according to the restraining means. This makes it possible to reduce the size and weight of the valve.

The temporary fixing structure of the valve stem according to the fifth aspect of the invention includes a valve stem having a valve stem body provided on the valve body and an adjusting member provided at the other end of the valve stem body,
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
A recess is provided in the adjustment member;
The convex portion is provided on the temporarily fixing cover member.

  According to this, by attaching the temporarily fixing cover member to the valve box, the convex portion fits into the concave portion, the adjusting member is restrained in the turning direction by the restraining means, and the valve stem body also turns via the adjusting member. Restrained in direction.

  In addition, since the concave portion is provided on the valve rod adjusting member and the convex portion is provided on the temporary fixing cover member, it is not necessary to lengthen the valve rod according to the restraining means, thereby reducing the size of the valve. The weight can be reduced.

The temporary fixing structure of the valve stem according to the sixth aspect of the invention includes a valve stem having a valve stem body provided on the valve body and an adjusting member detachably provided at the other end of the valve stem body.
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
A recess is provided at the other end of the valve stem body,
The convex portion is provided on the temporarily fixing cover member.

  According to this, by removing the adjustment member from the other end of the valve stem body and attaching the temporarily fixing cover member to the valve box, the convex portion fits into the concave portion, and the valve stem body is rotated in the rotation direction by the restraining means. Be bound.

  In addition, since the concave part is provided in the valve stem body and the convex part is provided in the temporary fixing cover member, it is not necessary to lengthen the valve stem according to the restraining means, thereby reducing the size and weight of the valve can do.

  The temporary fixing structure of the valve stem according to the seventh aspect of the invention is such that the temporary fixing cover member has a reverse orientation of a restraining posture in which the convex portion and the concave portion are fitted and an unconstrained posture in which the convex portion and the concave portion are separated. It can be attached to the valve box in a posture.

  According to this, by attaching the temporarily fixing cover member to the valve box in a restraining posture, the convex portion is fitted into the concave portion, and the valve rod is restrained in the rotational direction. In this manner, with the valve stem restrained, the opening / closing actuator is removed from one end of the valve stem, and maintenance of the opening / closing actuator is performed, and then the opening / closing actuator is provided at one end of the valve stem. As a result, the valve stem is restrained in the rotation direction by the opening / closing actuator.

  Thereafter, the temporarily fixing cover member is once removed from the valve box, and the front and back sides are reversed, and then attached to the valve box in an unrestrained posture. Thereby, the convex portion and the concave portion are separated, and the restraint of the valve stem by the temporary fixing structure is released, so by operating the opening and closing actuator, the valve stem is rotated around the axis together with the valve body, The opening degree of the valve body can be changed.

In the temporary fixing structure of the valve stem in the eighth invention, the restraining means has an external gear and an internal gear,
The external gear and the internal gear mesh with each other in the rotation direction of the valve stem,
One of the external gear and the internal gear is provided at the other end of the valve rod, and the other gear is provided at the temporary fixing cover member.

  According to this, by attaching the temporarily fixing cover member to the valve box, the external gear and the internal gear mesh, and the valve stem is restrained in the rotational direction. As described above, by restraining the valve rod using the external gear and the internal gear, the valve body is temporarily fixed at the fully closed position or the fully open position, or at any opening between the fully closed position and the fully open position. can do.

In the ninth invention, the valve body rotates integrally with the valve stem to open and close the flow path in the valve box,
At one end of the valve stem, an opening / closing actuator for rotating the valve stem is provided detachably,
The other end of the valve stem is rotatably inserted into a rod hole formed in the valve box,
A first restraining means for restraining the valve stem in the rotation direction is provided at the other end of the valve stem.

The tenth aspect of the present invention is a temporary fixing cover member that is detachably attached to the valve box of the valve described in the ninth aspect of the invention and closes the opening of the rod hole from the outside,
A second restraining means for restraining the valve stem in the rotation direction;
The second restraining means is detachable from the first restraining means in the axial direction of the valve stem.

  According to this, by attaching the temporarily fixing cover member to the valve box of the valve described in the ninth invention, the second restraining means is fitted to the first restraining means, and the valve stem is restrained in the rotation direction. The As a result, the valve stem is temporarily (temporarily) fixed. In this state, the opening / closing actuator can be removed from the valve stem, and maintenance of the opening / closing actuator can be performed.

  As described above, according to the present invention, since the valve stem is restrained in the rotation direction by the restraining means, the valve stem is temporarily (temporarily) fixed, and in this state, the opening / closing actuator is removed from the valve stem, Maintenance of the opening / closing actuator can be performed. At this time, the valve body does not rotate carelessly, and generation of a water hammer or the like can be prevented.

  In addition, by attaching the temporary fixing cover member to the valve box, the valve stem is restrained in the rotational direction by the restraining means, whereby the valve stem is temporarily (temporarily) fixed. The motive can be removed from the valve stem and maintenance of the opening / closing actuator can be performed.

  Further, since the restraining means is provided at the other end of the valve stem and the temporary fixing cover member, it is not necessary to lengthen the valve stem in accordance with the restraining means, thereby reducing the size and weight of the valve. .

It is sectional drawing of the butterfly valve in the 1st Embodiment of this invention, Comprising: The fully closed state at the time of normal operation is shown. It is a XX arrow line view in FIG. FIG. 6 is a partially enlarged cross-sectional view of the other end of the second valve rod and the cover member during normal operation of the butterfly valve. It is a figure of the 2nd valve rod of a butterfly valve. It is a XX arrow line view in FIG. It is sectional drawing of a butterfly valve, Comprising: The cover member for temporary fixation is attached, and the state which restrains the valve stem with the restraint means is shown. FIG. 6 is a partially enlarged cross-sectional view of the other end portion of the second valve rod and the temporary fixing cover member when the temporary fixing cover member is attached to the butterfly valve. It is a front view of the cover member for temporary fixation attached to a butterfly valve. It is a XX arrow line view in FIG. It is a figure of the 2nd valve rod of a butterfly valve in a 2nd embodiment of the present invention. It is a XX arrow line view in FIG. It is a front view of the cover member for temporary fixation attached to a butterfly valve. It is a XX arrow line view in FIG. It is sectional drawing of a butterfly valve, Comprising: The cover member for temporary fixation is attached, and the state which restrains the valve stem with the restraint means is shown. FIG. 6 is a partially enlarged cross-sectional view of the other end portion of the second valve rod and the temporary fixing cover member when the temporary fixing cover member is attached to the butterfly valve. It is a partial expanded sectional view of the other end part of the 2nd valve stem when a cover member for temporary fixation is attached to a butterfly valve in a 3rd embodiment of the present invention in a restraint posture, and a cover member for temporary fixation. FIG. 6 is a partially enlarged cross-sectional view of the other end portion of the second valve rod and the temporary fixing cover member when the temporary fixing cover member is attached to the butterfly valve in an unconstrained posture. It is sectional drawing of the butterfly valve in the 4th Embodiment of this invention, Comprising: The fully closed state at the time of normal operation is shown. FIG. 6 is a partially enlarged cross-sectional view of the other end of the second valve rod, the cover member, and the adjustment member during normal operation of the butterfly valve. It is a front view of the adjustment board of the adjustment member of a butterfly valve. It is a XX arrow line view in FIG. It is a figure of the other end surface of the 2nd valve rod of a butterfly valve. It is a XX arrow line view in FIG. It is a YY arrow line view in FIG. FIG. 6 is a front view of a cover member attached to the butterfly valve during normal operation. It is a XX arrow line view in FIG. FIG. 5 is a partially enlarged cross-sectional view of the other end of the second valve rod and the temporary fixing cover member when the butterfly valve cover member and the adjustment member are removed and the temporary fixing cover member is attached to the butterfly valve. . It is a front view of the cover member for temporary fixation attached to a butterfly valve. It is a XX arrow line view in FIG. It is a front view of the cover member for temporarily fixing attached to the butterfly valve in the 5th Embodiment of this invention. It is a XX arrow line view in FIG. FIG. 6 is a partially enlarged cross-sectional view of the other end of the second valve rod, the temporary fixing cover member, and the adjustment member when the butterfly valve cover member is removed and the temporary fixing cover member is attached to the butterfly valve. It is a partial expanded sectional view of the butterfly valve in the 6th Embodiment of this invention, and shows the state which restrained the valve rod with the gear-type restraining means. It is a front view of the external gear of the restraining means which restrains the valve stem of a butterfly valve. It is a XX arrow line view in FIG. It is a front view of the cover member for temporary fixation attached to a butterfly valve. It is a XX arrow line view in FIG. FIG. 4 is a partially enlarged cross-sectional view of the butterfly valve, showing a state in which the external gear is removed and the restriction of the valve stem is released. It is a partial expanded sectional view of the butterfly valve in the 7th Embodiment of this invention, and shows the state which is restraining the valve stem with the restraining means. It is an enlarged view of the operating machine part of the conventional butterfly valve. It is an expanded sectional view of the manipulator part of the butterfly valve provided with the conventional temporary fixing member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
In the first embodiment, as shown in FIGS. 1 to 3, 1 is a butterfly valve (an example of a valve), and a disc-like valve body 3 is provided in a cylindrical valve box 2. 3 rotates together with the valve stem 4 around the axis of the valve stem 4 to open and close the flow path 5 in the valve box 2. Pipe lines 6 are connected to the inlet and outlet of the valve box 2, respectively.

  The valve rod 4 includes a first valve rod 8 on the driving side to which an opening / closing operating device 7 (an example of an opening / closing actuator) is connected, and a second valve on the non-driving side to which the opening / closing operating device 7 is not connected. Divided into two bars 9. The first and second valve rods 8 and 9 are each integrally attached to the valve body 3.

  The valve box 2 has a first boss portion 10 and a second boss portion 11. The first boss portion 10 is formed with a first rod hole 12 penetrating into and out of the valve box 2, and the second boss portion 11 is formed with a second rod hole 13 penetrating into and out of the valve box 2. Yes.

  One end of the valve stem 4, that is, the first valve rod 8 is rotatably inserted into the first rod hole 12, and the other end of the valve rod 4, that is, the second valve rod 9 is pivoted into the second rod hole 13. Has been inserted. In addition, an opening / closing operating device 7 that rotates the valve stem 4 about its axis is connected to one end of the valve stem 4, that is, the first valve stem 8. The opening / closing operation device 7 is detachably attached to the first boss portion 10 via bolts, nuts 14 and the like. The handle 15 is rotatable, and the first valve rod 8 is decelerated by rotating the handle 15. And a reduction gear 16 for transmitting to

  The outer peripheral surface of the first valve rod 8 and the inner peripheral surface of the first rod hole 12 are sealed with a seal member 17 such as an O-ring. The space between the outer peripheral surface of the second valve rod 9 and the inner peripheral surface of the second rod hole 13 is sealed with a seal member 29 such as an O-ring.

  A cover member 20 that closes the opening 13a of the second rod hole 13 from the outside is detachably attached to the second boss portion 11. The cover member 20 is a disk-shaped member, and is attached to the second boss portion 11 by a coupling tool 21 such as a plurality of bolts. For example, four of these couplers 21 are provided every 90 °.

  A seal groove 22 is formed on the entire circumference of the cover member 20, and an annular seal member 23 such as an O-ring is fitted in the seal groove 22. The joint portion between the second boss portion 11 and the cover member 20 is sealed by the seal member 23.

  As shown in FIGS. 1, 3 to 5, the other end of the valve stem 4, that is, the other end of the second valve stem 9, has a groove 25 (recessed and recessed) for restraining the valve stem 4 in the rotational direction. An example of the first restraining means is formed in a straight line over the diameter direction.

  During normal operation, as shown in FIGS. 1 and 2, by rotating the handle 15 of the opening / closing operating device 7, the speed reducer 16 decelerates the rotation of the handle 15 and transmits it to the first valve rod 8. The one valve stem 8, the second valve stem 9, and the valve body 3 rotate together around the axis of the valve stem 4, and the flow path 5 in the valve box 2 is opened and closed. As a result, the valve body 3 is switched to the fully closed position, the fully open position, or an arbitrary opening between the fully closed position and the fully open position, and in this state, the first valve rod 8 is rotated by the opening / closing operation device 7. Since it is restrained in the direction, it is possible to prevent the valve body 3 from being inadvertently rotated in the opening / closing direction.

  When performing maintenance (maintenance inspection) of the opening / closing operating unit 7, the cover member 20 is removed from the second boss portion 11 as shown by the phantom line in FIG. As shown, the temporarily fixing cover member 31 is attached to the second boss portion 11.

  Similar to the cover member 20, the temporary fixing cover member 31 is a disk-shaped member that closes the opening 13 a of the second rod hole 13 from the outside, and is detachably attached to the second boss portion 11 by the connector 21. Is attached. As shown in FIGS. 8 and 9, the temporary fixing cover member 31 is formed with a projecting piece portion 32 (an example of a convex portion and a second restraining means) for restraining the valve stem 4 in the rotational direction. Yes. The projecting piece 32 is freely detachable from the groove 25 of the second valve stem 9 in the axial direction of the valve stem 4. The groove portion 25 and the projecting piece portion 32 constitute a restraining means for restraining the valve rod 4 in the rotational direction.

  A sealing groove 22 is formed over the entire circumference of the temporary fixing cover member 31, and an annular sealing member 23 such as an O-ring is fitted in the sealing groove 22.

  Below, the procedure at the time of performing maintenance of the operating device for opening and closing 7 will be described.

  In a state where water has passed through the conduit 6, the handle 15 of the opening / closing operation device 7 is turned to bring the valve body 3 into the fully closed position, and as shown by the phantom line in FIG. Is removed from the second boss portion 11, and then the temporarily fixing cover member 31 is attached to the second boss portion 11 using the connector 21 as shown in FIGS. 6 and 7. At this time, by fitting the projecting piece 32 of the temporarily fixing cover member 31 into the groove 25 of the second valve stem 9, the valve stem 4 (first and second valve stems 8, 9) is restrained (groove). 25 and the projecting piece 32) are restrained in the rotation direction. Thereby, the valve stem 4 is temporarily (temporarily) fixed, and in this state, as shown in FIG. 6, the opening / closing operating device 7 is detached from the first boss portion 10 and detached from the first valve stem 8, Maintenance of the opening / closing operation device 7 can be performed. At this time, since the valve rod 4 is restrained in the rotation direction, the valve body 3 is not inadvertently rotated in the opening direction from the fully closed position, and generation of a water hammer or the like can be prevented.

  Moreover, since the groove part 25 is provided in the 2nd valve rod 9, and the protrusion part 32 is provided in the cover member 31 for temporary fixation among the groove part 25 and the protrusion piece part 32 which comprise a restriction means, restriction means Accordingly, it is not necessary to lengthen the valve stem 4, and the butterfly valve 1 can be reduced in size and weight.

  After the maintenance of the opening / closing operating unit 7 is performed, the opening / closing operating unit 7 is attached to the first boss portion 10 and connected to the first valve stem 8, whereby the valve stem 4 is rotated by the opening / closing operating unit 7. Restrained in direction.

  Thereafter, as shown by the phantom line in FIG. 6, the connecting tool 21 is removed and the temporarily fixing cover member 31 is removed from the second boss portion 11, and then the connecting tool 21 is used as shown by the solid line in FIG. 1. Then, the cover member 20 is attached to the second boss portion 11. As a result, the restraint of the valve stem 4 by the temporarily fixing cover member 31 is released. Therefore, by turning the handle 15 of the opening / closing operating unit 7, the valve stem 4 is rotated together with the valve body 3, and the valve body 3 The opening can be changed.

  In the first embodiment, when the maintenance of the opening / closing operating device 7 is performed, the valve body 3 is set to the fully closed position and the valve stem 4 is restrained. The rod 4 may be restrained. The direction of the groove 25 when the valve body 3 is set to the fully open position as described above is shifted by 90 ° in the rotational direction of the valve stem 4 as compared with the case where the valve body 3 is set to the fully closed position. Therefore, when the valve body 3 is restrained by setting the valve body 3 to the fully open position, the temporary fixing cover member 31 of the valve stem 4 is fixed compared to the case where the valve body 3 is restrained by setting the valve body 3 to the fully closed position. What is necessary is just to attach to the 2nd boss | hub part 11 in the state shifted by 90 degrees in the rotation direction. As a result, the protruding piece 32 of the temporarily fixing cover member 31 is fitted in the groove 25 in the same direction as the groove 25 of the second valve rod 9.

  In the first embodiment, the groove portion 25 is provided at the other end portion of the second valve stem 9 and the projecting piece portion 32 is provided at the temporary fixing cover member 31, but at the other end portion of the second valve stem 9. The protrusions 32 may be provided, and the grooves 25 may be provided in the temporary fixing cover member 31.

(Second Embodiment)
In the second embodiment, as shown in FIGS. 10 and 11, the other end of the second valve stem 9 has a plurality of holes 40 (recessed portions) for restraining the valve stem 4 in the rotational direction. And an example of the first restraining means). Four holes 40 are arranged, for example, every 90 ° in the rotation direction of the valve stem 4.

  As shown in FIGS. 12 and 13, the temporarily fixing cover member 31 has a plurality of pins 42 (an example of convex portions and second restraining means) for restraining the valve stem 4 in the rotational direction. Is formed. The four pins 42 are arranged, for example, every 90 ° in the rotation direction of the valve stem 4, and can be fitted into and removed from the hole 40 in the axial direction of the valve stem 4. The hole 40 and the pin 42 constitute a restraining means for restraining the valve stem 4 in the rotational direction.

  Below, the procedure at the time of performing maintenance of the operating device for opening and closing 7 will be described.

  With the valve body 3 in the fully closed position, the cover member 20 is removed from the second boss portion 11 as in the first embodiment (see the phantom line in FIG. 1), and then shown in FIGS. As described above, the temporarily fixing cover member 31 is attached to the second boss portion 11. At this time, each pin 42 of the temporarily fixing cover member 31 is fitted into each hole 40 of the second valve stem 9 so that the valve stem 4 (first and second valve stems 8 and 9) is restraining means ( The hole 40 and the pin 42) are restrained in the rotation direction. As a result, the valve stem 4 is temporarily fixed, and in this state, as shown in FIG. 14, the opening / closing operating device 7 is detached from the first boss portion 10 and detached from the first valve stem 8, thereby opening / closing the operating device 7. Maintenance can be performed.

  In the second embodiment, when the maintenance of the opening / closing operating unit 7 is performed, the valve body 3 is set to the fully closed position and the valve stem 4 is restrained. The rod 4 may be restrained.

  In the second embodiment, the hole 40 is provided in the other end portion of the second valve stem 9 and the pin 42 is provided in the temporary fixing cover member 31, but the pin is provided in the other end portion of the second valve stem 9. 42 may be provided, and the hole 40 may be provided in the temporarily fixing cover member 31.

(Third embodiment)
The third embodiment is a modification of the above-described first embodiment. As shown in FIGS. 16 and 17, the temporarily fixing cover member 48 has a protruding piece portion 32 fitted in the groove portion 25. It can be attached to the second boss portion 11 using the connector 21 in a reverse orientation of the constraining posture and the non-restraining posture in which the projecting piece portion 32 is separated from the groove portion 25.

  The seal grooves 22 are formed on both the front and back surfaces of the temporary fixing cover member 48, and the seal members 23 are fitted in the seal grooves 22, respectively.

  Hereinafter, the operation of the above configuration will be described.

  During normal operation, as shown in FIG. 17, the temporary fixing cover member 48 is attached to the second boss portion 11 in an unrestrained posture. As a result, since the protruding piece portion 32 faces outward and is separated from the groove portion 25, the valve stem 4 is not restrained in the rotating direction, and the first valve stem is turned by turning the handle 15 of the opening / closing operating device 7. 8, the second valve stem 9 and the valve body 3 rotate together around the axis of the valve stem 4, and the flow path 5 in the valve box 2 is opened and closed.

  When performing maintenance of the opening / closing operation device 7, with the valve body 3 in the fully closed position, the connector 21 is removed, the temporary fixing cover member 48 is removed from the second boss portion 11, and the front and back sides are reversed. After the orientation, as shown in FIG. 16, it is attached to the second boss portion 11 in a restrained posture. As a result, the projecting piece 32 fits into the groove 25 and the valve stem 4 is restrained in the rotational direction. With the valve rod 4 restrained in this manner, the opening / closing operating device 7 is removed from the first valve rod 8 and maintenance of the opening / closing operating device 7 is performed, and then the opening / closing operating device 7 is removed from the first valve rod 8. Provided. Thereby, the valve stem 4 is restrained in the turning direction by the opening / closing operation device 7.

  Thereafter, the connecting tool 21 is removed, and the temporarily fixing cover member 48 is removed from the second boss portion 11 and the front and back sides are reversed. Then, as shown in FIG. Install. As a result, the projecting piece portion 32 is separated from the groove portion 25 and the restraint of the valve stem 4 is released. Therefore, by turning the handle 15 of the opening / closing operating device 7, the valve stem 4 is rotated around the shaft center together with the valve body 3. By rotating, the opening degree of the valve body 3 can be changed.

  In the third embodiment, the restraining means having the projecting piece portion 32 and the groove portion 25 in the first embodiment described above is used, but the pin 42 in the second embodiment (see FIG. 15) A restraining means having a hole 40 may be used.

(Fourth embodiment)
In the fourth embodiment, as shown in FIGS. 18 and 19, the valve stem 4 is detachably attached to the valve stem body 27 integrally provided on the valve body 3 and the other end of the valve stem body 27. And an adjusting member 28 provided. The valve stem body 27 is divided into two parts, a first valve stem 8 and a second valve stem 9.

  A cylindrical first housing 18 is provided between the outer peripheral surface of the first valve rod 8 and the inner peripheral surface of the first rod hole 12. A seal member such as an O-ring is provided between the outer peripheral surface of the first valve rod 8 and the inner peripheral surface of the first housing 18 and between the outer peripheral surface of the first housing 18 and the inner peripheral surface of the first rod hole 12. Sealed (not shown).

  A cylindrical second housing 19 is provided between the outer peripheral surface of the second valve rod 9 and the inner peripheral surface of the second rod hole 13. The outer peripheral surface of the second valve rod 9 and the inner peripheral surface of the second housing 19 are sealed with a seal member (not shown) such as an O-ring, and the outer peripheral surface of the second housing 19 and the second rod hole 13 are sealed. Is sealed with a seal member 30 such as an O-ring.

  The adjusting member 28 adjusts the position of the valve stem body 27 in the axial direction A, and is rotatable integrally with the valve stem body 27. That is, the adjustment member 28 includes a circular adjustment plate 53 provided between the second valve stem 9 and the cover member 20, an adjustment bolt 54 and a nut 55 that connect the adjustment plate 53 to the second valve stem 9, have.

  As shown in FIGS. 20 and 21, the adjustment plate 53 is formed with a through hole 56 at the center, and a plurality of holes 57 around the through hole 56. The adjustment bolt 54 is inserted into the through hole 56 and screwed into the second valve stem 9. For example, eight hole portions 57 are arranged every 45 °.

  As shown in FIGS. 22 to 24, the other end of the valve stem 4, that is, the other end of the second valve stem 9, has a groove 25 (recess and first restraint for restraining the valve stem 4 in the rotational direction). An example of the means is formed in a straight line over the diameter direction. Further, a circular immersion portion 58 communicating with the groove portion 25 is formed at the radial center portion at the other end portion of the second valve stem 9.

  As shown in FIG. 19, the nut 55 is screwed into the adjusting bolt 54 and is housed in the recessed portion 58, and the adjusting plate 53 is sandwiched between the head of the adjusting bolt 54 and the nut 55. The other end of the second valve stem 9 is provided with a plurality of (two in FIG. 19 and FIG. 22) set screws 59 and protrudes, and these two set screws 59 are any two of the adjusting plates 53. Is inserted into the hole 57. As a result, the adjustment plate 53 is rotatable around the shaft center integrally with the second valve stem 9 via the set screw 59.

  As shown in FIGS. 19, 25, and 26, a cover member 20 that closes the opening 13 a of the second rod hole 13 from the outside is detachably attached to the second boss portion 11. The cover member 20 is a disk-shaped member, and is attached to the second boss portion 11 by a connecting tool 21 such as a plurality of bolts (four in FIG. 25).

A seal groove 22 is formed on the entire circumference of the cover member 20, and an annular seal member 23 such as an O-ring is fitted in the seal groove 22. The joint portion between the second boss portion 11 and the cover member 20 is sealed by the seal member 23. In addition, a circular immersing portion 24 is formed on the inner surface of the cover member 20, and the head of the adjustment bolt 54 is accommodated in the immersing portion 24.

  A thrust receiving member 60 made of an annular sheet is provided between the adjustment plate 53 and the cover member 20 and between the adjustment plate 53 and the second boss portion 11.

  During normal operation, as shown in FIG. 18, when the handle 15 of the opening / closing operating device 7 is turned, the speed reducer 16 decelerates the rotation of the handle 15 and transmits it to the first valve rod 8. 8, the second valve stem 9, the adjusting member 28 and the valve body 3 rotate together around the axis of the valve stem 4, and the flow path 5 in the valve box 2 is opened and closed.

  Further, as shown by the phantom line in FIG. 19, the connector 21 is removed, the cover member 20 is removed from the second boss portion 11, and the adjusting bolt 54 and the nut 55 are turned, whereby the valve stem body 27 is axially moved. The position of the valve stem body 27 can be adjusted in the axial direction A. For example, when the adjusting bolt 54 is turned in one direction and tightened to the second valve stem 9, the valve stem body 27 moves in a direction approaching the adjusting plate 53, and conversely, the adjusting bolt 54 is turned in the other direction. In this case, the valve stem body 27 moves away from the adjustment plate 53.

  Thereby, since the valve body 3 moves in the axial direction A together with the valve stem main body 27, the position of the valve body sheet with respect to the valve casing sheet can be adjusted in the axial direction A.

  Further, when performing maintenance of the opening / closing operation device 7, the cover member 20 is removed from the second boss portion 11, the adjustment member 28 is removed, and instead of the temporary fixing cover member 31 as shown in FIG. It is attached to the second boss part 11.

  As shown in FIGS. 27 to 29, the temporary fixing cover member 31 is a disk-like member that closes the opening 13 a of the second rod hole 13 from the outside, like the cover member 20, and is immersed in the inner surface. It has a portion 24 and is detachably attached to the second boss portion 11 by the connector 21. The temporary fixing cover member 31 is formed with a projecting piece portion 32 (an example of a convex portion and a second restraining means) for restraining the valve stem 4 in the rotational direction. The projecting piece 32 is freely detachable from the groove 25 of the second valve stem 9 in the axial direction A of the valve stem 4, and is divided into two in the radial direction at the immersion portion 24. The groove portion 25 and the projecting piece portion 32 constitute a restraining means for restraining the valve rod 4 in the rotational direction.

  A sealing groove 22 is formed over the entire circumference of the temporary fixing cover member 31, and an annular sealing member 23 such as an O-ring is fitted in the sealing groove 22.

  Below, the procedure at the time of performing maintenance of the operating device for opening and closing 7 will be described.

  As shown in FIG. 18, the handle 15 of the opening / closing operating device 7 is turned to bring the valve body 3 into the fully closed position, the coupling tool 21 is removed, and the cover member 20 is moved to the second position as shown in FIG. It removes from the boss | hub part 11, and while removing the adjustment bolt 54, the nut 55, and the adjustment board 53 from the 2nd valve rod 9, the thrust receiving member 60 is removed.

  Thereafter, the temporary fixing cover member 31 is attached to the second boss portion 11 as shown in FIG. At this time, the projecting portion 32 of the temporarily fixing cover member 31 is fitted into the groove portion 25 (see FIG. 22) of the second valve rod 9 to thereby provide the valve stem 4 (first and second valve stems 8 and 9). Is restrained in the rotation direction by the restraining means (the groove portion 25 and the projecting piece portion 32). As a result, the valve stem 4 is temporarily (temporarily) fixed. In this state, the opening / closing operating device 7 is detached from the first boss portion 10 and detached from the first valve stem 8 to maintain the opening / closing operating device 7. It can be performed. At this time, as shown in FIG. 27, since the valve rod 4 is restrained in the rotation direction, the valve body 3 does not inadvertently rotate in the opening direction from the fully closed position, and a water hammer or the like is generated. Can be prevented.

  Moreover, since the groove part 25 is provided in the 2nd valve rod 9, and the protrusion part 32 is provided in the cover member 31 for temporary fixation among the groove part 25 and the protrusion piece part 32 which comprise a restriction means, restriction means Accordingly, it is not necessary to lengthen the valve stem 4, and the butterfly valve 1 can be reduced in size and weight.

  After the maintenance of the opening / closing operating unit 7 is performed, the opening / closing operating unit 7 is attached to the first boss portion 10 and connected to the first valve stem 8, whereby the valve stem 4 is rotated by the opening / closing operating unit 7. Restrained in direction.

  Thereafter, the connector 21 is removed, the temporary fixing cover member 31 is removed from the second boss portion 11, and then the adjusting bolt 54, the nut 55 and the adjusting plate 53 are connected to the second valve rod 9 as shown in FIG. At the same time, the thrust receiving member 60 is attached, and the cover member 20 is attached to the second boss portion 11 using the connector 21. As a result, the restraint of the valve stem 4 by the temporarily fixing cover member 31 is released. Therefore, the valve stem 4 is rotated together with the valve body 3 by turning the handle 15 of the opening / closing operating device 7 as shown in FIG. The opening degree of the valve body 3 can be changed.

  In the fourth embodiment, when the maintenance of the opening / closing operating device 7 is performed, the valve body 3 is set to the fully closed position and the valve stem 4 is restrained. The rod 4 may be restrained.

(Fifth embodiment)
The fifth embodiment is a modification of the fourth embodiment. As shown in FIGS. 20 and 21, the adjustment plate 53 has a through hole 56 and a plurality of holes (eight in FIG. 20). The hole 57 is an example of a recess and a first restraining means for restraining the valve stem 4 in the rotation direction.

  As shown in FIGS. 30 to 32, the temporary fixing cover member 31 is formed with a plurality of pins 62 (an example of a convex portion and a second restraining means) for restraining the valve stem 4 in the rotational direction. ing. Four of these pins 62 are arranged at intervals of 90 °, and can be freely fitted into and removed from the holes 57 of the adjustment plate 53 in the axial direction A of the valve stem 4. As shown in FIG. 20, the number of holes 57 is larger than the number of set screws 59 provided in the second valve stem 9 (two in FIGS. 19 and 22), and the number of pins 62. (4 in FIG. 30) or more.

  The hole 57 and the pin 62 constitute a restraining means for restraining the valve stem 4 in the rotation direction.

  Below, the procedure at the time of performing maintenance of the operating device for opening and closing 7 will be described.

  In a state where water has passed through the pipe 6, the handle 15 of the opening / closing operating device 7 is turned to bring the valve body 3 into the fully closed position, and the connector 21 is removed as shown by the phantom line in FIG. Is removed from the second boss portion 11.

  Thereafter, as shown in FIG. 32, the temporarily fixing cover member 31 is attached to the second boss portion 11 using the connector 21 while the adjustment member 28 is still attached to the second valve stem 9. At this time, as shown in an imaginary line of FIG. 20 and FIG. 32, the pin 62 of the temporarily fixing cover member 31 is inserted into the hole portion in which the set screw 59 is not inserted among the plurality of hole portions 57 of the adjustment plate 53. By fitting into 57, the adjustment plate 53 is restrained in the rotational direction by restraining means (hole 57 and pin 62).

  At this time, as indicated by phantom lines in FIGS. 19 and 20, the set screw 59 of the second valve stem 9 is inserted into the hole 57 of the adjustment plate 53, so that the valve stem body 27 (first valve stem 8 And the second valve rod 9) are restrained in the rotational direction by the restraining means (the hole 57 and the pin 62 shown in FIG. 32) via the adjusting plate 53. As a result, the valve stem 4 is temporarily fixed, and in this state, the opening / closing operating device 7 can be detached from the first boss portion 10 and detached from the first valve rod 8 to perform maintenance of the opening / closing operating device 7. .

  Further, as shown in FIG. 32, among the hole 57 and the pin 62 constituting the restraining means, the hole 57 is provided in the adjustment plate 53 and the pin 62 is provided in the temporary fixing cover member 31. It is not necessary to lengthen the valve stem 4 according to the restraining means, and the butterfly valve 1 can be reduced in size and weight.

  After the maintenance of the opening / closing operating unit 7 is performed, the opening / closing operating unit 7 is attached to the first boss portion 10 and connected to the first valve stem 8, whereby the valve stem 4 is rotated by the opening / closing operating unit 7. Restrained in direction.

  Thereafter, as shown by the phantom line in FIG. 32, the connector 21 is removed, the temporary fixing cover member 31 is removed from the second boss portion 11, and then the connector 21 is removed as shown in FIGS. Using, the cover member 20 is attached to the second boss portion 11. As a result, the restraint of the valve stem 4 by the temporarily fixing cover member 31 is released. Therefore, by turning the handle 15 of the opening / closing operating unit 7, the valve stem 4 is rotated together with the valve body 3, and the valve body 3 The opening can be changed.

  Further, in the fifth embodiment, when maintenance of the opening / closing operation device 7 is performed, it is not necessary to attach / detach the adjusting member 28 to / from the second valve stem 9, and the adjusting member 28 is attached to the second valve stem 9. Since the maintenance of the opening / closing controller 7 can be performed in the state as it is, the maintenance work can be performed quickly and easily.

  In the fifth embodiment, when the maintenance of the opening / closing operating unit 7 is performed, the valve body 3 is set to the fully closed position and the valve stem 4 is restrained. The rod 4 may be restrained.

(Sixth embodiment)
In the sixth embodiment, the valve stem 4 is temporarily fixed using a gear type restraining means.

  That is, as in the first embodiment, as shown in FIGS. 4 and 5, the groove 25 is formed in a straight line in the diameter direction at the other end of the second valve stem 9. As shown in FIGS. 33 to 37, the restraining means has an external gear 71 and an internal gear 72.

  As shown in FIGS. 33 to 35, the external gear 71 is a disk-shaped member having a plurality of teeth on the outer periphery, and is detachably attached to the other end portion of the second valve rod 9. The external gear 71 is provided with a projecting piece 73. The projecting piece 73 is detachable from the groove 25 of the second valve stem 9 in the axial direction A of the valve stem 4.

  As shown in FIGS. 33, 36, and 37, the internal gear 72 is an annular member having a plurality of teeth on the inner periphery, and is provided on the temporary fixing cover member 31. The temporarily fixing cover member 31 is a disk-shaped member that closes the opening 13a of the second rod hole 13 from the outside, and is detachably attached to the second boss portion 11 by a plurality of connecting members 21 such as bolts. ing. The temporary fixing cover member 31 is formed with a seal groove 22 over the entire circumference, and an annular seal member 23 such as an O-ring is fitted in the seal groove 22.

  Hereinafter, the operation of the above configuration will be described.

  During normal operation, as shown in FIG. 38, the external gear 71 is removed from the other end of the second valve rod 9, and the temporarily fixing cover member 31 is attached to the second boss portion 11. Then, by turning the handle 15 of the opening / closing operating device 7, the first valve stem 8, the second valve stem 9 and the valve body 3 are integrally rotated around the axis of the valve stem 4, so that the inside of the valve box 2 The flow path 5 is opened and closed. As a result, the valve body 3 is switched to the fully closed position, the fully open position, or an arbitrary opening between the fully closed position and the fully open position, and in this state, the first valve rod 8 is rotated by the opening / closing operation device 7. Since it is restrained in the direction, it is possible to prevent the valve body 3 from being inadvertently rotated in the opening / closing direction.

  Below, the procedure at the time of performing maintenance of the operating device for opening and closing 7 will be described.

  In a state where water has passed through the pipe 6, the handle 15 of the opening / closing operating device 7 is turned to bring the valve body 3 into the fully closed position, and as shown by the phantom line in FIG. The cover member 31 is once removed from the second boss portion 11.

  Thereafter, as shown in FIG. 33, the protruding piece 73 of the external gear 71 is fitted into the groove 25 of the second valve stem 9, and the external gear 71 is attached to the other end of the second valve stem 9. Thereafter, the temporarily fixing cover member 31 is attached to the second boss portion 11 using the connector 21.

  As a result, the external gear 71 and the internal gear 72 mesh with each other, and the valve stem 4 (first and second valve stems 8 and 9) is restrained in the rotational direction by the restraining means (the external gear 71 and the internal gear 72). Therefore, the valve stem 4 is temporarily (temporarily) fixed. In this state, the opening / closing operating device 7 is detached from the first boss portion 10 and detached from the first valve stem 8, so that the opening / closing operating device 7 Maintenance can be performed. At this time, since the valve rod 4 is restrained in the rotation direction, the valve body 3 is not inadvertently rotated in the opening direction from the fully closed position, and generation of a water hammer or the like can be prevented.

  Of the external gear 71 and the internal gear 72 constituting the restraining means, the external gear 71 is detachably provided on the second valve rod 9, and the internal gear 72 is provided on the temporary fixing cover member 31. It is not necessary to lengthen the valve stem 4 according to the restraining means, and the butterfly valve 1 can be reduced in size and weight.

  In addition, since the valve rod 4 is restrained by using the external gear 71 and the internal gear 72 as described above, the valve body 3 is not only in the fully closed position, but also in the fully open position or the fully closed position and the fully open position. It can be temporarily fixed at any opening between.

  In order to perform normal operation after maintenance of the opening / closing operating unit 7 as described above, the opening / closing operating unit 7 is attached to the first boss portion 10 and connected to the first valve stem 8, The valve stem 4 is restrained in the turning direction by the opening / closing operating device 7.

  Thereafter, as shown by the phantom line in FIG. 33, the connector 21 is removed, the temporarily fixing cover member 31 is removed from the second boss portion 11, and the external gear 71 is removed from the other end portion of the second valve rod 9. . Thereafter, as shown in FIG. 38, the temporarily fixing cover member 31 is attached to the second boss portion 11 using the connector 21 with the external gear 71 removed. As a result, the restraint of the valve stem 4 by the restraining means is released, so that the valve stem 4 is rotated together with the valve body 3 by turning the handle 15 of the opening / closing operating device 7 and the opening degree of the valve body 3 is changed. be able to.

  In the sixth embodiment, as shown by the solid line in FIG. 38, the temporary fixing cover member 31 is attached to the second boss portion 11 during normal operation. Instead, the cover member 20 shown in FIG. 3 in the first embodiment may be attached to the second boss portion 11.

  In the sixth embodiment, as shown in FIG. 33, the external gear 71 is detachably attached to the other end of the second valve rod 9, and the internal gear 72 is provided on the temporary fixing cover member 31. However, the internal gear 72 may be detachably attached to the other end of the second valve rod 9 and the external gear 71 may be provided on the temporary fixing cover member 31.

(Seventh embodiment)
In each of the above embodiments, the restraining means is provided on the other end of the valve stem 4 and the temporarily fixing cover members 31, 48. However, in the seventh embodiment described below, as shown in FIG. The restraint means is provided at the other end of the valve stem 4 and the second boss portion 11 of the valve box 2 (an example of a portion facing the other end of the valve stem 4 of the valve box 2).

  In other words, the restraining means includes a temporary fixing bolt 76 (an example of a convex portion) and a temporary fixing hole 77 (an example of a concave portion). Among these, the temporary fixing hole 77 is formed on the other end of the valve stem 4, that is, on the outer peripheral surface of the second valve stem 9. A screw hole 78 is formed in the second boss portion 11, and a temporary fixing bolt 76 is detachably provided in the second boss portion 11 by being screwed into the screw hole 78. The tip end portion of the temporary fixing bolt 76 and the temporary fixing hole portion 77 are freely detachable in the radial direction of the valve stem 4.

  A cover member 20 that closes the opening 13 a of the second rod hole 13 is attached to the second boss portion 11.

  Hereinafter, the operation of the above configuration will be described.

  During normal operation, as shown by the phantom line in FIG. 39, the first valve is removed by turning the handle 15 of the opening / closing operating device 7 by removing the temporary fixing bolt 76 from the second boss portion 11. The rod 8, the second valve rod 9 and the valve body 3 are integrally rotated around the axis of the valve rod 4, and the flow path 5 in the valve box 2 is opened and closed.

  Further, when performing maintenance (maintenance inspection) of the opening / closing operating unit 7, the handle 15 of the opening / closing operating unit 7 is turned to bring the valve body 3 into a fully closed position, for example, as shown by the solid line in FIG. The bolt 76 is attached to the second boss portion 11, and the tip end portion of the temporary fixing bolt 76 is fitted into the temporary fixing hole 77. As a result, the valve stem 4 (first and second valve stems 8 and 9) is restrained in the rotational direction by the restraining means (temporary fixing bolt 76 and temporary fixing hole 77). In this state, the opening / closing operation is performed. The machine 7 can be removed from the first boss portion 10 and detached from the first valve stem 8 to perform maintenance of the opening / closing operation machine 7.

  Of the temporary fixing bolt 76 and the temporary fixing hole 77 constituting the restraining means, the temporary fixing bolt 76 is detachably provided on the second boss portion 11, and the temporary fixing hole 77 is the second. Since it is provided on the outer peripheral surface of the valve stem 9, it is not necessary to lengthen the valve stem 4 in accordance with the restraining means, whereby the butterfly valve 1 can be reduced in size and weight.

  After the maintenance of the opening / closing operating unit 7 is performed, the opening / closing operating unit 7 is attached to the first boss portion 10 and connected to the first valve stem 8, whereby the valve stem 4 is rotated by the opening / closing operating unit 7. Restrained in direction. Thereafter, the temporary fixing bolt 76 is removed from the second boss portion 11 as indicated by a virtual line in FIG.

  In the seventh embodiment, when performing maintenance of the opening / closing operation device 7, the position of the temporary fixing hole 77 of the second valve rod 9 and the second boss when the valve body 3 is set to the fully closed position. The position of the temporary fixing hole 77 of the second valve stem 9 is fixed when the valve stem 4 is temporarily fixed by matching the position of the screw hole 78 of the portion 11. And the position of the screw hole 78 of the second boss portion 11 may match, and the valve stem 4 may be temporarily fixed.

  In the seventh embodiment, the concave portion is provided in the second valve stem 9 and the convex portion is provided in the second boss portion 11. However, the concave portion is provided in the second boss portion 11 and the convex portion is provided in the second valve stem 9. May be provided.

  In each of the above-described embodiments, the manual rotation type opening / closing operation device 7 having the handle 15 and the speed reducer 16 has been described as an example of the opening / closing operation device, but an electric rotation type device having a motor or the like is used. Also good.

  In each of the above-described embodiments, the valve rod 4 having the divided structure divided into the first valve rod 8 and the second valve rod 9 has been described. However, the first valve rod 8 and the second valve rod 9 are joined together. It may be a valve stem of this structure.

  In each said embodiment, although the butterfly valve 1 was mentioned as an example of a valve, it is not limited to the butterfly valve 1, For example, it can apply also to a ball valve etc.

1 Butterfly valve (valve)
2 Valve box 3 Valve body 4 Valve rod 5 Flow path 7 Opening / closing operation machine (opening / closing actuator)
13 Second rod hole 13a Second rod hole opening 25 Groove (recess, first restraining means)
27 Valve stem body 28 Adjustment member 31 Temporary fixing cover member 32 Projection piece (convex portion, second restraining means)
40 hole (recess, first restraining means)
42 pins (convex, second restraining means)
48 Temporary fixing cover member 57 Hole (recess, first restraining means)
62 pin (convex, second restraining means)
71 External gear 72 Internal gear 76 Temporary fixing bolt (convex part)
77 Temporary fixing hole (concave)
A Axial direction

Claims (10)

The valve body rotates integrally with the valve stem to open and close the flow path in the valve box,
At one end of the valve stem, an opening / closing actuator for rotating the valve stem is provided detachably,
The other end of the valve stem is a temporary fixing structure that temporarily fixes the valve stem of the valve that is rotatably inserted into a rod hole formed in the valve box,
A temporary fixing structure for a valve stem, characterized in that a restraining means for restraining the valve stem in the rotational direction is provided at the other end of the valve stem and the portion facing the other end of the valve stem of the valve box. . The restraining means has a convex part and a concave part,
Either one of the convex part and the concave part is provided at the other end of the valve stem, and the other is provided detachably on the valve box,
The temporary fixing structure for a valve stem according to claim 1, wherein the convex portion and the concave portion are detachable. The restraining means is provided on a temporary fixing cover member that is detachably attached to the valve box and closes the opening of the rod hole from the outside, and the other end of the valve rod. Temporary fixing structure of the described valve stem. The restraining means has a convex part and a concave part,
Either one of the convex part and the concave part is provided on the other end of the valve stem, and the other is provided on the temporary fixing cover member,
4. The temporary fixing structure of the valve stem according to claim 3, wherein the convex portion and the concave portion are detachable in the axial direction of the valve stem. The valve stem has a valve stem body provided on the valve body, and an adjustment member provided on the other end of the valve stem body,
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
A recess is provided in the adjustment member;
The temporary fixing structure for a valve stem according to claim 4, wherein the convex portion is provided on the temporary fixing cover member. The valve stem has a valve stem body provided on the valve body, and an adjustment member provided detachably on the other end of the valve stem body,
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
A recess is provided at the other end of the valve stem body,
The temporary fixing structure for a valve stem according to claim 4, wherein the convex portion is provided on the temporary fixing cover member. The temporarily fixing cover member can be attached to the valve box in a reverse orientation of a restraining posture in which the convex portion and the concave portion are fitted and an unconstrained posture in which the convex portion and the concave portion are separated from each other. The valve shaft temporary fixing structure according to any one of claims 4 to 6. The restraining means has an external gear and an internal gear,
The external gear and the internal gear mesh with each other in the rotation direction of the valve stem,
4. The valve according to claim 3, wherein one of the external gear and the internal gear is provided at the other end portion of the valve rod, and the other gear is provided at the temporary fixing cover member. Temporary fixing structure of the rod. The valve body rotates integrally with the valve stem to open and close the flow path in the valve box,
At one end of the valve stem, an opening / closing actuator for rotating the valve stem is provided detachably,
The other end of the valve stem is rotatably inserted into a rod hole formed in the valve box,
A valve characterized in that a first restraining means for restraining the valve stem in the rotational direction is provided at the other end of the valve stem. A temporary fixing cover member that is detachably attached to the valve box of the valve described in claim 9 and closes the opening of the rod hole from the outside,
A second restraining means for restraining the valve stem in the rotation direction;
The temporary fixing cover member, wherein the second restraining means is freely detachable from the first restraining means in the axial direction of the valve stem.

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