JP2020148234A - Method for attaching valve drive device and mechanism for supporting valve drive device - Google Patents

Abstract

To provide a method for attaching a valve drive device onto pipe equipment in a state of suppressing the displacement of the position relative to the valve stem in place of a manual handle that is connected to the valve stem, and to provide a mechanism for supporting a valve drive device in a state of suppressing the displacement of the position relative to the valve stem.SOLUTION: There is provided a valve drive device attaching method for attaching a valve drive device 10 with a motor 13 onto pipe equipment 11 in place of a manual handle that is supported by a support member 12 having a flange part B fixed to the flange part A of the pipe equipment 11 from one side and attached to the pipe equipment 11, which includes a fist step of detaching the manual handle from the support member 12 and the valve stem 21 to which the manual handle is connected, a second step of fixing a support mechanism 30 to the flange parts A, B, and a third step of connecting the valve drive device 10 to the valve stem 21 and fixing the valve drive device 10 onto the support mechanism 30.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method of attaching a valve drive device having a motor to the pipe equipment instead of a manual handle attached to the pipe equipment, and a support mechanism for supporting the valve drive device.

The manual valve that regulates the flow of fluid in the pipe equipment has a manual handle that applies force to the valve rod to translate or rotate the valve rod together with the valve body, and is supported by a support member fixed to the pipe equipment. (See Patent Document 1). In the manual valve in which the valve stem is arranged vertically, the support member supports the manual handle from below, and in the manual valve in which the valve stem is arranged horizontally, the support member arranged at the same height as the manual handle is manually operated. Support the handle. Regardless of the orientation of the valve stem, the support member has a flange portion (hereinafter referred to as "handle side flange portion"), and the handle side flange portion is fixed to the pipe side flange portion provided in the pipe equipment.

By the way, in the manual valve, a person turns the manual handle to generate a rotational force. On the other hand, the electric valve can generate a rotational force by driving the motor, and if it is connected to a network, the motor can be controlled remotely. Therefore, there is a considerable demand to replace the manual valve with an electric valve, but it costs a lot of money to replace the entire manual valve including the valve body and the valve stem with an electric valve, and the operation of the pipe equipment is stopped. It is not easy because it is necessary to drain the fluid.

Japanese Unexamined Patent Publication No. 2011-231804

Therefore, a proposal is to remove the manual handle from the valve stem and connect a valve drive device having a motor to the valve stem. The valve drive device is heavier than the manual handle, and the support member that supported the manual handle does not sufficiently support the valve drive device. Therefore, a member independent of the pipe equipment (a member that is not fixed to the pipe equipment) is newly provided. It is conceivable to support the valve drive device.

However, when the valve drive device is supported by a member independent of the pipe equipment, there arises a problem that the relative position of the valve drive device with respect to the valve stem changes due to contraction or expansion of the pipe equipment due to changes in the fluid temperature and the outside air temperature.
The present invention has been made in view of such circumstances, and instead of the manual handle connected to the valve stem, the valve drive device is attached to the pipe equipment in a state where the displacement of the relative position with respect to the valve stem is suppressed. It is an object of the present invention to provide a support mechanism capable of supporting a valve drive device while suppressing a displacement of a relative position with respect to a valve stem.

The method of attaching the valve drive device according to the first aspect of the present invention is supported by a support member having a flange portion B fixed to the flange portion A of the pipe equipment from one side and attached to the pipe equipment. A method of attaching a valve drive device including a motor to the pipe equipment instead of the manual handle, the first step of removing the manual handle from the valve rod to which the support member and the manual handle are connected. It has a second step of fixing the support mechanism to the flange portions A and B, and a third step of connecting the valve drive device to the valve rod and fixing the valve drive device to the support mechanism.

The support mechanism according to the second invention for the above purpose is from one side to the flange portion A by means of the flange portion A of the pipe equipment and the bolt F whose tip portion is fitted into the screw hole formed in the flange portion A. A support mechanism that is fixed to a fixed flange portion B and supports a valve drive device including a motor. A base member that is in close contact with the flange portion B from one side and a tip that is attached to the base member and has a tip. The portion is provided with a bolt G whose portion is in close contact with the tip end portion of the bolt F from the other side in the screw hole.

The method of attaching the valve drive device according to the first invention is the second step of fixing the support mechanism to the flange portions A and B, connecting the valve drive device to the valve rod, and fixing the valve drive device to the support mechanism. Since it has the third step, the valve drive device is supported by the support mechanism fixed to the flange portions A and B, and the displacement of the relative position with respect to the valve rod is suppressed.
Further, the support mechanism according to the second invention is fixed to the flange portion A from one side by the flange portion A of the pipe equipment and the bolt F whose tip portion is fitted into the screw hole formed in the flange portion A. A mechanism fixed to the flange portion B, the base member which is in close contact with the flange portion B from one side, and the tip of the bolt F in a screw hole which is attached to the base member and whose tip portion is formed in the flange portion A. Since the portion is provided with a bolt G that comes into close contact with the other side, the support mechanism stabilizes the valve drive device in a state of being attached to the flange portions A and B in a state where the displacement of the relative position with respect to the valve rod is suppressed. Can be supported.

It is explanatory drawing which shows the state which attached the valve drive device by the attachment method of the valve drive device which concerns on one Embodiment of this invention. It is explanatory drawing of the flange part A, B. It is explanatory drawing which shows the state which attached the base member to the flange part A, B. FIG. 1 is a partially omitted PP arrow view of FIG. It is explanatory drawing which shows the state which attached the base member to the flange part A, B. It is explanatory drawing which shows the state which attached the base member to the flange part A, B.

Subsequently, an embodiment embodying the present invention will be described with reference to the attached drawings, and the present invention will be understood.
As shown in FIGS. 1, 2, and 4, the method of attaching the valve drive device according to the embodiment of the present invention is a support having a flange portion B fixed to the flange portion A of the pipe equipment 11 from one side. This is a method in which a valve drive device 10 including a motor 13 is attached to the pipe equipment 11 in place of a manual handle (not shown) supported by the member 12 and attached to the pipe equipment 11. The details will be described below.

In the present embodiment, as shown in FIG. 1, the pipe equipment 11 has a vertically long vertical pipe 14 and a flange portion A formed at one end (right end in the present embodiment) and the other end (the other end (in the present embodiment)). In the present embodiment, the left end portion) has a horizontal projecting body 15 connected to the vertical pipe 14. As shown in FIGS. 2 and 3, the flange portion A has an annular maximum diameter region 16a arranged to face the annular flange portion B on one side, and is integrally integrated with the maximum diameter region 16a on the other side. It is provided with an enlarged diameter region 16. The diameter-expanded region 16 expands toward the maximum diameter region 16a (that is, the flange portion B). A plurality of screw holes 18 that horizontally penetrate the diameter-expanded region 16 and the maximum diameter region 16a are formed in the flange portion A, respectively, and the diameter-expanded region 16 is provided with an opening 17 of the screw holes 18.

In the flange portion B having the same diameter as the maximum diameter region 16a, a plurality of through holes (stupid holes) 19 that horizontally penetrate the flange portion B are formed at positions corresponding to (opposing) each screw hole 18. .. Through each through hole 19, a through hole 19 is inserted, and a bolt F in which a tip end portion (the other end portion) is fitted in the screw hole 18 is attached (that is, each bolt F inserts a flange portion B through the flange portion B). ing). In the present embodiment, the bolt F is a stud bolt, and the nut 20 is fitted to a base end portion (one end portion) protruding from the flange portion B to one side (right side). The flange portions A and B are fixed by a plurality of pairs of bolts F and nuts 20. In addition, although the screw hole 18 and the through hole 19 to which the bolt F is not attached are described in FIGS. 1, 2, and 3, in the present embodiment, all the screw holes 18 and the through hole 19 are covered. Bolt F is attached.

As shown in FIG. 1, the support member 12 is long in the horizontal direction, the base end portion (the other end portion) is connected to the flange portion B, and the valve rod 21 can move the valve rod 21 arranged horizontally in the axial direction. I support it in a good condition. The valve rod 21 penetrates the support member 12 and the flange portions A and B, a male screw portion is provided in a region protruding to one side from the support member 12, and the valve drive device 10 is connected to the male screw portion. Before the valve drive device 10 is connected, a manual handle (not shown) is connected. A valve body (not shown) is connected to a portion of the valve stem 21 protruding from the flange portions A and B to the other side.

The valve stem 21 is valved when the manual handle is rotated by a person in a state where the manual handle is connected to the valve rod 21 (a state in which the female screw portion of the manual handle is engaged with the male screw portion of the valve rod 21). It moves in the axial direction of the valve stem 21 together with the body (horizontal movement in the present embodiment). The valve body moves horizontally from the closed flow path of the vertical pipe 14 to one side to open the flow path of the vertical pipe 14, and from the open flow path of the vertical pipe 14 to the other. By moving horizontally to the side, the flow path of the vertical pipe 14 is closed.

The valve drive device 10 connected to the valve rod 21 from which the manual handle has been removed includes a tubular stem 22 mounted on the valve rod 21, a motor 13, an operation handle 23, or any of the motor 13 and the operation handle 23. It is provided with a power transmission mechanism 24 that transmits one of the rotational forces to the stem 22, and a switching lever 25 that switches which of the motor 13 and the operation handle 23 is to be applied to the stem 22.

The stem 22 is formed with a female screw portion that meshes with the male screw portion of the valve stem 21. The power transmission mechanism 24 includes a tubular member 26 connected to the stem 22, a worm wheel 27 attached to the tubular member 26, a worm 28 meshed with the worm wheel 27, and the like. The stem 22 is rotatably held by the holding body 29 in a state of being housed inside a tubular holding body 29 composed of a plurality of members. The stem 22 and the tubular member 26 are designed to mesh with each other.

The valve drive device 10 in which the female screw portion of the stem 22 meshes with the male screw portion of the valve rod 21 applies a rotational force from the motor 13 or the operation handle 23 to the stem 22 via the power transmission mechanism 24 to rotate the stem 22. , The valve stem 21 is horizontally moved together with the valve body.
The support mechanism 30 according to the embodiment of the present invention that supports the valve drive device 10 is in close contact with the flange portion B from one side as shown in FIGS. 1, 3, 4, 5, and 6. Three base members 31, bolts G attached to each base member 31 (hexagonal bolts in this embodiment), annular spacers 32 are fixed to one end, and a plurality of other ends are attached to the base member 31. It is provided with a bracket 34 fixed by a hexagon bolt 33 of the above. In addition, in FIGS. 4 and 5, the description of the portion other than the flange portion B of the support member 12 is omitted.

One end of each base member 31 projecting toward the inside of the flange portion B with the central region covering a part of the flange portion A and a part of the flange portion B from the outer peripheral side of the flange portions A and B. The portion comes into contact with the flange portion B from one side, and the other end portion protruding toward the inside of the flange portion A is arranged at a position having a distance to the enlarged diameter region 16 on the other side of the flange portion A. As shown in FIGS. 3 and 5, each base member 31 is formed with a plurality of screw holes 35 to which the hexagon bolt 33 is attached at one end, and the male screw portion of the bolt G is meshed with the other end. A plurality of screw holes 36 (see FIG. 3) to be attached are formed.

As shown in FIGS. 3 and 5, each base member 31 comes into close contact with the flange portion B at different positions in the circumferential direction of the flange portion B. In the present embodiment, the three base members 31 are in close contact with the flange portion B in a state of being arranged at equal intervals in the circumferential direction of the flange portion B.
At one end of each base member 31, a region where the base end of the bolt F and the nut 20 are arranged is cut out.

As shown in FIG. 3, the bolt G has a front side (one side) protruding from the screw hole 36 to one side and a tip portion (one end) fitted into the screw hole 18 in a state of being attached to the screw hole 36. It is brought into close contact with the tip of the bolt F from the other side (left side). A nut 37 for preventing loosening of the bolt G is attached to the base side of the bolt G attached to the screw hole 36 so as to project from the screw hole 36 to the other side. As a result, the support mechanism 30 is fixed to the flange portion A and the flange portion B fixed to the flange portion A from one side by the bolt F whose tip portion is fitted into the screw hole 18 formed in the flange portion A. The valve drive device 10 will be supported. In the present embodiment, the bolt G is housed in the screw hole 18 in a state where the bolt G is not meshed with the screw hole 18.

As shown in FIGS. 1 and 4, the bracket 34 includes a ring member 38 fixed to the three base members 31 by the hexagon bolt 33, and a plurality of brackets 34 having the other end connected to the ring member 38 (this embodiment). In this form, it has three) long members 39 and an annular member 40 to which one ends of a plurality of long members 39 are connected. Each long member 39 has a U-shaped cross section and is horizontally arranged so that the groove side cannot be seen in a plan view, and rainwater or the like is prevented from accumulating on the groove side (inside).

As shown in FIG. 1, a spacer 32 is fixed to the annular member 40.
With the bracket 34 fixed to the three base members 31, as shown in FIGS. 1 and 3, the annular member 38 is penetrated by the support member 12, and the annular member 40 and the spacer 32 fixed to the annular member 40. Is penetrated by a region protruding unilaterally from the support member 12 of the valve stem 21.

Next, a method of attaching the valve drive device 10 for attaching the valve drive device 10 to the pipe equipment 11 instead of the manual handle will be described.
The valve drive device 10 is attached to the valve rod 21 by the first step of removing the manual handle from the support member 12 and the valve stem 21, the second step of fixing the support mechanism 30 to the flanges A and B, and the valve drive device 21. It has a third step of connecting the 10s and fixing the valve drive device 10 to the support mechanism 30.

In the second step (see FIGS. 1, 3, 4, 5, and 6), one end of each of the three base members 31 is brought into close contact with each other at different positions of the flange portion B, and the bolt G to which the nut 37 is attached is attached. Is attached to the screw hole 36 of the base member 31, and the tip of the bolt G is brought into close contact with the tip of the bolt F in the screw hole 18. After that, the hexagonal bolt 33 through which the annular member 38 is inserted is attached to the three base members 31, and the bracket 34 is fixed to the three base members 31. The spacer 32 may be attached to the annular member 40 before or after the bracket 34 is fixed to the three base members 31.

In the third step (see FIG. 1), first, the female screw portion of the stem 22 held by the holding body 29 is engaged with the male screw portion of the valve stem 21, and the stem 22 is attached to the valve stem 21. The holding body 29 is fixed to the spacer 32 by the bolt 41. Then, the tubular member 26 is brought into the state of being meshed with the stem 22, and the parts other than the stem 22 and the holding body 29 of the valve driving device 10 are connected to the holding body 29 by the bolt 42.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions that do not deviate from the gist are within the scope of the present invention.
For example, the flange portions A and B to which the support mechanism is fixed may be in close contact with each other, or may have a seal member or the like sandwiched between the flange portions A and B (non-contact state). .. Further, the flange portion A does not have to have an enlarged diameter region. When the flange portion A does not have an enlarged diameter region, the flange portions A and B are fixed by a bolt penetrating the flange portions A and B and a nut mounted on the bolt in close contact with the flange portion A. Good.

The flange portion A may be provided on a projecting body that is connected to a horizontally arranged pipe and projects vertically (upwardly). In this case, the support mechanism is fixed to the flange portions A and B. Support the valve drive from below.
Further, the base member may be fixed to the flange portions A and B with the other end portion in close contact with the flange portion A from the other side. The number of base members may be two or four or more.

The application of the present invention is not limited to the type of valve (for example, a sluice valve) in which the valve body and the valve stem are translated. For example, the present invention is also applicable to a type of valve (for example, a butterfly valve, a ball valve, a three-way valve) in which the valve body and the valve stem rotate to open and close the flow path, and the valve body rotates and moves. When applying the present invention to a valve, a stem that is key-connected to the valve stem may be adopted.

10: Valve drive device, 11: Pipe equipment, 12: Support member, 13: Motor, 14: Vertical pipe, 15: Horizontal protrusion, 16: Widened area, 16a: Maximum diameter area, 17: Opening, 18: Screw Hole, 19: Through hole, 20: Nut, 21: Valve rod, 22: Stem, 23: Operation handle, 24: Power transmission mechanism, 25: Switching lever, 26: Cylindrical member, 27: Warm foil, 28: Warm , 29: Holder, 30: Support mechanism, 31: Base member, 32: Spacer, 33: Hexagon bolt, 34: Bracket, 35, 36: Screw hole, 37: Nut, 38: Ring member, 39: Long Member, 40: annular member, 41, 42: bolt, A, B: flange part, F, G: bolt

Claims (5)

The pipe equipment is supported by a support member having a flange portion B fixed to the flange portion A of the pipe equipment from one side, and instead of the manual handle attached to the pipe equipment, a valve drive device equipped with a motor is used. It is a method of attaching to
The first step of removing the manual handle from the valve stem to which the support member and the manual handle are connected, and
The second step of fixing the support mechanism to the flange portions A and B, and
A method for attaching a valve drive device, which comprises connecting the valve drive device to the valve rod and having a third step of fixing the valve drive device to the support mechanism. In the method for attaching the valve drive device according to claim 1, a bolt F having a tip end fitted in a screw hole formed in the flange portion A is inserted into the flange portion B.
The support mechanism includes a base member that is in close contact with the flange portion B from one side, and a bolt G that is attached to the base member and whose tip end is in close contact with the tip end portion of the bolt F in the screw hole from the other side. A method of mounting a valve drive device, which is characterized by being provided. In the method for attaching the valve drive device according to claim 2, the flange portion A has a diameter-expanded region on the other side that expands in diameter toward the flange portion B, and the diameter-expanded region includes the screw hole. A method of mounting a valve drive device, characterized in that an opening is formed. The method for attaching a valve drive device according to claim 2 or 3, wherein there are three or more base members, each of which is in close contact with the flange portion B at different positions in the circumferential direction of the flange portion B. How to install the valve drive device. A motor is fixed to the flange portion A of the pipe equipment and the flange portion B fixed to the flange portion A from one side by a bolt F whose tip portion is fitted in a screw hole formed in the flange portion A. It is a support mechanism for supporting a valve drive device provided with
It is characterized by including a base member that is in close contact with the flange portion B from one side, and a bolt G that is attached to the base member and whose tip end is in close contact with the tip end portion of the bolt F from the other side in the screw hole. Support mechanism.

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