JP2020159521A - Manual butterfly valve - Google Patents

Abstract

To improve operability for opening/closing in a manual butterfly valve.SOLUTION: A valve rod 11 is rotatably housed in a shaft hole 10c of a valve box 10 in the manual butterfly valve 3 along a valve axial line L1. The valve rod 11 and a valve body 13, which opens and closes a valve flow passage 10d, are integrally rotated. A handle 20 provided at the tip part of the valve box 10 can rotate between a lock position and an unlock position around a connection axial line L2 orthogonal to the valve axial line L1 by a connection mechanism 30, and is rotatably connected to the valve rod 11 around the valve axial line L1. A rotation lock mechanism 40 prevents the handle 20 from rotating around the valve axial line L1 at the lock position, and allows it at the unlock position.SELECTED DRAWING: Figure 1

Description

The present invention relates to a butterfly valve that is opened and closed by the rotation of a valve body, and more particularly to a manual butterfly valve that is manually opened and closed.

Generally, the valve box of a butterfly valve is formed so that the valve flow path and the shaft hole intersect each other. The valve body is housed in the valve flow path, and the valve stem is housed in the shaft hole. The valve stem is fixed to the valve body. A handle is provided at the tip of the valve box. For example, the handle is formed in a rod shape orthogonal to the valve stem and is fixed to the tip of the valve stem. A lock lever is rotatably provided on the handle. The lock lever at all times is engaged with the lock plate at the tip of the valve box. This locks the handle so that it cannot rotate.
When opening and closing, hold the lock lever together with the handle. As a result, the lock lever is tilted and the lock is released. While holding the lock lever, turn the handle around the valve axis along the shaft hole. As a result, the valve stem and the valve body are rotated integrally with the handle. The valve flow path can be opened and closed (opening adjustment) by rotating the valve body. When the lock lever is released, the spring engages the lock lever with the lock plate again.

Japanese Unexamined Patent Publication No. 2009-07556 Japanese Unexamined Patent Publication No. 2004-2257883

In the conventional manual butterfly valve as described above, not only the force of pushing and pulling the handle but also the grip force of gripping the lock lever against the spring force is required for the opening / closing (opening adjustment) operation. .. Therefore, the force required for the opening / closing operation is large and difficult to operate. Especially when the diameter is large, a large torque is required just to turn the handle, so it is a heavy burden to rotate while applying grip strength.
In view of such circumstances, an object of the present invention is to improve the opening / closing operability of the manual butterfly valve.

In order to solve the above problems, the present invention is a manual butterfly valve that is manually opened and closed.
A valve box having a shaft hole along the valve axis that intersects the valve flow path,
A valve rod housed in the shaft hole so as to be rotated around the valve axis,
A valve body provided in the valve flow path, fixed to the valve rod, and opened and closed by rotating integrally with the valve rod.
A handle provided at the tip of the valve box and
The handle can be rotated between the lock position and the unlock position around the connecting axis orthogonal to the valve axis with respect to the tip of the valve stem, and integrally with the valve stem around the valve axis. A connection mechanism that connects rotatably and
It is provided between the tip of the valve box and the handle, and is provided with a rotation lock mechanism that blocks the rotation of the handle around the valve axis at the lock position and allows it at the unlock position. It is characterized by that.

In the butterfly valve, when opening and closing, the handle is first turned around the connecting axis to bring it to the unlocked position. Unlocking allows the handle to rotate around the valve axis.
Subsequently, by rotating the handle around the valve axis, the valve stem and the valve body are rotated around the valve axis integrally with the handle. The valve flow path is opened and closed (opening adjustment) by the rotation of the valve body.
It can be opened and closed simply by pushing and pulling the handle and turning it, and there is no need to grip the handle with a large grip. Therefore, the ease of operation of the butterfly valve is improved.

The connecting mechanism is provided at a beam portion that cantileverly protrudes from the tip end portion of the valve rod in a direction intersecting the valve axis and the connecting axis, and at the intermediate portion or the tip portion of the beam portion. It is preferable to include a hinge that rotatably connects the above connecting axes.
As a result, the hinge can be arranged away from the valve stem and the tip of the valve box.

The handle has a rod shape that is inclined along the beam portion at the locked position and inclined with respect to the beam portion at the unlocked position, and the hinge is arranged at the intermediate portion of the handle. preferable.
As a result, the handle at the locked position can be stably held along the beam portion. When opening and closing, the tip of the handle can be pushed and pulled to rotate it around the connecting axis and tilt it to unlock it.

The rotation lock mechanism includes a plurality of engagement receiving portions provided at intervals in the circumferential direction of the tip end portion of the valve box, and an engagement portion provided on the handle, and the handle is in the lock position. At this time, it is preferable that the engaging portion is engaged with the engaging receiving portion according to the angle of the handle around the valve axis.
As a result, the butterfly valve can be locked by arbitrarily adjusting the opening degree.

It is preferable that the butterfly valve further includes an urging means for rotationally urging the handle toward the locked position.
This allows the handle to be held in the locked position at all times. At the time of opening / closing operation, the opening / closing lock is released by turning the handle to the unlocked position against the urging means.

According to the present invention, it is possible to improve the opening / closing operability of the manual butterfly valve.

FIG. 1 is a front view showing a butterfly valve according to an embodiment of the present invention in a closed state and a locked state. FIG. 2 is a side sectional view of the butterfly valve along the line II-II of FIG. FIG. 3A is a plan sectional view of the butterfly valve in the closed state along the line IIIa-IIIa of FIG. FIG. 3B is a plan sectional view of the butterfly valve in the open state. FIG. 4 is a plan sectional view taken along the line IV-IV of FIG. FIG. 5 is a front view showing the butterfly valve in an unlocked state.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a butterfly valve 3 is provided between the first pipe 1 and the second pipe 2. The butterfly valve 3 opens and closes the flow path between the pipes 1 and 2. The butterfly valve 3 is a manual butterfly valve that is manually opened and closed.

As shown in FIG. 2, the manual butterfly valve 3 includes a valve box 10, a valve rod 11, a seat ring 12, a valve body 13, and a handle 20.
A shaft hole 10c and a valve flow path 10d are formed in the valve box 10. Shaft hole 10c extends through the valve body 10 up and down along the valve axis L _1. The valve flow path 10d penetrates the wafer-type valve box 10 in the thickness direction (left and right in FIG. 2). Valve axis _{L 1} and thus the shaft hole 10c is, intersects the valve passage 10d.
The material of the valve box 10 is not particularly limited as long as the required strength can be obtained, and may be metal (iron, copper, copper alloy, brass, aluminum, stainless steel, etc.) or porcelain, but it has chemical resistance and corrosion resistance. From the viewpoint of properties, it is preferably a resin, more preferably a thermoplastic resin, specifically, polyvinyl chloride, polypropylene, polystyrene, ABS resin, polytetrafluoroethylene, perfluoroalkyl vinyl ether copolymer, polychlorotrifluoro. Examples include ethylene.

The valve rod 11 is housed in the shaft hole 10c. The valve stem 11, for example, it is formed in the shape of a square or rectangular cross-sectional shape extending straight along the valve axis L _1, and is rotatably held about the valve axis L _1. The tip end portion (upper end portion in FIGS. 1 and 2) of the valve stem 11 protrudes from the shaft hole 10c. The intermediate portion of the valve stem 11 penetrates the valve flow path 10d.
Examples of the material of the valve stem 11 include metals such as iron, steel, copper, copper alloy, brass, aluminum, and stainless steel.

A seat ring 12 is provided on the inner peripheral surface of the valve flow path 10d. In the natural state, the seat ring 12 is formed in an annular shape having a substantially quadrangular cross-sectional shape, for example.
The material of the seat ring 12 is not particularly limited as long as it is a non-permeable elastic material such as rubber, but preferably ethylene propylene rubber (EPDM), propylene rubber, isoprene rubber, chloroprene rubber, chlorosulphonized rubber, etc. Examples thereof include ditrill rubber, styrene-butadiene rubber, chlorinated polyethylene, and fluororubber.

A valve body 13 is provided in the valve flow path 10d. As shown in FIG. 1, the valve body 13 is formed in a substantially disk shape. As shown in FIG. 3, the valve body 13 is a eccentric valve which is eccentric relative to the valve axis L _1, it may be a central valve.
As shown in FIG. 2, the valve rod 11 penetrates the valve body 13. The valve body 13 and the valve rod 11 are fixed to each other.

The valve body 13 is rotatable between an open position around the valve stem 11 and the valve shaft line L ₁ together with the (fully open position) and a closed position. As a result, the butterfly valve 3 is opened / closed or the opening degree is adjusted. As shown in FIG. 3A, when the valve body 13 is in the closed position, the valve body 13 is seated on the seat ring 12 to close the valve flow path 12. As shown in FIG. 3B, when the valve body 13 is in the open position, the valve body 13 is separated from the seat ring 12 to open the valve flow path 12.
The material of the valve body 13 is not particularly limited as long as the required strength can be obtained, and may be metal (iron, copper, copper alloy, brass, aluminum, stainless steel, etc.) or porcelain, but has chemical resistance and corrosion resistance. From the viewpoint of properties, it is preferably a resin, more preferably a thermoplastic resin, specifically polyvinyl chloride, polypropylene, polystyrene, ABS resin, polytetrafluoroethylene, perfluoroalkyl vinyl ether copolymer, and polychlorotrifluoro. Examples include ethylene.

As shown in FIGS. 1 and 2, a handle 20 is provided at the tip end portion (upper end portion in FIG. 1) of the valve box 10. The handle 20 is formed in a shaped case which rods and bottom extending in a direction intersecting the valve axis L ₁ from the distal end portion of the valve casing 10 is opened. The base 21 of the handle 20 is arranged on the tip of the valve box 10. The tip portion of the handle 20 (specifically, the portion on the tip side of the hinge 32 described later) is the handle portion 22. A pin insertion hole 23d is formed in the side wall 23 of the handle portion 22.
The material of the handle 20 is not particularly limited, and may be a resin (polyvinyl chloride, polypropylene, polystyrene, ABS resin, polytetrafluoroethylene, perfluoroalkyl vinyl ether copolymer, polychlorotrifluoroethylene, etc.) or a metal (iron). , Copper, copper alloy, brass, aluminum, stainless steel, etc.), and other porcelain, etc. may be used.

The handle 20 is connected to the tip end portion of the valve stem 11 via the connecting mechanism 30. The connecting mechanism 30 includes a beam portion 31 and a hinge 32. Beam portion 31 is fixed to the connecting block 14 of the valve stem tip 11, which protrudes therefrom perpendicular to the valve axis L ₁ (cross) to form have the single direction.

A hinge 32 including a shaft member is provided in the middle portion of the beam portion 31. The rotation axis of the hinge 32 (hereinafter referred to as “connecting axis L ₂ ”) is directed in a direction orthogonal (intersecting) with both the beam portion 31 and the valve stem 11 (direction orthogonal to the paper surface in FIG. 1).
In other words, the beam portion 31 is perpendicular to the valve axis L ₁ and the coupling axis L ₂ (cross).
Examples of the material of the beam portion 31 and the hinge 31 include metals such as iron, steel, copper, copper alloy, brass, aluminum, and stainless steel.

Handle 20, through the hinge 32, and is rotatably coupled about the connecting axis L ₂ relative to the beam portion 31 and thus the valve rod 11. And, the handle 20 via a hinge 32 and the beam portion 31, while for example 90 ° around a closed position and an open position together with the valve rod 11 and the valve body 13 around the valve axis L ₁ (fully open position) It is rotatable within the range of (Fig. 4). When the handle 20 is in the closed position, the valve body 13 is also in the closed position, and the valve flow path 10d is closed (FIG. 3A). When the handle 20 is in the open position, the valve body 13 is also in the open position, and the valve flow path 10d is opened (FIG. 3 (b)).
In FIG. 4, the fine line indicates the handle 20 in the closed position, and the alternate long and short dash line indicates the handle 20 in the open position (fully open position).

As shown in FIGS. 1 and 5, the rotatable range of about coupling axis L ₂ of the handle 20 is restricted between a locked position and an unlocked position.
As shown in FIG. 1, at the lock position, for example, the base 21 of the handle 20 is in contact with the upper surface 41a (lock position regulating portion) of the lock plate 41 described later at the tip end (upper end portion) of the valve box 10. .. As a result, the handle 20 cannot rotate any further in the locking direction (counterclockwise in FIG. 1). The handle 20 at the locked position is along the beam portion 31. The entire beam portion 31 and the connecting block 14 are housed inside the handle 20.

In the locked position, the pin insertion hole 23d of the front end portion of the handle 20, and a pin insertion hole 31d of the distal end of the beam portion 31 overlaps in a direction parallel to the connection axis L _2. By inserting a stop pin (not shown) into these pin insertion holes 23d and 31d, it is possible to prevent the handle 20 from being in the unlocked position due to an unexpected external force.

As shown in FIG. 5, at the unlocked position, for example, the tilt restricting projection 25 (unlocking position restricting portion) inside the handle 20 hits the beam portion 31. As a result, the handle 20 can no longer rotate in the unlocking direction (clockwise in FIG. 5). The handle 20 at the unlocked position is tilted with respect to the beam portion 31, the base portion 21 is separated upward from the tip portion of the valve box 10, and the handle portion 22 is tilted downward.

A spring 34 (a urging means) is added to the connecting mechanism 30. The spring 34 is composed of, for example, a torsion coil spring and is fitted on the outer periphery of the hinge 32. The spring force of the spring 34 acts on the handle 20 in the locking direction (clockwise in FIGS. 1 and 5). That is, the handle 20 is rotationally urged toward the lock position.
The spring 34 is not limited to the torsion coil spring, and may be a leaf spring or the like.

As shown in FIG. 1, a rotation lock mechanism 40 is provided between the tip of the valve box 10 and the handle 20. The rotation lock mechanism 40 includes a lock plate 41 and a partial gear portion 24. The lock plate 41 is formed in a disk shape and covers the tip end portion (upper end portion) of the valve box 10. As shown in FIG. 4, a gear portion 42 is provided on the outer peripheral portion of the lock plate 41 over a range of, for example, about a quarter of a circumference. The valley portion between the adjacent teeth of the gear portion 42 is the engaging receiving portion 42a. A plurality of engaging receiving portions 42a are arranged at intervals in the circumferential direction of the tip portion of the lock plate 41 and thus the valve box 10, preferably at equal intervals.

As shown in FIGS. 1 and 4, a partial gear portion 24 is provided at the bottom of the base portion 21 of the handle 20. The partial gear portion 24 is arranged at a portion 180 ° opposite to the handle portion 22 with the accommodating portion of the central connecting block 14 in the handle base 21 interposed therebetween. The partial gear portion 24 has an engaging portion 24a composed of several teeth (three in FIG. 4). At an arbitrary rotation angle between the closed position and the open position (fully open position), when the handle 20 is in the locked position, the partial gear portion 24 meshes with a part of the gear portion 42. Specifically, the engaging portion 24a is engaged with the engaging receiving portion 42a in accordance with the angle around the valve axis L ₁ of the handle 20. Thus, the handle 20 is prevented from rotating around the valve axis L _1.

As shown in FIG. 5, at an arbitrary rotation angle between the closed position and the open position (fully open position), when the handle 20 is in the unlocked position, the partial gear portion 24 is disengaged from the gear portion 42 and is engaged with the engaging portion 24a. The engagement with the engagement receiving portion 42a is released. Thus, the handle 20 is allowed to rotate about the valve axis L _1.
Although not shown, the butterfly valve 3 is provided with a closing direction regulating section that regulates the rotation of the handle 20 in the closing direction and thus the closing position, and an opening direction regulating section that regulates the rotation in the opening direction and thus the opening position. ing.

In the manual butterfly valve 3, the handle 20 is always held in the locked position by the spring 34. The partial gear portion 24 meshes with a part of the gear portion 42.
When opening and closing the manual butterfly valve 3, if the stop pin is attached, it is pulled out from the insertion holes 23d and 31d, and then the handle portion 22 of the handle 20 is pushed down against the spring 34. Thus, as shown in FIG. 5, the handle 20, by being rotated about the coupling axis L _2, the base 21 is a handle 20 so as to face the upper is tilted. Along with this, the partial gear portion 24 is disengaged from the gear portion 42, and the handle 20 is in the unlocked position.
Then, by rotating the handle 20 about the left valve axis L ₁ is tilted by angle adjusting. That is, the handle 20 is pushed and pulled in the horizontal direction orthogonal to the beam portion 31. At this time, the valve stem 11 and the valve body 13 to the handle 20 integrally is rotated about the valve axis L _1. The valve flow path 10d is opened and closed (opening adjustment) by the rotation of the valve body 13.
The opening and closing operation can be performed simply by pushing and pulling the handle 20 and turning it, and it is not necessary to hold the handle 20 with a large grip force. Therefore, the ease of operation of the butterfly valve 3 can be improved.
When the handle 20 around the valve shaft line L ₁ is positioned to a desired angle, back horizontally from the inclined position. As a result, the partial gear portion 24 meshes with the portion of the gear portion 42 corresponding to the desired angle. As a result, the handle 20 is locked at the desired angle. Moreover, the valve body 13 is held at an opening degree corresponding to the desired angle.
In this way, the manual butterfly valve 3 can be easily adjusted in opening degree or opened / closed and locked easily without requiring a large force, and the burden on the operator during the opening / closing operation can be reduced.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the portion of the beam portion 31 on the tip side of the hinge 32 may be omitted. The beam portion 31 may be shortened and a hinge 32 may be provided at the tip portion thereof.
The beam portion 31 may be omitted, and the handle 20 may be connected to the tip end portion of the valve stem 11 via a hinge 32.
The seat ring 12 may have a tubular shape extending in the path length direction of the valve flow path 10d. The valve flow path 10d may be defined by the inner peripheral surface of the seat ring 12.

The present invention can be applied to a butterfly valve that opens and closes a piping flow path.

3 Manual butterfly valve 10 Valve box 10c Shaft hole 10d Valve flow path L ₁ Valve axis L ₂ Connecting axis 11 Valve rod 12 Seat ring 13 Valve body 20 Handle 21 Base 22 Handle 23 Side plate 23d Pin insertion hole 24 Gear section 24a Joint 25 Tilt control protrusion (regulation part)
30 Connecting mechanism 31 Beam 31d Pin insertion hole 32 Hinge 34 Spring (urging means)
40 Rotation lock mechanism 41 Lock plate 41a Upper surface (regulator)
42 Gear part 42a Engagement receiving part

Claims (5)

A manual butterfly valve that opens and closes manually.
A valve box having a shaft hole along the valve axis that intersects the valve flow path,
A valve rod housed in the shaft hole so as to be rotated around the valve axis,
A valve body provided in the valve flow path, fixed to the valve rod, and opened and closed by rotating integrally with the valve rod.
A handle provided at the tip of the valve box and
The handle can be rotated between the lock position and the unlock position around the connecting axis orthogonal to the valve axis with respect to the tip of the valve stem, and integrally with the valve stem around the valve axis. A connection mechanism that connects rotatably and
A rotation lock mechanism provided between the tip of the valve box and the handle, which prevents the handle from rotating around the valve axis at the lock position and allows the handle at the unlock position. A manual butterfly valve that features that. The connecting mechanism is provided at a beam portion that cantilevers protrude from the tip end portion of the valve rod in a direction intersecting the valve axis and the connecting axis line, and at an intermediate portion or a tip portion of the beam portion. The manual butterfly valve according to claim 1, further comprising a hinge that rotatably connects the valve around the connecting axis. The handle has a rod shape that is inclined along the beam portion at the locked position and inclined with respect to the beam portion at the unlocked position, and the hinge is arranged at the intermediate portion of the handle. The manual butterfly valve according to claim 2. The rotation lock mechanism includes a plurality of engagement receiving portions provided at intervals in the circumferential direction of the tip end portion of the valve box, and an engagement portion provided on the handle, and the handle is in the lock position. The manual butterfly valve according to claim 3, wherein the engaging portion is engaged with the engaging receiving portion corresponding to the angle of the handle around the valve axis. The manual butterfly valve according to any one of claims 1 to 4, further comprising an urging means for rotationally urging the handle toward the locked position.

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