JP2015040620A - Valve device, and method for detecting opening/closing state of valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device capable of stably detecting an opening/closing state of a built-in on-off valve, and a method for detecting the opening/closing state of the valve device.SOLUTION: The valve device 1 comprises: a valve body 50 having a fluid flow passage 53 through which fluid passes; an on-off valve 30 for restraining a flow rate of the fluid; a spindle 20 for moving the on-off valve 30 to a fully-closed position for blocking the fluid flow passage 53 and a fully-opened position for fully opening the fluid flow passage 53; and an opening/closing detection mechanism 70 for detecting the opening/closing state of the on-off valve 30. Also, a method for detecting the opening/closing state of the valve device 1 is provided. The opening/closing detection mechanism 70 comprises: a planetary gear part 71 rotating in connection with rotation of the spindle 20, and a limit switch capable of switching the on/off state. The planetary gear part 71 is provided with a convex part for switching the on/off state of the limit switch at the fully-closed position or/and the fully-opened position.

Description

  The present invention relates to, for example, a valve device that circulates fluid such as gas by opening an on-off valve, and an open / closed state detection method for the valve device.

For example, in a valve device attached to a storage container that stores a fluid such as gas, an on-off valve that opens and closes a flow path through which the fluid flows is built in the valve device. For this reason, the valve device has a problem that the open / close state of the open / close valve cannot be easily confirmed from the outside.
Therefore, various techniques for confirming the open / closed state of the open / close valve from the outside in the valve device have been proposed.

  For example, a monitoring system for a valve device described in Patent Document 1 includes a semiconductor substrate as a strain sensing unit having a bridge circuit composed of a plurality of impurity diffusion resistors, a valve rod, a valve yoke, an elastic body, a shaft of the valve device. It is said that the open / closed state can be confirmed from the outside by a mechanical load acting on the valve device obtained from the measured value of the bridge circuit.

  That is, it can be said that the monitoring system of the valve device of Patent Document 1 predicts the open / closed state of the on-off valve by detecting a mechanical load acting on the valve stem. However, in the valve system monitoring system of Patent Document 1, if an error occurs in the measured value due to deformation of the valve stem due to external factors such as ambient temperature, the open / close state detected by the mechanical load and the actual open / close valve There is a risk that unexpected opening and closing will not occur and unexpected problems will occur. For this reason, in the method of detecting the open / close state based on the mechanical load of the valve stem, there is a possibility that the open / close state of the open / close valve cannot be detected stably.

JP 2008-39126 A

  An object of this invention is to provide the valve apparatus which can detect the opening / closing state of the built-in opening / closing valve stably, and the opening / closing state detection method of a valve apparatus in view of the above-mentioned problem.

  The present invention includes a valve main body having a flow path through which a predetermined fluid flows, an on-off valve disposed on the flow path to regulate the flow rate of the predetermined fluid, and the flow path being configured by receiving a rotation operation. A valve device comprising: a spindle that changes the open / close state by moving the open / close valve to a fully closed position that closes and a fully open position that fully opens the flow path; and a detection unit that detects the open / close state of the open / close valve. And an open / closed state detection method for the valve device, wherein the detecting means includes a rotating body that rotates in conjunction with rotation of the spindle, and a detection switch section that can be switched between ON / OFF states, and the rotating body. In addition, a switching unit that switches an ON / OFF state of the detection switch unit at the fully closed position and / or the fully opened position is provided.

The predetermined fluid can be composed of nitrogen, a gas such as air or gas, or a liquid.
The rotating body may be a planetary gear mechanism having a sun gear that rotates in synchronization with the spindle, or a substantially circular plate that rotates in synchronization with the spindle.
By protecting the detection switch unit with a metal or resin case, the detection switch unit can be at least one limit switch excellent in environmental resistance and mechanical resistance.

Switching the ON / OFF state may include switching from the ON state to the OFF state, or switching from the OFF state to the ON state.
The switching part may be a substantially convex convex part or a substantially concave concave part that can switch the ON / OFF state of the detection switch part.

According to the present invention, the open / close state of the built-in on-off valve can be detected more stably.
Specifically, the valve device and the open / closed state detection method of the valve device by the rotating body that rotates in conjunction with the rotation of the spindle are not affected by the ambient temperature or the like, and the ON / OFF state of the detection switch unit is set. Can be switched.

  At this time, the valve device and the open / closed state detection of the valve device are arranged by arranging the rotating body and the detection switch unit so that the detection switch unit is in the ON state or the OFF state in the fully closed position and / or the fully open position. In the method, even if the ambient temperature is such that the spindle is deformed, the open / closed state detected by the detecting means and the actual open / closed state of the open / close valve can be made to substantially coincide with each other more reliably.

  Furthermore, when measuring the load acting on the spindle, the open / closed state is detected electrically. Therefore, depending on the usage environment and aging, maintenance such as inspection and calibration of the semiconductor substrate and strain gauge that measure the load must be performed frequently. There is a risk that stable reliability cannot be ensured.

  On the other hand, the spindle and the rotating body are mechanically interlocked, and the ON / OFF state of the detection switch unit is mechanically switched by the rotating body. The frequency of maintenance can be reduced, and the reliability of the detection means can be improved.

  Therefore, the valve device and the open / close state detection method of the valve device detect the open / close state of the built-in open / close valve more stably than the case of detecting the open / close state of the open / close valve by the load acting on the spindle. The reliability of the detection means can be improved.

  As an aspect of the present invention, the detection switch unit includes a first detection switch and a second detection switch, and the first detection switch is disposed at a position facing the switching unit of the rotating body in the fully closed position. And a 2nd detection switch can be arrange | positioned in the position facing the switching part of the said rotary body in the said full open position.

  According to the present invention, for example, when the detection switch portion is configured by one detection switch, only one of the fully closed position and the fully open position can be detected, whereas the valve device includes the open / close valve in the fully closed position. It can detect with 1 detection switch, and can detect the on-off valve of a full open position with a 2nd detection switch, respectively. For this reason, the valve device can detect the open / close state of the open / close valve more stably and reliably.

  Furthermore, when the on-off valve is positioned between the fully closed position and the fully open position, the rotating body does not switch the ON / OFF state of the first detection switch and the second detection switch. That is, the valve device can detect with the first detection switch and the second detection switch that the flow path is opened so that a predetermined fluid can flow.

  Therefore, the valve device can detect the open / close state of the open / close valve in more detail and stably by switching the ON / OFF state of the first detection switch or the second detection switch.

  Further, as an aspect of the present invention, a rotating body of the detecting means includes a sun gear that rotates and synchronizes with the spindle, an annular outer gear that rotates coaxially with the sun gear, and at least one planetary gear that meshes with the sun gear and the outer gear. The outer gear includes the switching unit that switches the ON / OFF state of the detection switch, and the planetary gear mechanism includes the opening / closing valve between the fully closed position and the fully opened position. The outer gear that is rotated by the rotation of the sun gear accompanying the rotation of the spindle for movement may be configured with a gear ratio such that the number of rotations of the outer gear is less than one rotation.

According to the present invention, it is possible to prevent the detection switch from being repeatedly switched by the switching unit of the planetary gear mechanism while the on-off valve moves between the fully closed position and the fully open position.
Specifically, since the spindle rotates several times while the on-off valve moves between the fully closed position and the fully open position, for example, when the rotating body is a substantially disk, the detection switch is turned on in synchronization with the rotation of the spindle. / OFF state is switched repeatedly. For this reason, there is a problem that the detection switch may not only be damaged at an early stage, but also it is difficult to check the open / close state of the on-off valve.

  Therefore, by configuring the rotating body with a planetary gear mechanism in which the rotation speed of the outer gear is less than one rotation, the valve device switches the ON / OFF state of the detection switch only once while the spindle rotates several times. Can do. For this reason, the valve device can prevent the ON / OFF state of the detection switch from being repeatedly switched, and can easily check the open / close state of the open / close valve.

  Further, in the case of having a plurality of planetary gears, the planetary gear mechanism can disperse the load acting on the sun gear and transmit it to the outer gear by the plurality of planetary gears meshed with the sun gear. For this reason, for example, even if the spindle is strongly tightened in the fully closed position or the fully open position, the valve device can distribute the load acting through the spindle by the plurality of planetary gears, thereby preventing damage to the sun gear and the like. be able to.

In addition, the planetary gear mechanism enables the valve device to form a rotating body that is small and has a large reduction ratio.
Therefore, the valve device can detect the open / close state of the open / close valve more reliably and further improve the reliability of the detection means by configuring the rotating body with a planetary gear mechanism.

In addition, as an aspect of the present invention, it is possible to provide notifying means for notifying the open / closed state when the detecting means detects the open / closed state of the open / close valve.
The notification means can be notification by light emission, notification by sound, light emission through communication, sound, notification by explicit means, or the like, and can be an independent notification means.

  According to this invention, the open / closed state of the on-off valve detected by the detecting means can be notified visually or audibly. For this reason, the valve device can make it unnecessary to check the open / closed state by operating a handle connected to the spindle, for example. Alternatively, the valve device can facilitate confirmation of the open / closed state from a distance or confirmation of the open / closed state in a dark place by notification by light emission.

  Furthermore, when a predetermined fluid harmful to the human body is handled, the valve device may be disposed in an isolated place. Therefore, the notification device through communication can enable the valve device to remotely monitor the open / close state of the open / close valve even when the valve device is disposed in an isolated place.

  In addition, for example, in the case of a notification means provided with notification by light emission and notification through communication, the valve device can directly monitor the open / close state of the on-off valve by using a power source used for light emission as a communication power source. And remote monitoring can be easily achieved.

At this time, by using both the power source for light emission and the power source for communication, it is possible to reduce the size of the valve device provided with the notification means for informing through light emission and communication.
Therefore, the valve device can make it easier to check the open / close state of the open / close valve by providing the notification means.

  According to the present invention, it is possible to provide a valve device that can stably detect the open / closed state of a built-in open / close valve, and a method for detecting the open / closed state of the valve device.

The front view which shows the external appearance from the front view in a valve apparatus. The top view which shows the external appearance from the planar view in a valve apparatus. AA arrow sectional drawing in FIG. The disassembled perspective view which shows the internal structure in an opening / closing detection mechanism. The disassembled perspective view which shows the component in an opening-and-closing detection mechanism from upper direction. The disassembled perspective view which shows the component in an opening-and-closing detection mechanism from the downward direction. Explanatory drawing explaining the outer gear and limit switch in a fully closed state. AA arrow sectional drawing in the state in the middle of opening and closing. Explanatory drawing explaining the outer gear and limit switch in the state in the middle of opening and closing. AA arrow sectional drawing in a fully open state. Explanatory drawing explaining the outer gear and limit switch in a fully open state.

An embodiment of the present invention will be described below with reference to the drawings.
First, the valve device 1 according to the present embodiment will be described in detail with reference to FIGS.

  1 shows a front view of the external appearance of the valve device 1, FIG. 2 shows a plan view of the external appearance of the valve device 1, FIG. 3 shows a cross-sectional view taken along line AA in FIG. 5 is an exploded perspective view of the internal configuration of the open / close detection mechanism 70, FIG. 5 is an exploded perspective view of the components of the open / close detection mechanism 70 from above, and FIG. 6 is an exploded perspective view of the components of the open / close detection mechanism 70 from below. FIG. 7 is an explanatory diagram for explaining the outer gear 713 and the limit switch 74 in the fully closed state.

7A is a plan view of the opening / closing detection mechanism 70 in which the top cover 72 is not shown, and FIG. 7B is a plan view of the opening / closing detection mechanism 70 in which the top cover 72 and the lower case 73 are shown by two-dot chain lines. A front view is shown.
Further, the upper side (rotation handle 10 side) in FIG. 1 is the upper side in the valve device 1, and the lower side (valve body 50 side) in FIG. 1 is the lower side in the valve device 1.

  As shown in FIG. 1, the valve device 1 accepts a rotation operation of the rotary handle 10 to switch between an open state in which fluid flows from the left side to the right side in FIG. 1 and a closed state in which the flow is blocked. This is a piping valve that can be configured.

  More specifically, for example, the valve device 1 is connected to a pipe that communicates a storage tank (not shown) that stores a fluid such as harmful gas and a predetermined device (not shown) that receives a supply of fluid, and the valve device 1 The left side of 1 is connected to the storage tank side, and the right side of the valve device 1 is connected to a predetermined device side.

  As shown in FIGS. 1 to 3, the valve device 1 includes a rotary handle 10 that receives a rotation operation, a spindle 20 connected to the rotary handle 10, an on-off valve 30 fitted to the spindle 20, the spindle 20, and an open / close A sleeve 40 that pivotally supports the valve 30, a spindle 20, an on-off valve 30, and a sleeve 40 are accommodated, and the valve body 50 is connected to a storage tank and a predetermined device.

  Furthermore, between the rotary handle 10 and the valve body 50, an opening / closing explicit mechanism 60 that clearly indicates the opening / closing state of the opening / closing valve 30 and an opening / closing detection mechanism 70 that detects the opening / closing state of the opening / closing valve 30 are provided. A notification unit 80 that notifies the open / close state of the on-off valve 30 is provided on the front side.

  As shown in FIGS. 1 to 3, the rotary handle 10 includes a substantially circular handle portion 11 in plan view, and a spoke portion 12 that extends obliquely downward from three locations in the circumferential direction of the handle portion 11 toward the radial center. The handle portion 11 and the handle central portion 13 disposed on the same axis are integrally formed.

  As shown in FIG. 3, the handle central portion 13 includes a spindle mounting portion 13a to which the spindle 20 is fitted, a tapered portion 13b extending from the spindle mounting portion 13a, and a cylindrical portion 13c extending from the tapered portion 13b. It is integrally formed in a substantially inverted cup shape. Further, as shown in FIG. 2, the handle central portion 13 is formed with opening portions 14 at three positions spaced apart in the circumferential direction.

  More specifically, as shown in FIG. 3, the spindle mounting portion 13a has a substantially cylindrical shape with a bottom, and the spindle 20 (upper fitting portion 22 to be described later) is fitted in the center in the radial direction. A rectangular through hole (not shown) is formed.

  As shown in FIG. 3, the tapered portion 13 b is formed in a tapered shape having a diameter that increases from the upper end of the spindle mounting portion 13 a to the lower side, and the inner diameter side end portion of the spoke portion 12 in the rotary handle 10 has a tapered large diameter side. It is connected.

As shown in FIG. 3, the cylindrical portion 13c extends downward from the large diameter side of the tapered portion 13b, and is formed in a substantially cylindrical shape having an open bottom surface.
As shown in FIG. 2, the explicit opening 14 is an opening having a size that exposes a marking of an explicit board 63 described later, and opens across the tapered portion 13 b and the cylindrical portion 13 c at equal intervals in the circumferential direction. At the same time, it is formed in three places.

  As shown in FIG. 3, the spindle 20 has a substantially columnar shape that extends in the vertical direction, and includes a nut screwing portion 21 that forms a screw thread, an upper fitting portion 22 that has a substantially square pillar shape, and a substantially cylindrical body portion. 23 and a substantially square columnar lower fitting portion 24 are integrally formed on the same axis in this order from above.

  As shown in FIG. 3, the on-off valve 30 includes a substantially cylindrical valve upper portion 31 extending in the vertical direction, a valve bottom portion 32 extending to the lower end of the valve upper portion 31, and a valve end extending to the lower end of the valve bottom portion 32. The portion 33 is integrally formed on the same axis in this order from above.

  As shown in FIG. 3, the valve upper portion 31 is formed in a substantially cylindrical shape having a fitting hole 34 having a substantially square shape in plan view into which the lower fitting portion 24 of the spindle 20 can be inserted. Further, on the outer peripheral surface of the valve upper portion 31, a thread portion 35 that is screwed with a sleeve 40 described later is formed. The fitting hole 34 is formed to have a size that restricts rotation of the spindle 20 in the circumferential direction and allows movement in the vertical direction.

As shown in FIG. 3, the valve bottom portion 32 has a predetermined thickness in the vertical direction and is formed in a substantially cylindrical shape having a diameter substantially equal to the diameter of the valve upper portion 31. Further, the bottom surface of the valve bottom portion 32 is formed in a shape that is in close contact with a valve seat 54a of the valve body 50, which will be described later, and a seal ring (not shown) is attached to a portion recessed upward.
As shown in FIG. 3, the valve end portion 33 is formed in a substantially cylindrical shape having an outer diameter smaller than the outer diameter of the valve bottom portion 32 and an outer diameter that fits into an inflow passage 55 of the valve body 50 described later. Yes.

  As shown in FIG. 3, the sleeve 40 includes a substantially cylindrical sleeve upper portion (not shown) having an inner diameter substantially equal to the outer diameter of the body portion 23 of the spindle 20, and an outer diameter of the valve upper portion 31 of the on-off valve 30. A substantially cylindrical sleeve lower portion (not shown) having a substantially equal inner diameter is integrally formed coaxially in this order from above.

  Furthermore, a screwing portion 41 into which the screw thread portion 35 of the on-off valve 30 is screwed is formed on the inner surface of the lower portion of the sleeve. In addition, two O-rings (not shown) are attached to the inner peripheral surface of the upper portion of the sleeve and the outer peripheral surface of the lower portion of the sleeve, respectively.

  As shown in FIG. 3, the valve main body 50 is configured by arranging a housing cover 51 and a housing 52 in this order from above, and fastening the housing cover 51 and the housing 52 with a plurality of bolts 2.

  As shown in FIG. 3, the housing cover 51 has an annular shape having a predetermined thickness in the vertical direction and has an inner diameter substantially equal to the outer diameter of the upper portion of the sleeve 40. In the housing cover 51, bolt insertion holes (not shown) that allow the bolts 2 to pass therethrough are opened in the vertical direction at positions spaced apart by a predetermined interval in the circumferential direction.

  As shown in FIG. 3, the housing 52 has an outer diameter substantially equal to the outer diameter of the housing cover 51, and a substantially cylindrical housing upper part 52 a whose axial direction is the vertical direction, and orthogonal to the vertical direction. A substantially cylindrical housing lower part 52b whose direction is the axial direction is integrally formed.

  As shown in FIG. 3, the housing upper part 52 a is formed in a shape having an inner diameter that can accommodate the sleeve lower part of the sleeve 40 in the vertical direction. Further, a bolt screw hole (not shown) for screwing with the bolt 2 is formed on the upper surface of the housing upper part 52a at a position spaced apart in the circumferential direction.

In the housing lower part 52b, a fluid flow path 53 is formed for flowing a fluid from the left side to the right side in FIG.
More specifically, as shown in FIG. 3, the fluid flow path 53 includes a valve chamber 54 continuous below the internal space of the housing upper portion 52 a, an inflow path 55 provided below the valve chamber 54, and a valve chamber 54. An outflow passage 56 provided on the right side is formed in communication.

  As shown in FIG. 3, the valve chamber 54 is a space that can accommodate the valve bottom portion 32 of the on-off valve 30, and is formed in a substantially circular shape in plan view. Further, a valve seat 54a is formed on the bottom surface of the valve chamber 54 that is vertically opposite to the valve bottom portion 32 of the on-off valve 30, and is recessed downward and in close contact with the valve bottom portion 32.

  Note that the valve chamber 54 has a length in the vertical direction between the lower surface of the valve bottom portion 32 and the valve seat 54 a in the most screwed state with respect to the sleeve 40 when the spindle 20 rotates about 3.5 times. It is formed so as to have a length that is substantially the same as or slightly shorter than the length in the up-down direction of the movement.

As shown in FIG. 3, the inflow passage 55 is formed by communicating a first inflow passage 55a provided below the valve chamber 54 and a second inflow passage 55b provided on the left side of the first inflow passage 55a. ing.
More specifically, as shown in FIG. 3, the first inflow passage 55 a has an inner diameter with which the distal end portion 33 of the on-off valve 30 is fitted, and has a predetermined depth from substantially the center in the plan view of the valve chamber 54 downward. It is recessed.

As shown in FIG. 3, the second inflow passage 55b is formed so as to be inclined obliquely upward from the lower side surface of the first inflow passage 55b toward the center of the left side surface of the housing lower portion 52b.
As shown in FIG. 3, the outflow passage 56 is formed so as to be inclined obliquely downward from the lower side surface of the valve chamber 54 toward the center of the right side surface of the housing lower portion 52 b.

  As shown in FIG. 3, the opening / closing explicit mechanism 60 includes an explicit driving gear 61 that engages with the upper fitting portion 22 of the spindle 20 and rotates synchronously, an explicit small-diameter gear 62 that meshes with the explicit driving gear 61, and an explicit An explicit large-diameter gear (not shown) that meshes with the small-diameter gear 62 and an explicit panel 63 having a gear that meshes with the explicit large-diameter gear on the inner surface.

Although not shown in detail, the explicit small-diameter gear 62 and the explicit large-diameter gear are rotatably supported on the upper surface of the top cover 72 in the opening / closing detection mechanism 70 described later, and the explicit drive gear 61 is rotated as the spindle 20 rotates. It arrange | positions so that it may rotate by rotation.
The gear of the explicit board 63 is arranged so as to rotate coaxially with the explicit drive gear 61 and is arranged so as to be rotated by an explicit large-diameter gear accompanying the rotation of the spindle 20.

That is, the explicit drive gear 61, the explicit small-diameter gear 62, the explicit large-diameter gear, and the gears of the explicit disk portion 63 are in mesh with each other to constitute a planetary gear mechanism. More specifically, the planetary gear mechanism in the opening / closing explicit mechanism 60 has the spindle 20 as an input shaft, the explicit drive gear 61 as a sun gear, the explicit small-diameter gear 62 and the explicit large-diameter gear as planetary gears, and the gears of the explicit disk unit 63. Is an internal gear, and the clarification panel 63 is an output.
The planetary gear mechanism in the opening / closing explicit mechanism 60 is set to a gear ratio in which the explicit disk portion 63 rotates 60 ° in the circumferential direction when the spindle 20 is rotated about 3.5 times.

  As shown in FIG. 3, the display board 63 has a size that is slightly smaller than the tapered portion 13 b and the cylindrical portion 13 c in the handle central portion 13 of the rotary handle 10, and can be accommodated inside the handle central portion 13. It is formed in an inverted cup shape.

  Further, as shown in FIG. 1 and FIG. 2, the taper portion and the cylindrical portion of the display board 63 are engraved with three letters “closed” at intervals of 120 ° in the circumferential direction. The characters “open” (not shown) are engraved at three positions spaced by 60 ° in the circumferential direction.

  As shown in FIGS. 3 to 6, the open / close detection mechanism 70 includes a planetary gear portion 71 having a sun gear 711 that fits with the upper fitting portion 22 of the spindle 20, and a top cover 72 that houses the planetary gear portion 71 therein. The lower case 73 and two limit switches 74 attached to the lower case 73 are configured.

  As shown in FIGS. 3 to 6, the planetary gear unit 71 includes a sun gear (sun gear) 711 that fits the spindle 20 and rotates synchronously, an outer gear (internal gear) 713 that rotates coaxially with the sun gear 711, and a sun gear. 711 and two planetary gears (planetary gears) 712 that mesh with the outer gear 713.

  As shown in FIGS. 5 and 6, the sun gear 711 has a substantially disc-shaped flange portion 711 a having a predetermined thickness in the vertical direction and a spur gear portion 711 b having a smaller diameter than the outer diameter of the flange portion 711 a. Are formed integrally in this order. Further, an opening having a substantially rectangular shape in plan view that fits into the upper fitting portion 22 of the spindle 20 is formed in the sun gear 711 at a substantially center in plan view so as to penetrate in the vertical direction. The spur gear portion 711b is formed with 20 teeth.

  As shown in FIGS. 4 to 6, the two planetary gears 712 are formed so as to be pivotally supported on a shaft portion 731 a of the lower case 73 described later, and are formed as spur gears that mesh with the sun gear 711 and the outer gear 713. . The planetary gear 712 is formed with 20 teeth.

  As shown in FIGS. 4 to 6, the outer gear 713 is a substantially annular shape having a predetermined thickness in the vertical direction and an outer diameter smaller than the inner diameter of the lower case 73, and is an internal gear that meshes with the planetary gear 712. Is formed on the inner peripheral surface. The outer gear 713 is formed with 90 teeth.

  Furthermore, as shown in FIGS. 6 and 7, a recess 713a is formed on the lower surface of the outer gear 713. The recess 713a is recessed upward in the range of about 300 ° in the circumferential direction. The recessed portion 713a is recessed at a height in the vertical direction so as not to contact the tip of the limit switch 74 protruding from the bottom plate portion 731 of the lower case 73. Note that, on the lower surface of the outer gear 713, a range excluding the concave portion 713a is defined as a convex portion 713b.

  As shown in FIG. 3, the top cover 72 is formed so as to fit from above and cover the opening of the lower case 73. More specifically, as shown in FIGS. 4 to 6, the top cover 72 is suspended from the top plate portion 721, the cylindrical housing portion 722 standing on the top surface of the top plate portion 721, and the bottom surface of the top plate portion 721. The cover fitting portion 723 is integrally formed.

  Further, a cover opening 72 a that penetrates and opens through the top plate portion 721 and the cover fitting portion 723 in the vertical direction is formed at the approximate center of the top cover 72 in plan view. The cover opening 72a has a diameter smaller than the outer diameter of the flange portion 711a in the sun gear 711 and a diameter through which the spur gear portion 711b in the sun gear 711 can be inserted (see FIG. 3).

In addition, the top cover 72 has eight screw opening holes 72b into which screws (not shown) for fastening the lower case 73 and the top cover 72 are inserted, and penetrates the top plate portion 721 and the cover fitting portion 723 in the vertical direction. Then, an opening is formed.
As shown in FIGS. 3 and 4, the top plate portion 721 is formed in a substantially disc shape having an outer diameter substantially equal to the outer diameter of the outer cylindrical portion 732 in the lower case 73 described later.

As shown in FIG. 3, the cylindrical housing portion 722 is formed in a substantially cylindrical shape having an inner diameter and a height that can accommodate the explicit driving gear 61 and the explicit small-diameter gear 62 of the opening / closing explicit mechanism 60.
As shown in FIGS. 3 and 6, the cover fitting portion 723 is formed in a substantially disc shape having an outer diameter substantially equal to the inner diameter of the outer cylindrical portion 732 in the lower case 73 described later.

  As shown in FIG. 3, the lower case 73 is attached and fixed to the sleeve 40 and has a shape that allows the planetary gear 712 and the outer gear 713 of the planetary gear unit 71 to be placed. More specifically, as shown in FIGS. 4 to 6, the lower case 73 is provided with a substantially disc-shaped bottom plate portion 731, an outer cylindrical portion 732 standing on the outer edge of the bottom plate portion 731, and a lower surface of the bottom plate portion 731. Two switch mounting portions 734 provided in the inner cylindrical portion 733 and the outer cylindrical portion 732 are integrally formed.

3 and 4, the bottom plate portion 731 is formed with a larger diameter than the housing upper portion 52a of the valve body 50, and a substantially circular case opening into which the spur gear portion 711b of the sun gear 711 can be inserted in the center in the radial direction. A portion 73a is formed. Further, on the upper surface of the bottom plate portion 731, as shown in FIGS. 4 and 5, two shaft portions 731 a that pivotally support the planetary gear 712, and two guide wall portions 731 b that guide the rotation of the outer gear 713 from the inside, Is standing.
In addition, a boss portion 731c for fastening the lower case 73 and the top cover 72 and a switch opening portion 731d (see FIG. 7) communicating with the switch mounting portion 734 are formed in the bottom plate portion 731.

As shown in FIGS. 4 and 5, the shaft portion 731 a is formed at a position facing in the radial direction (from the front to the back) across the case opening 73 a in plan view.
As shown in FIGS. 4 and 5, the guide wall portion 731b is formed at a position facing in the direction substantially orthogonal to the radial direction of the opposed shaft portion 731a in plan view.

As shown in FIGS. 4 and 5, the outer cylindrical portion 732 is formed in a substantially cylindrical shape from the outer edge of the bottom plate portion 731.
As shown in FIGS. 3 and 6, the inner cylindrical portion 733 is formed in a substantially cylindrical shape having an inner diameter substantially equal to the outer diameter of the housing cover 51.

  As shown in FIGS. 4 to 7, the switch mounting portion 734 has a substantially cylindrical shape extending in the vertical direction, and has an interval of about 50 ° in the circumferential direction of the front outer peripheral surface of the outer cylindrical portion 732 in plan view. It is formed in two places apart. As shown in FIG. 7, the switch mounting portion 734 is formed at a position where a substantially semicircular range protrudes radially outward from the outer surface of the outer cylindrical portion 732 in plan view.

  Since the bottom plate portion 731 of the lower case 73 described above is fixed to the valve body 50 and the shaft portion 731a supports the planetary gear 712, the lower case 73 has a role as a planetary carrier that fixes the revolution movement of the planetary gear 712. ing. That is, by the lower case 73 and the planetary gear unit 71, the open / close detection mechanism 70, as shown in FIG. A gear mechanism is configured.

  In the present embodiment, the number of teeth of the sun gear 711, the planetary gear 712, and the outer gear 713 is 20 for the sun gear 711, 35 for the planetary gear 712, and 90 for the outer gear 713. Therefore, since the gear ratio of the planetary gear mechanism is 4.5, the outer gear 713 rotates about 0.8 with respect to the spindle 20 about 3.5 rotations.

  The limit switch 74 is a switch excellent in environmental resistance and mechanical resistance, and has a hemispherical tip as shown in FIG. The limit switch 74 has a built-in microswitch with a normally closed circuit contact specification, and is in an ON state when the tip is not pressed, and the contact of the microswitch is released when the tip is pressed. It is. Of the two limit switches 74, one is a closing limit switch 741, and the other is an opening limit switch 742 (see FIGS. 1, 4, and 7).

  The notification unit 80 has a function of turning on and off the LED lamps 81 and 82 in accordance with the ON state or the OFF state of the limit switch 74. More specifically, as shown in FIG. 1, the notification unit 80 includes a control board (not shown) connected via wire cords 741a and 742a extending from the closing switch 741 and the opening switch 742, and two different emission colors. It consists of two LED lamps 81 and 82 and a built-in power supply (not shown). It should be noted that the characters “Closed” and “Open” are printed below the LED lamps 81 and 82, respectively.

  The LED lamp 81 is turned on / off in response to the ON / OFF state of the closing limit switch 741, and the LED lamp 82 is connected and configured to be turned on / off in response to the ON / OFF state of the opening limit switch 742. ing.

  More specifically, the notification unit 80 forms two independent electric circuits with the closing switch 741 and the opening switch 742. This electric circuit is configured such that when the closing switch 741 is in the ON state, the LED lamp 81 is turned on, and in the OFF state, the LED lamp 81 is turned off and the LED lamp 81 is turned off. Similarly, when the open limit switch 742 is in an ON state, the LED lamp 82 is turned on in a closed circuit, and in the OFF state, the LED lamp 82 is turned off in an open circuit.

The valve device 1 having such a configuration is assembled in the following order.
First, as shown in FIG. 3, the spindle 20 having the opening / closing valve 30 fitted with the seal ring fitted in the lower fitting part 24 is inserted into the sleeve 40 fitted with the O-ring from below. At this time, the spindle 20 or the opening / closing valve 30 is rotated, and the screw thread portion 35 of the opening / closing valve 30 and the screwing portion 41 of the spindle 20 are screwed together, whereby the opening / closing valve 30 is mounted on the spindle 20. .

  Then, the sleeve 20 assembled with the spindle 20 and the on-off valve 30 is inserted into the housing upper portion 52 a of the housing 52. Thereafter, the housing cover 51 is fixed to the housing 52 with the bolt 2, and the spindle 20, the sleeve 40, the on-off valve 30, and the valve body 50 are assembled.

  And although detailed illustration is abbreviate | omitted, the lower case 73 covered from the upper direction with respect to the valve main body 50 is mounted | worn to the sleeve 40 and fixed. Further, as shown in FIG. 1, in the front view, the closing switch 741 is mounted on the right switch mounting portion 734, and the opening switch 742 is mounted on the left switch mounting portion 734 from below and fixed with nuts 741b and 742b. .

  At this time, as shown in FIG. 7, the limit switch 74 is fixed in a state where the tip is slightly protruded from the switch opening 731 d of the bottom plate portion 731 so as not to come into contact with the recess 713 a of the outer gear 713. In addition, the alerting | reporting part 80 is fixed to the front surface of the valve main body 50 by sticking etc. as shown in FIG.

  Then, as shown in FIG. 3, after rotating the spindle 20 until the on-off valve 30 comes into close contact with the valve seat 54 a of the housing 52, the planetary gear 712 and the outer gear 713 are placed on the lower case 73. At this time, as shown in FIG. 7, the outer gear 713 is placed so that the vicinity of the end portion of the convex portion 713 b in the counterclockwise direction L and the opening limit switch 742 are in contact with each other in plan view.

  When the planetary gear 712 and the outer gear 713 are placed on the lower case 73, the top cover 72 is covered from above. Then, the screw inserted through the screw opening hole 72 b of the top cover 72 is screwed into the boss portion 731 c of the lower case 731 c, and the top cover 72 is mounted and fixed to the lower case 73.

  Thereafter, as shown in FIG. 3, the sun gear 711 is fitted to the upper fitting portion 22 of the spindle 20. Further, the sun gear 711 and the planetary gear 712 are engaged with each other and assembled through the case opening 73 a of the top cover 72. At this time, the outer gear 713 and the opening limit switch 742 are assembled so that the positional relationship does not change.

  When the opening / closing detection mechanism 70 is assembled to the valve body 50, the opening / closing detection mechanism 60 is assembled to the opening / closing detection mechanism 70, and then the rotary handle 10 is fitted to the spindle 20. At this time, as shown in FIGS. 1 and 2, the opening and closing of the rotary handle 10 and the “open” marking of the opening and closing plate 63 of the opening and closing mechanism 60 are clearly shown in the circumferential direction. The mechanism 60 and the rotary handle 10 are assembled. Further, after the biasing spring 3 is inserted into the spindle mounting portion 13a, the handle nut 4 is screwed into the nut screwing portion 21 of the spindle 20 to constitute the valve device 1.

Next, in the valve device 1 having such a configuration, an operation when detecting the open / close state of the open / close valve 30 will be described with reference to FIGS.
8 shows a cross-sectional view taken along the line AA in the middle of opening and closing, FIG. 9 shows an explanatory view for explaining the outer gear 713 and the limit switch 74 in the middle of opening and closing, and FIG. 10 shows the A- in the fully opened state. FIG. 11 shows an explanatory view for explaining the outer gear 713 and the limit switch 74 in the fully opened state.

  9A and 11A are plan views of the open / close detection mechanism 70 in which the top cover 72 is not shown, and FIGS. 9B and 11B are the top cover 72 and the lower case 73. FIG. The front view of the opening-and-closing detection mechanism 70 which illustrated by the dashed-two dotted line is shown.

  First, in the fully closed state in which the opening / closing valve 30 is in the fully closed position closing the fluid flow path 53 as shown in FIG. 3, the convex portion 713b of the outer gear 713 in the opening / closing detection mechanism 70 is anti-reverse as shown in FIG. The end limit switch 742 is in contact with the vicinity of the end in the clockwise direction L, but is not in contact with the closing switch 741.

That is, since the opening limit switch 742 is turned off and the closing switch 741 is turned on, the notification unit 80 turns on the “closed” LED lamp 81 and turns on the “open” LED as shown in FIG. The lamp 82 is turned off.
At this time, as shown in FIGS. 1 and 2, in the opening / closing explicit mechanism 60, in the circumferential direction, the explicit opening portion 14 of the rotary handle 10 and the “closed” marking of the explicit board portion 63 coincide with each other.

  Thereafter, when the rotary handle 10 is rotated in the counterclockwise direction L in plan view, the spindle 20 rotates in synchronization with the rotation of the rotary handle 10. As the spindle 20 rotates, the on-off valve 30 moves upward along the threaded portion 41 of the spindle 20 to open the fluid flow path 53.

  At this time, when the spindle 20 is rotated in the counterclockwise direction L, the explicit driving gear 61 of the opening / closing explicit mechanism 60 fitted to the spindle 20 is rotated in the counterclockwise direction L in synchronization with the rotation of the spindle 20 to be explicitly driven. The explicit small-diameter gear 62 meshed with the gear 61 rotates in the clockwise direction R, the explicit large-diameter gear meshed with the explicit small-diameter gear 62 rotates counterclockwise L, and the explicit small-diameter gear meshed with the explicit large-diameter gear. The board portion 63 rotates in the counterclockwise direction L.

  On the other hand, when the spindle 20 rotates in the counterclockwise direction L, the sun gear 711 of the open / close detection mechanism 70 fitted to the spindle 20 rotates in the counterclockwise direction L in synchronization with the rotation of the spindle 20, and meshes with the sun gear 711. The planetary gear 712 rotates in the clockwise direction R, and the outer gear 713 meshed with the planetary gear 712 rotates in the clockwise direction R.

  Here, for example, when the rotary handle 10 is rotated about 1.75, the valve device 1 is in a state in which the on-off valve 30 moves upward and the fluid flow path 53 is opened about half as shown in FIG.

  At this time, although not shown in detail, the indication board portion 63 of the opening / closing indication mechanism 60 rotates 30 ° in the counterclockwise direction L and is marked “closed” through the indication opening 14 of the rotary handle 10. Is not visible.

  On the other hand, as shown in FIG. 9, the outer gear 713 of the open / close detection mechanism 70 rotates about 0.4 in the clockwise direction R so that the closing switch 741, the opening limit switch 742, and the convex portion 713b are not in contact with each other. It becomes a state. That is, since both the opening limit switch 742 and the closing limit switch 741 are turned on, the notification unit 80 lights the “closed” and “open” LED lamps 81 and 82.

  Subsequently, when the rotary handle 10 is rotated counterclockwise in the counterclockwise direction L and is rotated 3.5 times from the fully closed state, the valve device 1 has the valve upper portion of the on-off valve 30 inside the sleeve 40 as shown in FIG. 31 is accommodated. That is, the valve device 1 is in a fully open state where the on-off valve 30 is in a fully open position where the fluid flow path 53 is fully opened.

  At this time, although not shown in detail, the display board portion 63 of the opening / closing explicit mechanism 60 rotates 60 ° in the counterclockwise direction L from the fully closed state and passes through the explicit opening portion 14 of the rotary handle 10. Make the mark “open” visible.

  On the other hand, the outer gear 713 of the open / close detection mechanism 70 stops at a position rotated about 0.8 in the clockwise direction R from the fully closed state, as shown in FIG. The convex portion 713b of the outer gear 713 is in contact with the close switch 741 in the vicinity of the end in the clockwise direction R, but is not in contact with the open switch 742. That is, since the closing switch 741 is turned off and the opening switch 742 is turned on, the notification unit 80 turns off the “closed” LED lamp 81 and turns on the “open” LED lamp 82.

  When the rotary handle 10 is rotated about 3.5 in the clockwise direction R while the fluid flow path 53 is in the fully open state, the on-off valve 30 moves downward and the valve device 1 is fully closed. At this time, in the open / close detection mechanism 70, the outer gear 713 rotates about 0.8 in the direction opposite to the rotation direction described above. Then, the notification unit 80 turns on the LED lamp 81 and turns off the LED lamp 82.

The valve device 1 that realizes the operation as described above and the open / close state detection method of the valve device 1 can stably detect the open / close state of the built-in open / close valve.
Specifically, the planetary gear unit 71 that rotates in conjunction with the rotation of the spindle 20 allows the valve device 1 and the open / closed state detection method of the valve device 1 to be controlled by the limit switch 74 without being affected by the ambient temperature or the like. The ON / OFF state can be switched.

  At this time, the planetary gear unit 71 and the limit switch 74 are arranged so that the limit switch 74 is in an ON state or an OFF state in the fully closed position and / or the fully open position, whereby the valve device 1 and the valve device 1 are arranged. In the open / close state detection method, the open / close state detected by the open / close detection mechanism 70 and the actual open / close state of the open / close valve 30 can be more or less substantially matched even at an ambient temperature at which the spindle 20 is deformed. it can.

  Furthermore, when measuring the load acting on the spindle, the open / closed state is detected electrically. Therefore, depending on the usage environment and aging, maintenance such as inspection and calibration of the semiconductor substrate and strain gauge that measure the load must be performed frequently. There is a risk that stable reliability cannot be ensured.

  On the other hand, the spindle 20 and the planetary gear unit 71 are mechanically interlocked, and the ON / OFF state of the limit switch 74 is mechanically switched by the planetary gear unit 71, whereby the valve device 1 and the valve device 1 are switched. This open / closed state detection method can reduce the frequency of maintenance and improve the reliability of the open / close detection mechanism 70.

  Therefore, the valve device 1 and the open / close state detection method of the valve device 1 are more stable in the open / close state of the built-in open / close valve 30 than when the open / close state of the open / close valve 30 is detected by a load acting on the spindle 20. Thus, the reliability of the open / close detection mechanism 70 can be improved.

  In addition, the convex portion 713b of the outer gear 713 and the open limit switch 742 are in contact with each other in the fully closed position, and the convex portion 713b of the outer gear 713 and the close limit switch 741 in the fully open position are in contact with each other. The open / close valve 30 in the fully closed position can be detected by the open limit switch 742, and the open / close valve 30 in the fully open position can be detected by the close limit switch 741.

  For this reason, for example, in the case of one limit switch 74, only one of the fully closed position and the fully open position can be detected, whereas the valve device 1 makes the open / close state of the open / close valve 30 more stable and It can be detected reliably.

  Further, when the on-off valve 30 is positioned between the fully closed position and the fully open position, the planetary gear unit 71 does not contact the close limit switch 741 and the open limit switch 742. That is, the valve device 1 can detect that the fluid flow path 53 is open so as to be able to flow with the closing switch 741 and the opening switch 742.

  Therefore, the valve device 1 can detect the open / close state of the open / close valve 30 in more detail and stably by switching the ON / OFF state of the closing limit switch 741 or the opening limit switch 742 by the planetary gear unit 71. Can do.

  The planetary gear mechanism having the planetary gear portion 71 constitutes the opening / closing detection mechanism 70, and when the opening / closing valve 30 moves between the fully closed position and the fully opened position of the planetary gear mechanism, the rotation speed of the outer gear 713 is about 0. Because of the gear ratio of 8 turns, the limit is limited by the convex portion 713b of the outer gear 713 while the spindle 20 moves about 3.5 turns, that is, while the on-off valve 30 moves between the fully closed position and the fully open position. It is possible to prevent the ON / OFF state of the switch 74 from being repeatedly switched.

  Specifically, since the spindle 20 rotates about 3.5 while the on-off valve 30 moves between the fully closed position and the fully open position, for example, a substantially disk-shaped rotating body is fitted to the spindle 20. In this case, the ON / OFF state of the limit switch 74 is repeatedly switched in synchronization with the rotation of the spindle 20. For this reason, there is a problem that the limit switch 74 may not only be damaged at an early stage but also it is difficult to check the open / closed state of the on-off valve 30.

  Therefore, by configuring the planetary gear mechanism so that the rotational speed of the outer gear 713 is about 0.8, the valve device 1 can turn on / off the limit switch 74 while the spindle 20 rotates about 3.5 times. The OFF state can be switched only once. Therefore, the valve device 1 can prevent the limit switch 74 from being repeatedly switched between ON and OFF states, and can easily check the open / close state of the open / close valve 30.

  Furthermore, the planetary gear mechanism in the open / close detection mechanism 70 can distribute the load acting on the sun gear 711 by the two planetary gears 712 engaged with the sun gear 711 and transmit the load to the outer gear 713. Therefore, for example, even when the spindle 20 is strongly tightened in the fully closed position or the fully open position, the valve device 1 can distribute the load acting via the spindle 20 by the two planetary gears 712. Can be prevented from being damaged.

In addition, the planetary gear unit 71 enables the valve device 1 to form an open / close detection mechanism 70 that is small and has a large reduction ratio.
Therefore, the valve device 1 includes the planetary gear mechanism having the planetary gear unit 71 to constitute the open / close detection mechanism 70, thereby more reliably detecting the open / close state of the open / close valve 30 and further improving the reliability of the open / close detection mechanism 70. Can be improved.

  In addition, by providing the notification unit 80, the open / close state of the open / close valve 30 detected by the open / close detection mechanism 70 can be visually notified. For this reason, the valve apparatus 1 can make it unnecessary to confirm the open / closed state by operating the rotary handle 10, for example.

Furthermore, the light emission of the LED lamps 81 and 82 having different emission colors enables the bulb device 1 to easily check the open / closed state from a distance or the open / closed state in a dark place.
Therefore, the valve device 1 can make the confirmation of the open / closed state of the on-off valve 30 easier by providing the notification unit 80.

In the above-described embodiment, the valve device 1 is connected between the storage tank and the predetermined device. However, the present invention is not limited to this, and the valve device 1 is directly attached to the storage tank or the predetermined device. Also good.
Further, as a means for switching the ON / OFF state of the limit switch 74, the open / close detection mechanism 70 is provided with the planetary gear unit 71. However, the present invention is not limited to this. May be.

Further, although the planetary gear unit 71 including the two planetary gears 712 is used, the planetary gear unit 71 including one or a plurality of planetary gears 712 is not limited thereto.
Further, although the planetary gear mechanism in which the revolution rotation of the planetary gear 712 is fixed is not limited thereto, the rotation of the sun gear 711 is not limited to this, as long as the rotation speed of the outer gear 713 can be reduced with respect to the rotation speed of the sun gear 711. There may be a configuration in which the planetary gear 712 revolves by following.

  Further, the ON / OFF state of the limit switch 74 is switched by the convex portion 713b of the outer gear 713. However, the present invention is not limited thereto, and the concave switch 713a has a convex shape, the convex portion 713b has a concave shape, and the concave switch has a limit shape. The ON / OFF state may be switched.

  Further, although the limit switch 74 that is turned off by contact with the convex portion 713b of the outer gear 713 is used, the present invention is not limited thereto, and may be a limit switch that is turned on by contacting the convex portion 713b.

Moreover, although the convex part 713b was provided in the lower surface of the outer gear 713, it is not limited to this, You may provide the convex part or recessed part which protruded on the outer peripheral surface of the outer gear 713 to the radial direction outer side. At this time, the limit switch is configured to switch the ON / OFF state when pressed in the radial direction.
Further, although two limit switches 74 have been described, the present invention is not limited to this, and one limit switch 74 may be used.

  In addition, the LED lamps 81 and 82 of the notification unit 80 are configured such that the LED lamp 81 is lit in the fully closed state and the LED lamp 82 is lit in the fully open state. The light emission pattern may have an appropriate configuration. For example, the LED lamp 81 is turned on in the fully closed state, the LED lamp 82 is turned off, the LED lamp 81 and the LED lamp 82 are turned off in the fully opened state, and the LED lamp 81 is turned off between the fully closed state and the fully opened state. The lamp 82 may be turned on.

  Thereby, in the valve device 1 used in the fully opened state, the notification unit 80 can significantly suppress the consumption of the built-in battery due to the LED lamp continuing to be lit in the fully opened state. On the other hand, when the LED lamp 81 is lit in the fully closed state, the bulb device 1 can reliably notify that no harmful gas or the like is circulated in the human body, for example.

  Moreover, although it was set as the alerting | reporting by the two LED lamps 81 and 82 of the alerting | reporting part 80, it is good not only as this but the structure which alert | reports by one LED lamp. For example, the LED lamp of the notification unit 80 may be turned on in the fully closed state, the LED lamp may be turned off in the fully open state, and the LED lamp may blink between the fully closed state and the fully open state. Thereby, in the valve device 1 that is often used in the fully opened state, the notification unit 80 can significantly suppress the consumption of the built-in battery due to the LED lamp continuing to be lit in the fully opened state.

  On the other hand, in the case of the valve device 1 that is often used in the fully closed state, the LED lamp may be turned off in the fully closed state, and the LED lamp may be turned on in the fully opened state. Thereby, the alerting | reporting part 80 can suppress the consumption of a built-in battery significantly similarly to the above.

  In addition, the notification unit 80 is configured to notify by turning on / off the LED lamps 81 and 82, but is not limited thereto, and may be configured to notify by issuing a notification. Alternatively, a communication device may be built in the notification unit 80 and may be notified by light emission, notification, or explicit communication via communication.

  Thereby, for example, when a predetermined fluid harmful to the human body is handled, the valve device 1 may be arranged in an isolated place, but the valve device 1 is opened or closed in the on-off valve 30 by a notification unit via communication. Remote monitoring can be enabled.

  In addition, for example, in the case of a notification unit provided with notification by light emission and notification through communication, the valve device 1 is in an open / closed state of the on-off valve 30 by using a power source used for light emission as a power source for communication. Direct monitoring and remote monitoring can be easily achieved.

  At this time, by using both the power source for light emission and the power source for communication, it is possible to reduce the size of the valve device 1 including a notification unit that notifies through light emission and communication.

In correspondence between the configuration of the present invention and the above-described embodiment,
The predetermined fluid of the present invention corresponds to the fluid such as harmful gas of the embodiment,
Similarly,
The flow path corresponds to the fluid flow path 53,
The detection means corresponds to the open / close detection mechanism 70,
The rotating body corresponds to the planetary gear unit 71,
The detection switch unit corresponds to two limit switches 74,
The switching part corresponds to the convex part 713b,
The first detection switch corresponds to the open limit switch 742,
The second detection switch corresponds to the closing switch 741,
The notification means corresponds to the notification unit 80,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Valve apparatus 20 ... Spindle 30 ... Open / close valve 50 ... Valve body 53 ... Fluid flow path 70 ... Open / close detection mechanism 71 ... Planetary gear part 711 ... Sun gear 712 ... Planetary gear 713 ... Outer gear 713b ... Convex part 74 ... Limit switch 741 ... Close switch 742 ... Open switch 80 ... Notification unit

Claims (5)

A valve body having a flow path through which a predetermined fluid flows;
An on-off valve arranged on the flow path to regulate the flow rate of the predetermined fluid;
A spindle that changes the open / close state by moving the open / close valve to a fully closed position that closes the flow path by receiving a rotation operation and a fully open position that fully opens the flow path;
A valve device comprising detection means for detecting the open / closed state of the open / close valve,
In the detection means,
A rotating body that rotates in conjunction with the rotation of the spindle;
It has a detection switch part that can switch the ON / OFF state,
In the rotating body,
A valve device comprising a switching unit that switches an ON / OFF state of the detection switch unit at the fully closed position or / and the fully opened position. The detection switch unit is composed of a first detection switch and a second detection switch,
The first detection switch;
Arranged at a position facing the switching portion of the rotating body in the fully closed position,
The second detection switch
The valve device according to claim 1, wherein the valve device is disposed at a position facing the switching portion of the rotating body in the fully opened position. The rotating body of the detecting means is
A planetary gear mechanism having a sun gear that is rotationally synchronized with the spindle, an annular outer gear that rotates coaxially with the sun gear, and at least one planetary gear that meshes with the sun gear and the outer gear;
In the outer gear,
Including the switching unit for switching the ON / OFF state of the detection switch;
The planetary gear mechanism,
A configuration in which a rotation ratio of the outer gear rotated by rotation of the sun gear accompanying rotation of the spindle for moving the open / close valve to the fully closed position and the fully open position is less than one rotation. Item 3. The valve device according to item 1 or item 2. 4. The valve device according to claim 1, further comprising a notifying unit that notifies the open / closed state when the detecting unit detects the open / closed state of the open / close valve. A valve body having a flow path through which a predetermined fluid flows; an on-off valve disposed on the flow path to regulate the flow rate of the predetermined fluid; and a fully closed structure that closes the flow path by receiving a rotation operation. An open / closed state detection of a valve device comprising: a spindle that moves the open / close valve to a position and a fully open position that fully opens the flow path to change the open / closed state; and a detecting means that detects the open / closed state of the open / close valve A method,
The rotating body of the detection means rotates in conjunction with the rotation of the spindle,
A valve device that detects the open / closed state of the open / close valve by switching the ON / OFF state of the detection switch unit of the detection means by the switching unit of the rotating body at the fully closed position or / and the fully open position. Open / close state detection method.

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