WO2012070458A1 - 自動弁用開度検知装置 - Google Patents
自動弁用開度検知装置 Download PDFInfo
- Publication number
- WO2012070458A1 WO2012070458A1 PCT/JP2011/076483 JP2011076483W WO2012070458A1 WO 2012070458 A1 WO2012070458 A1 WO 2012070458A1 JP 2011076483 W JP2011076483 W JP 2011076483W WO 2012070458 A1 WO2012070458 A1 WO 2012070458A1
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- WIPO (PCT)
- Prior art keywords
- valve
- support member
- sensor
- automatic valve
- sensor support
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
- F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
- F16K7/16—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being mechanically actuated, e.g. by screw-spindle or cam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8158—With indicator, register, recorder, alarm or inspection means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8158—With indicator, register, recorder, alarm or inspection means
- Y10T137/8225—Position or extent of motion indicator
- Y10T137/8242—Electrical
Definitions
- the present invention relates to an opening detecting device for an automatic valve that is installed in an automatic valve that opens and closes a fluid passage in a valve body by the movement of a valve rod accompanying the operation of an actuator and detects the opening of the fluid passage.
- Patent Document 1 uses a displacement sensor fixed to a casing of an automatic valve and a tapered cylindrical target integrally attached to the valve stem, and a target that moves with the vertical movement of the valve stem.
- an automatic valve opening detection device that detects the opening of a fluid passage from the measured value of a displacement sensor that faces an inclined detection surface (tapered cylindrical surface).
- the valve stroke continuous monitoring device (referred to in this specification as “automatic valve opening degree detection device”) of Patent Document 1 forms an automatic valve in a dedicated shape, and a displacement sensor and a target are respectively formed on the automatic valve.
- automatic valve opening degree detection device There is a problem that it cannot be applied to existing automatic valves, and there is a problem that it is troublesome to install the opening detection device at the time of piping construction, replacement, maintenance, etc. There was also a problem that it was difficult to ensure detection accuracy.
- An object of the present invention is to provide an opening detecting device for an automatic valve that can easily be incorporated into an automatic valve and ensure the detection accuracy at the time of incorporation and can be easily applied to an existing automatic valve. is there.
- An automatic valve opening degree detection device is an automatic valve opening degree detection device installed in an automatic valve in which a fluid passage in a valve body is opened and closed by the movement of a valve rod accompanying the operation of an actuator.
- a base member that is detachably attached, a displacement sensor that moves together with the valve stem, and a target having an inclined detection surface that is detected by the displacement sensor are provided, and the displacement sensor and the target are supported by the base member. It is characterized by this.
- the sensor positioning surface which receives the lower end of the sensor support member to which the displacement sensor was attached is provided in the valve stem upper end part.
- the upper end of the valve stem is processed to form a flat surface, or the valve stem having a female screw portion extending in the axial direction at the upper end has a flat top surface.
- the male screw member may be screwed in.
- the sensor positioning surface is not limited to a flat surface, and may be any surface as long as it can receive the lower end of the sensor support member.
- the automatic valve is not limited with respect to the configuration except that the upper end of the valve stem protrudes upward from the casing, and is usually provided above the valve body provided with a fluid passage and the valve body.
- a casing, a valve body that opens and closes a fluid passage, a valve rod that moves the valve body in an opening or closing direction by ascending or descending, and an actuator that drives the valve rod are provided.
- An actuator is a driving means that moves the valve stem up and down.
- it uses compressed air (pneumatic actuator), but uses a solenoid (electromagnetic actuator) or other driving means. It may be what you did.
- the inclined detection surface is, for example, a linear inclined surface that is inclined by, for example, about 1 to 10 ° with respect to the axial direction (movement direction) of the valve stem. Any value may be used as long as the value changes, and the value is not limited to a linear inclined surface.
- this opening degree detection device When this opening degree detection device is attached to the automatic valve, the displacement sensor and the target are assembled in advance in the base member and then attached to the automatic valve (the top surface of the casing) in a detachable manner. Can be easily assembled. In addition, since the displacement sensor and the target can be positioned before the assembly work into the automatic valve, it is easy to ensure the detection accuracy during the assembly. In addition, if the valve stem upper end protrudes upward from the casing, the automatic valve opening degree detection device can be installed, so that it can be easily applied to existing automatic valves. .
- the upper end of the valve stem protrudes upward from the casing, and a sensor positioning surface for receiving the lower end of the sensor support member is provided on the upper end of the valve stem. It is preferable that the base member is attached and the base member is detachably attached to the upper end of the valve stem.
- a displacement sensor for example, it has a planar coil, an oscillation circuit, and an integration circuit.
- the oscillation frequency changes according to the change in the distance from the opposing conductor, and this frequency is converted into an integrated value by the integration circuit for digital output.
- the present invention is not limited to this.
- the displacement sensor moves up and down with the movement of the valve stem (up and down movement), so that the distance between the displacement sensor and the inclined detection surface changes, and this is converted into the vertical movement distance of the valve stem.
- the opening degree of the passage can be detected.
- the displacement sensor is preferably supported by the valve stem via a sensor support member, and the sensor support member is preferably supported by the base member through the guide means so as to be movable up and down.
- the guide means has, for example, a guide shaft that is erected on the base member so as to face each other through the sensor support member, and a guide shaft insertion hole that is provided on the sensor support member and is inserted through each guide shaft.
- the sensor support member is guided by the guide shaft and moves integrally with the valve stem.
- position it is preferable to arrange
- the sensor support member moves up and down with respect to the base member, the sensor support member (displacement sensor) can be smoothly moved without being tilted or caught, and has excellent detection accuracy. It becomes.
- the pair of guide shafts are paired, and the respective upper ends thereof are fixed to the connecting member.
- the target is formed in a rectangular plate shape, and the lower ends thereof are inclined with respect to the moving direction of the valve stem.
- the part is attached to the base member, and the upper end part is attached to the connecting member, whereby an inclined detection surface facing the displacement sensor may be formed.
- the target may be a quadrangular columnar body standing on the base member, and the surface facing the displacement sensor may be an inclined surface.
- the mounting position of the upper end of the target to the connecting member and the mounting position of the lower end of the target to the base member are preferably adjustable.
- the target has a rectangular plate-like main body that is long in the vertical direction, and is formed into a cylindrical shape with internal threads formed on the upper and lower ends of the main body with respect to the main body.
- a relatively rotatable vertical rotary shaft is inserted, the base member and the connecting member are each provided with a target storing recess, and the target has its upper end fitted in the target storing recess of the connecting member,
- the adjustment screw is attached to the connecting member, and the adjustment screw is wound with a compression coil spring received by the bottom surface of the target storage recess and the target, and the upper end of the target is attached to the compression coil spring.
- the position of the target can be adjusted by moving it against the force, and the upper end of the target is screwed into the upper rotary shaft by inserting a set screw from a long hole provided in the connecting member. Is secured to the connecting member at a lower end portion of the target is assumed to be fixed to the base member by causing screwed to the lower rotary shaft is inserted through the set screw from the long holes provided in the base member.
- a cylindrical linear bush for guiding the guide shaft is inserted into each guide shaft insertion hole of the sensor support member, and a compression coil spring for biasing the sensor support member downward is fitted over each guide shaft. It is preferable.
- the linear bush is a plurality of outer bushes that are assembled so as to be relatively linearly movable with respect to the guide shaft provided with the raceway groove, and a plurality of raceways provided between the raceway groove of the guide shaft and the raceway groove provided on the outer tube. A smooth relative movement is ensured by rolling a plurality of balls.
- the clearance between the guide shaft and the linear bush is made as small as possible to eliminate backlash between the two, and by using a linear bush in which the ball rolls inside, the relative movement of the sensor support member with respect to the guide shaft is reduced. It will be smooth and smooth. When the compression coil spring presses the linear bush, the entire sensor support member is always urged downward, and play of the sensor support member is also prevented.
- the male screw member is screwed to the sensor support member so that its lower end protrudes downward from the lower surface of the sensor support member, and the lower end of the male screw member is received by the sensor positioning surface at the upper end of the valve stem. In some cases, it can be moved up and down integrally with the valve stem.
- the sensor support member can be positioned with reference to the axis of the male screw member, and the sensor support member can be easily positioned.
- each support column may be provided with a biasing member that applies an elastic force to the sensor support member.
- the accuracy decreases. Since the lower end of the target is attached to the base member and the upper end is attached to the connecting member, a pair of struts that are supported by the base member and support the connecting member are used. By applying an elastic force to the sensor support member by the member, the distance between the target and the displacement sensor is stabilized, and the detection accuracy is further improved.
- the automatic valve opening degree detection device of the present invention is provided with a CPU for executing a predetermined process according to a program, and the CPU and a built-in memory store displacement values from fully open to fully closed, and perform linear correction. Is preferable, and thereby, variations in valves can be absorbed. Moreover, the operation state of a valve can also be visually recognized by attaching an LED indicator light.
- the automatic valve is assumed to be a resin diaphragm, and the change over time of the output signal of the displacement sensor at the fully closed position of the fluid passage is obtained, and when this exceeds a predetermined value, the resin diaphragm is replaced. It is preferable that a valve body replacement time determination means for notifying that the time has come is provided.
- the valve element replacement time determination means is a required program and is installed in the CPU.
- a diaphragm made of resin (for example, PTFE) is usually a two-layer structure with a backup rubber, and is repeatedly opened and closed to change with time (the backup rubber falls), and the sealing performance deteriorates. If you continue to use it, it will be damaged. By detecting the opening, the time-dependent change of the diaphragm (backing rubber back-up) appears as a change in the closed position (the closing position goes down with back-up rubber back-up). Diaphragm replacement can be performed at an appropriate time by automatically diagnosing with the opening degree detection device and issuing an alarm for diaphragm replacement.
- resin for example, PTFE
- up and down means that the side close to the valve body of the valve stem of the automatic valve is up and the opposite side is down, but this up and down is for convenience.
- the automatic valve may be installed upside down, and may be installed not only on a horizontal plane but also on a vertical plane.
- the opening degree detecting device for an automatic valve of the present invention a base member that is detachably attached to the automatic valve, a displacement sensor that moves together with the valve rod, and a target having an inclined detection surface that is detected by the displacement sensor. Since the target is fixed to the base member and the displacement sensor is movably supported by the base member, the displacement sensor and the target may be attached to the base member in advance and then attached to the automatic valve. Assembling work into the automatic valve is easy, and since the displacement sensor and the target can be positioned before assembling work into the automatic valve, it is easy to ensure the detection accuracy at the time of assembling. In addition, if the valve stem upper end protrudes upward from the casing, the automatic valve opening degree detection device can be installed, so that it can be easily applied to existing automatic valves. .
- FIG. 1 is a front sectional view showing an embodiment of a fluid controller provided with an automatic valve opening degree detecting device according to the present invention.
- FIG. 2 is a side cross-sectional view of a first embodiment of the automatic valve opening detection device according to the present invention.
- FIG. 3 is a plan view of the same.
- FIG. 4 is a front sectional view of the same, showing a state when the valve is fully opened.
- FIG. 5 is a view corresponding to FIG. 4 showing a state when the valve is fully closed.
- FIG. 6 is a block diagram showing a control portion of the manual valve opening detection device according to the present invention.
- FIG. 7 is a side sectional view of a second embodiment of the automatic valve opening detection device according to the present invention.
- FIG. 8 is a front sectional view of the same, showing a state when the valve is fully opened.
- FIG. 1 shows a fluid controller having an opening detecting device for an automatic valve according to the present invention.
- the fluid controller (1) includes an automatic valve (2) whose fluid passage is opened and closed by a pneumatic actuator, and an automatic valve. It consists of an automatic valve opening detection device (3) installed at the top of the valve (2).
- the automatic valve (2) includes a valve body (11) provided with a fluid inflow passage (11a) and a fluid outflow passage (11b), and a casing attached via a bonnet (12) above the valve body (11). (13), a valve rod (14) disposed in the bonnet (12) and the casing (13) so as to be vertically movable, and a boundary portion between the fluid inflow passage (11a) and the fluid outflow passage (11b).
- the configuration of the automatic valve (2) is a known one, and a pneumatic actuator is configured by the piston (18), the operation air introduction chamber (20), and the like.
- the diaphragm (16) is made of resin (for example, made of PTFE) and has a two-layer structure with a backup rubber on the side in contact with the compressor (17).
- valve (2) in the state shown in FIG. 1 where compressed air is not introduced into the operating air introduction chamber (20), the valve rod (14) is urged by the compression coil spring (19).
- the fluid passage (11a) (11b) is closed by the diaphragm (16) coming into contact with the valve seat (15), and compressed air is introduced into the operation air introduction chamber (20). Then, an upward force acts on the piston (18), and the valve rod (14) moves upward, so that the fluid passages (11a) and (11b) are opened.
- the opening detection device (3) is a device that digitizes the opening of the fluid passage (11a) (11b) of the automatic valve (2) and takes it out.
- the base plate (base member) (4) and the base plate (4) A displacement sensor (5) supported in a vertically movable manner, a target (6) fixed in an inclined state to the base member (4) so as to face the displacement sensor (5), and a cap (7) covering these And.
- the displacement sensor (5) and the target (6) are both held by the base plate (4), and this base plate (4) is detachably attached to the top wall of the casing (13) of the automatic valve (2). Yes.
- On the top wall of the cap (7) On the top wall of the cap (7), a blue LED indicator lamp (8) indicating the open / closed state of the fluid passages (11a) (11b) and a red LED indicator lamp (9) indicating abnormality are attached.
- the displacement sensor (5) is, for example, a non-contact magnetic sensor, and the displacement sensor (5) moves up and down as the valve stem (14) moves up and down, so that the displacement sensor (5) and the target (6)
- the distance to the detection surface (6a) changes, and the opening of the fluid passages (11a) and (11b) can be detected by converting this distance into the vertical movement distance of the valve rod (14).
- FIG. 2 is left and right
- FIG. 4 is front
- FIG. 4 is an enlarged cross-sectional view of the opening degree detection device (3) of FIG. 1
- FIG. 2 is a cross-sectional view in a direction orthogonal to FIG. 4
- FIG. 3 is a plan view corresponding to FIG.
- FIG. 5 is a cross-sectional view showing a state in which the fluid passage is closed while FIG. 4 shows a state in which the fluid passage is open.
- the opening detection device (3) has a through hole (4a) for inserting the upper end of the valve rod (14) in the center and is detachably attached to the top surface of the casing (13) of the automatic valve (2).
- a cylindrical cap (7) having a top wall provided with an LED indicator (9) and fixed to a base
- the left and right edges of the base plate (4) are sized to be exposed from the lower end of the peripheral wall of the cap (7), and the upper plate (24) is sized to be accommodated in the cap (7).
- the upper end of the valve stem (14) protrudes upward from the casing (13) of the automatic valve (2), and a male screw member (25) having a flat top surface (25a) is screwed together.
- the top surface (25a) is a sensor positioning surface that receives the lower end of the sensor support member (21).
- the sensor support member (21) has a substantially rectangular parallelepiped shape that is long on the left and right, and the displacement sensor (5) is disposed at the center on the left and right (length direction).
- a male screw member (31) is screwed to the center portion of the sensor support member (21) so that the lower end portion protrudes from the lower surface of the sensor support member (21).
- a pair of male screw members (31) (the portion where the displacement sensor (5) is disposed) are sandwiched between the left and right sides of the sensor support member (21) so as to penetrate the sensor support member (21) in the vertical direction.
- a guide shaft insertion hole (21a) is provided.
- the sensor support member (21) can be moved up and down integrally with the valve stem (14) by the lower end of the male screw member (31) being received by the flat top surface (25a) of the upper end of the valve stem (14). ing.
- the guide means (22) includes a pair of guide shafts (32) secured between the base plate (4) and the upper plate (24) so as to be opposed to the left and right via the sensor support member (21). It is formed by the pair of guide shaft insertion holes (21a) provided in the sensor support member (21). Each guide shaft (32) extends vertically so as to be perpendicular to the base plate (4) and the upper plate (24), and is inserted into each guide shaft insertion hole (21a).
- the base plate (4) is fitted in a recess provided on the upper surface.
- the upper end of each guide shaft (32) is fitted into a recess provided in the lower surface of the upper plate (24), and the upper plate (24) is connected to the upper end of the pair of guide shafts (32). It has the function of the connecting member which connects.
- the pair of guide shafts (32) are erected on the base plate (4), and the sensor support member (21) is guided by the pair of guide shafts (32) to move up and down integrally with the valve stem (14). It is made to do. This ensures that the sensor support member (21) and the displacement sensor (5) move smoothly without tilting or catching when the sensor support member (21) moves up and down relative to the base plate (4). Has been.
- a cylindrical linear bush (33) for guiding the guide shaft (32) is inserted into each guide shaft insertion hole (21a) of the sensor support member (21), and the compression coil spring (34) is connected to each guide shaft ( 32), the upper end thereof is received by the lower surface of the upper plate (24), and the lower end thereof is received by the upper surface of the linear bush (33).
- a pair of left and right support columns (23) are provided on the front portion of the base plate (4) so as to face the target (6) via the sensor support member (21).
- the column (23) is vertical, and the male screw provided at its lower end is provided on the upper surface of the base plate (4), so it is screwed to the screw, and its upper end is bolted to the upper plate (24) ( 35)
- the upper plate (24) is supported by being fixed by (refer FIG. 3).
- the target (6) has a rectangular plate-like main body (41) that is long in the vertical direction, and a rotating shaft insertion hole is provided in the upper and lower ends of the main body (41) in the left-right direction (width direction).
- the vertical rotation shafts (42) and (43) that can rotate relative to the main body (41) are inserted into the respective rotation shaft insertion holes.
- Each of the vertical rotation shafts (42) and (43) has a cylindrical shape in which a female screw is formed on the inner periphery.
- a target storage recess (36) that opens rearward. Also in the central part of the rear part of the base plate (4), there is provided a target storage recess (37) that opens rearward.
- An adjustment screw insertion hole that penetrates the upper end of the main body (41) of the target (6) in the left-right direction and the center of the upper rotation shaft (42) in the front-rear direction is provided in the upper plate (24 )
- the upper end of the target (6) is the target of the upper plate (24). It is fitted in the storage recess (36) and is attached to the upper plate (24) by an adjustment screw (38) in the front-rear direction.
- the adjustment screw (38) is wound with a compression coil spring (39) received by the bottom surface of the target storage recess (36) and the front surface of the target (6), and the upper end of the target (6).
- the position in the front-rear direction can be adjusted by moving it in the front-rear direction against the urging force of the compression coil spring (39).
- the lower end of the target (6) is fitted into the target storage recess (37) of the base plate (4).
- the upper end of the target (6) is rotated upward by inserting a set screw (46) through a long slot (44) before and after extending from the left and right sides of the upper plate (24) to the left and right sides of the target storage recess (36). It is fixed to the upper plate (24) by screwing it onto the shaft (42), and the lower end of the target (6) is long before and after extending from the left and right sides of the base plate (4) to the left and right sides of the target storage recess (37).
- the set screw (47) is inserted through the long hole (45) and screwed to the lower rotary shaft (43) to be fixed to the base plate (4).
- the front and rear positions of the upper end and lower end of the target (6) can be adjusted, Thereby, the inclination angle of the detection surface (6a) of the target (6) can be adjusted, and the detection surface (6a) of the displacement sensor (5) and the target (6) when the sensor support member (21) moves up and down. Can be prevented from interfering with each other.
- the lower end of the target (6) is attached to the base plate (4) and the upper end of the target (6) is attached to the upper plate (24) so as to be inclined with respect to the moving direction of the valve stem (14).
- the inclined detection surface (6a) facing the displacement sensor (5) is formed on the target (6) without separately processing the detection surface (6a).
- the opening degree detection device (3) further includes a substrate (CPU) (51) for performing data processing.
- the substrate (51) is supplied with a 24V DC power supply.
- a power supply circuit and a control circuit for processing the measurement value of the displacement sensor (5) are incorporated.
- the control circuit executes predetermined processing according to the built-in program, outputs the vertical movement amount (stroke) of the valve stem (14) as an analog signal, and outputs the detection results of the fully open position and the fully closed position. Output.
- the displacement sensor (5) moves up and down relative to the target (6) fixed to the base plate (4), so that the target ( The distance between 6) and the detection surface (6a) changes, and the change in this distance is measured by the displacement sensor (5). Therefore, by converting the measured value of the displacement sensor (5) into the amount of movement of the valve stem (12) using the angle of the detection surface (6a), the amount of vertical movement of the valve stem (14) (fluid passage (11a ) (The opening degree of (11b)) can be detected continuously.
- the opening degree detecting device (3) is provided with a manual switch (52) for setting the fully closed position and the fully opened position, and the opening degree detecting device for the opening degree of the fluid passages (11a) and (11b).
- a manual switch (52) for setting the fully closed position and the fully opened position
- the opening degree detecting device for the opening degree of the fluid passages (11a) and (11b).
- the opening detection device (3) lights up the blue LED indicator (8) indicating that it is fully closed or fully open during normal operation, and outputs an alarm output and outputs a red LED indicator (9 ) Is lit.
- the control circuit obtains the change over time of the output signal of the displacement sensor (5) at the fully closed position of the fluid passage (11a) (11b), and when this exceeds a predetermined value, the replacement timing of the resin diaphragm (16)
- a program (valve element replacement timing determination means) for notifying that the air has come is incorporated, and the opening of the fluid passages (11a) and (11b) is determined.
- the resin diaphragm (16) changes over time (back-up rubber falls) due to repeated opening and closing operations, and the sealing performance deteriorates. Furthermore, it will be damaged if used continuously. .
- the change over time of the diaphragm (16) (backing rubber sag) appears as a change in the closed position (closed position is lowered with the back-up rubber sag).
- Diaphragm (16) replacement alarm can be performed at an appropriate timing by automatically diagnosing and issuing a diaphragm (16) replacement alarm.
- the life of the diaphragm (16) varies depending on the process conditions (temperature, pressure, opening / closing speed, opening / closing frequency), so it is difficult to predict the life of the diaphragm (16). ) Has been replaced, even if it can be used, it may be replaced, or the replacement may be delayed and the diaphragm (16) may be damaged. By exchanging the diaphragm (16), it is possible to exchange without waste before the diaphragm (16) is damaged.
- the opening detection device (3) is assembled in advance, and after the screw member (25) is screwed onto the upper end of the valve stem (14) of the automatic valve (2), the bolt provided on the base plate (4)
- the screw hole provided in the insertion hole (48) and the casing (13) is used to detachably attach the casing (13) with a bolt.
- the guide shaft insertion recesses provided on the base plate (4) are provided at the lower ends of the pair of guide shafts (32) for guiding the sensor support member (21).
- the male screw part provided at the lower end of the pair of support posts (23) is screwed into the screw part provided on the base plate (4), and then the displacement sensor (5) is attached.
- the sensor support member (21) is fitted to the pair of guide shafts (32), the linear bush (33) and the compression coil spring (34) are arranged, and then the upper plate (24) is attached to the pair of columns (23).
- FIG. 7 and 8 show a second embodiment of the automatic valve opening degree detection device (3) according to the present invention.
- the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- each strut (23) is provided with an L-shaped leaf spring (biasing member) (50) for applying an elastic force to the sensor support member (21).
- Each leaf spring (50) has a horizontal portion (50a) sandwiched between the upper end surface of the support post (23) and the lower surface of the upper plate (24), and a portion (50b) bent with respect to the horizontal portion (50a). It extends downward between the column (23) and the sensor support member (21).
- the leaf spring (50) In the free state, the leaf spring (50) is in an inclined state where the lower end is positioned on the sensor support member (21) side with respect to the vertical, and comes into contact with the sensor support member (21), so that the sensor support member (21 ) Is given an elastic force.
- the sensor support member (21) is a movable member that moves integrally with the valve stem (14), and the base plate (4), the target (6), the column (23), and the upper plate (24) are It is a fixed member.
- the sensor support member (21) moves, there is a possibility that the position of the displacement sensor (5) with respect to the target (6) may change due to rattling of the screwed portion. ).
- the distance between the target (6) and the displacement sensor (5) is stabilized, and the detection accuracy is further improved.
- the automatic valve opening degree detection device (3) according to the present invention has a valve body replacement time determination means for notifying that the replacement time of the resin diaphragm (16) has come, so that Although it is particularly suitable for the automatic valve (2) having the diaphragm (16), the valve body replacement timing determination means is additional, and the automatic valve opening degree detection device (3) according to the present invention is a metal
- the present invention can also be suitably used for an automatic valve having a manufactured diaphragm and other various types of automatic valves.
- the opening detecting device for an automatic valve according to the present invention is suitable for being installed in an automatic valve in order to detect the opening of a fluid passage. According to the present invention, an automatic valve opening degree detection device can be obtained which can easily be incorporated into an automatic valve and ensure the detection accuracy at the time of incorporation and can be easily applied to an existing automatic valve.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
Description
(3) 自動弁用開度検知装置
(4) ベースプレート(ベース部材)
(5) 変位センサ
(6) ターゲット
(6a) 検知面
(11) 弁本体
(11a) 流体流入通路
(11b) 流体流出通路
(13) ケーシング
(14) 弁棒
(16) ダイヤフラム
(21) センサ支持部材
(21a) 案内軸挿通孔
(22) 案内手段
(23) 支柱
(24) アッパプレート(連結部材)
(25a) 頂面(センサ位置決め面)
(31) おねじ部材
(32) 案内軸
(33) リニアブッシュ
(34) 圧縮コイルばね
(50) 板ばね(付勢部材)
Claims (8)
- アクチュエータの作動に伴う弁棒(14)の移動により弁本体(11)内の流体通路(11a)(11b)が開閉される自動弁(2)に設置される自動弁用開度検知装置(3)において、
自動弁(2)に着脱可能に取り付けられるベース部材(4)と、弁棒(14)とともに移動する変位センサ(5)と、変位センサ(5)によって検出される傾斜状の検知面(6a)を有するターゲット(6)とを備えており、ターゲット(6)がベース部材(4)に固定され、変位センサ(5)が移動可能にベース部材(4)に支持されていることを特徴とする自動弁用開度検知装置。 - 変位センサ(5)は、センサ支持部材(21)を介して弁棒(14)に支持され、センサ支持部材(21)は、案内手段(22)を介してベース部材(4)に支持されており、案内手段(22)は、ベース部材(4)に立設された案内軸(32)と、センサ支持部材(21)に設けられて案内軸(32)に挿通される案内軸挿通孔(21a)とを有しており、センサ支持部材(21)が案内軸(32)に案内されて弁棒(14)と一体で移動するようになされていることを特徴とする請求項1の自動弁用開度検知装置。
- 自動弁(2)は、弁棒(14)上端部がケーシング(13)よりも上方に突出しているものとされて、弁棒(14)上端部に、センサ支持部材(21)の下端を受けるセンサ位置決め面(25a)が設けられており、センサ支持部材(21)およびターゲット(6)がベース部材(4)に取り付けられ、ベース部材(4)が弁棒(14)上端部に着脱可能に取り付けられている請求項2の自動弁用開度検知装置。
- 案内軸(32)が1対とされて、その各上端部が連結部材(24)に固定されており、ターゲット(6)は、長方形の板状とされて、弁棒(14)の移動方向に対して傾斜するように、その下端部がベース部材(4)に、上端部が連結部材(24)に取り付けられ、これにより、変位センサ(5)に対向する傾斜状の検知面(6a)が形成されている請求項2または3の自動弁用開度検知装置。
- センサ支持部材(21)の案内軸挿通孔(21a)に、案内軸(32)を案内する円筒状リニアブッシュ(33)が挿入されており、センサ支持部材(21)を下方に付勢する圧縮コイルばね(34)が案内軸(32)に嵌め被せられていることを特徴とする請求項2から4までのいずれかに記載の自動弁用開度検知装置。
- センサ支持部材(21)に、おねじ部材(31)がその下端部をセンサ支持部材(21)の下面から下方に突出するようにねじ合わされており、おねじ部材(31)は、下端部が弁棒(14)上端のセンサ位置決め面(25a)で受けられることで、弁棒(14)と一体で上下移動可能とされている請求項3から5までのいずれかに記載の自動弁用開度検知装置。
- ベース部材(4)に支持されて連結部材(24)を支持する1対の支柱(23)が設けられており、各支柱(23)に、センサ支持部材(21)に弾性力を作用させる付勢部材(50)が設けられていることを特徴とする請求項4から6までのいずれかに記載の自動弁用開度検知装置。
- 自動弁が樹脂製のダイヤフラムを弁体とするものとされ、流体通路の全閉位置における変位センサの出力信号の経時変化を求めて、これが所定値を超えた時に樹脂製のダイヤフラムの交換時期が来たことを知らせる弁体交換時期判定手段が設けられていることを特徴とする請求項1から7までのいずれかに記載の自動弁用開度検知装置。
Priority Applications (4)
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JP2012545704A JP5921441B2 (ja) | 2010-11-25 | 2011-11-17 | 自動弁用開度検知装置 |
CN201180056858.4A CN103403426B (zh) | 2010-11-25 | 2011-11-17 | 自动阀用开度检测装置 |
KR1020137015965A KR101474676B1 (ko) | 2010-11-25 | 2011-11-17 | 자동 밸브용 개방도 검지 장치 |
US13/988,836 US9038663B2 (en) | 2010-11-25 | 2011-11-17 | Opening degree detection device for automatically operated valve |
Applications Claiming Priority (2)
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JP2010-262676 | 2010-11-25 | ||
JP2010262676 | 2010-11-25 |
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Country Status (6)
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US (1) | US9038663B2 (ja) |
JP (1) | JP5921441B2 (ja) |
KR (1) | KR101474676B1 (ja) |
CN (1) | CN103403426B (ja) |
TW (1) | TWI548826B (ja) |
WO (1) | WO2012070458A1 (ja) |
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JPWO2018079173A1 (ja) * | 2016-10-28 | 2019-09-12 | 株式会社堀場エステック | 流体制御弁用診断装置、流体制御装置、及び流体制御弁用診断プログラム |
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Also Published As
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KR101474676B1 (ko) | 2014-12-17 |
CN103403426B (zh) | 2015-04-15 |
KR20130112050A (ko) | 2013-10-11 |
CN103403426A (zh) | 2013-11-20 |
US20130319551A1 (en) | 2013-12-05 |
JPWO2012070458A1 (ja) | 2014-05-19 |
US9038663B2 (en) | 2015-05-26 |
JP5921441B2 (ja) | 2016-05-24 |
TW201233926A (en) | 2012-08-16 |
TWI548826B (zh) | 2016-09-11 |
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