KR100264220B1 - Control system of an actuator for electronic valve - Google Patents

Abstract

PURPOSE: Control system of an actuator is provided to indicate an additional displayer automatic setting state of an offset value and to enable the offset value to be set with only switching action of a corresponding system without opening a dust cap. CONSTITUTION: As an opening position is adjusted to a bottom limit opening position, a sub control processing device of a sub PCB(printed circuit board) outputs control data informing a set start of offset value regarding an initial opening value of the corresponding electronic valve. A PID(proportional integral derivative) controller of a main control processing device rotates a motor(52) then a valve gradually moves to a top limit opening position side from the bottom limit opening position. A voltage signal containing a voltage value varied is fed and proportional differential is performed based on input data according to pressure state of fluid supplied from the main control processing device via a voltage signal from a potentiometer and interfacing action of the sub control processing device for creating set data of offset value regarding an opening value.

Description

Control system of actuator for solenoid valve

The present invention relates to a control system of a solenoid valve actuator, and more particularly, to the initial opening of the solenoid valve in the solenoid valve actuator for electronically controlling the degree of opening of a fluid such as liquid or gas. The present invention relates to a control system of an actuator for a solenoid valve that not only enables to automatically set the offset value of the closed position, but also makes it possible to display the operation state of the solenoid valve.

As is well known, the solenoid valve is opened / closed to measure flow rate, pressure, and temperature by interposing between flows of cold and hot water, steam gas, oil, refrigerant, various chemical fluids, sea water, etc. to control the flow. In the case of two-way valve or three-way valve according to the flow state of the fluid, it is possible to prolong the life of the valve by preventing leakage and reducing the pressure loss. It is designed to be.

In such a solenoid valve, an actuator system for opening and closing the valve according to the rising / falling rotation state of the valve spindle shaft by the rotational motion of the motor to control the opening value of the opening / closing operation for controlling the flow of the desired fluid. The solenoid valve actuator system is configured to be signal-coupled with an actuator control processing apparatus mounted on a separate printed circuit board (PCB) substrate, and has a one-chip microcomputer built-in digital control processing means or personal equipment. From a central control processing system such as a personal computer (PC), measurement values such as flow rate, pressure, and temperature are applied according to each sensing result from various sensing sensors installed on a storage tank or a fluid path of a desired fluid. If the opening control data is transmitted based on the collected measurement value, Receives the opening control data from the processing apparatus side can receive, and to determine the driving amount of the motor opens or closes the valve.

On the other hand, in the case of such an actuator system, in order to accurately set the valve stroke (Valve Stroke) in consideration of the inner diameter of the fluid flow path in which the valve to be controlled is operated, the complete opening position (highest opening position) or the complete closing (lowest opening position) An initial offset value must be set for the operator.In the case of setting an offset value for the initial opening value, the operator opens the dust cap covering the valve actuator system and moves the valve directly from the highest position to the lowest position. By manual operation, the offset value for the opening value of 0 to 100% can be set.

Therefore, in the actuator system, the motor is driven in accordance with the opening control data transmitted from the central control processing system based on the offset value based on the opening value of the valve set initially, so that accurate valve operation that prevents unnecessary leakage of fluid is possible. Done.

However, in order to set the offset value of the initial opening value for the valve-controlled fluid flow passage in the solenoid valve system of the solenoid valve, the operator directly opens the dust cap covering the system and then manually moves the valve to the best opening position. Since the initial value must be fully opened and the valve must be completely closed to the lowest open position by manual operation again, the initial value must be set. There is a problem.

In addition, after a plurality of manual setting of the initial offset value of the solenoid valve, the user can easily determine whether the opening and closing of the solenoid valve is opened and closed in a state of operating the opening and closing of the solenoid valve substantially for flow control of the fluid. Since there is no, there is a problem that can not quickly determine whether the normal operation of the valve.

Accordingly, the present invention has been made in view of the above circumstances, and when the minimum opening position is specified at the time of setting the initial offset value with respect to the opening value of the solenoid valve, it is possible to automatically set the opening point to the best opening position. It is an object of the present invention to provide a control system of an actuator for a solenoid valve, which can display an automatic setting state of an offset value on a separate display unit.

It is another object of the present invention to provide a control system of an actuator for an electromagnetic valve so that the operation of setting the offset value of the initial opening value for the solenoid valve can be performed only by a switch operation installed outside the system without opening the dust cap.

Still another object of the present invention is to detect an overload condition caused by an external force in the operation of the actuator and to temporarily stop the driving of the motor when the valve is operated with the offset value of the initial opening value of the solenoid valve automatically set. It is to provide a control system of the actuator for the solenoid valve.

According to the control system of the solenoid valve actuator according to the present invention in order to achieve the above object, a plurality of fixing having a predetermined length below the seating portion of the disk while being seated on the inside while being able to open and close by a dust cap A rod is mounted on the fixing member to maintain a predetermined distance from the disk, and a linkage for coupling the valve body of the solenoid valve device to the inside thereof is provided on the lower side thereof, and is installed on the disk in the housing, A motor for performing a rotational operation for opening and closing the valve according to a predetermined opening control value, and a gear operation for rotationally coupled on the fixed member under the disk, and for transmitting the rotational force generated from the motor to the valve body side. Gear means for driving through the central portion of the housing and the upper side of the disk; It protrudes through the center hole drilled in the center, and the lower side thereof is engaged with the shaft drawn out from the valve body through the coupling nut, and is engaged with the gear means so as to interlock with the opening state of the valve. The torque from the motor to the gear means by carrying out a clutch operation for returning / releasing the engagement state of the gear means to set the screw shaft flowing to the valve shaft and the initial opening value of the valve body of the solenoid valve device. The gear clutch means for controlling the applied state, and the state in which the gear means is engaged from the motor by the gear clutch means to set the offset value of the initial opening value with respect to the valve element of the solenoid valve device; A number for manually adjusting the valve in the valve body to the lowest opening position by engaging the gear means by a clutch means. Opening position detection coupled to the opening degree adjusting means and the upper side of the screw shaft protruding through the shaft hole of the disk, and detecting the opening position of the valve in the valve body in response to the up / down flow state of the screw shaft. Means, a function input means for performing a function input for starting the offset value setting of the initial opening value for the valve in the valve body, and a setting start state of the offset value for the initial opening value of the valve by the function input of the function input means. Opening from the central control processing system which notifies generating the control data, indicates the state in which the offset value of the initial opening value is set, and adaptively controls the state information of the fluid whose flow is controlled by the solenoid valve device. Sub-control processing means for performing an interface function on the control data, and errors from the sub-control processing means. The control data informing the start of setting of the set value is received to generate setting data for the offset value of the initial opening position based on the detection state of the opening position with respect to the valve body from the opening position detecting means, and the sub-control processing means A control system for an actuator for a solenoid valve is provided, characterized by comprising main control processing means corresponding to the opening degree control data supplied from the central control processing system supplied by the interface function.

1 is a perspective view showing the appearance of the control system of the actuator for the solenoid valve according to the present invention;

Figure 2 is a coupled state showing a state in which the system of the present invention is coupled to the solenoid valve device,

3 is an exploded perspective view showing the overall internal configuration of the control system of the solenoid valve actuator shown in FIG. 1;

4 is a cross-sectional view showing an internal configuration of the control system of the solenoid valve actuator shown in FIG. 3;

Fig. 5 is a block diagram showing the configuration of a main control processing apparatus in charge of main control processing of a control system according to a preferred embodiment of the present invention;

FIG. 6 is a block diagram illustrating a configuration of a sub-control processing apparatus for interfacing with the main control processing apparatus shown in FIG. 4 and confirming an initial offset adjustment and an operation state of an actuator for a solenoid valve according to a preferred embodiment of the present invention. It is a block diagram.

Explanation of symbols on the main parts of the drawings

2: actuator system housing, 4: dust cap,

6, 8: tightening screw, 10: connector cover,

12: display panel, 14a: reset switch,

14b: lock switch, 16: handwheel,

18: linkage, 20: coupling nut,

22: annular frame, 24: position indicator,

26: coupling, 30: valve body,

32a, 32b: fluid flow pipe, 34, 38: coupling ring,

36: shaft, 40: disc,

42: main frame, 44: main PCB board,

48, 50: limit switch, 52: motor,

54: first driving gear, 56: second driving gear,

58: third drive gear, 60: main rotation gear,

62: screw shaft, 68: torque shaft,

72: potentiometer, 80: main control processing unit,

82: power supply unit, 84: PID control unit,

86: memory, 88: motor drive unit,

90: overload detection unit, 92: sub-control processing unit,

94: sub-control part, 96: display drive part.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

That is, Figure 1 is a perspective view showing the appearance of the control system of the solenoid valve actuator according to the present invention, according to the figure two sets of fastening screws (6, 8) on the housing (2) of the actuator system for the solenoid valve The dust cap 4 is installed to be fastened to the housing 2 and coupled to protect the PCB substrate or the apparatus therein.

In addition, one side of the actuator system housing 2 includes a display element such as a liquid crystal element, for example, a display panel 12 for displaying an automatic setting state of an offset value with respect to the initial opening value of the solenoid valve, and an initial state of the solenoid valve. A connector having a reset switch 14a that is keyed to set a work reset state for setting an offset value for an opening value, and a lock switch 14b that performs key operation for resetting an offset value of a preset opening value. The cover 10 is installed.

According to the same figure, the other side of the housing 2 which faces the installation position of the sub-panel 10 is manually rotated to adjust the opening position of which the setting of the offset value with respect to the initial opening value of the solenoid valve is the lowest. A hand wheel (16) is installed, while a linkage (18) coupled to the lower end of the housing (2) to be coupled to the valve body of the solenoid valve is coupled to the coupling drawn out from the housing (2). An annular frame 22 is formed to be coupled to the shaft of the solenoid valve vertically downward from the coupling nut 20 via a nut 20 in the center thereof.

On the other hand, the coupling is drawn out from the housing 2 so that the position indicator 24 is formed so as to be able to visually check the opening value of the solenoid valve from 0 to 100 points along the longitudinal direction inside the linkage 18. It is indicated by a coupling 26 which engages and interlocks with the top of the nut 20.

FIG. 2 is a state diagram showing a state in which the system of the present invention is coupled to the solenoid valve device. According to the figure, the valve body 30 of the solenoid valve is provided with two sets of fluid flow tubes 32a and 32b. In the case of controlling, the vent 30a formed at the upper end of the valve body 30 is fixedly coupled to the annular frame 22 formed at the lower end of the linkage 18 by the coupling ring 34, The shaft 36 of the valve body 30 fitted through the annular frame 22 connects the coupling ring 38 to the coupling nut 20 to receive the rotational force from the motor generated for opening and closing control of the fluid flow. Are fixedly coupled through.

FIG. 3 is an exploded perspective view showing the overall internal configuration of the control system of the solenoid valve actuator shown in FIG. 1. According to the same figure, the dust cap 4 is connected to the housing 2 via a circular cap hub 4a. ) Is fixed to the disk 40 in the housing 2 by the two sets of cap guides 4b and 4c respectively coupled to the two sets of fastening screws 6 and 8.

In addition, a rectangular main frame 42 is fixedly installed in an upright position on one side of an upper end portion of the disk 40 protected by the dust cap 4, and the main frame 42 side is configured to control the opening and closing of the solenoid valve. The main PCB board 44 including the main control processing device 80 for controlling the rotation of the motor 52 is installed. The main PCB board 44 has fastening holes 42d bored in the rectangular corner portions thereof, respectively. Through the coupling holes 42c and the first screw 42a and the second screw 42b respectively drilled in the rectangular corner portion of the main frame 42 are fitted to be coupled to each other.

In addition, according to the same figure, the other side of the main frame 42 is fixed on the panel 46a coupled by the main frame 42, the fastening screw 46b and the nut 46c, and the uppermost of the solenoid valve. The switch member 46 is provided with the 1st limit switch 48 which detects one opening position, and the 2nd limit switch 50 which detects the lowest opening position of the said solenoid valve.

Then, the motor 52 seated on the disk 40 is fixedly coupled by a screw 52b fitted into the slit holes 52a respectively formed on both sides of the lower end thereof, and the rotation shaft 52c of the motor 52 is fixed. ) Is coupled to the gear shaft of the first drive gear 54 through a hole drilled on the disk 40, while the lower end of the first drive gear 54 is provided with a rotary rod 54a of a predetermined length. .

On the other hand, the first drive gear 54 is installed so as to engage with the second drive gear 56, which is rotatably coupled by a hole (56a) and a hole drilled in a predetermined position of the disk 40, The second drive gear 56 has an elastic spring 56d on an axis extending downwardly of the first lower gear 56b while the first lower gear 56b having a smaller gear train is interlockably coupled thereto. The first lower gear 56b is formed to have a length equal to the elastic range of the elastic spring 56d, and is connected to the annular slit 56c formed between the first lower gear 56b and the shaft. The concave-shaped clutch piece 57a is fixedly coupled, and the clutch piece 57a is engaged with the clutch lever 57c provided to protrude outwardly of the housing 2 via the clutch rod 57b.

In addition, the third lower gear 56b coupled to the lower side of the second driving gear 56 is rotatably coupled to the first lower gear 56b through a hole drilled in the disk 40 by a ring 58a. 58, the third drive gear 58 is coupled to the second lower gear (58b) having a smaller gear train on the lower side of the third drive gear (58).

Here, in the preferred embodiment of the present invention, the clutch lever 57c is pulled to set the offset value with respect to the initial opening value of the solenoid valve, and the second drive gear 56 through the clutch rod 57b and the clutch piece 57a. ) Is forcibly pulled downward under the compression operation of the elastic spring 56d to release the rotational force applied from the motor 52 while the engagement state with the first driving gear 54 is released, whereas The engagement state is maintained with the third drive gear 58 so as to be interlocked by the rotation of the handwheel 16 to rotate the third drive gear 58.

At this time, the hand wheel 16 has a handle 16a protruding to one side thereof, and the wheel nut 16d is fixed while the wheel nut 16b and the wheel bolt 16c are fixedly coupled through the wheel hole. The wheel gear 16e is coupled to the clutch lever 57c in a state in which a gear train is formed on the front surface thereof, while the wheel gear 16e is coupled to the wheel gear 16e through the opening 2a of the housing 2. It is to be engaged with the first lower gear 56b of the second drive gear 56, which is forcibly pulled downward.

On the other hand, the second lower gear 58b of the third drive gear 58 is installed to engage with the main rotary gear 60 located in the center with respect to the housing 2, the center of the main rotary gear 60 The screw shaft 62 formed in the longitudinal direction of the gear mountain engaged with the gear train formed at the center of the main rotary gear 60 through the through is installed so that the screw shaft 62 has four ball bearings 63b. Each of them has a support member 63a interposed therebetween so as to support a moving state of the upper and lower sides thereof, and its lower end shaft is engaged with the coupling 26 and at the same time The upper end is allowed to protrude through the shaft hole 66 drilled in the center of the disk 40 via the nut 64.

Here, the screw shaft 62 is rotated by the main rotary gear 60 that is engaged with the third drive gear 58 is rotated to the upper or lower side, the coupling coupled to the upper / lower ( 26) the opening position of the solenoid valve can be indicated, and the first, second and third drive gears 54, 56, 58 are operated by continuous forward or reverse rotation of the motor 52. As the main rotary gear 60 rotates continuously, the gear train formed at the center side of the main rotary gear 60 has the upper end of the screw thread formed along the longitudinal direction of the screw shaft 62 (that is, the best of the solenoid valve). When facing the opening position) or the lower end (that is, the lowest opening position of the solenoid valve), the position of the main rotation gear 60 is moved upward or downward by a predetermined distance by the screw shaft 62.

In addition, the upper limit position weight 68a and the lower limit position weight 68b are inserted at the upper side of the disk 40 at intervals corresponding to the installation positions of the first and second limit switches 48 and 50, respectively. At the same time, an elastic spring 68c is fitted at the upper end thereof, and a lower end of the torque shaft 68 is installed in contact with the upper surface of the main rotary gear 60 through the disk 40, and the torque shaft 68 is provided. The screw shaft 62 is continuously rotated so that the upper end or the lower end of the screw thread formed along the longitudinal direction of the screw shaft 62 faces the main rotary gear 60 so that the main rotary gear 60 is upward or downward a predetermined distance. When it is moved as much as possible, the compression is performed by a distance corresponding to the movement to the upper side or the lower side by the compression of the elastic spring 68c so as to contact the upper limit position 68a or the lower limit position 68b at all times and switch on. "First limit switch 48" It is thereby switching off the second limit switch (50).

In addition, according to the drawing, an annular fixing member 70 having a smaller radius than the radius of the disk 40 is installed in the vertically downward direction of the disk 40 in the housing 2. In order to form a predetermined operating space for the first, second and third drive gears 54, 56 and 58 to be freely geared, three sets of fixing rods 70a are provided on the disk 40. The first rotary hole 70b and the shaft of the second driving gear 56 which are fixedly coupled to each other through the drilled hole and into which the shaft of the first driving gear 54 is fitted on one side of the member are elastic. A second rotating hole 70c fitted through the spring 56d and a third rotating hole 70d into which the shaft of the second driving gear 58 is fitted are formed.

Meanwhile, in the same figure, the upper end of the screw shaft 62 protruding through the shaft hole 66 vented to the center of the disk 40 is variable depending on the movement of the screw shaft 62 above or below. A potentio meter 72 is provided which reads the voltage value changed by the resistance value and generates a voltage signal according to the opening position of the solenoid valve.

In the drawing, the connector panel 10 is coupled with the fastening screw 12c through the fastening holes 12b vented to both sides in a state where the pad 12a is inserted between the housing 2 and the connector. In the panel 10, a switching signal according to the switching operation of the reset switch 14a and the lock switch 14b is applied so that the setting state of the offset value with respect to the initial opening value of the solenoid valve is displayed on the display panel 12. In addition, while the data communication with the main PCB board 44 is wired so that the connector PCB board 74 for interfacing the control data transmitted from the central control processing system consisting of a personal computer or the like to be embedded. On the other hand, at the lower side of the connector panel 10, a connector 76a for enabling wired connection between the central control processing system and the connector PCB board 74 is coupled by a connector ring 76b. The connector coupling ring 76c and the filling member 76d are connected to the data line drawn out from the central control processing system.

FIG. 5 is a block diagram showing the configuration of the main control processing apparatus which is in charge of the main control processing of the control system according to the preferred embodiment of the present invention, which is indicated by the reference numeral 82 in the main control processing apparatus 80 shown in FIG. The specified power supply unit supplies power to the overall starting circuit side of the main control processing apparatus 80.

In addition, the PID control unit designated by 84 is used to control the setting of the offset value with respect to the initial opening value of the solenoid valve, and the central control processing through the sub-control processing unit 92 in the state where the offset value of the opening value is set. The motor 52 is driven to control the opening and closing of the solenoid valve on the basis of the opening degree control data applied from the device side.

Here, the PID controller 84 detects by the potentiometer 72 when a control signal for starting the setting operation of the initial opening value is applied while the reset switch 14a installed in the sub-control processing device 92 is switched. Setting data of the offset value from the lowest opening position to the highest opening position of the solenoid valve in proportional differential operation by receiving a voltage signal varying according to the up / down movement of the screw shaft 62. 52) the motor for the opening value of the solenoid valve corresponding to the opening degree control data applied from the central control processing device via the sub-control processing device 92 via the sub-control processing device 92. (52) By reading the setting data of the rotation from the memory 86, the motor driving unit 88 is driven to control the rotation of the motor 52 for opening and closing the solenoid valve.

In addition, the PID controller 84 receives a switching signal according to whether the first limit switch 48 or the second limit switch 50 is switched "off", and the solenoid valve is at the best opening position or the lowest opening position. In the state of detecting the state reached until, overcurrent is generated from the motor 52 through the overload detection unit 90, if another overload condition is detected, the driving of the motor driving unit 88 is stopped to A control operation is made to stop the rotation.

FIG. 6 is a block diagram illustrating a configuration of a sub-control processing apparatus for interfacing with the main control processing apparatus shown in FIG. 5 and confirming an initial offset adjustment and an operation state of the solenoid valve actuator according to a preferred embodiment of the present invention. As a configuration diagram, the sub-control unit designated by the reference numeral 94 in the sub-control processing unit 92 transmits control data indicating the start or reset state of the offset value with respect to the initial opening value of the solenoid valve. The control unit is configured to display the progressively variable state of the opening position due to the setting operation of the offset value and to perform interface processing on the opening control data received from the central control unit.

Here, the sub-control processing device 92 receives the switching signal according to the switching operation of the reset switch 14a to control data for notifying the start of setting the offset value with respect to the initial opening value of the solenoid valve. The main control processing device 80 transmits control data for transmitting the switching signal to the side of the lock switch 14b to notify the start of the reset function for the offset value of the preset initial opening value. The processing to send to the side is performed.

In addition, the sub-control processing device 92 from the main control processing device 80 to the lowest opening position to the lowest opening position with respect to the offset value of the initial opening value in response to the gradual voltage change of the potentiometer 72. By driving the display driver 96 in response to the setting data, the ratio of the initial opening value converted into, for example, 0 to 100% on the display panel 12 made of, for example, a liquid crystal display element, is arithmetic. To be displayed.

Next, the operation of the present invention made as described above will be described in detail with reference to FIGS. 4 to 6.

First, the coupling nut 20 coupled with the screw shaft 62 in the housing 2 constituting the actuator system of the solenoid valve is operatively coupled to the shaft 36 drawn out from the valve body 30 of the solenoid valve. 2 (refer to FIG. 2), the second driving gear 56 is forcibly pressed while the elastic spring 56d is compressed through the clutch rod 57b and the clutch piece 57a while the clutch lever 57c is pulled out. When pulled downward, the second driving gear 56 is engaged with the first driving gear 54 coupled with the motor 52, and the main driving gear fitted to the screw shaft 62 is released. The third driving gear 58 meshed with the 60 is maintained in a meshed state, and the wheel gear 16c coupled to the hand wheel 16 and the wheel gear 16 are interlockably coupled to each other via the wheel ring 16d. The engagement state is also formed with 16e).

In this state, when the handwheel 16 is rotated to adjust the opening value of the solenoid valve valve 30 to the lowest opening position by manual operation of the operator, the wheel associated with the handwheel 16 is rotated. As the gear 16e rotates and the second driving gear 56 rotates, the third driving gear 58 engaged with the second driving gear 56 also interlocks. Accordingly, as the main shaft gear 60 engaged with the third drive gear 58 is rotated by the rotation driving of the third drive gear 58, the screw shaft 62 is rotated, thereby causing the screw shaft ( The valve in the valve body 30 is adjusted to the lowest opening position while the shaft 36 is moved to the lower limit position through the coupling nut 20 connected downwardly of 62.

Then, when the opening position of the valve in the valve body 30 is adjusted to the lowest position, the reset switch 14a provided on the connector panel 10 is operated to switch to the initial opening value of the solenoid valve. Setting of the offset value is started, and the sub-control processing unit 92 of the sub-PCB board 92 installed in the connector panel 10 switches the reset switch 14a by the sub-control unit 94. As a result of receiving the switching signal according to the present invention, the control data indicating the start of setting of the offset value for the initial opening value of the corresponding solenoid valve is output, and the display driving unit 96 is driven to control the solenoid valve on the display panel 12. In the main control processing device 80 of the main PCB board 44 fixedly installed on the disk 40, for example, a percentage numeral symbol of " 0 " Remind The control data generated from the sub control unit 94 of the sub control processing apparatus 92 is applied to recognize the start state of setting the offset value.

In that state, the PID control unit 84 of the main control processing device 80 rotates the motor 52 by driving control of the motor driving unit 88 in a state where power is supplied by the power supply unit 82, The upper part of the screw shaft 62 which is gradually moved from the lower side to the upper side by the rotation of the motor 52 while the valve in the valve body 30 is gradually moved from the lowest opening position. A voltage signal whose voltage value is changed in accordance with the resistance change is received from the potentiometer 72 coupled to the central control processing through the voltage operation from the potentiometer 72 and the interface operation of the sub-control processing device 92. By performing proportional differentiation based on the pressure data according to the pressure state of the fluid applied from the device, the setting data of the offset values for the variable opening values are generated and stored in the memory 86. Thereby.

In addition, the PID controller 84 applies, to the sub controller 94 of the sub control processor 92, the setting data of the offset value recognizing the opening value setting state of the solenoid valve by the motor 52. The sub-control unit 94 controls the display driver 96 to display the state of movement of the solenoid valve to the upper opening position of the corresponding solenoid valve on the display panel 12 in such a way that a percentage number is increased. do.

On the other hand, when the overcurrent detector generated by the motor 52 is detected by the overload detector 90 while the valve in the valve body 30 reaches the best opening position due to the continuous rotation of the motor 52. The PID controller 84 recognizes the overcurrent detection state from the overload detection unit 90, stops the driving of the motor driving unit 88 to stop the motor 52, and inputs from the potentiometer 72. The voltage signal corresponding to the resistance change at the best opening position is received and stored in the memory 86 as setting data according to the offset value of the best opening position.

At this time, when another solenoid valve device is coupled to the actuator system of the solenoid valve, the motor for the second drive gear 56 is operated by operating the clutch lever 57c similarly to the above-described embodiment. After the power transmission state from 52 is released, and the lock switch 14b is operated by adjusting the lowest opening position of the solenoid valve by the rotation operation of the handwheel 16, the sub-control unit 94 Is applied to the PID control unit 84 of the main control processing device 80 by applying control data informing the start of resetting the offset value with respect to the initial opening value of the preset solenoid valve in accordance with the switching operation of the lock switch 14b. In this way, the initial opening value of the replaced solenoid valve can be reset.

As described above, the initial opening value for the valve in the valve body 30 is set so that the manual operation function by the clutch lever 57c is released to engage the second drive gear 56 with the first drive gear 54. When the opening control data for opening control of the valve is transmitted from the central control processing unit in the state, the sub-control unit 94 of the sub-control processing unit 92 receives the opening control data from the central control processing unit. The main control processing device 80 outputs the main control processing device 80 by an interface operation, and the PID control unit 84 of the main control processing device 80 reads setting data corresponding to the opening control data from the memory 86. The motor 52 is rotated by driving the motor driving unit 88 to rotate the main rotary gear 60 via the first, second and third driving gears 54, 56, 58 and the screw shaft ( 62) by rotating the valve body The valve in 30 is opened or closed by the desired opening value.

In this state, the pressure or temperature of the fluid flowing through the fluid flow pipes extending to both sides of the valve body 30 suddenly changes, so that the opening / closing operation of the valve changes rapidly, and the screw shaft connected to the valve body 30 ( In the case where 62) moves excessively upward, for example, beyond the best opening position, the main rotary gear 60 fitted to the screw shaft 62 is, for example, the upper side of the thread formed along the longitudinal direction of the screw shaft 62. As it faces the end, the position of the main rotary gear 60 is moved upward by a predetermined distance.

Accordingly, the torque shaft 68 in the state of being mounted on the gear body of the main rotary gear 60 is moved upwards, and the upper limit position weight 68a is always flowed as a result of the upper limit position weight 68a. The first limit switch 48 which has maintained the switching " on " state is switched " off ", and the PID control unit 840 of the main control processing device 80 switches the " off " state of the first limit switch 48. As a result, the driving of the motor driving unit 88 is stopped to stop the rotation of the motor 52.

According to the present invention made as described above, in the actuator system of the solenoid valve for opening and closing the fluid flow path according to the supply state of the electrical signal, the setting of the offset value for the initial opening value of the corresponding valve is automatically performed from the lowest opening position. By making it possible to visually identify the setting state of the offset value and the upper and lower limit movement state of the valve, the offset value for the initial opening value of the solenoid valve, even if repeated manual operation is not involved. Not only can be easily set, but also the advantage of being able to easily check the setting state of the initial opening value and the opening control state of the valve.

Claims (3)

The disk 40 can be opened and closed by the dust cap 4 and the disk 40 is fixed by a plurality of fixing rods 70a having a predetermined length below the seating portion of the disk 40. A housing (2) formed with a fixing member (70) maintaining a distance thereon and a linkage (18) formed at a lower side thereof for coupling the valve body (30) of the solenoid valve device to the inside thereof; A motor 52 which is provided on the disk 40 in the housing 2 and performs a rotation operation for opening and closing the valve in the valve body 30 according to a predetermined opening control value; Gear means which is rotatably coupled on the fixing member 70 of the lower side of the disk 40, the gear means for transmitting the rotational force generated from the motor 52 to the valve body 30 side, The valve body 30 penetrates through the central portion in the housing 2 and the upper side thereof protrudes through the shaft hole 66 drilled in the center of the disk 40, and the lower side thereof through the coupling nut 20. A screw shaft 62 which is coupled to the shaft 36 drawn out from and flows up and down in correspondence with the opening state of the valve by being engaged with the gear means and interlocked with each other; In order to set the offset value of the initial opening value with respect to the valve body 30 of the solenoid valve apparatus, clutch operation for returning / releasing the engagement state of the gear means is applied, and rotational force is applied from the motor 52 to the gear means. Gear clutch means for controlling the state, By the gear clutch means, in a state where the engagement state of the gear means is released from the motor 52 by the gear clutch means to set the offset value of the initial opening value with respect to the valve element 30 of the solenoid valve device. Manual opening value adjusting means engaged with the gear means to manually adjust the valve in the valve body 30 to the lowest opening position; Coupling with the upper side of the screw shaft 62 protruding through the shaft hole 66 of the disk 40, and corresponding to the upper / lower flow state of the screw shaft 62 in the valve body 30 An opening position detecting means for detecting the opening position with respect to the valve; Function input means for performing a function input for starting to set an offset value of the initial opening value for the valve in the valve body 30, and for performing a function operation for resetting a preset offset value; Generates control data informing the start state of setting the offset value with respect to the initial opening value of the valve by the function input of the function input means, and displays a state in which the offset value of the initial opening value is set and flows by the solenoid valve device. Sub-control processing means for performing an interface function to the opening degree control data from the central control processing system which adaptively controls the state information of the controlled fluid; The control data informing the start of setting the offset value from the sub-control processing means is applied to the offset value of the initial opening position based on the detection state of the opening position with respect to the valve body 30 from the opening position detection means. A control system for a solenoid valve actuator configured to generate setting data and include main control processing means corresponding to the opening degree control data from the central control processing system supplied by the interface function of the sub-control processing means. . 2. The gear unit of claim 1, wherein the gear means is engaged with the first driving gear 54 and the first driving gear 54 so as to be interlocked with the rotation shaft 52c of the motor 52. The second driving gear 56 having the first lower gear 56b and the first lower gear 56b of the second driving gear 58 are engaged with the second lower gear 58b. The third driving gear 58 and the second lower gear 58b of the third driving gear 58 are engaged with each other, and a thread is formed in the through hole at the center thereof to be engaged with the thread of the screw shaft 62. A main rotary gear 60; The gear clutch means has an elastic spring 56d coupled to an axis extending downward of the first lower gear 56b, and has a concave shape in an annular slit 56c formed between the first lower gear 56b and the shaft. The clutch piece 57a is fixedly engaged, and the clutch piece 57a is engaged with the clutch lever 57c provided to protrude outward from the housing 2 via the clutch rod 57b. Control system of actuator for valve. The upper and upper limits of the first and second limit switches 48 and 50 of claim 1 or 2, which are fixedly provided at predetermined intervals above and below the switch member 46, respectively. The position weight 68a and the lower limit position weight 68b are fitted at intervals corresponding to the installation positions of the first and second limit switches 48 and 50, respectively, and an elastic spring 68c is placed on the upper end thereof. A torque shaft 68 inserted into the lower surface of the main rotary gear 60 and penetrating the disk 40 further includes a torque shaft 68; In the main control processing means, as the torque shaft 68 moves, the upper limit position 68a and the lower limit position 68b are moved by the first limit switch 48 and the second limit as the main gear 60 moves. A control system for an actuator for a solenoid valve, characterized in that the state in which the solenoid valve device exceeds the uppermost opening position or the lowest opening position is sensed by being switched off from the switch (50).

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