JP6225816B2 - Valve remote control device - Google Patents

Description

  The present invention relates to a valve remote control device, and relates to a device effective for remote control of an existing valve.

  For example, a tank main valve used in a factory plant needs to be quickly closed in the event of a disaster such as an earthquake or tsunami, in order to maintain the safety of the plant equipment and prevent the outflow of dangerous substances stored in the tank. When the safety of the plant equipment can be confirmed and the operation is resumed, the tank original valve is opened.

  By the way, when a manual valve is provided as a tank original valve, an operator must go to the installation site and manually open and close it. For this reason, depending on the scale and configuration of the plant, manual operation of the tank main valve may not be realistic.

  Therefore, for example, as shown in FIG. 10, it is practical to realize remote operation monitoring by adding an automatic switch 20 using an air motor that uses air pressure as a driving source to an existing manual valve 10. .

  In FIG. 10, the automatic switch 20 includes an air motor 21 that uses air pressure as a drive source, and a control switching valve 22 that switches the rotation direction by switching the air pressure supply circuit that drives the air motor 21. The output shaft 21 a of the air motor 21 is mechanically connected to the manual operation unit 11 of the manual valve 10.

  The automatic switch 20 is connected to an air source 30 and an operation panel 41 constituting an operation system 40 of the automatic switch 20. The air source 30 supplies driving air pressure and control air pressure to the automatic switch 20 and the operation panel 41.

  Further, the automatic switch 20 includes an open-side limit switch that switches when the manual valve 10 reaches the open-side limit position, a closed-side limit switch that switches when the manual valve 10 reaches the close-side limit position, and an air motor by air pressure from the open-side limit switch. An open side switching valve for switching the circuit to the closed side, a closed side switching valve for switching the circuit to the air motor by the air pressure from the closed side limit switch, etc. are provided, but not shown.

  The operation system 40 includes an operation panel 41, an instrument room 42, a control signal line 43 that connects the operation panel 41 and the instrument room 42, and the like.

  In the operation panel 41, an electromagnetic valve for switching the control switching valve 22 of the automatic switch 20 according to an electromagnetic valve opening signal or an electromagnetic valve closing signal input from the instrument chamber 42 and opening / closing an air pressure supplied to the air motor 21; An operation switching valve for switching between an operation at the installation site of the manual valve 10 by a lever operation and a remote operation from the instrument chamber 53a, an opening / closing operation valve for switching an air circuit by a lever operation and opening / closing an air pressure supplied to an air motor, The operating state of the open side shuttle valve that outputs the control air pressure to the open side switching valve of the automatic switch 20, the closed side shuttle valve that outputs the control air pressure to the close side switching valve of the automatic switch 20, and the open limit switch An open display air lamp to display, a closed display air lamp to display the operating state of the closed limit switch, etc. are provided. .

  In such a configuration, the operation switching valve provided in the operation panel 41 is switched to the remote operation from the instrument chamber 42, and the electromagnetic valve opening signal input from the instrument chamber 42 to the operation panel 41 is turned ON. When the electromagnetic valve provided on the operation panel 41 operates to the open side, the drive control air pressure input from the air source 30 to the operation panel 41 passes through the open side shuttle valve and the open side switching valve, and the control switching valve 22. Reach the open side of. As a result, the control switching valve 22 is switched to the open side, and the drive control air pressure input from the air source 30 to the automatic switch 20 is supplied to the open side of the air motor 21, and the air motor 21 starts to rotate to the open side. .

  When the air motor 21 reaches the open limit position and the open limit switch is switched, the air pressure for limit control is transmitted to the open side switching valve, the open side switching valve is switched to the closed side, and the air pressure for drive control is switched to the air motor 21. Will not reach. Thereafter, when the electromagnetic valve open signal input from the instrument chamber 42 to the operation panel 41 is turned OFF at an appropriate timing, the electromagnetic valve returns from the open side to the center position.

  When operating the air motor 21 to the closing side, the electromagnetic valve closing signal input from the instrument chamber 42 to the operation panel 41 is turned ON. Thereby, the circuit on the closed side operates, the air motor 21 starts to rotate toward the closed side, the closed limit switch is switched, and the operation stops.

  However, in the conventional valve remote control device shown in FIG. 10, the control signal line 43 is laid from the instrument chamber 42 to the operation panel 41 provided in the vicinity of the tank main valve 10 as the operation system 40 of the automatic switch 20. When the number of tank main valves 10 to be operated increases, the control signal lines also increase in accordance with the number of tank main valves 10, so that the control signal lines are congested and the control signal lines are maintained. Management man-hours will also increase.

  In order to solve these problems, the applicant, as described in Japanese Patent Application Laid-Open No. H10-260, discloses a valve remote control that can drive and control an air motor that constitutes an automatic switch added to a manual valve with a radio signal. The device has been filed.

  FIG. 11 is a configuration diagram showing a specific example of the valve remote control device described in Patent Document 3, and the same reference numerals are given to portions common to FIG.

  In FIG. 11, the automatic switch 20 added to the existing manual valve 10 is remotely operated by the wireless operation system 50. The wireless operation system 50 includes a contact information terminal 51 that is operated at a location distant from the installation site of the manual valve 10 and the automatic switch 20, and a contact information operation that is provided around the installation site of the manual valve 10 and the automatic switch 20. The unit 52 and the operation valve 53 are configured.

  The contact information terminal unit 51 includes a wireless transmission / reception unit 51a and a contact information input unit 51b, and exchanges operation signals with the contact information operation unit 52 via radio. In addition, the power supply part which drives the contact information terminal part 51 is not illustrated.

  The contact information operation unit 52 includes a wireless transmission / reception unit 52a, a contact information output unit 52b, a contact information conversion unit 52c, and a power supply unit 52d, and wirelessly communicates with the contact information terminal unit 51. The operation valve 53 is driven to open and close based on the received operation signal.

  The operation valve 53 includes an open side solenoid valve 53a and a close side solenoid valve 53b. The air pressure for drive control input from the air source 30 is supplied to the open side of the control switching valve 22 via the open side electromagnetic valve 53a and to the close side of the control switching valve 22 via the close side electromagnetic valve 53b. Supplied.

  In such a configuration, when it is desired to move the air motor 21 to the open side, the contact information input unit 51b of the contact information terminal unit 51 inputs to the contact information operation unit 52, and the contact information output unit 52b inputs to the open side solenoid valve 53a. The contact information for turning on the open side solenoid valve drive signal is transmitted via the wireless transmission / reception unit 51a and the wireless transmission / reception unit 52a.

  When the contact information operation unit 52 provided around the installation site of the manual valve 10 and the automatic switch 20 receives wireless information by the wireless transmission / reception unit 52a, the contact information output unit 52b turns on the open contact information in the wireless information. And the open contact information to be output is turned ON.

  The contact information conversion unit 52c converts the open contact information into an open side solenoid valve drive signal composed of a voltage current (for example, DC 24V / 0.33A) that can drive the open side solenoid valve 53a.

  When the open side solenoid valve 53a is driven by turning on the open side solenoid valve drive signal, the drive control air pressure input from the air source 30 is supplied to the open side of the air motor 21, and the air motor 21 rotates in the open direction. The manual valve 10 in which the manual operation unit 11 is mechanically connected to the output shaft 21a of the air motor 21 opens to the open side.

  In addition, the time until the manual valve 10 is fully opened is grasped in advance, and after that time, the control signal is set so that the open side solenoid valve drive signal is turned off from the contact information input unit 51b of the contact information terminal unit 51. Is transmitted. As a result, the open contact information is turned OFF, and the open side solenoid valve drive signal is also turned OFF, the rotation of the air motor 21 is stopped, and the manual valve 10 is stopped in the open state.

  Also on the closing side, the air contact motor 21 is driven to the closing side by changing the closing contact information and the closing side solenoid valve driving signal in the same procedure, and the manual valve 10 is closed.

Patent Document 1 discloses a technique for performing valve opening / closing control using a radio signal.
Patent Document 2 discloses a technique for remotely controlling a valve actuator laid in a mountainous area using a communication satellite.
Patent Document 3 discloses a technology of a valve remote control device that can drive and control an air motor that constitutes an automatic switch added to a manual valve with a radio signal.

Japanese Patent Laid-Open No. 3-14983 Japanese Patent Application Laid-Open No. 64-46078 JP 2014-1846 A

  FIG. 12 is a configuration diagram showing a part of the components in FIG. 11 at an actual component level. In FIG. 12, as the control switching valve 22, for example, a 5-port 3-position pilot type is used. As the open side solenoid valve 53a and the close side solenoid valve 53b, for example, a 5-port direct acting type that directly drives the valve by excitation of a solenoid coil is used.

  The automatic valve switch 20 is connected to an air motor 21 with a clutch, an inline filter 23 connected to the open side of the air motor 21, an inline filter 24 connected to the closed side of the air motor 21, and the inline filters 23, 24. For example, a 5-port / 3-position / pilot-type control switching valve 22, a silencer 25, 26 attached to a predetermined port of the control switching valve 22 in order to attenuate air sound generated at the port of the control switching valve 22, etc. It consists of

  A port provided at the center of the control switching valve 22 is connected to the air source 30 via the air pipe PP1. The leftmost port is connected to port B of the open side solenoid valve 53a via the air pipe PP2, and the right end port of the control switching valve 22 is connected to port B of the closed side solenoid valve 53b via the air pipe PP3. .

  The port P of the open side solenoid valve 53a is connected to the air source 30 via the air pipe PP4, the branch AS and the air pipe PP6, and the port P of the close side solenoid valve 53b is the air pipe PP5, the branch AS and the air pipe PP6. To the air source 30.

  FIG. 13 is a configuration diagram showing a specific air piping example of the open side solenoid valve 53a and the close side solenoid valve 53b. One end of each of the air pipes PP2 and PP3 is connected to the ports B provided on the upper surfaces of the open side solenoid valve 53a and the close side solenoid valve 53b, and the other ends of the air pipes PP2 and PP3 are connected to the control switching valve 22. It is connected to the ports provided at both ends. One end of the air pipes PP4 and PP5 is connected to the port R2 provided on the lower surface of the open side solenoid valve 53a and the close side solenoid valve 53b, and the other end of the air pipes PP4 and PP5 is connected to the branching device AS. Has been. The branching device AS is connected to the air source 30 via the air pipe PP6.

  However, according to the configuration of FIG. 13, since the open side solenoid valve 53a and the close side solenoid valve 53b must be connected to the air source 30, respectively, a branching device AS for branching the air pressure signal must be provided. However, there is a problem that the air piping becomes complicated.

  The present invention solves these problems, and an object of the present invention is to realize a valve remote control device that can compact the air piping without requiring branching of the pneumatic signal supplied to the solenoid valve. is there.

In order to achieve such an object, the invention described in claim 1 of the present invention is:
In a valve remote control device configured to mechanically connect an output shaft of an air motor using air pressure as a drive source to a manual operation portion of an existing manual valve, and to remotely operate the manual valve,
An air supply solenoid valve and a direction selection solenoid valve operated by an operation signal exchanged wirelessly between the contact information terminal unit and the contact information operation unit are connected in cascade,
Drive control air pressure for rotationally driving the air motor is supplied through the direction selection solenoid valve.

The invention according to claim 2 is the valve remote control device according to claim 1,
The contact information operating unit includes means for amplifying contact information transmitted from the contact information terminal unit into an electrical signal capable of driving the solenoid valve.

The invention according to claim 3 is the valve remote control device according to claim 1 or 2,
The solenoid valve is a double latch type.

  According to the valve remote control device of the present invention, it is not necessary to branch the air pressure signal supplied to the electromagnetic valve, and the air piping can be compactly integrated.

It is a block diagram of one Example of the valve remote control apparatus which concerns on this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the other Example of this invention. It is a structural example figure of the conventional valve remote control apparatus. It is a structural example figure of the conventional valve remote control apparatus. It is the block diagram which showed a part of component of FIG. 11 in the actual component level. It is a block diagram which shows the specific example of air piping of the open side solenoid valve 53a and the close side solenoid valve 53b in FIG.

  FIG. 1 is a block diagram showing an embodiment of a valve remote control device according to the present invention, and the same reference numerals are given to the parts common to FIG. In FIG. 1, the operation valve 53 includes an air supply solenoid valve 53c and a direction selection solenoid valve 53d that are cascade-connected.

  The air pressure for drive control input from the air source 30 is first supplied to the direction selection electromagnetic valve 53d via the air supply electromagnetic valve 53c, and further supplied to the control switching valve 22 via the direction selection electromagnetic valve 53d.

  FIG. 2 is a configuration diagram showing a part of the components in FIG. 1 at an actual component level, and the same reference numerals are given to portions common to FIG. In FIG. 2, as the air supply solenoid valve 53c and the direction selection solenoid valve 53d, as in the open side solenoid valve 53a and the close side solenoid valve 53b, for example, a 5-port direct acting type that directly drives the valve by excitation of a solenoid coil. Use things.

  The leftmost port of the control switching valve 22 is connected to the port A of the direction selection electromagnetic valve 53d via the air pipe PP7, and the rightmost port of the control switching valve 22 is connected to the port B of the direction selection electromagnetic valve 53d via the air pipe PP8. It is connected to the.

  The port P of the direction selection solenoid valve 53d is connected to the port A of the air supply solenoid valve 53c via the air pipe PP9, and the port P of the air supply solenoid valve 53c is connected to the air source 30 via the air pipe PP10. .

  FIG. 3 is a configuration diagram showing a specific air piping example of the air supply solenoid valve 53c and the direction selection solenoid valve 53d. One ends of air pipes PP7 and PP8 are connected to ports B and A provided on the upper surface of the direction selection solenoid valve 53d, and the other ends of the air pipes PP7 and PP8 are provided at both ends of the control switching valve 22. Connected to the port.

  One end of the air pipe PP9 is connected to the port B provided on the upper surface of the air supply electromagnetic valve 53c, and the other end of the air pipe PP9 is connected to a port P (not shown) provided on the lower surface of the direction selection electromagnetic valve 53d. It is connected.

  A port P (not shown) provided on the lower surface of the air supply electromagnetic valve 53c is connected to the air source 30 via the air pipe PP10.

  As can be seen from FIG. 3, the conventional branching device AS provided in FIG. 13 can be dispensed with, and a total of three air pipes PP4 to PP6 connected to the input port and the output port of the branching device AS are connected to two. The number of the air pipes related to the electromagnetic valves 53c and 53d can be reduced in a compact manner.

  FIG. 4 is a block diagram showing another embodiment of the present invention, in which the upper and lower sides of the air supply electromagnetic valve 53c in FIG. 3 are inverted. According to the configuration of FIG. 4, the air pipe is taken out only in one direction on the upper surface, and the air pipe can be easily made compact.

  FIG. 5 is a timing chart showing a specific example of signals in each part of FIG. In FIG. 5, the open contact signal S1 is output from the contact information output unit 52b to the contact information conversion unit 52c, and rises at time t1 and falls at time t2.

  The direction selection valve drive signal S3 is output from the contact information converter 52c to the direction selection electromagnetic valve 53a, and rises at time t3 and falls at time t4.

  The closed contact signal S2 is output from the contact information output unit 52b to the contact information conversion unit 52c in synchronization with the direction selection valve drive signal S3, and rises at time t3 and falls at time t4.

  The air supply valve drive signal S4 is output from the contact information converter 52c to the air supply valve 53b. The air supply valve drive signal S4 rises at time t1 and falls at time t2 in synchronization with the open contact signal S1, and the direction selection valve drive signal S3. In synchronization with the closed contact signal S2, the signal rises at time t3 and falls at time t4.

  In the above embodiment, since the direct acting type is used as the electromagnetic valve 53 for driving the automatic switch 20, the air supply electromagnetic valve drive signal or the direction selection electromagnetic valve drive signal is operated while the air motor 21 is moving. It is necessary to keep the ON state.

  However, these air supply solenoid valve drive signal or direction selection solenoid valve drive signal requires electric power of, for example, 24V * 0.33A≈8 W as described above. In order to keep this during operation of the manual valve 10 (for example, 1 minute or longer for a long time from several seconds), there is a problem in terms of battery life when a battery is used as the power supply unit 52d of the contact information operation unit 52. .

  Such a problem can be solved by changing the direct acting solenoid valve used as the operation valve 53 to a double latch type as shown in FIG. When the double latch type electromagnetic valves 53c and 53d are used as the operation valve 53, a predetermined driving current is allowed to flow only when the state of the electromagnetic valves 53c and 53d is changed. For example, in the case of a 24 V DC type, the state of the solenoid valve can be changed by flowing a current of 0.26 A for 0.5 seconds.

  FIG. 6 is a block diagram showing another embodiment of the present invention, which is an example in which a double latch type electromagnetic valve is used as the operation valve 53, and the same reference numerals are given to portions common to FIG. In FIG. 6, the signal transition detection unit 52e detects a state in which the contact information transitions from ON to OFF or from OFF to ON, and the air supply electromagnetic wave for an arbitrary predetermined time (0.5 seconds in this embodiment) from the transition point. Turn on the valve drive signal or direction selection solenoid valve drive signal.

  FIG. 7 is a block diagram showing a part of the components in FIG. 6 at an actual component level, and the same reference numerals are given to portions common to FIG. In FIG. 7, a 5-port double latch type, for example, is used as the air supply solenoid valve 53c and the direction selection solenoid valve 53d.

  The leftmost port of the control switching valve 22 is connected to the port A of the direction selection electromagnetic valve 53d via the air pipe PP7, and the rightmost port of the control switching valve 22 is connected to the port B of the direction selection electromagnetic valve 53d via the air pipe PP8. It is connected to the.

  The port P of the direction selection solenoid valve 53d is connected to the port A of the air supply solenoid valve 53c via the air pipe PP9, and the port P of the air supply solenoid valve 53c is connected to the air source 30 via the air pipe PP10. .

  FIG. 8 is a timing chart for explaining a specific example of signals in each part of FIG. 7 and shows a case where there is no sequential control. The same reference numerals are given to parts common to FIG. In FIG. 8, when the open contact signal S1 rises at time t1, one direction selection valve drive signal S3 and air supply valve drive signal S4 having a predetermined pulse width rise in synchronization with the rise.

  When the open contact signal S1 falls at time t2, the other air supply valve drive signal S4 having a predetermined pulse width rises in synchronization with the fall.

  When the closed contact signal S2 rises at time t3, one air supply valve drive signal S4 having a predetermined pulse width rises again in synchronization with the rise, and the direction selection valve drive signal S3 having a predetermined pulse width also rises. .

  When the closed contact signal S2 falls at time t4, the other air supply valve drive signal S4 having a predetermined pulse width rises again in synchronization with the fall.

  Thus, when the sequential control is not performed, the air supply solenoid valve 53c and the direction selection solenoid valve 53d are driven simultaneously.

  FIG. 9 is also a timing chart for explaining a specific example of signals in each part of FIG. 7 and shows a case where sequential control is performed. The same reference numerals are given to the parts common to FIG. In FIG. 9, when the open contact signal S1 rises at time t1, one direction selection valve drive signal S3 having a predetermined pulse width rises in synchronization with the rise.

  Thereafter, one air supply valve drive signal S4 rises in synchronization with the fall of the one direction selection valve drive signal S3. That is, one air supply valve drive signal S4 rises after a time delayed by the pulse width of the direction selection valve drive signal S3.

  When the open contact signal S1 falls at time t2, the other air supply valve drive signal S4 having a predetermined pulse width rises in synchronization with the fall.

  When the closed contact signal S2 rises at time t3, the other direction selection valve drive signal S3 having a predetermined pulse width rises in synchronization with the rise.

  Thereafter, one air supply valve drive signal S4 rises again in synchronization with the fall of the other direction selection valve drive signal S3.

  When the closed contact signal S2 falls at time t4, the other air supply valve drive signal S4 having a predetermined pulse width rises again in synchronization with the fall.

  By performing such sequential control, the air supply solenoid valve 53c and the direction selection solenoid valve 53d are driven with a time difference between the pulse widths of the direction selection valve drive signal S3.

  By driving the time difference in this way, it is possible to disperse the power consumption when the air supply solenoid valve 53c and the direction selection solenoid valve 53d are driven by, for example, a battery, so that the battery can be miniaturized and the battery life can be reduced. Can be extended.

  When used in a hazardous area, the contact information terminal unit 51, the contact information operation unit 52, the operation valve 53, and the like are subjected to explosion-proof measures such as pressure-proof explosion-proof / intrinsically safe explosion-proof as necessary.

  Further, in each of the above embodiments, an example in which the wireless transmission unit and the contact information conversion unit are incorporated and integrated in the contact information operation unit 52 is shown. However, the wireless transmission unit and the contact information conversion unit are divided as necessary. May be.

  As described above, according to the valve remote control device of the present invention, it is possible to make the air piping compact without requiring branching of the pneumatic signal supplied to the electromagnetic valve.

10 Manual valve (tank valve)
DESCRIPTION OF SYMBOLS 20 Automatic switch 30 Air source 50 Wireless operation system 51 Contact information terminal part 51a Wireless transmission / reception part 51b Contact information input part 52 Contact information operation part 52a Wireless transmission / reception part 52b Contact information output part 52c Contact information conversion part 52d Power supply part 53 Operation valve 53c Air supply solenoid valve 53d Direction selection solenoid valve

Claims (3)

In a valve remote control device configured to mechanically connect an output shaft of an air motor using air pressure as a drive source to a manual operation portion of an existing manual valve, and to remotely operate the manual valve,
An air supply solenoid valve and a direction selection solenoid valve operated by an operation signal exchanged wirelessly between the contact information terminal unit and the contact information operation unit are connected in cascade,
The valve remote control device according to claim 1, wherein an air pressure for driving control for rotating the air motor is supplied via the direction selection solenoid valve.   2. The valve remote control device according to claim 1, wherein the contact information operation unit has means for amplifying contact information transmitted from the contact information terminal unit into an electric signal capable of driving each electromagnetic valve.   3. The valve remote control device according to claim 1, wherein each of the solenoid valves is a double latch type.