JP2019094926A - Control valve device - Google Patents

Abstract

To provide a control valve device capable of easily attaining pressure regulation control or constant flow control for a secondary side, and capable of accurately determining and monitoring an internal state such as an open/closed state of a valve body.SOLUTION: A control valve device 10 comprises: an opening sensor 46 for detecting opening of a valve body 24 opened/closed by a drive mechanism; a primary side pressure sensor 48 and a secondary side pressure sensor 50 for detecting primary side pressure and secondary side pressure of the valve body 24; and a control unit for acquiring an amount of water flowing from a primary side to a secondary side on the basis of a volumetric coefficient (Cv value) corresponding to valve opening detected by the opening sensor 46 and pressure difference, to perform constant flow control.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control valve device provided in fire extinguishing equipment such as sprinkler equipment and plant equipment.

  Conventionally, in a sprinkler facility, a foam fire extinguishing facility, and a water spray facility, a control valve device for controlling the pressure on the secondary side is provided in the middle of a pipe for supplying pressurized water from a pressurized water supply device to a head.

  In the sprinkler installation etc. which are installed in a high-rise building, the discharge pressure of the sprinkler head may exceed the specified upper limit in the lower floor near the pressurized water supply device. In such a part, a control valve device for performing pressure reduction control is provided at the front stage of the water flow detection device.

  FIG. 11 is an explanatory view showing a conventional control valve device performing secondary side pressure regulation having a water flow detection function.

  As shown in FIG. 11, the control valve device 210 connects the primary side piping 218 to the lower side of the valve body 212 via the gate valve 216, and connects the secondary side piping 222 to the upper side of the valve body 212, A sprinkler head is connected to the end of the secondary pipe 222.

  In the normal monitoring state, the valve body 224 of the control valve device 210 is in the closed state, and the pressure of the secondary side pipe 222 is a predetermined cutoff set pressure P2 lower than the pressure P1 of the primary side pipe 218. If the secondary pressure falls below the shutoff setting pressure P2 due to water leakage on the secondary piping 222 side in the normal monitoring state, the inoperable flow amount valve portion 252 of the pilot control valve 250 which has been in the closed state so far opens. Through the non-operation flow amount valve portion 252 opened from the bypass piping 248, supply the flow water of a constant non-operation flow amount determined by the constant flow rate valve 258 to the secondary side, and cut off the lowered secondary pressure Recover to P2.

  When the sprinkler head is activated and a flow of water exceeding a certain amount is generated in the secondary side pipe 222 due to a fire etc., the secondary side pressure rapidly drops from the cutoff set pressure P2, and the inoperative flow rate valve portion 252 opens first. Although primary side pressure water is supplied to the secondary side by the bypass piping 248, the secondary side pressure is not recovered by this, and falls below the pressure adjustment pilot set pressure P3 set at a position lower than the shutoff set pressure P2 by a predetermined value. The pressure control by opening the valve body 224 is started.

  Here, the pressure control pilot valve portion 254 communicates the primary side of the bypass pipe 248 to the cylinder chamber 230 and simultaneously disconnects the secondary side bypass pipe until the secondary side pressure decreases to the pressure control pilot set pressure P3. Therefore, the pressure water on the primary side is supplied to the cylinder chamber 230 through the pressure adjustment pilot valve portion 254, and the valve body 224 is closed by the pressure of the piston 228.

  In this state, when the secondary pressure drops and becomes equal to or lower than the pressure adjustment pilot set pressure P3, the pressure adjustment pilot valve portion 254 makes the cylinder chamber 230 communicate with the secondary side and simultaneously switches the primary side from the cylinder chamber 230 As a result, pressurized water in the cylinder chamber 230 flows out to the secondary side through the pressure control pilot valve portion 254, whereby the pressure in the cylinder chamber 230 decreases, and the valve body 224 is opened.

  When the valve body 224 opens, the primary side pressurized water is supplied to the secondary side to recover the secondary side pressure, and when the secondary side pressure exceeds the pressure adjustment pilot set pressure P3, the valve body 224 is again closed. Thereafter, the primary side pressure water is continuously supplied to the secondary side so as to maintain the pressure control pilot set pressure P3 while repeatedly opening and closing the valve body 224.

  The pressure switch 240 functions as a water flow detection unit, and when the valve body 224 is opened, pressurized water flows in from the inflow port of the valve seat 226 through the pipe 236, and when the inflow amount exceeds the discharge amount of the auto drip 242. The pressure water is added to the pressure switch 240 and activated to start the timer, and after a predetermined time, the water flow detection signal is output to the outside.

  As described above, the pressure control and the non-operation flow amount control can be performed by the pilot control valve 250 provided with the non-operation flow amount valve portion 252 and the pressure control pilot valve portion 254, and the miniaturization of the device can be achieved.

  In addition, in the tunnel water spray equipment, there is provided a control valve device functioning as an automatic valve device for sprinkling fire extinguishing water from the head installed in the tunnel to protect the tunnel housing from heat by fire, At the start of water discharge, the secondary pressure is low and the water discharge from the head is small and the water discharge is small, and when the predetermined time passes, the secondary pressure is raised to the specified water discharge pressure to start full water discharge. It is made to do two-step water discharge.

JP, 2011-024793, A JP 2008-104678 A Japanese Patent Application Laid-Open No. 11-128388 JP, 2006-345883, A

  However, in such a conventional control valve device, in addition to the control valve main body which opens and closes the valve body by the piston cylinder mechanism, the control pressure to the piston cylinder mechanism so that the secondary side pressure becomes a predetermined set pressure. Control equipment such as a pilot control valve with mechanical hydraulic control function to switch between is externally connected and connected by pilot piping etc. The control valve system as a whole becomes larger and the installation space becomes larger, and the cost is also increased. There is a problem of being bulky.

  Moreover, although the conventional control valve apparatus performs pressure regulation control to control the secondary side pressure to the set pressure, in order to perform constant flow control to control the secondary side flow to the set flow rate, it is necessary to use secondary side piping It is difficult to realize constant flow control because it is necessary to provide a large and costly flow meter to detect the flow.

  Furthermore, the conventional control valve device can not monitor the opening state of the valve body and the correct state of the valve body in the normal monitoring state, and for example, when the valve body of the control valve device is closed Even if it does not lead to a completely closed normal return due to etc., it will be judged to have recovered, and further, water leakage due to the occurrence of scratches on the rubber valve seat etc., valve body etc. It was very difficult to identify the deterioration of the valve function due to corrosion.

  Such a problem is the same even in a control valve device used for plant equipment and the like.

  It is an object of the present invention to provide a control valve device capable of easily realizing pressure regulation control and constant flow rate control on the secondary side and accurately determining and monitoring an internal condition such as opening and closing of a valve body. To aim.

(Control valve device)
The present invention relates to a control valve device that opens and closes a valve body by a drive mechanism and supplies liquid supplied from the primary side to the secondary side.
An opening sensor that detects the opening of the valve body;
A pressure sensor comprising a primary pressure sensor for detecting the primary pressure of the valve body and a secondary pressure sensor for detecting the secondary pressure;
A control unit that determines the flow rate flowing from the primary side to the secondary side based on the differential pressure between the primary side pressure and the secondary side pressure corresponding to the valve opening degree, and controls the piston cylinder mechanism to open and close the valve body When,
Is provided.

(Configuration of control unit)
The control unit is constituted by a computer circuit including a CPU, a memory, an input / output port, a display unit, and an operation unit, and the function of the control unit is realized by execution of a predetermined program by the CPU.

(Transmission to the upper device by the communication unit)
The control unit further includes a communication unit, and the detection unit of the opening degree sensor, the detection pressure of the primary side pressure sensor and the secondary side pressure sensor, and the flow rate calculated by the control unit Send to to process.

(Transmission to worker terminal by short distance communication)
The control unit further includes a communication unit, and the communication unit holds the detected opening degree of the opening sensor, the detected pressure of the primary side pressure sensor and the secondary side pressure sensor, and the flow amount calculated by the control unit by the communication unit. Send to a mobile terminal to be processed.

(Constant flow control and pressure regulation control)
The control unit performs constant flow control to control the flow rate of the liquid supplied to the secondary side to a predetermined set flow rate, or pressure regulation control to control the pressure of the liquid supplied to the secondary side to a predetermined set pressure Do.

(Constant flow control and pressure regulation control)
The control unit performs constant flow control to control the flow rate of the liquid supplied to the secondary side to a predetermined set flow rate, or pressure regulation control to control the pressure of the liquid supplied to the secondary side to a predetermined set pressure Do.

(Openness sensor of stroke type valve body)
The valve body is supported open / close by axial movement of the valve shaft,
The opening degree sensor is a linear detector that detects the amount of movement of the valve shaft.

(Differential pressure sensor)
The pressure sensor introduces a primary pressure and a secondary pressure, and outputs a differential pressure detection signal corresponding to the primary pressure, the secondary pressure, and the differential pressure.

(MEMS sensor)
The opening degree sensor and the pressure sensor have a MEMS structure.

(Contact sensor)
Further, the control valve device
The seat provided on the valve body or the valve seat is provided with a contact sensor for detecting a load applied when the valve body is seated on the valve seat,
The control unit determines and notifies closing and opening of the valve body, dust biting of the valve body, and damage or deterioration of the sheet, based on the load detected by the contact sensor.

(Detection of load distribution)
Contact sensors are provided at multiple locations on the seat,
The control unit is
When all the detected loads by the plurality of contact sensors are less than a predetermined opening threshold, it is determined that the valve is open,
If all detected loads by the plurality of contact sensors are equal to or greater than a predetermined closing threshold and within a predetermined load range, it is determined that the valve body is closed.
When all detected loads by the plurality of contact sensors are equal to or greater than a predetermined closing threshold and part of the detected loads exceeds the load range, it is determined that the valve body is caught in dust, scratched or deteriorated.

(Load-resistance sensor)
The contact sensor changes its resistance value according to the pressure load of the valve body.

(Automatic inspection)
Furthermore, a drainage control valve is provided to drain water from the secondary side of the valve body,
The control unit controls the flow rate of the liquid supplied to the secondary side to a predetermined set flow rate in a state in which the drainage control valve is open-controlled when the predetermined inspection instruction is received, or the secondary flow rate control Pressure control is performed to control the pressure of the liquid supplied to the side to a predetermined set pressure, and the detected opening of the opening sensor, the detected pressure of the pressure sensor, and the detected load of the contact sensor are measured. The amount is calculated, and when the abnormality is determined from the measurement result and the calculation result, the inspection abnormality is notified.

(Movement monitoring of valve body)
When the control unit receives a predetermined inspection instruction, the control unit opens and closes the valve body between the fully open position and the fully closed position, and changes the temporal change in the opening degree of the valve body detected by the opening degree sensor Determine and notify the appropriateness of the movement of the body.

(Test control valve of secondary side piping)
The piping on the secondary side of the valve body is provided with a test control valve that is closed at the time of inspection.

(Management of major components)
The control unit stores and manages management information of predetermined main constituent devices including the valve body, the opening degree sensor, and the pressure sensor in advance.

(Control of replacement time of major components)
The control unit manages the replacement time of the main component devices and notifies that the replacement time is approaching.

(Monitoring by contact sensor)
In a control valve device that opens and closes a valve body by a piston cylinder mechanism,
A contact sensor for detecting a load applied to a seat provided on a valve body or a valve seat when the valve body is seated on the valve seat;
A control unit that determines and notifies closing and opening of the valve body, dust biting of the valve body, and scratching or deterioration of the seat based on the load detected by the contact sensor;
Is provided.

(Basic effect)
The present invention relates to an opening degree sensor for detecting an opening degree of a valve body in a control valve device that opens and closes a valve body from a drive mechanism and supplies liquid supplied from the primary side to the secondary side; A pressure sensor comprising a primary pressure sensor for detecting the primary pressure and a secondary pressure sensor for detecting the secondary pressure, and a capacity coefficient corresponding to the valve opening degree between the primary pressure and the secondary pressure A flow rate from the primary side to the secondary side is determined based on the differential pressure, and a control unit for opening and closing the valve body is provided by the control of the piston cylinder mechanism. The degree of opening of the body is detected, and the differential pressure sensor detects a differential pressure between the primary side pressure and the secondary side repulsive force, and the control unit obtains the capacity coefficient corresponding to the detected degree of valve opening from the memory. , The flow rate is calculated based on the differential pressure and the volume coefficient, and the valve body is opened It is possible to know the supply flow rate for the next side easily and accurately.

  Moreover, although the open / close monitoring of the conventional valve body was mechanically determined by providing the limit switch outside, in the control valve device of the present invention, the degree of opening sensor, pressure sensor, and contact sensor are comprehensively integrated. In order to make a judgment, the reliability of the judgment is improved. Since determination can be made by a plurality of sensors, it is possible to have redundancy in the determination.

(Effect by configuration of control unit)
Further, the control unit is constituted by a computer circuit comprising a CPU, a memory, an input / output port, a display unit and an operation unit, and the control unit function is realized by execution of a predetermined program by the CPU. By providing the control function realized by the execution of the program by the CPU, it is possible to realize a highly intelligent water flow detection device such as an output function of a water flow detection signal based on calculation of water flow amount and an automatic inspection function.

(Effect by transmission to higher-level device by communication unit)
In addition, the control unit further includes a communication unit, and the communication unit makes the detection position of the opening sensor, the detection pressure of the pressure sensor, the flowing water amount calculated by the control unit, and the flowing water detection signal Since transmission and processing are performed, by connecting to the monitoring control panel etc. of the monitoring center by radio or cable, in order to obtain information such as abnormal rise of piping pressure in summer, it does not go near the equipment but at a distance It is possible to construct a system that can constantly monitor conditions, monitor abnormalities, check instructions, etc.

  For example, by monitoring the opening degree, pressure, and flow rate of the control valve device on the monitoring center side, failure prediction and state monitoring can be performed, and failure determination and failure prediction of the control valve device become possible, and the facility equipment stops. Thus, it becomes possible to repair and replace the control valve device before it becomes dysfunctional, and to improve the reliability of the equipment using the control valve device.

(Effect by transmission to worker terminal by short distance communication)
Further, the control unit further includes a communication unit, and the operator detects the detected opening degree of the opening sensor, the detected pressure of the primary side pressure sensor and the secondary side pressure sensor, and the amount of flowing water calculated by the control unit by the communication unit. Since it is made to transmit and process to the portable terminal possessed by the control valve device, the portable terminal of the worker is carried out when the field work such as repair replacement or adjustment is performed at the site where the control valve device is installed. The detection opening, primary pressure, secondary pressure, and controlled water volume are displayed, and it is possible to appropriately determine the operating condition of the control valve device, and efficiently advance maintenance and management of the facility with high accuracy. it can.

(Effect of constant flow control and pressure regulation control)
In addition, the control unit controls the flow rate of the liquid supplied to the secondary side to a predetermined set flow rate, or controls the pressure of the liquid supplied to the secondary side to a predetermined set pressure. Since the control is performed, even if the pressure on the primary side fluctuates, control to maintain the flow rate to the secondary side at the set flow rate can be performed reliably by constant flow rate control. The pressure control can reliably control the secondary side pressure to be maintained at the set pressure.

(Effect of opening degree sensor of stroke type valve body)
Further, the valve body is supported so as to be openable and closable by axial movement of the valve shaft, and the opening degree sensor is a linear detector for detecting the amount of movement of the valve shaft. Calculate the flow rate by reading the capacity coefficient corresponding to the detected opening degree from the correspondence table of the opening degree and capacity coefficient stored in advance in the memory of the control unit, etc. It can be performed.

(Effect of pressure sensor to detect differential pressure)
In addition, the pressure sensor introduces a primary pressure and a secondary pressure, and outputs a differential pressure detection signal according to the primary pressure, secondary pressure and differential pressure, so it corresponds to the degree of opening. The differential pressure necessary for determining the flow rate from the flow rate coefficient can be easily detected.

(Effect of MEMS sensor)
In addition, since the opening sensor and pressure sensor have a MEMS (Micro Electro Mechanical System) structure, the flow sensor is provided with an opening sensor and a pressure sensor because it is an ultra-small sensor integrated by microfabrication technology. Can be the same as or smaller than the conventional one.

(Effect of tactile sensor)
The water flow detection device further includes a contact sensor for detecting a load applied when the valve body is seated on the valve seat, and a control unit is detected by the contact sensor. Based on the pressing load, the valve body is closed and opened, the dust bite of the valve body is bitten, and the scratch or deterioration of the sheet is determined and output, for example, contact sensors are provided at a plurality of locations of the sheet. Is determined that the valve body is open when all of the detected loads by the plurality of contact sensors are less than or equal to the predetermined opening threshold, and all of the detected loads by the plurality of contact sensors are equal to or more than the predetermined closing threshold and within the predetermined load range When it is determined that the valve body is closed, it is judged that the valve body is closed, and if all of the detected loads by the multiple contact sensors are above the predetermined closing threshold and part of the detected load exceeds the load range Or it is determined that the contact sensor is deteriorated Since the resistance value is changed according to the contact load of the body, a plurality of contact sensors are provided on the seat provided on the valve seat or the valve body. If the detected load is uniform, it can be determined that the valve body is completely closed. On the other hand, if it is less than the predetermined release load, it is known that the valve body is open. Knowing can increase the reliability of the maintenance of the facility.

  In addition, when the valve body recovers after opening the valve body, if the detected loads by the plurality of contact sensors provided on the seat are not uniform, the detection range of the contact sensor in which the detected load is abnormal and It becomes possible to know an abnormality such as dust biting, damage or deterioration in the part of the valve seat, and failure, failure prediction, preventive maintenance (maintenance such as replacement before failure) etc. do not disassemble the valve. Also, the need for inspection and maintenance, and the determination of a failure can be made, and the reliability of maintenance and management of the facility can be increased.

(Automatic inspection)
Further, the control valve device is further provided with a drainage control valve for draining water from the secondary side of the valve body, and the control unit controls the drainage control valve to be opened when receiving a predetermined inspection instruction, Constant flow rate control to control the flow rate of the liquid supplied to the secondary side to a predetermined set flow rate, or pressure regulation control to control the pressure of the liquid supplied to the secondary side to the predetermined set pressure, and open Measure the opening degree of the degree sensor, the pressure detected by the pressure sensor, the detected load of the contact sensor, and calculate the amount of water flow by the control unit, and notify the inspection abnormality when the abnormality is determined from the measurement result and the calculation result Therefore, in addition to the automatic inspection of the entire facility, the automatic inspection of the control valve unit alone and the automatic inspection performed simultaneously by multiple systems become possible.

(Effect of monitoring movement of valve body)
In addition, when the control unit receives a predetermined inspection instruction, the control unit causes the valve body to open and close between the fully open position and the fully closed position, and temporal change in the opening degree of the valve body detected by the opening degree sensor Since it determines and notifies the propriety of the movement of the valve body from that, for example, it measures the open time until the valve body opens to a certain degree of opening at the time of inspection, and the valve body completely closes at the end of the inspection. Measure the closing time until the opening and / or closing takes time, it is understood that the movement of the valve body is aggravated, noticing the sign of internal abnormality such as rust, etc., promotion of precision inspection By promoting recommendations, etc., appropriate measures can be made for preventive maintenance.

(Effect of test water control valve on secondary side piping)
Also, if it is not possible to supply the secondary side equipment with liquid to the piping on the secondary side of the valve body, close the test control valve at the time of inspection and open the drainage control valve. In the state where the liquid flows from the primary side to the drain pipe on the secondary side by opening the valve of the control valve device without supplying the liquid to the equipment on the secondary side, the actual operation by constant flow control and pressure regulation control The inspection can be done in the same way as when it was operated.

(Effect of management of major components)
In addition, the control unit prestores and manages management information of predetermined main components including the valve body, the opening degree sensor, and the pressure sensor. For example, the control unit manages replacement time of the main components and replaces it. Since it was made to notify that the time was approaching, the administrator or inspection personnel etc. knew that the time to replace the main components of the control valve was approaching during operation of the equipment, for example, a valve seat seat which becomes consumables Knowing the replacement time, etc. and making work plans and schedules, it is possible to properly perform the work necessary for preventive maintenance.

Explanatory drawing which showed the embodiment taking the control valve apparatus provided in sprinkler installation as an example. Explanatory drawing which took out and showed the contact sensor provided in the valve seat of the control valve apparatus Explanatory drawing which showed other embodiment which provided the contact sensor in the valve body side. Block diagram showing the functional configuration of the control unit provided in the control valve device Flow chart showing constant flow control of control valve device Flow chart showing pressure regulation control of control valve device Flow chart showing control control of control valve device Explanatory drawing which showed embodiment of the control valve apparatus provided in the tunnel water spray installation Flow chart showing the two-stage constant flow rate control of the control valve device that performs advance notice water discharge and full water discharge Flow chart showing the two-step pressure regulation control of the control valve device that performs advance notice water discharge and full water discharge Explanatory drawing which showed the conventional control valve apparatus which performs secondary side pressure regulation provided with the water flow detection function

[Structure of control valve device]
FIG. 1 is an explanatory view showing an embodiment of a control valve device provided in a sprinkler system as an example.

(Basic structure)
As shown in FIG. 1, in the control valve device 10 of the present embodiment, the inlet 14 is formed on the lower side of the device body 12 and the primary side pipe 18 is connected, and the outlet 16 is formed on the upper side. The side piping 20 is connected, and the secondary side piping 20 is drawn out to the protected area via the water flow detection device 21 and the closed sprinkler head 22 is connected.

  Inside the apparatus main body 12, a valve body 24 which is opened and closed by a piston cylinder mechanism which functions as a drive unit is provided. The piston cylinder mechanism incorporates a piston 25 in a cylinder 26 so as to be slidable in an axial direction (lateral direction in the drawing), and a cylinder chamber 28 partitioned by a partition member 31 is formed in the cylinder 26. A cylinder inlet / outlet 32 is in communication with 28.

  A guide rod 27 is connected to the central axis of the valve body 24, and the tip of the guide rod 27 is taken out through the end of the cylinder 26. The valve body 24 opened and closed by the piston cylinder mechanism is pressed by the rubber valve seat 30 disposed on the annular valve seat 33 in the closed position shown to close the flow path.

  A drainage pipe 34 is drawn out from the secondary side of the apparatus body 12, and a drainage control valve 36 using a motorized valve is provided in the middle of the drainage pipe 34.

  An electromagnetic switching valve 52 is provided to open and close the valve body 24 by the piston cylinder mechanism. The electromagnetic switching valve 52 is provided with a primary pressure port A, a cylinder port B and a secondary pressure port C, and the primary pressure port A is connected to the primary side of the apparatus body 12 via the check valve 57 and the gate valve 56, The cylinder port B is connected to the cylinder inlet / outlet 32, and the secondary pressure port C is connected to the secondary side of the apparatus body 12.

  Further, the electromagnetic switching valve 52 has the electromagnetic solenoid 54 and the spring 55 at a relative position, and in the normal monitoring state, it is in the illustrated first switching position 52a where the energization of the electromagnetic solenoid 54 is turned off. It is switched to the second switching position 52b.

  Further, the control valve device 10 is provided with a primary side pressure sensor 48, a secondary side pressure sensor 50, an opening degree sensor 46, and a contact sensor 64 as sensors used for constant flow rate control, pressure regulation control, inspection control, etc. ing.

  A display unit 60 and an operation unit 62 are provided on the end face of the case cover 38 in which the control unit 40 is housed. The display unit 60 is, for example, a color liquid crystal display, on which various types of information necessary for control, inspection, maintenance and the like of the control valve device 10 are displayed. The operation unit 62 is provided with various switches necessary for controlling the control valve device 10 such as a power switch, an inspection switch, and a recovery switch.

  The outline of the control operation of the control valve device 10 is as follows. In the normal monitoring state, the electromagnetic switching valve 52 is in the first switching position 52a shown, the primary pressure port A communicates with the secondary pressure port C, and primary pressurized water for fire extinguishing obtained through the orifice 53. The valve body 24 connected to the piston 25 is supplied to the valve seat 30 of the valve seat 33 by the force of the return spring 29 because the primary side pressure and the secondary side pressure are at the same pressure. It is pressed to close the flow path.

  When the sprinkler head 22 is activated by a fire and the fire extinguishing water is released, the pressure in the piping decreases rapidly, and the pressure switch of the air tank branched and connected to the water main detects the pressure drop and the fire extinguishing pump The water for fire extinguishing is continuously supplied.

  When the control unit 40 detects a decrease in the secondary pressure due to the operation of the sprinkler head 22 by the secondary pressure sensor 50, it performs constant flow control or pressure regulation control to be clarified in the following description by control of the electromagnetic switching valve 52. Supply the fire extinguishing water to the secondary side and discharge it. At this time, the water flow detection device 21 detects and operates the water flow, and transmits a water flow detection signal E1 to the sprinkler control panel or the monitoring center to output a fire alarm.

  When the fire is extinguished, the water discharge from the operated sprinkler head 22 can be stopped by closing the gate valve 19 provided on the primary side pipe 18.

[Sensor and control unit of control valve device]
The control valve device 10 of this embodiment performs constant flow rate control, pressure adjustment control, check control, and accurately determines and monitors the internal condition such as opening / closing of the valve body, so that various sensors and control units Is provided.

(Opening sensor)
As shown in FIG. 1, a guide rod 27 whose one end is fixed to the valve body 24 penetrates the end of the cylinder 26 and is taken out to the outside, and an opening degree sensor 46 is provided there. In the present embodiment, as the opening degree sensor 46, a linear sensor that detects the amount of movement of the guide rod 27 in the axial direction is provided. A signal line from the opening degree sensor 46 is drawn to the outside and connected to a control unit 40 provided in the case cover 38 using a connector.

  The opening degree sensor 46 detects the opening degree of the valve body 24 with the movement amount when the valve body 24 is fully opened as 100% when the movement amount of the closed position of the illustrated valve body 24 is 0%.

  The opening degree of the valve body 24 detected by the opening degree sensor 46 has a capacity coefficient Cv necessary when the flow rate Q flowing at the opening of the valve body 24 is calculated by the control unit 40, as will be clarified in the later description. Used to read from memory.

(Pressure sensor)
As shown in FIG. 1, a primary side pressure sensor 48 is provided on the primary side partition of the device body 12, and a secondary side pressure sensor 50 is provided on the secondary side partition.

  The primary pressure sensor 48 is incorporated in the bulkhead on the primary side of the apparatus main body 12 and has a pressure introducing port opened inside, and the outside is closed by screwing the sensor plug 49, and the signal line from the primary pressure sensor 48 Is pulled out to the outside through the sensor plug 49 and connected to a control unit 40 provided on the case cover 38 by a connector.

  Similarly, the secondary side pressure sensor 50 is incorporated in the partition of the secondary side of the apparatus main body 12 and has a pressure introducing port opened inside, and the outside is closed by screwing the sensor plug 51, and the secondary side pressure A signal line from the sensor 50 is drawn to the outside through the sensor plug 51 and connected to a control unit 40 provided on the case cover 38 by a connector.

The primary side pressure sensor 48 detects the primary side pressure P1, the secondary side pressure sensor 50 detects the secondary side pressure P2, and the control unit 40 detects the flow rate Q associated with the opening and closing of the valve body 24 as described later. Differential pressure ΔP to calculate ΔP = P2−P1
As you are seeking.

  Therefore, the differential pressure calculation by the primary side pressure sensor 48, the secondary side pressure sensor 50 and the control unit 40 substantially realizes the function as a differential pressure sensor.

  In place of the function of the differential pressure sensor by differential pressure calculation by the primary side pressure sensor 48, the secondary side pressure sensor 50, and the control unit 40, a differential pressure sensor may be provided in the apparatus main body. The differential pressure sensor introduces the primary side pressure P1 and also the secondary side pressure P2, and generates a differential pressure detection signal corresponding to the primary side pressure P1, the secondary side pressure P2, and the differential pressure ΔP (= P2-P1). Configure to output.

In addition, the primary side pressure sensor 48 and the secondary side pressure sensor 50 used for differential pressure detection have a MEMS structure, thereby forming a microminiature sensor integrated by the microfabrication technology, as shown in the figure, the device main body 12 Embedded in the bulkhead of the
This point is the same as in the case of using a differential pressure sensor.

  In the present embodiment, since the control valve device 10 is started by detecting the decrease in the secondary pressure P2 due to the operation of the sprinkler head 22, the pressure sensor is not used, and the primary pressure sensor 48 is used. It is desirable to separately provide the secondary side pressure sensor 50.

(Contact sensor)
As shown in FIG. 1, a contact sensor 64 is provided on the valve seat 30 of the valve seat 33 where the valve body 24 is pressed in a closed state. The contact sensor 64 detects the pressure load of the valve body 24 applied to the rubber valve seat 30 and outputs the pressure load to the control unit 40.

  The control unit 40 determines the opening and closing of the valve body 24 from the detected load of the contact sensor 64, and determines an abnormality such as dust biting, damage or deterioration of the valve seat 30 from the distribution of the detected load.

  FIG. 2 is an explanatory view showing the contact sensor provided on the valve seat of the control valve device, showing a plane in FIG. 2 (A) and an XX cross section of the sensor body in FIG. 2 (B) .

  As shown in FIG. 2A, the contact sensor 64 has sixteen sensor bodies 66 arranged at predetermined angle units, for example, 22.5 degrees with respect to a ring-shaped holder 65 using insulating rubber. As shown in FIG. 2B, the sensor main body 66 has the electrodes 70 and 72 disposed on both sides of the conductive rubber 68 and draws out the lead wires 74a and 74b.

  When a load F is applied to the conductive rubber 68 of the sensor main body 66, the resistance value of the conductive rubber 68 between the electrodes 70 and 72 changes. For example, when the load F increases, the resistance value decreases, and when the load F decreases, the resistance value increases, and the load applied to the sensor main body 66 is detected electrically as a change in the resistance value as a change in voltage or current. It can be detected.

  Further, by arranging the plurality of sensor main bodies 66 in a ring shape, positional load detection, that is, load distribution applied to the valve seat 30 can be detected. Note that the resolution of the load distribution may be realized by the number of installed sensor main bodies 66.

  FIG. 3 is an explanatory view showing another embodiment in which the contact sensor is provided on the valve body side. As shown in FIG. 3, in the control valve device of the present embodiment, a ring-shaped valve seat 35 is disposed on the pressing surface of the valve body 24 facing the valve seat 33, and behind the valve seat 35, FIG. The ring-shaped contact sensor 64 shown in FIG.

  In the present embodiment, since the contact sensor 64 is disposed on the side of the valve body 24 that opens and closes, the signal line from the contact sensor 64 forms a wiring pattern on the strip-like flexible printed circuit board to form the valve body 24 and the control unit 40. You just have to connect between

[Controller unit]
FIG. 4 is a block diagram showing a functional configuration of a control unit provided in the control valve device. As shown in FIG. 4, the control unit 40 of the control valve device includes a control processor 75, and for the bus 84 of the control processor 75, an opening sensor 46 and a primary pressure sensor 48 provided in the device body 12, The secondary side pressure sensor 50 and the contact sensor 64 are connected via an AD conversion port (not shown).

  Further, for the bus 84 of the control processor 75, a display unit 60 using a liquid crystal color display, and an operation unit 62 provided with at least an inspection switch and a recovery switch are provided.

  Furthermore, for the bus 84 of the control processor 75, a wireless communication unit 86 having an antenna 88 and a wired communication unit 90 from which the transmission cable 91 is pulled out are provided.

  The wireless communication unit 86 conforms to, for example, STD-30 (specific low power security system wireless station standard) which is known as a standard for a specific low power wireless station in the 426 MHz band, and includes 426.2500 MHz to 426.8375 MHz. And 48 channels having a frequency bandwidth of 12.5 kHz are allocated between the two channels, and transmit and receive signals with the monitoring center using one of the channel frequencies.

  The wired communication unit 90 transmits and receives signals to and from the monitoring center according to, for example, a LAN communication protocol. The wireless communication unit 86 and the wired communication unit 90 may be either one as needed.

(Function of control unit)
The control processor 75 is provided with a CPU 76, and a control logic 78, a ROM 80 and a RAM 82 are connected to a bus 84 from the CPU 76. The control logic 78 implements various hardware functions such as bus control accompanying control processing of the CPU 76. The CPU 76 is provided with the function of the control unit 77 realized by executing a program.

  The control unit 77 detects a decrease in secondary side pressure due to the operation of the sprinkler head 22, and controls the flow rate of extinguishing water supplied to the secondary side to a predetermined set flow rate, or the secondary side Pressure control is performed to control the pressure of the extinguishing water supplied to the to a predetermined set pressure. In addition, when receiving an inspection instruction, the control unit 77 performs predetermined inspection control. In addition, as to whether the control unit 77 performs constant flow control or pressure adjustment control, either one is selected in advance as necessary.

[Constant flow control]
The control unit 77 provided in the CPU 76 of FIG. 4 performs the next constant flow control by detecting that the secondary side pressure P2 has dropped below a predetermined value by sprinkling of fire extinguishing water by the operation of the sprinkler head 22 due to a fire. .

  When detecting that the secondary pressure P2 has dropped below the predetermined pressure, the controller 77 energizes the electromagnetic solenoid 54 of the electromagnetic switching valve 52 to switch from the first switching position 52a in the normal monitoring state to the second switching position 52b. Water from the primary pressure port A is supplied to the cylinder chamber 28 and the piston 25 is stroked to the right in the figure against the return spring 29, and the valve body 24 is opened to pressurize the primary side. Water for fire fighting is supplied to the secondary side.

  In this state, the control unit 77 determines the opening degree A of the valve body 24 detected by the opening degree sensor 46, the primary pressure P1 detected by the primary pressure sensor 48, and the secondary detected by the secondary pressure sensor 50. The side pressure P2 is periodically read by AD conversion, and the flow rate Q of the control valve device 10 is calculated and determined.

  In order to calculate the flow rate Q by the control unit 77, a capacity coefficient table 85 is stored in advance in the RAM. In the capacity coefficient table 85, a capacity coefficient Cv corresponding to the opening degree A of the valve body 24 is stored in advance.

The volume coefficient Cv of the valve is given by the following equation.
Cv = K · Q · (G / ΔP) 1/2 (Equation 1)
Q: Flow rate G: Specific gravity (G = 1 for water)
ΔP: Differential pressure K: Constant

  For this reason, at the manufacturing stage, the flow rate Q and the differential pressure ΔP are measured while changing the opening degree A of the valve body 24 in the control valve device 10, the capacity coefficient Cv is obtained from (Equation 1), and registered in the capacity coefficient table 85. , This is stored in advance in the RAM 82.

Therefore, the control unit 77 reads out the corresponding capacity coefficient Cv by referring to the capacity coefficient table 85 based on the detected opening degree A of the opening degree sensor 46, and detects the primary side pressure P1 detected by the primary side pressure sensor 48 From the secondary pressure P2 detected by the secondary pressure sensor 50, the differential pressure ΔP is ΔP = P2−P1
The flow rate Q is calculated by the following equation.
Q = Cv / {K (G / ΔP) 1/2} (Equation 2)

  Subsequently, the control unit 77 compares the calculated flow rate Q with a predetermined threshold flow rate Qth previously set as the target flow rate of the sprinkler head 22, and continues the energization of the electromagnetic switching valve 52 if it is less than the threshold flow rate Qth. By setting the second switching position 52b, the primary-side pressurized water is supplied to the cylinder chamber 28, and the valve body 24 is stroked in the opening direction to increase the flow rate Q.

  On the other hand, when the water flow rate Q determined by calculation becomes equal to or greater than the threshold flow rate Qth, the controller 77 turns off the energization of the electromagnetic switching valve 52 and returns it to the first switching position 52a, and the cylinder chamber 28 is secondary side. And the valve body 24 is stroked in the closing direction, and the flow rate Q is reduced.

  By such control of the control unit 77, constant flow rate control is performed in which a constant flow rate which is the threshold flow rate Qth is supplied from the control valve device 10 to the sprinkler head 22 in operation.

  FIG. 5 is a flowchart showing the constant flow rate control of the control valve device, which is controlled by the control unit 77 provided in the CPU 76.

  As shown in FIG. 5, when the controller 77 determines that the secondary pressure P2 detected by the secondary pressure sensor 50 in step S1 has dropped below a predetermined value, the process proceeds to step S2, and the solenoid switching valve 52 The valve body 24 is driven to open by energization to the

  Subsequently, the control unit 77 detects the opening degree A of the valve body 24 detected by the opening degree sensor 46 in step S3, the primary side pressure P1 detected by the primary side pressure sensor 48, and the secondary side pressure sensor 50. The secondary pressure P2 is read, and the process proceeds to step S4. The capacity coefficient Cv corresponding to the opening degree A is read by referring to the capacity coefficient table 85 of the RAM 82 and the differential pressure ΔP is determined as ΔP = P2-P1. The flow rate Q is calculated by calculation according to the above (Equation 2).

  Subsequently, the control unit 77 proceeds to step S6 and compares the flow rate Q calculated in step S5 with the threshold flow rate Qth set as the control target, and if less than the threshold flow rate Qth, the process proceeds to step S7 to energize the electromagnetic switching valve 52. Continues to open the valve body 24 to increase the flow rate Q. On the other hand, if it is equal to or higher than the threshold flow rate Qth, the process proceeds to step S8 to deenergize the electromagnetic switching valve 52 and close the valve body 24. The flow rate Q is decreased, and the process from step S3 is repeated until an instruction to stop water discharge is given in step S9, and constant flow rate control is performed to supply a constant flow rate to the threshold flow rate Qth to the sprinkler head 22 in operation.

  When the controller 77 determines in step S9 that the fire has been stopped by extinguishing the fire, the process proceeds to step S10, and the solenoid switching valve 52 is continuously turned off to drive the valve 24 closed and fully closed. Water discharge from the operated sprinkler head 22 is stopped.

Pressure control
The control unit 77 provided in the CPU 76 of FIG. 4 performs the next pressure control control by detecting that the secondary side pressure has dropped to a predetermined value or less by sprinkling of fire extinguishing water by the operation of the sprinkler head 22 due to a fire.

  When detecting that the secondary pressure P2 has dropped below the predetermined pressure, the controller 77 energizes the electromagnetic solenoid 54 of the electromagnetic switching valve 52 to switch from the first switching position 52a in the normal monitoring state to the second switching position 52b. The primary pressure water from the primary pressure port A is supplied from the cylinder port B to the cylinder chamber 28 and the piston 25 is stroked to the right in the figure against the return spring 29 to open the valve body 24 on the primary side. Supply the pressurized fire extinguishing water to the secondary side.

  In this state, the control unit 77 compares the secondary pressure P2 detected by the secondary pressure sensor 50 with a predetermined threshold pressure Pth preset as a target pressure of the sprinkler head 22, and is less than the threshold pressure Pth. In this case, by supplying current to the electromagnetic switching valve 52 and setting it as the second switching position 52b, the primary-side pressurized water obtained through the orifice 53 is supplied to the cylinder chamber 28, and the valve element 24 is stroked in the opening direction. , To increase the secondary pressure P2.

  On the other hand, when the secondary pressure P2 becomes equal to or higher than the threshold pressure Pth, the controller 77 turns off the solenoid valve 52, returns it to the first switching position 52a, and returns the primary pressure and the secondary pressure. By equalizing the pressure, the valve body 24 is stroked in the closing direction by the force of the return spring 29, and the secondary pressure P2 is reduced.

  By such control by the control unit 77, pressure adjustment control is performed in which the extinguishing water supplied from the control valve device 10 to the sprinkler head 22 in operation is controlled to a constant pressure which becomes the threshold pressure Pth.

  FIG. 6 is a flowchart showing pressure regulation control of the control valve device, which is controlled by the control unit 77 provided in the CPU 76.

  As shown in FIG. 6, when the controller 77 determines that the secondary pressure P2 detected by the secondary pressure sensor 50 in step S11 has dropped below a predetermined value, the controller 77 proceeds to step S12 and switches the solenoid switching valve. The valve body 24 is driven to open by turning on the current supply to 52.

  Subsequently, the control unit 77 reads the secondary pressure P2 detected by the secondary pressure sensor 50 in step S13, proceeds to step S14, and compares with the threshold pressure Pth set as the control target, and is less than the threshold pressure Pth. If it is, the process proceeds to step S15, the energization of the solenoid switching valve 52 is continued to drive the valve 24 open to increase the pressure, and if it is the threshold pressure Pth or more, the routine proceeds to step S16 to switch the solenoid switching valve. 52 is deenergized to close the valve body 24 to decrease the secondary pressure P2, and the process from step S13 is repeated until an instruction to stop water discharge is given in step S17, and the threshold value for the sprinkler head 22 in operation is thresholded Pressure adjustment control is performed to supply extinguishing water at a constant pressure that results in a pressure Pth.

  When the controller 77 determines in step S17 that the fire has been stopped by extinguishing the fire, the process proceeds to step S18, and the solenoid switching valve 52 is continuously turned off to drive the valve 24 closed and fully closed. Water discharge from the operated sprinkler head 22 is stopped.

[Inspection control]
(Inspection control function)
The control unit 77 provided in the CPU 76 of FIG. 4 performs the following inspection control. The control unit 77 opens the drainage control valve 36 when receiving an inspection instruction by the operation of the inspection switch of the operation unit 62 or the reception of the inspection instruction signal from the monitoring center, and the secondary side piping 20 to the sprinkler head 22 An operation test is performed in which the valve body 24 is opened by drainage at the same flow rate as when one unit is operated.

  The controller 77 performs constant flow rate control shown in the flow chart of FIG. 5 or pressure adjustment control shown in the flow chart of FIG. 6 in the drainage state by opening control of the drainage control valve 36, and the inspection flow rate Q is a predetermined threshold flow rate Qth. If the secondary pressure P2 is controlled to a predetermined threshold pressure Pth, then it is determined to be normal, otherwise it is determined that the inspection is abnormal and control is made to output an alarm prompting a detailed inspection. .

  In addition, when the control unit 77 determines the inspection end instruction, controls the drainage control valve 36 to close, and closes the valve body 24 by stopping the flowing water, it is detected by the contact sensor 64 provided on the valve seat 30. Load and load distribution applied to the valve seat 30 by the pressure of the valve body 24 are read, and closing and opening of the valve body 24, dirt biting of the valve body 24, and damage or deterioration of the valve seat 30 are determined and displayed Control is performed by notifying the monitoring center as a check result and displaying on the part 60.

  Here, as shown in FIG. 2, the contact sensor 64 is provided with the sensor body 66 at a plurality of locations of the ring-shaped holder 65 to detect the pressing load, so the valve seat seat is pressed by the pressure of the valve body 24. The distribution state of the load applied to 30 is detected, and when all the detection loads by the plurality of sensor bodies 66 in the contact sensor 64 are less than the predetermined release threshold value, it is determined that the valve body 24 is open. Control is performed to determine that the valve body 24 is closed if all of the detected loads according to the above are equal to or higher than a predetermined closing threshold value and within a predetermined load range.

  Further, the control unit 77 bites the dust on the valve body 24 when all of the detection loads by the plurality of sensor bodies 66 in the contact sensor 64 are equal to or more than a predetermined closing threshold and part of detection loads exceed the load range. It is determined that a scratch or deterioration has occurred and is displayed on the display unit 60 and transmitted as a check result to the monitoring center to output a warning for prompting a precise check indicating an abnormality inside the valve.

  For this reason, the inspection qualified person can know the abnormality such as the bite, the damage or the deterioration of the dust in the control valve device 10 which has been inspected, and the failure, the failure prediction, the preventive maintenance (replacement before failure etc. Maintenance) can be understood without disassembling the valve, and the necessity of inspection and maintenance, judgment of failure, etc. can be made, and the reliability of maintenance and management of equipment can be increased.

(Check control operation)
FIG. 7 is a flowchart showing inspection control of the control valve device, which is control by the control unit 77 provided in the CPU 76.

  As shown in FIG. 7, when the control unit 77 determines that there is an inspection instruction in step S21, the control unit 77 enters an inspection mode, proceeds to step S22, and drains provided in the drainage pipe 34 drawn from the secondary side of the control valve device 10. The control valve 36 is controlled to open, and the operation test is performed to open the valve body 24 by drainage of the same flow rate as one of the sprinkler heads 22 is operated. In addition, at the time of inspection, a predetermined operation is performed so that the water flow detection signal E1 is not output from the water flow detection device 21.

  Subsequently, in step S23, the control unit 77 performs constant flow control or pressure adjustment control, and in step S24, if the control flow rate or control pressure is normal, the process proceeds to step S25 to determine normality, while control in step S24. If the flow rate Q does not reach the threshold flow rate Qth, or if the control pressure P2 does not reach the threshold flow rate Pth, the process proceeds to step S26, an abnormality is determined as an inspection result, and a request for precision inspection is displayed on the display unit 60 Report by the monitoring center.

  Subsequently, when the control unit 77 proceeds to step S27 and determines that there is an inspection end instruction by the operation of the recovery switch of the operation unit 62 or the reception of a recovery signal from the monitoring center, etc., the control unit 77 proceeds to step S28 and closes the drainage control valve 36. It controls and stops drainage, and thereby the valve element 24 of the control valve device 10 returns to the closed position and recovers.

  Subsequently, the control unit 77 reads a plurality of detected loads indicating the load distribution by the contact sensor 64 in step S29, and proceeds to step S31 if all the detected loads are equal to or more than the predetermined closing load in step S30. If the load is within the predetermined load range, it is determined that the closing load is uniform, and the process proceeds to step S 32, and the valve body 24 is in a completely closed state completely in contact with the valve seat 30 to determine inspection normal return End inspection control.

  On the other hand, when the valve body 24 is closed, if there is a dust bite in which dust is caught between the valve sheet 24 and the valve seat 30, some of the plurality of detected loads detected by the contact sensor 64 are predetermined. Even if the load is less than the closing load or more than the predetermined threshold load, the load distribution is not uniform beyond the predetermined load range, and the load distribution of the valve seat 30 is abnormal at step S30 or step S30. It is determined in S31, the process proceeds to step S33, the possibility of dust biting is determined, and a precision inspection request is displayed on the display unit 60 and notified by the monitoring center.

  In addition, even if the valve seat 30 is scratched or partially cured due to deterioration, the load distribution applied to the valve seat 30 by the pressure of the valve body 24 becomes uneven, which may cause scratches or degradation. Abnormality of the load distribution in the valve seat 30 caused is determined in step S30 or step S31, and the process proceeds to step S33 to determine the possibility of scratches and deterioration in addition to dust bite, and the precision inspection request is displayed on the display unit 60 At the same time as displaying it, let the monitoring center notify you.

(Repair judgment of control valve device)
Further, as another restoration judgment of the control valve device 10 in the inspection control, the control unit 77 determines the primary side pressure detected by the primary side pressure sensor 48 when the detection opening degree A of the opening degree sensor 46 is a predetermined fully closed opening degree. Normal recovery is determined when P1 and the secondary pressure P2 detected by the secondary pressure sensor 50 become substantially the same, and in other cases, recovery abnormality is determined and reported, promotion of precision inspection, etc. May be encouraged.

(Monitoring control of movement of valve body)
Further, when the valve body 24 of the control valve device 10 opens and closes by opening and closing the drainage control valve 36 in the inspection control, the control unit 77 opens time until the valve body 24 opens to a certain opening degree, and If the closing time until the valve body 24 is completely closed is measured, and it is determined that the opening time and / or the closing time is longer than a predetermined normal operating time, the movement of the valve body 24 is aggravated By outputting a fault alarm indicating that the movement of the valve body 26 is bad, to be aware of a sign of internal abnormality of the control valve device 10 such as rust, etc., and promoting promotion of detailed inspection, etc. To take appropriate measures and preventative maintenance.

[Management control of major components]
The controller 77 provided in the CPU 76 of FIG. 4 includes a valve seat 30, an opening degree sensor 46, a primary pressure sensor 48, a secondary pressure sensor 50, and a contact sensor 64 provided in the control valve device 10. Management information such as main components, consumables, regular replacements, etc. are stored and managed in advance, and necessary management information is displayed on the display unit 60 and notified to the monitoring center, and control necessary to promote necessary measures Do.

  For example, the control unit 77 stores, in advance in the RAM 82, management information such as the date of manufacture of main constituent devices, the date of replacement of consumables such as rubber, and regular replacements. Therefore, the inspection qualified person or the like can know the replacement time and the like by reading out the management information from the RAM 82 by the operation of the operation unit 62 and displaying it on the display unit 60 as necessary. In addition, when the replacement time is approaching, the control unit 77 displays a caution on the display unit 60, activates the caution indicator light, and further performs control to notify the monitoring center, etc. Inform and allow appropriate action.

  When the control valve device 10 is disassembled and replaced with a new one, it is necessary to correct the management information according to the consumables and regular replacements whose replacement has been replaced, but when the replacement repair is completed and the power is turned on again. By displaying a message prompting the user to correct the management information, etc. on the display unit 60, the management information is corrected, and it is possible to correctly manage the next replacement time even for consumables and regular replacements that have been exchanged. It becomes.

[Control valve device of tunnel water spray equipment]
FIG. 8 is an explanatory view showing an embodiment of a control valve device provided in a tunnel water spray facility.

(Basic structure)
As shown in FIG. 8, the control valve device 10 of this embodiment functions as an automatic valve device for tunnel water spray equipment, the primary side piping 18 is connected to the inflow port 14 of the apparatus main body 12, and the outflow port 16 is It is connected to the open water spray head 94 installed in the tunnel through the test water control valve 92 by the secondary pipe 20.

  A primary pressure port A, a cylinder port B and a drainage port C are provided in the electromagnetic switching valve 52 to drive the valve body 24 to open and close by the piston cylinder mechanism, and the primary pressure port A is via a check valve 57 and a gate valve 56 The cylinder port B is connected to the cylinder inlet / outlet 32, and the drainage port C is connected to the drainage pipe 34 on the secondary side of the drainage control valve 36.

  In the normal monitoring state, the electromagnetic switching valve 52 is in the first switching position 52a shown, the cylinder port B communicates with the drainage port C, and the valve body 24 connected to the piston 25 is a valve seat by the force of the return spring 29. The flow path is closed by being pressed by the valve seat 30 of 33.

  The control unit 77 provided in the CPU 76 of FIG. 4 performs the next pressure control control by detecting that the secondary side pressure has dropped to a predetermined value or less by sprinkling of fire extinguishing water by the operation of the sprinkler head 22 due to a fire.

  When detecting that the secondary pressure P2 has dropped below the predetermined pressure, the controller 77 energizes the electromagnetic solenoid 54 of the electromagnetic switching valve 52 to switch from the first switching position 52a in the normal monitoring state to the second switching position 52b. The primary pressure water from the primary pressure port A is supplied from the cylinder port B to the cylinder chamber 28 and the piston 25 is stroked to the right in the figure against the return spring 29 to open the valve body 24 on the primary side. Supply the pressurized fire extinguishing water to the secondary side.

  In this state, the control unit 77 compares the secondary pressure P2 detected by the secondary pressure sensor 50 with a predetermined threshold pressure Pth preset as a target pressure of the sprinkler head 22, and is less than the threshold pressure Pth. In this case, by supplying current to the electromagnetic switching valve 52 and setting it as the second switching position 52b, the primary-side pressurized water obtained through the orifice 53 is supplied to the cylinder chamber 28, and the valve element 24 is stroked in the opening direction. , To increase the secondary pressure P2.

  On the other hand, when the secondary pressure P2 becomes equal to or higher than the threshold pressure Pth, the controller 77 turns off the solenoid switching valve 52 to return it to the first switching position 52a, and communicates the cylinder chamber 28 to the drainage pipe 34. Then, the valve body 24 is stroked in the closing direction by the force of the return spring 29, and the secondary pressure P2 is reduced.

  By such control by the control unit 77, pressure adjustment control is performed in which the extinguishing water supplied from the control valve device 10 to the sprinkler head 22 in operation is controlled to a constant pressure which becomes the threshold pressure Pth.

  Furthermore, when the automatic drainage valve 37 is connected in parallel with the drainage control valve 36 and the water spray head 94 is stopped by the closing drive of the control valve device 10, the automatic operation is performed when the secondary side pressure drops below a predetermined pressure. The drain valve 37 is opened to drain the extinguishing water accumulated in the secondary pipe.

  The other configurations and functions are the same as those of the embodiment shown in FIG. The points shown in FIGS. 2 to 4 are basically the same.

  When the control unit 40 provided in the control valve device 10 receives a water discharge instruction from the monitoring center or the like, the control valve device of the control valve device 10 is driven by the control of the electromagnetic switching valve 52 to perform preliminary discharge of small amount of water discharge. After that, two-stage water discharge control to switch to main pipe water discharge is performed by constant flow rate control or pressure regulation control.

  When the control unit 40 determines a predetermined inspection instruction, the control unit 40 performs the same inspection control shown in the flowchart of FIG. 7, but closes the test control water valve 92 before the inspection control and performs inspection In the operation test, the water spray head 94 does not discharge water into the tunnel.

[Constant flow control of two-stage water discharge]
FIG. 9 is a flow chart showing the two-step constant flow rate control of the control valve device that performs advance notice water discharge and full water discharge, and is control by the control unit 77 provided in the CPU 76 shown in FIG. 4.

  As shown in FIG. 9, when the controller 77 determines the water discharge start instruction from the monitoring center or the like in step S41, the controller 77 proceeds to step S42 and opens the valve disc 24 by turning on the electromagnetic switching valve 52.

  Subsequently, the controller 77 sets the threshold flow rate Qth1 of the preliminary discharge in step S43, and the opening degree A of the valve body 24 detected by the opening degree sensor 46 in the next step S44 is detected by the primary pressure sensor 48. The primary side pressure P1 and the secondary side pressure P2 detected by the secondary side pressure sensor 50 are read, and the process proceeds to step S45, and the capacity coefficient Cv corresponding to the opening degree A is read by referring to the capacity coefficient table 85 of the RAM 82. The differential pressure .DELTA.P is determined as .DELTA.P = P2-P1, and the flow rate Q is determined by calculation in accordance with the above (formula 2) in step S46.

  Subsequently, the control unit 77 proceeds to step S47 and compares the flow rate Q calculated in step S45 with the threshold flow rate Qth1 of the preliminary discharge set as the control target, and proceeds to step S48 if it is less than the threshold flow rate Qth1. 52 continues to be energized to open the valve body 24 to increase the flow rate Q. On the other hand, if it is the threshold flow rate Qth1 or more, the process proceeds to step S49 to deenergize the electromagnetic switching valve 52 to turn off the valve body 24. The process from step S44 is repeated until closing operation is performed to decrease the flow rate Q, and in step S50, it is determined that the predetermined time required for discharging the notice water has been discharged, and a small amount of water is discharged from the water spray head 94 in the tunnel. It warns drivers of passing vehicles in the tunnel that full-scale water discharge will take place, and urges measures such as stopping the vehicle.

  When the controller 77 determines in step S50 that the predetermined time required for the preliminary discharge is elapsed, the control section 77 proceeds to step S51, and changes the control target from the threshold flow Qth1 of the previous preliminary discharge to the threshold flow Qth2 of the full discharge more than that. The setting is changed, and constant flow control based on the threshold flow Qth2 is repeated in step S52 until the discharge stop instruction is determined in step S53, and full-scale water discharge is performed from the water spray head 94 into the tunnel by constant flow control controlled to the threshold flow Qth2. , Extinguish fires and protect tunnel bodies from fires.

  In the constant flow control based on the threshold flow rate Qth2 in step S52, as in steps S47 to S48, if the flow rate is less than the threshold flow rate Qth2, the valve body 24 is driven open to increase the flow rate Q, while the threshold flow rate Qth2 or more If there is, the valve body 24 is driven to close to reduce the flow rate Q.

  When the controller 77 determines the water discharge stop instruction in step S53, the process proceeds to step S54, and the valve body 24 is closed and closed to stop the water discharge from the water spray head 94.

[Two-stage water pressure regulation control]
FIG. 10 is a flow chart showing the two-step pressure regulation control of the control valve device that performs preliminary water discharge and full water discharge, and is control by the control unit 77 provided in the CPU 76 shown in FIG. 4.

  As shown in FIG. 10, when the controller 77 determines the water discharge start instruction from the monitoring center or the like in step S61, the controller 77 proceeds to step S62 and opens the valve disc 24 by energizing the electromagnetic switching valve 52.

  Subsequently, the controller 77 sets the threshold pressure Pth1 of the preliminary discharge water in step S63, reads the secondary pressure P2 detected by the secondary pressure sensor 50 in the next step S64, and proceeds to step S65 to control If it is less than the threshold pressure Pth1 of the preliminary discharge set as the target, if it is less than the threshold pressure Pth1, the process proceeds to step S66, the energization of the solenoid switching valve 52 is continued, the valve 24 is driven open, and the secondary pressure P2 On the other hand, if it is the threshold pressure Pth1 or more, the process proceeds to step S67, the energization of the electromagnetic switching valve 22 is turned off, the valve body 24 is closed and the secondary pressure P2 is decreased. The process from step S64 is repeated until it is determined that the predetermined time required for water discharge has elapsed, and a small amount of water is discharged from the water spray head 94 into the tunnel to notify the passing of water in the tunnel. For both of the driver or the like, and notice that the full-scale water discharge is performed, prompting the action of the vehicle is stopped and the like.

  When the controller 77 determines in step S68 that the predetermined time required for the preliminary discharge is elapsed, the control section 77 proceeds to step S69 and changes the control target from the threshold pressure Pth1 of the previous preliminary discharge to that before the threshold pressure Pth2 for full discharge higher than that. The setting is changed, and the pressure adjustment control based on the threshold pressure Pth2 is repeated in step S70 until the water discharge stop instruction is determined in step S71, and the water spray head 94 performs full water discharge into the tunnel by pressure adjustment control controlled to the threshold pressure Pth2. , Extinguish fires and protect tunnel bodies from fires.

  In the pressure adjustment control based on the threshold pressure Pth2 in step S70, as in steps S65 to S67, if it is less than the threshold pressure Pth2, the valve body 24 is driven open to raise the secondary pressure P2, while the threshold pressure If Pth2 or more, the valve body 24 is driven to close to lower the secondary pressure P2.

  When the controller 77 determines the water discharge stop instruction in step S71, the process proceeds to step S72, and the valve body 24 is closed and closed to stop the water discharge from the water spray head 94.

[Modification of the present invention]
(Control valve device)
Although the above-mentioned embodiment exemplifies the control valve apparatus used for sprinkler fire extinguishing equipment and tunnel water spray equipment, it is not limited to this, but needs flow control or pressure control generally used for plant equipment etc. Includes control valve equipment for appropriate equipment.

(Control switching valve)
Although the above embodiment is provided with a switching control valve for two-position switching to open and close the control valve device, it may be a three-way switching valve that switches the primary side port A and the secondary side port C to the cylinder port B .

(Sensor)
Although the above embodiment is provided with the opening degree sensor, the pressure sensor on the primary side and the secondary side, and the contact sensor to control the control valve device, other appropriate sensors such as a vibration sensor and a strain sensor may be used. It may be provided to perform control of the control valve device and status monitoring.

(Transmission to worker terminal by short distance communication)
Further, in the above embodiment, since the control unit is provided with the wireless weir deep portion, the detected opening degree of the opening sensor, the detected pressure of the primary side pressure sensor and the secondary side pressure sensor, the flow rate calculated by the control unit May be transmitted to a portable terminal possessed by the worker by the wireless communication unit for processing. In this way, when the field work such as repair replacement or adjustment is performed at the site where the control valve device is installed, or while patrolling the site, the operator detects the opening degree of the control valve device by the display of the portable terminal, the primary side pressure, The pressure on the secondary side and the amount of control water can be known, and the operation state of the control valve device can be determined appropriately, and maintenance and management of the facility can be advanced efficiently with high accuracy.

(Controller unit)
Also, at the time of inspection, for example, a signal connection unit is provided on the output side of the wired communication unit in order to confirm whether the signal indicating the inspection result is reliably output from the control unit provided in the control valve device to the outside If inspection control is performed by inserting a jig, it is possible to confirm inspection normality by the output of a signal with a jig with a memory without outputting a predetermined signal to the monitoring center.

  In addition, when the jig with memory is removed, the signal connection section that has been cut off is connected, and if there is a problem with the signal line, the signal line monitoring circuit can identify disconnection or short circuit etc. , Normality of the output system of the signal to the outside can be confirmed.

(Others)
Further, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above-described embodiment.

10: Control valve device 12: Device body 14: Inlet 16: Outlet 18: Primary side piping 19: Gate valve 20: Secondary side piping 21: Water flow detection device 22: Sprinkler head 24: Valve body 25: Piston 26: Cylinder 27: guide rod 28: cylinder chamber 29: return spring 30: valve seat 31: partition member 32: cylinder inflow discharge port 33: valve seat 34: drainage pipe 36: drainage control valve 38: case cover 40: control unit 46 : Opening degree sensor 48: primary side pressure sensor 50: secondary side pressure sensor 52: electromagnetic switching valve 52a, 52b: switching unit 54: electromagnetic solenoid 55: spring 60: display unit 62: operation unit 64: contact unit 66: sensor 66: sensor Body 68: conductive rubber 70, 72: electrode 74a, 74b: lead wire 75: control processor 76: CPU
77: Control unit 78: Control logic 80: ROM
82: RAM
84: bus 85: capacity coefficient table 86: wireless communication unit 90: wired communication unit

Claims (17)

In a control valve device that opens and closes a valve body from a drive mechanism and supplies liquid supplied from the primary side to the secondary side,
An opening sensor that detects the opening of the valve body;
A pressure sensor comprising a primary pressure sensor for detecting the primary pressure of the valve body and a secondary pressure sensor for detecting the secondary pressure;
The flow rate from the primary side to the secondary side is determined based on the differential pressure between the volume coefficient corresponding to the valve opening degree, the primary side pressure and the secondary side pressure, and the valve body is opened and closed by control of a piston cylinder mechanism. A control unit to drive;
The control valve apparatus characterized by the above-mentioned.
2. The control valve device according to claim 1, wherein the control unit comprises a computer circuit including a CPU, a memory, an input / output port, a display unit, and an operation unit, and the function of the control unit is predetermined by the CPU. A control valve device realized by executing a program.
The control valve device according to claim 2, wherein the control unit further includes a communication unit, and the detection opening degree of the opening degree sensor, the detection pressure of the primary side pressure sensor and the secondary side pressure sensor, the control The control valve apparatus characterized in that the communication amount calculated by the unit is transmitted to an external host apparatus by the communication unit.
The control valve device according to claim 2, wherein the control unit further includes a communication unit, and the detection opening degree of the opening degree sensor, the detection pressure of the primary side pressure sensor and the secondary side pressure sensor, the control A control valve device characterized in that the flow rate calculated by the unit is transmitted to a portable terminal owned by a worker by the communication unit and processed.
The control valve device according to claim 1
The control unit performs constant flow control to control the flow rate of the liquid supplied to the secondary side to a predetermined set flow rate, or regulates the pressure of the liquid supplied to the secondary side to a predetermined set pressure Control valve apparatus characterized by performing pressure control.
The control valve device according to claim 1
The valve body is supported so as to be openable and closable by axial movement of a valve shaft,
The control valve device, wherein the opening degree sensor is a linear detector that detects the amount of movement of the valve shaft.
The control valve device according to claim 1
A differential pressure sensor that introduces the primary side pressure and introduces the secondary side pressure instead of the pressure sensor, and outputs a differential pressure detection signal according to the primary side pressure, the secondary side pressure, and a differential pressure The control valve apparatus characterized by providing.
The control valve device according to claim 1, wherein the opening sensor and the pressure sensor have a MEMS structure.
In the control valve device according to claim 1, further,
The seat provided on the valve body or the valve seat is provided with a contact sensor for detecting a load applied when the valve body is seated on the valve seat,
The control unit determines and reports closing and opening of the valve body, dust biting of the valve body, and scratches or deterioration of the sheet based on the load detected by the contact sensor. Control valve device.
The control valve device according to claim 9,
The contact sensors are provided at a plurality of places on the sheet,
The control unit
When all the loads detected by the plurality of contact sensors are equal to or less than a predetermined opening threshold value, it is determined that the valve body is open,
When all the detected loads by the plurality of contact sensors are equal to or more than a predetermined closing threshold value and within a predetermined load range, it is determined that the valve body is closed.
It is characterized in that when all detected loads by the plurality of contact sensors are equal to or greater than a predetermined closing threshold and a part of detected loads exceeds the load range, it is determined that the valve body is bitten by dirt, scratches or deterioration. Control valve device.
11. The control valve device according to claim 9, wherein the contact sensor changes its resistance value according to a pressure load of the valve body.
The control valve device according to claim 1
Furthermore, a drainage control valve is provided to drain water from the secondary side of the valve body,
When the control unit receives a predetermined inspection instruction, the control unit controls the flow rate of the liquid supplied to the secondary side to a predetermined set flow rate in a state in which the drainage control valve is opened and controlled, or The pressure adjustment control is performed to control the pressure of the liquid supplied to the secondary side to a predetermined set pressure, and the detection opening degree of the opening degree sensor, the primary side pressure sensor, and the secondary side pressure sensor A control valve that measures a detected pressure, a detected load of the contact sensor, and calculates the flow rate by the control unit, and reports an inspection abnormality when an abnormality is determined from the measurement result and the calculation result. apparatus.
The control valve device according to claim 12, wherein the control unit, when receiving a predetermined inspection instruction, causes the valve body to open and close between a fully open position and a fully closed position, and the opening degree sensor A fluid detection device characterized by judging and notifying the appropriateness of the movement of the valve body from the temporal change of the detected degree of opening of the valve body.
The control valve device according to claim 12.
A control valve device characterized in that a test control valve that is closed at the time of inspection is provided in the piping on the secondary side of the valve body.
The control valve device according to claim 1, wherein the control unit stores and manages in advance management information of predetermined main constituent devices including the valve body, the opening degree sensor and the pressure sensor. Control valve device.
The control valve device according to claim 15, wherein the control unit manages a replacement time of the main component equipment and notifies that the replacement time has come.
In a control valve device that opens and closes a valve body by a piston cylinder mechanism,
A contact sensor for detecting a load applied to the valve body or a seat provided on the valve seat when the valve body is seated on the valve seat;
A control unit that determines and notifies closing and opening of the valve body, dust biting of the valve body, and scratches or deterioration of the sheet based on the load detected by the contact sensor;
The control valve apparatus characterized by the above-mentioned.

Images