JP2008176774A - Control valve and piping network remote monitoring control system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control valve easily installed, requiring little time and labor for adjustment and maintenance, and to provide a piping network remote monitoring control system using it. <P>SOLUTION: This control valve 10 has a first piping connection part 170, a second piping connection part 170A, and a piping 110, and a valve element 120 for controlling a flow rate of a fluid is disposed in an approximate middle of the piping. A first pressure sensor 140 is installed on the upstream side of the valve element in the piping, and a second pressure sensor 150 is installed on the downstream side. A valve element drive device 130 is installed above the valve element such that the valve element can be opened and closed through a driving shaft 134. The control valve 10 is integrally equipped with a controller 200 controlling and calculating a drive amount of the valve element based on detection data from the first pressure sensor and the second pressure sensor. By use of the control valve 10, the piping network remote monitoring control system can be constructed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a control valve and a pipe network remote monitoring and control system using the control valve, and more particularly to a control valve for arbitrarily controlling the flow rate or pressure of fluid in water flowing through the pipe network and a pipe network remote control using the control valve. The present invention relates to a supervisory control system.

  A conventional fluid control device is composed of a single valve and a single sensor. That is, when controlling the flow rate and pressure of fluid in the piping network, a sensor such as a flow sensor or a pressure sensor having a single function is installed at a location different from the valve for the valve installed in the piping network. The fluid is controlled based on signal values such as flow rate and pressure obtained from these.

  For example, as a conventional fluid control device, the measurement data of one pressure sensor is used to prevent the back flow of the fluid in the piping, and the downstream side of the valve is different from the installation location of the valve. There is a sensor provided with a pressure sensor (for example, Patent Document 1). According to the conventional fluid control device, the value of the pressure signal measured by the pressure sensor is compared with a predetermined pressure signal, so that the valve is fully closed before the back flow is reached. It is said that fluid control can be performed to prevent back flow from downstream to upstream.

Japanese Patent Laid-Open No. 5-270402

  However, in such a conventional fluid control device, only one pressure signal detected on the downstream side or upstream side of the valve is used for fluid control. Therefore, in order to perform advanced control such as measuring the flow rate, flow velocity, pressure, and flow direction in the piping network and performing other controls such as prevention of backflow more precisely in real time, a flow meter, pressure gauge, There is a problem that separate installation of a pressure control valve, a flow control valve, an on-off control valve, a backflow prevention valve, an emergency shut-off valve, a water hammer absorber, etc. is required. In addition, when installing a conventional fluid control device, it is necessary to install control devices and sensors according to the valve and control purposes at different locations from the valve, and set the control conditions based on the installation status. There is a problem that installation cost and labor are high. Furthermore, since the installation location of the valve and the installation location of the control device or sensor are different, there is a problem that it takes time and cost to install, adjust, and maintain them.

  As described above, in the conventional fluid control device, the valve, the control device, and the sensor are configured to perform their functions in a state where they are individually installed, so that a failure of the valve as the fluid control device can be prevented. The diagnostic function could not be obtained, and only a slight abnormality in the functions of the control device and the sensor itself was recognized. Accordingly, remote operations such as diagnosis of piping network breakage and emergency closing of necessary parts of the pipe network due to breakage have not been desired.

  Also, if you want to monitor and control the flow rate, flow velocity, pressure and flow direction in the piping network, a special control program is tailored to the status of the piping network and the individual installed devices installed in the piping network. There is a problem that the cost is high and it takes time.

  The present invention has been made in view of the above-described various problems, and an object thereof is a fluid control device in which a valve, a sensor, a drive device, and a control device (including an arithmetic device and a communication device) are integrally formed. A control valve that is easy to install, requires little effort for adjustment and maintenance, and constantly measures the fluid pressure before and after the valve, and monitors and controls the difference from any set value. It has fluid control functions such as constant flow control, constant pressure control, water hammer prevention, backflow prevention, emergency shut-off, etc., and self-diagnosis of valve failure or prediction of failure occurrence is possible. It is to provide a control valve that does not require new creation. Another object of the present invention is to provide a pipe network remote monitoring and control system capable of monitoring, diagnosing and controlling a control valve with an external terminal such as a personal computer using a communication means, and further capable of monitoring, diagnosing and controlling the piping network. .

  The control valve according to claim 1 is a pipe, a valve body disposed substantially in the middle of the pipe, valve body driving means for electrically driving the valve body, and between one end of the pipe and the valve body. A first pressure sensor disposed, a valve including a second pressure sensor disposed between the other end of the pipe and the valve body, and detection data from the first pressure sensor and / or the second pressure sensor. And a control valve having a control means having a function of controlling the valve body driving means by calculating the driving amount of the valve body, the pipe, the valve body, the first pressure sensor, the second A control valve is characterized in that the pressure sensor and the valve body driving means are integrally formed, and water flow resistance means is provided between the first pressure sensor and the second pressure sensor.

  The control valve according to claim 2 is the control valve according to claim 1, wherein the control means is formed integrally with the control valve.

  In the control valve according to the third aspect, the valve body has a valve body structure of a ball valve or a gate valve, and the water flow resistance means is in the pipe and is between the first pressure sensor and the second pressure sensor. 3. The control valve according to claim 1, further comprising an orifice portion provided.

  As described above, since the fluid resistance portion is provided between the first pressure sensor and the second pressure sensor, the pressure difference between the pressure at the position of the first pressure sensor and the pressure at the position of the second pressure sensor is increased. The flow rate is clearly understood.

  The control valve according to claim 4, wherein the first pressure sensor is configured such that the inner surface of the pipe, the first pressure measurement surface of the first pressure sensor, and the second pressure measurement surface of the second pressure sensor form the same surface. The control valve according to any one of claims 1 to 3, wherein the second pressure sensor and the second pressure sensor are attached to the pipe.

  In the control valve according to claim 5, the valve body has a valve body structure of a ball valve having a through hole formed in the axial direction of the pipe, and the through hole has a diameter at one end and a diameter at the other end. The control valve according to any one of claims 1, 2, and 4, wherein the through holes constitute water flow resistance means.

  A piping network remote monitoring and control system according to a sixth aspect is a piping network remote monitoring and controlling system in which a piping network is configured by using a single or a plurality of control valves according to any one of the first to fourth aspects. The control means includes communication means for acquiring data from the control means of a single or a plurality of control valves via a wireless line or a public line using the communication means and remotely monitoring the state of the control valve. A function to display the acquired data, a function to optimally set various control data to one or more control valves based on the acquired data, and a function to remotely control one or more control valves based on the acquired data A remote monitoring and control system for a piping network, comprising:

  According to the control valve of the first aspect, the pipe, the first pressure sensor, the second pressure sensor, and the valve body driving device are integrally formed around the valve body, and the first pressure sensor and the first pressure sensor Since it has a control means to control the valve body drive device by calculating the drive amount of the valve body based on the detection data of the two pressure sensors, constant flow control, constant pressure control, water hammer prevention, backflow prevention, emergency shutoff It is possible to perform fluid control such as that, installation is easy, and there is an effect that adjustment and maintenance are not troublesome. In addition, it is not necessary to create a new control program in accordance with the positional relationship and installation state of valves and sensors. In addition, the detection values of the first pressure sensor and the second pressure sensor are recorded in the data logger, and compared with the current value, the control valve functions normally, and the diagnosis of whether the fluid is flowing normally It is possible to predict the occurrence of valve failure and perform self-diagnosis. Further, since the water flow resistance means is provided between the first pressure sensor and the second pressure sensor, the difference in the detected pressure by each sensor becomes clearer, and the measurement accuracy such as the flow rate is improved.

  According to the control valve of the second aspect, in addition to the effect of the first aspect, since the control means is formed integrally with the control valve, the control valve 10 becomes more compact.

  According to the control valve of the third aspect, in addition to the effect of the first or second aspect, an orifice as a fluid resistance means provided in the pipe and between the first pressure sensor and the valve body. Therefore, even if the valve body is a full-bore type valve such as a ball valve or gate valve with little pressure loss when fully opened, the difference between the detected pressures of the first pressure sensor and the second pressure sensor becomes large, and the flow rate becomes clear. There is an effect of understanding.

  According to the control valve of the fourth aspect, in addition to the effect of any one of the first to third aspects, the first pressure sensor and the second pressure sensor are arranged so as not to obstruct the water flow in the pipe. Therefore, the occurrence of turbulence and cavitation in the pipe can be prevented, and a more accurate measurement value can be obtained.

  According to the control valve of the fifth aspect, in addition to the effect of any one of the first, second and fourth aspects, the through hole constitutes the water flow resistance means. Therefore, there is an effect that the difference in detected pressure between the first pressure sensor and the second pressure sensor is increased without requiring an orifice portion and the flow rate can be clearly understood.

  According to the piping network remote monitoring and control system according to claim 6, in addition to the effect of the control valve according to any one of claims 1 to 5, a single unit is provided via a wireless line or a public line using communication means. Or, since it has a function to acquire and display data of multiple control valves, it is possible to remotely control the flow rate, pressure, and flow direction of fluid in a single or multiple control valves installed in a piping network by a remote monitoring control device. Monitoring is possible. In other words, it is possible to remotely determine whether each control valve is functioning normally, and to determine whether a piping network in which a single or a plurality of control valves are installed is functioning normally. There is an effect that can be done remotely. As a result, for example, in the event of a natural disaster or accident, the affected area in the piping network can be found quickly, and the control valve at the affected area can be closed urgently, or the affected piping can be bypassed to determine normal piping. -It is effective in securing lifelines in the event of disasters, such as being able to supply emergency fire-fighting water and drinking water using the specified normal piping.

  The above-described object, other objects, features, and advantages of the present invention will become more apparent from the following description of the best mode for carrying out the invention with reference to the drawings.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view of a control valve according to a first embodiment of the present invention, and a configuration diagram including a control device and a remote monitoring control device. The control valve 10 includes a valve 100 and a control device (control means for the valve body driving device 130) 200, and the valve 100 and the control device 200 are integrally formed. Further, as will be described later, by providing the control device 200 with a communication function, the remote monitoring control device 250 is connected via a wireless line or a public line, for example.

  The valve 100 has a cylindrical pipe 110, and a valve body 120 for adjusting the flow rate of the fluid is disposed substantially in the middle of the pipe 110. The valve body 120 is formed in a spherical shape having a diameter larger than at least the inner diameter of the pipe 110, and a through hole 122 having a diameter substantially the same as the inner diameter of the pipe 110 is oriented in the same direction as the pipe 110. Is provided. As such a valve body 120, for example, a valve body of a ball valve is used.

  A valve body driving device 130 is attached to the upper part of the valve body 120.

  The valve body driving device 130 includes a driving means 132, a cylindrical portion 134, a driving shaft 136, and a bearing 138. A driving unit 132 is disposed on the upper part of the valve body driving device 130. For example, a geared motor is used as the driving unit 132. And the lower part of the drive means 132 and the upper end part of the cylinder part 134 are connected. Subsequently, the lower end portion of the cylindrical portion 134 is connected to the pipe 110 in a vertical direction. Inside the cylindrical portion 134, a drive shaft 136 is rotatably disposed in a state supported by a bearing 138. Moreover, the upper end part of the drive shaft 136 and the geared motor in the drive means 132 are connected, and the lower end part of the drive shaft 136 and the upper part of the valve body 120 are connected. Therefore, when the geared motor of the driving means 132 in the valve body driving device 130 rotates, the valve body 120 can be rotated via the drive shaft 136, and as a result, the opening / closing control of the valve 100 can be performed.

  A circular flange-shaped first pipe connecting portion 170 is formed at one end of the pipe 110, and a circular flange-shaped second pipe connecting portion 170A is formed at the other end of the pipe 110, respectively. A plurality of attachment holes 172 and attachment holes 172A are provided in the circumferential direction so that bolts and the like can be inserted in the 170 and the second pipe connection portion 170A to connect the pipes. The first pressure sensor 140 is attached to the upstream side of the valve body 120 in the pipe 110, that is, the first pipe connection portion 170 side, and the second pressure sensor 150 is attached to the downstream side of the valve body 120.

  The first pressure sensor 140 and the second pressure sensor 150 are attached at substantially equal intervals around the valve body 120, respectively. The first pressure sensor 140 is attached at a substantially middle position between the valve body 120 and the first pipe connection part 170, and the second pressure sensor 150 is a substantially middle position between the valve body 120 and the second pipe connection part 170A. However, these are not necessarily in the intermediate position. In addition, at the attachment position of each pressure sensor in the pipe 110, a first indentation part 114 and a second indentation part 116 having a size to which these pressure sensors are attached are formed.

  Here, as a pressure sensor used for the first pressure sensor 140 and the second pressure sensor 150, for example, a pressure sensor using an organic / inorganic nano rubber pressure sensor is used. This pressure sensor has a feature that the electric resistance changes very sensitively and linearly according to the external pressure, and a feature that the sensor can be formed compactly. The pressure sensor is not limited to the organic / inorganic nano rubber pressure sensor, and may be another pressure sensor having an equivalent function.

  In addition, the first recess 114 and the first pressure measurement surface 142 and the second pressure measurement surface 152 of the first pressure sensor 140 and the second pressure sensor 150 form the same surface as the inner surface 112 of the pipe 110. The first pressure sensor 140 and the second pressure sensor 150 are disposed in the second recess 116. For this reason, the first pressure sensor and the second pressure sensor are arranged so as not to interfere with the water flow in the pipe, so that the occurrence of turbulent flow and cavitation in the pipe can be prevented. Is obtained.

  In the pipe 110 between the first pressure sensor 140 and the valve body 120 in the pipe 110, an orifice part 160 is provided as a water flow resistance part (water flow resistance means), and the size of the inner diameter of the pipe 110 (the cross-sectional area of the pipe). ) Is partially reduced. The distance between the position where the orifice portion 160 is provided and the position where the second pressure sensor 150 is arranged is large enough that the differential pressure between the first pressure sensor 140 and the second pressure sensor 150 can be determined clearly. An interval is secured. Furthermore, in the piping 110, the position where the orifice portion 160 is provided is away from the mounting position of the second pressure sensor 150 in order to minimize the influence of turbulent flow and two-layer flow on the second pressure sensor 150. Is desirable.

  As described above, the control valve 10 includes the first piping connection portion 170, the second piping connection portion 170A, the piping 110, the valve body 120, the first pressure sensor 140, the second pressure sensor 150, the valve body driving device 130, and the control device. 200 is integrally formed. The control valve 100 and the control device 200 may be separated from each other. However, when the control valve 100 and the control device 200 are integrated, the control valve 10 becomes more compact.

  The control device 200 acquires the pressure measurement data 140a and 150a measured by the first pressure sensor 140 and the second pressure sensor 150, and the drive amount to drive the valve body 120 based on the pressure measurement data 140a and 150a. Is calculated, and the calculated data is transmitted to the valve body driving device 130. In addition, the set differential pressure and the pressure value to be compared when calculating the driving amount are stored as data stored in the database of the control device 200.

  When the respective pressure measurement data 140a and 150a measured by the first pressure sensor 140 and the second pressure sensor 150 are acquired by the control device 200, the control device 200 uses the analog that is the acquired pressure measurement data 140a and 150a. Data is converted into digital data by A / D conversion. Further, the converted digital data is converted into a pressure value, and then a differential pressure is obtained based on each pressure value. Then, the flow rate in the pipe is calculated based on the data stored in the database from the obtained differential pressure.

  In the control device 200, the drive amount data 200a of the valve body 120 to be driven by the valve body driving device 130 is calculated based on the comparison between the calculated differential pressure data and preset differential pressure data. Then, the calculated drive amount data 200 a is transmitted from the control device 200 to the valve body drive device 130. The valve body driving device 130 drives the valve body 120 based on the transmitted drive amount data 200a to ensure a necessary flow rate. Here, in order to keep the secured flow rate constant, when the differential pressure data calculated is lower than the set differential pressure data, the valve body 120 is opened because the flow rate is insufficient, that is, the piping 110. And the through hole 122 are driven in a direction in which the directions of the axial centers coincide with each other. Further, when the calculated differential pressure data is higher than the set differential pressure data, the valve body 120 is closed because the flow rate is excessive, that is, the direction of the axial center of the pipe 110 and the through hole 122 is vertical. Drive in the direction. At the same time, critical braking is performed to stabilize the operation.

  Further, when the pressure value measured by the second pressure sensor 150 becomes larger than the pressure value measured by the first pressure sensor 140, that is, when the obtained differential pressure value becomes a negative value. The control device 200 determines that the flow in the pipe 110 is flowing backward from the downstream side to the upstream side. In this case, the driving amount data 200a is transmitted from the control device 200 to the valve body driving device 130 so as to drive the valve body 120 of the valve 100 to be closed in order to prevent backflow.

  The remote monitoring control device 250 has data acquired by the control device 200 of the single or plural control valves 10, a function of acquiring via a wireless line or a public line using a communication means, and a function of displaying. In addition, since it has a function of performing calculation based on the acquired data and transmitting data necessary to individually drive the valve body driving device 130 of the single or plural control valves 10, the single or plural It is possible to remotely control the control valves 10 respectively.

  In addition, you may make it provide the function to display data in a personal computer or a portable terminal. Further, the remote monitoring control device 250 may have a function of optimally setting various control data for the single or plural control valves 10 based on the acquired data.

  Hereinafter, the control flow of the control device in the present embodiment will be described in detail.

  FIG. 2 shows a control flow of this embodiment accompanying measurement by the first pressure sensor 140. When measurement data is sent from the first pressure sensor 140 and the second pressure sensor 150 to the control device 200, the control device 200 determines the flow direction of the water flow of the control valve 10 from the magnitude of the measurement data. That is, when the measurement data of the first pressure sensor 140 is larger than the measurement data of the second pressure sensor 150, the first pressure sensor 140 side is determined to be upstream. Thus, when the water flow is flowing in the direction from the first pressure sensor 140 to the second pressure sensor 150 (the water flow is positive) (YES in S1), the measurement value of the first pressure sensor 140 is a certain time: Sampled every T (S2).

  Conversely, when the water flow is flowing in the direction from the second pressure sensor 150 to the first pressure sensor 140 (NO in S1), the outlet pressure is measured with the first pressure sensor 140 as the downstream side (S31, FIG. 3). ).

  The sampled measurement value is A / D converted and subsequently converted to a pressure value (S3). Then, the pressure value: AP measured by the first pressure sensor 140 is obtained and recorded (S4). Subsequently, the pressure difference value ΔP for each sampling is obtained (S5). This is because the change amount of the pressure value measured by the first pressure sensor 140 per set time is calculated.

  Here, first, a comparison is made between ΔPdn (S6) and ΔP, which are set time: pressure drop limit value per T (S7). When ΔP <ΔPdn (S8), it is determined that the pressure is rapidly decreasing (S9), and the valve body is driven from the control device 200 so that the opening degree of the valve body 120 is maintained for a certain time: Ta. A command is issued to the device 130 (S10).

  Further, a comparison is made between ΔPup (S11) and ΔP which are set time: T pressure increase limit value per T (S12). When ΔP> ΔPup (S13), it is determined that the pressure is rapidly increasing (S14), and the valve body is driven from the control device 200 so that the opening degree of the valve body 120 is maintained for a certain time: Ta. A command is issued to the device 130 (S15).

  Further, when ΔP ≧ ΔPdn (S16) or ΔP ≦ ΔPup (S17), that is, when ΔP and ΔPdn are substantially equal, it is determined that the pressure is stable (S18), and the current state of the valve is maintained. (S19).

  Further, in parallel with the above processing, the pressure value measured by the first pressure sensor 140: AP (S4) detects a decrease in the pressure of the pipe 110, and the set descent limit set value: APdn (S20). And a comparison is made. Then, as a result of measurement so that AP ≦ APdn (S21), it is determined that the lower limit set value is reached (S22), and the control device 200 is closed so as to close the valve body 120 in order to prevent backflow. A command is issued to the valve body driving device 130 (S23).

  Further, the command from the control device 200 to the valve body driving device 130 for the valve body 120 generated by the control flow in the first pressure sensor 140 has priority over the command generated by the control flow by the second pressure sensor 150 described below. To be controlled. This is because of the accident prevention function of the control valve 10.

  FIG. 3 shows a control flow of the present embodiment accompanying measurement by the second pressure sensor 150.

  As described above, when the measurement data is sent from the second pressure sensor 150 to the control device 200 together with the measurement data of the first pressure sensor 140, the water flow flows from the first pressure sensor 140 toward the second pressure sensor 150. If it is determined that the water pressure is positive (YES in S30), the measured value of the second pressure sensor 150 is sampled every fixed time: T (S31). Conversely, if it is determined that the water flow is flowing from the second pressure sensor 150 toward the first pressure sensor 140 (NO in S30), the second pressure sensor 150 measures the inlet pressure as the upstream side ( S2, FIG. 2). The sampled measurement value is A / D converted and subsequently converted into a pressure value (S32). Then, the pressure value BP measured by the second pressure sensor 150 is obtained and recorded (S33).

  Here, in this embodiment, the control can be performed by switching between the constant flow control and the constant water pressure control. First, the constant flow control will be described.

  First, when the pressure value BP measured by the second pressure sensor 150 is recorded, the pressure value measured by the first pressure sensor 140: differential pressure from the AP: DP is obtained (S34). This is to calculate the flow rate passing through the control valve 10.

  Subsequently, a comparison is made with a differential pressure setting value: DPdef (S35) set to obtain a desired flow rate (S36). This differential pressure set value: DPdef is used for the flow rate control.

  When DP <DPdef (S37), it is determined that the flow rate is less than the desired amount (S38), and the control device 200 instructs the valve body driving device 130 to open the valve body 120 for a certain time: Td. Is issued (S39). When DP = DPdef (S40), it is determined that the flow rate is a desired amount (S41), and the control device 200 is configured so that the opening degree of the valve body 120 is maintained for a certain period of time: Td. A command is issued to the valve body driving device 130 (S42).

  Further, when DP> DPdef (S43), it is determined that the flow rate is larger than the desired amount (S44), and the control device 200 causes the valve body drive device 130 to close so that the valve body 120 is closed for a certain time: Td. Command is issued (S45).

  Next, constant water pressure control will be described. First, the pressure value BP measured by the second pressure sensor 150 is compared with the set desired pressure value Pconst (S51). In the case of BP <Pconst (S52), it is determined that the pressure is lower than the desired pressure (S53), and for a certain period of time: Tb, the control device 200 opens the valve body driving device 130 so that the valve body 120 opens. A command is issued (S54). When BP = Pconst (S56), it is determined that the pressure is stable (S56), and the valve body 120 is controlled from the control device 200 so that the opening degree of the valve body 120 is maintained for a certain period of time: Tb. A command is issued to the drive device 130 (S57). Furthermore, when BP> Pconst (S58), it is determined that the pressure is higher than the desired pressure (S59), and the control device 200 causes the valve body drive device 130 to close so that the valve body 120 is closed for a certain period of time: Tb. A command is issued (S60).

  FIG. 4 shows a control flow of the present embodiment for the I / O controller constituting the control device 200. When the valve body driving device 130 is instructed to drive the valve body 120 according to the flow of FIGS. 2 and 3 described above, the I / O controller (S70) constituting a part of the control device 200 controls the valve. Drive amount data is transmitted to the body drive device 130, and the valve body 120 is controlled (S71). In addition, the I / O controller records the measured value of the first pressure sensor 140, the measured value of the second pressure sensor 150, and the log data of the command data related to the driving of the valve body 120 to the valve body driving device 130. (S72). This log data is recorded as an operation record, and is used, for example, for analysis when an abnormality occurs (S73). Further, in the I / O controller, if the opening command or the closing command for the valve body 120 continues for an abnormal setting time or longer, it is regarded as abnormal (S74), and then an abnormality notification is made (S75).

  In this control valve 10, since the first pressure sensor 140 and the second pressure sensor 150 are arranged on the upstream side and the downstream side of the piping 110 of the valve 100 with the valve body 120 interposed therebetween, the respective pressure measurement data 140a. , 150a can be used to calculate the flow rate from the differential pressure obtained. Further, by comparing the calculated differential pressure data with a preset value of the differential pressure, it is possible to control the flow rate to be constant in the pipe.

  Further, the pressure on the secondary side of the valve 100 is controlled by driving the valve body 120 of the valve 100 so that the pressure value obtained from the pressure measurement data 150a measured by the second pressure sensor 150 is constant. Can be controlled to maintain a constant pressure. Therefore, in the piping system on the downstream side of the valve, it is possible to ensure a pressurized state of a certain pressure or less.

  Furthermore, since the orifice part 160 is formed between the first pressure sensor 140 and the valve body 120, the pressure difference between the hydraulic pressure in the first pressure sensor 140 and the dynamic pressure in the second pressure sensor 150 is increased. Therefore, the differential pressure can be clearly obtained from the pressure measurement data 140a and 150a measured by the first pressure sensor 140 and the second pressure sensor 150, so that the flow rate can be calculated with higher accuracy. Further, when the calculated differential pressure value changes from positive to negative, the control device 200 determines that the flow in the pipe 110 may flow backward from the downstream side to the upstream side. Since control can be performed so that the valve body 120 is closed, control for preventing a backflow in the fluid is also possible. Further, by comparing the magnitudes of the pressure values calculated from the first pressure sensor 140 and the second pressure sensor 150 as described above, it is possible to grasp the flow direction in the pipe 110.

  Further, the control device 200 is integrally formed with the first piping connection portion 170, the second piping connection portion 170A, the piping 110, the valve body 120, the first pressure sensor 140, the second pressure sensor 150, and the valve body driving device 130. Therefore, it is possible to install various sensors such as a pressure sensor necessary for controlling the water flow only by installing only the control valve 10, and the initial cost is greatly reduced. Further, since the maintenance locations of the pressure sensor are gathered in the same location as the control valve 10, the time and cost for maintenance are reduced, and the reliability of the apparatus is improved.

  Further, since the remote monitoring control device 250 has a function of acquiring and displaying data in the single or plural control valves 10 through a wireless line or a public line, the flow rate of the fluid in the single or plural control valves 10 is displayed. Remote centralized monitoring of pressure and flow direction, etc. is possible. Further, it is possible to set control data for a single or a plurality of control valves 10. Therefore, based on the set control data, the valve body driving means of the single or plural control valves 10 can be centrally controlled. By installing the control valve 10 in the piping network, damage can be caused by natural disasters or accidents. As soon as the affected piping location is found, the control valve 10 at the disaster location is closed, and on the contrary, normal piping that bypasses the damaged piping is identified, and this is used to supply emergency fire-fighting water and drinking water. Can be made possible.

  In the control valve 10, the first pressure measurement surface 142 and the second pressure measurement surface 152 of the first pressure sensor 140 and the second pressure sensor 150 disposed in the pipe 110 form the same surface as the inner surface 112 of the pipe 110. Thus, since it is arranged so as not to interfere with the water flow in the pipe, the occurrence of turbulence and cavitation due to the installation of the pressure sensor is prevented, and a more accurate measurement value can be obtained.

  In addition, the remote monitoring control device 250 records each pressure value obtained from the pressure measurement data 140a and 150a measured by the first pressure sensor 140 and the second pressure sensor 150 as log data in time series. It is possible to detect the time-series change state of the pressure values of the first pressure sensor 140 and the second pressure sensor 150. Further, based on the time-series log data of the recorded pressure value, for example, by determining the rate of change of the pressure value per unit time, when the value of the rate of change becomes greater than a certain set value, It is possible to diagnose that some abnormality has occurred in the operating state of the valve 100. Thus, by making it possible to monitor the operating state of the valve 100, it is possible to replace the valve 100 before it breaks down, and it is possible to prevent accidents.

  Further, in the log data of the pressure value obtained from the pressure measurement data 140a measured by the first pressure sensor 140, when a pressure increase is detected during the closing operation of the valve 100, the valve 100 is detected in advance when the pressure suddenly changes. It is possible to prevent the water hammer effect by controlling the valve body 120 so as to extend the closing time.

  Furthermore, in the log data of the pressure value obtained from the pressure measurement data 140a measured by the first pressure sensor 140, when the pressure drop during the opening operation of the valve 100 is detected, the valve 100 is detected in advance when the pressure suddenly changes. It is also possible to prevent a sudden pressure drop in the pipe by controlling the valve body 120 so as to extend the opening operation time.

  Note that these controls can be achieved not only by the remote monitoring control device 250 but also by the control device 200.

  Next, a water storage device using a control valve according to the first embodiment of the present invention will be described with reference to FIG.

  The water storage device 12 shown in FIG. 5 is obtained by adding the water pipe 300, the water storage tank 400, and the third pressure sensor 410 as components except for the remote monitoring control device 250 from the embodiment of FIG. Further, the control device 200 in the embodiment of FIG. 1 is configured as an A / D conversion device 202, an arithmetic device 204, and an opening control device 206 in FIG. 5, which are integrally attached to the valve 100. However, it may be a separate body.

  The water supply pipe 300 is connected using a bolt or the like at the second pipe connection portion 170 </ b> A on the downstream side of the valve 100, and is provided to supply water to the water storage tank 400. The water storage tank 400 has a function of temporarily storing water that has been supplied through the water supply pipe 300. The third pressure sensor 410 is disposed on the inner bottom surface 402 of the water storage tank 400. The water level is calculated by using the pressure measurement data 410a of the water pressure measured by the third pressure sensor 410, and has a function for measuring the water pressure by the water stored in the water storage tank 400. The

  The A / D converter 202 acquires the pressure measurement data 140a, 150a, 410a measured by the first pressure sensor 140, the second pressure sensor 150, and the third pressure sensor 410, and converts them into digital data 140b, 150b, 410b. It has the function to do.

  The arithmetic unit 204 has a function of acquiring and recording the digital data 140b, 150b, 410b of the pressure measurement data 140a, 150a, 410a output from the A / D converter 202, and the recorded digital data 140b, 150b. , 410b has a function of calculating a pressure value. Then, based on the calculated pressure value, the control content for driving the valve body is determined, and the driving amount data 204a for driving the valve body 120 is calculated and transmitted to the opening degree control device 206. Further, the set differential pressure and the set value of the pressure that are compared when calculating the driving amount data 204a are stored as data stored in the database of the arithmetic unit 204.

  The opening degree control device 206 has a function of acquiring the transmitted driving amount data 204a and further transmitting it to the valve body driving device 130 as driving amount data 206a necessary for driving the valve body 120.

  The valve body driving device 130 drives the valve body 120 based on the transmitted drive amount data 206a.

  Hereinafter, the processing content processed by the arithmetic unit 204 will be described in more detail. In the arithmetic unit 204, the differential pressure is calculated by obtaining the difference between the pressure values calculated from the digital data 140b and 150b of the first pressure sensor 140 and the second pressure sensor 150. Subsequently, flow rate data is calculated from the calculated differential pressure value. Further, the arithmetic device 204 calculates the water level data in the water storage tank 400 from the pressure value calculated from the digital data 410 b of the pressure measurement data 410 a of the third pressure sensor 410.

  Subsequently, the driving amount of the valve body is calculated using the calculated differential pressure and water level data. Before that, in the arithmetic unit 204, the desired differential pressure, pressure and water level values are calculated in advance. Is set and stored in a database or the like. Accordingly, the drive amount data 204a for driving the valve body 120 is calculated by comparing the set values of the set differential pressure, pressure and water level with the calculated differential pressure, pressure and water level data, respectively. can do. That is, when the preset differential pressure setting value and the calculated differential pressure data are compared, and the calculated differential pressure data is low, the valve body 120 of the valve 100 is driven to open. Quantity data 204a is calculated. Further, when the calculated differential pressure data is high, drive amount data 204a for driving the valve body 120 of the valve 100 to be closed is calculated. The calculated drive amount data 204a is transmitted to the opening degree control device 206.

  In addition, when comparing the set value of the preset water level and the calculated water level data, when it is recognized that the water level has dropped, so that water can be supplied by opening the valve body 120 of the valve 100, Driving amount data 204a for driving the valve body 120 is calculated. In addition, when it is recognized that the set value of the set water level is reached, drive amount data 204a for driving the valve body 120 of the valve 100 to be closed is calculated. The calculated drive amount data 204 a is transmitted to the opening degree control device 206.

  Further, in the arithmetic unit 204, pressure values or water level data calculated based on the pressure measurement data 140a, 150a, 410a of the first pressure sensor 140, the second pressure sensor 150, and the third pressure sensor 410 are displayed in time series. By doing so, it is possible to monitor the time series change of the pressure value and the water level data on the screen.

  Here, further, the control flow of the control device in the present embodiment will be described in detail.

  FIG. 6 schematically shows a water storage device using the control valve in FIG. The water pressure data measured according to the change in the amount of water or the like stored in the water storage tank 400 by the third pressure sensor 410 is compared with, for example, six levels of water pressure setting values set in the arithmetic unit 204. Thus, the water level in the water storage tank 400 is controlled. Here, the six levels of water pressure set values are “Level-1 lower limit alarm water level”, “Level-2 lower limit alarm recovery water level”, “Level-3 water supply start water level”, “Level-4 water supply stop water level”, “ Level-5 upper limit alarm recovery water level "and" Level-6 upper limit alarm water level ".

  Here, “Level-1 lower limit alarm water level” is a set value for water intake stop and water level abnormality notification, and “Level-2 lower limit alarm recovery water level” is a set value for water intake start permission and error notification release. It is. “Level-3 water supply start water level” is a set value for starting the opening operation of the valve body 120. “Level-4 water supply stop water level” is a set value for starting the closing operation of the valve body 120, and the optimum water supply stop water level is obtained by using the accumulated inflow amount and the water storage rotation rate and the accumulated use water amount data. Is calculated (see FIG. 7). Here, the accumulated inflow is the accumulated flow per day, and the water storage rotation rate is the accumulated flow per day / water storage. Furthermore, “Level-5 upper limit alarm recovery water level” is a set value for canceling a water level abnormality report, and “Level-6 upper limit alarm water level” is a set value for reporting a water level abnormality.

  FIG. 7 shows a control flow for calculating an optimum set value of the “Level-4 water supply stop water level”. The data measured by the first pressure sensor 140 (S80) is sampled every fixed time: T (S81). The sampled measurement value is A / D converted by the A / D conversion device 202 and then converted into a pressure value (S82). Then, the pressure value: AP measured by the first pressure sensor 140 is obtained and recorded in the arithmetic unit 204 (S83). The data measured by the second pressure sensor 150 (S84) is sampled every fixed time: T (S85). The sampled measurement value is A / D converted by the A / D conversion device 202 and subsequently converted into a pressure value (S86). Then, the pressure value BP measured by the second pressure sensor 150 is obtained and recorded in the arithmetic unit 204 (S87).

  Subsequently, the inflow amount Qin into the water storage tank 400 is calculated from the pressure difference measured by the first pressure sensor 140: AP and the pressure value measured by the second pressure sensor 150: BP ( S88). Here, the inflow amount: Qin is calculated by Qin = Fn (AP−BP). Here, Fn is a calculation coefficient for converting into a flow rate.

  Further, the water usage data (S89) in the water storage tank 400 is accumulated as a record. By using the calculated accumulated inflow amount and the water storage rotation rate and the accumulated water usage data, the water supply level-4 is used. An optimum set value of the stop water level is calculated (S90).

  Further, a pressure change per hour is calculated from the pressure value measured by the first pressure sensor 140: AP (S91), and water hammer prevention control is executed by a routine after S5 in FIG. 2 (S92).

  FIG. 8 shows a control flow of liquid level control in the water storage tank 400 using the third pressure sensor 410. The data measured by the third pressure sensor 410 (S100) is sampled every fixed time: T (S101). Subsequently, the pressure value is converted (S102). Then, the pressure value CP measured by the third pressure sensor 410 is obtained and recorded in the arithmetic unit 204 (S103).

  Subsequently, the pressure value CP measured by the third pressure sensor 410 is compared with the preset six-stage water pressure set values.

  First, a comparison between CP (S103) and Level-1 (lower limit alarm water level) is performed (S104). As a result, if CP <Level-1 (lower limit alarm water level) (S105), a water reception low water alarm is transmitted (S106), and the opening degree control device 206 is changed from the arithmetic unit 204 to open the valve body 120. Through this, a command is issued to the valve body driving device 130 (S107).

  Further, the comparison between CP (S103) and Level-6 (upper limit alarm water level) is performed (S108). As a result, if CP> Level-6 (upper limit alarm water level) (S109), a water receiving full water alarm is transmitted (S110), so that the valve body 120 is closed from the arithmetic unit 204 via the opening degree control unit 206. Then, a command is issued to the valve body driving device 130 (S111).

  Further, the set water pressure value of Level-3 (water supply start water level) is set slightly above the level-2 (S112), and then comparison between CP (S103) and Level-3 (water supply start water level) is performed. Is performed (S113). As a result, when CP ≦ Level-3 (S114), when the water supply start water level is transmitted (S115), the valve body driving device 130 is opened from the arithmetic unit 204 via the opening degree control device 206 so that the valve body 120 is opened. Is issued (S116).

  Subsequently, a comparison is made between CP (S103) and Level-4 (water supply stop water level) calculated in S90 of FIG. 7 (S117). As a result, if CP ≧ Level-4 (water supply stop water level) (S118), the water supply stop water level is transmitted (S119), so that the valve body 120 is closed from the arithmetic unit 204 via the opening degree control device 206. A command is issued to valve body driving device 130 (S120).

  If CP> Level-3 (S121) or CP <Level-4 (S122), it is determined that the water level is intermediate (S123), and the current state of the valve is maintained (S124). Here, the intermediate water level is a water level between the water supply start water level and the water supply stop water level.

  As described above, since the balance between the inflow amount and the outflow amount of the water storage tank 400 is maintained by using the water storage device 12 using the control valve according to the present invention, the water storage device 12 is provided with the water storage tank 400. The constant water level control is possible so that the water level at is maintained at the intermediate water level. That is, when calculating the set value of the water supply stop water level that is the optimum Level-4, the control of FIG. 6 to FIG. 8 is performed so that the critical braking condition for ensuring the water level stability in the water storage tank 400 is satisfied. The constant water level control in the water storage tank 400 is performed by executing the flow.

  The control valve 10 used in the water storage device 12 exhibits the same effect as the control valve 10 described above, and also exhibits the following effect as the water storage device 12.

  That is, by calculating the water level data from the pressure measurement data 410a of the third pressure sensor 410 and comparing the calculated water level data with a preset value of the water level, the valve body 120 of the valve 100 can be opened and closed. Therefore, the water level stored in the water storage tank 400 can be controlled to be a constant water level.

  Further, the pressure measurement data 140b, 150b, 410b recorded in the arithmetic device 204 can be transmitted to an external terminal such as a personal computer or a portable terminal by using a communication device or the like connected to the arithmetic device 204. It is. Thereby, the status of the valve 100 can be monitored remotely, and when there are a large number of valves, a centralized monitoring system can be constructed. Since the valve 100, the A / D conversion device 202, the arithmetic device 204, and the opening control device 206 are integrally configured, the merit is exhibited in installation cost, maintenance, function, reliability, and the like. When the valve 100 must be installed in a very poor environment, the valve 100 is used to protect the control device including the A / D conversion device 202, the arithmetic device 204, and the opening degree control device 206. You may install away from.

  FIG. 9 is a block diagram showing a usage example of the piping network remote monitoring and control system 500 using the control valve according to the first embodiment of the present invention. Specifically, a piping network for supplying water from the water purification plant 502 to the water supply area A 510, the water supply area B 520, and the water supply area C 530 is shown. The piping network includes three water supply lines, that is, an A line 514, a B line 524, and a C line 534. Control valves 504, 511, 512, 513, 515, 521, 522, 523, 525, 531, 532, and 533 according to the present invention are installed at important points of the piping network. In addition, each control valve 504, 511, 512, 513, 515, 521, 522, 523, 525, 531, 532, 533 is provided with a control device 200, 200,... For controlling each control valve. Is done. Further, a remote monitoring control device 550 is connected to the control devices 200, 200,... Via a wireless line or a public line.

  Here, FIG. 9 shows a state in which the A line 514 is damaged and cannot be used due to a natural disaster or an accident. At this time, the pressure monitoring values of the second pressure sensor 150 of the control valve 511 and the first pressure sensor 140 of the control valve 512 are acquired by the remote monitoring control device 550. The pressure measurement values of the control valve 511 and the control valve 512 can be visually grasped by the remote monitoring control device 550. Then, the outlet pressure of the control valve 511 and the inlet pressure of the control valve 512 are clearly compared with the set values or log data values stored in advance in the control device 200 and the remote monitoring control device 550. It turns out that it has fallen.

  Then, first, the control device 200 determines that there is an abnormality between the control valve 511 and the control valve 512 installed in the pipe line, that is, the A line 514. Immediately after that, the driving amount data for driving the valve body to be closed is transmitted from the control device 200 to the valve body driving devices (not shown) of the control valve 511 and the control valve 512, and the valve body is closed. Is done. At the same time, the remote monitoring control device 550 displays and confirms the pressure measurement values of the first pressure sensor 140 and the second pressure sensor 150 of each of the control valve 511 and the control valve 512 after the valve body is closed.

  On the other hand, in the remaining control valves, the remote monitoring control device 550 confirms that the pressure measurement values of the first pressure sensor 140 and the second pressure sensor 150 are normal values. It is confirmed that the piping network excluding 514 is normal. Then, according to a manual prepared in advance, after confirming the safety of resuming water supply to the water supply A area, control data for opening the valve body of the control valve 515 is set from the remote monitoring control device 550. Then, on the basis of the set control data, the driving amount data for driving the valve body driving device (not shown) of the control valve 515 so that the valve body is opened in the remote monitoring control device 550 is calculated. Sent.

  In this piping network remote monitoring and control system 500, a plurality of control valves are installed for the piping network, and data acquired from these control valves and their control devices (including arithmetic devices and communication devices) is remotely monitored and controlled. By performing monitoring and control collectively at 550, the flow rate, pressure, flow direction, etc. in each pipe can be recorded and checked continuously. Then, by using the recorded data, the damaged part of the piping network is specified, and the damaged part of the piping network, the abnormal state of the control valve, etc. can be displayed on the remote monitoring control device 550, for example. Is possible. In addition, taking into consideration the damage status of some piping in the piping network, control valves installed in different piping networks can be used to secure lifelines in disasters and accidents. .

  When the communication infrastructure and / or the power supply is cut off, the control device 200 can be operated based on the setting received from the remote monitoring control device 550 in advance by backing up the control valve with a battery. is there.

  The valve body 120 used in the valve 100 in the present embodiment is a ball valve valve body, but is not limited thereto, and any valve body such as a butterfly valve, a gate valve, or a globe valve is used. It doesn't matter. In this case, the orifice portion in the pipe is not necessarily required if the valve body portion has a large resistance even when the valve body such as a butterfly valve other than the ball valve and the gate valve is fully opened.

  Here, the valve body 120 may be provided with a tapered through hole 122 in which the diameter of the inlet (one end) of the through hole 122 of the ball valve is larger than the diameter of the outlet (the other end). By using the valve body 120 of the ball valve provided with this tapered through hole 122, even if this through hole 122 is in the fully open state of the valve body 120, it serves as a water flow resistance portion (water flow resistance means). There is no need to provide an orifice. From the viewpoint of water flow resistance, the tapered shape of the through hole 122 may be such that the inlet diameter is smaller than the outlet diameter.

  The first pressure sensor 140 and the second pressure sensor 150 are arranged at equal intervals across the valve body, but are not limited thereto, and the first pressure sensor 140 and the second pressure sensor 150 The distance of the interval may be approaching or separating.

  The cross-sectional shape of the orifice portion 160 is not limited to the shape used in the embodiment, and may be a rectangle, a semicircle, an equilateral triangle, or the like, or a nozzle shape.

  When the constant flow rate control is performed in the control device 200 or the arithmetic device 204 in this embodiment, it is determined as a set value for the differential pressure between the first pressure sensor 140 and the second pressure sensor 150, but is not limited to this. Instead, for example, the flow rate may be set as a set value, and the constant flow rate control may be performed by comparing with the flow rate calculated from the differential pressure in the pipe 110.

It is sectional drawing of the control valve by 1st Embodiment of this invention, and a block diagram including the control apparatus and the remote monitoring control apparatus. It is a flowchart which shows the control flow of the 1st pressure sensor of the control valve of FIG. It is a flowchart which shows the control flow of the 2nd pressure sensor of the control valve of FIG. It is a flowchart which shows the control flow of the I / O controller which comprises the control apparatus of the control valve of FIG. It is a schematic block diagram of the water storage apparatus using the control valve of FIG. It is the figure which showed typically the water storage apparatus shown in FIG. It is a flowchart which shows the control flow etc. for calculating the optimal set value of Level-4 (water supply stop water level) in the water storage apparatus shown in FIG. It is a flowchart which shows the control flow of the liquid level control in the water storage tank using the 3rd pressure sensor in the water storage apparatus shown in FIG. It is a schematic block diagram which shows the structure of the piping network remote monitoring control system using two or more control valves of FIG.

Explanation of symbols

10, 504, 511 to 513, 515, 521 to 523, 525, 531 to 533 Control valve 12 Water storage device 100 Valve 110 Piping 112 Inner surface 114 First indented portion 116 Second indented portion 120 Valve body 122 Through hole 130 Valve body drive Device 132 Drive means 134 Tube portion 136 Drive shaft 138 Bearing 140 First pressure sensor 142 First pressure measurement surface 150 Second pressure sensor 152 Second pressure measurement surface 160 Orifice portion 170 First piping connection portion 170A Second piping connection portion 172 172A Mounting hole 200 Control device 202 A / D conversion device 204 Arithmetic device 206 Opening control device 250, 550 Remote monitoring control device 300 Water pipe 400 Water storage tank 402 Internal bottom surface 410 Third pressure sensor 500 Piping network remote monitoring control system 502 Water purification Place 510 Water Supply Area A 514 A Line 520 Water Supply Area B 524 B Line 530 Water Supply Area C 534 C Line

Claims (6)

Piping, valve body disposed substantially in the middle of the piping, valve body driving means for electrically driving the valve body, first pressure disposed between one end of the piping and the valve body A valve including a sensor and a second pressure sensor disposed between the other end of the pipe and the valve body;
Based on the detection data from the first pressure sensor and / or the second pressure sensor, a flow of fluid having control means for calculating the driving amount of the valve body and controlling the valve body driving means is controlled. A control valve,
The pipe, the valve body, the first pressure sensor, the second pressure sensor, and the valve body driving means are integrally formed, and water flow resistance means is provided between the first pressure sensor and the second pressure sensor. Control valve characterized by providing   The control valve according to claim 1, wherein the control means is formed integrally with the control valve. The valve body comprises a valve body structure of a ball valve or a gate valve,
The water flow resistance means includes an orifice portion formed in the pipe between the position where the first pressure sensor is disposed and the position where the second pressure sensor is disposed. The control valve according to claim 1 or 2.   The first pressure sensor and the second pressure sensor so that the inner surface of the pipe, the first pressure measurement surface of the first pressure sensor, and the second pressure measurement surface of the second pressure sensor form the same surface. The control valve according to claim 1, wherein the control valve is attached to the pipe. The valve body is formed of a valve body structure of a ball valve having a through hole formed in the axial direction of the pipe, and the through hole is formed in a tapered shape in which the diameter of one end is different from the diameter of the other end. And
The control valve according to claim 1, wherein the through hole constitutes the water flow resistance means. A pipe network remote monitoring and control system configured to form a pipe network using a single or a plurality of control valves according to any one of claims 1 to 5,
The control means includes communication means,
Acquire data from the control means of a single or a plurality of the control valves via a wireless line or public line using the communication means, and display the acquired data for remotely monitoring the state of the control valve Function to
A function for optimally setting various control data to a single or a plurality of the control valves based on the acquired data;
A piping network remote monitoring control system, comprising: a remote monitoring control means having a function of remotely controlling one or a plurality of the control valves based on the acquired data.

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