JP6346549B2 - In-pipe monitoring system - Google Patents

Description

  The present application relates to a monitoring system in a pipe, and particularly relates to a system for monitoring a state in a pipe through which a gas-liquid two-phase fluid of a gas phase fluid and a liquid phase fluid flows.

  In a steam plant or the like that supplies steam to a heat exchanger or the like through piping, maintenance and inspection work for various facilities constituting the plant is periodically performed in order to maintain steam supply efficiency and the like. In piping, the state in piping is also inspected using a detection device or the like that detects the level of drain generated in the piping with ultrasonic waves (for example, see Patent Document 1). Such a detection device is disposed, for example, at a predetermined location of the pipe and detects the liquid level of the drain at the predetermined location. In addition, a device that detects the flow rate (flow rate) of the drain in the pipe is also used for checking the state of the pipe.

JP 2003-28699 A

  Various types of information in the pipe, such as the presence or absence of drainage, are detected using each detection device as described above, but each of the detection devices is basically disposed at a different location on the pipe. Therefore, it may be difficult to determine the state in the piping by combining various information. Therefore, there is also a demand for acquiring as much information in the pipe as possible at the same location in the pipe and more accurately grasping the state in the pipe based on various information.

  An object of this application is to provide the monitoring system which can acquire the information in multiple types of piping in the same location in piping.

  The monitoring system in the pipe in which the gas-liquid two-phase fluid of the gas phase fluid and the liquid phase fluid disclosed in the present application flows in a predetermined direction includes an ultrasonic transmission means, an ultrasonic reception means, a liquid phase liquid level calculation means, a reception position specifying means , Liquid phase flow rate calculating means, and display means. The ultrasonic wave transmission means is disposed on the outer surface of the bottom portion of the pipe that is arranged substantially horizontally, and emits ultrasonic waves upward. The plurality of ultrasonic receiving means are arranged in order along the predetermined direction on the bottom outer surface of the pipe downstream of the ultrasonic transmitting means in the predetermined direction, and reflected by the liquid surface of the liquid phase fluid Receives reflected waves of sound waves. The liquid phase liquid level calculation means calculates the liquid level of the liquid phase fluid by measuring an elapsed time from when the ultrasonic wave is emitted until a reflected wave is received. The reception position specifying means specifies the ultrasonic receiving means that has received the reflected wave from the plurality of ultrasonic receiving means, based on the detection values of the plurality of ultrasonic receiving means. The liquid phase flow velocity calculation means calculates the flow velocity of the liquid phase fluid based on the liquid level of the liquid phase fluid, the elapsed time, and the position of the ultrasonic wave reception means that has received the reflected wave.

  Detection means for detecting information for calculating the flow velocity of the gas phase fluid at substantially the same position as the detection position of the liquid level in the predetermined direction, and the detection position in the height direction of the detection means as the height of the gas phase. Adjusting means for adjusting the position, and gas phase flow rate calculating means for calculating the flow rate of the gas phase fluid based on the detection value by the detecting means, wherein the adjusting means is calculated by the liquid level calculating means. You may make it adjust the detection position in the height direction of the said detection means based on the liquid level of a liquid phase fluid.

  The detection means includes a vortex generator disposed in the pipe, a vortex detection sensor for detecting a vortex generated in the gas phase by the vortex generator, and the adjustment means includes the liquid phase liquid level calculation means The vortex generator may be moved in the vertical direction so that the vortex generator is included in the gas phase based on the liquid level of the liquid phase fluid calculated by the above.

  Storage means for preliminarily storing the comparison value of the liquid level of the liquid phase fluid, the liquid level of the liquid phase fluid calculated by the liquid phase liquid level calculation means and the comparison value are compared, and piping based on the comparison result And determining means for determining the abnormal state.

  The gas-phase fluid includes steam, and the liquid-phase fluid includes drain condensed by the steam, and the comparison value discharges drain in the pipe upstream in the predetermined direction from the ultrasonic transmission unit. It may be a value predicted from the distance between the steam trap and the liquid level detection position and the amount of heat released from the pipe between the steam trap and the liquid level detection position.

  According to the monitoring system disclosed in the present application, the liquid level and the flow velocity of the liquid phase fluid are calculated at the same location in the pipe by the ultrasonic transmission unit and the plurality of ultrasonic reception units. Therefore, multiple types of information in the piping at the same location can be acquired. Thereby, a maintenance inspection worker or the like can grasp the state in the pipe more accurately based on a plurality of types of information.

It is a figure which shows the structure of the monitoring system in piping which concerns on Example 1. FIG. It is explanatory drawing explaining the propagation path in the drain of an ultrasonic wave. It is a flowchart which shows the monitoring process which the monitoring system which concerns on Example 1 performs. It is a figure which shows the structure of the monitoring system in the piping which concerns on Example 2. FIG. It is a figure which shows the structure of the monitoring system in piping which concerns on Example 3. FIG.

  A monitoring system according to the present application will be described with reference to the drawings. Note that the configuration of the monitoring system disclosed in the present application is not limited to the embodiment. Further, the order of the various processes constituting the flow described below is in no particular order as long as no contradiction occurs in the processing contents.

Configuration of Monitoring System 1 in First Pipe FIG. 1 is a diagram showing a configuration of the monitoring system 1 in the pipe 2. FIG. 1 shows a cross section of the pipe 2. In this embodiment, a monitoring system 1 for monitoring the state in the pipe 2 at a predetermined location of the pipe (steam pipe) 2 installed horizontally in the steam plant will be described.

  In the pipe 2, the vapor 50 (gas phase fluid) and the gas-liquid two-phase fluid of the drain 51 (liquid phase fluid) in which the vapor 50 is phase-changed, that is, condensed, flow in a direction indicated by an arrow A. In the pipe 2 arranged substantially horizontally, for example, as shown in FIG. 1, the gas phase and the liquid phase are in a two-layered state (two-phase flow).

  The monitoring system 1 includes an ultrasonic transmission / reception unit 10, a vortex flow rate detection unit 20, a main body device 30, and the like. The ultrasonic transmission / reception unit 10 includes an ultrasonic transmitter 11, a plurality of ultrasonic receivers 12 (12 </ b> A to 12 </ b> E), and the like, emits ultrasonic waves to calculate the liquid level of the drain 51, and starts from the liquid level of the drain 51. Receive the reflected wave.

  The ultrasonic transmitter (ultrasonic transmitting means) 11 is disposed on the outer surface of the bottom of the pipe 2 and emits impulse-like ultrasonic waves obliquely upward (in the direction of arrow B) inclined by a predetermined angle in the direction of arrow A from vertically above. To do. A plurality of ultrasonic receivers (ultrasonic receiving means) 12 are arranged at predetermined intervals in order along the direction of arrow A on the outer surface of the bottom of the pipe 2 downstream of the ultrasonic transmitter 11 and receive ultrasonic reflected waves. To do. The ultrasonic wave may be emitted vertically upward.

  In the ultrasonic transmitter 11, the emission of ultrasonic waves is controlled by the main body device 30 (control unit 31) connected by wire. In addition, the plurality of ultrasonic receivers 12 transmit detection values to the main body device 30 (control unit 31) connected by wire. The ultrasonic transmitter 11 and the ultrasonic receiver 12 have a general configuration configured using a vibrator (for example, piezoelectric ceramics) and the like, and thus detailed description thereof is omitted.

  The ultrasonic wave emitted from the ultrasonic transmitter 11 in the direction of arrow B reaches the bottom inner surface from the bottom outer surface of the pipe 2, and a part of the ultrasonic wave is reflected on the bottom inner surface of the pipe 2. Then, most of the remaining ultrasonic waves propagate through the drain 51 and are reflected at the liquid surface (the boundary surface between the drain 51 and the vapor 50). One of the plurality of ultrasonic receivers 12 receives the reflected wave reflected by the liquid surface of the drain 51. The ultrasonic receiver 12 converts the received reflected wave into an electric signal (voltage) and outputs it to the control unit 31. Then, based on information such as the elapsed time from when the ultrasonic wave is emitted until the reflected wave is received, the reception position of the reflected wave, etc., the liquid level, flow velocity and flow rate (volume flow rate) of the drain 51 are determined. calculate.

  The liquid level of the drain 51 is calculated by a general method based on the elapsed time and the speed of sound. For example, the liquid level of the drain 51 is calculated based on the elapsed time when the ultrasonic wave emitted vertically upward from the lower surface of the drain is reflected back from the upper surface of the drain and the speed of the ultrasonic wave at that time. The flow rate of the drain 51 is calculated based on the liquid level of the drain 51, the elapsed time, and the reflected wave reception position. Further, the flow rate of the drain 51 is calculated by a general method based on the liquid level and flow velocity of the drain 51 and the diameter of the pipe 2.

  Next, the reception position of the reflected wave will be described with reference to FIGS. 2 (A) and 2 (B). FIG. 2 is an explanatory diagram for explaining the propagation path of the ultrasonic drain. For example, when the flow rate of the drain 51 is 0, as shown in FIG. 2A, the ultrasonic wave Q emitted in the direction of the arrow B is reflected at a certain angle on the liquid levels W1 to W3, and the reflected wave Q '1 to Q'3 reach the bottom inner surface. That is, the position where the reflected wave reaches the bottom inner surface changes depending on the liquid level of the drain 51.

  When such a reflected wave is received by a plurality of ultrasonic receivers 12, the reflected wave is not necessarily received by only one ultrasonic receiver 12 but may be received by a plurality of ultrasonic receivers 12. This is because ultrasonic waves propagate while spreading in a fan shape. Therefore, the control unit 31 specifies the ultrasonic receiver 12 that has received the reflected wave from the plural ultrasonic receivers 12 based on the detection values of the plural ultrasonic receivers 12. For example, the ultrasonic receiver 12 that has received the reflected wave with the highest voltage (sound pressure) at the same timing is identified as the ultrasonic receiver 12 that has received the reflected wave, and the location of the receiver 12 is determined as the reflected wave. Is the receiving position.

  The ultrasonic waves are also affected by the flow of the drain 51. That is, the position where the reflected wave reaches the bottom inner surface changes depending on the flow velocity of the drain 51. For example, when the flow velocity of the drain 51 is a predetermined value (> 0), as shown in FIG. 2B, the ultrasonic wave Q is emitted in the direction of the arrow B, but the flow of the drain 51 in the direction of the arrow A. Affected by. Therefore, even when the liquid level W1 is the same as that in FIG. 2A, the position where the reflected wave Q'1 reaches the bottom inner surface when the flow velocity is a predetermined value is the reflected wave when the flow velocity is 0 (one-dot chain line). Is shifted downstream from the position where the bottom reaches the inner surface (phase shift).

  As described above, the deviation of the arrival position (reception position) of the reflected wave occurs due to the ultrasonic wave (reflected wave) being influenced by the flow of the drain 51. In addition, since the deviation of the reception position of the reflected wave occurs between the time when the ultrasonic wave is emitted and received (elapsed time), for example, it is calculated from the deviation amount and the elapsed time of the reception position of the reflected wave. This speed can be used as the flow rate of the drain 51.

  Also, the deviation (amount of deviation) of the reception position of the reflected wave can be calculated from the difference between the reference position and the actual reception position of the reflected wave. The reference position is a reflected wave reception position when the flow rate of the drain 51 is zero. Since the reflection of the ultrasonic wave when the flow velocity of the drain 51 is 0 is a constant angle, it can be calculated based on this reflection angle and the calculated liquid level of the drain 51. The reflection angle information is stored in advance in the main device 30 (storage unit 32). The reception position can be specified by distances D1 to D5 between the ultrasonic transmitter 11 and each ultrasonic receiver 12 as shown in FIG. Each distance information indicating the distances D1 to D5 is stored in the main device (storage unit 32) in advance.

  For example, in the case of the ultrasonic wave Q shown in FIG. 2B, the reception position of the reflected wave when the flow velocity is 0 is calculated as a position away from the ultrasonic transmitter 11 by the distance DD. Then, the actual reflected wave Q′1 is received by the ultrasonic receiver 12D. Therefore, the shift amount of the reception position is distance D5−distance DD.

  The vortex flow rate detection unit 20 includes a detection unit 21, a converter 22, a drive unit 23, and the like, and calculates the flow velocity (volume flow rate) of the gas phase fluid (steam 50). The detection unit (detection means) 21 includes a vortex generator 24 and a vortex detection sensor 25, and detects vortices in the gas phase fluid (vapor 50) at the same position in the direction of arrow A with the detection position of the drain 51 such as the liquid level. To detect. The detection positions may be substantially the same. The vortex generator 24 is, for example, a triangular prism, and generates a vortex (Karman vortex) in the steam 50. The vortex detection sensor 25 is a piezoelectric element, for example, and detects the generated vortex. The vortex detection sensor 25 is connected to the converter 22.

  The converter (gas phase flow rate calculation means) 22 is composed of a CPU or the like, measures the vortex frequency based on the detection value of the vortex detection sensor 25, and determines the flow velocity of the steam 50 based on the vortex frequency and the diameter of the pipe 2. calculate. Moreover, the converter 22 transmits the calculated flow velocity of the vapor 50 to the main body device 30 (the control unit 31). Based on the received flow velocity of the steam 50, the diameter of the pipe 2, and the calculated liquid level of the drain 51, the control unit 31 calculates the steam consumption using a general method. The configurations of the detection unit 21 and the converter 22 that detect the generated vortex (frequency) and calculate the flow velocity are general configurations, and thus detailed description thereof is omitted.

  The drive part 23 is arrange | positioned at the upper outer surface of the piping 2, and supports the vortex generator 24 so that a movement to an up-down direction is possible. For example, the drive unit 23 includes a stepping motor, a rack and pinion mechanism, and the like, and moves the vortex generator 24 functioning as a pinion in the vertical direction by driving the stepping motor. Therefore, even if the liquid level of the drain 51 changes, the vortex generator 24 can be adjusted to be included in the gas phase. As a result, it is possible to prevent the vortex generator 24 from being included in the liquid phase and causing a vortex in the drain 51 to reduce the accuracy of the vortex detection sensor 25. The drive of the drive unit 23 is controlled by a main body device 30 (control unit 31) connected by wire. Therefore, the drive part 23 and the control part 31 of the main body apparatus 30 correspond to the adjusting means of the present application.

  The main unit 30 includes a control unit 31, a storage unit 32, an operation unit 33, a display unit 34, and the like, and various types such as a liquid level, a flow rate, a flow rate, and a flow rate, consumption amount, etc. Calculate and display information. The main body device 30 is disposed on the upper outer surface of the pipe 2, for example.

  The control unit 31 is composed of a CPU and the like, and controls the operation of the entire system 1 based on programs and data stored in the storage unit 32. Specifically, the liquid level, the flow velocity, the flow rate, and the consumption amount of the vapor 50 of the drain 51 in the pipe 2 are calculated based on the detection values received from the ultrasonic transmission / reception unit 10 and the vortex flow rate detection unit 20. Therefore, the control unit 31 corresponds to the liquid phase liquid level calculation unit, the liquid phase flow rate calculation unit, and the reception position specifying unit of the present application.

  The storage unit 32 is, for example, a hard disk. The operation unit 33 receives an operation input from a maintenance inspection worker or the like. Specifically, an input of a start instruction for monitoring the state in the pipe 2 is accepted. The display unit (display unit) 34 is, for example, a liquid crystal display, and displays various information such as the liquid level, the flow rate, the flow rate of the drain 51 in the pipe 2, and the flow rate, consumption amount of the steam 50.

  Further, the control unit 31 determines whether or not the state in the pipe 2 is an abnormal state by comparing the calculated liquid level of the drain 51 and the comparison value (abnormal determination). The abnormality determination is performed together with monitoring in the pipe 2, for example. The comparison value is a predicted value of the liquid level of the drain 51 at the ultrasonic detection position by the ultrasonic transmission / reception unit 10. The comparison value can be calculated by, for example, a general method based on the distance L between the steam trap 60 disposed upstream of the pipe 2 and the detection position and the heat radiation amount of the pipe. Since the drain 51 is discharged from the steam trap 60, the liquid level (comparison value) is set from the amount of the drain 51 that is predicted to be generated between the steam trap 60 and the detection position.

  The comparison value may be, for example, a numerical value range that can be determined to be normal, or a single numerical value. When it is in the numerical range, it is determined as normal if the calculated liquid level of the drain 51 is within the numerical range of the comparison value. Further, when it is a single numerical value, it is determined to be normal when the calculated liquid level of the drain 51 is the same numerical value, or is determined to be normal when the difference from the single numerical value is within a predetermined value. To do. The comparison value may be stored in the storage unit 32 in advance.

Second Flowchart FIG. 3 is a flowchart showing a monitoring process executed by the monitoring system 1. This process is executed by the control unit 31 when the operation unit 33 receives an input of a start operation for monitoring the state in the pipe 2.

  First, the control unit 31 emits ultrasonic waves from the ultrasonic transmitter 11 (step S10) and starts measuring time (step S11). And it waits until the ultrasonic receiver 12 receives the reflected wave (voltage value) of an ultrasonic wave (step S12: YES).

  When it is determined that the reflected wave has been received (step S12: YES), the control unit 31 stops timing (step S13) and calculates the liquid level of the drain 51 (step S14). The liquid level of the drain 51 is calculated based on the elapsed time and the speed of sound that are timed as described above. Next, the control part 31 calculates the flow velocity of the drain 51 (step S15). As described above, the flow rate of the drain 51 is calculated based on the liquid level of the drain 51, the elapsed time, and the reception position of the reflected wave.

  Thereafter, the controller 31 adjusts the height position of the vortex generator 24 of the vortex flow rate detector 20 (step S16). As described above, the height position is set based on the liquid level of the drain 51 so that the vortex generator 24 is included in the gas phase. For example, the vortex generator 24 is moved so as to be positioned above the liquid level of the drain 51 by a predetermined amount. For example, the reference position of the upper end portion of the vortex generator 24 may be determined and the amount of movement from this reference position may be calculated. First, the vortex generator 24 is moved so that the upper end reaches the reference position, and then the vortex generator is moved by the calculated movement amount. For the movement of the upper end portion of the vortex generator 24 to the reference position, for example, a detection sensor having a light emitting portion and a light receiving portion may be used.

  And after adjustment of the vortex generator 24, the control part 31 acquires the flow velocity of the vapor | steam 50 from the converter 22 (step S17). Note that the controller 31 may calculate the flow velocity instead of the converter 22. Next, the control part 31 calculates a steam consumption (step S18). As described above, the calculation is based on the flow velocity of the steam 50, the diameter of the pipe 2, and the liquid level of the drain 51.

  Then, the control part 31 performs abnormality determination of the piping 2 (step S19). As described above, the determination is performed by comparing the liquid level of the drain 51 with the comparison value. And the control part 31 displays the information in the piping 2 calculated and determined by the process to step S19 on the display part 34 (step S20). As described above, the liquid level of the drain 51, the flow velocity, whether or not it is in an abnormal state, and the like are displayed.

  As described above, at least the liquid level and the flow velocity of the liquid phase fluid (drain 51) at the same location can be calculated by the ultrasonic transmitter 11 and the plurality of ultrasonic receivers 12. Therefore, a plurality of types of states in the pipe 2 at the same location can be grasped. As a result, maintenance workers and the like can more accurately grasp the state in the pipe 2 from a plurality of types of states.

  In addition, since the presence or absence of an abnormal state of the pipe 2 is determined by comparing the calculated liquid level of the drain 51 and the comparison value, a maintenance inspection operator or the like can easily detect the abnormal condition of the pipe 2 without making his own judgment. The state can be grasped.

  Furthermore, since the height position of the vortex generator 24 of the vortex flow rate detection unit 20 is adjusted based on the calculated liquid level of the drain 51, the flow velocity of the steam 50 can be calculated more accurately. And the steam consumption based on the flow velocity of the steam 50 can be calculated with high accuracy. Therefore, the state in the pipe 2 can be grasped more accurately.

  In the above-described embodiment, the monitoring process is started when a monitoring start operation input is accepted, but the present invention is not particularly limited to this. For example, you may make it perform a monitoring process for every predetermined period irrespective of operation input, such as an operator. In this case, each information such as the liquid level of the drain 51 may be stored in the storage unit every time the monitoring process is executed. And each information for every monitoring process memorize | stored should just be displayed on the display part 34 according to operation input, such as an operator.

  Furthermore, in the above-described embodiment, the information such as the liquid level of the drain 51 is displayed on the display unit 34 of the main body device 30, but is not particularly limited thereto. For example, the main body device 30 is provided with a communication control unit capable of communicating with other terminals, and each information is transmitted to a portable terminal held by an operator or the like via the communication control unit, and each information is transmitted to the portable terminal. You may make it display. In this case, the mobile terminal is also included in the configuration of the monitoring system 1. Alternatively, an external memory may be connected to the main body device 30 to output each information to the external memory.

  Further, in the above-described embodiment, each information such as the drain liquid level, the flow velocity, and the flow rate is calculated and displayed by a single monitoring process, but it is not necessary to calculate and display all the information at one time. For example, only information designated by operation input may be calculated and displayed.

  This embodiment differs from the above-described first embodiment in the configuration having the ultrasonic flow rate detection unit. This different configuration will be described with reference to FIG. Since other configurations are the same as those in the first embodiment, the description thereof is omitted.

  FIG. 4 is a diagram illustrating a configuration of the monitoring system 100 in the pipe 2. FIG. 4 shows the appearance of the pipe 2. In this embodiment, an ultrasonic flow rate detection unit 120 is provided instead of the vortex flow rate detection unit 20 of the first embodiment. The ultrasonic flow rate detection unit 120 is a non-contact type flow meter that detects the flow velocity (integrated flow rate) of the steam 50 using ultrasonic waves. The ultrasonic flow rate detection unit 120 is a propagation time difference type flow meter, and includes a detection unit 121, a converter 122, and the like.

  The detection unit (detection means) 121 includes three pairs of ultrasonic transceivers 123A to 125A and 123B to 125B capable of transmitting and receiving ultrasonic waves. The ultrasonic transceivers 123 </ b> A to 125 </ b> A are arranged on the outer surface of one side of the pipe 2, and the ultrasonic transceivers 123 </ b> B to 125 </ b> B that form a pair of the ultrasonic transceivers 123 </ b> A to 125 </ b> A The ultrasonic transducers 123 </ b> A to 125 </ b> A are disposed on the outer surface downstream by a predetermined distance.

  The flow rate of the vapor 50 is calculated by a converter (gas phase flow rate calculation means) 122. The converter 122 is composed of a CPU or the like, and drives a switching unit (not shown) to emit ultrasonic waves alternately from the ultrasonic transceivers 123A to 125A and the ultrasonic transceivers 123B to 125B. Then, a time T1 until the ultrasonic transmitters / receivers 123B to 125B receive the ultrasonic waves emitted from the ultrasonic transmitters / receivers 123A to 125A and the ultrasonic waves emitted by the ultrasonic transmitters / receivers 123B to 125B. The time difference Td is calculated from the time T2 until each of the ultrasonic transmitters and receivers 123A to 125A receives the signal, and the flow velocity of the steam 50 is calculated based on the time difference Td. For example, the flow velocity of the steam 50 is calculated based on the average value of the time differences Td of the three pairs of ultrasonic transceivers 123A to 125A and 123B to 125B. Then, the converter 122 transmits the calculated flow velocity of the steam 50 to the control unit 131 of the main body device 130. The configuration of the propagation time difference type flow meter and the calculation of the flow velocity are general configurations, and thus detailed description thereof is omitted.

  The converter 122 starts calculating the flow velocity of the steam 50 based on an instruction from the control unit 131. Further, the instruction from the control unit 131 includes information for designating the ultrasonic transceivers 123A to 125A and 123B to 125B used for calculation of the flow velocity of the steam 50 in pairs. That is, the converter 122 calculates the flow velocity of the steam 50 described above by using only the designated ultrasonic transceiver among the ultrasonic transceivers 123A to 125A and 123B to 125B.

  The controller 131 calculates the liquid level and the like of the drain 51 as in the first embodiment. Then, based on the liquid level of the drain 51, the ultrasonic transceivers 123A to 125A and 123B to 125B to be used are selected. Specifically, among the ultrasonic transmitters / receivers 123 </ b> A to 125 </ b> A and 123 </ b> B to 125 </ b> B, the ultrasonic transmitter / receiver located in the vapor phase of the vapor 50 is selected based on the liquid level of the drain 51. Information on the height position from the bottom inner surface of the pipe 2 of the ultrasonic transceivers 123A to 125A and 123B to 125B is stored in the storage unit 132 of the main body device 130.

  For example, when the ultrasonic transceivers 123A, 124A, 123B, and 124B are included in the gas phase, the control unit 131 uses the two pairs of ultrasonic transceivers 123A, 124A, 123B, and 124B to calculate the vapor 50 in the converter 122. Specify to use. Therefore, the converter 122 and the control unit 131 of the main device 130 correspond to the adjusting means of the present application.

  As described above, even when the flow rate of the steam 50 is calculated using the ultrasonic flow rate detection unit 120, the same effects as those of the first embodiment described above can be obtained. In addition, the arrangement | positioning number of ultrasonic transmitter / receiver 123A-125A, 123B-125B is not specifically limited. Further, a Doppler type ultrasonic flowmeter or the like may be used instead of the propagation time difference type.

  This embodiment differs from the above-described first embodiment in the configuration having a server device and a terminal device. This different configuration will be described with reference to FIG. Since other configurations are the same as those in the first embodiment, the description thereof is omitted.

  FIG. 5 is a diagram illustrating a configuration of the monitoring system 200 in the pipe 2. The monitoring system 200 of this embodiment includes a plurality of main body devices 230, a server device 240, a plurality of terminal devices 245, and the like connected to a communication network 201 such as a local area network.

  Each of the plurality of main body devices 230 is disposed at a predetermined location of each pipe 2 constituting the plant, and is connected to the ultrasonic transmission / reception unit 10 and the vortex flow rate detection unit 20. Therefore, a plurality of ultrasonic transmission / reception units 10 and vortex flow rate detection units 20 are also provided for each of the plurality of main body devices 230. And each main body apparatus 230 (control part 231) performs the monitoring process of calculation of the liquid level etc. of the drain 51, and abnormality determination similarly to Example 1. FIG. In this embodiment, the monitoring process is periodically executed every predetermined period.

  The main device 230 includes a communication control unit 235 in addition to the same configuration as that of the first embodiment. The communication control unit 235 is wirelessly connected to the communication network 201 and controls communication (for example, packet communication) with the server device 240. The main body device 230 of this embodiment does not have the operation unit 33 and the display unit 34 similar to those of the first embodiment, but may have a configuration provided. The control unit 231 transmits information such as the calculated liquid level of the drain 51 to the server device 240.

  The server device 240 includes a control unit 241, a communication control unit 242, a database 243, and the like, and stores and manages each piece of information received from the plurality of main body devices 230. The control unit 241 includes a CPU and the like, and controls the operation of the entire apparatus based on a program, data, and the like stored in a storage unit (not shown). The communication control unit 242 is wired to the communication network 201 and controls communication with the main body device 230 and the terminal device 245. The database 243 stores information on the main device 230.

  For example, the control unit 241 stores and manages the detected position of each main body device 230 and each information such as the liquid level of the drain 51 at the detected position in the database 243. The detection position of the main device 230 is identification information of the main device 230, for example. In this case, each main body device 230 transmits each information such as the liquid level of the drain 51 to the server device 240 together with its own identification information.

  The terminal device 245 is, for example, a personal computer or tablet terminal having a communication function. The terminal device 245 acquires each piece of information on the plurality of main body devices 230 from the server device 240 and displays the information on the display unit 248. The terminal device 245 includes a control unit 246 configured with a CPU and the like, a communication control unit 247 that controls communication, a display unit 248 such as a liquid crystal display, an operation unit 249 such as a keyboard, and the like. Note that the terminal device 245 may directly acquire each piece of information from the main body device 230.

  As described above, since the workers and the like can acquire each piece of information of the main body device 230 using the terminal device 245, the operator knows the state in the pipe 2 without moving to the place where each main body device 230 is disposed. can do.

  The main body device 230 calculates the liquid level of the drain 51, but the server device 240 may perform the calculation. In this case, the main body device 230 may transmit the detection values from the ultrasonic transmission / reception unit 10 and the vortex flow rate detection unit 20 to the server device 240.

[Other examples]
In each of the above-described embodiments, the monitoring system in the pipe for transporting the steam has been described. However, the monitoring system is not particularly limited as long as it is a pipe through which a gas-liquid two-phase fluid flows.

  In each of the above-described embodiments, the drain liquid level, flow rate, flow rate, steam flow rate, consumption amount, and the like are calculated, but at least if multiple types of information in the pipe can be acquired at the same location, It is not limited to this. For example, the drain level and flow rate may be calculated, or the drain level and vapor flow rate may be calculated.

  The present application is useful for enabling acquisition of information in a plurality of types of piping at the same location in the piping. For example, it can be used in an industrial field in which a steam plant of a power generation facility to which a steam supply system for supplying steam to a steam-using device is applied is manufactured, sold, or operated.

DESCRIPTION OF SYMBOLS 1,100,200 Monitoring system 10 Ultrasonic transmission / reception part 11 Ultrasonic transmitter 12 Ultrasonic receiver 20 Eddy flow detection part 21 Detection part 22 Converter 23 Drive part 24 Eddy generator 25 Eddy detection sensor 30, 130, 230 Main body Device 31, 131, 231 Control unit 50 Steam 51 Drain 60 Steam trap 120 Ultrasonic flow rate detection unit 121 Detection unit 122 Converter 123A to 125A, 123B to 125B Ultrasonic transceiver 240 Server device 245 Terminal device

Claims (5)

A monitoring system in a pipe in which a gas-liquid two-phase fluid of a gas phase fluid and a liquid phase fluid flows in a predetermined direction,
An ultrasonic transmission means disposed on the outer surface of the bottom of the pipe, which is arranged substantially horizontally, and emits ultrasonic waves upward;
A plurality of ultrasonic waves that are arranged in order along the predetermined direction on the bottom outer surface of the pipe downstream from the ultrasonic wave transmitting means in the predetermined direction and receive the reflected wave of the ultrasonic wave reflected by the liquid surface of the liquid phase fluid. Ultrasonic receiving means,
Liquid phase liquid level calculation means for calculating the liquid level of the liquid phase fluid by measuring an elapsed time from when the ultrasonic wave is emitted until a reflected wave is received;
Based on detection values of the plurality of ultrasonic receiving means, a receiving position specifying means for specifying an ultrasonic receiving means that has received the reflected wave from the plural ultrasonic receiving means;
A liquid phase flow rate calculation means for calculating a flow rate of the liquid phase fluid based on the liquid level of the liquid phase fluid, the elapsed time, and the position of the ultrasonic wave reception means that has received the reflected wave;
In-pipe monitoring system. Detecting means for detecting information for calculating the flow velocity of the gas phase fluid at substantially the same position as the detection position of the liquid level in the predetermined direction;
Adjusting means for adjusting the detection position in the height direction of the detection means to the height position of the gas phase;
Gas phase flow velocity calculating means for calculating the flow velocity of the gas phase fluid based on the detection value by the detection means,
The monitoring system for piping according to claim 1, wherein the adjusting unit adjusts a detection position in a height direction of the detection unit based on a liquid level of the liquid phase fluid calculated by the liquid level calculation unit. The detection means includes a vortex generator disposed in the pipe, a vortex detection sensor for detecting a vortex generated in the gas phase by the vortex generator,
The adjustment means moves the vortex generator in the vertical direction so that the vortex generator is included in the gas phase based on the liquid level of the liquid phase fluid calculated by the liquid phase liquid level calculation means. The monitoring system in piping of Claim 2. Storage means for storing in advance a comparison value of the liquid level of the liquid phase fluid;
2. A determination unit that compares the liquid level of the liquid phase fluid calculated by the liquid phase liquid level calculation unit with the comparison value, and determines an abnormal state in the pipe based on the comparison result. The monitoring system in piping in any one of -3. The gas phase fluid includes steam, and the liquid phase fluid includes drain condensed with the steam,
The comparison value is the distance between the steam trap that discharges drain in the pipe upstream of the ultrasonic transmission means in the predetermined direction and the detection position of the liquid level, and the detection of the steam trap and the liquid level. The monitoring system in a pipe according to claim 4, which is a value predicted from a heat radiation amount of the pipe between the positions.

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