JP2011220950A - Regulator diagnostic system, regulator diagnostic device, and regulator diagnostic method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regulator diagnostic system, a regulator diagnostic device and a diagnostic method that can diagnose a slave regulator.SOLUTION: A regulator diagnostic system 100 comprises: a main flow path which supplies a fuel gas to multiple houses 2 from gas cylinders 110; a bypass flow path 122 bypassing the main flow path 121; a master regulator 140 provided in the main flow path 121; a slave regulator 150 provided in the bypass flow path 122 and of which adjustment pressure is set higher than that of the main regulator 140; and a regulator diagnostic device 160 which diagnoses the slave regulator 150. The regulator diagnostic device 160 comprises an anomaly diagnostic part which diagnoses anomalies of the slave regulator 150 on the basis of the difference between a predetermined value and a pressure value measured within a range of flow quantity equal to or less than the maximum flow quantity of fuel gas that flows only through the slave regulator 150.

Description

  The present invention relates to a regulator diagnostic system, a regulator diagnostic device, and a regulator diagnostic method.

  Conventionally, a gas supply system for supplying fuel gas to a plurality of houses such as an apartment house has been proposed. The gas supply system includes a gas flow path for supplying fuel gas from a gas supply source to a plurality of houses, and a plurality of individual gas flow paths for supplying fuel gas flowing through the gas flow paths to a plurality of houses. It has.

  The gas flow path includes a main main flow path and a bypass flow path that bypasses the main flow path, and a leak detection device that determines whether or not leakage has occurred is provided on the bypass flow path. Yes. Then, the leak detection device determines that a leak has occurred when the fuel gas flows continuously for 30 days, for example, and issues an alarm or a call.

  In the gas supply system, a parent regulator is installed in the main channel, and a child regulator whose adjustment pressure is higher than that of the parent regulator is installed in the bypass channel. For this reason, when a small flow rate of fuel gas is used or leakage occurs in each home, first, the fuel gas flows through the slave regulator. Thereafter, when the flow rate of the used fuel gas increases, the fuel gas flows through both the parent regulator and the child regulator (see, for example, Patent Documents 1 and 2).

JP-A-3-41300 JP-A-5-296873

  However, in the conventional leakage detection device, it is necessary that the child adjuster is operating normally in order to determine leakage. In other words, when foreign substances are mixed in the child adjuster or the adjustment pressure of the child adjuster decreases due to aging, the fuel gas may flow through the parent adjuster even if a flow rate due to leakage occurs. is there. In such a case, the fuel gas does not pass through the leakage detection device, and leakage detection cannot be performed.

  For this reason, in the past, it was necessary for a worker to visit the site, shut off the gas, install a pressure gauge and perform pressure measurement, and it took a lot of man-hours to diagnose the child regulator.

  The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a regulator diagnostic system, a regulator diagnostic device, and a regulator diagnostic device capable of diagnosing a child regulator. It is to provide a regulator diagnostic method.

  The regulator diagnostic system of the present invention includes a main flow path for supplying fuel gas from a gas supply source to a plurality of houses, a bypass flow path for bypassing the main flow path, and a parent adjustment provided in the main flow path An adjustment device provided in the bypass flow path, the adjustment pressure of which is set higher than the adjustment pressure of the parent adjustment device, and an adjustment device diagnosis device for diagnosing the child adjustment device, The device diagnostic device diagnoses an abnormality of the slave regulator based on a difference between a pressure value measured in a flow rate range equal to or less than a maximum flow rate value of the fuel gas flowing only through the slave regulator and a predetermined value. It has a diagnostic means.

  According to this regulator diagnostic system, the abnormality of the slave regulator is diagnosed based on the difference between the pressure value measured in the flow range below the maximum flow rate value of the fuel gas flowing only through the slave regulator and the predetermined value. To do. Here, when an abnormality occurs in the child adjuster, the adjustment pressure tends to decrease. For this reason, the pressure value measured in the flow rate range also decreases, and the abnormality of the child adjuster can be diagnosed by comparing this pressure value with a predetermined value.

  Further, in the adjuster diagnostic system of the present invention, the adjuster diagnostic device includes a predetermined value calculation unit that calculates the predetermined value, and a storage unit that stores the predetermined value calculated by the calculation unit, Preferably, the predetermined value calculation means calculates the predetermined value from a pressure value measured in the flow rate range within a predetermined period after the child regulator is newly installed.

  According to this regulator diagnostic system, the predetermined value is calculated from the pressure value measured in the flow rate range within a predetermined period after the child regulator is newly installed, that is, when the child regulator is normal. The measured pressure value is compared with a predetermined value when the slave adjuster is normal, and an abnormality of the slave adjuster can be diagnosed.

  In the regulator diagnostic system of the present invention, it is preferable that the predetermined value calculation means calculates the predetermined value based on a pressure value measured from the first time to a predetermined number of times measured in the flow rate range.

  According to this regulator diagnostic system, the predetermined value is calculated based on the pressure value of the predetermined number of times from the first time measured in the flow rate range. Here, since the pressure value measured a predetermined number of times from the first time is a value measured immediately after the installation of the regulator diagnostic system, there is very little possibility that an abnormality has occurred in the child regulator. This is the value when the vessel is normal. Therefore, the predetermined value can be calculated when the child adjuster is normal.

  In the regulator diagnosis system according to the present invention, the abnormality diagnosis unit may be configured such that the difference between the pressure value measured in the flow rate range and the predetermined value stored in the storage unit is equal to or greater than a predetermined value. It is preferable to diagnose that the regulator is abnormal.

  According to this regulator diagnostic system, when the difference between the pressure value measured in the flow rate range and the predetermined value is equal to or greater than a specified value, the slave regulator is diagnosed as abnormal. Here, when an abnormality occurs in the child adjuster, the adjustment pressure tends to decrease. For this reason, when an abnormality occurs in the slave adjuster, the difference from the adjustment pressure when the slave adjuster is normal increases. Therefore, when the difference between the pressure value measured in the flow rate range and the predetermined value is greater than or equal to the specified value, the child adjuster can be diagnosed more accurately by diagnosing that the child adjuster is abnormal. .

  Further, the regulator diagnostic system of the present invention is provided in the main flow path for supplying fuel gas from the gas supply source to the plurality of houses, the bypass flow path for bypassing the main flow path, and the main flow path. A parent adjuster, a child adjuster that is provided in the bypass flow path and is set to have an adjustment pressure higher than the adjustment pressure of the parent adjuster, and an adjuster diagnostic device that diagnoses the child adjuster, The regulator diagnosing device calculates a predetermined value based on a pressure value measured in a predetermined small flow rate region in a flow rate range equal to or less than a maximum flow rate value of the fuel gas flowing only through the slave regulator. The difference between the predetermined value calculating means and the pressure value measured in the predetermined flow area that is equal to or larger than the small flow area in the flow range and the predetermined value calculated by the predetermined value calculating means is specified. If it is less than or equal to And abnormality determination means for child regulator is diagnosed to be abnormal, and further comprising a.

  According to this regulator diagnostic system, a predetermined value is calculated based on a pressure value measured in a predetermined small flow rate region in the flow rate range, and the predetermined value is greater than or equal to the small flow rate region in the flow rate range. When the difference between the pressure value measured in the predetermined flow rate range and the calculated predetermined value is equal to or less than the specific value, the child adjuster is diagnosed as abnormal. Here, when an abnormality occurs in the slave adjuster, the pressure value in a predetermined flow rate region equal to or higher than the small flow rate region also decreases in the same manner as the small flow rate region. However, when the pressure value in the predetermined flow rate region decreases to some extent, the decrease tends to stop midway due to the relationship with the parent regulator. For this reason, although the pressure value measured in the small flow rate range decreases, the phenomenon that the pressure value decreases in the predetermined flow rate range stops, and the difference between the two tends to be small when the slave regulator is abnormal. Therefore, the child adjuster can be diagnosed more accurately by making the diagnosis as described above.

  In addition, the regulator diagnostic device of the present invention is provided in a bypass channel that bypasses a main channel that supplies fuel gas from a gas supply source to a plurality of houses, and a parent regulator provided in the main channel is provided. A predetermined value based on a pressure value measured in a predetermined small flow rate region in a flow rate range equal to or less than the maximum flow rate value of the fuel gas flowing only through the sub regulator that is set higher than the adjustment pressure. A predetermined value calculation means for calculating the pressure value, a pressure value measured in a predetermined flow area that is equal to or higher than the small flow area in the flow range, and a predetermined value calculated by the predetermined value calculation means An abnormality determining means for diagnosing that the child adjuster is abnormal when the difference is equal to or less than a specific value is provided.

  According to this regulator diagnostic device, the predetermined value is calculated based on the pressure value measured in a predetermined small flow rate region in the flow rate range, and the predetermined value is greater than or equal to the small flow rate region in the flow rate range. When the difference between the pressure value measured in the predetermined flow rate range and the calculated predetermined value is equal to or less than the specific value, the child adjuster is diagnosed as abnormal. Here, when an abnormality occurs in the slave adjuster, the pressure value in a predetermined flow rate region equal to or higher than the small flow rate region also decreases in the same manner as the small flow rate region. However, when the pressure value in the predetermined flow rate region decreases to some extent, the decrease tends to stop midway due to the relationship with the parent regulator. For this reason, although the pressure value measured in the small flow rate range decreases, the phenomenon that the pressure value decreases in the predetermined flow rate range stops, and the difference between the two tends to be small when the slave regulator is abnormal. Therefore, the child adjuster can be diagnosed more accurately by making the diagnosis as described above.

  The regulator diagnosis method of the present invention is provided in the main flow path for supplying fuel gas from the gas supply source to the plurality of houses, the bypass flow path for bypassing the main flow path, and the main flow path. A regulator diagnosing method of a regulator diagnosing system comprising: a parent regulator; and a child regulator provided in the bypass flow path and set to a regulation pressure higher than the regulation pressure of the parent regulator, A predetermined value calculating step of calculating a predetermined value based on a pressure value measured in a predetermined small flow rate region in a flow rate range equal to or less than a maximum flow rate value of the fuel gas flowing only through the slave adjuster; When the difference between the pressure value measured in the predetermined flow rate range that is equal to or higher than the small flow rate range in the flow rate range and the predetermined value calculated in the predetermined value calculation step is equal to or less than a specific value, The child adjuster is abnormal And having an abnormality determination step of diagnosed as, a.

  According to this regulator diagnostic method, a predetermined value is calculated based on a pressure value measured in a predetermined small flow rate region of the flow rate range, and the predetermined value is greater than or equal to the small flow rate region of the flow rate range. When the difference between the pressure value measured in the predetermined flow rate range and the calculated predetermined value is equal to or less than the specific value, the child adjuster is diagnosed as abnormal. Here, when an abnormality occurs in the slave adjuster, the pressure value in a predetermined flow rate region equal to or higher than the small flow rate region also decreases in the same manner as the small flow rate region. However, when the pressure value in the predetermined flow rate region decreases to some extent, the decrease tends to stop midway due to the relationship with the parent regulator. For this reason, although the pressure value measured in the small flow rate range decreases, the phenomenon that the pressure value decreases in the predetermined flow rate range stops, and the difference between the two tends to be small when the slave regulator is abnormal. Therefore, the child adjuster can be diagnosed more accurately by making the diagnosis as described above.

  According to the present invention, it is possible to provide a regulator diagnostic system, a regulator diagnostic device, and a regulator diagnostic method that can diagnose a child regulator.

It is a block diagram of the gas supply system containing the regulator diagnostic system which concerns on embodiment of this invention. It is a graph which shows the pressure-flow rate characteristic in the gas supply system shown in FIG. 1, Comprising: The case where a child regulator is normal is shown. It is a graph which shows the pressure-flow rate characteristic in the gas supply system shown in FIG. 1, Comprising: The case where a sub-regulator is abnormal is shown. It is a block diagram which shows the detail of the regulator diagnostic apparatus shown in FIG. It is a flowchart which shows the regulator diagnostic method by the regulator diagnostic system shown in FIG. 1, and has shown the process about calculation and storage of a predetermined value. It is a flowchart which shows the regulator diagnostic method by the regulator diagnostic system shown in FIG. 1, and has shown the diagnostic process based on the difference with the memorize | stored predetermined value. It is a flowchart which shows the regulator diagnostic method by the regulator diagnostic system shown in FIG. 1, and has shown the process about calculation and storage of a predetermined value. It is a flowchart which shows the regulator diagnostic method by the regulator diagnostic system shown in FIG. 1, and has shown the diagnostic process based on the difference with the memorize | stored predetermined value.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a gas supply system 1 including a regulator diagnostic system according to an embodiment of the present invention. In the following, the gas supply system 1 that supplies LP gas as fuel gas will be described as an example. However, the present invention is not limited to this, and the gas supply system 1 may supply city gas.

  The gas supply system 1 is a housing facility that supplies fuel gas from a gas cylinder (gas supply source) 110 to a plurality of houses 2. The gas supply system 1 includes a regulator diagnostic system 100 and a house-side facility 200. The regulator diagnostic system 100 includes a gas cylinder 110, a gas flow path 120, pressure regulators 130 to 150, and a regulator diagnostic device 160.

  The gas channel 120 is a channel that continues from the gas cylinder 110 to the plurality of houses 2, and includes a main channel 121 and a bypass channel 122. The main channel 121 is a main channel that supplies fuel gas from the gas cylinder 110 to the plurality of houses 2. The bypass flow path 122 bypasses the main flow path 121, and both ends are connected to the main flow path 121.

  The pressure regulators 130 to 150 are provided on the gas flow path 120 and adjust the downstream gas pressure by two states, a closed state and an open state. Among these, the former regulator 130 is provided on the gas cylinder 110 side. The parent adjuster 140 is provided in the main channel 121. Specifically, the parent adjuster 140 is provided in a portion of the main channel 121 that is bypassed by the bypass channel 122. The child adjuster 150 is provided in the bypass flow path 122 and has an adjustment pressure set higher than the adjustment pressure of the parent adjuster 140. The adjuster diagnosis device 160 is provided on the bypass flow path 122 in the gas flow path 120 and diagnoses whether the child adjuster 150 is normal or abnormal.

  The house-side facility 200 includes a plurality of individual gas passages 210, a plurality of valves 220, a plurality of gas meters 230, and a plurality of gas appliances 240. The plurality of individual gas passages 210 supplies the fuel gas flowing through the gas passage 120 to the plurality of houses 2. The plurality of individual gas passages 210 are branched from the gas passage 120 to supply fuel gas to the plurality of houses 2 respectively.

  The valve 220 is provided at an upstream portion of each individual gas flow path 210. By opening and closing the valve 220, a resident of each house 2 can draw fuel gas into the home.

  The gas meter 230 measures the flow rate of the fuel gas and displays the integrated flow rate. The plurality of gas appliances 240 are a gas stove, a fan heater, a water heater, a floor heating, a gas table, a gas BF bath, and the like.

  In such a gas supply system 1, the fuel gas with a small flow rate does not flow through the parent regulator 140 side due to a difference in adjustment pressure between the parent regulator 140 and the child regulator 150, and passes through the child regulator 150 side. It will flow. In addition, a large flow rate of fuel gas flows through both the parent regulator 140 and the child regulator 150.

  FIG. 2 is a graph showing the pressure-flow rate characteristics in the gas supply system 1 shown in FIG. 1, and shows a case where the child regulator 150 is normal. As shown in FIG. 2, in the gas supply system 1, a small flow amount of fuel gas flows through the bypass flow path 122 only through the sub regulator 150. At this time, the pressure when the flow rate is 0 L / h is about 3.22 kPa, and the pressure decreases as the flow rate increases. Specifically, the pressure when the flow rate is 180 L / h is about 3.00 kPa. When the flow rate exceeds 180 L / h, the flow rate also flows to the main channel 121 via the parent regulator 140, and the pressure rapidly decreases. As a result, the pressure depends on the parent regulator 140. Thereafter, even if the flow rate is increased, the pressure shows a value of about 2.88 kPa to 2.78 kPa.

  FIG. 3 is a graph showing the pressure-flow rate characteristics in the gas supply system 1 shown in FIG. 1, and shows a case where the child regulator 150 is abnormal. As shown in FIG. 3, when an abnormality occurs in the child adjuster 150, the adjustment pressure decreases. For this reason, for example, as shown in FIG. 3, the pressure when the flow rate is 0 L / h is reduced to about 3.10 kPa (see symbol a). At this time, the pressure when the flow rate reaches 180 L / h is about 2.88 kPa, which is the same as that of the parent regulator 140. Thus, the pressure-flow rate characteristic shows a parallel movement in the direction in which the pressure decreases when the child regulator 150 is abnormal.

  Further, when the child adjuster 150 is further deteriorated or excessively abnormal, the pressure when the flow rate is 0 L / h is reduced to about 3.02 kPa (see symbol b). At this time, assuming parallel movement in the direction in which the pressure decreases, the pressure when the flow rate reaches 180 L / h is about 2.81 kPa. However, in actuality, the fuel gas flows through the parent regulator 140 at a flow rate of about 120 L / h.

  FIG. 4 is a block diagram showing details of the regulator diagnostic device 160 shown in FIG. As shown in FIG. 4, the regulator diagnostic device 160 includes a flow sensor 161, a pressure sensor 162, a determination unit 163, and a storage unit (storage means) 164.

  The flow sensor 161 outputs a measurement signal corresponding to the gas flow rate in the flow path of the regulator diagnostic device 160, and includes an ultrasonic sensor or a flow sensor. The pressure sensor 162 outputs a measurement signal corresponding to the gas pressure in the flow path of the regulator diagnostic device 160, and is constituted by a sensor such as a piezoresistive type or a capacitance type.

  The determination unit 163 performs various determinations in the regulator diagnostic device 160, and executes diagnostic processing of the child regulator 150 based on, for example, a signal from the flow sensor 161 and a signal from the pressure sensor 162. It is.

  The determination unit 163 includes an abnormality diagnosis unit (abnormality diagnosis unit) 163a and a calculation unit (predetermined value calculation unit) 163b.

  The abnormality diagnosis unit 163a diagnoses an abnormality of the child adjuster 150. The abnormality diagnosis unit 163a diagnoses an abnormality of the child adjuster 150 based on a pressure value measured based on a measurement signal from the pressure sensor 162 in a flow rate range equal to or less than the maximum flow rate value. Here, the maximum flow rate value is the maximum flow value of the fuel gas that flows only through the slave adjuster 150. As shown in FIG. 2, when the child adjuster 150 is normal, a flow rate of 180 L / h can flow. Therefore, in this embodiment, the maximum flow rate value is 180 L / h, the flow rate range is 0 L / h to 180 L / h at the maximum, and in this embodiment, it is assumed to be 21 L / h to 150 L / h.

  More specifically, the abnormality diagnosis unit 163a diagnoses the abnormality of the child adjuster 150 based on the difference between the pressure value measured in the flow rate range equal to or less than the maximum flow value and the predetermined value. Here, the predetermined value may be a predetermined value, but is calculated by the calculation unit 163b in the present embodiment.

  The calculation unit 163b calculates a predetermined value. The calculating unit 163b calculates a predetermined value from the pressure value measured in the flow rate range within a predetermined period after the child adjuster 150 is newly installed, that is, when it is normal. At this time, the calculation unit 163b calculates a predetermined value based on the pressure value from the first time to the predetermined number of times measured in the flow rate range. The first pressure value is the first pressure value when the child regulator 150 is in a new state, such as immediately after the regulator diagnostic system 100 is installed. For this reason, for example, the calculation unit 163b calculates the predetermined value based on the pressure values from the first time to the predetermined number of times immediately after the installation of the regulator diagnostic system 100. As described above, the predetermined value is calculated immediately after the installation of the adjuster diagnostic system 100, so that the predetermined value is calculated when the child adjuster 150 is normal.

  Specifically, the calculation unit 163b calculates, as predetermined values, an average value of pressure values from the first time to a predetermined number of times and an average value excluding singular values from the pressure values from the first time to the predetermined number of times. After calculating the predetermined value, the calculation unit 163b stores the predetermined value in the storage unit 164.

  Next, the regulator diagnostic method according to the present embodiment will be described. The diagnosis of the child adjuster 150 is performed in two stages: a process for calculating and storing a predetermined value and a diagnosis process based on a difference between the stored predetermined value.

  FIG. 5 is a flowchart showing a regulator diagnostic method by the regulator diagnostic system 100 shown in FIG. 1, and shows processing for calculating and storing a predetermined value. As shown in FIG. 5, first, the determination unit 163 determines whether or not it is immediately after the installation of the regulator diagnostic system 100 (S11). In step S11, it is determined whether or not it is immediately after installation. However, the present invention is not limited to this, and it may not be immediately after installation as long as the regulator diagnosis system 100 is normal.

  When it is determined that it is not immediately after the installation of the adjuster diagnostic system 100 (S11: NO), the process shown in FIG. 5 ends. On the other hand, when determining that it is immediately after installation of the regulator diagnostic system 100 (S11: YES), the determination unit 163 determines that the flow rate value measured based on the measurement signal from the flow sensor 161 is within the flow rate range (21 L / h). It is determined whether or not (150L / h) (S12).

  When it is determined that the measured flow rate value is not within the flow rate range (S12: NO), the process illustrated in FIG. 5 ends. On the other hand, when it is determined that the measured flow value is within the flow range (S12: YES), the calculation unit 163b measures the pressure based on the measurement signal from the pressure sensor 162 (S13).

  Thereafter, the calculation unit 163b determines whether or not the measurement has been performed a predetermined number of times (for example, 15 times) (S14). Note that the predetermined number of times is preferably variable. If it is determined that the predetermined number of times has not been measured (S14: NO), the process proceeds to step S12. On the other hand, when it is determined that the measurement has been performed a predetermined number of times (S14: YES), the calculation unit 163b calculates the average value PINI of the predetermined number of times (S15). Next, the calculation unit 163b stores the average value PINI as a predetermined value in the storage unit 164 (S16). Thereafter, the process shown in FIG. 5 ends.

  FIG. 6 is a flowchart showing a regulator diagnostic method by the regulator diagnostic system 100 shown in FIG. 1, and shows a diagnostic process based on a difference from a stored predetermined value. As shown in FIG. 6, first, the determination unit 163 determines whether or not the flow value measured based on the measurement signal from the flow sensor 161 is within the flow range (21 L / h to 150 L / h). (S21).

  When it is determined that the measured flow rate value is not within the flow rate range (S21: NO), the process illustrated in FIG. 6 ends. On the other hand, when it is determined that the measured flow value is within the flow range (S21: YES), the abnormality diagnosis unit 163a measures the pressure based on the measurement signal from the pressure sensor 162 (S22).

  Thereafter, the abnormality diagnosis unit 163a determines whether or not the measurement has been performed a predetermined number of times (for example, 15 times) (S23). The predetermined number of times is desirably variable, and the number of times may not be the same as the predetermined number of times shown in step S14 of FIG. If it is determined that the predetermined number of times has not been measured (S23: NO), the process proceeds to step S21. On the other hand, when it is determined that the predetermined number of times has been measured (S23: YES), the abnormality diagnosis unit 163a calculates the average value P for the predetermined number of times (S24).

  Next, the abnormality diagnosing unit 163a determines whether or not the difference between the predetermined value PINI stored in step S16 in FIG. 5 and the average value P calculated in step S24 is a specified value (for example, 100 Pa) or more. (S25). That is, the abnormality diagnosis unit 163a determines whether or not the predetermined value PINI−the average value P ≧ 100 Pa.

  When it is determined that the predetermined value PINI−average value P ≧ 100 Pa (S25: YES), the abnormality diagnosis unit 163a determines that the child adjuster 150 is abnormal (S26). Thereafter, the process shown in FIG. 6 ends. On the other hand, when it is determined that the predetermined value PINI−average value P ≧ 100 Pa is not satisfied (S25: NO), the abnormality diagnosis unit 163a determines that the child adjuster 150 is normal (S27). Thereafter, the process shown in FIG. 6 ends. When the child adjuster 150 is diagnosed as abnormal, it is desirable to notify the gas management center by communication.

  Thus, according to the regulator diagnostic system 100, the regulator diagnostic device 160, and the regulator diagnostic method according to the present embodiment, in a flow rate range equal to or less than the maximum flow rate value of the fuel gas flowing only through the slave regulator 150. An abnormality of the child adjuster 150 is diagnosed based on the difference between the measured pressure value and a predetermined value. Here, when an abnormality occurs in the child adjuster 150, the adjustment pressure tends to decrease. For this reason, the pressure value measured in the flow rate range also decreases, and the abnormality of the child adjuster 150 can be diagnosed by comparing this pressure value with a predetermined value.

  Further, in order to calculate a predetermined value from a pressure value measured in a flow rate range within a predetermined period after the child regulator 150 is newly installed, that is, when the child regulator 150 is normal, the measured pressure is measured. The value is compared with a predetermined value when the child adjuster 150 is normal, and an abnormality of the child adjuster 150 can be diagnosed.

  Moreover, a predetermined value is calculated based on the pressure value of the predetermined number of times from the first time measured in the flow rate range. Here, since the measured pressure value from the first time to the predetermined number of times is a value measured immediately after the installation of the regulator diagnostic system 100, the possibility that an abnormality has occurred in the child regulator 150 is extremely small. This can be said to be a value when the child adjuster 150 is normal. Accordingly, the predetermined value can be calculated when the child adjuster 150 is normal.

  Further, when the difference between the pressure value measured in the flow rate range and the predetermined value is greater than or equal to the specified value, the child adjuster 150 is diagnosed as abnormal. Here, when an abnormality occurs in the child adjuster 150, the adjustment pressure tends to decrease. For this reason, when abnormality occurs in the child adjuster 150, the difference from the adjustment pressure when the child adjuster 150 is normal increases. Therefore, when the difference between the pressure value measured in the flow rate range and the predetermined value is equal to or greater than the specified value, the child adjuster 150 is diagnosed as being abnormal, thereby diagnosing the child adjuster 150 with higher accuracy. Can do.

  Next, the regulator diagnostic system 100 according to the second embodiment will be described. The adjuster diagnostic system 100 according to the second embodiment is the same as that of the first embodiment, but the configuration and processing contents are partially different.

  The diagnostic concept of the child adjuster 150 according to the second embodiment will be described with reference to FIG. As shown in FIG. 3, when the child regulator 150 is normal, the pressure when the flow rate is 0 L / h is about 3.22 kPa, and the pressure when the flow rate is 180 L / h is about 3.00 kPa. is there. For this reason, the difference between the two is 0.22 kPa.

  In addition, when the child adjuster 150 is abnormal (see symbol a), the adjustment pressure decreases. That is, the pressure when the flow rate is 0 L / h is about 3.10 kPa, and the pressure when the flow rate is 180 L / h is about 2.88 kPa. For this reason, the difference between the two is 0.22 kPa.

  Further, when the child regulator 150 is further deteriorated or excessively abnormal (see symbol b), the pressure when the flow rate is 0 L / h is about 3.02 kPa, and the pressure when the flow rate is 180 L / h is About 2.88 kPa. That is, since the fuel gas flows through the parent regulator 140 at a stage where the flow rate is about 120 L / h, the pressure when the flow rate is 180 L / h is about 2.88 kPa depending on the parent regulator 140. Therefore, the difference between the two is 0.14 kPa.

  Here, when deterioration of the child adjuster 150 proceeds or an excessive abnormality occurs, the pressure difference between the flow rate of 0 L / h and the flow rate of 180 L / h becomes small. The regulator diagnosing device 160 according to the second embodiment diagnoses an abnormality of the child regulator 150 by utilizing the fact that the pressure difference becomes small.

  Please refer to FIG. In the second embodiment, the calculation unit 163b measures a pressure value in a predetermined small flow rate range (for example, 21 L / h to 50 L / h) in the flow rate range, and periodically calculates a predetermined value from the measured pressure value. To do. That is, the calculation unit 163b periodically executes a process of measuring the pressure value a predetermined number of times and calculating the predetermined value, such as every month or every few days. In addition, the calculation unit 163b causes the storage unit 164 to store a predetermined value that is periodically calculated. For this reason, the predetermined value is periodically updated in the second embodiment.

  The abnormality diagnosis unit 163a performs measurement in a predetermined value that is periodically updated in the storage unit 164 and a predetermined flow rate range (for example, 100 L / h to 150 L / h) that is greater than or equal to a small flow rate range in the flow rate range. When the difference from the measured pressure value is a specific value (for example, 50 Pa) or less, the child adjuster 140 is diagnosed as abnormal. Here, as described with reference to FIG. 3, when an abnormality occurs in the child adjuster 150, the pressure values in the small flow rate region and the predetermined flow rate region tend to decrease similarly. However, when the pressure value in the predetermined flow rate region decreases to some extent, the decrease tends to stop midway due to the relationship with the parent regulator 140. For this reason, although the pressure value measured in the small flow rate range decreases, the phenomenon that the pressure value decreases in the predetermined flow rate range stops, and the difference between the two tends to be small when the child regulator 140 is abnormal. Therefore, the child adjuster 140 can be diagnosed by making a diagnosis as described above.

  Next, a regulator diagnostic method according to the second embodiment will be described. FIG. 7 is a flowchart showing the adjuster diagnosis method by the adjuster diagnosis system 100 shown in FIG. 1, and shows processing for calculating and storing a predetermined value. As shown in FIG. 7, first, the determination unit 163 determines whether or not a predetermined time has elapsed since the previous predetermined value was updated (S31). That is, it is determined whether it is a periodic update timing of a predetermined value.

  When it is determined that the specified time has not elapsed since the predetermined value was updated last time (S31: NO), the processing shown in FIG. 7 ends. On the other hand, when it is determined that the specified time has elapsed since the predetermined value was updated last time (S31: YES), the determination unit 163 has a flow rate value measured based on the measurement signal from the flow sensor 161 in the small flow rate region (21L). / H to 50 L / h) is determined (S32).

  When it is determined that the measured flow rate value is not included in the small flow rate range (S32: NO), the process illustrated in FIG. 7 ends. On the other hand, when it is determined that the measured flow value is included in the small flow rate range (S32: YES), the calculation unit 163b measures the pressure based on the measurement signal from the pressure sensor 162 (S33).

  Thereafter, the calculation unit 163b determines whether or not the measurement has been performed a predetermined number of times (for example, 15 times) (S34). Note that the predetermined number of times is preferably variable. If it is determined that the predetermined number of times has not been measured (S34: NO), the process proceeds to step S32. On the other hand, when it is determined that the measurement has been performed a predetermined number of times (S34: YES), the calculation unit 163b calculates the average value PA for the predetermined number of times (S35). Next, the calculation unit 163b stores the average value PA as a predetermined value in the storage unit 164 (S36). Thereafter, the process shown in FIG. 7 ends.

  FIG. 8 is a flowchart showing a regulator diagnostic method by the regulator diagnostic system 100 shown in FIG. 1, and shows a diagnostic process based on a difference from a stored predetermined value. As shown in FIG. 8, first, the determination unit 163 determines whether or not the flow rate value measured based on the measurement signal from the flow rate sensor 161 is included in a predetermined flow rate range (100 L / h to 150 L / h). (S41).

  When it is determined that the measured flow rate value is not included in the predetermined flow rate range (S41: NO), the process illustrated in FIG. 8 ends. On the other hand, when it is determined that the measured flow rate value is included in the predetermined flow rate range (S41: YES), the abnormality diagnosis unit 163a measures the pressure based on the measurement signal from the pressure sensor 162 (S42).

  Thereafter, the abnormality diagnosis unit 163a determines whether or not the measurement has been performed a predetermined number of times (for example, 15 times) (S43). The predetermined number of times is desirably variable, and the number of times may not be the same as the predetermined number of times shown in step S34 of FIG. If it is determined that the predetermined number of times has not been measured (S43: NO), the process proceeds to step S41. On the other hand, when it is determined that the predetermined number of times has been measured (S43: YES), the abnormality diagnosis unit 163a calculates the average value PB of the predetermined number of times (S44).

  Next, the abnormality diagnosis unit 163a determines whether or not the difference between the predetermined value PA stored in step S36 of FIG. 7 and the average value PB calculated in step S44 is equal to or less than a specific value (for example, 50 Pa). (S45). That is, the abnormality diagnosis unit 163a determines whether or not the predetermined value PA−the average value PB ≦ 50 Pa.

  When it is determined that the predetermined value PA−the average value PB ≦ 50 Pa (S45: YES), the abnormality diagnosis unit 163a determines that the child adjuster 150 is abnormal (S46). Thereafter, the process shown in FIG. 8 ends. On the other hand, when it is determined that the predetermined value PA−the average value PB ≦ 50 Pa is not satisfied (S45: NO), the abnormality diagnosis unit 163a determines that the child adjuster 150 is normal (S47). Thereafter, the process shown in FIG. 8 ends. When the child adjuster 150 is diagnosed as abnormal, it is desirable to notify the gas management center by communication.

  Thus, according to the adjuster diagnostic system 100, the adjuster diagnostic device 160, and the adjuster diagnostic method according to the second embodiment, the abnormality of the child adjuster 150 can be diagnosed as in the first embodiment. it can.

  Further, a predetermined value is calculated based on a pressure value measured in a predetermined small flow rate range in the flow rate range, and is measured in a predetermined flow rate range that is equal to or higher than the small flow rate range in the flow rate range. When the difference between the measured pressure value and the calculated predetermined value is equal to or less than the specific value, the child adjuster 150 is diagnosed as abnormal. Here, when an abnormality occurs in the slave adjuster 150, the pressure value in a predetermined flow rate region equal to or higher than the small flow rate region also decreases in the same manner as the small flow rate region. However, when the pressure value in the predetermined flow rate region decreases to some extent, the decrease tends to stop midway due to the relationship with the parent regulator 140. For this reason, although the pressure value measured in the small flow rate range decreases, the phenomenon that the pressure value decreases in the predetermined flow rate range stops, and the difference between the two tends to be small when the child regulator 150 is abnormal. Therefore, the child adjuster 150 can be diagnosed more accurately by performing the diagnosis as described above.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment, You may add a change in the range which does not deviate from the meaning of this invention, and combines each embodiment. Also good.

  For example, although the measurement is performed a predetermined number of times in the above embodiment, the measurement interval may be one hour or one day. Moreover, in the said embodiment, when it is judged as "YES" in step S25, S45 shown in FIG. 5, it is judged that the child adjuster 150 is abnormal, but "YES" continuously several times. If it is determined, it may be determined that the child adjuster 150 is abnormal, or if the number of times determined as “YES” reaches a predetermined number of times, the child adjuster 150 is abnormal. You may judge that there is.

DESCRIPTION OF SYMBOLS 1 ... Gas supply system 2 ... House 100 ... Regulator diagnostic system 110 ... Gas cylinder (gas supply source)
DESCRIPTION OF SYMBOLS 120 ... Gas flow path 121 ... Main flow path 122 ... Bypass flow path 130 ... Original regulator 140 ... Parent regulator 150 ... Child regulator 160 ... Regulator diagnostic device 161 ... Flow rate sensor 162 ... Pressure sensor 163 ... Judgment part 163a ... Abnormality diagnosis unit (abnormality diagnosis means)
163b ... Calculation unit (predetermined value calculation means)
164 ... Storage section (storage means)
200 ... Housing-side equipment 210 ... Multiple individual gas flow paths 220 ... Multiple valves 230 ... Multiple gas meters 240 ... Multiple gas appliances

Claims (7)

A main flow path for supplying fuel gas from a gas supply source to a plurality of houses,
A bypass channel bypassing the main channel;
A parent adjuster provided in the main flow path;
A child adjuster provided in the bypass flow path, the adjustment pressure of which is set higher than the adjustment pressure of the parent adjuster;
A regulator diagnostic device for diagnosing the child regulator; and
The adjuster diagnostic device comprises:
Having abnormality diagnosis means for diagnosing abnormality of the child adjuster based on a difference between a pressure value measured in a flow rate range equal to or less than a maximum flow rate value of the fuel gas flowing only through the child adjuster and a predetermined value. A regulator diagnostic system characterized by The adjuster diagnostic apparatus includes: a predetermined value calculation unit that calculates the predetermined value; and a storage unit that stores the predetermined value calculated by the calculation unit,
The said predetermined value calculation means calculates the said predetermined value from the pressure value measured in the said flow range within the predetermined period after the said child regulator was newly installed. Regulator diagnostic system. The regulator diagnostic system according to claim 2, wherein the predetermined value calculation means calculates the predetermined value based on a pressure value from the first time to a predetermined number of times measured in the flow rate range. The abnormality diagnosing means diagnoses that the child adjuster is abnormal when a difference between a pressure value measured in the flow rate range and a predetermined value stored in the storage means is a predetermined value or more. The regulator diagnostic system according to claim 3, wherein A main flow path for supplying fuel gas from a gas supply source to a plurality of houses,
A bypass channel bypassing the main channel;
A parent adjuster provided in the main flow path;
A child adjuster provided in the bypass flow path, the adjustment pressure of which is set higher than the adjustment pressure of the parent adjuster;
A regulator diagnostic device for diagnosing the child regulator; and
The adjuster diagnostic device comprises:
A predetermined value calculating means for calculating a predetermined value based on a pressure value measured in a predetermined small flow rate region in a flow rate range equal to or lower than the maximum flow rate value of the fuel gas flowing only through the slave adjuster;
When the difference between the pressure value measured in a predetermined flow rate range that is equal to or greater than the small flow rate range in the flow rate range and the predetermined value calculated by the predetermined value calculation means is less than a specific value An abnormality determining means for diagnosing that the child adjuster is abnormal;
A regulator diagnostic system, further comprising: Provided in the bypass flow path that bypasses the main flow path for supplying fuel gas from the gas supply source to the plurality of houses, and the adjustment pressure is set higher than the adjustment pressure of the parent regulator provided in the main flow path A predetermined value calculating means for calculating a predetermined value based on a pressure value measured in a predetermined small flow rate region in a flow rate range equal to or less than the maximum flow rate value of the fuel gas flowing only through the slave regulator; and the flow rate When the difference between the pressure value measured in the predetermined flow rate range that is greater than or equal to the small flow rate range in the range and the predetermined value calculated by the predetermined value calculation means is equal to or less than a specific value, An abnormality determination means for diagnosing that the child adjuster is abnormal;
A regulator diagnostic apparatus comprising: A main flow path for supplying fuel gas from a gas supply source to a plurality of houses,
A bypass channel bypassing the main channel;
A parent adjuster provided in the main flow path;
A regulator adjuster provided in the bypass flow path and having a regulator pressure set higher than that of the master regulator, and a regulator diagnostic method for a regulator diagnostic system comprising:
A predetermined value calculating step for calculating a predetermined value based on a pressure value measured in a predetermined small flow rate region in a flow rate range equal to or less than a maximum flow rate value of the fuel gas flowing only through the slave adjuster;
When the difference between the pressure value measured in the predetermined flow rate range that is equal to or higher than the small flow rate range in the flow rate range and the predetermined value calculated in the predetermined value calculation step is equal to or less than a specific value. An abnormality determination step for diagnosing that the child adjuster is abnormal;
A regulator diagnostic method characterized by comprising:

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