JP2010140189A - Secondary pressure monitoring device and secondary pressure discrimination method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a useless processing or operation from being performed by recognizing a state that a secondary pressure is rising due to not the failure of a pressure regulator but other factors. <P>SOLUTION: The secondary pressure monitoring device 17, which monitors a secondary pressure in a pressure regulation facility in which a pressure regulator 2 for freely adjusting the secondary pressure of a fluid feeding path 1 to a set pressure is installed in the middle of the fluid feeding path 1, includes a pressure rising state determination means 19 for determining whether or not it is a normal pressure rising state that the secondary pressure rises due to one or both of the change of the atmosphere of the fluid feeding path 1 and the change of the temperature of the fluid of the fluid feeding path 1 when the secondary pressure rises. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a secondary pressure monitor for monitoring a secondary pressure in a pressure regulator in which a pressure regulator capable of adjusting a secondary pressure of a fluid supply path to a set pressure is provided in the middle of the fluid supply path. The present invention relates to an apparatus and a secondary pressure determination method.

In the pressure regulating equipment as described above, for example, a plurality of demands are obtained by branching the downstream side of the fluid pressure regulator to a plurality of branch paths and connecting each of the plurality of branch paths to each consumer. It is configured to supply a fluid such as natural gas to the house. Then, by adjusting the secondary side pressure downstream of the pressure regulator to a set pressure lower than the upstream primary pressure, the fluid pressure supplied to each consumer is within a certain range. ing.
In such a pressure regulator, when the pressure regulator is stopped and the downstream fluid is held at a constant volume, the secondary pressure is essentially constant, but if a leak occurs due to a malfunction of the pressure regulator, The side pressure will increase. Therefore, in the conventional secondary pressure monitoring device, the secondary pressure is monitored to determine whether or not the secondary pressure is equal to or higher than the abnormal set value. Then, if it is determined that the secondary side pressure is equal to or higher than the abnormal set value, for example, a safety mechanism that performs an abnormal process such as operating a shut-off valve disposed on the primary side of the fluid supply path is provided ( For example, see Patent Document 1.)
After performing the abnormal process, dispatch an operator to the place where the pressure regulator is installed, perform maintenance work such as replacement or correction of the pressure regulator, and then perform restoration work such as returning the shut-off valve. To do.

JP 2006-283833 A

  In the conventional secondary pressure monitoring device, when the secondary pressure becomes equal to or higher than the abnormal set value, the abnormal process is uniformly performed. As a result, even if the pressure on the secondary side rises due to other factors such as a change in the atmosphere of the fluid supply path, not the failure of the pressure regulator, the abnormal processing is not performed even when the secondary side pressure exceeds the abnormal set value. Will be done. When the secondary pressure increases due to other factors such as a change in the atmosphere of the fluid supply path, it is necessary to perform an abnormality process different from the case of the pressure regulator failure. Therefore, in the conventional apparatus, although the pressure regulator is not broken, abnormal processing corresponding to the pressure regulator failure is performed, and an operator is dispatched to the installation location of the pressure regulator, which is troublesome. It was.

  The present invention has been made paying attention to such a point, and its purpose is not a failure of the pressure regulator, but a recognition of a state in which the secondary side pressure is rising due to other factors, and wasteful processing or It is in providing a secondary pressure monitoring device and a secondary pressure discrimination method capable of preventing work from being performed.

In order to achieve this object, the characteristic configuration of the secondary pressure monitoring device according to the present invention is such that a pressure regulator capable of adjusting the secondary pressure of the fluid supply path to a set pressure is provided in the middle of the fluid supply path. A secondary pressure monitoring device for monitoring the secondary pressure in the pressure regulating equipment,
Whether the secondary pressure increases normally due to one or both of the change in the atmosphere of the fluid supply path and the temperature change of the fluid in the fluid supply path when the secondary pressure increases There is a boosting state determining means for determining whether or not.

For example, when the temperature of the atmosphere of the fluid supply path rises, the temperature of the fluid itself flowing through the fluid supply path also rises, and the secondary side pressure rises due to the temperature expansion. Further, when the atmospheric pressure in the atmosphere of the fluid supply path decreases, the secondary gauge pressure of the fluid increases. Regarding the increase in the fluid temperature, in addition to the increase in the temperature of the atmosphere, for example, heating of the fluid by direct sunlight can be considered, and the tendency of heating by direct sunlight can be replaced by the sunlight rate. Therefore, it is conceivable that there is a correlation between the change in the sunshine rate and the increase in the secondary pressure. In addition, when the fluid temperature is reduced by the pressure reduction by the pressure regulator, if the load is removed immediately after that and the pressure regulator is stopped, the secondary fluid temperature rises and the secondary pressure rises.
In view of this, the secondary pressure monitoring apparatus of the present invention is provided with a pressure increase state determination unit, and determines whether the pressure is in a normal pressure increase state by detecting a change in the atmosphere of the fluid supply path or a temperature change of the fluid in the fluid supply path. . Thereby, even if the secondary side pressure becomes equal to or higher than the abnormal set value, it can be recognized that the factor is the normal boosting state. Therefore, the operator can recognize that the boosting state is normal, so in the normal boosting state, even if the secondary side pressure is higher than the abnormal set value, abnormal processing corresponding to the pressure regulator failure Can be prevented, and dispatching an operator to a location where the pressure regulator is installed can also be prevented. As a result, it is possible to recognize that the secondary side pressure is rising due to other factors rather than a failure of the pressure regulator, and prevent unnecessary processing and work from being performed.

  A further characteristic configuration of the secondary pressure monitoring device according to the present invention is that the operation of the shut-off means disposed on the primary side of the fluid supply path is determined when the boosted state determining unit determines that the normal boosted state is established. Is provided with a shut-off prohibiting means for outputting operation prohibiting information for prohibiting the operation or the operation of the shut-off means.

  According to this feature configuration, even when the secondary pressure is higher than the abnormal set value in the normal boost state, the safety prohibition means performs the abnormality process by prohibiting the operation of the cutoff means. Can be prevented automatically. Further, even when the shut-off prohibiting means outputs the operation prohibition information in the normal boosting state, the abnormal processing can be prevented from being performed by outputting the operation prohibition information to the safety mechanism or the operator. Therefore, it is possible to reliably prevent the execution of the abnormality process in the normal boosting state.

  In a further characteristic configuration of the secondary pressure monitoring apparatus according to the present invention, the pressure increase state determination means determines whether or not the normal pressure increase state by monitoring a temperature change in the atmosphere of the fluid supply path. It is in the point comprised as follows.

  According to this characteristic configuration, the pressure increase state determination unit can detect that the temperature of the atmosphere of the fluid supply path is rising due to, for example, an increase in temperature by monitoring the temperature change of the atmosphere of the fluid supply path. it can. Therefore, the boosting state determination means can accurately detect that the temperature of the atmosphere of the fluid supply path has risen, and can accurately determine that it is in the normal boosting state due to the temperature increase of the atmosphere.

  In a further characteristic configuration of the secondary pressure monitoring apparatus according to the present invention, the pressure increase state determination means determines whether or not the normal pressure increase state by monitoring a pressure change in the atmosphere of the fluid supply path. It is in the point comprised as follows.

  According to this characteristic configuration, the pressure increase state determination means monitors the pressure change in the atmosphere of the fluid supply path, for example, to confirm that the gauge pressure of the fluid inside the fluid supply path is increased due to a decrease in atmospheric pressure or the like. Can be caught. Therefore, the boosting state determination means can accurately determine that the pressure is in the normal boosting state due to a decrease in atmospheric pressure.

The characteristic configuration of the secondary side pressure discrimination method according to the present invention is the pressure regulating equipment in which a pressure regulator capable of adjusting the secondary side pressure of the fluid supply path to a set pressure is provided in the middle of the fluid supply path. A secondary pressure discriminating method for monitoring the side pressure,
Whether the secondary pressure increases normally due to one or both of the change in the atmosphere of the fluid supply path and the temperature change of the fluid in the fluid supply path when the secondary pressure increases The point is to determine whether.

  According to this characteristic configuration, as described in the characteristic configuration of the secondary-side pressure monitoring apparatus according to the present invention, whether the pressure is in a normal boosted state by capturing the change in the atmosphere of the fluid supply path or the temperature change of the fluid in the fluid supply path. Whether or not the secondary pressure is equal to or higher than the abnormal set value can be recognized as the cause of the normal pressure increase state. Therefore, it is possible to recognize that the secondary side pressure is rising due to other factors, not a failure of the pressure regulator, and prevent unnecessary processing and work from being performed.

An embodiment of a secondary pressure monitoring device according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the secondary pressure monitoring apparatus includes a pressure regulator 2 in which a pressure regulator 2 capable of adjusting the secondary pressure of the fluid supply path 1 to a set pressure is provided in the middle of the fluid supply path 1. The secondary pressure of the pressure regulator 2 is monitored.

  Although not shown in the figure, for example, the pressure regulator is branched downstream from the pressure regulator 2 of the fluid supply path 1 into a plurality of branch paths, and each of the plurality of branch paths is connected to each consumer. Thus, a fluid such as natural gas is supplied to a plurality of consumers. Then, the secondary pressure on the downstream side is adjusted by the pressure regulator 2 to a set pressure lower than the primary pressure on the upstream side. On the primary side upstream of the pressure regulator 2 in the fluid supply path 1, a shutoff valve 3 is provided as a shutoff means for shutting off the supply of fluid to the pressure regulator 2.

The main governor 4 as the pressure regulator 2 is provided in the fluid supply path 1, and the pilot governor 5 is branched from the upstream side of the fluid supply path 1 with respect to the main governor 4, and the fluid supply path 1 with respect to the main governor 4. It is provided in the branch joint channel 6 which joins the downstream side.
The main governor 4 is configured to open and close the valve body 8 by moving the valve body 8 with a diaphragm 7. The diaphragm 7 is urged by a spring 9 so as to move the valve body 8 to the open side. A branch joint channel 6 is connected to the pressure detection chamber 10 partitioned by the diaphragm 7. In the branch joint channel 6, a throttle 11 is provided between the branch point 6 a of the fluid supply path 1 and the branch connection point 6 b branched and connected to the pressure detection chamber 10.
Similar to the main governor 4, the pilot governor 5 is configured to open and close the pilot valve body 13 by moving the pilot valve body 13 with the pilot diaphragm 12. The pilot diaphragm 12 is urged by a pilot spring 14 so as to move the pilot valve body 13 to the open side.

When the secondary pressure of the pressure regulator 2 that is the downstream pressure of the main governor 4 is higher than the set pressure, the pressure of the pilot pressure detection chamber 15 in the pilot governor 5 is high, and the pressure of the pilot spring 14 is increased by the pressure. The pilot valve body 13 moves to the closing side against the urging force. As a result, the pressure in the pressure detection chamber 10 of the main governor 4 becomes a primary pressure on the upstream side of the main governor 4 in the fluid supply path 1, and the valve body 8 closes against the biasing force of the spring 9. Move to. As a result, the pressure regulator 2 stops and no fluid is supplied to the secondary side.
Conversely, when the secondary pressure of the pressure regulator 2 is lower than the set pressure, the pilot valve body 13 moves to the open side by the biasing force of the pilot spring 14. Thereby, in the branch joint flow path 6, the flow rate of the fluid is restricted by the restriction 11, so that the fluid in the pressure detection chamber 10 flows toward the pilot governor 5. Therefore, the pressure in the pressure detection chamber 10 decreases and the valve body 8 moves to the open side by the biasing force of the spring 9. As a result, the fluid is supplied to the secondary side, and the secondary side pressure of the pressure regulator 2 is increased and adjusted to the set pressure.

  On the secondary side downstream of the pressure regulator 2 in the fluid supply path 1, a secondary pressure detection sensor 16 that detects the secondary pressure is provided. And the secondary side pressure monitoring apparatus 17 which monitors a secondary side pressure by inputting the detection information of the secondary side pressure detection sensor 16 is provided, and this secondary side pressure monitoring apparatus 17 is this invention. It is the secondary side pressure monitoring apparatus which concerns on this. The secondary pressure monitoring device 17 is configured to input detection information from the secondary pressure detection sensor 16 in real time and monitor the secondary pressure in real time.

  When the pressure regulator 2 is stopped and the downstream fluid is held at a constant volume, the secondary pressure is essentially constant, but if a leak occurs due to a failure of the pressure regulator 2, the secondary pressure increases. become. Therefore, when the secondary pressure monitoring device 17 determines that the secondary pressure is equal to or higher than an abnormal set value (eg, 2.75 or 3.5 KPa), the shut-off valve 3 is actuated to the pressure regulator 2. There is provided a blocking means 18 for performing a blocking process for blocking the supply of the fluid.

  Factors other than failure of the pressure regulator 2 will be described as factors that cause the secondary pressure to rise, not only because of the failure of the pressure regulator 2 but also in other cases. To do. Each of FIGS. 2 to 4 shows the result of actually measuring the secondary pressure in a certain pressure regulating equipment.

FIG. 2 shows the actually measured secondary pressure P1, the temperature T at the location of the pressure regulator 2 in the fluid supply path 1, and the fluid calculated from Boyle-Charles's law assuming that the temperature is the same as the fluid temperature. It is the graph which showed the change with progress of time about each of the calculation pressure P2 in the secondary side of the supply path.
From FIG. 2, it can be seen that the actually measured secondary pressure P1 and the calculated pressure P2 calculated using the air temperature change substantially coincident with each other. Therefore, it can be said that the secondary pressure changes as the temperature changes, and therefore, the temperature change of the atmosphere of the fluid supply path 1 due to the rise in temperature or the like can be considered as a factor that increases the secondary pressure. On the contrary, if the pressure is changed in this way, it can be determined that there is no abnormality in the pressure regulator 2.

FIG. 3 shows the actually measured secondary pressure P3, the atmospheric pressure P4 (for example, the atmospheric pressure data of the Japan Meteorological Agency) at the location of the pressure regulator 2 in the fluid supply path 1, and the fluid supply path 1 calculated using the atmospheric pressure data. It is the graph which showed the change with progress of time about each of the calculation pressure P5 in the secondary side.
It can be seen from FIG. 3 that the actually measured secondary pressure P3 and the calculated pressure P5 calculated using the atmospheric pressure change substantially in agreement. Generally, the secondary pressure is displayed as a gauge pressure, but naturally the secondary pressure changes by the change in atmospheric pressure, so the fluid supply path due to a decrease in atmospheric pressure is the cause of the increase in secondary pressure. The pressure change of the atmosphere of 1 is considered. On the contrary, if the pressure is changed in this way, it can be determined that there is no abnormality in the pressure regulator 2.

FIG. 4 is a graph showing changes over time of one day for each of the actually measured secondary pressure P6 and the sunshine rate Q at the location where the pressure regulator 2 is disposed in the fluid supply path 1. Here, with regard to the sunshine rate, for example, the time from when the center of the sun appears on the eastern horizon until it sinks to the west horizon is defined as the illuminating time, and the following [ 1], the sunshine rate can be obtained.
[Equation 1]
Sunlight rate (%) = Sunlight time / Visible time x 100

  4 that the actually measured secondary pressure P6 increases as the sunshine rate Q increases, and decreases as the sunshine rate Q decreases. Therefore, it can be said that the secondary pressure changes with a change in the sunshine rate. As a factor for increasing the secondary side pressure, fluid heating by direct sunlight can be considered in addition to temperature rise, and the tendency of heating by direct sunlight can be replaced by the sunshine rate. Thus, if there is a correlation between the change in the sunlight rate and the increase in the secondary pressure, it can be determined that there is no abnormality in the pressure regulator 2.

  When the high pressure primary pressure is reduced to a low pressure secondary pressure by the pressure regulator 2, the temperature of the fluid flowing through the fluid supply path 1 changes due to the Joule-Thomson effect. For example, when the pressure regulator 2 causes the fluid to flow at a large flow rate for a long time, if the temperature of the fluid decreases due to the pressure reduction by the pressure regulator 2, if there is no load immediately after that and the pressure regulator 2 stops, the fluid supply path The temperature of the fluid on the secondary side of 1 will rise, and the secondary side pressure will rise by the temperature expansion. Therefore, the temperature change resulting from the pressure reduction of the fluid in the fluid supply path 1 can be considered as a factor that increases the secondary pressure.

From the above, the cause of the increase in the secondary side pressure is not only the failure of the pressure regulator 2, but also the temperature change or pressure change of the atmosphere of the fluid supply path 1, or the fluid in the fluid supply path 1 A case where the temperature is changed is conceivable. Therefore, the secondary side pressure may rise and the secondary side pressure may become an abnormal set value or more due to factors other than the failure of the pressure regulator 2. For example, in the pressure regulating equipment that has performed the measurement shown in FIG. 2, the abnormal set value is, for example, 3.5 KPa, but the secondary pressure P <b> 1 is 3.5 KPa or more as the temperature T rises. Moreover, in the pressure regulation equipment which performed the measurement shown in FIG.3 and FIG.4, although the abnormal setting value is 2.75 KPa, for example, the secondary side pressure P3 and P6 are 2. with the change of the atmospheric | air pressure P4 and the sunlight rate Q. 75 KPa or more.
On the other hand, if the cause of the increase in the secondary pressure is a change in temperature or pressure in the atmosphere of the fluid supply path 1, or a change in temperature of the fluid in the fluid supply path 1, the pressure regulator 2 has failed. Unlike the case of the above, since the amount of pressure increase of the secondary side pressure falls within a certain level, there is no danger of having to shut off the fluid supply to the pressure regulator 2 by performing the shut-off process by the shut-off means 18, It can be handled by other methods such as inspection.

  Therefore, in the secondary side pressure monitoring device 17 according to the present invention, when the secondary side pressure increases, the pressure change and temperature change of the atmosphere in the fluid supply path 1 and the temperature change of the fluid in the fluid supply path 1 are detected. By monitoring, boosting is performed to determine whether or not it is a normal boosting state in which the secondary pressure increases due to one or both of the change in the atmosphere of the fluid supply path 1 and the temperature change of the fluid in the fluid supply path 1 When the state determining unit 19 and the step-up state determining unit 19 determine that a normal boosting state is present, the state determining unit 19 includes a blocking prohibiting unit 20 that prohibits execution of the blocking process by the blocking unit 18. As a result, even when the secondary pressure is equal to or higher than the abnormal set value in the normal pressure increase state, execution of the blocking process by the blocking unit 18 is prohibited, and the blocking process is prevented from being performed wastefully. ing.

  The pressurization state discriminating means 19 includes an atmospheric pressure, an air temperature, an underground temperature, a tube surface temperature of the fluid supply path 1, a sunshine duration and a heat radiation amount of sunlight, a fluid temperature, and a fluid temperature at the location where the pressure regulator 2 is disposed in the fluid supply path 1. The flow rate of the fluid in the pressure regulator 2 or the opening of the pressure regulator 2 and the pressure reduction width by the pressure regulator 2 are acquired in real time, and it is determined whether or not it is in a normal pressure-up state using the acquired various information. Is configured to do.

  For example, when the pressure regulator 2 is stopped, the pressure increase state determination means 19 is such that the secondary pressure detected by the secondary pressure detection sensor 16 is a set value for determination (a value smaller than the abnormal set value). When the pressure increase speed of the secondary pressure detected by the secondary pressure detection sensor 16 becomes equal to or higher than the set speed for determination, it is determined that it is the determination start timing. Then, as shown in FIG. 3, the pressure increase state determination means 19 starts calculation of the calculated pressure (see P5) using the atmospheric pressure acquired in real time, and detects the secondary detected by the secondary pressure detection sensor 16. The change history of the side pressure (see P3) and the calculated change history of the calculated pressure (see P5) are compared. For example, the pressure increase state determination means 19 matches the change history of the secondary pressure and the change history of the calculated pressure until the set time elapses from the determination start timing, or the secondary pressure and the calculated pressure are continuous. If the change histories of the two coincide with each other due to the coincidence over the set number of times, it is assumed that the cause of the increase in the secondary pressure is the change in the pressure of the atmosphere of the fluid supply path 1, and the normal pressure increase state. Is determined.

  Further, at the determination start timing, as shown in FIG. 2, the pressure increase state determination means 19 starts calculation of the calculated pressure (see P2) using the air temperature acquired in real time, and the secondary pressure detection sensor 16 The change history of the detected secondary pressure (see P1) and the calculated change history of the calculated pressure (see P2) are compared. Then, if the change history of the two coincides, the pressurization state determination means 19 assumes that the cause of the increase in the secondary pressure is the temperature change of the atmosphere of the fluid supply path 1 and is in the normal pressurization state. Determine. Here, in addition to using the air temperature, it is possible to use the ground temperature or the pipe surface temperature of the fluid supply path 1 as well as the fluid temperature. In addition, when the fluid supply path 1 is buried in the ground, it is not affected by air temperature and direct sunlight, so only factors other than the air temperature and direct sunlight (such as changes in fluid temperature due to changes in atmospheric pressure or reduced pressure). A certain degree of accuracy can be ensured even if the calculation is performed with.

  Further, the pressurization state determination means 19 obtains the sunshine rate in real time from the sunshine time, compares the change rate of the sunshine rate with the change history of the secondary side pressure detected by the secondary side pressure detection sensor 16, and When the sunshine rate increases, the secondary pressure also increases, and when the sunshine rate decreases, the secondary side pressure also decreases. If so, the factor that the secondary side pressure is rising is determined to be the temperature change of the atmosphere of the fluid supply path 1, and is determined to be in the normal pressure-up state. Here, in addition to the sunshine rate, the amount of heat radiation of sunlight can also be used. In other words, it can be said that the greater the amount of sunlight radiated, the higher the sunshine rate.Therefore, when the amount of sunlight radiated increases, the secondary pressure also increases and when the amount of sunlight radiates decreases, the secondary pressure increases. If the tendency that the amount of heat radiation of sunlight and the secondary side pressure increase and decrease agrees, the cause of the increase in the secondary side pressure is the temperature change of the atmosphere of the fluid supply path 1 As such, it can be determined that the voltage is in a normal boosted state.

Further, the pressure increase state determination means 19 compares the change history of the fluid temperature of the fluid supply path 1 acquired in real time with the change history of the secondary pressure detected by the secondary pressure detection sensor 16 to determine the fluid temperature. If the upward trend of the fluid temperature and the secondary pressure are matched such that the secondary pressure also rises when the pressure rises, the cause of the rise of the secondary pressure is the fluid supply path It is determined that the pressure is normal, assuming that the temperature change of the first fluid.
In addition to using the fluid temperature, the flow rate of the fluid in the pressure regulator 2 or the opening of the pressure regulator 2 and the pressure reduction width by the pressure regulator 2 can be used. As described above, for example, when the pressure regulator 2 causes the fluid to flow at a large flow rate for a long time, the temperature of the fluid decreases due to the pressure reduction by the pressure regulator 2, but immediately after that, the load is removed and the pressure regulator 2 is stopped. For example, the temperature of the fluid on the secondary side of the fluid supply path 1 increases. Therefore, it is possible to determine whether or not the pressure regulator 2 has decompressed the fluid at a large flow rate for a long time, based on the flow rate of the fluid in the pressure regulator 2 or the opening of the pressure regulator 2 and the pressure reduction width by the pressure regulator 2. it can. Immediately after it is determined that the pressure regulator 2 is depressurizing the fluid at a large flow rate for a long time, the flow pressure load disappears and the pressure regulator 2 stops and the secondary side pressure rises, so that the secondary side pressure rises. It can be determined that the increased pressure is due to a temperature change caused by the pressure reduction of the fluid in the fluid supply path 1.

  Here, the pressure increase state discriminating means 19 increases the secondary pressure due to any one of the temperature change of the atmosphere of the fluid supply path 1, the pressure change of the atmosphere of the fluid supply path 1, and the temperature change of the fluid of the fluid supply path 1. However, it is determined that, for example, all of the temperature change of the atmosphere of the fluid supply path 1, the pressure change of the atmosphere of the fluid supply path 1, and the temperature change of the fluid of the fluid supply path 1 When the phenomenon in which the secondary side pressure is rising occurs, it may be determined that the pressure is in the normal boosted state. In addition, for example, when the temperature change of the fluid in the fluid supply path 1 is a top priority condition, and the single condition that the secondary pressure is increased by the temperature change of the fluid in the fluid supply path 1 is satisfied, the normal pressure increase state is established. And when the secondary pressure increases due to both the temperature change in the atmosphere of the fluid supply path 1 and the atmospheric pressure change in the atmosphere of the fluid supply path 1, it is determined that the normal pressure increase state is satisfied when a plurality of conditions are satisfied. You can also As described above, it is possible to set a priority order among a plurality of factors according to the installation status and the like, and to determine whether or not the normal boosting state is set according to the priority order.

[Another embodiment]
(1) In the above embodiment, when it is determined that the secondary side pressure is equal to or higher than the abnormal set value, the cutoff information for shutting off the fluid supply to the pressure regulator 2 by operating the cutoff valve 3 is shown as the cutoff valve. The blocking means 18 can be configured to output the operation of 3 to a remote control device or the like that can be remotely controlled. In this case, when the shut-off prohibiting unit 20 determines that the boosting state discriminating unit 19 is in the normal boosting state, the shut-off prohibiting information for prohibiting the operation of the shut-off valve 3 is output to the remote control device or the like. The

(2) In the above-described embodiment, the pressurization state determination means 19 is configured to detect the atmospheric pressure, the air temperature, the underground temperature, the pipe surface temperature of the fluid supply path 1, the sunlight time, and the sunlight at the location where the pressure regulator 2 is provided in the fluid supply path 1. The amount of heat radiation, the fluid temperature, the flow rate of the fluid in the pressure regulator 2, the opening of the pressure regulator 2, and the pressure reduction width by the pressure regulator 2 are acquired in real time, but it is necessary to acquire all these information Instead, for example, it is possible to acquire only information selected based on the installation conditions of the pressure regulating equipment, and determine whether or not it is in a normal pressure-up state. For example, when the pressure regulation maintenance is installed in a place that is hardly affected by the atmospheric pressure and is easily affected by the air temperature, the fluid supply path such as the air temperature, the underground temperature, and the pipe surface temperature of the fluid supply path 1 Only the information related to the temperature change of the atmosphere 1 can be acquired, and it can be determined whether or not it is in the normal boosting state.

  The present invention provides a pressure regulator that is provided in the middle of the fluid supply path with a pressure regulator that can adjust the secondary side pressure of the fluid supply path to a set pressure. The present invention can be applied to various secondary pressure monitoring devices and secondary pressure determination methods that can recognize a state in which the secondary pressure is rising and prevent unnecessary processing and work from being performed.

Diagram showing schematic configuration of pressure regulating equipment Graph showing changes over time for each of air temperature, secondary pressure and calculated pressure Graph showing changes over time for each of atmospheric pressure, secondary pressure and calculated pressure A graph showing changes in sunshine rate and secondary pressure over time

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluid supply path 2 Pressure regulator 17 Secondary side pressure monitoring apparatus 19 Pressure | voltage rise state determination means 20 Blocking prohibition means

Claims (5)

A secondary pressure monitoring device for monitoring a secondary pressure in a pressure regulator in which a pressure regulator capable of adjusting a secondary pressure of a fluid supply path to a set pressure is provided in the middle of the fluid supply path. ,
Whether the secondary pressure increases normally due to one or both of the change in the atmosphere of the fluid supply path and the temperature change of the fluid in the fluid supply path when the secondary pressure increases A secondary-side pressure monitoring device comprising a boosting state determining means for determining whether or not.   When the boosting state determining means determines that the normal boosted state is present, the operation prohibition information for prohibiting the operation of the shutoff means disposed on the primary side of the fluid supply path or prohibiting the operation of the shutoff means The secondary side pressure monitoring apparatus according to claim 1, further comprising: a shut-off prohibiting unit that outputs   3. The secondary side according to claim 1, wherein the boosting state determination unit is configured to monitor a temperature change in an atmosphere of the fluid supply path to determine whether or not the normal boosting state is set. Pressure monitoring device.   The pressure increase state determination unit is configured to monitor a pressure change in the atmosphere of the fluid supply path to determine whether or not the normal pressure increase state is present. The secondary side pressure monitoring apparatus as described. In a pressure regulator in which a pressure regulator capable of adjusting the secondary pressure of the fluid supply path to a set pressure is provided in the middle of the fluid supply path, a secondary pressure determination method for monitoring the secondary pressure,
Whether the secondary pressure increases normally due to one or both of the change in the atmosphere of the fluid supply path and the temperature change of the fluid in the fluid supply path when the secondary pressure increases Secondary pressure discriminating method to discriminate.

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