JP2024018620A - Management system and management method - Google Patents

Abstract

To prophylactically reduce the occurrence of sticking in a control valve.SOLUTION: A management system includes: a sticking information storage part which stores passage time information related to passage time at which the risk of sticking of a control valve increases; a time measurement part which measures passage time from a period when the control valve is closed or opened; a sticking risk determination part which refers to the passage time information stored in the sticking information storage part and the passage time measured by the time measurement part to determine whether or not the risk of sticking of the control valve is high; and a determination result notification part which, upon the determination that the risk of sticking of the control valve is high, performs notification about results of the determination.SELECTED DRAWING: Figure 4

Description

The present invention relates to a management system and a management method.

Valves used in petrochemical plants and the like require particular attention to safety, and therefore regular maintenance is performed. In order to improve the efficiency of valve maintenance work, methods such as valve stick-slip detection (see Patent Document 1), valve hunting detection (see Patent Document 2), and valve scale adhesion detection (see Patent Document 3) have been proposed. There is.

Further, in the petrochemical plants described above, control valves such as ON-OFF valves that are controlled in two positions, fully open and fully closed, are sometimes used as valves. As such a control valve, a structure having a pocket portion between a valve body and a valve body rotating within the valve body, such as a ball valve, for example, is known. Regarding maintenance of such control valves, for example, a defect detection method (see Patent Document 4) that uses control valves as a diagnostic target has been proposed.

Patent No. 3254624 Patent No. 6200309 Patent No. 6216633 JP2020-34967A

A control valve having a pocket portion as described above is sometimes used in equipment that processes fluids that are solid or highly viscous at room temperature, such as polymer resins. In this case, fluid may remain in the pocket portion of the control valve and adhere to the valve body, resulting in malfunction. Therefore, in such equipment, it is required to preventively reduce the occurrence of sticking in the control valve.

The present invention has been made in view of the above, and an object of the present invention is to provide a management system and a management method that can preventively reduce the occurrence of sticking in a control valve.

The management system according to the present application includes a sticking information storage section that stores elapsed time information regarding the elapsed time at which the risk of control valve sticking increases, and a time measuring section that measures the elapsed time after the control valve is closed or opened. , a sticking risk determination unit that determines whether the control valve is in a state with a high risk of sticking by referring to the elapsed time information stored in the sticking information storage unit and the elapsed time measured by the time measuring unit; and a determination result notification unit that notifies the determination result when it is determined that the risk of valve sticking is high.

The above-mentioned management system has an opening/closing condition storage unit that stores opening/closing conditions that do not interfere with forced opening/closing of control valves, and a switching condition storage unit that stores opening/closing conditions that do not interfere with forced opening/closing of control valves, and a control system that stores opening/closing conditions that do not interfere with forced opening/closing of control valves. The control valve further includes an opening/closing operation execution unit that determines whether or not there is a problem, and automatically opens and closes the control valve when it is determined that there is no problem with opening/closing.

The above-mentioned management system uses pre-specified control systems when multiple control valves installed in the same piping system are determined to have a high risk of sticking at the same time, and when the opening/closing operation execution unit automatically opens/closes the multiple control valves. The control valve further includes an operation order instruction unit that automatically locks control valves other than one control valve so that they cannot be opened or closed in sequence.

The above management system has a sequence relationship storage unit that stores upstream and downstream order relationships in the piping system for multiple control valves installed in the same piping system, and a high risk of sticking simultaneously for multiple control valves in the piping system. When it is determined that the opening/closing operation execution unit automatically opens/closes multiple control valves, the downstream control valve is opened/closed before the upstream control valve by referring to the order relationship. The device further includes an operation order instruction section for automatically opening and closing operations.

The management method according to the present application includes a sticking information storage step of storing elapsed time information regarding the elapsed time at which the risk of control valve sticking increases, and an elapsed time measuring step of measuring the elapsed time after the control valve is closed or opened. a determination step of determining whether the control valve is in a state with a high risk of sticking by referring to the elapsed time information stored in the sticking information storage step and the elapsed time measured in the measurement time measuring step; If it is determined that the risk of sticking of the control valve is high, the method includes a notification step of notifying the determination result.

The above management method includes an opening/closing condition storage step that stores opening/closing conditions that do not pose a problem in forced opening/closing of control valves, and a storage step for storing opening/closing conditions that do not hinder the forced opening/closing of control valves. The control valve further includes an opening/closing operation execution step of determining whether or not there is any problem, and automatically opening/closing the control valve when it is determined that there is no problem with opening/closing.

The above management method is used when multiple control valves installed in the same piping system are determined to have a high risk of sticking at the same time, and the opening/closing operation execution unit automatically opens/closes the multiple control valves. The method further includes an operation order instruction step of automatically locking control valves other than one control valve so that they cannot be opened or closed.

The above management method includes a sequence relationship storage step for storing upstream and downstream order relationships in the piping system for a plurality of control valves provided in the same piping system, and a plurality of control valves in the piping system. When it is determined that the risk of sticking is high for control valves at the same time, and multiple control valves are automatically opened/closed by the opening/closing execution step, the downstream control valve is replaced with the upstream control valve by referring to the order relationship. It further includes an operation order instruction step of performing the automatic opening/closing operation so that the opening/closing operation is performed earlier than the automatic opening/closing operation.

According to the management system and management method described above, it is possible to determine whether the control valve is in a state with a high risk of sticking based on the elapsed time information stored in the sticking information storage section and the elapsed time measured by the time measuring section. If it is determined that the control valve is at high risk of sticking, the operator will be notified of the judgment result, and based on the notified judgment result, the operator can perform opening/closing operations to prevent the control valve from sticking. , can take appropriate action. This makes it possible to preventively reduce the occurrence of sticking in the control valve.

FIG. 1 is a diagram schematically showing an example of equipment equipped with a management system according to the first embodiment. FIG. 2 is a diagram showing an example of a control valve. FIG. 3 is a diagram showing an example of the open/closed state of the control valve. FIG. 4 is a functional block diagram showing an example of the management system according to the first embodiment. FIG. 5 is a flowchart illustrating an example of the operation flow of the management system according to the first embodiment. FIG. 6 is a diagram schematically showing an example of equipment equipped with a management system according to the second embodiment. FIG. 7 is a functional block diagram showing an example of a management system. FIG. 8 is a flowchart illustrating an example of the flow of operations of the management system according to the second embodiment. FIG. 9 is a diagram showing an example of the hardware configuration.

Next, embodiments will be described with reference to the drawings. In addition, in the following description, the same reference numerals are given to the same component in each embodiment, and repeated description is omitted.

[Principle 1]
The main cause of the sticking of ON-OFF control valves is that scale accumulated in the pocket portion of the valve body sticks when the open/closed state does not change for a certain period of time or more. For example, in a batch process such as a petrochemical plant, the valve body may not open or close for a certain period of time or more. This fixed time can vary from minutes to hours to days to months, for example.

The present inventor focused on the above points, analyzed in advance the elapsed time when the risk of sticking of the valve body becomes high in ON-OFF control valves, and determined the We have come up with the idea of determining whether or not there is a high risk of sticking, and notifying the operator that ON-OFF control valves that are determined to have a high risk of sticking should be opened and closed.

The operator may perform opening/closing operations for the purpose of preventing sticking within a range that does not cause any problem, taking into account the determined conditions of the ON-OFF control valve. Alternatively, even if it is not necessary to open and close the ON-OFF control valve, conditions may be defined in advance in which opening and closing will not cause any trouble, and the opening and closing operations may be performed automatically. Note that it is preferable to perform the opening/closing operation multiple times as long as there is no problem.

[First embodiment]
A first embodiment of the present application will be described. FIG. 1 is a diagram schematically showing an example of equipment including a management system 100 according to the first embodiment. As shown in FIG. 1, a management system 100 manages control valves 2 provided in equipment 1. The hardware configuration of the management system 100 will be described later. The equipment 1 is installed, for example, in a petrochemical plant, and processes fluids that become solid or highly viscous at room temperature, such as polymer resins. The equipment 1 includes a reaction processing furnace 3 containing a fluid. A piping 4 through which fluid flows is connected to the reaction processing furnace 3 . The equipment 1 may be configured to be heated by a steam trace (not shown) or the like.

The control valve 2 is provided, for example, in the piping 4 described above. The control valve 2 is an ON-OFF control valve that is controlled in two positions: fully open and fully closed. FIG. 2 is a diagram showing an example of the control valve 2. As shown in FIG. In this embodiment, the control valve 2 is a ball valve. The control valve 2 is one that is controlled in two positions, fully open and fully closed, such as a butterfly valve or a gate valve, and may be any other type of control valve as long as it has a pocket portion described later. Good too. One or more control valves 2 are provided. One or more control valves 2 can be managed using identification information such as a valve ID (A1, A2, A3, . . . , etc.) set for each control valve 2, for example.

As shown in FIG. 2, the control valve 2 has a structure in which a ball 202, which is the valve body, is sandwiched between a seat ring 203 called a ball seat. The control valve 2 is configured such that the ball 202 can be opened or closed by rotating the stem 204 through 90 degrees using the operating device 206. In order to prevent the fluid in the valve box 205 from leaking, a packing 207 is provided in the gap between the valve box 205 and the stem 204.

FIG. 3 is a diagram showing an example of the open/closed state of the control valve 2. As shown in FIG. As shown in FIG. 3, in the control valve 2, a dead space called a pocket portion 208 exists between the valve box 205 and the ball 202. The fluid flowing through the pipe 4 stays in the pocket portion 208 . When the fluid remaining in the pocket portion 208 becomes stuck between the ball 202 and the valve box 205, the opening/closing operation of the ball 202 is restricted, resulting in malfunction in which the valve does not open or close.

3(A) and 3(B) are diagrams showing an example of a state in which fluid is not stuck to the pocket portion 208 of the control valve 2. FIG. 3(A) shows the open state, and FIG. 3(B) shows the closed state. As shown in FIGS. 3(A) and 3(B), when the fluid is not stuck to the pocket portion 208, the open state is smoothly switched to the closed state.

3(C) and FIG. 3(D) are diagrams showing an example of a state in which fluid is stuck to the pocket portion 208 in the control valve 2. FIG. 3(C) shows the open state, and FIG. 3(D) shows the closed state. As shown in FIGS. 3(C) and 3(D), when the fluid is fixed to the pocket portion 208, the ball 202 and the valve body 205 are fixed by the fixed portion 209, so that the valve body 202 is in the open state. It becomes difficult to switch from the closed state to the closed state. In this embodiment, the occurrence of such sticking in the control valve 2 is preventively reduced.

FIG. 4 is a functional block diagram showing an example of the management system 100 according to the first embodiment. As shown in FIG. 4, the management system 100 includes a sticking information storage section 10, a time measurement section 20, a sticking risk determination section 30, a determination result notification section 40, an opening/closing condition storage section 50, and an opening/closing operation execution section. 60.

The fixed information storage unit 10 stores elapsed time information. The elapsed time information is information regarding the elapsed time at which the risk of the control valve 2 becoming stuck increases. Moreover, the elapsed time in this embodiment is the time that elapses after the control valve 2 is opened or closed. When a plurality of control valves 2 are provided, the sticking information storage unit 10 stores elapsed time information for each control valve 2.

The elapsed time information can be acquired based on, for example, data on malfunctions that occurred in the past in the equipment 1, data from experiments or simulations, or the like. The elapsed time at which the risk of the control valve 2 becoming stuck can be set to, for example, 10 hours.

The time measurement unit 20 measures the time that has elapsed since the control valve 2 was closed or opened. When a plurality of control valves 2 are provided, the time measurement section 20 measures the elapsed time for each control valve 2.

The sticking risk determining unit 30 refers to the elapsed time information stored in the sticking information storage unit 10 and the elapsed time measured by the time measuring unit 20, and determines whether the control valve 2 is in a state where there is a high risk of sticking. judge. When a plurality of control valves 2 are provided, the sticking risk determining section 30 can determine whether the sticking risk is high.

The determination result notification unit 40 notifies the determination result when it is determined that the risk of sticking of the control valve 2 is high.

The opening/closing condition storage unit 50 stores opening/closing conditions that are conditions that do not impede the forced opening/closing of the control valve 2. When a plurality of control valves 2 are provided, opening/closing conditions can be set and stored for each control valve 2. The opening/closing conditions can be obtained, for example, by interviewing experienced operators. The opening/closing condition may be a time-based condition, such as a time other than 13:00 to 15:00. Further, the opening/closing conditions may be values such as the temperature, pressure, flow rate, etc. of the fluid flowing through the control valve 2, or a stable state.

Also, for example, during a period in which batch processing is being performed in the reaction processing furnace 3 that requires fluid supply at a constant pace, the control valve 2 of the piping 4 that allows fluid to flow into the reaction processing furnace 3 is opened and closed. There is a problem with that. On the other hand, during a process change period in which fluid supply at a constant pace is not required, there is no problem in opening and closing the control valve 2 of the pipe 4 that causes fluid to flow into the reaction processing furnace 3. Therefore, the opening/closing conditions can be set to not be a batch processing period as described above, or to be a process change period. In addition, these conditions may be taken as an opening/closing condition such that fluid supply at a constant pace is not required in the reaction processing furnace 3.

The opening/closing operation execution unit 60 determines whether or not there is any problem in opening/closing the control valve 2 determined to have a high risk of sticking based on the opening/closing conditions, and if it is determined that there is no problem in opening/closing. The control valve 2 is automatically opened and closed.

Next, an example of the operation of the management system 100 configured as described above will be described. In the following, a case will be described in which the control valve 2 whose valve ID is A1 is managed. FIG. 5 is a flowchart illustrating an example of the operation flow of the management system 100 according to the first embodiment. As shown in FIG. 5, the sticking information storage unit 10 stores elapsed time information of the control valve 2 in advance (step S10). Here, the elapsed time information of the control valve 2 is assumed to be 10 hours, for example.

Further, the opening/closing condition storage unit 50 stores the opening/closing conditions of the control valve 2 in advance (step S20). Here, the opening/closing conditions for the control valve 2 are set to times other than, for example, from 13:00 to 15:00.

In a state where the above elapsed time information and opening/closing conditions are stored in advance, the time measuring section 20 measures the elapsed time after the control valve 2 is closed or opened (step S30). The time measuring section 20 outputs the measurement result to the sticking risk determining section 30.

The sticking risk determination unit 30 refers to the elapsed time information stored in the sticking information storage unit 10 and the elapsed time measured by the time measuring unit 20, and determines whether the control valve 2 is in a state where the risk of sticking is high. is determined (step S40). For example, if the elapsed time from the most recent opening/closing operation of the control valve 2 is less than 10 hours, the sticking risk determination unit 30 determines that the sticking risk of the control valve 2 is not high. On the other hand, if the time elapsed since the most recent opening/closing operation of the control valve 2 is 10 hours or more, the sticking risk determination unit 30 determines that the control valve 2 is at a high risk of sticking.

When it is determined that the risk of sticking of the control valve 2 is high (Yes in step S40), the determination result notification unit 40 notifies the determination result (step S50). The determination result notifying unit 40 can notify by displaying the determination result on a display unit 5 (see FIG. 1) provided in a control center of the equipment 1, for example. If it is determined that the risk of sticking of the control valve 2 is not high (No in step S40), the sticking risk determining section 30 repeatedly performs the determination in step S40 based on elapsed time, for example.

The opening/closing operation execution unit 60 determines whether or not there is no problem in opening/closing the control valve 2 that has been determined to have a high risk of sticking, based on the opening/closing conditions stored in the opening/closing condition storage unit 50 (step S60). For example, when it is determined that the control valve 2 has a high risk of sticking, the opening/closing operation execution unit 60 acquires the opening/closing conditions of the control valve 2 from the opening/closing condition storage unit 50. The opening/closing operation execution unit 60 determines whether or not the opening/closing condition for the control valve 2, "the time is other than 1:00 p.m. to 3:00 p.m.", is met. The opening/closing operation execution unit 60 determines that there is no problem in opening/closing the control valve 2 if the current time is outside the time from 13:00 to 15:00. On the other hand, when the current time is between 1:00 PM and 3:00 PM, the opening/closing operation execution unit 60 determines that there is a problem in opening/closing the control valve 2.

When the opening/closing operation execution unit 60 determines that there is no problem in opening/closing the control valve 2 (Yes in step S60), the opening/closing operation execution unit 60 automatically performs the opening/closing operation of the control valve 2 (step S70). When the control valve 2 is in the open state, the opening/closing operation execution unit 60 once brings the control valve 2 into the closed state, and then immediately returns it to the open state. Further, when the control valve 2 is in the closed state, the opening/closing operation execution unit 60 once brings the control valve 2 into the open state and then immediately returns it to the closed state.

On the other hand, if the opening/closing operation execution unit 60 determines that there is a problem in opening/closing the control valve 2 (No in step S60), the opening/closing operation execution unit 60 operates until the opening/closing conditions are met, that is, when the current time is other than from 13:00 to 15:00. The process waits until the opening/closing conditions are met (step S80), and performs the process of step S70.

As described above, the management system 100 according to the first embodiment includes the sticking information storage unit 10 that stores elapsed time information regarding the elapsed time when the risk of sticking of the control valve 2 increases, and the sticking information storage unit 10 that stores elapsed time information regarding the elapsed time when the risk of sticking of the control valve 2 becomes high. The control valve 2 is determined to have a high risk of sticking by referring to the elapsed time information stored in the sticking information storage section 10 and the elapsed time measured by the time measuring section 20. A sticking risk determining unit 30 that determines whether the control valve 2 is in a high sticking risk state, and a determination result notifying unit 40 that notifies the determination result when it is determined that the risk of sticking of the control valve 2 is high.

Furthermore, the management method according to the first embodiment includes a sticking information storage step (S10) for storing elapsed time information regarding the elapsed time when the risk of sticking of the control valve 2 becomes high; The control valve 2 refers to the elapsed time measuring step (S20) for measuring the elapsed time of It includes a determination step (S30) of determining whether the risk of sticking of the control valve 2 is high, and a notification step (S40) of notifying the determination result when it is determined that the risk of sticking of the control valve 2 is high.

According to this configuration, it is determined whether the control valve 2 is in a state where the risk of sticking is high based on the stored elapsed time information and the measured elapsed time, and whether the control valve 2 is in a state where the risk of sticking is high is determined based on the stored elapsed time information and the measured elapsed time. Since the determination result is notified when it is determined that the control valve 2 is present, the operator can take appropriate measures, such as opening/closing operations for the purpose of preventing the control valve 2 from sticking, based on the notified determination result. Thereby, the occurrence of sticking in the control valve 2 can be preventively reduced.

In addition, the management system 100 described above also includes an opening/closing condition storage unit 50 that stores opening/closing conditions that do not interfere with forced opening/closing of the control valve 2, and conditions for the control valve 2 determined to be in a state with a high risk of sticking. The control valve 2 further includes an opening/closing operation execution unit 60 that determines whether or not there is any problem in opening/closing based on the above, and automatically performs the opening/closing operation of the control valve 2 when it is determined that there is no problem in opening/closing.

In addition, the above management method includes an opening/closing condition storage step for storing opening/closing conditions that do not hinder forced opening/closing of the control valve 2, and a control valve 2 determined to have a high risk of sticking based on the conditions. The control valve 2 further includes an opening/closing operation execution step of determining whether or not there is any problem in opening/closing, and automatically opening/closing the control valve 2 if it is determined that there is no problem in opening/closing.

According to this configuration, for the control valve 2 determined to be in a state with a high risk of sticking, it is determined whether or not there is any problem in opening and closing based on the stored opening and closing conditions, and it is determined that there is no problem in opening and closing. Since the opening/closing operation of the control valve 2 is automatically performed when a problem occurs, the opening/closing operation of the control valve 2 determined to be in a state with a high risk of sticking can be performed at an appropriate timing while reducing the operator's workload. can.

[Principle 2]
If multiple ON-OFF control valves exist in the same piping system and multiple ON-OFF control valves are determined to have a "high risk of sticking" at the same time, opening and closing them at the same time is not a problem, even if there is no problem. Even if possible, it is preferable to avoid it. In other words, the opening/closing operation becomes a disturbance factor in the batch process, and it is necessary to avoid simultaneous occurrence of the influence of disturbance at a certain point as much as possible.

Therefore, we came up with the idea of automatically locking all but one ON-OFF control valve so that they cannot be opened or closed if multiple ON-OFF control valves in the same piping system are judged to have a high risk of sticking at the same time. did. This can improve safety.

[Principle 3]
When opening and closing an ON-OF control valve, disturbances in the same piping system tend to occur downstream after a certain period of time has passed since the opening and closing operation. Conversely, if the ON-OFF control valve on the upstream side is opened/closed first, there is a possibility that a plurality of disturbances will accumulate and be transmitted to the downstream side.

Therefore, if multiple ON-OFF control valves in the same piping system are determined to have a "high risk of sticking" at the same time, the downstream ON-OFF control valve will be automatically opened/closed first ( Alternatively, it is preferable to automatically lock the upstream side. This can reduce the probability that the effects of disturbances will occur simultaneously at a certain location.

[Second embodiment]
A second embodiment of the present application will be described. FIG. 6 is a diagram schematically showing an example of equipment including a management system 100A according to the second embodiment. As shown in FIG. 6, the management system 100A manages the control valves 2 provided in the equipment 1A. The equipment 1A, like the equipment 1 described in the first embodiment, handles processes for fluids that are solid or highly viscous at room temperature, such as polymer resins. The equipment 1A includes a reaction processing furnace 3 that accommodates a fluid. A piping system 6 through which fluid flows is connected to the reaction processing furnace 3 .

The piping system 6 includes a pipe 6A and pipes 6B and 6C. Pipes 6B and 6C each branch from piping 6A. The pipe 6B is arranged upstream of the pipe 6C in the fluid flow direction. In other words, the pipe 6C is arranged on the downstream side of the pipe 6B in the fluid flow direction.

The piping system 6 is provided with a plurality of control valves 2. The plurality of control valves 2 are managed using identification information such as a valve ID set for each control valve 2. In FIG. 6, for example, three control valves 2 are provided. In this embodiment, it is assumed that valve IDs A1, A2, and A3 are set for the three control valves 2 shown in FIG. 6, respectively. Hereinafter, when distinguishing between the three control valves 2, the control valve 2 with valve ID A1 will be referred to as control valve 2A, the control valve 2 with valve ID A2 will be referred to as control valve 2B, and the control valve 2 with valve ID A3 will be referred to as control valve 2B. The valve 2 will be referred to as a control valve 2C.

In the example shown in FIG. 6, the control valve 2A is arranged at the most upstream side of the three control valves 2 in the piping system 6. The control valve 2B is arranged in the piping system 6 on the downstream side of the control valve 2A and on the upstream side of the control valve 2C. The control valve 2C is arranged at the most downstream side of the three control valves 2 in the piping system 6.

Note that the configuration of the piping system 6 is not limited to the above configuration, and may be other configurations in which the number, arrangement, etc. of piping, branch piping, and control valves are different.

Note that the opening/closing conditions stored in the opening/closing condition storage unit 50 in this embodiment may be affected by the status of the piping system 6, even if the reaction processing furnace 3 is not directly related to the fluid passing through the control valve 2. It is also necessary to consider the scope. For example, as shown in FIG. 6, in parallel pipes 6A and 6C that branch on the downstream side of the control valve 2B, when opening and closing the control valve 2C provided in the pipe 6C, the reaction process during batch processing is If a furnace exists, this may correspond to "conditions that hinder opening and closing." That is, for pipes 6B, 6C, etc. that branch from the same pipe 6A, care must be taken in presetting "conditions that may hinder opening/closing."

FIG. 7 is a functional block diagram showing an example of a management system 100A according to the second embodiment. As shown in FIG. 7, the management system 100A includes a sticking information storage section 10, a time measurement section 20, a sticking risk determination section 30, a determination result notification section 40, an opening/closing condition storage section 50, and an opening/closing operation execution section. 60, an order relationship storage section 70, and an operation order instruction section 80. Note that the sticking information storage section 10, time measurement section 20, sticking risk determination section 30, determination result notification section 40, opening/closing condition storage section 50, and opening/closing operation execution section 60 are the same as those in the first embodiment. The configurations of the order relationship storage section 70 and the operation order instruction section 80, which are different from the first embodiment, will be described below.

The order relationship storage unit 70 stores upstream and downstream order relationships in the piping system 6 for a plurality of control valves 2 provided in the same piping system 6. In this embodiment, the control valves 2A, 2B, and 2C are arranged in order from the upstream side of the piping system 6. The order relationship storage unit 70 stores the order relationship among the control valves 2A, 2B, and 2C.

The operation order instruction unit 80 determines that a plurality of control valves 2 provided in the same piping system 6 have a high risk of sticking at the same time, and the opening/closing operation execution unit 60 automatically performs the opening/closing operation of the plurality of control valves 2. In addition, control valves 2 other than one control valve 2 are automatically locked so that they cannot be opened or closed in a predetermined order.

For example, when the operation order instruction unit 80 determines that the risk of sticking is high for multiple control valves 2 in the same piping system 6 at the same time, and the opening/closing operation execution unit 60 automatically performs the opening/closing operations of the multiple control valves 2. Then, with reference to the order relationship stored in the order relationship storage unit 70, the opening/closing operation execution unit 60 performs an opening/closing operation so that the downstream control valve 2 is opened/closed before the upstream control valve 2. can be set. Note that the operation order instruction unit 80 may cause the control valve 2 to be opened and closed in an order different from the order relationship stored in the order relationship storage unit 70.

Next, an example of the operation of the management system 100A configured as described above will be described. FIG. 8 is a flowchart illustrating an example of the operation flow of the management system 100A according to the second embodiment. As shown in FIG. 8, the sticking information storage unit 10 stores elapsed time information of the control valves 2A, 2B, and 2C in advance (step S110). Here, the elapsed time information for the control valve 2A is 10 hours, the elapsed time information for the control valve 2B is 12 hours, and the elapsed time information for the control valve 2C is 11 hours. In this way, even if the control valves 2A, 2B, and 2C are provided in the same piping system 6, their elapsed time information may differ from each other, for example, if the local temperatures differ in a configuration heated by steam tracing. be.

Moreover, the opening/closing condition storage unit 50 stores in advance the opening/closing conditions of the control valves 2A, 2B, and 2C (step S120). Here, the opening/closing conditions for the control valve 2A are set to a time other than, for example, from 13:00 to 15:00, the opening/closing conditions for the control valve 2B are set to a time other than, for example, from 14:00 to 15:00, and the opening/closing conditions for the control valve 2C are set, for example, from 1:00 to 15:00. The time shall be other than 2:00 p.m.

The order relationship storage unit 70 also stores upstream and downstream order relationships in the piping system 6 for the control valves 2A, 2B, and 2C provided in the same piping system 6 (step S130). The order relationship storage unit 70 stores an order relationship indicating that the control valves 2A, 2B, and 2C are arranged in this order from upstream.

In a state where the above elapsed time information and opening/closing conditions are stored in advance, the time measurement section 20 measures the elapsed time after the control valves 2A, 2B, and 2C are closed or opened (step S140). The time measurement unit 20 measures the elapsed time for each control valve 2 and outputs the measurement result to the sticking risk determination unit 30.

The sticking risk determining section 30 refers to the elapsed time information stored in the sticking information storage section 10 and the elapsed time measured by the time measuring section 20, and determines whether the control valves 2A, 2B, and 2C are in a state where the risk of sticking is high. It is determined whether there is one (step S150). Here, it is assumed that the control valves 2A, 2B, and 2C are simultaneously determined to have a high risk of sticking (Yes in step S150). Note that if it is determined that the risk of sticking of at least one control valve 2 is not high (No in step S150), the sticking risk determination unit 30 determines whether the sticking risk of at least one control valve 2 is high in step S150 based on the elapsed time, for example. Repeat the judgment.

When it is determined that the risk of sticking of the control valves 2A, 2B, and 2C is high, the determination result notification unit 40 notifies the determination result (step S160). The determination result notifying unit 40 can notify by displaying the determination result on a display unit 5 (see FIG. 1) provided in a control center of the equipment 1, for example.

The opening/closing operation execution unit 60 determines whether or not there is no problem in opening/closing the control valves 2A, 2B, and 2C that have been determined to have a high risk of sticking, based on the opening/closing conditions stored in the opening/closing condition storage unit 50. Determination is made (step S170). Here, it is assumed that the current time is outside of 13:00 and 15:00. In this case, the opening/closing operation execution unit 60 determines that there is no problem in opening/closing the control valves 2A, 2B, and 2C (Yes in step S170).

At this point, the control valves 2A, 2B, and 2C provided in the same piping system 6 are simultaneously determined to have a high risk of sticking, and the opening/closing operation execution unit 60 automatically opens/closes the plurality of control valves 2. This will apply in some cases. Therefore, in this case, the operation order instructing section 80 instructs the opening/closing operation execution section 60 about the order of opening/closing operations (step S180).

In step S180, the operation order instruction unit 80 automatically locks two control valves 2 other than one control valve 2 among the three control valves 2 so that opening/closing operations are not possible, for example in a predefined order. let

Further, in step S180, the operation order instruction unit 80 refers to the order relationship stored in the order relationship storage unit 70, and instructs the downstream control valve 2 to be opened/closed before the upstream control valve 2. Alternatively, the opening/closing operation execution section 60 may be caused to perform the opening/closing operation. Specifically, the operation order instruction unit 80 automatically locks the control valves 2A and 2B upstream of the control valve 2C until the opening/closing operation of the control valve 2C is completed. Further, the operation order instruction unit 80 automatically locks the control valve 2A upstream of the control valve 2B until the opening/closing operation of the control valve 2B is completed.

Regarding the end of the opening/closing operation in this case, the operation order instruction unit 80 not only ends the opening/closing operation of the control valve 2 itself, but also includes the elapsed time until the influence of the disturbance due to the opening/closing operation is sufficiently subsided. The opening/closing operation may be completed after the lapse of time.

When there is an instruction from the operation order instruction section 80, the opening/closing operation execution section 60 automatically performs the opening/closing operation of the control valve 2 based on the instruction from the operation order instruction section 80 (step S190). When the control valve 2 is in the open state, the opening/closing operation execution unit 60 once brings the control valve 2 into the closed state, and then immediately returns it to the open state. Further, when the control valve 2 is in the closed state, the opening/closing operation execution unit 60 once brings the control valve 2 into the open state and then immediately returns it to the closed state.

Note that when the opening/closing operation execution unit 60 determines in step S170 that there is a problem in opening and closing at least one control valve 2 (No in step S170), it waits until there is no problem in opening and closing (step S200). The opening/closing operation execution unit 60 performs the processing from step S180 when there is no problem with opening/closing.

As described above, in the management system 100A according to the second embodiment, when a plurality of control valves 2 provided in the same piping system are simultaneously determined to have a high risk of sticking, the opening/closing operation execution unit 60 automatically The present invention further includes an operation order instruction section 80 that automatically locks control valves 2 other than one control valve 2 so that they cannot be opened or closed in a predetermined order when two opening/closing operations are performed.

In addition, the management method according to the second embodiment is applicable when it is determined that a plurality of control valves 2 provided in the same piping system 6 have a high risk of sticking at the same time, and the opening and closing operations of the plurality of control valves 2 are automatically performed. , further includes an operation order instruction step (S180) for automatically locking control valves 2 other than one control valve 2 so that they cannot be opened or closed in a predefined order.

According to this configuration, if multiple control valves 2 in the same piping system are determined to have a high risk of sticking at the same time, all but one control valve 2 are automatically locked so that they cannot be opened or closed, thereby improving safety. can be improved.

The management system 100A also includes an order relationship storage unit 70 that stores upstream and downstream order relationships in the piping system 6 for a plurality of control valves 2 provided in the same piping system 6; When it is determined that the risk of sticking is high for the control valves 2 at the same time, and the opening/closing operation execution unit 60 automatically opens/closes the plurality of control valves 2, the control valves 2 on the downstream side are It further includes an operation order instruction section 80 that automatically performs an opening/closing operation so that the opening/closing operation is performed before the upstream control valve 2.

The above management method also includes a sequence relationship storage step (S130) for storing upstream and downstream sequence relationships in the piping system 6 for a plurality of control valves 2 provided in the same piping system 6; When it is determined that the risk of sticking is high for multiple control valves 2 at the same time, and when the opening/closing operation of multiple control valves 2 is automatically performed in the opening/closing execution step, referring to the order relationship, the control valves 2 on the downstream side are The control valve further includes an operation order instruction step (S180) for performing an automatic opening/closing operation so that the opening/closing operation is performed before the control valve 2 on the side.

According to this configuration, when it is determined that the risk of sticking is high for multiple control valves 2 in the same piping system 6 at the same time, automatic opening/closing operations can be performed so that the downstream control valves 2 are opened/closed first. can. This can reduce the probability that the effects of disturbances will occur simultaneously at a certain location.

[Hardware configuration]
FIG. 9 is a diagram showing an example of the hardware configuration of the management system. Since the management systems 100 and 100A have similar hardware configurations, they will be described here as an information processing device 300. As shown in FIG. 9, the information processing device 300 includes a communication device 300a, an HDD (Hard Disk Drive) 300b, a memory 300c, and a processor 300d. Furthermore, the parts shown in FIG. 9 are interconnected by a bus or the like.

The communication device 300a is a network interface card or the like, and communicates with other devices. The HDD 300b stores programs and DB that operate the functions of each section described above.

The processor 300d reads a program that executes the same processing as each processing unit described above from the HDD 300b or the like and expands it into the memory 300c, thereby operating a process that executes each of the functions described above. For example, taking the management system 100 as an example, this process executes the same functions as each processing unit included in the management system 100. Specifically, the processor 300d reads a program having the same functions as the time measurement unit 20, the sticking risk determination unit 30, the determination result notification unit 40, the opening/closing operation execution unit 60, etc. from the HDD 300b and the like. The processor 300d then executes a process similar to that of the time measurement section 20, the sticking risk determination section 30, the determination result notification section 40, and the opening/closing operation execution section 60. Furthermore, the HDD 300b is provided with a storage area corresponding to the fixed information storage section 10 and the opening/closing condition storage section 50. When executing the above program, the processor 300d accesses the storage areas corresponding to the fixed information storage section 10 and the opening/closing condition storage section 50 of the HDD 300b as necessary, and reads data etc. stored in the storage areas. .

In this way, the information processing device 300 operates as an information processing device that executes various information processing methods by reading and executing programs. Further, the information processing device 300 can also realize the same functions as in the embodiments described above by reading the program from a recording medium using a medium reading device and executing the read program. Note that the programs referred to in other embodiments are not limited to being executed by the information processing device 300. For example, the above embodiments may be applied in the same way when another computer or server executes the program, or when these computers or servers cooperate to execute the program.

This program may be distributed via a network such as the Internet. Additionally, this program is recorded on a computer-readable recording medium such as a hard disk, flexible disk (FD), CD-ROM, MO (Magneto-Optical disk), or DVD (Digital Versatile Disc), and is read from the recording medium by the computer. It may also be executed by being read.

Among the processes described in the first and second embodiments, all or part of the processes described as being performed automatically can be performed manually, or may be performed manually. All or part of the processes described above can also be performed automatically using known methods. In addition, information including the processing procedures, specific names, and various data and parameters shown in the above documents and drawings may be changed arbitrarily, unless otherwise specified. For example, the various information shown in each figure is not limited to the illustrated information.

Furthermore, each component of each device shown in the drawings is functionally conceptual, and does not necessarily need to be physically configured as shown in the drawings. In other words, the specific form of distributing and integrating each device is not limited to what is shown in the diagram, and all or part of the devices can be functionally or physically distributed or integrated in arbitrary units depending on various loads and usage conditions. Can be integrated and configured.

Furthermore, the above-described embodiments and modifications can be combined as appropriate within a range that does not conflict with the processing contents.

Further, the above-mentioned "section, module, unit" can be read as "means", "circuit", etc. For example, the changing section can be read as changing means or changing circuit.

Some of the embodiments of the present application have been described above in detail based on the drawings, but these are merely examples, and various modifications and variations may be made based on the knowledge of those skilled in the art, including the embodiments described in the disclosure section of the invention. It is possible to carry out the invention in other forms with modifications.

1, 1A Equipment 2, 2A, 2B, 2C Control valve 3 Reaction processing furnace 4, 6A, 6B, 6C Piping 5 Display section 6 Piping system 10 Sticking information storage section 20 Time measurement section 30 Sticking risk judgment section 40 Notification section 50 Opening/closing Condition storage section 60 Opening/closing operation execution section 70 Order relationship storage section 80 Operation order instruction section 100, 100A Management system 202 Ball 203 Seat ring 204 Stem 205 Valve box 206 Operating device 207 Packing 208 Pocket section

Claims (8)

a sticking information storage unit that stores elapsed time information regarding the elapsed time at which the risk of sticking of the control valve increases;
a time measuring unit that measures the elapsed time after the control valve is closed or opened;
a sticking risk determination that determines whether the control valve is in a state with a high risk of sticking by referring to the elapsed time information stored in the sticking information storage section and the elapsed time measured by the time measuring section; Department and
A management system comprising: a determination result notification unit that notifies the determination result when it is determined that the risk of sticking of the control valve is in a high state. an opening/closing condition storage unit that stores opening/closing conditions that do not interfere with forced opening/closing of the control valve;
Regarding the control valve that has been determined to have a high risk of sticking, it is determined whether there is any problem in opening or closing based on the opening/closing conditions, and if it is determined that there is no problem in opening or closing, the control valve is The management system according to claim 1, further comprising: an opening/closing operation execution unit that automatically performs opening/closing operations. In a case where it is determined that the risk of sticking is high for a plurality of control valves provided in the same piping system and the opening/closing operation of the plurality of control valves is automatically performed by the opening/closing operation execution unit, The management system according to claim 2, further comprising: an operation order instruction unit that automatically locks the control valves other than one of the control valves so that they cannot be opened or closed. an order relationship storage unit that stores upstream and downstream order relationships in the piping system for the plurality of control valves provided in the same piping system;
When a plurality of the control valves in the piping system are determined to have a high risk of sticking at the same time, and the opening/closing operation execution unit automatically performs the opening/closing operation of the plurality of control valves, referring to the order relationship, the downstream The management system according to claim 2 or 3, further comprising: an operation order instruction unit that automatically opens and closes the control valve on the side so as to open and close the control valve on the upstream side before the control valve on the upstream side. a sticking information storing step of storing elapsed time information regarding an elapsed time at which the risk of sticking of the control valve increases;
an elapsed time measuring step of measuring elapsed time after the control valve is closed or opened;
Referring to the elapsed time information stored in the sticking information storage step and the elapsed time measured in the measurement time measuring step, it is determined whether the control valve is in a state with a high risk of sticking. a determination step;
A management method comprising: when it is determined that the risk of sticking of the control valve is in a high state, a notification step of notifying the determination result. an opening/closing condition storage step for storing opening/closing conditions that do not interfere with forced opening/closing of the control valve;
Regarding the control valve that has been determined to have a high risk of sticking, it is determined whether there is any problem in opening or closing based on the opening/closing conditions, and if it is determined that there is no problem in opening or closing, the control valve is The management method according to claim 5, further comprising: an opening/closing operation execution step of automatically performing the opening/closing operation. In a case where it is determined that the risk of sticking is high for a plurality of control valves provided in the same piping system and the opening/closing operation of the plurality of control valves is automatically performed by the opening/closing operation execution unit, The management method according to claim 6, further comprising an operation order instruction step of automatically locking the control valves other than one of the control valves so that they cannot be opened or closed. an order relationship storage step of storing upstream and downstream order relationships in the piping system for the plurality of control valves provided in the same piping system;
When it is determined that a plurality of the control valves in the piping system have a high risk of sticking at the same time, and the opening/closing operation of the plurality of control valves is automatically performed in the opening/closing execution step, referring to the order relationship, the downstream side 8. The management method according to claim 6, further comprising: an operation order instruction step of automatically performing an opening/closing operation so that the control valve is opened/closed earlier than the upstream control valve.

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