JP2020034967A - Valve maintenance support device and support method - Google Patents

Abstract

To improve the work efficiency of ON-OFF valve maintenance.SOLUTION: A valve maintenance support device includes: a valve ID storage unit 1 that stores an ID of an ON-OFF valve that can be a candidate for maintenance; an opening storage unit 3 that stores the valve ID together with an opening measurement value data transmitted from an opening meter provided in the ON-OFF valve; a diagnostic index calculating unit 4 that calculates a time required for opening/closing as a diagnostic index on the basis of the opening measurement value data for the ON-OFF valve whose ID is stored in the valve ID storage unit 1; a diagnostic index presentation unit 5 that presents the numerical value of the diagnostic index; a determination unit 6 in which the time required for opening/closing calculated as the diagnostic index is compared with a threshold value; a determination result presentation unit 7 that presents a determination result of the determination unit 6, and for the ON-OFF valve of which a value of the time required for opening/closing is determined to be equal to or greater than the corresponding threshold value, that presents the ID of this valve and the value equal to or greater than the threshold value are presented in a different format.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for supporting maintenance work, and more particularly to a valve maintenance support apparatus and a support method for realizing support for efficient work of maintenance of an ON-OFF valve.

  Valves used in petrochemical plants and the like (for example, the control valve in FIG. 15) require special attention to safety, and are therefore regularly maintained. The control valve shown in FIG. 15 includes a valve body 100 that opens and closes a passage through which a fluid flows, a positioner 101 that converts an input electric signal into air pressure, and an operating device that operates the valve body 100 in accordance with the air pressure supplied from the positioner 101. 102.

  In a plant in which a large number of valves are installed as shown in FIG. 15, in order to improve the maintenance work efficiency of the valves, a technique for detecting the occurrence of stick-slip in a sliding portion of the valves (see Patent Document 1). A technique for determining a hunting state (see Patent Document 2), a technique for detecting adhesion of scale to a valve (see Patent Document 3), and the like have been proposed.

  On the other hand, there is an ON-OFF valve that can take only two positions of full opening / full closing, such as a ball valve, as another type of valve other than a control valve that can continuously change the opening. And butterfly valves and gate valves. The ON-OFF valve shown in FIG. 16 uses a ball valve, and has a structure in which a ball 200 serving as a valve element is sandwiched between seat rings 201 called a ball seat. By turning it one degree, the valve can be opened and closed. Further, depending on the type, there is a type other than 90 degrees.

  Most of the ON-OFF valves use electromagnetic valves, and answerbacks using limit switches represent only two states, a closed state and an open state. In this case, the operation process of opening and closing the valve is not reflected on the answer back. That is, the answer-back function of the ON-OFF valve only issues an alarm when an abnormality occurs. If an emergency is already in an abnormal state when the alarm is generated, the treatment is too late.

  There is no upper limit for safety or work efficiency that can be considered complete or sufficient, and further improvements in safety and work efficiency are required. Particularly, in a petrochemical plant or the like, a plurality of valves 10-A, 10-C, and 10-M are used, for example, as shown in FIG. Therefore, further improvement is required for the efficiency of valve maintenance.

Japanese Patent No. 3254624 Japanese Patent No. 6200309 Japanese Patent No. 6216633

  The present invention has been made to solve the above problems, and has as its object to provide a valve maintenance support device and a support method capable of improving the work efficiency of maintenance of an ON-OFF valve.

The valve maintenance support device of the present invention is transmitted from a valve ID storage unit configured to previously store an ID of an ON-OFF valve that can be a maintenance candidate and an opening meter provided in the ON-OFF valve. The opening degree storage unit configured to store the opening degree measurement value data together with the ID of the ON-OFF valve, and the opening degree measurement value for the ON-OFF valve whose ID is stored in the valve ID storage unit. A diagnostic index calculating unit configured to calculate the opening and closing required time as a diagnostic index based on the data, and a diagnostic index presenting unit configured to present a numerical value of the diagnostic index calculated by the diagnostic index calculating unit. It is characterized by having.
Further, one configuration example of the valve maintenance support device of the present invention includes a determination unit configured to compare the opening / closing required time calculated as the diagnostic index with a corresponding threshold value that is defined in advance, and a determination unit configured to perform the determination. A determination result presenting unit configured to present a result, wherein the determination result presenting unit determines an ID of the ON-OFF valve for which the numerical value of the opening / closing required time is determined to be equal to or more than a corresponding threshold value. And a numerical value equal to or larger than the threshold value is presented in a format different from the usual format.
Further, in one configuration example of the valve maintenance support device of the present invention, the opening / closing required time is a required time of opening 0% → 100% during opening operation and a required time of opening 100% → 0% during closing operation. At least one of

In addition, the valve maintenance support device of the present invention transmits a valve ID storage unit configured to previously store the ID of an ON-OFF valve that can be a maintenance candidate, and transmits the information from an opening meter provided in the ON-OFF valve. The opening degree storage unit configured to store the measured opening degree measurement value data together with the ID of the ON-OFF valve, and the opening degree of the ON-OFF valve whose ID is stored in the valve ID storage unit. A diagnostic index calculating unit configured to calculate the maximum operating speed and the minimum operating speed as a diagnostic index based on the measured value data, and a configuration of presenting a numerical value of the diagnostic index calculated by the diagnostic index calculating unit. And a diagnostic index presenting unit.
Further, one configuration example of the valve maintenance support device of the present invention includes a determination unit configured to compare the maximum operation speed and the minimum operation speed calculated as the diagnostic index with corresponding predetermined thresholds, respectively. A determination result presentation unit configured to present a determination result of the determination unit, wherein the determination result presentation unit is equal to or greater than a threshold value corresponding to at least one of the numerical values of the maximum operation speed and the minimum operation speed. With respect to the ON-OFF valve determined as above, the ID of the valve and a numerical value equal to or larger than the threshold value are presented in a format different from usual.
In one configuration example of the valve maintenance support device of the present invention, the maximum operation speed and the minimum operation speed are at least one of an opening operation time and a closing operation time.
In one configuration example of the valve maintenance support device of the present invention, the diagnostic index presenting unit presents information indicating that an ON-OFF valve is to be diagnosed, together with a numerical value of the diagnostic index. Things.

  Further, the valve maintenance support method of the present invention includes a first step of storing the opening measurement value data transmitted from the opening meter provided in the ON-OFF valve together with the ID of the ON-OFF valve; A second step of calculating an opening / closing required time as a diagnostic index based on the opening degree measurement value data for an ON-OFF valve which is a candidate for maintenance and whose ID is stored in the ID storage unit; and And a third step of presenting the numerical value of the diagnostic index calculated in the step (a).

  Further, the valve maintenance support method of the present invention includes a first step of storing the opening measurement value data transmitted from the opening meter provided in the ON-OFF valve together with the ID of the ON-OFF valve; A second step of calculating a maximum operating speed and a minimum operating speed as diagnostic indices for ON-OFF valves which are candidates for maintenance and whose ID is stored in the ID storage unit, based on the opening degree measurement value data; And a third step of presenting the numerical value of the diagnostic index calculated in the second step.

  According to the present invention, the ON / OFF valve whose ID is stored in the valve ID storage unit calculates the opening / closing required time as a diagnostic index based on the opening measurement value data, and presents the numerical value of the diagnostic index. The change in the operation of the ON-OFF valve before the opening / closing required time reaches the upper limit can be grasped, and the operator can assist the operation of selecting the maintenance-candidate ON-OFF valve. As a result, in the present invention, the work efficiency of maintenance of the ON-OFF valve can be improved.

  Further, in the present invention, the maximum operating speed and the minimum operating speed are calculated as diagnostic indices for ON-OFF valves whose IDs are stored in the valve ID storage unit based on the opening degree measurement value data, and the numerical values of the diagnostic indices are calculated. , The change in the operation of the ON-OFF valve before the operation speed reaches the upper limit can be grasped, and the operator can support the operation of selecting the ON-OFF valve as a maintenance candidate. As a result, in the present invention, the work efficiency of maintenance of the ON-OFF valve can be improved.

FIG. 1 is a block diagram showing the configuration of the valve maintenance support device according to the first embodiment of the present invention. FIG. 2 is a flowchart illustrating the operation of the valve maintenance support device according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating an example of the structure of the ON-OFF valve according to the first embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of an ON-OFF valve opening meter according to the first embodiment of the present invention. FIG. 5 is a diagram illustrating an example of the opening operation of the ON-OFF valve. FIG. 6 is a diagram illustrating an example of a closing operation of the ON-OFF valve. FIG. 7 is a diagram illustrating an example of the presentation of a diagnostic index by the diagnostic index presenting unit and the determination result presenting unit of the valve maintenance support device according to the first embodiment of the present invention. FIG. 8 is a diagram showing a configuration of a plant and a device management system thereof according to a second embodiment of the present invention. FIG. 9 is a block diagram showing the configuration of the valve maintenance support device according to the third embodiment of the present invention. FIG. 10 is a flowchart illustrating the operation of the valve maintenance support device according to the third embodiment of the present invention. FIG. 11 is a diagram illustrating an example of the maximum operation speed and the minimum operation speed of the ON-OFF valve in a normal state. FIG. 12 is a diagram illustrating an example in which the maximum operation speed and the minimum operation speed of the ON-OFF valve decrease. FIG. 13 is a diagram illustrating an example in which the maximum operation speed and the minimum operation speed of the ON-OFF valve increase. FIG. 14 is a block diagram illustrating a configuration example of a computer that realizes the valve maintenance support device according to the first to third embodiments of the present invention. FIG. 15 is a diagram illustrating an example of the control valve. FIG. 16 is a diagram illustrating an example of the ON-OFF valve. FIG. 17 is a diagram illustrating an example of a plurality of valves used in a tank of a plant.

[Principle of the invention]
Most of the ON-OFF valves have a simple structure utilizing an electromagnetic valve. The inventor has focused on the point that a sign of a malfunction of the ON-OFF valve also appears in an easy-to-understand phenomenon by such a simple structure. It was also found that the scale of the ON-OFF valve mainly adheres to the sliding part (a substance having a high viscosity or a large particle enters the sliding part), thereby lowering the operating speed of the ON-OFF valve. . In addition, the seal parts (gland packing and gasket) of the ON-OFF valve are worn and lose their original frictional force, so that the ON-OFF valve operates at a higher speed than usual (for example, the inner valve is not used). The occurrence of jumping when the valve is opened due to the bite) was identified.

  Then, the inventor installs a sensor capable of detecting the valve opening / closing operation (stroke) on the ON-OFF valve, and detects and presents the behavior from a change in the inclination (or the maximum operating speed and the minimum operating speed) of the opening / closing operation. Thus, the inventor has come to think that it is possible to estimate a malfunction of the ON-OFF valve. Thereby, in the present invention, the work efficiency of maintenance of the ON-OFF valve can be improved.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the valve maintenance support device according to the first embodiment of the present invention. This embodiment is an example in which the behavior of the ON-OFF valve is detected from the inclination of the opening / closing operation. In the following embodiments, for the sake of simplicity, the case of the valve ID and the like are assumed to be simpler than those used in an actual plant.

  The valve maintenance support device includes a valve ID storage unit 1 that previously stores IDs (identification information) of a plurality of ON-OFF valves that may be candidates for maintenance, and an opening ID transmitted from an opening meter provided in the ON-OFF valve. A receiving unit 2 for receiving the measured degree data, an opening storage unit 3 for storing the measured degree data transmitted from the degree meter provided in the ON-OFF valve together with the ID of the ON-OFF valve, The diagnostic index calculating unit 4 calculates the opening and closing required time as a diagnostic index based on the opening degree measurement value data for the ON-OFF valve whose ID is stored in the valve ID storage unit 1, and the diagnostic index calculating unit 4 calculates A diagnostic index presenting unit 5 for presenting the numerical value of the diagnostic index, a determining unit 6 for comparing the required opening and closing time calculated as the diagnostic index with a corresponding threshold value defined in advance, The determination result of presenting the determination result of the part 6 and presenting the ID of the valve and the numerical value of the threshold value or more in a format different from the normal for the ON-OFF valve for which the numerical value of the opening / closing required time is determined to be equal to or more than the corresponding threshold value And a presentation unit 7.

  FIG. 2 is a flowchart illustrating the operation of the valve maintenance support device of the present embodiment. In the present embodiment, for example, assuming that there are 26 valves in the plant, "A", "B", "C",..., "M",. , "Y", and "Z" are assigned in advance. In particular, the valves with the valve IDs “A”, “C”, and “M” are ON-OFF valves using solenoid valves, and the IDs “A”, “C”, and “M” are stored in the valve ID storage unit 1. Is stored in advance.

  Each of the ON-OFF valves of the valve IDs “A”, “C”, and “M” is provided with an opening meter, so that the valve opening can be continuously measured. FIG. 3 is a diagram showing an example of the structure of the ON-OFF valve of the present embodiment, in which an opening meter 204 is added to the ON-OFF valve shown in FIG. The additional position of the opening meter 204 is not limited to the position shown in FIG. 16, but may be any position at which the opening can be measured.

  FIG. 4 is a block diagram illustrating a configuration of the opening meter 204. The opening meter 204 includes an opening measuring unit 210 that continuously measures a valve opening by continuously detecting a rotation angle of a stem (valve rod) 202 of an ON-OFF valve, and an opening meter 204. A valve ID storage unit 211 that stores a valve ID unique to the attached ON-OFF valve, and a transmission unit 212 that periodically transmits the opening measurement value data and the valve ID to the valve maintenance support device are provided. ing.

  The transmission unit 212 adds the valve ID stored in the valve ID storage unit 211 to the opening degree measurement value data and transmits the data. In addition, since it is necessary to continuously acquire the opening degree of the ON-OFF valve, the measurement / transmission cycle of the opening measurement value data may be shorter than the minimum value required for the ON / OFF valve opening / closing time. is necessary.

  When receiving the opening measurement value data from each ON-OFF valve (YES in step S100 in FIG. 2), the receiving unit 2 of the valve maintenance support device adds the received opening measurement value data and the opening measurement value data. The received valve ID and the reception time of the opening measurement value data are stored in the opening storage unit 3 (step S101 in FIG. 2).

  Subsequently, the diagnostic index calculation unit 4 of the valve maintenance support device stores the valve ID in the valve ID storage unit 1 and stores in the opening degree storage unit 3 for each ON-OFF valve that is a candidate for maintenance. The opening / closing required time is calculated as a diagnostic index based on the measured opening degree data (step S102 in FIG. 2).

  In the present embodiment, as the ON / OFF valve opening / closing required time, a required time TOP from an opening 0% to 100% and a required time TCL from an opening 100% to 100% are calculated. As described above, since the opening measurement value data, the valve ID, and the reception time of the opening measurement value data obtained in time series are stored in the opening storage unit 3, the opening / closing required time is set to ON-OFF. It is possible to calculate for each valve and each operating direction.

  The diagnostic index presenting unit 5 of the valve maintenance support device presents the numerical value of the diagnostic index of each ON-OFF valve calculated by the diagnostic index calculating unit 4 to the operator (Step S103 in FIG. 2). At this time, the diagnostic index presenting unit 5 presents information indicating that the ON-OFF valve that can be a maintenance candidate is to be diagnosed, together with the numerical value of the diagnostic index.

  In the present embodiment, such a presentation quantitatively indicates the necessity of paying attention to the ON-OFF valve to an operator who has little knowledge of the necessity of the maintenance of the ON-OFF valve. It is possible to reduce the risk of the ON-OFF valve failing to check.

  On the other hand, the determination unit 6 of the valve maintenance support device determines, for each valve, whether or not the diagnostic index of each ON-OFF valve whose valve ID is registered in the valve ID storage unit 1 is equal to or greater than a predetermined threshold TH. (Step S104 in FIG. 2). In the present embodiment, both the required time TOP of the opening 0% → 100% and the required time TCL of the opening 100% → 0% are calculated as the diagnostic indicators of the ON-OFF valve. The determination unit 6 may compare each of these required times TOP and TCL with the threshold value TH.

The determination result presentation unit 7 of the valve maintenance support device presents the determination result of the determination unit 6 to the operator (Step S105 in FIG. 2). Specifically, for an ON-OFF valve for which at least one of the required opening / closing times TOP and TCL is determined to be equal to or greater than the corresponding threshold, the determination result presentation unit 7 sets the ID of the valve and a numerical value equal to or greater than the threshold as normal. It may be displayed in a different format (for example, displayed in red).
In this way, the processing of steps S100 to S105 in FIG. 2 is performed periodically or when there is an instruction to execute diagnosis from the operator.

FIG. 5 is a diagram illustrating an example of the opening operation of the ON-OFF valve, and FIG. 6 is a diagram illustrating an example of the closing operation of the ON-OFF valve.
FIG. 5 shows that the ON-OFF valve performing the opening operation as indicated by OP1 in the normal state changes its characteristic in the order of OP1 → OP2 → OP3, and the required time TOP of the opening degree 0% → 100% decreases. Here is an example that has become progressively slower. TOPmax in FIG. 5 is an open-side timer upper limit indicating the maximum allowable value of the required time TOP for the opening degree of the ON-OFF valve from 0% to 100%.

On the other hand, FIG. 6 shows that the ON-OFF valve, which normally performs the closing operation as indicated by CL1 in the normal state, changes its characteristic in the order of CL1 → CL2 → CL3, and the time required for opening 100% → 0%. An example in which the TCL gradually becomes slower is shown. TCLmax in FIG. 6 is a closed timer upper limit indicating the maximum allowable value of the required time TCL for the ON-OFF valve opening degree from 100% to 0%.

  Note that the threshold value TH is preferably smaller than the open / close timer upper limits TOPmax and TCLmax in order to capture the operation change (sign) of the ON-OFF valve before the required open / close time reaches the open / close timer upper limits TOPmax and TCLmax.

  FIG. 7 is a diagram illustrating an example of the presentation of a diagnostic index by the diagnostic index presenting unit 5 and the determination result presenting unit 7. In the example of FIG. 7, the diagnostic indices of the valves with the valve IDs “A”, “C”, and “M” are displayed in an area 500 of the screen 50 displayed by the diagnostic index presenting unit 5. The diagnostic index presenting unit 5 displays information indicating that the ON-OFF valve is to be diagnosed in the area 501 of the screen 50. Further, the diagnostic index presenting unit 5 displays, on the screen 50, a pipe instrumentation diagram 502 of a location where the ON-OFF valve to be diagnosed is provided as shown in FIG. It may be displayed.

  In this embodiment, the threshold value TH is set to 1.5 seconds (a value of 1/2 of the above-mentioned TOPmax and TCLmax). In the example of FIG. 7, among the diagnostic indices of the ON-OFF valve with the valve ID “M”, the required time of opening 0% → 100% is 1.8 seconds, and the required time of opening 100% → 0%. 1.7 seconds. For this reason, the determination result presentation unit 7 displays the numerical value of the required opening / closing time and the valve ID in a color (white on a black background in the example of FIG. 7) different from the required opening / closing time of the other ON-OFF valves. .

  In this manner, in this embodiment, the operation change (sign) of the ON-OFF valve before the opening / closing required time reaches the opening / closing timer upper limit TOPmax, TCLmax can be captured, and the operator selects the ON-OFF valve as a maintenance candidate. Can help.

  In this embodiment, both the required time TOP from the opening 0% to 100% during the opening operation and the required time TCL from the opening 100% to 0% during the closing operation are calculated as the diagnostic indices. However, only one of them may be calculated and compared with the threshold value TH.

  In the present embodiment, the threshold value TH during the opening operation and the threshold value during the closing operation are set to the same value. However, since the operating speed of the ON-OFF valve is generally different between the opening operation and the closing operation, the opening timer upper limit TOPmax is set. And the upper limit of the closed timer TCLmax may also be different values. Therefore, when calculating the opening / closing required times TOP and TCL for both the opening operation and the closing operation as in the present embodiment, the threshold values TH corresponding to each of the opening operation and the closing operation are individually set. You may put it.

[Second embodiment]
Next, a second embodiment of the present invention will be described. This embodiment describes an implementation example of the first embodiment. FIG. 8 is a diagram showing the configuration of a plant and its device management system. In the present embodiment, ON-OFF valves 10-A and 10-M having valve IDs "A" and "M" are disposed in the flow path 11-1, and ON-OFF valves 10-C having valve IDs "C" are provided. Is provided in the flow path 11-3. In FIG. 8, 12-A, 12-C and 12-M are flow rate measuring devices, 13 is a tank, and 14 is a pressure transmitter. In FIG. 8, the description of valves other than the valve IDs “A”, “C”, and “M” is omitted.

  The device management system for petroleum and chemical plants is provided with a management device 15 for controlling and managing each device of the plant. The valve ID storage unit 1, the reception unit 2, the opening degree storage unit 3, and the diagnostic index calculation unit 4 described in the first embodiment deal with enormous information peculiar to a plant, and therefore, must be implemented in the management device 15. Is preferred.

  On the other hand, the diagnostic index presenting unit 5, the determining unit 6, and the determining result presenting unit 7 basically provide processing that is necessary only when the necessity of valve maintenance is determined. In general, a maintenance executor (a worker in charge of a maintenance contract company) is entrusted by a plant owner company to perform maintenance of the plant. Therefore, assuming that an unspecified number of plants are targeted, the diagnostic index presenting unit 5, the judging unit 6, and the judging result presenting unit are provided on a portable computer 16 carried by a worker (operator) of the maintenance contract company. 7 is preferably implemented.

The plant management device 15 and the computer 16 are temporarily connected using a communication function such as Ethernet (registered trademark) at the time of maintenance work.
When the operator starts application software on the computer 16, the CPU of the computer 16 executes processing according to a program stored in the memory, and functions as the diagnostic index presenting unit 5, the determining unit 6, and the determination result presenting unit 7. Realize.

  The diagnostic index presentation unit 5 reads the valve ID from the valve ID storage unit 1 on the management device 15, reads the diagnostic index of each ON-OFF valve calculated by the diagnostic index calculation unit 4, and displays it on the display of the computer 16. (Step S103 in FIG. 2). Further, the determination result presentation unit 7 displays the determination result of the determination unit 6 on the display of the computer 16 (Step S105 in FIG. 2).

The operator confirms an ON-OFF valve to be particularly noted based on the displayed valve ID, the diagnostic index, and the determination result. After confirming the displayed items, the operator disconnects the computer 16 from the management device 15.
Thus, the valve maintenance support device described in the first embodiment can be applied to an actual plant.

[Third embodiment]
Next, a third embodiment of the present invention will be described. The present embodiment is an example in which the behavior of the ON-OFF valve is detected from the maximum operation speed and the minimum operation speed. FIG. 9 is a block diagram showing the configuration of the valve maintenance support device according to the present embodiment, and the same components as those in FIG. 1 are denoted by the same reference numerals.

  The valve maintenance support device according to the present embodiment includes a valve ID storage unit 1, a reception unit 2, an opening storage unit 3, and an opening measurement value for an ON-OFF valve whose ID is stored in the valve ID storage unit 1. A diagnostic index calculating unit 4a that calculates the maximum operating speed and the minimum operating speed as diagnostic indices based on the data; a diagnostic index presenting unit 5 that presents a numerical value of the diagnostic index calculated by the diagnostic index calculating unit 4a; A determining unit 6a for comparing the maximum operating speed and the minimum operating speed calculated as the corresponding thresholds respectively defined in advance, and presenting the determination result of the determining unit 6a, and among the numerical values of the maximum operating speed and the minimum operating speed, For at least one of the ON-OFF valves determined to be equal to or greater than the corresponding threshold, a determination result presentation unit that presents the ID of the valve and a numerical value equal to or greater than the threshold in a format different from normal. It is equipped with a door.

  FIG. 10 is a flowchart illustrating the operation of the valve maintenance support device of the present embodiment. The operations of the receiving unit 2 and the opening storage unit 3 (steps S200 and S201 in FIG. 10) are as described in the first embodiment.

  Next, the diagnostic index calculation unit 4a of the valve maintenance support apparatus of the present embodiment stores the valve ID in the valve ID storage unit 1 for each of the ON-OFF valves that can be maintenance candidates. The maximum operation speed and the minimum operation speed are calculated as diagnostic indices based on the opening degree measurement value data stored in the step S202 (FIG. 10, step S202).

  In this embodiment, as the operating speeds of the ON-OFF valves, the maximum operating speed VOPmax during the opening operation, the minimum operating speed VOPmin during the opening operation, the maximum operating speed VCLmax during the closing operation, and the minimum operating speed during the closing operation are set. The speed VCLmin is calculated. As described above, the opening degree storage unit 3 stores the opening degree measurement value data obtained in time series, the valve ID, and the reception time of the opening degree measurement value data. It is possible to calculate each time and every operation direction.

  In this embodiment, the reason for detecting the minimum operation speed is as follows. The maximum operating speed catches stick-slip in the sliding portion of the valve and jumping when the valve is opened, and thus lacks consistency in the rate of change. On the other hand, by detecting the minimum operation speed as in the present embodiment, factors such as stick-slip and jumping can be eliminated, and the consistency of the speed change can be improved.

  The diagnostic index presenting unit 5 of the valve maintenance support apparatus presents the numerical value of the diagnostic index of each ON-OFF valve calculated by the diagnostic index calculating unit 4a to the operator (Step S203 in FIG. 10). As in the first embodiment, the diagnostic index presenting unit 5 presents information indicating that the ON-OFF valve is to be diagnosed together with the numerical value of the diagnostic index.

  On the other hand, the determination unit 6a of the valve maintenance support device determines whether the absolute value of the diagnostic index of each ON-OFF valve whose valve ID is registered in the valve ID storage unit 1 is equal to or greater than a predetermined threshold value for each valve. A determination is made (step S204 in FIG. 10). In the present embodiment, as the ON-OFF valve diagnostic indices, the maximum operation speed VOPmax during the opening operation, the minimum operation speed VOPmin during the opening operation, the maximum operation speed VCLmax during the closing operation, and the minimum operation during the closing operation The speed VCLmin is calculated.

  The determination unit 6a compares the absolute values of the maximum operating speeds VOPmax and VCLmax during the opening operation and the closing operation with the corresponding maximum operating speed thresholds THmax, and determines the minimum operating speeds VOPmin and VCLmin during the opening operation and the closing operation. May be compared with the corresponding minimum operating speed threshold THmin.

  The reason why the absolute value of the operating speed is compared with the threshold value is that the maximum operating speed VCLmax and the minimum operating speed VCLmin at the time of the closing operation in which the ON-OFF valve moves in the direction in which the opening decreases become negative values. .

  As in the first embodiment, the threshold value THmax is smaller than the upper limit of the maximum operation speed in order to capture the operation change (sign) of the ON-OFF valve before the operation speed reaches the upper limit (maximum allowable value). It is preferable that the threshold value THmin is a value smaller than the upper limit of the minimum operation speed.

The determination result presentation unit 7 of the valve maintenance support device presents the determination result of the determination unit 6a to the operator (FIG. 10, step S205). Specifically, for the ON-OFF valve for which at least one of the operating speeds VOPmax, VOPmin, VCLmax, and VCLmin is determined to be equal to or greater than the corresponding threshold, the determination result presentation unit 7 determines the ID of the ON-OFF valve and a numerical value equal to or greater than the threshold. May be displayed in a different format (for example, displayed in red).
Thus, the processing of steps S200 to S205 in FIG. 10 is performed periodically or when there is an instruction to execute diagnosis from the operator.

FIG. 11 shows an example of the maximum operating speeds VOPmax, VCLmax and the minimum operating speeds VOPmin, VCLmin of the ON-OFF valve in a normal state, and FIG. 12 shows that the maximum operating speeds VOPmax, VCLmax and the minimum operating speeds VOPmin, VCLmin decrease. FIG. 13 is a diagram illustrating an example, and FIG. 13 is a diagram illustrating an example in which the maximum operation speeds VOPmax, VCLmax and the minimum operation speeds VOPmin, VCLmin increase.
The time on the horizontal axis in FIGS. 11 to 13 indicates the time when the operating speeds VOPmax, VCLmax, VOPmin, and VCLmin are calculated.

An implementation example when the valve maintenance support device of the present embodiment is applied to an actual plant is the same as that of the second embodiment, and a description thereof will be omitted.
In this manner, in the present embodiment, it is possible to catch an operation change (sign) of the ON-OFF valve before the operation speed reaches the upper limit, and to assist the operator in selecting an ON-OFF valve as a maintenance candidate. .

  In the present embodiment, as the diagnostic indices, the maximum operation speed VOPmax during the opening operation, the minimum operation speed VOPmin during the opening operation, the maximum operation speed VCLmax during the closing operation, and the minimum operation speed VCLmin during the closing operation are used. Is calculated, but only one of the speeds during the opening operation and the closing operation may be calculated and compared with the threshold value.

  Further, when calculating both the operating speeds during the opening operation and the closing operation, the maximum operating speed threshold THmax during the opening operation and the maximum operating speed threshold THmax during the closing operation are individually set, and The operation speed threshold value THmin and the minimum operation speed threshold value THmin at the time of the closing operation may be individually set.

The valve maintenance support devices described in the first to third embodiments can be realized by a computer having a CPU (Central Processing Unit), a storage device, and an interface, and a program that controls these hardware resources. FIG. 14 shows a configuration example of this computer. The computer includes a CPU 300, a storage device 301, and an interface device (hereinafter, abbreviated as I / F) 302. For example, a valve, a management device, a display, and the like are connected to the I / F 302. In such a computer, a program for implementing the support method of the present invention is stored in the storage device 301. The CPU 300 executes the processing described in the first to third embodiments according to the program stored in the storage device 301.
When the valve maintenance support device is separately mounted on the management device 15 and the computer 16 as shown in the second embodiment, each of them may be realized by the configuration as shown in FIG.

  INDUSTRIAL APPLICATION This invention is applicable to the technique which supports a valve maintenance operation | work.

  1, 211: valve ID storage unit, 2: reception unit, 3: opening degree storage unit, 4, 4a: diagnostic index calculation unit, 5: diagnostic index presentation unit, 6, 6a: determination unit, 7: determination result presentation unit 10-A, 10-C, 10-M: ON-OFF valve; 11-1, 11-3: flow path; 12-A, 12-C, 12-M: flow meter; 13: tank; ... pressure transmitter, 15 ... management device, 16 ... computer, 200 ... ball, 201 ... seat ring, 202 ... stem, 203 ... actuator, 204 ... opening meter, 210 ... opening measurement unit, 212 ... transmission unit.

Claims (9)

A valve ID storage unit configured to store in advance an ID of an ON-OFF valve that can be a maintenance candidate;
An opening storage unit configured to store the opening measurement value data transmitted from the opening meter provided in the ON-OFF valve together with the ID of the ON-OFF valve;
A diagnostic index calculating unit configured to calculate an open / close required time as a diagnostic index based on the opening degree measurement value data for an ON-OFF valve whose ID is stored in the valve ID storage unit;
A diagnostic index presenting unit configured to present a numerical value of the diagnostic index calculated by the diagnostic index calculating unit. The valve maintenance support device according to claim 1,
A determination unit configured to compare the opening / closing required time calculated as the diagnostic index with a corresponding threshold defined in advance;
A determination result presentation unit configured to present the determination result of the determination unit;
For the ON-OFF valve for which the numerical value of the opening / closing required time is determined to be equal to or more than the corresponding threshold value, the determination result presenting unit presents the ID of the valve and the numerical value equal to or more than the threshold value in a format different from normal. And a valve maintenance support device. The valve maintenance support device according to claim 1 or 2,
The valve maintenance support device is characterized in that the opening / closing required time is at least one of a required time of opening 0% → 100% during opening operation and a required time of opening 100% → 0% during closing operation. . A valve ID storage unit configured to store in advance an ID of an ON-OFF valve that can be a maintenance candidate;
An opening storage unit configured to store the opening measurement value data transmitted from the opening meter provided in the ON-OFF valve together with the ID of the ON-OFF valve;
A diagnostic index calculating unit configured to calculate a maximum operating speed and a minimum operating speed as a diagnostic index based on the opening degree measurement value data for an ON-OFF valve whose ID is stored in the valve ID storage unit; ,
A diagnostic index presenting unit configured to present a numerical value of the diagnostic index calculated by the diagnostic index calculating unit. The valve maintenance support device according to claim 4,
A determination unit configured to compare the maximum operation speed and the minimum operation speed calculated as the diagnostic index with corresponding predetermined thresholds, respectively;
A determination result presentation unit configured to present the determination result of the determination unit;
The determination result presenting unit, for an ON-OFF valve for which at least one of the numerical values of the maximum operating speed and the minimum operating speed is determined to be equal to or more than the corresponding threshold, the valve ID and the numerical value equal to or more than the threshold are regarded as normal. A valve maintenance support device characterized by being presented in different formats. The valve maintenance support device according to claim 4 or 5,
The valve maintenance support device, wherein the maximum operation speed and the minimum operation speed are at least one of an opening operation time and a closing operation time. The valve maintenance support device according to any one of claims 1 to 6,
A valve maintenance support device, wherein the diagnostic index presenting unit presents information indicating that an ON-OFF valve is to be diagnosed together with a numerical value of the diagnostic index. A first step of storing the opening measurement value data transmitted from the opening meter provided in the ON-OFF valve together with the ID of the ON-OFF valve;
A second step of calculating an open / close required time as a diagnostic index based on the opening degree measurement value data for an ON-OFF valve that is a candidate for maintenance and whose ID is stored in the valve ID storage unit;
And a third step of presenting the numerical value of the diagnostic index calculated in the second step. A first step of storing the opening measurement value data transmitted from the opening meter provided in the ON-OFF valve together with the ID of the ON-OFF valve;
A second step of calculating a maximum operating speed and a minimum operating speed as a diagnostic index based on the opening measurement value data for an ON-OFF valve that is a candidate for maintenance and whose ID is stored in the valve ID storage unit;
And a third step of presenting the numerical value of the diagnostic index calculated in the second step.