KR102304671B1 - Apparatus and method for supporting maintenance of valve - Google Patents

Abstract

An object of this invention is to improve the operation efficiency of maintenance of an ON-OFF valve.
The valve maintenance support device includes a valve ID storage unit 1 that stores the ID of an ON-OFF valve that can be a maintenance candidate, and the valve ID data transmitted from an opening degree meter installed in the ON-OFF valve. The opening degree storage unit 3 stored together with the , and a diagnostic index calculation unit that calculates the required opening/closing 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 . (4), a diagnostic index presentation unit 5 that presents numerical values of the diagnostic index, a determination unit 6 that compares the required opening/closing time calculated as a diagnostic index with a threshold value, and presenting the determination result of the determination unit 6 and a determination result presentation unit 7 for presenting the ID of the valve and a numerical value equal to or greater than the threshold value of the ON-OFF valve determined to be equal to or greater than the corresponding threshold value in a format different from usual.

Description

APPARATUS AND METHOD FOR SUPPORTING MAINTENANCE OF VALVE

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a technique for supporting a maintenance operation, and more particularly, to a valve maintenance support apparatus and a support method for realizing support for an efficient maintenance operation of an ON-OFF valve.

Since it is necessary to pay particular attention to safety|security especially for the valve (for example, the control valve of FIG. 15) used in a petrochemical plant etc., periodic maintenance is performed. 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 electrical signal into air pressure, and a valve body according to the air pressure supplied from the positioner 101 ( It is composed of a manipulator 102 for manipulating 100).

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

On the other hand, as a type of valve different from the control valve capable of continuously changing the opening degree, there is an ON-OFF valve that can take only two positions of the opening degree: fully open/fully closed, for example, a ball valve, a butterfly valve, or a gate. There is a valve. The ON-OFF valve shown in FIG. 16 uses a ball valve, and has a structure in which a valve chain ball 200 is fitted with a seat ring 201 called a ball seat, and a stem (valve rod) 202 is inserted into an actuator 203 ), the valve can be opened or closed by rotating it 90 degrees. In addition, depending on the type, there is a thing other than 90 degrees.

Most of the ON-OFF valves use solenoid valves, and answer back using limit switches shows only two states of a closed state or an open state. In this case, the operation process of opening and closing the valve is not reflected in the answer back. That is, the answer back function of the ON-OFF valve only issues an alarm at the time of an abnormality, and if an emergency abnormal state is already present when the alarm occurs, the time of treatment is missed.

There is no upper limit that can be said to be complete or sufficient with respect to safety and work efficiency, and the improvement of safety|security and work efficiency is calculated|required further. In particular, in a petrochemical plant or the like, a plurality of valves 10-A, 10-C, 10-M are used, for example, as shown in FIG. 17 . Therefore, a further improvement is calculated|required about the working efficiency of valve maintenance.

[Patent Document 1] Japanese Patent No. 3254624 [Patent Document 2] Japanese Patent No. 6200309 [Patent Document 3] Japanese Patent No. 6216633

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a valve maintenance support apparatus and support method capable of improving the operation efficiency of maintenance of an ON-OFF valve.

The valve maintenance support apparatus of the present invention includes a valve ID storage unit configured to store in advance the ID of an ON-OFF valve that can be a maintenance candidate, and the opening degree measured value data transmitted from an opening meter installed in the ON-OFF valve, an opening degree storage unit configured to be stored together with the ID of the ON-OFF valve; and a time required for opening/closing as a diagnostic index for the ON-OFF valve whose ID is stored in the valve ID storage unit, based on the opening degree measurement value data. It is characterized by comprising: a diagnostic index calculation unit; and a diagnostic index presentation unit configured to present the numerical value of the diagnostic index calculated by the diagnostic index calculation unit.

Further, one configuration example of the valve maintenance support apparatus of the present invention includes a determination unit configured to compare the required opening/closing time calculated as the diagnostic index with a corresponding predefined threshold, and a determination unit configured to present the determination result of the determination unit. Further comprising a result presentation unit, wherein the determination result presentation unit presents an ID of the valve and a numerical value equal to or greater than the threshold value in a format different from usual for an ON-OFF valve whose numerical value of the required opening/closing time is greater than or equal to a corresponding threshold value It is characterized by

Further, in one configuration example of the valve maintenance support device of the present invention, the required time for opening/closing is one of the required time for opening degree 0%→100% during the opening operation and the time required for opening degree 100%→0% during the closing operation. at least one

In addition, the valve maintenance support device of the present invention includes a valve ID storage unit configured to store in advance the ID of an ON-OFF valve that can be a maintenance candidate, and the opening degree measurement value data transmitted from an opening degree meter installed in the ON-OFF valve. , an opening degree storage unit configured to be stored together with the ID of the ON-OFF valve, and an ON-OFF valve in which the ID is stored in the valve ID storage unit, the maximum operating speed and the minimum operating speed based on the opening degree measurement data It is characterized by comprising: a diagnostic index calculation unit configured to calculate as a diagnostic index; and a diagnostic index presentation unit configured to present the numerical value of the diagnostic index calculated by the diagnostic index calculation unit.

Further, one configuration example of the valve maintenance support apparatus of the present invention includes a determination unit configured to compare the maximum operating speed and the minimum operating speed calculated as the diagnostic index, respectively, with corresponding predefined threshold values, and the determination result of the determination unit for an ON-OFF valve determined to be greater than or equal to a corresponding threshold, at least one of the numerical values of the maximum operating speed and the minimum operating speed, further comprising a determination result presentation unit configured to present the ID of the valve. And it is characterized in that the value above the threshold is presented in a different format than usual.

Further, in one configuration example of the valve maintenance support device of the present invention, the maximum operating speed and the minimum operating speed are at least one of an opening operation and a closing operation.

Further, in one configuration example of the valve maintenance support device of the present invention, the diagnostic index presentation unit presents information that transmits that the ON-OFF valve is a diagnostic target together with the numerical value of the diagnostic index. will do

Further, in the valve maintenance support method of the present invention, the first step of storing the opening degree measured value data transmitted from the opening degree meter installed in the ON-OFF valve together with the ID of the ON-OFF valve, and the ID is stored in the valve ID storage unit The second step of calculating the required opening/closing time as a diagnostic index based on the measured opening degree data for an ON-OFF valve that can be a maintenance candidate is presented, and the numerical value of the diagnostic index calculated in this second step is presented. It is characterized in that it includes a third step.

Further, in the valve maintenance support method of the present invention, the first step of storing the opening degree measurement value data transmitted from the opening degree meter installed in the ON-OFF valve together with the ID of the ON-OFF valve, and the ID is stored in the valve ID storage unit. A second step of calculating the maximum operating speed and the minimum operating speed as diagnostic indexes based on the measured opening degree data for an ON-OFF valve that is stored and can be a maintenance candidate, and the diagnosis calculated in the second step It is characterized in that it includes a third step of presenting the numerical value of the indicator.

According to the present invention, for an ON-OFF valve whose ID is stored in the valve ID storage unit, the required opening/closing time is calculated as a diagnostic index based on the opening degree measured value data, and the required opening/closing time is reduced by presenting the numerical value of the diagnostic index. Changes in the operation of the ON-OFF valve before reaching the upper limit can be captured, enabling operators to select ON-OFF valves as candidates for maintenance. As a result, in this invention, the operation efficiency of the maintenance of an ON-OFF valve can be improved.

Further, in the present invention, for an ON-OFF valve whose ID is stored in the valve ID storage unit, the maximum operating speed and the minimum operating speed are calculated as diagnostic indexes based on the opening degree measured value data, and the numerical values of these diagnostic indexes are presented. , it is possible to capture the operation change of the ON-OFF valve before the operation speed reaches the upper limit, which can assist the operator in selecting the ON-OFF valve as a maintenance candidate. As a result, in this invention, the operation efficiency of the maintenance of an ON-OFF valve can be improved.

1 is a block diagram showing the configuration of a valve maintenance support apparatus according to a first embodiment of the present invention.
2 is a flowchart illustrating the operation of the valve maintenance support apparatus according to the first embodiment of the present invention.
3 is a view showing an example of the structure of the ON-OFF valve according to the first embodiment of the present invention.
4 is a block diagram showing the configuration of the opening degree of the ON-OFF valve according to the first embodiment of the present invention.
5 is a view showing an example of an opening operation of an ON-OFF valve.
6 is a view showing an example of the closing operation of the ON-OFF valve.
7 is a view showing an example of presentation of the diagnostic index by the diagnostic index presentation unit and the determination result presentation unit of the valve maintenance support device according to the first embodiment of the present invention.
8 is a diagram showing the configuration of a plant and its device management system according to a second embodiment of the present invention.
9 is a block diagram showing the configuration of a valve maintenance support apparatus according to a third embodiment of the present invention.
10 is a flowchart illustrating an operation of a valve maintenance support apparatus according to a third embodiment of the present invention.
11 is a view showing examples of the maximum operating speed and the minimum operating speed of the ON-OFF valve in a normal state.
12 is a view showing an example in which the maximum operating speed and the minimum operating speed of the ON-OFF valve are decreased.
13 is a view showing an example in which the maximum operating speed and the minimum operating speed of the ON-OFF valve are increased.
Fig. 14 is a block diagram showing a configuration example of a computer for realizing the valve maintenance support apparatus according to the first to third embodiments of the present invention.
15 is a view showing an example of a control valve.
16 is a view showing an example of an ON-OFF valve.
17 is a view showing an example of a plurality of valves used in a tank of a plant.

[Principle of Invention]

Most of the ON-OFF valves have a simple structure using solenoid valves. The inventors paid attention to the point that, by such a simple structure, the foreshadowing of the problem of an ON-OFF valve also appears as an easy-to-understand phenomenon. Then, it was found that the operation speed of the ON-OFF valve is lowered due to the adhesion of scale to the sliding portion mainly of the ON-OFF valve (things with high viscosity or large particles enter the sliding portion). In addition, the ON-OFF valve's sealing parts (ground packing and gasket) wear out and lose its original friction force, which causes the ON-OFF valve to operate at a faster speed than usual (e.g., a valve caused by internal valve biting) occurrence of jumping upon opening) was found.

Then, the inventor installs a sensor capable of detecting the valve opening/closing operation (stroke) in the ON-OFF valve, and by detecting and presenting the behavior from the change in the inclination of the opening/closing operation (or the maximum operating speed and the minimum operating speed), I was thinking about being able to estimate the problem of the ON-OFF valve. Thereby, in this invention, the work efficiency of the maintenance of an ON-OFF valve can be improved.

[First embodiment]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a block diagram showing the configuration of a valve maintenance support apparatus according to a first embodiment of the present invention. This embodiment is an example of detecting the behavior of the ON-OFF valve from the inclination of the opening/closing operation. In the following examples, for simplicity of explanation, examples of valve IDs and the like are assumed to be simpler than those used in actual plants.

The valve maintenance support device includes a valve ID storage unit 1 that stores in advance IDs (identification information) of a plurality of ON-OFF valves that can be maintenance candidates, and an opening degree transmitted from an opening meter installed in the ON-OFF valve. A receiving unit (2) for receiving the measured value data, an opening degree storing unit (3) for storing the opening degree measured value data transmitted from an opening meter installed in the ON-OFF valve together with the ID of the ON-OFF valve, and a valve ID storing unit For the ON-OFF valve whose ID is stored in (1), the diagnostic index calculation unit 4 that calculates the required opening/closing time as a diagnostic index based on the opening degree measured value data, and the diagnostic index calculation unit 4 calculated by the The diagnostic index presentation unit 5 that presents the numerical value of the diagnostic index, the determination unit 6 that compares the required opening/closing time calculated as the diagnostic index with a corresponding predefined threshold, and presenting the determination result of the determination unit 6 And, for an ON-OFF valve whose numerical value of the required opening/closing time is equal to or greater than the corresponding threshold, a determination result presentation unit 7 is provided that presents the ID of the valve and a numerical value equal to or greater than the threshold in a different format than usual.

2 is a flowchart for explaining the operation of the valve maintenance support device of the present embodiment. In this embodiment, for example, assuming that there are 26 valves in the plant, "A", "B", "C", . ,"M", ... It is assumed that unique IDs such as , "X", "Y", and "Z" are assigned in advance. In particular, the valves of valve IDs "A", "C", and "M" are ON-OFF valves using solenoid valves, and these IDs "A", "C", and "M" are stored in the valve ID storage unit 1 ) to be memorized in advance.

An opening degree meter is provided in each ON-OFF valve of valve ID "A", "C", and "M", and the valve opening degree can be measured continuously. 3 is a view showing an example of the structure of the ON-OFF valve of the present embodiment, in which the opening degree 204 is added to the ON-OFF valve shown in FIG. In addition, about the additional position of the opening degree meter 204, it is not limited to the position of FIG. 3, What is necessary is just a position where the opening degree can be measured.

4 is a block diagram showing the configuration of the opening meter 204. As shown in FIG. The opening degree meter 204 is equipped with an opening degree measuring part 210 which continuously measures the valve opening degree by continuously detecting the rotation angle of the stem (valve rod) 202 of the ON-OFF valve, and the opening degree meter 204 . A valve ID storage unit 211 that stores a unique valve ID in the ON-OFF valve used is provided, and a transmission unit 212 that periodically transmits the opening degree measurement value data and the valve ID to the valve maintenance support device.

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

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

Then, the diagnostic index calculation unit 4 of the valve maintenance support device stores the opening degree storage unit for each ON-OFF valve that can be a maintenance candidate whose valve ID is registered in the valve ID storage unit 1 . Based on the opening degree measured value data stored in (3), the required opening/closing time is calculated as a diagnostic index (step S102 in Fig. 2).

In the present embodiment, as the required opening/closing time of the ON-OFF valve, the required time (TOP) for the opening degree 0%→100% and the required time (TCL) for the opening degree 100%→0% are calculated. As described above, since the opening degree storage unit 3 stores the opening degree measured value data obtained in time series and the reception time of the valve ID and the opening degree measured value data, the required opening/closing time is calculated for each ON-OFF valve and each operation direction. it is possible

The diagnostic index presentation unit 5 of the valve maintenance support device presents to the operator the numerical value of the diagnostic index of each ON-OFF valve calculated by the diagnostic index calculation unit 4 (FIG. 2 step S103). At this time, the diagnostic index presentation unit 5 presents information that transmits that an ON-OFF valve that can be a maintenance candidate is a diagnostic target, along with the numerical value of the diagnostic index.

In the present embodiment, since this presentation quantitatively indicates the necessity of paying attention to the ON-OFF valve to the operator who lacks knowledge about the necessity of maintaining the ON-OFF valve, check leakage of the ON-OFF valve The risk of this occurrence can be reduced.

On the other hand, the determination unit 6 of the valve maintenance support device determines for each valve whether 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. A determination is made (FIG. 2 step S104). In this embodiment, both the required time (TOP) of the opening degree 0%→100% and the required time (TCL) of the opening degree 100%→0% are calculated as diagnostic indexes of the ON-OFF valve. The determination unit 6 may compare each of these two 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 (FIG. 2 step S105). Specifically, the determination result presentation unit 7 sets the ID of the valve and the numerical value equal to or greater than the threshold value for the ON-OFF valve determined that at least one of the required opening/closing times TOP and TCL is equal to or greater than the corresponding threshold value. It may be displayed in a format (eg, displayed in red).

In this way, the processing of steps S100 to S105 in Fig. 2 is performed periodically or when an operator has instructed to execute the diagnosis.

Fig. 5 is a diagram showing an example of an opening operation of an ON-OFF valve, and Fig. 6 is a diagram showing an example of a closing operation of an ON-OFF valve.

5 shows an example in which the ON-OFF valve, which was operating as shown in OP1 in a normal state, changed its characteristics as in OP1 → OP2 → OP3, and the time required for opening 0% → 100% (TOP) was gradually delayed. is indicating TOPmax in Fig. 5 is the upper limit of the open-side timer 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 was in the closing operation as shown in CL1 in a normal state, has changed characteristics as shown in CL1→CL2→CL3, and the time required for opening 100%→0% (TCL) is gradually delayed. example is shown. TCLmax in FIG. 6 is an upper limit of the closing-side timer indicating the maximum allowable value of the required time (TCL) for the opening degree of the ON-OFF valve from 100% to 0%.

In addition, in order to capture the change in the operation of the ON-OFF valve before the required opening/closing time reaches the opening/closing timer upper limits (TOPmax, TCLmax), the threshold value TH is preferably smaller than the opening/closing timer upper limits (TOPmax, TCLmax). do.

7 is a diagram showing an example of the presentation of the diagnostic index by the diagnostic index presentation unit 5 and the determination result presentation unit 7 . In the example of FIG. 7 , the diagnostic index of each valve of the valve IDs "A", "C", and "M" is displayed in the area 500 of the screen 50 displayed by the diagnostic index presentation unit 5 . The diagnostic index presenting unit 5 displays information that transmits that the ON-OFF valve is a diagnostic target in the area 501 of the screen 50 . In addition, the diagnostic index presentation unit 5 uses image data prepared in advance, as shown in FIG. 7 , a piping instrumentation diagram 502 of a location where an ON-OFF valve to be diagnosed is installed. ) may be displayed on the screen 50 .

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

In this way, in this embodiment, it is possible to capture the change in the operation of the ON-OFF valve before the required opening/closing time reaches the opening/closing timer upper limit (TOPmax, TCLmax), and the operator selects the ON-OFF valve as a maintenance candidate can support your work.

In addition, in this embodiment, both the required time (TOP) of the opening degree of 0% → 100% in the opening operation and the required time (TCL) of the opening degree of 100% → 0% in the closing operation are calculated as diagnostic indexes, However, either one may be calculated and compared with the threshold value TH.

Further, in the present embodiment, the threshold value TH at the time of the opening operation and at the time of the closing operation is set to the same value. However, since the operation speed of the ON-OFF valve is different between the opening operation and the closing operation in general, the opening side The timer upper limit TOPmax and the closing-side timer upper limit TCLmax may also have different values. Accordingly, in the case of calculating the required opening/closing times TOP and TCL for both the opening operation and the closing operation as in the present embodiment, the corresponding threshold values TH for each of the opening operation and the closing operation are calculated. You may set it individually.

[Second embodiment]

Next, a second embodiment of the present invention will be described. This embodiment describes an example of implementation of the first embodiment. 8 is a diagram showing the configuration of a plant and its equipment management system. In this embodiment, ON-OFF valves 10-A and 10-M of valve IDs "A" and "M" are installed in the flow path 11-1, and ON-OFF valves (10-A, 10-M) of valve ID "C" ( It is assumed that 10-C) is provided in the flow path 11-3. In Fig. 8, reference numerals 12-A, 12-C, and 12-M denote a flow meter, 13 denotes a tank, and 14 denotes a pressure transmitter. In addition, in FIG. 8, description is abbreviate|omitted about valve ID other than "A", "C", and "M".

In the equipment management system of a petroleum and chemical plant, a management device 15 for controlling and managing each equipment of the plant is provided. With respect to 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, in order to handle a large amount of information unique to the plant, the management device 15 ) is preferably mounted.

On the other hand, the diagnostic index presentation unit 5, the determination unit 6, and the determination result presentation unit 7, in principle, provide necessary processing only when determining whether maintenance of the valve is necessary or unnecessary. In addition, it is common for a maintenance implementer (work person in charge of a maintenance entrusted company) to be entrusted by a plant owner company, and to perform maintenance of a plant. Therefore, assuming that a large number of unspecified plants are targeted, a diagnostic index presentation unit 5, a determination unit 6, and a determination result presentation unit ( 7) is preferably mounted.

The plant management device 15 and the computer 16 are temporarily connected using a communication function such as Ethernet (registered trademark) when performing maintenance work.

When the operator starts the application software on the computer 16, the CPU of the computer 16 executes processing according to the program stored in the memory, and the diagnostic index presentation unit 5, the determination unit 6, and the determination result presentation unit 7 ) to realize its function.

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

Based on the displayed valve ID, diagnostic index, and judgment result, the operator confirms the ON-OFF valve to be particularly noted. After confirming the displayed items, the operator cancels the connection between the computer 16 and the management device 15 .

In this way, 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. This embodiment is an example of detecting the behavior of the ON-OFF valve from the maximum operating speed and the minimum operating speed. Fig. 9 is a block diagram showing the configuration of the valve maintenance support device according to the present embodiment, and the same reference numerals as those in Fig. 1 are denoted by the same reference numerals.

The valve maintenance support device of the present embodiment includes a valve ID storage unit 1 , a receiver unit 2 , an opening degree storage unit 3 , and an ON-OFF valve in which 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 indexes based on the opening degree measured value data, and a diagnostic index presentation unit that presents the numerical values of the diagnostic index calculated by the diagnostic index calculating unit 4a (5) and a judging unit 6a for comparing the calculated maximum and minimum operating speeds as diagnostic indicators with corresponding predefined thresholds, respectively, and presenting the determination result of the judging unit 6a, the maximum operating speed and a determination result presentation unit 7 for presenting the ID of the valve and a numerical value above the threshold value in a different format than usual for the ON-OFF valve in which at least one of the numerical value of the and minimum operating speed is determined to be equal to or greater than the corresponding threshold value. .

10 is a flowchart for explaining the operation of the valve maintenance support device of the present embodiment. The operations of the receiving unit 2 and the opening degree storing unit 3 (steps S200 and S201 in Fig. 10) are the same as those described in the first embodiment.

Next, the diagnostic index calculation unit 4a of the valve maintenance support device of the present embodiment, for each ON-OFF valve that can be a maintenance candidate, whose valve ID is registered in the valve ID storage unit 1 , The maximum operating speed and the minimum operating speed are calculated as diagnostic indexes based on the opening degree measured value data stored in the opening degree storage unit 3 (FIG. 10 step S202).

In this embodiment, as the operating speed of the ON-OFF valve, the maximum operating speed during the opening operation (VOPmax), the minimum operating speed during the opening operation (VOPmin), the maximum operating speed during the closing operation (VCLmax), Calculate the minimum operating speed (VCLmin) during the closing operation. As described above, since the opening degree storage unit 3 stores the opening degree measured value data obtained in time series, and the reception time of the valve ID and the opening degree measured value data, it is necessary to calculate the operating speed for each ON-OFF valve and for each operating direction. possible.

In addition, in this embodiment, the reason for detecting the minimum operating speed is as follows. Since the maximum operating speed captures stick-slip in the sliding part of the valve and jumping at the time of valve opening, the consistency of the change rate is insufficient. On the other hand, as in the present embodiment, by detecting the minimum operating speed, factors such as stick-slip and jumping can be eliminated, and the consistency of speed changes can be improved.

The diagnostic index presentation 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 calculation unit 4a to the operator (FIG. 10 step S203). As in the first embodiment, the diagnostic index presentation unit 5 presents information that transmits that the ON-OFF valve is a diagnostic target, together with the numerical value of the diagnostic index.

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

The determination unit 6a compares the respective absolute values of the maximum operating speeds VOPmax and VCLmax in the opening operation and in the closing operation with the corresponding maximum operating speed threshold THmax, and the It is good to compare the respective absolute values of the operating speeds VOPmin and VCLmin with the corresponding minimum operating speed threshold THmin.

In addition, the reason for comparing the absolute value of the operating speed with the threshold is that the maximum operating speed (VCLmax) and the minimum operating speed (VCLmin) during the closing operation in which the ON-OFF valve moves in the direction of decreasing the opening degree become negative values. am.

As in the first embodiment, in order to capture the change in the operation of the ON-OFF valve (thaw) before the operation speed reaches the upper limit (the maximum allowable value), the threshold value THmax is preferably a value smaller than the upper limit of the maximum operation speed, The threshold THmin is preferably smaller than the upper limit of the minimum operating 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, the determination result presentation unit 7 displays the ID of the valve and a numerical value greater than or equal to the threshold value for the ON-OFF valve determined that at least one of the operating speeds VOPmax, VOPmin, VCLmax, and VCLmin is equal to or greater than the corresponding threshold. What is necessary is just to display in a format different from normal (for example, display in red).

In this way, the processing of steps S200 to S205 in Fig. 10 is performed periodically or when an operator has instructed to execute the diagnosis.

11 is a view showing an example of the maximum operating speed (VOPmax, VCLmax) and the minimum operating speed (VOPmin, VCLmin) of the ON-OFF valve in a normal state, FIG. 12 is the maximum operating speed (VOPmax, VCLmax) and the minimum operating speed ( A diagram showing an example in which VOPmin, VCLmin) is decreased, and FIG. 13 is a diagram showing an example in which the maximum operating speed (VOPmax, VCLmax) and the minimum operating speed (VOPmin, VCLmin) are increased.

In addition, the time of the horizontal axis of FIGS. 11-13 has shown the time at which the operation speed (VOPmax, VCLmax, VOPmin, VCLmin) was computed.

Since the implementation example in the case where the valve maintenance support apparatus of this embodiment is applied to an actual plant is the same as that of 2nd Example, description is abbreviate|omitted.

In this way, in the present embodiment, it is possible to capture the change in the operation of the ON-OFF valve before the operation speed reaches the upper limit (afterglow), and it is possible to support the operation of the operator selecting the ON-OFF valve as a maintenance candidate.

Further, in the present embodiment, as diagnostic indicators, the maximum operating speed VOPmax in the opening operation, the minimum operating speed VOPmin in the opening operation, the maximum operating speed VCLmax in the closing operation, and the closing operation Although the minimum operating speed (VCLmin) of is calculated, it is also possible to calculate only one speed between the opening operation and the closing operation and compare it with the threshold value.

Further, in the case of calculating the operating speeds of both the opening operation and the closing operation, the maximum operation speed threshold THmax in the opening operation and the maximum operation speed threshold THmax in the closing operation are separately set, The minimum operating speed threshold THmin at the time of operation and the minimum operating speed threshold THmin at the time of closing operation may be set separately.

The valve maintenance support apparatus described in the first to third embodiments can be realized by a CPU (Central Processing Unit), a computer provided with a storage device and an interface, and a program for controlling 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 . A valve, a management device, a display, etc. are connected to the I/F 302, for example. In such a computer, a program for realizing the supporting 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 in accordance with the program stored in the storage device 301 .

In addition, when the valve maintenance support device is divided into the management device 15 and the computer 16 for mounting as shown in the second embodiment, each of these may be realized with the configuration shown in FIG. 14 .

Industrial Applicability

INDUSTRIAL APPLICABILITY The present invention can be applied to a technology supporting a valve maintenance operation.

1, 211: valve ID storage unit 2: receiver unit
3: opening degree storage unit 4, 4a: diagnostic index calculation unit
5: Diagnostic indicator presentation unit 6, 6a: Judgment unit
7: Judgment result presentation part 10-A, 10-C, 10-M: ON-OFF valve
11-1, 11-3: Euro 12-A, 12-C, 12-M: Flow meter
13 tank 14 pressure transmitter
15: management device 16: computer
200: ball 201: seat ring
202: stem 203: actuator
204: opening degree 210: opening degree measuring unit
212: transmitter

Claims (9)

a valve ID storage unit configured of a solenoid valve and configured to store in advance the ID of an ON-OFF valve that can be a maintenance candidate;
an opening degree storage unit configured to store the opening degree measurement value data transmitted from the opening degree meter installed in the ON-OFF valve together with the ID of the ON-OFF valve;
a diagnostic index calculation unit configured to calculate a required opening/closing time as a diagnostic index based on the opening degree measurement value data for an ON-OFF valve having an ID stored in the valve ID storage unit;
A diagnostic indicator presenting unit configured to present the numerical value of the diagnostic indicator calculated by the diagnostic indicator calculating unit so as to capture a change in the operation of the ON-OFF valve before the opening/closing time reaches the upper limit
A valve maintenance support device comprising a. The method according to claim 1, further comprising: a determination unit configured to compare the required opening/closing time calculated as the diagnostic index with a corresponding predefined threshold;
a judgment result presentation unit configured to present a judgment result of the judgment unit
further comprising, wherein the determination result presentation unit presents the ID of the valve and the numerical value greater than the threshold value in a different format than usual for the ON-OFF valve determined that the numerical value of the required opening/closing time is equal to or greater than the corresponding threshold value Valve maintenance support device characterized by. The time required for opening/closing according to claim 1 or 2, characterized in that the required time for opening/closing is at least one of a time required for an opening degree of 0%→100% during an opening operation and a time required for an opening degree of 100%→0% during a closing operation. valve maintenance support device. a valve ID storage unit configured of a solenoid valve and configured to store in advance the ID of an ON-OFF valve that can be a maintenance candidate;
an opening degree storage unit configured to store the opening degree measurement value data transmitted from the opening degree meter installed in the ON-OFF valve together with the ID of the ON-OFF valve;
a diagnostic index calculation unit configured to calculate a maximum operating speed and a minimum operating speed as diagnostic indexes based on the opening degree measured value data for an ON-OFF valve having an ID stored in the valve ID storage unit;
A diagnostic indicator presenting unit configured to present a numerical value of the diagnostic indicator calculated by the diagnostic indicator calculating unit so as to capture a change in the operation of the ON-OFF valve before the operating speed reaches the upper limit
A valve maintenance support device comprising a. 5. The apparatus according to claim 4, further comprising: a judging unit configured to compare the maximum operating speed and the minimum operating speed calculated as the diagnostic index, respectively, with corresponding predefined thresholds;
a judgment result presentation unit configured to present a judgment result of the judgment unit
Further, the determination result presentation unit, for the ON-OFF valve determined that at least one of the numerical values of the maximum operating speed and the minimum operating speed is equal to or greater than the corresponding threshold value, normally displays the ID of the valve and the numerical value equal to or greater than the threshold value. Valve maintenance support device, characterized in that presented in a different format. The valve maintenance support apparatus according to claim 4 or 5, wherein the maximum operating speed and the minimum operating speed are at least one of an opening operation and a closing operation. 6. The diagnostic index presentation unit according to any one of claims 1, 2, 4, or 5, wherein the diagnostic index presentation unit provides information for transmitting that the ON-OFF valve is a diagnostic object, the numerical value of the diagnostic index and the A valve maintenance support device, characterized in that it is presented together. A first step of storing the opening degree measurement value data transmitted from the opening degree meter installed in the ON-OFF valve constituted of the solenoid valve together with the ID of the ON-OFF valve;
a second step of calculating the required opening/closing time as a diagnostic index based on the opening degree measured value data for an ON-OFF valve that is a candidate for maintenance, the ID of which is stored in the valve ID storage unit;
The third step is to present the numerical value of the diagnostic index calculated in this second step so as to capture the change in the operation of the ON-OFF valve before the opening/closing time reaches the upper limit.
Valve maintenance support method comprising a. A first step of storing the opening degree measurement value data transmitted from the opening degree meter installed in the ON-OFF valve constituted of the solenoid valve together with the ID of the ON-OFF valve;
a second step of calculating the maximum operating speed and the minimum operating speed as a diagnostic index based on the opening degree measured value data for an ON-OFF valve that is a candidate for maintenance, the ID of which is stored in the valve ID storage unit;
The third step is to present the numerical value of the diagnostic index calculated in this second step so as to capture the change in the operation of the ON-OFF valve before the operating speed reaches the upper limit.
Valve maintenance support method comprising a.

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