阅读说明：本技术 阀维护辅助装置及辅助方法 (Valve maintenance support device and support method ) 是由 田中雅人 山崎史明 于 2019-08-22 设计创作，主要内容包括：本发明提高开闭阀维护的工作效率。一种阀维护辅助装置,具备：阀ID存储部(1),存储能够成为维护候选的开闭阀的ID；开度存储部(3),将从设于开闭阀的开度计发送的开度测量值数据与阀的ID一起存储；诊断指标算出部(4),针对在阀ID存储部(1)存储有ID的开闭阀,基于开度测量值数据来算出开闭所需时间并作为诊断指标；诊断指标提示部(5),提示诊断指标的数值；判定部(6),将作为诊断指标算出的开闭所需时间与阈值进行比较；以及判定结果提示部(7),提示判定部(6)的判定结果,并针对判定为开闭所需时间的数值为对应阈值以上的开闭阀,以不同于常用的形式提示该阀的ID和阈值以上的数值。(The invention improves the working efficiency of the maintenance of the opening and closing valve. A valve maintenance support device is provided with: a valve ID storage unit (1) that stores the ID of an on-off valve that can be a maintenance candidate; an opening storage unit (3) that stores opening measurement value data transmitted from an opening meter provided on the on-off valve, together with the valve ID; a diagnostic index calculation unit (4) which calculates the opening/closing time required for the opening/closing valve stored with the ID in the valve ID storage unit (1) based on the opening measurement value data and uses the opening/closing time as a diagnostic index; a diagnostic index presentation unit (5) that presents the numerical value of the diagnostic index; a determination unit (6) that compares the time required for opening and closing, which is calculated as a diagnostic index, with a threshold value; and a determination result presentation unit (7) that presents the determination result of the determination unit (6), and presents the ID of the valve and the value of the threshold value or more in a form different from the normal use for the opening/closing valve determined to have the value of the opening/closing required time equal to or greater than the corresponding threshold value.)

1. A valve maintenance support device is characterized by comprising:

a valve ID storage unit which prestores IDs of opening/closing valves which can become maintenance candidates;

an opening storage unit for storing opening measurement value data transmitted from an opening meter provided on an opening/closing valve together with an ID of the opening/closing valve;

a diagnostic index calculation unit that calculates, as a diagnostic index, a time required for opening and closing the opening/closing valve whose ID is stored in the valve ID storage unit, based on the opening measurement value data; and

and a diagnostic index presenting unit that presents the numerical value of the diagnostic index calculated by the diagnostic index calculating unit.

2. The valve maintenance support device according to claim 1, further comprising:

a determination unit that compares the opening/closing required time calculated as the diagnostic index with a predetermined corresponding threshold value; and

a determination result presentation unit that presents the determination result of the determination unit,

the determination result presentation unit presents, in a form different from a normal use, the ID of the valve and the value of the threshold value or more for the opening/closing valve determined that the value of the opening/closing required time is equal to or greater than the corresponding threshold value.

3. Valve maintenance assistance device according to claim 1 or 2,

the opening/closing required time is at least one of a required time for opening 0% → 100% in the opening operation and a required time for opening 100% → 0% in the closing operation.

4. A valve maintenance support device is characterized by comprising:

a valve ID storage unit which prestores IDs of opening/closing valves which can become maintenance candidates;

an opening storage unit for storing opening measurement value data transmitted from an opening meter provided on an opening/closing valve together with an ID of the opening/closing valve;

a diagnostic index calculation unit that calculates a maximum operating speed and a minimum operating speed as diagnostic indices for the opening/closing valve whose valve ID is stored in the valve ID storage unit, based on the opening measurement value data; and

and a diagnostic index presenting unit that presents the numerical value of the diagnostic index calculated by the diagnostic index calculating unit.

5. The valve maintenance support device according to claim 4, further comprising:

a determination unit that compares the maximum operating speed and the minimum operating speed calculated as the diagnostic index with respective predetermined corresponding threshold values; and

a determination result presentation unit that presents the determination result of the determination unit,

the determination result presentation unit presents, in a form different from a usual form, an ID of the valve and a numerical value equal to or larger than a threshold value for the opening/closing valve determined that at least one of the numerical values of the maximum operating speed and the minimum operating speed is equal to or larger than the corresponding threshold value.

6. The valve maintenance assistance device according to claim 4 or 5,

the maximum working speed and the minimum working speed are at least one of speeds at the time of opening and closing.

7. The valve maintenance assistance device according to any one of claims 1 to 6,

the diagnostic index presentation unit presents information indicating that the on-off valve is to be diagnosed, together with a numerical value of the diagnostic index.

8. A valve maintenance assistance method, comprising:

a first step of storing opening degree measurement value data transmitted from an opening degree meter provided on an opening/closing valve together with an ID of the opening/closing valve;

a second step of calculating, as a diagnostic index, a required opening/closing time based on the opening measurement value data for an opening/closing valve that can be a maintenance candidate and has an ID stored in a valve ID storage unit; and

and a third step of presenting the numerical value of the diagnostic index calculated in the second step.

9. A valve maintenance assistance method, comprising:

a first step of storing opening degree measurement value data transmitted from an opening degree meter provided on an opening/closing valve together with an ID of the opening/closing valve;

a second step of calculating a maximum operating speed and a minimum operating speed as diagnostic indices for an on-off valve that can be a maintenance candidate and has an ID stored in a valve ID storage unit, based on the opening degree measurement data; and

and a third step of presenting the numerical value of the diagnostic index calculated in the second step.

Technical Field

The present invention relates to a technique for assisting maintenance work, and more particularly, to a valve maintenance assisting device and a valve maintenance assisting method for assisting effective work for maintenance of an opening/closing valve.

Background

Valves used in petrochemical plant facilities and the like (for example, control valves of fig. 15) require special attention for safety, and therefore, regular maintenance is performed. The control valve shown in fig. 15 is composed of the following components: the valve includes a valve body 100 that opens and closes a passage through which fluid flows, a positioner 101 that converts an input electric signal into air pressure, and an operator 102 that operates the valve body 100 according to the air pressure supplied by the positioner 101.

In a plant facility provided with a plurality of valves shown in fig. 15, in order to improve the work efficiency of valve maintenance, a technique of detecting the occurrence of stick-slip phenomenon at a sliding portion of a valve (see patent document 1), a technique of determining a hunting state of a valve (see patent document 2), a technique of detecting adhesion of scale to a valve (see patent document 3), and the like have been proposed.

On the other hand, as another valve different from the control valve capable of continuously changing the opening degree, there are opening and closing valves such as a ball valve, a butterfly valve, and a gate valve, and the opening and closing valve can only adopt two positions of opening degree, full open/full close. The opening/closing valve shown in fig. 16 uses a ball valve in which a ball 200 as a valve body is sandwiched by a seat ring 201 called a ball seat, and the valve can be opened or closed by rotating a rod (valve stem) 202 by 90 degrees by an actuator 203. Some types are also rotated by degrees other than 90 degrees.

Most of the on-off valves use an electromagnetic valve, and the response using a limit switch indicates only two states, i.e., a closed state and an open state. In this case, the operation process of opening and closing the valve is not reflected in the response. That is, the response function of the on-off valve only gives an alarm when an abnormality occurs, and if the abnormal state is already urgent when the alarm is given, the process is late.

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

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made to solve the above-described problems, and an object thereof is to provide a valve maintenance support device and a support method that can improve the work efficiency of valve maintenance.

Means for solving the problems

The valve maintenance support device according to the present invention is characterized by comprising: a valve ID storage unit which prestores IDs of opening/closing valves which can become maintenance candidates; an opening storage unit for storing opening measurement value data transmitted from an opening meter provided on an opening/closing valve together with an ID of the opening/closing valve; a diagnostic index calculation unit that calculates, as a diagnostic index, a time required for opening and closing the opening/closing valve whose ID is stored in the valve ID storage unit, based on the opening measurement value data; and a diagnostic index presenting unit that presents the numerical value of the diagnostic index calculated by the diagnostic index calculating unit.

In addition, according to an embodiment of the present invention, there is provided a valve maintenance support device including: a determination unit that compares the opening/closing required time calculated as the diagnostic index with a predetermined corresponding threshold value; and a determination result presentation unit that presents the determination result of the determination unit, wherein the determination result presentation unit presents, in a form different from a normal use, the ID of the valve and the value of the threshold value or more for the opening/closing valve determined that the value of the opening/closing required time is equal to or greater than the corresponding threshold value.

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

Further, the valve maintenance support device according to the present invention includes: a valve ID storage unit which prestores IDs of opening/closing valves which can become maintenance candidates; an opening storage unit for storing opening measurement value data transmitted from an opening meter provided on an opening/closing valve together with an ID of the opening/closing valve; a diagnostic index calculation unit that calculates a maximum operating speed and a minimum operating speed as diagnostic indices for the opening/closing valve whose valve ID storage unit stores the ID, based on the opening measurement value data; and a diagnostic index presenting unit that presents the numerical value of the diagnostic index calculated by the diagnostic index calculating unit.

In addition, according to an embodiment of the present invention, there is provided a valve maintenance support device including: a determination unit that compares the maximum operating speed and the minimum operating speed calculated as the diagnostic index with respective predetermined corresponding threshold values; and a determination result presentation unit that presents the determination result of the determination unit, wherein the determination result presentation unit presents the ID of the valve and the value equal to or larger than the threshold value in a form different from a usual form for the on-off valve determined to have at least one of the values of the maximum operating speed and the minimum operating speed equal to or larger than the corresponding threshold value.

In addition, 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 speeds during the opening operation and during the closing operation.

In one configuration example of the valve maintenance support device according to the present invention, the diagnostic index presentation unit presents information indicating that the on-off valve is to be diagnosed together with a numerical value of the diagnostic index.

Further, a valve maintenance support method according to the present invention includes: a first step of storing opening degree measurement value data transmitted from an opening degree meter provided on an opening/closing valve together with an ID of the opening/closing valve; a second step of calculating, as a diagnostic index, a required opening/closing time based on the opening degree measurement data for an opening/closing valve that can be a maintenance candidate and has an ID stored in a valve ID storage unit; and a third step of presenting the numerical value of the diagnostic index calculated in the second step.

Further, a valve maintenance support method according to the present invention includes: a first step of storing opening degree measurement value data transmitted from an opening degree meter provided on an opening/closing valve together with an ID of the opening/closing valve; a second step of calculating a maximum operating speed and a minimum operating speed as diagnostic indices for an on-off valve that can be a maintenance candidate and has an ID stored in a valve ID storage unit, based on the opening degree measurement data; and a third step of presenting the numerical value of the diagnostic index calculated in the second step.

[ Effect of the invention ]

According to the present invention, by calculating the required opening/closing time as a diagnostic index based on the measured opening degree data for the opening/closing valve having the ID stored in the valve ID storage unit and presenting the numerical value of the diagnostic index, it is possible to capture the change in operation of the opening/closing valve before the required opening/closing time reaches the upper limit, and it is possible to assist the operator in selecting the operation of the opening/closing valve that is a maintenance candidate. As a result, in the present invention, the work efficiency of the maintenance of the opening/closing valve can be improved.

In the present invention, the maximum operating speed and the minimum operating speed are calculated as the diagnostic indicators for the on-off valve whose ID is stored in the valve ID storage unit based on the opening degree measurement data, and the numerical value of the diagnostic indicator is presented, whereby the change in operation of the on-off valve before the operating speed reaches the upper limit can be captured, and the operator can be assisted in selecting the operation of the on-off valve that is a maintenance candidate. As a result, in the present invention, the work efficiency of the maintenance of the opening/closing valve can be improved.

Drawings

Fig. 1 is a block diagram showing a configuration of a valve maintenance support device according to a 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 showing an example of the structure of the opening/closing valve in the first embodiment of the present invention.

Fig. 4 is a block diagram showing a structure of an opening degree meter of the opening/closing valve according to the first embodiment of the present invention.

Fig. 5 is a diagram showing an example of an opening operation of the opening/closing valve.

Fig. 6 is a diagram showing an example of the closing operation of the on-off valve.

Fig. 7 is a diagram showing an example of presentation of a 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.

Fig. 8 is a diagram showing a configuration of a plant and a plant management system thereof according to a second embodiment of the present invention.

Fig. 9 is a block diagram showing a configuration of a valve maintenance support device according to a 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 showing an example of the maximum operating speed and the minimum operating speed of the opening and closing valve in the normal state.

Fig. 12 is a diagram showing an example of a decrease in the maximum operating speed and the minimum operating speed of the opening/closing valve.

Fig. 13 is a diagram showing an example of an increase in the maximum operating speed and the minimum operating speed of the opening-closing valve.

Fig. 14 is a block diagram showing an example of a configuration of a computer for implementing the valve maintenance support device according to the first to third embodiments of the present invention.

Fig. 15 is a diagram showing an example of the control valve.

Fig. 16 is a diagram showing an example of the opening/closing valve.

Fig. 17 is a diagram showing an example of a plurality of valves used in a tank of a plant.

Detailed Description

[ inventive principles ]

Most of the opening and closing valves are simple structures using electromagnetic valves. The inventors have noticed that, with such a simple structure, the signs of the malfunctioning of the opening and closing valve can also appear as phenomena that are easy to understand. Furthermore, the inventors have also found that: the operating speed of the on-off valve is reduced mainly by the adhesion of scale (high-viscosity substances or large particles enter the sliding portion) to the sliding portion of the on-off valve. Moreover, the inventors have also found that: the seal member (gland seal, gasket) of the opening and closing valve is worn away and loses its original frictional force, so that the opening and closing valve operates at a higher speed than usual (for example, the occurrence of bouncing when the valve is opened due to engagement of the internal valve).

Also, the inventors thought: the opening/closing valve is provided with a sensor capable of detecting the opening/closing operation (stroke) of the valve, and the behavior of the opening/closing valve is detected and presented based on the change in the inclination (or the maximum operating speed and the minimum operating speed) of the opening/closing operation, whereby the failure of the opening/closing valve can be estimated. Therefore, in the present invention, the work efficiency of the maintenance of the opening and closing 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 a configuration of a valve maintenance support device according to a first embodiment of the present invention. The present embodiment is an example of detecting the behavior of the opening and closing valve from the inclination of the opening and closing action. In the following embodiments, for the sake of simplicity of explanation, the ID case of the valve and the like are made simpler than those used in actual plant equipment.

The valve maintenance support device is provided with: a valve ID storage unit 1 which prestores IDs (identification information) of a plurality of opening/closing valves that can be maintenance candidates; a receiving unit 2 that receives opening degree measurement value data transmitted from an opening degree meter provided on the on-off valve; an opening storage unit 3 for storing opening measurement value data transmitted from an opening meter provided on an opening/closing valve together with an ID of the opening/closing valve; a diagnostic index calculation unit 4 that calculates, as a diagnostic index, a time required for opening and closing the opening/closing valve whose ID is stored in the valve ID storage unit 1, based on the opening measurement value data; a diagnostic index presentation unit 5 that presents the numerical value of the diagnostic index calculated by the diagnostic index calculation unit 4; a determination unit 6 that compares the opening/closing required time calculated as a diagnostic index with a predetermined corresponding threshold value; and a determination result presentation unit 7 that presents the determination result of the determination unit 6, and presents the ID of the valve and the value of the threshold value or more in a format different from the normal use for the opening/closing valve determined to have the value of the opening/closing required time equal to or more than the corresponding threshold value.

Fig. 2 is a flowchart illustrating the operation of the valve maintenance support device according to the present embodiment. In the present embodiment, for example, assuming that 26 valves are provided in a plant facility, unique IDs such as "a", "B", "C", …, "M", …, "X", "Y", and "Z" are assigned to the 26 valves in advance. In particular, the valves of the valves ID "a", "C", and "M" are opening and closing valves using electromagnetic valves, and the valves ID "a", "C", and "M" are stored in the valve ID storage unit 1 in advance.

Opening meters are provided on the opening and closing valves of the valves ID "a", "C", and "M" so that the valve opening degree can be continuously measured. Fig. 3 is a diagram showing an example of the structure of the on-off valve of the present embodiment, and is a diagram in which an opening meter 204 is added to the on-off valve shown in fig. 16. The position to which the opening degree meter 204 is added is not limited to the position shown in fig. 3, and may be any position at which the opening degree can be measured.

Fig. 4 is a block diagram showing the structure of the meter 204. The opening degree meter 204 includes: an opening degree measuring section 210 that continuously measures a valve opening degree by continuously detecting a rotation angle of a rod (valve stem) 202 of the opening and closing valve; a valve ID storage unit 211 that stores a valve ID unique to the opening/closing valve to which the opening meter 204 is attached; 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 adds the valve ID stored in the valve ID storage unit 211 to the opening degree measurement value data and transmits the added value. In addition, since it is necessary to continuously obtain the opening degree of the opening-closing valve, the measurement/transmission cycle of the opening degree measurement data needs to be shorter than the minimum value that may occur in the time required for opening and closing the opening-closing valve.

When the opening degree measurement value data is received from each opening and closing valve (yes in step S100 in fig. 2), the receiving unit 2 of the valve maintenance support device stores the received opening degree measurement value data, the valve ID added to the opening degree measurement value data, and the receiving timing of the opening degree measurement value data in the opening degree storage unit 3 (step S101 in fig. 2).

Next, the diagnostic index calculation unit 4 of the valve maintenance support device calculates, as a diagnostic index, a time required for opening and closing each of the opening and closing valves that can be maintenance candidates and have the valve ID registered in the valve ID storage unit 1, based on the opening degree measurement data stored in the opening degree storage unit 3 (step S102 in fig. 2).

In the present embodiment, as the opening and closing required time of the opening and closing valve, the required time TOP of opening degree 0% → 100% and the required time TCL of opening degree 100% → 0% are calculated. As described above, since the opening degree storage unit 3 stores the opening degree measurement value data, the valve ID, and the reception timing of the opening degree measurement value data obtained in time series, the opening and closing time can be calculated for each opening and closing valve and for each operation direction.

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 4 to the operator (step S103 in fig. 2). At this time, the diagnostic index presentation 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, the necessity of paying attention to the on-off valve is quantitatively shown to an operator who knows little about the necessity of maintenance of the on-off valve through such presentation, and therefore, the risk of occurrence of missing detection of the on-off valve can be reduced.

On the other hand, the determination unit 6 of the valve maintenance support device determines whether or not the diagnostic index of each opening/closing valve having a valve ID registered in the valve ID storage unit 1 is equal to or greater than a predetermined threshold TH for each valve (step S104 in fig. 2). In the present embodiment, both the required time TOP with an opening degree of 0% → 100% and the required time TCL with an opening degree of 100% → 0% are calculated as the diagnostic indicators of the on-off valve. The determination unit 6 may compare the two required times TOP and TCL with the threshold 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, the determination result presentation unit 7 may display the ID of the valve and the numerical value equal to or larger than the threshold value in a different form from a usual form (for example, red display) for the opening/closing valve determined to have at least one of the opening/closing required times TOP and TCL equal to or larger than the corresponding threshold value.

In this manner, the processes of steps S100 to S105 of fig. 2 are periodically performed, or the processes of steps S100 to S105 of fig. 2 are performed when an operator gives an instruction to execute a diagnosis.

Fig. 5 is a diagram showing an example of an opening operation of the on-off valve, and fig. 6 is a diagram showing an example of a closing operation of the on-off valve.

Fig. 5 shows an example in which the characteristic of the opening/closing valve that is opened by the opening operation shown by the OP1 in the normal state changes so as to be OP1 → OP2 → OP3, and the required time TOP of the opening degree 0% → 100% gradually slows down. TOPmax in fig. 5 is an opening-side timer upper limit indicating a maximum allowable value of the required time TOP for opening the opening-closing valve to be 0% → 100%.

On the other hand, fig. 6 shows an example in which the characteristic of the opening/closing valve in which the closing operation shown by CL1 is performed in the normal state changes so as to be CL1 → CL2 → CL3, and the required time TCL of the opening degree 100% → 0% gradually slows down. TCLmax in fig. 6 is a closing-side timer upper limit indicating a maximum allowable value of the required time TCL for opening degree of the opening/closing valve to 100% → 0%.

In order to capture the change (sign) in the operation of the on-off valve before the time required for opening and closing reaches the upper limits of the on-off timers TOPmax and TCLmax, the threshold TH is preferably smaller than the upper limits of the on-off timers TOPmax and TCLmax.

Fig. 7 is a diagram showing an example of 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 having 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 presentation unit 5 displays information indicating that the on-off valve is to be diagnosed in the area 501 of the screen 50. The diagnostic index presentation unit 5 may display, on the screen 50, a meter diagram 502 of the duct in which the opening/closing valve to be diagnosed is disposed as shown in fig. 7, using image data prepared in advance.

In the present embodiment, the threshold TH is set to 1.5 seconds (1/2 values of TOPmax and TCLmax described above). In the example of fig. 7, in the diagnostic index of the on-off valve of the valve ID "M", the required time of 0% → 100% opening is 1.8 seconds, and the required time of 100% → 0% opening is 1.7 seconds. Therefore, the determination result presentation unit 7 displays the numerical values of the opening/closing required times and the valve IDs in a color different from the opening/closing required times of the other opening/closing valves (in the example of fig. 7, the black matrix and the white matrix).

As described above, in the present embodiment, it is possible to capture the change (sign) in the operation of the on-off valve before the time required for opening and closing reaches the opening and closing timer upper limits TOPmax and TCLmax, and to assist the operator in selecting the operation of the on-off valve to be a maintenance candidate.

In the present embodiment, both the required time TOP of the opening degree 0% → 100% during the opening operation and the required time TCL of the opening degree 100% → 0% during the closing operation are calculated as the diagnostic indexes, but only one of them may be calculated and compared with the threshold TH.

In the present embodiment, although the threshold value TH is set to the same value during the opening operation and the closing operation, the operating speeds of the opening and closing valves are generally different between the opening operation and the closing operation, and therefore the opening-side timer upper limit TOPmax and the closing-side timer upper limit TCLmax may have 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 corresponding threshold TH may be set for each of the opening operation and the closing operation.

[ second embodiment ]

Next, a second embodiment of the present invention will be explained. This embodiment will explain an installation example of the first embodiment. Fig. 8 is a diagram showing a configuration of a plant and a plant management system thereof. In the present embodiment, the on-off valves 10-A, 10-M of the valves ID "A", "M" are disposed in the flow path 11-1, and the on-off valve 10-C of the valve ID "C" is disposed in the flow path 11-3. In FIG. 8, 12-A, 12-C, and 12-M are flow measuring instruments, 13 is a tank, and 14 is a pressure transmitter. In fig. 8, description of valves other than those having valve IDs "a", "C", and "M" is omitted.

The facility management system for petroleum and chemical plant facilities is provided with a management apparatus 15 for controlling and managing each facility of the plant facilities. The valve ID storage unit 1, the receiving unit 2, the opening storage unit 3, and the diagnostic index calculation unit 4 described in the first embodiment are preferably installed in the management device 15 because a large amount of information unique to plant equipment is to be processed.

On the other hand, the diagnosis index presentation unit 5, the determination unit 6, and the determination result presentation unit 7 basically provide only necessary processing when determining whether or not maintenance is necessary for the valve. Further, maintenance personnel (staff acting on the maintenance request enterprise) usually perform maintenance of plant equipment by being requested by the enterprise to which the plant equipment belongs. Therefore, assuming that a plurality of plant facilities of an indefinite number are targeted, it is preferable that the diagnosis index presentation unit 5, the determination unit 6, and the determination result presentation unit 7 are installed on a computer 16 carried by a staff (operator) in the maintenance requesting enterprise.

When performing the maintenance work, the management apparatus 15 of the plant equipment and the computer 16 are temporarily connected by a communication function such as ethernet (registered trademark).

When the operator opens the application software on the computer 16, the CPU of the computer 16 executes processing in accordance with the program stored in the memory, thereby realizing the functions as the diagnosis index presenting unit 5, the determination unit 6, and the determination result presenting unit 7.

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 the diagnostic index on the display of the computer 16 (step S103 in fig. 2). Then, 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 the opening/closing valve to be paid special attention based on the displayed valve ID, the diagnostic index, and the determination result. After confirming the displayed matter, the operator disconnects the computer 16 from the management apparatus 15.

In this manner, the valve maintenance assistance device explained in the first embodiment can be applied to actual plant equipment.

[ third embodiment ]

Next, a third embodiment of the present invention will be explained. The present embodiment is an example of detecting the behavior of the opening-closing 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 in the present embodiment, and the same components 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 receiving section 2; an opening storage unit 3; a diagnostic index calculation unit 4a that calculates a maximum operating speed and a minimum operating speed based on the opening measurement data for the on-off valve whose ID is stored in the valve ID storage unit 1, and uses the calculated maximum operating speed and minimum operating speed as diagnostic indices; a diagnostic index presentation unit 5 that presents the numerical value of the diagnostic index calculated by the diagnostic index calculation unit 4 a; a determination unit 6a for comparing the maximum operating speed and the minimum operating speed calculated as diagnostic indices with respective predetermined corresponding threshold values; and a determination result presentation unit 7 that presents the determination result of the determination unit 6a and presents the ID of the valve and the value equal to or larger than the threshold value in a form different from a normal use for the on-off valve determined to have at least one of the values of the maximum operating speed and the minimum operating speed equal to or larger than the corresponding threshold value.

Fig. 10 is a flowchart illustrating the operation of the valve maintenance support device according to the present embodiment. The operations of the reception unit 2 and the opening degree 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 according to the present embodiment calculates the maximum operating speed and the minimum operating speed as diagnostic indices based on the opening degree measurement data stored in the opening degree storage unit 3 for each opening and closing valve that can be a maintenance candidate with the valve ID registered in the valve ID storage unit 1 (step S202 in fig. 10).

In the present embodiment, as the operation speed of the on-off valve, 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 calculated. As described above, since the opening degree storage unit 3 stores the opening degree measurement value data, the valve ID, and the reception timing of the opening degree measurement value data obtained in time series, the operation speed can be calculated for each opening/closing valve and for each operation direction.

In the present embodiment, the reason for detecting the minimum operating speed is as follows. There is a lack of uniformity in the rate of change of the maximum operating speed due to stick-slip at the sliding portion of the valve or bounce as the valve opens. On the other hand, as in the present embodiment, by detecting the minimum operating speed, such factors as stick-slip and bouncing can be eliminated, and the consistency of the speed change 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 (step S203 in fig. 10). As in the first embodiment, the diagnostic index presentation unit 5 presents information notifying 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 or not the absolute value of the diagnostic index of each opening/closing valve having a valve ID registered in the valve ID storage unit 1 is equal to or greater than a predetermined threshold value for each valve (step S204 in fig. 10). In the present embodiment, 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 VCLmin during the closing operation are calculated as the diagnostic indices of the on-off valve.

The determination unit 6a may compare 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 threshold THmax, and may compare the absolute values of the minimum operating speeds VOPmin and VCLmin during the opening operation and the closing operation 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 during the closing operation in which the opening/closing valve moves become negative values in the direction in which the opening degree decreases.

As in the first embodiment, in order to capture a change (sign) in the operation of the opening-closing valve before the operating speed reaches the upper limit (maximum allowable value), the threshold value THmax is preferably a value smaller than the upper limit of the maximum operating speed, and the threshold value THmin is preferably a value 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 (step S205 in fig. 10). Specifically, the determination result presentation unit 7 may display the ID of the valve and the numerical value equal to or larger than the threshold value in a form different from a usual form (for example, red display) for the on-off valve determined to have at least one of the operating speeds VOPmax, VOPmin, VCLmax, and VCLmin equal to or larger than the corresponding threshold value.

In this manner, the processes of steps S200 to S205 in fig. 10 are periodically performed, or the processes of steps S200 to S205 are performed when an operator gives an instruction to execute a diagnosis.

Fig. 11 is a diagram showing examples of the maximum operating speeds VOPmax, VCLmax and the minimum operating speeds VOPmin, VCLmin of the opening and closing valves in the normal state, fig. 12 is a diagram showing examples of the maximum operating speeds VOPmax, VCLmax and the minimum operating speeds VOPmin, VCLmin decreasing, and fig. 13 is a diagram showing examples of the maximum operating speeds VOPmax, VCLmax and the minimum operating speeds VOPmin, VCLmin increasing.

The time on the horizontal axis in fig. 11 to 13 indicates the time when the operating speeds VOPmax, VCLmax, VOPmin, and VCLmin are calculated.

The installation example when the valve maintenance auxiliary device of this embodiment is applied to actual plant equipment is the same as that of the second embodiment, and therefore, the description thereof is omitted.

As described above, in the present embodiment, it is possible to capture a change (sign) in the operation of the on-off valve before the operation speed reaches the upper limit, and to assist the operator in selecting the operation of the on-off valve that is a maintenance candidate.

In the present embodiment, 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 VCLmin during the closing operation are calculated as the diagnostic indices, but only one of the speeds during the opening operation and the closing operation may be calculated and compared with the threshold value.

In addition, when calculating the operation speeds of both the opening operation and the closing operation, the maximum operation speed threshold value THmax during the opening operation and the maximum operation speed threshold value THmax during the closing operation may be set separately, and the minimum operation speed threshold value THmin during the opening operation and the minimum operation speed threshold value THmin during the closing operation may be set separately.

The valve maintenance support device described in the first to third embodiments can be realized by a computer including a cpu (central processing unit), a storage device, and an interface, and a program for controlling these hardware resources. Fig. 14 illustrates a configuration of the computer. The computer is provided with: a CPU300, a storage device 301, and an interface device (hereinafter, simply referred to as I/F) 302. The I/F302 is connected to a valve, a management device, a display, and the like, for example. In such a computer, a program for implementing the assist method of the present invention is stored in the storage device 301. The CPU300 executes the processes described in the first to third embodiments in accordance with the programs stored in the storage device 301.

In addition, as shown in the second embodiment, when the valve maintenance assisting device is separately installed to the management device 15 and the computer 16, each of them may be realized by the configuration shown in fig. 14.

Industrial applicability

The present invention can be applied to a technique for assisting valve maintenance work.

Description of the symbols

1. 211 … valve ID storage section, 2 … receiving section, 3 … opening degree storage section, 4a … diagnosis index calculation section, 5 … diagnosis index presentation section, 6a … determination section, 7 … determination result presentation section, 10-A, 10-C, 10-M … opening and closing valve, 11-1, 11-3 … flow path, 12-A, 12-C, 12-M … flow rate measuring device, 13 … tank, 14 … pressure transmitter, 15 … management device, 16 … computer, 200 … ball, 201 … valve seat ring, 202 … rod, 203 … actuator, 204 … opening degree meter, 210 … opening degree measurement section, 212 … transmission section.