JPH04157507A - Maintenance supporting device - Google Patents

Abstract

PURPOSE:To enable the scheduled execution of the maintenance and check for each equipment of a plant by outputting the name of equipment reaching service life and outputting the priority of the equipment performing the maintenance based on the importance of the equipment and a service life consumption rate. CONSTITUTION:The maintenance supporting device is equipped with a fault record storage means 1, an equipment data storage means 2, a fault rate evaluation rate 3, a service life estimation means 4, a maintenance optimization means 5, and a maintenance method suggestion means 6. Fault data and operation time data are inputted from each equipment constituting the plant, and the name of equipment reaching service life and the priority order of the check of the equipment requiring check are outputted to be displayed. Thus, the scheduled performance based on the past fault record can be performed on the maintenance and check for each equipment of the plant which is conventionally performed by intuition and experience of a man.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a maintenance support device applied to equipment such as a drainage pump station.

[Conventional technology] Conventionally, maintenance of equipment at drainage pump stations, etc. has been carried out after the fact, that is, after a failure has occurred, failed parts are replaced, and planned maintenance is often not carried out. Ta. Furthermore, the order in which equipment was inspected was not set rationally, and all equipment was often inspected during periodic inspections.

[Problem B that the invention seeks to solve] Maintenance of equipment at conventional drainage pump stations, etc. is often not carried out in a planned manner (though rational implementation based on the track record of maintenance and failure of each equipment is desirable). In other words, the lifespan of equipment is estimated from the history of equipment failures, and equipment that has reached the end of its lifespan is maintained.

However, in a plant consisting of multiple pieces of equipment, it takes a lot of effort to constantly inspect all pieces of equipment. For this reason, it is conceivable to prioritize inspections.

In order to solve the above problems, the present invention provides a maintenance support device that outputs the names of devices that have reached their service life, and also determines and outputs the priority order of devices to be maintained based on the importance of the device and the service life consumption rate. This is what I am trying to do.

[Means for Solving the Problems] The maintenance support device of the present invention includes a failure record storage means for inputting and storing failure data from a plurality of devices constituting a plant, and a failure record storage means for inputting and storing operating time from each of the above devices. equipment data storage means for inputting the failure data of each equipment from the failure record storage means and failure rate evaluation means for inputting the operating time of each equipment from the equipment data storage means; A life evaluation means for inputting the failure probability, a maintenance optimization means for inputting the expected life of each device from the evaluation means, and a maintenance optimization means for inputting the name of the equipment that has reached the end of its life and the inspection priority of the equipment that requires inspection from the same optimization means. The present invention is characterized in that it includes a maintenance method presentation means that presents these together with the maintenance methods for each device.

[Operation] In the above, the failure record storage means and the equipment data storage device respectively input and store failure data and operation time from a plurality of equipments constituting the drainage pump station.

The equipment failure data and operating time stored in the failure record storage means and the equipment data storage device, respectively, are input to the failure rate evaluation means, and the cumulative failure probability is determined.

The cumulative failure probability determined by the failure rate evaluation means is input to the life evaluation means, and the life evaluation means determines the expected life of each device.

The expected lifespan of each device determined by the above-mentioned lifespan evaluation means is input to the maintenance optimization means, which determines the name of the equipment that has reached its lifespan and the priority of inspection of the equipment that requires inspection, and the maintenance method presentation means. presents the maintenance method along with the name and priority of each device.

As a result of the above, it is possible to realize a device that enables maintenance and inspection of each device in a plant to be carried out in a planned manner based on past failure records, instead of conventionally being carried out based on intuition and experience.

[Example] An embodiment of the present invention will be explained with reference to FIG.

The present embodiment shown in FIG. 1 consists of a failure record storage means 1 that inputs and stores failure data etc. from a plurality of devices constituting a drainage pump station, and equipment data that inputs and stores operating hours etc. from each of the above-mentioned devices. Storage means 2, the above-mentioned failure record storage means 1
Failure rate evaluation means 3 inputs the failure data of each device, inputs the operation time of each device from the device data storage means 2, and lifespan inputs the cumulative failure probability of each device from the evaluation means 3. An evaluation means 4, a maintenance optimization means 5 which inputs the expected life of each piece of equipment from the evaluation means 4, and a maintenance optimization means 5 which inputs the name of the equipment that has reached its lifespan and the priority order of inspection of the equipment that requires inspection from the same optimization means 5. A maintenance method presentation means 6 is provided that presents the maintenance method for each device.

In the above, the failure record storage means 1 inputs data from each device and stores the plant salt, device name, time of failure, failure mode, and how maintenance was performed at the time of failure regarding the failed device. .

Further, the equipment data storage means 2 inputs data from each equipment and stores the names, numbers, and operating times of the installed equipment.

The failure rate evaluation means 3 inputs failure data such as the number of failures and failure time from the failure record storage means 1, and inputs the number of devices and operating hours from the equipment data storage means 2. and the cumulative failure rate are determined using the following method.

First, the time since the start of operation is plotted on the horizontal axis, and the data collection period of each device A to H is shown as a result as shown in FIG. In this case, the data collection period does not have to start from the start of operation, and data may be collected from the middle of the operation.

The points at which failures occur in each of the devices A to H during the data collection period are indicated by X marks.

The time since the start of operation is divided into units of time (for example, years), the cumulative operating time for each unit of time is determined, and the number of failures occurring for each unit of time is determined.

Assuming that the cumulative time and the number of failure occurrences at the first unit time are T, , K, respectively, the hazard rate H1 for each unit time is obtained by the following equation.

H,=ni,/Ti Next, the failure rate λ for each unit time is determined by the following equation.

Furthermore, the cumulative failure probability is calculated using the following equation. Here F(i
) is the cumulative failure probability up to the first unit time.

F (i) = 1-exp (-Σ λ,) In the life evaluation means 4, the cumulative failure probability F(i) obtained by the failure rate evaluation means 3 is plotted on Weibull probability paper, and the parameters of the Weibull probability distribution are seek.

Here, the Weibull probability distribution is one whose probability distribution function is expressed by the following equation.

1-exp (-t/lo)') In the above formula, m and to are the shape parameter and scale parameter, respectively. Once the shape parameter m and scale parameter to are determined, the average failure interval is set as life X and the following formula is used. Desired.

X=tor” (1+) Here, r'(x) is a gamma function.

The maintenance optimization means 5 inputs the lifespan of each device from the evaluation means 4, and restores the equipment that has reached the end of its lifespan. Furthermore, for equipment that requires inspection even if it has not reached the end of its lifespan, a priority order is output so that inspection is given priority in descending order of the value obtained from the following equation.

-B Here, A is a numerical value of the importance of the device, and B is a lifetime consumption rate, that is, a value obtained from the following equation.

B=1/(X-t) Here, X is the life span, and is the elapsed time up to the present time.

The maintenance method presentation means inputs the name of the equipment that has reached the end of its service life and the inspection priority of the equipment that requires inspection from the maintenance optimization means 5, presents the maintenance method for each equipment together with the above input data, and performs maintenance. , contributes to the convenience of inspection.

As a result of the above, we have realized a device that enables maintenance and inspection of each device at a drainage pump station to be carried out in a planned manner based on past failure records, instead of being carried out conventionally based on intuition and experience.

〔Effect of the invention〕

The maintenance support device of the present invention inputs failure data, operating time data, etc. from each device that constitutes a plant, and outputs and presents the names of devices that have reached their service life and the priority order of inspection of devices that require inspection. The maintenance and inspection of each equipment in the plant, which used to be done based on intuition and experience, can now be carried out in a planned manner based on past failure records.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of one embodiment of the present invention, and FIG. 2 is an explanatory diagram of data collection procedures according to the above-mentioned embodiment. DESCRIPTION OF SYMBOLS 1... Failure record storage means, 2... Equipment data storage means, 3... Failure rate evaluation means, 4... Life evaluation means, 5
... Maintenance optimization means, 6... Maintenance method presentation means. Agent: Patent attorney Akira Sakama and 2 other people @1g 荊2Z Kyubun

Claims (1)

[Claims] Failure record storage means for inputting and storing failure data from a plurality of devices constituting the plant; equipment data storage means for inputting and storing operating hours from each of the above-mentioned devices; and failure record storage means for inputting and storing failure data from each of the above-mentioned devices; failure rate evaluation means for inputting data and operating time of each equipment from the equipment data storage means; life evaluation means for inputting the cumulative failure probability of each equipment from the same evaluation means; It is equipped with a maintenance optimization means for inputting the expected lifespan, and a maintenance method presentation means for inputting the name of the equipment that has reached the end of its lifespan and the inspection priority of the equipment requiring inspection from the optimization means and presenting them together with the maintenance method for each equipment. A maintenance support device characterized by: