JPH064862U - Auxiliary equipment monitoring device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide an auxiliary machine monitoring device capable of detecting a symptom of an abnormal operation of an auxiliary machine. [Structure] The increasing tendency of the auxiliary equipment is monitored based on past data of the operating time and the number of times of operation. If it is determined that the number is increasing, an alarm is output. [Effect] The reliability of monitoring the abnormal operation of the auxiliary device can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an auxiliary equipment monitoring device for monitoring the operating status of an auxiliary machine used in a plant or the like and monitoring the operating time and the number of operations of the auxiliary machine.

[0002]

[Prior art]

 Generally, many auxiliaries are used in plants, etc. If these auxiliaries fail, productivity will be greatly affected. Therefore, it is necessary to constantly monitor the operating state of the auxiliary equipment, and an auxiliary equipment monitoring device has been conventionally used. The case where the plant is a hydroelectric power generation facility and the auxiliary machine is a cooling strainer will be described below.

In the conventional auxiliary equipment monitoring device, the operating time per operation of the cooling water strainer was measured, and when the operating time was long, an abnormality such as the sand removal valve of the strainer being caught occurred. Can be detected. In addition, a fixed time is determined, and the number of strainer operations is measured within this fixed time.If this number of operations is large, it is possible to detect that an abnormality such as the mixing of sand and sand into the cooling water pipe has occurred. .

[0004]

[Problems to be solved by the device]

 However, in such a conventional auxiliary equipment monitoring device, it is possible to detect that the operation of the cooling water strainer is abnormal, but it is not possible to know the sign of the abnormality. In other words, in plant equipment, it is desired to detect that an auxiliary machine is abnormal and that it is becoming abnormal.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to provide an auxiliary equipment monitoring device capable of detecting a symptom in the process of detecting an abnormality. To provide.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention relates to an auxiliary machine monitoring device for monitoring the operation of an auxiliary machine used in a plant, etc. It is characterized by having a timer for measuring, means for judging whether or not the operating time measured by the timer has an increasing tendency, and means for outputting an alarm when it is judged that the operating time has an increasing tendency. is there.

In addition, in an accessory monitoring device that monitors the operation of an accessory used in a plant or the like, an interval timer that sets a predetermined interval time, and a counter that counts the number of times the accessory operates within this interval time. It is characterized in that it has means for judging whether or not the number of operations counted by the counter has an increasing tendency, and means for outputting a warning when it is judged that the number of operations has an increasing tendency.

[0008]

[Action]

 In the present invention configured as described above, whether or not these tend to increase is monitored from past operating time data and operating frequency data of the auxiliary machinery. Then, if the operating time and the number of times of operation are increasing, it is judged that the abnormality will occur soon, even if it is not abnormal at present, and an alarm is output. This makes it possible to quickly respond to abnormalities in auxiliary machinery.

[0009]

【Example】

 FIG. 1 is a block diagram showing the configuration of an embodiment of an auxiliary equipment monitoring device to which the present invention is applied. As shown in the figure, this auxiliary equipment monitoring device has an input unit 1 for taking in the operating state of the auxiliary equipment, a timer 2 for measuring one operating time, and whether the measured operating time is larger than a predetermined set value. A comparing unit 3 for determining whether or not the output time, an output unit 4 for outputting a warning when the operation time is larger than a set value, a register 5 for storing the operation time of n times of the operation of the auxiliary machine, and the number of operations of the auxiliary machine A counting unit 7, a calculating unit 6 that calculates an average value of n operation times from the outputs of the register 5 and the counter 7, a register 8 that stores the average value calculated by the calculating unit 3 for three times, and the three times. It has a comparison unit 9 that determines whether or not the average value is continuously increasing, and an output unit 10 that outputs an alarm when it is determined that the average value is increasing.

The accessory monitoring device also includes an interval timer 11 that sets a predetermined interval time, a counter 12 that counts the number of times the auxiliary machine operates within the interval time, and the number of operations and a predetermined set value. Comparing unit 13 for comparing, an output unit 14 for outputting an alarm when the number of operations is large, a register 15 for storing the number of operations within the interval time for n intervals of the interval time, and counting the number of times the interval time has elapsed. Counter 17, a calculation unit 16 that calculates the average number of operations for n times based on the outputs of the registers 15 and 17, a register 18 that stores the average number of operations calculated by the calculation unit 16 for three times, and A comparison unit 19 that determines whether or not the average number of times of operations for a number of times has continuously increased, and an output that outputs an alarm when it is determined that the average operation frequency has increased. And a section 20.

Next, the operation of this embodiment will be described. Now, when an abnormality occurs in the operation of the auxiliary machine and the operating time per operation becomes longer than the set value, the output unit 4 outputs an alarm. If the operating time per operation does not exceed the set value, this operating time is stored in the register 5. Then, when n times (for example, 5 times) of operation times are supplied to the register 5, an average value of the operation times is calculated and output to the register 8. After that, when the average value is supplied three times to the register 8, the average value of the three times is output to the comparison unit 9.

Then, the comparison unit 9 monitors the average value of these three times and determines whether or not there is an increasing tendency. As a result, when it is determined that there is an increasing tendency, the output unit 10 outputs an alarm. In other words, if there is a tendency for the operating time to increase even if the operating time for one time does not exceed the set value, it is judged that there is a sign of abnormality and an alarm is output.

On the other hand, the counter 12 counts the number of times the auxiliary machine operates within the interval time set by the interval timer 11, and supplies this to the comparison unit 13. Then, the comparison unit 13 compares the number of operations with a predetermined set value, and when the number of operations is large, the output unit 14 outputs an alarm.

Further, the register 15 stores the number of operations of the interval time for n times (for example, five times), and the arithmetic unit 16 obtains the average number of operations for n times. After that, the register 18 stores the average number of operations calculated by the calculation unit 16 for three times, and outputs this to the comparison unit 19. Then, the comparison unit 19 monitors the average number of times of three operations and determines whether or not the number of operations is increasing. As a result, when it is determined that there is an increasing tendency, the output unit 20 outputs an alarm. In other words, even if the number of times the auxiliary machine operates within one interval time does not exceed the set value, if the number of operations tends to increase, it is determined that there is a sign of abnormality and an alarm is output. .

In this way, in this embodiment, even if the operating time and the number of times of operation of the auxiliary machine do not become larger than the set values for detecting the abnormality, the increasing tendency is monitored before the abnormality occurs. An alarm is output. Therefore, it is possible to prevent the abnormal operation of the auxiliary machine, and the reliability of the abnormality monitoring of the auxiliary machine is dramatically improved.

[0016]

[Effect of device]

 As described above, according to the present invention, the abnormality of the auxiliary machine is detected and the alarm is output, and the transition period to the abnormal state is monitored and the alarm is output, which can be useful for preventive maintenance and the reliability of the abnormality monitoring can be improved. The effect of remarkably improving is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an auxiliary equipment monitoring device to which the present invention is applied.

[Explanation of Codes] 1 input section 2 timer 3 comparison section 4 output section 5 register 6 calculation section 7 counter 8 register 9 comparison section 10 output section 11 interval timer 12 counter 13 comparison section 14 output section 15 register 16 calculation section 17 counter 18 Register 19 Comparison unit 20 Output unit

Claims (2)

[Scope of utility model registration request] 1. An auxiliary machine monitoring device for monitoring the operation of an auxiliary machine used in a plant or the like, and a timer for measuring the operating time of each of the auxiliary machines and an increasing tendency of the operating time measured by the timer. An auxiliary machine monitoring device, comprising: a means for determining whether or not the above condition exists, and a means for outputting an alarm when it is determined that there is an increasing tendency. 2. An auxiliary machine monitoring device for monitoring the operation of an auxiliary machine used in a plant or the like, and an interval timer for setting a predetermined interval time, and a counter for counting the number of times the auxiliary machine operates within the interval time. An auxiliary machine monitoring device comprising: a unit that determines whether or not the number of operations counted by the counter has an increasing tendency; and a unit that outputs an alarm when it is determined that the operating number has an increasing tendency. .