WO2019102812A1 - Compressed gas production device - Google Patents
Compressed gas production device Download PDFInfo
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- WO2019102812A1 WO2019102812A1 PCT/JP2018/040655 JP2018040655W WO2019102812A1 WO 2019102812 A1 WO2019102812 A1 WO 2019102812A1 JP 2018040655 W JP2018040655 W JP 2018040655W WO 2019102812 A1 WO2019102812 A1 WO 2019102812A1
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- gas
- gas compressors
- compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0292—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
Definitions
- the present invention relates to a compressed gas production apparatus provided with a plurality of gas compressors and a control device for controlling the number of operating gas compressors.
- Patent Document 1 includes a plurality of gas compressors (compressors), a reservoir for storing compressed gas (compressed air) discharged from the plurality of gas compressors, and a pressure sensor for detecting the pressure in the reservoir.
- a compressed gas manufacturing apparatus compression system including a control device that controls the number of operating gas compressors based on the pressure detected by a pressure sensor.
- the control device controls the number of operating gas compressors so that the pressure detected by the pressure sensor falls within a predetermined range set in advance. Specifically, for example, one of the plurality of gas compressors is operated as a transmission gas compressor, and the remaining ones are operated as a constant speed gas compressor or stopped. Then, the rotational speed of the shift gas compressor is variably controlled such that the pressure detected by the pressure sensor becomes a preset target value. Also, for example, when the rotation speed of the shift gas compressor is maximized, and the pressure detected by the pressure sensor is likely to decrease to a preset lower limit (in other words, the amount of compressed gas used increases) Increase the number of gas compressors for constant speed operation.
- control device selects a gas compressor to be operated so that the operation time (cumulative operation time) of each gas compressor is averaged.
- maintenance of a plurality of gas compressors constituting a compressed gas production apparatus is performed regularly (for example, every year) and at the same timing with each other, and operation of each gas compressor at the time of the maintenance
- the maintenance rank (maintenance standard) of each gas compressor is determined based on the time. That is, if the operating time of the gas compressor at the time of maintenance is below the upper limit value corresponding to a relatively low maintenance rank, the maintenance rank will be low, but if it exceeds the above-mentioned upper limit, the maintenance rank will be high. And if a maintenance rank becomes high, a maintenance item (items, such as a part inspection, cleaning, or replacement
- This invention is made in view of the said matter, and makes it a subject to suppress maintenance cost corresponding to the total operating time of several gas compressors.
- the present invention includes a plurality of means for solving the above problems, and an example thereof is a compression comprising a plurality of gas compressors and a control device for controlling the number of operating gas compressors.
- the control device obtains an operation time of each of the plurality of gas compressors at present, and estimates a total operation time of the plurality of gas compressors at the time of future maintenance based thereon A relationship between an operating time estimation unit, a total operating time of the plurality of gas compressors, and an upper limit value of each operating time of the plurality of gas compressors corresponding to a maintenance rank of each of the plurality of gas compressors.
- the upper limit value of the operation time of each of the plurality of gas compressors is set according to the total operation time estimated by the total operation time estimation unit using a table, and based on this, each of the plurality of gas compressors Control unit that controls the number of operating gas compressors, and selects the number of operating gas compressors to be operated based on the priority set by the priority setting unit.
- maintenance costs can be reduced corresponding to the total operating time of a plurality of gas compressors.
- FIG. 1 is a schematic view showing a configuration of a compressed gas production apparatus in the present embodiment.
- solid arrows indicate the flow of compressed gas (compressed air in the present embodiment)
- broken arrows indicate the flow of electrical signals.
- the compressed gas production apparatus includes compressed gas discharged from five gas compressors (compressor units) 1A, 1B, 1C, 1D, 1E and gas compressors 1A, 1B, 1C, 1D, 1E.
- the storage tank 2 for storing the compressed gas in the storage tank 2 is supplied to the compressed gas use line.
- the compressed gas production device includes a pressure sensor 3 that detects the pressure in the storage tank 2 and a control device 4 that controls the number of operating gas compressors based on the pressure detected by the pressure sensor 3. .
- the control device 4 includes an arithmetic control unit (for example, a CPU) that executes arithmetic processing and control processing based on a program, and a storage unit (for example, a ROM and a RAM) that stores the program and the result of the arithmetic processing.
- arithmetic control unit for example, a CPU
- a storage unit for example, a ROM and a RAM
- Each of the gas compressors (compressor units) 1A to 1E controls a compressor main body 5 for compressing gas (air in the present embodiment), an electric motor 6 for driving the compressor main body 5, and the electric motor 6
- a motor control device 7, a check valve 8 disposed on the discharge side of the compressor body 5, and a pressure sensor 9 disposed on the downstream side of the check valve 8 are provided.
- the pressure sensor 9 detects the pressure of the compressed gas discharged from the compressor main body 5 and outputs a detection signal to the motor control device 7.
- the pressure sensor 9 is used when the gas compressor is operated alone without controlling the number of operating gas compressors, which will be described later, or when a protective function is added to the gas compressor.
- the motor control device 7 has a function (inverter) which drives or stops the electric motor 6 in response to a command from the control device 4 and variably controls the number of rotations of the electric motor 6.
- the gas compressors 1A to 1E can be used as a variable speed gas compressor or a constant speed gas compressor.
- the motor control device 7 records the driving time of the electric motor 6 (in other words, the operating time of the gas compressor) and outputs the recording time to the control device 4.
- the controller 4 controls the number of operating gas compressors so that the pressure detected by the pressure sensor 3 falls within a predetermined range set in advance. Specifically, for example, one of the gas compressors 1A to 1E is operated as a transmission gas compressor, and the rest is operated or stopped as a constant speed gas compressor. Then, the rotational speed of the shift gas compressor is variably controlled such that the pressure detected by the pressure sensor 3 becomes a preset target value. Also, for example, when the rotation speed of the shift gas compressor is maximized and the pressure detected by the pressure sensor 3 is likely to decrease to a preset lower limit (in other words, the usage amount of compressed gas increases) Increase the number of operating constant speed gas compressors. Also, for example, when the rotation speed of the shift gas compressor is minimized and the pressure detected by the pressure sensor 3 is likely to increase to a preset upper limit (in other words, the amount of compressed gas used decreases Decrease the number of gas compressors for constant speed operation.
- control device 4 estimates the total operating time of the gas compressors 1A to 1E at the time of future maintenance, and according to this, the gas to be operated is controlled so that the maintenance cost can be suppressed. It is designed to select a compressor. The functional configuration of such a control device 4 will be described with reference to FIG.
- the control device 4 includes a total operating time estimation unit 10, a storage unit 11, a priority setting unit 12, and an operation number control unit 13.
- the total operating time estimation unit 10 acquires the current operating time (cumulative operating time) of the gas compressors 1A to 1E from the motor control device 7 of the gas compressors 1A to 1E. Then, at the time of the next periodic maintenance (for example, at the start of operation of the compressed gas production system) based on the current operation time of the gas compressors 1A to 1E at the review cycle set in advance (for example, every week). Alternatively, the total operating time of the gas compressors 1A to 1E in one year after the previous regular maintenance) is estimated.
- the storage unit 11 stores, for example, a control table as shown in FIG.
- This control table is a relationship between the total operating time of the gas compressors 1A to 1E and the upper limit value of the operating time of each gas compressor corresponding to the maintenance rank (maintenance standard) of each gas compressor, and the total operating time
- the number of relatively high maintenance rank gas compressors is set to gradually increase (one by one in the present embodiment) as increases.
- the upper limit of the operating time of the gas compressor corresponding to maintenance rank A is 3000 hours
- the upper limit of the operating time corresponding to maintenance rank B is 6000 hours
- maintenance rank B is higher than maintenance rank A .
- the maintenance rank A is applied if the operation time is 3000 hours or less
- the maintenance rank B is applied if the operation time exceeds 3000 hours and not more than 6000 hours.
- the maintenance rank B has more maintenance items (items such as inspection, cleaning, or replacement of parts in detail), and maintenance costs increase.
- the gas compressors 1A to 1E are regarded as the maintenance rank A when the total operating time of the gas compressors 1A to 1E is 15000 hours or less. Further, when the total operating time of the gas compressors 1A to 1E is more than 15,000 hours and not more than 18,000 hours, the gas compressor 1A is regarded as the maintenance rank B, and the gas compressors 1B to 1E are regarded as the maintenance rank A. Further, when the total operating time of the gas compressors 1A to 1E is more than 18,000 hours and not more than 21,000 hours, the gas compressors 1A and 1B are regarded as the maintenance rank B, and the gas compressors 1C to 1E are regarded as the maintenance rank A.
- the gas compressors 1A to 1E are regarded as the maintenance rank B, and the gas compressors 1D and 1E are regarded as the maintenance rank A. Further, when the total operating time of the gas compressors 1A to 1E is more than 24000 hours and not more than 27000 hours, the gas compressors 1A to 1D are regarded as the maintenance rank B, and the gas compressor 1E is regarded as the maintenance rank A.
- the gas compressors 1A to 1E are regarded as the maintenance rank B when the total operating time of the gas compressors 1A to 1E is more than 27,000 hours and not more than 30,000 hours.
- the priority setting unit 12 uses the control table stored in the storage unit 11 and sets each of the gas compressors 1A to 1E according to the total operation time estimated by the total operation time estimation unit 10 in the aforementioned review cycle.
- the upper limit value of the operating time is set, and the priority of each of the gas compressors 1A to 1E is set based on this.
- the priority of the gas compressor with a relatively high upper limit value of the operation time is set to be higher than the priority of the gas compressor with a relatively low upper limit value of the operation time.
- the priority setting unit 12 determines that the total operating time of the gas compressors 1A to 1E estimated by the total operating time estimation unit 10 is 15000 hours or less.
- the upper limit value of the operating time of each of the gas compressors 1A to 1E is set to 3000 hours (maintenance rank A).
- the priorities of the gas compressors 1A to 1E are set to low levels (in other words, they are set to the same level).
- the upper limit value of the operating time of the gas compressor 1A is 6000 hours (maintenance The upper limit value of the operation time of each of the ranks B) and the gas compressors 1B to 1E is set to 3000 hours (maintenance rank A).
- the priority of the gas compressor 1A is set to a high level, and the priorities of the gas compressors 1B to 1E are set to a low level.
- priority setting unit 12 when the total operation time of gas compressors 1A to 1E estimated by total operation time estimation unit 10 is more than 18,000 hours and not more than 21,000 hours, priority setting unit 12 generates gas compressors 1A and 1B, respectively.
- the upper limit value of the operating time is set to 6000 hours (maintenance rank B), and the upper limit value of each operating time of the gas compressors 1C to 1E is set to 3000 hours (maintenance rank A).
- the priority of each of the gas compressors 1A and 1B is set to a high level
- the priority of each of the gas compressors 1C to 1E is set to a low level.
- the upper limit value of each operating time of the gas compressors 1A to 1C is 6000 hours (maintenance rank B)
- gas compression The upper limit value of the operation time of each of the machines 1D and 1E is set to 3000 hours (maintenance rank A).
- the priority of each of the gas compressors 1A to 1C is set to a high level
- the priority of each of the gas compressors 1D and 1E is set to a low level.
- the priority setting unit 12 sets the upper limit value of the operating time of each of the gas compressors 1A to 1D to 6000 hours when the total operating time of the gas compressors 1A to 1E is more than 24000 hours and not more than 27000 hours.
- the maintenance rank B) and the upper limit value of the operating time of the gas compressor 1E are set to 3000 hours (maintenance rank A). At this time, the priority of each of the gas compressors 1A to 1D is set to a high level, and the priority of the gas compressor 1E is set to a low level.
- the upper limit value of each operating time of the gas compressors 1A to 1E is set to 6,000 hours (maintenance rank B).
- the priorities of the gas compressors 1A to 1D are set to high levels (in other words, they are set to the same level).
- the operating number control unit 13 operates the number of operating gas compressors based on the pressure detected by the pressure sensor 3 (specifically, as described above, the pressure detected by the pressure sensor 3 falls within a predetermined range) , And select the gas compressor to be operated based on the priority set by the priority setting unit 12 (details will be described later).
- FIG. 4 is a flowchart showing a processing procedure of the operation number control in the present embodiment.
- step S101 the priority setting unit 12 of the control device 4 initializes the priorities of the gas compressors 1A to 1E and sets them at the same level. Thereafter, the process proceeds to step S102, and the priority setting unit 12 of the control device 4 counts up the timer time. Thereafter, the process proceeds to step S103, and the priority setting unit 12 of the control device 4 determines whether or not the review cycle period (for example, one week) set in advance has elapsed based on the timer time.
- the review cycle period for example, one week
- step S104 the number-of-operations control unit 13 of the control device 4 controls the number of operation of the gas compressors based on the pressure detected by the pressure sensor 3 and also controls the number of gas compressors initialized in step S101. Select a gas compressor to operate based on priority. That is, the gas compressor to be operated is selected so that the operation time of each gas compressor becomes uniform.
- the one with the shortest operating time among the stopped gas compressors is driven.
- the one with the longest operating time among the operating gas compressors is stopped.
- the difference between the operating time of the operating gas compressor and the operating time of the stopped gas compressor is calculated, and when this difference reaches a preset predetermined value, the operating gas compressor is stopped. And the gas compressor at rest is operated.
- step S105 the total operating time estimation unit 10 of the control device 4 calculates the total operating time of the gas compressors 1A to 1E at the time of future maintenance based on the respective operating times of the gas compressors 1A to 1E at present. presume. Thereafter, the process proceeds to steps S106 and S107, and the priority setting unit 12 of the control device 4 uses the control table stored in the storage unit 11 to compress the gas according to the total operating time estimated by the total operating time estimating unit 10.
- the upper limit value of the operating time of each of the machines 1A to 1E is set, and the priority of each of the gas compressors 1A to 1E is set based on this. Thereafter, the process proceeds to step S108, and the priority setting unit 12 of the control device 4 clears the timer time.
- step S104 the operation number control unit 13 of the control device 4 controls the number of operation of the gas compressors based on the pressure detected by the pressure sensor 3, and each gas compressor set in step S107. Select the gas compressor to be operated based on the priority of
- one having a high priority is driven. At this time, if there are a plurality of ones with high priority, the one with the shortest operation time is driven. Also, for example, in the case of reducing the number of operating gas compressors, among the operating gas compressors, one having a lower priority is stopped. At this time, if there are a plurality of low priority ones, the one having the longest operation time is stopped. In addition, if the priority is the same between the operating gas compressor and the stopped gas compressor, the difference between their operating times is calculated, and when the difference reaches a preset predetermined value, the operating time is in operation. Shut down the gas compressor and operate the gas compressor during shutdown.
- a gas compressor to be operated is selected such that the operation times of the gas compressors 1A to 1E are averaged.
- the operation time of each of the gas compressors 1A to 1E is 3000 hours or less. Therefore, all the gas compressors 1A to 1E become the maintenance rank A.
- the total operating time of the gas compressors 1A to 1E at the time of maintenance exceeds 15,000 hours, the operating time of each of the gas compressors 1A to 1E exceeds 3,000 hours. Therefore, all the gas compressors 1A to 1E become the maintenance rank B, and the maintenance cost becomes high.
- the gas compressor 1A becomes the maintenance rank B, and the gas compressors 1A to 1E become the maintenance rank A, and the maintenance cost can be reduced as compared with the first comparative example.
- the gas compressors to be operated are selected such that the operating times of the gas compressors 1A to 1E differ from each other by a preset difference.
- the gas compressors 1A to 1E at the time of maintenance exceeds 15000 hours, the gas compression for which the operating time is more than 3000 hours and not more than 6000 hours due to the difference described above.
- the maintenance cost can be reduced as compared with the first comparative example.
- the operating time of the gas compressors 1A to 1E at the time of maintenance is 15000 hours or less, the operating time is more than 3000 hours and not longer than 6000 hours due to the above difference.
- the maintenance cost is higher than that of the first comparative example.
- the operation time of each of the gas compressors 1A to 1E is Less than 3000 hours. Therefore, all the gas compressors 1A to 1E become the maintenance rank A, and the maintenance cost can be reduced as compared with the second comparative example.
- the maintenance cost can be suppressed corresponding to the total operating time of the gas compressors 1A to 1E.
- the priority setting unit 12 of the control device 4 gives priority to the gas compressor whose upper limit value of the operating time is relatively larger than the priority of the gas compressor whose upper limit value of the operating time is relatively small.
- the priority setting unit 12 of the control device 4 calculates the difference between the upper limit value of the operating time and the current operating time for each of the gas compressors 1A to 1E, and the gas compressor has a relatively small difference.
- the priority of the gas compressor having a relatively large difference may be set higher than the priority of.
- the controller 4 is described as an example separately from the gas compressors 1A to 1E.
- the present invention is not limited to this and does not deviate from the spirit and technical concept of the present invention. Modification is possible within the range. That is, the control device 4 may be integrally provided in any of the gas compressors 1A to 1E, or integrally configured with the motor control device 7 of any of the gas compressors 1A to 1E. It is also good. The same effects as described above can be obtained also in such a modified example.
- control device 4 can input information such as the total number of gas compressors and the upper limit value of operation time corresponding to each maintenance rank, and based on them May have a function of creating a control table. The same effects as described above can be obtained also in such a modified example.
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Abstract
Provided is a compressed gas production device with which it is possible to reduce maintenance cost in correspondence to the total operation time of a plurality of gas compressors. A control device 4 includes a total operation time estimation unit 10 which estimates the total operation time of the gas compressors 1A to 1E at the time of future maintenance. A storage unit 11 stores a control table of the relationship between the total operation time of the gas compressors 1A to 1E and an upper limit value of the operation time of each of the gas compressors corresponding to a maintenance rank of each gas compressor, the control table being set such that as the total operation time increases, the number of gas compressors having relatively high maintenance rank gradually increases. A priority setting unit 12, using the control table, sets the upper limit value of the operation time of each gas compressor in accordance with the total operation time estimated by means of the total operation time estimation unit 10, and, on the basis of this, sets the priority of each gas compressor. An operation number control unit 13 controls the number of gas compressors that are operated, and selects a gas compressor to be operated on the basis of the priority set by means of the priority setting unit 12.
Description
本発明は、複数のガス圧縮機とガス圧縮機の運転台数を制御する制御装置とを備えた圧縮ガス製造装置に関する。
The present invention relates to a compressed gas production apparatus provided with a plurality of gas compressors and a control device for controlling the number of operating gas compressors.
特許文献１は、複数のガス圧縮機（圧縮装置）と、複数のガス圧縮機から吐出された圧縮ガス（圧縮空気）を貯留する貯留槽と、貯留槽内の圧力を検出する圧力センサと、圧力センサで検出された圧力に基づいてガス圧縮機の運転台数を制御する制御装置とを備えた圧縮ガス製造装置（圧縮システム）を開示する。
Patent Document 1 includes a plurality of gas compressors (compressors), a reservoir for storing compressed gas (compressed air) discharged from the plurality of gas compressors, and a pressure sensor for detecting the pressure in the reservoir. Disclosed is a compressed gas manufacturing apparatus (compression system) including a control device that controls the number of operating gas compressors based on the pressure detected by a pressure sensor.
制御装置は、圧力センサで検出された圧力が予め設定された所定の範囲となるように、ガス圧縮機の運転台数を制御する。詳細には、例えば、複数のガス圧縮機のうちの１台を変速用ガス圧縮機として運転させ、残りを定速用ガス圧縮機として運転させるか停止させる。そして、圧力センサで検出された圧力が予め設定された目標値となるように、変速用ガス圧縮機の回転数を可変制御する。また、例えば、変速用ガス圧縮機の回転数が最大となり、且つ圧力センサで検出された圧力が予め設定された下限値まで低くなりそうな場合に（言い換えれば、圧縮ガスの使用量が増加した場合に）、定速用ガス圧縮機の運転台数を増加させる。また、例えば、変速用ガス圧縮機の回転数が最小となり、且つ圧力センサで検出された圧力が予め設定された上限値まで高くなりそうな場合に（言い換えれば、圧縮ガスの使用量が減少した場合に）、定速用ガス圧縮機の運転台数を減少させる。
The control device controls the number of operating gas compressors so that the pressure detected by the pressure sensor falls within a predetermined range set in advance. Specifically, for example, one of the plurality of gas compressors is operated as a transmission gas compressor, and the remaining ones are operated as a constant speed gas compressor or stopped. Then, the rotational speed of the shift gas compressor is variably controlled such that the pressure detected by the pressure sensor becomes a preset target value. Also, for example, when the rotation speed of the shift gas compressor is maximized, and the pressure detected by the pressure sensor is likely to decrease to a preset lower limit (in other words, the amount of compressed gas used increases) Increase the number of gas compressors for constant speed operation. Also, for example, when the rotation speed of the transmission gas compressor is minimized and the pressure detected by the pressure sensor is likely to increase to a preset upper limit (in other words, the amount of compressed gas used decreases) In some cases, reduce the number of gas compressors for constant speed operation.
また、制御装置は、各ガス圧縮機の運転時間（累積運転時間）が平均化するように、運転すべきガス圧縮機を選択する。
In addition, the control device selects a gas compressor to be operated so that the operation time (cumulative operation time) of each gas compressor is averaged.
一般的に、圧縮ガス製造装置を構成する複数のガス圧縮機の整備は、定期的に（例えば１年毎に）且つ互いに同じタイミングで行われており、その整備時における各ガス圧縮機の運転時間に基づいて各ガス圧縮機の整備ランク（整備基準）が決まる。すなわち、整備時におけるガス圧縮機の運転時間が、比較的低い整備ランクに対応する上限値以下であれば、整備ランクが低くなるものの、前述した上限値を超えれば、整備ランクが高くなる。そして、整備ランクが高くなれば、整備項目（詳細には、部品の点検、清掃、又は交換等の項目）が増えて、整備コストも増える。
Generally, maintenance of a plurality of gas compressors constituting a compressed gas production apparatus is performed regularly (for example, every year) and at the same timing with each other, and operation of each gas compressor at the time of the maintenance The maintenance rank (maintenance standard) of each gas compressor is determined based on the time. That is, if the operating time of the gas compressor at the time of maintenance is below the upper limit value corresponding to a relatively low maintenance rank, the maintenance rank will be low, but if it exceeds the above-mentioned upper limit, the maintenance rank will be high. And if a maintenance rank becomes high, a maintenance item (items, such as a part inspection, cleaning, or replacement | exchange in detail) will increase, and a maintenance cost will also increase.
特許文献１に記載の従来技術では、各ガス圧縮機の運転時間を平均化する。そのため、整備時における各ガス圧縮機の運転時間が前述した上限値以下であれば（言い換えれば、整備時における複数のガス圧縮機の総運転時間が所定値（＝前述した運転時間の上限値×ガス圧縮機の総台数）以下であれば）、全てのガス圧縮機の整備ランクが低くなり、整備コストが低くなる。しかし、整備時における各ガス圧縮機の運転時間が前述した上限値を超えれば（言い換えれば、複数のガス圧縮機の総運転時間が前述した所定値を超えれば）、全てのガス圧縮機の整備ランクが高くなり、整備コストが高くなる。
In the prior art described in Patent Document 1, the operation time of each gas compressor is averaged. Therefore, if the operating time of each gas compressor at the time of maintenance is equal to or less than the above-described upper limit (in other words, the total operating time of a plurality of gas compressors at the time of maintenance is a predetermined value (= upper limit of operating time described above x If it is less than the total number of gas compressors), the maintenance rank of all gas compressors will be low, and the maintenance cost will be low. However, if the operating time of each gas compressor at the time of maintenance exceeds the above-described upper limit (in other words, if the total operating time of a plurality of gas compressors exceeds the above-described predetermined value), maintenance of all gas compressors Higher rank and higher maintenance costs.
本発明は、上記事柄に鑑みてなされたものであり、複数のガス圧縮機の総運転時間に対応して整備コストを抑えることを課題の一つとするものである。
This invention is made in view of the said matter, and makes it a subject to suppress maintenance cost corresponding to the total operating time of several gas compressors.
上記課題を解決するために、特許請求の範囲に記載の構成を適用する。本発明は、上記課題を解決するための手段を複数含んでいるが、その一例を挙げるならば、複数のガス圧縮機と、前記ガス圧縮機の運転台数を制御する制御装置とを備えた圧縮ガス製造装置において、前記制御装置は、現在における前記複数のガス圧縮機のそれぞれの運転時間を取得し、これに基づいて将来の整備時における前記複数のガス圧縮機の総運転時間を推定する総運転時間推定部と、前記複数のガス圧縮機の総運転時間と前記複数のガス圧縮機のそれぞれの整備ランクに対応する前記複数のガス圧縮機のそれぞれの運転時間の上限値との関係であって、前記複数のガス圧縮機の総運転時間が増加するのに従って比較的高い整備ランクのガス圧縮機の台数が徐々に増加するように設定された制御テーブルを記憶する記憶部と、前記制御テーブルを用い、前記総運転時間推定部で推定された総運転時間に応じて前記複数のガス圧縮機のそれぞれの運転時間の上限値を設定し、これに基づいて前記複数のガス圧縮機のそれぞれの優先度を設定する優先度設定部と、前記ガス圧縮機の運転台数を制御すると共に、前記優先度設定部で設定された優先度に基づいて運転すべきガス圧縮機を選択する運転台数制御部とを有する。
In order to solve the above-mentioned subject, composition indicated in a claim is applied. The present invention includes a plurality of means for solving the above problems, and an example thereof is a compression comprising a plurality of gas compressors and a control device for controlling the number of operating gas compressors. In the gas manufacturing apparatus, the control device obtains an operation time of each of the plurality of gas compressors at present, and estimates a total operation time of the plurality of gas compressors at the time of future maintenance based thereon A relationship between an operating time estimation unit, a total operating time of the plurality of gas compressors, and an upper limit value of each operating time of the plurality of gas compressors corresponding to a maintenance rank of each of the plurality of gas compressors. A storage unit for storing a control table set to gradually increase the number of gas compressors of relatively high maintenance rank as the total operating time of the plurality of gas compressors increases; The upper limit value of the operation time of each of the plurality of gas compressors is set according to the total operation time estimated by the total operation time estimation unit using a table, and based on this, each of the plurality of gas compressors Control unit that controls the number of operating gas compressors, and selects the number of operating gas compressors to be operated based on the priority set by the priority setting unit. Have a part.
本発明によれば、複数のガス圧縮機の総運転時間に対応して整備コストを抑えることができる。
According to the present invention, maintenance costs can be reduced corresponding to the total operating time of a plurality of gas compressors.
なお、上記以外の課題、構成及び効果は、以下の説明により明らかにされる。
In addition, the subject except the above, a structure, and an effect are clarified by the following description.
以下、本発明の一実施形態を、図面を参照しつつ説明する。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
図１は、本実施形態における圧縮ガス製造装置の構成を表す概略図である。なお、この図１において、実線の矢印は圧縮ガス（本実施形態では圧縮空気）の流れを示し、破線の矢印は電気信号の流れを示している。
FIG. 1 is a schematic view showing a configuration of a compressed gas production apparatus in the present embodiment. In FIG. 1, solid arrows indicate the flow of compressed gas (compressed air in the present embodiment), and broken arrows indicate the flow of electrical signals.
本実施形態の圧縮ガス製造装置は、５台のガス圧縮機（圧縮機ユニット）１Ａ，１Ｂ，１Ｃ，１Ｄ，１Ｅと、ガス圧縮機１Ａ，１Ｂ，１Ｃ，１Ｄ，１Ｅから吐出された圧縮ガスを貯留する貯留槽２とを備えており、貯留槽２内の圧縮ガスが圧縮ガス使用ラインへ供給されるようになっている。また、圧縮ガス製造装置は、貯留槽２内の圧力を検出する圧力センサ３と、圧力センサ３で検出された圧力に基づいてガス圧縮機の運転台数を制御する制御装置４とを備えている。制御装置４は、プログラムに基づいて演算処理や制御処理を実行する演算制御部（例えばＣＰＵ）と、プログラムや演算処理の結果を記憶する記憶部（例えばＲＯＭ、ＲＡＭ）等を有するものである。
The compressed gas production apparatus according to the present embodiment includes compressed gas discharged from five gas compressors (compressor units) 1A, 1B, 1C, 1D, 1E and gas compressors 1A, 1B, 1C, 1D, 1E. And the storage tank 2 for storing the compressed gas in the storage tank 2 is supplied to the compressed gas use line. In addition, the compressed gas production device includes a pressure sensor 3 that detects the pressure in the storage tank 2 and a control device 4 that controls the number of operating gas compressors based on the pressure detected by the pressure sensor 3. . The control device 4 includes an arithmetic control unit (for example, a CPU) that executes arithmetic processing and control processing based on a program, and a storage unit (for example, a ROM and a RAM) that stores the program and the result of the arithmetic processing.
ガス圧縮機（圧縮機ユニット）１Ａ～１Ｅの各々は、ガス（本実施形態では空気）を圧縮する圧縮機本体５と、圧縮機本体５を駆動する電動モータ６と、電動モータ６を制御するモータ制御装置７と、圧縮機本体５の吐出側に配置された逆止弁８と、逆止弁８の下流側に配置された圧力センサ９とを備えている。圧力センサ９は、圧縮機本体５から吐出された圧縮ガスの圧力を検出し、その検出信号をモータ制御装置７へ出力するようになっている。なお、圧力センサ９は、後述するガス圧縮機の運転台数制御を行わずにガス圧縮機を単独で運転させる場合や、ガス圧縮機に保護機能を付加する場合等に用いるものである。
Each of the gas compressors (compressor units) 1A to 1E controls a compressor main body 5 for compressing gas (air in the present embodiment), an electric motor 6 for driving the compressor main body 5, and the electric motor 6 A motor control device 7, a check valve 8 disposed on the discharge side of the compressor body 5, and a pressure sensor 9 disposed on the downstream side of the check valve 8 are provided. The pressure sensor 9 detects the pressure of the compressed gas discharged from the compressor main body 5 and outputs a detection signal to the motor control device 7. The pressure sensor 9 is used when the gas compressor is operated alone without controlling the number of operating gas compressors, which will be described later, or when a protective function is added to the gas compressor.
モータ制御装置７は、制御装置４からの指令に応じて、電動モータ６を駆動又は停止すると共に、電動モータ６の回転数を可変制御する機能（インバータ）を有している。これにより、ガス圧縮機１Ａ～１Ｅは、変速用ガス圧縮機又は定速用ガス圧縮機として用いることが可能である。また、モータ制御装置７は、電動モータ６の駆動時間（言い換えれば、ガス圧縮機の運転時間）を記録すると共に制御装置４へ出力するようになっている。
The motor control device 7 has a function (inverter) which drives or stops the electric motor 6 in response to a command from the control device 4 and variably controls the number of rotations of the electric motor 6. Thus, the gas compressors 1A to 1E can be used as a variable speed gas compressor or a constant speed gas compressor. Further, the motor control device 7 records the driving time of the electric motor 6 (in other words, the operating time of the gas compressor) and outputs the recording time to the control device 4.
制御装置４は、圧力センサ３で検出された圧力が予め設定された所定の範囲となるように、ガス圧縮機の運転台数を制御する。詳細には、例えば、ガス圧縮機１Ａ～１Ｅのうちの１台を変速用ガス圧縮機として運転させ、残りを定速用ガス圧縮機として運転させるか停止させる。そして、圧力センサ３で検出された圧力が予め設定された目標値となるように、変速用ガス圧縮機の回転数を可変制御する。また、例えば、変速用ガス圧縮機の回転数が最大となり、且つ圧力センサ３で検出された圧力が予め設定された下限値まで低くなりそうな場合に（言い換えれば、圧縮ガスの使用量が増加した場合に）、定速用ガス圧縮機の運転台数を増加させる。また、例えば、変速用ガス圧縮機の回転数が最小となり、且つ圧力センサ３で検出された圧力が予め設定された上限値まで高くなりそうな場合に（言い換えれば、圧縮ガスの使用量が減少した場合に）、定速用ガス圧縮機の運転台数を減少させる。
The controller 4 controls the number of operating gas compressors so that the pressure detected by the pressure sensor 3 falls within a predetermined range set in advance. Specifically, for example, one of the gas compressors 1A to 1E is operated as a transmission gas compressor, and the rest is operated or stopped as a constant speed gas compressor. Then, the rotational speed of the shift gas compressor is variably controlled such that the pressure detected by the pressure sensor 3 becomes a preset target value. Also, for example, when the rotation speed of the shift gas compressor is maximized and the pressure detected by the pressure sensor 3 is likely to decrease to a preset lower limit (in other words, the usage amount of compressed gas increases) Increase the number of operating constant speed gas compressors. Also, for example, when the rotation speed of the shift gas compressor is minimized and the pressure detected by the pressure sensor 3 is likely to increase to a preset upper limit (in other words, the amount of compressed gas used decreases Decrease the number of gas compressors for constant speed operation.
また、本実施形態の大きな特徴として、制御装置４は、将来の整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間を推定し、これに準じて整備コストが抑えられるように、運転すべきガス圧縮機を選択するようになっている。このような制御装置４の機能的構成を、図２を用いて説明する。
Further, as a major feature of the present embodiment, the control device 4 estimates the total operating time of the gas compressors 1A to 1E at the time of future maintenance, and according to this, the gas to be operated is controlled so that the maintenance cost can be suppressed. It is designed to select a compressor. The functional configuration of such a control device 4 will be described with reference to FIG.
制御装置４は、総運転時間推定部１０、記憶部１１、優先度設定部１２、及び運転台数制御部１３を有している。
The control device 4 includes a total operating time estimation unit 10, a storage unit 11, a priority setting unit 12, and an operation number control unit 13.
総運転時間推定部１０は、ガス圧縮機１Ａ～１Ｅのモータ制御装置７から、現在におけるガス圧縮機１Ａ～１Ｅのそれぞれの運転時間（累積運転時間）を取得する。そして、予め設定された見直し周期にて（例えば１週間毎に）、現在におけるガス圧縮機１Ａ～１Ｅのそれぞれの運転時間に基づいて、次回の定期整備時（例えば圧縮ガス製造装置の稼働開始時又は前回の定期整備時から１年後）におけるガス圧縮機１Ａ～１Ｅの総運転時間を推定するようになっている。
The total operating time estimation unit 10 acquires the current operating time (cumulative operating time) of the gas compressors 1A to 1E from the motor control device 7 of the gas compressors 1A to 1E. Then, at the time of the next periodic maintenance (for example, at the start of operation of the compressed gas production system) based on the current operation time of the gas compressors 1A to 1E at the review cycle set in advance (for example, every week). Alternatively, the total operating time of the gas compressors 1A to 1E in one year after the previous regular maintenance) is estimated.
その推定方法の具体例を説明すると、まず、圧縮ガス製造装置の稼働開始時から現在までの期間をＴｃとすれば、その期間Ｔｃにおけるガス圧縮機１Ａ～１Ｅの総運転時間Ｒｔｃを演算する。そして、直近の見直し周期期間をＴｒとすれば、その期間Ｔｒにおけるガス圧縮機１Ａ～１Ｅの総運転時間Ｒｔｒを演算する。そして、現在から次回の定期整備時までの期間をＴｍとすれば、その期間Ｔｍにおけるガス圧縮機１Ａ～１Ｅの総運転時間Ｒｔｍ（＝Ｒｔｒ×Ｔｍ／Ｔｒ）を演算する。そして、次回の定期整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間Ｒｔ（＝Ｒｔｃ＋Ｒｔｍ）を演算する。
A specific example of the estimation method will be described. First, assuming that the period from the start of operation of the compressed gas manufacturing apparatus to the present time is Tc, the total operation time Rtc of the gas compressors 1A to 1E in that period Tc is calculated. Then, if the latest review cycle period is Tr, the total operating time Rtr of the gas compressors 1A to 1E in that period Tr is calculated. Then, assuming that the period from the present to the next regular maintenance is Tm, the total operating time Rtm (= Rtr × Tm / Tr) of the gas compressors 1A to 1E in that period Tm is calculated. Then, the total operating time Rt (= Rtc + Rtm) of the gas compressors 1A to 1E at the next regular maintenance is calculated.
記憶部１１は、例えば図３で示すような制御テーブルを記憶している。この制御テーブルは、ガス圧縮機１Ａ～１Ｅの総運転時間と各ガス圧縮機の整備ランク（整備基準）に対応する各ガス圧縮機の運転時間の上限値との関係であって、総運転時間が増加するのに従って比較的高い整備ランクのガス圧縮機の台数が徐々に（本実施形態では、１台ずつ）増加するように設定されている。
The storage unit 11 stores, for example, a control table as shown in FIG. This control table is a relationship between the total operating time of the gas compressors 1A to 1E and the upper limit value of the operating time of each gas compressor corresponding to the maintenance rank (maintenance standard) of each gas compressor, and the total operating time The number of relatively high maintenance rank gas compressors is set to gradually increase (one by one in the present embodiment) as increases.
整備ランクＡに対応するガス圧縮機の運転時間の上限値が３０００時間であり、整備ランクＢに対応する運転時間の上限値が６０００時間であり、整備ランクＡより整備ランクＢが高くなっている。各ガス圧縮機は、その運転時間が３０００時間以下であれば整備ランクＡが適用され、その運転時間が３０００時間を超え且つ６０００時間以下であれば、整備ランクＢが適用される。整備ランクＢは、整備ランクＡと比べ、整備項目（詳細には、部品の点検、清掃、又は交換等の項目）が増え、整備コストが増加する。
The upper limit of the operating time of the gas compressor corresponding to maintenance rank A is 3000 hours, the upper limit of the operating time corresponding to maintenance rank B is 6000 hours, and maintenance rank B is higher than maintenance rank A . For each gas compressor, the maintenance rank A is applied if the operation time is 3000 hours or less, and the maintenance rank B is applied if the operation time exceeds 3000 hours and not more than 6000 hours. Compared to the maintenance rank A, the maintenance rank B has more maintenance items (items such as inspection, cleaning, or replacement of parts in detail), and maintenance costs increase.
図３で示す制御テーブルでは、ガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間以下であるときに、ガス圧縮機１Ａ～１Ｅを整備ランクＡとしている。また、ガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間を超え１８０００時間以下であるときに、ガス圧縮機１Ａを整備ランクＢとし、ガス圧縮機１Ｂ～１Ｅを整備ランクＡとしている。また、ガス圧縮機１Ａ～１Ｅの総運転時間が１８０００時間を超え２１０００時間以下であるときに、ガス圧縮機１Ａ，１Ｂを整備ランクＢとし、ガス圧縮機１Ｃ～１Ｅを整備ランクＡとしている。
In the control table shown in FIG. 3, the gas compressors 1A to 1E are regarded as the maintenance rank A when the total operating time of the gas compressors 1A to 1E is 15000 hours or less. Further, when the total operating time of the gas compressors 1A to 1E is more than 15,000 hours and not more than 18,000 hours, the gas compressor 1A is regarded as the maintenance rank B, and the gas compressors 1B to 1E are regarded as the maintenance rank A. Further, when the total operating time of the gas compressors 1A to 1E is more than 18,000 hours and not more than 21,000 hours, the gas compressors 1A and 1B are regarded as the maintenance rank B, and the gas compressors 1C to 1E are regarded as the maintenance rank A.
また、ガス圧縮機１Ａ～１Ｅの総運転時間が２１０００時間を超え２４０００時間以下であるときに、ガス圧縮機１Ａ～１Ｃを整備ランクＢとし、ガス圧縮機１Ｄ，１Ｅを整備ランクＡとしている。また、ガス圧縮機１Ａ～１Ｅの総運転時間が２４０００時間を超え２７０００時間以下であるときに、ガス圧縮機１Ａ～１Ｄを整備ランクＢとし、ガス圧縮機１Ｅを整備ランクＡとしている。ガス圧縮機１Ａ～１Ｅの総運転時間が２７０００時間を超え３００００時間以下であるときに、ガス圧縮機１Ａ～１Ｅを整備ランクＢとしている。
Further, when the total operating time of the gas compressors 1A to 1E is more than 21,000 hours and not more than 24000 hours, the gas compressors 1A to 1C are regarded as the maintenance rank B, and the gas compressors 1D and 1E are regarded as the maintenance rank A. Further, when the total operating time of the gas compressors 1A to 1E is more than 24000 hours and not more than 27000 hours, the gas compressors 1A to 1D are regarded as the maintenance rank B, and the gas compressor 1E is regarded as the maintenance rank A. The gas compressors 1A to 1E are regarded as the maintenance rank B when the total operating time of the gas compressors 1A to 1E is more than 27,000 hours and not more than 30,000 hours.
優先度設定部１２は、記憶部１１で記憶された制御テーブルを用い、前述した見直し周期にて、総運転時間推定部１０で推定された総運転時間に応じてガス圧縮機１Ａ～１Ｅのそれぞれの運転時間の上限値を設定し、これに基づいてガス圧縮機１Ａ～１Ｅのそれぞれの優先度を設定する。詳細には、運転時間の上限値が比較的小さいガス圧縮機の優先度より、運転時間の上限値が比較的大きいガス圧縮機の優先度を高く設定するようになっている。
The priority setting unit 12 uses the control table stored in the storage unit 11 and sets each of the gas compressors 1A to 1E according to the total operation time estimated by the total operation time estimation unit 10 in the aforementioned review cycle. The upper limit value of the operating time is set, and the priority of each of the gas compressors 1A to 1E is set based on this. In detail, the priority of the gas compressor with a relatively high upper limit value of the operation time is set to be higher than the priority of the gas compressor with a relatively low upper limit value of the operation time.
図３で示す制御テーブルを用いた場合を説明すると、優先度設定部１２は、総運転時間推定部１０で推定されたガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間以下であるときに、ガス圧縮機１Ａ～１Ｅのそれぞれの運転時間の上限値を３０００時間（整備ランクＡ）に設定する。このとき、ガス圧縮機１Ａ～１Ｅのそれぞれの優先度を低レベルに設定する（言い換えれば、互いに同じレベルに設定する）。また、総運転時間推定部１０で推定されたガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間を超え１８０００時間以下であるときに、ガス圧縮機１Ａの運転時間の上限値を６０００時間（整備ランクＢ）、ガス圧縮機１Ｂ～１Ｅのそれぞれの運転時間の上限値を３０００時間（整備ランクＡ）に設定する。このとき、ガス圧縮機１Ａの優先度を高レベル、ガス圧縮機１Ｂ～１Ｅのそれぞれの優先度を低レベルに設定する。
When the control table shown in FIG. 3 is used, the priority setting unit 12 determines that the total operating time of the gas compressors 1A to 1E estimated by the total operating time estimation unit 10 is 15000 hours or less. The upper limit value of the operating time of each of the gas compressors 1A to 1E is set to 3000 hours (maintenance rank A). At this time, the priorities of the gas compressors 1A to 1E are set to low levels (in other words, they are set to the same level). In addition, when the total operating time of the gas compressors 1A to 1E estimated by the total operating time estimation unit 10 is more than 15000 hours and 18000 hours or less, the upper limit value of the operating time of the gas compressor 1A is 6000 hours (maintenance The upper limit value of the operation time of each of the ranks B) and the gas compressors 1B to 1E is set to 3000 hours (maintenance rank A). At this time, the priority of the gas compressor 1A is set to a high level, and the priorities of the gas compressors 1B to 1E are set to a low level.
また、優先度設定部１２は、総運転時間推定部１０で推定されたガス圧縮機１Ａ～１Ｅの総運転時間が１８０００時間を超え２１０００時間以下であるときに、ガス圧縮機１Ａ，１Ｂのそれぞれの運転時間の上限値を６０００時間（整備ランクＢ）、ガス圧縮機１Ｃ～１Ｅのそれぞれの運転時間の上限値を３０００時間（整備ランクＡ）に設定する。このとき、ガス圧縮機１Ａ，１Ｂのそれぞれの優先度を高レベル、ガス圧縮機１Ｃ～１Ｅのそれぞれの優先度を低レベルに設定する。また、ガス圧縮機１Ａ～１Ｅの総運転時間が２１０００時間を超え２４０００時間以下であるときに、ガス圧縮機１Ａ～１Ｃのそれぞれの運転時間の上限値を６０００時間（整備ランクＢ）、ガス圧縮機１Ｄ，１Ｅのそれぞれの運転時間の上限値を３０００時間（整備ランクＡ）に設定する。このとき、ガス圧縮機１Ａ～１Ｃのそれぞれの優先度を高レベル、ガス圧縮機１Ｄ，１Ｅのそれぞれの優先度を低レベルに設定する。
Further, when the total operation time of gas compressors 1A to 1E estimated by total operation time estimation unit 10 is more than 18,000 hours and not more than 21,000 hours, priority setting unit 12 generates gas compressors 1A and 1B, respectively. The upper limit value of the operating time is set to 6000 hours (maintenance rank B), and the upper limit value of each operating time of the gas compressors 1C to 1E is set to 3000 hours (maintenance rank A). At this time, the priority of each of the gas compressors 1A and 1B is set to a high level, and the priority of each of the gas compressors 1C to 1E is set to a low level. In addition, when the total operating time of the gas compressors 1A to 1E is more than 21,000 hours and not more than 24000 hours, the upper limit value of each operating time of the gas compressors 1A to 1C is 6000 hours (maintenance rank B), gas compression The upper limit value of the operation time of each of the machines 1D and 1E is set to 3000 hours (maintenance rank A). At this time, the priority of each of the gas compressors 1A to 1C is set to a high level, and the priority of each of the gas compressors 1D and 1E is set to a low level.
また、優先度設定部１２は、ガス圧縮機１Ａ～１Ｅの総運転時間が２４０００時間を超え２７０００時間以下であるときに、ガス圧縮機１Ａ～１Ｄのそれぞれの運転時間の上限値を６０００時間（整備ランクＢ）、ガス圧縮機１Ｅの運転時間の上限値を３０００時間（整備ランクＡ）に設定する。このとき、ガス圧縮機１Ａ～１Ｄのそれぞれの優先度を高レベル、ガス圧縮機１Ｅの優先度を低レベルに設定する。ガス圧縮機１Ａ～１Ｅの総運転時間が２７０００時間を超え３００００時間以下であるときに、ガス圧縮機１Ａ～１Ｅのそれぞれの運転時間の上限値を６０００時間（整備ランクＢ）に設定する。このとき、ガス圧縮機１Ａ～１Ｄのそれぞれの優先度を高レベルに設定する（言い換えれば、互いに同じレベルに設定する）。
The priority setting unit 12 sets the upper limit value of the operating time of each of the gas compressors 1A to 1D to 6000 hours when the total operating time of the gas compressors 1A to 1E is more than 24000 hours and not more than 27000 hours. The maintenance rank B) and the upper limit value of the operating time of the gas compressor 1E are set to 3000 hours (maintenance rank A). At this time, the priority of each of the gas compressors 1A to 1D is set to a high level, and the priority of the gas compressor 1E is set to a low level. When the total operating time of the gas compressors 1A to 1E is more than 27,000 hours and not more than 30,000 hours, the upper limit value of each operating time of the gas compressors 1A to 1E is set to 6,000 hours (maintenance rank B). At this time, the priorities of the gas compressors 1A to 1D are set to high levels (in other words, they are set to the same level).
運転台数制御部１３は、圧力センサ３で検出された圧力に基づいて（詳細には、上述したように圧力センサ３で検出された圧力が所定の範囲となるように）ガス圧縮機の運転台数を制御すると共に、優先度設定部１２で設定された優先度に基づいて運転すべきガス圧縮機を選択するようになっている（詳細は後述）。
The operating number control unit 13 operates the number of operating gas compressors based on the pressure detected by the pressure sensor 3 (specifically, as described above, the pressure detected by the pressure sensor 3 falls within a predetermined range) , And select the gas compressor to be operated based on the priority set by the priority setting unit 12 (details will be described later).
次に、本実施形態における運転台数制御の処理手順を説明する。図４は、本実施形態における運転台数制御の処理手順を表すフローチャートである。
Next, the processing procedure of the operation number control in this embodiment will be described. FIG. 4 is a flowchart showing a processing procedure of the operation number control in the present embodiment.
圧縮ガス製造装置の稼働開始後、ステップＳ１０１にて、制御装置４の優先度設定部１２は、ガス圧縮機１Ａ～１Ｅのそれぞれの優先度を初期化して互いに同じレベルに設定する。その後、ステップＳ１０２に進み、制御装置４の優先度設定部１２は、タイマ時間をカウントアップする。その後、ステップＳ１０３に進み、制御装置４の優先度設定部１２は、タイマ時間により、予め設定された見直し周期期間（例えば１週間）が経過したか否かを判定する。
After the compressed gas production apparatus starts operating, in step S101, the priority setting unit 12 of the control device 4 initializes the priorities of the gas compressors 1A to 1E and sets them at the same level. Thereafter, the process proceeds to step S102, and the priority setting unit 12 of the control device 4 counts up the timer time. Thereafter, the process proceeds to step S103, and the priority setting unit 12 of the control device 4 determines whether or not the review cycle period (for example, one week) set in advance has elapsed based on the timer time.
最初のうちは、見直し周期期間が経過していないため、ステップＳ１０３の判定がＮＯとなって、ステップＳ１０４に移る。ステップ１０４にて、制御装置４の運転台数制御部１３は、圧力センサ３で検出された圧力に基づいてガス圧縮機の運転台数を制御すると共に、ステップＳ１０１で初期化された各ガス圧縮機の優先度に基づいて運転すべきガス圧縮機を選択する。すなわち、各ガス圧縮機の運転時間が均一化するように、運転すべきガス圧縮機を選択する。
At the beginning, since the review cycle period has not elapsed, the determination in step S103 is NO, and the process moves to step S104. In step 104, the number-of-operations control unit 13 of the control device 4 controls the number of operation of the gas compressors based on the pressure detected by the pressure sensor 3 and also controls the number of gas compressors initialized in step S101. Select a gas compressor to operate based on priority. That is, the gas compressor to be operated is selected so that the operation time of each gas compressor becomes uniform.
具体的には、例えばガス圧縮機の運転台数を増加させる場合、停止中のガス圧縮機のなかで運転時間が最も短いものを駆動させる。また、例えばガス圧縮機の運転台数を減少させる場合、運転中のガス圧縮機のなかで運転時間が最も長いものを停止させる。また、運転中のガス圧縮機の運転時間と停止中のガス圧縮機の運転時間との差分を演算し、この差分が予め設定された所定値に達した場合、運転中のガス圧縮機を停止させ、停止中のガス圧縮機を運転させる。
Specifically, for example, in the case where the number of operating gas compressors is increased, the one with the shortest operating time among the stopped gas compressors is driven. Also, for example, in the case of reducing the number of operating gas compressors, the one with the longest operating time among the operating gas compressors is stopped. In addition, the difference between the operating time of the operating gas compressor and the operating time of the stopped gas compressor is calculated, and when this difference reaches a preset predetermined value, the operating gas compressor is stopped. And the gas compressor at rest is operated.
見直し周期期間が経過するまで、上述のステップＳ１０２及びＳ１０４を繰り返す。そして、見直し周期期間が経過すると、ステップＳ１０３の判定がＹＥＳとなって、ステップＳ１０５に移る。ステップＳ１０５にて、制御装置４の総運転時間推定部１０は、現在におけるガス圧縮機１Ａ～１Ｅのそれぞれの運転時間に基づいて、将来の整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間を推定する。その後、ステップＳ１０６及びＳ１０７に進み、制御装置４の優先度設定部１２は、記憶部１１で記憶された制御テーブルを用い、総運転時間推定部１０で推定された総運転時間に応じてガス圧縮機１Ａ～１Ｅのそれぞれの運転時間の上限値を設定し、これに基づいてガス圧縮機１Ａ～１Ｅのそれぞれの優先度を設定する。その後、ステップＳ１０８に進み、制御装置４の優先度設定部１２は、タイマ時間をクリアする。
The above-described steps S102 and S104 are repeated until the review cycle period has elapsed. Then, when the review cycle period has elapsed, the determination in step S103 becomes YES, and the process moves to step S105. In step S105, the total operating time estimation unit 10 of the control device 4 calculates the total operating time of the gas compressors 1A to 1E at the time of future maintenance based on the respective operating times of the gas compressors 1A to 1E at present. presume. Thereafter, the process proceeds to steps S106 and S107, and the priority setting unit 12 of the control device 4 uses the control table stored in the storage unit 11 to compress the gas according to the total operating time estimated by the total operating time estimating unit 10. The upper limit value of the operating time of each of the machines 1A to 1E is set, and the priority of each of the gas compressors 1A to 1E is set based on this. Thereafter, the process proceeds to step S108, and the priority setting unit 12 of the control device 4 clears the timer time.
その後、ステップＳ１０４に進み、制御装置４の運転台数制御部１３は、圧力センサ３で検出された圧力に基づいてガス圧縮機の運転台数を制御すると共に、ステップＳ１０７で設定された各ガス圧縮機の優先度に基づいて運転すべきガス圧縮機を選択する。
Thereafter, the process proceeds to step S104, and the operation number control unit 13 of the control device 4 controls the number of operation of the gas compressors based on the pressure detected by the pressure sensor 3, and each gas compressor set in step S107. Select the gas compressor to be operated based on the priority of
具体的には、例えばガス圧縮機の運転台数を増加させる場合、停止中のガス圧縮機のなかで優先度が高いものを駆動させる。このとき、優先度が高いものが複数あれば、運転時間が最も短いものを駆動させる。また、例えばガス圧縮機の運転台数を減少させる場合、運転中のガス圧縮機のなかで優先度が低いものを停止させる。このとき、優先度が低いものが複数あれば、運転時間が最も長いものを停止させる。また、運転中のガス圧縮機と停止中のガス圧縮機において優先度が同じであれば、それらの運転時間の差分を演算し、この差分が予め設定された所定値に達した場合、運転中のガス圧縮機を停止させ、停止中のガス圧縮機を運転させる。
Specifically, for example, in the case of increasing the number of operating gas compressors, among the gas compressors which are stopped, one having a high priority is driven. At this time, if there are a plurality of ones with high priority, the one with the shortest operation time is driven. Also, for example, in the case of reducing the number of operating gas compressors, among the operating gas compressors, one having a lower priority is stopped. At this time, if there are a plurality of low priority ones, the one having the longest operation time is stopped. In addition, if the priority is the same between the operating gas compressor and the stopped gas compressor, the difference between their operating times is calculated, and when the difference reaches a preset predetermined value, the operating time is in operation. Shut down the gas compressor and operate the gas compressor during shutdown.
次に、本実施形態の作用効果を、比較例を用いて説明する。
Next, the operation and effect of the present embodiment will be described using a comparative example.
第１の比較例として、ガス圧縮機１Ａ～１Ｅのそれぞれの運転時間が平均化するように、運転すべきガス圧縮機を選択する場合を仮想する。第１の比較例では、整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間以下であれば、ガス圧縮機１Ａ～１Ｅのそれぞれの運転時間が３０００時間以下となる。そのため、全てのガス圧縮機１Ａ～１Ｅが整備ランクＡとなる。しかし、整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間を少しでも超えれば、ガス圧縮機１Ａ～１Ｅのそれぞれの運転時間が３０００時間を超える。そのため、全てのガス圧縮機１Ａ～１Ｅが整備ランクＢとなり、整備コストが高くなる。
As a first comparative example, it is assumed that a gas compressor to be operated is selected such that the operation times of the gas compressors 1A to 1E are averaged. In the first comparative example, when the total operation time of the gas compressors 1A to 1E at the time of maintenance is 15000 hours or less, the operation time of each of the gas compressors 1A to 1E is 3000 hours or less. Therefore, all the gas compressors 1A to 1E become the maintenance rank A. However, if the total operating time of the gas compressors 1A to 1E at the time of maintenance exceeds 15,000 hours, the operating time of each of the gas compressors 1A to 1E exceeds 3,000 hours. Therefore, all the gas compressors 1A to 1E become the maintenance rank B, and the maintenance cost becomes high.
これに対し、本実施形態では、例えば整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間を超えて１８０００時間未満であれば、ガス圧縮機１Ａの運転時間が３０００時間を超えて６０００時間以下、ガス圧縮機１Ｂ～１Ｅのそれぞれの運転時間が３０００時間以下となる。そのため、ガス圧縮機１Ａが整備ランクＢ、ガス圧縮機１Ａ～１Ｅが整備ランクＡとなり、第１の比較例と比べ、整備コストを軽減することができる。
On the other hand, in the present embodiment, for example, if the total operating time of the gas compressors 1A to 1E during maintenance exceeds 15000 hours and is less than 18000 hours, the operating time of the gas compressor 1A exceeds 3000 hours to 6000 The operating time of each of the gas compressors 1B to 1E is 3000 hours or less. Therefore, the gas compressor 1A becomes the maintenance rank B, and the gas compressors 1A to 1E become the maintenance rank A, and the maintenance cost can be reduced as compared with the first comparative example.
第２の比較例として、ガス圧縮機１Ａ～１Ｅのそれぞれの運転時間が予め設定された差分だけ互いに異なるように、運転すべきガス圧縮機を選択する場合を仮想する。第２の比較例では、整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間を超えたときに、前述した差分のため、運転時間が３０００時間を超えて６０００時間以下であるガス圧縮機と、運転時間が３０００時間以下であるガス圧縮機とが存在する場合がある。この場合、整備ランクＢとなるガス圧縮機と、整備ランクＡとなるガス圧縮機とが存在するので、第１の比較例と比べ、整備コストを軽減することができる。しかし、整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間以下であるときも、前述した差分のため、運転時間が３０００時間を超えて６０００時間以下であるガス圧縮機と、運転時間が３０００時間以下であるガス圧縮機とが存在する場合がある。この場合、整備ランクＢとなるガス圧縮機と、整備ランクＡとなるガス圧縮機とが存在するので、第１の比較例と比べ、整備コストが高くなる。
As a second comparative example, it is assumed that the gas compressors to be operated are selected such that the operating times of the gas compressors 1A to 1E differ from each other by a preset difference. In the second comparative example, when the total operating time of the gas compressors 1A to 1E at the time of maintenance exceeds 15000 hours, the gas compression for which the operating time is more than 3000 hours and not more than 6000 hours due to the difference described above. There may be a machine and a gas compressor whose operating time is less than 3000 hours. In this case, since there is a gas compressor of the maintenance rank B and a gas compressor of the maintenance rank A, the maintenance cost can be reduced as compared with the first comparative example. However, even when the total operating time of the gas compressors 1A to 1E at the time of maintenance is 15000 hours or less, the operating time is more than 3000 hours and not longer than 6000 hours due to the above difference. There may be a gas compressor having a time of 3000 hours or less. In this case, since there is a gas compressor of the maintenance rank B and a gas compressor of the maintenance rank A, the maintenance cost is higher than that of the first comparative example.
これに対し、本実施形態では、第１の比較例と同様、整備時におけるガス圧縮機１Ａ～１Ｅの総運転時間が１５０００時間以下であれば、ガス圧縮機１Ａ～１Ｅのそれぞれの運転時間が３０００時間以下となる。そのため、全てのガス圧縮機１Ａ～１Ｅが整備ランクＡとなり、第２の比較例と比べ、整備コストを軽減することができる。
On the other hand, in the present embodiment, as in the first comparative example, when the total operation time of the gas compressors 1A to 1E at the time of maintenance is 15000 hours or less, the operation time of each of the gas compressors 1A to 1E is Less than 3000 hours. Therefore, all the gas compressors 1A to 1E become the maintenance rank A, and the maintenance cost can be reduced as compared with the second comparative example.
したがって、本実施形態においては、ガス圧縮機１Ａ～１Ｅの総運転時間に対応して整備コストを抑えることができる。
Therefore, in the present embodiment, the maintenance cost can be suppressed corresponding to the total operating time of the gas compressors 1A to 1E.
なお、上記一実施形態において、制御装置４の優先度設定部１２は、運転時間の上限値が比較的小さいガス圧縮機の優先度より、運転時間の上限値が比較的大きいガス圧縮機の優先度を高く設定する場合を例にとって説明したが、これに限られず、本発明の趣旨及び技術思想を逸脱しない範囲内で変形が可能である。すなわち、制御装置４の優先度設定部１２は、例えば、ガス圧縮機１Ａ～１Ｅのそれぞれに対し運転時間の上限値と現在の運転時間との差分を演算し、差分が比較的小さいガス圧縮機の優先度より、差分が比較的大きいガス圧縮機の優先度を高く設定してもよい。このような変形例においても、上記同様の効果を得ることができる。
In the above-described embodiment, the priority setting unit 12 of the control device 4 gives priority to the gas compressor whose upper limit value of the operating time is relatively larger than the priority of the gas compressor whose upper limit value of the operating time is relatively small. Although the case where the degree is set high is described as an example, the invention is not limited to this, and modifications can be made without departing from the spirit and technical concept of the present invention. That is, for example, the priority setting unit 12 of the control device 4 calculates the difference between the upper limit value of the operating time and the current operating time for each of the gas compressors 1A to 1E, and the gas compressor has a relatively small difference. The priority of the gas compressor having a relatively large difference may be set higher than the priority of. The same effects as described above can be obtained also in such a modified example.
また、上記一実施形態において、制御装置４は、ガス圧縮機１Ａ～１Ｅとは別体として備えられた場合を例にとって説明したが、これに限られず、本発明の趣旨及び技術思想を逸脱しない範囲内で変形が可能である。すなわち、制御装置４は、ガス圧縮機１Ａ～１Ｅのうちのいずれかに一体として備えられてもよいし、ガス圧縮機１Ａ～１Ｅのうちのいずれかのモータ制御装置７と一体として構成されてもよい。このような変形例においても、上記同様の効果を得ることができる。
In the above embodiment, the controller 4 is described as an example separately from the gas compressors 1A to 1E. However, the present invention is not limited to this and does not deviate from the spirit and technical concept of the present invention. Modification is possible within the range. That is, the control device 4 may be integrally provided in any of the gas compressors 1A to 1E, or integrally configured with the motor control device 7 of any of the gas compressors 1A to 1E. It is also good. The same effects as described above can be obtained also in such a modified example.
また、上記一実施形態においては、ガス圧縮機の総台数が５台である場合を例にとって説明したが、これに限られず、少なくとも２台あればよい。変形例としてガス圧縮機の総台数がＮ台である場合を例にとり、このときの制御テーブルの具体例を図５に示す。このような変形例においても、上記同様の効果を得ることができる。
Moreover, in the said one Embodiment, although the case where the total number of gas compressors was five was demonstrated to the example, it is not restricted to this, and there should just be at least two. As a modification, a case where the total number of gas compressors is N is taken as an example, and a specific example of the control table at this time is shown in FIG. The same effects as described above can be obtained also in such a modified example.
また、上記一実施形態において、特に説明しなかったが、制御装置４は、ガス圧縮機の総台数や、各整備ランクに対応する運転時間の上限値等の情報を入力可能とし、それらに基づいて制御テーブルを作成する機能を有してもよい。このような変形例においても、上記同様の効果を得ることができる。
Further, although not particularly described in the above embodiment, the control device 4 can input information such as the total number of gas compressors and the upper limit value of operation time corresponding to each maintenance rank, and based on them May have a function of creating a control table. The same effects as described above can be obtained also in such a modified example.
１Ａ，１Ｂ，１Ｃ，１Ｄ，１Ｅ…ガス圧縮機、２…貯留槽、３…圧力センサ、４…制御装置、１０…総運転時間推定部、１１…記憶部、１２…優先度設定部、１３…運転台数制御部
1A, 1B, 1C, 1D, 1E ... gas compressor, 2 ... storage tank, 3 ... pressure sensor, 4 ... control device, 10 ... total operating time estimation unit, 11 ... storage unit, 12 ... priority setting unit, 13 ... Operation quantity control unit
Claims (5)
- 複数のガス圧縮機と、前記ガス圧縮機の運転台数を制御する制御装置とを備えた圧縮ガス製造装置において、
前記制御装置は、
現在における前記複数のガス圧縮機のそれぞれの運転時間を取得し、これに基づいて将来の整備時における前記複数のガス圧縮機の総運転時間を推定する総運転時間推定部と、
前記複数のガス圧縮機の総運転時間と前記複数のガス圧縮機のそれぞれの整備ランクに対応する前記複数のガス圧縮機のそれぞれの運転時間の上限値との関係であって、前記総運転時間が増加するのに従って比較的高い整備ランクのガス圧縮機の台数が徐々に増加するように設定された制御テーブルを記憶する記憶部と、
前記制御テーブルを用い、前記総運転時間推定部で推定された総運転時間に応じて前記複数のガス圧縮機のそれぞれの運転時間の上限値を設定し、これに基づいて前記複数のガス圧縮機のそれぞれの優先度を設定する優先度設定部と、
前記ガス圧縮機の運転台数を制御すると共に、前記優先度設定部で設定された優先度に基づいて運転すべきガス圧縮機を選択する運転台数制御部とを有することを特徴とする圧縮ガス製造装置。 In a compressed gas production apparatus comprising: a plurality of gas compressors; and a control device for controlling the number of operating gas compressors,
The controller is
A total operating time estimation unit for acquiring the operating time of each of the plurality of gas compressors at present, and estimating the total operating time of the plurality of gas compressors at the time of future maintenance based on this;
The relationship between the total operating time of the plurality of gas compressors and the upper limit value of the operating time of each of the plurality of gas compressors corresponding to the maintenance rank of each of the plurality of gas compressors, the total operating time A storage unit for storing a control table which is set so that the number of gas compressors of relatively high maintenance rank gradually increases as
The upper limit value of the operation time of each of the plurality of gas compressors is set according to the total operation time estimated by the total operation time estimation unit using the control table, and based on this, the plurality of gas compressors A priority setting unit for setting the priority of each of
A compressed gas production system comprising: an operating number control unit for controlling the number of operating gas compressors and selecting a gas compressor to be operated based on the priority set by the priority setting unit. apparatus. - 請求項１に記載の圧縮ガス製造装置において、
前記制御装置の前記優先度設定部は、運転時間の上限値が比較的小さいガス圧縮機の優先度より、前記運転時間の上限値が比較的大きいガス圧縮機の優先度を高く設定することを特徴とする圧縮ガス製造装置。 In the compressed gas production apparatus according to claim 1,
The priority setting unit of the control device may set the priority of the gas compressor having a relatively high upper limit value of the operation time higher than the priority of the gas compressor having a relatively small upper limit value of the operation time. Features compressed gas production equipment. - 請求項２に記載の圧縮ガス製造装置において、
前記制御装置の前記運転台数制御部は、優先度が同じであれば、現在の運転時間に基づいて運転すべきガス圧縮機を選択することを特徴とする圧縮ガス製造装置。 In the compressed gas production apparatus according to claim 2,
The compressed gas production device according to claim 1, wherein the number-of-operations control unit of the control device selects a gas compressor to be operated based on the current operation time if the priorities are the same. - 請求項１に記載の圧縮ガス製造装置において、
前記総運転時間推定部による総運転時間の推定及び前記優先度設定部による優先度の設定は、周期的に行われることを特徴とする圧縮ガス製造装置。 In the compressed gas production apparatus according to claim 1,
The compressed gas manufacturing apparatus characterized in that the estimation of the total operating time by the total operating time estimation unit and the setting of the priority by the priority setting unit are performed periodically. - 請求項１に記載の圧縮ガス製造装置において、
前記複数のガス圧縮機から吐出された圧縮ガスを貯留する貯留槽と、前記貯留槽内の圧力を検出する圧力センサとを備え、
前記制御装置は、前記圧力センサで検出された圧力に基づいて前記ガス圧縮機の運転台数を制御することを特徴とする圧縮ガス製造装置。 In the compressed gas production apparatus according to claim 1,
A storage tank storing compressed gas discharged from the plurality of gas compressors; and a pressure sensor detecting a pressure in the storage tank.
The control device controls the number of operating gas compressors based on the pressure detected by the pressure sensor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001330290A (en) * | 2000-05-19 | 2001-11-30 | Sanyo Electric Co Ltd | Air conditioning unit |
| JP2007297936A (en) * | 2006-04-28 | 2007-11-15 | Teral Kyokuto Inc | Water supply device |
| JP2014152698A (en) * | 2013-02-08 | 2014-08-25 | Hitachi Industrial Equipment Systems Co Ltd | Fluid compression system |
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| JP6355987B2 (en) * | 2014-06-24 | 2018-07-11 | ヤンマー株式会社 | Chiller system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001330290A (en) * | 2000-05-19 | 2001-11-30 | Sanyo Electric Co Ltd | Air conditioning unit |
| JP2007297936A (en) * | 2006-04-28 | 2007-11-15 | Teral Kyokuto Inc | Water supply device |
| JP2014152698A (en) * | 2013-02-08 | 2014-08-25 | Hitachi Industrial Equipment Systems Co Ltd | Fluid compression system |
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