CN105781958B - A kind of diaphragm pump one-way valve fault self-diagnosis system and diagnostic method - Google Patents
A kind of diaphragm pump one-way valve fault self-diagnosis system and diagnostic method Download PDFInfo
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- CN105781958B CN105781958B CN201610182473.7A CN201610182473A CN105781958B CN 105781958 B CN105781958 B CN 105781958B CN 201610182473 A CN201610182473 A CN 201610182473A CN 105781958 B CN105781958 B CN 105781958B
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- 238000004092 self-diagnosis Methods 0.000 title claims abstract description 15
- 238000002405 diagnostic procedure Methods 0.000 title claims abstract description 8
- 230000001133 acceleration Effects 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 230000004069 differentiation Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 7
- 238000003745 diagnosis Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009923 sugaring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- F04B51/00—Testing machines, pumps, or pumping installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to a kind of diaphragm pump one-way valve fault self-diagnosis system and diagnostic method, belong to automatic control technology field.The present invention includes pressure transmitter, acceleration transducer, high shielding data connecting line, multi-channel data acquisition board, industrial control computer and fault alarm；The present invention can monitor diaphragm pump one-way valve fault in real time, remind operation and maintenance personnel that check valve is repaired or replaced in time, avoid one-way valve fault and bring about great losses.Meanwhile parameter measure and the combination based on signal processing detection method are realized, improve the accuracy and reliability of diaphragm pump one-way valve fault differentiation.
Description
Technical field
The present invention relates to a kind of diaphragm pump one-way valve fault self-diagnosis system and diagnostic method, belongs to automatic control technology neck
Domain.
Background technology
Large-scale diaphragm pump belongs to the category of reciprocating pump, the solid-liquid applied to complex working conditions such as conveying high-pressure, high temperature, high corrosions
Two-phase medium, it is wider in the field of industrial production application such as oil, chemical industry, coal, metallurgy, sugaring and sewage disposal.Check valve is made
For an important component of machine of pump ,/quick closing valve, leakproofness and pressure-bearing property need to be opened soon with good, thus compare other of pump
Component is easier to break down.One-way valve fault causes equipment pressure and flowed fluctuation, so as to cause vibration equipment, causes equipment
Damage, or even major industrial accident can be caused.Meanwhile the size grading of the operating status of check valve and institute's pumped (conveying) medium,
Slurry rheological behavior and discharge pressure etc. are closely related, and also the intrinsic material properties with pump, installation etc. are closely related.This causes list
There is sudden, concurrency, diversity, non-stationary and non-linear to the failure of valve, greatly increase one-way valve fault
The difficulty of diagnosis.But the application and research of current high-pressure diaphragm pump check valve are concentrated mainly on the monitoring of technological parameter, either
Import or domestic diaphragm pump, are to be differentiated by staff according to sound without one-way valve fault auto-check system,
It can not accomplish promptness, the accuracy fixed a breakdown.In addition, the maintenance of check valve, which is replaced, lacks self-adaptive estimation mechanism, usually
Using periodically inspection and maintenance replaces mechanism (when being usually 1200 small).Periodic replacement will necessarily cause the waste of resource and equipment
(check valve changed sometimes is not bad, it is nonetheless possible to use).But, can not be unidirectional due to lacking adaptive judge mechanism
Valve carries out early warning replacement when approaching damage.Therefore, carry out diaphragm pump one-way valve self-diagnosis system and method to anticipate with most important theories
Justice and economic value.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of diaphragm pump one-way valve fault self-diagnosis system and diagnostic method,
The combination of parameter measure and signal processing detection method is realized, replacement is diagnosed and repaired for one-way valve fault and is provided
Self-adaptive estimation and alarm mechanism, overcome the deficiency of existing check valve diagnosis mechanism, while improve the accurate of failure judge
Property and reliability.
The technical scheme is that：A kind of diaphragm pump one-way valve fault self-diagnosis system, including pressure transmitter 6, plus
Velocity sensor 7, high shielding data connecting line 8, multi-channel data acquisition board 9, industrial control computer 10 and fault alarm
11；Acceleration sensor 7 uses magnetic adsorption type sensor, is directly fixed on the shell of feed check valve 12 and discharge check valve 5
Directly over body, pressure transmitter 6 be separately mounted to 5 connecting pipe of 12 connecting pipe of feed check valve and discharge check valve just on
The output port of side, acceleration transducer 7 and pressure transmitter 6 passes through height shielding data connecting line 8 and multi-channel data acquisition
The input port of card 9 is connected, and the output port of multi-channel data acquisition board 9 passes through serial bus 13 and industrial control computer
10 are connected, and the output of industrial computer 10 is connected by signal transmssion line 14 with fault alarm 11.
A kind of diagnostic method of diaphragm pump one-way valve fault self-diagnosis system, concretely comprises the following steps：
Step1, pressure transmitter 6 gather the pressure signal of feed check valve 12 and discharge check valve 5 respectively, according to formula
(A) the average amplitude AM_mean of collection pressure signal is calculated；If in every T/2, | AM_mean-P | during ＞ 0, it is determined as failure；
In formula, N is sampled data sample length, and xi represents the pressure signal value of the i-th moment collection, and P is completely newly into material list
To valve and the corresponding pressure mean values of discharge check valve；
Step2, acceleration transducer 7 gather the vibration signal of feed check valve 12 and discharge check valve 5 respectively, according to public affairs
Formula (B) judges signal with the presence or absence of periodically " convex " feature；When periodically " convex " feature consecutive variations, differentiate that the results show is
Failure；
In formula, T is a data sampling period, i.e. feed check valve (12) and discharge check valve (5) work a cycle,
N is the data sampling points in a sampling period T, and xi represents the vibration signal value of the i-th moment collection.
Step3, when Step1 and Step2 is determined as failure, excitation fault alarm carry out fault alarm, otherwise turn
Enter the monitoring of subsequent cycle.
The beneficial effects of the invention are as follows：Diagnose and repair to replace for diaphragm pump one-way valve fault and self-adaptive estimation and report are provided
Alert mechanism, overcomes the shortcomings of existing check valve diagnosis mechanism, while improves the accuracy and reliability of failure judge.
Brief description of the drawings
Fig. 1 is failure self-diagnosis device block diagram of the present invention；
Fig. 2 is fault self-diagnosis method flow chart of the present invention；
When Fig. 3 is diaphragm pump one-way valve normal operation of the present invention, a cycle T internal check valves discharge and feed pressure waveform
Figure；
Fig. 4 is feed check valve card valve false pressure signal waveforms of the present invention；
Fig. 5 is feed check valve normal operation vibration signal waveforms figure of the present invention；
Fig. 6 is feed check valve card valve fault vibration signal waveforms of the present invention；
Fig. 7 is discharge check valve card valve false pressure signal waveforms of the present invention；
Fig. 8 is discharge check valve normal operation vibration signal waveforms figure of the present invention；
Fig. 9 is discharge check valve card valve fault vibration signal waveforms of the present invention.
In figure：1- piston cylinders, 2- guide rods, 3- probes, 4- membranes, 5- discharge check valves, 6- pressure transmitters, 7- acceleration
Sensor, 8- high shielding data connecting lines, 9- multi-channel data acquisition boards, 10- industrial control computers, 11- fault alarms,
12- feed check valves, 13- serial bus, 14- signal transmssion lines.
Embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
As shown in Figure 1, a kind of diaphragm pump one-way valve fault self-diagnosis system, including pressure transmitter 6, acceleration transducer
7th, high shielding data connecting line 8, multi-channel data acquisition board 9, industrial control computer 10 and fault alarm 11；Accelerate sensing
Device 7 uses magnetic adsorption type sensor, is directly fixed on directly over the housing of feed check valve 12 and discharge check valve 5, pressure
Power transmitter 6 is separately mounted to the surface of 5 connecting pipe of 12 connecting pipe of feed check valve and discharge check valve, and acceleration passes
The input terminal that the output port of sensor 7 and pressure transmitter 6 passes through high shielding data connecting line 8 and multi-channel data acquisition board 9
Mouth is connected, and the output port of multi-channel data acquisition board 9 is connected by serial bus 13 with industrial control computer 10, work
The output of industry computer 10 is connected by signal transmssion line 14 with fault alarm 11.
As shown in Fig. 2, a kind of diagnostic method of diaphragm pump one-way valve fault self-diagnosis system, concretely comprises the following steps：
Step1, pressure transmitter 6 gather the pressure signal of feed check valve 12 and discharge check valve 5 respectively, according to formula
(A) the average amplitude AM_mean of collection pressure signal is calculated；If in every T/2, | AM_mean-P | during ＞ 0, it is determined as failure；
In formula, N is sampled data sample length, and xi represents the pressure signal value of the i-th moment collection, and P is completely newly into material list
To valve and the corresponding pressure mean values of discharge check valve；
Step2, acceleration transducer 7 gather the vibration signal of feed check valve 12 and discharge check valve 5 respectively, according to public affairs
Formula (B) judges signal with the presence or absence of periodically " convex " feature；When periodically " convex " feature consecutive variations, differentiate that the results show is
Failure；
In formula, T is a data sampling period, i.e. feed check valve (12) and discharge check valve (5) work a cycle,
N is the data sampling points in a sampling period T, and xi represents the vibration signal value of the i-th moment collection.
Step3, when Step1 and Step2 is determined as failure, excitation fault alarm carry out fault alarm, otherwise turn
Enter the monitoring of subsequent cycle.
Wherein, if check valve feed pressure is P_in (3-5 kilograms), blowdown pressure is P_out (80-100 kilograms), then single
Moved back and forth to valve in a cycle T, its normal variation waveform is as shown in Figure 3.
To the testing result of import and export check valve card valve failure as shown in Fig. 4 to Fig. 9.
Specific embodiment is illustrated with reference to Fig. 4 to Fig. 9.
Embodiment 1：When card valve failure occurs for feed check valve, fault self-diagnosis step of the present invention is as follows：
Step1, within the preceding T/2 cycle, pressure transmitter 6 gather feed check valve 12 pressure signal.Pass through formula (A)
The average amplitude AM_mean=P_in of pressure signal is calculated, and | AM_mean-P_out | ＞ 0.It is shown as feed pressure P_
In, does not rise to normal blowdown pressure P_out.Principium identification result breaks down for feed check valve, as shown in Figure 4.
Step2, acceleration transducer 7 gather the vibration signal of feed check valve 12, are calculated through formula (B), in preceding T/2
When, its vibration signal average amplitude AM_mean>0；In rear T/2, signal averaging amplitude AM_mean<0.Repeat follow-up sampling
In the cycle, have consistent rule.Periodicity " convex " feature of signal is obtained, differentiation result is feed check valve failure.
Step3, Step1 and Step2 are determined as feed check valve and break down, and excite fault alarm 11, carry out event
Barrier alarm.
Embodiment 2：When card valve failure occurs for discharge check valve, fault self-diagnosis step of the present invention is as follows：
Step1, within the rear T/2 cycle, pressure transmitter 6 gathers the pressure signal of discharge check valve 5, pass through formula (A)
Calculate the average amplitude AM_mean=P_out of pressure signal>P_in (normal feed pressure), and | AM_mean-P_in | ＞ 0.
Principium identification result breaks down for discharge check valve, and the results are shown in Figure 7 for display.
Step2, acceleration transducer 7 gather 5 vibration signal of discharge check valve, are calculated through formula (B), in preceding T/2, its
Vibration signal average amplitude AM_mean>0；In rear T/2, signal averaging amplitude AM_mean<0.The follow-up sampling period is repeated,
With consistent rule.Periodicity " convex " feature of signal is obtained, differentiation result is feed check valve failure.
Step3, Step1 and Step2 are determined as discharge check valve and break down, and excite fault alarm 11, carry out event
Barrier alarm.
The embodiment of the present invention is explained in detail above in association with attached drawing, but the present invention is not limited to above-mentioned
Embodiment, within the knowledge of a person skilled in the art, can also be before present inventive concept not be departed from
Put that various changes can be made.
Claims (1)
1. a kind of diagnostic method of diaphragm pump one-way valve fault self-diagnosis system, it is characterised in that concretely comprise the following steps：
Step1, pressure transmitter (6) gather the pressure signal of feed check valve (12) and discharge check valve (5) respectively, according to public affairs
Formula (A) calculates the average amplitude AM_mean of collection pressure signal；If in every T/2, | AM_mean-P | during ＞ 0, it is determined as event
Barrier；
In formula, N is sampled data sample length, and xi represents the pressure signal value of the i-th moment collection, and P is to feed under normal circumstances
Check valve and the corresponding pressure mean values of discharge check valve；In the preceding T/2 cycles, AM_mean refers to that the pressure of feed check valve is put down
Equal amplitude, the value of P are the pressure mean values of discharge check valve under normal circumstances；Afterwards in the T/2 cycles, AM_mean refers to discharge
The pressure average amplitude of check valve, the value of P are the pressure mean values of feed check valve under normal circumstances；
Step2, acceleration transducer (7) gather the vibration signal of feed check valve (12) and discharge check valve (5) respectively, according to
Formula (B) judges signal with the presence or absence of periodically " convex " feature；When periodically " convex " feature consecutive variations, the results show is differentiated
For failure；
In formula, T is feed check valve (12) and discharge check valve (5) work a cycle, is also defined as follow-up data
Sampling period, N are the data sampling points in a sampling period T, and xi represents the vibration signal value of the i-th moment collection；Monitoring
During feed check valve, xi refers to the vibration signal value of single feed check valve, and AM_mean also refers to unidirectional using individually charging
The vibration signal average that the vibration signal value xi of valve is calculated；When monitoring discharge check valve, xi refers to single discharge check valve
Vibration signal value, AM_mean also refers to the vibration letter that the vibration signal value xi using single discharge check valve is calculated
Number average；
Step3, when Step1 and Step2 is determined as failure, excitation fault alarm carry out fault alarm, be otherwise transferred to down
The monitoring of one circulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610182473.7A CN105781958B (en) | 2016-03-28 | 2016-03-28 | A kind of diaphragm pump one-way valve fault self-diagnosis system and diagnostic method |
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| CN201610182473.7A CN105781958B (en) | 2016-03-28 | 2016-03-28 | A kind of diaphragm pump one-way valve fault self-diagnosis system and diagnostic method |
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| CN105781958B true CN105781958B (en) | 2018-04-24 |
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| CN107269511B (en) * | 2017-07-03 | 2019-08-16 | 西南交通大学 | A kind of diaphragm pump one-way valve real-time fault detection method and system |
| EP3536955A1 (en) * | 2018-03-08 | 2019-09-11 | Berlin Heart GmbH | Drive device for a membrane fluid pump and operation method |
| CN109282985A (en) * | 2018-08-16 | 2019-01-29 | 昆明理工大学 | A kind of high-pressure diaphragm pump one-way valve fault diagnostic method based on VMD and Wigner-Ville |
| CN109724793A (en) * | 2018-12-21 | 2019-05-07 | 云南大红山管道有限公司 | Piston-diaphragm pump one-way valve fault automatic detection device |
| CN109899280A (en) * | 2019-03-28 | 2019-06-18 | 昆明理工大学 | A kind of fault detection means and its troubleshooting methodology of high-pressure diaphragm pump check valve |
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| JPH03168377A (en) * | 1989-11-27 | 1991-07-22 | Kawasaki Steel Corp | Method and device for diagnosing abnormality of pump |
| CN201137561Y (en) * | 2007-10-12 | 2008-10-22 | 中国有色集团沈阳冶金机械有限公司 | Diaphram pump one way valve fault automatic diagnosis device |
| CN102926983A (en) * | 2012-11-06 | 2013-02-13 | 昆山北极光电子科技有限公司 | State inspection system for compressor unit |
| CN203035524U (en) * | 2013-01-23 | 2013-07-03 | 中煤科工集团武汉设计研究院 | Alarm device of valve blocking failure of membrane pump check valve |
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Effective date of registration: 20240605 Address after: 653405 Jia Sa Avenue, Jia Sa Town, Xinping Yi and Dai Autonomous County, Yuxi City, Yunnan Province Patentee after: YUNNAN DAHONGSHAN PIPELINE Ltd. Country or region after: China Address before: 650093 No. 253, Xuefu Road, Wuhua District, Yunnan, Kunming Patentee before: Kunming University of Science and Technology Country or region before: China |
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