阅读说明：本技术 一种注聚泵故障诊断系统 (Failure diagnosis system for polymer injection pump ) 是由 任桂山 刘晴 葛党科 钱晓辉 李智莹 李红艳 王存博 方睿 于 2019-08-05 设计创作，主要内容包括：本发明公开了一种注聚泵故障诊断系统,包括：振动变送器,用于检测注聚泵的振动状态,并对应输出注聚泵的振动信号给可编程控制单元PLC；压力变送器,用于检测注聚泵的液体压力状态,并对应输出注聚泵的压力信号给可编程控制单元PLC；在线粘度计,用于检测注聚泵内流经液体的粘度,并输出对应的粘度信号给PLC；可编程控制单元转发给中央监控服务器；中央监控服务器,与PLC相连接,用于进行故障信息诊断。本发明公开的注聚泵故障诊断系统,其应用振动、压力、粘度信号形成多参数诊断数据库,基于注聚泵液力端的振动、出口粘度、压力多参数相关结合的方式,形成的故障诊断方式,诊断结果准确性和可靠性较高,具有重大的生产实践意义。(The invention discloses a fault diagnosis system for a polymer injection pump, which comprises: the vibration transmitter is used for detecting the vibration state of the polymer injection pump and correspondingly outputting a vibration signal of the polymer injection pump to the programmable control unit PLC; the pressure transmitter is used for detecting the liquid pressure state of the polymer injection pump and correspondingly outputting a pressure signal of the polymer injection pump to the programmable control unit PLC; the on-line viscometer is used for detecting the viscosity of the liquid flowing through the polymer injection pump and outputting a corresponding viscosity signal to the PLC; the programmable control unit forwards the data to the central monitoring server; and the central monitoring server is connected with the PLC and is used for diagnosing fault information. The fault diagnosis system of the polymer injection pump disclosed by the invention forms a multi-parameter diagnosis database by applying vibration, pressure and viscosity signals, and forms a fault diagnosis mode based on a mode of multi-parameter correlation combination of vibration, outlet viscosity and pressure of a fluid end of the polymer injection pump, so that the diagnosis result accuracy and reliability are higher, and the fault diagnosis system has great production practice significance.)

1. An infusion pump fault diagnostic system, comprising:

the vibration transmitter is arranged on the polymer injection pump and is used for detecting the vibration state of the polymer injection pump and correspondingly outputting a vibration signal of the polymer injection pump to the programmable control unit PLC;

the pressure transmitter is arranged on the polymer injection pump and is used for detecting the liquid pressure state of the polymer injection pump and correspondingly outputting a pressure signal of the polymer injection pump to the programmable control unit PLC;

the on-line viscometer is arranged on the polymer injection pump and is used for detecting the viscosity of the liquid flowing through the polymer injection pump and outputting a corresponding viscosity signal to the programmable control unit PLC;

the programmable control unit PLC is respectively connected with the vibration transmitter, the pressure transmitter and the online viscometer, and is used for receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump, which are respectively collected by the vibration transmitter, the pressure transmitter and the online viscometer, and then forwarding the signals to the central monitoring server;

and the central monitoring server is connected with the programmable control unit PLC and used for establishing a fault diagnosis system, particularly for pre-storing a fault diagnosis database, screening corresponding fault diagnosis information from the fault diagnosis database after receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump forwarded by the programmable control unit PLC, and displaying and alarming in real time, wherein the fault diagnosis information comprises fault positions, fault alarm signals and fault types.

2. The system of claim 1, wherein the vibration transducer is mounted centrally on a flange of the plunger at the fluid end of the infusion pump.

3. The system of claim 1, wherein the pressure transducers are mounted at an inlet and an outlet of the infusion pump.

4. The system of claim 1, wherein the in-line viscometer is mounted at the outlet of the infusion pump.

5. The focus pump failure diagnostic system according to claim 1, wherein the failure diagnosis database stores in advance a plurality of different failure locations, a plurality of different failure alarm signals, a plurality of different failure types, a plurality of different vibration signals, a plurality of different pressure signals, and a plurality of different viscosity signals, and correspondence relationships therebetween.

6. The focus pump failure diagnostic system according to any one of claims 1 to 5, wherein the central monitoring server, in particular, comprises a failure diagnostic database storage module and a failure diagnostic module, wherein;

the fault diagnosis database storage module is used for storing a fault diagnosis database in advance;

and the fault diagnosis module is respectively connected with the programmable control unit PLC and the fault diagnosis database storage module and is used for receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump forwarded by the programmable control unit PLC, then performing data retrieval and comparison from the fault diagnosis database stored by the fault diagnosis database storage module to obtain corresponding fault diagnosis information, and displaying and alarming in real time, wherein the fault diagnosis information comprises fault positions, fault alarm signals and fault types.

7. The system for diagnosing faults of an infusion pump according to claim 6, wherein the fault diagnosis module is further configured to compare the vibration amplitude of the vibration signal of the infusion pump with a preset threshold value, and send out an alarm signal in real time when the vibration amplitude is greater than the preset threshold value.

Technical Field

The invention relates to the technical field of tertiary oil recovery in oil exploitation, in particular to a fault diagnosis system for a polymer injection pump.

Background

Tertiary oil recovery is an important mode of oil field exploitation, and in order to improve recovery efficiency, chemical agents such as polymers, surfactants and the like are generally injected into a stratum, and a polymer injection pump is a main device used for injecting the chemical agents into the stratum. Because the chemical reagent has the characteristics of high pressure, high viscosity and the like in the injection process, the fault rate of the polymer injection pump in the operation process is high, and the fault diagnosis and the maintenance are difficult.

At present, one of the prior art is to judge the faults of a liquid discharge valve of a polymer injection pump, a spring, liquid leakage and the like by listening when an operator inspects the inspection or detecting whether a vibration parameter is abnormal by using a handheld vibration meter, and then carry out troubleshooting and maintenance according to a manual preliminary judgment result. The method has poor real-time performance, and equipment faults cannot be found in time; secondly, the error of manual judgment is large, and the overhaul cost and the workload are large.

Another prior art is to rely on real-time collection of pressure parameters to determine the failure of the drain valve of the polymer injection pump by analyzing and diagnosing pressure data. The method adopts a single pressure signal to carry out the fault of the liquid discharge valve, but after the fault of the polymer injection pump occurs, the fault is reflected on the change of the pressure signal, the signals such as vibration, viscosity and the like, the change of different parameters of the fault point is different, the diagnosis difficulty is higher and the accuracy is low through the single pressure signal.

Disclosure of Invention

The invention aims to provide a fault diagnosis system for an infusion pump, aiming at the technical defects in the prior art.

Therefore, the invention provides a fault diagnosis system for an infusion pump, which comprises the following components:

the vibration transmitter is arranged on the polymer injection pump and is used for detecting the vibration state of the polymer injection pump and correspondingly outputting a vibration signal of the polymer injection pump to the programmable control unit PLC;

the pressure transmitter is arranged on the polymer injection pump and is used for detecting the liquid pressure state of the polymer injection pump and correspondingly outputting a pressure signal of the polymer injection pump to the programmable control unit PLC;

the on-line viscometer is arranged on the polymer injection pump and is used for detecting the viscosity of the liquid flowing through the polymer injection pump and outputting a corresponding viscosity signal to the programmable control unit PLC;

the programmable control unit PLC is respectively connected with the vibration transmitter, the pressure transmitter and the online viscometer, and is used for receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump, which are respectively collected by the vibration transmitter, the pressure transmitter and the online viscometer, and then forwarding the signals to the central monitoring server;

and the central monitoring server is connected with the programmable control unit PLC and used for establishing a fault diagnosis system, particularly for pre-storing a fault diagnosis database, screening corresponding fault diagnosis information from the fault diagnosis database after receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump forwarded by the programmable control unit PLC, and displaying and alarming in real time, wherein the fault diagnosis information comprises fault positions, fault alarm signals and fault types.

Wherein, the vibration transmitter is arranged at the central position of a plunger flange plate at the hydraulic end of the polymer injection pump.

Wherein, pressure transmitter installs the import and export of annotating the polymer pump.

Wherein, the on-line viscometer is arranged at the outlet of the polymer injection pump.

The fault diagnosis database stores a plurality of different fault positions, a plurality of different fault alarm signals, a plurality of different fault types, a plurality of different vibration signals, a plurality of different pressure signals, a plurality of different viscosity signals and corresponding relations among the different fault types, the different vibration signals, the different pressure signals and the different viscosity signals in advance.

The central monitoring server specifically comprises a fault diagnosis database storage module and a fault diagnosis module, wherein the fault diagnosis module is used for storing fault diagnosis data;

the fault diagnosis database storage module is used for storing a fault diagnosis database in advance;

and the fault diagnosis module is respectively connected with the programmable control unit PLC and the fault diagnosis database storage module and is used for receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump forwarded by the programmable control unit PLC, then performing data retrieval and comparison from the fault diagnosis database stored by the fault diagnosis database storage module to obtain corresponding fault diagnosis information, and displaying and alarming in real time, wherein the fault diagnosis information comprises fault positions, fault alarm signals and fault types.

The fault diagnosis module is also used for comparing the vibration amplitude in the vibration signal of the polymer injection pump with a preset threshold value, and sending an alarm signal in real time when the vibration amplitude is greater than the preset threshold value.

Compared with the prior art, the fault diagnosis system for the polymer injection pump provided by the invention has the advantages that the vibration, pressure and viscosity signals are applied to form the multi-parameter diagnosis database, the fault diagnosis mode is formed based on the mode of multi-parameter correlation combination of the vibration, outlet viscosity and pressure of the hydraulic end of the polymer injection pump, the accuracy and reliability of the diagnosis result are high, the defects of the prior art can be effectively overcome, and the fault diagnosis system has great production practice significance.

Drawings

FIG. 1 is a schematic structural diagram of a fault diagnosis system for a polymer injection pump according to the present invention;

FIG. 2 is a schematic view of the mounting and detecting positions of a vibration transducer probe on an infusion pump;

in the figure: 1 is the polymer injection pump, 2 is the hydraulic end plunger flange, and 3 is the vibration transmitter.

Detailed Description

In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.

Referring to fig. 1 and fig. 2, the invention provides a fault diagnosis system for a polymer injection pump, which is used for diagnosing the working condition of the fault of the polymer injection pump for tertiary oil recovery, and specifically comprises:

the vibration transmitter is used for detecting the vibration state of the polymer injection pump and correspondingly outputting a vibration signal of the polymer injection pump to the programmable control unit PLC;

the pressure transmitter is arranged on the polymer injection pump and is used for detecting the liquid pressure state of the polymer injection pump and correspondingly outputting a pressure signal of the polymer injection pump to the programmable control unit PLC;

the on-line viscometer is arranged on the polymer injection pump and is used for detecting the viscosity of the liquid flowing through the polymer injection pump and outputting a corresponding viscosity signal to the programmable control unit PLC;

the programmable control unit PLC is respectively connected with the vibration transmitter, the pressure transmitter and the online viscometer, and is used for receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump, which are respectively collected by the vibration transmitter, the pressure transmitter and the online viscometer, and then forwarding the signals to the central monitoring server;

and the central monitoring server is connected with the programmable control unit PLC and used for establishing a fault diagnosis system, particularly for pre-storing a fault diagnosis database, screening corresponding fault diagnosis information from the fault diagnosis database after receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump forwarded by the programmable control unit PLC, and displaying and alarming in real time, wherein the fault diagnosis information comprises fault positions, fault alarm signals and fault types.

In the present invention, in a specific implementation, the fault diagnosis database stores in advance a plurality of different fault locations, a plurality of different fault alarm signals, a plurality of different fault types, a plurality of different vibration signals, a plurality of different pressure signals, a plurality of different viscosity signals, and a correspondence relationship (i.e., a mapping relationship, such as a one-to-one correspondence relationship or a one-to-many relationship) therebetween;

the fault diagnosis information may include a fault location, a fault alarm signal, and a fault type, and of course, the setting may be adjusted according to the user's requirements.

In the invention, the central monitoring server specifically comprises a fault diagnosis database storage module and a fault diagnosis module, wherein the fault diagnosis database storage module is used for storing fault diagnosis data;

the fault diagnosis database storage module is used for storing a fault diagnosis database in advance;

and the fault diagnosis module is respectively connected with the programmable control unit PLC and the fault diagnosis database storage module and is used for receiving the vibration signal, the pressure signal and the viscosity signal of the polymer injection pump forwarded by the programmable control unit PLC, then performing data retrieval and comparison from the fault diagnosis database stored by the fault diagnosis database storage module to obtain corresponding fault diagnosis information, and displaying and alarming in real time, wherein the fault diagnosis information comprises fault positions, fault alarm signals and fault types.

It should be noted that the fault diagnosis module is further configured to compare a vibration amplitude in a vibration signal of the polymer injection pump with a preset threshold, and send an alarm signal in real time when the vibration amplitude is greater than the preset threshold;

the preset threshold is the vibration amplitude of the preset polymer injection pump during normal operation.

That is, in the invention, the fault diagnosis module may first analyze the vibration signal data, take the normal operation vibration data statistic value of the monitoring point at the same measuring point as a threshold, and send out an alarm signal if the vibration value at any moment exceeds a preset threshold.

According to the invention, the fault diagnosis module analyzes the acquired vibration, viscosity and pressure data, can diagnose the specific fault type of the polymer injection pump according to the preset fault diagnosis database and send out an alarm (the fault type diagnosis alarm result can be shown in the following table 1), thereby facilitating the next guidance of the operator for maintenance.

In particular, the central monitoring server also comprises a self-learning module;

the self-learning module is used for periodically performing self-learning according to historical fault signals (namely the fault signals with preset time intervals up to now) stored in the fault diagnosis database and the diagnosed corresponding fault types, and inputting and storing the fault types, characteristic data values (such as vibration amplitude values) and fault position information corresponding to different fault signals into the fault diagnosis database.

In the present invention, the failure diagnosis database of the infusion pump may store real-time data of vibration, viscosity, and pressure and historical data in advance, and may implement functions such as a function of displaying and querying the real-time data and the historical data, a data storage function, a data maintenance function, and data management. Meanwhile, a fault diagnosis characteristic value library can be established, and the characteristic frequency, viscosity and pressure values of different fault parts of the polymer injection pump are pre-calculated and stored to be used as the basis of fault diagnosis. In addition, the fault type, the characteristic value and the fault position corresponding to different fault signals can be stored, and the display query function, the data storage function, the data maintenance function and the data management function of real-time data and historical data can be realized.

In the invention, the fault diagnosis module can diagnose the fault type of the polymer injection pump according to the acquired vibration, pressure and viscosity signals and a preset fault diagnosis database, and send out an alarm to give out the fault type and the fault part (the fault type diagnosis alarm result is shown in table 1) for guiding the staff to overhaul.

Table 1 plunger type water injection pump fault type diagnosis alarm result table:

in the present invention, referring to fig. 2, a vibration transmitter 3 is installed at the center of a hydraulic end plunger flange 2 of an injection pump 1.

In the invention, the pressure transmitter is arranged at the inlet and the outlet of the polymer injection pump.

It should be noted that, the central monitoring server may perform pressure fault diagnosis through the fault diagnosis database, specifically perform diagnosis depending on a differential pressure between the inlet pressure and the outlet pressure, for example, determine whether the differential pressure is within a preset value range.

In the invention, in particular, the on-line viscometer is arranged at the outlet of the polymer injection pump.

It should be noted that, for the present invention, in particular, the vibration transmitter: precision: plus or minus 1 percent; the frequency response range is large: 0-1000 Hz; outputting a signal: 4-20 mA; the installation mode is as follows: performing strong magnetic adsorption; detecting the position: the center of the flange of the hydraulic end plunger (the installation schematic is shown in figure 2).

In concrete realization, pressure transmitter adopts intelligent pressure transmitter, and the precision: plus or minus 0.5 percent; outputting a signal: 4-20 mA; detecting the position: and an inlet and an outlet of the injection pump.

In the concrete realization, online viscometer, precision: plus or minus 5 percent; outputting a signal: RS-485; detecting the position: and (4) discharging the polymer injection pump.

In a specific implementation of the present invention, the central monitoring server includes a plurality of computer PCs, and is a server composed of a plurality of computer PCs.

In order to more clearly understand the effects of the present invention, the following description is given with reference to specific examples.

Selecting a tertiary oil recovery polymer injection station in an oil field, wherein 4 polymer injection pumps are arranged in the polymer injection station, and carrying out fault diagnosis application on the polymer injection pumps: and collecting plunger vibration signals of 4 polymer injection pumps, viscosity of an outlet of the polymer injection pump, and inlet and outlet pressures, and realizing fault diagnosis of the polymer injection pump strictly according to the technical scheme of the invention.

The system of the invention has two times of fault alarm within two months of operation:

1. first failure alarm: the system sends out II automatic alarm, and the diagnosis result is that the No. 2 injection pump No. two plunger springs are blocked. And (4) manually overhauling the stopped pump according to the diagnosis result, and finding that the spring of the pump is bent and deformed to cause blockage after the second plunger is disassembled.

2. And (4) alarming for the second fault: the system sends out VI automatic alarm, and the diagnosis result is No. 4 polymer injection pump packing leakage. And manually overhauling according to the diagnosis result to find that the pump packing is leaked.

Compared with the prior art, the fault diagnosis system for the polymer injection pump provided by the invention has the following beneficial effects:

1. the invention is a fault diagnosis mode formed based on a mode of multi-parameter correlation combination of vibration, outlet viscosity and pressure of the hydraulic end of the polymer injection pump, and the accuracy and reliability of a diagnosis result are higher.

2. The invention is less influenced by the vibration generated by the mechanical structure movement of the hydraulic end of the polymer injection pump, and has stronger adaptability to the field.

3. The fault diagnosis database formed by the invention has self-learning capability and can continuously improve the fault diagnosis function and accuracy of the system.

In summary, compared with the prior art, the fault diagnosis system for the polymer injection pump provided by the invention uses vibration, pressure and viscosity signals to form a multi-parameter diagnosis database, and a fault diagnosis mode is formed based on a mode of multi-parameter correlation combination of vibration, outlet viscosity and pressure of a hydraulic end of the polymer injection pump, so that the accuracy and reliability of a diagnosis result are high, the defects of the prior art can be effectively overcome, and the fault diagnosis system has great production practice significance.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.