CN117090562B - Abnormality monitoring system of tower type pumping unit and manufacturing method of components of abnormality monitoring system - Google Patents
Abnormality monitoring system of tower type pumping unit and manufacturing method of components of abnormality monitoring system Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 75
- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 230000005856 abnormality Effects 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 230000002159 abnormal effect Effects 0.000 claims abstract description 31
- 238000004458 analytical method Methods 0.000 claims abstract description 10
- 239000011888 foil Substances 0.000 claims description 121
- 238000004364 calculation method Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 28
- 239000011152 fibreglass Substances 0.000 claims description 28
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- 238000005259 measurement Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 23
- 229920002635 polyurethane Polymers 0.000 description 13
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
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- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
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- 229910000570 Cupronickel Inorganic materials 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/008—Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/40—Single-purpose machines or devices for grinding tubes internally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/50—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground, e.g. strings
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Abstract
The invention relates to the technical field of operation monitoring of a tower type pumping unit, in particular to an abnormality monitoring system of the tower type pumping unit and a manufacturing method of components thereof. The invention can quickly protect the machine halt and alarm by sensing abnormal vibration of the operation of the tower crane through the device, thereby preventing mechanical accidents, and solving the defects of high cost, complex analysis, difficult measurement and poor reliability of the existing monitoring technology.
Description
Technical Field
The invention relates to the technical field of operation monitoring of a tower type pumping unit, in particular to an abnormality monitoring system of the tower type pumping unit and a manufacturing method of components of the abnormality monitoring system.
Background
The tower type oil pumping machine is novel oil extraction mechanical equipment, has more advantages, is widely applied in the industry at present, but in practical application, as the power equipment is arranged on the upper part of the tower, the gravity center of the tower is higher, and under the influence of factors such as overlarge load or external strong wind, the vibration phenomenon exists in the frame body, if the vibration amplitude is overlarge, the conditions such as open welding and fracture of tower steel products due to metal fatigue are caused, and even the equipment scrapping condition seriously affects the safe operation of the equipment.
The existing monitoring technology has the defects of high cost, complex analysis, difficult measurement and poor reliability, so a more accurate and effective tower crane safe operation monitoring device is urgently needed.
Chinese patent publication No.: CN110761773a discloses a monitoring device for the operation state of oil pumping unit, which comprises: a clamping member having a first cavity for clamping a wire rope, a preset cavity and a circuit cavity in communication with the first cavity; the pressure sensor is arranged in the preset cavity and can be propped against the steel wire rope, and is used for sensing the pressure from the steel wire rope so as to acquire a pressure signal of the steel wire rope; and the data processing module is arranged in the circuit cavity, is electrically connected with the pressure sensor, and determines the operation state of the pumping unit according to the pressure signal of the steel wire rope.
The current device has complex procedure and low monitoring efficiency.
Disclosure of Invention
Therefore, the invention aims to provide an abnormality monitoring system of a tower type pumping unit and a manufacturing method of components thereof, which are used for solving the problems of complex procedures and low monitoring efficiency of the current device.
In order to achieve the aim, the invention provides an abnormality monitoring system of a tower type pumping unit, which comprises a tower type pumping unit abnormality monitoring strain gauge type vibration sensor component and a central control module,
Wherein the tower type pumping unit abnormality monitoring strain gauge type vibration sensor assembly comprises,
The plurality of foil type strain gages comprise a first foil type strain gage, a second foil type strain gage, a third foil type strain gage and a fourth foil type strain gage which are respectively stuck to the periphery of the inner side of the glass fiber reinforced plastic shell and are used for judging whether the tower type pumping unit vibrates abnormally or not according to the change of each resistance value when the tower type pumping unit frame body is mechanically deformed;
the temperature sensor detects real-time temperature inside the assembly, and judges whether the temperature inside the assembly has an influence on the actual resistance value of each foil type strain gauge according to the detected actual temperature value;
the central control module is respectively connected with the foil type strain gauges and the temperature sensors, the tower type oil pumping machine frame body generates displacement relative to vibration to cause deformation of each foil type strain gauge, so that the detection resistance value of each foil type strain gauge is changed, the central control module performs overall analysis according to the change of each detection resistance value, and the fault/shedding alarm level is divided according to the analysis result, so that the emergency degree of abnormal vibration of the whole tower type oil pumping machine frame body is judged, and corresponding fault/shedding alarm signals are sent out; compensating and correcting each detection resistance value of each foil type strain gauge according to the actual temperature value detected by the temperature sensor in real time, calculating an overall alarm calculation value according to each corrected actual resistance value, judging whether the fault/falling alarm signal is false alarm or not according to the number of the foil type strain gauges which are faulty/falling in the calculation process, judging whether the overall tower type oil pumping machine frame body has abnormal vibration or not, and judging whether the overall alarm signal is sent or not; the actual resistance value is the resistance value after compensation and correction of the detection resistance value.
Further, a resistance fluctuation assessment interval is arranged in the central control module, each detected resistance value is compared with the resistance fluctuation assessment interval, whether each foil type strain gauge has a fault/shedding situation or not is judged, if any detected resistance value does not fall into the resistance fluctuation assessment interval, the central control module judges that the foil type strain gauge has a fault/shedding, and the central control module sends out a fault/shedding alarm signal.
Further, the central control module determines the failure/falling alarm level H, H=0, 1,2,3 according to the number n of the foil-type strain gauges which are failed/falling, wherein n=0, 1,2,3,4,
If n=0, the central control module judges that the failure/falling alarm level H=0, all foil type strain gauges do not fail or fall off, and no failure/falling alarm signal is sent;
If n=1, the central control module judges the failure/falling off alarm level h=1, sends out a failure/falling off alarm signal, and further analyzes the failure/falling off condition of the foil type strain gauge to determine whether the failure/falling off condition is false;
If n=2, the central control module judges the failure/falling off alarm level H=2, sends out a failure/falling off alarm signal, and further analyzes the out-of-tolerance time t when each abnormal foil type strain gauge fails/falls off to determine whether the failure/falling off alarm signal is false;
If n=3, the central control module judges that the failure/falling alarm level h=3, and the central control module judges that the failure/falling situation of each abnormal foil type strain gauge is true, and sends out a failure/falling alarm signal.
Further, a temperature difference evaluation value is set in the central control module, when the actual temperature value detected by the temperature sensor is compared with a standard temperature value, a difference absolute value between the actual temperature value and the standard temperature value is calculated, whether the actual resistance value of the foil-type strain gauges is influenced by the temperature is judged according to the relation between the difference absolute value and the temperature difference evaluation value, so that whether the vibration abnormality occurs in the tower-type pumping unit is determined, if the difference absolute value is larger than the temperature difference evaluation value, the actual resistance value of each foil-type strain gauge is influenced by the judging temperature is judged, the central control module sends a correction signal to correct each detected resistance value,
The standard temperature value is arranged in the central control module and is determined by the working environment temperature of the tower type pumping unit.
Further, the method comprises the steps of. When the central control module corrects the detection resistance values,
If the actual temperature value is larger than the standard temperature value, a first adjusting parameter of the temperature difference value to each actual resistance value is set in the correction process,
Wherein,
The value of the first regulating parameter is determined according to the difference value between the actual temperature value and the standard temperature value;
If the actual temperature value is smaller than the standard temperature value, setting a second adjusting parameter of the temperature difference value to each actual resistance value in the correction process,
Wherein,
The value of the second regulation parameter is determined according to the difference between the standard temperature value and the actual temperature value.
Further, the central control module is internally provided with standard resistance values of the foil strain gauges, the absolute value of the difference between each actual resistance value and each standard resistance value obtained by correcting the detected resistance values is calculated according to the actual resistance values and the standard resistance values, the absolute value of the difference is compared with the evaluation value of the resistance difference to judge whether the vibration abnormality occurs at the position of each foil strain gauge, if any absolute value of the difference is larger than the evaluation value of the resistance difference, the vibration abnormality occurs at the position of the foil strain gauge, the central control module sends out an alarm signal of the position,
And the central control module is internally provided with resistance difference evaluation values, and each standard resistance value is a resistance value without considering temperature influence.
Further, the central control module is internally provided with an overall alarm evaluation value, an overall alarm calculation value is calculated according to the actual resistance value of each foil type strain gauge,
If the integral alarm calculated value is greater than or equal to the integral alarm evaluation value, abnormal vibration of the whole tower type oil pumping machine frame body is judged, and the central control module sends out an integral alarm signal.
Further, in the process of calculating the integral alarm calculated value by the central control module, a first calculation compensation parameter of the actual resistance value of the first foil type strain gauge to the integral alarm calculated value is set; the actual resistance value of the second foil type strain gauge is used for calculating a second compensation parameter of the integral alarm calculated value; a third calculation compensation parameter of the actual resistance value of the third foil type strain gauge to the integral alarm calculated value; a fourth calculation compensation parameter of the actual resistance value of the fourth foil-type strain gauge to the integral alarm calculated value;
The numerical value of each calculated compensation parameter is determined according to the absolute value of the difference between the actual resistance value of each foil type strain gauge and the standard resistance value corresponding to the actual resistance value.
Further, in the process of calculating the integral alarm calculated value by the central control module, a calculated parameter of the fault/shedding alarm level to the integral alarm calculated value is set, and the numerical value of the calculated parameter is determined according to the number n of the foil type strain gauges which have faults or shedding in all the foil type strain gauges.
The invention also provides a manufacturing method of the abnormality monitoring component of the tower type pumping unit, which is characterized by comprising the following steps of,
Step S1, preparing a glass fiber reinforced plastic pipe with a proper size, rotationally polishing the inside of the glass fiber reinforced plastic pipe by using a rotary steel wire grinding wheel until the surface is matte and smooth, immersing the polished glass fiber reinforced plastic pipe in acetone, and taking out and airing after placing for 10-20S;
S2, coating a special adhesive on the dried glass fiber reinforced plastic pipe, coating a special adhesive on the back of a substrate of a foil type strain gauge welded with a wire, stopping for 1min, feeding the foil type strain gauge into a corresponding position on the inner wall of the glass fiber reinforced plastic pipe, lightly sticking the foil type strain gauge, and repeatedly compacting the foil type strain gauge by using a small rubber wheel roller to penetrate into the glass fiber reinforced plastic pipe, wherein a certain working distance is reserved between the foil type strain gauge and two sides of the glass fiber reinforced plastic pipe;
S3, coating polyurethane flexible filler into the glass fiber reinforced plastic pipe after the foil-type strain gauge is pasted, covering the relevant area of the foil-type strain gauge completely by the polyurethane flexible filler, and standing for 8-10h;
S4, drilling and installing a socket at the central position of the socket frame, and welding a foil type strain gauge and a plurality of wires of a temperature sensor on a terminal of the socket; coating polyurethane flexible filler on the socket frame and embedding the polyurethane flexible filler into the first inner groove to finish bonding and sealing; and embedding the waterproof baffle sheet coated polyurethane flexible waterproof filler into a second inner groove of the glass fiber reinforced plastic shell to finish bonding and sealing.
Compared with the prior art, the invention has the beneficial effects that the central control module is respectively connected with each foil type strain gauge and each temperature sensor, the deformation of the foil type strain gauge is caused according to the displacement generated by the relative vibration of the tower type oil pumping machine frame body, the actual resistance value of the foil type strain gauge is changed, the central control module compares each detection resistance value with the resistance fluctuation evaluation interval, judges whether the foil type strain gauge fails/falls off, carries out failure/fall off alarm classification, compensates and corrects the detection resistance value of the foil type strain gauge according to the actual temperature value detected by the temperature sensor in real time, calculates the integral alarm calculated value according to the corrected actual resistance value, judges whether the tower type oil pumping machine frame body generates abnormal vibration and sends out the integral alarm signal, so that the device is stopped in time, the device senses the abnormal vibration of the tower type oil pumping machine, can quickly protect the machine from being stopped and alarm, and prevent mechanical accidents, and solves the defects of high cost, complex analysis, difficult measurement and poor reliability of the existing monitoring technology.
In particular, the assembly of the strain gauge type vibration sensor assembly can sense stress changes in multiple directions under different states such as stretching, twisting and transverse movement of the frame body, and resistance changes can be detected on the stress changes in different directions in a 90-degree corner area of the frame body of the tower pumping unit, so that the monitoring of the running state of the tower pumping unit is realized, the defect that the traditional gyroscope and accelerometer can only directionally acquire stress by adopting a three-coordinate positioning method is overcome, the quality of acquired data is improved, the interpretation step is simplified, and the strain gauge type vibration sensor assembly is particularly suitable for acquiring abnormal vibration information with uncertain resonance type directions.
In particular, the detection of the abnormal vibration of the whole tower can be completely obtained by installing 1 group of sensors in the 90-degree corner area of the oil pumping frame body of the tower in a vertical state and a horizontal state, and the on-site installation structure is simple and reliable.
In particular, the sensor carrier is made of glass fiber reinforced plastic pipe, so that the sensor carrier has strong fatigue resistance, good adaptability to overload, difficult permanent fatigue distortion, low cost, easy processing and the like compared with a metal material.
Drawings
FIG. 1 is a flow chart of a method of manufacturing an anomaly monitoring assembly for a tower-type pumping unit in an embodiment;
FIG. 2 is a schematic structural diagram of an anomaly monitoring assembly of a tower type pumping unit in an embodiment;
FIG. 3 is a side view of an anomaly monitoring assembly structure of a tower pumping unit in an embodiment;
FIG. 4 is a schematic diagram of an assembly of anomaly monitoring components of a tower pumping unit according to an embodiment;
FIG. 5 is a diagram of an installation pattern of an assembly of anomaly monitoring components of a tower pumping unit in a vertical position of a 90 degree corner region of a tower pumping unit frame body in an embodiment;
The drawings include: the strain gauge comprises a glass fiber reinforced plastic shell 1, a foil strain gauge 2, a socket frame 3, a socket 4, a first inner groove 5, welding spots 6, a temperature sensor 7, a second inner groove 8, a waterproof baffle 9, a first external thread 10, a first sensor seat 11, a second sensor seat 12, a waterproof sealing joint 13, a signal wire plug 14, a connecting thread 15, a signal wire 16, a fixed seat 17, a bolt hole 18, a mounting bolt 19, a tower steel beam 20, a strain gauge type vibration sensor assembly 21 and a second external thread 22.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1-5, fig. 1 is a flowchart illustrating a method for manufacturing an anomaly monitoring component of a tower-type pumping unit according to an embodiment; FIG. 2 is a schematic structural diagram of an anomaly monitoring assembly of a tower type pumping unit in an embodiment;
FIG. 3 is a side view of an anomaly monitoring assembly structure of a tower pumping unit in an embodiment; FIG. 4 is a schematic diagram of an assembly of anomaly monitoring components of a tower pumping unit according to an embodiment; FIG. 5 is a diagram of an embodiment of an assembly of anomaly monitoring components of a tower pumping unit in a vertical position at a 90 degree corner region of a frame body of the tower pumping unit.
The embodiment of the invention provides an abnormality monitoring component of a tower type pumping unit, which is a strain gauge type vibration sensor component and comprises,
The glass fiber reinforced plastic shell 1 is provided with a first inner groove 5 on one side of the inside and a second inner groove 8 on the other side, and a first external thread 10 and a second external thread 22 are respectively arranged on two sides of the outside;
The plurality of foil type strain gauges 2 are respectively stuck to the periphery of the inner side of the glass fiber reinforced plastic shell and are arc-shaped, and the foil type strain gauges comprise a first foil type strain gauge, a second foil type strain gauge, a third foil type strain gauge and a fourth foil type strain gauge, when the foil type strain gauges 2 are mechanically deformed, resistance values of the foil type strain gauges change and are used for detecting whether abnormal vibration occurs to a tower type oil pumping machine frame body, wherein each group of foil type strain gauges is provided with welding spots 6, and the surfaces of the foil type strain gauges are covered with flexible polyurethane type flexible waterproof fillers and are used for realizing waterproof sealing;
An receptacle holder 3 which is embedded in said first inner groove 5 inside said glass fiber reinforced plastic housing 1,
A socket 4 mounted on the socket frame 3, wherein terminals of the socket 4 are connected with the welding spots 6 on the two groups of foil strain gauges through wires respectively;
a temperature sensor 7 connected to the terminals of the socket 4 by wires for detecting a real-time temperature inside the assembly;
and the waterproof baffle 9 is embedded into the second inner groove 8 in the glass fiber reinforced plastic shell 1, and the outer side of the waterproof baffle is coated with polyurethane flexible waterproof filler for realizing waterproof sealing.
According to the embodiment of the invention, the sensor carrier is made of glass fiber reinforced plastic pipe, so that the sensor carrier has strong fatigue resistance, has good adaptability to overload, is not easy to generate permanent fatigue distortion, and has the advantages of low cost and easiness in processing compared with a metal material.
Specifically, the foil-type strain gauge 2 in this embodiment includes a strain sensitive element, a substrate, a cover layer and an outgoing line, where the strain sensitive element is made of a copper-nickel alloy material, and after the grid-shaped surface treatment is completed by etching treatment, the strain sensitive element is adhered to the substrate by a special adhesive to form the foil-type strain gauge, where the substrate is made of an epoxy resin sheet, and the corresponding terminals are soldered and connected by flexible wires, and the surface is sealed by a polyurethane plugging agent.
According to the embodiment of the invention, the assembly of the strain-gauge vibration sensor assembly can sense stress changes in multiple directions under different states of stretching, twisting, transverse moving and the like of the frame body, and resistance changes can be detected on the stress changes in different directions in a 90-degree corner area of the frame body of the tower pumping unit, so that the monitoring of the running state of the tower pumping unit is realized, the defect that the traditional gyroscope and accelerometer can only directionally collect stress by adopting a three-coordinate positioning method is overcome, the quality of collected data is improved, the interpretation step is simplified, and the method is particularly suitable for abnormal vibration information collection with an uncertain resonance type direction.
Specifically, the special adhesive in the embodiment is based on glycidylamine epoxy resin, and 10% of dibutyl phthalate, 50% of acetone, 5% of ethylenediamine and 10% of silicon dioxide are added, so that the special adhesive has good heat resistance and cold resistance, and the volume shrinkage rate of the adhesive layer is lower than 2%.
The embodiment of the invention also provides a manufacturing method of the abnormality monitoring component of the tower type pumping unit, which comprises the following steps of,
Step S1, preparing a glass fiber reinforced plastic pipe with a proper size, rotationally polishing the inside of the glass fiber reinforced plastic pipe by using a rotary steel wire grinding wheel until the surface is matte and smooth, immersing the polished glass fiber reinforced plastic pipe in acetone, and taking out and airing after placing for 10-20S;
S2, coating a special adhesive on the dried glass fiber reinforced plastic pipe, coating a special adhesive on the back of a substrate of a foil type strain gauge welded with a wire, stopping for 1min, feeding the foil type strain gauge into a corresponding position on the inner wall of the glass fiber reinforced plastic pipe, lightly sticking the foil type strain gauge, and repeatedly compacting the foil type strain gauge by using a small rubber wheel roller to penetrate into the glass fiber reinforced plastic pipe, wherein a certain working distance is reserved between the foil type strain gauge and two sides of the glass fiber reinforced plastic pipe;
S3, coating polyurethane flexible filler into the glass fiber reinforced plastic pipe after the foil-type strain gauge is pasted, covering the relevant area of the foil-type strain gauge completely by the polyurethane flexible filler, and standing for 8-10h;
S4, drilling and installing a socket at the central position of the socket frame, and welding a foil type strain gauge and a plurality of wires of a temperature sensor on a terminal of the socket; coating polyurethane flexible filler on the socket frame and embedding the polyurethane flexible filler into the first inner groove to finish bonding and sealing; and embedding the waterproof baffle sheet coated polyurethane flexible waterproof filler into a second inner groove of the glass fiber reinforced plastic shell to finish bonding and sealing.
Specifically, the embodiment further provides an assembly structure of an anomaly monitoring component of a tower type pumping unit, which comprises a strain gauge type vibration sensor component 21, a first sensor seat 11, a second sensor seat 12, a waterproof sealing joint 13, a signal wire plug 14, connecting threads 15, a signal wire 16, a fixing seat 17 and a bolt hole 18, wherein sealing grease is smeared between the connecting threads 15 of the first sensor seat 11 and the first external threads 10 of the strain gauge type vibration sensor component 21, the waterproof sealing joint 13 is arranged in the middle of the first sensor seat 11 and penetrates into the signal wire 16, the signal wire plug 14 is arranged at the front end of the signal wire 16, the signal wire plug 14 is inserted into the socket 4 on the strain gauge type vibration sensor component 21, and the connecting threads 15 of the second sensor seat 12 are smeared between the connecting threads 15 of the strain gauge type vibration sensor component 21 and the second external threads 22 of the strain gauge type vibration sensor component 21.
Specifically, the mounting mode of the assembly of the strain gauge type vibration sensor assembly in the embodiment comprises that 1 group of assemblies of strain gauge type vibration sensor assemblies are respectively mounted at the vertical position and the horizontal position of the 90-degree corner region of the tower type oil pumping machine frame body, wherein the assemblies of the strain gauge type vibration sensor assemblies are mounted at the positions of the 90-degree corner tower steel beam 20 of the tower type oil pumping machine in the vertical position, and mounting bolts 19 are inserted into bolt holes 18 in the fixed seat 17 at the bottom of the second sensor seat 12 for fastening.
According to the embodiment of the invention, the detection of the abnormal vibration of the whole tower can be completely obtained by respectively installing 1 group of sensors in the 90-degree corner area of the oil pumping frame body of the tower in a vertical state and a horizontal state, and the on-site installation structure is simple and reliable.
In particular, the embodiment also provides an abnormality monitoring system of the tower type pumping unit, which comprises a strain gauge type vibration sensor component and a central control module for abnormality monitoring of the tower type pumping unit,
The central control module is respectively connected with the first foil type strain gauge, the second foil type strain gauge, the fourth foil type strain gauge and the temperature sensor 7, the tower type oil pumping machine frame body generates displacement to cause deformation of each foil type strain gauge, the detection resistance value of each foil type strain gauge is changed, the central control module performs integral analysis according to the change of each detection resistance value, and the fault/shedding alarm level is divided according to analysis results, so that the emergency degree of abnormal vibration of the whole tower type oil pumping machine frame body is judged, and corresponding fault/shedding alarm signals are sent out; compensating and correcting each detection resistance value of each foil type strain gauge according to the actual temperature value detected by the temperature sensor 7 in real time, calculating an overall alarm calculation value according to each corrected actual resistance value, judging whether the fault/falling alarm signal is false alarm or not according to the number of the foil type strain gauges which are faulty/falling in the calculation process, judging whether the overall tower type oil pumping machine frame body has abnormal vibration or not, and sending out the overall alarm signal or not; the comprehensive monitoring enables the device to be stopped in time when the device fails and replaced and repaired in time when the foil type strain gauge fails or falls off; the actual resistance value is the resistance value after compensation and correction of the detection resistance value.
Specifically, in this embodiment, the detection resistance value of the first foil-type strain gauge is R11, the detection resistance value of the second foil-type strain gauge is R22, the detection resistance value of the third foil-type strain gauge is R33, the detection resistance value of the fourth foil-type strain gauge is R44, the detection resistance value ri of the i-th foil-type strain gauge, i=1, 2,3,4, the central control module is provided therein with a resistance fluctuation evaluation zone Z, and the detection resistance value ri corresponding to the i-th foil-type strain gauge is compared with the resistance fluctuation evaluation zone Z,
If the detected resistance value Rii falls into the resistance fluctuation assessment interval Z, the central control module judges that the resistance change fluctuation of the ith foil type strain gauge is normal, the ith foil type strain gauge does not have faults or fall off, and the central control module does not send out fault/fall off alarm signals;
if the detected resistance value Rii does not fall into the resistance fluctuation assessment interval Z, the central control module judges that the resistance change fluctuation of the ith foil type strain gauge is abnormal, the ith foil type strain gauge breaks down or falls off, and the central control module sends out a fault/fall-off alarm signal.
Specifically, the central control module in this embodiment determines the failure/drop alarm level H, h=0, 1,2,3,
If n=0, the central control module judges that the failure/falling alarm level H=0, all foil type strain gauges do not fail or fall off, and no failure/falling alarm signal is sent;
If n=1, the central control module judges the failure/falling off alarm level h=1, sends out a failure/falling off alarm signal, and further analyzes the failure/falling off condition of the foil type strain gauge to determine whether the failure/falling off condition is false;
If n=2, the central control module judges the failure/falling off alarm level H=2, sends out a failure/falling off alarm signal, and further analyzes the out-of-tolerance time t when each abnormal foil type strain gauge fails/falls off to determine whether the failure/falling off alarm signal is false;
If n=3, the central control module judges that the failure/falling alarm level h=3, and the central control module judges that the failure/falling situation of each abnormal foil type strain gauge is true, and sends out a failure/falling alarm signal.
Specifically, the central control module in this embodiment calculates, according to the actual temperature value T1 detected by the temperature sensor 7 in real time, the absolute value K, k= i 1-T0 i of the difference between the actual temperature value T1 and the standard temperature value T0, the actual resistance value of the first foil-type strain gauge is R1, the actual resistance value of the second foil-type strain gauge is R2, the actual resistance value of the third foil-type strain gauge is R3, the actual resistance value of the fourth foil-type strain gauge is R4, and for the actual resistance value Ri of the i-th foil-type strain gauge, i=1, 2,3,4,
If K is less than or equal to K0, judging that the temperature has no influence on the actual resistance value Ri of the ith foil-type strain gauge, the central control module does not send a correction signal, the actual resistance value Ri=Rii of the ith foil-type strain gauge,
If K is larger than K0, judging that the temperature has an influence on the resistance value of the ith foil-type strain gauge, sending a correction signal by the central control module, compensating and correcting the detection resistance value Rii,
Rii is the detection resistance value of the i-th foil-type strain gauge, i=1, 2,3,4, K0 is the temperature difference evaluation value set in the central control module, T0 is the standard temperature value set in the central control module, and the standard temperature value is determined by the working environment temperature of the tower-type pumping unit.
Specifically, in this embodiment, the central control module compensates and corrects the detected resistance value Ri of the i-th foil-type strain gauge so as to eliminate the influence of temperature on the actual resistance value Ri of the i-th foil-type strain gauge, a calculation formula of the actual resistance value Ri is set in the central control module,
If K > K0 and T1 > T0, ri= [1- (T1-T0) x a ]. Times.Rii,
Wherein a is a first adjustment parameter of a difference value between the actual temperature value T1 and the standard temperature value T0 to an actual resistance value Ri of the i-th foil type strain gauge, wherein the value of the first adjustment parameter a changes along with the difference value, and the larger the difference value is, the larger the value of the first adjustment parameter a is;
If K > K0 and T1 < T0, ri= [1+ (T0-T1) x b ]. Times.Rii,
Wherein b is a second adjustment parameter of a difference value between the standard temperature value T0 and the actual temperature value T1 to an actual resistance value Ri of the i-th foil-type strain gauge, and the value of the second adjustment parameter b changes with the magnitude of the difference value, and the larger the difference value is, the larger the value of the second adjustment parameter b is.
Specifically, in this embodiment, the standard resistance value R0i of the i-th foil-type strain gauge is set in the central control module, and based on the corrected actual resistance value Ri of the i-th foil-type strain gauge, the absolute value Si, si= i Ri-R0i of the difference between the actual resistance value Ri of the i-th foil-type strain gauge and the standard resistance value R0i is calculated,
If Si is less than or equal to S0, judging that vibration abnormality does not occur at the position of the ith foil type strain gauge, and enabling the central control module not to send out an ith alarm signal;
If Si is greater than S0, judging that vibration abnormality occurs at the position of the ith foil type strain gauge, and sending an ith alarm signal by the central control module;
and S0 is an evaluation value of the resistance difference value set in the central control module, and the standard resistance value is a resistance value without considering temperature influence.
Specifically, in this embodiment, the central control module is provided with an overall alarm evaluation value F0, and an overall alarm calculation value F is calculated according to the actual resistance value of each foil-type strain gauge, where the calculation formula is,
F＝[R1×c1+R2×c2+R3×c3+R4×c4]×D,
If F is more than or equal to F0, judging that the whole tower type oil pumping machine frame body has abnormal vibration, and sending out a whole alarm signal by the central control module;
if F is less than F0, judging that the whole tower type oil pumping machine frame body does not have abnormal vibration, wherein the central control module does not send out a whole alarm signal;
Wherein c1 is a first calculation compensation parameter of the actual resistance value R1 of the first foil type strain gauge to the integral alarm calculated value;
c2 is a second calculation compensation parameter of the actual resistance value R2 of the second foil type strain gauge to the integral alarm calculated value;
c3 is a third calculation compensation parameter of the actual resistance value R3 of the third foil type strain gauge to the integral alarm calculated value;
c4 is a fourth calculation compensation parameter of the actual resistance value R4 of the fourth foil type strain gauge to the integral alarm calculated value;
The value of the ith calculated compensation parameter is determined according to the absolute value Si of the difference between the actual resistance Ri of the ith foil-type strain gauge and the standard resistance R0i, and the larger the absolute value Si of the difference is, the larger the value of the ith calculated compensation parameter is;
And D is a calculation parameter of the fault/falling alarm level H and the whole alarm calculation value, wherein the numerical value of the calculation parameter D is determined according to the number n of the foil type strain gauges which have faults or fall off in all the foil type strain gauges.
Specifically, in this embodiment, according to the difference in the value of the number n, the value of the calculation parameter D is changed along with the difference, the value of the calculation parameter D is,
If the number n is 0, d=d1=1, and the central control module determines that all foil-type strain gauges do not have faults or fall off, so that false alarm conditions do not exist, and the integral alarm calculated value is not affected;
If the number n is 1, D=d2, the central control module substitutes D=d2 to calculate the whole alarm calculated value,
If F is more than or equal to F0, judging that the foil type strain gauge fails/falls off, and sending the integral alarm signal by the central control module; if F is less than F0, judging that the foil type strain gauge does not have faults or fall off, and determining that the sent fault/fall off alarm signal is false alarm;
If the number n is 2, D=d3, the central control module substitutes D=d3 to calculate the whole alarm calculated value, wherein d3=d1× (V/t), if F is more than or equal to F0, the two foil-type strain gauges are judged to be failed/fall off, and the central control module sends out the whole alarm signal; if F is less than F0, judging that the two foil-type strain gauges do not have faults/fall off, and determining that the sent fault/fall-off alarm signal is false alarm; wherein t is the out-of-tolerance time length of failure/falling of the two foil type strain gauges, and V is a constant parameter of the out-of-tolerance time length t to the calculated parameter D3;
if the number n is more than or equal to 3, d=d4= +++ and, the central control module judges that each abnormal foil type strain gauge has fault/falling-off condition, the central control module sends out an integral alarm signal;
Wherein D1 is more than D2 is more than D3 and less than D4.
According to the embodiment of the invention, the central control module is respectively connected with each foil type strain gauge and each temperature sensor, the deformation of the foil type strain gauge is caused by the displacement generated according to the relative vibration of the tower type oil pumping machine frame body, so that the actual resistance value of the foil type strain gauge is changed, the central control module judges whether the foil type strain gauge breaks down/falls off according to the comparison between each detection resistance value and a resistance fluctuation evaluation interval, and carries out fault/falling off alarm grade division, the detection resistance value of the foil type strain gauge is compensated and corrected according to the actual temperature value detected by the temperature sensor in real time, the integral alarm calculated value is calculated according to the corrected actual resistance value, whether the tower type oil pumping machine frame body is abnormally vibrated or not is judged, and an integral alarm signal is sent out, so that the device is stopped in time, and when the device senses the abnormal operation of the tower type oil pumping machine, the stoppage can be quickly protected, and the mechanical accidents are prevented, and the defects of high cost, complex analysis, difficult measurement and poor reliability in the prior monitoring technology are solved.
In the embodiment, the calculation formulas are used for intuitively reflecting the adjustment relation, such as positive correlation and negative correlation, among the values, and the parameter values of the non-specific limiting values are positive on the premise of no special description.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. An abnormality monitoring system of a tower type pumping unit is characterized by comprising a tower type pumping unit abnormality monitoring strain gauge type vibration sensor component and a central control module,
The tower type pumping unit abnormal monitoring strain gauge type vibration sensor assembly is installed in the following mode: the vertical position and the horizontal position of the 90-degree corner area of the tower type oil pumping machine frame body are respectively provided with an assembly of 1 group of strain gauge type vibration sensor assemblies;
the tower type pumping unit abnormality monitoring strain gauge type vibration sensor assembly comprises,
The plurality of foil type strain gages comprise a first foil type strain gage, a second foil type strain gage, a third foil type strain gage and a fourth foil type strain gage which are respectively stuck to the periphery of the inner side of the glass fiber reinforced plastic shell and are used for judging whether the tower type pumping unit vibrates abnormally or not according to the change of each resistance value when the tower type pumping unit frame body is mechanically deformed;
the temperature sensor is connected with the terminal of the socket through a wire and is used for detecting the real-time temperature inside the assembly; judging whether the internal temperature of the component has influence on the actual resistance value of each foil type strain gauge according to the detected actual temperature value;
the socket is arranged on the socket frame, and the terminal of the socket is connected with welding spots on the two groups of foil strain gauges through wires respectively; the socket frame is embedded into a first inner groove in the glass fiber reinforced plastic shell;
The central control module is respectively connected with the foil type strain gauges and the temperature sensors, the tower type oil pumping machine frame body generates displacement relative to vibration to cause deformation of each foil type strain gauge, so that the detection resistance value of each foil type strain gauge is changed, the central control module performs overall analysis according to the change of each detection resistance value, and the fault/shedding alarm level is divided according to the analysis result, so that the emergency degree of abnormal vibration of the whole tower type oil pumping machine frame body is judged, and corresponding fault/shedding alarm signals are sent out; compensating and correcting each detection resistance value of each foil type strain gauge according to the actual temperature value detected by the temperature sensor in real time, calculating an overall alarm calculation value according to each corrected actual resistance value, judging whether the fault/falling alarm signal is false alarm or not according to the number of the foil type strain gauges which are faulty/falling in the calculation process, judging whether the overall tower type oil pumping machine frame body has abnormal vibration or not, and judging whether the overall alarm signal is sent or not; the actual resistance value is the resistance value after compensation and correction of the detection resistance value;
The central control module is internally provided with a temperature difference evaluation value, when the actual temperature value detected by the temperature sensor is compared with a standard temperature value, the absolute value of the difference between the actual temperature value and the standard temperature value is calculated, whether the actual resistance value of the foil type strain gauges is influenced by the temperature is judged according to the relation between the absolute value of the difference and the temperature difference evaluation value, so as to determine whether the tower type pumping unit has abnormal vibration, if the absolute value of the difference is larger than the temperature difference evaluation value, the actual resistance value of each foil type strain gauge is influenced by the judging temperature, the central control module sends a correction signal to correct each detection resistance value,
The central control module is internally provided with the standard temperature value, and the standard temperature value is determined by the working environment temperature of the tower type pumping unit;
The central control module is internally provided with a standard resistance value R0i of the ith foil-type strain gauge, and calculates absolute values Si, si= |Ri-R0 i| of differences between the actual resistance value Ri of the ith foil-type strain gauge and the standard resistance value R0i according to the actual resistance value Ri of the ith foil-type strain gauge obtained after correction,
If Si is less than or equal to S0, judging that vibration abnormality does not occur at the position of the ith foil type strain gauge, and enabling the central control module not to send out an ith alarm signal;
If Si is more than S0, judging that vibration abnormality occurs at the position of the ith foil type strain gauge, and sending the ith alarm signal by the central control module;
S0 is a resistance difference evaluation value set in the central control module, and the standard resistance value is a resistance value without considering temperature influence;
The central control module is internally provided with an integral alarm evaluation value F0, the integral alarm calculation value F is calculated according to the actual resistance value of each foil type strain gauge, the calculation formula is as follows,
F＝[R1×c1+R2×c2+R3×c3+R4×c4]×D,
If F is more than or equal to F0, judging that the whole tower type oil pumping machine frame body has abnormal vibration, and sending out the whole alarm signal by the central control module;
If F is less than F0, judging that the whole tower type oil pumping machine frame body does not have abnormal vibration, wherein the central control module does not send out the whole alarm signal;
Wherein c1 is a first calculation compensation parameter of the actual resistance value R1 of the first foil type strain gauge to the integral alarm calculated value;
c2 is a second calculation compensation parameter of the actual resistance value R2 of the second foil type strain gauge to the integral alarm calculated value;
c3 is a third calculation compensation parameter of the actual resistance value R3 of the third foil type strain gauge to the integral alarm calculated value;
c4 is a fourth calculation compensation parameter of the actual resistance value R4 of the fourth foil type strain gauge to the integral alarm calculated value;
The value of the ith calculated compensation parameter is determined according to the absolute value Si of the difference between the actual resistance Ri of the ith foil-type strain gauge and the standard resistance R0i, and the larger the absolute value Si of the difference is, the larger the value of the ith calculated compensation parameter is;
D is a calculation parameter of the fault/falling off alarm level H for the whole alarm calculation value, and the numerical value of the calculation parameter D is determined according to the number n of the foil type strain gauges which have faults or fall off in all the foil type strain gauges;
according to the different values of the number n, the value of the calculated parameter D changes along with the value of the calculated parameter D, the value of the calculated parameter D is,
If the number n is 0, d=d1=1, and the central control module determines that all foil-type strain gauges do not have faults or fall off, so that false alarm conditions do not exist, and the integral alarm calculated value is not affected;
If the number n is 1, D=d2, the central control module substitutes D=d2 to calculate the whole alarm calculated value,
If F is more than or equal to F0, judging that the foil type strain gauge fails/falls off, and sending the integral alarm signal by the central control module; if F is less than F0, judging that the foil type strain gauge does not have faults or fall off, and determining that the sent fault/fall off alarm signal is false alarm;
If the number n is 2, D=d3, the central control module substitutes D=d3 to calculate the whole alarm calculated value, wherein d3=d1× (V/t), if F is more than or equal to F0, the two foil-type strain gauges are judged to be failed/fall off, and the central control module sends out the whole alarm signal; if F is less than F0, judging that the two foil-type strain gauges do not have faults/fall off, and determining that the sent fault/fall-off alarm signal is false alarm; wherein t is the out-of-tolerance time length of failure/falling of the two foil type strain gauges, and V is a constant parameter of the out-of-tolerance time length t to the calculated parameter D3;
if the number n is more than or equal to 3, d=d4= +++ and, the central control module judges that each abnormal foil type strain gauge has fault/falling-off condition, the central control module sends out an integral alarm signal;
Wherein D1 is more than D2 is more than D3 and less than D4.
2. The anomaly monitoring system of a tower pumping unit according to claim 1, wherein the central control module determines a failure/drop alarm level H, h=0, 1,2,3 according to the number n of failed/dropped foil-type strain gauges, n=0, 1,2,3,4,
If n=0, the central control module judges that the failure/falling alarm level H=0, all foil type strain gauges do not fail or fall off, and no failure/falling alarm signal is sent;
If n=1, the central control module judges the failure/falling off alarm level h=1, sends out a failure/falling off alarm signal, and further analyzes the failure/falling off condition of the foil type strain gauge to determine whether the failure/falling off condition is false;
If n=2, the central control module judges the failure/falling off alarm level H=2, sends out a failure/falling off alarm signal, and further analyzes the out-of-tolerance time t when each abnormal foil type strain gauge fails/falls off to determine whether the failure/falling off alarm signal is false;
If n=3, the central control module judges that the failure/falling alarm level h=3, and the central control module judges that the failure/falling situation of each abnormal foil type strain gauge is true, and sends out a failure/falling alarm signal.
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