CN110082439B - Intelligent inspection storage device for verification of on-site oil chromatography on-line monitoring device - Google Patents
Intelligent inspection storage device for verification of on-site oil chromatography on-line monitoring device Download PDFInfo
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- CN110082439B CN110082439B CN201910281677.XA CN201910281677A CN110082439B CN 110082439 B CN110082439 B CN 110082439B CN 201910281677 A CN201910281677 A CN 201910281677A CN 110082439 B CN110082439 B CN 110082439B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 23
- 238000004587 chromatography analysis Methods 0.000 title claims abstract description 21
- 238000012795 verification Methods 0.000 title claims abstract description 16
- 238000007689 inspection Methods 0.000 title claims description 3
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 239000003921 oil Substances 0.000 claims description 249
- 230000001105 regulatory effect Effects 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 25
- 238000006073 displacement reaction Methods 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 9
- 125000004122 cyclic group Chemical group 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 claims description 6
- 238000003786 synthesis reaction Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- 239000010779 crude oil Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims 9
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8665—Signal analysis for calibrating the measuring apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/027—Liquid chromatography
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Abstract
The invention belongs to the technical field of online monitoring and detection, and particularly relates to detection by an online monitoring device for transformer oil chromatography. In particular to an intelligent checking and storing device for on-site oil chromatography on-line monitoring device verification. The automatic control system with the Cortex-A8 processor of the ARM7 framework as a core and the oil circuit circulation structure, wherein the speed of the Cortex-A8 processor is in the range from 600MHz to more than 1GHz, and the automatic control system is suitable for the use requirements of mobile equipment. The automatic control system is used for storing the sample by controlling an independent piston, and the physical environment inside the cavity ensures the stability of the concentration of the oil sample; the circulating detection mode and the non-circulating detection mode greatly reduce the weight of the whole machine, and are convenient for carrying and detecting on site. The oil chromatograph on-line monitoring device is suitable for oil chromatograph on-line monitoring devices of various structural model manufacturers, can automatically adjust the oil level and automatically circulate, can reintegrate the escaping gas into the oil, and is suitable for various on-site verification.
Description
Technical Field
The invention belongs to the technical field of online monitoring and detection, and particularly relates to detection by an online monitoring device for transformer oil chromatography. In particular to an intelligent checking and storing device for on-site oil chromatography on-line monitoring device verification.
Background
The on-line monitoring device for the transformer oil chromatography in field operation needs to detect regularly, however, the existing detection equipment is large in size, small in oil storage quantity and heavy in mass, is unfavorable for carrying on site, is used for field detection, is an open oil bag, can only store for a short time, and changes in concentration after being transported on site.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides an intelligent checking and storing device for checking an on-site oil chromatography on-line monitoring device, and aims to provide the intelligent checking and storing device which is light and convenient, can realize functions of automatically adjusting oil level, automatically circulating and the like, and can check the on-site running oil chromatography on-line monitoring device.
In order to achieve the above object, the present invention is achieved by the following technical scheme:
An intelligent checking and storing device for detecting an on-site oil chromatography on-line monitoring device comprises an automatic control system taking a Cortex-A8 processor of an ARM7 framework as a core and an oil circuit circulation structure; the piston cavity A is connected with the electromagnetic valve F1 through a pipeline and a joint, and the other side of the electromagnetic valve F1 is connected with an air pump through a pipeline; the piston cavity A is connected with the pressure sensor E, and the pressure sensor E is in direct contact with oil at the bottom of the oil cavity; the electromagnetic valve F3 of the piston cavity A is connected through a pipeline, an oil inlet is arranged on the other side of the electromagnetic valve F3, and the oil inlet is connected with a device to be detected; the piston cavity A is connected with the electromagnetic valve F2 through a pipeline, and a first connector of the three-way electromagnetic valve on the electromagnetic valve F2 is connected with a connector at the upper part of the piston cavity A through a pipeline and is directly communicated with the bottom oil cavity; the second connector of the three-way electromagnetic valve on the three-way electromagnetic valve is connected with a connector on the side wall of the piston cavity A and is connected to the upper part of the oil cavity; the third port of the three-way electromagnetic valve is connected with an oil return port through a pipeline and is connected with a detected device through the oil return port to be used as an oil return path; the oil inlet end and the oil outlet end of the piston cavity A and the circulating speed regulating pump C are respectively connected by pipelines to form a loop; the piston shaft of the piston chamber a is connected with a displacement sensor D.
The electromagnetic valve F2 is a three-way electromagnetic valve, and can switch directions, and comprises three interfaces, namely a three-way electromagnetic valve first interface, a three-way electromagnetic valve second interface and a three-way electromagnetic valve third interface; the three-way electromagnetic valve can switch between two modes, namely that only the first interface of the three-way electromagnetic valve is conducted, and that only the second interface of the three-way electromagnetic valve is conducted.
The piston cavity A is connected with the pressure sensor E through a fixing bolt and a sealing ring.
The oil inlet end and the oil outlet end of the piston cavity A and the circulating speed regulating pump C are respectively connected through pipelines, the oil inlet end of the circulating speed regulating pump C is connected to a first interface of a three-way electromagnetic valve of the piston and the electromagnetic valve F2, the three-way valve is connected to a joint at the upper part of the piston cavity A, the oil outlet end of the circulating speed regulating pump C is connected to the bottom of an oil cavity to form a loop, and oil in the cavity at the bottom is circulated when the circulating speed regulating pump C is started.
The piston shaft of the piston chamber A is connected with a displacement sensor D, and the displacement sensor D returns a signal when the piston moves.
The pressure sensor E is in direct contact with oil at the bottom of the oil cavity, detects the pressure value at the bottom of the oil cavity in real time, and feeds back the pressure value to the central processing unit Z.
The Cortex-A8 processor of ARM7 framework is the automatic control system and the oil circuit circulation structure of core, and wherein automatic control system includes: the device comprises a central processing part, an oil sample storage part, an oil sample circulation part, a sensor part and an oil way control part; the central processing unit Z receives the feedback signal of the sensor part, and the user control command carries out closed-loop control on the electromagnetic valve F and the air pump of the oil circuit circulation part; the oil circuit circulation means: the piston cavity, the electromagnetic valve, the circulating speed regulating pump C and the oil pipe are connected, the part connected with the central processing unit is an electric control part, and other connecting lines are connected through oil paths.
The circulating speed regulating pump C is a circulating pump with adjustable direction and is used for circulating the inside of an oil path, so that the oil in the cavity flows out from the upper part and flows in from the lower part.
The specific structure of the electric control part is as follows: the central processing unit Z is respectively connected with the electromagnetic valve F1, the electromagnetic valve F2, the electromagnetic valve F3, the pressure sensor E, the air pump B, the circulating speed regulating pump C and the displacement sensor D in a star connection mode, and the acquisition of signals of the displacement and the pressure sensor and the control of each electromagnetic valve, the circulating pump and the air pump are realized.
The device comprises a cyclic detection mode and a non-cyclic detection mode;
The oil sample storage part adopts a unique piston type structure, the oil chamber is divided into an upper part and a lower part, the two parts are sealed, the center of a supporting shaft of a piston partition plate is connected with the lower part of the oil chamber, in a circulating working mode, oil flows out from a lower electromagnetic valve F3, and therefore the supporting shaft returns to the oil chamber, the circulating mode is suitable for the condition that the volume of the oil is unchanged, the concentration is deaerated due to the detection equipment, and the concentration is slightly reduced in the detection; the upper part of the oil cavity is used for non-circulating operation and pressure control, the standard oil concentration of a non-circulating operation mode is unchanged, and the detected oil flows into the upper part of the cavity and is not mixed with a sample;
The circulating part of the oil sample adopts a circulating speed regulating pump C, so that oil and gas in an oil chamber can be fully mixed, the stability of the gas content in the oil is ensured, and the storage time is prolonged; the whole system is in a closed condition during storage to ensure the stability of sample conditions;
the flow of the automatic control system taking ARM7 as a core comprises the following steps:
Oil feeding: before the oil sample is stored, the nitrogen-oxygen synthesis gas is used for cleaning an upper oil chamber and a lower oil chamber, when oil inlet is started, oil enters from an oil outlet, an oil return port is empty firstly, an electromagnetic valve F3 is opened at the moment, an electromagnetic valve F2 is in a mode of opening a first port of a three-way electromagnetic valve to be communicated with a third port of the three-way electromagnetic valve, a second port of the three-way electromagnetic valve is closed, the electromagnetic valve F1 is opened, and an air pump B does not work; when the oil return port has no bubbles, switching the state of the electromagnetic valve F2, opening a mode of communicating the second port of the three-way electromagnetic valve with the third port of the three-way electromagnetic valve, and closing the first port of the three-way electromagnetic valve; at the moment, the oil can push the piston, and when the displacement sensor detects that the upper limit is reached, the oil is stored, and the oil inlet is stopped; when the pressure sensor E detects that the pressure reaches 0.2Mpa, the air pump B is stopped, the electromagnetic valve F1 is closed, and the pressure in the oil chamber is ensured to be stable;
and (3) circulation: when the storage equipment is transported to the site, the storage equipment circulates before detection, and a small amount of overflowed bubbles are mixed into oil by circulating in the direction opposite to the direction when the oil way runs, so that the concentration of dissolved gas of an oil sample is ensured to be consistent with the standard concentration prepared in a laboratory;
And (3) detecting a cyclic operation mode: after the pipeline is connected on site, a user clicks a control screen, and when a circulating operation command is started, the operation of the circulating speed regulating pump C is stopped, the electromagnetic valve F3 and the electromagnetic valve F2 are opened, and a mode that a first port of the three-way electromagnetic valve is communicated with a third port of the three-way electromagnetic valve is opened; the electromagnetic valve F1 and the air pump control and regulate the upper gas pressure on the piston according to the feedback signal of the pressure sensor, so as to ensure the stability of the physical environment in the oil chamber; the circulating mode detection is suitable for the sites with low concentration change requirement and long-time operation detection requirement;
And (3) detecting a non-circulating operation mode: after the pipeline is connected on site, a user clicks a control screen, and when a non-circulating operation command is started, the operation of the circulating speed regulating pump C is stopped, the electromagnetic valve F3 and the electromagnetic valve F2 are opened, and a mode that a second port of the three-way electromagnetic valve is communicated with a third port of the three-way electromagnetic valve is opened; detecting that the degassed oil enters the upper part of the oil cavity through the electromagnetic valve F2 and is not mixed with the crude oil sample, so as to ensure the concentration of the oil sample, and controlling the pressure through the electromagnetic valve F1 and the air pump; the non-circulation mode detection is suitable for the sites with high concentration change requirement and long-time detection is not required;
Oil discharge: when a user clicks a central control screen and starts to discharge oil, opening the electromagnetic valve F3 and pressurizing the air pump B to discharge oil at the lower part of the oil chamber, when the displacement sensor D detects the oil level 0, stopping pressurizing, connecting the oil outlet with nitrogen-oxygen synthesis gas for cleaning, and clicking to continue, wherein the electromagnetic valve F1 is closed to open a mode that a second port of a three-way electromagnetic valve of the electromagnetic valve F2 is communicated with a third port of the three-way electromagnetic valve, so that the upper oil is discharged; when the displacement sensor D detects that the upper part reaches the maximum value for 10 seconds, a mode of opening the first port of the three-way electromagnetic valve and the third port of the three-way electromagnetic valve of the electromagnetic valve F2 is opened, the gas cleaning oil chamber is used for discharging internal gas, after a certain time, the electromagnetic valve F2 is closed, the electromagnetic valve F1 is opened, and the air pump pushes the piston to the oil level of 0, so that the oil discharging process is completed.
The invention has the advantages and beneficial effects that:
the intelligent verification storage device can store samples by controlling the independent pistons, ensures the stable concentration of the oil samples in the physical environment in the cavity, is provided with a circulation type detection mode and a non-circulation type detection mode which are ingenious in design, can greatly reduce the weight of the whole machine, and is convenient for carrying and detecting on site. The device is suitable for detection of oil chromatography on-line monitoring devices of various structural model manufacturers. The oil level can be automatically regulated, the automatic circulation function can be realized, and the escaping gas can be re-mixed into the oil, so that the oil level automatic circulating system is suitable for various on-site verification.
Drawings
In order to facilitate the understanding and practice of the invention, those of ordinary skill in the art will now make further details with reference to the drawings and detailed description, it being understood that the scope of the invention is not limited to the specific description.
FIG. 1 is a schematic diagram of an automatic control system of an oil reservoir according to the present invention;
Fig. 2 is a schematic diagram of the structure of the oil storage device of the present invention.
In the figure: the device comprises a piston cavity A, an air pump B, a circulating speed regulating pump C, a displacement sensor D, a pressure sensor E, a central processing unit Z, a two-way electromagnetic valve F1, a three-way electromagnetic valve F2, a three-way electromagnetic valve first interface 1, a three-way electromagnetic valve second interface 2, a three-way electromagnetic valve third interface 3 and a two-way electromagnetic valve F3.
Detailed Description
The invention relates to an intelligent checking and storing device for detecting an on-site oil chromatography on-line monitoring device, which adopts an automatic control system with an ARM7 framework Cortex-A8 processor as a core and a special oil circuit circulation structure, and the ARM7 core chip has the characteristics of extremely high developable performance and extremely good power efficiency. The speed of the Cortex-A8 processor is in the range from 600MHz to over 1GHz, and the Cortex-A8 processor is suitable for the use requirement of mobile equipment. The automatic control system is used for storing the sample by controlling the independent piston, and the physical environment inside the cavity ensures the stability of the concentration of the oil sample.
As shown in fig. 1, the automatic control system according to the present invention includes: the device comprises a central processing part, an oil sample storage part, an oil sample circulation part, a sensor part and an oil way control part. The central processor Z receives the feedback signal from the sensor part, and the user control command performs closed-loop control on the electromagnetic valve and the air pump of the oil circuit circulation part, so that the stability of the physical environment in the oil chamber is ensured.
The special oil circuit circulation structure refers to: the piston cavity, the electromagnetic valve, the circulating speed regulating pump C and the oil pipe are connected. The part connected with the central processing unit is an electric control part, and other connecting lines are oil ways.
The circulating speed regulating pump C is a circulating pump with adjustable direction and is used for circulating the inside of an oil path, so that the oil in the cavity flows out from the upper part and flows in from the lower part.
The central processing unit Z is connected with the air pump, the circulating pump, the electromagnetic valve and the sensor to form an electric control part, and other connecting lines are oil path parts.
As shown in fig. 2, fig. 2 is a schematic structural diagram of the oil storage device of the present invention. The oil passage structure connection portion of the present invention is as follows:
the piston cavity A and the electromagnetic valve F1 are connected with the connector through a stainless steel pipe, and the connecting part is fastened and has good air tightness. The other port of the electromagnetic valve F1 is also connected with the air pump B by using a pipeline, and the pressure change at the upper part of the oil cavity is realized by controlling the opening and closing of the electromagnetic valve F1 and the forward rotation and the reverse rotation of the air pump B, so that the piston is pushed to act.
The electromagnetic valve F1 and the electromagnetic valve F3 are two-way electromagnetic valves, and the electromagnetic valve F2 is a three-way electromagnetic valve.
The piston cavity A is connected with the pressure sensor E through a fixing bolt and a sealing ring, the pressure sensor E can be in direct contact with oil at the bottom of the piston cavity A, the pressure value at the bottom of the oil cavity can be detected in real time, and the pressure value is fed back to the central processing unit Z.
The electromagnetic valve F3 of the piston cavity A is connected through a pipeline, an oil inlet is arranged on the other side of the electromagnetic valve F3, and the oil inlet is connected with a device to be detected.
The piston cavity A is also connected with the electromagnetic valve F2 through a pipeline, the electromagnetic valve F2 is a three-way electromagnetic valve, the three-way electromagnetic valve can switch two modes of switching on only the first interface 1 of the three-way electromagnetic valve to the third interface 3 of the three-way electromagnetic valve and switching on only the second interface 2 of the three-way electromagnetic valve to the third interface 3 of the three-way electromagnetic valve, and the first interface 1 of the three-way electromagnetic valve is connected with the upper joint of the piston cavity A through a pipeline and is directly communicated with the bottom oil cavity; the second connector 2 of the three-way electromagnetic valve is connected with a connector on the side wall of the piston cavity A and is connected with the upper part of the oil cavity; the third port 3 of the three-way electromagnetic valve is connected with an oil return port through a pipeline and is connected with a device to be detected through the oil return port to serve as an oil return path.
The oil inlet end and the oil outlet end of the piston cavity A and the circulating speed regulating pump C are respectively connected through pipelines, the oil inlet end of the circulating speed regulating pump C is connected to a first connector 1 of a three-way electromagnetic valve of the piston and the electromagnetic valve F2, the three-way valve is connected to a connector on the upper part of the piston cavity A, the oil outlet end of the circulating speed regulating pump C is connected to the bottom of an oil cavity to form a loop, and oil in the cavity at the bottom is circulated when the circulating speed regulating pump C is started.
The piston shaft of the piston chamber a is connected to a displacement sensor D which returns a signal when the piston moves.
The sensor portion includes: a pressure sensor E and a displacement sensor D.
The solenoid valve includes: solenoid valve F1, solenoid valve F2 and solenoid valve F3.
The electromagnetic valve F2 is a three-way electromagnetic valve, and can switch directions, and comprises three interfaces, namely a three-way electromagnetic valve first interface 1, a three-way electromagnetic valve second interface 2 and a three-way electromagnetic valve third interface 3.
As shown in fig. 1 and 2, the specific structure of the electrical control part of the present invention is as follows:
The central processing unit Z is respectively connected with the electromagnetic valve F1, the electromagnetic valve F2, the electromagnetic valve F3, the pressure sensor E, the air pump B, the circulating speed regulating pump C and the displacement sensor D in an electric connection mode, and as shown in the figure, the connection is in star connection, so that the acquisition of signals of the displacement and the pressure sensor and the control of each electromagnetic valve, the circulating pump and the air pump are realized.
The device is provided with a cyclic detection mode and a non-cyclic detection mode.
The oil sample storage part adopts a unique piston type structure, the oil chamber is divided into an upper part and a lower part, the two parts are sealed, the center of a supporting shaft of a piston partition plate is connected with the lower part of the oil chamber, oil flows out from a lower electromagnetic valve F3 in a circulating working mode, the supporting shaft returns to the oil chamber, the circulating mode is suitable for the oil with unchanged volume, the concentration is deaerated due to the detected equipment, and the concentration is slightly reduced in the detection. The upper part of the oil cavity is used for non-circulating operation and pressure control, the standard oil concentration of a non-circulating operation mode is unchanged, and the detected oil flows into the upper part of the cavity and is not mixed with a sample.
The circulating part of the oil sample adopts the circulating speed regulating pump C to fully mix oil and gas in the oil chamber, ensure the stability of the gas content in the oil and prolong the storage time. The whole system is in a sealed condition during storage, so that the stability of sample conditions is ensured.
The specific structure of the automatic control system is shown in fig. 1, and the detailed flow comprises the following steps:
Oil feeding: before the oil sample is stored, the nitrogen-oxygen synthesis gas is used for cleaning the upper oil chamber and the lower oil chamber, when oil inlet is started, oil enters from an oil outlet in the figure, an oil return port is empty firstly, an electromagnetic valve F3 is opened at the moment, the electromagnetic valve F2 is in a mode of opening the communication between a first port 1 of the three-way electromagnetic valve and a third port 3 of the three-way electromagnetic valve, the second port 2 of the three-way electromagnetic valve is closed, the electromagnetic valve F1 is opened, and an air pump B does not work. When the oil return port has no bubbles, the state of the electromagnetic valve F2 is switched, the mode that the second port 2 of the three-way electromagnetic valve is communicated with the third port 3 of the three-way electromagnetic valve is opened, and the first port 1 of the three-way electromagnetic valve is closed. At this time, the oil can push the piston, and when the displacement sensor detects that the upper limit is reached, the oil is stored, and the oil inlet is stopped. When the pressure sensor E detects that the pressure reaches 0.2Mpa, the air pump B is stopped, the electromagnetic valve F1 is closed, and the pressure in the oil chamber is ensured to be stable.
And (3) circulation: when the storage equipment is transported to the site, the storage equipment circulates before detection, circulates in the direction opposite to the oil way, mixes a small amount of overflowed bubbles into oil, ensures the concentration of dissolved gas of an oil sample, is consistent with the standard concentration distributed in a laboratory, and improves the detection efficiency.
And (3) detecting a cyclic operation mode: after the pipeline is connected on site, a user clicks a control screen, and when a circulating operation command is started, the operation of the circulating speed regulating pump C is stopped, the electromagnetic valve F3 and the electromagnetic valve F2 are opened, and the mode that the first port 1 of the three-way electromagnetic valve is communicated with the third port 3 of the three-way electromagnetic valve is opened. The electromagnetic valve F1 and the air pump control and regulate the upper gas pressure on the piston according to the feedback signal of the pressure sensor, so as to ensure the stable physical environment inside the oil chamber. The circulating mode detection is suitable for the sites with low concentration change requirement and long-time operation detection requirement.
And (3) detecting a non-circulating operation mode: after the pipeline is connected on site, a user clicks a control screen, and when a non-circulating operation command is started, the operation of the circulating speed regulating pump C is stopped, the electromagnetic valve F3 and the electromagnetic valve F2 are opened, and the mode that the second port 2 of the three-way electromagnetic valve is communicated with the third port 3 of the three-way electromagnetic valve is opened. The deaerated oil is detected to enter the upper part of the oil cavity through the electromagnetic valve F2, and is not mixed with the crude oil sample, so that the concentration of the oil sample is ensured, and the pressure is controlled through the electromagnetic valve F1 and the air pump. The non-circulation mode detection is suitable for the sites with high concentration change requirement and no long-time detection requirement.
Oil discharge: when the user clicks the central control screen and starts to discharge oil, the electromagnetic valve F3 and the air pump B are opened to discharge oil at the lower part of the oil chamber, when the displacement sensor D detects the oil level 0, the pressurization is stopped, the oil outlet is connected with the nitrogen-oxygen synthesis gas for cleaning, the clicking is continued, and at the moment, the electromagnetic valve F1 is closed to open a mode that the three-way electromagnetic valve second interface of the electromagnetic valve F2 is communicated with the three-way electromagnetic valve third interface 3, so that the upper oil is discharged. When the displacement sensor detects that the upper part reaches the maximum value for 10 seconds, a mode of opening the first port 1 of the three-way electromagnetic valve and the third port 3 of the three-way electromagnetic valve of the electromagnetic valve F2 is opened, the gas cleaning oil chamber is used for discharging internal gas, after a certain time, the electromagnetic valve F2 is closed, the electromagnetic valve F1 is opened, and the air pump pushes the piston to 0 oil level, so that the oil discharging process is completed.
Claims (9)
1. An intelligent inspection storage device for on-site oil chromatography on-line monitoring device verification is characterized in that: the device comprises an automatic control system with an ARM7 framework Cortex-A8 processor as a core and an oil circuit circulation structure; the piston cavity A is connected with the electromagnetic valve F1 through a pipeline and a joint, and the other side of the electromagnetic valve F1 is connected with an air pump through a pipeline; the piston cavity A is connected with the pressure sensor E, and the pressure sensor E is in direct contact with oil at the bottom of the oil cavity; the electromagnetic valve F3 of the piston cavity A is connected through a pipeline, an oil inlet is arranged on the other side of the electromagnetic valve F3, and the oil inlet is connected with a device to be detected; the piston cavity A is connected with the electromagnetic valve F2 through a pipeline, and a first connector of the three-way electromagnetic valve on the electromagnetic valve F2 is connected with a connector at the upper part of the piston cavity A through a pipeline and is directly communicated with the bottom oil cavity; the second connector of the three-way electromagnetic valve on the three-way electromagnetic valve is connected with a connector on the side wall of the piston cavity A and is connected to the upper part of the oil cavity; the third port of the three-way electromagnetic valve is connected with an oil return port through a pipeline and is connected with a detected device through the oil return port to be used as an oil return path; the oil inlet end and the oil outlet end of the piston cavity A and the circulating speed regulating pump C are respectively connected by pipelines to form a loop; the piston shaft of the piston cavity A is connected with the displacement sensor D; including a cyclic detection mode and a non-cyclic detection mode; the oil sample storage part adopts a unique piston type structure, the oil chamber is divided into an upper part and a lower part, the two parts are sealed, the center of a supporting shaft of a piston partition plate is connected with the lower part of the oil chamber, in a circulating working mode, oil flows out from a lower electromagnetic valve F3, and therefore the supporting shaft returns to the oil chamber, the circulating mode is suitable for the condition that the volume of the oil is unchanged, the concentration is deaerated due to the detection equipment, and the concentration is slightly reduced in the detection; the upper part of the oil cavity is used for non-circulating operation and pressure control, the standard oil concentration of a non-circulating operation mode is unchanged, and the detected oil flows into the upper part of the cavity and is not mixed with a sample; the circulating part of the oil sample adopts a circulating speed regulating pump C, so that oil and gas in an oil chamber can be fully mixed, the stability of the gas content in the oil is ensured, and the storage time is prolonged; the whole system is in a closed condition during storage to ensure the stability of sample conditions;
the flow of the automatic control system taking ARM7 as a core comprises the following steps:
Oil feeding: before the oil sample is stored, the nitrogen-oxygen synthesis gas is used for cleaning an upper oil chamber and a lower oil chamber, when oil inlet is started, oil enters from an oil outlet, an oil return port is empty firstly, an electromagnetic valve F3 is opened at the moment, an electromagnetic valve F2 is in a mode of opening a first port of a three-way electromagnetic valve to be communicated with a third port of the three-way electromagnetic valve, a second port of the three-way electromagnetic valve is closed, the electromagnetic valve F1 is opened, and an air pump B does not work; when the oil return port has no bubbles, switching the state of the electromagnetic valve F2, opening a mode of communicating the second port of the three-way electromagnetic valve with the third port of the three-way electromagnetic valve, and closing the first port of the three-way electromagnetic valve; at the moment, the oil can push the piston, and when the displacement sensor detects that the upper limit is reached, the oil is stored, and the oil inlet is stopped; when the pressure sensor E detects that the pressure reaches 0.2Mpa, the air pump B is stopped, the electromagnetic valve F1 is closed, and the pressure in the oil chamber is ensured to be stable;
and (3) circulation: when the storage equipment is transported to the site, the storage equipment circulates before detection, and a small amount of overflowed bubbles are mixed into oil by circulating in the direction opposite to the direction when the oil way runs, so that the concentration of dissolved gas of an oil sample is ensured to be consistent with the standard concentration prepared in a laboratory;
And (3) detecting a cyclic operation mode: after the pipeline is connected on site, a user clicks a control screen, and when a circulating operation command is started, the operation of the circulating speed regulating pump C is stopped, the electromagnetic valve F3 and the electromagnetic valve F2 are opened, and a mode that a first port of the three-way electromagnetic valve is communicated with a third port of the three-way electromagnetic valve is opened; the electromagnetic valve F1 and the air pump control and regulate the upper gas pressure on the piston according to the feedback signal of the pressure sensor, so as to ensure the stability of the physical environment in the oil chamber; the circulating mode detection is suitable for the sites with low concentration change requirement and long-time operation detection requirement;
And (3) detecting a non-circulating operation mode: after the pipeline is connected on site, a user clicks a control screen, and when a non-circulating operation command is started, the operation of the circulating speed regulating pump C is stopped, the electromagnetic valve F3 and the electromagnetic valve F2 are opened, and a mode that a second port of the three-way electromagnetic valve is communicated with a third port of the three-way electromagnetic valve is opened; detecting that the degassed oil enters the upper part of the oil cavity through the electromagnetic valve F2 and is not mixed with the crude oil sample, so as to ensure the concentration of the oil sample, and controlling the pressure through the electromagnetic valve F1 and the air pump; the non-circulation mode detection is suitable for the sites with high concentration change requirement and long-time detection is not required;
Oil discharge: when a user clicks a central control screen and starts to discharge oil, opening the electromagnetic valve F3 and pressurizing the air pump B to discharge oil at the lower part of the oil chamber, when the displacement sensor D detects the oil level 0, stopping pressurizing, connecting the oil outlet with nitrogen-oxygen synthesis gas for cleaning, and clicking to continue, wherein the electromagnetic valve F1 is closed to open a mode that a second port of a three-way electromagnetic valve of the electromagnetic valve F2 is communicated with a third port of the three-way electromagnetic valve, so that the upper oil is discharged; when the displacement sensor D detects that the upper part reaches the maximum value for 10 seconds, a mode of opening the first port of the three-way electromagnetic valve and the third port of the three-way electromagnetic valve of the electromagnetic valve F2 is opened, the gas cleaning oil chamber is used for discharging internal gas, after a certain time, the electromagnetic valve F2 is closed, the electromagnetic valve F1 is opened, and the air pump pushes the piston to the oil level of 0, so that the oil discharging process is completed.
2. An intelligent test storage device for on-site oil chromatography on-line monitoring device verification as claimed in claim 1, wherein: the electromagnetic valve F2 is a three-way electromagnetic valve, and can switch directions, and comprises three interfaces, namely a three-way electromagnetic valve first interface, a three-way electromagnetic valve second interface and a three-way electromagnetic valve third interface; the three-way electromagnetic valve can switch between two modes, namely that only the first interface of the three-way electromagnetic valve is conducted, and that only the second interface of the three-way electromagnetic valve is conducted.
3. An intelligent test storage device for on-site oil chromatography on-line monitoring device verification as claimed in claim 1, wherein: the piston cavity A is connected with the pressure sensor E through a fixing bolt and a sealing ring.
4. An intelligent test storage device for on-site oil chromatography on-line monitoring device verification as claimed in claim 1, wherein: the oil inlet end and the oil outlet end of the piston cavity A and the circulating speed regulating pump C are respectively connected through pipelines, the oil inlet end of the circulating speed regulating pump C is connected to a first interface of a three-way electromagnetic valve of the piston and the electromagnetic valve F2, the three-way valve is connected to a joint at the upper part of the piston cavity A, the oil outlet end of the circulating speed regulating pump C is connected to the bottom of an oil cavity to form a loop, and oil in the cavity at the bottom is circulated when the circulating speed regulating pump C is started.
5. An intelligent test storage device for on-site oil chromatography on-line monitoring device verification as claimed in claim 1, wherein: the piston shaft of the piston chamber A is connected with a displacement sensor D, and the displacement sensor D returns a signal when the piston moves.
6. An intelligent test storage device for on-site oil chromatography on-line monitoring device verification as claimed in claim 1, wherein: the pressure sensor E is in direct contact with oil at the bottom of the oil cavity, detects the pressure value at the bottom of the oil cavity in real time, and feeds back the pressure value to the central processing unit Z.
7. An intelligent test storage device for on-site oil chromatography on-line monitoring device verification as claimed in claim 1, wherein: the Cortex-A8 processor of ARM7 framework is the automatic control system and the oil circuit circulation structure of core, and wherein automatic control system includes: the device comprises a central processing part, an oil sample storage part, an oil sample circulation part, a sensor part and an oil way control part; the central processing unit Z receives the feedback signal of the sensor part, and the user control command carries out closed-loop control on the electromagnetic valve F and the air pump of the oil circuit circulation part; the oil circuit circulation means: the piston cavity, the electromagnetic valve, the circulating speed regulating pump C and the oil pipe are connected, the part connected with the central processing unit is an electric control part, and other connecting lines are connected through oil paths.
8. An intelligent test storage device for on-site oil chromatography on-line monitoring device verification as claimed in claim 1, wherein: the circulating speed regulating pump C is a circulating pump with adjustable direction and is used for circulating the inside of an oil path, so that the oil in the cavity flows out from the upper part and flows in from the lower part.
9. The intelligent test storage device for on-site oil chromatography on-line monitoring device verification according to claim 7, wherein the intelligent test storage device is characterized in that: the specific structure of the electric control part is as follows: the central processing unit Z is respectively connected with the electromagnetic valve F1, the electromagnetic valve F2, the electromagnetic valve F3, the pressure sensor E, the air pump B, the circulating speed regulating pump C and the displacement sensor D in a star connection mode, and the acquisition of signals of the displacement and the pressure sensor and the control of each electromagnetic valve, the circulating pump and the air pump are realized.
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| CN113624852B (en) * | 2021-08-06 | 2024-04-30 | 国网新疆电力有限公司超高压分公司 | Online oil discharge and collection device for oil chromatography |
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