CN217820115U - Device for determining cloud point of petroleum product - Google Patents
Device for determining cloud point of petroleum product Download PDFInfo
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- CN217820115U CN217820115U CN202221302914.XU CN202221302914U CN217820115U CN 217820115 U CN217820115 U CN 217820115U CN 202221302914 U CN202221302914 U CN 202221302914U CN 217820115 U CN217820115 U CN 217820115U
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Abstract
The utility model relates to a device for petroleum product cloud point survey, its characterized in that: set up sample entry and sample export on the sample cell respectively, the top of sample cell sets up signal acquisition and control system, the symmetry sets up light source generator and photoelectric converter on the lateral wall of sample cell, the outer wall of sample cell sets up temperature sensor, the bottom and the semiconductor refrigeration unit of sample cell are connected, supply the sample liquid cooling in the sample cell, the bottom of semiconductor refrigeration unit sets up the fin, supplies the heat dissipation, the utility model discloses a photoelectric detection unit real-time supervision sample liquid muddy condition cooperates temperature monitoring unit and temperature control unit, and automatic judgement cloud point need not artifical the participation, realizes the testing process full automatization.
Description
Technical Field
The utility model relates to a device for petroleum product cloud point survey.
Background
The cloud point index is used for evaluating the low-temperature service performance of the oil product and preventing accidents caused by oil supply interruption due to blockage of a filter or an oil filter screen of an oil supply system. A higher cloud point (. Degree. C.) indicates a poorer low temperature performance of the oil and a higher use temperature.
At present, the cloud point index of petroleum products is mainly determined according to GB/T6986-2014 cloud point determination method, and the standard provides two determination modes (an automatic method and a manual method), wherein the manual method is an arbitration method.
In the standard detection method, a sample is contained in a flat-bottom glass test tube, the total amount of the sample to be tested is about 45ml (about 30ml in an automatic method), a refrigeration unit adopts cold bath circulation refrigeration, in order to ensure the cold bath uniformity of temperature, a cold bath pool with enough volume is adopted, and different types of coolants are placed in the cold bath pool according to the cooling temperature to form a multi-stage cold bath sleeve. Wherein, the manual method adopts a partial immersion type glass thermometer and a full immersion type glass thermometer, and the numerical value is read manually.
According to the method, multiple stages of cold bath sleeves are required to be arranged according to the range of the cloud point temperature, so that the monitoring of samples with different cloud points can be adapted. In addition, different cooling bath jackets (different cooling bath jackets are different in the type of coolant). Before the cloud point appears, the sample to be detected needs to be graded and cooled according to unit scales (for example: every 1 ℃), and the sample test tube is taken out from the cold bath sleeve to observe the crystallization (turbidity) condition at the bottom. The automatic method, while using optical devices instead of manual monitoring of the crystallization state, also requires switching between cold bath enclosures of different temperature levels until the cloud point occurs.
The coolant is flammable, volatile or toxic, corrosive. The requirement on the using operation process is high.
In summary, the main problems and disadvantages of the standard detection methods are:
1. the sample amount required for analysis and detection is relatively large (more than 30 mL).
2. Different temperature grades of cooling bath refrigerants need to be configured, and all the refrigerants have certain dangerousness.
3. The sample test tube needs to change between different cold bath sleeves, complex operation, and the test tube outer wall forms the comdenstion water easily.
4. Need take out the muddy condition of observation with the sample test tube according to the cooling grade requirement during artifical test, the frequent just human error of operation is great.
5. The operation is complex, the analysis time is long, and the test process of a single sample is not less than 30min.
6. The equipment has large size and weight and can not meet the requirements of miniaturization and field detection.
7. The detection precision is not high enough, and the manual mode can only be accurate to 1 ℃.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device for petroleum product cloud point survey, photoelectric detection unit real-time supervision sample is the muddy condition, and cooperation temperature monitoring unit and temperature control unit automatically judge the cloud point, need not artifical the participation, realize the testing process full automatization, adopt high accuracy photoelectric conversion and accurate temperature measurement device etc. make analysis and detection precision and repeatability all obtain improving.
In order to realize the purpose, the utility model discloses a technical scheme is:
an apparatus for determining the cloud point of a petroleum product, comprising: the sample cell is respectively provided with a sample inlet and a sample outlet, a signal acquisition and control system is arranged above the sample cell, the side wall of the sample cell is symmetrically provided with a light source generator and a photoelectric converter, the outer wall of the sample cell is provided with a temperature sensor, the bottom end of the sample cell is connected with a semiconductor refrigeration unit for cooling sample liquid in the sample cell, and the bottom end of the semiconductor refrigeration unit is provided with a heat radiation fin for heat radiation;
the light source generator and the photoelectric converter are respectively in signal connection with the signal acquisition and control system, the signal acquisition and control system controls the on and off of the light source generator, and the signal acquisition and control system receives signals of the photoelectric converter;
the semiconductor refrigeration unit and the temperature sensor are respectively in signal connection with the signal acquisition and control system, and the signal acquisition and control system receives signals of the temperature sensor to further control the on-off of the semiconductor refrigeration unit.
The device for determining the cloud point of the petroleum product, wherein: the photoelectric converter can sense the intensity change of the light source signal of the light source generator.
The utility model has the advantages that: the micro-pipeline design reduces the analysis sample amount, the micro-sample adopts a semiconductor refrigeration mode to meet the requirement of large-span refrigeration, and the micro-pipeline analysis system is quick, stable, low in power consumption, simple in operation, quick in analysis, high in automation degree, automatic in control and detection in the whole analysis process, free of manual participation, capable of improving the analysis precision and repeatability, compact in structure, simple in pipeline and beneficial to the requirements of equipment miniaturization and field detection.
Drawings
FIG. 1 is a schematic diagram of an apparatus for measuring a cloud point of a petroleum product.
Description of reference numerals: 1-a light source generator; 2-a semiconductor refrigeration unit; 3-a heat sink; 4-a sample inlet; 5-a sample cell; 6-sample outlet; 7-a photoelectric converter; 8-a temperature sensor; and 9-a signal acquisition and control system.
Detailed Description
As shown in fig. 1, the utility model provides a device for petroleum product cloud point survey sets up sample entry 4 and sample export 6 respectively on sample cell 5, supplies sample liquid input and discharge, sample cell 5's top sets up signal acquisition and control system 9, the symmetry sets up light source generator 1 and photoelectric converter 7 on sample cell 5's the lateral wall, sample cell 5's outer wall sets up temperature sensor 8, sample cell 5's bottom and semiconductor refrigeration unit 2 are connected, supply the sample liquid cooling in sample cell 5, semiconductor refrigeration unit 2's bottom sets up fin 3, supplies the heat dissipation.
The light source generator 1 and the photoelectric converter 7 are respectively in signal connection with the signal acquisition and control system 9, the signal acquisition and control system 9 controls the on and off of the light source generator 1, the photoelectric converter 7 can sense the intensity change of a light source signal of the light source generator 1, and the signal acquisition and control system 9 receives the signal of the photoelectric converter 7.
The semiconductor refrigeration unit 2 and the temperature sensor 8 are respectively in signal connection with the signal acquisition and control system 9, and the signal acquisition and control system 9 receives the signal of the temperature sensor 8 to further control the on-off of the semiconductor refrigeration unit 2.
In the embodiment, a sample liquid is injected into a sample cell 5 through a sample inlet 4, in order to ensure that the sample cell 5 is filled with the sample liquid to be detected and has no bubbles, the amount of the injected sample liquid should be larger than the sum of the volumes of the sample cell 5 and a sample injection pipeline, the redundant sample liquid flows out from a sample outlet 6 to be recovered by a waste liquid device, after the sample liquid is injected into the sample cell 5, a signal acquisition and control system 9 is started, the signal acquisition and control system 9 automatically starts a light source generator 1, a photoelectric converter 7 and a temperature sensor 8, the temperature sensor 8 monitors the temperature of the sample liquid in real time and transmits a temperature sensing signal to the signal acquisition and control system 9, the photoelectric converter 7 also senses the light source signal intensity of the light source generator 1 in real time, and the photoelectric converter 7 also transmits the sensed light source signal to the signal acquisition and control system 9, after the signal value is stable, the signal collection and control system 9 starts the semiconductor refrigeration unit 2, the semiconductor refrigeration unit 2 starts to cool the sample liquid in the sample cell 5, the signal collection and control system 9 monitors the change of the light source signal intensity sensed by the photoelectric converter 7 in real time, meanwhile, the signal collection and control system 9 also monitors the temperature of the sample liquid in real time through the temperature sensor 8, the sample liquid in the sample cell 5 starts to gradually crystallize along with the reduction of the temperature, and the crystals shield and scatter the light source signal of the light source generator 1, so that the real-time signal intensity (Qtx) of the photoelectric converter 7 is attenuated, and the lower the temperature, the more crystals appear in the sample, the turbid sample is generated, causing the signal of the real-time signal strength (Qtx) to decrease gradually until
Qtx = real time signal strength (after refrigeration initiation) Qto = original signal strength (before refrigeration initiation)
Ttx = real time transmittance
When Ttx in (2) reaches a predetermined threshold value, the temperature of the sample liquid monitored by the temperature sensor 8 at this time is the cloud point of the sample liquid.
After the detection process is finished, the signal acquisition and control system 9 automatically stops the work of the semiconductor refrigerating unit 2, after the sample liquid is recovered to the room temperature, the sample liquid is cleaned by using a cleaning liquid and a sample injection device, and the pipeline and the residual liquid in the sample pool 5 are emptied, so that the next measurement can be carried out.
The utility model has the advantages that:
the micro-pipeline design reduces the amount of analysis samples, the micro-samples adopt a semiconductor refrigeration mode to meet the requirement of large-span refrigeration, and the micro-pipeline design is quick, stable, low in power consumption, simple in operation, quick in analysis, high in automation degree, automatic control and detection in the whole analysis process, free of manual participation, capable of improving the analysis precision and repeatability, compact in structure, simple in pipeline and beneficial to the requirements of equipment miniaturization and field detection.
The foregoing description is intended to be illustrative, rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations, or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. An apparatus for determining the cloud point of a petroleum product, comprising: a sample inlet (4) and a sample outlet (6) are respectively arranged on a sample cell (5), a signal acquisition and control system (9) is arranged above the sample cell (5), a light source generator (1) and a photoelectric converter (7) are symmetrically arranged on the side wall of the sample cell (5), a temperature sensor (8) is arranged on the outer wall of the sample cell (5), the bottom end of the sample cell (5) is connected with a semiconductor refrigeration unit (2) for cooling sample liquid in the sample cell (5), and a radiating fin (3) is arranged at the bottom end of the semiconductor refrigeration unit (2) for radiating heat;
the light source generator (1) and the photoelectric converter (7) are respectively in signal connection with the signal acquisition and control system (9), the signal acquisition and control system (9) controls the on-off of the light source generator (1), and the signal acquisition and control system (9) receives signals of the photoelectric converter (7);
the semiconductor refrigeration unit (2) and the temperature sensor (8) are respectively in signal connection with the signal acquisition and control system (9), and the signal acquisition and control system (9) receives a signal of the temperature sensor (8) to further control the opening and closing of the semiconductor refrigeration unit (2).
2. An apparatus for determining a cloud point of a petroleum product according to claim 1, wherein: the photoelectric converter (7) can sense the intensity change of the light source signal of the light source generator (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221302914.XU CN217820115U (en) | 2022-05-27 | 2022-05-27 | Device for determining cloud point of petroleum product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221302914.XU CN217820115U (en) | 2022-05-27 | 2022-05-27 | Device for determining cloud point of petroleum product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217820115U true CN217820115U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221302914.XU Active CN217820115U (en) | 2022-05-27 | 2022-05-27 | Device for determining cloud point of petroleum product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217820115U (en) |
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2022
- 2022-05-27 CN CN202221302914.XU patent/CN217820115U/en active Active
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