CN216978897U - Feeding device for nuclear magnetic detection of total hydrogen content in petroleum product - Google Patents
Feeding device for nuclear magnetic detection of total hydrogen content in petroleum product Download PDFInfo
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- CN216978897U CN216978897U CN202123075441.2U CN202123075441U CN216978897U CN 216978897 U CN216978897 U CN 216978897U CN 202123075441 U CN202123075441 U CN 202123075441U CN 216978897 U CN216978897 U CN 216978897U
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Abstract
The utility model discloses a feeding device for nuclear magnetic detection of total hydrogen content in petroleum products, which comprises a glass container and a polytetrafluoroethylene rod, wherein the glass container is a cylindrical glass container, an external thread interface is arranged at an upper opening of the glass container, the polytetrafluoroethylene rod is a cylindrical rod, an internal thread interface is arranged at the lower end of the polytetrafluoroethylene rod, the polytetrafluoroethylene rod is in threaded connection with the glass container, the height of the glass container after being connected with the polytetrafluoroethylene rod corresponds to the height of a standard feeding container pipe of a nuclear magnetic analyzer, and the outer diameters of the glass container and the polytetrafluoroethylene rod correspond to the outer diameter of the standard feeding container pipe of the nuclear magnetic analyzer. According to the feeding device, the glass container and the polytetrafluoroethylene rod are combined, so that the glass container can be suitable for a nuclear magnetic detection device, the height of the glass container is greatly reduced, and the petroleum product is not adhered to the wall of the glass container above the liquid level when being added into the glass container, so that the detection result is higher in accuracy.
Description
Technical Field
The utility model relates to the technical field of petroleum detection, in particular to a feeding device for nuclear magnetic detection of total hydrogen content in petroleum products.
Background
Aiming at the test of the total content in gasoline, diesel oil, heavy oil, residual oil and coal tar samples, the laboratory adopts low-resolution nuclear magnetism as a detection instrument. Using glacial acetic acid (H, 6.714%), xylene (H, 9.494%), decalin (H, 13.124%), cyclohexane (H, 14.373%), n-heptane (H, 15.884%), and isooctane (H, 16.096%) which are reagents commonly used in laboratories as standard samples, a standard curve of the absolute amount of hydrogen versus the signal integral value was prepared according to the difference in the signal integral value in low-resolution nuclear magnetism from the difference in the total hydrogen content in the standard samples, the signal integral value of hydrogen in the sample was measured, and the hydrogen content in the sample was calculated from the standard curve and the mass of the sample.
In the prior art, a special glass test tube is generally used on a low-resolution nuclear magnetic analyzer, the glass test tube used on the low-resolution nuclear magnetic analyzer is a cylindrical glass tube with the length of 180mm and the diameter of the bottom surface of 14mm, wherein one end of the cylindrical glass tube is closed, the low-resolution nuclear magnetic analyzer is provided by a manufacturer of the low-resolution nuclear magnetic analyzer, when the low-resolution nuclear magnetic analyzer is used, a ruler is generally used for measuring 30 mm upwards at the bottom of the glass test tube, a transverse line is drawn by a pen, the instrument is placed into an analytical balance, weighing and peeling are carried out, and then the instrument is carefully takenThe sample is added to the bottom cross-line of the glass tube and the net mass of the sample is recorded. Then wiping off the outer transverse line of the test tube by using a small amount of acetone, then slowly screwing a clean polytetrafluoroethylene rod into the glass test tube until the bottom of the polytetrafluoroethylene rod just reaches the liquid surface, carefully screwing out the insertion rod, then putting the glass test tube into an adjusting block (an aluminum block bath), and preheating for 20 min at 40 ℃. And then the sample is put into a nuclear magnetic analyzer for detection. Because the glass test tube is longer, the sample is easy to stick on the glass tube wall when the sample is added, so that the repeatability of the measurement result of the sample is poor, the deviation of the detection result of the parallel sample is over 0.1 percent during multi-test, the linearity of the prepared standard working curve is poor, and R is2Typically 0.9987. In the measurement of heavy oil or residual oil samples, the situation is more severe, and the cleaning of glass test tubes and teflon stoppers is very difficult, so that improvement is highly desirable to achieve better results and to facilitate the operation of laboratory personnel.
Disclosure of Invention
The utility model aims to provide a feeding device for nuclear magnetic detection of total hydrogen content in petroleum products, aiming at the problems that the existing glass test tube for feeding in the nuclear magnetic detection of petroleum products in the background art is poor in detection accuracy, and the glass test tube and a polytetrafluoroethylene rod are difficult to clean.
In order to achieve the purpose, the utility model is realized by the following technical scheme: a feed arrangement for total hydrogen content nuclear magnetic detection in petroleum product, it includes glass container and poly tetrafluoro pole, the glass container be columniform glass container, be equipped with the external screw thread interface at the upper portion opening part of glass container, it is cylindrical pole to gather tetrafluoro pole, is equipped with the internal screw thread interface at the lower extreme of gathering the tetrafluoro pole, gather tetrafluoro pole and glass container and pass through threaded connection, height after glass container and the connection of poly tetrafluoro pole and nuclear magnetic analyzer's standard feeding container pipe highly corresponding, the external diameter of glass container and poly tetrafluoro pole and nuclear magnetic analyzer's standard feeding container pipe is corresponding.
As a further improvement of the feeding device for nuclear magnetic detection of the total hydrogen content in the petroleum product, the diameter of the glass container is 10-15mm, and the height of the glass container is 35-45 mm. Through the arrangement, the glass container can meet the capacity requirement of the total hydrogen content detection of petroleum products, can be lower in height, is not easy to stick to the container wall above the liquid level when a petroleum sample is added, enables the accuracy of the obtained detection result to be higher, is high in consistency of the detection result during repeated detection, and is convenient for the cleaning of the glass container after the detection is finished because the glass container is lower in height.
As a further improvement of the feeding device for nuclear magnetic detection of the total hydrogen content in the petroleum product, the diameter of the polytetrafluoroethylene rod is 10-16mm, and the height of the polytetrafluoroethylene rod is 145-155 mm. Through the arrangement, after the glass container is connected with the polytetrafluoroethylene rod, the overall height and the diameter of the glass container meet the height requirement of the nuclear magnetic analyzer, and the detection on the nuclear magnetic analyzer is facilitated.
As a further improvement of the feeding device for nuclear magnetic detection of the total hydrogen content in the petroleum product, the diameter of the external thread interface is smaller than that of the glass container. Through the arrangement, the overall outer diameter of the polytetrafluoroethylene rod after being connected with the glass container meets the height requirement of the nuclear magnetic analyzer, and the detection on the nuclear magnetic analyzer is facilitated.
As a further improvement of the feeding device for nuclear magnetic detection of the total hydrogen content in the petroleum product, the capacity of the glass container is 4-5 ml. By means of the arrangement, the capacity of the glass container can meet the capacity requirement of total hydrogen content detection in petroleum products.
The utility model has the positive effects that: 1) according to the feeding device for nuclear magnetic detection of total hydrogen content in petroleum products, the existing long cylindrical glass test tube with the height of 180mm and the diameter of 14mm is replaced by the glass container with the same or similar diameter and the height of only 35-45mm, so that the height of the glass test tube is greatly shortened, the capacity of the glass test tube meets the requirement of nuclear magnetic detection of hydrogen content in petroleum products, and when the petroleum products are added into the glass test tube, the petroleum products cannot stick to the wall of the glass container above the liquid level, so that the accuracy of detection results is higher; 2) according to the feeding device, the glass container is convenient to clean because the glass container is lower in height; 3) according to the feeding device, the polytetrafluoroethylene rod does not need to extend into the glass container when in use, and the threaded interface on the polytetrafluoroethylene rod is an external threaded interface and is positioned outside the glass container when in connection, so that petroleum products cannot be attached to the polytetrafluoroethylene rod, and the polytetrafluoroethylene rod cannot be polluted by the petroleum products and is easy to clean; 4) the feeding device provided by the utility model has the advantages that the height and the diameter of the feeding device meet the size requirements of a nuclear magnetic detection device through the connection combination of the glass container and the polytetrafluoroethylene rod, so that the detection of petroleum products is easy to implement.
Drawings
FIG. 1 is a schematic structural diagram of a feeding device for nuclear magnetic detection of total hydrogen content in petroleum products.
Fig. 2 is a schematic structural view of a glass container.
Fig. 3 is a schematic structural view of a teflon rod.
FIG. 4 is a standard curve of a feeding device using a conventional high glass test tube.
FIG. 5 is a standard curve for testing using the feeder of the present invention.
The reference numerals in the figures are as follows: the container comprises a glass container 1, a polytetrafluoroethylene rod 2, an external thread connector 3 and an internal thread connector 4.
Detailed Description
The technical solutions of the present invention are described clearly and completely by the following embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the feeding device for nuclear magnetic detection of total hydrogen content in petroleum products comprises a glass container 1 and a polytetrafluoroethylene rod 2, wherein the polytetrafluoroethylene rod 2 is connected with the glass container 1 through a thread, the height of the connected glass container 1 and the polytetrafluoroethylene rod 2 corresponds to the height of a standard feeding container pipe of a nuclear magnetic analyzer, and the outer diameters of the glass container 1 and the polytetrafluoroethylene rod 2 correspond to the outer diameter of the standard feeding container pipe of the nuclear magnetic analyzer.
The glass container 1 is a cylindrical glass container, an external thread interface 3 is arranged at an upper opening of the glass container, the diameter of the external thread interface 3 is smaller than that of the glass container 1, the diameter of the glass container 1 is 10-15mm, the height of the glass container 1 is 35-45mm, and the capacity of the glass container 1 is 4-5 ml.
Since the required amount of petroleum products is usually 3ml when the total hydrogen content in petroleum products is detected by using a nuclear magnetic detection device, the capacity of the glass container 1 is just suitable, and the outer diameter size of the glass container 1 is matched with the outer diameter size of a standard glass test tube on the nuclear magnetic detection device, so that the total hydrogen content in petroleum products can be directly detected by using the existing nuclear magnetic detection device. And because the height of the glass container 1 is reduced, the petroleum products can not stick on the inner wall of the container above the liquid level, so that the accuracy of the detection result is higher, the consistency of repeated detection is better, the height of the glass container is reduced, the glass container is more convenient to clean, the cost of the glass container can be reduced, and the glass container can be changed into disposable consumables according to actual conditions, so that the cleaning of the glass container, especially certain petroleum products with higher viscosity, can be avoided, and more time is needed for cleaning the container.
The polytetrafluoroethylene rod 2 is a cylindrical rod, an internal thread connector 4 is arranged at the lower end of the polytetrafluoroethylene rod 2, the diameter of the polytetrafluoroethylene rod 2 is 10-16mm, and the height of the polytetrafluoroethylene rod 2 is 145-155 mm. Because the effect of the polytetrafluoroethylene rod in the prior art is to stretch into the glass test tube and push the petroleum product adhered to the wall of the glass test tube to the position of the liquid level, the polytetrafluoroethylene rod is bound with the petroleum product in the process, so that the polytetrafluoroethylene rod is difficult to clean. By adopting the scheme of the utility model, the polytetrafluoroethylene rod has the functions of sealing the glass container on one hand and prolonging the overall height to ensure that the height meets the use requirement of a nuclear magnetic detection instrument on the other hand, so the polytetrafluoroethylene rod does not contact with a petroleum product to be detected, cannot be polluted by the petroleum product and is easier to clean.
When the feeding device is used, low-resolution nuclear magnetism is used as a detection instrument for testing the total hydrogen content in gasoline, diesel oil, heavy oil, residual oil and coal tar samples. A calibration curve of the absolute amount of hydrogen versus the integral value of the signal was prepared using glacial acetic acid (H, 6.714%), xylene (H, 9.494%), decalin (H, 13.124%), cyclohexane (H, 14.373%), n-heptane (H, 15.884%), and isooctane (H, 16.096%) which are reagents commonly used in laboratories as standard samples, depending on the total hydrogen content in the standard samples, and the integral value of the signal in low-resolution nuclear magnetism was different. The signal integral value of hydrogen in the sample is measured again, and the hydrogen content in the sample is calculated according to the standard curve and the mass of the sample.
The specific detection method for detecting the total hydrogen content in the petroleum product by adopting the feeding device of the utility model is as follows:
1) preparation of the Standard Curve
(1) Weighing: the glass container was placed on an analytical balance, peeled off, and a standard sample was pipetted into the vial to the vial neck where the sample mass was recorded. The amounts of the standard samples are given in the following table:
(2) and (3) measurement: the weighed vial and teflon rod were screwed together, placed in an adjusting block (aluminum block bath) and preheated at 40 ℃ for 20 min. The mixture was placed in nuclear magnetism, measured at 40 ℃ and the results were recorded.
(3) Waste treatment: the measured sample vial and teflon rod were unscrewed, the sample in the vial was poured into a waste bucket, and the vial was thrown into a waste glass bucket.
2) Measurement of a sample
Selecting diesel oil and heavy oil samples as test objects, preparing standard curves respectively according to the modes before and after the improvement, and measuring, wherein the standard curves are shown as the attached figure 5, and the test results are shown in the following table 2:
FIG. 4 is a standard curve of the prior feeding device with high glass test tubes, and the comparison between FIG. 4 and FIG. 5 shows that the sample standard curve is better in linearity and R is better after the feeding device of the present invention is adopted2Can be changed from 0.9987 before the improvement to 1.0000 after the improvement.
3) Measurement results
Diesel oil and heavy oil samples were selected as test objects, and each sample was used as a parallel sample, and the measurement results are shown in table 2 below.
As can be seen from Table 2, the difference between the total hydrogen measurement results of the improved parallel samples is 0.05%, which shows that the feeding device of the utility model has high consistency during repeated detection, and the detection accuracy is obviously improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a feed arrangement for total hydrogen content nuclear magnetic detection in petroleum product, its includes glass container and polytetrafluoroethylene pole, its characterized in that: the glass container is a cylindrical glass container, an external thread interface is arranged at an upper opening of the glass container, the polytetrafluoroethylene rod is a cylindrical rod, an internal thread interface is arranged at the lower end of the polytetrafluoroethylene rod, the polytetrafluoroethylene rod is in threaded connection with the glass container, the height of the glass container after the connection with the polytetrafluoroethylene rod corresponds to the height of a standard feeding container pipe of the nuclear magnetic analyzer, and the outer diameters of the glass container and the polytetrafluoroethylene rod correspond to the outer diameter of the standard feeding container pipe of the nuclear magnetic analyzer.
2. The feeding device for nuclear magnetic detection of total hydrogen content in petroleum products according to claim 1, characterized in that: the diameter of the glass container is 10-15mm, and the height of the glass container is 35-45 mm.
3. The feeding device for nuclear magnetic detection of total hydrogen content in petroleum products according to claim 1, characterized in that: the diameter of the polytetrafluoroethylene rod is 10-15mm, and the height of the polytetrafluoroethylene rod is 145-155 mm.
4. The feeding device for nuclear magnetic detection of total hydrogen content in petroleum products according to claim 1, characterized in that: the diameter of the external thread interface is smaller than that of the glass container.
5. The feeding device for nuclear magnetic detection of total hydrogen content in petroleum products according to claim 1, characterized in that: the capacity of the glass container is 4-5 ml.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123075441.2U CN216978897U (en) | 2021-12-09 | 2021-12-09 | Feeding device for nuclear magnetic detection of total hydrogen content in petroleum product |
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| CN202123075441.2U CN216978897U (en) | 2021-12-09 | 2021-12-09 | Feeding device for nuclear magnetic detection of total hydrogen content in petroleum product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117554328A (en) * | 2024-01-11 | 2024-02-13 | 西派特（北京）科技有限公司 | Online intelligent detection system of fluid near infrared spectrum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117554328A (en) * | 2024-01-11 | 2024-02-13 | 西派特（北京）科技有限公司 | Online intelligent detection system of fluid near infrared spectrum |
| CN117554328B (en) * | 2024-01-11 | 2024-03-26 | 西派特（北京）科技有限公司 | Online intelligent detection system of fluid near infrared spectrum |
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