Oil product density on-line measuring device
By building a combination of the bypass sampling circuit of the oil pipeline and a vacuum U-shaped vibrating pipe, the uniformity and accuracy of the online measurement of oil product density in the oil pipeline are solved, and automated and continuous oil product density measurement is achieved, which avoids environmental impact and ensures the accuracy and representativeness of the measurement results.
Patent Information
- Application Number
- CN202421734161.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The prior art is difficult to achieve online, uniform and accurate measurement of oil density in oil pipelines, and the measurement results are susceptible to environmental influences, low efficiency, and insufficient intelligence.
The bypass sampling circuit of the oil pipeline is constructed, a sampling probe with oil inlet holes of different heights is used, and density measurement is performed in the U-shaped vibrating tube in a vacuum environment. Combined with heating and vibration control, the density is converted through the vibration signal feedback from the U-shaped vibrating tube, and the main control unit is used for automatic control and cleaning.
It realizes online, continuous and accurate measurement of oil density in the oil pipeline, with strong representative sampling, unaffected temperature, automated measurement process, cleaning unit ensures that the inner wall of the pipe is clean and the measurement results are accurate and reliable.
Smart Images
Figure CN223179995U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil pipeline monitoring in the petrochemical field, and particularly relates to an on-line oil density measuring device in an oil pipeline. Background Art
[0002] The density of oil products is of great significance in storage and transportation. First of all, the determination of the density of oil products can help determine the optimal storage and transportation conditions of oil products, and prevent the risks of overloading or oil leakage of storage tanks or transportation containers due to too large or too small density of oil products. The measurement results of density can evaluate the quality stability and safety of oil products; secondly, the volume and weight of oil products can be calculated through standard formulas, and then storage and transportation plans and freight settlement can be carried out; thirdly, the determination of the density of oil products can help monitor the possible composition changes in oil products, such as the increase in water content and the change in impurity concentration. The change in density can be used as an indicator of the quality of oil products, so as to timely discover potential problems and take corresponding measures to prevent quality decline; finally, the determination of the density of oil products can be used to identify different types of oil products, such as gasoline, diesel, lubricating oil, etc., so as to ensure correct handling and storage. In addition, the measurement results of density can also be used as an indicator to evaluate the quality of oil products, and help judge its compliance and market competitiveness.
[0003] Whether in the metering handover of oil products or the segmented mixed transportation of refined oil products, it is also very important to obtain the density of pipeline-transported oil products in a timely and accurate manner. Since the oil pipeline adopts a closed transportation method, it brings great difficulties to oil sampling and detection. The traditional manual sampling measurement method needs to introduce the oil product from the pipeline into the sampling tank to measure the density of the crude oil, and convert it according to the measured temperature and apparent density to obtain the standard density of the measured oil product. This method requires a large amount of oil sample; and the temperature is not convenient to control during measurement. Even if the constant temperature water bath method is adopted, it is necessary to consider whether there is light component volatilization; at the same time, this method has low efficiency, and it often takes about 10 minutes to complete the density measurement of one kind of oil product; due to the operation methods and proficiency of the operators, the reproducibility of the measurement results is poor. Although the existing on-line density measurement methods can detect the density of oil products on-line, there are also problems such as low intelligence level, uneven oil sampling, unreasonable temperature control, and measurement errors are easily affected by the environment.
[0004] Therefore, there is an urgent need for an on-line oil density measuring device in an oil pipeline, which can not only achieve uniform sampling but also avoid measurement errors caused by environmental influences.
[0005] The information disclosed in this background art section is only for increasing the understanding of the overall background of the utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model
[0006] The purpose of the utility model is to provide an online measurement device for the density of oil products in an oil pipeline. By constructing a bypass sampling loop of the oil pipeline and arranging oil inlet holes at different heights on the sampling probe, the uniformity of sampling can be effectively guaranteed. By passing the sample oil into a U-shaped vibrating tube under a vacuum environment, not only can the density of the oil products be accurately measured, but the temperature of the oil products can also be guaranteed to be unaffected by the environment to the greatest extent possible.
[0007] To achieve the above-mentioned purpose, the utility model provides an online oil density measurement device for online measurement of oil density in an oil pipeline, which at least includes: a sampling loop, which is a bypass pipeline of the oil pipeline, and a sampling probe arranged at the port of the sampling loop has multiple oil inlet holes with different sampling heights; a density measurement unit, which is arranged in the sampling loop and is provided with a U-shaped vibration tube, and the sample oil is introduced into the U-shaped vibration tube according to a preset pumping flow rate and the density measurement is performed after the sample oil is heated; the U-shaped vibration tube is in a vacuum environment.
[0008] Furthermore, in the above technical solution, a vibration controller is provided at the corresponding position of the U-shaped vibration tube, which is used to provide a continuous and stable vibration frequency for the U-shaped vibration tube; the oil density can be converted from the vibration signal fed back by the U-shaped vibration tube containing the sample oil.
[0009] Furthermore, in the above technical solution, a heater may be provided at a corresponding position of the U-shaped vibrating tube for heating the sample oil in the U-shaped vibrating tube to a preset measurement temperature.
[0010] Furthermore, in the above technical solution, the U-shaped vibration tube and the vibration controller can be arranged in a sealed metal shell, and a vacuum environment is provided for the U-shaped vibration tube in the sealed metal shell through a vacuum pump.
[0011] Furthermore, in the above technical solution, the device may further include a cleaning unit, which is arranged in a parallel pipeline of the U-shaped vibration tube and is used to clean and purge the U-shaped vibration tube.
[0012] Furthermore, in the above technical solution, the cleaning unit may include a cleaning liquid tank and a sewage tank, and an oil-soluble medium is provided in the cleaning liquid tank.
[0013] Furthermore, in the above technical solution, a liquid pump may be provided on the connecting pipeline between the cleaning liquid tank and the sewage tank.
[0014] Furthermore, in the above technical solution, a first solenoid valve and a second solenoid valve may be provided on the inlet pipe and the outlet pipe of the U-shaped vibration tube, respectively.
[0015] Furthermore, in the above technical solution, a third solenoid valve and a fourth solenoid valve may be provided on the connecting pipelines of the cleaning liquid tank and the sewage tank, respectively.
[0016] Further, in the above technical solution, the device may further include a master control unit for filtering the vibration signals fed back by the U-shaped vibration tube, converting the oil product density, measuring and controlling, controlling the opening and closing of the solenoid valve, controlling the heating temperature of the oil product, and controlling the cleaning, etc.
[0017] Compared with the prior art, the present utility model has the following beneficial effects:
[0018] 1) By constructing a sampling circuit, the present utility model can not only realize the on-line measurement of the oil product density in the oil pipeline, but also continuously measure the oil product density flowing through the density measurement unit, and the measured oil product can also be backfed into the oil pipeline;
[0019] 2) By providing a plurality of oil inlet holes with different sampling heights on the sampling probe, the present utility model can achieve uniform sampling and the sampling is more representative;
[0020] 3) By providing a U-shaped vibration tube in a vacuum environment, the present utility model can not only convert the oil product density by obtaining the vibration signals fed back by the U-shaped vibration tube, making the measurement of the oil product density more accurate, but also avoid the oil product temperature being affected by the environment;
[0021] 4) By means of the cleaning unit and using an oil-soluble medium during cleaning, the present utility model can ensure that the oil wax condensed on the inner wall of the U-shaped vibration tube is cleaned up; the purging function of the cleaning unit can ensure that the inner wall of the U-shaped vibration tube is clean and dry;
[0022] 5) By providing the master control unit, the present utility model can not only filter the vibration signals fed back by the U-shaped vibration tube, but also perform oil product density conversion, measurement control, solenoid valve opening and closing control, oil product heating temperature control, and cleaning control during the whole measurement process, ensuring the automation of the measurement process.
[0023] The above description is only an overview of the technical solution of the present utility model. In order to be able to more clearly understand the technical means of the present utility model and implement it according to the content of the specification, and at the same time to make the above and other purposes, technical features, and advantages of the present utility model more understandable, one or more preferred embodiments are listed below and described in detail in conjunction with the drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a schematic connection structure diagram of the on-line oil product density measurement device of the present utility model.
[0025] Figure 2 is Figure 1 a partial structure side view in
[0026] Figure 3It is a schematic structural diagram of a sampling probe in the sampling circuit of the present utility model (showing oil inlet holes at three different sampling heights).
[0027] Figure 4 It is a schematic structural diagram of the connection between the cleaning unit and the density measurement unit of the present utility model.
[0028] Main reference numerals description:
[0029] 1 - Sampling circuit, 10 - Sampling probe, 101 - Upper oil inlet hole, 102 - Middle oil inlet hole, 103 - Lower oil inlet hole, 11 - First solenoid valve, 12 - Second solenoid valve, 13 - Oil pump, 2 - Density measurement unit, 20 - Sealed metal shell, 21 - U-shaped vibrating tube, 210 - Density meter, 211 - Heater, 212 - Thermometer, 213 - Vibration controller, 3 - Cleaning unit, 31 - Third solenoid valve, 32 - Fourth solenoid valve, 33 - Cleaning liquid pump, 34 - Sewage pump, 4 - Total control unit. Detailed implementation manners
[0030] The following combines with the drawings to describe in detail the specific implementation manners of the present utility model, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation manners.
[0031] Unless otherwise clearly stated, in the whole specification and claims, the term "comprise" or its variations such as "comprising" or "including" etc. will be understood to include the stated elements or components, and do not exclude other elements or other components.
[0032] In this article, for the convenience of description, spatial relative terms such as "below", "beneath", "under", "above", "over", "on" etc. can be used to describe the relationship between one element or feature and another element or feature in the drawings. It should be understood that the spatial relative terms are intended to include different directions of the object in use or operation except the directions shown in the drawings. For example, if the object in the drawing is flipped, the element described as "below" or "under" other elements or features will be oriented "above" the element or feature. Therefore, the exemplary term "below" can include both the lower and upper directions. The object can also have other orientations (rotated 90 degrees or other orientations) and the corresponding explanations should be made for the spatial relative terms used in this article.
[0033] In this article, terms such as "first", "second" etc. are used to distinguish two different elements or parts, and are not used to limit a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second" etc. can also be interchanged with each other.
[0034] Such as Figures 1 to 4As shown in the figure, the utility model provides an on-line oil density measuring device for on-line measuring the oil density in an oil pipeline, which at least includes a sampling circuit 1 and a density measuring unit 2. Among them, the sampling circuit 1 is a bypass pipeline of the oil pipeline (not shown in the figure), and a sampling probe 10 (refer to Figure 3 ) is provided at the port of the sampling circuit 1, and has a plurality of oil inlet holes with different sampling heights. Preferably but not restrictively, Figure 3 shows three oil inlet holes, that is, an upper oil inlet hole 101, a middle oil inlet hole 102, and a lower oil inlet hole 103. By setting the oil inlet holes of the sampling probe 10 at three different sampling heights, it is possible to uniformly extract the oil products in the upper, middle, and lower parts of the pipeline during one sampling, making the sampling more representative. The density measuring unit 2 is arranged in the sampling circuit 1 and is provided with a U-shaped vibrating tube 21. The utility model can introduce the sample oil into the U-shaped vibrating tube 21 according to a preset pumping flow rate (adjusted by the oil pump 13 in Figure 4 ) and heat the sample oil (heated by the heater 211 in Figure 1 ) and then perform density measurement (that is, convert the density of the sample oil in the tube by obtaining the vibration signal fed back by the U-shaped vibrating tube). The U-shaped vibrating tube 21 of the utility model is in a vacuum environment.
[0035] By adopting the above technical solutions, the utility model can not only realize the on-line measurement of the oil density in the oil pipeline through constructing the sampling circuit, but also continuously measure the oil density of the oil flowing through the density measuring unit, and the measured oil can also be back-fed into the oil pipeline; by setting a plurality of oil inlet holes with different sampling heights on the sampling probe, uniform sampling can be realized and the sampling is more representative; by setting the U-shaped vibrating tube in a vacuum environment, not only can the density of the oil be converted by obtaining the vibration signal fed back by the U-shaped vibrating tube, making the measurement of the oil density more accurate, but also the oil temperature can be prevented from being affected by the environment.
[0036] Further as shown in Figure 1As shown in the figure, a first solenoid valve 11 and a second solenoid valve 12 are respectively provided on the inlet pipeline and the outlet pipeline of the U-shaped vibrating tube 21, and the opening and closing of these two solenoid valves are used to control the sample oil to enter and exit the U-shaped vibrating tube 21. A heater 211 is provided at a corresponding position of the U-shaped vibrating tube 21 (preferably on the side close to the inlet end) for heating the sample oil in the U-shaped vibrating tube 21 to a preset measurement temperature (which can be set and controlled by the master control unit 4) to ensure the accuracy of the measurement. A thermometer 212 is arranged at the downstream position of the heater 211, which can be used to measure the temperature of the oil before and after heating, and transmit the temperature data to the master control unit 4 for recording and storage. After being heated to the preset temperature, the sample oil can obtain the vibration signal of the whole oil + vibrating tube during the vibration of the U-shaped vibrating tube. This vibration signal can be monitored by a sensor (not shown in the figure) and transmitted to the master control unit 4 for recording, converted into the density of the oil and stored. The principles of vibration signal monitoring and density conversion are prior arts and will not be elaborated here. In addition, the heater 211 and the thermometer 212 of the present utility model can both adopt existing corresponding facilities and will not be elaborated here.
[0037] Further as Figure 2 shown in the figure, a vibration controller 213 is provided at a corresponding position of the U-shaped vibrating tube 21 (preferably at the bottom of the tube). The vibration controller can be used to provide a continuous and stable vibration frequency for the U-shaped vibrating tube 21. Further, the U-shaped vibrating tube 21 and the vibration controller 213 are arranged in a sealed metal housing 20, and a vacuum environment can be provided for the U-shaped vibrating tube 21 in the sealed metal housing 20 by a vacuum pump 201.
[0038] Further as Figure 1 、 4 shown in the figure, preferably but not limitedly, the device of the present utility model may further include a cleaning unit 3. The cleaning unit 3 is arranged in the parallel pipeline of the U-shaped vibrating tube 21 (refer to Figure 1 ), and is used to clean and purge the U-shaped vibrating tube. Further, the cleaning unit includes a cleaning liquid tank and a sewage tank (refer to Figure 4 ), and an oil-soluble medium is provided in the cleaning liquid tank. Correspondingly, liquid pumps (i.e., a cleaning liquid pump 33 and a sewage pump 34) are provided on the connecting pipeline between the cleaning liquid tank and the sewage tank, which are used to provide power for the cleaning liquid and the sewage after cleaning. A third solenoid valve 31 and a fourth solenoid valve 32 are respectively provided on the connecting pipeline between the cleaning liquid tank and the sewage tank, which are used to control the opening and closing of the cleaning program. The present utility model uses an oil-soluble medium during cleaning to ensure that the oil wax condensed on the inner wall of the U-shaped vibrating tube is cleaned up; the purging function of the cleaning unit can ensure that the inner wall of the U-shaped vibrating tube is clean and dry (the purging facility is not shown in the figure). After cleaning and purging, a new round of measurement calibration can be carried out.
[0039] Further as Figure 1As shown, the device of the present utility model further includes a master control unit 4, which is used for filtering the vibration signals fed back by the U-shaped vibrating tube, converting the oil density, measuring and controlling, controlling the opening and closing of the solenoid valves, controlling the heating temperature of the oil product, and controlling the cleaning, etc. Specifically, the master control unit 4 can start the vibration controller to provide a continuous and stable vibration frequency for the U-shaped vibrating tube 21. Through the vibration signals of the U-shaped vibrating tube fed back by the sensor, the master control unit 4 can record the vibration signals, then convert the vibration signals into the oil density and store them, and can also filter the vibration signals to obtain the true vibration signals of the U-shaped vibrating tube; the master control unit 4 can also control the opening and closing states of all solenoid valves (including the first solenoid valve 11, the second solenoid valve 12, the third solenoid valve 31, and the fourth solenoid valve 32) in the on-line oil density measuring device of the present utility model according to the required and pre-set valve commands; the master control unit 4 can also control the heater 211 according to the pre-set temperature to make the temperature of the oil product flowing through the U-shaped vibrating tube 21 be the set temperature value; the master control unit 4 can also automatically control the working state during the measurement according to the pre-set density measurement interval; the master control unit 4 can also control the periodic cleaning of the U-shaped vibrating tube to avoid the influence of wax deposition on the U-shaped vibrating tube on the density measurement; the master control unit 4 can also store the data such as the oil density, temperature, and vibration frequency calculated by the measurement.
[0040] Based on the on-line oil density measuring device of the present utility model, the oil product in the oil pipeline can be measured on-line multiple times at different temperatures. First, heat the oil product in the sampling circuit to the pre-set temperature. After the temperature is stable, with the help of the vibration controller of the U-shaped vibrating tube to provide a continuous and stable vibration frequency, the oil density is measured through the true vibration signals fed back by the U-shaped vibrating tube. After measuring the data, the sample oil is returned to the oil pipeline, and this process can be repeated 3 times, and the average density is calculated; the pre-set heating temperature can also be changed, and the above operations are repeated until density values at multiple different temperatures are obtained, realizing the on-line and continuous measurement of the oil density.
[0041] The foregoing description of the specific exemplary embodiments of the present utility model is for the purposes of illustration and exemplification. These descriptions are not intended to limit the present utility model to the precise forms disclosed, and it is obvious that many changes and variations can be made in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present utility model and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present utility model, as well as various different selections and changes. Any simple modifications, equivalent changes, and modifications made to the above exemplary embodiments shall fall within the protection scope of the present utility model.
Claims
1. An on-line measuring device for oil density, characterized in that, For on-line measurement of the density of oil products in an oil pipeline, including: A sampling circuit, which is a bypass pipeline of the oil pipeline. The sampling probe arranged at the port of the sampling circuit has multiple oil inlet holes with different sampling heights; A density measurement unit, which is arranged in the sampling circuit and is provided with a U-shaped vibrating tube. The sample oil is introduced into the U-shaped vibrating tube according to a preset pumping flow rate, heated, and then the density is measured; the U-shaped vibrating tube is in a vacuum environment.
2. The on-line oil density measuring device according to claim 1, characterized in that A vibration controller is arranged at the corresponding position of the U-shaped vibrating tube to provide a continuous and stable vibration frequency for the U-shaped vibrating tube; the density of the oil product is calculated through the vibration signal fed back by the U-shaped vibrating tube containing the sample oil.
3. The on-line oil product density measuring device according to claim 1, characterized in that A heater is arranged at the corresponding position of the U-shaped vibrating tube to heat the sample oil in the U-shaped vibrating tube to a preset measurement temperature.
4. The on-line oil density measuring device according to claim 2, characterized in that, The U-shaped vibrating tube and the vibration controller are arranged in a sealed metal shell, and a vacuum environment is provided for the U-shaped vibrating tube in the sealed metal shell by a vacuum pump.
5. The on-line oil density measuring device according to claim 1, characterized in that, The device further includes a cleaning unit, which is arranged in the parallel pipeline of the U-shaped vibrating tube and is used for cleaning and purging the U-shaped vibrating tube.
6. The on-line oil product density measuring device according to claim 5, characterized in that, The cleaning unit includes a cleaning liquid tank and a sewage tank, and an oil-soluble medium is arranged in the cleaning liquid tank.
7. The on-line measuring device for oil product density according to claim 6, characterized in that, A liquid pump is arranged on the connecting pipeline between the cleaning liquid tank and the sewage tank.
8. The on-line oil density measuring device according to claim 1, characterized in that, A first solenoid valve and a second solenoid valve are respectively arranged on the inlet pipeline and the outlet pipeline of the U-shaped vibrating tube.
9. The on-line oil density measuring device according to claim 7, characterized in that, A third solenoid valve and a fourth solenoid valve are respectively arranged on the connecting pipeline between the cleaning liquid tank and the sewage tank.
10. The on-line oil density measuring device according to claim 5, characterized in that, The device further includes a master control unit, which is used for filtering the vibration signal fed back by the U-shaped vibrating tube, converting the density of the oil product, measuring and controlling, controlling the opening and closing of the solenoid valve, controlling the heating temperature of the oil product, and controlling the cleaning.