Automatic metering device for water content during unloading of oil tank truck

Abstract

The invention discloses an oil tank truck unloading water content automatic metering device in the technical field of oil tank truck unloading water content metering, which comprises an oil storage tank and an oil tank truck body, the oil tank truck body is communicated with the oil storage tank through an oil unloading pipeline, and one end of the oil unloading pipeline close to the oil storage tank is provided with an oil unloading platform water content analyzer; a flow switch is installed at the end, away from the oil storage tank, of the oil discharging pipeline, and the oil discharging platform water content analyzer is connected with the flow switch through an anti-explosion hose. The device can accurately calculate the instantaneous moisture content in the crude oil in real time by filtering impurities in the crude oil and adopting temperature detection and heating functions and the like. Meanwhile, the starting time and the ending time of oil unloading of the oil tank truck are calculated through signals provided by the flow switch, and accurate metering of the comprehensive water content of unloading of the oil tank truck is achieved.

Description

Technical Field

[0001] This invention relates to the field of moisture content measurement technology for unloading oil tankers, and specifically to an automatic moisture content measurement device for unloading oil tankers. Background Technology

[0002] Currently, crude oil extracted directly from oil fields generally contains a certain amount of water during oilfield development. The water content in crude oil can cause difficulties in crude oil processing and increase the energy consumption of equipment. Therefore, it is essential to measure the water content of oil. The most common way to transport oil is by tanker truck, and measuring the water content of crude oil during tanker truck transportation is a very feasible method.

[0003] Currently, the moisture content of oil tankers during unloading is mainly measured manually and using a moisture analyzer. Manual testing primarily involves sampling at three points: top, middle, and bottom. After sampling, the samples are sent to the laboratory for analysis. However, this method is inefficient because the three-point sampling cannot represent the overall moisture content of the entire tanker, resulting in poor representativeness. Furthermore, the testing process is time-consuming, labor-intensive, and inefficient.

[0004] Currently, similar water content analyzers for unloading platforms are available on the market for measuring the water content of oil tankers. However, due to their generally simple structure and limited functionality, they are greatly affected by the temperature and impurities of the crude oil, resulting in inconsistent measurement accuracy. Furthermore, single-function water content analyzers cannot detect the start and end times of unloading, making it impossible to calculate the overall water content of the tanker, thus limiting their application in the field. Summary of the Invention

[0005] To address the shortcomings of existing technologies and equipment, this invention provides a rationally structured and fully functional automatic water content metering device for unloading oil tankers. This device achieves real-time and accurate calculation of the instantaneous water content of crude oil by filtering impurities, employing temperature detection, and heating functions. Simultaneously, it utilizes signals from a flow switch to calculate the start and end times of oil tanker unloading, thus achieving accurate measurement of the overall water content during unloading.

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: An automatic moisture content metering device for unloading oil tankers includes an oil storage tank and an oil tanker body. The oil tanker body is connected to the oil storage tank via an unloading pipeline. An oil unloading platform moisture content analyzer is installed at the end of the unloading pipeline closest to the oil storage tank, and a flow switch is installed at the end of the unloading pipeline furthest from the oil storage tank. The oil unloading platform moisture content analyzer and the flow switch are connected by an explosion-proof hose.

[0007] Preferably, the water content analyzer on the unloading platform includes, from bottom to top, a measuring sensor, a flange welding assembly, a heating junction box, a pipe bending welding assembly, and a meter head; the heating junction box is fixed to one side of the flange of the flange welding assembly by screws; the pipe bending welding assembly is installed on the heating junction box by a threaded connection, and the meter head is installed on the top of the pipe bending welding assembly by a threaded connection; the meter head contains a control circuit and a display module.

[0008] Based on the above technical features, the instantaneous moisture content and overall moisture content, which are easy to measure, are displayed on the meter in place.

[0009] Preferably, the measuring sensor consists of, from the outside to the inside, a filter cylinder, a heating tube cavity, a heating tube, a heating tube outlet conduit, a measuring probe, and a PTFE-sheathed probe; The heating tube is installed in the heating tube cavity, which is connected to the heating tube outlet conduit. The heating tube connection line is led out through the hollow heating tube outlet conduit, with one end connected to the heating tube and the other end connected to the heating junction box. The other end of the heating tube outlet conduit is fixed to the other side of the flange of the flange welding assembly.

[0010] Based on the above technical features, it is easy to control the heating element to perform heating.

[0011] Preferably, the filter cylinder is fixed on the heating tube cavity, and the filter cylinder is cylindrical.

[0012] Based on the above technical features, the circular filter cylinder can effectively prevent debris from clogging the measuring probe and affecting the measurement.

[0013] Preferably, the outer wall of the measuring probe is provided with four equally spaced grooves, and the upper part of the measuring probe is provided with a wrench position.

[0014] Based on the above technical features, the outer wall of the measuring probe is divided into four equal sections with grooves to make it hollow. This can accelerate the entry of crude oil between the PTFE-sheathed probe and the measuring probe, and improve the real-time performance of the measurement.

[0015] Preferably, the PTFE-sheathed probe is made of PTFE polytetrafluoroethylene material, and a coaxial capacitive sensor is formed between the PTFE-sheathed probe and the measuring probe.

[0016] Based on the above technical characteristics, PTFE (polytetrafluoroethylene) material has excellent chemical corrosion resistance, high temperature resistance, and low coefficient of friction, which facilitates the use of PTFE-sheathed probes.

[0017] Preferably, a temperature sensor is installed on the inner wall of the flange welding assembly, and the inside of the flange welding assembly is filled with epoxy resin.

[0018] Based on the above technical features, potting epoxy resin serves to fix the temperature sensor and transmit the liquid temperature.

[0019] In summary, the present invention has at least one of the following beneficial effects: The built-in temperature sensor in the moisture content analyzer of the unloading platform allows for direct temperature measurement and display, as well as temperature compensation for the moisture content measurement results. By equipping the oil unloading platform with a heating tube, the accuracy of the measurement is not affected by the solidification of crude oil when the crude oil temperature is low. The filter cartridge of the water content analyzer at the unloading platform can effectively filter impurities in crude oil, ensuring the accuracy of crude oil water content measurement. In summary, this invention achieves real-time and accurate calculation of the instantaneous water content in crude oil by filtering impurities, employing temperature detection, and heating functions; simultaneously, it utilizes signals provided by a flow switch to calculate the start and end times of oil tanker unloading, thereby achieving accurate measurement of the overall water content during oil tanker unloading. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the automatic moisture content metering device for unloading oil tankers according to the present invention in its operational state. Figure 2 This is a schematic diagram of the water content analyzer on the unloading platform of the present invention in its operational state. Figure 3 For the present invention Figure 2 Cross-sectional view of the sensor for measuring position A in the middle; Figure 4 This is a front view of the measuring probe of the present invention; Figure 5 This is a cross-sectional view of the measuring probe of the present invention; The attached diagram lists the components represented by each number as follows: 1-Oil storage tank, 2-Explosion-proof hose, 3-Flow switch, 4-Unloading pipeline, 5-Oil tanker body, 6-Unloading platform water content analyzer, 7-Measuring sensor, 701-Filter cartridge, 702-Heating tube cavity, 703-Measuring probe, 704-PTFE-sheathed probe, 705-Heating tube outlet conduit, 706-Heating tube connecting wire, 707-Temperature sensor, 8-Flange welding assembly, 9-Heating junction box, 10-Bend welding assembly, 11-Meter head. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0022] One embodiment provided by the present invention: as follows Figure 1As shown, an automatic water content metering device for unloading oil tankers includes an oil storage tank 1 and an oil tanker body 5. The oil tanker body 5 is connected to the oil storage tank 1 through an oil unloading pipeline 4. An oil unloading platform water content analyzer 6 is installed on the end of the oil unloading pipeline 4 near the oil storage tank 1, and a flow switch 3 is installed on the end of the oil unloading pipeline 4 away from the oil storage tank 1. The flow switch 3 is used to detect the flow status of crude oil in the oil unloading pipeline 4. like Figure 2 As shown, the unloading platform moisture analyzer 6 includes, from bottom to top, a measuring sensor 7, a flange welding assembly 8, a heating junction box 9, a pipe bending welding assembly 10, and a meter 11. The unloading platform moisture analyzer 6 and the flow switch 3 are connected by an explosion-proof hose 2. Specifically, the meter 11 in the unloading platform moisture analyzer 6 is connected to the flow switch 3 through the explosion-proof hose 2. The heating junction box 9 is fixed to one side of the flange of the flange welding assembly 8 with screws. The pipe bending welding assembly 10 is installed on the heating junction box 9 by a threaded connection, and the meter 11 is installed on the top of the pipe bending welding assembly 10 by a threaded connection. The meter 11 contains a control circuit and a display module, which facilitates the on-site display of the instantaneous moisture content and the overall moisture content.

[0023] like Figure 3 As shown, the measuring sensor 7 consists of a filter cylinder 701, a heating tube cavity 702, a heating tube, a heating tube outlet conduit 705, a measuring probe 703, and a PTFE-sheathed probe 704, from the outside to the inside. The heating tube is installed inside the heating tube cavity 702, which is connected to the heating tube outlet conduit 705. The heating tube connecting line 706 is led out through the hollow heating tube outlet conduit 705, with one end connected to the heating tube and the other end connected to the heating junction box 9. The other end of the heating tube outlet conduit 705 is fixed to the other side of the flange of the flange welding assembly 8. The oil unloading platform water content analyzer 6 is equipped with a heating tube, which solves the problem that the measurement accuracy is affected by the solidification of crude oil when the crude oil temperature is low. The filter cylinder 701 is fixed on the heating tube cavity 702, and the filter cylinder 701 is cylindrical. The cylindrical filter cylinder 701 can effectively filter impurities in crude oil, prevent impurities from clogging the measuring probe 703 and affecting the measurement, and ensure the accuracy of crude oil water content measurement. like Figure 4 and Figure 5 As shown, the outer wall of the measuring probe 703 is divided into four equal slots, making the measuring probe 703 hollow. The upper part of the measuring probe 703 is provided with a wrench position a for easy installation. The hollow design of the measuring probe 703 can accelerate the entry of crude oil between the PTFE sleeve probe 704 and the measuring probe 703, and improve the real-time measurement. The PTFE-coated probe 704 is made of PTFE polytetrafluoroethylene material, which has excellent chemical corrosion resistance, high temperature resistance, non-stick properties, and low coefficient of friction. The PTFE-coated probe 704 and the measuring probe 703 form a coaxial capacitive sensor. A temperature sensor 707 is installed on the inner wall of the flange welding assembly 8 as a temperature compensation element, which can directly measure and display the temperature and compensate for the moisture content measurement results. The flange welding assembly 8 is filled with epoxy resin, which serves to fix the temperature sensor 707 and transmit the liquid temperature.

[0024] Working principle: When the tanker truck begins unloading oil, the flow switch 3 outputs a closed signal to the unloading platform water content analyzer 6, which then initiates real-time measurement of the crude oil water content. When the tanker truck stops unloading, the flow switch 3 outputs an open signal to the unloading platform water content analyzer 6, which then stops measuring and calculates the overall water content from the start to the end of unloading. The temperature sensor 707 monitors the crude oil temperature in real time, and when the temperature is low, the heating element is activated to prevent the crude oil from adhering to the measuring probe 703 and the PTFE-sheathed probe 704, thus affecting the accuracy of the water content measurement.

[0025] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic moisture content metering device for unloading oil tankers, comprising an oil storage tank (1) and an oil tanker body (5), wherein the oil tanker body (5) is connected to the oil storage tank (1) via an unloading pipeline (4), characterized in that: The unloading pipeline (4) is equipped with a water content analyzer (6) at the end near the oil storage tank (1), and a flow switch (3) is installed at the end away from the oil storage tank (1). The water content analyzer (6) and the flow switch (3) are connected by an explosion-proof hose (2).

2. The automatic moisture content metering device for unloading oil tankers according to claim 1, characterized in that: The water content analyzer (6) of the unloading platform includes, from bottom to top, a measuring sensor (7), a flange welding assembly (8), a heating junction box (9), a pipe bending welding assembly (10), and a meter head (11); the heating junction box (9) is fixed to one side of the flange of the flange welding assembly (8) by screws; the pipe bending welding assembly (10) is installed on the heating junction box (9) by threaded connection, and the meter head (11) is installed on the top of the pipe bending welding assembly (10) by threaded connection; the meter head (11) is equipped with a control circuit and a display module.

3. The automatic moisture content metering device for unloading oil tankers according to claim 2, characterized in that: The measuring sensor (7) consists of, from the outside to the inside, a filter cylinder (701), a heating tube cavity (702), a heating tube, a heating tube outlet conduit (705), a measuring probe (703), and a PTFE-sheathed probe (704); The heating tube is installed inside the heating tube cavity (702). The heating tube cavity (702) is connected to the heating tube outlet conduit (705). The heating tube connecting line (706) is led out through the hollow heating tube outlet conduit (705). One end of the line is connected to the heating tube, and the other end is connected to the heating junction box (9). The other end of the heating tube outlet conduit (705) is fixed on the other side of the flange of the flange welding assembly (8).

4. The automatic moisture content metering device for unloading oil tankers according to claim 3, characterized in that: The filter cylinder (701) is fixed on the heating tube cavity (702), and the filter cylinder (701) is cylindrical.

5. The automatic moisture content metering device for unloading oil tankers according to claim 3, characterized in that: The measuring probe (703) has four equally spaced grooves on its outer wall, and a wrench position (a) is provided on the upper part of the measuring probe (703).

6. The automatic moisture content metering device for unloading oil tankers according to claim 3, characterized in that: The PTFE-coated probe (704) is made of PTFE polytetrafluoroethylene material, and a coaxial capacitive sensor is formed between the PTFE-coated probe (704) and the measuring probe (703).

7. The automatic moisture content metering device for unloading oil tankers according to claim 2, characterized in that: A temperature sensor (707) is installed on the inner wall of the flange welding assembly (8), and the inside of the flange welding assembly (8) is filled with epoxy resin.

Images