Automatic sampling device

Abstract

The utility model discloses an automatic sampling device which comprises a mobile working table, a sampling assembly, a depth metering assembly, a density measuring assembly and a positioning assembly are arranged on the mobile working table, the moving position of an oil tank is detected through the positioning assembly, an external control host controls a telescopic frame to descend, and a sampling pipe is driven to descend to be immersed below the liquid level of an oil product. Through work of the sampling pump, oil liquid enters the flushing bottle along the sampling pipe, the sampling pipe is cleaned, after cleaning is completed, the electric control valve entering the flushing bottle from the sampling pipe is closed, the electric control valve on the branch pipeline is opened, the oil liquid enters the sampling bottle, and meanwhile the sampling depth and density of the oil liquid are measured through the depth measuring assembly and the density measuring assembly. After sampling and measurement are finished, the telescopic frame resets, and the sampling and metering operation of the single oil tank truck is finished. The device can realize automatic sampling and measurement of oil products, is accurate in sampling and measurement, is not influenced by time, and improves the working efficiency of oil product sampling and measurement to a greater extent.

Description

Technical Field

[0001] The utility model relates to the technical field of oil sampling devices, in particular to an automatic sampling device. Background Art

[0002] According to actual work experience, the measurement and sampling operations of railway tank cars in oil depots are relatively difficult, and manual operation cannot overcome this problem. During sampling operations, manual sampling cannot be accurately quantified, making it impossible to collect accurate and uniform samples, which in turn affects the experimental results and ultimately affects long-term quality inspections. During measurement operations, it is difficult to ensure accuracy in manual measurement operations. The depth measurement position may not be the lowest point of the oil tank, and the depth gauge is also difficult to ensure that it stops descending immediately after touching the bottom. Nighttime operation makes the operation even more difficult. In addition, the safety of manual operation is difficult to guarantee, especially in adverse weather conditions and at night, and the operation efficiency is low. Therefore, a fully automatic rail-mounted railway tank car sampling device is proposed. Utility Model Content

[0003] The purpose of the present invention is to provide an automatic sampling device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic sampling device, comprising a mobile workbench, the mobile workbench is located on a track adapted thereto, a sampling component, a depth metering component, a density measuring component and a positioning component are provided on the mobile workbench, the moving position of the oil tank is detected by the positioning component, when the positioning component detects the tank mouth, the external control host of the running frame where the oil tank is located starts to slow down and stop under control, the sampling component comprises a sampling pump, the sampling pump is fixedly mounted on the frame of the mobile workbench, a sampling tube is provided on the sampling pump, a telescopic frame is provided on the mobile workbench, the lower end of the sampling tube is connected to the telescopic frame, the sampling tube is an elastic hose, the upper end of the sampling tube is connected to the flushing bottle, the upper part of the sampling tube is connected to one end of the branch pipeline, the branch pipeline is connected to the upper end of the sampling tube. The other end of the branch pipeline is connected to the sampling bottle. The sampling tube and the branch pipeline are both provided with electric-controlled valves. The sampling assembly, the depth metering assembly, the density measurement assembly and the positioning assembly are all electrically connected to the external control host. The external control host controls the telescopic frame to descend, driving the sampling tube to descend below the liquid surface of the immersed oil product. At this time, the sampling assembly starts to work, and the sampling pump works so that the oil first enters the flushing bottle along the sampling tube, so that the sampling tube is cleaned. After cleaning, the electric-controlled valve entering the flushing bottle from the sampling tube is closed, and the electric-controlled valve on the branch pipeline is opened, and the oil enters the sampling bottle. At the same time, the depth metering assembly and the density measurement assembly measure the sampling depth and density of the oil. After sampling and measurement are completed, the telescopic frame is reset, and the sampling and metering operation of a single tanker truck is completed.

[0005] Preferably, the telescopic frame includes a symmetrically arranged connecting block, the lower end of the connecting block is fixedly connected to an electric telescopic cylinder, the output ends of the two electric telescopic cylinders are connected to the insertion rod, and the lower end of the sampling tube is connected to the insertion rod. The electric telescopic cylinder is controlled to descend or ascend by an external control host, and the insertion rod descends or ascends accordingly, driving the sampling assembly, depth metering assembly, and density measurement assembly to extend into or out of the liquid surface.

[0006] Preferably, the depth measurement component includes a radar rangefinder, and the number of radar rangefinders is 2, one of which is installed on the mobile workbench to measure the distance between the radar rangefinder and the oil liquid surface, and the other radar rangefinder is installed on the insertion rod to immerse under the oil liquid surface to measure the distance between the radar rangefinder and the bottom of the oil tank. Assume that the oil depth is L, the height difference of the radar rangefinder is L1, the descent amount of the insertion rod is L2, the height of the radar rangefinder on the insertion rod from the tank bottom is L3, and the distance between the radar rangefinder on the mobile workbench and the liquid surface is L4. Then the oil depth is: L=L1+L2+L3-L4. The distance measurement may not meet the requirements of a single measurement accuracy due to the accuracy of the equipment itself. Multiple measurement data can be used to increase the measurement accuracy through a compensation algorithm. In long-term use, data and experience accumulation, the algorithm is continuously optimized to achieve a purpose of being closer to the true value.

[0007] Preferably, the density measuring component is a tuning fork vibration densitometer, which is installed on the insertion rod and is used to immerse the oil below the liquid surface to measure the density of the oil. The tuning fork vibration densitometer drives the liquid to vibrate through the vibration of the tuning fork. The free resonance frequency of the tuning fork changes with the density of the liquid, thereby changing the voltage signal. By amplifying and shaping the voltage signal, the apparent density value is calculated according to the relationship equation, and the oil temperature is measured by a resistance temperature sensor to automatically calculate the standard density.

[0008] Preferably, the positioning component is an industrial vision camera for aligning with the tank mouth of the oil tanker.

[0009] Preferably, the mobile workbench is composed of a mobile frame and walking wheels. The mobile frame is the main load-bearing component of the device and moves smoothly, which can ensure that the positioning component is vertically aligned with the ground and accurately scans the tank mouth of the tank truck for accurate positioning.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] A sampling component, a depth measurement component, a density measurement component and a positioning component are provided on the mobile workbench. The moving position of the oil tank is detected by the positioning component. When the positioning component detects the tank mouth, the external control host of the operating frame where the oil tank is located begins to slow down and stop under control. The sampling component includes a sampling pump, which is fixedly installed on the frame of the mobile workbench. A sampling tube is provided on the sampling pump. A telescopic frame is provided on the mobile workbench. The lower end of the sampling tube is connected to the telescopic frame. The sampling tube is an elastic hose. The upper end of the sampling tube is connected to the flushing bottle. The upper part of the sampling tube is connected to one end of the branch pipeline, and the other end of the branch pipeline is connected to the sampling bottle. Both the sampling tube and the branch pipeline are provided with The system is equipped with an electronically controlled valve. The sampling assembly, depth metering assembly, density measurement assembly, and positioning assembly are all electrically connected to an external control host. The external control host controls the telescopic frame to descend, driving the sampling tube to below the surface of the immersed oil. At this time, the sampling assembly begins to work. The sampling pump operates, causing the oil to first enter the flushing bottle along the sampling tube, thereby cleaning the sampling tube. After cleaning, the electronically controlled valve from the sampling tube into the flushing bottle closes, and the electronically controlled valve on the branch line opens, allowing the oil to enter the sampling bottle. At the same time, the depth metering assembly and density measurement assembly measure the sampling depth and density of the oil. After sampling and measurement are completed, the telescopic frame resets, and the sampling and metering operation of a single tanker truck is completed. This device can realize automatic sampling and measurement of oil products, and the sampling and measurement are accurate and not affected by time, which greatly improves the efficiency of oil sampling and measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the main structure view of the utility model;

[0013] Figure 2 It is a top view of the main structure of the utility model.

[0014] In the figure: 1-mobile workbench, 101-mobile frame, 102-travel wheel, 2-sampling assembly, 201-sampling pump, 202-sampling tube, 203-rinsing bottle, 204-branch pipeline, 205-sampling bottle, 3-positioning assembly, 4-telescopic frame, 401-connecting block, 402-electric telescopic cylinder, 403-insertion rod. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] Example:

[0017] See also Figure 1-2 The utility model provides the following technical solutions: an automatic sampling device, comprising a mobile operating platform 1, wherein the mobile operating platform 1 is located on a track adapted thereto, and a sampling component 2, a depth measuring component, a density measuring component and a positioning component 3 are provided on the mobile operating platform 1, and the moving position of the oil tank is detected by the positioning component 3. When the positioning component 3 detects the tank mouth, the external control host of the operating frame where the oil tank is located begins to slow down and stop under control, and the sampling component 2 comprises a sampling pump 201, and the sampling pump 201 is fixedly mounted on the frame of the mobile operating platform 1, and a sampling tube 202 is provided on the sampling pump 201, and a telescopic frame 4 is provided on the mobile operating platform 1, and the lower end of the sampling tube 202 is connected to the telescopic frame 4, and the sampling tube 202 is an elastic hose, and the upper end of the sampling tube 202 is connected to the flushing bottle 203, and the upper part of the sampling tube 202 is connected to one end of the branch pipe 204, and the branch pipe 20 The other end of 4 is connected to the sampling bottle 205. The sampling tube 202 and the branch line 204 are both provided with an electrically controlled valve. The sampling assembly 2, the depth metering assembly, the density measuring assembly and the positioning assembly 3 are all electrically connected to the external control host. The external control host controls the telescopic frame 4 to descend, driving the sampling tube 202 to descend below the liquid surface of the immersed oil product. At this time, the sampling assembly 2 starts to work, and the sampling pump 201 works, so that the oil first enters the flushing bottle 203 along the sampling tube 202, so that the sampling tube 202 is cleaned. After cleaning, the electrically controlled valve entering the flushing bottle 203 from the sampling tube 202 is closed, and the electrically controlled valve on the branch line 204 is opened, and the oil enters the sampling bottle 205. At the same time, the depth metering assembly and the density measuring assembly measure the sampling depth and density of the oil. After sampling and measurement are completed, the telescopic frame 4 is reset, and the sampling and metering operation of a single tanker truck is completed.

[0018] Specifically, the telescopic frame 4 includes a symmetrically arranged connecting block 401, and the lower end of the connecting block 401 is fixedly connected to an electric telescopic cylinder 402. The output ends of the two electric telescopic cylinders 402 are connected to the insertion rod 403, and the lower end of the sampling tube 202 is connected to the insertion rod 403. The electric telescopic cylinder 402 is controlled to descend or ascend by an external control host, and the insertion rod 403 is lowered or ascended accordingly, driving the sampling component 2, the depth measurement component, and the density measurement component to extend into or out of the liquid surface.

[0019] Specifically, the depth measurement component includes a radar rangefinder, and the number of radar rangefinders is 2. One radar rangefinder is installed on the mobile workbench 1 to measure the distance between the radar rangefinder and the oil liquid surface, and the other radar rangefinder is installed on the insertion rod 403 to immerse itself under the oil liquid surface to measure the distance between the radar rangefinder and the bottom of the oil tank. Assume that the oil depth is L, the height difference of the radar rangefinder is L1, the descent amount of the insertion rod 403 is L2, the height of the radar rangefinder on the insertion rod 403 from the tank bottom is L3, and the distance between the radar rangefinder on the mobile workbench 1 and the liquid surface is L4. Then the oil depth is: L=L1+L2+L3-L4. The distance measurement may not meet the requirements of a single measurement accuracy due to the accuracy of the equipment itself. Multiple measurement data can be taken to increase the measurement accuracy through a compensation algorithm. In long-term use, data and experience accumulation, the algorithm is continuously optimized to achieve the purpose of being closer to the true value.

[0020] Specifically, the density measuring component is a tuning fork vibration densitometer, which is installed on the insertion rod 403 and is used to immerse the oil below the liquid surface to measure the density of the oil. The tuning fork vibration densitometer drives the liquid to vibrate through the vibration of the tuning fork. The free resonance frequency of the tuning fork changes with the density of the liquid, thereby changing the voltage signal. By amplifying and shaping the voltage signal, the apparent density value is calculated according to the relationship equation, and the oil temperature is measured by the resistance temperature sensor to automatically calculate the standard density.

[0021] Specifically, the positioning component 3 is an industrial visual camera used to align with the tank mouth of the oil tanker.

[0022] Specifically, the mobile workbench 1 consists of a mobile frame 101 and walking wheels 102. The mobile frame 101 is the main load-bearing component of the device and moves smoothly, which can ensure that the positioning component 3 is vertically aligned with the ground and accurately scans the tank mouth of the tank truck for accurate positioning.

[0023] Working principle: a mobile work platform 1 is set, and the mobile work platform 1 is located on a track adapted thereto. The mobile work platform 1 is provided with a sampling component 2, a depth metering component, a density measurement component and a positioning component 3. The moving position of the oil tank is detected by the positioning component 3. When the positioning component 3 detects the tank mouth, the external control host of the operating frame where the oil tank is located begins to slow down and stop under control. The sampling component 2 includes a sampling pump 201, and the sampling pump 201 is fixedly mounted on the frame of the mobile work platform 1. A sampling tube 202 is provided on the sampling pump 201, and a telescopic frame 4 is provided on the mobile work platform 1. The lower end of the sampling tube 202 is connected to the telescopic frame 4. The sampling tube 202 is an elastic hose. The upper end of the sampling tube 202 is connected to the flushing bottle 203. The upper part of the sampling tube 202 is connected to one end of the branch pipeline 204, and the other end of the branch pipeline 204 is connected to the sampling The sampling bottle 205 is connected, and the sampling tube 202 and the branch line 204 are all provided with an electric control valve. The sampling component 2, the depth metering component, the density measurement component and the positioning component 3 are all electrically connected to the external control host. The external control host controls the telescopic frame 4 to descend, driving the sampling tube 202 to descend below the liquid surface of the immersed oil product. At this time, the sampling component 2 starts to work, and the sampling pump 201 works, so that the oil first enters the flushing bottle 203 along the sampling tube 202, so that the sampling tube 202 is cleaned. After cleaning, the electric control valve from the sampling tube 202 to the flushing bottle 203 is closed, and the electric control valve on the branch line 204 is opened, and the oil enters the sampling bottle 205. At the same time, the depth metering component and the density measurement component measure the sampling depth and density of the oil. After the sampling and measurement are completed, the telescopic frame 4 is reset, and the sampling and metering operation of a single tanker truck is completed.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. Automatic sampling device, characterized by: The invention comprises a mobile work platform (1), wherein the mobile work platform (1) is located on a track adapted thereto, wherein a sampling component (2), a depth measurement component, a density measurement component and a positioning component (3) are provided on the mobile work platform (1), wherein the sampling component (2) comprises a sampling pump (201), wherein the sampling pump (201) is fixedly mounted on a frame of the mobile work platform (1), wherein a sampling tube (202) is provided on the sampling pump (201), wherein a telescopic frame (4) is provided on the mobile work platform (1), wherein the lower end of the sampling tube (202) is connected to the telescopic frame (4). The sampling tube (202) is connected to the rack (4), the sampling tube (202) is an elastic hose, the upper end of the sampling tube (202) is connected to the flushing bottle (203), the upper part of the sampling tube (202) is connected to one end of the branch pipeline (204), the other end of the branch pipeline (204) is connected to the sampling bottle (205), the sampling tube (202) and the branch pipeline (204) are both provided with an electric control valve, and the sampling component (2), the depth metering component, the density measurement component and the positioning component (3) are all electrically connected to the external control host.

2. The automatic sampling device according to claim 1, characterized in that: The telescopic frame (4) comprises a symmetrically arranged connecting block (401), the lower end of the connecting block (401) being fixedly connected to an electric telescopic cylinder (402), the output ends of the two electric telescopic cylinders (402) being connected to an insertion rod (403), and the lower end of the sampling tube (202) being connected to the insertion rod (403).

3. The automatic sampling device according to claim 2, characterized in that: The depth measurement component includes a radar rangefinder, and the number of radar rangefinders is 2. One radar rangefinder is installed on the mobile workbench (1) to measure the distance between the radar rangefinder and the oil liquid surface, and the other radar rangefinder is installed on the insertion rod (403) to be immersed under the oil liquid surface to measure the distance between the radar rangefinder and the bottom of the oil tank.

4. The automatic sampling device according to claim 3, characterized in that: The density measuring component is a tuning fork vibration densitometer, and the density measuring component is mounted on the insertion rod (403) and is used to be immersed under the oil liquid surface to measure the density of the oil.

5. The automatic sampling device according to claim 4, characterized in that: The positioning component (3) is an industrial visual camera, which is used to align with the tank mouth of the oil tanker.

6. The automatic sampling device according to any one of claims 1 to 5, characterized in that: The mobile work platform (1) consists of a mobile frame (101) and running wheels (102).

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