Automatic measuring device and measuring method for calibrating volume of atmospheric storage tank vehicle

Abstract

The invention relates to the technical field of volume verification, and discloses an automatic measuring device and method for normal pressure storage tank truck volume verification, the device comprises a water supply system, a verification platform and a reference tank, the verification platform is provided with a first charging pipe and a second charging pipe, the first charging pipe is internally provided with a first flow meter, and the second charging pipe is internally provided with a second flow meter; a second flow meter is installed in the second charging pipe, the water supply system conveys verification media to the reference tank and the detected storage tank through the first charging pipe and the second charging pipe respectively, and liquid level meters are arranged on the reference tank and the detected storage tank. According to the invention, the reference tank with various known parameter data is set, and the reference tank and the detected storage tank are subjected to volume calibration together, so that the measured volume data of the reference tank and the detected storage tank can be measured through direct water injection, the actual volume data of the detected storage tank can be derived through a comparison mode, the influence of different environment temperatures on the measurement result is reduced, and the measurement accuracy is improved. And the accuracy and reliability of detection results are improved.

Description

Technical Field

[0001] The invention relates to the technical field of volume verification, and in particular to an automatic measuring device and a measuring method for volume verification of a normal pressure tank truck. Background Art

[0002] The measurement of the volume of tank trucks is of great significance for ensuring transportation safety, improving efficiency, reducing costs and complying with regulations. At present, the capacity comparison method is a common method for calibrating the capacity of automobile tank trucks in my country. For example, in the prior art, the patent document with the announcement number CN117451144A discloses a 5G-based automatic calibration device and method for tank truck capacity, including a set of standard tanks, controllers, mobile terminals, cloud service platforms, etc., where the standard tanks on site include magnetostrictive liquid level gauges, electric water outlet ball valves, temperature transmitters, etc. The invention realizes the automatic reading of signals such as the volume value, temperature, and liquid level of standard metal measuring instruments and the automatic processing of data, as well as the automatic control and timing of electric ball valves. The calibration results can be sent to the cloud service platform, and can also be read through the electronic tag of the instrument. The entire calibration process is fully automated, which greatly reduces the error of manual calibration and improves the calibration efficiency and accuracy.

[0003] In order to meet the requirements of the JJG133-2005 "Automobile Oil Tank Truck Capacity" calibration regulations and actual work needs, it can meet the calibration of commonly used atmospheric pressure tank trucks. The water temperature change during a measurement process generally does not exceed 2°C. Because the temperature has a greater impact on the calibration result of the volume, in actual use, affected by different seasons and different ambient temperatures, the measured volume is different. It is necessary to set up a reference tank and perform volume calibration together with the inspected tank to ensure the accuracy and reliability of the traceability of the measurement value. However, the existing tank truck volume calibration device lacks volume calibration of the reference tank, resulting in poor accuracy and reliability of the test results, which brings many inconveniences to the measurement work. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that due to the lack of volume verification of a reference tank, there are shortcomings in the accuracy and reliability of the detection results, and to propose an automatic measuring device and a measuring method for the volume verification of a normal pressure tank truck.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: an automatic measuring device for volume calibration of a normal pressure tank truck, comprising a water supply system, a calibration platform and a reference tank, a first charging pipe and a second charging pipe are installed on the calibration platform, a first flow meter is installed in the first charging pipe, and a second flow meter is installed in the second charging pipe, the water supply system transports a calibration medium to the reference tank through the first charging pipe, and the water supply system transports a calibration medium to the inspected tank through the second charging pipe; A first liquid level gauge is installed at the bottom of the reference tank, and a second liquid level gauge is installed at the bottom of the inspected tank. Both the first liquid level gauge and the second liquid level gauge are non-contact liquid level gauges. When the reference tank and the inspected tank are filled with calibration media of the same liquid level depth, the storage capacity in the reference tank and the inspected tank can be recorded from the first flow meter and the second flow meter respectively. After the tank is full, the difference between the values ​​of the first flow meter and the second flow meter is small, and the volume of the inspected tank can be measured by reading the value of the second flow meter.

[0006] Preferably, the water supply system includes a water tank, a charging pump, a one-way valve and a filter, the inlet ends of the first charging pipe and the second charging pipe are both connected to the water tank, the first charging pipe and the second charging pipe are both installed with a charging pump, a one-way valve and a filter, wherein a one-way valve and a third flow meter are installed on the output main pipe of the water tank, the first charging pipe and the second charging pipe are both connected to the output main pipe of the water tank, and water can be injected into the reference tank and the inspected storage tank at the same flow rate at the same time through the charging pump.

[0007] Preferably, a plurality of partitions are provided inside the reference tank and the inspected tank, and a reserve adjusting assembly is installed at the bottom of the reference tank, the reserve adjusting assembly includes a mounting cylinder fixedly mounted on the reference tank, an adjusting column linearly slidingly mounted in the mounting cylinder, a servo motor is fixedly mounted on the bottom of the mounting cylinder, a transmission screw is fixedly mounted on the rotating end of the servo motor, the transmission screw is threadedly connected with the adjusting column, when the adjusting column moves up and down in the mounting cylinder, the end of the adjusting column can extend into the reference tank, a displacement sensor for detecting the adjusting column is arranged in the mounting cylinder, and when the adjusting column telescopes, the volume in the reference tank is changed, which can also be used to adjust the liquid level in the tank.

[0008] Preferably, a discharge pipe is installed at the bottom of the reference tank and the inspected storage tank, and a stop valve, a one-way valve, a discharge pump, a filter and a fourth flow meter are provided on the two discharge pipes. The reference tank and the inspected storage tank are connected to the water tank through the discharge pipes respectively. After the detection is completed, the calibration medium can be pumped into the water tank through the discharge pump.

[0009] The present invention also proposes an automatic measurement method for volume verification of a normal pressure tank truck, comprising the following steps: S1. Start the loading pumps on the first loading pipe and the second loading pipe, and inject the calibration medium into the reference tank and the inspected tank at the same flow rate until the liquid level in the reference tank and the inspected tank reaches H0, and then stop loading; S2. Record the storage parameter Vt1 and the liquid level parameter Ht1 of the reference tank at the same time interval t1, where the storage parameter Vt1 refers to the real-time value of the first flow meter, and the liquid level parameter Ht1 refers to the real-time value of the first liquid level meter, and draw a Vt1-Ht1 curve graph; S3. At the same time interval t2, with t1=t2, record the storage parameter Vt2 and the liquid level parameter Ht2 of the inspected storage tank, where the storage parameter Vt2 refers to the real-time value of the second flow meter, and the liquid level parameter Ht2 refers to the real-time value of the second liquid level meter, and draw a Vt2-Ht2 curve graph; S4. Empty the calibration medium in the reference tank and the inspected tank through the discharge pipe, and record the values ​​of the fourth flowmeters on the two discharge pipes respectively.

[0010] Preferably, S1, S2, and S3 are performed simultaneously to measure the water temperatures in the reference tank and the inspected tank respectively. When the temperature difference between the water temperatures in the reference tank and the inspected tank is less than 2°C, the loading pump is stopped. If Ht1 is not equal to Ht2 at this time, a marking line is marked on the surface of the inspected tank. The height of the marking line is the same as Ht2. In actual use, the position marked by the marking line is convenient for focusing on the position at a later time, analyzing the causes of the difference, promptly discovering safety hazards, or reducing the scope of maintenance to facilitate maintenance.

[0011] Preferably, when Ht1 is not equal to Ht2, the servo motor is started to drive the adjusting column to move up and down, so that Ht1 is equal to Ht2, and the upward or downward movement distance L1 of the adjusting column is recorded by the displacement sensor; Start the loading pumps on the first loading pipe and the second loading pipe, inject the same amount of calibration medium into the reference tank and the inspected tank at the same flow rate, start the servo motor, drive the adjusting column to move up and down, make Ht1 equal to Ht2 again, and record the upward or downward movement distance L2 of the adjusting column through the displacement sensor. The local volume difference between the reference tank and the inspected tank = |L1-L2|×the cross-sectional area of ​​the adjusting column. The local volume difference can intuitively reflect the volume difference of the internal structure of the reference tank and the inspected tank, so that the device can promptly detect whether there are quality problems in the hidden parts of the tank while calibrating the volume.

[0012] Preferably, when the liquid level heights in the reference tank and the inspected tank are both H0, the storage volumes of the reference tank and the inspected tank are Vc1 and Vc2 respectively. When the calibration medium is 20°C and the liquid level height is H0, the storage volume of the reference tank is a known value Vbiao. Then, if Vbiao>Vc1, it can be calculated that when the calibration medium is 20°C, the storage volume of the inspected tank is Vc2+(Vbiao-Vc1); if Vbiao<Vc1, it can be calculated that when the calibration medium is 20°C, the storage volume of the inspected tank is Vc2-(Vc1-Vbiao). This measurement method reduces the impact of different ambient temperatures on the calibration results, making the volume calibration of the inspected tank more accurate and quick.

[0013] The present invention has the following beneficial effects: 1. The automatic measuring device for volume calibration of atmospheric pressure tank trucks proposed in the present invention sets a reference tank with known parameter data to perform volume calibration together with the inspected tank. It can not only measure the measured volume data of the reference tank and the inspected tank by direct water injection, but also derive the actual volume data of the inspected tank by comparison, thereby reducing the influence of different ambient temperatures on the measurement results and improving the accuracy and reliability of the detection results.

[0014] 2. The automatic measuring device for volume calibration of atmospheric pressure storage tank trucks proposed in the present invention is provided with an adjusting column with known parameter data in the reference tank. When the reference tank and the inspected tank are subjected to volume calibration, the liquid level in the reference tank can be regulated and adjusted by changing the telescopic length of the adjusting column, and made the same as the liquid level in the inspected tank. The automatic measuring method for volume calibration of atmospheric pressure storage tank trucks proposed in the present invention can be used to calculate the local volume difference between the reference tank and the inspected tank by adjusting the displacement distance of the column. The local volume difference can intuitively reflect the volume difference of the internal structure of the reference tank and the inspected tank. The main reason for the volume difference is whether there is foreign matter in the inspected tank, or whether the number or thickness of the partitions in the inspected tank meets the requirements, so that the device can timely find out whether there are quality problems in the hidden parts of the tank while calibrating the volume.

[0015] 3. The automatic measurement method for volume calibration of atmospheric pressure tank trucks proposed in the present invention injects calibration medium into the reference tank and the inspected tank at the same flow rate, and records the liquid level heights in the reference tank and the inspected tank in real time. When the liquid level heights in the reference tank and the inspected tank are quite different, a marking line can be marked at the corresponding height on the surface of the inspected tank. According to the position marked by the marking line, it is convenient to focus on the inspection of the position at a later time, analyze the cause of the difference, discover safety hazards in time, or reduce the scope of maintenance, provide convenience for maintenance, and provide reference data for the analysis of volume deviation while calibrating the volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the device proposed by the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of a reference tank proposed in the present invention; Figure 3 for Figure 2 A schematic diagram of the structure enlargement at point A; Figure 4 It is a plan view schematic diagram of the device proposed by the present invention; Figure 5 This is the Vt1-Ht1 curve diagram proposed by the present invention; Figure 6 This is the Vt2-Ht2 curve diagram proposed by the present invention; Figure 7Schematic diagram of Vt1-Ht1 curve and Vt2-Ht2 curve Figure 1 ; Figure 8 Schematic diagram of Vt1-Ht1 curve and Vt2-Ht2 curve Figure 2 ; Fig. 9 Schematic diagram of Vt1-Ht1 curve and Vt2-Ht2 curve Figure 3 .

[0017] In the figure: 1 calibration platform, 2 reference tank, 3 first charging pipe, 4 second charging pipe, 5 first flow meter, 6 second flow meter, 7 first liquid level meter, 8 second liquid level meter, 9 inspected storage tank, 10 water tank, 11 charging pump, 12 one-way valve, 13 filter, 14 partition, 15 mounting cylinder, 16 adjusting column, 17 servo motor, 18 transmission screw, 19 unloading pipeline, 20 stop valve, 21 third flow meter, 22 unloading pump, 23 fourth flow meter. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] Reference Figure 1-Figure 4 An automatic measuring device for volume calibration of a normal pressure tank truck includes a water supply system, a calibration platform 1 and a reference tank 2. A first loading pipe 3 and a second loading pipe 4 are installed on the calibration platform 1. A first flow meter 5 is installed in the first loading pipe 3, and a second flow meter 6 is installed in the second loading pipe 4. The water supply system transports the calibration medium to the reference tank 2 through the first loading pipe 3, and the water supply system transports the calibration medium to the inspected tank 9 through the second loading pipe 4.

[0021] Specifically, Figure 4 As shown, the water supply system includes a water tank 10, a charging pump 11, a one-way valve 12 and a filter 13. The inlet ends of the first charging pipe 3 and the second charging pipe 4 are both connected to the water tank 10, and the first charging pipe 3 and the second charging pipe 4 are both installed with a charging pump 11, a one-way valve 12 and a filter 13.

[0022] A one-way valve 12 and a third flow meter 21 are installed on the output main pipe of the water tank 10 , and the first charging pipe 3 and the second charging pipe 4 are both connected to the output main pipe of the water tank 10 .

[0023] A first liquid level gauge 7 is installed at the bottom of the reference tank 2, and a second liquid level gauge 8 is installed at the bottom of the inspected tank 9. Both the first liquid level gauge 7 and the second liquid level gauge 8 are non-contact liquid level gauges. The liquid level heights in the reference tank 2 and the inspected tank 9 can be measured by the first liquid level gauge 7 and the second liquid level gauge 8 respectively. A plurality of partitions 14 are arranged inside the reference tank 2 and the inspected tank 9. The partitions 14 inside the tank have a wave-breaking effect to reduce the impact of the liquid in the tank body when the car is driving. The partitions 14 belong to the conventional settings of the prior art and will not be elaborated here.

[0024] When the reference tank 2 and the inspected storage tank 9 are filled with the calibration medium with the same liquid level depth, the storage capacity in the reference tank 2 and the inspected storage tank 9 can be recorded by the first flow meter 5 and the second flow meter 6 respectively. It should be noted that according to the requirements of the calibration procedure JJG133-2005 "Automobile Tank Truck Capacity", the calibration medium uses circulating water to ensure that the water temperature change does not exceed 2°C during a measurement process.

[0025] like Figure 2 , Figure 3 As shown, a reserve adjusting assembly is installed at the bottom of the reference tank 2, and the reserve adjusting assembly includes a mounting cylinder 15 fixedly mounted on the reference tank 2, an adjusting column 16 is linearly slidably mounted in the mounting cylinder 15, a servo motor 17 is fixedly mounted on the bottom of the mounting cylinder 15, a transmission screw 18 is fixedly mounted on the rotating end of the servo motor 17, and the transmission screw 18 is threadedly connected to the adjusting column 16. When the adjusting column 16 moves up and down in the mounting cylinder 15, the end of the adjusting column 16 can extend into the reference tank 2, and a displacement sensor for detecting the adjusting column 16 is arranged in the mounting cylinder 15.

[0026] It should be noted that the various parameters of the reference tank 2 are known information, such as the volume, empty height, number and thickness of the partitions 14 in the reference tank 2, and the various parameters of the adjusting column 16 are known information, such as the diameter, length, cross-sectional area, etc. of the adjusting column 16, and when the upper end face of the adjusting column 16 is flush with the inner bottom wall of the reference tank 2, the volume in the reference tank 2 is a known nominal volume, denoted as V. When the adjusting column 16 extends into the reference tank 2, the volume in the reference tank 2 at this time decreases, and the liquid level inside it will rise; when the adjusting column 16 is retracted into the mounting tube 15, the volume in the reference tank 2 at this time increases, and the liquid level inside it will drop.

[0027] A discharge pipe 19 is installed at the bottom of the reference tank 2 and the inspected storage tank 9. A stop valve 20, a one-way valve 12, a discharge pump 22, a filter 13 and a fourth flow meter 23 are provided on the two discharge pipes 19. The reference tank 2 and the inspected storage tank 9 are connected to the water tank 10 through the discharge pipes 19 respectively. After the inspection is completed, the calibration medium can be pumped into the water tank 10 through the discharge pump 22.

[0028] In the process of calibrating the volume of the inspected storage tank 9, after the tank is full, the difference between the values ​​of the first flow meter 5 and the second flow meter 6 is small, and the volume of the inspected storage tank 9 can be measured by reading the value of the second flow meter 6. Ideally, the value of the third flow meter 21 is equal to the sum of the values ​​of the first flow meter 5 and the second flow meter 6, and is also equal to the sum of the values ​​of the two fourth flow meters 23. Since the volume in the reference tank 2 is known, when the value of the first flow meter 5 is significantly different from the value of the volume in the reference tank 2 when the tank is full, it can be inferred that there is an abnormality in the first flow meter 5, which can prevent errors in the calibration results caused by flow meter failure, so that they can be discovered and corrected in time.

[0029] The present invention also proposes an automatic measurement method for the volume verification of a normal pressure storage tank truck. The automatic measurement device for the volume verification of a normal pressure storage tank truck proposed in the present invention is used to verify the volume of the inspected storage tank 9, comprising the following steps: S1, start the charging pumps 11 on the first charging pipe 3 and the second charging pipe 4, inject the test medium into the reference tank 2 and the tested tank 9 at the same flow rate, until the liquid level height in the reference tank 2 and the tested tank 9 reaches H0, and stop charging; S2. At the same time interval t1, record the storage parameter Vt1 and liquid level parameter Ht1 of the reference tank 2. The storage parameter Vt1 refers to the real-time value of the first flow meter 5, and the liquid level parameter Ht1 refers to the real-time value of the first liquid level meter 7. Draw a Vt1-Ht1 curve, such as Figure 5 As shown; S3. At the same time interval t2, and t1=t2, record the storage parameter Vt2 and liquid level parameter Ht2 of the inspected storage tank 9. The storage parameter Vt2 refers to the real-time value of the second flow meter 6, and the liquid level parameter Ht2 refers to the real-time value of the second liquid level meter 8. Draw a Vt2-Ht2 curve, such as Figure 6 As shown; S4. Empty the calibration medium in the reference tank 2 and the inspected storage tank 9 through the discharge pipe 19, and record the values ​​of the fourth flowmeter 23 on the two discharge pipes 19 respectively.

[0030] Among them, S1, S2, and S3 are carried out simultaneously, and the water temperatures in the reference tank 2 and the inspected storage tank 9 are measured respectively. When the temperature difference between the water temperatures in the reference tank 2 and the inspected storage tank 9 is less than 2°C, the charging pump 11 is stopped. If Ht1 is not equal to Ht2 at this time, a marking line is marked on the surface of the inspected storage tank 9, and the height of the marking line is the same as Ht2. Figure 7 shown.

[0031] In actual use, according to the position of the marker line, it is convenient to focus on the inspection of the position later, analyze the reasons for the difference, discover safety hazards in time, or reduce the scope of maintenance to facilitate maintenance. For example, an X-ray detector is used to detect the position marked with a marker line on the inspected storage tank 9. While verifying the volume, the Vt1-Ht1 curve and the Vt2-Ht2 curve are compared to provide reference data for the analysis of the volume deviation. Under normal circumstances, the temperature difference of the water introduced into the reference tank 2 and the inspected storage tank 9 by a water tank 10 at the same time is less than 2°C. If it is greater than 2°C, manual intervention is required; if Ht1 is equal to Ht2, it indicates that the reference tank 2 and the inspected storage tank 9 have the same water storage capacity and the same liquid level. The theoretical value is mentioned here. There is a certain deviation in reality. As long as it is within the allowable tolerance range, it will not be introduced here.

[0032] In addition, when S1, S2, and S3 are performed simultaneously and equal amounts of test medium are injected into the reference tank 2 and the test tank 9, when Ht1 is not equal to Ht2, the servo motor 17 is started to drive the adjustment column 16 to move up and down to make Ht1 equal to Ht2. Figure 8 As shown, at this time, Ht1=Ht2=h1, and the upward or downward movement distance L1 of the adjustment column 16 is recorded by the displacement sensor; Start the charging pumps 11 on the first charging pipe 3 and the second charging pipe 4, inject the same amount of calibration medium into the reference tank 2 and the tested tank 9 at the same flow rate, start the servo motor 17, drive the adjustment column 16 to move up and down, make Ht1 equal to Ht2 again, and record the upward or downward movement distance L2 of the adjustment column 16 through the displacement sensor, as shown in FIG. Fig. 9 As shown, at this time, Ht1=Ht2=h2, the local volume difference between the reference tank 2 and the inspected tank 9 = |L1-L2|×the cross-sectional area of ​​the adjusting column 16, and the local volume difference here refers to the volume difference between the reference tank 2 and the inspected tank 9 within the height range of h2-h1.

[0033] An adjusting column 16 with known parameter data is set in the reference tank 2. When the reference tank 2 and the inspected tank 9 are subjected to volume verification, the liquid level in the reference tank 2 can be adjusted and controlled by changing the telescopic length of the adjusting column 16, and made the same as the liquid level in the inspected tank 9. The automatic measurement method for volume verification of atmospheric pressure tank trucks proposed in the present invention can be used to calculate the local volume difference between the reference tank 2 and the inspected tank 9 by adjusting the displacement distance of the column 16. The local volume difference can intuitively reflect the volume difference of the internal structure of the reference tank 2 and the inspected tank 9. On the premise that the parameter data of the reference tank 2 meet the product quality requirements, the main reason for the volume difference is whether there are foreign objects in the inspected tank 9, or whether the number or thickness of the partitions 14 in the inspected tank 9 meets the requirements, so that the device can timely find out whether there are quality problems in the hidden parts of the tank while verifying the volume.

[0034] Start the servo motor 17 to drive the adjusting column 16 to move up and down. When the upper end surface of the adjusting column 16 is flush with the inner bottom wall of the reference tank 2, continue the operations of S1, S2, and S3 to measure the full tank volume of the reference tank 2 and the inspected storage tank 9.

[0035] In this embodiment, reference Figure 5 , Figure 6 , when the upper end surface of the regulating column 16 is flush with the inner bottom wall of the reference tank 2, the volumes of the reference tank 2 and the inspected storage tank 9 are calibrated. After the reference tank 2 and the inspected storage tank 9 are filled with water, when the liquid level heights in the reference tank 2 and the inspected storage tank 9 are both H0, the storage volumes of the reference tank 2 and the inspected storage tank 9 are Vc1 and Vc2 respectively, wherein Vc1 and Vc2 are the values ​​actually measured by the first flow meter 5 and the second flow meter 6; For example, the known information of reference tank 2 is that when the test medium is 20°C, the liquid level is H0, and the upper end surface of the adjustment column 16 is flush with the inner bottom wall of the reference tank 2, the storage volume of the reference tank 2 is a known value V mark, and V mark represents the nominal volume of the reference tank 2. Affected by the ambient temperature, Vc1, Vc2 and V mark are not equal; Then, if Vb>Vc1, it can be calculated that when the calibration medium is 20°C, the storage volume of the inspected storage tank 9 is Vc2+(Vb-Vc1); if Vb<Vc1, it can be calculated that when the calibration medium is 20°C, the storage volume of the inspected storage tank 9 is Vc2-(Vc1-Vb). In summary, when the ambient temperature and the calibration medium temperature are not equal to 20°C, the volume of the inspected storage tank 9 can be calibrated. This measurement method reduces the impact of different ambient temperatures on the calibration results, making the volume calibration of the inspected storage tank 9 more accurate and quick.

[0036] If Vc1=Vc2, the storage volume of the inspected storage tank 9 is equal to Vmark.

[0037] It should be noted that according to the requirements of the JJG133-2005 "Automobile Tank Truck Capacity" verification regulations, the volume calculation must be performed at 20°C. The above method only takes the calculation of the storage volume of the inspected storage tank 9 when the verification medium is 20°C as an example.

[0038] The automatic measuring device for volume calibration of atmospheric pressure tank trucks proposed in the present invention sets a reference tank 2 whose parameter data are known to perform volume calibration together with the inspected tank 9. It can not only measure the measured volume data of the reference tank 2 and the inspected tank 9 by directly injecting water, but also derive the actual volume data of the inspected tank 9 by comparison, thereby reducing the influence of different ambient temperatures on the measurement results and improving the accuracy and reliability of the detection results.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic measuring device for volume calibration of a normal pressure tank truck, comprising a water supply system, a calibration platform (1) and a reference tank (2), characterized in that: The calibration platform (1) is provided with a first loading pipe (3) and a second loading pipe (4), the first loading pipe (3) is provided with a first flow meter (5), the second loading pipe (4) is provided with a second flow meter (6), the water supply system transports the calibration medium to the reference tank (2) through the first loading pipe (3), and the water supply system transports the calibration medium to the inspected storage tank (9) through the second loading pipe (4); A first liquid level gauge (7) is installed at the bottom of the reference tank (2), and a second liquid level gauge (8) is installed at the bottom of the inspected storage tank (9). Both the first liquid level gauge (7) and the second liquid level gauge (8) are non-contact liquid level gauges. When the reference tank (2) and the inspected storage tank (9) are filled with a calibration medium of the same liquid level depth, the storage volume in the reference tank (2) and the inspected storage tank (9) can be recorded from the first flow meter (5) and the second flow meter (6) respectively.

2. The automatic measuring device for volume verification of a normal pressure tank truck according to claim 1, characterized in that: The water supply system comprises a water tank (10), a charging pump (11), a one-way valve (12) and a filter (13); the inlet ends of the first charging pipe (3) and the second charging pipe (4) are both connected to the water tank (10); and the first charging pipe (3) and the second charging pipe (4) are both equipped with a charging pump (11), a one-way valve (12) and a filter (13).

3. The automatic measuring device for volume verification of a normal pressure tank truck according to claim 2, characterized in that: A one-way valve (12) and a third flow meter (21) are installed on the output main pipe of the water tank (10), and the first loading pipe (3) and the second loading pipe (4) are both connected to the output main pipe of the water tank (10).

4. The automatic measuring device for volume verification of a normal pressure tank truck according to claim 3 is characterized in that: The reference tank (2) and the inspected tank (9) are both provided with a plurality of partitions (14) inside. A storage regulating assembly is installed at the bottom of the reference tank (2). The storage regulating assembly comprises a mounting tube (15) fixedly mounted on the reference tank (2). An regulating column (16) is linearly slidably mounted in the mounting tube (15). A servo motor (17) is fixedly mounted at the bottom of the mounting tube (15). A transmission screw (18) is fixedly mounted at the rotating end of the servo motor (17). The transmission screw (18) is threadedly connected to the regulating column (16). When the regulating column (16) moves up and down in the mounting tube (15), the end of the regulating column (16) can extend into the reference tank (2). A displacement sensor for detecting the regulating column (16) is arranged in the mounting tube (15).

5. The automatic measuring device for volume verification of a normal pressure tank truck according to claim 4, characterized in that: The reference tank (2) and the inspected storage tank (9) are both provided with a discharge pipe (19) at the bottom, and the two discharge pipes (19) are both provided with a stop valve (20), a one-way valve (12), a discharge pump (22), a filter (13) and a fourth flow meter (23). The reference tank (2) and the inspected storage tank (9) are respectively connected to the water tank (10) through the discharge pipes (19).

6. An automatic measurement method for the volume verification of an atmospheric pressure storage tank truck, according to claim 5, wherein the automatic measurement device for the volume verification of an atmospheric pressure storage tank truck verifies the volume of the inspected storage tank (9), characterized in that: The following steps are involved: S1, start the loading pumps (11) on the first loading pipe (3) and the second loading pipe (4), inject the test medium into the reference tank (2) and the test tank (9) at the same flow rate until the liquid level in the reference tank (2) and the test tank (9) reaches H0, and stop loading; S2. Record the storage parameter Vt1 and the liquid level parameter Ht1 of the reference tank (2) at the same time interval t1, wherein the storage parameter Vt1 refers to the real-time value of the first flow meter (5), and the liquid level parameter Ht1 refers to the real-time value of the first liquid level meter (7), and draw a Vt1-Ht1 curve graph; S3, at the same time interval t2, where t1=t2, record the storage parameter Vt2 and the liquid level parameter Ht2 of the inspected storage tank (9), where the storage parameter Vt2 refers to the real-time value of the second flow meter (6), and the liquid level parameter Ht2 refers to the real-time value of the second liquid level meter (8), and draw a Vt2-Ht2 curve graph; S4. Empty the calibration medium in the reference tank (2) and the inspected storage tank (9) through the discharge pipe (19), and record the values ​​of the fourth flowmeter (23) on the two discharge pipes (19) respectively.

7. The automatic measurement method for volume verification of a normal pressure tank truck according to claim 6 is characterized in that: S1, S2, and S3 are performed simultaneously to measure the water temperature in the reference tank (2) and the inspected storage tank (9) respectively. When the temperature difference between the water temperature in the reference tank (2) and the inspected storage tank (9) is less than 2°C, the loading pump (11) is stopped. If Ht1 is not equal to Ht2 at this time, a marking line is marked on the surface of the inspected storage tank (9), and the height of the marking line is the same as Ht2.

8. The automatic measurement method for volume verification of a normal pressure tank truck according to claim 7, characterized in that: When Ht1 is not equal to Ht2, the servo motor (17) is started to drive the adjustment column (16) to move up and down, so that Ht1 is equal to Ht2, and the upward or downward movement distance L1 of the adjustment column (16) is recorded by the displacement sensor; Start the loading pumps (11) on the first loading pipe (3) and the second loading pipe (4), inject the same amount of the test medium into the reference tank (2) and the test tank (9) at the same flow rate, start the servo motor (17), drive the adjustment column (16) to move up and down, so that Ht1 is equal to Ht2 again, and record the upward or downward movement distance L2 of the adjustment column (16) through the displacement sensor. The local volume difference between the reference tank (2) and the test tank (9) = |L1-L2|× the cross-sectional area of ​​the adjustment column (16).

9. The automatic measurement method for volume verification of a normal pressure tank truck according to claim 6, characterized in that: When the liquid level heights in the reference tank (2) and the inspected tank (9) are both H0, the storage volumes of the reference tank (2) and the inspected tank (9) are Vc1 and Vc2 respectively. When the calibration medium is 20°C and the liquid level height is H0, the storage volume of the reference tank (2) is a known value Vb, then, if Vb>Vc1, it can be inferred that when the calibration medium is 20°C, the storage volume of the inspected tank (9) is Vc2+(Vb-Vc1); if Vb<Vc1, it can be inferred that when the calibration medium is 20°C, the storage volume of the inspected tank (9) is Vc2-(Vc1-Vb).

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