Portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mining mine

Abstract

The invention particularly relates to an in-situ leaching uranium mining mine portable electromagnetic flowmeter on-site calibration device, which comprises a standard flowmeter, a data processing unit, a data processing unit, an in-situ leaching uranium mining mine portable electromagnetic flowmeter on-site calibration unit and an in-situ leaching uranium mining mine portable electromagnetic flowmeter on-site calibration unit, the temperature sensor is used for monitoring an environment temperature signal in real time and sending the signal to the data processing unit; the signal acquisition unit is used for acquiring a flow signal output by the measured electromagnetic flowmeter; the data processing unit is used for receiving the flow signal sent by the standard flowmeter, the flow signal sent by the signal acquisition unit and the environment temperature signal sent by the temperature sensor, generating a calibration result by adopting a self-adaptive algorithm and sending the calibration result to the portable case; and the portable case is used for receiving the calibration result sent by the data processing unit, displaying the calibration result and generating a calibration report based on the calibration result. According to the invention, on-site calibration work can be completed conveniently, safely, quickly and accurately.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic flowmeter calibration and verification technology in uranium leaching mines, and in particular to a portable on-site verification device for electromagnetic flowmeters in uranium leaching mines. Background Technology

[0002] In in-situ leaching production, flow meter measurement is a crucial step in the process. During solution transport, the accuracy of the flow rate affects process parameters and equipment safety. Electromagnetic flow meters are widely used in in-situ leaching uranium mining due to their high cost-effectiveness, low installation requirements, and simple maintenance. Their working principle is as follows: when a conductive fluid flows in a magnetic field, it cuts magnetic field lines, thereby generating an induced electromotive force (EMF) on electrodes on both sides of the pipe. The magnitude of the induced EMF is related to the magnetic field strength, the pipe diameter, and the average flow velocity of the fluid. Specifically, the formula for the induced EMF is: E x =BDv, where, E x B is the induced electromotive force, D is the magnetic flux density, and v is the pipe diameter. The volumetric flow rate q of the fluid is also given. v This is the ratio of the average flow velocity v of the fluid to the cross-sectional area of ​​the pipe (πD). 2 Substituting the product of q / 4 into the induced electromotive force formula, we get: q v =(πD / 4B)·E x This means that with a fixed pipe inner diameter D and a constant magnetic induction intensity B, there is a linear relationship between the measured fluid volumetric flow rate and the induced electromotive force. An induced electromotive force E is introduced by inserting an electrode on each side of the pipe. x By measuring the size of the flow meter, the volumetric flow rate can be calculated. Since electromagnetic flow meters are used extensively in in-situ leaching uranium mining projects, and production is continuous, uniform indoor calibration would involve a large amount of disassembly and assembly work, significantly impacting the production process. Therefore, on-site calibration is necessary. Summary of the Invention

[0003] The purpose of this invention is to provide a portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines. This device is applicable to electromagnetic flowmeters with various flow ranges in in-situ leaching uranium mining processes, enabling convenient, safe, fast, and accurate completion of field calibration work. It avoids the impact of large flow errors and environmental factors on calibration work, improves calibration efficiency, and ensures the standardization and safety of inspection work.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines, comprising:

[0006] The standard flow meter is installed in the pipeline where the electromagnetic flow meter under test is located via a quick-installation module. It is used to output flow signals and send them to the data processing unit.

[0007] Temperature sensor, used to monitor ambient temperature signals in real time and send them to the data processing unit;

[0008] The signal acquisition unit is used to acquire the flow signal output by the electromagnetic flowmeter under test;

[0009] The data processing unit is used to receive the flow signal sent by the standard flow meter, the flow signal sent by the signal acquisition unit, and the ambient temperature signal sent by the temperature sensor, and uses an adaptive algorithm to generate calibration results and send them to the portable chassis.

[0010] A portable chassis is used to receive calibration results sent by the data processing unit, display the calibration results, and generate a calibration report based on the calibration results.

[0011] As one feasible approach, the portable chassis is made of stainless steel and uses sealing rings for the interfaces. The portable chassis is equipped with a handle and casters. The interior of the portable chassis adopts a modular partitioned layout, with the signal acquisition unit, data processing unit, standard flow meter, and temperature sensor all housed inside the portable chassis. The connections between the signal acquisition unit and the electromagnetic flow meter under test, the signal acquisition unit and the data processing unit, the temperature sensor and the data processing unit, and the standard flow meter and the data processing unit all use quick-connect connectors.

[0012] As one possible implementation, the portable chassis is equipped with a power supply, a display screen, and a wireless communication module; the power supply provides operating power to the display screen, signal acquisition unit, data processing unit, temperature sensor, and standard flow meter via a quick-connect connector; the display screen communicates with the data processing unit via the wireless communication module to receive calibration results sent by the data processing unit, display the calibration results, and generate a calibration report based on the calibration results.

[0013] One possible implementation is a power supply consisting of a high-capacity lithium battery pack; the high-capacity lithium battery pack has an AC charging interface and a solar panel charging interface; the power supply integrates power management circuitry to provide DC power and overvoltage and overcurrent protection.

[0014] As one possible approach, the data processing unit is a PLC, with a display screen serving as the human-machine interface.

[0015] The data processing unit has built-in verification software to control the entire verification process, synchronously receive and record the flow signals output by the standard flow meter and the electromagnetic flow meter under test; automatically perform data comparison and analysis, calculate the verification results and store them.

[0016] The calibration software runs an adaptive calibration algorithm and supports local storage; the adaptive algorithm combines ambient temperature signals to correct calibration results in real time, achieving an accuracy of ±0.2%.

[0017] As one possible approach, the standard flow meter uses a clamp-on ultrasonic flow meter with an accuracy of 0.2%.

[0018] The standard flow meter includes a first ultrasonic probe and a second ultrasonic probe; wherein, the first ultrasonic probe is installed in the upstream pipeline of the electromagnetic flow meter under test through a quick-installation module, and the second ultrasonic probe is installed in the downstream pipeline of the electromagnetic flow meter under test through a quick-installation module.

[0019] One possible approach is to use a quick-install module as a magnetic clamp or quick connector, adaptable to different pipe diameters from DN15 to DN300.

[0020] As one possible approach, calibration results include indication error and repeatability, with the indication error presented as a curve.

[0021] Beneficial technical effects of the present invention:

[0022] Highly efficient and convenient: The modular design allows the main unit and sensors to be separated, enabling on-site online calibration to adapt to different field environments. This avoids cumbersome disassembly, assembly, and transportation processes, reducing calibration time from several days to several hours, greatly improving work efficiency and ensuring production continuity.

[0023] Accurate and reliable: The high-precision standard meter method is adopted, and the calibration conditions are consistent with the actual working conditions. The results can more accurately reflect the performance of the flow meter in the field environment, avoiding the error introduced by the difference between the laboratory and field environment. The dynamic compensation algorithm is adopted to correct the calibration results in real time with environmental parameters, and the accuracy reaches ±0.5%, which meets the field production needs of in-situ leaching uranium mining.

[0024] Safety specifications: The device itself is insulated, explosion-proof, and corrosion-resistant, adaptable to the harsh environment of in-situ leaching mines; standardized software processes eliminate human error, ensuring the standardization of the verification process and the security of the data.

[0025] Comprehensive functions: It can calibrate the entire flow meter sensor and converter, and can also diagnose faults in the converter section alone.

[0026] Portability and intelligence: The integrated portable design facilitates single-person operation; the intelligent control system automatically completes data recording, calculation, and report generation, reducing the technical threshold for operators. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of the portable electromagnetic flowmeter field calibration device for uranium mining in leaching according to the present invention.

[0028] In the diagram, 1 is the display screen; 2 is the portable chassis; 3 is the electromagnetic flowmeter under test; 4 is the first ultrasonic probe; and 5 is the second ultrasonic probe. Detailed Implementation

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0032] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0034] See Figure 1 This embodiment provides a portable electromagnetic flowmeter field calibration device for uranium leaching mines, comprising:

[0035] The standard flow meter needs to be calibrated by a third party in accordance with the measuring instrument. It is installed on the pipeline where the electromagnetic flow meter 3 under test is located through the quick installation module, and is used to output the flow signal and send it to the data processing unit.

[0036] Temperature sensors, which need to be calibrated by a third party as measuring instruments, are used to monitor ambient temperature signals in real time and send them to the data processing unit.

[0037] The signal acquisition unit is used to acquire the flow signal output by the electromagnetic flowmeter 3 under test. The flow signal output by the electromagnetic flowmeter 3 under test is a 4-20mA current signal or a 485 communication signal.

[0038] The data processing unit is used to receive the flow signal sent by the standard flow meter, the flow signal sent by the signal acquisition unit, and the ambient temperature signal sent by the temperature sensor, and to generate calibration results using an adaptive algorithm and send them to the portable chassis 2.

[0039] Portable chassis 2 is used to receive calibration results sent by the data processing unit, display the calibration results, and generate a calibration report based on the calibration results.

[0040] In this embodiment, the portable chassis 2 is made of high-strength, corrosion-resistant stainless steel and uses sealing rings for the interfaces to adapt to the humid and corrosive environment of the mine site. The portable chassis 2 is equipped with a portable handle and casters for easy movement and transportation by a single person. The interior of the portable chassis 2 adopts a modular partitioned layout. The signal acquisition unit, data processing unit, standard flow meter, and temperature sensor are all placed inside the portable chassis 2. The connections between the signal acquisition unit and the data processing unit, the temperature sensor and the data processing unit, and the standard flow meter and the data processing unit all use quick-connect connectors for easy rapid deployment and storage on site.

[0041] In this embodiment, the portable chassis 2 is equipped with a power supply, a display screen 1, and a wireless communication module; the power supply provides operating power to the display screen 1, the signal acquisition unit, the data processing unit, the temperature sensor, and the standard flow meter through a quick-connect connector; the display screen 1 is connected to the data processing unit through the wireless communication module to receive calibration results sent by the data processing unit, display the calibration results, and generate a calibration report based on the calibration results.

[0042] In this embodiment, the power supply includes a high-capacity lithium battery pack; the high-capacity lithium battery pack has an AC charging interface and a solar panel charging interface to ensure continuous energy supply; the power supply integrates a power management circuit to provide stable and clean DC power and provide overvoltage and overcurrent protection for each module.

[0043] In this embodiment, the data processing unit is a high-performance PLC, and the display screen 1 is used as the human-machine interface.

[0044] The data processing unit has built-in verification software to control the entire verification process, synchronously receive and record the flow signal output by the standard flow meter and the flow signal output by the electromagnetic flow meter 3 under test; automatically perform data comparison and analysis, calculate key indicators such as indication error and repeatability; generate and store test data, and store historical verification data of the electromagnetic flow meter 3 under test for trend analysis.

[0045] The calibration software runs an adaptive calibration algorithm and supports local storage; the adaptive algorithm combines ambient temperature signals to correct calibration results in real time, achieving an accuracy of ±0.2%.

[0046] In this embodiment, the standard flow meter is a clamp-on ultrasonic flow meter with an accuracy of 0.2%, which is temporarily connected to the pipeline where the electromagnetic flow meter 3 is located in a non-contact manner to simultaneously measure the instantaneous flow and cumulative flow in the same time period.

[0047] The standard flow meter includes a first ultrasonic probe 4 and a second ultrasonic probe 5; wherein, the first ultrasonic probe 4 is installed in the upstream pipeline of the electromagnetic flow meter 3 under test through a quick installation module, and the second ultrasonic probe 5 is installed in the downstream pipeline of the electromagnetic flow meter 3 under test through a quick installation module.

[0048] In this embodiment, the quick-installation module is a magnetic clamp or quick connector, which is compatible with different pipe diameters from DN15 to DN300.

[0049] In this embodiment, the calibration results include indication error and repeatability, with the indication error displayed as a curve.

[0050] The on-site calibration of electromagnetic flowmeters in the in-situ leaching uranium mining process using the portable electromagnetic flowmeter field calibration device of this embodiment includes the following steps:

[0051] Step 1: On-site deployment. Transport the device to the calibration point without disassembling the electromagnetic flowmeter 3 under test; reliably install the standard flowmeter on a straight pipe section near the electromagnetic flowmeter 3 under test.

[0052] Step 2: Electrical connection. Using test cables, connect the signal acquisition unit to the current output terminal and signal ground terminal of the electromagnetic flowmeter 3 under test.

[0053] Step 3: Turn on the device power and select online comparison mode as the verification mode on display screen 1;

[0054] Step 4: Set parameters on display screen 1, and input parameters such as the model, range, and pipe diameter of the electromagnetic flowmeter 3 being measured;

[0055] Step 5: Synchronous measurement, start the calibration program, and use the device to control the regulating valve to perform tests at multiple flow points such as 20%, 50%, 80%, and 100% of the full scale, whether there are on-site or natural flow changes during production. The device simultaneously records the standard flow value Qs of the standard flow meter and the reading Qm of the electromagnetic flow meter 3 under test.

[0056] Step 6: Data Analysis and Judgment: The data processing unit calculates the indication error and repeatability of each flow point in real time. The indication error is E = (Qm - Qs) / Qs × 100%. According to the preset national / industry verification regulations, such as JJG 1033-2023 "Electromagnetic Flowmeter", the unit automatically determines whether the tested electromagnetic flowmeter 3 is qualified.

[0057] Step 7: Report generation. After verification, compile and generate a report containing verification data, error curves, conclusions, and verification time.

[0058] Step 8: On-site restoration, verification completed, disconnect all connections, retract the device, and restore the on-site process to its original state.

[0059] The portable electromagnetic flowmeter field calibration device of the present invention, through one-button operation and automated process, reduces human intervention and shortens the calibration time to less than 10 minutes. It is optimal for on-site calibration of electromagnetic flowmeters in the process of in-situ leaching uranium mining. However, under the same production conditions of in-situ leaching mines, the method of use of the present invention can be varied without departing from the spirit of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention should be within the protection scope of the patent of the present invention.

[0060] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A portable electromagnetic flowmeter field calibration device for uranium mining through in-situ leaching, characterized in that, include: A standard flow meter is installed in the pipeline where the electromagnetic flow meter (3) is located, and is used to output flow signals and send them to the data processing unit; Temperature sensor, used to monitor ambient temperature signals in real time and send them to the data processing unit; The signal acquisition unit is used to acquire the flow signal output by the electromagnetic flowmeter (3) under test; The data processing unit is used to receive the flow signal sent by the standard flow meter, the flow signal sent by the signal acquisition unit, and the ambient temperature signal sent by the temperature sensor, and to generate calibration results using an adaptive algorithm and send them to the portable chassis (2). The portable chassis (2) is used to receive the calibration results sent by the data processing unit, display the calibration results, and generate a calibration report based on the calibration results.

2. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 1, characterized in that, The portable chassis (2) is made of stainless steel and the interface is sealed with a sealing ring. The portable chassis (2) is equipped with a handle and casters. The interior of the portable chassis (2) adopts a modular partition layout. The signal acquisition unit, data processing unit, standard flow meter and temperature sensor are all placed inside the portable chassis (2). The connection between the signal acquisition unit and the electromagnetic flow meter (3) under test, the signal acquisition unit and the data processing unit, the temperature sensor and the data processing unit, and the standard flow meter and the data processing unit all adopt quick-connect connectors.

3. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 1, characterized in that, The portable chassis (2) is equipped with a power supply, a display screen (1) and a wireless communication module; the power supply provides working power to the display screen (1), signal acquisition unit, data processing unit, temperature sensor and standard flow meter through a quick-connect connector; The display screen (1) is connected to the data processing unit via a wireless communication module to receive calibration results sent by the data processing unit, display calibration results, and generate a calibration report based on the calibration results.

4. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 3, characterized in that, The power supply includes a lithium battery pack; the lithium battery pack has an AC charging interface and a solar panel charging interface; the power supply integrates power management circuitry to provide DC power and overvoltage and overcurrent protection.

5. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 1, characterized in that, The data processing unit is a PLC, and the display screen (1) is used as the human-machine interface; The data processing unit has built-in verification software to control the entire verification process, synchronously receive and record the flow signal output by the standard flow meter and the flow signal output by the electromagnetic flow meter under test (3); automatically perform data comparison and analysis, calculate and store the verification results; the verification software runs an adaptive calibration algorithm and supports local storage.

6. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 5, characterized in that, The adaptive algorithm combines ambient temperature signals to correct the calibration results in real time, achieving an accuracy of ±0.2%.

7. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 1, characterized in that, The standard flow meter is a clamp-on ultrasonic flow meter with an accuracy of 0.2%.

8. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 7, characterized in that, The standard flow meter includes a first ultrasonic probe (4) and a second ultrasonic probe (5); wherein, the first ultrasonic probe (4) is installed in the upstream pipeline of the electromagnetic flow meter (3) under test through a quick installation module, and the second ultrasonic probe (5) is installed in the downstream pipeline of the electromagnetic flow meter (3) under test through a quick installation module.

9. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 7, characterized in that, The quick-installation module uses magnetic clamps or quick connectors to accommodate different pipe diameters from DN15 to DN300.

10. The portable electromagnetic flowmeter field calibration device for in-situ leaching uranium mines according to claim 1, characterized in that, The calibration results include indication error and repeatability, with the indication error presented as a curve.

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