Portable ultrasonic flowmeter online auxiliary training device for nuclear power station

Abstract

The utility model relates to a portable ultrasonic flowmeter on-line auxiliary training device for a nuclear power station, which is used for verifying the measuring function of a portable ultrasonic flowmeter and comprises a water storage barrel, a motor water pump assembly, a pressure gauge, a flow indicator and an electronic flowmeter. The motor water pump assembly is used for pumping liquid in the water storage barrel to form water flow in the pipeline; the pressure gauge is used for measuring pressure in the pipeline; the flow indicator is used for observing the flowing condition of liquid in a pipeline on one side of the portable ultrasonic flowmeter; and the electronic flowmeter is used for detecting the flow in the pipeline on the other side of the portable ultrasonic flowmeter. Compared with the prior art, the utility model can solve the problems that the failure of the measurement function of the portable ultrasonic flowmeter is judged in advance, the practical operation training of the ultrasonic flowmeter is not provided with appropriate working condition verification, the equipment and personal injury is easily caused during field test verification, the equipment works with diseases, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meter auxiliary equipment, in particular to an online auxiliary training device for a portable ultrasonic flow meter used in a nuclear power station. Background Art

[0002] During routine operations and overhauls, the instrumentation and control department of a nuclear power plant unit must regularly coordinate with operations to perform process system flow measurement, equipment function requalification testing, and nuclear safety supervision testing. This work utilizes portable ultrasonic flowmeters for flow measurement. Because these flow measurement tools lack online functional verification measures before use, abnormalities in the instrument's measurement function cannot be detected promptly. During a nuclear safety supervision test during a nuclear power plant overhaul, if an instrument malfunction prevents accurate flow measurement and fails to meet the nuclear safety supervision test acceptance criteria, the test can be delayed for several hours, potentially increasing personnel's unnecessary personal radiation dose. Furthermore, because the instrument operates in offline mode, measurement accuracy and allowable deviation cannot be guaranteed. Uncertain instrument operation often occurs in actual production, and the accuracy and timeliness required for the unit's operational test window cannot be guaranteed.

[0003] In addition, due to the special nature of nuclear power plants, the practical operation phase in daily training work is affected by the site and cannot allow trainees to fully master the specific operation methods of ultrasonic flow meters.

[0004] In summary, there is no mature and reliable auxiliary device in the functional verification and teaching training of portable ultrasonic flowmeters. Therefore, there is an urgent need to provide a reliable verification platform for the functional verification of portable ultrasonic flowmeters, so as to improve work efficiency, avoid quality risks caused by the unreliability of equipment and additional increase in personnel dose absorption, and improve the trainees' operating skills of portable ultrasonic flowmeters in daily training work to avoid being affected by the site. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the above-mentioned prior art and to provide an online auxiliary training device for a portable ultrasonic flowmeter for a nuclear power plant. By using a motor water pump assembly to extract the liquid in the water storage barrel to form a stable water flow in the pipeline, an online verification platform is provided for the portable ultrasonic flowmeter.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] The purpose of the utility model is to provide an online auxiliary training device for a portable ultrasonic flowmeter for a nuclear power plant, which is used to verify the measurement function of the portable ultrasonic flowmeter. The training device includes a water storage bucket, a motor water pump assembly, a pressure gauge, a flow indicator, and an electronic flowmeter; the water storage bucket, the motor water pump assembly, the pressure gauge, the flow indicator, the portable ultrasonic flowmeter, and the electronic flowmeter are connected in sequence through pipes; the electronic flowmeter is connected to the water storage bucket through a pipe; the motor water pump assembly is used to extract liquid from the water storage bucket to form a water flow in the pipe; the pressure gauge is used to measure the pressure in the pipe; the flow indicator is used to observe the liquid flow in the pipe on one side of the portable ultrasonic flowmeter; and the electronic flowmeter is used to detect the flow in the pipe on the other side of the portable ultrasonic flowmeter.

[0008] Furthermore, the training device also includes a check valve; the check valve is used to prevent liquid from flowing back into the motor water pump assembly.

[0009] Furthermore, the training device also includes a first stop valve and a second stop valve; the first stop valve is arranged on the pipeline between the motor water pump assembly and the check valve; the second stop valve is arranged on the pipeline between the electronic flow meter and the water storage tank; the first stop valve and the second stop valve are used to simulate fluctuating flow.

[0010] Furthermore, the motor-water pump assembly includes a motor and a water pump; the motor is connected to the water pump, and the motor is used to drive the water pump.

[0011] Furthermore, the training device also includes a liquid level indicator; the liquid level indicator is connected to the water storage barrel and is used to display the liquid level in the water storage barrel.

[0012] Furthermore, the pipes of the training device are made of PVC material, which has excellent mechanical properties and will not rust after long-term use and storage. The material used will not cause environmental pollution and meets the safety and environmental protection management requirements of nuclear power plants.

[0013] Furthermore, the pipeline between the electronic flow meter and the water storage barrel is arranged above the pipeline between the water storage barrel and the motor water pump assembly.

[0014] Furthermore, the pipeline of the training device includes curved pipes and straight pipes; the water storage tank, motor water pump assembly, pressure gauge, and flow indicator are connected in sequence through straight pipes; the portable ultrasonic flowmeter and electronic flowmeter are connected through straight pipes; the electronic flowmeter and water storage tank are connected through straight pipes; and the flow indicator and portable ultrasonic flowmeter are connected through curved pipes.

[0015] Furthermore, the elbow between the flow indicator and the portable ultrasonic flowmeter includes a straight section; one end of the portable ultrasonic flowmeter is connected to the straight section of the elbow;

[0016] Furthermore, the length of the straight section of the elbow between the flow indicator and the portable ultrasonic flowmeter is greater than 10 times the pipe diameter; the length of the pipe between the electronic flowmeter and the portable ultrasonic flowmeter is greater than 5 times the pipe diameter.

[0017] Furthermore, the flow rate of the water pump is 2.18-20m 3 / h.

[0018] Furthermore, the motor is a 48Vdc motor.

[0019] Furthermore, the water storage barrel is connected to an exhaust pipe for exhausting air when water is added to the water storage barrel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) This technical solution provides an online auxiliary training device for portable ultrasonic flowmeters for nuclear power plants. By using a motor-water pump assembly to extract liquid from a water storage tank to form a stable water flow in a pipeline, it provides an online verification platform for the portable ultrasonic flowmeter. This device can solve problems such as early judgment of measurement function failure of portable ultrasonic flowmeters, lack of appropriate working conditions for ultrasonic flowmeter practical training, easy damage to equipment and personnel during on-site testing and verification, and equipment operation with defects.

[0022] 2) This technical solution provides an online auxiliary training device for portable ultrasonic flowmeters for nuclear power plants. After the portable ultrasonic flowmeter is installed and arranged, the water pump is started to adjust the flow rate. The dynamic flow rate can be compared with the electronic flowmeter to verify the measurement function of the portable ultrasonic flowmeter. The fluctuating flow rate is simulated by the stop valve, providing an online verification platform for the portable ultrasonic flowmeter.

[0023] 3) This technical solution provides an online auxiliary training device for portable ultrasonic flowmeters for nuclear power plants. It has a compact structure, a wide range of materials, a simple structure, and convenient operation. It can achieve online functional verification by building fluid flow measures, has high stability, and eliminates the risk of accidental equipment collision and personal injury. By building a test platform, the verification function can be met in the maintenance workshop, avoiding the risk of personal injury and accidental equipment collision during verification at the nuclear power plant work site. It can form and provide an effective instrument function verification platform, thereby standardizing the work specifications of operators, eliminating work failures and personal and equipment injury risks caused by equipment function failures, and can effectively verify the measurement function and accuracy of portable ultrasonic flowmeters, can promptly discover potential equipment failures of portable ultrasonic flowmeters, can test the stability of ultrasonic flowmeter measurements, can be used as practical operation training for portable ultrasonic flowmeter training auxiliary devices for nuclear power plants, and has a dynamic verification function to effectively improve the availability of ultrasonic flowmeters.

[0024] 4) This technical solution provides an online auxiliary training device for portable ultrasonic flowmeters for nuclear power plants, which will provide a reliable verification platform for the functional verification of this type of instrument, thereby improving work efficiency, avoiding quality risks caused by equipment unreliability, and improving the operating skills of this type of instrument in daily training. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic plan view of the structure of a portable online auxiliary training device for ultrasonic flowmeters for nuclear power plants in an embodiment of the present utility model.

[0026] in:

[0027] 1. Water storage tank; 2. Liquid level indicator; 3. Motor water pump assembly; 4. First stop valve; 5. Check valve; 6. Pressure gauge; 7. Flow indicator; 8. Portable ultrasonic flowmeter; 9. Electronic flowmeter; 10. Second stop valve; 11. Elbow and straight pipe sections. DETAILED DESCRIPTION

[0028] The following is a detailed description of the present invention with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0029] In this utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements; "up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0030] It should be noted that, in the present invention, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0031] The present invention will be described in further detail below with reference to specific embodiments.

[0032] Example

[0033] like Figure 1 As shown, in this embodiment, an online auxiliary training device for a portable ultrasonic flowmeter for a nuclear power plant is provided, which is used to verify the measurement function of a portable ultrasonic flowmeter 8 .

[0034] The training device includes a water storage bucket 1, a liquid level indicator 2, a motor water pump assembly 3, a first stop valve 4, a check valve 5, a pressure gauge 6, a flow indicator 7, an electronic flow meter 9, and a second stop valve 10.

[0035] The water storage barrel 1, the motor water pump assembly 3, the pressure gauge 6, the flow indicator 7, the portable ultrasonic flow meter 8, and the electronic flow meter 9 are connected in sequence through pipes, and the other side of the electronic flow meter 9 is connected back to the water storage barrel 1 through a pipe.

[0036] The motor water pump assembly 3 is used to extract the liquid in the water storage tank 1 to form a water flow in the pipeline; the pressure gauge 6 is used to measure the pressure in the pipeline; the flow indicator 7 is used to observe the liquid flow in the pipeline on one side of the portable ultrasonic flowmeter 8; the electronic flowmeter 9 is used to detect the flow in the pipeline on the other side of the portable ultrasonic flowmeter 8.

[0037] The first stop valve 4 is arranged on the pipeline between the motor water pump assembly 3 and the check valve 5; the second stop valve 10 is arranged on the pipeline between the electronic flow meter 9 and the water storage tank 1; the first stop valve 4 and the second stop valve 10 are used to simulate fluctuating flow.

[0038] The check valve 5 is provided on the pipeline between the first stop valve 4 and the pressure gauge 6 ; the check valve 5 is used to prevent the liquid from flowing back to the motor water pump assembly 3 .

[0039] The motor-water pump assembly 3 includes a motor and a water pump; the motor is connected to the water pump, and the motor is used to drive the water pump. Driving the water pump by a motor is a conventional technical means for those skilled in the art, and this application does not improve the setting form and working principle.

[0040] The liquid level indicator 2 is connected to the water storage barrel 1 and is used to display the liquid level in the water storage barrel 1. The liquid level indicator 2 used in this application is a conventional liquid level indicator (water level gauge), such as a magnetic liquid level gauge.

[0041] The pipe of the training device is made of PVC.

[0042] The electronic flowmeter 9 is a flowmeter composed of a sensor and a converter based on Faraday's law of electromagnetic induction, and a commercially available pipeline electromagnetic flowmeter can be used.

[0043] The pipe between the electronic flowmeter 9 and the water storage barrel 1 is arranged above the pipe between the water storage barrel 1 and the motor water pump assembly 3, and the height of the water inlet end of the water pump of the motor water pump assembly 3 is lower than the height of the water outlet end after passing through the electronic flowmeter 9.

[0044] The pipelines of the training device include curved pipes and straight pipes; the water storage tank 1, motor water pump assembly 3, first stop valve 4, check valve 5, pressure gauge 6, and flow indicator 7 are connected in sequence through straight pipes; the portable ultrasonic flowmeter 8, electronic flowmeter 9, second stop valve 10, and water storage tank 1 are connected in sequence through straight pipes; the flow indicator 7 and portable ultrasonic flowmeter 8 are connected through curved pipes.

[0045] The bend between the flow indicator 7 and the portable ultrasonic flowmeter 8 includes a straight section 11; one end of the portable ultrasonic flowmeter 8 is connected to the straight section 11;

[0046] The length of the straight pipe section 11 of the elbow between the flow indicator 7 and the portable ultrasonic flowmeter 8 is greater than 10 times the pipe diameter (inner diameter); the length of the pipe between the electronic flowmeter 9 and the portable ultrasonic flowmeter 8 is greater than 5 times the pipe diameter (inner diameter), that is: the two probes of the portable ultrasonic flowmeter 8 are installed in the straight pipe section of the pipeline, and the installation distance should be selected within a uniform straight pipe section without any valves, elbows, reducers, etc., which is greater than 10 times the straight pipe diameter upstream and greater than 5 times the straight pipe diameter downstream. The installation point should be well away from interference sources such as valves, pumps, high voltage electricity and frequency converters. The pipe diameter of the probe is DN15~200mm when installing. When installing the probe, pay attention to the horizontal alignment of the two probes, and their center lines are horizontal with the pipeline axis. The installation method of the portable ultrasonic flowmeter 8 adopts the existing installation method, and the V method (standard V method) can be selected.

[0047] The flow rate of the water pump is 2.18-20m 3 / h.

[0048] The motor is a 48Vdc motor.

[0049] The water storage barrel 1 is connected to an exhaust pipe for exhausting air when water is added to the water storage barrel 1 .

[0050] The working method of the portable ultrasonic flowmeter online auxiliary training device for nuclear power plants includes the following steps:

[0051] 1. Fill the water storage tank 1 with sufficient water.

[0052] 2. Power on the motor and electronic flowmeter 9 of the motor water pump assembly 3.

[0053] 3. Open the outlet valve (first stop valve 4) of the water pump of the motor water pump assembly 3 and the drain valve (second stop valve 10) of the water storage tank 1.

[0054] 4. Open the root valve of the pressure gauge 6 and check that the flow indicator 7 is not stuck.

[0055] 5. Install a portable ultrasonic flow meter8.

[0056] 6. Start the water pump of the motor water pump assembly 3, and check that there is pressure and flow at the water pump outlet through the pressure gauge 6 and flow indicator 7, and that the water can circulate normally.

[0057] 7. Set the parameters of the portable ultrasonic flowmeter 8 (the parameters of the portable ultrasonic flowmeter are set according to the pipeline parameters. The specific setting method and process are conventional technical means of those skilled in the art, such as the content recorded in "The Influence of Pipeline Parameters on the Measurement of Portable Ultrasonic Flowmeter" by Hu Jiangshun and He Songjie. This application aims to provide the hardware structure of an online auxiliary training device for portable ultrasonic flowmeters for nuclear power plants, and does not improve the parameter setting method). After the setting is completed, enter the measurement state to observe the measurement data. The availability and accuracy of the instrument can be verified by comparing with the electronic flowmeter 9. By adjusting the first stop valve 4 and the second stop valve 10, the fluctuating flow rate can be simulated.

[0058] 8. After the test is completed, turn off the water pump and remove the portable ultrasonic flow meter 8.

[0059] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. An online auxiliary training device for a portable ultrasonic flowmeter for a nuclear power plant, used for verifying the measurement function of a portable ultrasonic flowmeter (8), characterized in that: The training device comprises a water storage bucket (1), a motor water pump assembly (3), a pressure gauge (6), a flow indicator (7), and an electronic flow meter (9); The water storage barrel (1), the motor water pump assembly (3), the pressure gauge (6), the flow indicator (7), the portable ultrasonic flow meter (8), and the electronic flow meter (9) are sequentially connected via pipelines; The electronic flow meter (9) is connected to the water storage tank (1) via a pipeline; The motor water pump assembly (3) is used to extract the liquid in the water storage barrel (1) to form a water flow in the pipeline; The pressure gauge (6) is used to measure the pressure in the pipeline; The flow indicator (7) is used to observe the flow of liquid in a pipe on one side of the portable ultrasonic flow meter (8); The electronic flow meter (9) is used to detect the flow in the pipeline on the other side of the portable ultrasonic flow meter (8).

2. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 1 is characterized in that: The training device further comprises a check valve (5); The check valve (5) is used to prevent liquid from flowing back into the motor water pump assembly (3).

3. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 2 is characterized in that: The training device further comprises a first stop valve (4) and a second stop valve (10); The first stop valve (4) is provided on the pipeline between the motor water pump assembly (3) and the check valve (5); The second stop valve (10) is provided on the pipeline between the electronic flow meter (9) and the water storage tank (1); The first stop valve (4) and the second stop valve (10) are used to simulate fluctuating flow.

4. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 1 is characterized in that: The motor-water pump assembly (3) comprises a motor and a water pump; The motor is connected to the water pump and is used to drive the water pump.

5. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 1 is characterized in that: The training device further comprises a liquid level indicator (2); The liquid level indicator (2) is connected to the water storage barrel (1) and is used to display the liquid level in the water storage barrel (1).

6. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 1 is characterized in that: The pipe of the training device is made of PVC.

7. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 1 is characterized in that: The pipeline between the electronic flow meter (9) and the water storage barrel (1) is arranged above the pipeline between the water storage barrel (1) and the motor water pump assembly (3).

8. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 1 is characterized in that: The pipes of the training device include curved pipes and straight pipes; The water storage barrel (1), the motor water pump assembly (3), the pressure gauge (6), and the flow indicator (7) are connected in sequence through straight pipes; The portable ultrasonic flowmeter (8) and the electronic flowmeter (9) are connected via a straight pipe; The electronic flow meter (9) and the water storage tank (1) are connected via a straight pipe; The flow indicator (7) and the portable ultrasonic flow meter (8) are connected via a curved pipe.

9. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 8, characterized in that: The elbow between the flow indicator (7) and the portable ultrasonic flow meter (8) includes an elbow straight pipe section (11); One end of the portable ultrasonic flowmeter (8) is connected to the elbow straight pipe section (11).

10. The portable ultrasonic flowmeter online auxiliary training device for nuclear power plants according to claim 9, characterized in that: The length of the straight pipe section (11) of the elbow between the flow indicator (7) and the portable ultrasonic flow meter (8) is greater than 10 times the pipe diameter; The length of the pipeline between the electronic flow meter (9) and the portable ultrasonic flow meter (8) is greater than 5 times the diameter of the pipeline.

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