Gas loop instrument testing system and testing equipment

Abstract

The utility model relates to the technical field of special equipment, and discloses a gas loop instrument test system and test equipment. The device comprises a base, a connecting pipeline and a testing mechanism, the connecting pipeline is installed on the base, the connecting pipeline comprises an inlet connector used for being connected with an external air source, the testing mechanism is communicated with the connecting pipeline, the testing mechanism comprises a plurality of testing positions and a plurality of testing units, and the testing positions are used for installing a plurality of instruments to be tested to obtain actual values; the test unit is used for providing a reference value and comparing the reference value with an actual value. According to the invention, the testing mechanism and the connecting pipeline are integrated and installed on the base, so that the to-be-tested instrument can be tested nearby. Moreover, the connection pipeline is provided with a plurality of test positions for the installation of the instruments to be tested, and a plurality of instruments can be tested synchronously, thereby avoiding the situations of single verification and factory return test, and improving the test efficiency and test convenience.

Description

Technical Field

[0001] This application relates to the technical field of special equipment, and in particular to a gas circuit instrument testing system and testing equipment. Background Technology

[0002] During normal operation of a nuclear power plant, in order to protect the personal safety of on-site staff and the surrounding public, radioactivity testing systems are installed at certain specific locations within the plant, including airborne radioactivity monitoring systems.

[0003] The airborne radioactivity monitoring system is used to monitor radioactive materials in gaseous pipelines or chimneys of nuclear power plants in real time. It then processes, transmits, and stores the real-time monitoring data. During the calculation process, gas flow and pressure information are crucial, determining the accuracy of the final calculation results. Therefore, gas loop instruments need to be calibrated and replaced regularly to ensure the stable operation of the entire system.

[0004] However, calibrating gas circuit instruments typically requires sending them to a professional testing institution, which involves long transportation times. This presents limitations, making it difficult to conduct timely testing in case of emergencies. Utility Model Content

[0005] Therefore, it is necessary to provide a gas circuit instrument testing system and testing equipment to address the inconvenience, time-consuming nature, and limitations of the aforementioned gas circuit instrument testing.

[0006] In a first aspect, this application provides a gas loop instrument testing system, which adopts the following technical solution:

[0007] A gas loop instrument testing system includes a base, connecting pipes, and a testing mechanism. The connecting pipes are installed on the base and include an inlet connector for connecting to an external gas source. The testing mechanism is connected to the connecting pipes and includes multiple testing positions and multiple testing units. The testing positions are used for installing multiple instruments to be tested to obtain actual values, and the testing units are used to provide reference values ​​and compare them with the actual values.

[0008] In one embodiment, the testing mechanism includes a first testing unit, which includes a first reference component connected to the connecting pipe. The first reference component is used to provide the reference value. The first reference component can be connected in series with a first instrument to be tested via the connecting pipe. The first instrument is used to provide the actual value.

[0009] In one embodiment, the first test unit further includes a pressure reducing valve connected to the connecting pipeline for adjusting the air pressure within the connecting pipeline.

[0010] In one embodiment, the testing mechanism includes a second testing unit, which includes a second reference component connected to the connecting pipe. The second reference component is capable of displaying the reference value and can be connected in series with a second instrument to be tested via the connecting pipe. The second instrument is used to provide the actual value.

[0011] In one embodiment, the second test unit further includes a regulating valve connected to the connecting pipeline for regulating the air pressure within the connecting pipeline.

[0012] In one embodiment, the testing system further includes a switching mechanism, which includes a plurality of switching valves. The switching valves are respectively configured to correspond one-to-one with the first testing unit and / or the second testing unit. The switching valves are connected between the first testing unit and / or the second testing unit and the inlet connector to realize the on / off control of the part of the connecting pipeline connected to the first testing unit and / or the second testing unit.

[0013] In one embodiment, the testing system further includes a fastener, by means of which the connecting conduit can be connected to the base.

[0014] In one embodiment, the testing system further includes a safety valve connected to the inlet connector. The safety valve is used to test the input air pressure input into the testing system and has a preset safety air pressure. The safety valve includes an open state and a closed state. When the input air pressure is greater than the preset safety air pressure, the safety valve is in the open state. When the input air pressure is less than the preset safety air pressure, the safety valve switches to the closed state.

[0015] Secondly, this application provides a testing device, which adopts the following technical solution:

[0016] A testing device includes the aforementioned gas loop instrument testing system and an external gas source. The gas loop instrument testing system is used to test the accuracy of the actual value displayed by the instrument under test. The external gas source is connected to the inlet connector of the gas loop instrument testing system to input gas into the gas loop instrument testing system.

[0017] In one embodiment, the testing equipment further includes a trolley, which includes a body and wheels mounted on the body. The gas circuit instrument testing system and the external gas source are both mounted on the body, and the body can be moved by means of the wheels.

[0018] The aforementioned gas loop instrument testing system integrates the testing mechanism and connecting pipelines on a base, facilitating local testing of the instruments under test. Furthermore, the connecting pipelines have multiple testing positions for mounting the instruments, enabling simultaneous testing of multiple instruments. This avoids the need for individual calibration and factory return testing, improving testing efficiency and convenience. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a gas loop instrument testing system according to an embodiment of this application.

[0020] Figure 2 This is a three-dimensional structural diagram of the test equipment in one embodiment of this application.

[0021] Attached image annotations:

[0022] 1. Base; 2. Connecting pipe; 21. Inlet connector; 22. Air pressure pipe; 23. Flow pipe; 3. Testing mechanism; 31. First testing unit; 311. First reference component; 312. Pressure reducing valve; 32. Second testing unit; 321. Second reference component; 322. Regulating valve; 4. First instrument; 5. Second instrument; 6. Switching valve; 7. Fixing component; 8. Safety valve; 9. External air source; 10. Cart; 101. Body; 102. Wheel. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply 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 this application.

[0025] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] Furthermore, if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Where applicable, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0029] Based on relevant technologies, it is known that during the normal operation of a nuclear power plant, in order to protect the personal safety of on-site personnel and the safety of the surrounding environment, radioactivity testing system equipment is installed in certain specific locations of the nuclear power plant, including airborne radioactivity monitoring system devices.

[0030] Specifically, the airborne radioactivity monitoring system is mainly used to monitor gaseous radioactive sources or materials in the gas pipelines or chimneys of nuclear power plants in real time. The system then processes, transmits, and stores the real-time monitoring data. During the calculation process, gas flow rate and pressure information are key factors that determine the accuracy of the final calculation results. Therefore, gas loop instruments (mainly flow meters, pressure gauges, etc.) need to be calibrated and replaced regularly to ensure the stable and safe operation of the entire system.

[0031] Typically, the calibration and verification of gas loop instruments requires transporting them to specialized testing facilities or returning them to the factory for testing, which consumes a significant amount of time during transportation. Furthermore, in the event of unforeseen circumstances, it is difficult to promptly transport potentially faulty gas loop instruments to specialized testing facilities for inspection, resulting in delays in calibration work and presenting certain limitations. Therefore, there is an urgent need to design a device that can perform gas loop instrument testing anytime and anywhere at nuclear power plant sites.

[0032] The following is in conjunction with the appendix Figure 1-2 The embodiments of this application will be described in further detail.

[0033] See Figure 1 , Figure 1 A schematic diagram of a gas loop instrument testing system according to an embodiment of this application is shown. This application provides a gas loop instrument testing system, specifically an integrated gas loop instrument testing system. The testing system includes a base 1, a connecting pipe 2, and a testing mechanism 3. The connecting pipe 2 is installed on the mounting surface of the base 1, and the testing mechanism 3 is connected to the connecting pipe 2. The connecting pipe 2 includes an inlet connector 21, which is used to connect to an external gas source 9 to supply gas to the entire testing system.

[0034] In this embodiment, on the one hand, both the connecting pipe 2 and the testing mechanism 3 are mounted on the base 1. The base 1 supports the connecting pipe 2 and the testing mechanism 3, so that the connecting pipe 2 can be arranged in a relatively regular manner on the mounting surface, which makes it easier for the operator to quickly locate the corresponding pipe during actual testing, thereby improving testing efficiency.

[0035] Specifically, the testing mechanism 3 includes multiple testing positions, which are distributed at intervals along the extension direction of the connecting pipe 2. The testing positions are used for the installation of instruments to be tested, so as to realize the synchronous testing of the performance of multiple instruments, avoiding the problem of low testing efficiency caused by testing a single instrument individually, and improving the actual testing efficiency.

[0036] Continue reading Figure 1 In some embodiments, the testing mechanism 3 includes a first testing unit 31, the first testing unit 31 includes a first reference component 311 connected to the connecting pipe 2, the first instrument 4 is installed at the testing position corresponding to the first testing unit 31, and the first reference component 311 can be connected in series with the first instrument 4 through the connecting pipe 2.

[0037] In this embodiment, the first reference element 311 is specifically a reference pressure gauge, and the first instrument 4 is specifically a pressure gauge to be measured. The first reference element 311 and the first instrument 4 are connected in series to the same section of connecting pipe 2. When gas flows through the connecting pipe 2 and generates air pressure, the first reference element 311 and the first instrument 4 are actually detecting the air pressure of the same section of connecting pipe 2.

[0038] At this point, the operator can determine whether the test error of the first instrument 4 meets the requirements by comparing the air pressure data difference detected by the first reference component 311 and the first instrument 4, thereby determining whether the first instrument 4 is accurate and completing the calibration work of the first instrument 4.

[0039] Furthermore, in some other embodiments, the first test unit 31 also includes a pressure reducing valve 312 connected to the connecting pipe 2, which is used to regulate the gas pressure in the connecting pipe 2. After the test is completed, the remaining gas in the connecting pipe 2 can be released by opening the pressure reducing valve 312.

[0040] In addition, during the test, the operator can also adjust the pressure in the connecting pipe 2 through the pressure reducing valve 312. That is, during the test, the operator first selects multiple pressure nodes in the connecting pipe 2, and then compares the pressure data difference between the first reference component 311 and the first instrument 4 at different pressure nodes. Finally, the operator judges whether the obtained pressure data difference is within the error range. By comparing multiple sets of data, the accuracy of the calibration work of the first instrument 4 can be improved.

[0041] In some other embodiments, the testing mechanism 3 further includes a second testing unit 32, which includes a second reference component 321 connected to the connecting pipe 2. The second instrument 5 is installed at the testing position corresponding to the second testing unit 32, and the second reference component 321 can be connected in series with the second instrument 5 through the connecting pipe 2.

[0042] In this embodiment, the second reference element 321 is specifically a reference flow meter, and the second instrument 5 is specifically a flow meter to be measured. The second instrument 5 and the second reference element 321 are connected in series to the same section of the connecting pipe 2. When there is airflow in the connecting pipe 2, the second reference element 321 and the second instrument 5 detect the gas flow rate in the same section of the connecting pipe 2.

[0043] It is understandable that the second reference component 321 displays a reference flow rate value. Therefore, during the test, the operator can determine whether the test error of the second instrument 5 under test is within the error range by comparing the difference between the flow rate data detected by the second reference component 321 and the second instrument 5. Based on this, the operator can determine whether the test error of the second instrument 5 meets the requirements, determine whether the second instrument 5 is accurate, and thus complete the calibration work of the second instrument 5.

[0044] In some other embodiments, the second test unit 32 further includes a regulating valve 322, which is connected to the second reference member 321 and the second instrument 5, for adjusting the air pressure inside the connecting pipe 2 where the second test unit 32 is located.

[0045] During the test, the operator can adjust the internal air pressure of the connecting pipe 2 using the regulating valve 322 to obtain the flow difference data of the second reference component 321 and the second instrument 5 under different air flow conditions, thereby improving the accuracy of the test results. In addition, after the test, the operator can also use the regulating valve 322 to discharge the remaining high-pressure gas in the connecting pipe 2.

[0046] It is understood that in some other embodiments, the testing mechanism 3 may also include a third testing unit (not shown), a fourth testing unit (not shown), and more testing units. In practical applications, the operator can deploy the corresponding number of testing units according to the actual number of instruments to be tested, consider multi-loop testing schemes, be compatible with test loops for different instruments, and avoid the decrease in testing and production efficiency caused by the calibration and return of a single instrument.

[0047] See Figure 1As shown, in some embodiments, the connecting pipe 2 specifically includes a pressure pipe 22, a flow pipe 23, and the aforementioned inlet connector 21. The inlet connector 21 connects the gas loop instrument testing system to an external gas source 9 to supply gas to the gas loop instrument testing system. The pressure pipe 22 connects the first testing unit 31 and the inlet connector 21, and the flow pipe 23 connects the second testing unit 32 and the inlet connector 21.

[0048] In this embodiment, the pressure pipe 22 is specifically a straight pipe running vertically through the pipe, and the flow pipe 23 is specifically a corrugated pipe of a certain length. The second instrument 5 and the second reference component 321 are connected by the corrugated pipe, and a certain distance is left between the second instrument 5 and the second reference component 321 for the installation of the corrugated pipe, so that the gas can be detected by the second instrument 5 or the second reference component 321 only after flowing through a pipe of a sufficient length, thereby improving the accuracy of the detection results.

[0049] During actual testing, the gas input into the gas loop instrument testing system via the inlet connector 21 can be transmitted to the first test unit 31 and the second test unit 32 via the pressure pipe 22 and the flow pipe 23 respectively, thereby realizing the synchronous detection function of the instruments under test installed on different test units.

[0050] In some embodiments, in order to improve the stability of the connection between the connecting pipe 2 and the base 1, the gas circuit instrument testing system further includes a fixing member 7. The fixing member 7 includes multiple snap-fit ​​parts, all of which are spaced apart along the extension direction of the connecting pipe 2, and fix the connecting pipe 2 to the mounting surface of the base 1.

[0051] In this embodiment, the snap-fit ​​part specifically includes a clamp and a fixing bolt. The side of the clamp facing the mounting surface has a clearance groove for the connecting pipe 2 to pass through. The fixing bolt is used to fix the clamp to the base 1, so that the connecting pipe 2 is pressed and fixed to the base 1, thereby fixing the position of the connecting pipe 2.

[0052] This fixing method enables detachable fixing between the connecting pipe 2 and the base 1. On the one hand, the relative position between the connecting pipe 2 and the base 1 is fixed, making it less likely for the connecting pipe 2 and the first test unit 31 and the second test unit 32 installed on the connecting pipe 2 to fall off the base 1 during transportation, thus realizing the integrated design and installation of the test system.

[0053] On the other hand, during the transportation process, the connecting pipes 2 can be neatly arranged on the installation surface, which makes it easy for the operator to quickly find the corresponding test position during the actual test and improves the test efficiency.

[0054] In addition, the neat arrangement of the connecting pipes 2 on the mounting surface can prevent the connecting pipes 2 from twisting or getting tangled during transportation, effectively reducing the problem of inaccurate testing caused by blockage of the connecting pipes 2 during subsequent testing.

[0055] In some other embodiments, the test system further includes a switching mechanism, which comprises multiple switching valves 6. In this embodiment, since the above embodiments only show the test mechanism 3 including a first test unit 31 and a second test unit 32, only two switching valves 6 are arranged in each gas circuit instrument test system as an example for description. In this embodiment, the switching valve 6 is specifically a shut-off valve.

[0056] Specifically, the two switching valves 6 are respectively set to the first test unit 31 and the second test unit 32 mentioned above, so as to realize the on / off control of the air passage inside the air pressure pipe 22 and / or flow pipe 23 corresponding to the first test unit 31 and / or the second test unit 32.

[0057] During actual testing, the operator installs the instrument under test (DUT) at the corresponding test position in the first test unit 31 and / or the second test unit 32. Then, the operator opens the switching valve 6 corresponding to that test position and closes the switching valves 6 of other positions where the DUT is not installed. This ensures that the gas flowing into the connecting pipe 2 via the inlet connector 21 can only reach the test position where the DUT is installed, reducing the possibility of gas overflowing from other disconnected test positions and causing abnormal fluctuations in the internal pressure or flow rate of the connecting pipe 2, thereby improving the accuracy of the test results.

[0058] Continue reading Figure 1 As shown, the gas circuit instrument testing system also includes a safety valve 8 connected to the inlet connector 21. The safety valve 8 is used to test the input gas pressure input into the testing system. The safety valve 8 has a preset safety gas pressure, and the specific value of the preset safety gas pressure can be set by the operator according to the actual working conditions on site.

[0059] In this embodiment, the safety valve 8 includes an open state and a closed state, and the safety valve 8 can switch between the open state and the closed state according to the input air pressure input to the test system.

[0060] Specifically, when the input air pressure is greater than the preset safety air pressure, the safety valve 8 is in the open state, releasing part of the input gas until the input air pressure drops to the same level as the preset safety air pressure; when the input air pressure is less than the preset air pressure, the safety valve 8 will switch to the closed state, and the external air source 9 will continuously inject the gas used for testing into the test system through the inlet connector 21.

[0061] By setting safety valve 8, excess gas can be released in time, ensuring that when the input pressure is higher than the allowable value (i.e., the preset safety pressure), the gas can be discharged to achieve the pressure relief effect, preventing the entire test system from being damaged due to high pressure.

[0062] Combination Figure 1 and Figure 2 As shown, Figure 2 A three-dimensional structural schematic diagram of a testing device according to one embodiment of this application is shown. In some embodiments, this application also provides a testing device, which is mainly used in nuclear power-related scenarios to calibrate instruments in the scenarios.

[0063] Specifically, the testing equipment includes the gas loop instrument testing system described in any of the above embodiments and an external gas source 9. The external gas source 9 is connected to the inlet connector 21 of the gas loop instrument testing system for inputting gas into the gas loop instrument testing system.

[0064] In some other embodiments, in order to facilitate the movement of the gas circuit instrument testing system to different testing environments for instrument testing, the testing equipment also includes a trolley 10, which includes a body 101, a handle connected to the body 101, and wheels 102 installed at the bottom of the body 101. The gas circuit instrument testing system and the external gas source 9 are both installed on the body 101.

[0065] During actual testing, the operator can use the handles and wheels 102 to push the vehicle body 101 to move the test equipment to the appropriate working environment. This reduces on-site troubleshooting time, improves equipment calibration efficiency, avoids unit shutdowns due to critical equipment failures, and minimizes the impact on unit power generation.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A gas circuit instrument test system, characterized in that: The test system comprises: Pedestal; A connecting pipeline is installed on the base, and the connecting pipeline includes an inlet connector for connecting to an external gas source; and A testing mechanism is connected to the connecting pipeline, and the testing mechanism includes multiple testing positions and multiple testing units. The testing positions are used for installing multiple instruments to be tested to obtain actual values, and the testing units are used for providing reference values ​​and comparing them with the actual values.

2. The gas circuit instrument test system according to claim 1, characterized in that: The testing mechanism includes a first testing unit, which includes a first reference member connected to the connecting pipeline, the first reference member is used to provide the reference value, the first reference member can be connected in series with a first instrument to be tested via the connecting pipeline, and the first instrument is used to provide the actual value.

3. The gas circuit instrument test system according to claim 2, characterized in that: The first testing unit further includes a pressure reducing valve, which is connected to the connecting pipeline and is used to adjust the air pressure in the connecting pipeline.

4. The gas circuit instrument test system according to any one of claims 2 or 3, characterized in that: The testing mechanism includes a second testing unit, which includes a second reference piece connected to the connecting pipeline, the second reference piece can show the reference value, the second reference piece can be connected in series with a second instrument to be tested via the connecting pipeline, and the second instrument is used to provide the actual value.

5. The gas circuit instrument test system according to claim 4, characterized in that: The second testing unit further includes a regulating valve, which is connected to the connecting pipeline and is used to adjust the air pressure in the connecting pipeline.

6. The gas circuit instrument test system according to claim 4, characterized in that: The test system also includes a switching mechanism, which includes a plurality of switching valves, each of which is arranged corresponding to the first test unit and / or the second test unit, and the switching valve is connected between the first test unit and / or the second test unit and the inlet joint to realize on-off control of the part of the connecting pipeline connected to the first test unit and / or the second test unit.

7. The gas circuit instrument test system according to claim 1, characterized in that: The test system further comprises a fixing member, by means of which the connecting pipeline can be connected to the base.

8. The gas circuit instrument test system according to claim 1, characterized in that: The test system further comprises a safety valve connected to the inlet joint, the safety valve is used to test the input air pressure input into the test system, and the safety valve has a preset safety air pressure; Wherein, the safety valve includes an open state and a closed state; when the input air pressure is greater than the preset safety air pressure, the safety valve is in the open state; when the input air pressure is less than the preset safety air pressure, the safety valve switches to the closed state.

9. A testing device, characterized in that: include: A gas circuit instrument test system as claimed in any one of claims 5 to 8, used to test the accuracy of an actual value shown by an instrument to be tested; and An external gas source is connected to the inlet joint of the gas loop instrument test system to input gas into the gas loop instrument test system.

10. The testing device according to claim 9, characterized in that The test equipment also includes a cart, which includes a body and wheels installed on the body. The gas loop instrument test system and the external gas source are both installed on the body, and the body can be moved by means of the wheels.

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