Containment sealing performance detection and verification system

Abstract

The invention relates to the technical field of nuclear facility sealing detection, and discloses a containment sealing detection and verification system, which comprises a gas path input joint, an automatic regulating valve, a first mass flow meter, a second mass flow meter and a gas path output joint which are connected in sequence, the gas path input connector is connected with an air outlet of the containment; the upper computer analysis subsystem controls the automatic adjusting valve to be opened to a preset opening degree, obtains flow information detected by the first mass flow meter and the second mass flow meter, and stores and displays the flow information in real time. According to the invention, the dual mass flow meters are arranged, hot redundancy setting is provided, self-verification is realized, and the test reliability is improved; by arranging the automatic regulating valve, accurate control over the air discharge flow is achieved, the output flow is made to be rapid and stable, and the rapid responsiveness of the test is remarkably improved; the upper computer analysis subsystem is used for automatically controlling the automatic regulating valve and collecting flow parameters in real time, and an intelligent verification platform for verifying the containment sealing performance detection test is built.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear facility sealing detection, and in particular to a containment sealing detection and verification system. Background Art

[0002] In order to ensure public safety, it is generally necessary to conduct a sealing test on the containment in a nuclear power plant to evaluate whether the sealing of the containment meets the design requirements. In order to verify the effectiveness of the sealing test results, a verification test is required to confirm it. The operation of the existing verification test is: set a penetration at an appropriate position of the containment, install a flow control valve that can be manually fine-tuned on the penetration, manually open and adjust the flow control valve, so that part of the air is discharged from the containment; the flow through the flow control valve can be measured by a calibrated flow meter. If the difference between the verified test data and the sealing test result is less than the set value, the result of the sealing test is considered acceptable, otherwise the cause should be found, corrective measures should be taken, and the verification test should be repeated.

[0003] According to the specification requirements, "from the end of the sealing test to the start of the verification test, the collection of test data should not be interrupted, and the flow rate should be kept stable. The verification test should last at least four hours"; the above specification requirements place extremely high demands on the reliability, responsiveness and accuracy of the verification test equipment.

[0004] Currently, verification test equipment in the industry usually uses flow meters to directly measure gas flow to detect leaks in the containment. The equipment has poor reliability, difficulty in fine-tuning the flow, and difficulty in online real-time verification. When the verification test equipment fails, manual intervention and maintenance are required, resulting in test interruption, which brings great technical risks to the entire verification test. Summary of the invention

[0005] In view of this, the present invention provides a containment sealing detection and verification system to solve the problem that "the existing verification test equipment uses a flow meter to directly measure the gas flow to detect leaks in the containment, the verification test equipment has poor reliability, it is difficult to fine-tune the flow, and online real-time verification is difficult; when the verification test equipment fails, manual intervention and maintenance are required, resulting in interruption of the verification test, which brings great technical risks to the entire verification test."

[0006] The present invention provides a containment sealing detection and verification system, comprising:

[0007] An air circuit input connector, the input end of which is suitable for connection with an air exhaust port provided on the containment vessel;

[0008] An automatic regulating valve connected to the output end of the gas circuit input connector; the automatic regulating valve is suitable for regulating flow;

[0009] A first mass flow meter connected to the automatic regulating valve; the first mass flow meter is suitable for detecting flow;

[0010] a second mass flow meter connected to the first mass flow meter; the second mass flow meter is suitable for detecting flow;

[0011] An air circuit output connector, the input end of which is connected to the second mass flow meter; the output end of the air circuit output connector is suitable for connecting to a ventilation and filtering system;

[0012] The host computer analysis subsystem is signal-connected to the automatic regulating valve, the first mass flow meter, and the second mass flow meter; the host computer analysis subsystem is suitable for real-time controlling the automatic regulating valve to open to a preset opening and real-time acquiring the flow information data detected by the first mass flow meter and the second mass flow meter, and real-time storing and displaying the flow information data. Beneficial effects: This application adopts the above technical solution, by setting up dual mass flow meters, providing thermal redundancy settings, realizing self-verification, and improving the reliability of the test; by setting up an automatic control valve, accurate control of the discharge flow can be achieved without human intervention, so that the output flow is rapidly stabilized, and the rapid responsiveness of the test is significantly improved; through the automatic control of the automatic control valve and the real-time collection of flow parameters by the host computer analysis subsystem, an intelligent verification platform for verifying the containment sealing test is established; through the host computer analysis subsystem, online real-time intelligent analysis and control are performed to realize the verification function of the intelligent detection flow of the containment sealing; it has the advantages of high measurement accuracy, fast response speed, stable data acquisition and wide application range, reduces the risk of failure of the containment sealing detection verification test, improves the success rate of the containment sealing detection verification test, and provides escort for the accurate evaluation of the containment sealing performance.

[0013] Optionally, the containment sealing detection and verification system adjusts the air flow to be stable within a set time by an automatic regulating valve. Beneficial effect: The present application adopts the above technical solution to ensure rapid containment sealing detection and verification and improve test efficiency.

[0014] Optionally, the first mass flow meter and the second mass flow meter have the same specifications. Beneficial effects: The present application adopts the above technical solution, and by setting two mass flow meters of the same specifications, not only thermal redundancy is provided for the test, but also mutual verification of the test results can be achieved.

[0015] Optionally, the flow detection range of the first mass flow meter and the second mass flow meter is: 0L / min~1000L / min.

[0016] Optionally, it also includes:

[0017] The signal processing module has an input interface connected to the automatic regulating valve, the signal interface of the first mass flow meter, and the signal interface of the second mass flow meter; and the output interface of the signal processing module is connected to the host computer analysis subsystem through a communication interface.

[0018] Optionally, it also includes:

[0019] The power supply module is connected to the power supply interface of the first mass flow meter, the power supply interface of the second mass flow meter, the power supply interface of the automatic regulating valve, and the power supply interface of the signal processing module through a power switch. Beneficial effect: The present application adopts the above technical solution to provide a reliable power supply through the power supply module.

[0020] Optionally, the gas circuit input connector, the automatic regulating valve, the first mass flow meter, the second mass flow meter and the gas circuit output connector are all connected via a gas pipeline.

[0021] Optionally, the inner diameter of the gas pipeline is 14 mm.

[0022] Optionally, the host computer analysis subsystem is an industrial computer.

[0023] Optionally, the signal processing module is suitable for collecting 4mA-20mA analog signals or converting digital signals into RS485 communication mode. Beneficial effects: The present application adopts the above technical solution, and by converting digital signals into RS485 communication mode, the digital collection of flow parameters can be realized, and the long-distance transmission of flow signals can be effectively realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a connection diagram of the containment sealing detection and verification system provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Gas input connector; 2. Automatic regulating valve; 3. First mass flow meter; 4. Second mass flow meter; 5. Gas output connector; 6. Signal processing module; 7. Communication interface; 8. Power supply module; 9. Power switch; 10. Gas pipeline; 11. Industrial computer. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] like Figure 1 A specific implementation of the containment sealing detection and verification system shown includes: a gas circuit input connector 1, an automatic regulating valve 2, a first mass flow meter 3, a second mass flow meter 4, a gas circuit output connector 5, a host computer analysis subsystem, a signal processing module 6 and a power supply module 8. The containment sealing detection and verification system described in the present application is used to verify the accuracy of the containment sealing detection result.

[0030] Among them, the gas circuit input connector 1, the automatic regulating valve 2, the first mass flow meter 3, the second mass flow meter 4 and the gas circuit output connector 5 constitute a gas circuit subsystem, and all gas circuit connections are sealed. The gas circuit input connector 1, the automatic regulating valve 2, the first mass flow meter 3, the second mass flow meter 4, the gas circuit output connector 5, the signal processing module 6 and the power supply module 8 can be integrated and packaged together.

[0031] The input end of the gas circuit input connector 1 is suitable for connecting with the air exhaust port provided on the containment. The automatic regulating valve 2 is connected with the output end of the gas circuit input connector 1; the automatic regulating valve 2 is suitable for regulating flow. The first mass flowmeter 3 is connected with the automatic regulating valve 2; the first mass flowmeter 3 is suitable for detecting flow. The second mass flowmeter 4 is connected with the first mass flowmeter 3; the second mass flowmeter 4 is suitable for detecting flow. The input end of the gas circuit output connector 5 is connected with the second mass flowmeter 4; the output end of the gas circuit output connector 5 is suitable for connecting with the ventilation and filtration system. The upper computer analysis subsystem is signal-connected with the automatic regulating valve 2, the first mass flowmeter 3, and the second mass flowmeter 4; the upper computer analysis subsystem is suitable for real-time control of the automatic regulating valve 2 to open to a preset opening and real-time acquisition of flow information data detected by the first mass flowmeter 3 and the second mass flowmeter 4, and real-time storage and display of the flow information data. Specifically, the upper computer analysis subsystem can be an industrial control computer 11; the industrial control computer 11 is a portable industrial control computer installed with dedicated automatic acquisition control software. The containment sealing detection and verification system described in the present application adopts an integrated and portable design and can be widely used in containment sealing detection flow verification tests in nuclear power plants.

[0032] Furthermore, the containment sealing detection and verification system adjusts the air flow to be stable within a set time not longer than the set time through the automatic regulating valve 2. The set time may be 1 hour.

[0033] Further, the specifications of the first mass flow meter 3 and the second mass flow meter 4 are the same. Specifically, the flow detection range of the first mass flow meter 3 and the second mass flow meter 4 is: 0L / min~1000L / min; or the flow detection range of the first mass flow meter 3 and the second mass flow meter 4 is matched with the applicable range according to the actual situation.

[0034] Specifically, the gas circuit input connector 1, the automatic regulating valve 2, the first mass flow meter 3, the second mass flow meter 4 and the gas circuit output connector 5 are all connected through a gas pipeline 10. The gas pipeline 10 is a hard pipe with an inner diameter of 14 mm.

[0035] Furthermore, when the containment sealing detection and verification system further includes: a signal processing module 6, the input interface of the signal processing module 6 is connected to the signal interface of the automatic regulating valve 2, the first mass flowmeter 3, and the signal interface of the second mass flowmeter 4; the output interface of the signal processing module 6 is connected to the host computer analysis subsystem via the communication interface 7. The signal processing module 6 is suitable for collecting 4mA to 20mA analog signals or converting digital signals into RS485 communication mode.

[0036] Furthermore, when the containment sealing detection and verification system further includes: a power supply module 8, the power supply module 8 is connected to the power supply interface of the first mass flow meter 3, the power supply interface of the second mass flow meter 4, the power supply interface of the automatic regulating valve 2, and the power supply interface of the signal processing module 6 through a power switch 9. The signal processing module 6, the power supply module 8, the communication interface 7 and the power switch 9 constitute a circuit subsystem.

[0037] The working principle of the containment sealing detection and verification system described in the present application is briefly described as follows: when conducting a containment sealing detection flow verification test, first turn on the power switch 9, connect the air outlet provided on the containment with the gas input connector 1, connect the communication interface 7 with the industrial computer 11, turn on the industrial computer 11, and the automatic regulating valve 2 is opened according to the preset opening, and automatically adjusted to a stable flow within 1 hour. The test air output from the containment is in the gas pipeline 10 according to the specified flow, and passes through the first mass flow meter 3, the second mass flow meter 4 and the gas output connector 5 in sequence, and the gas output connector 5 is connected to the ventilation and filtration system to complete the air discharge. In a test cycle of not less than four hours, the present application continuously and automatically collects flow data through a portable industrial control computer equipped with special automatic acquisition control software, and converts, displays, stores and analyzes the collected digital signals, and scientifically judges the containment sealing test results through the industrial control computer. The containment sealing detection and verification system described in the present application adopts an integrated and portable design, and can be widely used in the containment sealing detection flow verification test of nuclear power plants.

[0038] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A containment sealing detection and verification system, characterized in that: include: An air circuit input connector (1), the input end of which is suitable for connecting to an air exhaust port provided on the containment vessel; An automatic regulating valve (2) connected to the output end of the gas path input connector (1); the automatic regulating valve (2) is suitable for regulating flow; A first mass flow meter (3) connected to the automatic regulating valve (2); the first mass flow meter (3) is suitable for detecting flow rate; A second mass flow meter (4) connected to the first mass flow meter (3); the second mass flow meter (4) is suitable for detecting flow rate; An air circuit output connector (5), the input end of which is connected to the second mass flow meter (4); the output end of the air circuit output connector (5) is suitable for being connected to a ventilation and filtering system; The host computer analysis subsystem is signal-connected to the automatic regulating valve (2), the first mass flow meter (3), and the second mass flow meter (4); the host computer analysis subsystem is suitable for controlling the automatic regulating valve (2) to open to a preset opening in real time and acquiring flow information data detected by the first mass flow meter (3) and the second mass flow meter (4) in real time, and storing and displaying the flow information data in real time.

2. The containment sealing detection and verification system according to claim 1, characterized in that: The containment sealing detection and verification system adjusts the air flow to be stable within a set time by means of an automatic regulating valve (2).

3. The containment sealing detection and verification system according to claim 1, characterized in that: The first mass flow meter (3) and the second mass flow meter (4) have the same specifications.

4. The containment sealing detection and verification system according to claim 3, characterized in that: The flow rate detection range of the first mass flow meter (3) and the second mass flow meter (4) is 0 L / min to 1000 L / min.

5. The containment sealing detection and verification system according to any one of claims 1 to 4, characterized in that: Also includes: The signal processing module (6) has an input interface connected to the automatic regulating valve (2), a signal interface of the first mass flow meter (3), and a signal interface of the second mass flow meter (4); and an output interface of the signal processing module (6) is connected to the upper computer analysis subsystem via a communication interface (7).

6. The containment sealing detection and verification system according to claim 5, characterized in that: Also includes: The power supply module (8) is connected to the power supply interface of the first mass flow meter (3), the power supply interface of the second mass flow meter (4), the power supply interface of the automatic regulating valve (2), and the power supply interface of the signal processing module (6) through a power switch (9).

7. The containment sealing detection and verification system according to any one of claims 1 to 4, characterized in that: The gas circuit input connector (1), the automatic regulating valve (2), the first mass flow meter (3), the second mass flow meter (4) and the gas circuit output connector (5) are all connected via a gas pipeline (10).

8. The containment sealing detection and verification system according to claim 7, characterized in that: The inner diameter of the gas pipeline (10) is 14 mm.

9. The containment sealing detection and verification system according to any one of claims 1 to 4, characterized in that: The host computer analysis subsystem is an industrial computer (11).

10. The containment sealing detection and verification system according to claim 5, characterized in that: The signal processing module (6) is suitable for collecting 4mA-20mA analog signals or converting digital signals into RS485 communication mode.

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