Nuclear power station optical fiber detector flange leakage simulation test device

Abstract

The invention discloses a nuclear power station optical fiber detector flange leakage simulation test device which comprises a pipeline used for containing a medium source, the tail end of the pipeline is located at a simulation leakage point of a simulation flange, and a to-be-tested optical fiber detector is arranged at the simulation leakage point; the medium source is stored in the heating container, and a thermometer is arranged on the heating container; the simulation flange comprises a horizontally arranged lower flange, and the top of the lower flange is provided with an upper flange. A water inlet of the pipeline is communicated with a water outlet of the heating container, and a water outlet of the pipeline is positioned between the upper flange and the lower flange; the to-be-detected optical fiber detector is arranged on the outer circumference of the simulation flange and is opposite to the pipeline water outlet; a flow meter and a manual stop valve are arranged on the pipeline; the optical fiber detector with high adaptability and high detection precision is obtained by simulating a flange leakage scene, and safety accidents caused by flange leakage are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power plant safety detection, and in particular relates to a nuclear power plant optical fiber detector flange leakage simulation test device. Background Art

[0002] Fiber optic detectors are often used to detect pipeline leaks due to their high sensitivity and resistance to electromagnetic interference. In nuclear power plants, flange connection is a common connection method in pipeline systems. Flange leakage may cause serious safety hazards. Therefore, there are high performance requirements for fiber optic detectors for detecting leaks. At present, there is no equipment on the market for performance testing of fiber optic detectors for detecting flange leaks, and the accuracy of the test results cannot be guaranteed, resulting in problems such as insufficient adaptability and low accuracy of the test. Summary of the invention

[0003] The purpose of the present invention is to provide a nuclear power plant optical fiber detector flange leakage simulation test device to ensure the accuracy of the detection result and improve the adaptability and accuracy of the detection.

[0004] The present invention adopts the following technical solutions:

[0005] A nuclear power plant optical fiber detector flange leakage simulation test device, comprising a pipeline for accommodating a medium source, the end of the pipeline is located at a simulated leakage point of a simulated flange, and an optical fiber detector to be tested is arranged at the simulated leakage point;

[0006] The medium source is stored in a heating container, and a thermometer is arranged on the heating container;

[0007] The simulated flange includes a lower flange placed horizontally, and an upper flange is arranged on the top of the lower flange;

[0008] The water inlet of the pipeline is connected to the water outlet of the heating container, and the water outlet of the pipeline is located between the upper flange and the lower flange;

[0009] The optical fiber detector to be tested is arranged on the outer circumference of the simulated flange, opposite to the water outlet of the pipeline;

[0010] The pipeline is equipped with a flow meter and a manual stop valve.

[0011] Furthermore, the pipeline includes a main connecting pipeline, the water inlet of the main connecting pipeline is connected to the water outlet of the heating container, the water outlet of the main connecting pipeline is connected to the water inlet of the branch pipeline through a branch module, and the branch pipeline is located between the upper flange and the lower flange.

[0012] Furthermore, a main pipeline access hole is provided at the top center of the branch module, and a branch pipeline access hole is provided at the side of the branch module;

[0013] The main pipeline access hole is coaxially arranged with the simulation flange;

[0014] A support is provided at the bottom of the branch module, and the support is used to support the branch module so that the branch pipeline access hole is located between the upper flange and the lower flange.

[0015] Furthermore, the water outlet of the branch pipeline is arranged on the outer circumference of the simulated flange.

[0016] Further, the upper flange and the lower flange are connected by bolts, the upper flange and the lower flange both have internal threads, and the bolts have internal threads;

[0017] A gap is provided between the upper flange and the lower flange, and the branch pipeline is located in the gap.

[0018] Further, the optical fiber detector to be tested is arranged on the outer circumference of the simulated flange through a mounting assembly;

[0019] The mounting assembly comprises a detector mounting seat, which is mounted on the outer circumference of the simulated flange through a first clamp and a second clamp, and the optical fiber detector to be tested is arranged on the detector mounting seat;

[0020] The first clamp is arranged on the outer circumference of the upper flange, and the second clamp is arranged on the outer circumference of the lower flange.

[0021] Furthermore, a bracket is provided at the bottom of the simulated flange, and the upper surface of the bracket is a plane.

[0022] Furthermore, a water collecting tray is provided at the bottom of the bracket, and the area of ​​the water collecting tray is larger than the area of ​​the bracket.

[0023] Furthermore, the water outlet of the main connecting pipeline is welded to the main pipeline access hole, and the water outlet of the branch pipeline is welded to the branch pipeline access hole.

[0024] Furthermore, a sealing gasket is arranged between the upper flange and the lower flange, and a gap is arranged between the sealing gasket and the upper flange or between the sealing gasket and the lower flange.

[0025] The beneficial effects of the present invention are as follows: the present invention transports the medium source to the simulated leakage point of the simulated flange through a pipeline, and sets a thermometer and a flowmeter, and simulates flange leakage scenarios at different temperatures and different flow rates by controlling the temperature and flow rate of the medium source, so as to detect the performance of the optical fiber detector to be tested; by changing the temperature and flow rate of the medium source, optical fiber detectors with high sensitivity to leakages at different temperatures and different flow rates are screened out, thereby enhancing the adaptability of the detection results, improving the detection accuracy, and reducing safety accidents caused by flange leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the present invention;

[0027] Figure 2 A top view of the present invention;

[0028] Figure 3 is a cross-sectional view of a simulated flange in the present invention;

[0029] Figure 4 is a cross-sectional view of a branch module in the present invention;

[0030] Figure 5 It is a front view of the installation assembly in the present invention;

[0031] Figure 6 is a side view of the installation assembly of the present invention;

[0032] Figure 7 is a side view of the flow meter of the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the first clamp and the second clamp in the present invention;

[0034] Among them, 1. Heating container, 2. Simulation flange, 2-1. Upper flange, 2-2. Lower flange, 2-3. Sealing gasket, 2-4. Bolts, 3. Simulated leakage point, 4. Optical fiber detector to be tested, 5. Thermometer, 6. Flow meter, 7. Manual stop valve, 8. Pipeline, 8-1. Main connecting pipeline, 8-2. Branch pipeline, 8-3. Branch module, 8-31. Main pipeline access hole, 8-32. Branch pipeline access hole, 9. Bracket, 10. Water collecting tray, 11. Support, 12. Installation assembly, 12-1. Detector mounting seat, 12-2. First clamp, 12-3. Second clamp, 13. Flow meter bracket. DETAILED DESCRIPTION

[0035] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] A nuclear power plant optical fiber detector flange leakage simulation test device, such as Figure 1 As shown, it includes a pipe 8 for containing a medium source, the end of the pipe 8 is located at a simulated leakage point 3 of a simulated flange 2, and a fiber optic detector 4 to be tested is arranged at the simulated leakage point 3;

[0037] The medium source is stored in a heating container 1, and a thermometer 5 is provided on the heating container 1;

[0038] The simulated flange 2 includes a horizontally placed lower flange 2-2, and an upper flange 2-1 is arranged on the top of the lower flange 2-2;

[0039] The water inlet of the pipe 8 is connected to the water outlet of the heating container 1, and the water outlet of the pipe 8 is located between the upper flange 2-1 and the lower flange 2-2;

[0040] The optical fiber detector 4 to be tested is arranged on the outer circumference of the simulated flange 2, opposite to the water outlet of the pipeline;

[0041] A flow meter 6 and a manual stop valve 7 are provided on the pipeline 2;

[0042] A flow meter bracket 13 is provided on one side of the flow meter 6 for supporting the flow meter 6 .

[0043] The medium source is water.

[0044] The heating container 1 may be an electric heating barrel, which is used to simulate a high temperature and high pressure environment. The electric heating barrel is filled with water, which is heated to a set temperature by the electric heating barrel.

[0045] Simulated flange 2 is used to simulate the actual flange connection, and flange DN300 is selected as simulated flange 2.

[0046] The thermometer 5 is a metal thermometer installed on the top of the electric heating barrel to monitor the temperature of the liquid in the electric heating barrel and simulate leakage scenarios at different temperatures to detect the sensitivity of the optical fiber detector 4 to leakages at different temperatures.

[0047] The flow meter 6 is set on the pipe 8 between the electric heating barrel and the simulation flange 2 to measure the liquid flow rate flowing out of the electric heating barrel, and the flow rate range is set to 25-250mL / min. The liquid flow rate is accurately controlled by the manual stop valve 7 and the flow meter 6 to simulate different leakage conditions.

[0048] The present invention transports the medium source to the simulated leakage point of the simulated flange 2 through a pipeline 8, and sets a thermometer 5 and a flowmeter 6. By controlling the temperature and flow of the medium source, flange leakage scenarios under different temperatures and different flow rates are simulated to detect the performance of the optical fiber detector 4 to be tested; by changing the temperature and flow of the medium source, optical fiber detectors with high sensitivity to leakages at different temperatures and different flow rates are screened out, thereby enhancing the adaptability of the detection results, improving the detection accuracy, and reducing safety accidents caused by flange leakage.

[0049] like Figure 2 As shown, the pipeline 8 includes a main connecting pipeline 8-1, the water inlet of the main connecting pipeline 8-1 is connected to the water outlet of the heating container 1, the water outlet of the main connecting pipeline 8-1 is connected to the water inlet of the branch pipeline 8-2 through the branch module 8-3, and the branch pipeline 8-2 is located between the upper flange 2-1 and the lower flange 2-2.

[0050] The liquid in the main connecting pipeline 8-1 is diverted through the branch pipeline 8-2 and delivered to each simulated leakage point 3, so as to achieve the purpose of detecting multiple optical fiber detectors at the same time, thereby improving the test efficiency.

[0051] like Figure 4 As shown, a main pipeline access hole 8-31 is opened at the top center of the branch module 8-3, and a branch pipeline access hole 8-32 is opened on the side of the branch module 8-3;

[0052] The main pipeline access hole 8-31 is coaxially arranged with the simulation flange 2;

[0053] A support 11 is provided at the bottom of the branch module 8-3, and the support 11 is used to support the branch module 8-3 so that the branch pipeline access hole 8-32 is located between the upper flange 2-1 and the lower flange 2-2.

[0054] The support 11 is arranged at the bottom of the lower flange 2-2, and its length is equal to the diameter of the outer circumference of the simulation flange 2. Bolt holes are arranged at both ends of the support 11, and the support 11 is fixed to the bottom of the simulation flange 2 by bolts 2-4.

[0055] The main pipeline access hole 8-31 is set to be concentric with the simulated flange 2, and the branch pipeline access hole 8-32 is set to be on the same horizontal plane with the contact surfaces of the upper flange 2-1 and the lower flange 2-2. This can make the liquid in each branch pipeline 8-2 reach the simulated leakage point 3 at the same time, keep the flow rate of the liquid in each branch pipeline 8-2 consistent, and reduce the impact of the test device on the test results.

[0056] like Figure 3 As shown, the water outlet of the branch pipeline 8 - 2 is arranged on the outer circumference of the simulated flange 2 .

[0057] The outlet of the branch pipe 8-2 is the simulated leakage point 3 on the outer circumference of the simulated flange 2. By setting the branch pipe 8-2 with a radius equal to the outer circumference of the simulated flange 2, the liquid can be accurately transported to the simulated leakage point 3, simulating a real leakage scenario and ensuring the accuracy of the test.

[0058] The upper flange 2-1 and the lower flange 2-2 are connected by bolts 2-4, the upper flange 2-1 and the lower flange 2-2 both have internal threads, and the bolts 2-4 have internal threads;

[0059] There is a gap between the upper flange 2-1 and the lower flange 2-2, and the branch pipeline 8-2 is located in the gap.

[0060] By loosening the bolts 2-4, a gap is formed between the upper flange 2-1 and the lower flange 2-2, which not only simulates the situation in which the upper flange and the lower flange are not sealed due to loose bolts or damaged gaskets in real situations, but also makes it easy to operate.

[0061] like Figure 5 and Figure 6 As shown, the optical fiber detector 4 to be tested is arranged on the outer circumference of the simulated flange 2 through the mounting assembly 12;

[0062] The mounting assembly 12 includes a detector mounting seat 12-1, which is mounted on the outer circumference of the simulation flange 2 through a first clamp 12-2 and a second clamp 12-3, and the optical fiber detector 4 to be tested is arranged on the detector mounting seat 12-1;

[0063] like Figure 8 As shown, the first clamp 12-2 is arranged on the outer circumference of the upper flange 2-1, and the second clamp 12-3 is arranged on the outer circumference of the lower flange 2-2.

[0064] The optical fiber detector 4 to be tested is installed on the simulation flange 2 using the installation assembly 12 to ensure that the optical fiber detector 4 to be tested is stable and not loose under different working environments, and at the same time, it is easy to install, disassemble and replace the optical fiber detector 4 to be tested without damaging the simulation flange 2.

[0065] like Figure 1 As shown, a bracket 9 is provided at the bottom of the simulated flange 2, and the upper surface of the bracket 9 is a plane.

[0066] The bracket 9 is used to support the entire test device, so that the simulated flange remains horizontal and ensures stable operation of the test.

[0067] A water collecting tray 10 is provided at the bottom of the bracket 9 , and the area of ​​the water collecting tray 10 is larger than the area of ​​the bracket 9 .

[0068] The water collecting tray 10 is used to collect the accumulated liquid flowing out of the simulated leakage point. The water collecting tray 10 is used in conjunction with the bracket 9 to allow the liquid flowing out of the simulated leakage point 3 to flow into the water collecting tray 10 to form accumulated liquid, so that the optical fiber detector 4 to be tested is not disturbed by the accumulated liquid.

[0069] The water outlet of the main connecting pipeline 8-1 is welded to the main pipeline access hole 8-31, and the water outlet of the branch pipeline 8-2 is welded to the branch pipeline access hole 8-32.

[0070] The pipeline and the branch module 8-3 are sealed by welding to prevent liquid leakage during the test.

[0071] A sealing gasket 2-3 is also arranged between the upper flange 2-1 and the lower flange 2-2, and a gap is arranged between the sealing gasket 2-3 and the upper flange 2-1 or between the sealing gasket 2-3 and the lower flange 2-2, which is used to simulate the real leakage scenario of flange gap or sealing gasket damage, so that the test results are closer to the real detection results.

[0072] The working principle of the present invention is: the liquid medium in the electric heating barrel is heated to a set temperature to simulate a high temperature and high pressure environment. The manual stop valve 7 is opened, and the flow meter 6 is adjusted to the required flow rate, so that the liquid medium flows from the electric heating barrel into the simulated flange DN300 through the main connecting pipeline 8-1 and the branch pipeline 8-2 in sequence, and flows out from the simulated leakage point of the simulated flange DN300. The leakage is detected by the optical fiber detector 4 to be tested, and its detection ability and accuracy for different leakage conditions are evaluated according to the feedback signal of the optical fiber detector 4 to be tested.

Claims

1. A nuclear power plant optical fiber detector flange leakage simulation test device, characterized in that: It comprises a pipeline (8) for containing a medium source, the end of the pipeline (8) is located at a simulated leakage point (3) of a simulated flange (2), and a fiber optic detector (4) to be tested is arranged at the simulated leakage point (3); The medium source is stored in a heating container (1), and a thermometer (5) is provided on the heating container (1); The simulated flange (2) comprises a horizontally placed lower flange (2-2), and an upper flange (2-1) is arranged on the top of the lower flange (2-2); The water inlet of the pipeline (8) is connected to the water outlet of the heating container (1), and the water outlet of the pipeline (8) is located between the upper flange (2-1) and the lower flange (2-2); The optical fiber detector (4) to be tested is arranged on the outer circumference of the simulation flange (2) and is opposite to the water outlet of the pipeline; The pipeline (2) is provided with a flow meter (6) and a manual stop valve (7).

2. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 1, characterized in that: The pipeline (8) comprises a main connecting pipeline (8-1), the water inlet of the main connecting pipeline (8-1) is connected to the water outlet of the heating container (1), the water outlet of the main connecting pipeline (8-1) is connected to the water inlet of a branch pipeline (8-2) through a branch module (8-3), and the branch pipeline (8-2) is located between the upper flange (2-1) and the lower flange (2-2).

3. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 2, characterized in that: A main pipeline access hole (8-31) is provided at the center of the top of the branch module (8-3), and a branch pipeline access hole (8-32) is provided on the side of the branch module (8-3); The main pipe access hole (8-31) is coaxially arranged with the simulation flange (2); A support (11) is provided at the bottom of the branch module (8-3), and the support (11) is used to support the branch module (8-3) so that the branch pipeline access hole (8-32) is located between the upper flange (2-1) and the lower flange (2-2).

4. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 2 or 3, characterized in that: The water outlet of the branch pipeline (8-2) is arranged on the outer circumference of the simulation flange (2).

5. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 4, characterized in that: The upper flange (2-1) and the lower flange (2-2) are connected by bolts (2-4); both the upper flange (2-1) and the lower flange (2-2) have internal threads, and the bolts (2-4) have internal threads; There is a gap between the upper flange (2-1) and the lower flange (2-2), and the branch pipeline (8-2) is located in the gap.

6. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 1 or 5, characterized in that: The optical fiber detector (4) to be tested is arranged on the outer circumference of the simulation flange (2) through a mounting assembly (12); The mounting assembly (12) comprises a detector mounting seat (12-1), the detector mounting seat (12-1) being mounted on the outer circumference of the simulation flange (2) via a first clamp (12-2) and a second clamp (12-3), and the optical fiber detector (4) to be tested is arranged on the detector mounting seat (12-1); The first clamp (12-2) is arranged on the outer circumference of the upper flange (2-1), and the second clamp (12-3) is arranged on the outer circumference of the lower flange (2-2).

7. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 6, characterized in that: A bracket (9) is provided at the bottom of the simulation flange (2), and the upper surface of the bracket (9) is a plane.

8. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 7, characterized in that: A water collecting tray (10) is provided at the bottom of the bracket (9), and the area of ​​the water collecting tray (10) is larger than the area of ​​the bracket (9).

9. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 8, characterized in that: The water outlet of the main connecting pipeline (8-1) is welded to the main pipeline access hole (8-31), and the water outlet of the branch pipeline (8-2) is welded to the branch pipeline access hole (8-32).

10. A nuclear power plant optical fiber detector flange leakage simulation test device according to claim 9, characterized in that: A sealing gasket (2-3) is also provided between the upper flange (2-1) and the lower flange (2-2), and the gap is provided between the sealing gasket (2-3) and the upper flange (2-1) or between the sealing gasket (2-3) and the lower flange (2-2).

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