A blasting test system and method based on high-speed imaging technology

Abstract

The application provides a blasting test system and method based on high-speed imaging technology, comprising a blasting device, a pressure processing device, an image acquisition device and an image processing device; the pressure processing device is used for collecting a first pressure value in the blasting device; the image processing device is electrically connected with the pressure processing device; after the image processing device receives the first pressure value in the blasting device, the image acquisition device starts to collect the shape of the blasting fragment, the pressure processing device can measure the blasting pressure of the blasting fragment, the image processing device can observe the blasting process of the millisecond blasting fragment, and the real-time synchronous measurement mode is adopted between the pressure processing device and the image processing device, so that the real-time synchronization of data and images is ensured, and the performance reliability of the blasting fragment for the irradiation test device can be verified. The application can realize various specifications and models of the blasting fragment for the irradiation test device through the replaceable local parts, and has high economy.

Description

Technical Field

[0001] This application belongs to the field of research reactor irradiation technology, specifically relating to a blasting experimental system and method based on high-speed imaging technology. Background Technology

[0002] Rupture discs, as safety devices, release pressure within a pressure vessel by rupturing a diaphragm when the vessel is overpressurized, and are widely used in the pressure vessel industry. Irradiation testing equipment, serving as the carrier for irradiation testing of fuel elements within a reactor, consists of a flow channel, pressure tube, and insulating tube forming inner and outer flow channels and an insulating cavity from the inside out. The pressure tube serves as the pressure boundary between the inner and outer flow channels, with an operating pressure of approximately 16 MPa. The insulating cavity formed by the pressure tube and the insulating tube operates at approximately 1 MPa; it is a typical long rod-shaped pressure vessel. During normal operation, the irradiation testing equipment is installed in the reactor vents. To ensure reactor safety, special safety devices are required for the irradiation testing equipment. These safety devices include monitoring the integrity of the pressure tube and releasing pressure from the insulating tube under accident conditions. Monitoring the integrity of the pressure tube is primarily achieved through pressure monitoring within a closed loop formed by an external nitrogen circuit and the insulating cavity. When the pressure tube ruptures, the pressure inside the insulating tube rises rapidly. Overpressure venting of the insulation tubes is primarily achieved through an overpressure protection device on the insulation tubes. When the pressure tube ruptures, the high-pressure steam pressure is released through the protection device to prevent the insulation tube pressure from exceeding its limit and causing damage to the reactor. Rupture discs are used as the main structure of the overpressure protection device due to their simple structure, high reliability, and fast response time during the rupture process. Because of the extremely high safety requirements of the reactor, the rupture disc must meet both the overpressure venting pressure and the overpressure venting discharge rate. The rupture pressure of the overpressure venting device in the irradiation test facility is approximately 1.1 MPa, and the discharge rate requirement necessitates a rupture time on the order of 10¹ ms. Therefore, detailed observation of the rupture process is necessary to obtain accurate rupture time and pressure data to verify the reliability of the overpressure venting device.

[0003] Typically, rupture discs undergo burst tests on specific test benches before leaving the factory to obtain their burst pressure. Only a very small number of these test benches possess time monitoring capabilities. The cost of a single burst test bench is high, and it can only perform burst tests on a limited range of rupture disc sizes. Furthermore, irradiation testing facilities have significantly different testing objects and operating conditions, resulting in substantial variations in the burst pressure and discharge capacity of overpressure emission devices. Using test benches would further exacerbate the high testing costs. Therefore, there is a need to design an economical and reliable burst testing system and method capable of measuring millisecond-level burst times, applicable to various rupture disc sizes and models, to meet the reliability verification requirements of overpressure emission devices used in irradiation testing facilities. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this application is to provide a blasting test system and method based on high-speed imaging technology, which can not only measure the blasting pressure of the rupture disc, but also use high-speed imaging technology to obtain millisecond-level observations of the blasting process and verify the displacement requirements of the rupture disc. Furthermore, this test system and method can accommodate various specifications and models of rupture discs for irradiation testing devices by replacing some parts, thus exhibiting high economic efficiency.

[0005] To address the aforementioned issues, this application provides a blasting test system based on high-speed imaging technology, comprising: a blasting device, a pressure processing device, an image acquisition device, and an image processing device; the pressure processing device is used to acquire a first pressure value within the blasting device.

[0006] The image processing device is electrically connected to the pressure processing device. After receiving the first pressure value inside the blasting device, the image processing device controls the image acquisition device to start acquiring the morphology of the blasting fragments.

[0007] Furthermore, the blasting device includes: a pressure stabilizing chamber for buffering high-pressure gas entering the chamber, and the upper side wall of the pressure stabilizing chamber is provided with a pressure measuring port, and the lower side wall of the pressure stabilizing chamber is provided with an air inlet;

[0008] The pressure measuring port and the air inlet are axially opposite each other on the side wall of the pressure stabilizing chamber.

[0009] Furthermore, the blasting device further includes: a blasting chamber, which is located above the pressure stabilizing chamber and has an inner diameter smaller than that of the pressure stabilizing chamber;

[0010] The rupture chamber is provided with an upper flange and a lower flange, and a through hole is provided between the upper flange and the lower flange, and the diameter of the through hole is larger than the diameter of the rupture disc.

[0011] Furthermore, a first flange is provided at the top of the pressure stabilizing chamber;

[0012] The rupture chamber is connected to the pressure stabilizing chamber via the lower flange and the first flange.

[0013] Furthermore, the lower flange of the rupture chamber has the same outer diameter as the first flange.

[0014] Furthermore, the system also includes: a rupture disc clamping device for clamping rupture discs, the rupture disc clamping device including at least an upper clamping block and a lower clamping block;

[0015] The upper clamping block is provided with a tenon-face through hole in the middle;

[0016] The lower clamping block has a grooved through hole in the middle for placing a rupture disc;

[0017] The internal width of the groove surface is greater than or equal to the width of the rupture disc.

[0018] Furthermore, the system also includes: a gas source electrically connected to a local pressure gauge, and the rear end of the gas source is connected to a control valve.

[0019] Furthermore, the rupture disc clamping device also includes an upper clamp and a lower clamp;

[0020] The rupture disc clamping device is fixedly connected to the rupture chamber via the lower clamp and the upper flange.

[0021] Furthermore, the image acquisition device has a frame rate of a first set value; the image acquisition device is communicatively connected to the image processing device.

[0022] Furthermore, the pressure processing device includes a pressure sensor.

[0023] The pressure measuring port is connected to the pressure sensor.

[0024] Beneficial effects

[0025] The system provided in the embodiments of the present invention can not only measure the burst pressure of a rupture disc, but also obtain the burst time in milliseconds using high-speed imaging technology. Furthermore, this testing system and method can accommodate various specifications and models of rupture discs for irradiation testing devices by replacing some parts, thus exhibiting high economic efficiency. In addition, in practical use, the present invention demonstrates the following beneficial effects:

[0026] (1) The present invention designs a blasting test system based on high-speed imaging technology, including: a blasting device, a pressure processing device, an image acquisition device, and an image processing device; the pressure processing device can measure the blasting pressure of the blasting disc, and the image processing system can observe the millisecond-level blasting process of the blasting disc. The pressure system and the image measurement system adopt a real-time synchronous measurement method, which ensures the real-time synchronization of data and images, and can verify the performance reliability of the blasting disc used in the irradiation test device.

[0027] (2) In this invention, in order to meet the burst test requirements of rupture discs for irradiation testing devices with different burst pressures and different specifications (within 350mm), the size of the clamping block and the size of the burst chamber in the burst device are replaced, so as to achieve burst tests of rupture discs with a larger pressure range and size range at a smaller economic cost, which has certain economic value. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a blasting test system based on high-speed imaging technology;

[0029] Figure 2This is a schematic diagram of the blasting device structure, which is a schematic diagram of the principle of a blasting test system based on high-speed imaging technology according to an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of a rupture disc in a blasting test system based on high-speed imaging technology according to an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the morphological recording of the blasting process of the blasting test system based on high-speed imaging technology according to an embodiment of this application.

[0032] The attached reference numerals are as follows: 11. Tripod; 12. Image acquisition equipment; 13. Image processing device; 14. Blasting device; 15. Pressure processing device; 151. Pressure sensor; 16. Control valve; 17. Air source; 171. Local pressure gauge; 18. Network cable; 19. Rubber hose; 110. Communication cable; 2. Rupture disc clamping device; 21. Upper clamp; 22. Upper clamping block; 23. Lower clamping block; 24. Lower clamp; 25. Rupture disc; 3. Blasting chamber; 31. Upper flange; 32. Lower flange; 4. Pressure stabilizing chamber; 41. Pressure measuring port; 42. Air inlet; 43. Blasting chamber foundation; 44. First flange. Detailed Implementation

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0037] See also Figures 1 to 4 As shown in the embodiment of this application, a blasting test system based on high-speed imaging technology includes: a blasting device 14, a pressure processing device 15, an image acquisition device 12, and an image processing device 13; the pressure processing device 15 is used to acquire a first pressure value within the blasting device 14; the image processing device 13 is electrically connected to the pressure processing device 15, and after receiving the first pressure value within the blasting device 14, the image processing device 13 controls the image acquisition device 12 to begin acquiring the blasting pattern of the blasting disc 25; a gas source 17 is electrically connected to a local pressure gauge 171, and the rear end of the gas source 17 is connected to a control valve 16. Specifically, as shown in the attached... Figure 4 As shown, A represents the initial shape of the anti-arched rupture fragment at the start of the test; B represents the intermediate moment before deformation; C represents the shape of the anti-arched rupture fragment before deformation; D represents the shape of the anti-arched rupture fragment during the intermediate deformation phase; E represents the shape of the anti-arched rupture fragment before rupture; F represents the shape of the anti-arched rupture fragment at the initial rupture phase; G represents the shape of the anti-arched rupture fragment during the intermediate rupture phase; H represents the shape of the anti-arched rupture fragment at the moment of complete rupture; I represents the intermediate moment between complete rupture and the completion of the test; and J represents the shape of the anti-arched rupture fragment at the moment of test completion. This application uses a sequence of images captured by a high-speed camera to visually observe the rupture process of the rupture fragment, including its initiation, development, climax, and termination. The image processing device 13 can process and analyze the acquired images to generate clear images of the rupture process, facilitating the observation and analysis of the morphological changes of the rupture fragment.

[0038] In this embodiment, the gas source is a high-pressure gas cylinder with an initial pressure of 25 MPa. The gas cylinder outlet is equipped with a local pressure gauge 171 with a range of 0-25 MPa, which is used to measure the remaining gas in the gas cylinder. The pressure gauge is connected to the gas cylinder by a thread, and the rear end of the pressure gauge 171 is connected to the control valve 16 through a hose. The valve is initially in a full-pipe state, and both ends of the hose are threaded or fixed in other ways.

[0039] In one feasible embodiment, the blasting device 14 includes: a pressure stabilizing chamber 4, used to buffer the high-pressure gas entering the chamber to ensure stable gas pressure inside the chamber for easy measurement; the pressure stabilizing chamber 4 is a cylindrical cavity with a uniform height and inner diameter, specifically, the diameter of the pressure stabilizing chamber is 300mm, and the total volume is 4L; and the upper side wall of the pressure stabilizing chamber 4 is provided with a pressure measuring port 41, and the lower side wall of the pressure stabilizing chamber 4 is provided with an air inlet 42; the pressure measuring port 41 and the air inlet 42 are axially opposite each other on the side wall of the pressure stabilizing chamber 4.

[0040] The pressure processing device 15 includes a pressure sensor 151, and the pressure measuring port 41 is connected to the pressure sensor 151. Specifically, the diameter of the pressure measuring port 41 is DN10, and it is connected to the pressure sensor 151 via a thread, used to measure the air pressure in the pressure stabilizing chamber 4. In addition, the air inlet 42 is used to supply air into the pressure stabilizing chamber 4, and its diameter is set to DN20. The diameter of the air inlet 42 is larger than the diameter of the pressure measuring port 41, ensuring a sufficient inflation rate to control the burst time within 5 seconds, preventing excessive data recording during high-speed photography, and reducing the amount of image data processing.

[0041] In this embodiment, the blasting device 14 further includes: a blasting chamber 3, the diameter of which is 70 mm and the total volume is 0.3 L. The inner diameter of the blasting chamber 3 is smaller than that of the pressure stabilizing chamber 4. The blasting chamber 3 is located above the pressure stabilizing chamber 4 and has an upper flange 31 and a lower flange 32. A through hole is provided between the upper flange 31 and the lower flange 32, and the diameter of the through hole is larger than that of the rupture disc 25. Preferably, the inner diameter of the upper flange 31 is about 10 mm. The high-pressure gas cross-section at this location reduces the gas kinetic energy and increases the pressure response. The outer diameter of the upper flange 31 is 550 mm, and eight bolt holes are evenly distributed near the inner side of the outer edge for connecting the rupture disc and the rupture disc holder 25. The inner and outer diameters, bolt hole sizes, and positions of the lower flange 32 are consistent with those of the pressure stabilizing chamber flange 2.8.

[0042] In this embodiment, a first flange 44 is provided at the top of the pressure stabilizing chamber 4; the rupture chamber 3 is connected to the pressure stabilizing chamber 4 through a lower flange 32 and the first flange 44.

[0043] Preferably, the lower flange 32 of the blasting chamber 3 has the same outer diameter as the first flange 44.

[0044] In this embodiment, a square blasting chamber foundation 43 is fixedly connected to the bottom of the pressure stabilizing chamber 4. The foundation has a side length of 800 mm, is made of stainless steel, and has a thickness of 30 mm. It is used to support the blasting device 14.

[0045] In this embodiment, the system further includes a rupture disc clamping device 2 for clamping a rupture disc 25. The rupture disc clamping device 2 includes at least an upper clamping block 22 and a lower clamping block 23. Specifically, the upper clamping block 22 and the lower clamping block 23 have square cross sections, and the upper clamping block 22 has a tenon-face through hole in the middle, and the lower clamping block 23 has a groove through hole in the middle for placing the rupture disc. The internal width of the groove is greater than or equal to the width of the rupture disc 25. The contact surfaces of the upper clamping block 22 and the lower clamping block 23 are tenon groove structures. The upper clamping block 2.2 is the tenon surface, and the lower clamping block 2.3 is the groove surface. The groove width ratio of the upper clamping block 22 and the lower clamping block 23 is 1-3 mm greater than the edge width of the rupture disc. The rupture disc 25 is placed in the groove. The tenon groove is used for positioning the rupture disc and the tenon groove and the rupture disc 25 are pressed tightly together by the contact surfaces of the clamping blocks. The upper clamping block 22 and the lower clamping block 23 of the rupture disc clamping device are both made of square transparent acrylic glass with a side length of 380 mm and a thickness of 25 mm, which facilitates observation of the shape of the rupture disc 25 during the rupture process.

[0046] Specifically, the rupture disc clamping device 2 further includes an upper clamp 21 and a lower clamp 24. The upper clamp 21 and the lower clamp 24 are circular plate flanges. In addition, the center of the upper clamp 21 and the lower clamp 24 is a through hole. The lower surface of the flange of the upper clamp 21 is in contact with the upper surface of the upper clamping block 22, and the upper surface of the flange of the lower clamp 24 is in contact with the lower surface of the lower clamping block 23. The diameter of the hole is larger than the diameter of the rupture disc 25 and slightly smaller than the cross-sectional side length of the upper clamping block 22 and the lower clamping block 23. The upper clamp 21 and the lower clamp 24 fix the clamping blocks while preventing obstruction of the discharge channel. The outer diameter of the flange of the lower clamp 24 is the same as that of the upper flange 31 of the rupture chamber. The rupture disc clamping device 2 and the rupture chamber 3 are fixedly connected through the lower clamp 24 and the upper flange 31.

[0047] In addition, the upper clamp 21 flange has eight bolt holes evenly distributed along its outer diameter edge, and the lower clamp 24 flange has eight through holes evenly distributed along its outer diameter edge. The positions and dimensions of the bolt holes on the upper and lower clamp flanges are consistent with those on the circular flange of the rupture chamber. The upper clamp 21, the lower clamp 24, and the upper flange 31 of the rupture chamber are bolted together to secure the rupture disc holder to the rupture disc 25. Specifically, the upper clamp 21 and the lower clamp 24 flanges are both made of stainless steel with an inner diameter of 50 mm, an outer diameter of 550 mm, and a thickness of 15 mm.

[0048] The image acquisition device 12 has a first set frame rate; the image acquisition device 12 is communicatively connected to the image processing device 13.

[0049] In this embodiment, the system further includes: a tripod 11; the image acquisition device 12 is fixed on the tripod 11 and placed at a certain distance from the blasting device 14, and connected to the image processing device 13 via a network cable 18, and the pressure signal reception is set as the trigger signal for the image acquisition device 12; specifically, the image acquisition device is a high-speed camera, the high-speed camera has a shooting frame rate of not less than 10,000 fps, and the high-speed camera has not less than 5 million pixels at a frame rate of 10,000 fps; the image processing device 13 can be a PC.

[0050] Example 2

[0051] A method for blasting tests based on high-speed imaging technology, the method comprising: S1, installing a rupture disc in a rupture disc clamping device and ensuring its stable position.

[0052] S2. Connect the blasting device, pressure handling device, image acquisition device, and image processing device according to the test requirements, and confirm that all equipment is in normal working condition.

[0053] S3. Set the initial pressure value through the air source and control system, and turn on the pressure sensor for real-time monitoring.

[0054] When the pressure inside the blasting device reaches the preset first pressure value, the pressure processing device sends a signal to the image processing device.

[0055] S4. Upon receiving the pressure signal, the image processing device immediately triggers the image acquisition equipment to begin operation. The high-speed camera begins capturing the blasting process of the rupture disc at a set frame rate until the blasting is complete.

[0056] The image processing device receives image data captured by a high-speed camera and processes it to generate a clear sequence of images of the blasting process. By observing and analyzing these images, the blasting performance of the blasting fragments can be evaluated, including blasting time and blasting pattern.

[0057] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0058] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A blasting test system based on high-speed imaging technology, characterized in that, include: Explosive device (14), pressure handling device (15), image acquisition device (12), image processing device (13); The pressure processing device (15) is used to collect the first pressure value inside the blasting device (14); The image processing device (13) is electrically connected to the pressure processing device (15). After receiving the first pressure value in the blasting device (14), the image processing device (13) controls the image acquisition device (12) to start acquiring the blasting pattern of the blasting disc (25). The blasting device (14) includes: a pressure stabilizing chamber (4) for buffering high-pressure gas entering the chamber, and the upper side wall of the pressure stabilizing chamber (4) is provided with a pressure measuring port (41) and the lower side wall of the pressure stabilizing chamber (4) is provided with an air inlet (42). The pressure measuring port (41) and the air inlet (42) are axially opposite each other on the side wall of the pressure stabilizing chamber (4); The blasting device (14) further includes: a blasting chamber (3), which is located above the pressure stabilizing chamber (4) and the inner diameter of the blasting chamber (3) is smaller than that of the pressure stabilizing chamber (4). The blasting chamber (3) is provided with an upper flange (31) and a lower flange (32), and a through hole is provided between the upper flange (31) and the lower flange (32), and the diameter of the through hole is larger than the diameter of the blasting disc (25).

2. The blasting test system based on high-speed imaging technology according to claim 1, characterized in that, The top of the pressure stabilizing chamber (4) is provided with a first flange (44). The rupture chamber (3) is connected to the pressure stabilizing chamber (4) via the lower flange (32) and the first flange (44).

3. The blasting test system based on high-speed imaging technology according to claim 2, characterized in that, The lower flange (32) of the blasting chamber (3) has the same outer diameter as the first flange (44).

4. The blasting test system based on high-speed imaging technology according to claim 3, characterized in that, The system further includes: a rupture disc clamping device (2) for clamping a rupture disc (25), the rupture disc clamping device (2) including at least an upper clamping block (22) and a lower clamping block (23); The upper clamping block (22) is provided with a fork-face through hole in the middle; The lower clamping block (23) has a groove through hole in the middle for placing the rupture disc; The internal width of the groove surface is greater than or equal to the width of the rupture disc (25).

5. The blasting test system based on high-speed imaging technology according to claim 1, characterized in that, The system also includes a gas source (17) connected to a local pressure gauge (171), and the rear end of the gas source (17) is connected to a control valve (16).

6. The blasting test system based on high-speed imaging technology according to claim 4, characterized in that, The rupture disc clamping device (2) also includes an upper clamp (21) and a lower clamp (24); The rupture disc clamping device (2) and the rupture chamber (3) are fixedly connected by the lower clamp (24) and the upper flange (31).

7. The blasting test system based on high-speed imaging technology according to claim 1, characterized in that, The image acquisition device (12) has a first set frame rate; the image acquisition device (12) is communicatively connected to the image processing device (13).

8. The blasting test system based on high-speed imaging technology according to claim 1, characterized in that, The pressure processing device (15) includes a pressure sensor (151), and the pressure measuring port (41) is connected to the pressure sensor (151).

Images