Bursting test system and method based on high-speed imaging technology

Abstract

The invention provides a bursting test system and method based on a high-speed imaging technology. The bursting test system comprises a bursting device, a pressure processing device, image acquisition equipment and an image processing device, the pressure processing device is used for collecting a first pressure value in the blasting device; and the image processing device is electrically connected with the pressure processing device, and the image processing device controls the image acquisition equipment to start to acquire the blasting form of the blasting disc after receiving the first pressure value in the blasting device. The explosion process of the millisecond-level rupture disk can be observed through the image processing device, and the image processing device and the pressure processing device adopt a real-time synchronous measurement mode, so that the real-time synchronism of data and images is ensured, and the performance reliability of the rupture disk for the irradiation test device can be verified. By means of the mode that local parts can be replaced, the rupture disks of various specifications and models can be used for the irradiation test device, and high economical efficiency is achieved.

Description

Technical Field

[0001] The present application belongs to the field of research reactor irradiation technology, and specifically relates to a blasting experiment system and method based on high-speed imaging technology. Background Art

[0002] As a safety device, bursting discs release the pressure in the container by breaking the diaphragm when the container is over-pressured. They are widely used in the pressure vessel industry. As a carrier for irradiation testing of fuel elements in the reactor, the irradiation test device is composed of a shunt pipe, a pressure pipe and an insulation pipe from the inside to the outside to form an inner and outer flow channel and an insulation cavity; the inner and outer flow channels use the pressure pipe as the pressure boundary, and the working pressure is about 16MPa; the insulation cavity formed by the pressure pipe and the insulation pipe has a working pressure of about 1MPa; it is a typical long rod-shaped pressure vessel. During normal operation, the irradiation test device is loaded in the reactor channel. In order to ensure the safety of the reactor, special safety devices need to be set for the irradiation test device. The functions of the safety device include integrity monitoring of the pressure pipe and overpressure discharge of the insulation pipe under accident conditions. The integrity monitoring of the pressure pipe is mainly achieved by pressure monitoring in a closed loop formed by an external nitrogen loop and the insulation cavity. When the pressure pipe ruptures, the pressure in the insulation pipe rises rapidly. The overpressure discharge of the insulation pipe is mainly achieved through the overpressure protection device on the insulation pipe of the device. When the pressure pipe ruptures, the high-pressure steam pressure is discharged through the protection device to prevent the insulation pipe pressure from exceeding the pressure limit, causing the insulation pipe to rupture and damage the reactor body. The bursting disc is used as the main structure of the overpressure protection device due to its simple structure, high reliability and fast response time during the blasting process. Since the reactor has extremely high safety requirements, the bursting disc must not only meet the discharge pressure requirements of the overpressure discharge, but also meet the overpressure discharge displacement requirements. The bursting pressure of the overpressure discharge device of the irradiation test device is about 1.1MPa, and the displacement requirement requires the bursting time of the bursting disc to be about 101ms. Therefore, it is necessary to observe the blasting process of the bursting disc in detail to obtain detailed bursting time and pressure of the bursting disc to verify the reliability of the overpressure discharge device.

[0003] Usually, before a bursting disc leaves the factory, it will be subjected to a bursting test on a specific test bench to obtain the bursting pressure of the bursting disc. Only a few test benches have a time monitoring function. The cost of a single bursting test bench is high and it can only perform bursting tests on bursting discs within a certain range of specifications and sizes. However, due to the large differences in the test objects and working conditions of the irradiation test device, the bursting pressure and displacement of the overpressure discharge device are also quite different. The use of a test bench will result in expensive testing costs. Therefore, it is necessary to design a bursting test system and method that can measure millisecond-level bursting time, is applicable to bursting discs of various specifications and models, and is economical and reliable, so as to meet the reliability verification requirements of overpressure discharge devices for irradiation test devices. 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 blasting disc, but also use the high-speed imaging technology to obtain millisecond-level observations of the blasting process to verify the displacement requirements of the blasting disc. In addition, the test system and method can realize blasting discs of various specifications and models for irradiation test devices by replacing local parts, which has high economic efficiency.

[0005] In order to solve the above problems, the present application provides 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 is used to collect a first pressure value in the blasting device;

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

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

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

[0009] Furthermore, the blasting device further comprises: a blasting chamber, the blasting chamber being arranged at the upper part of the pressure stabilizing chamber and the inner diameter of the blasting chamber being smaller than that of the pressure stabilizing chamber;

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

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

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

[0013] Furthermore, the outer diameter of the lower flange of the blasting chamber is consistent with that of the first flange.

[0014] Furthermore, the system further comprises: a bursting disc clamping device for clamping the bursting disc, the bursting disc clamping device comprising at least an upper clamping block and a lower clamping block;

[0015] A falcon-faced through hole is arranged in the middle of the upper clamping block;

[0016] A through hole is provided in the middle of the lower clamping block for placing a bursting disc;

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

[0018] Furthermore, the system also includes: an air source, which is electrically connected to an on-site pressure gauge, and a rear end of the air source is connected to a control valve.

[0019] Furthermore, the bursting disc clamping device further comprises an upper clamp and a lower clamp;

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

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

[0022] Furthermore, the pressure treatment 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 embodiment of the present invention can not only measure the bursting pressure of the bursting disc, but also use high-speed imaging technology to obtain the bursting time of the millisecond level. In addition, the test system and method can realize bursting discs of various specifications and models for the irradiation test device by replacing local parts, which has high economic efficiency; in addition, in actual use, the present invention embodies 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 present application can measure the blasting pressure of the blasting piece through the pressure processing device, and can observe the millisecond-level blasting process of the blasting piece through the image processing system. 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 piece used in the irradiation test device.

[0027] (2) In the present invention, in order to meet the blasting test requirements of blasting discs for irradiation test devices with different blasting pressures and different specifications (within 350 mm), the size of the clamping block and the size of the blasting chamber in the blasting device are replaced, so that the blasting test of blasting discs with a larger pressure range and size range can be achieved at a relatively low economic cost, which has certain economic value. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0030] Figure 3 A schematic diagram of a blasting piece of a blasting test system based on high-speed imaging technology according to an embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of the morphology recording during the blasting process of the blasting piece of the blasting test system based on the high-speed imaging technology in an embodiment of the present application.

[0032] The accompanying drawings are denoted by the following numerals: 11, tripod; 12, image acquisition device; 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, bursting disc clamping device; 21, upper clamp; 22, upper clamp block; 23, lower clamp block; 24, lower clamp; 25, bursting 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 DESCRIPTION

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] See also Figures 1 to 4 As shown, according to an embodiment of the present 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 collect the first pressure value in the blasting device 14; the image processing device 13 is electrically connected to the pressure processing device 15, and after the image processing device 13 receives the first pressure value in the blasting device 14, it controls the image acquisition device 12 to start collecting the blasting shape of the blasting piece 25; the gas source 17 is electrically connected to the local pressure gauge 171, and the rear end of the gas source 17 is connected to the control valve 16. Specifically, as shown in the attached Figure 4 As shown, A is the shape of the reverse arched bursting piece at the initial moment of the test, B is the middle moment of deformation, C is the shape of the reverse arched bursting piece at the moment of deformation; D is the shape of the reverse arched bursting piece at the middle moment of deformation; E is the shape of the reverse arched bursting piece at the moment of rupture; F is the shape of the reverse arched bursting piece at the initial moment of rupture in the test; G is the shape of the reverse arched bursting piece at the middle moment of rupture in the test; H is the shape of the reverse arched bursting piece at the moment of complete rupture in the test; I is the middle moment from the complete rupture of the reverse arched bursting piece to the completion of the test; J is the shape of the reverse arched bursting piece at the moment of completion of the test. The present application uses a sequence of images taken by a high-speed camera to intuitively observe the blasting process of the blasting piece, including its start, development, climax and end. The image processing device 13 can process and analyze the collected images to generate clear images of the blasting process, which is convenient for observing and analyzing the morphological changes of the blasting piece.

[0038] In this embodiment, the gas source is a high-pressure gas cylinder with an initial pressure of 25 MPa. The outlet of the gas cylinder is provided with an on-site pressure gauge 171 with a measuring range of 0-25 MPa for measuring the remaining gas in the gas cylinder. The pressure gauge is connected to the gas cylinder by threads, and the rear end of the pressure gauge 171 is connected to the control valve 16 by a hose. The valve is initially in a full-pipe state, and both ends of the hose are threaded or fixedly connected by other means.

[0039] In a feasible embodiment, the blasting device 14 includes: a pressure-stabilizing chamber 4, which is used to buffer the high-pressure gas entering the chamber to ensure that the air pressure in the chamber is stable for easy measurement; the pressure-stabilizing chamber 4 is set to a cylindrical cavity with a consistent height and inner diameter. Specifically, the diameter of the pressure-stabilizing chamber is set to 300 mm, and the total volume is 4L; and a pressure measuring port 41 is provided on the upper side wall of the pressure-stabilizing chamber 4, and an air inlet 42 is provided on the lower side wall of the pressure-stabilizing chamber 4; the pressure measuring port 41 and the air inlet 42 are axially opposite to 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 aperture of the pressure measuring port 41 is DN10, and it is connected to the pressure sensor 151 through a thread, and is used to measure the air pressure in the pressure stabilizing chamber 4. In addition, the air inlet 42 is used to supply air to the pressure stabilizing chamber 4, and the 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 blasting time within 5s, preventing excessive data recorded by high-speed photography, and reducing the image data processing volume.

[0041] In this embodiment, the blasting device 14 further includes: a blasting chamber 3, the diameter of which is set to 70 mm, the total volume is 0.3 L, the inner diameter of which is smaller than the pressure stabilizing chamber 4; the blasting chamber 3 is arranged at the upper part of the pressure stabilizing chamber 4 and the blasting chamber 3 is provided with an upper flange 31 and a lower flange 32, a through hole is arranged between the upper flange 31 and the lower flange 32, and the diameter of the through hole is larger than the diameter of the bursting disc 25. Preferably, the inner diameter of the upper flange 31 is about 10 mm, and the kinetic energy of the gas is increased by reducing the cross section of the high-pressure gas here, and the pressure response is more sensitive. The outer diameter of the upper flange 31 is 550 mm, and 8 bolt holes are evenly distributed near the inner side of the outer edge for connecting the bursting disc and the bursting disc holder 25; the inner and outer diameters of the lower flange 32 and the size and position of the bolt holes are consistent with those of the pressure stabilizing chamber flange 2.8.

[0042] In this embodiment, a first flange 44 is disposed on the top of the pressure stabilizing chamber 4 ; the blasting chamber 3 is connected to the pressure stabilizing chamber 4 via the lower flange 32 and the first flange 44 .

[0043] Preferably, the outer diameter of the lower flange 32 of the blasting chamber 3 is consistent with that of 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 side length of which is 800 mm and the material is stainless steel. The thickness of the blasting chamber foundation 43 is 30 mm and is used to support the blasting device 14 .

[0045] In this embodiment, the system also includes: a bursting disc clamping device 2, used to clamp a bursting disc 25, and the bursting disc clamping device 2 includes at least an upper clamping block 22 and a lower clamping block 23. Specifically, the cross-sections of the upper clamping block 22 and the lower clamping block 23 are both square, and a falcon-face through hole is provided in the middle of the upper clamping block 22, and a groove-face through hole is provided in the middle of the lower clamping block 23 for placing the bursting disc; the internal width of the groove surface is greater than or equal to the width of the bursting disc 25. The contact surfaces of the upper clamping block 22 and the lower clamping block 23 are of a falcon groove structure, the upper clamping block 2.2 is a falcon surface, and the lower clamping block 2.3 is a groove surface. The groove width ratio of the upper clamping block 22 and the lower clamping block 23 is 1 to 3 mm greater than the edge width of the bursting piece, and the bursting piece 25 is placed in the groove. The falcon groove is used to position the bursting piece and to fit the falcon groove and the bursting piece 25 through the contact surface of the clamping block. The upper clamping block 22 of the bursting piece clamping device and the lower clamping block 23 are both made of square transparent acrylic glass, the side length of the glass is 380 mm, and the thickness of the clamping block is 25 mm, which is convenient for observing the shape of the bursting piece 25 during the blasting process.

[0046] Specifically, the bursting disc clamping device 2 also includes an upper clamp 21 and a lower clamp 24, the upper clamp 21 and the lower clamp 24 are circular plate flanges, and in addition, the upper clamp 21 and the lower clamp 24 have through holes in their centers, the lower surface of the flange of the upper clamp 21 fits with the upper surface of the upper clamp block 22, and the upper surface of the flange of the lower clamp 24 fits with the lower surface of the lower clamp block 23, the aperture is larger than the diameter of the bursting disc 25 and slightly smaller than the cross-sectional side lengths of the upper clamp block 22 and the lower clamp block 23, the upper clamp 21 and the lower clamp 24 fix the clamp blocks while preventing obstruction of the discharge flow channel; the flange of the lower clamp 24 is consistent with the outer diameter of the upper flange 31 of the blasting chamber, and the bursting disc clamping device 2 is fixedly connected to the blasting chamber 3 through the lower clamp 24 and the upper flange 31.

[0047] In addition, the outer diameter edge of the flange of the upper clamp 21 is evenly distributed with 8 bolt holes, and the outer diameter edge of the flange of the lower clamp 24 is evenly distributed with 8 through holes. The positions and sizes of the upper and lower clamp flange holes are consistent with the blasting chamber circular plate flange. The upper clamp 21, the lower clamp 24 and the upper flange 31 of the blasting chamber are bolted to tighten the blasting disc holder and fix it to the blasting disc 25. Specifically, the flange materials of the upper clamp 21 and the lower clamp 24 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 acquisition frame rate of the image acquisition device 12 is a first set value; the image acquisition device 12 is communicatively connected with 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, placed at a certain distance from the blasting device 14, connected to the image processing device 13 via a network cable 18, and the pressure signal start reception is set as a trigger signal of the image acquisition device 12; specifically, the image acquisition device is a high-speed camera, and the shooting frame rate of the high-speed camera is not less than 10,000 fps. In addition, the high-speed camera has a pixel of not less than 5 million at a frame rate of 10,000 fps; the image processing device 13 can be a PC.

[0050] Example 2

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

[0052] S2. Connect the blasting device, pressure treatment 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 gas source and control system, and turn on the pressure sensor for real-time monitoring.

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

[0055] S4. After receiving the pressure signal, the image processing device immediately triggers the image acquisition device to start working. The high-speed camera starts to shoot the blasting process of the blasting disc at a set frame rate until the blasting is completed.

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

[0057] It is easy for those skilled in the art to understand that the above-mentioned advantageous methods can be freely combined and superimposed without conflict.

[0058] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A blasting test system based on high-speed imaging technology, characterized in that: include: blasting device (14), pressure treatment device (15), image acquisition equipment (12), image processing device (13); The pressure processing device (15) is used to collect a first pressure value in 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 form of the blasting piece (25).

2. The blasting test system based on high-speed imaging technology according to claim 1 is characterized in that: The blasting device (14) comprises: a pressure stabilizing chamber (4) for buffering high-pressure gas entering the chamber, wherein 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 to each other on the side wall of the pressure stabilizing chamber (4).

3. The blasting test system based on high-speed imaging technology according to claim 2 is characterized in that: The blasting device (14) further comprises: a blasting chamber (3), wherein the blasting chamber (3) is arranged at the upper part of 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), a through hole is provided between the upper flange (31) and the lower flange (32), and the diameter of the through hole is greater than the diameter of the blasting disc (25).

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

5. The blasting test system based on high-speed imaging technology according to claim 4 is characterized in that: The lower flange (32) of the blasting chamber (3) has the same outer diameter as the first flange (44).

6. The blasting test system based on high-speed imaging technology according to claim 5, characterized in that: The system further comprises: a bursting disc clamping device (2) for clamping the bursting disc (25), wherein the bursting disc clamping device (2) comprises at least an upper clamping block (22) and a lower clamping block (23); A falcon-faced through hole is arranged in the middle of the upper clamping block (22); A groove through hole is provided in the middle of the lower clamping block (23) for placing a bursting disc; The inner width of the groove surface is greater than or equal to the width of the bursting disc (25).

7. The blasting test system based on high-speed imaging technology according to claim 1 is characterized in that: The system further comprises: an air source (17) electrically connected to an on-site pressure gauge (171), and a rear end of the air source (17) is connected to a control valve (16).

8. The blasting test system based on high-speed imaging technology according to claim 6, characterized in that: The bursting disc clamping device (2) further comprises an upper clamp (21) and a lower clamp (24); The bursting disc clamping device (2) is fixedly connected to the bursting chamber (3) via the lower clamp (24) and the upper flange (31).

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

10. The blasting test system based on high-speed imaging technology according to claim 2, characterized in that: The pressure processing device (15) comprises a pressure sensor (151), and the pressure measuring port (41) is connected to the pressure sensor (151).

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