Material irradiation test device based on explosive gas

Abstract

The invention belongs to the technical field of neutron irradiation test, and particularly relates to a material irradiation test device based on explosive gas. The upper end of a test section is connected with the lower end of a supporting pipe, the supporting pipe is hollow, and an air inlet pipe and an air outlet pipe are located in the supporting pipe; the upper end of the supporting pipe is welded with the flange assembly, the upper end face of the flange assembly is welded with the thermocouple sealing assembly, and the center of the upper end face of the thermocouple sealing assembly is welded with the gas pipe joint; the lower end of the air inlet pipe is connected with the test section and inserted into the test section, and the upper end of the air inlet pipe penetrates through the flange assembly and is directly connected with the air pipe connector. The device is used for carrying out a material irradiation test for releasing the explosive gas in a reactor, establishing a safe and reliable in-pile irradiation test capability of a material sample, realizing temperature control and safe operation of the material irradiation sample, and solving the in-pile irradiation problem of the material for releasing the explosive gas.

Description

Technical Field

[0001] The invention belongs to the technical field of neutron irradiation testing, and in particular relates to a material irradiation testing device based on explosive gas. Background Art

[0002] Before any nuclear material is used in industry, it must undergo irradiation test to verify its various performances in the radiation environment. Therefore, the irradiation test results of the material will determine whether the nuclear material can be used in industry. For the implementation of nuclear material irradiation experiment, the main equipment is the irradiation device. The performance of the irradiation device will also determine whether the irradiation experiment is successful and whether the test results after irradiation are credible. Due to the structural characteristics of the reactor itself, there are differences in the axial neutron injection of the irradiation channel, resulting in uneven axial temperature, and then there are differences in the temperature of the material samples in the irradiation device.

[0003] At present, with the demand for irradiation of new materials, especially in-pile testing of materials that release explosive gases, safety is of paramount importance during irradiation testing. However, in order to ensure the smooth completion of in-pile irradiation of materials and the safety of irradiation testing and research reactors, it is necessary to improve the design of the existing irradiation device and optimize the in-pile testing method to enable in-pile irradiation of materials that release explosive gases. Summary of the invention

[0004] The technical problem solved by the present invention is as follows: a material irradiation test device based on releasing explosive gas is provided, which is used to carry out irradiation test of materials releasing explosive gas in a reactor, establish safe and reliable irradiation test capability of material samples in the reactor, realize temperature control and safe operation of material irradiation samples, and solve the problem of in-pile irradiation of materials releasing explosive gas.

[0005] The technical solution adopted by the present invention is:

[0006] A material irradiation test device based on releasing explosive gas, comprising an air inlet pipe, an air outlet pipe and a support pipe, and also comprising a test section, a flange assembly, a thermocouple sealing assembly and an air pipe joint; the upper end of the test section is connected to the lower end of the support pipe, the interior of the support pipe is hollow, and the air inlet pipe and the air outlet pipe are located inside the support pipe; the upper end of the support pipe is welded to the flange assembly, the upper end face of the flange assembly is welded to the thermocouple sealing assembly, and the air pipe joint is welded to the center of the upper end face of the thermocouple sealing assembly; the lower end of the air outlet pipe is through-connected with the test section, the upper end passes through the flange assembly to be connected to the thermocouple sealing assembly, the lower end of the air inlet pipe is connected to the test section and inserted into the interior of the test section, and the upper end passes through the flange assembly to be directly connected to the air pipe joint.

[0007] The test section includes a guide tube, a connecting tube, a top cover, a spring assembly, an irradiation tube, a capsule, a partition plate, a lower clamp block, a support block, a bottom cover, a neutron detection box, a support rod, an upper clamp block, a compensation block, an electric heating rod, a thermocouple and an overload protector; the top cover and the bottom cover are respectively welded to the upper and lower ends of the irradiation tube, the other end of the top cover is fixedly connected to the guide tube through a connecting tube, and the lower end of the outlet pipe is directly welded to the top cover; a cavity is formed in the irradiation tube, and the spring assembly, the upper clamp block, the lower clamp block and the support block are axially stacked in sequence from top to bottom in the cavity, a partition plate is provided between the lower clamp block and the upper clamp block, and a partition plate is installed between the lower clamp block and the support block; three through holes are axially opened in the upper clamp block, which are arranged in a circle, and a capsule is installed in the hole; the overload protector is connected to the bottom of the capsule and installed in the circular hole of the lower clamp block; the neutron detection box is arranged at both ends of the upper clamp block, and a support rod is installed in the middle.

[0008] The capsule comprises a capsule bottom cover, a capsule clamp, a sample, a capsule protection tube, a fixed cover and a capsule top cover; the capsule bottom cover and the capsule top cover are respectively welded to the two ends of the capsule protection tube to form a cavity in the capsule protection tube, in which a capsule clamp is installed, and the capsule clamp wraps the sample; a thermocouple is installed between the sample and the capsule clamp, and the thermocouple passes through the capsule top cover and is connected to the measurement and control system through an air outlet pipe and a thermocouple sealing assembly lead-out device.

[0009] The overload protector comprises a connecting short tube, an overload shell and a bursting membrane. The connecting short tube is welded to the bottom of the overload shell and penetrates therethrough. The bursting membrane is welded to the overload shell through a connecting ring, and the protruding part of the bursting membrane extends to the inside of the overload shell.

[0010] The upper clamping block is provided with three holes for electric heating rods, which are arranged in a circle and distributed between the capsule holes. The electric heating rods are installed in the holes, and the wires pass through the air outlet pipe and the lead-out device of the thermocouple sealing component to be connected to the measurement and control system; three holes for thermocouples are provided between the capsule holes, which are arranged in a circle, and the thermocouple wires pass through the air outlet pipe and the lead-out device of the thermocouple sealing component to be connected to the measurement and control system; the upper clamping block is provided with air inlet pipe holes and compensation blocks, which are symmetrically distributed.

[0011] The capsule top cover is processed with a guide tube, the capsule bottom cover is processed with a vent hole, the capsule clamp is an inner square and outer circle structure, and a thermocouple mounting groove is processed on the inner side surface; three ribs are processed on the side of the fixed cover and are evenly distributed around the circumference; two capsule clamps are spliced ​​to form a cylinder with a sample inside, and the two ends are fixed with fixed covers to be assembled into a cylindrical assembly, which is installed as a whole on the capsule protection tube; the outer layer of the capsule protection tube is axially processed with two groups of ribs, which are evenly distributed around the circumference.

[0012] After the capsule clamp is installed in the capsule protection tube, the ribs on the side of the fixed cover contact the inner layer of the capsule protection tube, forming an annular gap layer A between the outer side of the capsule clamp and the inner wall of the capsule protection tube; after the capsule is installed in the upper clamp, the ribs on the outer side of the capsule protection tube contact the inner side of the axial hole of the upper clamp, forming an annular gap layer B between the inner layer of the hole and the outer side of the capsule protection tube.

[0013] The outer layer of the upper clamp block is processed with ribs, which are evenly distributed in the circumferential direction. After the upper clamp block is installed on the irradiation tube, an annular gap layer C is formed between the inner side of the irradiation tube and the outer layer of the upper clamp block.

[0014] There are two air inlet pipes, which are connected to different air sources respectively; the structural type of the sample can be block, rod and disc; the capsule clamp block is processed with a thermocouple installation groove; the capsule clamp block is divided by a cylinder with a square inside and a round outside.

[0015] A thermocouple is installed in the capsule, which is led out from a guide tube on the capsule top cover. The overload protector is connected to the capsule. Inert gas is injected into the capsule and sealed at the guide tube outlet to form a closed space inside the capsule.

[0016] The overload shell and the lower clamp block have no processed ribs on the outer layer, the outer wall of the overload shell is closely fitted with the inner wall of the hole of the lower clamp block, and the outer wall of the lower clamp block is closely fitted with the inside of the irradiation tube.

[0017] The thickness of the annular gap layer A is 0.2-0.5 mm, the thickness of the annular gap layer B is 0.12-0.2 mm, and the thickness of the annular gap layer C is 0.15-0.21 mm; the annular gap layer A is filled with argon, and the annular gap layers B and C are filled with a mixed gas of argon and helium; the gas entering the irradiation device from the air inlet pipe fills the annular gap layer B and the annular gap layer C; the thickness of the bursting membrane is 0.05-0.35 mm.

[0018] The number of the thermocouples is not less than 6. The thermocouple installed in the capsule measures the temperature of the sample online, and the thermocouple installed in the upper clamping block measures the temperature of the upper clamping block online.

[0019] The material of the lower clamping block is a material with high thermal conductivity, and the material of the overload shell is a material with high mechanical properties.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention provides a material irradiation test device based on the release of explosive gas, which is used to carry out irradiation tests on materials that release explosive gas in a reactor, establish a safe and reliable in-pile irradiation test capability for material samples, achieve temperature control and safe operation of material irradiation samples, and solve the problem of in-pile irradiation of materials that release explosive gas.

[0022] (2) The present invention provides a material irradiation test device based on releasing explosive gas, which can realize the safe irradiation of materials releasing explosive gas in a research reactor and has the ability to release explosive gas materials.

[0023] (3) The present invention provides a material irradiation test device based on the release of explosive gas, which adopts a modular design to solve the problem of carrying out safe irradiation of materials that release explosive gas in a research reactor and realize macroscopic evaluation of the gas release performance of the material.

[0024] (4) The present invention provides a material irradiation test device based on the release of explosive gas, which has a small number of parts and components, is capable of simultaneously irradiating multiple materials with different gas release properties in the pile, and has the conditions for adjusting and online monitoring of the test temperature.

[0025] (5) The material irradiation test device based on the release of explosive gas provided by the present invention can realize the irradiation of a large range of gas-releasing materials, and achieve the performance verification of multiple materials in the same device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a material irradiation test device based on releasing explosive gas provided by the present invention;

[0027] Figure 2 It is a schematic diagram of the test section structure;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the test section II;

[0029] Figure 4 This is a schematic diagram of the upper clamping block structure of the test section;

[0030] Figure 5 Schematic diagram of the capsule structure;

[0031] Figure 6 It is a schematic diagram of the cross-sectional structure of capsule II-II;

[0032] Figure 7 It is a schematic diagram of the structure of the fixed end cover of the capsule;

[0033] Figure 8 It is a schematic diagram of the capsule clamp structure;

[0034] Fig. 9 It is a schematic diagram of the structure of the capsule protection tube;

[0035] Fig.10 This is a schematic diagram of the overload protector structure.

[0036] In the figure:

[0037] 1. Test section, 2. Inlet pipe, 3. Outlet pipe, 4. Support pipe, 5. Flange assembly, 6. Thermocouple sealing assembly, 7. Air pipe joint;

[0038] 10. Guide tube, 11. Connecting tube, 12. Top cover, 13. Spring assembly, 14. Irradiation tube, 15. Capsule, 16. Separator, 17. Lower clamping block, 18. Support block, 19. Bottom cover, 20. Neutron detection box, 21. Support rod, 22. Upper clamping block, 23. Compensation block, 24. Electric heating rod, 25. Thermocouple, 26. Overload protector;

[0039] 15a. Capsule bottom cover, 15b. Capsule clamping block, 15c. Sample, 15d. Capsule protection tube, 15e. Fixed cover, 15f. Capsule top cover, 15h. Connecting short tube, 15i. Overload shell, 15k. Bursting membrane. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figures 1 to 10As shown, the present invention provides a material irradiation test device based on releasing explosive gas, including an air inlet pipe 2, an air outlet pipe 3 and a support pipe 4; and also includes a test section 1, a flange assembly 5, a thermocouple sealing assembly 6 and an air pipe joint 7;

[0044] The upper end of the test section 1 is connected to the lower end of the support tube 4, the support tube 4 is hollow inside, and the air inlet pipe 2 and the air outlet pipe 3 are located inside the support tube 4; the upper end of the support tube 4 is welded to the flange assembly 5, the upper end face of the flange assembly 5 is welded to the thermocouple sealing assembly 6, and the center of the upper end face of the thermocouple sealing assembly 6 is welded to the air pipe joint 7; the lower end of the air outlet pipe 3 is connected to the test section 1, and the upper end passes through the flange assembly 5 and is connected to the thermocouple sealing assembly 6; the lower end of the air inlet pipe 2 is connected to the test section 1 and inserted into the test section 1, and the upper end passes through the flange assembly 5 and is directly connected to the air pipe joint 7, and there are 2 air inlet pipes 2 in total;

[0045] The test section 1 includes a guide tube 10, a connecting tube 11, a top cover 12, a spring assembly 13, an irradiation tube 14, a capsule 15, a partition plate 16, a lower clamping block 17, a support block 18, a bottom cover 19, a neutron detection box 20, a support rod 21, an upper clamping block 22, a compensation block 23, an electric heating rod 24, a thermocouple 25 and an overload protector 26; the top cover 12 and the bottom cover 19 are respectively welded to the upper and lower ends of the irradiation tube 14, and the top cover 12 is The other end is fixedly connected to the guide tube 10 through the connecting tube 11, and the lower end of the outlet pipe 3 is directly welded to the top cover 12; a cavity is formed in the irradiation tube 14, and the spring assembly 13, the upper clamp block 22, the lower clamp block 17 and the support block 18 are axially stacked in the cavity from top to bottom, and a partition plate 16 is provided between the lower clamp block 17 and the upper clamp block 22, and the partition plate 16 is installed between the lower clamp block 17 and the support block 18. The partition plate 16 is mainly The purpose is to fix the parts installed inside the upper clamping block 22 to prevent them from falling off or falling out; the upper clamping block 22 has three through holes axially opened in a circular arrangement, and capsules 15 are installed in the holes; the overload protector 26 is connected to the bottom of the capsule 15 and installed in the circular hole of the lower clamping block 17; there are three groups of capsules 15, which are respectively loaded with different samples 15c or the same sample 15c. According to the experimental requirements, an electric heating rod 24 and a thermocouple 25 are provided between two adjacent capsules 15, and the electric heating rod 24 and the thermocouple 25 are connected to the measurement and control system outside the device to realize online measurement of temperature; at the same time, the overload protector 26 can be designed with different pressures according to different experimental requirements; after the electric heating rod 24 and the thermocouple 25 wires are led out from the air outlet pipe 3, they pass through the thermocouple sealing assembly 6 respectively, and are sealed here, and the sealing design pressure is consistent with the design pressure of the overload protector 26.

[0046] The capsule 15 comprises a capsule bottom cover 15a, a capsule clamp 15b, a capsule protection tube 15d, a fixed cover 15e and a capsule top cover 15f; the capsule bottom cover 15a and the capsule top cover 15f are respectively welded to the two ends of the capsule protection tube 15d, forming a cavity in the capsule protection tube 15d, and the capsule clamp 15b is installed in the cavity, and the capsule clamp 15b wraps the sample 15c; a thermocouple 25 is installed between the sample 15c and the capsule clamp 15b, and the thermocouple 25 passes through the capsule top cover 15f, and passes through the air outlet pipe 3 and the thermocouple sealing assembly 6 to be connected to the measurement and control system;

[0047] The overload protector 26 includes a connecting short tube 15h, an overload shell 15i and a bursting membrane 15k. The connecting short tube 15h is welded to the bottom of the overload shell 15i and penetrates therethrough. The bursting membrane 15k is welded to the overload shell 15i through a connecting ring, and the protruding portion of the bursting membrane 15k extends into the interior of the overload shell 15i.

[0048] Among them, in the embodiment of the present application, three holes for electric heating rods 24 are opened on the upper clamping block 22, which are arranged in a circle and distributed between the holes of the capsule 15. The electric heating rods 24 are installed in the holes, which are mainly used for thermal compensation. Different powers are set according to experimental requirements; the wires pass through the outlet pipe 3 and the thermocouple sealing assembly 6 to connect to the measurement and control system; three holes for thermocouples 25 are opened between the holes of the capsule 15, which are arranged in a circle, and the wires of the thermocouples 25 pass through the outlet pipe 3 and the thermocouple sealing assembly 6 to connect to the measurement and control system. In the measurement and control system, the thermocouple 25 directly measures the temperature of the clamp online to ensure that the temperature of the clamp will not exceed the melting point of the material; the upper clamp 22 is provided with 2 holes for the air inlet pipe and a compensation block 23, which are symmetrically distributed; the neutron detection box 20 is arranged at both ends of the upper clamp 22, and a support rod 21 is installed in the middle; the lower clamp 17 is used as a support member in the device, and when necessary, the capsule 15, the electric heating rod 24 and the thermocouple 25 can be installed like the upper clamp 22, so as to realize the loading of more samples 15c.

[0049] Among them, in the embodiment of the present application, the capsule top cover 15f is processed with a guide tube, the capsule bottom cover 15a is processed with a vent hole, the capsule clamp 15b is an inner square and outer circle structure, and a thermocouple 25 mounting groove is processed on the inner side surface; the capsule clamp 15b is first a metal cylinder, which is processed into an inner square and outer circle structure and is separated along the diagonal of the inner square hole to ensure that the sample 15c can be smoothly taken out after irradiation; three ribs are processed on the side of the fixed cover 15e, which are evenly distributed around the circumference; the two capsule clamps 15b are spliced ​​to form a cylinder with the sample inside, and the two ends are fixed with the fixed covers 15e to be assembled into a cylindrical assembly, which is installed as a whole in the capsule protection tube 15d, and the fixed cover 15e can ensure that the two capsule clamps 15b will not separate; the outer layer of the capsule protection tube 15d is axially processed with two groups of ribs, which are evenly distributed around the circumference.

[0050] Among them, in the embodiment of the present application, after the capsule clamp 15b is installed on the capsule protection tube 15d, the ribs on the side of the fixed cover 15e contact the inner layer of the capsule protection tube 15d, and an annular gap layer A is formed between the outer side of the capsule clamp 15b and the inner wall of the capsule protection tube 15d; after the capsule 15 is installed on the upper clamp 22, the ribs on the outer side of the capsule protection tube 15d contact the inner side of the axial hole of the upper clamp 22, and an annular gap layer B is formed between the inner layer of the hole and the outer side of the capsule protection tube 15d. After the capsule 15 is assembled, an inert gas is filled into the annular gap layer A to form an insulation layer. Due to the self-heating property of the material, a large temperature difference will be formed on both sides of the annular gap layer A, with a high temperature inside and a low temperature outside. After the capsule 15 is installed on the upper clamp 22, an inert gas is filled into the annular gap layer B to form an insulation layer. Due to the self-heating property of the material, a large temperature difference will be formed on both sides of the annular gap layer B, with a high temperature inside and a low temperature outside.

[0051] Among them, in the embodiment of the present application, the outer layer of the upper clamp block 22 is processed with ribs, and the ribs are evenly distributed in the circumferential direction. After the upper clamp block 22 is installed on the irradiation tube 14, the inner side of the irradiation tube 14 and the outer layer of the upper clamp block 22 form an annular gap layer C. After the device is assembled, an inert gas is filled into the annular gap layer C to form an insulation layer. Due to the self-heating property of the material, a large temperature difference will be formed on both sides of the annular gap layer C, with high temperature inside and low temperature outside. Based on the above three layers of annular gap layers, four regions are formed, forming a large temperature gradient in the radial direction of the device, which satisfies the high temperature irradiation in a low temperature environment.

[0052] Among them, in the embodiment of the present application, there are two above-mentioned air inlet pipes 2, which are connected to different air sources respectively; the structural type of the sample 15c can be block-shaped, rod-shaped and disc-shaped; the capsule clamp block 15b is processed with a thermocouple 25 installation groove; the capsule clamp block 15b is separated by a cylinder with a square inside and a round outside.

[0053] Among them, in the embodiment of the present application, a thermocouple 25 is installed in the above-mentioned capsule 15, and the thermocouple 25 is led out from the guide tube of the capsule top cover 15f. The overload protector 26 is connected with the capsule 15, and an inert gas is injected into the capsule and sealed at the outlet of the guide tube. A closed space is formed inside the capsule 15. When the pressure of the gas released by the material exceeds the limit value of the overload protector 26, the bursting membrane 15k will rupture and release high-pressure gas to ensure the safety of the test device.

[0054] Among them, in the embodiment of the present application, the outer layers of the above-mentioned overload shell 15i and the lower clamp block 17 are not processed with ribs, the outer wall of the overload shell 15i is tightly fitted with the inner wall of the hole of the lower clamp block 17, and the outer wall of the lower clamp block 17 is tightly fitted with the inside of the irradiation tube 14. When conducting in-pile tests, since there is no gap between the overload shell 15i and the lower clamp block 17, and between the outer wall of the lower clamp block 17 and the inside of the irradiation tube 14, no insulation layer is formed, and the internal heat is quickly discharged, so that the overload protector 26 can maintain a low temperature state for a long time, thereby ensuring its performance.

[0055] Among them, in the embodiment of the present application, the thickness of the annular gap layer A is 0.2-0.5 mm, the thickness of the annular gap layer B is 0.12-0.2 mm, and the thickness of the annular gap layer C is 0.15-0.21 mm; the annular gap layer A is filled with argon, and the annular gap layer B and the annular gap layer C are filled with a mixed gas of argon and helium; the gas entering the irradiation device from the air inlet pipe 2 fills the annular gap layer B and the annular gap layer C. According to the experimental requirements, the thickness of the annular gap layers A, B and C can be flexibly adjusted to achieve a larger range of temperature control, and the range of 200°C to 900°C can be achieved; the thickness of the bursting membrane 15k is 0.05-0.35 mm.

[0056] Among them, in the embodiment of the present application, the materials of the capsule clamp block 15b and the fixing cover 15e are molybdenum metal, the compensation block 23 is molybdenum alloy and aluminum alloy; the power of the electric heating rod 24 is 0.5-2KW. During the experiment, different materials of the compensation block 23 and electric heating rods 24 of different powers can be selected according to needs to achieve different temperature control, and even achieve different temperatures between the three capsules, so as to achieve multiple irradiation temperatures in the same device.

[0057] Among them, in the embodiment of the present application, the number of the above-mentioned thermocouples 25 is not less than 6, the thermocouple 25 installed in the capsule 15 measures the temperature of the sample 15c online, and the thermocouple installed in the upper clamp 22 measures the temperature of the upper clamp 22 online.

[0058] In the embodiment of the present application, the material of the lower clamping block 17 is a material with high thermal conductivity, and the material of the overload housing 15i is a material with high mechanical properties.

[0059] Embodiment 1:

[0060] like Figure 5 As shown, the overload protector 26 includes a connecting short tube 15h, an overload shell 15i and a bursting membrane 15k. The connecting short tube 15h is welded to the bottom of the overload shell 15i and is connected thereto. The bursting membrane 15k is welded to the overload shell 15i through a connecting ring, and the convex part of the bursting membrane 15k extends to the inside of the overload shell 15i. After the device is assembled, during the experiment, as the material gas is released, the pressure of the gas in the capsule 16 and the overload protector 26 continues to increase. When the pressure exceeds the design pressure of the overload protector 26, the bursting membrane 15k is damaged, and the explosive gas enters the inert gas environment of the irradiation device, ensuring that the pressure in the capsule 16 is limited to a lower range. The design of the overload protector 26 is mainly based on the high temperature of the irradiated material and the performance of the released gas in the irradiation environment, ensuring that the overload protector 26 is intact during the entire experiment and the internal gas does not contact the air.

[0061] Embodiment 2:

[0062] like Figure 3 , Figure 5 and Fig.10 As shown, for different materials, an overload protector 26 is designed according to the characteristics of the gas released by the material. Different materials are loaded in the three capsules 15, and different overload protectors 26 are selected to be connected to the capsules 15 to achieve simultaneous irradiation of materials of different gas release types.

[0063] Embodiment 3:

[0064] like Figure 5 and Fig.10 As shown, under the premise of unknown gas release performance of irradiated materials, the design pressure of the overload protector 26 is gradient based on preliminary analysis, and the pressure range of the released gas is explored through experiments.

[0065] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A material irradiation test device based on releasing explosive gas, comprising an air inlet pipe (2), an air outlet pipe (3) and a support pipe (4), characterized in that: It also includes a test section (1), a flange assembly (5), a thermocouple sealing assembly (6) and an air pipe joint (7); the upper end of the test section (1) is connected to the lower end of the support tube (4), the interior of the support tube (4) is hollow, and the air inlet pipe (2) and the air outlet pipe (3) are located inside the support tube (4); the upper end of the support tube (4) is welded to the flange assembly (5), the upper end surface of the flange assembly (5) is welded to the thermocouple sealing assembly (6), and the air pipe joint (7) is welded to the center of the upper end surface of the thermocouple sealing assembly (6); the lower end of the air outlet pipe (3) is connected to the test section (1), the upper end passes through the flange assembly (5) and is connected to the thermocouple sealing assembly (6), the lower end of the air inlet pipe (2) is connected to the test section (1) and is inserted into the interior of the test section (1), and the upper end passes through the flange assembly (5) and is directly connected to the air pipe joint (7).

2. The material irradiation test device based on releasing explosive gas according to claim 1, characterized in that: The test section (1) comprises a guide tube (10), a connecting tube (11), a top cover (12), a spring assembly (13), an irradiation tube (14), a capsule (15), a partition plate (16), a lower clamping block (17), a support block (18), a bottom cover (19), a neutron detection box (20), a support rod (21), an upper clamping block (22), a compensation block (23), an electric heating rod (24), a thermocouple (25) and an overload protector (26); the top cover (12) and the bottom cover (19) are respectively welded to the upper and lower ends of the irradiation tube (14); the other end of the top cover (12) is fixedly connected to the guide tube (10) through the connecting tube (11); the lower end of the air outlet pipe (3) is directly welded to the top cover (12); A cavity is formed in the care tube (14), and a spring assembly (13), an upper clamping block (22), a lower clamping block (17) and a support block (18) are axially stacked in sequence from top to bottom in the cavity, a partition plate (16) is provided between the lower clamping block (17) and the upper clamping block (22), and the partition plate (16) is installed between the lower clamping block (17) and the support block (18); three through holes are axially opened in the upper clamping block (22), arranged in a circle, and capsules (15) are installed in the holes; the overload protector (26) is connected to the bottom of the capsule (15) and installed in the circular hole of the lower clamping block (17); the neutron detection box (20) is arranged at both ends of the upper clamping block (22), and a support rod (21) is installed in the middle.

3. The material irradiation test device based on releasing explosive gas according to claim 2, characterized in that: The capsule (15) comprises a capsule bottom cover (15a), a capsule clamp (15b), a sample (15c), a capsule protection tube (15d), a fixed cover (15e) and a capsule top cover (15f); the capsule bottom cover (15a) and the capsule top cover (15f) are respectively welded to the two ends of the capsule protection tube (15d), forming a cavity in the capsule protection tube (15d), and the capsule clamp (15b) is installed in the cavity, and the capsule clamp (15b) wraps the sample (15c); a thermocouple (25) is installed between the sample (15c) and the capsule clamp (15b), and the thermocouple (25) passes through the capsule top cover (15f), passes through the air outlet pipe (3) and the thermocouple sealing component (6), and is connected to the measurement and control system through the lead-out device.

4. The material irradiation test device based on releasing explosive gas according to claim 3 is characterized in that: The overload protector (26) comprises a connecting short tube (15h), an overload housing (15i) and a bursting membrane (15k). The connecting short tube (15h) is welded to the bottom of the overload housing (15i) and is connected thereto. The bursting membrane (15k) is welded to the overload housing (15i) via a connecting ring. The protruding portion of the bursting membrane (15k) extends into the interior of the overload housing (15i).

5. A material irradiation test device based on releasing explosive gas according to claim 2, characterized in that: The upper clamping block (22) is provided with three holes for electric heating rods (24), which are arranged in a circle and distributed between the holes of the capsule (15). The electric heating rods (24) are installed in the holes, and the wires pass through the air outlet pipe (3) and the thermocouple sealing component (6) to connect to the measurement and control system; three holes for thermocouples (25) are provided between the holes of the capsule (15), which are arranged in a circle, and the wires of the thermocouples (25) pass through the air outlet pipe (3) and the thermocouple sealing component (6) to connect to the measurement and control system; the upper clamping block (22) is provided with holes for the air inlet pipe (2) and the compensation block (23), which are symmetrically distributed.

6. The material irradiation test device based on releasing explosive gas according to claim 3, characterized in that: The capsule top cover (15f) is processed with a guide tube, the capsule bottom cover (15a) is processed with a vent hole, the capsule clamp (15b) is a square inside and round outside structure, and a thermocouple (25) installation groove is processed on the inner side surface; three ribs are processed on the side of the fixed cover (15e), which are evenly distributed around the circumference; two capsule clamps (15b) are spliced ​​to form a cylinder with a sample inside, and the two ends are fixed with the fixed covers (15e) to be assembled into a cylindrical assembly, which is installed as a whole on the capsule protection tube (15d); the outer layer of the capsule protection tube (15d) is axially processed with two groups of ribs, which are evenly distributed around the circumference.

7. A material irradiation test device based on releasing explosive gas according to claim 3, characterized in that: After the capsule clamp (15b) is installed in the capsule protection tube (15d), the ribs on the side of the fixed cover (15e) contact the inner layer of the capsule protection tube (15d), and an annular gap layer A is formed between the outer side of the capsule clamp (15b) and the inner wall of the capsule protection tube (15d); after the capsule (15) is installed in the upper clamp (22), the ribs on the outer side of the capsule protection tube (15d) contact the inner side of the axial hole of the upper clamp (22), and an annular gap layer B is formed between the inner layer of the hole and the outer side of the capsule protection tube (15d).

8. A material irradiation test device based on releasing explosive gas according to claim 7, characterized in that: The outer layer of the upper clamping block (22) is processed with ribs, which are evenly distributed in the circumferential direction. After the upper clamping block (22) is installed on the irradiation tube (14), an annular gap layer C is formed between the inner side of the irradiation tube (14) and the outer layer of the upper clamping block (22).

9. A material irradiation test device based on releasing explosive gas according to claim 3, characterized in that: There are two air inlet pipes (2), which are connected to different air sources respectively; the structure type of the sample (15c) can be block-shaped, rod-shaped or disc-shaped; the capsule clamp block (15b) is processed with a thermocouple (25) installation groove; the capsule clamp block (15b) is divided by a cylinder with a square inside and a round outside.

10. The material irradiation test device based on releasing explosive gas according to claim 3, characterized in that: A thermocouple (25) is installed in the capsule (15), and the thermocouple (25) is led out from the guide tube of the capsule top cover (15f). The overload protector (26) is connected to the capsule (15), and an inert gas is injected into the capsule (15), and the guide tube outlet is sealed, so that a closed space is formed inside the capsule (15).

11. A material irradiation test device based on releasing explosive gas according to claim 4, characterized in that: The outer layers of the overload shell (15i) and the lower clamp block (17) are not processed with ribs, the outer wall of the overload shell (15i) is tightly fitted with the inner wall of the hole of the lower clamp block (17), and the outer wall of the lower clamp block (17) is tightly fitted with the inside of the irradiation tube (14).

12. The material irradiation test device based on releasing explosive gas according to claim 8, characterized in that: The thickness of the annular gap layer A is 0.2-0.5 mm, the thickness of the annular gap layer B is 0.12-0.2 mm, and the thickness of the annular gap layer C is 0.15-0.21 mm; the annular gap layer A is filled with argon, and the annular gap layers B and C are filled with a mixed gas of argon and helium; the gas entering the irradiation device from the air inlet pipe (2) fills the annular gap layer B and the annular gap layer C; the thickness of the bursting membrane (15k) is 0.05-0.35 mm.

13. The material irradiation test device based on releasing explosive gas according to claim 9, characterized in that: The number of the thermocouples (25) is no less than 6. The thermocouple (25) installed in the capsule (15) measures the temperature of the sample (15c) online, and the thermocouple installed in the upper clamping block (22) measures the temperature of the upper clamping block (22) online.

14. The material irradiation test device based on releasing explosive gas according to claim 8, characterized in that: The material of the lower clamping block (17) is a material with high thermal conductivity, and the material of the overload housing (15i) is a material with high mechanical properties.

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