Titanium plate stress detection device and detection method thereof

Abstract

The invention belongs to the technical field of titanium plate detection, and discloses a titanium plate stress detection device, which comprises a main body shell, a display screen arranged on the top of the main body shell, a butt joint port arranged on one side of the main body shell, a heat preservation assembly arranged in the main body shell, and a conveying assembly arranged on the upper side in the heat preservation assembly, the conveying device is used for conveying samples; through cooperation of structures such as the conveying assembly and the output assembly, when a sample is taken and placed, external air is isolated from a heat preservation cavity and does not make direct contact with the heat preservation cavity, the interior of a moisture treatment cavity is separated through a conveying disc, and when the sample is placed, air entering the moisture treatment cavity can be defrosted when passing through a defrosting assembly; when the sample is taken out, the sample is directly taken out from the interior of the heat preservation cavity through the fixed clamping jaw and then conveyed to the outer side, and the nitrogen in the heat preservation cavity does not exchange with the air in the whole process.

Description

Technical Field

[0001] This invention belongs to the field of titanium plate testing technology, specifically a titanium plate stress testing device and its testing method. Background Technology

[0002] Titanium plates used in spacecraft and liquefied natural gas (LNG) applications need to withstand sufficiently low temperatures and exhibit adequate resistance under cryogenic conditions. The main focus is on testing their performance stability under extreme low-temperature environments. Low-temperature impact testing of titanium plates allows for the correction of stress safety factors using impact data and the reverse verification of the harmfulness of residual welding stress through impact testing. Simultaneously, fracture surface scanning and stress distribution simulation can be performed on titanium plates that fracture at low temperatures to trace the root cause of failure. Before impact testing, titanium plates need to undergo cryogenic treatment to simulate the environmental conditions of spacecraft and LNG. This cryogenic treatment requires multiple pre-cooling stages, a process that can last from 45 to 90 minutes. Therefore, to ensure work efficiency, multiple samples need to be processed simultaneously.

[0003] After the titanium plate sample is pre-cooled, it needs to be immersed in liquid nitrogen for cryogenic treatment. However, the titanium plate sample cannot be immersed in liquid nitrogen for a long time, so an insulated box is required for insulation. However, the existing insulated box requires manual placement of the sample into the box and removal of the sample from the box during installation. This process requires opening and closing the box multiple times, which affects the insulation effect and may introduce moisture and frost, affecting the insulation effect. At the same time, the time spent manually installing the sample will cause the sample temperature to rise, affecting the accuracy of the final test. Therefore, a titanium plate stress detection device and its detection method are provided. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a titanium plate stress detection device and its detection method.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a titanium plate stress detection device, comprising a main body shell, a display screen mounted on the top of the main body shell, a connection interface provided on one side of the main body shell, and a heat insulation component installed inside the main body shell, and further comprising: A conveying assembly, located on the upper side inside the insulation assembly, is used to convey the sample. The support assembly, which is installed inside the insulation assembly, is used to keep the sample warm; A defrosting assembly, located on the side of the insulation assembly, is used to defrost the sample. The output component, installed inside the main housing, is used to deliver the sample into the impact testing machine. The conveying assembly includes a conveying disc rotatably connected inside the insulation assembly. The conveying disc has three placement slots arranged in a ring in the middle. A pair of baffles are fixedly connected inside each placement slot. The support assembly includes a support plate rotatably connected inside the insulation assembly. A second motor is driven to the top of the support plate, and multiple placement slots are arranged in a ring on the lower side of the support plate.

[0006] Preferably, the heat insulation component includes a heat insulation shell fixedly connected inside the main body shell. The heat insulation shell has a moisture treatment chamber and a heat insulation chamber inside. Vacuum heat insulation chambers are provided on the outer side and the lower side of the heat insulation shell. The heat insulation chamber is connected to a liquid nitrogen tank through pipes and conveying equipment.

[0007] Preferably, the conveyor plate is located inside the moisture treatment chamber, the support plate is located inside the insulation chamber and the middle of the support plate penetrates the heat insulation shell and extends to the top of the main body shell, and the second motor is fixedly connected to the top of the heat insulation shell.

[0008] Preferably, the conveying assembly further includes a conveying channel penetrating the top of the heat insulation shell, and the conveying channel connects the moisture treatment chamber and the heat insulation chamber. The outer side of the conveying disc is provided with a toothed groove, and the lower side of the conveying disc is provided with an opening corresponding to the placement groove. A transmission gear set that meshes with the toothed groove is provided on the outer side of the conveying disc, and a first motor for driving the transmission gear set is provided on the lower side of the transmission gear set.

[0009] Preferably, the defrosting assembly includes a suction device fixedly connected to the main body shell, a nitrogen input pipe is provided at the upper end of the suction device, a nitrogen nozzle is fixedly connected to one end of the nitrogen input pipe, and a nitrogen output pipe is fixedly connected to the lower side of the suction device.

[0010] Preferably, a nitrogen tank is connected to the outside of the nitrogen input pipe, and the bottom of the nitrogen nozzle and one end of the nitrogen output pipe are both connected to the moisture treatment chamber. When the placement tank is moved to be perpendicular to the nitrogen nozzle, the nitrogen nozzle and the placement tank form a sealed cavity inside the moisture treatment chamber, and the nitrogen output pipe cooperates with the nitrogen nozzle and the placement tank to form a unidirectional flow nitrogen circuit.

[0011] Preferably, the output component includes a first guide rail and a second guide rail located on the upper side of the heat insulation shell and fixedly connected to the main shell. A fixed gripper is installed on the upper end of the first guide rail, and a conveying tray is installed in the middle of the second guide rail. A movable gripper fixedly connected to the main shell is provided on the upper side of one end of the second guide rail. The fixed gripper can move along the first guide rail to the inside of the heat insulation cavity, and the conveying tray can move along the second guide rail under the fixed gripper and the movable gripper.

[0012] Preferably, a first telescopic rod and a second adjustment frame are installed on the side of the main body shell. The first telescopic rod is fixedly connected to the first adjustment frame at its output end, and a second telescopic rod is fixedly connected to the main body shell on one side of the second adjustment frame.

[0013] Preferably, the first adjustment frame is located under the movable gripper, the first adjustment frame and the second adjustment frame are plugged into each other, and the output end of the second telescopic rod faces the interface and passes through the inside of the interface.

[0014] A method for stress testing of titanium plates includes the following steps: S1. After cleaning the titanium plate, perform a cooling operation; First stage: The titanium plate sample is pre-cooled from 0°C to -80°C by using dry ice sublimation cooling to -78.5°C or a compressed air refrigeration machine to generate low-temperature gas. Second stage: The titanium plate sample is cooled to -110℃ using an alcohol + dry ice mixed bath or cryogenically cooled to -150℃ using a special low-temperature silicone oil bath. Third stage: Suspend the titanium plate 10-15cm above the liquid nitrogen tank and slowly cool it down for 10 minutes using the evaporated cold nitrogen gas. Fourth stage: The pre-cooled sample is gradually immersed in liquid nitrogen in three stages, increasing the immersion depth by 25% → 50% → 100%, with a 2-minute interval between each immersion. S2. Move the titanium plate into the insulation box for insulation, and then move it to the impact testing machine and adjust the impact testing machine. S3. Align the interface of the insulation box with the clamp of the impact tester sample, transport the sample into the impact tester, and complete the impact test.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the coordinated arrangement of conveying and output components, facilitates the isolation of external air from direct contact with the insulation cavity during sample handling and placement. The conveying tray separates the interior of the moisture treatment cavity, ensuring that air entering the cavity during sample placement is replaced by low-temperature nitrogen supplied by the defrosting component, thus expelling the air. During handling, the sample is directly removed from the insulation cavity by fixed grippers and then transported to the outside. Throughout the process, the nitrogen inside the insulation cavity does not exchange with the air, thereby maintaining a low-temperature environment within the cavity and preventing cold loss, thus ensuring the low-temperature condition of the sample. This invention facilitates the removal of frost from the sample surface by combining a conveying component and a defrosting component. Nitrogen gas is sprayed onto the sample through a nitrogen nozzle, and air carrying frost crystals is drawn outward from the bottom of the baffle through a nitrogen output pipe. This process uses low-temperature nitrogen gas to flush the sample and remove the frost from its surface, thus ensuring that the sample remains frost-free when it enters the insulation chamber. This invention, through the coordination of output components and interfaces, facilitates the reduction of sample contact time with air. The sample is clamped by adjustment frame one and adjustment frame two, so that the sample remains parallel to the interface when it is pushed out. Then, the sample is pushed from the interface into the clamping position of the impact testing machine by the second telescopic rod, so as to achieve rapid sample loading and avoid excessive temperature changes that affect the accuracy of the experiment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the top cross-sectional structure of the present invention; Figure 2 This is a cross-sectional view of the middle part of the thermal insulation component of the present invention; Figure 3 This is a schematic diagram showing the overall disassembly of the conveying component of the present invention; Figure 4 This is a partial detail view of the delivery component of the present invention; Figure 5 This is a detailed cross-sectional view of the defrosting component of the present invention; Figure 6 This is a schematic diagram of the overall output component of the present invention; Figure 7 This is an enlarged schematic diagram of the fixing claw of the present invention; Figure 8 This is an enlarged schematic diagram of the connection between the fixed gripper and the conveying channel of the present invention; Figure 9 This is a schematic diagram of the overall configuration of the first and second adjustment frames of the present invention. Figure 10 This is a schematic diagram of the overall structure of the present invention.

[0017] In the picture: 1. Main casing; 2. Display screen; 3. Thermal insulation components; 31. Thermal insulation shell; 32. Moisture treatment chamber; 33. Thermal insulation chamber; 34. Vacuum insulation chamber; 4. Conveying assembly; 41. Conveying disc; 42. Gear groove; 43. Placement slot one; 44. Stop bar; 45. Conveying channel; 46. Transmission gear set; 47. First motor; 5. Support assembly; 51. Support plate; 52. Placement slot two; 53. Second motor; 6. Defrosting assembly; 61. Suction equipment; 62. Nitrogen inlet pipe; 63. Nitrogen nozzle; 64. Nitrogen outlet pipe; 7. Output component; 71. First guide rail; 72. Second guide rail; 73. Fixed gripper; 74. Conveyor tray; 75. Movable gripper; 76. First telescopic rod; 77. Adjustment frame one; 78. Adjustment frame two; 79. Second telescopic rod; 8. Interface. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 10 As shown, the present invention provides a titanium plate stress detection device and its detection method, including a main body shell 1, a display screen 2 mounted on the top of the main body shell 1, a connection interface 8 provided on one side of the main body shell 1, and a heat insulation component 3 installed inside the main body shell 1, and further including: The conveying component 4 is located on the upper side inside the insulation component 3 and is used to convey the sample. Support component 5, which is installed inside insulation component 3, is used to keep the sample warm; The defrosting assembly 6 is located on the side of the insulation assembly 3 and is used to defrost the sample. Output component 7, which is installed inside the main housing 1, is used to transport the sample into the impact testing machine; Among them, the conveying component 4 includes a conveying plate 41 rotatably connected inside the heat preservation component 3. The conveying plate 41 has three placement slots 43 arranged in a ring in the middle. A pair of baffles 44 are fixedly connected inside the placement slots 43. The support assembly 5 includes a support plate 51 rotatably connected inside the insulation assembly 3. A second motor 53 is driven to the top of the support plate 51. Multiple placement slots 52 are arranged in a ring on the lower side of the support plate 51.

[0020] like Figure 2 and Figure 3 As shown, the heat insulation component 3 includes a heat insulation shell 31 fixedly connected inside the main body shell 1. The heat insulation shell 31 has a moisture treatment chamber 32 and a heat insulation chamber 33 inside. Vacuum heat insulation chambers 34 are provided on the outer side and the lower side of the heat insulation shell 31. The heat insulation chamber 33 is connected to the liquid nitrogen tank through pipes and conveying equipment. The conveyor plate 41 is located inside the moisture treatment chamber 32, the support plate 51 is located inside the heat insulation chamber 33 and the middle of the support plate 51 penetrates the heat insulation shell 31 and extends to the top of the main body shell 1. The second motor 53 is fixedly connected to the top of the heat insulation shell 31.

[0021] By adopting the above solution, by placing the conveyor plate 41 inside the moisture treatment chamber 32, the sample can be prevented from being directly conveyed into the insulation chamber 33, thereby isolating external air and moisture and ensuring the insulation effect inside the insulation chamber 33.

[0022] like Figure 3 and Figure 4 As shown, the conveying assembly 4 also includes a conveying channel 45 that penetrates the top of the heat insulation housing 31, and the conveying channel 45 connects the moisture treatment chamber 32 and the heat insulation chamber 33. The outer side of the conveying disk 41 is provided with a toothed groove 42, and the lower side of the conveying disk 41 is provided with an opening corresponding to the toothed groove 42. The outer side of the conveying disk 41 is provided with a transmission gear set 46 that meshes with the placement groove 43, and the lower side of the transmission gear set 46 is provided with a first motor 47 for driving the transmission gear set 46.

[0023] The above scheme is adopted: by setting the conveying channel 45, it is convenient to place the sample into the second motor 53 on the upper side of the support plate 51 to keep the sample warm. The setting of the toothed groove 42, the transmission gear set 46 and the first motor 47 is convenient to control the rotation of the conveying plate 41, thereby controlling the movement of the conveying plate 41 carrying the sample, and thus driving the sample to move past the defrosting component 6. At the same time, the conveying plate 41 divides the cavity inside the moisture treatment chamber 32 into three parts, preventing outside air from completely entering when the sample is placed.

[0024] like Figure 5 As shown, the defrosting assembly 6 includes a suction device 61 fixedly connected to the main body shell 1. A nitrogen input pipe 62 is provided at the upper end of the suction device 61. A nitrogen nozzle 63 is fixedly connected to one end of the nitrogen input pipe 62. A nitrogen output pipe 64 is fixedly connected to the lower side of the suction device 61. A nitrogen tank is connected to the nitrogen inlet pipe 62. The bottom of the nitrogen nozzle 63 and one end of the nitrogen outlet pipe 64 are connected to the moisture treatment chamber 32. When the placement tank 43 moves to be perpendicular to the nitrogen nozzle 63, the nitrogen nozzle 63 and the placement tank 43 form a sealed cavity inside the moisture treatment chamber 32. The nitrogen outlet pipe 64, together with the nitrogen nozzle 63 and the placement tank 43, forms a unidirectional flow nitrogen circuit.

[0025] The above scheme is adopted: by setting up a defrosting component 6, nitrogen gas is sprayed into the placement tank 43 through the nitrogen nozzle 63 and drawn out through the nitrogen output pipe 64, thereby rinsing the sample to remove the frost on the sample surface and drawing it out through the nitrogen output pipe 64. At the same time, when the placement tank 43 and the nitrogen nozzle 63 are staggered, the air entering the moisture treatment chamber 32 is discharged.

[0026] like Figures 6 to 10 As shown, the output component 7 includes a first guide rail 71 and a second guide rail 72 located on the upper side of the heat insulation shell 31 and fixedly connected to the main shell 1. A fixed gripper 73 is installed on the upper end of the first guide rail 71, and a conveying tray 74 is installed in the middle of the second guide rail 72. A movable gripper 75 fixedly connected to the main shell 1 is provided on the upper side of one end of the second guide rail 72. The fixed gripper 73 can move along the first guide rail 71 into the heat insulation cavity 33, and the conveying tray 74 can move along the second guide rail 72 under the fixed gripper 73 and the movable gripper 75.

[0027] The above solution facilitates sample transport by fixing the gripper 73. The defrosted sample can be placed inside the second motor 53. When the sample needs to be removed, the gripper can be inserted into the insulation chamber 33 through the transport channel 45 to remove the sample from the second motor 53. This avoids the problem of the traditional insulation box opening when the sample needs to be removed, which causes the low-temperature nitrogen inside the insulation box to flow out, resulting in the loss of cold air inside the insulation box and the entry of hot air from the outside, affecting the temperature inside the insulation box. The sample taken out by the fixed gripper 73 is transported by the conveyor tray 74 and the movable gripper 75 to ensure the stability of the sample state.

[0028] like Figures 6 to 10 As shown, a first telescopic rod 76 and an adjustment frame 78 are installed on the side of the main body shell 1. The output end of the first telescopic rod 76 is fixedly connected to the adjustment frame 77. A second telescopic rod 79 is fixedly connected to the main body shell 1 on one side of the adjustment frame 78. The first adjustment frame 77 is located under the movable gripper 75. The first adjustment frame 77 and the second adjustment frame 78 are inserted into each other. The output end of the second telescopic rod 79 faces the interface 8 and passes through the inside of the interface 8.

[0029] The above scheme is adopted: by setting the adjustment frame 1 77 and the adjustment frame 2 78, the sample can be clamped by the adjustment frame 1 77 and the adjustment frame 2 78, so that the sample can be kept parallel to the interface 8 when it is pushed out, so as to complete the adjustment of the sample position, avoid the sample being stuck when it is pushed into the impact testing machine by the second telescopic rod 79, ensure the stability of the sample during transportation, and avoid the sample being bumped and subjected to additional stress.

[0030] A method for stress testing of titanium plates includes the following steps: S1. After cleaning the titanium plate, perform a cooling operation; First stage: The titanium plate sample is pre-cooled from 0°C to -80°C by using dry ice sublimation cooling to -78.5°C or a compressed air refrigeration machine to generate low-temperature gas. Second stage: The titanium plate sample is cooled to -110℃ using an alcohol + dry ice mixed bath or cryogenically cooled to -150℃ using a special low-temperature silicone oil bath. Third stage: Suspend the titanium plate 10-15cm above the liquid nitrogen tank and slowly cool it down for 10 minutes using the evaporated cold nitrogen gas. Fourth stage: The pre-cooled sample is gradually immersed in liquid nitrogen in three stages, increasing the immersion depth by 25% → 50% → 100%, with a 2-minute interval between each immersion. S2. Move the titanium plate into the insulation box for insulation, and then move it to the impact testing machine and adjust the impact testing machine. S3. Align the interface 8 of the insulated box with the clamp of the impact tester sample, and transport the sample into the impact tester to complete the impact test.

[0031] Working principle and usage process of this invention: When using heat preservation, the cooled sample is placed into the placement slot 43 inside the moisture treatment chamber 32 from the inlet at the top of the main shell 1. At this time, the first motor 47 drives the conveyor plate 41 to rotate through the transmission gear set 46 and the tooth groove 42. The conveyor plate 41 carries the sample to the lower side of the nitrogen nozzle 63. At this time, the suction device 61 extracts nitrogen from the liquid nitrogen tank and transports it into the nitrogen nozzle 63. Then, the nitrogen is sprayed into the placement slot 43 through the nitrogen nozzle 63 to flush the sample and remove the frost from the sample surface. Then the conveyor plate 41 continues to carry the sample and moves it to the lower side of the fixed clamp 73. The first guide rail 71 drives the fixed gripper 73 to move downward, grips the sample, and moves the sample upward to move it out of the placement slot 43. Then the conveyor plate 41 continues to rotate. When the placement slot 43 moves away from the bottom of the fixed gripper 73, the first guide rail 71 will drive the fixed gripper 73 to move downward, so that the fixed gripper 73 enters the heat preservation cavity 33 and moves to the upper side of the support plate 51. The sample is placed inside the second motor 53 on the upper side of the support plate 51. Then the fixed gripper 73 is reset, and the placement slot 52 drives the support plate 51 to rotate, rotating the free second motor 53 to the lower side of the conveying channel 45. When the sample needs to be output, the main body shell 1 is moved to the front of the impact testing machine by the external trolley, and the interface 8 is aligned with the sample placement channel. The first motor 47 drives the conveyor plate 41 to rotate, so that the placement slot 1 43 is misaligned with the conveyor channel 45. At the same time, the placement slot 2 52 drives the support plate 51 to rotate, moving the sample to the lower side of the conveyor channel 45. Then, the first guide rail 71 drives the fixed gripper 73 to move downward, so that the fixed gripper 73 clamps the sample and carries the sample to the top of the heat insulation shell 31. Then, the conveyor tray 74 moves along the second guide rail 72 to the top of the heat insulation shell 31. The sample held by the fixed gripper 73 is received on the underside of the fixed gripper 73. The sample is then moved to the underside of the movable gripper 75, where the movable gripper 75 clamps the sample. At the same time, the transport tray 74 moves and resets. Then, the movable gripper 75 moves downward to place the sample on the first adjustment frame 77. The first telescopic rod 76 then pushes the first adjustment frame 77 to the second adjustment frame 78, and the first adjustment frame 77 and the second adjustment frame 78 clamp the sample, thus completing the positioning of the sample. Finally, the second telescopic rod 79 pushes the sample from the interface 8 into the impact testing machine, thus completing the transport of the sample.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A titanium plate stress detection device, comprising a main body shell (1), a display screen (2) mounted on the top of the main body shell (1), a connection interface (8) provided on one side of the main body shell (1), and a heat insulation component (3) installed inside the main body shell (1), characterized in that, Also includes: The conveying assembly (4) is located on the upper side inside the insulation assembly (3) and is used to convey the sample. Support component (5), which is installed inside the insulation component (3), is used to keep the sample warm; The defrosting assembly (6) is located on the side of the insulation assembly (3) and is used to defrost the sample; Output component (7), which is installed inside the main body housing (1), is used to transport the sample into the impact testing machine; The conveying assembly (4) includes a conveying disc (41) rotatably connected inside the insulation assembly (3). The conveying disc (41) has three placement slots (43) arranged in a ring in the middle. A pair of baffles (44) are fixedly connected inside the placement slots (43). The support assembly (5) includes a support disk (51) rotatably connected inside the insulation assembly (3), a second motor (53) is connected to the top of the support disk (51), and multiple placement slots (52) are arranged in a ring on the lower side of the support disk (51).

2. The titanium plate stress detection device according to claim 1, characterized in that: The heat insulation component (3) includes a heat insulation shell (31) fixedly connected inside the main body shell (1). The heat insulation shell (31) has a moisture treatment chamber (32) and a heat insulation chamber (33) inside. The heat insulation shell (31) has a vacuum heat insulation chamber (34) on the outside and the bottom. The heat insulation chamber (33) is connected to the liquid nitrogen tank through pipes and conveying equipment.

3. The titanium plate stress detection device according to claim 1, characterized in that: The conveyor plate (41) is located inside the moisture treatment chamber (32), the support plate (51) is located inside the heat insulation chamber (33) and the middle part of the support plate (51) penetrates the heat insulation shell (31) and extends to the top of the main body shell (1). The second motor (53) is fixedly connected to the top of the heat insulation shell (31).

4. The titanium plate stress detection device according to claim 1, characterized in that: The conveying assembly (4) also includes a conveying channel (45) that passes through the top of the heat insulation shell (31), and the conveying channel (45) connects the moisture treatment chamber (32) and the heat insulation chamber (33). The outer side of the conveying plate (41) is provided with a toothed groove (42), and the lower side of the conveying plate (41) is provided with an opening corresponding to the placement groove (43). The outer side of the conveying plate (41) is provided with a transmission gear set (46) that meshes with the toothed groove (42), and the lower side of the transmission gear set (46) is provided with a first motor (47) for driving the transmission gear set (46).

5. The titanium plate stress detection device according to claim 1, characterized in that: The defrosting assembly (6) includes a suction device (61) fixedly connected to the main body shell (1). A nitrogen input pipe (62) is provided at the upper end of the suction device (61), a nitrogen nozzle (63) is fixedly connected at one end of the nitrogen input pipe (62), and a nitrogen output pipe (64) is fixedly connected at the lower side of the suction device (61).

6. The titanium plate stress detection device according to claim 5, characterized in that: The nitrogen input pipe (62) is connected to a nitrogen tank. The bottom of the nitrogen nozzle (63) and one end of the nitrogen output pipe (64) are connected to the moisture treatment chamber (32). When the placement slot (43) moves to be perpendicular to the nitrogen nozzle (63), the nitrogen nozzle (63) and the placement slot (43) form a sealed cavity inside the moisture treatment chamber (32). The nitrogen output pipe (64) cooperates with the nitrogen nozzle (63) and the placement slot (43) to form a unidirectional flow nitrogen circuit.

7. The titanium plate stress detection device according to claim 1, characterized in that: The output component (7) includes a first guide rail (71) and a second guide rail (72) located on the upper side of the heat insulation shell (31) and fixedly connected to the main shell (1). A fixed gripper (73) is installed on the upper end of the first guide rail (71), and a conveying tray (74) is installed in the middle of the second guide rail (72). A movable gripper (75) fixedly connected to the main shell (1) is provided on the upper side of one end of the second guide rail (72). The fixed gripper (73) can move along the first guide rail (71) to the inside of the heat insulation cavity (33), and the conveying tray (74) can move along the second guide rail (72) under the fixed gripper (73) and the movable gripper (75).

8. The titanium plate stress detection device according to claim 7, characterized in that: The main body shell (1) is equipped with a first telescopic rod (76) and a second adjustment frame (78) on its side. The output end of the first telescopic rod (76) is fixedly connected to the first adjustment frame (77), and the second adjustment frame (78) is provided with a second telescopic rod (79) fixedly connected to the main body shell (1) on one side.

9. The titanium plate stress detection device according to claim 8, characterized in that: The first adjustment frame (77) is located below the movable gripper (75). The first adjustment frame (77) and the second adjustment frame (78) are plugged into each other. The output end of the second telescopic rod (79) faces the interface (8) and passes through the inside of the interface (8).

10. A method for detecting stress in titanium plates, applied to the titanium plate stress detection device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. After cleaning the titanium plate, perform a cooling operation; First stage: The titanium plate sample is pre-cooled from 0°C to -80°C by using dry ice sublimation cooling to -78.5°C or a compressed air refrigeration machine to generate low-temperature gas. Second stage: The titanium plate sample is cooled to -110℃ using an alcohol + dry ice mixed bath or cryogenically cooled to -150℃ using a special low-temperature silicone oil bath. Third stage: Suspend the titanium plate 10-15cm above the liquid nitrogen tank and slowly cool it down for 10 minutes using the evaporated cold nitrogen gas. Fourth stage: The pre-cooled sample is gradually immersed in liquid nitrogen in three stages, increasing the immersion depth by 25% → 50% → 100%, with a 2-minute interval between each immersion. S2. Move the titanium plate into the insulation box for insulation, and then move it to the impact testing machine and adjust the impact testing machine. S3. Align the interface (8) of the insulation box with the clamp of the impact tester sample, transport the sample into the impact tester, and complete the impact test.

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