Titanium plate stress detection device and detection method thereof

Abstract

The application 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 is installed on the top of the main body shell, a docking port is arranged on one side of the main body shell, a heat preservation assembly is installed in the main body shell, and the device further comprises a conveying assembly arranged on the upper side of the heat preservation assembly and used for conveying a sample; the conveying assembly and an output assembly are matched to isolate the external air from the heat preservation cavity and prevent the external air from directly contacting the heat preservation cavity when the sample is taken and placed, the internal part of a moisture treatment cavity is separated by a conveying disc, the air entering the moisture treatment cavity when the sample is placed is replaced by low-temperature nitrogen gas conveyed by a defrosting assembly and discharged, the sample is directly taken out from the internal part of the heat preservation cavity by a fixed clamping jaw when the sample is taken, and then the sample is conveyed to the outside, and the nitrogen gas in the internal part of the heat preservation cavity is not exchanged with the air.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of titanium plate detection, and particularly relates to a titanium plate stress detection device and a detection method thereof. BACKGROUND

[0002] Titanium plates used in spacecraft and liquefied natural gas need to be able to withstand sufficient low temperature and have sufficient resistance under low temperature conditions, mainly to detect the stability of the performance of the titanium plates under extreme low temperature environment, to perform low temperature impact testing on the titanium plates, to correct stress safety factors through impact data, to reversely verify the harmfulness of the welding residual stress through the impact testing, and to perform fracture scanning and stress distribution simulation on the titanium plates fractured under low temperature to trace the root cause of failure. Before the impact testing is performed on the titanium plates, low temperature treatment needs to be performed on the titanium plates to simulate the environmental state of the spacecraft and the liquefied natural gas. When the low temperature is performed on the titanium plates, multi-stage precooling treatment needs to be performed, and the whole process lasts for 45 to 90 minutes. Therefore, in order to ensure work efficiency, multiple samples need to be collectively treated.

[0003] After the precooling of the titanium plate sample is completed, liquid nitrogen needs to be soaked to complete the low temperature treatment. However, the titanium plate sample cannot be soaked in liquid nitrogen for a long time. Therefore, a heat preservation box needs to be used for heat preservation. However, the existing heat preservation box needs to be manually placed into the heat preservation box and taken out from the heat preservation box during installation. This process needs to open and close the heat preservation box multiple times, which affects the heat preservation effect and may introduce moisture and frost, affecting the heat preservation effect. In addition, the time for manually installing the sample causes the temperature of the sample to rise, affecting the accuracy of the final test. Therefore, the titanium plate stress detection device and the detection method thereof are provided. SUMMARY

[0004] To solve the problems in the background art, the application provides a titanium plate stress detection device and a detection method thereof.

[0005] To achieve the above-mentioned purposes, the application provides the following technical scheme: a titanium plate stress detection device, comprising a main body shell, a display screen is installed on the top of the main body shell, a docking port is arranged on one side of the main body shell, a heat preservation assembly is installed inside the main body shell, and the device further comprises:

[0006] A conveying assembly is arranged on the upper side inside the heat preservation assembly and is used for conveying the sample;

[0007] A supporting assembly is installed inside the heat preservation assembly and is used for heat preservation of the sample;

[0008] A defrosting assembly is arranged on the side of the heat preservation assembly and is used for defrosting the sample;

[0009] An output assembly is installed inside the main body shell for conveying the sample into the impact testing machine;

[0010] The conveying assembly comprises a conveying disc rotatably connected inside the heat preservation assembly, and three placing grooves are arranged in the middle of the conveying disc in a ring shape.

[0011] The supporting assembly comprises a supporting disc rotatably connected inside the heat preservation assembly, and a second motor is drivingly connected to the top of the supporting disc.

[0012] Preferably, the heat preservation assembly comprises an insulation shell fixedly connected inside the main body shell, and a moisture treatment cavity and a heat preservation cavity are arranged inside the insulation shell.

[0013] Preferably, the conveying disc is located inside the moisture treatment cavity, the supporting disc is located inside the heat preservation cavity and penetrates through the insulation shell to extend to the top of the main body shell, and the second motor is fixedly connected to the top of the insulation shell.

[0014] Preferably, the conveying assembly further comprises a conveying channel penetrating through the top of the insulation shell, and the conveying channel connects the moisture treatment cavity and the heat preservation cavity, the conveying disc is provided with a gear slot outside, and an opening is arranged in the corresponding position of the conveying disc.

[0015] Preferably, the defrosting assembly comprises a suction device fixedly connected to the main body shell, and the suction device is provided with a nitrogen input pipe at the upper end.

[0016] Preferably, the nitrogen input pipe is externally connected to a nitrogen tank, the bottom of the nitrogen spout and one end of the nitrogen output pipe are both connected to the moisture treatment cavity, and when the placing groove is moved to be perpendicular to the nitrogen spout, the nitrogen spout and the placing groove form a sealed cavity inside the moisture treatment cavity, and the nitrogen output pipe cooperates with the nitrogen spout and the placing groove to form a one-way nitrogen circulation loop.

[0017] Preferably, the output assembly comprises a first guide rail and a second guide rail fixedly connected to the upper side of the heat insulation shell, a fixed clamp is arranged at the upper end of the first guide rail, a conveying tray is arranged at the middle part of the second guide rail, and a movable clamp fixedly connected to the main body shell is arranged on the upper side of one end of the second guide rail; the fixed clamp can move to the inside of the heat preservation cavity along the first guide rail, and the conveying tray can move under the fixed clamp and the movable clamp along the second guide rail.

[0018] Preferably, the first telescopic rod and the second telescopic rod are arranged on the side of the main body shell, the output end of the first telescopic rod is fixedly connected with the first position adjusting frame, and the second telescopic rod is arranged on one side of the second position adjusting frame and fixedly connected with the main body shell.

[0019] Preferably, the first position adjusting frame is arranged below the movable clamp, the first position adjusting frame is inserted with the second position adjusting frame, and the output end of the second telescopic rod faces the docking port and passes through the inside of the docking port.

[0020] A titanium plate stress detection method, comprising the following steps:

[0021] S1, after the titanium plate is cleaned, cooling operation is performed;

[0022] The first stage: through dry ice sublimation cooling-78.5℃ or compressed air refrigeration machine, low temperature gas is generated to precool the titanium plate sample, and the temperature is reduced from 0℃ to-80℃;

[0023] The second stage: the alcohol+dry ice mixed bath is used for secondary cooling of the titanium plate sample to-110℃ or the special low-temperature silicon oil bath is used for deep cooling of the titanium plate sample to-150℃.

[0024] The third stage: the titanium plate is suspended above the liquid nitrogen tank at a distance of 10-15cm, and the evaporated cold nitrogen gas is used for slow cooling for 10 minutes;

[0025] The fourth stage: the pre-cooled sample is gradiently immersed into the liquid nitrogen, and the immersion depth of the liquid nitrogen is increased by 25%→50%→100% in three times, and each time interval is 2 minutes.

[0026] S2, the titanium plate is moved into the heat preservation box for heat preservation, and is moved to the impact detection machine, and the impact detection machine is debugged.

[0027] S3, the docking port of the heat preservation box is aligned with the clamp of the sample of the impact detection machine, the sample is conveyed into the impact detection machine, and the impact test is completed.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows:

[0029] The application cooperates the structures of the conveying assembly and the output assembly, so that the external air is isolated from the heat preservation cavity and does not directly contact with the heat preservation cavity when the sample is taken and placed, the inside of the humidity treatment cavity is separated by the conveying disc, the air entering the humidity treatment cavity is replaced by the low-temperature nitrogen gas conveyed by the defrosting assembly and is discharged when passing through the defrosting assembly when the sample is placed, the sample is directly taken out from the inside of the heat preservation cavity by the fixed clamping jaw and is conveyed to the outside when the sample is taken, the nitrogen gas in the heat preservation cavity is not exchanged with the air, so that the low-temperature state of the heat preservation cavity is ensured, the cold energy loss is avoided, and the low-temperature state of the sample is ensured.

[0030] The application cooperates the structures of the conveying assembly and the defrosting assembly, so that the frost on the surface of the sample is cleaned, the nitrogen gas is sprayed to the sample through the nitrogen gas spraying port, and the air carrying the frost crystals is sucked and carried out from the bottom of the blocking rod by the nitrogen gas output pipe, so that the sample is flushed by the low-temperature nitrogen gas to clean the frost on the surface of the sample, so that the sample is ensured to keep the surface without frost when entering the inside of the heat preservation cavity.

[0031] The application cooperates the structures of the output assembly and the docking port, so that the contact time of the sample and the air is reduced, the sample is clamped by the adjusting frame one and the adjusting frame two, the sample can keep parallel with the docking port when being pushed out, and then the sample is pushed into the clamp position of the impact detection machine from the docking port by the second telescopic rod, so that the sample is quickly fed, the temperature change is avoided to be too large, and the accuracy of the experiment is avoided to be affected. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a top sectional view structure schematic diagram of the application;

[0033] Figure 2 It is a middle sectional view of the heat preservation assembly of the application;

[0034] Figure 3 It is an overall split schematic diagram of the conveying assembly of the application;

[0035] Figure 4 It is a local detail view of the conveying assembly of the application;

[0036] Figure 5 It is a defrosting assembly sectional detail view of the application;

[0037] Figure 6 It is an overall schematic diagram of the output assembly of the application;

[0038] Figure 7 It is an enlarged schematic diagram of the fixed clamping jaw of the application;

[0039] Figure 8 It is an enlarged schematic diagram of the fixed clamping jaw and the conveying channel connection of the application;

[0040] Figure 9 This is a schematic diagram of the overall configuration of the first and second adjustment frames of the present invention.

[0041] Figure 10 This is a schematic diagram of the overall structure of the present invention.

[0042] In the picture:

[0043] 1. Main casing; 2. Display screen;

[0044] 3. Thermal insulation components; 31. Thermal insulation shell; 32. Moisture treatment chamber; 33. Thermal insulation chamber; 34. Vacuum insulation chamber;

[0045] 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;

[0046] 5. Support assembly; 51. Support plate; 52. Placement slot two; 53. Second motor;

[0047] 6. Defrosting assembly; 61. Suction equipment; 62. Nitrogen inlet pipe; 63. Nitrogen nozzle; 64. Nitrogen outlet pipe;

[0048] 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

[0049] 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.

[0050] 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:

[0051] The conveying component 4 is located on the upper side inside the insulation component 3 and is used to convey the sample.

[0052] Support component 5, which is installed inside insulation component 3, is used to keep the sample warm;

[0053] A defrosting assembly 6 is arranged at the side of the heat preservation assembly 3, and is used for defrosting the sample;

[0054] An output assembly 7 is arranged in the inner part of the main body shell 1, and is used for conveying the sample into the impact testing machine;

[0055] The conveying assembly 4 comprises a conveying disc 41 rotatably connected in the heat preservation assembly 3, and three placing grooves 43 are arranged in the middle part of the conveying disc 41 in a ring shape, and a pair of blocking rods 44 are fixedly connected in the inner part of the placing grooves 43.

[0056] The supporting assembly 5 comprises a supporting disc 51 rotatably connected in the heat preservation assembly 3, and the second motor 53 is drivingly connected to the top part of the supporting disc 51, and a plurality of placing grooves 52 are arranged in the lower side of the supporting disc 51 in a ring shape.

[0057] As shown in Figure 2 and Figure 3 , the heat preservation assembly 3 comprises an insulation shell 31 fixedly connected in the inner part of the main body shell 1, and the insulation shell 31 is provided with a moisture treatment cavity 32 and a heat preservation cavity 33 in the inner part, and the outer side and the lower side of the insulation shell 31 are provided with a vacuum insulation cavity 34, and the heat preservation cavity 33 is connected in communication with the liquid nitrogen tank through a pipeline and conveying equipment;

[0058] The conveying disc 41 is arranged in the inner part of the moisture treatment cavity 32, the supporting disc 51 is arranged in the heat preservation cavity 33, and the middle part of the supporting disc 51 penetrates through the insulation shell 31 and extends to the top part of the main body shell 1, and the second motor 53 is fixedly connected to the top part of the insulation shell 31.

[0059] By arranging the conveying disc 41 in the inner part of the moisture treatment cavity 32, the sample can be prevented from being directly conveyed into the heat preservation cavity 33, so as to isolate the external air and moisture, and ensure the heat preservation effect in the inner part of the heat preservation cavity 33.

[0060] As shown in Figure 3 and Figure 4 , the conveying assembly 4 further comprises a conveying channel 45 penetrating through the top part of the insulation shell 31, and the conveying channel 45 connects the moisture treatment cavity 32 and the heat preservation cavity 33 in communication, the outer side of the conveying disc 41 is provided with a gear slot 42, the lower side of the conveying disc 41 is provided with an opening at the position corresponding to the gear slot 42, the outer side of the conveying disc 41 is provided with a transmission gear set 46 meshingly connected with the gear slot 42, and the lower side of the transmission gear set 46 is provided with the first motor 47 used for driving the transmission gear set 46.

[0061] By means of the above scheme: by setting the conveying channel 45, the sample can be conveniently placed into the placing groove two 52 on the upper side of the support disc 51, so as to conveniently preserve the sample, and by setting the gear slot 42, the transmission gear set 46 and the first motor 47, the rotation of the conveying disc 41 can be controlled, so as to control the movement of the conveying disc 41 carrying the sample, and in turn drive the sample to move through the defrosting assembly 6, and meanwhile the conveying disc 41 divides the cavity inside the moisture treatment cavity 32 into three parts, avoiding that the external air completely enters when the sample is placed.

[0062] As shown in Figure 5 , the defrosting assembly 6 comprises a suction device 61 fixedly connected with the main body shell 1, the suction device 61 is provided with a nitrogen input pipe 62 at the upper end, one end of the nitrogen input pipe 62 is fixedly connected with a nitrogen spout 63, and the lower side of the suction device 61 is fixedly connected with a nitrogen output pipe 64;

[0063] The nitrogen input pipe 62 is externally connected with a nitrogen tank, the bottom of the nitrogen spout 63 and one end of the nitrogen output pipe 64 are both in communication with the moisture treatment cavity 32, when the placing groove one 43 moves to be perpendicular to the nitrogen spout 63, at this time, the nitrogen spout 63 and the placing groove one 43 form a sealed cavity inside the moisture treatment cavity 32, and the nitrogen output pipe 64 cooperates with the nitrogen spout 63 and the placing groove one 43 to form a one-way nitrogen circulation loop.

[0064] By means of the above scheme: by setting the defrosting assembly 6, nitrogen is sprayed into the placing groove one 43 from the nitrogen spout 63, and is sucked outwards from the nitrogen output pipe 64, so as to flush the sample, remove the frost on the surface of the sample, and at the same time, the nitrogen spout 63 discharges the air entering the moisture treatment cavity 32 when the placing groove one 43 is staggered with the nitrogen spout 63.

[0065] As shown in Figures 6 to 10 , the output assembly 7 comprises 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 with the main body shell 1, the first guide rail 71 is installed with a fixed jaw 73 at the upper end, the second guide rail 72 is installed with a conveying tray 74 at the middle, and the second guide rail 72 is provided with a movable jaw 75 fixedly connected with the main body shell 1 at one end and on the upper side, the fixed jaw 73 can move into the heat preservation cavity 33 along the first guide rail 71, and the conveying tray 74 can move below the fixed jaw 73 and the movable jaw 75 along the second guide rail 72.

[0066] Adopt the above scheme: through the setting of the fixed jaw 73, it can be convenient for the sample to be transported, and the sample after defrosting can be placed in the placing groove two 52, and when the sample needs to be taken out, the placing groove two 52 is inserted into the heat preservation cavity 33 from the conveying channel 45, so that the sample in the placing groove two 52 is clamped out, thereby avoiding the opening of the traditional heat preservation box when the sample needs to be taken out, causing the low-temperature nitrogen gas in the heat preservation box to flow out, causing the cold gas in the heat preservation box to be lost, and the external hot air to enter, affecting the temperature in the heat preservation box;

[0067] Through the conveying tray 74 and the movable clamping jaw 75, the sample taken out by the fixed clamping jaw 73 can be conveyed, and the stability of the sample state is ensured.

[0068] As shown in Figures 6 to 10 The first extension rod 76 is fixedly connected with the positioning frame one 77 at the output end, and the second extension rod 79 is fixedly connected with the positioning frame two 78 on one side;

[0069] The positioning frame one 77 is located below the movable clamping jaw 75, the positioning frame one 77 and the positioning frame two 78 are inserted with each other, and the output end of the second extension rod 79 faces the docking port 8 and passes through the inside of the docking port 8.

[0070] Adopt the above scheme: through the setting of the positioning frame one 77 and the positioning frame two 78, the sample can be clamped by the positioning frame one 77 and the positioning frame two 78, so that the sample can be kept in parallel with the docking port 8 when being pushed out, to complete the adjustment of the position of the sample, avoid being stuck when the sample is pushed into the impact detection machine by the second extension rod 79, ensure the stability of the sample during conveying, and avoid the sample being bumped and additional stress being applied.

[0071] A titanium plate stress detection method, comprising the following steps:

[0072] S1, after the titanium plate is cleaned, the temperature is lowered;

[0073] The first stage: through dry ice sublimation cooling-78.5℃ or compressed air refrigeration machine, low-temperature gas is generated to pre-cool the titanium plate sample from 0℃ to-80℃;

[0074] The second stage: the alcohol+dry ice mixed bath is used to reduce the temperature of the titanium plate sample to-110℃ or the special low-temperature silicon oil bath is used to reduce the temperature of the titanium plate sample to-150℃

[0075] The third stage: the titanium plate is suspended above the liquid nitrogen tank at a distance of 10-15 cm, and the evaporated cold nitrogen gas is used to slowly cool for 10 minutes;

[0076] The fourth stage: the sample is gradiently soaked into the liquid nitrogen, and the immersion depth of the liquid nitrogen is increased by 25% to 50% to 100% in three steps, and each step interval is 2 minutes;

[0077] S2, the titanium plate is moved to the heat preservation box, and the impact detection machine is debugged;

[0078] S3, the heat preservation box is aligned with the impact detection machine sample clamp, and the sample is transported into the impact detection machine, and the impact test is completed.

[0079] The working principle and use process of the application are as follows:

[0080] When using heat preservation, the cooled sample is placed in the placing groove one 43 inside the moisture treatment cavity 32 from the entrance at the top of the main body shell 1, at this time the first motor 47 drives the conveying disc 41 to rotate through the transmission gear set 46 and the tooth groove 42, and the conveying disc 41 carries the sample to move to the lower side of the nitrogen jet 63, at this time the suction device 61 sucks the nitrogen from the inside of the liquid nitrogen tank and sends it into the nitrogen jet 63, and then sprays into the placing groove one 43 to flush the sample, so as to remove the frost on the surface of the sample, and then the conveying disc 41 continues to carry the sample to move, so that the sample moves to the lower side of the fixed clamping jaw 73;

[0081] The fixed clamping jaw 73 is driven by the first guide rail 71 to move downward, the sample is clamped by the fixed clamping jaw 73, and the sample is moved upward to move out of the placing groove one 43, and then the conveying disc 41 continues to rotate, when the placing groove one 43 moves away from the bottom of the fixed clamping jaw 73, the first guide rail 71 drives the fixed clamping jaw 73 to move downward, so that the fixed clamping jaw 73 enters the heat preservation cavity 33 and moves to the upper side of the supporting disc 51, and the sample is placed in the placing groove two 52 on the upper side of the supporting disc 51, and then the fixed clamping jaw 73 is reset, and the second motor 53 drives the supporting disc 51 to rotate, so that the empty placing groove two 52 is rotated to the lower side of the conveying channel 45;

[0082] When the sample needs to be output, at this time the main body shell 1 is driven to the front of the impact testing machine by the external trolley, and the interface 8 is docked with the sample placing channel. The first motor 47 drives the conveying disc 41 to rotate, so that the placing groove one 43 is staggered with the conveying channel 45, and the second motor 53 drives the supporting disc 51 to rotate, so that the sample is moved to the lower side of the conveying channel 45. Then the first guide rail 71 drives the fixed clamping jaw 73 to move downward, so that the fixed clamping jaw 73 clamps the sample, and carries the sample to the top of the heat insulation shell 31. Then the conveying tray 74 moves to the lower side of the fixed clamping jaw 73 along the second guide rail 72, and receives the sample clamped by the fixed clamping jaw 73. Then the conveying tray 74 drives the sample to move to the lower side of the movable clamping jaw 75, and the movable clamping jaw 75 clamps the sample. At the same time, the conveying tray 74 moves back to the original position. Then the movable clamping jaw 75 moves downward and places the sample on the positioning rack one 77. Then the first telescopic rod 76 pushes the positioning rack one 77 to move to the positioning rack two 78, and the positioning rack one 77 and the positioning rack two 78 clamp the sample, so as to complete the positioning of the sample. Finally, the second telescopic rod 79 pushes the sample to move from the interface 8 to the inside of the impact testing machine, so as to complete the conveying of the sample.

[0083] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0084] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application 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) is installed on the top of the main body shell (1), a docking port (8) is arranged on one side of the main body shell (1), a heat preservation assembly (3) is installed in the main body shell (1), characterized in that, Also includes: The conveying assembly (4) is arranged in the upper side of the heat preservation assembly (3) inside, for sample conveying; Support assembly (5) is installed in the heat preservation assembly (3) inside, for sample heat preservation; Defrosting assembly (6) is arranged in the side of heat preservation assembly (3), for sample defrosting; Output assembly (7) is installed in the inside of main body shell (1), for conveying sample into the impact testing machine inside; Wherein, the conveying assembly (4) includes rotatingly connected in the heat preservation assembly (3) inside conveying disc (41), the middle part of conveying disc (41) is annularly distributed and is provided with three placing groove one (43), the inside of placing groove one (43) is fixedly connected with a pair of stop rod (44); The support assembly (5) includes rotatingly connected in the heat preservation assembly (3) inside support disc (51), the top of support disc (51) is transmissionly connected with second motor (53), the lower side of support disc (51) is annularly distributed and is provided with a plurality of placing groove two (52); The heat preservation assembly (3) includes fixedly connected in the inside of main body shell (1) heat insulation shell (31), the inside of heat insulation shell (31) is provided with humidity treatment cavity (32) and heat preservation cavity (33), the outside and the lower side of heat insulation shell (31) are provided with vacuum heat insulation cavity (34), the inside of heat preservation cavity (33) is communicated with liquid nitrogen tank through pipeline and conveying equipment; The conveying disc (41) is located in the inside of humidity treatment cavity (32), the support disc (51) is located in the inside of heat preservation cavity (33) and the middle part of support disc (51) extends to the top of main body shell (1) and penetrates heat insulation shell (31), the second motor (53) is fixedly connected in the top of heat insulation shell (31); The defrosting assembly (6) includes fixedly connected with main body shell (1) suction equipment (61), the upper end of suction equipment (61) is provided with nitrogen input pipe (62), one end of nitrogen input pipe (62) is fixedly connected with nitrogen spout (63), the lower side of suction equipment (61) is fixedly connected with nitrogen output pipe (64); The nitrogen input pipe (62) is connected with nitrogen tank, the bottom of nitrogen spout (63) and one end of nitrogen output pipe (64) are communicated with humidity treatment cavity (32), when the placing groove one (43) moves to be perpendicular to nitrogen spout (63), at this time, nitrogen spout (63) and placing groove one (43) form a sealed cavity in the inside of humidity treatment cavity (32), and nitrogen output pipe (64) and nitrogen spout (63) and placing groove one (43) cooperate to form a one-way flow nitrogen circuit.

2. The titanium plate stress detection device according to claim 1, characterized by: The conveying assembly (4) further comprises a conveying channel (45) penetrating through the top of the heat insulation shell (31), and the conveying channel (45) connects the moisture treatment cavity (32) and the heat preservation cavity (33), the outer side of the conveying disc (41) is provided with a gear slot (42), the lower side of the conveying disc (41) is provided with an opening at a position corresponding to the placing groove (43), the outer side of the conveying disc (41) is provided with a transmission gear set (46) engaged with the gear slot (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).

3. The titanium plate stress detection device according to claim 1, characterized by: The output assembly (7) comprises 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 with the main body shell (1), the upper end of the first guide rail (71) is provided with a fixed jaw (73), the middle part of the second guide rail (72) is provided with a conveying tray (74), and the upper side of one end of the second guide rail (72) is provided with a movable jaw (75) fixedly connected with the main body shell (1); the fixed jaw (73) can move along the first guide rail (71) to the inside of the heat preservation cavity (33), and the conveying tray (74) can move along the second guide rail (72) below the fixed jaw (73) and the movable jaw (75).

4. The titanium plate stress detection device according to claim 3, characterized by: The first telescopic rod (76) is fixedly connected with the positioning frame one (77) at the output end, and the positioning frame two (78) is provided with the second telescopic rod (79) fixedly connected with the main body shell (1) on one side.

5. The titanium plate stress detection device according to claim 4, characterized by: The positioning frame one (77) is located below the movable jaw (75), the positioning frame one (77) and the positioning frame two (78) are inserted with each other, and the output end of the second telescopic rod (79) faces the docking port (8) and passes through the inside of the docking port (8).

6. A method for detecting stress of a titanium plate, applied to the titanium plate stress detection device of any one of claims 1-5, characterized in that, The method comprises the following steps: S1, after the titanium plate is cleaned, the temperature is lowered; First stage: through dry ice sublimation cooling-78.5℃ or compressed air refrigeration machine, low-temperature gas is generated to pre-cool the titanium plate sample, and the temperature is lowered from 0℃ to-80℃; Second stage: the titanium plate sample is cooled to-110℃ by alcohol+dry ice mixed bath or the titanium plate sample is cooled to-150℃ by special low-temperature silicon oil bath; Third stage: the titanium plate is suspended 10-15cm above the liquid nitrogen tank, and the evaporated cold nitrogen gas is used to slowly cool for 10 minutes; Fourth stage: the pre-cooled sample is gradiently immersed into the liquid nitrogen, and the immersion depth of the liquid nitrogen is increased by 25%→50%→100% in three times, and each time interval is 2 minutes; S2, move the titanium plate to the inside of the heat preservation box, move to the impact detection machine, and debug the impact detection machine; S3, align the docking port (8) of the heat preservation box with the clamp of the impact detection machine sample, convey the sample to the inside of the impact detection machine, and complete the impact test.

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