Tubular sample sealing device

Abstract

The utility model provides a tubular sample sealing device which comprises an inflation system, a vacuum system, a high-pressure chamber, a clamping and rotating system and a laser system, and the inflation system and the vacuum system are both connected with the high-pressure chamber; the high-pressure chamber comprises a plurality of door plates, a bottom plate and a top plate, a glass window is arranged on the top plate, and at least one door plate can be opened; the inflation system is configured to provide to-be-sealed gas for the tubular sample, the tubular sample comprises a sample tube, an upper end plug and a lower end plug at the lower end, and an inflation hole is formed in the side face of the upper end plug; the vacuum system is configured to vacuumize the high-pressure chamber; the clamping and rotating system is configured to horizontally clamp the tubular sample and drive the tubular sample to rotate around the axis of the clamping and rotating system; the laser system is configured to provide laser welding energy. According to the sealing device, the sealing operation of the inflation hole can be completed in the circumferential welding end plug loading process.

Description

Technical Field

[0001] This utility model relates to the field of sample tube sealing technology, and in particular to a tubular sample sealing device.

[0002] This utility model claims priority with a priority date of January 6, 2025, and priority number 2025200239942. This utility model refers to the aforementioned priority document. Background Technology

[0003] In the field of materials science and engineering, the long-term performance evaluation of metallic materials under extreme conditions such as high temperature and high pressure, especially the accurate measurement of their creep properties, is a key aspect of ensuring the safe operation of equipment and extending its service life. Creep, as the phenomenon of gradual plastic deformation of metallic materials over time under constant stress, poses a significant threat to structural components such as pipes and containers in high-temperature and high-pressure environments.

[0004] By sealing a metal tube with gas, the creep performance of the metal sample tube can be tested; this is called an internal pressure creep test sample. Currently, the commonly used method for preparing internal pressure creep samples is to first weld end plugs to both ends, then fill the tube with gas, and finally weld the plugs to seal the tube.

[0005] However, although circumferential welding and plugging welding technologies are quite mature in the field of material joining, there is currently no integrated device on the market that can simultaneously perform circumferential welding and gas sealing functions. This means that in actual operation, circumferential welding and plugging welding must be performed step by step, increasing process complexity and potential risks.

[0006] It should be noted that the information disclosed in the background section of this utility model is intended only to enhance the understanding of the general background of this utility model, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a tubular sample sealing device that can simultaneously seal the air filling hole during the ring welding of the upper end plug, effectively reducing the complexity and time cost of the sample tube sealing process.

[0008] To achieve the above objectives, this utility model provides a tubular sample sealing device, including a gas filling system, a vacuum system, a high-pressure chamber, a clamping and rotating system, and a laser system. Both the gas filling system and the vacuum system are connected to the high-pressure chamber. The high-pressure chamber includes multiple door panels, a bottom plate, and a top plate. The top plate has a glass window. The multiple door panels are arranged circumferentially and connected sequentially. The bottom plate is connected to the bottom of the multiple door panels, and the top plate is connected to the top of the multiple door panels. At least one door panel can be opened. The gas filling system is configured to provide the tubular sample to be sealed with gas, wherein the tubular sample includes a sample tube and a... An upper plug is installed at the upper end of the sample tube, and a lower plug is installed at the lower end of the sample tube. The side of the upper plug has an inflation hole that communicates with the inner cavity of the sample tube. The vacuum system is configured to evacuate the high-pressure chamber. The clamping and rotating system is horizontally disposed in the high-pressure chamber and is configured to horizontally clamp the tubular sample and drive the tubular sample to rotate around its axis. The laser system is located above the high-pressure chamber and is configured to provide laser welding energy to weld the lower plug and the upper plug to the lower end and the upper end of the sample tube, respectively.

[0009] Optionally, the inflation system includes a gas source, a gas pipeline, a pressure transmitter, and an inflation valve. The inlet end of the gas pipeline is connected to the gas source, and the outlet end of the gas pipeline is connected to the high-pressure chamber. The pressure transmitter and the inflation valve are both installed on the gas pipeline, and the pressure transmitter is configured to monitor the pressure inside the high-pressure chamber.

[0010] Optionally, the inflation system may also include a pressure relief valve connected to the high-pressure chamber.

[0011] Optionally, the vacuum system includes a mechanical pump, a molecular pump, a vacuum gauge, a vacuum line, and a vacuum valve. The inlet end of the vacuum line is connected to the high-pressure chamber, and the outlet end of the vacuum line is connected to the mechanical pump and the molecular pump. The vacuum gauge and the vacuum valve are both located on the vacuum line. The mechanical pump is configured to perform coarse evacuation of the high-pressure chamber, the molecular pump is configured to perform fine evacuation of the high-pressure chamber, and the vacuum gauge is configured to monitor the vacuum level in the high-pressure chamber.

[0012] Optionally, the clamping and rotating system includes a connected chuck and a rotary motor, the chuck being configured to horizontally clamp the tubular sample, and the rotary motor being configured to drive the chuck and the tubular sample to rotate.

[0013] Optionally, the laser system includes a connected laser, an optical fiber, and a laser head. The laser and the laser head are connected via the optical fiber. The laser is configured to provide a laser beam, and the optical fiber is configured to transmit the laser beam provided by the laser to the laser head. The laser head is configured to focus the received laser beam to weld the lower plug to the lower end of the sample tube, or to weld the upper plug to the upper end of the sample tube.

[0014] Optionally, the tubular sample sealing device provided by this utility model further includes an imaging device, which is located above the high-pressure chamber and is configured to locate the weld seam on the upper plug.

[0015] Optionally, the tubular sample sealing device provided by this utility model further includes a triaxial displacement stage, wherein the laser head and the imaging device are both connected to the triaxial displacement stage, and the triaxial displacement stage is configured to drive the laser head and the imaging device to move in multiple directions.

[0016] Optionally, the tubular sample sealing device provided by this utility model also includes a control system, wherein the gas filling system, the vacuum system, the laser system and the clamping rotation system are all communicatively connected to the control system.

[0017] Optionally, both the upper and lower surfaces of the glass window are coated with an anti-reflective film.

[0018] Compared with the prior art, the tubular sample sealing device provided by this utility model has the following advantages:

[0019] This invention, by incorporating a vacuum system, allows for the evacuation of the high-pressure chamber before sealing the lower end plug and sample tube, and before sealing the upper end plug and sample tube. This creates a vacuum environment within the high-pressure chamber. In a vacuum environment, laser penetration is greater and the molten pool is more uniform, which helps form a dense, non-porous weld. Simultaneously, it removes the original gas from the high-pressure chamber, ensuring the purity and pressure accuracy of the subsequently introduced gas. Furthermore, the gas filling system creates a high-pressure environment within the high-pressure chamber and simultaneously provides gas filling for the sample. The system provides high-pressure gas for sealing. A clamping and rotating system horizontally clamps the tubular sample and drives it to rotate around its own axis, ensuring uniform fusion of the weld seam during subsequent laser welding. This avoids localized overheating or welding defects, ensuring the reliable sealing of the upper and lower plugs with the sample tube. It also ensures the sealing of the gas filling hole on the upper plug during the welding process. By placing the laser system above the high-pressure chamber, optical path interference is effectively reduced, improving energy utilization and welding accuracy. Since the tubular sample sealing device provided by this invention can simultaneously seal the gas filling hole while the upper plug is circumferentially welded to the upper end of the sample tube, the sealing of the tubular sample can be completed with just two circumferential welds, effectively reducing the complexity and time cost of the tubular sample sealing process. Furthermore, since at least one door plate in the high-pressure chamber can be opened, it is easier to place or remove the tubular sample from the high-pressure chamber. Attached Figure Description

[0020] Figure 1 A front view of a tubular sample sealing device provided in one embodiment of the present invention;

[0021] Figure 2 A top view of a tubular sample sealing device provided in one embodiment of this utility model;

[0022] Figure 3 A top view of a high-pressure chamber provided in one embodiment of this utility model;

[0023] Figure 4 A cross-sectional view of a high-pressure chamber provided in one embodiment of the present invention;

[0024] Figure 5 A cross-sectional view of a sample tube with an upper plug and a lower plug provided according to one embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of an inflation system provided in one embodiment of the present invention;

[0026] Figure 7This is a schematic diagram of the structure of a vacuum system provided in one embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram showing the connection relationship between the laser head and the imaging device according to one embodiment of the present invention.

[0028] The reference numerals in the attached figures are explained as follows:

[0029] Inflation system - 100; Gas source - 110; Gas pipeline - 120; Pressure transmitter - 130; Inflation valve - 140; Pressure relief valve - 150;

[0030] Vacuum system - 200; Mechanical pump - 210; Molecular pump - 220; Vacuum gauge - 230; Vacuum tubing - 240; Vacuum valve - 250;

[0031] High-pressure chamber - 300; Door panel - 310; Top panel - 320; Glass window - 330;

[0032] Clamping and rotating system-400; Chuck-410; Rotary motor-420;

[0033] Laser system-500; Laser-510; Fiber optic cable-520; Laser head-530;

[0034] Tubular sample - 600; Sample tube - 610; Upper plug - 620; Inflation hole - 621; Lower plug - 630;

[0035] Imaging device-710; Three-axis displacement stage-720;

[0036] Control system - 800; Frame - 900; Worktable - 910. Detailed Implementation

[0037] The tubular sample sealing device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in proportions, or adjustments to the size, provided that they produce the same or similar effects and achieve the same purpose as this utility model, should still fall within the scope of the technical content disclosed in this utility model. Specific design features of this utility model disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and usage environment. Furthermore, in the embodiments described below, the same reference numerals are sometimes used across different drawings to denote the same parts or parts having the same function, omitting repeated descriptions. In this specification, similar reference numerals and letters are used to denote similar items; therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The singular forms “a,” “one,” and “the” include plural objects. The term “or” is generally used to mean “and / or.” The term “several” is generally used to mean “at least one.” The term “at least two” is generally used to mean “two or more.” The term “multiple” is generally used to mean “at least two.”

[0039] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The core idea of ​​this utility model is to provide a tubular sample sealing device that can simultaneously complete the sealing operation of the air filling hole during the ring welding of the upper end plug, which can effectively reduce the complexity and time cost of the sample tube sealing process.

[0041] To achieve the above-mentioned goals, this utility model provides a tubular sample sealing device, please refer to... Figures 1 to 5 ,in, Figure 1 A front view of a tubular sample sealing device provided in one embodiment of the present invention; Figure 2 A top view of a tubular sample sealing device provided in one embodiment of this utility model;

[0042] Figure 3 A top view of a high-pressure chamber provided in one embodiment of this utility model; Figure 4 A cross-sectional view of a high-pressure chamber provided in one embodiment of the present invention; Figure 5This is a cross-sectional view of a sample tube with an upper plug and a lower plug installed, according to one embodiment of the present invention. Figures 1 to 5 As shown, the tubular sample sealing device provided by this utility model includes an inflation system 100, a vacuum system 200, a high-pressure chamber 300, a clamping and rotating system 400, and a laser system 500. The inflation system 100 and the vacuum system 200 are both connected to the high-pressure chamber 300. The high-pressure chamber 300 includes multiple door panels 310, a bottom plate (not shown), and a top plate 320. The top plate 320 is provided with a glass window 330. The multiple door panels 310 are arranged circumferentially and connected sequentially. The bottom plate is connected to the bottom of the multiple door panels 310, and the top plate 320 is connected to the top of the multiple door panels 310. At least one door panel 310 can be opened. The inflation system 100 is configured to provide the tubular sample 600 with the gas to be sealed, wherein the tubular sample 600 includes a sample tube 61. 0. An upper plug 620 is installed at the upper end of the sample tube 610, and a lower plug 630 is installed at the lower end of the sample tube 610. The upper plug 620 has an inflation hole 621 on its side that communicates with the inner cavity of the sample tube 610. The vacuum system 200 is configured to evacuate the high-pressure chamber 300. The clamping and rotating system 400 is horizontally disposed in the high-pressure chamber 300. The clamping and rotating system 400 is configured to horizontally clamp the tubular sample 600 and drive the tubular sample 600 to rotate around its axis. The laser system 500 is located above the high-pressure chamber 300. The laser system 500 is configured to provide laser welding energy to weld the lower plug 630 and the upper plug 620 to the lower and upper ends of the sample tube 610, respectively.

[0043] Therefore, by setting up a vacuum system 200, this utility model can evacuate the high-pressure chamber 300 before sealing and welding the lower end plug 630 and the lower end sample tube 610, and before sealing and welding the upper end plug 620 and the upper end sample tube 610, to achieve a vacuum environment within the high-pressure chamber 300. In a vacuum environment, the laser penetration depth is greater, the molten pool is more uniform, and the weld pool will not be oxidized, thus helping to form a dense, non-porous weld. Simultaneously, it can remove the original gas within the high-pressure chamber 300, ensuring the purity and pressure accuracy of the subsequently introduced gas. By setting up a gas filling system 100, a high-pressure environment can be achieved within the high-pressure chamber 300. Simultaneously, it can provide high-pressure gas to be sealed to the sample tube 610; by setting the clamping and rotating system 400, the tubular sample 600 can be horizontally clamped and driven to rotate around its own axis, thereby achieving uniform fusion of the weld in the subsequent laser welding process, avoiding local overheating or welding defects, and ensuring the sealing reliability of the upper plug 620 and lower plug 630 with the sample tube 610. At the same time, it can also ensure that the gas filling hole 621 on the upper plug 620 can be sealed during the welding of the upper plug 620 to the upper end of the sample tube 610; by setting the laser system 500 above the high-pressure chamber 300, optical path interference can be effectively reduced, and energy utilization and welding accuracy can be improved. Since the tubular sample sealing device provided by this utility model can simultaneously complete the sealing operation of the gas filling hole 621 during the process of circumferential welding the upper plug 620 to the upper end of the sample tube 610, it can be seen that this utility model can complete the sealing of the tubular sample 600 through two circumferential welds, thereby effectively reducing the complexity and time cost of the tubular sample 600 sealing process. Furthermore, since at least one door panel 310 in the high-pressure chamber 300 can be opened, it is easier to place the tubular sample 600 into or remove the tubular sample 600 from the high-pressure chamber 300.

[0044] In some exemplary embodiments, both the upper and lower surfaces of the glass window 330 are coated with an anti-reflective film. Therefore, by providing an anti-reflective film on both the upper and lower surfaces of the glass window 330, interference from reflected light can be effectively suppressed, laser energy loss can be significantly reduced, and laser energy can be efficiently applied to the welding area, improving welding precision and stability.

[0045] Furthermore, the wavelength range of light transmitted by the antireflective film can be 700nm to 1064nm.

[0046] Furthermore, the glass window 330 can be made of aluminosilicate glass. Since aluminosilicate glass has a much higher mechanical strength than ordinary glass, using aluminosilicate glass for the glass window 330 can effectively ensure the sealing and safety of the high-pressure chamber 300 in a high-pressure environment.

[0047] Furthermore, the thickness of the glass window 330 ranges from 20mm to 50mm, for example, the thickness of the glass window 330 can be 30mm. Therefore, a glass window 330 of this thickness can withstand the extreme pressure within the high-pressure chamber 300, effectively ensuring the sealing and safety of the high-pressure chamber 300 under high-pressure conditions.

[0048] In some exemplary embodiments, the outer diameter of the sample tube 610 ranges from 5 mm to 30 mm, the wall thickness ranges from 0.3 mm to 3 mm, and the length ranges from 50 mm to 500 mm. For example, the outer diameter of the sample tube 610 can be 12 mm or 10 mm, the wall thickness can be 0.6 mm or 0.5 mm, and the length can be 100 mm or 130 mm.

[0049] Furthermore, the diameter of the air inlet 621 ranges from 0.3 mm to 0.8 mm.

[0050] In some exemplary embodiments, the top plate 320 and the glass window 330 are sealed together by brazing. This arrangement ensures a seamless metallurgical bond between the top plate 320 and the glass window 330, enabling it to withstand high pressure and vacuum environments, effectively avoiding the risk of gas leakage, and ensuring the long-term sealing stability of the high-pressure chamber 300.

[0051] Please continue to refer to this. Figure 6 This is a structural schematic diagram of the inflation system 100 provided in one embodiment of the present invention. Figure 6 As shown, the inflation system 100 includes a gas source 110, a gas pipeline 120, a pressure transmitter 130, and an inflation valve 140. The inlet end of the gas pipeline 120 is connected to the gas source 110, and the outlet end of the gas pipeline 120 is connected to the high-pressure chamber 300. The pressure transmitter 130 and the inflation valve 140 are both installed on the gas pipeline 120. The pressure transmitter 130 is configured to monitor the pressure inside the high-pressure chamber 300. Therefore, by setting the gas source 110, a stable and high-purity gas to be sealed (such as argon or helium) can be provided; by setting the gas pipeline 120, the safe delivery of the gas can be ensured; by setting the pressure transmitter 130, the pressure inside the high-pressure chamber 300 can be monitored in real time, thereby allowing for precise adjustment of the gas flow rate and target pressure to avoid over- or under-inflation; and by setting the inflation valve 140, the connection or disconnection between the gas pipeline 120 and the high-pressure chamber 300 can be flexibly achieved.

[0052] Furthermore, the gas source 110 is preferably a high-pressure gas cylinder. This eliminates the need for an additional pressurization device, helping to simplify the overall structure of the tubular sample sealing device provided by this invention.

[0053] Furthermore, the gas pipeline 120 is preferably a high-pressure resistant pipeline. This can reduce the risk of gas leakage or pipeline rupture.

[0054] Please continue to refer to this. Figure 6 ,like Figure 6 As shown, in some exemplary embodiments, the inflation system 100 further includes a pressure relief valve 150 connected to the high-pressure chamber 300. Thus, by providing the pressure relief valve 150, an overpressure protection function can be achieved, further ensuring the safety of the tubular sample sealing device provided by this invention during use.

[0055] Please continue to refer to this. Figure 7 This is a structural schematic diagram of a vacuum system 200 provided in one embodiment of the present invention. Figure 7 As shown, in some exemplary embodiments, the vacuum system 200 includes a mechanical pump 210, a molecular pump 220, a vacuum gauge 230, a vacuum line 240, and a vacuum valve 250. The inlet of the vacuum line 240 is connected to the high-pressure chamber 300, and the outlet of the vacuum line 240 is connected to the mechanical pump 210 and the molecular pump 220. The vacuum gauge 230 and the vacuum valve 250 are both mounted on the vacuum line 240. The mechanical pump 210 is configured to perform coarse evacuation of the high-pressure chamber 300, the molecular pump 220 is configured to perform fine evacuation of the high-pressure chamber 300, and the vacuum gauge 230 is configured to monitor the vacuum level within the high-pressure chamber 300. Thus, by using the mechanical pump 210 as a backing pump, the pressure within the high-pressure chamber 300 can be quickly reduced to a medium vacuum range (e.g., 10⁻⁶). -1 Using a molecular pump 220 as a post-stage pump, the high-pressure chamber 300 can be further pumped to a high vacuum (e.g., 10 Pa). -2 ~10 -4 This multi-stage combination (Pa) can effectively shorten the vacuuming time while covering a wide range of vacuum requirements, meeting the clean environment requirements for sample sealing. Furthermore, by setting up a vacuum gauge 230, the vacuum level within the high-pressure chamber 300 can be monitored in real time, ensuring that the vacuum level within the high-pressure chamber 300 remains stable at the target value, avoiding contamination from pores or impurities caused by vacuum fluctuations during welding. By setting up a vacuum valve 250, the connection or disconnection between the vacuum pipeline 240 and the high-pressure chamber 300 can be flexibly achieved.

[0056] Please continue to refer to this. Figure 3 and Figure 4 ,like Figure 3 and Figure 4As shown, in some exemplary embodiments, the clamping and rotating system 400 includes a connected chuck 410 and a rotary motor 420. The chuck 410 is configured to horizontally clamp the tubular sample 600, and the rotary motor 420 is configured to drive the chuck 410 and the tubular sample 600 to rotate. Thus, the chuck 410 can achieve stable clamping of the tubular sample 600, and the rotary motor 420 can provide a stable rotational speed, ensuring uniform formation of the molten pool during laser welding and avoiding weld discontinuities or expansion of the heat-affected zone due to rotational speed fluctuations.

[0057] It should be noted that this utility model does not limit the specific structure of the chuck 410. The specific structure and working principle of the chuck 410 can be adapted by referring to the three-jaw chuck 410 in the prior art, and will not be described in detail here.

[0058] Please continue to refer to this. Figure 1 ,like Figure 1 As shown, in some exemplary embodiments, the laser system 500 includes a connected laser 510, an optical fiber 520, and a laser head 530. The laser 510 and the laser head 530 are connected via the optical fiber 520. The laser 510 is configured to provide a laser beam, and the optical fiber 520 is configured to transmit the laser beam provided by the laser 510 to the laser head 530. The laser head 530 is configured to focus the received laser beam to weld the lower plug 630 to the lower end of the sample tube 610, or to weld the upper plug 620 to the upper end of the sample tube 610. This arrangement not only enables a modular design of the laser system 500, facilitating individual maintenance of the laser 510, optical fiber 520, and laser head 530, but also contributes to achieving high-stability, high-precision welding. In this way, by using an optical fiber 520 to connect the laser 510 and the laser head 530, electrical interference between the high-voltage chamber 300 and the laser 510 can be isolated, reducing the risk of short circuits or arcing. In addition, since the optical fiber 520 is flexible, it can be ensured that the laser head 530 can move flexibly with the triaxial displacement stage 720 described below, thereby enabling the laser to be incident into the high-voltage chamber 300 from different positions.

[0059] Please continue to refer to this. Figure 1 ,like Figure 1As shown, in some exemplary embodiments, the tubular sample sealing device provided by this utility model further includes an imaging device 710, which is located above the high-pressure chamber 300. The imaging device 710 is configured to locate the weld on the upper plug 620. Thus, by setting the imaging device 710, images of the weld area of ​​the upper plug 620 can be captured in real time, thereby accurately identifying the weld position and molten pool morphology, ensuring that the laser focus point is aligned with the weld center, and effectively improving the welding effect.

[0060] Please continue to refer to this. Figure 1 and Figure 2 ,like Figure 1 and Figure 2 As shown, in some exemplary embodiments, the tubular sample sealing device provided by this utility model further includes a triaxial displacement stage 720. The laser head 530 and the imaging device 710 are both connected to the triaxial displacement stage 720. The triaxial displacement stage 720 is configured to drive the laser head 530 and the imaging device 710 to move in multiple directions. Therefore, by setting the triaxial displacement stage 720, the laser head 530 and the imaging device 710 can be driven to move in multiple directions such as the X-axis, Y-axis, and Z-axis. This ensures that the laser head 530 and the imaging device 710 maintain a preset relative positional relationship (e.g., the laser focus and the imaging field of view are aligned) during movement, avoiding mechanical errors caused by separate driving and significantly improving welding positioning accuracy.

[0061] Please continue to refer to this. Figure 8 This is a schematic diagram showing the connection relationship between the laser head 530 and the imaging device 710 provided in one embodiment of the present invention. Figure 8 As shown, the imaging device 710 is connected to the laser head 530. Therefore, by integrating the imaging device 710 and the laser head 530, synchronous movement of the two devices can be easily achieved, ensuring that their relative positions remain consistent. Even if the laser head 530 adjusts its focus or shifts, the field of view of the imaging device 710 can still track the welding area in real time, avoiding field of view shifts caused by separate movement, thereby significantly reducing the need for manual calibration before welding.

[0062] Please continue to refer to this. Figure 1 and Figure 2 ,like Figure 1 and Figure 2As shown, in some exemplary embodiments, the tubular sample sealing device provided by this invention further includes a control system 800. The gas filling system 100, the vacuum system 200, the laser system 500, the imaging device 710, the clamping rotation system 400, and the triaxial displacement stage 720 are all communicatively connected to the control system 800. Therefore, the control system 800 can precisely adjust the pressure within the high-pressure chamber 300, the laser energy and defocusing amount of the laser system 500, the rotational speed of the clamping rotation system 400, and the position of the triaxial displacement stage 720, thereby achieving precise adjustment of welding parameters, avoiding human error, and significantly improving the uniformity and reliability of the welding.

[0063] Specifically, the control system 800 includes a host and a display. Thus, the display can show in real time the pressure and vacuum level within the high-pressure chamber 300, the laser energy and defocusing amount of the laser system 500, the rotational speed of the clamping rotation system 400, and images captured by the imaging device 710.

[0064] Please continue to refer to this. Figure 1 ,like Figure 1 As shown, the tubular sample sealing device provided by this utility model also includes a frame 900, the top of which is provided with a worktable 910, and the control system 800, the laser system 500 and the high-pressure chamber 300 are all disposed on the worktable 910.

[0065] The working principle of the tubular sample sealing device provided by this utility model is briefly described below. Specifically, the steps for using the tubular sample sealing device provided by this utility model include:

[0066] Step 1) Place the assembled tubular sample 600 into the high-pressure chamber 300 and clamp the upper end of the tubular sample 600 onto the chuck 410;

[0067] Step 2) Control the vacuum system 200 to start, so as to evacuate the high-pressure chamber 300 to a preset vacuum level;

[0068] Step 3) Control the laser system 500 and the clamping rotation system 400 to start, and complete the welding of the lower end plug 630 and the lower end of the sample tube 610 according to the preset welding parameters, which include welding energy, rotation speed and defocusing amount;

[0069] Step 4) Remove the tubular sample 600 from the high-pressure chamber 300 and change the direction of the tubular sample 600. Then place the tubular sample 600 back into the high-pressure chamber 300 and clamp the lower end of the tubular sample 600 onto the chuck 410.

[0070] Step 5) Re-start the vacuum system 200 to re-evacuate the high-pressure chamber 300 to the preset vacuum level;

[0071] Step 6) Control the inflation system 100 to start, so as to inflate the high-pressure chamber 300 until the pressure in the high-pressure chamber 300 reaches the preset pressure, and let it stand for a preset time.

[0072] Step 7) Re-control the laser system 500 and the clamping rotation system 400 to start, and complete the welding of the upper plug 620 and the upper end of the sample tube 610 according to the preset welding parameters, thereby completing the sealing of the tubular sample 600.

[0073] It should be noted that, as those skilled in the art will understand, this utility model does not limit the specific values ​​of the welding energy, the rotation speed, the defocusing amount, the preset vacuum degree, the preset pressure, and the preset duration. The welding energy can range from 300W to 1500W, for example, the welding energy can be 400W or 500W; the rotation speed can range from 2rpm to 10rpm, for example, the rotation speed can be 3rpm or 4rpm; the defocusing amount can range from -2mm to +5mm, for example, the defocusing amount can be +1mm or +2mm; the preset vacuum degree can range from 10... -2 Pa~10 -4 Pa, for example, the preset vacuum level can be 10 Pa. -3 Pa; the preset pressure can range from 0.1 MPa to 40 MPa, for example, the preset pressure can be 1 MPa, 10 MPa, 20 MPa, or 30 MPa; the preset duration can range from 10 min to 20 min. It should also be noted that, as those skilled in the art will understand, when it is not necessary to seal the gas in the tubular sample 600, step 6 above may be omitted.

[0074] It should be noted that in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] It should also be noted that the above description is only a description of the preferred embodiment of this utility model and is not intended to limit the scope of this utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure are within the protection scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A tubular sample sealing device, characterized by, The system comprises an inflation system, a vacuum system, a high-pressure chamber, a clamping and rotating system and a laser system, wherein the inflation system and the vacuum system are connected to the high-pressure chamber; The high-pressure chamber comprises a plurality of door plates, a bottom plate and a top plate, the top plate is provided with a glass window, the plurality of door plates are arranged circumferentially and connected in sequence, the bottom plate is connected to the bottom of the plurality of door plates, the top plate is connected to the top of the plurality of door plates, and at least one of the door plates can be opened; The inflation system is configured to provide a to-be-sealed gas for a tubular sample, wherein the tubular sample comprises a sample tube, an upper end plug mounted on an upper end of the sample tube, and a lower end plug mounted on a lower end of the sample tube, a side surface of the upper end plug is provided with an inflation hole in communication with an inner cavity of the sample tube; The vacuum system is configured to perform vacuumization on the high-pressure chamber; The clamping and rotating system is horizontally arranged in the high-pressure chamber, and is configured to horizontally clamp the tubular sample and drive the tubular sample to rotate around an axis thereof; The laser system is located above the high-pressure chamber, and is configured to provide laser welding energy to weld the lower end plug and the upper end plug to the lower end and the upper end of the sample tube, respectively.

2. The tubular sample sealing device of claim 1, wherein, The inflation system comprises a gas source, a gas pipeline, a pressure transmitter and an inflation valve, an inlet end of the gas pipeline is connected to the gas source, an outlet end of the gas pipeline is connected to the high-pressure chamber, the pressure transmitter and the inflation valve are mounted on the gas pipeline, and the pressure transmitter is configured to monitor the pressure in the high-pressure chamber.

3. The tubular sample sealing device of claim 2, wherein, The inflation system further comprises a pressure relief valve connected to the high-pressure chamber.

4. The tubular sample sealing device of claim 1, wherein, The vacuum system comprises a mechanical pump, a molecular pump, a vacuum gauge, a vacuum pipeline and a vacuum valve, an inlet end of the vacuum pipeline is connected to the high-pressure chamber, an outlet end of the vacuum pipeline is connected to the mechanical pump and the molecular pump, the vacuum gauge and the vacuum valve are arranged on the vacuum pipeline, the mechanical pump is configured to perform rough vacuumization on the high-pressure chamber, the molecular pump is configured to perform fine vacuumization on the high-pressure chamber, and the vacuum gauge is configured to monitor the vacuum degree in the high-pressure chamber.

5. The tubular sample sealing device of claim 1, wherein, The clamping and rotating system comprises a chuck and a rotating motor connected in sequence, the chuck is configured to horizontally clamp the tubular sample, and the rotating motor is configured to drive the chuck and the tubular sample to rotate.

6. The tubular sample sealing device of claim 1, wherein, The laser system comprises a laser, an optical fiber and a laser head connected in sequence, the laser and the laser head are connected through the optical fiber, the laser is configured to provide a laser beam, the optical fiber is configured to transmit the laser beam provided by the laser to the laser head, and the laser head is configured to focus the received laser beam to weld the lower end plug to the lower end of the sample tube or to weld the upper end plug to the upper end of the sample tube.

7. The tubular sample sealing device of claim 6, wherein, Further comprising an imaging device located above the high-pressure chamber, and the imaging device is configured to position a weld seam on the upper end plug.

8. The tubular sample sealing device of claim 7, wherein, The three-axis displacement table is further connected with the laser head and the imaging device, and is configured to drive the laser head and the imaging device to move in multiple directions.

9. The tubular sample sealing device of claim 1, wherein, The control system is further connected with the inflation system, the vacuum system, the laser system and the clamping and rotating system.

10. The tubular sample sealing device according to any one of claims 1 to 9, characterized in that, The upper surface and the lower surface of the glass window are coated with an anti-reflection film.

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