A bolt storage method and a storage device capable of maintaining residual stress

Abstract

The application discloses a bolt storage method capable of keeping residual stress, relates to the technical field of bolt storage, and comprises the following steps: adding oil liquid into a closed container and immersing bolts in the oil liquid; controlling the pressure in the closed container within a preset pressure range and controlling the temperature in the closed container within a preset temperature range; when the bolts need to be taken out, adjusting the pressure in the closed container to atmospheric pressure and adjusting the temperature in the closed container to room temperature; the bolt storage method can significantly inhibit the natural dissipation of the residual stress of the bolts, and guarantees that the bolts can still keep stable mechanical properties and fastening properties after long-term storage.

Description

Technical Field

[0001] This invention relates to the field of bolt preservation technology, specifically a bolt preservation method and device capable of maintaining residual stress. Background Technology

[0002] Bolts are the most commonly used basic fasteners in mechanical connections, and their connection reliability directly affects the overall performance of mechanical equipment. Residual stress refers to the elastic stress that exists within a bolt in a self-balancing state due to various manufacturing processes when no external force is applied. Appropriately distributed residual stress can effectively improve the bolt's tightening performance, and residual stress is an important indicator of bolt quality. However, the residual stress in bolts gradually dissipates with prolonged storage time, leading to a decrease in the bolt's tightening performance.

[0003] Currently, existing methods for storing bolts mainly involve passive protection measures such as surface rust prevention treatment and controlling the humidity and temperature of the storage environment. While these methods can delay surface oxidation and corrosion to some extent, they do not address the active maintenance of residual stress in the bolts and cannot suppress the natural dissipation of residual stress. Existing technologies lack methods for stably maintaining residual stress in bolts, and also lack corresponding storage devices, making it difficult to effectively preserve residual stress in bolts. Summary of the Invention

[0004] To address the shortcomings of existing bolt preservation methods in maintaining residual stress, this invention provides a bolt preservation method and device capable of preserving residual stress by keeping the bolt under constant temperature and pressure.

[0005] To achieve the above objectives, the specific solution adopted by the present invention is as follows: a bolt preservation method capable of maintaining residual stress, comprising the following steps: Add oil to a sealed container and immerse the bolts in the oil; The pressure inside the sealed container is controlled within a preset pressure range, and the temperature inside the sealed container is controlled within a preset temperature range. When bolts are needed, adjust the pressure inside the sealed container to atmospheric pressure and adjust the temperature inside the sealed container to room temperature.

[0006] An optimized solution to the above-mentioned bolt preservation method that can maintain residual stress includes a method for controlling the pressure inside the sealed container within a preset pressure range and the temperature inside the sealed container within a preset temperature range, comprising: Adjust the pressure inside the sealed container to the pre-set pressure value; Adjust the temperature inside the sealed container to the preset temperature range; Adjust the pressure inside the sealed container from the pre-set pressure value to the preset pressure range.

[0007] As an alternative optimization of the bolt preservation method that can maintain residual stress, the pressure inside the sealed container is controlled within a preset pressure range and the temperature inside the sealed container is controlled within a preset temperature range, and then the speed is adjusted synchronously according to a preset speed gradient.

[0008] A bolt storage device capable of maintaining residual stress includes a tank for storing bolts, a removable sealing cap disposed on the top of the tank, a pressure control component for controlling the pressure inside the tank, and a temperature control component for controlling the temperature inside the tank. The tank is provided with at least one receiving assembly for accommodating bolts. The receiving assembly includes an upward-opening barrel-shaped filter screen and a first connecting ring connected to the top of the barrel-shaped filter screen. A second connecting ring is connected to the top of the first connecting ring. The first connecting ring and the second connecting ring are coaxially arranged, and the diameter of the second connecting ring is larger than the diameter of the first connecting ring, thereby forming a first annular boss at the connection between the first connecting ring and the second connecting ring. The pressure control components include a pressure regulating pump for adjusting the pressure inside the tank; The temperature control assembly includes a temperature control tube for adjusting the temperature inside the tank, through which a heat transfer medium is circulated, and the temperature control tube is spirally wound around the outer wall of the tank.

[0009] As an optimized solution of the above-mentioned bolt storage device capable of maintaining residual stress: the pressure control component includes a pressure sensor for detecting the pressure inside the tank, the temperature control component includes a temperature sensor for detecting the temperature inside the tank, the pressure regulating pump adjusts the pressure inside the tank according to the detection result of the pressure sensor, and the temperature control tube adjusts the temperature inside the tank according to the detection result of the temperature sensor.

[0010] As another optimized embodiment of the bolt retention device capable of maintaining residual stress, the receiving assembly includes a first support ring and a second support ring disposed at the bottom of the barrel-shaped filter screen. The second support ring is connected to the inner side of the first support ring, the first support ring is connected to the side wall of the barrel-shaped filter screen, and the second support ring is connected to the bottom of the barrel-shaped filter screen.

[0011] As another optimized solution for the bolt preservation device that can maintain residual stress, the side wall of the barrel-shaped filter screen is provided with multiple support columns, and the two ends of the support columns are respectively connected to the first connecting ring and the first support ring.

[0012] As another optimized embodiment of the bolt retention device capable of maintaining residual stress, the receiving component includes an arc-shaped pull ring with both ends rotatably disposed within a first connecting ring.

[0013] As another optimized solution of the above-mentioned bolt storage device that can maintain residual stress: the sealing cap is threadedly connected to the top of the tank, a second annular boss is provided on the inner wall of the tank, and a sealing ring is provided on the threaded end of the sealing cap. When the sealing cap is tightened to the tank, the end face of the sealing ring is pressed against the second annular boss.

[0014] As another optimized embodiment of the bolt preservation device capable of maintaining residual stress, the device further includes a protective shell, with the tank, pressure control components, and temperature control components all located inside the protective shell.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The bolt preservation method of the present invention immerses the bolt in oil and maintains the pressure and temperature in the sealed container within a preset range, which can significantly inhibit the natural dissipation of residual stress in the bolt and ensure that the bolt can maintain stable mechanical properties and fastening performance after long-term storage.

[0016] 2. The bolt storage device of the present invention provides a controllable constant temperature and pressure storage environment for bolts in the sealed space formed by the sealing cap and the can. The can is equipped with a receiving component to realize the classification and layered storage of bolts, which facilitates the operation of taking and putting away bolts. The overall structure is stable. The bolt storage device can effectively suppress the dissipation of bolt residual stress and realize the long-term maintenance of bolt residual stress. Attached Figure Description

[0017] Figure 1 This is a flowchart of the bolt preservation method of the present invention; Figure 2 This is a schematic diagram of the overall structure of the bolt storage device of the present invention; Figure 3 This is a cross-sectional view of the component housing in this invention. Figure 4 This is a schematic diagram of the overall structure of the accommodating component of the present invention; Figure 5 This is a schematic diagram of the tank body of the present invention; Figure 6 This is a schematic diagram of the sealing cap of the present invention; Figure 7 This is a schematic diagram of the structure of the tank body and sealing cap combined according to the present invention.

[0018] Reference numerals: 1. Tank body; 2. Sealing cap; 3. Barrel-shaped filter screen; 4. First connecting ring; 5. Second connecting ring; 6. First annular boss; 7. Pressure regulating pump; 8. Temperature control tube; 9. Temperature sensor; 10. First support ring; 11. Second support ring; 12. Support column; 13. Pull ring; 14. Second annular boss; 15. Sealing ring; 16. Protective shell; 17. Connection port. Detailed Implementation

[0019] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of the present invention should be understood as prior art known or should be known by those skilled in the art.

[0020] Example 1

[0021] like Figure 1 As shown, a bolt preservation method capable of maintaining residual stress includes S1 to S3.

[0022] S1. Add oil to a sealed container and immerse the bolts in the oil. The sealed container can be of conventional shapes such as cylindrical or square; this embodiment does not specify a particular shape. First, add oil to the sealed container, ensuring the bolts are completely submerged. Then, gently place the bolts into the oil in the sealed container. The placement process should be smooth to avoid violent collisions between bolts or between the bolts and the inner wall of the sealed container, preventing damage to the bolt surface. The type of oil can be flexibly selected according to the bolt material and usage requirements. On the one hand, the oil prevents the bolts from direct contact with air, avoiding oxidation and corrosion during long-term storage. On the other hand, the oil also serves as a medium for conducting temperature and pressure, providing conditions for subsequent control of pressure and temperature within the sealed container.

[0023] S2. Controlling the pressure inside the sealed container within a preset pressure range and controlling the temperature inside the sealed container within a preset temperature range, wherein the method for controlling the pressure and temperature inside the sealed container within the preset range includes S21 to S23.

[0024] S21. Adjust the pressure inside the sealed container to the pre-set pressure value. Pressurize the sealed container to reach the pre-set pressure value, which is lower than the lower limit of the preset pressure range. The specific value of the pre-set pressure value is selected based on the preset pressure range required for bolt storage and the adjustment accuracy of the pressure regulating device.

[0025] S22. Adjust the temperature inside the sealed container to the preset temperature range. Based on the difference between the current ambient temperature and the preset temperature range, adjust the temperature inside the sealed container by raising or lowering it until the temperature of the oil inside the sealed container stabilizes within the preset temperature range.

[0026] S23. Adjust the pressure inside the sealed container from the pre-set pressure value to the preset pressure range. After the temperature inside the sealed container stabilizes within the preset temperature range, adjust the pressure inside the sealed container from the pre-set pressure value to the preset pressure range, and maintain pressure stability after adjustment.

[0027] Using a step-by-step control method can effectively avoid pressure fluctuations caused by temperature changes inside the sealed container. Therefore, the pressure inside the sealed container is first adjusted to the pre-set pressure value, then the temperature inside the sealed container is adjusted to the preset temperature range, and finally the pressure inside the sealed container is adjusted from the pre-set pressure value to the preset pressure range, thus avoiding the need for secondary pressure adjustment due to temperature changes.

[0028] S3. When it is necessary to retrieve the bolt, adjust the pressure inside the sealed container to atmospheric pressure and adjust the temperature inside the sealed container to room temperature. When it is necessary to retrieve the bolt, first release the pressure inside the sealed container from the preset pressure range to atmospheric pressure, then adjust the temperature of the oil inside the sealed container to room temperature. After the pressure and temperature inside the sealed container return to normal pressure and temperature, open the sealed container and retrieve the bolt.

[0029] This embodiment provides another method for adjusting pressure and temperature. When the pressure and temperature inside the sealed container are controlled within a preset pressure range and a preset temperature range, they are adjusted synchronously according to a preset speed gradient. Specifically, in the initial stage of adjustment, a faster speed gradient is used to synchronously adjust the pressure and temperature, causing the pressure and temperature inside the sealed container to quickly approach the preset pressure and temperature ranges. When the pressure and temperature approach the corresponding preset ranges, the speed gradient is reduced for fine-tuning until both pressure and temperature fall within the preset ranges. This synchronous adjustment method effectively improves adjustment efficiency and ensures that the pressure and temperature are stably maintained within the preset ranges.

[0030] Example 2

[0031] like Figures 2 to 4 As shown, this embodiment provides a bolt storage device capable of maintaining residual stress, including a tank 1 for storing bolts, a detachable sealing cap 2 on the top of the tank 1, a pressure control component for controlling the pressure inside the tank 1, and a temperature control component for controlling the temperature inside the tank 1; the tank 1 is provided with at least one receiving component for accommodating bolts, the receiving component including an upward-opening barrel-shaped filter 3 and a first connecting ring 4 connected to the top of the barrel-shaped filter 3, the top of the first connecting ring 4 being connected to a second connecting ring 5, the first connecting ring 4 and the second connecting ring 5 being coaxially arranged, and the diameter of the second connecting ring 5 being larger than the diameter of the first connecting ring 4, thereby forming a first annular boss 6 at the connection between the first connecting ring 4 and the second connecting ring 5; the pressure control component includes a pressure regulating pump 7 for adjusting the pressure inside the tank 1; the temperature control component includes a temperature control tube 8 for adjusting the temperature inside the tank 1, the temperature control tube 8 being circulated with a heat transfer medium, and the temperature control tube 8 being spirally wound around the outer wall of the tank 1.

[0032] The tank body 1 is a barrel-shaped structure with an open top. The sealing cap 2 is detachably fitted onto the top of the tank body 1. Both the tank body 1 and the sealing cap 2 are made of austenitic stainless steel. Oil is added to the tank body 1, completely submerging the bolts. On one hand, the oil prevents the bolts from direct contact with air, avoiding oxidation and corrosion during long-term storage. On the other hand, the oil also serves as a medium for temperature and pressure conduction, providing conditions for subsequent pressure and temperature control within the sealed container. The type of oil can be flexibly selected based on the bolt material and usage requirements. The entire housing assembly is made of austenitic stainless steel. A barrel-shaped filter screen 3 is fitted inside the tank body 1. A first connecting ring 4 is connected to the top of the barrel-shaped filter screen 3, and a second connecting ring 5 is connected to the top of the first connecting ring 4. The first connecting ring 4 and the second connecting ring 5 are coaxially arranged, and the diameter of the second connecting ring 5 is larger than the diameter of the first connecting ring 4, thus forming a first annular protrusion 6 at the connection between the first connecting ring 4 and the second connecting ring 5. The first connecting ring 4 is fixed to the barrel-shaped filter screen 3 and the second connecting ring 5 by welding. The receiving component significantly improves the convenience of bolt storage and retrieval. During storage, the bolts are placed inside the barrel-shaped filter screen 3, which separates the bolts from the inner wall of the tank 1, preventing them from bumping, scratching, or sticking to the inner wall. The barrel-shaped filter screen 3 can be stacked in multiple layers. The bottom of the upper barrel-shaped filter screen 3 is inserted into the second connecting ring 5 of the lower receiving component and abuts against the end face of the first annular protrusion 6, ensuring the structural stability of the barrel-shaped filter screen 3 in the multi-layer stacked state. Multiple barrel-shaped filter screens 3 can store bolts of different specifications separately, realizing the classified storage of bolts, which is convenient for subsequent retrieval as needed. At the same time, it can avoid the overall stacking height of bolts being too high, preventing the upper bolts from excessively compressing the lower bolts, and thus avoiding the dissipation of residual stress in the bolts due to external forces. The pressure regulating pump 7 is connected to the inside of the tank 1 through the connection port 17. The pressure regulating pump 7 is used to adjust and maintain the pressure inside the tank 1 within the preset pressure range. The temperature control tube 8 is spirally wound around the outer wall of the tank 1. A heat transfer medium is introduced into the temperature control tube 8. In this embodiment, the heat transfer medium is cooling water at different temperatures. By controlling the temperature of the heat transfer medium entering the temperature control tube 8, the temperature inside the tank 1 is adjusted to cool down or heat up, so that the temperature inside the tank 1 is maintained within the preset temperature range.

[0033] In this embodiment, a sealed storage space is formed by the tank body 1 and the sealing cover 2. The pressure regulating pump 7 and the temperature control pipe 8 provide a constant temperature and pressure storage environment for the bolts in the tank body 1, which effectively suppresses the dissipation of residual stress in the bolts. At the same time, a container component is set in the tank body 1 to realize the classified storage of bolts, which improves the convenience of bolt storage and retrieval.

[0034] Example 3

[0035] This embodiment is an improvement on embodiment 2. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 2 , Figure 5As shown, the pressure control component includes a pressure sensor (not shown) for detecting the pressure inside the tank 1, and the temperature control component includes a temperature sensor 9 for detecting the temperature inside the tank 1. The pressure regulating pump 7 adjusts the pressure inside the tank 1 according to the detection result of the pressure sensor, and the temperature control tube 8 adjusts the temperature inside the tank 1 according to the detection result of the temperature sensor 9.

[0036] In the pressure control assembly, a pressure sensor is installed inside the tank 1 to collect the pressure inside the tank 1 in real time. The pressure sensor and the pressure regulating pump 7 are electrically connected to the controller. The controller adjusts the pressure inside the tank 1 according to the pressure signal collected by the pressure sensor. Specifically, when the pressure sensor detects that the pressure inside the tank 1 deviates from the preset pressure range, the controller controls the pressure regulating pump 7 to pressurize or depressurize the inside of the tank 1 to maintain the pressure inside the tank 1 within the preset pressure range. In the temperature control assembly, a temperature sensor 9 is installed at the bottom of the tank 1 to collect the temperature of the oil inside the tank 1 in real time. The temperature sensor 9 and the heat transfer medium circulation system are electrically connected to the controller. The controller adjusts the temperature inside the tank 1 according to the temperature signal collected by the temperature sensor 9. Specifically, when the temperature sensor 9 detects that the temperature inside the tank 1 deviates from the preset temperature range, the controller adjusts the temperature of the heat transfer medium entering the temperature control tube 8 to cool or heat the inside of the tank 1 to maintain the temperature inside the tank 1 within the preset temperature range. It should be noted that the specific structure and working principle of the controller, pressure sensor, temperature sensor 9, pressure regulating pump 7, and circulation system, as well as the cooperation between the controller and the pressure sensor, temperature sensor 9, pressure regulating pump 7, and circulation system, are all conventional existing technologies in the field and will not be described in detail here.

[0037] Example 4

[0038] This embodiment is an improvement on embodiment 2. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 3 , Figure 4 As shown, the housing assembly includes a first support ring 10 and a second support ring 11 disposed at the bottom of the barrel-shaped filter screen 3. The second support ring 11 is connected to the inner side of the first support ring 10. The first support ring 10 is connected to the side wall of the barrel-shaped filter screen 3, and the second support ring 11 is connected to the bottom of the barrel-shaped filter screen 3. The first support ring 10 and the second support ring 11 are integrally molded. The first support ring 10 and the second support ring 11 can enhance the load-bearing capacity and structural strength of the bottom of the barrel-shaped filter screen 3, effectively avoid the deformation of the barrel-shaped filter screen 3 due to its own weight after storing bolts, and ensure the structural stability of the barrel-shaped filter screen 3 after multiple layers are stacked.

[0039] To further enhance the structural strength of the barrel-shaped filter screen 3, multiple support columns 12 are provided in the side wall of the barrel-shaped filter screen 3. The two ends of the support columns 12 are connected to the first connecting ring 4 and the first support ring 10, respectively. By providing multiple support columns 12, the side wall of the barrel-shaped filter screen 3 is supported at multiple points, preventing the barrel-shaped filter screen 3 from expanding outward after being stacked in multiple layers, thus ensuring the structural stability of the barrel-shaped filter screen 3.

[0040] To improve the ease of bolt removal, the receiving component includes an arc-shaped pull ring 13, with both ends of the pull ring 13 rotatably mounted within the first connecting ring 4. Operators can remove or place the barrel-shaped filter screen 3 from or into the tank 1 using the pull ring 13 without the need for additional tools, making the operation convenient and efficient. Furthermore, the pull ring 13's rotatable design allows it to be rotated into the first connecting ring 4 when multiple layers of the barrel-shaped filter screen 3 are stacked, without affecting the stability of the stacked filter screen 3.

[0041] Example 5

[0042] This embodiment is an improvement on embodiment 2. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figures 5 to 7 As shown, the sealing cap 2 is threadedly connected to the top of the tank body 1. A second annular boss 14 is provided on the inner wall of the tank body 1, and a sealing ring 15 is provided on the threaded end of the sealing cap 2. When the sealing cap 2 is tightened to the tank body 1, the end face of the sealing ring 15 presses against the second annular boss 14. The second annular boss 14 is continuously arranged circumferentially along the inner wall of the tank body 1, and the end face of the sealing ring 15 and the end face of the second annular boss 14 form an end face sealing structure, effectively preventing the leakage of oil and gas inside the tank body 1.

[0043] The device also includes a protective housing 16, inside which the tank 1, pressure control components, and temperature control components are all located. The protective housing 16 is an openable box structure. The top of the protective housing 16 has a water inlet and an air inlet. The heat transfer medium enters the temperature control pipe 8 through the water inlet, and the pipeline of the pressure regulating pump 7 is connected to the air inlet. The bottom of the protective housing 16 has a water outlet for discharging the heat transfer medium. The protective housing 16 provides physical protection for the equipment inside, while also facilitating overall handling and management.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preserving bolts while maintaining residual stress, characterized in that: Includes the following steps: Add oil to a sealed container and immerse the bolts in the oil; The pressure inside the sealed container is controlled within a preset pressure range, and the temperature inside the sealed container is controlled within a preset temperature range. When bolts are needed, adjust the pressure inside the sealed container to atmospheric pressure and adjust the temperature inside the sealed container to room temperature.

2. The bolt preservation method capable of maintaining residual stress according to claim 1, characterized in that: Methods for controlling the pressure inside a sealed container within a preset pressure range and the temperature inside the sealed container within a preset temperature range include: Adjust the pressure inside the sealed container to the pre-set pressure value; Adjust the temperature inside the sealed container to the preset temperature range; Adjust the pressure inside the sealed container from the pre-set pressure value to the preset pressure range.

3. The bolt preservation method according to claim 1, characterized in that: When the pressure inside the sealed container is controlled within a preset pressure range and the temperature inside the sealed container is controlled within a preset temperature range, the pressure is adjusted synchronously according to a preset speed gradient.

4. A bolt preservation device capable of maintaining residual stress, characterized in that: It includes a tank (1) for storing bolts, a removable sealing cap (2) on the top of the tank (1), a pressure control assembly for controlling the pressure inside the tank (1), and a temperature control assembly for controlling the temperature inside the tank (1). The tank (1) is provided with at least one receiving assembly for accommodating bolts. The receiving assembly includes an upward-facing barrel-shaped filter screen (3) and a first connecting ring (4) connected to the top of the barrel-shaped filter screen (3). A second connecting ring (5) is connected to the top of the first connecting ring (4). The first connecting ring (4) and the second connecting ring (5) are coaxially arranged, and the diameter of the second connecting ring (5) is larger than the diameter of the first connecting ring (4). Thus, a first annular boss (6) is formed at the connection between the first connecting ring (4) and the second connecting ring (5). The pressure control assembly includes a pressure regulating pump (7) for adjusting the pressure inside the tank (1); The temperature control assembly includes a temperature control tube (8) for adjusting the temperature inside the tank (1), a heat transfer medium is introduced into the temperature control tube (8), and the temperature control tube (8) is spirally wound around the outer wall of the tank (1).

5. A bolt storage device capable of maintaining residual stress according to claim 4, characterized in that: The pressure control component includes a pressure sensor for detecting the pressure inside the tank (1), and the temperature control component includes a temperature sensor (9) for detecting the temperature inside the tank (1). The pressure regulating pump (7) adjusts the pressure inside the tank (1) according to the detection result of the pressure sensor, and the temperature control tube (8) adjusts the temperature inside the tank (1) according to the detection result of the temperature sensor (9).

6. A bolt storage device capable of maintaining residual stress according to claim 4, characterized in that: The receiving assembly includes a first support ring (10) and a second support ring (11) disposed at the bottom of the barrel-shaped filter (3). The second support ring (11) is connected to the inner side of the first support ring (10), the first support ring (10) is connected to the side wall of the barrel-shaped filter (3), and the second support ring (11) is connected to the bottom of the barrel-shaped filter (3).

7. A bolt storage device capable of maintaining residual stress according to claim 6, characterized in that: The side wall of the barrel-shaped filter (3) is provided with a plurality of support columns (12), and the two ends of the support columns (12) are respectively connected to the first connecting ring (4) and the first support ring (10).

8. A bolt storage device capable of maintaining residual stress according to claim 4, characterized in that: The receiving component includes an arc-shaped pull ring (13), the two ends of which are rotatably disposed within the first connecting ring (4).

9. A bolt storage device capable of maintaining residual stress according to claim 4, characterized in that: The sealing cap (2) is threaded to the top of the tank body (1). A second annular boss (14) is provided on the inner wall of the tank body (1). A sealing ring (15) is provided on the threaded end of the sealing cap (2). When the sealing cap (2) is tightened to the tank body (1), the end face of the sealing ring (15) is pressed against the second annular boss (14).

10. A bolt storage device capable of maintaining residual stress according to claim 4, characterized in that: The device also includes a protective shell (16), and the tank (1), pressure control component and temperature control component are all located inside the protective shell (16).

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