Dual-seal detachable plug and operation method thereof

Abstract

The invention discloses a sealing device technology, and aims to provide a dual-seal detachable plug and an operation method thereof, the key points of the technical scheme are as follows: the dual-seal detachable plug comprises a plug main body, the front end of the plug main body is of a conical structure, the conical surface and the bottom of a leakage detection opening form metal seal, and the circumference of the plug main body is provided with a sealing ring groove for mounting an O-shaped ring; the tail end is of a thin-wall structure and is used for movable riveting after the tail threaded sleeve is installed. The O-shaped ring is arranged on the sealing ring groove and is used for realizing a sealing function between the plug main body and the hole wall of the leakage detection hole; the tail thread sleeve is installed on the tail portion of the plug body and fixed through movable riveting, the thread sleeve can freely rotate but does not fall off, the proper gap and the proper floating amount are achieved, the plug body is allowed to be optimally centered in the installation process, sealing failure generated when the plug body and the leakage detection opening are not concentric is prevented, and abrasion of the sealing face is reduced; the method is suitable for the ocean engineering field.

Description

Technical Field

[0001] The present invention relates to a sealing device technology, and more specifically, to a double-sealed detachable plug and an operating method thereof. Background Art

[0002] The marine engineering field has very high requirements for the reliability of underwater equipment. After the relevant equipment is assembled, its assembly quality needs to be checked. The installation quality of the sealing mechanism is usually checked by helium mass spectrometry leak detection. However, in the marine oil and gas industry, since the relevant standards stipulate that the sealing structure must be composed of at least two channels, in order to detect leaks after assembly, a leak detection hole is usually set between the two seals, and a plug is used to seal after the leak detection is completed. However, the traditional design of the sealing plug uses a single or double O-ring, which is often difficult to ensure long-term and reliable sealing effect in the harsh environment of the deep sea, making the leak detection hole originally used for leak detection become a weak link in the sealing mechanism due to the sealing reliability of the plug. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a double-sealed detachable plug and an operating method thereof.

[0004] To achieve the above object, the present invention provides the following technical solution: a double-sealed detachable plug, comprising:

[0005] Plug body: The front end is a conical structure, and the conical surface forms a metal seal with the bottom of the leak detection hole. The circumference of the plug body is provided with a sealing ring groove for installing an O-ring, and the tail end is a thin-walled structure for active riveting after the tail screw sleeve is installed;

[0006] O-ring: installed on the sealing ring groove to achieve the sealing function between the plug body and the wall of the leak detection port;

[0007] Tail screw sleeve: installed at the tail of the plug body and fixed by active riveting. The screw sleeve can rotate freely but will not fall off. It has appropriate clearance and floating amount, allowing the plug body to be optimally aligned during installation, preventing sealing failure caused by non-concentricity between the plug body and the leak detection port, and reducing wear on the sealing surface.

[0008] The present invention is further configured as follows: the conical surface of the plug body and the conical surface of the bottom of the leak detection port are formed and matched by a stamping tool to achieve metal sealing, thereby avoiding sealing failure caused by temperature difference changes and pressure changes in traditional sealing methods.

[0009] The present invention is further configured as follows: the material of the O-ring is fluororubber, which has excellent high temperature resistance, corrosion resistance, and aging resistance, and is suitable for long-term use in a variety of environments.

[0010] The present invention is further configured as follows: the floating design of the tail screw sleeve has a gap, which can be automatically centered during the installation process to ensure that no uneven force problem occurs when the plug body is installed, thereby ensuring the sealing effect and being able to maintain a stable rotation state after installation and prevent falling off.

[0011] The present invention is further configured as follows: the stamping tool includes two parts: the tail is a hexahedral structure for applying torque, and the front end is a hard material with a hardness ≥ 60HRC for pressing and forming. The conical shape of the bottom of the leak detection port can be accurately controlled by adjusting the stamping torque, thereby ensuring a close fit between the plug body and the bottom of the leak detection port.

[0012] A method for operating a double-sealed detachable plug, characterized in that it comprises the following steps:

[0013] S1. The main body of the plug is manufactured by selecting appropriate materials according to actual needs and forming it through precision casting or forging. The processing of the conical structure is completed by CNC machine tools to ensure accurate dimensions and a smooth and flawless surface;

[0014] S2. Make the O-ring groove and perform precision machining on the circumference of the plug body to ensure that the size of the O-ring groove meets the design requirements;

[0015] S3. Installation of O-rings. Select appropriate O-ring materials according to the actual use environment, including but not limited to fluororubber, and adjust the specifications of the O-rings as needed to ensure that they can be in close contact with the plug body and the wall of the leak detection port;

[0016] S4. Install the tail screw sleeve and put it onto the tail end of the plug body, and ensure that there is an appropriate gap between the tail screw sleeve and the plug body to allow it to rotate freely without falling off;

[0017] S5. Perform active riveting and use a riveting tool to fix the tail screw sleeve to the tail end of the plug body to ensure that the riveting process is stable and the tail screw sleeve can rotate freely after riveting;

[0018] S6. Prepare the stamping tool. According to the shape and size of the bottom of the leak detection hole, select an appropriate stamping tool and ensure that the hardness of the hard material at the front end is ≥ 60HRC, and the tail is designed as a hexahedral structure to apply torque;

[0019] S7. Set the stamping torque. According to the requirements of the bottom of the leak detection hole, adjust the torque applied by the stamping tool to ensure that the cone can be accurately formed to match the cone surface of the plug body;

[0020] S8, perform embossing, insert the embossing tool into the leak detection port, apply torque to emboss, and ensure that the conical surface at the bottom of the leak detection port accurately matches the conical surface of the plug body;

[0021] S9. Check the sealing effect. After the stamping is completed, check whether it is intact to ensure that an effective metal seal is formed between the plug body and the bottom of the leak detection hole;

[0022] S10, final installation, insert the installed plug into the leak detection port for installation, avoid oil or air leakage due to misalignment between the plug and the leak detection port during installation, and after installation, perform overall sealing test to ensure the sealing effect.

[0023] The present invention is further configured as follows: the embossing torque is 20Nm-50Nm, and the specific value is adjusted according to the requirements of the actual application environment to ensure the accuracy of the embossing effect.

[0024] The present invention is further configured such that the ratio of the outer diameter of the O-ring to the inner diameter of the sealing ring groove is 1:1.05-1:1.2, ensuring that the O-ring can be properly compressed during installation, thereby effectively achieving the sealing function and preventing air or liquid leakage.

[0025] The present invention is further configured as follows: in S10, the overall sealing detection includes:

[0026] S101. Preparation:

[0027] Before testing, ensure that the plug has been installed and all accessories have been correctly installed and tightened. At the same time, prepare necessary testing equipment, including but not limited to gas leak detectors and ultrasonic leak detectors. Set the gas leak detection standard to B;

[0028] S102, air tightness test:

[0029] Connect the gas leak detector and ultrasonic leak detector to the sealing surface and start the test. Record the sealing data of the sealing surface through the gas leak detector. At the same time, adjust the ultrasonic leak detector to the appropriate frequency range, test the sealing surface, and obtain the current leakage value A. If A>B, it is judged that the air tightness is unqualified. The operator can capture the ultrasonic signal generated when the gas leaks with the ultrasonic leak detector to accurately determine the leakage location and leakage amount, and then recheck whether the plug is damaged or improperly installed, including but not limited to replacing the O-ring or adjusting the installation position. If A≤B, it is judged that the air tightness is qualified;

[0030] S103. Record and report results:

[0031] Record all test data and judgment results, form a sealing test report and formulate corresponding corrective measures.

[0032] The beneficial effects of the present invention are:

[0033] 1. Compared with the prior art, the double-sealed detachable plug design of the present invention significantly improves the sealing performance by adopting a double sealing structure of a metal cone seal and an O-ring. The conical structure provides a metal contact seal, which can effectively resist the sealing failure caused by temperature differences and pressure changes. When facing temperature differences and pressure fluctuations, traditional sealing methods may cause sealing surface wear or aging of sealing materials, leading to leakage. The present design provides a more reliable and stable sealing effect through the dual coordination of a metal cone seal and an O-ring seal. In addition, the floating design of the tail screw sleeve can help the plug body to automatically align during installation, avoiding the sealing failure problem caused by poor alignment. On the whole, this structure not only improves the sealing performance, but also reduces the frequency of maintenance and replacement, thereby improving the service life and reliability of the product.

[0034] 2. The double-sealed detachable plug of the present invention adopts a metal sealing structure formed and matched by a stamping tool. This design has significant advantages over traditional sealing methods. Traditional sealing methods often rely on O-rings or other sealing materials for sealing. These materials are prone to aging and deformation under high temperature and pressure fluctuations, resulting in sealing failure. Metal seals can effectively cope with temperature differences and pressure changes and have longer durability. The conical surface is precisely formed by the stamping tool to ensure a close fit between the plug body and the bottom of the leak detection port, avoiding oil and gas leakage problems caused by poor sealing. This design improves the sealing accuracy and durability, and greatly improves the reliability and safety of the equipment.

[0035] 3. In the present invention, the use of fluororubber material as the material of the O-ring has obvious advantages. Fluororubber has excellent high temperature resistance, corrosion resistance and aging resistance, and can work stably for a long time in harsh environments. Traditional O-ring materials, such as ordinary rubber or silicone, are prone to aging, expansion or brittle cracking under high temperature or strong acid or alkali environment, resulting in reduced sealing effect and leakage problems. Fluororubber has higher heat resistance and can maintain a stable sealing effect at higher temperatures. In addition, the chemical corrosion resistance of fluororubber enables it to adapt to a variety of harsh working conditions, extend the service life of the seal, reduce the maintenance cost caused by frequent replacement, and improve the stability and safety of the system.

[0036] 4. The present invention has a simple and reasonable structure, is easy to manufacture, and is easy to operate. It avoids the defects of the prior art and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural diagram of the double-sealed detachable plug of the present invention.

[0038] Figure 2 This is a structural diagram of the unriveted plug body in the double-sealed detachable plug of the present invention.

[0039] Figure 3 This is a structural diagram of the stamping tool.

[0040] Figure 1-3 Figure numerals: 1. plug body; 2. O-ring; 3. tail screw sleeve; 4. stamping tool. DETAILED DESCRIPTION

[0041] Reference Figure 1-3 The double-sealed detachable plug and the operating method thereof are further described in the following embodiments.

[0042] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0043] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0044] Figures 1 to 3 A double sealing removable plug is shown, comprising:

[0045] The plug body 1: The front end is a conical structure, and the conical surface forms a metal seal with the bottom of the leak detection hole. The circumference of the plug body 1 is provided with a sealing ring groove for installing the O-ring 2, and the tail end is a thin-walled structure for active riveting after the tail screw sleeve 3 is installed;

[0046] O-ring 2: installed on the sealing ring groove, used to achieve the sealing function between the plug body 1 and the wall of the leak detection port;

[0047] Tail screw sleeve 3: installed at the tail of the plug body 1 and fixed by active riveting. The screw sleeve can rotate freely but will not fall off. It has appropriate clearance and floating amount, allowing the plug body 1 to be optimally aligned during installation, preventing sealing failure caused by non-concentricity between the plug body 1 and the leak detection port, and reducing wear on the sealing surface.

[0048] Compared with the prior art, the double-sealed detachable plug design of the present invention significantly improves the sealing performance by adopting a metal cone seal and an O-ring 2 double sealing structure. The conical structure provides a metal contact seal, which can effectively resist the sealing failure caused by temperature difference and pressure change. The traditional sealing method may cause sealing surface wear or aging of the sealing material when facing temperature difference and pressure fluctuations, resulting in leakage. The present design provides a more reliable and stable sealing effect through the double cooperation of the metal cone seal and the O-ring 2 seal. In addition, the floating design of the tail screw sleeve 3 can help the plug body 1 to automatically center during installation, avoiding the sealing failure problem caused by poor centering. On the whole, this structure not only improves the sealing performance, but also reduces the maintenance and replacement frequency, thereby improving the service life and reliability of the product, and the present invention is detachable and reusable, without affecting its sealing performance. The present invention can be applied to a working water depth of ≥3000m, an operating temperature of -10℃~+50℃, and a design life of up to 25 years.

[0049] The conical surface of the plug body 1 and the conical surface of the bottom of the leak detection port are formed and matched by a stamping tool 4 to achieve metal sealing, thereby avoiding sealing failure caused by temperature difference and pressure change in traditional sealing methods;

[0050] The double-sealed detachable plug of the present invention adopts a metal sealing structure formed and matched by a stamping tool 4. This design has significant advantages over traditional sealing methods. Traditional sealing methods often rely on O-rings 2 or other sealing materials for sealing. These materials are prone to aging and deformation under high temperature and pressure fluctuations, resulting in sealing failure. Metal seals can effectively cope with temperature differences and pressure changes and have longer durability. The conical surface is accurately formed by the stamping tool 4 to ensure a close fit between the plug body 1 and the bottom of the leak detection port, avoiding oil and gas leakage problems caused by poor sealing. This design improves sealing accuracy and durability, and greatly improves the reliability and safety of the equipment.

[0051] The material of the O-ring 2 is fluororubber, which has excellent high temperature resistance, corrosion resistance, and aging resistance, and is suitable for long-term use in a variety of environments;

[0052] Using fluororubber as the material of the O-ring 2 has obvious advantages. Fluororubber has excellent high temperature resistance, corrosion resistance and aging resistance, and can work stably for a long time in harsh environments. Traditional O-ring 2 materials, such as ordinary rubber or silicone, are prone to aging, expansion or brittle cracking in high temperature or strong acid or alkali environments, resulting in a decrease in sealing effect and leakage problems. Fluororubber has higher heat resistance and can maintain a stable sealing effect at higher temperatures. In addition, the chemical corrosion resistance of fluororubber enables it to adapt to a variety of harsh working conditions, extend the service life of seals, reduce maintenance costs due to frequent replacement, and improve the stability and safety of the system.

[0053] The floating design of the tail screw sleeve 3 has a gap, which can be automatically centered during the installation process, ensuring that there will be no uneven force problem when the plug body 1 is installed, thereby ensuring the sealing effect and being able to maintain a stable rotation state after installation and prevent falling off;

[0054] The floating design of the tail screw sleeve 3 has a gap, which can achieve automatic centering during the installation process. This design greatly improves the accuracy of the plug installation process. During the installation of traditional sealing devices, if the plug and the leak detection port are not aligned, it may cause uneven pressure on the sealing surface, thereby causing leakage problems. The present invention uses a floating structure to automatically adjust the alignment during installation to ensure that the plug body 1 can accurately match the leak detection port, avoiding sealing failure due to improper installation. In addition, this floating design reduces the wear between the sealing surfaces, thereby improving the sealing effect and service life, and ensuring the long-term stable operation of the plug.

[0055] The stamping tool 4 includes two parts: the tail is a hexahedral structure for applying torque, and the front end is a hard material with a hardness of ≥ 60HRC for pressing and forming. The cone shape of the bottom of the leak detection hole can be accurately controlled by adjusting the stamping torque, thereby ensuring a close fit between the plug body 1 and the bottom of the leak detection hole;

[0056] The front end of the stamping tool 4 is made of hard material, which can ensure high precision and durability during the molding process, thereby achieving a close fit between the plug body 1 and the bottom of the leak detection port. By adjusting the applied torque, the cone shape can be precisely controlled to ensure that the plug body 1 fits perfectly with the bottom of the leak detection port, which is crucial for metal sealing. Traditional sealing methods often have problems such as loose sealing or deformation of the sealing surface, and the stamping tool 4 can effectively solve these problems. Using this tool for stamping not only improves the sealing, but also ensures the accuracy of the entire installation process, further reducing the risk of leakage problems in the equipment and improving the stability of the sealing effect.

[0057] A method for operating a double-sealed detachable plug, characterized in that it comprises the following steps:

[0058] S1. The plug body 1 is manufactured by selecting appropriate materials according to actual needs and forming it through precision casting or forging process. The processing of the conical structure is completed by CNC machine tools to ensure accurate size and smooth and flawless surface;

[0059] S2. Make the O-ring 2 grooves and perform precision machining on the circumference of the plug body 1 to ensure that the size of the O-ring 2 grooves meets the design requirements;

[0060] S3. Installation of the O-ring 2. Select appropriate O-ring 2 material according to the actual use environment, including but not limited to fluororubber, and adjust the specifications of the O-ring 2 as needed to ensure that it can be in close contact with the plug body 1 and the wall of the leak detection port;

[0061] S4, install the tail screw sleeve 3, and put the tail screw sleeve 3 onto the tail end of the plug body 1, and ensure that there is an appropriate gap between the tail screw sleeve 3 and the plug body 1 to allow it to rotate freely without falling off;

[0062] S5, perform active riveting, use a riveting tool to fix the tail screw sleeve 3 to the tail end of the plug body 1, ensure that the riveting process is stable and the tail screw sleeve 3 can rotate freely after riveting;

[0063] S6. Prepare the stamping tool 4. According to the shape and size of the bottom of the leak detection hole, select an appropriate stamping tool 4, and ensure that the hardness of the hard material at the front end is ≥ 60HRC, and the tail is designed as a hexahedral structure to apply torque;

[0064] S7, setting the stamping torque, adjusting the torque applied by the stamping tool 4 according to the requirements of the bottom of the leak detection hole, to ensure that a cone that matches the conical surface of the plug body 1 can be accurately formed;

[0065] S8, perform embossing, insert the embossing tool 4 into the leak detection port, apply torque to perform embossing, and ensure that the conical surface at the bottom of the leak detection port accurately matches the conical surface of the plug body 1;

[0066] S9, check the sealing effect. After the stamping is completed, check whether it is intact to ensure that an effective metal seal is formed between the plug body 1 and the bottom of the leak detection hole;

[0067] S10, final installation, insert the installed plug into the leak detection port for installation, avoid oil or air leakage caused by misalignment between the plug and the leak detection port during installation, and perform overall sealing test after installation to ensure the sealing effect;

[0068] The operating method of the double-sealed detachable plug ensures that the manufacturing, installation and testing processes of the plug meet high standards through a series of precise steps. The specific steps include precise machining, correct selection and installation of the O-ring 2, accurate installation of the tail screw sleeve 3 and fine control of the embossing molding. Each link plays a role in ensuring the sealing performance of the plug, especially in steps S6 to S10. The detailed operating process ensures the accuracy and quality of each link, thereby ensuring the final installation effect and sealing performance. The standardization and standardization of the operating methods can effectively reduce human errors, improve production efficiency, and ensure the stability and consistency of product quality.

[0069] The embossing torque is 20Nm-50Nm, and the specific value is adjusted according to the requirements of the actual application environment to ensure the accuracy of the embossing effect;

[0070] The stamping torque is set in the range of 20Nm-50Nm, which can be flexibly adjusted according to the requirements of the actual application environment. This not only ensures that the torque applied by the stamping tool 4 has sufficient accuracy, but also avoids poor stamping effect caused by excessive or too small torque. Under high pressure or high temperature environment, the sealing surface may require a higher stamping torque to ensure the sealing effect, while under normal environment, it does not require too much torque. By precisely controlling the stamping torque, the plug body 1 can be perfectly matched with the bottom of the leak detection port, thereby improving the stability of the seal and ensuring the long-term stable operation of the equipment. This design can flexibly adapt to a variety of working conditions and improve the applicability and reliability of the sealing device.

[0071] The ratio of the outer diameter of the O-ring 2 to the inner diameter of the sealing ring groove is 1:1.05-1:1.2, ensuring that the O-ring 2 can be properly compressed during installation, thereby effectively achieving the sealing function and preventing air or liquid leakage;

[0072] The ratio of the outer diameter of the O-ring 2 to the inner diameter of the sealing ring groove is designed to be 1:1.05-1:1.2. This ratio design ensures that the O-ring 2 can be properly compressed during the installation process. Proper compression can ensure close contact between the O-ring 2 and the plug body 1 and the wall of the leak detection port, thereby improving the sealing effect. If the O-ring 2 is compressed too little, the sealing effect may not be fully exerted, resulting in gas or liquid leakage; excessive compression may cause damage or failure of the O-ring 2. Therefore, the preferred ratio is 1:1.05-1:1.2, which can not only ensure the stability of the sealing effect, but also prevent damage to the seal, thereby improving reliability and service life.

[0073] In S10, the overall sealing detection includes:

[0074] S101. Preparation:

[0075] Before testing, ensure that the plug has been installed and all accessories have been correctly installed and tightened. At the same time, prepare necessary testing equipment, including but not limited to gas leak detectors and ultrasonic leak detectors. Set the gas leak detection standard to B;

[0076] S102, air tightness test:

[0077] Connect the gas leak detector and the ultrasonic leak detector to the sealing surface and start the test. Record the sealing data of the sealing surface through the gas leak detector. At the same time, adjust the ultrasonic leak detector to an appropriate frequency range, test the sealing surface, and obtain the current leakage value A. If A>B, it is judged that the air tightness is unqualified. The operator can capture the ultrasonic signal generated when the gas leaks with the ultrasonic leak detector to accurately determine the leakage position and leakage amount, and then recheck whether the plug is damaged or improperly installed, including but not limited to replacing the O-ring 2 or adjusting the installation position. If A≤B, it is judged that the air tightness is qualified;

[0078] S103. Record and report results:

[0079] Record all test data and judgment results, form a sealing test report and formulate corresponding corrective measures;

[0080] By ensuring that all accessories are correctly installed and tightened before testing, including the installation of the plug, the risk of unqualified sealing caused by improper installation or accessory problems is fully eliminated. In addition, the dual detection method of gas leak detector and ultrasonic leak detector can comprehensively and accurately check the sealing surface to ensure that there is no leakage. The gas leak detector is mainly used to monitor the airtightness data in real time, while the ultrasonic leak detector helps the operator locate the leakage point and leakage amount by capturing the ultrasonic signal generated when the leakage occurs, making the detection process more accurate and efficient; once the airtightness is found to be unqualified, the operator can promptly locate the leakage source according to the signal provided by the ultrasonic detector, so as to accurately determine the leakage location and leakage amount, which will help to take timely measures to adjust or replace the corresponding components in the future, and avoid the risk of system failure or leakage caused by sealing problems; this method not only improves the accuracy of detection, but also provides a clear basis for subsequent rectification.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sealed detachable plug, characterized in that: include: The plug body (1) has a conical structure at its front end, and the conical surface forms a metal seal with the bottom of the leak detection hole. A sealing ring groove for installing an O-ring (2) is provided on the circumference of the plug body (1). The tail end has a thin-walled structure for active riveting after the tail screw sleeve (3) is installed. O-ring (2): installed on the sealing ring groove, used to achieve the sealing function between the plug body (1) and the wall of the leak detection port; Tail screw sleeve (3): installed at the tail of the plug body (1) and fixed by active riveting. The screw sleeve can rotate freely but will not fall off. It has appropriate clearance and floating amount, allowing the plug body (1) to be optimally aligned during installation, preventing sealing failure caused by the non-concentricity of the plug body (1) and the leak detection port, and reducing wear on the sealing surface.

2. A double-sealed detachable plug according to claim 1, characterized in that: The conical surface of the plug body (1) and the conical surface of the bottom of the leak detection port are formed and matched by a stamping tool (4) to achieve metal sealing, thereby avoiding sealing failure caused by temperature difference changes and pressure changes in traditional sealing methods.

3. A double-sealed detachable plug according to claim 1, characterized in that: The material of the O-ring (2) is fluororubber, which has excellent high temperature resistance, corrosion resistance and aging resistance and is suitable for long-term use in various environments.

4. A double-sealed detachable plug according to claim 1, characterized in that: The floating design of the tail screw sleeve (3) has a gap, which can be automatically centered during the installation process, ensuring that there will be no problem of uneven force when the plug body (1) is installed, thereby ensuring the sealing effect and being able to maintain a stable rotation state after installation and prevent falling off.

5. A double-sealed detachable plug according to claim 2, characterized in that: The stamping tool (4) comprises two parts: the tail part is a hexahedral structure for applying torque, and the front end is a hard material with a hardness of ≥60HRC for pressing and forming. The conical shape of the bottom of the leak detection hole can be accurately controlled by adjusting the stamping torque, thereby ensuring a tight fit between the plug body (1) and the bottom of the leak detection hole.

6. An operating method applicable to the double-sealed detachable plug according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. The plug body (1) is manufactured by selecting suitable materials according to actual needs and forming it through precision casting or forging. The processing of the conical structure is completed by CNC machine tools to ensure accurate dimensions and a smooth and flawless surface. S2. Make an O-ring (2) groove and perform precision machining on the circumference of the plug body (1) to ensure that the size of the O-ring (2) groove meets the design requirements; S3, installing the O-ring (2), selecting a suitable material for the O-ring (2) according to the actual use environment, including but not limited to fluororubber, and adjusting the specifications of the O-ring (2) as needed to ensure that it can be in close contact with the plug body (1) and the wall of the leak detection port; S4, install the tail screw sleeve (3), and put the tail screw sleeve (3) onto the tail end of the plug body (1), and ensure that there is an appropriate gap between the tail screw sleeve (3) and the plug body (1) to allow it to rotate freely without falling off; S5, performing active riveting, using a riveting tool to fix the tail screw sleeve (3) to the tail end of the plug body (1), ensuring that the riveting process is stable and the tail screw sleeve (3) can rotate freely after riveting; S6. Prepare a stamping tool (4). Select an appropriate stamping tool (4) according to the shape and size of the bottom of the leak detection hole, and ensure that the hardness of the hard material at the front end is ≥ 60HRC, and the tail is designed to be a hexahedral structure to apply torque; S7, setting the stamping torque, adjusting the torque applied by the stamping tool (4) according to the requirements of the bottom of the leak detection hole, to ensure that a cone that matches the conical surface of the plug body (1) can be accurately formed; S8, performing embossing, inserting the embossing tool (4) into the leak detection port, applying a torque to perform embossing, and ensuring that the conical surface at the bottom of the leak detection port accurately matches the conical surface of the plug body (1); S9, testing the sealing effect, after the stamping is completed, checking whether it is intact, to ensure that an effective metal seal is formed between the plug body (1) and the bottom of the leak detection hole; S10, final installation, insert the installed plug into the leak detection port for installation, avoid oil or air leakage due to misalignment between the plug and the leak detection port during installation, and after installation, perform an overall sealing test to ensure the sealing effect.

7. The operating method of the double-sealed detachable plug according to claim 6, characterized in that: The embossing torque is 20Nm-50Nm, and the specific value is adjusted according to the requirements of the actual application environment to ensure the accuracy of the embossing effect.

8. The operating method of the double-sealed detachable plug according to claim 6, characterized in that: The ratio of the outer diameter of the O-ring (2) to the inner diameter of the sealing ring groove is 1:1.05-1:1.2, ensuring that the O-ring (2) can be properly compressed during installation, thereby effectively achieving the sealing function and preventing air or liquid leakage.

9. The operating method of the double-sealed detachable plug according to claim 6, characterized in that: In S10, the overall sealing detection includes: S101. Preparation: Before testing, ensure that the plug has been installed and all accessories have been correctly installed and tightened. At the same time, prepare necessary testing equipment, including but not limited to gas leak detectors and ultrasonic leak detectors. Set the gas leak detection standard to B; S102, air tightness test: Connect a gas leak detector and an ultrasonic leak detector to the sealing surface and start the test. Record the sealing data of the sealing surface through the gas leak detector. Adjust the ultrasonic leak detector to an appropriate frequency range and test the sealing surface to obtain the current leakage value A. If A>B, it is determined that the air tightness is unqualified. The operator can capture the ultrasonic signal generated when the gas leaks with the ultrasonic leak detector to accurately determine the leakage position and leakage amount. Then recheck whether the plug is damaged or improperly installed, including but not limited to replacing the O-ring (2) or adjusting the installation position. If A≤B, it is determined that the air tightness is qualified. S103. Record and report results: Record all test data and judgment results, form a sealing test report and formulate corresponding corrective measures.

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