A metal sealing device capable of autonomous sealing

Abstract

The application discloses a metal sealing device capable of being sealed autonomously, which comprises a lower main part, a clamping block accommodating annular groove coaxially arranged on the outer wall of the middle part of the lower main part, an upper main part, the lower end of which is connected with the upper end of the lower main part, a metal sealing part accommodating annular groove formed after the upper main part is connected with the lower main part, a metal sealing part arranged in the metal sealing part accommodating annular groove, a connecting part coaxially arranged on the outer side of the upper main part and the lower main part and fixedly connected with the upper main part, a plurality of driving bolts uniformly distributed along the circumference of the connecting part and rotationally arranged in the inner part of the connecting part, each driving bolt being arranged radially along the connecting part, a plurality of clamping blocks slidingly arranged in the lower part of the connecting part along the radial direction of the connecting part, one side of each clamping block being rotationally connected with a driving bolt and the other side being matchingly connected with the clamping block accommodating annular groove, a test interface arranged on the outer wall of the upper main part, and a test channel arranged in the inner part of the upper main part, one end of the test channel being in communication with the test interface and the other end being in communication with the metal sealing part accommodating annular groove.

Description

Technical Field

[0001] This invention belongs to the field of marine oil and gas exploration and development technology, and specifically relates to a metal sealing device capable of self-sealing. Background Technology

[0002] In the field of offshore oil and gas exploration and development, metal sealing structures are commonly used to ensure the sealing performance and operational reliability of equipment. While most metal seals adhere to industry standards, some equipment cannot directly use these standards, requiring equipment manufacturers to design their own metal sealing structures. Conventional metal sealing structures typically involve bolted connections between two main components. The tension of the bolts pulls the two components together, simultaneously compressing the metal seal between them to achieve a seal. However, some equipment lacks the space for bolt installation, especially on offshore oil and gas platforms. Due to space constraints, these platforms require miniaturization and lightweight design, making conventional bolt-pressed metal seals unsuitable. Summary of the Invention

[0003] The purpose of this invention is to provide a self-sealing metal sealing device that can achieve high-pressure or ultra-high-pressure sealing, and has self-locking pressure holding and sealing detection functions after installation.

[0004] The technical solution provided by this invention is as follows:

[0005] A self-sealing metal sealing device, comprising:

[0006] Main component;

[0007] The retaining block receives an annular groove, which is coaxially disposed on the outer wall of the middle part of the lower main component;

[0008] The upper main component has its lower end connected to the upper end of the lower main component;

[0009] The metal seal includes an annular groove, which is formed by connecting the upper main component and the lower main component.

[0010] A metal seal, which is disposed in a metal seal receiving annular groove;

[0011] A connector is coaxially disposed on the outside of the upper main component and the lower main component, and is fixedly connected to the upper main component;

[0012] Multiple drive bolts are evenly distributed along the circumference of the connector and are rotatably disposed inside the connector; each drive bolt is arranged radially along the connector.

[0013] Multiple locking blocks are evenly distributed along the circumference of the connector and slidably disposed at the lower part of the connector; each locking block is radially disposed along the connector; each locking block corresponds to a driving bolt; one side of each locking block is rotatably connected to the driving bolt, and the other side is matched and connected to the locking block receiving annular groove.

[0014] A test interface is located on the outer wall of the upper main component;

[0015] The test channel is located inside the upper main component, with one end connected to the test interface and the other end connected to the metal seal receiving annular groove.

[0016] Preferably, the card block receiving annular groove includes:

[0017] The first V-shaped annular groove, with its opening facing outward, is coaxially disposed on the outer wall of the lower main body.

[0018] The second V-shaped annular groove has an outward opening and is coaxially disposed on the outer wall of the lower main body; the second V-shaped annular groove is disposed below the first V-shaped annular groove.

[0019] Preferably, the card block includes:

[0020] A first V-shaped protrusion is disposed on one side of the card block; the first V-shaped protrusion is matched and connected with the first V-shaped annular groove.

[0021] The second V-shaped protrusion is disposed on the same side as the first V-shaped protrusion; the second V-shaped protrusion is disposed below the first V-shaped protrusion.

[0022] A drive bolt connection slot is located on the other side of the clamp block.

[0023] Preferably, it also includes:

[0024] Multiple drive bolt operating holes are evenly distributed along the circumference of the connector and are located on the outer wall of the lower part of the connector;

[0025] Multiple drive bolt receiving holes are arranged radially inside the connector; the drive bolt receiving holes are through holes with threads on their inner walls.

[0026] The driving bolt, the driving bolt receiving hole, and the driving bolt operating hole shall be provided in a specific configuration. The driving bolt is rotatably disposed in the corresponding driving bolt receiving hole, the operating end is disposed in the corresponding driving bolt operating hole, and the other end is rotatably disposed in the corresponding driving bolt connecting groove.

[0027] Preferably, it also includes:

[0028] A connecting channel is provided on the metal seal along its axial direction; the connecting channel can connect the sealing spaces above and below the metal seal.

[0029] Preferably, it also includes:

[0030] A retaining ring groove is coaxially disposed on the outer wall of the middle part of the upper main component;

[0031] A retaining ring is disposed within the retaining ring groove; the lower surface of the retaining ring contacts the connector.

[0032] Multiple fixing bolt through holes are evenly distributed along the circumference of the retaining ring and are provided on the retaining ring; each fixing bolt through hole is provided along the axial direction of the retaining ring;

[0033] Multiple fixing bolt connection slots are evenly distributed along the circumference of the connector and are located at the upper end of the connector;

[0034] Multiple fixing bolts are provided, each corresponding to a fixing bolt through hole and a fixing bolt connecting groove, and are threadedly connected to the fixing bolt connecting groove.

[0035] Preferably, it also includes:

[0036] The first sealing groove is coaxially disposed at the upper end of the outer side of the metal sealing element;

[0037] The second sealing groove is coaxially disposed at the lower end of the outer side of the metal seal.

[0038] Preferably, it also includes:

[0039] A first sealing ring is disposed between the upper main component and the connecting component;

[0040] The second sealing ring and the third sealing ring are disposed between the lower main component and the connecting component; the second sealing ring and the third sealing ring are respectively disposed at the upper end and the lower end of the lower main component;

[0041] The fourth sealing ring is disposed within the sealing groove of the first sealing element and between the upper main component and the metal sealing element;

[0042] The fifth sealing ring is disposed within the sealing groove of the second sealing element, between the lower main component and the metal sealing element.

[0043] The beneficial effects of the present invention are: the metal sealing device provided by the present invention can achieve high pressure and ultra-high pressure sealing by relying on the self-extrusion of the structural body, and has the ability to pre-tighten and self-lock, long-term pressure holding capability and sealing detection function after installation. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the self-sealing metal sealing device described in this invention.

[0045] Reference numerals: Upper main body 111, first connecting part 112, second connecting part 113, third connecting part 114, fourth connecting part 115, test interface 121, test channel 122; Upper body of connector 211, lower body of connector 212, first V-shaped protrusion 221, second V-shaped protrusion 222, drive bolt connecting groove 223, locking block limiting hole 230, drive bolt 240, drive bolt operating hole 251, drive bolt receiving hole 252; Lower main body 311, lower main body connecting part 312, first V-shaped annular groove 321, second V-shaped annular groove 322; Metal seal 410, communicating channel 420; Snap ring 510, fixing bolt 520; First sealing ring 611, second sealing ring 612, third sealing ring 613, fourth sealing ring 614, fifth sealing ring 615. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0047] like Figure 1 As shown, the present invention provides a self-sealing metal sealing device, and the specific implementation process is as follows:

[0048] The lower main component includes: a lower main component body 311, which is a hollow cylinder with a first circular through hole coaxially arranged inside; and a lower main component connecting part 312, which is a hollow cylinder with an inverted frustum-shaped through hole coaxially arranged inside; the lower main component connecting part 312 is coaxially arranged with the lower main component body 311 and fixedly connected to the upper end of the lower main component body 311; wherein, the diameter of the upper bottom of the inverted frustum-shaped through hole is the same as the diameter of the first circular through hole; the outer diameter of the lower main component body 311 is the same as the outer diameter of the lower main component connecting part 312. The inner wall of the lower main component connecting part 312 is also referred to as the sealing surface of the lower main component.

[0049] A retaining ring groove is coaxially disposed on the outer wall of the lower main component body 311. The retaining ring groove includes: a first V-shaped ring groove 321, with its opening facing outwards, coaxially disposed on the outer wall of the lower main component body 311; the upper inner wall of the first V-shaped ring groove 321 is also referred to as the upper compression surface of the retaining ring groove. A second V-shaped ring groove 322, with its opening facing outwards, is coaxially disposed on the outer wall of the lower main component body 311; the second V-shaped ring groove 322 is disposed below the first V-shaped ring groove 321; the upper inner wall of the second V-shaped ring groove 322 is also referred to as the lower compression surface of the retaining ring groove.

[0050] The upper main component includes: an upper main component body 111, which is a hollow cylinder with a second circular through hole coaxially arranged inside; and an upper main component connecting part, which is coaxially arranged with the upper main component body 111 and fixedly connected to the lower end of the upper main component body 111; the upper main component connecting part includes: a first connecting part 112, which is a hollow frustum with a third circular through hole coaxially arranged inside; the first connecting part 112 is coaxially arranged with the upper main component body 111; the upper end of the first connecting part 112 is fixedly connected to the lower end of the upper main component body 111; and a second connecting part 113, which is a hollow cylinder with a fourth circular through hole coaxially arranged inside. The second connecting part 113 has threads on its outer wall; the second connecting part 113 is coaxially arranged with the first connecting part 112; the upper end of the second connecting part 113 is fixedly connected to the lower end of the first connecting part 112; the third connecting part 114 is a hollow cylinder with a frustum-shaped through hole coaxially arranged inside; the outer wall of the third connecting part 114 has threads; the third connecting part 114 is coaxially arranged with the second connecting part 113; the upper end of the third connecting part 114 is fixedly connected to the lower end of the second connecting part 113. The lower end is fixedly connected; the inner wall of the third connecting part 114 is also called the sealing surface of the upper main component; the fourth connecting part 115 is a hollow cylinder with a fifth circular through hole coaxially arranged inside; the outer wall of the fourth connecting part 115 is threaded; the fourth connecting part 115 is coaxially arranged with the third connecting part 114; the upper end of the fourth connecting part 115 is fixedly connected to the lower end of the third connecting part 114; the lower end of the fourth connecting part 115 contacts the upper end of the lower main component connecting part 312; wherein, The diameters of the third circular through hole, the fourth circular through hole, and the upper base of the frustum-shaped through hole are all the same as the diameter of the second circular through hole; the diameter of the fifth circular through hole is larger than the diameter of the lower base of the frustum-shaped through hole; the outer diameter of the upper base of the first connecting part 112 is the same as the outer diameter of the upper main body 111; the outer diameters of the second connecting part 113, the third connecting part 114, and the fourth connecting part 115 are all the same as the outer diameter of the lower base of the first connecting part 112.

[0051] A test interface 121 is disposed on the outer wall of the first connecting portion 112. The test interface 121 is used to connect external testing equipment and provides a connection port for sealing testing.

[0052] The retaining ring groove is coaxially disposed on the outer wall of the second connecting part 113.

[0053] The first sealing ring groove is coaxially disposed on the outer wall of the second connecting part 113; the first sealing ring groove is disposed below the retaining ring groove.

[0054] The metal seal includes an annular groove, which is coaxially disposed on the inner wall of the lower end of the upper main component connecting part; it is formed by the connection of the third connecting part 114, the fourth connecting part 115 and the lower main component connecting part 312.

[0055] The test channel 122 has one end connected to the test interface 121 and the other end connected to the metal seal receiving annular groove.

[0056] A retaining ring 510 is disposed in the retaining ring groove to prevent axial movement of the connector and lock the relative position of the upper main component and the connector.

[0057] Multiple fixing bolt through holes are evenly distributed along the circumference of the retaining ring 510 and are disposed on the retaining ring 510; each fixing bolt through hole is disposed along the axial direction of the retaining ring 510.

[0058] A connector is coaxially sleeved on the outside of the upper main component and the lower main component. The connector includes: an upper body 211, which is a hollow cylinder with a sixth circular through hole coaxially arranged inside; the inner wall of the upper body 211 is threaded; the upper body 211 is coaxially sleeved on the outside of the second connecting part 113; the diameter of the sixth circular through hole is the same as the outer diameter of the second connecting part 113; the upper body 211 is threadedly connected to the second connecting part 113, so that the connector is coaxially sleeved on the outside of the upper main component and fixedly connected to the upper main component; the upper end of the upper body 211 contacts the retaining ring 510, and the retaining ring 510 limits the upper body 211 to prevent relative loosening between the connector and the upper main component. The lower body 212 of the connector is a hollow cylinder with a seventh circular through hole coaxially arranged inside; the lower body 212 of the connector is coaxially sleeved on the outside of the lower main component; the diameter of the seventh circular through hole is smaller than the diameter of the sixth circular through hole; the diameter of the seventh circular through hole is the same as the outer diameter of the lower main component.

[0059] Multiple fixing bolt connection slots are evenly distributed along the circumference of the upper body 211 of the connector and are located at the upper end of the upper body 211 of the connector; each fixing bolt connection slot is arranged along the axial direction of the upper body 211 of the connector; the fixing bolt connection slots correspond one-to-one with the fixing bolt through holes; the inner wall of the fixing bolt connection slot is provided with threads.

[0060] Multiple fixing bolts 520 are evenly distributed along the circumference of the upper body 211 of the connector, and are set one-to-one with the fixing bolt through holes and fixing bolt connecting grooves. They are set in the corresponding fixing bolt through holes and the corresponding fixing bolt connecting grooves and are threadedly connected to the fixing bolt connecting grooves. The fixing bolts 520 cooperate with the retaining rings 510 to fix the relative position of the connector and the upper main component.

[0061] The second sealing ring groove is coaxially disposed on the inner wall of the upper end of the lower body 212 of the connector.

[0062] The third sealing ring groove is coaxially disposed on the inner wall of the lower end of the lower body 212 of the connector.

[0063] Multiple locking holes 230 are evenly distributed along the circumference of the lower body 212 of the connector and are disposed on the inner wall of the middle part of the lower body 212 of the connector; the locking holes 230 can restrict the movement direction of the locking block and ensure that the locking block moves only along the radial direction of the connector.

[0064] Multiple locking blocks are evenly distributed along the circumference of the lower body 212 of the connector, corresponding one-to-one with the locking block limiting holes 230, and slidably disposed in the corresponding locking block limiting holes 230. Each locking block serves as a force transmission component, cooperating with the locking block receiving annular groove to convert radial compressive force into axial tensile force. Each locking block includes: a first V-shaped protrusion 221 disposed on one side of the locking block; the first V-shaped protrusion 221 is matched and connected to the first V-shaped annular groove 321; the upper outer wall of the first V-shaped protrusion 221, also known as the upper extrusion slope of the locking block, cooperates with the upper compression surface of the locking block receiving annular groove to transmit extrusive force. The second V-shaped protrusion 222 is disposed on the same side as the first V-shaped protrusion 221; the second V-shaped protrusion 222 is disposed below the first V-shaped protrusion 221; the second V-shaped protrusion 222 is matched and connected to the second V-shaped annular groove 322; the upper outer wall of the second V-shaped protrusion 222 is also called the lower extrusion slope of the block, which cooperates with the lower compression surface of the block receiving annular groove to assist in transmitting the extrusion force. A drive bolt connecting groove 223 is disposed on the other side of the block.

[0065] Multiple drive bolt operating holes 251 are evenly distributed along the circumference of the lower body 212 of the connector and are set on the outer wall of the middle part of the lower body 212 of the connector; the drive bolt operating holes 251 are set one-to-one with the locking block limiting holes 230; the drive bolt operating holes 251 are used to insert special tools to operate the drive bolts 240 to rotate.

[0066] Multiple drive bolt receiving holes 252 are evenly distributed along the circumference of the lower body 212 of the connector and are radially disposed inside the lower body 212 of the connector. Each drive bolt receiving hole 252 is a through hole with a threaded inner wall. Each drive bolt receiving hole 252 corresponds to a drive bolt operating hole 251 and a locking block limiting hole 230. One end of each drive bolt receiving hole 252 communicates with the corresponding drive bolt operating hole 251, and the other end communicates with the corresponding locking block limiting annular groove. Each drive bolt receiving hole 252 is used to install the drive bolt 240 and provides guidance for the movement of the drive bolt 240.

[0067] Multiple drive bolts 240 are evenly distributed along the circumference of the lower body 212 of the connector, corresponding one-to-one with the drive bolt receiving hole 252, the drive bolt operating hole 251, and the locking block. Each drive bolt is rotatably disposed in the corresponding drive bolt receiving hole 252 and threadedly connected to it, providing pre-tightening and self-locking functions to ensure that the metal seal 410 will not loosen during the entire operation, thus preventing loss of sealing. The operating end of each drive bolt 240 is disposed in the corresponding drive bolt operating hole 251, and the other end is rotatably connected to the drive bolt connecting groove 223 of the locking block. Rotating the operating end of the drive bolt 240 drives the drive bolt 240 to move axially along the drive bolt receiving hole 252, pushing the locking block radially towards the lower body 212 of the connector, thereby matching and connecting the locking block with the locking block receiving annular groove on the outer wall of the lower main body 311.

[0068] A metal seal 410 is coaxially disposed within the metal seal receiving annular groove, conforming to the shape of the groove. As a core sealing component, the metal seal 410, when compressed, achieves a high-pressure seal between the upper and lower main components. The material properties of the metal seal 410 are selected to accommodate a suitable compression amount. After the fourth connecting part 115 contacts the upper end of the lower main component connecting part 312, the formed metal seal receiving annular groove can limit the metal seal 410, preventing premature damage due to excessive compression. The upper outer wall of the metal seal 410 is also referred to as the upper sealing surface, and the lower outer wall is also referred to as the lower sealing surface.

[0069] The first sealing element has a sealing ring groove, which is coaxially disposed at the upper end of the outer side of the metal sealing element 410.

[0070] The second sealing element has a sealing ring groove, which is coaxially disposed at the lower end of the outer side of the metal sealing element 410.

[0071] A connecting channel 420 is provided on the metal seal 410 along the axial direction of the metal seal 410; the connecting channel 420 is used to connect the sealing spaces above and below the metal seal 410 to achieve unified sealing detection.

[0072] The first sealing ring 611 is disposed in the first sealing ring groove; the first sealing ring 611 is disposed between the upper main component and the connecting component to assist in the sealing and dust prevention of the upper main component and the connecting component.

[0073] The second sealing ring 612 is disposed in the second sealing ring groove; the second sealing ring 612 is disposed between the lower main component and the connecting component to assist in sealing the upper end of the lower main component with the connecting component.

[0074] The third sealing ring 613 is disposed in the third sealing ring groove; the third sealing ring 613 is disposed between the lower main component and the connecting component to assist in the sealing between the lower part of the lower main component and the connecting component.

[0075] The fourth sealing ring 614 is disposed in the sealing ring groove of the first sealing element; the fourth sealing ring 614 is disposed between the upper main component and the metal sealing element 410 to assist in the sealing between the upper main component and the metal sealing element 410.

[0076] The fifth sealing ring is disposed within the sealing ring groove of the second sealing element; the fifth sealing ring is disposed between the lower main component and the metal sealing element 410 to assist in the sealing between the lower main component and the metal sealing element 410.

[0077] In this embodiment, the first sealing ring 611, the second sealing ring 612, the third sealing ring 613, the fourth sealing ring 614, and the fifth sealing ring are all rubber sealing rings; the rubber sealing rings have good elasticity and sealing performance, and are suitable for auxiliary sealing and dust prevention requirements.

[0078] This invention provides a self-sealing metal sealing device, with the following operating steps: Step 1: After connecting the driving bolt 240 to the locking block, the driving bolt 240 passes through the driving bolt receiving hole 252, with the operating end of the driving bolt 240 placed in the driving bolt operating hole 251, and the locking block placed in the locking block limiting hole. Step 2: The connecting member is coaxially sleeved on the outside of the upper main component, and the connecting member is fixedly connected to the outside of the upper main component through the threaded connection between the upper body 211 of the connecting member and the second connecting part 113; the first sealing ring 611 is installed in the first sealing ring groove. Step 3: The retaining ring 510 is installed in the retaining ring groove; the fixing bolt 520 passes through the fixing bolt through hole and is threadedly connected to the fixing bolt connecting groove, using the cooperation of the retaining ring 510 and the fixing bolt 520 to limit the relative position of the upper main component and the connecting member. The second sealing ring 612 is installed in the second sealing ring groove; the third sealing ring 613 is installed in the third sealing ring groove. Step 4: Clean the lower main component; lubricate the sealing surface of the lower main component, the upper compression surface of the retaining ring groove, and the lower compression surface of the retaining ring groove. Lubrication reduces component friction and improves the compression and sealing effect. Step 5: Install the fourth sealing ring 614 in the sealing ring groove of the first sealing element, and install the fifth sealing ring in the sealing ring groove of the second sealing element. Step 6: Install the upper main component on the upper end of the lower main component; coaxially sleeve the connecting piece on the outside of the lower main component; install the metal seal 410 in the metal seal receiving ring groove. At this time, the sealing surface of the upper main component is in contact with the upper sealing surface of the metal seal 410. Step 7: After the upper main component, the lower main component, and the metal seal 410 are installed, use a special driving tool to rotate the operating end of the driving bolt 240. Utilizing the interaction between the outer thread of the driving bolt 240 and the inner thread of the driving bolt receiving groove, the driving bolt 240 moves radially along the connector, thereby pushing the locking block to move radially along the connector, gradually squeezing the locking block into the locking block receiving ring groove. During this process, the upper extrusion slope of the locking block interacts with the upper compression surface of the locking block receiving ring groove and the lower... The extrusion slope interacts with the lower compression surface of the receiving annular groove of the card block, and the lower end face of the card block interacts with the inner wall of the card block limiting groove. This causes the shape of the card block and the receiving annular groove to match, forming a large axial tensile force that pulls the lower main component upward and tightens it with the upper main component, and compresses the metal seal 410 upward. At this time, the sealing surface of the upper main component contacts and compresses the upper sealing surface of the metal seal 410, and the sealing surface of the lower main component contacts and compresses the lower sealing surface of the metal seal 410, thereby achieving a high-pressure seal between the upper main component and the lower main component.Step 8: After high-pressure sealing between the upper main component and the lower main component, an upper sealing space is formed between the upper main component and the upper outer wall of the metal seal 410, and a lower sealing space is formed between the lower main component and the lower outer wall of the metal seal 410. The upper sealing space and the lower sealing space are connected through the connecting channel 420. The upper sealing space is also connected to the test channel 122. The test interface 121 is connected to the test equipment. The sealing effect between the upper main component and the lower main component is detected through the test interface 121 and the test channel 122.

[0079] The self-sealing metal sealing device provided by this invention converts radial thrust into axial tension through the cooperative design of the inclined surface of the locking block and the compression surface of the locking block receiving annular groove. The compact structure and relatively small installation torque satisfy a large axial force, thus achieving the compression and sealing effect of the metal seal. Simultaneously, the threaded connection between the drive bolt and the drive bolt receiving hole has a pre-tightening self-locking function, ensuring a long-term, secure seal. The connecting channel unifies the sealing effect of the upper and lower sealing spaces of the metal seal and is equipped with a test channel and test interface for rapid post-installation seal testing. The use of a special threaded connection reduces costs. The metal seal receiving annular groove acts as a limiting structure, preventing damage from excessive compression of the metal seal. Overall, it meets the requirements of miniaturization, lightweight design, and high reliability for marine oil and gas equipment.

[0080] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A self-sealing metal sealing device, characterized in that, include: Main component; The retaining block receives an annular groove, which is coaxially disposed on the outer wall of the middle part of the lower main component; The upper main component has its lower end connected to the upper end of the lower main component; The metal seal includes an annular groove, which is formed by connecting the upper main component and the lower main component. A metal seal, which is disposed in a metal seal receiving annular groove; A connector is coaxially disposed on the outside of the upper main component and the lower main component, and is fixedly connected to the upper main component; Multiple drive bolts are evenly distributed along the circumference of the connector and are rotatably disposed inside the connector; each drive bolt is arranged radially along the connector. Multiple locking blocks are evenly distributed along the circumference of the connector and slidably disposed at the lower part of the connector; each locking block is radially disposed along the connector; each locking block corresponds to a driving bolt; one side of each locking block is rotatably connected to the driving bolt, and the other side is matched and connected to the locking block receiving annular groove. A test interface is located on the outer wall of the upper main component; The test channel is located inside the upper main component, with one end connected to the test interface and the other end connected to the metal seal receiving annular groove.

2. The self-sealing metal sealing device according to claim 1, characterized in that, The card block receiving annular groove includes: The first V-shaped annular groove, with its opening facing outward, is coaxially disposed on the outer wall of the lower main body. The second V-shaped annular groove has an outward opening and is coaxially disposed on the outer wall of the lower main body; the second V-shaped annular groove is disposed below the first V-shaped annular groove.

3. The self-sealing metal sealing device according to claim 2, characterized in that, The card block includes: A first V-shaped protrusion is disposed on one side of the card block; the first V-shaped protrusion is matched and connected with the first V-shaped annular groove. The second V-shaped protrusion is disposed on the same side as the first V-shaped protrusion; the second V-shaped protrusion is disposed below the first V-shaped protrusion. A drive bolt connection slot is located on the other side of the clamp block.

4. The self-sealing metal sealing device according to claim 3, characterized in that, Also includes: Multiple drive bolt operating holes are evenly distributed along the circumference of the connector and are located on the outer wall of the lower part of the connector; Multiple drive bolt receiving holes are arranged radially inside the connector; the drive bolt receiving holes are through holes with threads on their inner walls. The driving bolt, the driving bolt receiving hole, and the driving bolt operating hole shall be provided in a specific configuration. The driving bolt is rotatably disposed in the corresponding driving bolt receiving hole, the operating end is disposed in the corresponding driving bolt operating hole, and the other end is rotatably disposed in the corresponding driving bolt connecting groove.

5. The self-sealing metal sealing device according to claim 1, characterized in that, Also includes: A connecting channel is provided on the metal seal along its axial direction; The connecting channel can connect the sealing spaces above and below the metal seal.

6. The self-sealing metal sealing device according to claim 1, characterized in that, Also includes: A retaining ring groove is coaxially disposed on the outer wall of the middle part of the upper main component; A retaining ring is disposed within the retaining ring groove; the lower surface of the retaining ring contacts the connector. Multiple fixing bolt through holes are evenly distributed along the circumference of the retaining ring and are provided on the retaining ring; each fixing bolt through hole is provided along the axial direction of the retaining ring; Multiple fixing bolt connection slots are evenly distributed along the circumference of the connector and are located at the upper end of the connector; Multiple fixing bolts are provided, each corresponding to a fixing bolt through hole and a fixing bolt connecting groove, and are threadedly connected to the fixing bolt connecting groove.

7. The self-sealing metal sealing device according to claim 1, characterized in that, Also includes: The first sealing groove is coaxially disposed at the upper end of the outer side of the metal sealing element; The second sealing groove is coaxially disposed at the lower end of the outer side of the metal seal.

8. The self-sealing metal sealing device according to claim 7, characterized in that, Also includes: A first sealing ring is disposed between the upper main component and the connecting component; The second sealing ring and the third sealing ring are disposed between the lower main component and the connecting component; the second sealing ring and the third sealing ring are respectively disposed at the upper end and the lower end of the lower main component; The fourth sealing ring is disposed within the sealing groove of the first sealing element and between the upper main component and the metal sealing element; The fifth sealing ring is disposed within the sealing groove of the second sealing element, between the lower main component and the metal sealing element.

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