Multi-stage sealing automatic under-pressure leaking stoppage tool

Abstract

The invention relates to the technical field of under-pressure leaking stoppage equipment, and discloses a multi-stage sealing automatic under-pressure leaking stoppage tool which comprises an inner pipe and an outer pipe. A first sealing plate is arranged at one end of the inner pipe, the outer pipe is slidably connected with the inner pipe, a fixing plate and a second sealing plate are arranged at the two ends of the outer pipe respectively, and an inflation expansion assembly is arranged on the inner side of the second sealing plate. The outer pipe is provided with a glue injection port communicated with the interior; a pushing mechanism is arranged between the inner pipe and the outer pipe and is fixedly connected with the inner pipe; the outer pipe is fixedly connected with a moving device which is used for driving the inner pipe and the outer pipe to move. When leaking stoppage is conducted on a target pipeline, three-level sealing design can be achieved, the sealing effect is good, the tool is moved and controlled through the mechanical arm, therefore, an operator is far away from the pipeline leakage position, and the safety of the operator is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure plugging equipment, in particular to a multi-stage sealing automatic pressure plugging tool. BACKGROUND

[0002] In the oil, gas, chemical, pipeline and other related industries, pipeline leakage has always been a very serious safety hazard. Leakage not only can cause loss of raw materials, equipment damage and production interruption, but also can bring serious consequences such as environmental pollution and personnel casualties. In order to reduce these risks and ensure the safe and stable operation of the equipment, pipeline plugging technology has been widely used.

[0003] Traditional plugging technology usually relies on shutting down production, reducing pressure, or even cutting off the damaged part of the pipeline. These methods often require the production line to be shut down, which not only leads to a decrease in production efficiency, but also increases maintenance costs and downtime losses. Especially in high-pressure and high-temperature working environments, the application of traditional plugging technology faces greater challenges.

[0004] Pressure plugging technology has emerged as the times require. It avoids the need for shutdown and pressure reduction by plugging leaks while the pipeline is still in operation, ensuring the continuity of production. Pressure plugging technology is mainly suitable for high-pressure pipeline systems, including oil and gas transportation pipelines, high-pressure pipelines in chemical plants, etc. Its core technology is to use special equipment and materials to quickly and effectively seal the leakage point without the need for shutdown.

[0005] Existing pressure plugging tools rely on manual close-range operation, mainly through on-site positioning, installation of sealing clamps or wrapping structures, building a temporary sealing cavity around the leakage point, and then injecting sealing materials or external force to block the leakage of the medium. However, there are the following problems: high safety risks, workers must approach high-pressure, high-temperature or toxic leakage points, posing a high risk to personal safety; insufficient sealing reliability, traditional sealing tools generally only use a single sealing method without multi-stage sealing design, posing a risk of secondary leakage, and the installation precision and sealing effect depend on the experience of the operator and environmental conditions.

[0006] Therefore, there is an urgent need for a new type of pressure plugging tool that can adapt to high-risk and complex working conditions and has remote operation capability to improve the efficiency and safety of leakage emergency handling and meet the technical needs of modern industrial systems for efficient emergency management. SUMMARY

[0007] The purpose of the present application is to provide a multi-stage sealing automatic pressure plugging tool with good plugging effect and high plugging safety.

[0008] The above technical purpose of the present application is achieved by the following technical scheme: A multi-stage sealing automatic pressure plugging tool, comprising an inner tube and an outer tube, wherein, The inner tube comprises two semicircular inner tube pieces, and one end of the inner tube is provided with a first sealing plate, and the inner end of the first sealing plate is sealingly attached to the outer wall of the target pipeline. The outer tube is slidingly connected to the inner tube, and the outer tube comprises two semicircular outer tube pieces, and the two ends of the outer tube are respectively provided with a fixed plate and a second sealing plate, the first sealing plate is arranged inside the outer tube, the outer end of the first sealing plate is slidingly connected with the inner wall of the outer tube, and the inner side of the second sealing plate is provided with an inflatable expansion assembly, which can be inflated to fill the inner cavity of the outer tube; the outer tube is provided with a glue injection port in communication with the inside, and a driving component is arranged between the two semicircular outer tube pieces, which is used to control the opening and closing of the outer tube. A pushing mechanism is arranged between the inner tube and the outer tube, the pushing mechanism is fixedly connected with the inner tube, and the working end of the pushing mechanism is connected with the outer tube, and the pushing mechanism is used to push the outer tube to slide. The outer tube is fixedly connected with a moving device, and the moving device is used to drive the inner tube and the outer tube to move.

[0009] As a further arrangement of the application, the outer tube comprises an upper outer tube piece and a lower outer tube piece, the fixed plate and the second sealing plate respectively comprise two semicircular plate bodies, the two semicircular sealing plates are respectively fixedly connected with the two ends of the upper outer tube piece and the lower outer tube piece, the first hinge part is fixedly connected with the upper outer tube piece, the second hinge part is fixedly connected with the lower outer tube piece, and the first hinge part and the second hinge part are hinged; the driving component comprises a cylinder, the lower outer tube piece is fixedly connected with a bracket, the cylinder is fixedly arranged in the bracket, the cylinder is vertically arranged, one end of the first hinge part is hingedly connected with a connecting plate, and one end of the connecting plate is hingedly connected with the working end of the cylinder.

[0010] As a further arrangement of the application, the upper outer tube piece and the lower outer tube piece are respectively fixedly provided with a first upper support plate and a first lower support plate on the side away from the cylinder, the first upper support plate is fixedly connected with a first expansion connecting piece, a first connecting groove is formed in the first lower support plate, and the expansion section of the first expansion connecting piece passes through the first connecting groove and is located on the side of the first lower support plate away from the first upper support plate.

[0011] As a further arrangement of the present application, the inner tube comprises an upper inner tube piece and a lower inner tube piece, the first sealing plate comprises two semicircular plate bodies fixedly connected with the same side of the upper inner tube piece and the lower inner tube piece respectively, second upper support plates are fixedly arranged on both sides of the upper inner tube piece, second lower support plates are arranged on both sides of the lower inner tube piece, a second expansion connecting piece is fixedly arranged on the second upper support plate, a second connecting groove is formed in the second lower support plate, and the second expansion connecting piece passes through the second connecting groove and is located on the side of the second lower support plate away from the second upper support plate.

[0012] As a further arrangement of the present application, the first expansion connecting piece and the second expansion connecting piece are of the same structure, the first expansion connecting piece comprises a support part and an expansion part, the support part is fixedly connected with the first upper support plate and the second upper support plate, an air passage is arranged in the support part, and the expansion part is fixedly arranged below the support part, an inner cavity is arranged in the expansion part, and the inner cavity is in communication with the air passage.

[0013] As a further arrangement of the present application, the inner end of the second sealing plate is provided with a sealing groove, the glue injection port comprises a first glue injection port and a second glue injection port, the first glue injection port is in communication with the inner cavity of the outer tube, a glue injection channel is arranged in the second sealing plate, the second glue injection port is in communication with the glue injection channel, and the glue injection channel is in communication with the sealing groove.

[0014] As a further arrangement of the present application, the inner tube is fixedly provided with a connecting convex part at the end away from the first sealing plate, a sliding rod is fixedly arranged on the outer side of the inner tube between the connecting convex part and the first sealing plate, the sliding rod is parallel to the axis of the inner tube, and the fixed plate is in sliding connection with the sliding rod.

[0015] As a further arrangement of the present application, the inner end of the fixed plate is provided with a spring ball, the ball part of the spring ball abuts against the outer wall of the inner tube, the outer wall of the inner tube is provided with a circular hole matched with the ball part of the spring ball on the side close to the first sealing plate, and when the pushing mechanism pushes the outer tube to slide to abut against the fixed plate and the first sealing plate, the ball part of the spring ball is located in the circular hole.

[0016] As a further arrangement of the present application, the pushing mechanism comprises an electromagnetic spring, one end of the electromagnetic spring is fixedly connected with the inner tube, the working end of the electromagnetic spring is fixedly connected with the outer tube, and the electromagnetic spring is provided with a start-stop button.

[0017] As a further arrangement of the present application, the moving device comprises a mechanical arm, and the working end of the mechanical arm is detachably connected with the outer tube.

[0018] The present application has the following beneficial effects: When the target pipeline is plugged, the three-level sealing design can be realized, the first level sealing is formed when the outer pipe covers the target pipeline leakage, the second level sealing is formed when the inflatable air bag is inflated to fill the entire sealing chamber, the third level sealing is formed when the sealing glue is injected into the glue injection port to fill the remaining gaps, through the effect of three-level sealing, the plugging effect of the plugging tool of the embodiment is better. In addition, the tool is moved and controlled by the mechanical arm, so that the operator is away from the pipeline leakage, and the safety of the operator is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a schematic diagram of the overall structure of the embodiment; Figure 2 is another view of the schematic diagram of the overall structure of the embodiment; Figure 3 is a schematic diagram of the cut structure of the embodiment; Figure 4 is a schematic diagram of the inner tube structure of the embodiment; Figure 5 is a schematic diagram of the outer tube structure of the embodiment; Figure 6 is a schematic diagram of the upper outer tube piece structure of the embodiment; In the figure, 1 is an inner tube, 11 is a first sealing plate, 12 is an upper inner tube piece, 13 is a lower inner tube piece, 14 is a second upper support plate, 15 is a second lower support plate, 16 is a second expansion connecting piece, 2 is an outer tube, 21 is a fixed plate, 22 is a second sealing plate, 23 is an inflatable expansion assembly, 241 is a first glue injection port, 242 is a second glue injection port, 25 is a driving part, 26 is an upper outer tube piece, 27 is a lower outer tube piece, 28 is a first hinge part, 29 is a second hinge part, 210 is a bracket, 211 is a connecting plate, 212 is a first upper support plate, 213 is a first lower support plate, 214 is a first expansion connecting piece, 215 is a sealing groove, 3 is a pushing mechanism, 41 is a support part, 42 is an expansion part, 5 is a sliding rod, 61 is a spring ball, 62 is a circular hole, 7 is an electromagnetic spring, 71 is a button, and 8 is a pressure relief valve. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be clearly and completely described below in combination with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0022] A multi-stage sealing automatic pressure plugging tool, referring to Figures 1-6 , comprising an inner tube 1 and an outer tube 2, the inner tube 1 is used for clamping and fixing the target pipeline, and the outer tube 2 is used for plugging the pipeline leakage; Specifically, the inner tube 1 includes a semicircular upper inner tube piece 12 and a lower inner tube piece 13, the combination of the upper inner tube piece 12 and the lower inner tube piece 13 clamps the target pipeline, and a first sealing plate 11 is arranged on the side of the inner tube 1 facing the leakage port, the first sealing plate 11 has a ring structure, a central part of the first sealing plate 11 is provided with an opening, and an inner end opening of the first sealing plate 11 is in sealing abutment with the target pipeline. Since the inner tube 1 has an upper and lower two-part structure, the first sealing plate 11 is also adaptively arranged as an upper and lower two-part semicircular plate body, and the two semicircular plate bodies are fixedly connected with the upper inner tube piece 12 and the lower inner tube piece 13 respectively. When the upper inner tube piece 12 and the lower inner tube piece 13 clamp the target pipeline, the two semicircular plate bodies combine to form a ring-shaped first sealing plate 11, and the inner end of the first sealing plate 11 is in sealing with the target pipeline. An outer tube 2 is slidably arranged outside the inner tube 1, the outer tube 2 includes a semicircular upper outer tube piece 26 and a lower outer tube piece 27, and the inner diameter of the outer tube 2 is greater than the pipe diameter of the target pipeline and the outer diameter of the inner tube 1, so that the outer tube 2 can move outside the inner tube 1 and surround the leakage of the target pipeline; the outer tube 2 is provided with a fixed plate 21 and a second sealing plate 22 at two ends, the first sealing plate 11 is located between the fixed plate 21 and the second sealing plate 22, and the outer end of the first sealing plate 11 is in sealing abutment with the inner wall of the outer tube 2. The abutment here refers to a sealing effect achieved when the upper outer tube piece 26 and the lower outer tube piece 27 are combined, and it is not always sealed. Since the outer tube 2 has an upper and lower two-part structure, the fixed plate 21 and the second sealing plate 22 are also adaptively arranged as an upper and lower two-part semicircular plate body, and are adaptively fixedly arranged at the two ends of the upper outer tube piece 26 and the lower outer tube piece 27 respectively. When the upper outer tube piece 26 and the lower outer tube piece 27 are closed to form a circular outer tube 2, the upper and lower two-part semicircular plate bodies at the two ends also combine to form a ring-shaped fixed plate 21 and a second sealing plate 22, and the inner ends of the fixed plate 21 and the second sealing plate 22 face and are close to the target pipeline. The fixed plate 21 is used for slidably connecting the inner tube 1, and the second sealing plate 22 is used for forming a seal with the target pipeline. Specifically, when the outer tube 2 is plugging, the first sealing plate 11, the inner wall of the outer tube 2, the second sealing plate 22 and the outer wall of the target pipeline form a sealed chamber. The sealing property of the second sealing plate 22 to the target pipeline and the sealing cavity is achieved by the inflation expansion assembly 23 and the injection of sealant. Specifically, the inflation expansion assembly 23 is arranged on the inner side of the second sealing plate 22 in the sealing cavity, and the outer pipe 2 is provided with a sealant injection opening in communication with the inside. When the inflation expansion assembly 23 is inflated, the inflation expansion assembly 23 will expand, thereby filling the above-mentioned sealing cavity and wrapping the leakage of the pipeline. Then, the sealant is injected into the sealing cavity through the sealant injection opening, so as to seal the sealing cavity and achieve the plugging of the leakage.

[0023] For the structure of loosening and locking the semicircular pipe pieces of the inner pipe 1 and the outer pipe 2, the following structure is adopted in the embodiment. For the outer pipe 2, one side of the upper outer pipe piece 26 is fixedly connected with the first hinge part 28, and the other side is provided with the first upper support plate 212. The corresponding side of the lower outer pipe piece 27 to the upper outer pipe piece 26 is fixedly connected with the second hinge part 29, and the other side is fixedly connected with the first lower support plate 213. The first hinge part 28 is hinged with the second hinge part 29. The lower outer pipe piece 27 is fixedly connected with the driving part 25. Through the action of the driving part 25, the upper outer pipe piece 26 can be driven to rotate, so as to open or close the outer pipe 2. The first upper support plate 212 is fixedly connected with the first expansion connecting piece 214. The first lower support plate 213 is provided with the first connecting slot. The expansion section of the first expansion connecting piece 214 passes through the first connecting slot and is located on the side of the first lower support plate 213 away from the first upper support plate 212. The driving part 25 includes the bracket 210 and the cylinder. The bracket 210 is fixedly connected with the lower outer pipe piece 27. The cylinder is fixedly arranged on the bracket 210. The cylinder is vertically arranged. One end of the first hinge part 28 is hinged with the connecting plate 211. One end of the connecting plate 211 is hinged with the working end of the cylinder. When the cylinder is contracted, the connecting plate 211 is pulled, the connecting plate 211 pulls the first hinge part 28, the first hinge part 28 is rotated, and the upper outer pipe piece 26 is driven to rotate, so as to open the outer pipe 2. Conversely, when the cylinder is elongated, the outer pipe 2 is closed. For the inner pipe 1, the second upper support plate 14 is fixedly arranged on both sides of the upper inner pipe piece 12. The second lower support plate 15 is arranged on both sides of the lower inner pipe piece 13. The second expansion connecting piece 16 is fixedly arranged on the second upper support plate 14. The second lower support plate 15 is provided with the second connecting slot. The second expansion connecting piece 16 passes through the second connecting slot and is located on the side of the second lower support plate 15 away from the second upper support plate 14.

[0024] The first expansion connector 214 and the second expansion connector 16 are the same in structure, and specifically include a support part 41 and an expansion part 42. The support part 41 is fixedly connected with the first upper support plate 212 and the second upper support plate 14. An air passage is arranged in the support part 41. The expansion part 42 is fixedly arranged below the support part 41. An inner cavity is arranged in the expansion part 42. The inner cavity is communicated with the air passage. The expansion part 42 is located below the first lower support plate 213 and the second lower support plate 15. The expansion part 42 is inflated by the air passage. The expansion part 42 is expanded and enlarged, so as to press the first lower support plate 213 and the second lower support plate 15. The first lower support plate 213 is abutted with the first upper support plate 212. The second lower support plate 15 is abutbed with the second upper support plate 14.

[0025] Further, in the embodiment, the inner end of the second sealing plate 22 is provided with a glue injection groove. The inner part of the second sealing plate 22 is provided with a glue injection channel. The glue injection port includes at least a first glue injection port 241 and a second glue injection port 242. The first glue injection port 241 is communicated with the inner cavity of the outer pipe 2. The second glue injection port 242 is communicated with the glue injection channel. The glue injection channel is communicated with the sealing groove 215. Glue is injected into the first glue injection port 241 and the second glue injection port 242 at the same time during glue injection. The glue in the first glue injection port 241 is injected into the inner cavity of the outer pipe 2. The glue in the second glue injection port 242 is injected into the sealing groove 215. The contact sealing property between the second sealing plate 22 and the target pipe is further ensured.

[0026] In the embodiment, in order to facilitate the sliding of the outer pipe 2 outside the inner pipe 1, a pushing mechanism 3 is arranged between the outer pipe 2 and the inner pipe 1. The pushing mechanism 3 includes an electromagnetic spring 7. The shell of the electromagnetic spring 7 is fixedly connected with the inner pipe 1. The working end of the electromagnetic spring 7 is connected with the outer pipe 2. The electromagnetic spring 7 is provided with a button 71. During operation, the electromagnetic spring 7 can be started by pressing the button 71 by a mechanical arm. The electromagnetic spring 7 is elongated to push the outer pipe 2 to slide.

[0027] In addition, the end of the inner pipe 1 away from the first sealing plate 11 is fixedly provided with a connecting convex part. A sliding rod 5 is fixedly arranged outside the inner pipe 1 between the connecting convex part and the first sealing plate 11. The sliding rod 5 is parallel to the axis of the inner pipe 1. The fixed plate 21 is slidingly connected with the sliding rod 5. Further, the inner end of the fixed plate 21 is provided with a spring ball 61. The ball part of the spring ball 61 is abutted with the outer wall of the inner pipe 1. The outer wall of the inner pipe 1 near the first sealing plate 11 is provided with a circular hole 62 matched with the ball part of the spring ball 61. When the electromagnetic spring 7 pushes the outer pipe 2 to slide to abut the fixed plate 21 with the first sealing plate 11, the ball part of the spring ball 61 is located in the circular hole 62. Through the arrangement of the sliding rod 5 and the spring ball 61, the sliding of the outer pipe 2 outside the inner pipe 1 is more smooth. Through the arrangement of the ball and the circular hole 62, the outer pipe 2 is more stable after moving to the target position.

[0028] In addition, in order to avoid the artificial being too close to the leakage of the target pipeline, a moving device is used to move the entire plugging device, and the moving device of the embodiment uses an intelligent control mechanical arm, and a mechanical arm connecting device is arranged on the support 210 and used to connect with the mechanical arm.

[0029] The cylinder, the expansion connecting piece and the inflatable air bag of the embodiment are all connected with air pipes, and the air pipes are used for air supply.

[0030] In addition, a pressure relief pipe and a pressure relief valve 8 are arranged below the lower outer pipe sheet 27, the pressure relief valve 8 is in an open state before the inflatable air bag is inflated, until the inflatable air bag fills the entire sealing cavity, and then the mechanical arm is closed. The pressure relief valve 8 is in an open state before the inflatable air bag is inflated, so that the load pressure borne by the plugging tool during the plugging process is smaller, and the plugging process is better completed. The pressure relief valve 8 is controlled by the mechanical arm, and the control principle is a conventional technical means in the art.

[0031] Through the above structure, the embodiment can realize three-stage sealing design when plugging the target pipeline, the first-stage sealing is formed when the outer pipe 2 moves horizontally to cover the leakage of the target pipeline, the second-stage sealing is formed when the inflatable air bag is inflated to fill the entire sealing cavity, and the third-stage sealing is formed when the sealant is injected into the glue injection port to fill the remaining gaps. Through the action of the three-stage sealing, the plugging effect of the plugging tool of the embodiment is better.

[0032] In other embodiments, the pushing mechanism 3 and the driving component 25 can adopt other structures, and the specific structures can achieve the technical effects of the embodiment.

[0033] The working principle of the embodiment is as follows: When the target pipeline 9 appears leakage, the mechanical arm moves the sealing tool to the leakage, and the inner tube 1 is moved to the side of the leakage. First, the lower inner tube piece 13 is abutted against the target pipeline 9, and then the upper inner tube piece 12 is abutted against the lower inner tube piece 13 by the action of the cylinder, and the upper outer tube piece 26 is also abutted against the lower outer tube piece 27. Then, the control component on the mechanical arm starts the air pump to inflate the second expansion connector 16. After the expansion of the expansion part 42 of the second expansion connector 16, the upper inner tube piece 12 and the lower inner tube piece 13 are abutted against each other to clamp the target pipeline 9. Then, the mechanical arm triggers the button 71 to start the electromagnetic spring 7, and the electromagnetic spring 7 is elongated to push the outer tube to move. The outer tube slides to the fixed plate 21 abutting against the first sealing plate 11, and the spring ball 61 enters the round hole 62. Then, the control component on the mechanical arm starts the air pump to inflate the first expansion connector 214. After the expansion of the expansion part 42 of the first expansion connector 214, the upper outer tube piece 26 and the lower outer tube piece 27 are abutted against each other to form a first-stage seal with the target pipeline. Then, the pressure relief valve 8 is opened, and the inflation air bag is inflated through the air hole on the side of the outer tube 2. The inflation air bag gradually expands and occupies the space in the inner cavity of the outer tube 2 to form a second-stage seal. After the inflation of the inflation air bag is completed, the pressure relief valve 8 is closed, and then the two glue injection ports are used for glue injection. The glue fills the small gaps in the inner cavity of the outer tube to complete a third-stage seal.

[0034] The control and coordination components not mentioned in the embodiment are conventional technical means in the art, and those skilled in the art can set them up by themselves, as long as they can realize the technical effects of the embodiment.

[0035] Those skilled in the art can understand that the above only describes the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-stage sealed automatic pressure containment tooling, characterized by, It includes inner tube (1), outer tube (2), wherein, The inner tube (1) is used for clamping the target pipeline, one end of the inner tube (1) is provided with a first sealing plate (11), and the inner end of the first sealing plate (11) is sealingly attached to the outer wall of the target pipeline. The outer tube (2) is slidably connected with the inner tube (1), both ends of the outer tube (2) are respectively provided with a fixed plate (21) and a second sealing plate (22), the first sealing plate (11) is arranged inside the outer tube (2), the outer end of the first sealing plate (11) is slidably connected with the inner wall of the outer tube (2), and the inner side of the second sealing plate (22) is provided with an inflatable expansion assembly (23), which can be inflated to fill the inner cavity of the outer tube (2) after inflation; the outer tube (2) is provided with a glue injection port in communication with the inside, and a driving component (25) is arranged between the two semicircular outer tube pieces, the driving component (25) is used for controlling the opening and closing of the outer tube (2). The inner tube (1) and the outer tube (2) are provided with a pushing mechanism (3), the pushing mechanism (3) is fixedly connected with the inner tube (1), the working end of the pushing mechanism (3) is connected with the outer tube (2), and the pushing mechanism (3) is used for pushing the outer tube (2) to slide. The outer tube (2) is fixedly connected with a moving device, and the moving device is used for driving the inner tube (1) and the outer tube (2) to move.

2. The multi-stage sealed automatic pressure containment tool of claim 1, wherein, The outer tube (2) includes an upper outer tube piece (26) and a lower outer tube piece (27), the fixed plate (21) and the second sealing plate (22) respectively include two semicircular plate bodies, the two semicircular sealing plates are respectively fixedly connected with both ends of the upper outer tube piece (26) and the lower outer tube piece (27), the upper outer tube piece (26) is fixedly connected with a first hinge part (28), the lower outer tube piece (27) is fixedly connected with a second hinge part (29), and the first hinge part (28) and the second hinge part (29) are hinged; the driving component (25) includes a pneumatic cylinder, the lower outer tube piece (27) is fixedly connected with a bracket (210), the pneumatic cylinder is fixedly arranged in the bracket (210), the pneumatic cylinder is vertically arranged, one end of the first hinge part (28) is hinged with a connecting plate (211), and one end of the connecting plate (211) is hinged with the working end of the pneumatic cylinder.

3. The multi-stage sealed automatic pressure containment tool of claim 2, wherein, The upper outer tube piece (26) and the lower outer tube piece (27) are respectively fixedly provided with a first upper support plate (212) and a first lower support plate (213) away from the pneumatic cylinder, the first upper support plate (212) is fixedly connected with a first expansion connecting piece (214), a first connecting groove is formed in the first lower support plate (213), and the expansion section of the first expansion connecting piece (214) passes through the first connecting groove and is located away from the first upper support plate (212) on one side of the first lower support plate (213).

4. The multi-stage sealed automatic pressure containment tool of claim 3, wherein, The inner tube (1) comprises an upper inner tube sheet (12) and a lower inner tube sheet (13), the first sealing plate (11) comprises two semicircular plate bodies, and the two semicircular plate bodies are fixedly connected with the same side of the upper inner tube sheet (12) and the lower inner tube sheet (13) respectively, second upper support plates (14) are fixedly arranged on the two sides of the upper inner tube sheet (12), second lower support plates (15) are arranged on the two sides of the lower inner tube sheet (13), second expansion connecting pieces (16) are fixedly arranged on the second upper support plates (14), second connecting grooves are formed in the second lower support plates (15), and the second expansion connecting pieces (16) pass through the second connecting grooves and are located on the side of the second lower support plates (15) away from the second upper support plates (14).

5. The multi-stage sealed automatic pressure containment tool of claim 4, wherein, The first expansion connecting piece (214) and the second expansion connecting piece (16) are the same in structure, the first expansion connecting piece (214) comprises a support portion (41) and an expansion portion (42), the support portion (41) is fixedly connected with the first upper support plate (212) and the second upper support plate (14), an air channel is arranged in the support portion (41), the expansion portion (42) is fixedly arranged below the support portion (41), and an inner cavity is arranged in the expansion portion (42) and communicates with the air channel.

6. The multi-stage sealed automatic pressure containment tool of claim 1, wherein, The inner end of the second sealing plate (22) is provided with a sealing groove (215), the glue injection opening comprises a first glue injection opening (241) and a second glue injection opening (242), the first glue injection opening (241) communicates with the inner cavity of the outer tube (2), the second sealing plate (22) is provided with a glue injection channel, the second glue injection opening (242) communicates with the glue injection channel, and the glue injection channel communicates with the sealing groove (215).

7. The multi-stage sealed automatic pressure containment tool of claim 1, wherein, The inner tube (1) is fixedly provided with a connecting convex portion at the end away from the first sealing plate (11), a sliding rod (5) is fixedly arranged on the outer side of the inner tube (1) between the connecting convex portion and the first sealing plate (11), the sliding rod (5) is parallel to the axis of the inner tube (1), and the fixing plate (21) is in sliding connection with the sliding rod (5).

8. The multi-stage sealed automatic pressure containment tool of claim 1, wherein, The inner end of the fixing plate (21) is provided with spring balls (61), the ball portions of the spring balls (61) abut against the outer wall of the inner tube (1), the outer wall of the inner tube (1) is provided with a circular hole (62) matched with the ball portions of the spring balls (61) on the side close to the first sealing plate (11), and when the pushing mechanism (3) pushes the outer tube (2) to slide to abut against the fixing plate (21) and the first sealing plate (11), the ball portions of the spring balls (61) are located in the circular hole (62).

9. The multi-stage sealed automatic pressure containment tool of claim 1, wherein, The pushing mechanism (3) comprises an electromagnetic spring (7), one end of the electromagnetic spring (7) is fixedly connected with the inner tube (1), the working end of the electromagnetic spring (7) is fixedly connected with the outer tube (2), and the electromagnetic spring (7) is provided with a start-stop button (71).

10. The multi-stage sealed automatic pressure containment tool of claim 1, wherein, The moving device comprises a mechanical arm, and the working end of the mechanical arm is detachably connected with the outer tube (2).

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