Sectional type underwater special-shaped metal pipe joint outer wall protection device

Abstract

The invention discloses a sectional type underwater special-shaped metal pipe joint outer wall protection device, and relates to the technical field of underwater pipeline installation. The invention provides a sectional type underwater special-shaped metal pipe joint outer wall protection device which comprises an upper reinforcing plate frame and the like, the upper reinforcing plate frame is rotationally connected with paired screws, a lower reinforcing plate frame is in threaded connection between the paired screws, the upper reinforcing plate frame is fixedly connected with a flexible laminating film, the lower reinforcing plate frame is also fixedly connected with a flexible laminating film, and the flexible laminating film is fixedly connected with the lower reinforcing plate frame. The upper reinforcing plate frame is fixedly connected with paired mounting plates, the lower reinforcing plate frame is also fixedly connected with paired mounting plates, an elastic rope is fixedly connected between the paired mounting plates, and the elastic rope is in contact fit with the flexible laminating film. By means of the components such as the flexible attaching film and the elastic rope, the device can adapt to special-shaped metal pipes in various shapes and customized connectors, the connectors at the connecting positions and part of the metal pipes are subjected to wrapping type sealing protection, and therefore the situation that the connectors are damaged and leak under the impact, corrosion and pressure of seawater is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater pipeline installation, in particular to a segmented underwater special-shaped metal pipe connection outer wall protection device. Background Art

[0002] Special-shaped metal pipes refer to metal pipes with non-circular cross-sections. Their shapes can be designed and changed according to needs. Special-shaped metal pipes made of stainless steel, titanium alloy, copper-nickel alloy and other materials have become core materials for marine engineering due to their high strength, corrosion resistance and ability to adapt to complex shapes. They are often used in the construction of submarine pipelines in underwater environments.

[0003] When special-shaped metal pipes are used for submarine oil and gas transportation, specially customized connectors are required to seal and connect the segmented pipes. However, the connectors are not only susceptible to the impact and corrosion of seawater and damage on the seabed, but may also break and leak under the high-pressure environment of the seabed. Therefore, the connectors usually need to be protected by pipe joint protection devices. Existing underwater metal pipe joint outer wall protection devices are usually only suitable for cylindrical pipes, and cannot be applied to special-shaped metal pipes of various shapes, resulting in poor versatility and protection effect of the pipe joint protection devices.

[0004] Based on the above situation, the present invention proposes a segmented underwater special-shaped metal pipe joint outer wall protection device with high versatility and good protection effect. Summary of the Invention

[0005] In order to overcome the shortcomings of existing underwater metal pipe joint outer wall protection devices that are usually only suitable for cylindrical pipes but cannot be applied to various shapes of special-shaped metal pipes, resulting in poor versatility and protective effect of the pipe joint protection devices, the present invention provides a segmented underwater special-shaped metal pipe joint outer wall protection device with high versatility and good protective effect.

[0006] A segmented underwater special-shaped metal pipe connection outer wall protection device includes an upper reinforcement plate frame, a lower reinforcement plate frame, a flexible bonding film, a screw, a mounting plate and an elastic rope. The upper reinforcement plate frame is rotatably connected to a pair of screws, and the lower reinforcement plate frame is threadedly connected between the paired screws. The upper reinforcement plate frame is fixedly connected to the flexible bonding film, and the lower reinforcement plate frame is also fixedly connected to the flexible bonding film. The flexible bonding film is used to wrap the connector between two special-shaped metal pipes. The upper reinforcement plate frame is fixedly connected to a pair of mounting plates, and the lower reinforcement plate frame is also fixedly connected to a pair of mounting plates. Elastic ropes are fixedly connected between the paired mounting plates, and the elastic ropes are in contact with and cooperate with the flexible bonding film.

[0007] Optionally, the flexible laminating film is made of polyvinyl chloride.

[0008] Optionally, a sealing mechanism is also included, which is arranged on the upper reinforcement plate frame and the lower reinforcement plate frame. The sealing mechanism includes a top block, an air cylinder, an air duct and an expansion block. The pairs of expansion blocks are respectively fixed to the upper reinforcement plate frame and the lower reinforcement plate frame. The upper reinforcement plate frame is fixed with a pair of air cylinders, and the lower reinforcement plate frame is also fixed with a pair of air cylinders. The piston rod of the air cylinder is fixed with a top block, and the paired top blocks are squeezed and fitted with each other. The cylinder body of the air cylinder and the expansion block are fixed and connected with an air duct.

[0009] Optionally, a tightening mechanism is also included, which is arranged on the flexible bonding film. The tightening mechanism includes a pressure block and an elastic rope. The longitudinally distributed elastic ropes are all fixed to the flexible bonding film. The elastic ropes are fixed to the axially distributed pressure blocks, and the pressure blocks are squeezed and fitted with the flexible bonding film.

[0010] Optionally, the compact is ellipsoidal.

[0011] Optionally, a bonding mechanism is also included, which is arranged on the upper reinforcement plate frame and the lower reinforcement plate frame, and the bonding mechanism includes an extrusion block, an extrusion airbag and an air outlet pipe, and pairs of extrusion airbags are respectively fixed to the upper reinforcement plate frame and the lower reinforcement plate frame, the upper reinforcement plate frame is slidably connected with the extrusion block, and the lower reinforcement plate frame is also slidably connected with the extrusion block, the extrusion block is fixed to the extrusion airbag, the upper reinforcement plate frame is fixed with a pair of longitudinally distributed air outlet pipes, and the lower reinforcement plate frame is also fixed with a pair of longitudinally distributed air outlet pipes, one end of the air outlet pipe is fixed and connected to the extrusion airbag, the other end of the air outlet pipe on the upper reinforcement plate frame is connected to a chamber formed by the combination of the upper reinforcement plate frame and the flexible bonding film, and the other end of the air outlet pipe on the lower reinforcement plate frame is connected to a chamber formed by the combination of the lower reinforcement plate frame and the flexible bonding film.

[0012] Optionally, a fixing mechanism is further included, which is arranged on the upper reinforcement plate frame and the lower reinforcement plate frame. The fixing mechanism includes screws and mounting blocks. The paired mounting blocks are respectively fixed to the upper reinforcement plate frame and the lower reinforcement plate frame, and the mounting blocks are threadedly connected with screws.

[0013] The beneficial effects are: 1. The present invention can adapt to various shapes of special-shaped metal pipes and customized connectors through components such as flexible bonding films and elastic ropes, and perform wrapped sealing protection on the connectors and part of the metal pipes at the connection, thereby effectively preventing the connectors from being damaged and causing leakage under the impact, corrosion and pressure of seawater, thereby improving the versatility and protective effect of this special-shaped metal pipe connection outer wall protection device.

[0014] 2. The present invention uses components such as a top block and an expansion block to enable the left and right sides of the flexible bonding film to maintain close contact with various shapes of special-shaped metal tubes, thereby avoiding the presence of gaps between the left and right sides of the flexible bonding film when bonding with the concave metal tube, thereby improving the versatility and sealing of the outer wall protection device at the connection of the special-shaped metal tube.

[0015] 3. The present invention can further improve the adhesion between the flexible bonding film and the connector and the special-shaped metal tube through the pressing block and the elastic rope, thereby effectively preventing seawater from penetrating and corroding the connector, and improving the sealing and protective effect of the outer wall protection device at the connection of the special-shaped metal tube.

[0016] 4. The present invention uses components such as extrusion blocks and extrusion airbags to increase the air pressure in the chamber formed by the upper reinforcement plate frame, the lower reinforcement plate frame and the flexible adhesive film with the help of water pressure, thereby improving the sealing between the flexible adhesive film and the connector and the special-shaped metal tube, so as to prevent seawater from penetrating through the gap between the flexible adhesive film and the special-shaped metal tube under the action of water pressure and causing corrosion to the connector, thereby improving the sealing and protective effect of the outer wall protection device of the special-shaped metal tube connection.

[0017] 5. The present invention can fix the upper reinforcement plate frame and other components to the connection of various shapes of special-shaped metal pipes through screws and mounting blocks, thereby preventing the upper reinforcement plate frame and other components from sliding relative to the special-shaped metal pipe under the impact of seawater and affecting the protective effect, thereby improving the versatility and stability of this special-shaped metal pipe connection outer wall protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the special-shaped metal tube, connector, upper reinforcement plate frame and other components of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the special-shaped metal tube and connector of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper reinforcement plate frame, the lower reinforcement plate frame and the flexible bonding film and other components of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the flexible laminating film, mounting plate, elastic rope and other components of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the top block, air cylinder, air guide pipe and other components of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the air cylinder, air guide tube, expansion block and other components of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the flexible laminating film, the pressing block and the elastic rope of the present invention.

[0026] Figure 9It is a schematic diagram of the three-dimensional structure of the components such as the extrusion block, the extrusion airbag and the exhaust pipe of the present invention.

[0027] Figure 10 It is a schematic diagram of the exploded three-dimensional structure of the extrusion block, the extrusion airbag and the exhaust pipe of the present invention.

[0028] Figure 11 It is a schematic diagram of the three-dimensional structure of the screws, mounting blocks and upper reinforcement plate frame of the present invention.

[0029] Markings in the accompanying drawings: 1-special-shaped metal tube, 11-connector, 12-upper reinforcement plate frame, 1201-lower reinforcement plate frame, 13-flexible bonding film, 14-screw, 15-mounting plate, 16-elastic rope, 2-top block, 21-air cylinder, 22-air guide tube, 23-expansion block, 3-pressing block, 31-elastic rope, 4-extrusion block, 41-extrusion airbag, 42-exhaust pipe, 5-screw, 51-mounting block. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] A segmented underwater special-shaped metal pipe joint outer wall protection device, such as Figure 1-Figure 5 As shown, it includes an upper reinforcement plate frame 12, a lower reinforcement plate frame 1201, a flexible bonding film 13, a screw 14, a mounting plate 15 and an elastic rope 16. The front and rear sides of the upper reinforcement plate frame 12 are rotatably connected with the screws 14 that are symmetrically distributed on the left and right. The lower reinforcement plate frame 1201 is threadedly connected between the four screws 14. The flexible bonding film 13 is fixed to the lower side of the upper reinforcement plate frame 12, and the flexible bonding film 13 is also fixed to the upper side of the lower reinforcement plate frame 1201. The flexible bonding film 13 is used to wrap the connector 11 between the two special-shaped metal tubes 1. The left and right sides of the upper reinforcement plate frame 12 are fixed with the mounting plates 15 that are symmetrically distributed on the front and back. The left and right sides of the lower reinforcement plate frame 1201 are also fixed with the mounting plates 15 that are symmetrically distributed on the front and back. An elastic rope 16 is fixed between the two corresponding front and rear mounting plates 15, and the elastic rope 16 is in contact with the adjacent flexible bonding film 13.

[0033] like Figure 4 and Figure 5 As shown, the flexible laminating film 13 is made of polyvinyl chloride.

[0034] When workers want to lay the special-shaped metal pipe 1 underwater, they need to first connect the segmented special-shaped metal pipe 1 through the connector 11, and then pass the connected special-shaped metal pipe 1 between the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201 until the connector 11 at the connection point of the special-shaped metal pipe 1 is between the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201. At this time, the screw 14 can be turned forward, so that the screw 14 rotates and moves downward, and drives the upper reinforcement plate frame 12 and other components to move downward together compared to the lower reinforcement plate frame 1201 until the upper reinforcement plate frame 12 contacts and fits with each other. During this period, the flexible bonding film 13 on the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201 will first contact the special-shaped metal pipe 1 and the connector 11 and be squeezed to deformation, and the elastic rope 16 will also be deformed and stretched, and the deformation of the flexible bonding film 13 can It can adapt to various shapes of special-shaped metal pipes 1 and customized connectors 11, and provide wrapped sealing protection for the connectors 11 and part of the metal pipes at the connection points, thereby effectively preventing the connectors 11 from being damaged and causing leakage under the impact, corrosion and pressure of seawater. The deformed elastic rope 16 can squeeze the left and right ends of the flexible bonding film 13 through its own elasticity, thereby improving the sealing between the left and right ends of the flexible bonding film 13 and the special-shaped metal pipe 1. When it is necessary to remove and replace the upper reinforcement plate frame 12 and other components, the screw 14 can be twisted in the opposite direction, so that the screw 14 rotates and moves upward, and drives the upper reinforcement plate frame 12 and other components to move upward together with the lower reinforcement plate frame 1201 until the screw 14 is separated from the lower reinforcement plate frame 1201, and the flexible bonding film 13 and the elastic rope 16 are also separated from the special-shaped metal pipe 1 and the connector 11 and return to their original state under the action of their own elasticity.

[0035] Example 2

[0036] On the basis of Example 1, Figure 6 and Figure 7 As shown, a sealing mechanism is also included, which is arranged on the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201. The sealing mechanism includes a top block 2, an air cylinder 21, an air guide pipe 22 and an expansion block 23. The four expansion blocks 23 are respectively fixed to the left and right sides of the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201. The front and rear sides of the upper reinforcement plate frame 12 are fixed with air cylinders 21 symmetrically distributed on the left and right sides. The front and rear sides of the lower reinforcement plate frame 1201 are also fixed with air cylinders 21 symmetrically distributed on the left and right sides. The piston rod of the air cylinder 21 is fixed with a top block 2, and the two corresponding top blocks 2 on the upper and lower sides are squeezed and fitted with each other. The cylinder body of the air cylinder 21 is fixed to and connected to the adjacent expansion block 23 with an air guide pipe 22.

[0037] When the worker drives the upper reinforcement plate frame 12 and other components downward compared to the lower reinforcement plate frame 1201 by forward screwing the screw 14, until the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201 contact and fit together, the two corresponding upper and lower top blocks 2 and the air cylinder 21 will also move toward each other until they fit together. During this period, the two corresponding upper and lower top blocks 2 will first contact and resist each other, while the cylinder bodies of the two corresponding upper and lower air cylinders 21 will still move toward each other. At this time, the piston rods of the top block 2 and the air cylinder 21 will slide relative to the cylinder body, and the gas in the air cylinder 21 will be injected into the expansion block 23 through the air guide pipe 22. The expansion block 23 then expands and squeezes the left and right sides of the flexible bonding film 13, so that the left and right sides of the flexible bonding film 13 can keep close contact with the various shapes of special-shaped metal tubes 1, thereby avoiding the left and right sides of the flexible bonding film 13 when they are bonded with the concave metal tube. When the worker reversely twists the screw 14 to make the upper reinforcement plate frame 12 and other components away from the lower reinforcement plate frame 1201, the expansion block 23 will return to its original shape under the action of its own elasticity and return the excess gas to the air cylinder 21 through the air guide pipe 22. The piston rod of the top block 2 and the air cylinder 21 will then move in the opposite direction and reset under the pressure of the gas.

[0038] like Figure 2 and Figure 8 As shown, it also includes a tightening mechanism, which is arranged on the flexible bonding film 13. The tightening mechanism includes a pressure block 3 and an elastic rope 31. The elastic ropes 31 distributed longitudinally in the front and rear are all fixed to the middle of the flexible bonding film 13. The elastic ropes 31 are fixed to the outside of the axially distributed pressure block 3, and the pressure block 3 is squeezed and fitted with the adjacent flexible bonding film 13.

[0039] like Figure 2 and Figure 8 As shown, the pressing block 3 is ellipsoidal.

[0040] When the flexible bonding film 13 contacts the special-shaped metal tube 1 and the connector 11 and is squeezed to deform, the elastic rope 31 is also stretched and deformed. Since there are multiple evenly distributed ellipsoidal pressure blocks 3 on the elastic rope 31, the elastic rope 31 usually does not directly contact the flexible bonding film 13 after deformation. Instead, the elastic force generated by its own deformation is applied to various parts of the flexible bonding film 13 through the ellipsoidal pressure blocks 3, thereby further improving the close contact effect between the flexible bonding film 13 and the connector 11 and the special-shaped metal tube 1, thereby effectively preventing seawater from seeping in and corroding the connector 11. When the flexible bonding film 13 separates from the special-shaped metal tube 1 and the connector 11 and returns to its original shape under the action of its own elasticity, the elastic rope 31 will also drive the pressure blocks 3 to return to their original shape under the action of its own elasticity.

[0041] like Figure 9 and Figure 10As shown, it also includes a fitting mechanism, which is arranged on the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201. The fitting mechanism includes an extrusion block 4, an extrusion airbag 41 and an exhaust pipe 42. The two extrusion airbags 41 are respectively fixed to the upper side of the upper reinforcement plate frame 12 and the lower side of the lower reinforcement plate frame 1201. The upper side of the upper reinforcement plate frame 12 is slidably connected to the extrusion block 4, and the lower side of the lower reinforcement plate frame 1201 is also slidably connected to the extrusion block 4. The extrusion block 4 is fixed to the adjacent extrusion airbag 41. The left and right sides of the middle of the upper reinforcement plate frame 12 are fixed. The sides are fixed with air outlet pipes 42 distributed longitudinally in the front and rear, and the left and right sides of the middle of the lower reinforcement plate frame 1201 are also fixed with air outlet pipes 42 distributed longitudinally in the front and rear, one end of the air outlet pipe 42 is fixedly connected to and connected with the adjacent extrusion airbag 41, the other end of the air outlet pipe 42 on the upper reinforcement plate frame 12 is connected to the cavity formed by the combination of the upper reinforcement plate frame 12 and the flexible bonding film 13, and the other end of the air outlet pipe 42 on the lower reinforcement plate frame 1201 is connected to the cavity formed by the combination of the lower reinforcement plate frame 1201 and the flexible bonding film 13.

[0042] When the special-shaped metal tube 1, the connector 11 and the upper reinforcement plate frame 12 are underwater, the flexible adhesive film 13 is kept tight under the squeeze of the special-shaped metal tube 1 and the connector 11 and is supported by the elastic rope 16 and the pressing block 3. Therefore, the flexible adhesive film 13 is not easy to be significantly deformed under the action of water pressure, and the squeezing blocks 4 on the upper and lower sides will move toward each other under the action of water pressure and squeeze the squeezing airbag 41, so that the gas in the squeezing airbag 41 is injected into the cavity formed by the upper reinforcement plate frame 12, the lower reinforcement plate frame 1201 and the flexible adhesive film 13 through the air outlet pipe 42, thereby increasing the volume inside the cavity. The air pressure makes the flexible bonding film 13 fit more tightly against the connector 11 and the special-shaped metal tube 1, thereby improving the sealing between the flexible bonding film 13, the connector 11 and the special-shaped metal tube 1, so as to prevent seawater from penetrating from the gap between the flexible bonding film 13 and the special-shaped metal tube 1 under the action of water pressure and corroding the connector 11. When the workers take the upper reinforcement plate frame 12 and other components out of the water, the extrusion airbag 41 will return to its original state under the action of the air pressure inside the chamber and draw back the excess gas in the chamber through the air outlet pipe 42. The extrusion blocks 4 on the upper and lower sides will also move backwards and reset under the action of the extrusion airbag 41.

[0043] like Figure 1 and Figure 11 As shown, it also includes a fixing mechanism, which is arranged on the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201. The fixing mechanism includes screws 5 and mounting blocks 51. The four mounting blocks 51 are respectively fixed to the left and right sides of the upper reinforcement plate frame 12 and the lower reinforcement plate frame 1201. The middle part of the mounting block 51 is threadedly connected with a screw 5.

[0044] When wrapping and sealing the connector 11 and part of the metal pipe with components such as the flexible bonding film 13, workers also need to turn the screws 5 in the forward direction, so that the two corresponding screws 5 on the upper and lower sides rotate and move toward each other until the two corresponding screws 5 on the upper and lower sides are in contact with and tightly attached to the surface of the special-shaped metal pipe 1. In this way, the upper reinforcement plate frame 12 and other components can be fixed at the connection of the special-shaped metal pipe 1 of various shapes with the help of the screws 5, thereby preventing the upper reinforcement plate frame 12 and other components from sliding relative to the special-shaped metal pipe 1 under the impact of seawater and affecting the protection effect.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A segmented underwater special-shaped metal pipe joint outer wall protection device, characterized in that: The invention comprises an upper reinforcement plate frame (12), a lower reinforcement plate frame (1201), a flexible laminating film (13), a screw rod (14), a mounting plate (15) and an elastic rope (16); the upper reinforcement plate frame (12) is rotatably connected to a pair of screw rods (14); the pair of screw rods (14) are threadedly connected to the lower reinforcement plate frame (1201); the upper reinforcement plate frame (12) is fixedly connected to the flexible laminating film (13); the lower reinforcement plate frame (1201) is fixedly connected to the upper reinforcement plate frame (1201); ) is also fixedly connected with a flexible adhesive film (13), and the flexible adhesive film (13) is used to wrap the connector (11) between the two special-shaped metal tubes (1). The upper reinforcement plate frame (12) is fixedly connected with a pair of mounting plates (15), and the lower reinforcement plate frame (1201) is also fixedly connected with a pair of mounting plates (15). Elastic ropes (16) are fixedly connected between the pairs of mounting plates (15), and the elastic ropes (16) are in contact with the flexible adhesive film (13).

2. A segmented underwater special-shaped metal pipe joint outer wall protection device according to claim 1, characterized in that: The flexible laminating film (13) is made of polyvinyl chloride.

3. A segmented underwater special-shaped metal pipe joint outer wall protection device according to claim 2, characterized in that: The invention also includes a sealing mechanism, which is arranged on the upper reinforcement plate frame (12) and the lower reinforcement plate frame (1201). The sealing mechanism includes a top block (2), a compressed air cylinder (21), an air guide pipe (22) and an expansion block (23). The paired expansion blocks (23) are respectively fixed to the upper reinforcement plate frame (12) and the lower reinforcement plate frame (1201). The upper reinforcement plate frame (12) is fixed with the paired compressed air cylinder (21). The lower reinforcement plate frame (1201) is also fixed with the paired compressed air cylinder (21). The piston rods of the compressed air cylinders (21) are fixed with the top blocks (2). The paired top blocks (2) are mutually extruded and matched. The cylinder body of the compressed air cylinder (21) and the expansion block (23) are fixedly connected and communicated with the air guide pipe (22).

4. A segmented underwater special-shaped metal pipe joint outer wall protection device according to claim 3, characterized in that: The invention also includes a tightening mechanism, which is arranged on the flexible laminating film (13). The tightening mechanism includes a pressure block (3) and an elastic rope (31). The elastic ropes (31) distributed longitudinally are all fixed to the flexible laminating film (13). The elastic ropes (31) are fixed to the pressure blocks (3) distributed axially. The pressure blocks (3) are extruded and matched with the flexible laminating film (13).

5. The segmented underwater special-shaped metal pipe connection outer wall protection device according to claim 4, characterized in that: The pressing block (3) is in the shape of an ellipsoid.

6. The segmented underwater special-shaped metal pipe connection outer wall protection device according to claim 5, characterized in that: The invention also includes a fitting mechanism, which is arranged on the upper reinforcement plate frame (12) and the lower reinforcement plate frame (1201). The fitting mechanism includes an extrusion block (4), an extrusion airbag (41) and an air outlet pipe (42). The pair of extrusion airbags (41) are respectively fixed to the upper reinforcement plate frame (12) and the lower reinforcement plate frame (1201). The upper reinforcement plate frame (12) is slidably connected to the extrusion block (4). The lower reinforcement plate frame (1201) is also slidably connected to the extrusion block (4). The extrusion block (4) is fixed to the extrusion airbag (41). The upper reinforcement plate frame (12) is fixed to the extrusion block (4). The lower reinforcement plate frame (1201) is also fixedly connected with a pair of longitudinally distributed air outlet pipes (42). One end of the air outlet pipe (42) is fixedly connected to and communicated with the extrusion airbag (41). The other end of the air outlet pipe (42) on the upper reinforcement plate frame (12) is communicated with a chamber formed by the combination of the upper reinforcement plate frame (12) and the flexible adhesive film (13). The other end of the air outlet pipe (42) on the lower reinforcement plate frame (1201) is communicated with a chamber formed by the combination of the lower reinforcement plate frame (1201) and the flexible adhesive film (13).

7. A segmented underwater special-shaped metal pipe joint outer wall protection device according to claim 6, characterized in that: The invention also includes a fixing mechanism, which is arranged on the upper reinforcement plate frame (12) and the lower reinforcement plate frame (1201). The fixing mechanism includes screws (5) and mounting blocks (51). The paired mounting blocks (51) are respectively fixed to the upper reinforcement plate frame (12) and the lower reinforcement plate frame (1201). The mounting blocks (51) are threadedly connected with the screws (5).

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