Throttle valve underwater removal tool

Abstract

The present invention discloses an underwater throttle valve removal tool, comprising a tool body, an outer guide cover for pre-installing on a throttle valve body, and an inner connecting tube for pre-installing on a throttle valve core, a guide structure is provided between the tool body and the outer guide cover, and the guide structure is used to enable the tool body to accurately dock with the outer guide cover at a preset angle; a primary locking mechanism is provided on the tool body, which is used to keep the tool body and the outer guide cover locked; the tool body is provided with a secondary locking mechanism that can be lifted up and down by a hydraulic cylinder, and when the tool body and the outer guide cover are locked, the hydraulic cylinder can drive the secondary locking mechanism to embed downward into the inner connecting tube, and the secondary locking mechanism is used to lock and connect with the inner connecting tube. The beneficial effects of the present invention are: the throttle valve core can be removed and installed underwater by adopting a reliable connection removal tool, and at the same time has the advantages of high reliability and high convenience.

Description

Technical Field

[0001] The invention relates to the technical field of deep-sea oil production, and in particular to an underwater throttle valve removal and installation tool. Background Art

[0002] The Christmas tree is a wellhead device used to extract oil in self-flowing wells and machine-drilling wells. It is the main equipment at the top of the oil and gas well to control and regulate oil and gas production.

[0003] The throttle valve is a key component used in Christmas trees. Its function is to adjust the oil flow and pressure during oil development operations. The core components of the throttle valve include the valve core, valve body, and the driver and electronic components integrated on the valve core. Christmas trees are in an underwater environment all year round. In order to ensure that the Christmas trees can operate stably and reliably for a long time underwater, the throttle valve needs regular maintenance and inspection.

[0004] At present, in order to meet the needs of underwater maintenance of throttle valves, the valve core of the throttle valve has been designed as a detachable structure. When maintenance and repair are required, it can be separated from the valve body and then removed from underwater with the help of a removal tool. As we all know, the underwater environment is very complex, especially the deep-sea environment for oil extraction. There are many unstable factors when divers operate tools underwater.

[0005] Therefore, it is extremely important to design an underwater retrieval tool that is easy to operate and has reliable connection to achieve the maintenance and inspection of the throttle valve core. Summary of the invention

[0006] In view of the above requirements, the present invention provides an underwater throttle valve removal and installation tool, which can complete the removal and installation of the throttle valve core underwater and has the advantages of high reliability and convenience.

[0007] To achieve the above purpose, the technical solution of the present invention is as follows:

[0008] A throttle valve underwater removal and installation tool, the key is that it includes:

[0009] An outer guide cover and an inner connecting tube, wherein the outer guide cover is used to be pre-installed on the throttle valve body, and the inner connecting tube is used to be pre-installed on the throttle valve core;

[0010] A tool body, wherein a guide structure is provided between the tool body and the outer guide cover, so as to enable the tool body to be accurately docked with the outer guide cover at a preset angle;

[0011] The tool body is provided with a primary locking mechanism, and when the tool body is docked with the outer guide cover, the primary locking mechanism is used to keep the tool body and the outer guide cover fixedly connected;

[0012] The tool body is equipped with a secondary locking mechanism which can be raised and lowered by a hydraulic cylinder. When the tool body and the outer guide cover are fixedly connected, the hydraulic cylinder can drive the secondary locking mechanism to be embedded downward into the inner connecting tube. The secondary locking mechanism is used to be locked and connected with the inner connecting tube.

[0013] Preferably: one end of the outer guide cover has a conical opening, the guide structure includes a guide protrusion arranged on the inner wall of the outer guide cover, the lower part of the tool body has a guide section adapted to the inner diameter of the outer guide cover, the upper part of the guide section has a conical ring adapted to the conical opening, the side is provided with a guide notch, the guide notch is an inverted V-shaped structure, the top position of the guide notch is provided with a guide groove, the guide groove is adapted to the guide protrusion, and after the tool body is docked with the outer guide cover, the conical ring can overlap with the conical opening.

[0014] Preferably: the conical opening and the conical ring are provided with a first locking hole and a second locking hole which can be opposite to each other and overlap, the primary locking mechanism comprises a turntable rotatably installed in the conical ring, and a locking pin slidably assembled in the second locking hole, the inner end of the locking pin is fixedly connected to a guide column extending downward, the position of the guide column corresponding to the turntable is provided with a strip hole, the guide column is slidably assembled in the strip hole, and the turntable is rotated, and the locking pin can slide in or out of the first locking hole under the interaction between the strip hole and the guide column.

[0015] Preferably: the outer edge of the conical ring is provided with bosses, and a screw extending vertically upward is mounted on the bosses. The upper part of the tool body is provided with a support plate, which is fixedly connected to the screw. The hydraulic cylinder is located at the center of the support plate, and includes a cylinder body extending vertically upward and a piston rod sliding up and down in the cylinder body. The lower end of the piston rod is connected to a secondary locking mechanism. When the primary locking mechanism completes the locking, the secondary locking mechanism can dock with and lock the inner connecting tube under the drive of the hydraulic cylinder.

[0016] Preferably, the turntable is a conical structure, a support platform is provided on the inner side of the conical ring, the lower end of the turntable is supported on the support platform, the upper end is in sliding contact with the lower side of the locking pin, and the strip hole is an arc hole obliquely arranged on the turntable.

[0017] Preferably, one end of the turntable is provided with a paddle protruding outward, and the conical ring is provided with an avoidance notch adapted to the paddle.

[0018] Preferably, a safety pin which can slide up and down is installed on the conical ring, a limiting hole which is adapted to the safety pin is provided on the paddle, a spring is abutted between the safety pin and the conical ring, and under the elastic thrust of the spring, the lower end of the safety pin can be embedded in the limiting hole.

[0019] Preferably: the secondary locking mechanism includes a seat body assembly and a driving cylinder body slidably connected to the seat body assembly up and down, the seat body assembly is provided with a support ring platform at the bottom, and an operating handle is provided at the top, and manipulating the operating handle can control the driving cylinder body to slide up and down; a deformation ring is mounted on the support ring platform, and a deformation notch is provided on one side of the deformation ring. During the downward sliding of the driving cylinder body, its lower end can force the deformation ring to expand radially outward, and after the lower end of the driving cylinder body leaves the deformation ring, the deformation ring can automatically shrink radially inward, and the inner connecting cylinder has a connecting through hole adapted to the lower part of the seat body assembly, and a recessed structure is provided on the side wall of the connecting through hole, and the recessed structure is used to accommodate the expanded deformation ring.

[0020] Preferably, the inner end of the operating handle is connected to a rotating disk, which is rotatably mounted on one side of the upper part of the seat assembly, a driving column is eccentrically arranged on the inner side of the rotating disk, an annular groove is arranged on the upper part of the driving cylinder, and the driving column is located in the annular groove.

[0021] Preferably, two rows of bosses are provided on the outer side of the deformation ring, chamfers are provided on the outer edges of the upper and lower ends of the bosses, and the recessed structure matches the bosses.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] By using the underwater throttle valve removal tool provided by the present invention, when the throttle valve core needs to be maintained and repaired, the outer guide cover and the inner connecting cylinder are first pre-installed on the throttle valve body and the valve core respectively, and then the tool body can be accurately docked with the outer guide cover through the guide structure. At this time, the docking part of the tool body and the outer guide cover is locked with the help of the primary locking mechanism to achieve a stable connection between the tool body and the throttle valve body; then the secondary locking mechanism is driven downward by the hydraulic cylinder to embed into the inner connecting cylinder, and the secondary locking mechanism can be locked with the inner connecting cylinder, that is, the tool body and the throttle valve core are locked, and then the primary locking mechanism is unlocked, and the valve core of the throttle valve can be taken out by lifting the tool body upwards through an external traction device. The operation process is convenient and quick, and it also has the advantage of good connection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the installation tool and the throttle valve when they are docked and locked;

[0025] Figure 2 It is an exploded schematic diagram of the tool body 3 before being inserted into the throttle valve outer guide cover 1;

[0026] Figure 3 It is a schematic diagram of the structure when the tool body 3 and the outer guide cover 1 are locked;

[0027] Figure 4It is a schematic structural diagram of the lower guide section 3a of the tool body 3;

[0028] Figure 5 Schematic diagram of the explosion and decomposition of the primary locking mechanism 4 (in this figure, the outer guide cover 1 only shows the part locked with the tool body 3, and the tool body 3 only shows the part locked with the conical opening 1a);

[0029] Figure 6 It is a cross-sectional view when the removal tool and the throttle valve are locked;

[0030] Figure 7 for Figure 6 A local enlarged schematic diagram of the H in the middle;

[0031] Figure 8 It is a structural schematic diagram of the secondary locking mechanism 5;

[0032] Fig. 9 It is an exploded schematic diagram of the secondary locking mechanism 5;

[0033] Fig.10 is a cross-sectional view of the secondary locking mechanism 5 (unlocked state);

[0034] Fig.11 is a cross-sectional view of the secondary locking mechanism 5 (locked state);

[0035] Fig.12 This is a reference diagram of the use state in which the secondary locking mechanism 5 locks the inner connecting tube 2 on the valve core. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with embodiments and drawings.

[0037] like Figure 1 and 2 As shown, a throttle valve underwater removal tool comprises a tool body 3, an outer guide cover 1 for pre-installation on a throttle valve body C, and an inner connecting tube 2 for pre-installation on a throttle valve core A. A guiding structure is provided between the tool body 3 and the outer guide cover 1, and the guiding structure is used to enable the tool body 3 to be accurately docked with the outer guide cover 1 at a preset angle; a primary locking mechanism 4 is provided on the tool body 3, and when the tool body 3 is docked with the outer guide cover 1, the primary locking mechanism 4 is used to keep the tool body 3 and the outer guide cover 1 locked; in combination with the attached Figure 6 It can be seen that the tool body 3 is equipped with a secondary locking mechanism 5 which can be raised and lowered by a hydraulic cylinder 6. When the tool body 3 and the outer guide cover 1 remain locked, the hydraulic cylinder 6 can drive the secondary locking mechanism 5 downward to embed into the inner connecting tube 2. The secondary locking mechanism 5 is used to lock and connect with the inner connecting tube 2.

[0038] Figure 2 and 6The schematic diagram of the structure of the throttle valve is shown. In specific applications, the valve core A of the throttle valve is detachably locked to the valve body C of the throttle valve through the clamp assembly B. The valve body C is pre-installed with an outer guide cover 1, and the upper end of the valve core A is pre-installed with an inner connecting tube 2. Based on the structural design of the underwater removal tool for the throttle valve, when the valve core A needs to be maintained and repaired, the specific operation of removing the valve core A underwater is as follows: first, under the action of the guiding structure, the tool body 3 is accurately docked with the outer guide cover 1 at a preset angle. When the tool body 3 is aligned with the outer guide cover 1, the tool body 3 is connected to the outer guide cover 1. After connection, start the first-level locking mechanism 4, which can keep the tool body 3 and the outer guide cover 1 locked. When the tool body 3 remains stable, the hydraulic cylinder 6 drives the secondary locking mechanism 5 downward to embed into the inner connecting tube 2, and then start the secondary locking mechanism 5, so that the secondary locking mechanism 5 and the inner connecting tube 2 remain in a locked state, that is, the tool body 3 and the valve core A are locked. At this time, unlock the first-level locking mechanism 4, open the clamp assembly B, and lift the tool body 3 upwards through an external traction device to remove the valve core A from the water.

[0039] Further, such as Figure 2 and 4 As shown, the upper end of the outer guide cover 1 has a conical opening 1a, the lower part of the tool body 3 has a guide section 3a adapted to the inner diameter of the outer guide cover 1, the upper part of the guide section 3a has a conical ring 3b adapted to the conical opening 1a, the guide structure includes a guide protrusion 1b arranged on the inner wall of the outer guide cover 1, the side of the guide section 3a is provided with a guide notch 3a1, the guide notch 3a1 is an inverted V-shaped structure, and the top position of the guide notch 3a1 is provided with a guide groove 3a2, which matches the guide protrusion 1b. When the tool body 3 is docked with the outer guide cover 1, as shown in FIG. Figure 3 As shown, under the guidance of the guide notch 3a1, the guide groove 3a2 will eventually fit on the guide protrusion 1b, thereby ensuring that the tool body 3 can enter the preset installation angle when docking with the outer guide cover 1, thereby ensuring the smooth progress of subsequent removal and installation work.

[0040] For further information, see Figure 4 In order to ensure that the guide section 3a can be more quickly embedded in the outer guide cover 1, the angle of the lower opening of the guide notch 3a1 is preferably greater than 90°. Figure 6 It can be seen that the guide protrusion 1b is constructed as a rectangular block, which is fixedly embedded in the side wall of the outer guide cover 1 and protrudes inward and outward at the same time. Such a design can ensure that the guide section 3a is more stably maintained in the outer guide cover 1.

[0041] When the tool body 3 enters the outer guide cover 1 according to the preset installation angle, the conical opening 1a overlaps with the conical ring 3b. In order to ensure that the tool body 3 and the outer guide cover 1 are fixedly connected, a primary locking mechanism 4 is required to lock the two. Figure 5The conical opening 1a and the conical ring 3b are provided with a first locking hole 1a1 and a second locking hole 3b1 which can be aligned with each other. The primary locking mechanism 4 includes a turntable 4a rotatably installed in the conical ring 3b, and a locking pin 4b slidably assembled in the second locking hole 3b1. A guide column 4b1 extending downward is fixedly connected to the inner end of the locking pin 4b. A strip hole 4a1 is provided at the position of the guide column 4b1 corresponding to the turntable 4a. The guide column 4b1 is slidably assembled in the strip hole 4a1. The turntable 4a is rotated. Under the interaction between the strip hole 4a1 and the guide column 4b1, the locking pin 4b moves radially along the second locking hole 3b1 and slides into the first locking hole 1a1, so that the conical opening 1a is locked and connected with the conical ring 3b, that is, the tool body 3 and the outer guide cover 1 are locked. The state during locking can be referred to as Figure 3 .

[0042] Conversely, when the primary locking mechanism 4 needs to be unlocked, the rotating disk 4a is rotated, and the locking pin 4b slides out of the first locking hole 1a1, and the lock can be unlocked. In this embodiment, the locking pin 4b, the guide column 4b1, the first locking hole 1a1, the second locking hole 3b1 and the strip hole 4a1 are all three groups, and correspond one to one.

[0043] Please refer to Figure 5 The inner end of the lock pin 4b is provided with a mounting hole 4b2, and the guide column 4b1 is assembled in the mounting hole 4b2, and the mounting hole 4b2 and the guide column 4b1 are interference fit. With such a design, when assembling the primary locking mechanism 4, the turntable 4a and the lock pin 4b are first installed, and then the guide column 4b1 is installed into the lock pin 4b, and the assembly process is simple and convenient. Figure 4 and 7 The turntable 4a is a conical structure, and the turntable 4a is in a vertical relationship with the conical ring 3b. A supporting platform 3b3 is provided on the inner side of the conical ring 3b. The lower end of the turntable 4a is supported on the supporting platform 3b3, and the upper end is in sliding contact with the lower side of the locking pin 4b. With this design, the turntable 4a can be stably installed on the conical ring 3b, and the locking pin 4b can limit the upward movement of the turntable 4a.

[0044] In order to improve the smoothness of the guide column 4b1 sliding in the strip hole 4a1, as shown in FIG. Figure 5 As shown, the strip hole 4a1 is an arc hole obliquely arranged on the turntable 4a, the right end of the arc hole is close to the center of the turntable 4a, and the left end is far away from the center of the turntable 4a. When the device is not locked, the guide column 4b1 is located at the right end of the strip hole 4a1. The turntable is rotated counterclockwise, and the guide column 4b1 slides from the right end to the left end of the strip hole 4a1, forcing the locking pin 4b to slide into the first locking hole 1a1, thereby realizing the locking of the tapered opening 1a and the tapered ring 3b. The locked state can be referred to Figure 1 .

[0045] like Figure 5As shown, one end of the turntable 4a is provided with a pick 4a2 protruding outward, and the conical ring 3b is provided with an avoidance notch 3b2 adapted to the pick 4a2. Figure 3 , a strip-shaped notch 1c is provided on the side wall of the outer guide cover 1, and the avoidance notch 3b2 is located in the strip-shaped notch 1c, and the staff can rotate the turntable 4a by operating the paddle 4a2. Further, the open end of the upper part of the conical ring 3b is provided with an annular platform 3b4 surrounding it in the circumferential direction, and the annular platform 3b4 is provided with a guide hole 3b5, and a safety pin 7 that can slide up and down is installed in the guide hole 3b5, and the paddle 4a2 is provided with a limit hole a adapted to the safety pin 7, and a spring 7a is abutted between the safety pin 7 and the conical ring 3b. When the conical ring 3b is locked with the conical opening 1a, the safety pin 7 is pressed downward, and under the elastic thrust of the spring 7a, the lower end of the safety pin 7 can be embedded in the limit hole a, so as to realize the locking of the turntable 4a, and avoid the turntable 4a from rotating due to the accidental operation of the paddle 4a2 after the device is locked, thereby enhancing the stability and safety of the device. When unlocking is required, the safety pin 7 is pulled upwards, and the lower end of the safety pin 7 leaves the limiting hole a, so that the rotating disk 4a can be unlocked.

[0046] In order to facilitate the staff to pull out the safety pin 7, in the present embodiment, the safety pin 7 is a T-shaped structure, and a positioning block 7b with a conical structure is provided at the lower end of the safety pin 7. The cross-section of the lower end of the positioning block 7b is smaller than the cross-section of the upper end, and the cross-section of the upper end of the positioning block 7b is the same as the cross-section of the lower end of the safety pin 7. With such a design, when the turntable 4a needs to be locked, the safety pin 7 is pressed downward, and the positioning block 5b at its lower end can enable the safety pin 7 to be more accurately inserted into the limiting hole a.

[0047] Please refer to Figure 1 and 2 The outer edge of the conical ring 3b is provided with three groups of bosses 3c, each group of bosses 3c is equipped with a screw rod 3d extending vertically upward, and the upper part of the tool body 3 is provided with a support plate 3e, which is fixedly connected to the screw rod 3d. The structure adopted by the tool body 3 has the advantages of light weight, good operability and easy production and manufacturing.

[0048] Combination Figure 6 It can be seen that the hydraulic cylinder 6 passes through the center of the support plate 3e, and includes a cylinder body 6a extending vertically upward and a piston rod 6b sliding up and down in the cylinder body 6a. The lower end of the piston rod 6b is connected to a secondary locking mechanism 5. When the tool body 3 and the outer guide cover 1 are locked, the hydraulic cylinder 6 is started to drive the piston rod 6b to move vertically, thereby driving the secondary locking mechanism 5 to dock and lock the inner connecting tube 2.

[0049] In this embodiment, the specific implementation structure of the secondary locking mechanism 5 is as follows:

[0050] like Figure 8 and 9As shown, the secondary locking mechanism 5 includes a seat assembly 5a, a drive cylinder 5b and an operating handle 5a2, wherein the secondary locking mechanism 5 includes a seat assembly 5a, a drive cylinder 5b and an operating handle 5a2. Fig.10 An annular chamber 5a4 is provided inside the seat assembly 5a, and the driving cylinder 5b is connected in the annular chamber 5a4 so as to be slidable up and down. The operating handle 5a2 is used to control the driving cylinder 5b to slide up and down in the seat assembly 5a.

[0051] In this embodiment, the inner end of the operating handle 5a2 is connected to a rotating disk 5a3, and the rotating disk 5a3 is rotatably assembled on one side of the upper part of the seat assembly 5a. A driving column b is eccentrically arranged on the inner side of the rotating disk 5a3, and an annular groove 5b1 is arranged on the upper part of the driving cylinder 5b, and the driving column b is located in the annular groove 5b1. Based on this, when the user rotates the operating handle 5a2, since the driving column b is eccentrically arranged on the inner side of the rotating disk 5a3, the rotating process of the operating handle 5a2 can drive the driving cylinder 5b to slide up and down.

[0052] Re-attend Fig.10 The lower part of the seat assembly 5a is provided with a supporting ring 5a1, and the supporting ring 5a1 is provided with a deforming ring 5c, which is a metal component with elasticity. Fig. 9 It can be seen that a deformation notch 5c1 is provided on one side of the deformation ring 5c. When the driving cylinder 5b slides downward, the lower end of the driving cylinder 5b can force the deformation ring 5c ​​to expand radially outward. After the lower end of the driving cylinder 5b leaves the deformation ring 5c, the deformation ring 5c ​​can automatically contract radially inward. Fig. 9 and 10 The inner connecting tube 2 has a connecting through hole 2a adapted to the lower portion of the seat assembly 5a, and a recessed structure 2b is provided on the side wall of the connecting through hole 2a, and the recessed structure 2b is used to accommodate the expanded deformation ring 5c.

[0053] Based on the above design, the specific operation method of the secondary locking mechanism 5 and the valve core A is as follows: Figure 6 The seat assembly 5a is fixedly assembled on the lower end of the piston rod 6b through the connecting assembly D, and then combined with the attached Fig.10 and 12 , driven by the hydraulic cylinder 6, the lower part of the seat assembly 5a is first inserted into the connecting through hole 2a of the inner connecting tube 2, and then the diver turns the operating handle 5a2 to drive the cylinder 5b to move downward. This process causes the deformation ring 5c ​​to expand radially outward and fit into the recessed structure 2b of the inner connecting tube 2. At this time, please refer to Fig.11 As shown, the seat assembly 5a and the inner connecting tube 2 are locked in the vertical direction, that is, the tool body 3 and the valve core A of the throttle valve are locked. Thereafter, the first-level locking mechanism 4 is unlocked, and the valve core A can be taken out of the water by lifting the tool body 3 upwards through an external traction device.

[0054] In this embodiment, if Fig.10As shown, in the initial state, there is a gap c between the deformable ring 5c ​​and the lower part of the driving cylinder 5b, and the lower part of the driving cylinder 5b has a guide portion 5b2, and the guide portion 5b2 is located in the gap c. The inner side of the upper end of the deformable ring 5c ​​is provided with a guide flare 5c3, and the upper end of the guide portion 5b2 is provided with a flare guide slope d inclined outward. Based on this, during the downward movement of the driving cylinder 5b, the flare guide slope d and the guide flare 5c3 interact with each other, so that the deformable ring 5c ​​can expand outward. Furthermore, a receiving groove e adapted to the lower end of the guide portion 5b2 is provided at the root of the support ring 5a1. When the secondary locking mechanism 5 is in a locked state, please refer to Fig.11 The guide portion 5b2 just enters the receiving groove e, which can ensure that the driving cylinder 5b moves downward without obstruction.

[0055] In order to ensure that the deformable ring 5c ​​can be more reliably embedded in the side wall of the inner connecting tube 2, two rows of bosses 5c2 are provided on the outer side of the deformable ring 5c, and chamfers are provided at the outer edges of the upper and lower ends of the bosses 5c2. The recessed structure 2b has two rows of grooves f, and the two rows of grooves f match the two rows of bosses 5c2 and correspond one to one.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A throttle valve underwater removal tool, characterized in that: include: An outer guide cover (1) and an inner connecting tube (2), wherein the outer guide cover (1) is used to be pre-installed on a throttle valve body, and the inner connecting tube (2) is used to be pre-installed on a throttle valve core; A tool body (3), wherein a guide structure is provided between the tool body (3) and the outer guide cover (1), and is used to enable the tool body (3) to be accurately docked with the outer guide cover (1) at a preset angle; The tool body (3) is provided with a primary locking mechanism (4), and when the tool body (3) and the outer guide cover (1) are docked, the primary locking mechanism (4) is used to keep the tool body (3) and the outer guide cover (1) fixedly connected; The tool body (3) is provided with a secondary locking mechanism (5) so as to be able to be raised and lowered by means of a hydraulic cylinder (6); when the tool body (3) and the outer guide cover (1) are fixedly connected, the hydraulic cylinder (6) can drive the secondary locking mechanism (5) to be embedded downward into the inner connecting tube (2); the secondary locking mechanism (5) is used to be locked and connected with the inner connecting tube (2); The outer guide cover (1) has a conical opening (1a) at one end, the guide structure comprises a guide protrusion (1b) arranged on the inner wall of the outer guide cover (1), the lower part of the tool body (3) has a guide section (3a) adapted to the inner diameter of the outer guide cover (1), the upper part of the guide section (3a) has a conical ring (3b) adapted to the conical opening (1a), and the side part is provided with a guide notch (3a1), the guide notch (3a1) is in an inverted V-shaped structure, and the top position of the guide notch (3a1) is provided with a guide groove (3a2), the guide groove (3a2) is adapted to the guide protrusion (1b), and after the tool body (3) and the outer guide cover (1) are docked, the conical ring (3b) and the conical opening (1a) can be overlapped; the conical opening A first locking hole (1a1) and a second locking hole (3b1) that can be aligned and overlapped are provided on the opening (1a) and the conical ring (3b); the primary locking mechanism (4) comprises a rotating disk (4a) rotatably mounted in the conical ring (3b), and a locking pin (4b) slidably assembled in the second locking hole (3b1); a guide column (4b1) extending downward is fixedly connected to the inner end of the locking pin (4b); a strip hole (4a1) is provided at the position of the guide column (4b1) corresponding to the rotating disk (4a); the guide column (4b1) is slidably assembled in the strip hole (4a1); and the rotating disk (4a) is rotated. Under the interaction between the strip hole (4a1) and the guide column (4b1), the locking pin (4b) can slide into or out of the first locking hole (1a1); The turntable (4a) is a conical structure, a support platform (3b3) is provided on the inner side of the conical ring (3b), the lower end of the turntable (4a) is supported on the support platform (3b3), and the upper end is in sliding contact with the lower side of the locking pin (4b), and the strip hole (4a1) is an arc hole obliquely arranged on the turntable (4a); one end of the turntable (4a) is provided with a paddle (4a2) protruding outward, and the conical ring (3b) is provided with an avoidance notch (3b2) adapted to the paddle (4a2).

2. The throttle valve underwater removal tool according to claim 1, characterized in that: The outer edge of the conical ring (3b) is provided with a boss (3c), and a screw (3d) extending vertically upward is mounted on the boss (3c). The upper part of the tool body (3) is provided with a support plate (3e), and the support plate (3e) is fixedly connected to the screw (3d). The hydraulic cylinder (6) is located at the center of the support plate (3e), and comprises a cylinder body (6a) extending vertically upward and a piston rod (6b) sliding up and down in the cylinder body (6a). The lower end of the piston rod (6b) is connected to a secondary locking mechanism (5). When the primary locking mechanism (4) completes locking, the secondary locking mechanism (5) can dock with and lock the inner connecting tube (2) under the drive of the hydraulic cylinder (6).

3. The underwater throttle valve removal tool according to claim 1 is characterized in that: The conical ring (3b) is provided with a safety pin (7) which can slide up and down, the paddle (4a2) is provided with a limiting hole (a) adapted to the safety pin (7), a spring (7a) is abutted between the safety pin (7) and the conical ring (3b), and under the elastic thrust of the spring (7a), the lower end of the safety pin (7) can be embedded in the limiting hole (a).

4. The throttle valve underwater removal tool according to claim 2, characterized in that: The secondary locking mechanism (5) comprises a seat assembly (5a) and a driving cylinder (5b) slidably connected to the seat assembly (5a) up and down, the seat assembly (5a) having a supporting ring platform (5a1) at the bottom and an operating handle (5a2) at the top, and the operating handle (5a2) can be manipulated to control the driving cylinder (5b) to slide up and down; a deformation ring (5c) is sleeved on the supporting ring platform (5a1), and a deformation notch (5c1) is provided on one side of the deformation ring (5c); When the driving cylinder (5b) slides downward, its lower end can force the deformation ring (5c) to expand radially outward; after the lower end of the driving cylinder (5b) leaves the deformation ring (5c), the deformation ring (5c) can automatically contract radially inward; the inner connecting cylinder (2) has a connecting through hole (2a) adapted to the lower part of the seat assembly (5a); a recessed structure (2b) is provided on the side wall of the connecting through hole (2a); the recessed structure (2b) is used to accommodate the expanded deformation ring (5c).

5. The underwater throttle valve removal tool according to claim 4 is characterized in that: The inner end of the operating handle (5a2) is connected to a rotating disk (5a3), the rotating disk (5a3) is rotatably mounted on one side of the upper portion of the seat assembly (5a), a driving column (b) is eccentrically arranged on the inner side of the rotating disk (5a3), an annular groove (5b1) is arranged on the upper portion of the driving cylinder (5b), and the driving column (b) is located in the annular groove (5b1).

6. The underwater throttle valve removal tool according to claim 4 is characterized in that: Two rows of bosses (5c2) are provided on the outer side of the deformation ring (5c), chamfers are provided at the outer edges of the upper and lower ends of the bosses (5c2), and the recessed structure (2b) matches the bosses (5c2).

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