CN219819557U - A get dress instrument for dismouting choke valve case under water - Google Patents

Abstract

The utility model discloses a fetching and loading tool for underwater dismounting a throttle valve core, which comprises a tool main body, an outer guide cover and an inner connecting cylinder, wherein the outer guide cover is used for being pre-loaded on a throttle valve body, the inner connecting cylinder is used for being pre-loaded on the throttle valve core, a guide structure is arranged between the tool main body and the outer guide cover, and the guide structure is used for enabling the tool main body to be in accurate butt joint with the outer guide cover according to a preset angle; the tool main body is provided with a primary locking mechanism which is used for keeping the tool main body and the outer guide cover locked; the tool main body can be vertically provided with a secondary locking mechanism in a lifting manner through the hydraulic oil cylinder, and after the tool main body and the outer guide cover are kept locked, the hydraulic oil cylinder can drive the secondary locking mechanism to be downwards embedded into the inner connecting cylinder, and the secondary locking mechanism is used for being locked and connected with the inner connecting cylinder. The beneficial effects of the utility model are as follows: the connecting and reliable taking and loading tool is adopted, so that the taking and loading of the valve core of the throttle valve can be completed underwater, and meanwhile, the device has the advantages of being strong in reliability and high in convenience.

Description

A get dress instrument for dismouting choke valve case under water

Technical Field

The utility model relates to the technical field of deep sea oil extraction, in particular to a taking and loading tool for underwater dismounting and mounting of a throttle valve core.

Background

The christmas tree is a wellhead device for exploiting petroleum, such as a self-injection well, a mechanical production well, etc., and is a main device for controlling and regulating the oil and gas production at the uppermost part of an oil and gas well.

The throttle valve is a key component for the christmas tree, and is used for adjusting the oil outlet flow and pressure in petroleum exploitation operation. The core element of the throttle valve comprises a valve core, a valve body, a driver, an electronic component and the like which are integrated on the valve core. The christmas tree is in an underwater environment throughout the year, and in order to ensure that the christmas tree can stably and reliably run under water for a long time, a throttle valve has the requirements of regular maintenance and overhaul.

Currently, in order to meet the requirement of underwater maintenance of a throttle valve, a valve core of the throttle valve has been designed into a detachable structure, and when maintenance and maintenance are required, the valve core can be separated from a valve body and then removed from the water by means of a removing tool. As is well known, underwater environments are quite complex, particularly deep sea environments where oil is produced, and there are a number of instabilities in the underwater operation of tools by divers.

Therefore, the design of the underwater easy-to-operate and reliable-connection taking and loading tool realizes maintenance and overhaul of the valve core of the throttle valve, and has extremely important function.

Disclosure of Invention

Aiming at the above requirements, the utility model provides a fetching and loading tool for underwater dismounting and mounting of a throttle valve core, which can finish fetching and loading of the throttle valve core underwater and has the advantages of high reliability and high convenience.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a get dress instrument that is used for dismouting choke valve case under water, its key lies in, includes:

an outer guide housing for preassembling on the throttle valve body and an inner connecting cylinder for preassembling on the throttle valve core;

the tool comprises a tool main body, wherein a guide structure is arranged between the tool main body and an outer guide cover and used for enabling the tool main body to be in accurate butt joint with the outer guide cover according to a preset angle;

the tool main body is provided with a primary locking mechanism, and after the tool main body is in butt joint with the outer guide cover, the primary locking mechanism is used for keeping the tool main body and the outer guide cover fixedly connected;

the tool main body can be vertically provided with a secondary locking mechanism in a lifting manner through the hydraulic oil cylinder, and after the tool main body and the outer guide cover are fixedly connected, the hydraulic oil cylinder can drive the secondary locking mechanism to be downwards embedded into the inner connecting cylinder, and the secondary locking mechanism is used for being in locking connection with the inner connecting cylinder.

As preferable: the utility model discloses a tool, including outer guide cover, instrument main part, outer guide cover one end has the toper uncovered, guide structure is including setting up the direction lug on outer guide cover inner wall, instrument main part lower part has the direction section that suits with outer guide cover internal diameter, direction section upper portion has the toper ring that suits with the toper uncovered, and the lateral part is equipped with the guide notch, the guide notch is the structure of falling V type, guide notch top position is equipped with the guide way, this guide way with the direction lug suits, and after instrument main part and the outer guide cover butt joint, can make toper ring and the uncovered coincidence of toper.

As preferable: the conical opening and the conical ring are provided with a first lock hole and a second lock hole which can be just opposite to each other, the primary locking mechanism comprises a rotary table which is rotatably installed in the conical ring, and a lock pin which is slidably assembled in the second lock hole, a guide post which extends downwards is fixedly connected at the inner end of the lock pin, a strip-shaped hole is arranged at the position of the guide post corresponding to the rotary table, the guide post is slidably assembled in the strip-shaped hole, the rotary table is rotated, and the lock pin can slide into or slide out of the first lock hole under the interaction between the strip-shaped hole and the guide post.

As preferable: the conical ring is characterized in that supporting bodies are distributed on the outer edges of the conical ring, screw rods extending vertically upwards are assembled on the supporting bodies, supporting plates are arranged on the upper portion of the tool main body and fixedly connected with the screw rods, the hydraulic oil cylinder is located at the center of the supporting plates and comprises a cylinder body extending vertically upwards and a piston rod sliding up and down in the cylinder body, the lower end of the piston rod is connected with a secondary locking mechanism, and after the primary locking mechanism is locked, the secondary locking mechanism can be abutted to and locked with the inner connecting cylinder under the driving of the hydraulic oil cylinder.

As preferable: the rotary table is of a conical structure, a supporting platform is arranged on the inner side of the conical ring, the lower end of the rotary table is supported on the supporting platform, the upper end of the rotary table is in sliding contact with the lower side of the lock pin, and the strip-shaped hole is an arc-shaped hole obliquely arranged on the rotary table.

As preferable: one end of the rotary disc is provided with a poking piece protruding outwards, and the conical ring is provided with an avoidance gap which is adaptive to the poking piece.

As preferable: the safety pin capable of sliding up and down is arranged on the conical ring, a limiting hole which is matched with the safety pin is formed in the poking plate, a spring is abutted between the safety pin and the conical ring, and the lower end of the safety pin can be embedded into the limiting hole under the action of elastic thrust of the spring.

As preferable: the secondary locking mechanism comprises a seat body assembly and a driving cylinder body which is connected in the seat body assembly in a vertical sliding manner, a supporting ring table is arranged at the lower part of the seat body assembly, and an operating handle is arranged at the upper part of the seat body assembly, and the operating handle is controlled to control the driving cylinder body to slide up and down; the support ring bench is sleeved with a deformation ring, one side of the deformation ring is provided with a deformation notch, the lower end of the deformation ring can be forced to expand outwards along the radial direction in the process of downwards sliding of the driving cylinder body, the deformation ring can automatically shrink inwards along the radial direction after the lower end of the driving cylinder body leaves the deformation ring, the inner connection cylinder is provided with a connection through hole which is matched with the lower part of the seat body assembly, and the side wall of the connection through hole is provided with a concave structure which is used for accommodating the expanded deformation ring.

As preferable: the inner end of the operating handle is connected with a rotating disc, the rotating disc is rotatably installed on one side of the upper portion of the seat body assembly, a driving column is eccentrically arranged on the inner side of the rotating disc, an annular groove is formed in the upper portion of the driving cylinder body, and the driving column is located in the annular groove.

As preferable: the outer side of deformation ring is equipped with two rows of bosss, the outer edge department at both ends all is equipped with the chamfer about the boss, the concave structure with boss assorted.

Compared with the prior art, the utility model has the beneficial effects that:

when the tool for taking and installing the valve core of the underwater dismounting throttle valve is needed to be maintained and overhauled, the outer guide cover and the inner connecting cylinder are respectively preassembled on the valve body and the valve core of the throttle valve, and then the tool main body can be accurately abutted with the outer guide cover through the guide structure, and the abutting part of the tool main body and the outer guide cover is locked by the primary locking mechanism at the moment, so that the tool main body and the valve body of the throttle valve are stably connected; then the second-stage locking mechanism is driven by the hydraulic oil cylinder to be embedded into the inner connecting cylinder downwards, the second-stage locking mechanism can be locked with the inner connecting cylinder, namely, the tool main body and the throttle valve core are locked, the first-stage locking mechanism is unlocked, the tool main body is lifted upwards through external traction equipment, the valve core of the throttle valve can be taken out, the operation process is convenient and rapid, and meanwhile, the advantage of good connection reliability is achieved.

Drawings

FIG. 1 is a schematic view of a structure when a take-up tool is locked in butt joint with a throttle valve;

fig. 2 is an exploded schematic view of the tool body 3 before insertion of the throttle outer guide housing 1;

fig. 3 is a schematic view of the structure of the tool body 3 when locked with the outer guide cover 1;

fig. 4 is a schematic view of the structure of the lower guide section 3a of the tool body 3;

fig. 5 is an exploded schematic view of the primary locking mechanism 4 (in this figure, the outer guide cover 1 shows only a portion locked with the tool body 3, and the tool body 3 shows only a portion locked with the tapered opening 1 a);

FIG. 6 is a cross-sectional view of the tool in locking with the throttle valve;

FIG. 7 is an enlarged partial schematic view of H in FIG. 6;

fig. 8 is a schematic structural view of the secondary locking mechanism 5;

fig. 9 is an exploded view of the secondary locking mechanism 5;

fig. 10 is a sectional view of the secondary lock mechanism 5 (unlocked state);

fig. 11 is a sectional view (locked state) of the secondary lock mechanism 5;

fig. 12 is a reference view showing a state of use in which the two-stage locking mechanism 5 locks the inner cylinder 2 on the spool.

Detailed Description

The utility model is further described below with reference to examples and figures.

As shown in fig. 1 and 2, a taking and loading tool for underwater dismounting a throttle valve core comprises a tool main body 3, an outer guide cover 1 for being pre-loaded on a throttle valve body C, and an inner connecting cylinder 2 for being pre-loaded on the throttle valve core a, wherein a guide structure is arranged between the tool main body 3 and the outer guide cover 1 and is used for enabling the tool main body 3 to be accurately abutted with the outer guide cover 1 according to a preset angle; the tool main body 3 is provided with a primary locking mechanism 4, and after the tool main body 3 is in butt joint with the outer guide cover 1, the primary locking mechanism 4 is used for keeping the tool main body 3 and the outer guide cover 1 locked; as can be seen from fig. 6, the tool body 3 is provided with a secondary locking mechanism 5 capable of being lifted up and down by means of a hydraulic cylinder 6, and when the tool body 3 and the outer guide cover 1 are kept locked, the hydraulic cylinder 6 can drive the secondary locking mechanism 5 to be embedded into the inner connecting cylinder 2 downwards, and the secondary locking mechanism 5 is used for being locked and connected with the inner connecting cylinder 2.

Fig. 2 and 6 show a schematic structural diagram of a throttle valve, in specific application, a valve core a of the throttle valve is detachably locked on a valve body C of the throttle valve through a hoop assembly B, an outer guide cover 1 is preloaded on the valve body C, an inner connecting cylinder 2 is preloaded on the upper end of the valve core a, based on the above structural design of a taking and loading tool, when the valve core a needs to be maintained and overhauled, the specific operation of taking the valve core a under water is as follows: firstly, under the effect of a guide structure, the tool main body 3 is accurately abutted with the outer guide cover 1 according to a preset angle, after the tool main body 3 is abutted with the outer guide cover 1, the primary locking mechanism 4 is started, the tool main body 3 and the outer guide cover 1 can be kept locked, under the condition that the tool main body 3 is kept stable, the secondary locking mechanism 5 is driven by the hydraulic cylinder 6 to be downwards embedded into the inner connecting cylinder 2, then the secondary locking mechanism 5 is started, the secondary locking mechanism 5 and the inner connecting cylinder 2 are kept in a locking state, namely, the tool main body 3 and the valve core A are locked, at the moment, the primary locking mechanism 4 is unlocked, the hoop assembly B is opened, and the tool main body 3 is lifted upwards through external traction equipment, so that the valve core A can be taken out of the water surface.

Further, as shown in fig. 2 and 4, the upper end of the outer guiding cover 1 is provided with a conical opening 1a, the lower part of the tool main body 3 is provided with a guiding section 3a which is matched with the inner diameter of the outer guiding cover 1, the upper part of the guiding section 3a is provided with a conical ring 3b which is matched with the conical opening 1a, the guiding structure comprises a guiding convex block 1b which is arranged on the inner wall of the outer guiding cover 1, the side part of the guiding section 3a is provided with a guiding notch 3a1, the guiding notch 3a1 is in an inverted V-shaped structure, the top position of the guiding notch 3a1 is provided with a guiding groove 3a2, and the guiding groove 3a2 is matched with the guiding convex block 1 b. When the tool main body 3 is in butt joint with the outer guide cover 1, as shown in fig. 3, under the guiding action of the guiding notch 3a1, the guiding groove 3a2 is finally sleeved on the guiding convex block 1b, so that the tool main body 3 can enter a preset installation angle when in butt joint with the outer guide cover 1, and further, the follow-up smooth proceeding of the picking and loading work is ensured.

Still further, referring to fig. 4, in order to ensure that the guide section 3a can be more quickly inserted into the outer guide housing 1, the angle of the lower opening of the guide notch 3a1 is preferably more than 90 °, and in combination with fig. 6, it can be seen that the guide projection 1b is configured as a rectangular block, which is fixedly inserted into the side wall of the outer guide housing 1 and protrudes inward and outward at the same time, so that the guide section 3a can be ensured to be more stably maintained in the outer guide housing 1.

When the tool body 3 enters the outer guide cover 1 according to a preset installation angle, the conical opening 1a is overlapped with the conical ring 3b, and 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 tool body and the outer guide cover 1. Referring to fig. 5, a first lock hole 1a1 and a second lock hole 3b1 which can be aligned and overlapped are arranged on a conical opening 1a and a conical ring 3b, a primary locking mechanism 4 comprises a rotary disc 4a rotatably arranged in the conical ring 3b, and a locking pin 4b slidably assembled in the second lock hole 3b1, a downward extending guide post 4b1 is fixedly connected at the inner end of the locking pin 4b, a strip-shaped hole 4a1 is arranged at the position of the guide post 4b1 corresponding to the rotary disc 4a, the guide post 4b1 is slidably assembled in the strip-shaped hole 4a1, the rotary disc 4a rotates, the locking pin 4b radially moves along the second lock hole 3b1 under the interaction between the strip-shaped hole 4a1 and the guide post 4b1, and slides into the first lock hole 1a1, so that the conical opening 1a is in locking connection with the conical ring 3b, namely, the tool main body 3 and the outer guide cover 1 are locked, and the locking state can be referred to fig. 3.

On the contrary, when the primary locking mechanism 4 needs to be unlocked, the rotary table 4a is rotated, and the lock pin 4b slides out of the first lock hole 1a1, so that unlocking can be realized. In this embodiment, the lock pin 4b, the guide post 4b1, the first lock hole 1a1, the second lock hole 3b1 and the bar-shaped hole 4a1 are all three groups and correspond to each other one by one.

Referring to fig. 5, the inner end of the locking pin 4b is provided with a mounting hole 4b2, the guide post 4b1 is assembled in the mounting hole 4b2, and the mounting hole 4b2 is in interference fit with the guide post 4b1, so that when the primary locking mechanism 4 is assembled, the rotating disc 4a and the locking pin 4b are firstly installed, and then the guide post 4b1 is installed in the locking pin 4b, so that the assembly process is simple and convenient. Referring again to fig. 4 and 7, the turntable 4a has a conical structure, the turntable 4a is vertically connected with the conical ring 3b, a supporting platform 3b3 is arranged 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, so that the turntable 4a can be stably mounted on the conical ring 3b, and meanwhile, the locking pin 4b can limit the turntable 4a to move upwards.

In order to improve the smoothness of sliding of the guide post 4b1 in the bar-shaped hole 4a1, as shown in fig. 5, the bar-shaped hole 4a1 is an arc-shaped hole obliquely arranged on the turntable 4a, the right end of the arc-shaped hole is close to the center of the turntable 4a, the left end of the arc-shaped hole is far away from the center of the turntable 4a, when the device is not locked, the guide post 4b1 is positioned at the right end of the bar-shaped hole 4a1, the turntable is rotated anticlockwise, the guide post 4b1 slides from the right end to the left end of the bar-shaped hole 4a1, the lock pin 4b is forced to slide into the first lock hole 1a1, and the locking of the conical opening 1a and the conical ring 3b is realized.

As shown in fig. 5, one end of the rotary disk 4a is provided with an outwardly protruding pulling piece 4a2, the conical ring 3b is provided with an avoidance gap 3b2 adapted to the pulling piece 4a2, and in combination with fig. 3, the side wall of the outer guide cover 1 is provided with a strip gap 1c, the avoidance gap 3b2 is located in the strip gap 1c, and a worker can rotate the rotary disk 4a by operating the pulling piece 4a 2. Further, an annular table 3b4 surrounding the annular table 3b in the circumferential direction is arranged at the open end of the upper part of the conical ring 3b, a guide hole 3b5 is formed in the annular table 3b4, a safety pin 7 capable of sliding up and down is arranged in the guide hole 3b5, a limit hole a corresponding to the safety pin 7 is formed in the poking piece 4a2, and a spring 7a is abutted between the safety pin 7 and the conical ring 3 b. After the conical ring 3b is locked with the conical opening 1a, the safety pin 7 is pressed downwards, the lower end of the safety pin 7 can be embedded into the limit hole a under the action of elastic thrust of the spring 7a, locking of the rotary disc 4a is achieved, the rotary disc 4a is rotated due to accidental operation of the poking piece 4a2 after the device is locked, and stability and safety of the device are enhanced. When unlocking is needed, the safety pin 7 is lifted upwards, and the lower end of the safety pin 7 leaves the limiting hole a, so that the rotary disc 4a can be unlocked.

For convenience of workers drawing the safety pin 7, in the embodiment, the safety pin 7 is of a T-shaped structure, a positioning block 7b of a conical structure is arranged at the lower end of the safety pin 7, the cross section of the lower end of the positioning block 7b is smaller than that of the upper end, the cross section of the upper end of the positioning block 7b is identical to that of the lower end of the safety pin 7 in size, and when the turntable 4a needs to be locked, the safety pin 7 is pressed downwards, and the positioning block 5b at the lower end of the safety pin can enable the safety pin 7 to be inserted into the limiting hole a more accurately.

Referring to fig. 1 and 2, three sets of supporting bodies 3c are distributed along the outer edge of the conical ring 3b, each set of supporting bodies 3c is provided with a screw 3d extending vertically upwards, the upper part of the tool main body 3 is provided with a supporting disc 3e, and the supporting disc 3e is fixedly connected with the screw 3 d. The tool body 3 has the advantages of light weight, good operability and easy production and manufacture.

As can be seen in connection with fig. 6, the hydraulic cylinder 6 penetrates through the center of the supporting disc 3e, and comprises a cylinder body 6a extending vertically upwards and a piston rod 6b sliding up and down in the cylinder body 6a, the lower end of the piston rod 6b is connected with the secondary locking mechanism 5, and when the tool main body 3 is kept locked with the outer guide cover 1, the hydraulic cylinder 6 is started to drive the piston rod 6b to vertically move, so that the secondary locking mechanism 5 is driven to be in butt joint with and locked with the inner connecting cylinder 2.

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

as shown in fig. 8 and 9, the secondary locking mechanism 5 includes a seat assembly 5a, a driving cylinder 5b and an operating handle 5a2, wherein, in conjunction with fig. 10, an annular chamber 5a4 is provided inside the seat assembly 5a, the driving cylinder 5b is slidably connected in the annular chamber 5a4 up and down, and the operating handle 5a2 is used for controlling the driving cylinder 5b to slide up and down in the seat assembly 5 a.

In this embodiment, the inner end of the operating handle 5a2 is connected with a rotating disc 5a3, the rotating disc 5a3 is rotatably assembled 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 disc 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 5b 1. Based on this, the user rotates the operation handle 5a2, and since the driving post b is eccentrically disposed inside the rotating disk 5a3, the operation handle 5a2 can drive the driving cylinder 5b to slide up and down during the rotation.

Referring to fig. 10 again, a support ring table 5a1 is provided at the lower part of the seat body assembly 5a, a deformation ring 5c is sleeved on the support ring table 5a1, the deformation ring 5c is a metal member having elasticity, and referring to fig. 9 again, a deformation notch 5c1 is provided at one side of the deformation ring 5c, during the downward sliding process of the driving cylinder 5b, the lower end of the driving cylinder 5b can force the deformation ring 5c to expand outwards along the radial direction, and after the lower end of the driving cylinder 5b leaves the deformation ring 5c, the deformation ring 5c can automatically contract inwards along the radial direction. Referring again to fig. 9 and 10, the inner connecting cylinder 2 has a connecting through hole 2a corresponding to the lower portion of the seat assembly 5a, and a recess structure 2b is provided on a sidewall of the connecting through hole 2a, the recess structure 2b being for accommodating the expanded deformation ring 5c.

Based on the design, the specific operation mode of the locking connection between the secondary locking mechanism 5 and the valve core A is as follows: referring to fig. 6, the seat assembly 5a is fixedly assembled at the lower end of the piston rod 6b through the connection assembly D, and then, with reference to fig. 10 and 12, the lower portion of the seat assembly 5a is first inserted into the connection through hole 2a of the inner connection cylinder 2 under the driving of the hydraulic cylinder 6, and then, the diver rotates the operation handle 5a2 to drive the cylinder 5b to move downward, so that the deformation ring 5c expands radially outwards and is embedded in the concave structure 2b of the inner connection cylinder 2. At this time, referring to fig. 11, the seat assembly 5a and the inner coupling cylinder 2 are locked in the vertical direction, that is, the tool body 3 and the valve core a of the throttle valve are locked, and then the primary locking mechanism 4 is unlocked, and the tool body 3 is lifted up by the external traction device to take the valve core a out of the water.

In this embodiment, as shown in fig. 10, in the initial state, a gap c is formed between the deformation ring 5c and the lower portion of the driving cylinder 5b, a guide portion 5b2 is formed at the lower portion of the driving cylinder 5b, the guide portion 5b2 is located in the gap c, a guide flare 5c3 is formed at the inner side of the upper end of the deformation ring 5c, and a flare guide slope d inclined outward is formed at the upper end of the guide portion 5b 2. Based on this, during the downward movement of the drive cylinder 5b, the flared guide slope d and the guide flare 5c3 interact, and the deformation ring 5c can thus be expanded outwardly. Further, a receiving groove e adapted to the lower end of the guiding portion 5b2 is provided at the root portion of the supporting ring table 5a1, and when the secondary locking mechanism 5 is in a locked state, referring to fig. 11, the guiding portion 5b2 just enters the receiving groove e, so that the downward movement of the driving cylinder 5b can be ensured not to be blocked.

In order to ensure that the deformation ring 5c can be embedded in the side wall of the inner connecting cylinder 2 more reliably, two rows of bosses 5c2 are arranged on the outer side of the deformation ring 5c, chamfer angles are arranged at the outer edges of the upper end and the lower end of the boss 5c2, the concave structure 2b is provided with two rows of grooves f, and the two rows of grooves f are matched with the two rows of bosses 5c2 and correspond to each other one by one.

Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (10)

1. A get dress instrument for dismouting choke valve case under water, characterized by, include:

an outer guide cover (1) and an inner connecting cylinder (2), wherein the outer guide cover (1) is used for being preassembled on a throttle valve body, and the inner connecting cylinder (2) is used for being preassembled on a throttle valve core;

the tool comprises a tool main body (3), wherein a guide structure is arranged between the tool main body (3) and an outer guide cover (1) and is used for enabling the tool main body (3) to be in accurate butt joint with the outer guide cover (1) according to a preset angle;

the tool body (3) is provided with a primary locking mechanism (4), and after the tool body (3) is in butt joint with the outer guide cover (1), the primary locking mechanism (4) is used for keeping the tool body (3) and the outer guide cover (1) fixedly connected;

the tool body (3) is provided with a secondary locking mechanism (5) in a lifting manner through a hydraulic oil cylinder (6), after the tool body (3) and the outer guide cover (1) are fixedly connected, the hydraulic oil cylinder (6) can drive the secondary locking mechanism (5) to be embedded into the inner connecting cylinder (2) downwards, and the secondary locking mechanism (5) is used for being locked and connected with the inner connecting cylinder (2).

2. The take-up tool for underwater dismounting the throttle valve core according to claim 1, wherein: the utility model discloses a tool is characterized in that a conical opening (1 a) is formed in one end of an outer guide cover (1), the guide structure comprises a guide lug (1 b) arranged on the inner wall of the outer guide cover (1), a guide section (3 a) which is matched with the inner diameter of the outer guide cover (1) is arranged at the lower part of a tool main body (3), a conical ring (3 b) which is matched with the conical opening (1 a) is arranged at the upper part of the guide section (3 a), a guide notch (3 a 1) is arranged at the side part, the guide notch (3 a 1) is in an inverted V-shaped structure, a guide groove (3 a 2) is formed in the top position of the guide notch (3 a 1), the guide groove (3 a 2) is matched with the guide lug (1 b), and the conical ring (3 b) is overlapped with the conical opening (1 a) after the tool main body (3) is butted with the outer guide cover (1).

3. The take-up tool for underwater dismounting the throttle valve core according to claim 2, wherein: the tapered opening (1 a) and the tapered ring (3 b) are provided with a first lock hole (1 a 1) and a second lock hole (3 b 1) which can be just opposite to each other, the primary locking mechanism (4) comprises a rotary table (4 a) which is rotatably arranged in the tapered ring (3 b) and a lock pin (4 b) which is slidably assembled in the second lock hole (3 b 1), the inner end of the lock pin (4 b) is fixedly connected with a guide post (4 b 1) which extends downwards, the position of the guide post (4 b 1) corresponding to the rotary table (4 a) is provided with a strip-shaped hole (4 a 1), the guide post (4 b 1) is slidably assembled in the strip-shaped hole (4 a 1), the rotary table (4 a) is rotated, and the lock pin (4 b) can slide into or slide out of the first lock hole (1 a 1) under the interaction between the strip-shaped hole (4 a 1) and the guide post (4 b 1).

4. The take-up tool for underwater dismounting the throttle valve core according to claim 2, wherein: the conical ring (3 b) is characterized in that a supporting body (3 c) is distributed on the outer edge of the conical ring (3 b), a screw rod (3 d) extending vertically upwards is assembled on the supporting body (3 c), a supporting disc (3 e) is arranged on the upper portion of the tool main body (3), the supporting disc (3 e) is fixedly connected with the screw rod (3 d), the hydraulic cylinder (6) is located in the center of the supporting disc (3 e), the conical ring comprises a cylinder body (6 a) extending vertically upwards and a piston rod (6 b) sliding up and down in the cylinder body (6 a), the lower end of the piston rod (6 b) is connected with a secondary locking mechanism (5), and after the primary locking mechanism (4) is locked, the secondary locking mechanism (5) can be in butt joint with the inner connecting cylinder (2) under the driving of the hydraulic cylinder (6).

5. The take-up tool for underwater dismounting the throttle valve core according to claim 3, wherein: the rotary table (4 a) is of a conical structure, a supporting platform (3 b 3) is arranged on the inner side of the conical ring (3 b), the lower end of the rotary table (4 a) is supported on the supporting platform (3 b 3), the upper end of the rotary table is in sliding contact with the lower side of the lock pin (4 b), and the strip-shaped hole (4 a 1) is an arc-shaped hole obliquely arranged on the rotary table (4 a).

6. The take-up tool for underwater dismounting the throttle valve core according to claim 3, wherein: one end of the rotary disc (4 a) is provided with a poking piece (4 a 2) protruding outwards, and the conical ring (3 b) is provided with an avoidance notch (3 b 2) which is matched with the poking piece (4 a 2).

7. The removing and installing tool for underwater dismounting the throttle valve core according to claim 6, wherein: the safety pin (7) capable of sliding up and down is arranged on the conical ring (3 b), a limiting hole (a) which is matched with the safety pin (7) is formed in the poking piece (4 a 2), a spring (7 a) is abutted between the safety pin (7) and the conical ring (3 b), and the lower end of the safety pin (7) can be embedded into the limiting hole (a) under the action of elastic thrust of the spring (7 a).

8. The removing and installing tool for underwater dismounting the throttle valve core according to claim 4, wherein: the secondary locking mechanism (5) comprises a seat body assembly (5 a) and a driving cylinder body (5 b) which is connected in the seat body assembly (5 a) in a vertically sliding manner, a supporting ring table (5 a 1) is arranged at the lower part of the seat body assembly (5 a), an operating handle (5 a 2) is arranged at the upper part of the seat body assembly, and the operating handle (5 a 2) is controlled to control the driving cylinder body (5 b) to slide vertically; the support ring table (5 a 1) is sleeved with a deformation ring (5 c), one side of the deformation ring (5 c) is provided with a deformation notch (5 c 1), the lower end of the drive cylinder (5 b) can force the deformation ring (5 c) to expand outwards along the radial direction in the process of sliding downwards, the lower end of the drive cylinder (5 b) leaves the deformation ring (5 c), the deformation ring (5 c) can automatically retract inwards along the radial direction, the inner connection cylinder (2) is provided with a connection through hole (2 a) which is matched with the lower part of the seat body assembly (5 a), the side wall of the connection through hole (2 a) is provided with a concave structure (2 b), and the concave structure (2 b) is used for accommodating the expanded deformation ring (5 c).

9. The take-up tool for underwater dismounting the throttle valve spool as claimed in claim 8, wherein: the inner end of the operating handle (5 a 2) is connected with a rotating disc (5 a 3), the rotating disc (5 a 3) is rotatably arranged on one side of the upper portion of the seat body assembly (5 a), a driving column (b) is eccentrically arranged on the inner side of the rotating disc (5 a 3), an annular groove (5 b 1) is formed in the upper portion of the driving cylinder body (5 b), and the driving column (b) is located in the annular groove (5 b 1).

10. The take-up tool for underwater dismounting the throttle valve spool as claimed in claim 8, wherein: the outer side of deformation ring (5 c) is equipped with two rows of boss (5 c 2), the outer edge department at both ends about boss (5 c 2) all is equipped with the chamfer, concave structure (2 b) with boss (5 c 2) assorted.