CN114738540A

CN114738540A - But recovery type choke valve under long distance high-efficient drive water

Info

Publication number: CN114738540A
Application number: CN202210663640.5A
Authority: CN
Inventors: 米立军; 范白涛; 王名春; 王彬; 张会增; 王武海; 于小涛; 仝刚; 姚旺
Original assignee: Beijing Research Center of CNOOC China Ltd; CNOOC China Ltd
Current assignee: Beijing Research Center of CNOOC China Ltd; CNOOC China Ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-07-12
Anticipated expiration: 2042-06-14
Also published as: CN114738540B

Abstract

The invention relates to a long-distance high-efficiency driving underwater recoverable throttle valve which comprises a valve body assembly, a valve core assembly and a recovering tool assembly, wherein the valve body assembly is arranged on the valve core assembly; the valve core assembly is installed on the valve body assembly, the valve core comprises a driver assembly, a valve rod, a plunger and a cage sleeve, the output end of the driver assembly is connected with the valve rod, the valve rod is connected with the plunger, the valve rod drives the plunger to move up and down along the cage sleeve along the axial direction, a plurality of flow regulating holes are symmetrically distributed on the excircle of the cage sleeve, and the plunger moves up and down to regulate the flow area of the flow holes in the cage sleeve so as to realize the pressure and flow regulation of the throttle valve; the recovery tool is detachably connected with the valve core assembly and is used for installing and fixing the valve core assembly on the valve body or detaching the valve core from the valve body. The long-distance high-efficiency driving underwater recoverable throttle valve is installed on the outer side of a production channel of a Christmas tree and used for controlling medium flow in an oil-gas well and stabilizing medium pressure.

Description

But recovery type choke valve under long distance high-efficient drive water

Technical Field

The invention relates to the technical field of petroleum drilling and production equipment, in particular to a long-distance high-efficiency driving underwater recyclable throttle valve.

Background

The underwater Christmas tree is widely applied to the exploitation process of an underwater oil-gas field and is extremely important equipment in the oil exploitation process. The underwater recoverable throttle valve is one of main parts of an underwater Christmas tree, is positioned in a production channel of the Christmas tree, and has the main functions of adjusting the flow of a production medium, stabilizing the pressure of the medium, controlling the energy of an oil-gas layer, prolonging the flowing period, optimizing the production of an oil-gas well and the like.

The underwater throttle valve is a complex system integrating machine, electricity and liquid, has poor service working condition, has the functions of resisting external seawater pressure and seawater corrosion, remote control, electric signal transmission, data feedback and the like while requiring realization of accurate flow regulation.

The conventional deepwater underwater throttle valve and the control system are integrated on the underwater Christmas tree, the distance between the throttle valve and the control system is short, usually 3-4 m, an oil return pipeline is short, and oil return can be directly discharged to the sea. A recoverable choke for shallow water, usually separate from the control system, which is installed in the subsea manifold at a distance of 20-50 m from the choke; meanwhile, according to the requirement of environmental protection, permission that oil return is not allowed to be discharged from the sea exists in the shallow sea area, and the oil return is required to return to the offshore platform which is several kilometers away from the throttle valve. The conventional deep water throttle valve oil cylinder has small spring elasticity, cannot meet the working condition requirement of shallow water long-distance oil return, and has low switching efficiency.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a long-distance high-efficiency driving underwater recyclable throttle valve to solve the problems that the existing deep water throttle valve has smaller spring elasticity, cannot meet the working condition requirement of shallow water long-distance oil return and has low switching efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

the technical scheme of the invention provides a long-distance high-efficiency driving underwater recoverable throttle valve, which comprises a valve body assembly, a valve core assembly and a recovering tool assembly;

the valve core assembly is detachably mounted on the valve body assembly and comprises a driver assembly, a valve rod, a plunger and a cage sleeve, the driver assembly comprises a driver shell and a driving mechanism mounted in the driver shell, the cage sleeve is fixedly connected to the bottom of the driver shell, the output end of the driving mechanism is connected with the valve rod, the valve rod is connected with the plunger, the valve rod drives the plunger to move up and down along the cage sleeve, a plurality of flow regulating holes are symmetrically distributed on the excircle of the cage sleeve, and the plunger moves up and down to regulate the overflow area of the flow regulating holes in the cage sleeve so as to realize the pressure and flow regulation of the throttle valve;

the recovery tool assembly is detachably connected with the valve core assembly and is used for installing and fixing the valve core assembly on the valve body assembly or disassembling the valve core assembly from the valve body assembly;

the driving mechanism comprises an upper supporting plate, a lower supporting plate, an oil cylinder supporting plate vertically installed on the lower supporting plate, a first oil cylinder and a second oil cylinder symmetrically installed on the oil cylinder supporting plate, a driving main shaft, a driving main gear, a first transmission mechanism and a second transmission mechanism, wherein the upper supporting plate and the lower supporting plate are arranged at intervals up and down;

the first transmission mechanism and the second transmission mechanism are identical in structure, and the first transmission mechanism comprises a piston, a driving arm, a pawl fixing pin, a torsion spring, a limiting release pin and a spring mechanism;

the piston is connected with the cylinder wall of the first oil cylinder in a sealing and sliding mode, the front end of the piston is connected with one end of the driving arm, the other end of the driving arm is connected with the spring mechanism, the spring mechanism is used for providing resilience force for the contraction of the driving arm, and the piston is used for pushing the driving arm to move in the horizontal direction;

the pawl passes through the pawl fixed pin rotates to be installed on the actuating arm, the torsional spring cover is established on the pawl fixed pin, be used for promoting the pawl with the meshing of drive master gear, the actuating arm promotes drive master gear clockwise turning, the spacing round pin that breaks away from of pawl is installed in the hydro-cylinder backup pad, be used for when the actuating arm resets the pawl breaks away from the drive master gear.

Furthermore, the valve body assembly comprises a valve body and a positioning guide cylinder, the positioning guide cylinder is arranged on one side of the valve body and is used for being matched with a guide post at the bottom of the valve core assembly, and the cage sleeve and the plunger are inserted into the valve body to realize pressure and flow regulation of the throttle valve.

Further, spring mechanism includes spring support plate and installs spring unit in the spring support plate, spring support plate with set up relatively between the hydro-cylinder backup pad, spring unit includes interior spring and the outer spring that the endotheca was established, the one end fixed mounting of interior spring and outer spring in the spring support plate, the other end with actuating arm looks butt is used for the shrink of actuating arm provides the resilience force.

Further, still include third drive mechanism, the bottom of driving main shaft with pass through between the valve rod the transmission of third drive mechanism is connected, third drive mechanism includes valve-stem nut, valve rod crossover sub and direction body, direction body fixed mounting be in the bottom of backup pad down, valve rod crossover sub cover is established this internal and edge of direction the body slides from top to bottom, valve-stem nut with the bottom of driving main shaft is passed through the key-type connection, valve rod crossover sub cover is established in the valve-stem nut and with valve-stem nut screw thread transmission is connected, valve rod crossover sub's bottom with the top of valve rod is connected, the driving main shaft rotates and drives valve-stem nut, valve rod crossover sub and valve rod reciprocate.

Further, still include valve rod sealing device, valve rod sealing device includes valve gap, valve rod seal and valve rod seal packing gland, valve gap fixed mounting be in the bottom of driver casing, the valve rod cover is established in the valve gap, the top of valve rod with valve rod crossover sub connects, the bottom with the plunger is connected, valve rod seal and valve rod seal packing gland equal fixed mounting be in the valve gap and the cover establish the outside of valve rod, the bottom pressure of valve rod seal packing gland establishes the valve rod seal.

Further, the lower end of the valve cover is also provided with an annular valve cover metal seal, the valve cover is sealed with the valve body through the valve cover metal seal, and the valve cover metal seal is supported by a seal support ring arranged at the bottom end of the valve cover.

The hot stab hydraulic pipeline is characterized by further comprising a hot stab hydraulic pipeline, a hot stab plug and a hot stab socket, wherein one end of the hot stab hydraulic pipeline is communicated with a sealing area formed between the valve cover metal seal and the valve body, the other end of the hot stab hydraulic pipeline is connected with the hot stab plug, and the hot stab plug is inserted into the hot stab socket to verify the sealing performance.

The flow control valve further comprises a valve cover joint, a plunger joint sealing sleeve and a cage sleeve protecting sleeve, wherein the valve cover joint is fixed at the bottom end of the valve cover;

the valve rod penetrates through the valve cover connector, the bottom of the valve rod is fixedly connected with the plunger connector, the bottom end of the plunger connector is fixedly connected with the plunger, the plunger connector sealing sleeve is fixedly sleeved in the valve cover connector, and the plunger connector sealing sleeve is in sealing sliding connection with the plunger connector.

Furthermore, the valve core assembly further comprises a valve core guide ring and a valve core guide support ring, the valve core guide support ring is fixed at the bottom end of the cage sleeve protective sleeve, and the valve core guide ring is fixed on the valve core guide support ring.

Furthermore, a pressure balance hole is formed in the plunger joint, and a pressure balance seal is formed between the pressure balance hole and the plunger joint sealing sleeve.

Furthermore, the valve core assembly also comprises a hoop connector assembly, the hoop connector assembly is used for the detachable connection between the valve core assembly and the valve body assembly, the hoop connector assembly comprises a hoop support plate arranged on the valve cover, and a first interface body, a driving body, a parallel coupler, a locking bolt, a first hoop body, a second hoop body, a third hoop body, a first hoop pin shaft, a second hoop pin shaft and two third hoop pin shafts arranged on the hoop support plate, wherein the two ends of the locking bolt are respectively provided with a positive thread and a negative thread, the first hoop pin shaft and the second hoop pin shaft are respectively sleeved on the positive thread and the negative thread, the driving body is rotatably arranged on the inner wall of the first interface body through a thrust bearing, the output end of the driving body is connected with the locking bolt through the parallel coupler, the one end of first clamp body with first clamp round pin axle rotates even, the other end with rotate through a third clamp round pin axle between third clamp body and the clamp backup pad and connect, the one end of second clamp body with second clamp round pin axle rotates and connects, the other end with rotate through another third clamp round pin axle between third clamp body and the clamp backup pad and connect, first clamp body, second clamp body and third clamp body embrace the periphery wall of valve body.

Further, the clamp connector assembly further comprises two marine organism-proof corrugated sheaths, wherein the two marine organism-proof corrugated sheaths are respectively sleeved at two ends of the locking bolt, one end of the marine organism-proof corrugated sheath is connected with the first interface body, the other end of the marine organism-proof corrugated sheath is connected with the first clamp pin shaft, and the other end of the marine organism-proof corrugated sheath is connected with the far end of the locking bolt and the other end of the marine organism-proof corrugated sheath is connected with the second clamp pin shaft.

Furtherly, the interval is formed with first spacing groove and second spacing groove in the clamp backup pad, the top of first clamp round pin axle and second clamp round pin axle is followed respectively first spacing groove and second spacing inslot stretch out.

Further, the driver casing includes driver upper cover, driver lower cover and driver body, the case assembly still includes pressure compensation mechanism, pressure compensation mechanism installs in the driver casing, pressure compensation mechanism includes pressure compensator and crossover sub, pressure compensator includes that rubber diaphragm and cover establish the steel casing outside the rubber diaphragm, the closed cavity that the rubber diaphragm formed, the bottom of steel casing is through the sealed switch-on marine medium of crossover sub and pressure, crossover sub fixed mounting is in on the driver lower cover, the interface switch-on at rubber diaphragm top hydraulic oil in the driver casing.

Furthermore, the valve core assembly further comprises an override device, the override device comprises a second interface body formed on the upper cover of the driver, an override rod joint and an override rod, the override rod joint is fixedly installed at the center of the second interface, the top end of the override rod is connected with the override rod joint, the bottom end of the override rod is connected with the driving main shaft, and the second interface is driven to rotate through external force so as to drive the override rod and the driving main shaft to rotate.

Furthermore, the valve core assembly further comprises an anti-reverse driving device, the anti-reverse driving device is installed on the upper cover of the driver and comprises an anti-reverse driving device body and a plurality of ball plungers, the anti-reverse driving device body is sleeved on the outer side of the over-control rod, a plurality of installation grooves are formed in the anti-reverse driving device body along the circumferential direction in an array mode, one ball plunger is installed in each installation groove, a plurality of V-shaped grooves are formed in the outer wall of the driving main shaft in an array mode, and the balls of the ball plungers extend into the V-shaped grooves and are matched with the V-shaped grooves.

Furthermore, the valve core assembly further comprises an LVDT electro-wetting joint, a linear displacement sensor and a mandrel adapter, the LVDT electro-wetting joint is fixedly mounted on the upper cover of the driver, the bottom end of the LVDT electro-wetting joint is electrically connected with the linear displacement sensor, the linear displacement sensor is connected with the valve rod adapter through the mandrel adapter, a wet male plug is formed outside the LVDT electro-wetting joint, and the wet male plug is connected with a corresponding wet female plug at the christmas tree end and is used for transmitting an LVDT current signal to a control system.

Furthermore, the throttle valve still includes aperture detection device under water, aperture detection device under water includes planetary transmission, follow-up master gear, follows driving wheel, indicator lever and aperture calibrated scale, planetary transmission installs on the driver casing, planetary transmission's output shaft with the indicator lever is connected, follow driving wheel fixed mounting on planetary transmission's input shaft, follow driving wheel with follow-up action wheel meshing transmission, follow-up master gear fixed mounting be in on the drive shaft, follow-up master gear with the drive master gear separates, the indicator lever rotates and drives the pointer in the aperture calibrated scale internal rotation

Further, the recovery tool assembly comprises a top plate, an inner liquid guide cylinder, an outer guide cylinder, a lifting lug and two symmetrically-installed handle mechanisms, the lifting lug is arranged at the top of the top plate, the inner liquid guide cylinder and the outer guide cylinder which are sleeved inside and outside are fixedly arranged at the bottom of the top plate, through holes are correspondingly formed on the liquid inner guide cylinder and the outer guide cylinder, the two handle mechanisms are symmetrically arranged on the outer side of the outer guide cylinder, the handle mechanism comprises a guide cylinder flange, a lifting pin, a guide cylinder, a handle shaft and a handle, the guide cylinder is fixedly arranged on the outer guide cylinder through the guide cylinder flange, the lifting pin and the handle shaft sleeve are arranged in the guide cylinder, one end of the guide cylinder is connected with the handle shaft, the other end of the guide cylinder is just opposite to the through holes in the liquid on the guide cylinder and the outer guide cylinder, and the far end of the handle extends out of the guide cylinder and is connected with the handle.

Furthermore, retrieve the instrument assembly and still include two navigation keys, two the navigation key symmetry is installed on the inside wall of outer guide cylinder, be used for right guide cylinder carries out the location installation in the liquid.

Due to the adoption of the technical scheme, the invention has the following advantages:

1. the outer cage sleeve and the plunger of the throttling element are made of hard alloy, so that the throttling element is high in hardness, strong in erosion resistance and long in service life, and is suitable for the working condition of a high-sand-content medium.

2. And in the plunger balance design, the plunger is sealed with the inner hole of the cage sleeve through the upper end sealing sleeve, and when the throttle valve is in zero opening or in a very small opening, the plunger is acted downwards by balanced upstream pressure. The plunger passes through the plunger to connect to be fixed with the valve rod, and the plunger connects the inside design of taking balance hole, and when the throttle valve was opened the back, pressure leads to the plunger upper end through the balance hole, and pressure about the balanced plunger makes pressure act on the less area of valve rod, avoids acting on the great area of plunger below, makes throttle valve operate steadily, and the operating torque is little.

3. The valve core bottom direction design, the guide ring adopts the PEEK material, prevents that the valve core from installing the valve body under water in, and the sealed face of case fish tail valve body.

4. The design of cage cover protective sheath, protective sheath of cage cover external design prevents that great piece of rock from washing away the carbide cage cover in the medium, improves cage cover life. Meanwhile, the length of the throttling opening is increased through the protective sleeve, and the throttling and pressure reducing capacity of the throttling valve is improved.

5. The special hole site of case designs, and the orifice is complete symmetry, makes the medium pass through the cage, and its energy offsets each other and weakens, reduces the medium and to the erosion of low reaches, and the noise is little, shakes for a short time.

6. The high-driving-efficiency driver is designed to increase the oil return pressure of the oil cylinder and shorten the oil return time of the oil cylinder, and the high driving efficiency of the driver is mainly realized by the following two special designs.

(1) The resilience of the spring is increased by adopting a double-spring design for the driver, so that the spring has enough driving force to push the control oil in the oil cylinder back to the hydraulic pump system several kilometers away.

(2) Reducing the oil return pipeline pressure resistance: the design of a short-stroke and small-diameter driving oil cylinder has the advantages that the piston diameter is 24mm, the stroke is 38mm, the oil cylinder discharge capacity is as small as 17mL, and the area of the oil cylinder is designed to be the minimum while sufficient driving force is generated. The oil return speed in an oil return pipeline for several kilometers is reduced, the pressure resistance of the oil return pipeline is reduced, and the oil return time of the oil cylinder is shortened.

7. The high integrated form case design, the case assembly has integrateed driver assembly, valve gap, clamp connector, valve gap metal seal, and simple structure is compact, realizes that driver, valve gap, the whole recovery of throttle original paper and installation.

8. The design is suitable for recovery and installation operation of divers. The clamp connector is provided with a Class 4 torsion tool operation interface, and a diver can complete the operation of locking or unlocking the clamp connector through the Class 4 torsion tool; the hydraulic joint and the LVDT wet joint of the electric signal also adopt the joints operated by the diver, the diver can simply utilize the recovery operation tool, and the whole operations of recovery, installation, measurement and the like can be realized.

9. And (5) remote opening monitoring design. The driver is internally provided with a submerged linear displacement sensor, the displacement of the valve rod is accurately detected, 4-20mA corresponds to 0-100% opening of the throttle valve, and the opening of the throttle valve is calibrated by detecting current, so that the remote monitoring of the opening of the throttle valve is realized, and the condition that the opening of the throttle valve is confirmed by a diver or ROV launching is avoided.

10. The anti-back-driving design of the driver is adopted, the anti-back-driving device is arranged in the driver, and the anti-back-driving device is provided with 6 steel ball spring plungers which are clamped in a V-shaped groove in the upper end of the driving main shaft, so that certain rotation resistance is provided, and the driving main shaft is prevented from being reversed to influence the driving performance and efficiency in the rebounding process of the pawl.

11. The valve core is provided with a hot stab socket. The valve core assembly comprises a socket with a hot stab, the outside of the metal seal of the valve cover is provided with an O-shaped sealing ring, the hot stab socket is connected to the outside of the metal seal of the valve cover and the sealed space of the outside O-shaped sealing ring through a hydraulic pipeline and a joint, after the valve core is installed on the valve body, the sealing performance of the sealed installation of the valve cover can be verified through pressing from the hot stab, the probability of unqualified sealing after the sealed installation of the valve cover is reduced, and the risk of secondary installation is reduced.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a long-distance high-efficiency driving underwater recoverable throttle valve of the invention;

FIG. 2 is a front view of a throttle body assembly;

FIG. 3 is a front view of the retrievable valve cartridge assembly;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 3; .

FIG. 6 is a cross-sectional view taken at C-C of FIG. 5;

FIG. 7 is an enlarged partial view taken at D in FIG. 3;

FIG. 8 is an enlarged partial view at E in FIG. 3;

FIG. 9 is a side view of the retrievable valve cartridge assembly;

FIG. 10 is a partial view F of FIG. 9;

FIG. 11 is a sectional view taken at G-G of FIG. 9;

FIG. 12 is a top view of the retrievable valve cartridge assembly;

FIG. 13 is a partial view taken at H in FIG. 3;

FIG. 14 is a front view of the retrievable valve cartridge assembly;

FIG. 15 is a front view of the valve cartridge retrieval tool assembly;

FIG. 16 is a cross-sectional view taken at I-I of FIG. 15;

FIG. 17 is a sectional view taken at L-L in FIG. 16;

fig. 18 is a cross-sectional view at E-E in fig. 3.

The reference symbols in the drawings denote the following:

1-a valve body assembly; 1-1-a valve body; 1-2-lower support plate; 1-3-socket head cap screw; 1-4-positioning guide cylinder;

2-a valve core assembly; 2-1-spool guide ring; 2-2-valve seat sealing ring; 2-3-a cage sleeve; 2-4-a cage sleeve protective sleeve; 2-5-plunger; 2-6-plunger joint; 2-7-plunger joint sealing sleeve; 2-8-T-shaped sealing rings; 2-10-valve cover joint; 2-11-valve stem; 2-13-a first S-ring seal; 2-14-a second S-ring seal; 2-15-spool guide support ring; 2-16-clip support plate; 2-17-marine organism resistant corrugated sheathing; 2-18-locking bolt; 2-19-a first clip pin; 2-20-a first clamp body; 2-21-a second clip body; 2-22-a second clamp pin shaft; 2-23-parallel shaft coupling; 2-24-a drive body; 2-25-copper gasket plane thrust bearing; 2-26-a first interface body; 2-27-a third clip pin; 2-28-a third ferrule body; 2-29-rubber spring; 2-30-copper gasket; 2-31-a hanging cover; 2-32-interface body fixed block; 2-33-metal sealing; 2-34-metal seal support ring; 2-35-valve stem sealing; 2-36-valve stem seal packing gland; 2-37-lip seal; 2-38-O-ring seals; 2-39-O-ring seals; 2-40-two-way sealing ring for shaft; 2-41-lip seal; 2-42-packing gland pressing plate; 2-43-valve cover; 2-44-drive lower cover; 2-45-adapter; 2-46-a pressure compensator; 2-47-a guide body; 2-48-valve stem crossover sub; 2-49-valve stem nut; 2-51-lower support plate; 2-52-drive spindle; 2-53-drive master gear; 2-54-follower master gear; 2-55-upper support plate; 2-56-override lever; 2-57-driver upper cover; 2-58-a second interface body; 2-59-electrowetting joint; 2-60-override lever adapter; 2-61-O-ring seals; 2-64-LVDT linear displacement transducer; 2-68-LVDT core rod crossover sub; 2-69-O-ring; 2-70-O-rings; 2-71-wear ring; 2-72-lip seal; 2-73-O-ring; 2-74-dust ring; 2-75-an over-control rod packing gland; 2-76-planetary transmission; 2-77-driven wheel; 2-78-underwater diver operating hydraulic joint; 2-82-O-ring; 2-83-wear ring; 2-84-lip seal; 2-85-indicating rod packing gland; 2-86-O-ring seals; 2-87-dustproof ring; 2-88-indicating rod; 2-89-oil cylinder supporting plate; 2-90-linkage; 2-91-pawl limit disengaging pin; 2-92-hexagon socket head cap screw; 2-93-piston; 2-94-first cylinder; 2-95-piston seal; 2-96-pawl; 2-97-pawl fixing pin; 2-98-torsion spring; 2-99-drive arm; 2-101-outer spring; 2-102-inner spring; 2-104-spring support plate; 2-105-clamp opening degree pointer; 2-106-throttle opening pointer; 2-107-opening degree dial; 2-109-hot stab hydraulic line; 2-110-hot stab socket; 2-115-guide post; 2-116-anti-back drive device body; 2-117-ball plunger; 2-118-O-ring seals; 2-119-driver body;

3-a recovery tool assembly; 3-4-a lug plate; 3-5-top plate; 3-6-liquid inner guide cylinder; 3-7-an outer guide cylinder; 3-8-guide cylinder flange; 3-9-lift pins; 3-10-a guide cylinder; 3-11-handle shaft; 3-12-handle.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The embodiment of the invention provides an underwater recoverable throttle valve which is suitable for shallow water oil-gas fields and has long-distance efficient driving, is arranged outside a production channel of a Christmas tree, is used for controlling medium flow in an oil-gas well and stabilizing medium pressure, and has the advantages of simple structure, operability of divers and high recovery operation timeliness.

As shown in fig. 1, 3 and 4, the long-distance efficient driving underwater recoverable throttle valve comprises a valve body assembly 1, a valve core assembly 2 and a recovering tool assembly 3. The valve body assembly 1 is connected to a Christmas tree pipeline, the valve core assembly 2 is detachably installed on the valve body assembly 1 and used for adjusting the flow of a medium, and the recovery tool assembly 3 is detachably connected with the valve core assembly 2 and used for installing and fixing the valve core assembly 2 on the valve body assembly 1 or detaching the valve core assembly 2 from the valve body assembly 1.

As shown in fig. 2, the valve body assembly 1 includes a valve body 1-1, a lower support plate 1-2 and a positioning guide cylinder 1-4, the lower support plate 1-2 is fixedly mounted on the valve body 1-1 for supporting the valve core assembly 2, the positioning guide cylinder 1-4 is formed at one side of the valve body 1-1 for matching with a guide post 2-115 at the bottom of the valve core assembly 2, and the bottom of the valve core assembly 2 is inserted into the valve body 1-1 to form a detachable fixed connection.

The valve core assembly 2 comprises a driver assembly, a valve rod 2-11, a plunger 2-5 and a cage 2-3, wherein the driver assembly comprises a driver shell and a driving mechanism arranged in the driver shell. The device comprises a driver assembly, a cage 2-3, a valve rod 2-11, a plunger 2-5, a valve rod 2-11, a plurality of flow adjusting holes and a plunger 2-5, wherein the cage 2-3 is fixedly connected to the bottom of the driver assembly, the output end of the driver assembly is connected with the valve rod 2-11, the valve rod 2-11 is connected with the plunger 2-5, the plunger 2-5 is driven by the valve rod 2-11 to move up and down along the axial direction of the cage 2-3, the outer circle of the cage 2-3 is symmetrically provided with the plurality of flow adjusting holes, and the plunger 2-5 moves up and down to adjust the flow area of the flow adjusting holes on the cage 2-3 so as to adjust the pressure and the flow of the throttle valve.

The guide posts 2-115 are fixedly arranged at the bottom of the driver shell and used for positioning and guiding when the valve core assembly 2 is inserted into the valve body 1-1. The driver housing includes a driver upper cover 2-57, a driver body 2-119, and a driver lower cover 2-44. The driving mechanism comprises upper supporting plates 2-55 and lower supporting plates 2-51 which are arranged at intervals up and down, oil cylinder supporting plates 2-89 which are vertically arranged on the lower supporting plates 2-51, first oil cylinders 2-94 and second oil cylinders which are horizontally and symmetrically arranged on the oil cylinder supporting plates 2-89, driving main shafts 2-52, driving main gears 2-53, a first transmission mechanism and a second transmission mechanism. The driving main gear 2-53 is fixedly installed on the driving main shaft 2-52, the bottom end of the driving main shaft 2-52 is in transmission connection with the valve rod 2-11, the driving main shaft 2-52 rotates to drive the valve rod 2-11 to move up and down, the output end of the first oil cylinder 2-94 is in transmission connection with the driving main gear 2-53 through the first transmission mechanism and is used for driving the driving main shaft 2-52 to rotate clockwise, and the output end of the second oil cylinder is in transmission connection with the driving main gear 2-53 through the second transmission mechanism and is used for driving the driving main shaft 2-52 to rotate anticlockwise.

Referring to fig. 9 and 11, the first transmission mechanism and the second transmission mechanism have the same structure, the first transmission mechanism includes a piston 2-93, a driving arm 2-99, a pawl 2-96, a pawl fixing pin 2-97, a torsion spring 2-98, a spacing disengaging pin 2-91 and a spring mechanism, the piston 2-93 is connected with the cylinder wall of the first cylinder in a sealing and sliding manner, the front end of the piston 2-93 is connected with the driving arm 2-99, the pawl 2-96 is rotatably mounted on the driving arm 2-99 through the pawl fixing pin 2-97, the torsion spring 2-98 is sleeved on the pawl fixing pin 2-97 and used for pushing the pawl 2-96 to be engaged with the driving main gear 2-53, and the piston 2-93 is used for pushing the driving arm 2-99 to move along the horizontal direction, the driving arms are used for driving the main gears 2-53 to rotate clockwise, and the pawl limiting and disengaging pins 2-91 are installed on the oil cylinder supporting plates 2-89 and used for disengaging the pawls 2-96 from the driving main gears 2-53 when the driving arms are reset.

The spring mechanism comprises spring support plates 2-104 and spring assemblies arranged on the spring support plates 2-104, the spring support plates 2-104 and the oil cylinder support plates 2-89 are oppositely arranged, one ends of the spring assemblies are fixedly arranged on the spring support plates 2-104, and the other ends of the spring assemblies are connected with the driving arms 2-99 and used for providing resilience force for contraction of the driving arms 2-99.

The spring assembly comprises an inner spring 2-102 and an outer spring 2-101 which are sleeved inside and outside. The driver adopts the dual spring design, increases the resilience force, makes the spring have sufficient driving force and pushes back the control oil in the hydro-cylinder to several kilometers outer hydraulic pump system, increases spring resilience ability.

Referring to fig. 11, the throttle actuator operates in a step-by-step manner, and is driven by the principle that a first cylinder 2-94 is mounted to a cylinder support plate 2-89 through a hexagon socket head cap screw 2-92, a piston seal 2-95 is mounted to a piston and forms a hydraulic bidirectional seal with an inner chamber of the first cylinder 2-94, and the front end of the piston 2-93 contacts with a driving arm 2-99 and provides a driving force. The pawls 2-96 are mounted to the driving arms 2-99 by pawl fixing pins 2-97, and the torsion springs 2-98 urge the pawls 2-96 to engage with the driving main gear 2-53. Outer springs 2-101 and inner springs 2-102 are arranged between the driving arms 2-99 and the spring supporting plates 2-104, and the two springs 2-101 and 2-102 provide enough resilience force of the driving arms 2-99 to push the pistons 2-93 to push hydraulic oil in the oil cylinders 2-94 back to a long-distance oil return pipeline. When the oil cylinder 2-94 is decompressed, the spring pushes the driving arm 2-99 to reset to the limit position, the pawl limit disengaging pin 2-91 enables the pawl 2-96 to disengage from the driving main gear 2-53, when the oil cylinder is opened and closed, the pawl 2-96 always disengages from the driving main gear 2-53, and the mutual noninterference of opening and closing is realized.

The way closing is taken as an example to explain the driving one-step working principle: the pressure source pressurizes a first oil cylinder 2-94 of a closed circuit to the working pressure of a driver, a piston 93 pushes a driving arm 2-99 to drive a pawl 2-96 to be separated from a pawl limiting and separating pin 2-91, meanwhile, the pawl 2-96 is pushed to be meshed with a driving main gear 2-53 with 24 teeth under the elasticity of a torsion spring 2-98, the piston 2-93 is limited by an oil cylinder supporting plate 2-89 after moving to a stroke, one piston stroke pushes the driving main gear 2-53 to rotate clockwise for 2 teeth, then the pressure of the first oil cylinder 2-94 is relieved to 0, an outer spring 2-101 and an inner spring 2-102 push the driving arm 2-99 and push the piston 93 to move and reset in the pressure relieving process, and 17mL of hydraulic oil in the first oil cylinder 2-94 is pushed back to a hydraulic station on a long-distance platform through an SCM loop of a control system, meanwhile, the pawl limit disengaging pins 2-91 disengage the pawls 2-96 from the driving main gear 2-53, and one-step driving is completed.

The first oil cylinder with short stroke and small diameter, the piston diameter is 24mm, the stroke is 38mm, the oil cylinder discharge capacity is as small as 17mL, and the area of the oil cylinder is designed to be minimum while generating enough driving force. The oil return speed in an oil return pipeline is reduced by several kilometers, the pressure resistance of the oil return pipeline is reduced, the oil return time of an oil cylinder is reduced, the pressure resistance of the oil return pipeline is reduced, the oil return pressure of the oil cylinder is increased, and the oil return time of the oil cylinder is shortened, so that the high driving efficiency of the driver is realized.

Referring to fig. 3 and 11, the throttle valve further includes a third transmission mechanism, the bottom end of the driving main shaft 2-52 is in transmission connection with the valve rod 2-11 through the third transmission mechanism, the third transmission mechanism includes a valve rod nut 2-49, a valve rod adapter 2-48 and a guide body 2-47, the guide body 2-47 is fixedly installed at the bottom end of the lower support plate 2-51, the valve rod adapter 2-48 is sleeved in the guide body 2-47 and slides up and down along the guide body 2-47, the valve rod nut 2-49 is sleeved at the bottom end of the driving main shaft 2-52 and is in screw transmission connection with the driving main shaft 2-52, and the valve rod nut 2-49 is connected with the valve rod adapter 2-48, the bottom end of the valve rod adapter 2-48 is connected with the top end of the valve rod 2-11, and the driving main shaft 2-52 rotates to drive the valve rod nut 2-49, the valve rod adapter 2-48 and the valve rod 2-11 to move up and down.

As shown in fig. 7, the throttle valve further includes a valve rod sealing device, the valve rod sealing device includes a valve cover 2-43, a valve rod seal 2-35, and a valve rod seal packing gland 2-36, the valve cover 2-43 is fixedly installed at the bottom of the driver lower cover 2-44, the top end of the valve rod 2-11 passes through the driver lower cover 2-44 to be connected with the valve rod adapter 2-48, the bottom is connected with the plunger 2-5, the valve rod seal 2-35 and the valve rod seal packing gland 2-36 are both fixedly installed in the valve cover 2-43 and sleeved outside the valve rod 2-11, the bottom of the valve rod seal packing gland 2-36 is used for pressing and setting the valve rod seal 2-43, the top of the valve rod seal packing gland 2-36 is fixedly connected with the packing gland 2-42, and lip seals 2-41 are arranged between the bottoms of the packing gland pressing plates 2-42 and the valve rod sealing packing glands 2-36. The outer side wall of the valve rod sealing packing gland 2-36 is also sleeved with a lip seal 2-37 and an O-shaped sealing ring 2-38. And the inner side wall of the valve rod sealing packing gland 2-36 is also provided with a shaft bidirectional sealing ring 2-40.

The lower end of the valve cover 2-43 is provided with an annular valve cover metal seal 2-33, and the valve cover metal seal 2-33 is sealed with the valve body 1-1.

The throttling valve further comprises a valve cover connector 2-10, a plunger connector 2-6, a plunger connector sealing sleeve 2-7 and a cage sleeve protecting sleeve 2-4, the valve cover connector 2-10 is fixed at the bottom end of the valve cover 2-43, the bottom end of the valve cover connector 2-10 is connected with the cage sleeve 2-3 and the cage sleeve protecting sleeve 2-4, the cage sleeve protecting sleeve 2-4 is sleeved on the outer side of the cage sleeve 2-3, and a flow adjusting hole corresponding to the cage sleeve 2-3 is formed in the cage sleeve protecting sleeve 2-4.

As shown in fig. 4, the valve rod 2-11 passes through the bonnet joint 2-10, the bottom of the valve rod 2-11 is fixedly connected with the plunger joint 2-6, and the bottom end of the plunger joint 2-6 is fixedly connected with the plunger 2-5. And the plunger joint sealing sleeves 2-7 are fixedly sleeved in the valve cover joints 2-10 and used for sealing the plunger joints 2-6. And pressure balance holes are formed in the plunger joints 2-6, and pressure balance sealing is formed between the pressure balance holes and the plunger joint sealing sleeves 2-7.

The materials of the cage sleeve 2-3 and the plunger 2-5 are preferably hard alloy, so that the high-hardness high-abrasion-resistance high-wear-resistance high-sand-content medium cage sleeve is high in hardness, strong in erosion resistance and long in service life, and is suitable for the working condition of a high-sand-content medium.

The outer side wall of the plunger joint sealing sleeve 2-7 is provided with T-shaped sealing rings 2-8, the inner side wall of the plunger joint sealing sleeve 2-7 is fixedly provided with first S-shaped sealing rings 2-13, a second S-shaped sealing ring 2-14 is arranged between the plunger joint 2-6 and the plunger 2-5, and a pressure balance hole, the first S-shaped sealing ring 2-13 and the second S-shaped sealing ring 2-14 form pressure balance sealing.

The plunger 2-5 is sealed with the inner hole of the cage 2-3 through a plunger joint sealing sleeve 2-7, and when the throttle valve is in a zero opening degree or a very small opening degree, the upstream pressure is balanced to generate a downward acting force on the plunger 2-5. The plunger 2-5 is fixedly connected with the valve rod 2-11 through the plunger connector 2-6, the plunger connector 2-6 is internally provided with a balance hole, when the throttle valve is opened, pressure is led into the upper end of the plunger 2-5 through the balance hole, the up-and-down pressure of the plunger 2-5 is balanced, the pressure acts on the smaller area of the valve rod 2-11, the larger area acting below the plunger 2-5 is avoided, the throttle valve is stable in operation, and the operation torque is small.

The design of the cage sleeve protective sleeve 2-4 is adopted, and the protective sleeve is arranged outside the cage sleeve 2-3, so that the hard alloy cage sleeve is prevented from being washed by large rock blocks in a medium, and the service life of the cage sleeve 2-3 is prolonged. Meanwhile, the protective sleeve increases the length of the throttling opening, and the throttling and pressure reducing capacity of the throttling valve is improved.

The throttle valve further comprises a valve core guide ring 2-1 and a valve core guide support ring 2-15, the valve core guide support ring 2-15 is fixed at the bottom end of the cage sleeve protective sleeve 2-4, and the valve core guide ring 2-1 is fixed on the valve core guide support ring 2-15. The valve core bottom is designed in a guiding mode, the valve core guide ring 2-1 is made of PEEK materials, the valve core assembly 2 is prevented from being installed in the valve body underwater, and the valve core assembly scratches the sealing surface of the valve body 1-1.

The valve core is designed with special hole positions, and the throttling holes are completely symmetrical, so that after the medium passes through the cage sleeves 2-3, the energy of the medium is mutually offset and weakened, the downstream erosion of the medium is reduced, the noise is low, and the vibration is small.

As shown in fig. 5 and 6, the throttle valve further comprises a clamp connector assembly, the clamp connector assembly is used for detachably connecting the valve core assembly 2 and the valve body assembly 1, the clamp connector assembly comprises clamp supporting plates 2-16 installed on the valve covers 2-43, and first interface bodies 2-26, driving bodies 2-24, parallel couplers 2-23, locking bolts 2-18, first clamp bodies 2-20, second clamp bodies 2-21, third clamp bodies 2-28, first clamp pin shafts 2-19, second clamp pin shafts 2-22 and third clamp pin shafts 2-27 installed on the clamp supporting plates 2-16, positive threads and negative threads are formed at two ends of the locking bolts 2-18 respectively, and the first clamp pin shafts 2-19 and the second clamp pin shafts 2-22 are sleeved on the positive threads respectively On line and reverse thread, the driving body 2-24 is rotatably installed on the inner wall of the first interface body 2-26 through a thrust bearing 2-25, the output end of the driving body 2-24 is connected with the locking bolt 2-18 through the parallel coupler 2-23, one end of the first clamp body 2-20 is rotatably connected with the first clamp pin 2-19, the other end is rotatably connected with the third clamp body 2-28 and the clamp support plate 2-16 through a third clamp pin 2-27, one end of the second clamp body 2-21 is rotatably connected with the second clamp pin 2-22, and the other end is rotatably connected with the third clamp body 2-28 and the clamp support plate 2-16 through another third clamp pin 2-27, grooves surrounding the peripheral wall of the valve body 1-1 are formed in the first clamp body 2-20, the second clamp body 2-21 and the third clamp body 2-28.

The clamp connector assembly further comprises two marine organism-resistant corrugated sheaths 2-17, the two marine organism-resistant corrugated sheaths 2-17 are respectively sleeved at two ends of the locking bolt 2-18, one marine organism-resistant corrugated sheath 2-17 is connected with the first connector body 2-26, the other end of the marine organism-resistant corrugated sheath is connected with the second clamp pin shaft 2-22, one end of the marine organism-resistant corrugated sheath 2-17 is connected with the far end of the locking bolt 2-18, and the other end of the marine organism-resistant corrugated sheath is connected with the first clamp pin shaft 2-19.

First limiting grooves and second limiting grooves are formed in the clamp supporting plates 2-16 at intervals, and the top ends of the first clamp pin shafts 2-19 and the top ends of the second clamp pin shafts 2-22 extend out of the first limiting grooves and the second limiting grooves respectively.

The top parts of the first clamp pin shaft 2-19 and the second clamp pin shaft 2-22 are fixedly provided with hanging covers 2-31, and the outer side walls of the first clamp pin shaft 2-19 and the second clamp pin shaft 2-22 are also fixedly provided with rubber springs 2-29 and copper gaskets 2-30.

As shown in fig. 18, the throttling valve further includes a pressure compensation mechanism, the pressure compensation mechanism is installed in the driver shell, the pressure compensation mechanism includes a pressure compensator 2-46 and an adapter 2-45, the pressure compensator 2-46 includes a rubber diaphragm and a steel shell sleeved outside the rubber diaphragm, the rubber diaphragm forms a closed cavity, the bottom end of the shell is hermetically communicated with the offshore medium and pressure, namely seawater and the pressure generated by the seawater, through the adapter 2-45, the adapter 2-45 is fixedly installed on the driver lower cover, and an interface at the top of the rubber diaphragm is communicated with hydraulic oil in the driver shell.

Referring to fig. 3, actuator pressure compensation principle: seawater and hydraulic oil in the driver are isolated by the rubber diaphragm in the driver shell, and when the pressure of the seawater is greater than the pressure in the rubber diaphragm in the driver, the seawater can enter the cavity between the steel shell and the rubber diaphragm to extrude the hydraulic oil in the rubber diaphragm into the driver shell to realize pressure balance.

When the hydraulic oil pressure in the driver shell is higher than the seawater pressure, the hydraulic oil of the compensator enters the rubber diaphragm to extrude seawater between the rubber diaphragm and the steel shell, and the seawater is discharged out of the steel shell to realize pressure balance. Therefore, the pressure compensation mechanism plays a role in balancing the water depth pressure at sea and the pressure change caused by the movement of the piston inside the driver, and protects the driver body 2-119, the driver lower cover 2-44 and the driver upper cover 2-57 from the influence of external pressure and failure.

The throttle valve further comprises an override device comprising a second interface body 2-58 formed on the driver upper cover 2-57, an override lever joint 2-60 and an override lever 2-56, the override lever joint 2-60 being fixedly mounted at a central position of the second interface body 2-58, the override lever 2-56 having a top end connected to the override lever joint 2-60 and a bottom end connected to the drive spindle 2-52. The second interface body 2-58 is controlled to rotate through external acting force to drive the driving main shaft 2-52 to rotate, the driving main shaft 2-52 rotates to drive the valve rod 2-11 to rotate, and the valve rod 2-11 rotates to drive the piston 2-6 to move up and down.

The throttling valve further comprises an anti-reverse driving device, the anti-reverse driving device is installed on the upper supporting plate 2-55, the anti-reverse driving device comprises an anti-reverse driving device body 2-116 and a plurality of ball plungers 2-117, the anti-reverse driving device body is sleeved on the outer side of the over-control rod 2-56, a plurality of installation grooves are formed in the anti-reverse driving device body along the circumferential direction in an array mode, one ball plunger 2-117 is installed in each installation groove, a plurality of V-shaped grooves are formed in the outer wall of the driving main shaft 2-52 in an array mode, and the balls of the ball plungers 2-117 extend into the V-shaped grooves and are matched with the V-shaped grooves.

The throttling valve further comprises an LVDT electro-wet joint 2-59, a linear displacement sensor 2-64 and a core rod adapter 2-68, wherein the LVDT electro-wet joint 2-59 is fixedly arranged on the driver upper cover 2-57, the bottom end of the LVDT electro-wet joint 2-59 is electrically connected with the linear displacement sensor 2-64, the linear displacement sensor 2-64 is connected with the valve rod adapter 2-48 through the core rod adapter 2-68, a wet male plug is formed on the outer part of the LVDT electro-wet joint 2-59 and is connected with a corresponding wet female plug on the Christmas tree end for transmitting an LVDT current signal to a control system.

Referring to fig. 3, the working principle of remote monitoring of the opening of the throttle valve is as follows: the movable core rods of the LVDT linear displacement sensors 2-64 are fixedly arranged on the LVDT core rod conversion joints 2-68, the LVDT core rod conversion joints 2-68 are fixedly arranged on the valve rod conversion joints 2-48, and the displacement of the valve rods 2-11 and the plungers 2-5 can be accurately detected. The LVDT linear displacement sensor 2-64 inputs 24V and outputs 4-20mm of standard throttle valve with 0-100% opening and 0.1% error. The opening degree of the throttle valve is accurately detected by detecting the output current of the LVDT linear displacement sensors 2-64.

Referring to fig. 3, 9 and 10, the throttle valve further comprises an underwater opening degree detection device, the underwater opening degree detection device comprises a planetary transmission 2-76, a follower main gear 2-54, a driven gear 2-77, an indication rod 2-88 and an opening degree dial 2-107, the planetary transmission 2-76 is mounted on the driver housing, an output shaft of the planetary transmission 2-76 is connected with the indication rod 2-88, the driven gear 2-77 is fixedly mounted on an input shaft of the planetary transmission 2-76, the driven gear 2-77 is in meshing transmission with the follower main gear 2-54, the follower main gear 2-54 is fixedly mounted on the driving shaft 2-52, the follower main gear is separated from the driving main gear 2-53, the indicating rod 2-88 rotates to drive the pointer to rotate in the opening dial 2-107.

The working principle of the throttle valve for underwater divers or ROV to detect the opening degree is as follows: the driver assembly is internally provided with a follow-up main gear 2-54 and is arranged on a driving main shaft 2-52, the follow-up main gear 2-54 is meshed with a driven gear 2-77, and the driven gear 2-77 is arranged on an input shaft of a planetary transmission 2-76 with a speed ratio of 8: 1. The driver step drives the main gear 2-53 to carry out active transmission and drives the main shaft 2-52 to rotate, the main shaft 2-52 is driven to carry out rotary transmission and drive the follow-up main gear 2-54 to rotate, the follow-up main gear 2-54 drives the driven wheel 2-77 to rotate, the driven wheel 2-77 drives the input shaft of the planetary transmission 2-76 with the speed ratio of 8:1 to rotate, after the planetary transmission 2-76 decelerates 8:1, the output shaft drives the indicating rod 2-88 to drive the pointer 2-106 to rotate on the opening dial 2-107 calibrated with 0-100% opening, and underwater visual detection of the opening of the throttle valve is realized.

The recovery tool assembly comprises a top plate 3-5, an inner liquid guide cylinder 3-6 and an outer guide cylinder 3-7 which are sleeved inside and outside, lug plates 3-4 and two symmetrically installed handle mechanisms, wherein the lug plates 3-4 are installed at the top of the top plate 3-5, the inner liquid guide cylinder 3-6 and the outer guide cylinder 3-7 which are sleeved inside and outside are fixedly installed at the bottom of the top plate 3-5, through holes are correspondingly formed in the inner liquid guide cylinder 3-6 and the outer guide cylinder 3-7, the two handle mechanisms are symmetrically installed at the outer side of the outer guide cylinder 3-7, each handle mechanism comprises a guide cylinder flange 3-8, a lifting pin 3-9, a guide cylinder 3-10, a handle shaft 3-11 and a handle 3-12, the guide cylinder 3-10 is fixedly installed on the outer guide cylinder 3-7 through the guide cylinder flange 3-8, the lifting pin 3-9 and the handle shaft 3-11 are sleeved in the guide cylinder 3-10, one end of the guide cylinder 3-10 is connected with the handle shaft 3-11, the other end of the guide cylinder is opposite to the through holes on the liquid inner guide cylinder 3-6 and the outer guide cylinder 3-7, and the far end of the handle shaft 3-11 extends out from the guide cylinder 3-10 and is connected with the handle 3-12. The recycling tool assembly further comprises two positioning keys, and the two positioning keys are symmetrically arranged on the inner side wall of the outer guide cylinder 3-7 and used for positioning and installing the inner guide cylinder 3-6.

The valve core assembly recovery working principle of the throttle valve is as follows:

s1, a diver operates to remove the LVDT electro-wet joints 2-59 and an underwater diver operates the hydraulic joints 2-78;

s2, a diver installs a torque tool into the first interface body 2-26, the torque tool drives the driving body 2-24 and the parallel shaft coupler 2-23 to drive the locking bolt 2-18 to rotate anticlockwise, when the locking bolt 2-18 rotates anticlockwise, the torque tool drives the first clamp pin shaft 2-19 and the second clamp pin shaft 2-22 to move outwards, the first clamp body 2-20, the second clamp body 2-21 and the third clamp body 2-28 are integrally unfolded and separated from the outer diameter of the upper clamp surface of the throttle valve body 1-1, and meanwhile, the first clamp pin shaft 2-19 and the second clamp pin shaft 2-22 move to the limit positions of the limit grooves of the clamp supporting plates 2-16 to stop;

s3, the diver observes and confirms that the pointers of the clamp switches 2-105 indicate that the valve core assembly is unlocked from the valve body assembly when the O facing position is reached.

S4, the diver operates to butt-mount the recovery tool 3 to the upper end of the second interface body 2-58, and the diver operates the push handle 3-12 to insert the lift pin 3-9 into the corresponding lift hole of the second interface body 2-58.

S5, lifting the lifting lug plate 3-4 by a crane of the offshore platform or the working ship, and recovering the recoverable valve core assembly 2 to the platform together to complete the recovery of the whole valve core assembly 2.

Referring to fig. 1, 3, 5, 9, 12 and 17, the operating principle of the valve core assembly mounted to the valve body assembly is as follows:

s1, the recovery tool assembly 3 is firstly butt-jointed and installed on the upper end of the override second interface body 2-58 on the platform;

s2, operating the push handle 3-12 to insert the lifting pin 3-9 into the corresponding lifting hole of the second interface body 2-58, and slowly lowering the valve core assembly 2 to the position right above the valve body assembly 1 through the lifting lug plate 3-4 on the crane of the offshore platform or the operation ship;

s3, the diver then assists in centering the pilot post 2-115 of the valve core assembly 2 inside the two pilot barrels 1-4 of the valve body assembly 1, and then slowly lowers the valve core assembly 2 until fully seated and stopped on the valve body assembly 1.

S4, the diver installs a torque tool into the first interface body 2-26, drives the driving body 2-24 and the parallel shaft coupler 2-23 to drive the locking bolt 2-18 to rotate clockwise through the torque tool, drives the first clamp pin shaft 2-19 and the second clamp pin shaft 2-22 to move inwards, drives the third clamp body 2-28 to be integrally tightened with the first clamp body 2-20 and the second clamp body 2-21 inwards until the first clamp pin shaft 2-19 and the second clamp pin shaft 2-22 move to the limit positions of the limit grooves of the clamp supporting plates 2-16 respectively, and stops after confirming that the designed selection turns and tightening torque are reached, and then the diver observes and confirms that the clamp switch pointers 2-105 indicate that the clamp switch pointers are in the opposite positions of S, and the valve core is locked from the valve body assembly.

Finally, metal seal external pressure test is carried out to verify the sealing performance of the metal seal of the valve cover, the metal seal of the valve cover and the outer O-shaped sealing ring 2-118 form a sealing area, the sealing area is connected to the hot stab socket 2-110 through the hot stab hydraulic pipeline 2-109, a diver operates to insert the hot stab plug with the test pressure pipeline into the hot stab socket 2-110, and the sealing performance is verified by pressing. Then the diver operates the connecting LVDT electro-wetting joint 2-59 and the underwater diver operates the hydraulic joint 2-78 to complete the installation of the whole valve core assembly 2.

Referring to fig. 4, the flow regulating principle of the throttle valve spool is as follows: a plurality of flow regulating holes are symmetrically distributed on the excircle of the cage sleeve 2-3, the driver assembly drives the valve rod 2-11 to move up and down, and the plunger connector sealing sleeve 2-7 drives the plunger 2-5 to move up and down to regulate the flow area of the flow holes on the cage sleeve 2-3 so as to realize the regulation of the pressure and the flow of the throttle valve.

The cage sleeve 2-3 is arranged inside the cage sleeve protective sleeve 2-4, medium overflowing holes are circumferentially distributed, and the positions of the holes are the same as those of the overflowing holes on the circumference of the cage sleeve 2-3, so that the cage sleeve 2-3 is protected, and the cage sleeve is prevented from being washed by large gravel.

The lower end of the valve core is provided with a valve core guide ring 2-1, and the valve core guide support ring 2-15 is connected with the bottom of the cage sleeve protective sleeve 2-4, so that the valve core 2 can be prevented from scratching the sealing surface of the inner cavity of the valve body assembly 1 in the process of installing the valve core assembly 2 on the valve body assembly 1.

The bottom of the cage sleeve protective sleeve 2-4 is also provided with a valve seat sealing ring 2-2 for sealing a medium at the inlet end of the throttle valve, the valve seat sealing is an S-shaped sealing, the high-pressure resistance is realized, the sealing is reliable, the friction resistance in the installation process is small, the liquid lock effect is avoided in the installation process, and the installation efficiency is high.

The plunger joint 2-6 is internally provided with a pressure balance hole, pressure balance sealing is formed by the plunger joint sealing sleeve 2-7, the T-shaped sealing ring 2-8, the first S-shaped sealing ring 2-13 and the second S-shaped sealing ring 2-14, pressure is led into a valve rod sealing area, large downward force is generated on the plunger by inlet end pressure when the plunger 2-5 moves to a 0-opening position, upward thrust generated by the large sealing area of the lower end of the plunger joint sealing sleeve 2-7 when the pressure is applied to a part of opening positions of the plunger 2-5 is solved, the switching torque of the throttle valve can be reduced, and the effect of stabilizing the switching torque is achieved.

Referring to fig. 3 and 11, the principle of movement of the valve element driven by the throttle actuator is as follows: the driving main gear 2-53 is installed on the driving main shaft 2-52 through a key 2-90, the lower end of the driving main shaft 2-52 is connected with a valve rod nut 2-49 through a key, the valve rod nut 2-49 is connected and matched with a valve rod conversion joint 2-48 through ACME-LH left-hand thread, and the valve rod nut 2-49 rotates and is converted into linear up-and-down movement of the valve rod conversion joint 2-48. The valve rod adapter 2-48 is connected with the upper end of the valve rod 2-11 through threads and fixed through a limit pin.

The driver enables the driving main gear 2-53 to drive the driving main shaft 2-52 to rotate through frequency pulse pressure relief, the driving main shaft 2-52 rotates to drive the valve rod nut 2-49 to rotate anticlockwise or clockwise, and the valve rod nut 2-49 rotates to drive the valve rod adapter 2-48 to drive the valve rod 2-11 and the plunger 2-5 to move linearly up and down. The maximum throttle aperture of the throttle valve is 50.8mm, the adjusting stroke of the plunger 2-5 is 38.1mm, and the number of the driving steps of the throttle valve from full opening to full closing is 72 steps.

Referring to fig. 7, the lower end of the valve cap 2-43 is sealed with the valve body 1-1 through the valve cap metal seal 2-33, the valve rod seal 2-35 is designed inside the valve cap 2-43, the inside of the valve rod seal 2-35 is sealed with the valve rod 2-11 to seal the well medium, the well medium is drilling fluid, and the outside of the valve rod seal 2-35 is sealed with the inner hole of the valve cap 2-43 to seal the well medium. The upper end of the valve cover 2-43 is provided with a valve rod sealing packing gland 2-36, the interior of the valve rod sealing packing gland 2-36 is sealed with the valve rod 2-11 through a lip seal 2-41 and a two-way seal 2-40 to seal hydraulic oil in the driver, and the situation that when the valve rod seal 2-35 leaks, a medium enters the driver to affect the function of the driver is prevented. An O-shaped sealing ring 2-38, a lip-shaped sealing ring 2-37, an O-shaped sealing ring 2-39 and a valve cover stroke seal are designed outside the valve rod sealing packing gland 2-36 to seal hydraulic oil in the driver, and the phenomenon that when the valve rod sealing 2-35 leaks, a medium enters the driver to affect the function of the driver is prevented. Meanwhile, a pressure discharge hole is designed on the excircle of the valve cover 2-43, and when the valve rod seal 2-35 leaks, media directly discharge from sea through the pressure discharge hole, so that the failure of the driver due to overpressure is protected.

Referring to fig. 3 and 8, an override rod 2-56 and an override rod packing gland 2-75 are designed on the top of the driver, a wear-resistant ring 2-71, a lip seal 2-72, an O-shaped ring seal 2-73 and a dust-proof ring 2-74 are designed inside the override rod packing gland 2-75 for sealing, guiding and dust prevention, two O-shaped rings 2-70 are designed outside the override rod packing gland 2-75 for sealing with the driver upper cover 2-57, when hydraulic pressure fails and pressure relief of a first oil cylinder 2-94 and a second oil cylinder is 0, two pawls 2-96 of the two switching ways are disengaged from the driving main gear 2-53 under the action of an external spring 2-101, an internal spring 2-102 and a pawl limit pin. A diver can install a torque tool into the second interface body 2-58, the torque tool drives the override adapter 2-60 to drive the override rod 2-56 to drive the main shaft 2-52 to rotate, the main shaft 2-52 is driven to rotate, then the valve rod nut 2-49 is driven to rotate, and then the valve rod adapter 2-48 drives the plunger 2-5 to move up and down to realize flow regulation under the condition of hydraulic failure.

Referring to fig. 10, an indication rod packing gland 2-85 is designed at the top of the driver, a wear-resisting ring 2-83, a lip seal 2-84, an O-shaped seal ring 2-86 and a dust-proof ring 2-87 are designed inside the indication rod packing gland 2-85 for sealing, guiding and dust-proof, and two O-shaped rings 2-82 are designed outside the indication rod packing gland 2-85 for sealing with the driver upper cover 2-57.

Referring to fig. 3, the top of the driver is provided with an LVDT electro-wetting joint 2-59, the LVDT electro-wetting joint 2-59 and a driver upper cover 2-57 are provided with two O-shaped sealing rings 2-61 for sealing external seawater and internal hydraulic oil, the bottom of the LVDT electro-wetting joint 2-59 is connected with an LVDT displacement sensor 2-64 through a cable, a 4-core male-female wet plug is arranged outside the LVDT electro-wetting joint 2-59 and connected with a corresponding female wet plug at a Christmas tree end, and an LVDT current signal is transmitted to a control system.

Referring to fig. 13, the top of the driver is designed with an anti-back-drive device which mainly comprises an anti-back-drive device body 2-116 and a ball plunger 2-117. Six ball plungers 2-117 are arranged in the anti-back-drive device bodies 2-116 and matched with V-shaped grooves at the upper ends of the driving main shafts 2-52, the anti-back-drive device bodies 2-116 are fixedly connected with the upper supporting plates 2-55 through six hexagon socket head cap bolts, so that a large resistance is provided for the driving main shafts, and the driving main gears 2-53 are prevented from driving the driving main shafts 2-52 to rotate reversely to influence the driving performance of the driver in the resetting process of the pawls 2-96.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A long-distance high-efficiency driving underwater recyclable throttle valve is characterized by comprising a valve body assembly, a valve core assembly and a recycling tool assembly;

2. The long reach high efficiency drive underwater retractable throttle valve of claim 1, wherein the valve body assembly comprises a valve body and a positioning guide cylinder, the positioning guide cylinder is arranged on one side of the valve body and is used for matching with a guide post at the bottom of the valve core assembly, and the cage and the plunger are inserted into the valve body to realize throttle valve pressure and flow regulation.

3. The long-distance high-efficiency-driving underwater recoverable throttling valve according to claim 1, wherein the spring mechanism comprises a spring supporting plate and a spring assembly arranged on the spring supporting plate, the spring supporting plate and the cylinder supporting plate are oppositely arranged, the spring assembly comprises an inner spring and an outer spring which are sleeved with each other, one end of the inner spring and one end of the outer spring are fixedly arranged on the spring supporting plate, and the other end of the inner spring and the other end of the outer spring are abutted to the driving arm so as to provide resilience force for the contraction of the driving arm.

4. The long reach highly efficient drive underwater retractable choke valve of claim 1, further comprising a third transmission mechanism, the bottom end of the driving main shaft is in transmission connection with the valve rod through the third transmission mechanism, the third transmission mechanism comprises a valve rod nut, a valve rod adapter and a guide body, the guide body is fixedly arranged at the bottom end of the lower supporting plate, the valve rod adapter is sleeved in the guide body and slides up and down along the guide body, the valve rod nut is in key connection with the bottom of the driving main shaft, the valve rod adapter is sleeved in the valve rod nut and is in threaded transmission connection with the valve rod nut, the bottom end of the valve rod adapter is connected with the top end of the valve rod, and the driving main shaft rotates to drive the valve rod nut, the valve rod adapter and the valve rod to move up and down.

5. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 4, further comprising a valve rod sealing device, wherein the valve rod sealing device comprises a valve cover, a valve rod seal and a valve rod seal packing gland, the valve cover is fixedly installed at the bottom of the driver shell, the valve rod sleeve is arranged in the valve cover, the top of the valve rod is connected with the valve rod conversion joint, the bottom of the valve rod is connected with the plunger, the valve rod seal and the valve rod seal packing gland are both fixedly installed in the valve cover and sleeved outside the valve rod, and the bottom of the valve rod seal packing gland presses the valve rod seal.

6. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 5, wherein the lower end of the valve cover is further provided with an annular valve cover metal seal, the valve cover is sealed with the valve body through the valve cover metal seal, and the valve cover metal seal is supported by a seal support ring arranged at the bottom end of the valve cover.

7. The long-distance high-efficiency driving underwater recoverable throttling valve according to claim 6, further comprising a hot stab hydraulic pipeline, a hot stab plug and a hot stab socket, wherein one end of the hot stab hydraulic pipeline is communicated with a sealing area formed between the metal seal of the valve cover and the valve body, the other end of the hot stab hydraulic pipeline is connected with the hot stab plug, and the hot stab plug is inserted into the hot stab socket to verify the sealing performance.

8. The long-distance high-efficiency driving underwater recoverable throttling valve according to claim 7, further comprising a valve cover joint, a plunger joint sealing sleeve and a cage sleeve protecting sleeve, wherein the valve cover joint is fixed at the bottom end of the valve cover, the bottom end of the valve cover joint is connected with the cage sleeve and the cage sleeve protecting sleeve, the cage sleeve protecting sleeve is sleeved on the outer side of the cage sleeve, and a flow adjusting hole corresponding to the cage sleeve is formed in the cage sleeve protecting sleeve;

9. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 8, wherein the spool assembly further comprises a spool guide support ring and a spool guide support ring, the spool guide support ring is fixed at the bottom end of the cage sleeve protective sleeve, and the spool guide support ring is fixed on the spool guide support ring.

10. The long-distance high-efficiency driving underwater recoverable throttling valve according to claim 9, wherein a pressure balancing hole is formed in the plunger joint, and a pressure balancing seal is formed between the pressure balancing hole and the sealing sleeve of the plunger joint.

11. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 10, wherein the spool assembly further comprises a clamp connector assembly for detachably connecting the spool assembly with the valve body assembly, the clamp connector assembly comprises a clamp supporting plate mounted on the valve cover, and a first interface body, a driving body, a parallel coupler, a locking bolt, a first clamp body, a second clamp body, a third clamp body, a first clamp pin, a second clamp pin and two third clamp pins mounted on the clamp supporting plate, wherein a positive thread and a negative thread are respectively formed at two ends of the locking bolt, the first clamp pin and the second clamp pin are respectively sleeved on the positive thread and the negative thread, the driving body is rotatably mounted on the inner wall of the first interface body through a thrust bearing, the output of drive body with between the locking bolt through parallel shaft coupling connects, the one end of first clamp body with first clamp round pin axle rotates even, the other end with rotate through a third clamp round pin axle between third clamp body and the clamp backup pad and connect, the one end of second clamp body with second clamp round pin axle rotates and connects, the other end with rotate through another third clamp round pin axle between third clamp body and the clamp backup pad and connect, first clamp body, second clamp body and third clamp body embrace the periphery wall of valve body.

12. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 11, wherein the clamp connector assembly further comprises two marine organism-proof corrugated sheaths, the two marine organism-proof corrugated sheaths are respectively sleeved at two ends of the locking bolt, one marine organism-proof corrugated sheath has one end connected with the first interface body and the other end connected with the first clamp pin shaft, and the other marine organism-proof corrugated sheath has one end connected with the distal end of the locking bolt and the other end connected with the second clamp pin shaft.

13. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 12, wherein a first limiting groove and a second limiting groove are formed in the clamp supporting plate at intervals, and the top ends of the first clamp pin shaft and the second clamp pin shaft respectively extend out of the first limiting groove and the second limiting groove.

14. The long-distance high-efficiency driving underwater recoverable throttling valve according to claim 13, wherein the driver shell comprises a driver upper cover, a driver lower cover and a driver body, the valve core assembly further comprises a pressure compensation mechanism, the pressure compensation mechanism is installed in the driver shell and comprises a pressure compensator and a conversion joint, the pressure compensator comprises a rubber diaphragm and a steel shell sleeved outside the rubber diaphragm, a closed cavity formed by the rubber diaphragm, the bottom end of the steel shell is hermetically communicated with an offshore medium and pressure through the conversion joint, the conversion joint is fixedly installed on the driver lower cover, and an interface at the top of the rubber diaphragm is communicated with hydraulic oil in the driver shell.

15. The long-distance high-efficiency driving underwater retractable throttle valve of claim 14, wherein the valve core assembly further comprises an override device, the override device comprises a second interface body formed on the upper cover of the driver, an override rod joint and an override rod, the override rod joint is fixedly installed at the center position of the second interface, the top end of the override rod is connected with the override rod joint, the bottom end of the override rod is connected with the driving spindle, and the second interface is driven to rotate by external force, so that the override rod and the driving spindle are driven to rotate.

16. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 15, wherein the spool assembly further comprises an anti-back driving device, the anti-back driving device is mounted on the upper cover of the driver, the anti-back driving device comprises an anti-back driving device body and a plurality of ball plungers, the anti-back driving device body is sleeved outside the override lever, a plurality of mounting grooves are formed in the anti-back driving device body along a circumferential direction array, one ball plunger is mounted in each mounting groove, a plurality of V-shaped grooves are formed in the outer wall of the driving spindle, and the balls of the ball plungers extend into the V-shaped grooves and are matched with the V-shaped grooves.

17. The long distance high efficiency driving underwater retractable throttling valve of claim 16, wherein the spool assembly further comprises an LVDT electro-wetting joint, a linear displacement sensor and a mandrel adapter, the LVDT electro-wetting joint is fixedly installed on the upper cover of the driver, the bottom end of the LVDT electro-wetting joint is electrically connected with the linear displacement sensor, the linear displacement sensor is connected with the valve stem adapter through the mandrel adapter, a wet male plug is formed outside the LVDT electro-wetting joint, and the wet male plug is connected with a corresponding wet female plug at the christmas tree end for transmitting an LVDT current signal to the control system.

18. The long distance high efficiency driving underwater retrievable throttle valve according to claim 17, further comprising an underwater opening degree detecting means, wherein the underwater opening degree detecting means includes a planetary transmission, a follower master gear, a driven gear, an indicating rod and an opening degree dial, the planetary transmission is mounted on the driver housing, an output shaft of the planetary transmission is connected to the indicating rod, the driven gear is fixedly mounted on an input shaft of the planetary transmission, the driven gear is in mesh transmission with the follower master gear, the follower master gear is fixedly mounted on the driving shaft, the follower master gear is spaced from the driving master gear, and the indicating rod rotates to drive a pointer to rotate the dial within the opening degree.

19. The long-distance high-efficiency driving underwater recoverable throttle valve according to claim 18, wherein the recovery tool assembly comprises a top plate, an inner liquid guide cylinder and an outer liquid guide cylinder which are sleeved inside and outside, a lifting lug and two symmetrically-installed handle mechanisms, the lifting lug is installed at the top of the top plate, the inner liquid guide cylinder and the outer liquid guide cylinder which are sleeved inside and outside are fixedly installed at the bottom of the top plate, through holes are correspondingly formed in the inner liquid guide cylinder and the outer liquid guide cylinder, the two handle mechanisms are symmetrically installed at the outer side of the outer liquid guide cylinder, each handle mechanism comprises a guide cylinder flange, a lifting pin, a guide cylinder, a handle shaft and a handle, the guide cylinder is fixedly installed on the outer liquid guide cylinder through the guide cylinder flange, the lifting pin and the handle shaft are sleeved in the guide cylinder, one end of the guide cylinder is connected with the handle shaft, and the other end of the guide cylinder is opposite to the through holes on the inner liquid guide cylinder and the outer liquid guide cylinder, the distal end of the handle extends out from the guide cylinder and is connected with the handle.

20. The long reach high efficiency drive underwater retractable throttle valve of claim 19, wherein said retraction tool assembly further comprises two positioning keys symmetrically mounted on the inside wall of said outer guide cylinder for positioning said inner hydraulic guide cylinder.