Interventional flow-state-controllable high-pressure ball valve

Abstract

The invention belongs to the related field of valve bodies, and discloses an intrusive flow-state-controllable high-pressure ball valve which comprises a valve body, a valve element and valve rod assembly, a shaft sleeve assembly, a sealing assembly, a sealing valve seat assembly, a ball valve spring assembly and a valve body pressing sleeve. The sealing valve seat assembly and the valve body pressing sleeve seal the valve element in an overlapped mode, and the integration degree of the ball valve is improved. A threaded hole is formed between the shaft sleeve assembly and the valve body pressing sleeve assembly, so that the positioning difficulty and the ball valve mounting difficulty are reduced; the valve element assembly is matched with the valve seat sealing assembly and the sealing gasket assembly in a PEEK-titanium alloy matching mode, so that the friction force in the movement process of the valve element assembly is reduced, and the possibility of clamping stagnation of the valve element assembly is reduced; o-shaped rings are arranged among the valve seat sealing assembly, the inner wall of the valve body and the valve body pressing sleeve, good sealing performance is kept for a long time, and the service life of the deep sea high-pressure ball valve is prolonged; a certain gap is reserved between the end, with the containing area sealed, of the valve seat and the ball valve spring assembly, and it is ensured that effective sealing can be established between the valve element assembly and the valve seat.

Description

Technical Field

[0001] The present invention relates to the field of valve body structure and sealing control technology, and particularly to a high-pressure ball valve with a structure suitable for deep-sea high-pressure environments, highly reliable sealing performance and controllable flow regulation function. Background Art

[0002] With the development of marine resource development and deep-sea engineering technology, valves play a key role in deep-sea operations. The deep-sea operating environment is extremely complex, and harsh factors such as ultra-high pressure, low temperature, and turbulence place stringent demands on valve performance. Since the water pressure increases by approximately 1 bar for every 10m increase in water depth, the sea pressure at a depth of 5,000m can reach approximately 500 bar. The high water pressure environment requires the valve structure to have extremely high load-bearing capacity and sealing reliability. In addition, deep-sea operations require valves to have good noise reduction performance to avoid mechanical and flow noise from interfering with the surrounding environment or equipment. In summary, deep-sea valves must not only withstand extreme water pressure and corrosion, but also maintain long-term reliability and silent operation under complex flow conditions.

[0003] In existing high-pressure ball valve designs, the valve stem is typically located outside the valve body, with the ball rotating solely to achieve opening and closing control. This traditional design only regulates the flow rate of the medium, but lacks precise control over the internal flow pattern. When open, the flow path of a ball valve often forms sharp turns and narrow passageways, causing fluid to flow rapidly and suddenly around the valve seat. This creates severe turbulence and localized high-velocity areas, exacerbating erosion and wear on the valve seat and pipe wall, and even causing cavitation. Furthermore, high-velocity fluids in industrial ball valves can cause wear and corrosion on the ball surface and seat sealing surface due to erosion. Severe turbulence and cavitation also generate significant noise, increasing valve operating noise. While some existing poppet-type ball valve designs (such as lift-stem ball valves) can mitigate uneven seat wear caused by localized high-speed flow to a certain extent, traditional ball valves still struggle to directly alter the flow field structure within the valve. Consequently, traditional high-pressure ball valves suffer from flow path damage, high noise levels, and limited service life under the harsh operating conditions of deepwater.

[0004] With the continuous advancement of underwater research, the existing technology has yet to provide a ball valve structure that not only meets the high-pressure and corrosion-resistant requirements of deep-sea applications, but also improves the internal flow field, reduces noise, and reduces wear. To address these shortcomings of the existing technology, it is necessary to propose a new structural solution to optimize the flow field within the valve and enhance deep-sea performance. This invention proposes a shuttle-shaped, integrated valve stem design with a streamlined cross-section and positioned within the flow channel within the valve body. Unlike traditional external valve stems, this shuttle-shaped stem acts as a fluid guide, forming a direct integral structure with the ball body. Its shape facilitates smooth fluid flow through the valve. By optimizing the valve stem shape and flow channel structure, local turbulence and velocity fluctuations during fluid flow can be reduced, minimizing the scouring effect of the medium on the valve wall and valve seat. Existing data show that a properly designed internal valve structure can eliminate the adverse effects of localized high-speed flow. The shuttle-shaped valve stem in this invention acts as a smooth guide, and its optimized flow field layout is expected to reduce flow velocity disturbances and vortex formation, thereby effectively reducing wall erosion and valve noise. This structure also disperses the forces acting on the valve body, enhancing overall strength and wear resistance, significantly extending the valve's service life and improving operational quietness. The proposed technical solution for an intrusive, flow-controlled, high-pressure ball valve with a shuttle-shaped, integrated stem provides the theoretical and technical foundation for meeting the high-performance valve requirements of deep-sea operations. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides an intervention-type flow-controllable high-pressure ball valve.

[0006] The present invention is implemented as follows: an intervention-type flow-controlled high-pressure ball valve, characterized in that the intervention-type flow-controlled high-pressure ball valve includes a valve body, a valve core and valve stem assembly, a shaft sleeve assembly, a sealing assembly, a sealing valve seat assembly, a ball valve spring assembly and a valve body compression sleeve.

[0007] Furthermore, the valve body includes a valve body body, a valve seat pressing sleeve and a threaded sleeve, the threaded sleeve and the valve seat pressing sleeve are connected by a hexagon socket head screw, and a rectangular sealing ring is used between the valve body pressing sleeve and the valve body flange to effectively isolate the two ends of the valve body pressing sleeve; the flange at the valve body installation position is installed relative to the target tooling using a double-headed stud; the valve body pressing sleeve and the valve stem are concentrically matched and a thrust washer is used to effectively isolate the valve body pressing sleeve and the valve stem; the valve body pressing sleeve and the valve stem are sealed by a dumbbell sealing ring and an O-ring, the inner ring of the annular surface of the dumbbell sealing ring contacts the valve stem, and the O-rings are stacked from top to bottom and include a first O-ring, a second O-ring, and a third O-ring, and the inner rings of the annular surfaces of the first O-ring and the third O-ring contact the valve stem, and the outer ring of the annular surface of the second O-ring contacts the inner wall of the valve body.

[0008] Further, the shaft sleeve assembly includes a support plate, a shaft sleeve body, and an adjusting pad, which is concentrically matched with the extension of the valve body boss and is secondarily fixed by the valve body flow channel step; the valve body flow channel step includes a step body and a groove, which is communicated with the support plate and is connected by an internal hexagonal taper end set screw.

[0009] Further, the valve core and valve stem assembly includes a valve core body and a valve stem body, which are arranged in the valve body, and the valve stem boss and the valve core body boss are matched with a gap; the valve core body is provided with the sealing valve seat assembly at both ends, the sealing valve seat includes front and rear valve seat bodies and a valve seat sealing pad, the front valve seat body includes a valve seat sealing pad, an O-ring, and the ball valve spring assembly, the ball valve spring assembly is accommodated in the front valve seat and is resisted by the internal flow channel end of the valve body, and has a pre-compression amount; the outer surface and the internal flow channel surface of the front valve seat are provided with rectangular grooves, the O-ring is used in the rectangular groove of the outer surface of the front valve seat to reduce the friction and wear between the valve body and the outer surface of the front valve seat; the rectangular groove of the inner surface of the front valve seat is convenient for fixing and installing by a special clamp; the outlet sealing valve seat body is provided with a stepped surface, the stepped surface includes the rear sealing sleeve, an O-ring, and the ball valve spring assembly, the outlet sealing sleeve includes a valve seat sleeve, the valve body sleeve ring surface is processed with threads and the end surface is provided with a threaded hole, the valve body outlet is connected with the valve seat sleeve through the ring surface threads, and the valve seat sleeve is connected with the valve body through the internal hexagonal taper end set screw; the end surface of the valve body sleeve is provided with four ports for positioning; the ball valve spring assembly is accommodated in the rear sealing sleeve and is resisted by the stepped end surface of the rear valve seat, and has a pre-compression amount.

[0010] Further, the valve body assembly flow channel is always communicated with the external marine environment.

[0011] Further, the valve core and the sealing valve seat assembly are relatively fixed in the valve body, and the sealing valve seat assembly and the inner wall of the valve body have a certain gap to prevent deformation and jamming between components due to temperature changes.

[0012] Further, the valve core and valve stem assembly is matched with a gap, and the valve stem and the valve core profile contact are provided with a round corner to prevent stress concentration of the valve stem; and the valve core and valve stem assembly is provided with a protection hole, and the upper pressing plate and the valve stem assembly are provided with a gap to prevent seawater from flowing into the valve core cavity and causing collision and friction when the valve stem is ejected. The valve stem assembly is arranged in the ball valve flow channel, which can effectively change the fluid flow state at the moment of opening and closing of the ball valve. In addition, the valve core surface is plated with a wear-resistant coating, which enhances corrosion resistance and reduces rotational friction resistance.

[0013] Further, the upper pressing plate and the inner wall of the valve body are provided with a slope to facilitate matching and installation.

[0014] Furthermore, the contact surface between the valve core and the valve seat adopts a spherical sealing structure, which improves pressure resistance and reduces leakage.

[0015] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0016] First, compared to existing deep-sea high-pressure ball valves, the sealing seat assembly and valve body compression sleeve proposed in this invention provide a superimposed seal on the valve core, while also serving as the ball valve flow path and maintaining concentric consistency. This further improves the ball valve's integration, greatly simplifies its structure, and reduces its size. Second, a threaded hole is provided between the shaft sleeve assembly and the valve body compression sleeve assembly, simplifying positioning and ball valve installation.

[0017] The valve core assembly, the valve seat sealing assembly and the sealing gasket assembly of the present invention all adopt a PEEK-titanium alloy matching method, which effectively reduces the friction during the movement of the valve core assembly and reduces the possibility of the valve core assembly getting stuck.

[0018] The valve seat sealing assembly of the present invention is provided with O-rings between the inner wall of the valve body and the valve body compression sleeve, which maintains good sealing performance for a long time, effectively reduces the wear and friction resistance between the components, and increases the service life of the deep-sea high-pressure ball valve.

[0019] A certain gap is reserved between one end of the valve seat sealing accommodation area of ​​the present invention and the ball valve spring assembly, ensuring that the liquid pressure, spring force and liquid pressure of the valve body inlet chamber generated by the area difference at both ends of the valve seat seal act on the valve seat through the valve core assembly, ensuring that an effective seal can be established between the valve core assembly and the valve seat.

[0020] Second, as auxiliary evidence for the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0021] (1) The expected benefits and commercial value of the technical solution of the present invention after transformation are as follows: Through the integrated structure and high sealing performance design, the present invention significantly improves the adaptability of deep-sea high-pressure ball valves in complex environments such as manned submersibles and deep-sea unmanned platforms. By adopting key technologies such as the combination of PEEK and titanium alloy materials, spherical sealing structure, and bidirectional preloaded spring seal, while ensuring highly reliable opening and closing, it achieves structural miniaturization and maintenance convenience, reduces the integration and maintenance costs of deep-sea equipment, and has significant engineering transformation value. In the future, it can be widely used in high-end marine equipment fields such as deep-sea mining, military reconnaissance, and underwater operation robots, and has broad market prospects.

[0022] (2) The technical solution of the present invention fills the technical gap in the industry at home and abroad: At present, most deep-sea high-pressure ball valves at home and abroad are mainly large flange fixed structures, which generally have problems such as difficulty in opening and closing, sealing failure, and low assembly precision. The present invention proposes a "flow controllable" structure for the first time, combining key technologies such as a multi-stage composite sealing system, an axial guide sleeve assembly, and a pressure relief safety hole, breaking through the limitations of traditional ball valve design and realizing adaptive adjustment of the sealing force between the ball and the valve seat, filling the technical gap of high-end valves with "high sealing + quick assembly + controllability" in high-pressure, highly corrosive, and frequently opened and closed environments.

[0023] (3) The technical solution of the present invention solves a technical problem that people have long been eager to solve but have never been able to solve: how to ensure that the ball valve does not get stuck, leak or become unstable during the opening and closing process in the extreme high-pressure environment of the deep sea has long been a core technical difficulty that the industry has not been able to break through. The present invention uses a comprehensive design of "ball clearance fit + coating friction reduction + multi-point positioning + sleeve limit" combined with spring preload and triple sealing. While ensuring sealing performance, it effectively suppresses problems such as eccentric load, friction concentration and structural interference during the rotation of the ball, achieving high-frequency, long-life, zero-fault opening and closing actions, and overcoming the deep-sea controllable sealing technology problem that has plagued the industry for many years.

[0024] (4) The technical solution of the present invention overcomes technical prejudice: the traditional concept is that high-pressure sealing reliability must rely on large size, rigid connection and high preload, which makes it difficult to achieve both compact structure and flexible assembly and disassembly. The present invention breaks through this idea and adopts a modular detachable structure and finely matched components. Without sacrificing sealing strength, it achieves rapid assembly, automatic pressure relief protection and flexible guide alignment, breaking the technical prejudice that "compact structure and high reliability cannot be achieved at the same time" and forming a new deep-sea valve structural design paradigm. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a cross-sectional view of an intrusive flow-controlled high-pressure ball valve provided by an embodiment of the present invention;

[0026] Figure 2 This is a side view of the outlet end of an intrusive flow-controlled high-pressure ball valve provided by an embodiment of the present invention;

[0027] In the figure: 1-valve body pressing sleeve, 2-valve body, 3-O-ring, 4-hexagon socket set screw, 5-inner thread cylindrical pin, 6-threaded sleeve, 7-valve seat pressing sleeve, 8-outlet sealing valve seat O-ring, 9-spring, 10-valve seat pressing sleeve O-ring, 11-valve stem, 12-bolt, stud, 13-dumbbell sealing ring, 14-rectangular sealing ring, 15-thrust pad, 16-support plate, 17-sleeve, 18-adjusting pad, 19-inlet and outlet sealing valve seat sealing gaskets, 20-inlet and outlet sealing valve seats, 21-valve core ball, 22-inlet sealing valve seat O-ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] like Figure 1 As shown, an embodiment of the present invention provides an intervention-type flow-controlled high-pressure ball valve, which includes a valve body 2, a valve core and valve stem assembly, a shaft sleeve assembly, a sealing assembly, a sealing valve seat assembly, a ball valve spring assembly 9 and a valve body compression sleeve 1.

[0030] The valve core and valve stem assembly includes a valve core ball 21 and a valve stem 11. The valve core ball 21 and the valve stem 11 are connected by a clearance fit to ensure that the friction and wear caused by the valve stem 11 driving the valve core ball 21 to rotate relative to each other is minimized. A safety hole is machined on the top of the valve core ball 21 to prevent the collision and friction caused by the inflow of high-pressure seawater from the deep sea into the cavity of the valve core ball 21 and the ejection of the valve stem 11. Positioning holes are provided at the bottom of the valve core ball 2 and the valve stem 11. The positioning hole at the bottom of the valve stem 11 ensures the relative positioning between the valve core ball 21 and the valve core ball 21. The positioning hole at the bottom of the valve core ball 21 ensures the relative positioning of the valve core and valve stem assembly housed in the valve body 2 and the housing of the valve body 2.

[0031] The shaft sleeve assembly is fixed relative to the top and bottom ends of the valve core valve stem assembly, and the shaft sleeve assembly comprises a support plate 16, a shaft sleeve 17 and an adjusting pad 18. The inner ring of the shaft sleeve 17 is sleeved with the outer ring of the step of the valve core ball 21, which ensures the friction wear of the rotation of the valve core ball 21. The inner ring of the support plate 16 is in contact with the inner ring of the shaft sleeve, and the two are coaxially positioned. The outer ring of the support ring 16 is abutted and fixed at the internal step of the valve body 2. The adjusting pad 18 is fixed to the step surface of the valve core ball 21 and the bottom end of the shaft sleeve 17. It ensures the friction force during the relative sliding of the shaft sleeve assembly, and reduces the possibility of jamming of the valve core assembly. The shaft sleeve assembly is installed at the bottom end of the valve core ball 21 in the same way. The left end of the support plate 16 and the internal step of the valve body 2 are provided with an internal hexagonal screw hole 4. The tail end of the internal hexagonal screw 4 is abutted with the valve seat pressing sleeve 7, and the internal hexagonal screw 4 is fixed in the support plate 16, which ensures the fixed position of the support plate 16 and facilitates the axial positioning between the shaft sleeve assembly and the valve core valve body assembly. The valve seat pressing sleeve is in contact with the inner wall of the valve body 2, and an annular groove is arranged at the contact position. The O-ring of the valve seat pressing sleeve is placed in the groove. Because the valve seat pressing sleeve 20 accommodates a spring group 9 with a certain compression, the inner ring step of the valve seat pressing sleeve forms an annular sealing groove with the outlet sealing valve seat 20, and the O-ring of the outlet sealing valve seat 8 is placed in the groove, which further improves the overall sealing performance.

[0032] The sealing assembly and the sealing valve seat assembly comprise a valve seat pressing sleeve 7, an inlet and outlet sealing valve seat gasket 19 and an inlet and outlet sealing valve seat 20. The sealing assembly and the sealing valve seat assembly are accommodated in the valve body 2, and the sealing valve seat assembly is symmetrical relative to the valve core ball 21. The stepped structure of the valve seat pressing sleeve 7 is abutted with the threaded sleeve 6. The valve seat pressing sleeve 7 accommodates a spring group 9, which is compressed at the stepped structure end face of the outlet sealing valve seat 20. The outlet sealing valve seat 20 accommodates the outlet sealing valve seat gasket 19, which is in contact with the valve core ball 21. The valve body 2 is provided with a step at the inlet, which is abutted with the spring group 9 accommodated in the inlet sealing valve seat 20, and has a certain compression amount. The inlet sealing valve seat gasket 19 is accommodated in the other end of the inlet sealing valve seat 20 and is in contact with the surface of the valve core ball 21, forming a reliable sealing state. The valve core ball 21, the sealing valve seat assembly and the inner ring of the valve seat pressing sleeve form an internal flow channel of the quick-mount high-pressure deep-sea controllable ball valve.

[0033] The front and rear valve seat sealing assemblies are abutted with the valve core valve stem assembly body to limit the instability deflection and increase the stability of the valve core body, which can reduce the wear of the valve seat caused by repeated opening and closing of the valve core under deep-sea high pressure. The bearing wraps a part of the lower end of the valve stem, which can stabilize the valve stem and valve ball body and avoid instability deflection of the valve stem and valve ball body under the impact of external pressure.

[0034] The valve body pressure sleeve 1 inner ring and the valve stem 11 outer ring contact end is provided with 3 annular groove sealing groove, dumbbell sealing ring 14 and O-ring 3 are placed in the annular groove and sealing groove respectively, in addition, the valve body pressure sleeve 1 outer ring and the valve body 2 inner wall surface contact is provided with sealing groove, O-ring 3 is placed in the sealing groove. The valve body 2 and the valve body pressure sleeve are in contact to form a rectangular groove, and the rectangular sealing ring 14 is placed in the groove. The O-ring 3, dumbbell sealing ring 13 and rectangular sealing ring 14 are used to implement multiple sealing on the connection and relative sliding of the valve body pressure sleeve 1, valve body 2 and valve stem 11. The inner and outer multiple sealing improves the sealing effect of the connection between the valve body 2 and the valve seat pressure sleeve 1, thereby improving the overall sealing performance of the ball valve.

[0035] The overall assembly process of the flow state controllable high pressure ball valve: first, the inlet and outlet sealing valve seat sealing pads 19 are respectively pressed into the inlet and outlet sealing valve seats 20. The inlet sealing valve seat O-ring 22 and the outlet sealing valve seat O-ring 8 are respectively installed in the sealing groove of the inlet sealing valve seat 20 and the annular end surface of the outlet sealing valve seat stepped 20, then the springs 9 are respectively placed in the accommodation holes of the inlet and outlet sealing valve seats 20, the valve body 2 is placed horizontally along the axis of the inner flow channel, the inlet sealing valve seat 20 is clamped into the prepositioned position in the valve body 2 by manual method, the process groove provided in the inlet sealing valve seat 20 is clamped by the tool clamping jaw, and the valve core ball 21 is pulled to the preset position, until the inlet sealing valve seat 20 directly contacts with the inner wall of the valve body 2, and the tool clamping jaw is also fixed. Figure 1 The valve core ball 21, shaft sleeve 17, adjusting pad 18 and support plate 16 are installed in the position shown in the figure, and are manually placed in the prepositioned position in the valve body 2, the inner hexagonal screw 4 is screwed into place, which can fix the support plate 16, and the inner hexagonal screw 4 directly contacts with the hole bottom of the support plate 16, the screwing depth can be controlled by the inner hexagonal screw 4 being flush with the small threaded hole plane of the valve body 2. Figure 1 The valve stem 11, valve body pressure sleeve 1, sealing ring 8, thrust pad 15 and flat key are installed in the position shown in the figure, and are placed in the profile connection of the valve core ball 21, and the valve body pressure sleeve 1 and the valve body 2 are tightened by screws. After the above tooling is completed, the fixed clamping jaw is slowly released, and the inlet valve seat sealing 20 slowly contacts with the valve core ball 21. The valve seat sleeve 7, spring 9, sealing ring 8 and outlet sealing valve seat 20 are preliminarily assembled, and the valve seat sleeve 7 is slowly placed. The threaded sleeve 6 is screwed into the valve body 2 and tightened. Finally, the internal threaded cylindrical pin 5 is screwed into the internal threaded cylindrical pin groove at the top end of the valve stem 11.

[0036] The opening process of an intrusive, flow-controlled, high-pressure ball valve relies on the precise rotation of the valve stem. Once the stem and valve stem are connected by a clearance fit, operating torque is transmitted axially from the stem to the ball, causing the ball's center to change in angle relative to the housing. This angle change directly translates to the opening of the flow passage. When the flow path within the ball is concentric with the housing's inner cavity, the valve is fully open. When the ball rotates perpendicular to the flow path, it blocks the flow, enabling rapid flow switching in high-pressure environments.

[0037] In high-pressure seawater environments, the design of the sealing system is particularly critical. A compression spring assembly within the valve seat gland ensures continuous contact between the valve seat O-ring and the ball surface, creating an adaptive sealing force that automatically compensates for minor displacements during deep-sea pressure differentials. A combination of dumbbell and rectangular sealing rings creates a multi-stage annular sealing groove between the valve body gland and the housing, providing dual protection against high-pressure leakage from both the axial and radial directions of the valve stem.

[0038] The sleeve assembly not only supports the rotation of the valve core ball but also effectively reduces friction and wear. The inner ring fits over the outer step of the ball to ensure concentricity between the ball and the valve stem. The support plate rigidly engages the inner step of the housing, creating a stable mounting base. The adjustment pad adjusts the contact pressure between the sleeve and the ball, ensuring smooth sliding while minimizing the risk of sticking. The double-ended symmetrical sleeve arrangement ensures that the entire valve core and stem assembly maintains constant force balance under high-pressure loads.

[0039] To prevent high-pressure seawater from intruding into the sphere, a safety pressure relief hole is located at the top of the sphere. If a sudden pressure change causes a collision within the valve stem, water can be quickly discharged through this hole, preventing failure of the stem's internal components due to hydraulic shock. Furthermore, positioning holes at the base of the valve core and the bottom of the stem precisely define the relative position of the components within the housing, ensuring that all components remain coaxial and free of radial play during multiple opening and closing cycles.

[0040] The overall assembly process utilizes specialized tooling jaws to precisely pre-assemble the valve seat and body. The initial contact stress between the valve core ball and the seal is precisely controlled by the tightening depth of the threaded sleeve and hexagon socket screw. During disassembly or maintenance, the jaws can be quickly released by reversing the action. The spring rebound effect allows for a gradual separation of the seal and ball, minimizing operational risk and reducing mechanical wear on the sealing surface.

[0041] During system operation, the ball valve seamlessly switches between flow regulation and full opening and closing via manual or automated actuators. Under high pressure, the spring assembly continuously applies moderate preload to the seal, ensuring reliable sealing in deep-sea environments. Furthermore, the low-friction fit of the sleeve assembly and the pressure differential protection of the safety port ensure long-life, stable valve performance under high-frequency opening and closing conditions.

[0042] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. An interventional flow-controlled high-pressure ball valve, characterized in that: It includes a valve body, a valve core and valve stem assembly, a sleeve assembly, a sealing assembly, a sealing valve seat assembly, a ball valve spring assembly and a valve body sleeve; the valve core and valve stem assembly is inserted into the valve body, the sleeve assembly is coaxially matched with and fixed to the top and bottom ends of the valve core and valve stem assembly, the sealing assembly and the sealing valve seat assembly are coaxially arranged in the valve body and opposite to the valve core and valve stem assembly, and the ball valve spring assembly is accommodated in the sealing valve seat assembly to apply pre-pressure to the sealing valve seat assembly.

2. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: The sleeve assembly includes a support plate, a sleeve body and an adjustment gasket. The support plate is rigidly engaged with the inner cavity step of the valve body. The sleeve body is sleeved on the valve core ball step and is coaxially positioned with the support plate. The adjustment gasket fills the gap between the sleeve body and the valve core ball to adjust the fitting clearance.

3. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: The sealing valve seat assembly includes a front valve seat and a rear valve seat, each of which is equipped with a valve seat sealing gasket and an annular spring. One end of the annular spring presses against the sealing gasket, and the other end presses against the end face of the valve body flow channel to achieve self-compensating sealing.

4. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: A rectangular sealing groove is provided between the valve body pressing sleeve and the valve body flange to accommodate a rectangular sealing ring. The valve body pressing sleeve and the valve stem are concentrically matched and a dumbbell sealing ring and a multi-stage O-ring are respectively provided in the radial direction.

5. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: The valve core ball and the valve stem body are clearance-fitted, and the fitting surfaces are provided with rounded corners and chamfers to reduce friction and wear. The surface of the valve core ball is entirely plated with a wear-resistant coating to increase the service life.

6. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: A safety pressure relief hole is provided on the top of the valve core ball. When a pressure difference occurs in the valve stem cavity under a deep-sea high-pressure environment, the pressure relief hole automatically discharges the fluid in the cavity to prevent damage to the stem body and internal components.

7. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: The flow channel in the valve body is always connected to the external marine environment, and the valve body shell flange is fixed to the external tooling through studs to facilitate direct intervention and rapid replacement under working conditions.

8. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: The contact surface between the sealing valve seat assembly and the valve core ball adopts a spherical sealing structure, and the spherical surface is concentrically matched with the valve seat sealing gasket to achieve high-reliability sealing under large pressure differences.

9. The intervention-type flow-controlled high-pressure ball valve according to claim 1, characterized in that: The lower end of the valve stem is wrapped by a bearing, one end of which is fixed to the valve stem body, and the other end maintains a radial gap with the inner wall of the valve body to stabilize the concentricity of the valve stem under axial and radial forces and prevent deflection.

10. An assembly method for an interventional flow-controlled high-pressure ball valve, characterized in that: The process includes the following steps: a pre-assembly step, inserting the front valve seat sealing gasket, annular spring and rear valve seat into the prefabricated position of the valve body in sequence; inserting the valve core ball, shaft sleeve body, adjustment gasket and support plate and fixing the support plate with hexagon socket screws; installing the valve body compression sleeve, valve stem body and multi-stage sealing ring and tightening the threaded sleeve to achieve rectangular and annular sealing; finally, screwing in the internal threaded cylindrical pin and adjusting the concentricity of each component to complete the assembly of the entire valve.

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