Sea depth pressure self-driven valve execution device

Abstract

The invention discloses a sea depth pressure self-driven valve execution device and aims to solve the problem that an existing deep sea valve execution device depends on an external power source. The executing device comprises a ball valve body, a single-action spring hydraulic cylinder, a two-position three-way electromagnetic directional valve control unit, a filter, a valve shell, a valve flow distribution plate, a two-position three-way electromagnetic directional valve and a shifting fork mechanism. The single-acting spring hydraulic cylinder is driven to drive the shifting fork mechanism to act to realize opening and closing of the ball valve body; an external power supply is not needed, the structure is simplified, the anti-interference capacity is high, the response speed is high, the device is suitable for large-depth and ultrahigh-pressure marine operation environments and the like, and the operation reliability and long-term stability of the deep sea valve can be remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of deep-sea operation equipment technology, specifically relating to a self-driven valve actuator for deep-sea pressure. Background Technology

[0002] As the exploration and development of deep-sea oil and gas resources deepens, the technical requirements for deep-sea operational equipment are increasingly stringent. In deep-sea applications, valves, as a core component of critical equipment such as offshore platforms, ships, and vessels, need to open and close without jamming within a specified time. Valve actuators are primarily used to control the opening and closing of valves, and common deep-sea valve actuation methods include electric and hydraulic actuation. However, these traditional actuation methods typically rely on an external power source for continuous power, resulting in high energy consumption and increased system complexity. For these reasons, there is an urgent need in the field to design a low-energy, simple, self-driven valve actuator that can utilize ocean depth pressure as a driving source, providing long-term stable operational assurance for valve opening and closing under the high pressure environment of the deep sea. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a deep-sea pressure self-driven valve actuator that can effectively control the valve opening and closing status of deep-sea operation equipment. Seawater is filtered before entering the device to prevent suspended sand or particulate matter from entering the system and causing damage or jamming to the actuator. Subsequently, a two-position three-way solenoid directional valve controls the seawater to enter a single-acting spring hydraulic cylinder, causing the piston rod of the hydraulic cylinder to extend. The single-acting spring hydraulic cylinder and the shift fork serve as a transmission mechanism to open the valve. This self-driven valve actuator does not rely on traditional motor drive systems or various integrated pumps for power; instead, it utilizes deep-sea pressure as the driving force, providing a simple and effective method for valve opening and closing control in deep-sea operations. This technical solution significantly improves the reliability and stability of deep-sea drive devices, and is particularly suitable for deep-sea environments at great depths.

[0004] To achieve the above objectives, the present invention provides the following specific technical solution:

[0005] A deep-sea pressure self-driven valve actuator includes a ball valve body and a valve actuator housing located above the ball valve body. The valve actuator housing is equipped with a single-acting spring hydraulic cylinder, a two-position three-way solenoid directional valve control unit, a filter, a two-position three-way solenoid directional valve, and a shift fork mechanism.

[0006] The two-position three-way solenoid directional valve is provided with a P port, an A port, and a B port, and is equipped with a valve distribution plate; the valve distribution plate has a flow channel corresponding to the two-position three-way solenoid directional valve; the filter is connected to the P port of the two-position three-way solenoid directional valve and is used to filter seawater impurities; the rodless chamber of the single-acting spring hydraulic cylinder is connected to the B port of the two-position three-way solenoid directional valve, and the rod chamber of the single-acting spring hydraulic cylinder is connected to the dry compartment of the atmospheric or deep-sea device; the shift fork mechanism is connected to the piston rod of the single-acting spring hydraulic cylinder and the valve stem of the ball valve body respectively; the two-position three-way solenoid directional valve microcontroller is electrically connected to the two-position three-way solenoid directional valve and is used to control its working state.

[0007] In a preferred embodiment of the present invention, the two-position three-way electromagnetic directional valve includes a pilot valve plug, a rectangular spring, a short push rod with a large ball socket, a first valve core, a first valve seat, an intermediate spindle-shaped valve stem, an intermediate valve sleeve, a second valve core, a second valve seat, a push rod with a large ball socket, a large valve sleeve, a third valve core, a push rod guide sleeve, a valve base, a sealing ring clamping nut, an O-ring, a proportional electromagnet, and an eddy current displacement sensor.

[0008] The pilot valve plug and the directional valve body are connected by threads. The rectangular spring is housed in the pilot valve plug and abuts against the large ball socket of the short push rod. The spherical surface of the first valve core contacts the large ball socket of the short push rod and the intermediate spindle-shaped valve stem, respectively, and achieves a seal with the first valve seat through the preload of the rectangular spring. The intermediate spindle-shaped valve stem is housed in the intermediate valve sleeve, and its other end contacts the second valve core. The large ball socket of the push rod contacts the spherical surface of the second valve core and is housed in the push rod guide sleeve and the valve base. The lever mechanism cooperates with the proportional electromagnet and the large ball socket of the push rod to amplify the thrust. The eddy current displacement sensor is used to monitor the displacement of the third valve core.

[0009] In a preferred embodiment of the present invention, the lever mechanism includes a lever screw, a lever, a lever shaft, a lever slide shaft, a self-aligning ball, and a lever mechanism housing; the push rod of the proportional electromagnet is connected to the self-aligning ball, the self-aligning ball abuts against one end of the lever, the lever is fixed by the lever shaft and the lever slide shaft, and the lever screw is connected to the other end of the lever and cooperates with the push rod's large ball socket.

[0010] In a preferred embodiment of the present invention, the filter includes a filter body and a custom filter valve seat; the custom filter valve seat is threaded to the filter body and bolted to the directional valve body; the lower end of the custom filter valve seat has an inlet that is directly connected to the ocean, and the filter accuracy is 20~50μm.

[0011] In a preferred embodiment of the present invention, the single-acting spring hydraulic cylinder includes a hydraulic cylinder body, a piston rod, a spring, and a piston; the spring is disposed in the rod cavity, with one end abutting against the piston and the other end abutting against the end of the hydraulic cylinder body; the piston rod is made of stainless steel and its surface is chrome-plated.

[0012] In a preferred embodiment of the present invention, the shift fork mechanism includes a shift fork body, a cylinder rod shift fork connector, a shift fork assembly connecting block copper sleeve, a piston rod threaded head fixing ring, a piston rod threaded head, a slider shift fork drive shaft, a spherical self-aligning adapter, and a guide rod; the guide rod passes through both ends of the valve actuator housing and is connected to the cylinder rod shift fork connector; the cylinder rod shift fork connector is connected to the shift fork body via the slider shift fork drive shaft, and a sliding groove is provided at the mating point between the valve actuator housing and the slider shift fork drive shaft; a shift fork counterweight is provided on the shift fork body.

[0013] In a preferred embodiment of the present invention, the flow passage of the valve actuator housing is connected by a ball-expanding plug; the valve actuator housing is made of titanium alloy or high-strength aluminum alloy; and the fluid flowing through the two-position three-way solenoid directional valve is seawater or flame-retardant hydraulic fluid.

[0014] In a preferred embodiment of the present invention, the two-position three-way solenoid valve control unit controls the fluid flow rate and direction by adjusting the driving frequency and idle ratio of the proportional electromagnet; the lever mechanism of the two-position three-way solenoid valve has an amplification ratio of 1:5.5.

[0015] In a preferred embodiment of the present invention, when the proportional electromagnet is de-energized, port A and port B are connected, the piston rod retracts, and the valve closes; when the proportional electromagnet is energized, port P and port B are connected, seawater drives the piston rod to extend, which in turn drives the shift fork mechanism to rotate, and the valve opens.

[0016] In a preferred embodiment of the present invention, the functional structures within the self-driven ocean pressure valve actuator are not directly connected to the external marine environment.

[0017] Compared with the prior art, the valve device for deep sea applications provided by this invention has the following main advantages:

[0018] (1) Compared with existing deep-sea valve devices, the self-driven valve actuator of the present invention uses deep-sea pressure as the driving force, requiring no external power source (power supply), effectively avoiding problems such as difficult maintenance, high power consumption, and complex device. This self-driven solution simplifies the system structure, reduces the complexity of equipment control, and improves the stability and long-term working capability of the system.

[0019] (2) The two-position three-way solenoid directional valve controls the flow direction of fluid through an electromagnet and cleverly achieves the purpose of large thrust by adopting the lever amplification principle. This simplifies the hydraulic transmission and control process, and the hydraulic system has a faster response speed, avoiding the control delay that may occur in traditional motor drive systems, thus ensuring the real-time performance of valve control in deep-sea operations. In terms of national defense strategy, the deep-sea self-driven valve actuator is suitable for deep-sea, military, and highly sensitive operating environments.

[0020] (3) The power source of the self-driven rotary valve actuator changes with the sea depth, which effectively avoids problems such as energy consumption and leakage of motor drive under high pressure. The deep-sea pressure drive system achieves complete self-sufficiency in energy, reduces energy costs in long-term operation, and ensures the continuous stability of the device in the deep-sea environment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall assembly of a deep-sea self-driven valve actuator provided in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of a deep-sea self-driven valve device system provided in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the connection structure between a shift fork mechanism and a single-acting spring hydraulic cylinder, provided for an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the assembly of a two-position three-way solenoid directional valve and a valve distribution plate provided in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the internal structure of a two-position three-way solenoid directional valve provided in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of a lever mechanism structure provided in an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of a ball-expanding plug structure for a valve actuator housing provided in an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of a two-position three-way electromagnetic reversing valve provided in an embodiment of the present invention.

[0030] In the diagram: 1. Ball valve body; 2. Spring hydraulic cylinder; 3. Two-position three-way solenoid directional valve control unit; 4. Filter; 5. Valve actuator housing; 6. Valve distribution plate; 7. Two-position three-way solenoid directional valve; 7-1. Pilot valve plug; 7-2. Rectangular spring; 7-3. Short push rod with large ball socket; 7-4. First valve core; 7-5. First valve seat; 7-6. Intermediate shuttle-shaped valve stem; 7-7. Intermediate valve sleeve; 7-8. Second valve core; 7-9. Second valve seat; 7-10. Push rod with large ball socket; 7-11. Large valve sleeve; 7-12. Third valve core; 7-13. Push rod guide sleeve; 7-14. Valve base; 7-15. Compression nut; 8. Eddy current displacement sensor; 9. Slider fork drive shaft; 10. Fork body; 11. Fork counterweight; 12. Cylinder rod fork connector; 13. Guide rod; 14. Electromagnet plug; 15. Displacement sensor mounting flange; 16. Proportional electromagnet; 17. Lever; 17-1. Lever screw; 17-2. Lever shaft; 17-3. Lever sliding shaft; 17-4. Self-aligning ball; 17-5. Lever mechanism housing; 18. Lever amplifier upper cover; 19. Lever mechanism housing mounting screw; 20. Electromagnet mounting screw. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The terms "upper," "lower," "front," "rear," "left," and "right," etc., used when describing the installation position or direction of the structure or components in this embodiment are based on the orientation shown in the accompanying drawings. They are merely for convenience of description, used to distinguish the relative positions of various components or directions, and do not represent the orientation of the device or functional component in this embodiment during use.

[0032] like Figures 1-7 As shown, this embodiment of the invention provides a deep-sea pressure self-driven valve actuator, characterized in that it includes a ball valve body 1 and a valve actuator housing 5 located above the ball valve body 1. The valve actuator housing 5 is equipped with a single-acting spring hydraulic cylinder 2, a two-position three-way solenoid directional valve control unit 3, a filter 4, a two-position three-way solenoid directional valve 7, and a shift fork mechanism.

[0033] The two-position three-way solenoid directional valve 7 is equipped with a P port, an A port, and a B port, and is fitted with a valve distribution plate 6; the valve distribution plate 6 has flow channels corresponding to the two-position three-way solenoid directional valve 7; the filter 4 is connected to the P port of the two-position three-way solenoid directional valve 7 and is used to filter seawater impurities; the rodless chamber of the single-acting spring hydraulic cylinder 2 is connected to the B port of the two-position three-way solenoid directional valve 7, and the rod chamber of the single-acting spring hydraulic cylinder 2 is connected to the dry compartment of the atmospheric or deep-sea equipment; the shift fork mechanism is connected to the piston rod of the single-acting spring hydraulic cylinder 2 and the valve stem of the ball valve body 1 respectively; the two-position three-way solenoid directional valve microcontroller seawater 3 is electrically connected to the two-position three-way solenoid directional valve 7 and is used to control its working state.

[0034] The two-position three-way solenoid directional valve 7 includes a pilot valve plug 7-1, a rectangular spring 7-2, a short push rod with a large ball socket 7-3, a first valve core 7-4, a first valve seat 7-5, an intermediate shuttle-shaped valve stem 7-6, an intermediate valve sleeve 7-7, a second valve core 7-8, a second valve seat 7-9, a push rod with a large ball socket 7-10, a large valve sleeve 7-11, a third valve core 7-12, a push rod guide sleeve 7-13, a valve base 7-14, a sealing ring clamping nut 7-15, an O-ring, a proportional electromagnet 16, and an eddy current displacement sensor 8.

[0035] The pilot valve plug 7-1 is threadedly connected to the directional valve body. A rectangular spring 7-2 is housed within the pilot valve plug 7-1 and abuts against the short push rod large ball socket 7-3. The spherical surface of the first valve core 7-4 contacts the short push rod large ball socket 7-3 and the intermediate shuttle-shaped valve stem 7-6 respectively, and the seal with the first valve seat 7-5 is achieved by the preload of the rectangular spring 7-2. The intermediate shuttle-shaped valve stem 7-6 is housed within the intermediate valve sleeve 7-7, and the other end contacts the second valve core 7-8. The push rod large ball socket 7-10 contacts the spherical surface of the second valve core 7-8 and is housed within the push rod guide sleeve 7-13 and the valve base 7-14. The lever mechanism, in conjunction with the proportional electromagnet 16 and the push rod large ball socket 7-10, is used to amplify the thrust. The eddy current displacement sensor 8 is used to monitor the displacement of the third valve core 7-12.

[0036] The pilot valve plug 7-1, first valve seat 7-5, intermediate valve sleeve 7-7, second valve seat 7-9, large valve sleeve 7-11, push rod guide sleeve 7-13, and valve base 7-14 are sequentially abutted against each other and are all housed within the body of the two-position three-way solenoid directional valve. Since the intermediate shuttle-shaped valve stem 7-6 is housed in the intermediate valve sleeve, it reciprocates with the energization and de-energization of the electromagnet. The intermediate shuttle-shaped valve stem 7-6 is in contact with the first valve core 7-4. Therefore, when de-energized, the intermediate shuttle-shaped valve stem 7-6 pushes the second valve core 7-8 to the right; when energized, the intermediate shuttle-shaped valve stem 7-6 pushes the first valve core 7-4 to the left. The first valve core 7-4 is equipped with the two-position three-way solenoid directional valve port A. Therefore, when the electromagnet is de-energized, the two-position three-way solenoid directional valve port A is connected to port B; when the electromagnet is energized, the two-position three-way solenoid directional valve port P is connected to port B. Power outage: Move to the right; Power on: Move to the left.

[0037] The lever mechanism includes a lever screw 17-1, a lever 17, a lever shaft 17-2, a lever slide shaft 17-3, a self-aligning ball 17-4, and a lever mechanism housing 17-5; the push rod of the proportional electromagnet 16 is connected to the self-aligning ball, the self-aligning ball abuts against one end of the lever 17, the lever 17 is fixed by the lever shaft 17-2 and the lever slide shaft 17-3, the lever screw 17-1 is connected to the other end of the lever 17 and cooperates with the push rod's large ball socket 7-10.

[0038] When the proportional electromagnet is de-energized, ports A and B are connected, the piston rod retracts, and the valve closes. When the proportional electromagnet is energized, ports P and B are connected, seawater drives the piston rod to extend, which in turn rotates the fork mechanism, opening the valve. The functional structures within the self-driven ocean depth pressure valve actuator are not directly connected to the external marine environment.

[0039] Filter 4 includes a filter body and a custom filter valve seat; the custom filter valve seat is threaded to the filter body and bolted to the directional valve body; the lower end of the custom filter valve seat has an inlet that is directly connected to the ocean, and the filtration accuracy of filter 4 is 20~50μm.

[0040] The single-acting spring hydraulic cylinder 2 includes a hydraulic cylinder body, a piston rod, a spring, and a piston; the spring is located in the rod chamber, with one end abutting against the piston and the other end abutting against the end of the hydraulic cylinder body; the piston rod is made of stainless steel and its surface is chrome-plated.

[0041] The shift fork mechanism includes a shift fork body 10, a cylinder rod shift fork connector 12, a shift fork assembly connecting block copper sleeve, a piston rod threaded head retaining ring, a piston rod threaded head, a slider shift fork drive shaft 9, a spherical self-aligning adapter, and a guide rod 13. The guide rod 13 passes through both ends of the valve actuator housing 5 and is connected to the cylinder rod shift fork connector 12; the cylinder rod shift fork connector 12 is connected to the shift fork body 10 via the slider shift fork drive shaft 9, and a sliding groove is provided at the mating point between the valve actuator housing 5 and the slider shift fork drive shaft 9; a shift fork counterweight 11 is provided on the shift fork body 10. The cylinder rod shift fork connector 12 is longitudinally connected to both the guide rod and the hydraulic cylinder piston rod, allowing the shift fork structure to slide smoothly during movement via the guide rod.

[0042] The flow passage of the valve actuator housing 5 is connected with a ball-expanding plug for sealing and aesthetic purposes. The valve actuator housing 5 is made of titanium alloy or high-strength aluminum alloy; the fluid flowing through the two-position three-way solenoid directional valve 7 is seawater or flame-retardant hydraulic fluid. The microcontroller 3 of the two-position three-way solenoid directional valve controls the fluid flow rate and direction by adjusting the driving frequency and idle ratio of the proportional electromagnet; the lever mechanism of the two-position three-way solenoid directional valve 7 has an amplification ratio of 1:5.5.

[0043] The actuator also includes an electromagnet plug 14, a displacement sensor mounting flange 15, a lever amplifier upper cover 18, lever mechanism housing mounting screws 19, and an electromagnet mounting screw 20.

[0044] The above-mentioned two-position three-way solenoid directional valve has ports P, A, and B, which respectively handle different liquid flow directions. To better regulate and control the direction and flow rate of the liquid, and to ensure that the liquid flows into each component according to design requirements, the valve distribution plate has the same flow channel as the valve body of the two-position three-way solenoid directional valve. The two are connected by an internal hexagonal connector. The valve distribution plate and the valve actuator body are also connected by an internal hexagonal connector. Port P is connected to the filter; seawater flows into port P after passing through the filter and the distribution plate. Port B's flow channel is connected to the inlet of the single-acting spring hydraulic cylinder. Port A's flow channel is connected to the dry compartment of atmospheric or deep-sea equipment. The lower end of the filter valve seat has an inlet that is directly connected to the ocean. Seawater enters the filter body through the filter valve seat and undergoes a certain degree of filtration of suspended sand particles before flowing into the internal flow channel of the valve body to the P port of the valve distribution plate. Since the proportional electromagnet is not energized at this time, the first valve core in the two-position three-way electromagnet reversing valve body is tangent to the large ball socket end of the short push rod through the preload of the rectangular spring. Since the seawater entering the P port has a certain pressure, the seawater enters the valve plug cavity and acts together with the rectangular spring on the ball surface of the first valve core, ensuring sufficient sealing reliability when the entire mechanism has not yet been activated.

[0045] When the proportional electromagnet is energized, the electromagnet pusher pushes the self-aligning ball to press down the lever. The other end of the lever is connected to the lever shaft and lever slide shaft to fix the lever. Therefore, the lever can only move up and down. When viewed directly from the lever mechanism, the movement trajectory is as follows: After the lever is pressed down by the self-aligning ball, the lever screw is driven to move upward because it is connected to the other end of the lever. At this time, the P port of the two-position three-way solenoid directional valve opens, and seawater flows into the B port of the two-position three-way solenoid directional valve through the P port. The B port of the valve distribution plate has a flow channel connected to the flow channel in the valve body, which is connected to the inlet of the single-acting spring hydraulic cylinder. The inlet of the single-acting spring hydraulic cylinder is located in the rodless chamber of the single-acting piston spring hydraulic cylinder. The rod chamber of the single-acting piston spring hydraulic cylinder has an outlet, which is connected to the atmosphere or the dry compartment of the deep-sea device. That is, the rod chamber of the single-acting piston spring hydraulic cylinder is pressurized. The area difference and pressure difference between the rodless and rodless chambers of the single-acting spring hydraulic cylinder push the single-acting piston rod to overcome the spring compression force and extend horizontally, pushing the shift fork mechanism to rotate from 45° to -45°, driving the valve stem to rotate, thereby opening the valve core of the ball valve body. At this time, deep-sea operations are carried out.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-driven valve actuator for deep-sea pressure, characterized in that, Includes a ball valve body (1) and a valve actuator housing (5) located above the ball valve body (1). The valve actuator housing (5) is equipped with a single-acting spring hydraulic cylinder (2), a two-position three-way solenoid directional valve control unit (3), a filter (4), a two-position three-way solenoid directional valve (7), and a shift fork mechanism. The two-position three-way solenoid directional valve (7) is provided with a P port, an A port and a B port, and is equipped with a valve distribution plate (6); the valve distribution plate (6) is provided with a flow channel corresponding to the two-position three-way solenoid directional valve (7); the filter (4) is connected to the P port of the two-position three-way solenoid directional valve (7) and is used to filter seawater impurities; the rodless chamber of the single-acting spring hydraulic cylinder (2) is connected to the B port of the two-position three-way solenoid directional valve (7), and the rod chamber of the single-acting spring hydraulic cylinder (2) is connected to the dry compartment of the atmospheric or deep-sea device; the shift fork mechanism is connected to the piston rod of the single-acting spring hydraulic cylinder (2) and the valve stem of the ball valve body (1) respectively; the two-position three-way solenoid directional valve control unit (3) is electrically connected to the two-position three-way solenoid directional valve (7) and is used to control its working state.

2. The deep-sea pressure self-driven valve actuator according to claim 1, characterized in that, The two-position three-way solenoid directional valve (7) includes a pilot valve plug (7-1), a rectangular spring (7-2), a short push rod ball socket (7-3), a first valve core (7-4), a first valve seat (7-5), an intermediate shuttle-shaped valve stem (7-6), an intermediate valve sleeve (7-7), a second valve core (7-8), a second valve seat (7-9), a push rod ball socket (7-10), a large valve sleeve (7-11), a third valve core (7-12), a push rod guide sleeve (7-13), a valve base (7-14), a sealing ring clamping nut (7-15), an O-ring, a proportional electromagnet (16), and an eddy current displacement sensor (8). The pilot valve plug (7-1) is threadedly connected to the directional valve body. The rectangular spring (7-2) is housed within the pilot valve plug (7-1) and abuts against the large ball socket (7-3) of the short push rod. The spherical surface of the first valve core (7-4) contacts the large ball socket (21) of the short push rod and the intermediate shuttle-shaped valve stem (7-6) respectively, and the sealing with the first valve seat (7-5) is achieved by the preload of the rectangular spring (7-2). The intermediate shuttle-shaped valve stem (7-6) is housed within... The intermediate valve sleeve (7-7) is located inside the other end, which is in contact with the second valve core (7-8); the push rod large ball socket (7-10) is in contact with the spherical surface of the second valve core (7-8) and is housed in the push rod guide sleeve (7-13) and the valve base (7-14); the lever mechanism cooperates with the proportional electromagnet (16) and the push rod large ball socket (7-10) to amplify the thrust; the eddy current displacement sensor (8) is used to monitor the displacement of the third valve core (7-12).

3. The deep-sea pressure self-driven valve actuator according to claim 2, characterized in that, The lever mechanism includes a lever screw (17-1), a lever (17), a lever shaft (17-2), a lever slide shaft (17-3), a self-aligning ball (17-4), and a lever mechanism housing (17-5); the push rod of the proportional electromagnet (16) is connected to the self-aligning ball (17-4), the self-aligning ball (17-4) abuts against one end of the lever (17), the lever (17) is fixed by the lever shaft (17-2) and the lever slide shaft (17-3), and the lever screw (17-1) is connected to the other end of the lever (17) and cooperates with the push rod large ball socket (7-10).

4. The deep-sea pressure self-driven valve actuator according to claim 3, characterized in that, The filter (4) includes a filter body and a custom filter valve seat; the custom filter valve seat is threaded to the filter body and bolted to the directional valve body; the lower end of the custom filter valve seat is provided with an inlet that is directly connected to the ocean, and the filtration accuracy of the filter (4) is 20~50μm.

5. The deep-sea pressure self-driven valve actuator according to claim 4, characterized in that, The single-acting spring hydraulic cylinder (2) includes a hydraulic cylinder body, a piston rod, a spring and a piston; the spring is set in the rod cavity, with one end abutting against the piston and the other end abutting against the end of the hydraulic cylinder body; the piston rod is made of stainless steel and its surface is chrome-plated.

6. The deep-sea pressure self-driven valve actuator according to claim 5, characterized in that, The shift fork mechanism includes a shift fork body (10), a cylinder rod shift fork connector (12), a shift fork mechanism assembly connecting block copper sleeve, a piston rod threaded head fixing ring, a piston rod threaded head, a slider shift fork drive shaft (9), a spherical center adapter, and a guide rod (13). The guide rod (13) passes through both ends of the valve actuator housing (5) and is connected to the cylinder rod shift fork connector (12). The cylinder rod shift fork connector (12) is connected to the shift fork mechanism body (10) through the slider shift fork drive shaft (9). A sliding groove is provided at the mating point between the valve actuator housing (5) and the slider shift fork drive shaft (9). A shift fork counterweight (11) is provided on the shift fork body (10).

7. The deep-sea pressure self-driven valve actuator according to claim 6, characterized in that, The flow passage of the valve actuator housing (5) is connected by a ball expansion plug; the valve actuator housing (5) is made of titanium alloy or high-strength aluminum alloy; the liquid flowing through the two-position three-way solenoid valve (7) is seawater or fire-retardant hydraulic fluid.

8. The deep-sea pressure self-driven valve actuator according to claim 7, characterized in that, The two-position three-way solenoid valve microcontroller (3) controls the fluid flow rate and direction by adjusting the driving frequency and idle ratio of the proportional electromagnet; the lever mechanism of the two-position three-way solenoid valve (7) has an amplification ratio of 1:5.

5.

9. The deep-sea pressure self-driven valve actuator according to claim 8, characterized in that, When the proportional electromagnet is de-energized, ports A and B are connected, the piston rod retracts, and the valve closes; when the proportional electromagnet is energized, ports P and B are connected, seawater drives the piston rod to extend, which in turn rotates the shift fork mechanism, and the valve opens.

10. The deep-sea pressure self-driven valve actuator according to claim 1, characterized in that, The deep-sea pressure self-driven valve actuator is used for navigating the cabin, and the functional structures within the actuator are not directly connected to the external marine environment.

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