Integrated deep sea hydraulic control valve box

Abstract

The invention relates to an integrated deep sea hydraulic control valve box. The device comprises a box body, the box cover is hermetically mounted at the first opening end of the box body; the valve block comprises an installation end face installed at the first opening end of the box body in a sealed mode, a hydraulic cavity is formed among the box cover, the box body and the installation end face, and the hydraulic cavity is filled with hydraulic oil; the integrated valve group is mounted on the valve block; the integrated valve set comprises a plurality of electromagnetic control valves located in the hydraulic cavity, and a pressure balance opening is formed in a coil shell of each electromagnetic control valve. The differential pressure compensator comprises a compensator shell, a compensation film, a base and a sealing piece. According to the integrated deep sea hydraulic control valve box, the differential pressure compensator and the integrated valve set are effectively integrated, the integrated deep sea hydraulic control valve box can adapt to underwater environment pressure changes, real-time pressure compensation is achieved, the performance and safety of the underwater valve box are improved, the weight of the underwater valve box is reduced, and the service life of the underwater valve box is prolonged. Therefore, the weight power consumption of the underwater operation submersible vehicle is reduced, and the overall space of the underwater operation submersible vehicle is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep sea exploration and deep sea operation tools, and in particular to an integrated deep sea hydraulic control valve box. Background Art

[0002] The research and development of deep-sea technology is experiencing a leapfrog development, and various deep-sea technologies and weapons are showing a steady growth trend. As human exploration of the ocean field gradually intensifies, the fields of seabed minerals and oil and gas resources, deep-sea biological resources and deep-sea water resources have been confirmed to have development value or potential.

[0003] The use of deep-sea exploration and development equipment is currently the main means of investigating and obtaining deep-sea resources. Global deep-sea equipment technology is booming, technological innovations are emerging in an endless stream, the operating depth is getting deeper, and deep-sea equipment is developing in the direction of automation, greening, integration, and intelligence. In recent years, human beings have greatly improved their ability to conduct deep-sea exploration and deep-sea operations. Deep-sea equipment with different diving depths, different functions, different sizes, and high intelligence will achieve modular and pedigree development, highlighting technical features such as autonomous environmental perception, autonomous navigation planning, autonomous operation, group collaboration, precise positioning and navigation, and long-term underwater residence. The application in the fields of underwater reconnaissance, scientific investigation, resource exploration and development operations in the deep sea (including the abyss) and polar regions has basically matured, becoming the main equipment for deep-sea operations. Super-large manned equipment and cutting-edge intelligent unmanned technology are organically integrated, and various general-purpose deep-sea equipment has the ability to work efficiently with manned and unmanned, small and large, and point, line, and surface areas.

[0004] At present, in the field of deep-sea operations, hydraulic working tools with large torque and rapid response capabilities are essential for deep-sea operations. In order to drive these underwater hydraulic actuators, deep-sea submersibles are equipped with hydraulic valve boxes. The general underwater hydraulic system mainly includes a pressure compensation device, a control valve box, an underwater power source and an actuator, among which the underwater valve box is a key component connecting the hydraulic system and the hydraulic actuator. The valve box is a relay station for hydraulic power and control signals. It is necessary to isolate the components in the valve box from seawater and ensure the reliability of the connection. The usual underwater valve box uses a valve box cover to protect all hydraulic valves and seawater-resistant components to form a large pressure-resistant closed space. This method is easy to implement, but as the operating depth of the deep-sea submersible becomes deeper and deeper, the environmental pressure received by the underwater valve box becomes higher and higher. In order to ensure the shell pressure resistance of the underwater valve box, the volume of the underwater valve box becomes larger and larger, and the weight also increases exponentially, which brings a huge power consumption burden to the deep-sea submersible, and there is still a risk of water seepage. Summary of the invention

[0005] To this end, the present invention provides an integrated deep-sea hydraulic control valve box, which can solve the problem of the influence of seawater pressure on the working reliability and feasibility of the underwater valve box in the prior art. The integrated deep-sea hydraulic control valve box effectively integrates the pressure difference compensator and the integrated valve group, can adapt to the changes in underwater environmental pressure, realize real-time pressure compensation, improve the performance and safety of the underwater valve box, and reduce the weight of the underwater valve box, thereby reducing the power consumption of the underwater operating submersible and saving the overall space of the underwater operating submersible.

[0006] In order to solve the above technical problems, the present invention provides an integrated deep-sea hydraulic control valve box, comprising:

[0007] The box body comprises a first opening end and a second opening end which are arranged opposite to each other, and a pressure difference compensation hole is arranged on a side of the box body;

[0008] A box cover, sealed and mounted on the first opening end of the box body;

[0009] A valve block, comprising a mounting end face sealingly mounted on a first open end of the box body, wherein a hydraulic cavity is formed between the box cover, the box body and the mounting end face, and the hydraulic cavity is filled with hydraulic oil;

[0010] An integrated valve group is installed on the valve block; wherein the integrated valve group includes a plurality of electromagnetic control valves located inside the hydraulic cavity, the electromagnetic control valve includes a coil housing and an electromagnetic coil located inside the coil housing, and a pressure balance port is provided on the coil housing so that the hydraulic oil in the hydraulic cavity enters into the coil housing through the pressure balance port to balance the pressure inside and outside the coil housing, so as to meet the requirements of the electromagnetic control valve to adapt to safe and reliable operation under external high-pressure environment;

[0011] A pressure differential compensator comprises a compensator housing, a compensation membrane, a base and a sealing member, wherein the compensation membrane is installed between the compensator housing and the base, the base comprises a connecting portion connected to the pressure differential compensation hole, the sealing member is arranged between the pressure differential compensation hole and the connecting portion, the compensation membrane comprises a compensation cavity having a first opening, the first opening faces the connecting portion and is connected to the interior of the casing through the connecting portion, and a second opening is arranged on the compensator housing to connect the compensation membrane to the external environment, so that the external environment pressure compresses the compensation membrane and maintains the oil pressure in the hydraulic cavity equal to the external environment pressure.

[0012] In one embodiment of the present invention, the compensation cavity comprises a cylindrical segment and a convex spherical segment axially extending from the cylindrical segment, a circular chamfered surface coaxially arranged with the cylindrical segment is arranged in the middle of the convex spherical segment, the first opening is formed at one end of the cylindrical segment, and a mounting edge is radially extended along the cylindrical segment;

[0013] The base comprises a connecting plate, an annular platform axially extends along the periphery of the inner side end of the connecting plate, a first thread is arranged on the outer circle of the annular platform, and a limiting boss extends from the inner ring edge of the annular platform;

[0014] The compensator housing comprises a cylinder, a radial annular plate extending radially outward from the cylinder, and an axial annular plate extending vertically from the radial annular plate, the compensating cavity is accommodated in the cylinder, one end of the cylinder forms the second opening to expose the convex spherical segment, the inner circle of the axial annular plate is provided with a second thread matching the first thread, and the mounting edge extends a convex pressing edge toward the radial annular plate;

[0015] The mounting edge extends between the radial annular plate and the annular platform, the mounting edge is radially limited by the limiting boss, and the convex pressing edge is pressed against the annular platform by the radial annular plate.

[0016] In one embodiment of the present invention, an annular relief groove is provided on the axial annular plate adjacent to the radial annular plate, and a step structure is formed between the annular relief groove and the second thread.

[0017] In one embodiment of the present invention, the annular platform is provided with a first annular mounting groove, and the annular mounting groove is embedded with a first sealing ring located between the annular platform and the radial annular plate.

[0018] In one embodiment of the present invention, the connecting portion is constructed as a hollow threaded column extending axially to the middle of the outer end of the connecting disk, and the hollow threaded column is threadedly connected to the pressure difference compensation hole.

[0019] In one embodiment of the present invention, a notch is provided on the outer circle at the bottom of the hollow threaded column, and an abutment boss extends from the inner end of the connecting disk near the notch. The abutment boss is used to limit the position of the hollow threaded column when it is threadedly connected to the pressure difference compensation hole, and the seal is configured as a second sealing ring located between the notch and the abutment boss.

[0020] In one embodiment of the present invention, the number and size of the pressure difference compensators are determined according to the external environment, wherein the calculation formula for the size of the compensation volume V0 of the pressure difference compensator is:

[0021] V0=V1+V2

[0022] Among them, V1 is the volume compression of the oil inside the hydraulic cavity;

[0023] V1=β W ×V×(P-P0)

[0024] Among them, βW is the liquid compressibility coefficient, MPa -1 ; Ambient temperature 20℃, take β W =0.0006MPa -1 ; V is the initial volume of the oil, m 3 ; P is the maximum external environmental pressure, MPa; P0 is atmospheric pressure, the value is P0 = 0.1 MPa;

[0025] V2 is the volume change caused by the change in oil temperature inside the hydraulic cavity;

[0026] V2=V×β×(T2-T1)

[0027] Wherein, β is the average volume expansion coefficient when the temperature rises from T1 to T2, which is 0.00065 / °C.

[0028] In one embodiment of the present invention, the valve block further comprises a mounting side surface located beside the mounting end surface, the mounting side surface of the valve block further comprises an internal thread interface and an output hydraulic oil circuit interface for the electromagnetic control valve, the integrated valve group further comprises a regulating valve threadedly connected to the internal thread interface, the regulating valve comprises a speed regulating valve and / or a pressure regulating valve;

[0029] The valve block is also provided with an oil filling valve for filling the hydraulic cavity with oil, and the box cover is provided with an air release valve for exhausting the air when the hydraulic cavity is filled with oil;

[0030] The box cover is also equipped with an explosion-proof valve. The explosion-proof valve is designed to open at a pressure of 0.6 bar. When the oil pressure in the box changes due to changes in the external environment temperature or the amount of oil caused by leakage of the hydraulic valve on the integrated valve group, which affects the structural safety of the box, the explosion-proof valve will automatically open to release pressure, effectively protecting the safety and reliability of the integrated deep-sea hydraulic control valve box in the deep-sea environment.

[0031] In one embodiment of the present invention, a watertight socket is also installed on the side of the box body, and an electric signal cable is arranged on the watertight socket. The electric signal cable connects the control line of the electromagnetic control valve and is connected to the watertight socket through an external watertight cable to control the operation of the electromagnetic control valve;

[0032] The mounting end surface of the valve block is also equipped with a water leakage alarm to send out an alarm signal when external seawater leaks into the hydraulic cavity.

[0033] In one embodiment of the present invention, the box cover is made of a transparent material, a first sealing ring is installed between the box cover and the box body, and a second sealing ring is installed between the box body and a mounting end surface of the valve block.

[0034] The above technical solution of the present invention has the following advantages compared with the prior art:

[0035] The integrated deep-sea hydraulic control valve box described in the present invention can adjust the oil pressure of the hydraulic cavity inside the box synchronously with the change of the external deep-sea environmental pressure by arranging a pressure differential compensator (composed of pressure differential compensation holes, compensation membrane, compensator housing and base) on the box body. The compensation cavity of the compensation membrane is connected to the external environment. When the deep-sea environmental pressure increases, the compensation membrane is compressed, and the pressure is synchronously transmitted to the hydraulic oil inside the box body, so as to achieve the pressure balance between the inside of the box body and the external environment. Under the extremely high water pressure conditions in the deep sea, the present invention does not need to resist the external force by thickening the wall thickness of the box body, but uses the compensation membrane for flexible compensation, so as to keep the internal hydraulic oil pressure equal to the external environment, greatly reducing the pressure requirements required for the box body, effectively reducing the structural size and overall weight of the valve box, and improving the long-term working reliability and safety of the underwater valve box carried on the underwater working submersible in the deep-sea environment.

[0036] The coil housing of the electromagnetic control valve in the present invention is connected to the hydraulic cavity inside the box through a pressure balance port, so that the coil housing is filled with hydraulic oil, eliminating the pressure difference problem caused by the formation of a vacuum cavity in a conventional electromagnetic valve. Under deep-sea high-pressure conditions, if there is a vacuum or low-pressure environment in the coil cavity, the external high pressure will easily crush the housing, affecting the normal operation and life of the valve group. By connecting the coil housing to the hydraulic oil and automatically balancing the internal and external pressures, the present invention significantly improves the electromagnetic control valve's ability to resist high pressure in the external environment and its service life, ensuring that the valve box can operate stably and long-term in a deep-sea environment.

[0037] The present invention adopts an integrated design to organically integrate multiple electromagnetic control valves, regulating valves, oil filling valves, air release valves, explosion-proof valves, water leakage alarms and other hydraulic components into a compact valve block and box body. At the same time, through the flexible arrangement and optimized design of the pressure difference compensator, the overall structure can be significantly reduced in size and weight while maintaining high reliability. Compared with the conventional valve box that requires a thick and heavy pressure-resistant shell, the lightweight design of the present invention can effectively reduce the total weight and power consumption load of the equipment in the application fields of deep-sea submersibles, unmanned underwater robots, etc., and improve the operating efficiency and deep-sea maneuverability.

[0038] The integrated deep-sea hydraulic control valve box of the present invention can flexibly set the number and size of differential pressure compensators according to the external environmental pressure, application scenarios and working requirements. By adjusting the regulating valve (speed regulating valve, pressure regulating valve) and internal thread interface installed on the regulating valve block, the output pressure and flow of different actuators can be accurately controlled. At the same time, other functional hydraulic valves and pressure sensors can be integrated on the valve block to meet the diverse needs of deep-sea operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0040] Figure 1 It is a schematic diagram of the overall structure of one side of the integrated deep-sea hydraulic control valve box of the present invention.

[0041] Figure 2 It is a schematic diagram of the overall structure of the other side of the integrated deep-sea hydraulic control valve box of the present invention.

[0042] Figure 3 It is a schematic diagram of the structure of the integrated deep-sea hydraulic control valve box of the present invention behind the hidden box cover.

[0043] Figure 4 It is a structural schematic diagram of the electromagnetic control valve of the present invention.

[0044] Figure 5 It is a schematic diagram of the overall structure of the pressure difference compensator of the present invention.

[0045] Figure 6 It is a schematic diagram of the explosion structure of the pressure difference compensator of the present invention.

[0046] Figure 7 It is a schematic diagram of the half-section axial side structure of the pressure difference compensator of the present invention.

[0047] Figure 8 yes Figure 7 Schematic diagram of the local enlarged structure.

[0048] Fig. 9 It is a schematic diagram of the structure of the compensation film of the present invention.

[0049] Fig.10 It is a structural schematic diagram of the box body of the present invention.

[0050] Fig.11 It is a structural schematic diagram of one side of the valve block of the present invention.

[0051] Fig.12 It is a schematic structural diagram of the other side of the valve block of the present invention.

[0052] Description of the Figures in the Specification:

[0053] 1. Box body; 11. Hydraulic chamber; 12. Pressure difference compensation hole; 13. Watertight socket;

[0054] 2. Box cover; 21. Air release valve; 22. Explosion-proof valve; 23. First sealing ring; 24. Second sealing ring;

[0055] 3. Valve block; 31. Installation end surface; 32. Installation side surface; 33. Internal thread interface; 34. Output hydraulic oil circuit interface; 35. Water leakage alarm;

[0056] 4. Integrated valve group; 41. Solenoid control valve; 411. Pressure balance port; 42. Regulating valve; 43. Oil filling valve;

[0057] 5. Pressure difference compensator; 51. Compensator housing; 511. Cylinder; 511a. Second opening; 512. Radial annular plate; 512a. Convex pressing edge; 512b. Step structure; 513. Axial annular plate; 513a. Annular clearance groove; 52. Compensation membrane; 521. Compensation cavity; 521a. Cylindrical section; 521b. Convex spherical section; 521c. Mounting edge; 521d. First opening; 521e. Circular chamfered surface; 53. Base; 531. Connecting plate; 531a. Abutment boss; 532. Annular platform; 532a. Annular mounting groove; 532b. First sealing ring; 533. Limiting boss; 534. Connecting part; 534a. Hollow threaded column; 534b. Notch; 54. Sealing member. DETAILED DESCRIPTION

[0058] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0059] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0060] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0061] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0062] Reference Figure 1 , Figure 3 , Figure 4 , Figure 6 As shown, an integrated deep-sea hydraulic control valve box of the present invention comprises:

[0063] The box body 1 comprises a first opening end and a second opening end which are arranged opposite to each other, and a pressure difference compensation hole 12 is arranged on the side of the box body 1;

[0064] A box cover 2, sealed and mounted on the first opening end of the box body 1;

[0065] The valve block 3 comprises a mounting end face 31 sealingly mounted on the first open end of the box body 1, wherein a hydraulic cavity 11 is formed between the box cover 2, the box body 1 and the mounting end face 31, and the hydraulic cavity 11 is filled with hydraulic oil;

[0066] An integrated valve group 4 is installed on the valve block 3; wherein the integrated valve group 4 includes a plurality of electromagnetic control valves 41 located inside the hydraulic cavity 11, the electromagnetic control valve 41 includes a coil housing and an electromagnetic coil located inside the coil housing, and a pressure balance port 411 is provided on the coil housing, so that the hydraulic oil in the hydraulic cavity 11 enters the interior of the coil housing through the pressure balance port 411, so as to balance the pressure inside and outside the coil housing;

[0067] The pressure difference compensator 5 includes a compensator housing 51, a compensation membrane 52, a base 53 and a seal 54. The compensation membrane 52 is installed between the compensator housing 51 and the base 53. The base 53 includes a connecting portion 534 connected to the pressure difference compensation hole 12. The seal 54 is arranged between the pressure difference compensation hole 12 and the connecting portion 534. The compensation membrane 52 includes a compensation cavity 521 having a first opening 521d. The first opening 521d faces the connecting portion 534 and is connected to the interior of the box body 1 through the connecting portion 534. The compensator housing 51 is provided with a second opening 511a that connects the compensation membrane 52 to the external environment, so that the external environmental pressure compresses the compensation membrane 52 to maintain the oil pressure in the hydraulic cavity 11 (inside the box body 1) equal to the external environmental pressure.

[0068] It is understandable that the oil pressure in the hydraulic chamber 11 inside the housing 1 can be adjusted synchronously with the changes in the external deep-sea environmental pressure. The compensation chamber 521 of the compensation membrane 52 is connected to the external environment. When the deep-sea environmental pressure increases, the compensation membrane 52 is compressed, and the pressure is synchronously transmitted to the hydraulic oil inside the housing 1, so as to achieve pressure balance between the inside of the housing 1 and the external environment. Under the extremely high water pressure conditions in the deep sea, there is no need to resist the external force by thickening the wall thickness of the housing 1. Instead, the compensation membrane 52 is used for flexible compensation, so as to keep the internal hydraulic oil pressure equal to that of the outside world, which greatly reduces the pressure requirements of the shell structure. This feature effectively reduces the structural size and overall weight of the valve box, and improves the long-term working reliability and safety of the valve box in the deep-sea environment.

[0069] In addition, in order to enable the electromagnetic control valve 41 to adapt to work under external pressure conditions, by setting a pressure balance port 411 (such as two) on the electromagnetic control valve 41, the oil is introduced into the coil housing through the pressure balance port 411, so that the oil pressure inside the coil housing is consistent with the external deep-sea pressure in real time. At this time, the oil inside the box 1 enters the inside of the coil housing from the pressure balance port 411 and contacts the electromagnet coil. Compared with the conventional standard electromagnetic valve, it can avoid the vacuum environment inside the electromagnet coil being compensated by the hydraulic oil inside the box 1. The environmental pressure increases, thereby crushing the electromagnet coil housing. This is because under deep-sea high-pressure conditions, if there is a vacuum or low-pressure environment in the coil cavity, the external high pressure is easy to crush the housing, affecting the normal operation and life of the valve group. By connecting the coil housing with the hydraulic oil and automatically balancing the internal and external pressures, the high-pressure resistance and service life of the electromagnetic control valve 41 are significantly improved, ensuring that the valve box can work stably and long-term in the deep-sea environment.

[0070] Reference Fig. 9 As shown, the compensation cavity 521 includes a cylindrical section 521a and a convex spherical section 521b axially extending from the cylindrical section 521a, a circular cut surface 521e coaxially arranged with the cylindrical section 521a is arranged in the middle of the convex spherical section 521b, the first opening 521d is formed at one end of the cylindrical section 521a, and a mounting edge 521c is radially extended along the cylindrical section 521a; the circular cut surface 521e makes the external environmental pressure evenly applied to the compensation membrane 52, and the convex spherical section 521b can produce flexible deformation when the external environmental pressure changes. When the deep sea pressure increases, the convex spherical section 521b will be compressed and deformed, and the volume of the oil in the cavity will change accordingly, so that the internal oil pressure of the box 1 is consistent with the external pressure. Compared with a pure plane or a single curved surface design, this spherical protrusion structure can more evenly disperse stress, reduce stress concentration, and improve the reliability and life of the compensation membrane 52 under high pressure conditions.

[0071] Reference Figure 7 , Figure 8As shown, the base 53 includes a connecting disk 531, and an annular platform 532 extends axially along the circumference of the inner side end of the connecting disk 531. A first thread is provided on the outer circle of the annular platform 532, and a limiting boss 533 extends from the inner ring edge of the annular platform 532.

[0072] The compensator housing 51 comprises a cylinder 511, a radial annular plate 512 extending radially outward from the cylinder 511, and an axial annular plate 513 extending vertically from the radial annular plate 512. The compensating cavity 521 is accommodated in the cylinder 511. The second opening 511a is formed at one end of the cylinder 511 to expose the convex spherical segment 521b. The inner circle of the axial annular plate 513 is provided with a second thread matching the first thread. A convex pressing edge 512a extends from the mounting edge 521c toward the radial annular plate 512.

[0073] The mounting edge 521 c extends between the radial annular plate 512 and the annular platform 532 , the mounting edge 521 c is radially limited by the limiting boss 533 , and the convex pressing edge 512 a is pressed against the annular platform 532 by the radial annular plate 512 .

[0074] Through the above arrangement, during installation, the compensation film 52 only needs to be placed on the annular platform 532, and the compensator housing 51 is threadedly connected to the base 53, and the convex pressing edge 512a is pressed by the radial annular plate 512 to achieve the pressing and fixing of the installation edge 521c of the compensation film 52. Through the connection method of the thread, the limiting boss 533 and the pressing, no complicated tools are required, so that the compensator can be quickly disassembled and assembled under field conditions.

[0075] Reference Figure 8 As shown, an annular paving groove 513 a is provided on the axial annular plate 513 adjacent to the radial annular plate 512 , and a step structure 512 b is formed between the annular paving groove 513 a and the second thread.

[0076] Specifically, the annular platform 532 is provided with a first annular installation groove 532 a , and the annular installation groove 532 a is embedded with a first sealing ring 532 b located between the annular platform 532 and the radial annular plate 512 .

[0077] Reference Figure 7 As shown, the connecting portion 534 is constructed as a hollow threaded column 534 a extending axially in the middle of the outer end of the connecting disk 531 , and the hollow threaded column 534 a is threadedly connected to the pressure difference compensation hole 12 .

[0078] The base 53 is directly connected to the pressure difference compensation hole 12 through the hollow threaded column 534a, and the connection is compact and firm, and can easily achieve quick docking with the valve box body 1.

[0079] Specifically, refer to Figure 7 As shown, a notch 534b is provided on the outer circle at the bottom of the hollow threaded column 534a, and an abutting boss 531a extends from the inner end of the connecting plate 531 near the notch 534b. The abutting boss 531a is used for limiting the position when the hollow threaded column 534a is threadedly connected to the pressure difference compensation hole 12, and the sealing member 54 is configured as a second sealing ring located between the notch 534b and the abutting boss 531a. It ensures that the compensation hydraulic oil filled in the box body 1 will not leak out, and it can also ensure that the water pressure of the external environment will not penetrate into the box body 1.

[0080] It should be noted that the compensation cavity 521 of the supplementary membrane is a combination of a cylindrical section 521a and a convex spherical section 521b, so that a larger oil compensation volume can be achieved in a limited space. The cylindrical section 521a is used to provide a stable installation reference and circumferential support, so that the compensation membrane 52 can be reliably installed between the compensator housing 51 and the base 53, and ensure that it is closely fitted with the connecting part 534 (such as the annular platform 532, the radial annular plate 512, etc.), forming a stable sealing structure.

[0081] In addition, the differential pressure compensator 5 is easy to disassemble and install. The user can choose to install one or more differential pressure compensators 5 according to the deep-sea working pressure environment, the oil capacity inside the box 1, and the number of functional requirements. The overall size is small, and 2-4 can be installed on the side of the box 1, so that the compensators can be flexibly arranged in the limited valve box layout space. Through the structural design of the differential pressure compensator 5, the structural size of the integrated deep-sea hydraulic control valve box is greatly reduced, and the weight is also reduced, which is convenient for the integrated deep-sea hydraulic control valve box to be carried on deep-sea submersibles and underwater working tools.

[0082] The material of the compensation film 52 is an elastomeric material with high elasticity, high pressure resistance, corrosion resistance and excellent anti-aging performance, such as special rubber, fluororubber or polyurethane elastomer. It can meet the requirements of long-term use in deep sea high pressure, low temperature and highly corrosive seawater environment, and can maintain good elastic deformation ability and sealing performance under extreme deep sea conditions, and will not age quickly or suffer serious performance degradation due to changes in seawater, pressure or temperature.

[0083] Specifically, the number and size of the pressure difference compensator 5 are determined according to the external environment, wherein the calculation formula for the size of the compensation volume V0 of the pressure difference compensator 5 is:

[0084] V0=V1+V2

[0085] Wherein, V1 is the volume compression of the oil inside the hydraulic cavity 11;

[0086] V1=βW ×V×(P-P0)

[0087] Among them, β W is the liquid compressibility coefficient, MPa -1 ; Ambient temperature 20℃, take β W =0.0006MPa -1 ; V is the initial volume of the oil, m 3 ; P is the maximum external environmental pressure, MPa; P0 is atmospheric pressure, the value is P0 = 0.1 MPa;

[0088] V2 is the volume change caused by the change in the oil temperature inside the hydraulic cavity 11;

[0089] V2=V×β×(T2-T1)

[0090] Wherein, β is the average volume expansion coefficient when the temperature rises from T1 to T2, which is 0.00065 / °C.

[0091] When faced with different deep-sea operating depths (corresponding high ambient pressures) and different temperature difference conditions, the required compensation volume can be accurately calculated according to the above formula. This allows the number and size of compensators to be flexibly determined based on the measured or predicted pressure and temperature boundary conditions, without wasting too many compensators or avoiding system pressure imbalance caused by insufficient compensation capacity.

[0092] In one embodiment, referring to Fig.11 As shown, the valve block 3 also includes a mounting side surface 32 located next to the mounting end surface 31, and the mounting side surface 32 of the valve block 3 is also provided with an internal thread interface 33 and an output hydraulic oil circuit interface 34 for the solenoid control valve 41; in order to adapt to long-term operation in an external deep sea water environment, the output hydraulic oil circuit interface 34 is designed to be made of stainless steel or titanium alloy.

[0093] The integrated valve group 4 also includes a regulating valve 42 threadedly connected to the internal thread interface 33. In order to facilitate the adjustment of the operating speed and working pressure of the external actuator driven by the control valve box and adapt to long-term operation in the external deep sea water environment, the regulating valve 42 adopts a speed regulating valve or a pressure regulating valve made of stainless steel or titanium alloy.

[0094] In order to make the inside of the box 1 evenly filled with hydraulic oil, refer to Fig.11 As shown, the valve block 3 is also equipped with an oil filling valve 43 for filling the hydraulic chamber 11 with oil; Figure 1As shown, the box cover 2 is provided with an air release valve 21 (exhaust port) for exhausting the hydraulic cavity 11 when filling oil. The air release valve 21 is specifically arranged at the four corners of the box cover 2. The oil filling valve 43 cooperates with the air release valve 21 to fill the box 1 with hydraulic oil. According to the pressure design of the pressure difference compensator 5, the pre-filled hydraulic oil pressure is between 0.3 and 0.5 bar.

[0095] In order to facilitate the integrated deep-sea hydraulic control valve box to adapt to the changes in land temperature environment and deep-sea environment temperature, refer to Figure 1 As shown, an explosion-proof valve 22 is also installed on the box cover 2 (through a threaded connection), and the opening pressure of the explosion-proof valve 22 is 0.6 bar. When the oil pressure in the hydraulic cavity 11 changes due to changes in the external ambient temperature or changes in the amount of oil caused by leakage of the hydraulic valve on the integrated valve group 4, which affects the structural safety of the box body 1, the explosion-proof valve 22 will automatically open to release the pressure, so that the preset filling pressure value is always maintained in the box body 1, effectively protecting the safety and reliability of the integrated deep-sea hydraulic control valve box working in a deep-sea environment.

[0096] It should be noted that the valve block 3 may also be integrated with hydraulic valve components with other functions, a pressure sensor, and a relief valve for adjusting the input working oil pressure.

[0097] In one embodiment, referring to Figure 2 As shown, a watertight socket 13 is also installed on the side of the box body 1, and an electric signal cable is arranged on the watertight socket 13. The electric signal cable connects the control line of the electromagnetic control valve 41 and is connected to the watertight socket 13 through an external watertight cable to control the operation of the electromagnetic control valve 41;

[0098] Reference Fig.11 As shown, the mounting end surface 31 of the valve block 3 is also equipped with a water leakage alarm 35, which can detect water molecules and immediately send out an alarm signal when the box body 1 is sealed and leaking and external seawater leaks into the box body 1.

[0099] In one embodiment, the box cover 2 is made of a transparent material, such as a transparent PC board, so that the working state of the integrated valve group 4 inside the box body 1 can be observed in real time; the box cover 2 is installed on the top of the box body 1 by screws; Figure 3 As shown, a first sealing ring 23 is installed between the box cover 2 and the box body 1. The sealing ring groove for installing the first sealing ring 23 is designed to be bidirectionally sealed, which can not only ensure that the compensating hydraulic oil filled in the box body 1 will not leak out, but also ensure that the water pressure of the external environment will not penetrate into the box body 1. In addition, the structure of the box body 1 is designed to be an integrated whole, which solves the risk of unstable working structure of the box body 1 processed by welding in deep sea environment. The bottom of the box body 1 is installed on the integrated valve group 4 by screws, refer to Fig.11 As shown, a second sealing ring 24 is installed between the box body 1 and the mounting end surface 31 of the valve block 3, and the sealing ring groove for installing the second sealing ring 24 is designed to be bidirectionally sealed, which can ensure that the compensating hydraulic oil filled in the box body 1 will not leak out, and can also ensure that the water pressure of the external environment will not penetrate into the box body 1.

[0100] The above settings fully consider the convenience of later maintenance and use. The differential pressure compensator 5, the box cover 2 and the bottom mounting screws, the first sealing ring 23 and the second sealing ring 24, the box cover 2 made of transparent PC board, the air release valve 21, the oil filling valve 43, the explosion-proof valve 22, the watertight socket 13, the water leakage alarm 35, etc. are all reasonably arranged and have an optimized sealing structure to achieve rapid assembly and convenient disassembly. The sealing ring groove, explosion-proof valve 22, and air release valve 21 with a two-way sealing design not only ensure the long-term sealing and stability of the equipment in a deep-sea environment.

[0101] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An integrated deep-sea hydraulic control valve box, characterized in that: include: A box body (1) comprises a first opening end and a second opening end which are arranged opposite to each other, and a pressure difference compensation hole (12) is arranged on a side surface of the box body (1); A box cover (2) is sealingly mounted on the first opening end of the box body (1); The valve block (3) comprises a mounting end surface (31) sealingly mounted on the first open end of the box body (1), wherein a hydraulic cavity (11) is formed between the box cover (2), the box body (1) and the mounting end surface (31), and the hydraulic cavity (11) is filled with hydraulic oil; An integrated valve group (4) is mounted on the valve block (3); wherein the integrated valve group (4) comprises a plurality of electromagnetic control valves (41) located inside the hydraulic cavity (11); the electromagnetic control valve (41) comprises a coil housing and an electromagnetic coil located inside the coil housing; a pressure balance port (411) is provided on the coil housing so that the hydraulic oil in the hydraulic cavity (11) enters the interior of the coil housing through the pressure balance port (411) to balance the pressure inside and outside the coil housing; A pressure differential compensator (5) comprises a compensator housing (51), a compensation membrane (52), a base (53) and a sealing member (54); the compensation membrane (52) is installed between the compensator housing (51) and the base (53); the base (53) comprises a connecting portion (534) connected to the pressure differential compensation hole (12); the sealing member (54) is arranged between the pressure differential compensation hole (12) and the connecting portion (534); the compensation membrane (52) comprises a compensation cavity (521) having a first opening (521d); the first opening (521d) faces the connecting portion (534) and is connected to the interior of the housing (1) through the connecting portion (534); the compensator housing (51) is provided with a second opening (511a) for connecting the compensation membrane (52) to the external environment, so that the external environment pressure compresses the compensation membrane (52) and maintains the oil pressure in the hydraulic cavity (11) equal to the external environment pressure.

2. The integrated deep-sea hydraulic control valve box according to claim 1, characterized in that: The compensation cavity (521) comprises a cylindrical section (521a) and a convex spherical section (521b) axially extending from the cylindrical section (521a); ​​a circular cut surface (521e) coaxially arranged with the cylindrical section (521a) is arranged in the middle of the convex spherical section (521b); the first opening (521d) is formed at one end of the cylindrical section (521a); ​​and a mounting edge (521c) extends radially along the cylindrical section (521a); The base (53) comprises a connecting disk (531), an annular platform (532) extending axially along the circumference of the inner side end of the connecting disk (531), a first thread being arranged on the outer circle of the annular platform (532), and a limiting boss (533) extending from the inner ring edge of the annular platform (532); The compensator housing (51) comprises a cylinder (511), a radial annular plate (512) extending radially outward from the cylinder (511), and an axial annular plate (513) extending perpendicularly from the radial annular plate (512); the compensating cavity (521) is accommodated in the cylinder (511); one end of the cylinder (511) forms the second opening (511a) to expose the convex spherical segment (521b); the inner circle of the axial annular plate (513) is provided with a second thread matching the first thread; and the mounting edge (521c) is provided with a convex pressing edge (512a) extending toward the radial annular plate (512); The mounting edge (521c) extends between the radial annular plate (512) and the annular platform (532), the mounting edge (521c) is radially limited by the limiting boss (533), and the convex pressing edge (512a) is pressed against the annular platform (532) by the radial annular plate (512).

3. The integrated deep-sea hydraulic control valve box according to claim 2, characterized in that: An annular relief groove (513a) is provided on the axial annular plate (513) adjacent to the radial annular plate (512), and a step structure (512b) is formed between the annular relief groove (513a) and the second thread.

4. The integrated deep-sea hydraulic control valve box according to claim 2, characterized in that: The annular platform (532) is provided with an annular mounting groove (532a), and the annular mounting groove (532a) is embedded with a first sealing ring (532b) located between the annular platform (532) and the radial annular plate (512).

5. The integrated deep-sea hydraulic control valve box according to claim 2, characterized in that: The connecting portion (534) is constructed as a hollow threaded column (534a) extending axially in the middle of the outer end of the connecting disk (531), and the hollow threaded column (534a) is threadedly connected to the pressure difference compensation hole (12).

6. The integrated deep-sea hydraulic control valve box according to claim 5, characterized in that: A notch (534b) is provided on the outer circle at the bottom of the hollow threaded column (534a), and an abutment boss (531a) extends from the inner end of the connecting plate (531) near the notch (534b). The abutment boss (531a) is used to limit the position of the hollow threaded column (534a) when it is threadedly connected to the pressure difference compensation hole (12). The sealing member (54) is configured as a second sealing ring located between the notch (534b) and the abutment boss (531a).

7. The integrated deep-sea hydraulic control valve box according to claim 1, characterized in that: The number and size of the pressure difference compensators (5) are determined according to the external environment, wherein the calculation formula for the size of the compensation volume V0 of the pressure difference compensator (5) is: V0=V1+V2 Wherein, V1 is the volume compression of the oil inside the hydraulic cavity (11); V1=β W ×V×(P-P0) Among them, β W is the liquid compressibility coefficient, MPa-1; the ambient temperature is 20℃, take β W =0.0006MPa -1 ; V is the initial volume of the oil, m 3 ; P is the maximum external environmental pressure, MPa; P0 is atmospheric pressure, the value is P0 = 0.1 MPa; V2 is the volume change caused by the change in the oil temperature inside the hydraulic cavity (11); V2=V×β×(T2-T1) Wherein, β is the average volume expansion coefficient when the temperature rises from T1 to T2, which is 0.00065 / °C.

8. The integrated deep-sea hydraulic control valve box according to claim 1, characterized in that: The valve block (3) further comprises a mounting side surface (32) located beside the mounting end surface (31), the mounting side surface (32) of the valve block (3) further comprising an internal thread interface (33) and an output hydraulic oil circuit interface (34) for the electromagnetic control valve (41), the integrated valve group (4) further comprising a regulating valve (42) threadedly connected to the internal thread interface (33), the regulating valve (42) comprising a speed regulating valve and / or a pressure regulating valve; The valve block (3) is also provided with an oil filling valve (43) for filling the hydraulic chamber (11) with oil, and the box cover (2) is provided with an air release valve (21) for exhausting the air when the hydraulic chamber (11) is filled with oil; The box cover (2) is also provided with an explosion-proof valve (22) having a designed opening pressure of 0.6 bar. The explosion-proof valve is used to automatically open and release pressure when the oil pressure in the box body changes due to changes in the external ambient temperature or an increase in the amount of oil caused by leakage of the hydraulic valve on the integrated valve group, which affects the structural safety of the box body.

9. The integrated deep-sea hydraulic control valve box according to claim 1, characterized in that: A watertight socket (13) is also installed on the side of the box body (1), and an electric signal cable is arranged on the watertight socket (13). The electric signal cable connects the control line of the electromagnetic control valve (41) and is connected to the watertight socket (13) through an external watertight cable to control the operation of the electromagnetic control valve (41); The mounting end surface (31) of the valve block (3) is also provided with a water leakage alarm (35) for sending out an alarm signal when external seawater leaks into the hydraulic chamber (11).

10. The integrated deep-sea hydraulic control valve box according to claim 1, characterized in that: The box cover (2) is made of transparent material, a first sealing ring (23) is installed between the box cover (2) and the box body (1), and a second sealing ring (24) is installed between the box body (1) and the mounting end surface (31) of the valve block (3).

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