Threaded plug-in type deep sea proportional overflow valve
By designing a threaded cartridge deep-sea proportional relief valve, and utilizing the synergistic effect of the pilot valve and proportional electromagnet assembly, combined with a multi-stage valve sleeve and stepped cavity structure, the sealing and adjustment accuracy problems of traditional relief valves in deep-sea environments are solved. This achieves stable control of the hydraulic system, miniaturization of the equipment, and reduced maintenance costs.
Patent Information
- Application Number
- CN202511928411.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-02-03
AI Technical Summary
Traditional relief valves are prone to sealing performance issues in high-pressure, low-temperature, and highly corrosive deep-sea environments, making it difficult to accurately maintain system pressure. They also have limited pressure regulation accuracy, large size and weight, which hinders the miniaturization and lightweighting of deep-sea equipment. Furthermore, they suffer from poor durability and reliability, and frequent maintenance costs.
A threaded cartridge deep-sea proportional relief valve was designed. The opening conditions of the pilot valve are determined by the preload of the pilot valve spring and the electromagnetic force generated by the proportional electromagnet assembly, thereby realizing the opening and closing of the main valve core. Combined with a multi-segment valve sleeve and a stepped cavity structure, sealing performance and stability are ensured. The proportional electromagnet assembly is used for precise pressure regulation.
It achieves constant pressure overflow and pressure stabilization control of the hydraulic system, improves the control accuracy and working performance of deep-sea operation equipment, adapts to the harsh deep-sea environment, simplifies installation and maintenance, and reduces maintenance costs.
Smart Images
Figure CN121452235A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of hydraulic control elements, in particular to a threaded plug-in type deep-sea proportional relief valve. BACKGROUND
[0002] In the fields of deep-sea resource development and marine scientific research, the hydraulic system of equipment is crucial, and precise pressure control is needed to ensure the stable operation and safety of various underwater operating equipment.
[0003] Traditional relief valves cannot meet the requirements of deep-sea complex working conditions. The sealing performance of ordinary relief valves is easily affected in deep-sea high-pressure, low-temperature, and strong corrosion environments, leading to leakage and inaccurate maintenance of system pressure. Moreover, the pressure regulation accuracy is limited, making it difficult to meet the demand for fine control of pressure by deep-sea operating equipment, such as deep-sea mining equipment, which needs to accurately adjust the pressure to ensure mining efficiency and equipment safety under different geological conditions.
[0004] In addition, the structural design of conventional relief valves makes them large in size and weight, which is not conducive to the miniaturization and lightweight design of deep-sea equipment, increasing the load and energy consumption of underwater equipment. At the same time, in the harsh deep-sea environment, its reliability and durability are poor, frequent maintenance and replacement not only cost high, but also seriously affect the operation progress. To solve the above problems, the present application provides a threaded plug-in type deep-sea proportional relief valve. SUMMARY
[0005] In view of the deficiencies of the prior art, the present application provides a threaded plug-in type deep-sea proportional relief valve to solve the problems raised in the background art.
[0006] The above technical purpose of the present application is achieved by the following technical scheme: A threaded plug-in type deep-sea proportional relief valve, comprising: a valve body, an inner part of the valve body is provided with a valve sleeve, an inner part of the valve sleeve is provided with a main valve core, an inner part of the valve sleeve is provided with a valve seat, a main valve spring is arranged between the valve seat and the main valve core, an inner part of the valve body is provided with a pressure regulating rod, an inner part of the valve body is provided with a pilot valve spring, the pilot valve spring is located between the valve seat and the pressure regulating rod, pilot valve spring seats and steel balls are symmetrically arranged at both ends of the pilot valve spring, and a proportional electromagnet assembly is arranged in the inner part of the valve body.
[0007] By adopting the above technical scheme, the opening condition of the pilot valve is determined by the pre-tightening force of the pilot valve spring and the electromagnetic force generated by the proportional electromagnet assembly, thereby forming a pressure difference on both sides of the main valve core after the pilot valve is opened, realizing the opening and closing of the main valve core, and enabling the relief valve to adjust the opening pressure in proportion, completing the functions of constant pressure relief and pressure stabilization control.
[0008] Preferably, the outer surface of the valve sleeve is sequentially the first section of cylinder, the first section of cylinder groove, the second section of cylinder, the second section of cylinder groove (the two ends are tapered surface), the third section of cylinder, the third section of semicircular arc groove, the fourth section of cylinder from right to left, the four sections of cylinder of the valve sleeve are equal in diameter, the diameter of the second section of cylinder groove is greater than that of the first section of cylinder groove, the first section of cylinder groove is provided with a check ring and a first sealing ring, a row of oil outlets is uniformly distributed along the circumference of the second section of cylinder groove, the axis direction of the oil outlet coincides with the radial direction of the second section of cylinder groove, the third section of semicircular arc groove is used for installing a steel wire check ring when the valve sleeve is assembled with the valve body, and the internal features of the valve sleeve are sequentially the chamfer, the inner end face and the cylindrical surface of the valve sleeve from left to right.
[0009] By adopting the technical scheme, the reliable positioning and sealing installation of the valve sleeve in the valve body can be realized through the multi-section outer shape of the valve sleeve and the corresponding groove part, the overall structural design not only improves the assembly reliability between the valve sleeve and the valve body, but also provides a stable geometric basis for the guiding movement of the main valve core, thereby enhancing the working stability and deep-sea environmental adaptability of the entire overflow valve.
[0010] Preferably, the inner cavity of the main valve core is a stepped cavity with increasing diameters from right to left, oil flows in the stepped cavity, the stepped cavity is sequentially the main valve core front cavity, the main valve core damping hole, the main valve core middle cavity and the main valve core rear cavity, the main valve spring is located in the main valve core rear cavity, the main valve core front cavity is sequentially a conical cavity-cylindrical cavity-conical cavity structure from outside to inside, and the cavity is communicated with the main valve core middle cavity through the main valve core damping hole, the main body of the main valve core is a stepped cylinder, the outer cylindrical surface of the main valve core is matched with the inner cavity of the valve sleeve to achieve a gap sealing effect, a plurality of annular grooves are formed in the outer cylindrical surface to eliminate the radial unbalanced force between the valve sleeve and the main valve core, so that the two are coaxially matched, the stepped cylindrical surface of the main valve core serves as a liquid dynamic force check ring for balancing the liquid dynamic force, the outer round corner is processed on the front end face of the main valve core, and the stepped end face of the main valve core is matched with the inner end face to facilitate installation and reduce the risk of jamming.
[0011] By adopting the technical scheme, the oil can form a stable hierarchical flow among the front cavity, the middle cavity and the rear cavity through the stepped cavity structure of the main valve core, effectively reducing the internal pressure mutation, and the main valve core damping hole forms a controlled throttling between the front cavity and the middle cavity, so that the pressure difference on both sides of the main valve core is more easily established and maintained stable, thereby improving the responsiveness and controllability of the main valve core action, the annular groove on the outer cylindrical surface of the main valve core can improve the pressure distribution of the outer surface of the valve core, reduce the liquid dynamic force bias load, and reduce the risk of jamming, the stepped cylindrical surface further inhibits the influence of uneven liquid dynamic force on the movement of the main valve core as a liquid dynamic force balance structure, and the outer fillet structure at the front end of the main valve core is beneficial to improve the liquid flow state entering the front cavity and reduce the flow impact, and the overall structure can ensure that the main valve core still maintains stable and smooth opening and closing characteristics in the deep sea high pressure environment, and improves the proportional regulation accuracy and working reliability of the overflow valve.
[0012] Preferably, the outer surface of the valve seat is sequentially the end face of the valve seat, the cylindrical groove and the damping hole from right to left, the end face coincides with the end face of the main valve spring, the cylindrical groove is provided with a second sealing ring, and the damping hole allows oil to reach the pilot valve.
[0013] By adopting the technical scheme, the main valve spring is ensured to be stably positioned in the axial direction, the second sealing ring is arranged in the cylindrical groove on the outer side of the valve seat, reliable sealing can be formed between the valve seat and the valve sleeve, high-pressure oil leakage along the outer periphery of the valve seat is prevented, the damping hole on the valve seat serves as a throttling channel of the pilot oil path, a controlled pressure difference is formed when the pilot valve is opened, the pilot flow is more stable, and the opening action of the main valve core is smooth and controlled, and the valve seat has good sealing, supporting and throttling functions through the structural design, thereby effectively improving the stability of the pilot control and the working reliability of the entire proportional overflow valve.
[0014] Preferably, the left and right sides of the pilot valve spring are provided with a pilot valve spring seat, the circular table of the pilot valve spring seat coincides with the end face of the pilot valve spring, a steel ball is press-fitted in the inside of the pilot valve spring seat, and the steel ball on the right side cooperates with the damping hole of the valve seat.
[0015] By adopting the technical scheme, the pilot valve spring is reliably supported and positioned, and is kept stable in the axial stress direction, the steel ball press-fitted in the inside of the pilot valve spring seat constitutes a pilot valve core, the steel ball on the right side is accurately matched with the damping hole on the valve seat to form a pilot throttling channel, and the pilot flow channel can be opened or closed in response to the change of system pressure, the above structure enables the pilot valve to have good sealing and rapid response capability, thereby ensuring the stability of the pilot pressure regulation and providing a reliable pilot control basis for the controlled action of the main valve core.
[0016] Preferably, the right side of the pressure regulating rod is provided with a tapered surface, and the outer surface of the pressure regulating rod is sequentially provided with a cylindrical groove, a cylindrical surface and an end surface from right to left.
[0017] By adopting the above technical scheme, the sensitivity of the opening pressure of the pilot valve core can be adjusted when the proportional electromagnet assembly applies electromagnetic force, the cylindrical groove on the outer side of the pressure regulating rod is used to install the pressure regulating sealing ring and the pressure regulating blocking ring, reliable sealing can be formed at the cooperation part of the pressure regulating rod and the valve body, and the axial movement of the pressure regulating rod can be prevented, the cylindrical surface cooperates with the corresponding cylindrical surface in the valve body to ensure the stable guidance of the pressure regulating rod in the axial direction, and the above structure together ensures that the pressure regulating rod has a stable force transmission path and good sealing performance, so that the pilot pressure regulating process is more accurate and reliable.
[0018] Preferably, the outer surface of the valve body is sequentially provided with a steel wire blocking ring mounting port and an external thread from right to left, an arc-shaped groove penetrating the external thread is arranged on the external thread, the oil flows to the outside of the oil outlet port of the valve sleeve after the pilot valve is opened to form a pressure difference, and then the main valve core is opened, a damping hole, a sealing ring mounting groove and a hexagonal prism are arranged on the arc-shaped groove, and the inner cavity of the valve body is sequentially provided with two cylindrical surfaces, a semicircular arc groove, three cylindrical cavities, a shoulder, an internal thread and a mounting cylindrical surface from right to left, the cylindrical surface cooperates with the valve sleeve, the semicircular arc groove cooperates with the steel wire blocking ring, the cylindrical cavities are used for assembling the pilot valve spring seat, the cylindrical surface cooperates with the pressure regulating rod, the cylindrical surface cooperates with the shoulder, and the sealing ring mounting groove is sleeved with a third sealing ring.
[0019] By adopting the above technical scheme, the proportional overflow valve is connected to the hydraulic system through the external thread, the arc-shaped groove facilitates the flow of oil, the damping hole can generate a pressure difference to control the overflow of the main valve core, stabilize the action of the main valve core, control the oil flow, and ensure the stability of the system pressure, and the third sealing ring is installed in the sealing ring mounting groove to prevent oil leakage.
[0020] Preferably, the main body of the proportional electromagnet assembly is block-shaped, the proportional electromagnet assembly further comprises a sleeve, an armature core, a sleeve piston, a sleeve plug and an oil passage, the oil passage is used for oil communication between the cavity between the sleeve piston and the armature core and an oil tank to realize pressure compensation, the end surface of the main body of the proportional electromagnet assembly is an armature sleeve, the armature sleeve extends by a section provided with an external thread, an armature top rod and a fourth sealing ring, the external thread is threadedly connected with the internal thread, and the outer end surface of the armature top rod coincides with the end surface.
[0021] By adopting the above technical scheme, the electromagnetic force output by the proportional electromagnet assembly drives the up-down action of the armature top rod to adjust the pressure.
[0022] In summary, the present application mainly has the following beneficial effects: 1、 the threaded plug-in type deep-sea proportional relief valve of the present application, through simple and reasonable structure design, realizes the constant pressure relief, pressure stabilization, system unloading and safety protection function of the hydraulic system, can accurately and stably overflow pressure regulation, effectively improves the working performance and reliability of the hydraulic system in deep-sea environment, adapts to the harsh requirements of deep-sea operation.
[0023] The threaded plug-in type deep-sea proportional relief valve of the present application, through effective sealing assembly and structure design, the pressure compensation design of proportional electromagnet assembly makes it can effectively resist deep-sea high pressure.
[0024] The threaded plug-in type deep-sea proportional relief valve of the present application, with the help of high-precision proportional electromagnet, can accurately adjust the hydraulic system pressure according to the actual working condition demand, improve the control accuracy and working performance of deep-sea operation equipment hydraulic system.
[0025] The threaded plug-in type deep-sea proportional relief valve of the present application adopts threaded plug-in type structure, which is convenient for quick installation and disassembly in deep-sea hydraulic system, is beneficial to equipment maintenance and repair, saves installation time and labor cost. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is the structure schematic diagram of the threaded plug-in type deep-sea proportional relief valve of the present application; Figure 2 is the half sectional view of the valve sleeve 1 of the present application; Figure 3 is the half sectional view of the main valve core 4 of the present application; Figure 4 is the half sectional view of the valve seat 8 of the present application; Figure 5 is the structure schematic diagram of the pilot valve spring 11 of the present application; Figure 6 is the half sectional view of the pressure regulating rod 14 of the present application; Figure 7 is the half sectional view of the valve body 15 of the present application; Figure 8 is the half sectional view of the proportional electromagnet assembly 16 of the present application; Figure 9 is the pressure compensation principle diagram of deep-sea oil hydraulic pressure.
[0027] Reference: 1, valve sleeve; 1.1, first section cylinder; 1.2, first section cylinder groove; 1.3, second section cylinder; 1.4, second section cylinder groove; 1.5, third section cylinder; 1.6, third section semicircular arc groove; 1.7 fourth section cylinder; 1.8, oil outlet; 1.9, chamfer; 1.10, inner end face; 1.11, cylindrical surface; 2, check ring; 3, first sealing ring; 4, main valve core; 4.1, main valve core front cavity; 4.2, main valve core damping hole; 4.3, main valve core middle cavity; 4.4, main valve core rear cavity; 4.5, outer cylindrical surface; 4.6, annular groove; 4.7, stepped cylindrical surface; 4.8, round corner; 4.9, stepped end face; 5, main valve spring; 6, steel wire check ring; 7, second sealing ring; 8, valve seat; 8.1, cylindrical groove; 8.2, damping hole; 8.3, end face; 9, steel ball; 10, pilot valve spring seat; 11, pilot valve spring; 12, pressure regulating sealing ring; 13, pressure regulating check ring; 14, pressure regulating rod; 14.1, tapered surface; 14.2, cylindrical groove; 14.3, cylindrical surface; 14.4 end face; 15, valve body; 15.1, steel wire check ring mounting port; 15.2, external thread; 15.3, arc groove; 15.4, damping hole; 15.5, sealing ring mounting groove; 15.6, hexagonal prism; 15.7, cylindrical surface; 15.8, semicircular arc groove; 15.9, cylindrical surface; 15.10, cylindrical cavity; 15.11, cylindrical cavity; 15.12, cylindrical cavity; 15.13, shoulder; 15.14, internal thread; 15.15, mounting cylindrical surface; 16, proportional solenoid assembly; 16.1, armature sleeve; 16.2, external thread; 16.3, armature top rod; 16.4, fourth sealing ring; 16.5, sleeve; 16.6, armature core; 16.7, sleeve piston; 16.8, sleeve plug; 17, third sealing ring. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort fall within the protection scope of the present application.
[0029] The following examples are used to illustrate the present application, but cannot be used to limit the protection scope of the present application. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements of the method of the present application under the concept of the present application also fall within the protection scope of the present application.
[0030] Reference Figures 1-8The utility model provides a threaded plug -in type deep sea proportional overflow valve, it includes: the valve body 15, the inside of valve body 15 is provided with valve sleeve 1, the inside of valve sleeve 1 is provided with main valve core 4, the inside of valve sleeve 1 is provided with valve seat 8, and main valve core 4 is provided with main valve spring 5 between valve seat 8, the inside of valve body 15 is provided with pressure regulating rod 14, the inside of valve body 15 is provided with pilot valve spring 11, pilot valve spring 11 is located between valve seat 8 and pressure regulating rod 14, pilot valve spring 11 both ends are symmetrically arranged with pilot valve spring seat 10 and steel ball 9, the inside of valve body 15 is provided with proportional solenoid assembly 16, and the opening condition of pilot valve is determined by the pre-tightening force of pilot valve spring 11 and the electromagnetic force of proportional solenoid assembly 16, to form pressure difference on both sides of main valve core 4 after the opening of pilot valve, realize the opening and closing of main valve core 4, make overflow valve can be adjusted opening pressure proportionally, complete constant pressure overflow and pressure stabilizing control function, the outer surface of valve sleeve 1 is from right to left in proper order first section cylinder 1.1 of valve sleeve 1, first section cylinder groove 1.2, second section cylinder 1.3, second section cylinder groove 1.4 (both ends are taper), third section cylinder 1.5, third section semicircular arc groove 1.6, fourth section cylinder 1.7, the diameter of four section cylinders of valve sleeve 1 is equal, and the diameter of second section cylinder groove 1.4 is greater than the diameter of first section cylinder groove 1.2, first section cylinder groove 1.2 is provided with baffle ring 2 and first sealing ring 3, a row of oil outlets 1.8 is evenly distributed on second section cylinder groove 1.4 along the circumference, the axis direction of oil outlet 1.8 coincides with the radial direction of second section cylinder groove 1.4, third section semicircular arc groove 1.6 is used to install steel wire baffle ring 6 when valve sleeve 1 and valve body 15 are assembled, the inside features of valve sleeve 1 are in order from left to right as follows: chamfer 1.9 of valve sleeve 1, inner end face 1.10, cylindrical surface 1.11, chamfer 1.9 facilitates the assembly of valve seat 8, reliable positioning and sealing installation of valve sleeve 1 in valve body 15 can be realized through the multi-section appearance of valve sleeve 1 and the corresponding groove part, the overall structural design not only improves the assembly reliability between valve sleeve 1 and valve body 15, but also provides a stable geometric basis for the guided movement of main valve core 4, thereby enhancing the working stability and deep sea environmental adaptability of the entire overflow valve.
[0031] Reference Figures 1-8The inner cavity of the main valve core 4 is a stepped cavity with increasing diameters from right to left, and the oil flows in the stepped cavity. The stepped cavity includes a main valve core front cavity 4.1, a main valve core damping hole 4.2, a main valve core middle cavity 4.3, and a main valve core rear cavity 4.4 in sequence. The main valve spring 5 is located in the main valve core rear cavity 4.4. The main valve core front cavity 4.1 has a structure of a conical cavity-cylindrical cavity-conical cavity from outside to inside in sequence, and the cavity is communicated with the main valve core middle cavity 4.3 through the main valve core damping hole 4.2. The main body of the main valve core 4 is a stepped cylinder. The outer cylindrical surface 4.5 of the main valve core 4 is matched with the inner cavity of the valve sleeve 1 to achieve a gap sealing effect. A plurality of annular grooves 4.6 are formed on the outer cylindrical surface 4.5 to eliminate the radial unbalanced force between the valve sleeve 1 and the main valve core 4, so that the valve sleeve 1 and the main valve core 4 are coaxially matched. The stepped cylindrical surface 4.7 of the main valve core 4 is used as a liquid dynamic force blocking ring to balance the liquid dynamic force. The outer round corner 4.8 is formed on the front end surface of the main valve core 4. The stepped end surface 4.9 of the main valve core 4 is matched with the inner end surface 1.10 to facilitate installation and reduce the risk of jamming. Through the stepped cavity structure of the main valve core 4, the oil can form a smooth staged flow between the front cavity, the middle cavity, and the rear cavity, effectively reducing the pressure mutation in the cavity. At the same time, the main valve core 4 damping hole 4.2 forms a controlled throttling between the front cavity and the middle cavity, so that the pressure difference on both sides of the main valve core 4 is more easily established and maintained stable, thereby improving the responsiveness and controllability of the main valve core 4 action. The annular grooves 4.6 on the outer cylindrical surface 4.5 of the main valve core 4 can improve the pressure distribution on the outer surface of the valve core, reduce the liquid dynamic force bias, and reduce the risk of jamming. The stepped cylindrical surface 4.7 as a liquid dynamic force balancing structure further suppresses the influence of uneven liquid dynamic force on the movement of the main valve core 4. The outer round corner structure of the front end of the main valve core 4 is beneficial to improve the liquid flow state entering the front cavity and reduce the flow impact. The overall structure can ensure that the main valve core 4 still maintains stable and smooth opening and closing characteristics in the deep-sea high-pressure environment, improves the proportional regulation accuracy and working reliability of the overflow valve. The outer surface of the valve seat 8 from right to left is the end surface 8.3, the cylindrical groove 8.1, and the damping hole 8.2 in sequence. The end surface 8.3 is coincided with the end surface of the main valve spring 5. The cylindrical groove 8.1 is provided with the second sealing ring 7. The damping hole 8.2 makes the oil reach the pilot valve to ensure the stable positioning of the main valve spring 5 in the axial direction. The second sealing ring 7 is arranged in the cylindrical groove 8.1 on the outer side of the valve seat to form a reliable seal between the valve seat 8 and the valve sleeve 1, preventing high-pressure oil from leaking along the outer periphery of the valve seat. The damping hole 8.2 on the valve seat 8 is used as a throttling passage of the pilot oil way to form a controlled pressure difference when the pilot valve is opened, so that the pilot flow is more stable, thereby ensuring that the opening action of the main valve core 4 is smooth and controlled. Through the structure design, the valve seat 8 has good sealing, supporting, and throttling functions, effectively improving the stability of the pilot control and the working reliability of the entire proportional overflow valve.
[0032] Reference Figures 1-8The left and right sides of the pilot valve spring 11 are provided with pilot valve spring seats 10, the circular table of the pilot valve spring seat 10 coincides with the end surface of the pilot valve spring 11, the inside of the pilot valve spring seat 10 is press-fitted with a steel ball 9, the right side steel ball 9 cooperates with the damping hole 8.2 of the valve seat 8, which is used for reliable support and positioning of the pilot valve spring 11, and keeps it stable in the axial stress direction, the steel ball 9 press-fitted in the inside of the pilot valve spring seat 10 constitutes the pilot spool, and the right side steel ball 9 cooperates with the damping hole 8.2 on the valve seat 8 to form a pilot throttling channel, which can respond sensitively and open or close the pilot flow passage when the system pressure changes. The above structure makes the pilot valve have good sealing performance and rapid response capability, thereby ensuring the stability of the pilot pressure regulation and providing a reliable pilot control basis for the controlled action of the main spool 4. The right side of the pressure regulating rod 14 is provided with a tapered surface 14.1, the outer surface of the pressure regulating rod 14 is sequentially provided with a cylindrical groove 14.2, a cylindrical surface 14.3 and an end surface 14.4 from right to left, the tapered surface 14.1 cooperates with the left side steel ball 9, the cylindrical groove 14.2 is used for sleeving the pressure regulating sealing ring 12 and the pressure regulating stop ring 13 of the pressure regulating rod 14, which is used for sensitive adjustment of the opening pressure of the pilot spool when the proportional solenoid assembly applies electromagnetic force, the cylindrical groove 14.2 on the outer side of the pressure regulating rod is used for installing the pressure regulating sealing ring 12 and the pressure regulating stop ring 13, which can form reliable sealing at the cooperation position of the pressure regulating rod 14 and the valve body and prevent axial movement of the pressure regulating rod, the cylindrical surface 14.3 cooperates with the corresponding cylindrical surface in the valve body to ensure stable axial guidance of the pressure regulating rod, and the above structure together ensures stable stress transmission path and good sealing performance of the pressure regulating rod, so that the pilot pressure regulation process is more accurate and reliable.
[0033] Reference Figures 1-8The outer surface of the valve body 15 is provided with a steel wire retainer ring mounting port 15.1, an external thread 15.2, an arc-shaped slot 15.3 penetrating the external thread 15.2, a damping hole 15.4, a sealing ring mounting groove 15.5, and a hexagonal prism 15.6 from right to left. The inner cavity of the valve body 15 is provided with two cylindrical surfaces 15.7 and 15.9, a semicircular arc groove 15.8, three cylindrical cavities 15.10, 15.11, and 15.12, a shoulder 15.13, an internal thread 15.14, and a mounting cylindrical surface 15.15 from right to left. The cylindrical surfaces 15.7 and 15.9 are matched with the valve sleeve 1, the semicircular arc groove 15.8 is matched with the steel wire retainer ring 6, the cylindrical cavities 15.10 and 15.11 are used for assembling the pilot valve spring seat 10, the cylindrical surface 15.12 is matched with the pressure regulating rod 14, the cylindrical surface 14.3 is matched with the shoulder 15.13, the sealing ring mounting groove 15.5 is provided with a third sealing ring 17, the proportional overflow valve is connected to the hydraulic system through the external thread 15.2, the arc-shaped slot 15.3 is used for oil flow, the damping hole 15.4 can generate a pressure difference to control the opening of the main valve core 4, stabilize the action of the main valve core 4, control the oil flow, and ensure the stability of the system pressure, the third sealing ring 17 is installed in the sealing ring mounting groove 15.5 to prevent oil leakage, the main body of the proportional electromagnet assembly 16 is block-shaped, and the proportional electromagnet assembly 16 further includes a sleeve 16.5, an armature core 16.6, a sleeve piston 16.7, a sleeve plug 16.8, and an oil passage for connecting the cavity between the sleeve piston 16.7 and the armature core 16.6 to the oil tank to realize pressure compensation. The end surface of the main body of the proportional electromagnet assembly 16 is an armature sleeve 16.1, which extends outwardly and is provided with an external thread 16.2, an armature top rod 16.3, and a fourth sealing ring 16.4. The external thread 16.2 is threadedly connected with the internal thread 15.14, the outer end surface of the armature top rod 16.3 coincides with the end surface 14.4, and the electromagnetic force output by the proportional electromagnet assembly 16 drives the armature top rod 16.3 to move up and down to adjust the pressure.
[0034] Reference Figure 9 The application also provides a pressure compensation principle of the threaded plug-in type deep-sea proportional overflow valve, and the specific steps are as follows: The pressure inside the oil tank is equal to the pressure of seawater environment by pressure compensation, and the maximum pressure can reach 120 MPa (the pressure of seawater increases by 1 MPa when the depth of seawater increases by 100 m, and the pressure of seawater is about 120 MPa when the depth of seawater is 12000 m), the hydraulic oil in the oil tank is introduced into the space outside the sleeve 16.5 through the oil hole, so that the pressure in the space is equal to the pressure in the oil tank (ambient pressure), at this time, the inner and outer surfaces of the proportional solenoid assembly 16 are equal in pressure, each copper wire in the coil only bears the positive pressure of the oil, and each surface of the coil skeleton also only bears the positive pressure of the oil; the outside of the sleeve 16.5 is the ambient pressure (such as 120 MPa), and the inside is the working medium pressure (such as 155 MPa), and the pressure difference is 35 MPa, which is similar to the land working condition.
[0035] After compensation, the outlet pressure of the overflow valve is equal to the pressure in the oil tank (such as 120 MPa), the internal pressure of the valve is still the working medium pressure (such as 155 MPa), and the maximum pressure difference is still 35 MPa. In this way, the situation that any part of the overflow valve appears a pressure difference of 120 MPa or more can be avoided, the pressure difference at any position is ensured to be less than 35 MPa, so that the normal operation of the overflow valve is ensured.
[0036] Working principle: please refer to Figures 1-9 The valve sleeve 1 cooperates with the valve body 15, and the first sealing ring 3, the second sealing ring 7 and the third sealing ring 17 are adopted to ensure deep-sea sealing, the proportional solenoid assembly 16 can adjust the opening pressure of the pilot valve in proportion, so as to control the opening of the oil outlet 1.8 of the main valve core 4, realize pressure regulation, and when the system pressure is lower than the sum of the pre-tightening force and the electromagnetic force of the pilot valve spring 11, the main valve core 4 is closed, when the system pressure increases and exceeds the set value, the pilot valve is opened, so that the oil passes through the damping hole 8.2 of the valve seat 8 and the damping hole 4.2 of the main valve core 4 to form a pressure difference, and the main valve core 4 is pushed to open, so as to realize overflow and pressure stabilization, the stepped cavity 4.1-4.4, the outer cylindrical surface 4.5 and the annular groove 4.6 of the main valve core 4 can reduce the steady-state hydraulic power and improve the smoothness of action, and the threaded plug-in structure is convenient for installation and maintenance, so that it can better adapt to the deep-sea working environment.
[0037] Although the embodiments of present application have been shown and described, it is to be understood that for the purpose of the present application, the technical and scientific terms used have the meanings commonly understood by a person of ordinary skill in the art, unless otherwise defined. The terms "comprising" or "including" or similar words used herein specify the presence of stated elements or integers but do not preclude the presence or addition of one or more other elements or integers. The term "connected" or "coupled" or similar words used herein refer to both physical or mechanical and electrical connections or couplings, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to express relative positions such that when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly.
[0038] Although the embodiments of present application have been shown and described, it is to be understood that for the purpose of the present application, the technical and scientific terms used have the meanings commonly understood by a person of ordinary skill in the art, unless otherwise defined. The terms "comprising" or "including" or similar words used herein specify the presence of stated elements or integers but do not preclude the presence or addition of one or more other elements or integers. The term "connected" or "coupled" or similar words used herein refer to both physical or mechanical and electrical connections or couplings, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to express relative positions such that when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly.
Claims
1. A threaded cartridge-type deep-sea proportional relief valve, characterized in that, include: The valve body (15) has a valve sleeve (1) inside, a main valve core (4) inside the valve sleeve (1), a valve seat (8) inside the valve sleeve (1), a main valve spring (5) between the valve seat (8) and the main valve core (4), a pressure regulating rod (14) inside the valve body (15), a pilot valve spring (11) inside the valve body (15), the pilot valve spring (11) is located between the valve seat (8) and the pressure regulating rod (14), a pilot valve spring seat (10) and a steel ball (9) are symmetrically arranged at both ends of the pilot valve spring (11), and a proportional electromagnet assembly (16) is provided inside the valve body (15).
2. A threaded cartridge-type deep-sea proportional relief valve according to claim 1, characterized in that, The outer surface of the valve sleeve (1) consists of, from right to left, a first cylindrical section (1.1), a first cylindrical groove (1.2), a second cylindrical section (1.3), a second cylindrical groove (1.4) (with conical ends), a third cylindrical section (1.5), a third semi-circular groove (1.6), and a fourth cylindrical section (1.7). The four cylindrical sections of the valve sleeve (1) have equal diameters. The diameter of the second cylindrical groove (1.4) is larger than that of the first cylindrical groove (1.2). The first cylindrical groove (1.2) contains a retaining ring (2) and a first seal. The second cylindrical groove (1.4) has an oil outlet (1.8) evenly distributed along its circumference. The axial direction of the oil outlet (1.8) coincides with the radial direction of the second cylindrical groove (1.4). The third semi-circular groove (1.6) is used to install a wire retaining ring (6) when assembling the valve sleeve (1) and the valve body (15). The internal features of the valve sleeve (1) from left to right are the chamfer (1.9), inner end face (1.10), and cylindrical surface (1.11). The chamfer (1.9) facilitates the assembly of the valve seat (8).
3. A threaded cartridge-type deep-sea proportional relief valve according to claim 2, characterized in that, The inner cavity of the main valve core (4) is a stepped cavity with an increasing diameter from right to left. Oil flows within the stepped cavity. The stepped cavity consists of the main valve core front cavity (4.1), the main valve core damping hole (4.2), the main valve core middle cavity (4.3), and the main valve core rear cavity (4.4). The main valve spring (5) is located within the main valve core rear cavity (4.4). The main valve core front cavity (4.1) has a structure of conical cavity-cylindrical cavity-conical cavity from the outside to the inside, and this cavity is connected to the main valve core middle cavity (4.3) through the main valve core damping hole (4.2). The main valve core (4) is a stepped cylinder. The outer cylindrical surface (4.5) of the main valve core (4) is fitted with the inner cavity of the valve sleeve (1) to achieve a gap sealing effect. Multiple annular grooves (4.6) are provided on the outer cylindrical surface (4.5) to eliminate the radial unbalanced force between the valve sleeve (1) and the main valve core (4) and make the two achieve coaxial fit. The stepped cylindrical surface (4.7) of the main valve core (4) serves as a hydraulic retaining ring to balance the hydraulic force. The front end face of the main valve core (4) is treated with an outer rounded corner (4.8). The stepped end face (4.9) of the main valve core (4) fits with the inner end face (1.10) to facilitate installation and reduce the risk of jamming.
4. A threaded cartridge-type deep-sea proportional relief valve according to claim 3, characterized in that, The outer surface of the valve seat (8) consists of the end face (8.3), cylindrical groove (8.1), and damping hole (8.2) of the valve seat (8) from right to left. The end face (8.3) coincides with the end face of the main valve spring (5). The cylindrical groove (8.1) is provided with a second sealing ring (7). The damping hole (8.2) allows the oil to reach the pilot valve.
5. A threaded cartridge-type deep-sea proportional relief valve according to claim 4, characterized in that, Pilot valve spring seats (10) are provided on both the left and right sides of the pilot valve spring (11). The frustum of the pilot valve spring seat (10) coincides with the end face of the pilot valve spring (11). A steel ball (9) is press-fitted inside the pilot valve spring seat (10). The steel ball (9) located on the right side cooperates with the damping hole (8.2) of the valve seat (8).
6. A threaded cartridge-type deep-sea proportional relief valve according to claim 5, characterized in that, The right side of the pressure regulating rod (14) is provided with a conical surface (14.1). The outer surface of the pressure regulating rod (14) from right to left is the cylindrical groove (14.2), cylindrical surface (14.3), and end face (14.4) of the pressure regulating rod (14). The conical surface (14.1) cooperates with the steel ball (9) located on the left side. The cylindrical groove (14.2) is used to fit the pressure regulating sealing ring (12) and the pressure regulating retaining ring (13) of the pressure regulating rod (14).
7. A threaded cartridge-type deep-sea proportional relief valve according to claim 6, characterized in that, The outer surface of the valve body (15) from right to left consists of a wire retaining ring mounting port (15.1) and an external thread (15.2). The external thread (15.2) has an arc-shaped groove (15.3) with a through thread. After the pilot valve is opened, the oil flows to the outside of the oil outlet (1.8) of the valve sleeve (1) to form a pressure difference, which then opens the main valve core (4). The arc-shaped groove (15.3) has a damping hole (15.4), a sealing ring mounting groove (15.5), and a hexagonal prism (15.6). The inner cavity of the valve body (15) from right to left consists of two cylindrical surfaces (15.7, 15.9) and a semi-circular arc groove (15.8). The valve has three cylindrical cavities (15.10, 15.11, 15.12), a shoulder (15.13), an internal thread (15.14), and a mounting cylindrical surface (15.15). The cylindrical surfaces (15.7, 15.9) mate with the valve sleeve (1). The semi-circular groove (15.8) mates with the wire retaining ring (6). The cylindrical cavities (15.10) and (15.11) are used to assemble the pilot valve spring seat (10). The cylindrical surface (15.12) mates with the pressure adjusting rod (14). The cylindrical surface (14.3) mates with the shoulder (15.13). A third sealing ring (17) is fitted inside the sealing ring mounting groove (15.5).
8. A threaded cartridge-type deep-sea proportional relief valve according to claim 7, characterized in that, The main body of the proportional electromagnet assembly (16) is block-shaped. The proportional electromagnet assembly (16) also includes a sleeve (16.5), an armature core (16.6), a sleeve piston (16.7), a sleeve plug (16.8), and an oil passage hole. The oil passage hole is used to allow oil to flow between the cavity between the sleeve piston (16.7) and the armature core (16.6) and the oil tank to achieve pressure compensation. The end face of the main body of the proportional electromagnet assembly (16) is an armature sleeve (16.1). The armature sleeve (16.1) extends out a section with an external thread (16.2), an armature push rod (16.3), and a fourth sealing ring (16.4). The external thread (16.2) is threadedly connected to the internal thread (15.14). The outer end face of the armature push rod (16.3) coincides with the end face (14.4).