A hydraulically controlled one-way valve with variable pilot ratio

Abstract

The present invention discloses a hydraulically controlled one-way valve with a variable pilot ratio, which belongs to the technical field of control valves. The valve body, valve sleeve, valve core and regulating assembly are included. The valve sleeve is threadedly installed on one end of the valve body, the regulating assembly is arranged in the valve body, the valve sleeve is provided with an oil inlet, an oil outlet, a first chamber and a second chamber, a third chamber is formed between the regulating assembly and the valve sleeve, the first chamber is connected to the oil inlet and the oil outlet, a first spring and a spring seat are arranged in the second chamber, one end of the first spring is fixed to the inner wall of the second chamber, the other end of the first spring is in contact with the spring seat, the spring seat is slidably arranged in the second chamber, the spring seat is fixed to the valve core, one end of the valve core is arranged between the oil outlet and the oil inlet, the other end of the valve core is in contact with the regulating assembly, a control port is arranged on the valve body, and a fourth chamber is formed between the control port and the regulating assembly. The present invention realizes the pilot ratio adjustment of the hydraulically controlled one-way valve, so that the hydraulically controlled one-way valve can meet the use environment of different load conditions.

Description

Technical Field

[0001] The invention relates to the technical field of control valves, and in particular to a hydraulically controlled one-way valve with a variable pilot ratio. Background Art

[0002] A hydraulically controlled check valve is a valve used in hydraulic systems. Its main function is to control the direction of liquid flow and allow liquid to flow in one direction under certain conditions. Compared with traditional check valves, hydraulically controlled check valves have an additional control oil circuit. When the control oil circuit is not connected to pressure oil, the hydraulically controlled check valve works like an ordinary check valve. Pressure oil only flows from the inlet to the outlet and cannot flow in the opposite direction. When there is control pressure input to the control oil circuit, the piston push rod pushes open the check valve core under the action of pressure oil, so that the inlet and outlet oil ports are connected, and the oil can flow in the opposite direction, which has higher flexibility and control ability.

[0003] The hydraulic control ratio (or pilot ratio) is an important technical parameter of the hydraulic control check valve. Hydraulic control check valves with different pilot ratios can only be used in a fixed load environment. When the load does not change much, a hydraulic control check valve with a larger pilot ratio is generally selected. This can reduce the pressure of the hydraulic control check valve's reverse opening and reduce the energy consumption of the hydraulic system. Under conditions where the load changes greatly, a hydraulic control check valve with a smaller pilot ratio is generally used. This can filter the fluctuation of the hydraulic control pressure. When the hydraulic control pressure fluctuates, the valve core opening fluctuation is smaller due to the smaller pilot ratio, making the operation of the hydraulic control check valve more stable.

[0004] The prior art has the following defects: the pilot ratio of the hydraulically controlled one-way valve in the prior art is fixed and cannot be adjusted. Hydraulic equipment needs to be used under different load environments. When a hydraulically controlled one-way valve with a small pilot ratio is used under conditions where the load does not change much, the hydraulic system pressure will be too high and energy will be consumed; and when a hydraulically controlled one-way valve with a large pilot ratio is used under conditions where the load changes, the operation of the hydraulically controlled one-way valve is unstable, causing the hydraulic equipment to shake, so there is room for improvement. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the present invention provides a hydraulically controlled one-way valve with a variable pilot ratio to solve the technical problems that the pilot ratio of the existing hydraulic one-way valve is not adjustable, which easily leads to excessive energy consumption of the hydraulic equipment or unstable operation of the hydraulically controlled one-way valve.

[0006] The present invention is achieved through the following technical solutions: A variable pilot ratio hydraulically controlled one-way valve, comprising a valve body, a valve sleeve, a valve core and an adjusting assembly, wherein the valve sleeve is threadedly mounted on one end of the valve body, the adjusting assembly is arranged in the valve body, the valve sleeve is provided with an oil inlet, an oil outlet, a first chamber and a second chamber, a third chamber is formed between the adjusting assembly and the valve sleeve, the first chamber is connected to the oil inlet and the oil outlet, the first chamber, the second chamber and the third chamber are coaxially arranged, the second chamber is connected to the first chamber and the third chamber, and the second chamber is provided with A first spring and a spring seat, one end of the first spring is fixed to the inner wall of the second chamber, the other end of the first spring is in contact with the spring seat, the spring seat is slidably arranged in the second chamber, the spring seat is fixed to the valve core, one end of the valve core is arranged between the oil outlet and the oil inlet, the other end of the valve core passes through the first chamber, the first spring, the spring seat and the third chamber in sequence, and is in contact with the adjusting component, a control port is arranged on the valve body, and a fourth chamber is formed between the control port and the adjusting component.

[0007] Preferably, the adjusting assembly includes an adjusting rod, a second spring and a pilot valve seat, the adjusting rod is provided with an adjusting thread, the adjusting rod is connected to the valve body via the adjusting thread, the pilot valve seat slides in the valve sleeve and abuts against the valve core, the pilot valve seat is plug-fitted with the adjusting rod, a fifth chamber is provided between the pilot valve seat and the adjusting rod, the second spring is provided in the fifth chamber, one end of the second spring abuts against the adjusting rod, and the other end abuts against the pilot valve seat.

[0008] Preferably, the pilot valve seat comprises a first valve seat and a second valve seat, the first valve seat and the second valve seat are in an embracing clamping fit, the outer wall of the first valve seat abuts against the valve core, and the second spring abuts against the inner wall of the second valve seat.

[0009] Preferably, a sixth chamber is further provided in the valve body, and the sixth chamber is communicated with the fourth chamber.

[0010] Preferably, the adjustment assembly further comprises a locking nut, the locking nut is threadedly connected to the adjustment rod, and the locking nut is used to lock and fix the adjustment rod.

[0011] Preferably, an oil passage is provided in the valve sleeve, and the oil passage is connected with the oil inlet and the second chamber.

[0012] Preferably, a limiting step is provided in the valve body, the valve sleeve is clamped in the limiting step, and the limiting step is used to limit the displacement of the valve sleeve toward the second valve seat.

[0013] Preferably, a first retaining spring is provided on the valve body and the valve sleeve, and the first retaining spring is used for limiting the displacement of the valve sleeve on the valve body.

[0014] Preferably, a second retaining spring is provided on the valve core and the spring seat, and the second retaining spring is used for limiting the displacement of the spring seat on the valve core.

[0015] Preferably, an annular groove is provided in the second valve seat, and a sealing ring is provided in the annular groove.

[0016] The beneficial effects of the present invention are: 1. The variable function of the pilot ratio of the hydraulically controlled one-way valve is realized through the combination of the valve body, valve sleeve, valve core and adjustment component. The setting of the oil inlet, oil outlet, first chamber, second chamber and third chamber on the valve sleeve ensures the flow path of the oil. The design of the first spring and spring seat ensures the stability of the valve core under different load environments. The coordination of the adjustment component and the valve core, through the design of the adjustment component and the control port, realizes the adjustment of the pilot ratio, thereby adapting to different load requirements and improving the efficiency and stability of the hydraulic system; 2. The position of the adjusting rod can be changed by the adjusting thread on the adjusting rod, thereby changing the compression amount of the second spring, and then adjusting the position of the pilot valve seat. The threaded connection of the adjusting rod makes the adjustment process precise and controllable, and the sliding fit of the pilot valve seat ensures the flexibility and response speed of the adjustment. Through the mutual cooperation of these technical features, the problem of how to achieve variable adjustment of the pilot ratio of the hydraulically controlled one-way valve through the adjusting component is solved. Through the setting of the adjusting component, the variable adjustment of the pilot ratio of the hydraulically controlled one-way valve can be achieved, and the adaptability of the hydraulically controlled one-way valve under different load environments is achieved. It effectively reduces the energy consumption of the hydraulic system and improves the working stability of the hydraulic equipment; 3. An oil channel is provided in the valve sleeve, and the oil channel connects the oil inlet and the second chamber. Through this structure, the oil can flow between the oil inlet and the second chamber, thereby realizing the oil flow control of the hydraulically controlled one-way valve under different load environments, and improving the adaptability and control ability of the hydraulically controlled one-way valve. The oil channel can be set in a variety of ways. For example, one or more oil channels can be opened on the inner wall of the valve sleeve. The shape of the channel can be circular, elliptical or other suitable shapes to ensure smooth flow of oil.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background technology, the drawings required for use in the embodiments of the present invention or the background technology will be described below.

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and, together with the specification, are used to illustrate the technical solutions disclosed in the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of the hydraulically controlled one-way valve of the present invention; Figure 2 An overall cross-sectional schematic diagram of the hydraulically controlled one-way valve of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0021] Legend: 1. Valve body; 2. Valve sleeve; 3. Valve core; 4. Adjustment assembly; 41. Adjustment rod; 42. Second spring; 43. Pilot valve seat; 431. First valve seat; 432. Second valve seat; 5. Oil inlet; 6. Oil outlet; 7. First chamber; 8. Second chamber; 9. Third chamber; 10. First spring; 11. Spring seat; 12. Control port; 13. Fourth chamber; 14. Adjustment thread; 15. Fifth chamber; 16. Sixth chamber; 17. Locking nut; 18. Oil channel; 19. Limit step; 20. First retaining ring; 21. Second retaining ring; 22. Ring groove; 23. Sealing ring. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", The directions or positional relationships indicated by "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, or are the directions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] See also Figure 1-Figure 3 A variable pilot ratio hydraulically controlled one-way valve comprises a valve body 1, a valve sleeve 2, a valve core 3 and an adjusting assembly 4. The valve sleeve 2 is threadedly mounted on one end of the valve body 1. The adjusting assembly 4 is arranged in the valve body 1. The valve sleeve 2 is provided with an oil inlet 5, an oil outlet 6, a first chamber 7 and a second chamber 8. A third chamber 9 is formed between the adjusting assembly 4 and the valve sleeve 2. The first chamber 7 is connected to the oil inlet 5 and the oil outlet 6. The first chamber 7, the second chamber 8 and the third chamber 9 are coaxially arranged. The second chamber 8 is connected to the first chamber 7 and the third chamber 9. The second chamber 8 is provided with a first Spring 10 and spring seat 11, one end of the first spring 10 is fixed to the inner wall of the second chamber 8, the other end of the first spring 10 abuts against the spring seat 11, the spring seat 11 is slidably set in the second chamber 8, the spring seat 11 is fixed to the valve core 3, one end of the valve core 3 is set between the oil outlet 6 and the oil inlet 5, the other end of the valve core 3 passes through the first chamber 7, the first spring 10, the spring seat 11 and the third chamber 9 in sequence, and abuts against the adjustment component 4, a control port 12 is set on the valve body 1, and a fourth chamber 13 is formed between the control port 12 and the adjustment component 4.

[0030] The variable function of the pilot ratio of the hydraulically controlled one-way valve is realized through the combination of the valve body 1, the valve sleeve 2, the valve core 3 and the adjusting component 4. The arrangement of the oil inlet 5, the oil outlet 6, the first chamber 7, the second chamber 8 and the third chamber 9 on the valve sleeve 2 ensures the flow path of the oil. The design of the first spring 10 and the spring seat 11 ensures the stability of the valve core 3 under different load environments. The cooperation of the adjusting component 4 and the valve core 3, through the design of the adjusting component 4 and the control port 12, realizes the adjustment of the pilot ratio, thereby adapting to different load requirements and improving the efficiency and stability of the hydraulic system.

[0031] In order to adjust the pilot ratio of the hydraulically controlled one-way valve and make the adjustment process more accurate and controllable, in one embodiment, the adjustment assembly 4 includes an adjustment rod 41, a second spring 42 and a pilot valve seat 43. The adjustment rod 41 is provided with an adjustment thread 14, and the adjustment rod 41 is connected to the valve body 1 through the adjustment thread 14. The pilot valve seat 43 slides in the valve sleeve 2 and abuts against the valve core 3. The pilot valve seat 43 is plugged and matched with the adjustment rod 41. A fifth chamber 15 is provided between the pilot valve seat 43 and the adjustment rod 41. The second spring 42 is provided in the fifth chamber 15. One end of the second spring 42 abuts against the adjustment rod 41, and the other end abuts against the pilot valve seat 43. The adjustment rod 41, the second spring 42 and the pilot valve seat 43 in the adjustment assembly 4 work together. Through the adjustment thread 14 on the adjustment rod 41, the position of the adjustment rod 41 can be changed, thereby changing the compression amount of the second spring 42, and then adjusting the position of the pilot valve seat 43. The pilot valve seat 43 is in contact with the valve core 3, and the pilot ratio of the hydraulically controlled one-way valve can be changed by sliding adjustment. The threaded connection of the adjusting rod 41 makes the adjustment process precisely controllable, and the sliding fit of the pilot valve seat 43 ensures the flexibility and response speed of the adjustment. Through the mutual cooperation of these technical features, the problem of how to achieve variable adjustment of the pilot ratio of the hydraulically controlled one-way valve through the adjustment component 4 is solved. The adjustment thread 14 on the adjusting rod 41 can adopt a variety of forms, such as trapezoidal threads or rectangular threads, to ensure stability and accuracy during the adjustment process. The material of the second spring 42 can be selected from high-strength alloy steel to ensure its durability and elasticity during long-term use. The plug-in fit between the pilot valve seat 43 and the adjusting rod 41 can adopt a cylindrical fit or a conical fit to ensure the smooth sliding of the pilot valve seat 43 during the adjustment process. The size and shape of the fifth chamber 15 can be designed according to actual needs to optimize the working state of the second spring 42. Through the mutual cooperation of the above technical features, the regulating assembly 4 of the present application can realize variable adjustment of the pilot ratio of the hydraulically controlled one-way valve, solving the problem of the fixed and unadjustable pilot ratio in the prior art. Compared with the prior art, the hydraulically controlled one-way valve of the present application has stronger adaptability under different load environments, can effectively reduce the energy consumption of the hydraulic system, and improve the working stability of the hydraulic equipment.

[0032] In order to improve the working stability and control accuracy of the hydraulically controlled one-way valve and ensure the reliability and consistency under different working conditions, based on this, in one embodiment, the pilot valve seat 43 includes a first valve seat 431 and a second valve seat 432, the first valve seat 431 and the second valve seat 432 are in an embracing clamping fit, the outer wall of the first valve seat 431 abuts against the valve core 3, and the second spring 42 abuts against the inner wall of the second valve seat 432. The design of the pilot valve seat 43 includes the first valve seat 431 and the second valve seat 432, which are connected by an embracing clamping fit. The outer wall of the first valve seat 431 abuts against the valve core 3, ensuring the stability of the pilot valve seat 43 when the valve core 3 moves. The second spring 42 abuts against the inner wall of the second valve seat 432, providing sufficient elastic support, so that the pilot valve seat 43 can accurately control the opening and closing of the valve core 3 under the action of the hydraulic control pressure. Through this design, the instability problem that may occur in the working process of the pilot valve seat 43 is solved, and the working stability and control accuracy of the hydraulic control one-way valve are improved. The embracing clamping fit of the first valve seat 431 and the second valve seat 432 can be achieved in a variety of ways. For example, the first valve seat 431 and the second valve seat 432 can be snap-fitted through the design of the slot and the protrusion, or the embracing fit can be achieved by elastic buckle. In addition, the material selection of the first valve seat 431 and the second valve seat 432 can be a wear-resistant and corrosion-resistant metal material to improve its service life and reliability. The elastic force of the second spring 42 can be adjusted according to the specific requirements of the hydraulic system to ensure the best control effect. Through the above design, the pilot valve seat 43 structure of the present application effectively solves the problem of unstable fit between the pilot valve seat 43 and the valve core 3 and the spring in the prior art. Compared with the prior art, the design of the present application improves the working stability and control accuracy of the hydraulic control one-way valve, and ensures reliability and consistency under different working conditions.

[0033] In order to optimize the hydraulic flow path and improve the working efficiency and stability of the hydraulic system, based on this, in one embodiment, a sixth chamber 16 is further provided in the valve body 1, and the sixth chamber 16 is communicated with the fourth chamber 13. By providing the sixth chamber 16 in the valve body 1 and communicating it with the fourth chamber 13, the communication between different chambers in the hydraulic system is effectively achieved, and the technical problem of achieving the communication between the sixth chamber 16 and the fourth chamber 13 in the hydraulically controlled one-way valve is solved. The communication between the sixth chamber 16 and the fourth chamber 13 can optimize the hydraulic flow path and improve the working efficiency and stability of the hydraulic system.

[0034] In order to ensure that the regulating assembly 4 can work stably during use and avoid affecting the performance of the hydraulically controlled one-way valve due to the loosening of the regulating rod 41, based on this, in one embodiment, the regulating assembly 4 also includes a locking nut 17, which is threadedly connected to the regulating rod 41, and the locking nut 17 is used to lock and fix the regulating rod 41. The regulating assembly 4 includes a locking nut 17 and an regulating rod 41, and the locking nut 17 is connected to the regulating rod 41 through a thread. The function of the locking nut 17 is to fix the position of the regulating rod 41 to prevent it from loosening during the adjustment process. Through the cooperation of the locking nut 17 and the regulating rod 41, it is ensured that the regulating assembly 4 can work stably during use, and avoid affecting the performance of the hydraulically controlled one-way valve due to the loosening of the regulating rod 41. The locking nut 17 can be implemented in a variety of ways, for example, it can be designed as a structure with a locking washer to further enhance the locking effect. Specifically, the locking nut 17 can be in the form of a self-locking nut, using a built-in nylon ring or a metal locking sheet to increase friction and prevent loosening. A plurality of thread grooves can also be provided on the adjusting rod 41 so that the locking nut 17 can be locked at different positions to meet different adjustment requirements. Through the above technical solution, the present application solves the problem that the adjusting assembly 4 is not firmly fixed during the adjustment process. The introduction of the locking nut 17 ensures that the adjusting rod 41 can be stable and immobile during use, thereby improving the working stability and reliability of the hydraulically controlled one-way valve and avoiding performance problems caused by the loosening of the adjusting rod 41.

[0035] In order to realize the oil flow control of the hydraulically controlled one-way valve under different load environments and improve the adaptability and control ability of the hydraulically controlled one-way valve, based on this, in one embodiment, an oil passage 18 is provided in the valve sleeve 2, and the oil passage 18 connects the oil inlet 5 and the second chamber 8. The valve sleeve 2 is provided with an oil passage 18, and the oil passage 18 connects the oil inlet 5 and the second chamber 8. Through this structure, the oil can flow between the oil inlet 5 and the second chamber 8, thereby realizing the oil flow control of the hydraulically controlled one-way valve under different load environments. This technical solution solves the oil flow control problem of the hydraulically controlled one-way valve under different load environments by providing the oil passage 18 in the valve sleeve 2, and improves the adaptability and control ability of the hydraulically controlled one-way valve. The setting of the oil passage 18 can be adopted in a variety of ways, for example, one or more oil passages 18 can be opened on the inner wall of the valve sleeve 2, and the shape of the passage can be circular, elliptical or other suitable shapes to ensure the smooth flow of the oil. In addition, the size of the oil passage 18 needs to be designed according to the flow demand in actual applications to ensure that the oil can flow effectively under different load environments.

[0036] In order to effectively control the position of the valve sleeve 2 and prevent it from moving unnecessarily during operation, based on this, in one embodiment, a limiting step 19 is provided in the valve body 1, and the valve sleeve 2 is clamped in the limiting step 19. The limiting step 19 is used to limit the displacement of the valve sleeve 2 in the direction of the second valve seat 432. A limiting step 19 is provided in the valve body 1, and the valve sleeve 2 is clamped in the limiting step 19. The function of the limiting step 19 is to limit the displacement of the valve sleeve 2 in the direction of the second valve seat 432. Through this design, the position of the valve sleeve 2 can be effectively controlled to prevent it from moving unnecessarily during operation, thereby improving the working stability and reliability of the hydraulically controlled one-way valve. The limiting step 19 can be implemented in a variety of ways, such as machining an annular step on the inner wall of the valve body 1, or fixing a limiting structure by welding, riveting, etc. The valve sleeve 2 can be fixed on the limiting step 19 by clamping, threading, etc. to ensure that it will not be displaced during operation.

[0037] In order to limit the displacement of the valve sleeve 2 on the valve body 1 and improve the limiting effect, based on this, in one embodiment, a first retaining spring 20 is provided on the valve body 1 and the valve sleeve 2, and the first retaining spring 20 is used to limit the displacement of the valve sleeve 2 on the valve body 1. By providing the first retaining spring 20 on the valve body 1 and the valve sleeve 2, the first retaining spring 20 limits the displacement of the valve sleeve 2 on the valve body 1, thereby solving the problem of limiting the displacement of the valve sleeve 2 on the valve body 1. The first retaining spring 20 can be made of elastic material, such as a steel wire retaining spring, which has good elasticity and strength, and can effectively clamp the valve sleeve 2 and the valve body 1 to prevent the valve sleeve 2 from axially displacing on the valve body 1. During installation, the first retaining spring 20 can be embedded in the corresponding grooves of the valve body 1 and the valve sleeve 2 to achieve the limiting function. As a preferred embodiment, the first retaining spring 20 can be designed as an annular structure to ensure uniform distribution when subjected to force, further improving the limiting effect.

[0038] In order to ensure that the spring seat 11 maintains a stable position during operation and avoids unstable performance caused by displacement, based on this, in one embodiment, a second retaining spring 21 is provided on the valve core 3 and the spring seat 11, and the second retaining spring 21 is used to limit the displacement of the spring seat 11 on the valve core 3. By providing the second retaining spring 21 on the valve core 3 and the spring seat 11, the displacement of the spring seat 11 on the valve core 3 can be effectively limited, thereby ensuring that the spring seat 11 maintains a stable position during operation and avoiding the problem of unstable performance caused by displacement. The second retaining spring 21 can adopt a variety of structural forms, such as an elastic retaining spring, a spiral retaining spring or other suitable retaining spring structures. The second retaining spring 21 can be installed on the valve core 3 and the spring seat 11 by mechanical fixing, welding or other suitable methods. In this way, it can be ensured that the position of the spring seat 11 on the valve core 3 does not deviate, thereby improving the working stability of the hydraulically controlled one-way valve. In addition, the material of the second retaining spring 21 can be selected from high-strength alloy steel or other materials with good elasticity and durability to ensure its reliability and durability in long-term use.

[0039] In order to prevent liquid leakage and improve the sealing performance of the valve, based on this, in one embodiment, an annular groove 22 is provided in the second valve seat 432, and a sealing ring 23 is provided in the annular groove 22. The annular groove 22 in the second valve seat 432 ensures that the hydraulically controlled one-way valve can effectively prevent liquid leakage during operation by accommodating the sealing ring 23, thereby improving the sealing performance of the valve. In this way, the problem of how to achieve sealing in the second valve seat 432 can be solved. The design of the annular groove 22 can have various forms. For example, the annular groove 22 can be a rectangular groove, a trapezoidal groove or other suitable groove types to adapt to sealing rings 23 of different shapes and materials. The sealing ring 23 can be made of rubber, silicone or other elastic materials to ensure that it can fit closely to the inner wall of the annular groove 22 under pressure to form an effective seal. Further, the size and shape of the annular groove 22 need to be precisely designed according to the specifications of the sealing ring 23 to ensure the stability and sealing effect of the sealing ring 23 in the annular groove 22. In addition, the sealing ring 23 may be installed in different ways. For example, the sealing ring 23 may be fixed in the annular groove 22 by pressing, embedding or other suitable methods.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hydraulically controlled one-way valve with a variable pilot ratio, characterized in that: The invention comprises a valve body, a valve sleeve, a valve core and an adjusting component, wherein the valve sleeve is threadedly installed on one end of the valve body, the adjusting component is arranged in the valve body, the valve sleeve is provided with an oil inlet, an oil outlet, a first chamber and a second chamber, a third chamber is formed between the adjusting component and the valve sleeve, the first chamber is connected with the oil inlet and the oil outlet, the first chamber, the second chamber and the third chamber are coaxially arranged, the second chamber is connected with the first chamber and the third chamber, a first spring and a spring seat are arranged in the second chamber, one end of the first spring is fixed to the inner wall of the second chamber, the other end of the first spring abuts against the spring seat, the spring seat is slidably arranged in the second chamber, the spring seat is fixed to the valve core, one end of the valve core is arranged between the oil outlet and the oil inlet, the other end of the valve core passes through the first chamber, the first spring, the spring seat and the third chamber in sequence, and abuts against the adjusting component, a control port is arranged on the valve body, and a fourth chamber is formed between the control port and the adjusting component.

2. A variable pilot ratio hydraulically controlled one-way valve according to claim 1, characterized in that: The adjusting assembly includes an adjusting rod, a second spring and a pilot valve seat, the adjusting rod is provided with an adjusting thread, the adjusting rod is connected to the valve body through the adjusting thread, the pilot valve seat slides in the valve sleeve and abuts against the valve core, the pilot valve seat is plug-fitted with the adjusting rod, a fifth chamber is provided between the pilot valve seat and the adjusting rod, the second spring is provided in the fifth chamber, one end of the second spring abuts against the adjusting rod, and the other end abuts against the pilot valve seat.

3. A variable pilot ratio hydraulically controlled one-way valve according to claim 2, characterized in that: The pilot valve seat includes a first valve seat and a second valve seat. The first valve seat and the second valve seat are in an embracing clamping fit. The outer wall of the first valve seat abuts against the valve core, and the second spring abuts against the inner wall of the second valve seat.

4. A variable pilot ratio hydraulically controlled one-way valve according to claim 2, characterized in that: A sixth chamber is also provided in the valve body, and the sixth chamber is communicated with the fourth chamber.

5. The variable pilot ratio hydraulically controlled one-way valve according to claim 2, characterized in that: The adjustment assembly also includes a locking nut, which is threadedly connected to the adjustment rod and is used to lock and fix the adjustment rod.

6. A variable pilot ratio hydraulically controlled one-way valve according to claim 1, characterized in that: An oil passage is arranged in the valve sleeve, and the oil passage is connected with the oil inlet and the second chamber.

7. A variable pilot ratio hydraulically controlled one-way valve according to claim 3, characterized in that: A limiting step is arranged in the valve body, the valve sleeve is clamped in the limiting step, and the limiting step is used to limit the displacement of the valve sleeve toward the second valve seat.

8. A variable pilot ratio hydraulically controlled one-way valve according to claim 7, characterized in that: The valve body and the valve sleeve are provided with a first retaining spring, and the first retaining spring is used for limiting the displacement of the valve sleeve on the valve body.

9. The variable pilot ratio hydraulically controlled one-way valve according to claim 1, characterized in that: A second retaining spring is arranged on the valve core and the spring seat, and the second retaining spring is used to limit the displacement of the spring seat on the valve core.

10. The variable pilot ratio hydraulically controlled one-way valve according to claim 3, characterized in that: An annular groove is arranged in the second valve seat, and a sealing ring is arranged in the annular groove.

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