Integrated electro-hydraulic proportional multi-way reversing valve
By integrating the electro-hydraulic proportional multi-way directional valve into the valve body, the main valve core can be precisely controlled, which solves the problems of complex structure and high risk of sealing failure of existing multi-way directional valves and improves the reliability and stability of the system.
Patent Information
- Application Number
- CN202520343083.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Existing multi-way directional valves, when implementing electro-hydraulic proportional control, have complex structures, occupy large spaces, have a high risk of seal failure, high manufacturing costs, and poor system stability.
An integrated electro-hydraulic proportional multi-way directional valve is adopted, which integrates the electro-proportional pilot valve into the valve body, reducing process holes and sealing positions. The main valve core is precisely controlled by an electromagnetic drive mechanism, simplifying the structure and reducing the risk of leakage.
It reduces manufacturing costs and the risk of seal failure, improves system reliability and stability, simplifies processing, and reduces noise issues.
Smart Images
Figure CN223894583U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an integrated electro-hydraulic proportional multi-way reversing valve. Background Technology
[0002] In hydraulic systems, multi-way directional valves are key components, primarily used to control the sequential or compound actions of multiple actuators. Their working principle involves distributing hydraulic oil to the corresponding hydraulic cylinders or motors through different oil passages, achieving coordinated control of multiple actions. The control performance of the main valve core over the target flow path of the hydraulic oil directly determines the operating speed of the actuator.
[0003] Currently, the main control methods for the main valve core include hydraulic control and electro-hydraulic proportional control. With the continuous improvement of industrial automation, the requirements for the control accuracy and response speed of hydraulic systems are becoming increasingly stringent. Electro-hydraulic proportional control, with its outstanding advantages such as high control accuracy, fast response speed, good flexibility, and strong adaptability, is gradually replacing traditional hydraulic control and becoming the development trend in the field of multi-way directional valve control.
[0004] However, existing multi-way directional valves have many drawbacks in achieving electro-hydraulic proportional control. Structurally, a pilot valve block structure is required, which not only makes the entire system more complex but also occupies more installation space. At the same time, to meet the operational requirements of the pilot valve block, many additional process ports are needed. This increase in process ports significantly raises manufacturing costs and adds processing steps and complexity to the production process; furthermore, it introduces several additional risks to the system. For example, more process ports mean more sealing positions, greatly increasing the possibility of seal failure. Once a seal fails, hydraulic oil leakage occurs, affecting the normal operation of the system. In addition, pilot valve core jamming and noise problems also occur frequently, seriously affecting the stability and reliability of the system. Utility Model Content
[0005] To overcome the shortcomings of the prior art, this utility model provides an integrated electro-hydraulic proportional multi-way directional valve, which can reduce the number of process holes and sealing positions in the product, reduce manufacturing costs, and improve product reliability.
[0006] This utility model discloses an integrated electro-hydraulic proportional multi-way directional valve, comprising a first connection component and a last connection component located at both ends, and at least one electro-hydraulic proportional directional valve arranged side-by-side between the first connection component and the last connection component. The first connection component is provided with a main oil inlet and a main oil return port for connection to an oil pump and an oil tank. An oil inlet passage and a oil return passage are respectively connected to the main oil inlet and the main oil return port through the connection of the first connection component, the electro-hydraulic proportional directional valve, and the last connection component. The oil inlet passage and the oil return passage are formed by connecting orifices and grooves respectively provided on the first connection component, the electro-hydraulic proportional directional valve, and the last connection component. The orifice and groove connection is sealed by pressing a sealing ring provided between the first connection component, the electro-hydraulic proportional directional valve, and the last connection component to prevent oil leakage. The last connection component is provided with a pilot oil inlet and a pilot unloading port. Two pressure oil passages are connected to the pilot oil inlet and the pilot unloading port through the connection of the electro-hydraulic proportional directional valve and the last connection component. The electro-hydraulic proportional directional valve, which connects two unloading oil passages, includes a valve body, a main valve core mounted on the valve body, and two working oil ports. The main valve core is movably disposed between the two working oil ports, the inlet oil passage, and the return oil passage. The lateral displacement of the main valve core adjusts the switching connection or disconnection between the two working oil ports and the inlet and return oil passages. The valve body of the electro-hydraulic proportional directional valve includes two pilot oil chambers located at both ends of the main valve core. The two pilot oil chambers are respectively connected to two pressure oil passages and two unloading oil passages. The valve body of the electro-hydraulic proportional directional valve also movably mounts two electro-proportional pilot valve cores and an electromagnetic drive mechanism for driving the displacement of the electro-proportional pilot valve cores. The electro-proportional pilot valve cores are movably disposed between the pilot oil chamber, the pressure oil passage, and the unloading oil passage. The electromagnetic drive mechanism adjusts the pressure of the pilot oil chamber by driving the electro-proportional pilot valve cores, thereby pushing the main valve core to produce displacement and achieving precise control.
[0007] Furthermore, the valve body of the electro-hydraulic proportional directional valve has a plate-like structure, which is wider in the transverse direction and narrower in the longitudinal direction. The main valve core is laterally movably inserted into the upper part of the valve body. The two working oil ports of the electro-hydraulic proportional directional valve are laterally spaced at the upper end of the valve body to facilitate pipeline connection. The upper part of the transverse sides of the valve body is provided with openings that allow the two ends of the main valve core to extend to the outside of the valve body. Covers are fixedly installed at the corresponding openings on the transverse sides of the valve body. The cover includes a cavity for accommodating the end of the main valve core. The pilot oil chamber is formed by the cavity of the cover. The structure is simple and compact, which facilitates the processing and manufacturing of the valve body.
[0008] Furthermore, two electro-proportional pilot valve cores are respectively laterally movably inserted into the inner side of the lower part of the lateral sides of the valve body, and two electromagnetic drive mechanisms are respectively installed on the outer side of the lower part of the lateral sides of the valve body. The outer ends of the two electromagnetic drive mechanisms are provided with power interfaces, which facilitates the assembly of the electro-proportional pilot valve cores and electromagnetic drive mechanisms, simplifies the valve body structure, and reduces the space occupied inside the valve body.
[0009] Furthermore, the lower part of the transverse end faces of the valve body is provided with recessed holes for inserting the proportional pilot valve core. Two through holes connected to the recessed holes are provided on the longitudinal end faces of the valve body at the corresponding positions of the recessed holes. The longitudinal direction refers to the parallel connection direction of the electro-hydraulic proportional directional valves. The two through holes are components of the pressure oil passage and the unloading oil passage, respectively. A V-shaped shallow groove is provided on one longitudinal side of the valve body. One end of the V-shaped shallow groove is connected to the pilot oil chamber through an oblique hole and a transverse hole, and the other end of the V-shaped shallow groove is connected to the recessed hole through a longitudinal hole. The valve body has a simple structure, facilitating its production and processing. The through holes between multiple adjacent parallel electro-hydraulic proportional directional valves or between an electro-hydraulic proportional directional valve and a tail assembly can be spliced to form the pressure oil passage and the unloading oil passage. The opening of the V-shaped shallow groove can also be sealed through the end face of the adjacent electro-hydraulic proportional directional valve or tail assembly. The splice is sealed with a sealing ring to prevent oil leakage.
[0010] Furthermore, the tail assembly includes a pressure relief valve connected to the pressure oil passage. The pressure relief valve on the tail assembly can prevent the oil pressure in the pressure oil passage from becoming too high, thus providing a protective function.
[0011] The beneficial effects of this utility model are: the integrated electro-hydraulic proportional multi-way directional valve integrates the electro-proportional pilot valve into the valve body, reducing the number of process holes and sealing positions, reducing processing difficulty and manufacturing cost, and also reducing the risk of leakage, valve core jamming and noise, thus improving reliability. Attached Figure Description
[0012] Figure 1 Three-dimensional representation of the present utility model Figure 1 ;
[0013] Figure 2 Three-dimensional representation of the present utility model Figure 2 ;
[0014] Figure 3 This is a cross-sectional view of the electro-hydraulic proportional directional valve according to an embodiment of the present utility model.
[0015] Figure 4 A three-dimensional cross-sectional view of the electro-hydraulic proportional directional valve according to an embodiment of this utility model. Figure 1 ;
[0016] Figure 5 A three-dimensional cross-sectional view of the electro-hydraulic proportional directional valve according to an embodiment of this utility model. Figure 2 . Detailed Implementation
[0017] The structure of an integrated electro-hydraulic proportional multi-way directional valve according to an embodiment of this utility model is as follows: Figure 1-5As shown, it includes a first connection component 1 and a last connection component 2 located at both ends, and at least one electro-hydraulic proportional directional valve 3 arranged side by side between the first connection component 1 and the last connection component 2. The first connection component 1 is provided with a main oil inlet 11 and a main oil return port 12 for connecting to an oil pump and an oil tank. The first connection component 1, the electro-hydraulic proportional directional valve 3, and the last connection component 2 are connected to form an oil inlet passage 41 and an oil return passage 42 respectively connected to the main oil inlet 11 and the main oil return port 12. The oil inlet passage 41 and the oil return passage 42 are respectively provided by the first connection component 1. The electro-hydraulic proportional directional valve 3 and the tail assembly 2 are connected by a groove and orifice. The groove and orifice connection is sealed by a sealing ring pressed between the head assembly 1, the electro-hydraulic proportional directional valve 3, and the tail assembly 2 to prevent oil leakage. The tail assembly is provided with a pilot inlet 211 and a pilot unloading port 212. The electro-hydraulic proportional directional valve 3 and the tail assembly 2 are connected to form two pressure oil passages 311 connected to the pilot inlet 211 and two unloading oil passages 312 connected to the pilot unloading port 212. The directional valve 3 includes a valve body 31, a main valve core 32 mounted on the valve body 31, and two working ports 33. The main valve core 32 is movably disposed between the two working ports 33, the inlet oil passage 41, and the return oil passage 42. The switching between the two working ports 33 and the inlet oil passage 41 and the return oil passage 42 is adjusted based on the displacement of the main valve core 32. The valve body 31 of the electro-hydraulic proportional directional valve 3 includes two pilot oil chambers 34 located at both ends of the main valve core 32. The two pilot oil chambers 34 are respectively connected to two pressure oil passages 311. Two unloading oil passages 312 are connected to each other. The valve body 31 of the electro-hydraulic proportional directional valve 3 is also movably provided with two electro-proportional pilot valve cores 35 and an electromagnetic drive mechanism 36 for driving the electro-proportional pilot valve cores 35 to move. The electro-proportional pilot valve cores 35 are movably disposed between the pilot oil chamber 34, the pressure oil passage 311 and the unloading oil passage 312. The electromagnetic drive mechanism 36 adjusts the pressure of the pilot oil chamber 34 by driving the electro-proportional pilot valve cores 35 to move, thereby pushing the main valve core 32 to move and achieve fine control.
[0018] The valve body 31 of the electro-hydraulic proportional directional valve 3 has a plate-like structure, which is wider in the transverse direction and narrower in the longitudinal direction. The main valve core 32 is laterally movably inserted into the upper part of the valve body 31. The two working oil ports 33 of the electro-hydraulic proportional directional valve 3 are laterally spaced and arranged at the upper end of the valve body 31 to facilitate pipeline connection. The upper part of the transverse sides of the valve body 31 is provided with openings that allow the two ends of the main valve core 32 to extend to the outside of the valve body 31. Covers 37 are fixedly installed at the corresponding openings on the transverse sides of the valve body 31. The cover 37 includes a cavity for accommodating the end of the main valve core 32. The pilot oil chamber 34 is formed by connecting the cavity of the cover 37 and the outer wall of the valve body 31. The structure is simple and compact, which facilitates the processing and manufacturing of the valve body 31.
[0019] The valve body 31 has recessed holes 313 for inserting a power supply proportional pilot valve core 35 at the lower part of its transverse two end faces. The valve body 31 also has two through holes (i.e.,...) at the corresponding positions of the recessed holes 313 on its longitudinal two end faces. Figure 4 , Figure 5 In the middle, the pressure oil passage 311 and the unloading oil passage 312 correspond to the holes and grooves. The longitudinal direction refers to the parallel connection direction of the electro-hydraulic proportional directional valve 3. The two through holes are the components of the pressure oil passage 311 and the unloading oil passage 312, respectively. A V-shaped shallow groove 314 is provided on one longitudinal side of the valve body 31. One end of the V-shaped shallow groove 314 is connected to the pilot oil chamber 34 through the inclined hole 315 and the transverse hole 316. One end of the transverse hole 316 is connected to the upper end of the inclined hole 315. The other end of the transverse hole 316 is provided on the transverse end face of the valve body 31 and is connected to the pilot oil chamber 34. The lower end of the inclined hole 315 is connected to one end of the V-shaped shallow groove 314. The other end of the V-shaped shallow groove 314 is connected to the concave hole 313 through the longitudinal hole 317. The structure of the valve body 31 is simple and convenient for the production and processing of the valve body 31. The through holes between multiple adjacent electro-hydraulic proportional directional valves 3 connected side by side, or between an electro-hydraulic proportional directional valve 3 and a tail connector 2, can be spliced to form the pressure oil passage 311 and the unloading oil passage 312. The opening of the V-shaped shallow groove 314 can also be sealed by the longitudinal end face of the adjacent electro-hydraulic proportional directional valve 3 or the tail connector 2. The splice is sealed with a sealing ring to prevent oil leakage. The end of the through hole of the electro-hydraulic proportional directional valve 3 located closest to the first connector 1 can be sealed with a plug.
[0020] During operation, the hydraulic oil in the pressure oil passage 311 is depressurized by the electro-proportional pilot valve core 35 and then enters the pilot oil chamber 34. The pressure of the oil in the pilot oil chamber 34 is adjusted by driving the electro-proportional pilot valve core 35 to move. The unloading oil passage 312 can be used for pressure relief. By adjusting the pressure difference between the pilot oil chambers 34 at both ends of the main valve core 32, the displacement of the main valve core 32 can be precisely controlled, thereby achieving precise regulation of the oil flow rate.
[0021] Two electro-proportional pilot valve cores 35 are respectively laterally movably inserted into the recesses 313 on the lower part of the lateral sides of the valve body 31. Two electromagnetic drive mechanisms 36 are respectively installed on the outer side of the lower part of the lateral sides of the valve body 31, which facilitates the assembly of the electro-proportional pilot valve cores 35 and the electromagnetic drive mechanisms 36. The outer ends of the two electromagnetic drive mechanisms 36 are provided with power interfaces, which can simplify the structure of the valve body 31 and reduce the space occupied inside the valve body 31.
[0022] The tail assembly 2 includes a pressure-reducing relief valve connected to the pressure oil passage 311. The pressure-reducing relief valve on the tail assembly 2 can prevent the pressure in the pressure oil passage 311 from becoming too high, thus providing protection. The pressure-reducing relief valve is located between the return oil passage 42 and the pressure oil passage 311. The return oil passage 42 can be used for pressure relief.
[0023] It should be noted that a plug is provided at the working oil port 33 in the attached diagram. In actual use, it can be disassembled and installed according to the needs of the oil circuit.
[0024] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.
Claims
1. An integrated electro-hydraulic proportional multi-way directional valve, comprising a first connection component and a last connection component disposed at both ends, and at least one electro-hydraulic proportional directional valve disposed side-by-side between the first connection component and the last connection component, wherein the first connection component is provided with a main oil inlet and a main oil return port, and the first connection component, the electro-hydraulic proportional directional valve, and the last connection component are connected to form an oil inlet passage and a oil return passage respectively connected to the main oil inlet and the main oil return port, characterized in that: The tail assembly is provided with a pilot oil inlet and a pilot unloading port. The electro-hydraulic proportional directional valve and the tail assembly are connected to form two pressure oil passages connected to the pilot oil inlet and two unloading oil passages connected to the pilot unloading port. The electro-hydraulic proportional directional valve includes a valve body, a main valve core disposed on the valve body, and two working oil ports. The main valve core is movably disposed between the two working oil ports, the oil inlet passage, and the oil return passage. The valve body of the electro-hydraulic proportional directional valve includes two pilot oil chambers located at both ends of the main valve core. The valve body of the electro-hydraulic proportional directional valve also movably disposed with two electro-proportional pilot valve cores and an electromagnetic drive mechanism for driving the displacement of the electro-proportional pilot valve cores. The electro-proportional pilot valve cores are movably disposed between the pilot oil chamber, the pressure oil passage, and the unloading oil passage.
2. The integrated electro-hydraulic proportional multi-way directional valve according to claim 1, characterized in that: The valve body of the electro-hydraulic proportional directional valve has a plate-like structure. The main valve core is laterally movably inserted into the upper part of the valve body. The two working oil ports of the electro-hydraulic proportional directional valve are laterally spaced at the upper end of the valve body. Openings are provided on the upper part of the lateral sides of the valve body, allowing the two ends of the main valve core to extend to the outside of the valve body. Covers are fixedly installed on the lateral sides of the valve body at the corresponding openings. The cover includes a cavity for accommodating the end of the main valve core. The pilot oil chamber is formed by the cavity of the cover.
3. The integrated electro-hydraulic proportional multi-way directional valve according to claim 2, characterized in that: Two electro-proportional pilot valve cores are respectively laterally movably inserted into the inner side of the lower part of the lateral sides of the valve body, and two electromagnetic drive mechanisms are respectively installed on the outer side of the lower part of the lateral sides of the valve body. Power interfaces are provided at the outer ends of the two electromagnetic drive mechanisms.
4. An integrated electro-hydraulic proportional multi-way directional valve according to claim 3, characterized in that: The valve body has recessed holes for inserting the power supply proportional pilot valve core at the lower part of the transverse two end faces. The valve body has two through holes connected to the recessed holes at the corresponding positions on the longitudinal two end faces. The valve body has a V-shaped shallow groove on one longitudinal side. One end of the V-shaped shallow groove is connected to the pilot oil chamber through an oblique hole and a transverse hole. The other end of the V-shaped shallow groove is connected to the recessed hole through a longitudinal hole.
5. An integrated electro-hydraulic proportional multi-way directional valve according to claim 1, characterized in that: The tail assembly includes a pressure relief valve connected to the pressure oil passage.