A dual-line manual-automatic switching valve assembly

Abstract

This application relates to a dual-line manual / automatic switching valve assembly, comprising a mounting plate, a valve body, a switching valve core, a reversing valve core, and a filler port assembly. The valve body is fixed to the mounting plate and has a first port, a second port, a return port, and an outlet port. The switching valve core and the reversing valve core are rotatably mounted within the valve body. The valve body contains a filler pipe consisting of a main pipe, a first branch pipe, and a second branch pipe. The filler port assembly blocks the main pipe port, and the first and second branch pipes are respectively connected to their corresponding ports. The valve body also includes a first return oil line and a second return oil line, each matching one of the two sets of ports. The switching valve core controls the oil circuit flow, and the reversing valve core switches the oil supply path, so that when one branch pipe supplies oil to a corresponding port, the other port connects to the corresponding return oil line to complete the return oil flow. This application improves the operational tolerance of the lubrication pump.

Description

Technical Field

[0001] This application relates to the field of lubrication pumps, and more particularly to a dual-line manual / automatic switching valve assembly. Background Technology

[0002] In the field of centralized lubrication of heavy equipment, dual-line lubrication pumps are widely used in engineering machinery, metallurgical and mining equipment due to their advantages of alternating oil supply through dual oil circuits, stable pressure and uniform lubrication at multiple points. As the core reversing control component of the dual-line lubrication system, the reversing valve is mainly divided into two types: mechanical reversing valve and electromagnetic reversing valve. Its structure and performance directly determine the operational stability of the entire lubrication system.

[0003] Most dual-line directional valves currently used in the market have a single-function structure: one type is the mechanical manual directional valve, which relies on manual operation to switch oil circuits. It is only suitable for scenarios such as equipment shutdown for maintenance and debugging, and cannot meet the needs of continuous automated operation of equipment. Manual operation has problems such as lag and misoperation, which can easily cause uneven oil supply and aggravate the wear of equipment friction pairs. The other type is the electromagnetic automatic directional valve, which can achieve automatic switching through electrical control to meet the needs of automated lubrication. However, it is completely dependent on the electrical control system. Power grid fluctuations, line faults and damage to electrical control components in the field can all cause the solenoid valve to fail and the oil circuit switching to fail, resulting in the interruption of the lubrication system.

[0004] Existing mechanical and solenoid directional valves are both single-mode operation and are incompatible with each other. Solenoid valves do not have manual emergency function when they malfunction, and can only be shut down for maintenance, which affects the continuity of production. At the same time, both types of valves are prone to problems such as oil pressure fluctuation, unreliable oil circuit sealing and poor oil return when operating under high pressure. The system's fault tolerance and lubrication reliability need to be further improved. Summary of the Invention

[0005] To improve the operational tolerance of the lubrication pump, this application provides a dual-line manual / automatic switching valve assembly.

[0006] This application provides a dual-line manual / automatic switching valve assembly, which adopts the following technical solution: A dual-line manual / automatic switching valve assembly includes a mounting plate, a valve body, a switching valve core, a reversing valve core, and a filler port assembly. The valve body is mounted on the mounting plate. A first interface and a second interface are provided on one side of the valve body, as are a return port and an outlet port. The switching valve core is rotatably connected to the valve body. The switching valve core is used to simultaneously disconnect the connection between the first interface and the return port, and between the second interface and the outlet port. The switching valve core has two connecting holes, which simultaneously connect the first interface to the return port and the second interface to the outlet port. A filler pipe is provided within the valve body. The refueling pipeline includes a main pipe, a first branch pipe, and a second branch pipe. The refueling port assembly is disposed on the valve body and is used to block the main pipe. Both the first and second branch pipes are connected to the main pipe. The first branch pipe is used to communicate with a first interface, and the second branch pipe is used to communicate with a second interface. The valve body also has a first return oil line and a second return oil line. The first return oil line corresponds to the first interface, and the second return oil line corresponds to the second interface. When the reversing valve core selects either branch pipe to perform an oil discharge operation to the corresponding interface, the return oil line of the other interface performs an oil return operation.

[0007] By adopting the above technical solution, a dual-mode switching system integrating manual and automatic operation is achieved for the dual-line lubrication switching valve. By adding an independent switching valve core, it can switch to automatic mode under normal operating conditions to adapt to continuous automated operation of the equipment. When the electrical control system experiences problems such as power grid fluctuations, line damage, or component failure, it can switch to manual emergency mode with one click, maintaining the basic operation of the lubrication system without stopping the machine for disassembly and maintenance. This effectively solves the industry pain point of existing automatic switching valve failures causing paralysis and severely affecting production continuity, significantly improving the operational fault tolerance of heavy equipment under complex operating conditions. Simultaneously, this solution constructs an independent manual refueling circuit system that is completely physically separated from the automatic inlet and return oil circuits. The system, through its independent oil circuit structure design with a main pipe plus first and second branch pipes, effectively avoids oil circuit crosstalk, pressure shocks, and oil contamination problems that may occur during manual and automatic mode switching. Through the precise linkage between the reversing valve core and the dual branch pipes and dual return oil lines, it strictly adheres to the core working principle of a dual-line lubrication system that relies on the pressure difference between the two lines to drive the distributor plunger. This ensures that when oil is discharged from any branch pipe to its corresponding interface, the return oil line corresponding to the other interface can simultaneously conduct return oil, ensuring that all lubrication points receive uniform and stable oil supply. This significantly reduces the problems of uneven oil supply and insufficient oil supply and wear at some lubrication points that are prone to occur in traditional single-mode valves. Furthermore, the reversing valve core has the ability to simultaneously cut off the connection between the first interface and the return oil port, and between the second interface and the outlet oil port. This enables complete physical isolation of the oil circuit throughout the mode switching process, preventing accidental high-pressure oil leakage and the entry of outside air into the system. This ensures the safety of mode switching operations and avoids unstable oil output and pipeline cavitation problems caused by air intrusion.

[0008] Optionally, the valve body has six pipe positions distributed along its length. The first interface and return port are located at the first pipe position, and the second interface and outlet port are located at the sixth pipe position. The main pipe includes a first vertical pipe, a second vertical pipe, a third vertical pipe, and a first horizontal pipe. The first vertical pipe is located at the first pipe position, the second vertical pipe is located at the second pipe position, and the third vertical pipe is located at the fifth position. The first horizontal pipe is connected to the first, second, and third vertical pipes. The filler assembly is connected to the first vertical pipe. The switching valve core is provided with L-shaped connecting pipes at the second and fifth pipe positions. When the switching valve core cuts off the connection between the first interface and the return port and the second interface and the outlet port, the second and third vertical pipes are connected to two connecting pipe boxes respectively. The first branch pipe and the second branch pipe are connected to two connecting pipes respectively. The switching valve core is used to cut off the connection between any branch pipe and the corresponding interface.

[0009] By adopting the above technical solution, and employing a modular and compact oil circuit layout with six pipeline positions evenly distributed along the length of the valve body, all functional oil circuits, such as oil outlet, oil return, branching, reversing, and mode switching, are integrated within the linear space of the same valve body. Compared to the traditional decentralized oil circuit layout, this significantly reduces the overall volume and weight of the valve body, lowers the installation space requirements, and better adapts to application scenarios with extremely limited installation space, such as heavy engineering machinery and metallurgical equipment. Simultaneously, the switching valve core uses two L-shaped connecting pipes to connect with the second and third vertical pipes of the main pipe. Compared to the traditional planar sealing structure, the cylindrical sealing contact area of ​​the L-shaped pipes is larger, and the sealing pressure distribution is more uniform. Under the working conditions of a dual-line lubrication system, this provides more reliable sealing performance and effectively reduces oil circuit leakage problems that are prone to occur during long-term high-pressure operation. In addition, the reversing valve core has the ability to cut off the connection between any branch pipe and the corresponding interface, which can ensure from the mechanical structure that only one branch pipe is in the oil supply state at the same time. This effectively avoids the possibility of two main pipelines being pressurized at the same time, and reduces the risk of failure due to pressure imbalance on both sides of the distributor plunger caused by simultaneous pressurization of the two pipelines, resulting in the inability to operate and all lubrication points failing to supply oil.

[0010] Optionally, the first branch pipe includes pipe 1, pipe 12, and pipe 13. Pipe 11 is horizontally arranged and located at the second pipeline station. One end of pipe 11 is used to connect to the connecting pipeline of the corresponding station. Pipe 12 is vertically arranged and located at the second pipeline station. Pipe 12 is connected to pipe 11. Pipe 13 is vertically arranged and located at the first pipeline station. Pipe 13 is connected to the first interface. The second branch pipe includes pipe 21, pipe 22, and pipe 23. Pipe 21 is horizontally arranged and located at the fifth pipeline station. One end of pipe 21 is used to connect to the connecting pipeline of the corresponding station. The pipes are set vertically. Pipe 22 is located at the fifth pipe station and is connected to pipe 21. Pipe 23 is set vertically and is located at the sixth pipe station. Pipe 23 is connected to the second interface. The reversing valve core has a first connecting groove and a second connecting groove. The first connecting groove is used to connect pipe 12 with pipe 13, and the second connecting groove is used to connect pipe 22 with pipe 23. The extension direction of the first connecting groove is perpendicular to the extension direction of the second connecting groove. When the first connecting groove is supplied with lubricating oil, the side wall of the switching valve core is blocked to pipe 22. When the second connecting groove is supplied with lubricating oil, the side wall of the switching valve core is blocked to pipe 12.

[0011] By adopting the above technical solution, a first and second connecting groove with mutually perpendicular extending directions are set on the reversing valve core. This mechanically achieves interlocking of the two connecting grooves, ensuring that they cannot be simultaneously connected. This eliminates the risk of malfunctions during reversing due to simultaneous dual-path oil supply or return, significantly improving the reliability of the reversing action and effectively avoiding system failures caused by reversing malfunctions. Furthermore, both the first and second branch pipes adopt a multi-pipe segmented structure design. This structure perfectly adapts to the modular layout of six pipeline positions, allowing all oil circuits to be orthogonally arranged along the axial and radial directions of the valve body. Each segmented pipe precisely corresponds to an independent pipeline position, and the wall thickness between the oil circuits is uniform. The uniform and consistent design minimizes localized stress concentration under high-pressure conditions, significantly enhancing the structural strength and fatigue resistance of the valve body. Furthermore, all branch pipes are arranged vertically or horizontally along the pipeline position, allowing for one-time machining from the end face and side of the valve body using conventional drilling processes. This eliminates the need for complex precision casting processes to create internal oblique holes or irregularly shaped oil passages, improving the machining accuracy and consistency of the oil passages while significantly reducing the machining difficulty and production cost of the valve body. This makes it more suitable for large-scale industrial production. Additionally, this orthogonal structure allows the connecting grooves on the directional valve core to directly connect adjacent vertical pipes without requiring additional transition oil passages, further simplifying the structure of the directional valve core and reducing potential failure points.

[0012] Optionally, the switching valve core is provided with a first connecting hole and a second connecting hole. The first connecting hole is located at the third pipeline station, and the second connecting hole is located at the fourth pipeline station. The first connecting hole and the second connecting hole are parallel to each other, and the first connecting hole and the connecting hole are perpendicular to each other. The first return oil pipeline includes a 3-1 pipe, a 3-2 pipe, and a first branch pipe. The 3-1 pipe is vertically arranged and located at the third pipeline station. The 3-2 pipe is horizontally arranged and located at the third pipeline station. The 3-2 pipe is connected to the 3-1 pipe. One end of the first branch pipe is used to connect to the first connecting hole, and the two branch ends of the first branch pipe are respectively connected to the return oil port and the oil outlet port. The second return oil pipeline includes a 4-1 pipe, a 4-2 pipe, and a second branch pipe. The four-one pipe is vertically arranged and located at the fourth pipeline station. The four-two pipe is horizontally arranged and located at the fourth pipeline station. The four-two pipe is connected to the four-one pipe. One end of the second branch pipe is used to connect with the second connecting hole. The two branch ends of the second branch pipe are connected to the oil return port and the oil outlet port, respectively. The switching valve core has a first return channel and a second return channel. The first return channel is used to connect the one-three pipe and the three-one pipe. The second return channel is used to connect the two-three pipe and the four-one pipe. When the first connecting groove of the switching valve core is supplied with lubricating oil, the second return channel is in the state of supplying lubricating oil. When the second connecting groove of the reversing valve core is supplied with lubricating oil, the first return channel is in the state of supplying lubricating oil.

[0013] By adopting the above technical solution, and by setting a first return channel and a second return channel on the reversing valve core that are linked to the oil supply communication groove, precise synchronization of oil supply and return actions is achieved. This ensures that when the first communication groove is open to supply oil to the first interface, the second return channel can simultaneously open to return oil to the second interface, and vice versa. The return oil response is almost without delay, effectively avoiding system pressure buildup, pressure fluctuations, and seal damage caused by untimely return oil. Simultaneously, the two branch ends of the first and second branch pipes are connected to the return port and the outlet port respectively, achieving seamless connection of the manual / automatic oil circuit. In automatic mode, the high-pressure oil from the electric pump is pumped out from the outlet and enters the return oil line through the branch pipe and connection hole to participate in automatic circulation. In manual mode, the oil for manual refueling enters from the filler port and enters the interface through the branch pipe to complete manual oil supply. The two modes share the same interface and return oil system, and mode switching can be achieved without any additional modification to the external pipeline, which greatly improves the versatility and ease of use of the product. In addition, the first and second return oil lines adopt an independent vertical pipe plus horizontal pipe structure, which is completely separated from the high-pressure oil supply line. This avoids mutual interference between high-pressure oil supply and low-pressure oil return, ensures smooth oil return, and reduces the risk of excessive system back pressure caused by poor oil return.

[0014] Optionally, the first diversion pipe includes pipe 51, pipe 52, pipe 53, pipe 54, and pipe 55. Pipe 51 is located at the third pipeline station and is horizontally arranged. Pipe 51 is used to communicate with the first connection hole of the switching valve core. Pipe 52 is vertically arranged and is located at the third pipeline station. Pipe 52 is connected to pipe 51. Pipe 53 is horizontally arranged and is connected to pipe 52. Pipe 54 is vertically arranged and is located at the first pipeline station. One end of pipe 54 is connected to pipe 53, and the other end of pipe 54 is connected to the first interface. One end of pipe 55 is connected to pipe 53, and the other end of pipe 55 is connected to the second interface. Pipe 53 is provided with a first check valve to restrict the backflow of lubricating oil from pipe 54 and pipe 55.

[0015] By adopting the above technical solution, a first check valve is installed on the 53 pipe of the return channel, which effectively restricts the backflow of lubricating oil from the 54 and 55 pipes to the 53 pipe. This ensures that the main pipeline maintains a certain static pressure even when not pressurized, preventing the distributor plunger from retracting due to its own spring force or the reaction force generated by equipment vibration, thus preventing the already pressed-out lubricating oil from being sucked back into the pipeline. This ensures that the actual oil output of each lubrication cycle is accurate and stable, effectively solving the problems of insufficient oil output and poor lubrication effect that are common in traditional non-pressure-holding structures. In addition, the check valve can also effectively absorb the water hammer pressure impact generated during the reversing process, preventing pressure fluctuations from being transmitted to the main pipeline and distributor, ensuring the stability of pressure during the operation of the entire system, and extending the service life of seals and pipelines.

[0016] Optionally, the first anti-reverse component includes two first anti-reverse springs and two first anti-reverse beads. Both ends of the five-three tube are provided with first stepped grooves. The two first anti-reverse springs correspond to the two ends of the five-three tube, and the two first anti-reverse beads correspond to the two first anti-reverse springs. The first anti-reverse beads are slidably connected to the five-three tube, and the first anti-reverse springs are used to keep the corresponding first anti-reverse beads abutting against the side wall of the first stepped groove.

[0017] By adopting the above technical solution, a line contact seal is formed between the steel ball and the stepped groove, resulting in a higher sealing specific pressure. This ensures reliable backflow prevention even under high-pressure operating conditions in a dual-line lubrication system, effectively solving the problem of sealing failure and oil backflow that easily occurs in plate-type check valves under high pressure. Simultaneously, independent backflow springs and balls are installed at both ends of the 5-3 pipe. Backflow from the first port only pushes the left check ball to close the corresponding channel, and backflow from the second port only pushes the right check ball to close the corresponding channel. The backflow prevention actions in the two directions are independent and do not interfere with each other, resulting in a faster backflow response and enabling the closing action to be completed instantly upon backflow. Furthermore, this steel ball-type check valve structure has fewer parts, a simpler structure, lower cost, and a longer service life. Even if a malfunction occurs after long-term use, only the end cap of the valve body needs to be removed for quick replacement of the spring and steel ball, without needing to replace the entire valve body or the backflow channel assembly, significantly reducing equipment maintenance costs and downtime.

[0018] Optionally, the filler port assembly includes an adapter, a quick-connect fitting, and a quick-connect protective sleeve. The adapter is disposed on the valve body and is connected to the first vertical pipeline. The quick-connect fitting is disposed on the adapter, and the quick-connect protective sleeve is fitted onto the quick-connect fitting.

[0019] By adopting the above technical solution, manual emergency refueling only requires aligning the male quick-connect fitting of the refueling nozzle with the female quick-connect fitting on the adapter, eliminating the need for any additional tools such as wrenches. This significantly reduces the operation time for manual emergency refueling and enables rapid restoration of the lubrication system after an electrical control system failure. Simultaneously, the added quick-connect protective sleeve completely covers the release ring of the quick-connect fitting, preventing accidents caused by severe vibrations during equipment operation or accidental contact by workers, which could lead to the release ring being accidentally pressed down and the fitting suddenly detaching. It also effectively seals the connection gap between the male and female fittings, preventing dust, metal shavings, oil, and moisture from entering the fitting and damaging the sealing ring and retaining ring, thus significantly extending the service life of the quick-connect fitting. Furthermore, the adapter can be customized for different manufacturers and specifications of refueling nozzle interfaces without altering the valve body structure, improving the product's versatility and adaptability to different usage scenarios and user habits.

[0020] Optionally, a pressure gauge is provided on the valve body, and the pressure gauge is connected to the third vertical pipeline of the valve body.

[0021] By adopting the above technical solution, and directly connecting the pressure gauge to the third vertical pipeline of the main pipe, real-time visual monitoring of the system's working pressure is achieved. Operators can accurately determine whether the current lubrication amount is sufficient, whether there is blockage in the pipeline, or whether there is a leak in the system by using the pressure gauge reading. This effectively solves the problem of blind operation that relies solely on experience in traditional manual lubrication, significantly improving the accuracy and reliability of manual lubrication. At the same time, the pressure gauge can also serve as an early warning system for faults. When the pressure rises abnormally and exceeds the normal operating range, it indicates that there is a blockage in the pipeline or distributor. When the pressure drops abnormally and cannot establish a normal operating pressure, it indicates that there is a leak in the system. This allows operators to promptly detect and eliminate faults, reducing the risk of equipment friction pairs becoming worn due to insufficient lubrication and major production accidents caused by the continued development of faults.

[0022] Optionally, the valve body is provided with an overflow valve, which is connected to one end of the first horizontal pipeline.

[0023] By adopting the above technical solution, the overflow valve is directly connected to the first horizontal pipeline of the main pipe, providing system-level overpressure safety protection for the entire lubrication system. When the system pressure exceeds the preset safety threshold, the overflow valve can be opened to relieve pressure, allowing excess high-pressure oil to drain back to the oil tank. This prevents excessive system pressure caused by improper operation or pipeline blockage, reducing the probability of safety accidents such as high-pressure oil pipe rupture, pump damage, or damage to lubrication point seals, thus ensuring the safe operation of the system.

[0024] Optionally, the switching valve core is provided with a first grip, and the reversing valve core is provided with a second grip.

[0025] By adopting the above technical solution, independent first and second grips are set on the switching valve core and the reversing valve core respectively, which greatly improves the convenience of manual operation. Operators can easily complete mode switching and oil circuit reversal operations through the grips without the need for any additional tools. The operating force is small and the design is ergonomic, so the operation can be completed smoothly even in harsh working conditions with gloves on.

[0026] In summary, this application includes at least one of the following beneficial technical effects: It realizes the manual and automatic dual-mode operation of the dual-line lubrication switching valve. Under normal working conditions, it can automatically and continuously lubricate, and in case of electrical control failure, it can switch to manual emergency mode, which effectively improves the production continuity and fault tolerance of the equipment. Through structural designs such as mechanical interlock reversing, bidirectional anti-reverse pressure maintenance, synchronous oil return, and overpressure protection, the operational stability and oil supply accuracy of the lubrication system are significantly improved, and the probability of failure is reduced. The modular orthogonal oil circuit layout and standardized quick-connect interface design simplify the valve body processing technology, reduce the installation space requirements, and at the same time reduce the difficulty and cost of equipment operation and maintenance. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the dual-line manual / automatic switching valve assembly.

[0028] Figure 2 yes Figure 1 The cross-sectional view at point AA is used to show the layout diagram of the six piping stations.

[0029] Figure 3 yes Figure 2 The cross-sectional view at point BB is used to show the structural schematic diagram of the refueling pipeline.

[0030] Figure 4 yes Figure 2 The cross-sectional view at point CC shows the switching state of the directional valve spool.

[0031] Figure 5 yes Figure 2 The sectional view at point DD shows the structure of the first piping station.

[0032] Figure 6 yes Figure 2 The sectional view at EE shows the structure of the second piping station.

[0033] Figure 7 yes Figure 2 The sectional view at FF in the middle section is used to show the structure of the third piping station.

[0034] Figure 8 yes Figure 2 The sectional view at point GG shows the structure of the fourth piping station.

[0035] Figure 9 yes Figure 2 The sectional view at HH in the middle section is used to show the structure of the fifth piping station.

[0036] Figure 10 yes Figure 2 The sectional view at point II shows the structure of the sixth piping station.

[0037] Figure 11 yes Figure 5 A schematic diagram of the structure of the first shunt tube.

[0038] Figure 12 yes Figure 5 A schematic diagram of the structure of the second shunt tube.

[0039] Reference numerals: 1. Mounting plate; 11. First interface; 12. Second interface; 13. Oil return port; 14. Oil outlet; 2. Valve body; 21. Relief valve; 22. Pressure gauge; 3. Switching valve core; 31. Connecting hole; 32. Connecting pipeline; 33. First connecting hole; 34. Second connecting hole; 35. First handle; 4. Reversing valve core; 41. First connecting groove; 42. Second connecting groove; 43. First return channel; 44. Second return channel; 45. Second handle; 5. Filler cap assembly; 51. Adapter; 52. Quick-connect fitting; 53. Quick-connect protective sleeve; 61. Main pipe; 611. First vertical pipe; 612. Second vertical pipe; 613. Third vertical pipe; 614. First horizontal pipe; 62. First branch pipe; 621. Pipe 1-1; 622. Pipe 1-2; 623. Pipe 1-3; 63. Second branch pipe; 631. Pipe 2-1; 632. Pipe 2-2; 633. Pipe 2-3; 71. Pipe 3-1; 72. Pipe 3-2; 74. First branch pipe; 741. Pipe 51; 742. Pipe 52; 743. Pipe 53; 744. Pipe 54; 745. Pipe 55; 81. Pipe 41; 82. Pipe 42; 84. Second branch pipe; 841. Pipe 61; 842. Pipe 62; 843. Pipe 63; 844. Pipe 64; 845. Pipe 65; 91. First check valve; 911. First check spring; 912. First check ball; 92. Second check valve; 921. Second check spring; 922. Second check ball. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0041] This application discloses a dual-line manual / automatic switching valve assembly. (Refer to...) Figure 1 and Figure 2A dual-line manual / automatic switching valve assembly includes a mounting plate 1, a valve body 2, a switching valve core 3, a reversing valve core 4, and a filler port assembly 5. The valve body 2 is bolted to the mounting plate 1. The valve body 2 has six pipe positions distributed along its length. A first interface 11 and a second interface 12 are provided on one side of the valve body 2 along its width, and a return port 13 and an outlet port 14 are provided on the other side. The first interface 11 and the return port 13 are located at the first pipe position, and the second interface 12 and the outlet port 14 are located at the sixth pipe position. The first interface 11 and the return port 13 are connected to the return port 14. The first port 11 and the return port 13 are coaxially arranged, and the second port 12 and the oil outlet 14 are coaxially arranged. The axis of the switching valve core 3 is parallel to the length direction of the valve body 2. The switching valve core 3 is rotatably connected to the valve body 2. The side wall of the switching valve core 3 is used to block the connection between the first port 11 and the return port 13, and the second port 12 and the oil outlet 14. The switching valve core 3 is provided with a connecting hole 31 at both the first pipeline station and the second pipeline station. The two connecting holes 31 are parallel to each other. The connecting hole 31 is used to connect the first port 11 and the return port 13 and the second port 12 and the oil outlet 14 at the same time. A first handle 35 is fixedly provided on the switching valve core 3.

[0042] Reference Figure 2 and Figure 3 The valve body 2 is equipped with a refueling pipeline for manual refueling. The refueling pipeline includes a main pipe 61, a first branch pipe 62, and a second branch pipe 63. The main pipe 61 includes a first vertical pipe 611, a second vertical pipe 612, a third vertical pipe 613, and a first horizontal pipe 614. The first vertical pipe 611 is located at the first pipe position, the second vertical pipe 612 is located at the second pipe position, and the third vertical pipe 613 is located at the fifth position. The first horizontal pipe 614 is connected to the first vertical pipe 611, the second vertical pipe 612, and the third vertical pipe 613. The refueling port assembly 5 is fixedly installed on the valve body 2. The first vertical pipeline 611 is connected. The filler port assembly 5 includes an adapter 51, a quick-connect connector 52, and a quick-connect protective sleeve 53. The adapter 51 is connected to the valve body 2 and is connected to the first vertical pipeline 611. A quick-connect female is provided above the adapter 51. The quick-connect connector 52 is connected to the quick-connect female of the adapter 51. The quick-connect protective sleeve 53 is fitted at the connection between the quick-connect connector 52 and the adapter. An overflow valve 21 is provided on the valve body 2. The overflow valve 21 is horizontally positioned and is connected to one end of the first horizontal pipeline 614. A pressure gauge 22 is fixedly provided on the valve body 2 and is connected to the third vertical pipeline 613 of the valve body 2.

[0043] Reference Figure 3 , Figure 4 , Figure 5 as well as Figure 9The switching valve core 3 is equipped with L-shaped connecting pipes 32 at the second and fifth pipeline positions. The first branch pipe 62 includes a first pipe 621, a second pipe 622, and a third pipe 623. The first pipe 621 is horizontally arranged and located at the second pipeline position. The second pipe 622 is vertically arranged and located at the second pipeline position, connected to the first pipe 621. The third pipe 623 is vertically arranged and located at the first pipeline position, connected to the first interface 11. The second branch pipe 63 includes a second pipe 631, a second pipe 632, and a third pipe 623. 33. Pipe 631 is set horizontally and located at the fifth pipeline station. Pipe 632 is set vertically and located at the fifth pipeline station. Pipe 632 is connected to pipe 631. Pipe 633 is set vertically and located at the sixth pipeline station. Pipe 633 is connected to the second interface 12. When the switching valve core 3 cuts off the connection between the first interface 11 and the return port 13 and the second interface 12 and the outlet port 14, one end of pipe 621 is connected to the connecting pipe 32 of the second pipeline station, and one end of pipe 631 is connected to the connecting pipe 32 of the fifth pipeline station.

[0044] Reference Figure 3 and Figure 4 The reversing valve core 4 and the switching valve core 3 are parallel to each other. The reversing valve core 4 is rotatably connected to the valve body 2. A second handle 45 is fixedly provided at one end of the reversing valve core 4. The reversing valve core 4 is provided with a first connecting groove 41 and a second connecting groove 42. The first connecting groove 41 is used to connect the first and second pipes 622 and the first and third pipes 623. The second connecting groove 42 is used to connect the second and second pipes 632 and the second and third pipes 633. The extension direction of the first connecting groove 41 is perpendicular to the extension direction of the second connecting groove 42. When the first connecting groove 41 is supplied with lubricating oil, the side wall of the switching valve core 3 blocks the second pipe 632. When the second connecting groove 42 is supplied with lubricating oil, the side wall of the switching valve core 3 blocks the first and second pipes 622.

[0045] Reference Figure 6 and Figure 7 The switching valve core 3 is provided with a first connecting hole 33 and a second connecting hole 34. The first connecting hole 33 is located at the third pipeline station, and the second connecting hole 34 is located at the fourth pipeline station. The first connecting hole 33 and the second connecting hole 34 are parallel to each other, and the first connecting hole 33 is perpendicular to the connecting hole 31. The valve body 2 is also provided with a first return oil pipeline and a second return oil pipeline. The first return oil pipeline corresponds to the first interface 11, and the second return oil pipeline corresponds to the second interface 12. When the reversing valve core 4 selects any branch pipe to perform an oil discharge operation to the corresponding interface, the return oil pipeline of the other interface performs an oil return operation.

[0046] Reference Figure 5 , Figure 7The first return oil pipeline includes a 31 pipe 71, a 32 pipe 72, and a first branch pipe 74. The 31 pipe 71 is set vertically and is located at the third pipeline station. The 32 pipe 72 is set horizontally and is located at the third pipeline station. The 32 pipe 72 is connected to the 31 pipe. One end of the first branch pipe 74 is used to connect to the first connecting hole 33. The two branch ends of the first branch pipe 74 are connected to the return oil port 13 and the oil outlet 14, respectively.

[0047] Reference Figure 8 , Figure 10 The second return oil pipeline includes a 4-1 pipe 81, a 4-2 pipe 82, and a second branch pipe 84. The 4-1 pipe 81 is vertically arranged and located at the fourth pipeline station. The 4-2 pipe 82 is horizontally arranged and located at the fourth pipeline station. The 4-2 pipe 82 is connected to the 4-1 pipe 81. One end of the second branch pipe 84 is used to connect to the second connecting hole 34. The two branch ends of the second branch pipe 84 are respectively connected to the return oil port 13 and the oil outlet port 14. The reversing valve core 4 has a first return channel 43 and a second return channel 44. The first return channel 43 is used to connect the 1-3 pipe 623 and the 3-1 pipe 71. The second return channel 44 is used to connect the 2-3 pipe 633 and the 4-1 pipe 81. When the first connecting groove 41 of the switching valve core 3 is supplied with lubricating oil, the second return channel 44 is in the state of supplying lubricating oil. When the second connecting groove 42 of the reversing valve core 4 is supplied with lubricating oil, the first return channel 43 is in the state of supplying lubricating oil.

[0048] Reference Figure 10 and Figure 11The first diversion pipe 74 includes pipe 741, pipe 742, pipe 743, pipe 744, and pipe 745. Pipe 741 is located at the third pipeline station and is horizontally arranged. Pipe 741 is used to connect to the first connection hole 33 of the switching valve core 3. Pipe 742 is vertically arranged and is located at the third pipeline station. Pipe 742 is connected to pipe 741. Pipe 743 is horizontally arranged and is connected to pipe 742. Pipe 744 is vertically arranged and is located at the first pipeline station. One end of pipe 744 is connected to pipe 743, and the other end is connected to the first interface 11. Pipe 745 is vertically arranged. 5 is located at the sixth pipe station. One end of the 55 pipe 745 is connected to the 53 pipe 743, and the other end of the 55 pipe 745 is connected to the second interface 12. The 53 pipe 743 is provided with a first anti-reverse component 91 to restrict the backflow of lubricating oil from the 54 pipe 744 and the 55 pipe 745. The first anti-reverse component 91 includes two first anti-reverse springs 911 and two first anti-reverse beads 912. Both ends of the 53 pipe 743 are provided with first stepped grooves. The two first anti-reverse springs 911 correspond to the two ends of the 53 pipe 743, and the two first anti-reverse beads 912 correspond to the two first anti-reverse springs 911. The first anti-reverse beads 912 are slidably connected to the 53 pipe 743. The first anti-reverse springs 911 are used to keep the corresponding first anti-reverse beads 912 abutting against the side wall of the first stepped groove.

[0049] Reference Figure 10 and Figure 12The second diversion pipe 84 includes pipe 841 (61), pipe 842 (62), pipe 843 (63), pipe 844 (64), and pipe 845 (65). Pipe 841 (61) is located at the fourth pipe station and is horizontally arranged. Pipe 841 (63) is used to connect with the second connection hole 34 of the switching valve core 3. Pipe 842 (62) is vertically arranged and located at the fourth pipe station. Pipe 842 (62) is connected to pipe 841 (61). Pipe 843 (63) is horizontally arranged and connected to pipe 842 (62). Pipe 844 (64) is vertically arranged and located at the first pipe station. One end of pipe 844 (64) is connected to pipe 843 (63), and the other end of pipe 844 (64) is connected to the first interface 11. Pipe 845 (65) is vertically arranged. 5 is located at the sixth pipe station. One end of the 65 pipe 845 is connected to the 63 pipe 843, and the other end of the 65 pipe 845 is connected to the second interface 12. The 63 pipe 843 is provided with a second anti-reverse component 92 to restrict the backflow of lubricating oil from the 54 pipe 744 and the 55 pipe 745. The second anti-reverse component 92 includes two second anti-reverse springs 921 and two second anti-reverse beads 922. Both ends of the 63 pipe 843 are provided with second stepped grooves. The two second anti-reverse springs 921 correspond to the two ends of the 63 pipe 843, and the two second anti-reverse beads 922 correspond to the two second anti-reverse springs 921. The second anti-reverse beads 922 are slidably connected to the 63 pipe 843. The second anti-reverse springs 921 are used to keep the corresponding second anti-reverse beads 922 abutting against the side wall of the second stepped groove.

[0050] The implementation principle of a dual-line manual / automatic switching valve assembly in this application embodiment is as follows: This dual-line manual / automatic switching valve assembly relies on the six-position modular oil circuit layout of the valve body 2, and realizes manual / automatic dual-mode switching through the cooperation of the switching valve core 3 and the reversing valve core 4. Combined with independent oil supply and return, bidirectional anti-reverse pressure holding and safety protection structure, it ensures the stable operation of the dual-line lubrication system.

[0051] In automatic lubrication mode, rotating the first handle 35 drives the switching valve core 3 to block the manual oil circuit, while simultaneously connecting the automatic inlet and outlet oil port 13 with the main interface. The medium output by the electric pump enters the return channel through the diverter pipe. When the reversing valve core 4 switches, the first connecting groove 41 is open, so the first interface 11 supplies oil and the second return channel 44 returns oil synchronously. When the second connecting groove 42 is open, the oil circuit is switched in the opposite direction, completing the dual-line alternating reversing lubrication.

[0052] In case of electrical control failure, turn the first handle 35 to switch to manual mode, switch valve core 3 to close the automatic passage, and connect the manual refueling branch pipe through the L-shaped pipeline; external refueling equipment injects the medium into the main pipe 61, and the reversing valve core 4 selectively opens one branch pipe for oil supply, while the other branch returns oil synchronously, realizing emergency lubrication without electrical control. The two sets of return channels have built-in spring steel ball bidirectional check structure to maintain pipeline pressure and prevent medium backflow; the reversing valve core 4 has vertically staggered connecting grooves to realize single-path conduction interlocking and avoid oil circuit disorder; pressure gauge 22 monitors oil pressure in real time, and overflow valve 21 automatically releases pressure when overpressure occurs; the refueling port adopts a quick-connect combination structure to achieve quick tool-free connection and protection.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-line manual / automatic switching valve assembly, characterized in that: The system includes a mounting plate (1), a valve body (2), a switching valve core (3), a reversing valve core (4), and a filler assembly (5). The valve body (2) is mounted on the mounting plate (1). A first interface (11) and a second interface (12) are provided on one side of the valve body (2). A return port (13) and an outlet port (14) are provided on one side of the valve body (2). The switching valve core (3) is rotatably connected inside the valve body (2). The switching valve core (3) is used to simultaneously cut off the connection between the first interface (11) and the return port (13) and the second interface (12) and the outlet port (14). The switching valve core (3) has two connecting holes (31). The two connecting holes (31) are used to simultaneously connect the first interface (11) and the return port (13) and the second interface (12) and the outlet port (14). The valve body (2) is equipped with a refueling pipeline, which includes a main pipe (61), a first branch pipe (62) and a second branch pipe (63). The refueling port assembly (5) is installed on the valve body (2) and is used to block the main pipe (61). The first branch pipe (62) and the second branch pipe (63) are both connected to the main pipe (61). The first branch pipe (62) is used to communicate with the first interface (11), and the second branch pipe (63) is used to communicate with the second interface (12). The valve body (2) is also equipped with a first return oil pipeline and a second return oil pipeline. The first return oil pipeline corresponds to the first interface (11), and the second return oil pipeline corresponds to the second interface (12). When the reversing valve core (4) selects any branch pipe to perform an oil discharge operation to the corresponding interface, the return oil pipeline of the other interface performs an oil return operation.

2. The dual-line manual / automatic switching valve assembly according to claim 1, characterized in that: The valve body (2) has six pipe positions distributed along its length. The first interface (11) and return port (13) are located at the first pipe position, and the second interface (12) and outlet port (14) are located at the sixth pipe position. The main pipe (61) includes a first vertical pipe (611), a second vertical pipe (612), a third vertical pipe (613), and a first horizontal pipe (614). The first vertical pipe (611) is located at the first pipe position, the second vertical pipe (612) is located at the second pipe position, and the third vertical pipe (613) is located at the fifth position. The first horizontal pipe (614) is connected to the first vertical pipe (611), the second vertical pipe (612), and the third vertical pipe (613). 12) and the third vertical pipeline (613) are connected. The oil filling port assembly (5) is connected to the first vertical pipeline (611). The switching valve core (3) is provided with an L-shaped connecting pipeline (32) at the second pipeline station and the fifth pipeline station. When the switching valve core (3) cuts off the connection between the first interface (11) and the return oil port (13) and the second interface (12) and the oil outlet (14), the second vertical pipeline (612) and the third vertical pipeline (613) are connected to the two connecting pipelines (32) respectively. The first branch pipe (62) and the second branch pipe (63) are connected to the two connecting pipes respectively. The reversing valve core (4) is used to cut off the connection between any branch pipe and the corresponding interface.

3. The dual-line manual / automatic switching valve assembly according to claim 2, characterized in that: The first branch pipe (62) includes a first pipe (621), a second pipe (622), and a third pipe (623). The first pipe (621) is horizontally arranged and located at the second pipeline station. One end of the first pipe (621) is used to connect to the connecting pipe (32) of the corresponding station. The second pipe (622) is vertically arranged and located at the second pipeline station. The second pipe (622) is connected to the first pipe (621). The first three-pipe (623) is vertically installed and located at the first pipeline station. The first three-pipe (623) is connected to the first interface (11). The second branch pipe includes the second one-pipe (631), the second two-pipe (632), the second three-pipe (633), and the second one-pipe (631) is horizontally installed. The second one-pipe (631) is located at the fifth pipeline station. One end of the second one-pipe (631) is used to connect to the connecting pipe (32) of the corresponding station. The second two-pipe (631) is vertically installed and located at the first pipeline station. The second three-pipe (632) is connected to the first interface (11). 632) Vertically installed, the second pipe (632) is located at the fifth pipe station, and the second pipe (632) is connected to the first pipe (631). The third pipe (633) is vertically installed, and the third pipe (633) is located at the sixth pipe station, and the third pipe (633) is connected to the second interface (12). The reversing valve core (4) is provided with a first connecting groove (41) and a second connecting groove (42). The first connecting groove (41) is used for the connection between the first pipe (622) and the first... The three pipes (623) are connected. The second connecting groove (42) is used to connect the second pipe (632) and the third pipe (633). The extension direction of the first connecting groove (41) is perpendicular to the extension direction of the second connecting groove (42). When the first connecting groove (41) is supplied with lubricating oil, the side wall of the switching valve core (3) is blocked to block the second pipe (632). When the second connecting groove (42) is supplied with lubricating oil, the side wall of the switching valve core (3) is blocked to block the first pipe (622).

4. The dual-line manual / automatic switching valve assembly according to claim 3, characterized in that: The switching valve core (3) is provided with a first connecting hole (33) and a second connecting hole (34). The first connecting hole (33) is located at the third pipeline station, and the second connecting hole (34) is located at the fourth pipeline station. The first connecting hole (33) and the second connecting hole (34) are parallel, and the first connecting hole (33) and the connecting hole (31) are perpendicular to each other. The first return oil pipeline includes a three-way pipe (71), a three-way pipe (72), and a first branch pipe (74). The three-way pipe (71) is set vertically. The 31 pipe (71) is located at the third pipeline station, the 32 pipe (72) is horizontally set, the 32 pipe (72) is located at the third pipeline station, the 32 pipe (72) is connected to the 31 pipe (71), one end of the first branch pipe (74) is used to connect to the first connecting hole (33), the two branch ends of the first branch pipe (74) are connected to the return oil port (13) and the oil outlet (14) respectively, the second return oil pipeline includes the 41 pipe (81), the 42 pipe (82) and the second branch pipe (84), so The 41 pipe (81) is vertically installed and located at the fourth pipeline station. The 42 pipe (82) is horizontally installed and located at the fourth pipeline station. The 42 pipe (82) is connected to the 41 pipe (81). One end of the second branch pipe (84) is used to connect to the second connection hole (34). The two branch ends of the second branch pipe (84) are connected to the return port (13) and the outlet port (14) respectively. The reversing valve core (4) has a first return channel (43) and a second... The return channel (44) is used for connecting the first three pipe (623) and the third one pipe (71), and the second return channel (44) is used for connecting the second three pipe (633) and the fourth one pipe (81). When the first connecting groove (41) of the switching valve core (3) is supplied with lubricating oil, the second return channel (44) is in the state of supplying lubricating oil. When the second connecting groove (42) of the reversing valve core (4) is supplied with lubricating oil, the first return channel (43) is in the state of supplying lubricating oil.

5. A dual-line manual / automatic switching valve assembly according to claim 4, characterized in that: The first diversion pipe (74) includes a 51 pipe (741), a 52 pipe (742), a 53 pipe (743), a 54 pipe (744), and a 55 pipe (745). The 51 pipe (741) is located at the third pipeline station and is horizontally arranged. The 51 pipe (741) is used to communicate with the first connection hole (33) of the switching valve core (3). The 52 pipe (742) is vertically arranged and is located at the third pipeline station. The 52 pipe (742) is connected to the 51 pipe (741). The 53 pipe (743) is horizontally arranged. (743) is connected to the 52 pipe (742), the 54 pipe (744) is set vertically, the 54 pipe (744) is located at the first pipe station, one end of the 54 pipe (744) is connected to the 53 pipe (743), the other end of the 54 pipe (744) is connected to the first interface (11), one end of the 55 pipe (745) is connected to the 53 pipe (743), the other end of the 55 pipe (745) is connected to the second interface (12), and the 53 pipe (743) is provided with a first check valve (91) to restrict the backflow of lubricating oil from the 54 pipe (744) and the 55 pipe (745).

6. The dual-line manual / automatic switching valve assembly according to claim 5, characterized in that: The first anti-reverse component (91) includes two first anti-reverse springs (911) and two first anti-reverse beads (912). Both ends of the five-three tube (743) are provided with first stepped grooves. The two first anti-reverse springs (911) correspond to the two ends of the five-three tube (743), and the two first anti-reverse beads (912) correspond to the two first anti-reverse springs (911). The first anti-reverse beads (912) are slidably connected to the five-three tube (743). The first anti-reverse springs (911) are used to keep the corresponding first anti-reverse beads (912) abutting against the side wall of the first stepped groove.

7. A dual-line manual / automatic switching valve assembly according to claim 2, characterized in that: The filler port assembly (5) includes an adapter (51), a quick-connect connector (52), and a quick-connect protective sleeve (53). The adapter (51) is disposed on the valve body (2) and is connected to the first vertical pipeline (611). The quick-connect connector (52) is disposed on the adapter (51), and the quick-connect protective sleeve (53) is sleeved on the quick-connect connector (52).

8. A dual-line manual / automatic switching valve assembly according to claim 2, characterized in that: A pressure gauge (22) is provided on the valve body (2), and the pressure gauge (22) is connected to the third vertical pipe (613) of the valve body (2).

9. A dual-line manual / automatic switching valve assembly according to claim 2, characterized in that: An overflow valve (21) is provided on the valve body (2), and the overflow valve (21) is connected to one end of the first horizontal pipeline (614).

10. A dual-line manual / automatic switching valve assembly according to claim 1, characterized in that: The switching valve core (3) is provided with a first grip (35), and the reversing valve core (4) is provided with a second grip (45).

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