6-drift-diameter PA type sandwich valve
By designing a 6-port PA type stacked valve, adopting an asynchronous control structure and plug design, the protection and control problems of the stacked valve under complex working conditions are solved, improving the safety and control accuracy of the system.
Patent Information
- Application Number
- CN202520800317.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-25
AI Technical Summary
Existing stacked valves lack active protection mechanisms when used with precision control valves such as servo valves and proportional valves. The synchronous control logic is difficult to adapt to complex working conditions. Turbulent flow of oil at port A can easily cause cavitation and pressure loss. Emergency protection functions rely on a single port.
A 6-port PA-type stacked valve is designed, which adopts an asynchronous control structure. The P port and A port are independently controlled by the first and second solenoid valves. Combined with the plug structure, the selective blocking and protection of the oil circuit can be achieved, thereby enhancing the system safety and control accuracy.
It achieves selective blocking and protection of the oil circuit, improves the system's flexibility and safety, avoids the impact of hydraulic oil on precision valves, and reduces cavitation and pressure loss caused by turbulence.
Smart Images
Figure CN223894593U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stacked valve technology, and in particular to a 6-port PA type stacked valve. Background Technology
[0002] The 6-port PA type stack valve is a stacked hydraulic valve specially designed according to the needs of hydraulic systems. Its main function is to be installed at the bottom of a 6-port servo valve, proportional valve, or solenoid directional valve, and to achieve functions such as selection, blocking, and protection for the servo valve, proportional valve, or solenoid directional valve through stacking.
[0003] As hydraulic systems develop towards integration and high precision, stack valves, as a core component for tubeless connections, are widely used in engineering machinery, CNC machine tools, and testing equipment. While traditional stack valve technology has achieved modular installation and functional integration, some problems remain. Existing stack valves, when used with precision control valves such as servo valves and proportional valves, generally lack active protection mechanisms; the P and A ports of traditional stack valves often employ synchronous control logic, making it difficult to adapt to complex operating conditions; the emergency protection function of existing stack valves often relies on the closure of a single port, while port A may still experience pressure shocks due to oil backflow or actuator inertial motion; although stack valves have achieved standardized bore diameters, this varies depending on the controlled object; and the cast oil passages of traditional stack valves often use a straight-through structure, making port A prone to cavitation and pressure loss due to oil turbulence.
[0004] This patent addresses the aforementioned issues by proposing a 6-port PA-type superimposed valve that integrates gate selection, blocking, and multiple protection functions. Through structural innovation and control logic optimization, it improves system safety and control accuracy. Utility Model Content
[0005] This invention addresses the shortcomings of existing technologies by developing a 6-port PA type stacked valve, which allows for selection of the oil path, on-demand blocking and protection, and asynchronous control, thus improving the flexibility of use.
[0006] The technical solution of this utility model to solve the technical problem is as follows: a 6-port PA type stacked valve, including a valve body, a P port, a T port, an A port and a B port. The P port, T port, A port and B port are disposed on the valve body. The P port is connected to the oil inlet, the T port is connected to the oil outlet, the A port is connected to oil line A, and the B port is connected to oil line B. Both the oil inlet and oil line A are provided with flow regulating elements. A control element is connected to the side of the valve body away from the P port in the vertical projection direction. The control element and the valve body are connected by a connector.
[0007] Preferably, the flow regulating element in the oil inlet line is a first solenoid valve, which is mounted on the valve body.
[0008] Preferably, the flow regulating element on the oil circuit A is a second solenoid valve, which is mounted on the valve body.
[0009] Preferably, both the oil inlet and oil line A are U-shaped, and the first solenoid valve and the second solenoid valve are respectively installed at the U-shaped corners of the oil inlet and oil line A. The first solenoid valve and the second solenoid valve can be controlled independently, forming an asynchronous opening and closing control structure between port P and port A.
[0010] Preferably, the oil inlet is provided with a branch, which is connected to the working port, and the working port is threadedly connected with a plug.
[0011] Preferably, the oil circuit A is provided with a branch, which is connected to the working port, and the working port is threadedly connected with a plug.
[0012] Preferably, the oil inlet and the branch of oil line A are each provided with two, and the working port is provided with two.
[0013] The effects provided in the utility model description are merely those of the embodiments, and not all the effects of the utility model. The above technical solution has the following advantages or beneficial effects:
[0014] 1. This utility model can realize oil circuit selection, real-time blocking and protection. Oil circuit selection is mainly handled by the P port, and blocking can be handled by the P port or the A port or both. The blocking and protection functions are mainly handled by the P port and the A port.
[0015] 2. It is easy to use as it connects to the control elements via connectors;
[0016] 3. The oil circuit is opened or closed by a solenoid valve, which provides stable performance and rapid response;
[0017] 4. The first and second solenoid valves can be controlled asynchronously, improving the flexibility of use;
[0018] 5. By setting multiple working ports and using plugs, the appropriate working port can be selected according to actual needs, making it convenient to use. Attached Figure Description
[0019] Figure 1 This is the front view of the present invention;
[0020] Figure 2 The overall structure of this utility model Figure 1 ;
[0021] Figure 3 The overall structure of this utility model Figure 2 ;
[0022] Figure 4This is a bottom view of the present invention;
[0023] Figure 5 for Figure 4 A cross-sectional view along the AA direction;
[0024] Figure 6 for Figure 4 Cross-sectional view along the BB direction;
[0025] Figure 7 for Figure 4 A cross-sectional view along the CC direction.
[0026] Wherein: 1. Valve body; 101. Control element; 2. P port; 21. Oil inlet; 211. First solenoid valve; 3. T port; 31. Oil outlet; 4. A port; 41. Oil circuit A; 411. Second solenoid valve; 5. B port; 51. Oil circuit B; 6. Plug; 7. Connector; 8. Working port; 81. Branch circuit. Detailed Implementation
[0027] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.
[0028] Example 1
[0029] See Figures 1 to 7 A 6-port PA type stacked valve includes a valve body 1, a P port 2, a T port 3, an A port 4, and a B port 5. The P port 2, T port 3, A port 4, and B port 5 are disposed on the valve body 1. The P port 2 is connected to the oil inlet passage 21, the T port 3 is connected to the oil outlet passage 31, the A port 4 is connected to the oil passage A41, and the B port 5 is connected to the oil passage B51. Both the oil inlet passage 21 and the oil passage A41 are provided with flow regulating elements. A control element 101 is connected to the side of the valve body 1 away from the P port 2 in the vertical projection direction. The control element 101 and the valve body 1 are connected by a connector 7. The connector 7 is an existing connector 7, such as a bolt and nut. The control element 101 is a servo valve, a proportional valve, or a solenoid directional valve.
[0030] Preferably, the flow regulating element on the oil inlet 21 is a first solenoid valve 211, which is mounted on the valve body 1.
[0031] Preferably, the flow regulating element on the oil circuit A41 is a second solenoid valve 411, which is mounted on the valve body 1. The first solenoid valve 211 and the second solenoid valve 411 can be proportional solenoid valves.
[0032] Preferably, both the oil inlet 21 and the oil passage A41 are U-shaped. The first solenoid valve 211 and the second solenoid valve 411 are respectively installed at the U-shaped corners of the oil inlet 21 and the oil passage A41. The first solenoid valve 211 and the second solenoid valve 411 can be controlled independently, forming an asynchronous opening and closing control structure of port P2 and port A4.
[0033] Preferably, the oil inlet passage 21 is provided with a branch passage 81, which is connected to the working port 8, and a threaded plug 6 is threadedly connected to the working port 8.
[0034] Preferably, the oil circuit A41 is provided with a branch 81, which is connected to the working port 8, and the working port 8 is threadedly connected with a plug 6.
[0035] Preferably, two branches 81 are provided for both the oil inlet 21 and the oil line A41, and two working ports 8 are provided for each.
[0036] Working principle
[0037] The 6-bore PA type stacked valve mainly consists of a valve body 1, a P port 2, a T port 3, an A port 4, a B port 5, a flow regulating element, and a control element 101. The valve body 1, as the core load-bearing component, has the P port 2 connected to the inlet oil passage 21, the T port 3 connected to the outlet oil passage 31, the A port 4 connected to oil passage A41, and the B port 5 connected to oil passage B51. Both the inlet oil passage 21 and oil passage A41 are equipped with flow regulating elements to control the flow rate of the hydraulic oil. The control element 101 is connected to the side of the valve body 1 furthest from the P port 2 in the vertical projection direction. The two are securely connected by existing connecting parts 7 such as bolts and nuts, ensuring that the control element 101 can effectively control the internal oil passages of the valve body 1.
[0038] The oil inlet passage 21 and oil passage A41 are designed in a U-shape. The first solenoid valve 211 is installed at the U-shaped corner of the oil inlet passage 21, and the second solenoid valve 411 is installed at the U-shaped corner of the oil passage A41. The selection of the U-shaped corner positions allows the solenoid valves to more accurately control the on / off state of the oil passage, while also facilitating installation and maintenance. In addition, both the oil inlet passage 21 and oil passage A41 are provided with two branches 81, each branch 81 connecting to the working port 8. The working port 8 is connected to a plug 6 via a threaded drive. This design allows the branches 81 to be opened or closed according to actual needs, increasing the flexibility and applicability of the stacked valve.
[0039] When the test begins, external hydraulic oil first reaches port P2 of the 6-way stacked valve. At this time, the inlet circuit 21 is closed because the first solenoid valve 211 on the inlet circuit 21 is not energized, and the valve core is in the initial position blocking the oil passage. When the first solenoid valve 211 is energized, the electromagnet generates magnetic force, driving the valve core to move, thereby opening port P2, allowing hydraulic oil to flow through the upper port P2 to port P2 of the servo valve, proportional valve, or solenoid directional valve. After receiving a control signal (such as a servo control signal, proportional control signal, or energizing signal), the servo valve, proportional valve, or solenoid directional valve opens port A4. At this time, the upper port A4 of the stacked valve is closed because the second solenoid valve 411 on the oil circuit A41 is not energized. When the second solenoid valve 411 is energized, similarly, the solenoid valve opens port A4, and hydraulic oil reaches the actuator cylinder through the lower port A4 of the stacked valve, pushing the cylinder piston to move and complete the required action of the test. When the test ends, the relevant valve ports need to be closed. First, the power supply to the first solenoid valve 211 and the second solenoid valve 411 is cut off, and ports P2 and A4 are closed. With port P2 closed, external hydraulic oil cannot enter the servo valve, proportional valve, or solenoid directional valve, preventing hydraulic oil from impacting these precision valve components and providing protection. Closing port A4 blocks the flow of hydraulic oil, preventing the hydraulic oil in the actuator cylinder from returning to the servo valve and other components, thus keeping the cylinder piston in its original position.
[0040] In case of emergency, the power supply to the first solenoid valve 211 and the second solenoid valve 411 can be quickly cut off, causing port P2 and port A4 to close urgently. This not only prevents external hydraulic oil from impacting the servo valve, but also prevents the backflow of hydraulic oil in the actuator cylinder, providing comprehensive protection for the servo valve, proportional valve, solenoid directional valve, actuator cylinder, and the entire hydraulic system.
[0041] Detailed operating procedures
[0042] Power on: Power on the entire hydraulic system and the control element 101 of the stacked valve to ensure that all components are in standby mode.
[0043] Open port P2: Energize the first solenoid valve 211 on the oil inlet circuit 21. The electromagnet of the first solenoid valve 211 actuates, pushing the valve core to move and opening port P2. At this time, external hydraulic oil enters the stack valve from the lower port P2 and flows to the port P2 of the servo valve, proportional valve, or solenoid directional valve through the upper port P2.
[0044] Open Port A4: According to test requirements, apply a control signal (such as a servo control signal, proportional control signal, or energizing signal) to the servo valve, proportional valve, or solenoid directional valve to open Port A4. Energize the second solenoid valve 411 on oil circuit A41. The second solenoid valve 411 actuates, opening Port A4. Hydraulic oil flows out from Port A4 of the servo valve, etc., enters the upper Port A4 of the stacked valve, and then flows through the lower Port A4 to the actuator cylinder, driving the cylinder piston to complete the corresponding action.
[0045] During the test, P port 2 and A port 4 can be controlled synchronously or asynchronously according to actual needs. In synchronous control, the first solenoid valve 211 and the second solenoid valve 411 are simultaneously energized or de-energized to realize the synchronous opening or closing of P port 2 and A port 4; in asynchronous control, the first solenoid valve 211 or the second solenoid valve 411 can be controlled independently to flexibly adjust the on / off sequence and time of hydraulic oil.
[0046] After the test, firstly, the power supply to the second solenoid valve 411 is cut off. The second solenoid valve 411 resets, closing port A4, blocking the flow of hydraulic oil to the actuator cylinder, causing the cylinder piston to stop moving and maintain its current position. Then, port P2 is closed: the power supply to the first solenoid valve 211 is cut off, the first solenoid valve 211 resets, closing port P2, preventing external hydraulic oil from continuing to enter the servo valve and other components, and avoiding hydraulic oil impact. Finally, the power supply to the entire system is turned off to ensure equipment safety.
[0047] In case of emergency (such as equipment failure, abnormal vibration, oil leakage, etc.), the power supply to the first solenoid valve 211 and the second solenoid valve 411 should be cut off, so that port P2 and port A4 are closed simultaneously to stop the flow of hydraulic oil.
[0048] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Based on the technical solution of the present utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the present utility model.
Claims
1. A 6-bore PA type stacked valve, characterized in that: The valve body includes a valve body (1), a P port (2), a T port (3), an A port (4), and a B port (5). The P port (2), T port (3), A port (4), and B port (5) are located on the valve body (1). The P port (2) is connected to the oil inlet (21), the T port (3) is connected to the oil outlet (31), the A port (4) is connected to the oil line A (41), and the B port (5) is connected to the oil line B (51). Both the oil inlet (21) and the oil line A (41) are equipped with flow regulating elements. A control element (101) is connected to the side of the valve body (1) away from the P port (2) in the vertical projection direction. The control element (101) and the valve body (1) are connected by a connector (7).
2. The 6-bore PA type stacked valve according to claim 1, characterized in that, The flow regulating element on the oil inlet (21) is a first solenoid valve (211), which is installed on the valve body (1).
3. A 6-bore PA type stacked valve according to claim 2, characterized in that, The flow regulating element on the oil circuit A (41) is the second solenoid valve (411), which is installed on the valve body (1).
4. A 6-port PA type stacked valve according to claim 3, characterized in that, Both the oil inlet (21) and oil line A (41) are U-shaped. The first solenoid valve (211) and the second solenoid valve (411) are respectively installed at the U-shaped corners of the oil inlet (21) and oil line A (41). The first solenoid valve (211) and the second solenoid valve (411) can be controlled independently to form an asynchronous opening and closing control structure of port P (2) and port A (4).
5. A 6-bore PA type stacked valve according to claim 1, characterized in that, The oil inlet passage (21) is provided with a branch passage (81), which is connected to the working port (8). The working port (8) is connected to a threaded plug (6).
6. A 6-bore PA type stacked valve according to claim 5, characterized in that, The oil circuit A (41) is provided with a branch (81), which is connected to the working port (8). The working port (8) is threadedly connected with a plug (6).
7. A 6-bore PA type stacked valve according to claim 6, characterized in that, The oil inlet (21) and the branch (81) of oil line A (41) are each provided with two branches, and the working port (8) is provided with two working ports.