Plug-in valve with buffering function

Abstract

The utility model provides a kind of plug-in valve with buffering function, when the valve core of reversing valve is in first position, second valve port is connected with third valve port, second interface is connected with third interface through second valve port and third valve port, so that plug-in valve core is blocked between first interface and second interface. When the valve core of reversing valve is in second position, third valve port is connected with fourth valve port, third interface is connected with the inlet of one-way throttle valve through third valve port and fourth valve port, so that first interface and second interface are connected through the gap between plug-in valve core and plug-in valve body. The problem that plug-in valve is easy to produce impact when opening and closing in prior art, and further lead to pipeline element wear, noise and pressure fluctuation is solved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control valves, and in particular to a cartridge valve with a buffer function. Background Technology

[0002] Cartridge valves are modular, pilot-controlled seated hydraulic components that are installed by "inserting" into a valve block to achieve directional, pressure, flow, or multiple combined control functions. Due to their advantages such as large flow capacity, good sealing, and ease of integration, cartridge valves are widely used in high-flow hydraulic systems. The control cover is the core control component of a cartridge valve, used to install the pilot valve and control the opening and closing of the cartridge valve core. Currently, conventional cartridge valve control covers mainly achieve rapid opening and closing of the cartridge valve core by controlling the on / off state of the pilot oil circuit. However, this simple on / off control can cause significant problems under high flow or high pressure differential conditions: First, opening impact: At the moment the valve core opens, pressurized oil rapidly fills the upper chamber of the main valve core, causing the valve core to open rapidly, which may cause pressure shock in downstream pipelines (water hammer phenomenon), generating vibration and noise. Second, closing impact: At the moment the valve core closes, under the action of spring force and oil pressure, it quickly sits down, causing a strong mechanical impact with the valve sleeve or valve seat, leading to wear, noise, or even damage, affecting the component's lifespan. Third, poor system stability: drastic changes in flow rate can cause system pressure fluctuations, affecting the stability and control accuracy of the entire hydraulic system.

[0003] It is evident that existing technologies suffer from the problem of impacts that easily occur when cartridge valves open and close, leading to wear of pipeline components, noise, and pressure fluctuations. Utility Model Content

[0004] This invention provides a cartridge valve with a buffer function, which solves the problem in the prior art that cartridge valves are prone to impact when opening and closing, leading to wear of pipeline components, noise, and pressure fluctuations.

[0005] This utility model provides a cartridge valve with a buffer function, including a cartridge valve core, a cartridge valve body, a reversing valve, and a one-way throttle valve.

[0006] The cartridge valve core is located in the cartridge valve body, which has a first interface, a second interface, and a third interface; the directional valve has a first valve port, a second valve port, a third valve port, and a fourth valve port.

[0007] The first valve port is connected to the drive source to drive the valve core of the directional valve to move between the first position and the second position. The second port is connected to the second valve port. The third valve port is connected to the third port of the cartridge valve. The fourth valve port is connected to the inlet of the one-way throttle valve.

[0008] When the valve core of the reversing valve is in the first position, the second valve port is connected to the third valve port, and the second interface is connected to the third interface through the second valve port and the third valve port, so that the cartridge valve core is sealed between the first interface and the second interface.

[0009] When the valve core of the reversing valve is in the second position, the third valve port is connected to the fourth valve port, and the third interface is connected to the inlet of the one-way throttle valve through the third valve port and the fourth valve port, so that the first interface and the second interface are connected through the gap between the cartridge valve core and the cartridge valve body.

[0010] Optionally, a first valve damper is provided between the second interface and the second valve port.

[0011] Optionally, the first valve damping is a damping orifice with a diameter of 1.2 mm.

[0012] Optionally, a second valve damper is provided between the third interface and the third valve port.

[0013] Optionally, the second valve damping is a damping orifice with a diameter of 0.6 mm.

[0014] Optionally, a third valve damping is provided between the first valve port and the drive source.

[0015] Optionally, the third valve damping is a damping orifice with a diameter of 1.2 mm.

[0016] Optionally, the axial direction of the cartridge valve body is the first direction, and the axial direction of the directional valve is the second direction, with the first direction perpendicular to the second direction.

[0017] Optionally, the directional valve is provided with a first spring, one end of which abuts against the valve core of the directional valve, and the other end of which abuts against the inner wall of the valve body of the directional valve away from the first valve port.

[0018] Optionally, a second spring is provided in the cartridge valve body, with the first end of the second spring abutting against one end of the cartridge valve core and the second end of the second spring abutting against the inner wall of the cartridge valve body away from the first interface.

[0019] The advantages of this utility model compared to the prior art are as follows:

[0020] 1. This utility model adds a reversing valve and a one-way throttle valve to the traditional cartridge valve control oil circuit. The opening and closing of the reversing valve and the one-way throttle valve make the cartridge valve core move slowly in the cartridge valve body cavity, thereby ensuring that the control pressure is stable when the cartridge valve is open, and also ensuring that the control flow is controlled when opening and closing.

[0021] 2. This utility model efficiently integrates the buffer function with the standard cartridge valve control cover. Within the limited space inside the control cover, a one-way throttle valve and a damping network are rationally arranged, which further improves the impact resistance of the cartridge valve when opening and closing, alleviates the system pressure fluctuation caused by flow changes during opening and closing, and improves the stability and control accuracy of the entire hydraulic system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a cartridge valve with a buffer function according to an embodiment of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of a cartridge valve with a buffer function according to an embodiment of the present invention. Figure 1 ;

[0024] Figure 3 This is a three-dimensional structural diagram of a cartridge valve with a buffer function according to an embodiment of the present invention. Figure 2 .

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Cartridge valve with buffer function;

[0027] 11. Cartridge valve core;

[0028] 12. Cartridge valve body; 120. Clearance; 121. First port; 122. Second port; 123. Third port; 13. Directional valve; 130. Valve core; 131. First valve port; 132. Second valve port; 133. Third valve port; 134. Fourth valve port;

[0029] 14. One-way throttle valve; 141. Inlet; 142. Drain port;

[0030] 151. First valve damper; 152. Second valve damper; 153. Third valve damper; 154. First spring; 155. Second spring. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0032] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0034] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0035] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0037] This utility model provides a cartridge valve 1 with a buffer function. Please refer to [link / reference]. Figures 1-3 It includes a cartridge valve core 11, a cartridge valve body 12, a directional valve 13, and a one-way throttle valve 14.

[0038] The cartridge valve core 11 is disposed inside the cartridge valve body 12, which has a first port 121, a second port 122, and a third port 123. The directional valve 13 has a first valve port 131, a second valve port 132, a third valve port 133, and a fourth valve port 134.

[0039] The first valve port 131 is connected to a drive source (such as a hydraulic oil source) to drive the valve core of the directional valve 13 to move between a first position and a second position. The second port 122 is connected to the second valve port 132, the third valve port 133 is connected to the third port 123 of the cartridge valve, and the fourth valve port 134 is connected to the inlet 141 of the one-way throttle valve 14.

[0040] When the valve core 130 of the reversing valve 13 is in the first position, such as Figure 1 As shown, the second valve port 132 is connected to the third valve port 133, and the second interface 122 is connected to the third interface 123 through the second valve port 132 and the third valve port 133, so that the cartridge valve core 11 is sealed between the first interface 121 and the second interface 122.

[0041] When the valve core 130 of the reversing valve 13 is in the second position, for example, when the valve core 130 moves to the right so that its two ends are connected to the third valve port 133 and the fourth valve port 134 respectively, the third valve port 133 is connected to the fourth valve port 134 through the valve core 130. At this time, the third interface 123 is connected to the inlet 141 of the one-way throttle valve 14 through the third valve port 133 and the fourth valve port 134, so that the first interface 121 and the second interface 122 are connected through the gap 120 between the cartridge valve core 11 and the cartridge valve body 12.

[0042] This invention adds a directional valve 13 and a one-way throttle valve 14 to the traditional cartridge valve control oil circuit. The opening and closing of the directional valve 13 and the one-way throttle valve 14 enable the cartridge valve core 11 of the cartridge valve to move slowly in the inner cavity of the cartridge valve body 12, thereby ensuring that the control pressure is stable when the cartridge valve is open and that the control flow is controlled when it is open and closed.

[0043] In one embodiment, a first valve damper 151 is provided between the second interface 122 and the second valve port 132. The type of the first valve damper 151 is not limited, for example, it can be a damping orifice. In a further embodiment, the orifice diameter of the first valve damper 151 can be 1.2 mm.

[0044] In one embodiment, a second valve damper 152 is provided between the third interface 123 and the third valve port 133. The type of the second valve damper 152 is not limited; for example, it can be a damping orifice. In a further embodiment, the orifice diameter of the second valve damper 152 can be 0.6 mm.

[0045] In one embodiment, a third valve damper 153 is provided between the first valve port 131 and the drive source. The type of the third valve damper 153 is not limited; for example, it can be a damping orifice. In a further embodiment, the orifice diameter of the third valve damper 153 can be 1.2 mm.

[0046] This utility model efficiently integrates the buffer function with the standard cartridge valve control cover. Within the limited space inside the control cover, a one-way throttle valve 14 and a damping network (such as the first valve damper 151, the second valve damper 152, and the third valve damper 153) are rationally arranged, which further improves the shock resistance of the cartridge valve during opening and closing, alleviates the system pressure fluctuation caused by flow changes during opening and closing, and improves the stability and control accuracy of the entire hydraulic system.

[0047] In one exemplary embodiment, the axial direction of the cartridge valve body 12 is a first direction, and the axial direction of the directional valve 13 is a second direction, with the first direction perpendicular to the second direction. The axial direction of the cartridge valve body 12 can also be understood as the direction of movement of the cartridge valve core 11, and the axial direction of the directional valve 13 can be understood as the direction of movement of the valve core 130.

[0048] In a further embodiment, the reversing valve 13 is provided with a first spring 154. One end of the first spring 154 abuts against the valve core of the reversing valve 13, and the other end of the first spring 154 abuts against the inner wall of the valve body of the reversing valve 13 away from the first valve port 131.

[0049] Furthermore, a second spring 155 is provided inside the cartridge valve body 12. The first end of the second spring 155 abuts against one end of the cartridge valve core 11, and the second end of the second spring 155 abuts against the inner wall of the cartridge valve body 12 away from the first interface 121.

[0050] In this embodiment of the present invention, the first interface 121 and the second interface 122 can be understood as the working oil port of the cartridge valve, and the third interface 123 can be understood as the control oil port of the cartridge valve.

[0051] In one example of operation, the second port 122 is connected to the high-pressure chamber of the load. At this time, the valve core 130 of the reversing valve 13 is in the first position. The high-pressure oil passes through the first valve damper 151, the second valve port 132 and the third valve port 133 of the reversing valve 13, and the second valve damper 152 into the inner cavity of the cartridge valve body 12 connected by the third port 123. Since the pressure of the first port 121 is low, the cartridge valve core 11 is blocked between the first port 121 and the second port 122.

[0052] When the cartridge valve opens, the first valve port 131 of the directional valve 13 is connected to the drive source (e.g., externally controlled hydraulic oil). The externally controlled hydraulic oil enters the valve body of the directional valve 13 through the third valve damper 153. At this time, the valve core 130 is still in the first position. At this time, the third port 123 and the second port 122 of the cartridge valve body 12 are connected through the third valve port 133 and the second valve port 132 of the directional valve 13. When the oil pressure at the first valve port 131 reaches the threshold oil pressure, for example, 11.5 bar, the valve core 130 of the directional valve 13 is driven to the second position. The third port 123 of the cartridge valve body 12 is disconnected from the second port 122. The third port 123 of the cartridge valve body 12 is connected to the inlet 141 of the one-way throttle valve 14 and enters the drain port 142 through the second valve damper 152, the third valve port 133 and the fourth valve port 134 of the reversing valve 13. At this time, the one-way function of the one-way throttle valve 14 can be, for example, in the closed state. In one embodiment, the opening of the one-way throttle valve 14 can be set very small so that the hydraulic oil in the cartridge valve body 12 can flow out slowly, achieving the effect of the cartridge valve core 11 opening slowly.

[0053] When the cartridge valve is closed, the first valve port 131 of the directional valve 13 disconnects the external hydraulic oil. Under the spring force of the first spring 154, the valve core 130 of the directional valve 13 switches from the second position to the first position. The second port 122 enters the cartridge valve body 12 through the first valve damper 151, the second valve port 132, the third valve port 133, and the second valve damper 152, thus realizing the closing process of the cartridge valve. During closing, the first valve damper 151, the second valve damper 152, and the third valve damper 153 are mainly used for buffering, and the test results show that the buffering effect is good.

[0054] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A cartridge valve with a buffer function, characterized in that, This includes cartridge valve cores, cartridge valve bodies, directional valves, and one-way throttle valves; The cartridge valve core is disposed in the cartridge valve body, and the cartridge valve body has a first interface, a second interface and a third interface; the reversing valve has a first valve port, a second valve port, a third valve port and a fourth valve port; The first valve port is connected to a drive source to drive the valve core of the directional valve to move between a first position and a second position; the second interface is connected to the second valve port; the third valve port is connected to the third interface of the cartridge valve; and the fourth valve port is connected to the inlet of the one-way throttle valve. When the valve core of the reversing valve is in the first position, the second valve port is connected to the third valve port, and the second interface is connected to the third interface through the second valve port and the third valve port, so that the cartridge valve core is blocked between the first interface and the second interface. When the valve core of the reversing valve is in the second position, the third valve port is connected to the fourth valve port, and the third interface is connected to the inlet of the one-way throttle valve through the third valve port and the fourth valve port, so that the first interface and the second interface are connected through the gap between the cartridge valve core and the cartridge valve body.

2. The cartridge valve with buffer function according to claim 1, characterized in that, A first valve damper is provided between the second interface and the second valve port.

3. The cartridge valve with buffer function according to claim 2, characterized in that, The first valve damping is a damping orifice, and the diameter of the first valve damping orifice is 1.2mm.

4. The cartridge valve with buffer function according to claim 1, characterized in that, A second valve damper is provided between the third interface and the third valve port.

5. The cartridge valve with buffer function according to claim 4, characterized in that, The second valve damping is a damping orifice, and the orifice diameter of the second valve damping is 0.6 mm.

6. The cartridge valve with buffer function according to claim 1, characterized in that, A third valve damping is provided between the first valve port and the drive source.

7. The cartridge valve with buffer function according to claim 6, characterized in that, The third valve damping is a damping orifice, and the orifice diameter of the third valve damping is 1.2 mm.

8. The cartridge valve with buffer function according to any one of claims 1 to 7, characterized in that, The axial direction of the cartridge valve body is a first direction, and the axial direction of the reversing valve is a second direction, with the first direction perpendicular to the second direction.

9. The cartridge valve with buffer function according to any one of claims 1 to 7, characterized in that, The reversing valve is provided with a first spring. One end of the first spring abuts against the valve core of the reversing valve, and the other end of the first spring abuts against the inner wall of the valve body of the reversing valve away from the first valve port.

10. The cartridge valve with buffer function according to any one of claims 1 to 7, characterized in that, The cartridge valve body is provided with a second spring. The first end of the second spring abuts against one end of the cartridge valve core, and the second end of the second spring abuts against the inner wall of the cartridge valve body away from the first interface.

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