A two-position four-way solenoid directional valve with P-type transition function and its hydraulic system

Abstract

This utility model discloses a two-position four-way solenoid directional valve and hydraulic system with a P-type transition function, relating to the field of valve technology, and can solve the technical problem of slow operation speed during reset of existing actuators. An embodiment of this utility model discloses a two-position four-way solenoid directional valve with a P-type transition function, including a valve body, a valve seat disposed within the valve body, and a valve core assembly; the valve seat has several P ports, T ports, A ports, and B ports, and the valve body has an equal pressure flow channel; in the energized state, the valve seat connects the P ports to the A ports and the T ports to the B ports through the valve core assembly; the valve core assembly includes an A-port valve core assembly, which includes an A-port valve core drive rod and an A-port directional valve core, wherein the pressure-bearing area of ​​the A-port valve core drive rod is larger than the pressure-bearing area of ​​the A-port directional valve core; the A-port valve core assembly also includes an A-port valve core action delay element for applying thrust to the A-port valve core drive rod.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a two-position four-way solenoid directional valve with P-type transition function and a hydraulic system. Background Technology

[0002] The existing two-position four-way solenoid directional valve is mainly used to control the movement of the actuator in different directions. When the solenoid directional valve is energized, the hydraulic oil flows from port P to port A, then into the actuator, and the hydraulic oil flowing out of the actuator flows from port B to port T. When the solenoid directional valve is de-energized, the hydraulic oil flows from port P to port B, then into the actuator, and the hydraulic oil flowing out of the actuator flows from port A to port T. By switching between the energized and de-energized states of the solenoid directional valve, the actuator can be controlled to move in the forward or reverse direction, thereby achieving the extension or retraction action.

[0003] However, the existing two-position four-way solenoid directional valve only has the function of controlling the flow direction of liquid oil. In reality, the return oil method is the same. When the actuator is running, the hydraulic oil flow mode of one inlet and one outlet makes it difficult to improve the running speed of the actuator.

[0004] Based on the above background, the inventors designed a two-position four-way solenoid directional valve and hydraulic system with P-type transition function, which can solve at least one of the above problems. Therefore, this application is filed. Utility Model Content

[0005] The purpose of this application is to provide a two-position four-way solenoid directional valve and hydraulic system with P-type transition function, to solve the technical problem of slow operating speed of existing actuators.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0007] On the one hand, this application provides a two-position four-way solenoid directional valve with P-type transition function, including a valve body and a valve seat disposed in the valve body, and a valve core assembly disposed in the valve seat;

[0008] The valve seat is provided with a plurality of P ports, T ports, A ports and B ports, and the valve body is provided with an isobaric flow channel for connecting the P ports, T ports, A ports and B ports on the valve seat respectively.

[0009] When energized, the valve seat connects port P to port A and port T to port B through the valve core assembly.

[0010] The valve core assembly includes an A-port valve core assembly, which includes an A-port valve core drive rod whose pressure-bearing surface communicates with a B-port, and an A-port reversing valve core whose pressure-bearing surface communicates with a A-port. The pressure-bearing area of ​​the A-port valve core drive rod is greater than the pressure-bearing area of ​​the A-port reversing valve core.

[0011] The A-port valve core assembly also includes an A-port valve core actuation delay element for applying resistance to the A-port valve core drive rod;

[0012] In the power-off state, there are two stages:

[0013] In Phase 1, the valve core action delay component at port A continuously applies resistance to the movement of the valve core drive rod at port A. The valve seat connects port P with ports A and B through the valve core assembly, while port T is disconnected from ports A and B, entering the P-type transition function phase.

[0014] Phase 2: The valve core drive rod at port A pushes the reversing valve core at port A to cut off port P and port A. At the same time, port A connects to port T, and port P connects to port B, exiting the P-type transition function phase.

[0015] Optionally, the A-port valve core action delay component is an A-port valve core action delay spring, with one end of the A-port valve core action delay spring pressing against the valve seat and the other end pressing against the A-port valve core drive rod.

[0016] Optionally, the valve core drive rod of port A includes a piston section and a drive rod section that are fixedly connected;

[0017] The piston section is slidably and sealingly connected to the valve seat.

[0018] The valve core delay spring at port A is mounted on the drive rod segment.

[0019] Optionally, the valve seat is provided with a first chamber, a second chamber, a third chamber, a fourth chamber, and a fifth chamber arranged along the same axis;

[0020] The A-port valve core drive rod and the A-port valve core action delay component are both located in the first chamber, and the A-port reversing valve core is located in the second chamber;

[0021] The valve core assembly also includes a B-port valve core assembly, which includes a B-port valve core reset rod and a B-port valve core reset spring disposed in the third chamber, a B-port reversing valve core disposed in the fourth chamber, and a B-port valve core drive rod disposed in the fifth chamber.

[0022] When energized, the B-port reversing valve core and the B-port valve core reset push rod move under pressure via the B-port valve core drive rod, and compress the B-port valve core reset spring.

[0023] In the power-off state, the B-port reversing valve core and the B-port valve core reset rod are reset under the thrust of the B-port valve core reset spring. The B-port reversing valve core cuts off the B-port from the T-port. At this time, the P-port is connected to the A-port and the B-port, and the process enters the first stage.

[0024] Optionally, it also includes a drive unit, which includes a valve core drive rod, and the valve core drive rod is coaxially arranged with the B-port valve core drive rod;

[0025] When energized, the valve core drive rod moves along its axis toward the direction of the valve core drive rod at port B.

[0026] On the other hand, this application provides a hydraulic system, including a two-position four-way solenoid directional valve with P-type transition function as described above, and an actuator;

[0027] The actuator includes a cylinder and an actuator element disposed within the cylinder;

[0028] Ports A and B are respectively connected to the interfaces on both sides of the cylinder body located on the actuator.

[0029] Beneficial effects of the utility model:

[0030] This application designs the pressure-bearing area of ​​the A-port valve core drive rod to be larger than that of the A-port directional valve core. Simultaneously, it incorporates an A-port valve core action delay element that applies thrust to the A-port valve core drive rod. This delays the directional action of the A-port valve core assembly in the two-position four-way solenoid directional valve when it is de-energized. Consequently, in the de-energized state, before the A-port valve core assembly completes its directional action, there is a P-type transitional functional stage where port P is simultaneously connected to ports A and B, while port T is cut off. This allows external actuators, such as single-rod piston cylinders or double-rod piston cylinders with unequal areas on both sides, to operate in a differential state during the P-type transitional functional stage, increasing the operating speed of the external actuators and solving the problems of the prior art. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0032] Figure 2 for Figure 1 A schematic cross-sectional view of AA when it is in an energized state.

[0033] Figure 3 This is a cross-sectional structural diagram of Embodiment 1 of this application when it is in a power-off state and enters a P-type transitional functional state.

[0034] Figure 4This is a cross-sectional structural diagram of Embodiment 1 of this application when it is in a power-off state and exits the P-type transition function state.

[0035] Figure 5 This is a schematic diagram of the flow channel structure in the energized state of Embodiment 2 of this application.

[0036] Figure 6 This is a schematic diagram of the flow channel structure in Embodiment 2 of the application when it is in a power-off state and enters the P-type transition function state.

[0037] Figure 7 This is a schematic diagram of the flow channel structure in Embodiment 2 of this application when it is in a state of power failure and exiting the P-type transition function.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Drive unit, 11-Valve core drive rod, 2-Valve body, 21-Isobaric flow channel, 3-B-port valve core assembly, 31-B-port valve core drive rod, 32-B-port directional valve core, 33-B-port valve core reset rod, 34-B-port valve core reset spring, 4-A-port valve core assembly, 41-A-port directional valve core, 42-A-port valve core drive rod, 43-A-port valve core action delay spring, 5-Valve seat, 501-First chamber, 502-Second chamber, 503-Third chamber, 504-Fourth chamber, 505-Fifth chamber, 6-Actuator, 61-Cylinder body, 62-Actuating element. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0041] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "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 commonly used when the utility model product is in use. They are only for the convenience of describing this 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 this utility model.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" 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 utility model based on the specific circumstances.

[0043] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Example 1:

[0045] like Figures 1 to 4 As shown, this embodiment provides a two-position four-way solenoid directional valve with P-type transition function, including a valve body 2 and a valve seat 5 disposed in the valve body 2, and a valve core assembly disposed in the valve seat 5.

[0046] The valve seat 5 is provided with a plurality of P ports, T ports, A ports and B ports, and the valve body 2 is provided with an isobaric flow channel 21 for connecting the P ports, T ports, A ports and B ports on the valve seat 5 respectively.

[0047] When energized, valve seat 5 connects port P to port A and port T to port B through valve core assembly;

[0048] The valve core assembly includes an A-port valve core assembly 4, which includes an A-port valve core drive rod 42 whose pressure-bearing surface is connected to a B-port, and an A-port reversing valve core 41 whose pressure-bearing surface is connected to a A-port. The pressure-bearing area of ​​the A-port valve core drive rod 42 is greater than the pressure-bearing area of ​​the A-port reversing valve core 41.

[0049] The A-port valve core assembly 4 also includes an A-port valve core action delay element for applying resistance to the A-port valve core drive rod 42;

[0050] In the power-off state, there are two stages:

[0051] In Phase 1, the valve core action delay component at port A continuously applies resistance to the movement of the valve core drive rod 42 at port A. The valve seat 5 connects port P with ports A and B through the valve core assembly, while port T is cut off from ports A and B, entering the P-type transition function phase.

[0052] Phase 2: The valve core drive rod 42 of port A pushes the reversing valve core 41 of port A to cut off port P and port A. At the same time, port A is connected to port T and port P is connected to port B, exiting the P-type transition function phase.

[0053] This embodiment designs the pressure-bearing area of ​​the A-port valve core drive rod 42 to be larger than the pressure-bearing area of ​​the A-port reversing valve core 41. Simultaneously, an A-port valve core action delay element applies a thrust to the A-port valve core drive rod 42, causing the reversing action of the A-port valve core assembly 4 to be delayed after the two-position four-way solenoid reversing valve of this application is de-energized. This allows the two-position four-way solenoid reversing valve to have a P-type transitional functional stage where the P-port is simultaneously connected to both the A-port and B-ports, while the T-port is cut off, before the A-port valve core assembly 4 completes its reversing action in the de-energized state. This enables the external actuator 6, such as a single-rod piston cylinder or a double-rod piston cylinder with unequal areas on both sides, to operate in a differential state during the P-type transitional functional stage, thereby increasing the operating speed of the external actuator 6 and solving the problems of the prior art.

[0054] In this embodiment, after entering the power-off state, because an A-port valve core action delay element is provided in the valve seat 5, and resistance can be applied to the A-port valve core drive rod 42, the A-port valve core drive rod 42 needs to overcome the resistance of the A-port valve core action delay element when pushing the A-port reversing valve core 41 to reset. This achieves a delay in the reversing process of the A-port valve core reversing assembly, thereby causing the two-position four-way solenoid reversing valve of this embodiment to enter stage one. At this time, port P is simultaneously connected to ports A and B, while port T is disconnected from ports P, A, and B. After connecting the external actuator 6, because the pressure-bearing areas of the chambers connected to ports A and B of the actuator 6 are not equal, the actuator element 62 in the actuator 6 will... Due to the unbalanced force, the hydraulic fluid in the actuator 6 moves to the side with a smaller pressure area. After flowing into the valve seat 5, the hydraulic fluid does not return to the hydraulic pump station but flows directly back from the valve seat 5 to the other side of the actuator 6. That is, after the hydraulic fluid flowing out of port A flows out of the actuator 6 and into the two-position four-way solenoid directional valve, it will flow directly back into the other side of the actuator 6 through port B. As a result, when the actuator 62 moves the same stroke, the hydraulic fluid compensation in the port A process can greatly reduce the oil supply. Therefore, while the port P maintains the original oil supply speed, the movement speed of the actuator 62 can be increased until the port A valve core assembly 4 exits the P-type transition function state. The port A valve core assembly 4 completes the reversal and enters stage two in the de-energized state.

[0055] In this embodiment, the valve body 2, valve seat 5, and other structures such as the several P ports, T ports, A ports, and B ports provided in the valve seat 5 are all existing structures of the existing two-position four-way solenoid directional valve. The B port valve core assembly 3, drive unit 1, and other structures in this embodiment are also existing structures, and the assembly relationship between the above components is also an existing assembly, which will not be described in detail here.

[0056] The core concept and creative contribution of this embodiment lies in improving the structure of the A-port valve core assembly 4, adding an A-port valve core action delay component, and utilizing the area difference design at both ends of the A-port valve core assembly 4. This allows the switching of the A-port valve core assembly 4 to have a certain delay after entering the de-energized state, compared to the traditional two-position four-way solenoid valve. This gives the entire valve an intermediate P-type transition function stage before completing the switching. After connecting the external actuator 6, this P-type transition function stage can be used to achieve rapid movement, effectively improving the operating speed of the actuator 62.

[0057] In this embodiment, the A-port valve core action delay component is the A-port valve core action delay spring 43. One end of the A-port valve core action delay spring 43 presses against the valve seat 5, and the other end presses against the A-port valve core drive rod 42. In this embodiment, using the A-port valve core action delay spring 43 as the A-port valve core action delay component can ensure that the entire valve structure can add a P-type transition function state without increasing the complexity of the structure.

[0058] In this embodiment, technicians can set different models of A-port valve core action delay springs 43 as needed to meet different specific application scenarios.

[0059] In some embodiments, technicians may replace the valve core action delay component at port A with other common mechanical components such as electromagnets or elastic rods as needed, which will not be elaborated here.

[0060] Similarly, the A-port valve core action delay component is not limited to being located on the side close to the A-port reversing valve core 41, but can also be located on the side of the A-port valve core drive rod 42 away from the reversing valve core 41. The force exerted by the A-port valve core action delay component on the A-port valve core drive rod 42 is set as a tension force, which can also delay the movement of the entire A-port valve core assembly 4, thereby generating a P-type transition function stage.

[0061] In this embodiment, the valve core drive rod 42 of port A includes a piston section and a drive rod section that are fixedly connected;

[0062] The piston section is slidably and sealingly connected to the valve seat 5;

[0063] The A-port valve core actuation delay spring 43 is mounted on the drive rod segment. In this embodiment, both the A-port valve core drive rod 42 and the A-port reversing valve core 41 adopt existing structures, which will not be described in detail here.

[0064] In this embodiment, the valve seat 5 is provided with a first chamber 501, a second chamber 502, a third chamber 503, a fourth chamber 504 and a fifth chamber 505 arranged along the same axis;

[0065] The A-port valve core drive rod 42 and the A-port valve core action delay element are both located in the first chamber 501, and the A-port reversing valve core 41 is located in the second chamber 502.

[0066] The valve core assembly also includes a B-port valve core assembly 3, which includes a B-port valve core reset rod 33 and a B-port valve core reset spring 34 disposed in the third chamber 503, a B-port reversing valve core 32 disposed in the fourth chamber 504, and a B-port valve core drive rod 31 disposed in the fifth chamber 505.

[0067] When energized, the B-port reversing valve core 32 and the B-port valve core reset push rod 33 move under pressure via the B-port valve core drive rod 31, and compress the B-port valve core reset spring 34.

[0068] In the power-off state, the B-port reversing valve core 32 and the B-port valve core reset rod 33 are reset under the thrust of the B-port valve core reset spring 34. The B-port reversing valve core 32 cuts off the B-port from the T-port. At this time, the P-port is connected to the A-port and the B-port, and the first stage is entered.

[0069] In this embodiment, the B-port valve core assembly 3 is an existing structure, and its switching action is the same as that of a conventional two-position four-way solenoid valve in both the energized and de-energized states, which will not be described in detail here.

[0070] In this embodiment, the core of the B-port valve core assembly 3 is that it directly completes the switching when the entire valve is in a de-energized state, while the A-port valve core assembly 4 delays the switching, so that the A-port valve core assembly 4 can enter the above-mentioned P-type transition function stage before the switching is completed, thereby increasing the operating speed of the external actuator 62.

[0071] In this embodiment, a drive unit 1 is also included. The drive unit 1 includes a valve core drive rod 11, which is coaxially arranged with the valve core drive rod 31 at port B.

[0072] When energized, the valve core drive rod 11 moves along its axial direction toward the valve core drive rod 31 at port B. The drive unit 1 in this embodiment is the existing structure of a two-position four-way solenoid valve, which will not be described in detail here.

[0073] Example 2:

[0074] like Figures 5 to 7 As shown, this embodiment provides a hydraulic system, including a two-position four-way solenoid directional valve with P-type transition function as described above, and an actuator 6;

[0075] The actuator 6 includes a cylinder 61 and an actuator 62 disposed within the cylinder 61;

[0076] Ports A and B are respectively connected to the interfaces on both sides of the cylinder body 61 located on the actuator 62.

[0077] like Figures 5 to 7 As shown, in this embodiment, the actuator 6 is a single-rod hydraulic cylinder, and the actuator 62 is a piston rod. The interfaces at both ends of the cylinder body 61 are connected to port A and port B, respectively. In the energized state, port P supplies oil to port A, and port B returns oil to port T, causing the actuator 62 to move in a direction away from its rod segment. At this time, as... Figure 5 As shown, after the system enters a power-off state, the entire system enters Phase One, as follows: Figure 6 As shown, this indicates the entry into the P-type transitional functional stage. At this time, port P is connected to ports A and B, while port T is disconnected from ports A, B, and P. Simultaneously, because the contact area between the piston section and the hydraulic oil is larger than that between the rod section and the hydraulic oil, the actuator 62 will move towards the rod section. Ports P and A simultaneously supply oil to port B, resulting in a decrease in the oil supply at port P for the same stroke of the actuator 62. However, with the oil supply speed at port P remaining constant, the moving speed of the actuator 62 can be significantly increased until the valve core assembly 4 at port A completes the reversal. The valve, under energized conditions, exits stage one and enters stage two. At this point, as... Figure 7 As shown, port P is connected to port B, and port A is connected to port T. The hydraulic oil flow path is the same as that of a conventional two-position four-way solenoid directional valve.

[0078] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A two-position four-way solenoid directional valve with P-type transition function, comprising a valve body (2) and a valve seat (5) disposed in the valve body (2), and a valve core assembly disposed in the valve seat (5); The valve seat (5) is provided with a plurality of P ports, T ports, A ports and B ports, and the valve body (2) is provided with an isobaric flow channel (21) for connecting the P ports, T ports, A ports and B ports on the valve seat (5). When energized, the valve seat (5) connects the P port to the A port and the T port to the B port through the valve core assembly; The valve core assembly comprises an A-port valve core assembly (4), the A-port valve core assembly (4) comprises an A-port valve core driving rod (42) in communication with the B-port through a pressure surface, and an A-port reversing valve core (41) in communication with the A-port through a pressure surface, characterized in that, The pressure-bearing area of ​​the valve core drive rod (42) at port A is greater than the pressure-bearing area of ​​the reversing valve core (41) at port A; The A-port valve core assembly (4) also includes an A-port valve core action delay element for applying resistance to the A-port valve core drive rod (42); In the power-off state, there are two stages: In stage one, the valve core action delay component of port A continuously applies resistance to the movement of the valve core drive rod (42) of port A. The valve seat (5) realizes the connection between port P and ports A and B through the valve core assembly, while port T is cut off from ports A and B, and enters the P-type transition function stage. Phase 2: The valve core drive rod (42) of port A pushes the reversing valve core (41) of port A to cut off port P and port A. At the same time, port A is connected to port T and port P is connected to port B, exiting the P-type transition function phase.

2. The two-position four-way electromagnetic directional control valve with P-type transition function according to claim 1, characterized in that, The A-port valve core action delay component is an A-port valve core action delay spring (43). One end of the A-port valve core action delay spring (43) presses against the valve seat (5), and the other end presses against the A-port valve core drive rod (42).

3. The two-position four-way electromagnetic directional control valve with P-type transition function according to claim 2, characterized in that, The valve core drive rod (42) of port A includes a piston section and a drive rod section that are fixedly connected; The piston section is slidably and sealingly connected to the valve seat (5); The valve core action delay spring (43) of port A is mounted on the drive rod segment.

4. The two-position four-way electromagnetic directional control valve with P-type transition function according to claim 1, characterized in that, The valve seat (5) is provided with a first chamber (501), a second chamber (502), a third chamber (503), a fourth chamber (504) and a fifth chamber (505) arranged along the same axis. The A-port valve core drive rod (42) and the A-port valve core action delay component are both located in the first chamber (501), and the A-port reversing valve core (41) is located in the second chamber (502). The valve core assembly also includes a B-port valve core assembly (3), which includes a B-port valve core reset rod (33) and a B-port valve core reset spring (34) located in the third chamber (503), a B-port reversing valve core (32) located in the fourth chamber (504), and a B-port valve core drive rod (31) located in the fifth chamber (505). When energized, the B-port reversing valve core (32) and the B-port valve core reset push rod (33) move by pressing through the B-port valve core drive rod (31), and compress the B-port valve core reset spring (34). In the power-off state, the B-port reversing valve core (32) and the B-port valve core reset push rod (33) are reset under the thrust of the B-port valve core reset spring (34). The B-port reversing valve core (32) cuts off the B-port from the T-port. At this time, the P-port is connected to the A-port and the B-port, and the first stage is entered.

5. The two-position four-way electromagnetic directional control valve with P-type transition function according to claim 4, characterized in that, It also includes a drive unit (1), which includes a valve core drive rod (11) and is coaxially arranged with the valve core drive rod (31) at port B. When energized, the valve core drive rod (11) moves along its axial direction toward the valve core drive rod (31) at port B.

6. A hydraulic system characterized by, Includes a two-position four-way solenoid directional valve with P-type transition function as described in any one of claims 1-5, and an actuator (6). The actuator (6) includes a cylinder (61) and an actuator (62) disposed within the cylinder (61); Ports A and B are respectively connected to the interfaces on both sides of the cylinder body (61) located on the actuator (62).

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