A hand automatic switching valve and hydraulic device

Abstract

The utility model provides a kind of hand automatic switching valve and hydraulic device, it is related to valve technical field.Hand automatic switching valve includes valve seat, first, second, third, fourth, fifth, sixth, seventh interface point and first, second, third, fourth, fifth, sixth valve are arranged on valve seat, first oil path connection point is connected with third interface point and first, fourth valve intercommunication, second oil path connection point is connected with fourth interface point and second, third valve intercommunication, third oil path connection point is connected with first, third, fifth valve and fifth interface point intercommunication, fourth oil path connection point is connected with second, fourth, sixth valve and sixth interface point intercommunication, fifth oil path connection point is connected with first interface point and fifth, sixth valve intercommunication, sixth oil path connection point is connected with second interface point and sixth, fifth valve intercommunication, seventh interface point is connected with third, fourth valve intercommunication.The utility model solves the problem that traditional hand automatic switching valve cannot be automatically switched, and automatically selects manual or automatic operation based on pressure.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a manual / automatic switching valve and a hydraulic device. Background Technology

[0002] In hydraulic systems, there are pressure valves based on pressure, flow valves based on flow rate, and directional valves based on direction. These, as the most basic connecting units of a hydraulic system, constitute a typical hydraulic system. When the system's execution needs to become more complex, the simple combination of ordinary connecting units becomes complicated and even difficult to adapt. To ensure reliable execution of actions, hydraulic systems, in addition to automatic operation, also require manual or degraded functions. A switching operation is often required when executing manual or automatic functions.

[0003] Currently, the common operating procedure is to mechanically switch the manual / automatic switching valve to the "automatic" position when automatic functions are needed, and to the "manual" position when manual functions are needed. This method achieves manual / automatic switching through a single switching valve. However, in unmanned environments or when no one is involved, this switching valve faces serious problems. If it is accidentally switched to the "manual" position, automatic functions cannot be executed, thus preventing remote operation. Furthermore, when the operator needs to perform manual operation, an additional action of switching from automatic to manual is required.

[0004] The current manual / automatic switching valve based on mechanical selection is seriously unsuitable for the needs of future unmanned operation. There is an urgent need for a manual / automatic switching valve that can automatically switch between manual and automatic functions under unmanned conditions. Utility Model Content

[0005] The purpose of this invention is to develop a manual-automatic switching valve and hydraulic device that solves the problem of traditional manual-automatic switching valves not being able to switch automatically, and that automatically selects between manual and automatic operation based on pressure.

[0006] This utility model is achieved through the following technical solution:

[0007] A manual / automatic switching valve, comprising:

[0008] Valve seat;

[0009] The first interface point, the second interface point, the third interface point, the fourth interface point, the fifth interface point, the sixth interface point, and the seventh interface point are located on the valve seat;

[0010] The first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve are mounted on the valve seat;

[0011] The first oil circuit connection point, the second oil circuit connection point, the third oil circuit connection point, the fourth oil circuit connection point, the fifth oil circuit connection point, and the sixth oil circuit connection point are located inside the valve seat;

[0012] Specifically, the first oil circuit connection point is connected to the third interface point, the first valve, and the fourth valve; the second oil circuit connection point is connected to the fourth interface point, the second valve, and the third valve; the third oil circuit connection point is connected to the first valve, the third valve, the fifth interface point, and the fifth valve; the fourth oil circuit connection point is connected to the second valve, the fourth valve, the sixth interface point, and the sixth valve; the fifth oil circuit connection point is connected to the first interface point, the fifth valve, and the sixth valve; the sixth oil circuit connection point is connected to the second interface point, the sixth valve, and the fifth valve; and the seventh interface point is connected to the third valve and the fourth valve.

[0013] Optionally, the first and second valves are ordinary check valves, and the third, fourth, fifth and sixth valves are hydraulically controlled check valves.

[0014] A hydraulic device, comprising:

[0015] Manual / automatic switching valve, actuator, first pressure oil supply element and second pressure oil supply element;

[0016] The oil tank is connected to the first pressure oil supply element and the second pressure oil supply element;

[0017] The actuator is connected to the fifth and sixth interface points, the two oil circuits of the first pressure oil supply element are connected to the third and fourth interface points respectively, the two oil circuits of the second pressure oil supply element are connected to the first and second interface points respectively, and the seventh interface point is connected to the oil tank circuit.

[0018] Optionally, the actuating element is a hydraulic cylinder, and the fifth and sixth interface points are connected to both ends of the hydraulic cylinder.

[0019] Optionally, the first pressure oil supply element is a two-way hand-cranked pump.

[0020] Optionally, the second pressure oil supply element is a servo valve.

[0021] The beneficial effects of this utility model are:

[0022] This invention automatically selects between manual and automatic operation based on the oil pressure, establishes different hydraulic circuits, and realizes the corresponding mechanism actions. By using a pressure-based manual / automatic switching valve, it solves the problem that traditional manual / automatic switching valves cannot switch automatically. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the hydraulic circuit structure for the manual / automatic switching valve.

[0025] Figure 2 This is a schematic diagram of the hydraulic circuit structure of a hydraulic device.

[0026] Reference numerals: First interface point A7, Second interface point B7, Third interface point P1, Fourth interface point P2, Fifth interface point A, Sixth interface point B, Seventh interface point Y1, First valve D1, Second valve D2, Third valve D3, Fourth valve D4, Fifth valve D5, Sixth valve D6, First oil circuit connection point K1, Second oil circuit connection point K2, Third oil circuit connection point O1, Fourth oil circuit connection point O2, Fifth oil circuit connection point O3, Sixth oil circuit connection point O4. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] like Figure 1As shown, this utility model discloses a manual / automatic switching valve, including a valve seat. The valve seat has seven external interface points: a first interface point A7, a second interface point B7, a third interface point P1, a fourth interface point P2, a fifth interface point A, a sixth interface point B, and a seventh interface point Y1. The valve seat also has six plug-in valves: a first valve D1, a second valve D2, a third valve D3, a fourth valve D4, a fifth valve D5, and a sixth valve D6. Among them, the first valve D1 and the second valve D2 are ordinary check valves, while the third valve D3, the fourth valve D4, the fifth valve D5, and the sixth valve D6 are hydraulically controlled check valves.

[0031] The valve seat has six oil circuit connection points: a first oil circuit connection point K1, a second oil circuit connection point K2, a third oil circuit connection point O1, a fourth oil circuit connection point O2, a fifth oil circuit connection point O3, and a sixth oil circuit connection point O4.

[0032] The first oil circuit connection point K1 is connected to the third interface point P1, the first valve D1 and the fourth valve D4;

[0033] The second oil circuit connection point K2 is connected to the fourth interface point P2, the second valve D2 and the third valve D3;

[0034] The third oil circuit connection point O1 is connected to the first valve D1, the third valve D3, the fifth interface point A and the fifth valve D5;

[0035] The fourth oil circuit connection point O2 is connected to the second valve D2, the fourth valve D4, the sixth interface point B, and the sixth valve D6;

[0036] The fifth oil circuit connection point O3 is connected to the first interface point A7, the fifth valve D5, and the sixth valve D6;

[0037] The sixth oil circuit connection point O4 is connected to the second interface point B7, the sixth valve D6, and the fifth valve D5;

[0038] In addition, the seventh interface point Y1 is connected to the third valve D3 and the fourth valve D4.

[0039] like Figure 2 As shown, this utility model also discloses a hydraulic device based on the aforementioned manual / automatic switching valve, including a hydraulic cylinder, a servo valve, and a two-way hand-cranked pump. The hydraulic cylinder serves as the actuating element and can also be a motor, etc. The servo valve and the two-way hand-cranked pump are connected to the oil tank (not shown in the figure) as two-way pressure oil supply elements. The servo valve is the interface commonly used in the system, and the two-way hand-cranked pump is mainly used for degraded or backup operations.

[0040] The two oil circuits of the servo valve are connected to the first interface point A7 and the second interface point B7 respectively. The two oil circuits of the bidirectional hand pump are connected to the third interface point P1 and the fourth interface point P2 respectively. The two ends of the oil cylinder are connected to the fifth interface point A and the sixth interface point B respectively. The seventh interface point Y1 is connected to the oil tank circuit (not shown in the figure).

[0041] When the servo valve has pressurized oil and the bidirectional hand pump has no pressurized oil, the pressurized oil is transmitted through the automatic circuit of the manual-automatic switching valve, and the mechanism is automatically operated through the servo valve.

[0042] Pressure oil enters from the servo valve: When pressure oil enters from the first interface point A7, simultaneously opening the fifth valve D5, pressure oil flows from the fifth oil circuit connection point O3 to the sixth valve D6. At this time, the pressure oil travels along the path from the first interface point A7 → the fifth oil circuit connection point O3 → the fifth valve D5 → the third oil circuit connection point O1 → the fifth interface point A to one end of the cylinder. The pressure oil at the other end of the cylinder travels along the path from the sixth interface point B → the fourth oil circuit connection point O2 → the sixth valve D6 → the sixth oil circuit connection point O4 → the second interface point B7 back to the oil tank. When... When the pressurized oil enters from the second interface point B7, the route is exactly the opposite. At the same time as the sixth valve D6 is opened, the pressurized oil flows from the sixth oil circuit connection point O4 to the fifth valve D5. At this time, the pressurized oil enters one end of the cylinder along the route from the second interface point B7 → the sixth oil circuit connection point O4 → the sixth valve D6 → the fourth oil circuit connection point O2 → the sixth interface point B. The pressurized oil at the other end of the cylinder returns to the oil tank along the route from the fifth interface point A → the third oil circuit connection point O1 → the fifth valve D5 → the fifth oil circuit connection point O3 → the first interface point A7.

[0043] When the servo valve has no pressurized oil but the hand pump has pressurized oil, the pressurized oil is transmitted through the manual circuit of the manual-automatic switching valve, and the mechanism is manually operated through the bidirectional hand pump.

[0044] The pressurized oil enters from the bidirectional hand pump, and the pressurized oil at the third interface point P1 and the fourth interface point P2 will not appear at the same time. When pressurized oil enters from the third interface point P1, simultaneously with opening the first check valve D1, pressurized oil flows from the first oil circuit connection point K1 to the fourth valve D4, opening the fourth valve D4. The pressurized oil then flows along the path from the third interface point P1 → the first oil circuit connection point K1 → the first valve D1 → the third oil circuit connection point O1 → the fifth interface point A into one end of the cylinder. The oil in the other end flows along the path from the sixth interface point B → the fourth oil circuit connection point O2 → the fourth valve D4 → the seventh interface point Y1 back to the oil tank. When pressurized oil enters from the fourth interface point P2, the path is exactly the opposite. Simultaneously with opening the second valve D2, pressurized oil flows from the second oil circuit connection point K2 to the third valve D3, opening the third valve D3. The pressurized oil then flows along the path from the fourth interface point P2 → the second oil circuit connection point K2 → the second valve D2 → the fourth oil circuit connection point O2 → the sixth interface point B into one end of the cylinder. The oil in the other end flows along the path from the fifth interface point A → the third oil circuit connection point O1 → the third valve D3 → the seventh interface point Y1 back to the oil tank.

[0045] When both the servo valve and the hand pump have pressurized oil, the circuit with the higher pressure is automatically established, and manual and automatic switching are performed based on pressure. The logic for selecting the valve for manual / automatic switching is based on the higher pressure; whichever has the higher pressure between the bidirectional hand pump and the servo valve has the right to connect the circuit. If the pressure of the bidirectional hand pump is higher than the pressure from the servo valve, the servo valve will be unable to open because its check valves (valve D5 and valve D6) will be closed due to the lower pressure. Similarly, if the pressure of the servo valve is higher than the pressure from the bidirectional hand pump, the bidirectional hand pump will be unable to open because its check valves (valve D1, valve D2, valve D3, and valve D4) will be closed due to the lower pressure.

[0046] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A manual / automatic switching valve, characterized in that, include: Valve seat; The first interface point, the second interface point, the third interface point, the fourth interface point, the fifth interface point, the sixth interface point, and the seventh interface point are located on the valve seat; The first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve are mounted on the valve seat; The first oil circuit connection point, the second oil circuit connection point, the third oil circuit connection point, the fourth oil circuit connection point, the fifth oil circuit connection point, and the sixth oil circuit connection point are located inside the valve seat; Specifically, the first oil circuit connection point is connected to the third interface point, the first valve, and the fourth valve; the second oil circuit connection point is connected to the fourth interface point, the second valve, and the third valve; the third oil circuit connection point is connected to the first valve, the third valve, the fifth interface point, and the fifth valve; the fourth oil circuit connection point is connected to the second valve, the fourth valve, the sixth interface point, and the sixth valve; the fifth oil circuit connection point is connected to the first interface point, the fifth valve, and the sixth valve; the sixth oil circuit connection point is connected to the second interface point, the sixth valve, and the fifth valve; and the seventh interface point is connected to the third valve and the fourth valve.

2. The manual / automatic switching valve according to claim 1, characterized in that, The first and second valves are ordinary check valves, while the third, fourth, fifth, and sixth valves are hydraulically controlled check valves.

3. A hydraulic device, characterized in that, include: The manual / automatic switching valve, the actuator, the first pressure oil supply element, and the second pressure oil supply element as described in claim 1 or 2; The oil tank is connected to the first pressure oil supply element and the second pressure oil supply element; The actuator is connected to the fifth and sixth interface points, the two oil circuits of the first pressure oil supply element are connected to the third and fourth interface points respectively, the two oil circuits of the second pressure oil supply element are connected to the first and second interface points respectively, and the seventh interface point is connected to the oil tank circuit.

4. The hydraulic device according to claim 3, characterized in that, The actuator is a hydraulic cylinder, and the fifth and sixth interface points are connected to both ends of the hydraulic cylinder.

5. The hydraulic device according to claim 3, characterized in that, The first pressure oil supply element is a bidirectional hand-cranked pump.

6. The hydraulic device according to claim 3, characterized in that, The second pressure oil supply element is a servo valve.

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