Switching-on method of valve body

Abstract

The invention discloses a valve body conduction method, which is realized through a valve body liquid control system, and comprises a one-way valve, a multi-way reversing valve, a pressure compensation valve, a first shuttle valve, a pressure reducing valve and a second shuttle valve, the method comprises the steps that the pressure reducing valve firstly gives a feedback signal, after the multi-way reversing valve is opened, hydraulic oil is supplied to the second shuttle valve through the pressure compensation valve and the first shuttle valve, and the feedback signal is obtained by comparing the oil pressure at the two ends of the second shuttle valve. The operation of the winch operating platform control system is more stable, the valve body can be better conducted, and oil is supplied to an execution element.

Description

Technical Field

[0001] The invention relates to the field of hydraulic technology, and in particular to a valve body conducting method. Background Art

[0002] A hydraulic winch is a device that uses a hydraulic system to provide power. Its working principle is to convert pressure into mechanical energy through a hydraulic oil circuit, thereby driving the winch to rotate. Today, hydraulic winches are used in construction engineering, navigation, and emergency rescue. In order to control the work of the winch, the winch is often connected to a winch console. The winch console, as the control center of the winch, integrates various control components to achieve precise control and monitoring of the winch. Through the console, the operator can easily control the start, stop, speed adjustment, and direction control of the winch to ensure the safety of the winch. Operation; The winch requires good working stability from start to stop. Therefore, when setting the hydraulic system of the valve body in the operating table, it is generally necessary to set up a feedback oil circuit to better control the hydraulic oil circuit system of the winch. The traditional method is usually to collect feedback signals on the drive motor of the winch. In this way, when the winch is started, if the oil circuit between the hydraulic pump and the hydraulic motor of the winch is too long, signal lag is likely to occur, and a reversing valve is generally installed in the winch oil circuit system to control the start and stop of the winch. Then, if the steering valve is not operated, the feedback signal cannot be collected. Summary of the invention

[0003] The purpose of the present invention is to provide a valve body conduction method. Using the method of the present invention, it is convenient to conduct the valve body, and the feedback signal can be obtained in time when the valve body hydraulic control system is started. After the valve body hydraulic control system is started, the feedback signal of the output end of the multi-way reversing valve can be obtained, making the operation of the valve body hydraulic control system more stable.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a valve body conduction method, which is realized by a valve body hydraulic control system, and the valve body hydraulic control system includes a one-way valve, a multi-way reversing valve, a pressure compensating valve, a first shuttle valve, a pressure reducing valve and a second shuttle valve; the input end of the one-way valve is connected to the oil inlet P, and the output end of the one-way valve is connected to the input end of the pressure reducing valve; one side of the multi-way reversing valve is connected to the oil inlet P, the output end of the pressure compensating valve and the oil return port T, and the other side of the multi-way reversing valve is connected to the input end of the pressure compensating valve, the first control end of the pressure compensating valve and the actuator, the output end of the pressure compensating valve is also connected to one end of the first shuttle valve, the other end of the first shuttle valve is connected to the oil return port T, and the middle end of the first shuttle valve is connected to one end of the second shuttle valve; the output end of the pressure reducing valve is connected to the other end of the second shuttle valve, and the middle end of the second shuttle valve is connected to the feedback oil circuit.

[0005] The specific steps include: S1. Start the hydraulic pump connected to the oil inlet P. The hydraulic oil enters the pressure reducing valve through the one-way valve. The hydraulic oil at the output end of the pressure reducing valve enters the feedback oil circuit through the second shuttle valve. The feedback oil circuit is connected to the hydraulic pump and adjusts the pumping volume of the hydraulic pump according to the feedback oil circuit signal.

[0006] S2. Open the multi-way reversing valve, and part of the hydraulic oil from the oil inlet P enters the input end and the control end of the pressure compensating valve. When the hydraulic oil enters the control end of the pressure compensating valve, open the pressure compensating valve, and part of the hydraulic oil enters one end of the first shuttle valve through the output end of the pressure compensating valve, and part of the hydraulic oil enters the multi-way reversing valve and enters the actuator.

[0007] S3. The hydraulic oil entering the first shuttle valve enters the other end of the second shuttle valve through the middle end of the first shuttle valve; if the hydraulic oil pressure at the other end of the second shuttle valve is greater than the pressure at the output end of the pressure reducing valve, the hydraulic oil at the other end of the second shuttle valve is given to the feedback oil circuit through the middle end of the second shuttle valve; if the hydraulic oil pressure at the other end of the second shuttle valve is less than the pressure at the output end of the pressure reducing valve, the hydraulic oil at the output end of the pressure reducing valve is given to the feedback oil circuit through the middle end of the second shuttle valve, and the pumping amount of the hydraulic pump is controlled by the hydraulic oil in the feedback oil circuit.

[0008] The above method generates a feedback signal when the valve body hydraulic control system is started. When the multi-way reversing valve is opened, the feedback signal can be selected on the one hand, and on the other hand, when the hydraulic oil pressure at the other end of the second shuttle valve is greater than the pressure at the output end of the pressure reducing valve, the feedback signal at the output end of the multi-way valve can be obtained, making the operation of the hydraulic control system more stable. At the same time, the actuator can be smoothly driven through the pressure compensation valve.

[0009] Furthermore, a first overflow valve is provided between the middle end of the first shuttle valve and the oil return port T0. When the hydraulic oil pressure at the middle end of the first shuttle valve is greater than the set pressure of the first overflow valve, part of the hydraulic oil leaks from the first overflow valve. In this way, the oil pressure at the middle end of the first shuttle valve can be better controlled.

[0010] Furthermore, a filter screen is provided between the middle end of the first shuttle valve and the first overflow valve, so that the first overflow valve can be better prevented from being blocked.

[0011] Furthermore, a second relief valve is connected between the oil inlet P and the oil return port T. When the hydraulic oil pressure at the oil inlet P is greater than the set pressure of the second relief valve, part of the hydraulic oil will flow out of the second relief valve. This can better limit the oil pressure at the oil inlet P and better protect the hydraulic control system.

[0012] Furthermore, the set pressure of the second relief valve is greater than the set pressure of the first relief valve. In this way, it can be ensured that after the multi-way reversing valve is switched, when the oil pressure of the hydraulic control system does not exceed the set pressure of the second relief valve, there is hydraulic oil at the middle end of the first shuttle valve.

[0013] Furthermore, a reversing valve is provided between the oil inlet P and the input end of the one-way valve, the input end of the reversing valve is connected to the oil inlet P, and the output end of the reversing valve is connected to the input end of the one-way valve and the control end of the reversing valve. In this way, it is possible to better control whether to supply oil to the pressure reducing valve.

[0014] Furthermore, the reversing valve is a three-position three-way reversing valve.

[0015] Furthermore, a first stop valve is provided at the output end of the oil inlet P, and a second stop valve is provided at the oil outlet T.

[0016] Furthermore, a third stop valve is provided between the output end of the one-way valve and the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall hydraulic system of an embodiment of the present invention; Figure 2 It is a schematic diagram of the hydraulic system of the winch control console in an embodiment of the present invention; Figure 3 for Figure 1 The enlarged schematic diagram at A in the middle; Figure 4 Schematic diagram of a pressure compensation valve. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown, a valve body conduction method is implemented by a valve body hydraulic control system, the valve body hydraulic control system has an oil inlet P and an oil return port T, and the valve body hydraulic control system includes a multi-way reversing valve 2, a pressure compensation valve 3, a first shuttle valve 4, a first overflow valve 5, a reversing valve 6, a second overflow valve 7, a pressure reducing valve 10, a one-way valve 11 and a second shuttle valve 12.

[0020] The oil inlet P is used to connect to the hydraulic pump. The oil inlet P is connected to one side of the multi-way reversing valve 2 and the input end of the reversing valve 6. One side of the multi-way reversing valve 2 is also connected to one end of the first shuttle valve 4 and the oil return port T. The other side of the multi-way reversing valve 2 is connected to the input end of the pressure compensation valve 3, the first control end of the pressure compensation valve 3 and the actuator. In this embodiment, the multi-way reversing valve is a manual three-position nine-way reversing valve. Specifically, Figure 2 and Figure 3As shown, in the original state of the multi-way reversing valve, the 01st end of the multi-way reversing valve 2 is connected to the oil inlet P, the 02nd end of the multi-way reversing valve 2 is connected to the input end of the pressure compensation valve 3 and the first control end of the pressure compensation valve 3, the 03rd end and the 04th end of the multi-way reversing valve 2 are empty, the 05th end of the multi-way reversing valve 2 is externally connected to the output end of the pressure compensation valve 3 and one end of the first shuttle valve 4, the 06th end and the 08th end of the multi-way reversing valve 2 are respectively connected to the A port and the B port of the actuator, the 07th end of the multi-way reversing valve 2 is externally connected to the oil outlet T, and the 09th end and the 010th end of the multi-way reversing valve 2 are empty.

[0021] like Figure 4 As shown, the pressure compensating valve 3 is a two-position two-way adjustable reversing valve. The pressure compensating valve 3 includes an input end 31, a first control end 32, an output end 33 and a second control end 34. The output end 33 of the pressure compensating valve 3 is connected to one end of the first shuttle valve 4 and one side of the multi-way reversing valve. The second control end 34 of the pressure compensating valve 3 has a spring.

[0022] The other end of the first shuttle valve 4 is connected to the oil return port T, the middle end of the first shuttle valve 4 is connected to the other end of the second shuttle valve 12, and the middle end of the first shuttle valve 4 is connected to the first relief valve 5 through the filter 13, and the output end of the first relief valve 5 is connected to the oil return port T0. By providing the filter 13, the hydraulic oil entering the first relief valve 5 is filtered, which can better protect the first relief valve 5.

[0023] like Figure 1 and Figure 3 As shown, a reversing valve 6 is provided between the oil inlet P and the input end of the one-way valve 11, the input end of the reversing valve 6 is connected to the oil inlet P, and the output end of the reversing valve 6 is connected to the input end of the one-way valve 11 and the control end of the reversing valve 6. In this embodiment, the reversing valve 6 is a three-position three-way reversing valve. By providing the reversing valve 6, whether to supply oil to the pressure reducing valve 10 can be controlled according to the hydraulic oil pressure of the oil outlet P.

[0024] The output end of the one-way valve 11 is connected to the input end of the pressure reducing valve 10. In order to test the hydraulic pressure at the output end of the one-way valve 11, a pressure relief valve 10 is provided at the output end P of the one-way valve 11. P A pressure gauge 9 is connected to the output end P of the check valve 11. P A third stop valve 83 is provided between the pressure gauge 9. When the hydraulic oil pressure needs to be detected, the third stop valve 83 is opened. When the hydraulic oil pressure does not need to be detected, the third stop valve 83 is closed. In the present invention, the one-way valve 11 is provided to prevent the hydraulic oil leading to the pressure reducing valve 10 from flowing back into the reversing valve 6.

[0025] In order to better protect the hydraulic control system, a second relief valve 7 is connected between the oil inlet P and the oil return port T. In the present invention, the set pressure of the second relief valve 7 is greater than the set pressure of the first relief valve 5. In this way, when the oil pressure at the oil inlet P is not greater than the set pressure of the second relief valve 7, oil supply to the pressure compensation valve 3 can be guaranteed.

[0026] The output end of the pressure reducing valve 10 is connected to one end of the second shuttle valve 12, the oil drain end of the pressure reducing valve 10 is connected to the oil outlet T0, and the set pressure of the pressure reducing valve 10 is less than the set pressure of the first relief valve 5. The middle end of the second shuttle valve 12 is connected to the feedback oil circuit, and the feedback oil circuit is connected to the control end of the hydraulic pump.

[0027] In order to better control the hydraulic control system, a first stop valve 81 is provided at the output end of the oil inlet P. Only when the first stop valve 81 is opened can the hydraulic control system be normally supplied with oil. A second stop valve 82 is provided on the oil outlet T. Only when the second stop valve 82 is opened can oil return be realized.

[0028] In this embodiment, the conduction method of the valve body is as follows: taking the diagram as the viewing direction, if the hydraulic pump supplying oil to the oil inlet P is started and the first stop valve 81 is opened, the hydraulic oil first enters the pressure reducing valve 10 from the reversing valve 6 and the one-way valve 11, and according to the set pressure of the pressure reducing valve 10, a constant oil pressure is generated at the output end of the pressure reducing valve 10, and oil is supplied to the feedback oil circuit through the second shuttle valve 12, and the pumping amount of the hydraulic pump is controlled through the feedback oil circuit.

[0029] After the above steps, if the multi-way reversing valve 2 is pushed upward, Figure 1 and Figure 2As shown, part of the hydraulic oil at the oil inlet P passes through the multi-way reversing valve 2 into the input end and the control end of the pressure compensating valve 3, and causes the pressure compensating valve 3 to be reversed. At this time, the pressure compensating valve 3 is turned on, and the hydraulic oil entering the input end of the pressure compensating valve 3 enters one end of the first shuttle valve 4 and one side of the multi-way reversing valve 2 through the output end of the pressure compensating valve 3. The hydraulic oil passing through the first shuttle valve 4 enters from the middle end of the first shuttle valve 4 to the other end of the second shuttle valve 12. The hydraulic oil entering one side of the multi-way reversing valve 2 enters the A port of the actuator, and the hydraulic oil at the B port of the actuator returns from the multi-way reversing valve 2 to the oil return port T, and then returns to the oil tank. If the hydraulic oil pressure at the other end of the second shuttle valve is greater than the pressure at the output end of the pressure reducing valve, the hydraulic oil at the other end of the second shuttle valve is given a feedback signal through the middle end of the second shuttle valve. If the hydraulic oil pressure at the other end of the second shuttle valve is less than the pressure at the output end of the pressure reducing valve, the hydraulic oil at the output end of the pressure reducing valve is given a feedback signal to the hydraulic pump through the middle end of the second shuttle valve. In this way, on the one hand, the feedback signal can be selected, and on the other hand, when the hydraulic oil pressure at the other end of the second shuttle valve is greater than the pressure at the output end of the pressure reducing valve, the feedback signal at the output end of the multi-way valve can be obtained, making the operation of the hydraulic control system more stable. Therefore, in the present invention, the feedback signal can be obtained in time when the valve body hydraulic control system is started, and the feedback signal at the output end of the multi-way reversing valve can be obtained after the valve body hydraulic control system is started, making the operation of the valve body hydraulic control system more stable.

[0030] If the multi-way reversing valve 2 is pushed downward, except that the oil inlet and oil outlet entering the A port and the B port of the actuator 100 are interchanged, the other working principles are consistent with the above.

[0031] In the present invention, the actuator 100 is a hydraulic motor on a winch.

Claims

1. A valve body conduction method, implemented by a valve body hydraulic control system, characterized in that: The valve body hydraulic control system comprises a one-way valve (11), a multi-way reversing valve (2), a pressure compensating valve (3), a first shuttle valve (4), a pressure reducing valve (10) and a second shuttle valve (12); the input end of the one-way valve (11) is connected to the oil inlet P, and the output end of the one-way valve (11) is connected to the input end of the pressure reducing valve (10); one side of the multi-way reversing valve (2) is connected to the oil inlet P, the output end of the pressure compensating valve (3) and the oil return port T, and the other side of the multi-way reversing valve (2) is connected to the input end of the pressure compensating valve (3), the first control end of the pressure compensating valve (3) and the actuator; the output end of the pressure compensating valve (3) is also connected to one end of the first shuttle valve (4), the other end of the first shuttle valve (4) is connected to the oil return port T, and the middle end of the first shuttle valve (4) is connected to one end of the second shuttle valve (12); the output end of the pressure reducing valve (10) is connected to the other end of the second shuttle valve (12), and the middle end of the second shuttle valve (12) is connected to the feedback oil circuit; The specific steps include: S1, start the hydraulic pump connected to the oil inlet P, the hydraulic oil enters the pressure reducing valve (10) through the one-way valve (11), the hydraulic oil at the output end of the pressure reducing valve (10) enters the feedback oil circuit through the second shuttle valve (12), the feedback oil circuit is connected to the hydraulic pump, and the pumping amount of the hydraulic pump is adjusted according to the feedback oil circuit signal; S2, the multi-way reversing valve (2) is opened, and part of the hydraulic oil at the oil inlet P enters the input end and the control end of the pressure compensating valve (3). When the hydraulic oil enters the control end of the pressure compensating valve (3), the pressure compensating valve (3) is opened, and part of the hydraulic oil enters one end of the first shuttle valve (4) through the output end of the pressure compensating valve (3), and part of the hydraulic oil enters the multi-way reversing valve (2) and enters the actuator 100; S3. The hydraulic oil entering the first shuttle valve (4) enters the other end of the second shuttle valve (12) through the middle end of the first shuttle valve (4); if the hydraulic oil pressure at the other end of the second shuttle valve (12) is greater than the pressure at the output end of the pressure reducing valve (10), the hydraulic oil at the other end of the second shuttle valve (12) is fed to the feedback oil circuit through the middle end of the second shuttle valve (12); if the hydraulic oil pressure at the other end of the second shuttle valve (12) is less than the pressure at the output end of the pressure reducing valve (10), the hydraulic oil at the output end of the pressure reducing valve (10) is fed to the feedback oil circuit through the middle end of the second shuttle valve (12), and the pumping amount of the hydraulic pump is controlled by the hydraulic oil in the feedback oil circuit.

2. The valve body conducting method according to claim 1, characterized in that: A first overflow valve (5) is provided between the middle end of the first shuttle valve (4) and the oil return port T0. When the hydraulic oil pressure at the middle end of the first shuttle valve (4) is greater than the set pressure of the first overflow valve (5), part of the hydraulic oil is discharged from the first overflow valve (5).

3. The valve body conducting method according to claim 2, characterized in that: A filter screen (13) is provided between the middle end of the first shuttle valve (4) and the first overflow valve (5).

4. The valve body conducting method according to claim 2, characterized in that: A second overflow valve (7) is connected between the oil inlet P and the oil return port T. When the hydraulic oil pressure at the oil inlet P is greater than the set pressure of the second overflow valve (7), part of the hydraulic oil is discharged from the second overflow valve (7).

5. The valve body conducting method according to claim 4, characterized in that: The set pressure of the second relief valve (7) is greater than the set pressure of the first relief valve (5).

6. The valve body conducting method according to claim 1, characterized in that: A reversing valve (6) is provided between the oil inlet P and the input end of the one-way valve (11); the input end of the reversing valve (6) is connected to the oil inlet P, and the output end of the reversing valve (6) is connected to the input end of the one-way valve (11) and the control end of the reversing valve (6).

7. The valve body conducting method according to claim 6, characterized in that: The reversing valve (6) is a three-position three-way reversing valve.

8. The valve body conducting method according to claim 1, characterized in that: A first stop valve (81) is provided at the output end of the oil inlet P, and a second stop valve (82) is provided at the oil outlet T.

9. The valve body conducting method according to claim 1, characterized in that: A third stop valve (83) is provided between the output end of the one-way valve (11) and the pressure gauge (9).

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