Method for conducting a valve body

Abstract

The application discloses a valve body conduction method, which is realized through a valve body hydraulic control system and comprises a check 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 following steps: the pressure reducing valve first gives a feedback signal; when the multi-way reversing valve is opened, the second shuttle valve is supplied with hydraulic oil through the pressure compensation valve and the first shuttle valve; and the feedback signal is obtained by comparing the oil pressure at two ends of the second shuttle valve; by using the method, the operation of a winch operation platform control system is more stable, the valve body can be better conducted, and the execution element can be better supplied with oil.

Description

Technical Field

[0001] This invention relates to the field of hydraulic technology, and more specifically to a method for opening a valve body. Background Technology

[0002] A hydraulic winch is a device that uses a hydraulic system to provide power. Its working principle is to convert hydraulic pressure into mechanical energy through hydraulic circuits, thereby driving the winch to rotate. Today, hydraulic winches are used in construction engineering, navigation, and emergency rescue. To control the winch's operation, it is often connected to a winch control panel. The winch control panel, as the control center of the winch, integrates various control components for precise control and monitoring of the winch. Through the control panel, operators can easily control the winch's start, stop, speed adjustment, and direction control functions, ensuring the winch's safety. Operation; the winch requires good operational stability from start to stop. Therefore, when setting up the hydraulic system of the valve body in the control panel, a feedback oil circuit is generally required to better control the hydraulic oil circuit system of the winch. Traditionally, the feedback signal is collected from the drive motor of the winch. In this case, when the winch starts, if the oil circuit between the hydraulic pump and the hydraulic motor of the winch is too long, signal lag is likely to occur. In addition, a directional valve is usually installed in the winch oil circuit system to control the start and stop of the winch. Therefore, if the directional valve is not operated, the feedback signal cannot be collected. Summary of the Invention

[0003] The purpose of this invention is to provide a valve body conduction method. Using this method, it is easy to conduct the valve body, and feedback signals can be obtained in a timely manner when the valve body hydraulic control system is started. After the valve body hydraulic control system is started, feedback signals from 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 objectives, the technical solution of the present invention is as follows: a valve body conduction method, implemented through a valve body hydraulic control system, the valve body hydraulic control system including a check valve, a multi-way directional valve, a pressure compensation valve, a first shuttle valve, a pressure reducing valve, and a second shuttle valve; the input end of the check valve is connected to the oil inlet P, and the output end of the check valve is connected to the input end of the pressure reducing valve; one side of the multi-way directional valve is connected to the oil inlet P, the output end of the pressure compensation valve, and the return port T, and the other side of the multi-way directional valve is connected to the input end of the pressure compensation valve, the first control end of the pressure compensation valve, and the actuator; the output end of the pressure compensation valve is also connected to one end of the first shuttle valve, the other end of the first shuttle valve is connected to the 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:

[0006] S1. Start the hydraulic pump connected to the oil inlet P. The hydraulic oil enters the pressure reducing valve through the check 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 the pumping volume of the hydraulic pump is adjusted according to the feedback oil circuit signal.

[0007] S2. Open the multi-way directional valve. Part of the hydraulic oil at the inlet P enters the input and control ends of the pressure compensation valve. When the hydraulic oil enters the control end of the pressure compensation valve, the pressure compensation valve is opened. Part of the hydraulic oil enters one end of the first shuttle valve through the output end of the pressure compensation valve, and part of it enters the multi-way directional valve and then enters the actuator.

[0008] S3. The hydraulic oil entering the first shuttle valve passes through the middle end of the first shuttle valve and enters the other end of the second 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 supplied 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 supplied to the feedback oil circuit through the middle end of the second shuttle valve. The hydraulic oil in the feedback oil circuit controls the pumping volume of the hydraulic pump.

[0009] The above method generates a feedback signal when the valve body hydraulic control system is started. When the multi-way directional valve is opened, the feedback signal can be selected, and 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 from 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.

[0010] Furthermore, a first relief valve is provided between the middle end of the first shuttle valve and the 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 relief valve, some hydraulic oil is discharged from the first relief valve. In this way, the oil pressure at the middle end of the first shuttle valve can be better controlled.

[0011] Furthermore, a filter screen is installed between the middle end of the first shuttle valve and the first overflow valve to better prevent the first overflow valve from becoming clogged.

[0012] 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 exceeds the set pressure of the second relief valve, some hydraulic oil is released from the second relief valve. This better limits the oil pressure at the oil inlet P and better protects the hydraulic control system.

[0013] Furthermore, the set pressure of the second relief valve is greater than that of the first relief valve. This ensures that, after the multi-way directional valve switches, hydraulic oil is available at the middle end of the first shuttle valve as long as the oil pressure in the hydraulic control system does not exceed the set pressure of the second relief valve.

[0014] Furthermore, a directional valve is installed between the oil inlet P and the input end of the check valve. The input end of the directional valve is connected to the oil inlet P, and the output end of the directional valve is connected to both the input end of the check valve and the control end of the directional valve. This allows for better control over whether oil is supplied to the pressure reducing valve.

[0015] Furthermore, the aforementioned directional valve is a three-position three-way directional valve.

[0016] Furthermore, a first shut-off valve is installed at the output end of the oil inlet P, and a second shut-off valve is installed at the oil outlet T.

[0017] Furthermore, a third shut-off valve is installed between the output end of the check valve and the pressure gauge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall hydraulic system according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the hydraulic system of the winch control panel in an embodiment of the present invention;

[0020] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of a pressure compensation valve. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, a valve body conduction method is achieved through a valve body hydraulic control system. The valve body hydraulic control system has an oil inlet P and an oil return port T. The valve body hydraulic control system includes a multi-way directional valve 2, a pressure compensation valve 3, a first shuttle valve 4, a first relief valve 5, a directional valve 6, a second relief valve 7, a pressure reducing valve 10, a check valve 11, and a second shuttle valve 12.

[0024] The oil inlet P is used to connect to the hydraulic pump. Oil inlet P is connected to one side of the multi-way directional valve 2 and the input end of the directional valve 6. One side of the multi-way directional valve 2 is also connected to one end of the first shuttle valve 4 and the return port T. The other side of the multi-way directional 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 directional valve is a manual three-position nine-way directional valve. Specifically, as shown... Figure 2 and Figure 3As shown, in the original state of the multi-way directional valve, the 01 end of the multi-way directional valve 2 is connected to the oil inlet P port, the 02 end of the multi-way directional valve 2 is connected to the input end and the first control end of the pressure compensation valve 3, the 03 and 04 ends of the multi-way directional valve 2 are unconnected, the 05 end of the multi-way directional 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 06 and 08 ends of the multi-way directional valve 2 are respectively connected to the A port and B port of the actuator, the 07 end of the multi-way directional valve 2 is externally connected to the oil outlet T, and the 09 and 010 ends of the multi-way directional valve 2 are unconnected.

[0025] like Figure 4 As shown, the pressure compensation valve 3 is a two-position two-way adjustable directional valve. The pressure compensation 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 compensation valve 3 is connected to one end of the first shuttle valve 4 and one side of the multi-way directional valve. The second control end 34 of the pressure compensation valve 3 has a spring.

[0026] The other end of the first shuttle valve 4 is connected to the return port T, and the middle end of the first shuttle valve 4 is connected to the other end of the second shuttle valve 12. Simultaneously, the middle end of the first shuttle valve 4 is connected to the first relief valve 5 via a filter screen 13, and the output end of the first relief valve 5 is connected to the return port T0. By setting the filter screen 13, the hydraulic oil entering the first relief valve 5 is filtered, thus better protecting the first relief valve 5.

[0027] like Figure 1 and Figure 3 As shown, a directional control valve 6 is provided between the oil inlet P and the input end of the check valve 11. The input end of the directional control valve 6 is connected to the oil inlet P, and the output end of the directional control valve 6 is connected to both the input end of the check valve 11 and the control end of the directional control valve 6. In this embodiment, the directional control valve 6 is a three-position three-way directional control valve. By setting the directional control valve 6, the supply of oil to the pressure reducing valve 10 can be controlled according to the hydraulic oil pressure at the oil outlet P.

[0028] The output of check valve 11 is connected to the input of pressure reducing valve 10. In order to test the hydraulic pressure at the output of check valve 11, the pressure is measured at the output P of check valve 11. P Pressure gauge 9 is connected to the output terminal P of check valve 11. P A third shut-off valve 83 is installed between the pressure gauge 9 and the pressure gauge. The third shut-off valve 83 is opened when hydraulic oil pressure needs to be detected, and closed when hydraulic oil pressure detection is not required. In this invention, the check valve 11 prevents hydraulic oil destined for the pressure reducing valve 10 from flowing back into the directional valve 6.

[0029] 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 this 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 can be supplied to the pressure compensation valve 3.

[0030] The output end of the pressure reducing valve 10 is connected to one end of the second shuttle valve 12, and the drain end of the pressure reducing valve 10 is connected to the oil outlet T0. 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.

[0031] To better control the hydraulic control system, a first shut-off valve 81 is installed at the output end of the oil inlet P. Only when the first shut-off valve 81 is open can the hydraulic control system be supplied with oil normally. A second shut-off valve 82 is installed at the oil outlet T. Only when the second shut-off valve 82 is open can oil return be achieved.

[0032] In this embodiment, the valve body is opened 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 shut-off valve 81 is opened, the hydraulic oil first enters the pressure reducing valve 10 from the reversing valve 6 and the check valve 11. 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. The pumping volume of the hydraulic pump is controlled by the feedback oil circuit.

[0033] After the above steps, if the multi-way directional valve 2 is pushed upwards, as follows: Figure 1 and Figure 2As shown, a portion of the hydraulic oil at inlet P enters the input and control ends of pressure compensation valve 3 through multi-way directional valve 2, causing pressure compensation valve 3 to switch. At this time, pressure compensation valve 3 is open, and the hydraulic oil entering the input end of pressure compensation valve 3 enters one end of the first shuttle valve 4 and one side of multi-way directional valve 2 through the output end of pressure compensation valve 3. The hydraulic oil passing through the first shuttle valve 4 enters the other end of the second shuttle valve 12 from the middle end of the first shuttle valve 4. The hydraulic oil entering one side of multi-way directional valve 2 enters port A of the actuator. The hydraulic oil at port B of the actuator returns from multi-way directional valve 2 to 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 sends 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 sends a feedback signal to the hydraulic pump through the middle end of the second shuttle valve. This allows for selection of the feedback signal, and also ensures that 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, feedback signals from the output end of the multi-way valve can be obtained, making the operation of the hydraulic control system more stable. Therefore, in this invention, feedback signals can be obtained promptly when the valve body hydraulic control system starts, and feedback signals from the output end of the multi-way directional valve can be obtained after the valve body hydraulic control system starts, making the operation of the valve body hydraulic control system more stable.

[0034] If the multi-way directional valve 2 is pushed downwards, the oil inlet and outlet of the actuator 100 at ports A and B will be interchanged, but otherwise the working principle is the same as described above.

[0035] In this invention, the actuating element 100 is a hydraulic motor on a winch.

Claims

1. A method for activating a valve body, implemented through a valve body hydraulic control system, characterized in that: The valve body hydraulic control system includes a check valve (11), a multi-way directional valve (2), a pressure compensation valve (3), a first shuttle valve (4), a pressure reducing valve (10), and a second shuttle valve (12). The input end of the check valve (11) is connected to the oil inlet P, and the output end of the check valve (11) is connected to the input end of the pressure reducing valve (10). One side of the multi-way directional valve (2) is connected to the oil inlet P, the output end of the pressure compensation valve (3), and the return oil port T. The other side of the multi-way directional 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. The output end of the pressure compensation 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 return oil port T. 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 check 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 volume of the hydraulic pump is adjusted according to the feedback oil circuit signal. S2. Open the multi-way directional valve (2). Part of the hydraulic oil at the inlet P enters the input and control ends of the pressure compensation valve (3). When the hydraulic oil enters the control end of the pressure compensation valve (3), the pressure compensation valve (3) is opened. Part of the hydraulic oil enters one end of the first shuttle valve (4) through the output end of the pressure compensation valve (3), and part of it enters the multi-way directional valve (2) and enters the actuator 100. S3. The hydraulic oil entering the first shuttle valve (4) passes through the middle end of the first shuttle valve (4) and enters the other end of the second shuttle valve (12). 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 given 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 given to the feedback oil circuit through the middle end of the second shuttle valve (12). The pumping volume of the hydraulic pump is controlled by the hydraulic oil in the feedback oil circuit.

2. The valve body conduction method according to claim 1, characterized in that: A first relief valve (5) is provided between the middle end of the first shuttle valve (4) and the 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 relief valve (5), part of the hydraulic oil is discharged from the first relief valve (5).

3. The valve body conduction 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 conduction method according to claim 2, characterized in that: A second relief 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 relief valve (7), part of the hydraulic oil is discharged from the second relief valve (7).

5. The valve body conduction 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 conduction 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 check 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 check valve (11) and the control end of the reversing valve (6).

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

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

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

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