Control hydraulic system of winch

Abstract

The utility model provides a control hydraulic system of a winch, which comprises a first cartridge valve and a second cartridge valve, an A port of the first cartridge valve is connected with a first oil return port of an oil tank, a B port of the first cartridge valve is connected with a second port of a motor, an A port of the second cartridge valve is connected with a second oil return port of the oil tank, and a B end of the second cartridge valve is connected with a second port of the motor; a first port of the motor is connected with a first oil outlet and a second oil outlet of the oil tank, the first oil outlet is further connected with the control end of the second cartridge valve, and the second oil outlet is further connected with the control end of the first cartridge valve. A first oil outlet of the oil tank is connected with the control end of the second cartridge valve, and a second oil outlet is connected with the control end of the first cartridge valve; the first oil return opening is further connected with the control end of the second cartridge valve, and the second oil return opening is further connected with the control end of the first cartridge valve. The oil way is simple in structure, and the speed of the motor can be adjusted only through a simple control valve.

Description

Technical Field

[0001] The utility model relates to the technical field of winch control systems, and particularly relates to a control hydraulic system for a winch. Background Art

[0002] Nowadays, various ship winches should all have the function of "heavy load at low speed, light load at high speed", and this function is realized by the high and low speed switching of a variable motor, that is, by changing the displacement of the motor through a motor variable mechanism, so as to change the output torque and speed of the motor.

[0003] For example, the patent document with the Chinese patent application number 200610002237.9 and the publication date of March 12, 2008 discloses a skid-mounted electro-hydraulic proportional speed regulation system, which includes a bidirectional variable pump, a bidirectional variable motor, and two skid-mounted electro-hydraulic proportional speed regulation valves that are respectively connected in series between the circuits formed by the bidirectional variable pump and the bidirectional variable motor and whose control ports are connected in parallel. The skid-mounted electro-hydraulic proportional speed regulation valve includes a main valve and an electro-hydraulic proportional speed regulation valve that are connected in parallel. The main valve is composed of a check valve and a hydraulic slide valve connected in parallel. When there is no pressure oil at the control port, the oil circuit between the inlet and outlet ports is connected. When there is pressure oil at the control port, the oil circuit between the inlet and outlet ports is blocked. The skid-mounted electro-hydraulic proportional speed regulation valve proposed by this invention can meet the use requirements in Class II explosion-proof areas of petroleum. The skid-mounted electro-hydraulic proportional speed regulation system has two speed regulation functions: volume speed regulation and electro-hydraulic proportional throttle speed regulation and can automatically switch. This system can realize the adjustment of fine flow rate and ensure the normal and stable operation of the motor in the two speed regulation circuits.

[0004] This document realizes speed regulation by setting a variable motor, but the variable motor is expensive, has a large internal leakage, and has low efficiency. In actual application, the cost problem and the connection of the oil circuit also need to be considered. Summary of the Invention

[0005] The utility model provides a control hydraulic system for a winch, with a simple oil circuit structure, and only a simple control valve is needed to realize the speed regulation of the motor.

[0006] To achieve the above object, the technical solution of the present utility model is: a control hydraulic system for a winch, including a first cartridge valve and a second cartridge valve. The A port of the first cartridge valve is connected to the first oil return port of the fuel tank, the B port of the first cartridge valve is connected to the second port of the motor, the A port of the second cartridge valve is connected to the second oil return port of the fuel tank, and the B end of the second cartridge valve is connected to the second port of the motor; the first port of the motor is connected to the first oil outlet and the second oil outlet of the fuel tank. The first oil outlet is also connected to the control end of the second cartridge valve, and the second oil outlet is also connected to the control end of the first cartridge valve; the first oil outlet of the fuel tank is connected to the control end of the second cartridge valve, and the second oil outlet is connected to the control end of the first cartridge valve; the first oil return port is also connected to the control end of the second cartridge valve, and the second oil return port is also connected to the control end of the first cartridge valve; the hydraulic oil flow rate of the first cartridge valve is higher than that of the second cartridge valve.

[0007] In the above structure, by setting two cartridge valves with different flow rates, when low-speed lifting and lowering are required, the low-flow cartridge valve is used for driving, and when high speed is required, the high-flow cartridge valve is used. Moreover, when one of the cartridge valves is used for driving, a branch can be separated from the normally flowing oil circuit to control and close the other cartridge valve, so that the two cartridge valves do not interfere with each other, ensuring that high and low speed control will not be hindered by the other cartridge valve and enabling high and low speed control of the winch through a simple oil circuit.

[0008] Further, a first shuttle valve is provided between the control end of the first cartridge valve and the second oil return port. The first port of the first shuttle valve is connected to the second oil return port, the second port of the first shuttle valve is connected to the fuel tank, and the third port of the first shuttle valve is connected to the control end of the first cartridge valve.

[0009] With the above setting, the flow direction of the hydraulic oil is controlled through the setting of the first shuttle valve, facilitating the control of the first cartridge valve.

[0010] Further, a second shuttle valve is provided between the control end of the second cartridge valve and the first oil return port. The first port of the second shuttle valve is connected to the first oil return port, the second port of the second shuttle valve is connected to the fuel tank, and the third port of the second shuttle valve is connected to the control end of the second cartridge valve.

[0011] With the above setting, the flow direction of the hydraulic oil is controlled through the setting of the second shuttle valve, facilitating the control of the second cartridge valve.

[0012] Further, a first balance valve is provided between the first oil outlet and the motor. The first balance valve includes a first overflow valve and a first check valve. The oil inlet end of the first overflow valve is connected to the first port of the motor, the oil outlet end of the first overflow valve is connected to the first oil outlet, the oil inlet end of the first check valve is connected to the first oil outlet, and the oil outlet end of the first check valve is connected to the first port of the motor. The control end of the first overflow valve is connected to the first oil return port.

[0013] With the above settings, by setting the first balance valve, the pressure of the hydraulic oil flowing from the first oil outlet to the motor is stabilized.

[0014] Further, a second balance valve is provided between the second oil outlet and the motor. The second balance valve includes a second overflow valve and a second check valve. The oil inlet end of the second overflow valve is connected to the first port of the motor, the oil outlet end of the second overflow valve is connected to the second oil outlet, the oil inlet end of the second check valve is connected to the second oil outlet, and the oil outlet end of the second check valve is connected to the first port of the motor. The control end of the second overflow valve is connected to the second oil return port.

[0015] With the above settings, by setting the second balance valve, the pressure of the hydraulic oil flowing from the second oil outlet to the motor is stabilized.

[0016] Further, a third shuttle valve is also provided between the first oil outlet and the second shuttle valve. The first port of the third shuttle valve is connected to the first oil outlet, the second port of the third shuttle valve is connected to the first oil return port, and the third port of the third shuttle valve is connected to the first port of the second shuttle valve.

[0017] With the above settings, when the hydraulic oil flows to the third shuttle valve, it drives the first port and the third port of the third shuttle valve to communicate, so that the hydraulic oil flows through the third shuttle valve to the second shuttle valve and then through the second shuttle valve into the control end of the second cartridge valve, driving the second cartridge valve to close.

[0018] Further, a fourth shuttle valve is also provided between the second oil outlet and the first shuttle valve. The first port of the fourth shuttle valve is connected to the second oil outlet, the second port of the fourth shuttle valve is connected to the first oil outlet, and the third port of the fourth shuttle valve is connected to the first port of the first shuttle valve.

[0019] With the above settings, when the hydraulic oil flows to the fourth shuttle valve, it drives the first port and the third port of the fourth shuttle valve to communicate, so that the hydraulic oil flows through the fourth shuttle valve to the first shuttle valve and then through the first shuttle valve into the control end of the first cartridge valve, driving the first cartridge valve to close.

[0020] Further, a manual oil pump is provided between the second port of the first shuttle valve and the second port of the second shuttle valve and the fuel tank.

[0021] With the above settings, through the setting of the manual oil pump, when maintenance and repair of the oil circuit are required, the manual oil pump can pump hydraulic oil into the control ends of the first cartridge valve and the second cartridge valve, thereby driving the first cartridge valve and the second cartridge valve to close. Brief Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the hydraulic system of the present utility model.

[0023] Figure 2 is Figure 1 a connection schematic diagram of the first balance valve in Detailed Description of the Preferred Embodiment

[0024] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0025] As Figure 1 - Figure 2 shown, a control hydraulic system for a winch includes a first cartridge valve 1 and a second cartridge valve 2. The A port of the first cartridge valve 1 is connected to the first oil return port 31 of the oil tank 3, the B port of the first cartridge valve 1 is connected to the second port 41 of the motor 4, the A port of the second cartridge valve 2 is connected to the second oil return port 32 of the oil tank 3, and the B end of the second cartridge valve 2 is connected to the second port 41 of the motor 4; the first port 42 of the motor 4 is connected to the first oil outlet 33 and the second oil outlet 34 of the oil tank 3. The first oil outlet 33 is also connected to the control end 21 of the second cartridge valve 2, and the second oil outlet 34 is also connected to the control end 11 of the first cartridge valve 1; the first oil outlet 31 of the oil tank 3 is connected to the control end 21 of the second cartridge valve 2, and the second oil outlet 34 is connected to the control end 11 of the first cartridge valve 1; the first oil return port 31 is also connected to the control end 21 of the second cartridge valve 2, and the second oil return port 32 is also connected to the control end 11 of the first cartridge valve 1; the hydraulic oil flow rate of the first cartridge valve 1 is higher than that of the second cartridge valve 2.

[0026] A first shuttle valve 12 is provided between the control end 11 of the first cartridge valve 1 and the second oil return port 32. The first port 121 of the first shuttle valve 12 is connected to the second oil return port 32, the second port 122 of the first shuttle valve 12 is connected to the oil tank 3, and the third port 123 of the first shuttle valve 12 is connected to the control end 11 of the first cartridge valve 1. By setting the first shuttle valve 12, the flow direction of the hydraulic oil is controlled, thereby facilitating the control of the first cartridge valve 1.

[0027] A second shuttle valve 22 is provided between the control end 21 of the second cartridge valve 2 and the first oil return port 31. The first port 221 of the second shuttle valve 22 is connected to the first oil return port 31, the second port 222 of the second shuttle valve 22 is connected to the oil tank 3, and the third port 223 of the second shuttle valve 22 is connected to the control end 21 of the second cartridge valve 2. By setting the second shuttle valve 22, the flow direction of the hydraulic oil is controlled, thereby facilitating the control of the second cartridge valve 2.

[0028] A first balance valve 35 is provided between the first oil outlet 33 and the motor 4. The first balance valve 35 includes a first overflow valve 351 and a first one-way valve 352. The oil inlet end of the first overflow valve 351 is connected to the first port 42 of the motor 4, the oil outlet end of the first overflow valve 351 is connected to the first oil outlet 33, the oil inlet end of the first one-way valve 352 is connected to the first oil outlet 33, and the oil outlet end of the first one-way valve 352 is connected to the first port 42 of the motor 4; the control end 3511 of the first overflow valve 351 is connected to the first oil return port 31. By providing the first balance valve 35, the pressure of the hydraulic oil flowing from the first oil outlet 33 to the motor 4 is made stable.

[0029] A second balance valve 36 is provided between the second oil outlet 34 and the motor 4. The second balance valve 36 includes a second overflow valve 361 and a second one-way valve 362. The oil inlet end of the second overflow valve 361 is connected to the first port 42 of the motor 4, the oil outlet end of the second overflow valve 361 is connected to the second oil outlet 34, the oil inlet end of the second one-way valve 362 is connected to the second oil outlet 34, and the oil outlet end of the second one-way valve 362 is connected to the first port 42 of the motor 4; the control end 3611 of the second overflow valve 361 is connected to the second oil return port 32; by providing the second balance valve 36, the pressure of the hydraulic oil flowing from the second oil outlet 34 to the motor 4 is made stable.

[0030] A third shuttle valve 23 is further provided between the first oil outlet 33 and the second shuttle valve 22. The first port 231 of the third shuttle valve 23 is connected to the first oil outlet 33, the second port 232 of the third shuttle valve 23 is connected to the first oil return port 31, and the third port 233 of the third shuttle valve 23 is connected to the first port 221 of the second shuttle valve 22. By the flow of hydraulic oil to the third shuttle valve 23, the first port 231 and the third port 233 of the third shuttle valve 23 are driven to communicate, so that the hydraulic oil flows through the third shuttle valve 23 to the second shuttle valve 22 and flows into the control end 21 of the second cartridge valve 2 through the second shuttle valve 22, driving the second cartridge valve 2 to close.

[0031] A fourth shuttle valve 24 is further provided between the second oil outlet 34 and the first shuttle valve 12. The first port 241 of the fourth shuttle valve 24 is connected to the second oil outlet 34, the second port 242 of the fourth shuttle valve 24 is connected to the first oil outlet 33, and the third port 243 of the fourth shuttle valve 24 is connected to the first port 121 of the first shuttle valve 12; by the flow of hydraulic oil to the fourth shuttle valve 24, the first port 241 and the third port 243 of the fourth shuttle valve 24 are driven to communicate, so that the hydraulic oil flows through the fourth shuttle valve 24 to the first shuttle valve 12 and flows into the control end 11 of the first cartridge valve 1 through the first shuttle valve 12, driving the first cartridge valve 1 to close.

[0032] A manual oil pump 39 is provided between the second port 122 of the first shuttle valve 12, the second port 222 of the second shuttle valve 22 and the fuel tank 3. Through the arrangement of the manual oil pump 39, when maintenance and repair of the oil circuit are required, the manual oil pump 39 can suck hydraulic oil into the control ends of the first cartridge valve 1 and the second cartridge valve 2, thereby driving the first cartridge valve 1 and the second cartridge valve 2 to close.

[0033] The working principle of the present utility model: By providing two cartridge valves with different flow rates, when low-speed lifting and lowering are required, the low-flow cartridge valve is used for driving. When high speed is needed, the high-flow cartridge valve is used. And when one of the cartridge valves is used for driving, a branch can be separated from the normally flowing oil circuit to control and close the other cartridge valve, so that the two cartridge valves do not interfere with each other, ensuring that high and low speed control will not be hindered by the other cartridge valve and unable to perform high and low speed control, thus enabling the high and low speed of the winch to be controlled through a simple oil circuit.

[0034] When high and low speed control of the winch is required, for low-speed lifting of the winch: The fuel tank 3 discharges oil from the second oil outlet 34, and the oil circuit of the hydraulic oil is divided into two paths. One path of hydraulic oil enters the motor 4 through the first port 42 of the motor 4. The other path of hydraulic oil passes through the fourth shuttle valve 24 and then enters the first port 121 of the first shuttle valve 12 and then flows to the control end 11 of the first cartridge valve 1, driving the first cartridge valve 1 to close. The hydraulic oil flowing into the motor 4 flows out from the second port 41 of the motor 4 and returns to the fuel tank 3 through the B end of the second cartridge valve 2 from the second oil return port 32, thereby driving the motor 4 to rotate for low-speed lifting.

[0035] For high-speed lifting of the winch: The fuel tank 3 discharges oil from the first oil outlet 33, and the oil circuit of the hydraulic oil is divided into two paths. One path of hydraulic oil enters the motor 4 through the first port 42 of the motor 4. The other path of hydraulic oil flows through the third shuttle valve 23 to the control end 21 of the second cartridge valve 2, driving the second cartridge valve 2 to close. The hydraulic oil flowing into the motor 4 flows out from the second port 41 of the motor 4 and returns to the fuel tank 3 through the B end of the first cartridge valve 1 from the first oil return port 31, thereby driving the motor 4 to rotate for high-speed lifting.

[0036] Low-speed descent of the winch: The oil tank 3 discharges oil from the second oil return port 32, and the oil circuit of the hydraulic oil is divided into three paths. One path of hydraulic oil enters the second cartridge valve 2 through the A end of the second cartridge valve 2 and flows through the B end of the second cartridge valve 2 to the second port 41 of the motor 4. Another path of hydraulic oil flows to the control end 11 of the first cartridge valve 1 to drive the first cartridge valve 1 to close. The hydraulic oil flowing into the motor 1 flows out from the first port 42 of the motor 1 and flows back to the oil tank 3 through the second oil outlet 34, thereby driving the motor 4 to rotate for low-speed descent. The third path of hydraulic oil flows to the control end 3611 of the second overflow valve 361. The second overflow valve 361 opens, and the second oil inlet 34 is communicated with the first port 42 of the motor 4, and the hydraulic oil flows back to the oil tank from the second oil outlet 34.

[0037] High-speed descent of the winch: The oil tank 3 discharges oil from the first oil return port 31, and the oil circuit of the hydraulic oil is divided into three paths. One path of hydraulic oil enters the first cartridge valve 1 through the A end of the first cartridge valve 1 and flows through the B end of the first cartridge valve 1 to the second port 41 of the motor 4. Another path of hydraulic oil flows to the control end 21 of the second cartridge valve 2 to drive the second cartridge valve 2 to close. The hydraulic oil flowing into the motor 4 flows out from the first port 42 of the motor 4 and flows back to the oil tank 3 through the first oil outlet 33, thereby driving the motor 4 to rotate for high-speed descent. The third path of hydraulic oil flows to the control end 3511 of the first overflow valve 351. The first overflow valve 351 opens, and the first oil inlet 33 is communicated with the first port 42 of the motor 4, and the hydraulic oil flows back to the oil tank from the first oil outlet 33.

Claims

1. A winch control hydraulic system, characterized in that: It includes a first cartridge valve and a second cartridge valve, wherein the A port of the first cartridge valve is connected to the first oil return port of the oil tank, the B port of the first cartridge valve is connected to the second port of the motor, the A port of the second cartridge valve is connected to the second oil return port of the oil tank, and the B end of the second cartridge valve is connected to the second port of the motor; the first port of the motor is connected to the first oil outlet and the second oil outlet of the oil tank, the first oil outlet is also connected to the control end of the second cartridge valve, and the second oil outlet is also connected to the control end of the first cartridge valve; the first oil outlet of the oil tank is connected to the control end of the second cartridge valve, and the second oil outlet is connected to the control end of the first cartridge valve; the first oil return port is also connected to the control end of the second cartridge valve, and the second oil return port is also connected to the control end of the first cartridge valve; the hydraulic oil flow rate of the first cartridge valve is higher than the hydraulic oil flow rate of the second cartridge valve.

2. A winch control hydraulic system according to claim 1, characterized in that: A first shuttle valve is provided between the control end of the first cartridge valve and the second oil return port, wherein the first port of the first shuttle valve is connected to the second oil return port, the second port of the first shuttle valve is connected to the oil tank, and the third port of the first shuttle valve is connected to the control end of the first cartridge valve.

3. A winch control hydraulic system according to claim 2, characterized in that: A second shuttle valve is provided between the control end of the second cartridge valve and the first oil return port, the first port of the second shuttle valve is connected to the first oil return port, the second port of the second shuttle valve is connected to the oil tank, and the third port of the second shuttle valve is connected to the control end of the second cartridge valve.

4. A winch control hydraulic system according to claim 1, characterized in that: A first balancing valve is provided between the first oil outlet and the motor, the first balancing valve comprises a first overflow valve and a first check valve, the oil inlet end of the first overflow valve is connected to the first port of the motor, the oil outlet end of the first overflow valve is connected to the first oil outlet, the oil inlet end of the first check valve is connected to the first oil outlet, and the oil outlet end of the first check valve is connected to the first port of the motor; the control end of the first overflow valve is connected to the first oil return port.

5. The winch control hydraulic system according to claim 1, characterized in that: A second balancing valve is provided between the second oil outlet and the motor, the second balancing valve includes a second overflow valve and a second one-way valve, the oil inlet end of the second overflow valve is connected to the first port of the motor, the oil outlet end of the second overflow valve is connected to the second oil outlet, the oil inlet end of the second one-way valve is connected to the second oil outlet, and the oil outlet end of the second one-way valve is connected to the first port of the motor; the control end of the second overflow valve is connected to the second oil return port.

6. A winch control hydraulic system according to claim 3, characterized in that: A third shuttle valve is also provided between the first oil outlet and the second shuttle valve, wherein the first port of the third shuttle valve is connected to the first oil outlet, the second port of the third shuttle valve is connected to the first oil return port, and the third port of the third shuttle valve is connected to the first port of the second shuttle valve.

7. A winch control hydraulic system according to claim 2, characterized in that: A fourth shuttle valve is also provided between the second oil outlet and the first shuttle valve, wherein the first port of the fourth shuttle valve is connected to the second oil outlet, the second port of the fourth shuttle valve is connected to the first oil outlet, and the third port of the fourth shuttle valve is connected to the first port of the first shuttle valve.

8. A winch control hydraulic system according to claim 3, characterized in that: A manual oil pump is provided between the second port of the first shuttle valve, the second port of the second shuttle valve and the oil tank.

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