Hydraulic winch control system

Abstract

The invention discloses a hydraulic winch control system which comprises a hydraulic winch, an upward lifting oil way, a downward lifting oil way, a first multi-way valve, a floating oil way, an electric proportional overflow valve, a floating electromagnetic valve and a second multi-way valve, the first multi-way valve is connected with the hydraulic winch through the upward lifting oil way and the downward lifting oil way, and a first one-way valve is arranged on the upward lifting oil way; a second one-way valve is arranged on the lowering oil way, one end of the floating oil way is connected with the lifting oil way, the other end of the floating oil way is connected with the lowering oil way, the electric proportional overflow valve and the floating electromagnetic valve are arranged on the floating oil way, a third one-way valve is arranged between the electric proportional overflow valve and the lowering oil way, and the second multi-way valve is connected with the floating oil way through a fourth one-way valve. Wherein the third one-way valve and the floating electromagnetic valve can prevent high-pressure oil from impacting the electric proportional overflow valve, and in the floating mode state, the second multi-way valve participates in work and provides upward reverse lifting pulling force for the hydraulic winch, so that it is guaranteed that a steel wire rope is not disordered, and then stable operation of the hydraulic winch is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of winches, and in particular to a hydraulic winch control system. Background Art

[0002] A winch is a traction and lifting device that is widely used in mechanical equipment. Depending on the working conditions, the winch has a variety of auxiliary functions, such as winch floating, micro-speed control and free hook drop.

[0003] In the prior art, the floating of the winch is achieved by adding a connecting pipeline between the upper and lower oil ports on the oil port behind the hydraulic motor balance valve, assisted by a pipeline on-off device, reducer unlocking, passive oil replenishment, etc. In this scheme, the floating speed mainly depends on the diameter of the connecting pipeline and the size of the load. The larger the diameter and load of the connecting pipeline, the faster the floating speed, which cannot be adjusted in real time during actual use. Oil replenishment is generally performed by adding a back pressure valve to the return oil pipeline to increase the return oil pressure and perform passive oil replenishment. A faster floating speed can easily cause insufficient oil replenishment, resulting in the hydraulic motor sucking air, the reducer stalling, and large impacts that affect the service life of the components. The wire rope is also prone to tangling, which may even cause safety accidents in severe cases. When the floating speed is slow, the construction efficiency is low, increasing the cost of equipment use.

[0004] Therefore, how to improve the operating stability of the hydraulic winch is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic winch control system which can effectively improve the operating stability of the winch.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A hydraulic winch control system comprises: a hydraulic winch, an upper lifting oil circuit, a lowering oil circuit, a first multi-way valve, a floating oil circuit, an electric proportional relief valve, a floating solenoid valve and a second multi-way valve, wherein the first multi-way valve is connected to the hydraulic winch through the upper lifting oil circuit and the lowering oil circuit respectively, a first one-way valve is arranged on the upper lifting oil circuit, a second one-way valve is arranged on the lowering oil circuit, one end of the floating oil circuit is connected to the upper lifting oil circuit, and the other end is connected to the lowering oil circuit, the electric proportional relief valve and the floating solenoid valve are arranged on the floating oil circuit, a third one-way valve is arranged between the electric proportional relief valve and the lowering oil circuit, and the second multi-way valve is connected to the floating oil circuit through a fourth one-way valve.

[0008] In some embodiments, the hydraulic winch control system also includes an oil supply circuit, which is connected to the lifting oil circuit and the lowering oil circuit through a three-position three-way reversing valve. The connection position of the three-position three-way reversing valve and the lifting oil circuit is located between the first one-way valve and the hydraulic winch, and the connection position of the three-position three-way reversing valve and the lowering oil circuit is located between the second one-way valve and the hydraulic winch.

[0009] In some embodiments, the first control oil circuit of the three-position three-way reversing valve is connected to the lifting oil circuit through a first one-way throttle valve, and the connection position between the first one-way throttle valve and the lifting oil circuit is located between the first one-way valve and the first multi-way valve; the second control oil circuit of the three-position three-way reversing valve is connected to the lowering oil circuit through a second one-way throttle valve, and the connection position between the second one-way throttle valve and the lowering oil circuit is located between the second one-way valve and the first multi-way valve.

[0010] In some embodiments, the oil replenishing circuit is connected to the lifting oil circuit through a fifth one-way valve, and is connected to the lowering oil circuit through a sixth one-way valve. The connection position of the fifth one-way valve and the lifting oil circuit is located between the first one-way valve and the first multi-way valve, and the connection position of the sixth one-way valve and the lowering oil circuit is located between the second one-way valve and the first multi-way valve.

[0011] In some embodiments, a secondary overflow valve is connected in parallel to the second multi-way valve.

[0012] In some embodiments, the hydraulic winch includes a hydraulic motor, a wire rope and a pulley, the hydraulic motor is used to retract and release the wire rope, a hook is provided at one end of the wire rope, a tension sensor is provided on the end of the wire rope close to the hook, the pulley is used to support the wire rope, and a pin sensor is provided on the pulley. The tension sensor or the pin sensor is used to detect the load size in real time and feed back to the electric proportional relief valve, and the electric proportional relief valve is used to adjust the tension of the wire rope in real time according to the load size, so that the load is greater than the tension, or the load minus the tension is a constant value, so that the load floats downward at a constant speed.

[0013] Compared with the prior art, the above technical solution has at least the following advantages:

[0014] A hydraulic winch control system provided by the present invention comprises: a hydraulic winch, an upper lifting oil circuit, a lowering oil circuit, a first multi-way valve, a floating oil circuit, an electric proportional relief valve, a floating solenoid valve and a second multi-way valve, wherein the first multi-way valve is connected to the hydraulic winch through the upper lifting oil circuit and the lowering oil circuit respectively, a first check valve is arranged on the upper lifting oil circuit, a second check valve is arranged on the lowering oil circuit, one end of the floating oil circuit is connected to the upper lifting oil circuit, and the other end is connected to the lowering oil circuit, the electric proportional relief valve and the floating solenoid valve are arranged on the floating oil circuit, a third check valve is arranged between the electric proportional relief valve and the lowering oil circuit, and the second multi-way valve is connected to the floating oil circuit through a fourth check valve. Under normal working conditions, the first multi-way valve can deliver hydraulic oil to the upper lifting oil circuit or the lower oil circuit to realize the lifting and lowering of the hydraulic winch, wherein the third check valve and the floating solenoid valve can prevent the impact of high-pressure oil on the electric proportional relief valve, and the fourth check valve can ensure that the hydraulic oil will not be depressurized from the second multi-way valve during normal lifting. In the floating mode, the second multi-way valve starts working to provide the hydraulic winch with upward pulling force to ensure that the wire rope does not get tangled, thereby ensuring the stable operation of the hydraulic winch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the hydraulic principle of a hydraulic winch control system provided in a specific embodiment of the present invention.

[0017] The reference numerals are as follows:

[0018] 1-load, 2-tension sensor, 3-pin sensor, 4-wire rope, 5-hydraulic winch, 6-floating oil circuit, 7-third one-way valve, 8-electric proportional relief valve, 9-floating solenoid valve, 10-fourth one-way valve, 11-relief valve, 12-second multi-way valve, 13-first multi-way valve, 14-lowering oil circuit, 15-lifting oil circuit, 16-second one-way valve, 17-second one-way throttle valve, 18-sixth one-way valve, 19-oil replenishing oil circuit, 20-three-position three-way reversing valve, 21-fifth one-way valve, 22-first one-way throttle valve, 23-first one-way valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Please refer to Figure 1 , Figure 1 A schematic diagram of the hydraulic principle of a hydraulic winch control system provided in a specific embodiment of the present invention.

[0021] A control system of a hydraulic winch 5 provided in an embodiment of the present invention comprises: a hydraulic winch 5, an upper lifting oil circuit 15, a lowering oil circuit 14, a first multi-way valve 13, a floating oil circuit 6, an electric proportional relief valve 8, a floating solenoid valve 9, and a second multi-way valve 12, wherein the hydraulic winch 5 comprises a hydraulic motor and a steel wire rope 4, the hydraulic motor can retract and release the steel wire rope 4, the first multi-way valve 13 is connected to the hydraulic winch 5 through the upper lifting oil circuit 15 and the lowering oil circuit 14, wherein the first multi-way valve 13 is preferably a three-position four-way valve, and the upper lifting oil circuit 15 is connected to the floating solenoid valve 9, and the floating solenoid valve 9 is connected to the floating solenoid valve 9, and the floating solenoid valve 9 is connected to the floating solenoid valve 9, wherein ... wherein the floating solenoid valve 9 is connected to the floating solenoid valve 9, wherein the floating solenoid valve 9 is connected to the floating solenoid valve 9, wherein the floating solenoid valve 9 is connected to the floating solenoid valve 9, wherein the floating solenoid valve 9 is connected to the floating solenoid valve 9, wherein the floating solenoid valve 9 is connected to the floating solenoid valve 9, wherein the floating solenoid valve 9 is connected to the floating A first one-way valve 23 is provided, and a second one-way valve 16 is provided on the lowering oil circuit 14. One end of the floating oil circuit 6 is connected to the lifting oil circuit 15, and the connection position is located between the hydraulic winch 5 and the first one-way valve 23. The other end is connected to the lowering oil circuit 14, and the connection position is located between the hydraulic winch 5 and the second one-way valve 16. The electric proportional relief valve 8 and the floating solenoid valve 9 are provided on the floating oil circuit 6. A third one-way valve 7 is provided between the electric proportional relief valve 8 and the lowering oil circuit 14. The second multi-way valve 12 is connected to the floating oil circuit 6 through the fourth one-way valve 10.

[0022] In the above embodiment, under normal working conditions, the first multi-way valve 13 can deliver hydraulic oil to the upper oil circuit 15 or the lower oil circuit to realize the upper and lower lifting of the hydraulic winch 5, wherein the third one-way valve 7 and the floating solenoid valve 9 can prevent the impact of high-pressure oil on the electric proportional relief valve 8 under normal working conditions, and the fourth one-way valve 10 can ensure that the hydraulic oil will not be depressurized from the second multi-way valve 12 during normal lifting. When the floating mode is turned on, the reducer Br oil port of the hydraulic winch 5 is unlocked to pass the pressure oil, the reducer brake is turned on, the floating solenoid valve 9 is powered on and opened, and the hydraulic winch 5 floats downward under the action of the gravity G of the load 1. At the same time, the second multi-way valve 12 participates in the work, providing the pulling force F for the hydraulic winch 5 to reverse upward, so as to ensure that the wire rope 4 is not tangled, thereby ensuring the stable operation of the hydraulic winch 5.

[0023] In some embodiments, the control system of the hydraulic winch 5 further includes an oil replenishment circuit 19, which is connected to the lifting oil circuit 15 and the lowering oil circuit 14 through a three-position three-way reversing valve 20. The connection position of the three-position three-way reversing valve 20 and the lifting oil circuit 15 is located between the first one-way valve 23 and the hydraulic winch 5, and the connection position of the three-position three-way reversing valve 20 and the lowering oil circuit 14 is located between the second one-way valve 16 and the hydraulic winch 5. The oil replenishment circuit 19 can be used to replenish a certain amount of additional oil to the hydraulic motor to prevent the hydraulic motor from sucking air in a floating state.

[0024] In some embodiments, the first control oil circuit of the three-position three-way reversing valve 20 is connected to the lifting oil circuit 15 through the first one-way throttle valve, and the connection position of the first one-way throttle valve and the lifting oil circuit 15 is located between the first one-way valve 23 and the first multi-way valve 13; the second control oil circuit of the three-position three-way reversing valve 20 is connected to the lowering oil circuit 14 through the second one-way throttle valve 17, and the connection position of the second one-way throttle valve 17 and the lowering oil circuit 14 is located between the second one-way valve 16 and the first multi-way valve 13. In addition, the oil replenishing oil circuit 19 is connected to the lifting oil circuit 15 through the fifth one-way valve 21, and is connected to the lowering oil circuit 14 through the sixth one-way valve 18. The connection position of the fifth one-way valve 21 and the lifting oil circuit 15 is located between the first one-way valve 23 and the first multi-way valve 13, and the connection position of the sixth one-way valve 18 and the lowering oil circuit 14 is located between the second one-way valve 16 and the first multi-way valve 13.

[0025] In some embodiments, a secondary relief valve 11 is connected in parallel to the second multi-way valve 12. Specifically, the pressure value of the secondary relief valve 11 can be set by calculating the maximum gravity of the load 1, so that the reverse lifting force is within a certain range. Specifically, the flow paths of the third one-way valve 7, the electric proportional relief valve 8 and the floating solenoid valve 9 can be determined according to the floating speed required by the design.

[0026] In some embodiments, the hydraulic winch 5 also includes a pulley, which is used to support a wire rope 4. A hook is provided at one end of the wire rope 4, and the other end is connected to a hydraulic motor. A tension sensor 2 is provided on the end of the wire rope 4 close to the hook, and a pin sensor 3 is provided on the pulley. The tension sensor 2 or the pin sensor 3 is used to detect the size of the load 1 in real time and feed it back to the electric proportional relief valve 8. The electric proportional relief valve 8 is used to adjust the tension of the wire rope 4 in real time according to the size of the load 1, so that the load 1 is greater than the tension, or the load 1 minus the tension is a constant value, so that the load 1 floats downward at a uniform speed, thereby reducing the impact, thereby extending the service life of each component and reducing the probability of safety accidents.

[0027] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0028] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0029] The above is a detailed introduction to a hydraulic winch control system provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A hydraulic winch control system, characterized in that: include: A hydraulic winch, an upper lifting oil circuit, a lowering oil circuit, a first multi-way valve, a floating oil circuit, an electric proportional relief valve, a floating solenoid valve and a second multi-way valve. The first multi-way valve is connected to the hydraulic winch through the upper lifting oil circuit and the lowering oil circuit respectively. A first one-way valve is provided on the upper lifting oil circuit, and a second one-way valve is provided on the lowering oil circuit. One end of the floating oil circuit is connected to the upper lifting oil circuit, and the other end is connected to the lowering oil circuit. The electric proportional relief valve and the floating solenoid valve are provided on the floating oil circuit. A third one-way valve is provided between the electric proportional relief valve and the lowering oil circuit. The second multi-way valve is connected to the floating oil circuit through a fourth one-way valve.

2. The hydraulic winch control system according to claim 1, characterized in that: The hydraulic winch control system also includes an oil replenishing circuit, which is connected to the lifting oil circuit and the lowering oil circuit through a three-position three-way reversing valve. The connection position of the three-position three-way reversing valve and the lifting oil circuit is located between the first one-way valve and the hydraulic winch, and the connection position of the three-position three-way reversing valve and the lowering oil circuit is located between the second one-way valve and the hydraulic winch.

3. The hydraulic winch control system according to claim 2, characterized in that: The first control oil circuit of the three-position three-way reversing valve is connected to the lifting oil circuit through a first one-way throttle valve, and the connection position of the first one-way throttle valve and the lifting oil circuit is located between the first one-way valve and the first multi-way valve; the second control oil circuit of the three-position three-way reversing valve is connected to the lowering oil circuit through a second one-way throttle valve, and the connection position of the second one-way throttle valve and the lowering oil circuit is located between the second one-way valve and the first multi-way valve.

4. The hydraulic winch control system according to claim 3, characterized in that: The oil replenishing circuit is connected to the lifting oil circuit through the fifth one-way valve, and is connected to the lowering oil circuit through the sixth one-way valve. The connection position of the fifth one-way valve and the lifting oil circuit is located between the first one-way valve and the first multi-way valve, and the connection position of the sixth one-way valve and the lowering oil circuit is located between the second one-way valve and the first multi-way valve.

5. The hydraulic winch control system according to claim 4, characterized in that: The second multi-way valve is connected in parallel with a secondary overflow valve.

6. The hydraulic winch control system according to any one of claims 1 to 5, characterized in that: The hydraulic winch includes a hydraulic motor, a wire rope and a pulley. The hydraulic motor is used to retract and release the wire rope. A hook is provided at one end of the wire rope. A tension sensor is provided on the end of the wire rope close to the hook. The pulley is used to support the wire rope. A pin sensor is provided on the pulley. The tension sensor or the pin sensor is used to detect the load size in real time and feed back to the electric proportional relief valve. The electric proportional relief valve is used to adjust the tension of the wire rope in real time according to the load size, so that the load is greater than the tension, or the load minus the tension is a constant value, so that the load floats downward at a uniform speed.

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