Follow-up compensation hydraulic system
By designing a follow-up compensation hydraulic system, the connection between the hydraulic circuit and the follow-up oil cylinder and the follow-up pulley and the lifting hook are dynamically adjusted, and the risk of cargo hitting the ship due to the floating of the ship during sea transportation is solved, and the safe floating distance between the cargo and the ship is achieved, ensuring the safety and stability of the lifting process.
Patent Information
- Application Number
- CN202422370580.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-27
AI Technical Summary
During maritime transportation, the up and down movement caused by the ship being affected by the waves causes cargo to easily hit the supply ship when the crane is transferred from one ship to another, causing the risk of cargo damage and personnel injury.
A follow-up compensation hydraulic system is designed, and the hydraulic control oil circuit and the follow-up oil cylinder are connected to the follow-up pulley and the lifting hook to dynamically adjust the position of the lifting hook according to the floating conditions of the ship, and maintain the floating distance between the cargo and the supply ship.
Effectively prevent cargo from directly hitting the ship, reduce the risk of cargo damage and personnel injury, and ensure the safety and stability of the hoisting process.
Smart Images
Figure CN223032902U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crane control systems, and particularly relates to a follow-up compensation hydraulic system. Background Art
[0002] The stability performance of a ship is an important indicator for a country to demonstrate its ship R & D strength, conduct offshore exploration, and engage in dangerous goods marine transportation at sea. Since the driving activities of ships at sea are completely different from those of land equipment, ships will be affected by the irregular undulating motion of waves due to weather factors, causing the entire hull to shake violently up and down, left and right, thus bringing huge hidden dangers to dangerous goods transportation ships; the violent shaking of the hull will cause damage, leakage, explosion and other risks to on-board precision instruments and the dangerous goods being transported. Especially in extremely bad sea conditions, such incidents are very likely to occur, causing great harm to the personnel on board and the natural environment.
[0003] When it is necessary to transfer goods from one ship to another supply ship by a crane, due to the different up and down fluctuations of the two ships respectively caused by sea wind and wave factors, it is very easy for the goods to directly impact the supply ship, resulting in damage to the goods and possibly causing injury to personnel. Summary of the Invention
[0004] The utility model provides a follow-up compensation hydraulic system. Through the control system of the utility model, it is possible to control the action of the lifting hook according to the up and down floating of the ship at sea, preventing the goods from directly impacting the ship.
[0005] To achieve the above object, the technical solution of the utility model is: a follow-up compensation hydraulic system, including a hydraulic control oil circuit and a follow-up oil cylinder. The follow-up oil cylinder is connected to a follow-up pulley block. The follow-up pulley block is slidably arranged on the boom of the crane. The follow-up pulley block is connected to a follow-up hook through a follow-up cable and is connected to a lifting hook through a hoisting cable. The hydraulic control oil circuit includes a follow-up control reversing valve, a first logic valve, a second logic valve, and a first accumulator. One end of the first accumulator is connected to one end of the first logic valve through a first oil circuit, and the other end of the first accumulator is connected to one end of the second logic valve through a second oil circuit. The other end of the first logic valve and the other end of the second logic valve are connected to the rodless end of the follow-up oil cylinder; a follow-up control reversing valve is provided on the second oil circuit. The P port of the follow-up control reversing valve is connected to the second oil circuit, the T port of the follow-up control reversing valve is connected to the oil tank, and the B port of the follow-up control reversing valve is connected to the control ends of the first logic valve and the second logic valve.
[0006] In the above structure, by connecting the follow-up oil cylinder to the follow-up pulley, when transporting goods between the mother ship and the supply ship, the crane drives the lifting hook to lift the goods through the cargo winch. At the same time, the follow-up winch is connected to the supply ship through the follow-up hook. Thus, when the supply ship and the mother ship float up and down due to sea waves, since both the lifting hook and the follow-up hook are connected to the follow-up pulley, the follow-up pulley moves following the floating of the supply ship. While the follow-up pulley moves, it drives the lifting hook to move together. Thereby, the goods lifted by the lifting hook can always maintain a certain floating distance from the supply ship, preventing the goods from directly hitting the ship. When the follow-up pulley moves following the supply ship, it drives the follow-up oil cylinder to perform telescopic movement. At this time, the follow-up control directional valve is electrified and commutated, making the P port of the follow-up control directional valve communicate with the B port. The hydraulic oil in the second oil circuit flows through the follow-up control directional valve to the control ends of the first logic valve and the second logic valve. The first logic valve and the second logic valve open, and the hydraulic oil in the accumulator flows into the rodless end of the follow-up oil cylinder through the first oil circuit and the second oil circuit. When the supply ship sinks, the supply ship pulls the follow-up pulley to move through the follow-up cable. The pressure of the moving follow-up pulley overcomes the external thrust of the follow-up oil cylinder, so that the piston rod of the follow-up oil cylinder is pushed to retract inward, and thus the hydraulic oil in the rodless end of the follow-up oil cylinder is pushed and flows back to the accumulator through the first oil circuit and the second oil circuit. When the supply ship floats up, the pulling force of the follow-up cable between the supply ship and the follow-up pulley becomes smaller, and the oil pressure of the accumulator overcomes the pressure of the moving follow-up pulley. Thus, the accumulator outputs hydraulic oil to the follow-up oil cylinder, and the hydraulic oil flows into the rodless end of the follow-up oil cylinder through the first oil circuit and the second oil circuit, further pushing the piston rod of the follow-up oil cylinder to extend outward, thereby driving the follow-up pulley to move and tighten the follow-up cable, so that the follow-up pulley moves according to the floating of the supply ship. While the follow-up pulley moves, it drives the lifting hook to move together, ensuring that there is always a certain distance between the goods and the supply ship, avoiding accidental collision between the goods and the supply ship, and ensuring the safety of the hoisting process.
[0007] Furthermore, the first accumulator is also connected to the oil tank. A one-way valve is provided between the oil tank and the first accumulator. The inlet end of the one-way valve is connected to the oil tank, and the outlet end of the one-way valve is connected to the first accumulator.
[0008] With the above settings, the hydraulic oil is replenished from the oil tank to the first accumulator to timely replenish the hydraulic oil in the first accumulator, and through the setting of the one-way valve, the hydraulic oil will not flow back to the oil tank.
[0009] Furthermore, a first safety valve group is also provided between the first accumulator and the first oil circuit and the second oil circuit. The first safety valve group includes a first safety overflow valve and a first safety ball valve. The inlet end of the first safety overflow valve is connected to the first accumulator, the outlet end of the first safety overflow valve is connected to the oil tank, one end of the first safety ball valve is connected to the first accumulator, and the other end of the first safety ball valve is connected to the oil tank. The first safety ball valve is normally closed.
[0010] With the above settings, by setting the safety valve group, when it is necessary to maintain the first accumulator, the first safety ball valve is opened, and thus the hydraulic oil in the first accumulator can be drained back to the oil tank, facilitating the maintenance of the first accumulator.
[0011] Furthermore, a pressure switch is also provided between the first accumulator and the oil tank.
[0012] With the above settings, by setting the pressure switch, when the oil pressure of the hydraulic oil in the first accumulator is insufficient, the pressure switch controls the oil tank to replenish oil.
[0013] Furthermore, the rod end of the servo cylinder is connected to the oil tank through the third oil circuit. A reset reversing valve is provided on the third oil circuit. The P port of the reset reversing valve is connected to the oil inlet end of the oil tank, the T port of the reset reversing valve is connected to the oil return end of the oil tank, and the A port of the reset reversing valve is connected to the rod end of the servo cylinder.
[0014] With the above settings, by setting the third oil circuit, when the servo pulley needs to stop working, the servo cylinder needs to retract the piston rod. By controlling the reset reversing valve to be energized and reversed, the P port of the reset reversing valve is connected to the A port. Thus, the hydraulic oil output from the oil tank flows into the rod end of the servo cylinder through the reset reversing valve, driving the piston rod of the servo cylinder to retract into the cylinder body of the servo cylinder.
[0015] Furthermore, the rodless end of the servo cylinder is also connected to the oil tank through a drain reversing valve. The P port of the drain reversing valve is connected to the rodless end of the servo cylinder, the T port of the drain reversing valve is connected to the oil tank, and the control port of the drain reversing valve is connected to the A port of the reset reversing valve.
[0016] With the above settings, when it is necessary to retract the piston rod of the servo cylinder, the servo control reversing valve changes direction and closes, causing the first logic valve and the second logic valve to close, and the first accumulator cannot deliver hydraulic oil to the rodless end of the servo cylinder; at this time, by controlling the drain reversing valve to change direction, the P port of the drain reversing valve is connected to the T port. Thus, when the piston rod of the servo cylinder retracts, it can push the hydraulic oil to flow back to the oil tank through the drain reversing valve, enabling the piston rod of the servo cylinder to retract into the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the hydraulic system of the present invention.
[0018] Figure 2 It is Figure 1 an enlarged view of part C in DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0020] AsFigure 1 - Figure 2 As shown in the figure, a follow-up compensation hydraulic system includes a hydraulic control oil circuit and a follow-up oil cylinder 2. The follow-up oil cylinder 2 is connected to a follow-up pulley (not shown in the figure). The follow-up pulley is slidably arranged on the boom of the crane (not shown in the figure). The follow-up pulley is connected to the follow-up hook through a follow-up cable and connected to the lifting hook through a lifting cable (not shown in the figure). The hydraulic control oil circuit 1 includes a follow-up control reversing valve 11, a first logic valve 12, a second logic valve 13, and a first accumulator 14. One end of the first accumulator 14 is connected to one end of the first logic valve 12 through a first oil circuit 21, and the other end of the first accumulator 14 is connected to one end of the second logic valve 13 through a second oil circuit 22. The other ends of the first logic valve 12 and the second logic valve 13 are connected to the rodless end 23 of the follow-up oil cylinder 2. A follow-up control reversing valve 11 is provided on the second oil circuit 22. The P port of the follow-up control reversing valve 11 is connected to the second oil circuit 22, the T port of the follow-up control reversing valve 11 is connected to the oil tank 01, and the B port of the follow-up control reversing valve 11 is connected to the control ports of the first logic valve 12 and the second logic valve 13.
[0021] The first accumulator 14 is also connected to the oil tank 01. A one-way valve 011 is provided between the oil tank 01 and the first accumulator 14. The inlet end of the one-way valve 011 is connected to the oil tank 01, and the outlet end of the one-way valve 011 is connected to the first accumulator 14. The hydraulic oil is supplemented to the first accumulator 14 through the oil tank 01 to timely supplement the hydraulic oil in the first accumulator 14. And through the setting of the one-way valve 011, the hydraulic oil will not flow back to the oil tank 01. A pressure switch 012 is also provided between the first accumulator 14 and the oil tank 01. Through the setting of the pressure switch 012, when the oil pressure of the hydraulic oil in the first accumulator 14 is insufficient, the pressure switch 012 controls the oil tank 01 to replenish oil.
[0022] A first safety valve group 15 is also provided between the first accumulator 14 and the first oil circuit 21 and the second oil circuit 22. The first safety valve group 15 includes a first safety overflow valve 151 and a first safety ball valve 152. The inlet end of the first safety overflow valve 151 is connected to the first accumulator 14, the outlet end of the first safety overflow valve 151 is connected to the oil tank 01, one end of the first safety ball valve 152 is connected to the first accumulator 14, and the other end of the first safety ball valve 152 is connected to the oil tank 01. The first safety ball valve 152 is normally closed. Through the setting of the safety valve group, when it is necessary to maintain the first accumulator 14, by opening the first safety ball valve 152, the hydraulic oil in the first accumulator 14 can be drained back to the oil tank 01, so as to facilitate the maintenance of the first accumulator 14.
[0023] The rod end 24 of the follow-up oil cylinder 2 is connected to the oil tank 01 through the third oil circuit 25. A reset reversing valve 26 is provided on the third oil circuit 01. The P port of the reset reversing valve 26 is connected to the oil inlet end of the oil tank 01, the T port of the reset reversing valve 26 is connected to the oil return end of the oil tank 01, and the A port of the reset reversing valve 26 is connected to the rod end 24 of the follow-up oil cylinder 2. By providing the third oil circuit 25, when the follow-up pulley needs to stop working, the follow-up oil cylinder 2 needs to retract the piston rod. By controlling the reset reversing valve 26 to be energized and reversed, the P port of the reset reversing valve 26 is connected to the A port. Thus, the hydraulic oil output from the oil tank 01 flows into the rod end of the follow-up oil cylinder 2 through the reset reversing valve 26, thereby driving the piston rod of the follow-up oil cylinder 2 to retract into the cylinder body of the follow-up oil cylinder 2.
[0024] The rodless end 23 of the follow-up oil cylinder 2 is also connected to the oil tank 01 through a drain reversing valve 27. The P port of the drain reversing valve 27 is connected to the rodless end 23 of the follow-up oil cylinder 2, the T port of the drain reversing valve 27 is connected to the oil tank, and the control port X of the drain reversing valve 27 is connected to the A port of the reset reversing valve 26. When it is necessary to retract the piston rod of the follow-up oil cylinder 2, the follow-up control reversing valve 11 is reversed and closed, so that the first logic valve 12 and the second logic valve 13 are closed, and the first accumulator 14 cannot supply hydraulic oil to the rodless end of the follow-up oil cylinder 2. At this time, by controlling the drain reversing valve 27 to be reversed, the P port of the drain reversing valve 27 is connected to the T port. Thus, when the piston rod of the follow-up oil cylinder 2 retracts, it can push the hydraulic oil to flow back to the oil tank through the drain reversing valve 27, so that the piston rod of the follow-up oil cylinder 2 can retract into the cylinder body.
[0025] Working principle of the utility model: By connecting the follow-up oil cylinder 2 to the follow-up pulley block, when the main ship transports goods to and from the supply ship, the crane drives the lifting hook to lift the goods through the cargo winch. At the same time, the follow-up winch is connected to the supply ship through the follow-up hook. Thus, when the supply ship and the main ship float up and down due to sea waves, since both the lifting hook and the follow-up hook are connected to the follow-up pulley block, the follow-up pulley block moves following the floating of the supply ship. While the follow-up pulley block moves, it drives the lifting hook to move together. As a result, the goods lifted by the lifting hook can always maintain a certain floating distance from the supply ship, thereby preventing the goods from directly hitting the ship. While the follow-up pulley block moves following the supply ship, it drives the follow-up oil cylinder 2 to perform telescopic movement. At this time, the follow-up control reversing valve 11 is energized and reversed, so that the P port of the follow-up control reversing valve 11 is connected to the B port. The hydraulic oil in the second oil circuit 22 flows through the follow-up control reversing valve 11 to the control ends of the first logic valve 12 and the second logic valve 13. The first logic valve 12 and the second logic valve 13 open, and the hydraulic oil of the accumulator flows into the rodless end of the follow-up oil cylinder 2 through the first oil circuit 21 and the second oil circuit 22, providing an outward thrust to the oil cylinder 2. When the supply ship sinks, the supply ship pulls the follow-up pulley block to move through the follow-up cable. The pressure of the movement of the follow-up pulley block overcomes the outward thrust of the follow-up oil cylinder 2, so that the piston rod of the follow-up oil cylinder 2 is pushed to retract inward, and thus the hydraulic oil at the rodless end in the follow-up oil cylinder 2 is pushed and flows back to the accumulator through the first oil circuit 21 and the second oil circuit 22. When the supply ship floats up, the tension of the follow-up cable between the supply ship and the follow-up pulley block becomes smaller, and the oil pressure of the accumulator overcomes the pressure of the movement of the follow-up pulley block. Thus, the accumulator outputs hydraulic oil to the follow-up oil cylinder 2. The hydraulic oil flows into the rodless end of the follow-up oil cylinder 2 through the first oil circuit 21 and the second oil circuit 22, and then pushes the piston rod of the follow-up oil cylinder 2 to extend outward, thereby driving the follow-up pulley block to move and tighten the follow-up cable, so that the follow-up pulley block moves according to the floating of the supply ship. While the follow-up pulley block moves, it drives the lifting hook to move together, ensuring that there is always a certain distance between the goods and the supply ship, avoiding accidental collision between the goods and the supply ship, and ensuring the safety of the hoisting process.
Claims
1. A follow-up compensation hydraulic system, comprising a hydraulic control oil circuit and a follow-up cylinder, wherein the follow-up cylinder is connected to a follow-up pulley, the follow-up pulley is slidably arranged on the boom of a crane, the follow-up pulley is connected to a follow-up hook through a follow-up cable and to a lifting hook through a lifting cable, and is characterized in that: The hydraulic control oil circuit includes a follow-up control reversing valve, a first logic valve, a second logic valve and a first accumulator. On the one hand, the first accumulator is connected to one end of the first logic valve through the first oil circuit, and on the other hand, the first accumulator is connected to one end of the second logic valve through the second oil circuit. The other end of the first logic valve and the other end of the second logic valve are connected to the rodless end of the follow-up cylinder; a follow-up control reversing valve is provided on the second oil circuit, the P end of the follow-up control reversing valve is connected to the second oil circuit, the T end of the follow-up control reversing valve is connected to the oil tank, and the B end of the follow-up control reversing valve is connected to the control ends of the first logic valve and the second logic valve.
2. A follow-up compensation hydraulic system according to claim 1, characterized in that: The first accumulator is also connected to the oil tank. A one-way valve is provided between the oil tank and the first accumulator. The oil inlet end of the one-way valve is connected to the oil tank, and the oil outlet end of the one-way valve is connected to the first accumulator.
3. The follow-up compensation hydraulic system according to claim 1, characterized in that: A first safety valve group is also provided between the first accumulator and the first oil circuit and the second oil circuit. The first safety valve group includes a first safety relief valve and a first safety ball valve. The oil inlet end of the first safety relief valve is connected to the first accumulator, and the oil outlet end of the first safety relief valve is connected to the oil tank. One end of the first safety ball valve is connected to the first accumulator, and the other end of the first safety ball valve is connected to the oil tank. The first safety ball valve is normally closed.
4. A follow-up compensation hydraulic system according to claim 2, characterized in that: A pressure switch is also provided between the first accumulator and the oil tank.
5. The follow-up compensation hydraulic system according to claim 1, characterized in that: The rod end of the follower cylinder is connected to the oil tank through the third oil circuit, and a reset reversing valve is provided on the third oil circuit. The P end of the reset reversing valve is connected to the oil inlet end of the oil tank, the T end of the reset reversing valve is connected to the oil return end of the oil tank, and the A end of the reset reversing valve is connected to the rod end of the follower cylinder.
6. A follow-up compensation hydraulic system according to claim 5, characterized in that: The rodless end of the follower cylinder is also connected to the oil tank through an oil leakage reversing valve, the P end of the oil leakage reversing valve is connected to the rodless end of the follower cylinder, the T end of the oil leakage reversing valve is connected to the oil tank, and the control end of the oil leakage reversing valve is connected to the A end of the reset reversing valve.