A hydraulic control system for a large ship installation platform

Abstract

A hydraulic control system for a large ship installation platform includes two groups of hydraulic pumps, the high-pressure hydraulic oil output port of the hydraulic pump is connected to the P1 port of the main proportional reversing valve group through the first overflow valve and the first check valve, the load feedback port of the first hydraulic pump is connected to the LS port of the main proportional reversing valve group, the outlet of the first proportional valve is respectively connected to two groups of longitudinal translation hydraulic cylinders, the outlet of the second proportional valve is respectively connected to the two groups of main jacking hydraulic cylinders on the left, the outlet of the third proportional valve is respectively connected to the two groups of main jacking hydraulic cylinders on the right, the outlet of the fourth proportional valve is respectively connected to four groups of feeding hydraulic cylinders, the outlet of the fifth proportional valve is respectively connected to two groups of longitudinal tilting hydraulic cylinders; the outlet of the sixth proportional valve is respectively connected to four groups of motors. The system can ensure that the speed and position of the extension or retraction of the hydraulic cylinder are accurately and flexibly controlled as required, so as to meet the installation and position adjustment of heavy-load equipment on the outer bottom of the ship, and improve the installation accuracy and work efficiency of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of ship control systems, and in particular relates to a hydraulic control system for a mounting platform for large ships. Background Art

[0002] With the rapid development of the shipping industry, there are more and more large ships, and the propulsion devices they use are getting bigger and bigger. The dock crane cannot reach the bottom of the ship to lift the propulsion device, so flatbed trolleys or hand winches are used. The installation methods are backward and time-consuming, and the safety cannot be guaranteed.

[0003] Most of the propulsion devices of large ships weigh more than 200 tons, and the auxiliary platform on the platform weighs about 100 tons, so the load capacity of the installation platform must be greater than 300 tons. In particular, it needs to move forward and backward, left and right, and generate rear tilt angles and left and right tilt angles. At the same time, the position accuracy of the propulsion device for the hull does not exceed 2mm, so the hydraulic control requirements of the platform are relatively high. It is necessary to use a hydraulic motor to drive the wheel hub to enable the platform to move forward and backward; the lateral hydraulic cylinder in the platform completes the left and right adjustment of the auxiliary platform; the lifting hydraulic cylinder of the main platform completes the lifting of the propulsion device close to the hull installation port; the rear tilt angle hydraulic cylinder completes the rear angle change of the auxiliary platform in the platform; the lifting hydraulic cylinder lifts on one side to complete the left and right tilt angle change. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a hydraulic control system for a mounting platform for large ships, which can ensure the required precise and flexible control of the speed and position of the extension or retraction of the hydraulic cylinder, thereby meeting the requirements of the installation and position adjustment of heavy-loaded equipment on the outer bottom of the ship and improving the installation accuracy and work efficiency of the equipment.

[0005] The present invention provides a hydraulic control system for a mounting platform for a large ship, comprising two groups of hydraulic pumps, wherein a high-pressure hydraulic oil output port of the hydraulic pump is connected to a P1 port of a main proportional reversing valve group through a first overflow valve and a first non-return valve, a load feedback port of the first hydraulic pump is connected to an LS port of the main proportional reversing valve group, an outlet of a first-link proportional valve of the main proportional reversing valve group is respectively connected to two groups of longitudinal translation hydraulic cylinders, an outlet of a second-link proportional valve of the proportional reversing valve group is respectively connected to two groups of main lifting hydraulic cylinders on the left, an outlet of a third-link proportional valve of the proportional reversing valve group is respectively connected to two groups of main lifting hydraulic cylinders on the right, an outlet of a fourth-link proportional valve of the proportional reversing valve group is respectively connected to four groups of feeding hydraulic cylinders, an outlet of a fifth-link proportional valve of the proportional reversing valve group is respectively connected to two groups of longitudinal tilting hydraulic cylinders; and an outlet of a sixth-link proportional valve of the proportional reversing valve group is respectively connected to four groups of motors.

[0006] As a further technical solution of the present invention, the outlet of the first proportional valve is connected to two groups of longitudinal translation hydraulic cylinders through a diverter motor, the outlet of the second proportional valve is connected to two groups of main lifting hydraulic cylinders on the left through a diverter motor, the outlet of the third proportional valve is connected to two groups of main lifting hydraulic cylinders on the right through a diverter motor, the outlet of the fourth proportional valve is connected to four groups of feed hydraulic cylinders respectively through a diverter motor, and the outlet of the fifth proportional valve is connected to two groups of longitudinal tilt hydraulic cylinders through a diverter motor.

[0007] Furthermore, a balancing valve is installed at the oil port of the longitudinal translation hydraulic cylinder, a balancing valve is installed at the oil port of the main jacking hydraulic cylinder, a balancing valve is installed at the oil ports of the right and left main jacking hydraulic cylinders, a balancing valve is installed at the oil port of the feed hydraulic cylinder, a balancing valve is installed at the oil port of the longitudinal tilt hydraulic cylinder, and a balancing valve is installed at the two oil ports of the motor.

[0008] Furthermore, it also includes an accumulator, which is connected to the main proportional reversing valve group.

[0009] The advantages of the present invention are: 1. It adopts hydraulic electrical control technology, and the position of the hydraulic cylinder piston is fed back to the proportional reversing valve after detection, and the movement of the hydraulic cylinder is controlled by the flow; 2. The hydraulic system is controlled by a balance valve to ensure that the hydraulic cylinder stops at the correct position; 3. The accumulator can keep the system pressure stable when the pump is stopped; 4. The diverter motor ensures that the flow is evenly distributed to each hydraulic cylinder controlled by the proportional valve, so that the movement speed of the hydraulic cylinder is consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the hydraulic schematic diagram of this system. DETAILED DESCRIPTION

[0011] See also Figure 1 The present embodiment provides a hydraulic control system for a mounting platform for a large ship, comprising a hydraulic pump 1 and a standby hydraulic pump 2. The high-pressure hydraulic oil output port of the hydraulic pump 1 is connected to the P1 port of the main proportional reversing valve group 3 through a first overflow valve and a first check valve. The load feedback port of the first hydraulic pump is connected to the LS port of the main proportional reversing valve group. The outlets of the first proportional valve of the main proportional reversing valve group 3 are respectively connected to two groups of longitudinal translation hydraulic cylinders 4, the outlets of the second proportional valve of the proportional reversing valve group 3 are respectively connected to two groups of main lifting hydraulic cylinders 5 on the left, the outlets of the third proportional valve of the proportional reversing valve group 3 are respectively connected to two groups of main lifting hydraulic cylinders 6 on the right, the outlets of the fourth proportional valve of the proportional reversing valve group 3 are respectively connected to four groups of feeding hydraulic cylinders 7, the outlets of the fifth proportional valve of the proportional reversing valve group 3 are respectively connected to two groups of longitudinal tilting hydraulic cylinders 8; the outlets of the sixth proportional valve of the proportional reversing valve group 3 are respectively connected to four groups of motors 9.

[0012] The outlet of the first proportional valve is connected to two groups of longitudinal translation hydraulic cylinders 4 through a shunt motor, the outlet of the second proportional valve is connected to two groups of main lifting hydraulic cylinders 5 on the left through a shunt motor, the outlet of the third proportional valve is connected to two groups of main lifting hydraulic cylinders 6 on the right through a shunt motor, the outlet of the fourth proportional valve is connected to four groups of feed hydraulic cylinders 7 through a shunt motor, and the outlet of the fifth proportional valve is connected to two groups of longitudinal tilt hydraulic cylinders 8 through a shunt motor.

[0013] A balancing valve is installed at the oil port of the longitudinal translation hydraulic cylinder 4, a balancing valve is installed at the oil port of the main jacking hydraulic cylinder 6, a balancing valve is installed at the oil ports of the right and left main jacking hydraulic cylinders, a balancing valve is installed at the oil port of the feed hydraulic cylinder 7, and a balancing valve is installed at the oil port of the longitudinal tilt hydraulic cylinder 8, so as to complete the short-term pressure maintenance and buffering of the hydraulic cylinders, and a balancing valve is installed at the two oil ports of the motor 9, so as to complete the buffering of the motor 9.

[0014] The utility model also comprises an accumulator, which is connected with the main proportional reversing valve group.

[0015] The spare hydraulic pump 2 is a constant pressure variable displacement pump.

[0016] Each hydraulic cylinder or motor controlled by a linkage should work independently and should not work simultaneously when not necessary; since the hydraulic cylinders are equipped with position sensors, the working position of the hydraulic cylinders and the running speed under the corresponding flow rate can be obtained timely and accurately. At the same time, the proportional reversing valve can well control the flow input into each group of hydraulic cylinders, so that the entire platform can smoothly move the required propellers and other equipment to the accurate position in a short time. The entire hydraulic system is equipped with an accumulator, which can well prevent the oil in the lower chamber from sliding down due to leakage when the hydraulic cylinder is working, and avoid the danger of the entire platform under load.

[0017] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above specific embodiments. The above specific embodiments and the description in the specification are only for further illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the claims and their equivalents.

Claims

1. A hydraulic control system for a large ship mounting platform, characterized in that: It comprises two groups of hydraulic pumps, one main and one standby. The high-pressure hydraulic oil output port of the hydraulic pump is connected to the P1 port of the main proportional reversing valve group through the first overflow valve and the first non-return valve. The load feedback port of the first hydraulic pump is connected to the LS port of the main proportional reversing valve group. The outlets of the first proportional valve of the main proportional reversing valve group are respectively connected to two groups of longitudinal translation hydraulic cylinders, the outlets of the second proportional valve of the proportional reversing valve group are respectively connected to the two groups of main lifting hydraulic cylinders on the left, the outlets of the third proportional valve of the proportional reversing valve group are respectively connected to the two groups of main lifting hydraulic cylinders on the right, the outlets of the fourth proportional valve of the proportional reversing valve group are respectively connected to four groups of feed hydraulic cylinders, the outlets of the fifth proportional valve of the proportional reversing valve group are respectively connected to two groups of longitudinal tilt hydraulic cylinders; the outlets of the sixth proportional valve of the proportional reversing valve group are respectively connected to four group of motors; the outlet of the first proportional valve is connected to the two groups of longitudinal translation hydraulic cylinders through a shunt motor, the outlet of the second proportional valve is connected to the two groups of main lifting hydraulic cylinders on the left through a shunt motor, the outlet of the third proportional valve is connected to the two groups of main lifting hydraulic cylinders on the right through a shunt motor, the outlet of the fourth proportional valve is connected to four groups of feed hydraulic cylinders respectively through a shunt motor, and the outlet of the fifth proportional valve is connected to two groups of longitudinal tilt hydraulic cylinders through a shunt motor; a balancing valve is installed at the oil port of the longitudinal translation hydraulic cylinder, a balancing valve is installed at the oil port of the main lifting hydraulic cylinder, balancing valves are installed at the oil ports of the right and left main lifting hydraulic cylinders, a balancing valve is installed at the oil port of the feed hydraulic cylinder, a balancing valve is installed at the oil port of the longitudinal tilt hydraulic cylinder, and a balancing valve is installed at the two oil ports of the motor.

2. A large ship mounting platform hydraulic control system according to claim 1, characterized in that: It also includes an accumulator, which is connected to the main proportional reversing valve group.

3. According to the large ship mounting platform hydraulic control system of claim 1, the spare hydraulic pump is a constant pressure variable displacement pump.

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