Connecting method of double-lifting quay crane sling upper frame hydraulic system

Abstract

The invention provides a connecting method for a hydraulic system of a double-lifting quay crane lifting appliance upper frame, and belongs to the technical field of port loading and unloading. The connecting method comprises the following steps that 1, main valve oil pipes on hydraulic power stations of a seaside upper frame and a landside upper frame are connected to a lifting appliance hydraulic oil tank; 2, the lifting appliance is put on an oil tank and a motor to serve as standby power; 3, forcibly keeping pressurization work of a land side lifting appliance upper frame high-pressure valve; and 4, disconnecting the lifting appliance pump contactor so that the lifting appliance pump contactor is not controlled by the landside anchoring and the landside selection button. The hydraulic system connecting method has the beneficial effects that by optimizing the double-lifting quay crane lifting appliance racking hydraulic system, the quay crane can more efficiently carry out loading and unloading operation of containers, and by reducing repeated configuration of the hydraulic system, the weight of the lifting appliance is reduced, so that the loading and unloading operation speed and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of port loading and unloading, and in particular to a method for connecting a double-lifting quay crane hoisting device upper hydraulic system. Background Art

[0002] With the development of container transportation, in order to achieve efficient loading and unloading of container ships at port terminals, more and more new technologies are applied to quay cranes. Compared with the previous single-lift quay cranes, double-lift quay cranes have greatly improved the loading and unloading efficiency of containers. However, the existing double-lift quay crane hoisting hydraulic system has some shortcomings: 1. Weight problem: In order to realize the interlocking operation of double spreaders, the sea side frame and the land side frame are equipped with independent hydraulic power stations, which greatly increases the weight of the spreader, thus affecting the lifting speed of the quay crane and the overall work efficiency.

[0003] 2. Energy consumption: Two independent hydraulic power stations mean higher energy consumption. With the rising cost of electricity, how to reduce energy consumption has become a problem that port operators need to consider.

[0004] 3. Maintenance complexity: The maintenance and overhaul of the two hydraulic systems increases the workload of maintenance personnel and also increases maintenance costs.

[0005] 4. Operational complexity: Operators need to be familiar with the operating procedures of two hydraulic systems, which increases the complexity of operation and the possibility of errors.

[0006] 5. Safety issues: In the existing hydraulic system, due to the complexity of electrical limit protection and hydraulic cylinder control, there are certain safety hazards, especially in the process of docking and separation of spreaders.

[0007] In order to solve the above problems, the present invention proposes a connection method for the hydraulic system of a double-lifting quay crane hoist, which can improve loading and unloading efficiency, reduce energy consumption, simplify maintenance and operation procedures, and improve the safety and reliability of the system. Summary of the invention

[0008] In view of the problems existing in the use of the current double-shore crane hoist, the present invention proposes a connection method for the hydraulic system of the double-lifting shore crane hoist, which can improve the loading and unloading efficiency, reduce energy consumption, simplify the maintenance and operation process, and improve the safety and reliability of the system.

[0009] In order to achieve the above object, the present invention proposes a method for connecting a hydraulic system of a double-lifting quay crane hoist, comprising the following steps: Step 1: Connect the main valve oil pipes on the hydraulic power station of the seaside upper frame and the landside upper frame to the hydraulic oil tank of the spreader through the hydraulic quick connector; Step 2: Put the oil tank and motor on the hoist for use as backup power; Step 3: Force the high-pressure valve on the landside spreader to maintain pressurization; Step 4: Disconnect the spreader pump contactor so that it is not controlled by the landside anchor and landside selection buttons.

[0010] Furthermore, step 1 is specifically as follows: Step 1.1: Connect the main valve oil pipe of the hydraulic power station on the sea side; Step 1.2: Connect the main valve oil pipe of the hydraulic power station on the land side; Step 1.3: Make sure the hydraulic quick connector is installed correctly; Step 1.4: Check the tightness of the hydraulic system connections; Step 1.5: Perform a pressure test on the hydraulic system.

[0011] Furthermore, step 3 is specifically as follows: Step 3.1: Modify the high-pressure valve program segment of the sea-side hoisting device to make it long-open; Step 3.2: Ensure that the system runs stably after the program is modified; Step 3.3: Perform system testing after program modification; By changing the land-side spreader high-pressure valve to a long-pass state to force the land-side spreader high-pressure valve to maintain pressurization, it is ensured that the spreader clamp can maintain sufficient working pressure under any circumstances, thereby improving the stability and safety of the system.

[0012] Further, in step 4, the operation of disconnecting the spreader pump contactor includes: Step 4.1: Disconnect the landside spreader upper pump contactor; Step 4.2: Disconnect the sea side spreader upper pump contactor; Step 4.3: Ensure safe operation of the system after disconnection operation; Improves system safety and prevents system failures caused by misoperation.

[0013] Furthermore, the lifting device includes a main beam, telescopic beams are installed at both ends of the main beam, a guide plate is fixed to the top of the telescopic beam, an intermediate lifting point is arranged at the bottom of the main beam, and a hydraulic component is installed on the top of the main beam.

[0014] Furthermore, the hydraulic assembly includes a hydraulic oil tank, a rack oil tank and a motor, and the hydraulic oil tank is connected to the hydraulic power station of the sea side rack and the land side rack through pipelines.

[0015] Furthermore, the telescopic beam is in a U shape, and one open end is plugged into the main beam.

[0016] Furthermore, there are four guide plates, which are respectively fixed at ends of the two telescopic beams that are away from each other, and the four guide plates are symmetrically arranged.

[0017] The beneficial effects of the present invention are: 1. Improve loading and unloading efficiency: The present invention optimizes the hydraulic system of the double-lifting quay crane hoist, so that the quay crane can load and unload containers more efficiently. By reducing the repeated configuration of the hydraulic system, the weight of the hoist is reduced, thereby improving the speed and efficiency of the loading and unloading operation.

[0018] 2. Reduce energy consumption: The improved system reduces the number of hydraulic power stations and reduces electricity consumption. Due to the optimization of the hydraulic system, energy loss is reduced, energy conservation and emission reduction are achieved, which is in line with the development trend of green environmental protection.

[0019] 3. Simplified maintenance and operation: By integrating the hydraulic system, the configuration of the hydraulic power station is simplified, making maintenance work more convenient and reducing maintenance costs and time. At the same time, the simplified operating process also reduces the difficulty of operator training and the possibility of operating errors.

[0020] 4. Enhanced system reliability: By optimizing the PLC program, the stable operation of the hydraulic system is ensured and failures caused by program errors are reduced. In addition, the operation of disconnecting the spreader pump contactor improves the safety and reliability of the system and reduces the risk of unexpected downtime.

[0021] 5. Extend the service life of equipment: Reducing the weight of the hoisting device reduces the stress on the quay crane structure, which helps to extend the service life of the equipment. At the same time, the optimized hydraulic system reduces wear and tear, further extending the maintenance cycle and service life of the equipment.

[0022] 6. Improved safety: The improved system improves the safety of operation through electrical limit protection and precise control of the hydraulic cylinder, especially during the docking process, by precisely controlling the movement of the hydraulic cylinder to ensure the accuracy and safety of the docking.

[0023] 7. Flexibility and adaptability: The improvement measures of the present invention are not only applicable to the existing double-lift quay crane, but also easy to be integrated into the design of new quay cranes. It has good flexibility and adaptability, which makes the present invention widely applicable to different port and terminal environments.

[0024] 8. Significant economic benefits: by improving loading and unloading efficiency and reducing energy consumption, maintenance costs are reduced and the service life of equipment is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the sling of the present invention.

[0027] In the figure: 1. Telescopic beam; 2. Middle lifting point; 3. Main beam; 4. Guide plate; 5. Hydraulic assembly. DETAILED DESCRIPTION

[0028] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0029] like Figure 1 As shown, in this embodiment, the present invention proposes a connection method for the hydraulic system of a double-lifting quay crane hoist, including using a hydraulic quick connector to connect the main valve oil pipes on the hydraulic power station for the sea-side hoist and the land-side hoist to the hoist hydraulic oil tank, so as to achieve an optimized configuration of the hydraulic system. At the same time, the hoist tank and the motor are used as backup power to reduce the weight of the double hoist and improve the working efficiency of the quay crane. Finally, the PLC program is modified to force the pressurization of the high-pressure valve on the land-side hoist to be maintained to ensure the working pressure of the hoist clamp; the hoist pump contactor PLC program segment is disconnected so that it is not controlled by the land-side anchoring and the land-side selection button, thereby improving the safety and reliability of the system.

[0030] Specifically, the following steps are included: Step 1: Use hydraulic quick connectors to connect the main valve oil pipes on the hydraulic power station on the sea side and the land side to the hydraulic oil tank of the spreader to achieve optimal configuration of the hydraulic system.

[0031] Step 2: Use the oil tank and motor on the spreader as backup power, which reduces the weight of the double spreaders and improves the working efficiency of the quay crane.

[0032] Step 3: Modify the PLC program, including the following steps: Change the sea-side spreader high-pressure valve program segment to long pass to force the land-side spreader high-pressure valve to maintain pressurization, ensuring that the spreader clamp can maintain sufficient working pressure under any circumstances.

[0033] Step 4: Forcefully disconnect the landside spreader upper pump contactor so that the spreader pump contactor is not controlled by the landside anchoring and landside selection button.

[0034] Through the above transformation, the hydraulic system of the double-lifting spreader was optimized, and the working efficiency and reliability of the quay crane were improved.

[0035] The hoisting device includes a main beam 3, both ends of which are equipped with telescopic beams 1. The telescopic beam 1 is U-shaped, and the open end is plugged into the main beam 3. A guide plate 4 is fixed on the top of the telescopic beam 1. There are four guide plates 4, which are respectively fixed on the ends of the two telescopic beams 1 that are away from each other. The four guide plates 4 are arranged symmetrically. An intermediate lifting point 2 is provided at the bottom of the main beam 3, and a hydraulic assembly 5 is installed on the top of the main beam 3. The hydraulic assembly 5 includes a hydraulic oil tank, a shelf oil tank and a motor. The hydraulic oil tank is connected to the hydraulic power station of the sea side shelf and the land side shelf through pipelines.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for connecting a hydraulic system of a double-lifting quay crane hoist, characterized in that: The following steps are involved: Step 1: Connect the main valve oil pipes on the hydraulic power station of the seaside upper frame and the landside upper frame to the hydraulic oil tank of the spreader through the hydraulic quick connector; Step 2: Put the oil tank and motor on the hoist for use as backup power; Step 3: Force the high-pressure valve on the landside spreader to maintain pressurization; Step 4: Disconnect the spreader pump contactor so that it is not controlled by the landside anchor and landside selection buttons.

2. The method for connecting the hydraulic system of the double-lifting quay crane hoist according to claim 1 is characterized in that: Step 1 is as follows: Step 1.1: Connect the main valve oil pipe of the hydraulic power station on the sea side; Step 1.2: Connect the main valve oil pipe of the hydraulic power station on the land side; Step 1.3: Make sure the hydraulic quick connector is installed correctly; Step 1.4: Check the tightness of the hydraulic system connections; Step 1.5: Perform a pressure test on the hydraulic system.

3. The method for connecting the hydraulic system of the double-lifting quay crane hoist according to claim 1 is characterized in that: Step 3 is as follows: Step 3.1: Modify the high-pressure valve program segment of the sea-side hoisting device to make it long-open; Step 3.2: Ensure that the system runs stably after the program is modified; Step 3.3: Perform system testing after program modification.

4. The method for connecting the hydraulic system of the double-lifting quay crane hoist according to claim 1 is characterized in that: In step 4, the operation of disconnecting the spreader pump contactor includes: Step 4.1: Disconnect the landside spreader upper pump contactor; Step 4.2: Disconnect the sea side spreader upper pump contactor; Step 4.3: Ensure safe operation of the system after disconnection operation.

5. The method for connecting the hydraulic system of the double-lifting quay crane hoist according to claim 1 is characterized in that: The lifting device comprises a main beam (3), telescopic beams (1) are installed at both ends of the main beam (3), a guide plate (4) is fixed on the top of the telescopic beam (1), an intermediate lifting point (2) is arranged at the bottom of the main beam (3), and a hydraulic assembly (5) is installed on the top of the main beam (3).

6. The method for connecting the hydraulic system of the double-lifting quay crane hoist according to claim 5 is characterized in that: The hydraulic assembly (5) comprises a hydraulic oil tank, a rack oil tank and a motor, and the hydraulic oil tank is connected to the hydraulic power station of the sea side rack and the land side rack through pipelines.

7. The method for connecting the hydraulic system of the double-lifting quay crane hoist according to claim 5 is characterized in that: The telescopic beam (1) is in a U shape, and one open end is plugged into the main beam (3).

8. The method for connecting the hydraulic system of the double-lifting quay crane hoist according to claim 7 is characterized in that: There are four guide plates (4), which are respectively fixed to ends of the two telescopic beams (1) that are away from each other, and the four guide plates (4) are symmetrically arranged.

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