Semi-submersible type lifting platform ballast water system and operation method thereof

A lifting platform and ballast system technology, which is applied in the direction of reducing ship movement through displacement, can solve the problems of fast and efficient load adjustment of semi-submersible lifting platforms, single function of load adjustment speed, and intensified platform tilt. , to achieve the effects of easy control of load adjustment, fast load adjustment speed, and reduced platform inclination angle

Active Publication Date: 2016-05-18
CHINA NAT OFFSHORE OIL CORP +2
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the crane is slewing with load, the direction of the overturning moment generated by the huge lifting weight changes in a short period of time, and the change in the overturning moment must also be balanced by rapid load adjustment of ballast water, otherwise the tilt of the platform will be aggravated , and make the slewing mechanism run downhill, which is very dangerous
Therefore, in order to ensure the safety of the lifting operation, a large number of ballast tanks and anti-til

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Semi-submersible type lifting platform ballast water system and operation method thereof
  • Semi-submersible type lifting platform ballast water system and operation method thereof
  • Semi-submersible type lifting platform ballast water system and operation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: The ballasting / discharging operation process of the ballast tank of the lower floating body, such as image 3 shown.

[0032] When the semi-submersible lifting platform is converted under the conditions of dispatching navigation, lifting operation, and storm self-storage, it usually needs to quickly perform pressure / discharging operations to adjust the draft. When the platform needs rapid ballasting to increase the draft, the compressed air ballast system 4 is first started, and the air in the lower floating body ballast tank 1 is discharged through the pipe opening arranged at the top of the ballast tank 1 by means of the compressed air ballast system 4; then Open the inlet and outlet valves 6, and the water outside the ship enters the ballast tank 1 of the lower floating body from the inlet and outlet valves 6 by gravity; through the corresponding measurement of the ballast tank liquid level measurement unit 12 and the draft measurement unit 11, until the...

Embodiment 2

[0034] Embodiment 2: The ballasting / discharging operation process of column ballast tanks in non-emergency situations, such as Figure 4 shown.

[0035] When the semi-submersible lifting platform is converted under the working conditions of dispatching navigation, lifting operation, storm self-storage, etc., after the draught adjustment of the ballast tank 1 of the lower floating body is quickly carried out in the first embodiment, it is often It is also necessary to perform further ballasting / discharging operations on the column ballast tank of the platform to fine-tune the draft of the platform. When it is necessary to ballast the column ballast tank, first start the water pump ballast system 5; then open the seabed valve 7, and the water outside the ship is pumped into the ballast tank in the column through the water pump ballast system; through the ballast tank liquid level measurement Unit 12 measures until the required level is reached and the ballasting operation is co...

Embodiment 3

[0037] Embodiment 3: The anti-tilting load adjustment operation process of the column ballast tank under the lifting condition, such as Figure 5 shown.

[0038] During the lifting operation of the semi-submersible lifting platform, due to the rotation of the boom with heavy objects, a certain overturning moment will be generated on the platform. In order to maintain the balance of the platform, the ballast tank of the platform needs to be adjusted during the process. When the crane is carrying out the lifting operation on the port side, the water pump ballast system 5 is started, and the ballast water is pumped from the left column ballast tank 2 to the right column ballast tank 3 through the ballast pipeline, and the ballast tank liquid level measurement unit 12 is at the same time Measure until the required liquid level is reached, the load adjustment operation is completed; when the crane is performing lifting operations on the starboard side, the water pump ballast system...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a semi-submersible type lifting platform ballast water system and an operation method thereof. The system comprises lower floating bodies, uprights symmetric left and right and an upper platform, wherein the upper platform is provided with a central control system. The system is characterized in that each lower floating body is internally provided with multiple ballast tanks, one lower floating body is provided with a water pump ballast system, and each ballast tank is provided with a water inflow and outflow valve and an opening communicating with a compressed air ballast system; ballast tanks are arranged in the uprights and provided with drainage valves; the water pump ballast system is provided with a sea valve connected with water inlets of the ballast tanks of the uprights through pipelines; and the compressed air ballast system, a ballast tank liquid level measurement unit, an emergency drainage control unit and a draught measurement unit are arranged in the upper platform. The operation method includes the steps that gravity water inflow and compressed air drainage of the ballast tanks in the lower floating bodies are carried out and drainage operation of the ballast tanks in the uprights and the water pump ballast system is carried out. By the adoption of the system and the operation method, a ballast water pipe system is simplified, the ballast adjusting speed is high, and the requirements for the stability of the platform and the operation safety of a crane are met.

Description

technical field [0001] The invention relates to a ballast water system of a semi-submersible lifting platform and an operation method thereof. Background technique [0002] The semi-submersible lifting platform has become the best carrier for super-large cranes due to its strong wind and wave resistance, large deck area, large deck variable load, large loading capacity, wide range of water depths, and many personnel living quarters. Semi-submersible lifting platforms generally have various working conditions such as maneuvering, lifting operations, and storm self-storage, and their special operational functional requirements put forward higher requirements for the design of the ballast system. [0003] The ship-type semi-submersible lifting platform usually consists of two lower floating bodies, three to five pairs of left and right symmetrical columns, and an upper platform. During dispatching and sailing, in order to reduce resistance, the waterline is located at the lowe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B63B39/03
CPCB63B39/03
Inventor 钟文军康为夏杨辉毛建辉张永发周健刘瑞华冯庆斌王倩羊卫杨青邹雯缪燕华刘佳程峰
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap