Optimize Your Wharf Boarding Experience: Introduction to Professional Wharf Boarding Ladders
The conventional boarding equipment is achieved by means of the accommodation ladder of the tanker. In the development process of oil terminals, the modern scale of oil terminals, special bare terminals, the surface of the terminals is discontinuous and the elevation is too high, and the ships constantly have strong turbulence and drift during operation. Due to the large fender, the distance between the ship in the berth and the edge of the dock is too long. In this case, it is difficult to solve the contact between the ship and the dock with the gangway. In order to speed up the loading work of the tanker and ensure the safety of the personnel on and off the ship, the wharf boarding ladder has almost become the necessary equipment of the oil terminal and the loading arm at sea.
Overview
The wharf boarding ladder must have good technical performance for the environment, though its function is simple. For adapting to the fluctuation of ship to dock and the happenchance, a detailed analysis about information of hydrography, weather and ship which shall arrive at the port will be carried out during design, to confirm the suitable operation condition and choose the correct scheme and reliable preventive measure so as to attain anticipative purpose.
There are many types of wharf boarding ladder for selection. Usually adapting mechanical and hydraulic drive system for drive mechanism of boarding ladder, and equipping various protection devices as per requirement during design to ensure each drive mechanism safe operation, determine to adopt explosion proof electrical equipment for wharf boarding ladder according to the characteristic of handing oil at dock.
Next, I will introduce to you the characteristics, technical parameters and the necessary data to be mastered when choosing a wharf boarding ladder.
Characteristics:
(1) The material of ladder body is aluminum alloy, it is light and safe.
(2) Adopt four-link mechanism for steps, and steps will keep in horizontal when the ladder changes in a range of minus 45 degrees to 60 degrees.
(3) The triangle ladder and front ladder are connected with single point, so that the land wheel under triangle will still keep contacting with deck of ship steadily and be immune from influence from bump of ship and inequality.
(4) The hydraulic system is arranged suitably, weather proof and convenient to maintain.
(5) Locking performance of the lifting mechanism is firm and interlocked.
(6) The electric control system is designed independently by our company and adopts domestic and international products of famous manufacturers for main components, has reliable quality and good performance.
(7) The wireless remote made operating more convenient.
Standard:
(1) Hoister design standards
(2) Steel structure design standards
(3) Chemical and petroleum enterprise design standards—fireproof electrics
(4) Handing oil dock fireproof design standards
(5) Measurement of dry film thickness
(6) Surface rust grade and scale removal grade of steel before painting
(7) Erection quality test criterion for harbor equipment
(8) Hydraulic system general technical specification
(9) Steel and alloy chemical analysis
Main technical parameters
equipment gross power | 5.5～16kw |
equipment weight | 8～35T |
working height range | Above 20m, below 7m |
swing angle of platform | ±90°,360° |
working grade | M4 |
pitching angle of main ladder | ±50° |
pitch angle of front ladder | 0～60° |
design pressure of hydraulic cylinder | 0～16MPa |
explosion proof grade | DIIBT4 |
protection grade | IP55 |
type | B L × |
Guide for selecting wharf boarding ladder:
Selection of wharf boarding ladder shall be carried out according to dock capacity, change of tide, condition of dock surface and cost performance. Customer should fill the following parameter list and submit it to us so as to confirm the envelop range, basal dimension and load information of wharf boarding ladder.
Terminal parameters
NO. | description | data |
1 | distance between the centre of boarding ladder and the edge of dock | m |
2 | the standard elevation of dock | m |
3 | design the highest water level | m |
4 | design the lowest water level | m |
5 | nature thickness of protecting shipboard | m |
compressed thickness of protecting shipboard | m | |
6 | voltage of power supply | V |
7 | frequency of power supply | HZ |
Vessel data
NO. | description of data | data |
1 | minimum distance between vessel flange axis and deck | m |
2 | maximum distance between vessel flange axis and deck | m |
3 | the thickness of protecting shipboard | m |
4 | transverse drift(perpendicular to deck) | m |
5 | total fore and aft drift(parrel to the deck) | m |
6 | sinkage value of vessel | m |
Environment data
description of data | item | data |
maximum design wind velocity（10 meter upon the lowest water level, 3 seconds gust） | reset state | m/s |
movement/lap joint state | m/s | |
earthquake’s factors | probability coefficient of earthquake Z | G |
force acceleration of earthquake | degree | |
environment temperature | Highest | ℃ |
lowest | ℃ |
