CN1009016B

CN1009016B - The device that has the port ramp on landing stage

Info

Publication number: CN1009016B
Application number: CN 87104063
Authority: CN
Inventors: 赛伊德·乌勒堡; 约兰·约翰森
Original assignee: MACGREGO-NAVIRE INTERNATIONAL AB
Current assignee: MACGREGO-NAVIRE INTERNATIONAL AB
Priority date: 1987-06-03
Filing date: 1987-06-03
Publication date: 1990-08-01
Also published as: CN87104063A

Abstract

A kind of port ramp (11) with landing stage (15) is as the interface channel between roro container ship (18) and the frequent port and pier (10) that changes of water level.A slope bridge (11a) is being connected respectively on harbour edge and the landing stage around the mode of pivot vertical rotation.Buffer (19) is installed between slope bridge and the landing stage, so that slow down the angle of rotation rate of change between the two, therefore, they are combined, constitute an interconnected rigid element that crosses the car load on landing stage with respect to interruption, constitute the parts that can independently pivot of a SEA LEVEL VARIATION effect that causes with respect to morning and evening tides etc. simultaneously.

Description

The device that has the port ramp on landing stage

The present invention relates to a kind of port ramp with landing stage, it constitutes the interface channel between ferry formula ship and the frequent port and pier that changes of water level, and slope bridge wherein is connected with harbour edge and landing stage respectively in the mode that can vertically pivot.

Loading and unloading roll on roll-off container ship time in the harbour that SEA LEVEL VARIATION (for example morning and evening tides is caused) often takes place utilizes to have the port ramp on landing stage as the interface channel between ship and the harbour usually.This port ramp is known, for example is recorded among the Swedish patent application SE-A 415,583.This have structure to include bigger landing stage earlier, and its main cause is the trim that produces when heavy-duty vehicle crosses the landing stage in order to reduce as far as possible.To the modernized cargo handling of ferry formula ship, the level transhipment of meaning cargo compartment emphatically causes asymmtric load with respect to the buoyancy aid center of gravity to the landing stage.The trim that thereupon causes must reduce, so that reduce the stress on the ramp, vehicle is moved.For this reason, just need large-scale landing stage, its fabricating cost is high, takes up an area of big in harbour facilities.SE-A419,741 disclose a kind of device that reduces landing stage canting power, and this power is to be caused by the load that moves past on it.This device adopts a kind of system that has chain, counterweight and balance weight, so that balance moves past the caused moment in roll of the load on landing stage.The benefit of this device, promptly be subjected to must be by the balance weight of landing stage carrying and the limitation of weight chain for its possibility that reduces the landing stage size.And this structure is very expensive, increase the expense of maintenance.

The objective of the invention is to propose a kind of device that can reduce landing stage size and expense, this landing stage with ferry method handling goods, has extremely excellent trim characteristic for the delivery truck.

According to port ramp of the present invention, it is characterized in that having at least a hydraulic cylinder, be installed between slope bridge and the landing stage in the mode that can pivot, hydraulic cylinder two sap cavities are interconnected by at least one choke valve, and and fluid storage tank connection, so that the angle of rotation rate of change between reduction slope bridge and the landing stage; They are combined, and have constituted a rigid element that interconnects that moves past the car load on landing stage with respect to interruption, have constituted the parts that can independently pivot of the SEA LEVEL VARIATION effect that causes with respect to for example morning and evening tides in long-term.

Buffer preferably includes at least one hydraulic cylinder, and it is installed between slope bridge and the landing stage in the mode that can pivot.

According to another most preferred embodiment of the present invention, interconnect by at least one choke valve between the sap cavity of hydraulic cylinder, and be communicated with fluid storage tank.

Narrate one embodiment of the present of invention with reference to the accompanying drawings, the accompanying drawing drawing is described as follows:

Fig. 1 is the lateral view according to a port ramp of the present invention;

Fig. 2 is the schematic diagram of hydraulic circuit of the present invention;

Fig. 3 and 4 is respectively the scaled down view in two ramps under the different water levels.

In the accompanying drawings, 10 refer to harbour.11 tables are done the carried cargo loading and unloading ramp of usefulness of as a whole expression, and it is secured on the harbour and has a landing stage.Ramp 11 nationality horizontal pivot 12 are connected on the harbour edge, and pivot 12 flexibly is installed on the dock structure by snubber 13.Pivot 12 and snubber 13 are by baffle plate 14 cross-over connections.Port ramp 11 comprises a landing stage 15 and the slope bridge 11a that can vertically rotate installation around pivot, and this slope bridge is supported on harbour 10 and the landing stage 15 substantially equably, and the distance of cross-over connection between the two.This distance equals the length of slope bridge 11a, should make the gradient of slope bridge unlikely too steep during selection, even also must be so under the situation of extreme ebb tide.

Harbour 10 is preferably formed as L shaped angle and is equipped with the mooring gear that supplies landing stage 15 usefulness.

In traditional port ramp, when a loading and unloading truck 17 when ship 18 reaches landing stage 15, the landing stage just often has trim (rotating around its buoyancy aid center of gravity).This Trimming Moment causes difficulty when making ship 18 handling goods.

For avoiding trim, according to the buffer that hydraulic piston cylinder 19 forms are housed on the port ramp 11 of the present invention, the one end is installed on the bridge 11a of slope in the mode that can pivot, the other end is installed on the landing stage 15 with the same manner, piston rod 19 is connected with hydraulic system, and as shown in Figure 2, its connected mode should make between two the

sap cavity

19a and 19b of each piston rod, promptly, releasing of a certain amount of hydraulic fluid can be arranged from the side direction opposite side of piston 19c.The adjusting of liquid of releasing should make the floating height and normal SEA LEVEL VARIATION of port ramp 11, and promptly the caused SEA LEVEL VARIATION of morning and evening tides adapts.But, when a loading and unloading truck 17 crosses landing stage 15, the SEA LEVEL VARIATION that is produced is very fast, have only a small amount of hydraulic fluid to flow to another sap cavity from a sap cavity if having time, therefore, slope bridge 11a and landing stage 17 fit in a rigid element, and its rotation is positioned at pivot 12 places at harbour edge.This means that total waterline zone on landing stage will be subjected to the influence of load, therefore the result who uses can make the manufacturing on landing stage 15 have structure littler and cheap earlier than this.

Comprise choke valve 20 in the hydraulic system shown in Figure 2, also has stop valve 21 in addition, can pin or keep apart certain part of system, promptly be used to change certain element, contiguous block 22 is installed in the system, can be used for arbitrary part of for example hand pump connecting system, one way valve 23 and choke valve 20 parallel installations, resistance when avoiding liquid to flow into piston 19c suction side, each piston rod all is connected with common fluid storage tank 24, accommodates hydraulic fluid and a rubber balloon 25 that is communicated with ambient atmosphere in the fluid storage tank 24.Whole hydraulic system generally is in pressure-less state, thereby only plays the piston motion of buffering hydraulic pressure.

Fig. 3 is in two port ramps 11 under the extreme water level situation with Figure 4 shows that, wherein, landing stage 15 remains parallel to the trim of the water surface.Like this,, be convenient to transport the transition of truck between ship and landing stage, need not consider the floating horizon of ship with respect to the landing stage because the transhipment surface on landing stage 15 always is parallel to the water surface under the no-load situation.

Above describe and disclosed embodiment only is an an example of the present invention, its details can change in the scope of additional claims in many ways.For example, buffer 19 can have different project organizations, can in all sorts of ways to be connected on slope bridge and the landing stage, and choke valve 20 can be regulated with different load conditions.

Claims

1, a kind of in the harbour facilities that water level often changes as the port ramp with landing stage of the interface channel between ferry formula ship and the harbour (10), wherein, a slope bridge (11a) is being connected with harbour edge and landing stage (15) respectively around the mode of pivot vertical rotation, it is characterized in that having at least a hydraulic cylinder (19) to be installed between slope bridge (11a) and landing stage (15) in the mode that can pivot, hydraulic cylinder (19) two sap cavity (19a, 19b) can be communicated to fluid storage tank (24) at the one way valve (23) that the direction of hydraulic cylinder (19) is opened by at least one choke valve (20) and at least one, so that slow down the angle of rotation rate of change between slope bridge (11a) and landing stage (15), they are combined, constitute one in a short time and cross the interconnected rigid element of the car load on landing stage (15), the parts that can independently pivot of the SEA LEVEL VARIATION effect that one of formation causes with respect to for example morning and evening tides in long-term with respect to interruption.