CN204279892U

CN204279892U - A kind of launching chock

Info

Publication number: CN204279892U
Application number: CN201420600617.2U
Authority: CN
Inventors: 陈灏; 王亮
Original assignee: Guangzhou Shipyard International Co Ltd
Current assignee: Cssc Offshore & Marine Engineering Group Co ltd; Guangzhou Shipyard International Co Ltd
Priority date: 2014-10-17
Filing date: 2014-10-17
Publication date: 2015-04-22
Anticipated expiration: 2024-10-17

Abstract

A kind of launching chock, fixed way are provided with polylith chock, there is gap between the chock in outermost one piece of stem direction or more and hull bottom, and gap more between the chock in outside and hull is larger, and all the other chocks push against in hull bottom.In lower water process, along with the carrying out that tail is floating, stem is pressed in the pre-on empty chock of below gradually.This kind of launching method can ensure have polylith chock to support in the process of floating at ship stern, effectively reduces pressure, reduces work capacity and the difficulty of reinforcement work; Expand the applicability of infrastructure project, meet the use needs of various structures boats and ships simultaneously; Significantly reduce the use needs of first support, effectively improve its Applicable scope, reduce costs and work difficulty, increase work efficiency.

Description

A kind of launching chock

Technical field

The utility model relates to ship domain, used pre-from empty chock when particularly relating to the longitudinal gravity type boat davit dynamic launching of a kind of boats and ships.

Background technology

Longitudinal gravity type boat davit dynamic launching is a kind of launching method after ship building completes, namely boats and ships are under gravity along bow stern direction from slipping into water on the bank, this kind of launching method generally can arrange polylith chock in the bottom of boats and ships, slowly and stably water is descended gradually with auxiliary vessel, particularly in stem position, because progressing in water along with boats and ships, ship stern slowly floats, cause the weight of the overwhelming majority all to be born by stem, now then can be released the pressure by the elasticity of chock below stem.And in large ship, when bow pressure is excessive, usually also need a special first support installing in the below of bow, by increasing first fulcrum place hull, the compression area of slideway reduces stress level.

As shown in Figure 1, in launching process, first fulcrum chock 101 is topmost bow pressure undertakers, when the launching weight of boats and ships is excessive, or boats and ships center of gravity is relatively forward, very large pressure will be produced at first fulcrum chock place, need to do a large amount of reinforcement work to ensure lower water security, cause its work capacity and difficulty all very huge, even there will be the situation that cannot meet the demands.And adopt the auxiliary lower water of first support, its ship type of must fitting completely, complex manufacturing technology and accuracy requirement is high, but commonality is extremely low to cause long construction period, cost height, simultaneously because its volume and weight is all comparatively large, cause again its carrying or mounting or dismounting all very difficult.

On the other hand, the boats and ships of tail type design are all arranged in the afterbody of ship because of cabin and equipment, away from ship midship, center of gravity is by tail, the pressure produced at ship bow part is not so good as conventional ship type, water under longitudinal slipway can also be used when boarding load is not too large, but the unconventional ship type such as passenger boat, auxiliary vessel due to arrangement form different, center of gravity is relatively placed in the middle, even by first, under longitudinal slipway, water is then more difficult meets the demands.And along with the maximization of ship building, launching weight is increasing, but the ability of the Infrastructure such as building berth is just decided at the beginning of design, is difficult to change, causes it to be difficult to meet requirement of engineering.

Summary of the invention

Used pre-from empty chock when the utility model aims to provide a kind of boats and ships longitudinal gravity type boat davit dynamic launching, float bow pressure in the stage to reduce tail, and then reduce the requirement to hull structure, and reduce the requirement of strength of lower water conservancy project dress, fixed way and capital construction.

Launching chock described in the utility model, comprise fixed way, polylith is arranged along ship bow stern direction and the chock that can slide along fixed way, gap is there is between the chock in outermost one piece of stem direction or more and hull bottom, and more outside chock and hull between gap larger, all the other chocks push against in hull bottom.

Launching chock described in the utility model, the most chock of boats and ships is consistent with existing chock, but the outermost chock in stem direction then adopts the pre-method from sky, namely by calculating reserved space between chock and hull, because being that ship stern first enters water and then floats gradually when boats and ships enter water, until stem finally leaves all chocks, so the reserved pore size of the chock at this place differs, in order to coordinate, actual to enter the gap that water process is designed specifically between the chock in more outside and hull larger.Enter water conservancy project when doing, boats and ships slip in water in the lump together with beneath chock, and enter water in advance by ship stern, then ship stern floats gradually under the effect of water body buoyancy, ship stern and mid-ship leave the chock of below gradually, stem is then pressed on chock thereunder under gravity successively, until boats and ships entirety is floated.This kind of launching method increases successively because the outermost chock in stem direction interspaces in advance, can ensure in the arbitrary time in the process of floating at ship stern, all have polylith chock to support stem, effectively can reduce the pressure of bow, and then reduce work capacity and the difficulty of reinforcement work; The pressure of stem reduces, and the pressure suffered by the capital construction below it also correspondingly reduces, and can expand the applicability of infrastructure project, meets the use needs of various structures boats and ships simultaneously; Significantly reduce the use needs of first support, effectively improve its Applicable scope, reduce costs and work difficulty, increase work efficiency.

Accompanying drawing explanation

Fig. 1 is structural representation and the launching schematic diagram of water cushion wood under existing ship.

Fig. 2,3 is structural representations of launching chock described in the utility model.

Fig. 4-9 is that boats and ships utilize the process schematic playing water cushion wood to carry out lower water as shown in Figure 2.

Detailed description of the invention

A kind of launching chock, comprise fixed way 1, polylith is arranged along ship bow stern direction and the chock 2 that can slide along fixed way, gap 3 is there is between the chock in outermost one piece of stem direction or more and hull bottom, and more outside chock and hull between gap larger, all the other chocks push against in hull bottom.

As shown in Figure 2,3, the below of boats and ships 10 is provided with polylith chock, and the chock that wherein wire side is analysed and observe pushes against in hull bottom with support hull; The chock that parallax is analysed and observe is that to be positioned at stem direction outermost pre-from empty chock, be reserved with space, and the pore size of different chock increases successively between these chock and hull bottom towards stem direction.

Chock 2 surface is provided with arc groove, and the shape of arc groove is consistent with the shape of the hull bottom above it.By calculating the position determining the contact point of different chock and hull, the shape of arc groove being set according to the hull structure shape of this point, the area of contact of chock and hull bottom can be increased, reduce hull and the pressure suffered by ground further.

All chocks 2 are connected as one by the slide plate be arranged at bottom chock, and slide plate is positioned over the surface of fixed way 1 and can slides along it.All chocks are connected as one, can ensure setting between all chocks mutually position and apart from constant, effectively ensure that boats and ships descend water smoothly; Meanwhile, the chock leaving bottom of ship can not impact boats and ships or other chock; Further, overall chock is conducive to later stage recovery, reduces recovery difficult.

As shown in Figure 4, be the first stage of launching, dotted line M is waterline height, and boats and ships are in into water to entering the water initial stage, and buoyancy suffered by stern is less than stern gravity, normal chock pressurized and do not bear pressure from empty chock in advance.

As shown in Figure 5, be the subordinate phase of launching, boats and ships continue to glide, and buoyancy suffered by stern starts to be greater than stern gravity, and stern starts to float, and the no longer pressurized of the chock below stern, bow presses to the chock below it.

As shown in Figure 6, be the phase III of launching, boats and ships continue to glide, stern major part chock no longer pressurized, and bow starts to press gradually on chock thereunder.

As shown in Figure 7, be the fourth stage of launching, boats and ships continue to glide, between hull bottom baseline and chute surface, angle continues to become large, the strong point of back constantly departs from hull bottom, no longer provides support, and the strong point that front end is preset from empty chock contacts hull bottom successively and provides support.

As shown in Figure 8, be the five-stage of launching, boats and ships continue glide, stem drinking water close to light ship draught, buoyancy close to gravity size, the pressure drop of the effective strong point of bow.

As shown in Figure 9, be the 6th stage of launching, boats and ships continue to glide, and stem reaches the light ship draught degree of depth, and buoyancy equals gravity, and all strong points no longer pressurized, whole ship floats.

Become large because tail to float in process angle between hull bottom baseline and chute surface, existing launching method can only provide 1-2 the actv. strong point at stem, and two strong points stressed and uneven, the strong point foremost will bear the pressure of the overwhelming majority, and this is abnormally dangerous comparatively large or boats and ships that center of gravity is earlier for launching weight.By the pre-setting from empty chock, hull can be made to obtain multiple stressed strong point additionally, make each strong point stressed more even, significantly reduce the load of the single strong point; And the setting that preset clearance increases successively, then make effective number of support points keep within the specific limits, until whole ship floats or total pressure drop to safe range, guarantee the situation that there will not be single strong point pressure excessive in whole lower water process.

Claims

1. a launching chock, comprise fixed way (1), polylith is arranged along ship bow stern direction and the chock (2) that can slide along fixed way, it is characterized in that: between the chock in outermost one piece of stem direction or more and hull bottom, there is gap (3), and more outside chock and hull between gap larger, all the other chocks push against in hull bottom.

2. launching chock according to claim 1, is characterized in that: chock (2) surface is provided with arc groove, and the shape of arc groove is consistent with the shape of the hull bottom above it.

3. launching chock according to claim 1, is characterized in that: all chocks (2) are connected as one by the slide plate be arranged at bottom chock, and slide plate is positioned over the surface of fixed way (1) and can slides along it.