CN110588883B - Design method of grain-mounted sawdust boat with good safety - Google Patents
Design method of grain-mounted sawdust boat with good safety Download PDFInfo
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- CN110588883B CN110588883B CN201910812109.8A CN201910812109A CN110588883B CN 110588883 B CN110588883 B CN 110588883B CN 201910812109 A CN201910812109 A CN 201910812109A CN 110588883 B CN110588883 B CN 110588883B
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Abstract
The invention relates to the technical field of ship design, in particular to a design method of a combined grain type sawdust boat with good safety. The invention greatly improves the capability of the sawdust boat for holding grains on the premise of ensuring the safety of the boat.
Description
Technical Field
The invention relates to the technical field of ship design, in particular to a design method of a grain-mounted sawdust boat with good safety.
Background
The chip ship is a special ship specially used for loading chips, and is generally limited to loading the chips. The density of the wood chips as a light cargo is relatively low, about 0.5t/m3, so that the wood chip ship is designed to have a relatively large hold capacity in order to realize full loading of the wood chips.
In the prior art, the chip ship is not well compatible with the loading of other cargos because the chip ship is designed according to the loading of chips. For example, in order to improve the utilization of a chip ship, a chip ship may be used for loading grains. However, since the grains as a fluid cargo can swing along with the ship laterally during the sailing process, the grains can shift laterally in the cargo hold, and after the grains shift in the cargo hold, a large lateral moment can be generated, and if the moment exceeds a certain value, the roll angle of the ship can be further increased, and even the ship can overturn. Furthermore, for the sawdust boat, since the density of the grains is much greater than that of the sawdust, generally above 0.7t/m3, if the sawdust boat is used for loading grains, the cargo hold cannot reach full load, so that the transverse tilting moment of the grains is too large, the boat can overturn, and if only part of the cargo hold is loaded with grains, the total longitudinal strength cannot meet the full load requirement.
Therefore, in view of the above problems, there is a need for a new chip boat design method to better achieve compatible loading of chips and grains.
Disclosure of Invention
In order to solve the problems, the invention provides a design method of a grain-compatible sawdust boat with good safety, aiming at improving the grain-compatible capacity of the sawdust boat on the premise of ensuring the safety. The specific technical scheme is as follows:
a design method of a grain-compatible sawdust boat with good safety sequentially comprises the following steps:
(1) cabin body design: designing a ship body, and designing K cabin bodies which are mutually separated on the ship body; during design, according to the rated total wood chip loading capacity, the total value of the full-load wood chip loading capacity of the K cabin bodies is equal to the rated total wood chip loading capacity;
(2) strength design: designing the strength of all K cabins to meet the strength requirement of a single cabin and the total strength requirement of a ship body when wood chips are fully loaded;
(3) cabin body classification design: m of the K cabin bodies are selected as special cabin bodies for loading sawdust, and G of the K cabin bodies are selected as dual-purpose cabin bodies for holding sawdust or grains; wherein K ═ M + G;
(4) calculating safe heeling moment: calculating whether the transverse tilt moment of the goods exceeds the allowable safe transverse tilt moment under the condition that the M cabin bodies are fully loaded with sawdust and the G cabin bodies are fully loaded with grains;
(5) the two types of cabin bodies are matched in quantity: if the goods heeling moment exceeds the allowable safe heeling moment, the goods heeling moment does not exceed the allowable safe heeling moment by gradually reducing the number of the dual-purpose cabin bodies and correspondingly increasing the number of the special wood chip cabin bodies, so that the maximum value of G meeting the allowable safe heeling moment condition is obtained; if the goods heeling moment is smaller than the allowable safe heeling moment, the goods heeling moment is close to but not more than the allowable safe heeling moment by gradually increasing the number of the dual-purpose cabin bodies and correspondingly reducing the number of the special cabin bodies for the sawdust, so that the maximum value of G meeting the allowable safe heeling moment condition is obtained;
(6) hull reinforcing design: the strength of the G dual-purpose cabins is designed to be enhanced, so that the strength requirement of a single cabin and the total strength requirement of a ship body when grains in the dual-purpose cabins are fully loaded and sawdust in the special cabins is fully loaded are met.
And (4) in the process of matching the quantity of the two types of cabins in the step (5), the transverse moment of the cargo needs to be recalculated according to different matching conditions.
According to the technical scheme, on the basis of the traditional sawdust boat design method, the design of the capability of the sawdust boat for holding grains is realized through the combination of the three methods of cabin body classification design, safe heeling moment calculation and two types of cabin body quantity matching, and the capability of the sawdust boat for holding grains can be greatly improved on the premise of ensuring safety.
As one of the preferable schemes for matching the number of the two types of the cabins, six cabins which are sequentially adjacent are designed on the ship body, the six cabins are sequentially a cabin body from the first cabin body to the sixth cabin body, the cabin bodies from the third cabin body to the fifth cabin body are sawdust and grain dual-purpose cabins, and the rest cabin bodies are sawdust special cabins.
As a second preferred scheme for matching the number of the two types of cabins, six cabins which are sequentially adjacent are designed on the ship body, the six cabins are sequentially a first cabin to a sixth cabin, the second cabin and the fourth cabin are sawdust and grain dual-purpose cabins, and the rest cabins are sawdust special cabins.
As a further improvement, in the design method of the grain-equipped sawdust boat with good safety, a grain loading safety expansion device is arranged in the special cabin body for sawdust, and comprises a rolling shaft, a rolling curtain with one end connected to the rolling shaft, a rolling curtain beam arranged at the other end of the rolling curtain, and a rolling curtain opening and closing device which is connected with the rolling shaft and the rolling curtain beam and drives the rolling shaft and the rolling curtain beam to roll or open.
The grain loading safety expansion device is arranged in the special cabin body for the sawdust, so that a rated amount of grains can be loaded, and the special cabin body for the sawdust is expanded into a sawdust and grain dual-purpose cabin body. Open roll up curtain opening and shutting ware after cereal loads for roll up the curtain and open and press close to the upper portion surface of cereal, even boats and ships produce transversely to rock at the operation in-process, also can not make cereal take place holistic skew, thereby further improved the ability and the security of saw-dust ship double-purpose dress cereal.
Preferably, the roll of curtain for adopting the roll curtain that elasticity concertina cloth made, roll up the curtain ware that opens and shuts and roll up the ware for elasticity tensioning formula roll up the curtain, elasticity tensioning formula is rolled up the curtain and is opened and shut the ware including being used for driving roll curtain axle pivoted sprocket and connection the driving chain of sprocket, it connects to roll up the curtain roof beam the driving chain is last to be right to realize that the elasticity of rolling up the curtain contracts rolling and the elasticity is taut opens.
Preferably, the outer diameter of the roller shutter in the rolling state is equal to the pitch circle diameter of the chain wheel.
The chain wheels comprise a pair of front chain wheels and a pair of rear chain wheels, the number of the transmission chains is one, the roller shutter shaft is arranged at one end in the sawdust special cabin, the front chain wheels are respectively arranged at two ends of the roller shutter shaft, the rear chain wheels are rotatably arranged at the other end in the sawdust special cabin, the transmission chains are correspondingly connected between the front chain wheels and the rear chain wheels, the front chain wheels and the rear chain wheels are arranged at the same height, and the chain wheels are driven to rotate by the motor.
When the starting motor opens the roller shutter, under the drive of the transmission chain, the roller shutter beam advances at a constant speed towards the direction far away from the roller shutter shaft, and the roller shutter shaft is driven by the transmission chain and the pair of front chain wheels to unwind, the outer diameter of the roller shutter is gradually reduced in the unwinding process, so that the unwinding speed is reduced, the moving speed of the roller shutter beam is larger than the unwinding speed, thereby the tensioning effect of the roller shutter beam on the roller shutter is formed, the roller shutter is elastically opened, namely, the elastic retraction, winding and elastic tensioning of the roller shutter are realized, the roller shutter can be ensured to be always kept in an elastic tensioning state after being opened, the deviation of grains can be effectively blocked, and the safety and the reliability of grain loading are further improved.
Preferably, a grain loading limit line is arranged in the cabin body special for the sawdust, and the roller shutter is unfolded to be in a horizontal state and is located on the limit line.
Preferably, the height of the limiting line in the special cabin body for the sawdust is not more than 0.7 time of the height of the sawdust which is allowed to be fully loaded in the special cabin body for the sawdust.
Preferably, the motor is a reduction motor.
More preferably, the speed reducing motor is a worm gear speed reducing motor.
As a further improvement of the invention, four corners of the cabin body are provided with upright columns, the roller shutter shaft and the pair of rear chain wheels are respectively arranged in the protective covers, the protective covers are movably arranged on the upright columns, and the synchronous lifting of the protective covers at two ends is realized through a lifting mechanism connected to the cabin body.
The four corners of the cabin body are provided with the upright posts and the lifting mechanisms, so that the height of the roller shutter can be adjusted, and the applicability and the safety of loading grains with different specific gravities are further improved.
Preferably, the lifting mechanism is an electric push rod.
The invention has the beneficial effects that:
firstly, according to the design method of the grain-holding type sawdust boat with good safety, based on the traditional sawdust boat design method, the design of the grain-holding capacity of the sawdust boat is realized through the combination of three methods of cabin classification design, safe heeling moment calculation and matching of the quantity of two types of cabins, and the grain-holding capacity of the sawdust boat can be greatly improved on the premise of ensuring safety.
Secondly, according to the design method of the grain-mounted type sawdust boat with good safety, the grain-mounted safety expansion device is arranged in the special sawdust cabin body, so that the rated amount of grains can be allowed to be loaded, and the special sawdust cabin body is expanded into a sawdust and grain dual-purpose cabin body. Open roll up curtain opening and shutting ware after cereal loads for roll up the curtain and open and press close to the upper portion surface of cereal, even boats and ships produce transversely to rock at the operation in-process, also can not make cereal take place holistic skew, thereby further improved the ability and the security of saw-dust ship double-purpose dress cereal.
Thirdly, the design method of the grain-type sawdust boat with good safety realizes the elastic retraction, rolling and elastic tensioning of the roller shutter, and has the advantages of ensuring that the roller shutter is always kept in an elastic tensioning state after being opened, thereby effectively blocking the deviation of grains, and further improving the safety and reliability of grain loading.
Fourthly, according to the design method of the grain-type sawdust-carrying boat with good safety, the height of the roller shutter can be adjusted by arranging the upright posts and the lifting mechanisms at the four corners of the cabin body, so that the applicability and safety of loading grains with different specific gravities are further improved.
Drawings
FIG. 1 is a schematic view showing a method for designing a combined grain-type chip ship according to the present invention, which has excellent safety;
FIG. 2 is a schematic illustration of a hull classification scheme on a ship;
FIG. 3 is a schematic view of the grain loading safety extension of the enclosure of FIG. 2;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
fig. 5 is a schematic structural diagram of a further improvement on fig. 4 (the lifting function of the grain loading safety expanding device is added).
In the figure: 1. the ship comprises a ship body, 2, a cabin body, 3, a special cabin body for sawdust, 4, a dual-purpose cabin body for sawdust and grains, 5, a grain loading safety expansion device, 6, a rolling shutter shaft, 7, a rolling shutter, 8, a rolling shutter beam, 9, a rolling shutter opening and closing device, 10, chain wheels, 11, a transmission chain, 12, a pair of front chain wheels, 13, a pair of rear chain wheels, 14, a motor, 15, a shield, 16, an upright post, 17 and a lifting mechanism.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 to 5 show an embodiment of a method for designing a grain-compatible chip ship having excellent safety according to the present invention, which comprises the following steps in order:
(1) cabin body design: designing a ship body, and designing K cabin bodies which are mutually separated on the ship body; during design, according to the rated total wood chip loading capacity, the total value of the full-load wood chip loading capacity of the K cabin bodies is equal to the rated total wood chip loading capacity;
(2) strength design: designing the strength of all K cabins to meet the strength requirement of a single cabin and the total strength requirement of a ship body when wood chips are fully loaded;
(3) cabin body classification design: m of the K cabin bodies are selected as special cabin bodies for loading sawdust, and G of the K cabin bodies are selected as dual-purpose cabin bodies for holding sawdust or grains; wherein K ═ M + G;
(4) calculating safe heeling moment: calculating whether the transverse tilt moment of the goods exceeds the allowable safe transverse tilt moment under the condition that the M cabin bodies are fully loaded with sawdust and the G cabin bodies are fully loaded with grains;
(5) the two types of cabin bodies are matched in quantity: if the goods heeling moment exceeds the allowable safe heeling moment, the goods heeling moment does not exceed the allowable safe heeling moment by gradually reducing the number of the dual-purpose cabin bodies and correspondingly increasing the number of the special wood chip cabin bodies, so that the maximum value of G meeting the allowable safe heeling moment condition is obtained; if the goods heeling moment is smaller than the allowable safe heeling moment, the goods heeling moment is close to but not more than the allowable safe heeling moment by gradually increasing the number of the dual-purpose cabin bodies and correspondingly reducing the number of the special cabin bodies for the sawdust, so that the maximum value of G meeting the allowable safe heeling moment condition is obtained;
(6) hull reinforcing design: the strength of the G dual-purpose cabins is designed to be enhanced, so that the strength requirement of a single cabin and the total strength requirement of a ship body when grains in the dual-purpose cabins are fully loaded and sawdust in the special cabins is fully loaded are met.
And (4) in the process of matching the quantity of the two types of cabins in the step (5), the transverse moment of the cargo needs to be recalculated according to different matching conditions.
According to the technical scheme, on the basis of the traditional sawdust boat design method, the design of the capability of the sawdust boat for holding grains is realized through the combination of the three methods of cabin body classification design, safe heeling moment calculation and two types of cabin body quantity matching, and the capability of the sawdust boat for holding grains can be greatly improved on the premise of ensuring safety.
As one of the preferable schemes for matching the number of the two types of cabin bodies in this embodiment, six cabin bodies 2 which are adjacent in sequence are designed on the ship body 1, the six cabin bodies 2 are sequentially the first to sixth cabin bodies, the third and fifth cabin bodies are the sawdust grain dual-purpose cabin body 4, and the rest cabin bodies are the sawdust special cabin body 3.
As a second preferred scheme for matching the number of the two types of cabin bodies in this embodiment, six cabin bodies which are adjacent in sequence are designed on the ship body, the six cabin bodies are sequentially a first cabin body to a sixth cabin body, the second cabin body and the fourth cabin body are sawdust and grain dual-purpose cabin bodies, and the rest cabin bodies are sawdust special cabin bodies.
As a further improvement, the design method of the grain-type sawdust boat with good safety is characterized in that a grain loading safety extension device 5 is arranged in the cabin body 3 dedicated for sawdust, the grain loading safety extension device 5 comprises a rolling shaft 6, a rolling curtain 7 with one end connected to the rolling shaft 6, a rolling curtain beam 8 arranged at the other end of the rolling curtain 7, and a rolling curtain opening and closing device 9 which connects the rolling shaft 6 and the rolling curtain beam 8 and drives the rolling shaft 6 and the rolling curtain beam 8 to roll or open.
The grain loading safety expansion device 5 is arranged in the special cabin body 3 for sawdust, so that a rated amount of grains can be loaded, and the special cabin body 3 for sawdust is expanded into the dual-purpose cabin body 4 for sawdust and grains. Open roll up curtain opening and shutting device 9 after cereal loads for roll up curtain 7 and open and press close to the upper portion surface of cereal, even boats and ships produce horizontal rocking in the operation process, can not make cereal take place holistic skew yet, thereby further improved the ability and the security of saw-dust ship double-purpose dress cereal.
Preferably, roll up the curtain 7 for adopting the roll up the curtain that elasticity concertina cloth made, roll up the curtain ware that opens and shuts and roll up the ware for elasticity tensioning formula, elasticity tensioning formula is rolled up the curtain and is opened and shut the ware including being used for driving 6 pivoted sprockets 10 of roll curtain axle and connection the driving chain 11 of sprocket 10, roll up curtain roof beam 8 and connect in order to realize on the driving chain 11 right roll up the elasticity of rolling up curtain 7 and retract rolling and elasticity take-up open.
Preferably, the outer diameter of the roller shutter 7 is equal to the pitch circle diameter of the sprocket 10 when the roller shutter 7 is in the rolling state.
In this embodiment, the chain wheels 10 include a pair of front chain wheels 12 and a pair of rear chain wheels 13, the number of the transmission chains 11 is a pair, the rolling shaft 6 is disposed at one end of the cabin 3 dedicated to wood chips, the pair of front chain wheels 12 are respectively disposed at two ends of the rolling shaft 6, the pair of rear chain wheels 13 are rotatably disposed at the other end of the cabin 3 dedicated to wood chips, the pair of transmission chains 11 are correspondingly connected between the pair of front chain wheels 12 and the pair of rear chain wheels 13, the pair of front chain wheels 12 and the pair of rear chain wheels 13 are disposed at equal heights, and the chain wheels 10 are driven to rotate by the motor 14.
When the starting motor 14 opens the roller shutter 7, under the driving of the driving chain 11, the roller shutter beam 8 advances at a constant speed towards the direction far away from the roller shutter shaft 6, and at the same time, the roller shutter shaft 6 is also unreeled under the driving of the driving chain 11 and the pair of front chain wheels 12, the outer diameter of the roller shutter 7 is gradually reduced in the unreeling process, so that the unreeling speed is reduced, the moving speed of the roller shutter beam 8 is larger than the unreeling speed, and therefore, the roller shutter beam 8 can tension the roller shutter 7, the roller shutter 7 is elastically opened, namely, the roller shutter 7 is elastically retracted, coiled and elastically tensioned and opened, and the roller shutter 7 can be always kept in an elastically tensioned state after being opened, so that the deviation of grains can be effectively prevented, and the safety and reliability of grain loading are further improved.
Preferably, a grain loading limit line is arranged in the cabin body 3 special for the sawdust, and the roller shutter 7 is unfolded to be in a horizontal state and is positioned on the limit line.
Preferably, the height of the limit line in the cabin body 3 for the wood chips is not more than 0.7 time of the height of the wood chips allowed to be fully loaded in the cabin body 3 for the wood chips.
Preferably, the motor 14 is a reduction motor.
More preferably, the speed reducing motor is a worm gear speed reducing motor.
As a further improvement to this embodiment, the four corners of the cabin 2 are provided with upright columns 16, the rolling shutter shaft 6 and the pair of rear chain wheels 13 are respectively disposed in the protective cover 15, the protective cover 15 is movably disposed on the upright columns 16, and the synchronous lifting of the protective covers 15 at the two ends is realized through the lifting mechanism 17 connected to the cabin 2.
The height of the roller shutter 7 can be adjusted by arranging the upright posts 16 and the lifting mechanisms 17 at four corners of the cabin body 2, so that the applicability and the safety of loading grains with different specific gravities are further improved.
Preferably, the lifting mechanism 17 is an electric push rod.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A design method of a grain-compatible sawdust boat with good safety is characterized by sequentially comprising the following steps:
(1) cabin body design: designing a ship body, and designing K cabin bodies which are mutually separated on the ship body; during design, according to the rated total wood chip loading capacity, the total value of the full-load wood chip loading capacity of the K cabin bodies is equal to the rated total wood chip loading capacity;
(2) strength design: designing the strength of all K cabins to meet the strength requirement of a single cabin and the total strength requirement of a ship body when wood chips are fully loaded;
(3) cabin body classification design: m of the K cabin bodies are selected as special cabin bodies for loading sawdust, and G of the K cabin bodies are selected as dual-purpose cabin bodies for holding sawdust or grains; wherein K = M + G;
(4) calculating safe heeling moment: calculating whether the transverse tilt moment of the goods exceeds the allowable safe transverse tilt moment under the condition that the M cabin bodies are fully loaded with sawdust and the G cabin bodies are fully loaded with grains;
(5) the two types of cabin bodies are matched in quantity: if the goods heeling moment exceeds the allowable safe heeling moment, the goods heeling moment does not exceed the allowable safe heeling moment by gradually reducing the number of the dual-purpose cabin bodies and correspondingly increasing the number of the special wood chip cabin bodies, so that the maximum value of G meeting the allowable safe heeling moment condition is obtained; if the goods heeling moment is smaller than the allowable safe heeling moment, the goods heeling moment is close to but not more than the allowable safe heeling moment by gradually increasing the number of the dual-purpose cabin bodies and correspondingly reducing the number of the special cabin bodies for the sawdust, so that the maximum value of G meeting the allowable safe heeling moment condition is obtained;
(6) hull reinforcing design: the strength of the G dual-purpose cabins is designed to be enhanced, so that the strength requirement of a single cabin and the total strength requirement of a ship body when grains in the dual-purpose cabins are fully loaded and sawdust in the special cabins is fully loaded are met.
2. The design method of the grain-compatible sawdust boat with good safety as claimed in claim 1, wherein six adjacent cabins are designed on the boat body, the six cabins are sequentially a first cabin to a sixth cabin, wherein the third and fifth cabins are sawdust and grain dual-purpose cabins, and the rest cabins are sawdust special cabins.
3. The design method of the grain-compatible sawdust boat with good safety as claimed in claim 1, wherein six adjacent chambers are designed on the boat body, the six chambers are sequentially a first chamber to a sixth chamber, wherein the second and fourth chambers are sawdust/grain dual-purpose chambers, and the rest chambers are sawdust dedicated chambers.
4. The design method of the grain-compatible sawdust boat with good safety as claimed in claim 1, wherein a grain-loading safety extension device is disposed in the cabin dedicated to sawdust, and comprises a roller shutter shaft, a roller shutter with one end connected to the roller shutter shaft, a roller shutter beam disposed at the other end of the roller shutter, and a roller shutter opener connecting the roller shutter shaft and the roller shutter beam and driving the roller shutter shaft and the roller shutter beam to roll or unfold; the grain loading safety expansion device is arranged in the special cabin body for the sawdust, so that grains with quantitative amount are allowed to be loaded in the special cabin body for the sawdust, and the special cabin body for the sawdust is expanded into a dual-purpose cabin body for the sawdust and the grains.
5. The design method of the boat with cereal-type sawdust and excellent safety as claimed in claim 4, wherein said roller blinds are roller blinds made of elastic stretchable fabric, said roller blind opener is an elastic tension type roller blind opener, said elastic tension type roller blind opener comprises a sprocket for driving said roller blind shaft to rotate and a driving chain connected to said sprocket, said roller blind beam is connected to said driving chain to realize the elastic retraction rolling and elastic tensioning opening of said roller blinds.
6. The method of claim 5, wherein the outer diameter of the roll screen is equal to the pitch diameter of the sprocket when the roll screen is in the rolled state.
7. The design method of the grain-compatible sawdust boat with good safety as claimed in claim 5, wherein said chain wheels comprise a pair of front chain wheels and a pair of rear chain wheels, said transmission chains are provided in a pair, said rolling shaft is disposed at one end of said dedicated sawdust compartment, said front chain wheels are disposed at two ends of said rolling shaft, said rear chain wheels are rotatably disposed at the other end of said dedicated sawdust compartment, said pair of transmission chains are correspondingly connected between said front chain wheels and said rear chain wheels, and said front chain wheels and said rear chain wheels are disposed at equal height, and said chain wheels are rotated by said motor.
8. The design method of the grain-equipped chip boat with good safety as claimed in claim 5, wherein a grain loading limit line is arranged in the chip-dedicated cabin, and the roller shutter is unfolded to be horizontal and located on the limit line.
9. The design method of the grain-compatible chip ship with good safety as claimed in claim 8, wherein the height of the limiting line in the chip-dedicated cabin is not more than 0.7 times of the allowable full chip height in the chip-dedicated cabin.
10. The design method of the boat with cereal type chips with good safety as claimed in claim 4, wherein the four corners of the hull are provided with columns, the roller shutter shaft and the pair of rear chain wheels are respectively disposed in the protective covers, the protective covers are movably disposed on the columns, and the synchronous lifting of the protective covers at the two ends is realized by the lifting mechanism connected to the hull.
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| JPS58167286A (en) * | 1982-03-29 | 1983-10-03 | Hitachi Zosen Corp | Cattle/general cargo combined carrier vessel |
| MX2010005312A (en) * | 2007-11-15 | 2010-09-09 | Bernd Ostermeyer | Bulk material handling vehicle. |
| JP5586002B2 (en) * | 2009-09-07 | 2014-09-10 | 三井造船株式会社 | Bulk carrier and bulk barge |
| CN202226016U (en) * | 2011-08-23 | 2012-05-23 | 张家港凯航通力船用设备有限公司 | Marine hatch cover grain hole cover device |
| CN106043604B (en) * | 2016-06-23 | 2019-04-12 | 湖州双林金辉船舶制造有限公司 | A kind of collecting and distributing dual-purpose ship container loading structure |
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