CN208685686U - Reduce drag head dredging system, the trailing suction hopper dredger of excavating resistance using rolling friction - Google Patents
Reduce drag head dredging system, the trailing suction hopper dredger of excavating resistance using rolling friction Download PDFInfo
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- CN208685686U CN208685686U CN201821201361.2U CN201821201361U CN208685686U CN 208685686 U CN208685686 U CN 208685686U CN 201821201361 U CN201821201361 U CN 201821201361U CN 208685686 U CN208685686 U CN 208685686U
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Abstract
The utility model provides a kind of drag head dredging system, trailing suction hopper dredger for reducing excavating resistance using rolling friction, belongs to Dredging Technology field.Drag head dredging system includes drag head fixed body, the drag head movable guard equipped with rake teeth, drag reduction rolling element, high pressure cleaning system.Drag head movable guard is assembled together with drag head fixed body, and the bottom of drag head fixed body is equipped with drag reduction rolling element.High pressure cleaning system include be arranged in the surface of anti-attrition roller several along the connection groove of axis directions, every groove the several high pressure nozzles being arranged and the pressure pipeline being connect with high pressure nozzle.The utility model has the beneficial effects that: providing drag reduction rolling element in drag head structure, reduce excavating resistance, and improve digging efficiency under existing trailing suction hopper dredger installed power；Meanwhile on the one hand loosening soil layer is washed away by high pressure water flow before rake teeth cuts soil layer using high pressure cleaning system, reduce cutting resistance, on the other hand washes away the soil being attached on anti-attrition roller.
Description
Technical field
The utility model belongs to Dredging Technology field, is related to a kind of dredging work, ocean engineering construction operation process
Middle drag head dredging system, the trailing suction hopper dredger for reducing excavating resistance using rolling friction.
Background technique
As the quickening of ocean development is with deeply, dredging work and ocean engineering every field are fast-developing, in dredger
Cheng Zhong, trailing suction hopper dredger are one of common important engineering ships, and it is at bottom soil that ship rake used, which inhales digging/sludge discharge way,
The typical way set.With the manufacturing technology promotion of dredger and industry requirement, trailing suction hopper dredger develops towards enlargement, volume of compartment
It is constantly promoted with installed power, and the dredging capacity of dredger depends primarily on total installed capacity power.Therefore, it is determined in installed power
In the case where, reduce unnecessary power consumption, dredging efficiency is most important to improving.
Drag head is the important component that trailing suction hopper dredger excavates soil layer construction operation, and effect is to excavate the objects such as underwater silt
Matter, and be allowed to be mixed into mud with the water for entering drag head, predetermined position is transported to by harrowing pipe by the way of slurry pipeline steel afterwards.
Drag head bears the important of most mining resistance and installed power consumption as the operation part during digging operation
Component part.How by designing novel drag head, reduces excavating resistance and reach reduction installed power consumption, improve dredging efficiency just
It is particularly important.
Summary of the invention
It is excavated the purpose of this utility model is that overcoming the deficiencies of the prior art and provide a kind of reduce using rolling friction
Drag head dredging system, the trailing suction hopper dredger of resistance, to solve existing trailing suction hopper dredger drag head resistance consumption, underpower is asked
Topic improves the digging efficiency of trailing suction hopper dredger in the case where not changing ship installed power.
In order to achieve the above objectives, the utility model provides following technical solution:
A kind of drag head dredging system reducing excavating resistance using rolling friction, including drag head fixed body, equipped with rake teeth
Drag head movable guard, drag reduction rolling element, high pressure clear up system.
Wherein, drag head movable guard is assembled together with drag head fixed body by drag head connecting shaft, the bottom of drag head fixed body
Drag reduction rolling element is installed；Drag reduction rolling element includes anti-attrition roller, sliding bearing, connecting shaft and connection shaft seat；Connection shaft seat installation
On drag head fixed body, connecting shaft is installed on connection shaft seat by sliding bearing, and anti-attrition roller is rotationally connected in connecting shaft.
Further, high pressure cleaning system include be arranged in the surface of anti-attrition roller several along connection axis directions groove,
The several high pressure nozzles being arranged in every groove and the pressure pipeline connecting with high pressure nozzle, pressure pipeline is in connecting shaft
Along connection axis direction arrangement, it is connected on the rotating type high-pressure connector for being mounted on and connecting outside connection shaft seat and with connecting shaft.It is preferred that
The diameter of high pressure nozzle is 5mm.
Further, ground is completely attached to as 0 ° with groove, i.e., the contact of groove face landing ground is 0 °, is rotated in groove (suitable
Clockwise) to 0 °~20 ° and 340 °~360 ° of ranges when, automatically turn on rotating type high-pressure connector and wash by water, on the one hand may be used
To wash away loosening soil layer by high pressure water flow before rake teeth cuts soil layer, reduces cutting resistance, on the other hand can wash away attachment
Soil on anti-attrition roller achievees the purpose that cleaning attachment soil.
Preferably, the radius of anti-attrition roller can be set to 0.1~0.5m, can effectively reduce excavating resistance and
It can guarantee drag head other component normal use.
The utility model also provides a kind of trailing suction hopper dredger for reducing excavating resistance using rolling friction, including rake is inhaled and dredged
Ship hull and rake arms, rake arms include drag head dredging system and rake pipe, and the one end for harrowing pipe is arranged on trailing suction hopper dredger hull, another
One end is equipped with drag head dredging system.
Drag head dredging system includes drag head fixed body, the drag head movable guard equipped with rake teeth, drag reduction rolling element, high pressure cleaning system
System.
Wherein, drag head fixed body and rake pipe form a physical connection, while drag head fixed body and drag head movable guard carry out
Assembly constitutes a submerged digging operating system.
Further, drag reduction rolling element is installed in the bottom of drag head fixed body；Drag reduction rolling element includes anti-attrition roller, sliding axle
It holds, connecting shaft and connection shaft seat；Connection shaft seat is mounted on drag head fixed body, and connecting shaft is installed to connecting shaft by sliding bearing
On seat, anti-attrition roller is rotationally connected in connecting shaft.
Further, high pressure cleaning system include be arranged in the surface of anti-attrition roller several along connection axis directions groove,
The several high pressure nozzles being arranged in every groove and the pressure pipeline connecting with high pressure nozzle, pressure pipeline is in connecting shaft
Along connection axis direction arrangement, it is connected on the rotating type high-pressure connector for being mounted on and connecting outside connection shaft seat and with connecting shaft.It is preferred that
The diameter of high pressure nozzle is 5mm.
Further, ground is completely attached to as 0 ° with groove, i.e., the contact of groove face landing ground is 0 °, is revolved clockwise in groove
When going to 0 °~20 ° and 340 °~360 ° of ranges, automatically turns on rotating type high-pressure connector and wash by water, it on the one hand can be in rake teeth
Loosening soil layer is washed away by high pressure water flow before cutting soil layer, reduces cutting resistance, on the other hand can wash away and be attached to anti-attrition rolling
Soil on cylinder achievees the purpose that cleaning attachment soil.
In a preferred embodiment, the radius of anti-attrition roller can be set to 0.1~0.5m, can effectively reduce
Excavating resistance, and can guarantee drag head other component normal use.
The drag head dredging system provided by the utility model for reducing excavating resistance using rolling friction is set using anti-attrition roller
Meter introduces rolling friction, reduces resistance suffered in drag head mining process, detailed process is as follows:
When drag head from rake pipe because trailing suction hopper dredger hull navigates by water applied drag force by pulling, drag head is being dug
The enterprising line slip of the soil layer of pick；When sliding generation, made in drag head by drag head, the Gravitative Loads of rake pipe and fulcrum bar of the spring pressure
Drag head fixed body and excavated soil layer between there are pressure effect, the anti-attrition roller installed on drag head fixed body at this time because rake
Head, the Gravitative Loads of rake pipe and fulcrum bar of the spring pressure and excavated soil layer are in impaction state；When drag head is to trailing suction hopper dredger ship
When body navigates by water direction sliding, what is occurred at drag head fixed body is no longer sliding friction, but the rolling friction that anti-attrition roller generates.
Compared with prior art, the utility model has the beneficial effects that: the utility model is directed to drag head in mining process
Middle there are the factors of frictional resistance, propose rolling friction solution, drag reduction rolling element is provided in drag head structure, is not necessarily to
Change drag head other structures and ship power system, excavating resistance can be reduced, and under existing trailing suction hopper dredger installed power
Improve digging efficiency；Meanwhile on the one hand loosening is washed away by high pressure water flow before rake teeth cuts soil layer using high pressure cleaning system
Soil layer reduces cutting resistance, on the other hand washes away the soil being attached on anti-attrition roller, achievees the purpose that cleaning attachment soil.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of trailing suction hopper dredger, rake pipe, drag head；
Fig. 2 is the structural schematic diagram of existing drag head；
Fig. 3 is the force analysis figure of existing drag head；
Fig. 4 is the structural schematic diagram of drag head provided by the embodiment of the utility model；
Fig. 5 is the structural schematic diagram of drag head fixed body provided by the embodiment of the utility model；
Fig. 6 is the structural schematic diagram of drag reduction rolling element provided by the embodiment of the utility model；
Fig. 7 is the force analysis figure of drag head provided by the embodiment of the utility model.
Numeral mark in figure:
Drag head 1, friction block 10, drag head fixed body 11, drag head movable guard 12, rake teeth 13, drag reduction rolling element 14, anti-attrition roller
141, sliding bearing 142, connecting shaft 143, connection shaft seat 144, high pressure cleaning system 15, groove 151, high pressure nozzle 152, rake pipe
2, trailing suction hopper dredger hull 3.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, in general, trailing suction hopper dredger hull 3 is in waters when digging operation, it is necessary first to transfer rake arms, harrow
Arm includes rake pipe 2 and drag head 1.
As shown in Fig. 2, existing drag head 1 generally includes drag head fixed body 11 and the drag head movable guard 12 equipped with rake teeth 13,
Wherein drag head fixed body 11 is connected to rake 2 end of pipe, and drag head fixed body 11 connect composition digging system with drag head movable guard 12, uses
Underwater soil is in excavate.Further, the lower section of drag head fixed body 11 is equipped with friction block 10 to reduce drag head fixed body
11 contact wear during digging operation, but the frictional resistance of drag head 1 is also increased simultaneously, installed power is consumed, is dropped
Low digging efficiency.
As shown in figure 3, on vertical, drag head be self-possessed and the effect of fulcrum bar of the spring pressure under form vertical normal pressure W, and by
To soil layer reaction of bearing T, the rake teeth on drag head is in vertical normal pressure W effect incision underground layer；In the horizontal direction, rake pipe drags
Generation level point is dragged to pulling force F, drag head is simultaneously by resistance to water-flow Fw, drag head frictional resistance FfWith other resistances of drag head Fs1-s3,
Wherein other resistances of drag head include hilling resistance, absorption resistance and cutting resistance three parts.Drag head when existing drag head operation rubs
Wipe resistance Ff=μ T=μ W is that friction block contacts the sliding friction generated with soil layer, and the mechanism for generating sliding friction is due to drag head
The surface contacted with soil layer be not it is smooth, the cohesion effect of engagement and molecule between drag head and soil layer be generate cunning
Two Main physical reasons of kinetic force of friction.Thus, it is desirable to reduce excavating resistance by designing novel drag head and reach reduction installation
The purpose of power consumption, to improve dredging efficiency.
As a result, according to the working principle of drag head, drag head will be under drag head movable guard under self weight and the effect of fulcrum bar of the spring pressure
Rake teeth be pressed into soil layer, be embedded in the rake teeth of soil layer and pulled by rake pipe by the soil cutting of consolidation, removing in dredger navigation,
Reach mechanical and excavates purpose.In the process, the cutting resistance between drag head and soil layer is able to achieve cutting and excavates purpose, is beneficial
Resistance；But there is also these useless resistances of resistance to water-flow, absorption resistance, hilling resistance and frictional resistance, consume a large amount of installation function
Rate.It is limited to be limited by ship installed power, needs to redesign drag head dredging system for resistance in mining process, is not changing ship
In the case where oceangoing ship installed power, digging efficiency is improved.
There is effect from excavated soil layer and frictional resistance and hilling in above-mentioned mining process for drag head
Resistance there are the reason of, the utility model provides following technical solution:
As shown in Figures 4 to 7, the utility model provides a kind of drag head for reducing excavating resistance using rolling friction and dredges and be
System clears up system 15 including drag head fixed body 11, the drag head movable guard 12 equipped with rake teeth 13, drag reduction rolling element 14, high pressure.
Wherein, drag head fixed body 11 and drag head movable guard 12 are assembled together, and be mounted on rake pipe 2 end, by because
Produced by rake suction ship hull 3 navigates by water, the effect of the drag force transmitted by rake pipe 2 carries out digging operation.Drag head fixed body 11 is herein
Play the role of structure connection, be the rack that drag head movable guard 12 is installed, drag head fixed body 11 is connect with rake pipe 2 simultaneously.
Further, drag reduction rolling element 14 is installed in the bottom of drag head fixed body 11；Drag reduction rolling element 14 includes anti-attrition roller
141, sliding bearing 142, connecting shaft 143 and connection shaft seat 144；Connection shaft seat 144 is mounted on drag head fixed body 11, connecting shaft
143 are installed on connection shaft seat 144 by sliding bearing 142, and anti-attrition roller 141 is rotationally connected in connecting shaft 143.
Wherein, anti-attrition roller 141 is the structural member that excavating resistance is reduced in drag head dredging system, and anti-attrition roller 141 is installed
On drag head fixed body 11.Connection shaft seat 114 is the structure installed on drag head fixed body 11, for installing anti-attrition roller 141.Even
Spindle 143 is the installation axle of anti-attrition roller 141, and anti-attrition roller 141 is rotated around connecting shaft 143.Sliding bearing 142 is for connecting
Spindle 143 and connection shaft seat 144 in succession.
Further, high pressure cleaning system 15 includes that several edge connection axis directions on the surface of anti-attrition roller 141 are arranged in
The several diameters being arranged in groove 151, every groove 151 are the high pressure nozzle 152 of 5mm and connect with high pressure nozzle 152
Pressure pipeline, pressure pipeline are arranged in connecting shaft 143 along 143 direction of connecting shaft, are connected to and are mounted on outside connection shaft seat 144 simultaneously
The rotating type high-pressure connector to connect with connecting shaft 143.
Further, ground is completely attached to as 0 ° with groove 151, i.e., the contact of 151 face landing ground of groove is 0 °, in groove
When 151 rotation (clockwise direction) to 0 °~20 ° and 340 °~360 ° of ranges, automatically turns on rotating type high-pressure connector and rushed
On the one hand water can wash away loosening soil layer by high pressure water flow before rake teeth 13 cuts soil layer, reduce cutting resistance, on the other hand
The soil being attached on anti-attrition roller 141 can be washed away, achievees the purpose that cleaning attachment soil.
In a preferred embodiment, the radius of anti-attrition roller 141 can be set to 0.1~0.5m, can be effective
Reduce excavating resistance, and can guarantee drag head other component normal use.
The utility model reduces drag head resistance suffered in mining process by being introduced into rolling friction as a result, reduces
Drag head is formed by frictional resistance to soil layer normal pressure because of drag head in mining process, while reducing hilling resistance, that is, subtract
Active force from institute's mining clay suffered by small drag head, to reduce excavating resistance.
In the utility model, it is provided with drag reduction rolling element in drag head fixed body lower part, to be substantially reduced frictional resistance, is reduced
Installed power consumption.
In the utility model, drag head other component is remained unchanged, thus drag head be subject to resistance to water-flow, absorption resistance, cut
Resistance is cut to remain unchanged, and rolling frictional resistance and hilling resistance that the anti-attrition roller of drag reduction rolling element generates change.Rolling
The mechanism of dynamic friction is mainly effect of the anti-attrition roller by the rolling resistance moment of couple, and radius is on the centre of the drum O ' of R by load
(including self weight) W, the soil layer at this moment pressed against by anti-attrition roller can be dented.When acting on a horizontal force F on O ', anti-attrition roller has
The trend rolled clockwise, so that anti-attrition roller is offset to the right O point by the soil layer reaction of bearing T at the center of direction,
It is i.e. instantaneous, to prevent anti-attrition rollers roll.Increasing F makes anti-attrition roller be in the critical state that just start to roll and not roll,
At this moment T, which is deviated to the right, reaches maximum value e, and static friction force also reaches a maximum value, but still far smaller than maximum quiet rubs
Wipe power Ff=μ T=μ W.It can be obtained by equilibrium condition:
Tsin α=Th=F (1)
Tcos α=Tv=W (2)
Tsin α R=eW (3)
Wherein, T indicates that soil layer reaction of bearing, F indicate that rake pipe pulls generation level and Xiang Lali, α is divided to indicate the soil layer of offset
Reaction of bearing T and vertical angle, ThIndicate soil layer reaction of bearing T component in the horizontal direction, TvIndicate that soil layer reaction of bearing T exists
The component of vertical direction, W indicate that drag head is being self-possessed and is forming vertical normal pressure under the effect of fulcrum bar of the spring pressure, and e indicates soil layer branch
The horizontal distance that counter-force T position O deviates centre of the drum O ' is supportted, R indicates the radius of anti-attrition roller.
Here eW is to roll resistance moment of couple MT, it is the moment of couple for preventing anti-attrition rollers roll, e has the meaning of the arm of couple
Justice.The size of e is related with the physical property of anti-attrition roller and plane, also has with the size of soil layer reaction of bearing T and radius roller R
It closes, is often referred to as " coefficient of rolling friction ".Rolling resistance moment of couple MTBe not it is directly proportional to T, e is also not a constant, but e
Value it is more much smaller than radius roller R, can be derived from by above-mentioned three formula:
Th=F=Tsin α=W (e/R) (4)
The formula is similar with the formula of force of sliding friction is calculated, and steel is contacted with soil, friction coefficient mu is about
0.3~0.5, e/R are usually about 1/200~1/80, therefore rolling friction only has the 1/ of sliding-frictional resistance under normal circumstances
60~1/40, while rolling but also hilling substantially reduces, reduce hilling resistance.Therefore, the anti-attrition that the utility model uses
Roller does not change pressure, soil layer support force, resistance to water-flow, absorption resistance and the cutting resistance that drag head is subject to, but rubs resistance
Power is reduced to the 1/60~1/40 of existing drag head, and hilling resistance is also substantially reduced.
Further, in order to guarantee that the rotation of anti-attrition roller uses, drag head fixed body lower part is installed and is connected by the utility model
Axle bed, and connecting shaft is installed on connection shaft seat by sliding bearing, anti-attrition roller is rotationally connected in connecting shaft, with reality
It now introduces rolling friction and reduces the purpose for acting on resistance between drag head and soil layer.
Since anti-attrition roller provided by the utility model can be adhered loose soil in digging operation rolling process, and it is attached
Soil constantly thicken in the accumulation of anti-attrition cylinder surface and will affect subsequent job efficiency, for this purpose, drag head provided by the utility model
Dredging system further comprises high pressure cleaning system.
High pressure cleaning system includes groove, the every groove that several edge connection axis directions on the surface of anti-attrition roller are arranged in
Several diameters of interior setting are the high pressure nozzle of 5mm and the pressure pipeline that connect with high pressure nozzle, and pressure pipeline is in connecting shaft
It is interior to be arranged along connection axis direction, it is connected to and is mounted on the outer rotating type high-pressure connector to connect with connecting shaft of connection shaft seat.
Ground is completely attached to as 0 ° with groove, i.e., the contact of groove face landing ground is 0 °, in groove rotation (side clockwise
To) to high-pressure flush is automatically turned within the scope of 0 °~20 ° and 340 °~360 °, on the one hand it can pass through before rake teeth cuts soil layer
High pressure water flow washes away loosening soil layer, reduces cutting resistance, on the other hand can wash away the soil being attached on anti-attrition roller, reach
The purpose of cleaning attachment soil.
To sum up, the utility model is based on force analysis and illustrates rolling friction mechanism of production, and shows to roll by experimental analysis
Dynamic friction significantly reduces drag head excavating resistance suffered in actual excavation cargo handling operation, and the design for specifying anti-attrition roller changes
It makes so that frictional resistance is reduced to the 1/60~1/40 of existing drag head, while reducing hilling resistance, reaches and reduce excavating resistance
Purpose, normal use and stressing influence very little to drag head other component；Test and the radius for analyzing determining anti-attrition roller
For 0.1~0.5m, excavating resistance and drag head other component normal use can be effectively reduced；In anti-attrition cylinder surface
Several are reserved along the groove of connection axis direction, built-in diameter is the high pressure nozzle of 5mm, is turned within the scope of effective angle in groove
High-pressure flush is automatically turned on, achievees the purpose that cleaning attachment soil.
The utility model also provides a kind of trailing suction hopper dredger for reducing excavating resistance using rolling friction, including rake is inhaled and dredged
Ship hull 3 and rake arms, rake arms include drag head dredging system and rake pipe 2, and one end of rake pipe 2 is arranged on trailing suction hopper dredger hull 3,
Its other end is equipped with drag head dredging system.
Drag head dredging system includes drag head fixed body 11, the drag head movable guard 12 equipped with rake teeth 13, drag reduction rolling element 14, height
Press cleaning system 15.
Wherein, drag head fixed body 11 and rake pipe 2 form a physical connection, while drag head fixed body 11 and drag head movable guard
12, which carry out assembly, constitutes a submerged digging operating system.
Further, drag reduction rolling element 14 is installed in the bottom of drag head fixed body 11；Drag reduction rolling element 14 includes anti-attrition roller
141, sliding bearing 142, connecting shaft 143 and connection shaft seat 144；Connection shaft seat 144 is mounted on drag head fixed body 11, connecting shaft
143 are installed on connection shaft seat 144 by sliding bearing 142, and anti-attrition roller 141 is rotationally connected in connecting shaft 143.
Further, high pressure cleaning system 15 includes that several edge connection axis directions on the surface of anti-attrition roller 141 are arranged in
The several diameters being arranged in groove 151, every groove 151 are the high pressure nozzle 152 of 5mm and connect with high pressure nozzle 152
Pressure pipeline, pressure pipeline are arranged in connecting shaft 143 along 143 direction of connecting shaft, are connected to and are mounted on outside connection shaft seat 144 simultaneously
The rotating type high-pressure connector to connect with connecting shaft 143.
Further, ground is completely attached to as 0 ° with groove 151, i.e., the contact of 151 face landing ground of groove is 0 °, in groove
When 151 rotation (clockwise direction) to 0 °~20 ° and 340 °~360 ° of ranges, automatically turns on rotating type high-pressure connector and rushed
On the one hand water can wash away loosening soil layer by high pressure water flow before rake teeth 13 cuts soil layer, reduce cutting resistance, on the other hand
The soil being attached on anti-attrition roller 141 can be washed away, achievees the purpose that cleaning attachment soil.
In a preferred embodiment, the radius of anti-attrition roller 141 can be set to 0.1~0.5m, can be effective
Reduce excavating resistance, and can guarantee drag head other component normal use.
Trailing suction hopper dredger provided by the utility model is suitable for soil property loose and lower than clay hardness, can excavate sand and warp
Crushed rocks, medium closely knit sand, the plastic low hard plastic clay etc. that partial size is little after handling are crossed, drag head provided by the utility model is dug
Mud system on trailing suction hopper dredger the soil property range of suitable operation do not influence, drag reduction rolling element is even if on loose soil layer
It is able to achieve rolling operation.
The drag head dredging system provided by the utility model for reducing excavating resistance using rolling friction is set using anti-attrition roller
Meter introduces rolling friction, reduces resistance suffered in drag head mining process, detailed process is as follows:
When drag head from rake pipe 2 because trailing suction hopper dredger hull 3 navigates by water applied drag force by pulling, drag head is in institute
The enterprising line slip of the soil layer of excavation；When sliding generation, make the drag head fixed body in drag head by the Gravitative Loads of drag head, rake pipe
There are pressure effect between 11 and excavated soil layer, the anti-attrition roller 141 installed on drag head fixed body 11 at this time is because of drag head, rake pipe
Gravitative Loads and excavated soil layer be in impaction state；When drag head, which navigates by water direction to trailing suction hopper dredger hull 3, to be slided, drag head
What is occurred at fixed body 11 is no longer sliding friction, but the rolling friction that anti-attrition roller 141 generates.
Foregoing description is only the description to the utility model preferred embodiment, is not to any of the scope of the utility model
It limits.Any change or modify equal that any those skilled in the art makes according to the technology contents of the disclosure above
It should be considered as equivalent effective embodiment, belong to the range of technical solutions of the utility model protection.
Claims (4)
1. a kind of drag head dredging system for reducing excavating resistance using rolling friction, it is characterised in that: including drag head fixed body
(11), the drag head movable guard (12) equipped with rake teeth (13), drag reduction rolling element (14), high pressure cleaning system (15)；
The drag head movable guard (12) is assembled together with drag head fixed body (11), the bottom installation of the drag head fixed body (11)
Drag reduction rolling element (14)；
The drag reduction rolling element (14) includes anti-attrition roller (141), sliding bearing (142), connecting shaft (143) and connection shaft seat
(144)；The connection shaft seat (144) is mounted on drag head fixed body (11), and the connecting shaft (143) passes through sliding bearing
(142) it is installed on connection shaft seat (144), the anti-attrition roller (141) is rotationally connected on connecting shaft (143)；
High pressure cleaning system (15) include setting anti-attrition roller (141) surface several along connecting shaft (143) direction
The several high pressure nozzles (152) being arranged and the pressure being connect with high pressure nozzle (152) in groove (151), every groove (151)
Hydraulic piping；The pressure pipeline is arranged in connecting shaft (143) along connecting shaft (143) direction, is connected to and is mounted on connection shaft seat
(144) the rotating type high-pressure connector to connect outside and with connecting shaft (143).
2. the drag head dredging system according to claim 1 for reducing excavating resistance using rolling friction, it is characterised in that: institute
The diameter for stating high pressure nozzle (152) is 5mm.
3. the drag head dredging system according to claim 1 for reducing excavating resistance using rolling friction, it is characterised in that: institute
The radius for stating anti-attrition roller (141) is set as 0.1~0.5m.
4. a kind of trailing suction hopper dredger for reducing excavating resistance using rolling friction, it is characterised in that: including trailing suction hopper dredger hull
(3) and rake arms, rake arms include drag head dredging system and rake pipe (2), and one end of rake pipe (2) is arranged in trailing suction hopper dredger hull (3)
On, the other end is equipped with drag head dredging system；
The drag head dredging system includes drag head fixed body (11), the drag head movable guard (12) equipped with rake teeth (13), drag reduction rolling
Body (14), high pressure cleaning system (15)；
The bottom of the drag head fixed body (11) is installed by drag reduction rolling element (14)；The drag reduction rolling element (14) includes anti-attrition roller
(141), sliding bearing (142), connecting shaft (143) and connection shaft seat (144)；It is solid that the connection shaft seat (144) is mounted on drag head
Determine on body (11), the connecting shaft (143) is installed on connection shaft seat (144) by sliding bearing (142), anti-attrition roller
(141) it is rotationally connected on connecting shaft (143)；
High pressure cleaning system (15) include setting anti-attrition roller (141) surface several along connecting shaft (143) direction
The several high pressure nozzles (152) being arranged and the pressure being connect with high pressure nozzle (152) in groove (151), every groove (151)
Hydraulic piping；The pressure pipeline is arranged in connecting shaft (143) along connecting shaft (143) direction, is connected to and is mounted on connection shaft seat
(144) the rotating type high-pressure connector to connect outside and with connecting shaft (143).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821201361.2U CN208685686U (en) | 2018-07-27 | 2018-07-27 | Reduce drag head dredging system, the trailing suction hopper dredger of excavating resistance using rolling friction |
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| CN201821201361.2U CN208685686U (en) | 2018-07-27 | 2018-07-27 | Reduce drag head dredging system, the trailing suction hopper dredger of excavating resistance using rolling friction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708414A (en) * | 2018-07-27 | 2018-10-26 | 中交疏浚技术装备国家工程研究中心有限公司 | Reduce drag head dredging system, trailing suction hopper dredger and the method for excavating resistance using rolling friction |
| CN111894058A (en) * | 2020-07-28 | 2020-11-06 | 中交广州航道局有限公司 | Rock crushing harrow head |
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2018
- 2018-07-27 CN CN201821201361.2U patent/CN208685686U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708414A (en) * | 2018-07-27 | 2018-10-26 | 中交疏浚技术装备国家工程研究中心有限公司 | Reduce drag head dredging system, trailing suction hopper dredger and the method for excavating resistance using rolling friction |
| CN111894058A (en) * | 2020-07-28 | 2020-11-06 | 中交广州航道局有限公司 | Rock crushing harrow head |
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