CN206256491U - A kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt - Google Patents
A kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt Download PDFInfo
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- CN206256491U CN206256491U CN201621249378.6U CN201621249378U CN206256491U CN 206256491 U CN206256491 U CN 206256491U CN 201621249378 U CN201621249378 U CN 201621249378U CN 206256491 U CN206256491 U CN 206256491U
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Abstract
A kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt, it is made up of with the flank of tooth tooth root, the sword that breaks ground is equipped with the middle of the flank of tooth of rake teeth, this to break ground and carry out transition by curved surface between sword and the flank of tooth, the sword height that breaks ground linearly reduces from flank of tooth front end to flank of tooth rear end, and the tread degree that breaks ground is 0.1~0.2 times of face width of tooth, and flank of tooth front end and sword front end of breaking ground form obtuse angle, blade tip end break ground for arc, sword both sides of being broken ground in the middle of the flank of tooth are equipped with high-pressure flush hole respectively.Rake teeth described in the utility model is more easy to the injection soil body, so as to adapt to the saturation Extra-fine sand and silt of different compaction rates.Sword and used cooperatively with high-pressure flush by breaking ground, effectively eliminate or reduce influence of the dilatancy effect for rake teeth cutting resistance.In addition, the utility model can select corresponding rake teeth type according to the excavation difficulty of break ground situation and the soil body of rake teeth, therefore, the utility model can greatly reduce rake teeth cutting resistance, so as to lift the dredging efficiency of trailing suction hopper dredger on the whole.
Description
Technical field
The utility model is related in a kind of dredging work on trailing suction hopper dredger rake teeth in dredger, particularly a kind of dredging
The rake teeth of the closely knit Extra-fine sand of saturation and silt.
Background technology
In the prior art, rake teeth cutting resistance is one of suffered main external force in Dredging Process of trailing suction hopper dredger,
The size of rake teeth cutting resistance is the key factor of installed power needed for carrying out Strength co-mputation and determine when trailing suction hopper dredger being designed,
It is also the fundamental of high efficient dredging.
Major port on the very long coastline of China is complicated and changeable with the substrate of approach channel, widely distributed closely knit hardened
Extra-fine sand and silt, this difficult soil property dug directly affects the production efficiency and construction speed of dredger.Such soil is difficult to dig
Pick main reason is that such soil is based on powder and sticking grain, particle is smaller, and permeability is poor.Rake teeth cuts soil body process
In, Jian Zhang areas can formed near the position of crown（Negative pressuren zone）, according to principle of effective stress, the presence of negative pressure has caused effect
Power correspondingly increases, therefore can increase the cutting resistance of rake teeth.Further, since the permeability of the closely knit Extra-fine sand of saturation and silt compared with
Low, current cannot quickly add to Jian Zhang areas so that Jian Zhang areas cannot quickly eliminate, so as to cause cutting resistance persistently to occupy height not
Under.
In addition, closely knit for saturation hardened Extra-fine sand and silt, because it has certain cohesive strength, in mining process
Middle rake teeth is difficult injection, and will not be washed under low speed water effect so that the scouring effect of pumping current is very small.
In sum, the efficiency that trailing suction hopper dredger rake teeth cuts closely knit hardened Extra-fine sand and this kind of soil of silt, one are improved
Aspect will be such that rake teeth is easy in injection soil, on the other hand eliminate the influence of dilatancy effect during the rake teeth cutting soil body.
The content of the invention
Technical problem to be solved in the utility model is to overcome the defect in the presence of above-mentioned prior art, there is provided a kind of
Rake teeth for dredging the closely knit Extra-fine sand of saturation and silt.
The utility model employs following technical proposal and solves its technical problem：One kind is thin for dredging the closely knit powder of saturation
Sand and the rake teeth of silt, are made up of tooth root with the flank of tooth, and the tooth root is in fang platform cone-shaped, and this cone center is equipped with and rake teeth seat phase
Corresponding taper cave, tooth root rear portion is equipped with crozier, it is characterised in that：The sword that breaks ground is equipped with the middle of the flank of tooth of rake teeth, this breaks
Transition is carried out by curved surface between native sword and the flank of tooth, the height of the sword that breaks ground linearly reduces from flank of tooth front end to flank of tooth rear end, breaks ground
The width of sword is 0.1~0.2 times of face width of tooth, and it is obtuse angle that flank of tooth front end and sword front end of breaking ground form angle, blade tip end of breaking ground
It is arcuate structure, the both sides of the sword that broken ground in the middle of the flank of tooth of rake teeth are equipped with high-pressure flush hole respectively.
Rake teeth described in the utility model is more easy to the injection soil body, and adapts to the saturation Extra-fine sand and powder of different compaction rates
Soil.Sword and used cooperatively with high-pressure flush by installing on the flank of tooth to break ground, effectively eliminate or reduce dilatancy effect for
The influence of rake teeth cutting resistance.In addition, the utility model can be selected according to the excavation difficulty of break ground situation and the soil body of rake teeth
Corresponding rake teeth type is selected, therefore, the utility model can greatly reduce rake teeth cutting resistance, so that lifting rake is inhaled on the whole
The dredging efficiency of dredger.
Brief description of the drawings
Fig. 1 is the harrow tooth structure schematic diagram that the utility model wedge shape flank of tooth carries the sword that breaks ground.
Fig. 2 is the rake teeth side view that the utility model wedge shape flank of tooth carries the sword that breaks ground.
Fig. 3 is the rake teeth stereogram that the utility model wedge shape flank of tooth carries the sword that breaks ground.
Fig. 4 is the harrow tooth structure schematic diagram that the utility model rectangle flank of tooth carries the sword that breaks ground.
Fig. 5 is the rake teeth side view that the utility model rectangle flank of tooth carries the sword that breaks ground.
Fig. 6 is the rake teeth stereogram that the utility model rectangle flank of tooth carries the sword that breaks ground.
Fig. 7 is the dredger structural representation for using the utility model rake teeth.
Fig. 8 is the finger placement situation schematic diagram of the utility model embodiment 1.
Fig. 9 is the finger placement situation schematic diagram of the utility model embodiment 2.
Figure 10 is the finger placement situation schematic diagram of the utility model embodiment 3.
Each sequence number is expressed as in figure：
1-movable guard；2-diversion window；3-hydraulic cylinder；4-high-pressure flush house steward；5-fixed body；6-pivot pin；7-spray
Mouth；8-front-seat rake teeth；9-heel row rake teeth；10-nozzle；
11-tooth root；12-crozier；13-platform taper cave；14-flank of tooth；15-break ground sword；16-blade tip end of breaking ground；
17-high-pressure flush hole；18-curved surface.
Specific embodiment
With reference to embodiments and accompanying drawing the utility model will be further described.
Reference picture 1, rake teeth described in the utility model is made up of with the flank of tooth 14 tooth root 11, and tooth root 11 is with the flank of tooth 14 together
Casting is formed, and the tooth root 11 is in fang platform cone-shaped, and this cone center is equipped with the platform taper cave 13 corresponding with rake teeth seat, tooth root
Rear portion is equipped with crozier 12, and the crozier 12 fastens rake teeth after being set to the horizontal cotter way of rake teeth seat using latch.
The utility model is equipped with the sword 15 that breaks ground in the middle of the flank of tooth 14 of rake teeth, in order to avoid stress concentration, the sword 15 that breaks ground
Transition is carried out by curved surface 18 and the flank of tooth 14 between, the height of the sword 15 that breaks ground linearly subtracts from the front end of the flank of tooth 14 to the rear end of the flank of tooth 14
Small, the width of the sword 15 that breaks ground is 0.1~0.2 times of the width of the flank of tooth 14, the front end of the flank of tooth 14 and the front end of sword 15 of breaking ground formed angle theta or
α is obtuse angle, and for arcuate structure, the both sides of the sword 15 that broken ground in the middle of the flank of tooth 14 of rake teeth are equipped with high pressure punching respectively at blade tip end 16 of breaking ground
Water hole 17, washes by water, so by breaking ground what the cutting edge of sword 15 was broken ground along two sides of the sword 15 that breaks ground to crown direction
The active of nozzle 7 in the high-pressure flush hole 17 and the rear end of fixed body 5 arranged on the flank of tooth 14 is used cooperatively simultaneously to Jian Zhang areas high pressure
Bath.
Reference picture 1, Fig. 2 and Fig. 3, the profile of the rake teeth flank of tooth 14 described in the utility model are wedge shape, and inswept rear end is wide, and
And crown forming V-shape.
Reference picture 4, Fig. 5 and Fig. 6, the profile of the rake teeth flank of tooth 14 described in the utility model are rectangle, and front and back end width is equal.
High-pressure flush hole 17 and the distance of the front end of the flank of tooth 14 in above-mentioned two classes rake teeth are the 0.3~0.5 of the length of the flank of tooth 14
Times.
Reference picture 7, the dredger structure of use the utility model rake teeth described briefly below, dredger includes fixed body
5, and by pivot pin 6 and fixed body 5 in rotating the movable guard 1 being connected, the movable guard 1 is by the hydraulic pressure that is fixed on fixed body 5
Cylinder 3 and its hydraulic arm control for extending are rotated around pivot pin 6, and high-pressure flush house steward 4, the rear end of fixed body 5 are fixedly equipped with fixed body 5
The nozzle 7 that can spray water under high pressure is fixedly equipped with, the upper end of movable guard 1 is equipped with diversion window 2, and the lower end of movable guard 1 is fixedly equipped with two
Rake teeth of the row with high-pressure flush hole 17, heel row rake teeth 9 and the front-seat interlaced arrangement of rake teeth 8.
The utility model can select rake teeth of different shapes to be arranged on according to the situation of breaking ground and the excavation difficulty of the soil body
On dredger.
Specifically,
Embodiment 1：Reference picture 8, the embodiment is directed to slightly closely knit saturation Extra-fine sand and silt.
Under this state, the front-seat rake teeth 8 that the lower end of movable guard 1 is fixed is the rake teeth that the wedge-shaped flank of tooth carries the sword 15 that breaks ground, heel row
Rake teeth 9 is rake teeth of the rectangle flank of tooth without the sword 15 that breaks ground.Because such soil is slightly closely knit, injection is comparatively easier to, and through front row
The cutting of rake teeth 8 and the double action of high-pressure flush, the soil body have become more loose, therefore the flank of tooth 14 of heel row rake teeth 9 is
The rectangle flank of tooth, and setting high-pressure flush hole 17 carries out assisted mining thereon.
Embodiment 2：Reference picture 9, the embodiment saturation Extra-fine sand and silt close in being directed to.
Under this state, the front-seat rake teeth 8 that the lower end of movable guard 1 is fixed is the rake teeth that the wedge-shaped flank of tooth carries the sword 15 that breaks ground, heel row
Rake teeth 9 is the rake teeth that the rectangle flank of tooth carries the sword 15 that breaks ground.Because such penus is in medium closely knit, it is more difficult to loose, therefore heel row is harrowed
Tooth 9 installs the sword 15 that breaks ground on the rectangle flank of tooth, in the symmetrical high-pressure flush hole 17 in the both sides of the sword 15 that breaks ground.
Embodiment 3：Reference picture 10, the embodiment is directed to extremely closely knit saturation Extra-fine sand and silt.
Under this state, the front-seat rake teeth 8 that the lower end of movable guard 1 is fixed is the rake teeth that the wedge-shaped flank of tooth carries the sword 15 that breaks ground, heel row
Rake teeth 9 is also the rake teeth that the wedge-shaped flank of tooth carries the sword 15 that breaks ground.Because such soil is extremely closely knit, it is difficult to loose and excavation, before institute
Row's rake teeth 8 and heel row rake teeth 9 use the wedge-shaped rake teeth with high-pressure flush hole 17 and the sword 15 that breaks ground, so in front-seat rake teeth 8
Spaced apart high-pressure flush nozzle 10 is common and heel row rake teeth 9, the nozzle 7 of the rear end of fixed body 5 and heel row rake teeth 9 between
The excavation and broken work of such soil are completed under effect.
Principle during utility model works described briefly below：First dredger is transferred to precalculated position under water, by liquid
The control movable guard 1 of cylinder pressure 3 is rotated around pivot pin 6, and forward and backward row's rake teeth 9 is adjusted to suitable angle.
Then identified speed drags the covering device and advances after being dug according to examination, is cut by two row's rake teeths in movable guard 1
The broken soil body is cut, wherein front row is the wedge-shaped rake teeth with break ground sword 15 and high-pressure flushing hole 17, it is same so what is broken ground
When actively to Jian Zhang areas high-pressure flush, so as to eliminate or reduce influence of the dilatancy effect for cutting resistance.After in movable guard 1
Row's rake teeth 9 selects corresponding rake teeth type according to the excavation difficulty of break ground situation and the soil body of front-seat rake teeth 8, and with front row
Tooth interlaced arrangement.By spaced apart high-pressure flush nozzle between the front end of fixed body 5 and heel row rake teeth 9, on rake teeth
High-pressure flush is used cooperatively, and auxiliary carries out soil excavation and crushed.
The soil body is cut after crushing, and spoil hopper is entered by dredging tube under dredge pump suction, and it is excessive to carry out stowage successively
The operation such as stream and Throwing mud.
The utility model is not restricted to the example lifted herein, in the premise without departing substantially from principle of the present utility model and essence
Under, various changes and modification can be made to these implementation methods, such as forward and backward row's rake teeth also includes half plough type tooth, plough type tooth
Etc. all kinds of flute profiles.Therefore, the utility model is not intended to be limited to embodiment illustrated herein, and is to fit to public with institute herein
The consistent scope most wide of the principle and features of novelty opened.
Claims (4)
1. a kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt, is made up of tooth root with the flank of tooth, and the tooth root is bored in fang platform
The bodily form, this centrum center is equipped with the platform taper cave corresponding with rake teeth seat, and tooth root rear portion is equipped with crozier, it is characterised in that：
Be equipped with the sword that breaks ground in the middle of the flank of tooth of rake teeth, this to break ground and carry out transition by curved surface between sword and the flank of tooth, the height of the sword that breaks ground from
Flank of tooth front end linearly reduces to flank of tooth rear end, and the width of the sword that breaks ground is 0.1~0.2 times of face width of tooth, flank of tooth front end and breaks ground
It is obtuse angle that sword front end forms angle, and for arcuate structure, the both sides of the sword that broken ground in the middle of the flank of tooth of rake teeth are put respectively at blade tip end of breaking ground
There is high-pressure flush hole.
2. a kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt according to claim 1, it is characterised in that：Should
Rake teeth tooth flank profile is wedge shape, and inswept rear end is wide, and crown forming V-shape.
3. a kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt according to claim 1, it is characterised in that：Should
Rake teeth tooth flank profile is rectangle, and front and back end width is equal.
4. a kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt according to claim 1, it is characterised in that：Institute
The high-pressure flush hole stated and 0.3~0.5 times that the distance of flank of tooth front end is flank of tooth length.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621249378.6U CN206256491U (en) | 2016-11-22 | 2016-11-22 | A kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621249378.6U CN206256491U (en) | 2016-11-22 | 2016-11-22 | A kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt |
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| CN206256491U true CN206256491U (en) | 2017-06-16 |
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| CN201621249378.6U Active CN206256491U (en) | 2016-11-22 | 2016-11-22 | A kind of rake teeth for dredging the closely knit Extra-fine sand of saturation and silt |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108203999A (en) * | 2018-02-14 | 2018-06-26 | 中交天航港湾建设工程有限公司 | A kind of dredging drag head single side bath vomerine tooth |
| CN108222117A (en) * | 2018-02-14 | 2018-06-29 | 中交天航港湾建设工程有限公司 | A kind of dredging drag head flying wing type vomerine tooth |
| CN108316376A (en) * | 2018-02-14 | 2018-07-24 | 中交天航港湾建设工程有限公司 | A kind of dredging drag head triangular edge tooth |
| CN109629622A (en) * | 2019-01-10 | 2019-04-16 | 中交上海航道局有限公司 | A kind of drag suction dredger drag head |
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2016
- 2016-11-22 CN CN201621249378.6U patent/CN206256491U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108203999A (en) * | 2018-02-14 | 2018-06-26 | 中交天航港湾建设工程有限公司 | A kind of dredging drag head single side bath vomerine tooth |
| CN108222117A (en) * | 2018-02-14 | 2018-06-29 | 中交天航港湾建设工程有限公司 | A kind of dredging drag head flying wing type vomerine tooth |
| CN108316376A (en) * | 2018-02-14 | 2018-07-24 | 中交天航港湾建设工程有限公司 | A kind of dredging drag head triangular edge tooth |
| CN109629622A (en) * | 2019-01-10 | 2019-04-16 | 中交上海航道局有限公司 | A kind of drag suction dredger drag head |
| CN109629622B (en) * | 2019-01-10 | 2023-12-08 | 中交上海航道局有限公司 | Drag head of drag suction dredger |
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