CN202706086U - Symmetrical plough type rake tooth - Google Patents
Symmetrical plough type rake tooth Download PDFInfo
- Publication number
- CN202706086U CN202706086U CN 201220377640 CN201220377640U CN202706086U CN 202706086 U CN202706086 U CN 202706086U CN 201220377640 CN201220377640 CN 201220377640 CN 201220377640 U CN201220377640 U CN 201220377640U CN 202706086 U CN202706086 U CN 202706086U
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- tooth
- rake teeth
- rake
- crown
- tooth root
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Abstract
The utility model provides a symmetrical plough type rake tooth, relating to a fitting of a trailing suction hopper dredger. The utility model provides a rake tooth which is suitable for digging clay by a drag head. The technical scheme of the utility model is that the rake tooth is formed by a tooth root and a tooth tip; the tooth tip and the tooth root are integrally cast; the rake tooth is in bilateral symmetry; the tooth root is in a shape of a square platform cone; a platform tapered hole embedded with a front part cone body of a rake tooth base is arranged at the center of the square platform cone; hook-shaped bodies are respectively arranged at the two sides of the upper end of the tooth root; and after the hook-shaped bodies are sleeved into transverse pin grooves of the rake tooth base, the rake tooth is fastened by plugs. The symmetrical plough type rake tooth is characterized in that the cross section of the tooth tip is in a triangular shape with an opened back side; a plough-shaped arc-shaped surface is formed by tooth surfaces at left and right sides of the tooth tip; and a tooth ridge is formed by crossing the tooth surfaces at the left and right sides.
Description
Technical field
The utility model relates to the rake teeth of raking, sucking mud digging ship dredging facility accessory, especially drag head.
Background technology
The normally used rake teeth of the drag head of trailing suction hopper dredger has cutter type tooth, sharp type tooth, cutter type bath tooth, and rake teeth is rabbeted on the rake teeth seat of drag head.Existing rake teeth can occur that excavating resistance is large, embedded depth is shallow, the weak effect that breaks ground, excavate difficulty, problem that efficiency of construction is low when excavating lam and clay.Its reason is that the cohesion of lam and clay is larger, and bonding is tight between the particle, and shear strength is very high, is unfavorable for the injection of rake teeth, causes the rake teeth excavating resistance to increase, and increases and excavates difficulty.The tradition cutter type tooth cross section shape that is rectangle that buries, when excavating, ground pressure all is distributed on the rectangle flank of tooth, because cutting force disperses, and cause rake teeth to be difficult to the injection soil body, and the rake teeth injection soil body degree of depth is excessively shallow, easily cause drag head built on stilts, drag head vacuum is descended, and reduce digging efficiency; Even if the rake teeth injection soil body is darker, in time do not exhaust such as the soil body after the cutting, will produce bulk deposition at the rectangle rake teeth flank of tooth, cause rake teeth hilling resistance increment, thereby increased the ship resistance of trailing suction hopper dredger, strengthened the dredging cost.Because the hole of lam and clay is very little, high-pressure flush is difficult to the cohesive force of spoiled soil, often be used as impervious soils and process in engineering, so cutter type bath tooth effect when excavating such soil is also undesirable.Point type tooth is mainly used in the excavating rock aspect, because its profile of tooth is sharp-pointed, ability with stronger destruction rock, but when excavating, only have the soil of crown subrange to be excavated, do not produce the effect of digging, therefore the most of soil between rake teeth also maintains the original state, and effect is also undesirable when being applied in excavation lam and clay.In order to increase the depth of penetration of rake teeth, traditional drag head improves drag head weight on the one hand, and hydraulic jack is installed on the other hand, strengthens the ground pressure of rake teeth by the effect of drag head deadweight and hydraulic jack, thereby increases the depth of penetration of rake teeth.On the other hand, in order to reduce the drag head excavating resistance to the impact of trailing suction hopper dredger navigation, often improve the installed power of trailing suction hopper dredger, improve the navigation ability when construction operation.
The utility model content
The purpose of this utility model provides a kind of rake teeth that is applicable to excavate the viscosity scholar.
The technical solution of the utility model: rake teeth is made of tooth root and crown, crown and tooth root are cast into one, the rake teeth bilateral symmetry, the tooth root side of being platform cone shape, the party's platform cone center is a platform taper cave of rabbeting with the anterior cone of rake teeth seat, the both sides of tooth root upper end are respectively equipped with crozier, this crozier adopts latch to fasten rake teeth after being set to the horizontal cotter way of rake teeth seat, the cross section that it is characterized in that crown is the open triangle of rear side, the flank of tooth of the crown left and right sides becomes the plow-shape cambered surface, and the flank of tooth of the left and right sides crosses into the tooth ridge.
The utility model has improved rake teeth cutting soil body thickness by changing rake teeth crown geometry, reduces the rake teeth cutting resistance, thereby is applicable to excavate the viscosity scholar, reaches the effect that improves drag head output.
Description of drawings
Fig. 1 is the partial schematic sectional view of the new rake teeth of this practicality.
Fig. 2 is the schematic diagram of rake teeth seat.
Fig. 3 is the schematic top plan view of the new rake teeth cross section of this practicality.
Fig. 4 is the schematic diagram that rake teeth and rake teeth seat are installed.
Fig. 5 is that rake teeth is installed in the schematic diagram in the drag head movable guard.
The specific embodiment
The utility model (referring to accompanying drawing) rake teeth is made of tooth root 3 and crown 5, crown and tooth root are cast into one, the rake teeth bilateral symmetry, the tooth root side of being platform cone shape, platform cone center, side is a platform taper cave 2 of rabbeting with the anterior cone of rake teeth seat, platform taper cave is used for rake teeth is enclosed within the rake teeth seat, ratch 9 welding in the movable case of rake teeth seat and drag head; The both sides of tooth root upper end are respectively equipped with crozier 1, and the horizontal cotter way 6 rear employing latches 8 that this crozier is set to the rake teeth seat fasten rake teeth; The cross section of crown is the open triangle of rear side, and the best angle at the cross-sectional triangle tip of crown is between 25 °～60 °; The flank of tooth of the crown left and right sides becomes the plow-shape cambered surface, and the flank of tooth of the left and right sides crosses into tooth ridge 4.The utility model rake teeth adapts to the rake teeth seat identical with cutter type tooth, this rake teeth seat is the side's of being conoid type substantially, when spirality circular arc line 7 is made at four rib pin places of side's platform cone, the utility model is then corresponding to be shaped with the spirality circular arc that cooperates with the rake teeth seat in the platform taper cave of tooth root, make the interlocking of rake teeth and rake teeth seat more firm.
Claims (3)
1. symmetrical plough type rake teeth, consisted of by tooth root and crown, crown and tooth root are cast into one, the rake teeth bilateral symmetry, the tooth root side of being platform cone shape, the party's platform cone center is a platform taper cave of rabbeting with the anterior cone of rake teeth seat, the both sides of tooth root upper end are respectively equipped with crozier, this crozier adopts latch to fasten rake teeth after being set to the horizontal cotter way of rake teeth seat, the cross section that it is characterized in that crown is the open triangle of rear side, the flank of tooth of the crown left and right sides becomes the plow-shape cambered surface, and the flank of tooth of the left and right sides crosses into the tooth ridge.
2. a kind of symmetrical plough type rake teeth according to claim 1 is characterized in that the cross-sectional triangle tip angle of crown is between 25 °～60 °.
3. a kind of symmetrical plough type rake teeth according to claim 1 is characterized in that being shaped with the spirality circular arc that cooperates with the rake teeth seat in the platform taper cave of tooth root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377640 CN202706086U (en) | 2012-08-01 | 2012-08-01 | Symmetrical plough type rake tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377640 CN202706086U (en) | 2012-08-01 | 2012-08-01 | Symmetrical plough type rake tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202706086U true CN202706086U (en) | 2013-01-30 |
Family
ID=47586404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220377640 Expired - Lifetime CN202706086U (en) | 2012-08-01 | 2012-08-01 | Symmetrical plough type rake tooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202706086U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222101A (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 two-sided vomerine tooth of band bath |
-
2012
- 2012-08-01 CN CN 201220377640 patent/CN202706086U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222101A (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 two-sided vomerine tooth of band bath |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |