CN114215134A - Strong crushing reamer - Google Patents
Strong crushing reamer Download PDFInfo
- Publication number
- CN114215134A CN114215134A CN202111659015.5A CN202111659015A CN114215134A CN 114215134 A CN114215134 A CN 114215134A CN 202111659015 A CN202111659015 A CN 202111659015A CN 114215134 A CN114215134 A CN 114215134A
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- Prior art keywords
- reamer
- pressure flushing
- cutter
- pressure
- teeth
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- 238000011010 flushing procedure Methods 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 239000002689 soil Substances 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 230000009471 action Effects 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims 1
- 239000004927 clay Substances 0.000 abstract description 6
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/282—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with rotating cutting or digging tools
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
- E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
- E02F3/9237—Suction wheels with axis of rotation in transverse direction of the longitudinal axis of the suction pipe
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/287—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with jet nozzles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2858—Teeth characterised by shape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a powerful crushing reamer which comprises a bottom ring, a shaft hub, a cutter arm, reamer teeth, a high-pressure flushing pipe system and a reamer transmission shaft, wherein the bottom ring is provided with a plurality of through holes; through installing high pressure flushing pipe system on traditional reamer head, increase reamer head ability of breaking ground, clear away the last clay matter of reamer, reach the mesh that reduces reamer tooth wearing and tearing volume, reduce the clay and block up, improve reamer excavation efficiency.
Description
Technical Field
The invention belongs to the field of dredging engineering cutter suction dredger excavating machinery, and particularly relates to a powerful crushing reamer.
Background
In the dredging industry, an autonomous drag suction dredger is a mainstream ship type for large-scale port channel dredging, and a modern drag suction dredger is mainly used for mechanically cutting through rake teeth arranged at the bottom of a rake head and is assisted with high-pressure flushing water to ensure larger dredging depth and soil breaking amount, and then is sucked into a mud cabin through a mud pump. The high-pressure water jet is applied to the drag suction dredger, but the reamer is a rotating piece, the drag head is a translation piece, and the arrangement of the high-pressure water jet rotated by the reamer is not related to application. However, the pressure of high-pressure jet flow commonly used by domestic drag suction ships is only 1-2MPa (10kg), and the drag suction ship can only be suitable for loose soil, and when the drag suction ship meets the conditions of cohesive soil, hard soil, hardened soil and the like with smaller permeability coefficient, the shearing strength of the soil is high, the action of the high-pressure jet flow is obviously reduced, so that the cutting depth of rake teeth is insufficient, the resistance is increased, and the dredging efficiency is low. Meanwhile, hard clay and weathered rock are broken into large blocks during excavation, and the blocks are easy to block the drag head and the mud pump. For this reason, CN206707991U discloses an adjustable ultrahigh pressure jet device. The high-pressure water jet cutting technology is an important aspect of the application of the water jet technology and is applied to various engineering fields. In the research on the cutting of the hard soil by the high-pressure water jet, due to the superposition of a plurality of complex relations such as soil property dynamic change, water jet impact load change, fluid and soil mutual coupling effect and the like, the difficulty of related theoretical discussion and experimental research is increased, so that the internal mechanism and the real physical process of the cutting of the hard soil by the high-pressure water jet cannot be accurately disclosed, and the development and the application of the high-pressure water jet in the soil cutting technology are influenced to a great extent.
In the field of dredging engineering, the construction process is mature for dredging sludge and soft sand bed; however, the construction process of the hard soil bottom bed is still not complete. In general, a cutter suction dredger is used for dredging a hard soil-like bed. However, as the channels deepen gradually at home and abroad, the dredging projects of hard soil such as hard clay, cemented sand, rock substrate and the like are increased continuously, how to solve the problem of high-efficiency operation of the cutter suction dredger in the dredging projects is an important direction for expanding the application range (excavating harder soil) of the cutter suction dredger, and the research and development of the high-pressure water flushing reamer is the key to be solved in the prior art.
Cutter suction dredger when excavating hard soil may encounter several major problems as follows:
firstly, when the soil quality is hard, the reamer is difficult to dig into the soil, an ideal digging effect is difficult to obtain only by increasing the cutting power of the reamer, and the soil breaking capability is poor;
secondly, the hard clay with strong viscosity is easy to stick the reamer or form balls to block the suction port, and the bridge frame needs to be retracted to clear the blockage of the reamer, so that the shutdown is frequent and the efficiency is low.
Thirdly, with the improvement of the compressive strength of the rock, the technical problems of the cutter-suction dredger such as the aggravation of the abrasion of the cutter teeth and the reduction of the service life are caused in the construction process, and the excavating efficiency of the cutter is further influenced.
Disclosure of Invention
The invention aims at the problems in the prior art to improve the reamer head, and provides a powerful crushing reamer.
Technical scheme
A powerful crushing reamer comprises a bottom ring 1, a shaft hub 2, a cutter arm 3, reamer teeth 4 and a reamer transmission shaft 6; the reamer comprises a plurality of shaft hubs 2, a plurality of cutter arms 3 and a plurality of reamer teeth 4;
it is characterized by also comprising a high-pressure flushing pipe system 5;
the reamer transmission shaft 6 is of a hollow structure, one end of the reamer transmission shaft is connected with the motor, and the other end of the reamer transmission shaft is connected with the shaft hub 2; the high-pressure flushing pipe system 5 is arranged in the reamer structure and provides high-pressure jet flow for the reamer teeth 4 to assist the reamer teeth 4 in cutting soil.
The bottom ring 1 is positioned at the bottom of the reamer, is a circular ring type rigid body and is used as a base for supporting the whole reamer; the shaft hub 2 is curved, one end of the shaft hub is connected with the inner side of the bottom ring 1, and the other end of the shaft hub is connected with the outer side of the reamer transmission shaft; the lower part of the cutter arm 3 is welded with the bottom ring 1, the side part of the cutter arm is welded with the outer side of the shaft hub 2, and a plurality of grooves 31 are arranged in the cutter arm 3; the cutter arms 3 and the shaft hubs 2 form a reamer internal supporting structure; the single cutter arm 3 is provided with reamer teeth 4 distributed in rows, and when the reamer rotates, the reamer teeth 4 are used for cutting soil.
The high-pressure flushing pipe system 5 comprises water outlet holes 56, the water outlet holes 56 are distributed on one side of the working face of the cutter arm, high-pressure water jet is ejected through the water outlet holes 56 of the working face of the cutter arm, impact energy is applied to the hard soil on the cutting position of the next cutter in advance, and cutting and smashing are carried out.
The high-pressure flushing pipe system 5 is designed as a cascade.
The grading system comprises a main high-pressure flushing pipe 51, a shaft hub cavity 52, a high-pressure flushing pipe 53, a branch high-pressure flushing pipe 54, a nozzle 55, a water outlet hole 56 and a bump 57; the high-pressure flushing main pipe 51 is arranged in the hollow structure of the reamer transmission shaft 6; a hub cavity 52 of the hub 2 is positioned at the bottom of the reamer transmission shaft 6 and is used for connecting a high-pressure flushing main pipe 51 and a high-pressure flushing pipe 53; the high-pressure flushing pipes 53 are respectively arranged in the grooves 31 prefabricated in the cutter arms 3; each high-pressure flushing pipe 53 is communicated with the reamer teeth 4 distributed in a scattered manner through a high-pressure flushing branch pipe 54 distributed in a scattered manner; the lug 57 is arranged at the rear part of the reamer tooth 4, and a water outlet hole 56 is formed in the middle of the lug; each of the nozzles 55 is installed in a prefabricated outlet hole 56 and connected to the high pressure flushing branch pipe 54 through a screw joint.
The rear part of each reamer tooth 4 is provided with a nozzle 55, and the direction of the nozzle 55 is consistent with the direction of the reamer tooth 4.
The water outlet holes 56 distributed on the working surface side of the tool arm support the following coordination of actions:
the reamer transmission shaft 6 is driven by a motor to drive a high-pressure water jet of a high-pressure flushing pipe system 5 for driving a reamer head to assist the preposed action of crushing hard soil, and simultaneously, the reamer 100 is driven to rotate so that the reamer teeth 4 start the action of excavating the hard soil.
The method is suitable for the working condition of hard soil, and the external matching condition is set as follows: setting a high-pressure pump station, wherein the high-pressure value range is as follows: from 10bar to 400 bar.
The reamer drives the shaft hub to rotate through a specially-made hollow transmission shaft and transversely excavate along a construction surface, and simultaneously utilizes high-pressure water provided by a high-pressure pump station to apply impact energy to hard soil at the cutting position of the next cutter in advance for cutting and crushing; then the reamer teeth are cut into the high-pressure water jet pre-cutting position, the cut hard soil is dug up, and the hard soil is sucked by a suction pipe in the reamer. High-pressure water jet can also be used for carrying out high-pressure water washing on the positions which are easy to block, such as the space between the knife edges and the like in advance, so that the phenomenon that the reamer is blocked by clay is reduced.
Advantageous effects
Compared with the traditional reamer, the powerful crushing reamer provided by the invention has the advantages that the high-pressure flushing pipe system is utilized to increase the ground breaking capacity of the reamer teeth, the cutting efficiency is improved, the aim of assisting the reamer in crushing hard soil is fulfilled, the abrasion phenomenon of the reamer teeth can be relieved, and the service life and the construction efficiency of the reamer teeth are improved.
Drawings
FIG. 1 is a schematic axial side view of a reamer according to a preferred embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1 taken in the direction of the reamer drive shaft;
FIG. 3 is a cross-sectional view of the bottom ring position of FIG. 2;
FIG. 4 is a longitudinal sectional view of a reamer in a preferred embodiment of the present invention in a constructed state;
fig. 5 is an enlarged view of a portion B of fig. 4.
In the figure:
Detailed Description
The technical solutions provided in the present application will be further described with reference to the following specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent in conjunction with the following description.
It should be noted that the embodiments of the present application have a better implementation and are not intended to limit the present application in any way. The technical features or combinations of technical features described in the embodiments of the present application should not be considered as being isolated, and they may be combined with each other to achieve a better technical effect. The scope of the preferred embodiments of this application may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The drawings in the present application are in simplified form and are not to scale, but rather are provided for convenience and clarity in describing the embodiments of the present application and are not intended to limit the scope of the application. Any modification of the structure, change of the ratio or adjustment of the size of the structure should fall within the scope of the technical disclosure of the present application without affecting the effect and the purpose of the present application. And the same reference numbers appearing in the various drawings of the present application designate the same features or components, which may be employed in different embodiments.
To better illustrate the structure of the present invention, the reamer 100 and the suction pipe 7 are introduced.
Fig. 1 and 2 show a powerful crushing reamer, which comprises a bottom ring 1, a shaft hub 2, a cutter arm 3, reamer teeth 4, a high-pressure flushing pipe system 5 and a reamer transmission shaft 6; the reamer comprises a plurality of shaft hubs 2, a plurality of cutter arms 3 and a plurality of reamer teeth 4;
the bottom ring 1 is positioned at the bottom of the reamer, is a circular ring type rigid body and is used as a base for supporting the whole reamer; the shaft hub 2 is curved, one end of the shaft hub is connected with the inner side of the bottom ring 1, and the other end of the shaft hub is connected with the outer side of the reamer transmission shaft; the lower part of the cutter arm 3 is in welding contact with the bottom ring 1, the side part of the cutter arm is in welding contact with the outer side of the shaft hub 2, and a plurality of grooves 31 are arranged in the cutter arm 3; the cutter arms 3 and the shaft hubs 2 form a reamer internal supporting structure; the single cutter arm 3 is provided with reamer teeth 4 distributed in rows, and when the reamer rotates, the reamer teeth 4 are used for cutting soil; the reamer transmission shaft 6 is of a hollow structure, one end of the reamer transmission shaft is connected with the motor, and the other end of the reamer transmission shaft is connected with the shaft hub 2;
as shown in fig. 4, the high-pressure flushing pipe system 5 is a grading system, is arranged in the reamer structure, and includes a main high-pressure flushing pipe 51, a hub cavity 52, a high-pressure flushing pipe 53, a branch high-pressure flushing pipe 54, a nozzle 55, a water outlet 56, and a projection 57; the high-pressure flushing main pipe 51 is arranged in the hollow structure of the reamer transmission shaft 6; a hub cavity 52 of the hub 2 is positioned at the bottom of the reamer transmission shaft 6 and is used for connecting a high-pressure flushing main pipe 51 and a high-pressure flushing pipe 53; the high-pressure flushing pipes 53 are respectively arranged in the grooves 31 prefabricated in the cutter arms 3; each high-pressure flushing pipe 53 is communicated with the reamer teeth 4 distributed in a scattered manner through a high-pressure flushing branch pipe 54 distributed in a scattered manner; the lug 57 is arranged at the bottom of the reamer tooth 4, and a water outlet hole 56 is formed in the middle of the lug; each of the nozzles 55 is installed in a prefabricated outlet hole 56 and connected to the high pressure flushing branch pipe 54 through a screw joint.
The powerful crushing reamer provided by the invention has the following specific use steps:
firstly, a reamer drive shaft 6 driven by a motor drives a reamer 100 to rotate, so that reamer teeth 4 start to excavate hard soil;
secondly, high-pressure water provided by the high-pressure pump station is sprayed out from a nozzle 55 in a water outlet hole 56 reserved in a convex block 57 through a high-pressure flushing pipe system 5 arranged in the inner part of a reamer transmission shaft 6, the surface layer of a reamer arm 3, the rear end of a reamer tooth 4 and the like, and impact energy is applied to hard soil on the cutting position of the next cutter in advance to perform cutting and crushing, namely precutting;
thirdly, the reamer teeth 4 cut into the pre-cutting position of the high-pressure water jet to dig up the cut hard soil, and the dug hard soil is sucked in by the suction pipe 7 as shown in fig. 3.
The high-pressure water jet used by the invention takes water as a working medium, in the embodiment, a certain amount of medium can obtain extremely high energy density through a high-pressure pump station, and then is sprayed out from a nozzle to form a high-speed water jet. After the hard soil is impacted and broken by using the impact energy of the high-speed water flow beam which is large enough, the reamer teeth are cut into the hard soil, so that the soil breaking capacity of the reamer teeth can be increased, and the aim of assisting the reamer in breaking the hard soil is fulfilled.
As shown in fig. 4 and 5, in this embodiment, the high-pressure water jet ejected from the nozzle 55 in the water outlet 56 reserved in the bump 57 is used to apply impact energy to the hard soil at the cutting position of the next cutter in advance for cutting and crushing, so as to alleviate the abrasion of the reamer teeth 4 and improve the service life of the reamer teeth 4.
It should be understood that the drawings are not necessarily to scale. In certain instances, details that are not necessary for an understanding of the present invention or that render other details difficult to perceive may have been omitted. It should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (8)
1. A powerful crushing reamer comprises a bottom ring (1), a shaft hub (2), a cutter arm (3), reamer teeth (4) and a reamer transmission shaft (6); the reamer comprises a plurality of shaft hubs (2), a plurality of cutter arms (3) and a plurality of reamer teeth (4);
characterized in that the device also comprises a high-pressure flushing pipe system (5);
the reamer transmission shaft (6) is of a hollow structure, one end of the reamer transmission shaft is connected with the motor, and the other end of the reamer transmission shaft is connected with the shaft hub (2); the high-pressure flushing pipe system (5) is arranged in the reamer structure and provides high-pressure jet flow for the reamer teeth (4) to assist the reamer teeth (4) in cutting soil.
2. A power crushing reamer as claimed in claim 1 wherein:
the bottom ring (1) is positioned at the bottom of the reamer, is an annular rigid body and is used as a base for supporting the whole reamer; the shaft hub (2) is curved, one end of the shaft hub is connected with the inner side of the bottom ring (1), and the other end of the shaft hub is connected with the outer side of the reamer transmission shaft; the lower part of the cutter arm (3) is welded with the bottom ring (1), the side part of the cutter arm is welded with the outer side of the shaft hub (2), and a plurality of grooves (31) are arranged in the cutter arm (3); the cutter arms (3) and the hubs (2) form an internal supporting structure of the reamer; the cutter arms (3) are respectively provided with cutter teeth (4) which are distributed in a dispersed manner, and when the cutter rotates, the cutter teeth (4) are used for cutting soil.
3. A power crushing reamer as claimed in claim 2 wherein: the high-pressure flushing pipe system (5) comprises water outlets (56), the water outlets (56) are distributed on one side of the working face of the cutter arm, high-pressure water jet is ejected through the water outlets (56) on the working face of the cutter arm, impact energy is applied to hard soil on the cutting position of the next cutter in advance, and cutting and smashing are carried out.
4. A power crushing reamer as claimed in claim 3 wherein:
the high-pressure flushing pipe system (5) is designed as a staging system.
5. A power crushing reamer as claimed in claim 4 wherein:
the grading system comprises a high-pressure flushing main pipe (51), a shaft hub cavity (52), a high-pressure flushing pipe (53), a high-pressure flushing branch pipe (54), a nozzle (55), a water outlet hole (56) and a convex block (57); the high-pressure flushing main pipe (51) is arranged in the hollow structure of the reamer transmission shaft (6); a hub cavity (52) of the hub (2) is positioned at the bottom of the reamer transmission shaft (6) and is used for connecting a high-pressure flushing main pipe (51) and a high-pressure flushing pipe (53); the high-pressure flushing pipes (53) are respectively arranged in grooves (31) prefabricated in the cutter arms (3); each high-pressure flushing pipe (53) is communicated with the cutter teeth (4) distributed in a scattered way through a high-pressure flushing branch pipe (54) distributed in a scattered way; the convex block (57) is arranged at the rear part of the reamer tooth (4), and a water outlet hole (56) is formed in the middle of the convex block; and each nozzle (55) is arranged in a prefabricated water outlet hole (56) and is connected with the high-pressure flushing branch pipe (54) through a threaded joint.
6. A power crushing reamer as claimed in claim 1, characterized in that a nozzle (55) is mounted at the rear of each reamer tooth (4), the direction of the nozzle (55) being in line with the direction of the reamer tooth (4).
7. A power crushing reamer as claimed in claim 3, wherein the water outlets (56) distributed on the working surface side of the arms support the following coordination:
the reamer transmission shaft (6) is driven by the motor to drive the high-pressure flushing pipe system (5) of the reamer head to assist in the preposed action of crushing the hard soil by high-pressure water jet, and simultaneously the reamer is driven to rotate so that the reamer teeth (4) start to excavate the hard soil.
8. A powerful crushing reamer as claimed in claim 7, wherein the external mating conditions are set for hard soil conditions: setting a high-pressure pump station, wherein the high-pressure value range is as follows: from 10bar to 400 bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111659015.5A CN114215134A (en) | 2021-12-30 | 2021-12-30 | Strong crushing reamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111659015.5A CN114215134A (en) | 2021-12-30 | 2021-12-30 | Strong crushing reamer |
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| Publication Number | Publication Date |
|---|---|
| CN114215134A true CN114215134A (en) | 2022-03-22 |
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ID=80707237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111659015.5A Pending CN114215134A (en) | 2021-12-30 | 2021-12-30 | Strong crushing reamer |
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|---|---|---|---|---|
| US4327507A (en) * | 1979-05-28 | 1982-05-04 | Hollandsche Aanneming Maatschappij B.V. | Rotary cutter head with jet flushing blades |
| US4573743A (en) * | 1983-12-22 | 1986-03-04 | M.A.N. Maschinenfabrik Augsburg-Nurnberg | Bucketwheel excavator with oscillating nozzles |
| ITTO990301A1 (en) * | 1999-04-15 | 2000-10-15 | Trevi Spa | EXCAVATION TOOL AND PROCEDURE FOR THE FORMATION OF A COLONNADI CONSOLIDATED LAND. |
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| CN106120939A (en) * | 2016-08-17 | 2016-11-16 | 中交天航港湾建设工程有限公司 | A kind of dredger strongly breaks ground reamer |
| CN207109905U (en) * | 2017-07-18 | 2018-03-16 | 中港疏浚有限公司 | A kind of drag head movable guard |
| CN108993974A (en) * | 2018-08-20 | 2018-12-14 | 中交疏浚技术装备国家工程研究中心有限公司 | Clear up the system and method for cutter suction dredger reamer head automatically using high-pressure jet |
| CN212641567U (en) * | 2020-04-21 | 2021-03-02 | 中交广州航道局有限公司 | High-pressure flushing structure of drag head |
| CN111576517A (en) * | 2020-05-14 | 2020-08-25 | 周鲲鹏 | Integrated high-pressure anti-blocking suction excavation dredging equipment |
| CN112709274A (en) * | 2020-12-22 | 2021-04-27 | 武汉理工大学 | Water-spraying jet rock digging device of dredging dredger |
| CN113026846A (en) * | 2021-03-15 | 2021-06-25 | 中港疏浚有限公司 | Drag head for excavating clay |
| CN216973547U (en) * | 2021-12-30 | 2022-07-15 | 中交疏浚技术装备国家工程研究中心有限公司 | Powerful crushing reamer |
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