EP0532490A1 - Dredger for removing mud without stirring up sludge and/or other sediments - Google Patents

Dredger for removing mud without stirring up sludge and/or other sediments Download PDF

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Publication number
EP0532490A1
EP0532490A1 EP92870146A EP92870146A EP0532490A1 EP 0532490 A1 EP0532490 A1 EP 0532490A1 EP 92870146 A EP92870146 A EP 92870146A EP 92870146 A EP92870146 A EP 92870146A EP 0532490 A1 EP0532490 A1 EP 0532490A1
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EP
European Patent Office
Prior art keywords
dredger
ladder
sludge
dredger according
funnel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92870146A
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German (de)
French (fr)
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EP0532490B1 (en
Inventor
Luc De Ryck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dredging International NV
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Dredging International NV
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Filing date
Publication date
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Publication of EP0532490A1 publication Critical patent/EP0532490A1/en
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Publication of EP0532490B1 publication Critical patent/EP0532490B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • E02F3/08—Dredgers; Soil-shifting machines mechanically-driven with digging elements on an endless chain
    • E02F3/081—Dredgers; Soil-shifting machines mechanically-driven with digging elements on an endless chain mounted on floating substructures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/005—Equipment for conveying or separating excavated material conveying material from the underwater bottom

Definitions

  • the present invention relates to a dredger in particular for removing accumulations in canals, rivers, narrow waterways, ponds, lakes and the like from the submerged bottom without stirring up sludge and/or other sediments and while adding a minimum amount of water.
  • An object of the invention is therefore to design a dredger which provides a solution for the just sketched problems and which enables to remove the sludge and/or other sediments from watercourses without stirring this material up in the water and this, as already mentioned hereinabove, while adding a minimum amount of water during the vertical transport.
  • the dredger according to the invention is characterized in that it is equipped with at least one funnel which is adjustable under an arbitrary angle and which contains a scraper belt for digging up the sludge and/or other sediments at the lowermost extremity of the funnel and for transporting this material substantially without contact with the surrounding water to the uppermost extremity of the funnel where known means are provided for removing the dredged sludge.
  • Figure 1 is a schematical side elevation view of a dredger according to the invention.
  • Figure 2 is a schematical top plan view of the dredger according to the invention.
  • Figure 3 is, on a larger scale, a schematical longitudinal section of the ladder together with the funnel and the scrape belt moving therein.
  • Figure 4 is a section according to line IV-IV of figure 3.
  • Figure 5 is a section according to line V-V of figure 3.
  • Figure 6 relates to a detail of the invention.
  • Figure 7 relates to a variant of the embodiment according to figure 6.
  • Figure 8 is, on a still larger scale, a cross-section through three funnels near the drive means of the ladders of the dredger according to the invention.
  • the dredger shown in these figures consists of a pontoon 1 comprising a funnel-shaped dump space 2.
  • the hold 3 is provided for mounting components which do not belong to the essence of the invention.
  • a set of, in this case and by way of example, three ladders 4 in such a manner that they can be adjusted between an angle of about 45° and the horizontal plane.
  • a funnel 5 wherein scraper belts 6 are rotatably mounted.
  • the scraper belts 6 carry transverse upright scrapers 7 (more details of these scrapers are shown in figures 3, 4 and 5).
  • the length and the size of the funnel are calculated in such a manner that it allows to dredge or scrape up to a sufficient depth and to transport the dredged mud within each funnel by each set of scraper belts and scrapers cooperating therewith.
  • each funnel 5 is delimited in the longitudinal direction by a top plate 8 and by a supporting plate comprising upright walls 9′. On the frontside, this is at the bottom of the funnel 5, where the sludge is dug up, the lowermost plate 9 ends in the shape of an either or not adjustable knife 9 ⁇ which is an extension of the lowermost extremity of the lowermost plate 9.
  • funnels 5 When use is made, as in the described embodiment, of three funnels 5 disposed next to one another, they can preferably be mutually connected by crossbeams 10 which connect the longitudinal beams 11 of different ladders, locally to one another.
  • the scraper belts 6 are guided around gear wheels 12 at the upper and lower extremity of the longitudinal beams 11.
  • the dredger Since the dredger according to the invention should not be equipped with propellers because they would inevitably stir up the water in the small water courses and in the case that the use of anchor cables on winding drums is for example not flexible or desired, the dredger is moved forwards by means of one or more drive wheels 13.
  • These drive wheels 13 are equipped with radial pins or blades 14, the length of which may possibly be adjustable. In this way, they grip easily into the submerged bottom which is to be dug up and ensure the displacement of the dredger.
  • These wheels 13 can be driven preferably independent from one another so that they can rotate each separately in different directions and/or at different speeds.
  • an adjustable arm 15 mounted onto the stern of the dredger, which arm is provided on its free extremity with at least one drive wheel 16 which is preferably also provided with similar radial pins 17 or blades.
  • the drive wheels 13 at the bottom of the ladders 4 for the propulsion of the dredger it can therefore be moved forward by means of one or more drive wheels 16 on the lower extremity of the arm 15.
  • the ladders 4 can be adjusted under the desired angle, usually in function of the thickness and the level of the sludge layer or submerged bottom to be dug up, by making use of the structure which is shown in figures 6 and 7.
  • Figure 6 shows guiding profiles 18 which are bent downwards above the stam of the dredger and which are fixed on shores 19.
  • Preferably two of such guiding profiles and in particular the two middle most profiles carry a rack, indicated schematically by reference 20 in figure 6, the gear wheels 21 fixed on axles 22 cooperate with.
  • the axles 22 are driven by a motor 23 in one direction or the other in such a manner that the ladders can be disposed in positions which vary between the horizontal position, shown in mixed line in figure 1, and the position under an angle of about 45° as shown in full lines in the same figure 1 and further in figure 6.
  • the axles 22 driven by a motor are mounted in pieces 24 belonging to one of the transverse beams 10.
  • the outermost ladders are only provided with free running wheels 25 (figures 6 and 7).
  • a variant embodiment of the device for pulling up the ladders as shown in figures 6 and 7 is represented finally in figure 8.
  • the ladders 4 or at least the two outer ladders can be provided sideways with a U-shaped gutter profile 26, while two or more support plates 27 are mounted on the dredger which are each provided with a pivot 28. This pivot fits in the U-shaped gutter profile 26.
  • the ladders can be pulled up through a cable 29 upto a position which corresponds substantially to the horizontal plane.
  • the dredger In view of the very particular tasks for which the dredger according to the invention is designed, it is finally further provided with at least two but preferably four horizontally displacable arms 30 which serve as so-called "fenders” and which are provided hereto with wheels 31.
  • the arms 30 can be displaced hydraulically, mechanically through a rack or manually and can be brought in this way in a predetermined position in order to block the dredger in its correct position. Thanks to said arms 30 provided with wheels 31, the dredger can also be displaced laterally either between two banks or two embankents or between walls, when the watercourse flows through a built-up area, such as a city.
  • the dredger By operating the displacable arms 30, the dredger can also be positioned in its correct position on a minimum distance from a bank, an embankment or a wall.
  • the advantages of the dredger are very clear.
  • the dredger can be maintained in its correct position under very particular circumstances without requiring the use of anchors, howsers or piles. Due to the scraping in the closed funnel, very little mud arrives in the surrounding water so that the desired result, i.e. a reduced or nearly unexisting stirring up and no dilution of the mud with water, is obtained. Due to their concept, the scraper belts can be moved in their funnels in either one of both directions. Notwithstanding the limited dimensions of the dredger, it has a very large dredging or scraping capacity because the amount of transported water is insignificant compared to the displaced amounts of sludge and/or other sediments.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention relates to a dredger for removing accumulations in canals, rivers, narrow waterways , ponds, lakes and the like without stirring up sludge and/or other sediments, characterized in that it is equipped with at least one funnel (4) which is adjustable and which contains a scraper belt for digging up the sludge and/or other sediments at the lowermost extremity of the funnel and this without any contact with the surrounding water.

Description

  • The present invention relates to a dredger in particular for removing accumulations in canals, rivers, narrow waterways, ponds, lakes and the like from the submerged bottom without stirring up sludge and/or other sediments and while adding a minimum amount of water.
  • In certain circumstances, when accumulations of sedimented sludge and other fine grained materials have to be removed from narrow waterways, canals and watercourses, for example in built-up areas without stirring up the sludge in the water, because this has to be avoided for example from an ecological point of view, very particular problems arise. As a consequence, use can therefore not be made of the conventional dredging techniques.
  • In the conventional dredging techniques, use is especially made of bucket dredgers which do not meet the stated object at all since the sludge is partially distributed in the water by stirring up and by turbulence during the vertical transport and the stated object can than not be reached at all. Suction dredgers are also not appropriate, partially for the same reasons and also because large amounts of water have to be displaced compared to the amount of dredged sludge. Separating the water and the sludge afterwards back from the so transported mixture is particularly difficult, in other words expensive and/or time consuming. The excess of water defiled with sludge and possibly with polluents contained therein can not be discharged again in the watercourse if the surrounding water has to be kept as clean as possible and as less disturbed as possible under the hereabove sketched circumstances.
  • An object of the invention is therefore to design a dredger which provides a solution for the just sketched problems and which enables to remove the sludge and/or other sediments from watercourses without stirring this material up in the water and this, as already mentioned hereinabove, while adding a minimum amount of water during the vertical transport.
  • In order to realize this according to the invention, the dredger according to the invention is characterized in that it is equipped with at least one funnel which is adjustable under an arbitrary angle and which contains a scraper belt for digging up the sludge and/or other sediments at the lowermost extremity of the funnel and for transporting this material substantially without contact with the surrounding water to the uppermost extremity of the funnel where known means are provided for removing the dredged sludge.
  • Other details and advantages of the invention will become apparent from the following description of a dredger according to the invention. This discription is only given by way of example and does not limit the invention. The reference numerals relate to the annexed figures.
  • Figure 1 is a schematical side elevation view of a dredger according to the invention.
  • Figure 2 is a schematical top plan view of the dredger according to the invention.
  • Figure 3 is, on a larger scale, a schematical longitudinal section of the ladder together with the funnel and the scrape belt moving therein.
  • Figure 4 is a section according to line IV-IV of figure 3.
  • Figure 5 is a section according to line V-V of figure 3.
  • Figure 6 relates to a detail of the invention.
  • Figure 7 relates to a variant of the embodiment according to figure 6.
  • Figure 8 is, on a still larger scale, a cross-section through three funnels near the drive means of the ladders of the dredger according to the invention.
  • The dredger shown in these figures consists of a pontoon 1 comprising a funnel-shaped dump space 2. The hold 3 is provided for mounting components which do not belong to the essence of the invention.
  • On the frontside or on the side which can be considered as the stam is mounted a set of, in this case and by way of example, three ladders 4 in such a manner that they can be adjusted between an angle of about 45° and the horizontal plane. On each ladder 4, further details of which are given hereinafter, there is fixed a funnel 5 wherein scraper belts 6 are rotatably mounted. The scraper belts 6 carry transverse upright scrapers 7 (more details of these scrapers are shown in figures 3, 4 and 5).
  • The length and the size of the funnel are calculated in such a manner that it allows to dredge or scrape up to a sufficient depth and to transport the dredged mud within each funnel by each set of scraper belts and scrapers cooperating therewith.
  • From figure 4 it can be deduced amongst others that each funnel 5 is delimited in the longitudinal direction by a top plate 8 and by a supporting plate comprising upright walls 9′. On the frontside, this is at the bottom of the funnel 5, where the sludge is dug up, the lowermost plate 9 ends in the shape of an either or not adjustable knife 9˝ which is an extension of the lowermost extremity of the lowermost plate 9.
  • When use is made, as in the described embodiment, of three funnels 5 disposed next to one another, they can preferably be mutually connected by crossbeams 10 which connect the longitudinal beams 11 of different ladders, locally to one another. The scraper belts 6 are guided around gear wheels 12 at the upper and lower extremity of the longitudinal beams 11.
  • Since the dredger according to the invention should not be equipped with propellers because they would inevitably stir up the water in the small water courses and in the case that the use of anchor cables on winding drums is for example not flexible or desired, the dredger is moved forwards by means of one or more drive wheels 13. These drive wheels 13 are equipped with radial pins or blades 14, the length of which may possibly be adjustable. In this way, they grip easily into the submerged bottom which is to be dug up and ensure the displacement of the dredger. These wheels 13 can be driven preferably independent from one another so that they can rotate each separately in different directions and/or at different speeds. If necessary, use can be made in an analogous way of an adjustable arm 15 mounted onto the stern of the dredger, which arm is provided on its free extremity with at least one drive wheel 16 which is preferably also provided with similar radial pins 17 or blades. When no use is made of the drive wheels 13 at the bottom of the ladders 4 for the propulsion of the dredger, it can therefore be moved forward by means of one or more drive wheels 16 on the lower extremity of the arm 15.
  • The ladders 4 can be adjusted under the desired angle, usually in function of the thickness and the level of the sludge layer or submerged bottom to be dug up, by making use of the structure which is shown in figures 6 and 7. Figure 6 shows guiding profiles 18 which are bent downwards above the stam of the dredger and which are fixed on shores 19. Preferably two of such guiding profiles and in particular the two middle most profiles carry a rack, indicated schematically by reference 20 in figure 6, the gear wheels 21 fixed on axles 22 cooperate with. The axles 22 are driven by a motor 23 in one direction or the other in such a manner that the ladders can be disposed in positions which vary between the horizontal position, shown in mixed line in figure 1, and the position under an angle of about 45° as shown in full lines in the same figure 1 and further in figure 6. The axles 22 driven by a motor are mounted in pieces 24 belonging to one of the transverse beams 10. The outermost ladders are only provided with free running wheels 25 (figures 6 and 7).
  • A variant embodiment of the device for pulling up the ladders as shown in figures 6 and 7 is represented finally in figure 8.
  • The ladders 4 or at least the two outer ladders can be provided sideways with a U-shaped gutter profile 26, while two or more support plates 27 are mounted on the dredger which are each provided with a pivot 28. This pivot fits in the U-shaped gutter profile 26. The ladders can be pulled up through a cable 29 upto a position which corresponds substantially to the horizontal plane. These structures can be constructed easily and are moreover simple to control.
  • In view of the very particular tasks for which the dredger according to the invention is designed, it is finally further provided with at least two but preferably four horizontally displacable arms 30 which serve as so-called "fenders" and which are provided hereto with wheels 31. The arms 30 can be displaced hydraulically, mechanically through a rack or manually and can be brought in this way in a predetermined position in order to block the dredger in its correct position. Thanks to said arms 30 provided with wheels 31, the dredger can also be displaced laterally either between two banks or two embankents or between walls, when the watercourse flows through a built-up area, such as a city. By operating the displacable arms 30, the dredger can also be positioned in its correct position on a minimum distance from a bank, an embankment or a wall.
  • For removing the sludge collected in the bulk hold 2, use is made of any known technique which does not belong to the essence of the present invention.
  • The advantages of the dredger, the very original concept of which is described hereinabove, are very clear. The dredger can be maintained in its correct position under very particular circumstances without requiring the use of anchors, howsers or piles. Due to the scraping in the closed funnel, very little mud arrives in the surrounding water so that the desired result, i.e. a reduced or nearly unexisting stirring up and no dilution of the mud with water, is obtained. Due to their concept, the scraper belts can be moved in their funnels in either one of both directions. Notwithstanding the limited dimensions of the dredger, it has a very large dredging or scraping capacity because the amount of transported water is insignificant compared to the displaced amounts of sludge and/or other sediments.
  • The invention is of course not limited to the hereabove described embodiment and it could be modified in many ways without leaving the scope of the patent application.

Claims (12)

  1. A dredger in particular for removing accumulations in canals, rivers, narrow waterways, ponds, lakes and the like from the submerged bottom without stirring up sludge and/or other sediments and while adding a minimum amount of water, characterized in that it is equipped with at least one funnel (5) which is adjustable under an arbitrary angle and which contains a scraper belt (6) for digging up the sludge and/or other sediments at the lowermost extremity of the funnel (5) and for transporting this material substantially without contact with the surrounding water to the uppermost extremity of the funnel where known means are provided for removing the dredged sludge .
  2. A dredger according to claim 1, characterized in that it comprises preferably three funnels (5) which are disposed next to one another.
  3. A dredger according to either one of the claims 1 and 2, characterized in that said scraper belt (6) carries transverse scrapers (7) while means are provided for moving the scraper belt (6) in said funnel (5).
  4. A dredger according to any one of the claims 1 to 3, characterized in that said funnels (5) are attached to a ladder (4), the angle of which with respect to the horizontal plane is adjustable.
  5. A dredger according to claim 4, characterized in that at least along one side of said ladder (4), there is provided a guiding profile (18) which runs downwards towards the backside of the dredger and wherein each ladder (4) is guided by two bars carrying each at least one free running support wheel so as to enable the ladder to be disposed under the desired angle.
  6. A dredger according to either one of the claims 4 and 5, characterized in that said ladder is adapted to be displaced with respect to said guiding profile (18) by means of a gear wheel cooperating with a rack (20) provided in said guiding profile, which gear wheel is driven by a motor and is fixed onto an axle mounted in components of the ladder.
  7. A dredger according to claim 4, characterized in that a rack (20) is provided at least along one side of said ladder (4), which rack (20) cooperates with a gear wheel (21) driven by a motor (23) which can be actuated in two opposite directions in order to bring the ladder in and out its operative position.
  8. A dredger according to claim 6, characterized in that said axle (22) and the gear wheels (21) mounted thereon are driven by a motor (23) in one direction or another.
  9. A dredger according to any one of the claims 1 to 7, characterized in that the lowermost portion of said ladder (4) is provided with drive wheels (13).
  10. A dredger according to any one of the claims 1 to 8, characterized in that the side of the dredger opposite said ladder (4) is provided with drive wheels (16) mounted on an arm (15), the height of which is adjustable.
  11. A dredger according to any one of the claims 8 to 10, characterized in that said drive wheels (13, 16) are provided with radial pins (14, 17) of such a length that they can grip into the sludge.
  12. A dredger according to any one of the claims 1 to 10, characterized in that arms (30) adapted to be displaced sideways in the horizontal plane are provided for positioning the dredger with respect to banks, walls of a canal, a river or a narrow waterway.
EP19920870146 1991-09-11 1992-09-11 Dredger for removing mud without stirring up sludge and/or other sediments Expired - Lifetime EP0532490B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9100846A BE1005307A5 (en) 1991-09-11 1991-09-11 DREDGING FOR VEHICLE WITHOUT be stirred SLUDGE AND / OR OTHER SEDIMENT REMOVAL dredged.
BE9100846 1991-09-11

Publications (2)

Publication Number Publication Date
EP0532490A1 true EP0532490A1 (en) 1993-03-17
EP0532490B1 EP0532490B1 (en) 1997-03-12

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EP19920870146 Expired - Lifetime EP0532490B1 (en) 1991-09-11 1992-09-11 Dredger for removing mud without stirring up sludge and/or other sediments

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EP (1) EP0532490B1 (en)
BE (1) BE1005307A5 (en)
DE (1) DE69218083T2 (en)
ES (1) ES2099244T3 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0616082A1 (en) * 1993-03-18 1994-09-21 Baggerbedrijf De Boer Holding B.V. Bucket dredger with spill collection means
KR20010002989A (en) * 1999-06-19 2001-01-15 김복중 Eleminating device of muck on river bed
KR100775467B1 (en) * 2001-09-27 2007-11-12 주식회사 포스코 A direction conversion apparatus of a coal discharging car
CN102172440A (en) * 2010-12-22 2011-09-07 深圳市中邦(集团)建设总承包有限公司 Machine capable of independently stirring and scraping mud
CN102191782A (en) * 2011-03-28 2011-09-21 宝钢发展有限公司 Special tool for cleaning sludge of smelting waste water comprehensive pool
CN101942847B (en) * 2009-07-10 2012-06-20 北京中矿环保科技股份有限公司 Dredging conveyer
CN102606204A (en) * 2012-03-31 2012-07-25 苏国安 Water sump clearing machine for mining
EP2682528A3 (en) * 2012-07-06 2014-02-19 Baggerwerken Decloedt en Zoon Device and method for dredging bed material under water
CN105887958A (en) * 2016-04-14 2016-08-24 西安科技大学 Cleaning device and method for sludge of water sump at bottom of coal mine well
JP2021065217A (en) * 2019-10-22 2021-04-30 張偉萍 Sludge treatment device at bottom of pond for use in fishery irrigation work
CN113107041A (en) * 2021-03-31 2021-07-13 周康 River channel dredging device
CN113550366A (en) * 2021-07-26 2021-10-26 段鹏鹏 Hydraulic engineering desilting device
CN115949112A (en) * 2023-02-16 2023-04-11 桐庐富春水利水电建筑有限公司 River channel desilting auxiliary device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10519625B2 (en) 2013-10-09 2019-12-31 Heriberto Floridor QUIDIANTE DIAZ Dredger actuated from land
CN111173065A (en) * 2020-01-19 2020-05-19 岭南生态文旅股份有限公司 Black and odorous water body sludge excavating and collecting equipment
CN111519683B (en) * 2020-04-28 2021-03-26 宁夏晟博建工有限公司 River channel treatment sludge cleaning treatment method

Citations (5)

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Publication number Priority date Publication date Assignee Title
NL97743C (en) *
DE33455C (en) * 1900-01-01 J. PARKER in Hull, Yorkshire, England Innovation in digging machines
GB690275A (en) * 1948-11-23 1953-04-15 Scottish Seaweed Res Ass Improvements in or relating to apparatus for harvesting under-water seaweed
NL6907346A (en) * 1969-05-13 1970-11-17
NL7105085A (en) * 1971-04-15 1972-10-17

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL97743C (en) *
DE33455C (en) * 1900-01-01 J. PARKER in Hull, Yorkshire, England Innovation in digging machines
GB690275A (en) * 1948-11-23 1953-04-15 Scottish Seaweed Res Ass Improvements in or relating to apparatus for harvesting under-water seaweed
NL6907346A (en) * 1969-05-13 1970-11-17
NL7105085A (en) * 1971-04-15 1972-10-17

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9300482A (en) * 1993-03-18 1994-10-17 Boer Holding Baggerbedrijf De Dredger with spill traps.
EP0616082A1 (en) * 1993-03-18 1994-09-21 Baggerbedrijf De Boer Holding B.V. Bucket dredger with spill collection means
KR20010002989A (en) * 1999-06-19 2001-01-15 김복중 Eleminating device of muck on river bed
KR100775467B1 (en) * 2001-09-27 2007-11-12 주식회사 포스코 A direction conversion apparatus of a coal discharging car
CN101942847B (en) * 2009-07-10 2012-06-20 北京中矿环保科技股份有限公司 Dredging conveyer
CN102172440B (en) * 2010-12-22 2013-12-18 深圳市中邦(集团)建设总承包有限公司 Machine capable of independently stirring and scraping mud
CN102172440A (en) * 2010-12-22 2011-09-07 深圳市中邦(集团)建设总承包有限公司 Machine capable of independently stirring and scraping mud
CN102191782A (en) * 2011-03-28 2011-09-21 宝钢发展有限公司 Special tool for cleaning sludge of smelting waste water comprehensive pool
CN102191782B (en) * 2011-03-28 2012-07-04 宝钢发展有限公司 Special tool for cleaning sludge of smelting waste water comprehensive pool
CN102606204A (en) * 2012-03-31 2012-07-25 苏国安 Water sump clearing machine for mining
EP2682528A3 (en) * 2012-07-06 2014-02-19 Baggerwerken Decloedt en Zoon Device and method for dredging bed material under water
BE1020785A5 (en) * 2012-07-06 2014-05-06 Baggerwerken Decloedt En Zoon DEVICE AND METHOD FOR Dredging BOTTOM MATERIAL UNDER WATER.
CN105887958A (en) * 2016-04-14 2016-08-24 西安科技大学 Cleaning device and method for sludge of water sump at bottom of coal mine well
JP2021065217A (en) * 2019-10-22 2021-04-30 張偉萍 Sludge treatment device at bottom of pond for use in fishery irrigation work
CN113107041A (en) * 2021-03-31 2021-07-13 周康 River channel dredging device
CN113550366A (en) * 2021-07-26 2021-10-26 段鹏鹏 Hydraulic engineering desilting device
CN113550366B (en) * 2021-07-26 2023-06-20 江西昌丰建筑工程有限公司 Hydraulic engineering dredging device
CN115949112A (en) * 2023-02-16 2023-04-11 桐庐富春水利水电建筑有限公司 River channel desilting auxiliary device

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BE1005307A5 (en) 1993-06-22
DE69218083T2 (en) 1997-08-14
DE69218083D1 (en) 1997-04-17
ES2099244T3 (en) 1997-05-16
EP0532490B1 (en) 1997-03-12

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