EP0357652A1 - Tete d'extraction fonctionnant a l'air comprime. - Google Patents

Tete d'extraction fonctionnant a l'air comprime.

Info

Publication number
EP0357652A1
EP0357652A1 EP88903817A EP88903817A EP0357652A1 EP 0357652 A1 EP0357652 A1 EP 0357652A1 EP 88903817 A EP88903817 A EP 88903817A EP 88903817 A EP88903817 A EP 88903817A EP 0357652 A1 EP0357652 A1 EP 0357652A1
Authority
EP
European Patent Office
Prior art keywords
compressed air
bulk material
housing
head according
inlet opening
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
EP88903817A
Other languages
German (de)
English (en)
Other versions
EP0357652B1 (fr
Inventor
Johann Winter
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT88903817T priority Critical patent/ATE71999T1/de
Publication of EP0357652A1 publication Critical patent/EP0357652A1/fr
Application granted granted Critical
Publication of EP0357652B1 publication Critical patent/EP0357652B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • E02F3/907—Measuring or control devices, e.g. control units, detection means or sensors
    • 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
    • E02F3/9243—Passive suction heads with no mechanical cutting means
    • E02F3/925—Passive suction heads with no mechanical cutting means with jets
    • 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
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/10—Pipelines for conveying excavated materials
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C50/00—Obtaining minerals from underwater, not otherwise provided for

Definitions

  • the invention relates to a compressed air conveying head for bulk material stored under water, in particular sand and gravel, with a housing, with a base plate provided at the bottom of the housing and forming a bulk material inlet opening, and with a flange plate on top of the housing for connecting a bulk material. Delivery pipe and a compressed air line.
  • a conveyor head of this type is known from DE-OS 22 41 526.
  • the conveying capacity is often not optimal because of the compressed air supply only from the side and a bulk material inlet opening which also runs laterally.
  • strong, asymmetrical wear phenomena occur in this conveyor head, which necessitate frequent maintenance and repair.
  • a connecting pipe running in the interior of the housing between the base plate and the flange plate and enclosing the bulk material inlet opening to form an annular compressed air space between the inner wall of the housing and the outer wall of the connecting pipe,
  • Non-return flaps for controlling the compressed air outlet from the compressed air outlet openings.
  • FIG. 1 schematically shows a compressed air delivery head during the dismantling of bulk material stored under water
  • FIG. 2 shows a longitudinal sectional view of the conveying head from FIG. 1;
  • Figure 3 is a cross-sectional view taken along line 3-3 in Figure 2;
  • Fig. 4 is a partial sectional view taken along line 4-4 in Fig. 3 and
  • 5 shows a longitudinal sectional view of another embodiment.
  • the device shown in Fig. 1 comprises a floating body 1, on which a known baffle container 2 with a drainage channel 3 is arranged.
  • winch jacks 4 and 5 are arranged on the floating body 1 on the left and right, each of which carries a motor-driven winch 6 or 7.
  • Ropes 8, 9 lead from these winches - indicated by dash-dotted lines in FIG. 1 - to a conveying head 10 which is connected to the impact container 2 via a telescopic, length-adjustable conveying tube 11.
  • a compressed air line 12 runs parallel to the delivery pipe 11, which on the one hand opens into the delivery head 10 and on the other hand is connected to a compressed air pump (not shown) arranged on the floating body 1.
  • pressure water can also be used as the pressure medium.
  • the line 12 is a windable hose.
  • a block-shaped housing 16 with rear wall 17, front wall 18 and left and right side walls 19 and 20 has a bottom plate 21 at the bottom and a flange plate 22 at the top, which in turn consists of two layers 23, 24, which in turn are connected and stiffened by gusset plates 25 .
  • Compressed air line 12 are flanged to the flange plate 22, namely its upper layer 24 in a conventional manner.
  • the rectangular base plate 26 encloses a bulk material inlet opening 26.
  • a cylindrical connecting tube 27 surrounds the bulk material inlet opening in such a way that an annular compressed air space 28 extends between the inner wall of the housing 16 and the outer wall of the connecting tube 27 is formed, the outside of a rectangular, for. B. square and inside has a circular contour.
  • a rectangular box 29 is arranged on the side of the housing 16, the interior 30 of which is connected on the one hand to the compressed air line 12 via a pipe socket 31 and on the other hand to the annular compressed air space 28 via an opening.
  • a plurality of compressed air outlet openings A, B, C, D, E and F are arranged in the base plate 21 in the region of the compressed air space 28 (cf. FIG. 3) at mutual distances around the bulk material inlet opening 26, and open downwards into the open air.
  • Each of these outlet openings is equipped with a spring-loaded non-return flap 33 which, with the interposition of a ring 34 screwed to the base plate 21 and a sealing covering 35 connected to the flap 33, from below to the bottom Outlet opening A can be sealingly applied.
  • a spring-loaded non-return flap 33 which, with the interposition of a ring 34 screwed to the base plate 21 and a sealing covering 35 connected to the flap 33, from below to the bottom Outlet opening A can be sealingly applied.
  • Bush 36 firmly welded, which has a compressed air inlet opening 37 on the side.
  • the sleeve 36 is located in the compressed air space 28, so that compressed air can enter through the opening 37.
  • the non-return flap -33 is connected to a rod 38 which extends coaxially in the bush 36 and which can be moved up and down in a solid chuck 39 which fills the bush 36 at the top (arrow P).
  • a plate 41 With the upper end of the rod 38 there is a plate 41 firmly connected, which is movable in a recess 42 of the chuck 39. Between the plate 41 and the chuck 39, a compression spring 43 extends around the rod 38 and holds the check valve 33 in the closed state.
  • the piston rod 44 of a double-acting pressure medium unit 45 is also connected.
  • Pressure medium optionally supplied via lines 46, 47 causes the piston rod 44 and thus the flap 33 to be displaced downwards or upwards, so that the pressure medium outlet opening A can be opened or closed arbitrarily.
  • the pressure medium supplied via the lines 46, 47 to the unit 45, which is also arranged in the compressed air chamber 28, comes from a pressure medium unit 48, which (without lines) is indicated schematically in FIG. 2.
  • the pressure medium assembly 48 is located in the interior 30 of the box 29.
  • the pressure medium assembly 48 comprises a pressure medium supply and a pressure medium pump in a conventional manner.
  • pressure medium lines up to the water surface are dispensed with. They are just Electrical control lines are required in order to operate the pressure medium assembly 48 and the valves connected to it accordingly, so that in particular the non-return flaps 33 at the compressed air outlet openings are opened or closed.
  • the box 29 is closed by a removable cover 49, so that the unit 48 is accessible.
  • a wear tube 51 runs inside the connecting tube 27, which is firmly connected on the one hand to the upper layer 24 of the flange plate 22 and on the other hand to a ring 52.
  • a wear ring 53 is arranged below the ring 52.
  • the rings 52, 53 are screwed from below to the base plate 51 in such a way that the openings of the rings 52, 53 enclose the bulk material inlet opening 26.
  • the wear pipe 51 leads into the delivery pipe 11.
  • the tube 51 and the rings 52, 53 are interchangeable parts that can be replaced when worn. Fundamentally, however, the conveying head 10 also functions without the wear tube 51 and the rings 52, 53. However, the connecting tube 27 is then flowed through directly by the conveyed bulk material and is thereby worn out. However, due to the arrangement and design of the air outlet openings A - F described, the signs of wear are considerably less than in the case of previous conveying heads.
  • the described compressed air delivery head works in the following way: After the conveying head 10 has been lowered onto the bulk material stored under water with the aid of the winches 6, 7, compressed air (or compressed water) is introduced into the compressed air space 28 via the compressed air line 12, cf. . the substantially downwardly directed arrows in Figure 2. 'From there the compressed air flows into the laßö réelleen to the Druck Kunststoffaus ⁇ A - a F arranged cans 36th Under the pressure exerted on the non-return flaps 33, these open against the action of the spring 43 (shown in dash-dot lines in FIG. 4), so that the compressed air can exit from the openings A - F and is directed towards the bulk material 15.
  • the compressed air escapes upward through the wear pipe 51 and the delivery pipe 11, water and bulk material being carried along to the water surface to the impact container 2. It is assumed that the pressure medium assembly 45 is out of operation. After the compressed air supply has been switched off, the non-return flaps 33 close under the action of the springs 43. It has been found that because of the arrangement of the outlet openings AF, a uniform, high delivery rate is achieved, wear phenomena being uniform, in particular on the ring 53 and occur on the wear tube 51, and certain areas of the conveyor head are not excessively stressed by the bulk material being removed.
  • the delivery rate can also be influenced favorably if the individual non-return flaps 33 are individually controlled in a certain way with the aid of the pressure medium units 45 assigned to them. It is particularly advantageous to alternate certain groups of non-return valves together to open and close.
  • the flaps 33 at openings A and B can be opened and closed alternately with the flaps at openings C to F. Accordingly, the flaps 33 at the openings C, D or A, B, E, F can be opened and closed alternately. An alternating opening and closing of the openings E, F with respect to the openings A to D is also possible.
  • the check valves 33 can also be controlled in such a way that all openings A to F are alternately open or closed.
  • the respective closing and opening times can be, for example, a few seconds.
  • the control mode depends in each case on the conveying conditions, in particular the water depth, and the nature of the bulk material to be conveyed and can be easily tried out and optimized on the spot.
  • the rear and front walls 17 and 18 of the conveying head housing 16 taper downward and run into tips that penetrate somewhat into the bulk material to be conveyed.
  • these walls are connected by a plurality of inlet regulating strips 54, which are screwed onto the edges of the walls 17, 18 so that they can be replaced individually.
  • the border of the bulk material inlet opening 26 can be modified, depending on how many such strips 54 are attached. It has been found that the conveying capacity can also be changed as a function of the type of bulk material (sand, gravel or the like).
  • An echo probe 55 for measuring the distance between the probe and the bulk material 15 to be conveyed is arranged on the underside of the box 29 enclosing the space 30. Depending on the measured distance, the conveying head 10 is lowered or raised in such a way that it assumes the optimal conveying position. This control of the conveying head 10 can take place fully automatically with the aid of the echo probe 55. In this case, corresponding control signals pass from the echo probe 55 to the winches 6, 7 arranged on the floating body 1, which trigger the corresponding lifting or lowering movements of the conveying head.
  • non-return flaps 33 are only fully drawn in at the outlet openings A and B. In the preferred embodiment are all. Outlet openings A to F such check valves 33 are provided. On the other hand, it is possible to use pressure medium units 45 to control these flaps 33 only on some of the A to F must be provided so that when the compressed air is delivered the check valves 33 in question are kept open by the prevailing pressure until the compressed air supply is switched off again.
  • a total of six outlet openings A to F are provided on the conveying head 10 described.
  • the number of these openings can also be smaller, in particular openings E and F can be omitted. It is essential that these openings are arranged as symmetrically and evenly as possible at the bulk material inlet opening 26.
  • the conveying head can be given a kind of vibrating effect, so that it can be used on the walls 17, 18 Tips provided below digs better into the bulk material 15.
  • this shaking or impact effect can also be used to penetrate hard and tough geological layers, which can sometimes cover gravel deposits or the like.
  • the non-return flaps 33 are arranged directly on the base plate 21 and thus in the immediate vicinity of the bulk material inlet opening 26. It can therefore happen that a bulk part, for example a pebble between the open. Flap 33 and the bottom plate 21 penetrates and blocks the flap. To prevent this, the non-return flaps 33 can be secured at the bottom, for example by grids. It is better to arrange the check valves 33 spatially separated from the bulk material inlet opening 26 and the compressed air outlet openings A to F, so that no bulk material can hinder the function of the non-return valves. Such an embodiment is shown in FIG. 5.
  • FIG. 5 corresponds exactly in the area of its inlet opening 26 to the embodiment according to FIGS. 2 and 3.
  • its base plate 21 according to FIG. 3 there are several, for example four, compressed air outlet openings A, B, C, D symmetrical about the axis the conveyor head around and formed in the compressed air space 28.
  • the non-return plates required for controlling the compressed air outlet are, however, not arranged in the immediate vicinity of these compressed air outlet openings, as will be described later.
  • the interior 29 of which is in turn connected to the compressed air line 12 extends, in contrast to FIGS. 2 and 3, around the entire outer housing 16, as can be seen in FIG. 5.
  • a total of four openings are provided in a base plate 60 of the box 29, of which two openings, namely the openings 61 and 62, are shown in FIG. 5.
  • Each of these openings is flip flap by a rinse ⁇ 33 arbitrarily closed, each non-return valve 33, which is preferably again overloaded federbe ⁇ , an actuating or control device is allocated to 64, for example a pneumatic or e " ' ⁇ ," o r _ i £ : a C ' n ' ⁇ i c: c S e vo Richtunr
  • Each space 65 has an opening 66 which is connected via a pipeline 67 to one of the compressed air outlet openings A, B, C and . D is connected.
  • the flaps 33 are spatially separated from the compressed air outlet openings A to D, so that they cannot be blocked by bulk material.
  • the compressed air-carrying pipes 67 run within the compressed air space 28 between the outer walls of the housing 16 and the connecting pipe 27.
  • the control devices 64 in the space 30 are preferably designed as compressed air operated devices, similar to the arrangement according to FIG. 4. As compressed air, the Compressed air supplied via the compressed air line 12 in the room 30 is used.
  • a control box 68 schematically indicated in FIG. 5 and provided in the space 30 contains valves for actuating the individual control devices 64.
  • the control device 64 or those in the control box can be provided via a ventilation line 69 provided on the box 29 and leading to the water surface 68 provided valves are vented if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Earth Drilling (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

Une tête d'extraction fonctionnant à l'air comprimé utilisée pour extraire des déblais déposés sous l'eau, notamment du sable et du gravier, comprend un logement (16), une plaque de base (21) située au fond du logement et formant un orifice d'admission des déblais et une plaque de bride (22) située en haut du logement pour faire le raccord avec un tuyau d'extraction et un conduit d'air comprimé. Un raccord s'étendant à l'intérieur du logement entre les plaques de base et de bride et entourant l'orifice d'admission des déblais aide à former un espace annulaire à air comprimé entre la paroi intérieure du logement et la paroi extérieur du raccord. La plaque de base comprend dans l'espace à air comprimé plusieurs orifices de sortie d'air comprimé mutuellement espacés, agencés autour de l'orifice d'admission des déblais et pourvus de soupapes de non-retour (sollicites par des ressorts).
EP88903817A 1987-04-28 1988-04-27 Tete d'extraction fonctionnant a l'air comprime Expired - Lifetime EP0357652B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88903817T ATE71999T1 (de) 1987-04-28 1988-04-27 Druckluft-foerderkopf.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873714073 DE3714073A1 (de) 1987-04-28 1987-04-28 Druckluft-foerderkopf
DE3714073 1987-04-28

Publications (2)

Publication Number Publication Date
EP0357652A1 true EP0357652A1 (fr) 1990-03-14
EP0357652B1 EP0357652B1 (fr) 1992-01-22

Family

ID=6326397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88903817A Expired - Lifetime EP0357652B1 (fr) 1987-04-28 1988-04-27 Tete d'extraction fonctionnant a l'air comprime

Country Status (6)

Country Link
US (1) US4995175A (fr)
EP (1) EP0357652B1 (fr)
JP (1) JPH02503337A (fr)
AT (1) ATE71999T1 (fr)
DE (2) DE3714073A1 (fr)
WO (1) WO1988008470A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140759A (en) * 1991-06-14 1992-08-25 M-B-W Inc. Pneumatic device for excavating and removing material
US5285587A (en) * 1993-03-29 1994-02-15 Krenzler Leo M Underwater mining dredge
US6896842B1 (en) 1993-10-01 2005-05-24 Boston Scientific Corporation Medical device balloons containing thermoplastic elastomers
NL9400797A (nl) * 1994-05-16 1996-01-02 Groot Nijkerk Maschf B V De Baggerinrichting.
US5860232A (en) * 1995-12-06 1999-01-19 Concept Engineering Group, Inc. Mobile safe excavation system having a deflector plate and vacuum source
NL1022832C2 (nl) * 2003-02-20 2004-08-23 Bos & Kalis Baggermaatsch Baggerinrichting en -werkwijze.
CN101560781B (zh) * 2009-05-19 2011-03-23 俞建国 一种疏浚吸头
US20120285051A1 (en) * 2009-12-01 2012-11-15 Kryzak Thomas J Environmental Remediation System
IT1403643B1 (it) * 2011-01-21 2013-10-31 Decomar S P A Apparato e metodo di dragaggio per la rimozione di sedimenti da un fondale
US10156057B2 (en) * 2016-10-03 2018-12-18 Vac-Tron Equipment, Llc Rotatable hydro excavation suction wand
FR3078083B1 (fr) * 2018-02-22 2020-02-21 D2E Systeme pour liberer les sediments qui sont au fond de l'eau
CN111485595A (zh) * 2020-03-30 2020-08-04 中国建筑第八工程局有限公司 适用高密闭空间环境下的暗渠机器人清淤施工方法

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Publication number Priority date Publication date Assignee Title
DE858974C (de) * 1949-01-01 1952-12-11 Paul Scheffler Vorrichtung zum Foerdern von Schlamm, Wasser, Ablagerungen u. dgl., insbesondere aus grossen Tiefen
US3301606A (en) * 1966-06-23 1967-01-31 Anthony I Bruno Cyclonic elevator
NL147218B (nl) * 1967-10-16 1975-09-15 Spanstaal Werkwijze en zuigbaggerinstallatie voor het opzuigen van baggerspecie.
NL6714009A (fr) * 1967-10-16 1969-04-18
US3791763A (en) * 1971-03-16 1974-02-12 G Faldi Pump used in dredging systems operating with compressed air
DE2241526A1 (de) * 1972-08-24 1974-03-21 Schuettgutfoerdertechnik Ag Vorrichtung zum foerdern von schuettguetern
US4253255A (en) * 1979-01-08 1981-03-03 Durell William E Automated dredging with vacuum assist
DE2942304C2 (de) * 1979-10-19 1984-11-15 Preussag Ag, 3000 Hannover Und 1000 Berlin Anordnung zum Abbau von Meeressedimenten
US4353174A (en) * 1980-08-11 1982-10-12 Amtec Development Company Electronic control system for pneumatic-hydraulic pump dredge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8808470A1 *

Also Published As

Publication number Publication date
US4995175A (en) 1991-02-26
WO1988008470A1 (fr) 1988-11-03
DE3714073A1 (de) 1988-11-10
EP0357652B1 (fr) 1992-01-22
DE3868062D1 (de) 1992-03-05
JPH02503337A (ja) 1990-10-11
ATE71999T1 (de) 1992-02-15

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