CA1124753A - Conveying apparatus for the conveying of mud from great depths, more especially ore mud - Google Patents
Conveying apparatus for the conveying of mud from great depths, more especially ore mudInfo
- Publication number
- CA1124753A CA1124753A CA336,096A CA336096A CA1124753A CA 1124753 A CA1124753 A CA 1124753A CA 336096 A CA336096 A CA 336096A CA 1124753 A CA1124753 A CA 1124753A
- Authority
- CA
- Canada
- Prior art keywords
- conveying
- screen
- suction head
- conveying pipe
- water
- 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.)
- Expired
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
- 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
- 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
- E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes
-
- 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
- E02F3/9287—Vibrating suction heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C50/00—Obtaining minerals from underwater, not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air Transport Of Granular Materials (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Combined Means For Separation Of Solids (AREA)
- Pinball Game Machines (AREA)
- Artificial Fish Reefs (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The specification describes a conveying apparatus for the conveying of mud, more particularly ore mud, from great depths with a conveying pipe ending in a suction mouthpiece and provided with a conveying pump.
The specification describes a conveying apparatus for the conveying of mud, more particularly ore mud, from great depths with a conveying pipe ending in a suction mouthpiece and provided with a conveying pump.
Description
~247~3 Conveying apparatus for the conveying of mud from great depths, more especially ore mud.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The invention relates to a conveying apparatus for the conveying of mud, more particularly ore mud, from great depths with a conveying pipe ending in a suction mouthpiece and provided with a conveying pump~
A conveying apparatus of similar type is kno~m which omprises a conveying pipe whose lower end is guided in a in such a manner as to be cylinder to be mobile andLsealed peripherally. A drive device is engaged between the cylinder on the one hand and the lower end of the conveying pipe on the other hand and moves the two parts to and fro relatively to one ano-ther. The cylinder is provided with one or more in~ardly opening non-return valves and the conveying pipe with an upwardly opening non-return valve.
It is also known to construct the hydraulic drive such that it æçrves not only for producing the pump motion but also for produoing high-frequency shaking vibrations. The lower end of the cylinder is conically shaped and terminates in a pointed tip. In the latter there are situated inwardly opening non-return valves~ which are shielded by protective ~ .
'. ' ' ~i24753 grids. The cylinder is provided with supporting feet which are distributed about its periphery. The cylinder or conveying pipe can be provided with a buoyancy body ~hich is adjustable as regards its specific gravity. The shaking movements are intended to assist penetration into the mud and to prevent the formation of channels which might possibly extend through the mud as far as the brine layer (German laid-oFen specification 2707899).
The inventi~like the state o~ the art which has been described has as its object to provide a conveying apparatus for muds with which it is possible to convey even muds of hi~h viscosity over relatively iong dist&nces or under rela-tively high conveying pressures. The conveying apparatus is also to be capable of being used to convey muds at relatively high temperatures. The temperatures of the muds being conveyed may amount to up to about 80. The muds may have a specific gravity of 1.3 g/cm . But muds of higher or lower specific gravity may also be con~eyed with the apparatus proposed by the present invention. The apparatus according to the present invention is also intended more particularly to serve to convey ore-bearing muds from great depths, with a brine zone of a relatively high specific gravity of for example 1.2 g/om3 lying above the ore mud bed. The conveying apparatus i8 to be made sùch that brine from this zone cannot get into the ore mud to be conveyed, or into the conveying apparatus. The ore muds to be conveyed may lie at a depth of about 2,500 m on~the sea floor and have a thickness of about 20 to 100 m. The viscosity of the mud can amount to about 120 c poises.
The ore mud is in a relatively firm layer or deposit ~
which may have thixotropic properties. The substance to be conveyed may be mixed with relatively large lumps such as for example lumps of basalt. The deposits may be covered with a roughly 200m thick layer of concentrated brine. The invention has the further object, as compared with the previously described state of the art, of obviating these difficulties which occur in conveying work.
According to the apparatus of the present invention which is adapted for conveying mud, such as ore mud from ocean depths, there is provided a conveying pipe having a conveying pump and terminating in a suction head, the suction head including a vibrating screen of conical configuration defining a downwardly directed tip, the direction of vibration being vertical.
The apparatus according to the invention has the advantage that the material at the bottom is loosened up by the vibrations, and thus the suction work is considerably facilitated, or the energy required reduced. The screen keeps away all obstacles which might endanger a conveying apparatus equipped with for ; example a centrifugal pump. The brine lying above the deposit is also not sucked-in.
According to a specific embodiment of the invention, the lower end of the conveying apparatus may be provided with pressurized water nozzles. Thus, a plurality of pressurized water nozzles can be situated above the screen on the conveying apparatus. The water jet is directed preferably in the direction of the screen region, or the outer surface of the ,, ' ' ~ `
~i247~3 said screen. It is also possible to arrange pressurized water nozzles in the tip region of the conical screen, these being situated on a holder which extends through the scr,een in the longitudinal direction and is arranged on the conveying apparatus.
The additional application of water under pressure contributes tc the loosening-up of the bottom material. The application of water under pressure allows a controllable dilution and thorough mixing of the loosened-up material.
The apparatus according to the invention can be constructed in various ways. In a simple constructional arrangement of one embodiment of the invention, the conical screen is secured at its ba~e on a supporting device which is guided with play on or in the lower end of the conveying pipe and is mounted to be capable of vibrating in the vertical ,~ . , direction. The lower end of the conveying pipe (suction head) can carry the drive of the vibrating screen. The screen or the supporting ring thereof can be provided with a plurality of connecting bolts which are guided in the vibration direction and are provided at their other end with running rollers bearing on a rotating annular disc which surrounds the conveying pipe and whose surface is provided with undulatory projections and depressions in the vertical direction.
The connecting bolts can carry clamping springs which bear at one end on the base of the vibrating screen and at the other end on an abutment provided on the conveying pipe.
A preload is produced by this arrangement which presses the rollers always against the annular disc.
tm/ ~ -4-~i24753 In the rotation of the cam disc the vibrating screen is moved up and do~n in accordance ~ith the speed of rotation at an adjustable rate of vibration. When the lower end of object the screen disconnects automatically the screen abuts against an L from the vibrating apparatus, so that the driving disc freevrheels.
~ or further protection of the drive a centrifugal clutch can be arranged between the said drive and the annular disc.
In a simple constructional form the annular disc is mounted in self-aligning bearings.
Conveniently the electrical drive is arranged in a special housing (drive support) surrounding the lower end of the conveying pipe, the connecting bolts being taken through to the exterior through water-tight joints. The water-tight sealing arrangement can comprise diaphragm discs which are secured on the connectlng bolts and are held peripherally in the housing. r~he housing can be provided with an oil filling and connected by way of a conduit v~ith a compensation vessel.
The screen can be formed of trapezoidal wires. To guide it, the vibrating screen can carry vertically situated guide plate~ at its external surface.
The suotion head oan be secured on a suction head shank - comprising two concentric pipes the internal of which is the suction pipe, the intervening space being used for the conveying o~ pressurised water. The suction head shank can - - comprise a plurality of pipe lengths, the inner pipes being connected to one another by means of plug and socket joints ___ .. _ _ .. , .. , .. . . . -- -- -- -- .
:~, 7~3 of the pipe lengths with O-ring sealing elements. The outer pipes/on the other hand can be provided vlith other flanges and sealing elements for connection with one another.
~ he suction head, or suction head shank, can be connected by means of a springdamping part to the line of piping leading to the surface. This keeps vibrations away rom the conveying conduit. ~he spring damping part can travel also be provided with aLdistance pickup wh~reby excessive movements of the suction head relatively to the adjoining conveying pipe are indicated. In this way it is possible to monitor in a simple manner for example whe*her the vibrating screen comes to rest on the sea floor.
The pressurised water pipe can be provided with a riser for supplying a water cooling arrangement for the drive motor.
~ he invention will be explained with reference to the constructional example shown diagrammatically in the drawings, wherein :
~ ig. 1 shows the basic construction of the apparatus according to the invention, Fig. 2 sho~s the vibrating screen and its drive in section and on a larger scale, Fig. 3 sho~ls the upper part, following on from Pig.2, Fig. 4 shows in section two pipe lengths whicn hold the suction head, Fig. 5 shows the spring damping part in side view, and :~ ~ . - ':
; .' `
,~
- ~lZ4753 Fig. 6 shows in diagram form the layout of a pressurised water installation.
From the ship A a conveying pipe B goes to the bottom of the sea. The conveying pipe fastening to the ship is not shown in detail.
A pump unit C is interposed in the conveying pipe B, and includes on the one hand the suction pump D and on the other hand the delivery pump E which is supplied with the surrounding sea water.
Secured to the lower portion of the conveying pipe 3 is the suction head shank G, this being secured by means of a spring damping part ~. This shank comprises a plurality of pipe lengths each of which comprise an inner pipe H and an outer pipe I. The inner pipe H s~rves as a suction pipe.
; The intermediate space bet-Yeen the pipes H and I is used for the conveying of water under pressure and is connected via a flexible conduit K to the pressurised water pump E.
The suction head ~ is secured to the lower end of the suction head shank G.
Secured to the lower end of the suction head is the vibrating screen 1, ~hich is of conical shape and at its base is connected to a supporting rin~ 2. ~he screen can be of frame-type construction for reasons of strength. Between the closed tip la and the apertures for the pressurised water application and the supporting ring there are situated at the - periphery three webs 3 between which the individual s&reen segmants ; , '~ ~ , .
~.
1~A753 are welded-in. The screens can have a mesh ~idth of 10 mm.
To obviate blockages, they are made from trapezoidal individual ~ires. Over the three screen segments there are secured guide plates 4 which are conveniently connected on the one hand to the tip and on the other hand to the supporting ring 2.
The supporting ring 2 carries at its periphery three ver-tically guided connecting bolts 5 ~hich are guided within the drive support 6.
~ he drive elements are arranged in the space between the suction pipe H and the protective casing M. There there is secured a submersible motor 7 the axis of which is situated parallel to the suction pipe H and which by way of a pinion 8 drives the annular disc 9, mounted with self-aligning roller bearings, through the agensy of a toothed ring 9a connected with the said disc. This is provided at its upper side with three undulatory projections with identically shaped sine wave form, on which running rollers lOa run, said rollers being secured on a drive ring 10 which connects ~ith one another the upper ends of the connecting bolts 5 Continual bearing contaot of the rollers on the annular disc is ensured by springs 11 which permanently preload the connecting bolts 5 and during nor~al operation prevent the rollers from lifting off. ~hus the rotational movement of the annular disc produces a vibrating movement in the screens.
If the springs are subjected to load - e.g. by undesirably hard impact of the screen on the sea bottom - the running rollers are lifted off, and the annular disc runs ~reèly.
` ~1~17~;3 ~he connecting boltsLare guided in plain bearing sleeves 12.
The annular space of the drive support, which is completely filled with oil, is connected with a compensation tank or vessel 13 for pressure balancing purposes.
For further protection of the drive of the annular disc, a centrifugal clutch 14 is built in between drive motor and drive pinion.
To seal the connecting bolts the latter are provided with rubber diaphragmq 18 which are fiY.ed at their external re~ions in the housing.
~ he oil is used both for lubricatin~ the movable parts and also for temperature exchange between the electric motor and the environment.
In the vicinity of the suction mouthpiece aperture there are secured on the suction head nozzles 15 which are connected by a ring main 15a with one another and with the pressurised water chamber. There is also arranged within the screen 1 a stationary nozzle holder 16 on the endq of which there are secured nozzles 16a which are also supplied from the pressurised water chamber and extend through the tip la of the vibrating screen. ~he nozzles of the outer ring are arranged in groups with different jet directions. The pressurised water is used for removing obstacles and for loosening-up the bottom. ~y modifying the total free outlet cross-section, by interchanging considerable nozzle inserts or by ~he closing of some nozzles, a~umber of - possible operating states can be achieved.
The suction head co=prises a support unit 21 Y~hich holds : , ~
~12~$753 surrounds the screen, the apparatus during assembly,Land is also used for protecting the apparatus when it descends against relatively large lumps of rock or the like.
The spring damping part ~ provides co~pensation for vibrations which may be transmitted from the vibrating creen to the drive support and the shank. At this region with it is possible to measure the pressureLwhich the apparatus presses against the ground or the force required for drawing the apparatus out of the mud, with the use of an inductive travel pickup 22. Length variations of the conveying pipe can be taken up within the spring dampin~ part by means of a steel compensator.
- The water under pressure required for the suction screen is produced by a pressurised water pump 31 which runs on the same shaft as the freouency-regulated main pump. Since a coupling of this kind is disadvantageous for the winning operation, re~lation of throughflo-v is effected by Deans of a flow control~'er32. The design of the pressurised water pump ensures that the nominal delivery or conveying rates are achieved even with the lo~est main pump rotational speed.
Th~ control piston of the flowcontr~er is moved with an electrically operated 4/3way val~e 33. The water under `
pressure is used as working medium for the flow controller and the 4/3 way valve. The quantity of water under pressure is measured with a standard venturi noz~le 34 and a capacitive differelltial pressure pickup 35. ~or venting the control lines during descent, two non-return valves 36 and 37 preceded by .
' ~ :
.
1~7~3 filters are provided.
From the pump unit which is situated at a water depth of approximately 2000 m the ~later under pressure is conducted to the suction screen, which is 200 m deep, with a rubber fabric flexible pipe 38.
~ qithin the suction head a part-~low o~ the pressurised water is used for cooling the motor 7. A fixedly set differential pressure valve 39 connected in parallel opens when a quantity greater than is required for cooling flows through, and thus limits ths pressure loss in the cooling device. After the valve the pressure water branches to the two nozzle arrangements over the screen 1 and in the screen tip la.
The vibration of the screen in conjunction with its conical shape contributes to ensuring that obstacles which come to the screen periphery because of the suction current are moved in the direction of the screen tip in a manner similar to what is achieved with other vibratory screens.' In this way clogging of the suction zone is prevented.
A further object o~ the vibrations is to mix pressurised water and mud thoroughly. The vertical plates which are provided also serve to transmit vibrations effecti~ely into the sea bottom.
' ' !` t- ff~ .,; t, r~ ;, r ' ~ f f ~ r; ~
`
,~ ~
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The invention relates to a conveying apparatus for the conveying of mud, more particularly ore mud, from great depths with a conveying pipe ending in a suction mouthpiece and provided with a conveying pump~
A conveying apparatus of similar type is kno~m which omprises a conveying pipe whose lower end is guided in a in such a manner as to be cylinder to be mobile andLsealed peripherally. A drive device is engaged between the cylinder on the one hand and the lower end of the conveying pipe on the other hand and moves the two parts to and fro relatively to one ano-ther. The cylinder is provided with one or more in~ardly opening non-return valves and the conveying pipe with an upwardly opening non-return valve.
It is also known to construct the hydraulic drive such that it æçrves not only for producing the pump motion but also for produoing high-frequency shaking vibrations. The lower end of the cylinder is conically shaped and terminates in a pointed tip. In the latter there are situated inwardly opening non-return valves~ which are shielded by protective ~ .
'. ' ' ~i24753 grids. The cylinder is provided with supporting feet which are distributed about its periphery. The cylinder or conveying pipe can be provided with a buoyancy body ~hich is adjustable as regards its specific gravity. The shaking movements are intended to assist penetration into the mud and to prevent the formation of channels which might possibly extend through the mud as far as the brine layer (German laid-oFen specification 2707899).
The inventi~like the state o~ the art which has been described has as its object to provide a conveying apparatus for muds with which it is possible to convey even muds of hi~h viscosity over relatively iong dist&nces or under rela-tively high conveying pressures. The conveying apparatus is also to be capable of being used to convey muds at relatively high temperatures. The temperatures of the muds being conveyed may amount to up to about 80. The muds may have a specific gravity of 1.3 g/cm . But muds of higher or lower specific gravity may also be con~eyed with the apparatus proposed by the present invention. The apparatus according to the present invention is also intended more particularly to serve to convey ore-bearing muds from great depths, with a brine zone of a relatively high specific gravity of for example 1.2 g/om3 lying above the ore mud bed. The conveying apparatus i8 to be made sùch that brine from this zone cannot get into the ore mud to be conveyed, or into the conveying apparatus. The ore muds to be conveyed may lie at a depth of about 2,500 m on~the sea floor and have a thickness of about 20 to 100 m. The viscosity of the mud can amount to about 120 c poises.
The ore mud is in a relatively firm layer or deposit ~
which may have thixotropic properties. The substance to be conveyed may be mixed with relatively large lumps such as for example lumps of basalt. The deposits may be covered with a roughly 200m thick layer of concentrated brine. The invention has the further object, as compared with the previously described state of the art, of obviating these difficulties which occur in conveying work.
According to the apparatus of the present invention which is adapted for conveying mud, such as ore mud from ocean depths, there is provided a conveying pipe having a conveying pump and terminating in a suction head, the suction head including a vibrating screen of conical configuration defining a downwardly directed tip, the direction of vibration being vertical.
The apparatus according to the invention has the advantage that the material at the bottom is loosened up by the vibrations, and thus the suction work is considerably facilitated, or the energy required reduced. The screen keeps away all obstacles which might endanger a conveying apparatus equipped with for ; example a centrifugal pump. The brine lying above the deposit is also not sucked-in.
According to a specific embodiment of the invention, the lower end of the conveying apparatus may be provided with pressurized water nozzles. Thus, a plurality of pressurized water nozzles can be situated above the screen on the conveying apparatus. The water jet is directed preferably in the direction of the screen region, or the outer surface of the ,, ' ' ~ `
~i247~3 said screen. It is also possible to arrange pressurized water nozzles in the tip region of the conical screen, these being situated on a holder which extends through the scr,een in the longitudinal direction and is arranged on the conveying apparatus.
The additional application of water under pressure contributes tc the loosening-up of the bottom material. The application of water under pressure allows a controllable dilution and thorough mixing of the loosened-up material.
The apparatus according to the invention can be constructed in various ways. In a simple constructional arrangement of one embodiment of the invention, the conical screen is secured at its ba~e on a supporting device which is guided with play on or in the lower end of the conveying pipe and is mounted to be capable of vibrating in the vertical ,~ . , direction. The lower end of the conveying pipe (suction head) can carry the drive of the vibrating screen. The screen or the supporting ring thereof can be provided with a plurality of connecting bolts which are guided in the vibration direction and are provided at their other end with running rollers bearing on a rotating annular disc which surrounds the conveying pipe and whose surface is provided with undulatory projections and depressions in the vertical direction.
The connecting bolts can carry clamping springs which bear at one end on the base of the vibrating screen and at the other end on an abutment provided on the conveying pipe.
A preload is produced by this arrangement which presses the rollers always against the annular disc.
tm/ ~ -4-~i24753 In the rotation of the cam disc the vibrating screen is moved up and do~n in accordance ~ith the speed of rotation at an adjustable rate of vibration. When the lower end of object the screen disconnects automatically the screen abuts against an L from the vibrating apparatus, so that the driving disc freevrheels.
~ or further protection of the drive a centrifugal clutch can be arranged between the said drive and the annular disc.
In a simple constructional form the annular disc is mounted in self-aligning bearings.
Conveniently the electrical drive is arranged in a special housing (drive support) surrounding the lower end of the conveying pipe, the connecting bolts being taken through to the exterior through water-tight joints. The water-tight sealing arrangement can comprise diaphragm discs which are secured on the connectlng bolts and are held peripherally in the housing. r~he housing can be provided with an oil filling and connected by way of a conduit v~ith a compensation vessel.
The screen can be formed of trapezoidal wires. To guide it, the vibrating screen can carry vertically situated guide plate~ at its external surface.
The suotion head oan be secured on a suction head shank - comprising two concentric pipes the internal of which is the suction pipe, the intervening space being used for the conveying o~ pressurised water. The suction head shank can - - comprise a plurality of pipe lengths, the inner pipes being connected to one another by means of plug and socket joints ___ .. _ _ .. , .. , .. . . . -- -- -- -- .
:~, 7~3 of the pipe lengths with O-ring sealing elements. The outer pipes/on the other hand can be provided vlith other flanges and sealing elements for connection with one another.
~ he suction head, or suction head shank, can be connected by means of a springdamping part to the line of piping leading to the surface. This keeps vibrations away rom the conveying conduit. ~he spring damping part can travel also be provided with aLdistance pickup wh~reby excessive movements of the suction head relatively to the adjoining conveying pipe are indicated. In this way it is possible to monitor in a simple manner for example whe*her the vibrating screen comes to rest on the sea floor.
The pressurised water pipe can be provided with a riser for supplying a water cooling arrangement for the drive motor.
~ he invention will be explained with reference to the constructional example shown diagrammatically in the drawings, wherein :
~ ig. 1 shows the basic construction of the apparatus according to the invention, Fig. 2 sho~s the vibrating screen and its drive in section and on a larger scale, Fig. 3 sho~ls the upper part, following on from Pig.2, Fig. 4 shows in section two pipe lengths whicn hold the suction head, Fig. 5 shows the spring damping part in side view, and :~ ~ . - ':
; .' `
,~
- ~lZ4753 Fig. 6 shows in diagram form the layout of a pressurised water installation.
From the ship A a conveying pipe B goes to the bottom of the sea. The conveying pipe fastening to the ship is not shown in detail.
A pump unit C is interposed in the conveying pipe B, and includes on the one hand the suction pump D and on the other hand the delivery pump E which is supplied with the surrounding sea water.
Secured to the lower portion of the conveying pipe 3 is the suction head shank G, this being secured by means of a spring damping part ~. This shank comprises a plurality of pipe lengths each of which comprise an inner pipe H and an outer pipe I. The inner pipe H s~rves as a suction pipe.
; The intermediate space bet-Yeen the pipes H and I is used for the conveying of water under pressure and is connected via a flexible conduit K to the pressurised water pump E.
The suction head ~ is secured to the lower end of the suction head shank G.
Secured to the lower end of the suction head is the vibrating screen 1, ~hich is of conical shape and at its base is connected to a supporting rin~ 2. ~he screen can be of frame-type construction for reasons of strength. Between the closed tip la and the apertures for the pressurised water application and the supporting ring there are situated at the - periphery three webs 3 between which the individual s&reen segmants ; , '~ ~ , .
~.
1~A753 are welded-in. The screens can have a mesh ~idth of 10 mm.
To obviate blockages, they are made from trapezoidal individual ~ires. Over the three screen segments there are secured guide plates 4 which are conveniently connected on the one hand to the tip and on the other hand to the supporting ring 2.
The supporting ring 2 carries at its periphery three ver-tically guided connecting bolts 5 ~hich are guided within the drive support 6.
~ he drive elements are arranged in the space between the suction pipe H and the protective casing M. There there is secured a submersible motor 7 the axis of which is situated parallel to the suction pipe H and which by way of a pinion 8 drives the annular disc 9, mounted with self-aligning roller bearings, through the agensy of a toothed ring 9a connected with the said disc. This is provided at its upper side with three undulatory projections with identically shaped sine wave form, on which running rollers lOa run, said rollers being secured on a drive ring 10 which connects ~ith one another the upper ends of the connecting bolts 5 Continual bearing contaot of the rollers on the annular disc is ensured by springs 11 which permanently preload the connecting bolts 5 and during nor~al operation prevent the rollers from lifting off. ~hus the rotational movement of the annular disc produces a vibrating movement in the screens.
If the springs are subjected to load - e.g. by undesirably hard impact of the screen on the sea bottom - the running rollers are lifted off, and the annular disc runs ~reèly.
` ~1~17~;3 ~he connecting boltsLare guided in plain bearing sleeves 12.
The annular space of the drive support, which is completely filled with oil, is connected with a compensation tank or vessel 13 for pressure balancing purposes.
For further protection of the drive of the annular disc, a centrifugal clutch 14 is built in between drive motor and drive pinion.
To seal the connecting bolts the latter are provided with rubber diaphragmq 18 which are fiY.ed at their external re~ions in the housing.
~ he oil is used both for lubricatin~ the movable parts and also for temperature exchange between the electric motor and the environment.
In the vicinity of the suction mouthpiece aperture there are secured on the suction head nozzles 15 which are connected by a ring main 15a with one another and with the pressurised water chamber. There is also arranged within the screen 1 a stationary nozzle holder 16 on the endq of which there are secured nozzles 16a which are also supplied from the pressurised water chamber and extend through the tip la of the vibrating screen. ~he nozzles of the outer ring are arranged in groups with different jet directions. The pressurised water is used for removing obstacles and for loosening-up the bottom. ~y modifying the total free outlet cross-section, by interchanging considerable nozzle inserts or by ~he closing of some nozzles, a~umber of - possible operating states can be achieved.
The suction head co=prises a support unit 21 Y~hich holds : , ~
~12~$753 surrounds the screen, the apparatus during assembly,Land is also used for protecting the apparatus when it descends against relatively large lumps of rock or the like.
The spring damping part ~ provides co~pensation for vibrations which may be transmitted from the vibrating creen to the drive support and the shank. At this region with it is possible to measure the pressureLwhich the apparatus presses against the ground or the force required for drawing the apparatus out of the mud, with the use of an inductive travel pickup 22. Length variations of the conveying pipe can be taken up within the spring dampin~ part by means of a steel compensator.
- The water under pressure required for the suction screen is produced by a pressurised water pump 31 which runs on the same shaft as the freouency-regulated main pump. Since a coupling of this kind is disadvantageous for the winning operation, re~lation of throughflo-v is effected by Deans of a flow control~'er32. The design of the pressurised water pump ensures that the nominal delivery or conveying rates are achieved even with the lo~est main pump rotational speed.
Th~ control piston of the flowcontr~er is moved with an electrically operated 4/3way val~e 33. The water under `
pressure is used as working medium for the flow controller and the 4/3 way valve. The quantity of water under pressure is measured with a standard venturi noz~le 34 and a capacitive differelltial pressure pickup 35. ~or venting the control lines during descent, two non-return valves 36 and 37 preceded by .
' ~ :
.
1~7~3 filters are provided.
From the pump unit which is situated at a water depth of approximately 2000 m the ~later under pressure is conducted to the suction screen, which is 200 m deep, with a rubber fabric flexible pipe 38.
~ qithin the suction head a part-~low o~ the pressurised water is used for cooling the motor 7. A fixedly set differential pressure valve 39 connected in parallel opens when a quantity greater than is required for cooling flows through, and thus limits ths pressure loss in the cooling device. After the valve the pressure water branches to the two nozzle arrangements over the screen 1 and in the screen tip la.
The vibration of the screen in conjunction with its conical shape contributes to ensuring that obstacles which come to the screen periphery because of the suction current are moved in the direction of the screen tip in a manner similar to what is achieved with other vibratory screens.' In this way clogging of the suction zone is prevented.
A further object o~ the vibrations is to mix pressurised water and mud thoroughly. The vertical plates which are provided also serve to transmit vibrations effecti~ely into the sea bottom.
' ' !` t- ff~ .,; t, r~ ;, r ' ~ f f ~ r; ~
`
,~ ~
Claims (21)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An apparatus for conveying mud, such as ore mud from ocean depths, said apparatus comprising a conveying pipe having a conveying pump and terminating in a suction head, said suction head including a vibrating screen of conical configuration defining a downwardly directed tip, the direction of vibration being vertical.
2. Apparatus according to claim 1, characterized in that the lower end of the conveying apparatus comprises pres-surized water nozzles.
3. Apparatus according to claim 1, characterized in that above the screen a plurality of pressurized water nozzles are situated at the conveying pipe.
4. Apparatus according to claim 3, characterized in that a stream of water is directed in the direction of the region of the screen or the outer surface thereof.
5. Apparatus according to claims 1, 2 or 3, characterized in that in the region of the tip of the conical screen there are arranged pressurized water nozzles arranged on a holder which is arranged on the apparatus and extends longitudinally through the screen.
6. Apparatus according to claims 1, 2 or 3, characterized in that the conical screen is secured at the base thereof in a supporting ring which is mounted to be capable of vibrating in the vertical direction and is guided with play on the lower end of the conveying pipe.
7. Conveying apparatus according to claim 1, characterized in that a lower end of the conveying pipe carries a drive for the vibrating screen.
8. Apparatus according to claim 7, characterized in that the screen and a supporting ring thereof are provided with a plurality of connecting bolts which are guided in the vibration direction, and are provided at their other end with running rollers bearing on a rotating annular disc which surrounds the conveying pipe and whose surface is provided with undulatory projections and recesses in the vertical direction.
9. Apparatus according to claim 8,characterized in that the connecting bolts comprise clamping springs which bear at one end against a base of the vibrating screen and at the other end against an abutment which is arranged on the conveying pipe.
10. Apparatus according to claim 8, characterized in that the annular disc is mounted in self-aligning bearings.
11. Apparatus according to claims 8, 9 or 10, characterized in that between said drive is electrical and between said drive the annular disc there is arranged a centrifugal clutch.
12. Apparatus according to claim 9,characterized in that the drive is electrical and is arranged in a special housing surrounding the lower end of the conveying pipe, the connecting bolts being taken to the outside through water-tight joints.
13. Apparatus according to claim 12, characterized in that the water-tight joints for the connecting bolts comprises diaphragm discs which are secured on said bolts and are held peripherally in the housing.
14. Apparatus according to claims 12 or 13, characterized in that the housing is provided with an oil filling and is connected by way of a conduit with a compensation tank.
15. Apparatus according to claims 1, 2 or 3, characterized in that the screen is formed of trapezoidal wires.
16. Apparatus according to claims 1, 2 or 3, characterized in that the screen comprises at its outside laterally disposed guide plates.
17. Apparatus according to claim 1, characterized in that the suction head is secured to a suction head shank which consists of two concentric pipes an inner one of which is the suction pipe, and an intermediate space therebetween serves for the conveying of water under pressure.
18. Apparatus according to claim 17, characterized in that the suction head shank comprises a plurality of lengths of piping, the inner pipes being connected to one another by means of plug and socket connections with O-ring sealing elements.
19. Apparatus according to claim 17, characterized in that the suction head or suction head shank is connected by way of a spring damping part to the conveying pipe leading to the surface.
20. Apparatus according to claim 19, characterized in that the spring damping part is provided with a travel pickup.
21. Conveying apparatus according to claims 2, 3 or 4, characterized in that a pressurized water conduit is provided for said water nozzles, and includes a secondary conduit for the supplying of a water cooling arrangement for the drive motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782841203 DE2841203A1 (en) | 1978-09-22 | 1978-09-22 | CONVEYING DEVICE FOR CONVEYING SLUDGE, ESPECIALLY ORE SLUDGE, FROM GREAT DEPTHS |
| DEP2841203.5 | 1978-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1124753A true CA1124753A (en) | 1982-06-01 |
Family
ID=6050094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA336,096A Expired CA1124753A (en) | 1978-09-22 | 1979-09-21 | Conveying apparatus for the conveying of mud from great depths, more especially ore mud |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5598595A (en) |
| BE (1) | BE878919A (en) |
| CA (1) | CA1124753A (en) |
| DE (1) | DE2841203A1 (en) |
| ES (1) | ES484278A1 (en) |
| FR (1) | FR2453949A1 (en) |
| GB (1) | GB2034787B (en) |
| IT (1) | IT1165995B (en) |
| NL (1) | NL7906997A (en) |
| NO (1) | NO793028L (en) |
| SE (1) | SE7907835L (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2942303C2 (en) * | 1979-10-19 | 1985-01-10 | Preussag Ag, 3000 Hannover Und 1000 Berlin | Process for the removal of mud-like marine sediments from the deep sea by means of a freely suspended suction pipe and arrangement for carrying out the process |
| FR2518639A1 (en) * | 1981-12-21 | 1983-06-24 | Inst Francais Du Petrole | PROCESS FOR RECOVERING POLYMETALLIC COMPOUNDS REJECTED BY AN UNDERWATER HYDROTHERMAL SOURCE AND DEVICES FOR IMPLEMENTING THE SAME |
| NL9200846A (en) * | 1992-05-14 | 1993-12-01 | Oord Acz B V Van | DEVICE FOR UNDERWATERING OF LANDFILLING MATERIAL. |
| GB0525878D0 (en) * | 2005-12-21 | 2006-02-01 | Rwe Nukem Ltd | Sludge removal |
| DK2626473T3 (en) * | 2012-02-09 | 2017-03-06 | Jan De Nul N V | Method of reducing the transfer of vibration to a mud suction vessel produced by a cutting head, and mud suction vessel to which such a method is used |
| ITGE20130002A1 (en) * | 2013-01-08 | 2014-07-09 | Prof Ing Cesare Saccani | PLANT FOR THE EXCAVATION OF SANDBLASTED, ICE-FISHING AND / OR SLUDGE BONDS AS A MARINE OR SIMILAR SUNDAYS. |
| JP6296936B2 (en) * | 2014-07-31 | 2018-03-20 | 東亜建設工業株式会社 | Firewood system |
| CN114370607A (en) * | 2022-01-07 | 2022-04-19 | 湘潭大学 | Mortar conveying pressure regulating system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR862724A (en) * | 1939-12-09 | 1941-03-13 | Improvements made to hydraulic devices for the extraction by hydro-suction force of sands and gold alluviums located deep in rivers and marshes | |
| US2774565A (en) * | 1951-03-13 | 1956-12-18 | Vaillant Joh Kg | Valve for gas water heaters |
| FR1069453A (en) * | 1952-01-21 | 1954-07-08 | Maschf Augsburg Nuernberg Ag | Method and device for loosening or clearing and transporting or extracting solids |
| DE2128930A1 (en) * | 1971-06-11 | 1973-01-04 | Eugen Soeding | DEVICE FOR CONTINUOUS SUCTION AND THICKENING OF A SUSPENSION OR DISPERSION |
| DE2256627A1 (en) * | 1972-11-17 | 1974-05-22 | Held & Francke Bau Ag | METHOD FOR MIXING SLUDGE MEDIA WITH WATER AND TRANSPORTING SUCH MIXTURES AND DEVICE FOR CARRYING OUT SUCH METHODS |
| US4058914A (en) * | 1975-12-15 | 1977-11-22 | Kiss Sandor G | Alternate flow suction dredge |
| DE2707899C2 (en) * | 1977-02-24 | 1983-01-13 | O & K Orenstein & Koppel AG Werk Lübeck, 2400 Lübeck | Conveyor device for conveying ore sludge |
-
1978
- 1978-09-22 DE DE19782841203 patent/DE2841203A1/en not_active Withdrawn
-
1979
- 1979-09-19 ES ES484278A patent/ES484278A1/en not_active Expired
- 1979-09-20 NL NL7906997A patent/NL7906997A/en not_active Application Discontinuation
- 1979-09-21 BE BE0/197251A patent/BE878919A/en unknown
- 1979-09-21 FR FR7923543A patent/FR2453949A1/en active Pending
- 1979-09-21 CA CA336,096A patent/CA1124753A/en not_active Expired
- 1979-09-21 JP JP12092379A patent/JPS5598595A/en active Pending
- 1979-09-21 IT IT09540/79A patent/IT1165995B/en active
- 1979-09-21 SE SE7907835A patent/SE7907835L/en not_active Application Discontinuation
- 1979-09-21 NO NO793028A patent/NO793028L/en unknown
- 1979-09-24 GB GB7932978A patent/GB2034787B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO793028L (en) | 1980-03-25 |
| GB2034787B (en) | 1983-01-06 |
| NL7906997A (en) | 1980-03-25 |
| SE7907835L (en) | 1980-03-23 |
| IT1165995B (en) | 1987-04-29 |
| FR2453949A1 (en) | 1980-11-07 |
| GB2034787A (en) | 1980-06-11 |
| BE878919A (en) | 1980-01-16 |
| DE2841203A1 (en) | 1980-04-03 |
| JPS5598595A (en) | 1980-07-26 |
| ES484278A1 (en) | 1980-05-16 |
| IT7909540A0 (en) | 1979-09-21 |
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| MKEX | Expiry |