EP3491313A1 - Apparatus for drying aggregates, such as sand and the like, with specific application to flows for submerged arc process and/or and electroslag weldings - Google Patents
Apparatus for drying aggregates, such as sand and the like, with specific application to flows for submerged arc process and/or and electroslag weldingsInfo
- Publication number
- EP3491313A1 EP3491313A1 EP17765267.4A EP17765267A EP3491313A1 EP 3491313 A1 EP3491313 A1 EP 3491313A1 EP 17765267 A EP17765267 A EP 17765267A EP 3491313 A1 EP3491313 A1 EP 3491313A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aggregates
- drying
- unit
- drying drum
- storage
- 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
Links
- 238000001035 drying Methods 0.000 title claims abstract description 85
- 239000004576 sand Substances 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 title description 10
- 238000000034 method Methods 0.000 title description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 230000005484 gravity Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/026—Arrangements for charging or discharging the materials to be dried, e.g. discharging by reversing drum rotation, using spiral-type inserts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
- F26B11/0445—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having conductive heating arrangements, e.g. heated drum wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/14—Sand
Definitions
- Apparatus for drying aggregates such as sand and the like, with specific application to flows for submerged arc process and/or and electroslag weldings.
- the present invention relates to an apparatus for drying aggregates, such as sand and the like, with specific application to flows for submerged arc process and/or and electroslag weldings.
- the invention concerns an apparatus or oven, specially designed and manufactured for drying the flow to be used in welding, on various types of metal materials such as cast iron, copper alloys, nickel, steel and the like, but that can be used whenever it is necessary to use sand and/or flows with a high degree of drying (in the order of a few units of ml/100g).
- Ovens are available in the market capable of drying inert materials, in particular sand and/or flow, intended for the purpose above. However, said ovens are not always able to dry the flow in an optimal way.
- Another object of the present invention is to propose a drying apparatus capable of optimally drying the flow, eliminating the moisture contained therein. Another object of the invention is to allow the flow to be dried rapidly and efficiently as well as to propose an apparatus capable of keeping the flow dry and dosing the quantities required so that it can be positioned in an automated plant.
- an apparatus for drying aggregates such as sand and/or the like, comprising a loading unit, for loading aggregates to be dried, a drying unit, for drying said aggregates loaded in said loading unit, and a storage and offload unit, arranged to draw said dried aggregates from said drying unit and offload the same, characterized in that said drying unit comprises a drying drum, having an internal volume, in which said aggregates to be dried are collected, mixing members of said aggregates contained in said drying drum, and heating means, for heating said internal volume of said drying drum.
- said mixing members could comprise a screw, arranged inside said drying drum, to transport and to mix said aggregates contained in said drying drum.
- said screw could have a spiral shape.
- said drying drum could be rotating.
- said drying drum could have a cylindrical shape, which symmetry and rotation axis is arranged substantially in a horizontal position.
- said heating means could comprise a plurality of drying elements arranged in close proximity to the external surface of said drying drum.
- said storage and offload unit could comprise a storage hopper, in which the aggregate dried by said drying drum are contained, and heating resistors for heating said aggregates contained in said storage hopper.
- said storage and offload unit could comprise an elevator member, such as a paddle wheel or the like, adapted to draw from said drying drum a predefined amount of said aggregates, a transfer screw, arranged above said drying drum, arranged to receive said aggregates from said elevator member, a cylinder, within which said transfer screw is arranged, having one or more openings on the side surface, arranged in correspondence with said storage hopper, through said one or more openings said dried aggregates falling by gravity in said storage hopper.
- an elevator member such as a paddle wheel or the like, adapted to draw from said drying drum a predefined amount of said aggregates
- a transfer screw arranged above said drying drum, arranged to receive said aggregates from said elevator member
- a cylinder within which said transfer screw is arranged, having one or more openings on the side surface, arranged in correspondence with said storage hopper, through said one or more openings said dried aggregates falling by gravity in said storage hopper.
- said storage and offload unit could comprise a discharge valve, for expelling a predetermined quantity of said aggregates from said hopper storage.
- said loading unit could comprise a loading hopper for loading the aggregates to be dried.
- said apparatus could comprise a suction unit, for transferring said aggregates from said loading unit to said drying unit.
- said suction unit could comprise an aspirator, a suction pipe connected between said loading unit and said aspirator, and an outlet pipe, connected between said aspirator and said drying drum.
- said aspirator could comprise means for the control of the level of the aggregates contained in said aspirator and said suction means could comprise a metering valve, arranged along said outlet duct, for determining the amount of aggregates to be transferred to said drying unit.
- said apparatus could comprise a container having a front opening with a respective door for the access to said loading unit, and a compartment, arranged in correspondence with said storage and offload unit.
- figure 1 shows a first see-through perspective view of an apparatus for drying flows according to the invention
- figure 2 shows a second see-through perspective view of an apparatus according to figure 1 ;
- figure 3 shows a see-through side view of an apparatus according to figure 1 ;
- figure 4 shows a view along A-A section line of the apparatus according to figure 1.
- Said apparatus 1 essentially comprises a container 2, in which a loading unit 3, an intake unit 4, a drying unit 5 and a storage an offload unit 6 are contained.
- said container 2 has an opening 21 at the front with a relative door 22.
- said container 2 also has behind a compartment 23, which operation will be better defined below.
- Said container 2 also includes a touch on screen type digital control panel 24', for controlling the operation of the apparatus 1 , and a pushbutton 24", where there are an unload product button, an emergency mushroom and a RFID technology detection station.
- said container 2 also includes wheels 25 to allow the displacement of said apparatus 1.
- Said loading unit 3 comprises a loading hopper 31 driven by pneumatic actuators 32.
- the loading hopper 31 is accessible by opening the door 22 so that the sand or inert material to be dried can be manually loaded therein.
- Said suction unit 4 comprises an aspirator 41 , located in the upper portion of said apparatus 1 , a suction pipe 42 (shown in figure 4), connected between said loading hopper 31 and said aspirator 41 , and an outlet pipe 43.
- Said aspirator 41 also includes means for controlling the level 411 of the flow contained therein, which in the embodiment of the present invention comprise a bar 412 and a detection member 413, such that when the flow in said aspirator 41 exceeds a predetermined level, said flow contacts with said detection member 413, causing the rotation of said bar 412 to stop, blocking the aspirator 41.
- Any other flow level detection systems may be implemented as an alternative to the described one.
- Said suction unit 4 also includes a metering valve 44, arranged along said outlet pipe 43, for measuring the flow to be sent to the drying unit 5.
- the drying unit 5 includes a drying drum or roller 51 having a cylindrical shape, such as to define an internal volume V, with the symmetry and rotation axis of the cylinder arranged horizontally.
- Said drying drum 51 is internally provided with a spiral screw 52, as a mixing member. Drying resistances are provided on the outer surface 53.
- a unload flange 54 of the dried sand or inert, i.e. completely dehydrated, is provided.
- Said drum 51 is rotated by means of motors 7, comprising an electric motor 71 and motions and return transmissions members 72 including sprocket and chain systems.
- Said outlet pipe 43 outgoing from said aspirator 41 is input connected to said drying drum 51.
- Said storage and offload unit 6 comprises a rotating elevator member 61 , which in this embodiment is a paddle wheel, capable of getting from said drum 51 predetermined drying quantities that pass through said unload flange 54.
- Said rotating elevator member 61 always rotating by means of said motor means 7, transports the flow taken from said drying drum 51 into an unload hopper 62, which then transfers it into a transfer screw 63, which has a spiral shape, arranged within a cylinder 64, contained within a containment box 64'.
- Said cylinder 64 has openings 65 on the surface, which in this embodiment are 4, through which appropriate flow quantities may pass, reaching, by fall, a storage hopper 66, arranged at the bottom, provided with resistors 67.
- Said storage hopper 66 is arranged in correspondence with said compartment 23 for transferring the already dried flow. Downstream said storage hopper 66 a discharge valve 68 is provided positioned in correspondence with said compartment 23 for discharging, if necessary, a suitable amount of sand or inert material.
- the sand or the inert material to be dried is loaded manually by said loading hopper 31 , by operating said pneumatic actuators 32.
- the aspirator 41 draws the flow from said loading hopper 31 , through said suction pipe 42.
- the metering valve 44 determines the amount of flow contained within said aspirator 41 to be transferred to said drying drum 51 through said outlet pipe 43.
- the means for controlling the level 411 block the suction from said loading hopper 31.
- the drying drum 51 rotates by passing the flow through the screw 52.
- the drying resistors 53 heat the flow contained within the inner volume V of said drying drum 51 to a temperature of about 350 °C, thereby eliminating any moisture component.
- the sand, now dried, is transported by said transfer screw 63 and passed through said openings 65.
- Said sand, by fall, is collected in said storage hopper 66 and kept at a temperature of 120 °C by said resistors 67, thereby preventing it to absorb again any moisture for any reason.
- the apparatus for drying inert materials 1 comprises load cells arranged so as to maintain the control of the amount of flow contained within said drying drum 51 and within said storage hopper 66.
- the apparatus for drying inert materials 1 can be inserted into a complex plant.
- the output of said discharge valve 68 may be provided with a flow pusher for transferring the dried flow and its use, everything monitored and operated by an RFID data transfer system.
- An advantage of the drying apparatus according to the present invention is to allow a quick drying of the flow or inert in general, allowing it to be maintained and dehydrated over time.
- An additional advantage of the drying apparatus according to the present invention is to allow an optimum dosage of the dried flow.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102016000078894A IT201600078894A1 (en) | 2016-07-27 | 2016-07-27 | Apparatus for drying aggregates, such as sand and the like, with specific application for fluxes for welding carried out with a submerged and / or electric arc process. |
PCT/IT2017/000141 WO2018020523A1 (en) | 2016-07-27 | 2017-07-13 | Apparatus for drying aggregates, such as sand and the like, with specific application to flows for submerged arc process and/or and electroslag weldings |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3491313A1 true EP3491313A1 (en) | 2019-06-05 |
EP3491313B1 EP3491313B1 (en) | 2020-09-02 |
Family
ID=57610189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17765267.4A Active EP3491313B1 (en) | 2016-07-27 | 2017-07-13 | Apparatus for drying aggregates such as sand |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3491313B1 (en) |
IT (1) | IT201600078894A1 (en) |
WO (1) | WO2018020523A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113587585A (en) * | 2021-08-06 | 2021-11-02 | 郑州市同鼎机械设备有限公司 | Sand drying machine with polygonal inner cylinder and middle cylinder |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110425844B (en) * | 2019-06-22 | 2021-09-17 | 中建深业建设发展有限公司 | Grit drying device for building field |
CN113532057B (en) * | 2021-06-04 | 2022-08-09 | 信丰茂旺源生态农业有限公司 | Drying-machine is used in domestic fungus processing |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB136379A (en) * | 1919-02-17 | 1919-12-18 | Alfred Percy Digger | Improvements in Appliances for Drying Sand for Foundry or other Purposes. |
US1882405A (en) * | 1931-06-11 | 1932-10-11 | Claud H Burris | Four-in-one steam cylinder drier |
NL135538C (en) * | 1966-01-31 | |||
US3661365A (en) * | 1970-11-30 | 1972-05-09 | Bonsal Co W R | Apparatus for proportioning dry particulate materials |
US3938785A (en) * | 1972-06-10 | 1976-02-17 | Heise Carl Hermann | Method and apparatus for manufacturing a coating mass for road constructions |
NL8105313A (en) * | 1981-11-24 | 1983-06-16 | Bocol B V | Rotary horizontal drum producing hot asphalt mixt. - from old road surfacing material, has helical heating gas passage on inner drum wall |
JP3347963B2 (en) * | 1996-12-11 | 2002-11-20 | 株式会社松本機械製作所 | Vacuum rotary dryer |
JP5544174B2 (en) * | 2010-01-05 | 2014-07-09 | 新日鐵住金株式会社 | Flux reuse device and flux reuse method |
-
2016
- 2016-07-27 IT IT102016000078894A patent/IT201600078894A1/en unknown
-
2017
- 2017-07-13 EP EP17765267.4A patent/EP3491313B1/en active Active
- 2017-07-13 WO PCT/IT2017/000141 patent/WO2018020523A1/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113587585A (en) * | 2021-08-06 | 2021-11-02 | 郑州市同鼎机械设备有限公司 | Sand drying machine with polygonal inner cylinder and middle cylinder |
Also Published As
Publication number | Publication date |
---|---|
IT201600078894A1 (en) | 2018-01-27 |
EP3491313B1 (en) | 2020-09-02 |
WO2018020523A1 (en) | 2018-02-01 |
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