EP0242279A1 - Verfahren und Vorrichtung zum pneumatischen Schnee-Transport - Google Patents

Verfahren und Vorrichtung zum pneumatischen Schnee-Transport Download PDF

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Publication number
EP0242279A1
EP0242279A1 EP87400795A EP87400795A EP0242279A1 EP 0242279 A1 EP0242279 A1 EP 0242279A1 EP 87400795 A EP87400795 A EP 87400795A EP 87400795 A EP87400795 A EP 87400795A EP 0242279 A1 EP0242279 A1 EP 0242279A1
Authority
EP
European Patent Office
Prior art keywords
snow
conveying
removal
injection
members
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.)
Withdrawn
Application number
EP87400795A
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English (en)
French (fr)
Inventor
Armand Pasquier
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.)
Etudes Techniques Et Realisations Sa Cdf Ingenierie
Pasquier Armand Rene
ETUDES TECHNIQUES ET REALISATIONS CDF INGENIERIE SA
Original Assignee
Etudes Techniques Et Realisations Sa Cdf Ingenierie
Pasquier Armand Rene
ETUDES TECHNIQUES ET REALISATIONS CDF INGENIERIE SA
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 Etudes Techniques Et Realisations Sa Cdf Ingenierie, Pasquier Armand Rene, ETUDES TECHNIQUES ET REALISATIONS CDF INGENIERIE SA filed Critical Etudes Techniques Et Realisations Sa Cdf Ingenierie
Publication of EP0242279A1 publication Critical patent/EP0242279A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H4/00—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow
    • E01H4/02—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow for sporting purposes, e.g. preparation of ski trails; Construction of artificial surfacings for snow or ice sports ; Trails specially adapted for on-the-snow vehicles, e.g. devices adapted for ski-trails

Definitions

  • the present invention relates to a pneumatic method and device for transporting natural or artificial snow intended for snowmaking or snow removal or fire protection, and more particularly the conditions for removing snow.
  • the sampling device is always associated with the vehicle for delivering the heap or the snow that remains motionless.
  • the sampling member consisting of screws as described in patent FR-A-2,289,414 does not ensure a seal between the internal space of the pipe and the atmosphere where the air pressures are different ; this results in poor pneumatic efficiency due to leaks air from inside the pipe to the outside.
  • the realization implements quite complex mechanisms. It is also known that snow is a material which quickly causes stuffing phenomena and therefore blocking on the conveyor screws.
  • the sampling device consisting of a snow blower or a single or double drum turbo cutter is effective, but its use has always been envisaged by being moved over the pile or layer of snow by means of a vehicle.
  • This arrangement requires a tracked vehicle capable of moving over snow, the cost of which is high and the driving of which is made very difficult by the need to cut the snow regularly.
  • the present invention aims to remedy these drawbacks. To this end, it relates to a process and a device for pneumatically transporting snow, particularly comprising a conveying apparatus making it possible to move a pile of snow towards a sampling and lump removal member in a fixed position, a sampling member associated with an injector also fixed.
  • This method and this implementation device thus make it possible to control the thickness of the snow absorbed by the removal member as well as the conveying speed and consequently the snow flow to be introduced into the transport pipe.
  • An object of the present invention consists of a pneumatic snow transport method comprising at least one drive source driving an air generator, a snow injection member in the transport pipe producing a mixture of air and snow, the latter coming from a pick-up member, drive means for driving said injection and pick-up members linked to or independent of said drive source, characterized in that said injection and snow-picking members are in a fixed position, and in that a heap of snow is moved towards the sampling member by a conveying means according to a controlled translation speed and thickness.
  • the injection and withdrawal organs are for example respectively a rotary valve and a cutter as described in the patents cited above.
  • the snow is brought to the conveying device either by being pushed by the blade of a tamping machine, for example, or transported by a "loader" type public works machine.
  • Another object of the invention consists of a device for implementing the method comprising at least one motor source driving an air generator, at least one snow injection member associated with a transport pipe producing a mixture of air and snow, at least one removal member, drive means for driving said members linked to or independent of said drive source, characterized in that said injection and removal members are in a fixed position and in that it further comprises a conveying means displacing in translation the snow heap towards the removal member and a clipping device having the function of controlling the thickness of the snow heap reaching the removal member.
  • the means of conveying the snow mass may consist of a conveyor belt equipped with transverse spikes in order to drive the snow mass and of means for driving said conveyor belt.
  • the conveying means can also consist of transverse crampons with a view to driving the snow, sliding on a fixed floor, driven by two side chains actuated by motor means.
  • the conveying means are driven by drive means belonging to a group which includes mechanical transmissions, hydraulic transmissions, electrical transmissions and mixed transmissions.
  • the sampling drum is preferably placed tangentially to the plane of conveyance of the snow mass.
  • Said drive means provide said conveying means with a translational movement at discontinuous speed called step by step or at constant continuous speed.
  • the value of said speed is adjusted and controlled as a function of the power consumed by the sampling device, this depending on the consistency of the snow and constituting one or more setpoint values for regulation by continuous action or discontinuous.
  • the value of the maximum power not to be exceeded is measured indirectly by measuring the supply oil pressure. of the engine, the oil flow must be constant to ensure a constant speed of rotation.
  • a pressure switch activates a hydraulic solenoid valve in order, for example, to interrupt the supply to the hydraulic drive motor of the snow conveying device.
  • the pick-up device regains a normal resistive power below the set value, measured indirectly, the drive motor of the conveyor device is again supplied, putting the snow back in motion at a predetermined constant speed.
  • the speed is controlled by servo means acting "all or nothing".
  • An improvement consists in adjusting said speed of the conveying device by means of permanent regulation according to progressive and continuous values or according to discontinuous values in stages in order to maintain a constant resistance power of the picking member, by measuring for example oil pressure as described above.
  • the snow flow to be introduced into the pipe depends firstly on the width of the snow mass equal to that of the conveying device which is equal to that of the picking device, secondly on the speed of conveying the snow and thirdly the average height of the snowfall.
  • This average height is determined by a clipping device consisting of scrapers or a conveyor belt as described for the conveying device rotating in the opposite direction to that of the conveying device, placed obliquely, its base being situated at an equal height. to that determined for the pile of snow, and situated a little before the removal member while being fixed to the common frame supporting the injection, removal and conveying members, by suitable means.
  • Said height can be fixed or adjustable.
  • the speed of rotation is determined in such a way that the excess snow is discharged without creating an excessive resistance force against the advancement of the pile of snow when its conveying speed is maximum.
  • the conveying device and its drive means are fixed to a frame provided with pad (s) when it has to move on snow or on wheels, for the case in particular where it is used for snow removal from traffic lanes or places, although in this case, the use of skates is possible.
  • the injection and withdrawal organs can constitute a unit that can be used either on said frame, associated with the conveying device, or on a vehicle as described in the patents cited above.
  • the air generator is placed in a fixed or removable manner on a frame equipped with a thermal or electric motor and connected to the injection member by a flexible air duct.
  • This frame can be secured to a sledge that can either be towed on the snow, or placed on a vehicle. If the attachment is removable, the air generator can be used on this sled frame driven by said engine either in association with the assembly of injection, withdrawal and conveying members, or in association with the injection members and sampling mounted on a vehicle as described in the European patent application No. 106,731; the air generator can also be carried by the vehicle carrying the injection and sampling organs as described in the cited patents.
  • Another variant of the invention provides for a snow cutter or turbo-cutter type withdrawal member having several snow supply outlets each connected to an injection member, each connected to a pneumatic transport pipe.
  • the width of the conveying device is equal to that of the removal member.
  • Another variant provides for the possibility of associating several unitary devices one beside the other.
  • several devices associated transversely increase the conveying width as described in the previous variant while also making it possible to simultaneously supply several pipes.
  • Another variant provides for associating with the conveyor device connected to its withdrawal and injection member, one or more other conveyor devices in the longitudinal direction in order to linearly increase the stock of snow that can be conveyed according to a straight line or according to a curve segmented by each of the conveying devices.
  • a method and an apparatus are thus available which considerably improve the conditions of use for the pneumatic transport of snow by the appreciable increase in the average flow rate of snow removed, by the reduction in operating costs resulting from not immobilization of a high-power carrier vehicle, by improving the pneumatic efficiency through the use of sufficiently leaktight injectors unlike the conveying and introduction screws described in patent FR-A-2,289,414, and by simplification of use since the operator's task is simply to push or load the snow onto the conveyor device.
  • the withdrawal member 1 is in a fixed position as well as the injection member 2 of the rotary lock type and are fixed to the sledge 3.
  • the conveyor device 4 which includes the snow drive scrapers 5, fixed at their end to the two side chains 6.
  • the latter rotate around the rollers 7 at least two of which are driven by a transmission mechanical or motor 8, hydraulic in the present example.
  • the movement of the scrapers 5 which slide on the floor 14, causes the snow against the picking member 1 which delivers it and sends it to the injector 2.
  • the picking member 1 is preferably placed tangentially to the conveying floor 14.
  • the conveyor device comprises a clipping member 9 which rotates in the opposite direction to that of the scrapers 5.
  • the excess snow is discharged back onto the device drive in translating snow.
  • the clipping member 9 is made up of scrapers 10 fixed on two chains 11 driven by a mechanical transmission or by a motor 12, hydraulic in this example. It is fixed to a frame 13 secured to the sledge 3.
  • the air generator 18 is connected to the injector 2 by a flexible conduit 19.
  • the motors, hydraulic in the present example, for driving the various members are supplied by pumps driven in coupling or independently by a either thermal 20, electric or hydraulic motor.
  • the air generator 18 and their associated equipment are fixed on a sledge 21.
  • the drive speed of the scrapers 5, therefore the speed of conveying the snow, is controlled by a servo device 22 as seen in FIGS. 1 and 3.
  • This servo device receives as information the pressure of oil from the hydraulic motor 23 of the sampling member 1 through a small conduit 24.
  • the control device 22 acts on the supply to the hydraulic motor 8 of the conveyor device 4 either by stopping this supply by means of a solenoid valve for example, when said oil pressure exceeds a predetermined value, or by varying the engine power flow 8, therefore the snow driving speed, in order to maintain a constant oil pressure on the engine power 23.
  • This speed variation is a function of the consistency of the snow on which the power consumed by the motor of the sampling device 1 depends.
  • the servo-control device acts for example on the adjustment of the variable displacement of the pump d motor supply 8.
  • This control device can take into account in a complementary or independent way the pneumatic power measured, for example, by the air pressure inside the pipe.
  • a pneumatic pressure switch receives the air pressure through a small duct 25 connected to the air duct 19. This pressure switch acts by sending a control signal to the hydraulic supply of the motor 8 by all or nothing action or by discontinuous or continuous action according to known regulation techniques.
  • An alternative implementation of the method provides for the use of a withdrawal member with two or more feed outlets served by a single conveying device as seen in FIG. 4.
  • a single cutter 26 with two outlets supplies two injection members 27a and 27b connected respectively to the snow transport pipes 28a and 28b.
  • the clipping device 29 is also common.
  • another variant implementation of the method consists in associating several independent devices. This arrangement allows very flexible use of the method, in particular for distributing the sampling devices over several snow accumulation sites or on the contrary to maximize the sampling rate on a single site.
  • a complementary conveying device 30 is linearly associated with the main device.
  • This additional device 30 makes it possible to increase, as in the previous variants, the quantity of snow stored on the conveying device but without thereby increasing the rate of removal and transport. It is advantageous when the pusher machine or the loader machine has to collect snow over a large area requiring a transport time greater than the time of absorption of snow on a single conveying device.
  • This additional device 30 does not include a clipping device. Its drive is provided by a mechanical transmission or by a hydraulic motor 31 for example which is connected to a hydraulic supply circuit by hoses 32 and quick couplers 33.
  • the withdrawal and injection members can be fixed in a removable manner or not on a frame independent of that of the conveying device.
  • the two frames are placed end to end during operation so that the conveyed snow can be delivered by the picking member.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Air Transport Of Granular Materials (AREA)
EP87400795A 1986-04-15 1987-04-09 Verfahren und Vorrichtung zum pneumatischen Schnee-Transport Withdrawn EP0242279A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8605339 1986-04-15
FR8605339A FR2597131B1 (fr) 1986-04-15 1986-04-15 Procede et dispositif de transport pneumatique de la neige

Publications (1)

Publication Number Publication Date
EP0242279A1 true EP0242279A1 (de) 1987-10-21

Family

ID=9334229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400795A Withdrawn EP0242279A1 (de) 1986-04-15 1987-04-09 Verfahren und Vorrichtung zum pneumatischen Schnee-Transport

Country Status (4)

Country Link
US (1) US4798012A (de)
EP (1) EP0242279A1 (de)
JP (1) JPH0726373B2 (de)
FR (1) FR2597131B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399946A1 (de) * 1989-04-21 1990-11-28 Aluxa Ag Verfahren zur Herstellung von künstlichem Schnee

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO334886B1 (no) * 2009-01-26 2014-06-30 Ncc Construction As Anlegg og fremgangsmåte for nedsmelting og rensing av snø og is
FI128945B (en) * 2016-10-19 2021-03-31 Frozen Innovations Oy SYSTEM AND METHOD FOR MANUFACTURING SNOW STRUCTURES
KR102134262B1 (ko) * 2018-10-11 2020-07-16 한국생산기술연구원 적설 수거 이송 장치 및 이를 이용한 적설 수거 이송 방법
US11617865B2 (en) 2020-01-24 2023-04-04 Mivi Neuroscience, Inc. Suction catheter systems with designs allowing rapid clearing of clots

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1117491A (fr) * 1954-12-06 1956-05-23 Chasse-neige
FR2262155A1 (en) * 1974-02-26 1975-09-19 Leitner Spa Ski slope snow conveyor - has all parts of pump and tube in contact with snow made of plastic
DE2548338A1 (de) * 1974-10-30 1976-05-06 Tech Et Realisations E T R Dou Verfahren und vorrichtung zur schneefoerderung
EP0106731A1 (de) * 1982-09-17 1984-04-25 ETUDES TECHNIQUES ET REALISATIONs CdF INGENIERIE Einrichtung zum Transport von Schnee

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174578A (en) * 1977-05-24 1979-11-20 Bernardino Grillo Tracked snowplow
FR2422771A1 (fr) * 1978-04-10 1979-11-09 Tech Realisa Ingenieri Et Dispositif de prelevement de neige
US4288931A (en) * 1979-11-19 1981-09-15 Rhodes Glenn D Method and conveyor for snow removal
US4404762A (en) * 1982-02-08 1983-09-20 Munsterer Gerald A Ski trail resurfacing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1117491A (fr) * 1954-12-06 1956-05-23 Chasse-neige
FR2262155A1 (en) * 1974-02-26 1975-09-19 Leitner Spa Ski slope snow conveyor - has all parts of pump and tube in contact with snow made of plastic
DE2548338A1 (de) * 1974-10-30 1976-05-06 Tech Et Realisations E T R Dou Verfahren und vorrichtung zur schneefoerderung
EP0106731A1 (de) * 1982-09-17 1984-04-25 ETUDES TECHNIQUES ET REALISATIONs CdF INGENIERIE Einrichtung zum Transport von Schnee

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399946A1 (de) * 1989-04-21 1990-11-28 Aluxa Ag Verfahren zur Herstellung von künstlichem Schnee

Also Published As

Publication number Publication date
FR2597131A1 (fr) 1987-10-16
FR2597131B1 (fr) 1988-06-24
US4798012A (en) 1989-01-17
JPS63507A (ja) 1988-01-05
JPH0726373B2 (ja) 1995-03-22

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Inventor name: PASQUIER, ARMAND