EP0242279A1 - Verfahren und Vorrichtung zum pneumatischen Schnee-Transport - Google Patents
Verfahren und Vorrichtung zum pneumatischen Schnee-Transport Download PDFInfo
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title description 2
- 238000005070 sampling Methods 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 230000033001 locomotion Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000000750 progressive effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 210000000056 organ Anatomy 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 3
- 230000009347 mechanical transmission Effects 0.000 description 3
- 241000909536 Gobiesocidae Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
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.
Landscapes
- 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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8605339A FR2597131B1 (fr) | 1986-04-15 | 1986-04-15 | Procede et dispositif de transport pneumatique de la neige |
FR8605339 | 1986-04-15 |
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)
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)
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)
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)
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 |
-
1986
- 1986-04-15 FR FR8605339A patent/FR2597131B1/fr not_active Expired
-
1987
- 1987-04-08 US US07/035,765 patent/US4798012A/en not_active Expired - Fee Related
- 1987-04-09 EP EP87400795A patent/EP0242279A1/de not_active Withdrawn
- 1987-04-15 JP JP62091098A patent/JPH0726373B2/ja not_active Expired - Lifetime
Patent Citations (4)
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)
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 |
---|---|
US4798012A (en) | 1989-01-17 |
FR2597131A1 (fr) | 1987-10-16 |
JPH0726373B2 (ja) | 1995-03-22 |
FR2597131B1 (fr) | 1988-06-24 |
JPS63507A (ja) | 1988-01-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE ES FR IT LI |
|
17P | Request for examination filed |
Effective date: 19880407 |
|
17Q | First examination report despatched |
Effective date: 19890919 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19900330 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: PASQUIER, ARMAND |