CN105544886A - Automatic wind power snow removing equipment and method for sunlight greenhouse - Google Patents

Automatic wind power snow removing equipment and method for sunlight greenhouse Download PDF

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Publication number
CN105544886A
CN105544886A CN201510964830.0A CN201510964830A CN105544886A CN 105544886 A CN105544886 A CN 105544886A CN 201510964830 A CN201510964830 A CN 201510964830A CN 105544886 A CN105544886 A CN 105544886A
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China
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angle steel
blower fan
wind
treadmill
platform
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CN105544886B (en
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宋卫堂
王海钥
李枫
金崟
黄世俊
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China Agricultural University
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China Agricultural University
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04DROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/10Snow traps ; Removing snow from roofs; Snow melters
    • E04D13/106Snow removing devices
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14Greenhouses
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25Greenhouse technology, e.g. cooling systems therefor

Abstract

The invention relates to automatic wind power snow removing equipment for a sunlight greenhouse. A front angle steel rail and a back angle steel rail are erected over the back slope of the greenhouse through steel pipes and arranged along the full length of the back slope of the greenhouse, and the left ends and the right ends of the angle steel rails are provided with limit switches; after angle steel wheels are installed at the four corners of the bottom side of a movable plate, the movable plate is erected over the two angle steel rails; a bearing platform is erected over the movable plate and hinged to support rods through a left drive rotating shaft and a right drive rotating shaft, the left support rod and the right support rod are fixed to the movable plate to support the bearing platform, the back side of the bearing platform is connected with the movable plate through a telescopic spring, the front side of the bearing platform is erected on an eccentric wheel, and the eccentric wheel is connected to a synchronous motor through a rod piece; a draught fan is installed above the bearing platform and connected with the motor through a wire. The synchronous motor drives the eccentric wheel to rotate while the draught fan is driven by the movable plate to do reciprocating motion on the angle steel rails, therefore, the bearing platform drives the draught fan to swing up and down, the wind power covering area is increased, the snow removing purpose is achieved, damage to greenhouse film is greatly reduced, and the snow removing efficiency is improved.

Description

A kind of heliogreenhouse wind-force automatic snow apparatus and method for
Technical field
The invention belongs to heliogreenhouse snow removing equipment technical field, particularly a kind of heliogreenhouse wind-force automatic snow apparatus and method for.
Background technology
Heliogreenhouse is greenhouse, a kind of Yimianpu with Chinese characteristics pattern, is survive the winter and produce the Main Greenhouse pattern of gardening product in the northern area of China.Heliogreenhouse develops very swift and violent nearly ten years, defines certain industry size.A large amount of development of heliogreenhouse make northern China cities and towns winter-spring season fresh provision situation have very large change, have saved a large amount of coal resources simultaneously, have alleviated atmosphere pollution, alleviated the transport pressure of " south vegetable north transportation ", also improve land utilization ratio.Compare with glasshouse, it also has the advantages such as lightweight, easy installation and removal.
Due to northern China winter weather cold, warmhouse booth ubiquity the situation of accumulated snow pressure canopy.Roof accumulated snow one side causes very large impact to the light transmission in greenhouse and heat insulating ability, causes a large amount of energy dissipation, affects plant growth; Affect global stiffness and the intensity in greenhouse on the other hand, bring potential safety hazard.
At present, 4 kinds of conventional methods are mainly contained for greenhouse snow removing:
(1) mechanical scraper snow removing.From the operation process of snow removing, snow removing mechanism, technical method comparative maturity, but in the concrete course of work, be often subject to the restriction of the conditions such as facility surface appearance, snow thicknes, temperature height, snow removing process also easily damages greenhouse film body, thus makes its use there is a lot of limitation.
(2) chemical thaw method.General use salt or ice-snow melting agent are as Snow Agent, and snow removing effect is better.But use chemistry snow removing costly, certain pollution be also result in environment and soil.Therefore the use of this method also receives certain restriction.
(3) photo-thermal is except snow dust.Photo-thermal snow melt method is at a few row's photo-thermal of greenhouse roof arranged beneath pipe, by heat trnasfer, the snow of greenhouse roof is removed.This method energy consumption is excessive, and costly, is unfavorable for popularizing.
(4) manually except snow dust.Artificial snow removing is based on a large amount of human inputs, and normally the accumulated snow of greenhouse roof cleans and transports away by peasant, allows it naturally melt; Or the hand-held blower fan of peasant carries out blowing snow, Snow removing.The labour intensity that manually clears the snow is large, loses time, wasting manpower and material resources.
At present, be limited to technology, the many-sided reason of economic dispatch, peasant still adopts the mode of artificial snow removing mostly, so just significantly increases their labour intensity, simultaneously neither a strategy of well dealing with problems.Given this, the heliogreenhouse automatic snow apparatus and method for of actual production, stable and reliable operation simple, cheap in the urgent need to a kind of technology and equipment.
Summary of the invention
Not enough for prior art, the invention provides a kind of heliogreenhouse wind-force automatic snow apparatus and method for.
Data shows, and generally the snow motion of particle under wind action is divided into 3 classes: compactedly to move, saltation and suspended, as shown in Figure 1.Compacted moving is when the wind speed of blowing over snow source is close to critical wind velocity, and the snow particle on accumulated snow surface is moved back to and rolled and slippage forward on snow face, namely avenges particle and is moved by stable state under wind action.Saltation is the phenomenon that snow particle moves forward on snow jump limit, top, face.The height that snow particle jumps is generally between several centimetres to tens centimetres, and the thickness of saltation layer depends primarily on the particle size of wind speed size and snow particle generally.Suspended is after wind speed is more than 9m/s, and a large amount of snow grain is involved in air-flow by vortex group and runs with the wind, under DIFFUSION IN TURBULENCE effect, suspended height from several tens cm to 10m, even up to about 100m.Because design focal point of the present invention is the snowflake fallen to blow off warmhouse booth surface, then, in blower fan blowing snow process, the main movement of snow is suspended, takes second place to move and saltation for compacted.
A kind of heliogreenhouse wind-force automatic snow equipment, this equipment comprises blower fan 11, blower fan telecontrol equipment and control system;
Described blower fan telecontrol equipment comprises angle steel track 2, angle steel wheel 3, treadmill 6 and carrying platform 9, and the parallel angle steel track 2 in two, front and back is erected at greenhouse adverse grade by steel pipe 4, is positioned at insulation quilt and shutter rear, and along the elongated layout of greenhouse adverse grade; Corner, the bottom side established angle steel wheel 3 of treadmill 6, and be erected on two angle steel tracks 2 by angle steel wheel 3, carrying platform 9 is erected at the top of treadmill 6, one end of left and right drive shaft is connected to the left and right sides of carrying platform 9, the other end respectively with the upper end thereof of the pole 10 of corresponding side, the lower end of left and right pole 10 is separately fixed on treadmill 6, carrying platform 9 is supported, the rear side of carrying platform 9 is connected with treadmill 6 by coil tension spring 7, front side rides on eccentric wheel 8, and eccentric wheel 8 is connected to synchronous motor 15 by rod member; Described blower fan 11 is arranged on above carrying platform 9;
Control system comprises motor 1, synchronous motor 15 and two limit switches 14, and motor 1 is arranged on below treadmill 6, is connected with blower fan 11 by wire 5; Synchronous motor 15 is located on treadmill 6, is positioned at below carrying platform 9; Two limit switches 14 are located at the two ends, left and right of angle steel track 2 respectively.
Further, this equipment also comprises and drive shaft one or more driven spindle side by side, one or more driven spindle described is distributed in drive shaft both sides, its one end is connected on carrying platform 9, the other end is connected on connecting rod 10-1, after the other end of described drive shaft is connected with connecting rod 10-1, with the upper end thereof of pole 10.
The outlet of described blower fan 11 connects a flat air port 12, and the described trailing spigot in flat air port 12 and the outlet of blower fan 11 are connected.
Described flat air port 12 is gradual change platypelloid type, outlet director 500mm, high 10mm.
Described angle steel track 2 adopts equilateral Zinc-coated angle steel; Described angle steel wheel 3 is V-type, and surface spraying elastomeric material prevents slipping.
Windproof barb is provided with below described treadmill 6, windproof barb is parallel to angle steel track 2, and the crotch of its underpart matches with angle steel track 2 but do not contact, when there being strong wind to blow treadmill 6, windproof barb can catch on angle steel track 2, avoids strong wind to be thrown by treadmill 6.
Described carrying platform 9 is provided with assembling seat 13, three assembling seats 13 and forms triangle, and an assembling seat 13 of rear side matches with the handle of blower fan 11, and two assembling seats 13 of front side match with the shelf size of blower fan 11; Blower fan 11 is by being arranged on carrying platform 9 with the riveted joint of assembling seat 13.
The steel pipe 4 of strut angle steel track 2 is spaced, and makes angle steel track 2 horizontal arrangement, is provided with and supports with the stability strengthening steel pipe 4 between the steel pipe 4 of two, front and back.
The horizontal movement parameter designing of blower fan 11 comprises 0.2m/s, 0.5m/s, 1.0m/s tri-translational speeds.
Add slide rail below described angle steel track 2, motor wire 5 is laid on slide rail, can follow motor 1 move to make wire 5.
A kind of roofing of heliogreenhouse is made up of straightway and curved section, roofing overall width L 1=8.00m; Its interface function relation character box-like 1:
y = 5.333 · x 0 ≤ x ≤ 0.15 y = 1.618 · x 0.371 0.15 ≤ x ≤ 8.00 Formula 1
The adverse grade elevation angle is 42 °, adverse grade width L 2=1.00 ~ 1.50m, roofing and adverse grade joint are roofing peak c, be highly 3.50m, antero-lateral horn steel track 2 is set up on adverse grade, rear side angle steel track 2 is set up in adverse grade and Hou Qiang joint, get people to be positioned at the horizontal extent that footing manually sweeps away snow and to be x=2.00m to the maximum, then wind-force coverage first limit point coordinate is (2,1.6182 0.371), wind-force coverage second limit point coordinate is roofing and adverse grade joint, is (8,3.50), can obtains:
Antenna height H=4.61 ~ the 4.81m of blower fan 11;
Pendulum angle θ=44.6 of blower fan 11 ° ~ 31.4 °.
The hunting period of described blower fan 11 is chosen to be 12s, according to 44.6 ° ~ 31.4 ° spans calculating angle of oscillation speed be 5.2 °/s ~ 7.4 °/s.
Above-mentioned heliogreenhouse automatic snow equipment carries out the method removed the snow, the limit switch 14 that the motion of blower fan 11 on angle steel track 2 is equipped with a start/stop button master switch and angle steel track 2 two ends by motor 1 controls, after pressing start/stop button, motor 1 rotates forward, treadmill 6 starts forward on angle steel track 2 and runs, limit switch 14 rear motor 1 touching angle steel track 2 end when treadmill 6 reverses, drive treadmill 6 counter motion, thus realize blower fan 11 moving back and forth on angle steel track 2; Simultaneously, synchronous motor 15 drives rod member to rotate, the eccentric wheel 8 that rod member termination connects rotates thereupon, because the center of eccentric wheel 8 is not on the point of rotation, carrying platform 9 front end contacted with eccentric wheel 8 is made to produce displacement in vertical direction, namely whole carrying platform presents the oscillating motion around drive shaft, thus realizes swinging up and down of blower fan 11, increases the coverage of wind-force automatic snow; After again pressing start/stop button, equipment is out of service.
Beneficial effect of the present invention is:
1, the present invention devises brand-new wind-driven type automatic snow operating type, and scrape canopy operation and artificial hand-held blower fan snow removing than traditional machinery, which greatly reduces the damage of greenhouse film and efficiency of cleaning snow is improved; Devise self-travel type base plate, save labour; By pre-anti-fall snow, blow away accumulated snow two kinds of modes and prevent accumulated snow to press the problem of canopy from root.
2, this equipment have employed adverse grade Track desigh, takes full advantage of rear wall area, increases the usage space on road surface between canopy; The detachable flat air port of this equipment de-sign, interface is designed to tie and connects or screw anchor, is easy to assembling, dismounting, is extensively suitable for multiple blower fan type; Devise novel assembling base plate, the simple and easy riveted joint of multi-brand, polytypic blower fan can be realized, reduce device complete machine expense;
Accompanying drawing explanation
Fig. 1 is the motion morphology schematic diagram of wind and snow flowing;
Fig. 2 is heliogreenhouse roofing fitting function key diagram;
Fig. 3 is treadmill structural representation;
Fig. 4 is support platform structural representation;
Fig. 5 is flat tuyere structure schematic diagram;
Fig. 6 is the erection schematic diagram of angle steel track and steel pipe;
Fig. 7 is the schematic diagram that angle steel track and steel pipe frame are located on heliogreenhouse;
Fig. 8 is the schematic diagram of wire and slide rail;
Fig. 9 is heliogreenhouse wind-force automatic snow equipment manipulation schematic diagram.
Label declaration: 1-motor, 2-angle steel track, 3-angle steel is taken turns, 4-steel pipe, 5-wire, 6-treadmill, 7-coil tension spring, 8-eccentric wheel, 9-carrying platform, 10-pole, 10-1-connecting rod, 11-blower fan, the flat air port of 12-, 13-assembling seat, 14-limit switch, 15-synchronous motor.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
First determine acquisition performance good heliogreenhouse roof structure parameter, then adopt the method establishment regression equation of data fitting, choose the functional equation that index of correlation is larger, then compare roof heat insulation, determine the general expression of roofing curvilinear equation with this.By setting up heliogreenhouse Lighting model, its greenhouse light-inletting quantity being simulated to the roofing of different parameters curve, being compared from the angle of light-inletting quantity, heliogreenhouse roof heat insulation, to obtaining the optimal design parameter of heliogreenhouse front roof.
According to relevant result of study, find that heliogreenhouse roofing meets the following conditions:
The heat insulating ability size order of quadratic function, power function, logarithmic function shape roofing is:
Logarithmic function (r=1.01) < power function (r=1.03) < quadratic function (r=1.04)
Wherein: r is the fitting coefficient of respective function to greenhouse roof.
Integrated comparative, the heliogreenhouse roofing fitting function adopted in present embodiment illustrates as shown in Figure 2, roofing curve is combined by straightway ab (inclination angle is θ) and curved section bc, and wherein the expression formula of bc section curve selects power function, and the expression formula of roofing fitting function is:
y = t a n &theta; &CenterDot; x , 0 &le; x < h 1 &CenterDot; c t g &theta; y = &alpha; &CenterDot; x &beta; , h 1 &CenterDot; c t g &theta; &le; x &le; w
Wherein α, β are the positive parameter of non-zero undetermined.If c point coordinates is (w, h), b point coordinates is (w 1, h 1), then:
&alpha; = h / w &beta; &beta; = ( ln h - lnh 1 ) / ( ln w - lnw 1 )
In present embodiment, roofing overall width L 1=8.00m, determining that the roofing interface function of heliogreenhouse closes is:
y = 5.333 &CenterDot; x 0 &le; x &le; 0.15 y = 1.618 &CenterDot; x 0.371 0.15 &le; x &le; 8.00
The adverse grade elevation angle is 42 °, adverse grade width L 2=1.00 ~ 1.50m, roofing and adverse grade joint are roofing peak c, are highly 3.50m.
Based on a kind of heliogreenhouse wind-force automatic snow equipment of this heliogreenhouse, this equipment comprises blower fan 11, blower fan telecontrol equipment and control system;
Described blower fan telecontrol equipment comprises angle steel track 2, angle steel wheel 3, treadmill 6 and carrying platform 9, as shown in fig. 6-7, before and after two parallel angle steel tracks 2 adopt equilateral Zinc-coated angle steel, cost-saving as far as possible when not affecting equipment operational effect, alleviate investment burden; Angle steel is of a size of 25mm × 25mm × 3mm, is erected at greenhouse adverse grade by steel pipe 4, is positioned at insulation quilt and shutter rear, and along the elongated layout of greenhouse adverse grade, overall length is 60m; Wherein antero-lateral horn steel track 2 is set up on adverse grade, and rear side angle steel track 2 is set up in adverse grade and Hou Qiang joint, and the horizontal range between the angle of parallelism steel track 2 of two, front and back gets 0.50m; Steel pipe 4 external diameter of strut angle steel track 2 is 32mm, and thickness is 3mm, and left and right steel pipe 4 interval 3m arranges, and makes angle steel track 2 horizontal arrangement, is provided with and supports with the stability strengthening steel pipe 4 between the steel pipe 4 of two, front and back.As shown in Figure 3, treadmill 6 adopts thickness to be that the Q235 steel plate of 10mm is made, its corner, bottom side established angle steel wheel 3, and is erected on two angle steel tracks 2 by angle steel wheel 3, makes treadmill 6 can be freely movable along angle steel track 2; Described angle steel wheel 3 is 2.5 cun of V-structures, wheel footpath 59mm, and take turns wide 30mm, maximum load capacity is 350Kg, is applicable to any 90 ° of angle steel, and movable convenient, flexible; Angle steel is taken turns 3 surface spraying elastomeric materials and is prevented sleet sky slipping on angle steel track 2.As shown in Figure 4, carrying platform 9 adopts thickness to be the Q235 steel plate of 10mm, be erected at the top of treadmill 6, one end of left and right drive shaft is fixed in the left and right sides of carrying platform 9 respectively, after the other end is affixed with the connecting rod 10-1 of corresponding side respectively, with the upper end thereof of pole 10, support platform 9 can be rotated around drive shaft, thus realize swinging up and down of blower fan 11, reach the object of surface, removing greenhouse accumulated snow; Every side also comprises two driven spindles arranged in parallel with drive shaft, described two driven spindles are distributed in drive shaft both sides, its one end is fixed on carrying platform 9, and the other end is fixed on connecting rod 10-1, plays effect that is firm and that drive carrying platform 9 to rotate; The lower end of left and right pole 10 is separately fixed on treadmill 6, supports carrying platform 9; The rear side of carrying platform 9 is connected with treadmill 6 by coil tension spring 7, does not affect its oscillating motion while strengthening its steadiness; Front side rides on eccentric wheel 8, and eccentric wheel 8 is connected to synchronous motor 15 by rod member.Carrying platform 9 is provided with assembling seat 13, three assembling seats 13 and forms triangle, and an assembling seat 13 of rear side matches with the handle of blower fan 11, and two assembling seats of front side and the shelf size of blower fan 11 match; Blower fan 11, by being arranged on carrying platform 9 with the riveted joint of assembling seat 13, facilitates the installation of blower fan 11, and ensures enough intensity.
Be provided with windproof barb below described treadmill 6, windproof barb is parallel to angle steel track 2, and the crotch of its underpart matches with angle steel track 2 but do not contact, and does not affect sliding of treadmill 6; When there being strong wind to blow treadmill 6, windproof barb can catch on angle steel track 2, avoids strong wind to be thrown by treadmill 6.
Control system comprises motor 1, synchronous motor and two limit switches 14, and motor 1 riveted joint is arranged on below treadmill 6, moves horizontally together during work with treadmill 6, and is connected with blower fan 11 by wire 5; Synchronous motor is located on treadmill 6, is positioned at below carrying platform 9; Two limit switches 14 are erected at the two ends, left and right of angle steel track 2 respectively.Consider that motor 11 is with device walking, add slide rail below described angle steel track 2, as shown in Figure 8, wire 5 is laid on slide rail, can follow motor 1 move to make wire 5.
Because under different time, place and environment, the objective parameter such as wind speed, snowfall will have different changes, therefore the horizontal movement parameter designing of blower fan 11 comprises 0.2m/s, 0.5m/s, 1.0m/s tri-translational speeds.
If the coordinate of blower fan 11 is (x 1, y 1), wind-force coverage limit point coordinate is (x, y), according to formula:
Curved section bc arbitrfary point slope k=0.60x -0.629
Antenna height H=k (the x of blower fan 11 1-x)+y
Height D=H-(the 3.50-L of rear side angle steel track 2 2tan42 °)
Wind-force coverage first limit point coordinate is the coordinate at maximum magnitude place of manually sweeping away snow, the angle θ of blower fan 11 and vertical direction 1=arctan [(x 1-x)/(y 1-y)]
Wind-force coverage second limit point coordinate is roofing peak c, the angle θ of blower fan 11 and vertical direction 2=arctan [(x 1-8.00)/(y 1-3.50)]
For strengthening snow removing effect, blower fan 11 will have upper and lower continuous print to swing in vertical direction, to increase the area coverage that blower fan 11 removes the snow, the wherein pendulum angle θ=θ of blower fan 11 12
Wind-force coverage: ∫ (0.36x 1.258+ 1) dx ~ ∫ (9/25x 629/500+ 1) dx
Get people to be positioned at the horizontal extent that footing manually sweeps away snow and to be x=2.00m to the maximum, then wind-force coverage first limit point coordinate is (2,1.6182 0.371), wind-force coverage second limit point coordinate is (8,3.50), can obtain
1. when backhouse face width degree is 1.50m,
Wind-force coverage limit point slope k=0.388
The antenna height H=4.81m of blower fan 11;
The height D=2.66m of rear side angle steel track 2;
θ 1=68.7°,θ 2=37.4°,θ=31.4°
2. when backhouse face width degree is 1m,
Wind-force coverage limit point slope k=0.388
The antenna height H=4.61m of blower fan 11;
The height D=2.01m of rear side angle steel track 2;
θ 1=68.6°,θ 2=24.2°,θ=44.6°
So, when adverse grade width is 1 ~ 1.5m:
Antenna height H=4.61 ~ the 4.81m of blower fan 11;
Pendulum angle θ=44.6 of blower fan 11 ° ~ 31.4 °.
The hunting period of blower fan 11 is chosen to be 12s, according to 44.6 ° ~ 31.4 ° spans calculating angle of oscillation speed be 5.2 °/s ~ 7.4 °/s.
Air port design:
1. air outlet velocity is determined
Data shows: when temperature rises to-6 DEG C from-23 DEG C, and the starting wind velocity of 1m eminence is generally between 3.7-4.3m/s.Under the situation that the changes such as density of snow are smaller, starting wind velocity increases to some extent with the rising of temperature.If temperature is raised to-1 DEG C, because the water content of snow increases, the viscous force between snow grain significantly increases, and when only having starting wind velocity to increase to 7.6m/s, snow grain could start.According to this result of study, the wind speed of blower fan useful effect end is set as 7.6m/s by present embodiment.
2. inlet shape is determined
Utilize the air-spray correlation computations formula shown in table 1, find after comparing the relevant parameter of circle cross section jet and plane jet, the actual blowing snow effect of circle cross section jet will be weaker than plane jet.Therefore arrange the flat air port 12 of connection one in the outlet of blower fan 11, as shown in Figure 5, described flat air port 12 is gradual change platypelloid type, and outlet director 500mm, high 10mm, trailing spigot is of a size of the rectangle of 80mm × 100mm, is connected with the outlet of blower fan 11.Based on this:
Setting blower fan 11 rate of discharge: Q 0=0.4m 3/ s
Blower fan 11 useful effect end-to-end distance is from s=10m
Blower fan 11 useful effect end wind speed: V=7.6m/s
Environment turbulence factor gets a=0.08
According to the air-spray correlation computations formula shown in table 1, finally calculate:
b=1.02m,V 0=80.21m/s,Q=46.62m 3/s,V 1=3.11m/s,V 2=8.25m/s
Wherein b is jet half height, and Q is the gas flow of field of wind-force in 10m distant place that gas jet is formed, V 0for blower fan 11 outlet gas velocity, V 1for the gas mean velocity in section of field of wind-force in 10m distant place that gas jet is formed, V 2for the gaseous mass mean flow rate of field of wind-force in 10m distant place that gas jet is formed, d in plane jet design formulas 0for the hydraulic radius in air port, b 0for half height in air port.The power of blower fan 11 is 830w.
Table 1 air-spray correlation computations formula
Above-mentioned a kind of heliogreenhouse wind-force snow removing equipment is arranged on special vegetable base, little Tang mountain, Changping District, Beijing.The displacement of blower fan 11 on horizontal corner steel track 2 is a shuttling movement back and forth carried out back and forth, and the limit switch 14 that this motion process is equipped with a start/stop button master switch and angle steel track 2 two ends by motor 1 controls.After pressing " start/stop button ", motor 1 rotates forward, and chain-driving sheave rotates, and the treadmill 6 of carrying blower fan 11 starts forward on angle steel track 2 and runs.Limit switch 14 rear motor 1 touching angle steel track 2 end when treadmill 6 reverses, driving device counter motion, thus realizes blower fan 11 moving back and forth on angle steel track 2.At the end of snowing, after again pressing " start/stop button ", device is out of service.Dependence diagram as shown in Figure 9.
The while that blower fan 11 being reciprocating back and forth on angle steel track 2, synchronous motor 15 drives rod member to rotate, and the eccentric wheel 8 that rod member termination connects rotates thereupon.Because the center of eccentric wheel 8 is not on the point of rotation, carrying platform 9 front end contacted with eccentric wheel 8 is made to produce displacement in vertical direction, namely whole carrying platform 9 presents the oscillating motion around drive shaft, thus realizes swinging up and down of blower fan 11, increases wind-force blowing snow coverage.During x=0 ~ 8m, roofing straightway and curved section total length are 9.30m, harmless wind-force overlay length is 6.17m, i.e. wind-force horizontal coverage: x=2.00m ~ 8.00m, the vertical coverage of wind-force: y=2.09m ~ 3.50m, horizontal coverage scale is 66.34%, in conjunction with the artificial snow removing that people stands in footing place, reaches the object that roofing removes the snow comprehensively.

Claims (13)

1. a heliogreenhouse wind-force automatic snow equipment, is characterized in that, this equipment comprises blower fan (11), blower fan telecontrol equipment and control system;
Described blower fan telecontrol equipment comprises angle steel track (2), angle steel wheel (3), treadmill (6) and carrying platform (9), before and after two parallel angle steel tracks (2) be erected at greenhouse adverse grade by steel pipe (4), be positioned at insulation quilt and shutter rear, and along the elongated layout of greenhouse adverse grade, the corner, bottom side established angle steel wheel (3) of treadmill (6), and be erected on two angle steel tracks (2) by angle steel wheel (3), carrying platform (9) is erected at the top of treadmill (6), one end of left and right drive shaft is connected to the left and right sides of carrying platform (9), the other end respectively with the upper end thereof of the pole (10) of corresponding side, the lower end of left and right pole (10) is separately fixed on treadmill (6), carrying platform (9) is supported, the rear side of carrying platform (9) is connected with treadmill (6) by coil tension spring (7), front side rides on eccentric wheel (8), eccentric wheel (8) is connected to synchronous motor (15) by rod member, described blower fan (11) is arranged on carrying platform (9) top,
Control system comprises motor (1), synchronous motor (15) and two limit switches (14), motor (1) is arranged on treadmill (6) below, is connected with blower fan (11) by wire (5); Synchronous motor (15) is located on treadmill (6), is positioned at carrying platform (9) below; Two limit switches (14) are located at the two ends, left and right of angle steel track (2) respectively.
2. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, also comprise and drive shaft one or more driven spindle side by side, one or more driven spindle described is distributed in drive shaft both sides, its one end is connected on carrying platform (9), the other end is connected on connecting rod (10-1), after the other end of described drive shaft is connected with connecting rod (10-1), with the upper end thereof of pole (10).
3. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, the outlet of described blower fan (11) connects a flat air port (12), and the trailing spigot of described flat air port (12) and the outlet of blower fan (11) are connected.
4. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 3, it is characterized in that, described flat air port (12) is gradual change platypelloid type, outlet director 500mm, high 10mm.
5. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, described angle steel track (2) adopts equilateral Zinc-coated angle steel; Described angle steel wheel (3) is V-type, and surface spraying elastomeric material prevents slipping.
6. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, described treadmill (6) below is provided with windproof barb, windproof barb is parallel to angle steel track (2), the crotch of its underpart matches with angle steel track (2) but does not contact, when there being strong wind to blow treadmill (6), windproof barb can catch on angle steel track (2), avoids strong wind to be thrown by treadmill (6).
7. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, described carrying platform (9) is provided with assembling seat (13), three assembling seats (13) form triangle, an assembling seat (13) of rear side matches with the handle of blower fan (11), and two assembling seats (13) of front side and the shelf size of blower fan (11) match; Blower fan (11) is by being arranged on carrying platform (9) with the riveted joint of assembling seat (13).
8. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, the steel pipe (4) of strut angle steel track (2) is spaced, make angle steel track (2) horizontal arrangement, be provided with between the steel pipe (4) of two, front and back and support with the stability strengthening steel pipe (4).
9. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, the horizontal movement parameter designing of blower fan (11) comprises 0.2m/s, 0.5m/s, 1.0m/s tri-translational speeds.
10. a kind of heliogreenhouse wind-force automatic snow equipment according to claim 1, it is characterized in that, described angle steel track (2) below adds slide rail, and wire (5) is laid on slide rail, can follow motor (1) move to make wire (5).
11. according to the arbitrary claim of claim 1-10 a kind of heliogreenhouse wind-force automatic snow equipment, it is characterized in that, the roofing of heliogreenhouse is made up of straightway and curved section, roofing overall width L 1=8.00m, its interface function relation character box-like 1:
y = 5.333 &CenterDot; x 0 &le; x &le; 0.15 y = 1.618 &CenterDot; x 0.371 0.15 &le; x &le; 8.00 Formula 1
The adverse grade elevation angle is 42 °, adverse grade width L 2=1.00 ~ 1.50m, roofing and adverse grade joint are roofing peak c, be highly 3.50m, antero-lateral horn steel track (2) is set up on adverse grade, rear side angle steel track (2) is set up in adverse grade and Hou Qiang joint, get people to be positioned at the horizontal extent that footing manually sweeps away snow and to be x=2.00m to the maximum, then wind-force coverage first limit point coordinate is (2,1.6182 0.371), wind-force coverage second limit point coordinate is roofing and adverse grade joint, is (8,3.50), can obtains:
Antenna height H=4.61 ~ the 4.81m of blower fan (11);
Pendulum angle θ=44.6 of blower fan (11) ° ~ 31.4 °.
12. according to heliogreenhouse wind-force automatic snow equipment a kind of described in claim 11, it is characterized in that, the hunting period of described blower fan (11) is chosen to be 12s, according to 44.6 ° ~ 31.4 ° spans calculating angle of oscillation speed be 5.2 °/s ~ 7.4 °/s.
The method that 13. 1 kinds of heliogreenhouse automatic snow equipment carries out removing the snow, it is characterized in that, the limit switch (14) that the motion of blower fan (11) on angle steel track (2) is equipped with a start/stop button master switch and angle steel track (2) two ends by motor (1) controls, after pressing start/stop button, motor (1) rotates forward, treadmill (6) starts to run at the upper forward of angle steel track (2), when limit switch (14) rear motor (1) reversion of treadmill (6) touching angle steel track (2) end, drive treadmill (6) counter motion, thus realize blower fan (11) moving back and forth on angle steel track (2), simultaneously, synchronous motor (15) drives rod member to rotate, the eccentric wheel (8) that rod member termination connects rotates thereupon, because the center of eccentric wheel (8) is not on the point of rotation, carrying platform (9) front end contacted with eccentric wheel (8) is made to produce displacement in vertical direction, whole carrying platform (9) namely presents the oscillating motion around drive shaft, thus realize swinging up and down of blower fan (11), increase the coverage of wind-force automatic snow, after again pressing start/stop button, equipment is out of service.
CN201510964830.0A 2015-12-21 2015-12-21 A kind of heliogreenhouse wind-force automatic snow apparatus and method for Expired - Fee Related CN105544886B (en)

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