CN110771396A - Cultivation facility capable of annual production - Google Patents

Cultivation facility capable of annual production Download PDF

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Publication number
CN110771396A
CN110771396A CN201911034929.5A CN201911034929A CN110771396A CN 110771396 A CN110771396 A CN 110771396A CN 201911034929 A CN201911034929 A CN 201911034929A CN 110771396 A CN110771396 A CN 110771396A
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CN
China
Prior art keywords
support
cultivation facility
fixedly connected
transmission
rope
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Granted
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CN201911034929.5A
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Chinese (zh)
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CN110771396B (en
Inventor
姚洪涛
姚彬
姚思文
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.)
Haidai Ecological Construction Co ltd
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Shandong Haidai Garden Group Co Ltd
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Priority to CN201911034929.5A priority Critical patent/CN110771396B/en
Publication of CN110771396A publication Critical patent/CN110771396A/en
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Publication of CN110771396B publication Critical patent/CN110771396B/en
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    • 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
    • A01G9/1407Greenhouses of flexible synthetic material
    • 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
    • A01G9/22Shades or blinds for greenhouses, or the like
    • A01G9/222Lamellar or like blinds
    • 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
    • A01G9/22Shades or blinds for greenhouses, or the like
    • A01G9/227Shades or blinds for greenhouses, or the like rolled up during non-use
    • 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
    • A01G9/24Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Cultivation Of Plants (AREA)

Abstract

The invention discloses a cultivation facility capable of annual production, which belongs to the field of plant cultivation and comprises a frame body structure, wherein a heat insulation film is coated outside the outer layer of the frame body structure, an illumination control device covers the heat insulation film, and the illumination control device comprises at least two supports and one piece of sun-shading cloth which is less than the supports in number. Each support comprises two support rods symmetrically distributed on two sides of the support body structure, rotating shafts are arranged at the tops of the two support rods, and the rotating shafts of the two adjacent supports are in transmission connection through a plurality of transmission ropes; meanwhile, the support rod of any one support is also provided with a power device, and the power device is in transmission connection with the rotating shaft through a transmission device; the top of the transmission rope is covered with a piece of sun-shading cloth, wherein one side of the sun-shading cloth is fixedly connected with any one support, and the other side of the sun-shading cloth is fixedly connected with the transmission rope.

Description

Cultivation facility capable of annual production
Technical Field
The invention relates to the field of plant cultivation, in particular to a cultivation facility capable of annual production.
Background
The greenhouse mainly plays a role in early maturing and yield increasing when plants are planted or cultivated, and is used for pot flower and cut flower cultivation; fruit tree production is used for cultivating grapes, strawberries, watermelons, melons, peaches, oranges and the like; the forestry production is used for forest seedling culture, ornamental tree culture and the like. Mainly comprises a greenhouse which is warm in winter and a greenhouse which is warm in early spring according to functions. The greenhouse warm in winter is widely applied in the north, the cross section profile is semi-arch, the greenhouse warm in winter is mainly distributed along the east-west direction, the transparent film faces south, and sufficient illumination and effective warm keeping and moisture keeping can be guaranteed. The early spring greenhouse is widely applied in the south, the cross section outline is full-arch, the cross section outline is mainly distributed along the north and south directions, and the transparent film is fully surrounded; because the illumination in the south is strong, no method for conveniently controlling the illumination exists in the conventional greenhouse in early spring at the present stage. In view of this, the problem of illumination control in greenhouses in early spring is a major problem to overcome at present.
The patent application number is CN 201811352742.5's an invention creation, discloses a sunshade equipment of farming warmhouse booth with remote operation function, including the steelframe, the outside cladding of steelframe has the big-arch shelter to keep warm and covers, there is the mounting plate the top of installing support through the fix with screw, there is the rotation motor the top of mounting plate through the fix with screw, there is the drive fluted disc through the coupling joint on the output shaft of rotation motor, be connected with first rotation fluted disc and second rotation fluted disc respectively through the bearing on the steelframe, the impartial distance of one side that first rotation fluted disc and second rotation fluted disc kept away from each other evenly is provided with the rotating sprocket, the rotating sprocket is connected on the steelframe in the mode rotation that the ring array is. The rotary toothed disc and the chain wheel are designed to drive the sun shield to realize sun-shading operation on the greenhouse, the structure is complex, the manufacturing cost is high, although the sun-shading operation of the greenhouse can be realized through the design, the gravity of the sun shield is mainly borne by a greenhouse frame, so that the greenhouse has deformation risk, meanwhile, the sun-shading operation is performed along the peripheral radian of the whole greenhouse, the stress of each position of the chain wheel is uneven, and the reliability is low.
Disclosure of Invention
In view of the above defects or shortcomings in the prior art, the invention aims to provide a cultivation facility capable of annual production, which overturns the traditional production mode, can ensure that the greenhouse in early spring has reasonable illumination, and solves the technical problem that the illumination control of the greenhouse in early spring in the prior art is unfavorable.
The cultivation facility comprises a frame body structure, wherein an insulation film is coated outside the outer layer of the frame body structure and mainly made of polyvinyl chloride materials, a lighting control device covers the insulation film, and the lighting control device comprises at least two supports and a piece of sun-shading cloth less than the supports in number.
Each support comprises two support rods symmetrically distributed on two sides of the support body structure, rotating shafts are arranged at the tops of the two support rods, and the rotating shafts of the two adjacent supports are in transmission connection through a plurality of transmission ropes; meanwhile, the support rod of any one support is also provided with a power device, and the power device is in transmission connection with the rotating shaft through a transmission device;
the top of the transmission rope is covered with the sunshade cloth, wherein one side of the sunshade cloth is fixedly connected with any one support, and the other side of the sunshade cloth is fixedly connected with the transmission rope.
Furthermore, two ends of each transmission rope are respectively wound on the rotating shafts of two adjacent supports in a winding manner, rope ends at two ends of each transmission rope can be fixedly connected in a binding or welding manner, and meanwhile, the steel wire rope is tightly supported to enhance the static friction force between the transmission rope and the surface of the rotating shaft.
Further, the transmission rope is a steel wire rope or a hemp rope.
Furthermore, the power device is arranged at the bottom of the supporting rod and is an electric motor, a gear is further fixed on any rotating shaft, and the gear and the electric motor are in transmission through a chain.
Furthermore, each support also comprises two fixed beams which are respectively fixedly connected with the two support rods; one side of the sunshade cloth is fixedly connected with the fixed beam.
Furthermore, every bracing piece top fixedly connected with sliding sleeve, the sliding sleeve with the pivot slides and cup joints. The rotating shaft is ensured to slide smoothly on the top of the supporting rod.
Furthermore, the bottom surface of each sunshade cloth is fixedly connected with a plurality of annular structures movably sleeved with the steel wire ropes.
Furthermore, the bottom surface of each sunshade cloth is fixedly connected with a plurality of annular structures movably sleeved with the steel wire ropes.
Furthermore, the frame body structure comprises a plurality of arch frames which are uniformly arranged in a line, and the middle part of each arch frame is fixedly connected with a vertical downward upright rod. The function of the upright stanchion is mainly to support the arch frame.
Further, the cultivation facility also comprises a spraying device, wherein the spraying device comprises a water supply pipe, the water supply pipe is fixed on the bottom side of the arch frame, and a plurality of spraying heads are uniformly arranged on the bottom side of the water supply pipe. The delivery pipe intercommunication water supply system (municipal tap water pipeline or water pump supply), can spray irrigation to the agriculture and forestry plant in the cultivation facility, can also play the effect of keeping the inside humidity of cultivation facility simultaneously.
The invention has the beneficial effects that:
1. because illumination is stronger in south, and the solar altitude angle is high, the agricultural and forestry crop of planting in this cultivation facility heat preservation membrane, under illumination controlling means's effect, can be according to the inside light inlet amount of the weather condition real time control cultivation facility of the current day, solved among the prior art technical problem that big-arch shelter illumination control inefficiency early spring, the illumination control principle of this cultivation facility is: when the shading operation needs to be carried out, the power device drives the rotating shaft to rotate, the rotating shaft drives the transmission rope to move at the moment, and the two sides of the sunshade cloth are respectively fixedly connected with the transmission rope and the support, so that the sunshade cloth can be driven to extend and contract by the movement of the transmission rope, the light inlet quantity of the cultivation facility is controlled, meanwhile, the power can be transmitted to the other adjacent rotating shaft by the movement of the transmission rope, and the extension and the contraction of the adjacent sunshade cloth are achieved.
2. The transmission of two adjacent pivots is realized through the mode of winding wire rope respectively, and the structure principle is simple, not only saves time and laborsaving in the manufacturing process, and it is also very convenient in the maintenance process in the future simultaneously.
3. The annular structure can be a common key ring, and the design of the annular structure can be favorable for keeping the sunshade cloth to be tightly attached to the transmission rope, so that the sunshade cloth is more regular when being extended and contracted.
Drawings
FIG. 1 is a schematic view of a cultivation facility capable of annual production in an extended state;
FIG. 2 is a schematic view of a cultivation facility capable of annual production in a contracted state;
FIG. 3 is a schematic view of the illumination control principle;
fig. 4 is a frame structure diagram.
In the figure: 1. the device comprises a heat preservation film, 2, a support rod, 3, sun-shading cloth, 4, a sliding sleeve, 5, a rotating shaft, 6, a steel wire rope, 7, a power device, 8, a transmission device, 9, a fixed beam, 10, an annular structure, 11, an arch frame, 12, a vertical rod, 13 and a spray head.
It is noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments:
example 1
As shown in fig. 1 to 4, a cultivation facility that can produce throughout the year, this cultivation facility includes the support body structure, the outer outside cladding of support body structure has heat preservation membrane 1, heat preservation membrane 1 top covers has illumination controlling means, and illumination controlling means includes three support and two puggarees 3, and three support is from the front to back in proper order align to grid.
Each support comprises two support rods 2 symmetrically distributed on the left side and the right side of the support body structure, the tops of the two support rods 2 are respectively and fixedly connected with a sliding sleeve 4, a rotating shaft 5 is movably sleeved between the sliding sleeve 4 and the sliding sleeve 4, and the rotating shafts 5 of two adjacent supports are in transmission connection through three steel wire ropes 6; meanwhile, the support rod 2 of the bracket at the rearmost side is also provided with a power device 7, and the power device 7 is in transmission connection with the rotating shaft 5 through a transmission device 8; the sunshade cloth 3 covers the top of the steel wire rope 6, wherein each bracket further comprises two fixed beams 9, and the two fixed beams 9 are respectively and fixedly connected with the two support rods 2; the rear side of each piece of sun-shading cloth 3 is fixedly connected with the support rod 2 through a fixed beam 9. The other side of the sun-shading cloth 3 is fixedly connected with the steel wire rope 6 through glue. Two ends of each steel wire rope 6 are respectively wound on the rotating shafts 5 of the two adjacent supports in a winding manner, and rope ends at two ends of each steel wire rope 6 are fixedly connected, and meanwhile, the steel wire ropes 6 are guaranteed to be tightly supported, so that the static friction force between the steel wire ropes 6 and the surfaces of the rotating shafts 5 is enhanced.
The power device 7 is an electric motor, a gear is further fixed on any rotating shaft 5, and the gear and the electric motor are in chain transmission. The bottom surface of each sunshade cloth 3 is fixedly connected with a plurality of annular structures 10 movably sleeved with the steel wire ropes 6.
The frame body structure comprises a plurality of arch frames 11 which are uniformly arranged in a line, and the middle part of each arch frame 11 is fixedly connected with a vertical downward upright rod 12.
The cultivation facility further comprises a spraying device, wherein the spraying device comprises a water supply pipe, the water supply pipe is fixed on the bottom side of the arch-shaped frame 11, and a plurality of spraying heads 13 are uniformly arranged on the bottom side of the water supply pipe.
The working principle of the cultivation facility is as follows: when the shading operation is needed to be carried out, the motor controls the gear to rotate through chain transmission, the gear rotates to drive the corresponding rotating shaft 5 to rotate, the rotating shaft 5 drives the transmission rope to move at the moment, and because the two sides of the sunshade cloth 3 are respectively fixedly connected with the transmission rope and the support, the movement of the transmission rope can drive the sunshade cloth 3 to extend and contract, so that the light inlet quantity of the cultivation facility is controlled, meanwhile, the movement of the transmission rope can transmit the power to the other adjacent rotating shaft 5, and the extension and the contraction of the adjacent sunshade cloth 3 are realized.
Example 2
As shown in fig. 1 to 4, a cultivation facility that can produce throughout the year, this cultivation facility includes the support body structure, the outer outside cladding of support body structure has heat preservation membrane 1, heat preservation membrane 1 top covers has illumination controlling means, and illumination controlling means includes four supports and three puggaree 3, and three support is from the front to back in proper order align to grid.
Each support comprises two support rods 2 symmetrically distributed on the left side and the right side of the support body structure, the tops of the two support rods 2 are respectively and fixedly connected with a sliding sleeve 4, a rotating shaft 5 is movably sleeved between the sliding sleeve 4 and the sliding sleeve 4, and the rotating shafts 5 of two adjacent supports are in transmission connection through three hemp ropes; meanwhile, the support rod 2 of the bracket at the rearmost side is also provided with a power device 7, and the power device 7 is in transmission connection with the rotating shaft 5 through a transmission device 8; the top of the hemp rope is covered with a sun-shading cloth 3, wherein each bracket further comprises two fixed beams 9, and the two fixed beams 9 are respectively and fixedly connected with the two support rods 2; the rear side of each piece of sun-shading cloth 3 is fixedly connected with the support rod 2 through a fixed beam 9. The other side of the sun-shading cloth 3 is fixedly connected with the hemp rope through glue. Two ends of each hemp rope are respectively wound on the rotating shafts 5 of the two adjacent supports in a winding mode, and rope ends at two ends of each hemp rope are fixedly connected, and meanwhile, the tightness of the hemp ropes is guaranteed, so that the static friction force between the hemp ropes and the surfaces of the rotating shafts 5 is enhanced.
The power device 7 is an electric motor, a gear is further fixed on any rotating shaft 5, and the gear and the electric motor are in chain transmission. The bottom surface of each sunshade cloth 3 is fixedly connected with a plurality of annular structures 10 which are movably sleeved with the hemp ropes.
The frame body structure comprises a plurality of arch frames 11 which are uniformly arranged in a line, and the middle part of each arch frame 11 is fixedly connected with a vertical downward upright rod 12.
The cultivation facility further comprises a spraying device, wherein the spraying device comprises a water supply pipe, the water supply pipe is fixed on the bottom side of the arch-shaped frame 11, and a plurality of spraying heads 13 are uniformly arranged on the bottom side of the water supply pipe.
The working principle of the cultivation facility is as follows: when the shading operation is needed to be carried out, the motor controls the gear to rotate through chain transmission, the gear rotates to drive the corresponding rotating shaft 5 to rotate, the rotating shaft 5 drives the transmission rope to move at the moment, because the two sides of the sun-shading cloth 3 are respectively fixedly connected with the transmission rope and the support, the movement of the transmission rope can drive the sun-shading cloth 3 to extend and contract, the light inlet amount of the cultivation facility is controlled, meanwhile, the movement of the transmission rope can transmit the power to the other adjacent rotating shaft 5, the other adjacent rotating shaft 5 can drive the other group of transmission ropes corresponding to the rotation rope to move, and the like, and the light control work of the whole cultivation facility is realized.
The above description is only exemplary of the present invention, and not intended to limit the present invention, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Other technical features than those described in the specification are known to those skilled in the art, and are not described in detail herein in order to highlight the novel features of the present invention.

Claims (9)

1. The utility model provides a cultivation facility that can produce throughout the year, characterized by, this cultivation facility includes the support body structure, the outer outside cladding of support body structure has the heat preservation membrane, heat preservation membrane top covers there is illumination controlling means, illumination controlling means include two at least supports and than the puggaree that the support is a small amount.
Each support comprises two support rods symmetrically distributed on two sides of the support body structure, rotating shafts are arranged at the tops of the two support rods, and the rotating shafts of the two adjacent supports are in transmission connection through a plurality of transmission ropes; meanwhile, the support rod of any one support is also provided with a power device, and the power device is in transmission connection with the rotating shaft through a transmission device;
the top of the transmission rope is covered with the sunshade cloth, wherein one side of the sunshade cloth is fixedly connected with any one support, and the other side of the sunshade cloth is fixedly connected with the transmission rope.
2. The cultivation facility as claimed in claim 1, wherein each of the two ends of each of the driving ropes is wound around the rotating shaft of two adjacent brackets in a winding manner, and the ends of each of the driving ropes are fixedly connected.
3. The cultivation facility as claimed in claim 2, wherein the transmission rope is a steel wire rope or a hemp rope.
4. The cultivation facility as claimed in claim 3, wherein the power device is an electric motor, a gear is fixed to any one of the shafts, and the gear and the electric motor are driven by a chain.
5. The cultivation facility capable of being produced annually of claim 4, wherein each of the brackets further comprises two fixing beams, and the two fixing beams are fixedly connected with two support rods respectively; one side of the sunshade cloth is fixedly connected with the fixed beam.
6. The cultivation facility capable of being produced annually according to claim 5, wherein a sliding sleeve is fixedly connected to the top end of each supporting rod, and the sliding sleeve is in sliding sleeve connection with the rotating shaft.
7. The cultivation facility capable of annual production according to claim 6, wherein a plurality of annular structures movably sleeved with the steel wire ropes are fixedly connected to the bottom surface of each sunshade cloth.
8. A year round producible cultivation facility according to claim 1, wherein the frame structure comprises a plurality of arches arranged in a row, each arch having a vertically downward upright fixedly attached to its middle.
9. The cultivation facility as claimed in claim 8, further comprising a spraying means, the spraying means comprising a water supply pipe fixed to the bottom side of the arch frame, the water supply pipe having a plurality of spraying heads uniformly arranged on the bottom side.
CN201911034929.5A 2019-10-29 2019-10-29 Cultivation facility capable of annual production Active CN110771396B (en)

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CN110771396B CN110771396B (en) 2023-10-24

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103749220A (en) * 2014-02-11 2014-04-30 山西省农业科学院园艺研究所 Application of sunshade net to agriculture rain shielding and fruit tree rain shed made of sunshade net
CN204653180U (en) * 2015-05-19 2015-09-23 苏州市种子管理站 A kind of bilayer connects the puggaree length compensation mechanism of a multispan greenhouse
CN204907357U (en) * 2015-09-15 2015-12-30 滨州禾丰高效生态产业技术开发有限公司 Warmhouse booth guard net device
CN205567258U (en) * 2016-03-31 2016-09-14 广州睿绅生物技术有限公司 Automatic control sunshade that seedling full gloss was cultivated is cultivated by dendrobii officmalis caulis group
CN105961101A (en) * 2016-06-30 2016-09-28 福建省农业科学院茶叶研究所 Coverage awning for tea garden
CN205694655U (en) * 2016-06-11 2016-11-23 江苏中植农业科技有限公司 Temperature automatically controlled booth
CN207443692U (en) * 2017-11-28 2018-06-05 厦门市银农种苗有限公司 Greenhouse shading device
CN207927369U (en) * 2018-03-08 2018-10-02 贵州省烟草公司黔东南州公司 A kind of flue-cured tobacco seedling-cultivating greenhouse automatic sun shading device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103749220A (en) * 2014-02-11 2014-04-30 山西省农业科学院园艺研究所 Application of sunshade net to agriculture rain shielding and fruit tree rain shed made of sunshade net
CN204653180U (en) * 2015-05-19 2015-09-23 苏州市种子管理站 A kind of bilayer connects the puggaree length compensation mechanism of a multispan greenhouse
CN204907357U (en) * 2015-09-15 2015-12-30 滨州禾丰高效生态产业技术开发有限公司 Warmhouse booth guard net device
CN205567258U (en) * 2016-03-31 2016-09-14 广州睿绅生物技术有限公司 Automatic control sunshade that seedling full gloss was cultivated is cultivated by dendrobii officmalis caulis group
CN205694655U (en) * 2016-06-11 2016-11-23 江苏中植农业科技有限公司 Temperature automatically controlled booth
CN105961101A (en) * 2016-06-30 2016-09-28 福建省农业科学院茶叶研究所 Coverage awning for tea garden
CN207443692U (en) * 2017-11-28 2018-06-05 厦门市银农种苗有限公司 Greenhouse shading device
CN207927369U (en) * 2018-03-08 2018-10-02 贵州省烟草公司黔东南州公司 A kind of flue-cured tobacco seedling-cultivating greenhouse automatic sun shading device

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