CN114747402A

CN114747402A - Large-span greenhouse

Info

Publication number: CN114747402A
Application number: CN202210184773.4A
Authority: CN
Inventors: 李建明; 王杰
Original assignee: Northwest A&F University
Current assignee: Northwest A&F University
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-07-15
Anticipated expiration: 2042-03-01
Also published as: CN114747402B

Abstract

The invention relates to a large-span greenhouse, which comprises a greenhouse steel arch frame structure, a north wall double-layer heat-insulating structure, a gable heat-insulating structure, a stand column structure, a deep soil heat storage and release device, a heat brewing and gas supplementing device and a built-in aerobic fermentation bin, wherein the greenhouse steel arch frame structure is connected with the north wall double-layer heat-insulating structure, the gable heat-insulating structure is arranged at two sides of the greenhouse steel arch frame structure and the north wall double-layer heat-insulating structure, the greenhouse steel arch frame structure is supported by the stand column structure, the north wall double-layer heat-insulating structure comprises an outer layer arch frame, an inner layer arch frame, a pull rod, a heat preservation quilt, a transverse pull pipe and an arch frame connecting plate, the deep soil heat storage and release device is arranged in soil below the large-span greenhouse, the heat brewing and gas supplementing device is arranged outside the large-span greenhouse, and the built-in aerobic fermentation bin is arranged in the large-span greenhouse. The invention adopts large-span layout, improves the land utilization rate and is convenient for mechanized operation; meanwhile, the double-layer heat insulation structure of the biological heat brewing and underground deep heat storage and release system and the rear wall improves the heat insulation performance of the greenhouse.

Description

Large-span greenhouse

Technical Field

The invention belongs to the technical field of agricultural facilities, and particularly relates to a large-span greenhouse.

Background

With the continuous development of agricultural facility construction technology, the novel shed body structure is endless; in the aspect of wall body structures, brick walls and earth walls are still used as rear walls and gable wall structures in a plurality of current greenhouses, and although the wall bodies have good heat insulation performance, the civil engineering quantity is large, and the construction cost is high.

On the steel arch frame, in order to improve the safety of the greenhouse, a truss structure is mostly used, the structure consumes a large amount of steel, the welding cost is high, and the construction period is long; if the single-chord arch frame is used, the number of the indoor upright posts in the greenhouse can be increased to improve the stability of the greenhouse structure, and the indoor upright posts are not beneficial to mechanical operation.

The sunlight greenhouse and the plastic greenhouse are main facilities for producing fresh vegetables in China, so that the problem that vegetables are difficult to eat in the northern area in winter is solved, the yield of vegetables and fruits in the northern area and the southern area is greatly improved, good social and economic benefits are brought, and more farmers can get rich. A large number of defects of the prior structure of the large-span sunlight greenhouse, the large-span greenhouse and the large-span greenhouse also appear at present, but the prior large-span sunlight greenhouse, the large-span greenhouse and the large-span greenhouse still have the following defects:

1) the existing sunlight greenhouse is shaded due to the fact that the height of a rear wall is too high, the distance between the greenhouse and the greenhouse is large, land is wasted, and the land utilization rate is still not high.

2) The sunlight greenhouse has high construction cost, and the wall structure always occupies a great proportion.

3) Greenhouse and solar greenhouse ventilation forms water bags easily formed, and the structure and indoor crop growth are influenced.

4) Compared with a sunlight greenhouse, the greenhouse structure has weak wind and snow load resistance and is easy to have weak points of structure.

5) And no additional temperature increasing and reducing device is arranged, so that the growth of indoor crops is influenced.

In the growth process of plants in the greenhouse of the sunlight greenhouse and the plastic greenhouse, the fermentation bins are generally arranged outside the greenhouse, the use is very inconvenient, and CO2 and heat generated by the fermentation bins are not fully utilized.

In winter and spring in north, although the greenhouse has certain heat preservation and heat storage capacity, the temperature in the greenhouse is still too low, and CO still exists₂And the deficiency condition can finally affect the yield and the quality of crops. Aerobic fermentation on aerobic stripsUnder the condition, the biological degradation and synthesis process is carried out on the organic solid waste by utilizing the life metabolism of microorganisms, and finally, a stable high-quality product is produced, and heat, carbon dioxide and water are produced. Aerobic fermentation can generate high temperature of 60-70 ℃ under proper conditions, although many researches on heat recycling are carried out, the researches on the combination of aerobic fermentation and heat generation under the condition of not influencing the cultivation area are not many, and most of the researches are directed to the treatment of harmful gases generated by aerobic fermentation, and CO generated by the harmful gases is not generated₂Combined with cultivation, the deep research is carried out.

Disclosure of Invention

In order to solve the technical problems in the background art, the invention provides a large-span greenhouse, which adopts large-span layout, increases the internal space of the greenhouse, improves the land utilization rate and is convenient for mechanized operation; meanwhile, the double-layer heat insulation structure improves the heat insulation performance of the greenhouse and is beneficial to the production of overwintering vegetables.

The technical solution of the invention is as follows: the invention relates to a large-span greenhouse, which is characterized in that: the large-span greenhouse comprises a greenhouse steel arch frame structure, a north wall double-layer heat insulation structure, a gable heat insulation structure, a stand column structure, a deep soil heat storage and release device, a heat brewing and air supplementing device and a built-in aerobic fermentation bin, wherein the greenhouse steel arch frame structure is connected with the north wall double-layer heat insulation structure, the gable double-layer heat insulation structure is arranged on two sides of the greenhouse steel arch frame structure and the north wall double-layer heat insulation structure, the greenhouse steel arch frame structure is supported through the stand column structure, the north wall double-layer heat insulation structure comprises an outer layer arch frame, an inner layer arch frame, a pull rod, a heat insulation quilt, a transverse pull pipe and an arch frame connecting plate, the outer layer arch frame and the inner layer arch frame are both arc-shaped, the inner layer arch frame is arranged on the inner side of the outer layer arch frame and connected through the pull rod, the top of the outer layer arch frame is connected with the top of the inner layer arch frame through the arch frame connecting plate, the bottom of the outer layer arch frame and the inner layer arch frame are separately arranged, and the inner layer arch frame are both multiple, the outer layers of the arches and the inner layers of the arches are connected through a plurality of transverse pull pipes, heat preservation quilts cover the outer sides of the outer layers of the arches and the outer sides of the inner layers of the arches, the deep soil heat storage and release device is arranged in soil below the large-span greenhouse, the heat brewing and air supplementing device is arranged outside the large-span greenhouse, and the built-in aerobic fermentation chamber is arranged in the large-span greenhouse.

Furthermore, the greenhouse steel arch structure comprises an arch upper chord, an arch lower chord, double arch clamps, a framework connecting plate, a film clamping groove and arch transverse pull pipes, wherein the arch upper chord and the arch lower chord are both arc-shaped, the arch lower chord is arranged on the inner side of the arch upper chord and is connected with the arch upper chord through the double arch clamps, the top of the arch upper chord is connected with the top of the arch lower chord through the framework connecting plate, the bottom of the arch upper chord is connected with the bottom of the arch lower chord, the arch upper chord and the arch lower chord are both multiple, the multiple arch upper chords are connected with each other through the multiple arch transverse pull pipes, the film clamping groove is arranged on the outer side of the arch upper chord, the arch connecting plate is connected with the framework connecting plate, the gable heat-insulating structure comprises a main upright post, secondary upright posts, transverse pull rods, a gable vertical face heat-insulating quilt and a sliding door, the main upright posts are vertically arranged below the arch upper chord and the lower chord on the two sides of the composite greenhouse, the secondary upright posts are arranged on the two sides of the main upright post, and below the outer layer arch upper chord and the greenhouse, be provided with horizontal pull rod between auxiliary standing pillar and the main standing pillar, the main standing pillar and the auxiliary standing pillar outside are provided with gable facade heat preservation quilt, be provided with the push-and-pull door between the auxiliary standing pillar of outer bow member below, the stand structure includes the stand, the horizontal trombone slide of stand, the horizontal pull rod of stand, stand top bracing and bridging, the vertical bow member top chord below that sets up in compound greenhouse of stand, the top is connected with the bow member top chord, the stand is a plurality of, connect through the horizontal trombone slide of stand between a plurality of stand tops, connect through the horizontal pull rod of stand between a plurality of stand middles, be provided with stand top bracing between the horizontal trombone slide of stand and the stand, be provided with bridging between the horizontal trombone slide of stand and the horizontal pull rod of stand.

Further, the large-span greenhouse still includes two girder construction, two girder construction include upper beam, underbeam and upper and lower roof beam connecting piece, connect through upper and lower roof beam connecting piece between upper beam and the underbeam, and upper and lower roof beam connecting piece sets up between bow member connecting plate and skeleton connecting plate, and upper and lower roof beam connecting piece upwards extends to outside the upper beam, constitutes the heat preservation and is prevented turning over the structure.

Furthermore, the large-span greenhouse also comprises a foundation and embedded parts, wherein the foundation and the embedded parts comprise a plurality of greenhouse arch frame foundations and independent foundations, the greenhouse arch frame foundations are provided with ring beam reinforcing ribs and ring beam skeleton connecting embedded parts, the outer layer arch frame bottom, the inner layer arch frame bottom, the arch frame upper chord bottom and the arch frame lower chord bottom are respectively connected with the embedded parts through the ring beam reinforcing ribs and the ring beam skeleton connecting embedded parts and are arranged on the greenhouse arch frame foundations, the independent foundations are provided with reinforcing ribs and independent foundation upright post connecting embedded parts, and the upright post bottoms are arranged on the independent foundations through the reinforcing ribs and the independent foundation upright post connecting embedded parts.

Further, it includes the air-blower to hold heat release device, the admission line, heat transfer pipeline and the pipeline of giving vent to anger, the admission line passes through heat transfer pipeline and is connected with the pipeline of giving vent to anger, the admission line is fixed in on the stand, the air-blower is connected with the air inlet of admission line, the air-blower is located 50-100 cm position departments in the high below of large-span greenhouse top spine, heat transfer pipeline is horizontal heat transfer pipeline, heat transfer pipeline is the S type and arranges, heat transfer pipeline buries in the soil of large-span greenhouse below, heat transfer pipeline buries the degree of depth 2-4 m, the pipeline of giving vent to anger is located the planting in the large-span greenhouse and goes out the gas outlet height and crop canopy highly uniform of pipeline of giving vent to anger.

Further, the built-in aerobic fermentation bin comprises a fermentation bin body, a material cavity is arranged at the upper part in the fermentation bin body, a permeate cavity is arranged at the lower part, the material cavity and the permeate cavity are separated by a filter screen, an opening is transversely formed in the middle of the top of the fermentation bin body, cover plates capable of being opened and closed are arranged on two sides of the opening, sliding grooves are respectively formed in the top and the bottom of the side face of the fermentation bin body, side plates capable of sliding along the sliding grooves are arranged between the sliding grooves, a plurality of vent holes are formed in the top of the fermentation bin body, the vent holes are located on two sides of the opening, the diameter of each vent hole is 0.2mm, the interval is 0.2m, vent holes are formed in the side face of the permeate cavity, the diameter of each vent hole is 0.1m, the fermentation bin body, the cover plates and the side plates are all made of stainless steel, the filter screen is a 304 stainless steel wire screen, the wire diameter is 0.1mm, and the filter screen is an 80-mesh filter screen.

Furthermore, the brewing heat gas supplementing device comprises a fermentation area, a humidifying device is arranged above the fermentation area, a ventilating device is arranged in the fermentation area, the ventilating device comprises a gas inlet pipeline fan, a gas inlet pipe, a gas outlet pipeline fan and a gas filtering device, the gas inlet pipeline fan is connected with the gas inlet pipe, the gas inlet pipe is arranged in the fermentation area in a side-by-side vertical mode, the gas inlet pipe is communicated with the gas inlet pipeline, the gas inlet pipeline is connected with the gas inlet pipeline fan, a plurality of gas outlet holes are vertically arranged on the gas inlet pipe, the gas outlet pipe is connected with the gas filtering device through the gas outlet pipeline fan, the gas outlet pipe is arranged in the fermentation area in a side-by-side vertical mode, the gas outlet pipes are communicated with the gas outlet pipeline, the gas outlet pipeline is connected with the gas outlet pipeline fan, and the humidifying device comprises a water inlet pipe, a water distributing branch pipe and a nozzle connected with a water distributing branch pipe, the inlet tube transversely sets up in the fermentation district top, the branch pipe of dividing is a plurality of, the equipartition is on the inlet tube, and with the inlet tube intercommunication, it still includes the heat preservation device to brew hot air supplement unit, the heat preservation device keeps warm including the fermentation by with can keep warm by the heat preservation of packing up roll curtain ware, the fermentation keeps warm and is covered on the fermentation district, the fermentation district bottom is provided with the waste liquor collecting vat, the filter screen is established to the waste liquor collecting vat upper berth, the fermentation district outside is provided with the fermentation canopy, humidification device, ventilation unit and heat preservation device all set up in the fermentation canopy.

Furthermore, a top vent is arranged above the upper chord of the arch frame, a skylight capable of being opened and closed is arranged on the top vent, the skylight is connected with a skylight opening and closing device, the skylight opening and closing device comprises a speed reducer, a rack, a transmission shaft and a gear, the speed reducer is arranged on the upper chord of the arch frame below the skylight, the speed reducer is connected with the gear through the transmission shaft, the gear is meshed with the rack, the upper end of the rack is connected with the skylight, a bottom vent is arranged below the upper chord of the arch frame, a window covering layer and an electric film winder capable of winding and unwinding the window covering layer are arranged on the bottom vent, and the window covering layer is composed of an outer PO film and an inner insect-proof net.

Furthermore, stairs and handrails are arranged above the upper chord of the arch frame on the side surface of the large-span greenhouse, and the handrails are arranged on the outer side of the stairs.

Furthermore, the total length of the large-span greenhouse is 80-200 m, the span is 16.8m, the ridge height of the greenhouse is 7m, and the span of the steel arch structure of the greenhouse is larger than that of a double-layer heat insulation structure of a north wall.

The invention provides a large-span greenhouse, which is mainly used for a vegetable production greenhouse, wherein the east-west length of the greenhouse is prolonged by 80-200 m, the span is 16.8m, the ridge height is 7m, and the east wall, the west wall and the north wall are of a heat-insulating material composite double-layer wall structure; the greenhouse structure comprises a steel arch frame, a greenhouse main body, a heat insulation structure, a ventilation structure, an ear room and a stair, wherein the greenhouse main body is formed by a transparent covering material and a heat insulation material which cover the surface of the steel arch frame; the heat preservation structure comprises a rear roof double-layer heat preservation cover, and the ventilation structure of the east-west side gable double-layer heat preservation structure comprises bottom ventilation and top ventilation. Therefore, the invention has the following advantages:

1) the invention has the span of 16.8m, the ridge height of 7m, large internal space and few upright columns, improves the land utilization rate and is convenient for mechanized operation.

2) The steel arch frame is in threaded connection with the bolt embedded part, the transverse pull pipe is in threaded connection with the upper chord of the arch frame in a clamping part connection mode, and the stand column is in threaded connection with the bolt embedded part.

3) The steel double-layer heat-insulation north wall and double-layer heat-insulation gable wall structure is formed by a steel structure and a heat-insulation quilt, has excellent heat-insulation effect, does not have civil engineering, and does not have construction waste to pollute the environment when a greenhouse is dismantled.

4) The built-in aerobic fermentation bin adopts a double-layer double-cavity solid-liquid separation structure, heats the soil of a plant root system by utilizing heat generated in the fermentation process, is provided with the vent hole at the top, is convenient for CO2 to be discharged to increase the photosynthesis efficiency of the plant, and can act on the growth of the plant in time to improve the production efficiency of the plant.

5) The heat brewing and gas supplementing device provided by the invention solves the problems of low temperature and CO in a large-span greenhouse in winter by utilizing heat generated by aerobic fermentation₂The problem of deficiency. Simultaneous cyclic utilization of O in greenhouse₂The method provides favorable environment for microorganisms in the aerobic fermentation of the pile, finally realizes carbon neutralization and carbon emission, has simple operation and small investment, is installed outside the greenhouse without occupying a planting area, increases the planting area, improves the economic benefit, and can utilize O in the greenhouse₂With the heat and CO inside the stack₂Performing replacement until O required by the stack is satisfied₂Simultaneously, the greenhouse can be provided with heat and CO required by plant growth₂Therefore, the yield of crops is improved, the economic benefit is increased, the thermal insulation material can be started to preheat by utilizing the external illumination at noon in the initial fermentation stage, a proper temperature environment is provided for the fermentation pile body, and the aerobic fermentation process is promoted.

5) The invention embeds a set of deep heat storage and release devices every 6m underground of a large-span greenhouse, an air inlet pipeline is fixed at the upright post of the greenhouse, a blower connected with an air inlet is positioned at the position 50-100 cm below the ridge height at the top of the greenhouse, the depth of the heat exchange pipeline is 2-4 m, the heat exchange pipeline is arranged in a winding manner, the length is determined according to the heating load of the greenhouse, the average operating efficiency of the single set of devices is ensured to be more than 85%, an air outlet pipeline is positioned in a planting row, the height of an air outlet of the air outlet pipeline is consistent with the height of a crop canopy, the indoor temperature and air temperature can be obviously improved in winter, the air humidity can be reduced, the temperature can be reduced in summer, the annual low-carbon production of crops in the greenhouse can be realized, compared with the traditional sunlight greenhouse, the land utilization rate is obviously improved, the construction cost is reduced, and the construction parameters of the deep soil heat storage and release devices for the greenhouse are scientifically and reasonably determined, long service life, low cost and can realize the yield and income increase of vegetables. And the operation can be performed according to control strategies such as temperature control, time control and the like.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a conventional arch structure of the present invention;

FIG. 3 is a schematic view of the reinforced arch structure of the present invention;

FIG. 4 is a schematic structural view of a column structure and a double beam structure of the present invention;

FIG. 5 is a schematic view of the foundation and embedment structure of the present invention;

FIG. 6 is a schematic view of the heat storage and release device of the present invention;

FIG. 7 is a schematic view showing the application of the heat accumulating and releasing device of the present invention;

FIG. 8 is a schematic structural view of the internal aerobic fermentation chamber of the present invention;

FIG. 9 is a schematic view of the application of the internal aerobic fermentation chamber of the present invention;

FIG. 10 is a schematic view of the construction of the air-warming device of the present invention;

FIG. 11 is a schematic view of the application of the thermal-brewing air-replenishing device of the present invention.

The reference numerals are illustrated below:

101. the arch frame is strung; 102. the arch frame transversely pulls the pipe; 103. a film clamping groove; 104. the lower chord of the arch frame; 105. a double-arch card; 106. a framework connecting plate;

201. a motor; 202. a rack; 203. a drive shaft; 204. a gear; 205. a skylight;

301. an electric film winder; 302. a window covering layer;

401. an outer layer arch frame; 402. an inner layer arch frame; 403. a heat preservation quilt; 404. a pull rod; 405. transversely pulling the tube; 406. an arch center connecting plate;

501. a main upright post; 502. a secondary upright post; 503. a transverse pull rod; 504. the heat preservation quilt is used for the facade of the gable; 505. a sliding door;

601. an upper beam; 602. a lower beam; 603. an upper beam and a lower beam connecting piece;

7. the heat preservation quilt is prevented turning over the structure;

801. a column; 802. transversely pulling the upright post into a tube; 803. a column transverse pull rod; 804. the top part of the upright post is provided with an inclined strut; 805. a scissor support;

901. filtering with a screen; 902. a vent hole; 903. a cover plate; 904. a material cavity; 905. a chute; 906. a vent; 907. a permeate chamber; 908. a side plate; 909. an opening; 910. a built-in aerobic fermentation bin.

1001. An arch frame foundation is arranged on the outer side of the periphery of the greenhouse; 1002. water is dispersed outside the periphery of the greenhouse; 1003. inner arch frame foundations of the gable wall and the north wall; 1004. an independent foundation; 1005. reinforcing bars; 1006. reinforcing bars for the ring beam; 1007. the framework at the ring beam is connected with the embedded part; 1008. the upright post at the independent foundation is connected with the embedded part;

1101. a fermentation shed; 1102. fermenting and insulating quilt; 1103. a heat-insulating roller shutter; 1104. a water inlet pipe; 1105. a water diversion branch pipe; 1106. an air inlet pipe; 1107. an air outlet pipe; 1108. an air outlet pipeline fan; 1109. a gas filtering device; 1110. a waste liquid collecting tank; 1111. an air outlet; 1112. an air outlet pipe; 1113. a fermentation zone.

1201. A staircase; 1202. a handrail.

1301. A blower; 1302. an air intake duct; 1303. a heat exchange conduit; 1304. an air outlet pipe; 1305. deep soil; 1306. an air outlet; 1307. the ridge is high.

Detailed Description

The general aspects of the invention will be described in further detail below with reference to the following figures and specific examples:

the following will specifically describe the arch structure of the present invention with reference to fig. 1, 2, 3, 4 and 5:

referring to fig. 1 to 5, the structure of the embodiment of the present invention includes a greenhouse steel arch structure, a north wall double-layer insulation structure, a gable insulation structure, a column structure, a double-beam structure, a foundation and an embedded part, the greenhouse steel arch structure is connected with the north wall double-layer insulation structure, the gable double-layer insulation structure is disposed on two sides of the greenhouse steel arch structure and the north wall double-layer insulation structure, wherein:

the double-layer heat preservation structure of the north wall comprises an outer layer arch frame 401, an inner layer arch frame 402 and a pull rod 404, the heat preservation quilt 403, the transverse pull pipes 405 and the arch frame connecting plates 406, the outer layer arch frame 401 and the inner side arch frame 402 are both arc-shaped, the inner layer arch frame 402 is arranged on the inner side of the outer layer arch frame 401, the outer layer arch frame 401 is an 80mm 40mm 3.0mm hot galvanizing flat oval pipe, the inner layer arch frame 402 is a 70mm 30mm 2.0mm hot galvanizing flat oval pipe, the outer layer arch frame 401 and the inner layer arch frame 402 are connected through the pull rods 404, the top of the outer layer arch frame 401 is connected with the top of the inner side arch frame 402 through the arch frame connecting plates 406, the bottom of the outer layer arch frame 401 and the bottom of the inner side arch frame 402 are separately arranged, the outer layer arch frame 401 and the inner layer arch frame 402 are multiple, the outer layer arch frames 401 and the inner layer arch frames 402 are connected through the transverse pull pipes 405, the transverse pull pipes 405 are 2.75mm DN20 steel pipes, and the outer side of the outer layer arch frame 401 and the outer side of the inner side arch frame 402 are both covered with the heat preservation quilt 403. The distance between two wall foundations formed by the outer layer arch 401 and the inner layer 402 is 0.8m, and the inner layer heat preservation quilt and the outer layer heat preservation quilt are both 50mm glue-sprayed cotton heat preservation quilts or other heat preservation quilts. The arch connecting plate 406 is a connecting steel plate 10mm thick.

The gable heat insulation structure comprises a main upright column 501, auxiliary upright columns 502, transverse pull rods 503, gable facade heat insulation quilts 504 and sliding doors 505, wherein the main upright column 501 is vertically arranged below the upper chord 101 of the arches on the two sides of the composite greenhouse, a plurality of auxiliary upright columns 502 are arranged on the two sides of the main upright column 501 and are respectively vertically arranged below the upper chord 101 of the arches on the two sides of the composite greenhouse and below the outer arch 401, the transverse pull rods are arranged between the auxiliary upright columns 502 and the main upright columns 501, the gable facade heat insulation quilts 504 are arranged on the outer sides of the main upright columns 501 and the auxiliary upright columns 502, and the sliding doors 505 are arranged between the auxiliary upright columns 502 below the outer arch 401. The specification of the sliding door 505 is 2.0m 2.2m, a small door of 1.0m 1.8m is arranged on the door and used for the entrance and exit of daily work, and the gable facade heat preservation quilt 504 is a 100mm glue-sprayed cotton heat preservation quilt or other heat preservation quilts. The main upright column 501, the auxiliary upright column 502 and the transverse pull rod 503 are all hot galvanized square steel with the thickness of 40mm by 2.75 mm; the outer layer arch center 401 and the arch center upper chord 101 of the gable heat insulation structure at the outer side in the embodiment, 1 main upright 501, 9 auxiliary uprights 502 and 6 transverse pull rods 503.

Therefore, the wall body in the east, west and north of the invention is a heat-insulating material composite wall body structure.

The stair 1201 is arranged above an arch center upper chord 101 on the side surface of the composite greenhouse and is formed by welding two galvanized steel pipes with the DN25 thickness of 2.75mm on the arch center upper chord 101, a handrail 1202 with the height of 0.6m is arranged on the outer side, and the handrail 1202 is made of a galvanized steel pipe with the DN20 thickness of 2.0 mm.

The greenhouse steel arch structure in the embodiment of the invention adopts an alternative arrangement form of common arches G1 and reinforced arches G2, wherein one common arch G1 is longitudinally arranged at each 1m, and one reinforced arch G2 is arranged at each 6 m.

Referring to fig. 2, the common arch G1 includes an arch upper chord 101, an arch transverse pull tube 102 and a film clamping groove 103; the upper arch chord 101 is an arc-shaped hot-galvanized flat oval steel pipe made of bent materials, the top of the upper arch chord 101 is connected with an arch connecting plate 406 through an upper beam connector 603 and a

lower beam connector

603, 7 film clamping grooves 103 are formed in the outer side of the upper arch chord 101, a plurality of upper arch chords 101 are formed, and the plurality of upper arch chords 101 are connected through arch transverse pull pipes 102. The arch frame cross-pulling pipe 102 is a hot-dip galvanized pipe with the thickness of 2.75mmDN32 and is connected with the arch frame upper chord 101 by a clamping piece.

Referring to fig. 3, the reinforced arch G2 includes an arch upper chord 101, an arch transverse pull tube 102, a film clamping groove 103, an arch lower chord 104, a double arch clamp 105 and a skeleton connecting plate 106; the upper chord 101 and the lower chord 104 of the arch are both arc-shaped, the upper chord 101 of the arch is a bent hot-galvanized flat oval steel pipe, the lower chord 104 of the arch is a hot-galvanized round pipe and the lower chord 104 of the arch is arranged on the inner side of the upper chord 101 of the arch and connected through a double-arch clamp 105, the upper end of the double-arch clamp 105 is in threaded connection with the upper chord 101 of the arch, and the lower end of the double-arch clamp is in threaded connection with the lower chord 104 of the arch; the top of the upper arch chord 101 is connected with the top of the lower arch chord 104 through a framework connecting plate 106 and an upper and lower beam connecting piece 603 and an arch connecting plate 406, the bottom of the upper arch chord 101 is connected with the bottom of the lower arch chord 104 through a framework connecting plate, the framework connecting plate is used for screwing with an embedded part, the upper arch chord 101 and the lower arch chord 104 are multiple, the upper arch chords 101 are connected through a plurality of arch cross-bracing tubes 102, the arch cross-bracing tubes 102 are hot-dip galvanized steel tubes with the thickness of 2.75mmDN32, and are connected with the upper arch chord 101 through clamping pieces. The upright 801 is vertically arranged below the upper chord 101 of the arch frame, is positioned at the south shift 1.5m of the highest point of the composite greenhouse and is used for supporting the reinforced arch frame G2. The frame connecting plate 106 is a connecting steel plate with a thickness of 10 mm.

The outer side of the arch frame upper chord 101 is covered with a transparent covering material and is fixed through a film clamping groove 103, and the arch frame upper chord 101 is provided with a top ventilation opening and a bottom ventilation opening; wherein:

the top vent is arranged above the arch upper chord 101, the top vent is provided with a skylight 205 capable of being opened and closed, the skylight 205 is connected with a skylight opening and closing device, the skylight opening and closing device comprises a speed reducer 201, a rack 202, a transmission shaft 203 and a gear 204, the speed reducer 201 is arranged on the arch upper chord 101 below the skylight, the speed reducer 201 is connected with the gear 204 through the transmission shaft 203, the gear 204 is meshed with the rack 202, and the upper end of the rack 202 is connected with the skylight 205. The speed reducer 201 drives the rack 202 to move up and down, so that the skylight 205 can be automatically opened and closed. The outer layer covering material of the skylight 205 is a PO film, an insect-proof net is arranged at the window, and a wire mesh is laid under the PO film to prevent water accumulation.

The bottom ventilation device is arranged below the upper chord 101 of the arch frame, a window covering layer 302 and an electric film rolling device 301 capable of rolling and releasing the window covering layer 302 are arranged on the bottom ventilation opening, and the window covering layer 302 is composed of an outer layer PO film and an inner layer insect-proof net.

Referring to fig. 4, the double-beam structure of the present invention is located at the highest point of the composite greenhouse, and comprises an upper beam 601, a lower beam 602 and upper and lower beam connectors 603, wherein the upper beam 601 is made of 80mm × 40m × 2.75mm hot-dip galvanized square steel, the lower beam 602 is made of 40mm × 2.75mm hot-dip galvanized square steel, the distance between the two beams is 0.53m, the upper beam and the lower beam are connected by the upper and lower beam connectors 603 every 1m, and the upper and lower beam connectors 603 are made of 40mm × 2.75mm hot-dip galvanized square steel; the upper beam connecting piece 603 and the lower beam connecting piece 603 are arranged between the arch frame connecting plate 406 and the framework connecting plate 106, and the upper beam connecting piece 603 and the lower beam connecting piece 603 extend one square steel for 0.4m every 6m to form a heat preservation quilt overturn-preventing structure 7 for preventing the heat preservation quilt from overturning.

The upright post structure comprises upright posts 801, upright post transverse pull pipes 802, upright post transverse pull rods 803, upright post top inclined struts 804 and shear struts 805, wherein the upright posts 801 are vertically arranged below an arch center upper chord 101 in a composite greenhouse, the tops of the upright posts 801 are connected with the arch center upper chord 101, the tops of the upright posts 801 are connected through the upright post transverse pull pipes 802, the middle parts of the upright posts 801 are connected through the upright post transverse pull rods 803, and the upright post top inclined struts 804 are arranged between the upright post transverse pull pipes 802 and the upright posts 801, so that the structural stability of the greenhouse is improved. A cross brace 805 is arranged between the upright post transverse pull pipe 802 and the upright post transverse pull rod 803. The column cross tie 802 and the column cross tie 803 are both 40mm 2.5mm hot galvanized square steel.

The stand 801 moves 1.5m from the ridge height south, is provided with the horizontal trombone slide 802 of stand between stand 801 top and north wall inlayer bow member 402, and the design of this kind of structure not only improves greenhouse structure's stability, and reduces the consumptive material, and single file stand 801 has also greatly reduced simultaneously and has sheltered from, makes things convenient for mechanized operation.

In this embodiment, the number of the upright columns 801 is 6m, the connecting part of the tops of the upright columns 801 and the upper chord 101 of the arch frame is provided with an upright column transverse pull pipe 802, and the upright columns 801 are provided with an upright column transverse pull rod 803 according to the height of 2.5m above the ground, so that the structural stability of the greenhouse is improved, the production operation is not influenced by the design of the transverse pull structure, and the transverse pull structure can be used for hanging a light supplement lamp and a spraying system or hanging tendrils from plants at the height of 2.5 m.

Referring to fig. 5, the foundation and the embedded part of the invention comprise a plurality of greenhouse arch foundations and independent foundations 1004, wherein the greenhouse arch foundations are provided with ring beam reinforcing bars 1006 and embedded part 1007 connected to the ring beam skeleton, the bottom of the outer layer arch 401, the bottom of the inner layer arch 402, the bottom of the arch upper chord 101 and the bottom of the arch lower chord 104 are respectively arranged on the greenhouse arch foundations through the ring beam reinforcing bars 1006 and the embedded part 1007 connected to the ring beam skeleton, the independent foundations 1004 are provided with reinforcing bars 1005 and embedded part 1008 connected to the independent foundation upright posts, and the bottoms of the upright posts 801 are arranged on the independent foundations 1004 through the reinforcing bars 1005 and the embedded part 1008 connected to the independent foundation upright posts.

In this embodiment, the greenhouse arch frame foundation is divided into a greenhouse peripheral outer side arch frame foundation 1001 and a gable and north wall inner side arch frame foundation 1003, greenhouse peripheral outer side water distribution 1002 is arranged outside the greenhouse peripheral outer side arch frame foundation 1001, the bottom of the outer layer arch frame 401, the bottom of the arch frame upper chord 101 and the bottom of the arch frame lower chord 104 are respectively arranged on the greenhouse peripheral outer side arch frame foundation 1001 through a girt reinforcing bar 1006 and a girt position skeleton connecting embedded part 1007, and the bottom of the inner layer arch frame 402 is arranged on the gable and north wall inner side arch frame foundation 1003 through the girt reinforcing bar 1006 and the girt position skeleton connecting embedded part 1007.

The ring beam skeleton connection embedded parts 1007 and the independent foundation upright post connection embedded parts 1008 are both bolt structures and are used for screwing the arch centering and the upright post, and the ground anchor embedded parts are embedded in the middle of the adjacent ring beam skeleton connection embedded parts 1007 and are used for screwing the film rope.

The base depth of the greenhouse arch frame is 0.91m, the greenhouse arch frame comprises a 150mm thick lime soil cushion layer from bottom to top, and the tamping coefficient is more than 0.95; 1 layer of 37 brick foundation and 11 layers of 24 brick foundation; the ring beam reinforcing ribs 1006 are 240mm thick C20 ring beams;

the independent foundation 1004 is 0.9m deep and comprises a 150mm thick lime soil cushion layer from bottom to top, and the tamping coefficient is more than 0.95; 700mm 700mmC20 concrete piers 50mm thick; 500mm C20 concrete pier with thickness of 600 mm; the reinforcing ribs 1005 are 240mm thick C20 ring beams;

the skeleton at the ring beam is connected with the embedded part 1007 which is composed of 150mm X150 mm thick 10mmQ235 steel plates and 4 pieces of 250mm long

Welding the steel bars; upright column connection device at independent foundationThe embedded part 1008 is made of 150mm by 150mm thick 10mm Q235 steel plates and 4 pieces 530mm long

And welding the steel bars.

The invention can also be provided with a fabricated ear house which is positioned at the east side or the west side of the composite greenhouse. The width of the ear room east and west is 3.5m-4m, the length of the ear room south and north is 4m, the independent foundation is consistent with that of the composite greenhouse, a door is arranged on the vertical surface of the south, and the specification of the door is 2m x 2 m; the west vertical face or the east vertical face is provided with a window, the window is a 1.2 m-1.2 m plastic steel window and is positioned between the two south vertical columns, and the bottom of the window is 0.9m away from the ground; the assembled earhouse steel frame is made of hot galvanized square steel with the thickness of 50mm 2.75 mm; the covering material at the periphery and the top of the assembled ear room is a heat-preservation color steel plate with the thickness of 100 mm.

The invention has the advantages of prolonged east-west, north-south orientation, total length of 80-200 m, span of 16.8m, greenhouse ridge height of 7m, and span of greenhouse steel arch frame structure larger than that of double-layer heat insulation structure of north wall.

The heat storage and release device of the present invention will be described in detail with reference to FIGS. 6 and 7:

referring to fig. 6, the structure of the heat storage and release device of the present invention comprises a blower 1301, an air inlet pipe 1302, a heat exchange pipe 1303 and an air outlet pipe 1304, wherein the blower 1301 is connected to an air inlet of the air inlet pipe 1302, and the air inlet pipe 1302 is connected to the air outlet pipe 1302 through the heat exchange pipe 1303. The air intake pipe 1302 is fixed to the vertical pole 801 of the greenhouse. The blower 1301 is located 50-100 cm below the ridge height 1307 at the top of the greenhouse. The heat exchange pipe 1303 is a horizontal heat exchange pipe, is S-shaped, is arranged in a winding manner, and is buried in soil below the greenhouse, and the buried depth of the heat exchange pipe 1303 is preferably 2-4 m. Air outlet pipe 1304 is located in the planting row, and the height of the air outlet of air outlet pipe 1304 is the same as the height of the crop canopy, so that the air outlet directly acts on crops, and the normal growth conditions of the crops are guaranteed. The length of the heat exchange pipe 1303 is determined according to the heating load of the greenhouse.

Referring to fig. 7, in a preferred application embodiment, a plurality of sets of heat storage and release devices are arranged in a large-span greenhouse, each soil heat storage and release device comprises an air blower 1301, an air inlet pipeline 1302, a heat exchange pipeline 1303 and an air outlet pipeline 1304, each set of heat storage and release device is embedded every 6m underground in the large-span greenhouse, the air inlet pipelines 1302 are fixed at the upright posts 801 of the greenhouse, the air blowers 1301 connected with air inlets of the air inlet pipelines 1302 are located 50-100 cm below a ridge height 1307 at the top of the greenhouse, the heat exchange pipelines 1303 are in an S shape and are arranged in a winding manner, the length is determined according to the heating load of the greenhouse, the average operating efficiency of each set of devices is guaranteed to be more than 85%, and the devices are embedded under deep soil 1305 and the embedding depth is 2-4 m; air outlet pipe 1304 is located in the planting rows, the height of air outlet 1306 of air outlet pipe 1304 is identical to the height of the crop canopy, and the displaced heat directly acts on crops.

The following describes the built-in aerobic fermentation chamber of the present invention with reference to FIGS. 8 and 9:

referring to fig. 8, in the structure of the specific embodiment of the internal aerobic fermentation chamber of the present invention, the height of the fermentation chamber body is 0.6m, the width is 0.4m, the whole material of the fermentation chamber body is stainless steel plate, the upper part of the fermentation chamber body is provided with a material cavity 904, and the lower part is provided with a permeate cavity 907. An opening 909 is transversely arranged in the middle of the top of the fermentation bin body, and openable cover plates 903 are arranged on two sides of the opening 909, so that stacking of materials and obtaining of solid fertilizers are facilitated, the fermentation bin body is closed when heating measures are not adopted, and manual and mechanical operation is facilitated. The top of the fermentation chamber body is provided with a plurality of vent holes 902, and the vent holes 902 are positioned at both sides of the opening 909. The diameter of the top vent holes 902 is 0.2mm, the interval is 0.2m, the distance from the upper material cavity 904 to the bottom is 0.2m, the middle part is isolated by an 80-mesh filter screen 901, the filter screen 901 is made of 304 stainless steel wire meshes, and the wire diameter is 0.1 mm. The height of a lower-layer osmotic liquid cavity 907 is 0.2m, the side face of the lower-layer osmotic liquid cavity contains a vent 906, the top and the bottom of the side face of a fermentation cabin body with the diameter of 0.1m are respectively provided with sliding grooves 905, a side plate 908 capable of sliding along the sliding grooves 905 is arranged between the sliding grooves 905, the extraction of liquid fertilizers in the osmotic liquid cavity 907 is facilitated after composting is completed through the opening and closing of the side plate 908, and the material of the sliding grooves 905 is 10 inches of cold rolled steel.

Referring to fig. 9, in a preferred embodiment, an internal aerobic fermentation chamber 910 is disposed between the upright posts 801, and fertilizer, CO2 and heat generated by the internal aerobic fermentation chamber 910 can be timely acted on the growth of plants, thereby improving the production efficiency of the plants.

The following will specifically describe the heat-brewing air-replenishing device of the present invention with reference to fig. 10 and 11:

referring to fig. 10, the structure of the embodiment of the brewing and air-replenishing device of the present invention comprises a fermentation shed 1101, a fermentation area 1113, a heat-preserving device, a humidifying device, and a ventilating device. The fermentation shed 1101 is constructed of galvanized steel pipes. The fermentation zone 1113 is arranged in the middle of the fermentation shed 1101, wherein:

the ventilation device comprises an air inlet pipeline fan, an air inlet pipe 1106, an air outlet pipe 1107, an air outlet pipeline fan 1108 and a gas filtering device 1109, wherein the air inlet pipeline fan is connected with the air inlet pipe 1106, the air inlet pipe 1106 is arranged in the fermentation area 1113, the air outlet pipe 1106 is connected with the gas filtering device 1109 through the air outlet pipeline fan, and the air outlet pipe 1106 is arranged in the fermentation area 1113. In this embodiment, the intake pipe 1106 is a plurality of, and vertical setting is in fermentation zone 1113 side by side, and a plurality of intake pipes 1106 all communicate with the admission line, and the admission line is connected with the admission line fan, vertically is provided with a plurality of ventholes 1111 on the intake pipe 1106. The outlet duct 1107 is a plurality of, and vertical setting is in fermentation area 1113 side by side, and a plurality of outlet ducts 1107 all communicate with the pipeline of giving vent to anger, and the pipeline of giving vent to anger is connected with pipeline fan 1108, and gas filter 1109 adopts the gas filter bucket.

The humidifying device comprises a water inlet pipe 1104, a water diversion branch pipe 1105 and a nozzle connected with the water diversion branch pipe 1105, wherein the water inlet pipe 1104 is transversely arranged above the fermentation area 113, and the water diversion branch pipes 1105 are distributed on the water inlet pipe 1104 uniformly and communicated with the water inlet pipe 1104.

The heat preservation device comprises a fermentation heat preservation quilt 1102 and a heat preservation roller shutter 1103 capable of collecting the fermentation heat preservation quilt 1102, and the fermentation heat preservation quilt 1102 covers the fermentation area 1113. The fermentation heat preservation quilt 1102 is made of a plastic film and a foamed polyethylene material.

A waste liquid collecting tank 1110 is arranged at the bottom of the fermentation area 1113, and a filter screen is laid on the waste liquid collecting tank 1110.

Referring to fig. 11, in a preferred embodiment, the fermentation shed 1101 is arranged on the back side of the large-span greenhouse, the fermentation shed 1101 is constructed by galvanized steel pipes with the diameter of 32mm, the length of the fermentation shed is the same as that of the large-span greenhouse, the width of the fermentation shed is generally 7-10m, the ridge height of the fermentation shed 1101 is 2.5m, a front air opening with the height of 1m is reserved, and straws can be directly conveyed into the fermentation shed 1101 from the air opening of the large-span greenhouse, so that labor force is reduced. The fermentation area 1113 is positioned in the middle of the fermentation shed 1101, and the fermentation area 1113 is paved with heat insulation cotton and then paved with cement to reduce ground heat transfer; two waste liquid collecting grooves 1110 with the length of 30cm and the length of 30cm are arranged at the bottom of the fermentation area 1113 and used for recovering fermentation waste liquid generated by fermentation, and a steel filter screen is laid on the fermentation waste liquid to prevent raw materials from infiltrating downwards. The fermentation pile (straw) is piled on the fermentation area 1113, the heat preservation device is arranged outside the fermentation pile, the humidifying device is arranged at the top of the fermentation pile, and the ventilating device is arranged at the central position of the fermentation pile and enters the large-span greenhouse from the underground.

The heat preservation device mainly comprises a fermentation heat preservation quilt 1102 made of a plastic film and a foamed polyethylene material, the fermentation heat preservation quilt 1102 is covered and insulated after being stacked, and a heat preservation roller shutter 1103 is installed on the fermentation heat preservation quilt 1102, so that manual operation can be reduced. In winter and early spring cold season, when the fermentation heap body can not start because of the external low temperature, preheat for the fermentation heap body through the mode that midday noon in daytime opens the fermentation heat preservation quilt 1102 to this reaches the suitable ambient temperature of compost fermentation, accelerates the fermentation process.

The humidifying device comprises a water inlet pipe 1104, a water diversion branch pipe 1105, a nozzle connected with the water diversion branch pipe 1105 and a control valve, wherein the water inlet pipe 1104 is transversely arranged above the fermentation stack body. The inlet tube 1104 is connected the water inlet, places it on the fermentation heap body, evenly distributed branch water pipe 1105 on the inlet tube 1104 to be furnished with the shower nozzle, the switch of branch water pipe 1105 is divided in the control valve connection and control, and then adjusts the heap body moisture content, promotes the heap body and normally ferments.

Ventilation unit includes inlet line fan, intake pipe 1106, outlet duct 1107, outlet line fan 1108 and gas filter 1109, and diameter 160 mm's PVC pipeline is all selected for use to intake pipe 1106 and outlet duct 1107, and intake pipe 1106 is a plurality of, and vertical setting is in the middle of the fermentation heap body side by side, rises ground 1.6m by fermentation tank bed central point position, opens several venthole 1111 on intake pipe 1106, provides the required O of microorganism activity for the fermentation heap body₂. A plurality of air inlet pipes 1106 are all communicated with an air inlet pipeline which is buried underground by 1m and transversely enters into the groundInside the span greenhouse, the air inlet of the air inlet pipeline is connected with an air inlet pipeline fan in the large-span greenhouse 11, and the air inlet pipeline fan is used for connecting O in the large-span greenhouse₂Pumping to the fermentation stack body to provide the fermentation stack body with O required by microbial activity₂. Outlet duct 1107 is a plurality of, arrange with intake pipe 1106 parallel, a plurality of outlet ducts 1107 all communicate with outlet duct 1112, outlet duct 1112 buries in underground 1m in advance, transversely get into inside the large-span greenhouse, outlet duct fan 1108 and gas filter 1109 in the large-span greenhouse are connected to outlet of outlet duct 1112, gas filter 1109 is the gas filter bucket, the gas that the fermentation produced handles through the gas filter bucket, get rid of harmful gas in the gas, the required CO of crop growth discharges out₂. The air outlet pipeline fan 1108 adopts a negative pressure conveying mode to convey heat and CO in the fermentation body₂Pumping into a large-span greenhouse.

The present invention and the technical contents not specifically described in the above embodiments are the same as the prior art.

The above embodiments are only specific embodiments disclosed in the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention disclosed in the present invention should be subject to the scope of the claims.

Claims

1. A large-span greenhouse which is characterized in that: the large-span greenhouse comprises a greenhouse steel arch frame structure, a north wall double-layer heat insulation structure, a gable heat insulation structure, a stand column structure, a deep soil heat storage and release device, a heat brewing and air supplementing device and a built-in aerobic fermentation bin, wherein the greenhouse steel arch frame structure is connected with the north wall double-layer heat insulation structure, the gable double-layer heat insulation structure is arranged on two sides of the greenhouse steel arch frame structure and the north wall double-layer heat insulation structure, the greenhouse steel arch frame structure is supported through the stand column structure, the north wall double-layer heat insulation structure comprises an outer layer arch frame, an inner layer arch frame, a pull rod, a heat insulation quilt, a transverse pull pipe and an arch frame connecting plate, the outer layer arch frame and the inner layer arch frame are both arc-shaped, the inner layer arch frame is arranged on the inner side of the outer layer arch frame and connected through the pull rod, the top of the outer layer arch frame is connected with the top of the inner layer arch frame through the arch frame connecting plate, the bottom of the outer layer arch frame and the bottom of the inner layer arch frame are separately arranged, the outer layer arch centering and the inner layer arch centering are multiple, the outer layer arch centering and the inner layer arch centering are connected through a plurality of transverse pull pipes, heat preservation quilts cover the outer side of the outer layer arch centering and the outer side of the inner layer arch centering, the deep soil heat storage and release device is arranged in soil below the large-span greenhouse, the heat brewing and air supplementing device is arranged outside the large-span greenhouse, and the built-in aerobic fermentation chamber is arranged in the large-span greenhouse.

2. The large-span greenhouse of claim 1, wherein: the greenhouse steel arch structure comprises an arch upper chord, an arch lower chord, double arch clamps, a framework connecting plate, film clamping grooves and arch transverse pull pipes, wherein the arch upper chord and the arch lower chord are both arc-shaped, the arch lower chord is arranged on the inner side of the arch upper chord and is connected with the inner side of the arch upper chord through the double arch clamps, the top of the arch upper chord is connected with the top of the arch lower chord through the framework connecting plate, the bottom of the arch upper chord is connected with the bottom of the arch lower chord, the arch upper chord and the arch lower chord are multiple, the multiple arch upper chords are connected with each other through the multiple arch transverse pull pipes, the film clamping grooves are arranged on the outer side of the arch upper chord, the arch connecting plate is connected with the framework connecting plate, the gable heat-insulating structure comprises a main upright post, a secondary upright post, a transverse pull rod, a gable vertical face heat-insulating quilt and a sliding door, the main upright post is vertically arranged below the arch upper chord and the secondary upright post on the two sides of the composite greenhouse, the secondary upright post is multiple secondary upright posts, are positioned at the two sides of the main upright post and are respectively vertically arranged below the upper chord of the arch frame and the lower side of the outer layer arch frame at the two sides of the composite greenhouse, a transverse pull rod is arranged between the auxiliary upright post and the main upright post, a gable facade heat preservation quilt is arranged on the outer sides of the main upright post and the auxiliary upright post, a sliding door is arranged between the auxiliary upright posts below the outer layer arch centering, the upright post structure comprises upright posts, upright post transverse pull pipes, upright post transverse pull rods, upright post top inclined struts and scissor struts, the upright post is vertically arranged below the upper chord of the arch frame in the composite greenhouse, the top of the upright post is connected with the upper chord of the arch frame, the top parts of the plurality of upright posts are connected through upright post transverse pull pipes, the middle parts of the plurality of upright posts are connected through upright post transverse pull rods, the vertical column top inclined strut is arranged between the vertical column transverse pull tube and the vertical column, and the cross strut is arranged between the vertical column transverse pull tube and the vertical column transverse pull rod.

3. The large-span greenhouse of claim 2, wherein: the large-span greenhouse still includes two beam structure, two beam structure include upper beam, underbeam and upper and lower beam connecting piece, connect through upper and lower beam connecting piece between upper beam and the underbeam, upper and lower beam connecting piece sets up between bow member connecting plate and skeleton connecting plate, the upper and lower beam connecting piece upwards extends to outside the upper beam, constitutes the heat preservation and is prevented turning over the structure.

4. The large-span greenhouse of claim 3, wherein: the large-span greenhouse further comprises a foundation and embedded parts, wherein the foundation and the embedded parts comprise a plurality of greenhouse arch frame foundations and independent foundations, ring beam reinforcing ribs and a ring beam skeleton connecting embedded part are arranged on the greenhouse arch frame foundations, the outer layer arch frame bottom, the inner layer arch frame bottom, the arch frame upper chord bottom and the arch frame lower chord bottom are respectively connected with the embedded parts through the ring beam reinforcing ribs and the ring beam skeleton connecting embedded part and are arranged on the greenhouse arch frame foundations, the independent foundations are provided with reinforcing ribs and independent foundation upright post connecting embedded parts, and the upright post bottoms are arranged on the independent foundations through the reinforcing ribs and the independent foundation upright post connecting embedded parts.

5. The large-span greenhouse of claim 2, wherein: the heat storage and release device comprises an air blower, an air inlet pipeline, a heat exchange pipeline and an air outlet pipeline, wherein the air inlet pipeline is connected with the air outlet pipeline through the heat exchange pipeline, the air inlet pipeline is fixed on the stand column and is connected with an air inlet of the air inlet pipeline, the air blower is located 50-100 cm below the ridge height of the top of the large-span greenhouse, the heat exchange pipeline is a horizontal heat exchange pipeline, the heat exchange pipeline is arranged in an S shape and is buried in soil below the large-span greenhouse, the buried depth of the heat exchange pipeline is 2-4 m, the air outlet pipeline is located in a planting row in the large-span greenhouse, and the height of an air outlet of the air outlet pipeline is consistent with the height of a crop canopy.

6. The large-span greenhouse of claim 2, wherein: the built-in aerobic fermentation bin comprises a fermentation bin body, the upper part in the fermentation bin body is provided with a material cavity, the lower part is provided with a permeate cavity, the material cavity and the osmotic liquid cavity are separated by a filter screen, an opening is transversely arranged in the middle of the top of the fermentation cabin body, the two sides of the opening are provided with cover plates which can be opened and closed, the top and the bottom of the side surface of the fermentation bin body are respectively provided with a sliding chute, a side plate which can slide along the sliding grooves is arranged between the sliding grooves, a plurality of vent holes are arranged at the top of the fermentation bin body, the vent holes are positioned at two sides of the opening, the diameter of each vent hole is 0.2mm, the interval is 0.2m, a vent is arranged on the side surface of the osmotic liquid cavity, the diameter of the vent is 0.1m, the fermentation bin body, the cover plate and the side plate are all made of stainless steel materials, the filter screen is 304 stainless steel wire meshes, the diameter of the wire is 0.1mm, and the filter screen is an 80-mesh filter screen.

7. The large-span greenhouse of claim 2, wherein: the brewing gas supplementing device comprises a fermentation area, a humidifying device is arranged above the fermentation area, a ventilating device is arranged in the fermentation area, the ventilating device comprises a gas inlet pipeline fan, a gas inlet pipeline, a gas outlet pipeline fan and a gas filtering device, the gas inlet pipeline fan is connected with the gas inlet pipeline, the gas inlet pipeline is arranged in the fermentation area, a plurality of gas inlet pipelines are vertically arranged in the fermentation area side by side and are communicated with the gas inlet pipeline, the gas inlet pipeline is connected with the gas inlet pipeline fan, a plurality of gas outlet holes are vertically arranged on the gas inlet pipeline, the gas outlet pipeline is connected with the gas filtering device through the gas outlet pipeline fan, the gas outlet pipeline is arranged in the fermentation area, a plurality of gas outlet pipelines are vertically arranged in the fermentation area side by side and are communicated with the gas outlet pipeline, and the gas outlet pipeline is connected with the gas outlet pipeline fan, humidification device includes inlet tube, branch pipe and the shower nozzle of being connected with branch pipe, the inlet tube transversely sets up in the fermentation district top, branch pipe is a plurality of, and the equipartition is on the inlet tube to communicate with the inlet tube, the heat preservation air supplement unit still includes heat preservation device, heat preservation device includes the fermentation heat preservation by and can be with the heat preservation book curtain ware that keeps warm by packing up, the fermentation heat preservation is covered on the fermentation district, the fermentation district bottom is provided with the waste liquid collecting vat, lay the filter screen on the waste liquid collecting vat, the fermentation district outside is provided with the fermentation canopy, humidification device, ventilation unit and heat preservation device all set up in the fermentation canopy.

8. The large-span greenhouse of any one of claims 2 to 7, wherein: the improved skylight opening and closing device is characterized in that a top vent is arranged above the upper chord of the arch frame, a skylight capable of being opened and closed is arranged on the top vent, a skylight opening and closing device is connected to the skylight, the skylight opening and closing device comprises a speed reducer, a rack, a transmission shaft and a gear, the speed reducer is arranged on the upper chord of the arch frame below the skylight, the speed reducer is connected with the gear through the transmission shaft, the gear is meshed with the rack, the upper end of the rack is connected with the skylight, a bottom vent is arranged below the upper chord of the arch frame, a window covering layer and an electric film winder capable of winding and unwinding the window covering layer are arranged on the bottom vent, and the window covering layer is composed of an outer PO film and an inner-layer insect-proof net.

9. The large-span greenhouse of claim 7, wherein: stairs and handrails are arranged above the upper chord of the arch frame on the side surface of the large-span greenhouse, and the handrails are arranged on the outer side of the stairs.

10. The large-span greenhouse of claim 8, wherein: the total length of the large-span greenhouse is 80-200 m, the span is 16.8m, the height of the greenhouse ridge is 7m, and the span of the greenhouse steel arch frame structure is larger than that of a double-layer heat insulation structure of a north wall.