CN114747402B

CN114747402B - Large-span greenhouse

Info

Publication number: CN114747402B
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: 2023-04-28
Anticipated expiration: 2042-03-01
Also published as: CN114747402A

Abstract

The invention relates to a large-span greenhouse, which comprises a greenhouse steel arch structure, a double-layer north wall heat-insulating structure, a gable heat-insulating structure, a column structure, a deep soil heat-accumulating and releasing device, a brewing and heating device and a built-in aerobic fermentation cabin. The invention adopts a large-span layout, improves the land utilization rate, and is convenient for mechanized operation; meanwhile, the double-layer heat preservation structure of the biological brewing heat and underground deep heat storage and release system and the rear wall improves the heat preservation 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 layered endlessly; in the wall structure, many greenhouses still use brick walls and earth walls as back walls and gable structures at present, and the wall has good heat insulation performance, but the civil engineering quantity is quite large, and the construction cost is higher.

On the steel arch, truss structures are used for improving the safety of the greenhouse, and the truss structures consume huge steel, have high welding cost and long construction period; if the single-chord arch is used, the number of the upright posts in the greenhouse can be increased to improve the stability of the greenhouse structure, and the method is more unfavorable for mechanical operation.

Sunlight greenhouse and plastic greenhouse are the main facilities for producing fresh vegetables in China, so that the problem of difficult vegetable eating in winter in northern areas is solved, the yield of vegetables and fruits in south and north is greatly improved, good social and economic benefits are brought, and more peasants are brought to home enrichment. The large-span sunlight greenhouse, the large-span greenhouse and the large-span greenhouse improve a plurality of defects of the prior structure, but the prior art still has the following defects:

1) The existing sunlight greenhouse is light-shading due to the fact that the height of the rear wall is too high, the distance between the greenhouse is large, land is wasted, and the land utilization rate is still low.

2) The sunlight greenhouse has high construction cost, and the wall structure always has a large specific gravity.

3) The ventilation form of the greenhouse and the sunlight greenhouse is easy to form a water drum, and the structure and the indoor crop growth are influenced.

4) Compared with a sunlight greenhouse, the greenhouse structure has weaker wind and snow load resistance and is easy to generate structural weakness.

5) No additional heating and cooling device is used to influence the growth of indoor crops.

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

In winter and spring in north, the greenhouse has certain heat preservation and storage capacity, but the temperature in the greenhouse is still too low, and CO is still present ₂ Insufficient conditions ultimately affect the yield and quality of the crop. The aerobic fermentation utilizes the life metabolism of microorganisms to carry out biodegradation and synthesis process on organic solid wastes under the aerobic condition, and finally, a stabilized high-quality product is produced, and heat, carbon dioxide and water are produced. The aerobic fermentation can generate high temperature of 60-70 ℃ under proper conditions, although a lot of researches on heat recovery and utilization are carried out, the researches on the combination of the aerobic fermentation and the heat generation under the condition of not affecting the cultivation area are not much, and most of the researches at present mainly aim at the treatment of harmful gases of the aerobic fermentation and do not produce CO on the harmful gases of the aerobic fermentation ₂ Intensive studies have been carried out in connection with cultivation.

Disclosure of Invention

In order to solve the technical problems in the background technology, the invention provides a large-span greenhouse, which adopts a 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 preservation structure improves the heat preservation performance of the greenhouse and is beneficial to the production of overwintering vegetables.

The technical scheme 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 structure, a north wall double-layer heat preservation structure, a gable heat preservation structure and a column structure, wherein a heat storage and release device, a heating air supplementing device and a built-in aerobic fermentation bin are arranged on the two sides of the greenhouse steel arch structure and the north wall double-layer heat preservation structure, the gable heat preservation structure is supported by the column structure, the north wall double-layer heat preservation structure comprises an outer arch, an inner arch, a pull rod, a heat preservation quilt, a transverse pulling pipe and an arch connecting plate, the outer arch and the inner arch are arc-shaped, the inner arch is arranged on the inner side of the outer arch and connected through the pull rod, the top of the outer arch is connected with the top of the inner arch through the arch connecting plate, the bottom of the outer arch and the bottom of the inner arch are separately arranged, the outer arch and the inner arch are all multiple, the outer arches and the inner arches are connected through the transverse pulling pipes, the outer arch and the inner arch are covered with the quilt, the heat storage device is arranged below the soil under the large-span, and the large-span greenhouse air supplementing device is arranged outside the large-span fermentation bin, and the large-span greenhouse is arranged outside the large-span greenhouse.

Further, the greenhouse steel arch structure includes the arch upper chord, the arch lower chord, the double arch clamps, the skeleton connecting plate, card membrane groove and the arch tie pipe, the arch upper chord is arc with the arch lower chord, the arch lower chord sets up in the arch upper chord inboard, connect through double arch clamps between, arch upper chord top and arch lower chord top pass through the skeleton connecting plate and connect, arch upper chord bottom and arch lower chord bottom connect, arch upper chord and arch lower chord are a plurality of, connect through a plurality of arch tie pipes between a plurality of arch upper chords, arch upper chord outside is provided with card membrane groove, the arch connecting plate is connected with the skeleton connecting plate, the gable insulation structure includes the main part, vice stand, the transverse pull rod, gable elevation insulation quilt and push-and-pull door, the main part is vertical to be set up in the arch upper chord below of compound greenhouse both sides, vice stand is a plurality of, be located the main part both sides, respectively vertical setting is put in the upper chord below and outer layer of the arch lower chord below of compound greenhouse, be provided with vice stand and main stand, be provided with the transverse support, be provided with the cross-tie between the side stand and the side stand, be provided with the cross-tie, be provided with the cross-bar between the side stand and the side stand, be provided with the cross-tie, be provided with the side stand is provided with the cross-bar, be provided with the cross-tie between the side stand and the side stand, be provided with the cross-bar, be provided with the cross-tie between the side stand and the side stand.

Further, the large-span greenhouse also comprises a double-beam structure, the double-beam structure comprises an upper beam, a lower beam and an upper beam connecting piece and a lower beam connecting piece, the upper beam and the lower beam are connected through the upper beam connecting piece and the lower beam connecting piece, the upper beam connecting piece and the lower beam connecting piece are arranged between an arch frame connecting plate and a skeleton connecting plate, and the upper beam connecting piece and the lower beam connecting piece extend upwards to the outside of the upper beam to form a heat preservation quilt overturn preventing structure.

Further, the large-span greenhouse further comprises a foundation and embedded parts, wherein the foundation and embedded parts comprise a plurality of greenhouse arch foundations and independent foundations, ring beam reinforcement and ring beam framework connection embedded parts are arranged on the greenhouse arch foundations, the outer arch bottom, the inner arch bottom, the arch upper chord bottom and the arch lower chord bottom are respectively arranged on the greenhouse arch foundations through ring beam reinforcement and ring beam framework connection embedded parts, reinforcement and independent foundation upright post connection embedded parts are arranged on the independent foundations, and the upright post bottoms are arranged on the independent foundations through reinforcement and independent foundation upright post connection embedded parts.

Further, hold exothermic assembly and include air-blower, air inlet duct, heat exchange pipeline and go out the pipeline, the air inlet duct passes through the heat exchange pipeline and is connected with the pipeline of giving vent to anger, the air inlet duct is fixed in on the stand, the air-blower is connected with the air inlet of air inlet duct, the air-blower is located the high below of large-span greenhouse top ridge 50-100 cm position department, the heat exchange pipeline is horizontal heat exchange pipeline, the heat exchange pipeline is the S type and arranges, the heat exchange pipeline buries in the soil of large-span greenhouse below, heat exchange pipeline buries 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 of pipeline and highly unanimous with crop canopy.

Further, the built-in aerobic fermentation storehouse comprises a fermentation storehouse body, the upper part in the fermentation storehouse body is provided with the material chamber, the lower part is provided with the infiltration liquid chamber, separate through the filter screen between material chamber and the infiltration liquid chamber, transversely be provided with the opening in the middle of the fermentation storehouse body top, the opening both sides are provided with the apron that can open and shut, fermentation storehouse body side top and bottom are provided with the spout respectively, be provided with the curb plate that can follow the spout slidable between the spout, fermentation storehouse body top is provided with a plurality of air vents, the air vent is located the opening both sides, the air vent diameter is 0.2mm, interval 0.2m, the infiltration liquid chamber side is provided with the vent, vent diameter 0.1m, fermentation storehouse body, apron and curb plate are made by stainless steel material, the filter screen is 304 stainless steel wire net, the wire footpath is 0.1mm, the filter screen is 80 mesh.

Further, make hot air supplement unit includes the fermentation zone, fermentation zone top is provided with humidification device, be provided with ventilation unit in the fermentation zone, ventilation unit includes the admission line fan, the intake pipe, the outlet duct, the outlet line fan and gas filtering device, admission line fan and intake-tube connection, the intake pipe sets up in the fermentation zone, the intake pipe is a plurality of, vertical setting side by side is in the fermentation zone, a plurality of intake pipes all communicate with the intake pipe, the intake pipe is connected with the intake line fan, vertically be provided with a plurality of ventholes in the intake pipe, the outlet duct passes through the outlet line fan and is connected with gas filtering device, the outlet duct sets up in the fermentation zone, the outlet duct is a plurality of, vertical setting side by side is in the fermentation zone, a plurality of outlet ducts all communicate with the outlet duct, the outlet duct is connected with the outlet duct fan, humidification device includes the inlet tube, branch pipe and the shower nozzle with branch pipe connection, the inlet tube transversely sets up in the fermentation zone top, the branch pipe is a plurality of, and the equipartition is on the inlet tube, and communicate with the inlet tube, make hot air supplement unit still includes the heat preservation quilt and can be packed up the heat preservation quilt, the heat preservation quilt covers in the fermentation canopy, the fermentation canopy is covered in the fermentation canopy, the fermentation canopy is provided with heat preservation and fermentation canopy is set up in the fermentation canopy, the fermentation canopy is set up in the fermentation canopy has a heat preservation device, the fermentation canopy is provided with heat preservation device, the fermentation canopy is placed in the fermentation canopy has a waste liquid, the heat preservation device is placed in the fermentation canopy has a waste liquid, the waste heat preservation device, the fermentation device has a waste heat storage device, fermentation device has a waste heat storage device, fermentation has fermentation has a waste heat.

Further, 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 rolling device capable of winding and unwinding the window covering layer are arranged on the bottom vent, and the window covering layer consists of an outer-layer PO film and an inner-layer insect-proof net.

Further, a stair and a handrail are arranged above the upper chord of the arch frame on the side face of the large-span greenhouse, and the handrail is arranged outside the stair.

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

The invention provides a large-span greenhouse, which is mainly used for producing vegetables, wherein the total length of the greenhouse is prolonged by 80-200 m, the span is 16.8m, the ridge height is 7m, and the east, west and north three-sided wall bodies are of a heat-insulating material composite double-layer wall body structure; the greenhouse structure comprises a greenhouse main body, a heat-insulating structure, a ventilation structure, earhouses and stairs, wherein the greenhouse main body is composed of a steel arch frame, a transparent covering material and a heat-insulating material, and the transparent covering material covers the surface of the steel arch frame; the heat preservation structure includes back roofing double-deck heat preservation cover, and thing side gable double-deck heat preservation knot ventilation structure includes bottom ventilation and top ventilation. The invention therefore has the following specific advantages:

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

2) The steel arch frame is connected with the bolt embedded part in a screwed mode, the horizontal pulling pipe is connected with the upper chord of the arch frame in a clamping piece connecting mode, and the upright post is connected with the bolt embedded part in a screwed mode.

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

4) The built-in aerobic fermentation bin adopts a double-layer double-cavity solid-liquid separation structure, heats plant root system soil by utilizing heat generated in the fermentation process, and is provided with the vent holes at the top, so that CO2 emission is facilitated, the photosynthesis efficiency of plants is improved, and fertilizer generated by the fermentation bin can timely act on the growth of the plants, and the production efficiency of the plants is improved.

5) The heat generated by the device is utilized by aerobic fermentation to solve the problems of low temperature and CO of a large-span greenhouse in winter ₂ Deficiency of the blood. At the same time recycle O in the greenhouse ₂ Providing a favorable environment for microorganisms in aerobic fermentation of the heap, finally realizing carbon neutralization and carbon emission, having simple operation and small investment, being arranged outside a greenhouse without occupying a planting area, increasing planting area, improving economic benefit and being capable of utilizing O in the greenhouse ₂ Heat and CO inside the stack ₂ Replacement is carried out, and O required by the pile body is satisfied ₂ At the same time, can also provide heat and CO for the growth of plants for the greenhouse ₂ Therefore, the crop yield is improved, the economic benefit is increased, the heat-insulating material can be started to be preheated by utilizing the external illumination in the middle noon at the initial stage of fermentation, and a proper temperature environment is provided for the fermentation pile body so as to promote the aerobic fermentation process.

5) According to the invention, a set of deep heat storage and release device is buried every 6m underground of a large-span greenhouse, the air inlet pipeline is fixed at a greenhouse upright post, the air blower connected with the air inlet is positioned at a position 50-100 cm below the ridge height at the top of the greenhouse, the heat exchange pipelines are arranged in a winding manner, the length is determined according to the heating load of the greenhouse, the running average efficiency of the single set of device is ensured to be more than 85%, the air outlet pipeline is positioned in a planting row, the air outlet height of the air outlet pipeline is consistent with the height of a crop canopy, the indoor ground temperature and the air temperature can be remarkably 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 a traditional sunlight greenhouse, the land utilization rate and the construction cost of the heat storage and release device for the greenhouse can be scientifically and reasonably determined, the service life is long, the manufacturing cost is low, and the vegetable yield and the income can be realized. And the system can also operate according to control strategies such as temperature control, time control and the like.

Drawings

FIG. 1 is a schematic diagram of the structure 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 reinforcement arch of the present invention;

FIG. 4 is a schematic structural view of the column structure and the 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 diagram of a heat accumulating and releasing device according to the present invention;

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

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

FIG. 9 is a schematic illustration of the use of the built-in aerobic fermentation chamber of the present invention;

FIG. 10 is a schematic diagram of a thermal air make-up device according to the present invention;

FIG. 11 is a schematic diagram of the application of the hot air supply device of the present invention.

The reference numerals are explained as follows:

101. winding an arch frame; 102. the arch centering horizontally pulls the pipe; 103. a clamping film groove; 104. the arch centering is lower chord; 105. a double arch clip; 106. a skeleton connecting plate;

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

301. an electric film rolling device; 302. a window covering layer;

401. an outer arch; 402. an inner arch; 403. a heat preservation quilt; 404. a pull rod; 405. a tube is pulled horizontally; 406. an arch frame connecting plate;

501. a main column; 502. an auxiliary upright post; 503. a transverse pull rod; 504. gable elevation heat preservation quilt; 505. a sliding door;

601. A girder is arranged; 602. a lower beam; 603. an upper and lower beam connecting member;

7. an anti-overturning structure of the heat preservation quilt;

801. a column; 802. the upright post transversely pulls the pipe; 803. a column transverse pull rod; 804. diagonal bracing is arranged at the top of the upright post; 805. a scissors support;

901. a filter 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. and a built-in aerobic fermentation bin.

1001. Arch foundation around the greenhouse; 1002. water is dispersed outside the periphery of the greenhouse; 1003. gable and north wall inner arch foundation; 1004. an independent foundation; 1005. reinforcing bars; 1006. a collar Liang Peijin; 1007. the framework at the ring beam is connected with an embedded part; 1008. the stand column at the independent foundation is connected with the embedded part;

1101. fermenting shed; 1102. fermenting the heat preservation quilt; 1103. a thermal insulation curtain rolling device; 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 collection tank; 1111. an air outlet hole; 1112. an air outlet pipe; 1113. and a fermentation zone.

1201. Stairs; 1202. an armrest.

1301. A blower; 1302. an air intake duct; 1303. a heat exchange pipeline; 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 attached drawings and to specific examples:

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

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

the double-layer heat preservation structure of the north wall comprises an outer arch 401, an inner arch 402, a pull rod 404, a heat preservation quilt 403, a horizontal pulling pipe 405 and an arch connecting plate 406, wherein the outer arch 401 and the inner arch 402 are arc-shaped, the inner arch 402 is arranged on the inner side of the outer arch 401, the outer arch 401 is 80mm by 40mm and 3.0mm hot galvanizing flat oval pipes, the inner arch 402 is 70mm by 30mm and 2.0mm hot galvanizing flat oval pipes, the inner arch 402 and the outer arch 401 are connected through the pull rod 404, the top of the outer arch 401 and the top of the inner arch 402 are connected through the arch connecting plate 406, the bottom of the outer arch 401 and the bottom of the inner arch 402 are separately arranged, the outer arch 401 and the inner arch 402 are all in a plurality, the outer arches 401 and the inner arches 402 are all connected through a plurality of horizontal pulling pipes 405, the horizontal pulling pipe 405 is DN20 hot galvanizing steel pipe of 2.75mm, and the outer side of the outer arch 401 and the outer arch 402 are all covered with the heat preservation quilt 403. The distance between the two wall foundations formed by the outer 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 50mm collodion heat preservation quilts or other heat preservation quilts. The arch connecting plates 406 are 10mm thick connecting steel plates.

The gable thermal insulation structure comprises a main column 501, auxiliary columns 502, transverse pull rods 503, gable elevation thermal insulation quilt 504 and a sliding door 505, wherein the main column 501 is vertically arranged below the upper chord 101 of the arch frame at two sides of the composite greenhouse, the auxiliary columns 502 are arranged at two sides of the main column 501 and are respectively vertically arranged below the upper chord 101 of the arch frame at two sides of the composite greenhouse and below the outer arch frame 401, the transverse pull rods are arranged between the auxiliary columns 502 and the main column 501, the gable elevation thermal insulation quilt 504 is arranged at the outer sides of the main column 501 and the auxiliary columns 502, and the sliding door 505 is arranged between the auxiliary columns 502 at the lower side of the outer arch frame 401. The specification of the sliding door 505 is 2.0mm by 2.2m, and a small door of 1.0 mm by 1.8m is arranged on the door and is used for daily work in and out, and the gable elevation heat preservation quilt 504 is a 100mm glue-spraying cotton heat preservation quilt or other heat preservation quilts. The main upright post 501, the auxiliary upright post 502 and the transverse pull rod 503 are all 40mm x 2.75mm hot dip galvanized square steel; the gable insulation structure is formed by an outer arch 401 on the outer side, an arch upper chord 101, 1 main upright post 501, 9 auxiliary upright posts 502 and 6 transverse pull rods 503 in the embodiment.

The eastern, western and north three-sided wall bodies of the invention are all heat insulation material composite wall body structures.

The stair 1201 is arranged above the upper chord 101 of the arch frame on the side surface of the composite greenhouse, two galvanized steel pipes with DN25 thickness of 2.75mm are welded on the upper chord 101 of the arch frame, and armrests 1202 with the height of 0.6m are arranged on the outer side, wherein the material of each armrest 1202 is the galvanized steel pipe with DN20 thickness of 2.0 mm.

The greenhouse steel arch structure in the embodiment of the invention adopts a mode of alternately arranging the common arch frames G1 and the reinforcing arch frames G2, wherein the common arch frames G1 are longitudinally arranged at intervals of 1m, and the reinforcing arch frames G2 are arranged at intervals of 6 m.

Referring to fig. 2, the general arch G1 includes an arch upper chord 101, an arch horizontal pull pipe 102, and a card film slot 103; the upper arch chord 101 is arc-shaped and made of a bent hot galvanized flat oval steel pipe, the top of the upper arch chord 101 is connected with an arch connecting plate 406 through an upper beam connecting piece 603 and a lower

beam connecting piece

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

Referring to fig. 3, the reinforcing arch G2 includes an arch upper chord 101, an arch cross-drawn tube 102, a card film slot 103, an arch lower chord 104, a double arch card 105, and a skeletal web 106; the upper arch chord 101 and the lower arch chord 104 are arc-shaped, the upper arch chord 101 is a bent hot galvanized flat oval steel pipe, the lower arch chord 104 is a hot galvanized round pipe, the lower arch chord 104 is arranged on the inner side of the upper arch chord 101 and is connected through a double arch clamp 105, the upper end of the double arch clamp 105 is in threaded connection with the upper arch chord 101, and the lower end of the double arch clamp 105 is in threaded connection with the lower arch chord 104; 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 beam connecting piece 603, the bottom of the upper arch chord 101 and the bottom of the lower arch chord 104 are also connected through a framework connecting plate, the framework connecting plate is used for being in threaded connection with embedded parts, the upper arch chord 101 and the lower arch chord 104 are all multiple, the upper arch chords 101 are connected through a plurality of arch wire transverse pull pipes 102, the arch wire transverse pull pipes 102 are hot dip galvanized steel pipes with the thickness of 2.75mmDN32, and the hot dip galvanized steel pipes are connected to the upper arch chord 101 through clamping pieces. The upright post 801 is vertically arranged below the upper chord 101 of the arch frame and is positioned at the position of 1.5m of the highest point of the composite greenhouse and used for supporting the reinforced arch frame G2. The skeletal connecting plates 106 are 10mm thick connecting steel plates.

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

the top vent sets up in the bow member top of string 101 top, is provided with the skylight 205 that can open and shut on the top vent, and skylight 205 has connect the skylight device that opens and shuts, and the skylight device that opens and shuts includes speed reducer 201, rack 202, transmission shaft 203 and gear 204, and speed reducer 201 sets up on the bow member top of string 101 of skylight below, and speed reducer 201 passes through transmission shaft 203 and is connected with gear 204, and gear 204 meshes with rack 202, and rack 202 upper end is connected with skylight 205. The rack 202 is driven to move up and down by the speed reducer 201, so that the automatic opening and closing of the skylight 205 is realized. The outer covering material of the skylight 205 is PO film, insect-proof net is arranged at the window, and wire netting is laid under the PO film to prevent water accumulation.

The bottom ventilation is arranged below the upper chord 101 of the arch frame, a window covering layer 302 and an electric film winding device 301 capable of winding and unwinding 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 an upper beam connecting piece 603, wherein the upper beam 601 is 80mm by 40mm by 2.75mm of hot dip galvanized square steel, the lower beam 602 is 40mm by 2.75mm of hot dip galvanized square steel, the double-beam spacing is 0.53m, the upper beam and the lower beam are connected by the upper beam connecting piece 603 every 1m, and the upper beam connecting piece 603 and the lower beam connecting piece 603 are 40mm by 2.75mm of hot dip galvanized square steel; the upper and lower beam connecting pieces 603 are arranged between the arch frame connecting plates 406 and the skeleton connecting plates 106, and the upper and lower beam connecting pieces 603 lengthen one square steel by 0.4m every 6m to form the heat preservation quilt anti-overturning 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 pipes 803, upright post top inclined struts 804 and scissor supports 805, wherein the upright posts 801 are vertically arranged below an arch upper chord 101 in a composite greenhouse, the tops of the upright posts 801 are connected with the arch 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 pipes 803, and 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 scissors stay 805 is provided between the column transverse stay 802 and the column transverse stay 803. The column transverse pull tube 802 and the column transverse pull rod 803 are 40mm by 2.5mm hot dip galvanized square steel.

The upright 801 is moved by 1.5m from the height of the ridge, and an upright transverse pulling pipe 802 is arranged between the top end of the upright 801 and the north wall inner arch 402.

In this embodiment, one column 801 is arranged every 6m, a column transverse pulling pipe 802 is arranged at the joint of the top of the column 801 and the upper chord 101 of the arch, and a column transverse pulling rod 803 is arranged at the position of the column 801 2.5m above the ground, so that the design of the transverse pulling structure improves the structural stability of the greenhouse on one hand, and does not affect the production operation at the height of 2.5m on the other hand, and can be used for hanging a light supplementing lamp, a spraying system or for hanging the plant vine.

Referring to fig. 5, the foundation and embedded part of the present invention comprises a plurality of greenhouse arch foundations and independent foundations 1004, ring beam reinforcement 1006 and ring beam skeleton connection embedded parts 1007 are arranged on the greenhouse arch foundations, the bottoms of the outer arches 401, the bottoms of the inner arches 402, the bottoms of the upper arches 101 and the bottoms of the lower arches 104 are respectively arranged on the greenhouse arch foundations through the ring beam reinforcement 1006 and the ring beam skeleton connection embedded parts 1007, reinforcement 1005 and independent foundation upright post connection embedded parts 1008 are arranged on the independent foundations 1004, and the bottoms of the upright posts 801 are arranged on the independent foundations 1004 through the reinforcement 1005 and the independent foundation upright post connection embedded parts 1008.

In this embodiment, the greenhouse arch foundation is divided into a greenhouse outer side arch foundation 1001 around the greenhouse and a gable and north wall inner side arch foundation 1003, the greenhouse outer side water scattering 1002 around the greenhouse is arranged outside the greenhouse outer side arch foundation 1001, the bottom of the outer arch 401, the bottom of the upper arch chord 101 and the bottom of the lower arch chord 104 are respectively arranged on the greenhouse outer side arch foundation 1001 through ring beam reinforcement 1006 and ring beam skeleton connection embedded parts 1007, and the bottom of the inner side arch 402 is arranged on the gable and north wall inner side arch foundation 1003 through ring beam reinforcement 1006 and ring beam skeleton connection embedded parts 1007.

The ring beam skeleton connecting embedded part 1007 and the independent foundation column connecting embedded part 1008 are of bolt structures and are used for being screwed with the arch and the column, and the ground anchor embedded part is buried in the middle of the adjacent ring beam skeleton connecting embedded part 1007 and is used for tying and pressing a film rope.

The foundation depth of the greenhouse arch is 0.91m, the greenhouse arch comprises a 150mm thick gray soil cushion layer from bottom to top, and the tamping coefficient is more than 0.95; a 1-layer 37 brick foundation, an 11-layer 24 brick foundation; the ring beam reinforcement 1006 is a C20 ring beam with the thickness of 240 mm;

the independent foundation 1004 is 0.9m deep and comprises a 150mm thick gray soil cushion layer from bottom to top, and the tamping coefficient is more than 0.95;50mm thick 700mm c20 concrete piers; 500mm thick 600mm 500mm c20 concrete piers; the reinforcement 1005 is a C20 ring beam with the thickness of 240 mm;

the skeleton connection embedded part 1007 at the ring beam is formed by 150mm 10mmQ235 steel plates with 150mm thickness and 4 pieces of 250mm length

Welding reinforcing steel bars; the stand column connecting embedded part 1008 of the independent foundation consists of 150mm of 10mmQ235 steel plates with 150mm of thickness and 4 pieces of 530mm of length>

And (5) welding reinforcing steel bars.

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

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

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

referring to fig. 6, the heat accumulating and releasing device of the present invention includes 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 greenhouse upright 801. The blower 1301 is located 50-100 cm below the top ridge height 1307 of the greenhouse. The heat exchange pipes 1303 are horizontal heat exchange pipes, are S-shaped and are distributed in a winding manner, and are buried in soil below the greenhouse, and the buried depth of the heat exchange pipes 1303 is preferably 2-4 m. The air outlet pipeline 1304 is positioned in the planting row, the height of the air outlet pipeline 1304 is consistent with the height of the crop canopy, and the air outlet pipeline 1304 directly acts on crops to ensure the normal growth condition of the crops. The length of the heat exchanging pipe 1303 is determined according to the heating load of the greenhouse.

Referring to fig. 7, in a preferred application embodiment, a plurality of heat accumulating and releasing devices are arranged in a large-span greenhouse, each soil heat accumulating and releasing device comprises an air blower 1301, an air inlet pipeline 1302, a heat exchange pipeline 1303 and an air outlet pipeline 1304, one heat accumulating and releasing device is buried every 6m under the large-span greenhouse, the air inlet pipeline 1302 is fixed at a column 801 of the greenhouse, the air blower 1301 connected with an air inlet of the air inlet pipeline 1302 is positioned at a position 50-100 cm below a ridge height 1307 at the top of the greenhouse, the heat exchange pipelines 1303 are arranged in an S shape, the arrangement is serpentine, the length is determined according to the heating load of the greenhouse, the running average efficiency of a single set of devices is ensured to be more than 85%, and the single set of heat accumulating and releasing devices are buried under deep soil 1305, and the buried depth is 2-4 m; the air outlet pipeline 1304 is positioned in the planting row, the height of the air outlet 1306 of the air outlet pipeline 1304 is consistent with the height of the crop canopy, and the replaced heat directly acts on the crop.

The following will specifically describe the built-in aerobic fermentation chamber of the present invention with reference to fig. 8 and 9:

referring to fig. 8, in the structure of the embodiment of the built-in aerobic fermentation chamber, the whole fermentation chamber body is made of stainless steel plates with the height of 0.6m and the width of 0.4m, a material cavity 904 is arranged at the upper part of the fermentation chamber body, and a penetrating fluid cavity 907 is arranged at the lower part of the fermentation chamber body. An opening 909 is transversely arranged in the middle of the top of the fermentation bin body, and cover plates 903 capable of being opened and closed are arranged on two sides of the opening 909, so that stacking of materials and acquisition of solid fertilizer are facilitated, and the fermentation bin body is closed when heating measures are not adopted, and is convenient for people and mechanical operation. The top of the fermentation chamber body is provided with a plurality of vent holes 902, and the vent holes 902 are positioned on two sides of an opening 909. Wherein the diameter of the vent holes 902 at the top is 0.2mm, the interval is 0.2m, the distance between the upper material cavity 904 and the bottom is 0.2m, the middle is isolated by a 80-mesh filter screen 901, the filter screen 901 is made of 304 stainless steel wire mesh, and the wire diameter is 0.1mm. The lower permeate cavity 907 is 0.2m high, the side contains a vent 906, the top and the bottom of 0.1m fermentation storehouse body side of diameter are provided with spout 905 respectively, be provided with between the spout 905 and follow the gliding curb plate 908 of spout 905, through the opening and shutting of curb plate 908, be convenient for compost accomplish the back, permeate cavity 907 in liquid fertilizer's extraction, spout 905 material is 10 cun cold steel pricks.

Referring to fig. 9, in a preferred application embodiment, a built-in aerobic fermentation bin 910 is arranged between the upright posts 801, and fertilizer, CO2 and heat generated by the built-in aerobic fermentation bin 910 can timely act on the growth of plants, so that the production efficiency of the plants is improved.

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

referring to fig. 10, the structure of the embodiment of the brewing and air supplementing device of the present invention includes a fermentation shed 1101, a fermentation area 1113, a heat preservation device, a humidifying device and a ventilation device. The fermentation shed 1101 is constructed from galvanized steel pipe.

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, a plurality of air inlet pipes 1106 are vertically arranged in the fermentation area 1113 side by side, the plurality of air inlet pipes 1106 are all communicated with an air inlet pipeline, the air inlet pipeline is connected with an air inlet pipeline fan, and a plurality of air outlet holes 1111 are vertically arranged on the air inlet pipe 1106. The outlet pipes 1107 are multiple, are vertically arranged in the fermentation area 1113 side by side, are communicated with an outlet pipe, the outlet pipe is connected with an outlet pipe fan 1108, and the gas filtering device 1109 adopts a gas filtering barrel.

The humidifying device comprises a water inlet pipe 1104, water diversion branch pipes 1105 and spray heads connected with the water diversion branch pipes 1105, wherein the water inlet pipe 1104 is transversely arranged above the fermentation area 113, the water diversion branch pipes 1105 are uniformly distributed on the water inlet pipe 1104 and are 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 which can retract the fermentation heat preservation quilt 1102, and the fermentation heat preservation quilt 1102 is covered on a fermentation area 1113. The fermentation heat preservation quilt 1102 is made of a plastic film and a foaming polyethylene material.

The bottom of the fermentation zone 1113 is provided with a waste liquid collecting tank 1110, and a filter screen is paved on the waste liquid collecting tank 1110.

Referring to fig. 11, in a preferred application embodiment, the fermentation shed 1101 is disposed on the shade side of a large-span greenhouse, the fermentation shed 1101 is constructed from galvanized steel pipes with a diameter of 32mm, the length is the same as that of the large-span greenhouse, the width is generally 7-10m, the ridge height is 2.5m, a front air opening with a height of 1m is left, 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 heat insulation cotton is paved in the fermentation area 1113 and then paved with cement to reduce ground heat transfer; two 30cm waste liquid collecting tanks 1110 are arranged at the bottom of the fermentation zone 1113 and are used for recovering fermentation waste liquid generated by fermentation, and a steel filter screen is paved on the waste liquid collecting tanks to prevent raw materials from leaking downwards. The fermentation pile body (straw) is piled on the fermentation zone 1113, the heat preservation device is arranged outside the fermentation pile body, the humidifying device is arranged at the top of the fermentation pile body, and the ventilation device is arranged at the central position of the fermentation pile body and enters a large-span greenhouse from underground.

The heat preservation device mainly comprises a fermentation heat preservation quilt 1102 made of plastic films and foamed polyethylene materials, and the fermentation heat preservation quilt 1102 is covered and preserved after the fermentation pile body is piled, and the fermentation heat preservation quilt 1102 is provided with a heat preservation curtain rolling device 1103, so that manual operation can be reduced. In winter and early spring cold season, when the fermentation pile body can not be started due to the too low temperature of the outside, the fermentation heat preservation quilt 1102 is started in the noon in the daytime to preheat the fermentation pile body, so that the environment temperature suitable for composting fermentation is reached, and the fermentation process is accelerated.

The humidifying device comprises a water inlet pipe 1104, a water diversion branch pipe 1105, a spray head connected with the water diversion branch pipe 1105 and a control valve, wherein the water inlet pipe 1104 is transversely arranged above the fermentation pile body. The water inlet pipe 1104 is connected with a water inlet, the water inlet pipe 1104 is placed on the fermentation pile body, the water diversion branch pipes 1105 are uniformly distributed on the water inlet pipe 1104 and are provided with spray heads, and the control valve is connected with and controls the switch of the water diversion branch pipes 1105, so that the water content of the pile body is regulated, and the normal fermentation of the pile body is promoted.

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 pipe 1106 and the air outlet pipe 1107 are all PVC pipelines with the diameter of 160mm, the air inlet pipe 1106 is a plurality of PVC pipelines, the air inlet pipe 1106 is vertically arranged in the middle of the fermentation pile body side by side, the center of the fermentation tank bed is lifted to 1.6m from the ground, a plurality of air outlet holes 1111 are formed in the air inlet pipe 1106, and O required by microbial activity is provided for the fermentation pile body ₂ . The air inlet pipes 1106 are communicated with air inlet pipelines, the air inlet pipelines are pre-buried in the ground for 1m and transversely enter the large-span greenhouse, air inlets of the air inlet pipelines are connected with air inlet pipeline fans in the large-span greenhouse 11, and the air inlet pipeline fans are used for cooling O in the large-span greenhouse ₂ Is pumped to the fermentation pile body to provide O for the fermentation pile body to perform microbial activity ₂ . The air outlet pipes 1107 are multiple, are arranged in parallel with the air inlet pipe 1106, the multiple air outlet pipes 1107 are communicated with the air outlet pipeline 1112, the air outlet pipeline 1112 is pre-buried in the underground for 1m and transversely enters the large-span greenhouse, an air outlet of the air outlet pipeline 1112 is connected with an air outlet pipeline fan 1108 and a gas filtering device 1109 in the large-span greenhouse, the gas filtering device 1109 is a gas filtering barrel, gas generated by fermentation is processed by the gas filtering barrel, harmful gas in the gas is removed, and CO required by crop growth is discharged ₂ . The air outlet pipeline fan 1108 adopts a negative pressure conveying mode to convey heat and CO in the pile fermentation body ₂ Pumping into a large-span greenhouse.

The technical matters not specifically described in the foregoing embodiments are the same as those in the prior art.

The above is only a specific embodiment disclosed in the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention should be defined by the claims.

Claims

1. A large span greenhouse, characterized by: the large-span greenhouse comprises a greenhouse steel arch structure, a north wall double-layer heat preservation structure, a gable heat preservation structure, a column structure, a heat storage and release device, a heat brewing and supplementing device and a built-in aerobic fermentation bin, wherein the greenhouse steel arch structure is connected with the north wall double-layer heat preservation structure, the gable heat preservation structure is arranged on two sides of the greenhouse steel arch structure and the north wall double-layer heat preservation structure, the greenhouse steel arch structure is supported by the column structure, the north wall double-layer heat preservation structure comprises an outer arch, an inner arch, a pull rod, a heat preservation quilt, a transverse pull pipe and an arch connecting plate, the outer arch and the inner arch are arc-shaped, the inner arch is arranged on the inner side of the outer arch and connected through the pull rod, the top of the outer arch is connected with the top of the inner arch through the arch connecting plate, the bottom of the outer arch and the bottom of the inner arch are separately arranged, the outer arch frames and the inner arch frames are multiple, the outer arch frames and the inner arch frames are connected through a plurality of horizontal pulling pipes, the outer side of the outer arch frames and the outer side of the inner arch frames are covered with heat preservation covers, the heat storage and release devices are arranged in soil below a large-span greenhouse, the heat brewing and air supplementing devices are arranged outside the large-span greenhouse, the built-in aerobic fermentation bin is arranged inside the large-span greenhouse, the heat storage and release devices comprise an air blower, an air inlet pipeline, a heat exchange pipeline and an air outlet pipeline, the air inlet pipeline is connected with the air outlet pipeline through the heat exchange pipeline, the air inlet pipeline is fixed on an upright post, the air blower is connected with an air inlet of the air inlet pipeline, the air blower is positioned at a position 50 cm to 100cm below the ridge at 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, the heat exchange pipeline 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 positioned in a planting row in the large-span greenhouse, the height of the air outlet pipeline is consistent with the height of a crop canopy, 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 of the fermentation bin body, the material cavity and the permeate cavity are separated by a filter screen, an opening is transversely arranged in the middle of the top of the fermentation bin body, openable cover plates are arranged at two sides of the opening, sliding grooves are respectively arranged at the top and the bottom of the side surface 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 arranged at the top of the fermentation bin body, the vent holes are positioned at two sides of the opening, the diameter of the vent holes is 0.2mm, the distance is 0.2m, a vent hole is arranged at the side surface of the permeate cavity, the diameter of the ventilation opening is 0.1m, the fermentation bin body, the cover plate and the side plates are made of stainless steel materials, the filter screen is 304 stainless steel wire mesh, the wire diameter is 0.1mm, the filter screen is 80 mesh filter screen, the brewing and air supplementing device comprises a fermentation area, a humidifying device is arranged above the fermentation area, a ventilation device is arranged in the fermentation area, the ventilation device comprises an air inlet pipeline fan, an air inlet pipe, an air outlet pipeline fan and a gas filtering device, the air inlet pipeline fan is connected with the air inlet pipe, the air inlet pipe is arranged in the fermentation area, the air inlet pipes are vertically arranged in the fermentation area side by side, the air inlet pipes are all communicated with the air inlet pipeline fan, the air inlet pipe is vertically provided with a plurality of air outlet holes, the air outlet pipe is connected with the gas filtering device through the air outlet pipeline fan, the utility model provides a fermentation area, including fermentation area, humidification device, ventilation unit, heat preservation device, outlet duct sets up in the fermentation area, the outlet duct is a plurality of, the outlet duct is vertical to be set up side by side in the fermentation area, a plurality of outlet ducts all communicate with the pipeline of giving vent to anger, the pipeline of giving vent to anger is connected with the pipeline fan of giving vent to anger, humidification device includes inlet tube, branch water pipe and the shower nozzle with branch water piping connection, the inlet tube transversely sets up in the fermentation area top, branch water pipe is a plurality of, the equipartition is on the inlet tube to with the inlet tube intercommunication, brewing air supplement unit still includes heat preservation device, heat preservation device includes fermentation heat preservation quilt and can with the heat preservation by the heat preservation rolling up curtain ware of packing up, fermentation heat preservation quilt covers on the fermentation area, fermentation area bottom is provided with the waste liquid collecting vat, waste liquid collecting vat upper berth is provided with the fermentation canopy in the fermentation area outside, humidification device, ventilation unit and heat preservation device all set up in the fermentation canopy.

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 skeleton connecting plate, a clamping film groove and an arch cross-pull pipe, wherein the arch upper chord and the arch lower chord are arc-shaped, the arch lower chord is arranged on the inner side of the arch upper chord, the arch upper chord and the arch lower chord are vertically connected through the double arch clamps, the arch upper chord top and the arch lower chord top are connected through the skeleton connecting plate, the arch upper chord bottom and the arch lower chord bottom are connected, the arch upper chord and the arch lower chord are all in a plurality, the outer side of the arch upper chord is provided with the clamping film groove, the arch connecting plate is connected with the skeleton connecting plate, the gable heat insulation structure comprises a main upright, auxiliary uprights, a cross-pull rod, a gable heat insulation quilt and a door, the main uprights are vertically arranged below the upper chord on two sides of the composite greenhouse, the auxiliary uprights are respectively arranged on the two sides of the main uprights, the auxiliary uprights are respectively arranged below the composite uprights, the outer side of the composite uprights are connected with the outer side of the composite uprights, the outer side of the composite uprights are arranged between the outer side of the composite uprights, the outer side of the composite uprights and the outer side of the composite uprights are connected with the cross-pull steel arch is arranged, the outer side of the composite uprights is provided with the cross-pull pipe, the outer side of the composite uprights is connected with the outer side of the composite uprights, the composite uprights is arranged between the outer side of the composite uprights and the composite uprights are connected with the outer side of the composite uprights, and the composite uprights are arranged, the outer side of the composite uprights is connected with the outer side of the composite upright and the composite upright. And a scissor brace is arranged between the upright post transverse pull pipe and the upright post transverse pull rod.

3. The large span greenhouse of claim 2, wherein: the large-span greenhouse further comprises a double-beam structure, the double-beam structure comprises an upper beam, a lower beam and an upper beam connecting piece and a lower beam connecting piece, the upper beam and the lower beam are connected through the upper beam connecting piece and the lower beam connecting piece, the upper beam connecting piece and the lower beam connecting piece are arranged between an arch frame connecting plate and a skeleton connecting plate, and the upper beam connecting piece and the lower beam connecting piece extend upwards to the outside of the upper beam to form a heat preservation quilt overturn preventing structure.

4. A large span greenhouse according to claim 3, characterized in that: the large-span greenhouse further comprises a foundation and an embedded part, the foundation and the embedded part comprise a plurality of greenhouse arch foundations and independent foundations, ring beam reinforcement and ring beam framework connection embedded parts are arranged on the greenhouse arch foundations, the outer arch bottom, the inner arch bottom, the arch upper chord bottom and the arch lower chord bottom are respectively arranged on the greenhouse arch foundations through ring beam reinforcement and ring beam framework connection embedded parts, reinforcement and independent foundation upright post connection embedded parts are arranged on the independent foundations, and the upright post bottoms are arranged on the independent foundations through reinforcement and independent foundation upright post connection embedded parts.

5. The large span greenhouse of any one of claims 2 to 4, wherein: the novel high-speed intelligent roof arch 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, 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 rolling device capable of rolling and unrolling the window covering layer are arranged on the bottom vent, and the window covering layer consists of an outer-layer PO film and an inner-layer insect net.

6. The large span greenhouse of claim 5, wherein: the stair and the handrail are arranged above the upper chord of the arch frame on the side face of the large-span greenhouse, and the handrail is arranged outside the stair.

7. The large span greenhouse of claim 6, wherein: the total length of the large-span greenhouse is 80 m-200 m, the span is 16.8m, the ridge height of the greenhouse is 7m, and the span of the greenhouse steel arch structure is larger than that of the double-layer heat-insulating structure of the north wall.