CN108849090B - Method for constructing net frame type large-span pillar-free rectangular dome energy-saving greenhouse - Google Patents

Method for constructing net frame type large-span pillar-free rectangular dome energy-saving greenhouse Download PDF

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CN108849090B
CN108849090B CN201810730733.9A CN201810730733A CN108849090B CN 108849090 B CN108849090 B CN 108849090B CN 201810730733 A CN201810730733 A CN 201810730733A CN 108849090 B CN108849090 B CN 108849090B
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greenhouse
heat preservation
net frame
constructing
frame type
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CN108849090A (en
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徐伟忠
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LISHUI AGRICULTURE SCIENCE
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14Greenhouses
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14Greenhouses
    • A01G9/1407Greenhouses of flexible synthetic material
    • A01G9/1415Greenhouses of flexible synthetic material with double or multiple walls
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/22Shades or blinds for greenhouses, or the like
    • A01G9/227Shades or blinds for greenhouses, or the like rolled up during non-use
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/24Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
    • A01G9/246Air-conditioning systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25Greenhouse technology, e.g. cooling systems therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/14Measures for saving energy, e.g. in green houses

Abstract

The invention discloses a method for constructing a net frame type large-span non-support rectangular dome energy-saving greenhouse suitable for annual non-stop production, and belongs to the technical field of greenhouses. The method utilizes a steel structure grid technology to construct a large-span pillar-free greenhouse steel structure with a dome at the top and a rectangular ground edge, utilizes a grid platform inside the greenhouse to implement heat preservation and covering to achieve the effect of heat preservation in cold seasons, combines a water wall heat storage technology inside the greenhouse to achieve dynamic controllability of heat preservation, heat storage and heat dissipation, and realizes heating-free and pause-free production of vegetables and fruits in cold regions in winter; the configuration of the wet curtain and the fan at the two ends of the rectangular type is combined, the ventilation and cooling cultivation in high temperature summer is realized, the annual continuous production of greenhouse crops in cold regions or warm regions is ensured, and the greenhouse cultivation method is an integrated innovation of the structure technology and the regulation technology in the greenhouse field.

Description

Method for constructing net frame type large-span pillar-free rectangular dome energy-saving greenhouse
Technical Field
The invention belongs to greenhouse facilities. Relates to a novel greenhouse structure and a novel energy-saving environment regulation and control method, which is used for greenhouse cultivation of agricultural production economic crops and realizes annual continuous production.
Background
Greenhouse technology has a long history from invention to present, and the earliest Roman empire state starts to build a greenhouse for cucumber production by using mica as a covering from 3 to 37 years before the Gongyuan; french in the 17 th century vegetable planting was carried out by covering a hotbed with glass, and then a simple glass greenhouse was built; before the invention of glass is not invented, the Tang dynasty in China has a plain greenhouse cultivation method that oil paper is used as a covering and hot spring water is used for heating; the popularization and development of greenhouse technology are promoted in the middle of the 20 th century along with the development of plastic industry, particularly the appearance of agricultural films. At present, the technology and the method for building the greenhouse in China have the following general modes: simple plastic arched sheds, multi-span greenhouses, glass greenhouses and earth wall sunlight greenhouses. Wherein the sunlight greenhouse is also called a winter-heating greenhouse, and the arched greenhouse and the multi-span greenhouse are also called spring and autumn greenhouse; the greenhouse of the types has the advantages and the disadvantages, such as the earth wall sunlight greenhouse is mainly used for winter production in cold areas, the film must be lifted for open-air production in summer, and the temperature of the greenhouse in summer is higher due to the existence of the earth wall; the spring and autumn greenhouse has the production effects of advancing early spring and delaying late autumn, production cannot be regulated and controlled all the year round, the multi-span greenhouse and the glass greenhouse can achieve all-year production by matching heating and cooling measures, but heating energy consumption in winter is large, and production cost is high; in addition, the greenhouse structure is usually built by adopting galvanized pipes or channel steel to construct an arch-shaped or herringbone roof, the spacing between every arch or every span is generally 8-12 meters, the integrated large-area greenhouse construction can be realized only by adopting upright post support, the mechanical structure of the greenhouse structure is limited by the greenhouse height which is generally between 2.6 and 7 meters, and the mechanical structure influences the stress and reduces the wind resistance if the mechanical structure is too high, so that tall trees and fruit trees cannot be cultivated, and most of the greenhouse structure is used for vegetable and fruit cultivation.
With the development and application of the soilless culture technology and the industrial facility technology, a new demand is put forward for the greenhouse technology, the greenhouse technology is covered all the year round at first to achieve the effect of rain sheltering and insect prevention isolated culture, and the film-lifting culture in summer is not carried out like a spring and autumn shed and a sunlight greenhouse; in addition, the three-dimensional cultivation requirement requires a more spacious greenhouse space to meet the growth requirement; meanwhile, the coping of disastrous weather requires strong wind resistance and snow load resistance of the greenhouse; in order to pursue higher economic benefit, energy conservation needs to be considered, and the creation of a greenhouse with low energy consumption and year-round production becomes the focus of technical innovation in the current greenhouse field and is also supply-side innovation to be solved in the future industrialized three-dimensional facility agriculture.
Disclosure of Invention
Aiming at the problems that the current greenhouse technology is single in type, individual requirements cannot be met with annual low-energy-consumption production, and the resistance to disastrous weather is poor, the space utilization rate is low and the like, the method for building the net-frame type large-span pillar-free rectangular dome energy-saving greenhouse is provided, and the low-energy-consumption annual continuous production of the facility greenhouse is realized.
The purpose of the invention is realized by the following technical scheme.
The method for constructing the net frame type large-span pillar-free rectangular dome energy-saving greenhouse comprises the following steps:
A. according to the length and width of the rectangular land and the internal cultivation requirement, determining the shoulder height and the top height of the greenhouse;
B. the CAD design of a greenhouse structure comprises a dome and shoulder vertical plane grid structure, a top triangular ventilation window, an entrance gate, a heat preservation facility grid platform, a wet curtain and a fan;
C. calculating the total volume of the water wall required to be configured according to the lowest local winter air temperature and the lower limit or the proper temperature required by greenhouse cultivation as references by combining the volume of the cultivation area and the condition of heat preservation facilities, and determining the number of chemical barrels;
D. calculating the ventilation quantity of a fan and the quantity of wet curtains required to be configured in high-temperature seasons in summer according to the total volume of the greenhouse space;
E. arranging the lengths of the net rack greenhouse component materials and numbering different specifications of the materials according to a CAD design drawing, and manufacturing a processing list and an assembly drawing; the precision of the length of the part material is kept to four digits after decimal point;
F. selecting a hot-dip galvanized steel pipe as a component material, wherein the pipe is 2.5cm in pipe diameter and 0.17mm in wall thickness, and performing punching processing by using a punch according to a processing list;
G. installing a greenhouse steel framework, wherein the framework is installed in a screw screwing mode, an electric wrench is used for suspending in the air in combination with a hoisting block according to an assembly drawing, and the framework is installed from the top of a greenhouse layer by layer until the framework is installed to the bottommost layer of the shoulders of the greenhouse;
H. installing a greenhouse clamping groove clamp spring, laying a greenhouse film and assembling a triangular window, wherein an outer greenhouse clamping groove is installed on a longitudinal dimensional line of a triangular structure and a V-shaped steel structure of an inner honeycomb and used for fixing the film, a double-layer film heat insulation effect can be formed, the triangular window is a push rod type electric opening and closing ventilation window, fans or wet curtains with corresponding power are installed at two ends of the greenhouse according to calculated ventilation volume, and an inlet and outlet gate is built at the central line of a long side or a wide side of the greenhouse;
I. the heat preservation facility adopts a light heat preservation curtain, and steel wires are drawn by a wire tightening clamp at the shoulder of the greenhouse according to the dimension of the greenhouse to be used as a covering support of the heat preservation curtain; when the greenhouse is built, the heat insulation facilities and the net rack platform designed for installation are installed together through steel structure.
And B, forming a space truss interlayer with the thickness of 0.5-0.8m after the net rack structure is built by an outer triangular structure, an inner honeycomb structure, a space truss structure and a reinforced inner honeycomb structure, and installing a clamping groove clamping inner film on the inner honeycomb structure to form a double-layer heat-insulating film.
The water wall in the step C is constructed in a mode that chemical barreled water is stacked into a wall, and is stacked on two sides of a longitudinal and transverse center line passageway of a greenhouse with sufficient illumination in winter, and the surface of the barrel is blackened; the chemical barrel is moved in summer or the water in the chemical barrel is discharged and the surface of the chemical barrel is white and light-reflecting.
The calculation in the step C is to calculate the energy consumption per hour required for keeping the target temperature by taking the lowest temperature in the external winter and the lowest and the most suitable temperature required by the internal cultivation as references and combining the thermal conductivity coefficient of the heat preservation facility; calculating the total water storage capacity of the required water wall by taking the specific heat capacity of water as a reference; and calculating the number of the required chemical barrels according to the water storage capacity of each barrel.
The heat preservation facility is a heat preservation quilt, a heat preservation curtain, a sunlight plate or glass; the number of layers of the heat preservation facility is single layer or double layers.
And D, calculating the ventilation volume of the fans according to the total volume of the greenhouse space, combining the number of the needed fans and calculating the needed flow of each fan in a ventilation mode of ventilation once per minute.
And F, stamping, wherein the length is measured by taking the pitch as the standard during stamping, and the aperture is 8 mm.
And G, installing the screw in a screw screwing mode, namely sleeving a part material into the screw according to the code of each node of the assembly drawing in the sequence of gasket-pipe-gasket-nut, and screwing by using an electric wrench.
And H, installing a clamping spring of the greenhouse clamping groove by adopting a clamping piece or a self-tapping screw.
And step I, the grid platform is installed by adopting pipes according to a triangular grid structure, and supporting columns are added below the platform in a crossing manner or water walls are used as supports.
The invention has the beneficial effects that:
(1) compared with the common arched greenhouse, the dome-shaped space truss type net rack structure is applied to the integral net rack type tension mechanics, greatly enhances the compression resistance and improves the snow load and wind resistance.
(2) The double-film covering is adopted to form a static air layer with the thickness of 0.5-0.8m, so that the heat preservation effect similar to that of an inflatable film is achieved, the heat preservation performance of the greenhouse is greatly improved, and the double-film covering is superior to the single-film covering, the sunlight plate covering and the glass covering.
(3) The dome structure has large space, is suitable for three-dimensional farming and greenhouse cultivation of high and large economic plants, simultaneously has no pillar design, and improves the utilization rate of the ground and the flexibility of layout.
(4) The integration of water wall technique has more heat accumulation nature than the cob wall greenhouse, and the specific heat of water is 3 times of cob wall, has more the flexibility moreover, and the summer can be removed or the evacuation retaining is handled, has solved cob wall greenhouse summer canopy high temperature's problem.
(5) The wet curtain and the fan are arranged at the two ends of the rectangular net rack greenhouse, and the triangular window at the top is opened, so that a good ventilation effect and a good cooling effect are formed, and film-covering cultivation in high-temperature seasons in summer is realized.
By combining the technical measures, the energy-saving heating-free greenhouse in cold regions has no fallow crop all the year around, and the problem of crop growth obstacle caused by high-temperature climate in summer is solved, which is incomparable effect and innovation compared with the traditional greenhouse type.
Drawings
FIG. 1 is a schematic view of a plot of an embodiment of the present invention;
FIG. 2 is a plan view of a greenhouse according to an embodiment of the invention;
FIG. 3 is a schematic view of a greenhouse according to an embodiment of the invention;
FIG. 4 is a schematic view of a vertical grid structure of a greenhouse in accordance with an embodiment of the present invention;
FIG. 5 is a material assembly drawing of a portion of a greenhouse component according to an embodiment of the present invention;
FIG. 6 is a schematic view of a water wall of a greenhouse according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
Taking a rectangular land block of 25m by 40m as an example, a net frame type large-span non-support rectangular dome energy-saving greenhouse is built. The construction steps are as follows:
1) the land width for building the greenhouse is 25 meters and the length is 40 meters (figure 1), the land occupation is 1000 square meters, the rectangular net rack greenhouse with the shoulder height of 3.6 meters and the dome top height of 10.6 meters is proposed to be built (figure 2).
2) A steel skeleton line graph (shown in figure 3) and a three-dimensional model of a greenhouse are drawn by CAD drawing software, and the three-dimensional model comprises a dome and shoulder vertical plane grid structure (shown in figure 4), a top triangular ventilation window, an entrance gate, a covering heat preservation curtain grid platform, a wet curtain, a fan and the like, wherein the dome and shoulder vertical plane grid structure is composed of an outer triangular structure 1, an inner honeycomb structure 2, a space truss structure 3 and a reinforced inner honeycomb structure 4.
3) Utilizing CAD software to code and mark steel structure parts at the dome and shoulders of the greenhouse, cleaning and recording the length of each material, and respectively manufacturing an assembly drawing (a part of assembly drawing is shown in figure 5) and a material processing list (the part list is shown in the following list):
4) calculating the total steel consumption of the greenhouse to be 9000m pipes by using CAD software, increasing the loss by 10 percent, and purchasing 10000m25# hot-dip galvanized pipes with the wall thickness of 1.7 mm; and punching by using a punch according to the length and the number of the processing list, writing a corresponding code on each material by using a mark after processing, and searching when the material is convenient to install.
5) Mounting the greenhouse framework, namely preparing mounting tools such as a stay bar, a hoisting hoist and an electric wrench; the installation starting points are arranged from the central point of the site and the top of the greenhouse assembly drawing layer by layer, the greenhouse assembly drawing layer by layer is sequentially installed downwards, and the supporting rod hoist is used for hoisting each layer during installation, so that the installation part is lifted off the ground, and the screw installation is convenient.
6) The installation of every node of rack, according to the assembly drawing in proper order toward the screw rod on penetrate corresponding part material to screw up the nut with electric spanner, notice in the material both ends must fill up the gasket, the material presss from both sides in the middle of the gasket, just so can reach good fastening effect.
7) When installation greenhouse skeleton, carry out the draw-in groove installation simultaneously, to the position (outer greenhouse draw-in groove and interior honeycomb draw-in groove) of needs installation draw-in groove line, go up the draw-in groove with self tapping screw or fastener assembly, installation effectiveness is higher like this, need not to climb the height operation, and the greenhouse overall length is 10.6m, when installing to half high, can carry out the membrane and cover, carries out card membrane operation (including adventitia and inner membrance) to the dome part of installing earlier, need climb the height tectorial membrane operation after avoiding whole building, influence safety.
8) Similarly, the installation of the triangular window is completed together with the installation of the steel structure, so that the probability of high-altitude operation is reduced, and the links of the overhead operation are reduced for installers; along with the increase of the number of the mounting layers, the number of the supporting rods and the hoisted cucurbits is continuously increased, and during hoisting, the mounting part is lifted off the ground, and other parts can be grounded so as to increase the stability of the greenhouse and save the number of the cucurbits.
9) Calculating the optimal ventilation quantity to allocate and install the corresponding fan flow according to the space volume of the greenhouse, installing fans at the distance of 4m at the vertical shoulders with the side lengths of 25m at the two ends, and installing 6 fans in total; the space volume of the greenhouse is 6681m3The optimal ventilation rate is calculated once per minute for all ventilation of the greenhouse space, and the flow rate per minute of each fan is 6681m3/6=1113.5m3That is, the air flow rate per hour is 66810m3The fan of (2). And one end of each of the two ends of the greenhouse is provided with a fan, and the other end of the greenhouse is provided with a wet curtain, so that negative pressure type convection ventilation and cooling are formed.
10) The design of the heat storage system and the heat preservation system takes the lowest temperature of-10 ℃ at the outside and the lowest temperature of 10 ℃ at night of the cultivated crops as the management target, and the 183413 heat of large calorie is consumed per hour on the premise that an inner heat preservation quilt or a heat preservation curtain is not covered but only double films are covered; the water temperature of a heat storage water wall in the greenhouse is reduced to a 15-degree temperature difference of 10 ℃ by 25 ℃ in the daytime and is measured by a 15-degree temperature difference meter within 15 hours from 6 pm in the daytime to 9 am in the next day, namely the temperature of the water wall is reduced by 1 ℃ per hour, namely within 15 hours at night, 183413 heat is released to ensure that the greenhouse is kept at the room temperature of more than 10 ℃ at the outside temperature of-10 ℃; the total capacity of the water wall of the greenhouse is required to be 183413Kg measured by a water specific heat capacity 1 kilocalorie (Kg DEG C), the heat storage requirement can be met only by building 920 barrels into the water wall measured by a 200L chemical barrel, as shown in figure 6, the longitudinal main aisle of the greenhouse is 50 meters long, the transverse main aisle and two end aisles are removed, 45m is used as a water wall building area for calculation, 24m of the transverse main aisle is used for 20m, two sides of the 70m aisle in total can be used for building the chemical barrel, the diameter of the barrel is 0.6m, the height of the barrel is 0.9m, two rows of two layers of the two sides of the longitudinal main aisle and the transverse main aisle are arranged, and a chemical barrel 933 is arranged, so that the non-heating effect is basically realized. The room temperature is 10 ℃ on the premise of the outside air temperature of-20 ℃, and the inside is covered by double films and covered at the position higher than 3 meters and the inside is separated by a heat preservation cover or a heat preservation curtainBooth (2808 m)3) The comprehensive thermal conductivity coefficient is 0.273, 87647 kcal (kcal) is consumed per hour, no solar energy is emitted into the meter within 15 hours, the 15-degree temperature difference meter for reducing the water temperature of a water wall to 10 ℃ is used, 87.6 cubic meters of water is used as the water wall, chemical barrels are taken as examples, each chemical barrel contains 21 liters of water and is calculated, and the matched chemical barrel 438 is only built into the water wall; two rows of 2.5 layers are built according to two sides of a 45m long passageway, and chemical barrels of 450 are arranged together, so that the effect of no heating is basically realized.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (9)

1. The method for constructing the net frame type large-span pillar-free rectangular dome energy-saving greenhouse is characterized by comprising the following steps of:
A. according to the length and width of the rectangular land and the internal cultivation requirement, determining the shoulder height and the top height of the greenhouse;
B. the CAD design of a greenhouse structure comprises a dome and shoulder vertical plane grid structure, a top triangular ventilation window, an entrance gate, a heat preservation facility grid platform, a wet curtain and a fan; the net frame structure consists of an outer triangular structure (1), an inner honeycomb structure (2), a space truss structure (3) and a reinforced inner honeycomb structure (4), a space truss interlayer with the thickness of 0.5-0.8m is formed after the net frame structure is built, and a clamping groove clamping inner film is arranged on the inner honeycomb structure to form a double-layer heat-insulating film;
C. calculating the total volume of the water wall required to be configured according to the lowest local winter air temperature and the lower limit or the proper temperature required by greenhouse cultivation as references by combining the volume of the cultivation area and the condition of heat preservation facilities, and determining the number of chemical barrels;
D. calculating the ventilation quantity of a fan and the quantity of wet curtains required to be configured in high-temperature seasons in summer according to the total volume of the greenhouse space;
E. arranging the lengths of the net rack greenhouse component materials and numbering different specifications of the materials according to a CAD design drawing, and manufacturing a processing list and an assembly drawing; the precision of the length of the part material is kept to four digits after decimal point;
F. selecting a hot-dip galvanized steel pipe as a component material, wherein the pipe is 2.5cm in pipe diameter and 0.17mm in wall thickness, and performing punching processing by using a punch according to a processing list;
G. installing a greenhouse steel framework, wherein the framework is installed in a screw screwing mode, an electric wrench is used for suspending in the air in combination with a hoisting block according to an assembly drawing, and the framework is installed from the top of a greenhouse layer by layer until the framework is installed to the bottommost layer of the shoulders of the greenhouse;
H. installing a greenhouse clamping groove clamp spring, laying a greenhouse film and assembling a triangular window, wherein an outer greenhouse clamping groove is installed on a longitudinal dimensional line of a triangular structure and a V-shaped steel structure of an inner honeycomb and used for fixing the film, a double-layer film heat insulation effect can be formed, the triangular window is a push rod type electric opening and closing ventilation window, fans or wet curtains with corresponding power are installed at two ends of the greenhouse according to calculated ventilation volume, and an inlet and outlet gate is built at the central line of a long side or a wide side of the greenhouse;
I. the heat preservation facility adopts a light heat preservation curtain, and steel wires are drawn by a wire tightening clamp at the shoulder of the greenhouse according to the dimension of the greenhouse to be used as a covering support of the heat preservation curtain; when the greenhouse is built, the heat insulation facilities and the net rack platform designed for installation are installed together through steel structure.
2. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 1, wherein the method comprises the following steps: the water wall in the step C is constructed in a mode that chemical barreled water is stacked into a wall, and is stacked on two sides of a longitudinal and transverse center line passageway of a greenhouse with sufficient illumination in winter, and the surface of the barrel is blackened; the chemical barrel is moved in summer or the water in the chemical barrel is discharged and the surface of the chemical barrel is white and light-reflecting.
3. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 2, wherein the method comprises the following steps: the calculation in the step C is to calculate the energy consumption per hour required for keeping the target temperature by taking the lowest temperature in the external winter and the lowest and the most suitable temperature required by the internal cultivation as references and combining the thermal conductivity coefficient of the heat preservation facility; calculating the total water storage capacity of the required water wall by taking the specific heat capacity of water as a reference; and calculating the number of the required chemical barrels according to the water storage capacity of each barrel.
4. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 1, wherein the method comprises the following steps: the heat preservation facility is a heat preservation quilt, a heat preservation curtain, a sunlight plate or glass; the number of layers of the heat preservation facility is single layer or double layers.
5. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 1, wherein the method comprises the following steps: and D, calculating the ventilation volume of the fans according to the total volume of the greenhouse space, combining the number of the needed fans and calculating the needed flow of each fan in a ventilation mode of ventilation once per minute.
6. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 1, wherein the method comprises the following steps: and F, stamping, wherein the length during stamping is measured by taking the pitch of the holes as a standard, and the diameter of the holes is 8 mm.
7. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 1, wherein the method comprises the following steps: and G, installing the screw in a screw screwing mode, namely sleeving a part material into the screw according to the code of each node of the assembly drawing in the sequence of gasket-pipe-gasket-nut, and screwing by using an electric wrench.
8. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 1, wherein the method comprises the following steps: and H, installing a clamping spring of the greenhouse clamping groove by adopting a clamping piece or a self-tapping screw.
9. The method for constructing a net frame type large-span pillar-free rectangular dome energy-saving greenhouse as claimed in claim 1, wherein the method comprises the following steps: and step I, the grid platform is installed by adopting pipes according to a triangular grid structure, and supporting columns are added below the platform in a crossing manner or water walls are used as supports.
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CN106065731B (en) * 2016-07-25 2018-05-01 大唐环境产业集团股份有限公司 A kind of modularization large span storage canopy and its method of construction
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CN107018820A (en) * 2017-05-11 2017-08-08 王清祥 Large span non-support energy saving sunlight greenhouse greenhouse
CN206713589U (en) * 2017-05-11 2017-12-08 王清祥 Large span non-support energy saving sunlight greenhouse greenhouse
CN107114153A (en) * 2017-05-17 2017-09-01 哈尔滨佳美温室设施有限公司 Cold ground ecological health-care house and assemble method
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