CN201821706U - Longspan internal heat preservation double-layer plastic film-covered greenhouse - Google Patents

Abstract

The utility model discloses a large-span internal thermal insulation double-layer plastic film covered greenhouse, which belongs to the field of modern facility agricultural engineering. It is designed for the defects of low land utilization rate and poor heat preservation of existing greenhouses in Northwest my country. The skeleton of the greenhouse is mainly composed of inner and outer two-layer steel skeleton and columns. The outer shed adopts a double-chord skeleton and is covered with a film. The roller shutter machine is installed on the roller shutter machine bracket at the middle part of the roof of the inner skeleton. There is a row of cement piers in the middle of the greenhouse for installing columns. The utility model has the advantages: 1. Reduce the marginal low temperature effect around the shed, and improve the land utilization rate. 2. Improve the ability of the greenhouse to resist wind and snow, and at the same time, the inner film insulation is improved the thermal insulation performance of the greenhouse. 3. The insulation is built-in, eliminating the need for disassembly, saving time, effort and money. 4. The heat insulation layer between the shed layers can alleviate the large changes in climate and help snow melt at the same time.

Description

A large-span inner thermal insulation double-layer plastic film covered greenhouse

Technical field:

The invention relates to a large-span inner thermal insulation double-layer plastic film greenhouse, which can increase the temperature inside the greenhouse and greatly improve the heat preservation and heat storage capacity of the plastic greenhouse, and belongs to the technical field of modern facility agricultural engineering. the

Background technique:

At present, in the cultivation of agricultural facilities, it is common practice to use various types of plastic greenhouses for off-season cultivation, but the current existing plastic greenhouses have the following disadvantages: 

(1) On the one hand, although the land utilization rate of existing greenhouses can reach more than 90%, due to the influence of marginal effects, the critical area of 1m around the greenhouse is in a low temperature state for a long time, which is not conducive to crop growth. In addition, the span of ordinary greenhouses is generally 6-12m, and the climate in the greenhouses changes greatly, especially around the greenhouses, which is not suitable for the growth of crops, so the actual land utilization rate of the greenhouses is not high. the

(2) Ordinary greenhouses need to be covered with thermal insulation quilts and other thermal insulation materials at night, but since the thermal insulation quilts are all of the outer covering type, this method requires them to have a waterproof function, which results in high cost of the greenhouse. In addition, the air on the surface of the thermal insulation quilt and the gaps in the thermal insulation quilt The air between them is directly connected. Affected by the natural environment such as wind speed, the heat on the surface of the greenhouse is transferred to the outside quickly. The lowest temperature in the greenhouse in winter is only 4-6°C, and the overall insulation effect is poor. the

(3) In view of winter snowfall and sandstorm weather in Northwest my country, snow and sand particles are all accumulated on the surface of the thermal insulation quilt, which not only reduces the thermal insulation performance of the thermal insulation quilt, but also increases unnecessary manual labor, which not only wastes a lot of manual labor, But also increased security risks. the

(4) The existing greenhouses are equipped with multiple arched inner sheds in order to increase the temperature. Multiple aisles need to be left between the inner sheds, which not only reduces the planting area, but also increases the heat dissipation area, resulting in the temperature of the inner shed at night. Too low is not conducive to the growth of temperature-loving plants. In addition, the temperature in the shed rises rapidly during the day, and a large area of high temperature has been formed, which is not conducive to the growth of cool-loving crops. the

(5) The thermal insulation quilt of the existing plastic greenhouse needs to be disassembled every spring and installed in autumn, which not only wastes a lot of human resources, but also increases the safety hazard in the process of preserving the thermal insulation quilt. the

Invention content:

The purpose of the present invention is to overcome the deficiencies in the prior art. On the one hand, it adopts a large span to improve the land utilization rate, alleviates the disadvantage of large marginal climate change in the shed, and increases the planting area of crops. Membrane covering improves the heat preservation effect of the greenhouse. The inner liner air between the membranes acts as a buffer space, which not only helps to increase the temperature of the greenhouse at night, but also reduces the area of high temperature areas during the day in time. In addition, it can pass the temperature of the inner shed in winter. Resolve the snow on the outer shed in time, save labor and reduce the load. Therefore, the focus of the present invention is to provide an efficient and convenient utility model plastic greenhouse. The plastic greenhouse has good thermal insulation performance in winter and keeps the inside of the greenhouse cool in summer. the

Technical solution: a large-span inner insulation double-layer plastic film covered greenhouse, which is characterized in that: walls are set up in the north and south, composed of two layers of steel skeletons inside and outside and columns, the outer skeleton adopts a double-chord skeleton, covered with a film, and the inner shed is composed of an inner skeleton , film, roller blind machine and insulation are composed, the inner frame adopts a single frame structure, the roller shutter machine is installed on the roller shutter machine bracket in the middle of the roof of the inner frame, and a row of cement piers is set in the middle of the greenhouse for installing columns. the

Two production doors are installed on the north and south walls respectively. The cement pier is pre-buried in the middle of the greenhouse to facilitate the installation of the columns. the

Compared with the prior art, the beneficial effects of the utility model are reflected in:

(1) By increasing the span and length of the greenhouse, the land utilization rate is increased to more than 90%, and the marginal low temperature effect around the greenhouse is reduced, and the planting area is increased; (2) The outer film covering improves the wind and sand resistance of the entire greenhouse , adapted to the northwestern region of China; the inner film is covered with insulation quilt, which makes the temperature inside the shed in winter 4-8 ℃ higher than that of the previous double-layer greenhouse, which can basically meet the needs of warm-loving vegetables in the northwestern region of China to survive the winter safely; (3) due to With the protection of the outer shed film, the service life of the insulation quilt can be extended by 2-3 years. In addition, there is no need to disassemble it all year round, which can save about 40 labors; (4) The buffer liner type insulation layer between the shed films can relieve the external The extent of climate change, increasing the nighttime temperature of the greenhouse can reduce the area of the high temperature area in time in time, and the snow in winter can be resolved in time through the temperature of the inner shed, saving labor and reducing load. the

Description of drawings:

Attached Figure 1: Schematic diagram of the structural section of the main view;

Accompanying drawing 2: Schematic diagram of longitudinal section section structure;

Accompanying drawing 3: Schematic diagram of side cross section. the

Numbers in the picture: 1.6' galvanized pipe, 2.4' galvanized pipe, 3. film, 4. thermal insulation quilt, 5. shutter machine, 6.8cm×8cm×600cm hollow steel pipe column, 7.24cm×24cm cement pier, 8. Galvanized arch beams, 9. Production doors. the

Detailed ways:

The greenhouse of this example is a large-span internal thermal insulation double-layer film plastic greenhouse, as shown in Figure 1 and Figure 2, it includes two walls, north and south, and an outer shed and an inner shed in an east-west direction. The span of the greenhouse is 20m, and the height is 6m. The outer shed adopts a double-skeleton structure, and the inner shed adopts a single-skeleton structure. It is especially suitable for the climate characteristics of windy sand and heavy snow in Northwest my country. Played a full role in heat preservation and moisture-proof. The outer shed is composed of a 6' galvanized pipe 1 and a 4' galvanized pipe 2 to form a double-layer skeleton. The steel skeleton is covered with a film 3, wherein the film 3 is pressed on the arch beam 8 of the galvanized pipe 1 by a lamination line. The inner shed is made of The galvanized pipe 1, the film 3, the insulation quilt 4 and the pull-type roller shutter machine 5 are composed of the pull-wire roller shutter machine placed on the special support of the galvanized pipe 1 in the inner shed, and the height of the lead screw is about 50 cm from the roof surface of the shed. Select the matching drawstrings, divide them into left and right sides, and pull the insulation quilts on the east and west sides respectively. the

As shown in Fig. 2 and Fig. 3, a row of cement piers 7 are arranged along the columns in the middle of the interior of the greenhouse. The lower ends of the cement piers 7 are buried in the soil by 40 cm, and 20 cm above the ground, which can prevent the invasion of pests. 8cm × 600cm hollow steel pipe columns 6, several rows of hollow steel pipe columns 6 in a single row and arch beams arranged on each row of columns form a north-south scaffolding, each arch beam 8 is provided with tie bars, the tie bars and the columns The intersection is clamped by a locking device. the

Claims (4)

1. A large-span internal thermal insulation double-layer plastic film covered greenhouse, characterized in that: walls are set up in the north and south, composed of inner and outer two-layer steel skeletons and columns, the outer skeleton adopts a double-chord skeleton, covered with a film, and the inner shed is composed of an inner skeleton, The film, roller blind machine and insulation are composed. The inner frame adopts a single frame structure. The roller shutter machine is installed on the roller shutter machine bracket in the middle of the roof of the inner frame. A row of cement piers is set in the middle of the greenhouse for installing columns. 2. A large-span internal insulation double-layer plastic film-covered greenhouse according to claim 1, characterized in that two production doors are respectively installed on the above-mentioned north and south walls. 3. A large-span inner insulation double-layer plastic film covered greenhouse according to claim 1, characterized in that: the above-mentioned columns are installed on a row of concrete piers preset in the middle of the greenhouse. 4. A large-span inner insulation double-layer plastic film-covered greenhouse according to claim 1, characterized in that: the above-mentioned roller blind machine adopts a left and right pull wire structure, and is placed on the frame roller shutter machine support of the inner shed. the

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