Greenhouse used for planting tomatoes

Abstract

The invention relates to the technical field of greenhouses, in particular to a greenhouse used for planting tomatoes. The greenhouse comprises a thin film, arch-shaped supports used for supporting the thin film, and pulling rods used for connecting the two adjacent arch-shaped supports. Each arch-shaped support comprises a connecting piece, a first supporting rod and a second supporting rod, wherein the first supporting rod and the second supporting rod are connected to the two ends of the connecting piece, the first supporting rod is bent to form a first arch-shaped part, the second supporting rod is bent to form a second arch-shaped part, and a downwards concave part located between the first arch-shaped part and the second arch-shaped part is arranged at the position of the connecting piece. The thin film covers the first supporting rods and the second supporting rods, ventilation holes are formed in the downwards concave parts, and a rainproof plate used for covering the ventilation holes is arranged above the ventilation holes. The greenhouse is simple in structure, high in strength and high in load bearing capacity, pressure borne by the greenhouse is scattered on the first arch-shaped parts and the second arch-shaped parts, and the structure has higher load-bearing capacity than large-span single-arch greenhouses.

Description

technical field [0001] The invention relates to the technical field of greenhouses, in particular to a greenhouse for growing tomatoes. Background technique [0002] At present, the more practical greenhouses generally include single-span greenhouses, multi-span greenhouses, sunlight greenhouses, simple plastic arch sheds, etc. Among them, the advantages of single-span greenhouses are that they are convenient for rain drainage, and the snow load can automatically slide off when the shed surface angle is above 15 degrees. Good ventilation and heat dissipation, the disadvantages are large heat dissipation in winter, high cost, and not easy to scale up; the advantages of multi-span greenhouses are high land utilization rate, good thermal insulation performance, large span, large space, easy for mechanized and centralized management, and the disadvantages are natural ventilation ability Poor, no snow-covered load sliding function, high requirements for structural strength, high ...

AI Technical Summary

Problems solved by technology

[0002] At present, the more practical greenhouses generally include single-span greenhouses, multi-span greenhouses, sunlight greenhouses, simple plastic arch sheds, etc. Among them, the advantages of single-span greenhouses are that they are convenient for rain drainage, and the snow load can automatically slide off when the shed surface angle is above 15 degrees. Good ventilation and heat dissipation, the disadvantages are large heat dissipation in winter, high cost, and not easy to scale up; the advantages of multi-span greenhouses are high land utilization rate, good thermal insulation performance, large span, large space, easy for mechanized and centralized management, and the disadvantages are natural ventilation ability Poor, no snow-covered load sliding function, high requirements for structural strength, high cost, not suitable for places with particularly large snow volume; solar greenhouse is a more popular planting method in protected areas in northern China, and its advantages are low cost, High thermal insulation performance, but the disadvantages are low land utilization rate, small individual scale, which is not conducive to mechanized and centralized management. Although it has a certain sliding function of rain and snow loads, the increase of its single area is still limited by its structure's load bearing capacity for heavy snow loads. Ability; simple plastic arch shed is a popular planting method in protected areas in southern China. Its advantages include low cost and certain environmental control capabilities. The disadvantages are low land utilization rate and small individual scale, which is not conducive to mechanization and centralized management. Although it has a certain ability to slide under rain and snow loads, its structural strength is low, resulting in a large number of plastic sheds collapsing due to rain and snow every year

All of the above structures have conflicts between the demand for the span of the greenhouse and the structural strength, the number of pillars, and the cost. If the span of the greenhouse is increased, the pillars will be added, which will lead to inconvenient operation management; or the structural strength will be increased to increase the strength standards of beams and pillars. , leading to a substantial increase in cost, and a substantial increase in its self-weight load

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