Greenhouse with adjustable height and gradient

Abstract

The invention relates to a greenhouse with adjustable height and gradient, which comprises a plurality of rows of main uprights and longitudinal beams, wherein the main uprights are arranged on the ground; the longitudinal beams are supported by the corresponding rows of main uprights; both sides of the longitudinal beams are provided with greenhouse top surfaces; the base sides of the greenhouse top surfaces are connected to the corresponding longitudinal beams and can rotate around the corresponding longitudinal beams; greenhouse top surface fulcrum bars are arranged between the greenhouse top surfaces and the main uprights; the upper ends of the greenhouse top surface fulcrum bars are hinged on the greenhouse top surfaces; the bar parts of the greenhouse top surface fulcrum bars are inserted on the main uprights; the width W of each greenhouse top surface and the height h of each main upright have the following relation that W=0.7-1.2h; and the transverse distance H between each two adjacent rows of main uprights is less than the sum 2W of the widths of two greenhouse top surfaces, so that the adjacent greenhouse top surfaces can be overlapped. The greenhouse is used as a multi-span greenhouse or a single greenhouse and can give consideration to the requirements on ventilation, rain prevention, sun protection, heat preservation and the like; moreover, when the greenhouse is not required, the greenhouse top surfaces can be turned over downwards, so that the ground is in a semi-open state; and the greenhouse is convenient for mechanical operation and is very convenient to use.

Description

technical field [0001] The invention belongs to the technical field of greenhouses, in particular to a greenhouse with adjustable height and slope. 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 it is convenient to drain rain, 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,...

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 it is convenient to drain rain, 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 relatively 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 construction costs, and a substantial increase in its self-weight load, especially when the snow load is considered as the main load, this is especially prominent

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