Joint-type sheds have double ridges and multiple ridges. This type of greenhouse has a large area of ​​use, the surrounding area is reduced in the low temperature zone, the material is saved, the gas pressure is stable, and the working conditions are improved. However, it is not wind resistant, is not resistant to snow pressure, is quasi-maintained under strong winds, and is prone to wind disasters. Affects crop growth.
The single-story greenhouse is divided into two types: arched and ridged. The single-story arch roundhouse is widely used in suburbs of Beijing. It is easy to construct, easy to draw, and has a solid structure. It is easy to fix the film, resists wind and snow pressure, and is easy to maintain and maintain. There are many drawbacks to the ridge type, which is rare in the suburbs of Beijing.
Semi-arched greenhouses have developed rapidly in Heilongjiang, Liaoning, Jilin and Shandong provinces. The northern wall is built, and the arch is set in the south. It is semi-arched and is equivalent to the solar greenhouse (plastic shed) in the Beijing area. The shed is well-lit, warm, wind-proof, easy to warm, and set up the exit device. Do seedlings, seedlings or direct cultivation.
The bamboo and wood structure greenhouses are made of wood poles, bamboo poles for arches and tie rods, wire rods for connection and fixing into skeletons, and a large film made of thin film. This is a preliminary, simple form. Its disadvantage is that the columns are numerous, causing shading, inconvenient operation, poor solidity, and perishable parts of the wood column. However, the cost is low and the materials are convenient. The cost per acre skeleton is only about 2,000 yuan.
The main pillar of the bamboo-wood-cement hybrid structure shed is a cement pillar, and the bamboo and bamboo are the arches and tie rods. Compared with bamboo-wood structure sheds, the structure is firm, and wind and snow resistance is strong. In the columns, false columns can be added, the number of columns can be reduced, working conditions can be improved, and the disadvantages of perishable parts of wood columns can be overcome. The cost is slightly higher than that of bamboo-wood sheds and is economically applicable. Beijing's suburbs are mostly of this type.
The keyed rib structure welded greenhouse can be welded into a single truss using different types of round steel, embedded in the ground through a cement foundation at a distance of 120 cm, and can be fixed and arched by using a keystone or steel pipe or a rabbit key between the trusses, or Three round steel rods (12-14 mm in diameter) are used to form a triangular flower beam structure through wire rods. A flower beam is placed every 8 to 10 meters. It is fixed to the ground through a cement grave and passes through 6-8 paths. Reinforced 'or iron angle, the key tube) and the rod welded into the scorpion, and welded to the short column to support the arch of the false column. In order to make the fixed arch rod secure, the top end is welded with au-shaped iron. The arch rods are mostly made of bamboo. The steel bars have no pillars or a row of active pillars, which are put down when the winds and snows are heavy, and are usually lifted. , Easy to set double insulation screen, but the use of large amounts of steel, more investment, its own weight, easy to deformation in the event of strong winds and heavy snowfall, severe collapse will cause serious, and steel rust seriously, the Beijing suburbs in recent years, little development.
The design of greenhouses was carefully calculated by greenhouse manufacturers. A good greenhouse design needs to take into account a lot of things will be completed, the greenhouse light transmittance is better, good moisturizing performance, easy operation and ventilation, better moisture removal effect, the organization must be strong, easy to build and less investment. This will only be more beneficial for later use. Here we will mainly talk about the methods and steps used in the design of greenhouse manufacturers.
First of all, the design of greenhouses should be well-grounded. The depth of groundwater should be less than one meter, drainage and irrigation should be good, and the soil should be fertile. Your design is better in the second greenhouse. The third greenhouse must be designed to be moderately high in size, preferably in the north-south span, and to ensure that the sun's incidence rate. The shape of the fourth greenhouse is preferably a slope, so that when the morning sunlight enters, the temperature of the text will increase rapidly! The curved structure of the greenhouse has a strong unloading load and is suitable for large winds. Area.
Greenhouse manufacturers suggest that, in addition, we must consider the issue of the materials used. Each section of the top arch opens the sunroof partially eastwards. The main steel structure adopts a lightweight steel structure. The sides and the end faces of the greenhouse are covered with 8 mm thick polycarbonate hollow plates, and the top is covered with double-layered 15-filament films imported from Israel.
The method of filling light used by greenhouse manufacturers in designing greenhouses is very important. This will directly affect the effects and production of subsequent use. When we are breeding and growing, we need more light to achieve better yields. Plant fill light is in accordance with the natural laws of plant growth, and it is suitable for the supply of light.
Greenhouse manufacturers
The reason why we need to fill up the plant plot is because the principle of the photosynthesis of the plants using sunlight is. The longer the illumination time is used, the better the growth will be, and the better the fruit will be. Therefore, a lamp that uses light instead of sunlight to provide the light source needed for plant growth when planting is to give the plant more light, and then it can perform more photosynthesis to grow, light and crops. The growth has a close relationship.
However, plants also need to rest, so when we make a certain light up on the plants, we also need to choose how much we need to Supplement according to the specific plant conditions. Greenhouse manufacturers are able to maximize the capture of light energy, give full play to the potential of plant photosynthesis, can use the least resources to complete the largest conversion, but also to avoid plants from harm, so it will directly affect the benefits of agricultural production.
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