Ribbon type plastic film greenhouse technology scheme
In recent years, the greenhouse industry has developed very rapidly. With the country's strong support for agriculture, modern agricultural facilities have sprung up like mushrooms after a rain. Thin film greenhouses have received widespread attention from many new agricultural practitioners due to their economical and practical construction cost. Although this kind of greenhouse is economical and practical , but there are still many disadvantages. For example, the hot air in the greenhouse is not easy to discharge, and the top window needs to be closed in time when it rains. The opening of the window is likely to cause damage to the film, the top has poor drip-proof performance, it is not easy to seal, and the thermal insulation performance does not meet the requirements.
Conventional Venlo greenhouses basically use PC boards or glass as covering materials. This scheme adopts Venlo greenhouse skeleton structure and covers multi-functional plastic films. It not only has the advantages of structure space and shape of the general Venlo-type greenhouse, but also has the performance advantages of low cost, high light transmission and multi-functionality of the plastic film greenhouse.
Most of the traditional plastic film manufacturers use roll film to open windows on the top, and a small amount of racks are used for eversion windows. It is difficult to avoid water leakage and poor sealing performance. In the plastic film greenhouse structure, the scheme adopts the electric track type eversion roof opening window, and develops special window opening aluminum profiles, which overcomes the drawbacks of the traditional plastic roof opening window.
The advantages of the Wenluo plastic film greenhouse
1. It has the structural characteristics of a general Venlo-type PC board greenhouse. Large space, strong bearing capacity, good-looking appearance, easy to match other facilities such as shading, fill light, sprinkler irrigation and so on.
2. The cost is relatively low and the cost performance is higher. Compared with the greenhouse covered with PC board or glass, the material cost and installation cost of the corrugated greenhouse covered with plastic film are much lower. According to the construction scale of about 3000 square meters, including the basic configuration greenhouse including foundation, skeleton structure, covering doors and windows, internal shading system and control system, if it is made into a Venlo-type PC board greenhouse, the construction unit price is about 300/㎡. Low-style plastic film greenhouses have a large difference in the cost of covering materials, and the cross-section of structural materials is smaller, and the installation labor cost is also lower, and the construction unit price is about 200 yuan/㎡. Compared with the cost savings of nearly 100 yuan per square meter, the cost performance is quite obvious.
3. Greenhouse functions are more targeted and have more uses. With the development of various functional films, according to the growth needs of different crops, choosing to cover this functional plastic film can improve the quality of the crops and increase the economic benefits of users. For example, with the use of diffuser film, there is no shading in the room, and the crop production is very uniform. Covered with black grid film, it can shade part of the direct light, and shade-tolerant plants can be planted indoors, and it can also be used as an office area. These exclusive functions are difficult to achieve in general Venlo-type PC board greenhouses or glass greenhouses.
4. The greenhouse lighting performance is better. Covered with plastic film, the cost is low. The manufacturer generally guarantees a 5-year warranty, but it can be replaced once every 5-8 years. Although the PC board or glass has a long service life, the lighting performance is not as good as new due to the accumulation of dust and moss in the later period. plastic film.
5. The ridge track-type staggered everted window is adopted. Compared with the conventional roll film window, the ventilation efficiency is higher, the cooling is fast, the energy consumption is small, and it is not easy to leak.
6. The special aluminum alloy is used as the window frame of the top window, which is easy to tension the plastic film. It can install the insect-proof net and add the sealing strip, which has good insect-proof, sealing and thermal insulation effects.
