Because of the warm properties of the greenhouse, we can eat vegetables that are out of season. The greenhouse space is made up of one or more layers of heat-insulating plastic film. And through the outer membrane to prevent the loss of carbon dioxide, through the growth of internal vegetables, so that the greenhouse has a good insulation effect. But what factors we need to consider in the construction of vegetable greenhouses, the vegetable Greenhouse manufacturer will introduce to you:
1. Land leveling and laying out: according to the design scheme of the solar greenhouse, determine the azimuth Angle, determine the four corners of the greenhouse, stack the four corners of the greenhouse, and then determine the position of the gable wall and the rear wall.
2. The roof truss of buried columns for the construction of glass greenhouse for vegetables: according to the drawing, determine the position of each column and mark it with lime. Dig a pit 30 to 40cm deep and use the stone as a plinth to prevent the column from sinking. Then, the excavation plate is installed on the rear column, and the head of the plate is placed on the column, the tail of the rear plate or the rear auxiliary column. Place 3-4 purlins on the board. The roof purline is connected at the bottom of the purline, forming a straight line. Other purlins are staggered. To prevent the purline from slipping, pin a small piece of wood to the bottom of the purline to block it. Some greenhouses use only pillars to support their purlins.
Three, after covering the roof: in the purlin or rafters covered with a layer of waste plastic film, corn straw bundles on the film, and the direction of the purlin or rafters vertical. The straw or straw is then spread on top of the corn stalk, covered with a plastic film, and coated with straw puree. The back roof is made of straw and straw wrapped in two layers of plastic film, like a quilt. Compared with the common car roof without plastic film, its thermal insulation performance has been greatly improved. After the roof is covered, the joints between the inside of the roof and the back wall of the greenhouse should be covered with straw pulp.
Four. Cold trench constructed of china glass greenhouse for vegetables: a cold trench shall be dug in front of the Greenhouse, 20 cm wide and 40 cm deep.
Five, embedded bolt fixed wire and after roof pressure film line: in the cold ditch at the bottom of the greenhouse and the same length of 8 wires, through the anchor. The ground anchor is made of eight leads, which are made of iron rings at both ends. Tie a brick or wooden stick to the lead every three meters, depending on the distance between the arch rods to be buried, and place it between these fixtures.
6. Building walls: the soil used for building walls can be the soil outside the rear wall of the greenhouse or the soil below the planting surface in front of the greenhouse.If you use the concealed soil in front of the greenhouse, dig out the ploughable layer (about 25 cm thick), set it aside, and water the raw soil at the bottom. Dig the earth to make a wall, according to the thickness of the earth wall to make plywood, with just dug out of the wet soil fill, with earth tamping or electric tamping. Each layer is about 20 centimeters. After compaction of the first layer, the second layer shall be carried out until the required height is reached. The gable should be joined to the rear wall as a whole and not divided into sections. Only in this way can it be strong. If the soil is not sticky enough, mix it with wheat straw.In some areas, the soil viscosity is so low that ramming is not possible to build walls. At this time, a certain amount of wheat straw and mud can be mixed into the soil to make an adobe. When the adobe was dry, he slept on the adobe wall. When building a wall, use grass mud to seal the adobe, inside and outside the wall should also be covered with grass mud. In the construction of brick walls, the foundation should be tamped down first, and then the walls should be built. During construction, mortar is full, brick joints are built, plastering surface is plastered, the wall is plastered inside and outside to prevent air leakage. The space between the brick walls should not be too large or too small. The width of the general hollow is controlled between 5 and 8cm. Every 3-4 meters, connect the layers with bricks to improve the wall's firmness. Hollow walls may or may not be filled with slag, perlite, and straw. Only air insulation and no packing in the hollow wall without cracks. When opening the brick to seal the top, it is better to seal the top with mud chaff 30cm, so that the back wall is closely connected with the back roof and the insulation performance is improved.
Glass Greenhouse For Vegetables