Arch column fixed two ways to get
Fixed card slot card slot to choose U-type card slot, U-card slot stuck on the column, with a rack to support the column and the support to be fixed, up and down only two can be used. This kind of card slot can be reused, and the effect is stronger than steel wire and bamboo board. At the same time, the U-shaped slot is fitted with the fixing piece, so that the column can reduce the shaking.
After the pillars are installed, after all the pillars are buried, a steel wire can be pulled on each row of north and south poles as a pillar pulling wire. The purpose is to connect the same row of pillars together by pulling wires, thereby improving the firmness of the booth. During operation, a steel wire can be pulled horizontally from the top to the bottom 20 cm from the top to the bottom of the same column, and the transverse steel wire is fixed on the column through the wire to play a role in connection and fixation. What needs to be emphasized is that the fixing of the two ends of the cable is very important. In order to save two lands in the greenhouse, it is recommended to lay anchors in the sheds and set up pillars to fix the cables.
Improve the transparency of the film inside and outside to be good
Doing a good job of cleaning the external dust During the use of the film, some measures taken by the vegetable farmers are not conducive to the removal of dust from the film. The first is the use of straw curtain as the cover of the greenhouse, the straw straw protruding from both sides of the straw is easy to tie holes in the film, because the moisture spill in the greenhouse, outside the film and the dust condensation. The second is to add a layer of film on the bottom of the cover. This will make the pollution to the film more serious. After the dust has absorbed moisture, it will have stronger adhesion on the film and will not be easily removed with wind, precipitation, etc.
Therefore, for the accumulation of external dust, dust strips should be set reasonably at the same time, and dust removal measures with good results should be adopted. If a dust cloth strip is set every 3 meters or so, the degree of tightness should be such that the two dust cloth strips do not overlap or wind on each other under the condition that the wind blows naturally.
Efforts should be made to eliminate condensation on the inner side of the film. If the film is poor in dripping and dripping, a large number of water droplets will accumulate on the film, which will refract the light and make the direct light through the film become Scatter light, causing the illuminance in the shed to decrease.
The antifogging agent on the film is effective for a period of time. Generally speaking, the effective period is about 3 to 6 months. When the antifogging agent disappears, the film will lose its function. Therefore, whether in the selection of the film or during use, it is necessary to ensure that the anti-fog and dripping performance of the film is in the best period. After the expired greenhouse film is replaced with a new one, high temperature occurs in the greenhouse. If a large amount of chlorine- and sulfur-containing chemicals are used, the demography of the greenhouse film will be reduced. At the same time, the shed surface is flat, and there are wires, bamboo poles, and other objects under the film to block, which can also result in poor drip performance.
Prevent floating membranes on both sides
The purpose of laying the floating membrane in the shed is to use for thermal insulation, and secondly, to resist the attack of strong wind on the shed cover. The northwest or northeast winds often occur in winter, which greatly damages the fixing of the floating membrane on both sides. The approach taken by many vegetable farmers is to press soil bags, usually when the wind is relatively large. The bag compression film easily causes loosening of the shed film in the booth, and the gap between the two bags is more likely to enter the wind.
When the wind is below level 5, the rope can be used alone. After the floating membrane is put down, the upper part of the rope is fixed on the floating wire on the roof, and the lower part can be tied on a soil bag. Of course it is also possible to embed anchors in the front face and tie the ropes to the anchors. If there are conditions, you can press the pants on both sides of the floating membrane, put the rope into it, and tighten the rope tightly after covering the floating membrane every day. If the wind is large, use a soil bag to press the floating membrane while fastening the rope.
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