Two methods to fix the arch column
To fix the card slot, use a U-shaped card slot. The U-shaped card slot is clamped on the column, and the column and the support are fixed with a frame cover. Only two can be used. This card slot can be reused and the effect is stronger than steel wire and bamboo board. At the same time, the U-shaped slot can be combined with the fixing piece to reduce the shaking of the column.
Set up the column cables After all columns are buried, you can pull a steel wire from north to south on each row of columns as the column cables. The purpose is to connect the columns of the same row into one by the cables, thereby improving the sturdiness of the shed. During operation, a wire can be pulled horizontally from north to south on the same row of columns, 20 cm from top to bottom, and the horizontal steel wire can be fixed to the column by the wire to play a role of connection and fixation. It should be emphasized that the fixing of the two ends of the cable is very important. In order to save the land at the two ends of the greenhouse, it is recommended to bury ground anchors in the shed and set up pillars to fix the cable.
To improve the light transmittance of the film
Do a good job of removing the external dust. In the process of use, some measures taken by the vegetable farmer are not conducive to the removal of the dust from the film. The first is a shed that uses a straw curtain as a covering. Straw straw protruding from both sides of the straw curtain is liable to pierce holes in the shed film. Due to the overflow of moisture in the shed, dust condenses on the outside of the film. The second is to add a thin film to the bottom of the covering, so that the pollution of the shed film is more serious, and the dust has a stronger adhesion ability on the film after moisture absorption, and it is not easy to be removed naturally with wind and precipitation.
Therefore, for the accumulation of external dust, firstly set a dust removal cloth strip reasonably, and at the same time adopt better dust removal measures. If a dust-removing cloth strip is set every 3 meters or so, the tightness should be such that the two dust-removing cloth strips do not overlap or entangle with each other under the condition of natural swinging with the wind.
Decontamination of the internal droplets is easy to dew on the inside of the shed film. If the shed film has poor anti-fogging and dripping properties, a large number of water droplets accumulate on the shed film, which will refract the light and make the direct light that originally passed through the shed film becomes Scattered light, resulting in reduced illumination in the shed.
The anti-fogging droplets on the shed film have a holding period. Generally, the holding period is about 3 to 6 months. When the anti-fogging droplets disappear, the shed film will lose the dripping function. Therefore, no matter the selection of the shed film or the use period, it is necessary to ensure that the defogging droplet performance of the shed film is at an optimal period. After the expired shed film is replaced with a new film, the shed room will generate high temperature. If a large amount of chlorine and sulfur-containing agents are used, the shed film's antifogging and dripping properties will be reduced. At the same time, the surface of the shed is relatively flat, and there are objects such as steel wires and bamboo poles blocking the film, which will also lead to poor drip performance.
Prevent the wind on both sides of the floating film with a rope
The purpose of laying the floating film in the shed is to be used for thermal insulation, and the second is to resist the damage of the shed covering by the strong wind. High winds northwest or northeast often occur in winter, which greatly damages the fixation of the east and west sides of the floating membrane. The method adopted by many vegetable farmers is to compact the soil bag, which is generally used when the wind is relatively strong. The soil bag compressing film easily causes the shed film on both ends of the shed to become loose, and the gap between the two soil bags is more likely to enter the wind.
When the wind is below level 5, you can use a rope alone. After the floating film is lowered, the upper end of the rope is fixed to the floating film steel wire on the roof, and the lower end can be tied to a soil bag. Of course, you can also bury the ground anchor in the front face and tie the rope to the ground anchor. If conditions permit, you can press the pants on both sides of the floating film, put the rope inside, and tighten the rope after covering the floating film every day. If the wind is strong, you can use the soil bag buoyant film while tying the rope.
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