1. Positioning and stakeout
⑴Peng Dexiang. And the north-south direction is better. If restricted by the fields, the east-west direction can also be achieved, so as to avoid the oblique construction of sheds as much as possible.
⑵Specifications. The shed is 4-6 meters wide, 30-50 meters long, and 1.6-2 meters high. When building large sheds, the spacing between the sheds should reach 1.2-1.5 meters, and the distance between the heads of the sheds should be 4-5 meters, which facilitates transportation and ventilation, and avoids shade.
⑶ Stakeout. In the open area and non-ventilated places, determine the four corners of the greenhouse according to the length and width of the designed greenhouse, use the Pythagorean chord law to make the four corners at right angles, and then lay down the positioning piles, and then pull between the positioning piles. Locate the line and shovel the foundation of the bamboo frame along the line.
2, insert and tie the arch
⑴Choose frame materials. The frame material is freshly cut green bamboo, which requires a diameter of 2-2.5 cm, a length of 3.5-4.5 meters, and the upper and lower thicknesses are the same.
⑵Punch rack. Along the positioning lines on both sides of the large shed, drill holes 30-40 cm deep with steel at an equal distance of 70-80 cm from one end to the other end, and insert the base of the green bamboo into the holes one by one, so that the shoulders on both sides of the arch are high. Same, two bamboos on the same arch
The new and old, thickness should be the same as possible, and then fill the soil firmly, and then bend the bamboo poles on both sides of the same arch into an arc according to the uniform height standard, and wrap the bamboo sticks in the same direction with cloth strips or packing ropes, so that the two ends of the green bamboo are wrapped in it.
⑶ Tie the lever. Then tie the top of the arch to the two sides 60-80 cm from the ground, along the length direction, symmetrically tie 3 longitudinal tie rods. When tying, keep the original distance between the arches, and tie them as fast as possible to prevent the arch from sliding back and forth. . In order to improve the firmness of the greenhouse, 5-6 meters wide sheds must have a column every 3-5 meters, and 4-5 meters sheds can be reached. Cross-type diagonal braces are used to replace the tie rods on both sides. The method is to re-shed. Every 4-5 scaffoldings, use 4 long racks of 30-40 cm into the soil to fix them at an angle of 45° and then scaffold them to look like an "X" shape from top to bottom. Sunshine panel greenhouse
Greenhouses are an important place for vegetable and fruit planting, especially off-season vegetables and fruits. Greenhouse tubes are mainly supported by frames to place important vegetables that are irradiated by ultraviolet rays. Therefore, if the quality of the greenhouse tube is not sufficient, not only the greenhouse itself or the plants that are easily damaged, but also the lack of protection and destruction. Therefore, in production, Tianjin greenhouse pipe manufacturers will ensure the quality of pipes through the control of processing parameters. Let's learn more about it below.
The quenching of high and medium frequency surfaces is mostly, and the heating temperature is 850-950℃. Taking into account its poor thermal conductivity, the heating speed cannot be too fast, otherwise it will produce defects such as melting and some quenching cracks. High-frequency quenching requires that the matrix structure of the rectangular tube after normalizing is mainly pearlite.
Generally, the cooling technology of Tianjin greenhouse pipe manufacturers mostly adopts water spraying or spraying polyvinyl alcohol aqueous solution, the tempering temperature is in the range of 200-400℃, and the hardness is 40-50HRC, which can ensure the hardness and wear resistance of the greenhouse pipe surface Meet the customer's usage standards.
Round steel pipes are used more and more mature in greenhouse pipes, and there are more product standards and application technical regulations. When using round steel pipes, some important parts of greenhouses generally require seamless steel pipes, but seamless steel pipes are expensive, so they are used less.
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