What are the common insulation measures in greenhouses?

Irrigating vegetables in the greenhouse before the arrival of cold weather can increase the temperature of the soil and air in the greenhouse. Due to the large heat capacity of water, even if the cold snap invades the winter insulation problem, the temperature drops sharply, and the water in the greenhouse is frozen and frozen, which needs to absorb a lot of heat, so it can ensure the normal growth of vegetables in the greenhouse.

In case of even cloudy days, when the sunlight is seriously insufficient, and the outdoor temperature of the greenhouse drops sharply, several stoves can be set up in the aisle of the greenhouse to increase the temperature in the greenhouse by burning coal, but fire prevention measures should be taken to prevent and control fires.

Before the arrival of cold weather, light crop straw, firewood and grass around the outside of the greenhouse, and use the hot smoke generated by it to disperse the cold around the greenhouse, so that the temperature around the greenhouse rises, so as to ensure that the temperature in the greenhouse is increased and the purpose of resisting the cold current is achieved.

The thermal insulation quilt not only has a better thermal insulation effect than the Chuanzong straw curtain, but also the surface of the thermal insulation quilt is smooth and soft, which can prevent scratching the film and causing air leakage and cooling in the greenhouse. When the weather is fine, pull up the insulation quilt to raise the temperature of the greenhouse, and when the weather is bad, the insulation will be put down to keep warm, which can reduce the heat loss in the greenhouse and avoid the temperature reduction affecting the growth of plants.

In the process of curing, it can also be appropriately applied with fertile leaf fluid fertilizer to increase the ground temperature.

For greenhouses, plant heating, industrial workshops, drying rooms for large-area heating, what we need is high heating efficiency, economical, after all, thousands of square meters of workshops need to spend a lot of heaters, but also easy to clean, otherwise the large space, as well as machine work, easy to accumulate dust, and high-frequency welded fin tube heating and light pipe heating is exactly what people need. Industrial finned tube radiator is a kind of radiator developed in recent years by finned tube, light tube plugging and welding as one of the heat dissipation efficiency, high pressure, energy saving, its specifications and models are divided into 40-114 range, mainly used in greenhouses, large workshops, office workshops, stations, airports, coal mines, due to the thick pipe diameter, large water capacity, high heat dissipation, good thermal conductivity effect of peripheral fins, is several times or even dozens of times the heat dissipation of general radiators, can greatly save on cost, It is ideal for many industrial heating. Therefore, it is recommended to use steel finned tube radiators and steel optical tube radiators.

Finned tube radiator.

Steel tube aluminum fin finned tube radiator. The current steel fin heat pipe is processed by high-frequency welding equipment, and the standard steel strip is welded around the internal base pipe in a spiral structure through this equipment, so that the fin and the internal steel pipe are combined as a whole, so as to ensure that the fin will not be affected by the alternation of cold and heat, resulting in detachment.

Finned tube radiator.

At the same time, the steel tube aluminum fin heat dissipation pipe no longer uses the winding treatment method, but the corresponding specifications of the steel pipe and the aluminum tube are sleeved together, and the aluminum tube is extruded and rolled out of the aluminum heat dissipation fin through the outside of the steel pipe through the equipment, so as to ensure that the aluminum fin type is wrapped around the steel pipe as a whole. The finned tube uses the high-frequency electrical induction generated by the high-frequency generator to produce high temperature at the contact between the surface of the tube and the fin, dissolves the two at a depth of about 101m, and then pressurizes the fin and the tube to become one. No flux, no solder, simple manufacturing, high productivity.

Finned tube radiator.

At present, the finned tube radiator is widely used in steel and aluminum finned tubes (winding steel-aluminum composite finned tubes, rolled steel-aluminum composite finned tubes), which make use of the pressure resistance of steel pipes and the efficient thermal conductivity of aluminum, and are compounded in special machine tools. The contact thermal resistance is almost zero at 210 °C. Steel-aluminum composite tube radiator has the irreplaceable advantages of other types of finned tube radiators.

Finned tube radiators are generally used to heat or cool air, and have the characteristics of compact structure and large unit heat exchange area. It is widely used in textile, printing and dyeing, petroleum, chemical, drying, electric power and other fields.

Finned tube radiator.

Do not use the most common heating, that is, artificial heating, this way of heating is relatively simple, and the effect of special-shaped is better.

1: Greenhouse insulation is prepared before the shed.

1. The purchase of greenhouse insulation is used by a special roller shutter machine, because the insulation is thinner than the grass straw, can not use the large head of this Li Dong roller shutter machine.

2. The horizontal winding rod of the roller shutter machine should have a fixed nut every other meter to facilitate the welding wire to fix the insulation quilt.

3. Prepare sandbags and connecting ropes for the east and west walls of the greenhouse, and a nylon rope (belt) of the same length for thermal insulation

Second, the application of thermal insulation quilt.

1. The connection between the two beds of thermal insulation quilt should not be less than 10cm, and the nylon rope (belt) under the thermal insulation quilt is fixed on the iron rod of the greenhouse machinery, and the upper end is fixed on the steel wire. After the insulation quilt is installed, there is a connecting rope to connect the insulation quilt lap joint.

2. The insulation quilt should be fixed on the top of the wall on the back wall of the greenhouse, so that the top of the wall has a certain inclination to the north, and covered with a complete tarpaulin (paper) to facilitate the discharge of rainwater and prevent soaking the insulation quilt.

3. When the insulation is covered at the bottom of the greenhouse, the water on the ground should be removed in time to prevent the insulation quilt from being wetted. When conditions permit, place old grass at the junction of the ground and the greenhouse film to prevent the insulation from touching the ground.

4. After the insulation is covered, the east and west walls of the greenhouse should be pressed 30cm and pressed with sandbags to prevent it from being blown up by the wind and reduce the insulation effect.

Summary. Common greenhouse insulation methods are brewing heat heating, electric heating, plumbing heating, warm air heating, solar energy storage system heating, etc., in the current era of energy conservation and emission reduction, the more recommended method is to choose solar energy storage heating system. The heat energy intercepted by the high temperature air that appears in the upper part of the shed is stored in the ground to increase the ground temperature, and when the night temperature is lower than the ground temperature, the energy stored in the soil can be dissipated into the air.

Through the use of solar energy storage systems, the ground temperature in the greenhouse can be increased by 1 2.

Common greenhouse insulation methods are brewing heat heating, electric heating, plumbing heating, warm air heating, solar energy storage system heating, etc., in the current era of energy conservation and emission reduction, the more recommended method is to choose solar energy storage heating system. The heat energy intercepted by the high temperature air in the upper part of the shed is stored in the ground to increase the ground temperature, and when the night temperature is lower than the ground temperature, the energy stored in the soil can be dispersed into the air. Through the application of the solar cherry tree storage system, the base temperature in the greenhouse can be increased by 1 2.

The above are the greenhouse insulation measures, oh pro [eat whales].

We can increase the thickness of the back wall of the greenhouse from the bottom and top meters to the bottom meter and top meter, and the thickness of the side wall from the bottom meter and top meter to the bottom meter and top meter. With this method, the temperature of the greenhouse can be increased by at least 2-3 degrees. Increase the thickness of the covering cotton curtains.

The greenhouse heating block is more convenient to use and can be ignited with a lighter. It is understood that the common heating block is divided into two types: combustion block lighting and combustion block lighting. The weight of different brands of heating blocks is different, and the burning time and amount per mu are also different.

<> it should be noted that the heating block should be kept away from combustibles and not too close to the plants to prevent the plants from being roasted. Keep the fire facing up to prevent smoke. Because more carbon dioxide is produced after combustion, remember to ventilate before entering the greenhouse.

It converts some of the light energy into heat. The water droplets and dust on the shed film have a great impact on the light conditions in the shed, so it is necessary to clean and scrub the shed film frequently.

Now, most of the cotton curtains covered by greenhouses are generally 2-3 cm thick, if we increase the thickness of the covered cotton curtains to 5 cm, we can effectively increase the temperature in the shed by 3-5 degrees. Now it's only about 17 degrees. If you put the quilt down now, you can open the stove later and save some coal.

This hot blast stove needs about 100 catties of coal a day, and burns high-quality washed coal, which is 950 yuan per ton. "

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When building a greenhouse, we must first choose the right site, have enough sunlight, and choose a good quality plastic film, so as to have the best sunlight absorption rate and achieve the best thermal insulation effect. In the large basin, you can pull the wire, use physical insulation, adjust the orientation of the greenhouse, and choose a plastic film with good light transmittance, which are all very good insulation measures.

You can use some clothing or plastic sheeting to keep warm outside. You can cover some things on the outside of the greenhouse, you can also adjust the temperature in the greenhouse by the machine, you can water in the greenhouse, you can use transparent plastic film to decorate the greenhouse, and you can also use black plastic film to wrap the greenhouse, so that you can better absorb heat and keep warm.

The surface of the greenhouse can be covered with a layer of plastic film, so that it can be better insulated and warmed. You can place some machinery and equipment in the greenhouse, don't open the door of the greenhouse often, pay attention to the watering and fertilization in the greenhouse, and also pay attention to the use of some temperature equipment, so that you can better maintain the temperature.

It is necessary to remove the accumulated blood in time, to properly ventilate, and to get proper exposure to the sun. You can add some greenhouse insulation quilts, and you can also add some films.

1. Dig a cold-proof ditch in front of the shed. Dig a flat bottom ditch with a depth of 0 5m and a width of 0 4m on the outside of the front of the greenhouse, pad a layer of old film, and then fill in straw, and cover it with a layer of film to prevent water leakage. This avoids the transfer of soil heat from the shed and prevents the roots of the frontier crops from being damaged by low temperatures.

2. Build a windshield behind the shed. On the north side of the greenhouse, along the east and west directions of the shed, a wind barrier with a certain slope is built with reed stalks and corn stalks, plus a layer of old film, which is not only conducive to blocking the wind but also plays a reflective role.

3 Cover the shed with straw curtains. After sunset and before sunrise, the shed is covered with a straw curtain, and the inside of the straw curtain is made of cattail grass or straw, and the outside is connected with reed flowers to form a mulch with a thickness of 0 04 m and a width of 2 m. It can also be covered with straw curtains alone to enhance its heat retention.

4. The inner wall of the shed film is coated with SN. After the ordinary film is sprayed with SN waterproof drops, it is not easy to form water droplets on the film, and the light transmittance can be increased by about 35. At the same time, the dust and debris on the film should be removed in time.

First, multi-layer coverage, greenhouses, small sheds, mulch, skirt film, and straw curtains.

The second is to choose a non-drip shed film.

The third is to prevent the shed film from being damaged and strictly keep it sealed.

Fourth, select low-temperature tolerant varieties, cultivate strong seedlings, grasp the timing of sowing and transplanting, and overwinter after transplanting and surviving, or transplanting after winter.

Fifth, sprinkle grass ash around the plant.

Sixth, at night, the small arch shed is covered with straw curtains or covered with insulation materials such as non-woven fabrics or paper quilts.

Seventh, it is necessary to carry out cold-resistant seedlings before winter, do not raise the temperature of the shed too high, and strictly prevent the growth of plants.

Eighth, increase the light transmission of the shed film, clean the shed surface frequently, keep the shed film clean, and remove the shade cover early and cover it at night.

Nine is to spray antifreeze before the cold wave, such as Tianda 2116, Bihu, etc.

The tenth is to start M-shaped high ridge furrow cultivation to increase the soil surface area, increase the soil temperature, and increase the night air temperature with high soil temperature.

Eleventh is to take warming measures when the temperature is below zero, such as electricity, light bulbs, stoves, etc.

Twelfth is to add an insulation layer outside the facility, such as covering a layer of 10 20 cm thick broken grass or corn stalks on the back wall and gable of the greenhouse, and covering the grass with film, which can prevent the release of indoor heat to the outdoors and significantly increase the indoor temperature.

When it comes to greenhouse insulation, it is believed that everyone is very familiar with it, it is a necessary equipment for agricultural planting, ensuring the normal growth of crops and providing a good growth environment. In order to give you a better understanding of the thermal insulation quilt, then below.

1. Heat the fire.

Furnace heating is the most commonly used traditional heating method with a long history. A fixed stove can be used, or a makeshift stove can be used for heating. Furnace heating is mainly used in greenhouses, and later with the development of plastic greenhouses, it is also gradually applied to the production of greenhouses in early spring.

2. Warm up with hot water.

Use heating pipes and radiators to heat the heat. The use of hot water heating method in China is not very common, and it is only used in large-scale glass cracked glass greenhouses and contiguous concentrated greenhouses. The advantages are:

It is conducive to the heating of large-area greenhouse groups; When heating, the indoor temperature can be kept uniform, which is convenient to promote the rise of ground temperature; The residual heat has a long time, and there is a period of heat preservation after the heat is stopped; There are no harmful gases and soots.

3. Steam heating.

It is less used in our country, and its heating method, the advantages and disadvantages are the same as that of hot water heating, but the hot water is changed to hot gas, and it is also convenient for soil disinfection. It can use the waste heat and exhaust gas of the power plant to combine with agriculture.