1) Contain a large number of critical material particles close to the separation point. That is to say, the particle size of the crushed stone is critical to the mesh size of the screen. During the screening of the stone, such particles are stuck in the mesh and cannot pass through the sieve smoothly, which is called critical hole blocking.
2) There are many materials that have multiple contact points on the screen.
3) There are many flake particles. Due to the crushing or the stone itself, there are many flake materials in the stone material, and the flake materials cannot be smoothly passed through the sieving. At the same time, the flake materials are intertwined into a net shape, which hinders other materials from sieving and blocking holes.
4) The diameter of the steel wire for the screen is too thick.
5) The screened material contains high moisture and viscous materials such as mud and sand. Because there is a lot of mud in the stone, or when the stone requires water washing, the fine-grained stone will stick to each other into agglomerates due to the intervention of water on the one hand, and the soil will stick to the screen surface on the other hand, making it difficult to screen the material and causing blockage. .
Except for the fourth type, the first and second types are inevitable. The third and fifth types are more or less existent. The fixed mesh screen cannot effectively overcome the impact of critical material particles on the screen hole. Blockage, resulting in low screening efficiency of the vibrating screen. Generally, the screening efficiency of a vibrating screen with a fixed mesh screen is less than 50%. Even if the amplitude is increased, it cannot effectively solve the blockage. Moreover, increasing the amplitude may affect the service life of the screen.
Principle of Anti-blocking of Triangular Mesh Screen
Extend the planar two-dimensional fixed holes to three-dimensional and three-dimensional variable meshes, and use the secondary vibration generated by the adjacent screen bars in the random vibration to establish an effective vibration difference, and realize the continuous change of the screen holes in the screening. There is relatively no fixed critical particle stone.
Specific approach
Among the two relatively immobile static screen bars, a movable screen bar with a relatively large vibration amplitude is set. The movable screen bar can bounce or sift the stones during the jam. According to the characteristics of the material, the relative elasticity and vibration amplitude of the static and dynamic screens can be adjusted accordingly to make the screen in the best screening state. The screening efficiency can be increased by about 30% compared to the fixed mesh screen. The self-cleaning function of the screen is realized, and the blockage of the screen hole is greatly reduced.
Features
The static screen of the screen is thicker than the dynamic screen, so it not only increases the wear resistance of the screen, but also improves the screening efficiency. At the same time, the screen bar structure of the screen can minimize the contact point between the material and the screen hole and reduce the occurrence of hole blocking.
1) Materials suitable for screening: crushed stone and gravel, limestone, iron ore, coke, sintered ore, ridge clay and similar materials.
2) The maximum temperature of the screened materials is not more than 120°C, and the ambient temperature is -40~+60°C.
3) The height of the material at the feed inlet falling between the screens is not more than 300mm.
4) The maximum particle size on the screen surface is not more than 5 times the size under the screen.
5) Chemical resistance. Acid and alkali are suitable for pH 4~9, and stainless steel wire can be used for those with stronger pH.
6) Maximum feed weight. When the screen is screened by a horizontal vibrating screen, the thickness of the material layer should not be more than 5 times the aperture.
Insect netting is a type of mesh material that is widely used to protect plants from insect pests. It is typically made from a fine, lightweight fabric that is woven from synthetic fibers such as polyethylene or polyester. Insect netting is used in a variety of horticultural and agricultural settings to protect crops and plants from insects that can cause damage or spread diseases.
READ MORE: Learn about anti-hail netting >
The netting is placed over plants or placed around them in a frame, creating a physical barrier that prevents insects from reaching the plants. Insect netting is also used to protect plants from larger animals such as birds and rabbits, or bad weather like hail. And it also combines the benefits of a sunshade net, which makes it an excellent choice for various applications, such as agriculture, horticulture, and residential use.
This post tells you 5 benefits of greenhouse insect netting and what you should consider when choosing insect netting for your plants.
Anti-insect nets offer several important benefits when used in greenhouses.
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Anti-insect netting is highly effective at reducing the incidence of pests in the greenhouse. Tests have shown that anti-insect nets can be highly effective at reducing the incidence of pests such as greenflies, small cabbage moths, bean pod borer moths, and American spot-winged flies by 94-97%, and aphids by 90%.
Anti-insect nets can also help to prevent the spread of viruses, which can have devastating consequences for greenhouse cultivation. Aphids are a common vector for viral diseases, but anti-insect nets can block the transmission path of these pests, greatly reducing the incidence of viral diseases in the greenhouse. The efficacy of anti-insect nets for disease prevention has been shown to be around 80%.
Anti-insect nets can help to regulate the temperature, soil temperature, and humidity within the greenhouse, creating a more suitable growing environment for crops. In hot seasons, they can keep the temperature within the greenhouse the same as outdoors in the morning and evening, and slightly lower than outdoors on sunny days. In early spring, they can increase the temperature within the greenhouse by 1-2°C, and the soil temperature by 0.5-1°C, effectively preventing frost.
Anti-insect nets can also block some rainwater from entering the greenhouse, reducing field humidity and the incidence of disease, and decreasing the amount of water vapor that evaporates within the greenhouse on sunny days.
Insect netting can provide shade, similar to greenhouse shade cloth. The shading effect of anti-insect nets can regulate light intensity, temperature, and humidity within a greenhouse, creating a more suitable growing environment for light-sensitive vegetables such as lettuce and spinach. This can help to ensure that these crops receive the optimal amount of light for healthy growth and development.
In addition to their pest control, disease prevention, temperature regulation, and shade effect capabilities, anti-insect nets can also offer several other benefits. They can reduce the use of pesticides, save energy, and lower the overall cost of greenhouse cultivation. Overall, anti-insect nets are a valuable tool for maintaining healthy and productive greenhouses.
There are several factors to consider when selecting an anti-insect netting for use in a greenhouse.
It is important to consider the type of pests you are trying to prevent. For example, in the autumn season, many pests may try to enter the greenhouse, particularly moths and butterflies. These pests tend to have larger bodies, so a netting with a mesh count between 30-60 should be sufficient. On the other hand, if the primary concern is small pests like aphids and thrips, netting with a higher mesh count of 60 or above may be more appropriate.
The size and shape of the greenhouse will also impact the type of anti-insect netting that is most suitable. For example, if the greenhouse has a large surface area and high ceilings, netting with a higher tensile strength may be necessary to ensure its stability and durability. Similarly, if the greenhouse has an irregular shape, custom-made netting may be required to ensure proper coverage and protection.
The type of crops being grown will also influence the selection of anti-insect netting. Some crops may require more or less light, temperature, and humidity, so it is important to consider these factors when selecting a netting that will create the optimal growing environment. For example, lettuce and spinach may benefit from netting with a higher shade effect, while tomatoes and peppers may prefer more sunlight.
The climate and weather conditions in the region where the greenhouse is located will also impact the selection of anti-insect netting. For example, in areas with hot and humid climates, netting with good ventilation and heat resistance may be necessary. In colder regions, netting with good insulation and frost resistance may be more appropriate. It is also important to consider the potential for wind and other weather events when selecting a netting that will be able to withstand harsh conditions.
Finally, it is important to consider the cost and durability of the netting when making a selection. While it may be tempting to choose a cheaper option, it is important to consider the long-term costs and benefits of different netting options. If you’re looking to purchase insect netting for personal use, you can find a variety of garden netting options from online retailers like Amazon and eBay. These websites offer a convenient and easy way to shop for insect netting from the comfort of your own home. However, if you operate a large farm, you may want to consider purchasing your insect netting directly from suppliers. These suppliers may be able to offer insect netting at a lower price and in larger quantities, making it a more cost-effective option for your farm.
In general, higher-quality netting will be more durable and may have a longer lifespan, ultimately leading to a lower overall cost. It is also important to consider the maintenance and repair needs of different netting options to ensure that they will be able to provide long-term protection and value.
Anti-insect netting is a valuable tool for maintaining healthy and productive greenhouses. It offers numerous benefits, including pest control, disease prevention, temperature regulation, and shade effect. When selecting an anti-insect netting, it is important to consider the specific needs and circumstances of the greenhouse in question.
This includes the types of pests to be prevented, the size and shape of the greenhouse, the type of crops being grown, the climate and weather conditions, and the cost and durability of the netting. By taking these factors into account, it is possible to choose an anti-insect netting that will provide optimal protection and support for greenhouse cultivation.
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