The characteristic of the self-cleaning mesh is to expand the two-dimensional fixed holes of the plane to the three-dimensional and three-dimensional variable diamond screen mesh holes, and use the secondary vibration generated by the adjacent screen bars in the random vibration to establish an effective vibration difference. The self cleaning wire mesh realizes the continuous change of the screen hole in the screening, and there is relatively no fixed critical particle stone, the moving screen bar can bounce or sieve the stone during the jam. According to the characteristics of the stone, the relative elastic strength and vibration amplitude of the static and dynamic screen bars can be adjusted accordingly, so that the screen can be in the best screening state, and the screening efficiency can be improved by about 30% compared with the fixed mesh screen. The self-cleaning function of the self cleaning screen mesh is realized, which greatly reduces the clogging of the screen holes.
Sieve: Mainly used in metallurgy, coal, rubber, petroleum, chemical, pharmaceutical, automobile, ceramics, glass and other industries for solid particles, powder, screening, etc.
Filter: Mainly used for mud mesh in petroleum industry, pickling mesh in chemical fiber electroplating industry and liquid gas filtration and purification.
Protect: It is mainly used for cement construction in civil construction, raising chickens, ducks, geese, rabbits and zoo enclosures. Protection of machinery and equipment, highway guardrails, stadium fences, road green belt protection nets.
Solid: It can be used in the construction industry, highways and bridges as steel reinforcement and skeleton support.
The stone contains a large number of stone particles at the critical 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 process of the stone, such particles are stuck in the mesh and cannot be sieved smoothly, resulting in blocked holes, which are called critical blocked holes.
When the self cleaning mesh is sieved, various forms of sieve hole blockage will occur according to the properties of the material.
(1) Contains a large number of particles close to the separation point;
(2) The moisture content of the material is relatively high;
(3) Spherical particles or materials with multiple contact points to sieve holes;
(4) Static electricity will occur;
(5) fibrous materials;
(6) There are many flake particles;
(7) The wire diameter of the woven screen is too thick;
(8) For thicker screens such as rubber, the hole design is unreasonable, and the upper part is not small and the lower part is not large, so that the particles are stuck.
Because most of the material particles that need to be screened are irregular, there are various reasons for clogging. In order to effectively prevent the self-cleaning mesh from clogging, measures should be taken for the above-mentioned reasons for the clogging of the sieve holes. When the particle size of the material is fine, the sediment content is high, and the sieving particle size is small, the moisture plays a decisive role in the clogging of the self-cleaning net. When the moisture in the material is more than 5%, if the material is unconditionally dried, the industrial wire screens surface and screen hole should be selected in a targeted manner. When the moisture is greater than 8%, wet screening should be used. For materials with more flake particles, it is necessary to change the material crushing method and the particle size matching of different crushing methods. Reasonable adjustment of the screen tension is an effective method to reduce the blocking of the screen. The reasonable tension causes the screen and the supporting beam to generate a slight secondary vibration, thereby effectively reducing the occurrence of blocking. The specific method is: The tension hook is made into a constant force tension structure, that is, a spring is added to the tension bolt.