The main role of the screening equipment is to classify the broken products According to the different particle size of the raw materials, the materials and installation methods of the screen network are also different

The main role of the screening equipment is to classify the broken products. According to the different particle size of the raw materials, the materials and installation methods of the screen mesh are also different.

If the granularity of the material is greater than 100 mm, the screen should choose a hard sieve surface, and the opening of the hole will be slightly larger. The steel or semi -rigid combination plate (recommended polyurethane sieve plate, the steel wire skeleton) is installed. The formula or bolt is fastened, and the installation is not difficult;

Polyurethane sieve plate

When the granularity of the material is less than 100 mm, the screen network can choose to use a software sieve (recommended polyurethane sieve), so that the screening efficiency will greatly improve. The two ends are equipped with tension hooks and hang the screen directly on the screen frame.

High -frequency vibration screen

Sieve screen material

At present, in the broken and screening, the first -level screen screen or a sieve network with a secondary or higher. The material used is generally a polyurethane screen, a rubber screen, and a steel wire woven screen.

Many users of polyurethane screens think that it is the most abrasion -resistant screen. Although the purchase cost is much higher than other sieve networks, it is very cost -effective in use. In terms of efficiency, the advantages of polyurethane sieve nets are endless, and they will not express them one by one here.

Although the screening effect of steel wire woven sieve, the screening effect is good, but its service life is short, only a few days or ten days. Therefore, in the continuous operation of the screening system, because the replacement is too frequent, it is difficult to meet the needs of large -scale continuous operations. Use it. Use it. Use it. Use it. The range is smaller.

The rubber screen has good water resistance and wear resistance characteristics, soft and easy to process, and combines the advantages of the above two materials, so it is widely used in many industrial and mining companies.

Existing problems in installation

(1) Most of the screening equipment manufacturers. When manufacturing, in order to improve the effective screening area, the support beam of the screen network is designed as a side steel plate, pressing a piece of rubber protection bar on the steel plate or lining a rubber protection bar Essence

(2) The wide vibration sieve of the sieve surface is divided into two halves. The sieve net is pressed by the pressure plate and screws in the middle, and the sieve net is tightly tightened in the direction of the sieve with both ends. This method is available for the initial installation. After multiple installations, the threads on the fixing plate with the inner thread fixed on the sieve frame will rust to death, causing the screw to be dismantled, which brings a lot of inconvenience to the maintenance. In addition, from the perspective of the screen failure, although the screen of the screen has become shorter, the situation of the sieve net friction has not improved significantly.

improvement measures

Through many practice, a effective method is summarized:

(1) Change the support beam (flat steel) to corner steel, and then lined with glue on the surface of the corner steel to reduce the rigid contact between the screen and the corner steel;

(2) Make tight bolts into butye bolts to prevent bolts from rotating when fastening bolts;

(3) Selecting a reasonable position on the corner steel requires a number of brackets. Taking a single screen as an example, in general, we design the support corner steel as three. Each sieve mesh is pressed up and down, and each sieve is pressed 6 block pressure plates. Before installing the sieve network, put the bolts on the bracket, expose angle steel on it;

(4) Powder the screen, pre -tight, and install the upper plate; then tighten the sieve network to the design requirements after the pressure plate is pressed tightly

Effect

This method solves the problem of sieve mesh, friction and other problems. The pressure plate installation is performed on it, and it is not affected by external conditions. It does not need to be treated when replacing the screen, which is very convenient and feasible. Through this improvement, the service life of the screen network has been prolonged by 3 to 4 times, while the maintenance time is reduced, which greatly reduces production costs.