A new type of soil crushing machinery

High-grade roads and large-scale construction facilities need to stabilize the foundation, that is, the soil is broken into powder and small particles, and then mixed with additives such as lime to evenly compact and compact in some backfill constructions such as oil and gas pipelines, bridges and culverts, and large canals. Filling with soil that has been broken into uniform small particles; soil fragmentation has become an important process link in modern engineering construction. Since the soil may contain stones, bricks and other hard materials, it may be due to high water content and sticky, and the high productivity required (hundreds of tons per hour above, therefore, the soil must have a high mechanical crusher production capacity, The crushing ability is strong, the finished material is fine, the particle size is small, and the working part is strong in abrasion resistance, especially for the mixed soil with sticky, soft and hard materials.

Use extrusion. The stone crusher working on the principle of hitting is suitable for crushing hard materials. It is used for viscous soft soil crushing and bonding hairpins and extruded cakes. The soil crushing machine working by cutting principle will be stuck when it encounters earth and stone mixture. Stop and damage the tool.

At present, there are multi-stage screening equipment used in the project, that is, the large-sized materials of different specifications are separately crushed by special equipment through screening or continuously sieved on a reciprocating screen, and broken by collision between particles; There are single or double roll squeeze crushers; there are also fly hammer impact crushers. These machines have their own shortcomings. In order to meet the object generally single, low productivity, can not be efficiently soil containing crushed stones and high clay soil, as well as the screening, conveying, crushing, etc. pressing member integrally combined into a complex structure of the combined crusher, In order to complete the soil crushing operation of mixing hard and soft materials, it is obviously inconvenient to use. The cost is awkward.

At present, there is no recognized earth-breaking machinery with mature principles, simple structure, convenient and reliable use, and wide adaptability. This is a wide variety of existing earth-moving machinery. In recent years, patent applications for broken soil principles in Europe, America, and Japan have been evident. In a certain sense, the innovation of a new principle applicable to the earth-moving machine is much more difficult than the imitation of a large-scale technology-intensive product, which is more difficult and far-reaching.

In recent years, the construction of high-grade highway subgrade stabilized soil requires the construction process of plant mixing machine and soil crushing has become an obstacle to the promotion of this process. Therefore, it is very necessary to develop and produce an ideal earth-moving machine. The ideal crusher should be characterized by high productivity, meeting the requirements of 300 tons to 600 tons per hour or more for road construction; directly and effectively crushing soil containing stones without sorting: simple structure, direct use of loader Feeding) Convenient, reliable work, price: suitable; there is overload protection against card death; the quality of broken soil meets the requirements of construction specifications.

An on-site inspection conducted from construction sites in northern Shaanxi, Henan, and Shandong found that an innovative stone crusher has the necessary features of the above-mentioned ideal earth-moving machine.

The working device of the crusher is a high-speed rotating: the cutter-arm milling drum, which uses a combination of cutting, striking, squeezing, pressing, and grinding to break the soil material containing stones, which is hard and hard to break. Large piece of hard (200mm diameter stone material, which can be stored in the inner space of the drum with the rotation of the drum, in the upper part of the studio: 1/4 of the circumference of the hollow section with a row of stone openings, large stones in the It is discharged from the stone discharge port under the action of centrifugal force. The broken soil, weathered soft stone, gravel and the like are taken from the machine; the square screen is forcedly squeezed out to become the finished material.

The screen and crushing knives of the row crusher have self-cleaning ability and will not be blocked by cohesive soil; the arching device has a broken arch device to avoid sticking or bulk material arching by electric drive and low speed high torque motor direct drive In both ways, the former is slightly less expensive, but the latter performs better. The hydraulic drive driven by diesel engine has strong starting capacity, reliable safety protection and is suitable for places with inconvenient power supply.

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