A new type of thickener-lifting thickener

 Thickener is a continuous working thickening and clarification equipment, mainly used in the dehydration of tailings slurry in wet beneficiation operations, and also widely used in the thickening and purification of solid-containing slurry such as steel and sewage treatment. According to its driving mode, the thickener can be divided into two categories: peripheral drive thickener and central drive thickener. Peripheral drive thickeners have integral rake lifts to varying degrees, especially the secondary rake in the cone pit. , It will cause the defects of pressure rake. Although the central drive thickener can lift the rake, when the load-bearing bridge is too heavy or the central drive torque is too large, a new type of thickener-automatic rake thickener appears.

When the thickener is working, the motor, reducer and drive transmission equipment rotate along the thickening tank, the transmission device will drive the central support through the transmission bridge and the central support, and the rotating support will drive the sliding frame through the sliding key , The sliding frame is connected to the rotating cage, and the long and short handles and the vice handles are driven by the rotating cage. The rake teeth of the long and short rake racks will scrape the sedimentation material in the thickening tank into the cone pit of the thickening tank, and the role of the vice handle will prevent the cone. The underflow material in the pit is consolidated to ensure the smooth flow of underflow sludge.

When the material settled to the bottom of the thickening tank increases, when the bed layer thickens, the working resistance of the rake will increase. When the working resistance is adjusted to a set value, the transmission device will stop rotating and the rake cylinder will be lifted. Drive the sliding frame, the whole will be lifted up, and the working resistance will be reduced subsequently, but if it is reduced to a certain level, the rake will not be lifted, and the rake frame will stay at this height for rotating work until the lowest When the working resistance increases to the set value again, the rake frame will be raised again, repeating the action, so as to achieve the purpose of automatically raising and lowering the rake.

Peripheral transmission automatic rake-lifting thickener includes transmission device, center support, transmission bridge frame, rotating cage, long and short rake frame vice handle, distribution device, trough frame, hydraulic system, electronic control system, etc.

(1) Transmission device.

The transmission device can be driven by a motor reducer or a sub-motor. The transmission mode can be a rubber wheel, a knurled wheel or a gear drive to meet different work needs.

(2) Center support

The central support is a composite structure, composed of a fixed support, a sliding frame, a rotating bracket, and a seat ring. The transmission device drives the central support to rotate through the rotating bridge frame. When the rake is lifted, the hydraulic cylinder will lift the central support sliding frame to make the whole Lifting, so that it can not only show the driving torque, but also can lift part of the lifting according to needs, the structure is more novel.

(3) Transmission bridge

One end of the transmission bridge is connected with the central support rotating bracket, and one end is connected with the transmission device. However, because the central support adopts a specific device, the bridge does not move laterally with the lifting part of the thickener, which prevents the transmission device from being in the center. It can increase the axial force generated when part of the lifting, avoiding the phenomenon of rubber wheel degumming. Determine the transmission mode and other transmission modes.

(4) Extraction of automatic rake signal

There are two ways to extract the rake signal of the thickener. One is an independent mud control resistance detection device. It is mainly composed of force measuring box and sensor. The force measuring device is installed on the mud scraper near the cone pit. During the operation of the equipment, the force receiver directly contacts the deposited sludge. During the operation of the equipment, the force receiver directly contacts the sludge. The resistance during mud scraping is transmitted by the secondary instrument to the PLC controller of the control system. A pressure sensor, hydraulic pump and various control valves are installed in the hydraulic pump station. The mud scraping resistance is detected by the pressure sensor. The hydraulic signal will be converted into an electric signal, and the PLC program controller will issue an instruction, so that the rake lifting cylinder can move and realize automatic rake lifting.

(5) Cloth device

Ordinary center drive thickener feeds the material directly from the center of the pool. The particles in the slurry can’t settle sufficiently. The sedimentation layer that has been deposited is destroyed due to the erosion of the liquid flow, and the material that has been deposited is removed. Rushing affects not only the concentration of overflow water, but also the sedimentation effect of particles.

The peripheral drive center automatic rake-lifting thickener combines the advantages of a peripheral drive thickener and a central drive thickener. This machine not only has the advantage of large transmission output torque of the peripheral drive thickener, but also has the central drive thickener that can lift the rake as a whole It also avoids the thickening machine from being too bulky. Therefore, the large-scale and intelligent thickening machine can be realized, which is a direction of the thickening machine.

http://centrumpelplin.pl/