Upwards-dialing and cutting type coal sample division device and division methods

Abstract

The invention discloses an upwards-dialing and cutting type coal sample division device, comprising a division device body which includes an outer frame, a conical reshaper, a division dialing plate and a split baffle, wherein the top of the outer frame is provided with a sample inlet, the shape of the top of the conical reshaper is matched with that of the sample inlet, the area of the top of the conical reshaper is more than that of the bottom of the same, the lower end of division dialing plate is fixed on the outer frame by a rotary mechanism and above the split baffle , and the bottom of the outer frame is divided into two sample outlets by the split baffle. The method also provides two division methods; through the two division methods, divided samples can meet international requirements, in the division process, no leakage points exist; as the division dialing plate upwards dials and cuts coal samples, the coal flow has short contact time and area in the division device, the divided coal samples are representative, and the problems of moisture loss, particle size segregation and being easy to cause dust are overcome; the upwards-dialing and cutting type coal sample division device has greatly improved division precision than existing equipment.

Description

technical field [0001] The invention belongs to the technical field of coal sample reduction and division, and in particular relates to a device and a division method for reducing and dividing coal samples in the coal sample preparation process. Background technique [0002] Analyzing the quality of industrial coal requires three processes of coal collection, sample preparation, and testing; the process of sample preparation is to make the collected coal samples into samples of certain specifications according to the national standard test requirements. In the process of sample preparation, the coal sample needs to be divided (divided is the process of taking a representative small sample in proportion from a large number of samples), and this step usually uses a mechanical divider accomplish. [0003] The working principle of the mechanical splitter is to take out a part or several parts from the sample by cutting the sample. It can reduce the bias caused by manual me...

AI Technical Summary

Problems solved by technology

The same problem exists in both conical and inclined tube funnel shapes. Its mechanical structure and control are relatively complex, the adjustment range of the reduction ratio is small (<50%), and the sample adaptation range is small, which limits the weight range of incoming samples. , affected by the cutting speed and the length of the sample flow path, it is easy to cause moisture loss

2. "Cutting trough splitter", such as image 3 As shown, its working principle is that the cutting groove passes through the entire section of the coal flow and intercepts a part of the sample from the coal flow. The coal not intercepted by the cutter flows through an inclined plate to be discharged and discarded. Fully sealed, material leakage and dust are likely to occur when receiving and discharging materials, so there is a problem of particle size segregation

The slotted belt divider is a belt structure, and the chain bucket divider is a chain plus bucket structure, which is very bulky and difficult to seal

To sum up, the above-mentioned problems exist in the existing dividers, which affect the bias of the divided samples, making the actual effect of industrial products not good, and usually cannot meet the requirements of the national standard

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