Lifting mechanism of sampling machine

Abstract

The invention provides a lifting mechanism of a sampling machine. The lifting mechanism comprises a support frame, a scissors fork device arranged on the support frame, a three-in-one reducer, a guide rail device arranged on the support frame, and a sliding device, wherein the three-in-one reducer is arranged on the support frame and can drive the scissors fork device to stretch; the three-in-one reducer drives the scissors fork device to stretch through a lead screw nut pair; the sliding device is arranged on the guide rail device and slides on the guide rail device under drive of the scissors fork device so as to achieve a guide effect on stretching of the scissors fork device; a sampler is arranged on the sliding device. The sampler is lifted through the scissors fork device, the scissors fork device is simple in structure and small in size after being folded, more importantly, the scissors fork device is driven by adopting the lead screw nut. When the scissors fork device fails, the lead screw nut which stops working has a self-locking function, so that the safety risk is greatly reduced, and a further guarantee is provided for normal operation of the sampling machine.

Description

technical field [0001] The invention relates to the technical field of sampling equipment, and more specifically, relates to a lifting mechanism of a sampling machine. Background technique [0002] When coal, iron concentrate powder, coke, wood chips and other bulk commodity materials enter the factory, it is necessary to use a sampling machine to sample them, so as to obtain samples whose test results can represent the entire batch of sampled materials. [0003] At present, the sampling machine is generally divided into three types according to the difference of the lifting mechanism. The lifting mechanism of the first type of sampling machine is a hydraulic push rod transmission method. Due to the complex structure and the large impact of pressure fluctuation on the working effect of this type of lifting mechanism, professional hydraulic maintenance personnel are required; this type of lifting The mechanism does not have a self-locking device. When the hydraulic push rod ...

AI Technical Summary

Problems solved by technology

The lifting mechanism of the first type of sampling machine is a hydraulic push rod transmission method. Due to the complex structure and the large impact of pressure fluctuation on the working effect of this type of lifting mechanism, professional hydraulic maintenance personnel are required; this type of lifting The mechanism does not have a self-locking device. When the hydraulic push rod fails, it is easy to cause the hydraulic push rod to move accidentally under the gravity of the passive sampler of the sampling machine, posing a safety hazard; when the hydraulic push rod has a long stroke, the guide device (The guide device is a component that guides the hydraulic push rod when it moves, so that the hydraulic push rod moves in the set direction) The accuracy requirements are too high, which increases the difficulty of processing parts

The lifting mechanism of the second type of sampling machine is a chain lifting transmission mode. When the lifting stroke is long in this way, the height arrangement direction of the chain needs a large space; Often spilled on the sprocket, it is easy to cause the phenomenon of chain tooth skipping and tooth loss; this kind of lifting mechanism is also not equipped with a self-locking device. When the deceleration drive fails, there is a potential safety hazard under the gravity of the passive sampler of the sampling machine

The third type of lifting mechanism is the wire rope lifting transmission mode. This transmission mode has poor reliability, and the wire rope is prone to breakage and winding under the stress of the wire rope itself. The lifting passive parts also cannot realize self-locking in an emergency

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