CN2306832Y - Super-low temp. pulverizator - Google Patents

Abstract

The utility model relates to a super-low temp. pulverizator belonging to mechanical equipment for cryopulverization to particular material. The complete appliance comprises a liquid nitrogen distribution box and an electric control cabinet arranged on the outside of a host, a precooling bin, a spiral feeder, a microgrinder, a fan, a cyclone separator, etc. in the host; main devices such as the precooling bin, the spiral feeder, the microgrinder, the fan, the cyclone separator, etc. are connected by pipelines and arranged in a heat preservation box to form a material transmission and a cold air circulation systems; expansion joints are arranged on the pipelines and clamped and assembled by quick connectors. The utility model has the advantages that the yearly process capability is 1-3 thousand tons, the disassembly, the processing variety replacement and the maintenance are convenient, the machining granularity size is 3-5 um, and the cost is about 80% lower than the cost of imported equipment; the utility model is suitable for processing industry such as plastic, rubber, food, etc.

Description

Super-low temperature pulverizator

Super-low temperature pulverizator belongs to the mechanical equipment configuration that deep cooling is pulverized the special requirement material.

Along with the fast development of rubber processing industry plastic processing industry garment processing industry, to rubber, nylon, plastics, powder-product demands such as PUR grow with each passing day, but these polymer substances are difficult to pulverizing at normal temperatures, need with special plant equipment processing.China is successively from Japan, and Germany introduces nearly ten equipment, but working ability does not satisfy domestic market demand far away, still wants a large amount of hot-melt adhesive powders of import and powdery paints every year.Import equipment costs an arm and a leg, final assembly mode inconvenience maintenance and cleaning.Do not find the patent identical by retrieval with the present invention.

The objective of the invention is: a kind of working ability appropriateness is provided, is convenient to dismantle the alternative import equipment of novel super-low temperature pulverizator of cleaning and maintenance.

Technical scheme of the present invention is: adopt liquid nitrogen to make refrigeration working medium material is cooled to below the brittle temperature, utilize theories of mechanics such as high speed impact, grinding, collision, shearing to make.The material of special requirement is pulverized.Complete machine comprises main frame and corollary equipment liquid nitrogen distributor box, electrical control cabinet.In the precooling feed bin in the main frame liquid level sensor is housed, level sensor, back side joint liquid nitrogen pipe, blast pipe, lower end mitered screw feeder, bottom dress ball valve.Screw feeder outlet and atomizer inlet, its outlet and fans entrance, between its outlet and the cyclone inlet successively pipeline be connected, its lower end is in turn connected into product feed bin and butterfly valve.Pipeline connects into cooling air circulation system between cyclone separator upper end and atomizer and precooling feed bin upper end and precooling feed bin bottom and the atomizer.The atomizer inlet tube connects liquid nitrogen pipe and temperature sensor is housed, and the engine housing inwall is equipped with jaw, and the vaned jump bit of mounting strap on the axle, front discharge end take on material orifice plate and grading adjuster.Connecting line is adorned quick connector clip and expansion joint.Precooling feed bin, screw feeder, atomizer, blower fan, cyclone separator, finished product bin are installed in the incubator on the framework.Liquid nitrogen distributor box during work, main frame, machinery between the electrical control cabinet is electrically connected errorless back finished product according to the kind that processes raw material and requires to set each control valve enable possition, grading adjuster position and main frame temperature.The precooling feed bin adds 80% material of liquid nitrogen and volume, and according to complete machine start-up routine start operation, screw feeder begins material and liquid nitrogen are added atomizer simultaneously in the time of within the main frame temperature is reduced to desired scope.Inlet amount is grasped by buncher control feeder spiral revolution.Will constantly replenish liquid nitrogen and raw material in the operation, the material after the pulverizing is transported to cyclone separator by blower fan by pipeline, and the finished product material is transported to charging basket by butterfly valve, when treating that it is filled with cloth seal transport intensification 7-8 hour pourable.

Dependable performance annual working ability 1～3 kiloton of the present invention; The complete machine connected mode is convenient to dismounting cleaning replacing processing variety and maintenance; The converted products granularity can reach 3～5um; Than import equipment price low about 80%.Be widely used in plastics, rubber, processing industries such as food.

Fig. 1: main frame general structure cut-away section schematic diagram.

Fig. 2: main frame general structure A-A cutaway view.

Embodiment carries out in conjunction with Fig. 1, single devices in incubator on the main machine frame and the case, and pipeline, the connector material is 1Cr18Ni9Ti Ovshinsky stainless steel without exception.The inferior arc welding of precooling feed bin 7 usefulness is made, and pushes up on upper end welding charge door 8 and the framework to be connected.The liquid level sensor of installing in the storehouse 5 is selected VyZ-525B type axis nested for use, and level sensor 6 is selected VyZ-50 type condenser type for use.Dress ball valve at the bottom of the storehouse, feed bin lower end and the welding of screw feeder 13 shells, rear side lower end soldering fluid nitrogen inlet pipe (Fig. 2) 21, tracheae, ball valve and exhaust outlet (Fig. 2) 22 runs in the rear side upper end.Flight is equidistantly welded in the bottom segmentation of screw feeder axle, the poly-tetrafluoro sliding bearing 12 of top dress, and the axle upper end is by self-control universal joint shaft joint 10 and 0.75kw, and buncher 11 output shafts that the 2p revolution is 5.8-58 rev/min connect.Modified fine finishining again behind the atomizer 18 housing roughing welding formings.Grinding jaw (Fig. 2) 23 in the machine is divided into two and wears screw fixed on housing with wedge.40 blades of jump bit (Fig. 2) the sharp inclination built-up welding of 24 usefulness carbide electrode department titaniums.Heat up 150 ℃ of postweld heat preservations 3 hours of welding rod weldment before the weldering, the integral spray tungsten carbide carries out quiet, dynamic balancing through special equipment and assembles after the assay was approved, then fixing discharging orifice plate (Fig. 2) 25 last grading adjusters (Fig. 2) 26 that connect.Atomizer material inlet pipe and screw feeder welding, the lower end is installed expansion joint and is connected with shell flange, and the interior soldering fluid nitrogen inlet pipe (Fig. 2) 20 of pipe also is equipped with direct insertion thermocouple temperature sensor (Fig. 2) 19.This machine totally-enclosed bearing box of oil immersed type, duplex bearing selects D level 213 radial bearings.4425 rev/mins of motor 18.5kw2p revolutions, 3540 rev/mins.Blower fan 17 pressure 3000 handkerchief air quantity are not less than 8 cubic metres/minute, and main shaft upper bearing (metal) box is identical with atomizer, and duplex bearing is a 212D level radial bearing, motor 7.5kw4p.Blower fan and atomizer are fixed by bolts on the framework.Cyclone separator 4 manufacturing process are identical with the precooling feed bin, and following end flanges connects into product feed bin inlet, and the butterfly valve 1 that joins with its outlet is contained in the framework below the incubator.43 rev/mins of motor 0.4kw4p revolutions.Finished product material conveying tube 16 cold air recovery tubes 9 are φ 108, and pipeline is installed and adopted quick connector clip 14 and dress expansion joint 15 on pipeline.Incubator 3 usefulness angle steel welding back surfaces externally and internally is pasted the mirror face stainless steel plate, the middle polyurethane foam plastic of filling.With bolt and frame fixation, the thermal insulating door thermally insulated door of front dress silastic sealing strip.Framework 2 usefulness channel-section steel angle steel are connected and fixed by bolt to be made.Realize liquid nitrogen flow control with main frame corollary equipment liquid nitrogen distributor box.Two magnetic valves are selected U.S. REO-HAT normally closed type low temperature two way solenoid valve for use.Two liquid nitrogen efferent ducts join with precooling feed bin and atomizer liquid nitrogen inlet tube respectively.Electrical control cabinet is realized liquid nitrogen liquid level, flow, temperature, the Detection ﹠ Controling such as reaching the fault alarm protection of feeding in raw material by electric principle distribution.

Claims (1)

1 super-low temperature pulverizator comprises main frame and corollary equipment liquid nitrogen distributor box and electrical control cabinet, it is characterized in that: liquid level sensor is housed, level sensor in the precooling feed bin in the main frame, the back is surveyed and is connect liquid nitrogen pipe, blast pipe, lower end mitered screw feeder, bottom dress ball valve; Screw feeder outlet and atomizer inlet, its outlet and fans entrance, between its outlet and the cyclone inlet successively pipeline be connected, its lower end is in turn connected into product feed bin and butterfly valve; Pipeline connects into cooling air circulation system between cyclone separator upper end and atomizer and precooling feed bin upper end and precooling feed bin bottom and the atomizer; The atomizer inlet tube connects liquid nitrogen pipe and temperature sensor is housed, and wall jaw in the engine housing, the vaned jump bit of mounting strap on the axle, front discharge end take on material orifice plate and grading adjuster, and connecting line is adorned quick connector clip and expansion joint; Precooling feed bin, screw feeder, atomizer, blower fan, cyclone separator and finished product bin are installed in the incubator on the framework.

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