CN105673568A - Exhaust heat drying rotary kiln with induced draft fan convenient to disassemble - Google Patents

Abstract

The invention discloses an exhaust heat drying rotary kiln with an induced draft fan convenient to disassemble. The rotary kiln is obliquely arranged and internally provided with a combustor. The high end of the rotary kiln is bidirectionally connected with one end of a drying machine through a discharging pipe and an air pipe. A conveyor belt is arranged in the drying machine and connected with the discharging pipe. A closed-air aspirator is arranged at the other end of the drying machining. A protruding refractory slab is arranged in the rotary kiln. The drying machine is connected with the induced draft fan through a cyclone dust collector. The closed-air aspirator is connected with the portion below the cyclone dust collector. A dust collection cylinder is arranged below the closed-air aspirator. Dust can be cleaned in time through an impeller of the induced draft fan under the centrifugal force action. By the adoption of the exhaust heat drying rotary kiln with the induced draft fan convenient to disassemble, thermal efficiency is high; besides, the disassembly technology of the induced draft fan is improved greatly, so that pressure applied to the shaft shoulder end face of a screw by components similar to a nut component can be eliminated easily when the induced draft fan is disassembled, and the problem that the induced draft fan is locked continuously and automatically and cannot be disassembled easily under the load action due to threaded assembly is solved effectively; and the exhaust heat drying rotary kiln is especially suitable for convenient and fast disassembly of a large-scale fan which is locked in a threaded manner, and the effect is especially remarkable.

Description

Air-introduced machine is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled

Technical field

The present invention relates to a kind of rotary kiln, referring specifically to air-introduced machine will not laying dust and be easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled.

Background technology

Rotary kiln due to adaptable, operating cost is low, highly reliable, be one of mineral dispensing, balling-up, reaction and dry main preferred unit, be particularly well-suited to the processing calcination of navajoite. Rotary kiln need to consume fuel to keep the high temperature being suitable in kiln in work process, thus containing a large amount of heat energy and dust in the tail gas of rotary kiln discharge, it is necessary to carry out tail gas purifying and tail heat recovery operation, it is achieved energy-saving and emission-reduction.

Rotary kiln is generally cylindrical cross section, thus material is only small with the heat transfer area of kiln body, causes that the thermal efficiency is not high. Therefore, if the rotary kiln that design thermal efficiency is high, tail recuperation of heat is high with good dedusting effect, material turnover smoothness and serialization degree, all significant for realizing energy-saving and emission-reduction and raising work efficiency.

Blower fan is the key equipment that rotary kiln carries out dedusting and recuperation of heat; blower fan is generally centrifugal blower; blower fan continuous, stable, reliably working is very crucial to the dedusting of rotary kiln; the occasion used due to rotary kiln all contains certain dust mostly; during blower fan work; due to centrifugation when air-flow is by the draught fan impeller of high speed rotating, dust granule can depart from air-flow phase and deposit and be attached on draught fan impeller.

Draught fan impeller rotating speed is general all higher, as long as air-flow there being trace dust exist, more dust all can be accumulated after working long hours, thus changing the balance that draught fan impeller rotates, if dust is not had self purification also without timely cleaning by draught fan impeller, will cumulative and progressively change static state and the dynamic equilibrium of draught fan impeller, thus producing vibration. Having the dust that hardens of part to be vibrated to come off, will balance away from the dynamic rotary of air-introduced machine immediately, then produce judder once run into, this may cause serious personnel and equipment security incident.

On the other hand, it is draught fan impeller that the structure of common blower fan is typically all fan shaft one end, and the other end is motor power input, is often shaft coupling. Owing to blower fan is typically all long-time operation continuously, so bearing is fragile, change bearing and generally need to first dismantle the shaft coupling of draught fan impeller and the other end, but the assembling of existing fan shaft and draught fan impeller, shaft coupling belongs to typical axle, hole interference fit, and carry out carrying transmission by key. The usual requirement on machining accuracy of interference fit is higher, and associative key connection realizes torque bearing function, and assembling generally all needs to load very big extruding force, without professional equipment and instrument, dismounts all very inconvenient.

Threaded have that processing is simple, it is convenient to assemble, also there is unidirectional carrying torque functions, therefore, if threaded at fan shaft with the connection in hole can adopt and realize transmission simultaneously, so as to assembly or disassembly is all comparatively convenient, then possess higher practical value and market application foreground.Coordinate in motion thread assembling at actual axle with hole, in order to be able to realize big bearing function demand, thread spindle is all relatively big with the scantling of the similar nut member matched, and it is often all also very easily convenient to screw in when assembling, and in use can realize the constantly locking automatically of bearing capacity, thus it is very reliable, but when dismounting, assembling is very tight often, dismantles very difficult, if simple easy removal can be realized under these conditions, it appears particularly important.

Therefore, if a kind of rotary kiln can be designed so that it is blower fan can not only clear up dust automatically, and dismantle and maintenance is all very convenient, for promoting the technological progress of rotary kiln and stopping security incident all there is the meaning of particular importance.

Summary of the invention

The technical problem to be solved in the present invention overcomes the deficiencies in the prior art exactly, it is provided that a kind of blower fan can not only clear up dust automatically, and dismantles and overhaul the dry rotary kiln of tail baking the affected part after applying some drugs that air-introduced machine all very easily is easy to disassemble.

For overcoming the deficiencies in the prior art, the present invention takes techniques below scheme:

A kind of air-introduced machine is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, including rotary kiln, it is characterized in that: rotary kiln is in tilted layout, built-in combustion device, the high-end one end with dehydrator of rotary kiln is bi-directionally connected by material blanking tube and airduct, being provided with conveyer belt in dehydrator and connect material blanking tube, the other end of dehydrator is provided with wind stopping device; The refractory slab of projection it is provided with in rotary kiln; Described dehydrator connects air-introduced machine through cyclone dust extractor, and cyclone dust extractor is connected below wind stopping device, and wind stopping device is connected with the bucket that gathers dust; Described air-introduced machine includes draught fan impeller, bearing, fan shaft and shaft coupling, shaft coupling and fan shaft and draught fan impeller and fan shaft all adopts Screw assembly, and thread rotary orientation is the direction with work with carrying auto lock; The similar nut of draught fan impeller is by threadeding with fan shaft and impeller plain washer, copper-lead being reversed composite pad and compressed, and draught fan impeller and fan shaft one end form screw thread and be rigidly connected; Clip part is inserted in the fan shaft other end, then shaft coupling plain washer is inserted in fan shaft, is then threaded into the shaft coupling of similar nut more rationally all locking, makes the clip part shaft coupling with similar nut also constitute with the fan shaft other end and is rigidly connected; It is the copper packing that punch process becomes that described copper-lead reverses composite pad, is with fin outside it, then at copper packing both sides compound fusible lead alloy packing ring; Described clip part is made up of clip, clip ear, clip pad and bolt, clip cross section is wedge shape, formed opening structure by two semicircular ring card hoop bodies, clip pad opens elliptical aperture to strengthen axial elasticity, clip pad two ends are planar structure, being easy to coordinate with shaft shoulder plane, clip uses bolt through the hole on clip ear, is assemblied on clip pad and is integrally forming.

Described draught fan impeller includes impeller backboard, impeller panel, primary blades and auxiliary blade, and primary blades is flat panel contours and is arranged to impeller Axial and radial, centrosymmetric emitting shape; Primary blades connects impeller panel and is welded into impeller bodies with impeller backboard; Impeller panel is provided with air inlet, and impeller backboard connects into firm one by welding with blower fan axle bed with primary blades inner edge, and blower fan axle bed is connected by axis hole and fan shaft; Blower fan auxiliary blade and impeller panel, backboard, primary blades all constitute three-legged structure.

Described burner connects air shut-off valve and fuel control valve.

It is provided with fan in described dehydrator, is conducive to the dry of material.

Described wind stopping device connects pan-pelletizer, and pan-pelletizer connects blender.

The low side of described rotary kiln connects insulation reaction bucket, and insulation reaction bucket connects chilling liquid pool, is provided with out material strip in chilling liquid pool, goes out material strip roller of being commissioned and supports.

The refractory slab of described projection is trapezoidal or rectangle or triangle.

Rotary kiln is the core component of system, and general structure is all fixing refractory insulating layer in steel cylinder, in the design by protruding refractory slab can continuously, interruption, length, the multiple combination form such as uniform constitute firmly refractory material entirety in steel cylinder.

Arranging burner in rotary kiln, burner connects air shut-off valve and fuel control valve, and fuel can be the coal dust that coal gas may also be that compression air conveying is come in, ejection burning in burner.

Mineral powder is mix homogeneously in blender, output carries out pelletize at pan-pelletizer, dehydrator is entered by wind stopping device, in dehydrator, material is carried from left to right by conveyer belt, carry out counter-current drying and the pre-heat treatment with tail gas stream from right to left, fan can penetrate material by strengthening flow, strengthens drying and preheating effect, the spherical material of preheated process can be fallen into rotary kiln by material blanking tube, and trachea realizes air-flow conducting; Combustion gas is move from left to right in rotary kiln, and move from right to left composition countercurrent flow with material, it is achieved high-temperature process.

Rotary kiln has suitable inclination angle, control certain rotating speed rotate, material can realize controlled by high-end to low end motion, simultaneously completing operation, protruding refractory slab can grasp material, promotes material turning, it is greatly increased flame heating surface (area) (HS simultaneously, is conducive to being rapidly achieved reaction temperature, improve efficiency.

Export to low side after spherical material pyroreaction, enter insulation reaction bucket, proceed residual heat high-temperature subsequent reactions, chilling liquid pool is provided with out material strip, chilling pond can be reactant liquor, ball material is carried out cooling rapidly and reaction, enter chilling liquid pool by controlling material strip motion from the output of insulation reaction bottom of the barrel, carrying roller can be effectively improved out the bearing capacity of material strip, and just under entering, solidliquid mixture output in pond can be walked treatment process.

Tail gas is connected cyclone separator by dehydrator by left end output and completes dedusting and output, and central canal output dedusting gas empties after connecting air-introduced machine.

When the draught fan impeller of the present invention uses, owing to the major-minor sharf radial center of blower fan is symmetrical, blade is when high speed rotating, blade surface has powerful eccentric surfaces self purification under powerful centrifugal action, dust cannot adhere to and can realize Quick spin separation, without influence on dynamic, the static equilibrium of impeller, it is suitable for big flow, laying dust air-flow high-power, anti-conveying. The Axial and radial centrosymmetric structure that impeller panel, backboard, primary blades, auxiliary blade are all triangle, make its blower fan backboard connected and the anti-relative torsion of panel, extruding rigidity extremely strong, blower fan primary blades can be stopped completely and connect the fatigue fracture that backboard root causes because of carrying Moment, also higher intensity can be obtained by relatively thin board making, ensure to stablize, reliably use, the Impeller Design of this spline structure is particularly suitable for thin plate and makes, it is easy to save material, is conducive to light and handyization of equipment.

When air-introduced machine need to be dismantled and overhaul, the copper-lead utilizing innovative design reverses composite pad, clip part, pass through operation readiness, simply eliminating the similar nut member pressure to screw shaft shoulder end face, at this moment nut and screw part are in unloading vacant state, take apart and become equally simple and convenient with Screw assembly, for solving Screw assembly continuous auto lock under load effect, not easily detachable technical barrier, in large fan shaft components screw-threaded coupling field, such function is particularly important.

When draught fan impeller needs dismounting but is very difficult, the copper packing that copper-lead is reversed in the middle of Composition spacer by oxy arc is adopted to carry out oxy arc heat treated, owing to the conductivity of heat of copper is fabulous, and the fusing point of metal is relatively low, after heating, metal is heated melting, the compression tensile force of draught fan impeller and shaft shoulder step is completely eliminated, and makes draught fan impeller be in vacant state completely, is especially susceptible to dismounting.

When the joint member of similar nut needs dismounting but is very difficult, with spanner, bolt is pulled down, two semicircular ring card hoop bodies of cause are quick is wedge shape to opening structure and clip body section, can connect to close up from two clip ears with the flat instrument in one end and easily pry open, clip easy removal is got off, clip pad returns to relaxed state, the tensile force after the locking of joint member and shaft shoulder end face is made to be completely eliminated, the joint member making similar nut is in vacant state completely, is especially susceptible to dismounting.

Compared with prior art, beneficial effects of the present invention also resides in the dismounting technology of the air-introduced machine that significantly taken on a new look, can effectively solve air-introduced machine Screw assembly continuous not easily detachable problem of auto lock under load effect, it is particularly suitable for the convenient dismounting after large fan screw-threaded coupling, effect is especially pronounced, be mainly reflected in following some:

1, not changing the feature of Screw assembly, only need to add Pot metal composite pad, clip pad and clip, low being also especially susceptible to of cost realizes; 2, Pot metal composite pad, clip pad can play good Stress decomposition effect, effectively strengthen the bearing capacity of structure, and elliptical aperture opened by clip pad can effectively strengthen clip pad axial elasticity; 3, the Assembly And Disassembly of the design of Pot metal composite pad hot melt and clip is used very cleverly, realize the tensioning of axial accessory and lax function, the effectively quick tensile force eliminating the locking of similar nut, it is achieved the assembly rapid and convenient dismounting of similar nut member Screw assembly tight especially; 4, clip pad and the wedged dress distribution structure of clip are easy to repeatedly quick assembly and disassembly use.

Accompanying drawing explanation

Fig. 1 is the planar structure schematic diagram of the present invention

Fig. 2 is the perspective view of axes of blower system.

Fig. 3 is the planar structure schematic diagram of axes of blower system.

Fig. 4 is the perspective view of draught fan impeller.

Fig. 5 is the cross-sectional view of draught fan impeller.

Fig. 6 is the structural representation that copper-lead reverses composite pad.

Fig. 7 is the assembling structural representation of clip part.

Fig. 8 is the fractionation structural representation of clip part.

Fig. 9 is the structural representation of clip pad.

Figure 10 is the cross section structure schematic diagram of rotary kiln.

In figure, each label represents:

A, air-introduced machine; 1, rotary kiln; 2, insulation reaction bucket; 3, material strip is gone out; 4, chilling liquid pool; 5, protruding refractory slab (trapezoidal); 6, burner; 7, flame; 8, cyclone dust extractor; 9, airduct; 11, wind stopping device; 12, pan-pelletizer; 13, blender; 14, conveyer belt; 15, fan; 16, dehydrator, 17, trachea; 18, material blanking tube; 19, air shut-off valve; 20, fuel control valve; 21, spherical material; 22, carrying roller; 23, gather dust bucket; 31, primary blades; 32, auxiliary blade; 33, impeller air inlet; 34, blower fan axle bed; 36, axis hole; 37, impeller backboard; 38, impeller panel; 41, draught fan impeller; 42, impeller plain washer; 43, copper-lead reverses composite pad; 44, bearing; 45, fan shaft; 46, clip part; 47, shaft coupling plain washer;48, shaft coupling; 51, copper packing and fin; 52, fusible lead alloy packing ring; 61, clip; 62, clip ear; 63, clip pad; 64, slotted eye; 65, bolt.

Detailed description of the invention

In conjunction with accompanying drawing, the present invention is further elaborated with.

As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, air-introduced machine shown in Fig. 8, Fig. 9 and Figure 10 are easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, including rotary kiln 1, rotary kiln 1 is in tilted layout, built-in combustion device 6, the high-end one end with dehydrator 16 of rotary kiln 1 is bi-directionally connected by material blanking tube 18 and airduct 17, being provided with conveyer belt 14 in dehydrator 16 and connect material blanking tube 18, the other end of dehydrator 16 is provided with wind stopping device 11; The refractory slab 5 of projection it is provided with in rotary kiln 1; Described dehydrator 16 connects air-introduced machine A through cyclone dust extractor 8, and cyclone dust extractor 8 is connected below wind stopping device 11, and wind stopping device 11 is connected with the bucket 23 that gathers dust; Described air-introduced machine A includes draught fan impeller 41, bearing 44, fan shaft 45 and shaft coupling 48, and shaft coupling 48 all adopts Screw assembly with fan shaft 45 and draught fan impeller 41 with fan shaft 45, and thread rotary orientation is the direction with work with carrying auto lock; The similar nut of draught fan impeller 41 is by threadeding with fan shaft 45 and impeller plain washer 42, copper-lead being reversed composite pad 43 and compressed, and draught fan impeller 41 and fan shaft 45 one end form screw thread and be rigidly connected; Clip part 46 is inserted in fan shaft 45 other end, again shaft coupling plain washer 47 is inserted in fan shaft 45, it is then threaded into the shaft coupling 48 of similar nut more rationally all locking, makes the clip part 46 shaft coupling 48 with similar nut also constitute with fan shaft 45 other end and be rigidly connected; Described copper-lead reverses the copper packing that composite pad 43 becomes for punch process, is with fin 51 outside it, then at copper packing both sides compound fusible lead alloy packing ring 52; Described clip part 46 is made up of clip 61, clip ear 62, clip pad 63 and bolt 65, clip 61 cross section is wedge shape, formed opening structure by two semicircular ring card hoop bodies, clip pad 63 opens elliptical aperture 64 to strengthen axial elasticity, clip pad 63 two ends are planar structure, being easy to coordinate with shaft shoulder plane, clip uses bolt 65 through the hole on clip ear 62, is assemblied on clip pad 63 and is integrally forming.

Described draught fan impeller 41 includes impeller backboard 37, impeller panel 38, primary blades 31 and auxiliary blade 32, and primary blades 31 is for flat panel contours and is arranged to impeller Axial and radial, centrosymmetric emitting shape; Primary blades 31 connects impeller panel 38 and is welded into impeller bodies with impeller backboard 37; Impeller panel 38 is provided with air inlet 33, and impeller backboard 37 connects into firm one by welding with fan shaft 45 with primary blades 31 inner edge, and blower fan axle bed 34 is connected by axis hole 36 and fan shaft 45; Blower fan auxiliary blade 32 and impeller panel 38, backboard 37, primary blades 31 all constitute three-legged structure.

Described burner 6 connects air shut-off valve 19 and fuel control valve 20.

It is provided with fan 15 in described dehydrator 16, is conducive to the dry of material.

Described wind stopping device 11 connects pan-pelletizer 12, and pan-pelletizer 12 connects blender 13.

The low side of described rotary kiln 1 connects insulation reaction bucket 2, and insulation reaction bucket 2 connects chilling liquid pool 4, is provided with out material strip 3 in chilling liquid pool 4, goes out material strip 3 and is supported 22 by carrying roller.

The refractory slab of described projection is trapezoidal or rectangle or triangle.

Rotary kiln 1 is the core component of system, and general structure is all fixing refractory insulating layer in steel cylinder, in the design by protruding refractory slab 5 can continuously, interruption, length, the multiple combination form such as uniform constitute firmly refractory material entirety in steel cylinder.

Arranging burner 6 in rotary kiln 1, burner 6 connects air shut-off valve 19 and fuel control valve 20, and fuel can be the coal dust that coal gas may also be that compression air conveying is come in, ejection burning in burner 6.

Mineral powder is mix homogeneously in blender 13, output carries out pelletize at pan-pelletizer 12, dehydrator 16 is entered by wind stopping device 11, in dehydrator, material is carried from left to right by conveyer belt 14, carry out counter-current drying and the pre-heat treatment with tail gas stream from right to left, fan 15 can penetrate material by strengthening flow, strengthens drying and preheating effect, the spherical material 21 of preheated process can be fallen into rotary kiln 1 by material blanking tube 18, and trachea realizes 17 air-flow conductings; Combustion gas is move from left to right in rotary kiln 1, and move from right to left composition countercurrent flow with material, it is achieved high-temperature process.

Rotary kiln 1 has suitable inclination angle, control certain rotating speed to rotate, material can realize controlled by high-end to low end motion, simultaneously complete operation, protruding refractory slab 5 can grasp material, promotes material turning, is greatly increased flame heating surface (area) (HS simultaneously, be conducive to being rapidly achieved reaction temperature, improve efficiency.

Export to low side after spherical material 21 pyroreaction, enter insulation reaction bucket 2, proceed residual heat high-temperature subsequent reactions, chilling liquid pool 4 is provided with out material strip 3, chilling pond 4 can be reactant liquor, ball material is carried out cooling rapidly and reaction, enter chilling liquid pool 4 by controlling material strip 3 output bottom insulation reaction bucket 2 of moving, carrying roller 22 can be effectively improved out the bearing capacity of material strip 3, and just under entering, solidliquid mixture output in pond can be walked treatment process.

Tail gas is connected cyclone separator 8 by dehydrator 16 by left end output and completes dedusting and output, emptying after central canal output dedusting gas connection air-introduced machine A.

When the draught fan impeller of the present invention uses, owing to the major-minor sharf radial center of blower fan is symmetrical, blade is when high speed rotating, blade surface has powerful eccentric surfaces self purification under powerful centrifugal action, dust cannot adhere to and can realize Quick spin separation, without influence on dynamic, the static equilibrium of impeller, it is suitable for big flow, laying dust air-flow high-power, anti-conveying. The Axial and radial centrosymmetric structure that impeller panel 38, backboard 37, primary blades 31, auxiliary blade 32 are all triangle, make its blower fan backboard connected and the anti-relative torsion of panel, extruding rigidity extremely strong, blower fan primary blades can be stopped completely and connect the fatigue fracture that backboard root causes because of carrying Moment, also higher intensity can be obtained by relatively thin board making, ensure to stablize, reliably use, the Impeller Design of this spline structure is particularly suitable for thin plate and makes, it is easy to save material, is conducive to light and handyization of equipment.

When air-introduced machine A need to dismantle and overhaul, the copper-lead utilizing innovative design reverses composite pad 43, clip part 46, pass through operation readiness, can simply eliminate the similar nut member pressure to screw shaft shoulder end face, at this moment nut and screw part are in unloading vacant state, take apart and become equally simple and convenient with Screw assembly, for solving Screw assembly continuous auto lock under load effect, not easily detachable technical barrier, in large fan shaft components screw-threaded coupling field, such function is particularly important.

When draught fan impeller 41 needs dismounting but is very difficult, the copper packing that copper-lead is reversed in the middle of Composition spacer by oxy arc is adopted to carry out oxy arc heat treated, owing to the conductivity of heat of copper is fabulous, and the fusing point of metal is relatively low, after heating, metal is heated melting, the compression tensile force of draught fan impeller 41 and shaft shoulder step is completely eliminated, and makes draught fan impeller be in vacant state completely, is especially susceptible to dismounting.

When the joint member of similar nut needs dismounting but is very difficult, with spanner, bolt is pulled down, two semicircular ring card hoop bodies of cause are quick is wedge shape to opening structure and clip body section, can connect to close up from two clip ears with the flat instrument in one end and easily pry open, clip easy removal is got off, clip pad returns to relaxed state, the tensile force after the locking of joint member and shaft shoulder end face is made to be completely eliminated, the joint member making similar nut is in vacant state completely, is especially susceptible to dismounting.

Above-mentioned simply presently preferred embodiments of the present invention, not does any pro forma restriction to the present invention. Any those of ordinary skill in the art, when without departing from technical solution of the present invention scope, may utilize the technology contents of the disclosure above and technical solution of the present invention are made many possible variations and modification, or be revised as the Equivalent embodiments of equivalent variations. Therefore, every content without departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.

Claims (6)

1. an air-introduced machine is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, including rotary kiln, it is characterized in that: rotary kiln is in tilted layout, built-in combustion device, the high-end one end with dehydrator of rotary kiln is bi-directionally connected by material blanking tube and airduct, being provided with conveyer belt in dehydrator and connect material blanking tube, the other end of dehydrator is provided with wind stopping device; The refractory slab of projection it is provided with in rotary kiln; Described dehydrator connects air-introduced machine through cyclone dust extractor, and cyclone dust extractor is connected below wind stopping device, and wind stopping device is connected with the bucket that gathers dust; The low side of described rotary kiln connects insulation reaction bucket, and insulation reaction bucket connects chilling liquid pool, is provided with out material strip in chilling liquid pool, goes out material strip roller of being commissioned and supports; Described air-introduced machine includes draught fan impeller, bearing, fan shaft and shaft coupling, shaft coupling and fan shaft and draught fan impeller and fan shaft all adopts Screw assembly, and thread rotary orientation is the direction with work with carrying auto lock; The similar nut of draught fan impeller is by threadeding with fan shaft and impeller plain washer, copper-lead being reversed composite pad and compressed, and draught fan impeller and fan shaft one end form screw thread and be rigidly connected; Clip part is inserted in the fan shaft other end, then shaft coupling plain washer is inserted in fan shaft, is then threaded into the shaft coupling of similar nut more rationally all locking, makes the clip part shaft coupling with similar nut also constitute with the fan shaft other end and is rigidly connected; It is the copper packing that punch process becomes that described copper-lead reverses composite pad, is with fin outside it, then at copper packing both sides compound fusible lead alloy packing ring; Described clip part is made up of clip, clip ear, clip pad and bolt, clip cross section is wedge shape, formed opening structure by two semicircular ring card hoop bodies, clip pad opens elliptical aperture to strengthen axial elasticity, clip pad two ends are planar structure, being easy to coordinate with shaft shoulder plane, clip uses bolt through the hole on clip ear, is assemblied on clip pad and is integrally forming.

2. air-introduced machine according to claim 1 is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, it is characterized in that: described draught fan impeller includes impeller backboard, impeller panel, primary blades and auxiliary blade, primary blades is flat panel contours and is arranged to impeller Axial and radial, centrosymmetric emitting shape; Primary blades connects impeller panel and is welded into impeller bodies with impeller backboard; Impeller panel is provided with air inlet, and impeller backboard connects into firm one by welding with blower fan axle bed with primary blades inner edge, and blower fan axle bed is connected by axis hole and fan shaft;Blower fan auxiliary blade and impeller panel, backboard, primary blades all constitute three-legged structure.

3. air-introduced machine according to claim 1 and 2 is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, it is characterised in that: described burner connects air shut-off valve and fuel control valve.

4. air-introduced machine according to claim 1 and 2 is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, it is characterised in that: it is provided with fan in described dehydrator, is conducive to the dry of material.

5. air-introduced machine according to claim 1 and 2 is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, it is characterised in that: described wind stopping device connects pan-pelletizer, and pan-pelletizer connects blender.

6. air-introduced machine according to claim 1 and 2 is easy to the dry rotary kiln of tail baking the affected part after applying some drugs disassembled, it is characterised in that: the refractory slab of described projection is trapezoidal or rectangle or triangle.