CN207169873U - The on-line automatic control sieve of coal pulverizer failure ball takes device - Google Patents

Abstract

A kind of on-line automatic control sieve of coal pulverizer failure ball takes device, belongs to electric power factory equipment renovation technique field.The purpose of this utility model automatically controls only sieve and takes the on-line automatic control sieve of coal pulverizer failure ball of function of failure steel ball in cylinder, useless ball to take device when being and realizing coal pulverizer on-line operation.The utility model is provided with conical collector below the horizontal fixed short tube of coal pulverizer, conical collector is suitable for reading to be provided with sieve numbness, the outlet of conical collector lower end is installed with conduit, upper conduit is connected by airduct with envelope coal airduct, upper conduit lower end is provided with downcomer by thread, and ball sheath is provided with out in lower air conduit lower end, and rotating shaft is provided with the short side bottom for going out ball sheath, lock gas transposition and weight linear meter are installed in rotating shaft, lock gas transposition inclined surface ball mouth.The utility model can automatically control only sieve and take failure steel ball in cylinder, the function of useless ball during on-line operation, solve sieve plate sieve and unload that ball hand picking operating environment is severe, labor intensity is big, stopping time consuming, long and online steel ball screening plant has the problems such as the defects of inherency.

Description

The on-line automatic control sieve of coal pulverizer failure ball takes device

Technical field

The utility model belongs to electric power factory equipment renovation technique field.

Background technology

The general abbreviation low speed coal mill of low-speed coal mill or ball mill, low-speed coal mill rotating speed are 16 ~ 25 revs/min, and it is Drive the steel ball in cylinder to move using the liner wave plate cylinder of low speed rotation, by shock of the steel ball to raw coal, extrude and grind Mill is acted on to realize that coal dust is made in the broken and grinding of coal cinder.Standard 30 ~ 60mm of steel ball size, when low speed coal mill runs one section Between after, the worn steel ball in coal pulverizer is tapered into, and after steel ball size is less than 20-25mm, path steel ball is hit to coal particle Hit and failed substantially with abrasive action, a large amount of balls that fail take the confined spaces in cylinders, as the operation of coal pulverizer rotates and big The entrance of raw coal is measured, the failure ball rotate, thrown is pushed to the accumulation of coal pulverizer exit and stopped under dry wind mobilization Coal dust flows, and influences coal pulverizer ventilation and contributes.Simultaneously because largely the generation of failure ball can cause coal pulverizer overall performance to contribute Significantly decline, power consumption increase and failure ball are ground and damage equipment into shroud sealing clamp.According to country and industry relevant regulations, steel Ball wear is discarded to that should be sieved during setting, it is ensured that steel ball matching is optimal in cylinder, and pulverizer capacity is optimal.

Coal pulverizer steel ball screening mode has two kinds of forms at present, i.e., coordinates sieve plate sieve to unload ball using slow transmission device artificial Select mode and increase a set of online steel ball screening plant, and both steel ball screening modes at least have the following disadvantages：When Coordinate sieve plate sieve to unload ball hand picking mode using slow transmission device, stop time consuming length, operating environment is severe, labor intensity is big Resentment is produced with staff；Second, the fund input of a set of online steel ball screening system equipment of increase is excessive；Third, adopt Need to install additional in the perforate of coal pulverizer outlet end cap position with online steel ball sieve screening device and get rid of ball passage, cause end cap intensity to decline production Raw crackle and cold wind leak into pulverized coal preparation system；Four are utilized in the sieve plate sieve aperture of line steel ball screening plant and to get rid of ball passage easily same Steel ball etc. size is blocked, it is necessary to stop grinding into cleaning in coal-grinding machine barrel, security risk is very big, big into the small ball wear after sieve plate Axle and axle sleeve；Five, which are utilized in the motion locus of steel ball that line steel ball screening plant method is sifted out, is arbitrarily not easy to collect, while coal Fragment particle also can together be sifted out with steel ball.

The content of the invention

The purpose of this utility model automatically controls only sieve and takes failure steel ball in cylinder, useless ball when being and realizing coal pulverizer on-line operation Function coal pulverizer failure ball it is on-line automatic control sieve take device.

The utility model is provided with conical collector, conical collector installation suitable for reading below the horizontal fixed short tube of coal pulverizer There is sieve numbness, the outlet of conical collector lower end is installed with conduit, and upper conduit is connected by airduct with envelope coal airduct, and Airduct is provided with volume damper, and upper conduit lower end is provided with downcomer by thread, is provided with out in downcomer lower end Ball sheath, the outlet for going out ball sheath is inclined-plane ball mouth, is provided with rotating shaft in the short side bottom for going out ball sheath, is installed in rotating shaft There are lock gas transposition and weight linear meter, lock gas transposition inclined surface ball mouth；It is slope to have inside below corresponding inclined-plane ball mouth Useless ball transferring box, useless ball storage bin is placed below in the ball mouth below useless ball transferring box.

The utility model can automatically control only sieve and take failure steel ball in cylinder, the function of useless ball during on-line operation, solve sieve Screen unload ball hand picking operating environment is severe, labor intensity is big, the long and online steel ball screening plant that stops time consuming exist it is intrinsic The problems such as the defects of property.

Brief description of the drawings

Fig. 1 is the structural representation that the utility model is arranged on coal pulverizer；

Fig. 2 is the utility model structure diagram；

Fig. 3 is that the utility model Fig. 2 goes out ball sheath position partial enlarged drawing.

Embodiment

Coal pulverizer structure：The front end sleeve of rotary steering helix tube 3 fixes the tail end of short tube 1 in level, in rotary steering helix tube 3 The steel ball that the interior many diameters of filling differ, is entered during rotary steering helix tube 3 is rotated by steel ball to coal Row grinding, the diameter of general steel ball be effective ball in 30-60mm, and horizontal fixation short tube 1 is then fixed, so typically Simple seal is carried out by sealing clamp 2 in rotary steering helix tube 3 and the horizontal fixed docking site of short tube 1.Because coal is in steel Although coal is clayed into power in the process of lapping of ball, simultaneously coal also to steel ball some abrasion, for a long time wear after, steel ball it is straight Footpath will be lower than 25mm, now general in industry to be failure ball, and this grinding of failure ball not only to coal does not have ideal effect, and And the gap at sealing clamp 2 is likely to enter, cause the abrasion to rotary steering helix tube 3 or horizontal fixed short tube 1.

The utility model one failure ball screening plant 5 of installation, failure ball sieve below the horizontal fixed short tube 1 of coal pulverizer The conical collector 502 of screening device 5 is opened on the horizontal fixed wall of short tube 1 of coal pulverizer, and conical collector 502 is suitable for reading to be provided with sieve numbness 4, sieve numbness 4 footpath hole 25mm or below 25mm, so when fail ball diameter be less than 25mm when, through sieving numbness 4 at will be from hole Middle landing, the outlet of the lower end of conical collector 502 are installed with conduit 510, and it is horizontal fixed that conduit 510 is integrally fixed at coal pulverizer On the outer wall of short tube 1, failure ball after conical collector 502 skids off, into conduit 510, upper conduit 510 by airduct 501 with Envelope coal airduct is connected, and the wind regime that airduct 501 enters can export quoted from mill exhauster, will not increase pulverized coal preparation system and leak out, also may be used With by providing wind regime air feed for oneself, and volume damper is provided with airduct 501, the wind that airduct 501 enters can be on upward conduit 510 End is blown into, and the ball that fails is due to for steel, so, wind can not be blown back, and the fine coal slid is really very light, will be returned by wind Into the fixed short tube 1 of level.The upper lower end of conduit 510 is provided with downcomer 511 by thread 504, in the lower end of downcomer 511 Ball sheath 512 is installed out, the outlet for going out ball sheath 512 is inclined-plane ball mouth 515, because ball mouth is inclined-plane, so, will The side for using ball sheath 512 forms a long side 514 and a short side 513, and long side 514 blocks failure ball, guiding failure ball Slid to the side of short side 513, the ball that will not will be failed because of air-lock device 507 is extruded outside following transferring box, is going out ball sheath 512 bottom of short side 513 is provided with rotating shaft 503, and lock gas transposition 507 and weight linear meter 506 are provided with rotating shaft 503, and lock gas turns 507 inclined surface ball mouths 515 are put, air-lock device 507 is similar to a lid, when the failure ball for going out the building up inside of ball sheath 512 When weight accumulation is less than balance weight, air-lock device 507 is covered on the inclined-plane ball mouth 515 of ball sheath 512 is gone out, and prevents airduct Wind is blown out from lower end, and when the ball weight accumulation that fails is higher than balance weight, the failure club of accumulation pushes air-lock device 507 simultaneously open Slide to transferring box, after the completion of failure ball slides, air-lock device 507 at once can cover inclined-plane ball mouth 515, continue to prevent wind Dropped out with coal.There is the internal useless ball transferring box 508 for slope below corresponding inclined-plane ball mouth 515, give up under ball transferring box 508 Useless ball storage bin 509 is placed below in the ball mouth in face.

It is operation principle, the equipment according to coal pulverizer that the on-line automatic control sieve of MTZ types low-speed coal mill failure ball, which takes method, Structure and practical operation situation, wear out failure steel ball, broken ball are mainly deposited at the fixed short tube of level of the coal pulverizer port of export, such as Fruit lower curtate perforate in the fixed short tube of level can directly drop taking-ups, but pulverized coal particle be present and different size steel ball, fail ball The problems such as falling out simultaneously and leak into cold wind.To realize application cylinder body drain wind and ensureing only to sieve the failure steel taken below 25mm diameters Ball, give up ball, is designed with the utility model and screens failure steel ball method using collector, failure steel ball passes through falling sphere conduit With air-lock device deriving method, pulverized coal particle and failure steel ball separation method, block dredging method and dredge storage method etc..

It is by collector, falling sphere conduit, envelope coal wind that the on-line automatic control sieve of MTZ types low-speed coal mill failure ball, which takes device, Pipe, volume damper, falling sphere conduit middle part thread, air-lock device, transferring box and regular storage bin composition.

Described collector is long arc shape box structure, and entrance takes failure steel ball, collector provided with oblique arc sieve grate for sieve The midsole position being welded on the outside of the fixed short tube of level of the coal pulverizer port of export, and open long arc shape hole in the fixed short tube of level and be used for Centralized collection failure steel ball；The falling sphere conduit that perforate welding internal diameter in collector bottom is 25mm, for the failure steel ball, useless collected Ball exports；To prevent pulverized coal particle from being dropped out with failure steel ball while lead, on falling sphere conduit installation seal coal airduct（The wind regime can draw Exported from mill exhauster, pulverized coal preparation system will not be increased and leaked out）, it is different from the quality of steel ball using pulverized coal particle, by adjusting air door Flow, blast, which blows afloat collector, collects pulverized coal particle at hole, that is, seals pulverized coal particle and begin that it is returned in coal-grinding machine barrel, steel ball is still Meeting nature is fallen；Thread is provided with the middle part of falling sphere conduit, unties that screw thread can handle collector entrance and falling sphere catheter blockage is asked Topic；Air-lock device is installed in falling sphere conduit bottom, and air-lock device is mainly made up of baffle plate, rotating shaft, counterweight three parts, and air-lock device leans on Suction function is closed in the weight and coal pulverizer of counterweight, when total amount reaches pre-designed weight in falling sphere conduit, Air-lock device baffle plate is opened naturally, and the arm of force for adjusting balancing weight realizes control falling sphere amount and sealing cold air；Air-lock device bottom Transferring box plays middle elicitation effect, prevents the excessive accumulation of falling sphere amount from blocking air-lock device；Dredge the failure steel ball of exclusion, useless ball leads to Cross transferring box lower pipeline and fall into regular storage bin, storage bin can store the failure steel ball excluded for more than three days, useless ball.

The utility model is to be lost according to the operation principle of coal pulverizer, device structure and practical operation situation, steel ball in abrasion The coal pulverizer port of export can be mainly deposited in after effect, is rotated with the further operation of coal pulverizer, the addition of a large amount of raw coal, new steel ball And rotation, the failure ball thrown will promote failure steel ball constantly to be accumulated to cartridge outlet end, and grind under dry wind mobilization Coal machine outlet arranges that fixing short tube gap using insertion type horizontal with coal pulverizer rotary barrel coordinates, clearance seal in 45° angle Form is shroud sealing clamp, throws and falls after rise and the failure ball of accumulation is rested at horizontal fixed short tube, the ball that such as fails grind into Shroud sealing clamp can damage equipment, and fixed short circuit middle part installation failure steel ball gives up, and ball collector is most suitable, and collector is Long arc shape box structure bottom perforate welding falling sphere conduit, bore dia 25mm, failure steel ball, useless ball for collecting export；For Prevent pulverized coal particle from being dropped out with failure steel ball while lead, design is provided with and seals coal airduct on falling sphere conduit under collector（The wind regime Exported quoted from mill exhauster, pulverized coal preparation system will not be increased and leaked out）, because pulverized coal particle is different from the quality of steel ball, by adjusting wind Door flow, blast, which blows afloat collector, collects pulverized coal particle at hole, and beginning, it is returned in coal-grinding machine barrel, and steel ball can still be fallen naturally； Thread is provided with the middle part of falling sphere conduit, collector entrance and falling sphere catheter blockage problem can be handled by untiing screw thread；Falling sphere conduit Bottom is provided with air-lock device, and air-lock device is mainly made up of baffle plate, rotating shaft, counterweight three parts, and air-lock device leans on the weight of counterweight It is closed with suction function in coal pulverizer, when total amount reaches pre-designed weight in falling sphere conduit, air-lock device gear Plate is opened naturally, and the arm of force for adjusting balancing weight realizes control falling sphere amount and sealing cold air；Transferring box plays middle elicitation effect, prevents Air-lock device is blocked in the excessive accumulation of falling stop ball amount；Dredge the failure steel ball of exclusion, useless ball falls into the regular storage bin in bottom, storage bin The failure steel ball excluded for more than three days, useless ball can be stored, can periodic cleaning.

Claims (1)

1. a kind of on-line automatic control sieve of coal pulverizer failure ball takes device, it is characterised in that：In the horizontal fixed short tube of coal pulverizer（1） Below be provided with conical collector（502）, conical collector（502）It is suitable for reading that sieve numbness is installed（4）, conical collector（502）Under Bring out mouth and be installed with conduit（510）, upper conduit（510）Pass through airduct（501）It is connected with envelope coal airduct, and in airduct （501）It is provided with volume damper, upper conduit（510）Lower end passes through thread（504）Downcomer is installed（511）, under Conduit（511）Lower end is provided with out ball sheath（512）, go out ball sheath（512）Outlet be inclined-plane ball mouth (515), going out ball Sheath（512）Short side（513）Bottom is provided with rotating shaft（503）, in rotating shaft（503）On be provided with lock gas transposition（507）With with Weight bar（506）, lock gas transposition（507）Inclined surface ball mouth（515）；In corresponding inclined-plane ball mouth（515）There is inside below For the useless ball transferring box on slope（508）, give up ball transferring box（508）Useless ball storage bin is placed below in following ball mouth（509）.