CN200954454Y - Automatic ball-sieving device of coal grinder - Google Patents
Automatic ball-sieving device of coal grinder Download PDFInfo
- Publication number
- CN200954454Y CN200954454Y CN 200620138213 CN200620138213U CN200954454Y CN 200954454 Y CN200954454 Y CN 200954454Y CN 200620138213 CN200620138213 CN 200620138213 CN 200620138213 U CN200620138213 U CN 200620138213U CN 200954454 Y CN200954454 Y CN 200954454Y
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- CN
- China
- Prior art keywords
- ball
- coal pulverizer
- flute profile
- ball device
- automatic sieve
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Abstract
The utility model relates to a coal grinding mechanism, in particular to an automatic ball sieving device of coal grinding machine, comprising a multi-hole slot-shaped lining plate which is arranged in the inner side of the end cap at the outlet of coal grinding machine and is used to select steel balls, the multi-hole slot-shaped lining plate is arranged fixedly in the inner side of the end cap at the outlet of coal grinding machine by screws and is provided with a hollow cavity which balls come out from, the main body of the ball sieving device is provided with an inner spiral tube, the inner spiral tube is provided with an inner spiral plate, a laminated spiral plate is arranged between the inner spiral tube and the outer spiral tube, the laminated spiral plate and the inner spiral plate have opposite turn directions and are intersected at the side of powder discharge elbow, a fixed type high-level slot-shaped ball collector is arranged at one side of the powder discharge elbow, the utility model has convenient, safe and reliable application, and can realize the online automatic ball sieving selection and can be popularized in the power factory widely.
Description
Technical field
The utility model relates to the coal-grinding mechanism of thermal power plant, is specifically related to the Automatic sieve ball device of coal pulverizer.
Background technology
The coal pulverizer own vol is bigger, power consumption is higher, a certain amount of proportioning steel ball (DTM350/600 type coal pulverizer is housed in the cylindrical shell, steel ball loading capacity in the cylindrical shell is 64T, normal operation is after 2500 hours, the defective steel ball that is worn accounts for about 10T more than 1/5th), to raw coal bump, extruding and grinding, raw coal is developed into the coal dust that meets the requirements by steel ball.In process of lapping, between steel ball and the steel ball, produce wearing and tearing between steel ball and the lining tile, (ton coal metal consumption 100-300g/t, 90% is worn steel ball, 10% is wear liner.Standard steel bulb diameter ￠ 30～￠ 60mm) when worn steel ball is following to certain value (￠ 25mm), substantially raw coal is lost bump, grinds function, and become the inefficacy steel ball and take the useful space in the cylindrical shell.The inefficacy steel ball can not in time be removed, and is continued to grind to form iron powder by big steel ball in process of lapping, makes that iron-holder increases in the coal dust, and boiler combustion is had a direct impact.
Coal pulverizer is when moving continuously, part steel ball is worn gradually, along with running time is increasing, often need to add a certain amount of new steel ball, adding along with raw coal and steel ball, the steel ball of throwing when rotated, wind powder (negative pressure) effect of aloft being flowed because of the small ball quality is little, is promoted by wind than big steel ball is easier down, most of small ball moves to the port of export, make discarded small ball be deposited in port of export place, when accounting in the cylindrical shell certain proportion, one ton of the every increase of inefficacy steel ball, operating current increases 1.5A, has increased the coal pulverizer power consumption.
According to the provisions of the relevant regulations issued by the State, when worn steel ball arrived setting, it was discarded to sieve, to guarantee coal pulverizer normal output and consumption reduction.Relatively, pulverizer capacity differs about 5～8% before and after each cleaning inefficacy steel ball.Worn steel ball amount to second-rate is very high especially, and very short time just needs cleaning inefficacy steel ball.A large amount of small balls accumulate in the cylindrical shell, and stopped flowing of coal dust, the inner flow passage area is reduced, the section resistance increases in (drying is exerted oneself constant) tube under same wind-force, and center wind powder velocity of medium increases, and ventilation reduces, the grinding flour ability drop of steel ball, when small ball quantity reach necessarily than the time, pulverizer capacity will descend significantly, during the operating current value of reaching capacity.
In addition,, make that the content of iron powder increases in the coal dust, cause steam generator system combustion instability, slagging scorification if the untimely removing of steel ball of losing efficacy can be continued to grind to form iron powder by big steel ball; Increase coal pulverizer running moment of torsion, reduce corollary equipment service life; Coal-supplying amount is reduced, and prolong running time.For a long time the inefficacy steel ball is screened; can only after shutdown, lean on the sorting of manual work mode; can't realize online automatic screening; how to put into practice the cartridge type coal pulverizer in the operation process of lapping with automatic screening such as the small ball that lost efficacy, stones, be the long-term key subjects of exploring of such production enterprise always.
Summary of the invention
The purpose of this utility model is to overcome the problems such as online screening that prior art can not realize coal pulverizer, and propose a kind of esy to use, safe and reliable, can be implemented in line automatic screening steel ball, the coal pulverizer Automatic sieve ball device that can generally promote the use of in the thermal power plant.
The technical solution of the utility model is as follows: a kind of coal pulverizer Automatic sieve ball device, be arranged between coal pulverizer and the powder delivery elbow, its structure comprises and is arranged on the porous flute profile liner plate that coal pulverizer outlet end cap inboard is used for the sorting steel ball, porous flute profile liner plate and shell are fixed on the main body of coal pulverizer with screw assembly, and leave out the cavity of ball, be provided with inner helix pipe in the sieve ball device main body, inner helix pipe is provided with inner screwy fin, be provided with the interlayer flight between inner helix pipe and the outer spiral tube, the interlayer flight is opposite with the inner screwy fin rotation direction, and intersect in powder delivery elbow side, fixed high-order flute profile ball-receiver is positioned near powder delivery elbow one side.
Aforesaid coal pulverizer Automatic sieve ball device, wherein, the mesh surface of porous flute profile liner plate is the fillet rectangle, and section is two trapezium structures that the top is relative, and two bases lay respectively at two surfaces, inside and outside of porous flute profile liner plate, and are provided with cavity inside; The width at the minimum place of sieve aperture is 22mm～25mm.
Aforesaid coal pulverizer Automatic sieve ball device, wherein, inner screwy fin and interlayer flight are that steel material is made, and the acute angle that is become with horizontal line is greater than 45 degree, and quantity can be each 4,6 or 8.
Aforesaid coal pulverizer Automatic sieve ball device wherein, is welded with lock ball device and reverse lock ball device respectively on outer spiral tube two ends and two ends interlayer flight.
Aforesaid coal pulverizer Automatic sieve ball device, wherein, inner helix pipe is provided with the toss device near the inner screwy fin of an end of powder delivery elbow, and the toss device is the sealene triangle shape.
Aforesaid coal pulverizer Automatic sieve ball device, wherein, ball mouth is located on the inner helix pipe, under the toss device.
Aforesaid coal pulverizer Automatic sieve ball device, wherein, fixed high-order flute profile ball-receiver is trapezoidal flute profile ball-receiver connection falling sphere pipe by a cross section and forms, and the falling sphere pipe is provided with inspection socket, and the below connects ball collecting device.
Aforesaid coal pulverizer Automatic sieve ball device, wherein, the device of blocking is installed on the circular arc of powder delivery elbow and internal and external screw pipe adjacent, and it has occupied following half circular arc of meal outlet elbow.
The utility model when operation the foreign material such as different small ball, stone that can will give up in time sift out, increased in the cylindrical shell effectively flow area, only leave qualified steel ball in the cylindrical shell, improve the overall grainding capacity of steel ball, thereby improve coal pulverizer efficient, reduced unit power consumption of coal pulverizing.And solved the difficult problem that the coal pulverizer power that can not overfill is for a long time moved, an and artificial separation difficult problem.It is esy to use, safe and reliable, can generally promote the use of in the thermal power plant.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a spiral tube structure schematic diagram of the present utility model.
Fig. 3 is the utility model porous flute profile lining plate structure schematic diagram.
Fig. 4 is a B-B partial sectional view among Fig. 3.
Fig. 5 is a fixed high-order flute profile ball-receiver structural representation of the present utility model.
Fig. 6 is the side view of Fig. 5.
Fig. 7 is the vertical view of Fig. 5.
Among the figure, 1. porous flute profile liner plate 2. outer spiral tubes 3. inner helix pipes 4. powder delivery elbows 5. ball-receivers 6. falling sphere pipes 7. inspection sockets 8. bolt assemblies 9. shells 10. closed receipts ball casees 11. device 12. toss devices 13. lock ball devices 14. reverse lock ball device 15. inner screwy fins 16. interlayer flights 17. ball mouths of blocking
The specific embodiment
As shown in Figure 1, this practical coal pulverizer Automatic sieve ball device comprises that coal pulverizer outlet end cap inboard is used for the porous flute profile liner plate 1 of sorting steel ball, porous flute profile liner plate 1 and shell 9 usefulness bolt assemblies 8 are fixed on the coal pulverizer main body, and leave out the cavity of ball, be provided with inner helix pipe 3 in the sieve ball device main body, inner helix pipe is provided with inner screwy fin 15, be provided with interlayer flight 16 between inner helix pipe 3 and the outer spiral tube 2, interlayer flight 16 is fixed on outer spiral tube 3 and the inner helix pipe 2, and interlayer flight 16 is opposite with inner screwy fin 15 rotation directions, and intersect in powder delivery elbow side, fixed high-order flute profile ball-receiver is positioned near powder delivery elbow one side.
As shown in Figure 3, Figure 4, the mesh surface of porous flute profile liner plate 1 is the fillet rectangle in the coal pulverizer Automatic sieve ball device, cutaway view is two trapezium structures that the top is relative, and two bases lay respectively at two surfaces, inside and outside of porous flute profile liner plate 1, and are provided with cavity inside; The width at the minimum place of sieve aperture is 22mm～25mm, and the length of sieve aperture is decided according to the concrete model of coal pulverizer; The acute angle that inner screwy fin and interlayer flight are become with horizontal line is greater than 45 degree, and according to the model of different coal pulverizers, can be designed to each 4,6 or 8; The lock ball device is welded on outer spiral tube 2 two ends and two ends interlayer flight 16, is called reverse lock ball device 14 near porous flute profile liner plate 1 one ends, and an end of close powder delivery elbow is called lock ball device 13; Inner helix pipe 3 is provided with toss device 12 near the inner screwy fin 15 of an end of powder delivery elbow 4, and toss device 12 is the sealene triangle shape; Ball mouth 17 is located on the inner helix pipe 15, under the toss device 12; Fixed high-order flute profile ball-receiver is positioned at powder delivery elbow 4 one ends, is trapezoidal flute profile ball-receiver 5 connection falling sphere pipes 6 by a cross section and forms, and falling sphere pipe 6 is provided with inspection socket 7, and the below connects ball collecting device 10; Kick back 11 is installed on the circular arc of powder delivery elbow and internal and external screw pipe adjacent, and it has occupied following half circular arc of meal outlet elbow, can prevent effectively that steel ball plays the effect of bounce-back steel ball to the jam of dynamic and static cooperation place in running.
The course of work of coal pulverizer Automatic sieve ball device is as follows: coal pulverizer Automatic sieve ball device rotates with coal pulverizer always, in running, the steel ball of throwing is subjected under the wind powder mobilization, pushing the inefficacy steel ball to the meal outlet place heaps, the inefficacy steel ball is being thrown in the rotation, when leaving along the flank movement of semi-cone angle inclination angle round platform, be easy to the selected sieve aperture that advances porous flute profile liner plate 1, drain in the cavity of porous flute profile liner plate 1, freely fall to when in rotation, being brought into a high position in the inner helix pipe 3 and many runners of outer spiral tube 2 formed orientations of coal pulverizer automatic screening device, the thrust of interlayer flight 16 is pushed the inefficacy steel ball to ball mouth 17 during by 2 rotations of interlayer helix tube, the reverse lock ball device 14 of interlayer helix tube can effectively stop the inefficacy steel ball to skid off the outer spiral tube 2 and many runners of inner helix pipe 3 formed orientations of coal pulverizer automatic screening device simultaneously, lock ball device 13 can effectively lock the inefficacy steel ball, make the inefficacy steel ball when rotating, be unlikely to landing along with coal pulverizer Automatic sieve ball device, when being threaded to a high position, the inefficacy steel ball, foreign material such as stone are dished out under deadweight and rotary centrifugal force acting in conjunction, fall on the ball-receiver 5 of the fixed high-order ball-receiver that high site is provided with, through falling sphere pipe 6, fall in the closed receipts ball case 10.
The utility model can thoroughly overcome the problem that prior art can not realize the online screening of coal pulverizer, and esy to use, safe and reliable, the coal pulverizer Automatic sieve ball device that can generally promote the use of in the thermal power plant.
Claims (8)
1. coal pulverizer Automatic sieve ball device, be arranged between coal pulverizer and the powder delivery elbow, it is characterized in that: be provided with the porous flute profile liner plate (1) that is used for the sorting steel ball in the coal pulverizer exit, porous flute profile liner plate (1) and shell (9) are fixed on coal pulverizer outlet end cap inboard with screw assembly (8), and leave out the cavity of ball, be provided with inner helix pipe (3) in the sieve ball device main body, inner helix pipe is provided with inner screwy fin (15), be provided with interlayer flight (16) between inner helix pipe (3) and the outer spiral tube (2), interlayer flight (16) is opposite with inner screwy fin (15) rotation direction, and intersect in powder delivery elbow (4) side, fixed high-order flute profile ball-receiver is positioned at powder delivery elbow (4) one sides.
2. coal pulverizer Automatic sieve ball device as claimed in claim 1, it is characterized in that: the mesh surface of porous flute profile liner plate (1) is the fillet rectangle, section is two trapezium structures that the top is relative, two bases lay respectively at two surfaces, inside and outside of porous flute profile liner plate (1), and are provided with cavity inside; The width at the minimum place of sieve aperture is 22mm～25mm.
3. coal pulverizer Automatic sieve ball device as claimed in claim 1 is characterized in that: inner screwy fin (15) and interlayer flight (16) are made for steel material, and the acute angle that is become with horizontal line is greater than 45 degree, and quantity can be each 4,6 or 8.
4. coal pulverizer Automatic sieve ball device as claimed in claim 1 is characterized in that: be welded with lock ball device (13) and reverse lock ball device (14) on outer spiral tube (2) two ends and two ends interlayer flights (16) respectively.
5. coal pulverizer Automatic sieve ball device as claimed in claim 1 is characterized in that: inner helix pipe (3) is provided with toss device (12) near the inner screwy fin (15) of an end of powder delivery elbow (4), and toss device (12) is the sealene triangle shape.
6. coal pulverizer Automatic sieve ball device as claimed in claim 5 is characterized in that: ball mouth (17) is located at that inner helix pipe (3) is gone up, toss device (12) under.
7. coal pulverizer Automatic sieve ball device as claimed in claim 1, it is characterized in that: fixed high-order flute profile ball-receiver is trapezoidal flute profile ball-receiver (5) connection falling sphere pipe (6) by a cross section and forms, falling sphere pipe (6) is provided with inspection socket (7), and the below connects ball collecting device (10).
8. as claim 1 or 5 described coal pulverizer Automatic sieve ball devices, it is characterized in that: the device of blocking (11) is installed on the circular arc of powder delivery elbow (4) and internal and external screw pipe adjacent, and it has occupied following half circular arc of meal outlet elbow (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620138213 CN200954454Y (en) | 2006-09-18 | 2006-09-18 | Automatic ball-sieving device of coal grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620138213 CN200954454Y (en) | 2006-09-18 | 2006-09-18 | Automatic ball-sieving device of coal grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200954454Y true CN200954454Y (en) | 2007-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620138213 Expired - Fee Related CN200954454Y (en) | 2006-09-18 | 2006-09-18 | Automatic ball-sieving device of coal grinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200954454Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9211547B2 (en) | 2013-01-24 | 2015-12-15 | Lp Amina Llc | Classifier |
-
2006
- 2006-09-18 CN CN 200620138213 patent/CN200954454Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9211547B2 (en) | 2013-01-24 | 2015-12-15 | Lp Amina Llc | Classifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071003 Termination date: 20150918 |
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| EXPY | Termination of patent right or utility model |