• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A bowl mill has a vertical mechanism to drive a milling bowl and a hot-air supply to an air box positioned below the bowl. An evacuator is positioned in the air box to prevent the box from overflowing when the mill shuts down suddenly. The evacuator has a drive mechanism that is separate from and independent of the mechanism that drives the mill.
    公开号:SU1376933A3
    申请号:SU843794614
    申请日:1984-10-01
    公开日:1988-02-23
    发明作者:Виллах Рудольф；Дибовски Гюнтер
    申请人:Дойче Бабкок Верке Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a material grinding technique and can be used in the fuel and energy industry for grinding coal B to a disc-shaped mill.
    The purpose of the invention is to prevent the backfill of the air duct during emergency shutdown of the mill.
    Figure 1 presents the proposed mill, a vertical section; figure 2 - section aa in figure 1; on fig.Z - ring cleaner, scan along the line; Figures 4 and 5 are variants of a cleaner, horizontal projection out; on fig.b - an air duct with a cleaner according to another variant, digging a vertical section.
    . The mill has a housing 1, forming a working cavity 2 of the mill, inside of which there are stationary grinding rolls. 3, which roll on the bowl of 4 runners. Through the part 5 of the pressure and the total pressure of the ring 6 for all the grinding rollers 3 on the grinding rollers 3 there is a necessary grinding pressure. The bowl of 4 runners is resting on the carrier 7, which is connected to the driven flange of the gear. . .
    In the lower part of the housing 1 there is an annular air duct 8 that surrounds the carrier 7 running bows; un. An air duct 8 is connected to a supply 9 for hot air. Through the nozzle apparatus 10, the air duct 8 is connected to the working cavity 2 of the mill. The hot air coming out of the nozzle apparatus 10 captures coal dust crushed by grinding rollers 3, carries it through a screening device located in the upper part of the working cavity 2 of the mill and then supplies it through the dust piping to the burners of the boiler furnace.
    When the boiler plant is quickly disconnected due to damage, the supply of hot air to the nozzle apparatus 8 is instantly interrupted and the mill stops. In this case, the coal drone falls down in the working cavity 2 of the mill. In this case, most of the coal is collected at the 4-runner level, and a smaller and, in particular, cc-fine, constituent coal dust enters the air duct 8.
    To remove the collected coal dust, it is provided in the air box.
    8 cleaner 11, which has its own drive, independent of the drive of the mill. The cleaner 11 delivers the coal dust to one or more outlets 12, which are located in the bottom of the air box 8 and communicated with the remote chute 13.
    0 Cleaner 11 may consist of two concentric rings 14 and 15, which are connected by means of steel scrapers 16. Steel scrapers 16 are at least partially radially directed. As shown in the right half of FIG. 2, the outlet 12 is directed across the entire radial width of the annular air duct 8. In this case, the steel
    0 scrapers 16 are located radially along their entire length.
    In the left half of Fig. 2, the outlet 12 is located radially, but passes only along part of the radial width of the bottom of the air duct 8 and is adjacent to the outer wall of the duct. According to this embodiment, only a part of the steel scrapers 16 has a radial direction.
    0 The length of the radial section of the steel scrapers 16 corresponds approximately to the radial width of the outlet 12. In the rest of its length, the steel scrapers 16 are bent so that they oppose the direction of movement of the cleaner 11 tangentially to the inner ring 15. When moving, the cleaner 11 is inside material
    0, by means of the tangential portions of the steel scrapers 16, is fed out to the outlet 12.
    Cleaner 11 can be made with any drive. Preferred
    5 intermittent drive with ratchet mechanism. In this case, according to FIG. 2, the outer ring 14 has locking teeth 17 on its upper face, in which i includes a pawl 18. The pawl 18 is located on t 19, which is moved by means of a reciprocating, preferably Hydraulic actuator 20. Instead of a hydraulic actuator 20 may be
    applied, for example, a rack drive or crank mechanism. The rotational speed of the scraper 16 is preferably lower than the rotational speed of the carrier 7 of the runner bowl.
    Cleaner 11 can operate either permanently or temporarily, with the mill turned off and running.
    The pawl 18 is fastened with the possibility of swinging on the rige 19. Due to this, under the action of its own weight, it can enter the gap between the two locking teeth and at the same time penetrate the material inside the air duct 8 at the height of the locking teeth 17. This movement is facilitated by the construction of the pawl 18, which has the appearance of a cutting tool. To prevent possible bulking of the 19 bulk material according to FIG. 3, the pawl 18 is positioned above one of the outlets 12 in the bottom of the air duct 8. openings 12. Rings 14 and 15 may consist of segments connected to each other. Steel scrapers 16 are attached at the junction points of the segments. This junction can be made in such a way that the jumpers 21 on both sides of the junction are welded to the segments of the rings 14 and 15. The jumpers 21 close the steel scraper 16 together and bolt together. The ends of the steel scrapers 16 can be welded to the steel strips 22, which are screwed on both sides of the junction of the segments onto the rings 14 and 15.
    Rings 14 and 15 have one or several notches on their lower face, the protrusions 23 of which are opposed
    J5
    20
    25
    45
    u j: 7ulv 1 u MSH / J} Jaif i ri.JV. l jl l
    The protrusions 23 are bent outward in the direction of rotation of the cleaner 11. The material that is outside of the rings 14 and 15 in the airbox 8, as the cleaner 11 rotates, enters through the holes of the rings 14 and 15 inwards and is gripped by steel scrapers 16.
    At the top of the outer 14 or inner 15 ring, limiters 24 are provided, which are fixed to the fixed parts of the mill. The limiters 24 prevent lifting the cleaning scraper, 11 with the accumulation of material in the air box 8,
    scrapers 16 are angled relative to each other. One of the ends of these steel scrapers 16 is mounted either on the outer ring 14 or on the inner ring.
    15. The free ends of the steel scrapers 16 are connected to each other. If the cleaner 11 has an outer ring 14, then it is. can be provided with locking teeth 17, as well as a cleaner 11 consisting of two rings. When using only one inner ring 15, the drive pawl 18 can engage with loose, connected to each other ends of steel scrapers
    16. Each of the noted cleaners can be performed with a stop 17 with a crown 17 of the crown 25, which is attached to the steel scrapers 16.
    Cleaner 11 may be adjacent to the bottom of the air box 8. It may also be suspended at some distance from the unit on fixed parts of the tool. Such a structure is presented, for example, in Fig. 6 and consists of laying 1x shoulders 26. Bearing shoulders 26 are fixed on pressure ring 6 and carry rollers 27 at their lower ends. Rollers 27 interact from below with flanges 28, fixed on cleaner 11, for example, on the crown 25. The rollers 27 can also be drilled on the rods, which are inserted through the housing 1 into the air duct 8.
    Between the rings 14 and 15, one or several wire brushes 29 are attached, the wires of which are in contact with the bottom of the air box 8. The wire / field brushes 29 are used to receive fine material not trapped by steel scrapers 16 and transport it to the outlets 12. With such the same purpose can also be applied to the scraper chains 30, which are fixed in the Direction of rotation of the cleaner 11 on the reverse side of the steel scrapers 16. Separate links of the scraper chains 30 are connected to each other. The outer links of the chains of the last row are additionally fixed on the rings 14 and 15. The scraper chains can be hung to the jumpers 30
    35
    50
    As shown in Figures 4-6, cleansers that tighten rings 14 and 15;
    l 10
    J5
    20
    25
    45
    l l
    3769334
    scrapers 16 are angled relative to each other. One of the ends of these steel scrapers 16 is mounted either on the outer ring 14 or on the inner ring.
    15. The free ends of the steel scrapers 16 are connected to each other. If the cleaner 11 has an outer ring 14, then it is. can be provided with locking teeth 17, as well as a cleaner 11 consisting of two rings. When using only one inner ring 15, the drive pawl 18 can engage with loose, connected to each other ends of steel scrapers
    16. Each of the noted cleaners can be performed with a stop 17 with a crown 17 of the crown 25, which is attached to the steel scrapers 16.
    Cleaner 11 may be adjacent to the bottom of the air box 8. It may also be suspended at some distance from the unit on fixed parts of the tool. Such a structure is presented, for example, in Fig. 6 and consists of laying 1x shoulders 26. Bearing shoulders 26 are fixed on pressure ring 6 and carry rollers 27 at their lower ends. Rollers 27 interact from below with flanges 28, fixed on cleaner 11, for example, on the crown 25. The rollers 27 can also be drilled on the rods, which are inserted through the housing 1 into the air duct 8.
    Between the rings 14 and 15, one or several wire brushes 29 are attached, the wires of which are in contact with the bottom of the air box 8. The wire / field brushes 29 are used to receive fine material not trapped by steel scrapers 16 and transport it to the outlets 12. With such the same purpose can also be applied to the scraper chains 30, which are fixed in the Direction of rotation of the cleaner 11 on the reverse side of the steel scrapers 16. Separate links of the scraper chains 30 are connected to each other. The outer links of the chains of the last row are additionally fixed on the rings 14 and 15. The scraper chains can be hung to the jumpers 30
    35
    50
    - Cams that have rings 14 and 15;
    Tel 11 may also have only one single ring. When using steel construction
    Invention Form
    .one. A mill containing a bowl with a rotating drive around a vertical
    the axles, the housing forming a working cavity above the bowl, in which the rolls, mounted under the bowl, have an annular air duct, communicate with the working cavity and are made with a vent hole in the bottom and with a wiper inside it that has radially located scrapers, about l and h and - w; and so that, in order to prevent the backfill of the air box during an emergency shutdown of the mill, the spruce will be cleaned with at least one ring to which the scrapers are attached, and an individual attachment. house made with ratchet mechanism.
    2. Mill pop.1, distinguished by the fact that the cleaner is equipped with two concentric rings, between which there are scrapers made of steel.
    3. The mill according to claims 1 and 2, which means that the scrapers are made with a bend that runs tangentially relative to the inner ring, and the length of the scraper section to the bend corresponds to the width of the outlet in the bottom of the air duct.
    4. Mill according to claims 1-3, characterized in that the rings are made with notches in the lower part and with external projections located on the edges of the notches during the rotation of the cleaner,
    5. The mill but the PP.1-4, about the TL and - so that the scrapers are installed above the bottom of the air box with a gap.
    6. Mill according to claims 1-5, characterized in that the air box is made with one or several limiters located above the scrapers.
    7. The mill in, 5 and 6, about tl and .4 and y with the fact that the cleaner is equipped with one ring, and the sko0
    five
    0
    five
    0
    five
    0
    five
    the side is made of two plates connected by ends with each other at an angle.
    8. The mill according to claims 1–7, from which it is evident that the teeth of the ratchet mechanism are made on the upper face of one of the rings, and the paw of this mechanism is connected to the hydraulic drive by means of pull.
    9. The mill according to claims 1 and 8, about tl and - so that the ratchet pawl is located above the outlet in the bottom of the air box and its stroke corresponds to - the width of the outlet.
    10. Mill according to claims 1 and 7, that is, that the ratchet pawl is mounted above the plate connections with each other.
    11. Mill according to claims 1-7, characterized in that the cleaner is provided with a crown mounted on the scrapers, on which the ratchet gear teeth are made.
    12. The mill according to claims 1-11, about tl and is often so that at least one wire brush is attached to the rings in contact with the bottom of the air duct.
    13. The mill according to claims 1-12, about tl and often with the fact that the cleaner is made with scraper chains.
    14. Mill according to claims 1-13, about tl and often with the fact that the scraper chains are attached to the steel scrapers and are interconnected and with the rings.
    15. The mill according to claims 1 and 13, T - that the cleaner is provided with bridges between, the rings and the scraper chains are suspended thereto.
    16. Mill PP, 1-15, about tl and - so that the rings are made of segments connected to each other, and the scrapers are attached to the rings at the points of their connection.
    15
    25
    u
    g.Z.
    2 /
    Jq
    yy
    2
    FIG. C
    U3.5
    权利要求:
    Claims (16)
    [1]
    Claim
    1. Mill containing a bowl with a rotation drive around a vertical
    5 1376933 6 axes, a housing forming a working cavity above the bowl, in which there are rolls mounted on the bowl, an annular air box installed under the bowl, communicating with the working cavity and made with an outlet, an opening in the bottom and with a cleaner located inside it having radially arranged scrapers, with the exception of the fact that, in order to prevent filling of the air box during emergency shutdown of the mill, the cleaner is equipped with at least one ring to which the scrapers are attached and an individual drive. a house made with a ratchet mechanism.
    [2]
    2. The mill according to claim 1, characterized in that the cleaner 20 is equipped with two concentric rings, between which are located scrapers made of steel.
    [3]
    3. The mill according to claims 1 and 2, characterized in that the scrapers 25 are made with a bend that extends tangentially relative to the inner ring, and the length of the section of the scraper before bending corresponds to the width of the outlet in the bottom of the air box.
    [4]
    4. The mill according to claims 1 to 3, characterized in that the rings are made with recesses in the lower part and with external protrusions located on the edges of the recesses, which are located at the rear edges of the cleaner along the rotation of the cleaner,
    [5]
    5. The mill according to claims 1 to 4, characterized in that the scrapers are installed above the bottom of the air
    40 robe with a gap ·
    [6]
    6. The mill according to claims 1-5, characterized in that the air box is made with one or more limiters located above the scrapers.
    [7]
    7. The mill according to claims 1, 5 and 6, which is characterized by the fact that the cleaner is equipped with one ring, and the scraper is made of two plates connected by ends at an angle to one another.
    [8]
    8. The mill according to claims 1 to 7, characterized in that the teeth of the ratchet mechanism are made on the upper face of one of the rings, and the dog of this mechanism is connected to the hydraulic drive by means of traction.
    [9]
    9. The mill according to claims 1 and 8, characterized in that the ratchet dog is located above the outlet in the bottom of the air box and its stroke corresponds to the width of the outlet.
    [10]
    10. The mill according to claims 1 and 7, kicking by the fact that the ratchet dog is installed above the plate joints one with the other.
    [11]
    11. The mill according to claims 1 to 7, characterized in that the cleaner is equipped with a crown mounted on the scrapers, on which the teeth of the ratchet mechanism are made.
    [12]
    12. The mill according to claims 1 to 11, characterized in that at least one wire brush is attached to the rings in contact with the bottom of the air box.
    [13]
    13. The mill according to claims 1-12, which is characterized in that the cleaner is made with scraper chains.,
    [14]
    14. The mill according to claims 1 to 13, characterized in that the scraper chains are mounted on steel scrapers and connected to each other and to the rings.
    [15]
    15. The mill according to claims 1 and 13, characterized in that the cleaner is equipped with jumpers between, the rings and scraper chains are suspended from them.
    [16]
    16. The mill according to claims 1 to 15, characterized in that the rings are made of segments connected to each other, and the scrapers are attached to the rings at the points of their connection.
    A ~ A
    Fig.Z
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    同族专利:
    公开号 | 公开日
    DE3344223A1|1985-06-20|
    JPS60125261A|1985-07-04|
    US4600157A|1986-07-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2289727A|1940-03-12|1942-07-14|Oliver W Randolph|Feed mill and method of preparing animal fodder|
    US3951347A|1972-09-21|1976-04-20|Polysius Ag|Apparatus for crushing material containing particles that are hard to pulverize|US4935983A|1987-07-08|1990-06-26|Mazda Motor Corporation|Windshield wiper system|
    DE3741611A1|1987-12-09|1989-06-22|Babcock Werke Ag|ROLL BOWL MILL|
    JP2730656B2|1992-03-06|1998-03-25|宇部興産株式会社|Vertical crusher|
    JP2704477B2|1992-03-09|1998-01-26|宇部興産株式会社|Vertical crusher|
    US5263655A|1992-03-26|1993-11-23|The Babcock & Wilcox Company|Coal pulverizer|
    US5263855A|1992-05-14|1993-11-23|The Babcock & Wilcox Company|Low pressure drop rotating vertical vane inlet passage for coal pulverizer|
    US5340041A|1992-11-25|1994-08-23|The Babcock & Wilcox Company|Welded rotating annular passage segment for coal pulverizers with replaceable vanes and adjustable passage port area|
    US5480099A|1994-06-27|1996-01-02|March-Southwestern Corp.|Mill sweep for pulverizers|
    JP5791556B2|2012-03-26|2015-10-07|三菱日立パワーシステムズ株式会社|Vertical crusher|
    US9662657B2|2014-01-21|2017-05-30|Mannarsamy Balasubramanian|Multi-purpose food grinding machine|
    US10376894B2|2014-02-14|2019-08-13|Glennon C. Sontag|Grinder|
    DE102015203856A1|2015-03-04|2016-12-15|Thyssenkrupp Ag|Vertical roller mill|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19833344223|DE3344223A1|1983-12-07|1983-12-07|BOWL MILL|
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