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WO2019097998A1 - Broyeur vertical et procédé de commande de pression de rouleau de broyage pour broyeur vertical - Google Patents

Broyeur vertical et procédé de commande de pression de rouleau de broyage pour broyeur vertical Download PDF

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Publication number
WO2019097998A1
WO2019097998A1 PCT/JP2018/040141 JP2018040141W WO2019097998A1 WO 2019097998 A1 WO2019097998 A1 WO 2019097998A1 JP 2018040141 W JP2018040141 W JP 2018040141W WO 2019097998 A1 WO2019097998 A1 WO 2019097998A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
swing lever
rod
roller
rotary table
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/040141
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English (en)
Japanese (ja)
Inventor
竜也 日名内
泰文 中尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Machinery Corp Ltd
Original Assignee
Ube Machinery Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ube Machinery Corp Ltd filed Critical Ube Machinery Corp Ltd
Priority to JP2019553786A priority Critical patent/JP7279641B2/ja
Publication of WO2019097998A1 publication Critical patent/WO2019097998A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the present invention relates mainly to a vertical crusher suitable for grinding organic materials such as coal, oil coke, slag, clinker, limestone, other inorganic materials, and biomass.
  • a crusher called a vertical crusher (sometimes referred to as a vertical mill or a vertical roller mill) is widely used as an apparatus for grinding coal and the like.
  • the vertical crusher is provided with a rotating table and a grinding roller which rotate inside the machine, and the raw material supplied on the rotating table is bitten by the grinding roller disposed on the rotary table to grind it efficiently.
  • a structure of a vertical crusher using a swing lever is well known as a structure for pressing the crush roller against the rotary table.
  • the swing lever is rotated by a hydraulic cylinder to press the crush roller against the rotary table.
  • the pressure (sometimes referred to as crusher roller pressure) to press the crusher roller in the direction of the rotary table according to the type of the material to be crushed by adjusting the pressure of the hydraulic cylinder. It is possible to adjust.
  • a vertical crusher using a swing lever for example, a type in which a crush roller is disposed on one end side of a swing lever pivotally supported and a hydraulic cylinder is disposed on the other end is well known. However, other forms are also known.
  • the thickness of the raw material layer staying on the rotating table is often adjusted to be constant by using a weir called a dam ring disposed on the outer periphery of the rotating table.
  • a weir called a dam ring is disposed on the outer periphery of the rotary table, there are cases where the thickness or the like of the raw material layer changes for some reason during the operation of the vertical crusher.
  • the amount or properties of the raw material supplied to the vertical crusher may change rapidly during operation, and in such a case, the grinding balance in the machine may change, and the thickness of the raw material layer may increase sharply. It may change.
  • the grinding roller pressure is properly adjusted by the hydraulic cylinder during operation of the vertical crusher, the thickness of the raw material layer on the rotary table changes rapidly during operation due to any cause In some cases, the grinding behavior becomes unstable.
  • a physical safety device such as a stopper is usually provided so that the grinding roller and the rotary table do not come in direct contact with each other.
  • the grinding roller rapidly approaches the rotating table even if metal touch is prevented by, for example, the stopper described above. Shock may occur and cause abnormal vibration.
  • patent document 1 The prior art as disclosed by patent document 1 is known as one of the methods of preventing the abnormal vibration which arises by the above-mentioned cause.
  • the prior art disclosed in Patent Document 1 is a technique of changing the pressure of the grinding roller in accordance with the state of the raw material layer on the rotary table.
  • Patent Document 1 The prior art disclosed in Patent Document 1 is described to be expected to have a certain effect in terms of preventing abnormal vibration.
  • the change in the material layer is estimated from the material supply amount and the like, and the reduction force of the grinding roller is changed based on the estimated result.
  • it is necessary to measure the situation with a sensor or the like estimate the state of the raw material layer based on the measured value, and calculate the appropriate pressure of the grinding roller .
  • the present invention has been made in view of the problems as described above, and in real time, in response to the case where the thickness of the raw material layer becomes suddenly thin during operation of the vertical crusher, Accordingly, the present invention relates to a vertical crusher suitable for efficiently crushing the raw material by stabilizing the crush behavior by preventing the crush roller from rapidly approaching the rotary table side.
  • the vertical crusher according to the present invention is (1)
  • the shredding roller is disposed on the swing lever pivotally supported, and the rod portion of the pressing cylinder and the swing lever are connected, and the rod portion is moved toward the cylinder portion of the pressing cylinder to turn the swing lever.
  • the rod portion of the pressing cylinder and the swing lever are connected via the connection portion
  • an elastic body is disposed between the cylinder portion and the connection portion of the pressing cylinder.
  • the elastic body is disposed such that a part or all of the rod portion is fitted on the outside.
  • the elastic body is a spiral wound spring.
  • the grinding roller pressure control method of a vertical crusher according to the present invention (4)
  • the shredding roller is disposed on the swing lever pivotally supported, and the rod portion of the hydraulic cylinder and the swing lever are connected, and the rod portion is moved to the cylinder portion side of the hydraulic cylinder to turn the swing lever.
  • the elastic body is disposed such that a part or all of the rod portion is externally fitted.
  • the elastic body is a spiral wound spring.
  • the vertical crusher according to the present invention is (7) A rotary table, a grinding roller disposed on the rotary table and driven to rotate with the rotation of the rotary table, and rotatably supported on a lever rotary shaft, the grinding roller being rotatable at one end
  • a pressing cylinder for moving the crushing roller toward the rotating table via the swing lever by the pressing cylinder, and crushing the raw material loaded on the rotating table with the crushing roller.
  • an elastic body is disposed between the connecting portion of the rod portion to the swing lever and the cylinder portion.
  • the crushing roller can be reliably prevented from rapidly approaching the rotary table by arranging elasticity in the hydraulic cylinder that drives the swing lever. it can.
  • FIG. 1 is a conceptual view for explaining the entire configuration of a vertical crusher
  • FIG. 2 (1) is an arrangement of grinding rollers on a rotary table
  • FIG. 2 is a figure explaining arrangement
  • FIG. 3 is a view for explaining the arrangement and structure of the swing lever, the grinding roller and the hydraulic cylinder.
  • FIG. 4 and 5 relate to another embodiment of the present invention, and are diagrams for explaining the arrangement and structure of a swing lever, a grinding roller and a hydraulic cylinder, and FIG. 4 shows a second embodiment, 5 shows 3rd Embodiment.
  • FIG. 6 is a view for explaining the structure of a hydraulic cylinder according to another embodiment of the present invention, and shows a fourth embodiment.
  • FIG. 7 is a conceptual view for explaining the entire configuration of the vertical mill according to the prior art with reference to FIG.
  • the vertical crusher 1 includes a casing 1B and 1A forming an outer shell of the vertical crusher 1 as shown in FIG. 1, a reduction gear 2B installed under the vertical crusher 1, and a drive motor A rotary table 2 driven by 2M, a conical grinding roller 3 and the like are provided.
  • the vertical crusher 1 includes an inverter power supply as a power supply for driving the drive motor 2M, and is a variable-speed-type vertical crusher 1 whose rotational speed can be arbitrarily changed during operation. Further, the vertical crusher 1 of the embodiment shown in FIG. 1 includes a classifier 24 above the rotary table 2.
  • the classification mechanism of the classifier 24 includes a plurality of fixed classification vanes 24A (generally referred to as a guide vane) arranged along the upper periphery of the inner cone 29 described later, and a stationary classification.
  • the rotary classification blade 24B is driven by a drive motor (not shown) installed on the upper part of the vertical crushing machine 1, and is configured to rotate freely.
  • the inner cone 29 has a large diameter and opens upward.
  • a plurality of fixed type classification vanes 24A constituting a part of the above-described classifier 24 are arranged in a ring shape at equal intervals.
  • the inner cone 29 has an opening 29A which is reduced in diameter toward the lower center and opened at the lower end thereof toward the center of the rotary table.
  • the inner cone 29 allows the raw material and the like that can not pass through the rotary classification blade 24B of the classifier 24 to fall into the interior from the greatly enlarged opening portion, and through the opening 29A formed at the lower end. , It is configured to be returned near the center of the turntable 2.
  • a raw material feed chute 35 extending from the top toward the direction of the rotary table is disposed.
  • the raw material supplied from the upper part of the vertical grinder 1 via the raw material supply chute 35 is configured to be introduced near the center of the rotary table 2.
  • the vertical crusher 1 of this type may also be referred to as a center chute type vertical crusher 1.
  • the vertical crusher 1 shown in FIG. 1 is provided with a gas supply port 33 for introducing a gas below the rotary table 2 and further for taking out a product together with the gas above the rotary table 2.
  • An upper outlet 39 is provided.
  • the vertical crusher 1 shown in FIG. 1 introduces the gas (in the present embodiment, air) from the gas supply port 33 during operation, whereby the classifier 24 is installed from below the rotary table A gas flow passing through and flowing to the upper outlet 39 is generated.
  • the raw material crushed on the rotary table 2 is blown up by the gas and ascends in the casing and flows in the direction of the classifier 24, but the large diameter and large-weight raw material can not reach the classifier 24. Alternatively, by falling without being able to pass, it becomes a circulating raw material which is circulated in the vertical mill 1 and crushed again. Then, the small diameter raw material having passed through the classifier 24 is taken out as a product from the upper outlet 39.
  • the vertical crusher 1 shown in FIG. 1 comprises a plurality of grinding rollers 3.
  • the plurality of grinding rollers 3 are disposed on the upper surface 2A of the rotary table 2 at equal intervals in the rotational direction, as shown in FIG. 2 (1).
  • four grinding rollers 3 are provided. These grinding rollers 3 are biased in the direction toward the rotary table 2 as shown in FIG. 2 (2).
  • the four crushing rollers 3 are disposed on the outer peripheral side of the upper surface 2A of the rotary table 2 so as to face each two of the orthogonal axes passing through the central axis of the rotary table 2.
  • the grinding roller 3 is rotated by the rotation table 2 via the raw material as the rotation table 2 rotates.
  • the type of the vertical crusher 1 that can be used in the present embodiment is not limited to that described above, and modifications can be made without departing from the technical concept of the present invention.
  • the pressing mechanism of the grinding roller 3 in the present embodiment is configured to pivotally support the swing lever 3A by a lever rotation shaft 3B supported by the casing 1A.
  • the lever rotation shaft 3B is supported by the casing 1A.
  • the scope of application of the present invention is of course not limited thereto, and, for example, steel installed on a foundation Or, a concrete stand may be installed, and a bearing for supporting the lever rotary shaft 3B may be installed on the stand and supported, and a known method or the like may be made without departing from the technical concept of the present invention Is available.
  • the crushing roller 3 is disposed in the upper arm portion on one end side of the swing lever 3A rotatably supported near the central portion by the lever rotation shaft 3B.
  • a bearing portion is formed on the upper arm portion of the swing lever 3A, and the grinding roller 3 is pivotally supported by a rotation shaft rotatably supported by the bearing portion to rotate the rotary table 2 It is configured to be rotatable in the direction.
  • a pressing cylinder 10 is connected to a lower arm portion on the other end side of the upper arm portion on the one end side of the swing lever 3A through a rod connecting shaft 3C.
  • the configuration of the swing lever that can be applied to the present invention is not limited to the type described above.
  • two members are connected via the lever rotation shaft 3b1 so that one swing can be obtained as conceptually shown in the side view and the rear view in (1) and (2) of FIG.
  • the lever 3a1 is configured.
  • the rod connecting shaft 3c2 is disposed at a portion of the swing lever 3a2 located on the grinding roller 3 side with respect to the lever rotation shaft 3b2.
  • a hydraulic cylinder can be used as the pressing cylinder 10 in these embodiments.
  • the pressing cylinder 10 is provided with the cylinder portion 13 and the rod portion 11, and is disposed such that the rod portion 11 is disposed on the upper side with the cylinder portion 13 on the lower side.
  • a lever connecting portion 14A is connected to the rod portion 11 on the upper side via a coupling portion 18.
  • the lever connecting portion 14A is rotatably connected to the lower arm of the swing lever 3A via a rod connecting shaft 3C.
  • the lower portion of the lower cylinder portion 13 is provided with a cylinder mounting portion 14B, and is pivotally supported by the base portion of the installation location via the cylinder mounting shaft 10B.
  • a rod-side hydraulic port R1 is formed on the rod portion 11 side of the cylinder portion 13 of the pressing cylinder 10. And, on the side opposite to the rod portion of the cylinder portion 13 of the pressing cylinder 10, an opposite rod side hydraulic port R2 is formed.
  • the rod side hydraulic port R1 is connected to the hydraulic pressure supply line including the hydraulic pump Y, the accumulator ACC, the relief valve ER and the like during the normal operation where the raw material is stably pulverized. It is connected.
  • the non-rod side hydraulic port R2 is connected to the tank T side line as a hydraulic pressure discharge line.
  • the switching valve DCV when lifting the grinding roller 3 in a direction to separate from the rotary table 2, the switching valve DCV is operated, and the opposite rod side hydraulic port R2 is the hydraulic pump Y, the accumulator ACC,
  • the rod-side hydraulic port R1 is connected to the hydraulic pressure supply line configured by the relief valve R and the like, and is connected to the hydraulic pressure discharge line.
  • the annular retainer between the spring 15 and the rod portion 11 is disposed so that a cylindrical retainer 17 with a flange is inserted below, The spring 15 was held against shaking.
  • the length of the spring 15 in the present embodiment is configured to be slightly longer than the protrusion length of the rod portion 11 from the cylinder portion 13 in the normal operation where the crushing behavior is stable. That is, when the vertical crusher 1 crushes the raw material layer of normal thickness between the crush roller 3 and the rotary table 2, the upper end of the spring 15 contacts the coupling portion 18 and is somewhat compressed Configured.
  • the raw material layer may be rapidly thinned during operation, and the upper arm of the swing lever 3A supporting the pulverizing roller 3 may be rapidly moved to the rotary table 2 side to be in close proximity. is there.
  • the swing lever 3A supporting the pulverizing roller 3 is rotated, the lower end arm of the swing lever 3A is moved to the pressing cylinder 10 side accordingly.
  • the lever connecting portion 14A connected to the lower end side arm via the rod connecting shaft 3C also moves to the pressing cylinder 10 side.
  • the spring 15 disposed between the coupling portion 18 and the cylinder portion 13 is It is configured to be strongly compressed.
  • the spring stress (sometimes referred to as a reaction force) to which the spring 15 tends to expand becomes stronger.
  • the grinding roller pressure which is the pressing force to the side, is reduced.
  • the force of pushing back the swing lever 3A by the reaction force of the spring 15 acts in the direction of reducing the crushing roller pressure. Therefore, according to the present embodiment, by changing the length of the spring 15 or the spring constant, etc., the expansion state of the spring 15 can be changed, and the magnitude of the reaction force can be adjusted. It is possible to adjust the
  • the length of the spring 15 is not limited to the present embodiment, and can be changed without departing from the technical concept of the present invention, and in view of the operation situation, for example, a normal operation in which the crushing behavior is stable
  • the projection length of the rod portion 11 from the cylinder portion 13 at the time may be the same or shorter.
  • the pressing cylinder 10 has an adjuster 9 and a spacer 19 disposed on the outer peripheral side of the retainer 17.
  • the adjuster 9 has, for example, an annular appearance, and is screwed to a screw portion 17A formed on the outer peripheral portion of the retainer 17.
  • One surface of the adjuster 9 in the axial direction of the rod portion 11 is in contact with the end of the spring 15 on the cylinder portion 13 side, and the other surface is in contact with the spacer 19.
  • the spacer 19 is disposed between the collar of the retainer 17 and the adjuster 9 to reinforce the adjuster 9 that resists the reaction force of the spring 15.
  • the spiral wound spring 15 is disposed as an elastic body between the cylinder portion 13 and the coupling portion 18.
  • a disc spring or the like may be disposed singly or in plural, or may be disposed as an annular rubber as an elastic body without departing from the technical concept of the present invention. Within range, other elastics can be used.
  • the raw material (coal in this embodiment) input to the raw material supply chute 35 of the vertical crusher 1 is injected near the center of the rotary table 2 via the raw material supply chute 35, and draws a spiral trajectory. , Move to the outer peripheral side of the rotary table 2. Then, the raw material introduced onto the rotary table 2 is combined with the circulating raw material described later on the rotary table 2 and most of the raw material is bitten by the rotary table 2 and the grinding roller 3 and crushed again.
  • the raw material bitten and crushed by the rotary table 2 and the grinding roller 3 passes over the dam ring 2D provided around the outer edge of the rotary table 2, and the gap between the outer periphery of the upper surface 2A of the rotary table and the casing 1A. Head toward an annular passage 30 (sometimes referred to as an annular space 30).
  • the raw material that has reached the annular passage 30 is blown up by the gas and ascends in the casings 1A and 1B to flow in the direction of the classifier 24, but the raw material having a large diameter and a large weight is If it can not reach or can not pass through the classifier 24, it falls as a circulating raw material that circulates in the vertical mill 1 and is repeatedly pulverized.
  • the circulating material is repeatedly supplied onto the rotary table 2 via the inner cone 29 and the like until it reaches a predetermined particle size and discharged to the outside of the machine, and again between the rotary table 2 and the grinding roller 3 It is bitten and crushed.
  • the raw material pulverized to a predetermined particle size is removed from the upper outlet 39 as a pulverized product by reaching and passing through the classifier 24.
  • the distance between the coupling portion 18 and the cylinder portion 13 is shortened and the spring 15 is strongly compressed. Is configured to be strong.
  • the grinding roller pressure is a value obtained by subtracting the reaction force from the spring 15 from the sum of the pressing force by the pressure cylinder 10 and the roller's own weight, so if the grinding roller 3 approaches the rotary table 2, the reaction force from the spring 15 is It becomes stronger and the grinding roller pressure decreases.
  • the reaction force of the spring 15 can be made to act strongly, so the grinding roller is adjusted according to the thickness of the raw material layer.
  • the pressure can be adjusted in real time.
  • the vertical crusher 1 according to the present embodiment even if the thickness of the raw material layer changes rapidly and becomes thin, the crushing roller pressure naturally changes, and therefore no delay due to control occurs.
  • the vertical crusher 1 according to the present embodiment in particular, even in the case where the thickness of the raw material layer is thickened, thinned, or repetitively changed in a short cycle, it is possible to reliably correspond to the change. It is possible to promote stable grinding behavior.
  • the vertical crusher according to the present invention is capable of stable operation as compared with the prior art even when the thickness of the raw material layer becomes extremely thin during operation, and a suitable crusher It can be used as

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

La présente invention concerne un broyeur vertical dans lequel la section tige d'un cylindre de pression et un levier oscillant sont raccordés, et la section tige est déplacée vers le côté section cylindre du cylindre de pression pour mettre en rotation le levier oscillant, ce qui permet de déplacer un rouleau de broyage vers le côté table rotative et de broyer, au moyen du rouleau de broyage, un matériau chargé sur la table rotative. La section tige du cylindre de pression et le levier oscillant sont raccordés par l'intermédiaire d'une section de raccordement, et un ressort enroulé en hélice est disposé entre la section cylindre du cylindre de pression et la section de raccordement de façon à être ajusté sur la section tige. La présente invention permet, sans l'utilisation d'un dispositif de commande complexe et par l'installation du ressort sur le cylindre de pression qui entraîne le levier oscillant, d'empêcher de manière fiable le rouleau de broyage d'approcher rapidement le côté table rotative.
PCT/JP2018/040141 2017-11-16 2018-10-29 Broyeur vertical et procédé de commande de pression de rouleau de broyage pour broyeur vertical Ceased WO2019097998A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019553786A JP7279641B2 (ja) 2017-11-16 2018-10-29 竪型粉砕機、及び、竪型粉砕機の粉砕ローラ圧力制御方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-221036 2017-11-16
JP2017221036 2017-11-16

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Publication Number Publication Date
WO2019097998A1 true WO2019097998A1 (fr) 2019-05-23

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PCT/JP2018/040141 Ceased WO2019097998A1 (fr) 2017-11-16 2018-10-29 Broyeur vertical et procédé de commande de pression de rouleau de broyage pour broyeur vertical

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WO (1) WO2019097998A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4694997A (en) * 1985-12-12 1987-09-22 Fuller Company Apparatus for exerting a downward force on a grinding roller
JP2012520976A (ja) * 2009-03-19 2012-09-10 ロエシェ ゲーエムベーハー ローラミル向けの油圧アレイ
JP2014100681A (ja) * 2012-11-21 2014-06-05 Ihi Corp 竪型ローラミル

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4694997A (en) * 1985-12-12 1987-09-22 Fuller Company Apparatus for exerting a downward force on a grinding roller
JP2012520976A (ja) * 2009-03-19 2012-09-10 ロエシェ ゲーエムベーハー ローラミル向けの油圧アレイ
JP2014100681A (ja) * 2012-11-21 2014-06-05 Ihi Corp 竪型ローラミル

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JPWO2019097998A1 (ja) 2020-11-26
JP7279641B2 (ja) 2023-05-23

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