JP2016150300A - Vertical crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical crusher having a dam ring capable of changing a thickness of a crushing layer on a rotary table to a predetermined thickness, even when a crushing raw material and an operation condition of the vertical crusher are changed.SOLUTION: A vertical crusher comprises a dam ring 50 provided on an outer peripheral edge part of a rotary table 14, and the dam ring 50 is composed of a fixed dam ring 60 installed on the rotary table 14 and a movable dam ring 70 installed on the fixed dam ring 60. An irregular fitting structure is formed between the fixed dam ring 60 and the movable dam ring 70, and a vertical position of the movable dam ring 70 to the fixed dam ring 60 can be adjusted by a position adjustment part 80 for advancing-retreating in the fitting direction of the fitting structure.SELECTED DRAWING: Figure 1

Description

  The present invention mainly relates to a vertical crusher that crushes raw materials such as coal, oil coke, limestone, slag, clinker, cement raw material, chemicals, and biomass into powder with a crushing roller driven on a rotary table.

  A vertical crusher is widely used as a crusher for crushing raw materials such as coal and biomass. A conventional vertical crusher includes a rotary table and a plurality of crushing rollers arranged in a position that equally divides the outer peripheral portion of the upper surface of the rotary table in the circumferential direction in a casing that forms an outer shell of the crusher. .

  In such a vertical crusher, when the pulverized raw material is supplied to the center of the rotary table, the pulverized raw material moves to the outer peripheral portion of the rotary table by the rotation of the rotary table. Since the crushing roller is pressed against the outer peripheral portion and rotated, the crushing raw material enters between the crushing roller and the rotary table and is crushed. And by the hot air blowing from the annular passage between the outer peripheral surface of the rotary table and the inner peripheral surface of the casing, the inside of the casing rises while the granular material is dried together with the hot air. The powder particles are sorted by the classifying means provided in the upper part of the casing, and the product of a predetermined particle size is discharged to the outside. The powder that cannot pass through the classification means falls again on the rotary table and is pulverized.

  When a vertical crusher supplies a pulverized raw material onto a rotary table and pulverizes while pressing with a pulverizing roller, a pulverized layer that becomes a layer of pulverized fine powder is interposed between the rotary table and the pulverizing roller. . One of the roles of the pulverized layer is a buffer function. With the pulverized layer having an appropriate layer thickness, the distance between the pulverizing roller and the rotary table during pulverization is maintained, and normal operation can be performed. When the pulverized layer becomes thin, self-excited vibration is generated in the rotating pulverizing roller, and normal operation cannot be performed. Therefore, in order to perform a normal crushing process, it is necessary to set the crushing layer to an appropriate thickness.

  In the conventional vertical crusher, a dam ring is provided on the outer peripheral edge of the rotary table in order to set the pulverized layer to a predetermined thickness. FIG. 4 is an explanatory view of a dam ring of a conventional vertical crusher. As shown in the figure, the dam ring 1 is an annular member projecting at a predetermined height above the outer peripheral edge of the rotary table 2 in the direction perpendicular to the table upper surface 3. The dam ring 1 having such a configuration can dam the powder that is crushed on the rotary table 2 and moves to the outer periphery by centrifugal force with the table upper surface 3. The pulverized layer 4 on the table upper surface 3 is formed at a predetermined height in proportion to the height of the dam ring 1.

  The above-mentioned pulverized layer 4 has an optimum height depending on various types of raw materials such as the size, hardness and moisture content of the pulverized raw material, the raw material supply amount, product particle size, and pulverization pressure. For this reason, the conventional dam ring 1 is configured such that the height can be adjusted so that the optimum pulverized layer 4 can be formed by various configurations such as Patent Documents 1 to 3.

The vertical crusher disclosed in Patent Document 1 has a dam plate and an elevating means attached to the outer periphery of the dam ring so that the height of the dam ring can be increased even when the crushing roller is rotating without stopping the crusher. Can be adjusted.
The vertical pulverizer disclosed in Patent Document 2 can be provided with an opening lid on a casing, and a dam ring plate can be detachably attached from the opening lid to form a pulverized layer having a predetermined thickness.
The vertical crusher disclosed in Patent Document 3 includes a dam ring in which a plurality of adjustment plates are stacked on the outer peripheral edge of a rotary table and fixed with bolts, and the height of the dam ring is configured to be variable. Yes.

JP-A-5-7786 JP 2010-119924 A Japanese Utility Model Publication No. 4-5236

However, in the structure of the dam plate disclosed in Patent Documents 1 and 2, it is necessary to secure an installation space in the casing, and the number of parts increases and the device configuration becomes complicated.
In addition, the height adjustment of the dam ring disclosed in Patent Document 3 is performed by stopping the pulverizer in operation, removing the bolt, removing the existing adjustment plate, or attaching a new adjustment plate, and then again the bolt. There is a problem that it takes a long time to set.

  In view of the above-mentioned problems of the prior art, the present invention provides a dam ring capable of changing the thickness of the pulverized layer on the rotary table to a predetermined thickness even when the operating conditions of the pulverized raw material and the vertical pulverizer are changed. An object is to provide a vertical crusher provided.

As a first means for solving the above-mentioned problems, the present invention provides a vertical crusher provided with a dam ring on the outer peripheral edge of a rotary table of a vertical grinder, wherein the dam ring is disposed on the rotary table. A fixed dam ring attached to the movable dam ring and a movable dam ring attached on the fixed dam ring, and a concave-convex fitting structure is formed between the fixed dam ring and the movable dam ring. An object of the present invention is to provide a vertical crusher characterized in that the vertical position of the movable dam ring with respect to the fixed dam ring can be adjusted by a position adjusting unit that moves forward and backward in the direction.
With such a configuration, the height of the dam ring can be easily adjusted even when the operating conditions of the pulverized raw material and the pulverizer are changed. In addition, the fixed dam ring and the movable dam ring adopt a concave and convex fitting structure, so that the initial alignment can be easily performed, and thereafter the height adjustment can be easily performed by the position adjustment unit. be able to. In addition, since the upper surface of the fixed dam ring and the lower surface of the movable dam ring are arranged inside the concave and convex fitting structure, the powder inside the casing is mixed between the fixed dam ring and the movable dam ring, and the movable dam ring The risk of hindering the height adjustment can be reduced.

According to the present invention, as a second means for solving the above-described problem, in the first means, the position adjusting portion penetrates in the fitting direction of the fitting structure and is connected to the female screw of the fixed dam ring. The fastening dam ring includes: a fastening bolt that is screwed together; and an elastic body that urges along the longitudinal direction of the fastening bolt, and a storage space for the elastic body is provided inside the fitting structure. It is an object of the present invention to provide a vertical crusher characterized in that the vertical crusher is urged away from the machine.
By adopting such a configuration, there is no need to perform conventional shim stacking or removal work, and height adjustment can be easily performed only by tightening or loosening fastening bolts.
Further, since the elastic body is accommodated in the concave-convex fitting structure, there is no possibility that the powder inside the casing is mixed, and the height adjustment operation can be easily performed.

According to the present invention, as a third means for solving the above-described problem, in the first means, the position adjusting portion is screwed into a female screw hole penetrating in the fitting direction of the movable dam ring, A vertical crusher comprising: a pressing bolt that contacts an upper surface of the fixed dam ring; and a fixing bolt that passes through a through hole of the movable dam ring and is screwed into a female screw hole of the fixed dam ring. It is to provide.
By adopting such a configuration, there is no need to perform a conventional shim stacking or removing operation, and the height can be easily adjusted only by tightening or loosening bolts.
Further, since the bolt is housed inside the concave-convex fitting structure, there is no possibility that the powder inside the casing is mixed, and the height adjustment operation can be easily performed.

According to the present invention as described above, even when the operating conditions of the pulverized raw material and the pulverizer are changed, the height adjusting means can be easily used without carrying an adjustment member such as a shim into or out of the casing. The height of the dam ring can be adjusted. Therefore, the pulverizer stop time associated with the dam ring height adjustment operation can be reduced.
In addition, the fixed dam ring and the movable dam ring can be easily aligned, and foreign matters such as powder mixed between the fixed dam ring and the movable dam ring can be reduced.

It is explanatory drawing of the dam ring of the vertical crusher of this invention. It is a block schematic diagram of a vertical crusher. It is explanatory drawing of the dam ring of the vertical crusher of a modification. It is explanatory drawing of the dam ring of the conventional vertical crusher.

  Embodiments of a vertical crusher of the present invention will be described below in detail with reference to the accompanying drawings.

[Vertical crusher 10]
FIG. 2 is a schematic diagram of the configuration of the vertical crusher. In FIG. 2, the detailed structure of the dam ring of the vertical crusher is omitted. As shown in FIG. 2, the vertical crusher 10 includes a casing 12, a rotating table 14, a plurality of crushing rollers 16 arranged at positions where the outer peripheral portion of the upper surface of the rotating table 14 is equally divided in the circumferential direction, An annular passage 40 formed along the outer periphery of the table 14, classification means 30 provided on the upper part of the casing 12, and a dam ring 50 attached on the outer peripheral edge of the rotary table are the main basic components.

  The crushing roller 16 is connected to the piston rod of the hydraulic cylinder 24 via an upper arm 20 pivotally attached to the lower casing 12B serving as a fulcrum and a lower arm 22 formed integrally with the upper arm 20. . The crushing roller 16 is laterally pressed on the upper surface 14A of the rotary table by the operation of the hydraulic cylinder 24, and rotates by being driven by the rotary table 14 via the crushing raw material.

A classification means 30 is provided above the upper surface 14 </ b> A of the casing 12.
The classifying means 30 includes a rotary shaft 30a, a rotary blade 30b, and a fixed blade 30c. The rotating shaft 30a hangs downward from the upper surface of the casing 12, and is configured to be rotatable by an external drive motor (not shown). A plurality of rotary blades 30b are arranged in a ring shape below the rotary shaft 30a, with the rotary shaft 30a as an axis. Further, a plurality of fixed blades 30c are formed side by side on the outer periphery of the rotary blade 30b. Both the rotary blade 30b and the fixed blade 30c are arranged in parallel with the axis of the rotary shaft 30a in the longitudinal direction, and the hot air rising in the casing 12 is a gap between the blades parallel to the axis of the rotary shaft 30a. Supplied from In the classifying means 30 having such a configuration, the rotary blade 30b rotates together with the rotary shaft 30a, and only the fine powder particles passing through the fixed blade 30c and the rotary blade 30b are discharged from the upper outlet 44.

  A rectifying cone 30e is provided at the lower end of the fixed blade 30c. The rectifying cone 30e is formed in a funnel shape whose diameter decreases from the upper side to the lower side, and captures the granular material that could not pass through the classification means 30 and supplies it to the upper surface 14A of the rotary table from the lower discharge port. It has become.

A raw material charging chute 34 is connected to the rectifying cone 30e. The raw material is charged from the raw material charging port 32 to the rotary table upper surface 14A via the raw material charging chute 34.
The raw material charged from the raw material charging chute 34 moves to the outer periphery of the rotary table upper surface 14A while drawing a spiral trajectory on the rotary table upper surface 14A, and is caught between the rotary table upper surface 14A and the grinding roller 16 and pulverized. The A part of the pulverized granular material passes over the dam ring 50 which is provided around the outer edge of the turntable upper surface 14A to adjust the layer thickness of the raw material, and the outer periphery of the turntable upper surface 14A and the casing 12 It goes to the annular passage 40 which is a gap. Here, a gas introduction port 42 for introducing hot air heated to a predetermined temperature is provided below the turntable 14 of the lower casing 12B.

During operation of the vertical crusher 10, by introducing hot air from the gas inlet 42, the hot air flowing through the classification means 30 from below the rotary table 14 to the upper outlet 44 in the casing 12. Airflow is generated.
The raw material charged into the vertical crusher 10 and part of the powder that has been crushed by the rotary table 14 and the crushing roller 16 and passed over the dam ring 50 described later are blown up by hot air from the annular passage 40. The inside of the casing 12 is raised and reaches the classifying means 30.

Here, the granular material having a large diameter and mass cannot pass through the fixed blade 30c and the rotary blade 30b of the classifying means 30, falls to the rectifying cone 30e, and is re-engaged by the grinding roller 16 to be crushed. The On the other hand, the granular material having a small diameter passes through the classification means 30 through the fixed blades 30b and the rotary blades 30c arranged with a gap therebetween, and is taken out of the casing 12 through the upper outlet 44.
Further, a part of the raw material having a maximum particle size that has reached the annular passage 40 without being caught by the grinding roller 16 falls below the rotary table 14 from the annular passage 40 and is vertically crushed from the lower outlet 46. It is taken out of the machine 10.

[Dam Ring 50]
FIG. 1 is an explanatory view of a dam ring of a vertical crusher of the present invention, (A) is a side view of a rotary table, and (B) is a sectional view of a side surface of the dam ring. As shown in the figure, the dam ring 50 of the vertical crusher includes a fixed dam ring 60 provided on the rotary table 14, a movable dam ring 70 provided on the fixed dam ring 60, and a position adjusting unit 80. It is said.
The fixed dam ring 60 is a cylindrical member that protrudes upward from the outer peripheral edge of the table upper surface 14A of the rotary table 14. The fixed dam ring 60 can be formed by combining annular or arcuate members in an annular shape. The fixed dam ring 60 has a concavo-convex portion that can be fitted to the concavo-convex portion formed on the outer peripheral edge portion of the table upper surface 14A on the lower surface. After fitting the irregularities together, the fixed dam ring 60 can be fixed to the turntable 14 using fastening means.
On the upper surface of the fixed dam ring 60, an uneven portion 62 that can be fitted to an uneven portion 72 of a movable dam ring 70 described later is formed. The uneven portion 62 of the present embodiment can be formed in a convex shape protruding upward from the upper surface of the fixed dam ring 60 or a concave shape recessed downward from the upper surface. The uneven portion 62 shown in FIG. It is formed in a convex shape protruding to A female screw hole 64 is formed on the upper surface of the fixed dam ring 60 and inside the concavo-convex portion 62. A fastening bolt 82 of a position adjusting unit 80 described later is screwed into the female screw hole 64. Further, the concave portion inside the concavo-convex portion 62 of the fixed dam ring 60 constitutes a part of the accommodating space 90 that can accommodate a position adjusting portion 80 described later.

  The movable dam ring 70 is a cylindrical member formed on the fixed dam ring 60. Similar to the fixed dam ring 60, the movable dam ring 70 can be formed by combining annular or arcuate members in an annular shape. The movable dam ring 70 has a concavo-convex portion 72 that can be fitted to the concavo-convex portion 62 of the fixed dam ring 60 on the lower surface. The uneven portion 72 of the present embodiment can be formed in a convex shape protruding downward from the lower surface of the movable dam ring 70 or a concave shape recessed upward from the lower surface, and the uneven portion 72 shown in FIG. It is formed in a concave shape. The movable dam ring 70 is formed with a through-hole 74 penetrating along the concave and convex fitting direction (the height direction of the dam ring 50). A fastening bolt 82 of a position adjusting unit 80 described later passes through the through hole 74. In the through hole 74, first and second recesses 75 and 76 having a diameter larger than the diameter of the through hole 74 are formed on both end surfaces (upper and lower surfaces) at concentric positions. The 1st recessed part 75 is a location where the head of the fastening bolt 82 mentioned later fits. The second recess 76 constitutes a part of the accommodation space 90 that can accommodate a position adjusting unit 80 described later.

The movable dam ring 70 can be mounted on the fixed dam ring 60 by fitting the concavo-convex portion 72 of the movable dam ring 70 having such a configuration to the concavo-convex portion 62 of the fixed dam ring 60. At this time, in the uneven fitting structure of the present embodiment, the fitting direction is the same as the height direction of the dam ring 50. And the length of the fitting direction of the uneven | corrugated | grooved parts 62 and 72 of this embodiment is set so that it may become longer than the optimal range of the height of the dam ring 50. FIG. As a result, even when the height of the dam ring 50 is set to the maximum position, it is possible to maintain the state in which the concave and convex portions 62 and 72 are fitted to each other. For this reason, there is no possibility that foreign matter such as powder enters from the gap without generating a gap between the concave and convex portions 62 and 72.
Further, when the fixed dam ring 60 and the movable dam ring 70 are fitted together, a position adjusting unit described later is an internal space formed by the concave portion of the concave and convex portion 62 of the fixed dam ring 60 and the second concave portion 76 of the movable dam ring 70. There are 80 accommodating spaces 90.

The position adjustment unit 80 has a fastening bolt 82 and an elastic body 84 as the main basic components.
The fastening bolt 82 is a bolt that is inserted downward from the first recess 75 of the movable dam ring 70, penetrates the through hole 74 and the accommodation space 90, and is screwed into the female screw hole 64 of the fixed dam ring 60.
The elastic body 84 is a coiled compression spring that urges along the longitudinal direction of the fastening bolt 80. The elastic body 84 of the embodiment has a fastening bolt 82 passing through the center hole. The elastic body 84 is set to a size that can be accommodated in the accommodating space 90 where the space is minimized when compressed.
When the movable dam ring 70 is attached to the fixed dam ring 60 and tightened with the fastening bolt 82 so that the end faces of the concavo-convex parts 62 and 72 are in contact with each other, the position adjusting unit 80 having such a configuration is Compressed by the upper and lower surfaces of the receiving space, a force that urges along the longitudinal direction of the fastening bolt 82 acts. When the height of the dam ring 50 is increased, by loosening the fastening bolt 82, the elastic body 84 compressed in the accommodation space 90 is extended, and the movable dam ring 70 is pushed upward to push the dam ring 50. Can be easily adjusted. On the other hand, when the dam ring 50 having a predetermined height is desired to be lowered, the first recess 75 of the movable dam ring 70 is pushed downward by the head of the fastening bolt 82 by tightening the fastening bolt 82, and the position of the dam ring 50. Adjustment can be performed easily.
A plurality of such position adjusting portions 80 are attached radially in plan view of the dam ring 50.

  The dam ring 50 having the above-described configuration employs a concave / convex fitting structure formed by the concave / convex portions 62 and 72 of the fixed dam ring 60 and the movable dam ring 70, so that the initial alignment can be easily performed. Thereafter, the height adjustment can be easily performed by the position adjustment unit 80.

[Modification]
FIG. 3 is an explanatory diagram of a dam ring of a vertical crusher according to a modification. As shown in the figure, the dam ring 50A of the vertical crusher of the modified example includes a fixed dam ring 60A provided on the rotary table 14, a movable dam ring 70A provided on the fixed dam ring 60A, and a position adjusting unit 80A. Main basic configuration.
The fixed dam ring 60 </ b> A is a cylindrical member that protrudes upward from the outer peripheral edge of the table upper surface 14 </ b> A of the rotary table 14. The fixed dam ring 60A can be formed by combining annular or arcuate members in an annular shape. As for fixed dam ring 60A, the unevenness | corrugation which can be fitted with the unevenness | corrugation formed on the outer periphery part of table upper surface 14A is formed in the lower surface. After fitting these irregularities together, the fixed dam ring 60A can be fixed to the turntable 14 using fastening means.
On the upper surface of the fixed dam ring 60A, an uneven portion 62A that can be fitted to an uneven portion 72A of a movable dam ring 70A described later is formed. The uneven portion 62A of the present embodiment can be formed in a convex shape protruding upward from the upper surface of the fixed dam ring 60A or a concave shape recessed downward from the upper surface, and the uneven portion 62A shown in FIG. It is formed in a convex shape protruding to A female screw hole 64A is formed inside the concavo-convex portion 62A on the upper surface of the fixed dam ring 60A to which the fixing bolt 86 described later is attached. A fixing bolt 86 described later is screwed into the female screw hole 64A.

  The movable dam ring 70A is a cylindrical member formed on the fixed dam ring 60A. As with the fixed dam ring 60A, the movable dam ring 70A can be formed by combining annular or arcuate members in an annular shape. The movable dam ring 70A has a concave and convex portion 72A that can be engaged with the concave and convex portion 62A of the fixed dam ring 60A on the lower surface. The uneven portion 72A of the present embodiment can be formed in a convex shape protruding downward from the lower surface of the movable dam ring 70A or a concave shape recessed upward from the lower surface, and the uneven portion 62A shown in FIG. It is formed in a concave shape. A female screw hole 77 is formed through the upper surface of a movable dam ring 70A to which a push bolt 85, which will be described later, is screwed, penetrating along a concave / convex fitting direction (longitudinal direction of the dam ring 50A). Further, a through hole 74A penetrating along the fitting direction of the unevenness (longitudinal direction of the dam ring 50A) is formed on the upper surface of the movable dam ring 70A through which the fixing bolt 86 described later passes. A fixing bolt 86 passes through the through hole 74A.

  The movable dam ring 70A can be mounted on the fixed dam ring 60A by fitting the concavo-convex portion 72A of the movable dam ring 70A having such a configuration with the concavo-convex portion 62A of the fixed dam ring 60A. At this time, in the uneven fitting structure of the present embodiment, the fitting direction is the same as the height direction of the dam ring. And the length of the fitting direction of the uneven | corrugated | grooved parts 62A and 72A of this embodiment is set so that it may become longer than the optimal range of the height of the dam ring 50A. Thereby, even when the height of the dam ring 50A is set to the maximum position, the state in which the concave and convex portions 62A and 72A are fitted to each other can be maintained. For this reason, there is no possibility that foreign matters, such as powder, may mix from this crevice, without the crevice between concavo-convex parts 62A and 72A arising.

The position adjusting unit 80A has a push bolt 85 and a fixing bolt 86 as the main basic components.
The push bolt 85 is a bolt that is screwed into the female screw hole 77 of the movable dam ring 70 </ b> A, and the bolt tip protruding from the back surface (lower surface) of the female screw hole 77 comes into contact with the end surface of the concave and convex portion 62 </ b> A of the fixed dam ring 60 </ b> A. The push bolt 85 is set longer than the length of the female screw hole 77.
The fixed bolt 86 is a bolt that passes through the through hole 74A of the movable dam ring 70A and is screwed into the female screw hole 64A of the fixed dam ring 60A.
A plurality of such push bolts 85 and fixing bolts 86 are attached radially in a plan view of the dam ring 50A. At this time, the push bolts 85 and the fixing bolts 86 are preferably attached alternately.
The position adjusting portion 80A having such a configuration is attached so that the concave and convex portions 72A of the movable dam ring 70A are fitted to the concave and convex portions 62A of the fixed dam ring 60A and the end surfaces of the concave and convex portions 62A and 72A are in contact with each other. When the pulverizer is operated in a state where the end surfaces of the concavo-convex portions 62A and 72A are in contact with each other, a temporary fixing bolt (not shown) is inserted or screwed into the female screw hole 77 and the through hole 74A. Further, it is possible to prevent foreign matters such as powder from entering the inside of the female screw hole 77 and the through hole 74A.

When the height of the dam ring 50 is increased, the push bolt 85 is screwed into the female screw hole 77 and tightened until the front end of the bolt comes into contact with the end surface of the uneven portion 62A of the fixed dam ring 60A. The ring 70A is pushed upward, and the position of the dam ring can be easily adjusted. After adjusting the movable ring to a predetermined position, the fixed bolt 86 is passed through the through hole 84A and screwed into the female screw hole 64A of the fixed dam ring 60A, thereby tightening the movable dam ring 70A by the head of the fixed bolt 86. The dam ring 50 can be fixed at the set position by pressing the upper surface downward.
The dam ring 50A having the above-described configuration employs a concavo-convex fitting structure by the concavo-convex portions 62A and 72A of the fixed dam ring 60A and the movable dam ring 70A. After that, height adjustment can be easily performed by the position adjustment unit 80A.
[Action]
The operation of the vertical crusher of the present invention having the above configuration will be described below.

  When the rotary table 14 of the vertical crusher 10 is rotated, the crushing roller 16 laterally pressed by the hydraulic cylinder 24 onto the upper surface 14A of the rotary table is also rotated. Then, when the pulverized raw material is charged from the raw material charging port 32 to the rotary table upper surface 14A, the rotary table upper surface 14A moves to the outer periphery of the table while drawing a spiral trajectory. It is bitten in between and crushed.

The powder that is crushed on the rotary table 14A and moves to the outer periphery by centrifugal force is dammed by the dam ring 50 to form a pulverized layer having a predetermined thickness.
When setting to a pulverized layer with a predetermined layer thickness due to various factors such as the type of raw material such as the size, hardness, moisture content of the pulverized raw material, raw material supply amount, product particle size, pulverization pressure, etc. It is necessary to adjust the height.

  The vertical crusher 10 of the present invention employs a dam ring 50 in which a movable dam ring 70 and a fixed dam ring 60 are combined. When the height of the dam ring 50 is increased, the fastening bolt 82 is loosened, The elastic body 84 compressed in the accommodation space 90 expands, and the movable dam ring 70 is pushed upward, so that the position adjustment of the dam ring 50 can be easily performed. On the other hand, when the dam ring 50 having a predetermined height is desired to be lowered, the first recess 75 of the movable dam ring 70 is pushed downward by the head of the fastening bolt 82 by tightening the fastening bolt 82, and the position of the dam ring 50. Adjustment can be performed easily.

  According to the vertical pulverizer of the present invention, the height of the dam ring can be easily adjusted even when the pulverizing raw material and the operating conditions of the pulverizer are changed. In addition, the fixed dam ring and the movable dam ring adopt a concave and convex fitting structure, so that the initial alignment can be easily performed, and thereafter the height adjustment can be easily performed by the position adjustment unit. be able to. In addition, since the upper surface of the fixed dam ring and the lower surface of the movable dam ring are arranged inside the concave and convex fitting structure, the powder inside the casing is mixed between the fixed dam ring and the movable dam ring, and the movable dam ring The risk of hindering the height adjustment can be reduced.

  INDUSTRIAL APPLICABILITY The present invention is particularly useful for a vertical crusher equipped with a dam ring that crushes raw materials such as coal and biomass with a crushing roller and sets a crushing layer formed on the upper surface of the rotary table to an appropriate thickness.

DESCRIPTION OF SYMBOLS 1 ......... Dam ring, 2 ......... Rotary table, 3 ......... Table upper surface, 4 ...... Crushing layer, 10 ......... Vertical crusher, 12 ......... Case, 12a ......... Partition wall, 12B ......... Lower casing, 14 ......... Rotary table, 14A ......... Rotary table top surface, 16 ......... Crushing roller, 16a ......... Roller shaft, 20 ......... Upper arm, 22 ......... Lower arm, 24... Hydraulic cylinder, 30. 34 ... Raw material charging chute, 40 ... Annular passage, 42 ... Gas inlet, 44 ... Upper outlet, 50, 50A ... Dam ring, 60, 60A ... Fixed dam ring, 62, 62A ......... Uneven portion, 64, 64A ... Female screw hole, 70, 70A ......... Moveable dam ring, 72, 72A ......... Uneven portion, 74, 74A ......... Through hole, 75 ......... First recess, 76 ......... Second recess, 77 ... ... female screw hole, 80, 80A ......... position adjusting part, 82 ... fastening bolt, 84 ... elastic body, 85 ... push bolt, 86 ... fixing bolt, 90 ... accommodation space.

Claims (3)

In the vertical grinder equipped with a dam ring on the outer peripheral edge of the rotary table of the vertical grinder,
The dam ring comprises a fixed dam ring attached on the rotary table and a movable dam ring attached on the fixed dam ring,
An uneven fitting structure is formed between the fixed dam ring and the movable dam ring, and the position of the movable dam ring relative to the fixed dam ring is adjusted by a position adjusting unit that moves forward and backward in the fitting direction of the fitting structure. A vertical crusher characterized by being adjustable. The position adjusting unit is
A fastening bolt that penetrates in the fitting direction of the fitting structure and is screwed into the female screw of the fixed dam ring;
It consists of an elastic body that urges along the longitudinal direction of the fastening bolt,
The vertical crusher according to claim 1, wherein a storage space for the elastic body is provided inside the fitting structure to urge the movable dam ring away from the fixed dam ring. The position adjusting unit is
A push bolt screwed into a female screw hole penetrating in the fitting direction of the movable dam ring and having a tip contacting the upper surface of the fixed dam ring;
2. The vertical crusher according to claim 1, comprising a fixing bolt that passes through a through hole of the movable dam ring and is screwed into a female screw hole of the fixed dam ring.

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