CN114643106B - Manufacturing method of built-in flow guiding mechanism of vertical roller mill - Google Patents
Manufacturing method of built-in flow guiding mechanism of vertical roller mill Download PDFInfo
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- CN114643106B CN114643106B CN202210350907.5A CN202210350907A CN114643106B CN 114643106 B CN114643106 B CN 114643106B CN 202210350907 A CN202210350907 A CN 202210350907A CN 114643106 B CN114643106 B CN 114643106B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 157
- 238000000227 grinding Methods 0.000 claims abstract description 107
- 238000013461 design Methods 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims description 17
- 238000004364 calculation method Methods 0.000 claims description 4
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- 239000000843 powder Substances 0.000 abstract description 16
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- 238000001035 drying Methods 0.000 description 2
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Classifications
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- 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
- B02C15/003—Shape or construction of discs or rings
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- 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
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
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Abstract
The invention discloses a manufacturing method of a built-in diversion mechanism of a vertical roller mill, which is characterized by comprising the following steps: s1), determining the diameter D t of a grinding disc, the diameter D r1 of the large end of a grinding roller, the diameter D r2 of the small end of the grinding roller and the width B r of the grinding roller according to basic data such as the design time of the grinding machine, the grindability of materials and the like and a conventional design method of grinding machine selection; s2), determining the structure of the built-in diversion technology: s3), calculating the structure and position parameters of the material guide plate: s4) manufacturing a guide plate and determining the installation position: s5), manufacturing a guide plate bracket and determining the mounting position: s6) mounting. By adopting the technical scheme, the materials leaving the material guide plate are strongly guided into the inner side of the material baffle plate, and are all sent to the lower part of the grinding roller by the material baffle plate for grinding. In addition, the guide plate also has the function of forcedly discharging the material rolled by the grinding roller out of the grinding disc and entering the air ring, so that the damage effect of fine powder enrichment in the material below the stop ring on the material layer is improved. Compared with the traditional vertical roller mill technology, the average yield is increased by 12.1 percent, and the power consumption of a main machine is reduced by 18.7 percent under the condition of the same height of the stop ring.
Description
Technical Field
The invention belongs to the technical field of vertical roller mill design, and particularly relates to a manufacturing method of a built-in flow guiding mechanism of a vertical roller mill.
Background
The grinding principle of the vertical roller mill is material layer grinding, namely, the grinding of materials is realized by mutually extruding particles, the grinding process has good controllability, and the grinding efficiency is high. The prior structural schematic diagram of the vertical roller mill grinding unit is shown in fig. 5.
The working principle of the existing structure is as follows: the new feed and powder selecting machine feed back is fed into the middle part of the millstone by the feed bin 1 under the action of gravity, the millstone rotates to drive the material to rotate, the material moves from the middle part of the millstone to the edge of the millstone under the action of centrifugal force, when the material moves to the lower part of the milling roller, the milling roller extrudes the material (material layer) under the combined action of the action of force F and the stop ring, the material is milled, the milled material passes over the stop ring under the action of the centrifugal force, leaves the millstone, falls into the air ring under the action of gravity, then is upwards brought into the powder selecting machine at the upper part of the mill by high-speed airflow in the air ring, the qualified finished product is selected by the powder selecting machine, and the unqualified large particles are mixed with the new feed by the feed bin and ground back until the milled finished product with the qualified granularity requirement is obtained.
The vertical roller mill integrates grinding, drying and powder selecting, has compact structure, simple system and high drying capacity, has strong adaptability to materials, is widely applied to grinding of cement raw materials, clinker, industrial solid waste, metallurgical slag and other materials, but has the greatest common problem that the controllability of a material layer is poor compared with a roller press which is grinding a material layer, and the only means for controlling the material layer is the adjustment of the height of a millstone stop collar. The material blocking height is increased, the controllability of the material layer is improved, but the grinding efficiency is reduced; the material blocking height is reduced, the grinding efficiency is increased, but the material layer is thinned, the controllability is reduced, and the vibration of the mill is increased; for the equipment of the material layer grinding principle, the material layer controllability directly influences the stability and grinding efficiency of the mill, so that the same materials are ground under the general condition, and the power consumption of a main machine of the vertical roller mill is about 0.5-1 kWh/t higher than that of a roller press.
According to dynamic calculation result analysis of discrete element simulation of the material movement of the vertical roller mill millstone, the material on the millstone can be divided into A, B, C three areas: the materials in the area A can all enter the lower parts of the grinding rollers and can be rolled, the materials in the area B are materials which are directly thrown out by the grinding disc through a gap between the two grinding rollers and are not rolled by the grinding rollers (namely bypass materials), and the materials rolled by the grinding rollers are in the area C. Because the area A and the area B are materials which are not rolled by the grinding rollers, the area B is not theoretically needed to exist from the angles of improving the grinding efficiency and the stability of the grinding machine, namely, the materials which are not rolled are hoped to enter the lower part of the grinding rollers to be rolled so as to generate more fine powder, but in practice, the larger the grinding machine is, the larger the distance between two adjacent grinding rollers is, the larger the area B is, and the higher the rotating speed of the grinding disc is, and the larger the area B is. Generally, as the equipment specification is enlarged, the system yield is higher, the system power consumption is lower, but the vertical roller mill is developed to a scale of 500-600 t/h from 50-60 t/h at the station, and the main reason that the mill efficiency is not obviously improved is that the bypass amount of the zone B is increased to increase the invalid circulation amount in the mill, so that the contribution of the mill enlargement to the mill efficiency is counteracted.
The material in the C area is crushed by the grinding roller, a large amount of fine powder is mixed in the material layer, and the fine powder in the material in the C area is theoretically required to be completely discharged from the view point of improving the grinding efficiency of the material layer, but due to the existence of the baffle ring of the grinding disc, most of fine powder mixed in the material layer below the height of the baffle ring is remained at the bottom of the grinding area except for discharging part of fine powder through rotation and extrusion of the grinding roller, and the content of the fine powder less than or equal to 80 mu m in the material in the C area reaches 18-20 percent according to industrial production statistical data. A large amount of fine powder remains at the bottom of the millstone, the fluidity of the material layer is increased, so that the stability of the material layer is damaged, on one hand, the vibration of the mill is caused, on the other hand, the grinding efficiency is reduced, the current of the mill is reduced, the time of the mill is reduced, the power consumption is increased, and meanwhile, the grain composition of a finished product of the mill is narrowed due to the increase of the circulating load in the mill, so that the quality and the performance of the finished product are influenced.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a manufacturing method of a built-in diversion mechanism of a vertical roller mill, which is used for improving the damage effect of fine powder enrichment in materials below a stop ring on a material layer.
The invention is realized in this way, a manufacturing method of the built-in diversion mechanism of the vertical roller mill is characterized by comprising the following steps:
S1), determining the diameter D t of a grinding disc, the diameter D r1 of the large end of a grinding roller, the diameter D r2 of the small end of the grinding roller and the width B r of the grinding roller according to basic data such as the design time of the grinding machine, the grindability of materials and the like and a conventional design method of grinding machine selection;
S2), determining the structure of the built-in diversion mechanism: the built-in guide mechanism comprises a support main beam, one end of the support main beam is fixedly connected with a central blanking pipe, the other end of the support main beam is provided with a guide plate base, the outer side of the guide plate base is provided with a guide plate, and a support auxiliary beam is connected between the guide plate base and the support main beam; a bracket side lacing wire and/or a bracket upper lacing wire are welded between the bracket main beam and the central blanking pipe at the side close to the central blanking pipe;
s3), calculating the structure and position parameters of the material guide plate:
Main structural position parameters of the guide plate: the height H 2 of the material guide plate, the total length L 3、L4 of the material guide plate, the curvature radius of the arc section of the material guide plate, the distance d 5 between the front end of the material guide plate and the axis of the grinding roller, the gap d 6 between the arc section of the material guide plate and the small end of the grinding roller, the gap d 7 between the plane of the material guide plate and the plane of the small end of the grinding roller, the inclination angle t of the material guide plate, the height H 5 of the material guide plate and the lining plate, the height H 1 of the baffle ring, the included angle phi 1 between the material guide plate and the main support beam, the included angle phi 2 between the auxiliary support beam and the main support beam, the included angle phi 3 between the side lacing wire and the main support beam, and the included angle phi 4 between the upper support lacing wire and the main support beam. The calculation method or the value of each parameter is as follows:
H2＝200～350mm
L3＝(30～35)π(Dt-2Br)/360
d5＝(0.1～0.2)Dr2
d6＝10～20mm
R2＝0.5Dr2-d6
d7＝10～20mm
h1＝(0.02～0.04)(Dr1+Dr2)
h5＝h1±10
t=90±15°, based on the principle that the stock guide is parallel to the plane of the inner end of the grinding roll.
φ1＝65±10°
φ2＝35±5°
φ3＝20±5°
φ4＝30±5°
S4) manufacturing a guide plate and determining the installation position:
Discharging according to the technological structural parameter H 2、R2、L3、L4 of the material guide plate obtained by S2), wherein the material of the material guide plate adopts a double-sided wear-resistant structure, and the backing degree of the material guide plate is 12, 10 and 8mm; the single-sided thickness of the corresponding wear-resistant layer is 6mm, 4mm or 3mm, and the surface hardness HRC is more than or equal to 50; the welding part of the material guide plate and the material guide plate base is not overlaid with a wear-resistant layer, so that the material guide plate and the material guide plate base are firmly welded, and the inclination angle t of the material guide plate is parallel to the inner end surface of the grinding roller when the grinding roller is pressed to the grinding disc theoretical design position; center distance of guide plate positioning bolt holes= (0.5±0.05) (L 3-L4);
s5) manufacturing a guide plate bracket and determining the mounting position:
According to the design and positioning of the material guide plate, the sizes of the main support beam, the auxiliary support beam, the upper support lacing wire and the side support lacing wire are measured on site; the included angle phi 1 = 65 plus or minus 10 degrees between the main support beam and the guide plate, the included angle phi 2 = 35 plus or minus 5 degrees between the main support beam and the auxiliary support beam, the included angle phi 4 = 30 plus or minus 5 degrees between the main support beam and the upper support lacing wire, and the included angle phi 3 = 20 plus or minus 5 degrees between the main support beam and the side pull gateway; center distance (0.5+/-0.05) of positioning bolt holes of the material guide plate base (L 3-L4); the length of the pull-up gateway is estimated by 0.5 to 0.6 times of the length of the main beam and the included angle phi 4 between the main beam and the pull-up gateway; the included angle phi 3 between the bracket side lacing wire and the bracket main beam is determined on site by taking the principle that adjacent bracket side lacing wires do not interfere;
S6) installation:
Temporarily positioning the manufactured guide plate above the millstone according to the designed position, propping the support main beam and the support auxiliary beam below the guide plate base, adjusting the other end of the support main beam to lean against the central blanking pipe of the mill, spot-welding to position the main beam, spot-welding the support upper lacing wire and the support side lacing wire to position the central blanking pipe and the main beam respectively, and then welding firmly respectively; and spot welding the supporting positions of the material guide plate base, the bracket main beam and the bracket auxiliary beam, on-site drilling positioning bolt holes for processing the material guide plate base, the bracket main beam and the bracket auxiliary beam, and then fixing by bolts and nuts to finish the installation.
The invention has the advantages and technical effects that: the built-in flow guiding mechanism manufactured by adopting the technical scheme is used for guiding the materials leaving the material guiding plate into the inner side of the material blocking plate strongly and sending all the materials to the lower part of the grinding roller by the material blocking plate for grinding. In addition, the guide plate also has the function of forcedly discharging the material rolled by the grinding roller out of the grinding disc and entering the air ring, so that the damage effect of fine powder enrichment in the material below the sweeping ring on the material layer is improved, the average yield is increased by 12.1% and the power consumption of a main machine is reduced by 18.7% compared with the traditional vertical roller grinding technology under the same height of the stop ring.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a partial installation structure of the built-in diversion mechanism in FIG. 1;
FIG. 3 is a schematic view of the position structure of the built-in guide mechanism and the grinding roller;
FIG. 4 is a schematic view of process parameters of the structural position of the guide plate;
fig. 5 is a schematic diagram of the structure of a conventional vertical roller mill grinding unit.
In the figure, 1, a bracket main beam; 2. a central blanking pipe; 3. a guide plate base; 4. a material guide plate; 4-1, a wear-resistant layer; 5. a support auxiliary beam; 6. a bracket side lacing wire; 7. lacing wires are arranged on the bracket; 8. and a bracket, 9, and a baffle plate.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, a method for manufacturing a built-in diversion mechanism of a vertical roller mill is characterized by comprising the following steps:
S1), determining the diameter D t of a grinding disc, the diameter D r1 of the large end of a grinding roller, the diameter D r2 of the small end of the grinding roller and the width B r of the grinding roller according to basic data such as the design time of the grinding machine, the grindability of materials and the like and a conventional design method of grinding machine selection;
S2), determining the structure of the built-in diversion mechanism: the built-in guide mechanism is positioned between two grinding rolls and is fixedly connected with the central blanking pipe 2, the built-in guide mechanism comprises a support girder 1, one end of the support girder is fixedly connected with the central blanking pipe 2, the other end of the support girder is provided with a guide plate base 3, the outer side of the guide plate base is provided with a guide plate 4, the guide plate 4 is parallel to the inner end face of the grinding rolls, and the arc section is parallel to the outer circle outline of the inner end face of the grinding rolls; the material guide plate base 3 and the bracket main beams 1 are used for determining the design and installation positions according to the positions of the material guide plates; a bracket auxiliary beam 5 is connected between the guide plate base and the bracket main beam; a bracket side lacing wire 6 and/or a bracket upper lacing wire 7 are welded between the bracket main beam and the central blanking pipe at the side close to the central blanking pipe, so that the connection strength of the bracket main beam is improved; wear-resistant layers 4-1 are arranged on the two sides of the material guide plate, so that the service life is prolonged, and the maintenance frequency is reduced.
S3), calculating the structure and position parameters of the material guide plate:
Main structural position parameters of the guide plate: the height H 2 of the material guide plate, the total length L 3 of the material guide plate, the length L 4 of the arc section of the material guide plate, the curvature radius R 2 of the arc section of the material guide plate, the distance d 5 of the front end of the material guide plate from the axis of the grinding roller, the gap d 6 of the arc section of the material guide plate from the small end of the grinding roller, the gap d 7 of the plane of the material guide plate from the plane of the small end of the grinding roller, the inclination angle t of the material guide plate, the height H 5 of the material guide plate from the lining plate, the height H 1 of the material stop ring, the included angle phi 1 of the material guide plate and the bracket main beam, the included angle phi 2 of the bracket auxiliary beam and the bracket main beam, the included angle phi 3 of the bracket side lacing wire and the bracket main beam included angle phi 4 of the bracket upper lacing wire and the bracket main beam. The calculation method or the value of each parameter is as follows:
H2＝200～350mm
L3＝(30～35)π(Dt-2Br)/360
d5＝(0.1～0.2)Dr2
d6＝10～20mm
R2＝0.5Dr2-d6
d7＝10～20mm
h1＝(0.02～0.04)(Dr1+Dr2)
h5＝h1±10
t＝90±15°
φ1＝65±10°
φ2＝35±5°
φ3＝20±5°
φ4＝30±5°
Preferably, the included angle between the main support beam and the auxiliary support beam is 35+/-5 degrees, so that the material guide plate 4 is ensured to be a surface support, and the reliability of the support is improved.
Preferably, the included angle between the support girder and the support side lacing wire is 20+/-5 degrees, firstly, the dead weight of the support side lacing wire is reduced, and secondly, the adjacent support girder side lacing wire is prevented from being overlapped on the central blanking pipe 2 in a crossing mode.
Preferably, the included angle between the main beam of the bracket and the upper lacing wire of the bracket is 30+/-5 degrees, so that the upper lacing wire is prevented from being eroded and worn by air flow of the air ring.
S4) manufacturing a guide plate and determining the installation position:
Discharging according to the technological structural parameter H 2、R2、L3、L4 of the material guide plate obtained by S2), wherein the material of the material guide plate adopts a double-sided wear-resistant structure, and the backing degree of the material guide plate is 12, 10 and 8mm; the single-sided thickness of the corresponding wear-resistant layer is 6mm, 4mm or 3mm, and the surface hardness HRC is more than or equal to 50; the welding part of the material guide plate and the material guide plate base is not overlaid with a wear-resistant layer, so that the material guide plate and the material guide plate base are firmly welded, and the inclination angle t of the material guide plate is parallel to the inner end surface of the grinding roller when the grinding roller is pressed to the grinding disc theoretical design position; center distance of guide plate positioning bolt holes= (0.5±0.05) (L 3-L4);
s5) manufacturing a guide plate bracket and determining the mounting position:
According to the design and positioning of the material guide plate, the sizes of the main bracket beam 1, the auxiliary bracket beam 5, the upper bracket lacing wire 7 and the side bracket lacing wire 6 are measured on site; the included angle phi 1 =65±10° between the support main beam 1 and the guide plate 4, the included angle phi 2 =35±5° between the support main beam 1 and the support auxiliary beam 5, the included angle phi 4 =30±5° between the support main beam 1 and the support upper lacing wire 7, and the included angle phi 3 =20±5° between the support main beam 1 and the support side pull gateway; the center distance (0.5+/-0.05) between the positioning bolt holes of the guide plate base 3 (L 3-L4); the length of the bracket pull-up gateway is estimated by 0.5 to 0.6 times of the length of the main beam and the included angle between the main beam and the bracket pull-up gateway; the included angle phi 3 between the bracket side lacing wire 6 and the bracket main beam 1 is determined on site by taking the principle that adjacent bracket side lacing wires do not interfere; the materials of each beam and each pull gateway are recommended to select 10# or 12# hot rolled light channel steel; and blanking the upper lacing wire of the bracket and the side lacing wire of the bracket, and performing site positioning welding.
S6) installation:
Temporarily positioning the manufactured guide plate above the millstone according to the designed position, propping the support main beam and the support auxiliary beam below the guide plate base, adjusting the other end of the support main beam to lean against the central blanking pipe of the mill, spot-welding to position the main beam, spot-welding the support upper lacing wire and the support side lacing wire to position the central blanking pipe and the main beam respectively, and then welding firmly respectively; and spot welding the supporting positions of the material guide plate base, the bracket main beam and the bracket auxiliary beam, on-site drilling positioning bolt holes for processing the material guide plate base, the bracket main beam and the bracket auxiliary beam, and then fixing by bolts and nuts to finish the installation.
The technical scheme is applied to the vertical grinding roller with the baffle plate to form an outer baffle inner guide structure; the material blocking plate scheme is mainly used for controlling materials extruded by the grinding roller, and the material blocking plate is specifically structured that the grinding roller material blocking assembly comprises a material blocking plate and a bracket assembly, wherein the material blocking plate is a V-shaped material blocking plate inclined towards the center of the grinding roller, the side close to the grinding roller is a reflecting plate, and the side far away from the grinding roller is an intercepting plate; although the length of the interception plate is lengthened, a part of materials which are not rolled by the grinding roller and are directly thrown out by the grinding disc can be blocked, the extension of the interception plate can influence the discharge of the materials after the grinding roller rolls, and particularly the discharge of fine powder. Therefore, according to the TRIZ innovation theory, the length of the interception plate is same as that of the bypass material and the discharged rolled material, so that physical conflict is formed. In order to solve the physical conflict, solving through TRIZ innovative theory, a 'separation' scheme is obtained, namely, the length of the interception plate is divided into two parts, one part is still in the current position, and the other part is moved to the material guide plate 4 at the inner side of the grinding roller shown in fig. 1. The material guide plate is matched with the outside baffle plate internally and externally to divide the grinding disc into two areas, namely a feeding area and a discharging area. The feeding area completely seals the material which is not rolled and is directly bypassed; the discharging area realizes smooth discharging of the rolled materials by shortening the length of the interception plate and reducing the stop ring. Industrial test data for the out-shift internal pilot scheme are shown in Table 1.
TABLE 1 TRM53.4 raw mill outer gear inner guide movement control scheme Industrial test data
According to industrial test data of a material motion control scheme of an outer baffle inner grinding disc of a raw material mill in a table 1TRM53.4, compared with a traditional vertical roller mill technology before application, the outer baffle inner guide scheme is adopted, the vibration value of the mill is still reduced by 1.4mm/s under the condition that the height of a stop ring is reduced by 35.7%, the average yield is increased by 12.1%, and the power consumption of a main machine is reduced by 18.7%, so that the technical effects of improving the stability of the mill and improving the grinding efficiency of the scheme are proved.
The material motion control implementation process is as follows: the material drops to the mill under the action of gravity from center unloading pipe to follow the mill and rotate together, receive centrifugal force and blanking impact dispersion effect from mill center to mill edge motion, wait to move to the stock guide department and change the direction along the stock guide and move to the stock guide front end and get into the feeding district under the drive of rotatory mill, then follow the mill and do approximate spiral motion, wait to move to the stock stop end, move to the grinding roller below along the stock stop, and forced the conveying by stock stop front end V type reflecting plate to the grinding roller big end grinding district and grind. Because the front end of the material guide plate and the tail end of the material baffle plate are basically in the same radial direction, and the material leaving the material guide plate performs approximate spiral motion, all the uncrushed material is sent by the material baffle plate to the lower part of the grinding roller to be crushed. In addition, the guide plate also has the function of forcedly discharging the material rolled by the grinding roller out of the grinding disc and entering the air ring, so that the damage effect of fine powder enrichment in the material below the stop ring on the material layer is improved, and compared with the traditional vertical roller grinding technology, the average yield is increased by 12.1% and the power consumption of a main machine is reduced by 18.7% under the same height of the stop ring according to certain TRM53.4 raw material grinding industrial test data of Tianjin institute.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (1)
1. The manufacturing method of the built-in diversion mechanism of the vertical roller mill is characterized by comprising the following steps:
S1), determining the diameter of the millstone according to the design time of the mill and the material grindability basic data and the mill selection conventional design method Large end diameter of grinding rollerSmall end diameter of grinding rollerWidth of grinding roller；
S2), determining the structure of the built-in diversion mechanism: the built-in guide mechanism comprises a support main beam, one end of the support main beam is fixedly connected with a central blanking pipe, the other end of the support main beam is provided with a guide plate base, the outer side of the guide plate base is provided with a guide plate, and a support auxiliary beam is connected between the guide plate base and the support main beam; a bracket side lacing wire and/or a bracket upper lacing wire are welded between the bracket main beam and the central blanking pipe at the side close to the central blanking pipe;
s3), calculating the structure and position parameters of the material guide plate:
main structural position parameters of the guide plate: height of guide plate Total length of stock guideArc length of stock guideRadius of curvature of arc section of stock guideThe front end of the material guiding plate is away from the axis of the grinding rollerGap between arc section of stock guide and small end of grinding rollerGap between guide plate plane and plane where small end of grinding roller isInclination angle of material guiding plateHeight of stock guide from lining boardHeight of stop ringIncluded angle between guide plate and main beam of supportIncluded angle between auxiliary beam and main beamIncluded angle between bracket side tie bar and bracket main beamIncluded angle between tie bar on bracket and main beam of bracket；
The calculation method or the value of each parameter is as follows:
s4) manufacturing a guide plate and determining the installation position:
According to S3) the technological structural parameters of the material guide plate 、、、Discharging, wherein the material of the material guide plate adopts a double-sided wear-resistant structure, and the thickness of the material guide plate base material is 12, 10 and 8mm; the single-sided thickness of the corresponding wear-resistant layer is 6mm, 4mm or 3mm, and the surface hardness HRC is more than or equal to 50; the wear-resistant layer is not deposited on the welding part of the material guiding plate and the material guiding plate base, so that the firm welding of the material guiding plate and the material guiding plate base is ensured, and the inclination angle of the material guiding plate is ensuredWhen the grinding roller is pressed to the grinding disc theoretical design position, the grinding roller is parallel to the inner end surface of the grinding roller; center distance of guide plate positioning bolt holes =；
S5) manufacturing a guide plate bracket and determining the mounting position:
According to the design and positioning of the material guide plate, the sizes of the main support beam, the auxiliary support beam, the upper support lacing wire and the side support lacing wire are measured on site; included angle between main beam of bracket and material guiding plate Included angle between main beam and auxiliary beamIncluded angle between main beam of support and lacing wire on supportIncluded angle between main beam of bracket and side pull gateway of bracket; Center distance of positioning bolt holes of guide plate base; The length of the pull-up gateway is 0.5 to 0.6 times of the length of the main beam and the included angle between the main beam and the pull-up gatewayEstimating; included angle between bracket side tie bar and bracket main beamThe method comprises the following steps of determining on site by taking the principle that tie bars at the sides of adjacent brackets do not interfere;
s6) installation:
Temporarily positioning the manufactured guide plate above the millstone according to the designed position, propping the support main beam and the support auxiliary beam below the guide plate base, adjusting the other end of the support main beam to lean against the central blanking pipe of the mill, spot-welding to position the main beam, spot-welding the support upper lacing wire and the support side lacing wire to position the central blanking pipe and the main beam respectively, and then welding firmly respectively; and spot welding the supporting positions of the material guide plate base, the bracket main beam and the bracket auxiliary beam, on-site drilling positioning bolt holes for processing the material guide plate base, the bracket main beam and the bracket auxiliary beam, and then fixing by bolts and nuts to finish the installation.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397806A (en) * | 2011-10-13 | 2012-04-04 | 郝志刚 | Material dispersing device for vertical grinder |
| CN102784694A (en) * | 2012-08-16 | 2012-11-21 | 郝志刚 | Vertical mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103537338A (en) * | 2013-10-12 | 2014-01-29 | 张少明 | Vertical mill |
| JP6172577B2 (en) * | 2014-03-12 | 2017-08-02 | 宇部興産機械株式会社 | Vertical crusher |
| JP2016087544A (en) * | 2014-11-04 | 2016-05-23 | 株式会社Ihi | Vertical roller mill |
| CN207887253U (en) * | 2017-12-22 | 2018-09-21 | 焦作千业水泥有限责任公司 | A kind of vertical pulverizer is with selecting powder material return mechanism |
| BR102018009587A2 (en) * | 2018-05-11 | 2019-11-26 | Metso Brasil Industria E Comércio Ltda. | FEEDING BODY FEEDING SYSTEM IN VERTICAL MILLS |
| CN210303816U (en) * | 2019-04-16 | 2020-04-14 | 江苏瑞祥磁业有限公司 | Special equipment for producing ferrite permanent magnet element |
| CN113457793B (en) * | 2021-07-20 | 2022-05-17 | 天津水泥工业设计研究院有限公司 | Design method of vertical mill grinding structure with different grinding areas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397806A (en) * | 2011-10-13 | 2012-04-04 | 郝志刚 | Material dispersing device for vertical grinder |
| CN102784694A (en) * | 2012-08-16 | 2012-11-21 | 郝志刚 | Vertical mill |
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