CN111921633B

CN111921633B - Raymond mill with adjustable milling pressure

Info

Publication number: CN111921633B
Application number: CN202010646040.9A
Authority: CN
Inventors: 王永涛
Original assignee: Hezhou Xinrifeng Powder Co ltd
Current assignee: Hezhou xinrifeng powder Co.,Ltd.
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-12-07
Anticipated expiration: 2040-07-07
Also published as: CN111921633A

Abstract

The invention relates to the technical field of mechanical milling equipment, and discloses a Raymond milling machine with adjustable milling pressure. Through the setting of plum blossom frame, make at raymond mill during operation, the electro-magnet circular telegram, overcome the pulling force of spring, extrude both sides permanent magnet to the outside, do broken power through the repulsion thrust of electro-magnet and permanent magnet, make grinding roller pressure not only rely on the centrifugal force of grinding roller assembly, and can be through the electric current of adjusting the electro-magnet, change the size of repulsion force, realize the automatically regulated of grinding pressure, the spring can carry out the shock attenuation for the grinding roller simultaneously, prevent that the grinding roller from taking place violent striking with the grinding ring under the centrifugal force effect when the machine starts, cause the grinding roller, the grinding ring damage, and electro-magnet and permanent magnet can adsorb the iron fillings that the during operation wearing and tearing produced, avoid it to produce in the iron fillings gets into the finished product because of wearing and tearing, cause the influence to finished product quality.

Description

Raymond mill with adjustable milling pressure

Technical Field

The invention relates to the technical field of mechanical milling equipment, in particular to a Raymond milling machine with adjustable milling pressure.

Background

The Raymond mill is widely applied to the high-fine powder processing of 280 various materials in industries such as barite, calcite, potash feldspar, talcum, cement, phosphate rock, gypsum, glass, heat-insulating materials and the like, wherein the Mohs hardness of the materials is not more than 9.3 grade, and the humidity of the materials is below 6%, such as non-flammable and non-explosive mineral products, chemical engineering, buildings and the like, and the working principle is as follows: the material to be crushed is added into the machine from a feed hopper on the side of the machine shell, revolves around a vertical axis by means of a grinding roller device hung on a plum blossom frame of a main machine, and simultaneously rotates, the grinding roller swings outwards under the action of centrifugal force during rotation and is tightly pressed on a grinding ring, so that a scraper knife shovels the material and sends the material to a position between the grinding roller and the grinding ring, the purpose of crushing the material is achieved due to rolling and rolling of the grinding roller, after the material is ground, a fan blows air into the main machine shell, powder is blown up, the material with over-coarse fineness is separated by an analyzer arranged above a grinding chamber, the material with over-coarse fineness falls into the grinding chamber for re-grinding, the material with the fineness meeting the specification enters a cyclone collector along with the air flow, and is discharged through a powder outlet after being collected, and the finished product is obtained.

However, the existing Raymond mill has the following problems in the actual use process:

1. the traditional Raymond mill utilizes centrifugal force to enable a grinding roller to roll materials, the grinding pressure is completely controlled by the centrifugal force, when materials with large hardness gradient (such as gypsum, barite and the like) face, the grinding pressure is difficult to adapt to the grinding requirements of all materials, the grinding roller is easy to violently collide with a grinding ring under the action of the centrifugal force when a machine is started, the grinding roller and the grinding ring are damaged, the grinding roller, the grinding ring and a scraper are used as easily-damaged parts and are easy to wear, the grinding roller, the grinding ring and the scraper are usually required to be replaced after working for 500 hours, and scrap iron generated by wear can be mixed into finished products, so that the quality of the finished products is polluted.

2. Because the rotation such as fan, grinding roller and grinding roller support leads to the gas-solid two-phase flow that rises to be rotary motion, makes the solid phase material that is smashed receive centrifugal action, and the particulate matter upwards moves along equipment inner wall spiral, leads to the following two kinds of condition to appear at the during operation of raymond mill: one, the gravity that the large granule thing that selects separately through the analyzer receives is big enough, free fall in-process has very most material can't fall under the influence of wind-force and grinds in the clearance of grinding ring and grinding roller again, so it is serious to lead to the grinding roller empty to grind the phenomenon, the vibration is big, and output is low, and its two, the gravity that the large granule thing that selects separately through the analyzer receives is big enough, fall back along the section of thick bamboo wall and smash the zone time and gather together with the qualified powder that rises, constitute bigger granule, fall back and grind the room, cause material repeated crushing, the crushing efficiency has been reduced.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the Raymond mill with adjustable milling pressure, which has the advantages of being suitable for the requirements of milling grains with different hardness and low iron increment rate in finished products, and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a crocus pressure adjustable raymond mill, includes the casing, the middle part fixed mounting of casing one side has the feed inlet, the middle part fixed mounting of casing upper end has the analyzer, the bottom fixed mounting of analyzer has the analyzer blade, the bottom fixedly connected with air inlet spiral case of casing, the inboard of air inlet spiral case is provided with the grinding ring, the bottom fixedly connected with chassis of air inlet spiral case, the output shaft has been cup jointed in the middle part activity on chassis, the upper end fixedly connected with plum blossom frame of output shaft, the blade disc is scraped to the outside fixedly connected with at plum blossom frame bottom middle part, and the equal fixed mounting in both ends of plum blossom frame has the grinding roller, the inner wall of casing is provided with interior casing, the middle part fixedly connected with inducer of analyzer bottom.

Preferably, the plum blossom frame includes the frame, the middle part fixed mounting of frame has the electro-magnet, the support has been cup jointed in the both sides activity of frame, two the equal fixed mounting in inside of support has the permanent magnet, fixedly connected with spring between permanent magnet and the electro-magnet, the permanent magnet opposite face magnetic pole of electro-magnet both sides installation is the same.

Preferably, the inner shell is located right above the grinding ring and is fixedly connected with the shell through a circular strut.

Preferably, the outer side of the guide wheel is provided with a plurality of groups of spiral grooves, and the height of the guide wheel is greater than that of the opening at the upper end of the inner shell.

Preferably, the frame and the bracket are made of magnetic conductive materials.

The invention has the following beneficial effects:

1. through the arrangement of the plum blossom frame, when the Raymond mill works, the output shaft rotates, the electromagnet is electrified to overcome the tension of the spring, the permanent magnets on two sides are extruded outwards, the repelling thrust of the electromagnet and the permanent magnets is used as crushing power, the condition that the pressure of the grinding roller only depends on the centrifugal force of a grinding roller assembly is avoided, the magnitude of the repelling force can be changed by adjusting the current of the electromagnet, the automatic adjustment of the grinding pressure is realized, meanwhile, the spring can absorb the shock of the grinding roller, the grinding roller is prevented from being violently impacted with a grinding ring under the action of the centrifugal force when the machine is started, the grinding roller and the grinding ring are damaged, the electromagnet and the permanent magnets can generate magnetism to magnetize a frame and a support, the generated magnetism can adsorb iron filings and the like generated by the abrasion of the grinding roller, the grinding ring, a scraper and the like in the Raymond mill during working, and the iron filings are prevented from entering finished products due to the abrasion, the quality of the finished product is affected.

2. Through the setting of inducer and interior casing, make the top screen the remaining big particulate matter after the analysis ware to dispersion all around under the whirlwind centrifugation of inducer and analysis ware itself, get into gap between interior casing and the casing, and directly fall into from interior casing bottom opening and grind the ring, between the grinding roller, the regrinding of the big particulate matter of being convenient for, not only solved the large granule powder and be difficult to the whereabouts and cause the grinding roller, grind the problem that the ring grinds, and with the powder contact that rises when avoiding the big particulate matter whereabouts, it grinds again to become the large granule thing, the repeated crushing problem of powder has been solved, the crushing efficiency has been improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure A of the present invention;

FIG. 3 is a schematic view of a guide wheel according to the present invention;

fig. 4 is a schematic diagram of a conventional structure.

In the figure: 1. a housing; 2. a feed inlet; 3. an inner housing; 4. an analyzer; 5. an analyzer blade; 6. a guide wheel; 7. an air inlet volute; 8. grinding a ring; 9. a chassis; 10. an output shaft; 11. a plum blossom frame; 1101. a frame; 1102. an electromagnet; 1103. a support; 1104. a permanent magnet; 1105. a spring; 12. a scraper disc; 13. and (4) grinding the roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a raymond mill with adjustable milling pressure comprises a shell 1, a feed inlet 2 is fixedly installed in the middle of one side of the shell 1, an analyzer 4 is fixedly installed in the middle of the upper end of the shell 1, an analyzer blade 5 is fixedly installed at the bottom of the analyzer 4, an air inlet volute 7 is fixedly connected to the bottom of the shell 1, a grinding ring 8 is arranged on the inner side of the air inlet volute 7, a chassis 9 is fixedly connected to the bottom of the air inlet volute 7, an output shaft 10 is movably sleeved on the middle of the chassis 9, a plum blossom frame 11 is fixedly connected to the upper end of the output shaft 10, a scraper disc 12 is fixedly connected to the outer side of the middle of the bottom end of the plum blossom frame 11, grinding rollers 13 are fixedly installed at two ends of the plum blossom frame 11, an inner shell 3 is arranged on the inner wall of the shell 1, and a guide wheel 6 is fixedly connected to the middle of the bottom end of the analyzer 4.

Wherein, the plum blossom frame 11 comprises a frame 1101, an electromagnet 1102 is fixedly installed in the middle of the frame 1101, supports 1103 are movably sleeved on two sides of the frame 1101, permanent magnets 1104 are fixedly installed in the two supports 1103, a spring 1105 is fixedly connected between the permanent magnets 1104 and the electromagnet 1102, opposite magnetic poles of the permanent magnets 1104 installed on two sides of the electromagnet 1102 are the same, when the Raymond mill works, the electromagnet 1102 is electrified while an output shaft 10 rotates, the permanent magnets 1104 on two sides are extruded outwards by overcoming the pulling force of the spring 1105, the crushing power is made by the repulsive thrust of the electromagnet 1102 and the permanent magnets 1104, the problem that the pressure of the grinding roller 13 only depends on the centrifugal force of the grinding roller assembly is solved, the automatic adjustment of the grinding pressure can be realized, the spring 1105 can absorb shock for the grinding roller 13, the grinding roller 13 is prevented from violently impacting with a grinding ring 8 under the action of the centrifugal force when the machine is started, and the grinding roller 13 is caused, the grinding ring 8 is damaged.

Wherein, the inner shell 3 is positioned right above the grinding ring 8 and is fixedly connected with the shell 1 through a circular support, when the ground powder ascends under the air inlet of the air inlet volute 7 and the rotation action of the plum blossom frame 11, the ground powder can not enter the gap between the inner shell 3 and the shell 1, when the powder which is screened by the analyzer 4 at the upper part disperses around under the cyclone centrifugal action of the guide wheel 6 and the analyzer 4, the powder enters the gap between the inner shell 3 and the shell 1 and directly falls into the grinding ring 8 and the grinding roller 13 from the bottom opening of the inner shell 3 without contacting with the normally rising powder, thereby being convenient for the secondary grinding of the large particles, not only solving the problem that the grinding roller 13 and the grinding ring 8 are empty-ground due to the difficult falling of the large particles, but also avoiding the contact with the rising powder when the large particles fall, forming large particles for re-grinding, and solving the problem of repeated grinding of the powder, the crushing efficiency is improved.

Wherein, a plurality of groups helicla flute have been seted up in the outside of inducer 6, and inducer 6 highly be greater than 3 upper end open-ended heights in the interior casing, setting through inducer 6, make the powder that rises to diffusion all around under the effect of inducer 6, avoid appearing local powder more, the big problem of 4 operating pressure of analyzer, qualified powder passes through analyzer 4 entering collector in the powder of four scattered, unqualified large granule powder is then blown to casing 1 inner wall in the same direction as the area, and fall into grinding roller 13 along the inner wall, grind between the grinding ring 8.

Wherein, frame 1101, support 1103 are the magnetic material and make, and when lei meng mill during operation, electro-magnet 1102 and permanent magnet 1104 can produce magnetism and magnetize frame 1101, support 1103, adsorb iron fillings that thing such as grinding roller, grinding ring, scraper produced in the lei meng mill during operation wearing and tearing, avoid it to produce iron fillings because wearing and tearing and get into the finished product in, cause the influence to finished product quality.

Working principle, when the raymond mill during operation, output shaft 10 is rotatory simultaneously, electro-magnet 1102 circular telegram, overcome the pulling force of spring 1105, extrude both sides permanent magnet 1104 to the outside, do broken power through electro-magnet 1102 and permanent magnet 1104's repulsion thrust and grind the powder, the return charge after grinding rises under the fan effect in the inside casing 3, the powder that rises diffuses to all around under the effect of inducer 6, avoid appearing local powder more, the big problem of analyzer 4 operating pressure, qualified powder passes through analyzer 4 entering collector in the powder that looses, unqualified large granule powder is then blown to on the casing 1 inner wall along the area, and fall into grinding roller 13 along the inner wall, grind between the grinding ring 8.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a crocus pressure adjustable raymond mill machine, includes casing (1), the middle part fixed mounting of casing (1) one side has feed inlet (2), the middle part fixed mounting of casing (1) upper end has analyzer (4), the bottom fixed mounting of analyzer (4) has analyzer blade (5), the bottom fixedly connected with air inlet spiral case (7) of casing (1), the inboard of air inlet spiral case (7) is provided with grinds ring (8), the bottom fixedly connected with chassis (9) of air inlet spiral case (7), output shaft (10), its characterized in that have been cup jointed in the middle part activity of chassis (9): the upper end of the output shaft (10) is fixedly connected with a plum blossom frame (11), the outer side of the middle part of the bottom end of the plum blossom frame (11) is fixedly connected with a scraping cutter head (12), grinding rollers (13) are fixedly installed at two ends of the plum blossom frame (11), an inner shell (3) is arranged on the inner wall of the shell (1), and the middle part of the bottom end of the analyzer (4) is fixedly connected with a guide wheel (6);

the plum blossom rack (11) comprises a frame (1101), electromagnets (1102) are fixedly installed in the middle of the frame (1101), supports (1103) are movably sleeved on two sides of the frame (1101), permanent magnets (1104) are fixedly installed inside the two supports (1103), springs (1105) are fixedly connected between the permanent magnets (1104) and the electromagnets (1102), and opposite magnetic poles of the permanent magnets (1104) installed on two sides of the electromagnets (1102) are the same; the frame (1101) and the bracket (1103) are both made of magnetic conductive materials; when the output shaft (10) rotates, the electromagnet (1102) is electrified, the pulling force of the spring (1105) is overcome, the permanent magnets (1104) on the two sides are extruded outwards, and the repulsive thrust of the electromagnet (1102) and the permanent magnets (1104) is used for breaking power; the electromagnet (1102) and the permanent magnet (1104) can generate magnetism to magnetize the frame (1101) and the bracket (1103) and adsorb scrap iron generated by abrasion of the Raymond mill during working;

the inner shell (3) is positioned right above the grinding ring (8) and is fixedly connected with the shell (1) through a circular strut; when the powder after grinding rises downwards under the action of air inlet of an air inlet volute (7) and rotation of a plum blossom rack (11), the powder cannot enter a gap between an inner shell (3) and the shell (1), the powder remaining after being screened by an analyzer (4) above disperses around under the cyclone centrifugal action of a guide wheel (6) and the analyzer (4), enters a gap between the inner shell (3) and the shell (1), and directly falls into a grinding ring (8) and a grinding roller (13) from an opening at the bottom of the inner shell (3), and is not contacted with the normally rising powder, so that the secondary grinding of the large particles is facilitated.

2. The raymond mill with adjustable milling pressure as claimed in claim 1, characterized in that: the outer side of the guide wheel (6) is provided with a plurality of groups of spiral grooves, and the height of the guide wheel (6) is greater than that of the upper opening of the inner shell (3).