CN112547227B

CN112547227B - Dry-type ball mill for cement manufacture

Info

Publication number: CN112547227B
Application number: CN202011220508.4A
Authority: CN
Inventors: 程建华
Original assignee: Laiwu Lianyun Cement Co ltd
Current assignee: Laiwu Lianyun Cement Co.,Ltd.
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2022-04-08
Anticipated expiration: 2040-11-05
Also published as: CN112547227A

Abstract

The invention relates to the technical field of ball mills, and discloses a dry-type ball mill for cement production, which comprises a cylinder body, wherein a reverse material throwing mechanism is arranged in an inner cavity of the cylinder body, an outer gear is arranged on the outer wall of the cylinder body, the front end and the rear end of the cylinder body are rotatably connected with a connecting end body, a feeding hole is formed in the connecting end body, the feeding hole is communicated with a hollow shaft, and the hollow shaft extends into the inner cavity of the cylinder body. According to the invention, the reverse material throwing mechanism is arranged in the inner cavity of the cylinder body, and the reverse material throwing mechanism and the cylinder body are driven to rotate reversely by utilizing the rotating force of the cylinder body, so that the cylinder body and the reverse material throwing mechanism can drive the materials on the cylinder body to be thrown and dropped through the rotation of the cylinder body and the reverse material throwing mechanism, the bidirectional throwing effect is realized, the throwing area is increased, the area of a blank area is reduced, the probability of contact between a grinding body and the materials is increased, and the material grinding efficiency is improved.

Description

Dry-type ball mill for cement manufacture

Technical Field

The invention relates to the technical field of ball mills, in particular to a dry-type ball mill for cement production.

Background

The photovoltaic power generation equipment comprises a solar power generation assembly, a support system for supporting solar power generation and an electric ball mill, wherein the electric ball mill comprises a horizontal cylinder, a feeding and discharging hollow shaft, a grinding head and the like, the cylinder is a long cylinder, a grinding body is arranged in the cylinder, the cylinder is made of steel plates and is fixed with the cylinder through a steel lining plate, the grinding body is generally steel balls and is arranged in the cylinder according to different diameters and a certain proportion, and the grinding body can also be made of steel sections. The material is selected according to the granularity of the grinding material, the material is loaded into the barrel body from the hollow shaft at the feeding end of the ball mill, when the ball mill barrel body rotates, the grinding body is attached to the lining plate of the barrel body and taken away by the barrel body under the action of inertia and centrifugal force and friction force, when the grinding body is taken to a certain height, the grinding body is thrown off under the action of the gravity of the grinding body, and the falling grinding body breaks the material in the barrel body like a projectile body.

When the filling rate of the steel balls (the volume of all the steel balls is the percentage of the internal volume of the cylinder) is 40% -50%, and the ball mill rotates at different rotating speeds, three basic motion states of the grinding medium in the cylinder can occur.

In the first case, the rotating speed is too high, the centrifugal force enables the steel ball to rotate along with the cylinder body, the whole steel ball forms a circular ring tightly attached to the inner wall of the cylinder body, the circular ring is called as a 'turnover state', and the grinding medium cannot impact and grind materials.

In the second case, the rotational speed is too slow, the material and grinding media are raised to 40 ° to 50 ° along the mill rotation (there is also relative sliding between the layers during the raising, called slip), and when the friction between the grinding media and material and the bowl is equal to the dynamic friction angle, the grinding media and material slip down, called "slumping condition". Has grinding effect on materials but has no impact on the materials, thereby ensuring poor grinding efficiency.

In the third case, the rotation speed of the mill is moderate. After the grinding medium is lifted to a certain height along the cylinder, the grinding medium leaves the circular track and falls along the parabolic track in a free-falling mode, namely a 'falling state', and the steel ball falling along the parabolic track impacts and grinds the steel ball at the lower part of the cylinder or the lining plate of the cylinder, so that the material is crushed.

In summary, when the motion state of the grinding medium is the third condition, the grinding efficiency is highest, and when the falling motion area covers the surface of the whole material, the grinding benefit to the material is the greatest, but because the steel ball moves in a parabolic manner, a blank area exists in the cylinder, and if the blank area is large, the material in the area cannot be hit by the steel ball, so that the grinding efficiency is reduced; if it is necessary to increase the kinetic energy of the steel balls when being thrown out, that is, increase the rotational speed of the cylinder in order to reduce the area of the blank region, the energy consumption of the ball mill increases. In the blank area, no steel ball moves, so that the material in the blank area cannot be ground, and the material grinding efficiency is low; in addition, in the rotation process of the cylinder, the grinding body and the material are thrown off in the same direction, the grinding effect on the material in the throwing process cannot be achieved, the contact surface of the grinding body and the material is only the material distributing surface attached to the inner wall of the cylinder, if the material is not uniformly distributed in the rotation process of the cylinder, the grinding body is not impacted on the material after being thrown, but directly impacted on the inner wall of the cylinder, the grinding effect cannot be achieved, and the damage of the cylinder is accelerated.

Disclosure of Invention

Aiming at the defects of the prior ball mill in the use process in the background art, the invention provides the dry ball mill for cement production, which has the advantages of high grinding efficiency and long service life of a cylinder body, and solves the problems of low grinding efficiency and small contact surface between materials and a grinding body caused by large blank area in the background art.

The invention provides the following technical scheme: the utility model provides a dry-type ball mill for cement manufacture, includes the barrel, be equipped with reverse throwing material mechanism in the inner chamber of barrel, install the external gear on the outer wall of barrel, both ends are rotated around the barrel and are connected with the link body, the feed inlet has been seted up on the link body, the feed inlet intercommunication has the quill shaft, the quill shaft extends to in the inner chamber of barrel.

Preferably, reverse throwing material mechanism includes the fagging, the fagging is the hemicycle body and with the coaxial assembly of barrel, the both sides of fagging are provided with the slide, sliding connection has the chain in the slide, install the link joint on the chain, the both ends of fagging are equipped with main pivot, main pivot is connected with the link joint transmission, be equipped with the welt on the outer wall of link joint, be connected with elastic sealing area between two adjacent welts.

Preferably, the reverse material throwing mechanism is one in number, the reverse material throwing mechanism and the barrel reverse rotation, the barrel is a barrel shape without bottom surfaces in the front and back, the connecting end body is connected with the barrel rotation, a partition plate is arranged on the inner wall of the connecting end body, a driving gear is installed on the inner wall of the connecting end body, and a driven gear meshed with the driving gear is fixedly sleeved on the main rotating shaft.

Preferably, the reverse material throwing mechanisms are two in number and rotate reversely, a transmission chain set is sleeved on the main rotating shaft and connected to a rotating shaft of the motor, the barrel is hollow and barrel-shaped, and the main rotating shaft penetrates through an inner cavity of the barrel.

Preferably, the interior of the barrel body is rotatably connected with a partition plate, two ends of the supporting plate are respectively and fixedly connected to the partition plate and the outer wall of the partition plate, and the reverse material throwing mechanisms are in modularized distribution by taking the partition plate as a division point.

Preferably, the material of fagging and barrel is the same, also be equipped with the welt on the inner wall of barrel.

Preferably, the side surface of the cylinder body is provided with an airflow port between the two reverse material throwing mechanisms and the cylinder body, and the airflow port is connected with an air pump.

The invention has the following beneficial effects:

1. according to the invention, the reverse material throwing mechanism is arranged in the inner cavity of the cylinder body, and the reverse material throwing mechanism and the cylinder body are driven to rotate reversely by utilizing the rotating force of the cylinder body, so that the cylinder body and the reverse material throwing mechanism can drive the materials on the cylinder body to be thrown and dropped through the rotation of the cylinder body and the reverse material throwing mechanism, the bidirectional throwing effect is realized, the throwing area is increased, the area of a blank area is reduced, the probability of contact between a grinding body and the materials is increased, and the material grinding efficiency is improved.

2. According to the invention, through bidirectional throwing of the materials, compared with the traditional unidirectional throwing mode, the material throwing area is increased, so that the contact area of the materials and the grinding body is increased, and meanwhile, through the grinding mode of mutual impact in the air of the inner cavity of the cylinder body, the throwing speed of partial large materials and the grinding body is reduced after impact, so that the impact force of the grinding body on the inner wall of the cylinder body and the abrasion on the cylinder body are reduced, and the service life of the cylinder body is prolonged.

3. According to the ball mill, the mode that the two reversely rotating reverse material throwing mechanisms are used for replacing the mode that the barrel is used for driving the reverse material throwing mechanisms to rotate is adopted, so that the energy consumption is reduced as much as possible on the premise of improving the grinding effect and efficiency, and the practical performance of the ball mill is improved.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;

FIG. 2 is a schematic view of the connection structure of the supporting plate and the main rotating shaft of the reverse material throwing mechanism of the present invention;

FIG. 3 is a schematic view of the connection structure of the supporting plate and the chain plate of the reverse material throwing mechanism of the present invention;

FIG. 4 is a schematic structural diagram of a reverse material throwing mechanism of the present invention;

FIG. 5 is a schematic view of the attachment of the patch and elastic sealing band of the present invention;

FIG. 6 is a side, partially cross-sectional view of a first embodiment of the present invention;

FIG. 7 is a schematic structural diagram according to a second embodiment of the present invention;

fig. 8 is a side partial sectional view of a second embodiment of the present invention.

In the figure: 1. a barrel; 2. a reverse material throwing mechanism; 201. a supporting plate; 202. a slideway; 203. a main rotating shaft; 204. a chain plate; 3. an outer gear; 4. a liner plate; 5. an elastic sealing tape; 6. connecting the terminal body; 601. a feed inlet; 602. a hollow shaft; 603. a partition plate; 7. a driving gear; 8. a driven gear; 9. a partition panel; 10. a drive chain set; 11. an air flow port.

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. 1-8, a dry ball mill for cement production includes a cylinder 1, a reverse material throwing mechanism 2 is disposed in an inner cavity of the cylinder 1, an external gear 3 is mounted on an outer wall of the cylinder 1, the external gear 3 is driven to rotate by a gear, a connecting end body 6 is rotatably connected to front and rear ends of the cylinder 1, a feed inlet 601 is disposed on the connecting end body 6 at the front end of the cylinder 1, a discharge outlet is disposed on the connecting end body 6 at the rear end, the feed inlet 601 is communicated with a hollow shaft 602, the hollow shaft 602 extends into the inner cavity of the cylinder 1, and the hollow shaft 602 is used for conveying materials into the inner cavity of the cylinder 1.

The reverse material throwing mechanism 2 comprises a supporting plate 201, the supporting plate 201 is a semicircular body and is coaxially assembled with the barrel 1, the supporting plate 201 is made of the same material as the barrel 1, slide ways 202 are arranged on two sides of the supporting plate 201, chains are connected in the slide ways 202 in a sliding manner, chain plates 204 are installed on the chains, main rotating shafts 203 are arranged at two ends of the supporting plate 201, the main rotating shafts 203 are in transmission connection with the chain plates 204, referring to fig. 3-4, a transverse chain plate 204 is connected between every two adjacent chain plates 204, a small gear is sleeved on each cross rod and connected with the main rotating shafts 203 through the chains arranged in the slide ways 202, the chain plates 204 are driven to move through rotation of the main rotating shafts 203, lining plates 4 are arranged on the outer walls of the chain plates 204, lining plates 4 are also arranged on the inner walls of the barrel 1, and the structures of the lining plates 4 and the installation modes of the lining plates 204 in the prior art adopt the structures of the lining plates 4 and the installation modes of the lining plates 4 and the barrel 1, be connected with elastic sealing belt 5 between two adjacent welts 4, in this scheme, the crooked condition of gyration appears in the in-process that the link joint 204 and its outer wall mounting's welt 4 removed along slide 202, consequently, the gap can appear in the fill between link joint 204 and the welt 4, drop to the gap in order to reduce powdered material, use elastic sealing belt 5 to couple together adjacent welt 4, elastic sealing belt 5 can adopt the high rubber of intensity or elastic cloth, possess flexible and resilience characteristic can, in the in-process of abrasive material, the face that material and welt 4 contact is the interior concave surface of fagging 201, mutual extrusion between link joint 204 and the welt 4 this moment, the area that elastic sealing belt 5 exposes is very limited, consequently can not contact with the material by a large scale, can guarantee elastic sealing belt 5's life.

The first embodiment is as follows: referring to fig. 1, the number of the reverse material throwing mechanisms 2 is one, the reverse material throwing mechanisms 2 and the barrel 1 reversely rotate, referring to fig. 6, the barrel 1 is in a barrel shape without a front bottom surface and a rear bottom surface, the connection end body 6 is rotatably connected with the barrel 1, the connection end body 6 is fixed and does not rotate, the barrel 1 is driven to rotate by an external gear 3 arranged on the outer wall of the barrel 1 through a transmission gear sleeved on a motor rotating shaft, a partition plate 603 is arranged on the inner wall of the connection end body 6, the partition plate 603 is used for dividing the inner cavities of the barrel 1 and the connection end body 6 to prevent materials from entering the inner cavity of the connection end body 6, a driving gear 7 is installed on the inner wall of the connection end body 6, and a driven gear 8 meshed with the driving gear 7 is fixedly sleeved on the main rotating shaft 203. When the barrel body 1 rotates, the driving gear 7 drives the driven gear 8 to rotate, so as to drive the main rotating shaft 203 to rotate, and further drive the chain plate 204 and the lining plate 4 arranged on the chain plate 204 to rotate, and through the transmission mode, the rotation direction of the reverse material throwing mechanism 2 is opposite to the rotation direction of the cylinder body 1, and can be controlled by setting the rotation speed of the cylinder 1, and the gear ratio of the driving gear 7 and the driven gear 8, the materials and the grinding bodies which are turned upwards along the inner wall of the cylinder body 1 in the direction of right rotation collide with the materials and the grinding bodies which are turned upwards along the outer wall of the reverse material throwing mechanism 2 in the inner cavity of the cylinder body 1 in the throwing process, on one hand, the area of a throwing area in the inner cavity of the cylinder body 1 is increased, the utilization rate of the area of the inner cavity of the cylinder body 1 is improved, meanwhile, the condition that the materials cannot be ground due to the fact that the materials are outside the throwing area in the prior art is also avoided; on the other hand, because the materials can be collided and ground in the air, the damage of the grinding body and the materials to the inner wall of the cylinder body 1 is greatly reduced, and the service life of the ball mill is prolonged.

Example two: referring to fig. 7, the difference from the first embodiment is that the number of the reverse material throwing mechanisms 2 is two, the two reverse material throwing mechanisms 2 rotate in reverse directions, the cylinder 1 does not rotate, the main rotating shaft 203 is sleeved with the transmission chain set 10, the transmission chain set 10 is connected to the rotating shaft of the motor, and the cylinder 1 is hollow and barrel-shaped, that is, the front and the rear of the cylinder 1 are both provided with bottom surfaces. Compared with the first embodiment, the second embodiment can reduce half of energy consumption, in the first embodiment, the part of the cylinder 1 shielded by the reverse material throwing mechanism 2 does not participate in grinding materials, and if the weight of the reverse material throwing mechanism 2 is half of that of the cylinder 1, the weight of the whole three-half reverse material throwing mechanisms 2 is driven, but the weight of only two reverse material throwing mechanisms 2 is effectively driven, so in the first embodiment, the two reverse material throwing mechanisms 2 are directly driven to rotate by the motor, and the weight of the two reverse material throwing mechanisms 2 is effectively driven, thereby achieving the purpose of reducing energy consumption; at the joint of the two reverse material throwing mechanisms 2, particularly at the two reverse material throwing mechanisms 2 positioned below the barrel 1, because the two reverse material throwing mechanisms 2 rotate in reverse directions, the materials are subjected to shearing force between the two reverse material throwing mechanisms 2, so that the materials are crushed, and the efficiency of grinding the materials is improved; in addition, when the reverse material throwing mechanism 2 is manufactured, if the thickness of the reverse material throwing mechanism 2 is large, a large space can be formed between the two adjacent reverse material throwing mechanisms 2 and between the cylinder bodies 1, the powdery material can fall into the space and is not convenient to push the material out, so that the airflow port 11 between the two reverse material throwing mechanisms 2 and the cylinder bodies 1 is formed in the side surface of the cylinder body 1, the airflow port 11 is connected with an air pump, and the material is blown to the outlet end from the inlet end by airflow blown by the air pump.

In addition, in the above two embodiments, the partition plate 9 is rotatably connected inside the barrel 1, the partition plate 9 is in the prior art, and plays a role in screening material particles, and the conventional partition plate 9 is fixed on the barrel 1, but in the present application, the partition plate 9 is rotatably connected with the inner wall of the barrel 1, referring to fig. 6 and 8, two ends of the supporting plate 201 are respectively and fixedly connected to the outer walls of the partition plate 603 and the partition plate 9, the reverse material throwing mechanisms 2 are modularly distributed by using the partition plate 9 as a division point, that is, the reverse material throwing mechanisms 2 are respectively arranged in front of and behind the partition plate 9, and the two reverse material throwing mechanisms 2 are connected through the partition plate 9 and synchronously run of the driving gear 7, the driven gear 8 or the transmission chain group 10.

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 dry-type ball mill for cement manufacture, includes barrel (1), its characterized in that: the reverse material throwing device is characterized in that a reverse material throwing mechanism (2) is arranged in an inner cavity of the cylinder body (1), an outer gear (3) is mounted on the outer wall of the cylinder body (1), the front end and the rear end of the cylinder body (1) are rotatably connected with a connecting end body (6), a feeding hole (601) is formed in the connecting end body (6), the feeding hole (601) is communicated with a hollow shaft (602), and the hollow shaft (602) extends into the inner cavity of the cylinder body (1);

reverse throwing material mechanism (2) include fagging (201), fagging (201) be the hemicycle body and with barrel (1) coaxial assembly, the both sides of fagging (201) are provided with slide (202), sliding connection has the chain in slide (202), install link joint (204) on the chain, the both ends of fagging (201) are equipped with main pivot (203), main pivot (203) are connected with link joint (204) transmission, be equipped with welt (4) on the outer wall of link joint (204), be connected with elastic sealing area (5) between two adjacent welts (4).

2. The dry ball mill for cement production according to claim 1, characterized in that: the quantity of reverse material throwing mechanism (2) is one, reverse material throwing mechanism (2) and barrel (1) antiport, barrel (1) is the tubbiness of no bottom surface around for, connect end body (6) and barrel (1) swivelling joint, be equipped with baffle (603) on the inner wall of connect end body (6), install driving gear (7) on the inner wall of connect end body (6), fixed cup joint has driven gear (8) with driving gear (7) engaged with in the owner pivot (203).

3. The dry ball mill for cement production according to claim 1, characterized in that: the reverse material throwing mechanism (2) is two in quantity, two reverse material throwing mechanism (2) reverse rotation, driving chain group (10) have been cup jointed on main pivot (203), driving chain group (10) are connected to in the pivot of motor, barrel (1) is hollow tubbiness, main pivot (203) run through the inner chamber of barrel (1).

4. The dry ball mill for cement production according to claim 2, characterized in that: the inside of barrel (1) rotates and is connected with partition board (9), the both ends of fagging (201) are fixed connection respectively on the outer wall of baffle (603) and partition board (9), reverse throwing material mechanism (2) use partition board (9) to divide partition point modularization distribution.

5. The dry ball mill for cement production according to claim 1, characterized in that: the material of fagging (201) is the same with barrel (1), also be equipped with welt (4) on the inner wall of barrel (1).

6. The dry ball mill for cement production according to claim 3, characterized in that: an air flow opening (11) between the two reverse material throwing mechanisms (2) and the barrel body (1) is formed in the side face of the barrel body (1), and the air flow opening (11) is connected with an air pump.