CN215743822U

CN215743822U - Vertical impact mill

Info

Publication number: CN215743822U
Application number: CN202120377800.0U
Authority: CN
Inventors: 曹志国
Original assignee: Sichuan Juzi Powder Equipment Co ltd
Current assignee: Sichuan Juzi Powder Equipment Co ltd
Priority date: 2021-02-18
Filing date: 2021-02-18
Publication date: 2022-02-08
Anticipated expiration: 2031-02-18

Abstract

The utility model discloses a vertical impact mill, which comprises an L-shaped lining plate, a new hammer head, an impact disc, a material blocking ring, a shell and a shaft system, wherein a straight lining plate is changed into the L-shaped lining plate, so that the phenomenon that the impact, collision and shearing force of the impact hammer head and the lining plate on powder particles are weakened due to overhigh wind speed along the inner wall of the plate is avoided; meanwhile, because a gap of 2-10mm is formed between the lower surface of the part, close to the outer circle front end, of the new hammer head and the L-shaped lining plate, powder particles at the position can be forcibly impacted, extruded and sheared by the rotating new hammer head, so that the powder particles are crushed, and the crushing efficiency can be greatly improved.

Description

Vertical impact mill

Technical Field

The utility model relates to powder crushing and grading equipment, in particular to an impact mill of the powder crushing and grading equipment.

Background

The existing vertical impact mill is shown in attached figure 1 of the specification and comprises a grading straight lining plate 1, a hammer 2, an impact disc 3, a material blocking ring 4, a shell 5 and a shaft system 6. Its straight welt 1 dress is on 5 upper end inner walls of casing, keeps off material ring 4 welding at 5 inner walls of casing, is located the below of straight welt 1, and shafting 6 assembles inside 5 casing, and its main shaft upper end assembly strikes dish 3, and 2 assembly of tup are at the last plane of strikeing dish 3, and 2 and the strikeing dish 3 of tup are located welt distribution circumference inboardly, keep off the top of material ring 4.

The existing vertical impact mill has the working process that: the impact disc 3 drives the hammer head 2 to rotate at a speed of 80-110m/s, one part of powder particles are collided and crushed by the hammer head 2, the other part of powder particles are thrown to the inner wall of the straight lining plate 1 under the action of the rotary impact disc 3 and the hammer head 2 and are collided and crushed with the inner wall again, and meanwhile, due to the fact that the impact disc 3 and the hammer head 2 rotate at a high speed, shearing and extrusion force can be applied to the powder particles by the rotary excircle of the impact disc and the inner wall of the lining plate, and the powder particles are crushed. Air enters the shell 5 from an air inlet at the lower part of the shell 5 in the arrow direction, enters the upper part of the impact disc 3 from a gap between the material blocking ring 4 and the lower end face of the impact disc 3 through a gap between the excircle of the impact disc 3 and the inner side of the straight lining plate 1, and blows powder particles to reach equipment above a main machine of the vertical impact mill; the coarse particles fall down and continue to be crushed in the vertical impact mill.

The existing vertical impact mill has the following defects: because the air gets into the top of strikeing dish 3 through strikeing 3 excircles and straight 1 inboard clearances of welt for welt inner wall wind speed is higher, leads to the impact force of powder granule on the welt to weaken, and simultaneously, the air current will rise from the seam between straight welt 1 and the 3 excircles of strikeing dish, and powder granule dwell time is short here, and it has just been taken away by the air current not strikeed the impact, and powder granule is only to be the circulation flow in vertical impact mill. Therefore, the conventional vertical impact mill is not efficient.

Disclosure of Invention

The utility model aims to provide a novel vertical impact mill by improving the structure of the vertical impact mill aiming at the defects of the prior technical scheme so as to meet the social requirements.

The technical scheme of the utility model is as follows:

a vertical impact mill comprises an L-shaped lining plate 7, a new hammer 8, an impact disc 3, a material blocking ring 4, a shell 5 and a shaft system 6, and is characterized in that the L-shaped lining plate 7 is arranged on the inner wall of the upper end of the shell 5; the material blocking ring 4 is welded below an L-shaped lining plate 7 on the inner wall of the shell 5; the shaft system 6 is assembled inside the shell 5; the upper end of a main shaft of the device is provided with an impact disc 3; the new hammer 8 is assembled on the upper plane of the impact disc 3, and the new hammer 8 and the impact disc 3 are positioned on the inner side of the distribution circumference of the lining plate; the material blocking ring 4 is arranged above; the excircle of the impact disc 3 and the end surface of the inner side of the horizontal position end of the L-shaped lining plate 7 form a circular seam gap; the joint surface of 8 impact discs 3 of the new hammer head is 2-10mm higher than the upper plane of the horizontal position of the L-shaped lining plate 7; a gap of 2-10mm is formed between the lower surface of the part, close to the outer circle front end, of the new hammer 8 and the L-shaped lining plate 7; the length of the new hammer head 8 is approximately 1.5 times the length of the hammer head 2.

The impact disc 3 drives the new hammer 8 to rotate at a speed of 80-110m/s, one part of powder particles are crushed by the collision of the new hammer 8, the other part of powder particles are thrown to the inner wall of the L-shaped lining plate 7 under the action of the rotary impact disc 3 and the new hammer 2 and are crushed by the collision of the inner wall again, meanwhile, due to the special right-angle structure of the L-shaped lining plate 7, the powder particles cannot be rapidly taken away by airflow, due to the high-speed rotation of the impact disc 3 and the new hammer 8, the rotary excircle and the inner wall of the lining plate can apply shearing and extrusion forces to the powder particles, and meanwhile, due to the 2-10mm gap between the part below the excircle front end of the new hammer 8 and the L-shaped lining plate 7, the powder particles can be forcibly impacted, extruded and sheared by the rotary new hammer 8, so that the powder particles are crushed. The pulverized powder particles are stirred up by the rotating new hammer head 8. Air enters the shell 5 from an air inlet at the lower part of the shell 5 in the arrow direction, and a circular seam gap is formed between the outer circle of the impact disc 3 and the inner side end face of the horizontal position end of the L-shaped lining plate 7 through a gap between the lower end faces of the material blocking ring 4 and the impact disc 3, enters the upper part of the impact disc 3, and blows powder particles stirred by the rotating new hammer 8 to reach equipment above the main machine of the vertical impact mill. The coarse particles fall down and continue to be crushed in the vertical impact mill. Meanwhile, as the excircle of the impact disc 3 and the end surface of the inner side of the horizontal position end of the L-shaped lining plate 7 form a circular seam gap and are positioned in the middle of the new hammer 8, the crushed fine powder body after the collision of the new hammer 8 is directly taken away by the ascending air flow in the circular seam, and the coarse particles have large mass and large inertia and can be thrown to the root of the L-shaped lining plate 7 and the inner side of the L-shaped lining plate to continue to collide and crush.

According to the utility model, the straight lining plate 1 is changed into the L-shaped lining plate 7, so that the phenomenon that the impact, collision and shearing force of the impact hammer head and the lining plate on powder particles are weakened due to overhigh wind speed along the inner wall of the lining plate is avoided. Meanwhile, because a gap of 2-10mm is formed between the lower surface of the part, close to the outer circle front end, of the new hammer 8 and the L-shaped lining plate 7, powder particles at the position can be forcibly impacted, extruded and sheared by the rotating new hammer 8, and the powder particles are crushed. Therefore, the vertical impact mill can realize more efficient crushing than the prior impact mill. The aim of the utility model can be achieved through practice verification.

Drawings

Fig. 1 is a front view of a structure diagram of a conventional vertical impact mill, fig. 2 is a top view of the structure diagram of the conventional vertical impact mill, fig. 3 is a front view of the structure diagram of the vertical impact mill of the present invention, fig. 4 is a top view of the structure diagram of the vertical impact mill of the present invention, fig. 5 is an "L" lining plate 7, and fig. 6 is a structure diagram of a new hammer 8. In the figure, 1 is a straight-tooth plate, 2 is a hammer, 3 is an impact disc, 4 is a material blocking ring, 5 is a shell, 6 is a shaft system, 7 is an L-shaped lining plate, and 8 is a new hammer.

Detailed Description

The specific implementation mode of the utility model is shown in the attached drawings of the specification, and the attached drawings 3, 4, 5 and 6 of the specification are an example of the utility model. The novel hammer comprises an impact disc 3, a material blocking ring 4, a shell 5, a shaft system 6, an 'L' -lining plate 7 and a new hammer 8. An L-shaped lining plate 7 is arranged on the inner wall of the upper end of the shell 5; the material blocking ring 4 is welded below an L-shaped lining plate 7 on the inner wall of the shell 5; the shaft system 6 is assembled inside the shell 5; the upper end of a main shaft of the device is provided with an impact disc 3; the new hammer 8 is assembled on the upper plane of the impact disc 3, and the new hammer 8 and the impact disc 3 are positioned on the inner side of the distribution circumference of the lining plate; the material blocking ring 4 is arranged above; the excircle of the impact disc 3 and the end surface of the inner side of the horizontal position end of the L-shaped lining plate 7 form a circular seam gap; the joint surface of 8 impact discs 3 of the new hammer head is 2-10mm higher than the upper plane of the horizontal position of the L-shaped lining plate 7; a gap of 2-10mm is formed between the lower surface of the part, close to the outer circle front end, of the new hammer 8 and the L-shaped lining plate 7; the length of the new hammer head 8 is approximately 1.5 times the length of the hammer head 2.

The working process of the utility model is as follows: the impact disc 3 drives the new hammer 8 to rotate at a speed of 80-110m/s, one part of powder particles are crushed by the collision of the new hammer 8, the other part of powder particles are thrown to the inner wall of the L-shaped lining plate 7 under the action of the rotary impact disc 3 and the new hammer 2 and are crushed by the collision of the inner wall again, meanwhile, due to the special right-angle structure of the L-shaped lining plate 7, the powder particles cannot be rapidly taken away by airflow, due to the high-speed rotation of the impact disc 3 and the new hammer 8, the rotary excircle and the inner wall of the lining plate can apply shearing and extrusion forces to the powder particles, and meanwhile, due to the 2-10mm gap between the part below the excircle front end of the new hammer 8 and the L-shaped lining plate 7, the powder particles can be forcibly impacted, extruded and sheared by the rotary new hammer 8, so that the powder particles are crushed. The pulverized powder particles are stirred up by the rotating new hammer head 8. Air enters the shell 5 from an air inlet at the lower part of the shell 5 in the arrow direction, and a circular seam gap is formed between the outer circle of the impact disc 3 and the inner side end face of the horizontal position end of the L-shaped lining plate 7 through a gap between the lower end faces of the material blocking ring 4 and the impact disc 3, enters the upper part of the impact disc 3, and blows powder particles stirred by the rotating new hammer 8 to reach equipment above the main machine of the vertical impact mill. The coarse particles fall down and continue to be crushed in the vertical impact mill. Meanwhile, as the excircle of the impact disc 3 and the end surface of the inner side of the horizontal position end of the L-shaped lining plate 7 form a circular seam gap and are positioned in the middle of the new hammer 8, the crushed fine powder body after the collision of the new hammer 8 is directly taken away by the ascending air flow in the circular seam, and the coarse particles have large mass and large inertia and can be thrown to the root of the L-shaped lining plate 7 and the inner side of the L-shaped lining plate to continue to collide and crush.

The utility model changes the straight lining plate 1 into the L-shaped lining plate 7, thereby avoiding that the impact, collision and shearing force of the impact hammer head and the lining plate to the powder particles are weakened due to overhigh wind speed along the inner wall of the plate; meanwhile, because a gap of 2-10mm is formed between the lower surface of the part, close to the outer circle front end, of the new hammer 8 and the L-shaped lining plate 7, powder particles at the position can be forcibly impacted, extruded and sheared by the rotating new hammer 8, and the powder particles are crushed. Trial tests prove that the vertical impact mill can realize higher-efficiency crushing than the conventional impact mill, overcomes the defects of the conventional impact mill, and can achieve the aim of the utility model.

Claims

1. A vertical impact mill comprises an L-shaped lining plate (7), a new hammer head (8), an impact disc (3), a material blocking ring (4), a shell (5) and a shaft system (6), and is characterized in that the L-shaped lining plate (7) is arranged on the inner wall of the upper end of the shell (5); the material blocking ring (4) is welded below an L-shaped lining plate (7) on the inner wall of the shell (5); the shaft system (6) is assembled inside the shell (5); the upper end of a main shaft of the device is provided with an impact disc (3); the new hammer head (8) is assembled on the upper plane of the impact disc (3), and the new hammer head (8) and the impact disc (3) are positioned on the inner side of the distribution circumference of the lining plate; the material blocking ring (4) is arranged above the material blocking ring; the excircle of the impact disc (3) and the end surface of the inner side of the horizontal position end of the L-shaped lining plate (7) form a circular seam gap; the joint surface of the impact discs (3) of the new hammer (8) is 2-10mm higher than the upper plane of the horizontal position of the L-shaped lining plate (7); a gap of 2-10mm is reserved between the lower surface of the part, close to the outer circle front end, of the new hammer head (8) and the L-shaped lining plate (7); the length of the new hammer head (8) is 1.5 times of the length of the hammer head 2.