A hammer mill

Abstract

The present invention provides a hammer mill, which is usually composed of a mill feed port (1), a hammer (2), a rotor (3), a door (4), a screen pressing frame (5), a motor (6), a mill discharge port (7), a machine body (8), a screen plate (9), etc. The hammer (2) is a round-headed fan-shaped hammer, one end of the hammer body is provided with a pin hole (20), and two right angles of the other working end of the hammer body, namely the side end face (22) and the front end face (21), are both welded with wear-resistant material, and the wear-resistant material is tungsten carbide alloy. The invention is characterized in that the two right angles at the other working end of the hammer body are symmetrically removed to form an oblique push end face (23), and then the front end face (21) and the side end face (22) connected thereto are welded with wear-resistant material to form a fan-shaped end face (25), and the upper and lower planes (24) of the hammer adjacent thereto are welded on three sides to form a spherical head (26), so that the cross-sectional view of the side of the hammer is in the shape of a matchstick with a spherical head (26), thereby improving the crushing efficiency, facilitating the material to be screened out, and extending the service life of the hammer (2).

Description

Technical Field

[0001] The invention patent relates to a hammer mill, which is usually used in feed, grain, food, chemical, medical and other industries. Background Art

[0002] This type of pulverizer is usually composed of a pulverizer feed port (1), hammers (2), rotors (3), doors (4), screen pressing frame (5), motor (6), pulverizer discharge port (7), machine body (8), screen plate (9), etc. During operation, the motor (6) drives the rotor (3) to rotate the hammers (2) on the rotor (3). After the material enters from the feed port (1), it is continuously pulverized by the hammers (2). After the material is pulverized, the qualified powder particles pass through the sieve holes of the screen plate (9) and are discharged from the pulverizer discharge port (7).

[0003] This type of crusher has the following problems:

[0004] 1. After the hammer of the crusher hits the material, the material follows the hammer and rotates around, the relative speed difference between the hammer and the material decreases, and the crushing efficiency is low. 2. The crusher screen hole is in the normal direction of the rotor center, while the hammer moves in the tangential direction, which is not conducive to the material out of the screen. 3. The side end face of the hammer is subjected to positive impact for a long time, and the service life is short. This has long been a key problem that has plagued the improvement of hammer crusher technology. Summary of the invention

[0005] The purpose of the patent of this invention is to provide a hammer crusher, which requires that after the hammer of the crusher hammers the material, the material no longer rotates around with the hammer. In the subsequent hammering, it is required to maintain a large relative speed difference between the hammer and the material to improve the crushing efficiency. At the same time, the material is changed from moving in the tangential direction with the hammer to the normal direction of the sieve hole, which is conducive to the material out of the sieve. The side end face of the hammer is changed to impact the material positively, which prolongs the service life of the hammer.

[0006] The key to the invention is the use of a newly designed hammer mill with the following structure:

[0007] A hammer pulverizer is composed of a feed inlet (1), a hammer (2), a rotor (3), a door (4), a screen pressing frame (5), a motor (6), a pulverizer discharge port (7), a machine body (8), a screen (9), etc. The characteristic of the hammer pulverizer is that the hammer working end surface of the hammer (2) is round-headed and fan-shaped.

[0008] The hammer of a pulverizer comprises a sheet-shaped hammer matrix, one end of which is provided with a pin hole (20), and two right angles of the other working end of the hammer matrix, namely a side end face (22) and a front end face (21), are both welded with wear-resistant materials, wherein the wear-resistant materials are tungsten carbide alloys. The hammer of the pulverizer comprises a sheet-shaped hammer matrix, one end of which is provided with a pin hole (20), and two right angles of the other working end of the hammer matrix, namely a side end face (22) and a front end face (21), are both welded with wear-resistant materials, and the wear-resistant materials are welded with the front end face (21) and the side end face (22) connected thereto to form a fan-shaped end face (25), and the upper and lower planes (24) of the hammer adjacent thereto are welded on three sides to form a spherical head (26), so that the side cross-sectional view of the hammer is in the shape of a matchstick. When the pulverizer is working, the fan-shaped end face (25) of the newly invented hammer and the screen surface form a new hammer-screen gap, the gap is from large to small. When hammering the material, the fan-shaped end face (25) of the hammer facing forward can generate a component force pressing against the screen surface, pushing the material to the screen hole, changing the phenomenon that the screen hole direction is inconsistent with the material movement direction, making it easier for the material to be screened out, and reducing the movement speed of the material following the rotation of the hammer, increasing the hammering speed difference between the subsequent hammer and the material, and improving the crushing efficiency; at the same time, the shape of the fan-shaped end face (25) and the spherical head (26) reduce the frontal impact force of the material on the side end face (22) of the hammer, and the service life of the hammer is greatly extended. Like pebbles in the river, the shape is stable and very wear-resistant. Like clams and shellfish, they are selected by nature and refined by the waves and sand.

[0009] The present invention can also adopt a crusher (10) equipped with a fixed hammer (10) Figure 3 A screen vibrating crusher can also be installed ( Figure 4 ), characterized in that a vibration motor (11) is provided below the screen pressing frame (5), the vibration motor (11) is connected to the screen pressing frame (18), and is isolated from the machine body (8) by a spring vibration isolation device (19), so that the screen pressing frame (5), the screen pressing frame (18) and the screen plate (9) can vibrate independently as a whole, thereby achieving a better crushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of a pulverizer according to the first embodiment of the present invention.

[0011] Figure 2 yes Figure 1 Cross-sectional view of .

[0012] Figure 3 It is a schematic structural diagram of the second embodiment of the present invention.

[0013] Figure 4 It is a schematic structural diagram of the third embodiment of the present invention.

[0014] Figure 5 This is the front view of the parent body of the round-headed fan-shaped hammer in the patented pulverizer of the present invention.

[0015] Figure 6 It is a front view of a round-headed fan-shaped hammer in the pulverizer of the present invention.

[0016] Figure 7 It is a cross-sectional view of a round-headed fan-shaped hammer in the pulverizer of the present invention. DETAILED DESCRIPTION

[0017] Embodiment 1: Figure 1 , Figure 2 A horizontal pulverizer comprises a pulverizer feed port (1), a hammer (2), a rotor (3), a door (4), a screen pressing frame (5), a motor (6), a pulverizer discharge port (7), a machine body (8), a screen (9), etc. A round-headed fan-shaped hammer is mounted on the rotor, wherein the two right angles at the other working end of the hammer mother body are symmetrically removed to form an oblique push end face (23), and the front end face (21) and the side end face (22) connected thereto are welded with wear-resistant materials to form a fan-shaped end face (25), and the upper and lower planes (24) of the hammer adjacent thereto are welded on three sides to form a round ball head (26), so that the side cross-sectional view of the hammer is in the shape of a matchstick with a round ball head (26).

[0018] Embodiment 2: Figure 3 A hammer mill with a fixed hammer (10), comprising a mill feed port (1), a hammer (2), a rotor (3), a door (4), a screen press frame (5), a motor (6), a mill discharge port (7), a machine body (8), a screen plate (9), etc., wherein the feed port (1) is provided with a fixed hammer (10), and the rotor (3) is provided with a round-headed fan-shaped hammer, which is the same as in Example 1.

[0019] Embodiment 3: Figure 4 A screen vibrating hammer mill comprises a mill feed port (1), a hammer (2), a rotor (3), a door (4), a screen pressing frame (5), a motor (6), a mill discharge port (7), a machine body (8), a screen plate (9), a fixed hammer (10), etc., characterized in that a vibration motor (11) is provided below the screen pressing frame (5), the vibration motor (11) is connected to the screen pressing frame (17), and the screen pressing frame (1) and the screen plate (9) can vibrate independently through a spring (19) vibration isolation device. The hammer installation method is the same as that of Example 1.

[0020] Beneficial effects:

[0021] The rotor of the pulverizer is provided with a round-headed fan-shaped hammer. When the pulverizer is working, the fan-shaped end face (25) of the newly invented hammer and the screen surface form a new hammer-screen gap, the gap is from large to small. When hammering the material, the fan-shaped end face (25) of the hammer facing forward can generate a component force pressing against the screen surface, pushing the material toward the screen hole, changing the phenomenon that the screen hole and the material movement direction are inconsistent, making it easier for the material to be screened out, and reducing the movement speed of the material following the rotation of the hammer, increasing the hammering speed difference between the subsequent hammer and the material, and improving the crushing efficiency; at the same time, the shape of the fan-shaped end face (25) and the round ball head (26) reduce the positive impact force of the material on the side end face (22) of the hammer, and the service life of the hammer is greatly extended. In particular, the embodiment 2 adds a fixed hammer (10) and the embodiment 3 adds screen vibration, and the effect is particularly obvious.

[0022] The embodiments listed in this case are only typical cases. The hammers of any other forms of grinders, such as the hammers on teardrop grinders, vertical grinders, double-rotor grinders, multi-cavity grinders, micro grinders, etc., which adopt the present technical solution, are within the scope of the present invention.

Claims

1. A hammer mill, comprising a mill feed inlet (1), a hammer (2), a rotor (3), a door (4), a screen pressing frame (5), a motor (6), a mill discharge (7), a machine body (8), and a screen (9), wherein a pin hole (20) is provided at one end of the hammer mother body (24), and two right angles at the other working end, namely, the side end face (22) and the front end face (21), are both welded with wear-resistant materials, wherein the hammer mother body (24) is provided with a pin hole (20), and the two right angles at the other working end, namely, the side end face (22) and the front end face (21), are welded with wear-resistant materials, and the hammer mother body (24) is provided with a pin hole (20) at one end of the hammer mother body (24). The hammer mill described herein has a round-headed fan-shaped hammer (2), and the hammer matrix (24) The two right angles of the other working end are symmetrically removed to form an oblique push end face (23), and the front end face (21) and the side end face (22) connected thereto are welded with wear-resistant materials to form a fan-shaped end face (25). The fan-shaped end face (25) of the hammer piece and the screen surface form a hammer-screen gap, and the gap is from large to small. When hammering the material, the fan-shaped end face (25) of the hammer piece facing forward generates a component force pressing against the screen surface, pushing the material toward the screen hole, making it easy for the material to be screened out, and reducing the movement speed of the material rotating with the hammer piece, increasing the hammering speed difference between the subsequent hammer piece and the material, and improving the crushing efficiency. The upper and lower planes of the adjacent hammer piece matrix (24) are connected and welded on three sides to form a spherical head (26), so that the cross-sectional view of the side of the hammer piece is in the shape of a matchstick with a spherical head (26), reducing the positive impact force of the material on the side end face (22) of the hammer piece, and extending the service life of the hammer piece; The feed inlet (1) is provided with a fixed hammer (10).

2. A hammer mill as claimed in claim 1, characterized in that A vibration motor (11) is provided below the screen pressing frame (5). The screen pressing frame (5) is connected to the screen pressing frame (18) via a hinge (17). The screen pressing frame (5) is turned over to clamp the screen plate (9). The vibration motor (11) is connected to the screen pressing frame (18) and isolated from the machine body (8) via a spring vibration isolation device (19), so that the screen pressing frame (5), the screen pressing frame (18) and the screen plate (9) can vibrate independently as a whole.

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