Hammer piece of a pulverizer

Abstract

The present invention aims to provide a hammer for a pulverizer capable of improving pulverizing efficiency and extending service life. The structure is as follows: A hammer for a pulverizer comprises a sheet-shaped hammer matrix, one end of the hammer matrix is ​​provided with a pin hole (1), two right angles of the other working end of the hammer matrix, namely the side end face (2) and the front end face (3), are both welded with wear-resistant material, the wear-resistant material is tungsten carbide alloy, and the characteristic is that the two right angles of the other working end of the hammer matrix are symmetrically removed to form an oblique push end face (4), and the front end face (3) and the side end face (2) connected thereto are welded with wear-resistant material to form a fan-shaped end face (5), and the upper and lower planes (8) of the hammer adjacent thereto are welded on three sides to form a spherical head (6), so that the side cross-sectional view of the hammer is in the shape of a matchstick with a spherical head (6).

Description

Technical Field

[0001] The present invention relates to a hammer piece of a pulverizer, in particular to a hammer piece used in a water drop type pulverizer, a micro pulverizer, a vertical pulverizer, a double rotor pulverizer, a multi-cavity pulverizer, a washboard type pulverizer, a screenless pulverizer and the like. Background Art

[0002] The hammer used in the prior art pulverizer is in the shape of a rectangular sheet, see national standard: SB / T10118-92, hammer pulverizer---hammer, one end of the hammer mother body is provided with a pin hole (1), which is used to connect with the rotor through a pin rod, a screw, etc., and the other end of the hammer is a pulverizing working end face, which is composed of a front end face (3), a side end face (2) and an upper and lower plane (8). Usually, the hammer mother body is made of ordinary steel, and the front end face (3) and the side end face (2) of the working end are welded with wear-resistant materials such as tungsten carbide, and the entire surface is carburized and hardened. A small iron plate is appropriately covered on the surface of the pin hole (1), and the shape of the cover is shown in the dotted line around the pin hole (1) to keep the pin hole (1) The periphery has toughness and does not become brittle. The pin hole and the working end face can also be manufactured to be symmetrical at both ends, and one end can be replaced and reused after being worn. As an important working part of the pulverizer, the hammer has the problems of low pulverizing efficiency and short service life. One reason is that the working end face of ordinary hammer is flat. When hammering the material, it pushes the material forward, causing the material to move at high speed in the same direction as the hammer, forming a rotating material ring in the screen cavity of the crusher, which reduces the speed difference between the subsequent hammer and the material, and reduces the crushing efficiency. At the same time, the screen hole is in the normal direction, and the material movement is in the tangential direction, which is not conducive to the discharge capacity of the crusher. The second reason is that the working end face of the ordinary hammer is subjected to the positive impact of the material for a long time, and the phenomenon of tungsten carbide fine particles falling off easily occurs. Therefore, for a long time, it has been difficult for the hammer used in the crusher to make a major breakthrough in crushing efficiency and service life. Summary of the invention

[0003] The invention aims to provide a hammer piece for a pulverizer which can improve the pulverizing efficiency and prolong the service life.

[0004] The inspiration of this technical solution comes from the pebbles in the riverbed and the clams in the Haihe River. All stones have formed the most stable shape, that is, oval, after billions of years of scouring and wear by the sea and rivers. The clams in the Haihe River, by natural selection, use the most economical raw materials to build the most solid houses, which are characterized by fan-shaped and rounded corners. In conjunction with this case: A hammer for a crusher, including a sheet-like hammer mother body, one end of the hammer mother body is provided with a pin hole (1), and the two right angles of the other working end of the hammer mother body, namely the side end face (2) and the front end face (3), are both welded with wear-resistant materials, and the wear-resistant material is tungsten carbide alloy. The characteristic is that the two right angles at the other working end of the hammer mother body are symmetrically removed and processed into an oblique push end face (4), and the angle A between the oblique push end face (4) and the side end face (2) is 30-60 The front end face (3) and the side end face (2) connected thereto are welded with wear-resistant materials to form a fan-shaped end face (5), the outermost width E of the fan-shaped end face (5) is greater than the width F of the hammer, E>F, and the upper and lower planes (8) of the hammer adjacent thereto are welded on three sides to form a spherical head (6), so that the cross-sectional view of the side of the hammer is in the shape of a matchstick with a spherical head (6), and the diameter of the spherical head (6) is greater than 1.5 times the thickness of the hammer, D≥1.5B. In this case, the two right angles of the working end of the hammer matrix can also be cut off to form a stepped end face (9) to increase the contact area of ​​the welding. The two side end faces (2) of the working end of the hammer matrix can also be made into oblique blades, and the blades can increase the crushing efficiency. The front end face (3) of the working end of the hammer matrix can also be made into a groove shape to increase the wear-resistant material. The fan-shaped end face (5) 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 (5) 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 pass through the screen, 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 (5) and the spherical head (6) reduce the frontal impact force of the material on the side end face (2) 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 refined by the impact of waves and sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 The front view of the hammer body is shown. A pin hole (1) is provided at one end of the hammer body. The working end face is composed of a front end face (3) and a side end face (2). The two right angles of the working end face are symmetrically removed to form an oblique push end face (4). The included angle A between the oblique push end face (4) and the side end face (2) is between 30 and 60 degrees.

[0006] Figure 2 yes Figure 1 Side view of the hammer working end.

[0007] Figure 3 It is a front view of the hammer mother body after the working end is welded with wear-resistant material, and the two side end faces (2) and the upper and lower planes (8) intersecting the front working end face (3) are welded on three sides, and the wear-resistant material welded on the working end faces is connected to form a fan-shaped end face (5), and the widest part of the fan-shaped end face (5) is E greater than the hammer width F.

[0008] Figure 4 yes Figure 3 The hammer is in an oval shape when viewed from the side.

[0009] Figure 5 yes Figure 3 The sectional view of the hammer piece along line AA shows that the end faces (2) on both sides and the upper and lower planes (8) intersecting the front working end face (3) are welded on three sides. In the sectional view, the spherical head (6) is welded high, so that the sectional view of the hammer piece along line BB is in the shape of a matchstick with a spherical head (6), wherein the diameter of the circle is greater than or equal to the thickness of the hammer piece, D≥b.

[0010] Figure 6 yes Figure 5 The BB view of the hammer is rectangular.

[0011] Figure 7 It is a front view of another hammer mother body, in which the hammer mother body is composed of a pin hole (1), a front end face (3) and a side end face (2). The two right angles at the working end are first cut off, and the original inclined push end face (4) is processed into a stepped end face (9).

[0012] Figure 8 It is a front view of another hammer body, in which the hammer is composed of a pin hole (1), a front end face (3) and a side end face (2), and the front end face (3) has a groove shape.

[0013] Fig. 9 It is a front view of another hammer matrix, in which the hammer matrix is ​​composed of a pin hole (1), a front end face (3) and a side end face (2), and the side end face (2) is processed into a sharp edge. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the embodiments given in the accompanying drawings:

[0015] Embodiment 1, a hammer for a pulverizer, comprising a sheet-shaped hammer matrix, one end of the hammer matrix is ​​provided with a pin hole (1), two right angles at the other working end of the hammer matrix, i.e., two side end faces (2) and a front working end face (3) are all welded with wear-resistant material, the wear-resistant material is tungsten carbide alloy, etc., and the characteristic is that at the two right angles at the other working end of the hammer matrix ( Figure 1), first cut off the right angle to form an oblique push end face (4), the angle A between the oblique push end face (4) and the side end face (2) is 45 degrees, such as Figure 1 Then, the front step is filled with wear-resistant material to form a fan-shaped end face (5), E>F, such as Figure 3 , and on its two side end faces (2), and the upper and lower planes intersecting with the front working end face (3), three sides are welded together, and the spherical head (6) is welded high. The diameter of the spherical head (6) is equal to 1.5 times the thickness of the hammer. The front end side view of the hammer is as follows. Figure 4 , a cross-sectional view of the hammer, the spherical head (6) and the parent body are in the shape of a matchstick with a spherical head, such as Figure 5 .

[0016] Embodiment 2, a hammer piece for a pulverizer ( Figure 1 ), comprising a sheet-shaped hammer matrix, one end of which is provided with a pin hole (1), the other end of which is a working end, and the two sides of which are side end surfaces (2), which are characterized in that two right angles ( Figure 1 ), cut off the right angle and process into a stepped end face (9), such as Figure 7 , the rest is the same as in Example 1.

[0017] Embodiment 3, a hammer piece for a pulverizer ( Figure 1 ), comprising a sheet-shaped hammer matrix, one end of which is provided with a pin hole (1), and the other working end of the hammer matrix, which is characterized in that the front end surface (3) of the other working end of the hammer matrix has a groove, such as Figure 8 , the rest is the same as in Example 1.

[0018] Embodiment 4, a hammer piece for a pulverizer ( Figure 1 ), comprising a sheet-shaped hammer matrix, one end of which is provided with a pin hole (1), and the other working end of the hammer matrix, wherein the other working end of the hammer matrix is ​​characterized in that both side end faces (2) are sharpened, such as Fig. 9 , the rest is the same as in Example 1.

[0019] Beneficial effects:

[0020] The fan-shaped front end surface of the hammer in this case and the screen surface form a hammer-screen gap, and the gap is from large to small. When hammering the material, the material can be squeezed and pushed to the screen surface, generating pressure against the screen surface, 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 by more than 30%; at the same time, the fan-shaped surface shape reduces the positive impact of the material on the side of the hammer, and the service life of the hammer is greatly extended. After the front wear-resistant material is welded into a sphere, it is also like a river pebble, very stable and very wear-resistant. During use, a miracle happened. Under the same conditions, the service life was extended by more than 3 times!

[0021] The embodiments listed in this case are only typical cases. Any other slightly modified hammer heads, such as spherical, quasi-spherical, oblique and stepped shapes at right angles, and various combinations of sharp edges, etc., are within the scope of the present invention. Any other forms of hammers for pulverizers, such as hammers on water drop type pulverizers, vertical pulverizers, double rotor pulverizers, multi-cavity pulverizers, micro pulverizers, etc., which adopt this technical solution, are within the scope of the present invention.

Claims

1. A hammer for a pulverizer, comprising a sheet-shaped hammer matrix, one end of the hammer matrix is ​​provided with a pin hole (1), two right angles of the other working end of the hammer matrix, namely the side end face (2) and the front end face (3), are all welded with wear-resistant materials, the wear-resistant material is tungsten carbide alloy, and the characteristics are that the two right angles of the other working end of the hammer matrix are symmetrically removed and processed to form an oblique push end face (4), the front end face (3) of the working end of the hammer matrix is ​​made into a groove shape, and the front end face (3) and the side end face (2) connected thereto are welded with wear-resistant materials to form a fan-shaped end face (5), and the upper and lower planes (8) of the hammer adjacent thereto are connected to each other by three-sided welding to form a spherical head (6), so that the side cross-sectional view of the hammer is in the shape of a matchstick with a spherical head (6), which can improve the crushing efficiency and extend the service life; The fan-shaped end surface (5) of the hammer and the screen surface form a hammer-screen gap, the gap is from large to small, when hammering the material, the fan-shaped end surface (5) of the hammer 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 following the rotation of the hammer, increasing the hammering speed difference between the subsequent hammer and the material, and improving the crushing efficiency; the width of the outermost end of the fan is greater than the width of the hammer, E>F, and the angle A between the oblique push end surface (4) and the side end surface (2) is 45 degrees.

2. The hammer for a pulverizer according to claim 1, characterized in that The fan-shaped end surface (5) and the upper and lower planes (8) of the hammer piece adjacent thereto are connected by three-sided surfacing welding to form a spherical head (6), so that the side cross-sectional view of the hammer piece is in the shape of a matchstick with the spherical head (6), and the diameter of the spherical head (6) is greater than 1.5 times the thickness of the hammer piece, D≥1.5B.

3. A hammer for a pulverizer as claimed in claim 1 or 2, characterized in that: The two right angles of the other working end of the hammer body are symmetrically cut to form a stepped end surface (9) to increase the contact area of ​​the surfacing welding.

4. A hammer for a pulverizer as claimed in claim 1 or 2, characterized in that: The two side end surfaces (2) of the working end of the hammer body are made into oblique cutting edges.

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