Hammer type recrusher with hammering and planing integrated function

Abstract

The utility model provides a hammer type recrushing machine with a hammering and planing integrated function. The hammer type recrushing machine comprises a machine shell, a crushing assembly, a driving assembly and a screen. A crushing cavity is formed in the machine shell, and the crushing assembly is located in the crushing cavity and rotatably installed on the machine shell. The driving assembly is configured to drive the crushing assembly to rotate so as to crush materials in the crushing cavity for the first time. The screen is arranged below the crushing assembly, a plurality of meshes allowing crushed materials of the target size to pass through are formed in the screen, a plurality of protrusions are arranged on the screen, each protrusion extends upwards from one end of the edge of the corresponding mesh and extends towards the other end of the edge of the corresponding mesh to form a tail, and an opening communicated with the corresponding mesh is formed between the tail and the screen. And the direction of each opening is opposite to the rotating direction of the crushing assembly, so that the materials are driven by the crushing assembly to impact the tail part for secondary crushing.

Description

TECHNICAL FIELD

[0001] The utility model relates to the straw raw material processing field especially, relate to a hammer type regrinder with hammer planing integrated function. BACKGROUND

[0002] The artificial board mainly includes shaving board, fiberboard and straw board etc., wherein, the straw board takes surplus crops such as rice straw, wheat straw as raw material, after the treatment such as crushing, mixing, paving, hot pressing, finally gets finished board, not only satisfies the environmental protection demand of present, and has good mechanical property, thus is widely used in building material, furniture manufacturing etc.

[0003] In the process from straw raw material to finished board, the crushing treatment is a key step, and the purpose of the crushing treatment of straw raw material is to crush the straw into powder of target size, so as to be mixed uniformly with other additives, and form a board blank with good fluidity and plasticity. The crushing treatment not only can increase the specific surface area of the straw raw material, improve the bonding force with other components, but also can destroy the fiber structure in the straw, so that it is more easily penetrated and fixed by the adhesive.

[0004] At present, the mechanical crushing method is usually used to crush the straw raw material, such as hammer crushing or blade crushing, wherein the uniformity of the blade crushing is poor, and the blade is quickly worn out, so the use cost and energy consumption are high, therefore, the hammer crushing is more widely used. In the utility model authorization patent document with the publication number CN208004049U, a hammer type regrinder with a material extraction door structure is proposed, which crushes the straw raw material by the rotation of the rotor 23 to drive the hammer piece 24, and filters out the qualified crushed fine material by the screen 22. But the crushing efficiency of the hammer piece is low, although the fixed knife can be arranged inside the machine to improve the crushing efficiency, but the rotor itself occupies a large space, and the number of fixed knives is extremely limited, therefore, how to improve the structure of the screen to help improve the crushing efficiency while filtering the qualified crushed material becomes a technical problem to be solved. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a hammer type regrinder with hammer planing integrated function, which has secondary crushing, i.e. planing function, makes up for the shortage of limited space arrangement of fixed knife, and effectively improves the crushing efficiency.

[0006] In order to achieve the above object, the utility model provides a hammer type regrind machine with hammering and planing integrated functions, which comprises: a casing, a crushing cavity is formed in the casing; a crushing assembly is rotatably installed in the crushing cavity and on the casing; a driving assembly is configured to drive the crushing assembly to rotate so as to perform primary crushing on the material in the crushing cavity; a screen is arranged below the crushing assembly, a plurality of mesh holes allowing only the crushed material of a target size to pass through are formed on the screen; a plurality of protrusions are arranged on the screen, each of the protrusions extends upward from one end of the edge of the mesh hole and simultaneously extends to the other end of the edge and forms a tail part, an opening in communication with the mesh hole is formed between the tail part and the screen, and the direction of each of the openings is opposite to the rotation direction of the crushing assembly so that the material is secondarily crushed by impacting the tail part under the driving of the crushing assembly.

[0007] In an exemplary embodiment, the screen is configured as an arc-shaped screen and is arranged along the rotation track circle of the crushing assembly.

[0008] In an exemplary embodiment, the curvature of the arc-shaped screen is greater than or equal to π / 2 rad.

[0009] In an exemplary embodiment, the protrusions are configured as arcs in the vertical section along the extension direction thereof.

[0010] In an exemplary embodiment, a first fixed knife set arranged along the rotation track circle of the crushing assembly is further included, the first fixed knife set comprises: a first positioning member fixedly connected to the inner wall of the casing; a plurality of fixed knives are arranged on the first positioning member at intervals, and the cutting edge of each of the fixed knives faces the crushing assembly.

[0011] In an exemplary embodiment, the first positioning member is configured as an arc-shaped plate, and the circumference of the arc-shaped plate is a concentric circle of the rotation track circle of the crushing assembly.

[0012] In an exemplary embodiment, two of the crushing assemblies are arranged at intervals in the horizontal direction, and the rotation directions of the two crushing assemblies are opposite.

[0013] In an exemplary embodiment, the first fixed knife set is arranged above each of the crushing assemblies; and a second fixed knife set is further arranged between the two crushing assemblies, the second fixed knife set comprises: a second positioning member configured to be tangent to the rotation track circles of the two crushing assemblies at the same time; and a plurality of fixed knives arranged on the surface of the second positioning member facing the crushing assemblies.

[0014] In an exemplary embodiment, the crushing assembly includes a rotor mounted to the housing by a bearing block, and a plurality of hammers spaced apart in a circumferential direction on the rotor, the hammers being configured to rotate relative to the rotor under centrifugal force to crush the material.

[0015] In an exemplary embodiment, the driving assembly includes a motor disposed outside the housing, and a belt by which the motor drives the crushing assembly to rotate.

[0016] The hammer-type re-crusher with the hammer-planing integrated function provided by the utility model, after the material enters the crushing cavity of the housing from top to bottom, the material is crushed once along with the rotation of the crushing assembly, the crushed material falls or is taken to the lower screen by the crushing assembly, the part of the crushed material smaller than or equal to the target size will pass through the opening and the mesh hole in turn and leave the crushing cavity and finally be discharged. The part of the crushed material larger than the target size will impact the convex tail under the driving of the crushing assembly and be crushed again, the part smaller than or equal to the target size after the crushing directly passes through the mesh hole and is discharged, and the remaining part is taken along with the rotation of the crushing assembly and mixed with the raw material entering the crushing cavity to be crushed, so that the crushing efficiency is effectively improved, and the space utilization rate inside the housing is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other objects, features and advantages of the utility model will become more apparent from the following description of the utility model embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 is a whole structure schematic view of the hammer-type re-crusher with the hammer-planing integrated function provided by the utility model;

[0019] Figure 2 is Figure 1 is a partial enlarged view of the exemplary embodiment shown in the figure;

[0020] Figure 3 is Figure 2 is a partial enlarged view of A in the figure;

[0021] Figure 4 is Figure 1 is a three-dimensional structure view of the hammer in the exemplary embodiment shown in the figure;

[0022] Figure 5 is Figure 1 is a plane schematic view of the hammer in the exemplary embodiment shown in the figure.

[0023] In the above figures, the meanings of the reference signs are as follows:

[0024] 1, housing;

[0025] 2, crushing assembly;

[0026] 21, rotor;

[0027] 22, hammer;

[0028] 220, side surface of hammer body;

[0029] 221, wear-resistant part;

[0030] 2211, side surface of wear-resistant part;

[0031] 2212, end surface of wear-resistant part;

[0032] 3, driving assembly;

[0033] 31, motor;

[0034] 32, belt;

[0035] 4, screen;

[0036] 41, mesh;

[0037] 42, inner screen frame;

[0038] 43, outer screen frame;

[0039] 5, protrusion;

[0040] 6, first positioning member;

[0041] 7, fixed knife;

[0042] 8, second positioning member;

[0043] 9, material removal door. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to specific embodiments and drawings.

[0045] The terms used herein are merely used to describe specific embodiments, and are not intended to limit the present application. The terms "include", "contain" and the like used herein indicate the existence of the described features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0046] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have meanings consistent with the context of the present specification, and should not be interpreted in an idealized or overly formal manner.

[0047] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0048] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0049] Figure 1 This is a schematic diagram of the overall structure of a hammer mill with integrated hammer and planer functions provided by this utility model. Figure 2 yes Figure 1 A partially enlarged view of the exemplary embodiment shown. Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0050] An exemplary embodiment of this utility model provides a hammer mill with integrated hammer and planer functions, such as... Figures 1 to 3 As shown, the device includes a housing 1, a crushing assembly 2, a drive assembly 3, and a screen 4. A crushing chamber is formed within the housing 1, and the crushing assembly 2 is rotatably mounted on the housing 1 within the crushing chamber. The drive assembly 3 is configured to drive the crushing assembly 2 to rotate, thereby performing primary crushing of the material within the crushing chamber. The screen 4 is arranged below the crushing assembly 2, and has multiple mesh openings 41 formed on it to allow material of the target size to pass through. The screen 4 also has multiple protrusions 5, each extending upwards from one edge of the mesh opening 41 and simultaneously towards the other edge to form a tail. An opening communicating with the mesh opening 41 is formed between the tail and the screen 4. The direction of each opening is opposite to the rotation direction of the crushing assembly 2, so that the material, driven by the crushing assembly 2, impacts the tail for secondary crushing.

[0051] In such an embodiment, the casing 1 is formed with an inlet 11 and an outlet 12. After the material enters the crushing cavity of the casing 1 from the inlet 11, the material is crushed once and carried to the lower screen by the rotation of the crushing assembly 2. The part of the crushed material that is smaller than or equal to the target size will pass through the openings and the mesh holes 41 in turn and leave the crushing cavity, and finally be discharged from the outlet 12. The part of the crushed material that is larger than the target size will be impacted by the tail of the protrusion 5 under the driving of the crushing assembly 2 to be crushed again. The part of the crushed material that is smaller than or equal to the target size after the secondary crushing passes through the mesh holes 41 and is discharged from the outlet 12, and the remaining part is carried by the rotation of the crushing assembly 2, mixed with the raw material that just enters the crushing cavity, and crushed, thus improving the crushing efficiency and the space utilization rate of the casing 1.

[0052] It should be noted that in the secondary crushing process, the material is mainly crushed by impacting the tail of the protrusion 5 when the material rotates with the crushing assembly 2. Therefore, the secondary crushing process is also a shredding process.

[0053] In addition, the mesh holes 41 include but are not limited to holes in the shapes of circles, ellipses, or squares, which are suitable for screening purposes.

[0054] According to an embodiment of the present disclosure, the screen 4 is configured as an arc-shaped screen and is arranged along the rotation track circle of the crushing assembly 2.

[0055] In such an embodiment, the screen 4 is provided with the protrusion 5, and the distance between the protrusion 5 and the crushing assembly 2 needs to be kept within a predetermined range to better play the shredding effect of the protrusion 5. To make as many protrusions 5 on the screen 4 as possible participate in the shredding, the screen 4 is configured as an arc-shaped screen and is arranged along the rotation track circle of the crushing assembly 2, or in other words, is arranged around the rotation track circle of the crushing assembly 2, thus improving the shredding effect.

[0056] More specifically, the curvature of the arc-shaped screen is greater than or equal to π / 2 rad. Since the screen 4 is an arc-shaped screen, its curvature needs to be greater than or equal to π / 2 rad to more surround the rotation track circle of the crushing assembly 2. If the curvature is too small, it will not only affect the crushing efficiency, but also affect the filtering and discharging speed, causing the material to accumulate in the crushing cavity and affecting the normal work of the crushing assembly 2. It should be noted that the curvature should not be too large, and is usually not greater than 5π / 4 rad, so as not to affect the movement of the material in the crushing cavity and the normal discharge of the qualified crushed material.

[0057] In some other embodiments, an inner screen frame 42 and an outer screen frame 43 are further included, which are detachably fixed to the inner wall of the casing 1. The screen 4 is installed between the inner screen frame 42 and the outer screen frame 43, so that the screen 4 can be removed together with the inner screen frame 42 and the outer screen frame 43 from the crushing cavity for maintenance and repair.

[0058] In an exemplary embodiment, the vertical section of the protrusion 5 along its extending direction is configured in an arc shape. When encountering materials that are difficult to break, or when the materials are jammed between the breaking assembly 2 and the protrusion 5 during the breaking process, the stress distribution of the arc shape is more uniform, and it can bear greater load and is not easy to be damaged.

[0059] In some other embodiments, the tail of the protrusion 5 can also be formed as a blade, and the direction of the blade is opposite to the rotating direction of the breaking assembly 2, so as to increase the breaking effect.

[0060] In an exemplary embodiment, the hammer re-crusher with the integrated hammering and planing functions further comprises a first fixed blade group arranged along the self-rotation track circle of the breaking assembly 2, which comprises a first positioning member 6 and a plurality of fixed blades 7. The first positioning member 6 is fixedly connected to the inner wall of the casing 1, and the plurality of fixed blades 7 are arranged on the first positioning member 6 in a spaced manner, and the blade of each fixed blade 7 faces the breaking assembly 2.

[0061] In such an implementation, by arranging the fixed blade group along the self-rotation track circle of the breaking assembly 2, when the materials rotate with the breaking assembly 2, the breaking effect is increased by impacting the blades of the fixed blades 7. It should be noted that, since the screen 4 is arranged below the breaking assembly 2, the first fixed blade group is usually arranged in a surrounding manner on the left and right sides and above the breaking assembly 2.

[0062] According to the embodiments of the present disclosure, the first positioning member 6 is configured as an arc plate, and the arc plate is arranged on a circle that is concentric with the self-rotation track circle of the breaking assembly 2, so as to ensure that each fixed blade 7 can contact the materials.

[0063] In an exemplary embodiment, the breaking assembly 2 is arranged in a spaced manner along the horizontal direction, and the rotating directions of the two breaking assemblies 2 are opposite.

[0064] In such an implementation, the breaking cavities in the casing 1 also have left and right two parts. By arranging the rotating directions of the two breaking assemblies 2 to be opposite, when the materials in the left breaking cavity are thrown out with the rotation of the breaking assembly 2, the materials thrown out from the right breaking cavity can be received at the same time, so as to make the materials as evenly distributed as possible in the two breaking cavities, and improve the breaking efficiency.

[0065] In some other embodiments, the feeding port 11 and the discharging port 12 can also be arranged in two respectively.

[0066] According to embodiments of this disclosure, a first set of fixed blades is disposed above each crushing component 2. A second set of fixed blades is also disposed between the two crushing components 2, which includes a second positioning member 8 and a plurality of fixed blades 7. The second positioning member 8 is configured to be tangent to the rotation trajectory circles of the two crushing components 2 simultaneously, and the plurality of fixed blades 7 are disposed on the surface of the second positioning member 8 facing the crushing component 2.

[0067] Specifically, such as Figure 1 As shown, the second positioning member 8 is constructed in a "∧" shape, and the fixed blade 7 is disposed on the outside of the "∧" shape, i.e., on the surface facing the crushing component 2. In some other embodiments, the second positioning member 8 includes a left part and a right part, and the positions of the left and right parts tangent to the rotation trajectory circle can be appropriately adjusted. However, it should be noted that when the included angle between the left and right parts is small, if it is still set in a "∧" shape, the size of the second positioning member 8 may be too large. Therefore, it is necessary to appropriately shorten the length of the left and right parts and connect the left and right parts through an upwardly protruding arc-shaped part.

[0068] In an exemplary embodiment, the crushing assembly 2 includes a rotor 21 and a plurality of hammers 22. The rotor 21 is mounted on the housing 1 via a bearing seat. The plurality of hammers 22 are arranged at intervals along the circumferential direction on the rotor 21. The hammers 22 are configured to rotate relative to the rotor 21 under the action of centrifugal force to crush the material in one stage. In the one-stage crushing process, the material is crushed mainly by the impact force of the rotating hammers 22. Therefore, the one-stage crushing process is also the hammer crushing process.

[0069] More specifically, the rotor 21 includes a rotating shaft and multiple hammer discs. The rotating shaft is mounted on the housing 1 via bearing seats. The multiple hammer discs are evenly spaced along the axial direction of the rotating shaft and can rotate synchronously with the rotating shaft. The hammer discs 22 are provided with pin holes, and the pins are fixedly set between adjacent hammer discs. The hammer discs 22 are rotatably pinned between adjacent hammer discs through the pins, so that the hammer discs 22 can rotate relative to the hammer discs and work together with the fixed blades 7 to crush materials.

[0070] For example, the hammer blade 22 may be made of materials such as high manganese steel, alloy steel or low carbon alloy steel.

[0071] Figure 4 yes Figure 1 The exemplary embodiment shown is a three-dimensional structural diagram of the hammer blade. Figure 5 yes Figure 1 A planar schematic diagram of the hammer blade in the exemplary embodiment shown.

[0072] In some other embodiments, such as Figure 4 and Figure 5As shown, one end of the hammer piece 22 is provided with the pin hole, and the other end extends to both sides from the hammer piece body to form a wear-resistant part 221, the side surface 2211 of the wear-resistant part 221 is connected with the side surface 220 of the hammer piece body through a first inclined surface, and the side surface 2211 of the wear-resistant part 221 is connected with the end surface 2212 of the wear-resistant part 221 through a second inclined surface. Wherein, the included angle between the first inclined surface and the side surface 220 of the hammer piece body is 120°-135°, and the included angle between the second inclined surface and the side surface 2211 of the wear-resistant part 221 is 105°-120°.

[0073] In an exemplary embodiment, the driving assembly 3 comprises a motor 31 arranged outside the casing 1 and a belt 32, the motor 31 drives the crushing assembly 2 to rotate through the belt 32. In order to achieve the purpose of driving the rotor 21 to rotate at different speeds, the driving assembly 3 can be arranged as a speed reducer, or different speed adjustment purposes can be achieved by adjusting the diameter of the pulley and the diameter of the gear set.

[0074] In some other embodiments, the casing 1 is also provided with a material taking door 9 arranged at a position corresponding to the height of the screen 4, and the material taking door 9 is closed when the crushing assembly 2 normally rotates to crush the material. When the material is wet and difficult to crush, not only the screen 4 may be blocked, but also the rotation of the crushing assembly 2 may be affected, thereby causing damage to the equipment. In this case, the operation state of the equipment needs to be strictly monitored, and when an abnormality occurs, the equipment should be stopped, the material taking door 9 should be opened, and the screen 4 should be cleaned.

[0075] The above describes the embodiments of the present application. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present application. Although each embodiment is described above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present application is defined by the appended claims and their equivalents. Without departing from the scope of the present application, those skilled in the art can make various substitutions and modifications, which should fall within the scope of the present application.

Claims

1. A hammer refiner having a hammering and a planing integrated function, characterized by, The application relates to a crusher, which comprises: a casing (1) with a crushing cavity formed in the casing (1); a crushing assembly (2) arranged in the crushing cavity and rotatably mounted on the casing (1); a driving assembly (3) configured to drive the crushing assembly (2) to rotate so as to perform primary crushing on materials in the crushing cavity; a screen (4) arranged below the crushing assembly (2), the screen (4) being provided with a plurality of mesh holes (41) allowing only crushed materials of a target size to pass through, and a plurality of protrusions (5) being arranged on the screen (4), each of the protrusions (5) extending upwards from one end of an edge of the mesh hole (41) and extending towards the other end of the edge and forming a tail part, and an opening being formed between the tail part and the screen (4) and being communicated with the mesh hole (41), and the direction of each of the openings being opposite to the rotating direction of the crushing assembly (2) so that the materials are impacted by the tail part for secondary crushing under the driving of the crushing assembly (2).

2. The hammer mill according to claim 1, characterized in that The screen (4) is configured as an arc-shaped screen and is arranged along a rotation track circle of the crushing assembly (2).

3. The hammer mill according to claim 2, characterized in that The curvature of the arc-shaped screen is greater than or equal to pi / 2 rad.

4. The hammer mill according to claim 1, characterized in that The vertical section of the protrusion (5) along the extending direction of the protrusion (5) is configured as an arc shape.

5. The hammer mill according to claim 1, characterized in that The crusher further comprises a first fixed knife assembly arranged along the rotation track circle of the crushing assembly (2), and the first fixed knife assembly comprises: a first positioning member (6) fixedly connected to the inner wall of the casing (1); a plurality of fixed knives (7) arranged on the first positioning member (6) in a spaced manner, and the cutting edges of the fixed knives (7) being directed towards the crushing assembly (2).

6. The hammer mill according to claim 5, characterized in that The first positioning member (6) is configured as an arc-shaped plate, and the circumference of the arc-shaped plate is a concentric circle of the rotation track circle of the crushing assembly (2).

7. The hammer mill according to claim 5, characterized in that The crushing assembly (2) is arranged in a spaced manner along the horizontal direction, and the rotating directions of the two crushing assemblies (2) are opposite.

8. The hammer mill according to claim 7, characterized in that The first fixed knife assembly is arranged above each of the crushing assemblies (2). The crusher further comprises a second fixed knife assembly arranged between the two crushing assemblies (2), and the second fixed knife assembly comprises: a second positioning member (8) configured to be tangent to the rotation track circles of the two crushing assemblies (2) at the same time; a plurality of the fixed knives (7) arranged on the surface of the second positioning member (8) and directed towards the crushing assemblies (2).

9. The hammer mill according to any one of claims 1-5, characterized in that The crushing assembly (2) comprises: a rotor (21) mounted on the casing (1) through a bearing seat; a plurality of hammer pieces (22) arranged on the rotor (21) in a circumferential direction, and the hammer pieces (22) are configured to rotate relative to the rotor (21) under the action of centrifugal force so as to crush materials.

10. The hammer mill according to any one of claims 1-5, characterized in that The driving assembly (3) comprises: a motor (31) arranged outside the casing (1); a belt (32) through which the motor (31) drives the crushing assembly (2) to rotate.

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