A tree shredder shredding chamber introduction structure

Abstract

The application discloses a branch grinder crushing chamber guide-in structure, which comprises a crushing chamber, a fixed cutter, an inspection door, a crushing chamber frame, a discharge pipe and a grid type discharge guide plate. The fixed cutter is installed in the crushing chamber through fixed cutter fastening bolts. The crushing chamber is provided with the inspection door. One end of the crushing chamber is a branch rod inlet. The discharge pipe is communicated with the crushing chamber frame of the crushing chamber at the other end of the crushing chamber. The grid type discharge guide plate is arranged in the crushing chamber and located between the other end of the crushing chamber and the inspection door. The grid type discharge guide plate is arc-shaped. The extension direction of the grid type discharge guide plate is partially coincident with the cutting roller cutter rotary track circle formed by the cutter installed on the high-speed rotating cutting roller. The grid plate flared airflow guide-in structure makes the free air outside the crushing chamber have a smaller pressure difference when the free air is guided in. The machine tool operation is safe and reliable, is not adsorbed and blocked by foreign matters (light leaves, paper sheets and the like), the material crushing particle size is improved, and the storage and transportation loading density is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural production equipment, in particular to a branch shredder crushing chamber guide structure. BACKGROUND

[0002] China is both a large producer of wood and a large consumer of wood. Improving the utilization rate of wood production, developing wood processing industry, collecting forest harvesting residues, wood product factory processing residues and waste wood for papermaking and medium-high density fiberboard and particle board production, improving the comprehensive utilization rate of wood resources, and reducing the waste of wood resources, have important role and far-reaching significance for alleviating the contradiction between supply and demand of wood in China and meeting the demand of rapid economic growth for wood.

[0003] At present, the branch shredder branch rod crushing chamber in the market is prone to blockage risk and the phenomenon that the material discharge does not reach the predetermined area under the condition that the branch rod crown is fed and the cutting roller load is increased. The discharge speed and headroom have a large space for improvement, and the transportation cost is increased. SUMMARY

[0004] The purpose of the present application is to provide a branch shredder crushing chamber guide structure to improve the material crushing particle size, increase the storage and transportation loading density, and reduce the unit volume material transportation cost and blockage risk.

[0005] Technical scheme: A branch shredder crushing chamber guide structure, comprising a crushing chamber, a fixed knife, an access door, a crushing chamber frame, a discharge pipe and a grid type discharge guide plate. The fixed knife is installed in the crushing chamber through a fixed knife fastening bolt. The crushing chamber is provided with an access door. One end of the crushing chamber is a branch rod inlet. The discharge pipe is in communication with the crushing chamber frame at the other end of the crushing chamber. The grid type discharge guide plate is arranged inside the crushing chamber and located between the other end of the crushing chamber and the access door. The grid type discharge guide plate is arc-shaped. The extension direction of the grid type discharge guide plate is partially coincident with the cutting roller dynamic knife rotation track circle formed by the dynamic knife installed on the high-speed rotating cutting roller.

[0006] Further, the grid type discharge guide plate comprises a grid body, a front end discharge guide plate and a rear end discharge guide plate. The cross-sectional trajectory of the grid body is arc-shaped. The front end of the grid body is connected with the front end discharge guide plate, and the rear end of the grid body is connected with the rear end discharge guide plate. The lateral contour line of the whole formed by the three is partially coincident with the dynamic knife rotation track circle and is fixed with the crushing chamber respectively. The front end discharge guide plate is close to the access door, and the rear end discharge guide plate is close to the discharge pipe.

[0007] Further, the grid body comprises side plates, grid plates and nuts, the two side plates are parallel and spaced apart, and a plurality of grid plates are sequentially and spaced apart between the two side plates, and the two ends of each grid plate are fixed with a corresponding grid plate, and the lateral contour line of the whole formed by the plurality of grid plates arranged in sequence is a circular arc distributed with the center of rotation of the cutting roller.

[0008] Further, the cross section of the grid plate is a broken line, the bending angle is an obtuse angle and is arranged downward, and one of the broken line plates of the plurality of grid plates is sequentially arranged to form a circular arc.

[0009] Optimally, the number of grid plates is 4-8.

[0010] Optimally, the included angle A between the connecting line of the two end points of the circular arc formed by the plurality of grid plates and the horizontal line or the vertical line and the center point O of the rotation of the cutting roller is 0-20°.

[0011] Optimally, the included angle B between the two adjacent grid plates is 8-15°.

[0012] Optimally, the vertical spacing C between the two adjacent grid plates is 2-5 mm.

[0013] Optimally, the radial spacing D between the two adjacent grid plates is 8-16 mm.

[0014] Advantages: compared with the prior art, the advantages of the present application are: the flared airflow introduction structure of the grid plate makes the pressure difference smaller when the free air outside the crushing chamber is introduced, the machine tool operation is safe and reliable, and is not adsorbed and blocked by foreign matters (lightweight leaves, paper sheets, etc.); the airflow introduction amount during the material flow pushing is increased, the secondary impact frequency and probability of the material particles during the pushing process are increased, the material crushing particle size is improved, the storage and transportation loading density is increased, the unit volume material transportation cost and the blocking risk are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the present application;

[0016] Figure 2 is a structural schematic view of the grid body;

[0017] Figure 3 is Figure 2 the Y-Y sectional view;

[0018] Figure 4 is a material flow schematic view of the present application. DETAILED DESCRIPTION

[0019] The present application will be further illustrated below in combination with the drawings and specific embodiments, and it should be understood that these embodiments are only used to illustrate the present application and are not used to limit the scope of the present application.

[0020] A branch crusher crushing chamber introduction structure, such as Figures 1 to 4 As shown, it includes a crushing chamber 1, a fixed knife 2, an inspection door 3, a crushing chamber frame 4, a discharge pipe 5, and a grid-type discharge guide plate 6. The fixed knife 2 is installed in the crushing chamber 1 by a fixed knife fastening bolt 21. The crushing chamber 1 is provided with an inspection door 3, which is connected to the crushing chamber 1 by a connecting bolt and can be opened by rotating the fixed shaft 600 as a fulcrum during maintenance operations. One end of the crushing chamber 1 is a branch rod inlet, and the discharge pipe 5 is connected to the crushing chamber frame 4 of the crushing chamber 1 at the other end of the crushing chamber 1. The grid-type discharge guide plate 6 is arranged inside the crushing chamber 1 and is located between the other end of the crushing chamber 1 and the inspection door 3. The grid-type discharge guide plate 6 is arc-shaped, and the extension direction of the grid-type discharge guide plate 6 partially coincides with the rotating trajectory circle 100 of the cutting roller formed by the moving knife installed on the high-speed rotating cutting roller.

[0021] The grating-type discharge guide plate 6 comprises a grating body 61, a front-end discharge guide plate 62, and a rear-end discharge guide plate 63. The cross-sectional trajectory of the grating body 61 is arc-shaped, with its front end connected to the front-end discharge guide plate 62 and its rear end connected to the rear-end discharge guide plate 63. The lateral contour of the three components partially overlaps with the movable blade rotation trajectory circle 100 and is respectively fixed to the pulverizing chamber 1. The front-end discharge guide plate 62 is located near the inspection door 3, and the rear-end discharge guide plate 63 is located near the discharge pipe 5. The grating-type discharge guide plate 6 is designed in sections, with the front-end discharge guide plate 62 and the rear-end discharge guide plate 63 respectively welded to the pulverizing chamber 1. The grating body 61 is connected to the pulverizing chamber 1 via connecting bolts, making installation easy and the components highly manufacturable.

[0022] The grid body 61 comprises side plates 611, grid plates 612 and nuts 613. The two side plates 611 are parallel and spaced apart. The four to eight grid plates 612 are sequentially and spaced apart between the two side plates 611. The two ends of each grid plate 612 are fixed to the corresponding grid plate 612. The lateral contour line of the whole sequentially arranged grid plates 612 is a circular arc distributed around the rotation center of the cutting roller. The cross section of the grid plate 612 is a broken line. The bending angle of the broken line is an obtuse angle and is arranged downward. The one broken line plate of the plurality of grid plates 612 is sequentially arranged to form a circular arc. The included angle A between the connecting line of the two end points of the circular arc formed by the plurality of grid plates 612 and the rotation center point O of the cutting roller and the horizontal line or the vertical line is 0°-20°. The included angle B between the two adjacent grid plates 612 is 8°-15°. The vertical spacing C between the two adjacent grid plates 612 is 2 mm-5 mm. The radial spacing D between the two adjacent grid plates 612 is 8 mm-16 mm. The grid body 61 can also remove the side plates 611, and the grid plates 612 are directly positioned and connected with the crushing chamber 1 by welding. The flared airflow introduction structure of the grid plate 611 makes the pressure difference smaller when the free air outside the crushing chamber is introduced, and the machine tool is safe and reliable in operation and is not adsorbed and blocked by foreign matters (lightweight leaves, paper sheets, etc.).

[0023] As shown in Figure 4 , the branch rod material is fed in the left arrow direction. The cutting roller cutter 200 installed on the high-speed rotating cutting roller forms a cutting roller cutter rotation track circle 100. The branch rod material is milled and crushed with the fixed cutter 2. The material moves in the closed chamber of the crushing chamber 1, that is, between the grid type discharge guide plate 6 and the cutting roller surrounding plate 500. Under the action of the centrifugal force of the material and the airflow generated by the high-speed rotation of the cutting roller cutter, the material is discharged along the crushing chamber frame 4 and the discharge pipe 5.

[0024] As shown in Figure 4 , the left arrow is the entering direction of the branch rod material. The cutter 200 installed on the cutting roller plays the role of a scraper and a conveyor for the mixture of the material and the air. Under the high-speed rotation, the mixture of the milled material and the air brought by the material cavity 300 is discharged along the set track under the centrifugal force at E and the guidance of the material guide plate 400, and the set lift is met.

[0025] As shown in Figure 4 , the airflow introduction is an open system (not taking into account energy conversion). The physical properties of the air movement viscosity are used. The free air continuity is followed. The relatively semi-closed cutting roller cutter rotates at high speed along the installation axis. The fixed cutter supports the cutting roller cutter to mill and crush the fed branch rod. At the same time, a high-speed airflow is formed. The mixture flow is formed in the guide section of the discharge guide plate. Figure 2 , 3As shown in the grid format airflow introduction structure, the free air outside the crushing chamber joins the mixture flow in the preset trajectory and angle under the attraction of the high-speed airflow inside, that is, the airflow increases. Therefore, under the condition that the rotating speed of the cutting roller is relatively constant and the cross-section of the material flow channel is unchanged, the mixture flow is formed as shown in the attached Figure 4 The E area shown has a higher initial speed, ensuring that the discharge lift is farther, greatly reducing the risk of blockage; at the same time, the addition of normal temperature airflow cools the moving knife edge (air cooling), and the service life of the moving knife is longer.

[0026] Similarly, the grid format airflow introduction structure adds free air outside the crushing chamber to the mixture flow in the discharge guide plate area inside the crushing chamber, which reduces the filling coefficient of the mixture flow, reduces the frequency and probability of collision between the cut materials and the friction on the guide channel surface, and obtains a lower friction coefficient, so that the mixture flow is formed as shown in the attached Figure 4 The E area shown has a higher initial speed, ensuring that the discharge lift is farther, greatly reducing the risk of blockage.

[0027] Similarly, the grid format airflow introduction structure adds free air outside the crushing chamber to the mixture flow in the discharge guide plate area inside the crushing chamber, which gives the tree slices in the mixture flow a component force brought by the addition of external free air along the predetermined trajectory and angle, providing more abundant impact space and frequency for the moving knife operating at high speed, thereby quickly tearing the wood fiber particles after cutting, obtaining finer and more uniform material particles, improving material fragmentation granularity, increasing storage and transportation loading density, reducing unit volume material transportation cost and blockage risk.

[0028] The grid format airflow introduction structure increases the airflow introduction amount during material flow pushing, increases the secondary impact frequency and probability of material particles during the pushing process, improves material fragmentation granularity, increases storage and transportation loading density, reduces unit volume material transportation cost and blockage risk. Make full use of the incompressibility and continuity of fluid, coupled with the operation principle of the branch shredder, realize the double action of crushing and flow guiding, so that the mixture flow formed in the guide section of the discharge guide plate has more abundant mechanism. Due to the complexity and diversity of actual action, this patent specification does not describe in detail, and has practical significance and operation stability and other technical features.

[0029] The branch shredder (crushing) is defined according to the standard terms in GB / T19365 "Mobile and self-propelled forestry machinery terms, definitions and classification of forestry machinery": The operation of changing trees, shrubs or branches into small pieces through tearing, slicing, impacting or shearing. The action nouns "tear, cut, impact or shear" in the definition are all knife blades, including moving knife blades (installed on the cutting roller) and fixed knife blades (installed on the crushing chamber), material pushing carrier, and airflow for the opening system. This structure is based on this.

Claims

1. A branch crusher crushing chamber inlet structure, characterized by: The invention comprises a crushing chamber (1), a fixed knife (2), an inspection door (3), a crushing chamber frame (4), a discharge pipe (5), and a grid-type discharge guide plate (6). The fixed knife (2) is installed in the crushing chamber (1) through a fixed knife fastening bolt (21). The crushing chamber (1) is provided with an inspection door (3). One end of the crushing chamber (1) is a branch rod inlet. The discharge pipe (5) is connected to the crushing chamber frame (4) of the crushing chamber (1) at the other end of the crushing chamber (1). The grid-type discharge guide plate (6) is arranged inside the crushing chamber (1) and is located between the other end of the crushing chamber (1) and the inspection door (3). The grid-type discharge guide plate (6) is arc-shaped. The extension direction of the grid-type discharge guide plate (6) partially coincides with the rotating trajectory of the cutting roller formed by the moving knife installed on the high-speed rotating cutting roller. The grid type discharge guide plate (6) comprises a grid body (61), a front end discharge guide plate (62), and a rear end discharge guide plate (63). The cross-sectional trajectory of the grid body (61) is arc-shaped, the front end of the grid body is connected to the front end discharge guide plate (62), and the rear end is connected to the rear end discharge guide plate (63). The lateral contour line of the whole formed by the three overlaps with the circular part of the rotating trajectory of the movable knife and is respectively fixed to the crushing chamber (1). The front end discharge guide plate (62) is close to the maintenance door (3), and the rear end discharge guide plate (63) is close to the discharge pipe (5). The grille body (61) includes side plates (611), grid plates (612), and nuts (613). Two side plates (611) are provided in parallel and spaced apart. A plurality of grid plates (612) are arranged in sequence and spaced apart between the two side plates (611). Both ends of each grid plate (612) are fixed to a corresponding grid plate (612). The lateral contour line of the whole formed by the plurality of grid plates (612) arranged in sequence is an arc shape distributed around the rotation center of the cutting roller. The cross section of the grid plate (612) is in the shape of a broken line, and its bending angle is an obtuse angle and is arranged downward. One of the broken line plates of the plurality of grid plates (612) is arranged in sequence to form an arc shape.

2. The branch chipper crushing chamber inlet structure according to claim 1, characterized in that: The number of grid plates (612) is 4 to 8.

3. The branch chipper crushing chamber inlet structure according to claim 1, characterized in that: The angle A between the two end points of the circular arc formed by the plurality of grid plates (612) and the line connecting the rotating center point O of the cutting roller and the horizontal line or the vertical line is 0° to 20°.

4. The branch chipper crushing chamber inlet structure according to claim 1, characterized in that: The included angle B between two adjacent grid plates (612) is 8° to 15°.

5. The branch chipper crushing chamber inlet structure according to claim 1, characterized in that: The vertical spacing C between two adjacent grid plates (612) is 2 mm to 5 mm.

6. The branch chipper crushing chamber inlet structure according to claim 1, characterized in that: The radial distance D between two adjacent grid plates (612) is 8 mm to 16 mm.

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