Double-air-hammer-piece self-suction type crushing machine

Abstract

The invention discloses a double-air-hammer-piece self-suction type crushing and crushing machine which comprises a feeding and crushing bin arranged at one end of a shell and used for feeding materials in a self-suction mode and pre-crushing the materials; comprising a crushing impeller installed on a main shaft, the crushing impeller is arranged in a feeding crushing bin, a plurality of stirring teeth are arranged on the upper edge and the outer edge of a crushing blade of the crushing impeller, and a plurality of groups of rubbing teeth which are mutually matched with the stirring teeth are fixedly installed on the bin wall; a feeding window is formed in the bin wall connected with the smashing bin, and a feeding suction opening is formed in the bin wall located on the outer side. According to the structure, stirring teeth and rubbing teeth are arranged on a crushing impeller of the feeding crushing bin, efficient pre-crushing, namely preliminary crushing is immediately carried out while feeding materials are sucked, and feeding materials are conveyed to the crushing bin; therefore, the efficient crushing and re-crushing step sequential treatment is achieved, and the functional characteristics of being high in crushing efficiency, smooth, free of blockage, continuous and stable are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery equipment, mainly a crusher, specifically a double wind hammer blade self-priming crushing crusher. Background Art

[0002] A feed crusher is a device specifically used for crushing feed raw materials. It is widely used in industries such as livestock and poultry farming, poultry farming, and feed processing plants. The main function of a feed crusher is to crush feed raw materials so that livestock and poultry can digest and absorb them more easily. Crushers usually use mechanical force and the principle of grinding and cutting to cut and break feed raw materials into appropriately sized particles. Feed crushers can be classified into various types according to their working principles and structures, such as shear type, impact type, grinding type, etc. According to their functions and processing capacities, crushers can also be divided into household type, small commercial type, industrial type, etc. Feed crushers are an indispensable part of the feed processing industry. They can help farmers and breeders improve the utilization efficiency of feed, reduce costs, and increase breeding benefits.

[0003] Currently, the hammer blade type feed crusher is a common type of feed crusher. Its working principle is to use high-speed rotating hammer blades to break feed raw materials. The hammer blade type feed crusher has a fast processing speed and can efficiently process a large amount of feed raw materials. The hammer blade type feed crusher is suitable for crushing a variety of different materials, including grains, hay, corn straw, etc. Through the high-speed collision, impact, and shearing actions of the hammer blades, the hammer blade type feed crusher can evenly and finely crush feed raw materials to produce uniform granular feed. However, existing hammer blade type feed crushers usually complete the crushing in a single crushing chamber and can only discharge materials through a sieve plate after being crushed to a certain particle fineness. Currently, such crushers have problems of low processing efficiency, high energy consumption and large horsepower requirements, and are prone to wear. Once the wear degree is large or the efficiency is insufficient, it often causes problems such as low efficiency and even material discharge blockage. For example: Chinese Patent CN220634567U, a strong suction type hammer blade crusher, records a single chamber crushing structure, which has little significance and cannot improve efficiency. Summary of the Invention

[0004] To solve the problems and defects existing in the above-mentioned prior art, after research and design by the inventor, a new structure of double wind hammer blade self-priming crushing crusher is now provided. It has an efficient pre-crushing and re-crushing structure, has efficient, smooth and continuous stable functions, and has a reasonable structural design, which is easy to use and practical. Specifically, the present invention is implemented as follows:

[0005] A double wind hammer blade self-priming crushing crusher includes a frame, a housing placed on the frame, a main shaft placed in the housing, a crushing cutter head and hammer blades installed on the main shaft. A transmission belt wheel is provided at the end of the main shaft, and the transmission belt wheel is used for driving connection with a power motor to drive the main shaft to rotate;

[0006] The feeding and crushing bin is arranged at one end of the housing and is used for self-priming feeding of materials and pre-crushing; it includes a crushing impeller mounted on the main shaft, the crushing impeller is placed in the feeding and crushing bin, and a number of stirring teeth are arranged on the upper edge and outer edge of the crushing blades of the crushing impeller, and a number of groups of rubbing teeth that cooperate with the stirring teeth are fixedly installed on the bin wall; a feeding window is opened on the bin wall connecting the pulverizing bin, and a feeding suction port is opened on the outer bin wall.

[0007] The pulverizing bin is arranged in the housing and is used for re-pulverizing the pre-crushed materials and passing through the sieve plate into the discharging bin; it includes a number of groups of pulverizing cutter discs and hammer pieces mounted on the main shaft.

[0008] The discharging bin is arranged inside or outside the housing and is connected to the pulverizing bin through a discharging channel, and is used for pushing and conveying the materials in the discharging channel towards the discharging port for discharging; it includes a discharging impeller mounted on the main shaft and is provided with a discharging port.

[0009] Introduction to the working principle of the present invention: The double wind hammer piece self-priming crushing and pulverizing machine of the present invention is composed of a frame, a housing, a main shaft, a pulverizing cutter disc and hammer pieces. The transmission belt pulley connects the main shaft and the power motor, and drives the rotation of the pulverizing cutter disc and the hammer pieces by rotating the main shaft. The key lies in that there are also provided a feed crushing bin for pre-crushing, a pulverizing bin for re-pulverizing and a discharge bin; after the crushing impeller in the feed crushing bin rotates with the main shaft, a negative pressure suction is generated in the bin body, and the material can be sucked into the pulverizer through the self-priming design of the feed crushing bin; stirring teeth are arranged on the crushing impeller in the feed crushing bin, and cooperate with the rubbing teeth on the bin wall, so that after the material enters, it is first collided and torn under the interaction of the stirring teeth and the rubbing teeth on the crushing impeller to achieve pre-crushing. Since the distance between the stirring teeth and the rubbing teeth is set appropriately, materials such as corn are cut into small pieces and broken pieces by the sharp stirring teeth and rubbing teeth during the high-speed rotation process. After the crushing is completed, it enters the pulverizing bin through the feed window for re-pulverizing. After the material enters the pulverizing bin, it is re-pulverized by several groups of pulverizing cutter discs and hammer pieces. The large teeth and small teeth on the pulverizing cutter disc are arranged regularly, and the auxiliary shaft and the hammer pieces are hung on the pulverizing cutter disc. The pulverizing cutter disc and the hammer pieces uniformly and finely pulverize the material through the rotation of the main shaft. The pulverized material enters the discharge channel through the sieve plate. The discharge bin generates an inward suction and an outward pushing wind force due to the rotation of the discharge impeller, so that the material fragments entering the discharge channel are sucked into the discharge impeller and pushed into the discharge port to realize the conveying and discharging of the material; in the above-mentioned pre-crushing process, mainly by using the speed-up process of the high-speed rotation in the early stage after the material enters, the initial collision and fragmentation are carried out immediately. Due to the use of the tooth-to-tooth cooperation structure, the corn grain-shaped material is cut into several small granular pieces. After that, the small particles start to be quickly sprinkled outward due to the change of their own weight, so they can immediately enter the feed window. The newly entered corn grains are heavier in weight, so they will first contact the crushing impeller in the area close to the shaft, and after being crushed, they gradually move outward. Then, through the dynamic and static collision cutting of the stirring teeth and the rubbing teeth, they are quickly split and crushed and sprinkled and moved to the outer edge area, and finally enter the pulverizing bin. This process is relatively fast and there is no hammer piece knocking, and the crushing particle size of the material will not be too small and too broken. This continuous and fast primary crushing structure smoothly and efficiently completes the function of primary crushing, and at the same time realizes continuous feeding and supplying to the pulverizing bin. The materials in the pulverizing bin are all small particle materials, and under the action of the pulverizing cutter disc and the hammer pieces, it can be more efficient and stable, and there will be no sieve plate blockage and material accumulation, so as to realize fast and continuous pulverizing work, which is very suitable for the self-priming feeding method. In addition, the design of the feed window and the movable baffle can control the material flow rate and realize the opening and closing of the feed window. The sieve plate at the bottom of the pulverizing bin can be replaced to facilitate the selection of the sieve plate for the pulverizing fineness. The discharge bin can adopt an internal fan structure or an external fan structure, which increases the applicability, and the external shape structure can meet the needs of users with different preferences. The upper half of the housing is a hinged and openable structure, which is convenient for maintenance and cleaning work.The feed opening is equipped with a feed chute and an opening and closing plug plate facing outward, so that the feed can be fed in a conventional manner when processing straw, straw or other feed.

[0010] The beneficial technical effects of the present invention are introduced as follows:

[0011] 1. Self-priming feeding and efficient pre-crushing: By setting stirring teeth and kneading teeth on the crushing impeller of the feed crushing bin, the negative pressure suction generated by high-speed rotation is used to realize self-priming feeding of materials without external assistance, thereby improving feeding efficiency and work efficiency. At the same time, after the materials are sucked in, they are quickly crushed under the action of the crushing impeller, that is, preliminary crushing, and the feeding and throwing and conveying to the crushing bin are realized;

[0012] 2. Re-crushing: The materials entering the crushing bin are small particles with similar sizes. The combination of the crushing disc and hammers can achieve fast and efficient crushing of the materials, ensuring a fine and uniform crushing effect with high efficiency. The large and small teeth on the crushing disc are regularly arranged, and the auxiliary shaft and hammers are mounted on the crushing disc. The rotation of the main shaft can crush the materials evenly and finely, improving the crushing efficiency and smoothness, and avoiding blockage and material accumulation.

[0013] 3. Continuous operation: The optimized crushing structure allows the material to quickly enter the crushing bin, which can achieve continuous feeding and supplying. The hammer is only installed in the crushing bin to achieve reasonable classification of the material and avoid excessive crushing of the material during the pre-crushing process. It is the key to the subsequent high and continuous crushing process.

[0014] 4. Convenient maintenance: The upper part of the shell is a hinged structure, which is convenient for maintenance and cleaning, and improves the reliability and maintainability of the equipment. Primary crushing is the link that causes the most concentrated wear of the equipment. In the design of the present invention, only one component, the crushing impeller, needs to be replaced, which avoids the number of traditional replacements of the entire machine, saves replacement costs and extends the service life of core components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is one of the three-dimensional diagrams of a double-air hammer self-priming crushing mill of the present invention;

[0016] Figure 2 The second is a three-dimensional diagram of a double-air hammer self-priming crushing mill of the present invention;

[0017] Figure 3 It is a front view of the upper shell structure of the present invention;

[0018] Figure 4 A bottom-up stereoscopic view of the upper shell structure of the present invention;

[0019] Figure 5Top view perspective view of the upper housing structure of the present invention;

[0020] Figure 6 Bottom view of the internal structure of the upper housing of the present invention;

[0021] Figure 7 Perspective view of the internal structure of a double wind hammer blade self - suction type crushing and pulverizing machine of the present invention;

[0022] Figure 8 Perspective view of the main shaft and core cutter disc assembly of a double wind hammer blade self - suction type crushing and pulverizing machine of the present invention;

[0023] Figure 9 Top view of the internal structure of a double wind hammer blade self - suction type crushing and pulverizing machine of the present invention;

[0024] Figure 10 Schematic diagram of the internal structure of the crushing chamber of a double wind hammer blade self - suction type crushing and pulverizing machine of the present invention;

[0025] Figure 11 Front view of the internal structure of a double wind hammer blade self - suction type crushing and pulverizing machine of the present invention;

[0026] Figure 12 Schematic diagram of the structure in the working state of a double wind hammer blade self - suction type crushing and pulverizing machine of the present invention;

[0027] Figure 13 Perspective view of the structure of a double wind hammer blade self - suction type crushing and pulverizing machine in Embodiment 2 of the present invention;

[0028] Figure 14 Internal structure display diagram of a double wind hammer blade self - suction type crushing and pulverizing machine in Embodiment 2 of the present invention;

[0029] Figure 15 Schematic diagram of the structure of the external discharge bin feed channel of a double wind hammer blade self - suction type crushing and pulverizing machine in Embodiment 2 of the present invention;

[0030] Where:

[0031] 1 - frame, 11 - belt pulley, 12 - housing, 13 - main shaft, 14 - bearing seat;

[0032] 2 - feed crushing chamber, 21 - turntable, 22 - ring plate structure, 23 - crushing impeller, 24 - stirring teeth, 25 - rubbing teeth, 26 - feed window, 27 - feed suction port, 28 - suction bellows, 29 - self - suction barrel;

[0033] 3 - pulverizing chamber, 31 - pulverizing cutter disc, 32 - hammer blades, 33 - sieve plate, 34 - auxiliary shaft, 35 - crushing rack, 36 - movable baffle, 37 - adjusting knob, 38 - damping chute;

[0034] 4 - Discharge bin, 41 - Discharge channel, 42 - Discharge impeller, 43 - Discharge port;

[0035] 5 - Feed opening, 51 - Feed chute, 52 - Opening and closing plug plate. Detailed implementation manner

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0037] Example 1: A double wind hammer piece self-priming crushing and pulverizing machine, as Figure 1-12 shown, includes a frame 1, a housing 12 placed on the frame 1, a main shaft 13 placed inside the housing 12, a crushing cutter head 31 and hammer pieces 32 installed on the main shaft 13, a transmission pulley 11 is provided at the end of the main shaft 13, and the transmission pulley 11 is used for driving connection with a power motor to drive the main shaft 13 to rotate;

[0038] The feed crushing bin 2 is provided at one end of the housing 12 for self-priming feeding of materials and pre-crushing; it includes a crushing impeller 23 installed on the main shaft 13, the crushing impeller 23 is placed inside the feed crushing bin 2, and a number of stirring teeth 24 are provided on the upper edge and outer edge of the crushing blades of the crushing impeller 23, and a number of groups of rubbing teeth 25 that cooperate with the stirring teeth 24 are fixedly installed on the bin wall; a feed window 26 is opened on the bin wall connecting to the crushing bin 3, and a feed suction port 27 is opened on the outer bin wall;

[0039] The crushing bin 3 is provided inside the housing 12 for re-crushing the pre-crushed materials and passing through the sieve plate 33 into the discharge bin 4; it includes a number of groups of crushing cutter heads 31 and hammer pieces 32 installed on the main shaft 13;

[0040] The discharge bin 4 is provided inside or outside the housing 12 and is connected to the crushing bin 3 through the discharge channel 41 for pushing and conveying the materials in the discharge channel 41 in the direction of the discharge port 43 for discharging; it includes a discharge impeller 42 installed on the main shaft 13 and a discharge port 43 is provided. A suction bellows 28 is sleeved and installed at the feed suction port 27, and a self-priming barrel 29 is provided at the end of the suction bellows 28.

[0041] During use, install the motor below or outside the frame 1. Put a suitable drive belt around the output rotating shaft of the motor and the drive pulley 11. Check whether the components of all parts of the equipment are installed completely and firmly. Cover the housing 12. Install the discharge pipe, the suction bellows 28, the self-suction hopper 29 and the material. In this embodiment, corn kernels are taken as an example. Pack them in bags and place them on one side of the crusher. Sleeve and fix the end of the suction bellows 28 on the feed suction port 27, and insert the self-suction hopper 29 at the other end into the corn kernel bag. Start the motor. The motor drives the main shaft 13 to rotate, and the whole crusher operates. After the crushing impeller 23 rotates, it generates suction, blows air into the crushing chamber 3, and at the same time sucks the corn kernels into the feed suction pipe and sucks them into the feed crushing chamber 2 from the feed suction port 27. After the crushing impeller 23 in the feed crushing chamber 2 rotates with the main shaft 13, a negative pressure suction is generated in the chamber body, and the material can be sucked into the crusher through the self-suction design of the feed crushing chamber 2; stirring teeth 24 are arranged on the crushing impeller 23 in the feed crushing chamber 2 and cooperate with the rubbing teeth 25 on the chamber wall. After the material enters, it first collides and tears under the interaction of the stirring teeth 24 and the rubbing teeth 25 on the crushing impeller 23 to achieve pre-crushing. Since the distance between the stirring teeth 24 and the rubbing teeth 25 is set appropriately, materials such as corn are chopped into small pieces and broken pieces by the sharp stirring teeth 24 and rubbing teeth 25 during the high-speed rotation process. After the crushing is completed, it enters the crushing chamber 3 through the feed window 26 for further crushing. After the material enters the crushing chamber 3, it is further crushed by several groups of crushing cutter discs 31 and hammer pieces 32.

[0042] During this process, when the corn kernels enter through the feed crushing chamber 2 of the double-air-hammer-piece self-suction type crushing mill, they will be attracted by the negative pressure suction generated by the crushing impeller 23 and sucked into the machine interior.

[0043] After entering the machine, the corn kernels will encounter the stirring teeth 24 on the crushing impeller 23 and the rubbing teeth 25 on the bin wall. These two parts cooperate with each other to apply force to the corn kernels, causing the corn kernels to collide and tear under the interaction of the stirring teeth 24 and the rubbing teeth 25, achieving pre-crushing. After the pre-crushing is completed, the corn kernels become small pieces and broken pieces. They enter the crushing bin 3 through the feed window 26 for further crushing. Inside the crushing bin 3, they will encounter a crushing device composed of several groups of crushing cutter discs 31 and hammer pieces 32. Driven by the main shaft 13, these blades and hammer pieces 32 rotate to perform secondary impact crushing on the small pieces and broken pieces of corn, further crushing them into smaller particles. After the crushing is completed, these small corn particles will enter the discharge channel 41 through the sieve plate 33 and then be sent into the discharge bin 4. Inside the discharge bin 4, the rotation of the discharge impeller 42 generates an inward suction and outward pushing wind force, sucking these small particles into the discharge impeller 42 and pushing them into the discharge port 43. Finally, after a period of rotation and crushing process, the originally intact corn kernels are split into several small granular pieces and finally conveyed out of the machine through the discharge port 43, completing the entire change process from granular to particulate. This process is both fast and continuous, enabling the crushing task to be completed smoothly and efficiently.

[0044] Preferably, the crushing impeller 23 includes a turntable 21 and an annular plate structure 22. The annular plate structure 22 is on the side closer to the feeding direction. A number of stirring teeth 24 are also provided on the edge of the turntable 21 and the inner and outer edges of the annular plate structure 22. The side edge of the crushing blade gradually inclines inwards from the outside to the inside to form a bevel structure, so that the material entering from the feed suction port 27 can directly enter the crushing impeller 23 and contact the stirring teeth 24. The annular plate structure 22 and the beveled crushing blade structure together form an inwardly concave space. The corn kernels entering from the feed suction port 27 can smoothly enter the crushing impeller 23 and will first contact the stirring teeth 24 on the bevel or the annular plate structure 22 of the crushing impeller 23. The distance between the bin wall of the feed crushing bin 2 and the crushing impeller 23 is set so that the gap between the stirring teeth 24 on the end edge of the crushing blade and the rubbing teeth 25 installed on the top bin wall of the feed crushing bin 2 is controlled between 3-8 mm. The rubbing teeth 25 are arranged horizontally in several pieces, and the length of each group is adapted to the thickness of the crushing impeller 23. Being cut and ruptured and pushed to move, during the high-speed rotation process, the corn kernels will immediately be thrown up and contact the rubbing teeth 25, forming multiple collisions and cuttings, causing the rapid splitting and fragmentation of the corn kernels into small particles. It is difficult for the shredded small particles to be further shredded by the rubbing teeth 25 and the stirring teeth 24, but they will be quickly scattered to the outer edge part along with the airflow, that is, enter the feed window 26 and enter the crushing bin 3.

[0045] Preferably, a number of groups of crushing cutter discs 31 and hammer pieces 32 are installed in the crushing bin 3. The crushing cutter discs 31 are in the shape of cutter teeth regularly arranged with large teeth and small teeth. A number of auxiliary shafts 34 are installed through the crushing cutter discs 31, and a number of hammer pieces 32 are movably hung on the auxiliary shafts 34; a number of stirring teeth 24 are also provided on the edges of the hammer pieces 32; a number of crushing rack bars 35 are transversely installed along the length direction on the upper wall and side wall of the crushing bin 3. The sharp blades and sharper tips on the crushing cutter discs 31, combined with the knocking of the hammer pieces 32, enable small particles to be quickly further crushed into finer powdery materials;

[0046] Preferably, on the bin wall between the feeding and crushing bin 2 and the crushing bin 3, a movable baffle 36 is installed at the feeding window 26 on the inner side of the crushing bin 3. One end of the movable baffle 36 is hinged to the bin wall and extends to the outside of the feeding and crushing bin 2 through a connecting rod. The outer end of the connecting rod is connected to an adjusting knob 37, and the other end is connected to the movable baffle 36. The edge of the movable baffle 36 is placed in a damping chute 38 installed on the bin wall. Turning the adjusting knob 37 can drive the movable baffle 36 to rotate along the damping chute 38 to control its full or partial opening of the feeding window 26, so as to adjust and control the material flow rate entering the crushing bin 3, or close the feeding window 26. According to different motor models, the rotation speed of the crusher will be different, resulting in different feeding amounts and crushing efficiencies. If they do not match each other, there will be a situation where the material is blocked and not flowing smoothly. The design of the movable baffle 36 can well adjust and control the amount of material entering the crushing bin 3 to achieve control and adjustment. Or in another embodiment, when it is not necessary to crush granular materials such as corn, but to process other shaped materials such as straw and hay, and self-priming feeding is not required, the movable baffle 36 can be closed and used as a traditional crusher. At this time: the upper half of the housing 12 is designed to be hinged and openable. The housing 12 is provided with a feeding opening 5 above the crushing bin 3. A feeding chute 51 is installed outward on the feeding opening 5, and an opening and closing plug board 52 is installed outside the feeding opening 5. Open the feeding opening 5, put the material into the feeding chute 51 and gradually slide it into the crushing bin 3. At this time, the opening and closing plug board 52 is in the removed state. If self-priming processing of granular materials is to be used, note that the opening and closing plug board 52 needs to be closed.

[0047] In this embodiment, when it is necessary to control the fineness of the crushed material, a sieve plate 33 with a corresponding mesh number can be selected. The sieve plate 33 is installed at the bottom of the crushing bin 3 in a replaceable drawer installation manner, and is in a semi-circular arc surface structure. The radian is adapted to the rotation radian of the crushing cutter disc 31. A slot for installing the sieve plate 33 is provided at the bottom of the crushing bin 3; the discharge channel 41 is arranged below the sieve plate 33 and communicates with the discharge bin 4.

[0048] When the discharge bin 4 is of an internal fan structure, it is located at the other end of the crushing bin 3 and is placed inside the housing 12. The discharge channel 41 extends from the bottom to the outside below the discharge bin 4 and enters the discharge bin 4 from the outside. The outer side edge of the blade of the discharge impeller 42 is a bevel structure that gradually converges from the outside to the inside, facilitating the inhalation of materials. The discharge port 43 is located at the top of the discharge bin 4 and can be butt-connected to install a discharge pipe.

[0049] Embodiment 2 is different from the internal fan structure in Embodiment 1. As Figure 13-14 shown, this crusher can also be used. When it is of an external fan structure, it is located outside the bearing seat 14 outside the crushing bin 3. The discharge bin 4 is arranged between the bearing seat 14 and the belt pulley 11. The discharge channel 41 is directly connected from the bottom to the inside below the discharge bin 4 and enters the discharge bin 4 from the inside. The inner side edge of the blade of the discharge impeller 42 is a bevel structure that gradually converges from the outside to the inside, facilitating the inhalation of materials. The discharge port 43 is located at the top of the discharge bin 4 and can be butt-connected to install a discharge pipe.

[0050] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A double-air hammer self-priming crushing mill, comprising a frame (1), a shell (12) placed on the frame (1), a main shaft (13) placed in the shell (12), a crushing cutter disc (31) and hammers (32) mounted on the main shaft (13), a transmission pulley (11) is provided at the end of the main shaft (13), and the transmission pulley (11) is used for transmission connection with a power motor to drive the main shaft (13) to rotate; characterized in that Also included are: The feeding and crushing bin (2) is arranged at one end of the housing (12) and is used for self-priming feeding and pre-crushing of materials; it comprises a crushing impeller (23) mounted on a main shaft (13); the crushing impeller (23) is placed in the feeding and crushing bin (2); a plurality of stirring teeth (24) are arranged on the upper edge and outer edge of the crushing blade of the crushing impeller (23); a plurality of groups of kneading teeth (25) cooperating with the stirring teeth (24) are fixedly mounted on the bin wall; a feeding window (26) is provided on the bin wall connected to the crushing bin (3); a feeding suction port (27) is provided on the bin wall located on the outer side; The crushing bin (3) is arranged in the housing (12) and is used to crush the pre-crushed material again and pass the sieve plate (33) into the discharge bin (4); it comprises a plurality of crushing blades (31) and hammers (32) mounted on the main shaft (13); A discharge bin (4) is arranged inside the housing (12) or outside the housing (12), connected to the crushing bin (3) via a discharge channel (41), and is used to push the material in the discharge channel (41) toward the discharge port (43) for discharge; and comprises a discharge impeller (42) mounted on the main shaft (13), and provided with a discharge port (43).

2. A double-air hammer self-priming crushing mill according to claim 1, characterized in that: The crushing impeller (23) comprises a rotating disc (21) and an annular sheet structure (22), wherein the annular sheet structure (22) is disposed on the side close to the feeding direction, and a plurality of stirring teeth (24) are also disposed on the edge of the rotating disc (21) and the inner and outer edges of the annular sheet structure (22), and the side edges of the crushing blades are gradually inwardly inclined from the outside to the inside to form a bevel structure, so that the material entering from the feeding suction port (27) can directly enter the crushing impeller (23) and contact the stirring teeth (24).

3. A double-air hammer self-priming crushing mill according to claim 1 or 2, characterized in that: The spacing between the wall of the feed crushing bin (2) and the crushing impeller (23) is set so that the gap between the stirring teeth (24) on the end edge of the crushing blade and the kneading teeth (25) installed on the top wall of the feed crushing bin (2) is controlled to be between 3 and 8 mm, and the kneading teeth (25) are arranged in a horizontal arrangement of a plurality of pieces, and the length of each group is adapted to the thickness of the crushing impeller (23).

4. A double-air hammer self-priming crushing mill according to claim 1, characterized in that: A plurality of groups of crushing blade discs (31) and hammers (32) are installed in the crushing bin (3); the crushing blade disc (31) is in the shape of blade teeth with large teeth and small teeth regularly arranged and distributed; a plurality of auxiliary shafts (34) are installed through the crushing blade disc (31); a plurality of hammers (32) are movably mounted on the auxiliary shafts (34); a plurality of stirring teeth (24) are also provided on the edges of the hammers (32); and a plurality of crushing racks (35) are installed transversely along the length direction on the upper wall and the side wall of the crushing bin (3).

5. The double-air hammer self-priming crushing mill according to claim 1, characterized in that: A movable baffle (36) is installed on the wall between the feed crushing bin (2) and the crushing bin (3) at the feed window (26) on the inner side of the crushing bin (3). One end of the movable baffle (36) is hingedly installed on the bin wall and extends to the outer side of the feed crushing bin (2) through a connecting rod. The outer end of the connecting rod is connected to an adjusting knob (37), and the other end is connected to the movable baffle (36). The edge of the movable baffle (36) is placed in a damping slide groove (38) installed on the bin wall. Turning the adjusting knob (37) can drive the movable baffle (36) to rotate along the damping slide groove (38) to control it to fully or partially open the feed window (26) to adjust and control the material flow entering the crushing bin (3), or to close the feed window (26).

6. A double-air hammer self-priming crushing mill according to claim 4, characterized in that: The sieve plate (33) is installed at the bottom of the crushing bin (3) in a replaceable pull-out installation manner, and has a semicircular arc surface structure, the arc of which is compatible with the rotation arc of the crushing blade disc (31). A slot for installing the sieve plate (33) is provided at the bottom of the crushing bin (3); the discharge channel (41) is arranged below the sieve plate (33) and is connected to the discharge bin (4).

7. A double-air hammer self-priming crushing mill according to claim 6, characterized in that: When the discharge bin (4) is an internal fan structure, it is located at the other end of the crushing bin (3) and is placed inside the shell (12). The discharge channel (41) extends from the bottom to the lower outer side of the discharge bin (4) and enters the discharge bin (4) from the outside. The outer edge of the blade of the discharge impeller (42) is a bevel structure that gradually retracts from the outside to the inside, which is convenient for material suction. The discharge port (43) is located at the top of the discharge bin (4) and can be connected to the discharge pipe for installation.

8. The double-air hammer self-priming crushing mill according to claim 6, characterized in that: When the structure is an external fan, the discharge bin (4) is arranged outside the bearing seat (14) outside the crushing bin (3) between the bearing seat (14) and the driving pulley (11), the discharge channel (41) is directly connected to the inner side of the discharge bin (4) from the bottom, and enters the discharge bin (4) from the inside, and the inner side edge of the blade of the discharge impeller (42) is a bevel structure that gradually retracts from the outside to the inside, so as to facilitate the suction of materials; the discharge port (43) is located at the top of the discharge bin (4) and can be connected to the discharge pipe for installation.

9. The double-air hammer self-priming crushing mill according to claim 1, characterized in that: The upper half of the shell (12) is designed to be hinged and openable. The shell (12) is provided with a feed opening (5) located above the crushing bin (3). A feed chute (51) is installed outwardly on the feed opening (5), and an opening and closing plug plate (52) is installed outside the feed opening (5).

10. The double-air hammer self-priming crushing mill according to claim 1, characterized in that: A material suction bellows (28) is sleeved and installed at the material feeding suction port (27), and a self-suction barrel (29) is arranged at the end of the material suction bellows (28).

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