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

Abstract

The utility model discloses a double-air-hammer self-suction type crushing and crushing machine which comprises a feeding and crushing bin arranged at one end of a shell and used for performing self-suction type feeding and pre-crushing on 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 utility model relates to the technical field of agricultural machinery and equipment, mainly to a crusher, in particular to a double-wind hammer self-priming crushing crusher. Background Art

[0002] Feed grinder is a kind of equipment specially used for crushing feed raw materials. It is widely used in livestock and poultry farming, poultry farming, feed processing plants and other industries. The main function of feed grinder is to crush feed raw materials so that livestock and poultry can digest and absorb them more easily. The grinder usually adopts mechanical force and grinding and cutting principle to chop and break the feed raw materials to generate particles of appropriate size. Feed grinder can be divided into many types according to its working principle and structure, such as shear type, impact type, grinding type, etc. According to its function and processing capacity, grinder can also be divided into household type, small commercial type, industrial type, etc. Feed grinder is an indispensable part of feed processing industry, which can help farmers and breeders improve feed utilization efficiency, reduce costs and improve breeding benefits.

[0003] At present, hammer feed mill is a common feed mill model. Its working principle is to use high-speed rotating hammers to crush feed raw materials. Hammer feed mill has a fast processing speed and can efficiently process a large amount of feed raw materials. Hammer feed mill is suitable for crushing a variety of different materials, including grains, hay, corn stalks, etc. Hammer feed mill can crush feed raw materials evenly and finely through the high-speed collision, impact and shearing action of hammers to produce uniform granular feed. However, the existing hammer feed mill usually completes the crushing and crushing in a crushing bin. It can only be discharged through the screen plate after crushing to a certain particle fineness. However, this type of crusher currently has the problems of low processing efficiency, high energy consumption and horsepower demand, and easy wear. Once the degree of wear is large or the efficiency is insufficient, it often causes problems such as low efficiency and even discharge blockage. For example: Chinese patent CN220634567U is a strong suction hammer mill, which records the structure of single bin crushing, which is of little significance and cannot improve efficiency. Summary of the invention

[0004] In order to solve the problems and defects of the above-mentioned prior art, the inventor has developed and designed a new type of double-wind hammer self-priming crushing mill, which has an efficient pre-crushing and re-crushing structure, has efficient, smooth and continuous stable functions, reasonable structural design, easy to use and practical. Specifically, the utility model is implemented as follows:

[0005] A double-air hammer self-priming crushing mill comprises a frame, a shell placed on the frame, a main shaft placed in the shell, a crushing cutter disc and hammers installed on the main shaft, and a transmission pulley is arranged at the end of the main shaft, and the transmission pulley is used for transmission 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 shell, and is used for self-priming feeding and pre-crushing of materials; it comprises a crushing impeller mounted on the main shaft, and the crushing impeller is placed in the feeding and crushing bin, and a plurality of stirring teeth are arranged on the upper edge and the outer edge of the crushing blade of the crushing impeller, and a plurality of groups of kneading teeth cooperating with the stirring teeth are fixedly mounted on the bin wall; a feeding window is arranged on the bin wall connected to the crushing bin, and a feeding suction port is arranged on the bin wall located on the outer side;

[0007] The crushing bin is arranged in the shell and is used to crush the pre-crushed materials again and pass through the screen plate into the discharge bin; it includes several groups of crushing discs and hammers installed on the main shaft;

[0008] The discharge bin is arranged inside or outside the shell, connected to the crushing bin through a discharge channel, and is used to push the material in the discharge channel toward the discharge port for discharge; it includes a discharge impeller installed on the main shaft, which is provided with a discharge port.

[0009] The working principle of the utility model is introduced as follows: the double-wind hammer self-priming crushing mill of the utility model is composed of a frame, a shell, a main shaft, a crushing disc and hammers. The transmission pulley connects the main shaft and the power motor, and the rotation of the crushing disc and the hammers is driven by rotating the main shaft. The key is that there are also pre-crushing feed crushing bins, re-crushing crushing bins and discharge bins; after the crushing impeller of the feed crushing bin rotates with the main shaft, negative pressure suction is generated in the bin body, which can suck the material into the crusher through the self-priming design of the feed crushing bin; the crushing impeller of the feed crushing bin is provided with stirring teeth, which cooperate with the kneading teeth on the bin wall, so that after the material enters, it first collides and is torn under the interaction of the stirring teeth and kneading teeth on the crushing impeller, and pre-crushing is achieved. Due to the appropriate spacing of the stirring teeth and kneading teeth, materials such as corn are chopped into small pieces and fragments by the sharp stirring teeth and kneading teeth during high-speed rotation. After the crushing is completed, it enters the crushing bin from the feed window for re-crushing. After the material enters the crushing bin, it is re-crushed by several groups of crushing discs and hammers. The large and small teeth on the crushing disc are arranged regularly, and the auxiliary shaft and hammers are hung on the crushing disc. The crushing disc and hammers crush the material evenly and finely through the rotation of the main shaft. The crushed material enters the discharge channel through the screen plate. The discharge bin generates wind force that sucks inward and pushes outward due to the rotation of the discharge impeller, thereby sucking the material entering the discharge channel into the discharge impeller and pushing it into the discharge port, thereby realizing the transportation and discharge of the material. In the above-mentioned pre-crushing process, the initial collision and crushing are immediately carried out mainly by utilizing the initial high-speed rotation speed-up process after the material enters. Due to the use of the tooth-to-tooth matching structure, the corn granular material is cut into several small particles. The small particles begin to quickly sprinkle to the outer edge due to the change in their own weight, so they can immediately enter the feed window, and the newly entered corn kernels will first contact the crushing impeller close to the axis area due to their heavier weight. , after being crushed, it gradually moves to the outer edge, and then through the dynamic and static collision cutting of the stirring teeth and rubbing teeth, it quickly splits and crushes and moves to the outer edge area, and finally enters the crushing bin. This process is relatively fast, and there is no hammer knocking, and the crushed particle size of the material will not be too small or too broken. This continuous and fast primary crushing structure smoothly and efficiently completes the primary crushing function, and at the same time realizes continuous feeding and feeding to the crushing bin. The materials in the crushing bin are all small particles. Under the action of the crushing cutter disc and hammer, it can be more efficient and stable, and there will be no sieve plate blockage and material accumulation, so as to achieve fast and continuous crushing work, which is very suitable for self-priming feeding. In addition, the design of the feed window and the movable baffle can control the flow of materials and realize the opening and closing of the feed window. The sieve plate at the bottom of the crushing bin can be replaced, which is convenient for the selection of the sieve plate of the crushing fineness. The discharge bin can adopt an internal fan structure or an external fan structure, which increases the applicability and the appearance structure can meet the needs of users with different preferences. The upper part of the shell is a hinged open structure, which is convenient for maintenance and cleaning.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 utility model 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 hammers are only installed in the crushing bin to achieve reasonable classification of materials and avoid excessive crushing of materials during the pre-crushing process. This is the key to a higher and continuous subsequent 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 this utility model, only one component, the crushing impeller, needs to be replaced, which avoids the number of traditional replacements of the whole 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 utility model;

[0016] Figure 2 This is the second stereoscopic diagram of a double-air hammer self-priming crushing mill of the utility model;

[0017] Figure 3 This is a front view of the upper shell structure of the utility model;

[0018] Figure 4 This is a bottom-up stereoscopic view of the upper shell structure of the utility model;

[0019] Figure 5This is a top perspective view of the upper shell structure of the utility model;

[0020] Figure 6 This is a bottom view of the internal structure of the upper shell of the utility model;

[0021] Figure 7 This is a three-dimensional diagram of the internal structure of a double-air hammer self-priming crushing mill of the utility model;

[0022] Figure 8 This is a three-dimensional diagram of the main shaft and core cutter disc assembly of a double-air hammer self-priming crushing mill of the utility model;

[0023] Fig. 9 It is a top view of the internal structure of a double-air hammer self-priming crushing mill of the utility model;

[0024] Fig.10 It is a schematic diagram of the internal structure of a crushing chamber of a double-air hammer self-priming crushing mill of the utility model;

[0025] Fig.11 This is a front view of the internal structure of a double-air hammer self-priming crushing mill of the utility model;

[0026] Fig.12 This is a schematic diagram of the structure of a double-air hammer self-priming crushing mill in use state of the utility model;

[0027] Fig.13 This is a structural stereogram of a double-air hammer self-priming crushing mill in Example 2;

[0028] Fig.14 This is a diagram showing the internal structure of a double-air hammer self-priming crushing mill in Example 2;

[0029] Fig.15 This is a schematic diagram of the structure of the external discharge bin feeding channel of a double-air hammer self-priming crushing mill in Example 2;

[0030] in:

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

[0032] 2—feed crushing bin, 21—rotating disc, 22—ring structure, 23—crushing impeller, 24—stirring teeth, 25—kneading teeth, 26—feed window, 27—feed suction port, 28—suction bellows, 29—self-priming barrel;

[0033] 3-crushing bin, 31-crushing blade, 32-hammer, 33-screen plate, 34-auxiliary shaft, 35-crushing rack, 36-movable baffle, 37-adjusting knob, 38-damping slide;

[0034] 4—discharging bin, 41—discharging channel, 42—discharging impeller, 43—discharging port;

[0035] 5—feed opening, 51—feed chute, 52—opening and closing plug. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0037] Embodiment 1: A double-air hammer self-priming crushing mill, such as Figure 1-12 As shown, it includes 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 a hammer 32 installed on the main shaft 13, and a transmission pulley 11 is provided at the end of the main shaft 13. The transmission pulley 11 is used to be connected to the power motor to drive the main shaft 13 to rotate;

[0038] The feeding and crushing bin 2 is arranged at one end of the shell 12, and is used for self-priming feeding and pre-crushing of materials; it includes a crushing impeller 23 installed on the main shaft 13, and 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, and a plurality of groups of kneading teeth 25 that cooperate with the stirring teeth 24 are fixedly installed on the bin wall; a feeding window 26 is opened on the bin wall connected to the crushing bin 3, and a feeding suction port 27 is opened on the bin wall located on the outer side;

[0039] The crushing bin 3 is arranged in the housing 12 and is used to crush the pre-crushed materials again and pass through the screen plate 33 to enter the discharge bin 4; it includes a plurality of crushing blades 31 and hammers 32 installed on the main shaft 13;

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

[0041] When in use, install the motor under or outside the frame 1, use a suitable transmission belt to cover between the motor output shaft and the transmission pulley 11, check whether the components of each part of the equipment are installed completely and firmly, cover the shell 12, install the discharge pipe, suction bellows 28, self-priming barrel 29 and materials. In this embodiment, corn kernels are taken as an example, which are packed in bags and placed on one side of the crusher. The end of the suction bellows 28 is fixed on the feed suction port 27, and the self-priming barrel 29 at the other end is inserted into the corn kernel bag. Start the motor, the motor drives the main shaft 13 to rotate, and the whole crusher runs. The crushing impeller 23 rotates to generate suction, blow air into the crushing bin 3, and at the same time, the corn kernels are sucked into the feed suction pipe and sucked into the feed crushing bin 2 from the feed suction port 27. After the crushing impeller 23 of the crushing bin 2 rotates with the main shaft 13, negative pressure suction is generated in the bin body, which can suck the material into the crusher through the self-priming design of the feed crushing bin 2; the crushing impeller 23 of the feed crushing bin 2 is provided with stirring teeth 24, which cooperate with the kneading teeth 25 on the bin wall, so that after the material enters, it first collides and is torn under the interaction of the stirring teeth 24 and the kneading teeth 25 on the crushing impeller 23 to achieve pre-crushing. Since the spacing between the stirring teeth 24 and the kneading teeth 25 is properly set, materials such as corn are chopped into small pieces and fragments by the sharp stirring teeth 24 and the kneading teeth 25 during high-speed rotation. After the crushing is completed, the material enters the crushing bin 3 from the feed window 26 for re-crushing. After entering the crushing bin 3, the material is re-crushed by a number of groups of crushing cutter discs 31 and hammer pieces 32.

[0042] In this process, when corn kernels enter the feeding crushing bin 2 of the double-air hammer self-priming crushing mill, they are attracted by the negative pressure suction force generated by the crushing impeller 23 and sucked into the machine.

[0043] After entering the machine, the corn kernels will encounter the stirring teeth 24 on the crushing impeller 23 and the kneading teeth 25 on the bin wall. These two parts cooperate with each other to exert force on the corn kernels, so that the corn kernels collide and tear under the interaction of the stirring teeth 24 and the kneading teeth 25, and pre-crushing is achieved. After the pre-crushing is completed, the corn kernels become small pieces and fragments. They enter the crushing bin 3 through the feed window 26 for re-crushing. In the crushing bin 3, they will encounter a crushing device composed of several groups of crushing blades 31 and hammers 32. Driven by the main shaft 13, these blades and hammers 32 rotate to perform secondary impact crushing on the small pieces and fragments of corn, and further crush them into smaller particles. After the crushing is completed, these small corn particles will pass through the screen plate 33 into the discharge channel 41, and then be sent to the discharge bin 4. In the discharge bin 4, the rotation of the discharge impeller 42 generates wind force that sucks inward and pushes outward, 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, the original whole corn kernels are split into several small particles, and finally transported out of the machine through the discharge port 43, completing the entire process from granular to granular. This process is fast and continuous, so that the crushing task can be completed smoothly and efficiently.

[0044] Preferably, the crushing impeller 23 includes a rotating disk 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 provided on the edge of the rotating disk 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 feed suction port 27 can directly enter the crushing impeller 23 and contact the stirring teeth 24. The annular structure 22 and the beveled crushing blade structure as a whole form an inwardly concave space, and 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 beveled edge of the crushing impeller 23 or on the annular structure 22; 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 between 3-8mm, and the kneading teeth 25 are arranged in a horizontal manner, and the length of each group is adapted to the thickness of the crushing impeller 23. The corn kernels are cut and broken and pushed to move. During the high-speed rotation, the corn kernels are immediately thrown up and come into contact with the kneading teeth 25, resulting in multiple collisions and cuts, causing the corn kernels to quickly split into small particles. The chopped small particles are difficult to be further chopped by the kneading teeth 25 and the stirring teeth 24, but will be quickly thrown to the outer edge with the air flow, that is, enter the feed window 26 and enter the crushing chamber 3.

[0045] Preferably, several groups of crushing discs 31 and hammers 32 are installed in the crushing bin 3. The crushing disc 31 is in the shape of a tooth with large teeth and small teeth regularly arranged. Several auxiliary shafts 34 are installed through the crushing disc 31, and several hammers 32 are movably mounted on the auxiliary shafts 34. Several stirring teeth 24 are also provided on the edge of the hammer 32. Several crushing racks 35 are installed transversely along the length direction on the upper wall and side wall of the crushing bin 3. The sharp blade and sharper blade tip on the crushing disc 31, combined with the striking of the hammer 32, enable small particles to be quickly crushed into finer powdery materials.

[0046] Preferably, 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 outside of the feed crushing bin 2 through a connecting rod, the outer end of the connecting rod is connected to the adjusting knob 37, and the other end is connected to the movable baffle 36, the edge of the movable baffle 36 is placed in the damping chute 38 installed on the bin wall, and the adjusting knob 37 is turned to drive the movable baffle 36 to rotate along the damping chute 38 to control it to fully or partially open the feed window 26, so as to adjust and control the material flow entering the crushing bin 3, or close the feed window 26. According to different motor models, the speed of the pulverizer will be different, resulting in different feed amount and crushing efficiency. If they do not match each other, the material will be blocked and not smooth. 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, if it is not necessary to crush granular materials such as corn, but to process materials of other shapes 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 shell 12 is a hinged structure design, and the shell 12 is provided with a feed opening 5 above the crushing bin 3, and a feed chute 51 is installed outwardly on the feed opening 5, and an opening and closing plug 52 is installed outside the feed opening 5. Open the feed opening 5, put the material into the feed chute 51 and gradually slide it into the crushing bin 3. At this time, the opening and closing plug 52 is in the unloaded state. If you want to use self-priming to process granular materials, please note that the opening and closing plug 52 needs to be closed.

[0047] In this embodiment, when it is necessary to control the coarseness of the crushed material, a sieve plate 33 of a corresponding mesh number can be selected. 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, and the arc is adapted to 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.

[0048] 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 outer side and lower 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.

[0049] Embodiment 2 is different from the internal fan structure in embodiment 1. Figure 13-14 As shown, the present crusher can also be used. When the discharge bin 4 is an external fan structure, it is located outside the bearing seat 14 outside the crushing bin 3, and the discharge bin 4 is arranged 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. The inner side 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 inhalation; the discharge port 43 is located at the top of the discharge bin 4, and can be connected to the discharge pipe.

[0050] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the 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 the main shaft (13); the crushing impeller (23) is placed in the feeding and crushing bin (2); a feeding window (26) is provided on the bin wall connected to the crushing bin (3); and a feeding suction port (27) is provided on the bin wall located on the outside; 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: A plurality of stirring teeth (24) are arranged on the upper edge and outer edge of the crushing blade of the crushing impeller (23), and a plurality of groups of kneading teeth (25) that cooperate with the stirring teeth (24) are fixedly mounted on the bin wall; the crushing impeller (23) comprises a rotating disk (21) and an annular sheet structure (22), wherein the annular sheet structure (22) is arranged on the side close to the feeding direction, and a plurality of stirring teeth (24) are arranged on the edge of the rotating disk (21) and the inner and outer edges of the annular sheet structure (22).

3. A double-air hammer self-priming crushing mill according to claim 1, 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 discharge bin (4) is an external fan structure, it is located outside the bearing seat (14) outside the crushing bin (3), and the discharge bin (4) is arranged between the bearing seat (14) and the transmission 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. 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, 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.

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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