Koji block crusher

Abstract

The invention provides a yeast block crusher, which belongs to the technical field of grain brewing equipment, and comprises a machine body, a primary screening assembly and a fine screening assembly, the machine body is provided with a crushing cavity, a first crushing roller pair, a second crushing roller pair and a third crushing roller pair are sequentially arranged in the crushing cavity from top to bottom at intervals, first channels are formed in the two sides of the second crushing roller pair, and second channels are formed in the two sides of the third crushing roller pair; the primary screening assembly is arranged between the primary crushing roller pair and the secondary crushing roller pair and is used for screening primary crushing yeast materials and guiding primary screening oversize materials to fall into the secondary crushing roller pair and primary screening undersize materials to fall into the first channel; and the fine screening assembly is arranged between the second crushing roller and the third crushing roller, and is used for screening the second crushing yeast material and the primary screening undersize material falling down through the first channel, and guiding the fine screening oversize material to enter the third crushing roller, and the fine screening undersize material falls into the second channel. The yeast block crusher provided by the invention can prevent the yeast material meeting the granularity requirement from being repeatedly crushed, so that the proportion of the yeast material meeting the granularity requirement of the process after the yeast block is crushed is increased, and the waste of the yeast material is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of grain brewing equipment, specifically relating to a koji crusher. Background Technology

[0002] Koji blocks are an essential raw material for brewing. They are typically made into brick shapes to ensure compactness and facilitate storage and transportation. During grain fermentation for brewing, to ensure even and sufficient contact between the koji and the grain, the koji blocks need to be crushed. The particle size and uniformity of the resulting koji material are crucial. Larger particles result in a smaller and uneven contact area between the koji and the grain, leading to incomplete fermentation and affecting the alcohol yield. Conversely, particles that are too small reduce aeration during fermentation, failing to meet the necessary oxygen requirements and also causing incomplete fermentation, which similarly affects the alcohol yield.

[0003] Most common koji (fermented koji) crushing equipment in existing technologies is a two- or three-stage combined crusher. Koji blocks are initially crushed into large particles by the first-stage crushing rollers (usually hammer rollers), and then further crushed by the second and third-stage crushing rollers to obtain koji material with the required particle size. The drawback of this type of crushing equipment is that each stage of the crushing process produces koji material that already meets the particle size requirements. This material is further refined by compression and shearing in the next stage of crushing rollers, resulting in a large amount of excessively small particles or even powdery residue after the final crushing. To avoid affecting fermentation aeration, this residue must be screened out after crushing, leading to a significant waste of koji material during the crushing process. Summary of the Invention

[0004] This invention provides a smelting block crusher, which aims to increase the proportion of smelting blocks that meet the required particle size after crushing, thereby reducing smelting block waste.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a block crusher, comprising: The machine body has a crushing chamber. The top of the crushing chamber is provided with a feed inlet and the bottom is provided with a discharge outlet. The crushing chamber is provided with a first crushing roller, a second crushing roller and a third crushing roller arranged in sequence. The second crushing roller has a first channel on both sides and the third crushing roller has a second channel on both sides that connects to the discharge outlet. The primary screening assembly is located between the primary crushing rollers and the secondary crushing rollers. It is used to screen the primary crushed material and guide the material oversize from the primary screening to fall into the secondary crushing rollers and the material undersize from the primary screening to fall into the first channel. The fine screening assembly is located between the secondary crushing rollers and the tertiary crushing rollers. It is used to screen the secondary crushed material and the primary screen undersize material falling through the first channel, and guide the fine screen oversize material into the tertiary crushing rollers and the fine screen undersize material into the second channel.

[0006] In one possible implementation, the initial screening component includes: Two primary screening plates are respectively set above the two rollers of the secondary crusher. One side of the primary screening plate is connected to the cavity wall of the crushing chamber, and the other side extends downward at an angle. The feed inlet of the secondary crusher is formed between the extended sides of the two primary screening plates. Two secondary crushing guard rollers are connected to the extension sides of the two primary screening plates, and extend into the first channel from the outside of the two roller bodies of the secondary crushing rollers.

[0007] For example, the primary screening assembly also includes a first guide cone, which is positioned directly above the secondary crusher inlet and is used to guide the primary crushed material falling from the gap between the rollers of the primary crusher to the two primary screening plates.

[0008] In one possible implementation, the fine screening component includes: Two fine screen plates are respectively set above the two rollers of the three crushing rollers. One side of the fine screen plate is connected to the cavity wall of the crushing chamber, and the other side extends downward at an angle. The three crushing feed port is formed between the extended sides of the two fine screen plates. Two triple-crushing guard rollers are connected to the extended sides of the two fine screen plates respectively, and extend into the second channel from the outside of the two roller bodies of the triple-crushing rollers respectively.

[0009] For example, the extended sides of the two fine screen plates are spaced vertically and horizontally staggered; a second guide cone is provided directly below the gap between the rollers of the second crusher, and the second guide cone blocks the feed inlet of the third crusher.

[0010] For example, there is a movement gap between both ends of the fine screen plate and the cavity wall of the crushing chamber, and at least one end of the fine screen plate is provided with an elastic push-pull member, which is used to apply an elastic force to the fine screen plate along the roller body axis of the three crushing rollers; one side of the fine screen plate is slidably connected to the cavity wall of the crushing chamber along the roller body axis of the three crushing rollers, and the other side is slidably engaged with the corresponding three crushing guard roller plate.

[0011] In some embodiments, at both ends of the fine screen plate are provided with at least one shaft protruding through the wall of the crushing chamber, and each shaft protruding through the crushing chamber is connected to an elastic push-pull member, which is fixed to the outer wall of the crushing chamber.

[0012] For example, the resilient push-pull member includes: The fixed sleeve is fixed to the outer wall of the crushing chamber and has a buffer cavity for the shaft to pass through; The limiting ring is fixedly sleeved on the part of the shaft located inside the buffer cavity; Two elastic elements are sleeved on the shaft, and the two elastic elements are placed on both sides of the limiting ring in the buffer cavity and are both in a pre-compression state.

[0013] In some embodiments, the fine screening assembly further includes a drive mechanism located in the body outside the crushing chamber, with its output end connected to the end of one of the shafts extending out of the buffer chamber. The drive mechanism is used to apply an axial driving force to the shaft.

[0014] For example, the drive mechanism includes: A rotary drive component is fixed to the machine body, and a drive impeller is sleeved at the output end. The peripheral wall of the drive impeller has a corrugated drive surface. The roller is rotatably connected to the end of the shaft that extends out of the buffer cavity, and the roller makes rolling contact with the corrugated drive surface.

[0015] The beneficial effects of the block crusher provided by the present invention are as follows: Compared with the prior art, in the block crusher of the present invention, after the complete block enters the crushing chamber through the feed inlet, it first passes through the first crushing roller to obtain the first crushed block material. The first crushed block material falls on the primary screening component for screening. The material on the primary screening falls into the second crushing roller for secondary crushing. The material undersized from the primary screening slides directly from the first channel to the fine screening component for screening again. Then, the second crushed block material after passing through the second crushing roller also falls into the fine screening component for screening. The material oversized from the fine screening falls into the third crushing roller for tertiary crushing to obtain the block material with the particle size required by the process and is discharged from the crushing chamber through the discharge outlet. The material undersized from the fine screening that has met the particle size requirements after the second crushing falls directly through the second channel, bypassing the third crushing roller, into the discharge outlet for discharge.

[0016] The screening by the primary screening component can prevent small particles of koji material from being crushed by the secondary crushing rollers. The screening by the fine screening component can prevent koji material that has already met the process requirements after secondary crushing from being further crushed by the tertiary crushing rollers. This avoids over-crushing, thereby reducing the proportion of small particles of koji material discharged from the outlet, improving the uniformity of koji block crushing and the proportion of koji material that meets the process requirements, and thus improving the particle size qualification rate after koji block crushing and reducing koji material waste. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural schematic diagram of a block crusher provided in an embodiment of the present invention; Figure 2 The curved block crusher provided in the embodiments of the present invention is along Figure 1 Schematic diagram of the cross-sectional structure along line AA; Figure 3 The block crusher provided in the embodiments of the present invention Figure 1 Schematic diagram of the cross-sectional structure of the middle BB line; Figure 4 for Figure 1 A magnified schematic diagram of the local structure at point C; Figure 5 for Figure 3 A magnified schematic diagram of the local structure at point D; Figure 6 for Figure 3 A magnified schematic diagram of the local structure at point E; Figure 7 This is a schematic diagram of the cooperation structure between the shaft and the drive impeller used in the embodiments of the present invention.

[0018] In the diagram: 10. Machine body; 100. Crushing chamber; 101. Feed inlet; 102. Discharge outlet; 103. First channel; 104. Second channel; 11. Primary crushing rollers; 12. Secondary crushing rollers; 13. Tertiary crushing rollers; 14. Press block; 20. Primary screening assembly; 21. Primary screening plate; 210. Secondary crushing feed inlet; 211. Sealing strip; 22. Secondary crushing guard roller plate; 23. First guide cone; 30. Fine screening assembly. Components; 31. Fine screen plate; 310. Third crusher feed inlet; 311. Movement gap; 312. Shaft; 313. Slide groove; 32. Third crusher guard roller plate; 33. Second guide cone; 34. Elastic push-pull component; 341. Fixed sleeve; 342. Limiting ring; 343. Elastic element; 35. Drive mechanism; 351. Rotary drive component; 352. Drive impeller; 3521. Corrugated drive surface; 353. Roller. Detailed Implementation

[0019] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0020] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] It should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0022] Please refer to the following: Figures 1 to 7The present invention will now describe the block crusher provided. The block crusher includes a body 10, a primary screening assembly 20, and a secondary screening assembly 30. The body 10 has a crushing chamber 100, with a feed inlet 101 at the top and a discharge outlet 102 at the bottom. A primary crushing roller 11, a secondary crushing roller 12, and a tertiary crushing roller 13 are arranged sequentially and alternately within the crushing chamber 100. The secondary crushing roller 12 has first channels 103 on both sides, and the tertiary crushing roller 13 has second channels connecting to the discharge outlet 102 on both sides. 104; The primary screening assembly 20 is located between the primary crushing rollers 11 and the secondary crushing rollers 12, and is used to screen the primary crushed material and guide the primary screening oversize material to fall into the secondary crushing rollers 12 and the primary screening undersize material to fall into the first channel 103; The fine screening assembly 30 is located between the secondary crushing rollers 12 and the tertiary crushing rollers 13, and is used to screen the secondary crushed material and the primary screening undersize material falling through the first channel 103, and guide the fine screening oversize material into the tertiary crushing rollers 13 and the fine screening undersize material to fall into the second channel 104.

[0023] It should be noted that in this embodiment, the surface shapes and spacing of the rollers of the primary crushing roller 11, the secondary crushing roller 12, and the tertiary crushing roller 13 are different, aiming to achieve a gradual reduction in the particle size of the crushed material. Optionally, the primary crushing roller 11 can be a roller with distributed wolf-tooth cones, which can stably crush the complete shaped material using the spike effect of the wolf-tooth cones; the secondary crushing roller 12 can be a staggered toothed ring roller, which uses the staggered toothed rings to cut and crush the shaped material after primary crushing, thereby reducing the particle size of the shaped material; the tertiary crushing roller 13 can be a grooved roller, which uses the speed ratio between its two rollers to form a shearing crushing effect on the secondary crushed material. The spacing of the tertiary crushing roller 13 is matched and set based on the particle size required by the process, so that the shaped material with the particle size required by the process is obtained after the tertiary crushing.

[0024] Considering that some of the koji material will have a particle size smaller than that obtained after the crushing of the next stage roller crusher during the primary and secondary crushing processes, if this koji material continues to enter the next stage roller crusher for repeated crushing, it will result in koji material particles that are too small. Ultimately, these materials with excessively small particles need to be screened out before the fermentation process, which seriously affects the qualified rate of koji material particle size obtained after crushing the koji blocks.

[0025] The primary screening component 20 determines its screen aperture size based on the particle size of the koji material obtained after secondary crushing. After the primary crushing koji material falls into the primary screening component 20, koji material with a particle size exceeding the screen aperture size falls onto the secondary crushing rollers 12 as the oversize material and is crushed. Koji material with a particle size smaller than the screen aperture size forms the undersize material and enters the first channel 103, from where it falls onto the fine screening component 30 for secondary screening. This avoids the situation where koji material with a particle size smaller than that of the secondary crushing koji material in the primary crushing re-enters the secondary crushing rollers 12 for repeated crushing.

[0026] The screen aperture size of the fine screening component 30 can be determined by the particle size of the koji material after the three-stage crushing process, which is the particle size required by the process. After the koji material from the second-stage crushing and the undersize material from the primary screening fall into the fine screening component 30, the koji material with a particle size larger than the screen aperture size falls onto the third-stage crushing roller 13 as the oversize material of the fine screening for further crushing. Meanwhile, the koji material with a particle size smaller than the screen aperture size forms the undersize material of the fine screening and bypasses the third-stage crushing roller 13, entering the second channel 104 and falling directly to the discharge port 102. This avoids the situation where the koji material from the first and second stages, whose particle size is already smaller than the particle size of the third-stage crushing material, re-enters the third-stage crushing roller 13 for repeated crushing.

[0027] Compared with the prior art, the shaped block crusher provided in this embodiment allows the complete shaped block to enter the crushing chamber 100 through the feed inlet 101. It first passes through the first crushing roller 11 to obtain the first crushed material. The first crushed material falls on the primary screening component 20 for screening. The material on the primary screening falls into the second crushing roller 12 for secondary crushing. The material undersized from the primary screening slides directly from the first channel 103 to the fine screening component 30 for screening again. The second crushed material after passing through the second crushing roller 12 also falls into the fine screening component 30 for screening. The material oversized from the fine screening falls into the third crushing roller 13 for tertiary crushing to obtain shaped block with particle size that meets the process requirements and is discharged from the crushing chamber 100 through the discharge outlet 102. The material undersized from the fine screening that meets the process requirements after the second crushing falls directly through the second channel 104, bypassing the third crushing roller 13, and is discharged into the discharge outlet 102.

[0028] The screening by the primary screening component 20 can prevent small particles of koji material in the primary crushing material from being crushed by the secondary crushing rollers 12. The screening by the fine screening component 30 can prevent koji material that has already met the process requirements after secondary crushing from being further crushed by the tertiary crushing rollers 13, thus avoiding over-crushing. This reduces the proportion of small particles of koji material discharged from the discharge port 102, improves the uniformity of koji block crushing and the proportion of koji material that meets the process requirements, thereby improving the particle size qualification rate after koji block crushing and reducing koji material waste.

[0029] In some embodiments, see Figure 1 The primary screening assembly 20 includes two primary screening plates 21 and two secondary crushing guard roller plates 22. The two primary screening plates 21 are respectively disposed above the two roller bodies of the secondary crushing roller 12. One side of the primary screening plate 21 is connected to the cavity wall of the crushing chamber 100, and the other side extends downward at an incline. The secondary crushing feed inlet 210 is formed between the extended sides of the two primary screening plates 21. The two secondary crushing guard roller plates 22 are respectively connected to the extended sides of the two primary screening plates 21, and extend into the first channel 103 from the outside of the two roller bodies of the secondary crushing roller 12.

[0030] The two ends of the primary screening plate 21 in the axial direction of the secondary crushing roller 12 can be fixedly connected to the corresponding side walls of the crushing chamber 100. One side of the primary screening plate 21 in the roller spacing direction of the secondary crushing roller 12 is fixedly connected to the wall of the crushing chamber 100, and the other side extends downward to the top of the roller body of the secondary crushing roller 12. In this way, the primary screening plate 21 can form a connection with the wall of the crushing chamber 100 fixed on three sides, thereby ensuring the connection stability of the primary screening plate 21.

[0031] Considering the large screen aperture size of the primary screen plate 21 and the certain vibration during machine operation, the primary screen plate 21 is directly fixed to the crushing chamber 100. The primary crushed material falling onto the primary screen plate 21 can be automatically screened. The material on the primary screen falls into the secondary crushing roller 12 through the secondary crushing inlet 210 formed between the two primary screen plates 21. To prevent the primary crushed material from falling directly into the secondary crushing inlet 210, the extended ends of the two primary screen plates 21 can be staggered, or a blocking component can be installed above the secondary crushing inlet 210.

[0032] Based on the above, in order to prevent the undersize material from colliding with the surface of the secondary crushing roller 12 in the first channel 103, a secondary crushing guard roller plate 22 is provided to cover the outer periphery of the roller body of the secondary crushing roller 12. The secondary crushing guard roller plate 22 guides the undersize material from the primary screening, which can improve the smoothness of the undersize material from the primary screening entering the first channel 103 and falling onto the fine screening assembly 30.

[0033] It should be noted that, as Figure 1 As shown, as an optional structure of the above-mentioned primary screening component 20, it also includes a first guide cone 23, which is positioned directly above the secondary crusher inlet 210 and is used to guide the primary crushed material falling from the gap between the rollers of the primary crusher rollers 11 to the two primary screening plates 21.

[0034] The first guide cone 23 can be formed by two guide plates connected in a herringbone cone structure to block the feed inlet 210 of the secondary crusher. When the primary crushed material falls, it first falls onto the first guide cone 23, and then is diverted by the first guide cone 23 and slides onto the two primary screening plates 21, thereby preventing the primary crushed material from falling directly into the secondary crusher rollers 12 without being screened.

[0035] The two ends of the first guide cone 23 can be fixedly connected to the two opposing cavity walls of the crushing chamber 100. Thus, the first guide cone 23 not only has the function of blocking the secondary crushing feed inlet 210, but also can improve the structural strength of the crushing chamber 100. In addition, after the first guide cone 23 separates the primary crushed material, it can buffer the impact force of the primary crushed material on the primary screen plate 21. This not only avoids the primary screen plate 21 from being frequently damaged by collisions, but also uses the guiding effect of the first guide cone 23 to make the primary crushed material slide smoothly onto the primary screen plate 21, which can prevent the primary crushed material from bouncing on the primary screen plate 21, thereby improving the screening effect of the primary screen plate 21 on the primary crushed material.

[0036] Furthermore, a first tube beam can be installed below the tip of the first guide cone 23 to provide sufficient support, thereby preventing the first guide cone 23 from being damaged by frequent collisions and impacts from the broken block.

[0037] It is necessary to understand that, such as Figure 3 As shown, in order to prevent material leakage downward through the gap between the primary screen plate 21 and the wall of the crushing chamber 100, sealing strips 211 are provided between the two ends of the primary screen plate 21 and the wall of the crushing chamber 100. The sealing strips 211 seal the gap and also buffer and dampen the primary screen plate 21, thereby improving the connection stability of the primary screen plate 21 in the crushing chamber 100.

[0038] In some embodiments, please refer to Figure 1 The fine screening assembly 30 includes two fine screening plates 31 and two triple crushing guard roller plates 32. The two fine screening plates 31 are respectively disposed above the two roller bodies of the triple crushing roller 13. One side of the fine screening plate 31 is connected to the cavity wall of the crushing chamber 100, and the other side extends downward at an incline. A triple crushing feed inlet 310 is formed between the extended sides of the two fine screening plates 31. The two triple crushing guard roller plates 32 are respectively connected to the extended sides of the two fine screening plates 31, and extend into the second channel 104 from the outside of the two roller bodies of the triple crushing roller 13.

[0039] The two ends of the fine screen plate 31 in the axial direction of the triple crushing roller 13 can be connected to the corresponding side walls of the crushing chamber 100. One side of the fine screen plate 31 in the roller spacing direction of the triple crushing roller 13 is connected to the wall of the crushing chamber 100, and the other side extends downward to the top of the roller body of the triple crushing roller 13. The two ends of the triple crushing guard roller plate 32 in the axial direction of the triple crushing roller 13 are fixedly connected to the corresponding side walls of the crushing chamber 100, and the upper end of the triple crushing guard roller plate 32 is connected to the extension side of the fine screen plate 31, so that all four edges of the fine screen plate 31 can be effectively connected, thereby ensuring the connection stability of the fine screen plate 31.

[0040] The triple crushing guard roller plate 32 can also guide the undersize material of the fine screening plate 31 to smoothly enter the second channel 104, avoid the fine screening undersize material from colliding with the roller surface of the triple crushing roller 13 in the second channel 104, and improve the smoothness of the fine screening undersize material bypassing the triple crushing roller 13 and entering the second channel 104 directly to the discharge port 102.

[0041] Specifically, such as Figure 1 As shown, in this embodiment, the extension sides of the two fine screen plates 31 are spaced vertically and horizontally staggered; a second guide cone 33 is provided directly below the gap between the rollers of the second crusher roller 12, and the second guide cone 33 blocks the top of the feed inlet 310 of the third crusher.

[0042] The vertical spacing between the extended sides of the two fine screen plates 31 forms an open triple crushing feed inlet 310, while the horizontal stagger ensures the tightness of the two fine screen plates 31 in the vertical direction to block the triple crushing rollers 13. This allows all the secondary crushed material to fall onto the two fine screen plates 31 for screening before entering the triple crushing feed inlet 310 and finally onto the triple crushing rollers 13. Furthermore, by setting a second guide cone 33 above the triple crushing feed inlet 310, the impact force of the secondary crushed material can be buffered, allowing it to slide smoothly onto the two fine screen plates 31, preventing it from jumping on the fine screen plates 31 and affecting the screening efficiency. On the other hand, it can guide the secondary crushed material to slide onto the fine screen plates 31 in an area relatively far away from the triple crushing feed inlet 310, thereby ensuring the screening and sliding distance of the secondary crushed material on the fine screen plates 31 and improving the fine screening effect.

[0043] In addition, the fixed connection between the two ends of the second guide cone 33 and the cavity wall of the crushing chamber 100 can improve the overall structural strength of the crushing chamber 100. Of course, the second guide cone 33 can be based on the load-bearing beam as the load-bearing structure, and two tops of the load-bearing beam can be fixed together to form a herringbone-shaped guide panel, which can both ensure its own impact resistance and improve the overall structural strength of the machine.

[0044] As a modified embodiment of the above-mentioned fine screening component 30, please refer to Figures 1 to 5 Both ends of the fine screen plate 31 have a movement gap 311 between them and the cavity wall of the crushing chamber 100. At least one end of the fine screen plate 31 is provided with an elastic push-pull member 34, which is used to apply an elastic force to the fine screen plate 31 along the roller body axial direction of the triple crushing roller 13. One side of the fine screen plate 31 is slidably connected to the cavity wall of the crushing chamber 100 along the roller body axial direction of the triple crushing roller 13, and the other side is slidably engaged with the corresponding triple crushing guard roller plate 32.

[0045] Considering the small size of the screen holes in the fine screen plate 31, the amplitude obtained by relying solely on the vibration of the whole machine is small, and the screening effect cannot be guaranteed. Therefore, a movement gap 311 is left between the two ends of the fine screen plate 31 and the cavity wall of the crushing chamber 100. At the same time, the two sides of the fine screen plate 31 are slidably connected to the cavity wall of the crushing chamber 100 and the three-crushing guard roller plate 32, respectively. Then, the elastic force applied to the two ends of the fine screen plate 31 by the elastic push-pull member 34 is used, so that the fine screen plate 31 can obtain a larger amplitude with the vibration of the whole machine, thereby improving the screening effect of the fine screen plate 31.

[0046] For details, see Figure 4 and Figure 5 The sliding fit structure between the fine screen plate 31 and the cavity wall of the crushing chamber 100 is achieved by a row of pressure blocks 14 fixed to the cavity wall of the crushing chamber 100, which press against the edge of the fine screen plate 31. The pressure blocks 14 have an L-shaped structure and form a groove between themselves and the cavity wall of the crushing chamber 100, matching the edge thickness of the fine screen plate 31. This ensures that the edge of the fine screen plate 31 can slide between the pressure blocks 14 and the cavity wall of the crushing chamber 100. The sliding connection structure between the fine screen plate 31 and the three-crushing guard roller plate 32 can be achieved by bending and flanging the extended side of the fine screen plate 31 to form a sliding groove 313, and the edge of the three-crushing guard roller plate 32 extends into the sliding groove 313 to form a sliding fit. Thus, both sides of the fine screen plate 31 form a sliding fit, allowing it to reciprocate within the size range of the movement gap 311 to achieve motion screening, thereby improving the screening effect.

[0047] For some possible implementations, please refer to [link / reference]. Figure 3 and Figure 5 At both ends of the fine screen plate 31, there is at least one shaft 312 that protrudes through the wall of the crushing chamber 100. Each shaft 312 is connected to an elastic push-pull member 34 at the part that protrudes through the crushing chamber 100. The elastic push-pull member 34 is fixed to the outer wall of the crushing chamber 100.

[0048] By providing at least one shaft 312 at each end of the fine screen plate 31 to slide against the wall of the crushing chamber 100, additional sliding constraints are added to both ends of the fine screen plate 31, which already has sliding constraints on both sides, thereby improving the stability of the sliding connection between the fine screen plate 31 and the crushing chamber 100. The elastic push-pull member 34 can be fixed to the outer wall of the crushing chamber 100 to apply elastic force to the shaft 312, which is then transmitted to the fine screen plate 31, thus preventing the elastic push-pull member 34 from occupying the internal space of the crushing chamber 100.

[0049] For example, the above-mentioned elastic push-pull member 34 adopts such as Figure 5The structure shown includes a fixed sleeve 341, a limiting ring 342, and two elastic elements 343. The fixed sleeve 341 is fixed to the outer wall of the crushing chamber 100 and has a buffer cavity through which the shaft 312 passes. The limiting ring 342 and the fixed sleeve 341 are connected to the part of the shaft 312 located in the buffer cavity. The two elastic elements 343 are sleeved on the shaft 312, and the two elastic elements 343 are placed on both sides of the limiting ring 342 in the buffer cavity and are both in a pre-compression state.

[0050] The elastic element 343 can be a helical spring or a disc spring, and the limiting ring 342 can specifically be a spring retainer that engages with the upper limit slot of the shaft 312. The two elastic elements 343, placed on both sides of the limiting ring 342, jointly provide an elastic force to the limiting ring 342, thereby applying the elastic force to the shaft 312 through the limiting ring 342. This allows the shaft 312 to obtain bidirectional elastic force along its axial direction, thus meeting the bidirectional reciprocating motion requirements of the fine screen plate 31. The overall structure is simple and compact, and the fine screen plate 31 can achieve reciprocating motion for material screening by relying on the vibration force of the whole machine movement in conjunction with the elastic force of the elastic element 343, thereby improving the screening effect.

[0051] In some possible implementations, to improve the stability of the reciprocating screening motion of the fine sieve plate 31, please refer to [link / reference needed]. Figure 6 The aforementioned fine screening assembly 30 also includes a drive mechanism 35. The drive mechanism 35 is located on the body 10 outside the crushing chamber 100, and its output end is connected to the end of one of the shafts 312 that extends out of the buffer chamber. The drive mechanism 35 is used to apply an axial driving force to the shaft 312. By applying an axial driving force to the shaft 312 through the drive mechanism 35, and cooperating with the elastic push-pull member 34, the fine screening plate 31 is driven to reciprocate. This provides a stable driving source for the fine screening plate 31, which is more stable and reliable than simply relying on the vibration of the entire machine as a power source. This is beneficial for improving the stability and screening effect of the fine screening plate 31.

[0052] Optionally, such as Figure 7 As shown, in this embodiment, the drive mechanism 35 includes a rotary drive component 351 and a roller 353; the rotary drive component 351 is fixed to the body 10 and the output end is sleeved with a drive impeller 352, the peripheral wall of the drive impeller 352 has a corrugated drive surface 3521; the roller 353 is rotatably connected to the end of the shaft 312 that passes through the buffer cavity, and the roller 353 rolls in contact with the corrugated drive surface 3521.

[0053] The rotary drive component 351 can be a motor, which drives the drive impeller 352 to rotate. This causes the corrugated drive surface 3521 of the drive impeller 352 to exert a continuous pushing force on the roller 353. Specifically, when the crest of the corrugated drive surface 3521 contacts the roller 353, it exerts an axial pushing force on the shaft 312. When the trough of the corrugated drive surface 3521 aligns with the roller 353, the shaft 312 rolls against the corrugated drive surface 3521 based on the elastic force of the elastic push-pull component 34. This allows the shaft 312 to achieve continuous reciprocating motion under the combined action of the elastic push-pull component 34 and the corrugated drive surface 3521, thereby achieving stable screening action of the fine screen plate 31 and improving the screening effect.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A block crusher, characterized in that, include: The machine body has a crushing chamber, with a feed inlet at the top and a discharge outlet at the bottom. A first crushing roller, a second crushing roller, and a third crushing roller are arranged sequentially and alternately inside the crushing chamber. The second crushing roller has a first channel on both sides, and the third crushing roller has a second channel on both sides that connects to the discharge outlet. The primary screening assembly is located between the first crushing rollers and the second crushing rollers. It is used to screen the primary crushed material and guide the material oversize from the primary screening to fall into the second crushing rollers and the material undersize from the primary screening to fall into the first channel. The fine screening assembly is located between the secondary crushing rollers and the tertiary crushing rollers. It is used to screen the secondary crushed material and the primary screen undersize material falling through the first channel, and to guide the fine screen oversize material into the tertiary crushing rollers and the fine screen undersize material into the second channel.

2. The block crusher as described in claim 1, characterized in that, The primary screening component includes: Two primary screening plates are respectively positioned above the two rollers of the secondary crushing rollers. One side of each primary screening plate is connected to the wall of the crushing chamber, and the other side extends downward at an angle. The two extended sides of the primary screening plates form the secondary crushing feed inlet. Two secondary crushing guard rollers are respectively connected to the extended sides of the two primary screening plates, and extend into the first channel from the outer sides of the two roller bodies of the secondary crushing rollers.

3. The block crusher as described in claim 2, characterized in that, The primary screening assembly also includes a first guide cone, which is positioned directly above the secondary crusher inlet and is used to guide the primary crushed material falling from the gap between the rollers of the primary crusher to the two primary screening plates.

4. The block crusher as described in claim 1, characterized in that, The fine screening component includes: Two fine screen plates are respectively disposed above the two rollers of the three-crusher rollers. One side of the fine screen plate is connected to the cavity wall of the crushing chamber, and the other side extends downward at an angle. The three-crusher feed port is formed between the extended sides of the two fine screen plates. Two triple-crushing guard rollers are respectively connected to the extended sides of the two fine screen plates, and extend into the second channel from the outer sides of the two roller bodies of the triple-crushing rollers.

5. The block crusher as described in claim 4, characterized in that, The two fine screen plates have their extended sides spaced vertically and staggered horizontally; a second guide cone is provided directly below the gap between the rollers of the second crusher, and the second guide cone blocks the feed inlet of the third crusher.

6. The block crusher as described in claim 4, characterized in that, Both ends of the fine screen plate have a movement gap with the cavity wall of the crushing chamber, and at least one end of the fine screen plate is provided with an elastic push-pull member, which is used to apply an elastic force to the fine screen plate along the roller body axial direction of the three crushing rollers; one side of the fine screen plate is slidably connected to the cavity wall of the crushing chamber along the roller body axial direction of the three crushing rollers, and the other side is slidably engaged with the corresponding three crushing guard roller plate.

7. The block crusher as described in claim 6, characterized in that, At each end of the fine screen plate, there is at least one shaft protruding through the wall of the crushing chamber. Each shaft protruding through the crushing chamber is connected to an elastic push-pull member, which is fixed to the outer wall of the crushing chamber.

8. The block crusher as described in claim 7, characterized in that, The elastic push-pull component includes: A fixing sleeve is fixed to the outer wall of the crushing chamber and has a buffer cavity through which the shaft passes; A limiting ring is fixedly sleeved on the part of the shaft located inside the buffer cavity; Two elastic elements are sleeved on the shaft, and the two elastic elements are placed on both sides of the limiting ring in the buffer cavity and are both in a pre-compression state.

9. The block crusher as described in claim 8, characterized in that, The fine screening assembly also includes a drive mechanism, which is located on the body outside the crushing chamber and its output end is connected to the end of one of the shafts that extends out of the buffer chamber. The drive mechanism is used to apply an axial driving force to the shaft.

10. The block crusher as described in claim 9, characterized in that, The drive mechanism includes: A rotary drive component is fixed to the machine body, and a drive impeller is sleeved at the output end. The peripheral wall of the drive impeller has a corrugated drive surface. A roller is rotatably connected to the end of the shaft that extends out of the buffer cavity, and the roller makes rolling contact with the corrugated drive surface.

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