A step crushing type single roll slag crusher

Abstract

The utility model relates to single roll slag crusher field, concretely relates to a kind of single roll slag crusher of grading crushing, it includes: upper shell and lower shell, and the upper shell is equipped with slag mechanism one in, and the lower shell is equipped with slag mechanism two in, and slag mechanism one includes fixed jaw plate and moving jaw plate, and V type pulverization cavity is formed between fixed jaw plate and moving jaw plate, and the top of upper shell is equipped with eccentric drive assembly, and eccentric drive assembly is connected with movable plate, moving jaw plate is installed in one side of movable plate, and the other side of movable plate is connected with movable elbow component. By driving mechanism reciprocating motion under the drive of eccentric drive assembly, and cooperate with fixed jaw plate to carry out extrusion and shear force to carry out preliminary extrusion crushing to slag, after the slag after preliminary crushing by slag mechanism one, driving mechanism drives pulverizing roller component rotation, cooperate with auxiliary jaw plate component, and the slag is crushed into finer particle, meet the granularity requirement of subsequent conveying and processing, realize grading crushing, improve crushing effect and product quality.

Description

Technical Field

[0001] This utility model relates to the field of single-roll crushers, and in particular to a graded crushing type single-roll crusher. Background Technology

[0002] A single-roll slag crusher is a device that processes boiler ash through mechanical crushing. Its core function is to crush high-hardness materials such as slag and stones into particles that meet the requirements for subsequent conveying. Its main working principle is to crush the slag falling into the crushing chamber into a specified particle size through the squeezing and shearing action between the rotating toothed roller and the fixed inner liner. Coal-fired boilers in thermal power plants produce a large amount of slag during combustion. These slag pieces need to be discharged through a slag removal system. The single-roll slag crusher is usually arranged at the discharge port of the slag remover and used in conjunction with the slag remover, dewatering bin, and other equipment to form a complete dry or wet slag removal process. Its function is to crush the larger slag pieces discharged from the slag remover into particles suitable for subsequent conveying and unloading, preventing large slag pieces from clogging pipelines or damaging conveying equipment.

[0003] Regarding the aforementioned technologies, the inventors discovered that due to differences in coal quality, origin, and combustion conditions, the particle size distribution of the coal slag produced after combustion exhibits significant unevenness. Affected by factors such as incomplete local combustion, furnace temperature fluctuations, or abnormal air distribution, a small amount of extra-large coal slag may be generated. When such large coal slag enters a traditional single-roller slag crusher, the initial gap between the toothed roller and the fixed toothed plate, the tooth spacing, and the tooth arrangement density are typically designed for conventional particle size coal slag. This results in the large coal slag not being effectively picked up by the toothed roller, but instead repeatedly rolling and getting stuck in the crushing chamber, forming an "overload slippage" phenomenon. This not only reduces crushing efficiency but may also cause equipment vibration, toothed plate breakage, and other malfunctions. To address this problem, some large coal slag must be separately screened out for secondary crushing, which undoubtedly further reduces the overall crushing efficiency. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a grading crushing single-roller slag crusher, which facilitates the grading and crushing of large coal slag, thereby improving crushing efficiency and reducing the probability of equipment failure.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a grading crushing single-roller slag crusher, comprising: an upper shell and a lower shell, wherein a first slag crushing mechanism is installed in the upper shell and a second slag crushing mechanism is installed in the lower shell, the first slag crushing mechanism includes a fixed jaw plate and a movable jaw plate, a V-shaped crushing cavity is formed between the fixed jaw plate and the movable jaw plate, an eccentric drive assembly is installed on the top of the upper shell, a movable plate is connected to the eccentric drive assembly, the movable jaw plate is installed on one side of the movable plate, and a movable elbow assembly is connected to the other side of the movable plate;

[0006] The second crushing mechanism includes a crushing roller assembly installed below the V-shaped crushing chamber and rotatably connected to the lower housing. The crushing roller assembly has auxiliary jaw plate assemblies installed on the inner wall of the lower housing on both sides. One of the auxiliary jaw plate assemblies has an inclined plate I connected to its top, and the other auxiliary jaw plate assembly has an inclined plate II connected to its top. The top of the inclined plate I is connected to the bottom of the fixed jaw plate, and the top of the inclined plate II is connected to the inner wall of the upper housing.

[0007] A support platform is connected to the outer wall of the lower housing, and a drive mechanism that drives the eccentric drive assembly and the crushing roller assembly to rotate synchronously is installed on the support platform.

[0008] By adopting the above technical solution, the fixed jaw plate remains stationary, while the movable jaw plate reciprocates under the drive of the eccentric drive assembly, forming a V-shaped crushing chamber between them. This chamber initially crushes the incoming slag through compression. The relative movement of the movable and fixed jaw plates utilizes compression and shearing forces to break larger slag particles into smaller ones, preparing for further crushing and improving overall crushing efficiency. Furthermore, the V-shaped structure allows the slag to better aggregate and bear force during crushing, increasing the contact area and time between the slag and the crushing surface. The drive mechanism drives the eccentric drive assembly to rotate, which in turn drives the movable jaw plate in reciprocating linear motion for crushing. During this movement, the movable toggle assembly... The movement of the movable plate plays a certain limiting and guiding role, ensuring that the movable plate and the moving jaw plate will not deviate or shake excessively during the movement, making the crushing action more stable and reliable, and extending the service life of the equipment. After the slag is initially crushed by the first crushing mechanism, the drive mechanism drives the crushing roller assembly to rotate, which, together with the auxiliary jaw plate assembly, crushes the slag into finer particles to meet the particle size requirements of subsequent conveying and processing, realizes graded crushing, and improves the crushing effect and product quality. During this process, the first and second inclined plates guide the slag to flow smoothly from the first crushing mechanism into the second crushing mechanism, avoiding the accumulation or blockage of slag inside the equipment and ensuring the smooth operation of the entire crushing process.

[0009] In a preferred embodiment, the present invention can be further configured as follows: the eccentric drive assembly includes symmetrically arranged mounting bases and a drive shaft connected between the mounting bases, the two ends of the drive shaft extend to the outer side of the mounting base, an eccentric sleeve is fixedly connected to the surface of the drive shaft, the eccentric sleeve is connected to a movable plate, and a pulley is installed at each end of the drive shaft.

[0010] By adopting the above technical solution, the mounting base provides stable and balanced support for the drive shaft, ensuring that the drive shaft remains horizontal and stable during operation. During the rotation of the drive shaft, the eccentric sleeve is driven to rotate. Due to its eccentric structure, the movable plate connected to the eccentric sleeve will produce reciprocating motion up and down or left and right, providing the required motion form for the moving jaw plate, so that the moving jaw plate can cooperate with the fixed jaw plate to crush the slag.

[0011] In a preferred embodiment, the present invention can be further configured as follows: the movable elbow assembly includes a base mounted on the bottom end of the movable plate away from the movable jaw plate; a U-shaped seat is connected to the inner cavity of the upper housing; an L-shaped seat is connected to the bottom of the U-shaped seat; fitting blocks are respectively connected to the inner cavity of the base and the U-shaped seat; an elbow plate is provided between the fitting blocks; two ends of the elbow plate are respectively connected to fitting portions with a circular cross-section; the fitting portions are respectively located in the corresponding fitting blocks and rotatably connected to them; through holes are spaced apart on the L-shaped seat; movable rods are respectively provided in the through holes; a fixed plate is respectively connected to the other end of the movable rod; a hinge joint is respectively connected to the other end of the movable rod; a spring is respectively fitted on the movable rod between the fixed plate and the L-shaped seat; a buffer pad is connected to the end of the fixed plate near the spring; one end of the spring is respectively in contact with the buffer pad, and the other end is respectively in contact with the surface of the L-shaped seat; the hinge joint is respectively connected to a hinge seat through a pin; the hinge seat is respectively mounted on the base.

[0012] By adopting the above technical solution, the U-shaped seat cooperates with the structure on the base to provide track constraints for the installation and movement of the elbow plate. The structure of the U-shaped seat can limit the range of motion of the elbow plate, allowing it to move within a specific trajectory, avoiding excessive offset or swaying of the elbow plate during movement, thereby ensuring the stability of the moving jaw plate, improving the crushing effect and the service life of the equipment. Furthermore, the L-shaped seat provides installation positions for components such as the movable rod and springs, while also serving as a connection and support, further transmitting and dispersing the forces from the elbow plate and other components. The interlocking block cooperates with the interlocking parts at both ends of the elbow plate to realize the connection and relative rotation between the elbow plate and the base and the U-shaped seat. This design allows the toggle plate to rotate smoothly, reducing friction and wear and improving force transmission efficiency. In addition, during the crushing process, when the moving jaw plate is subjected to a large impact force, the movable plate drives the base to move synchronously, and the hinge joint and hinge seat drive the movable rod to extend and retract freely in the through hole. When the moving jaw plate is subjected to a large impact force, the spring will be compressed to absorb and buffer part of the impact force; when the impact force decreases or disappears, the spring will rebound, helping the moving jaw plate return to its initial position, ensuring the continuity and stability of the crushing action. Furthermore, the buffer pad further disperses and absorbs pressure, preventing excessive stress between the spring and the fixed plate, and protecting the spring and the fixed plate from damage.

[0013] In a preferred embodiment, the present invention can be further configured such that: the auxiliary jaw plate assembly includes an arc-shaped seat and toothed plates spaced apart and connected to its inner side; the upper and lower ends of the outer wall of the arc-shaped seat are respectively connected with a plurality of reinforcing ribs spaced apart; and the reinforcing ribs are connected to the inner wall of the lower housing.

[0014] By adopting the above technical solution, the toothed plates come into contact with the material, crushing the material entering the crushing chamber. The tooth shape and arrangement of the toothed plates can increase the friction and biting force with the material, improving crushing efficiency. Through the intermittent connection, a certain gap can be formed between the toothed plates, which is conducive to the passage of material and the discharge of crushed products, while also reducing mutual interference between the toothed plates.

[0015] In a preferred embodiment, the present invention can be further configured such that: the crushing roller assembly includes a drive roller rotatably connected within the lower housing, the surface of the drive roller having a plurality of crushing teeth arranged alternately, the crushing teeth being located between tooth plates when the drive roller rotates, and one end of the drive roller extending to the outside of the lower housing and connected to a pulley.

[0016] By adopting the above technical solution, the drive roller is combined with the crushing teeth to make it directly contact the material. The material is crushed into smaller particles by the force of extrusion and shearing. The staggered arrangement of the crushing teeth increases the contact area and the point of action with the material, thereby improving the crushing effect.

[0017] In a preferred embodiment, the present invention can be further configured such that the drive mechanism includes a drive motor, a hydraulic coupler, and a third pulley installed in sequence, the third pulley being connected to a first pulley and a second pulley via a belt.

[0018] By adopting the above technical solution, the drive motor is connected to pulley one and pulley two via a belt, and the power transmitted from the drive motor through the hydraulic coupling is further distributed and transmitted to various working parts of the crusher. When the drive motor starts, the hydraulic coupling can allow the motor to start under no-load first. After the motor reaches the rated speed, the power is gradually transmitted to pulley three, thereby reducing the inrush current when the motor starts and protecting the motor and the power grid.

[0019] In summary, this utility model includes at least one of the following beneficial technical effects of a grading crusher with a single roller:

[0020] 1. By setting up crushing mechanism one and crushing mechanism two, the slag is crushed in stages. The drive mechanism reciprocates under the drive of the eccentric drive component, and works with the fixed jaw plate to squeeze and shear the slag to crush it in the initial stage. After the slag is crushed in the initial stage by crushing mechanism one, the drive mechanism drives the crushing roller assembly to rotate, and works with the auxiliary jaw plate assembly to crush the slag into finer particles to meet the particle size requirements of subsequent conveying and processing, thereby achieving staged crushing and improving crushing effect and product quality.

[0021] 2. Inclined plate one and inclined plate two guide the slag from slag crushing mechanism one into slag crushing mechanism two. Through the drive roller and slag crushing teeth, the teeth of the auxiliary jaw plate assembly come into direct contact with the material. Through the action of squeezing, shearing and other forces, the material is crushed into smaller particles, further improving the crushing effect. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 for Figure 1 Sectional view at point AA;

[0025] Figure 3 This is a schematic diagram of the movable elbow assembly of this utility model.

[0026] In the diagram: 1. Upper shell; 2. Lower shell; 30. Crushing mechanism one; 40. Crushing mechanism two; 5. Support platform; 60. Drive mechanism;

[0027] 31. Fixed jaw plate; 32. Movable jaw plate; 33. V-shaped crushing chamber; 34. Eccentric drive assembly; 35. Movable plate; 36. Movable elbow assembly;

[0028] 41. Crushing roller assembly; 42. Auxiliary jaw plate assembly; 43. Inclined plate one; 44. Inclined plate two;

[0029] 61. Drive motor; 62. Hydraulic coupling; 63. Belt pulley three;

[0030] 341. Mounting base; 342. Drive shaft; 343. Eccentric sleeve; 344. Pulley 1;

[0031] 361. Base; 362. U-shaped seat; 363. L-shaped seat; 364. Fitting block; 365. Elbow plate; 366. Fitting part; 367. Through hole; 368. Movable rod; 369. Fixed plate; 36a. Hinge joint; 36b. Spring; 36c. Buffer pad; 36d. Hinge seat;

[0032] 411. Drive roller; 412. Crushing teeth; 413. Pulley 2;

[0033] 421. Arc-shaped seat; 422. Toothed plate; 423. Reinforcing rib. Detailed Implementation

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0035] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] Reference Figure 1-3 This utility model discloses a grading crushing single-roller slag crusher, comprising: an upper shell 1 and a lower shell 2. A slag crushing mechanism 30 is installed inside the upper shell 1, and a slag crushing mechanism 40 is installed inside the lower shell 2. The slag crushing mechanism 30 includes a fixed jaw plate 31 and a movable jaw plate 32, forming a V-shaped crushing cavity 33 between the fixed jaw plate 31 and the movable jaw plate 32. An eccentric drive assembly 34 is installed on the top of the upper shell 1, and a movable plate 35 is connected to the eccentric drive assembly 34. The movable jaw plate 32 is installed on one side of the movable plate 35, and a movable elbow assembly 36 is connected to the other side of the movable plate 35. The slag crushing mechanism 40 includes a crushing roller assembly 41 installed below the V-shaped crushing cavity 33 and rotatably connected to the lower shell 2. Auxiliary jaw plate assemblies 42 are respectively installed on both sides of the crushing roller assembly 41 on the inner wall of the lower shell 2. An inclined plate 43 is connected to the top of the auxiliary jaw plate assembly 42, and an inclined plate 44 is connected to the top of the other auxiliary jaw plate assembly 42. The top of the inclined plate 43 is connected to the bottom of the fixed jaw plate 31, and the top of the inclined plate 44 is connected to the inner wall of the upper housing 1. A support platform 5 is connected to the outer wall of the lower housing 2. A drive mechanism 60 that drives the eccentric drive assembly 34 and the crushing roller assembly 41 to rotate synchronously is installed on the support platform 5. The eccentric drive assembly 34 includes symmetrically arranged mounting seats 341 and a drive shaft 342 connected between the mounting seats 341. Both ends of the drive shaft 342 extend to the outer side of the mounting seats 341 respectively. An eccentric sleeve 343 is fixedly connected to the surface of the drive shaft 342. The eccentric sleeve 343 is connected to the movable plate 35. A pulley 344 is installed at both ends of the drive shaft 342 respectively.

[0037] The fixed jaw plate 31 remains stationary, while the movable jaw plate 32 reciprocates under the drive of the eccentric drive assembly 34, forming a V-shaped crushing chamber 33 between them. This chamber initially crushes the incoming slag. The eccentric drive assembly 34 is driven to rotate by the drive mechanism 60, which in turn drives the reciprocating linear motion of the movable jaw plate 32 relative to the motion of the fixed jaw plate 31. The larger slag particles are crushed into smaller particles using compression and shearing forces. After the slag is initially crushed by the first crushing mechanism 30, the first inclined plate 43 and the second inclined plate 44 guide the slag to flow smoothly from the first crushing mechanism 30 into the second crushing mechanism 40. The drive mechanism 60 drives the crushing roller assembly 41 to rotate, which, in conjunction with the auxiliary jaw plate assembly 42, crushes the slag into even finer particles to meet the particle size requirements for subsequent conveying and processing, achieving graded crushing and improving the crushing effect.

[0038] The movable elbow assembly 36 includes a base 361 mounted on the bottom end of the movable plate 35 away from the movable jaw plate 32. A U-shaped seat 362 is connected to the inner cavity of the upper housing 1. An L-shaped seat 363 is connected to the bottom of the U-shaped seat 362. Fitting blocks 364 are connected to the inner cavity of the base 361 and the U-shaped seat 362, respectively. An elbow plate 365 is provided between the fitting blocks 364. Both ends of the elbow plate 365 are connected to fitting portions 366 with circular cross-sections. The fitting portions 366 are located within and rotatably connected to the corresponding fitting blocks 364. Through holes 367 are spaced apart on the L-shaped seat 363. Movable rods 368 are respectively provided within the through holes 367. The other end of each movable rod 368 is connected to a fixed plate 369. The end is connected to a hinge joint 36a. A spring 36b is respectively provided between the fixed plate 369 and the L-shaped seat 363 and is fitted on the movable rod 368. A buffer pad 36c is connected to one end of the fixed plate 369 near the spring 36b. One end of the spring 36b is in contact with the buffer pad 36c and the other end is in contact with the surface of the L-shaped seat 363. The hinge joint 36a is connected to a hinge seat 36d through a pin. The hinge seat 36d is respectively installed on the base 361. The auxiliary jaw plate assembly 42 includes an arc-shaped seat 421 and toothed plates 422 that are spaced apart on its inner side. Several reinforcing ribs 423 are spaced apart on the upper and lower ends of the outer wall of the arc-shaped seat 421. The reinforcing ribs 423 are connected to the inner wall of the lower housing 2.

[0039] The base 361 serves as the connecting carrier between the movable elbow assembly 36 and the movable plate 35, transmitting the force of the movable plate 35. The U-shaped seat 362 and the L-shaped seat 363 form a static support frame. When the movable jaw plate 32 swings back and forth, the fitting part 366 can rotate flexibly within the fitting block 364 to adapt to the swing angle changes of the movable plate 35, avoiding jamming or breakage caused by rigid connection. When the movable jaw plate 32 squeezes the slag and generates a reaction force, the spring 36b is compressed, absorbing the impact energy through elastic deformation. The rigid support of the elbow plate 365, combined with the elastic buffer of the spring 36b, significantly reduces the vibration impact during crushing, protects the connection structure between the eccentric drive assembly 34 and the upper housing 1, and reduces the equipment failure rate. The arc-shaped seat 421 adopts an arc-shaped design that matches the crushing roller assembly 41, so that the inner side and the surface of the crushing roller assembly 41 are adapted to the crushing process of the slag from coarse to fine. During its rotation, the toothed plate 422 enhances the shearing effect on the slag, improving the fine crushing efficiency.

[0040] The crushing roller assembly 41 includes a drive roller 411 rotatably connected inside the lower housing 2. The surface of the drive roller 411 is provided with a plurality of crushing teeth 412 arranged alternately. When the drive roller 411 rotates, the crushing teeth 412 are located between the tooth plates 422. One end of the drive roller 411 extends to the outside of the lower housing 2 and is connected to a pulley 413.

[0041] The drive roller 411 provides power output for the secondary crushing through rotational motion and forms a concentric arc gap with the arc seat 421 of the auxiliary jaw plate assembly 42, ensuring that the slag is uniformly compressed in the crushing area. Furthermore, under the action of the staggered arrangement of the crushing teeth 412 and their cooperation with the tooth plate 422, the shearing ability of the slag is enhanced, which greatly improves the fine crushing efficiency and crushing uniformity, ensuring that the output slag particle size meets the requirements of the subsequent slag conveying system.

[0042] The drive mechanism 60 includes a drive motor 61, a hydraulic coupler 62, and a third pulley 63 installed in sequence. The third pulley 63 is connected to the first pulley 344 and the second pulley 413 via a belt.

[0043] The drive motor 61 is preferably a hydraulic motor. The pulley 3 63 serves as a power distribution node. It is connected to the pulley 344 of the crushing mechanism 1 30 via a belt to drive the eccentric drive assembly 34 and the pulley 413 of the crushing mechanism 2 40 to drive the crushing roller assembly 41 to rotate, thereby synchronously driving the two-stage crushing mechanisms to perform crushing operations.

[0044] The implementation principle of this embodiment is as follows: During use, the discharged slag enters the V-shaped crushing chamber 33 through the top of the upper shell 1. At this time, the drive motor 61 operates, and its power is transmitted to the pulley 3 63 via the hydraulic coupler 62. The pulley 3 63 drives the pulley 1 344 to rotate via the belt, thereby causing the eccentric drive assembly 34 to rotate. Subsequently, the drive shaft 342 drives the eccentric sleeve 343 to rotate, causing the moving jaw plate 32 to also perform eccentric reciprocating linear motion. When the moving jaw plate 32 approaches the fixed jaw plate 31, it generates squeezing and shearing forces on the slag, crushing the larger slag particles into smaller particles, completing the initial crushing. At the same time, during the crushing process, the moving jaw plate 32 is impacted, and the fitting parts 366 at both ends of the elbow plate 365 rotate flexibly within the fitting block 364 to adapt to the swing angle changes of the movable plate 35, avoiding jamming caused by rigid connection. Or it may break, and at the same time the movable rod 368 can freely extend and retract within the through hole 367, the spring 36b is compressed, absorbing and buffering part of the impact force. When the impact force decreases or disappears, the spring 36b rebounds, helping the movable jaw plate 32 to return to its initial position. After the slag is initially crushed by the slag crushing mechanism 30, it flows smoothly into the slag crushing mechanism 40 under the guidance of the inclined plate 43 and the inclined plate 44. Since the pulley 63 drives the pulley 413 to rotate through the belt, it drives the drive roller 411 in the crushing roller assembly 41 to rotate. The crushing teeth 412 and the tooth plate 422 cooperate with each other to further squeeze and shear the slag entering the slag crushing mechanism 40, crushing the slag into finer particles to meet the particle size requirements of subsequent conveying and processing, realizing graded crushing, thereby improving the crushing effect and product quality.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A grading crushing type single-roller slag crusher, characterized in that, include: The upper shell (1) and the lower shell (2) are provided. The upper shell (1) is equipped with a crushing mechanism 1 (30) and the lower shell (2) is equipped with a crushing mechanism 2 (40). The crushing mechanism 1 (30) includes a fixed jaw plate (31) and a movable jaw plate (32). A V-shaped crushing chamber (33) is formed between the fixed jaw plate (31) and the movable jaw plate (32). An eccentric drive assembly (34) is installed on the top of the upper shell (1). A movable plate (35) is connected to the eccentric drive assembly (34). The movable jaw plate (32) is installed on one side of the movable plate (35). A movable elbow assembly (36) is connected to the other side of the movable plate (35). The second crushing mechanism (40) includes a crushing roller assembly (41) installed below the V-shaped crushing chamber (33) and rotatably connected to the lower housing (2). The crushing roller assembly (41) has auxiliary jaw plate assemblies (42) installed on the inner wall of the lower housing (2) on both sides. One of the auxiliary jaw plate assemblies (42) is connected to the top of an inclined plate (43), and the other auxiliary jaw plate assembly (42) is connected to the top of an inclined plate (44). The top of the inclined plate (43) is connected to the bottom of the fixed jaw plate (31), and the top of the inclined plate (44) is connected to the inner wall of the upper housing (1). A support platform (5) is connected to the outer wall of the lower housing (2), and a drive mechanism (60) is installed on the support platform (5) to drive the eccentric drive assembly (34) and the crushing roller assembly (41) to rotate synchronously.

2. The single-roll crusher for graded crushing according to claim 1, characterized in that, The eccentric drive assembly (34) includes symmetrically arranged mounting bases (341) and drive shafts (342) connected between the mounting bases (341). Both ends of the drive shaft (342) extend to the outside of the mounting bases (341). An eccentric sleeve (343) is fixedly connected to the surface of the drive shaft (342). The eccentric sleeve (343) is connected to the movable plate (35). A pulley (344) is installed at both ends of the drive shaft (342).

3. A grading crushing single-roller slag crusher according to claim 1, characterized in that, The movable elbow assembly (36) includes a base (361) mounted on the bottom end of the movable plate (35) away from the movable jaw plate (32). A U-shaped seat (362) is connected to the inner cavity of the upper housing (1). An L-shaped seat (363) is connected to the bottom of the U-shaped seat (362). A fitting block (364) is connected to the inner cavity of the base (361) and the U-shaped seat (362). An elbow plate (365) is provided between the fitting blocks (364). A fitting part (366) with a circular cross-section is connected to both ends of the elbow plate (365). The fitting parts (366) are located in the corresponding fitting blocks (364) and are rotatably connected to them. Through holes (367) are spaced apart on the L-shaped seat (363). Each component is provided with a movable rod (368), the other end of which is connected to a fixed plate (369). The other end of the movable rod (368) is connected to a hinge joint (36a). A spring (36b) fitted on the movable rod (368) is provided between the fixed plate (369) and the L-shaped seat (363). A buffer pad (36c) is connected to the end of the fixed plate (369) near the spring (36b). One end of the spring (36b) is in contact with the buffer pad (36c), and the other end is in contact with the surface of the L-shaped seat (363). The hinge joint (36a) is connected to a hinge seat (36d) through a pin. The hinge seat (36d) is installed on the base (361).

4. A grading crushing single-roller slag crusher according to claim 2, characterized in that, The auxiliary jaw plate assembly (42) includes an arc-shaped seat (421) and toothed plates (422) spaced apart on its inner side. Several reinforcing ribs (423) are spaced apart on the upper and lower ends of the outer wall of the arc-shaped seat (421). The reinforcing ribs (423) are connected to the inner wall of the lower shell (2).

5. A grading crushing single-roller slag crusher according to claim 4, characterized in that, The crushing roller assembly (41) includes a drive roller (411) rotatably connected in the lower housing (2). The surface of the drive roller (411) is provided with a plurality of crushing teeth (412) arranged alternately. When the drive roller (411) rotates, the crushing teeth (412) are located between the tooth plates (422). One end of the drive roller (411) extends to the outside of the lower housing (2) and is connected to a pulley (413).

6. A staged crushing single-roller slag crusher according to claim 5, characterized in that, The drive mechanism (60) includes a drive motor (61), a hydraulic coupler (62), and a third pulley (63) installed in sequence. The third pulley (63) is connected to the first pulley (344) and the second pulley (413) via a belt.

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