A raw material crushing device for terrazzo production with screening function

Abstract

This invention discloses a raw material crushing device for terrazzo production with screening function, relating to the field of raw material crushing technology. It includes a machine body with a feed inlet at the top and a discharge outlet at the bottom. Supports are symmetrically arranged on both sides of the machine body. The machine body contains a pre-crushing chamber and a crushing chamber. A pre-crushing component is installed in the pre-crushing chamber, and a crushing component is installed in the crushing chamber. Terrazzo raw materials are fed into the pre-crushing chamber through the feed inlet. The pre-crushing component then pre-crushes the raw materials. After pre-crushing, the stone is fed into the crushing chamber, where a controller controls the crushing component to further crush the pre-crushed stone. Simultaneously, the crushed stone is screened within the crushing chamber. Stones that meet the size requirements are output through the discharge outlet, while those that do not meet the size requirements continue to be crushed within the crushing chamber. This improves the quality of terrazzo raw material crushing and, through multi-stage crushing, increases the efficiency of terrazzo raw material crushing.

Description

Technical Field

[0001] This invention relates to the field of raw material crushing technology, specifically to a raw material crushing device for terrazzo production with a screening function. Background Technology

[0002] Terrazzo is a building decoration material made by mixing natural minerals, waste materials, or synthetic materials (such as quartz, granite, marble, etc.) with cement, followed by curing and polishing. Terrazzo possesses excellent wear resistance, compressive strength, and aesthetic appeal, thus finding widespread application in construction, floor decoration, and other fields. Its raw materials typically include various types of minerals such as quartz sand, crushed stone, limestone, and silicates, as well as other auxiliary materials. The quality of terrazzo is closely related to the selection of its raw materials and processing technology, especially the particle size, uniformity, and compatibility with cement. To ensure the strength, durability, and appearance of terrazzo, the raw materials used must undergo processes such as crushing, screening, and pulverizing.

[0003] Existing crushing equipment often requires multiple crushing operations to achieve the required particle size when processing large pieces of ore. This not only wastes time but also increases equipment wear and reduces production efficiency. Furthermore, crushing and screening equipment are usually operated separately, requiring multiple processes and equipment to work in coordination, which increases the complexity of the system and the failure rate. Summary of the Invention

[0004] The purpose of this invention is to provide a raw material crushing device for terrazzo production with a screening function, so as to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A raw material crushing device for terrazzo production with screening function includes a machine body, a feed inlet at the top of the machine body, a discharge outlet at the bottom of the machine body, supports symmetrically arranged on both sides of the machine body, a pre-crushing chamber and a crushing chamber arranged inside the machine body, the pre-crushing chamber being located above the crushing chamber and communicating with the crushing chamber, a pre-crushing component being arranged in the pre-crushing chamber, and a crushing component being arranged in the crushing chamber.

[0007] Terrazzo raw materials are fed into the pre-crushing chamber through the feed inlet. The pre-crushing component then pre-crushes the raw materials, breaking large pieces into medium-sized stones. These medium-sized stones are then fed into the crushing chamber for further crushing. Once in the crushing chamber, the controller controls the crushing component to crush the stones again. Simultaneously, the crushed stones are screened within the crushing chamber. Stones that meet the size requirements are discharged through the outlet, while those that do not meet the size requirements continue to be crushed in the crushing chamber. This process improves the quality of terrazzo raw material crushing and increases the efficiency of terrazzo raw material crushing through multiple stages of crushing.

[0008] Preferably, the pre-crushing component consists of a plurality of rotating slots and rotating disks, with each rotating slot corresponding to a rotating disk. A drive motor is installed in each rotating slot, and the drive shaft of the drive motor is connected to the rotating disk. The rotating disk is rotatably connected to the rotating slot.

[0009] Preferably, a plurality of fixed teeth are provided on the wall surface of the rotating disk, and the plurality of fixed teeth are arranged around the axis of the rotating disk. The cross-section of the fixed teeth is low in the middle and high on both sides. A crushing needle is provided at the central recess of the fixed teeth, and pressure sensors are provided at the two high points on both sides of the fixed teeth. An electric cylinder is provided inside the fixed teeth, and the push rod of the electric cylinder is connected to the crushing needle. The crushing needle is slidably connected to the fixed teeth.

[0010] Preferably, the pre-crushing chamber is provided with a plurality of deflection grooves on the side near the feed inlet, and a deflection plate is provided in the deflection groove. The deflection plate and the deflection groove are rotatably connected, and a spring is provided between the deflection plate and the deflection groove.

[0011] Preferably, the crushing needle has several water jets on the side away from the fixed teeth, the rotating disk has several flow channels that communicate with the water jets, the machine body has a water tank on the outside, a water pump is installed in the water tank, and the water pump is connected to the flow channels through a pipe.

[0012] Before the terrazzo raw material enters the pre-crushing chamber, the controller starts the drive motor. The drive shaft of the drive motor drives the rotating disk to rotate. Several rotating disks rotate around the axis of their respective rotating slots. During the rotation of the rotating disks, the controller starts the water pump in the water storage tank. The water pump draws water and then transports it through the pipeline to the flow channel, through the flow channel to the water jet nozzle, and finally through the water jet nozzle to the pre-crushing chamber. Since there is no terrazzo raw material in the pre-crushing chamber at this time, the sprayed water jet only serves to moisten the pre-crushing chamber.

[0013] When the terrazzo raw material is fed into the pre-crushing chamber through the feed inlet, the deflector plate, previously positioned near the pre-crushing chamber by the spring, is squeezed by the raw material. The deflector plate then compresses the spring and retracts into the deflector groove. Subsequently, the raw material moves towards the rotating disc under gravity. When it contacts the fixed teeth, the pressure sensor on the fixed teeth detects the pressure signal and converts it into an electrical signal, which is transmitted to the controller. The controller then activates the electric cylinder, and the push rod in the cylinder moves the crushing needle towards the raw material. Simultaneously, the movement of the crushing needle moves the water jet, shortening the distance between it and the raw material. The sprayed water jet works in conjunction with the crushing needle to pre-crush the raw material. Furthermore, the water jet from the water jet wets the surface of the raw material, effectively reducing dust generated during crushing and preventing dust from spreading and affecting the working environment.

[0014] Several rotating discs rotate towards the side closest to the axis of the pre-crushing chamber, causing the fixed teeth to continuously move the terrazzo material towards the side closest to the crushing chamber. Simultaneously, when the terrazzo material moves downward and separates from the deflector plate, the deflector plate moves under the action of the spring and rotates again towards the side of the deflection groove closest to the pre-crushing chamber, thereby reducing the diameter of the pre-crushing chamber near the feed inlet. When the terrazzo material bounces up under the crushing action of the rotating discs, several deflector plates block the bounced terrazzo material, preventing the bounced and falling material from impacting the equipment. This increases the contact time between the terrazzo material and the rotating discs, thereby improving the crushing efficiency of the terrazzo material.

[0015] Preferably, the crushing assembly consists of two crushing rollers and a plurality of filter teeth, the plurality of filter teeth being located on the side of the crushing rollers near the discharge port, the plurality of filter teeth forming two symmetrical arcs, and a plurality of fixing rings being provided in the crushing chamber, the crushing rollers being rotatably connected to the fixing rings.

[0016] Preferably, the crushing roller consists of a fixed shaft tube and a crushing shaft. The crushing shaft is located outside the fixed shaft tube. Several crushing discs are provided on the crushing shaft. Several crushing teeth are provided on the side of the crushing discs away from the fixed shaft tube. A crushing motor is provided outside the machine body. The drive shaft of the crushing motor is connected to the crushing shaft.

[0017] Preferably, a sliding groove is provided between the two crushing discs, a collecting ring is provided in the sliding groove, a plurality of collecting ports are provided on the collecting ring, the collecting ring is rotatably connected to the sliding groove, a magnetic conductor is provided in the inner wall of the collecting port, and an electromagnetic coil is provided in the inner cavity of the crushing chamber.

[0018] Preferably, the fixed shaft tube is provided with a conveying port, which is connected to the collecting port. A fine crushing roller is provided inside the fixed shaft tube and is rotatably connected to the fixed shaft tube. A spiral plate is provided on the outer wall of the fine crushing roller. The fixed shaft tube is in contact with the inner wall of the crushing chamber. A grinding motor is provided on the outside of the machine body. The drive shaft of the grinding motor is connected to the fine crushing roller. An output port is provided on the outer wall of the crushing roller. A discharge port is provided between the two collecting ports and is connected to the discharge port.

[0019] Preferably, the two crushing shafts rotate in opposite directions, and the rotation direction of the crushing shafts is opposite to the rotation direction of the collecting ring. The distance between the side of the fine crushing roller closer to the collecting ring and the fixed shaft tube is greater than the distance between the side of the fine crushing roller farther from the collecting ring and the fixed shaft tube. Grinding teeth are provided on the inner wall of the fixed shaft tube and the outer wall of the fine crushing roller.

[0020] The pre-crushed terrazzo raw material enters the crushing chamber through the pre-crushing chamber. Before the terrazzo raw material enters the crushing chamber, the controller controls the crushing motor and grinding motor to start. The drive shaft of the crushing motor drives the crushing shaft to rotate, while the drive shaft of the grinding motor drives the fine crushing roller to rotate. At the same time, the controller controls the electromagnetic coil in the crushing chamber to be energized. The energized electromagnetic coil generates magnetic force, which attracts the magnetic conductor in the collection port, and the collection ring rotates under the influence of the magnetic force.

[0021] As the two crushing shafts rotate in opposite directions, the crushing shafts drive the crushing disc to rotate, which in turn drives several crushing teeth to rotate. The crushing teeth on both sides then squeeze and impact the terrazzo material between the two crushing rollers, crushing it. The terrazzo material with a crushing diameter smaller than the distance between two adjacent filter teeth moves through the filter teeth to the discharge port and is finally discharged through the discharge port.

[0022] Terrazzo material with a crushing diameter greater than the distance between two adjacent filter teeth and smaller than the diameter of the collection port is transported to the collection port and moves from the collection port to the conveying port. It is then transported to the fixed shaft tube. Since the fine crushing roller inside the fixed shaft tube is rotating and has several spiral plates, the terrazzo material moves from the side of the fine crushing roller closer to the collection ring to the side of the fine crushing roller farther from the collection ring. Because the distance between the side of the fine crushing roller closer to the collection ring and the fixed shaft tube is greater than the distance between the side of the fine crushing roller farther from the collection ring and the fixed shaft tube, the movement space of the terrazzo material is continuously compressed. As the terrazzo material moves, it comes into contact with the inner wall of the fixed shaft tube and the outer wall of the fine crushing roller. Since both the inner wall of the fixed shaft tube and the outer wall of the fine crushing roller are equipped with grinding teeth, the terrazzo material is further crushed. When the output port and the discharge port are connected, the further crushed terrazzo material is transported from the discharge port to the output port, and finally moves towards the filter teeth through the output port and is finally discharged through the discharge port.

[0023] During the crushing process, the water jets sprayed from the water jet nozzles crush the terrazzo raw material and then transport the crushed terrazzo fragments together into the crushing chamber. The remaining water then cools the crushing rollers, preventing them from crushing the terrazzo raw material for an extended period and causing overheating. This improves dust suppression while ensuring stable equipment operation and enhancing the quality of terrazzo raw material crushing.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The terrazzo raw material is pre-crushed by the rotating disc, fixed teeth, and crushing needles in the pre-crushing chamber, combined with the water jet from the water jet nozzle. The pre-crushed terrazzo raw material is then conveyed to the crushing chamber, where it undergoes multi-stage crushing through the cooperation of the crushing teeth, fixed shaft tube, and fine crushing rollers. During this multi-stage crushing process, terrazzo of the appropriate size is directly conveyed to the discharge port, avoiding over-crushing and thus improving the crushing quality. Simultaneously, the timely output of the terrazzo raw material prevents blockages in the crushing chamber, which could interfere with the normal operation of the equipment. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0029] Figure 4 This is an internal front view of the present invention;

[0030] Figure 5 This is a schematic diagram of the rotating disk.

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 This is a schematic diagram of the crushing roller structure;

[0033] Figure 8 This is a schematic diagram of the internal structure of the crushing roller;

[0034] Figure 9 This is a schematic diagram of the exploded structure of the crushing roller;

[0035] In the diagram: 1. Machine body; 11. Feed inlet; 12. Discharge outlet; 13. Pre-crushing chamber; 14. Crushing chamber;

[0036] 2. Pre-crushing component; 21. Rotating groove; 22. Rotating disk; 23. Fixed tooth; 24. Crushing needle; 25. Deflection groove; 26. Deflection plate; 27. Water jet; 28. Flow channel;

[0037] 3. Crushing assembly; 31. Crushing roller; 311. Output port; 32. Filter teeth; 33. Fixing ring; 34. Fixing shaft tube; 341. Conveying port; 342. Discharge port; 35. Crushing shaft; 351. Crushing disc; 352. Crushing teeth; 353. Sliding groove; 36. Collecting ring; 361. Collecting port; 37. Fine crushing roller; 371. Spiral plate. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example: Figures 1-9 As shown, the present invention provides a technical solution for a raw material crushing device for terrazzo production with screening function, including a machine body 1, a feed inlet 11 at the top of the machine body 1, a discharge outlet 12 at the bottom of the machine body 1, and supports symmetrically arranged on both sides of the machine body 1. The machine body 1 has a pre-crushing chamber 13 and a crushing chamber 14 inside, the pre-crushing chamber 13 is located above the crushing chamber 14 and is connected to the crushing chamber 14, a pre-crushing component 2 is arranged in the pre-crushing chamber 13, and a crushing component 3 is arranged in the crushing chamber 14.

[0040] In one specific embodiment of the present invention, the pre-crushing component 2 is composed of a plurality of rotating grooves 21 and rotating disks 22, wherein the rotating grooves 21 and rotating disks 22 correspond one-to-one, a drive motor is provided in the rotating grooves 21, the drive shaft of the drive motor is connected to the rotating disks 22, and the rotating disks 22 are rotatably connected to the rotating grooves 21.

[0041] In one specific embodiment of the present invention, a plurality of fixed teeth 23 are provided on the wall surface of the rotating disk 22. The plurality of fixed teeth 23 are arranged around the axis of the rotating disk 22. The cross section of the fixed teeth 23 is low in the middle and high on both sides. A crushing needle 24 is provided at the central recess of the fixed teeth 23. Pressure sensors are provided at the high points on both sides of the fixed teeth 23. An electric cylinder is provided inside the fixed teeth 23. The push rod of the electric cylinder is connected to the crushing needle 24. The crushing needle 24 is slidably connected to the fixed teeth 23.

[0042] In one specific embodiment of the present invention, a plurality of deflection grooves 25 are provided on the side of the pre-crushing chamber 13 near the feed inlet 11. A deflection plate 26 is provided in the deflection groove 25. The deflection plate 26 is rotatably connected to the deflection groove 25. A spring is provided between the deflection plate 26 and the deflection groove 25.

[0043] In one specific embodiment of the present invention, the crushing needle 24 is provided with a plurality of water cutters 27 on the side away from the fixed tooth 23, the rotating disk 22 is provided with a plurality of flow channels 28, the flow channels 28 are connected to the water cutters 27, the outside of the machine body 1 is provided with a water tank, the water tank is provided with a water pump, and the water pump is connected to the flow channels 28 through a pipe.

[0044] In one specific embodiment of the present invention, the crushing assembly 3 consists of two crushing rollers 31 and a plurality of filter teeth 32. The plurality of filter teeth 32 are located on the side of the crushing rollers 31 near the discharge port 12. The plurality of filter teeth 32 form two symmetrical arcs. A plurality of fixing rings 33 are provided in the crushing chamber 14. The crushing rollers 31 are rotatably connected to the fixing rings 33.

[0045] In one specific embodiment of the present invention, the crushing roller 31 is composed of a fixed shaft tube 34 and a crushing shaft 35. The crushing shaft 35 is located outside the fixed shaft tube 34. A plurality of crushing discs 351 are provided on the crushing shaft 35. A plurality of crushing teeth 352 are provided on the side of the crushing discs 351 away from the fixed shaft tube 34. A crushing motor is provided outside the machine body 1. The drive shaft of the crushing motor is connected to the crushing shaft 35.

[0046] In one specific embodiment of the present invention, a sliding groove 353 is provided between the two crushing discs 351, a collecting ring 36 is provided in the sliding groove 353, a plurality of collecting ports 361 are provided on the collecting ring 36, the collecting ring 36 is rotatably connected to the sliding groove 353, a magnetic conductor is provided in the inner wall of the collecting port 361, an electromagnetic coil is provided in the inner cavity of the crushing chamber 14, and the two crushing shafts 35 rotate in opposite directions, the rotation direction of the crushing shafts 35 is opposite to the rotation direction of the collecting ring 36.

[0047] In one specific embodiment of the present invention, a conveying port 341 is provided on the fixed shaft tube 34, which is connected to the collecting port 361. A fine crushing roller 37 is provided inside the fixed shaft tube 34 and is rotatably connected to the fixed shaft tube 34. A spiral plate 371 is provided on the outer wall of the fine crushing roller 37. The fixed shaft tube 34 is in contact with the inner wall of the crushing chamber 14. A grinding motor is provided outside the machine body 1. The drive shaft of the grinding motor is connected to the fine crushing roller 37. An output port 311 is provided on the outer wall of the crushing roller 31. A discharge port 342 is provided between the two collecting ports 361 and is connected to the output port 311. The distance between the side of the fine crushing roller 37 near the collecting ring 36 and the fixed shaft tube 34 is greater than the distance between the side of the fine crushing roller 37 away from the collecting ring 36 and the fixed shaft tube 34. Grinding teeth are provided on both the inner wall of the fixed shaft tube 34 and the outer wall of the fine crushing roller 37.

[0048] Working principle of the invention:

[0049] Before the terrazzo raw material enters the pre-crushing chamber 13, the controller controls the drive motor to start. The drive shaft of the drive motor drives the rotating disk 22 to rotate. Several rotating disks 22 rotate around the axis of their respective rotating slots 21. During the rotation of the rotating disks 22, the controller controls the water pump in the water storage tank to start. The water pump draws water and then transports it through the pipe box flow channel 28. It is then transported through the flow channel 28 to the water cutter 27 and finally output to the pre-crushing chamber 13 through the water cutter 27. Since there is no terrazzo raw material in the pre-crushing chamber 13 at this time, the sprayed water column only serves to moisten the pre-crushing chamber 13.

[0050] When the terrazzo raw material is fed into the pre-crushing chamber 13 through the feed inlet 11, the deflecting plate 26, which was previously positioned on the side of the deflection groove 25 near the pre-crushing chamber 13 under the action of the spring, is squeezed by the terrazzo raw material after entering the pre-crushing chamber 13. Subsequently, the deflecting plate 26 is compressed by the spring and then retracts into the deflection groove 25. Then, the terrazzo raw material moves towards the side closer to the rotating disk 22 under the action of gravity. When the terrazzo raw material comes into contact with the fixed teeth 23, the pressure sensor on the fixed teeth 23 detects the pressure signal and converts the pressure signal into... The electrical signal is transmitted to the controller, which then controls the electric cylinder to start. The push rod in the electric cylinder drives the crushing needle 24 to move. The crushing needle 24 moves toward the terrazzo raw material. At the same time, when the crushing needle 24 moves, it drives the water jet 27 to move, which shortens the distance between the water jet 27 and the terrazzo raw material. The water jet sprayed out cooperates with the crushing needle 24 to pre-crush the terrazzo raw material. The water jet sprayed out by the water jet 27 wets the surface of the terrazzo raw material, thereby achieving dust suppression treatment of the dust generated during the crushing of the terrazzo raw material.

[0051] Several rotating disks 22 rotate toward the side closer to the axis of the pre-crushing chamber 13, causing the fixed teeth 23 to continuously move the terrazzo material toward the side closer to the crushing chamber 14. At the same time, when the terrazzo material moves downward and the pre-deflection plate 26 disengages, the deflection plate 26 moves under the action of the spring and rotates again toward the side of the deflection groove 25 closer to the pre-crushing chamber 13, thereby reducing the diameter of the pre-crushing chamber 13 near the feed inlet 11. When the terrazzo material bounces up under the crushing action of the rotating disks 22, several deflection plates 26 block the bounced terrazzo material, preventing the bounce and fall of the terrazzo material from impacting the equipment, thus increasing the contact time between the terrazzo material and the rotating disks 22.

[0052] The pre-crushed terrazzo raw material enters the crushing chamber 14 through the pre-crushing chamber 13. Before the terrazzo raw material enters the crushing chamber 14, the controller controls the crushing motor and the grinding motor to start. The drive shaft of the crushing motor drives the crushing shaft 35 to rotate, while the drive shaft of the grinding motor drives the fine crushing roller 37 to rotate. At the same time, the controller controls the electromagnetic coil in the crushing chamber 14 to be energized. The energized electromagnetic coil generates magnetic force, which attracts the magnetic conductor in the collection port 361, and the collection ring 36 rotates under the influence of the magnetic force.

[0053] Since the two crushing shafts 35 rotate in opposite directions, the crushing shafts 35 rotate and drive the crushing disc 351 to rotate. In turn, the crushing disc 351 rotates and drives several crushing teeth 352 to rotate. The crushing teeth 352 on both sides squeeze and impact the terrazzo material between the two crushing rollers 31 to crush it. The terrazzo material with a crushing diameter smaller than the distance between two adjacent filter teeth 32 moves to the discharge port 12 through the filter teeth 32 and is finally discharged through the discharge port 12.

[0054] Terrazzo material with a crushing diameter greater than the distance between two adjacent filter teeth 32 and smaller than the diameter of the collection port 361 is conveyed to the collection port 361. It then moves through the collection port 361 to the conveying port 341, and is conveyed through the conveying port 341 to the fixed shaft tube 34. Since the fine crushing roller 37 inside the fixed shaft tube 34 is rotating and has several spiral plates 371, the terrazzo material moves from the side of the fine crushing roller 37 closest to the collection ring 36 to the side of the fine crushing roller 37 furthest from the collection ring 36. Because the distance between the side of the fine crushing roller 37 closest to the collection ring 36 and the fixed shaft tube 34 is greater than the diameter of the filter teeth 32, the terrazzo material is conveyed to the collection port 361. The distance between the side of the crushing roller 37 away from the collecting ring 36 and the fixed shaft tube 34 causes the moving space of the terrazzo raw material to be continuously compressed. As a result, the terrazzo raw material comes into contact with the inner wall of the fixed shaft tube 34 and the outer wall of the crushing roller 37 when it moves. Since the inner wall of the fixed shaft tube 34 and the outer wall of the crushing roller 37 are both provided with grinding teeth, the terrazzo raw material is further squeezed and crushed. When the output port 311 and the discharge port 342 are in a connected state, the further crushed terrazzo raw material is conveyed from the discharge port 342 to the output port 311, and finally moves to the filter teeth 32 through the output port 311, and is finally output through the discharge port 12.

[0055] During the crushing process, the water jet sprayed from the water jet nozzle 27 crushes the terrazzo raw material and then transports the crushed terrazzo raw material fragments together to the crushing chamber 14. The water left behind then cools down the crushing roller 31, preventing the crushing roller 31 from crushing the terrazzo raw material for a long time and causing overheating.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A raw material crushing device for terrazzo production with screening function, characterized in that: The machine includes a body (1), with a feed inlet (11) at the top and a discharge outlet (12) at the bottom. Supports are symmetrically arranged on both sides of the body (1). The machine body (1) has a pre-crushing chamber (13) and a crushing chamber (14) inside. The pre-crushing chamber (13) is located above the crushing chamber (14) and is connected to the crushing chamber (14). A pre-crushing component (2) is arranged in the pre-crushing chamber (13), and a crushing component (3) is arranged in the crushing chamber (14). The crushing assembly (3) consists of two crushing rollers (31) and a number of filter teeth (32). The number of filter teeth (32) are located on the side of the crushing rollers (31) near the discharge port (12). The number of filter teeth (32) form two symmetrical arcs. A number of fixing rings (33) are provided in the crushing chamber (14). The crushing rollers (31) are rotatably connected to the fixing rings (33). The crushing roller (31) is composed of a fixed shaft tube (34) and a crushing shaft (35). The crushing shaft (35) is located outside the fixed shaft tube (34). A plurality of crushing discs (351) are provided on the crushing shaft (35). A plurality of crushing teeth (352) are provided on the side of the crushing discs (351) away from the fixed shaft tube (34). A crushing motor is provided outside the machine body (1). The drive shaft of the crushing motor is connected to the crushing shaft (35). A sliding groove (353) is provided between the two crushing discs (351), and a collecting ring (36) is provided in the sliding groove (353). The collecting ring (36) is provided with a plurality of collecting ports (361). The collecting ring (36) is rotatably connected to the sliding groove (353). A magnetic conductor is provided in the inner wall of the collecting port (361). An electromagnetic coil is provided in the inner cavity of the crushing chamber (14). The fixed shaft tube (34) is provided with a conveying port (341), which is connected to the collection port (361). The fixed shaft tube (34) is provided with a fine crushing roller (37), which is rotatably connected to the fixed shaft tube (34). The outer wall of the fine crushing roller (37) is provided with a spiral plate (371). The fixed shaft tube (34) is in contact with the inner wall of the crushing chamber (14). The outside of the machine body (1) is provided with a grinding motor, and the drive shaft of the grinding motor is connected to the fine crushing roller (37). The outer wall of the crushing roller (31) is provided with an output port (311). The two collection ports (361) are provided with a discharge port (342), which is connected to the discharge port (342). The two crushing shafts (35) rotate in opposite directions, and the rotation direction of the crushing shafts (35) is opposite to the rotation direction of the collecting ring (36). The distance between the side of the fine crushing roller (37) close to the collecting ring (36) and the fixed shaft tube (34) is greater than the distance between the side of the fine crushing roller (37) away from the collecting ring (36) and the fixed shaft tube (34). Grinding teeth are provided on the inner wall of the fixed shaft tube (34) and the outer wall of the fine crushing roller (37).

2. The raw material crushing device for terrazzo production with screening function according to claim 1, characterized in that: The pre-crushing component (2) consists of several rotating slots (21) and rotating disks (22). The rotating slots (21) and rotating disks (22) correspond one-to-one. A drive motor is installed in the rotating slot (21). The drive shaft of the drive motor is connected to the rotating disk (22). The rotating disk (22) and the rotating slot (21) are rotatably connected.

3. The raw material crushing device for terrazzo production with screening function according to claim 2, characterized in that: The rotating disk (22) has several fixed teeth (23) arranged around the axis of the rotating disk (22). The cross-section of the fixed teeth (23) is low in the middle and high on both sides. A crushing needle (24) is provided in the central recess of the fixed teeth (23). Pressure sensors are provided on the two high sides of the fixed teeth (23). An electric cylinder is provided inside the fixed teeth (23). The push rod of the electric cylinder is connected to the crushing needle (24). The crushing needle (24) is slidably connected to the fixed teeth (23).

4. The raw material crushing device for terrazzo production with screening function according to claim 1, characterized in that: The pre-crushing chamber (13) is provided with a number of deflection grooves (25) on the side near the feed inlet (11). A deflection plate (26) is provided in the deflection groove (25). The deflection plate (26) is rotatably connected to the deflection groove (25). A spring is provided between the deflection plate (26) and the deflection groove (25).

5. The raw material crushing device for terrazzo production with screening function according to claim 3, characterized in that: The crushing needle (24) has several water jets (27) on the side away from the fixed tooth (23). The rotating disk (22) has several flow channels (28) connected to the water jets (27). The machine body (1) has a water tank on the outside. The water tank has a water pump connected to the flow channels (28) through a pipe.

Images