Sand screening equipment with crushing function

Abstract

The application relates to the technical field of sand screening equipment, and provides sand screening equipment with a crushing function, which comprises a shell, a multistage crushing module and a blockage-preventing vibrating screening module arranged in the shell, the multistage crushing module comprises a primary crushing unit and a secondary crushing unit; the primary crushing unit comprises an upper layer of sawtooth groups and a lower layer of sawtooth groups which are arranged on the top of a sand shell and staggered in an up-down direction, and a first driving assembly which drives the upper layer of sawtooth groups and the lower layer of sawtooth groups to move towards each other or away from each other, the secondary crushing unit comprises a pair of crushing rollers which are arranged below the lower layer of sawtooth groups, and a second driving assembly which drives the crushing rollers to realize reverse rotation, and the surface of the crushing rollers is provided with crushing teeth. The shear action of the upper and lower staggered sawtooth groups of the primary crushing unit realizes primary crushing of sand and stones, the reverse-rotating crushing rollers of the secondary crushing unit perform secondary extrusion crushing on the sand and stones, and the crushing efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of sand screening equipment, and in particular to a sand screening equipment with crushing function. Background Technology

[0002] Concrete, a widely used material in civil engineering, plays a crucial role in the safety and durability of projects. Cement concrete, also known as ordinary concrete, is made by mixing cement as a binder, sand and gravel as aggregates, and water in a specific ratio. Sand is an indispensable key material in the concrete preparation process, and its quality directly affects the performance of the concrete. Therefore, the sand screening process is crucial for ensuring concrete quality. With the continuous development of civil engineering, the requirements for concrete quality are becoming increasingly stringent, making sand screening equipment increasingly important in the concrete preparation process.

[0003] In existing concrete premixing equipment, screens are typically used to separate sand and gravel. Generally, the sand and gravel are placed on the screen, and the qualified sand particles are forced through the screen openings by gravity or simple vibration. Some equipment further improves screening efficiency by increasing the frequency or amplitude of vibration.

[0004] Existing concrete screening and pre-mixing equipment suffers from a problem where sand and gravel easily get stuck on the screening mesh. This not only reduces screening efficiency, resulting in a smaller amount of sand and gravel that can be screened per unit time, but also adversely affects subsequent concrete processing, making it difficult to effectively guarantee the quality of the concrete. Therefore, further improvements are needed. Utility Model Content

[0005] To address the above problems, this application provides a sand screening device with crushing function.

[0006] This application provides a sand screening device with crushing function, which adopts the following technical solution: A sand screening device with crushing function includes a shell, a multi-stage crushing module and an anti-clogging vibrating screening module disposed within the shell. The multi-stage crushing module includes a primary crushing unit and a secondary crushing unit. The primary crushing unit includes an upper and a lower sawtooth group disposed at the top of the sand shell and arranged in an alternating manner, as well as a first driving component that drives the upper and lower sawtooth groups to move toward each other or away from each other. The secondary crushing unit includes a pair of crushing rollers disposed below the lower sawtooth group and a second driving component that drives the crushing rollers to rotate in opposite directions. The surface of the crushing rollers is provided with crushing teeth. The anti-clogging vibrating screening module includes a first screen plate between the lower sawtooth group and the crushing rollers, a second screen plate disposed below the crushing rollers, and a vibrating component for driving the second screen plate to vibrate. The aperture of the second screen plate is smaller than that of the first screen plate.

[0007] By adopting the above technical solution, a multi-stage crushing module and an anti-clogging vibrating screen module are set up inside the shell. In the primary crushing unit, the upper and lower sawtooth groups, distributed alternately, achieve primary crushing of sand and gravel through the shearing action of the sawtooth groups. The secondary crushing unit's counter-rotating crushing rollers further crush the sand and gravel through compression, improving crushing efficiency. The second screen plate vibrates under the action of the vibrating components, and its surface screen hole diameter is smaller than that of the first screen plate. Combined with the impact force of falling sand and gravel, this effectively prevents screen hole clogging, enhancing the anti-clogging capability of the sand screening equipment.

[0008] Preferably, the crushing teeth are spirally distributed around the length of the crushing roller.

[0009] By adopting the above technical solution, the spirally distributed crushing teeth can perform more thorough secondary crushing of some sand and gravel when the crushing roller rotates in the opposite direction, thereby improving the crushing efficiency.

[0010] Preferably, the first drive assembly includes a connecting block connected to the upper sawtooth group and the lower sawtooth group, a bidirectional threaded screw threaded through the two connecting blocks, and a drive component for driving the bidirectional threaded screw to rotate, wherein the connecting block is slidably connected to the housing.

[0011] By adopting the above technical solution, when the bidirectional threaded screw rotates, it can drive the connecting block to slide inside the housing, causing the upper and lower sawtooth groups to move towards each other or away from each other, generating a shearing action, realizing the primary crushing of sand and gravel, and improving the crushing efficiency.

[0012] Preferably, the driving component includes a drive motor, a driving pulley connected to the output shaft of the drive motor, a driven pulley rotatably connected to the housing, and a transmission belt wound around the driving pulley and the driven pulley; the second driving assembly includes a first bevel gear coaxially connected to the driving pulley, a second bevel gear meshing with the first bevel gear, a first sprocket connected to the second bevel gear, a second sprocket rotatably connected to the side wall of the housing, and a chain wound around the first sprocket and the second sprocket.

[0013] By adopting the above technical solution, the drive component uses a combination of a drive motor, a driving pulley, a driven pulley, and a transmission belt. This combination stably transmits the power of the drive motor to the bidirectional threaded screw, driving the upper and lower sawtooth groups to produce shearing action, thus achieving primary crushing of sand and gravel. The second drive assembly utilizes a first bevel gear coaxially connected to the driving pulley, a meshing second bevel gear, a first sprocket, a second sprocket, and a chain to transmit power to the crushing roller, causing the crushing roller to rotate in the opposite direction. This power transmission structure is simple and efficient, ensuring stable operation of the primary and secondary crushing units, improving the crushing efficiency of sand and gravel. Simultaneously, a single drive motor enables the driving of different components in the multi-stage crushing module, optimizing energy consumption.

[0014] Preferably, a top rod is provided on the upper surface of the first sieve plate, and the upper end of the top rod is connected to the upper serration group / lower serration group.

[0015] By adopting the above technical solution, a top rod is provided on the upper surface of the first screen plate and connected to the upper or lower sawtooth group, so that the first screen plate vibrates synchronously when the sawtooth group moves, which accelerates the passage of qualified sand particles through the screen holes of the first screen plate and improves the crushing efficiency and screening efficiency.

[0016] Preferably, the vibration assembly includes a telescopic rod connected to the lower surface of the second sieve plate and a spring coaxially sleeved outside the telescopic rod, the lower ends of the telescopic rod and the spring being connected to the inner bottom wall of the housing.

[0017] By adopting the above technical solution, the spring of the vibration component is sleeved on the outside of the telescopic rod to form an elastic buffer structure. The impact force of falling sand and gravel triggers the second screen plate to vibrate up and down, preventing the screen holes from clogging and enhancing the anti-clogging capability.

[0018] Preferably, the lower end of the bidirectional threaded screw extends to the bottom of the housing, a cam is coaxially sleeved on the bidirectional threaded screw, an abutment plate that abuts against the cam is provided on the side wall of the second screen plate, and the upper end of the telescopic rod is hinged to the second screen plate.

[0019] By adopting the above technical solution, the bidirectional threaded screw drives the upper and lower sawtooth groups to move, while the coaxially sleeved cam drives the second screen plate to vibrate, realizing a single power source to drive multiple stages of action, thus optimizing energy consumption; the overall structure is relatively simple, easy to maintain, and improves maintenance convenience.

[0020] Preferably, a discharge pipe is provided through the side wall of the shell, and a guide plate is provided below the second screen plate. The end of the guide plate near the discharge pipe is inclined downward and the guide plate is wavy.

[0021] By adopting the above technical solution, the guide plate of the sand screening equipment is designed with a wave-shaped surface and is inclined, so that the sand and gravel will generate a spiral motion along the surface of the guide plate during the vibrating screening process, which will extend the screening path, thereby enhancing the anti-clogging ability and improving the crushing efficiency.

[0022] In summary, this application has the following beneficial effects: 1. The use of staggered sawtooth groups and counter-rotating crushing rollers for multi-stage crushing of sand and gravel improves crushing efficiency; 2. Vibration is generated synchronously during the lifting and lowering of the first screen plate. The bottom of the second screen plate is supported by a combination of springs and telescopic rods and the vibration is triggered by the impact force of falling sand and gravel. The guide plate adopts a wave-shaped surface design to make the sand and gravel spiral, which enhances the anti-clogging ability. 3. The main drive motor is connected to the double threaded rod and the crushing roller simultaneously through the pulley set. The lifting and lowering motion of the lifting rod is mechanically linked with the vibration of the screen plate through the cam mechanism, realizing the driving of multiple stages of action by a single power source and optimizing energy consumption. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application; Figure 3 This is a side view structural diagram of an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the first gear and the second gear in an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Shell; 11. Mounting block; 12. Mounting plate; 13. Feed pipe; 14. Discharge pipe; 15. Guide plate; 2. Multi-stage crushing module; 3. Anti-clogging vibrating screen module; 31. First screen plate; 311. Top rod; 32. Second screen plate; 321. Abutment plate; 33. Vibration assembly; 331. Telescopic rod; 332. Spring; 4. Primary crushing unit; 5. Secondary crushing unit; 51. Crushing roller; 511. Crushing tooth; 512. Rotating shaft; 513. ... 514. Gear 1; 52. Second gear 2; 52. Second drive assembly 3; 521. First bevel gear 4; 522. Second bevel gear 523. First sprocket 524. Second sprocket 525. Chain 6; Upper sawtooth group 7; Lower sawtooth group 8; First drive assembly 9; 81. Connecting block 10; 82. Double-ended threaded screw 11; 821. Fixed rod 12; 822. Cam 13; Drive component 14; 831. Drive motor 15; 832. Driving pulley 16; 833. Driven pulley 17; 834. Transmission belt 18. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.

[0026] This application discloses a sand screening device with crushing function.

[0027] Example 1: A sand screening device with crushing function, as described in the reference Figure 1 The system includes a housing 1, a multi-stage crushing module 2 and an anti-clogging vibrating screening module 3 disposed within the housing 1. The multi-stage crushing module 2 and the anti-clogging vibrating screening module 3 work together to achieve multi-stage crushing and anti-clogging screening of sand and gravel, thereby improving sand screening efficiency, enhancing anti-clogging capabilities, and optimizing energy consumption.

[0028] Reference Figure 2 , Figure 3 The multi-stage crushing module 2 includes a primary crushing unit 4 and a secondary crushing unit 5. The primary crushing unit 4 includes an upper sawtooth group 6, a lower sawtooth group 7, and a first drive assembly 8. The upper and lower sawtooth groups 6 and 7 are staggered at the top of the sand screening shell 1. The saw teeth of the upper and lower sawtooth groups 6 and 7 are typically made of high-strength alloy steel, a material with high hardness and good wear resistance, capable of withstanding the impact and friction of sand and gravel. Their sharp triangular shape facilitates shearing action on the sand and gravel. The upper and lower sawtooth groups 6 and 7 can be integrally formed using a casting process to ensure the strength and stability of the saw teeth.

[0029] The first driving component 8 is used to drive the upper sawtooth group 6 and the lower sawtooth group 7 to move towards or away from each other. Specifically, the first driving component 8 includes two connecting blocks 81 respectively connected to the upper sawtooth group 6 and the lower sawtooth group 7, a bidirectional threaded screw 82 threaded through the two connecting blocks 81, and a driving component 83 for driving the bidirectional threaded screw 82 to rotate. The connecting blocks 81 are slidably connected to the housing 1. The inner sidewall of the housing 1 is provided with a mounting block 11 for the bidirectional threaded screw 82 to rotate through, and the upper end of the bidirectional threaded screw 82 rotates through the upper end of the housing 1. In this embodiment, at least two bidirectional threaded screws 82 are provided, and they are respectively provided on both sides of the upper sawtooth group 6.

[0030] The driving component 83 specifically includes a drive motor 831, a drive pulley 832 connected to the output shaft of the drive motor 831, a driven pulley 833 rotatably connected to the housing 1, and a transmission belt 834 wound around the drive pulley 832 and the driven pulley 833. One drive pulley 832 and one driven pulley 833 are each provided and fixedly connected to two bidirectional threaded screws 82. The transmission belt 834 can be a V-belt or a synchronous belt; synchronous belts offer high transmission accuracy. Starting the drive motor 831 sequentially drives the drive pulley 832, the transmission belt 834, the driven pulley 833, and the two bidirectional threaded screws 82 to rotate, thereby causing the connecting block 81 to move along the height direction, causing the upper sawtooth group 6 and the lower sawtooth group 7 to move towards or away from each other.

[0031] The secondary crushing unit 5 includes a pair of crushing rollers 51 disposed below the lower sawtooth assembly 7 and a second drive assembly 52 that drives the crushing rollers 51 to rotate in opposite directions. The surface of the crushing rollers 51 is provided with crushing teeth 511, which are spirally distributed along the length of the crushing rollers 51. The crushing rollers 51 are generally made of alloy cast steel, possessing high strength and wear resistance. The crushing teeth 511 on their surface can be welded to the roller body surface using a welding process to ensure the firmness of the crushing teeth 511. The shape of the crushing teeth 511 can be trapezoidal or triangular; different shapes of crushing teeth 511 are suitable for different types of sand and gravel.

[0032] The second drive assembly 52 includes a first bevel gear 521 coaxially connected to the drive pulley 832, a second bevel gear 522 meshing with the first bevel gear 521, a first sprocket 523 connected to the second bevel gear 522, a second sprocket 524 rotatably connected to the side wall of the housing 1, and a chain 525 wound around the first sprocket 523 and the second sprocket 524. The outer side wall of the housing 1 is provided with a mounting plate 12 for rotatably connecting the second bevel gear 522. The second bevel gear 522 is connected to an output shaft, which passes through the mounting plate 12 and is fixedly connected to the first sprocket 523, so that the first sprocket 523 is rotatably connected to the mounting plate 12. The second sprocket 524 is rotatably connected to the side wall of the housing 1, and the first sprocket 523 and the second sprocket 524 are connected by the chain 525.

[0033] Reference Figure 3 , Figure 4 The two crushing rollers 51 rotate toward each other. Specifically, each end of the crushing roller 51 is connected to a rotating shaft 512. Both rotating shafts 512 of one crushing roller 51 are rotatably inserted through the housing 1. One rotating shaft 512 is coaxially fixed with the second sprocket 524, and the other rotating shaft 512 is fixedly connected to the first gear 513. One rotating shaft 512 of the other crushing roller 51 is rotatably inserted through the housing 1 and fixedly connected to the second gear 514 that meshes with the first gear 513. This can drive the two crushing rollers 51 to rotate toward each other, thereby crushing sand and gravel.

[0034] The anti-clogging vibrating screening module 3 includes a first screen plate 31 between the lower sawtooth group 7 and the crushing roller 51, a second screen plate 32 disposed below the crushing roller 51, and a vibration assembly 33 for driving the second screen plate 32 to vibrate. The aperture of the second screen plate 32 is smaller than that of the first screen plate 31. The first screen plate 31 and the second screen plate 32 are usually made of stainless steel, a material that is corrosion-resistant and has high strength.

[0035] The upper surface of the first sieve plate 31 is provided with a top rod 311. The upper end of the top rod 311 is connected to the upper sawtooth group 6 / lower sawtooth group 7. The connection method can be bolt connection, which is convenient for disassembly and maintenance. Under the drive of the top rod 311, the first sieve plate 31 vibrates synchronously during the lifting and lowering process, which accelerates the passage of qualified sand particles through the sieve holes.

[0036] The vibration assembly 33 includes a telescopic rod 331 and a spring 332. The lower ends of the telescopic rod 331 and the spring 332 are connected to the inner bottom wall of the housing 1, and the upper end of the telescopic rod 331 is hinged to the second screen plate 32. The telescopic rod 331 specifically includes a sleeve and a sliding rod slidably connected to the sleeve. The spring 332 is sleeved on the outside of the telescopic rod 331 to form an elastic buffer structure. The spring 332 can be a helical spring 332. The lower end of the bidirectional threaded screw 82 is fixedly connected to a fixing rod 821. A cam 822 is coaxially sleeved on the outside of the fixing rod 821. The side wall of the second screen plate 32 is provided with an abutment plate 321 that abuts against the cam 822. When the bidirectional threaded screw 82 rotates, the cam 822 rotates accordingly, pushing the abutment plate 321, causing the second screen plate 32 to vibrate up and down. The impact force of falling sand and gravel triggers the up and down vibration of the second screen plate, preventing the screen holes from clogging.

[0037] Back Figure 1 A discharge pipe 14 is installed through the side wall of the shell 1. A guide plate 15 is installed below the second screen plate 32. The end of the guide plate 15 near the discharge pipe 14 is inclined downwards, and the guide plate 15 is wavy. Its wavy surface design and the angle of inclination form an angle with the vibration direction of the second screen plate, so that the sand and gravel will generate a spiral motion along the surface of the guide plate 15 during the vibrating screening process, which will extend the screening path and improve the screening effect.

[0038] The implementation principle of the sand screening equipment with crushing function in this application embodiment is as follows: The sand screening equipment performs primary and secondary crushing of sand and gravel through a multi-stage crushing module 2, thereby improving crushing efficiency. The anti-clogging vibrating screening module 3 utilizes the vibration of the screen plate and the special design of the guide plate 15 to prevent screen hole clogging, extend the screening path, and improve sand screening efficiency. At the same time, the power distribution system enables a single power source to drive multiple stages of action, optimizing energy consumption. Moreover, the equipment has a relatively simple structure, and each component is easy to disassemble and maintain, improving maintenance convenience. Compared with existing sand screening equipment, it has significant improvements and enhancements.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sand screening device with crushing function, characterized in that: The system includes a housing (1), a multi-stage crushing module (2) disposed within the housing (1), and an anti-clogging vibrating screening module (3). The multi-stage crushing module (2) includes a primary crushing unit (4) and a secondary crushing unit (5). The primary crushing unit (4) includes an upper sawtooth group (6) and a lower sawtooth group (7) disposed at the top of the sand shell and arranged in an alternating manner, as well as a first driving component (8) that drives the upper sawtooth group (6) and the lower sawtooth group (7) to move toward each other or away from each other. The secondary crushing unit (5) includes a lower sawtooth group... The crushing rollers (51) below the group (7) and the second drive assembly (52) that drives the crushing rollers (51) to rotate in the opposite direction are provided with crushing teeth (511) on the surface of the crushing rollers (51); the anti-clogging vibrating screening module (3) includes a first screen plate (31) between the lower sawtooth group (7) and the crushing rollers (51), a second screen plate (32) provided below the crushing rollers (51) and a vibration assembly (33) for driving the second screen plate (32) to vibrate, wherein the aperture of the second screen plate (32) is smaller than the aperture of the first screen plate (31).

2. A sand screening device with crushing function according to claim 1, characterized in that: The crushing teeth (511) are spirally distributed around the crushing roller (51) along its length.

3. A sand screening device with crushing function according to claim 1, characterized in that: The first drive assembly (8) includes a connecting block (81) connected to the upper sawtooth group (6) and the lower sawtooth group (7), a bidirectional threaded screw (82) threaded through the two connecting blocks (81), and a drive member (83) for driving the bidirectional threaded screw (82) to rotate. The connecting block (81) is slidably connected to the housing (1).

4. A sand screening device with crushing function according to claim 3, characterized in that: The drive component (83) includes a drive motor (831), a drive pulley (832) connected to the output shaft of the drive motor (831), a driven pulley (833) rotatably connected to the housing (1), and a transmission belt (834) wound around the drive pulley (832) and the driven pulley (833). Two bidirectional threaded screws (82) are provided and are respectively connected to the drive pulley (832) and the driven pulley (833). The second drive assembly (52) includes a first bevel gear (521) coaxially connected to the drive pulley (832), a second bevel gear (522) meshing with the first bevel gear (521), a first sprocket (523) connected to the second bevel gear (522), a second sprocket (524) rotatably connected to the side wall of the housing (1), and a chain (525) wound around the first sprocket (523) and the second sprocket (524).

5. A sand screening device with crushing function according to claim 3, characterized in that: The upper surface of the first sieve plate (31) is provided with a top rod (311), and the upper end of the top rod (311) is connected to the upper serrated group (6) / lower serrated group (7).

6. A sand screening device with crushing function according to claim 3, characterized in that: The vibration assembly (33) includes a telescopic rod (331) connected to the lower surface of the second sieve plate (32) and a spring (332) coaxially sleeved outside the telescopic rod (331). The lower ends of the telescopic rod (331) and the spring (332) are connected to the inner bottom wall of the housing (1).

7. A sand screening device with crushing function according to claim 6, characterized in that: The lower end of the bidirectional threaded screw (82) extends to the bottom of the housing (1). The bidirectional threaded screw (82) is coaxially fitted with a cam (822). The side wall of the second screen plate (32) is provided with an abutment plate (321) that abuts against the cam (822). The upper end of the telescopic rod (331) is hinged to the second screen plate (32).

8. A sand screening device with crushing function according to claim 1, characterized in that: The side wall of the housing (1) is provided with a discharge pipe (14), and a guide plate (15) is provided below the second screen plate (32). The end of the guide plate (15) near the discharge pipe (14) is inclined downward and the guide plate (15) is wavy.

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