Dust-free crushing device for gravel waste
By combining the screening and vibration control of the guide net and crushing roller with the dust removal device, the problem of uneven particle size of sand and gravel waste in the existing technology has been solved, achieving particle size uniformity and dust control, and improving the quality of sand and gravel waste recycling and product performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-04-14
AI Technical Summary
In existing technologies, the forces acting on materials within the crushing chamber are complex, resulting in uneven particle size distribution of the final product. This affects the quality of sand and gravel waste recycling, and may lead to unstable product performance, especially in the production of building materials.
The material is initially screened by a guide net, and then continuously crushed by the combination of crushing roller, receiving plate and screen. The movement of the receiving plate is controlled by vibration to enhance the sealing performance. At the same time, the dust removal device is used to remove dust to ensure uniform particle size and working stability.
It effectively improves the particle size distribution of materials, ensures particle size uniformity, improves the quality of sand and gravel waste recycling, reduces dust pollution, and enhances the performance stability of products.
Smart Images
Figure CN224114053U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dust-free crushing technology for sand and gravel waste, specifically a dust-free crushing device for sand and gravel waste. Background Technology
[0002] With the increasing global emphasis on environmental protection, large users of sand and gravel, such as the construction industry, have an increasingly urgent need for dust-free treatment and recycling of sand and gravel waste. This dust-free crushing device can effectively solve the dust pollution problem in the process of sand and gravel waste treatment and has broad application prospects in the market.
[0003] Existing technology uses a jaw crusher, which consists of a crushing chamber formed by two jaw plates, a moving jaw and a stationary jaw. It simulates the jaw movements of an animal to crush materials. During operation, the motor drives the belt and pulley, which in turn causes the moving jaw to move up and down via an eccentric shaft. When the moving jaw rises, the angle between the toggle plate and the moving jaw increases, thus pushing the moving jaw plate closer to the stationary jaw plate. The material is crushed by multiple actions such as squeezing, rubbing, and grinding. When the moving jaw descends, the angle decreases, and the moving jaw plate moves away from the stationary jaw plate under the action of the pull rod and spring. The crushed material is discharged under gravity, thus achieving the crushing of sand and gravel waste.
[0004] Due to the complex stress conditions of materials within the crushing chamber, the crushing force and duration vary at different locations, resulting in a wide particle size distribution in the final product and making it difficult to ensure uniform particle size. While traditional crushers can improve particle shape to some extent, they may still cause uneven particle size for some special shapes or properties of sand and gravel waste, affecting the quality of subsequent sand and gravel waste recycling. For example, when used in the production of building materials, it may lead to unstable product performance. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a dust-free crushing device for sand and gravel waste. It solves the problem that existing technologies suffer from complex stress conditions on materials within the crushing chamber, with varying crushing forces and durations at different locations, resulting in a wide particle size distribution in the final product and difficulty in ensuring uniform particle size. While traditional crushers can improve particle shape to some extent, they may still cause uneven particle size for some sand and gravel waste with special shapes or properties, affecting the quality of subsequent reuse of sand and gravel waste. For example, when used in building material production, it may lead to unstable product performance.
[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a dust-free crushing device for sand and gravel waste, including a box body, a feed inlet on one side of the top of the box body, a crushing roller installed on the inner wall of the box body, and a screening device installed inside the box body; a dust removal device installed outside the box body; wherein, the screening device crushes and screens the material multiple times, and the dust removal device adsorbs the dust inside the box body.
[0007] Preferably, the screening device includes a guide net fixedly connected to the top of the inner wall of the housing; a receiving tray disposed at the bottom of the crushing roller; a screen embedded in the bottom of the receiving tray; two mounting bases, respectively fixedly connected to both sides of the inner wall of the housing; a vertical rod penetrating the interior of the mounting base and fixedly connected to the bottom of the receiving tray; an elastic element sleeved on the outer wall of the vertical rod, with one end fixedly connected to the bottom of the receiving tray and the other end fixedly connected to the surface of the mounting base; a first soft sleeve fixedly connected to the surface of the mounting base, with its top fixedly connected to the bottom of the receiving tray; and a second soft sleeve fixedly connected to the bottom of the mounting base and fixedly connected to the outer wall of the vertical rod. The guide net performs preliminary screening of the material, the crushing roller continuously crushes the material through the cooperation of the receiving tray and the screen, the receiving tray squeezes the elastic element due to gravity, causing the vertical rod to move vertically and swaying the receiving tray, and the first and second soft sleeves on the mounting base provide a sealing function.
[0008] Preferably, the dust removal device includes a dustproof soft curtain embedded inside the feed inlet; an annular duct fixedly connected to the inner wall of the housing and located above the crushing roller; a dust collection box fixedly connected to one side of the outer wall of the housing, with the top of the inner wall connected to the end of the annular duct; a filter screen inserted into the interior of the dust collection box; and a fan connected to the outer wall of the dust collection box. When material falls into the housing, the dust inside the housing is removed through the cooperation of the dustproof soft curtain, the annular duct, the dust collection box, the filter screen, and the fan.
[0009] Preferably, an umbrella-shaped plate is fixedly connected to the bottom of the guide net, and sealing plugs are inserted into the upper sides of both sides of the outer wall of the box, with the sealing plugs positioned above the umbrella-shaped plate.
[0010] Preferably, the outer wall of the crushing roller is provided with a crushing cover, two crushing rollers are provided, and they are respectively arranged inside the crushing cover at the front and back. The outer wall of the crushing cover is fixedly connected to the inner wall of the box. Connecting rods are fixedly connected to both sides of the crushing roller. The connecting rods pass through the crushing cover through sealed bearings. The ends of the connecting rods are rotatably connected to the box through bearings. One end passes through the side wall of the box and is fixedly connected to a drive motor. The other end is fixedly connected to a drive motor. The drive motor is fixedly connected to the outer wall of the box.
[0011] Preferably, a discharge wheel is rotatably connected to the bottom of the inner wall of the box, and elastic dustproof baffles are attached to both sides of the bottom of the discharge wheel. The elastic dustproof baffles are fixedly connected to the inner wall of the box, and a plug rod is inserted into the lower side wall of the box.
[0012] Beneficial effects
[0013] This utility model provides a dust-free crushing device for sand and gravel waste. It offers the following advantages: This dust-free crushing device uses a guide screen to initially screen smaller particles, ensuring uniform material distribution. Combined with the cooperation of the crushing roller, receiving disc, and screen, it continuously crushes the material. Vibration is used to slide the receiving disc along the vertical rod and compress the elastic element inside the mounting base for vibration control. Simultaneously, the first soft sleeve on the surface of the mounting base and the second soft sleeve at the bottom enhance the sealing performance, effectively preventing material leakage and dust dispersion, thereby improving overall operational stability. This device effectively improves the particle size distribution of materials, ensuring uniform particle size. It is particularly suitable for crushing sand and gravel waste, guaranteeing particle size uniformity and improving the quality of sand and gravel waste recycling. When used in building material production, it can effectively improve the stability of product performance.
[0014] As the material enters the chamber through the inlet, the dustproof curtain first blocks external dust. Then, the dust generated when the material falls is guided into the dust collector through the annular duct. The annular duct is fixed to the inner wall of the chamber and located above the crushing roller to ensure sufficient dust adsorption. The dust collector is located next to the outer wall of the chamber, and the filter screen is installed inside it, which can effectively filter out fine dust and particulate matter in the air. Then, the fan starts and exhausts the air purified by the filter screen, while the dust trapped by the filter screen remains in the dust collector, thus achieving efficient dust removal inside the chamber and effectively reducing dust pollution to the external environment. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the appearance of the present utility model;
[0017] Figure 3 for Figure 1 A schematic diagram of the structure of the crushing roller, dust removal device, and crushing hood;
[0018] Figure 4 for Figure 1 Schematic diagram of the intermediate receiving tray, mounting base and vertical rod;
[0019] Figure 5 for Figure 1 A schematic diagram of the structure of the feed inlet, the guide mesh, and the dustproof soft curtain.
[0020] In the diagram: 1. Box body; 2. Feed inlet; 3. Crushing roller; 4. Screening device; 41. Guide net; 42. Receiving tray; 43. Screen; 44. Mounting base; 45. Vertical rod; 46. Elastic element; 47. First soft sleeve; 48. Second soft sleeve; 5. Dust removal device; 51. Dustproof soft curtain; 52. Annular air duct; 53. Dust removal box; 54. Filter screen; 55. Fan; 6. Drive motor; 7. Umbrella-shaped plate; 8. Crushing cover; 9. Insert rod; 10. Sealing plug; 11. Discharge wheel; 12. Connecting rod; 13. Elastic dustproof baffle. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Due to the complex stress conditions of materials within the crushing chamber, the crushing force and duration vary at different locations, resulting in a wide particle size distribution in the final product and making it difficult to ensure uniform particle size. While traditional crushers can improve particle shape to some extent, they may still cause uneven particle size for some special shapes or properties of sand and gravel waste, affecting the quality of subsequent sand and gravel waste recycling. For example, when used in the production of building materials, it may lead to unstable product performance.
[0023] In view of this, the present invention provides a dust-free crushing device for sand and gravel waste. This device uses a guide screen to initially screen smaller particles of material, ensuring uniform material distribution. Then, combined with the cooperation of the crushing roller, receiving disc, and screen, it continuously crushes the material. Vibration is used to slide the receiving disc along the vertical rod and compress the elastic element inside the mounting base for vibration control. Simultaneously, the first soft sleeve on the surface of the mounting base and the second soft sleeve at the bottom enhance the sealing performance, effectively preventing dust escape and thus improving the overall working stability. This device can effectively improve the particle size distribution of materials, ensuring uniform particle size, and is particularly suitable for crushing sand and gravel waste, guaranteeing particle size uniformity and improving the quality of sand and gravel waste recycling. When used in building material production, it can effectively improve the stability of product performance.
[0024] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process.
[0025] Example 1: By Figure 1-5It is known that a dust-free crushing device for sand and gravel waste includes a box body 1, characterized in that: a feed inlet 2 is provided on one side of the top of the box body 1, and a crushing roller 3 is installed on the inner wall of the box body 1. The dust-free crushing device for sand and gravel waste also includes a screening device 4 and a dust removal device 5. The screening device 4 is installed inside the box body 1; the dust removal device 5 is installed outside the box body 1. The screening device 4 crushes and screens the material multiple times, and the dust removal device 5 adsorbs the dust inside the box body 1.
[0026] In the specific implementation process, it is worth noting that the screening device 4 crushes and screens the material multiple times, and the dust removal device 5 adsorbs the dust inside the box 1.
[0027] Furthermore, the screening device 4 includes a guide net 41, a receiving tray 42, a screen 43, a mounting base 44, a vertical rod 45, an elastic element 46, a first soft sleeve 47, and a second soft sleeve 48. The guide net 41 is fixedly connected to the top of the inner wall of the housing 1; the receiving tray 42 is disposed at the bottom of the crushing roller 3; the screen 43 is embedded in the bottom of the receiving tray 42; two mounting bases 44 are provided, respectively fixedly connected to both sides of the inner wall of the housing 1; the vertical rod 45 passes through the interior of the mounting base 44 and is fixedly connected to the bottom of the receiving tray 42; the elastic element 46 is sleeved on the outer wall of the vertical rod 45, with one end fixedly connected to the bottom of the receiving tray 42 and the other end fixedly connected to the surface of the mounting base 44; the first soft sleeve 47 is fixedly connected to the surface of the mounting base 44, and its top end is fixedly connected to the outer wall of the vertical rod 45. The bottom of the receiving tray 42 is fixedly connected; the second soft sleeve 48 is fixedly connected to the bottom of the mounting base 44 and is fixedly connected to the outer wall of the vertical rod 45; wherein, the guide net 41 performs preliminary screening of the material, the crushing roller 3 continuously crushes the material through the cooperation of the receiving tray 42 and the screen 43, the receiving tray 42 squeezes the elastic element 46 due to gravity, and drives the vertical rod 45 to move vertically, and can shake the receiving tray 42. The first soft sleeve 47 and the second soft sleeve 48 on the mounting base 44 play a sealing role. The elastic element 46 drives the receiving tray 42 to shake up and down, which helps to screen the material. The first soft sleeve 47 and the second soft sleeve 48 are made of rubber and other materials with good flexibility and sealing performance: to ensure good sealing performance and durability;
[0028] In the specific implementation process, it is worth noting that the material with smaller particles is initially screened by the guide net 41. At this time, the material is evenly distributed above the receiving plate 42. Then, the crushing roller 3 continuously crushes the material through the cooperation of the receiving plate 42 and the screen 43. The vibration generated during the crushing process causes the receiving plate 42 to slide down along the vertical rod 45 under the action of gravity and squeeze the elastic element 46 inside the mounting base 44, thereby realizing the vibration control of the receiving plate 42 and driving the receiving plate 42 to vibrate. The first soft sleeve 47 on the surface of the mounting base 44 and the second soft sleeve 48 at the bottom ensure the seal between the receiving plate 42 and the mounting base 44 and between the bottom of the mounting base 44 and the vertical rod 45, preventing dust from entering its interior, thereby improving the overall sealing performance and working stability.
[0029] Furthermore, the dust removal device 5 includes a dustproof soft curtain 51, an annular duct 52, a dust collection box 53, a filter screen 54, and a fan 55. The dustproof soft curtain 51 is embedded inside the feed inlet 2; the annular duct 52 is fixedly connected to the inner wall of the box 1 and is located above the crushing roller 3; the dust collection box 53 is fixedly connected to one side of the outer wall of the box 1, and the top of the inner wall is connected to the end of the annular duct 52; the filter screen 54 is inserted into the interior of the dust collection box 53; and the fan 55 is connected to the outer wall of the dust collection box 53. When material falls into the box 1, the dustproof soft curtain 51, the annular duct 52, the dust collection box 53, the filter screen 54, and the fan 55 work together to remove dust from the inside of the box 1. When material enters the box 1 from the feed inlet 2, the dustproof soft curtain 51 reduces the amount of dust that overflows when the material enters. The dustproof soft curtain 51 initially blocks the dust from spreading to the external environment, thus controlling the spread of dust to a certain extent. The dustproof soft curtain 51, resembling a curtain in appearance, serves to block dust. The annular air duct 52 can be cleaned regularly by staff after use. The dustproof soft curtain 51 has a certain degree of flexibility and wear resistance and can be made of rubber. The dustproof soft curtain 51 can be set to an inclined type, with the curtain installed at a certain angle. The material slides down from above the curtain and is made of multiple layers of materials to increase the dustproof effect. Dust generated during the crushing process cannot pass through the multi-layered dustproof soft curtain 51, thus achieving the dustproof effect while allowing material to pass through. Alternatively, it can be set in a ring shape, with the outer wall made of rubber material and fixed to the inner wall of the feed inlet 2. The inside is sealed with a brush-like structure, ensuring that the material passes through the feed inlet 2 while blocking the dust generated during the crushing process. The filter screen 54 extends to the outside of the dust collection box 53 on one side, and the staff can replace the filter screen 54 by pulling the handle on the outside of the filter screen 54.
[0030] In the specific implementation process, it is worth noting that during the process of entering the box 1 through the feed inlet 2, the dustproof soft curtain 51 can prevent dust from drifting out. Subsequently, the dust generated when the material falls is guided into the dust collection box 53 through the annular air duct 52. The annular air duct 52 is fixed to the inner wall of the box 1 and located above the crushing roller 3 to ensure sufficient dust adsorption. The dust collection box 53 is close to the outer wall of the box 1, and the filter screen 54 is installed inside it, which can effectively filter out fine dust and particulate matter in the air. The air purified by the filter screen 54 is discharged, while the dust blocked by the filter screen 54 remains in the dust collection box 53, thereby achieving efficient dust removal inside the box 1 and effectively reducing dust pollution to the external environment.
[0031] Specifically, when using this dust-free crushing device for sand and gravel waste, the guide screen 41 screens smaller particles to ensure that materials of the correct size do not enter the crushing hood 8. Materials that do not pass through the guide screen 41 fall into the crushing hood 8 and are then continuously crushed by the cooperation of the crushing roller 3 and the screen 43. The vibration during the crushing process causes the receiving disc 42 to slide along the vertical rod 45 and squeeze the elastic element 46, thereby achieving vibration control and causing the receiving disc 42 to shake slightly up and down. This facilitates the passage of materials of the correct size above the screen 43. In addition, the mounting base... The first soft sleeve 47 on the surface of the 44 and the second soft sleeve 48 at the bottom effectively prevent dust from entering between the vertical rod 45 and the mounting base 44, avoiding obstruction. When the fan 55 is started, the dust generated when the material falls is guided into the dust collection box 53 through the annular air duct 52. The filter screen 54 installed in the dust collection box 53 effectively filters out fine dust and particulate matter in the air. The air purified by the filter screen 54 is discharged, while the dust blocked by the filter screen 54 remains in the dust collection box 53, thereby achieving efficient dust removal inside the box 1 and effectively reducing dust pollution to the external environment.
[0032] Example 2: From Figure 1-4 It can be seen that the bottom of the guide net 41 is fixedly connected to the umbrella-shaped plate 7, and the upper sides of both sides of the outer wall of the box 1 are fitted with sealing plugs 10, which are located above the umbrella-shaped plate 7.
[0033] In the specific implementation process, it is worth noting that the space generated inside the umbrella-shaped plate 7 and the guide net 41 stores the material screened out by the guide net 41, and discharges the material inside by pulling the sealing plug 10.
[0034] Furthermore, the outer wall of the crushing roller 3 is provided with a crushing cover 8. Two crushing rollers 3 are provided, and they are respectively located inside the crushing cover 8 at the front and back. The outer wall of the crushing cover 8 is fixedly connected to the inner wall of the box body 1. Connecting rods 12 are fixedly connected to both sides of the crushing roller 3. The connecting rods 12 pass through the crushing cover 8 through sealed bearings. The ends of the connecting rods 12 are rotatably connected to the box body 1 through bearings, and one end passes through the side wall of the box body 1 and is fixedly connected to the drive motor 6. The drive motor 6 is fixedly connected to the outer wall of the box body 1. The crushing roller 3 crushes the material during rotation. The crushing cover 8 plays a role in protecting and guiding the crushing process. It can prevent the material from splashing into other unnecessary areas of the box body 1 during the crushing process, and at the same time, it helps to concentrate the crushing force and improve the crushing efficiency.
[0035] In the specific implementation process, it is worth noting that the material inside the crushing hood 8 can make good contact with the crushing roller 3, thereby improving the crushing efficiency, and the drive motor 6 provides kinetic energy to the crushing roller 3.
[0036] Furthermore, a discharge wheel 11 is rotatably connected to the bottom of the inner wall of the housing 1. Elastic dustproof baffles 13 are attached to both sides of the bottom of the discharge wheel 11. The elastic dustproof baffles 13 are fixedly connected to the inner wall of the housing 1. A rod 9 is inserted into the lower side wall of the housing 1. The elastic dustproof baffles 13 can be made of natural rubber. Natural rubber has good elasticity and flexibility, allowing it to fit well against both sides of the bottom of the discharge wheel 11. It is also not easily broken during long-term deformation. It has a certain ability to block dust and does not contaminate the material when in contact with it. Considering the shape of the discharge wheel 11 and its rotational operation, an arc-shaped elastic dustproof baffle 13 is more reasonable. This shape can match the outer circumference of the discharge wheel 11, maximizing dust coverage. The gap between the discharge wheel 11 and the inner wall of the box 1 is covered. When the discharge wheel 11 rotates, the arc-shaped dustproof baffle can undergo corresponding elastic deformation with the movement of the discharge wheel 11, always maintaining the sealing effect of the gap. The root of the dustproof baffle (the part fixedly connected to the inner wall of the box 1) can be designed to be relatively thick to provide better connection strength and support, while the part gradually thins from the root to the edge and has a certain curvature. This can ensure the fit with the discharge wheel 11 and generate appropriate elastic deformation when squeezed by the discharge wheel 11. For example, it can be similar to a fan-shaped ring, wide at one end and narrow at the other. The wide end is fixed to the inner wall of the box 1, and the narrow end is close to the central axis of the discharge wheel 11. This shape helps to improve the dustproof effect.
[0037] In the specific implementation process, it is worth noting that the discharge wheel 11 enables the material to be discharged in batches, and the elastic dustproof baffle 13 can block dust when it is generated inside the box 1. When the discharge wheel 11 is rotating at a normal speed and the discharge is small, the screen 43 is manually judged to be blocked. If it is blocked, the equipment is stopped by the staff and the baffle 9 is manually pushed to the bottom of the vertical rod 45. Since the bottom of the baffle 9 and the vertical rod 45 are both designed with a slope, it can save effort when pushing them. When the bottom of the vertical rod 45 is effectively attached to the top of the baffle 9, the baffle 9 prevents the vertical rod 45 from moving downward, ensuring that the receiving tray 42 remains fixed and ensuring that the material on the receiving tray 42 is in full contact with the crushing roller 3, thereby realizing the crushing of materials of different sizes.
[0038] Specifically, based on the above embodiment 1, the space generated inside the umbrella-shaped plate 7 and the guide net 41 can temporarily store the material screened by the guide net 41, and the material is discharged through the sealing plug 10. The material in the crushing hood 8 can make good contact with the crushing roller 3, improving the crushing efficiency. The drive motor 6 provides power to the crushing roller 3 and drives another crushing roller 3 to rotate synchronously through its external gear, effectively enhancing the crushing efficiency. The discharge wheel 11 causes the material to be discharged in batches, reducing dust in the discharge process. The elastic dustproof baffle 13 effectively reduces the leakage of dust inside the box 1 during discharge. When the staff observes that the rotation speed of the discharge wheel 11 is normal and the discharge amount is not large, they can pull the insertion rod 9 to judge whether the screen 43 is blocked. If the screen 43 is blocked, the insertion rod 9 can be manually pushed to the bottom of the vertical rod 45 to ensure that the receiving plate 42 is fixed, so that the material can continue to make full contact with the crushing roller 3, thereby achieving uniform crushing of materials of different sizes.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A dust-free crushing device for sand and gravel waste, comprising a housing (1), characterized in that: The top side of the box (1) is provided with a feed inlet (2), and the inner wall of the box (1) is equipped with a crushing roller (3). The dust-free crushing device for sand and gravel waste also includes: Screening device (4) is installed inside the housing (1); A dust removal device (5) is installed on the outside of the housing (1); The screening device (4) crushes and screens the material multiple times, and the dust removal device (5) adsorbs the dust inside the box (1).
2. The dust-free crushing device for sand and gravel waste according to claim 1, characterized in that: The screening device (4) includes: The material guide net (41) is fixedly connected to the top of the inner wall of the box (1); The receiving tray (42) is located at the bottom of the crushing roller (3); A screen (43) is embedded in the bottom of the receiving tray (42); Mounting base (44), two of them are provided and fixedly connected to the inner walls of the box (1) on both sides respectively; Two vertical rods (45) are provided, which pass through the interior of the mounting base (44) and are fixedly connected to the bottom of the receiving tray (42); The elastic element (46) is sleeved on the outer wall of the vertical rod (45), and one end is fixedly connected to the bottom of the receiving tray (42), and the other end is fixedly connected to the surface of the mounting base (44). The first soft sleeve (47) is fixedly connected to the surface of the mounting base (44), and its top is fixedly connected to the bottom of the receiving tray (42); The second soft sleeve (48) is fixedly connected to the bottom of the mounting base (44) and is fixedly connected to the outer wall of the vertical rod (45); The material guide net (41) performs preliminary screening of the material, the crushing roller (3) continuously crushes the material through the cooperation of the receiving plate (42) and the screen (43), the receiving plate (42) squeezes the elastic element (46) due to gravity, and drives the vertical rod (45) to move vertically, and can shake the receiving plate (42). The first soft sleeve (47) and the second soft sleeve (48) on the mounting base (44) play a sealing role.
3. The dust-free crushing device for sand and gravel waste according to claim 1, characterized in that: The dust removal device (5) includes: A dustproof soft curtain (51) is embedded inside the feed inlet (2); The annular air duct (52) is fixedly connected to the inner wall of the box (1) and is located above the crushing roller (3); The dust collector (53) is fixedly connected to one side of the outer wall of the box (1), and the top of the inner wall is connected to the end of the annular air duct (52); The filter screen (54) is inserted into the interior of the dust collection box (53); The fan (55) is connected to the outer wall of the dust collection box (53); When materials fall into the box (1), the dust inside the box (1) is removed by the cooperation of the dustproof soft curtain (51), the annular air duct (52), the dust removal box (53), the filter screen (54) and the fan (55).
4. The dust-free crushing device for sand and gravel waste according to claim 2, characterized in that: The bottom of the guide net (41) is fixedly connected to an umbrella-shaped plate (7), and sealing plugs (10) are inserted into the upper sides of both sides of the outer wall of the box (1). The sealing plugs (10) are located above the umbrella-shaped plate (7).
5. The dust-free crushing device for sand and gravel waste according to claim 1, characterized in that: The outer wall of the crushing roller (3) is provided with a crushing cover (8). Two crushing rollers (3) are provided and are respectively located inside the crushing cover (8) at the front and back. The outer wall of the crushing cover (8) is fixedly connected to the inner wall of the box (1). Connecting rods (12) are fixedly connected to both sides of the crushing roller (3). The connecting rods (12) pass through the crushing cover (8) through a sealed bearing. The end of the connecting rod (12) is rotatably connected to the box (1) through a bearing. One end passes through the side wall of the box (1) and is fixedly connected to a drive motor (6). The drive motor (6) is fixedly connected to the outer wall of the box (1).
6. The dust-free crushing device for sand and gravel waste according to claim 1, characterized in that: The bottom of the inner wall of the box (1) is rotatably connected to a discharge wheel (11). Both sides of the bottom of the discharge wheel (11) are fitted with elastic dustproof baffles (13). The elastic dustproof baffles (13) are fixedly connected to the inner wall of the box (1). A plug rod (9) is inserted into the lower side wall of the box (1).