Dust removal type sand and gravel grading and screening device

Abstract

The utility model discloses a dust removal type sandstone grading screening device belongs to sandstone grading equipment field, including the fixed frame, be equipped with screening mechanism and dust removal mechanism on the fixed frame, the screening mechanism includes frame assembly and screening subassembly, the frame assembly includes the dust baffle frame of being equipped with on the fixed frame, screening subassembly is located in the dust baffle frame, screening subassembly includes two sets of fixed ring stand and screening cylinder, two sets of fixed ring stand all are equipped with annular groove, be equipped with the screen hole of different caliber on screening cylinder, cooperate the inclination arrangement of fixed frame and screening mechanism, can complete the grading screening of different specifications sandstone in one time in the screening cylinder rotation process, has solved the problem that traditional cylinder screen fixed aperture design can not realize multistage screening in one time, simultaneously, and drive assembly is engaged with the gear ring cylinder of screening cylinder two ends through transmission gear, provides stable power for screening cylinder, ensures that screening process is continuous and efficient.

Description

Technical Field

[0001] This utility model belongs to the field of sand and gravel grading equipment, specifically relating to a dust removal type sand and gravel grading and screening device. Background Technology

[0002] In fields such as construction, road construction, and mining, sand and gravel are basic raw materials, and the accuracy of their particle size distribution directly affects the quality of the project. Therefore, the grading and screening of sand and gravel is a key process in the raw material processing stage. Currently, most sand and gravel grading and screening devices on the market adopt vibrating screens or drum screens.

[0003] Traditional drum screens achieve sand and gravel grading through the rotation of the drum, and their screening efficiency is relatively stable. However, traditional drum screens still have certain drawbacks. The screening drums of traditional drum screens are mostly designed with fixed apertures. If it is necessary to screen sand and gravel of different specifications, multi-stage screening cannot be achieved at one time, which makes the work efficiency low. In addition, during the screening process, the collision and friction between sand and gravel will generate a lot of dust. This dust not only pollutes the working environment, but also poses a threat to the health of operators. Utility Model Content

[0004] The purpose of this invention is to provide a dust removal type sand and gravel grading and screening device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dust removal type sand and gravel grading and screening device, including a fixed frame, on which a screening mechanism and a dust removal mechanism are provided, wherein the screening mechanism is used to screen sand and gravel; The screening mechanism includes a frame assembly and a screening assembly. The frame assembly includes a dust-proof frame mounted on a fixed frame, and the screening assembly is mounted within the dust-proof frame. The screening assembly includes two sets of fixed ring frames and a screening cylinder. Both sets of fixed ring frames are provided with annular grooves. The screening cylinder has an integral structure at both ends and is provided with toothed ring cylinders. The screening cylinder is installed in the fixed ring frames on both sides through the toothed ring cylinders at both ends. One set of fixed ring frames is provided with a feed inlet. The sieving cylinder is equipped with sieve holes of different diameters.

[0006] In a preferred embodiment, the fixed frame is further provided with a drive assembly, which consists of a movable shaft, transmission gears and a drive motor. The movable shaft is mounted on two sets of support seats on the fixed frame. The transmission gears are fixed on the movable shaft and mesh with the gear ring cylinder. The drive motor is mounted on one set of support seats and its output shaft is connected to the movable shaft.

[0007] In a preferred embodiment, the fixed frame, dustproof frame and two sets of fixed ring frames are combined to form a sealed space. Positioning plates are welded to both sides of the two sets of fixed ring frames and are installed on the fixed frame through the positioning plates.

[0008] In a preferred embodiment, the bottom of the dustproof frame is provided with two discharge ports, which correspond to two different sizes of screen holes on the screening cylinder. Directly below each of the two discharge ports, there is a collection trough.

[0009] In a preferred embodiment, the fixing frame and the screening mechanism are arranged at an angle.

[0010] In a preferred embodiment, the dust removal mechanism includes a vacuum cleaner with a built-in vacuum pump. The output end of the vacuum pump is connected to a vacuum pipe, and the vacuum pipe is connected to a vacuum hood, which is located on the side wall of the dust-blocking frame.

[0011] In one preferred embodiment, a set of the fixed ring frame sidewalls is provided with a screening control component, the screening control component including an electric drive push rod and a baffle ring, the baffle ring being disposed in the screening cylinder, the size of the baffle ring being adapted to the inner diameter of the screening cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This dust-removing sand and gravel grading and screening device, with screen holes of different diameters on the screening cylinder and the inclined arrangement of the fixed frame and screening mechanism, can complete the grading and screening of sand and gravel of different specifications in one go during the rotation of the screening cylinder. It solves the problem that the fixed aperture design of the traditional drum screen cannot achieve multi-stage screening at one time. At the same time, the drive component provides stable power to the screening cylinder through the meshing of the transmission teeth with the toothed ring cylinders at both ends of the screening cylinder, ensuring that the screening process is continuous and efficient. This dust-removing sand and gravel grading and screening device forms a closed space through the combination of a fixed frame, a dust baffle frame, and two sets of fixed ring frames, which can effectively prevent dust from leaking out during the screening process. The dust removal mechanism's dust suction hood is located on the side wall of the dust baffle frame, which can capture the dust in the closed space, and then suck the dust away through a dust pump and a dust suction pipe, solving the problems of unreasonable dust hood position and poor dust removal effect in traditional devices.

[0013] This dust-removing sand and gravel grading and screening device uses a baffle ring in the screening control component that is matched with the inner diameter of the screening cylinder. Through the interval action of the baffle ring, the sand and gravel can be fully rotated and screened in a screening cylinder of a certain size. After screening for a certain period of time, the baffle ring is moved backward by the electric drive push rod, allowing the remaining sand and gravel to smoothly reach the position of the second size screening cylinder for the next step of screening. This step-by-step screening method avoids mutual interference between sand and gravel of different specifications during the screening process, and significantly improves the accuracy of grading and screening. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the screening component and the driving component of this utility model. Figure 3 This is a schematic diagram of the installation structure of the screening cylinder of this utility model; Figure 4 This is a schematic diagram of the sieving control component structure of this utility model.

[0015] In the diagram: 1. Fixed frame; 2. Dust baffle frame; 21. Discharge port; 22. Collection trough; 3. Screening assembly; 31. Fixed ring frame; 311. Annular groove; 312. Feed inlet; 313. Positioning plate; 32. Toothed ring cylinder; 33. Screening cylinder; 4. Movable shaft; 41. Transmission gear; 42. Drive motor; 5. Vacuum cleaner; 51. Suction pipe; 52. Suction hood; 6. Screening control assembly; 61. Electric drive push rod; 62. Material retaining ring. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments.

[0017] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0018] Please see Figures 1-4 This utility model provides a dust-removing sand and gravel grading and screening device, including a fixed frame 1. The fixed frame 1 is equipped with a screening mechanism and a dust removal mechanism. The screening mechanism includes a frame assembly and a screening component 3. The frame assembly includes a dust-blocking frame 2 mounted on the fixed frame 1. The screening component 3 is disposed in the dust-blocking frame 2. The screening component 3 includes two sets of fixed ring frames 31 and a screening cylinder 33. Both sets of fixed ring frames 31 are provided with annular grooves 311. The two ends of the screening cylinder 33 are integral structures and are provided with toothed ring cylinders 32. The screening cylinder 33 is installed in the fixed ring frames 31 on both sides through the toothed ring cylinders 32 at both ends. The fixed ring frame 31 is provided with a feed inlet 312, and the screening cylinder 33 is provided with screen holes of different diameters. The fixed frame 1 and the screening mechanism are arranged in an inclined manner. Furthermore, the fixed frame 1, the dust baffle frame 2 and the two fixed ring frames 31 are combined with each other to form a closed space. Positioning plates 313 are welded on both sides of the two fixed ring frames 31 and are installed on the fixed frame 1 through the positioning plates 313. The dust removal mechanism includes a vacuum cleaner 5. The vacuum cleaner 5 has a built-in vacuum pump. The output end of the vacuum pump is connected to the vacuum pipe 51. The vacuum pipe 51 is connected to the vacuum hood 52. The vacuum hood 52 is located on the side wall of the dust baffle frame 2.

[0019] In this embodiment, by providing screen holes of different diameters on the screening cylinder 33, and cooperating with the inclined arrangement of the fixing frame 1 and the screening mechanism, the sand and gravel can flow naturally by gravity during the rotation of the screening cylinder 33, and pass through different screen holes in sequence to complete multi-stage screening. This eliminates the need to replace screening components multiple times, greatly improving screening efficiency.

[0020] In this embodiment, a sealed space is formed by the combination of the fixed frame 1, the dust baffle frame 2, and two sets of fixed ring frames 31, which can prevent dust from overflowing during the screening process from the source. At the same time, the dust suction hood 52 of the dust removal mechanism is located on the side wall of the dust baffle frame 2, which can directly adsorb the dust generated in the sealed space. The dust is quickly drawn to the vacuum cleaner 5 by the built-in dust pump and dust suction pipe 51. The dual effect significantly improves the dust removal effect, effectively reduces the pollution of the working environment by dust, and protects the health of the operators.

[0021] It is worth noting that the vacuum cleaner 5 has a dust filter at the output port (not shown in the figure), and the vacuum pump is located below the dust filter.

[0022] Among them, vacuum cleaner 5 is the existing Wedel C007AI three-phase electric intelligent back-blowing vacuum cleaner. Since vacuum cleaner 5 is an existing product, its working principle and connection technology will not be described in detail here.

[0023] Please see Figures 1-3 The fixed frame 1 is also equipped with a drive assembly, which consists of a movable shaft 4, a transmission gear 41 and a drive motor 42. The movable shaft 4 is mounted on two sets of support seats on the fixed frame 1. The transmission gear 41 is fixed on the movable shaft 4 and meshes with the gear ring cylinder 32. The drive motor 42 is mounted on one set of support seats and its output shaft is connected to the movable shaft 4.

[0024] In this embodiment, the drive assembly on the fixed frame 1 consists of a movable shaft 4, a transmission gear 41, and a drive motor 42. When the drive motor 42 is working, the output shaft drives the movable shaft 4 to rotate, thereby causing the transmission gear 41 fixed on the movable shaft 4 to rotate synchronously. Since the transmission gear 41 meshes with the toothed ring cylinder 32, it can stably transmit power to the screening cylinder 33, driving it to rotate continuously. This transmission method provides efficient and stable power transmission, avoiding jamming or uneven rotation speed during the rotation of the screening cylinder 33, ensuring that the sand and gravel are fully screened in the screening cylinder 33, and further improving the screening efficiency and stability of the device.

[0025] Please see Figures 1-3 The bottom of the dustproof frame 2 is provided with two discharge ports 21, which correspond to two different sizes of screen holes on the screening cylinder 33. Directly below the two discharge ports 21, there is a collection trough 22.

[0026] In this embodiment, the bottom of the dustproof frame 2 is provided with two discharge ports 21, which correspond to two different sizes of screen holes on the screening cylinder 33. This allows the sand and gravel screened through different screen holes to be discharged from the corresponding discharge ports 21. The collection troughs 22 provided directly below the two discharge ports 21 can directly collect sand and gravel of different sizes, avoiding the mixing of sand and gravel of different grades, and realizing the simultaneous completion of screening and collection.

[0027] Please see Figure 1 , Figure 3 , Figure 4 One of the fixed ring frames 31 has a screening control component 6 on its side wall. The screening control component 6 includes an electric drive push rod 61 and a baffle ring 62. The baffle ring 62 is located in the screening cylinder 33 and its size is adapted to the inner diameter of the screening cylinder 33.

[0028] In this embodiment, the baffle ring 62 in the screening control component 6 is adapted to the inner diameter of the screening cylinder 33. Through the interval action of the baffle ring 62, the sand and gravel can be fully rotated and screened in the screening cylinder 33 of a set of sizes. After screening for a certain period of time, the baffle ring 62 is moved backward by the electric drive push rod 61, so that the remaining sand and gravel can smoothly reach the position of the screening cylinder 33 of the second size for the next screening. Through this step-by-step screening method, the interference between sand and gravel of different specifications during the screening process is avoided, and the accuracy of grading screening is significantly improved.

[0029] Specifically, the electric drive actuator 61 in this application is the existing DTZ series electric actuator. Since the electric drive actuator 61 is an existing product, its working principle will not be described in detail here.

[0030] Working principle and usage process of this utility model: First, start the drive motor 42 and the vacuum cleaner 5. The drive motor 42 drives the movable shaft 4 to rotate through the output shaft, so that the transmission gear 41 fixed on the movable shaft 4 rotates synchronously. Since the transmission gear 41 meshes with the toothed ring cylinder 32, the screening cylinder 33 rotates together. At this time, the vacuum pump built into the vacuum cleaner 5 starts to work and vacuums the sealed space in the dustproof frame 2 through the vacuum pipe 51 and the vacuum cover 52. Next, the sand and gravel to be screened are fed into the screening cylinder 33 through the fixed ring frame 31 with the feed inlet 312. Then, the feed inlet 312 is covered by a cover plate. At this time, the baffle ring 62 in the screening control component 6 is in the middle position, dividing the inside of the screening cylinder 33. The sand and gravel are confined to the area of ​​the first set of screen holes. Under the action of the rotation of the screening cylinder 33 and the inclined arrangement of the fixed frame 1 and the screening mechanism, the sand and gravel flow naturally by gravity. The sand and gravel that meet the screen hole specifications of this area pass through the screen holes and fall to the corresponding position at the bottom of the dust baffle frame 2, and fall into the collection trough 22 directly below it through the first discharge port 21. After a certain period of initial screening, the electric drive push rod 61 is activated, driving the baffle ring 62 to move backward, releasing the division inside the screening cylinder 33. The remaining sand and gravel that did not pass through the first set of screen holes are then discharged into the screening cylinder 33. Under the influence of rotation and gravity, the material continues to flow forward, reaching the area of ​​the second set of screen apertures with different sizes. The next screening step begins, with sand and gravel conforming to the screen aperture specifications passing through the apertures and falling into the corresponding collection trough 22 via the second discharge port 21. Finally, after screening is completed, turn off the drive motor 42 and the vacuum cleaner 5, and take out the graded sand and gravel from the two collection tanks 22 respectively to complete one screening operation.

[0031] 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 of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust-free sand and gravel classifying and screening device comprising a fixed frame (1), characterized in that: The fixed frame (1) is equipped with a screening mechanism and a dust removal mechanism. The screening mechanism is used to screen sand and gravel. The screening mechanism includes a frame assembly and a screening assembly (3). The frame assembly includes a dustproof frame (2) mounted on a fixed frame (1), and the screening assembly (3) is mounted in the dustproof frame (2). The screening assembly (3) includes two sets of fixed ring frames (31) and a screening cylinder (33). Both sets of fixed ring frames (31) are provided with annular grooves (311). The screening cylinder (33) has an integral structure at both ends and is provided with toothed ring cylinders (32). The screening cylinder (33) is installed in the fixed ring frames (31) on both sides through the toothed ring cylinders (32) at both ends. One set of fixed ring frames (31) is provided with a feed inlet (312). The sieve cylinder (33) is provided with sieve holes of different diameters.

2. A dusted sand and gravel classifying screen device according to claim 1, characterized in that: The fixed frame (1) is also provided with a drive assembly, which includes a movable shaft (4), a transmission gear (41) and a drive motor (42). The movable shaft (4) is provided on two sets of support seats on the fixed frame (1). The transmission gear (41) is fixed on the movable shaft (4) and meshes with the gear ring cylinder (32). The drive motor (42) is provided on one of the support seats and its output shaft is connected to the movable shaft (4).

3. A dusted sand and gravel classifying screen apparatus as claimed in claim 2, wherein: The fixed frame (1), dustproof frame (2) and two sets of fixed ring frames (31) are combined to form a closed space. Positioning plates (313) are welded to both sides of the two sets of fixed ring frames (31) and are installed on the fixed frame (1) through the positioning plates (313).

4. A dusted sand and gravel classifying screen apparatus as claimed in claim 3, wherein: The dustproof frame (2) has two discharge ports (21) at its bottom. The two discharge ports (21) correspond to two different sizes of screen holes on the screening cylinder (33). A collection trough (22) is provided directly below each of the two discharge ports (21).

5. A dusted sand and gravel sizing device as claimed in claim 3, characterized in that: The fixed frame (1) and the screening mechanism are arranged at an angle.

6. A dust-free sand and gravel classifying screen device according to claim 1, characterized in that: The dust removal mechanism includes a vacuum cleaner (5), which has a built-in vacuum pump. The output end of the vacuum pump is connected to a vacuum pipe (51), and the vacuum pipe (51) is connected to a vacuum hood (52). The vacuum hood (52) is located on the side wall of the dustproof frame (2).

7. A dust-free sand and gravel classifying screen device according to claim 3, characterized in that: One of the fixed ring frames (31) has a screening control component (6) on its side wall. The screening control component (6) includes an electric drive push rod (61) and a baffle ring (62). The baffle ring (62) is located in the screening cylinder (33), and the size of the baffle ring (62) is adapted to the inner diameter of the screening cylinder (33).

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