Multi-stage screening device

Abstract

The utility model provides a multistage screening device which comprises a base, a screening assembly and a conveying assembly, the upper side of the base is movably provided with the screening assembly, and the rear side of the base is provided with the conveying assembly used for conveying materials. Compared with the prior art, the screening device has the advantages that the protective cover with the sound insulation layer is arranged on the upper side of the screening assembly, under the condition that screening work is not affected, noise reduction can be effectively carried out on the screening assembly, the leakage speed of dust can be restrained, the quality of the surrounding environment can be improved, and the screening device is convenient to use. The two limiting plates are installed in the screen frame and matched with the first screen plate and the second screen plate, then materials can be finely screened, material mixing is avoided, and the material screening precision can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of screening equipment, and particularly relates to a multi-stage screening device. Background Art

[0002] During the operation of the multi-stage screening device, materials may be mixed. Especially during the material transmission between the multi-stage screening, due to the unreasonable design of vibration and transmission mechanism, materials of different levels may be mixed, affecting the screening effect. In addition, the vibration and noise during the operation of the equipment are also issues that cannot be ignored, which not only have a negative impact on the operating environment, but also may accelerate the wear of the equipment and reduce its service life.

[0003] In order to deal with these problems, conventional methods include: optimizing the design of the vibration and transmission mechanism of the screening device to ensure the stable transmission of materials during the screening process and avoid mixing; taking noise reduction measures during the operation of the equipment, such as adding vibration reduction devices and sound insulation materials to reduce the impact of noise and vibration on the equipment and the environment. However, these methods also have obvious disadvantages. The use of high-performance screens and optimized transmission mechanisms will significantly increase the manufacturing and maintenance costs of the equipment, resulting in an increase in overall investment; although noise reduction and vibration reduction measures can improve the operating environment, they may increase the complexity and weight of the equipment, affecting its operational flexibility and convenience; in addition, improving the design and material investment needs to consider production costs and market demand. Excessive costs may make the equipment lose competitiveness. Therefore, we hope to design a screening device with a new structure to solve this problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a multi-stage screening device to solve the problems raised in the above-mentioned background technology.

[0005] The utility model is realized by the following technical scheme: a multi-stage screening device, comprising: a base, a screening assembly and a conveying assembly, the screening assembly is movably mounted on the upper side of the base, and the conveying assembly for material conveying is arranged on the rear side of the base;

[0006] The base includes a steel frame and a spring member, two spring members are fixed to the front and rear sides of the upper end of the steel frame respectively, the sub-screening assembly includes a protective cover, a screen frame, a limit plate and a guide plate, and two vibration motors are installed on the left side of the lower end of the screen frame;

[0007] A protective cover is fixed on the upper side of the screen frame, a limit plate is fixed on the front and rear sides of the screen frame, and a guide plate is fixed on the bottom of the screen frame;

[0008] The conveying assembly comprises a conveying frame and a conveyor belt, and the conveyor belt is rotatably mounted on the upper side of the conveying frame.

[0009] As a preferred embodiment, the rear end of the protective cover is designed to be open, the outer wall of the protective cover is provided with a sound insulation layer, and a feed port is opened on the upper side of the front end of the protective cover. The setting of the protective cover can suppress excessive leakage of dust. At the same time, the protective cover equipped with a sound insulation layer can reduce the transmission of noise, which helps to improve the quality of the working ring.

[0010] As a preferred embodiment, a sieve plate 1 is fixed on the front side of the sieve frame, and the upper surface of the sieve plate 1 penetrates downward to form a plurality of evenly distributed sieve holes 1, and a sieve plate 2 is fixed on the rear side of the sieve frame, and the upper surface of the sieve plate 2 penetrates downward to form a plurality of evenly distributed sieve holes 2, and the aperture of the sieve hole 2 is larger than the aperture of the sieve hole 1.

[0011] As a preferred embodiment, the limit plate inside the front side of the screen frame and the limit plate inside the rear side of the screen frame are installed at the same inclination angle, and the two limit plates are composed of an inclined plate and comb teeth. A discharge plate three is provided at the rear end of the screen frame, and the rear end of the discharge plate three is placed on the upper left end of the conveyor belt. The setting of the limit plate can reduce the speed of material screening and ensure that the material is fully screened.

[0012] As a preferred embodiment, a plurality of comb teeth with equal spacing and linear structure distribution are fixed on the lower surface of the inclined plate, and the comb teeth are arc-shaped rods, and the lower ends of the comb teeth do not directly contact the upper sides of the sieve plates 1 and 2.

[0013] As a preferred embodiment, the guide plate includes a discharge plate one, a discharge plate two and a partition plate. The height of the rear end of the discharge plate one is greater than the height of the front end. The rear end of the discharge plate one is provided with a discharge plate two. A partition plate is provided between the rear end of the discharge plate one and the front end of the discharge plate two. The upper end of the partition plate is fixedly connected to the rear side of a lower surface of the screen plate.

[0014] As a preferred embodiment, the height of the front end of the second discharge plate is greater than the height of the rear end, a guide plate is welded at the rear end of the second discharge plate, the inclination of the guide plate is greater than the inclination of the second discharge plate, and the lower end of the guide plate is placed inside the front side of the left end of the conveying frame.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are: by arranging a protective cover with a sound insulation layer on the upper side of the sub-screening component, the noise of the sub-screening component can be effectively reduced without affecting the sub-screening work, and the leakage speed of dust can be suppressed, which can help improve the quality of the surrounding environment;

[0016] By installing two limit plates inside the screen frame, in conjunction with screen plate 1 and screen plate 2, in actual use, the material enters the front end of the screen frame through the feed port on the protective cover, that is, falls to the upper side of screen plate 1. Driven by the vibration of the screen frame, screen plate 1 drives the material to vibrate, and then the material is screened for the first time. Since the upper surface of screen plate 1 penetrates downward to form a plurality of evenly distributed screen holes 1, and the upper surface of screen plate 2 penetrates downward to form a plurality of evenly distributed screen holes 2, and the aperture of screen hole 2 is larger than that of screen hole 1, the material with larger particles moves backward on screen plate 1. When passing through the first limit plate, the inclined plate limits the material moving backward to prevent the material from passing through before it is completely screened. The material quickly enters the sieve plate two, and the comb teeth located on the lower side of the inclined plate can comb the passing material, so that when the material passes through the remaining part of the sieve plate one, it can avoid being mixed with particles of smaller size. This part of the screened material enters the discharge plate one and is discharged from the front end of the screen frame. When the material reaches the sieve plate two, the screening process is the same as the process on the sieve plate one. When the material passes through the sieve plate two, a part of the particles of the particle size range are screened out again, and this part of the material falls to the discharge plate two and is discharged through the guide plate. The remaining material that has not fallen is introduced into the transmission belt through the discharge plate three, so that the material can be finely powder screened to avoid material mixing, which helps to improve the accuracy of material screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 The utility model is a schematic diagram of the overall structure of a multi-stage screening device.

[0019] Figure 2 It is a schematic diagram of the rear side structure of a multi-stage screening device of the utility model.

[0020] Figure 3 It is a schematic diagram of the structure of a screening component of a multi-stage screening device of the utility model.

[0021] Figure 4 It is a schematic diagram of the guide plate structure of a multi-stage screening device of the utility model.

[0022] Figure 5 It is a schematic diagram of a limit plate structure of a multi-stage screening device of the utility model.

[0023] In the figure, 100-base, 110-steel frame, 120-spring member;

[0024] 200-screening assembly, 210-protective cover, 220-screen frame, 221-screen plate 1, 222-screen plate 2, 223-discharging plate 3, 230-limiting plate, 231-inclined plate, 232-comb teeth, 240-vibration motor, 250-guide plate, 251-discharging plate 1, 252-partition plate, 253-discharging plate 2, 254-guide plate;

[0025] 300- conveying assembly, 310- conveying frame, 320- conveyor belt. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 5 The utility model provides a technical solution: a multi-stage screening device, comprising: a base 100, a screening assembly 200 and a conveying assembly 300, the screening assembly 200 is movably mounted on the upper side of the base 100, and the conveying assembly 300 for material transmission is arranged on the rear side of the base 100;

[0028] The base 100 includes a steel frame 110 and a spring member 120. Two spring members 120 are fixed to the front and rear sides of the upper end of the steel frame 110. The screening assembly 200 includes a protective cover 210, a screen frame 220, a limit plate 230 and a guide plate 250. Two vibration motors 240 are installed on the left side of the lower end of the screen frame 220.

[0029] A protective cover 210 is fixed on the upper side of the screen frame 220, a limiting plate 230 is fixed on the front and rear sides of the screen frame 220, and a guide plate 250 is fixed on the bottom of the screen frame 220;

[0030] The conveying assembly 300 includes a conveying frame 310 and a conveyor belt 320 . The conveyor belt 320 is rotatably mounted on the upper side of the conveying frame 310 .

[0031] See also Figure 1 The rear end of the protective cover 210 is designed to be open, a sound insulation layer is provided on the outer wall of the protective cover 210, and a feed port is provided on the upper side of the front end of the protective cover 210. The setting of the protective cover 210 can suppress excessive leakage of dust. At the same time, the protective cover 210 equipped with a sound insulation layer can reduce the transmission of noise, which helps to improve the quality of the working environment.

[0032] As the first embodiment of the utility model, by arranging a protective cover 210 with a sound insulation layer on the upper side of the screening component 200, the noise of the screening component 200 can be effectively reduced without affecting the screening work, and the leakage rate of dust can be suppressed, which can help to improve the quality of the surrounding environment.

[0033] See also Figures 2 to 5 A sieve plate 221 is fixed on the front side of the sieve frame 220, and the upper surface of the sieve plate 221 penetrates downward to form a plurality of evenly distributed sieve holes 1. A sieve plate 222 is fixed on the rear side of the sieve frame 220, and the upper surface of the sieve plate 222 penetrates downward to form a plurality of evenly distributed sieve holes 2, and the aperture of the sieve hole 2 is larger than the aperture of the sieve hole 1.

[0034] The limiting plate 230 inside the front side of the screen frame 220 and the limiting plate 230 inside the rear side of the screen frame 220 are installed at the same inclination angle. The two limiting plates 230 are both composed of an inclined plate 231 and a comb tooth 232. A discharge plate three 223 is provided at the rear end of the screen frame 220. The rear end of the discharge plate three 223 is placed on the upper left end of the conveyor belt 320. The setting of the limiting plate 230 can reduce the speed of material screening and ensure that the material is fully screened.

[0035] A plurality of comb teeth 232 with equal spacing and linear structure distribution are fixed on the lower surface of the inclined plate 231 . The comb teeth 232 are arc-shaped rods, and the lower ends of the comb teeth 232 do not directly contact the upper sides of the sieve plate 1 221 and the sieve plate 2 222 .

[0036] The guide plate 250 includes a discharge plate 1 251, a discharge plate 253 and a partition 252. The height of the rear end of the discharge plate 1 251 is greater than the height of the front end. The discharge plate 253 is arranged at the rear end of the discharge plate 1 251. The partition 252 is arranged between the rear end of the discharge plate 1 251 and the front end of the discharge plate 253. The upper end of the partition 252 is fixedly connected to the rear side of the lower surface of the screen plate 1 221.

[0037] The height of the front end of the second discharge plate 253 is greater than the height of the rear end. A guide plate 254 is welded to the rear end of the second discharge plate 253. The inclination of the guide plate 254 is greater than the inclination of the second discharge plate 253. The lower end of the guide plate 254 is placed inside the front side of the left end of the conveying frame 310.

[0038] As a second embodiment of the present utility model, based on the above-mentioned first embodiment, in actual use, the material enters the front end of the screen frame 220 through the feed port on the protective cover 210, that is, falls to the upper side of the screen plate 1 221. Driven by the vibration of the screen frame 220, the screen plate 1 221 drives the material to vibrate, and then the material is screened for the first time. Since the upper surface of the screen plate 1 221 penetrates downward to form a plurality of evenly distributed screen holes 1, the upper surface of the screen plate 222 penetrates downward to form a plurality of evenly distributed screen holes 2, and the aperture of the screen hole 2 is greater than The aperture of the sieve hole 1 is such that the material with larger particles moves backward on the sieve plate 1 221. When passing through the first limiting plate 230, the inclined plate 231 limits the material moving backward to prevent the material from entering the sieve plate 222 too quickly when it is not completely screened. The comb teeth 232 located at the lower side of the inclined plate 231 can comb the passing material, so that when the material passes through the remaining part of the sieve plate 1 221, it can avoid being mixed with particles with smaller particle sizes. This part of the screened material enters the discharge plate 1 251 and is discharged from the front end of the sieve frame 220.

[0039] When the material reaches the sieve plate 222, the screening process is the same as that on the sieve plate 1 221. When the material passes through the sieve plate 222, a part of the particles in the particle size range are screened out again. This part of the material falls to the discharge plate 253 and is discharged through the guide plate 254. The remaining material that has not fallen is introduced into the transmission belt through the discharge plate 3 223, so that the material can be finely powdered and screened to avoid material mixing, which helps to improve the accuracy of material screening.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage screening device, comprising: A base (100), a screening assembly (200) and a conveying assembly (300), characterized in that the screening assembly (200) is movably mounted on the upper side of the base (100), and a conveying assembly (300) for material conveyance is arranged on the rear side of the base (100); The base (100) comprises a steel frame (110) and a spring member (120), two spring members (120) are respectively fixed on the front and rear sides of the upper end of the steel frame (110), the sub-screening assembly (200) comprises a protective cover (210), a screen frame (220), a limit plate (230) and a guide plate (250), and two vibration motors (240) are installed on the left side of the lower end of the screen frame (220); A protective cover (210) is fixed on the upper side of the screen frame (220), a limiting plate (230) is fixed on the front and rear sides of the screen frame (220), and a guide plate (250) is fixed on the bottom of the screen frame (220); The conveying assembly (300) comprises a conveying frame (310) and a conveyor belt (320), and the conveyor belt (320) is rotatably mounted on the upper side of the conveying frame (310).

2. A multi-stage screening device according to claim 1, characterized in that: The rear end of the protective cover (210) is designed to be open, the outer wall of the protective cover (210) is provided with a sound insulation layer, and the upper side of the front end of the protective cover (210) is provided with a feed inlet.

3. A multi-stage screening device according to claim 1, characterized in that: A sieve plate 1 (221) is fixed on the front side of the sieve frame (220), and the upper surface of the sieve plate 1 (221) penetrates downward to form a plurality of evenly distributed sieve holes 1. A sieve plate 2 (222) is fixed on the rear side of the sieve frame (220), and the upper surface of the sieve plate 2 (222) penetrates downward to form a plurality of evenly distributed sieve holes 2, wherein the aperture of the sieve hole 2 is larger than the aperture of the sieve hole 1.

4. A multi-stage screening device as claimed in claim 3, characterized in that: The limiting plate (230) inside the front side of the screen frame (220) and the limiting plate (230) inside the rear side of the screen frame (220) are installed at the same inclination angle, and the two limiting plates (230) are both composed of an inclined plate (231) and comb teeth (232). A discharge plate three (223) is provided at the rear end of the screen frame (220), and the rear end of the discharge plate three (223) is placed on the upper side of the left end of the conveyor belt (320).

5. A multi-stage screening device as claimed in claim 4, characterized in that: A plurality of comb teeth (232) with equal spacing and distributed in a linear structure are fixed on the lower surface of the inclined plate (231); the comb teeth (232) are arc-shaped rods; and the lower ends of the comb teeth (232) are not in direct contact with the upper sides of the first sieve plate (221) and the second sieve plate (222).

6. A multi-stage screening device according to claim 5, characterized in that: The guide plate (250) comprises a discharge plate 1 (251), a discharge plate 2 (253) and a partition plate (252); the height of the rear end of the discharge plate 1 (251) is greater than the height of the front end; the discharge plate 2 (253) is arranged at the rear end of the discharge plate 1 (251); a partition plate (252) is arranged between the rear end of the discharge plate 1 (251) and the front end of the discharge plate 2 (253); the upper end of the partition plate (252) is fixedly connected to the rear side of the lower surface of the sieve plate 1 (221).

7. A multi-stage screening device according to claim 6, characterized in that: The height of the front end of the second discharge plate (253) is greater than the height of the rear end, and a guide plate (254) is welded to the rear end of the second discharge plate (253). The inclination of the guide plate (254) is greater than the inclination of the second discharge plate (253), and the lower end of the guide plate (254) is placed inside the front side of the left end of the conveying frame (310).

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