A multi-stage screening drum screening machine

Abstract

The present invention provides a multi-stage screening drum screening machine, belonging to the technical field of drum screening; it includes: a frame, on the top of the frame, a driving mechanism, a feeding box, a screening component, a positioning component and a cutting component are sequentially installed, and the driving mechanism is used to drive the screening component to rotate and screen. By setting the variable-diameter sieve holes of the first screening piece, the second screening piece, the third screening piece and the fourth screening piece in the present invention, the sieve hole channels when the garbage passes through the sieve plate are continuously enlarged, reducing the screening and debugging time. The first screening piece, the second screening piece, the third screening piece and the fourth screening piece are fixed by the locking plate through bolts. According to the composition of the garbage in the screening project, the number of sleeves of the first screening piece, the second screening piece, the third screening piece and the fourth screening piece connected by bolts can be selected to freely match the sieve mesh aperture, further reducing the clogging rate, improving the screening effect of the drum screen, facilitating screening and debugging, saving time and effort, and being applicable to all screening projects.

Description

Technical Field

[0001] The present invention relates to the technical field of drum screening, and particularly relates to a drum screening machine with multi-stage screening. Background Art

[0002] With the development of economy and technology, people's living standards have been continuously improved, and domestic waste has also been increasing continuously. In the past 30 years, the treatment of domestic waste has generally been mainly landfill, and each city, county, and even town and village has its own simple landfill site. Some of them are even located in water source sensitive areas, which have a greater impact on the environment.

[0003] Since landfill sites not only occupy land, but also the annual leachate treatment cost is very high, and it will bring a series of environmental pollution problems. Under such a background, the country pays more and more attention to environmental protection and has higher and higher requirements for landfill sites. The garbage screening and treatment technology is a technology for treating landfill sites. This technology is to process the garbage in the landfill through processes such as aerobic deodorization, excavation, crushing, screening, backfilling, and external transportation, and then classify and process the screening products. The backfill soil that meets the requirements is backfilled into the original garbage pit, recyclable waste metals and other recyclable materials can be recycled, humus soil can be used as fertilizer for crops, and large light matter garbage can be compressed and transported to a sanitary landfill for landfill or incineration. It has important significance for resource recycling and reclaiming the land use value, and can realize resource recycling, replace precious land resources, and prevent pollution to the surrounding environment.

[0004] In the garbage screening and treatment technology, the drum screen is one of the core devices. The pretreated garbage is screened in the drum screen to separate the humus soil, aggregate, and oversize garbage in the garbage. The quality of the screening effect directly affects the success or failure of the screening and treatment process. During the operation of garbage screening, as time goes by, the screen plate of the drum screen will continuously clog, resulting in a continuous reduction in the screening effect. In addition, the design of the screen plate of the drum screen is often directly related to the garbage components of each landfill site. Different landfill sites have different garbage components, which leads to the need to continuously debug the drum screen and replace the screen plate of the drum screen at the initial stage of screening operation, and continuously debug to meet the requirements of the garbage screening project. However, the replaced screen plates often cannot be applied to the next project, resulting in a situation of resource waste, and it also takes a certain amount of time to redesign and customize the screen plates.

[0005] Therefore, the present application provides a drum screening machine with multi-stage screening to meet the requirements. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a multi-stage screening drum screening machine to solve the problem that when the existing drum screen operates, the screen plate is prone to blockage, which does not meet the screening operation time and operation effect, resulting in the need to re-design and customize the screen plate, which is not only time-consuming and laborious, but also the replaced screen plate is not suitable for other projects.

[0007] To solve the above technical problems, the present invention provides the following technical solutions:

[0008] A multi-stage screening drum screening machine, comprising: a frame, on the top of which a driving mechanism, a feeding box, a screening component, a positioning component and a cutting component are installed. The driving mechanism is used to drive the screening component to rotate and screen. The feeding box is fixed on one side of the screening component and is used to transfer garbage into the interior of the screening component for screening. The screening component is formed by sleeving multiple-stage screens, and the screen holes are vertically and gradually increased in a stepped shape. The positioning component is fixed on one side of the screening component and is used to clamp and position the screens with different thicknesses of the screening component. The cutting component is arranged inside the screening component and divides the materials inside the screening component.

[0009] Preferably, the screening component includes a first screening member, a second screening member, a third screening member and a fourth screening member, and they are sleeved in a drum shape in a multi-stage and multi-level screening manner. The diameters of the screen holes of the first screening member, the second screening member, the third screening member and the fourth screening member are gradually increased.

[0010] Preferably, threaded holes are provided at the top of one side of the first screening member, the second screening member, the third screening member and the fourth screening member, and they are concentrically arranged. Hinges are fixed inside the first screening member, the second screening member, the third screening member and the fourth screening member, and locking plates are installed on the outside. Strip-shaped screening holes are evenly provided on one side inside the first screening member, the second screening member, the third screening member and the fourth screening member.

[0011] Preferably, an installation disk sleeve is rotatably installed on the top of the frame. The positioning component is fixed inside the installation disk sleeve. The output end of the driving mechanism is rotatably installed on one side inside the installation disk sleeve through a rotating shaft. The cutting component is evenly arranged on the rotating shaft fixed to the output end of the driving mechanism.

[0012] Preferably, the positioning component includes a positioning plate, a wire groove, a first rotating gear and a second rotating gear. The positioning plate is slidably installed inside the wire groove. A support plate is installed inside the installation disk sleeve. The wire groove is provided on one side of the support plate. The first rotating gear and the support plate are concentrically arranged and are rotatably installed on one side of the support plate. The second rotating gear is vertically meshed with the first rotating gear.

[0013] Preferably, a telescopic member is fixed to one side of the support plate. The output end of the telescopic member abuts against one side of the first rotating tooth. A sliding groove is formed on one side of the mounting disk sleeve. The positioning plate is slidably installed inside the sliding groove. An arc-shaped groove is formed on the surface of the first rotating tooth. The bottom of the positioning plate is slidably installed inside the arc-shaped groove.

[0014] Preferably, the first screening member, the second screening member, and the third screening member are all installed inside one side of the mounting disk sleeve. The fourth screening member is sleeved outside one side of the mounting disk sleeve. One side of the positioning plate is pressed against the outside of the fourth screening member.

[0015] Preferably, a discharge opening is installed at the bottom of the feed box. A support disk is fixed to one side of the feed box. One side of the support disk is fixedly installed with the output end of the driving mechanism. First dividing members are evenly installed on the outside of the support disk.

[0016] Preferably, the cutting assembly includes a first cutter disk group, a first grooving cutter, a second cutter disk group, and a second grooving cutter. The diameter of the first cutter disk group is smaller than that of the second cutter disk group. One side of the first grooving cutter is fixedly installed with one side of the first cutter disk group, and the other side is fixed to the rotating shaft of the output end of the driving mechanism. The second cutter disk group is coaxially arranged with the first cutter disk group.

[0017] Preferably, a second dividing member is clamped to one side of the positioning assembly. One side of the second grooving cutter is fixedly installed with one side of the second cutter disk group. The first grooving cutter and the second grooving cutter are installed in a multi-group staggered manner. A gap is left between one side of the first grooving cutter and one side of the second dividing member.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In the above solution, by setting the variable-diameter sieve holes of the first screening member, the second screening member, the third screening member, and the fourth screening member, the sieve hole channels when the garbage passes through the sieve plate are continuously enlarged, thereby reducing the hole-blocking rate, improving the screening operation effect and time, reducing the screening debugging time. In addition, during the installation process, the first screening member, the second screening member, the third screening member, and the fourth screening member are in a folded structure through hinges. The first screening member, the second screening member, the third screening member, and the fourth screening member are fixed by the lock plate through bolts. Bolts are inserted into the threaded holes on one side of the first screening member, the second screening member, the third screening member, and the fourth screening member for fixation. The sleeving quantity of the bolts connecting the first screening member, the second screening member, the third screening member, and the fourth screening member can be selected according to the composition of the garbage in the screening project, and the sieve mesh apertures can be freely matched, further reducing the hole-blocking rate, improving the screening effect of the drum screen, facilitating screening debugging, saving time and effort, and being applicable to all screening projects.

[0020] By setting the positioning plate to slide inside the chute, one side of the positioning plate is driven to press against the top of the first screening member for fixation. At the same time, the telescopic member is activated to abut and limit one side of the first rotating tooth, preventing the first rotating tooth from rotating and causing the pressing force of the positioning plate against the first screening member to become loose. This structure pre-tightens and fixes the screening assembly, enabling the rapid installation and disassembly of the drum screen, achieving the purpose of quickly adjusting the screening form of the drum screen, thereby improving the screening operation time and screening effect.

[0021] By setting the output end of the drive mechanism to rotate and drive the rotating shaft to rotate, the first cutter disc group and the second groove cutter installed on the rotating shaft are driven to divide the garbage. At the same time, the first groove cutter and the second groove cutter are driven to divide the garbage at different positions, further preventing the occurrence of material blockage and improving the screening efficiency.

[0022] By setting the diameter of the first cutter disc group to be smaller than that of the second cutter disc group, when the rotational speed of the drive mechanism is slow, the first cutter disc group divides the garbage. When the rotational speed of the drive mechanism is fast, due to the generation of centrifugal force, most of the garbage adheres to the first screening member, and the second cutter disc group touches and divides the garbage on the wall of the first screening member, increasing the screening efficiency of the garbage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present disclosure and, together with the specification, are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0024] Figure 1 It is a schematic three-dimensional overall structure diagram of a drum screening machine for multi-stage screening;

[0025] Figure 2 For Figure 1 An enlarged three-dimensional structure diagram of part A of ;

[0026] Figure 3 It is a schematic three-dimensional assembly structure diagram of a strip-shaped screening hole, a hinge, and its locking plate;

[0027] Figure 4 It is a schematic three-dimensional assembly structure diagram of a mounting disk sleeve, a positioning assembly, and its cutting assembly;

[0028] Figure 5 It is a schematic enlarged three-dimensional structure diagram of the cutting assembly;

[0029] Figure 6 It is a schematic enlarged three-dimensional structure diagram of the positioning assembly;

[0030] Figure 7 It is a schematic enlarged three-dimensional side view structure diagram of the positioning assembly;

[0031] Figure 8 It is a schematic diagram of the three-dimensional explosion structure of the positioning component.

[0032] [Reference Signs]

[0033] 1. Frame; 2. Driving mechanism; 3. Feed box; 4. Screening assembly; 5. Mounting disc sleeve; 6. Positioning assembly; 7. Cutting assembly; 8. Support disc; 9. First dividing piece; 10. Second dividing piece; 11. Feeding port; 41. First screening piece; 42. Second screening piece; 43. Third screening piece; 44. Fourth screening piece; 45. Strip screening holes; 46. Hinge; 47. Locking plate; 61. Positioning plate; 62. Wire groove; 63. First rotating tooth; 64. Second rotating tooth; 65. Support plate; 66. Telescopic piece; 67. Slide groove; 68. Arc groove; 71. First cutter disc group; 72. First slotting knife; 73. Second cutter disc group; 74. Second slotting knife.

[0034] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0035] The following is a detailed description of a multi-stage screening drum screening machine provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0036] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0037] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can refer to any feature, structure, or characteristic in a singular sense, or can refer to a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, can alternatively, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0038] It will be understood that the meanings of "on", "above", and "over" in this disclosure should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0039] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience in describing the relationship of one element or feature to another or other elements or features, as shown in the figures. Spatial relative terms are intended to encompass different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device can be oriented in other ways, and the spatial relative descriptors used herein can be interpreted accordingly.

[0040] As Figure 1 and Figure 3As shown in the figure, an embodiment of the present invention provides a multi-stage screening drum screening machine, including: a frame 1, on the top of the frame 1, a driving mechanism 2, a feeding box 3, a screening assembly 4, a positioning assembly 6 and a cutting assembly 7 are installed. The driving mechanism 2 is used to drive the screening assembly 4 to rotate and screen. The feeding box 3 is fixed on one side of the screening assembly 4 and is used to transfer garbage into the interior of the screening assembly 4 for screening. The screening assembly 4 is formed by sleeving multi-stage sieves, and the sieve holes are vertically stepped up in a ladder shape. The positioning assembly 6 is fixed on one side of the screening assembly 4 and is used to clamp and position the sieves with different thicknesses of the screening assembly 4. The cutting assembly 7 is arranged inside the screening assembly 4 and divides the materials inside the screening assembly 4. The screening assembly 4 includes a first screening member 41, a second screening member 42, a third screening member 43 and a fourth screening member 44, and they are sleeved in a drum shape in a multi-stage manner for multi-stage screening. The sieve hole diameters of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44 increase step by step. Threaded holes are opened at the top of one side of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44, and they are concentrically arranged. Hinges 46 are fixed on the inner sides of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44, and locking plates 47 are installed on the outer sides. Strip-shaped screening holes 45 are evenly opened on one side inside the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44. During the screening process, the strip-shaped screening holes 45 initially screen out the garbage. The driving mechanism 2 is a motor. Among them, the thickness of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44 is at least 2 mm. The thinner the thickness, the larger the sieve hole diameter, and the smaller the blockage rate of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44, while reducing the limitation of the installation space. The sieve hole diameter of the first screening member 41 is 20 mm, the sieve hole diameter of the second screening member 42 is 21 mm, the sieve hole diameter of the third screening member 43 is 22 mm, and the sieve hole diameter of the fourth screening member 44 is 23 mm. Their cross-sections form a gradually increasing trapezoidal shape. During the rotation screening process, the sieve holes of the first screening member 41 face inward, and the sieve holes of the fourth screening member 44 face outward. When the garbage passes through the variable-diameter sieve holes of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44, the sieve hole channels when the garbage passes through the sieve plate are constantly increasing, thereby reducing the blockage rate, improving the screening operation effect and time, and reducing the screening debugging time. In addition, during the installation process, the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44 are formed into a folded structure through the hinges 46, and the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44 are fixed by the locking plates 47 through bolts. Bolts are inserted into the threaded holes on one side of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44 for fixation. According to the composition of the garbage in the screening project,Select the sleeving quantity of bolts connecting the first screening part 41, the second screening part 42, the third screening part 43 and the fourth screening part 44, freely match the screen hole diameters, further reduce the hole blocking rate, improve the screening effect of the drum screen, facilitate screening debugging, save time and effort, and are applicable to all screening projects.

[0041] The present invention standardizes and customizes the drum screen, freely combines it according to the use scenario, there is no situation where the sieve plate of this project is not applicable in the next project and is scrapped, and it is convenient for debugging and installation.

[0042] In this embodiment, as Figure 4 shown, an installation disk sleeve 5 is rotatably installed at the top of the frame 1, the positioning assembly 6 is fixed inside the installation disk sleeve 5, the output end of the driving mechanism 2 is rotatably installed inside one side of the installation disk sleeve 5 through a rotating shaft, and the cutting assemblies 7 are evenly arranged on the rotating shaft fixed to the output end of the driving mechanism 2. While the driving mechanism 2 provides driving conditions for the cutting assemblies 7, the garbage located inside the screening assembly 4 is divided and dispersed to improve the screening effect of the drum screen.

[0043] In this embodiment, as Figure 1 、 Figures 6 - 8As shown in the figure, the positioning component 6 includes a positioning plate 61, a wire groove 62, a first rotating gear 63 and a second rotating gear 64. The positioning plate 61 is slidably installed inside the wire groove 62. A support plate 65 is installed inside the mounting disc sleeve 5. The wire groove 62 is opened on one side of the support plate 65. The first rotating gear 63 and the support plate 65 are concentrically arranged and rotatably installed on one side of the support plate 65. The second rotating gear 64 is vertically meshed with the first rotating gear 63, and one side of the first rotating gear 63 is rotatably installed on one side of the support plate 65. A telescopic member 66 is fixed on one side of the support plate 65. The output end of the telescopic member 66 abuts against one side of the first rotating gear 63. A chute 67 is opened on one side of the mounting disc sleeve 5. The positioning plate 61 is slidably installed inside the chute 67. An arc groove 68 is opened on the surface of the first rotating gear 63. The bottom of the positioning plate 61 slides inside the arc groove 68. The first screening member 41, the second screening member 42 and the third screening member 43 are all installed inside one side of the mounting disc sleeve 5. The fourth screening member 44 is sleeved on the outside of one side of the mounting disc sleeve 5. One side of the positioning plate 61 is pressed against the outside of the fourth screening member 44. Among them, threaded holes (not shown in the figure) adapted to the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44 are opened at the top of one side of the mounting disc sleeve 5 to facilitate the installation and debugging of the first screening member 41, the second screening member 42, the third screening member 43 and the fourth screening member 44. When positioning and installing the screening component 4, rotate the second rotating gear 64. The second rotating gear 64 meshes with the first rotating gear 63 and rotates along the center of the support plate 65. The bottom of the positioning plate 61 slides and changes position along the arc groove 68 opened on the surface of the first rotating gear 63, so that the positioning plate 61 slides inside the wire groove 62, driving one side of the positioning plate 61 to press against the top of the first screening member 41 for fixation. Among them, the telescopic member 66 includes but is not limited to a hydraulic cylinder or a pneumatic cylinder. At the same time, start the telescopic member 66 to abut and limit one side of the first rotating gear 63 to prevent the first rotating gear 63 from rotating and causing the pressing force of the positioning plate 61 against the first screening member 41 to become loose. This structure pre-tightens and fixes the screening component 4, can realize the quick installation and disassembly of the drum screen, and achieves the purpose of quickly adjusting the screening form of the drum screen, thereby improving the screening operation time and screening effect.

[0044] In this embodiment, as Figure 1 and Figure 6As shown, a discharge opening 11 is installed at the bottom of the feed box 3 to discharge the screened garbage. A support disk 8 is fixed on one side of the feed box 3. One side of the support disk 8 is fixedly installed with the output end of the driving mechanism 2. A first dividing member 9 is evenly installed on the outside of the support disk 8. The first dividing member 9 is provided to initially crush the just-placed garbage. A second dividing member 10 is clamped on one side of the positioning assembly 6. The second dividing member 10 is clamped on one side of the mounting disk sleeve 5. During the screening process of the garbage, through the two-way division of the first dividing member 9 and the second dividing member 10, the garbage is divided into waste materials with a small diameter. A gap is left between the second dividing member 10 and the inner side of the mounting disk sleeve 5. The setting of the gap provides an installation space for the installation of the first screening member 41, the second screening member 42, and the third screening member 43, increasing the adaptability during installation.

[0045] In this embodiment, as Figure 4 and Figure 5 shown, the cutting assembly 7 includes a first cutter disk group 71, a first grooved cutter 72, a second cutter disk group 73, and a second grooved cutter 74. The diameter of the first cutter disk group 71 is smaller than that of the second cutter disk group 73. When the rotational speed of the driving mechanism 2 is slow, the first cutter disk group 71 divides the garbage. When the rotational speed of the driving mechanism 2 is fast, due to the generation of centrifugal force, most of the garbage adheres to the first screening member 41, and the second cutter disk group 73 touches and divides the garbage on the wall of the first screening member 41, increasing the screening efficiency of the garbage. One side of the first grooved cutter 72 is fixedly installed with one side of the first cutter disk group 71, and the other side is fixed to the rotating shaft of the output end of the driving mechanism 2. The second cutter disk group 73 and the first cutter disk group 71 are coaxially arranged. One side of the second grooved cutter 74 is fixedly installed with one side of the second cutter disk group 73. The first grooved cutter 72 and the second grooved cutter 74 are installed in a multi-group staggered manner. A gap is left between one side of the first grooved cutter 72 and one side of the second dividing member 10 to prevent the second dividing member 10 from colliding with the first grooved cutter 72 during rotation, causing mechanical damage. During the screening process of the garbage, the output end of the driving mechanism 2 rotates to drive the rotating shaft to rotate, thereby driving the first cutter disk group 71 and the second grooved cutter 74 installed on the rotating shaft to divide the garbage, and at the same time driving the first grooved cutter 72 and the second grooved cutter 74 to divide the garbage at different positions, further preventing the occurrence of material blockage and improving the screening efficiency.

[0046] The technical solution provided by the present invention, by setting the variable-diameter sieve holes of the first screening member, the second screening member, the third screening member and the fourth screening member, makes the sieve hole channels of the garbage continuously increase when passing through the sieve plate, thereby reducing the clogging rate, improving the screening operation effect and time, and reducing the screening commissioning time. In addition, during the installation process, the first screening member, the second screening member, the third screening member and the fourth screening member are in a folded structure through hinges, and the first screening member, the second screening member, the third screening member and the fourth screening member are fixed by bolts through a locking plate. Bolts are inserted into the threaded holes on one side of the first screening member, the second screening member, the third screening member and the fourth screening member for fixing. The number of sleeves of the first screening member, the second screening member, the third screening member and the fourth screening member connected by bolts can be selected according to the composition of the garbage in the screening project, and the sieve aperture can be freely matched, further reducing the clogging rate, improving the screening effect of the drum screen, facilitating screening commissioning, saving time and effort, and being applicable to all screening projects.

[0047] By setting the positioning plate to slide inside the groove, driving one side of the positioning plate to press and fix on the top of the first screening member, and at the same time starting the telescopic member to abut and limit one side of the first rotating tooth to prevent the first rotating tooth from rotating and causing the pressing force of the positioning plate on the first screening member to loosen. This structure pre-tightens and fixes the screening assembly, can realize the rapid installation and disassembly of the drum screen, and achieves the purpose of quickly adjusting the screening form of the drum screen, thereby improving the screening operation time and screening effect.

[0048] By setting the output end of the driving mechanism to rotate and drive the rotating shaft to rotate, and then drive the first cutter head group and the second groove cutter installed on the rotating shaft to divide the garbage, and at the same time drive the first groove cutter and the second groove cutter to divide the garbage at different positions, further preventing the occurrence of material blockage and improving the screening efficiency.

[0049] By setting the diameter of the first cutter head group to be smaller than that of the second cutter head group, when the rotation speed of the driving mechanism is slow, the first cutter head group divides the garbage. When the rotation speed of the driving mechanism is fast, due to the generation of centrifugal force, most of the garbage adheres to the first screening member, and the second cutter head group touches and divides the garbage on the wall of the first screening member, increasing the screening efficiency of the garbage.

[0050] The present invention covers any alternatives, modifications, equivalent methods and solutions made within the essence and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0051] Those of ordinary skill in the art can understand that all or part of the steps in the methods of the above embodiments can be completed by instructing relevant hardware through a program, and this program can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disks, optical discs, etc.

[0052] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-stage screening drum screening machine, comprising: Frame, characterized in that a driving mechanism, a feeding box, a screening assembly, a positioning assembly and a cutting assembly are installed on the top of the frame; The driving mechanism is used to drive the screening assembly to rotate and screen. The feeding box is fixed on one side of the screening assembly and is used to transfer garbage into the interior of the screening assembly for screening. The screening assembly is formed by sleeving multiple levels of sieve meshes, and the sieve holes are vertically increased step by step in a stepped shape. The positioning assembly is fixed on one side of the screening assembly and is used to clamp and position sieve meshes with different thicknesses of the screening assembly. The cutting assembly is arranged inside the screening assembly and divides the materials inside the screening assembly; The screening assembly includes a first screening member, a second screening member, a third screening member and a fourth screening member, and is sleeved step by step in a drum shape for multi-level screening. The diameters of the sieve holes of the first screening member, the second screening member, the third screening member and the fourth screening member increase step by step; according to the composition of the garbage in the screening project, the sleeving quantity of the first screening member, the second screening member, the third screening member and the fourth screening member is selected to freely match the sieve hole diameters; An installation disk sleeve is rotatably installed on the top of the frame. The positioning assembly is fixed inside the installation disk sleeve. The positioning assembly includes a positioning plate, a wire groove, a first rotating tooth and a second rotating tooth. The positioning plate is slidably installed inside the wire groove. A support plate is installed inside the installation disk sleeve. The wire groove is opened on one side of the support plate. The first rotating tooth and the support plate are concentrically arranged and are rotatably installed on one side of the support plate. The second rotating tooth is vertically meshed with the first rotating tooth. An arc groove is opened on the surface of the first rotating tooth. The bottom of the positioning plate is slidably installed inside the arc groove.

2. The multi-stage screening drum screening machine according to claim 1, characterized in that, Threaded holes are opened at the top of one side of the first screening member, the second screening member, the third screening member and the fourth screening member, and they are concentrically arranged. Hinges are fixed on the inner sides of the first screening member, the second screening member, the third screening member and the fourth screening member, and locking plates are installed on the outer sides. Strip-shaped screening holes are uniformly opened on one side inside the first screening member, the second screening member, the third screening member and the fourth screening member.

3. The multi-stage screening drum screening machine according to claim 2, characterized in that, The output end of the driving mechanism is rotatably installed on one side inside the installation disk sleeve through a rotating shaft. The cutting assembly is uniformly arranged on the rotating shaft fixed to the output end of the driving mechanism.

4. The multi-stage screening drum screening machine according to claim 1, characterized in that, A telescopic member is fixed on one side of the support plate. The output end of the telescopic member abuts against one side of the first rotating tooth. A sliding groove is opened on one side of the installation disk sleeve. The positioning plate is slidably installed inside the sliding groove.

5. The multi-stage screening drum screening machine according to claim 1, characterized in that, The first screening member, the second screening member and the third screening member are all installed inside one side of the installation disk sleeve. The fourth screening member is sleeved outside one side of the installation disk sleeve. One side of the positioning plate is pressed against the outside of the fourth screening member.

6. The multi-stage screening drum screening machine according to claim 1, characterized in that, A blanking port is installed at the bottom of the feeding box. A support disk is fixed on one side of the feeding box. One side of the support disk is fixedly installed with the output end of the driving mechanism. First dividing members are uniformly installed on the outside of the support disk.

7. The multi-stage screening drum screening machine according to claim 1, wherein The cutting assembly includes a first cutter head group, a first grooving cutter, a second cutter head group and a second grooving cutter. The diameter of the first cutter head group is smaller than that of the second cutter head group. One side of the first grooving cutter is fixedly installed with one side of the first cutter head group, and the other side is fixed to the rotating shaft at the output end of the driving mechanism. The second cutter head group and the first cutter head group are coaxially arranged.

8. The multi-stage screening drum screening machine according to claim 7, characterized in that, A second dividing member is clamped on one side of the positioning assembly. One side of the second grooving cutter is fixedly installed with one side of the second cutter head group. Multiple groups of the first grooving cutter and the second grooving cutter are installed in a staggered manner, and a gap is left between one side of the first grooving cutter and one side of the second dividing member.

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