Hazardous waste screening device

Abstract

The invention relates to the technical field of screening devices, in particular to a hazardous waste screening device which comprises a mounting frame, a screening drum, a driving part and a spiral ring, and a supporting rotating assembly is arranged on the mounting frame; the screen drum is rotationally arranged on the mounting frame through a supporting and rotating assembly, the screen drum comprises a feeding port and a discharging port, the feeding port is used for receiving materials, and the discharging port is used for discharging the materials; the driving part is arranged on the mounting frame and can drive the screen drum to circularly rotate in the first direction and the second direction; the spiral circular ring is coaxially arranged in the screen drum, and when the screen drum rotates in the first direction, the spiral circular ring can push materials to move from the feeding port to the discharging port; the rotating speed of the screen drum in the first direction is smaller than that in the second direction. According to the hazardous waste screening device, hazardous waste materials which are mixed together and are different in size and mass can be screened.

Description

Technical Field

[0001] The invention relates to the technical field of screening devices, and in particular to a hazardous waste screening device. Background Art

[0002] Hazardous waste refers to solid waste that is included in the national hazardous waste list or is identified as having hazardous characteristics according to the national hazardous waste identification standards and identification methods. It generally has characteristics such as toxicity, corrosiveness, flammability and infectiousness.

[0003] Common solid hazardous wastes generally include syringe needles, infusion sets, batteries, fluorescent tubes and slag waste. When handling these solid hazardous wastes, they are generally screened in advance.

[0004] The existing Chinese patent named "A screening component and its screening machine" and publication number "CN221453246U" discloses a screening component and its screening machine, including a screening cylinder, in which a material guide plate is provided, and the material guide plate is in the shape of an inclined plate spirally wound. When the screening cylinder rotates, the material guide plate can guide and push the material in the screening cylinder. In the process of pushing the material, the material will pass through the screening net with gradually increasing filter holes, thereby achieving the purpose of screening the material. In the technical scheme disclosed in the above-mentioned prior art, when screening the material, the material is screened by rolling the material in the screening cylinder. If the material is mixed densely, it is difficult to effectively screen the material only by rolling screening. Summary of the invention

[0005] The invention provides a hazardous waste screening device to solve the existing problem that it is difficult to screen solid hazardous wastes in which large and small particles are mixed together.

[0006] A hazardous waste screening device of the present invention adopts the following technical solution: A hazardous waste screening device comprises a mounting frame, a screen drum, a driving member and a spiral ring, wherein a supporting rotating assembly is arranged on the mounting frame; the screen drum is rotatably arranged on the mounting frame through the supporting rotating assembly, and the screen drum comprises a feed port and a discharge port, the feed port is used to receive materials, and the discharge port is used to discharge materials; the driving member is arranged on the mounting frame, and the driving member can drive the screen drum to cyclically rotate in a first direction and a second direction; the spiral ring is coaxially arranged in the screen drum, and when the screen drum rotates in the first direction, the spiral ring can push the material to move from the feed port toward the discharge port; wherein the rotation speed of the screen drum in the first direction is less than the rotation speed in the second direction.

[0007] Furthermore, the supporting rotating assembly comprises a rotating shaft arranged on the frame and a supporting wheel installed on the rotating shaft, the screen drum is placed on the supporting wheel, and the screen drum can rotate with the rotating shaft.

[0008] Furthermore, an abutment ring is provided between the support wheel and the screen drum, the abutment ring is fixed to one end of the screen drum, and the outer annular surface of the abutment ring abuts against the wheel surface of the driving wheel.

[0009] Furthermore, the driving member is a driving motor, the output shaft of the driving motor is fixedly connected to the rotating shaft, and the driving motor can drive the rotating shaft to rotate.

[0010] Furthermore, a feed cylinder is provided on the mounting frame, and the feed cylinder is arranged on one side of the feed port of the screen cylinder. One end of the feed cylinder extends into the feed port of the screen cylinder and can release materials to the screen cylinder.

[0011] Furthermore, the mounting frame is provided with side baffles, the side baffles are respectively located on both sides of the screen cylinder, and the side baffles are used to resist the materials screened out from the cylinder wall of the screen cylinder.

[0012] Furthermore, it includes a stirring mechanism, which includes a stirring shaft, stirring blades and a stirring member. The stirring shaft is rotatably arranged on the mounting frame through a vertical rod, the stirring shaft is parallel to the axial direction of the screen cylinder, one end of the stirring shaft is inserted into the screen cylinder, the stirring blades are arranged on the stirring shaft and are located in the screen cylinder, the stirring member is arranged on the frame, the stirring member drives the stirring shaft to rotate, and the stirring blades can impact and crush materials that fall on the blades.

[0013] Furthermore, the axial center axis of the stirring shaft is located directly below the axial center axis of the sieve drum.

[0014] Furthermore, the stirring element includes a stirring motor, a rotating wheel and a driving belt. The stirring motor is installed on the mounting frame. A stirring wheel is arranged on the output shaft of the stirring motor. The rotating wheel is arranged at the end of the stirring shaft that is not inserted into the sieve cylinder. The driving belt is sleeved on the stirring wheel and the rotating wheel. The stirring motor can drive the rotating wheel to rotate through the driving belt.

[0015] Furthermore, a side of the spiral ring facing the discharge port is an inclined surface.

[0016] The beneficial effects of the present invention are as follows: the hazardous waste screening device of the present invention can screen mixed materials of different sizes and masses; After the waste material is put into the screen drum from the feed port, its driving member drives the screen drum to rotate. When the screen drum rotates in the first direction, the material can approach the discharge port from the feed port of the screen drum, and in the process of moving the material, some small-volume and small-mass materials can be separated from the screen drum from the screen hole. When the screen drum rotates in the second direction, due to the fast speed, the large-volume and large-mass materials may slip between the spiral ring, so that the large-volume and large-mass materials move very little or even do not move in the screen drum, and the small-volume and small-mass materials may be temporarily attached to the inner wall of the screen drum due to the centrifugal force. The small-volume and small-mass materials may be thrown toward the feed port in the process of approaching the top of the screen drum. When the screen drum rotates cyclically in the first direction and the second direction, the large-volume and large-mass materials can be separated from the screen drum from the discharge port, and the small-volume and small-mass materials can be separated from the screen drum from the screen hole or the feed end, thereby realizing the screening of waste materials of different sizes and masses. The screened waste materials can be handed over to the corresponding equipment / device for treatment, which can reduce the adverse effects of the mixture of hazardous waste on the environment and human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the overall structure of a hazardous waste screening device provided in some embodiments of the present invention; Figure 2 A schematic diagram of the overall structure of a hazardous waste screening device from another perspective provided by some embodiments of the present invention; Figure 3 A right side view of a hazardous waste screening device provided in some embodiments of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part B; Figure 6 is a schematic diagram of the movement of materials in a temporary trough when the screen drum rotates in a counterclockwise direction at a second speed in some embodiments of the present invention; Figure 7 It is a schematic diagram of the movement of materials in the temporary trough when the screen drum rotates in the clockwise direction at the second speed in other embodiments of the present invention.

[0019] In the figure: 100, mounting frame; 110, supporting rotating assembly; 111, rotating shaft; 112, supporting wheel; 120, side baffle; 130, feeding cylinder; 200, sieve cylinder; 210, feeding port; 220, discharging port; 230, abutting ring; 300, spiral ring; 301, temporary groove; 400, driving member; 500, stirring mechanism; 510, stirring shaft; 520, stirring blade; 530, stirring member; 531, stirring motor; 532, rotating wheel; 533, driving belt; 600, inclined plane. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] See also Figure 1-Figure 7 , Figure 1 A schematic diagram of the overall structure of a hazardous waste screening device provided in some embodiments of the present invention; Figure 2A schematic diagram of the overall structure of a hazardous waste screening device from another perspective provided by some embodiments of the present invention; Figure 3 A right side view of a hazardous waste screening device provided in some embodiments of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part B; Figure 6 is a schematic diagram of the movement of materials in a temporary trough when the screen drum rotates in a counterclockwise direction at a second speed in some embodiments of the present invention; Figure 7 It is a schematic diagram of the movement of materials in the temporary trough when the screen drum rotates in the clockwise direction at the second speed in other embodiments of the present invention.

[0024] It should be noted that in the present invention, when the screen drum 200 and the columnar structure are rotating, if it is not specified what the columnar structure rotates around, it is assumed that the columnar structure rotates around its axial central axis, that is, the columnar structure rotates clockwise or counterclockwise. The structure of the spiral ring 300 is similar to a spring, and the spiral direction of the spiral ring 300 can be determined by judging the spiral direction of the spring. When judging the spiral direction of the spring, the spring can be placed vertically on a horizontal plane. Looking from top to bottom, the spring wire can only be a clockwise spiral or a counterclockwise spiral. The clockwise direction is right-handed, and the counterclockwise direction is left-handed. Therefore, the spiral direction of the spiral ring 300 can be determined based on whether the spring is left-handed or right-handed.

[0025] A hazardous waste screening device provided by an embodiment of the present invention comprises a mounting frame 100, a screen drum 200, a spiral ring 300 and a driving member 400. The mounting frame 100 is arranged on the ground, and a supporting rotating assembly 110 is arranged on the mounting frame 100. The screen drum 200 is rotatably arranged on the mounting frame 100 through the supporting rotating assembly 110, and the screen drum 200 comprises a feed port 210 and a discharge port 220, wherein the feed port 210 is used to receive the material to be screened, and the discharge port 220 is used to discharge the material. The spiral ring 300 is placed in the screen drum 200 and is coaxially arranged with the screen drum 200, and the outer ring wall of the spiral ring 300 abuts against the inner cylinder wall of the screen drum 200. When the screen drum 200 rotates, it can drive the spiral ring 300 to rotate synchronously. The driving member 400 is arranged on the mounting frame 100, and can drive the screen drum 200 to rotate cyclically in the first direction and the second direction.

[0026] Specifically, the mounting frame 100 may be a frame with strong load-bearing / supporting capacity. The screen drum 200 may be a hollow cylinder without blocking at both ends, and the wall of the screen drum 200 is covered with screen holes, and some smaller waste materials can pass through the screen holes. The supporting rotating assembly 110 may be a plurality of rotatable structural members such as universal balls or rollers, and the rotating structural member here refers to a member that can both carry the screen drum 200 and enable the screen drum 200 to rotate on the mounting frame 100. Of course, the supporting rotating assembly 110 may also be a combination of the above-mentioned rotating structural members.

[0027] The driving member 400 may be a power source such as an engine or a motor installed on the mounting frame 100 that can drive the screen drum 200 to rotate on the mounting frame 100. The driving member 400 can indirectly drive the screen drum 200 to rotate by driving the aforementioned rotating structural member to rotate. Of course, if the end of the screen drum 200 is provided with a plate member / shaft body that can pass through the center of the end face of the screen drum 200 and is perpendicular to the axial direction of the screen drum 200, the driving member 400 can also directly drive the plate member / shaft body at the end of the screen drum 200 to rotate, thereby achieving the purpose of driving the screen drum 200 to rotate.

[0028] When the screen drum 200 is screening waste materials, the waste materials can be put into the screen drum 200 from the feed port 210 of the screen drum 200, and the driving member 400 drives the screen drum 200 to rotate. When the screen drum 200 rotates, small particles of waste materials can be discharged from the screen holes on the side wall of the screen drum 200, while larger waste materials can be discharged from the discharge port 220 of the screen drum 200.

[0029] The driving member 400 can drive the screen drum 200 to cyclically rotate in a first direction and a second direction, the second direction being opposite to the first direction, and the rotation speed of the screen drum 200 in the first direction is lower than the rotation speed in the second direction. When the screen drum 200 rotates in the first direction, the spiral ring 300 can push the material to move from the feed port 210 toward the discharge port 220.

[0030] From the direction of the feed port 210 toward the discharge port 220, the first direction can be clockwise or counterclockwise. When the first direction is clockwise, in order to ensure that the spiral ring 300 can push the material in the screen drum 200 to move, the spiral direction of the spiral ring 300 can only be left-handed, and at this time, the ring surface of the spiral ring 300 is wound in the counterclockwise direction with the central axis of the spiral ring 300 as the reference; when the first direction is counterclockwise, the spiral direction of the spiral ring 300 can only be right-handed, and the ring surface of the spiral ring 300 is wound in the clockwise direction with the central axis of the spiral ring 300 as the reference.

[0031] When the driving member 400 drives the screen drum 200 to rotate in the first direction, the rotation direction of the screen drum 200 is always opposite to the winding direction of the ring surface of the spiral ring 300. Therefore, no matter whether the first direction is clockwise or counterclockwise, when the spiral ring rotates in the first direction, the material falling on the ring surface of the spiral ring 300 can move from the feed port 210 to the discharge port 220.

[0032] The screen drum 200 always rotates in a first direction and a second direction under the action of the driving member 400, that is, the screen drum 200 can rotate in the first direction for a period of time and then rotate in the second direction for a period of time under the action of the driving member 400, and repeat the cycle. For example, the screen drum 200 rotates in the clockwise direction for a period of time and then rotates counterclockwise, and then rotates in the clockwise direction, and repeats the cycle. The rotation speed of the screen drum 200 in the first direction can be half of the rotation speed of the screen drum 200 in the second direction or less.

[0033] The rotation speed of the screen drum 200 in the first direction is defined as the first speed, and the rotation speed of the screen drum 200 in the second direction is defined as the second speed. The first speed is not greater than half of the second speed, but cannot be zero. The time for the screen drum 200 to rotate in the first direction and the second direction can be set to the same duration, and the specific situation needs to be appropriately adjusted according to the actual situation. For example, if there are more materials with large volume and mass in the waste material, the first speed can be slightly smaller, and the second speed can be slightly larger, because when the materials with large volume and mass are on the spiral ring 300, if the first speed is too large, the materials with large volume and mass are likely to slip between the spiral ring 300 due to inertia, and thus cannot move on the spiral ring 300, nor can they approach the discharge port 220. If the second speed is too small, the materials with large volume and mass are likely to return to the feed port 210 of the screen drum 200 with the reversal of the spiral ring 300, or directly leave the screen drum 200 from one end of the feed port 210, so the staff needs to control the first speed and the second speed according to the actual situation.

[0034] The gap between two adjacent single rings in the spiral ring 300 is defined as a temporary groove 301. From the direction from the feed port 210 of the screen cylinder 200 toward the discharge port 220, among the two adjacent temporary grooves 301, the temporary groove 301 close to the feed port 210 is the previous level of the temporary groove 301 away from the feed port 210.

[0035] When the screen drum 200 rotates in the first direction at the first speed, the material in the screen drum 200 will approach the discharge port 220 of the screen drum 200 driven by the spiral ring 300. Among them, the material with small volume and small mass will fall into the temporary groove 301, and can approach the discharge port 220 of the screen drum 200 as the spiral ring 300 rotates. In the process of approaching the discharge port 220 of the screen drum 200, the material with small volume and small mass may pass through the sieve hole and then leave the screen drum 200. The material with large volume and large mass will fall on the adjacent single ring on the spiral ring 300, and can also approach the discharge end of the screen drum 200 as the spiral ring 300 rotates; In the process of converting the screen drum 200 from the first speed in the first direction to the second speed in the second direction, the screen drum 200 will first gradually stop rotating from the first speed, and then rotate at the second speed. During this period, the small-volume and small-mass materials in the temporary slot 301 will be pushed against and moved by the slot surface on one side of the temporary slot 301 close to the feed port 210, and the moving direction is the direction close to the discharge port 220; when the screen drum 200 is rapidly reduced from the first speed to zero, and then rapidly rotates at the second speed, at this time, the materials in the temporary slot 301 will be hit by the slot wall on the side of the temporary slot 301 close to the discharge port 220 due to inertia and can rebound in the direction of the feed port 210, and the small-volume and small-mass materials can be rebounded to the previous temporary slot 301 or more temporary slots 301 of the temporary slot 301. When the screen drum 200 is changed to rotate at the second speed in the second direction, driven by the second speed, the material with small volume and small mass in the temporary groove 301 will press against the inner wall of the screen drum 200 (the bottom of the temporary groove 301) due to the centrifugal force and rotate with the screen drum 200; When the screen drum 200 rotates at the second speed in the second direction, the waste materials with smaller volume and mass will gradually rotate from the bottom end of the screen drum 200 to the top end of the screen drum 200. During this process, the waste materials with smaller volume and mass may be thrown out from the corresponding temporary slot 301 (such as Figure 6 and Figure 7 As shown). The direction of throwing out the small-volume and small-mass waste materials will be toward the previous level or multiple levels of the temporary slot 301 where the waste materials are located. After the small-volume and small-mass waste materials fall into the previous level temporary slot 301 or the previous multiple levels of temporary slots 301 where the waste materials are originally located, they will continue to rotate with the screen drum 200 and will be thrown out again in the process of approaching the top of the screen drum 200. This cycle allows the small-volume and small-mass waste materials to gradually approach the feed port 210 of the screen drum 200 when the screen drum 200 rotates in the second direction at the second speed.

[0036] Of course, if the second speed is too large, the material with small volume and small mass may be pressed against the inner wall of the screen drum 200 and rotate with the screen drum 200. At this time, the material with small volume and small mass may not be thrown out, but will definitely be thrown out in the process of gradually decreasing the second speed, and the throwing direction will still be close to the feed port 210.

[0037] At the same time, after the first speed drops to zero, the screen drum 200 can quickly rotate at the second speed. Therefore, the large-volume and heavy-mass materials will slip between the spiral ring 300 due to inertia, and will not move in the direction parallel to the axis of the screen drum 200.

[0038] When the screen drum 200 is in the process of converting from the second speed in the second direction to the first speed in the first direction, the second speed is first decelerated to zero and then rapidly accelerated to the first speed.

[0039] During the time period when the second speed is decelerated to zero, the material with small volume and small mass will slide in the corresponding temporary groove 301 due to the sudden decrease of centrifugal force. During the sliding process, since the winding direction of the spiral ring 300 ring surface is the same as the second direction, the material with small volume and small mass will gradually approach the feed end of the screen drum 200 when sliding in the temporary groove 301, and then may be separated from the screen drum 200 from the feed end of the screen drum 200, and the material with small volume and small mass may also be separated from the screen drum 200 from the sieve hole during the sliding process. Of course, during this period, some materials will gradually approach the top of the screen drum 200 as the screen drum 200 rotates, and will be thrown out in the process of approaching the top of the screen drum 200, and the throwing direction is still in the direction of the feed port 210 of the screen drum 200. It can be known that during the time period when the screen drum 200 is decelerated from the second speed to zero, the material with small volume and small mass will move toward the feed port 210 of the screen drum 200.

[0040] Materials with large volume and mass will move toward the side close to the feed port 210 due to the reduced speed. However, since the second speed drops to zero and then quickly increases to the first speed, the distance that the materials with large volume and mass move toward the feed port 210 is very short and can be ignored, which is within the error range allowed by the present invention.

[0041] When the screen drum 200 rotates at the first speed again, the small-volume and small-mass materials will gradually leave the screen drum 200 from the screen holes while moving toward the discharge port 220. The large-volume and large-mass materials will continue to move toward the discharge port 220. After that, the screen drum 200 will decelerate to zero and quickly accelerate to the second speed and thereafter. The movement of the materials in the screen drum 200 is similar to the above-mentioned situation, which will not be described in detail here.

[0042] In summary, in this embodiment, when the screen drum 200 rotates in the first direction at the first speed, the small-volume and small-mass materials can directly pass through the screen holes, and the small-volume and small-mass materials that have not escaped from the screen holes will approach the feed port 210 when the screen drum 200 changes from the first speed to the second speed. When the screen drum 200 rotates at the second speed, the small-volume and small-mass materials will adhere to the inner wall of the screen drum 200 due to the centrifugal force, and will be thrown to the side close to the feed port 210 when approaching the top of the screen drum 200. When the screen drum 200 changes from the second speed to the second speed, the small-volume and small-mass materials will adhere to the inner wall of the screen drum 200 due to the centrifugal force, and will be thrown to the side close to the feed port 210 when approaching the top of the screen drum 200. During a speed change, materials with small volume and small mass may not only be thrown to the side close to the feed port 210, but also slide in the corresponding temporary groove 301. During the sliding process, the materials may pass through the sieve holes and may also be relatively displaced with the spiral ring 300, so that they can be closer to the feed port 210, and may be separated from the sieve drum 200 from the feed port 210 of the sieve drum 200; when the sieve drum 200 rotates at the first speed again, the materials with small volume and small mass that have not separated from the sieve drum 200 will undergo the above cycle again until they separate from the sieve drum 200.

[0043] When the screen drum 200 rotates at the first speed, the material with large volume and large mass can move toward the discharge port 220. When the screen drum 200 is changing from the first speed to the second speed, the material with large volume and large mass continues to move toward the discharge port 220. When the screen drum 200 rotates at the second speed, the material with large volume and large mass will slip on the spiral ring 300 due to inertia and will not move in the axial direction of the screen drum 200. When the screen drum 200 is changing from the second speed to the first speed, the material with large volume and large mass will move a distance toward the nearby feed port 210, but the distance is very small and can be ignored. Ignoring the distance is within the allowable error range of the present invention. When the screen drum 200 rotates at the first speed again, the material with large volume and large mass continues to move toward the discharge port 220 driven by the spiral ring 300. The above cycle is repeated until the material with large volume and large mass separates from the screen drum 200 at the discharge port 220.

[0044] Of course, in the actual application of the present invention, there will always be some small-volume and small-mass materials that cannot escape from the feed port 210 of the screen drum 200 or the screen holes of the screen drum 200. It can be foreseen that there are not many such materials. This situation is normal and is within the allowable error range in this field.

[0045] The operating principle of this embodiment is: After the waste material is put into the screen drum 200 from the feed port 210, the driving member 400 drives the screen drum 200 to rotate. When the screen drum 200 rotates in the first direction, the material can move from the feed port 210 of the screen drum 200 to the discharge port 220, and during the movement of the material, some small-volume and small-mass materials can be separated from the screen drum 200 from the screen hole. When the screen drum 200 rotates in the second direction, due to the high speed, the large-volume and heavy-mass materials may slip between the spiral ring 300, thereby causing the large-volume and heavy-mass materials to move a very small distance in the screen drum 200 or even not move at all; The small-volume and small-mass material may be temporarily attached to the inner wall of the screen drum 200 due to centrifugal force, and in the process of approaching the top of the screen drum 200, the small-volume and small-mass material may be separated from the inner wall of the screen drum 200 due to the influence of gravity. The material temporarily separated from the screen drum 200 may fall into the previous stage or the previous multiple stages of temporary slots 301 of the temporary slot 301 where it was originally located, and gradually approach the feed port 210; Therefore, when the screen drum 200 circulates in the first direction and the second direction, materials with large volume and mass can be separated from the screen drum 200 from the discharge port 220, while materials with small volume and mass can be separated from the screen drum 200 from the screen hole or the feed port 210, thereby achieving the screening of waste materials of different sizes and masses. The screened waste materials can be handed over to the corresponding equipment / device for processing, which can reduce the adverse effects of the mixture of hazardous wastes on the environment and human health. For specific details, please refer to the above content.

[0046] The technical solution of this embodiment is simple and effective, and can screen materials of different masses and volumes mixed together.

[0047] In some embodiments, the supporting rotating assembly 110 includes a rotating shaft 111 disposed on a frame and a supporting wheel 112 installed on the rotating shaft 111 . The screen drum 200 is placed on the supporting wheel 112 , and the screen drum 200 can rotate along with the rotating shaft 111 .

[0048] Specifically, the rotating shaft 111 can be a long axis parallel to the axial direction of the screen drum 200. The rotating shaft 111 is rotatably arranged on the mounting frame 100 through a bearing and is arranged on both sides of the screen drum 200. The rotating shafts 111 on both sides of the screen drum 200 are symmetrical with respect to the central axis of the screen drum 200.

[0049] The support wheel 112 is a wheel body fixed on the rotating shaft 111. The support wheel 112 rotates synchronously with the rotating shaft 111. The support wheel 112 can be a pulley, a rubber wheel, a gear or other wheel body. Two support wheels 112 can be provided on each rotating shaft 111, and both support wheels 112 are in conflict with the screen drum 200 on the corresponding side. The four support wheels 112 on the two rotating shafts 111 are in conflict with the screen drum 200, and can support the screen drum 200. The support wheels 112 located on both sides of the screen drum 200 can provide more stable support for the screen drum 200.

[0050] Furthermore, an abutment ring 230 is provided between the support wheel 112 and the screen drum 200. The abutment ring 230 is fixed to one end of the feed port 210 of the screen drum 200, and the abutment ring 230 is coaxially arranged with the screen drum 200. The outer annular surface of the abutment ring 230 abuts against the wheel surface of the support wheel 112.

[0051] The outer ring surface of the abutment ring 230 can be a surface with a large friction coefficient such as a frosted surface or a rubber surface, and the wheel surface of the support wheel 112 can be provided with anti-slip parts such as anti-slip grooves and anti-slip grooves. When the support wheel 112 rotates, it can drive the abutment ring 230 to rotate.

[0052] In addition, the abutment ring 230 can also be a ring gear, and the support wheel 112 can be a gear meshing with the ring gear. When the abutment ring 230 is a ring gear and the support wheel 112 is a gear, there is no need to worry about slipping between the abutment ring 230 and the support wheel 112, which can make the screen drum 200 rotate more stably and avoid the screen drum 200 being unable to rotate stably due to slipping between the support wheel 112 and the abutment wheel, thereby affecting material screening.

[0053] In some embodiments, the mounting frame 100 is further provided with a side baffle 120, and two side baffles 120 are provided, and the two side baffles 120 are respectively located on both sides of the screen drum 200, and can form a structure similar to an inverted eight. The inverted eight-shaped structure can block the hazardous materials coming out of the screen holes, prevent the hazardous materials coming out of the screen holes from splashing randomly, and avoid polluting the environment and endangering personal safety / health.

[0054] In some embodiments, the driving member 400 may be a driving motor, the output shaft of the driving motor is fixedly connected to the rotating shaft 111 , and the driving motor can drive the rotating shaft 111 to rotate.

[0055] Specifically, the driving motor can be mounted on the mounting frame 100 via a fixing plate, and the driving motor can be a servo motor, a stepping motor, or other motor whose rotation speed can be easily controlled.

[0056] In other embodiments, a feed cylinder 130 may be provided on the mounting frame 100 , and the feed cylinder 130 is arranged on one side of the feed port 210 of the screen cylinder 200 . One end of the feed cylinder 130 extends into the feed port 210 of the screen cylinder 200 and can release materials into the screen cylinder 200 .

[0057] A fixing rod that can extend to the mouth of the sieve drum 200 is fixed to the side of the mounting frame 100 close to the feed port 210 of the sieve drum 200. Multiple fixing rods can be provided, and the same feed drum 130 is installed on multiple fixing rods. The provision of the feed drum 130 greatly facilitates the staff to feed materials into the sieve drum 200.

[0058] In some embodiments, the present invention also includes a stirring mechanism 500, which includes a stirring shaft 510, a stirring blade 520 and a stirring member 530. The stirring shaft 510 is rotatably arranged on the mounting frame 100 through a vertical rod. The stirring shaft 510 is parallel to the axial direction of the screen cylinder 200. One end of the stirring shaft 510 is inserted into the screen cylinder 200. The stirring blade 520 is arranged on the stirring shaft 510 and is located in the screen cylinder 200. The stirring member 530 is arranged on the mounting frame 100. The stirring member 530 can drive the stirring shaft 510 to rotate. The stirring blade 520 can impact and crush the material falling on its blade.

[0059] Specifically, the vertical rod can be a straight bar, which is fixed on the mounting frame 100 and is located on one side of the discharge port 220 of the screen drum 200. The length direction of the vertical rod can be perpendicular to the length direction of the screen drum 200, and the axial center axis of the screen drum 200 can pass through the vertical rod. One end of the stirring shaft 510 is rotatably connected to the vertical rod through a bearing, and the other end of the stirring shaft 510 extends into the screen drum 200 and can be rotatably connected to the feed drum 130 through a bearing. Of course, the other end of the stirring shaft 510 can also be rotatably connected to any mounting plate or fixed block at the feed port 210 of the screen drum 200. The stirring shaft 510 is parallel to the axial direction of the screen drum 200 in the screen drum 200. The stirring blade 520 can impact and crush the waste materials falling on its blade surface, and the impacted and crushed waste materials can be thrown to the inner wall of the screen drum 200 by the stirring blade 520. The stirring blades 520 may be a plurality of plates fixed on the stirring shaft 510, and the plurality of plates fixed on the stirring shaft 510 may be distributed along a curve or along a straight line on the stirring shaft 510, which is not specifically limited here. The stirring member 530 may be a motor disposed on the mounting frame 100 or other mechanism or device capable of driving the stirring shaft 510 to rotate.

[0060] In this embodiment, when processing some materials with small mass and large volume, such materials cannot pass through the sieve holes, and the screen drum 200 may also abut against two adjacent single rings of the spiral ring 300 due to centrifugal force when rotating at the second speed in the second direction, and can rotate with the screen drum 200. During the rotation of the screen drum 200, the materials with small mass and large volume may detach from the inner ring surface of the spiral ring 300, and the detached materials may fall on the stirring blades 520; and when the screen drum 200 is converted from the second speed to the first speed, such materials will also fall from the inner ring surface of the spiral ring 300, and such materials may also fall on the stirring blades 520 after falling. The stirring shaft 510 rotates under the drive of the stirring member 530, and then drives the stirring blades 520 to rotate. The stirring blades 520 can impact and crush the materials falling thereon when rotating. After being impacted and crushed, the materials will be dispersed into materials with small mass and small volume. At this time, they can be processed according to the processing method of the materials with small mass and small volume in the aforementioned embodiment, and finally they can be separated from the screen cylinder 200 from the screen hole or the feed port 210.

[0061] Furthermore, the axial center axis of the stirring shaft 510 is located directly below the axial center axis of the screen drum 200. The setting of the stirring shaft 510 deviating from the axial center axis of the screen drum 200 makes the stirring blade 520 farther away from the upper arc surface of the screen drum 200. When the stirring blade 520 rotates at the same rotation speed, when the material farther away from the stirring blade 520 falls on the blade surface of the stirring blade 520, the impact force is greater, so that the material with small mass and large volume can be impacted into smaller pieces, which makes it easier for the material to be separated from the screen drum 200.

[0062] In some embodiments, the stirring member 530 includes a stirring motor 531, a rotating wheel 532 and a driving belt 533. The stirring motor 531 is mounted on the mounting frame 100 and is located on one side of the discharge port 220 of the sieve drum 200. A stirring wheel is mounted on the output shaft of the stirring motor 531. The rotating wheel 532 is mounted on the end of the stirring shaft 510 that is not inserted into the sieve drum 200. The driving belt 533 is sleeved on the stirring wheel and the rotating wheel 532, and the belt surface of the driving belt 533 can be tightly pressed against the wheel surface of the stirring wheel and the rotating wheel 532. The stirring motor 531 can drive the stirring wheel to rotate, and the stirring wheel drives the rotating wheel 532 to rotate through the driving belt 533. The rotating wheel 532 can drive the stirring shaft 510 to rotate, thereby realizing the rotation of the stirring blade 520 in the sieve drum 200.

[0063] Of course, the stirring motor 531 can also be other devices that can provide driving force for the stirring shaft 510, such as an internal combustion engine. The rotating wheel 532 and the stirring wheel can also be workpieces such as sprockets and gears. The corresponding drive belt 533 can be a chain and a transmission belt with teeth on the inner wall.

[0064] In some embodiments, the side of the spiral ring 300 facing the discharge port 220 is a slope 600 , and the material hit by the stirring blades 520 and thrown toward the inner wall of the screen drum 200 will hit the slope 600 and can rebound toward one side of the discharge port 220 .

[0065] When handling hazardous waste materials, it is inevitable that there will be some materials with large mass and small volume. When adding waste materials into the screen drum 200, the materials with large mass and small volume will enter the gap between two adjacent single rings on the spiral ring 300, that is, the temporary groove 301. When the screen drum 200 rotates at the first speed, the materials with large mass and small volume are pushed by the annular surface of the spiral ring 300 to move toward the discharge port 220 of the screen drum 200, just like the materials with small mass and small volume. When the screen drum 200 rotates at the second speed, the materials with large mass and small volume may not be attached to the inner wall of the screen drum 200 due to their large mass, but are thrown out along with the rotation of the screen drum 200, and the timing of throwing them out can only be in the process of approaching from the bottom to the top of the point on the screen drum 200 close to the bottom of the screen drum 200. At the same time, the materials with large mass and small volume may also pass through the screen holes when sliding along the temporary groove 301. The material thrown out of the temporary groove 301 will fall on the blade surface of the stirring blade 520, and rebound toward the inner wall of the screen drum 200 after being hit by the stirring blade 520. Since the material has a large mass and a small volume, it can rebound farther after being hit by the stirring blade 520. The material that rebounds farther will hit the inner wall of the screen drum 200 (the bottom of the temporary groove 301) or the inclined surface 600 of the spiral ring 300. The material rebounded onto the inclined surface 600 of the spiral ring 300 approaches the discharge port 220 of the screen drum 200 under the rebound of the inclined surface 600, and can eventually be separated from the screen drum 200 from the discharge port 220.

[0066] The large mass and small volume material rebounded onto the inner wall of the screen drum 200 will slide along the temporary groove 301, and the material may be thrown to the stirring blade 520 again during the sliding process, and the cycle will be repeated until the screen drum 200 changes the rotation direction and rotation speed. Since the rotation of the screen drum 200 is also a cycle, the large mass and small volume material will gradually leave the screen drum 200, and the large mass and small volume material can be screened.

[0067] The inclined surface 600 is arranged on the spiral ring 300, which can accelerate the screening of materials with large mass and small volume. The materials rebounded by the inclined surface 600 can quickly move toward the discharge port 220 of the screen drum 200. Compared with the materials directly hitting the wall of the screen drum 200, the materials stay in the screen drum 200 for a shorter time, and the number of times the materials can collide with the screen drum 200 will also be less, which can reduce the damage to the screen drum 200 caused by materials with large mass and small volume when the device is running for a long time.

[0068] In summary, the present invention can perform more detailed screening of hazardous wastes, and can screen out materials with large mass and large volume, small mass and small volume, large mass and small volume, and small mass and large volume in the waste materials. After the screened hazardous wastes are treated accordingly by other external equipment, the impact on the environment and human health can be reduced.

[0069] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hazardous waste screening device, characterized in that: include: A mounting frame (100), wherein a supporting rotating assembly (110) is arranged on the mounting frame (100); a sieve drum (200), the sieve drum (200) being rotatably arranged on the mounting frame (100) via the supporting rotating assembly (110), the sieve drum (200) comprising a feed port (210) and a discharge port (220), the feed port (210) being used to receive materials, and the discharge port (220) being used to discharge materials; A driving member (400), wherein the driving member (400) is disposed on the mounting frame (100), and the driving member (400) is capable of driving the screen drum (200) to cyclically rotate in a first direction and a second direction; a spiral ring (300), wherein the spiral ring (300) is coaxially arranged in the screen drum (200), and when the screen drum (200) rotates in the first direction, the spiral ring (300) can push the material to move from the feed port (210) toward the discharge port (220); Wherein, the rotation speed of the screen drum (200) in the first direction is lower than the rotation speed in the second direction.

2. A hazardous waste screening device according to claim 1, characterized in that: The supporting rotating assembly (110) comprises a rotating shaft (111) arranged on the frame and a supporting wheel (112) mounted on the rotating shaft (111); the screen drum (200) is placed on the supporting wheel (112), and the screen drum (200) can rotate along with the rotating shaft (111).

3. A hazardous waste screening device according to claim 2, characterized in that: An abutment ring (230) is provided between the support wheel (112) and the screen drum (200), the abutment ring (230) being fixed to one end of the screen drum (200), and the outer annular surface of the abutment ring (230) abuts against the wheel surface of the driving wheel.

4. A hazardous waste screening device according to claim 2 or 3, characterized in that: The driving member (400) is a driving motor, the output shaft of the driving motor is fixedly connected to the rotating shaft (111), and the driving motor can drive the rotating shaft (111) to rotate.

5. A hazardous waste screening device according to claim 4, characterized in that: A feed cylinder (130) is provided on the mounting frame (100), and the feed cylinder (130) is arranged on one side of the feed port (210) of the sieve cylinder (200). One end of the feed cylinder (130) extends into the feed port (210) of the sieve cylinder (200) and is capable of releasing material into the sieve cylinder (200).

6. A hazardous waste screening device according to any one of claims 1 to 3, characterized in that: The mounting frame (100) is provided with side baffles (120), the side baffles (120) are respectively located on both sides of the screen cylinder (200), and the side baffles (120) are used to resist materials screened out from the cylinder wall of the screen cylinder (200).

7. A hazardous waste screening device according to claim 1, characterized in that: The invention comprises a stirring mechanism (500), wherein the stirring mechanism (500) comprises a stirring shaft (510), a stirring blade (520) and a stirring member (530); the stirring shaft (510) is rotatably arranged on the mounting frame (100) through a vertical rod; the stirring shaft (510) is parallel to the axial direction of the sieve drum (200); one end of the stirring shaft (510) is inserted into the sieve drum (200); the stirring blade (520) is arranged on the stirring shaft (510) and is located in the sieve drum (200); the stirring member (530) is arranged on the frame; the stirring member (530) drives the stirring shaft (510) to rotate; and the stirring blade (520) can impact and crush materials that fall onto its blade.

8. A hazardous waste screening device according to claim 7, characterized in that: The axial center axis of the stirring shaft (510) is located directly below the axial center axis of the sieve drum (200).

9. A hazardous waste screening device according to claim 7 or 8, characterized in that: The stirring member (530) comprises a stirring motor (531), a rotating wheel (532) and a driving belt (533); the stirring motor (531) is mounted on the mounting frame (100); a stirring wheel is arranged on the output shaft of the stirring motor (531); the rotating wheel (532) is arranged at an end of the stirring shaft (510) that is not inserted into the sieve drum (200); the driving belt (533) is sleeved on the stirring wheel and the rotating wheel (532); and the stirring motor (531) can drive the rotating wheel (532) to rotate via the driving belt (533).

10. A hazardous waste screening device according to claim 9, characterized in that: The side of the spiral ring (300) facing the discharge port (220) is an inclined surface (600).

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