Polluted soil and construction waste mixing and conveying device

Abstract

The invention relates to the technical field of contaminated soil and construction waste treatment, in particular to a contaminated soil and construction waste mixing and conveying device which comprises a conveying mechanism, a driving unit, a cleaning unit and a scattering part. In the process of conveying a mixture, the mixture is heated and dried through external heating equipment, the inner surface of the screening roller is scraped and cleaned in real time through a scraping plate, contaminated soil is prevented from blocking the screening roller, meanwhile, the contaminated soil is scattered through a scattering part, the retention time of the contaminated soil in the area on the left side of the variable-pitch spiral plate is prolonged, and the screening efficiency is improved. The drying effect of the polluted soil is improved, and the screening and discharging efficiency and effect of the polluted soil are improved; by means of the characteristics that the pitch of the left side of the variable-pitch spiral plate is small and the pitch of the right side of the variable-pitch spiral plate is large, a mixture in the conveying process is gathered in a spiral pitch area with the small pitch of the left side of the variable-pitch spiral plate, and then it is ensured that the mixture is fully dried and scattered by family members in the area.

Description

Technical Field

[0001] The invention relates to the technical field of contaminated soil and construction waste treatment, and in particular to a contaminated soil and construction waste mixed conveying device. Background Art

[0002] The mixture of contaminated soil and construction waste mainly refers to the mixture of construction waste and contaminated soil generated during the demolition, construction or land reclamation process. The contaminated soil contains heavy metals, petroleum hydrocarbons, polycyclic aromatic hydrocarbons, residual pesticides, etc., while construction waste mainly includes concrete, bricks, mortar, metal, wood and other materials.

[0003] After being recycled, the mixture of contaminated soil and construction waste will be transported to a processing plant for recycling and reuse. Since the contaminated soil can be used in cement production after recycling, the contaminated soil needs to be screened and recycled during the transportation process. At present, when recycling contaminated soil, the existing screening drum is mainly used to screen the mixture, so as to screen out the contaminated soil and collect it.

[0004] However, due to the high water content of the contaminated soil, the following problems may occur during the transportation of the mixture: during screening, the contaminated soil is easy to adhere to the screening drum, which will not only make it difficult to unload the material, but also easily cause the screening drum to be blocked, making it difficult for the entire equipment to operate normally or efficiently; at the same time, after the contaminated soil is screened, it is easy to aggregate into blocks (or clumps) due to its high water content, so that when the contaminated soil is subsequently used to prepare cement, it is difficult to fully mix the contaminated soil with other materials, which affects the quality of the final product. Summary of the invention

[0005] Based on this, it is necessary to provide a mixed conveying device for contaminated soil and construction waste, aiming to solve the problems of the above-mentioned prior art.

[0006] The present invention provides a mixed conveying device for contaminated soil and construction waste, comprising a frame, on which a receiving seat and a screening drum rotatably arranged are installed, and a conveying mechanism for assisting in screening out the contaminated soil during the conveying process of the mixture is jointly arranged between the receiving seat and the screening drum.

[0007] The receiving seat is provided with a driving unit for driving the screening drum to rotate and driving the conveying mechanism to convey the mixture.

[0008] The conveying mechanism includes a variable pitch spiral plate fixedly arranged in the screening drum to guide the mixture to move from left to right and screen out the contaminated soil in the mixture, the pitch of the variable pitch spiral plate gradually increases from left to right, and a mounting column coaxial with the screening drum is rotatably arranged on the receiving seat through a U-shaped frame, and a cleaning unit for cleaning the screening drum is arranged on the mounting column.

[0009] The cleaning unit includes a plurality of rotating frames fixedly sleeved on the mounting posts and arranged from left to right. A rotating plate is slidably arranged on the rotating frame along the radial direction of the screening drum. The rotating plate is located in the spiral pitch of the variable-pitch spiral plate, and a scraping plate is arranged on the front side of the rotating plate.

[0010] The cleaning unit further includes a dispersing part arranged on the rotating plate and used for dispersing the contaminated soil in a swinging manner. The dispersing part assists the contaminated soil to be discharged from the screening drum.

[0011] According to a preferred embodiment, the dispersing part includes swinging bars. A plurality of swinging bars arranged at equal intervals from left to right are hinged to the rear end face of the rotating plate, and dispersing pieces are fixedly arranged on the lower end faces of the swinging bars.

[0012] According to a preferred embodiment, a connecting frame is slidably arranged along the radial direction of the screening drum below the rotating frame. A receiving groove is formed on the upper end face of the rotating plate. The lower end of the connecting frame slides left and right in the receiving groove, and a reset spring is fixedly arranged between the connecting frame and the inner side wall of the receiving groove.

[0013] According to a preferred embodiment, the scraping plate is slidably arranged on the rotating plate through a sliding block, and a pressing spring is fixedly arranged between the sliding block and the rotating plate.

[0014] According to a preferred embodiment, the driving unit includes a transverse moving plate. The transverse moving plate is slidably arranged left and right on the rotating plate and penetrates through the rotating plate. Frame-shaped grooves corresponding to the swinging bars one by one are formed on the transverse moving plate. Matching bars penetrating through the rotating plate to the inside of the frame-shaped grooves are fixedly arranged on the swinging bars, and the transverse moving plate is fixedly connected to the connecting frame.

[0015] According to a preferred embodiment, a frame-shaped frame is fixedly arranged between the front and rear sides of the connecting frame. A horizontal rod with an axis parallel to the axis of the mounting post is fixedly arranged between all the frame-shaped frames. Symmetrically left and right mounting frames are fixedly sleeved on the mounting post. The mounting frames are parallel to the rotating frames and located above the rotating frames. A cleaning top cone is fixedly arranged on the lower end face of the rotating plate.

[0016] According to a preferred embodiment, the driving unit further includes a movable convex block. A semi-circular movable convex block is slidably arranged along the radial direction of the screening drum on the upper end face of the mounting frame. An extrusion spring is fixedly arranged between the movable convex block and the mounting frame. Fixed rings corresponding to the mounting frames one by one are fixedly arranged on the inner surface of the screening drum. A plurality of circumferentially distributed and semi-circular fixed convex blocks are fixedly arranged on the inner ring surface of the fixed ring. The horizontal rod is fixedly connected to the movable convex block through a connecting piece.

[0017] According to an advantageous embodiment, the driving unit further includes a driving shaft. A driving shaft located outside the screening drum is rotatably arranged on two U-shaped frames. Gear sleeves are fixedly sleeved at both ends of the driving shaft. A belt drive is provided between the mounting post and the driving shaft. Two outer toothed rings distributed left and right are fixedly sleeved on the outer ring surface of the screening drum, and the outer toothed rings are meshed with the adjacent gears.

[0018] According to an advantageous embodiment, a mounting rod with an axis extending from left to right is rotatably arranged on the front side of the frame. Two brackets distributed left and right are fixedly sleeved on the mounting rod. A cleaning brush roller is fixedly arranged on the two brackets together. A scroll spring is fixedly arranged between the mounting rod and the frame together.

[0019] In summary, the present invention includes at least one of the following beneficial effects:

[0020] First, during the process of conveying the mixture, the mixture is heated and dried by an external heating device, and the inner surface of the screening drum is scraped and cleaned in real time by a scraper, so as to avoid the pollution soil from blocking the screening drum. At the same time, the pollution soil is dispersed by the dispersing part, the residence time of the pollution soil in the left area of the variable pitch spiral plate is prolonged, the drying effect of the pollution soil is improved, and the screening and discharging efficiency and effect of the pollution soil are improved.

[0021] Second, during the relative movement of the transverse moving plate, the matching strip drives the swinging strip and the dispersing piece to swing horizontally to stir and disperse the pollution soil in real time. On the one hand, the heating and drying effect of the pollution soil is improved. On the other hand, the dried pollution soil can be prevented from blocking the screening drum, the feeding problem is assisted to be solved, and the screened pollution soil is prevented from forming blocks and affecting the subsequent mixing effect with other materials.

[0022] Third, due to the characteristics that the left pitch of the variable pitch spiral plate is small and the right pitch is large, the mixture in the conveying process gathers in the spiral pitch area with a small left pitch of the variable pitch spiral plate, so as to ensure that the mixture receives sufficient heating, drying and dispersion in this area. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0024] Figure 1 A three-dimensional schematic diagram of the present invention is shown.

[0025] Figure 2 A partial structural schematic diagram of the present invention is shown.

[0026] Figure 3A cross-sectional view showing a partial structure of the present invention.

[0027] Figure 4 A schematic structural view showing the receiving seat of the present invention.

[0028] Figure 5 A schematic structural view showing the variable pitch spiral plate, drive shaft and mounting post of the present invention.

[0029] Figure 6 A partial cross-sectional view showing the screening drum, mounting post and fixing bump of the present invention.

[0030] Figure 7 A front view showing the mounting post, rotating plate and cleaning top cone of the present invention.

[0031] Figure 8 A schematic structural view showing the screening drum, mounting post and dispersing part of the present invention.

[0032] Figure 9 A schematic structural view showing the rotating plate, scraping plate and swinging bar of the present invention.

[0033] Figure 10 Shows Figure 9 An enlarged view of part A in

[0034] Among them, the above-mentioned drawings include the following reference numerals:

[0035] 1, frame; 10, receiving seat; 11, screening drum; 12, screening holes; 13, discharge chute; 2, conveying mechanism; 20, variable pitch spiral plate; 21, mounting post; 22, cleaning unit; 220, rotating frame; 221, rotating plate; 222, scraping plate; 223, connecting frame; 224, return spring; 225, pressing spring; 226, seal; 23, frame-shaped frame; 230, horizontal rod; 231, mounting frame; 232, movable bump; 233, compression spring; 234, fixing bump; 235, cleaning top cone; 24, dispersing part; 240, swinging bar; 241, dispersing piece; 25, mounting rod; 250, bracket; 251, cleaning brush roller; 252, volute spring; 3, driving unit; 30, transverse moving plate; 300, frame-shaped groove; 301, mating strip; 31, drive shaft; 310, external toothed ring; 311, gear. Detailed implementation manners

[0036] To make the above objects, features and advantages of the present invention more obvious and understandable, the following is combined with Figure 1

[0037] The accompanying drawings illustrate the specific embodiments of the present invention in detail. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0038] As Figure 1 , Figure 3 and Figure 4 shown, a contaminated soil and construction waste mixed conveying device includes a frame 1. A receiving seat 10 is welded and installed on the frame 1. A screening drum 11 is rotatably provided on the receiving seat 10. The screening drum 11 can be set to an inclined or horizontal state according to actual conveying requirements. A plurality of screening holes 12 for screening the mixture are provided on the screening drum 11. In order to guide and collect the required contaminated soil, a discharge chute 13 for guiding the contaminated soil to fall out is provided on the receiving seat 10. The discharge chute 13 is an inverted isosceles trapezoid structure from top to bottom, and the discharge chute 13 is located directly below the screening drum 11. A conveying mechanism 2 for assisting in screening out the contaminated soil in the mixture during the conveying process is jointly provided between the receiving seat 10 and the screening drum 11.

[0039] As Figure 1 shown, a driving unit 3 for driving the screening drum 11 to rotate and driving the conveying mechanism 2 to convey the mixture is provided on the receiving seat 10.

[0040] As Figure 1 , Figure 2 , Figure 3 and Figure 5 shown, the conveying mechanism 2 includes a variable pitch spiral plate 20. A variable pitch spiral plate 20 for guiding the mixture to move from left to right and screening out the contaminated soil in the mixture is fixedly provided inside the screening drum 11. The pitch of the variable pitch spiral plate 20 gradually increases from left to right. Due to the characteristic that the pitch on the left side of the variable pitch spiral plate 20 is small and the pitch on the right side is large, during the process of conveying the mixture, the mixture accumulates in the spiral pitch area with a small pitch on the left side of the variable pitch spiral plate 20. That is, the small pitch section of the variable pitch spiral plate 20 has the function of guiding the mixture to accumulate, which is convenient for subsequent screening of the contaminated soil. Secondly, it enhances the conveying thrust of the mixture. Two symmetrically arranged U-shaped frames on the receiving seat 10 rotatably support an installation column 21 coaxial with the screening drum 11. A cleaning unit 22 for cleaning the screening drum 11 is provided on the installation column 21.

[0041] As Figure 1 , Figure 5 , Figure 6 and Figure 8As shown, the cleaning unit 22 includes a rotating frame 220. A plurality of rotating frames 220 arranged from left to right are fixedly sleeved on the mounting column 21. A rotating plate 221 is slidably arranged on the rotating frame 220 along the radial direction of the screening drum 11. In order to avoid the problem of the rotating plate 221 getting stuck with the variable pitch spiral plate 20 during the rotation of the mounting column 21, all the rotating plates 221 are located inside the variable pitch spiral plate 20. A scraping plate 222 is arranged on the front side of the rotating plate 221. When the driving unit 3 makes the rotating plate 221 rotate and move radially back and forth, the rotating plate 221 drives the scraping plate 222 to clean the screening drum 11.

[0042] As Figure 1 and Figure 8 shown, the cleaning unit 22 further includes a dispersing part 24 arranged on the rotating plate 221 and used to disperse the contaminated soil by swinging. The dispersing part 24 assists the contaminated soil to be discharged from the screening drum 11. It should be added that an existing external heating device (not shown in the figure) is arranged on the left section of the variable pitch spiral plate 20 to heat and dry the mixture inside this section of the variable pitch spiral plate 20, accelerating the evaporation of moisture inside it.

[0043] As Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 shown, during operation, the driving unit 3 operates to make the screening drum 11 drive the variable pitch spiral plate 20 to rotate forward synchronously. The variable pitch spiral plate 20 drives the mixture entering the screening drum 11 to move from left to right. The existing external heating device operates to heat and dry the mixture. During the rotation of the screening drum 11, the screening holes 12 on it screen the mixture. The contaminated soil in the mixture falls out through the screening holes 12. At the same time, the driving unit 3 makes the mounting column 21 drive the rotating plate 221 and the scraping plate 222 to rotate in the opposite direction. During the rotation of the scraping plate 222, it scrapes and cleans the inner surface of the screening drum 11 to prevent the contaminated soil from blocking the screening drum 11. Secondly, during the rotation of the mounting column 21, the contaminated soil is dispersed by the dispersing part 24, which is conducive to the uniform heating of the contaminated soil, improving the heating and drying efficiency and effect, and assisting the contaminated soil to be screened out from the screening drum 11. By stirring the mixture with the scraping plate 222 and the dispersing part 24, the residence time of the contaminated soil in the left area (the area with drying effect) of the variable pitch spiral plate 20 is prolonged, improving the drying effect on the contaminated soil and reducing the probability of adhesion and blockage problems caused by the high water content of the contaminated soil.

[0044] The finally screened contaminated soil falls into the discharge chute 13, and the inclined inner wall of the discharge chute 13 guides the contaminated soil to gather, facilitating the subsequent centralized collection of the contaminated soil at the lower opening of the discharge chute 13.

[0045] It should be noted that, asFigure 7 and Figure 9 As shown in Figure 9 , the scraping plate 222 is arranged on the rotating plate 221 through a sliding block and can slide up and down. A pressing spring 225 is fixedly arranged between the sliding block and the rotating plate 221. The scraping plate 222 is a right triangle with an inclined surface facing upward.

[0046] In the initial state, the pressing spring 225 is in a compressed and deformed state. During the whole - circle rotation of the rotating plate 221, the rotating plate 221 also reciprocates along the radial direction of the screening drum 11. When the rotating plate 221 moves away from the inner surface of the screening drum 11 along the radial direction of the screening drum 11, the amount of compression deformation of the pressing spring 225 decreases, but it is still in a compressed and deformed state at this time. The elastic force generated by the deformation of the pressing spring 225 makes the sliding block drive the scraping plate 222 to contact the inner surface of the screening drum 11; when the rotating plate 221 moves closer to the inner surface of the screening drum 11 along the radial direction of the screening drum 11, the compression of the pressing spring 225 intensifies. In summary, the elastic force generated by the deformation of the pressing spring 225 makes the scraping plate 222 always contact the inner surface of the screening drum 11, and the scraping plate 222 continuously scrapes and cleans the screening holes 12.

[0047] As Figure 1 、 Figure 2 and Figure 5 As shown in Figure 1 , Figure 2 and Figure 5 , the driving unit 3 includes a driving shaft 31. The two U - shaped frames are jointly rotatably provided with a driving shaft 31 located outside the screening drum 11. The driving shaft 31 is connected to an external motor (not shown in the figure). Gear 311 is fixedly sleeved at both ends of the driving shaft 31. A belt drive is provided between the mounting column 21 and the driving shaft 31. Two outer tooth rings 310 distributed left and right are fixedly sleeved on the outer ring surface of the screening drum 11, and the outer tooth rings 310 are meshed with the adjacent gears 311.

[0048] During operation, first, the external motor works to drive the gears 311 on it to rotate synchronously through the driving shaft 31. The screening drum 11 rotates forward synchronously through the meshing between the gears 311 and the corresponding outer tooth rings 310, and the driving shaft 31 makes the mounting column 21 rotate synchronously through the belt drive. The rotating directions of the screening drum 11 and the mounting column 21 are opposite. It should be noted that the method of driving the outer tooth ring 310 to rotate by using gears 311 with a large size difference is to amplify the torque so that the screening drum 11 is easy to rotate.

[0049] As Figure 8 and Figure 9 As shown in Figure 8 and Figure 9 , the dispersing part 24 includes swinging bars 240. A plurality of swinging bars 240 arranged equidistantly from left to right are hinged to the rear - side end face of the rotating plate 221. An inverted - triangle - shaped dispersing piece 241 is fixedly arranged on the lower end face of the swinging bar 240.

[0050] As Figure 1 、Figure 8 , Figure 9 and Figure 10 As shown in Figure 8 , Figure 9 , and Figure 10 , the driving unit 3 further includes a transverse movement plate 30. The transverse movement plate 30 is slidably disposed left and right on the rotating plate 221 and penetrates through the rotating plate 221. Frame-shaped grooves 300 corresponding to the swing bars 240 one by one are formed on the transverse movement plate 30. A cooperation bar 301 that penetrates through the rotating plate 221 and extends into the frame-shaped groove 300 is fixedly disposed on the swing bar 240. The transverse movement plate 30 is fixedly connected to the connecting frame 223. The distance between the left and right side walls of the cooperation bar 301 is smaller than the distance between the left and right inner side walls of the frame-shaped groove 300. It should be noted that in order to facilitate the installation of components such as the transverse movement plate 30, the connecting frame 223, and the pressing spring 225 located inside the rotating plate 221, the rotating plate 221 is set as an assembled structure and fixed by welding.

[0051] As Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown in Figure 7 , Figure 8 , Figure 9 , and Figure 10 , a connecting frame 223 is slidably disposed along the radial direction of the screening drum 11 below the rotating frame 220. A receiving groove is formed on the upper end surface of the rotating plate 221. The lower end of the connecting frame 223 is slidably disposed left and right in the receiving groove. A return spring 224 is fixedly disposed between the connecting frame 223 and the inner side wall of the receiving groove. In order to prevent the mixture from entering the receiving groove during the conveying process and protect the return spring 224, a sealing member 226 for closing the receiving groove and located above the return spring 224 is fixedly disposed between the inner wall of the receiving groove and the connecting frame 223.

[0052] During the process that the rotating plate 221 drives the swing bar 240 to rotate a full circle, the rotating plate 221 will contact the plate surface in the corresponding spiral area on the variable pitch spiral plate 20. And during the continuous full-circle rotation of the variable pitch spiral plate 20, the left and right sides of the rotating plate 221 contact the variable pitch spiral plate 20. The variable pitch spiral plate 20 will push the rotating plate 221, causing the rotating plate 221 to horizontally move along the axis of the mounting column 21. During this period, the return spring 224 synchronously undergoes an adaptive deformation, and the problem of jamming between the rotating plate 221 and the variable pitch spiral plate 20 is avoided through the adaptive deformation of the return spring 224.

[0053] During the above process, the rotating plate 221 moves horizontally relative to the rotating frame 220. Through the relative movement between the rotating plate 221 and the rotating frame 220, there is a relative movement between the transverse movement plate 30 and the rotating plate 221. The matching strip 301 and the swinging strip 240 are arranged on the rotating plate 221. Therefore, during the relative movement of the transverse movement plate 30, the left inner wall or the right inner wall of the frame-shaped groove 300 will push the corresponding matching strip 301. Through the cooperation between the frame-shaped groove 300 and the corresponding matching strip 301, the matching strip 301 drives the swinging strip 240 and the dispersing piece 241 to swing horizontally, and the swinging swinging strip 240 and the dispersing piece 241 are used to stir and disperse the contaminated soil, which can improve the drying effect of the contaminated soil on the one hand and facilitate the screening and discharge of the contaminated soil on the other hand.

[0054] As Figure 6 , Figure 7 and Figure 8 shown, a frame-shaped frame 23 is fixedly arranged between the front and rear sides of the connecting frame 223. The rotating frame 220 corresponds to the inside of the frame-shaped frame 23. A horizontal rod 230 with an axis parallel to the axis of the mounting column 21 is fixedly arranged among all the frame-shaped frames 23. Symmetrically arranged left and right mounting frames 231 are fixedly sleeved on the mounting column 21. The mounting frames 231 are parallel to the rotating frame 220 and are located above the rotating frame 220; a cleaning top cone 235 is fixedly arranged on the lower end surface of the rotating plate 221. In order to enable the cleaning top cone 235 to be inserted into the screening hole 12, the cleaning top cone 235 is made of rubber and its aperture is smaller than the aperture of the screening hole 12.

[0055] As Figure 1 , Figure 6 , Figure 7 and Figure 8 shown, the driving unit 3 further includes a movable convex block 232. A semi-circular movable convex block 232 is slidably arranged on the upper end surface of the mounting frame 231 along the radial direction of the screening drum 11. A compression spring 233 is fixedly arranged between the movable convex block 232 and the mounting frame 231. Fixed rings corresponding to the mounting frames 231 are fixedly arranged on the inner surface of the screening drum 11. The variable pitch spiral plate 20 is located between the fixed rings. A plurality of circumferentially distributed and semi-circular fixed convex blocks 234 are fixedly arranged on the inner ring surface of the fixed ring. The horizontal rod 230 is fixedly connected to the movable convex block 232 through a connecting piece.

[0056] During the process of the installation column 21 rotating for a full circle, the installation column 21 drives the mounting bracket 231 and the movable convex block 232 to rotate synchronously. The compression spring 233 is always in a compressed state, and the elastic force generated by its compression makes the movable convex block 232 always closely adhere to the inner ring surface of the fixed ring or the surface of the fixed convex block 234. When the movable convex block 232 gradually contacts the fixed convex block 234, the fixed convex block 234 squeezes the movable convex block 232, causing the movable convex block 232 to drive the horizontal rod 230 closer to the installation column 21, and the compression spring 233 is further compressed. The frame 23 and the rotating plate 221 move synchronously with the horizontal rod 230. When the movable convex block 232 abuts against the fixed convex block 234 and both are located on the same radial line of the fixed ring, at this time, the rotating plate 221 moves to the maximum displacement, and the rotating plate 221 closely adheres to the inner surface of the screening drum 11. As the mounting bracket 231 gradually rotates, the movable convex block 232 disengages from the fixed convex block 234 and the elastic force generated by the deformation of the compression spring 233 makes the movable convex block 232 contact the inner wall of the fixed ring. During this process, the rotating plate 221 approaches the installation column 21 (away from the screening drum 11). In summary, during the full-circle rotation of the mounting bracket 231 and the rotating plate 221, the rotating plate 221 also reciprocates along the length direction of the rotating frame 220.

[0057] During the period when the rotating plate 221 reciprocates along the length direction of the rotating frame 220, the rotating plate 221 drives the cleaning top cone 235 thereon to move synchronously. The cleaning top cone 235 reciprocally inserts into the screening holes 12 to clean the screening holes 12 again, avoiding the problem that the contaminated soil gets stuck in the screening holes 12 and affecting the overall conveying and screening efficiency and effect.

[0058] It should be noted that the total number of the frames 23 in the present invention is adjusted according to actual requirements. Figure 5 and Figure 6 The number of the frames 23 shown in [figures] does not represent that only these several frames 23 can be set in the present invention. However, within the left half of the screening drum 11, that is, in the spiral pitch area with a small pitch on the left side of the variable pitch spiral plate 20, several frames 23 must be provided to ensure that the contaminated soil in this area is dispersed to improve the drying efficiency and effect, and to prevent the contaminated soil in this area from blocking the screening drum 11.

[0059] As Figure 1 、 Figure 2 and Figure 3 As shown in [figures], a mounting rod 25 with an axis extending from left to right is rotatably provided on the front side of the frame 1. Two brackets 250 distributed left and right are fixedly sleeved on the mounting rod 25. A cleaning brush roller 251 is fixedly provided on the two brackets 250 together. A scroll spring 252 is fixedly provided between the mounting rod 25 and the frame 1 together.

[0060] The scroll spring 252 is always in a deformed state. The elastic force generated by the deformation of the scroll spring 252 causes the bracket 250 to always have a tendency to approach the outer surface of the screening drum 11, so that the cleaning brush roller 251 always clings to the screening drum 11. During the whole - week rotation of the screening drum 11, the cleaning brush roller 251 brushes and cleans the outer surface of the screening drum 11, enhancing the anti - clogging effect.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0062] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0063] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0064] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A mixed conveying device for contaminated soil and construction waste, comprising a frame, on which a receiving seat and a screening drum rotatably arranged are mounted, characterized in that: A conveying mechanism is provided between the receiving seat and the screening drum for assisting in screening out the contaminated soil during the conveying process of the mixture; The receiving seat is provided with a driving unit for driving the screening drum to rotate and driving the conveying mechanism to convey the mixture; The conveying mechanism includes a variable pitch spiral plate fixedly arranged in the screening drum, guiding the mixture to move from left to right and screening and discharging the contaminated soil in the mixture; a mounting column coaxial with the screening drum is rotatably arranged on the receiving seat through a U-shaped frame, and a cleaning unit for cleaning the screening drum is arranged on the mounting column; The cleaning unit comprises a plurality of rotating frames arranged from left to right and fixedly mounted on the mounting column, a rotating plate is provided on the rotating frame for radial sliding movement along the screening drum, and a scraper is provided on the front side of the rotating plate; when the driving unit causes the rotating plate to rotate and reciprocate radially, the rotating plate drives the scraper to move and clean the inner surface of the screening drum; The cleaning unit also includes a scattering part which is arranged on the rotating plate and scatters the contaminated soil by swinging, and the scattering part assists the contaminated soil to be discharged from the screening drum.

2. The device for conveying contaminated soil and construction waste mixture according to claim 1, characterized in that: The dispersing portion comprises a swing bar, a plurality of swing bars equidistantly arranged from left to right are hingedly provided on the rear end surface of the rotating plate, and a dispersing sheet is fixedly provided on the lower end surface of the swing bar.

3. The device for conveying contaminated soil and construction waste mixture according to claim 1 is characterized in that: The pitch of the variable pitch spiral plate gradually increases from left to right, and the rotating plate is located in the spiral pitch of the variable pitch spiral plate.

4. The device for conveying mixed contaminated soil and construction waste according to claim 2, characterized in that: A connecting frame is provided below the rotating frame for radial sliding along the screening drum, a receiving groove is provided on the upper end surface of the rotating plate, the lower end of the connecting frame is slidably arranged in the receiving groove, and a return spring is fixedly provided between the connecting frame and the inner side wall of the receiving groove.

5. The device for conveying contaminated soil and construction waste mixture according to claim 1, characterized in that: The scraper is slidably arranged on the rotating plate via a sliding block, and a pressure spring is fixedly arranged between the sliding block and the rotating plate.

6. The device for conveying contaminated soil and construction waste mixture according to claim 4, characterized in that: The driving unit includes a transverse plate, a rotating plate that slides left and right and is penetrated by a transverse plate, a frame-shaped groove corresponding to the swing bar is opened on the transverse plate, a matching strip that penetrates the rotating plate and is fixedly arranged on the swing bar to the frame-shaped groove, and the transverse plate is fixedly connected to the connecting frame.

7. The device for conveying contaminated soil and construction waste mixture according to claim 4, characterized in that: A frame is fixedly arranged between the front and rear sides of the connecting frame, a horizontal rod whose axis is parallel to the axis of the mounting column is fixedly arranged between all the frame frames, a left-right symmetrical mounting frame is fixedly sleeved on the mounting column, the mounting frame is parallel to the rotating frame and is located above the rotating frame, and a cleaning top cone is fixedly arranged on the lower end surface of the rotating plate.

8. The device for conveying contaminated soil and construction waste mixture according to claim 7, characterized in that: The driving unit also includes a movable protrusion, and the upper end surface of the mounting frame is provided with a semicircular movable protrusion which slides radially along the screening drum, and an extrusion spring is fixedly provided between the movable protrusion and the mounting frame, and a fixing ring corresponding to the mounting frame is fixedly provided on the inner surface of the screening drum, and a plurality of circumferentially distributed and semicircular fixed protrusions are fixedly provided on the inner ring surface of the fixing ring, and the horizontal rod is fixedly connected by the movable protrusion of the connecting piece.

9. The contaminated soil and construction waste mixed conveying device according to claim 1 is characterized by: The driving unit also includes a driving shaft. The two U-shaped frames are provided with a driving shaft located outside the screening drum and rotate together. Gears are fixedly sleeved at both ends of the driving shaft. The mounting column and the driving shaft are driven by a belt. The outer ring surface of the screening drum is fixedly sleeved with two outer toothed rings distributed on the left and right, and the outer toothed rings are meshed with adjacent gears.

10. The device for conveying mixed contaminated soil and construction waste according to claim 1, characterized in that: The front side of the frame is rotatably provided with a mounting rod with an axis extending from left to right, two brackets distributed left and right are fixedly sleeved on the mounting rod, a cleaning brush roller is fixedly provided on the two brackets, and a volute spring is fixedly provided between the mounting rod and the frame.

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