A curing soil pretreatment screening structure and method

Abstract

The present application relates to the technical field of matured soil screening, and specifically discloses a matured soil pretreatment screening structure and method; the screening structure comprises a shell, a screen, a material guide frame, a scraper assembly and a bottom sealing assembly; a supporting cylinder is rotatably installed around a vertical shaft in the shell; the screen is in a cylindrical structure with open upper and lower ends and is fixedly embedded in the supporting cylinder; the screen comprises screen segments in the form of inverted circular table side surfaces; the material guide frame is horizontally fixed in the supporting cylinder and located above the screen segments; the scraper assembly comprises a fixed frame fixed to the bottom end of the shell, a vertical rod fixed to the fixed frame, a horizontal plate hinge base, a sleeve hinge base and a plurality of scraper assemblies; the bottom sealing assembly is fixed to the fixed frame and controls the opening and closing of the lower end of the screen; the screening structure can separate and screen the just matured matured soil, can simultaneously clean the structure during the screening process, and can continuously and efficiently screen the matured soil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of matured soil screening, and specifically provides a matured soil pretreatment screening structure and method. BACKGROUND

[0002] Matured soil refers to soil that is improved by physical, chemical or biological means to eliminate defects such as hardening, salinization, pests and diseases, and nutrient imbalance existing in the original soil, so as to obtain soil that is more suitable for plant growth and has more stable fertility; matured soil is widely used in agricultural planting, horticultural seedling raising, landscaping and other scenes; through industrialized scale production, various types of commercial matured soil suitable for different types of plants and different planting purposes can be prepared; after the preparation of matured soil is completed, in order to remove impurities remaining in the matured soil, especially various impurities such as leaves, branches and stones in the matured soil prepared by using organic compost, the matured soil after maturation is usually subjected to screening treatment in order to obtain soil with uniform particles, or to be classified for different purposes; under the prior art, the matured soil is usually screened by using a vibrating screen or a drum screen, but in large-scale industrial production, the above screening equipment has the following defects.

[0003] 1. Whether it is a vibrating screen or a drum screen, the screen plate and the drum are arranged obliquely and are relatively long, so that the equipment is not compact and occupies a large space.

[0004] 2. Although the matured soil is usually subjected to spreading treatment before screening, the matured soil before screening still contains a certain humidity in order to maintain the activity of beneficial microorganisms in the matured soil; although the matured soil is not high in humidity, it is not easy to cause large-area clogging of the screen holes in a short screening time, but in actual screening, the amount of matured soil to be screened is large and the duration is long, so that the screen holes of the screen plate or the drum screen are inevitably gradually clogged, which greatly reduces the screening efficiency; usually, the equipment needs to be stopped for cleaning, and the cleaning is relatively troublesome.

[0005] 3. For the vibrating screen, the matured soil is directly placed on the screen plate during screening, so that local accumulation of the soil is inevitable; for the drum screen, the matured soil is always located near the left and right positions of the lower end of the drum in the axial direction during screening, so that the local accumulation problem is more serious, and the effective utilization rate of the screen surface of the drum screen is very low; therefore, the screening effect is affected. SUMMARY

[0006] In order to solve the above problems, the present application provides a matured soil pretreatment screening structure and method for solving the problems mentioned in the background.

[0007] In order to achieve the above object, the present application adopts the following technical scheme: A mature soil pretreatment screening structure, comprising a shell, a screen, a material guide frame, a scraper assembly and a bottom sealing assembly; a supporting cylinder is rotatably installed around a vertical shaft in the shell; the screen is in a cylindrical structure with open upper and lower ends and is fixedly embedded in the supporting cylinder; the screen comprises a screen section in an inverted circular table side structure; the material guide frame is horizontally fixed in the supporting cylinder and above the screen section to guide the mature soil to slide from a position close to the top end of the screen section; the scraper assembly comprises a fixed frame fixed at the bottom end of the shell, a vertical rod fixed on the fixed frame, a horizontal plate hinge seat, a sleeve hinge seat and a plurality of scraper assemblies; the vertical rod extends into the screen; the horizontal plate hinge seat and the sleeve hinge seat are distributed vertically in the screen and are fixed on the vertical rod; the plurality of scraper assemblies are distributed circumferentially around the vertical rod and are hingedly connected between the horizontal plate hinge seat and the sleeve hinge seat; the scraper assembly comprises a scraper made of elastic metal and tightly attached to the screen surface of the screen section; the bottom sealing assembly is fixed on the fixed frame and controls the opening and closing of the lower end of the screen; when it rises, the lower end of the screen is opened and pushes up the scraper assembly, the scraper deviates from the screen surface of the screen section around the hinge shaft of the horizontal plate hinge seat, and the scraper gradually bends; when it descends, the lower end of the screen is closed, the scraper resets and vibrates the screen for cleaning, and the elastic scraper is straightened for self-cleaning.

[0008] Preferably, the scraper assembly further comprises a head block fixed at the lower end of the scraper, the upper end of the scraper is hingedly connected to the horizontal plate hinge seat, and a spring sheet is hingedly connected between the head block and the sleeve hinge seat; under the elastic force of the spring sheet, the scraper is tightly attached to the screen surface of the screen section.

[0009] Preferably, the bottom sealing assembly comprises a bottom sealing disc slidingly installed on the vertical rod, the bottom sealing disc is located in the lower end of the screen, and the upper end of the bottom sealing disc is a conical surface; a roller is horizontally rotatably installed on the head block; when the bottom sealing disc rises, the roller rolls in contact with the conical surface of the bottom sealing disc.

[0010] Preferably, the supporting cylinder comprises a supporting part in a hollow structure and an inverted circular table shape, a plurality of flexible pad strips are circumferentially fixed on the inner side of the supporting part; the screen section is embedded in the supporting part, and the plurality of flexible pad strips are in common support contact with the outer screen surface of the screen section; a vibration block made of flexible material is fixed on the head block; under the elastic force of the spring sheet, the vibration block is in contact with the inner screen surface of the screen section.

[0011] Preferably, the material guide frame comprises a fixed ring fixed on the inner wall of the supporting cylinder, a circular ring-shaped feeding plate is horizontally fixed in the fixed ring, a conical-shaped material guide disc is fixed in the ring of the feeding plate, and a plurality of circumferentially distributed feeding windows are formed in the feeding plate.

[0012] Preferably, a center rod is vertically fixed at the top center of the material guide disc, a plurality of sawtooth plates are fixed between the center rod and the feeding plate, and the plurality of sawtooth plates are circumferentially and alternately distributed with the plurality of feeding windows; the upper edge of the sawtooth plate is provided with a sawtooth, and a gap is provided between the sawtooth plate and the material guide disc.

[0013] Preferably, the shell comprises a cylindrical bin; the supporting cylinder further comprises two upper and lower fixed parts, the fixed parts are cylindrical, and the supporting cylinder is rotatably installed in the cylindrical bin through the two fixed parts; the fixed ring is fixed in the upper fixed part.

[0014] Preferably, the shell further comprises a shunting bin; the shunting bin comprises an external bin, an internal bin and an inclined material plate; the external bin is cylindrical and fixed at the bottom end of the cylindrical bin; the internal bin is in a horn cylinder structure, the internal bin is located in the external bin, and the lower end fixed part of the supporting cylinder extends into the upper end port of the internal bin; the bottom ends of the external bin and the internal bin are provided with flush chamfered ports, the inclined material plate is fixed between the chamfered ports of the external bin and the internal bin, and the bottom end of the inclined material plate is provided with a material falling port; the fixed frame is fixed at the bottom end of the inclined material plate, and the vertical rod passes through the internal bin.

[0015] In addition, the application also provides a curing soil pretreatment screening method, comprising the following steps: S1, airing the just-cured curing soil to a semi-dry state.

[0016] S2, starting the screening structure, so that the screen mesh is in a rotating working state with the supporting cylinder.

[0017] S3, delivering and feeding the curing soil after the airing treatment to the upper side of the screen mesh.

[0018] S4, the fed curing soil is guided to fall on the screen surface of the screen mesh section for rotating and sliding screening through the material guide frame.

[0019] S5, the bottom sealing assembly intermittently opens and closes the lower end port of the screen mesh, the top touch scraper assembly performs scraper cleaning, and the scraper assembly indirectly touches the screen mesh for screen surface cleaning.

[0020] S6, collecting the screen-out material and the screen-in material obtained by screening respectively.

[0021] The above technical solution has the following advantages or beneficial effects: This invention provides a pretreatment screening structure for mature soil, which adopts a vertical screening structure layout and uses screen segments with an inverted frustum side structure for screening. The design is compact, occupies little space, and the screen segments can be used as an entire effective screening surface, avoiding local accumulation of screened material and greatly increasing the effective screening area. A guide frame arranged above the screen can guide the fed mature soil. The synchronous rotation of the guide frame with the screen disperses and rotates the mature soil, providing dispersion guidance and auxiliary crushing effects. The mature soil guided by the guide frame... Soil can rotate and slide downwards from the top of the screen section for screening, making full use of the screening surface of the screen section; the bottom sealing component can intermittently discharge the material inside the screen, and in the process of the bottom sealing component controlling the opening and closing of the lower port of the screen, it works in conjunction with the scraper component to complete the self-cleaning of the scraper and the indirect cleaning of the screen, comprehensively suppressing the clogging of the screen holes, and maintaining the high efficiency of screening without stopping the machine; in summary, the screening structure provided by the present invention can perform impurity removal and separation screening treatment on freshly matured soil, and can perform synchronous cleaning of the structure during the screening process, enabling continuous and efficient screening treatment of matured soil. Attached Figure Description

[0022] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0023] Figure 1 This is a three-dimensional structural diagram of a pre-treatment screening structure for mature soil.

[0024] Figure 2 This is a top view of a pre-treatment screening structure for mature soil.

[0025] Figure 3 yes Figure 2 Sectional view of AA.

[0026] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle.

[0027] Figure 5 It is a three-dimensional sectional view of the assembly of the support cylinder, screen, guide frame, scraper assembly and bottom sealing component.

[0028] Figure 6 It is a three-dimensional sectional view of the assembly of the screen, guide frame, scraper assembly and bottom sealing component.

[0029] Figure 7 This is a 3D structural diagram of the diversion compartment.

[0030] Figure 8 is a perspective view of the assembly of the supporting cylinder and the screen.

[0031] Figure 9 is a perspective view of the supporting cylinder.

[0032] Figure 10 is a perspective view of the material guide frame.

[0033] Figure 11 is a perspective view of the assembly of the vertical rod, the horizontal plate hinge, the sleeve hinge and the scraper assembly.

[0034] Figure 12 is a method flow chart of a method for pre-treating and screening matured soil.

[0035] In the figure: 1, outer shell; 11, cylindrical silo; 111, rotary bearing; 112, frame bearing; 12, shunt silo; 121, external silo; 122, internal silo; 123, inclined material plate; 13, supporting cylinder; 131, fixed part; 132, supporting part; 133, flexible pad strip; 14, material blocking cylinder; 2, screen; 21, fixed section; 22, screen section; 3, material guide frame; 31, fixed ring; 32, material feeding plate; 321, material feeding window; 33, material guide disc; 331, central rod; 332, shaft sleeve; 34, sawtooth plate; 4, scraper assembly; 41, fixed frame; 42, vertical rod; 43, horizontal plate hinge; 44, sleeve hinge; 45, scraper assembly; 451, end block; 452, spring sheet; 453, scraper; 454, roller; 455, vibrating block; 5, bottom sealing assembly; 51, bottom sealing disc; 511, sliding sleeve; 52, electric cylinder. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0038] As Figure 1 , Figure 3 , Figure 5 , Figure 7 , Figure 8 and Figure 9As shown in the drawings, a mature soil pretreatment screening structure includes a shell 1; the shell 1 includes a cylindrical bin 11 and a shunt bin 12, a support base for supporting the screening structure is welded and arranged on the outer wall of the cylindrical bin 11, which is not shown in the drawings; a slewing bearing 111 and a frame bearing 112 are welded in the cylindrical bin 11, and the slewing bearing 111 and the frame bearing 112 are arranged close to the upper and lower ports of the cylindrical bin 11 respectively; the frame bearing 112 is composed of a circular ring frame welded on the inner wall of the cylindrical bin 11 and a bearing welded in the center of the circular ring frame, and the bearing radius of the frame bearing 112 is smaller than the radius of the slewing bearing 111. A supporting cylinder 13 is coaxially arranged in the cylindrical bin 11, and the supporting cylinder 13 includes two fixed parts 131 and a supporting part 132; the two fixed parts 131 are both cylindrical structures and are fixed on the inner ring of the slewing bearing 111 and the bearing inner ring of the frame bearing 112 respectively, and the upper fixed part 131 is provided with an overlapping ring overlapping with the slewing bearing 111, and a material blocking cylinder 14 is welded on the overlapping ring, which is used to block the mature soil from falling to the outside of the screening structure when feeding; the supporting part 132 is in a hollow structure and in an inverted circular table shape; a plurality of flexible pad strips 133 are fixed on the inner side of the supporting part 132 and are uniformly distributed in the circumferential direction; the flexible pad strips 133 are made of rubber material, and the long edges of the flexible pad strips 133 extend along the generatrix direction of the supporting part 132; a gear ring can also be welded on the top end of the upper fixed part 131, and a motor with a gear wheel assembled on the output shaft can be fixed and arranged on the outer wall of the cylindrical bin 11, the gear wheel is engaged with the gear ring, and the supporting cylinder 13 can be driven to rotate by the motor, the above is an optional driving structure for driving the supporting cylinder 13 to rotate, and the gear ring and the motor are not shown in the drawings.

[0039] As shown in the drawings, Figure 3 , Figure 4 , Figure 5 , Figure 8 and Figure 9 , a screen 2 is embedded and arranged in the supporting cylinder 13, and the screen 2 is in a cylindrical structure with open upper and lower ports; the screen 2 is composed of three sections of a screen section 22 welded between two fixed sections 21 and the two fixed sections 21 distributed above and below, the two fixed sections 21 are both cylindrical structures, and the two fixed sections 21 are both fixed on the inner walls of the two fixed parts 131 of the supporting cylinder 13 by screws respectively; the screen section 22 is in an inverted circular table side structure; the screen section 22 is embedded in the supporting part 132, and a plurality of flexible pad strips 133 are in contact with the outer screen surface of the screen section 22; the supporting part 132 provides elastic buffer support for the screen section 22 through the flexible pad strips 133, so that in the actual screening process, the screen section 22 can also be well buffered on the basis of obtaining frame support, and the structural deformation of the screen section 22 is delayed.

[0040] In the present application, the screen 2 is embedded in the supporting cylinder 13 and rotates synchronously with the supporting cylinder 13, belonging to a vertical screening structure. Compared with the existing vibrating screen and the drum screen, the structure layout is more compact, and the occupied space is relatively small. The screen section 22 of the screen 2 is in the inverted circular table side structure, and the screen surface of the screen section 22 can be used as an effective screening surface. Compared with the drum screen, the screening area is greatly increased, and the inclined screen surface structure of the screen section 22 is not conducive to the local accumulation of the mature soil. In the process of rotating the screen 2 with the supporting cylinder 13, the mature soil is more likely to spiral down and slide on the screen surface in a dispersed manner, thereby prolonging the effective screening time. At a suitable rotating speed, the combined force of the centrifugal force formed by rotation and the gravity of the mature soil can promote the mature soil to pass through the screen hole in a way close to perpendicular to the screen surface of the screen section 22, thereby facilitating the rapid screening of the mature soil. In addition, due to the action of the gravity of the mature soil, the mature soil is inhibited to a certain extent from blocking the screen hole.

[0041] As shown in Figure 1 , Figure 3 and Figure 7 , the shunt bin 12 includes an external bin 121, an internal bin 122 and an inclined material plate 123. The external bin 121 is in a cylindrical shape and is fixed at the bottom end of the cylindrical bin 11 by bolts. The internal bin 122 is in a horn cylinder structure, and the internal bin 122 is located in the external bin 121. The large end of the internal bin 122 is arranged downward, and the lower end fixed part 131 of the supporting cylinder 13 extends into the upper port of the internal bin 122, so that the lower fixed section 21 of the screen 2 and the internal bin 122 form a port joint, and the larger particle mature soil and impurities after screening of the mature soil through the screen 2 will fall out of the internal bin 122. The bottom ends of the external bin 121 and the internal bin 122 are provided with flush chamfered ports, and the inclined material plate 123 is generally in an elliptical ring plate structure. The inclined material plate 123 is welded between the chamfered surfaces of the external bin 121 and the internal bin 122. The bottom end of the inclined material plate 123 is provided with a material falling port, which is located at the lower side of the bottom end surface of the inclined material plate 123 and is centrally arranged. To avoid the internal bin 122 from blocking the sliding of the mature soil on the inclined material plate 123, another material falling port can be selected to be arranged at the upper side of the bottom end surface of the inclined material plate 123 and is also centrally arranged. It should be noted that only the material falling port at the lower side is shown in the drawings. The uniform particle mature soil obtained by screening is mostly directly dropped on the inclined material plate 123, and a small part is dropped on the circular table surface of the internal bin 122 and slides to the inclined material plate 123. Finally, the uniform particle mature soil slides down the inclined material plate 123 and is discharged from the material falling port. The shunt bin 12 is used for shunting and discharging the screened material of the mature soil.

[0042] As shown in Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 10As shown, the horizontal fixed material guide frame 3 for guiding the mature soil to slide from the position close to the top end of the screen section 22 is fixed in the support cylinder 13, and the material guide frame 3 is located above the screen section 22; the material guide frame 3 comprises a fixed ring 31 fixed on the inner wall of the upper fixed part 131 in the support cylinder 13 by screws, a circular annular feed plate 32 is horizontally welded in the fixed ring 31, a conical material guide disc 33 is welded in the ring of the feed plate 32, a plurality of circumferentially uniformly distributed feed windows 321 are formed in the feed plate 32, and the feed windows 321 are in the form of fan rings. The top center of the material guide disc 33 is vertically welded with a center rod 331, and a plurality of sawtooth plates 34 are welded between the center rod 331 and the feed plate 32, and the sawtooth plates 34 are circumferentially uniformly and alternately distributed with the plurality of feed windows 321; the upper edge of the sawtooth plate 34 is provided with sawteeth, and a gap is provided between the sawtooth plate 34 and the material guide disc 33.

[0043] The mature soil is usually high in humidity after completing the maturation, which is not conducive to direct screening, so it can be concentrated and spread for airing, so that the mature soil is in a semi-dry state, and an appropriate amount of humidity is retained for maintaining the activity of beneficial microorganisms. When a large amount of mature soil is screened, the mature soil can be conveyed by a conveying belt and fed into the screen structure directly above. When working, the screen 2 rotates with the support cylinder 13, and in the process of falling of the mature soil, part of the mature soil will randomly hit the sawtooth plate 34 and then fall onto the material guide disc 33. The sawtooth plate 34 with a thin plate structure and sawteeth has a splitting and crushing effect on the soil blocks, and another part of the mature soil directly falls onto the material guide disc 33. The entire material guide frame 3 also rotates synchronously with the support cylinder 13, and under the action of centrifugal force, the material guide disc 33 will rotate and throw out the mature soil more dispersedly. Here, a gap is left between the sawtooth plate 34 and the material guide disc 33, so that the mature soil can pass through the gap on the material guide disc 33, avoiding obstruction and interference to the movement of the mature soil on the material guide disc 33, and the plurality of uniformly dispersed sawtooth plates 34 also enhance the overall structural strength of the material guide frame 3. The mature soil thrown out by rotation will further pass through the feed window 321, and due to the acceleration, the mature soil will directly hit the screen surface of the screen section 22, having a further crushing effect on the soil blocks mixed in the mature soil. The material guide frame 3 guides the feeding of the mature soil, so that the mature soil will not directly fall into the cylinder of the screen 2, but slide downward from the position close to the top end of the screen section 22, so that the entire screen surface of the screen section 22 can be fully utilized to ensure the effective screening area.

[0044] As Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 11As shown, during the long screening process, the matured soil will also start to accumulate at the bottom of the cylinder of the screen 2, and it is also inevitable to cause the local blockage of the screen holes of the screen section 22. In order to avoid the gradual blockage of the screen holes during the screening process, a scraper assembly 4 is also installed. The scraper assembly 4 includes a fixed frame 41 fixed on the bottom end of the inclined feed plate 123 by bolts, a vertical rod 42 vertically welded on the fixed frame 41, a horizontal plate hinge base 43, a sleeve hinge base 44, and two scraper assemblies 45. The vertical rod 42 vertically penetrates along the central axis of the built-in bin 122 and extends into the screen 2. The horizontal plate hinge base 43 and the sleeve hinge base 44 are distributed up and down in the screen 2, and are both sleeved and fixed on the vertical rod 42 by bolts. In order to improve the stability of the vertical rod 42, the bottom center of the guide plate 33 is welded with a shaft sleeve 332, and the vertical rod 42 is inserted into the shaft sleeve 332. When the shaft sleeve 332 rotates with the guide plate 33 as a whole, the shaft sleeve 332 is in rotating contact with the vertical rod 42. The two scraper assemblies 45 are symmetrically arranged on both sides of the vertical rod 42. The scraper assembly 45 includes a scraper 453 made of alloy spring steel material, the upper end of the scraper 453 is hinged on the horizontal plate hinge base 43, the lower end of the scraper 453 is welded with an end block 451, the end block 451 is located at the lower side of the sleeve hinge base 44, the end block 451 is hinged with a spring sheet 452 also made of alloy spring steel material, the other end of the spring sheet 452 is hinged on the sleeve hinge base 44. The end block 451 is fixed with a vibrating block 455 made of rubber material. Under the elastic force of the spring sheet 452, the scraping edge of the scraper 453 is tightly attached to the screen surface of the screen section 22, and the vibrating block 455 is in contact with the screen surface in the screen section 22.

[0045] As Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the fixed frame 41 is fixedly installed with a bottom sealing assembly 5 for controlling the opening and closing of the lower end port of the screen 2; the bottom sealing assembly 5 includes an electric cylinder 52 vertically fixed at the bottom end of the fixed frame 41 by bolts, the output end of the electric cylinder 52 is welded with a sliding sleeve 511 through a connecting plate, the top end of the sliding sleeve 511 is horizontally welded with a bottom sealing disc 51, the sliding sleeve 511 and the bottom sealing disc 51 are jointly sleeved and slidably installed on the vertical rod 42, and the upper end of the bottom sealing disc 51 is a conical surface for facilitating material guiding; when the output rod of the electric cylinder 52 is not extended, the bottom sealing disc 51 is located in the fixed section 21 below the screen 2, the side wall of the bottom sealing disc 51 is in sliding contact with the inner wall of the fixed section 21, that is, the lower end port of the screen 2 is in a closed state. The end block 451 is horizontally rotatably installed with a roller 454, and when the bottom sealing disc 51 rises under the driving of the electric cylinder 52, the lower end port of the screen 2 is gradually opened, and the roller 454 can be in rolling contact with the conical surface of the bottom sealing disc 51. In this embodiment, the electric cylinder 52 adopts an intermittent starting mode, and the intermittent starting control of the electric cylinder 52 is a prior art, for example, a programmable control adjustment can be realized by using a PLC technology, the starting interval time of which can be adjusted according to the corresponding mature soil pouring flow, and under the setting of a reasonable intermittent starting time, the large particle mature soil and impurities and other materials screened and intercepted in the screen 2 can be timely discharged, so as to avoid the accumulation of a large amount of materials at the bottom end of the cylinder in the screen 2, thereby ensuring the high efficiency of the screening of the screen section 22.

[0046] In operation, the mature soil is screened through the screen section 22, and the screen 2 rotates with the supporting cylinder 13, so that the scraper 453 forms relative motion with the screen section 22, the scraper 453 will scrape and clean the screen surface, and the scraper 453 will push the mature soil through the screen hole of the screen section 22, so as to promote the mature soil to pass through the screen hole and realize screening, thereby inhibiting the blocking of screening; at this time, it needs to be explained that in the present application, the supporting part 132 is in supporting contact with the screen section 22 through the flexible pad strip 133, which belongs to non-rigid supporting contact, and during screening, firstly, the mature soil thrown out through the material guiding frame 3 will produce random vibration impact on the screen section 22, secondly, the mature soil cannot be completely uniformly distributed on the screen surface of the entire screen section 22, so that there is a small difference in local stress of the screen section 22, and thirdly, the contact resistance presents a floating change state when the scraper 453 is relatively scraped close to the screen section 22, and in summary, the screen section 22 is always in a state of micro-amplitude vibration during rotation, which can promote the mature soil to quickly pass through the screen hole or slide along the screen surface, thereby achieving the effects of promoting screening and avoiding hole blocking; in addition, in order to achieve better micro-vibration effect, ensure the structural toughness strength of the screen 2, and improve the corrosion resistance in contact with the mature soil, the screen 2 can be made of stainless steel material.

[0047] During the screening process, the matured soil of uniform size required (the material outside the screen) passes through the screen holes and falls into the shunt bin 12 and is finally discharged through the discharge port; while the material inside the screen, including the large particles of matured soil and impurities contained in the soil, etc., gradually accumulates at the bottom of the screen 2 barrel (the maximum accumulation is within a reasonable range); during the screening process, the bottom sealing assembly 5 is intermittently started, when the bottom sealing disc 51 gradually rises, the lower port of the screen 2 is opened, the material inside the screen slides through the gap between the bottom sealing disc 51 and the screen 2, and falls from the built-in bin 122 to the outside, so that the accumulated material inside the screen can be intermittently discharged, and the matured soil accumulated at the bottom of the screen 2 barrel can have sufficient time for full screening, and the time for discharging to the outside is controlled so that most of the material inside the screen is discharged and a small amount remains.

[0048] The sealing bottom disc 51 will simultaneously upwardly contact and push the two rollers 454 in the process of rising. The upward contact and pushing force of the sealing bottom disc 51 can be decomposed into a deflection force for deflecting the scraper 453 around the hinge shaft of the horizontal plate hinge base 43 and a pushing force for making the scraper 453 generate bending deformation. Under the action of the deflection force, the lower ends of the two scrapers 453 gradually deviate from the screen surface, so that the included angle between the scraper 453 and the screen surface of the screen section 22 gradually increases, and the bending deformation of the scraper 453 completes the elastic force storage. In addition, the movement of the end block 451 makes the spring sheet 452 gradually bend, and the elastic force gradually increases. When the sealing bottom disc 51 is rapidly lowered and reset to the sealing position under the instantaneous contraction of the output rod of the electric cylinder 52, on the one hand, the spring sheet 452 is instantaneously released, so as to reset the deflection of the scraper 453, and the vibration beating block 455 is in advance touched and beaten on the screen 2. Under the action of the elastic force of the spring sheet 452, the vibration beating block 455 is again contacted and pushed on the screen 2, and the scraper 453 is again closely attached to the screen surface. Under the instantaneous beating of the screen section 22, the vibration cleaning of the screen surface can be completed. It should be noted that when the vibration beating block 455 is just contacted with the screen surface of the screen section 22, the scraping edge of the scraper 453 has not contacted with the screen surface. Under the further pushing of the elastic force of the spring sheet 452, the vibration beating block 455 is compressed, and then the scraper 453 is closely attached to the screen surface. The vibration beating block 455 has the effect of buffering and protecting the scraper 453. The supporting part 132 of the supporting cylinder 13 is in contact with the screen section 22 through a plurality of flexible pad strips 133. The flexible pad strips 133 can buffer the screen section 22 in the screening process, and can also assist in generating the vibration cleaning effect in the process that the vibration beating block 455 contacts the screen section 22. The cleaning may not be completely thorough, but under the intermittent driving of the sealing bottom assembly 5, the screen section 22 can always maintain a relatively efficient cleaning state. On the other hand, the scraper 453 will be instantaneously elastically straightened, and the ripening soil on the surface of the scraper 453 will be collapsed, so as to realize the self-cleaning of the surface of the scraper 453, and avoid the phenomenon that the surface of the scraper 453 is covered with too much ripening soil after a long time of screening, so as to cause the screen section 22 to be pasted. Therefore, through the sealing bottom assembly 5 in the process of intermittent discharge, the vibration cleaning of the screen 2 and the self-cleaning of the scraper 453 can be actively completed. The structure is simple and easy to maintain. When the scraper 453 is seriously worn and the spring sheet 452 is insufficient or fails, the corresponding replacement can be carried out.

[0049] The application also provides a mature soil pretreatment screening structure, which adopts a vertical screening structure layout and a screen section 22 in the form of an inverted circular table side structure for screening, is compact in design, occupies small space, and has the screen section 22 as an effective screening surface as a whole, avoids local accumulation of screened materials, and greatly increases the effective screening area; the guide frame 3 arranged above the screen 2 can guide the put-in mature soil, the mature soil can be dispersed and rotated out by the synchronous rotation of the guide frame 3 and the screen 2, has the functions of dispersion, guidance and auxiliary crushing, and can be rotated and dropped from the top end of the screen section 22 for screening, so as to fully utilize the screening surface of the screen section 22; the bottom sealing assembly 5 can intermittently discharge the materials in the screen, and the self-cleaning of the scraper 453 and the indirect cleaning of the screen 2 can be completed by the scraper assembly 45 in cooperation with the bottom sealing assembly 5 in the process of controlling the opening and closing of the lower end port of the screen 2, so that the clogging of the screen holes is inhibited, the high efficiency of screening can be continuously maintained in the state of not stopping, and the screening structure provided by the application can separate and screen the just-matured mature soil, can synchronously clean the structure in the screening process, and can continuously and efficiently screen the mature soil.

[0050] In addition, as Figures 1 to 12 shown, the application also provides a mature soil pretreatment screening method, which comprises the following steps: S1, drying the just-matured mature soil to a semi-dry state; retaining a certain humidity to maintain the activity of beneficial microorganisms.

[0051] S2, starting the screening structure so that the screen 2 and the supporting cylinder 13 are in a rotating working state.

[0052] S3, conveying and putting the dried mature soil above the screen 2.

[0053] S4, the put-in mature soil is guided to fall on the screen surface of the screen section 22 by the guide frame 3 for rotating and dropping screening. The mature soil slides down along the screen surface under the joint action of centrifugal force and gravity, and completes synchronous screening.

[0054] S5, the bottom sealing assembly 5 intermittently opens and closes the lower end port of the screen 2 by lifting the bottom sealing disc 51, and when the bottom sealing disc 51 rises and touches the roller 454, the scraper 453 is deflected and synchronously deformed, and when the bottom sealing disc 51 instantaneously drops and resets, the scraper 453 completes self-cleaning by its own elastic force, and the spring sheet 452 makes the vibration block 455 indirectly touch the screen 2 to clean the screen surface by the elastic force.

[0055] S6, the materials outside and inside the screen obtained by screening are respectively collected by the shunt bin 12.

[0056] In the description of the application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0057] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "connection", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood through specific circumstances.

[0058] The preferred embodiments of the application are described above. It needs to be understood that the application is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications, or modify equivalent embodiments without departing from the technical solution of the application, which does not affect the essential content of the application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the application, without departing from the technical solution of the application, still belongs to the protection scope of the technical solution of the application.

Claims

1. A curing soil pretreatment screening structure, characterized by, include: The outer casing contains a support cylinder that rotates around a vertical axis. The screen has a cylindrical structure with open upper and lower ends and is embedded and fixed inside the support cylinder; the screen includes screen segments with a structure of an inverted frustum. The guide frame is horizontally fixed inside the support cylinder and located above the screen section to guide the matured soil to slide down from near the top of the screen section. The scraper assembly includes a mounting frame fixed to the bottom of the housing, a vertical rod fixed to the mounting frame, a horizontal hinge seat, a sleeve hinge seat, and multiple scraper assemblies; the vertical rod extends into the screen; the horizontal hinge seat and the sleeve hinge seat are distributed vertically within the screen and are both fixed to the vertical rod; multiple scraper assemblies are distributed circumferentially around the vertical rod and are all hinged between the horizontal hinge seat and the sleeve hinge seat; the scraper assembly includes a scraper made of elastic metal that is in close contact with the screen surface of the screen section; The bottom sealing component is fixed on the fixed frame and controls the opening and closing of the lower port of the screen. When rising, the lower port of the screen opens and touches the scraper component upward. The scraper deviates from the screen surface of the screen section around the hinge axis at the hinge seat of the horizontal plate, and the scraper gradually bends. When descending, the lower port of the screen closes, the scraper deflects and resets, and beats the screen for vibration cleaning. The scraper springs straighten for self-cleaning. The scraper assembly also includes an end block fixed to the lower end of the scraper, the upper end of the scraper is hinged to the horizontal plate hinge seat, and a spring plate is hinged between the end block and the sleeve hinge seat; under the elastic force of the spring plate, the scraper presses against the screen surface of the screen section. The support cylinder includes a support part with a hollow structure and an inverted frustum shape. Multiple flexible pads are fixedly distributed circumferentially on the inner side of the support part. The screen segment is embedded in the support part, and the multiple flexible pads and the outer screen surface of the screen segment are supported and in contact together. A vibrating block made of flexible material is fixed on the end block. Under the elastic force of the spring sheet, the vibrating block abuts against the screen surface inside the screen segment.

2. The pretreatment screening structure for matured soil according to claim 1, characterized in that: The bottom sealing assembly includes a bottom sealing plate that is slidably mounted on a vertical pole. The bottom sealing plate is located inside the lower port of the screen and has a conical upper end. A roller is horizontally rotatably mounted on the end block. When the bottom sealing plate rises, the roller makes rolling contact with the conical surface of the bottom sealing plate.

3. The pretreatment screening structure for matured soil according to claim 1, characterized in that: The guide frame includes a fixing ring fixed to the inner wall of the support cylinder, a circular feed plate horizontally fixed inside the fixing ring, a conical guide disc fixed inside the feed plate ring, and multiple circumferentially distributed feed windows on the feed plate.

4. The pretreatment screening structure for matured soil according to claim 3, characterized in that: A central rod is vertically fixed at the top center of the guide plate, and multiple serrated plates with multiple feeding windows are fixed between the central rod and the feeding plate. The upper edge of the serrated plates is provided with serrations, and a gap is provided between the serrated plates and the guide plate.

5. The pretreatment screening structure for matured soil according to claim 3, characterized in that: The outer shell includes a cylindrical hopper; the supporting cylinder also includes two vertically distributed fixing parts, which are cylindrical in shape, and the supporting cylinder is rotatably installed inside the cylindrical hopper through the two fixing parts; the fixing ring is fixed inside the upper fixing part.

6. The pretreatment screening structure for matured soil according to claim 5, characterized in that: The outer casing also includes a diversion chamber; the diversion chamber includes an outer chamber, an inner chamber, and an inclined material plate; the outer chamber is cylindrical and fixed at the bottom of the cylindrical chamber; the inner chamber has a trumpet-shaped structure, and is located inside the outer chamber, with the lower end of the supporting cylinder extending into the upper port of the inner chamber; both the outer and inner chambers have flush, beveled ends at their bottom ends, and the inclined material plate is fixed between the beveled ends of the outer and inner chambers, with a material drop outlet at the bottom of the inclined material plate; the fixing frame is fixed at the bottom of the inclined material plate, and the upright passes through the inner chamber.

7. A method for screening pretreated mature soil, comprising screening using the pretreated mature soil screening structure as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Dry the freshly matured soil until it is semi-dry. S2. Start the screening structure so that the screen rotates with the support cylinder. S3. Convey the dried and matured soil onto the screen. S4. The mature soil is guided by the guide frame to fall onto the screen surface of the screen section for rotating and sliding screening. S5. The bottom sealing assembly intermittently opens and closes the lower end port of the screen, the top contact scraper assembly cleans the scraper, and the scraper assembly intermittently contacts and beats the screen to clean the screen surface. S6. Collect the material outside the sieve and the material inside the sieve separately.

Images