Building solid waste regeneration cycle process

Abstract

The invention relates to the technical field of building solid waste regeneration, in particular to a building solid waste regeneration cycle process which comprises the following specific steps: S1, separating reinforcing steel bars; the reinforced concrete is coarsely crushed through the reinforcing steel bar stripping device, and reinforcing steel bars are stripped; the reinforcing steel bar stripping device comprises a shell, a fixed roller and a floating roller, an inlet is formed in the top of the shell, and the fixed roller and the floating roller are arranged in the shell side by side and used for stripping reinforcing steel bars entering the shell. Independent radial movement of each section is allowed through the multi-section floating roller structure, local deformation avoidance can be achieved when the steel bars are encountered, and overall shutdown adjustment is not needed. By means of the design, the problem that a traditional rigid roller is prone to being stuck or rolled forcibly in a reinforcing steel bar dense area is solved; through the flexible connection characteristic of the Schmidt coupler, the continuity of torque transmission is guaranteed, and the device is particularly suitable for treating the complex working conditions that steel bars are not evenly distributed or bending deformation exists.

Description

Technical Field

[0001] The invention relates to the technical field of construction solid waste recycling, in particular to a construction solid waste recycling process. Background Art

[0002] With the acceleration of urbanization, the demolition and reconstruction of old buildings and roads, and the large-scale construction of residential and municipal facilities have generated a large amount of construction demolition waste. The amount of solid waste generated by the construction industry has increased year by year. A large amount of construction solid waste is directly transported to the suburbs of towns and dumped in the open air without any treatment, occupying land and continuously polluting soil, water sources, rivers and vegetation. Comprehensive recycling of construction solid waste plays an important role in solving the siege problems and environmental pollution problems faced by towns.

[0003] At present, the research on the recycling and treatment methods of construction solid waste mainly focuses on crushing and recycling to make building materials again, such as recycled aggregates and recycled concrete. However, the existing crushing process of construction solid waste generally crushes the concrete with steel bars together, and then screens out the metals through a magnetic separation device, which not only greatly increases the burden on the crushing device, but the repeated magnetic separation steps also reduce the processing efficiency. Summary of the invention

[0004] In view of the problems of the prior art, the present invention provides a construction solid waste recycling process, and the specific technical solution is as follows:

[0005] The specific steps of construction solid waste recycling process are as follows:

[0006] S1, steel bar separation;

[0007] The reinforced concrete is roughly crushed and the steel bars are stripped by a steel bar stripping device to obtain construction solid waste materials with a particle size of 175-300 mm and whole steel bars;

[0008] S2, aggregate crushing;

[0009] The construction solid waste is crushed by a cone crusher to obtain materials with a particle size less than 5 mm;

[0010] S3, recycled aggregate preparation;

[0011] Cement and fly ash are added to the material crushed by the cone crusher, and then placed in a mold for compaction.

[0012] As a further technical solution of the present invention, the steel bar stripping device comprises a shell, a fixed roller and a floating roller, the top of the shell has an inlet, the fixed roller and the floating roller are arranged in parallel in the shell, and are used to strip the steel bars entering the shell;

[0013] As a further technical solution of the present invention, both the fixed roller and the floating roller have crushing sections and transition sections alternately arranged along the axial direction, and the crushing sections and transition sections on the fixed roller and the floating roller are staggered.

[0014] As a further technical solution of the present invention, the floating roller includes crushing rings and transition rings alternately connected in the axial direction, and the crushing rings and transition rings are connected by a coupling structure to allow relative movement in the radial direction.

[0015] As a further technical solution of the present invention, the coupling structure includes disc one, disc two and a connecting ring, wherein disc one, disc two and the connecting ring are parallel to each other, and the connecting ring is arranged between disc one and disc two at intervals, and the connecting ring and disc one are connected by multiple groups of connecting rods one, one end of the connecting rod one is rotatably connected to disc one, and the other end is rotatably connected to the connecting ring, and the connecting ring and disc two are connected by multiple groups of connecting rods two, one end of the connecting rod two is rotatably connected to disc two, and the other end is rotatably connected to the connecting ring.

[0016] As a further technical solution of the present invention, an elastic structure is arranged between the crushing ring and the transition ring, and the elastic structure includes a ring groove, an insert ring, a spring 1 and a spring 2. The insert ring is coaxially inserted into the ring groove, the spring 1 is connected between the inner ring wall of the insert ring and the inner wall of the ring groove, and the spring 2 is connected between the outer ring wall of the insert ring and the outer wall of the ring groove.

[0017] As a further technical solution of the present invention, a reserved cavity for accommodating the coupling structure is provided on the end surfaces of the crushing ring and the transition ring facing each other.

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

[0019] In this application, the multi-section floating roller structure allows each section to move radially independently, and when encountering steel bars, it can deform locally to avoid them without the need to stop the entire machine for adjustment. This design breaks through the problem that traditional rigid rollers are easily stuck or forcibly crushed in areas with dense steel bars; the flexible connection characteristics of the Schmidt coupling ensure the continuity of torque transmission, which is particularly suitable for handling complex working conditions with uneven distribution of steel bars or bending deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 work.

[0021] Figure 1The overall structural schematic diagram of the steel bar stripping device is shown;

[0022] Figure 2 A schematic diagram of the structure of a floating roller is shown;

[0023] Figure 3 A schematic structural diagram of the coupling structure is shown;

[0024] Figure 4 A structural schematic diagram of the elastic structure is shown.

[0025] Description of the drawings: 100, shell; 110, inlet; 200, fixed roller; 300, floating roller; 310, crushing ring; 320, transition ring; 330, reserved cavity; 400, coupling structure; 410, disc one; 420, disc two; 430, connecting ring; 440, connecting rod one; 450, connecting rod two; 500, elastic structure; 510, ring groove; 520, insert ring; 530, spring one; 540, spring two. DETAILED DESCRIPTION

[0026] 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.

[0027] The specific steps of construction solid waste recycling process are as follows:

[0028] S1, steel bar separation;

[0029] The reinforced concrete is roughly crushed and the steel bars are stripped by a steel bar stripping device to obtain construction solid waste materials with a particle size of 175-300 mm and whole steel bars;

[0030] S2, aggregate crushing;

[0031] The construction solid waste is crushed by a cone crusher to obtain materials with a particle size less than 5 mm;

[0032] S3, recycled aggregate preparation;

[0033] Cement and fly ash are added to the material crushed by the cone crusher, and then placed in a mold for compaction.

[0034] Add cement, fly ash and other binders to the crushed and classified materials, mix them evenly in a weight ratio of 1:0.5, and stir them in a mixer for 10-15 minutes; then put them into a mold for compaction and curing for more than 7 days. The surface modification treatment uses a dopamine hydrochloride coating with a concentration of 1%-5% to enhance the mechanical properties of the recycled aggregate.

[0035] Figure 1 The overall structural schematic diagram of the steel bar stripping device is shown; Figure 1 The steel bar stripping device comprises a shell 100, a fixed roller 200 and a floating roller 300. The shell 100 has an inlet 110 at the top. The fixed roller 200 and the floating roller 300 are arranged in parallel in the shell 100 for stripping steel bars from materials entering through the inlet 110. There is a gap between the fixed roller 200 and the floating roller 300, and the gap is directly below the inlet 110. When reinforced concrete enters the shell 100 through the inlet 110, it will directly fall into the gap between the fixed roller 200 and the floating roller 300, and the fixed roller 200 and the floating roller 300 will be used to crush the reinforced concrete and The steel bars are peeled off; both the fixed roller 200 and the floating roller 300 have crushing sections and transition sections alternately arranged along the axial direction, that is, when extending along the axial direction, the fixed roller 200 and the floating roller 300 are in an alternating extension state of a crushing section, a transition section, and then a crushing section, and the crushing sections and transition sections on the fixed roller 200 and the floating roller 300 are staggered; that is, the crushing section on the fixed roller 200 corresponds to the transition section on the floating roller 300, and the transition section on the fixed roller 200 corresponds to the crushing section on the floating roller 300, and the two have the crushing sections cross-designed to tear up the fallen reinforced concrete.

[0036] It should be noted that the rotation direction of the fixed roller 200 is opposite to that of the floating roller 300, which can be achieved by two gears meshing with each other, that is, the two gears meshing with each other are coaxially connected to the fixed roller 200 and the floating roller 300 respectively. When the fixed roller 200 or the floating roller 300 is connected to the driving force, the two can rotate in opposite directions.

[0037] Figure 2The structure diagram of the floating roller 300 is shown; the floating roller 300 includes a crushing ring 310 and a transition ring 320 which are alternately connected in the axial direction, and the crushing ring 310 and the transition ring 320 are connected by a coupling structure 400 to allow relative movement in the radial direction; that is, the traditional one-piece roller structure is changed into a floating structure, so that the crushing ring 310 is used as a crushing section to correspond to the transition section on the fixed roller 200, and the transition ring 320 is used as a transition section to correspond to the crushing section on the fixed roller 200; and the crushing ring 310 and the transition ring 320 are connected by a coupling structure 400, which not only realizes the axial transmission of the two, but also ensures that the two can move relative to each other. Relative radial movement is allowed between the crushing ring 310 and the transition ring 320 to achieve a floating connection. That is to say, in actual use, under normal conditions, the floating roller 300 as a whole still cooperates with the fixed roller 200 to achieve the crushing of concrete. However, when the floating roller 300 contacts the steel bars, the pressure that crushes the steel bars is greater than the relative movement force between the crushing ring 310 and the transition ring 320, that is, the steel bars force the crushing ring 310 or the transition ring 320 at its location to move outward. However, during the process of the crushing ring 310 or the transition ring 320 moving outward, the axial transmission is not interfered, but the rotation center of the steel bars changes.

[0038] For example, when the axial position of one of the crushing rings 310 contacts the steel bar, the crushing ring 310 is pressed by the steel bar and moves radially to the side away from the steel bar. In this process, the crushing ring 310 and its two adjacent transition rings 320 still undergo axial transmission, that is, the rotation speed and rotation direction of the crushing ring 310 do not change. In other words, the crushing ring 310 still rotates synchronously to deliver the steel bar after being compressed and radially displaced.

[0039] Figure 3 shows a schematic structural diagram of the coupling structure 400; Figure 3In the embodiment, the coupling structure 400 includes a disk 1 410, a disk 2 420 and a connecting ring 430. The disk 1 410, the disk 2 420 and the connecting ring 430 are parallel to each other, and the connecting ring 430 is arranged between the disk 1 410 and the disk 2 420 at intervals. The connecting ring 430 and the disk 1 410 are connected by a plurality of connecting rods 1 440. One end of the connecting rod 1 440 is rotatably connected to the disk 1 410, and the other end is rotatably connected to the connecting ring 430. The connecting ring 430 and the disk 2 420 are connected by a plurality of connecting rods 2 450. One end is rotatably connected to disk 2 420, and the other end is rotatably connected to connecting ring 430; that is, through connecting ring 430, multiple connecting rods 1 440 and multiple connecting rods 2 450, they are connected between disk 1 410 and disk 2 420 to form a Schmidt coupling structure, so that disk 1 410 and disk 2 420 can be axially non-axially driven; in actual use, coupling structure 400 is connected between crushing ring 310 and transition ring 320, and disk 1 410 and disk 2 420 are coaxially connected to crushing ring 310 and transition ring 320 respectively.

[0040] Figure 4 shows a schematic structural diagram of the elastic structure 500; Figure 4 In the embodiment, an elastic structure 500 is arranged between the crushing ring 310 and the transition ring 320. The elastic structure 500 includes an annular groove 510, an insert ring 520, a spring 1 530 and a spring 2 540. The insert ring 520 is coaxially inserted into the annular groove 510. The spring 1 530 is connected between the inner ring wall of the insert ring 520 and the inner wall of the annular groove 510. The spring 2 540 is connected between the outer ring wall of the insert ring 520 and the outer wall of the annular groove 510. When the crushing ring 310 and the transition ring 320 move relative to each other, the insert ring 520 is released in the annular groove 510. The spring 1 530 and the spring 2 540 generate radial displacement and deform. When the steel bar is separated from between the fixed roller 200 and the floating roller 300, the elastic force of the spring 1 530 and the spring 2 540 can reset the floating roller 300. It should be noted that when the floating roller 300 crushes concrete, the shape of the floating roller 300 does not change due to the drive of the spring 1 530 and the spring 2 540. Only when it is compressed by the steel bar can the crushing ring 310 and the transition ring 320 be driven to move relative to each other in the radial direction to achieve floating.

[0041] Continue to see Figure 4 A reserved cavity 330 for accommodating the coupling structure 400 is provided on the end surfaces of the crushing ring 310 and the transition ring 320 facing each other; the reserved cavity 330 is provided to provide a setting space for the coupling structure 400 to ensure a tight connection between the crushing ring 310 and the transition ring 320.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. Construction solid waste recycling process, characterized in that: The specific steps are as follows: S1, steel bar separation; The reinforced concrete is roughly crushed and the steel bars are stripped by a steel bar stripping device to obtain construction solid waste materials with a particle size of 175-300 mm and whole steel bars; S2, aggregate crushing; The construction solid waste is crushed by a cone crusher to obtain materials with a particle size less than 5 mm; S3, recycled aggregate preparation; Cement and fly ash are added to the material crushed by the cone crusher, and then placed in a mold for compaction.

2. The construction solid waste recycling process according to claim 1, characterized in that: The steel bar stripping device comprises a housing (100), a fixed roller (200) and a floating roller (300); the housing (100) has an inlet (110) at the top; the fixed roller (200) and the floating roller (300) are arranged in parallel in the housing (100) and are used to strip the steel bars entering the housing (100); The fixed roller (200) and the floating roller (300) both have crushing sections and transition sections that are alternately arranged along the axial direction, and the crushing sections and transition sections on the fixed roller (200) and the floating roller (300) are staggered.

3. The construction solid waste recycling process according to claim 2 is characterized by: The floating roller (300) comprises crushing rings (310) and transition rings (320) which are alternately connected in the axial direction. The crushing rings (310) and transition rings (320) are connected via a coupling structure (400) to allow relative movement in the radial direction.

4. The construction solid waste recycling process according to claim 3 is characterized by: The coupling structure (400) includes a disk one (410), a disk two (420) and a connecting ring (430), wherein the disk one (410), the disk two (420) and the connecting ring (430) are parallel to each other, and the connecting ring (430) is arranged between the disk one (410) and the disk two (420) at intervals, and the connecting ring (430) and the disk one (410) are connected by a plurality of connecting rods one (440), one end of the connecting rod one (440) is rotatably connected to the disk one (410), and the other end is rotatably connected to the connecting ring (430), and the connecting ring (430) and the disk two (420) are connected by a plurality of connecting rods two (450), one end of the connecting rod two (450) is rotatably connected to the disk two (420), and the other end is rotatably connected to the connecting ring (430).

5. The construction solid waste recycling process according to claim 4 is characterized by: An elastic structure (500) is arranged between the crushing ring (310) and the transition ring (320), and the elastic structure (500) comprises an annular groove (510), an insert ring (520), a spring 1 (530) and a spring 2 (540). The insert ring (520) is coaxially inserted into the annular groove (510), the spring 1 (530) is connected between the inner annular wall of the insert ring (520) and the inner wall of the annular groove (510), and the spring 2 (540) is connected between the outer annular wall of the insert ring (520) and the outer wall of the annular groove (510).

6. The construction solid waste recycling process according to claim 4 is characterized by: A reserved cavity (330) for accommodating the coupling structure (400) is provided on the end surfaces of the crushing ring (310) and the transition ring (320) facing each other.

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