Building muck crushing and screening device

Abstract

The utility model provides a building muck crushing and screening device which comprises a feeding conveying belt, a first-stage crushing bin, a screening plate, a second-stage crushing bin and a second discharging conveying belt which are sequentially arranged in a lap joint mode from top to bottom. The first-stage crushing bin and the second-stage crushing bin are arranged in a staggered and spaced mode in the height direction of the first-stage crushing bin and the second-stage crushing bin. According to the building muck crushing device, the feeding conveying belt carries the building muck into the first-stage crushing bin for primary processing, and part of the building muck enters the second-stage crushing bin along the obliquely arranged screening plate for reprocessing, so that the large building muck is crushed by arranging the first-stage crushing bin, and the crushing pressure of the second-stage crushing bin on the building muck is reduced; while the muck crushing efficiency is improved, the situation that parts are damaged due to the fact that large stone blocks directly impact the screening plate is avoided, and the problems that a traditional crushing device is low in crushing efficiency, and crushed building muck cannot directly reach the recycling standard are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction waste crushing, in particular to a construction waste crushing and screening device. Background Art

[0002] Construction waste is mainly a mixture of waste soil, broken stones, waste mortar, brick and tile fragments, concrete blocks, asphalt blocks, waste plastics, waste metal materials, waste bamboo and wood, etc. If it is directly transported to the construction waste yard without any treatment, it will generally take decades for the construction waste in the yard to stabilize. During this period, the large amount of hydrated calcium silicate and calcium hydroxide contained in the waste mortar and concrete blocks will make the percolation water highly alkaline, the large amount of sulfate ions contained in the waste gypsum will be converted into hydrogen sulfide under anaerobic conditions, the waste cardboard and waste wood can dissolve lignin and tannic acid under anaerobic conditions and decompose to generate volatile organic acids, and the waste metal materials can make the percolation water contain a large amount of heavy metal ions, thereby polluting the surrounding groundwater, surface water, soil and air, and the polluted area can also be expanded to other places outside the storage area. Moreover, even if the construction waste has reached a stable level, the yard no longer releases harmful gases, and the percolation water no longer pollutes the environment, a large amount of inorganic matter will still remain in the stacking place, occupying a large amount of land and causing lasting environmental problems.

[0003] As mentioned above, the treatment of construction waste is particularly important. At present, the treatment of construction waste in the domestic market mainly adopts the method of screening and discharging after crushing. Because its crushing degree and screening accuracy are the key steps for whether construction waste can reasonably become a renewable resource. When the existing crushing device crushes construction waste, it often adopts a single-stage crushing method. Regardless of the size of the individual waste, the transported waste is uniformly crushed by the rotating drum. It can only output coarser particles within a certain range, which reduces the crushing efficiency to a certain extent. The crushed product cannot meet the reuse standard to a certain extent, resulting in greater limitations in the process of recycling and reusing construction waste. Utility Model Content

[0004] The utility model aims to provide a construction waste soil crushing and screening device to solve the problem that the crushing efficiency of the traditional crushing device is low and the construction waste soil cannot directly meet the recycling and reuse standards after being crushed.

[0005] In order to solve the above-mentioned technical problems, the utility model provides a construction waste crushing and screening device, which includes a feed conveyor belt, a primary crushing bin, a screening plate, a secondary crushing bin and a second discharge conveyor belt which are overlapped and arranged in sequence from top to bottom. The primary crushing bin and the secondary crushing bin are arranged at intervals along their height direction. The feed conveyor belt carries the construction waste into the primary crushing bin for primary processing, and part of the construction waste enters the secondary crushing bin along the inclined screening plate for further processing. A vibration device is provided on the screening plate.

[0006] In a preferred embodiment: a first crushing roller for crushing construction debris is rotatably arranged in the primary crushing bin, and the first crushing roller includes a rotating shaft radially penetrating the primary crushing bin, crushing blades fixed on the circumferential wall of the rotating shaft, and a driving mechanism for driving the rotating shaft to rotate.

[0007] In a preferred embodiment: the number of the first crushing rollers is no less than three, and they are staggered left and right along the axis of the primary crushing bin, and two first crushing rollers adjacent to each other intersect tangentially.

[0008] In a preferred embodiment, the two first crushing rollers adjacent to each other on the left and right rotate in opposite directions and rotate toward each other along the axis direction of the primary crushing bin.

[0009] In a preferred embodiment: the sieve plate is provided with sieve holes, and the arrangement range of the sieve holes is adapted to the first discharging conveyor belt arranged under the sieve plate.

[0010] In a preferred embodiment, two second crushing rollers are radially arranged in the secondary crushing chamber, and the two second crushing rollers are horizontally arranged and meshed with each other.

[0011] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0012] The utility model provides a construction waste soil crushing and screening device, which crushes large pieces of construction waste soil by arranging a primary crushing bin, thereby reducing the crushing pressure of the secondary crushing bin on the construction waste soil, improving the waste soil crushing efficiency while avoiding large pieces of stone directly hitting the screening plate and causing damage to components.

[0013] The utility model provides a construction waste crushing and screening device, which achieves the functions of screening small pieces of construction waste and draining large pieces of construction waste at the same time by obliquely arranging a screening plate with a vibration device between two crushing bins arranged at offset intervals. The mutual overlapping and linkage between components makes the device have the advantages of reasonable and compact structure, high degree of automation, wide application range and strong practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the planar structure of the screening plate of the utility model;

[0016] Figure 3 It is a top view of the second crushing roller of the utility model. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0020] refer to Figure 1-3 The construction waste soil crushing and screening device described in this embodiment comprises a feed conveyor belt 11, a primary crushing bin 12, a screening plate 13, a secondary crushing bin 14 and a second discharge conveyor belt 15 which are overlapped and arranged in sequence from top to bottom. The primary crushing bin 12 and the secondary crushing bin 14 are arranged at intervals along their own height direction. The construction waste soil carried by the feed conveyor belt 11 enters the primary crushing bin 12 for primary processing, and part of the construction waste soil enters the secondary crushing bin 14 along the inclined screening plate 13 for further processing. By setting the primary crushing bin 12 to crush large pieces of construction waste soil, the crushing pressure of the secondary crushing bin 14 on the construction waste soil is reduced, and the crushing efficiency of the waste soil is improved while avoiding the damage of components caused by large pieces of stone directly hitting the screening plate 13.

[0021] The screening plate 13 is arranged between the primary crushing chamber 12 and the secondary crushing chamber 14 at a certain inclination angle, and the front section thereof is used to receive the slag material leaking out after being crushed by the primary crushing chamber 12, and the rear section thereof extends to the top opening position of the secondary crushing chamber 14 at a certain inclination angle. The slag material moves to the position of the sieve hole under the action of gravity, and the slag material smaller than the diameter of the sieve hole is filtered by the sieve hole during the movement and is transmitted downward to the first discharging conveyor belt 16 adapted to the arrangement range of the sieve hole 13. In addition, considering that the primary crushing chamber 12 cannot realize uniform crushing of the construction waste, the large-particle waste waste and the small-particle waste waste are directly transported downward in a mixed state, which not only easily affects the later treatment of the waste waste and the utilization of the forming of new materials, but also because the shape of the crushed slag material is not fixed, when the crushed slag material passes through the screening plate 13, part of the slag material close to the diameter of the sieve hole 131 is easily stuck in the sieve hole 131, resulting in the inability of the subsequent slag material to pass normally, which undoubtedly reduces the effect of slag material screening. In view of this, the utility model is provided with a vibration device on the screening plate 13, and the vibration device is a vibration motor. When the vibration motor is driven to work, the screening plate 13 can be made to vibrate at a uniform speed. When the slag particles are stuck on the sieve holes 131, after vibration, the slag stuck in the sieve holes 131 falls under the dual effects of the vibration force and its own gravity, so as to avoid blocking the sieve holes all the time and affecting the subsequent efficiency. By setting the screening plate 131 with a vibration device, the small pieces of construction debris can be screened and the large pieces of construction debris can be drained at the same time.

[0022] The first crushing roller 121 for crushing construction waste is rotatably arranged in the primary crushing chamber 12, and the first crushing roller 121 includes a rotating shaft 1210 that is radially penetrated and arranged in the primary crushing chamber 12, a crushing blade 1211 fixed on the peripheral wall surface of the rotating shaft 1210, and a driving mechanism for driving the rotating shaft 1210 to rotate. The number of the first crushing rollers 121 is not less than three groups, and they are staggered left and right along the axis direction of the primary crushing chamber 12. Two adjacent first crushing rollers 121 on the left and right intersect tangentially and rotate in opposite directions. Specifically, when the primary crushing bin 12 is working, the first crushing roller 121 arranged on the left side of the axis direction of the primary crushing bin 12 rotates clockwise around its rotation axis 1210, and the first crushing roller 121 arranged on the right side of the axis direction of the primary crushing bin 12 rotates counterclockwise around its rotation axis 1210. The two crushing rollers rotating in opposite directions can effectively guide the construction debris entering the feed port of the primary crushing bin 12 along the direction of the feed conveyor belt 11 to the center of the crushing bin, so as to improve the crushing degree of the debris by the primary crushing bin 12. From the perspective of spatial position coordination, the cross-sectional shape of the first crushing rollers 121 arranged left and right along the axis direction of the primary crushing bin 12 is arranged in a triangular shape, and the staggered rollers extend the flow path of the miscellaneous materials in the primary crushing bin 12, further improving the crushing effect of the primary crushing bin 12.

[0023] After the slag is crushed by the primary crushing bin 12, the slag with a smaller diameter is screened out under the treatment of the vibrating screen plate 13, and the slag with a diameter larger than the screen hole 131 is guided into the secondary crushing bin 14 along the arrangement direction of the screen plate 13. Two second crushing rollers 141 are radially arranged in the secondary crushing bin 14, and the two second crushing rollers 141 are horizontally parallel and meshed with each other, which are used to further crush the slag. Finally, the crushed slag enters the second discharging conveyor belt 15 laid at the bottom of the secondary crushing bin 14 from top to bottom. The device not only crushes the slag multiple times through the close connection between the feed conveyor belt 11, the primary crushing bin 12, the screen plate 13, the secondary crushing bin 14 and the second discharging conveyor belt 15, which are overlapped from top to bottom, but also connects the circulation of the slag through the inclined screen plate 13, thereby reducing the investment cost of the transfer equipment. Through the mutual overlap and linkage between the components, the device has the advantages of reasonable and compact structure, high degree of automation, wide application range and strong practicality.

[0024] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A construction waste crushing and screening device, comprising a feed conveyor belt (11), a primary crushing bin (12), a screening plate (13), a secondary crushing bin (14) and a second discharge conveyor belt (15) which are overlapped and arranged in sequence from top to bottom, characterized in that: The primary crushing bin (12) and the secondary crushing bin (14) are arranged at intervals along their height direction; the feed conveyor belt (11) carries construction debris into the primary crushing bin for primary processing; part of the construction debris enters the secondary crushing bin (14) along an inclined screening plate (13) for further processing; and a vibration device is provided on the screening plate (13).

2. The construction waste crushing and screening device according to claim 1, characterized in that: A first crushing roller (121) for crushing construction debris is rotatably arranged in the primary crushing bin (12), and the first crushing roller (121) comprises a rotating shaft (1210) radially penetrating the primary crushing bin (12), crushing blades (1211) fixed on the peripheral wall surface of the rotating shaft (1210), and a driving mechanism for driving the rotating shaft to rotate.

3. The construction waste crushing and screening device according to claim 2, characterized in that: The first crushing rollers (121) are at least three groups and are arranged in a staggered manner along the axis of the primary crushing bin (12), and two first crushing rollers (121) adjacent to each other on the left and right intersect tangentially.

4. The construction waste crushing and screening device according to claim 3 is characterized in that: The two first crushing rollers (121) adjacent to each other on the left and right rotate in opposite directions and rotate towards each other along the axis direction of the primary crushing bin (12).

5. The construction waste crushing and screening device according to claim 1, characterized in that: The sieve plate (13) is provided with sieve holes (131), and the arrangement range of the sieve holes (131) is adapted to a first discharging conveyor belt (16) arranged under the sieve plate (13).

6. The construction waste crushing and screening device according to claim 1, characterized in that: Two second crushing rollers (141) are radially arranged in the secondary crushing bin (14), and the two second crushing rollers (141) are arranged horizontally and mesh with each other.

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