Circulating crushing and screening device for milling materials

Abstract

The utility model discloses a circulating crushing and screening device for milling materials, which comprises a circulating transmission device, a sorting device and a crushing device, the circulating transmission device is used for transmitting the milling materials into the sorting device, the sorting device is used for screening the transmitted milling materials, unqualified milling materials are transmitted into the crushing device to be crushed, and the crushing device is used for crushing the unqualified milling materials. The crushing device is used for conveying the crushed materials back into the circulating device; the sorting device comprises a first screening part, a second screening part and a third screening part, the first screening part is connected with a crushing device, the aperture of the first screening part is larger than that of the second screening part, and the aperture of the second screening part is larger than that of the third screening part. The device is high in working efficiency. According to the device, milling and planing materials are primarily screened and then crushed, the crushing workload is reduced through primary screening, and the crushing working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of milling material crushing, in particular to a circulating crushing and screening device for milling materials. Background Art

[0002] The milling material crushing and screening technology mainly uses crushing equipment and screening equipment to crush and screen milling materials. The crushing equipment crushes the milling materials into particles of different particle sizes by means of impact, extrusion, etc., and the screening equipment uses a sieve mesh to screen the crushed particles, so as to realize the separation of particles of different particle sizes. Summary of the Invention

[0003] In order to solve the above deficiencies of the prior art, the utility model provides a circulating crushing and screening device for milling materials.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a circulating crushing and screening device for milling materials, including a circulating transmission device, a sorting device and a crushing device. The circulating transmission device is used to transmit the milling materials into the sorting device. The sorting device is used to screen the transmitted milling materials, and transmit the unqualified ones into the crushing device for crushing. The crushing device is used to transmit the crushed materials back into the circulating device;

[0005] The sorting device includes a first screening member, a second screening member and a third screening member. The first screening member is connected to the crushing device. The aperture of the first screening member is larger than that of the second screening member, and the aperture of the second screening member is larger than that of the third screening member.

[0006] Preferably, the circulating transmission device includes a feeding member, a milling material transmission channel and a crushed milling material transmission channel. The feeding member is located above one side of the milling material transmission channel, and the other side of the milling material transmission channel is located above the first screening member. The crushing device is located on one side of the crushed milling material transmission channel, and the other side of the crushed milling material transmission channel is connected to the milling material transmission channel.

[0007] Preferably, the feeding member is vertically located on the milling material transmission channel. The feeding member includes a milling material feeding bin and a milling material discharging port. One end of the milling material discharging port is connected to the milling material feeding bin, and the other end is located above the milling material transmission channel.

[0008] Preferably, the first screening member includes a first layer of sieve mesh and a milling material crushing feeding channel. One end of the milling material crushing feeding channel is connected to the first layer of sieve mesh, and the other end is connected to the crushing device. And the height of the milling material crushing feeding channel is lower than or equal to the height of the first layer of sieve mesh.

[0009] Preferably, the second screening member includes a second layer of sieve mesh and a first discharging port. The second layer of sieve mesh is inclined, and the first discharging port is connected to the lowest end of the second layer of sieve mesh.

[0010] Preferably, the second sieving member includes a third-layer sieve, a second discharge port, and a third discharge port. The third-layer sieve is inclined, the second discharge port is connected to the lowest end of the third-layer sieve, and the third discharge port is hermetically connected to the third-layer sieve and is located below the third-layer sieve.

[0011] Preferably, a first-grade RAP material conveying channel is arranged below the first discharge port, a second-grade RAP material conveying channel is arranged below the second discharge port, and a third-grade RAP material conveying channel is arranged below the third discharge port.

[0012] Preferably, the crushing device includes a double-toothed roll crushing device and a crushing discharge port. The milling material crushing feed channel is connected to the double-toothed roll crushing device, and the discharge port is located above the crushed milling material conveying channel.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. High working efficiency. The device first performs primary screening on the milling material and then performs crushing. The primary screening reduces the workload of crushing and improves the working efficiency of crushing.

[0015] 2. Good economic benefits. The device is provided with a circulating crushing and screening system, which can greatly utilize the milled material of the old asphalt pavement, and the recycling rate is as high as 100%.

[0016] 3. Good environmental protection benefits. Through the measure of prior screening, the purpose of reducing dust step by step is achieved, the dust removal pressure is smaller, and the construction operation is safer and more environmentally friendly.

[0017] 4. Advanced technical level. The device passes through the screening system by setting three layers of sieves, and different discharge ports are set for each layer of sieve, that is, three-grade screening is carried out to obtain RAP material that meets the requirements, which can be directly used for the production of plant-mixed cold recycled asphalt mixture.

[0018] 5. High transmission efficiency and low cost. The device adopts a roller belt transmission system, which has good flexibility and elasticity, can absorb and distribute the impact force generated during the transmission process, has stable transmission and low noise. The roller belt transmission can realize the change of high speed, medium speed and low speed, has high transmission efficiency, usually between 0.9 and 0.99. The roller belt transmission system is simple and easy to implement, has low cost, is easy to maintain, and is also convenient for disassembly and replacement. Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of the present utility model.

[0020] Markings in the figure: 11 - Milling material feeding bin, 12 - Milling material discharge port, 2 - Sorting device, 21 - First layer of sieve, 22 - Second layer of sieve, 23 - Third layer of sieve, 24 - First discharge port, 25 - Second discharge port, 26 - Third discharge port, 3 - Crushing system, 31 - Milling material crushing inlet channel, 32 - Double-tooth roll crushing device, 33 - Crushing discharge port, 41 - Milling material conveying channel, 42 - First-grade RAP material conveying channel, 43 - Second-grade RAP material conveying channel, 44 - Third-grade RAP material conveying channel, 45 - Crushed milling material conveying channel. Detailed implementation mode

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0022] The present invention will be described in detail below with reference to the drawings and embodiments.

[0023] Embodiment 1

[0024] As Figure 1 shown, a cyclic crushing and screening device for milling materials includes a cyclic transmission device, a sorting device 2, and a crushing device 3. The cyclic transmission device transports the milling materials into the sorting device 3. The sorting device 3 screens the transported milling materials, transports the unqualified ones into the crushing device 3 for crushing, and screens the qualified ones one by one according to size. The crushing device 3 is used to transport the crushed materials back into the cyclic device. After the old asphalt concrete pavement is milled, it is transported to the crushing and screening site, and the processing of the old asphalt concrete pavement milling materials starts through the milling material feeding bin 11 and the milling material discharge port 12.

[0025] The materials of the sieve meshes are all made of metal materials. The milled materials of the old asphalt concrete pavement enter the first-layer sieve mesh 21 through the circulating transmission device. The sieve hole diameter of the first-layer sieve mesh 21 is 31 mm. The milled materials larger than 31 mm enter the crushing system 3 after primary vibration screening. The milled materials smaller than 31 mm enter the second-layer sieve mesh 22. The sieve hole diameter of the second-layer sieve mesh is 11 mm. The milled materials larger than 11 mm enter the first discharge port 24 after vibration screening, and the RAP materials with a particle size range of 10 - 26.5 mm are obtained through the first-stage RAP material conveying channel 42. The milled materials smaller than 11 mm enter the third-layer sieve mesh 23. The sieve hole diameter of the third-layer sieve mesh is 7 mm. The milled materials larger than 7 mm enter the second discharge port 25 after vibration screening, and the RAP materials with a particle size range of 5 - 10 mm are obtained through the second-stage RAP material conveying channel 43. The milled materials smaller than 7 mm enter the third discharge port 26 through the sieve mesh, and the RAP materials with a particle size range of 0 - 5 mm are obtained through the third-stage RAP material conveying channel 44.

[0026] The milled materials larger than 31 mm enter the crushing device 3 after primary vibration screening. The crushing device 3 adopts a double-tooth roll crusher with high crushing efficiency. The double-tooth rolls are rotated by an electric motor to squeeze and crush the materials between the double-tooth rolls, and then the materials are discharged from the crushing discharge port 33. After discharging, they fall onto the crushed milled material conveying channel 45. The crushed milled material conveying channel 45 re-transmits them into the circulating transmission device, conveys them to the sorting device, and further sorts them to realize the circulating screening of the milled materials.

[0027] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the patent and protection scope of the present utility model shall be subject to the appended claims.

Claims

1. A circulating crushing and screening device for milling materials, characterized in that: It includes a circulating transmission device, a sorting device and a crushing device. The circulating transmission device is used to transmit the milling material to the sorting device. The sorting device is used to screen the transmitted milling material and transmit the unqualified material to the crushing device for crushing. The crushing device is used to transmit the crushed material back to the circulating device. The sorting device comprises a first screening element, a second screening element and a third screening element. The first screening element is connected to a crushing device. The aperture of the first screening element is larger than that of the second screening element. The aperture of the second screening element is larger than that of the third screening element.

2. A cyclic crushing and screening device for milling material according to claim 1, characterized in that: The circulating transmission device includes a loading piece, a milling material conveying channel, and a crushed milling material conveying channel. The loading piece is located above one side of the milling material conveying channel, and the other side of the milling material conveying channel is located above the first screening piece. The crushing device is located on one side of the crushed milling material conveying channel, and the other side of the crushed milling material conveying channel is connected to the milling material conveying channel.

3. A cyclic crushing and screening device for milling material according to claim 2, characterized in that: The loading piece is vertically located on the milling material conveying channel, and comprises a milling material loading bin and a milling material discharge port. One end of the milling material discharge port is connected to the milling material loading bin and the other end is located above the milling material conveying channel.

4. A cyclic crushing and screening device for milling material according to claim 1, characterized in that: The first screening component includes a first layer of screen and a milling material crushing feeding channel, one end of the milling material crushing feeding channel is connected to the first layer of screen and the other end is connected to the crushing device, and the height of the milling material crushing feeding channel is lower than or equal to the height of the first layer of screen.

5. A cyclic crushing and screening device for milling material according to claim 4, characterized in that: The second screening element comprises a second layer of screen and a first discharge port, the second layer of screen is inclined, and the first discharge port is connected to the lowest end of the second layer of screen.

6. A cyclic crushing and screening device for milling material according to claim 5, characterized in that: The second screening element includes a third layer of screen, a second discharge port and a third discharge port. The third layer of screen is inclined, the second discharge port is connected to the lowest end of the third layer of screen, and the third discharge port is sealedly connected to the third layer of screen and is located below the third layer of screen.

7. A cyclic crushing and screening device for milling material according to claim 6, characterized in that: A first-stage RAP material conveying channel is arranged below the first discharge port, a second-stage RAP material conveying channel is arranged below the second discharge port, and a third-stage RAP material conveying channel is arranged below the third discharge port.

8. A cyclic crushing and screening device for milling material according to claim 1, characterized in that: The crushing device comprises a double-toothed roller crushing device and a crushing discharge port, the milling material crushing feeding channel is connected to the double-toothed roller crushing device, and the discharge port is located above the crushing milling material transmission channel.

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