CN211359172U

CN211359172U - Experimental device for silt in bituminous paving reclaimed materials is handled in rotatory flotation

Info

Publication number: CN211359172U
Application number: CN201920980405.4U
Authority: CN
Inventors: 毛鑫勃; 张瑜; 战琦琦; 吴涛
Original assignee: Chongqing Zonjo Renewable Resources Development Co ltd
Current assignee: Chongqing Zonjo Renewable Resources Development Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-08-28
Anticipated expiration: 2029-06-24

Abstract

The utility model discloses an experimental device of silt in rotatory flotation treatment bituminous paving reclaimed materials, its mainly used reduces the silt that bituminous paving reclaimed materials the inside was mingled with among the hot regeneration bituminous mixture of plantmix to improve the regularity and the mechanical properties on shaping road surface that paves. This test device is on the basis of through welding steel sheet and roll-up steel pipe, through increasing the motor, the screen cloth, a controller, stirring rod spare, the water tank, dry rotary drum, water pump and sedimentation tank connect the feed bin and pass through the belt and advance discharge gate, at first through control velocity of water, make the buoyancy of silt in aqueous can be balanced mutually with gravity, the RAP material sinks, RAP material and silt separation under the rotation effect of rivers, secondly, through increasing rivers rising speed, silt passes through the pipeline under the effect of suction filtration and pump suction and flows out from the top, and RAP material sinks under the action of gravity to dry rotatory dry 600s in the dry drum that the accuse temperature is 105 ℃, finally pass through the belt with RAP material again and transmit to the feed bin. This rotary flotation silt experimental apparatus can take out the silt in the RAP material well for the RAP material has better mechanical properties when mixing with new material or thermal recycling.

Description

Experimental device for silt in bituminous paving reclaimed materials is handled in rotatory flotation

Technical Field

The utility model belongs to road machinery, specific saying relates to a flotation is clear away silt test device in bituminous paving reclaimed materials.

Background

A large amount of asphalt is needed in road construction, the yield of crude oil is reduced, and resources are greatly consumed, so that the yield of new asphalt is reduced; meanwhile, a large amount of RAP materials are generated in road renovation, the reclaimed materials contain a considerable part of asphalt and stone materials with good gradation, the RAP materials are crushed, recycled and reused, and the design indexes of the asphalt pavement can be reached through experiments and construction control, so that not only can resources be effectively saved, but also waste resources are reused.

Theoretically, RAP materials can be recycled through plant-mixed hot recycling, in-situ hot recycling, warm-mixed recycling and cold recycling, and are added into new materials according to a certain proportion through construction control, and the mechanical property of a paved and compacted pavement structure is equivalent to that of a pavement structure paved by the new materials. However, a considerable part of silt is added in the process of recovering the RAP material, the interface fusion between the old and new asphalts and the regenerating agent and the adhesion between the aggregates and the asphalt are seriously influenced by the existence of the silt, and even when the content of the silt is large, the bonding strength between the asphalt and the aggregates is reduced by more than 50%, so that the mechanical property of the pavement and the chemical adhesion between the asphalt and stone are greatly influenced. Therefore, the mixing amount of the RAP material and the mechanical property of the paved road surface can be improved only by effectively treating the silt in the RAP material.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is realized through such technical scheme: the utility model provides an experimental apparatus for silt in bituminous paving reclaimed materials is handled in rotatory flotation, on welding steel sheet and roll-up steel pipe basis, increase the motor, the screen cloth, a controller, the stirring rod piece, the water tank, dry rotary drum, feed bin and business turn over material mouth are connected through the belt to water pump and sedimentation tank, through controlling rivers speed, make the buoyancy of silt in aqueous can be balanced mutually with gravity, the RAP material sinks, RAP material and silt separation under the rotation of rivers, the rethread increases rivers rising speed, silt flows out from the top through the pipeline, and the RAP material sinks to dry in the drying cylinder under the action of gravity and removes moisture.

Further, the outer size of the cylinder is 5000mm × 8000mm with diameter × height; the inner size of the cylinder is 4500mm × 8000mm in diameter × height, and the inner and outer wall thickness of the cylinder is 20 mm.

Further, it mainly eliminates the dust that produces when RAP material is transported to the barrel through the belt from the feed bin and is emptyd, and water smoke injection volume is 40L/min, and the shower nozzle is apart from 1000mm in barrel top surface.

Further, the spray head is 1000mm away from the top surface of the cylinder body.

Furthermore, the sieve plate is 7900mm in size diameter, 50mm in thickness and forged in an arch shape, so that the rigidity of the vertical surface is increased.

Furthermore, the arch height of the sieve plate is at least 5% of the diameter and is not less than 1.3 times of the thickness of the sieve plate, and the arch height of the sieve plate both meet the requirement.

Further, the flow velocity of the water flow is rho_Siltgv_{Volume per unit of water discharged}＜F＜ρ_{Old aggregate}gv_{Volume per unit of water discharged}And the unit displacement volume is the displacement volume of silt and old aggregate in water of every kilogram, the buoyancy of silt and old aggregate can be calculated, and the value of the flow velocity of water is carried out through two buoyancy (F and the flow velocity are combined together according to hydromechanics to solve the size of water flow, namely F-m_Silt×a＝m_Silt×(v-v₀At), where v is the final set water flow rate, v₀The initial flow rate is 0, and Δ t is the time when the water flow rate increases to the set flow rate.

Due to the adoption of the technical scheme, the utility model discloses following advantage has:

this kind of experimental apparatus for silt in bituminous paving reclaimed materials is handled in rotatory flotation can effectively clear away silt through the control flow velocity of flow, and the water above the sediment water recovery after deposiing can cyclic utilization, and the sediment deposits can be used for preparing building materials such as bricks, not only clean RAP material, reaches water cyclic utilization simultaneously and deposits the reuse of silt, reduces environmental pollution.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:

figure 1 is the utility model discloses an experimental apparatus for silt in bituminous paving reclaimed materials is handled in rotatory flotation.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings; it should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.

As shown in figure 1, the experimental device for treating the silt in the reclaimed materials of the asphalt pavement through rotary flotation mainly comprises the following structures: the sand-removing device is characterized in that the sand-removing device is conveyed into a rolling steel cylinder body 3 (through an unprocessed RAP material bin) 1 for processing, 12 (a water spray spraying device) and 13 (a water feeding pipeline) are added on the rolling steel cylinder body 3 (through a controllable high-pressure water pump and a water inlet pipeline) and 18 (a water tank) for pumping water, the water flow direction is 10 (water flow direction) to remove dust and raised sand generated by adding RAP materials into the cylinder body, and meanwhile, 11 (a sieve plate device) is arranged to distinguish RAP materials with different particle sizes, so that the sand and sand are removed more effectively; 3, arranging 8 (heating net) and 14 (silt drainage pipe) at the middle part of the steel coil cylinder body, enabling water in the 14 (silt drainage pipe) to flow into a 15 (sedimentation tank) to control the water flow temperature, enabling silt to be removed more effectively, additionally arranging 7 (rotating main shaft), welding 6 (blades) and additionally arranging 9 (controlling water flow vortex net) to enable RAP to be effectively separated from silt under the actions of mechanical stirring and rotating blade cutting; 3 (the steel coil cylinder body) is mainly provided with 5 (a sealing plate structure), 17 (a controllable high-pressure water pump and a water inlet pipeline) and 19 (a cylinder body residual water drainage pipeline), so that water flow is kept in the cylinder body, and water in the cylinder body is discharged after silt treatment is finished; and 4 (drying cylinder) and 16 (plate pore channel) are additionally arranged, so that the treated RAP material can flow into the drying cylinder to effectively remove water, and finally the RAP material subjected to rotary flotation treatment flows into a 2 (clean accumulation bin) to prepare for subsequent production.

If the device is used in summer, the device does not need to be opened 8 (a cylinder wall heating net); when the barrel is used in winter, the heating jacket can be opened due to the agglomeration of RAP, particularly in northern severe cold areas, the power of the heating jacket is 5000W, the barrel can be heated for about 1 hour according to the heat balance theory, the water temperature in the barrel can be kept at about 20 ℃ from minus 5 ℃, and meanwhile, the de-frozen RAP can be effectively dispersed under the action of the blades, so that the barrel is beneficial to removing silt.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an experimental apparatus for silt in bituminous paving reclaimed materials is handled in rotatory flotation which characterized in that: a water mist spraying device (12) is additionally arranged on the steel coil cylinder body to remove dust and raised sand generated by adding RAP materials into the cylinder body, and a sieve plate device (11) is arranged to distinguish the RAP materials with different particle sizes, so that the sand and sand removal is more effective; a heating net (8) and a silt water discharge pipeline (14) are arranged on the wall of the cylinder in the middle of the cylinder, the temperature of water flow is controlled, silt is removed more effectively, a rotating main shaft (7) is additionally arranged, and an upper blade (6) is welded, so that RAP is effectively separated from silt under the actions of mechanical stirring and cutting of the rotating blade; the lower part of the cylinder body is mainly provided with a sealing plate structure (5), a water inlet pipeline (17) and a cylinder body residual water drainage pipeline (19) to keep water flow in the cylinder body, and simultaneously, water in the cylinder body is discharged after silt treatment is finished; and meanwhile, a drying cylinder (4) and a plate hole channel (16) are additionally arranged, so that the treated RAP material can circulate to the drying cylinder to effectively remove moisture.

2. The experimental facility for treating silt in recycled asphalt pavement material by rotary flotation according to claim 1, characterized in that: the cylinder body is made of 304 stainless steel, and the outer size of the cylinder body is 5000mm multiplied by 8000mm in diameter multiplied by height; the inner size of the cylinder is 4500mm × 8000mm in diameter × height, the wall thickness of the cylinder is 20mm, and a filling heating net is arranged between the inner wall and the outer wall.

3. The experimental facility for treating silt in recycled asphalt pavement material by rotary flotation according to claim 2, characterized in that: the water spray amount of the water spray spraying device is 40L/min, and the water spray spraying device is arranged 1000mm above the top of the cylinder body.

4. The experimental facility for treating silt in reclaimed asphalt pavement by rotary flotation according to claim 3, characterized in that: the nominal aperture of the sieve plate device is 5mm, 10mm and 20mm, the diameter of the sieve plate is 7900mm, the thickness of the sieve plate is 50mm, the sieve plate is arched by forging, the vertical rigidity is increased, and the RAP material is resisted by the gravity, so that the RAP material is subjected to overlarge bending deformation and is 2000mm away from the top of the cylinder.

5. The experimental facility for treating silt in recycled asphalt pavement material by rotary flotation according to claim 4, wherein: the filling heating net is mainly used for heating water flow in the cylinder body, so that the reclaimed materials are not frozen and agglomerated in winter or in seasons with lower air temperature, silt is effectively removed, and the heating power is 5000W; the distance between the drainage pipeline and the top screen plate is 300mm, and the pipeline size is that the diameter is multiplied by the wall thickness is 250mm multiplied by 10 mm.

6. The experimental facility for treating silt in recycled asphalt pavement material by rotary flotation according to claim 5, characterized in that: the size of the rotating main shaft is 100mm multiplied by 8000mm in diameter multiplied by height, the size of the blade is a steel pipe, the diameter multiplied by wall thickness is 20mm multiplied by 2mm, the rotating speed of the main shaft is controlled by a motor, and the controllable rotating speed interval is 0-10000 r/min.

7. The experimental facility for treating silt in recycled asphalt pavement material by rotary flotation according to claim 6, characterized in that: the size of the sealing plate structure is 8000mm multiplied by 50mm with the diameter multiplied by the height multiplied by 8000mm, and the sealing plate structure is welded with the cylinder body and is 1000mm away from the cylinder bottom; the distance between the water inlet pipeline and the bottom sealing plate is 500mm, and the size of the pipeline is that the diameter multiplied by the wall thickness is 250mm multiplied by 10 mm; the distance between the drainage pipeline and the bottom plate is 100mm, and the size of the pipeline is that the diameter multiplied by the wall thickness is 250mm multiplied by 10 mm.

8. The experimental facility for treating silt in recycled asphalt pavement material by rotary flotation according to claim 7, characterized in that: the diameter of the drying cylinder is 1000mm, the length of the drying cylinder is 3000mm, the rotation rate is 0-2000r/min, the drying cylinder is connected with the plate hole channel, the diameter of the plate hole channel is 300mm, the valve is additionally arranged to keep water flow not to pass through in the silt treatment process, the valve is opened after silt treatment is finished, and RAP enters the drying cylinder through the plate hole channel.