A pavement asphalt recycling material fine separation device and method

Abstract

The present application relates to a kind of road surface asphalt recycling material fine separation equipment and method, belong to crushing equipment technical field, including laminated frame and sequentially connected raw material bin, pretreatment linear vibrating screen, pretreatment flexible pair of roller crusher, vertical shaft type stripping machine, first linear vibrating screen and second high-frequency probability screen, pretreatment flexible pair of roller crusher includes crusher body, two crushing rollers, two flexible material gathering devices and two reverse pushing devices, two crushing rollers are rotatably installed on the crusher body, two flexible material gathering devices are installed in the crusher body, two flexible material gathering devices are rotatably installed on corresponding crushing roller, reverse pushing device is installed on the crusher body, and reverse pushing device is drivingly connected with corresponding flexible material gathering device, and reverse pushing device includes reverse pushing cylinder, reverse pushing piston and reverse pushing air pump, reverse pushing air pump is communicated with reverse pushing cylinder, reverse pushing cylinder is provided with air vent, reverse pushing piston slides in reverse pushing cylinder, reverse pushing piston pushes against flexible material gathering device, and crushing efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt crushing, in particular to a pavement asphalt recycling material fine separation equipment and method. BACKGROUND

[0002] With the rapid development of highway construction in recent decades, a large number of pavements have entered the reconstruction and renovation stage. The old road asphalt pavement materials need to be recycled and utilized through reasonable ways, which can save a large amount of construction material cost, effectively avoid material waste and environmental pollution. Currently, the commonly used way is to use the recycled asphalt old to enter the low-grade screening system after being hit by the counterattack or hammer crushing type. This relatively extensive beating method cannot finely separate the raw materials, and the separation efficiency is not high. SUMMARY

[0003] In order to overcome the technical defects existing in the prior art, the present application provides a pavement asphalt recycling material fine separation equipment and method, which has high crushing efficiency.

[0004] The technical solution adopted by the present application is:

[0005] The application discloses a pavement asphalt recycling material fine separation equipment, which comprises a laminated frame and sequentially connected raw material bin, pretreatment linear vibration screen, pretreatment flexible pair of roller crusher, vertical shaft type stripping machine, first-stage linear vibration screen and second-stage high-frequency probability screen, wherein the vertical shaft type stripping machine, the first-stage linear vibration screen and the second-stage high-frequency probability screen are all installed on the laminated frame, a pulse bag-type dust collector is also installed on the laminated frame, the pulse bag-type dust collector is communicated with the inlet of the vertical shaft type stripping machine and the outlet of the vertical shaft type stripping machine through dust suction pipelines, the pretreatment flexible pair of roller crusher comprises a crusher body, two crushing rollers, two flexible material gathering devices and two reverse pushing devices, the two crushing rollers are rotatably installed on the crusher body, the two flexible material gathering devices are installed in the crusher body, the two flexible material gathering devices are oppositely arranged and rotatably installed on the corresponding crushing rollers, the reverse pushing device is installed on the crusher body and is in transmission connection with the corresponding flexible material gathering device, the reverse pushing device comprises a reverse pushing cylinder, a reverse pushing piston and a reverse pushing air pump, the reverse pushing air pump is communicated with the reverse pushing cylinder, the reverse pushing cylinder is provided with a gas leakage hole, the reverse pushing piston slides in the reverse pushing cylinder, the reverse pushing piston abuts against the flexible material gathering device, the flexible material gathering device is provided with a gas injection chamber which is communicated with the side of the reverse pushing cylinder away from the material gathering shell body, a gas releasing device is slidably arranged at the position close to the inner side of the crusher body of the gas injection chamber, the gas releasing device comprises a gas releasing plate, a gas releasing sliding pipe and a gas releasing nozzle, the gas releasing sliding pipe slides along the side wall of the gas injection chamber, the gas releasing nozzle is slidably installed on the gas releasing sliding pipe, the gas releasing nozzle is slidably arranged on the gas releasing sliding pipe, and the gas releasing nozzle is used for opening and closing the gas releasing sliding pipe when sliding along the gas releasing sliding pipe, the gas releasing nozzle is located in the gas injection chamber, the gas releasing nozzle is closed when the gas releasing plate is pressed, the gas releasing sliding pipe and the gas releasing nozzle are closed, the gas releasing plate is fixedly connected to the position of the gas releasing sliding pipe away from the gas injection chamber, and a reset compression spring is arranged between the gas releasing plate and the gas injection chamber.

[0006] Preferably, the raw material bin is provided with a plurality of shock-absorbing pads at the bottom, and the raw material bin is provided with a vibration motor.

[0007] Preferably, the raw material bin and the pretreatment linear vibration screen are communicated through a feeding belt conveyor.

[0008] Preferably, the feeding belt conveyor is provided with a magnet belt machine on the upper side.

[0009] Preferably, the pretreatment flexible pair of roller crusher is provided with a feeding belt conveyor on the lower side, the feeding belt conveyor is communicated with an aggregate elevator, and the aggregate elevator is communicated with the vertical shaft type stripping machine.

[0010] Preferably, the second-stage high-frequency probability screen is provided with a finished product belt conveyor and an out-of-limit material belt conveyor on the lower side.

[0011] Preferably, the flexible material gathering device comprises a material gathering shell and a material gathering ring, the material gathering shell is installed on the crushing roller through the material gathering ring, the inner diameter of the material gathering ring is larger than the outer diameter of the crushing roller, the material gathering ring covers the crushing roller, and the material gathering ring forms an optimal arc outside the crushing roller, so that the material gathering ring has an opening at the position where the crushing rollers are close to each other.

[0012] The pavement asphalt recycling material fine separation method uses a pavement asphalt recycling material fine separation device, and comprises the following steps:

[0013] S1: the raw material bin is vibrated to accelerate the falling of materials;

[0014] S2: the materials in the raw material bin are conveyed to a pretreatment linear vibrating screen for coarse screening;

[0015] S3: the pretreatment linear vibrating screen pre-screens the raw materials, and large particles in the materials are screened and then enter a pretreatment flexible pair roller crusher;

[0016] S4: the pretreatment flexible pair roller crusher rubs and crushes the large particles, a counter-pushing air pump drives a counter-pushing piston to slide in a counter-pushing cylinder, and a flexible material gathering device is opened and closed to promote the falling of materials;

[0017] S5: the vertical shaft type stripping machine adopts a vertical shaft impact crusher as the body, materials enter the center of the rotor, are thrown out by high-speed rotation and hit on a specially-made anvil for asphalt stripping, and the stripped materials enter a first-stage linear vibrating screen;

[0018] S6: a second-stage high-frequency probability screen continuously moves materials in a parabolic manner on the screen to achieve the screening of fine materials;

[0019] S7: a pulse type bag type dust collector is connected with the inlet of the vertical shaft type stripping machine and the outlet of the vertical shaft type stripping machine through a dust suction pipeline, so that dust emission and recovery can be effectively controlled.

[0020] The pavement asphalt recycling material fine separation method has the following beneficial effects:

[0021] The laminated frame is also provided with a pulse bag type dust collector, which is communicated with the inlet of the vertical shaft stripping machine and the outlet of the vertical shaft stripping machine through a dust suction pipeline to realize dust removal.

[0022] The reverse pushing device is installed on the crusher body and is in transmission connection with the corresponding flexible material gathering device, and the reverse pushing device comprises a reverse pushing cylinder, a reverse pushing piston and a reverse pushing air pump. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the present application.

[0024] Figure 2 It is a structural schematic view of the present application.

[0025] Figure 3 It is a structural schematic view of the present application.

[0026] Figure 4 It is a structural sectional view of the present application.

[0027] Figure 5 It is a structural sectional view of the present application. Figure 4

[0028] Figure 6 It is a structural sectional view of the present application.

[0029] ​Figure 7 For Figure 6 Enlarged view of the middle B.

[0030] Reference signs:

[0031] 1, raw material bin;

[0032] 2, pretreatment linear vibrating screen;

[0033] 3, pretreatment flexible pair of roll crusher; 31, crusher body; 32, crushing roll; 33, flexible material gathering device; 331, material gathering shell; 3311, gas injection chamber; 332, material gathering ring; 333, air release device; 3331, air release plate; 3332, air release slide pipe; 3333, air release nozzle; 3334, reset compression spring; 34, reverse thrust device; 341, reverse thrust cylinder; 3411, air release hole; 342, reverse thrust piston;

[0034] 4, vertical shaft peeling machine;

[0035] 5, first-stage linear vibrating screen;

[0036] 6, second-stage high-frequency probability screen;

[0037] 7, pulse bag-type dust collector;

[0038] 8, feeding belt conveyor;

[0039] 9, magnet belt conveyor;

[0040] 10, feeding belt conveyor;

[0041] 11, finished product belt conveyor;

[0042] 12, over-limit material belt conveyor. DETAILED DESCRIPTION

[0043] The present application will be further described below in conjunction with the accompanying drawings:

[0044] As Figure 1 — Figure 7As shown, the embodiment provides a pavement asphalt recycling material fine separation equipment, which comprises a laminated frame and sequentially connected raw material bin 1, pretreatment linear vibrating screen 2, pretreatment flexible pair of roller crusher 3, vertical shaft stripping machine 4, first linear vibrating screen 5 and second high-frequency probability screen 6, the vertical shaft stripping machine 4, the first linear vibrating screen 5 and the second high-frequency probability screen 6 are all installed on the laminated frame, and a pulse bag-type dust collector 7 is also installed on the laminated frame, the pulse bag-type dust collector 7 is communicated with the inlet of the vertical shaft stripping machine 4 and the outlet of the vertical shaft stripping machine 4 through a dust suction pipeline, dust removal is realized, the pretreatment flexible pair of roller crusher 3 comprises a crusher body 31, two crushing rollers 32, two flexible material gathering devices 33 and two reverse pushing devices 34, the two crushing rollers 32 are rotatably installed on the crusher body 31, and materials are crushed by the two crushing rollers 32 when passing between the two crushing rollers 32, the two flexible material gathering devices 33 are installed in the crusher body 31, the two flexible material gathering devices 33 are oppositely arranged, and the two flexible material gathering devices 33 are rotatably installed on the corresponding crushing rollers 32, the general principle of the application is that in the area where the material is more, the two flexible material gathering devices 33 in the relative position are close to each other, the opening degree is reduced, the material is pushed to the area where the material is less around, the amount of material at each position of the crushing roller 32 is averaged, the loss degree of each position of the crushing roller 32 is averaged, the crushing roller 32 is prevented from being damaged due to long-term concentration of the material, in the area where the material is less, the two flexible material gathering devices 33 in the relative position are far away from each other, the opening degree is increased, the material flows in, and the processing capacity is improved, since the flexible material gathering device 33 has the function of averaging the material, the service life of the equipment is improved, and the impact is reduced.

[0045] The reverse pushing device 34 is installed on the crusher body 31, the reverse pushing device 34 is in transmission connection with the corresponding flexible material gathering device 33, the reverse pushing device 34 comprises a reverse pushing cylinder 341, a reverse pushing piston 342 and a reverse pushing air pump, the reverse pushing air pump is communicated with the reverse pushing cylinder 341, the reverse pushing cylinder 341 is provided with a gas leakage hole 3411, the gas leakage hole 3411 limits the angle of rotation of the flexible material gathering device 33, prevents the two flexible material gathering devices 33 from being too close to each other, facilitates the flexible material gathering device 33 to maintain an inclined state and realize resetting under the action of gravity, the reverse pushing piston 342 slides in the reverse pushing cylinder 341, the reverse pushing piston 342 pushes against the flexible material gathering device 33, after the reverse pushing air pump supplies air, the reverse pushing piston 342 reciprocates in the reverse pushing cylinder 341, realizes the reciprocating approach of the two flexible material gathering devices 33, facilitates the descending and crushing of the asphalt block, and the crushing efficiency is high.

[0046] Specifically, the raw material bin 1 is provided with a plurality of shock pads at the bottom, and the raw material bin 1 is provided with a vibrating motor to realize the rapid descending of the asphalt material.

[0047] Specifically, the raw material bin 1 and the pretreatment linear vibrating screen 2 are communicated through the feeding belt conveyor 8 to realize the conveying of the asphalt material.

[0048] Specifically, the upper side of the feeding belt conveyor 8 is provided with a magnet belt conveyor 9 to realize iron removal.

[0049] Specifically, the lower side of the pretreatment flexible pair roller crusher 3 is provided with a feeding belt conveyor 10, which is communicated with an aggregate elevator, the aggregate elevator is communicated with a vertical shaft stripping machine 4, after the material enters the center of the rotor, the high-speed rotation will throw the material on the specially-made anvil to perform asphalt stripping, which is the prior art and will not be described here, the stripped material enters the first linear vibrating screen 5.

[0050] Specifically, the lower side of the second high-frequency probability screen 6 is provided with a finished product belt conveyor 11 and an out-of-gauge material belt conveyor 12 to realize the conveying of finished product materials.

[0051] Specifically, the flexible material gathering device 33 includes a material gathering shell 331 and a material gathering ring 332, the material gathering shell 331 is installed on the crushing roller 32 through the material gathering ring 332, the inner diameter of the material gathering ring 332 is greater than the outer diameter of the crushing roller 32, the material gathering ring 332 covers the crushing roller 32, the material gathering ring 332 forms an optimal arc outside the crushing roller 32, so that the material gathering ring 332 has an opening at the position where the crushing rollers 32 are close to each other, which is convenient for the rotation of the flexible material gathering device 33, and also prevents the material gathering ring 332 from being damaged when crushing the material by extrusion, when the reverse thrust piston 342 retreats, the material gathering shell 331 rotates under the action of gravity.

[0052] In order to control the flexible material gathering device 33 to reduce the opening at the location of the accumulated material, prevent accumulation, the material gathering shell 331 is provided with a gas injection chamber 3311 communicated with the anti-push cylinder 341 away from the material gathering shell 331 side, a gas release device 333 is slidably arranged at the position close to the inner side of the crusher body 31 of the gas injection chamber 3311, the gas release device 333 includes a gas release plate 3331, a gas release sliding pipe 3332 and a gas release nozzle 3333, the gas release sliding pipe 3332 slides along the side wall of the gas injection chamber 3311, the gas release nozzle 3333 is slidably mounted on the gas release sliding pipe 3332, in order to realize the reset of the gas release nozzle 3333, a nozzle reset spring is arranged between the gas release nozzle 3333 and the gas release sliding pipe 3332, the gas release nozzle 3333 slides along the gas release sliding pipe 3332 to realize the opening and closing of the gas release sliding pipe 3332, the gas release nozzle 3333 is located in the gas injection chamber 3311, the gas release nozzle 3333 is closed when the gas release plate 3331 is pressed, the gas release sliding pipe 3332 and the gas release nozzle 3333 are closed, the gas release plate 3331 is fixedly connected to the position away from the gas injection chamber 3311 of the gas release sliding pipe 3332, a reset compression spring 3334 is arranged between the gas release plate 3331 and the gas injection chamber 3311, when the material is accumulated at the position of the material gathering shell 331, the gas release plate 3331 is pressed and slides along the material gathering shell 331, so that the passage between the gas release nozzle 3333 and the gas release sliding pipe 3332 is blocked, the anti-push cylinder 341 is kept, the anti-push piston 342 is pushed out, the two material gathering shells 331 are close to each other, which is convenient for pushing the material to the two sides of the material gathering shell 331 when the material is accumulated, when the material is less, the reset compression spring 3334 pushes the gas release plate 3331 to reset, the passage between the gas release nozzle 3333 and the gas release sliding pipe 3332 is opened, the gas pressure away from the material gathering shell 331 side of the anti-push cylinder 341 is reduced, so that the anti-push piston 342 is retracted, the two material gathering shells 331 are away from each other, which is convenient for the material to flow in and average the wear of the crushing roller 32.

[0053] The method for fine separation of road asphalt recycling material uses a road asphalt recycling material fine separation device, and includes the following steps:

[0054] S1: The raw material bin 1 accelerates the material falling by vibration;

[0055] S2: The material in the raw material bin 1 is conveyed to the pretreatment linear vibrating screen 2 for coarse screening, where the coarse screening refers to the primary screening in the process;

[0056] S3: The pretreatment linear vibrating screen 2 performs pretreatment screening on the raw material, and the material with large particle size is screened and then enters the pretreatment flexible pair roller crusher 3, where the large particle size refers to the material that has not been crushed;

[0057] S4: the flexible pair of roll crusher 3 is pretreated, large particle size is rubbed and broken and separated, the reverse push air pump drives the reverse push piston 342 to slide in the reverse push cylinder 341, the flexible material gathering device 33 is opened and closed, and material falling is promoted;

[0058] S5: the vertical shaft type stripping machine 4 adopts a vertical shaft impact crusher as the body, material enters from the center of the rotor, is thrown out by high-speed rotation and is beaten on a specially-made anvil to strip asphalt, and the stripped material enters the first linear vibrating screen 5;

[0059] S6: the second high-frequency probability screen 6 continuously makes parabolic motion on the screen to achieve the required fine material screening, and the fine material here refers to the finished material;

[0060] S7: the pulse type bag type dust collector 7 is connected with the inlet of the vertical shaft type stripping machine 4 and the outlet of the vertical shaft type stripping machine 4 through a dust suction pipeline, effectively controls dust emission and recovery.

[0061] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and those skilled in the art should understand that the present application is not limited to the above examples, the above examples and the description in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application, the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An apparatus for fine separation of road asphalt recyclates, characterized in that The application relates to a material preparation system, which comprises a laminated frame and sequentially connected raw material storage, pretreatment linear vibration screen, pretreatment flexible pair-roller crusher, vertical shaft type stripping machine, first-stage linear vibration screen and second-stage high-frequency probability screen, wherein the vertical shaft type stripping machine, the first-stage linear vibration screen and the second-stage high-frequency probability screen are all installed on the laminated frame, a pulse bag-type dust collector is also installed on the laminated frame, the pulse bag-type dust collector is communicated with the inlet of the vertical shaft type stripping machine and the outlet of the vertical shaft type stripping machine through dust suction pipelines, the pretreatment flexible pair-roller crusher comprises a crusher body, two crushing rollers, two flexible material gathering devices and two reverse pushing devices, the two crushing rollers are rotatably installed on the crusher body, the two flexible material gathering devices are installed in the crusher body, the two flexible material gathering devices are oppositely arranged and rotatably installed on the corresponding crushing rollers, the reverse pushing device is installed on the crusher body and is in transmission connection with the corresponding flexible material gathering device, the reverse pushing device comprises a reverse pushing cylinder, a reverse pushing piston and a reverse pushing air pump, the reverse pushing air pump is communicated with the reverse pushing cylinder, the reverse pushing cylinder is provided with a gas leakage hole, the reverse pushing piston slides in the reverse pushing cylinder, the reverse pushing piston pushes against the flexible material gathering device, the flexible material gathering device is provided with a gas injection chamber which is communicated with the side of the reverse pushing cylinder away from the material gathering shell, a gas releasing device is slidably arranged at the position close to the inner side of the crusher body of the gas injection chamber, the gas releasing device comprises a gas releasing plate, a gas releasing sliding pipe and a gas releasing nozzle, the gas releasing sliding pipe slides along the side wall of the gas injection chamber, the gas releasing nozzle is slidably installed on the gas releasing sliding pipe, a nozzle reset spring is arranged between the gas releasing nozzle and the gas releasing sliding pipe, the gas releasing nozzle slides along the gas releasing sliding pipe to realize opening and closing of the gas releasing sliding pipe, the gas releasing nozzle is located in the gas injection chamber, the gas releasing nozzle is closed when the gas releasing plate is pressed, the gas releasing sliding pipe and the gas releasing nozzle are closed, the gas releasing plate is fixedly connected to the position of the gas releasing sliding pipe away from the gas injection chamber, a reset compression spring is arranged between the gas releasing plate and the gas injection chamber, when material is accumulated at the position of the material gathering shell, the gas releasing plate slides along the material gathering shell and is pressed down, the channel between the gas releasing nozzle and the gas releasing sliding pipe is blocked, the reverse pushing cylinder is kept pressure, the reverse pushing piston is pushed out, the two material gathering shells are close to each other, so that the material is pushed to the two sides of the material gathering shell when the material is accumulated, the reset compression spring pushes the gas releasing plate to reset, the channel between the gas releasing nozzle and the gas releasing sliding pipe is opened, the pressure of the side of the reverse pushing cylinder away from the material gathering shell is reduced, the reverse pushing piston is retracted, and the two material gathering shells are far away from each other, so that the material flows in and the wear of the crushing rollers is averaged.

2. The fine separation apparatus for road asphalt recycling material according to claim 1, characterized in that, The raw material storage is provided with a plurality of shock-absorbing pads at the bottom.

3. The fine separation apparatus for road asphalt recycling material according to claim 1, characterized in that, The raw material storage is provided with a vibration motor.

4. The fine separation apparatus for road asphalt recycling material according to claim 3, characterized in that, The raw material storage and the pretreatment linear vibration screen are communicated through an upper feeding belt conveyor.

5. The fine separation apparatus for road asphalt recycling material according to claim 1, characterized in that, The upper feeding belt conveyor is provided with a magnet belt machine on the upper side. The lower side of the pretreatment flexible pair-roller crusher is provided with a feeding belt conveyor, the feeding belt conveyor is communicated with an aggregate elevator, and the aggregate elevator is communicated with the vertical shaft type stripping machine.

6. The fine separation apparatus for road asphalt recycling material according to claim 1, characterized in that, The secondary high-frequency probability screen is provided with a finished product belt conveyor and an out-of-limit material belt conveyor on the lower side.

7. The fine separation apparatus for road asphalt recycling material according to claim 1, characterized in that, The flexible material gathering device comprises a material gathering shell and a material gathering ring, the material gathering shell is installed on the crushing roller through the material gathering ring, the inner diameter of the material gathering ring is larger than the outer diameter of the crushing roller, the material gathering ring covers the crushing roller, and the material gathering ring forms an optimal arc outside the crushing roller, so that the material gathering ring has an opening at the position where the crushing rollers are close to each other.

8. A method for fine separation of road asphalt recyclates using a road asphalt recyclate fine separation device according to claim 1, characterized in that, The method comprises the following steps: S1: the raw material bin is accelerated by vibration to speed up the falling of the material; S2: the material in the raw material bin is conveyed to the pretreatment linear vibrating screen for coarse screening; S3: the pretreatment linear vibrating screen performs pre-screening treatment on the raw material, and large particles in the material are screened and then enter the pretreatment flexible pair-roller crusher; S4: the pretreatment flexible pair-roller crusher performs rubbing and crushing separation on the large particles, a reverse thrust air pump drives a reverse thrust piston to slide in a reverse thrust cylinder, and a flexible material gathering device is opened and closed to promote the falling of the material; S5: the vertical shaft type stripping machine adopts a vertical shaft impact crusher as the body, after the material enters from the center of the rotor, the material is thrown out and hit on a specially-made anvil to strip asphalt at high speed, and the stripped material enters the first-stage linear vibrating screen; S6: the secondary high-frequency probability screen continuously performs parabolic motion on the screen to achieve the screening of fine materials; S7: the pulse bag-type dust collector is connected to the inlet of the vertical shaft type stripping machine and the outlet of the vertical shaft type stripping machine through a dust suction pipeline, so as to effectively control the emission and recovery of dust.

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