CN114146755B - Asphalt mixture aggregate crushing multistage screening equipment - Google Patents

Abstract

The invention discloses asphalt mixture aggregate crushing multistage screening equipment which comprises a screening box body, wherein a power transmission mechanism is installed on the inner wall of the middle part of the screening box body, an aggregate temporary storage assembly is arranged above the power transmission mechanism, a conical crushing mechanism is arranged on the upper side of the aggregate temporary storage assembly, an arc-shaped extrusion surface fixed on the inner wall of the screening box body is arranged on the outer side of the conical crushing mechanism, the lower part of the arc-shaped extrusion surface is connected with a cylinder, a needle sheet type screening mechanism is arranged below one power transmission mechanism, the needle sheet type screening mechanism comprises an upper movable plate and a lower movable plate which are hinged through hinges, and an aggregate upper outlet plate and an aggregate lower outlet plate and a needle sheet upper outlet plate and a needle sheet lower outlet plate are respectively hinged to two sides of the upper movable plate and the lower movable plate. The invention has reasonable design, stable operation of the device, thorough screening of the needle sheets, good guarantee of the quality of the asphalt mixture aggregate, high screening efficiency and certain guarantee for the efficient preparation of the asphalt mixture aggregate.

Description

A multi-stage screening equipment for asphalt mixture aggregate crushing

technical field

The invention relates to aggregate processing technology, in particular to a broken multi-stage screening equipment for asphalt mixture aggregate.

Background technique

Asphalt mixture is a general term for the mixture formed by mixing mineral mixture and asphalt binder, in which the mineral aggregate acts as a skeleton, and asphalt and filler act as a cementing and filling effect. Now most of the large-size stones are crushed by crushers and used as asphalt mixture aggregates. The existing crushing scheme crushes the stones repeatedly without screening to improve the crushing effect, and the work efficiency is low. At the same time, the crusher lacks the function of screening the size of the crushed stone, which makes the quality of the crushed stone uneven, which requires subsequent processing of the product, which increases the production cost.

The strength of asphalt mixture largely depends on the gradation and shape of the aggregate. The use of larger and uniform aggregates can increase the interlocking force and internal friction angle of the asphalt mixture, thereby improving the asphalt mixture. Therefore, it is necessary to screen out the needle-shaped particles in the aggregate to reduce the content of the needle-shaped particles in the aggregate. However, the existing needle-shaped screening mechanisms have simple structures and single operation forms, and it is difficult to effectively screen out Needle-like particles in aggregate.

Contents of the invention

The purpose of the present invention is to solve the problems of labor-consuming and low efficiency in the prior art, and propose a multistage screening equipment for asphalt mixture aggregate crushing.

In order to achieve the above object, the present invention adopts the following technical solutions:

A multi-stage screening equipment for asphalt mixture aggregate crushing, including a screening box body, a power transmission mechanism is installed on the inner wall of the middle part of the screening box body, and an aggregate temporary storage component is arranged above the power transmission mechanism. The upper side of the temporary storage component is provided with a cone crushing mechanism, and the outside of the cone crushing mechanism is provided with an arc-shaped extrusion surface fixed on the inner wall of the screening box body. The lower part of the arc-shaped extrusion surface is connected to a cylinder, and the power transmission mechanism is below the A pin-shaped screening mechanism is provided; the needle-shaped screening mechanism includes an upper movable plate and a lower movable plate hinged by hinges, and the upper movable plate and the lower movable plate are hinged on both sides of the aggregate upper discharge plate and the bone. The lower material outlet plate, the needle-shaped upper outlet plate and the needle-shaped lower outlet plate, the left support frame and the right support frame are arranged on both sides of the needle-shaped screening mechanism, and the upper movable plate and the lower movable plate are close to one end Needle-shaped outer sieve cylinder and needle-shaped inner sieve cylinder are provided, the needle-shaped inner sieve cylinder is sleeved on the inner side of the needle-shaped outer sieve cylinder, and the needle-shaped inner sieve cylinder is fixed on the needle-shaped On the inner wall of the needle-shaped upper outlet plate and the needle-shaped lower outlet plate, an adjustment shaft is fixed on one side of the needle-shaped outer screen outlet cylinder, and a connecting shaft is fixed on the left support frame and the right support frame, and the connecting shaft is connected to the screening box in rotation. On the side wall of the main body, the adjustment shaft passes through the inner side of the connecting shaft and is fixed with a rotating disk, and the outside of the rotating disk is provided with a scale line, and a temporary stabilizing component is installed on the outside of the adjusting shaft, and the temporary stabilizing component includes a ratchet, a ratchet A base is provided on the outside, and a plurality of pawls are unevenly installed on the inside of the base, and the pawls are engaged with the ratchet; a reciprocating drive mechanism is provided under the needle-like screening mechanism, and two sides of the reciprocating drive mechanism are respectively provided with Needle flake screen assemblies and aggregate screen assemblies.

Preferably, the power transmission mechanism includes a gear box, the gear box is fixed on the inner wall of the screening box body, the two side walls of the gear box are rotatably connected with a transmission shaft, and one end of the transmission shaft extends to the outside of the screening box body and is fixed The driving pulley is connected, and the middle part of the inner bottom surface of the gearbox is connected with a mounting rod for rotation, and a bevel gear set is rotatably connected between the mounting rod and the two transmission shafts, and the top surface of the bevel gear on the transmission shaft is also eccentrically connected with a driving rod .

Preferably, the cone crushing mechanism includes a crushing bucket, the crushing bucket is fixed on the outer wall of the driving rod, the outer wall of the crushing bucket is fixed with a baffle, the upper side of the crushing bucket is also provided with a connecting bar fixed on the inner wall of the screening box body, and the driving rod The top end is rotatably connected to the bottom surface of the connecting bar, and the arc-shaped extruding surface is arranged above the baffle plate.

Preferably, the aggregate temporary storage assembly includes a sloping guide plate and an opening and closing plate, the sloping guide plate is fixed on the screening box body, and there is space at the lower part of the sloping material guide plate for the opening and closing plate to move, and the opening and closing plate It is composed of multiple movable fan-shaped plates, and the opening and closing plates are driven by telescopic rods.

Preferably, the reciprocating drive mechanism includes a power wheel, the edge of the power wheel is rotatably connected to a power shaft, the outer wall of the power shaft is fixed with arc-shaped teeth, and both sides of the arc-shaped teeth are meshed with movable shafts with gear teeth, The section of the movable shaft is rectangular, and two pairs of conical protrusions are arranged on both sides of the movable shaft.

Preferably, the needle-shaped screening assembly includes a screening dish, the inner wall of the screening dish is inclined and slidably connected with a needle-shaped screen and a fine aggregate screen, and both sides of the bottom of the needle-shaped screen and the fine aggregate screen are fixed with Vibrating rod, the bottom end of the vibrating rod is provided with a conical surface that matches the conical protrusion, and a stabilizing rod is rotatably connected between the needle sheet screen and the fine aggregate sieve, and the lower side of the stabilizing rod is rotatably connected to the movable On the top surface of the shaft, a discharge conveyor belt is installed on the side of the needle sheet screen and the fine aggregate screen facing away from the center of the screening dish.

Preferably, the fine aggregate screen is set in multiple layers and is set as a pull-out type, which can be replaced by pulling out, and the screen holes are gradually reduced from top to bottom. Elevator 1, the bucket elevator 1 can transport the stone crushed by other crushing machines to the material temporary storage component for needle-flaky screening again.

Preferably, the structure included in the aggregate screening assembly is consistent with the structure of the needle-shaped screening assembly, and a bucket elevator 2 is arranged on one side of the aggregate screening assembly, and the bucket elevator 2 can screen out super-sized particles. The aggregates are transported to the crushing mechanism for further crushing.

Compared with the prior art, the present invention provides a multi-stage screening equipment for asphalt mixture aggregate crushing, which has the following beneficial effects:

1. The design of the present invention is reasonable, the device operates stably, and the stones are thoroughly screened, which ensures the quality of asphalt mixture aggregate preparation, and the screening efficiency is high, which provides a certain guarantee for the efficient preparation of asphalt mixture aggregate. Assure;

2. Through the integrated design of crushing and screening, the present invention reduces the steps of crushing and transporting the stones to the screening machine, simplifies the production steps, and circulates and crushes super-sized aggregates after screening. Compared with the crushing method, the crushing efficiency is improved, and the quality of the aggregate is effectively improved;

3. When the crushing mechanism is stopped, the present invention can separate the crushed stones from other equipment into needle flakes, and improve the aggregate quality of asphalt mixture while checking that the needle flakes of stones crushed by other equipment are qualified. High efficiency, realize the purpose of one machine with two uses;

4. The present invention effectively screens out the flakes in the aggregate through the design of the needle-shaped sieving cylinder and the rotary screening method, and realizes the needle-shaped flakes with different particle sizes by adjusting the relative positions of the inner and outer needle-shaped sieving cylinders. The sieving of particles reduces the content of needle flakes in the aggregate and improves the quality of the aggregate. At the same time, the arc-shaped extrusion surface is adjusted by lifting and lowering, and the distance between the arc-shaped extrusion surface and the conical baffle is adjusted in time when there are too many oversized aggregates. distance, improve stone crushing efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the front sectional view of screening box body among the present invention;

Fig. 3 is the plane view of needle sheet screening mechanism in the present invention;

Fig. 4 is a cross-sectional view of the interface of the temporary stabilization assembly of the needle sheet screening mechanism in the present invention;

Fig. 5 is the top view of reciprocating drive mechanism in the present invention;

Fig. 6 is a plan view of the needle sheet screening assembly in the present invention.

In the figure: Screening box body 1, power transmission mechanism 2, aggregate temporary storage component 3, cone crushing mechanism 4, arc-shaped extrusion surface 5, cylinder 6, needle-shaped sieving mechanism 7, reciprocating drive mechanism 8, needle Sheet screening assembly 9, aggregate screening assembly 10, bucket elevator one 11, bucket elevator two 12, driving pulley 13, gear box 21, transmission shaft 22, mounting rod 23, bevel gear set 24, driving rod 25 , material guide inclined plate 31, opening and closing plate 32, crushing bucket 41, baffle plate 42, connecting strip 43, upper movable plate 71, lower movable plate 72, upper aggregate discharge plate 73, lower aggregate discharge plate 74, needle sheet Upper outlet plate 75, needle-shaped lower outlet plate 76, left support frame 77, right support frame 78, needle-shaped outer sieve outlet cylinder 79, needle-shaped inner sieve outlet cylinder 710, connecting shaft 711, rotating disc 712, temporary Stabilization component 713, ratchet wheel 7131, base 7132, pawl 7133, adjustment shaft 714, power wheel 81, power shaft 82, power shaft 82, arc-shaped tooth 83, movable shaft 84, screening dish 91, needle sheet screen 92 , Fine aggregate screen 93, vibrating bar 94, stabilizing bar 95, discharge conveyer belt 96.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", " The orientation or positional relationship indicated by "outside", 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 referred device or element must have a specific orientation, so as to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the invention.

Embodiment one

Referring to Figures 1-4, a multi-stage screening equipment for asphalt mixture aggregate crushing includes a screening box body 1, a power transmission mechanism 2 is installed on the inner wall of the middle part of the screening box body 1, and aggregates are arranged above the power transmission mechanism 2. Temporary storage component 3, the aggregate temporary storage component 3 is provided with a cone crushing mechanism 4, and the outer side of the cone crushing mechanism 4 is provided with an arc-shaped extrusion surface 5 fixed on the inner wall of the screening box body 1, and the arc-shaped extrusion surface 5 The lower part is connected with the cylinder 6, and the power transmission mechanism 2 is provided with a needle-shaped screening mechanism 7. The needle-shaped screening mechanism 7 includes an upper movable plate 71 and a lower movable plate 72 hinged by a hinge, and the upper movable plate 71 and the lower movable plate The two sides of the movable plate 72 are respectively hinged with an upper aggregate outlet plate 73, an aggregate lower outlet plate 74, a needle-shaped upper outlet plate 75, and a needle-shaped lower outlet plate 76. There are left and right sides of the needle-shaped screening mechanism 7. Support frame 77, right support frame 78, upper movable plate 71 and lower movable plate 72 are provided with pin-shaped outer sieve cylinder 79 and needle-shaped inner sieve cylinder 710 at one end close to each other, and needle-shaped inner sieve cylinder 710 is socketed On the inner side of the needle-shaped outer sieve cylinder 79, the needle-shaped inner sieve cylinder 710 is fixed on the inner wall of the needle-shaped upper outlet plate 75 and the needle-shaped lower outlet plate 76, and one side of the needle-shaped outer sieve cylinder 79 is fixed. Adjusting shaft 714 is arranged, and connecting shaft 711 is fixed on one side of left supporting frame 77 and right supporting frame 78, and connecting shaft 711 is rotatably connected on the side wall of screening box body 1, and adjusting shaft 714 passes through connecting shaft 711 inside and is fixed with The rotating disk 712 is provided with a scale line on the outside of the rotating disk 712, and a temporary stabilizing component 713 is also installed on the outside of the adjusting shaft 714. The temporarily stabilizing component 713 includes a ratchet 7131, and a base 7132 is arranged on the outside of the ratchet 7131, and the inside of the base 7132 is unevenly installed. A plurality of pawls 7133, and the pawls 7133 are engaged with the ratchet wheel 7131; a reciprocating drive mechanism 8 is provided under the needle sheet screening mechanism 7, and a needle sheet screening assembly 9 and an aggregate screening assembly are respectively provided on both sides of the reciprocating drive mechanism 8 10.

When in use, first put stones into the screening box body 1, at this time, the aggregates are crushed by the cone crushing mechanism 4, and the crushed aggregates are temporarily stored in the aggregate temporary storage component 3. After measuring, the output end of the aggregate temporary storage component 3 and the upper movable plate 71 are opened. At this time, the aggregate falls into the needle-shaped screening mechanism 7 to complete the screening, and the screened aggregate falls into the needle-shaped screening component 9. and aggregate screening assembly 10 for re-screening, so as to realize the integrated operation of aggregate crushing and screening.

Embodiment two

As shown in Figure 2, this embodiment is basically the same as Embodiment 1. Preferably, the power transmission mechanism 2 includes a gear box 21, the gear box 21 is fixed on the inner wall of the screening box body 1, and the two side walls of the gear box 21 are connected in rotation. There is a transmission shaft 22, one end of the transmission shaft 22 extends to the outside of the screening box body 1 and is rotatably connected with a drive belt, and the middle part of the inner bottom surface of the gear box 21 is rotatably connected with a mounting rod 23, which rotates between the mounting rod 23 and the two transmission shafts 22 A bevel gear set 24 is connected, and a driving rod 25 is eccentrically connected to the top surface of the bevel gear on the transmission shaft 22 .

The cone crushing mechanism 4 includes a crushing bucket 41, the crushing bucket 41 is fixed on the outer wall of the driving rod 25, the outer wall of the crushing bucket 41 is fixed with a baffle 42, and the upper side of the crushing bucket 41 is also provided with a connecting bar fixed on the inner wall of the screening box body 1 43, the top of the driving rod 25 is rotatably connected to the bottom surface of the connecting bar 43, and the arc-shaped extrusion surface 5 is set above the baffle plate 42

In this embodiment, the baffle plate 42 is driven by the power transmission mechanism 2 to perform a conical pendulum movement, and the stone is crushed under the action of the baffle plate 42 and the arc-shaped extrusion surface 5. The structure is stable, and the stone is impacted in various directions, thereby greatly improving the The efficiency of stone crushing.

Embodiment Three

As shown in Figure 2, this embodiment is basically the same as Embodiment 1. Preferably, the aggregate temporary storage assembly 3 includes a sloping guide plate 31 and an opening and closing plate 32, and the sloping guide plate 31 is fixed on the screening box body 1. There is a space at the bottom of the material guide slant plate 31 for the movement of the opening and closing plate 32. The opening and closing plate 32 is spliced by a plurality of movable fan-shaped plates, and the opening and closing plate 32 is driven by a telescopic rod.

In this embodiment, the temporary storage of crushed aggregates is realized through the inclined material guide plate 31 and the opening and closing plate 32, so as to realize the unified screening of aggregates in batches, thereby reducing the energy consumption output of the equipment to a certain extent.

Embodiment four

As shown in Figures 2 and 5, this embodiment is basically the same as Embodiment 1. Preferably, the reciprocating drive mechanism 8 includes a power wheel 81, which is driven by a motor, and the edge of the power wheel 81 is connected with a power shaft 82, power The outer wall of the shaft 82 is fixed with arc-shaped teeth 83, and both sides of the arc-shaped teeth 83 are engaged with a movable shaft 84 with gear teeth. The cross-section of the movable shaft 84 is rectangular.

In this embodiment, the rotation of the power wheel 81 can drive the power shaft 82 to rotate, thereby driving the arc-shaped teeth 73 to move within a certain range, and the movement of the arc-shaped teeth 73 drives the movable shaft 84 to perform linear reciprocating motion, thereby providing a needle-shaped screening assembly 9 and material screening assembly 10 provide power.

Embodiment five

As shown in Figures 2 and 6, this embodiment is basically the same as Embodiment 1. Preferably, the needle-shaped screening assembly 9 includes a screening pan 91, and the inner wall of the screening pan 91 is inclined and slidably connected with a needle-shaped screening net 92 and fine aggregate. Screening net 93, needle flake screen net 92 and fine aggregate screening net 93 bottom surface both sides are all fixed with vibrating rod 94, movable shaft 84 both sides are provided with two pairs of conical projections on the outer wall, vibrating rod 94 bottoms are provided with The conical surface matched by the conical projections, the needle sheet screen 92 and the fine aggregate screen 93 are rotatably connected with a stabilizing rod 95, and the lower side of the stabilizing rod 95 is rotatably connected to the top surface of the movable shaft 84, and the needle sheet Shape screen 92 and fine aggregate screen 93 are all equipped with discharging conveyor belt 96 on the side away from the center of screening dish 91, fine aggregate screen 93 is set to multi-layer and is set to pull-out type, replaces by pulling out, and The sieve holes gradually decrease from top to bottom, and the left side of the needle-shaped screening assembly 9 is equipped with a bucket elevator 11, which can transport the stones crushed by other crushing machines to the material temporary storage assembly 3 Perform needle sheet screening again, the structure included in the aggregate screening assembly 10 is consistent with the structure of the needle sheet screening assembly 9, and one side of the aggregate screening assembly 10 is provided with a bucket elevator 2 12, and the bucket elevator 2 12 can be The screened oversized aggregates are transported to the crushing mechanism for further crushing.

In this embodiment, the vibrating rod 94 moves up and down under the action of the conical protrusion, so that the needle-shaped screen 92 and the fine aggregate screen 93 vibrate up and down, thereby realizing the screening of the needle-shaped and fine aggregates. The sieved needle flake particles are transported to the processing place through the discharge conveyor belt 96, and the fine aggregate discharge conveyor belt 96 of each grade is transported to the aggregate storage bin of the corresponding grade.

Embodiment six

As shown in Figures 3 and 4, this embodiment is basically the same as Embodiment 1. Preferably, the temporary stabilization assembly 713 includes a ratchet 7131, a base 7132 is provided on the outside of the ratchet 7131, and a plurality of ratchets are uniformly installed on the inside of the base 7132. The claw 7133, the pawl 7133 is engaged with the ratchet 7131.

In this embodiment, the adjustment shaft 710 is fixed by ratchet 7131 and pawl 7133 between the upper aggregate outlet plate 73 and the lower aggregate outlet plate 74, so that the adjustment shaft 710 can be automatically limited and fixed after rotation. The non-uniformly arranged pawls 7133 can realize the screening of needle flake particles of different specifications, which greatly enhances the scope of application of the device.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solutions of the present invention and its Any equivalent replacement or change of the inventive concept shall fall within the protection scope of the present invention.

Claims (8)

1. A multi-stage screening equipment for asphalt mixture aggregate crushing, including a screening box body (1), characterized in that a power transmission mechanism (2) is installed on the inner wall of the middle part of the screening box body (1). The above power transmission mechanism (2) is provided with an aggregate temporary storage component (3), the upper side of the aggregate temporary storage component (3) is provided with a cone crushing mechanism (4), and the outside of the cone crushing mechanism (4) is equipped with a fixed screen. The arc-shaped extruding surface (5) on the inner wall of the sub-box body (1), the lower part of the arc-shaped extruding surface (5) is connected with the cylinder (6), and the lower part of the power transmission mechanism (2) is provided with needle-like screening mechanism (7); The pin-shaped screening mechanism (7) includes an upper movable plate (71) and a lower movable plate (72) hinged by hinges, and the two sides of the upper movable plate (71) and the lower movable plate (72) are respectively hinged with bone Material upper discharge plate (73) and aggregate lower discharge plate (74) and pin-shaped upper discharge plate (75) and needle-shaped lower discharge plate (76), the pin-shaped screening mechanism (7) on both sides A left support frame (77) and a right support frame (78) are provided, and the end of the upper movable plate (71) and the lower movable plate (72) is provided with a needle-shaped outer screening cylinder (79) and a needle-shaped inner The sieve cylinder (710), the needle-shaped inner sieve cylinder (710) is sleeved on the inner side of the needle-shaped outer sieve cylinder (79), and the needle-shaped inner sieve cylinder (710) is fixed on the needle-shaped On the inner wall of the outlet plate (75) and the needle-shaped lower outlet plate (76), an adjustment shaft (714) is fixed on one side of the needle-shaped outer screen outlet cylinder (79), and the left support frame (77) and the right support frame (78) A connecting shaft (711) is fixed on one side, and the connecting shaft (711) is rotatably connected to the side wall of the screening box body (1). The adjustment shaft (714) passes through the inside of the connecting shaft (711) and is fixed with disc (712), the outside of the rotating disc (712) is provided with a scale line, the outside of the adjustment shaft (714) is also installed with a temporary stabilization component (713), and the temporary stabilization component (713) includes a ratchet (7131), a ratchet ( 7131) is provided with a base (7132) on the outside, and a plurality of pawls (7133) are unevenly installed on the inside of the base (7132), and the pawls (7133) are engaged with the ratchet (7131); A reciprocating drive mechanism (8) is provided below the needle-shaped screening mechanism (7), and needle-shaped screening components (9) and aggregate screening components (10) are respectively provided on both sides of the reciprocating drive mechanism (8) . 2. A multi-stage screening equipment for asphalt mixture aggregate crushing according to claim 1, characterized in that: the power transmission mechanism (2) includes a gear box (21), and the gear box (21) is fixed on the screen On the inner wall of the sub-box body (1), both sides of the gear box (21) are rotatably connected with a transmission shaft (22), and one end of the transmission shaft (22) extends to the outside of the screening box body (1) and is connected with a drive The belt pulley (13), the middle part of the inner bottom surface of the gearbox (21) is rotatably connected with a mounting rod (23), and a bevel gear set (24) is rotatably connected between the mounting rod (23) and the two transmission shafts (22). The top surface of the bevel gear on the shaft (22) is also eccentrically connected with a drive rod (25). 3. A multi-stage screening equipment for asphalt mixture aggregate crushing according to claim 1, characterized in that: the cone crushing mechanism (4) includes a crushing bucket (41), and the crushing bucket (41) is fixed on the drive On the outer wall of the rod (25), the outer wall of the crushing bucket (41) is fixed with a baffle (42), and the upper side of the crushing bucket (41) is also provided with a connecting strip (43) fixed on the inner wall of the screening box body (1). The top end of the rod (25) is rotatably connected to the bottom surface of the connecting bar (43), and the arc-shaped extrusion surface (5) is arranged above the baffle plate (42). 4. A multi-stage screening equipment for asphalt mixture aggregate crushing according to claim 1, characterized in that: the temporary aggregate storage component (3) includes a guide inclined plate (31) and an opening and closing plate (32 ), the material guide slant plate (31) is fixed on the screening box body (1), the lower part of the material guide slant plate (31) leaves space for the opening and closing plate (32) to move, and the opening and closing plate (32) consists of multiple A movable fan-shaped plate is spliced together, and the opening and closing plate (32) is driven by a telescopic rod. 5. A multi-stage screening equipment for asphalt mixture aggregate crushing according to claim 1, characterized in that: the reciprocating drive mechanism (8) includes a power wheel (81), and the power wheel (81) The power shaft (82) is connected to the edge rotation, and the outer wall of the power shaft (82) is fixed with arc-shaped teeth (83). The cross section of the movable shaft (84) is rectangular, and two pairs of tapered projections on the outer wall are arranged on both sides of the movable shaft (84). 6. A multi-stage screening equipment for asphalt mixture aggregate crushing according to claim 1, characterized in that: the needle-shaped screening assembly (9) includes a screening pan (91), and the inner wall of the screening pan (91) There are needle sheet screens (92) and fine aggregate screens (93) connected by inclined sliding, and vibration rods (94) are fixed on both sides of the needle sheet screens (92) and fine aggregate screens (93) , the bottom end of the vibrating rod (94) is provided with a conical surface matching the conical protrusion, and a stabilizing rod (95) is rotatably connected between the needle sheet screen (92) and the fine aggregate screen (93) ), the lower side of the stabilizing rod (95) is rotatably connected to the top surface of the movable shaft (84), and the pin-shaped screen (92) and fine aggregate screen (93) are both Outfeed conveyor belt (96) is installed. 7. A multi-stage screening equipment for asphalt mixture aggregate crushing according to claim 6, characterized in that: the fine aggregate screen (93) is set in multiple layers and is set in a pull-out type, by pulling out Replacement, and the sieve holes gradually decrease from top to bottom. The left side of the needle-shaped screening assembly (9) is provided with a bucket elevator (11), and the bucket elevator (11) can move other The stone crushed by the crushing machine is transported to the aggregate temporary storage component (3) for needle-like screening. 8. A multi-stage screening equipment for asphalt mixture aggregate crushing according to claim 1, characterized in that: the structure of the aggregate screening assembly (10) is the same as that of the pin-shaped screening assembly (9) Consistently, a bucket elevator 2 (12) is arranged on one side of the aggregate screening assembly (10), and the bucket elevator 2 (12) can transport the screened oversize aggregate to the crushing mechanism for further crushing.

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