阅读说明：本技术 一种沥青再生料用筛网系统 (Screen mesh system for asphalt reclaimed materials ) 是由 陈红英 姜南 李胜江 于 2018-08-14 设计创作，主要内容包括：本发明属于沥青混合料生产设备技术领域,特别涉及一种沥青再生料用筛网系统,其包括沿水平方向倾斜设置的初筛分网、细筛组件和粗筛组件,所述细筛组件和粗筛组件设于初筛分网的下方并呈两列分布,所述细筛组件与初筛分网的倾斜方向相反,所述粗筛组件与初筛分网的倾斜方向相同。该沥青再生料用筛网系统能够实现对沥青再生料的快速筛分,保证沥青再生料的准确分类,且占地面积小。(The invention belongs to the technical field of asphalt mixture production equipment, and particularly relates to a screen mesh system for asphalt reclaimed materials, which comprises a primary screening mesh, a fine screening assembly and a coarse screening assembly which are obliquely arranged along the horizontal direction, wherein the fine screening assembly and the coarse screening assembly are arranged below the primary screening mesh and distributed in two rows, the oblique directions of the fine screening assembly and the primary screening mesh are opposite, and the oblique directions of the coarse screening assembly and the primary screening mesh are the same. This screen cloth system for pitch reclaimed materials can realize the quick screening to pitch reclaimed materials, guarantees the accurate classification of pitch reclaimed materials, and area is little.)

1. The utility model provides a screen cloth system for pitch reclaimed materials, includes along the preliminary screening net (2) of horizontal direction slope setting, fine screen subassembly and coarse screen subassembly, its characterized in that: the fine screen assembly and the coarse screen assembly are arranged below the primary screening net (2) and are distributed in two rows, the inclined directions of the fine screen assembly and the primary screening net (2) are opposite, and the inclined directions of the coarse screen assembly and the primary screening net (2) are the same.

2. The screen system for asphalt regrind according to claim 1, wherein: the fine screen assembly comprises a first screen (31), a second screen (32), a third screen (33) and a first material receiving plate (35) which are vertically arranged in a bearing mode.

3. The screen system for asphalt regrind according to claim 2, wherein: and a fourth screen (34) is arranged between the third screen (33) and the first material receiving plate (35).

4. The screen system for asphalt regrind according to claim 3, wherein: the mesh openings of the first screen (31), the second screen (32), the third screen (33) and the fourth screen (34) are sequentially reduced, and the mesh opening of the first screen (31) is smaller than the mesh opening of the primary screening net (2).

5. The screen system for asphalt regrind according to claim 4, wherein: the meshes of the first screen (31), the second screen (32), the third screen (33) and the fourth screen (34) are square.

6. The screen system for asphalt regrind according to claim 2, wherein: preliminary screening net (2) and first screen cloth (31) between be equipped with baffle (5) that set up along the horizontal direction slope, baffle (5) are the same with the incline direction of preliminary screening net (2).

7. The screen system for asphalt regrind according to claim 1, wherein: the coarse screen assembly comprises a fifth screen (41), a sixth screen (42) and a second material receiving plate (43) which are vertically connected.

8. The screen system for asphalt regrind according to claim 7, wherein: the mesh diameters of the fifth screen (41) and the sixth screen (42) are sequentially reduced, and the mesh diameter of the sixth screen (42) is larger than that of the primary screening net (2).

Technical Field

The invention belongs to the technical field of asphalt mixture production equipment, and particularly relates to a screen mesh system for an asphalt reclaimed material.

Background

As is well known, the Regeneration of Asphalt Pavement (RAP) is an applicable technique for digging or milling a Pavement, recovering old materials, crushing and screening the old materials, adding a part of new regenerated materials and new Asphalt to mix again, and adding a regenerant if necessary to obtain a regenerated Asphalt mixture meeting the performance requirements of a high-grade highway, and using the regenerated Asphalt mixture to pave a Pavement surface layer or a base layer. The asphalt and the crushed stone in the pavement material are repeatedly utilized, so that resources are utilized to the maximum extent and the environment is protected, and the method is a modern environment-friendly technology with the most economic value and social benefit. The recycled materials can be recycled after being crushed and screened normally.

Because the particle size scope in the reclaimed material is comparatively wide, current screen system is vertical distribution, leads to the screening effect poor to the reclaimed material, and work efficiency is lower, still can lead to the granule size can not reach the requirement in the reclaimed material that sieves out, influences the reclaimed material ratio of different particle sizes in the bituminous mixture, influences the quality of pitch product.

Disclosure of Invention

In order to solve the problems, the invention provides a screen system for an asphalt reclaimed material, which can realize quick screening of the asphalt reclaimed material, ensure accurate classification of the asphalt reclaimed material and occupy small area.

The invention is realized by adopting the following technical scheme:

the utility model provides a screen cloth system for pitch reworked material, includes along the preliminary screening net, fine screen subassembly and the coarse screen subassembly of horizontal direction slope setting, fine screen subassembly and coarse screen subassembly are located the below of preliminary screening net and are two and are listed as and distribute, the fine screen subassembly is opposite with the incline direction of preliminary screening net, the coarse screen subassembly is the same with the incline direction of preliminary screening net.

Preferably, the fine screen assembly comprises a first screen, a second screen, a third screen and a first material receiving plate which are vertically connected.

Preferably, a fourth screen is further arranged between the third screen and the first material receiving plate.

In a preferred scheme, the mesh openings of the first screen, the second screen, the third screen and the fourth screen are sequentially reduced, and the mesh opening of the first screen is smaller than the mesh opening of the primary screening net.

Preferably, the mesh openings of the first screen, the second screen, the third screen and the fourth screen are square.

Preferably, a baffle which is obliquely arranged along the horizontal direction is arranged between the primary screening net and the first screen, and the oblique direction of the baffle is the same as that of the primary screening net.

Preferably, the coarse screen assembly comprises a fifth screen, a sixth screen and a second material receiving plate which are vertically connected.

In a preferable scheme, the mesh openings of the fifth screen and the sixth screen are sequentially reduced, and the mesh opening of the sixth screen is larger than the mesh opening of the primary screening net.

Preferably, the fifth screen and the sixth screen are fish scale punching screens.

The invention has the beneficial effects that:

1. according to the invention, the reclaimed materials are divided into the fine reclaimed materials and the coarse reclaimed materials and then are respectively screened, the fine reclaimed materials have a larger proportion and a relatively high separation speed, and more screens are adopted to screen the fine reclaimed materials, so that the separation precision is ensured and the separation speed is accelerated; the coarse reclaimed materials are independently screened relative to the fine reclaimed materials, so that the risk of screening speed reduction caused by plugging of screen holes is reduced, the screening effect is improved, and the method is suitable for industrial production.

2. The fine screen assembly and the coarse screen assembly are arranged in two rows, so that the integration degree is high, the occupied space is small, the mounting and transferring difficulty is reduced, and the space utilization rate is improved.

3. The sieve pores of the fine sieve component are square, so that the reclaimed materials with irregular shapes are ensured to be in the same size grade, the proportioning accuracy of the reclaimed materials with different particle sizes in the asphalt mixture is improved, and the quality of the asphalt is ensured to meet the requirement.

4. According to the invention, each screen is vertically arranged in a supporting manner, so that the total installation space of the screens is saved.

5. The fifth screen and the sixth screen are fish scale punching screens, so that the chances of the reclaimed materials passing through the screen holes are increased, the screening time is further reduced, and the comprehensive production efficiency can be improved by reasonably setting the vibration frequency of the screens.

6. The baffle plate improves the contact length of the fine reclaimed materials and the fine screen assembly, increases the contact area, and prolongs the action time of the fine screen assembly on the fine reclaimed materials, thereby improving the screening effect and the production efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the construction of a screen system for asphalt regrind according to the present invention.

In the figure, 1, a sieve box; 11. a feeding port; 12. a discharge port; 2. primarily screening the net; 31. a first screen; 32. a second screen; 33. a third screen; 34. a fourth screen; 35. a first receiving plate; 41. a fifth screen; 42. a sixth screen; 43. a second material receiving plate; 5. and a baffle plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by persons skilled in the art without any inventive step based on the embodiments of the present invention, belong to the protection scope of the present invention.

As shown in fig. 1, the asphalt plant reclaimed material vibrating screen comprises a screen box 1, a screen system for asphalt reclaimed materials arranged inside the screen box 1, and a vibration exciter for driving the screen system for asphalt reclaimed materials to vibrate, wherein the vibration exciter can adopt a single-shaft vibration exciter, a double-shaft vibration exciter or other various vibration exciters capable of enabling the screen system for recycling construction waste to vibrate, and is not limited herein.

Screen cloth system for pitch reworked material includes along the preliminary screening net 2, fine screen subassembly and the coarse screening subassembly of horizontal direction slope setting, fine screen subassembly and coarse screening subassembly are located the below of preliminary screening net 2 and are two and are listed as the distribution, the fine screen subassembly is opposite with the inclination of preliminary screening net 2, the coarse screening subassembly is the same with the inclination of preliminary screening net 2.

In this embodiment, the fine screen assembly includes a first screen 31, a second screen 32, a third screen 33, and a fourth screen 34, which are disposed in a vertically-connected manner and have sequentially-reduced screen hole diameters, and a first material receiving plate 35 disposed below the fourth screen 34, where the screen holes of the first screen 31, the second screen 32, the third screen 33, and the fourth screen 34 are square. Due to the fact that the shape of the reclaimed materials is irregular, the square sieve pores can guarantee that the reclaimed materials are in the same size grade to the maximum extent, the proportioning accuracy of the reclaimed materials with different particle sizes in the asphalt mixture is improved, and the quality of asphalt is guaranteed to meet the requirements.

In this embodiment, the coarse screen assembly includes a fifth screen 41 and a sixth screen 42 which are disposed in a vertically-supported manner and have sequentially-reduced screen apertures, and a second material receiving plate 43 disposed below the sixth screen 42.

According to the invention, each screen is vertically arranged in a supporting manner, so that the total installation space of the screens is saved. Specifically, taking the primary screening net 2 with square screen holes as an example, the screen hole diameter of each screen is as follows: the mesh aperture of the primary screening net 2 is as follows: 25 × 25mm, mesh opening size of the first screen 31: 16 x 16mm, mesh opening size of the second screen 32: 11 x 11mm, mesh opening size of the third screen 33: 6 x 6mm, mesh opening size of the fourth screen 34: 3 × 3mm, mesh opening size of the fifth mesh 41: 50mm by 50mm, mesh opening size of the sixth screen 42: 40 mm. Since the primary screening net 2 is mainly intended to divide the regrind into fine regrind and coarse regrind, rather than directly obtaining the screened product, the screen holes of the primary screening net 2 may be circular, square or other various shapes, which is not limited herein.

The working principle of the invention is as follows: the reclaimed materials enter the primary screening net 2 from the feeding port 11 and are divided into fine reclaimed materials with the particle size of below 25mm and coarse reclaimed materials with the particle size of above 25mm, then the reclaimed materials enter the fine screening assembly and the coarse screening assembly to be screened respectively, then reclaimed materials with different particle sizes are obtained from each discharging port 12, and the screened reclaimed materials are added into asphalt according to the proportion for use;

the proportion of the fine reclaimed materials is large, the particle size difference of the fine reclaimed materials of adjacent levels is small, but the separation speed is relatively high, and more screens are adopted to screen the fine reclaimed materials, so that the separation precision is ensured, and the separation speed is accelerated;

the coarse reclaimed materials in adjacent levels have larger particle size difference, and because the volume is larger, if the coarse reclaimed materials and the fine reclaimed materials are directly separated by the mixed materials, the mesh openings of the screen are easily blocked, so that the screening speed is reduced, and the separation effect is poor. And the proportion of the coarse reclaimed materials is less, the total screening effect is not influenced even if the screening time is longer, and the method is suitable for industrial production.

In this embodiment, the fifth screen 41 and the sixth screen 42 are fish scale punching screens. The surface of fish scale punching screen has the arch, has attenuate the thickness on regeneration material flow layer, has reduced the hindrance effect that the regeneration material passed the sieve, moves the advection that is changed into the pulsation by hugging closely the sieve inner wall with the regeneration material, makes the regeneration material pass the chance increase of sieve mesh, and then has reduced the screening time, and the accessible rationally sets up the vibration frequency of screen cloth and improves comprehensive production efficiency.

In this embodiment, a baffle 5 which is obliquely arranged along the horizontal direction is arranged between the primary screening net 2 and the first screen 31, the baffle 5 and the primary screening net 2 are in the same oblique direction, and the lower end of the baffle 5 is not in contact with the primary screening net 2 and the first screen 31. The setting of baffle 5 can make the thin reclaimed material at first contact the top of first screen cloth 31, has improved the contact length of thin reclaimed material with first screen cloth 31, second screen cloth 32, third screen cloth 33 and fourth screen cloth 34, has increased area of contact, and the time of action of each screen cloth to the thin reclaimed material more than the extension to screening effect and production efficiency have been improved.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.