阅读说明：本技术 基于输送机或斗提机的防破碎卸料方法 (Anti-crushing unloading method based on conveyor or bucket elevator ) 是由 成宇 陈奕州 杜雪丽 吴军强 于 2021-09-01 设计创作，主要内容包括：本发明公开了一种基于输送机或斗提机的防破碎卸料方法,包括：第一步,根据倾斜角度、运行速度、头部滚筒直径和头部滚筒对质点的支撑力,确定物料的抛卸点和卸料轨迹；第二步,根据卸料轨迹确定抛料罩的弯曲度,使抛料罩和卸料轨迹之间的抛料角小于10°；第三步,根据第二步中的抛料罩,确定耐磨单元的弯曲度,将耐磨单元固定安装在抛料罩的内侧壁上,完成耐磨单元和抛料罩的连接作业；第四步,将耐磨单元和抛料罩固定安装在头部箱体的前方,抛料罩位于卸料轨迹的前方。本发明解决了带式输送机和斗式提升机因物料撞击力大引起的破碎,还能够降低由撞击引起的噪音,改善工作环境,还延长了耐磨单元的使用寿命,进而延长了耐磨单元的更换周期。(The invention discloses an anti-crushing unloading method based on a conveyor or a bucket elevator, which comprises the following steps: firstly, determining a throwing and discharging point and a discharging track of a material according to an inclination angle, an operation speed, the diameter of a head roller and the supporting force of the head roller on mass points; secondly, determining the curvature of the throwing cover according to the unloading track to ensure that a throwing angle between the throwing cover and the unloading track is less than 10 degrees; thirdly, determining the curvature of the wear-resistant unit according to the material throwing cover in the second step, and fixedly mounting the wear-resistant unit on the inner side wall of the material throwing cover to complete the connection operation of the wear-resistant unit and the material throwing cover; and fourthly, fixedly mounting the wear-resisting unit and the material throwing cover in front of the head box body, wherein the material throwing cover is positioned in front of the discharging track. The invention solves the problem of crushing of the belt conveyor and the bucket elevator caused by large impact force of materials, can reduce the noise caused by impact, improves the working environment, prolongs the service life of the wear-resistant unit and further prolongs the replacement period of the wear-resistant unit.)

1. An anti-crushing unloading method based on a conveyor or a bucket elevator is characterized in that: a special anti-crushing structure is adopted and fixedly arranged at the head of the conveyor or the bucket elevator, and the anti-crushing structure comprises

The head box body is provided with a material throwing cover in an arc structure, and the material throwing cover is positioned in front of the material throwing direction;

the wear-resistant unit is of an arc-shaped structure and is fixedly attached to the inner side wall of the head box body;

the material throwing cover and the wear-resistant unit are both arc-shaped structures, so that materials flow down along the material throwing cover;

the anti-crushing unloading method comprises the following steps:

firstly, determining a throwing and discharging point and a discharging track of a material according to an inclination angle, an operation speed, the diameter of a head roller and the supporting force of the head roller on mass points;

secondly, determining the curvature of the throwing cover according to the discharging track in the first step, so that the throwing angle between the throwing cover and the discharging track is smaller than 10 degrees;

thirdly, determining the curvature of the wear-resistant unit according to the material throwing cover in the second step, and fixedly mounting the wear-resistant unit on the inner side wall of the material throwing cover to complete the connection operation of the wear-resistant unit and the material throwing cover;

and fourthly, fixedly mounting the wear-resisting unit and the material throwing cover in front of the head box body, wherein the material throwing cover is positioned in front of the discharging track.

2. The conveyor or bucket elevator based shatter prevention discharge method of claim 1, wherein: the wear-resisting unit is a split type wear-resisting lining plate fixedly connected to the inner side wall of the material throwing cover.

3. The conveyor or bucket elevator based shatter prevention discharge method of claim 1, wherein: the wear-resistant unit is an integrated wear-resistant lining plate fixedly connected to the inner wall of the throwing cover.

Technical Field

The invention relates to bulk material conveying, in particular to an anti-crushing unloading method based on a conveyor or a bucket elevator.

Background

In the case of belt conveyors and bucket elevators in bulk material (such as grain and coke) conveying systems, the included angle between the material throwing hood and the material throwing is the main reason for material breakage during the conveying process of such conveying equipment. Therefore, the included angle between the material throwing cover and the material throwing blanking is often required to be controlled within 15 degrees during design, and the purpose of reducing the material crushing rate is achieved. However, because the restriction of technique and installation space, the most vertical setting of the material throwing cover of current belt conveyor and bucket elevator, the contained angle of material throwing cover and the orbit of unloading often is great, and the impact force that the material striking was thrown the material cover when throwing the material is big, leads to the material broken seriously, still has great striking noise, has still shortened the change cycle of throwing the material cover to a certain extent, has increased the maintenance cost. Therefore, how to reduce the included angle between the material throwing cover and the material throwing and blanking to the maximum extent is an important problem to be solved in the industry.

Disclosure of Invention

In view of the above, the invention provides an anti-crushing discharging method based on a conveyor or a bucket elevator, which solves the problem of serious crushing in the material throwing process of the conveyor or the bucket elevator.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention relates to an anti-crushing unloading method for bulk material conveying, which adopts a special anti-crushing structure, wherein the anti-crushing structure is fixedly arranged at the head of a conveyor or a bucket elevator, and comprises

The head box body is provided with a material throwing cover in an arc structure, and the material throwing cover is positioned in front of the material throwing direction;

the wear-resistant unit is of an arc-shaped structure and is fixedly attached to the inner side wall of the head box body;

the material throwing cover and the wear-resistant unit are both arc-shaped structures, so that materials flow down along the material throwing cover;

the anti-crushing unloading method comprises the following steps:

firstly, determining a throwing and discharging point and a discharging track of a material according to an inclination angle, an operation speed, the diameter of a head roller and the supporting force of the head roller on mass points;

secondly, determining the curvature of the throwing cover according to the discharging track in the first step, so that the throwing angle between the throwing cover and the discharging track is smaller than 10 degrees;

thirdly, determining the curvature of the wear-resistant unit according to the material throwing cover in the second step, and fixedly mounting the wear-resistant unit on the inner side wall of the material throwing cover to complete the connection operation of the wear-resistant unit and the material throwing cover;

and fourthly, fixedly mounting the wear-resisting unit and the material throwing cover in front of the head box body, wherein the material throwing cover is positioned in front of the discharging track.

The wear-resisting unit is a split type wear-resisting lining plate fixedly connected to the inner side wall of the material throwing cover, and can also be an integrated wear-resisting lining plate fixedly connected to the inner wall of the material throwing cover. In actual installation, the split type or integrated structure of the wear-resistant lining plate can be determined according to the material of the wear-resistant lining plate, for example, when a polyethylene lining plate with certain flexibility is adopted, the wear-resistant lining plate can adopt an integrated structure; when the wear-resistant material with higher hardness is adopted, the wear-resistant lining plate can adopt a split structure and can be spliced by a plurality of wear-resistant lining blocks, so that different requirements of customers are met.

By adopting the technical scheme, the beneficial effects are as follows:

the invention solves the crushing phenomenon of a belt conveyor and a bucket elevator caused by large impact force of materials, and particularly comprises the following steps: throwing the material cover and wear-resisting unit and be the arc structure, make the orbit of unloading and throw the contained angle between the material cover and reduce as far as possible, the material is thrown the wear-resisting unit that the material covered by the striking and is changed into following current and down, the striking dynamics when the material falls reduces greatly, has not only reduced the breakage rate of material, can also reduce the noise that arouses by the striking, improves operational environment, has still prolonged the life of wear-resisting unit, and then has prolonged the change cycle of wear-resisting unit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the invention and are not to be construed as limiting all embodiments of the invention.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the discharge trajectory of the material when the conveyor is horizontally mounted.

Fig. 3 is a schematic diagram of the discharge trajectory of the material when the conveyor is mounted at an incline (running speed is faster).

Fig. 4 is a schematic diagram of the discharge trajectory of the material when the conveyor is mounted at an incline (slower running speed).

The names of the components corresponding to the corresponding reference numerals in the drawings are: 1-head box body; 2-a material throwing cover; 3-a wear resistant unit; 4-a belt; 5-a discharge trajectory; 6-head roller.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.

As shown in figure 1, the anti-crushing unloading method based on the conveyor or the bucket elevator adopts a special anti-crushing structure which is fixedly arranged at the head of the conveyor or the bucket elevator and comprises the following steps

The head box body 1 is provided with a material throwing cover 2 in an arc structure, and the material throwing cover 2 is positioned in front of the material throwing direction;

the wear-resistant unit 3 is fixedly connected to the inner side wall of the throwing cover 2, the wear-resistant unit 3 is of an arc-shaped structure, and the bending direction of the wear-resistant unit 3 is consistent with that of the throwing cover 2;

wherein, throwing material cover 2 and wear-resisting unit 3 all are the arc structure, make the material orbit of unloading and throw the contained angle between the material cover 2 and reduce as far as possible, the material is unloaded the orbit 5 and is thrown the contained angle between the material cover 2 and reduce to gamma by current alpha, and the material is unloaded the orbit 5 and is thrown the contained angle between the material cover 2 and reduce greatly, and then has alleviateed the impact of material, reduces the material breakage.

In actual installation, the wear-resistant unit 3 is fixedly installed on the inner side wall of the throwing cover 2 through bolts, the structure of the wear-resistant unit is flexibly selected according to the material, and when the material (such as a polyethylene plate) has better flexibility, the wear-resistant unit 3 is an integrated wear-resistant lining plate fixed on the inner side wall of the throwing cover 2 through bolts; when wear-resisting unit 3 adopted the great material of hardness, wear-resisting unit 3 was by the split type wear-resisting welt that the wear-resisting filler block of polylith was pieced together, and every wear-resisting filler block passes through bolt fixed mounting on throwing material cover 2, is convenient for change and installation.

The wear-resisting unit 3 is the split type wear-resisting welt that links firmly on throwing material cover 2 inside walls, can also be the wear-resisting welt of integral type that links firmly on throwing material cover 2 inside walls. In actual installation, the split type or integrated structure of the wear-resistant lining plate can be determined according to the material of the wear-resistant lining plate, for example, when a polyethylene lining plate with certain flexibility is adopted, the wear-resistant lining plate can adopt an integrated structure; when the higher wear-resisting material of adoption hardness, the wear-resisting welt can adopt split type structure, can be pieced together by the wear-resisting filler block of polylith, and every wear-resisting filler block passes through bolt fixed mounting on throwing material cover 2, and the change in the later stage of being convenient for is maintained, satisfies customer's different requirements.

The following takes a conveyor as an example to specifically describe the anti-crushing discharging method of the invention:

firstly, determining a material throwing and discharging point and a material discharging track according to the inclination angle, the running speed, the head roller 6 and the supporting force of the head roller 6 on particles, and the concrete process is as follows:

firstly, determining the supporting force F of the head roller to mass points, wherein the supporting force F of the head roller to mass is equal to the reaction force-centrifugal force of the conveyer belt to materials, and the calculation formula is as follows:；

in the formula: f is the supporting force of the roller to mass points, and N; beta is the inclination angle of the conveyor and the horizontal plane;vm/s is the running speed; r is the radius of the head roller, m;

secondly, based on the stress analysis, the inclination angle, the running speed and the radius of the head roller, an unloading track equation under different conveying conditions is determined, and the method specifically comprises the following steps:

when the angle of inclination of the conveyor is 0 (i.e. the conveyor is mounted horizontally) and the centrifugal force of the mass point is equal to gravity, the mass point will move parabolically after leaving the conveyor belt 4 at the vertical center of the head drum 6, i.e. the drop point F is at the top of the head drum, as shown in fig. 2. Taking the center of the head roller 6 as a coordinate point, the motion trail equation of the material is as follows:

② when the conveying speed of the conveyor is faster (i.e. the conveyor is used for conveying articlesF < 0), the material leaves from the tangent point of the conveyor belt 4 and the head roller 6, i.e. the drop point F is the tangent point of the conveyor belt 4 and the head roller 6, as shown in fig. 3. Taking the center of the roller as a coordinate point, the motion trail equation of the material is as follows:

；

③ when the conveying speed of the conveyer is slower (namelyF > 0), the material will fall around the highest point of the head drum 6, as shown in fig. 4. Taking the center of the roller as a coordinate point, the motion trail equation of the material is as follows:

；

wherein theta in the formula can be determined according to the stress condition at the throwing and unloading point, the gravity at the throwing and unloading point is mg, and the centrifugal force is mv ²R, then；

Secondly, determining the curvature of the material throwing cover 2 by taking the intersection line of the unloading track 5 and the horizontal coordinate line in the first step as an optimal contact point according to the throwing and unloading point and the unloading track obtained by calculation in the first step, so that a throwing angle gamma between the material throwing cover 2 and the unloading track 5 is smaller than 10 degrees, and processing according to the design size to obtain the material throwing cover;

thirdly, obtaining a wear-resistant unit with a copying design according to the material throwing cover, and fixedly mounting the wear-resistant unit (which can be an integrated wear-resistant lining plate or a split wear-resistant lining plate) on the inner side wall of the material throwing cover through bolts;

and fourthly, after the head box body 1, the head ash removal mechanism and the head roller 6 are installed, fixedly installing the throwing cover 2 and the wear-resisting unit 3 which are fixedly connected together on the head box body 1, wherein the throwing cover 2 is positioned in front of the discharging track 5.

In the running process of the conveyor, the materials run to the head along the conveyor belt 4, when the materials move to the head roller 6 along the conveyor belt 4, the materials do parabolic motion from a throwing and discharging point, and the discharging track flows down along the throwing cover 2 and falls into a discharging hopper or a silo below. The invention adopts the material throwing cover with an arc structure, so that the included angle between the discharging track and the material throwing cover 2 is reduced as much as possible, the material is changed from the impact material throwing cover of the raw material to the downstream material throwing cover 2, the impact force of the material is greatly reduced, the crushing rate of the material is reduced, and the material quality is improved; the noise caused by the fact that the materials impact the material throwing cover 2 can be reduced, the service life and the replacement period of the wear-resistant lining plate can be effectively prolonged, and the maintenance cost is reduced.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, "upper", "lower", "left", "right", "front", and "rear", etc. are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships may also be changed accordingly.

Finally, it should be emphasized that the above-described embodiments are merely preferred embodiments of the present invention, and not limitative of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents may be made to the embodiments described in the foregoing without inventive faculty, or that equivalents may be substituted for elements thereof. Therefore, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.