Stone falling prevention device for lower conveying part of gravel belt conveyor

Abstract

The utility model relates to the technical field of stone conveying, and particularly discloses a stone falling prevention device for a lower conveying part of a gravel belt conveyor, which comprises a bottom frame for mounting a plurality of rotating rollers of the lower conveying part of the belt conveyor, conveying belts surround the outer circumferences of the rotating rollers, and the conveying belts positioned at the two ends of the lower conveying part extend upwards to an upper conveying part. The conveying faces of the conveying belts are located on the upper conveying part, a collecting box used for preventing falling broken stones from falling on the rotating rollers of the lower conveying part is arranged on the bottom frame, the collecting box is located between the conveying belts with the two ends extending upwards, and the collecting box is located above the rotating rollers of the lower conveying part. And at least one silk screen for buffering falling broken stones and preventing the broken stones from popping out of the collecting box is arranged in the collecting box. When falling into the collecting box, the broken stones are blocked by the collecting box, the broken stones are prevented from hitting a rotating roller and a conveying belt of the lower conveying part, the effect of protecting the lower conveying part is achieved, a silk screen in the collecting box has a buffering effect on the falling broken stones, and the broken stones are left in the collecting box.

Description

TECHNICAL FIELD

[0001] The utility model relates to stone conveying technical field, specifically is a kind of crushed stone belt conveyor lower conveying part anti-rockfall device. BACKGROUND

[0002] Belt conveyor is the conveying device frequently used when crushed stone is transferred in site, and it is generally used for conveying solid materials, and its structural components mainly include power driving device, driving roller, driven roller, tensioning roller and conveying belt etc.The belt conveyor for conveying crushed stone includes upper conveying part and lower conveying part, and the lower conveying part is arranged on the ground, including power driving device, driving roller and driven roller, and the upper conveying part includes a plurality of driven rollers, and the conveying belt is wound on the driving roller and the driven roller, and the conveying surface of the conveying belt is in the upper conveying part, and the lower conveying part is below the conveying belt of the upper conveying part.In the conveying process of crushed stone, there is the situation that crushed stone falls, and small stones will roll down from both sides of the conveying belt, and when the position of the falling crushed stone is above the lower conveying part, the crushed stone will hit the driving roller, the driven roller and the conveying belt of the lower conveying part, and the kinetic energy of the crushed stone increases in the process of falling from a high place, and hitting the driving roller or the driven roller will cause damage or deformation to the roller, and if the roller is damaged or deformed greatly, it will affect the normal operation of the belt conveyor;after the crushed stone hits the roller, the flight direction changes irregularly, and the speed changes rapidly after the flight direction changes, causing the crushed stone to fly randomly and affecting personal safety;some crushed stones will fall in the gap between the conveying belt and the roller, affecting the stable operation of the belt conveyor. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a kind of anti-rockfall devices of crushed stone belt conveyor lower conveying part for solving the problem that the lower conveying part of belt conveyor is damaged by falling of crushed stone in conveying process, and the anti-rockfall device is prevented from hitting the lower conveying part by crushed stone.

[0004] To solve the above technical problems, the utility model includes the bottom frame for installing the plurality of rollers of the lower conveying part of belt conveyor, the outer circumference of the roller is surrounded by the conveying belt, the conveying belt at both ends of the lower conveying part extends upwards to the upper conveying part, and the conveying surface of the conveying belt is in the upper conveying part, and the structural characteristics are that: the bottom frame is equipped with the collection box for preventing falling crushed stone from falling on the roller of the lower conveying part, and the collection box is between the conveying belt extending upwards at both ends, and the collection box is above the roller of the lower conveying part, and at least one wire mesh for buffering falling crushed stone and preventing the crushed stone from bouncing out of the collection box is arranged in the collection box.

[0005] After the above structure, the gravel is transported by the belt conveyor, the belt conveyor comprises an upper conveying part and a lower conveying part, the conveying surface of the conveying belt is located at the upper conveying part, some gravel will slide off from the two sides of the conveying belt during the conveying of the conveying belt, the speed of the sliding gravel increases during the falling process, and the impact force becomes large, if part of the falling gravel is not blocked, the gravel will hit the rotating roller and the conveying belt of the lower conveying part, since the gravel falls to the lower conveying part at a high speed, if the gravel directly hits the rotating roller of the lower conveying part of the belt conveyor, the rotating roller will be damaged to a certain extent, the rotating roller is locally deformed, the flying direction of the gravel hitting the rotating roller changes, and personal injury may occur, if the gravel falls in the gap between the conveying belt and the rotating roller of the lower conveying part, the stability of the contact between the conveying belt and the rotating roller is affected, and the long-term stable operation of the belt conveyor is affected. The collecting box is arranged above the rotating roller of the lower conveying part of the belt conveyor, when the gravel hitting the rotating roller and the conveying belt falls to the position of the collecting box, the gravel is blocked by the collecting box and stops falling, so that the gravel falls on the rotating roller of the lower conveying part of the belt conveyor is prevented, the lower conveying part of the belt conveyor is protected, the long-term stable operation of the belt conveyor is ensured, most of the gravel falling on the collecting box falls on the wire mesh, the wire mesh has a certain elasticity and toughness, the wire mesh plays a role in force relief and buffering of the gravel, the speed and height of the rebound of the gravel are greatly reduced, and the gravel stays in the collecting box.

[0006] The wire mesh is a stainless steel wire mesh.

[0007] The wire mesh is an inclined wire mesh, the periphery of the collecting box is provided with a cofferdam, the height of the inclined wire mesh is lower than the upper edge of the cofferdam, and a gap is left between the inclined wire mesh and the cofferdam for the gravel to slide into the collecting box.

[0008] The bottom of the collecting box is provided with an inclined discharging chute for sliding the gravel in the collecting box out, and the bottom plate of the collecting box is an inclined bottom plate that inclines downward towards the discharging chute.

[0009] A gap is left between the inclined bottom plate and the inclined wire mesh.

[0010] The cofferdams at the two ends of the collecting box are arranged close to the upwardly extending conveying belt.

[0011] The collecting box is arranged above the rotating roller of the lower conveying part of the belt conveyor, is used for preventing the gravel falling from the conveying belt from hitting the rotating roller and the conveying belt of the lower conveying part, protects the rotating roller and the conveying belt of the lower conveying part, and enables the belt conveyor to operate stably for a long time; the collecting box is provided with an inclined wire mesh, the speed of the gravel falling on the inclined wire mesh is absorbed and buffered, the rebound speed and height of the gravel are reduced, so that the gravel stays in the collecting box, the problem of the flying of the gravel after rebounding is reduced, the staff is protected, then the gravel slides into the inclined bottom plate or the discharging chute of the collecting box, and finally the gravel is discharged from the collecting box through the discharging chute. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the utility model;

[0013] Figure 2 is Figure 1 an A-A cross section schematic view, the collecting box is equipped with two inclined wire meshes;

[0014] Figure 3 is Figure 2 a B-B cross section schematic view;

[0015] Figure 4 is Figure 2 a C-C cross section schematic view;

[0016] Figure 5 is a schematic view of another inclined wire mesh setting mode, the collecting box is equipped with one inclined wire mesh;

[0017] In the drawing: 1, collecting box; 11, discharge chute; 12, cofferdam; 13, inclined bottom plate; 2, inclined wire mesh; 3, support; 100, base frame; 200, conveying belt; 300, driving roller; 301, lower conveying part driven roller; 302, lower conveying part tensioning roller; 400, upper conveying part driven roller. DETAILED DESCRIPTION

[0018] As Figure 1 , 3 , 5 shows the belt conveyor for conveying gravel, including upper conveying part and lower conveying part, the lower conveying part is usually arranged on the ground, and the upper conveying part is located above the lower conveying part, the belt conveyor is an existing device, and does not belong to the range of the utility model, the lower conveying part includes a power driving device (not shown in the drawing), a driving roller 300 and a lower conveying part driven roller 301, the lower conveying part of the belt conveyor in the drawing is also provided with a lower conveying part tensioning roller 302 for tensioning the conveying belt 200, the lower conveying part tensioning roller 302 is also a driven roller, the conveying belt 200 is wound around the outer periphery of the driving roller 300, the lower conveying part driven roller 301 and the lower conveying part tensioning roller 302, the power driving device is usually a motor, the power driving device is power-connected with the driving roller 300, which is a conventional setting in the field, the driving roller 300, the lower conveying part driven roller 301 and the lower conveying part tensioning roller 302 are fixedly installed on the base frame 100, and the conveying belt 200 at both ends of the lower conveying part extends upward to the upper conveying part, the two ends of the roller in the length direction are side portions, and the position, at which the conveying belt 200 of the lower conveying part extends upward, is an end portion, the upper conveying part is provided with a plurality of upper conveying part driven rollers 400, the conveying belt 200 is wound around the outer periphery of the upper conveying part driven rollers 400, and the conveying surface of the conveying belt 200 is located in the upper conveying part.

[0019] ReferringFigures 1-5 The utility model discloses a gravel belt conveyor lower conveying part anti-rockfall device, including the collection box 1 of installation on the chassis 100, the collection box 1 is located the upper portion of the driving roller 300, lower conveying part driven roller 301, lower conveying part tensioning roller 302, the collection box 1 is used to prevent the gravel falling from the upper conveying part and hit the driving roller 300, lower conveying part driven roller 301, lower conveying part tensioning roller 302 and the conveyer belt 200 of lower conveying part, the collection box 1 is set between the conveyer belt 200 of the upward extension of lower conveying part both ends, be equipped with at least one piece of silk screen in the collection box 1, and the silk screen has certain elasticity and tenacity, and the silk screen can buffer the speed when gravel falls, absorbs the kinetic energy of gravel, makes the speed and height of gravel rebound reduce, prevents the gravel from rebounding to the outside of collection box 1, and the rebounding distance of gravel is reduced after bouncing up. As shown in the drawing, the collection box 1 is supported on the chassis 100 through the support 3, and the silk screen is preferably a stainless steel screen, which has high strength and certain flexibility, has good buffering effect on gravel, and the smooth surface of stainless steel is beneficial to the sliding of gravel.

[0020] Referring to Figures 1-5 The periphery of the collection box 1 is provided with a cofferdam 12, and the edge of the silk screen is fixedly connected to the cofferdam 12. The cofferdam 12 blocks the gravel bouncing up on the silk screen, and the cofferdams 12 at both ends of the collection box 1 are arranged close to the upwardly extending conveyer belt 200, so as to reduce the gap between the conveyer belt 200 and the cofferdam 12, increase the area of the collection box 1, and prevent the falling gravel from passing through the gap between the cofferdam 12 and the conveyer belt 200. The silk screen is an inclined silk screen 2, the height of the inclined silk screen 2 is lower than the upper edge of the cofferdam 12, and a gap is left between the inclined silk screen 2 and the cofferdam 12 for the gravel to slide into the collection box 1. The gravel bouncing up on the inclined silk screen 2 falls back, slides downward along the inclined direction of the inclined silk screen 2, and slides into the bottom plate of the collection box 1 through the gap between the inclined silk screen 2 and the cofferdam 12. The bottom plate of the collection box 1 is an inclined bottom plate 13, and the bottom of the collection box 1 is provided with an inclined discharge chute 11. The discharge opening of the discharge chute 11 extends to the outside of the collection box 1, the discharge chute 11 slides the gravel in the collection box 1 out of the collection box, and the inclined bottom plate 13 is inclined downward in the direction of the discharge chute 11, that is, the slope of the inclined bottom plate 13 is directed to the discharge chute 11. A gap is left between the inclined bottom plate 13 and the inclined silk screen 2. If the inclined silk screen 2 is attached to the upper surface of the inclined bottom plate 13, the buffering effect of the inclined silk screen 2 on the gravel will be reduced. The gravel falling on the inclined silk screen 2 first slides onto the inclined bottom plate 13, then slides from the inclined bottom plate 13 into the discharge chute 11, and finally is discharged from the discharge opening of the discharge chute 11. Figures 1-4 Two inclined silk screens 2 are arranged in the collection box 1, the discharge chute 11 is located at the middle position of the bottom of the collection box 1, the two ends of the inclined silk screen 2 and the inclined bottom plate 13 are higher, and the middle discharge chute 11 is inclined, so as to slide the inclined silk screen 2 and the inclined bottom plate 13 into the discharge chute 11. Figure 5A piece of inclined wire mesh 2 is arranged in the middle, the end of the inclined bottom plate 13 is inclined to the discharge chute 11, the position of the inclined wire mesh 2 away from the discharge port of the discharge chute 11 is high, and it is inclined downward to the discharge port of the discharge chute 11. The gravel on the inclined wire mesh 2 first slides onto the inclined bottom plate 13, and then slides into the discharge chute 11. Of course, the inclined wire mesh 2, the inclined bottom plate 13, and the discharge chute 11 can also be designed in other inclined ways, as long as they can discharge the gravel from the collection box 1. The belt conveyor will vibrate during operation, and the vibration of the chassis 100 will be transmitted to the collection box 1 and the inclined wire mesh 2 mounted on the chassis 100, which is beneficial to the sliding of the gravel. The inclined wire mesh 2, the discharge chute 11, and the inclined bottom plate 13 are made of smooth metal material, and the gravel can slide at an inclination angle of about 20°.

[0021] Working process: When the belt conveyor is used to convey gravel, the gravel accumulates on the conveyor belt 200 of the conveying part of the belt conveyor and is conveyed. Some gravel rolls off the gravel pile during the conveying process due to unstable position or vibration, and then falls from the side of the conveyor belt 200. Among the falling gravel above the lower conveying part of the belt conveyor, part of it hits the rotating roller and the conveyor belt of the lower conveying part when flying obliquely downward. This part of gravel enters the collection box 1 when falling to the height of the collection box 1, most of it falls on the inclined wire mesh 2 in the collection box 1. The kinetic energy of the gravel falling on the inclined wire mesh 2 is absorbed by the inclined wire mesh 2, and the rebound speed and height are greatly reduced. After rebounding, most of them fall back onto the inclined wire mesh 2 again, or fall onto the inclined bottom plate 13 through the gap between the inclined wire mesh 2 and the cofferdam 12. A small number of them will bounce out of the collection box 1. The gravel falling on the inclined wire mesh 2 slides along the inclined wire mesh 2, and then falls onto the inclined bottom plate 13. The gravel flying out of the collection box 1 will not hit the rotating roller and the conveyor belt 200 of the lower conveying part. A small amount of falling gravel will directly fall onto the inclined bottom plate 13 or the discharge chute 11 through the gap between the inclined wire mesh 2 and the cofferdam 12. Part of this gravel rebounds and falls back onto the inclined wire mesh 2, remaining in the collection box 1, and part of it bounces out of the collection box 1. The gravel flying out of the collection box 1 will not hit the rotating roller and the conveyor belt 200 of the lower conveying part. The gravel remaining in the collection box 1 will slide from the inclined bottom plate 13 to the discharge chute 11, and finally slide out of the discharge port of the discharge chute 11. The discharged gravel can be collected by a trolley or a collection box. The collection box 1 can prevent the gravel falling from the upper conveying part from hitting the rotating roller and the conveyor belt 200 of the lower conveying part, prevent the gravel from damaging the rotating roller of the lower conveying part, prevent the gravel from falling into the gap between the rotating roller and the conveyor belt 200, and protect the lower conveying part. It avoids the influence of gravel on the normal operation of the belt conveyor; most of the falling gravel is collected by the collection box 1, greatly reducing the phenomenon of gravel flying after hitting the rotating roller of the lower conveying part, and reducing the possibility of personal injury.

[0022] The utility model discloses a gravel belt conveyor lower conveying part rockfall prevention device, through the collection box of setting in the lower conveying part rotation roller top prevents the gravel of falling and hitting the rotation roller and conveyer belt of lower conveying part, plays the protection effect to the lower conveying part, avoids the gravel of falling and influences the normal operation of belt conveyor, is equipped with the inclined wire mesh in the collection box, and the inclined wire mesh has the buffer effect to the gravel of falling, can absorb the kinetic energy when the gravel falls, reduces the height and speed of gravel rebound, thereby will be gravel intercept in the collection box, reduces the personal injury caused by the gravel from the collection box and flies, and the gravel in the collection box finally discharges through the discharge chute.

Claims

1. A rock-fall prevention device for the lower conveying section of a crushed stone belt conveyor, comprising a chassis (100) for mounting a plurality of rollers of the lower conveying section of the belt conveyor, wherein a conveyor belt (200) surrounds the outer circumference of the rollers, and the conveyor belts (200) located at both ends of the lower conveying section extend upward to the upper conveying section, wherein the conveying surface of the conveyor belt (200) is located at the upper conveying section, and wherein: The base frame (100) is provided with a collecting box (1) for preventing falling gravel from falling onto the rollers of the lower conveying portion, and the collecting box (1) is located between the conveyor belts (200) extending upward at both ends. The collecting box (1) is located above the rollers of the lower conveying portion, and the collecting box (1) is provided with at least one wire mesh for cushioning falling gravel and preventing the gravel from popping out of the collecting box (1).

2. The rock-fall prevention device for the lower conveying section of a crushed stone belt conveyor according to claim 1 is characterized in that: The wire mesh is a stainless steel wire mesh.

3. The rock-fall prevention device for the lower conveying section of a crushed stone belt conveyor according to claim 1 is characterized in that: The wire mesh is an inclined wire mesh (2), a cofferdam (12) is provided around the collecting box (1), the height of the inclined wire mesh (2) is lower than the upper edge of the cofferdam (12), and a gap is left between the inclined wire mesh (2) and the cofferdam (12) for gravel to slide into the collecting box (1).

4. The rock-fall prevention device for the lower conveying section of a crushed stone belt conveyor according to claim 3 is characterized in that: The bottom of the collecting box (1) is provided with an inclined discharge chute (11) for sliding the gravel in the collecting box (1) out, and the bottom plate of the collecting box (1) is an inclined bottom plate (13), and the inclined bottom plate (13) is inclined downward in the direction of the discharge chute (11).

5. The rock-fall prevention device for the lower conveying section of a crushed stone belt conveyor according to claim 4 is characterized in that: A gap is left between the inclined bottom plate (13) and the inclined wire mesh (2).

6. The rock-fall prevention device for the lower conveying section of a crushed stone belt conveyor according to claim 3 is characterized by: The cofferdams (12) at both ends of the collecting box (1) are arranged close to the conveyor belt (200) extending upward.

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