CN103935691A - Carrier roller arrangement structure for horizontal bending belt conveyer - Google Patents

Abstract

The invention discloses a carrier roller arrangement structure for a horizontal bending belt conveyer. A carrier roller set arranged below a conveyer belt comprises buffer carrier rollers, flat carrier rollers and groove type rollers, wherein turning carrier rollers are arranged on the turning position of the conveyer belt, the turning carrier rollers are of a groove type carrier roller structure, the outer-side rollers are higher than the inner-side rollers of the turning carrier roller, and the outer-side rollers and the inner-side rollers are provided with gears matched with a side chain; at the position of turning, and the ratio of the turning radiuses of different positions of the conveyer belt is equal to the ratio of the radiuses of the carrier rollers corresponding to the conveyer belt in position. The carrier roller arrangement structure for the horizontal bending belt conveyer is bendable, reliable in operation, low in power consumption and high in conveying line adaptability.

Description

Roller Arrangement Structure Applied to Horizontal Curved Belt Conveyor

technical field

The invention relates to an arrangement structure of idler rollers of a conveyor.

Background technique

In the prior art, a belt conveyor mainly includes a conveyor belt, idler rollers and an intermediate frame, a roller tensioning device, a braking device, a cleaning device, and a discharge device. Conveyor belts are the most expensive and wear-resistant of the belt conveyor components. When transporting highly abrasive materials, such as iron ore, the durability of the conveyor belt is significantly reduced. The traditional belt conveyor mainly has the following problems in mine production:

(1) The adaptability of the transportation in the bending stage is poor. The traditional belt conveyor can only be used for the straight section or the conveying section with a small bending angle. When it is used for the section with a large bending angle or a large number of bendings, it needs to be transferred from one conveyor to another. Reloading increases the link in the transportation, and in the conveyor system, the feeding speed must be specified in some places. In addition, the traditional conveyor cannot meet the needs of fully mechanized mining face inclination adjustment, and has poor adaptability to geological conditions. Some corner coal cannot be mined, resulting in a large amount of coal loss, reducing the recovery rate, and no good economic benefits.

(2) The service life of the belt is short. The traditional belt conveyor uses the conveyor belt as the traction mechanism, and it is also the load-bearing mechanism. The wear of the belt is serious, and the service life will be greatly reduced. As long as there is one damage on the conveyor belt, the belt must be replaced, but the cost of the conveyor belt is about half of the cost of the conveyor, which is very expensive; or cut off and re-spliced by hot vulcanization, but the steps are cumbersome, time-consuming and labor-intensive, and re-splice The strength of the rear belt is reduced, it is more likely to be damaged, and there is a safety hazard.

(3) Transportation capacity is limited. The traditional belt conveyor is based on the principle of friction transmission. When the transmission distance is too large, it is easy to cause the conveyor to be overloaded, and there will be slippage between the belt and the pulley, which will cause the transmission to fail. Forcibly improving the conveying capacity and increasing the tension of the belt will inevitably greatly accelerate the shaft damage to the drive drum, and the belt will wear faster, and the increase is very limited.

(4) The length of the conveyor belt cannot be adjusted. Traditional belt conveyors generally change the length of the conveyor through a belt storage device. The belt storage device has a complex structure and a large volume, which is inconvenient for transportation and disassembly, and is not easy to relocate. In addition, due to the limited length of the conveyor belt stored in the belt storage bin, when advancing coal mining or roadway excavation, there is a great requirement for the retractable length of the conveyor, the belt storage capacity is often not required for work, and the belt needs to be increased unnecessarily The trouble also reduces the strength of the belt.

(5) Easy to go off track. During the operation of the conveyor belt, the deviation of the conveyor belt may be caused by the deviation of the conveyor belt manufacturing, the eccentric accumulation of materials, the deformation of the frame, the effect of wind load and the uneven distribution of tension. The deviation of the conveyor belt will cause the friction between the conveyor belt and the frame, causing the edge glue to wear. Deviations will lead to an increase in the number of accidental stops of the conveyor, which will affect production, and deviations may also cause materials to spread out, reducing the operating economy of the conveyor system.

Therefore, those skilled in the art are devoting themselves to developing an arrangement structure of idler rollers that can be applied to belt conveyors that are continuously transported at bends.

Contents of the invention

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide an arrangement structure of idler rollers that can be applied to belt conveyors that are continuously transported at bends.

In order to achieve the above object, the present invention provides an idler arrangement structure applied to a horizontal curved belt conveyor, the conveyor includes a frame and a conveyor belt; one end of the conveyor belt is provided with a charging device, and the other end is provided with a There is an unloading device; the feature is that: the set of rollers arranged under the conveyor belt includes buffer rollers, flat rollers and grooved rollers;

The buffer idler is arranged below the charging device; the flat idler and the grooved idler are arranged at intervals;

Wherein, the middle part of a plurality of said flat rollers is provided with a transmission groove, or/and the middle part of a plurality of said trough rollers is provided with a transmission groove; said transmission groove is provided with a transmission sprocket; The transmission sprocket is driven by a motor;

A turning idler is provided at the turning of the conveyor belt; the turning idler is a grooved idler structure, and the outer idler is higher than the inner idler; the outer idler and the inner idler are both provided with the side chain matching gears;

At the turning, the ratio of the turning radius of different parts of the conveyor belt is equal to the ratio of the radius of the idler roller corresponding to the position of the conveyor belt.

Preferably, a transmission groove is opened in the middle of the flat roller of the turning idler, and a transmission sprocket is arranged at the transmission groove, and the transmission sprocket is driven by a motor.

The beneficial effects of the present invention are:

(1) It can be bent. The invention can make the conveyor have small-radius bending ability, so when the conveyor is running and the direction of the conveyor belt needs to be changed sharply at the same time, there is no need to establish a transfer point, which saves the end transfer mechanism compared with the traditional belt conveyor. The failure rate of the entire belt conveyor system is greatly reduced, especially a set of flexible belt conveyors can be used for coal transportation and even material transportation in the whole mine, which greatly simplifies the transportation system and reduces the amount of chamber development. When excavating, it is not necessary to excavate in a straight line, and the inclination of the working face can also be bent through arcs, which reduces the loss of corner coal.

(2) Reliable operation. During the working process of the present invention, the failure of some components does not affect the operation of the whole equipment, and it can work continuously for a long time.

(3) Low power consumption. Because there is almost no relative movement between the material and the conveyor belt, not only the running resistance is small, which is about 1/3 of the scraper conveyor, but also the wear and tear on the cargo are small, and the productivity is high.

(4) The transmission line has strong adaptability. The present invention can be transported with unlimited length theoretically, can be installed in small tunnels, and can also be set up in the sky above ground traffic chaotic and dangerous areas. According to the requirements of the process flow, the flexible belt conveyor can be very flexible to receive materials from one or more points, and can also discharge materials to multiple points or several sections. When feeding to the conveyor belt at several points at the same time (such as the conveyor under the coal bunker of the coal preparation plant) or at any point along the length direction of the belt conveyor to the conveyor belt through uniform feeding equipment, the belt conveyor The machine becomes a main conveying trunk line. This equipment can take materials from the roadway under the stockpile in the coal storage yard, and when necessary, it can also mix different materials in each pile. Material can be unloaded simply from the head of the conveyor, or at any point along the length of the conveyor belt by a plow unloader or a moving unloading vehicle.

Description of drawings

Fig. 1 is a structural schematic diagram of a conveyor applied in a specific embodiment of the present invention.

FIG. 2 is a schematic diagram of the structure viewed from the B direction in FIG. 1 .

Fig. 3 is a schematic diagram of the cross-sectional structure along line A-A of Fig. 1 .

Fig. 4 is a schematic cross-sectional structure diagram of C-C in Fig. 1 .

Fig. 5 is a schematic structural view of each section of conveyor belt corresponding to a specific embodiment of the present invention.

FIG. 6 is a schematic diagram of the D-D structure in FIG. 5 .

FIG. 7 is a schematic diagram of the structure in the P direction of FIG. 5 .

Fig. 8 is a schematic diagram of a conveyor belt assembly structure corresponding to a specific embodiment of the present invention.

Fig. 9 is a schematic diagram of the connection structure of the front and rear conveyor belts corresponding to a specific embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a conveyor belt in a turning state corresponding to a specific embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a transmission sprocket corresponding to a specific embodiment of the present invention.

Fig. 12 is a schematic diagram of the structure viewed from the side E of Fig. 11 .

Fig. 13 is a schematic diagram of the cooperative relationship between the transmission sprocket and the transmission chain. .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

As shown in Fig. 1, Fig. 2 and Fig. 3, an idler arrangement structure applied to a horizontal curved belt conveyor, the idler set 300 arranged under the conveyor belt includes a buffer idler 10, a flat idler 11 And the trough idler 12, the buffer idler 10 is arranged below the charging device 1; the flat idler 11 and the trough idler 12 are arranged at intervals.

The layout of the idler roller spacing should follow the principle that the deflection of the conveyor belt between the idler rollers should be as small as possible. The deflection value of the conveyor belt between the rollers generally does not exceed 2.5% of the spacing between the rollers. The distance between the upper rollers at the loading place should be smaller, the general distance is 200-300mm, and the distance between the lower rollers can be 2500-3000mm, or 6-8 times the distance between the upper rollers. A set of transition rollers should be installed at the head and tail of the loaded branch to reduce the stress on the edge of the conveyor belt in the transition section of the head and tail, thereby reducing the damage to the edge of the conveyor belt. The distance between the center line of the end and the transition roller The distance is generally not greater than 300-400mm.

Among them, the middle part of the flat roller 12a of the plurality of grooved rollers 12 is provided with a transmission groove 15, and the transmission groove 15 is provided with a transmission sprocket 13, which cooperates with the transmission chain 7, and the transmission sprocket 13 is driven by a motor 14 ,As shown in Figure 3. The structure of the transmission sprocket 13 is shown in FIG. 11 and FIG. 12 , and the matching relationship between the transmission sprocket 13 and the transmission chain 7 is shown in FIG. 13 .

The motor 14 drives the coupling, and the coupling drives the hydraulic coupler 20. The hydraulic coupler has its own deceleration device. The gear 21 output through the deceleration device and the transmission sprocket 13 mesh with each other, and the transmission sprocket 13 pulls the transmission of the conveyor belt. The chain 7 thus drives the entire conveyor.

As shown in Figure 4, a turning idler 15 is arranged at the turning point of the conveyor belt and below the upper conveyor belt. 15a and the inner idler roller 15b are both provided with a steering gear 16 that cooperates with the side chain 8 .

The middle part of the flat idler 15b of the turning idler 15 is provided with a transmission groove, and a transmission sprocket is arranged at the transmission groove, and the transmission sprocket is driven by a motor and cooperates with a transmission chain. The motor drives the coupling, and the coupling drives the hydraulic coupling. The hydraulic coupling has its own deceleration device. The gear output through the deceleration device and the transmission sprocket mesh with each other, and the transmission sprocket pulls the transmission chain 7 of the conveyor belt.

At the turn, the ratio of the turning radius of different parts of the conveyor belt is equal to the ratio of the radius of the idler roller corresponding to the location of the conveyor belt.

As shown in FIG. 1 and FIG. 2 , the conveyor to which the above idler arrangement structure is applied includes a frame 100 , a conveyor belt 200 and an idler roller set 300 arranged below the conveyor belt. One end of the conveyor belt is provided with a loading device 1 and the other end is provided with an unloading device 2 . Near the unloading device 2 side, a cleaning device 18 is arranged below the conveyor belt.

As shown in Figures 5 to 7, the conveyor belt is a multi-section split structure, and each section of the conveyor belt includes a rectangular body 3, and a fan-shaped rack mounting part 4 extends symmetrically from the left and right of the tail of the body. The fan-shaped concentric I-shaped rack 5 is provided with an I-shaped tooth groove 6 corresponding to the rack 5 at the front end of the body.

The bottom center of the body is provided with a transmission chain 7, the transmission chain passes through the bottom centerline of the belt, and is bonded with the belt by thermal vulcanization or other effective bonding methods. The body is provided with a front connecting hole 3a at the front end of the transmission chain 7, and a rear connecting hole 3b at the rear end of the chain. The left and right sides of the main body are all provided with side chains 8, and the connection method between the side chains 8 and the conveyor belt is the same as that of the transmission chain 7.

As shown in FIG. 5 , the central angle a of the rack mounting portion 4 is smaller than the central angle b of the rack 5 .

As shown in Fig. 8, the cogs 6 of the conveyor belt of the previous section cooperate with the tooth rails 5 of the conveyor belt of the latter section to form a flexible whole in the straight section. As shown in Figure 9, upper and lower connecting bars 19, bolts 9 and nuts are arranged at the rear connection hole 3b of the preceding section of conveyor belt and the front connection hole 3a of the rear section of conveyor belt; the diameter of bolt 9 is smaller than that of the front connection hole 3a and the rear connection The diameter of the hole 3b, so that the connection part can rotate around the bolt as the axis.

Because this equipment is driven by the transmission chain through the center of the idler roller and the conveyor belt, there is no need to set friction rollers and tensioning devices at the head and tail of the machine. But in order to protect the rack and the tooth groove of the conveyor belt, the head and tail can be provided with a reversing drum 17, and the diameter of the drum should be as large as possible.

When the conveyor is working, the material is sent from the loading device 1 to the conveyor belt, then transported by the conveyor belt to the unloading device 2, and then sent away from the transfer device 23. The power of the conveyor belt is provided by the drive chain in the center of the bottom of the belt. The machine drives the coupling, the coupling drives the hydraulic coupler, and the hydraulic coupler has its own deceleration device. The gear output through the deceleration device and the transmission sprocket in the middle of the drive roller bite each other, and the transmission sprocket pulls the chain of the conveyor belt. Thereby driving the whole conveyor. At the end of the transportation, a motor with higher power is arranged to pull and straighten the entire conveyor belt, so that the chain becomes the stress body of the entire belt, which can be regarded as the tensioning device of the traditional belt conveyor. When the motor starts and stops, the impact is greatly alleviated by the hydraulic coupling. In the respective traction sections of the two motors, if the loads are different or the slopes are different, resulting in different running resistances, the hydraulic coupling can also make the running speed of the entire conveyor belt even and stable.

As shown in Figure 4 and Figure 10, the arrow indicates the direction of material movement. When turning, the turning radii of four special points A, B, C, and D are R1, R2, R3, and R4 respectively, and the linear speeds of each point are V1, V2, V3, and V4 respectively. If the diameters of the idlers at the corresponding positions are r1, r2, r3, r4, then r1: r2: r3: r4 = R1: R2: R3: R4. The idler roller guides the turning, and the transmission sprocket in the middle of the idler roller guides the chain. At the same time, the idler rollers at different positions have different radii, so that the speed provided to the conveyor belt at this position forms a difference, the inner side is slow, and the outer side is fast. Under the combined action of the friction force of the roller and the meshing of the gears on both sides and the side chain 8, the outer steering gear drives the outer side of the conveyor belt at a linear speed V1 to advance at a speed ΔV higher than that of the middle chain, and the inner steering gear drives the conveyor belt at a linear speed V2 The inner side of the belt advances at a speed lower than the chain speed ΔV, forcing the section of the conveyor belt to turn and advance along the tangential direction of the turning arc. The horizontal distance between the racks on both sides of the conveyor belt is L, and the radius of curvature of the chain rotation is R, so the formula ΔV=VL/R is satisfied, that is, the angular velocity w=V1/R1=V2/R2=V3/R3=V4/R4. This design can make the angular velocity of each part of the conveyor belt consistent, reduce the force on the belt, and prolong the service life of the belt.

As shown in Figure 5 and Figure 10, when turning, the front and rear sections of the conveyor belt head turn over a radian difference of a, the outer tail of the conveyor belt is exposed, and the inner tail is squeezed into the bottom of the rear section of the belt. When the tail of the belt extends out to an angle b, start to set the rack, the rack rotation angle is c, b>a and c>a, the rack is always inside the tooth slot and will not be exposed. Both the conveyor belt and the chain itself have a certain degree of flexibility. The sprockets are equipped with guide grooves, and the chain and the sprocket are always engaged, gradually guiding the traction chain, and assisting in adjusting the direction, so that the conveyor belt can complete the steering until it returns to the straight-line transportation state.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (2)

1. a kind of idler arrangement structure that is applied to horizontal curved belt conveyor, described conveyor comprises frame (100) and conveyer belt (200); Described conveyer belt one end is provided with charging device (1), and another One end is provided with a discharge device (2); it is characterized in that: the set of idlers (300) arranged below the conveyor belt includes a buffer idler (10), a flat idler (11) and a grooved idler (12 ); The buffer idler (10) is arranged below the charging device (1); the flat idler (11) and the grooved idler (12) are arranged at intervals; Wherein, the middle part of a plurality of said flat rollers (11) is provided with transmission grooves (15), or/and the middle part of the flat rollers (12a) of a plurality of said trough rollers (12) is provided with transmission grooves ( 15); the drive slot (15) is provided with a drive sprocket (13); the drive sprocket (13) is driven by a motor (14); A turning idler (15) is arranged at the turning of the conveyor belt; the turning idler (15) is a grooved idler structure, and its outer idler (15a) is higher than the inner idler (15c); the outer idler (15a) and the inner idler roller (15b) are all provided with the gear (16) that cooperates with described side chain (8); At the turning, the ratio of the turning radius of different parts of the conveyor belt is equal to the ratio of the radius of the idler roller corresponding to the position of the conveyor belt. 2. The idler arrangement structure applied to the horizontal curved belt conveyor according to claim 1, characterized in that: the middle part of the flat idler of the turning idler (15) is provided with a transmission groove, and the transmission groove is provided with There is a drive sprocket, which is driven by an electric motor.