CN103482309A - Anti-slip and deviation-preventing belt conveyor - Google Patents

Abstract

The invention provides a belt conveyor capable of preventing slippage and deviation. The belt conveyor can properly tension the conveyor belt and provide deviation correction force for the conveyor belt through the reasonable structure of the tensioning mechanism and the roller group mechanism, which can prevent the conveyor belt from slipping on the roller and reduce the friction of the conveyor belt between the rollers. Running resistance, preventing conveyor belt deviation, etc. The belt conveyor includes a conveyor belt, a head frame, an intermediate frame, a tail frame, a driving device, a driving drum, a reversing drum, a tail drum, a feeding device, an unloading device, a trolley-type weight tensioning device and an idler roller set , and the set of rollers includes trough-shaped forward-sloping rollers, transition rollers and centripetal adjustment rollers.

Description

A Belt Conveyor with Anti-slip and Deviation

technical field

The invention relates to the technical field of material conveying machinery, and more specifically, relates to a belt conveyor capable of preventing slippage and deviation.

Background technique

Belt conveyor, also known as belt conveyor, is the most efficient and most widely used continuous conveying machinery, and is widely used in various industrial productions. For example, the belt conveyor is the main conveying equipment of the coal conveying system of the power plant at present. In large and medium-sized coal-fired thermal power plants, the conveying equipment used for conveying coal from the coal mine to the unloading device of the power plant and the coal storage yard to the raw coal bunker of the boiler The main one is the belt conveyor, and in recent years it has developed to undertake off-site transportation, that is, the belt conveyor is used to directly transport raw coal from the coal mine or the wharf to the power plant. The use of belt conveyors to transport materials has a series of advantages and high efficiency compared with other methods, and its high degree of automation represents the development direction of modern logistics technology. Correspondingly, the structural layout, use safety, reliability, continuity and efficient operation of the belt conveyor will directly affect the production cost of the power plant.

The belt conveyor consists of the following parts: conveyor belt (usually called belt), idler roller, head frame, intermediate frame, tail frame, driving device, roller, tensioning device, unloading device, cleaning device and safety protection device, etc. . Figure 1 shows the main structure of the belt conveyor, including: conveyor belt 101, idler roller 102, driving drum 103, redirecting drum 104, tail drum 105, tensioning drum 106, tensioning counterweight 107 and feeding device 108. Wherein, the main part of the belt conveyor is the conveyor belt 101, also known as the belt, and the conveyor belt doubles as a traction mechanism and a load-bearing mechanism. The conveyor belt 101 winds around the driving drum 103, the tail drum 105 and the redirecting drum 104 of the machine tail to form an infinite endless belt. When working, the transmission roller 103 drives the conveyor belt to run through the friction between it and the conveyor belt 101, and the material is loaded onto the conveyor belt from the loading point to form a continuous moving logistics, and is unloaded at the unloading point. General material is to be loaded on the top of the upper belt (carrying section) of conveyor belt 101, unloaded at the nose drum (here, namely drive drum 103), utilizes special unloading device and also can be unloaded in the middle. The upper and lower parts of the conveyor belt are supported on the roller 102. The upper belt of the fuselage of the ordinary roller belt conveyor is supported by grooved rollers to increase the cross-sectional area of the flow, and the lower belt is the return section ( unloaded empty belt), generally the lower idler is a flat idler. The tension counterweight 107 gives the conveyor belt the required tension for normal operation.

During the working process of the existing belt conveyor, the conveyor belt often encounters the problem of slipping. The slipping is mainly due to the insufficient tension of the conveyor belt, which causes it to slip on the driving pulley that provides the driving force. At the same time, insufficient tension will increase the running resistance of the conveyor belt between the idlers. The tensioning system of the belt conveyor has the functions of preventing the conveyor belt from slipping on the driving roller and reducing the running resistance of the conveyor belt between the rollers. The function of the tensioning device is mainly reflected in the following two aspects: (1) to make the conveyor With sufficient tension to ensure the necessary friction between the conveyor belt and the drive pulley and prevent slipping. (2) Ensure that the tension at each point of the conveyor belt is not lower than a certain value, so as to prevent the excessive relaxation of the conveyor belt between the two idlers, which will cause material spreading and increase running resistance. However, due to various reasons such as load-bearing changes, temperature changes, and wear and tear, the length of the conveyor belt will naturally change, and the existing tensioning device cannot adapt to the length change of the conveyor belt, resulting in the inability to tension the conveyor belt well. role.

On the other hand, because the belt conveyor is affected by various eccentric forces during operation, the center of the conveyor belt will deviate from the center line of the conveyor, resulting in eccentricity. Deviation will cause equipment downtime, material spreading, frame blockage, conveyor belt edge wear, etc. The main causes of deviation are eccentric feeding at the unloading point, installation and manufacturing errors, wind interference, snaking, etc. Combined with the working principle, the theoretical analysis of the conveyor belt deviation problem of the belt conveyor shows that the deviation of the conveyor belt is transmitted to the idler rollers through the conveyor belt, which changes the friction between the idler roller group and the conveyor belt, while the existing The idler structure cannot adapt to the change of friction force, which leads to the problem of deviation.

Contents of the invention

Aiming at the above-mentioned defects in the prior art, the present invention provides an anti-slip and deviation-proof belt conveyor. The belt conveyor can properly tighten the conveyor belt and provide deviation correction force for the conveyor belt through the reasonable structure of the tensioning mechanism and the roller group mechanism, which can prevent the conveyor belt from slipping on the roller and reduce the friction of the conveyor belt between the rollers. Running resistance, preventing conveyor belt deviation, etc.

The belt conveyor according to the present invention includes a conveyor belt, a head frame, an intermediate frame, a tail frame, a driving device, a transmission drum, a redirection drum, a tail drum, a feeding device, and an unloading device, and is characterized in that it also includes:

The car-type heavy hammer tensioning device includes a trolley, a horizontal track, a tension roller, and a weight; the conveyor belt is wound on the tension roller, and the tension roller is fixed on the trolley, and the trolley can move along the The horizontal track slides, and the gravity of the weight pulls the trolley to slide on the horizontal track, thereby tensioning the conveyor belt through the tension rollers fixed on the trolley;

Roller group, including multiple trough-shaped forward-sloping idlers; each trough-shaped forward-sloping idler includes three short idlers, a pair of side pillars and a pair of middle pillars; one of the middle short idlers is fixed horizontally on the Between the above-mentioned pair of central pillars, the left short roller is fixed between the left side pillar and the left middle pillar, and the right short idler is fixed between the right side pillar and the right middle pillar; the left side The axes of the short idler and the right short idler respectively form a specific groove angle with the axis of the middle short idler on the vertical plane where the axis of the middle short idler is located; and, the left short idler, the right The axes of the side short idler rollers are respectively inclined forward at a specific rake angle relative to the vertical plane where the axes of the intermediate short idler rollers are located.

Preferably, the groove angle is 35°, and the forward rake angle is 2°.

Preferably, the trough-shaped forward-sloping idler roller is arranged on the upper side of the conveyor belt for carrying loads, and the lower belt side of the conveyor belt is arranged with parallel idlers.

Preferably, the idler roller set also includes a plurality of transition idler rollers; the plurality of transition idler roller sets are arranged between the driving drum of the belt conveyor and the first trough-shaped forward-sloping idler roller; wherein each The transition roller includes three short rollers, a pair of side pillars and a pair of middle pillars; one of the middle short rollers is fixed horizontally between the pair of middle pillars, and the left short roller is fixed between the left side pillar and the middle pillar. Between the left middle pillars, the right short idler is fixed between the right side pillar and the right middle pillar; the axes of the left short idler and the right short idler are on the axis of the middle short idler The vertical planes on which they are located respectively form a specific groove angle with the axis of the intermediate short idler; and the groove angle of the transition idler is less than or equal to the groove angle of the trough-shaped forward-inclining idler.

Further preferably, in the direction extending from the driving drum to the trough-shaped forward-inclining idler, the groove angle of each transition idler is larger than the groove angle of the previous transition idler by a specific angle.

Further preferably, there are three transition rollers between the driving drum and the first trough-shaped forward-sloping idler, and in the direction extending from the driving drum to the trough-shaped forward-inclining idler, the The groove angles of the three transition rollers are 10°, 20° and 30° respectively.

Preferably, the idler group also includes a plurality of centripetal adjustment idlers; each centripetal adjustment idler includes three short idlers, a pair of side pillars, a pair of center pillars, a groove-shaped upper support plate, A horizontal lower supporting plate and a bearing bracket; wherein the side pillars and the middle pillars are fixed on the groove-shaped upper supporting plate, and the groove-shaped upper supporting plate is rotatably fixed on the horizontal lower supporting plate through the bearing bracket Above; the middle short idler is fixed horizontally between the pair of center pillars, the left short idler is fixed between the left side pillar and the left middle pillar, and the right short idler is fixed on the right side pillar and between the right center pillar.

It is further preferred that one centripetal adjusting idler is provided every 10 of the trough-shaped forward-sloping idlers on the upper belt side of the conveyor belt; One of the centripetal adjustment rollers is provided every five parallel rollers.

Further preferably, the centripetal adjusting idler is respectively provided with tapered idlers between the left short idler and the left side support and between the right short idler and the right side support.

Preferably, the cart-type weight tensioning device further includes a weight tower for increasing the tension stroke.

It can be seen that the belt conveyor of the present invention adopts a car-type heavy hammer tensioning device, which can ensure that the conveyor belt has a constant tension under various conditions, and can automatically compensate for changes in the elongation of the conveyor belt caused by temperature changes and wear. ; The idler group structure of the present invention produces a centripetal correction force to prevent the conveyor belt from running off. Through the present invention, the conveyor belt of the belt conveyor can always maintain moderate tension and correct running position, which can solve the problems of conveyor belt slipping, running deviation, large running resistance, etc., and ensure its reliable and efficient working state.

Description of drawings

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

Fig. 1 is the overall structural representation of existing belt conveyor;

Fig. 2 is a schematic structural diagram of a car-type weight tensioning device according to an embodiment of the present invention;

3A-3C are structural schematic diagrams of a trough-shaped forward-inclining idler according to an embodiment of the present invention;

Fig. 4 is a structural schematic diagram of a transition roller according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a centripetally adjustable idler according to an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings .

The belt conveyor of the present invention comprises a conveyor belt, a head frame, an intermediate frame, a tail frame, a driving device, a driving drum, a reversing drum, a tail drum, a feeding device, and an unloading device. The above structure is the same as that shown in Fig. 1 The structures of the belt conveyors in the prior art are basically the same and will not be repeated here. In order to overcome the disadvantages of the traditional equipment that the tension of the conveyor belt is not easy to maintain and that it is easy to deviate during operation, the belt conveyor of the present invention is further equipped with a trolley-type weight tensioning device and an idler roller group with a reasonable structure and layout. .

Fig. 2 is a structural schematic diagram of a car-type weight tensioning device according to an embodiment of the present invention. The car-type weight tensioning device includes a trolley 201, a horizontal track (not shown), tensioning rollers 202, and a weight (not shown). The conveyor belt is wound on the tension roller 202, and the tension roller is fixed on the trolley 201, and the trolley can slide along the horizontal track, and then the trolley is pulled on the horizontal track by the gravity of the weight Sliding, thereby tensioning the conveyor belt via tension rollers fixed to the trolley. The car-type heavy hammer tensioning device of the present invention uses the weight of the heavy hammer to generate tension, and ensures that the conveyor belt has a constant tension under various conditions, and can automatically compensate for the stretch of the conveyor belt caused by temperature changes and wear. The tensioning roller is fixed on the trolley that can move along the horizontal track, and the trolley is pulled by the gravity of the heavy hammer, so as to achieve the effect of tensioning the conveyor belt. The car-type weight tensioning device has a relatively simple structure and can maintain a constant tension force, whose size depends on the weight of the weight. In addition, a heavy hammer tower is added, which can increase the tension stroke and facilitate the traction of the heavy hammer.

The roller set of the invention includes a plurality of trough-shaped forward-leaning rollers, transition rollers, centripetal adjustment rollers and parallel rollers used in common belt conveyors. Fig. 3A is a front view of the trough-shaped forward-inclining idler of the present invention, Fig. 3B is a side view of the trough-shaped forward-inclining idler, and Fig. 3C is a top view of the trough-shaped forward-inclining idler of the present invention. The trough forward idler is set on the upper belt side of the conveyor belt (that is, the bearing branch), and each trough forward inclination includes three short idlers, which are the middle short idler 301, the left short idler 302 and the short idler roller 303 on the right side. Each trough-shaped forward-leaning idler also has a pair of side posts 304,305 and a pair of center posts 306,307. Wherein the middle short idler 301 is horizontally fixed between the pair of middle pillars 306, 307, the left short idler 302 is fixed between the left side pillar 304 and the left middle pillar 306, and the right short idler 303 is fixed Between the right side pillar 305 and the right middle pillar 307 . As can be seen from Fig. 3A, the axes of the left side short idler 302 and the right side short idler 303 are respectively aligned with the axis of the middle short idler 301 on the vertical plane where the axis of the middle short idler 301 is located. It is a specific groove angle, and the size of the groove angle depends on actual conditions. In this embodiment, the groove angle is set to 35°. For the parallel idler rollers of common belt conveyors (the present invention sets parallel idler rollers on the lower side of the conveyor belt as the return branch), the short idler rollers on both sides are all fixed at the axis of the side pillars. After the improvement of the present invention, the axes of the short idler roller 302 on the left side and the short idler roller 303 on the right side are respectively inclined forward at a specific rake angle with respect to the vertical plane where the axis line of the middle short idler roller 301 is located. In the example, the forward tilt angle is 2°. It can be seen from FIG. 3B that the fixed points of the short idlers on both sides on the side pillar deviate from the central axis of the corresponding side pillar and tilt forward at a certain angle. Further, it can be seen from Fig. 3C that the axes of the left short idler 302 and the right short idler 303 are respectively inclined 2° forward relative to the axis of the middle short idler 301, wherein the V-shaped arrow indicates the forward direction. The trough-shaped forward-leaning roller structure can make the conveyor belt generate a centripetal correction force to prevent deviation.

Transition rollers with groove angles of 10°, 20°, and 30° can be used between the drive roller and the first group of trough-shaped forward-inclining rollers to make the conveyor belt gradually groove. As shown in Figure 4, each transition roller includes three short rollers, a pair of side pillars and a pair of center pillars. One of the middle short idlers 401 is horizontally fixed between the pair of central pillars 404, 405, the left short idler 402 is fixed between the left side pillar 406 and the left middle pillar 404, and the right short idler 403 It is fixed between the right side pillar 407 and the right middle pillar 405; the groove angle formed by the axis of the left short idler 402, right short idler 403 and the middle short idler 401 is 10°. Along the direction extending from the driving drum to the first trough-shaped forward-inclining idler, transition idlers with groove angles of 20° and 30° can be further provided. Transition rollers can reduce the additional stress on the conveyor belt and prevent deviation.

Centripetal adjustment rollers can be further arranged on the upper belt and the lower belt side of the conveyor belt respectively. The distance between the center of the centripetal adjustment roller and the head and tail rollers is 10000mm-15000mm, and one set of self-aligning rollers is placed every 10 sets of trough-shaped forward-sloping idlers in the bearing branch; heart idler. As shown in Figure 5, each centripetal adjustment idler includes three short idlers 501-503, a pair of central pillars 504, 505, a pair of side pillars 506, 507, a trough-shaped upper support plate 508, a horizontal lower Supporting plate 509 and bearing support 510. Wherein the side pillars and the middle pillars are all fixed on the groove-shaped upper supporting plate 508, and the groove-shaped upper supporting plate 508 is rotatably fixed on the described horizontal lower supporting plate 509 through the bearing bracket 510; The short idler 501 is horizontally fixed between the pair of central pillars 504, 505, the left short idler 502 is fixed between the left side pillar 506 and the left middle pillar 504, and the right short idler 503 is fixed on the right Between the side support 507 and the right middle support 505 . The centripetal adjustment rollers are provided with tapered idler wheels 511 between the left short idler and the left side support and between the right short idler and the right side support. The role of the centripetal adjustment idlers is to generate a centripetal force in the friction between them and the conveyor belt, forcing the conveyor belt to return to the center position to prevent deviation.

In summary, the belt conveyor of the present invention adopts a car-type heavy hammer tensioning device, which can ensure that the conveyor belt has a constant tension under various conditions, and can automatically compensate for the tension of the conveyor belt caused by temperature changes and wear. Elongation changes; the structure of the idler group of the present invention produces a centripetal correction force to prevent the conveyor belt from running off. Through the present invention, the conveyor belt of the belt conveyor can always maintain moderate tension and correct running position, which can solve the problems of conveyor belt slipping, running deviation, large running resistance, etc., and ensure its reliable and efficient working state.

The above is only a specific embodiment of the present invention, and the present invention can also be applied to other equipment; the dimensions and quantities in the above description are only for reference, and those skilled in the art can choose appropriate application dimensions according to actual needs , without departing from the scope of the present invention. The protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims (10)

1. A belt conveyor, comprising conveyor belt, headstock, middle frame, tailstock, drive unit, driving drum, reversing drum, tail drum, feeding device, unloading device, is characterized in that, also includes: The car-type heavy hammer tensioning device includes a trolley, a horizontal track, a tension roller, and a weight; the conveyor belt is wound on the tension roller, and the tension roller is fixed on the trolley, and the trolley can move along the The horizontal track slides, and the gravity of the weight pulls the trolley to slide on the horizontal track, thereby tensioning the conveyor belt through the tension rollers fixed on the trolley; Roller group, including multiple trough-shaped forward-sloping idlers; each trough-shaped forward-sloping idler includes three short idlers, a pair of side pillars and a pair of middle pillars; one of the middle short idlers is fixed horizontally on the Between the above-mentioned pair of central pillars, the left short roller is fixed between the left side pillar and the left middle pillar, and the right short idler is fixed between the right side pillar and the right middle pillar; the left side The axes of the short idler and the right short idler respectively form a specific groove angle with the axis of the middle short idler on the vertical plane where the axis of the middle short idler is located; and, the left short idler, the right The axes of the side short idler rollers are respectively inclined forward at a specific rake angle relative to the vertical plane where the axes of the intermediate short idler rollers are located. 2. The belt conveyor according to claim 1, characterized in that, the groove angle is 35°, and the forward inclination angle is 2°. 3. The belt conveyor according to claim 1, wherein the trough-shaped forward-inclining idler roller is arranged on the upper belt side of the conveyor belt for carrying load, and the lower belt of the conveyor belt is a Side set to parallel rollers. 4. The belt conveyor according to claim 1, wherein the set of idlers also includes a plurality of transition idlers; the set of transition idlers is arranged on the driving drum and the first Between a trough-shaped forward-sloping idler; each transition idler includes three short idlers, a pair of side pillars and a pair of central pillars; one of the middle short idlers is horizontally fixed between the pair of central pillars Between, the left short roller is fixed between the left side pillar and the left middle pillar, and the right short roller is fixed between the right side pillar and the right middle pillar; the left short roller, the right The axes of the short idler rollers have a specific groove angle with the axis of the intermediate short idler rollers on the vertical plane where the axes of the intermediate short idler rollers are located; and, the groove angles of the transition idler rollers are less than or equal to the The groove angle of the grooved forward-leaning roller. 5. The belt conveyor according to claim 4, characterized in that, in the direction extending from the drive roller to the trough-shaped forward-sloping idler, the groove angle of each transition idler is larger than that of the previous one The slot angle of the transition idler is increased by a specific angle. 6. The belt conveyor according to claim 5, characterized in that, there are three transition rollers between the driving roller and the first trough-shaped forward-sloping roller, and when extending from the driving roller to the In the direction of the trough-shaped forward-sloping idler, the groove angles of the three transition idlers are 10°, 20° and 30° respectively. 7. The belt conveyor according to claim 1, wherein the set of idlers also includes a plurality of centripetal adjustment idlers; each centripetal adjustment idler includes three short idlers, a pair of side pillars, a pair of central pillars, a trough-shaped upper supporting plate, a horizontal lower supporting plate and a bearing bracket; wherein the side pillars and the middle pillars are all fixed on the trough-shaped upper supporting plate, and the groove-shaped upper supporting plate passes through the The above-mentioned bearing bracket is rotatably fixed on the horizontal lower support plate; the middle short idler is horizontally fixed between the pair of middle pillars, and the left short idler is fixed on the left side pillar and the left middle pillar Between, the short roller on the right is fixed between the right side pillar and the right middle pillar. 8. The belt conveyor according to claim 7, characterized in that, one centripetal adjusting idler is provided every 10 said trough-shaped forward-inclining idlers on the upper belt side of said conveyor belt ; and on the side of the lower belt of the conveyor belt, one centripetal adjustment idler is provided every five parallel idlers. 9. The belt conveyor according to claim 7, characterized in that, the centripetal adjustment idler is between the left short idler and the left side support, and the right short idler and the right side Tapered idler rollers are respectively arranged between the pillars. 10. The belt conveyor according to claim 1, characterized in that, the cart-type weight tensioning device further comprises a weight tower for increasing the tension stroke.

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