Warning device of abnormal operation of belt conveyor

A warning device (1) of abnormal operation of belt conveyor (2) has a pair of rotating mechanisms (10) disposed oppositely at two sides of a conveyor belt (2). The rotating mechanism (10) includes a rotating component (11) and a rotating body 12. The rotating body 12 has a fixed end (121) and a movable end (122). A pair of first sensor switches (20) is disposed on the rotating bodies (12). The first sensor switch (20) emits a first signal when activated and emits a second signal when being triggered. The rotating body (12) triggers the first sensor switch (20) when the conveyor belt (2) is abnormal. The first sensor switch (20) is triggered and emits the second signal for warning.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention generally relates to a belt conveyor, more particular to, a warning device of abnormal operation of belt conveyor.

Description of Prior Art

Belt conveyors are widely used in various kinds of industries such as ports, machinery, cement industry, mining industry, power plants, steel industry and feed storage industry. A conveyor belt is generally composed of rubber belts, idlers and drive wheels. As rubber belts have elastic stretch, it will be elongated naturally after using a period of time. Therefore, users must adjust its tightness frequently. If not, the conveyor belt will get down, and then the efficiency of conveyance will be decreased. In severe cases, the drive wheels will rotate idly and the conveyor belt will be burned due to fixed-point rotation and frictional heat, and that may result in a shutdown or public security accidents.

Furthermore, belt conveyors can be installed at discharge outlets of storage tanks during transporting or to undertake consignments of previous conveyors. However, if there are dropped sharp materials piercing the conveyor belt but the conveyor belt continues running without shutdown, then sharp materials may get stuck on idlers or drive wheels, and the conveyor belt might be cut so that it will not be used anymore and discarded. Therefore, how to detect the transporting processes of the conveyor belt and provide an alarm when abnormal are the motivations of the present inventor.

In view of the above drawbacks, the Inventor proposes the present invention based on his expert knowledge and elaborate researches in order to solve the problems of prior art.

SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to provide a warning device of abnormal operation of belt conveyor, wherein the rotating bodies drive the first sensor switch moved and triggered when conveyed objects pierce out the belt or the belt is got down by overloading; therefore, the first sensor switch will be triggered and emits a second signal so that users can know the abnormal condition and deal with the problem early to avoid serious damages to the conveyor belt.

In order to achieve the object mentioned above, the present invention provides a warning device of abnormal operation of belt conveyor including a pair of rotating mechanisms and a pair of first sensor switches. The rotating mechanisms are disposed oppositely at two sides of the conveyor belt, and each of the rotating mechanisms comprises a rotating component and a rotating body driven by the rotating component. The rotating body has a fixed end connected with the rotating component and a movable end located opposite. The first sensor switches are disposed on the rotating bodies of the pair of the rotating mechanisms respectively. The first sensor switch emits a first signal when activated and emits a second signal when triggered; wherein the rotating body is touched by the conveyed objects stretched out the belt conveyor, and the first sensor switch will be triggered after the rotating body is touched and rotates. The triggered first sensor switch emits the second signal for warning.

Accordingly, an object of the present invention is to provide a warning device of abnormal operation of belt conveyor, wherein the warning device further includes a press rod and a second sensor switch; thus when the press portion is pressed by the conveyor belt got down to a certain position; then the second sensor switch will be triggered and emits a third signal so that users can know the abnormal condition for avoiding serious damages to the conveyor belt.

Compared to the prior art, the warning device of abnormal operation of belt conveyor is performed through the rotating body is touched and rotated for driving the first sensor switch moved so that the first sensor switch will be triggered and press the sensor switch for emitting the third signal when conveyed objects are stretched out the belt conveyor and pass the rotating mechanisms. Thereby, users can know abnormal conditions when the second signal or the third signal are received to avoid serious damages and increase the convenience and practicability of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer toFIG. 1andFIG. 2, they depict a plan schematic view and a partial schematic view of a warning device of abnormal operation of belt conveyor. A warning device of abnormal operation of belt conveyor of the present invention includes a pair of rotating mechanisms10and a pair of first sensor switches20. The pair of first sensor switches20are disposed on the pair of the rotating mechanisms10for detecting conveyed objects (not shown) on a conveyor belt2. If the conveyed objects are sharp materials that might pierce the conveyor belt2and cause damages to the conveyed device. Therefore, the present invention gives a warning before the conveyed objects may cause damages to the conveyor belt2through the deposition of the warning device1of abnormal operation of belt conveyor. More details of the warning device1of abnormal operation of belt conveyor are described as follows.

The warning device1of the present invention includes a pair of rotating mechanisms10. The pair of rotating mechanisms10are disposed oppositely at two sides of the conveyor belt2. Each of the rotating mechanisms10comprises a rotating component11and a rotating body12driven by the rotating component11. The rotating body12has a fixed end121connected with the rotating component11and a movable end122located oppositely.

Moreover, the warning device1of the present invention also includes a pair of first sensor switches20. Each first sensor switches20is disposed on the rotating body12of the rotating mechanism10correspondingly, and the first sensor switch20emits a first signal when activated and emits a second signal when triggered. Besides, the rotating body12is touched by the conveyed objects stretched out the belt conveyor2. The first sensor switches20will be triggered after the rotating body12is touched and rotates, and then the triggered first sensor switch20emits the second signal for warning.

Preferably but not limited, the first sensor switch20is a micro switch, a reed switch, an optical switch or a photo interrupter and so on.

In an embodiment of the present invention, the warning device1includes at least one press rod30and a second sensor switch40. The press rod30is disposed at the movable end122of the rotating body12; the second sensor switch40is disposed at the press rod30and emits a third signal after being triggered. In real practice, the press rod30touches the second sensor switch40in a forward, lateral, or rotational direction.

Specifically, the press rod30has a top end31and a bottom end32opposite. In addition, the press rod30has a press portion311at the top end31, and the second sensor switch40is disposed at the bottom end32. Preferably, the warning device1further includes at least one restoring spring50, and the restoring spring50is sleeved with the press rod30and disposed between the top end31and the press portion311. In real practice, the restoring spring50can be restored in a forward, lateral, or rotational direction.

Therefore, the press portion311triggers the second sensor switch40and emits a third signal after being pressed by an external force (belt deformed). Furthermore, the press portion311can go back to the original position through the restoring spring50after the external force is removed.

In further, the rotating mechanism10further includes a position base13, and the rotating component11is disposed at the position base13. In the present embodiment, the rotating component11is a hinge, and the rotating body12includes a plate123. Thus, the hinge can take the plate123rotating after the plate combining to the hinge. Similarly, the hinge will be rotated when the plate123is touched. In real practice, the implement of the rotating component11and the rotating body12can be changed just to achieve intended functions.

Preferably, the rotating body12further includes an extension plate124and a positioning mechanism125. The extension plate124can be detachably combined in an outer side of the plate123through the positioning mechanism125.

Please refer toFIG. 3, it depicts an assembly schematic view of a rotating body of the present invention. In the present embodiment, the plate123is provided with a plurality of first positioning portions1251. Besides, the extension plate124is provided with a plurality of second positioning portions1252. The first positioning portions1251can be selectively positioned at a predetermined second positioning portion1252for adjusting the overall length of the plate123and the extension plate124after combining, and that is the length of the rotating body12. Therefore, the length of the rotating body12can be adjusted according to the usage of conveyor belt2.

It is worth noting that the rotating bodies12of the pair of the rotating mechanisms10have formed with a concave area120separately, preferably but not limited, the concave area120is an arc opening. In addition, the conveyor belt2is disposed in the concave areas120between the pair of the rotating mechanisms10, and then the conveyor belt2can be adjusted to be located above the pressing rod30according to the concave areas120. Therefore, when the conveyor belt2is in a loosen state and got down, the pressing portion311of the top end31of the pressing rod30will be pressed to trigger the second sensing switch40for emitting a signal.

Please also refer toFIG. 4, it depicts a schematic view of the use of the warning device of abnormal operation of belt conveyor of the present invention. In the present embodiment, when the conveyed object is stretched out the belt conveyor belt2and pass through the rotating mechanism10, the rotating body12will be touched and rotates. In addition, the first sensor switches20moves with the rotating body12; at this moment, the first sensor switches20are activated and emit the second signal. In real practice, the second signal can be transmitted to a control system to generate an alarm so that the user can know the abnormal condition and deal with the problem early to avoid serious damages to the conveyor belt2.

Please further refer toFIG. 5andFIG. 6, they depict a partial enlarge schematic view and another operation schematic view of the warning device of abnormal operation of belt conveyor of the present invention. As shown in FIGs, when the conveyor belt2is loosen after using a period of time or deformed due to heavy conveyed objects, the press portion311of the press rod30will be pressed by the conveyor belt2because the conveyor belt2is got down to a certain position. At this moment, the second sensor switch40is activated and emits the third signal after the press portion311is pressed by an external force (belt deformed). In real practice, the third signal can be transmitted to a control system to generate an alarm so that the user can know the abnormal condition and deal with the problem early to avoid serious damages to the conveyor belt.

It is worth noting that the implementation of the rotating mechanism10of the present invention can be adjusted according to requirements. In the present embodiment, the rotating bodies12of the pair of the rotating mechanisms10are disposed in a direction perpendicular to a forward direction of the conveyor belt2(as shown inFIG. 4).

Please also refer toFIG. 7toFIG. 9, they depict another three embodiments of the warning device of abnormal operation of belt conveyor. As shown inFIG. 7andFIG. 8, the rotating bodies12of the pair of the rotating mechanisms10are arranged at an angle with each other. InFIG. 7, the pair of the rotating bodies12and the conveyor belt2are configured in an inverted V-shape. In addition, inFIG. 8, the pair of the rotating bodies12and the conveyor belt2are configured in a V-shape. Furthermore, inFIG. 9, the pair of the rotating bodies12and the conveyor belt2are disposed at an angle with respect to a forward direction of the conveyor belt2. In real practice, the angle and the position of the pair of the rotating bodies12with respect to the conveyor belt2can be adjusted depend on needs.