FI76042C - Device for opening conveyor pipes on a pipe conveyor - Google Patents

Description

1 76042

The present invention relates to an apparatus for opening a conveyor tube in a conveyor belt conveyor, wherein the conveyor tube is formed of a helically arranged flat belt.

5 A pipeline belt conveyor is known from Finnish patent application 830012. wherein the conveying tube is formed of a helically positioned flat belt. The application also discloses an apparatus for opening the transport tube of such a conveyor. Although this opening device operates on a small scale, as the size of the conveyor increases, more and more forces are applied to the opening device 10, which also requires greater durations of force components from the opening device.

The object of the present invention is to obviate the disadvantages of the prior art and to provide a better and more reliable apparatus for opening a helical conveyor belt tube using an opening roller system formed of a roller group and possible conveyor belt control devices located in the direction of belt travel. The essential features of the invention appear from the appended claim 1.

20

According to the invention, the opening of the conveying tube formed by the helical flat belt is performed by causing a rotating movement in the conveying tube by friction rollers placed in the opening roller, which causes the conveying effect of the conveying tube in the thread. The roller consists of at least one group of preferably four rollers, which are arranged relative to the position of the thread, preferably in order to enhance the unwinding of the thread. In order to prevent the rotation of the transport tube caused by the opening roller, possibly excessive, a guide device can be placed after the opening roller, in which a counter force is applied to the edge of the belt formed by the external thread by switching the guide device in the opposite direction to the belt. In addition to the opening roller and the anti-rotation control device, it is then possible to install one or more pressing devices in the direction of travel of the belt, which press the belt from the opened tube close to the planar belt shape mechanically into the final flat belt shape.

76042

The rotation of the transport tube, which is important for the operation of the apparatus according to the invention, can also be achieved by placing a helical spring, for example a coil spring, on the rollers. In this case, however, the tendency of the conveying spring to move sideways due to the coil spring must be prevented by special control devices.

The invention will be described in more detail below with reference to the accompanying drawings, in which Figure 1 schematically shows a preferred embodiment of the invention in an axonometric pattern between the opening roller and the rotating drum 10.

Fig. 2 schematically shows a second, preferred embodiment of the invention in an axonometric pattern between the opening roller and a rotating drum, Fig. 3 schematically shows a different embodiment of the invention in an axonometric pattern between an opening roller and a rotating drum.

According to the dry 1, a roller 2 with friction rollers 3 for the sides of the pipe 1 is mounted around the conveyor tube 1. The rollers 3 cause a rotational movement of the conveyor tube 1, which causes the thread of the conveyor tube 1 to unwind to form a substantially planar conveyor belt 4.

In order to enhance the unloading of the conveying tube 1 in a substantially short distance, pressure rollers 5 are mounted after the rollers 3 with respect to the direction of travel of the conveyor, which press the edges of the conveyor belt 25 4 obtained from the conveying tube 1 substantially close to the planar shape. The pressure roll 5 can advantageously also act as a one-piece roller, as shown in Fig. 3. Fig. 1 further shows the conveyor rotation drum 6 and the conveyor rotation roller 7 closest to the drum 6.

In the embodiment according to Figure 2, instead of the printing rollers 5, a stapling device 8 is arranged both above and below the belt 4, by means of which the belt 4 can be made substantially planar. It is also possible to place both the printing roll 5 and the stapling device 8 for bending the same conveyor belt.

Il 3 76042

In order to prevent excessive rotation of the conveyor tube 1 caused by the rollers 3, a roller 9 is mounted after the rollers 3 in the direction of travel of the tube, as shown in Fig. 3, the effect of which is preferably applied to the edge of the belt 1 as an external thread of the conveyor tube 1.

The roller 9 is caused to rotate in the opposite direction to the direction of travel, whereby the roller 9 slows down the passage of the conveying tube 1. The angle of the rollers 3 with respect to the thread of the conveyor tube 1 is preferably set so that, despite the variations in friction conditions, the discharged outer thread of the conveyor tube 1 remains in the roller 9. Figure 3 also shows .

In the above figures, preferred embodiments of the invention have been described without support structures for the conveyor and control devices, as well as drive devices. However, it is clear that the practical implementation of the invention requires support structures to which the control devices can be attached and in which it is possible to place the necessary operating devices of the control devices. Furthermore, although Figures 1 to 3 show a certain location for different guide devices to enable the apparatus according to the invention to open a conveyor tube formed of a conveyor belt, the positions of the guide devices 20 can at least relatively move relative to each other, for example according to conveyor belt stiffness. In addition, the shape and number of control devices can vary substantially depending on the size of the pipe belt conveyor used and, for example, the material to be transported.