JP2820237B2 - Carrier roller abnormality detection device for belt conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormality of a carrier roller of a belt conveyor, and more particularly to an apparatus for detecting an abnormality of a carrier roller of a belt conveyor which can quickly detect an abnormality of a carrier roller in a long distance conveyor.

[0002]

2. Description of the Related Art Generally, a plurality of carrier rollers for supporting a transfer belt are arranged in a belt conveyor along a transfer direction. These carrier rollers include an upper carrier roller that supports a transport-side belt and a lower carrier roller (return roller) that supports a return-side belt. As a result, defects such as wear damage are likely to occur. Abrasion damage to the carrier roller not only significantly reduces the durability of the transport belt, but also generates abnormal noise and may inconvenience surrounding residents. Therefore, the abnormal carrier roller must be discovered and replaced at an early stage.

[0003]

Problems to be solved by the present invention, however, are based on the empirical insight of the patrol roller for finding the abnormality of the carrier roller. Particularly, a conveyor having a long transfer distance (long distance conveyor) is equipped with a large number of carrier rollers. Therefore, it was extremely difficult work for maintenance. In addition, since such patrols are generally performed in a severe working environment in relation to a conveyor installation place, automation and labor saving by a device capable of detecting an abnormality at an early stage have been desired.

Therefore, it is conceivable to install a sensor for detecting an abnormality in each of the carrier rollers of the belt conveyor to meet these demands. However, in this case, the production cost is high and the sensor is liable to be broken down due to vibration or the like. There is a problem.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is possible to quickly and easily detect an abnormality of a carrier roller without requiring any manual operation, and to provide a durable and inexpensive belt conveyor carrier. It is intended to provide a roller abnormality detecting device.

[0006]

According to the present invention, there is provided a belt conveyor having a plurality of carrier rollers arranged along the transport direction, the belt being provided along the transport direction on a side portion of the belt conveyor. A microphone is installed on the pipe, and the traveling sound of the carrier roller is collected.

[0007]

According to the detecting device of the present invention, the traveling sounds of the plurality of carrier rollers are captured in the pipe installed on the side of the belt conveyor, and transmitted to the microphone via the air in the pipe. The traveling sound of the carrier roller collected by the microphone is converted into an electric signal and recorded on a recorder via an amplifier. The carrier roller that has become abnormal due to wear or breakage generates loud noise that is clearly different from the normal running noise of the carrier roller. Therefore, by detecting the traveling noise of the carrier roller, the abnormality of the carrier roller can be efficiently detected.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. 1 and 2 are schematic diagrams showing an example of the apparatus for detecting an abnormality of a carrier roller of a belt conveyor according to the present invention, and FIGS. 3 and 4 are views showing an example of a method of attaching a microphone. Reference numeral 1 denotes a belt conveyor. The belt conveyor 1 includes a belt wheel (not shown) provided at both ends of the frame 2 in the longitudinal direction, a transfer belt 3 in an endless environment wound around these belt wheels, and a belt 3, a carrier roller 5 rotatably provided on the upper side of the frame 2 at appropriate intervals along the longitudinal direction thereof via a carrier stand 4 to support the transport side 3a, and a frame for supporting the return side 3b of the belt 3. 2 and a return roller 6 rotatably provided at an appropriate interval along the longitudinal direction below the return roller 6.

A long pipe 8 is provided on one side of the frame 2 along a longitudinal direction of the frame 2 via a support metal 7 (transmission plate), and a microphone 9 is installed on the pipe 8. Although various steel pipes can be used for the pipe 8, a conduit pipe can be suitably used because of its good sound transmission sensitivity. The length of the pipe can be appropriately determined according to the length of the conveyor 1. However, up to about 200 m, the microphone 9 is installed at the center or the end of the pipe 8 so that the traveling sound of the carrier roller 5 is sufficiently collected. can do. If the conveyor 1 is longer, the pipes 8 are connected in series, and microphones 9 are attached to the pipes 8 at intervals of 80 to 120 m, so that a long distance conveyor can be supported. The diameter of the pipe 8 is desirably about 50 to 100 mm, preferably 60 to 80 mm in consideration of the installation of the microphone 9 and the sound collecting effect.

The support metal 7 is attached between the frame 2 and the pipe 8 by welding or screwing, and serves as a transmission plate for supporting the pipe 8 and transmitting the running sound of the carrier roller at the same time. If a metal wire 10 such as a piano wire is connected to the carrier roller stand 4 and the pipe 8, the transmission sensitivity of the carrier roller traveling sound can be further improved.

The microphone 9 is attached to the center or one end of the pipe 8 as shown in FIGS.
Although it is sealed by 3, it is preferable to install at both ends of the pipe 8 when it is desired to specify the abnormal carrier roller more accurately. The noise of the carrier roller 5 is transmitted to the pipe 8 via the support metal 7 and the metal wire 10 and transmitted to the microphone 9 via the internal air. Since the pipe 8 is sealed and the inside air is isolated from the outside, the sound is hardly transmitted to the outside, and the outside noise is not taken in. Therefore, only the traveling sound of the carrier roller can be clearly collected. The position of the microphone 9 can be set at an appropriate interval other than the center, one end, or both ends of the pipe 8.

When the conveyor 1 is in operation, the carrier roller 5 generates vibration noise and heat due to rotation and friction, but the worn or damaged abnormal carrier roller 5 is physically compared with a normal one. The present invention detects these as abnormal signals.
When the conveyor 1 is operated, the traveling sound of the carrier roller collected by the pipe 8 via the supporting hardware 7 and the metal wire 10 is detected as an electric signal by the microphone 9 installed at the center or one end of the pipe 8 and amplified by the amplifier 11. Then, it is recorded in the recorder 12. The normal carrier roller and the abnormal carrier roller obviously have different noise levels. For example, in a belt conveyor 1 having a width of 1600 mm for transporting limestone of 2000 to 3000 t / h,
A normal carrier roller normally and stably generates a noise of about 77 dB to 78 dB.
It was found that it fluctuated vigorously between 0 and 90 dB. Also, the distance of the abnormal carrier roller from the microphone 9 can be roughly determined from the magnitude of the noise. Although there is no problem in replacing the abnormal carrier roller, if it is desired to clearly identify the abnormal carrier roller, for example, microphones 9 are installed at both ends of the pipe 8 and the difference in the noise level is converted into a distance by an arithmetic processing unit. It is also possible to specify an abnormal carrier roller. As a result, the abnormality of the carrier roller can be detected quickly and easily, and the abnormal roller can be replaced immediately.

[0013]

According to the present invention, a carrier roller abnormality detecting device can be manufactured at a low cost without the need for a large-scale device or sensor simply by attaching the pipe 8 and the microphone 9 to a conventional belt conveyor. Excellent durability because it does not come into direct contact with sources such as vibration. Further, the abnormality of the conveyor carrier roller 5 can be detected quickly and easily without performing the patrol, and at the same time, it is possible to investigate many carrier rollers, so that automation and labor saving can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an embodiment of the present invention.

FIG. 3 is a microphone installation diagram.

FIG. 4 is a microphone installation diagram.

[Explanation of symbols]

 1 Belt Conveyor 2 Frame 3a Belt 3b Belt 4 Carrier Stand 5 Carrier Roller 6 Return Roller 7 Support Hardware (Transmission Plate) 8 Pipe 9 Microphone 10 Piano Wire 11 Amplifier 12 Recorder 13 Sealing Member

Claims (6)

(57) [Claims] In a belt conveyor having a plurality of carrier rollers arranged along a transport direction, a microphone is installed on a pipe provided along a side of the belt conveyor along the transport direction, and the traveling of the carrier rollers is performed. A carrier roller abnormality detection device for a belt conveyor, which collects sound. 2. The apparatus according to claim 1, wherein the microphone is installed at one end of the pipe. 3. The apparatus according to claim 1, wherein the microphone is installed at a center of the pipe. 4. The apparatus according to claim 1, wherein the microphones are installed at both ends of the pipe. 5. The apparatus according to claim 1, wherein the pipe is provided via a metal support attached to a belt conveyor frame. 6. The carrier roller abnormality detecting device for a belt conveyor according to claim 1, wherein the pipe is connected to a carrier roller stand via a metal wire.