JP5661317B2 - Transport device - Google Patents

Description

  The present invention relates to a conveying device such as a belt conveyor in which a plurality of rollers having rolling bearings are installed.

  In a belt conveyor facility in which a plurality of rollers having rolling bearings are installed, the rollers and the conveyor belt operate in contact with each other. Therefore, smooth operation of the bearing accompanying normal rotation of each roller is indispensable. When the roller or its bearing is deteriorated or damaged due to its life or the like, normal rotation of the roller is hindered, and maintenance including inspection, inspection and replacement of the roller of the belt conveyor facility is important.

  For example, in a thermal power plant, a belt conveyor is frequently used to convey coal used for fuel. As an example, coal that has been carried by a coal carrier is landed on a belt conveyor by a coal lift. In addition, coal is sent to a coal yard by a belt conveyor and piled up (coal storage). When consumed, the coal is sent from the coal yard to a boiler by a belt conveyor.

  The boiler is normally continuously operated in terms of power supply and fuel efficiency, and the belt conveyor is always in operation. Such a belt conveyor includes a roller driving unit, a driving roller, a conveyor belt, and a plurality of driven rollers that are intermediate the belt conveyor and support the conveyor belt. The roller driving unit transmits power to the driving roller and operates the conveyor belt by rotating the driving roller. Since the plurality of rollers in the middle of the belt conveyor have bearings therein to support the conveyance belt, each of them is rotated with the movement of the conveyance belt in operation.

  Since such a belt conveyor is provided in a plurality of units, several hundreds of intermediate rollers supporting the conveyor belt are provided. If the drive roller is abnormal due to deterioration or damage, the belt conveyor device is stopped, so it is necessary to constantly monitor the drive roller. Therefore, the drive roller constantly monitors changes in temperature and vibration, such as attaching a temperature sensor and a vibration sensor.

  On the other hand, a plurality of rollers that support the conveyance belt in the middle of the belt conveyor are not managed as finely as the drive rollers because of the large number of rollers. Further, even if one or more arbitrary intermediate rollers have a rotation abnormality, they can be operated by a large number of normally rotating rollers.

  However, when the roller or its bearing is deteriorated or damaged during the operation of the belt conveyor, the roller with abnormal rotation continues to transmit frictional heat due to contact with the conveyor belt to the conveyor belt. Abnormal heating of the conveyor belt can cause a belt conveyor fire.

  Therefore, each roller is designed to be replaced at a safer time before the rated bearing life has passed since the previous replacement record. In other words, among the rollers to be replaced, there are still rollers that can be used normally without definite deterioration or damage in the rollers or their bearings. In this case, the replacement of the rollers can be performed without stopping the belt conveyor by taking appropriate measures.

  Conventional measures to prevent belt conveyor fires include technology that detects changes in the intensity of light passing over the belt conveyor due to gas disturbances or smoke caused by the occurrence of high-temperature parts while the belt conveyor is stopped, and an infrared sensor. There is a technology having a function of detecting a high temperature part during belt conveyor operation (see Patent Document 1). According to such a technique, abnormal heat generation points such as a belt conveyor drive motor and a roller can be detected, and danger can be prevented by warning or stopping the belt conveyor in operation.

Japanese Patent No. 188109

  The technology for detecting a high temperature portion of a belt conveyor according to Patent Document 1 requires a considerable cost when newly incorporated into an existing belt conveyor apparatus in a thermal power plant, for example. Further, it is supposed that a heat generation location can be specified from the history data of heat generation of the belt during operation of the belt conveyor. However, there is a concern that it is difficult to specify an abnormal part (abnormal roller) in a plurality of rollers that are in the middle of an operating belt conveyor and support a conveyance belt.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a transport device that can easily detect vibrations and abnormal heat generation of each operating roller by simply adding an inexpensive configuration to an existing device.

  In the operation of a belt conveyor device in which a plurality of rollers for supporting a conveyor belt are installed, the present inventors reduce the number of rotations even if the rollers or their bearings are deteriorated or damaged due to their service life or the like even if they try to rotate normally. I emphasized that. That is, paying attention to a decrease in the number of rotations of the roller that causes an increase in the amount of heat generation, the following conveying device is provided.

  (1) A roller driving unit, a driving roller to which power from the roller driving unit is transmitted, a conveying belt that is movable in a predetermined direction by rotating the driving roller by the roller driving unit, and the conveying belt A plurality of rollers that are rotated in accordance with movement of the conveying belt in the conveying direction, and colors that change in appearance according to changes in the number of rotations of the rollers attached to the side surfaces of the plurality of rollers. And a monitored part having a pattern.

  According to the transport device of (1) above, a monitored portion having the same color and pattern may be attached to each of the plurality of rollers to be monitored and compared that should be rotated at the same number of rotations. preferable. In the plurality of rollers, when there is no rotation abnormality roller such as a rotation failure or abnormal vibration during the operation of the apparatus, all the monitored parts exhibiting the same change pattern are observed. However, when an arbitrary roller (or its bearing) of the plurality of rollers deteriorates or is damaged, the number of rotations decreases by that arbitrary roller, and the change in the monitored portion is different from other normally rotating rollers. Presents a pattern.

  In the transport apparatus of (1) above, it is preferable that the monitored unit attaches the same color and pattern to a plurality of rollers to be monitored and compared, and simply adds to the existing transport apparatus. Therefore, at least one of the following aspects (2) and (3) is included.

(2) The monitored portion is provided with the same color and pattern on each predetermined roller using at least one of a water-based paint, a resin-based paint, and a fluorescent paint.
(3) The monitored part includes a pasting member.

  In the above conveying devices (1) to (3), it is possible to make a rational determination as in the following (4) for a plurality of rotating rollers, thereby contributing to the maintenance of the conveying device.

  (4) During operation in which the plurality of rollers rotate, the monitored unit having a reduced number of rotations is second compared to the roller in which the monitored unit is rotating with the first change pattern. It is considered that the amount of heat generation is increased in the roller rotating with the change pattern.

  According to the transport device of (4) above, the roller whose rotational speed is decreasing continues to be rotated while being dragged by the transport belt moving based on the normal transport speed. In addition, the amount of heat generated increases due to friction in a deteriorated or damaged bearing.

  Therefore, in order to utilize the monitored part more functionally, the transport device includes the following transport device (5).

  (5) The conveyor belt is a conveyor belt that conveys a combustible material. During operation, the plurality of rollers have a standard rotational speed according to the conveyance operation of the conveyor belt based on the rotation of the drive roller. A roller that rotates with the first change pattern on the monitored portion, and is rotated by several tens of percent from the standard rotational speed. Based on the non-standard rotation speed, the roller that rotates while presenting the second change pattern in the monitored portion is identified as a replacement target.

  According to the transport device of (5) above, the change patterns presented by each monitored unit are compared for a plurality of operating rollers, and a roller rotating at a non-standard rotation speed is specified. The identified roller is determined not to function normally and is subject to replacement.

  Further, in any one of the above-mentioned transfer devices (1) to (5), the following transfer device (6) is included as an efficient system when there are a plurality of units.

  (6) The transport device is provided with a plurality of units, and the first transport device and the second transport device among the plurality of units shift the replacement times of the rollers with each other, and the monitored section A first monitored portion having a unified color and pattern on the side surface of each roller in the one transport device; and a first color having a unified color and pattern on the side surface of each roller in the second transport device. A second monitored unit different from the one monitored unit.

  According to the transfer device of (6) above, the units of the transfer device that should be focused on the inspection near the replacement time are determined at a glance, which contributes to the improvement of inspection / inspection work efficiency.

  According to the present invention, it is easy to identify a roller in which a functional problem has occurred in the roller or its bearing or the like during operation of the transport device. For this reason, from a different perspective than the previous replacement record, it is easy to separate the rollers that can still be used normally and the rollers that should be replaced, and provide a transport device that can be rationally maintained and managed. Can do.

It is the schematic of the coal thermal power plant provided with the belt conveyor apparatus which can apply the structure of this invention. It is a general-view figure which shows the principal part of the conveying apparatus which concerns on one Embodiment of this invention. It is a 1st general-view figure which shows the change pattern of the to-be-monitored part of the rotating roller side surface in the said FIG. 2 in operation of the belt conveyor apparatus. It is a 1st general-view figure which shows the change pattern of the to-be-monitored part of the rotating roller side surface in the said FIG. 2 in operation of the belt conveyor apparatus. It is a general-view figure which shows the 1st modification of the to-be-monitored part attached | subjected to the side surface of the roller of the belt conveyor apparatus shown in FIG. It is a general-view figure which shows the 2nd modification of the to-be-monitored part attached | subjected to the side surface of the roller 203 of the belt conveyor apparatus shown in FIG. It is an enlarged view of the monitored part shown in FIG.

  FIG. 1 is a schematic view of a coal-fired power plant equipped with a belt conveyor device to which the configuration of the present invention can be applied. The coal unloaded from the coal carrier with a coal lift is sent to the coal storage 102 by the belt conveyor device 101 and piled up (coal storage). At the time of consumption, such coal is transferred from the coal storage 102 to the bunker 104 by the belt conveyor device 103, converted to pulverized coal by the pulverized coal machine 105, and sent to the boiler 106. The steam generated in the boiler 106 is sent to a steam turbine that rotates a generator. Further, the flue gas is discharged from the chimney 110 through the denitration device 107, the electrostatic precipitator 108 and the desulfurization device 109. The boiler 106 is normally continuously operated in terms of power supply and fuel efficiency, and the belt conveyor device 103 is always in operation.

  FIG. 2 is a schematic view showing a main part of the transport apparatus according to the embodiment of the present invention, and shows a part of the belt conveyor apparatus 103 of FIG. The belt conveyor device 103 includes a roller driving unit 200, a driving roller 201, a conveyance belt 202, and a plurality of intermediate driven rollers 203 provided along the moving direction of the conveyance belt 202. Here, arbitrary three rollers 203 are shown.

  The roller driving unit 200 transmits power to a driving roller 201 such as a pulley and rotates the driving roller 201 so that the conveying belt 202 can move in a predetermined direction. Each of the rollers 203 is rotatably fixed by a bearing support portion 204. As described above, a plurality of rollers 203 are provided to support the conveyance belt 202, and each of them is rotated as the conveyance belt 202 moves in the conveyance direction.

  A characteristic configuration of the present invention resides in the monitored portion MP attached to the side surface of the plurality of rollers 203. The monitored part MP has a color and a pattern whose appearance changes according to a change in the number of rotations of the roller. The monitored portion MP is preferably attached to one unit in the belt conveyor device 103, for example, a plurality of intermediate rollers 203 supporting the conveying belt 202 operated by the driving roller 201, all with the same color and pattern. This is because it is convenient for the operator to monitor and compare a plurality of rollers 203 that should be rotated in the same range of rotation. As a result, it is possible to identify a roller that rotates clearly different from most normally rotating rollers through comparison of change patterns exhibited by the monitored portion MP.

  As the color and pattern of the monitored portion MP, for example, two black fan-shaped patterns 60 provided in diagonal areas of a quarter circle are arranged on a white background 50. The monitored unit MP may be any color or pattern that changes its appearance according to the change in the rotation speed of the roller. The color is not limited to the background / pattern = white / black as in this example. Is not limited to the sector shown in this example. However, in consideration of attaching to an existing roller, an installation method with a simpler design, easy to distinguish a change in rotation, and easy to distribute is desirable.

  The monitored unit MP, for example, creates a spray application template (or mask) (not shown), applies the template to the side surface of each roller 203 and applies the spray application, and uniformly forms a pattern according to the template pattern. It is good to form.

  More specifically, a base 50 such as white or bright fluorescent color is applied to the side surface of each roller 203. It is convenient to use a special template for the base coating. As the paint, water-based paint, resin-based paint, fluorescent paint, nocturnal paint, and the like are used. Next, the pattern 60 drawn on the base 50 is in the form of two black (or dark) fans here. As the paint, a paint that can be easily fixed on the base is a water-based paint, a resin-based paint, a fluorescent paint, a night light. It is selected from among paints.

  In addition, the monitored part MP may be configured to form the pattern 60 by applying a previously prepared application member to a predetermined location after applying the base 50. When using such an affixing member, an adhesive or an adhesive that allows the base 50 and the affixing member to adhere easily is required on the affixing surface. Or you may prepare the sticking member which made the foundation | substrate 50 and the pattern 60 the comprehensive design. In this case, an adhesive material or an adhesive that reliably adheres the roller side surface to the application member is required for the application surface.

  FIG. 3 is a first overview diagram showing a change pattern of the monitored portion on the side surface of the rotating roller in FIG. 2 during operation of the belt conveyor device 103. FIG. 4 is a second overview diagram showing a change pattern of the monitored portion on the side surface of the rotating roller in FIG. 2 during operation of the belt conveyor device 103.

  Each of a plurality of rollers 203 to be monitored and compared that should be rotated in the same range of rotation speed is provided with a monitored portion MP having the same color and pattern. Accordingly, during the operation of the belt conveyor device 103, if there is no rotation abnormality such as a rotation failure or abnormal vibration with respect to the plurality of rollers 203, all the monitored parts MP of the plurality of rollers 203 exhibit the same change pattern Rn. (See FIG. 3).

  However, when an arbitrary roller (or its bearing) among the plurality of rollers 203 deteriorates or is damaged, the rotational speed drops by the arbitrary roller, and the monitored unit MP is another normally rotating roller. A different change pattern is exhibited. The arbitrary number of rollers 203a shown in FIG. 4 is clearly lower than that of the other rollers 203, and the monitored portion MP has a change pattern Ra different from that of other normally rotating rollers. Present.

  When the inspection / inspection is performed by the operator, the operator compares the change patterns exhibited by the monitored parts MP with respect to the plurality of operating rollers 203 in the belt conveyor device 103 to be inspected, and is clearly different. Check for change patterns.

  Referring to FIG. 4, with respect to the change pattern Rn of the monitored portion MP of the roller 203 rotating while maintaining the standard rotational speed range, the rotational speed decreases and falls below the standard rotational speed range. The change pattern Ra of the monitored portion MP of the rotating roller 203a can be visually recognized. It is considered that the heat generation amount is increased in the roller 203a in which the number of rotations is decreased as compared with the roller 203 that maintains the rotation in the other normal range.

  As described above, the abnormally rotating roller 203a whose rotational speed decreases and rotates below the standard rotational speed range is rotated while being dragged by the transport belt 202 moving based on the normal transport speed. Therefore, the amount of heat generation increases due to friction with the conveyor belt 202 and friction in the deteriorated or damaged bearing. Here, the conveyor belt 202 is a conveyor belt that conveys combustible materials (coal), and abnormal heating of the conveyor belt causes a belt conveyor fire.

  Therefore, during the operation of the belt conveyor device 103, the plurality of rollers 203 are rotated at a standard rotational speed corresponding to the conveying operation of the conveying belt 202 based on the rotation of the driving roller 201, and the standard rotation is performed. Based on the number, it is determined that the roller rotating with the first change pattern (here, Rn) on the monitored portion MP is rotating. On the other hand, based on a non-standard rotational speed of several tens of percent from the standard rotational speed, more specifically, 20% or less than the standard rotational speed, A roller (in this case, 203a) rotating with a change pattern (in this case, Ra) is determined to be not normal and is identified as a replacement target.

  According to the belt conveyor device 103 configured as described above, the change patterns exhibited by the monitored units are compared for the plurality of rollers 203 in operation, and the roller 203a rotating at a non-standard rotation speed is specified. The identified roller 203a is determined not to function normally and is subject to replacement. The roller 203a identified as the replacement target is replaced with a normally rotatable roller (new or equivalent) by taking appropriate measures such as assigning a spare roller during operation of the belt conveyor apparatus. A monitored part MP similar to the plurality of rollers 203 is attached to the side of the roller to be replaced.

  According to the configuration of the above-described embodiment, vibrations and heat generation abnormalities of each operating roller 203 can be easily achieved by simply adding each monitored unit MP having an inexpensive configuration to the existing belt conveyor device 103. It is possible to detect. That is, it becomes easy to visually identify a roller in which a functional problem has occurred in the roller or its bearing during operation of the transport device. For this reason, the operator can easily handle the rollers that can still be used normally and the rollers to be replaced separately from a viewpoint different from the previous replacement record, and can perform rational maintenance and management. A transport device may be provided.

  In addition, although the structure applied to the belt conveyor apparatus 103 as a conveying apparatus is shown in the structure of this embodiment, the structure which concerns on this invention is not limited to this, The belt conveyor apparatus 101 etc. which are shown in FIG. The present invention can be applied to a belt conveyor apparatus for various uses used in the office. Further, it is also useful to apply to a conveying device such as a belt conveyor device for conveying a combustible material used in a place other than a thermal power plant.

  FIG. 5 is a schematic view showing a first modification of the monitored portion attached to the side surface of the roller 203 of the belt conveyor apparatus shown in FIG. In the monitored part MPi, for example, two black thick parallel line patterns 61 and 62 are attached to a white fan-shaped base 51 that covers a semicircle on the roller side surface. Of course, the color may be a combination of colors other than white / black (light / dark).

  The monitored part MPi may apply the base 51 and the patterns 61 and 62 with an appropriate paint as in the monitored part MP. Alternatively, the base 51 may be applied with an appropriate paint and the patterns 61 and 62 may be pasted. You may affix on the foundation | substrate 51 as a member. Moreover, you may prepare the affixing member which made the foundation | substrate 51 and the patterns 61 and 62 the comprehensive design. In the case of an adhesive member, it is important to use an adhesive or an adhesive that can reliably adhere to the paint surface or the roller side surface.

  When the belt conveyor apparatus 103 as shown in FIG. 1 and FIG. 2 is provided with a plurality of units as a conveying apparatus, the replacement timing of the rollers held in the first conveying apparatus and the second conveying apparatus among the plural units is shifted mutually. I'm allowed. The monitored units in both the conveying apparatuses differ only in color or pattern, or in color and pattern. That is, the monitored portion is unified on the first monitored portion having the color and pattern unified on the side surface of each roller in the first transport device and on the side surface of each roller in the second transport device. And a second monitored unit different from the first monitored unit having different colors and patterns. More specifically, the following is recommended.

  For example, as a first example, the basic pattern is the pattern of the monitored unit MP shown in FIG. 2, and a set of monitored units with different colors is prepared. One of the monitored parts to be prepared is used as a monitored part having a unified color and pattern attached to the side surface of each roller 203 in the first transport apparatus, and the other is each of the two in the second transport apparatus. It is used as a monitored part having a unified color and pattern attached to the side surface of the roller 203. That is, both monitored parts have different colors and the same pattern.

  For example, as a second example, the basic pattern is the pattern of the monitored unit MPi shown in FIG. 5, and a set of monitored units with different colors is prepared. One of the monitored parts to be prepared is used as a monitored part having a unified color and pattern attached to the side surface of each roller 203 in the first transport apparatus, and the other is each of the two in the second transport apparatus. It is used as a monitored part having a unified color and pattern attached to the side surface of the roller 203. That is, both monitored parts have different colors and the same pattern.

  For example, as a third example, as shown in FIG. 2 and FIG. 5, the base color is set as background / pattern = white / black, and a set of monitored parts having different patterns is prepared (MP and MPi). . One of the monitored parts to be prepared is used as a monitored part having a unified color and pattern attached to the side surface of each roller 203 in the first transport apparatus, and the other is each of the two in the second transport apparatus. It is used as a monitored part having a unified color and pattern attached to the side surface of the roller 203. That is, both monitored parts have different patterns (MP and MPi) and have the same color.

  In the fourth example, a set of monitored parts having different colors and patterns is prepared, and one is a unified color and pattern attached to the side surface of each roller 203 in the first transport device. The other is used as a monitored part, and the other is used as a monitored part having a unified color and pattern attached to the side surface of each roller 203 in the second transport device.

  According to the above-described configuration, the unit of the transport apparatus that should be focused on the inspection that is close to the replacement time is determined at a glance, which contributes to an improvement in inspection and inspection work efficiency.

  FIG. 6 is a schematic view showing a second modification of the monitored portion attached to the side surface of the roller 203 of the belt conveyor apparatus shown in FIG. FIG. 7 is an enlarged view of the monitored unit shown in FIG. The monitored part MPj is a circular sticking member having a size that can be stuck to the roller side surface, for example. A dark-colored donut-shaped circle pattern 63 is aligned with a circular light-colored base 52. As shown in FIG. 7, a circular base 52c is arranged so as to be surrounded by a donut-shaped circular pattern 63. Of course, the sticking surface 71 is provided with an adhesive or an adhesive that can be reliably attached to the roller side surface.

  Further, the monitored part MPj may be a temperature sensing sticker in which at least one region of the pattern 63 or the circular base 52c surrounded by the pattern 63 senses temperature and becomes a member that changes color. Such a temperature sensitive seal is preferably used as an auxiliary. For example, the monitored part MPj as a temperature sensing seal is a roller rotating at a standard rotational speed, and even if it is not determined to be abnormal, it is observed that the monitored part MPj is reduced by several percent from the standard rotational speed. Affixed to a roller, or a roller that is observed to be rotating normally before and after the rated bearing life, and used as a reference for measuring the temperature of the roller. It is also possible to investigate the temperature rise of the roller whose rotational speed has actually dropped significantly.

  As described above, according to the configuration of the embodiment of the present invention, the same color and pattern are monitored for each of the plurality of rollers to be monitored and compared that should be rotated at the same number of rotations. The part is attached. The plurality of rollers are observed to be monitored portions exhibiting the same change pattern when there is no rotation abnormality roller during operation of the apparatus. However, when an arbitrary roller (or its bearing) of the plurality of rollers deteriorates or is damaged, the number of rotations decreases by that arbitrary roller, and the change in the monitored portion is different from other normally rotating rollers. Presents a pattern. As described above, by comparing the change patterns exhibited by each monitored portion with respect to a plurality of rollers during operation of the transport device, it is possible to identify the roller in which a functional problem has occurred in the roller or its bearing by visual measurement. It has become. For this reason, from a different perspective than the previous replacement record, it is easy to separate the rollers that can still be used normally and the rollers that should be replaced, and provide a transport device that can be rationally maintained and managed. Can do.

DESCRIPTION OF SYMBOLS 101,103 Belt conveyor apparatus 102 Coal storage place 104 Bunker 105 Pulverized coal machine 106 Boiler 107 Denitration apparatus 108 Electric dust collector 109 Desulfurization apparatus 110 Chimney 200 Roller drive part 201 Drive roller 202 Conveyor belt 203, 203a Roller 204 Bearing support part MP, MPi, MPj Monitored part 50, 51, 52 52c Base 60, 61, 62, 63 Pattern 71 Pasting surface Rn, Ra Change pattern

Claims (5)

A roller drive,
A driving roller to which power from the roller driving unit is transmitted;
A conveying belt that is movable in a predetermined direction by rotating the driving roller by the roller driving unit;
A plurality of rollers the support conveyor belt, that could be rotated at a rotational speed of each similar range with the movement of the conveying direction of the conveyor belt,
A monitored portion having a color and a pattern that changes in appearance according to a change in the number of rotations of the rollers attached to the side surfaces of each of the plurality of rollers;
Equipped with a,
The monitored portion is provided with the same color and pattern on each of the plurality of rollers, and the monitored belt is to be rotated at a rotational speed in a similar range as the conveying belt moves in the conveying direction due to rotation of the driving roller. Each of the plurality of rollers is monitored and compared, and a roller having a reduced number of rotations that exhibits a change pattern of a monitored portion that is different from a normally rotating roller among the plurality of rollers can be identified by visual inspection. it is not that transport device. The transport device according to claim 1, wherein the monitored unit is made of at least one of a water-based paint, a resin-based paint, and a fluorescent paint.   The transport apparatus according to claim 1, wherein the monitored portion includes a pasting member. During the operation of rotating the plurality of rollers, each of the plurality of rollers to be rotated at a rotation speed in the same range as each of the plurality of rollers to be rotated in a similar range is accompanied by the movement of the transport belt in the transport direction by the rotation of the driving roller. There compared to you are rotating exhibits a first change pattern, the monitored portion is decreasing in speed in the roller which is rotating exhibits a second change pattern, the heating value is increased The conveying device according to claim 1, which is regarded as being. The conveyor belt is a conveyor belt that conveys combustible materials ,
The conveying device according to claim 4 , wherein the roller that rotates while presenting the second change pattern in the monitored portion is specified as an exchange target.

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