JP2022000398A - Monitoring device of conveyor roller - Google Patents

Abstract

To provide a monitoring device of a conveyor roller capable of continuously and constantly grasping a state of a conveyor roller and further improving safety.SOLUTION: In a conveyor roller 31 including: a fixed shaft 32 supported by a support member 12; a bearing 34 mounted on the fixed shaft 32; and a roller body 39 arranged so as to surround the fixed shaft 32 and rotatably supported by the fixed shaft 32 through the bearing 34, a monitoring device comprises: a data detection and transmission unit 60 for detecting a state of the fixed shaft 32 and continuously wirelessly transmitting the state as data; and a data receiving unit 70 for receiving the data transmitted from the data detection and transmission unit 60.SELECTED DRAWING: Figure 4

Description

The present invention relates to a conveyor roller monitoring device.

Conventionally, in thermal power plants, belt conveyors in which endless belts are mounted on a large number of conveyor rollers are often used as equipment for transporting coal as fuel. The conveyor roller generally has a configuration in which a cylindrical roller body is arranged around a fixed shaft via a bearing. When a flammable substance such as coal is conveyed by a belt conveyor, a technique for detecting the temperature of the conveyor roller is known in order to prevent a fire or the like from occurring due to heat generation of the conveyor roller. For example, in Patent Document 1, the bearing of the conveyor roller is provided with an IC tag and a temperature sensor, and the temperature of the bearing can be obtained when the receiver for the IC tag is brought close to the bearing, and the temperature measurement result is transmitted from the receiver to the management host machine. The technology to transmit is disclosed.

Japanese Unexamined Patent Publication No. 2005-030588

The conveyor roller temperature detection technology disclosed in Patent Document 1 obtains the temperature of a bearing by bringing a receiver for an IC tag close to the bearing, so that the temperatures of a large number of conveyor rollers can be continuously and collectively measured. It is difficult to grasp. Therefore, there is room for improvement in terms of further improving safety by constantly grasping the state of a large number of conveyor rollers.

The present invention has been made in view of the above, and an object of the present invention is to provide a conveyor roller monitoring device capable of continuously and constantly grasping the state of a conveyor roller and further improving safety. ..

The monitoring device for the conveyor roller of the present invention is arranged so as to surround the fixed shaft supported by the support member, the bearing mounted on the fixed shaft, and the fixed shaft, and rotates on the fixed shaft via the bearing. In a conveyor roller including a roller body that can be supported, a data detection transmission unit that detects the state of the fixed shaft and continuously wirelessly transmits the state as data, and a data detection transmission unit that transmits the data continuously. A data receiving unit for receiving data is provided.

The data detection transmitting unit detects the state of the fixed shaft inside the roller body.

Further, a power generation unit that generates power by the rotation of the roller body and an electricity supply unit that supplies the electricity generated by the power generation unit to the data detection transmission unit are further provided.

The state of the fixed shaft is the temperature of the fixed shaft.

The state of the fixed shaft is vibration of the fixed shaft.

According to the present invention, it is possible to provide a conveyor roller monitoring device capable of continuously and constantly grasping the state of the conveyor roller and further improving safety.

It is a figure which shows typically the belt conveyor device which includes the conveyor roller which concerns on one Embodiment of this invention, and is the side sectional view of the part corresponding to the arrow | view of FIG. It is a vertical sectional view of the part corresponding to the arrow view of II-II of FIG. It is a vertical sectional view which shows the conveyor roller which comprises the monitoring apparatus which concerns on one Embodiment of this invention. It is a figure which shows the outline of the monitoring apparatus which concerns on one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a vertical cross-sectional view showing an intermediate portion in a transport direction of a belt conveyor device 1 including a conveyor roller monitoring device according to an embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. The belt conveyor device 1 is installed for transporting coal C, for example, in a thermal power plant.

First, the outline of the belt conveyor device 1 will be described. As shown in FIGS. 1 and 2, the belt conveyor device 1 includes a base 10, an endless belt 20, a plurality of transport-side conveyor rollers 30, and a plurality of return-side conveyor rollers 40. Note that FIGS. 1 and 2 show an XYZ Cartesian coordinate system. The X direction corresponds to the left-right direction in FIG. 1, and the Y direction indicates the horizontal direction in which the belt 20 extends as shown in FIG. Further, the Z direction is the vertical direction.

As shown in FIG. 1, the base 10 is bridged and fixed to the upper end portion of the leg portion 11 which is separated in the X direction, which is the left-right direction in FIG. 1. The base 10 is provided with a plurality of support members 12 extending upward. The support member 12 includes a pair of left and right inner frames 13 and a pair of left and right outer frames 14. Each of the plurality of support members 12 is provided corresponding to each conveyor roller 30 on the transport side. Further, the base 10 is provided with a pair of left and right lower frames 15 extending downward corresponding to each return side conveyor roller 40.

As shown in FIG. 2, the belt 20 is wound around an upstream end roller 21 and a downstream end roller (not shown). At least one of the upstream end roller 21 and the downstream end roller is a drive roller, and the rotation of the drive roller causes the belt 20 to move in the directions indicated by the arrows F and R. The upper side of the belt 20 is the transport side belt 20a that moves in the F direction, and the lower side is the return side belt 20b that moves in the R direction. The base 10 is horizontally arranged between the transport side belt 20a and the return side belt 20b. The base 10 extends in the Y direction along the belt 20. The coal C is placed on the transport side belt 20a and transported.

As shown in FIG. 2, each of the plurality of transport-side conveyor rollers 30 and the plurality of return-side conveyor rollers 40 are arranged at intervals in the Y direction. Each of the plurality of transport-side conveyor rollers 30 comes into contact with the lower surface of the transport-side belt 20a and rotates drivenly to support the transport-side belt 20a. Each of the plurality of return-side conveyor rollers 40 comes into contact with the lower surface of the return-side belt 20b and is driven to rotate to support the return-side belt 20b.

As shown in FIG. 1, the conveyor roller 30 on the transport side includes three conveyor rollers 31 divided in the left-right direction. In the following, the central conveyor roller 31 may be referred to as a conveyor roller 31a, the left conveyor roller 31 may be referred to as a conveyor roller 31b, and the right conveyor roller 31 may be referred to as a conveyor roller 31c. The central conveyor roller 31a is arranged in the axial direction parallel to the upper surface of the base 10. Each of the conveyor rollers 31b and 31c on both sides of the conveyor roller 31a is inclined at the same angle so that the axial direction extends diagonally upward from the conveyor roller 31a.

In FIG. 1, the central conveyor roller 31a is rotatably supported at both ends by a pair of left and right inner frames 13. In FIG. 1, the conveyor roller 31b on the left side is rotatably supported at both ends by the inner frame 13 and the outer frame 14 on the left side. In FIG. 1, the conveyor roller 31c on the right side is rotatably supported at both ends by the inner frame 13 and the outer frame 14 on the right side.

The conveyor roller 30 on the transport side, which includes the three conveyor rollers 31, is assembled so as to be concave as a whole when viewed from the front. As shown in FIG. 1, the transport-side belt 20a in the belt 20 follows the shape of the transport-side conveyor roller 30 and is deformed in a concave shape in the front view. As a result, falling or the like is suppressed when the coal C is transported.

As shown in FIG. 1, the return roller 40 is rotatably supported by a pair of left and right lower frames 15 at both ends via a shaft 42. The axial direction of the return roller 40 is substantially parallel to the upper surface of the base 10. The return-side roller 40 is composed of one roller 40 without being divided. Therefore, the return belt 20b whose lower surface is supported by the return conveyor roller 40 is supported so as to be flat.

As shown in FIG. 3, the conveyor roller 31 includes a fixed shaft 32, bearings 34 mounted at both ends of the fixed shaft 32, and a cylindrical roller body 39.

The fixed shaft 32 penetrates the axis of the roller body 39. The bearing 34 has a case 35 and a bearing body 36. The bearing body 36 is fitted in a recess 35a formed on the outer side of the center of the case 35.

The case 35 is fitted inside both ends of the roller body 39 and is fixed to the roller body 39 by means such as welding. The bearing body 36 is a rolling bearing having an inner ring 36a on the fixed side, an outer ring 36b on the movable side, and a plurality of balls 36c rotatably fitted between the inner ring 36a and the outer ring 36b. The inner ring 36a is pressure-welded and held on the outer peripheral surface of the fixed shaft 32, and the outer ring 36b is pressure-welded and held on the inner surface of the recess 35a of the case 35. Bent cylindrical seals 37a and 37b are incorporated so as to form a maze on the outside of the bearing body 36 in the recess 35a of the case 35, and a dustproof cover 38 for closing the recess 35a is provided on the outside thereof. ing.

The roller main body 39 is arranged so as to surround the fixed shaft 32 between the cases 35 of each bearing 34. Cases 35 are fixed to both ends of the roller body 39 as described above. The roller body 39 is rotatably supported by a fixed shaft 32 via a bearing 34.

In the conveyor roller 31, one end and the other end of the fixed shaft 32 protruding from the roller body 39 are fixed to the inner frame 13, the inner frame 13, and the outer frame 14, respectively. The belt 20 comes into contact with the outer peripheral surface of the upper region of the roller body 39 to drive the roller body 39 to rotate.

The conveyor roller 31 is provided with the monitoring device 50 according to the present embodiment. The monitoring device 50 of the present embodiment is a monitoring device 50A arranged close to the bearing 34 on the right side in FIG. 3 inside the conveyor roller 31, and a monitoring device 50 arranged close to the bearing 34 on the left side in FIG. Includes 50B and. The left and right monitoring devices 50A and 50B have the same configuration, and in the present embodiment, they have a symmetrical shape as shown in FIG. Hereinafter, the description of the configuration will be continued with the left and right monitoring devices 50A and 50B as the monitoring devices 50.

As shown in FIGS. 3 and 4, the monitoring device 50 includes a data detection transmission unit 60, a data reception unit 70 for receiving data transmitted from the data detection transmission unit 60, a power generation unit 80, and an electricity supply unit 90. And. The monitoring device 50 is preferably provided on each conveyor roller 31 (31a, 31b, 31c) of all the conveyor rollers 30 on the transport side.

The data detection transmitter 60 detects the temperature and vibration state of the fixed shaft 32 inside the conveyor roller 31 surrounded by the bearing 34 on one side (on the right side in FIG. 3) and the roller body 39, and also detects the temperature and vibration. The data of each state is continuously transmitted wirelessly. The vibration state includes the amplitude and frequency of the vibration. In FIG. 4, 60A shows a data signal transmitted from the data detection and transmission unit 60 of the monitoring device 50A, and 60B shows a data signal transmitted from the data detection and transmission unit 60 of the monitoring device 50B.

As shown in FIG. 3, the data detection transmitting unit 60 is detachably fixed above the fixed shaft 32 via a plurality of clamp members 65. The data detection / transmission unit 60 includes a sensor head 61 incorporating a temperature sensor and a vibration sensor, and a transmission antenna 62 for data transmission.

The temperature sensor built in the sensor head 61 detects the temperature of the portion where the tip end portion of the temperature sensor cable 63 contacts the fixed shaft 32. The tip of the temperature sensor cable 63 is an inner portion of the bearing body 36 in the fixed shaft 32, and is arranged so as to be in contact with the surface of the fixed shaft 32 close to the inner ring 36a. The vibration sensor built in the sensor head 61 is equipped with, for example, a 3-axis acceleration sensor or the like, and detects the vibration of the fixed shaft 32 at the mounting position of the sensor head 61. Each of the temperature data detected by the temperature sensor and the vibration data detected by the vibration sensor are continuously transmitted wirelessly from the transmitting antenna 62 as digital data and received by the data receiving unit 70.

The power generation unit 80 is inside the conveyor roller 31 and is arranged between the bearing 34 and the data detection transmission unit 60. The power generation unit 80 is a rotary generator having an annular stator 81 including a coil fixed to the outer peripheral portion of the fixed shaft 32 and an annular rotor 82 including magnets arranged in contact with the outer peripheral surface of the stator 81. be. The rotor 82 is fixed to the inner surface of the case 35 of the bearing 34. The rotor 82 rotates integrally with the case 35 that rotates together with the roller body 39. The power generation unit 80 generates power by rotating the roller main body 39.

The electricity supply unit 90 supplies the electricity generated by the power generation unit 80 to the temperature sensor and the vibration sensor of the data detection transmission unit 60 to operate the temperature sensor and the vibration sensor. The electricity supply unit 90 includes a lead wire 91 connected to the stator 81 and the data detection transmission unit 60. The electricity generated by the power generation unit 80 is supplied to the temperature sensor and vibration sensor of the data detection transmission unit 60 via the lead wire 91.

As shown in FIG. 4, the data receiving unit 70 has, for example, a receiving antenna 71 installed in a monitoring station in a thermal power plant, a data collecting unit 72 installed in the monitoring station, and the like. The data collection unit 72 is composed of a computer or the like. The temperature data and vibration data transmitted from the transmitting antenna 62 of the data detection transmitting unit 60 are received by the receiving antenna 71 and input to the data collecting unit 72. A unique wireless signal is transmitted from the data detection and transmission unit 60 provided on each conveyor roller 31, so that it is possible to identify whether the data signals are from the left and right monitoring devices 50A and 50B, and which conveyor It is possible to identify whether it is a data signal from the roller 31.

In the above-mentioned monitoring post, the data collection unit 72 constantly monitors the temperature and vibration state of the fixed shaft 32. While the belt conveyor device 1 is in operation, the temperature data and the vibration data are continuously and constantly transmitted from the data detection transmission unit 60. By monitoring the data collection unit 72 at the monitoring post, the temperature and vibration states of the fixed shafts 32 in all the conveyor rollers 31 can be constantly grasped in real time. The observer can monitor the presence or absence of abnormality in each conveyor roller 31 from the temperature and vibration state of the fixed shaft 32, and analyze the change in the state to perform predictive management.

The conveyor roller 31 that directly receives the load of the coal C via the transport-side belt 20a tends to generate heat due to friction with the transport-side belt 20a, friction generated by the bearing body 36, and the like. For example, if the coal C comes into contact with the conveyor roller 31 whose temperature has risen excessively or if the coal fine powder emitted from the coal C adheres to the conveyor roller 31, there is a risk of ignition. Further, the excessive vibration of the fixed shaft 32 hinders the smooth rotation of the roller main body 39 and increases the frictional heat. Abnormalities in the conveyor roller 31 such as such excessive temperature rise and vibration can be detected in advance by constantly monitoring the data acquisition unit 72. In addition, care such as parts replacement can be accurately performed before an abnormality occurs.

According to the monitoring device 50 according to the present embodiment described above, the following effects are obtained.
The monitoring device 50 according to the present embodiment is arranged so as to surround the fixed shaft 32 supported by the support member 12, the bearing 34 mounted on the fixed shaft 32, and the fixed shaft 32, and the bearing 34 is attached to the fixed shaft 32. In the conveyor roller 31 provided with the roller body 39 rotatably supported via the data detection and transmission unit 60, the data detection transmission unit 60 that detects the state of the fixed shaft 32 and continuously wirelessly transmits the state as data. A data receiving unit 70 for receiving data transmitted from the transmitting unit 60 is provided. The state of the fixed shaft 32 in the present embodiment means the state of the temperature and vibration of the fixed shaft 32.

As a result, the temperature and vibration state of the conveyor roller 31 can be continuously and constantly grasped, so that the abnormality of the conveyor roller 31 can be detected in real time, and as a result, the safety can be further improved. ..

The data detection / transmission unit 60 according to the present embodiment detects the state of the fixed shaft 32 inside the roller main body 39.

In the conveyor roller 31, the fixed shaft 32 arranged inside the roller body 39 does not easily dissipate heat, so that the temperature tends to be high. Therefore, by detecting the temperature state of the fixed shaft 32 inside the roller main body 39 as in the present embodiment, it is possible to quickly and accurately detect the abnormality of the conveyor roller 31.

The monitoring device 50 according to the present embodiment includes a power generation unit 80 that generates power by the rotation of the roller main body 39, and an electricity supply unit 90 that supplies the electricity generated by the power generation unit 80 to the data detection transmission unit 60.

This eliminates the need for external power supply measures such as equipment that supplies power to the inside of the rotating conveyor roller 31 from the outside and batteries for power supply, which simplifies the configuration and saves maintenance work. It can be reduced.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.

For example, in the above embodiment, the monitoring device 50 is provided on each conveyor roller 31 of the conveyor side conveyor roller 30, but the monitoring device 50 may also be applied to the return side conveyor roller 40. Further, the monitoring device 50 detects the temperature and vibration of the fixed shaft 32 of the conveyor roller 31, but may detect either the temperature or the vibration.

In the above embodiment, the monitoring devices 50A and 50B are provided corresponding to the bearings 34 on both sides, but only one of the monitoring devices 50A and 50B is provided, and the abnormality of the conveyor roller 31 is provided in one of the monitoring devices. May be detected. Further, a function of storing electricity generated by the power generation unit 80 may be added so that monitoring can be continued for a certain period of time even when the operation is stopped.

The monitoring device 50 is preferably provided on all the conveyor rollers 31, but may be provided on one or two of the conveyor rollers 31a, 31b, and 31c of the transport side conveyor roller 30 in some cases. Further, for the plurality of conveyor side conveyor rollers 30 installed along the belt 20, in addition to providing a monitoring device 50 on all the conveyor side conveyor rollers 30, the conveyor roller 30 is selectively provided as necessary. May be provided with a monitoring device 50.

12 Support member 31 Conveyor roller 32 Fixed shaft 34 Bearing 39 Roller body 50 (50A, 50B) Monitoring device 60 Data detection transmitter 70 Data receiver 80 Power generator 90 Electricity supply

Claims (5)

A fixed shaft supported by a support member and
The bearing mounted on the fixed shaft and
In a conveyor roller comprising a roller body arranged so as to surround the fixed shaft and rotatably supported on the fixed shaft via the bearing.
A data detection transmitter that detects the state of the fixed axis and continuously wirelessly transmits the state as data.
A conveyor roller monitoring device including a data receiving unit that receives data transmitted from the data detection transmitting unit. The conveyor roller monitoring device according to claim 1, wherein the data detection transmission unit detects the state of the fixed shaft inside the roller body. The monitoring device for a conveyor roller according to claim 1 or 2, further comprising a power generation unit that generates electricity by rotating the roller body and an electricity supply unit that supplies electricity generated by the power generation unit to the data detection transmission unit. .. The conveyor roller monitoring device according to any one of claims 1 to 3, wherein the state of the fixed shaft is the temperature of the fixed shaft. The conveyor roller monitoring device according to any one of claims 1 to 3, wherein the state of the fixed shaft is vibration of the fixed shaft.

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