JP2018173341A - Temperature measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature measurement device in which an optical fiber can be set without changing the distance to a conveyor and the temperature of the conveyor can be measured desirably.SOLUTION: There is provided a temperature measurement device for measuring the temperature of a conveyor for coal, the temperature measurement device including: a cable unit 60 located along a conveyor; and a measurement unit for measuring the temperature of the conveyor. The cable unit 60 includes: an optical fiber 62; a messenger wire 61 hung along the conveyor; and a rushing rod 63 for fixing the optical fiber 62 to the messenger wire 61.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a temperature measuring device.

  Conventionally, in coal-fired power generation facilities, coal as fuel is carried into a silo using a carry-in conveyor and carried out to a bunker using a carry-out conveyor. In a carry-in conveyor and a carry-out conveyor (hereinafter collectively referred to as a conveyor), a temperature increase may occur due to an oxidation reaction of coal, an increase in frictional heat of a roller, or the like. It is very important to prevent accidents by measuring the temperature of the conveyor and monitoring such temperature rise.

  As a device for measuring the temperature of a conveyor, a temperature measuring device using Raman scattered light of an optical fiber has been proposed (for example, see Patent Document 1).

JP-A-8-268533

  According to the temperature measuring device disclosed in Patent Document 1, an optical fiber is installed along a conveyor. Then, the intensity ratio of anti-Stokes light and Stokes light returning to the light source as a backscattering hole for Raman scattered light of the optical fiber is measured. Further, the delay time of the back scattering hole returning to the incident side is measured. Thereby, the position of a conveyor and the temperature of the position are measured.

  By the way, in the temperature measuring device disclosed in Patent Document 1, an optical fiber in which a core wire is covered with a metal tube is used in order to prevent the optical fiber from being broken due to falling coal or the like. Therefore, it is not easy to bend the optical fiber. As a result, the distance from the conveyor may change at a position where the conveyor is bent. On the other hand, it is useful if an optical fiber can be installed without changing the distance from the conveyor and the temperature of the conveyor can be measured suitably.

  Therefore, an object of the present invention is to provide a temperature measuring device that can install an optical fiber without changing the distance from the conveyor and can suitably measure the temperature of the conveyor.

  The present invention is a temperature measuring device that measures the temperature of a conveyor that conveys coal, and includes a cable portion that is arranged along the conveyor, and a measuring portion that measures the temperature of the conveyor, and the cable portion Relates to a temperature measuring device comprising an optical fiber, a messenger wire suspended along the conveyor, and a lashing rod for fixing the optical fiber to the messenger wire.

  Moreover, it is preferable that the said cable part is arrange | positioned at the both sides of the roller of the said conveyor.

  Moreover, it is preferable that the said cable part is arrange | positioned in the vicinity of the installation surface in which the said conveyor is installed.

  Moreover, it is preferable that a temperature measurement apparatus is further provided with the cover arrange | positioned along the said conveyor and seals the said conveyor, and the said cover is provided with the inspection window arbitrarily arrange | positioned along the said conveyor.

  ADVANTAGE OF THE INVENTION According to this invention, an optical fiber can be installed without changing the distance with a conveyor, and the temperature measuring apparatus which can measure the temperature of a conveyor suitably can be provided.

It is the schematic which shows the coal-fired power generation installation in which the temperature measuring apparatus which concerns on one Embodiment of this invention was installed. It is a schematic plan view which shows arrangement | positioning of the conveyor in which the temperature measuring apparatus of one Embodiment was installed. It is sectional drawing of the conveyor which shows the positional relationship of the optical fiber of the temperature measuring apparatus of one Embodiment, and a conveyor. It is a side view of the conveyor which shows the installation condition of the optical fiber of the temperature measurement apparatus of one Embodiment. It is a side view which shows the cover of the temperature measuring device of one Embodiment.

Hereinafter, a temperature measuring apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS.
First, with reference to FIG.1 and FIG.2, the flow from carrying in of coal in a coal thermal power generation equipment to carrying out to a boiler is demonstrated.

  Coal landed by a coal lift from a coal carrier (not shown) is sent to a silo (coal storage) 20 by a carry-on conveyor 10 and piled up (coal storage). At the time of consumption, such coal M is transferred from the silo 20 to the bunker 40 by the carry-out conveyor 30, converted to pulverized coal by the pulverized coal machine 50, and sent to the boiler.

Next, the configuration of the carry-out conveyor 30 will be described with reference to FIG. The configuration of the carry-in conveyor 10 is the same as the configuration of the carry-out conveyor 30. In the following description, when the carry-in conveyor 10 and the carry-out conveyor 30 are not distinguished, they are described as “conveyor 100”.
The conveyor 100 includes a belt body 38, a conveyor frame 37, and rollers 39.

The belt body 38 is an endless belt, and is divided into a supply side belt 33 that carries and transports coal M, and a return side belt 31 that returns and returns.
The supply-side belt 33 is arranged on the upper part of the conveyor 100 and can carry the coal M on the upper surface and transport it to the silo 20 or the bunker 40.
The return side belt 31 is disposed in the lower part of the conveyor 100 and moves in the direction opposite to the moving direction of the supply side belt 33.

  The conveyor frame 37 is disposed between the return side belt 31 and the supply side belt 33. The conveyor frame 37 supports the return side belt 31 and the supply side belt 33.

  The roller 39 supports the belt body 38. The roller 39 includes a return roller 32 and a supply roller 34.

  The return roller 32 is a roller body whose axial direction is arranged along the width direction of the conveyor 100. The return roller 32 is rotatably supported at the lower part of the conveyor frame 37. The return roller 32 contacts the lower surface of the return side belt 31 and supports the return side belt 31.

  The supply roller 34 is a roller body whose axial direction is arranged along the width direction of the conveyor 100. The supply roller 34 is divided into three along the width direction of the conveyor 100 and is rotatably supported on the upper part of the conveyor frame 37. The supply roller 34 at the center in the width direction is arranged with the axial direction facing the horizontal direction. Each of the supply rollers 34 at both ends in the width direction is disposed so as to be inclined in the axial direction toward the supply roller 34 at the center in the width direction. The supply roller 34 is disposed in contact with the lower surface of the supply side belt 33.

  According to the conveyor 100 described above, the supply side belt 33 can transport the coal M on the upper surface, and the return side belt 31 moves in the direction opposite to the movement direction of the supply side belt 33. The supply roller 34 supports the movement of the supply side belt 33 by contacting the lower surface and rotating. The return roller 32 supports the movement of the return side belt 31 by contacting the lower surface and rotating.

Next, the temperature measuring apparatus 1 according to the present embodiment will be described.
The temperature measuring device 1 according to this embodiment is a device that measures the temperatures of the carry-in conveyor 10 and the carry-out conveyor 30. As shown in FIGS. 1 to 3, the temperature measurement device 1 includes a cable part 60, a measurement part 70, and a cover 35.

  The cable part 60 is disposed along the conveyor 100. Specifically, the cable portion 60 is disposed along the carry-in conveyor 10 and the carry-out conveyor 30. The cable portions 60 are arranged in a pair in the width direction of the conveyor 100. Specifically, the cable part 60 is arrange | positioned at the both sides of the roller 39 of the conveyor 100, as shown in FIG. Specifically, the cable portion 60 is disposed on each side of the return roller 32. Moreover, the cable part 60 is arrange | positioned in the vicinity of the installation surface G in which the conveyor 100 is installed. Further, the cable unit 60 includes a communication cable unit 80 that connects the cable unit 60 on the carry-in conveyor 10 side and the cable unit 60 on the carry-out conveyor 30 side. As shown in FIGS. 3 and 4, the cable unit 60 includes an optical fiber 62, a messenger wire 61, and a lashing rod 63.

  The optical fiber 62 has a core (not shown) made of quartz glass or plastic, and propagates incident light from a semiconductor laser (not shown). Further, the optical fiber 62 propagates Raman scattered light, thereby propagating anti-Stokes light whose intensity is highly sensitive to temperature and Stokes light whose intensity is less sensitive to temperature. The optical fiber 62 is disposed over the entire carry-in conveyor 10, carry-out conveyor 30, and communication cable unit 80.

  The messenger wire 61 is a so-called hanging line. The messenger wire 61 is made of, for example, galvanized steel. The messenger wire 61 is disposed along the optical fiber 62. That is, the messenger wire 61 is arranged over the entire of the carry-in conveyor 10, the carry-out conveyor 30, and the communication cable unit 80, similarly to the optical fiber 62.

  The lashing rod 63 is a member that fixes the optical fiber 62 to the messenger wire 61. The lashing rod 63 is a winding formed in a so-called spiral shape. The lashing rod 63 is formed using, for example, galvanized steel. The lashing rod 63 bundles the optical fiber 62 and the messenger wire 61 and then is wound around the outer periphery of the lashing rod 63 to fix the optical fiber 62 and the messenger wire 61.

  The measuring unit 70 is a device that analyzes so-called Raman scattered light and measures the temperature of each part of the conveyor 100. Specifically, the cable unit 60 is connected to the measurement unit 70, and the temperature of each part of the conveyor 100 is measured by analyzing Raman scattered light provided from the optical fiber 62. As a specific configuration and analysis method of the measurement unit 70, for example, temperature measurement can be performed using a well-known configuration and method described in JP-A-8-268533 and JP-A-2004-99264. The measuring unit 70 transmits the measured temperature information and the measured position information to a computer in a control room (not shown). A control room (not shown) centrally manages the conveyor 30 by monitoring temperature information and position information transmitted from the computer.

  The cover 35 is a cover body that is disposed along the conveyor 100 and seals the conveyor 100. The cover 35 is arrange | positioned at the inclination part of the conveyor 100 in which the coal M may fall, a connection part, etc., for example. As shown in FIG. 5, the conveyor 100 has an inspection window 36 that is arbitrarily arranged along the conveyor 100.

  The inspection window 36 is provided at an arbitrary location along the conveyor 100. The inspection window 36 is provided to inspect the state of the conveyor 100 in the cover 35 by opening from the outside.

Next, a flow when the optical fiber 62 is arranged along the conveyor 100 will be described.
First, messenger wires 61 are suspended from both ends of the carry-in conveyor 10 over the entire length of the carry-in conveyor 10. Further, messenger wires 61 are suspended from both ends of the carry-out conveyor 30 over the entire length of the carry-out conveyor 30. For example, the messenger wire 61 is supported by the conveyor 100 at both ends in the transport direction of the carry-in conveyor 10 and at any part of the carry-in conveyor 10. Further, the messenger wire 61 is supported by the conveyor 100 at both ends in the transport direction of the carry-out conveyor 30 and at any place in the middle of the carry-out conveyor 30. The messenger wire 61 is also provided at a position where the communication cable portion 80 is disposed.

  Next, the optical fiber 62 is disposed along the messenger wire 61. That is, the optical fiber 62 is disposed over the entire length of the carry-in conveyor 10 and is disposed over the entire length of the carry-out conveyor 30. Further, it is also arranged at the position of the communication cable portion 80.

  The lashing rod 63 bundles the optical fiber 62 and the messenger wire 61 and is wound around both. As a result, the lashing rod 63 can fix the optical fiber 62 to the messenger wire 61 so that no tension is applied to the optical fiber 62. When the messenger wire 61 is bent along the conveyor 100, the lashing rod 63 fixes the optical fiber 62 to the messenger wire 61 by bending the optical fiber 62 along the curvature of the messenger wire 61.

Next, the operation of the temperature measuring device 1 will be described.
By arranging the cable part 60 on both sides of the return roller 32, the optical fiber 62 propagates Raman scattered light corresponding to the temperature around the return roller 32 to the measurement part 70. For example, when the friction during rotation of the return roller 32 increases due to the coal M adhering to the return side belt 31, the temperature of the return roller 32 increases. The optical fiber 62 propagates Raman scattered light corresponding to the increased temperature to the measurement unit 70. Moreover, as shown in FIG. 3, when the coal M which fell from the supply side belt 33 to the installation surface G of the conveyor 100 is oxidized, the coal M generates heat. The optical fiber 62 propagates Raman scattered light corresponding to the temperature increased by the heat generation of the coal M to the measuring unit 70. The measurement unit 70 analyzes the Raman scattered light to identify the temperature rise of the conveyor 100 and the position of the conveyor 100 that has risen in temperature.
In addition, an operator can detect the temperature rise in the conveyor 100 by measuring the temperature inside the conveyor 100 from the inspection window 36 as appropriate.

The temperature measuring device 1 according to the embodiment described above has the following effects.
(1) The temperature measuring device 1 includes a cable unit 60 disposed along the conveyor 100 and a measuring unit 70 that measures the temperature of the conveyor 100. A messenger wire 61 suspended along the conveyor 100 and a lashing rod 63 for fixing the optical fiber 62 to the messenger wire 61 are included. Thereby, compared with the case where the optical fiber 62 coat | covered with the metal pipe is used, the optical fiber 62 can be arrange | positioned easily. Further, by arranging the optical fiber 62 along the suspended messenger wire 61, it is possible to prevent the optical fiber 62 from being damaged by touching the coal M to which the optical fiber 62 has fallen. Since the optical fiber 62 can be easily bent along the conveyor 100, the temperature of the conveyor 100 can be suitably measured without greatly changing the distance between the conveyor 100 and the optical fiber 62.

(2) The cable portions 60 are arranged on both sides of the rollers 39 of the conveyor 100. Thereby, the optical fiber 62 can send a signal based on the temperature of the roller 39 to the measuring device. Therefore, the temperature of the roller 39 can be measured based on the signal sent from the optical fiber 62.

(3) The cable part 60 is disposed in the vicinity of the installation surface G on which the conveyor 100 is installed. Thereby, the optical fiber 62 can send the signal based on the temperature rise when the coal M falls on the installation surface G to the measuring device. Therefore, it is possible to measure not only the temperature of the roller 39 but also the temperature rise caused by the dropped coal M.

(4) The temperature measuring device 1 includes a cover 35 that is arranged along the conveyor 100 and seals the conveyor 100, and the cover 35 includes an inspection window 36 that is arbitrarily arranged along the conveyor 100. Configured. Thereby, dual monitoring of temperature monitoring using the optical fiber 62 and temperature monitoring by an operator using the inspection window 36 can be realized. Therefore, the safety of the conveyor 100 that conveys the coal M can be further improved.

  The preferred embodiments of the temperature measuring device 1 of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed.

  For example, in the above-described embodiment, the optical fiber 62 is disposed along the messenger wire 61, but the optical fiber 62 is not limited to be disposed linearly along the messenger wire 61. For example, the optical fiber 62 may be disposed in a spiral shape so as to be wound around the messenger wire 61. Thereby, even if the curvature of the messenger wire 61 is larger, the entire optical fiber 62 is easily bent, so that it can be disposed along the messenger wire 61.

  Further, the optical fiber 62 may be arranged linearly at a position along the conveyor 100 arranged linearly, and may be arranged spirally at a curve position. Thereby, the total length of the messenger wire 61 can be shortened while making the optical fiber 62 easy to bend in a place where the curvature of the messenger wire 61 is large.

DESCRIPTION OF SYMBOLS 1 Temperature measuring device 35 Cover 36 Inspection window 60 Cable part 61 Messenger wire 62 Optical fiber 63 Lashing rod 70 Measuring part 100 Conveyor G Installation surface M Coal

Claims (4)

A temperature measuring device that measures the temperature of a conveyor that conveys coal,
A cable portion disposed along the conveyor;
A measuring unit for measuring the temperature of the conveyor;
With
The cable portion is
Optical fiber,
A messenger wire suspended along the conveyor;
A lashing rod for fixing the optical fiber to the messenger wire;
A temperature measuring device comprising:   The temperature measuring device according to claim 1, wherein the cable portion is disposed on both sides of a roller of the conveyor.   The temperature measuring device according to claim 2, wherein the cable portion is disposed in the vicinity of an installation surface on which the conveyor is installed. A cover disposed along the conveyor and sealing the conveyor;
The said cover is a temperature measuring apparatus in any one of Claims 1-3 provided with the inspection window arbitrarily arrange | positioned along the said conveyor.

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