JP2005164471A - Temperature measuring method and device of conveyor belt - Google Patents

Temperature measuring method and device of conveyor belt Download PDF

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JP2005164471A
JP2005164471A JP2003405729A JP2003405729A JP2005164471A JP 2005164471 A JP2005164471 A JP 2005164471A JP 2003405729 A JP2003405729 A JP 2003405729A JP 2003405729 A JP2003405729 A JP 2003405729A JP 2005164471 A JP2005164471 A JP 2005164471A
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temperature
conveyor belt
magnetic
sensitive
rubber composite
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JP3977323B2 (en
JP2005164471A5 (en
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Takahisa Shizuku
雫　　孝久
Masami Kikuchi
正美 菊池
Kenichi Azuma
憲一 東
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Bridgestone Corp
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Bridgestone Corp
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Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to DE112004001238T priority patent/DE112004001238T5/en
Priority to PCT/JP2004/009335 priority patent/WO2005005292A1/en
Priority to AU2004255610A priority patent/AU2004255610B2/en
Priority to US10/563,588 priority patent/US7347317B2/en
Priority to CN2004800234386A priority patent/CN1835881B/en
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  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device capable of measuring the internal temperature of a belt, in order to grasp a symptom of an accident such as cutting of a conveyor belt caused by an abnormal temperature rise, and to monitor the internal temperature of the conveyor belt. <P>SOLUTION: A magnetic field from a temperature-sensing rubber complex magnet buried in a required part of the conveyor belt is detected by a magnetic sensor fixed to the ground, and the temperature of the conveyor belt is determined from the magnitude of the detected magnetic field by utilizing the fact that the magnetic field is changed in dependence on the temperature of the required part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、コンベアベルトの温度測定方法およびコンベアベルト温度測定装置に関し、特に、搬送物が載っていても、コンベアベルトの内部の温度を直接測定することのできるものに関する。   The present invention relates to a conveyor belt temperature measurement method and a conveyor belt temperature measurement device, and more particularly to a device capable of directly measuring the temperature inside a conveyor belt even when a conveyed product is placed thereon.

大型のコンベアベルトは、天然資源の採掘現場等、人が近づけるように整備されていない現場で用いられることが多く、保守点検整備が十分行われていない状況にある。このような現場においては、例えば、コンベアベルトの一部の温度が異常に上昇して、突然、コンベアベルトが切断してしまい、作業の中断を余儀なくされることがあり、この場合、その復旧に多大の時間と費用とを要し、そのため、予防保全を行えるよう、前もって事故の予兆を検出する手段が強く望まれていたが、有効な手段がなく問題となっていた。   Large conveyor belts are often used at sites that are not maintained close to humans, such as mining sites for natural resources, and maintenance and inspection are not sufficiently performed. In such a site, for example, the temperature of a part of the conveyor belt may rise abnormally, and the conveyor belt may suddenly be cut, forcing the work to be interrupted. A lot of time and cost are required, and therefore, a means for detecting a sign of an accident in advance so that preventive maintenance can be performed has been strongly desired, but there is no problem because there is no effective means.

また、搬送物が高温の物体である場合、その熱により、コンベアベルトのゴムが劣化して破壊に至ることが多く、コンベアベルトの内部温度が所定温度以上にならないよう監視することが求められているが、実際には、コンベアベルトの表面温度を測定する方法はあっても、内部温度を測定する手段がなく問題となっていた。   In addition, when the conveyed product is a high-temperature object, the rubber of the conveyor belt is often deteriorated due to the heat, and it is required to be monitored so that the internal temperature of the conveyor belt does not exceed a predetermined temperature. However, in practice, there is a method for measuring the surface temperature of the conveyor belt, but there is no means for measuring the internal temperature, which is a problem.

本発明は、このような問題点に鑑みてなされたものであり、温度異常上昇によるコンベアベルトの切断等の事故の予兆を捉えるため、また、コンベアベルトの内部温度を監視するため、ベルトの内部温度を測定することのできる方法ならびに装置を提供することを目的とする。   The present invention has been made in view of such problems, and in order to catch signs of accidents such as cutting of the conveyor belt due to abnormal temperature rise, and to monitor the internal temperature of the conveyor belt, It is an object to provide a method and an apparatus capable of measuring temperature.

＜１＞は、走行中のコンベアベルトの温度を測定するに際し、
コンベアベルトの所要部分に埋設された感温ゴム複合磁石からの磁界を、大地に対して固定された磁気センサで検出し、この磁界が前記所要部分の温度に依存して変化することを利用して、検出された磁界の大きさからコンベアベルトの温度を求めるコンベアベルトの温度測定方法である。 <1> is for measuring the temperature of the running conveyor belt,
Utilizing the fact that the magnetic field from the thermosensitive rubber composite magnet embedded in the required part of the conveyor belt is detected by a magnetic sensor fixed to the ground, and this magnetic field changes depending on the temperature of the required part. This is a conveyor belt temperature measurement method for determining the temperature of the conveyor belt from the magnitude of the detected magnetic field.

＜２＞は、＜１＞のコンベアベルトの温度測定方法に用いられる温度測定装置であって、
コンベアベルトの所要部分に埋設され両端に互いに逆極性の磁極を有する感温ゴム複合磁石と、この感温ゴム複合磁石からの磁界を検出する磁気センサとを具えてなり、
感温ゴム複合磁石は、所定温度範囲における温度変化に応じて磁力が変化する特性を有してなるコンベアベルト温度測定装置である。 <2> is a temperature measuring device used in the temperature measuring method of the conveyor belt of <1>,
A temperature-sensitive rubber composite magnet embedded in a required portion of the conveyor belt and having magnetic poles of opposite polarities at both ends, and a magnetic sensor for detecting a magnetic field from the temperature-sensitive rubber composite magnet,
The temperature-sensitive rubber composite magnet is a conveyor belt temperature measuring device having a characteristic that the magnetic force changes according to a temperature change in a predetermined temperature range.

＜３＞は、＜２＞において、感温ゴム複合磁石は、永久磁石と、この永久磁石の一方の磁極にこれを延長させるように連結された感温磁性体とよりなり、この感温磁性体は、前記温度範囲において温度の上昇に対して透磁率が低下する特性を有し、
永久磁石および感温磁性体は、磁性粉をゴムに混合分散してなるボンド磁性体より形成されてなるコンベアベルト温度測定装置である。 <3> is the temperature-sensitive rubber composite magnet according to <2>, wherein the temperature-sensitive rubber composite magnet includes a permanent magnet and a temperature-sensitive magnetic body connected to one magnetic pole of the permanent magnet so as to extend the magnet. The body has the property that the permeability decreases with increasing temperature in the temperature range,
The permanent magnet and the temperature-sensitive magnetic body are a conveyor belt temperature measuring device formed of a bond magnetic body obtained by mixing and dispersing magnetic powder in rubber.

＜４＞は、＜２＞において、感温ゴム複合磁石は、永久磁石と、この永久磁石の周囲に配置された感温磁性体とよりなり、この感温磁性体は、前記温度範囲において温度の上昇に対して透磁率が低下する特性を有し、
永久磁石および感温磁性体は、磁性粉をゴムに混合分散してなるボンド磁性体より形成されてなるコンベアベルト温度測定装置である。 <4> is the thermosensitive rubber composite magnet according to <2>, wherein the temperature-sensitive rubber composite magnet includes a permanent magnet and a temperature-sensitive magnetic body disposed around the permanent magnet, and the temperature-sensitive magnetic body has a temperature within the temperature range. Has the characteristic that the permeability decreases with respect to the rise of
The permanent magnet and the temperature-sensitive magnetic body are a conveyor belt temperature measuring device formed of a bond magnetic body obtained by mixing and dispersing magnetic powder in rubber.

＜５＞は、＜２＞〜＜４＞のいずれかにおいて、磁気センサのもっとも近くを通過するコンベアベルト部分の幅方向位置を規制する幅方向ガイドを設けてなるコンベアベルト温度測定装置である。   <5> is a conveyor belt temperature measuring device provided with a width direction guide for regulating a position in the width direction of the conveyor belt portion that passes closest to the magnetic sensor in any one of <2> to <4>.

＜６＞は、＜２＞〜＜５＞のいずれかにおいて、前記磁気センサを、搬送物をコンベアベルトに投入する投入部の、コンベアベルト走行方向下流側近傍に設けてなるコンベアベルト温度測定装置である。   <6> is the conveyor belt temperature measuring device according to any one of <2> to <5>, wherein the magnetic sensor is provided in the vicinity of the downstream side in the conveyor belt traveling direction of the input unit that inputs the conveyed product into the conveyor belt. It is.

＜１＞によれば、磁気センサで検出された磁界の大きさから、感温ゴム複合磁石が埋設されたコンベアベルトの部分の温度を求めるので、高温の搬送物がコンベアベルトに載っていても、搬送物の温度にかかわりなく、直接、コンベアベルトの内部温度を測定することができ、事故の予兆を捉え、あるいは、コンベアベルトの寿命の監視に供することができる。   According to <1>, since the temperature of the portion of the conveyor belt in which the temperature-sensitive rubber composite magnet is embedded is obtained from the magnitude of the magnetic field detected by the magnetic sensor, even if a high-temperature conveyed object is placed on the conveyor belt Regardless of the temperature of the conveyed product, the internal temperature of the conveyor belt can be directly measured, a sign of an accident can be detected, or the life of the conveyor belt can be monitored.

＜２＞によれば、感温ゴム複合磁石は、所定温度範囲における温度変化に応じて磁力が変化する特性を有するので、感温ゴム複合磁石の磁力は、その温度と一義的に関係付けることができ、磁気センサが検出した磁界の大きさから、感温ゴム複合磁石の温度、ひいてはこれが埋設されているコンベアベルトの部分の温度を求めることができる。   According to <2>, since the temperature-sensitive rubber composite magnet has a characteristic that the magnetic force changes according to the temperature change in the predetermined temperature range, the magnetic force of the temperature-sensitive rubber composite magnet is uniquely related to the temperature. From the magnitude of the magnetic field detected by the magnetic sensor, the temperature of the temperature-sensitive rubber composite magnet, and hence the temperature of the portion of the conveyor belt in which it is embedded, can be obtained.

＜３＞によれば、感温ゴム複合磁石を、永久磁石と、温度が上昇すると透磁率が低下する感温磁性体とを直列に連結したので、コンベアベルトの所要部分の温度が異常に上昇すると感温磁性体の透磁率は低下して、感温ゴム複合磁石からの磁界は減少し、感温ゴム複合磁石に前記特性を簡易に具備させることができ、また、これを永久磁石だけで構成した場合に対比して、温度の変化に対して磁力を高感度に変化させることができる。   According to <3>, since the temperature-sensitive rubber composite magnet is connected in series with the permanent magnet and the temperature-sensitive magnetic body whose permeability decreases as the temperature rises, the temperature of the required portion of the conveyor belt rises abnormally Then, the magnetic permeability of the temperature-sensitive magnetic material decreases, the magnetic field from the temperature-sensitive rubber composite magnet decreases, and the temperature-sensitive rubber composite magnet can be easily provided with the above characteristics. Compared with the case where it comprises, a magnetic force can be changed with high sensitivity with respect to the change of temperature.

＜４＞によれば、感温ゴム複合磁石を、永久磁石と、この永久磁石の周囲に配置された感温磁性体とで構成したので、コンベアベルトの所要部分の温度が正常である場合には、永久磁石の一方の磁極から出た磁力線は透磁率の高い感温磁性体の中を通って他の磁極に入り、感温ゴム複合磁石の外に形成される磁界は小さいが、コンベアベルトの所要部分の温度が異常に上昇すると感温磁性体の透磁率は低下して、永久磁石の一方の磁極から出て感温磁性体の中を通って他の磁極に入り磁力線の数は低下し、その分、感温ゴム複合磁石からの磁界は増加し、感温ゴム複合磁石に前記特性を簡易に具備させることができ、また、これを永久磁石だけで構成した場合に対比して、温度の変化に対して磁力を高感度に変化させることができる。   According to <4>, since the temperature-sensitive rubber composite magnet is composed of a permanent magnet and a temperature-sensitive magnetic body disposed around the permanent magnet, the temperature of a required portion of the conveyor belt is normal. The magnetic field lines from one magnetic pole of the permanent magnet enter the other magnetic pole through the temperature-sensitive magnetic body having high permeability, and the magnetic field formed outside the temperature-sensitive rubber composite magnet is small, but the conveyor belt When the temperature of the required part of the magnet rises abnormally, the magnetic permeability of the temperature-sensitive magnetic material decreases, and the number of magnetic lines of force decreases from one magnetic pole of the permanent magnet, through the temperature-sensitive magnetic material and into the other magnetic pole. Therefore, the magnetic field from the temperature-sensitive rubber composite magnet is increased, and the temperature-sensitive rubber composite magnet can be easily provided with the above-mentioned characteristics. Magnetic force can be changed with high sensitivity to changes in temperature.

また、＜３＞および＜４＞によれば、感温ゴム複合磁石を構成する、永久磁石および感温磁性体を、磁性粉をゴムに混合分散してなるボンド磁性体より形成したので、感温ゴム複合磁石は、コンベアベルトの大きな変形に対して追従して変形することができ、よって、感温ゴム複合磁石がコンベアベルトからはがれたり、コンベアベルトの正常な変形を阻害したり、あるいは、感温ゴム複合磁石が破壊したりするのを防止することができる。   Further, according to <3> and <4>, the permanent magnet and the temperature-sensitive magnetic body constituting the temperature-sensitive rubber composite magnet are formed from a bond magnetic body obtained by mixing and dispersing magnetic powder in rubber. The warm rubber composite magnet can be deformed following the large deformation of the conveyor belt, so that the temperature sensitive rubber composite magnet peels off the conveyor belt, hinders normal deformation of the conveyor belt, or It is possible to prevent the temperature-sensitive rubber composite magnet from being broken.

＜５＞によれば、磁気センサのもっとも近くを通過するコンベアベルト部分の幅方向位置を規制する幅方向ガイドを設けたので、コンベアベルトの幅方向の蛇行や位置ずれによる計測誤差を排除することができ、測定をより高精度に行うことができる。   <5> According to <5>, since the width direction guide for regulating the width direction position of the conveyor belt portion that passes closest to the magnetic sensor is provided, measurement errors due to meandering and displacement in the width direction of the conveyor belt are eliminated. And measurement can be performed with higher accuracy.

＜６＞によれば、磁気センサを、搬送物をコンベアベルトに投入する投入部の、コンベアベルト走行方向下流側近傍に設けたので、高温の搬送物の、コンベアベルト温度への影響を知ることができ、搬送物の管理、規制に供することができる。   According to <6>, since the magnetic sensor is provided in the vicinity of the downstream side in the conveyor belt traveling direction of the feeding unit for feeding the conveyed product to the conveyor belt, the influence of the high-temperature conveyed product on the conveyor belt temperature is known. Can be used for the management and regulation of transported goods.

本発明の実施形態について、図に基づいて説明する。図１は、第一の実施形態のコンベアベルト温度測定装置を示す側面図、図２は、図１のＡ部を拡大して示す断面図、図３は、図１のＢ−Ｂ矢視に対応する正面図、図４（ａ）は、感温ゴム複合磁石を示す正面図、また、図４（ｂ）は、図４（ａ）のｂ−ｂ矢視に対応する平面図である。コンベアベルト温度測定装置１は、プーリ１２に巻掛けられたコンベアベルト１１の所定部分に埋設された感温ゴム複合磁石２と、大地に対して固定され、感温ゴム複合磁石２からの磁界を検出する磁気センサ３とを具える。   Embodiments of the present invention will be described with reference to the drawings. 1 is a side view showing the conveyor belt temperature measuring device of the first embodiment, FIG. 2 is an enlarged cross-sectional view showing a portion A of FIG. 1, and FIG. 3 is a view taken along arrow BB in FIG. Corresponding front view, FIG. 4 (a) is a front view showing a temperature-sensitive rubber composite magnet, and FIG. 4 (b) is a plan view corresponding to the view taken along the line bb of FIG. 4 (a). The conveyor belt temperature measuring device 1 includes a temperature-sensitive rubber composite magnet 2 embedded in a predetermined portion of a conveyor belt 11 wound around a pulley 12 and a magnetic field from the temperature-sensitive rubber composite magnet 2 fixed to the ground. And a magnetic sensor 3 to be detected.

感温ゴム複合磁石２は円柱状をなし、永久磁石２１と、永久磁石２１の一方の磁極、図４に示す例ではＮ極に、これを延長させるように連結された感温磁性体２２とで構成される。そして、永久磁石２１の、感温磁性体２２と連結されない側の磁極と、永久磁石２１によって磁化された感温磁性体２２の、永久磁石２１と反対側の端とが、感温ゴム複合磁石２の両磁極として機能する。   The temperature-sensitive rubber composite magnet 2 has a cylindrical shape, and a temperature-sensitive magnetic body 22 connected to extend the permanent magnet 21 and one magnetic pole of the permanent magnet 21, in the example shown in FIG. Consists of. The magnetic pole of the permanent magnet 21 on the side not connected to the temperature-sensitive magnetic body 22 and the end of the temperature-sensitive magnetic body 22 magnetized by the permanent magnet 21 on the side opposite to the permanent magnet 21 are a temperature-sensitive rubber composite magnet. 2 functions as both magnetic poles.

本実施形態のコンベアベルト温度測定装置１においては、感温ゴム複合磁石２の両磁極を結んだ線は、コンベアベルト１１の厚さ方向に向けて配置され、図２において、Ｍで示す磁力線を形成するが、磁極の向きは、特にこれに限定されるものではない。そして、感温ゴム複合磁石２は、コンベアベルト１１の走行に伴って、垂直面Ｌ内を移動する。   In the conveyor belt temperature measuring device 1 of the present embodiment, the line connecting both magnetic poles of the temperature-sensitive rubber composite magnet 2 is arranged in the thickness direction of the conveyor belt 11, and in FIG. However, the direction of the magnetic pole is not particularly limited to this. The thermosensitive rubber composite magnet 2 moves in the vertical plane L as the conveyor belt 11 travels.

永久磁石２１および感温磁性体２２は、それぞれ、磁石材料よりなる磁性粉および、高透磁率磁性体すなわち軟質磁性材料よりなる磁性粉を配合ゴムに分散混合してできたボンド磁性体により形成され、感温ゴム複合磁石２は、永久磁石２１と感温磁性体２２とを円筒状に一体化して形成される。その結果、感温ゴム複合磁石２は高い柔軟性をもち、コンベアベルト１１の大きな変形にも追従して変形することができる。   The permanent magnet 21 and the temperature-sensitive magnetic body 22 are each formed of a magnetic bond made of a magnetic material and a bond magnetic body made by dispersing and mixing a magnetic powder made of a high permeability magnetic body, that is, a soft magnetic material, into a compounded rubber. The temperature-sensitive rubber composite magnet 2 is formed by integrating a permanent magnet 21 and a temperature-sensitive magnetic body 22 into a cylindrical shape. As a result, the thermosensitive rubber composite magnet 2 has high flexibility and can be deformed following the large deformation of the conveyor belt 11.

永久磁石２１を構成するボンド磁性体の磁性粉は、安価なフェライトを用いることもできるが、ネオジウム鉄ボロン、サマリウムコバルトあるいはサマリウム鉄窒素などの希土類磁石や、アルニコ磁石などを用いることにより、強い磁界を形成することができる。   As the magnetic powder of the bond magnetic material constituting the permanent magnet 21, an inexpensive ferrite can be used, but a strong magnetic field can be obtained by using a rare earth magnet such as neodymium iron boron, samarium cobalt or samarium iron nitrogen, an alnico magnet, or the like. Can be formed.

また、感温磁性体２２は、所要の温度、例えば、コンベアベルト１１の所要部分の許容温度範囲の上限付近にキュリー点を有する軟質磁性材料で形成され、この感温磁性体２２は、キュリー点よりずっと低い温度では高い透磁率を有するが、キュリー点を超える温度においては磁化を喪失する結果、透磁率も極めて小さくなる特性を有する。   Further, the temperature-sensitive magnetic body 22 is formed of a soft magnetic material having a Curie point near a required temperature, for example, an upper limit of an allowable temperature range of a required portion of the conveyor belt 11, and the temperature-sensitive magnetic body 22 has a Curie point. At a much lower temperature, it has a high magnetic permeability, but at temperatures above the Curie point, it loses magnetization, resulting in a characteristic that the magnetic permeability is extremely small.

感温ゴム複合磁石２が埋設されたコンベアベルト部分の温度をＴｘとしたとき、Ｔｘがキュリー点よりずっと低い温度であるときは、感温磁性体２２の透磁率は高いので感温ゴム複合磁石２の磁力は大きく保たれるが、Ｔｘがキュリー点を超えると感温磁性体２２は透磁率の低い非磁性体となり、その結果、感温ゴム複合磁石２全体の磁極から空間に放射される磁力線の数も少なくなり磁力が低下し、磁気センサ３で検出する磁界は、コンベアベルト部分の温度Ｔｘに応じて小さくなる。   When the temperature of the conveyor belt portion in which the temperature-sensitive rubber composite magnet 2 is embedded is Tx, when the temperature is much lower than the Curie point, the magnetic permeability of the temperature-sensitive magnetic body 22 is high, so the temperature-sensitive rubber composite magnet. However, when Tx exceeds the Curie point, the temperature-sensitive magnetic body 22 becomes a non-magnetic body having a low magnetic permeability, and as a result, is radiated into the space from the magnetic pole of the entire temperature-sensitive rubber composite magnet 2. The number of lines of magnetic force decreases, the magnetic force decreases, and the magnetic field detected by the magnetic sensor 3 decreases according to the temperature Tx of the conveyor belt portion.

なお、この感温磁性体２２は、温度上昇に応じて透磁率を低下させる特性に加えて、飽和磁化をも低下させる特性を有することが好ましく、このことにより、感温ゴム複合磁石２の磁力の温度変化に対する感度を一層向上させることができる。   The temperature-sensitive magnetic body 22 preferably has a characteristic of reducing the saturation magnetization in addition to the characteristic of reducing the magnetic permeability in response to a temperature rise, whereby the magnetic force of the temperature-sensitive rubber composite magnet 2 is reduced. The sensitivity to changes in temperature can be further improved.

このような特性を有する感温磁性体２２を構成するボンド磁性体の磁性粉は、ＮｉＣｕ、ＮｉＡｌ、ＮｉＣｒ、ＮｉＶ、ＮｉＳｉ，ＮｉＴｉ、ＮｉＭｏ，ＮｉＳｂ，ＮｉＺｎを含むＮｉ系合金、Ｍｎ−Ｃｕ系合金、Ｎｉ−Ｚｎ−Ｆｅ２Ｏ４系合金、Ｍｎ−Ｚｎ−Ｆｅ２Ｏ３系合金、Ｆｅ−Ｎｉ系合金、Ｎｉ−Ｃｕ系合金、もしくは、Ｆｅ−Ｎｉ−Ｃｒ−Ｓｉ系合金などのうちから、検知したい温度の領域に応じて、適宜選択して用いることができる。 The magnetic powder of the bond magnetic body constituting the temperature-sensitive magnetic body 22 having such characteristics is Ni-based alloy containing NiCu, NiAl, NiCr, NiV, NiSi, NiTi, NiMo, NiSb, NiZn, or Mn-Cu-based alloy. Ni—Zn—Fe 2 O 4 alloy, Mn—Zn—Fe 2 O 3 alloy, Fe—Ni alloy, Ni—Cu alloy, Fe—Ni—Cr—Si alloy, etc. Depending on the temperature range to be detected, it can be appropriately selected and used.

また、感温ゴム複合磁石２は、必要に応じて、コンベアベルト１１の補強材となるスチールコード層１１ｂによって区切られる表裏いずれの側のゴム部分に埋設することもできる。   Moreover, the temperature-sensitive rubber composite magnet 2 can be embedded in the rubber portion on either the front or back side separated by the steel cord layer 11b serving as a reinforcing material for the conveyor belt 11 as necessary.

磁気センサ３は、高い検出感度を得るため、感温ゴム複合磁石２の通過位置にできるだけ近くになるようこれを設けるのが好ましく、コンベアベルト１１の、感温ゴム複合磁石２が埋設された側の表面に近接した垂直面Ｌ上に配置される。   In order to obtain high detection sensitivity, the magnetic sensor 3 is preferably provided as close to the passing position of the temperature-sensitive rubber composite magnet 2 as possible. The side of the conveyor belt 11 on which the temperature-sensitive rubber composite magnet 2 is embedded is provided. Is disposed on a vertical plane L close to the surface.

また、磁気センサ３のもっとも近くを通過するコンベアベルト部分の幅方向位置を規制する幅方向ガイド９が設けられ、幅方向ガイド９はコンベアベルト１１の幅方向端が所定位置より幅方向外側に変位しないよう、コンベアベルト１１の幅方向端に当接してこれを規制するよう作用する。   In addition, a width direction guide 9 is provided that regulates the position in the width direction of the conveyor belt portion that passes closest to the magnetic sensor 3, and the width direction end of the width direction guide 9 is displaced outward from the predetermined position in the width direction. In order to prevent this, it acts to abut against the end of the conveyor belt 11 in the width direction and regulate it.

さらに、この部分のコンベアベルト部分と磁気センサ３との離隔距離を一定に保つための厚さ方向ガイド９ａも設けられる。   Furthermore, a thickness direction guide 9a for keeping the separation distance between the conveyor belt portion of this portion and the magnetic sensor 3 constant is also provided.

図５は、コンベアベルト温度測定装置１の制御部分を示すブロック線図であり、コンベアベルト温度測定装置１は、磁気センサ３からの測定値を入力し、入力した値からベルトの温度を演算して求め、演算結果を電波により送信する現場制御装置５と、現場制御装置５からの演算結果を受信して、演算結果を出力端末７に出力しあるいは温度が所定の閾値を超えた場合に警報を出す中央制御装置６とを具える。   FIG. 5 is a block diagram showing the control part of the conveyor belt temperature measuring device 1. The conveyor belt temperature measuring device 1 inputs the measured value from the magnetic sensor 3 and calculates the belt temperature from the input value. The field control device 5 that transmits the calculation result by radio wave and the calculation result from the field control device 5 is received and the calculation result is output to the output terminal 7 or when the temperature exceeds a predetermined threshold And a central control unit 6 for generating

なお、上記の説明において、コンベアベルト１１の温度を求める演算手段を現場制御装置５に配置したが、これを中央制御装置６に設けることもでき、その場合、現場制御装置５は、磁気センサ３からのデータを中央制御装置６に送信するだけのトランスミッタとして機能する。   In the above description, the calculation means for determining the temperature of the conveyor belt 11 is arranged in the field control device 5, but this can also be provided in the central control device 6, and in this case, the field control device 5 includes the magnetic sensor 3. It functions as a transmitter that only transmits data from the central controller 6 to the central controller 6.

以上のように構成されたコンベアベルト温度測定装置１を用いて、コンベアベルトの所要部分の温度を求める方法について説明する。図６（ａ）は、磁気センサ３で検知された磁力の時間変化を表すグラフであり、コンベアベルトの所要部分の温度Ｔｘが正常範囲であるときは、前述の説明のように感温ゴム複合磁石２は強い磁力を有するので、コンベアベルト１１の走行に伴って、大地に対して固定された磁気センサ３の近くを感温ゴム複合磁石２Ａが通過する際、磁気センサ３には、ピーク状の磁力の時間変化が検出される。   A method for determining the temperature of a required portion of the conveyor belt using the conveyor belt temperature measuring apparatus 1 configured as described above will be described. FIG. 6A is a graph showing the time change of the magnetic force detected by the magnetic sensor 3, and when the temperature Tx of the required portion of the conveyor belt is in the normal range, the temperature-sensitive rubber composite as described above. Since the magnet 2 has a strong magnetic force, when the temperature-sensitive rubber composite magnet 2A passes near the magnetic sensor 3 fixed to the ground as the conveyor belt 11 travels, the magnetic sensor 3 has a peak shape. Changes in the magnetic force over time are detected.

検出されたピークの高さＦ０は、感温ゴム複合磁石２からの磁界の大きさにより変化するが、前述の説明のように、温度Ｔｘが上昇すると磁界は弱くなるので、ピークの大きさも、図６（ｂ）に示すように、Ｆ１と小さくなる。そして、予め、ピークの大きさと温度との関係式を準備しておくことにより、ピークの大きさＦ０から、温度Ｔｘを逆算して求めることができる。 The detected peak height F 0 varies depending on the magnitude of the magnetic field from the temperature-sensitive rubber composite magnet 2, but as described above, the magnetic field becomes weaker as the temperature Tx rises. as shown in FIG. 6 (b), smaller and F 1. Then, preliminarily, by previously preparing a relational expression between the magnitude and temperature of the peak, the magnitude F 0 of the peak can be determined by calculating back the temperature Tx.

ここで、感温ゴム複合磁石２を、必要に応じて所定間隔、例えば１００ｍ間隔で、ベルト長さ方向に配置することにより、コンベアベルト１１の全長にわたって各位置における温度を測定することができる。また、搬送物が投入される点Ｐの近傍の下流の点は、搬送物が高温である場合、コンベアベルト１１の劣化に対する影響が大きく管理する重要性が高いので、磁気センサは、これを検出する位置に設けるのが好ましい。   Here, the temperature-sensitive rubber composite magnet 2 can be measured at each position over the entire length of the conveyor belt 11 by disposing the temperature-sensitive rubber composite magnet 2 in the belt length direction at a predetermined interval, for example, an interval of 100 m as required. Further, the downstream point in the vicinity of the point P at which the conveyed product is thrown has a high importance of managing the influence on the deterioration of the conveyor belt 11 when the conveyed product is high in temperature, so the magnetic sensor detects this. It is preferable to provide it at a position where

図７（ａ）は第二の実施形態のコンベアベルト温度測定装置に埋設される感温ゴム複合磁石２Ａを示す正面図、また、図７（ｂ）は、図７（ａ）のｂ−ｂ矢視に対応する平面図である。第二の実施形態のコンベアベルト温度測定装置は、図１〜図３に示した第一の実施形態のコンベアベルト温度測定装置１における感温ゴム複合磁石２を、図４に示した感温ゴム複合磁石２Ａに置き換えたものであり、感温ゴム複合磁石２Ａは円柱状をなし、円柱状の永久磁石２５と、その周囲に配置された感温磁性体２６とで構成され、永久磁石２５の両磁極が、そのまま、感温ゴム複合磁石２Ａの両磁極としてそれぞれ機能する。   FIG. 7 (a) is a front view showing a temperature-sensitive rubber composite magnet 2A embedded in the conveyor belt temperature measuring device of the second embodiment, and FIG. 7 (b) is a cross-sectional view taken along line bb in FIG. 7 (a). It is a top view corresponding to an arrow view. The conveyor belt temperature measuring device of the second embodiment is the same as the temperature sensitive rubber composite magnet 2 in the conveyor belt temperature measuring device 1 of the first embodiment shown in FIGS. The temperature-sensitive rubber composite magnet 2A has a cylindrical shape, and is composed of a column-shaped permanent magnet 25 and a temperature-sensitive magnetic body 26 arranged around the column-shaped permanent magnet 25A. Both magnetic poles function as both magnetic poles of the temperature-sensitive rubber composite magnet 2A as they are.

本実施形態のコンベアベルト温度測定装置１においては、感温ゴム複合磁石２Ａの両磁極を結んだ線は、コンベアベルト１１の厚さ方向に向けて配置されるが、磁極の向きは、特にこれに限定されるものではない。そして、感温ゴム複合磁石２Ａは、コンベアベルト１１の走行に伴って、図３に示すところの垂直面Ｌ内を移動する。   In the conveyor belt temperature measuring device 1 of the present embodiment, the line connecting both magnetic poles of the temperature-sensitive rubber composite magnet 2A is arranged in the thickness direction of the conveyor belt 11, and the direction of the magnetic pole is particularly It is not limited to. The temperature-sensitive rubber composite magnet 2A moves in the vertical plane L shown in FIG. 3 as the conveyor belt 11 runs.

永久磁石２５および感温磁性体２６の材質、特性ならびに形成方法は第一の実施形態に示したところと同様であり、詳細の説明を省略する。   The material, characteristics, and formation method of the permanent magnet 25 and the temperature-sensitive magnetic body 26 are the same as those described in the first embodiment, and detailed description thereof is omitted.

感温ゴム複合磁石２Ａが埋設されたコンベアベルト部分の温度をＴｘとしたとき、Ｔｘがキュリー点よりずっと低い温度にあるときは、感温磁性体２６の透磁率は高いので、永久磁石２５の一方の磁極から出た磁力線のほとんどは感温磁性体２６の中を通って他の磁極に入り、感温ゴム複合磁石２Ａの外に形成される磁界は小さいが、温度Ｔｘが異常に上昇すると、感温磁性体２６の透磁率は低下して、永久磁石２５の一方の磁極から出て感温磁性体２６の中を通り他の磁極に入る磁力線の数は低下し、その分、磁気センサ３で検出する、感温ゴム複合磁石２Ａからの磁界は増加する。   When the temperature of the conveyor belt portion in which the temperature-sensitive rubber composite magnet 2A is embedded is Tx, the magnetic permeability of the temperature-sensitive magnetic body 26 is high when Tx is much lower than the Curie point. Most of the lines of magnetic force from one magnetic pole pass through the temperature-sensitive magnetic body 26 and enter the other magnetic pole, and the magnetic field formed outside the temperature-sensitive rubber composite magnet 2A is small, but the temperature Tx rises abnormally. The magnetic permeability of the temperature-sensitive magnetic body 26 decreases, and the number of lines of magnetic force that exit from one magnetic pole of the permanent magnet 25 and pass through the temperature-sensitive magnetic body 26 and enter the other magnetic pole decreases. The magnetic field from the temperature-sensitive rubber composite magnet 2A detected at 3 increases.

以上のように構成された第二の実施形態のコンベアベルト温度測定装置を用いて、コンベアベルトの所要部分の温度を求める方法について説明する。図８（ａ）は、磁気センサ３で検知された磁力の時間変化を表すグラフであり、コンベアベルトの所要部分の温度Ｔｘが正常範囲であるときは、前述の説明のように感温ゴム複合磁石２Ａから発生する磁界は小さいので、感温ゴム複合磁石２Ａの埋設されたコンベアベルト部分が磁気センサ３を横切っても、磁気センサ３で検出する磁力は、Ｆ２と小さいが、温度Ｔｘが異常に上昇すると、図８（ｂ）に示すように、磁気センサ３で検出する磁力は、Ｆ３と増加する。そして、予め、ピークの大きさと温度との関係式を準備しておくことにより、ピークの大きさＦ３から、感温ゴム複合磁石２Ａが埋設されているコンベアベルト部分の温度Ｔｘを逆算して求めることができる。 A method for determining the temperature of a required portion of the conveyor belt using the conveyor belt temperature measuring apparatus of the second embodiment configured as described above will be described. FIG. 8A is a graph showing the time change of the magnetic force detected by the magnetic sensor 3, and when the temperature Tx of the required portion of the conveyor belt is in the normal range, the temperature-sensitive rubber composite is used as described above. since the magnetic field generated from the magnet 2A is small, but also buried a conveyor belt portion of the temperature-sensitive rubber compound magnet 2A is across the magnetic sensor 3, the magnetic force detected by the magnetic sensor 3 is smaller and F 2, the temperature Tx is When abnormally rises, as shown in FIG. 8 (b), the magnetic force detected by the magnetic sensor 3 increases as F 3. Then, preliminarily, by previously preparing a relational expression between the magnitude and temperature of the peak, the magnitude F 3 peaks, and calculated back temperature Tx of the conveyor belt portion temperature-sensitive rubber compound magnet 2A is embedded Can be sought.

本発明に係る第一の実施形態のコンベアベルト温度測定装置を示す側面図である。It is a side view which shows the conveyor belt temperature measuring apparatus of 1st embodiment which concerns on this invention. 図１のＡ部を拡大して示す断面図である。It is sectional drawing which expands and shows the A section of FIG. 図１のＢ−Ｂ矢視に対応する正面図である。It is a front view corresponding to the BB arrow of FIG. 感温ゴム複合磁石の構造を示す正面図および平面図である。It is the front view and top view which show the structure of a temperature sensitive rubber composite magnet. コンベアベルト温度測定装置の制御部分を示すブロック線図である。It is a block diagram which shows the control part of a conveyor belt temperature measuring apparatus. 磁気センサで検知された磁力の時間変化を表すグラフである。It is a graph showing the time change of the magnetic force detected with the magnetic sensor. 本発明に係る第二の実施形態のコンベアベルト温度測定装置に用いられる感温ゴム複合磁石の構造を示す正面図および平面図である。It is the front view and top view which show the structure of the temperature sensitive rubber composite magnet used for the conveyor belt temperature measuring apparatus of 2nd embodiment which concerns on this invention. 磁気センサで検知された磁力の時間変化を表すグラフである。It is a graph showing the time change of the magnetic force detected with the magnetic sensor.

符号の説明Explanation of symbols

１ コンベアベルト温度測定装置
２、２Ａ 感温ゴム複合磁石
３ 磁気センサ
５ 現場制御装置
６ 中央制御装置
７ 出力端末
９ 幅方向ガイド
９ａ 厚さ方向ガイド
１１ コンベアベルト
１１ｂ スチールコード層
１２ プーリ
２１ 永久磁石
２２ 感温磁性体
２５ 永久磁石
２６ 感温磁性体 DESCRIPTION OF SYMBOLS 1 Conveyor belt temperature measuring device 2, 2A Temperature sensitive rubber compound magnet 3 Magnetic sensor 5 Field control device 6 Central control device 7 Output terminal 9 Width direction guide 9a Thickness direction guide 11 Conveyor belt 11b Steel cord layer 12 Pulley 21 Permanent magnet 22 Temperature-sensitive magnetic material 25 Permanent magnet 26 Temperature-sensitive magnetic material

Claims (6)

走行中のコンベアベルトの温度を測定するに際し、
コンベアベルトの所要部分に埋設された感温ゴム複合磁石からの磁界を、大地に対して固定された磁気センサで検出し、この磁界が前記所要部分の温度に依存して変化することを利用して、検出された磁界の大きさからコンベアベルトの温度を求めるコンベアベルトの温度測定方法。 When measuring the temperature of a running conveyor belt,
Utilizing the fact that the magnetic field from the thermosensitive rubber composite magnet embedded in the required part of the conveyor belt is detected by a magnetic sensor fixed to the ground, and this magnetic field changes depending on the temperature of the required part. And measuring the temperature of the conveyor belt from the detected magnetic field. 請求項１に記載のコンベアベルトの温度測定方法に用いられる温度測定装置であって、
コンベアベルトの所要部分に埋設され両端に互いに逆極性の磁極を有する感温ゴム複合磁石と、この感温ゴム複合磁石からの磁界を検出する磁気センサとを具えてなり、
感温ゴム複合磁石は、所定温度範囲における温度変化に応じて磁力が変化する特性を有してなるコンベアベルト温度測定装置。 A temperature measuring device used in the temperature measuring method for a conveyor belt according to claim 1,
A temperature-sensitive rubber composite magnet embedded in a required portion of the conveyor belt and having magnetic poles of opposite polarities at both ends, and a magnetic sensor for detecting a magnetic field from the temperature-sensitive rubber composite magnet,
The temperature-sensitive rubber composite magnet is a conveyor belt temperature measuring device having a characteristic that the magnetic force changes according to a temperature change in a predetermined temperature range. 感温ゴム複合磁石は、永久磁石と、この永久磁石の一方の磁極にこれを延長させるように連結された感温磁性体とよりなり、この感温磁性体は、前記温度範囲において温度の上昇に対して透磁率が低下する特性を有し、
永久磁石および感温磁性体は、磁性粉をゴムに混合分散してなるボンド磁性体より形成されてなる請求項２に記載のコンベアベルト温度測定装置。 The temperature-sensitive rubber composite magnet is composed of a permanent magnet and a temperature-sensitive magnetic body connected to one of the magnetic poles of the permanent magnet so as to extend it, and the temperature-sensitive magnetic body increases in temperature in the temperature range. Has a characteristic that the permeability decreases,
The conveyor belt temperature measuring device according to claim 2, wherein the permanent magnet and the temperature-sensitive magnetic body are formed of a bond magnetic body obtained by mixing and dispersing magnetic powder in rubber. 感温ゴム複合磁石は、永久磁石と、この永久磁石の周囲に配置された感温磁性体とよりなり、この感温磁性体は、前記温度範囲において温度の上昇に対して透磁率が低下する特性を有し、
永久磁石および感温磁性体は、磁性粉をゴムに混合分散してなるボンド磁性体より形成されてなる請求項２に記載のコンベアベルト温度測定装置。 The temperature-sensitive rubber composite magnet is composed of a permanent magnet and a temperature-sensitive magnetic body arranged around the permanent magnet, and the temperature-sensitive magnetic body has a permeability that decreases with increasing temperature in the temperature range. Has characteristics,
The conveyor belt temperature measuring device according to claim 2, wherein the permanent magnet and the temperature-sensitive magnetic body are formed of a bond magnetic body obtained by mixing and dispersing magnetic powder in rubber. 磁気センサのもっとも近くを通過するコンベアベルト部分の幅方向位置を規制する幅方向ガイドを設けてなる請求項２〜４のいずれかに記載のコンベアベルト温度測定装置。   The conveyor belt temperature measuring device according to any one of claims 2 to 4, further comprising a width direction guide that regulates a position in a width direction of a conveyor belt portion that passes closest to the magnetic sensor. 前記磁気センサを、搬送物をコンベアベルトに投入する投入部の、コンベアベルト走行方向下流側近傍に設けてなる請求項２〜５のいずれかに記載のコンベアベルト温度測定装置。   The conveyor belt temperature measuring device according to any one of claims 2 to 5, wherein the magnetic sensor is provided in the vicinity of a downstream side in a conveyor belt traveling direction of an input portion that inputs a conveyed product into the conveyor belt.
JP2003405729A 2003-07-09 2003-12-04 Conveyor belt temperature measuring method and conveyor belt temperature measuring device Expired - Fee Related JP3977323B2 (en)

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JP2003405729A JP3977323B2 (en) 2003-12-04 2003-12-04 Conveyor belt temperature measuring method and conveyor belt temperature measuring device
PCT/JP2004/009335 WO2005005292A1 (en) 2003-07-09 2004-07-01 Method and device for measuring conveyor belt elongation, method and device for measuring conveyor belt wear extent, method and device for measuring conveyor belt temperature, rubber magnet sheet, and method of producing rubber magnet sheet
AU2004255610A AU2004255610B2 (en) 2003-07-09 2004-07-01 Method and device for measuring conveyor belt elongation, method and device for measuring conveyor belt wear extent, method and device for measuring conveyor belt temperature, rubber magnet sheet, and method of producing rubber magnet sheet
US10/563,588 US7347317B2 (en) 2003-07-09 2004-07-01 Method and device for measuring conveyor belt elongation, method and device for measuring conveyor belt wear extent, method and device for measuring conveyor belt temperature, rubber magnet sheet, and method of producing rubber magnet sheet
DE112004001238T DE112004001238T5 (en) 2003-07-09 2004-07-01 A method and apparatus for measuring the elongation of a conveyor belt, method and apparatus for measuring the wear of a conveyor belt, method and apparatus for measuring the temperature of a conveyor belt, a magnetic rubber sheet and a method for producing a magnetic rubber sheet
CN2004800234386A CN1835881B (en) 2003-07-09 2004-07-01 Method and device for measuring conveyor belt wear extent

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015035445A1 (en) * 2013-09-10 2015-03-19 Metso Minerals (Australia) Limited Infrared detection of conveyor belt faults

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015035445A1 (en) * 2013-09-10 2015-03-19 Metso Minerals (Australia) Limited Infrared detection of conveyor belt faults

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