JP2008170387A

JP2008170387A - Vibrometer

Info

Publication number: JP2008170387A
Application number: JP2007006083A
Authority: JP
Inventors: Kosuke Shibuya; 康祐渋谷
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 2007-01-15
Filing date: 2007-01-15
Publication date: 2008-07-24
Anticipated expiration: 2027-01-15
Also published as: JP4861201B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibrometer capable of preventing the tip of a detecting needle from being deformed and damaged over a long period of time. <P>SOLUTION: The casing of the vibrometer is formed of a body 1 and a cap 3 fixed on the rear end of the body 1. The detecting needle 4 is attached to the body 1 in such a way as to be axially displaceable freely. The tip of the detecting needle 4 which is urged by a temperature responding member 13 made of a shape memory alloy in the shape of a coil as a spring to push the tip of the detecting needle 4 against a detection object is projected from an aperture 14 of the body 1. The detecting needle is pushed in up to the aperture 14 of the body 1, by pushing the tip of the detecting needle 4 against the detection object and compressing the responding member 13. The amount of projection of the tip of the detecting needle 4 from the aperture 14 of the body 1 due to deformation of the responding member 13 at low temperatures is made smaller than that at high temperatures. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、蒸気配管系から蒸気を逃がさず復水を自動的に排出するスチームトラップ等の高温の被検出物の作動に伴う振動を検出して、作動の良否を確認するときに用いる振動計に関する。 The present invention relates to a vibrometer used for detecting vibrations associated with the operation of a high-temperature object to be detected such as a steam trap that automatically discharges condensate without escaping steam from the steam piping system and confirming the quality of the operation. About.

従来の振動計は、検出針を軸方向に変位自在にケーシングに取り付け、スプリングで検出針を付勢して被検出物に押し当てる検出針の先端をケーシングの開口から突出せしめ、この検出針の先端を被検出物に押し当ててスプリングを圧縮せしめることによりケーシングの開口まで押し込むものである。 In a conventional vibrometer, a detection needle is attached to a casing so as to be displaceable in the axial direction, and the tip of the detection needle that presses against the detection object by urging the detection needle with a spring protrudes from the opening of the casing. The tip is pressed against the object to be detected and the spring is compressed to push it to the opening of the casing.

スチームトラップが正常であり蒸気を逃がさず復水を排出していれば所定レベルの振動が検出され、スチームトラップが不良であり蒸気を逃がしていれば所定レベル以上の振動が検出される。また、スチームトラップが不良であり復水排出機能を喪失して詰まっていれば振動が検出されない。そのため、蒸気を逃がしているか否かを判定するためには所定レベル以上の振動であるか否かを正確に検出しなければならず、検出針を所定以上の力で被検出物に押し当てる必要がある。しかしながら、復水排出機能の喪失は振動が検出されないので、検出針を所定以上の力で被検出物に押し当てる必要がない。上記従来の振動計は、検出針の先端をケーシングの開口まで押し込むことにより、スチームトラップが復水排出機能を喪失している場合であっても、検出針を所定以上の力で被検出物に押し当てるものであるので、復水排出機能を喪失したスチームトラップを多数含む多数の被検出物の振動を検出すると比較的早期に検出針の先端が変形損傷して振動を検出できなくなる問題点があった。
実公平６−３７３０３号公報 If the steam trap is normal and the condensate is discharged without releasing steam, a predetermined level of vibration is detected, and if the steam trap is defective and steam is released, vibration of a predetermined level or higher is detected. In addition, if the steam trap is defective and the condensate discharge function is lost and clogged, vibration is not detected. Therefore, in order to determine whether or not the steam is escaped, it is necessary to accurately detect whether or not the vibration is greater than a predetermined level, and it is necessary to press the detection needle against the object to be detected with a force greater than or equal to the predetermined level. There is. However, since no vibration is detected in the loss of the condensate discharging function, there is no need to press the detection needle against the object to be detected with a predetermined force or more. The above-mentioned conventional vibrometer pushes the tip of the detection needle to the opening of the casing, so that even if the steam trap loses the condensate discharge function, the detection needle is applied to the object to be detected with a predetermined force or more. Because it is pressed, if the vibration of a large number of objects to be detected including many steam traps that have lost the condensate discharge function is detected, the tip of the detection needle will be deformed and damaged relatively early, making it impossible to detect the vibration. there were.
Japanese Utility Model Publication No. 6-37303

解決しようとする課題は、長期に渡って検出針の先端を変形損傷させることのない振動計を提供することである。 The problem to be solved is to provide a vibrometer that does not deform and damage the tip of the detection needle for a long period of time.

本発明は、検出針を軸方向に変位自在にケーシングに取り付け、スプリングで検出針を付勢して被検出物に押し当てる検出針の先端をケーシングの開口から突出せしめ、この検出針の先端を被検出物に押し当ててスプリングを圧縮せしめることによりケーシングの開口まで押し込むものにおいて、スプリングをバイメタルや形状記憶合金等の温度に応じて変形する温度応動部材により形成し、検出針先端のケーシング開口からの突出量を高温時よりも低温時に小さくすることを特徴とする。 In the present invention, the detection needle is attached to the casing so as to be displaceable in the axial direction, the tip of the detection needle that presses against the object to be detected by urging the detection needle with a spring protrudes from the opening of the casing, and the tip of the detection needle is When the spring is pressed to the object to be detected and compressed to the opening of the casing, the spring is formed by a temperature-responsive member that deforms according to the temperature of bimetal, shape memory alloy, etc., and from the casing opening at the tip of the detection needle It is characterized in that the protruding amount of is smaller at a low temperature than at a high temperature.

本発明は、スプリングをバイメタルや形状記憶合金等の温度に応じて変形する温度応動部材により形成し、検出針先端のケーシング開口からの突出量を高温時よりも低温時に小さくすることにより、長期に渡って検出針の先端を変形損傷させることがないという優れた効果を生じる。 In the present invention, the spring is formed by a temperature responsive member that deforms according to the temperature of a bimetal, a shape memory alloy, etc., and the amount of protrusion from the casing opening at the tip of the detection needle is made smaller at a low temperature than at a high temperature, so that An excellent effect is obtained that the tip of the detection needle is not deformed and damaged.

本発明の振動計は、スプリングをバイメタルや形状記憶合金等の温度に応じて変形する温度応動部材により形成し、検出針先端のケーシング開口からの突出量を高温時よりも低温時に小さくするものである。そのため、スチームトラップが復水を排出したり蒸気を逃がしたりしている高温時は検出針先端のケーシング開口からの突出量が大きく、検出針を所定以上の力で被検出物に押し当てることができ、スチームトラップが復水排出機能を喪失して詰まっている低温時は検出針先端のケーシング開口からの突出量が小さく、検出針を所定以下の力で被検出物に押し当てることができる。そのため、復水排出機能を喪失したスチームトラップを多数含む多数の被検出物の振動を検出しても長期に渡って検出針の先端を変形損傷させることがない。 In the vibration meter of the present invention, the spring is formed by a temperature-responsive member that deforms according to the temperature of a bimetal, a shape memory alloy, or the like, and the amount of protrusion from the casing opening at the tip of the detection needle is made smaller at low temperatures than at high temperatures. is there. For this reason, when the steam trap discharges condensate or escapes steam, the amount of protrusion from the casing opening at the tip of the detection needle is large, and the detection needle may be pressed against the object to be detected with a force greater than a predetermined level. Further, when the steam trap loses the condensate discharging function and is clogged, the amount of protrusion from the casing opening at the tip of the detection needle is small, and the detection needle can be pressed against the object to be detected with a predetermined force or less. Therefore, the tip of the detection needle is not deformed and damaged over a long period of time even if vibrations of a large number of objects to be detected including many steam traps that have lost the condensate discharging function are detected.

上記の技術的手段の具体例を示す実施例を説明する（図１参照）。振動計のケーシングは本体１と、本体１の後端に固定したキャップ３とから形成する。本体１内に検出針４を軸方向に変位自在に配置する。検出針４の後端に感振素子５を固定する。感振素子５は検出針４の後端に、振動伝達板６をねじ結合すると共に電極板７と圧電素子８と電極板９とウエイト１０と防振ゴム１１を挿入してナット１２で固定したものである。防振ゴム１１とキャップ３の間にスプリングとしてのコイル形状の形状記憶合金で作った温度応動部材１３を配置する。形状記憶合金１３の一端は防振ゴム１１に固定し他端はキャップ３に固定する。温度応動部材１３は温度に応じて変形し、所定温度例えば６０度以下であれば母相からマルテンサイト相にマルテンサイト変態して予め縮み記憶させておいた短い形状に変形し、検出針４の先端を本体１の開口１４から少し突出させ、所定温度以上になればマルテンサイト相から母相に逆変態して伸び記憶させておいた長い形状になり、検出針４の先端を本体１の開口１４から大きく突出させる。感振素子５で検出した電圧変動がケーブル１６ないしは無線式伝送手段により判定器（図示せず）に送られる。 An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The casing of the vibrometer is formed from a main body 1 and a cap 3 fixed to the rear end of the main body 1. A detection needle 4 is disposed in the main body 1 so as to be displaceable in the axial direction. The vibration sensing element 5 is fixed to the rear end of the detection needle 4. The vibration sensing element 5 has a vibration transmission plate 6 screwed to the rear end of the detection needle 4, and an electrode plate 7, a piezoelectric element 8, an electrode plate 9, a weight 10, and a vibration isolation rubber 11 are inserted and fixed with a nut 12. Is. A temperature responsive member 13 made of a coil-shaped shape memory alloy as a spring is disposed between the vibration-proof rubber 11 and the cap 3. One end of the shape memory alloy 13 is fixed to the anti-vibration rubber 11 and the other end is fixed to the cap 3. The temperature responsive member 13 is deformed according to the temperature, and if it is a predetermined temperature, for example, 60 degrees or less, it is transformed from the parent phase to the martensite phase and deformed into a short shape that has been preliminarily contracted and memorized. The tip is slightly protruded from the opening 14 of the main body 1, and when it reaches a predetermined temperature or more, it is transformed into a long shape that is reversely transformed from the martensite phase to the parent phase, and the tip of the detection needle 4 is opened to the opening of the main body 1. 14 protrudes greatly from 14. The voltage fluctuation detected by the vibration sensing element 5 is sent to a determination device (not shown) by the cable 16 or wireless transmission means.

次に本実施例の振動計の作用について説明する。検出針４の先端を被検出物としてのスチームトラップに押し当てて形状記憶合金１３を圧縮せしめることによりケーシング１の開口１４まで押し込む。スチームトラップの振動が検出針４を通して振動伝達板６に伝わり、圧力変動として圧電素子８に作用し電圧変動が生じる。この電圧変動が電極板７，９からケーブル１６により判定器に送られ、判定器でスチームトラップの作動の良否が判定される。スチームトラップが復水を排出したり蒸気を逃がしたりしていると高温であり、温度応動部材１３が検出針４の先端をケーシング１の開口１４から大きく突出させようとするので、検出針４が所定以上の力でスチームトラップに押し当てられる。スチームトラップが復水排出機能を喪失して詰まっていると低温であり、温度応動部材１３が検出針４の先端をケーシング１の開口１４から小さく突出させようとするので、検出針４が所定以下の力でスチームトラップに押し当てられる。 Next, the operation of the vibrometer of the present embodiment will be described. The tip of the detection needle 4 is pressed against a steam trap as an object to be detected and the shape memory alloy 13 is compressed to be pushed into the opening 14 of the casing 1. The vibration of the steam trap is transmitted to the vibration transmission plate 6 through the detection needle 4 and acts on the piezoelectric element 8 as a pressure fluctuation to cause a voltage fluctuation. This voltage fluctuation is sent from the electrode plates 7 and 9 to the determiner via the cable 16, and the determiner determines whether the steam trap is operating properly. When the steam trap discharges condensate or escapes steam, the temperature is high, and the temperature responsive member 13 tends to project the tip of the detection needle 4 from the opening 14 of the casing 1, so that the detection needle 4 Pressed against the steam trap with a force greater than a predetermined level. If the steam trap loses the condensate discharge function and is clogged, the temperature is low, and the temperature responsive member 13 attempts to make the tip of the detection needle 4 protrude slightly from the opening 14 of the casing 1, so that the detection needle 4 is below a predetermined value. Pressed against the steam trap with the power of.

本発明の振動計の断面図。Sectional drawing of the vibrometer of this invention.

符号の説明Explanation of symbols

１本体
３キャップ
４検出針
５感振素子
７圧電素子
１３形状記憶合金
１４本体の開口
DESCRIPTION OF SYMBOLS 1 Main body 3 Cap 4 Detection needle 5 Vibration sensing element 7 Piezoelectric element 13 Shape memory alloy 14 Opening of main body

Claims

検出針を軸方向に変位自在にケーシングに取り付け、スプリングで検出針を付勢して被検出物に押し当てる検出針の先端をケーシングの開口から突出せしめ、この検出針の先端を被検出物に押し当ててスプリングを圧縮せしめることによりケーシングの開口まで押し込むものにおいて、スプリングをバイメタルや形状記憶合金等の温度に応じて変形する温度応動部材により形成し、検出針先端のケーシング開口からの突出量を高温時よりも低温時に小さくすることを特徴とする振動計。
The detection needle is attached to the casing so that it can be displaced in the axial direction, and the tip of the detection needle that presses against the detection object by urging the detection needle with a spring protrudes from the opening of the casing. When the spring is pressed and compressed to the opening of the casing, the spring is formed by a temperature-responsive member that deforms according to the temperature of bimetal, shape memory alloy, etc., and the amount of protrusion from the casing opening at the tip of the detection needle is A vibrometer that is smaller at high temperatures than at high temperatures.