JPS58166189A - Insulating pipe joint - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、絶縁管継手、例えば、金属製気密容器の壁面
を貫通して取り付けたり、あるいは金楓管の中間に介在
させて絶縁を保持する目的に使用するところの中心部に
貫通孔を有する絶縁管継手に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulated pipe joint, for example, which is installed through the wall of a metal airtight container, or is used to maintain insulation by interposing it in the middle of a metal maple pipe. This invention relates to an insulating pipe joint that has a through hole in the center.

本発明Ｋか〜る絶縁管継手は、例えば、液体窒素あるい
は液体ヘリウム等、低温液体を使用する冷却装置等に、
また、ｉｏθ〜２００℃という常温より高い状態の液体
若しくは気体を絶縁を保持して流通させ−るところの化
学工業あるいは石油精製工業等の設備等に使用されるも
のであり、このような目的に使用される絶縁管継手に要
求される特性中、主なものを挙げると次のとおりである
。The insulated pipe joint according to the present invention can be used, for example, in a cooling device that uses a low-temperature liquid such as liquid nitrogen or liquid helium.
It is also used in equipment such as the chemical industry or petroleum refining industry where liquids or gases at a temperature higher than room temperature (ioθ~200°C) are distributed while maintaining insulation, and are used for such purposes. The following are the main characteristics required for the insulated pipe joints used.

まず、気密特性が良好であり、温度の急激な上昇及び下
降の反復にあっても、気密特性が低下す材料あるいは周
囲条件により低下することがない十分な浴面絶縁距離を
確保し得ること、機械的強度に富み、特に、引張り荷重
隼駅が大きく、使用中に破損の危険性がないこと、及び
、経年変化がなく長期信頼性を有すること等である。更
に、このほか、広く実用化されるためには、器壁への取
付け、あるいは、金属管との接続が容易であること、一
定流量に対して外径寸法が小さいこと、及・ひ、′。First, the airtightness is good, and even if the temperature repeatedly rises and falls rapidly, it is possible to secure a sufficient bath surface insulation distance so that the airtightness does not deteriorate due to materials or ambient conditions. It has high mechanical strength, especially a large tensile load station, so there is no risk of breakage during use, and it has long-term reliability without deterioration over time. In addition, in order for it to be widely put into practical use, it must be easy to attach to the vessel wall or connect to a metal pipe, have a small outer diameter for a constant flow rate, and .

４、製造が容易で、価格が低摩であること等が切実に要
求される。4. It is urgently required that it be easy to manufacture and have low cost.

このような絶縁管継手の場合、２（ｌ！の導管の間に電
気絶縁物を介在させた構造が一本構造になり、この場合
、特性を最も大きく支配するのは電気絶縁物である。以
下、この電気絶縁物について説明する。絶縁物に有機材
料を使用した場合には、温度が高くなったり、あるいは
上昇、下降の反復にあうと、材料自体の特性の経年変化
により、気密特性が劣化するという致命的な欠陥がある
ために、現実的には使用不可能である。次に、ガラス質
を使用した場合には、温度の急変によりひび割れを発生
すること、あるいは、機械的衝撃強度が低いという欠陥
があり、また磁器材料を使用し、低融点金属で封着した
場合もガラス質の場合と同様熱的及び機械的衝撃強度が
低いという致命的な欠陥があり、これらもまた、現実に
は使用不可能である。上記の各８％性を総合して最も優
れたものに次に詳細に説明するガラス・マイカ塑造体よ
りなる電気絶縁物がある。In the case of such an insulating pipe joint, a structure in which an electrical insulator is interposed between two (l!) conduits becomes a single-piece structure, and in this case, it is the electrical insulator that has the greatest control over the characteristics. This electrical insulator will be explained below.When an organic material is used as an insulator, when the temperature rises or rises and falls repeatedly, the airtightness of the material itself deteriorates over time. In reality, it cannot be used because it has the fatal defect of deterioration.Next, if glass is used, it may crack due to sudden changes in temperature, or its mechanical impact strength may deteriorate. Also, when using porcelain material and sealing it with a low melting point metal, there is a fatal flaw in that the thermal and mechanical impact strength is low, just like in the case of glass. In reality, it cannot be used.The most excellent electric insulating material that combines the above 8% properties is an electrical insulator made of a glass-mica plastic body, which will be described in detail below.

ガラス・マイカ塑造体とは、ガラス質の粉末とマイカの
粉末との混合物を原料とし、この原料粉末をガラス質が
軟化して加圧により流動する温度Ｋまで加熱し、−加熱
状態で加圧成形し【得る電気絶縁物の上とである。A glass/mica plastic body is made from a mixture of vitreous powder and mica powder, heated to a temperature K at which the vitreous material softens and flows under pressure, and then pressurized in a heated state. The top of the electrical insulator is molded.

ガラス・マイカ塑造体を電気絶縁物とした絶縁管継手で
、従来の要求特性に対して最も理想的なものに、先に本
発明者らが提案（％願昭５Ｓ−５／／３コ号）したもの
がある。The present inventors previously proposed an insulating pipe joint that uses a glass/mica plastic body as an electrical insulator and is the most ideal for the conventional required characteristics (%Gan Sho 5S-5//3 Co. ).

以下、これを添付図面第１図により、その構造を説明す
る。なお、第１図Ｘは製品の構成を、また第１図Ｙは製
品に機械加工する前の成形品の構造をそれぞれ示す縦断
面図である。Hereinafter, its structure will be explained with reference to FIG. 1 of the accompanying drawings. Note that FIG. 1X is a vertical sectional view showing the structure of the product, and FIG. 1Y is a longitudinal sectional view showing the structure of the molded product before being machined into the product.

図において、符号／は第１管状部材、コは第コ管状部材
、３は第１及び第コ管状部材／、コ関に設けられる電気
絶縁物であって、第１管状部材ｌは、その一端、例えば
図において筒体／−／の下一端側には外周部にねじ／−
３が形成された鍔部ｌ−コが外径側に突出して形成され
ると共に上端部には筒体／−／ＩＩＣ連続して接続部／
−＆が形成されており、また、第コ管状部材−には、上
部鍔部ｌ−一を囲むように溝部コーｌが内径部に形成さ
れると共に溝部コー１１１Ｇ鍔部ｌ−一を挿入するため
に溝部コー７に続いてその上部にねと／−、？にら合す
るねとコーーが形成され、更に下端部には接続部−一３
が形成されている。また、電気絶縁物３は、電気絶縁物
、７−／において、第１．第二管状部材ｌ、λ間に介装
して、第１．第λ管状部材ｌ、−を絶縁すると共にねじ
部／−３及び−−２と協働して軸方向の引っ張り荷重を
負荷すると共に、上部においては第１管状部材／の外周
面に、また、下部においては第コ管状部材−の内周面に
露出して沿面抵抗を有するように外周絶−物３−λ及び
内周絶縁物３−３が形成されている。In the figure, the symbol / is the first tubular member, the numeral 3 is the first and the first tubular member, and the electric insulator provided between the first and second tubular members, and the first tubular member l is one end thereof. For example, in the figure, the lower end of the cylinder /-/ has a screw /- on the outer periphery.
The flange l-co on which No. 3 is formed is formed to protrude toward the outer diameter side, and the cylindrical body /-/IIC is connected to the connecting part / at the upper end.
- & is formed, and a groove 111G is formed in the inner diameter part of the tubular member 1 to surround the upper flange l-1, and a groove 111G is inserted into the flange l-1. So, following Mizobe Co. 7, the upper part of it is /-,? A thread and a socket are formed to meet each other, and a connecting part -13 is formed at the lower end.
is formed. Further, the electrical insulator 3 is the first electrical insulator 7-/. The first. While insulating the λth tubular members l and -, and applying an axial tensile load in cooperation with the threaded parts /-3 and -2, the upper part is applied to the outer circumferential surface of the first tubular member /, and In the lower part, an outer circumferential insulator 3-λ and an inner circumferential insulator 3-3 are formed so as to be exposed to the inner circumferential surface of the tubular member and have creeping resistance.

従来の絶縁管継手は上記のように構成されるが、次にそ
の製造方法の概略を添付図面第１図に基づいて説明する
。The conventional insulated pipe joint is constructed as described above, and a method for manufacturing the same will now be explained in outline with reference to FIG. 1 of the accompanying drawings.

まず、第１管状部材７ノは、その内径部に機械加工用取
代を設けると共に下端部に支持部！が内周絶縁物３−３
が形成される間ｔＭ３’−＃を第コ管状部材−′との間
に残して設けられており、その他の部分にあっては所要
形状に形成されている。また、第コ管状部材λ′は、そ
の上端部が第１管状部材ｌ′の筒体／−／と同高に延長
して形成されると共に、下端は後−に述べる支持金上に
載置し得るよ５に外径側に段部が形成され、また、内径
部には第１管状部材／′の支持部ｔｌ　　ｇが載置され
る段部な形成すると共に第１管状部材７′の内径と同径
に内径が形成されている。First, the first tubular member 7 has a machining allowance on its inner diameter and a support portion on its lower end. is the inner circumferential insulator 3-3
tM3'-# is left between the tubular member -' and the other parts are formed into the desired shape. Further, the upper end of the second tubular member λ' is formed to extend at the same height as the cylindrical body /-/ of the first tubular member l', and the lower end is placed on a support to be described later. A stepped portion is formed on the outer diameter side of the first tubular member 5, and a stepped portion is formed on the inner diameter portion on which the supporting portion tlg of the first tubular member 7' is placed. The inner diameter is formed to be the same diameter as the inner diameter.

金具類としては、上記のように形成された第１及び第コ
管状部材／′、λ′から構成されるが、これらの使用材
料は１００℃程度の加熱条件下で所要強度を保持し得る
ものであればよく、鋼やステンレス−等は好適に使用さ
れる。The metal fittings are composed of the first and second tubular members /' and λ' formed as described above, and the materials used for these must be able to maintain the required strength under heating conditions of approximately 100°C. Any material may be used, and steel, stainless steel, etc. are preferably used.

次に成形型であるが、これは１、第コ管状部材λ′の外
周にあって成形時の第一一状部材の変形を支承する円周
方向に分割可能な壁部ｑと、壁部ｑの外径側に形成の傾
斜面に嵌合する傾斜面が内径面に形成され、壁部ダを保
持固定する一体構造の枠５と、第一一状部材ｌを下方か
ら支承する分割構造の支持金６と、第１管状部材／′の
筒体／−／及び接続部Ｉ−ダ関の境界部に形成の段部、
第コ管状部材−′の上端部並びに壁部ダにより形成の空
間部に載置される電気絶縁物を後に形成する予備成形体
りを押圧して第１．第一管状部材間の間隙部Ｊ／　Ｋ予
備成形体７を加熱充填する加圧金ｇとから構成されてい
る。Next is the mold, which consists of: 1, a wall part q that is disposed on the outer periphery of the first tubular member λ' and is divisible in the circumferential direction and supports the deformation of the first tubular member during molding; A frame 5 having an integral structure in which an inclined surface that fits into the inclined surface formed on the outer diameter side of q is formed on the inner diameter surface to hold and fix the wall portion DA, and a split structure that supports the first monolithic member l from below. a step formed at the boundary between the supporting metal 6, the cylinder body /-/ of the first tubular member /' and the connection part I-D;
The first tubular member-' is pressed against the preformed body on which the electrical insulator will later be formed, which is placed in the space formed by the upper end of the tubular member-' and the wall portion. The gap J/K between the first tubular members is made up of a pressurized metal g that heats and fills the preformed body 7.

また、予備成形体りは、その原料にはガラス質の粉末と
、マイカの粉末との混合粉末、例えば、混合比率が容量
比において３５〜ｑＯ対６５〜６０の混合粉末を使用し
、別の図示されていない成形型により、壁部ダと第１．
第一一状部材／／　、　、２／とにより形成の空間部に
挿填可能の円筒形状品に成形し、乾燥して水分を除去し
たものである。In addition, the preform is made by using a mixed powder of vitreous powder and mica powder as the raw material, for example, a mixed powder with a volume ratio of 35 to 65 to 60 qO; A mold (not shown) is used to form the wall portion Da and the first.
The first single-shaped member //, , and 2/ are formed into a cylindrical product that can be inserted into the space formed by the first member, and dried to remove moisture.

上記のように構成された各部材により、成形するために
、まず、第２図に示すように、壁部ダ、枠！及び支持金
６を組み立て、組み立てない状態の加圧金ｔと共に所定
温度に加熱する。金具は第７管状部材ｌ′を第２管状部
材−′にら通して組み立てた状態で所定温度に、また、
予備成形体７も所定温度にそれぞれ加熱する。In order to mold the members configured as described above, first, as shown in FIG. Then, the supporting metal 6 is assembled and heated to a predetermined temperature together with the unassembled pressurizing metal t. The metal fittings are heated to a predetermined temperature in the assembled state by passing the seventh tubular member l' through the second tubular member -', and
The preforms 7 are also each heated to a predetermined temperature.

このようにして加熱が完了すると、先ず、組み立てた金
具を壁部ダ内の支持金６上に挿填する。When heating is completed in this way, the assembled metal fittings are first inserted onto the support metal 6 in the wall portion.

次に予備成形体７を壁部４ｔｆ第１管状部材／の接続部
／−４（とで構成する空間部に挿填する。この場合の状
態が第一図・ＸＫ示しである。次に加圧金ざを予備成形
体７上に載置し、加圧成形機（図示せず）を用い加圧金
５を加圧する。その結果、予備成形体りは流動して、第
１及び第一管状部材／′λ′により構成する間隙部ｌを
充填し、一部は第−管状部材一′上に！Ａす、絶縁物Ｊ
−１１を構成する。Next, the preformed body 7 is inserted into the space formed by the wall portion 4tf, the connection portion of the first tubular member, and the connecting portion of the first tubular member, and A pressure metal plate is placed on the preform body 7, and a pressure molding machine (not shown) is used to press the pressure metal plate 5. As a result, the preform body fluidizes and the first and first The gap L formed by the tubular member/'λ' is filled, and a part of it is placed on the first tubular member 1'.
-11 is configured.

この場合の状態が第一図Ｙに示しである。The situation in this case is shown in FIG.

このようにして成形が完了すると、成形品を所定温度に
冷却し、次いで成形製を分解して成形品を取り出し、こ
の成形品を機檎加工により、第１図ＸＫ示すように外周
絶縁物３−コ及び内周絶縁物３−３を露出させ、接続部
ｌ−ダを設けた製品に仕上げられる。なお、この接続部
／−ｌは、ねじあるいは溶接等により容器壁あるいは金
属管に接続される。When the molding is completed in this way, the molded product is cooled to a predetermined temperature, and then the molded product is disassembled and the molded product is taken out. The product is finished with the connection part L-da exposed and the inner circumferential insulator 3-3 exposed. Note that this connection part /-l is connected to the container wall or metal pipe by screws, welding, or the like.

このようＫして製造された絶縁管継手は、気密特性、冷
熱及び機械的債撃強度、引張り荷重強度に関しては、完
全にこれを保持するが、電気絶縁特性中、沿面絶縁特性
、特に、内周部の特性が低く、構造、機械的な不可避の
理由により、これを改良し得ないという極めて重大な致
命的な欠陥がある。また、この傾向は製品形状が大きく
なるにつれ、％に顕著となるものである。Insulated pipe joints manufactured in this way completely maintain airtightness, cold and mechanical impact strength, and tensile load strength, but among electrical insulation properties, creepage insulation properties, especially internal There is a very serious fatal defect in that the characteristics of the peripheral portion are poor and cannot be improved due to unavoidable structural and mechanical reasons. Moreover, this tendency becomes more noticeable as the product shape becomes larger.

以下、その理由につい【説明する。The reason for this will be explained below.

この絶縁管継手の金具類の材質は、成形上の理由により
、約１００℃の温度に加熱され、この状態でｉｓ〜３ト
ンの加圧を受けて成形されるために、この条件下で所定
の機械的強度を保持する必要があり、従って、自ずと使
用材料は限定され、鉄及びその合金やステンレス鋼等に
なる。しかるに、鉄の熱膨張率はｌ／×ＩＯ−′、ステ
ンレス鋼のそれは１ｔｘｉｏ−’　　程度である。一方
、電気絶縁物であるガラス・マイカ塑造体の熱膨張率は
ｇ〜９Ｘ１０　’である。このガラス・マイカ塑造体と
なる予備成形体は、一般に７３０−　＆θ０℃に加熱さ
れるが、これは加圧成形時の流動性を良好にするために
必要な条件である。また天然マイカはこの温度に加熱す
ると分解するために、必然的に熱分解しない合成マイカ
が使用され、実際には、合成含ヰ素金マイカが使−用さ
れ、このマイカの熱膨張率はｔ　Ｘ　１０−’である。For molding reasons, the material of the metal fittings of this insulated pipe joint is heated to a temperature of approximately 100°C and is molded under a pressure of ~3 tons in this state. Therefore, the materials that can be used are naturally limited to iron and its alloys, stainless steel, etc. However, the coefficient of thermal expansion of iron is l/xIO-', and that of stainless steel is about 1txio-'. On the other hand, the coefficient of thermal expansion of the glass-mica plastic body, which is an electrical insulator, is g~9X10'. The preformed body that becomes the glass-mica plastic body is generally heated to 730° C. and θ0° C., which is a necessary condition for improving fluidity during pressure molding. Furthermore, since natural mica decomposes when heated to this temperature, synthetic mica that does not decompose is inevitably used.In reality, synthetic mica containing gold mica is used, and the coefficient of thermal expansion of this mica is t. X 10-'.

一方、ガラス質の熱膨張率は、軟化溶融温度、電気絶縁
特性及び耐食性勢必須具備特性面からの制約により、ｇ
−ｉｏｘｉｏ’のものが使用され、これより大きい熱１
１脹率のものは使用不可能である。そのため必然的に上
記の膨張率になる。On the other hand, the coefficient of thermal expansion of glass is limited by the softening and melting temperature, electrical insulation properties, and corrosion resistance properties.
-ioxio' is used, and the heat greater than 1
Those with a inflation rate of 1 cannot be used. Therefore, the above expansion rate is inevitably achieved.

また、製品の内周の沿面絶縁特性を司る内周絶縁物３−
３は、上記の熱膨張率の差により、成形品は常温におい
て、矢印９−１．９−コＩｔＣ示スような軸方向に、ま
た、矢印ＩＯにより示す内周方向の中心部に必然的に圧
縮力を受ける。この内周絶縁物３−３が受ける単位あ五
りの圧縮力は、長さが長くなる機軸方向に１また、直径
が大きくなる程円周方向に増加するようＫなる。しかし
ながら、成形品の状態では、金具によつ【、この内周絶
縁物３−３は包囲されているので、現象的には何ら異常
が見られないが、製品にするために内周部の金具を除去
すると、ガラス・マイカ塑造体として保持する圧縮強度
より、この圧縮力が大きくなることがあり、その結果、
破壊して飛散する現象、いわゆる爪飛び現象を生ずるよ
うになる。この現象は温度の上昇、下降があると顕著に
加速される。In addition, the inner periphery insulator 3- which controls the creeping insulation characteristics of the inner periphery of the product
3 is due to the above-mentioned difference in the coefficient of thermal expansion, at room temperature, the molded product inevitably expands in the center in the axial direction as shown by the arrow 9-1.9-ItC and in the inner circumferential direction as shown by the arrow IO. is subjected to compressive force. The compressive force applied to the inner peripheral insulator 3-3 is 1 in the axial direction as the length increases, and increases in the circumferential direction as the diameter increases. However, in the state of the molded product, this inner peripheral insulator 3-3 is surrounded by the metal fittings, so no abnormality is observed in terms of phenomena, but in order to make it into a product, the inner peripheral insulator 3-3 is surrounded by the metal fittings. When the metal fittings are removed, this compressive force may become greater than the compressive strength that the glass/mica plastic body retains, and as a result,
A phenomenon in which the nails break and scatter, a so-called nail-flying phenomenon, begins to occur. This phenomenon is significantly accelerated when the temperature increases or decreases.

このような理由により、内周絶縁物３−３の長さは必然
的に制約されるようＫなるために必要とする沿面絶縁特
性が確保できなくなり、また、直径の大きいものは製作
不能になって、その限度は約／θＯｗｎψに抑えられる
。For these reasons, the length of the inner circumferential insulator 3-3 is inevitably limited, making it impossible to secure the necessary creeping insulation properties, and making it impossible to manufacture one with a large diameter. Therefore, the limit is suppressed to about /θOwnψ.

本発明は、このような従来品の致命的な欠陥である沿面
絶縁特性及び形状の大きさについての制約を完全に除去
し、直径の大ささの制約がな（、且つ必要な沿面絶縁特
性を保持する絶縁管継手を提供することを、その目的と
するものである。The present invention completely eliminates the limitations on creeping insulation properties and shape size, which are the fatal flaws of conventional products, and eliminates the constraints on diameter size (and has the necessary creeping insulation properties). Its purpose is to provide an insulating pipe joint that retains its properties.

本発明は、この目的を達成するために、内部側に設けら
れる第１管状部材と、外部［Ｋ設けられる第コ管状部材
と、第１及び第一管状部材間に介在して第７．第コ管状
部材を相互に絶縁する電気絶縁物とから構成される絶縁
管継手において、第７管状部材は一端部に接続部を有す
ると共に中間部に外径側へ夾品した鍔部が形成されてお
り、第コ管状部材は、その内径が第１管状部材との間に
電気絶縁物が充填される間隙部を有するように形成され
ると共に、その長さが、上記一端部側において上記鍔部
をはさむ電気絶縁物の上記一端側を越えて所望長さに延
長され、他端側において上記鍔部をはさむ電気絶縁物の
上記他端側端部と同一面になるように形成されており、
電気絶縁物は第１管状部材の上記接続部近辺から第１．
第コ管状部材にはさまれる部分を経て他端にまで連結し
て構成されており、更に、第コ管状部材の上記他端部に
は所定長さの接続具が上記電気絶縁物と離隔して気密に
取り付けられていることを特徴とするものである。In order to achieve this object, the present invention provides a first tubular member provided on the inside, a second tubular member provided on the outside, and a seventh tubular member interposed between the first and first tubular members. In an insulated pipe joint composed of a seventh tubular member and an electrical insulator that insulates the seventh tubular member from each other, the seventh tubular member has a connecting portion at one end and a flange extending toward the outer diameter side in the middle portion. The inner diameter of the first tubular member is formed such that it has a gap between it and the first tubular member, which is filled with an electrical insulator, and the length of the first tubular member is equal to the flange on the one end side. The flange is extended to a desired length beyond the one end of the electrical insulator sandwiching the flange, and the other end is formed to be flush with the other end of the electrical insulator sandwiching the flange. ,
The electrical insulator extends from the vicinity of the connection portion of the first tubular member to the first.
The second co-tubular member is connected to the other end through a portion sandwiched by the second co-tubular member, and furthermore, a connector of a predetermined length is connected to the other end of the second co-tubular member and is spaced apart from the electrical insulator. It is characterized by being airtightly installed.

以下、本発明になる絶縁管継手をその一実施例を示す添
付図向第３図及び第ダ図に基づいて説明する。なお、第
３図又は成形完了品の構造を、また、第３図Ｙはこの成
形完成品に機械加工を施して仕上げられた製品の構造を
それぞれ示す縦断面図であり、また、第ダ図Ｘは成形の
ための加圧前の状態を、第ｑ図Ｙは加圧終了時の状態を
それぞ図において上端部に接続部コ／−／を筒体２／−
一に連続して設けられると共に筒体コ／−２の中間部に
外径側に突出した鍔部コ／−３が設けられ且つ鍔部λ／
−３の下部に支持台コ／−タが設けられた第１管状部材
、符号ココは、第１管状部材２／の鍔部コ／−３を囲繞
するか、又は、下方を開放して囲繞する溝部−２御／を
、内径側に、第１．第２管状部材、２１．ココ関に介在
して両管状部材２／、コλを絶縁する電気絶縁物２３−
７が形成される間隙部コダーｌを有するように形成し、
その長さは、図において上端側が上記鍔部コ／−３をは
さむ電気絶縁物コ３−コの上端を越えて所要長さに延長
され、また、下端側が同じく上記鍔部２／−３をはさむ
電気絶縁物２３−３の下端面と同一面になるか、又は、
これから若干下方に延長するように形成された第コ管状
部材であり、電気絶縁物コ３は電気絶縁物２３−２．コ
３−３に連続して、上部は第１管状部材ぞれ、延長して
電気絶縁物λ３−４Ｉ及びコ３−５が構成されており、
また、当然に鍔部２１−３と第コ管状部分２−との間に
も電気絶縁物コ、ｙ−ｉが連続して介在している。また
、第コ管状部材ココの外周下部には、例えば、ねじコｓ
−ｉによるら着及び溶接２Ｓ−λ等の内少なくともいず
れか一方により接続具コロが電気絶縁物２３−５と離隔
すると共に気密に取り付けられており、また、接続具２
乙の下端は第１管状部材２ノの内径と同一径の内径を有
する穴λ／、−／が形成されていケ。DESCRIPTION OF THE PREFERRED EMBODIMENTS The insulating pipe joint according to the present invention will be described below with reference to the accompanying drawings 3 and 3 showing one embodiment thereof. In addition, FIG. 3 or Y is a vertical cross-sectional view showing the structure of a completed molded product, and FIG. In each figure, X shows the state before pressurization for molding, and Fig. q Y shows the state after the end of pressurization.
A flange λ/-3 is provided continuously on the cylindrical body λ/-2, and a flange λ/-3 protruding toward the outer diameter side is provided at the middle part of the cylindrical body Λ/-2.
The first tubular member with a support base provided at the lower part of the first tubular member 2/-3, or the first tubular member 2/-3, surrounds the flange part 2/-3, or surrounds it with the lower part open. The first groove part-2 is placed on the inner diameter side. second tubular member, 21. An electrical insulator 23- which is interposed between the two tubular members 2/ and λ and insulates the two tubular members 2/
7 is formed to have a gap Kodar l,
As shown in the figure, its upper end extends to the required length beyond the upper end of the electrical insulating member 3-3 that sandwiches the flange 2/-3, and the lower end extends beyond the flange 2/-3. be on the same plane as the lower end surface of the electrical insulator 23-3 to be sandwiched, or
The electrical insulator 3 is a tubular member formed to extend slightly downward from the electrical insulator 23-2. Continuing from A3-3, the upper part of the first tubular member is extended to form electrical insulators λ3-4I and K3-5,
Furthermore, as a matter of course, an electrical insulator y-i is continuously interposed between the flange portion 21-3 and the second tubular portion 2-. In addition, at the lower part of the outer periphery of the third tubular member, for example, a screw
-i, the connecting tool roller is separated from the electrical insulator 23-5 by at least one of welding 2S-λ, etc., and is attached airtightly, and the connecting tool 2
Holes λ/, -/ having the same inner diameter as the inner diameter of the first tubular member 2 are formed at the lower end of the first tubular member 2.

なお、上記の第１及び第λ管状部材２／、λ−は、いず
れも従来品と同様に、１００℃程度の加熱条件下で所定
の機械的強度を保持するものであればよ訃 く、鉄、ステンレス鋼等ゆ好適に使用される。It should be noted that the first and λ-th tubular members 2/ and λ- described above are suitable as long as they maintain a predetermined mechanical strength under heating conditions of about 100°C, similar to conventional products. Iron, stainless steel, etc. are preferably used.

本発明品は上記のように構成されるが、次にその成形に
ついて第参図により説明する。なお、成形においては、
接続具コロが未着の状態において成形され、第１及び第
コ管状部材−７，ココは、第１管状部材の内径に加工用
取代な必要に応じて付する程度で、他部分はそのまま使
用される。The product of the present invention is constructed as described above, and its molding will now be explained with reference to the drawings. In addition, in molding,
The connector rollers are molded without being attached, and the first and second tubular members 7 and 7 are only attached to the inner diameter of the first tubular member as machining allowances as necessary, and the other parts are used as they are. be done.

また、成形型としては、第コ管状部材２コの外径と同一
外径を有し、第１管状部材−７の筒体コｌ−一の外径と
の間に、その間に介在する電気絶縁物２３−ダな形成す
るに必要な所定の間隙部２ｑ−ダを有するよ５に内径が
形成され、且つ、上端が内向き傾斜面λ７−／を有する
ところの電気絶縁物２３−９を形成するに必要な長さを
有する円周方向に分割可能の補助壁部コアと、第コ管状
部材ココの下端面を上面において支承すると共に電気絶
縁物コ３−３を形成するに必要な間隙部２ｑ−３を鍔部
コ／−３との間に保持するように第１管状部材２／の下
端面を支承する段部２１１−／が形成され、且つ、第７
管状部材コｌの下部の支持合一／−ダとの間に電気絶縁
物コＪ−，ｔを構成するに必要な間隙部評−５を有して
いる分割構造の支持金２ｇと、従来品の成形において使
用されたものと同様の壁部ダ、枠よ及び加圧金Ｓとから
構成されている。In addition, the mold has the same outer diameter as the outer diameter of the second tubular member 2, and the outer diameter of the cylindrical member 1 of the first tubular member 7, and the electric current interposed therebetween. An electrical insulator 23-9 is formed in which the inner diameter is formed to have a predetermined gap 2q-d necessary for forming the insulator 23-d, and the upper end has an inwardly inclined surface λ7-/. an auxiliary wall core that is divisible in the circumferential direction and has the necessary length to support the lower end surface of the second tubular member on the upper surface, and a gap necessary to form the electrical insulator 3-3. A stepped portion 211-/ is formed to support the lower end surface of the first tubular member 2/ so as to hold the portion 2q-3 between the collar portion Ko/-3, and the seventh
A supporting member 2g having a split structure and having a gap 5 necessary to form an electrical insulator J-, t between the lower support member 2g of the tubular member 1 and the conventional It consists of a wall part, a frame part, and a pressurizing part S similar to those used in molding the product.

また、原料は従来と同様、ガラス質粉末とマイカの粉末
と０混合粉末を円筒体に成形した予備成形体７を使用す
る。Further, as the raw material, a preformed body 7 formed into a cylindrical body from a glassy powder, mica powder, and zero mixed powder is used, as in the conventional case.

このように構成された各部材により本発明の絶縁管継手
を成形するには、成形型中、壁部ダ、枠Ｓ、及び支持金
−ｌは組み立て、また、補助壁部コアと加圧金Ｓとは組
み立てることなく別個に、それぞれ所定温度に、更に、
第１及び第コ管状部材λｌ、ココ及び予備成形体７もそ
れぞれ、所定温度に加熱する。In order to mold the insulating pipe joint of the present invention using each member configured in this way, the wall portion DA, frame S, and support metal l are assembled in the mold, and the auxiliary wall portion core and the pressure metal are assembled. S separately without assembly, each at a predetermined temperature, and further,
The first and second tubular members λl, and the preformed body 7 are also heated to a predetermined temperature, respectively.

次いで、加熱が完了すると、先ず組み立てられた成形製
の支持金−ｇ上に第１管状部材コｌを挿填し、次に第−
管状部材一一を同じく支持金コｌ上に挿填する。次いで
、補助壁部２７を第コ管状部材コｌ上に、引き続き、予
備成形体りを補助壁部λり上帆載置する。この場合の状
態が、第ダ図Ｘに示しである。Next, when heating is completed, the first tubular member 1 is inserted onto the assembled molded support g, and then the first tubular member 1 is inserted onto the assembled molded support g.
Similarly, the tubular member 11 is inserted onto the support metal 1. Next, the auxiliary wall portion 27 is placed on the second tubular member 1, and the preform is subsequently placed on the auxiliary wall portion λ. The situation in this case is shown in FIG.

次に加圧金ｇを予備成形体？上に載置し、加圧成形機（
図示せず）により、加圧金ざを加圧する。Next, the pressurized gold g is preformed? Place it on the pressure molding machine (
(not shown) to pressurize the pressurizing ring.

予備成形体７は、この加圧により流動して、第１管状部
材２１と、第コ管状部材２２、補助壁部２７及び支持金
とによって構成される間隙部２ダー７〜コ４Ｌ−３を充
填し、その一部は補助壁部コアの上部の傾斜面コアー７
上に残り、電気絶縁物コ３、すなわちコ３−／〜コ３−
５を構成する。この場合の状態が第ダ図Ｙに示しである
。The preform 7 flows due to this pressurization, and fills the gaps 2 7 to 4 L-3 formed by the first tubular member 21, the first tubular member 22, the auxiliary wall 27, and the support metal. A part of it is filled with the slope core 7 on the upper part of the auxiliary wall core.
The remaining electrical insulator Co3, i.e. Co3-/~ Co3-
5. The situation in this case is shown in FIG. Y.

このようＫしや成形が完了すると、成形品を所定温度に
まで冷却し、次いで成形型を分解して成形品を取り出す
が、補助壁部２７は分割構造であり、且つ上部が傾斜面
２７−７になっているために、容易に分解除去すること
が可能である。このような成形品が第３図Ｘに示しであ
る。また第１及び第コ管状部材λｌ、−−間の間隙部コ
ダーｌ〜コ亭−３に充填された電気絶縁物コ３−／〜λ
３−３は、第コ管状部材ココにより圧縮されており、第
１管状部材２１を確実に固定している。また、第コ管状
部材−一の両端の第１管状部材２／の外周面に構成され
た絶縁物２．７−４１　、２１−１は成形特外周面に分
割構造で移動自由な成形型である補助壁部２７及また、
内Ｊ１１面も第１管状部材Ｊ／の熱膨張率が大きいため
、何らの異常圧力が残存しておらず、極いので、沿面絶
縁特性を保持するに必要な長さの成形品を製造すること
が可能であり、また、円周方向にも何らの異常圧力が残
存しないために、直径が大きくなっても何らの影響を受
けず、従つ【、大きな直径の製品の製造が可能である。When the molding is completed, the molded product is cooled to a predetermined temperature, and then the mold is disassembled to take out the molded product. 7, it can be easily decomposed and removed. Such a molded article is shown in FIG. 3X. In addition, the electrical insulators 3-/--3 filled in the gaps between the first and second tubular members λ1--3
3-3 is compressed by the first tubular member 21, and securely fixes the first tubular member 21. Furthermore, the insulators 2.7-41 and 21-1 formed on the outer circumferential surface of the first tubular member 2 at both ends of the first tubular member 2/1 are molded with a freely movable molding structure with a split structure on the outer circumferential surface. A certain auxiliary wall part 27 and also,
Since the coefficient of thermal expansion of the first tubular member J/ is large on the inner J11 surface, no abnormal pressure remains and is extremely strong, so a molded product with the length necessary to maintain creeping insulation properties is manufactured. In addition, since no abnormal pressure remains in the circumferential direction, there is no effect even if the diameter increases, and therefore it is possible to manufacture products with large diameters. .

このよう忙、本発明では、上記成形品、すなわち、第λ
管状部材−一の両端ＫＭ／管状部材−／の外周面にある
渋面絶縁部とな゛る電気絶縁物コ３−ダ、λ３−５を内
周及び外周面の６却絶縁特性保持部分として構成してい
るために、第３図Ｙに示すよ針に、接続具λ６を第コ管
状部材コニに接続することができ、この接続は機械的強
度と気密特性とを維持すればよく、従って、ねじ部コ５
−／及び溶接コＳ−一の何れでもよく、また、併用でも
一向に差し支えない。また接続具２乙の先端には、ｔａ
／管状部材コｌの内径と同一径の内径を有する穴２６−
１が形成された接続部分が設けてあり、従って、従来の
構造品と全く同様に容器壁あるいは金属管に接続するこ
とが可能である。In this invention, the above-mentioned molded product, that is, the λth
The electrical insulator coder 3-5, which serves as an insulating part on the outer circumferential surface of the tubular member, is configured as a part on the inner and outer circumferential surfaces that retains insulation properties. As shown in FIG. Thread part 5
-/ and welding part S-1, and there is no problem in using them together. In addition, there is a ta at the tip of connector 2B.
/ Hole 26- having the same inner diameter as the inner diameter of the tubular member 1
1 is provided, so that it is possible to connect to a container wall or to a metal tube in exactly the same way as with conventional constructions.

本発明になる絶縁管継手は、従来の方法で製造した小形
形状品が保持する良好な気密特性を保持し、％に急激な
温度の上昇、下降の反復にあっても、気゛ｖＭ％性が低
下することなく、冷熱及び機械的衡撃強度も大きく、機
械的強度、特に、引張り荷重強度については両管状部材
間に対面部が設定されており、機械計算により必要強度
を保持させることが可能であり、その結果、経年変化が
なく長期信頼性を有するなど、全特性を完全に具備する
と共Ｋ、従来の絶縁管継手では確保し得なかった沿面絶
縁特性についても、必要な長さの泪面絶径の大きさに就
いての制約は完全に除去されて必要な大きさの絶縁管継
手が製造できるという顕著な効果を有している。加うる
に、金具構造が極めて単純になり、しかも、成形品の機
械加工も大幅に軽減され、必然的に製造費用も低下し、
安価に製品を提供し得るようになり、その技術的及び実
用的効果は極めて大きいものである。The insulated pipe joint of the present invention maintains the good airtightness of small-shaped products manufactured by conventional methods, and has good airtightness even when subjected to repeated rapid temperature rises and falls. There is no decrease in thermal and mechanical shock strength, and the mechanical strength, especially the tensile load strength, is determined by the facing part between both tubular members, and it is possible to maintain the necessary strength through mechanical calculations. As a result, it not only has all the characteristics such as no deterioration over time and long-term reliability, but also the creepage insulation properties that could not be achieved with conventional insulated pipe joints. This has the remarkable effect that the restriction on the size of the absolute diameter of the pipe is completely removed, and an insulated pipe joint of the required size can be manufactured. In addition, the structure of the metal fittings has become extremely simple, and the machining of molded parts has been greatly reduced, which naturally reduces manufacturing costs.
It has become possible to provide products at low cost, and its technical and practical effects are extremely large.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、従来の絶縁管継手の縦断面図であって、第１
図Ｘは製品の構造を、また、第１図Ｙは成形品の構造を
示す縦断面図、第２図は従来の絶縁管継手の製造方法を
示す縦断面図であって、第コ図Ｘは加圧成形直前の状態
を、また、第コ図Ｙは加圧成形完了後の状態を示す縦断
面図、第３図は本発明になる絶縁管継手の一実施例を示
す縦断面図であって、第３図Ｘは成珍完了品の構造を、
また、第３図Ｙは製品の構造を示す縦断面図、第９図は
本発明になる絶縁管継手の製造方法の一例を示す縦断面
図であって、第ダ図Ｘは加圧成形直前の状態を、また、
第ダ図Ｙは加圧成形完了後の状態を示す縦断面図である
。 図中、参・・壁部、３・・枠、７・・予備成形体、ｔ・
・加圧金、コト・第１管状部材、２コ・・第コ管状部材
、コ３・・電気絶縁体、コク・・間隙部、コ！−ｌ・・
ねじ部、λよ−コ・・接合部、コロ・・接続具、コク・
・補助壁部、２ｇ・・支持金。 なお、各図中、同一符号は同一また＆ｉ相当部分を示す
。 代理人　　葛　　野　　信　　− 党１図 ９Ｐ）２図 Ｙ 手続補正書（自発） 昭和　５７．９月２１日 １、事件の表示　　　　特願昭　Ｉ？−１０４２１勺２
、発明の名称　　　１１１１手 ３、補正をする者 事件との関係　　　特許出願人 住　所　　　　　東京都千代田区丸の内二丁目２番３号
名　称（６０１）　　　三菱電機株式会社代表者片山仁
八部 ４、代理人 （１）　　明１ａ畳の発明の詳細な説明の一部）　　図
　　面 ４　補正の自答 ム　本纏明ｍｖの記載の一部を次のとおり補正する。 （１）ｍ４ペ一ジ第λθ行「支持部ｓＪを「支持部戸−
５」と補正する。 １２）　　第７ページ第１ツ〜／１行「変形を支承する
」を「変形を支持する」と補正する。 ＋（資）　第１０ベージ第１Ｊ行「１．Ｓ〜３トン」を
「／、ｊ　−Ｊ””／　ａｍ’　Ｊ　色補正スルａＢ　
図面第１図の符号−一部の引出し線を別紙図面写に示す
とおり補正する。FIG. 1 is a vertical cross-sectional view of a conventional insulated pipe joint, showing the first
Fig. 3 is a vertical sectional view showing the state immediately before pressure forming, FIG. 3 is a vertical sectional view showing the state after pressure forming is completed, and FIG. Therefore, Figure 3
In addition, Fig. 3 Y is a longitudinal cross-sectional view showing the structure of the product, Fig. 9 is a longitudinal cross-sectional view showing an example of the manufacturing method of the insulated pipe joint according to the present invention, and Fig. Also, the state of
FIG. Y is a vertical sectional view showing the state after pressure molding is completed. In the figure, 3. Wall part, 3. Frame, 7. Preformed body, t.
- Pressurized metal, 1st tubular member, 2nd tubular member, 3rd electrical insulator, body... gap, ko! -l...
Threaded part, λ side...joint part, roller...connecting tool, body...
・Auxiliary wall part, 2g...support metal. In each figure, the same reference numerals indicate the same parts or the parts corresponding to &i. Agent Makoto Kuzuno - Party 1 Figure 9P) 2 Figure Y Procedural amendment (voluntary) Showa 57.September 21, 1, Indication of case Special application Showa I? -10421勺2
, Title of the invention 1111-3, Relationship with the person making the amendment Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 4, Agent Person (1) Part of the detailed explanation of the invention of Mei 1a tatami) Drawing 4 Self-answer for amendment A part of the description in the main summary Mv is amended as follows. (1) m4 page 1st line λθ "Support part sJ"
5”. 12) In the 7th page, 1st to 1st line, "Support deformation" is corrected to "Support deformation." + (fund) 10th page, 1st J line "1.S~3 tons" to "/, j -J""/ am' J Color correction aB
The symbols in Figure 1 of the drawings - some of the leader lines will be corrected as shown in the attached drawing copy.

Claims (1)

【特許請求の範囲】 （１）内部側一般けられる第１管状部材と、外部側に設
は名にる第コ管状部材と、第７及び第２管状部材間に介
在して第１．第コ管状部材を相互に絶縁する電気絶縁物
とから構成される絶縁管継手において、第１管状部材は
一端部に接続部を有すると共に中間部に外径側へ突出し
た鍔部が形成されており、第コ管状部材は、その内径が
第７管状部材との間に電気絶縁物が充填される間隙部を
有するように形成されると共に、その長さが、上記一端
部側において上記鍔部なはさむ電気絶縁物の上記一端部
を越えて所望長さに延長され、他端側において上記鍔部
をはさむ電気、絶縁物の上記他端側端部と同一面になる
ように形成されており、電気絶縁物は、第１管状部材の
上記接続部近辺から第１．第コ管状部材にはさまれる部
分を経て他端にまで連結して構成されており、更に、第
コ管状部材の上記他端部には所定長さの接続具が上記電
気絶縁物と離隔して気密に取り付けられていることを特
徴とする絶縁管継手。 （コ）接続具の電気絶縁物と離隔して気密に取り付けら
れる第コ管状部材への取付けが、第コ管状部材の外周部
へのら着及び接合の少なくともいずれかによる取付けで
ある特許請求の範囲第７項記載の絶縁管継手。 （３）接続具の先端部内径が、第１管状部材の内径と同
径に形成されている特許請求の範囲第１項又は第２項記
載の絶縁管継手。 （り）　　電気絶縁物が、ガラス質およびマイカの粉末
を混合ｆＩＩＩして構成されたガラス・マイカ塑造体で
ある特許請求の範囲第１項ないし第３項のいずれかに記
載の絶縁管継手。Scope of Claims: (1) A first tubular member disposed on the inner side, a second tubular member disposed on the outer side, and a first tubular member disposed between the seventh and second tubular members. In an insulated pipe joint comprising a first tubular member and an electrical insulator that insulates the first tubular member from each other, the first tubular member has a connecting portion at one end and a flange protruding toward the outer diameter side at an intermediate portion. The inner diameter of the seventh tubular member is formed to have a gap filled with an electrical insulator between the inner diameter and the seventh tubular member, and the length thereof is equal to the flange portion on the one end side. The flange is extended to a desired length beyond the one end of the electrical insulator sandwiching the flange, and the other end is formed to be flush with the other end of the electrical insulator sandwiching the flange. , the electrical insulating material extends from the vicinity of the connection portion of the first tubular member to the first. The second co-tubular member is connected to the other end through a portion sandwiched by the second co-tubular member, and furthermore, a connector of a predetermined length is connected to the other end of the second co-tubular member and is spaced apart from the electrical insulator. An insulated pipe joint characterized by being airtightly installed. (g) The attachment of the connecting device to the first tubular member, which is airtightly attached to the electrical insulator, is by at least one of attaching and joining to the outer circumference of the first tubular member. Insulated pipe fittings according to scope 7. (3) The insulated pipe joint according to claim 1 or 2, wherein the inner diameter of the tip end of the connector is the same as the inner diameter of the first tubular member. (i) The insulating pipe joint according to any one of claims 1 to 3, wherein the electrical insulator is a glass-mica plastic body formed by mixing vitreous and mica powders.