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JP4260356B2 - Electric fusion saddle joint - Google Patents
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JP4260356B2 - Electric fusion saddle joint - Google Patents

Electric fusion saddle joint Download PDF

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Publication number
JP4260356B2
JP4260356B2 JP2000364417A JP2000364417A JP4260356B2 JP 4260356 B2 JP4260356 B2 JP 4260356B2 JP 2000364417 A JP2000364417 A JP 2000364417A JP 2000364417 A JP2000364417 A JP 2000364417A JP 4260356 B2 JP4260356 B2 JP 4260356B2
Authority
JP
Japan
Prior art keywords
saddle
fusion
heating wire
spigot
indicator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2000364417A
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Japanese (ja)
Other versions
JP2002168390A (en
Inventor
雅也 岩崎
宏明 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Chemicals Industrial Products Ltd
Original Assignee
Mitsui Chemicals Industrial Products Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP2000364417A priority Critical patent/JP4260356B2/en
Publication of JP2002168390A publication Critical patent/JP2002168390A/en
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/97—Checking completion of joining or correct joining by using indications on at least one of the joined parts
    • B29C66/976—Checking completion of joining or correct joining by using indications on at least one of the joined parts by the use of an indicator pin, e.g. being integral with one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【０００１】
【発明が属する技術分野】
本発明は、サドル部を備えたサドル継手やサービスチー継手など、本管に枝管を接続するのに用いる熱可塑性樹脂製の電気融着サドル系継手に関する。
【０００２】
【従来技術】
図１及び図２は、この種サドル系継手のうちのサービスチー継手の一例を示すもので、両端に鍔１ａを側方に突設したサドル部１と、サドル部１上に突設される胴部２と、胴部２より側方に突設されるスピゴット３よりなり、本管４に接合するサドル部座面には、電熱線５を渦巻状に埋設したマット６が取付けられている。図中、７は融着時に融着界面での樹脂の圧力によって上昇するインジケータで、このインジケータが突き出ることにより融着が正常に行われたことを確認できるようになっている。
【０００３】
本管４に上述するサービスチー継手８を電気融着するときには、サドル部座面を本管４に当て、図示しないクランプ工具を用いて鍔１ａに掛け、本管４を抱き締めた状態でクランプしてから通電していた。
【０００４】
【発明が解決しようとする課題】
サドル系継手では、接続される枝管の径が大きく、サドル部より立ち上がる胴部やスピゴットの径が大きくなると、電熱線を埋設したサドル部座面の環状融着部の径も大きくならざるを得ないが、融着部の径が大きくなり、その外周部が本管の軸心を通る平面より下向きに突出するまで伸びると、クランプ用工具を両側の鍔に掛け、サドル部を本管にクランプしたとき、両側の鍔が図１の矢印方向に平行に引張られることにより、融着部外周が本管より浮いて密着性が損なわれ易くなる。
【０００５】
一方、逆に融着面積を必要最小限にし、融着部の外周を小さくすると、融着部が胴部又はスピゴット下に位置してインジケータを設置できないか、設置できたとしても融着界面での内圧を充分に表わすことのできる位置には設けることができなくなる。
【０００６】
本発明は、融着部の外径を必要以上に大きくしないでも、インジケータを融着界面での内圧を充分に表わすことができる位置に設けることができるようにした電気融着サドル系継手を提供することを目的とする。
【０００７】
【課題の解決手段】
請求項１に係わる発明は、サドル部と、サドル部上に突設される胴部又はスピゴットと、サドル部の両側に側方に突設されるクランプ用の鍔と、融着時の融着界面での樹脂の圧力によって上昇するインジケータを有し、サドル部座面に電熱線を渦巻状に埋設したマットを取付けて環状の融着部を形成した熱可塑性樹脂製の電気融着サドル系継手において、上記マットをサドル部座面に融着部を形成する内周側の電熱線が上記胴部又はスピゴットに通したホールソーで穿孔される孔内に出ない程度に管軸方向にずらして取付け、上記インジケータを上記孔中心より最も離れた融着部上に設けたことを特徴とする。
【０００８】
本発明によると、融着部を軸方向にずらして設けたことにより、孔中心より最も離れた箇所が胴部又はスピゴットよりはみ出すか、はみ出し量が大きくなり、インジケータの設置が可能ないし容易となる。
【００１０】
請求項２に係わる発明は、サドル部と、サドル部上に突設される胴部又はスピゴットと、サドル部の両側に側方に突設されるクランプ用の鍔と、融着時の融着界面での樹脂の圧力によって上昇するインジケータを有し、サドル部座面には電熱線が渦巻状に埋設される熱可塑性樹脂製の電気融着サドル系継手において、上記インジケータを融着部上より斜め外向きに傾斜させたことを特徴とする。
【００１１】
本発明によると、融着部が胴部又はスピゴット下に位置し、はみ出していなくてもインジケータ上端を胴部又はスピゴットより離れた箇所に設けることができる。
【００１２】
【発明の実施の形態】
図３に示すサービスチー継手１１は、図２に示すサービスチー継手８において、電熱線５を渦巻状に埋設したマット６を内周側の電熱線５が胴部２の孔９内に出ない程度に管軸方向にずらして取付け、インジケータ７を孔中心より最も離れた融着部上に設けたものである。
【００１３】
図４に示すサービスチー継手１２は、図示省略したホールソーが捩込まれる胴部１３の孔下端に内側に突出する環状の突部１４を形成して孔径よりも穿孔径を小さくし、突部１４に電熱線１５を配設したものである。
本実施形態によると、突部１４により電熱線１５が埋設されるマットをずらす量、すなわち取付けられるマットの偏心量を多くすることができる。
【００１４】
上記実施形態では、マットに渦巻状に埋設される電熱線が円形状をなしているが、別の実施形態では、楕円状をなし、長径が管軸方向を向くようにマットがサドル部座面に取付けられる。
【００１５】
図５に示すサービスチー継手１６は、図２に示すサービスチー継手８において、インジケータ１７を電熱線が埋込まれる融着部１８より斜め外向き、すなわち径方向外方に傾斜させて設けたものである。
上記各実施形態は、いずれもサービスチー継手に適用した例を示すが、サドル継手に対しても同様に適用することができる。
【００１６】
【発明の効果】
請求項１に係わる発明によると、電熱線が埋込まれる環状の融着部を必要以上に大きくしなければ、胴部又はスピゴットより側方にはみ出させることができない場合であっても、本発明により胴部又はスピゴットを側方にはみ出させることが可能となり、インジケータをはみ出し部分の融着界面での内圧を充分に表わすことができる箇所に設けることができる。
【００１７】
請求項２に係わる発明によると、電熱線が埋込まれる環状の融着部を必要以上に大きくしないと、胴部又はスピゴット側方にはみ出させることができない場合であっても、インジケータを充分な肉厚を表わす位置に取付けることができる。
【図面の簡単な説明】
【図１】本管に取り付けたサービスチー継手の側面図。
【図２】図１に示すサービスチー継手の縦断面雨。
【図３】本発明に係わるサービスチー継手の縦断面図。
【図４】本発明に係わるサービスチー継手の要部の断面図。
【図５】本発明に係わるサービスチー継手の別の例の縦断面図。
【符号の説明】
１・・サドル部
１ａ・・鍔
２、１３・・胴部
３・・スピゴット
４・・本管
５、１５・・電熱線
６・・マット
７、１７・・インジケータ
８、１１、１２、１６・・サービスチー継手
９・・孔
１４・・突部
１８・・融着部[0001]
[Technical field to which the invention belongs]
The present invention relates to an electric fusion saddle-type joint made of a thermoplastic resin used for connecting a branch pipe to a main pipe, such as a saddle joint having a saddle portion or a service tee joint.
[0002]
[Prior art]
FIG. 1 and FIG. 2 show an example of a service tee joint of this kind of saddle type joint, and a saddle part 1 having a flange 1a projecting laterally at both ends and projecting on the saddle part 1 are shown. A mat 6 in which a heating wire 5 is embedded in a spiral shape is attached to a seat surface of a saddle portion which is composed of a trunk portion 2 and a spigot 3 projecting laterally from the trunk portion 2 and joined to the main pipe 4. . In the figure, 7 is an indicator that rises due to the pressure of the resin at the fusion interface at the time of fusion, and it can be confirmed that the fusion has been performed normally by protruding this indicator.
[0003]
When the service tee joint 8 described above is electrically welded to the main pipe 4, the seat surface of the saddle portion is applied to the main pipe 4, is hung on the flange 1 a using a clamping tool (not shown), and is clamped with the main pipe 4 being hugged I was energized after that.
[0004]
[Problems to be solved by the invention]
In saddle joints, when the diameter of the branch pipe to be connected is large and the diameter of the trunk or spigot rising from the saddle increases, the diameter of the annular fused portion of the seat surface of the saddle embedded with the heating wire must also increase. If the diameter of the fused part increases and the outer circumference extends until it protrudes downward from the plane passing through the axis of the main pipe, the clamping tool is hung on both sides, and the saddle part is attached to the main pipe. When clamped, the hooks on both sides are pulled in parallel with the direction of the arrow in FIG.
[0005]
On the other hand, if the fusion area is minimized and the outer circumference of the fusion part is reduced, the indicator cannot be installed because the fusion part is located below the trunk or spigot. It is impossible to provide a position where the internal pressure can be sufficiently expressed.
[0006]
The present invention provides an electric fusion saddle joint that allows an indicator to be provided at a position where the internal pressure at the fusion interface can be sufficiently expressed without increasing the outer diameter of the fusion part more than necessary. The purpose is to do.
[0007]
[Means for solving problems]
The invention according to claim 1 includes a saddle portion, a body portion or a spigot projecting on the saddle portion, a clamping collar projecting laterally on both sides of the saddle portion, and fusion at the time of fusion An electric fusion saddle joint made of thermoplastic resin, which has an indicator that rises due to the pressure of the resin at the interface, and has an annular fusion part formed by attaching a mat in which a heating wire is spirally embedded on the seat surface of the saddle part In the above, the mat is attached while being shifted in the tube axis direction so that the inner heating wire that forms the fusion part on the seat surface of the saddle part does not come out in the hole drilled by the hole saw that passes through the body part or spigot. The indicator is provided on the fusion part farthest from the hole center.
[0008]
According to the present invention, by providing the fusion part shifted in the axial direction, the part farthest from the hole center protrudes from the body part or spigot, or the amount of protrusion increases, so that the indicator can be installed or facilitated. .
[0010]
The invention according to claim 2 includes a saddle portion, a body portion or a spigot projecting on the saddle portion, a clamping collar projecting laterally on both sides of the saddle portion, and fusion at the time of fusion It has an indicator that rises due to the pressure of the resin at the interface, and in the electric fusion saddle joint made of thermoplastic resin in which the heating wire is embedded spirally on the seat surface of the saddle part, the indicator is placed above the fusion part. It is characterized by being inclined obliquely outward.
[0011]
According to the present invention, the upper end of the indicator can be provided at a position away from the trunk or the spigot even if the fused part is located below the trunk or the spigot and does not protrude.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The service chef joint 11 shown in FIG. 3 is the same as the service chef joint 8 shown in FIG. 2, but the inner heating wire 5 does not go out into the hole 9 of the trunk 2 of the mat 6 in which the heating wire 5 is spirally embedded. The indicator 7 is mounted on the fusion part farthest from the hole center.
[0013]
The service tee joint 12 shown in FIG. 4 is formed with an annular protrusion 14 projecting inwardly at the lower end of the hole 13 into which a hole saw (not shown) is screwed so that the diameter of the hole is smaller than the hole diameter. The heating wire 15 is disposed on the surface.
According to this embodiment, it is possible to increase the amount by which the mat in which the heating wire 15 is embedded by the protrusion 14 is shifted, that is, the amount of eccentricity of the mat to be attached.
[0014]
In the above embodiment, the heating wire embedded in the mat in a spiral shape has a circular shape, but in another embodiment, the mat has an elliptical shape and the mat has a saddle portion seating surface so that the major axis faces the tube axis direction. Mounted on.
[0015]
The service tee joint 16 shown in FIG. 5 is the same as the service tee joint 8 shown in FIG. 2 except that the indicator 17 is inclined obliquely outward, that is, radially outward from the fusion part 18 in which the heating wire is embedded. It is.
Although each said embodiment shows the example applied to the service chi joint, all are applicable similarly to a saddle joint.
[0016]
【The invention's effect】
According to the first aspect of the present invention, even if the annular fused portion in which the heating wire is embedded is not made larger than necessary, the present invention can be applied even if it cannot be protruded laterally from the trunk portion or spigot. Thus, the body portion or spigot can be protruded laterally, and the indicator can be provided at a location where the internal pressure at the fusion interface of the protruding portion can be sufficiently expressed.
[0017]
According to the second aspect of the present invention, if the annular fused portion in which the heating wire is embedded is not made larger than necessary, the indicator can be used even if it cannot be protruded to the side of the trunk portion or spigot. It can be installed at a position that represents the wall thickness.
[Brief description of the drawings]
FIG. 1 is a side view of a service tee joint attached to a main pipe.
FIG. 2 is a longitudinal section rain of the service Qi joint shown in FIG.
FIG. 3 is a longitudinal sectional view of a service tee joint according to the present invention.
FIG. 4 is a cross-sectional view of a main part of a service Q joint according to the present invention.
FIG. 5 is a longitudinal sectional view of another example of a service Q joint according to the present invention.
[Explanation of symbols]
1 ·· Saddle part 1a ··· 鍔 2, 13 ·· Body 3 · · Spigot 4 · · Main pipes 5 and 15 · Heating wires 6 · · Mat 7, 17 · · Indicators 8, 11, 12, 16 ·・ Service tee joint 9 ・ ・ Hole 14 ・ ・ Projection 18 ・ ・ Fusion

Claims (2)

サドル部と、サドル部上に突設される胴部又はスピゴットと、サドル部の両側に側方に突設されるクランプ用の鍔と、融着時の融着界面での樹脂の圧力によって上昇するインジケータを有し、サドル部座面に電熱線を渦巻状に埋設したマットを取付けて環状の融着部を形成した熱可塑性樹脂製の電気融着サドル系継手において、上記マットをサドル部座面に融着部を形成する内周側の電熱線が上記胴部又はスピゴットに通したホールソーで穿孔される孔内に出ない程度に管軸方向にずらして取付け、上記インジケータを上記孔中心より最も離れた融着部上に設けたことを特徴とする電気融着サドル系継手。Increased by the saddle part, the body or spigot projecting on the saddle part, the clamping hooks projecting laterally on both sides of the saddle part, and the pressure of the resin at the fusion interface during fusion has the indicator, the thermoplastic resin of the electric fusion saddle system joints forming the fused portion of the annular mounting the mat embedded heating wire spirally saddle seat surface, the saddle seat to the mat The inner heating wire that forms the fusion part on the surface is attached so as to be shifted in the direction of the tube axis so that it does not come into the hole drilled by the hole saw through the trunk part or spigot. An electric fusion saddle-type joint provided on the most distant fusion part. サドル部と、サドル部上に突設される胴部又はスピゴットと、サドル部の両側に側方に突設されるクランプ用の鍔と、融着時の融着界面での樹脂の圧力によって上昇するインジケータを有し、サドル部座面には電熱線が渦巻状に埋設される熱可塑性樹脂製の電気融着サドル系継手において、上記インジケータを融着部上より斜め外向きに傾斜させたことを特徴とする電気融着サドル系継手。Increased by the saddle part, the body or spigot projecting on the saddle part, the clamping hooks projecting laterally on both sides of the saddle part, and the pressure of the resin at the fusion interface during fusion In the electric fusion saddle joint made of thermoplastic resin in which the heating wire is spirally embedded in the saddle portion seating surface, the indicator is inclined obliquely outward from the fusion portion. An electric fusion saddle joint characterized by
JP2000364417A 2000-11-30 2000-11-30 Electric fusion saddle joint Expired - Lifetime JP4260356B2 (en)

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JP2005321050A (en) * 2004-05-10 2005-11-17 Mitsui Chemicals Inc Electric fusion joint
JP2006307968A (en) * 2005-04-28 2006-11-09 Mitsui Chemicals Inc Branch joint
CN112628511A (en) * 2020-12-01 2021-04-09 宁波市宇华电器有限公司 Electric smelting bypass saddle pipe fitting capable of recovering drilling tool under pressure without stopping gas
CN112628512B (en) * 2020-12-01 2022-11-18 宁波宇华实业股份有限公司 An electrofusion bypass saddle-shaped pipe fitting that can self-adaptively control welding thermal deformation

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